/src/wireshark/epan/dissectors/packet-icmpv6.c

Source
/* packet-icmpv6.c
 * Routines for ICMPv6 packet disassembly
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * MobileIPv6 support added by Tomislav Borosa <tomislav.borosa@siemens.hr>
 * Copyright 2006, Nicolas DICHTEL - 6WIND - <nicolas.dichtel@6wind.com>
 *
 * HMIPv6 support added by Martti Kuparinen <martti.kuparinen@iki.fi>
 *
 * FMIPv6 support added by Martin Andre <andre@clarinet.u-strasbg.fr>
 *
 * RPL support added by Colin O'Flynn & Owen Kirby.
 *
 * Enhance ICMPv6 dissector by Alexis La Goutte
 *
 * P2P-RPL support added by Cenk Gundogan <cnkgndgn@gmail.com>
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "config.h"

#include <math.h>

#include <epan/packet.h>
#include <epan/in_cksum.h>
#include <epan/expert.h>
#include <epan/conversation.h>
#include <epan/sequence_analysis.h>
#include <epan/tap.h>
#include <epan/capture_dissectors.h>
#include <epan/unit_strings.h>
#include <epan/proto_data.h>
#include <epan/strutil.h>
#include <epan/tfs.h>
#include <epan/iana-info.h>
#include <wsutil/array.h>
#include <wsutil/pow2.h>

#include "packet-ber.h"
#include "packet-dns.h"
#include "packet-x509af.h"
#include "packet-x509if.h"
#include "packet-icmp.h"    /* same transaction_t used for both v4 and v6 */
#include "packet-ieee802154.h"
#include "packet-6lowpan.h"
#include "packet-ip.h"

void proto_register_icmpv6(void);
void proto_reg_handoff_icmpv6(void);

/*
 * The information used comes from:
 * RFC 1885/2463/4443: Internet Control Message Protocol (ICMPv6) for the Internet Protocol Version 6 (IPv6) Specification
 * RFC 2461/4861: Neighbor Discovery for IP Version 6 (IPv6)
 * RFC 2491: IPv6 over Non-Broadcast Multiple Access (NBMA) networks
 * RFC 2710: Multicast Listener Discovery for IPv6
 * RFC 2894: Router Renumbering for IPv6
 * RFC 3122: Extensions to IPv6 Neighbor Discovery for Inverse Discovery Specification
 * RFC 3775/6275: Mobility Support in IPv6
 * RFC 3810: Multicast Listener Discovery Version 2 (MLDv2) for IPv6
 * RFC 3971: SEcure Neighbor Discovery (SEND)
 * RFC 4065: Instructions for Seamoby and Experimental Mobility Protocol IANA Allocations
 * RFC 4068/5268/5568: Fast Handovers for Mobile IPv6 (Mobile IPv6 Fast Handovers)
 * RFC 4140/5380: Hierarchical Mobile IPv6 Mobility Management (HMIPv6)
 * RFC 4191: Default Router Preferences and More-Specific Routes
 * RFC 4286: Multicast Router Discovery
 * RFC 4620: IPv6 Node Information Queries
 * RFC 5006/6106: IPv6 Router Advertisement Options for DNS Configuration
 * RFC 5075/5175: IPv6 Router Advertisement Flags Option
 * RFC 5269: Distributing a Symmetric Fast Mobile IPv6 (FMIPv6) Handover Key Using SEcure Neighbor Discovery (SEND)
 * RFC 5271: Mobile IPv6 Fast Handovers for 3G CDMA Networks
 * RFC 6275: Mobility Support in IPv6
 * RFC 6495: Subject Key Identifier (SKI) SEND Name Type fields
 * RFC 6496: Secure Proxy ND Support for SEND
 * RFC 6550: RPL: IPv6 Routing Protocol for Low power and Lossy Networks
 * RFC 6554: An IPv6 Routing Header for Source Routes with RPL
 * RFC 6743: ICMP Locator Update message for ILNPv6
 * RFC 6775: Neighbor Discovery Optimization for Low Power and Lossy Networks (6LoWPAN)
 * RFC 6997: Reactive Discovery of Point-to-Point Routes in Low-Power and Lossy Networks
 * RFC 7112: Implications of Oversized IPv6 Header Chains
 * RFC 7400: 6LoWPAN-GHC: Generic Header Compression for IPv6 over Low-Power Wireless Personal Area Networks (6LoWPANs)
 * RFC 7731: MPL Control Message
 * RFC 8335: PROBE: A Utility for Probing Interfaces
 * RFC 8781: Discovering PREF64 in Router Advertisements
 * RFC 8505: Registration Extensions for IPv6 over Low-Power Wireless Personal Area Network (6LoWPAN) Neighbor Discovery
 * RFC 8801: Discovering Provisioning Domain Names and Data
 * RFC 9009: Efficient Route Invalidation
 * http://www.iana.org/assignments/icmpv6-parameters (last updated 2016-02-24)
 */

static int proto_icmpv6;
static int hf_icmpv6_type;
static int hf_icmpv6_code;
static int hf_icmpv6_mcast_ra_ad_interval;
static int hf_icmpv6_mcast_ra_reserved;
static int hf_icmpv6_checksum;
static int hf_icmpv6_checksum_status;
static int hf_icmpv6_reserved;
static int hf_icmpv6_data;
static int hf_icmpv6_unknown_data;
static int hf_icmpv6_mtu;
static int hf_icmpv6_pointer;
static int hf_icmpv6_echo_identifier;
static int hf_icmpv6_echo_sequence_number;
static int hf_icmpv6_nonce;
static int hf_icmpv6_data_time;
static int hf_icmpv6_data_time_relative;

/* RFC 2461/4861 : Neighbor Discovery for IP version 6 (IPv6) */
static int hf_icmpv6_nd_ra_cur_hop_limit;
static int hf_icmpv6_nd_ra_flag;
static int hf_icmpv6_nd_ra_flag_m;
static int hf_icmpv6_nd_ra_flag_o;
static int hf_icmpv6_nd_ra_flag_h;
static int hf_icmpv6_nd_ra_flag_prf;
static int hf_icmpv6_nd_ra_flag_p;
static int hf_icmpv6_nd_ra_flag_s;
static int hf_icmpv6_nd_ra_flag_rsv;
static int hf_icmpv6_nd_ra_router_lifetime;
static int hf_icmpv6_nd_ra_reachable_time;
static int hf_icmpv6_nd_ra_retrans_timer;
static int hf_icmpv6_nd_ns_target_address;
static int hf_icmpv6_nd_na_flag;
static int hf_icmpv6_nd_na_flag_r;
static int hf_icmpv6_nd_na_flag_s;
static int hf_icmpv6_nd_na_flag_o;
static int hf_icmpv6_nd_na_flag_rsv;
static int hf_icmpv6_nd_na_target_address;
static int hf_icmpv6_nd_rd_target_address;
static int hf_icmpv6_nd_rd_destination_address;

/* ND Options */
static int hf_icmpv6_opt;
static int hf_icmpv6_opt_type;
static int hf_icmpv6_opt_length;
static int hf_icmpv6_opt_linkaddr_mac;
static int hf_icmpv6_opt_src_linkaddr_mac;
static int hf_icmpv6_opt_target_linkaddr_mac;
static int hf_icmpv6_opt_linkaddr;
static int hf_icmpv6_opt_src_linkaddr;
static int hf_icmpv6_opt_target_linkaddr;
static int hf_icmpv6_opt_linkaddr_eui64;
static int hf_icmpv6_opt_src_linkaddr_eui64;
static int hf_icmpv6_opt_target_linkaddr_eui64;
static int hf_icmpv6_opt_prefix_len;
static int hf_icmpv6_opt_prefix_flag;
static int hf_icmpv6_opt_prefix_flag_l;
static int hf_icmpv6_opt_prefix_flag_a;
static int hf_icmpv6_opt_prefix_flag_r;
static int hf_icmpv6_opt_prefix_flag_p;
static int hf_icmpv6_opt_prefix_flag_reserved;
static int hf_icmpv6_opt_prefix_valid_lifetime;
static int hf_icmpv6_opt_prefix_preferred_lifetime;
static int hf_icmpv6_opt_prefix;
static int hf_icmpv6_opt_naack_option_code;
static int hf_icmpv6_opt_naack_status;
static int hf_icmpv6_opt_naack_supplied_ncoa;
static int hf_icmpv6_opt_cga_pad_len;
static int hf_icmpv6_opt_cga;
static int hf_icmpv6_opt_cga_modifier;
static int hf_icmpv6_opt_cga_subnet_prefix;
static int hf_icmpv6_opt_cga_count;
static int hf_icmpv6_opt_cga_subject_public_key_info;
static int hf_icmpv6_opt_cga_ext_type;
static int hf_icmpv6_opt_cga_ext_length;
static int hf_icmpv6_opt_cga_ext_data;
static int hf_icmpv6_opt_rsa_key_hash;
static int hf_icmpv6_opt_digital_signature_padding;
static int hf_icmpv6_opt_ps_key_hash;
static int hf_icmpv6_opt_timestamp;
static int hf_icmpv6_opt_nonce;
static int hf_icmpv6_opt_certificate_padding;
static int hf_icmpv6_opt_ipa_option_code;
static int hf_icmpv6_opt_ipa_prefix_len;
static int hf_icmpv6_opt_ipa_ipv6_address;
static int hf_icmpv6_opt_nrpi_option_code;
static int hf_icmpv6_opt_nrpi_prefix_len;
static int hf_icmpv6_opt_nrpi_prefix;
static int hf_icmpv6_opt_lla_option_code;
static int hf_icmpv6_opt_lla_bytes;
static int hf_icmpv6_opt_pvd_id_flags;
static int hf_icmpv6_opt_pvd_id_flags_h;
static int hf_icmpv6_opt_pvd_id_flags_l;
static int hf_icmpv6_opt_pvd_id_flags_r;
static int hf_icmpv6_opt_pvd_id_flags_reserved;
static int hf_icmpv6_opt_pvd_id_delay;
static int hf_icmpv6_opt_pvd_id_sequence_number;
static int hf_icmpv6_opt_pvd_id_fqdn;
static int hf_icmpv6_opt_map_dist;
static int hf_icmpv6_opt_map_pref;
static int hf_icmpv6_opt_map_flag;
static int hf_icmpv6_opt_map_flag_r;
static int hf_icmpv6_opt_map_flag_reserved;
static int hf_icmpv6_opt_map_valid_lifetime;
static int hf_icmpv6_opt_map_global_address;
static int hf_icmpv6_opt_route_info_flag;
static int hf_icmpv6_opt_route_info_flag_route_preference;
static int hf_icmpv6_opt_route_info_flag_reserved;
static int hf_icmpv6_opt_route_lifetime;
static int hf_icmpv6_opt_name_type;
static int hf_icmpv6_opt_name_x501;
static int hf_icmpv6_opt_name_fqdn;
static int hf_icmpv6_opt_cert_type;
static int hf_icmpv6_x509if_Name;
static int hf_icmpv6_x509af_Certificate;
static int hf_icmpv6_opt_redirected_packet;
static int hf_icmpv6_opt_mtu;
static int hf_icmpv6_opt_nbma_shortcut_limit;
static int hf_icmpv6_opt_advertisement_interval;
static int hf_icmpv6_opt_home_agent_preference;
static int hf_icmpv6_opt_home_agent_lifetime;
static int hf_icmpv6_opt_ipv6_address;
static int hf_icmpv6_opt_reserved;
static int hf_icmpv6_opt_padding;
static int hf_icmpv6_opt_rdnss_lifetime;
static int hf_icmpv6_opt_rdnss;
static int hf_icmpv6_opt_efo;
static int hf_icmpv6_opt_efo_rsv;
static int hf_icmpv6_opt_efo_pex;
static int hf_icmpv6_opt_hkr_pad_length;
static int hf_icmpv6_opt_hkr_at;
static int hf_icmpv6_opt_hkr_reserved;
static int hf_icmpv6_opt_hkr_encryption_public_key;
static int hf_icmpv6_opt_hkr_padding;
static int hf_icmpv6_opt_hkr_lifetime;
static int hf_icmpv6_opt_hkr_encrypted_handover_key;
static int hf_icmpv6_opt_hai_option_code;
static int hf_icmpv6_opt_hai_length;
static int hf_icmpv6_opt_hai_value;
static int hf_icmpv6_opt_mn_option_code;
static int hf_icmpv6_opt_mn_length;
static int hf_icmpv6_opt_mn_value;
static int hf_icmpv6_opt_dnssl_lifetime;
static int hf_icmpv6_opt_dnssl;

static int hf_icmpv6_opt_aro_status;
static int hf_icmpv6_opt_earo_opaque;
static int hf_icmpv6_opt_earo_flag;
static int hf_icmpv6_opt_earo_flag_reserved;
static int hf_icmpv6_opt_earo_flag_c;
static int hf_icmpv6_opt_earo_flag_p;
static int hf_icmpv6_opt_earo_flag_i;
static int hf_icmpv6_opt_earo_flag_t;
static int hf_icmpv6_opt_earo_flag_r;
static int hf_icmpv6_opt_earo_tid;
static int hf_icmpv6_opt_earo_rovr;
static int hf_icmpv6_opt_earo_flag_f;
static int hf_icmpv6_opt_earo_prefix_len;
static int hf_icmpv6_opt_earo_reserved;
static int hf_icmpv6_opt_aro_registration_lifetime;
static int hf_icmpv6_opt_aro_eui64;
static int hf_icmpv6_opt_6co_context_length;
static int hf_icmpv6_opt_6co_flag;
static int hf_icmpv6_opt_6co_flag_c;
static int hf_icmpv6_opt_6co_flag_cid;
static int hf_icmpv6_opt_6co_flag_reserved;
static int hf_icmpv6_opt_6co_valid_lifetime;
static int hf_icmpv6_opt_6co_context_prefix;
static int hf_icmpv6_opt_abro_version_low;
static int hf_icmpv6_opt_abro_version_high;
static int hf_icmpv6_opt_abro_valid_lifetime;
static int hf_icmpv6_opt_abro_6lbr_address;
static int hf_icmpv6_opt_6cio_flag;
static int hf_icmpv6_opt_6cio_flag_experimental;
static int hf_icmpv6_opt_6cio_flag_x;
static int hf_icmpv6_opt_6cio_flag_a;
static int hf_icmpv6_opt_6cio_flag_d;
static int hf_icmpv6_opt_6cio_flag_l;
static int hf_icmpv6_opt_6cio_flag_b;
static int hf_icmpv6_opt_6cio_flag_p;
static int hf_icmpv6_opt_6cio_flag_e;
static int hf_icmpv6_opt_6cio_flag_g;
static int hf_icmpv6_opt_6cio_flag_f;
static int hf_icmpv6_opt_6cio_flag_reserved;

static int hf_icmpv6_opt_captive_portal;

static int hf_icmpv6_opt_pref64_scaled_lifetime;
static int hf_icmpv6_opt_pref64_plc;
static int hf_icmpv6_opt_pref64_prefix;
static int hf_icmpv6_opt_dnr_svcpriority;
static int hf_icmpv6_opt_dnr_lifetime;
static int hf_icmpv6_opt_dnr_auth_domain_name_len;
static int hf_icmpv6_opt_dnr_auth_domain_name;
static int hf_icmpv6_opt_dnr_addrs_len;
static int hf_icmpv6_opt_dnr_addrs;
static int hf_icmpv6_opt_dnr_addrs_ip;
static int hf_icmpv6_opt_dnr_svc_params_len;
static int hf_icmpv6_opt_dnr_padding;

/* RFC 2710: Multicast Listener Discovery for IPv6 */
static int hf_icmpv6_mld_mrd;
static int hf_icmpv6_mld_multicast_address;

/* RFC 2894: Router Renumbering for IPv6 */
static int hf_icmpv6_rr_sequencenumber;
static int hf_icmpv6_rr_segmentnumber;
static int hf_icmpv6_rr_flag;
static int hf_icmpv6_rr_flag_t;
static int hf_icmpv6_rr_flag_r;
static int hf_icmpv6_rr_flag_a;
static int hf_icmpv6_rr_flag_s;
static int hf_icmpv6_rr_flag_p;
static int hf_icmpv6_rr_flag_rsv;
static int hf_icmpv6_rr_maxdelay;
static int hf_icmpv6_rr_pco_mp_part;
static int hf_icmpv6_rr_pco_mp_opcode;
static int hf_icmpv6_rr_pco_mp_oplength;
static int hf_icmpv6_rr_pco_mp_ordinal;
static int hf_icmpv6_rr_pco_mp_matchlen;
static int hf_icmpv6_rr_pco_mp_minlen;
static int hf_icmpv6_rr_pco_mp_maxlen;
static int hf_icmpv6_rr_pco_mp_matchprefix;
static int hf_icmpv6_rr_pco_up_part;
static int hf_icmpv6_rr_pco_up_uselen;
static int hf_icmpv6_rr_pco_up_keeplen;
static int hf_icmpv6_rr_pco_up_flagmask;
static int hf_icmpv6_rr_pco_up_flagmask_l;
static int hf_icmpv6_rr_pco_up_flagmask_a;
static int hf_icmpv6_rr_pco_up_flagmask_reserved;
static int hf_icmpv6_rr_pco_up_raflags;
static int hf_icmpv6_rr_pco_up_raflags_l;
static int hf_icmpv6_rr_pco_up_raflags_a;
static int hf_icmpv6_rr_pco_up_raflags_reserved;
static int hf_icmpv6_rr_pco_up_validlifetime;
static int hf_icmpv6_rr_pco_up_preferredlifetime;
static int hf_icmpv6_rr_pco_up_flag;
static int hf_icmpv6_rr_pco_up_flag_v;
static int hf_icmpv6_rr_pco_up_flag_p;
static int hf_icmpv6_rr_pco_up_flag_reserved;
static int hf_icmpv6_rr_pco_up_useprefix;
static int hf_icmpv6_rr_rm;
static int hf_icmpv6_rr_rm_flag;
static int hf_icmpv6_rr_rm_flag_b;
static int hf_icmpv6_rr_rm_flag_f;
static int hf_icmpv6_rr_rm_flag_reserved;
static int hf_icmpv6_rr_rm_ordinal;
static int hf_icmpv6_rr_rm_matchedlen;
static int hf_icmpv6_rr_rm_interfaceindex;
static int hf_icmpv6_rr_rm_matchedprefix;

/* RFC 3810: Multicast Listener Discovery Version 2 (MLDv2) for IPv6 */
static int hf_icmpv6_mld_mrc;
static int hf_icmpv6_mld_flag;
static int hf_icmpv6_mld_flag_s;
static int hf_icmpv6_mld_flag_qrv;
static int hf_icmpv6_mld_flag_rsv;
static int hf_icmpv6_mld_qqi;
static int hf_icmpv6_mld_nb_sources;
static int hf_icmpv6_mld_source_address;
static int hf_icmpv6_mldr_nb_mcast_records;
static int hf_icmpv6_mldr_mar;
static int hf_icmpv6_mldr_mar_record_type;
static int hf_icmpv6_mldr_mar_aux_data_len;
static int hf_icmpv6_mldr_mar_nb_sources;
static int hf_icmpv6_mldr_mar_multicast_address;
static int hf_icmpv6_mldr_mar_source_address;
static int hf_icmpv6_mldr_mar_auxiliary_data;

/* RFC3775/6275: Mobility Support in IPv6 */
static int hf_icmpv6_mip6_identifier;
static int hf_icmpv6_mip6_home_agent_address;
static int hf_icmpv6_mip6_flag;
static int hf_icmpv6_mip6_flag_m;
static int hf_icmpv6_mip6_flag_o;
static int hf_icmpv6_mip6_flag_rsv;

/* RFC3971: SEcure Neighbor Discovery (SEND) */
static int hf_icmpv6_send_identifier;
static int hf_icmpv6_send_all_components;
static int hf_icmpv6_send_component;

/* RFC 4068/5268/5568: Fast Handovers for Mobile IPv6 ( Mobile IPv6 Fast Handovers ) */
static int hf_icmpv6_fmip6_subtype;
static int hf_icmpv6_fmip6_hi_flag;
static int hf_icmpv6_fmip6_hi_flag_s;
static int hf_icmpv6_fmip6_hi_flag_u;
static int hf_icmpv6_fmip6_hi_flag_reserved;
static int hf_icmpv6_fmip6_identifier;

/* RFC 4286: Multicast Router Discovery */
static int hf_icmpv6_mcast_ra_query_interval;
static int hf_icmpv6_mcast_ra_robustness_variable;

/* RFC 4620: IPv6 Node Information Queries */
static int hf_icmpv6_ni_qtype;
static int hf_icmpv6_ni_flag;
static int hf_icmpv6_ni_flag_g;
static int hf_icmpv6_ni_flag_s;
static int hf_icmpv6_ni_flag_l;
static int hf_icmpv6_ni_flag_c;
static int hf_icmpv6_ni_flag_a;
static int hf_icmpv6_ni_flag_t;
static int hf_icmpv6_ni_flag_rsv;
static int hf_icmpv6_ni_nonce;
static int hf_icmpv6_ni_query_subject_ipv6;
static int hf_icmpv6_ni_query_subject_fqdn;
static int hf_icmpv6_ni_query_subject_ipv4;
static int hf_icmpv6_ni_reply_node_ttl;
static int hf_icmpv6_ni_reply_node_name;
static int hf_icmpv6_ni_reply_node_address;
static int hf_icmpv6_ni_reply_ipv4_address;

/* RFC 4884: Extended ICMP */
static int hf_icmpv6_length;

/* RPL: RFC 6550/6997/9009 : Routing and Discovery of P2P Routes in Low-Power and Lossy Networks. Efficient route invalidation. */
static int hf_icmpv6_rpl_dis_flag;
static int hf_icmpv6_rpl_dio_instance;
static int hf_icmpv6_rpl_dio_version;
static int hf_icmpv6_rpl_dio_rank;
static int hf_icmpv6_rpl_dio_flag;
static int hf_icmpv6_rpl_dio_flag_g;
static int hf_icmpv6_rpl_dio_flag_0;
static int hf_icmpv6_rpl_dio_flag_mop;
static int hf_icmpv6_rpl_dio_flag_prf;
static int hf_icmpv6_rpl_dio_dtsn;
static int hf_icmpv6_rpl_dio_dagid;
static int hf_icmpv6_rpl_dao_instance;
static int hf_icmpv6_rpl_dao_flag;
static int hf_icmpv6_rpl_dao_flag_k;
static int hf_icmpv6_rpl_dao_flag_d;
static int hf_icmpv6_rpl_dao_flag_rsv;
static int hf_icmpv6_rpl_dao_sequence;
static int hf_icmpv6_rpl_dao_dodagid;
static int hf_icmpv6_rpl_daoack_instance;
static int hf_icmpv6_rpl_daoack_flag;
static int hf_icmpv6_rpl_daoack_flag_d;
static int hf_icmpv6_rpl_daoack_flag_rsv;
static int hf_icmpv6_rpl_daoack_sequence;
static int hf_icmpv6_rpl_daoack_status;
static int hf_icmpv6_rpl_daoack_dodagid;
static int hf_icmpv6_rpl_dco_instance;
static int hf_icmpv6_rpl_dco_flags;
static int hf_icmpv6_rpl_dco_flag_k;
static int hf_icmpv6_rpl_dco_flag_d;
static int hf_icmpv6_rpl_dco_flag_rsv;
static int hf_icmpv6_rpl_dco_status;
static int hf_icmpv6_rpl_dco_sequence;
static int hf_icmpv6_rpl_dco_dodagid;
static int hf_icmpv6_rpl_dcoack_instance;
static int hf_icmpv6_rpl_dcoack_flag;
static int hf_icmpv6_rpl_dcoack_flag_d;
static int hf_icmpv6_rpl_dcoack_flag_rsv;
static int hf_icmpv6_rpl_dcoack_sequence;
static int hf_icmpv6_rpl_dcoack_status;
static int hf_icmpv6_rpl_dcoack_dodagid;
static int hf_icmpv6_rpl_cc_instance;
static int hf_icmpv6_rpl_cc_flag;
static int hf_icmpv6_rpl_cc_flag_r;
static int hf_icmpv6_rpl_cc_flag_rsv;
static int hf_icmpv6_rpl_cc_nonce;
static int hf_icmpv6_rpl_cc_dodagid;
static int hf_icmpv6_rpl_cc_destination_counter;
static int hf_icmpv6_rpl_secure_flag;
static int hf_icmpv6_rpl_secure_flag_t;
static int hf_icmpv6_rpl_secure_flag_rsv;
static int hf_icmpv6_rpl_secure_algorithm;
static int hf_icmpv6_rpl_secure_kim;
static int hf_icmpv6_rpl_secure_lvl;
static int hf_icmpv6_rpl_secure_rsv;
static int hf_icmpv6_rpl_secure_counter;
static int hf_icmpv6_rpl_secure_key_source;
static int hf_icmpv6_rpl_secure_key_index;
static int hf_icmpv6_rpl_opt;
static int hf_icmpv6_rpl_opt_type;
static int hf_icmpv6_rpl_opt_length;
static int hf_icmpv6_rpl_opt_reserved;
static int hf_icmpv6_rpl_opt_padn;
static int hf_icmpv6_rpl_opt_metric_type;
static int hf_icmpv6_rpl_opt_metric_flags;
static int hf_icmpv6_rpl_opt_metric_reserved;
static int hf_icmpv6_rpl_opt_metric_flag_p;
static int hf_icmpv6_rpl_opt_metric_flag_c;
static int hf_icmpv6_rpl_opt_metric_flag_o;
static int hf_icmpv6_rpl_opt_metric_flag_r;
static int hf_icmpv6_rpl_opt_metric_a;
static int hf_icmpv6_rpl_opt_metric_prec;
static int hf_icmpv6_rpl_opt_metric_len;
static int hf_icmpv6_rpl_opt_metric_nsa_object;
static int hf_icmpv6_rpl_opt_metric_nsa_object_reserved;
static int hf_icmpv6_rpl_opt_metric_nsa_object_flags;
static int hf_icmpv6_rpl_opt_metric_nsa_object_flag_a;
static int hf_icmpv6_rpl_opt_metric_nsa_object_flag_o;
static int hf_icmpv6_rpl_opt_metric_nsa_object_opttlv_object;
static int hf_icmpv6_rpl_opt_metric_nsa_object_opttlv_object_type;
static int hf_icmpv6_rpl_opt_metric_nsa_object_opttlv_object_length;
static int hf_icmpv6_rpl_opt_metric_nsa_object_opttlv_object_data;
static int hf_icmpv6_rpl_opt_metric_ne_object;
static int hf_icmpv6_rpl_opt_metric_ne_object_flags;
static int hf_icmpv6_rpl_opt_metric_ne_object_flag_i;
static int hf_icmpv6_rpl_opt_metric_ne_object_type;
static int hf_icmpv6_rpl_opt_metric_ne_object_flag_e;
static int hf_icmpv6_rpl_opt_metric_ne_object_energy;
static int hf_icmpv6_rpl_opt_metric_hp_object;
static int hf_icmpv6_rpl_opt_metric_hp_object_reserved;
static int hf_icmpv6_rpl_opt_metric_hp_object_flags;
static int hf_icmpv6_rpl_opt_metric_hp_object_hp;
static int hf_icmpv6_rpl_opt_metric_lt_object_lt;
static int hf_icmpv6_rpl_opt_metric_ll_object_ll;
static int hf_icmpv6_rpl_opt_metric_lql_object;
static int hf_icmpv6_rpl_opt_metric_lql_object_res;
static int hf_icmpv6_rpl_opt_metric_lql_object_val;
static int hf_icmpv6_rpl_opt_metric_lql_object_counter;
static int hf_icmpv6_rpl_opt_metric_etx_object_etx;
static int hf_icmpv6_rpl_opt_metric_lc_object;
static int hf_icmpv6_rpl_opt_metric_lc_object_res;
static int hf_icmpv6_rpl_opt_metric_lc_object_lc;
static int hf_icmpv6_rpl_opt_metric_lc_object_counter;
static int hf_icmpv6_rpl_opt_metric_lc_object_reserved;
static int hf_icmpv6_rpl_opt_metric_lc_object_flag_i;
static int hf_icmpv6_rpl_opt_route_prefix_length;
static int hf_icmpv6_rpl_opt_route_flag;
static int hf_icmpv6_rpl_opt_route_pref;
static int hf_icmpv6_rpl_opt_route_reserved;
static int hf_icmpv6_rpl_opt_route_lifetime;
static int hf_icmpv6_rpl_opt_route_prefix;
static int hf_icmpv6_rpl_opt_config_flag;
static int hf_icmpv6_rpl_opt_config_reserved;
static int hf_icmpv6_rpl_opt_config_auth;
static int hf_icmpv6_rpl_opt_config_pcs;
static int hf_icmpv6_rpl_opt_config_doublings;
static int hf_icmpv6_rpl_opt_config_min_interval;
static int hf_icmpv6_rpl_opt_config_redundancy;
static int hf_icmpv6_rpl_opt_config_rank_incr;
static int hf_icmpv6_rpl_opt_config_hop_rank_inc;
static int hf_icmpv6_rpl_opt_config_ocp;
static int hf_icmpv6_rpl_opt_config_rsv;
static int hf_icmpv6_rpl_opt_config_def_lifetime;
static int hf_icmpv6_rpl_opt_config_lifetime_unit;
static int hf_icmpv6_rpl_opt_target_flag;
static int hf_icmpv6_rpl_opt_target_prefix_length;
static int hf_icmpv6_rpl_opt_target_prefix;
static int hf_icmpv6_rpl_opt_transit_flag;
static int hf_icmpv6_rpl_opt_transit_flag_e;
static int hf_icmpv6_rpl_opt_transit_flag_i;
static int hf_icmpv6_rpl_opt_transit_flag_rsv;
static int hf_icmpv6_rpl_opt_transit_pathseq;
static int hf_icmpv6_rpl_opt_transit_pathctl;
static int hf_icmpv6_rpl_opt_transit_pathctl_pc1;
static int hf_icmpv6_rpl_opt_transit_pathctl_pc2;
static int hf_icmpv6_rpl_opt_transit_pathctl_pc3;
static int hf_icmpv6_rpl_opt_transit_pathctl_pc4;
static int hf_icmpv6_rpl_opt_transit_pathlifetime;
static int hf_icmpv6_rpl_opt_transit_parent;
static int hf_icmpv6_rpl_opt_solicited_instance;
static int hf_icmpv6_rpl_opt_solicited_flag;
static int hf_icmpv6_rpl_opt_solicited_flag_v;
static int hf_icmpv6_rpl_opt_solicited_flag_i;
static int hf_icmpv6_rpl_opt_solicited_flag_d;
static int hf_icmpv6_rpl_opt_solicited_flag_rsv;
static int hf_icmpv6_rpl_opt_solicited_dodagid;
static int hf_icmpv6_rpl_opt_solicited_version;
static int hf_icmpv6_rpl_opt_prefix;
static int hf_icmpv6_rpl_opt_prefix_flag;
static int hf_icmpv6_rpl_opt_prefix_flag_l;
static int hf_icmpv6_rpl_opt_prefix_flag_a;
static int hf_icmpv6_rpl_opt_prefix_flag_r;
static int hf_icmpv6_rpl_opt_prefix_flag_rsv;
static int hf_icmpv6_rpl_opt_prefix_vlifetime;
static int hf_icmpv6_rpl_opt_prefix_plifetime;
static int hf_icmpv6_rpl_opt_prefix_length;
static int hf_icmpv6_rpl_opt_targetdesc;
static int hf_icmpv6_rpl_opt_route_discovery_flag;
static int hf_icmpv6_rpl_opt_route_discovery_reply;
static int hf_icmpv6_rpl_opt_route_discovery_hop_by_hop;
static int hf_icmpv6_rpl_opt_route_discovery_num_of_routes;
static int hf_icmpv6_rpl_opt_route_discovery_compr;
static int hf_icmpv6_rpl_opt_route_discovery_lifetime;
static int hf_icmpv6_rpl_opt_route_discovery_nh;
static int hf_icmpv6_rpl_opt_route_discovery_maxrank;
static int hf_icmpv6_rpl_opt_route_discovery_target_addr;
static int hf_icmpv6_rpl_opt_route_discovery_addr_vec;
static int hf_icmpv6_rpl_opt_route_discovery_addr_vec_addr;
static int hf_icmpv6_rpl_p2p_dro_instance;
static int hf_icmpv6_rpl_p2p_dro_version;
static int hf_icmpv6_rpl_p2p_dro_flag;
static int hf_icmpv6_rpl_p2p_dro_flag_stop;
static int hf_icmpv6_rpl_p2p_dro_flag_ack;
static int hf_icmpv6_rpl_p2p_dro_flag_seq;
static int hf_icmpv6_rpl_p2p_dro_flag_reserved;
static int hf_icmpv6_rpl_p2p_dro_dagid;
static int hf_icmpv6_rpl_p2p_droack_flag;
static int hf_icmpv6_rpl_p2p_droack_flag_seq;
static int hf_icmpv6_rpl_p2p_droack_flag_reserved;

/* RFC6743 Locator Update (156) */
static int hf_icmpv6_ilnp_nb_locs;
static int hf_icmpv6_ilnp_locator;
static int hf_icmpv6_ilnp_preference;
static int hf_icmpv6_ilnp_lifetime;

static int hf_icmpv6_da_code_prefix;
static int hf_icmpv6_da_code_suffix;
static int hf_icmpv6_dar_code_suffix;
static int hf_icmpv6_dac_code_suffix;
static int hf_icmpv6_da_status;
static int hf_icmpv6_da_rsv;
static int hf_icmpv6_da_lifetime;
static int hf_icmpv6_da_rovr;
static int hf_icmpv6_da_eui64;
static int hf_icmpv6_da_raddr;

static heur_dissector_list_t icmpv6_heur_subdissector_list;
static int icmpv6_tap;

/* RFC 7731 MPL (159) */
static int hf_icmpv6_mpl_seed_info_min_sequence;
static int hf_icmpv6_mpl_seed_info_bm_len;
static int hf_icmpv6_mpl_seed_info_s;
static int hf_icmpv6_mpl_seed_info_seed_id;
static int hf_icmpv6_mpl_seed_info_sequence;

/* Extended Echo - Probe  (RFC8335)*/
static int hf_icmpv6_ext_echo_seq_num;
static int hf_icmpv6_ext_echo_req_reserved;
static int hf_icmpv6_ext_echo_req_local;
static int hf_icmpv6_ext_echo_rsp_state;
static int hf_icmpv6_ext_echo_rsp_reserved;
static int hf_icmpv6_ext_echo_rsp_active;
static int hf_icmpv6_ext_echo_rsp_ipv4;
static int hf_icmpv6_ext_echo_rsp_ipv6;

/* Conversation related data */
static int hf_icmpv6_resp_in;
static int hf_icmpv6_resp_to;
static int hf_icmpv6_no_resp;
static int hf_icmpv6_resptime;

typedef struct _icmpv6_conv_info_t {
    wmem_tree_t *unmatched_pdus;
    wmem_tree_t *matched_pdus;
} icmpv6_conv_info_t;

static icmp_transaction_t *transaction_start(packet_info *pinfo, proto_tree *tree, uint32_t *key);
static icmp_transaction_t *transaction_end(packet_info *pinfo, proto_tree *tree, uint32_t *key);

static int ett_icmpv6;
static int ett_icmpv6_opt;
static int ett_icmpv6_mar;
static int ett_icmpv6_flag_prefix;
static int ett_icmpv6_flag_map;
static int ett_icmpv6_flag_pvd_id;
static int ett_icmpv6_flag_route_info;
static int ett_icmpv6_flag_6lowpan;
static int ett_icmpv6_flag_efo;
static int ett_icmpv6_flag_earo;
static int ett_icmpv6_rpl_opt;
static int ett_icmpv6_rpl_metric_type;
static int ett_icmpv6_rpl_metric_flags;
static int ett_icmpv6_rpl_metric_nsa_object;
static int ett_icmpv6_rpl_metric_nsa_object_tlv_type;
static int ett_icmpv6_rpl_metric_ne_object;
static int ett_icmpv6_rpl_metric_hp_object;
static int ett_icmpv6_rpl_metric_lql_object;
static int ett_icmpv6_rpl_metric_lc_object;
static int ett_icmpv6_rpl_flag_routing;
static int ett_icmpv6_rpl_flag_config;
static int ett_icmpv6_rpl_flag_transit;
static int ett_icmpv6_rpl_flag_solicited;
static int ett_icmpv6_rpl_flag_prefix;
static int ett_icmpv6_rpl_route_discovery_flag;
static int ett_icmpv6_rpl_route_discovery_addr_vec;
static int ett_icmpv6_rpl_transit_pathctl;
static int ett_icmpv6_rpl_p2p_dro_flag;
static int ett_icmpv6_rpl_p2p_droack_flag;
static int ett_icmpv6_flag_ni;
static int ett_icmpv6_flag_rr;
static int ett_icmpv6_rr_mp;
static int ett_icmpv6_rr_up;
static int ett_icmpv6_rr_up_flag_mask;
static int ett_icmpv6_rr_up_flag_ra;
static int ett_icmpv6_rr_up_flag;
static int ett_icmpv6_rr_rm;
static int ett_icmpv6_rr_rm_flag;
static int ett_icmpv6_flag_mld;
static int ett_icmpv6_flag_ra;
static int ett_icmpv6_flag_na;
static int ett_icmpv6_flag_mip6;
static int ett_icmpv6_flag_fmip6;
static int ett_icmpv6_flag_secure;
static int ett_icmpv6_flag_rpl_dio;
static int ett_icmpv6_flag_rpl_dao;
static int ett_icmpv6_flag_rpl_daoack;
static int ett_icmpv6_flag_rpl_dco;
static int ett_icmpv6_flag_rpl_dcoack;
static int ett_icmpv6_flag_rpl_cc;
static int ett_icmpv6_flag_6cio;
static int ett_icmpv6_opt_name;
static int ett_icmpv6_cga_param_name;
static int ett_icmpv6_mpl_seed_info;
static int ett_icmpv6_mpl_seed_info_bm;
static int ett_icmpv6_opt_dnr_addrs;

static expert_field ei_icmpv6_type_error;
static expert_field ei_icmpv6_invalid_option_length;
static expert_field ei_icmpv6_opt_dnr_adn_only_mode;
static expert_field ei_icmpv6_undecoded_option;
static expert_field ei_icmpv6_unknown_data;
static expert_field ei_icmpv6_undecoded_rpl_option;
static expert_field ei_icmpv6_undecoded_type;
static expert_field ei_icmpv6_rr_pco_mp_matchlen;
static expert_field ei_icmpv6_rr_pco_mp_matchedlen;
static expert_field ei_icmpv6_checksum;
static expert_field ei_icmpv6_resp_not_found;
static expert_field ei_icmpv6_rpl_unknown_metric;
static expert_field ei_icmpv6_rpl_p2p_hop_by_hop;
static expert_field ei_icmpv6_rpl_p2p_num_of_routes;
static expert_field ei_icmpv6_rpl_p2p_dro_rdo_zero;
static expert_field ei_icmpv6_rpl_p2p_dro_zero;

static dissector_handle_t icmpv6_handle;

static dissector_handle_t ipv6_handle;
static dissector_handle_t icmp_extension_handle;
static dissector_handle_t svc_params_handle;

/* Cached protocol identifier */
static int proto_ieee802154;

#define ICMP6_DST_UNREACH                 1
#define ICMP6_PACKET_TOO_BIG              2
#define ICMP6_TIME_EXCEEDED               3
#define ICMP6_PARAM_PROB                  4
#define ICMP6_ECHO_REQUEST              128
#define ICMP6_ECHO_REPLY                129
#define ICMP6_MEMBERSHIP_QUERY          130
#define ICMP6_MEMBERSHIP_REPORT         131
#define ICMP6_MEMBERSHIP_REDUCTION      132
#define ICMP6_ND_ROUTER_SOLICIT         133
#define ICMP6_ND_ROUTER_ADVERT          134
#define ICMP6_ND_NEIGHBOR_SOLICIT       135
#define ICMP6_ND_NEIGHBOR_ADVERT        136
#define ICMP6_ND_REDIRECT               137
#define ICMP6_ROUTER_RENUMBERING        138
#define ICMP6_NI_QUERY                  139
#define ICMP6_NI_REPLY                  140
#define ICMP6_IND_SOLICIT               141
#define ICMP6_IND_ADVERT                142
#define ICMP6_MLDV2_REPORT              143
#define ICMP6_MIP6_DHAAD_REQUEST        144
#define ICMP6_MIP6_DHAAD_REPLY          145
#define ICMP6_MIP6_MPS                  146
#define ICMP6_MIP6_MPA                  147
#define ICMP6_CERT_PATH_SOL             148
#define ICMP6_CERT_PATH_AD              149
#define ICMP6_EXPERIMENTAL_MOBILITY     150
#define ICMP6_MCAST_ROUTER_ADVERT       151
#define ICMP6_MCAST_ROUTER_SOLICIT      152
#define ICMP6_MCAST_ROUTER_TERM         153
#define ICMP6_FMIPV6_MESSAGES           154
#define ICMP6_RPL_CONTROL               155
#define ICMP6_ILNPV6                    156
#define ICMP6_6LOWPANND_DAR             157
#define ICMP6_6LOWPANND_DAC             158
#define ICMP6_MPL_CONTROL               159
#define ICMP6_EXTECHO                   160
#define ICMP6_EXTECHOREPLY              161


static const value_string icmpv6_type_val[] = {
    { ICMP6_DST_UNREACH,           "Destination Unreachable" },                         /* [RFC4443] */
    { ICMP6_PACKET_TOO_BIG,        "Packet Too Big" },                                  /* [RFC4443] */
    { ICMP6_TIME_EXCEEDED,         "Time Exceeded" },                                   /* [RFC4443] */
    { ICMP6_PARAM_PROB,            "Parameter Problem" },                               /* [RFC4443] */
    { 100,                         "Private experimentation" },                         /* [RFC4443] */
    { 101,                         "Private experimentation" },                         /* [RFC4443] */
    { 127,                         "Reserved for expansion of ICMPv6 error messages" }, /* [RFC4443] */
    { ICMP6_ECHO_REQUEST,          "Echo (ping) request" },                             /* [RFC4443] */
    { ICMP6_ECHO_REPLY,            "Echo (ping) reply" },                               /* [RFC4443] */
    { ICMP6_MEMBERSHIP_QUERY,      "Multicast Listener Query" },                        /* [RFC2710] */
    { ICMP6_MEMBERSHIP_REPORT,     "Multicast Listener Report" },                       /* [RFC2710] */
    { ICMP6_MEMBERSHIP_REDUCTION,  "Multicast Listener Done" },                         /* [RFC2710] */
    { ICMP6_ND_ROUTER_SOLICIT,     "Router Solicitation" },                             /* [RFC4861] */
    { ICMP6_ND_ROUTER_ADVERT,      "Router Advertisement" },                            /* [RFC4861] */
    { ICMP6_ND_NEIGHBOR_SOLICIT,   "Neighbor Solicitation" },                           /* [RFC4861] */
    { ICMP6_ND_NEIGHBOR_ADVERT,    "Neighbor Advertisement" },                          /* [RFC4861] */
    { ICMP6_ND_REDIRECT,           "Redirect" },                                        /* [RFC4861] */
    { ICMP6_ROUTER_RENUMBERING,    "Router Renumbering" },                              /* [RFC2894] */
    { ICMP6_NI_QUERY,              "Node Information Query" },                          /* [RFC4620] */
    { ICMP6_NI_REPLY,              "Node Information Reply" },                          /* [RFC4620] */
    { ICMP6_IND_SOLICIT,           "Inverse Neighbor Discovery Solicitation" },         /* [RFC3122] */
    { ICMP6_IND_ADVERT,            "Inverse Neighbor Discovery Advertisement" },        /* [RFC3122] */
    { ICMP6_MLDV2_REPORT,          "Multicast Listener Report Message v2" },            /* [RFC3810] */
    { ICMP6_MIP6_DHAAD_REQUEST,    "Home Agent Address Discovery Request" },            /* [RFC6275] */
    { ICMP6_MIP6_DHAAD_REPLY,      "Home Agent Address Discovery Reply" },              /* [RFC6275] */
    { ICMP6_MIP6_MPS,              "Mobile Prefix Solicitation" },                      /* [RFC6275] */
    { ICMP6_MIP6_MPA,              "Mobile Prefix Advertisement" },                     /* [RFC6275] */
    { ICMP6_CERT_PATH_SOL,         "Certification Path Solicitation" },                 /* [RFC3971] */
    { ICMP6_CERT_PATH_AD,          "Certification Path Advertisement" },                /* [RFC3971] */
    { ICMP6_EXPERIMENTAL_MOBILITY, "Experimental Mobility" },                           /* [RFC4065] */
    { ICMP6_MCAST_ROUTER_ADVERT,   "Multicast Router Advertisement" },                  /* [RFC4286] */
    { ICMP6_MCAST_ROUTER_SOLICIT,  "Multicast Router Solicitation" },                   /* [RFC4286] */
    { ICMP6_MCAST_ROUTER_TERM,     "Multicast Router Termination" },                    /* [RFC4286] */
    { ICMP6_FMIPV6_MESSAGES,       "FMIPv6" },                                          /* [RFC5568] */
    { ICMP6_RPL_CONTROL,           "RPL Control" },                                     /* [RFC6550] */
    { ICMP6_ILNPV6,                "Locator Update"},                                   /* [RFC6743] */
    { ICMP6_6LOWPANND_DAR,         "Duplicate Address Request"},                        /* [RFC6775] */
    { ICMP6_6LOWPANND_DAC,         "Duplicate Address Confirmation"},                   /* [RFC6775] */
    { ICMP6_MPL_CONTROL,           "MPL Control Message"},                              /* [RFC7731] */
    { ICMP6_EXTECHO,               "Extended Echo request"},                            /* [RFC8335] */
    { ICMP6_EXTECHOREPLY,          "Extended Echo reply"},                              /* [RFC8335] */
    { 200,                         "Private experimentation" },                         /* [RFC4443] */
    { 201,                         "Private experimentation" },                         /* [RFC4443] */
    { 255,                         "Reserved for expansion of ICMPv6 informational messages" }, /* [RFC4443] */
    { 0, NULL }
};

#define ICMP6_DST_UNREACH_NOROUTE               0       /* no route to destination */
#define ICMP6_DST_UNREACH_ADMIN                 1       /* administratively prohibited */
#define ICMP6_DST_UNREACH_NOTNEIGHBOR           2       /* not a neighbor(obsolete) */
#define ICMP6_DST_UNREACH_BEYONDSCOPE           2       /* beyond scope of source address */
#define ICMP6_DST_UNREACH_ADDR                  3       /* address unreachable */
#define ICMP6_DST_UNREACH_NOPORT                4       /* port unreachable */
#define ICMP6_DST_UNREACH_INGR_EGR              5       /* source address failed ingress/egress policy */
#define ICMP6_DST_UNREACH_REJECT                6       /* reject route to destination */
#define ICMP6_DST_UNREACH_ERROR                 7       /* error in Source Routing Header */
#define ICMP6_DST_UNREACH_HEADERS_TOO_LONG      8       /* headers too long */

static const value_string icmpv6_unreach_code_val[] = {
    { ICMP6_DST_UNREACH_NOROUTE,          "No route to destination" },
    { ICMP6_DST_UNREACH_ADMIN,            "Administratively prohibited" },
    { ICMP6_DST_UNREACH_BEYONDSCOPE,      "Beyond scope of source address" },
    { ICMP6_DST_UNREACH_ADDR,             "Address unreachable" },
    { ICMP6_DST_UNREACH_NOPORT,           "Port unreachable" },
    { ICMP6_DST_UNREACH_INGR_EGR,         "Source address failed ingress/egress policy" },
    { ICMP6_DST_UNREACH_REJECT,           "Reject route to destination" },
    { ICMP6_DST_UNREACH_ERROR,            "Error in Source Routing Header" }, /* [RFC6550] [RFC6554] */
    { ICMP6_DST_UNREACH_HEADERS_TOO_LONG, "Headers too long" }, /* [RFC8883] */
    { 0, NULL }
};

#define ICMP6_TIME_EXCEED_TRANSIT       0       /* ttl==0 in transit */
#define ICMP6_TIME_EXCEED_REASSEMBLY    1       /* ttl==0 in reass */

static const value_string icmpv6_timeex_code_val[] = {
    { ICMP6_TIME_EXCEED_TRANSIT,    "Hop limit exceeded in transit" },
    { ICMP6_TIME_EXCEED_REASSEMBLY, "Fragment reassembly time exceeded" },
    { 0, NULL }
};

#define ICMP6_PARAMPROB_HEADER                  0       /* erroneous header field */
#define ICMP6_PARAMPROB_NEXTHEADER              1       /* unrecognized next header */
#define ICMP6_PARAMPROB_OPTION                  2       /* unrecognized option */
#define ICMP6_PARAMPROB_FIRSTFRAG               3       /* IPv6 First Fragment has incomplete IPv6 Header Chain [RFC 7112] */
#define ICMP6_PARAMPROB_HEADERERROR             4       /* SR Upper-layer Header Error [RFC8754] */
#define ICMP6_PARAMPROB_NEXTHEADER_INTERMEDIATE 5       /* Unrecognized Next Header type encountered by intermediate node [RFC8883] */
#define ICMP6_PARAMPROB_HEADER_TOO_BIG          6       /* Extension header too big [RFC8883] */
#define ICMP6_PARAMPROB_HEADER_CHAIN_TOO_LONG   7       /* Extension header chain too long [RFC8883] */
#define ICMP6_PARAMPROB_TOO_MANY_EXTENTIONS     8       /* Too many extension headers [RFC8883] */
#define ICMP6_PARAMPROB_TOO_MANY_OPTIONS        9       /* Too many options in extension header [RFC8883] */
#define ICMP6_PARAMPROB_OPTION_TOO_BIG         10       /* Option too big [RFC8883] */

static const value_string icmpv6_paramprob_code_val[] = {
    { ICMP6_PARAMPROB_HEADER,                  "Erroneous header field encountered" },
    { ICMP6_PARAMPROB_NEXTHEADER,              "Unrecognized Next Header type encountered" },
    { ICMP6_PARAMPROB_OPTION,                  "Unrecognized IPv6 option encountered" },
    { ICMP6_PARAMPROB_FIRSTFRAG,               "IPv6 First Fragment has incomplete IPv6 Header Chain" },
    { ICMP6_PARAMPROB_HEADERERROR,             "SR Upper-layer Header Error" },
    { ICMP6_PARAMPROB_NEXTHEADER_INTERMEDIATE, "Unrecognized Next Header type encountered by intermediate node" },
    { ICMP6_PARAMPROB_HEADER_TOO_BIG,          "Extension header too big" },
    { ICMP6_PARAMPROB_HEADER_CHAIN_TOO_LONG,   "Extension header chain too long" },
    { ICMP6_PARAMPROB_TOO_MANY_EXTENTIONS,     "Too many extension headers" },
    { ICMP6_PARAMPROB_TOO_MANY_OPTIONS,        "Too many options in extension header" },
    { ICMP6_PARAMPROB_OPTION_TOO_BIG,          "Option too big" },
    { 0, NULL }
};


/* RFC2894 - Router Renumbering for IPv6 */

#define ICMP6_ROUTER_RENUMBERING_COMMAND          0     /* rr command */
#define ICMP6_ROUTER_RENUMBERING_RESULT           1     /* rr result */
#define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET   255     /* rr seq num reset */

static const value_string icmpv6_rr_code_val[] = {
    { ICMP6_ROUTER_RENUMBERING_COMMAND,      "Command" },
    { ICMP6_ROUTER_RENUMBERING_RESULT,       "Result" },
    { ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET, "Sequence number reset" },
    { 0, NULL }
};

#define RR_FLAG_T       0x80
#define RR_FLAG_R       0x40
#define RR_FLAG_A       0x20
#define RR_FLAG_S       0x10
#define RR_FLAG_P       0x08
#define RR_FLAG_RSV     0x07

static const value_string rr_pco_mp_opcode_val[] = {
    { 1,    "Add" },
    { 2,    "Change" },
    { 3,    "Set Global" },
    { 0,    NULL }
};


/* RFC3810 - Multicast Listener Discovery Version 2 (MLDv2) for IPv6 */

#define MLDV2_PACKET_MINLEN 28

#define MLD_FLAG_S      0x08
#define MLD_FLAG_QRV    0x07
#define MLD_FLAG_RSV    0xF0

static const value_string mldr_record_type_val[] = {
    { 1, "Include" },
    { 2, "Exclude" },
    { 3, "Changed to include" },
    { 4, "Changed to exclude" },
    { 5, "Allow new sources" },
    { 6, "Block old sources" },
    { 0, NULL }
};

/* RFC 4068/5268/5568: Fast Handovers for Mobile IPv6 ( Mobile IPv6 Fast Handovers ) */

#define FMIP6_SUBTYPE_RTSOLPR   2
#define FMIP6_SUBTYPE_PRRTADV   3
#define FMIP6_SUBTYPE_HI        4
#define FMIP6_SUBTYPE_HACK      5

static const value_string fmip6_subtype_val[] = {
    { FMIP6_SUBTYPE_RTSOLPR,    "Router Solicitation for Proxy Advertisement" },
    { FMIP6_SUBTYPE_PRRTADV,    "Proxy Router Advertisement" },
    { FMIP6_SUBTYPE_HI,         "Handover Initiate" },
    { FMIP6_SUBTYPE_HACK,       "Handover Acknowledge" },
    { 0,                        NULL }
};

static const value_string fmip6_prrtadv_code_val[] = {
    { 0,   "MN should use AP-ID, AR-info tuple" },
    { 1,   "Network Initiated Handover trigger" },
    { 2,   "No new router information" },
    { 3,   "Limited new router information" },
    { 4,   "Unsolicited" },
    { 0,    NULL }
};

static const value_string fmip6_hi_code_val[] = {
    { 0,    "FBU sent from previous link" },
    { 1,    "FBU sent from new link" },
    { 0,    NULL }
};

static const value_string fmip6_hack_code_val[] = {
    { 0,    "Handover Accepted, NCoA valid" },
    { 1,    "Handover Accepted, NCoA not valid" },
    { 2,    "Handover Accepted, NCoA in use" },
    { 3,    "Handover Accepted, NCoA assigned" },
    { 4,    "Handover Accepted, NCoA not assigned" },
    { 128,  "Handover Not Accepted, reason unspecified" },
    { 129,  "Administratively prohibited" },
    { 130,  "Insufficient resources" },
    { 0,    NULL }
};

#define FMIP6_HI_FLAG_S     0x80
#define FMIP6_HI_FLAG_U     0x40
#define FMIP6_HI_FLAG_RSV   0x3F

/* RFC 4620 - IPv6 Node Information Queries */

#define ICMP6_NI_SUBJ_IPV6      0   /* Query Subject is an IPv6 address */
#define ICMP6_NI_SUBJ_FQDN      1   /* Query Subject is a Domain name */
#define ICMP6_NI_SUBJ_IPV4      2   /* Query Subject is an IPv4 address */

#define ICMP6_NI_SUCCESS        0   /* node information successful reply */
#define ICMP6_NI_REFUSED        1   /* node information request is refused */
#define ICMP6_NI_UNKNOWN        2   /* unknown Qtype */

#define NI_QTYPE_NOOP           0   /* NOOP  */
#define NI_QTYPE_SUPTYPES       1   /* Supported Qtypes (Obso) */
#define NI_QTYPE_NODENAME       2   /* Node Name */
#define NI_QTYPE_NODEADDR       3   /* Node Addresses */
#define NI_QTYPE_IPV4ADDR       4   /* IPv4 Addresses */

static const value_string ni_query_code_val[] = {
    { ICMP6_NI_SUBJ_IPV6,   "Query subject = IPv6 addresses" },
    { ICMP6_NI_SUBJ_FQDN,   "Query subject = DNS name or empty" },
    { ICMP6_NI_SUBJ_IPV4,   "Query subject = IPv4 addresses" },
    { 0, NULL }
};

static const value_string ni_reply_code_val[] = {
    { ICMP6_NI_SUCCESS,   "Successful" },
    { ICMP6_NI_REFUSED,   "Refused" },
    { ICMP6_NI_UNKNOWN,   "Unknown query type" },
    { 0, NULL }
};
static const value_string ni_qtype_val[] = {
    { NI_QTYPE_NOOP,            "NOOP" },
    { NI_QTYPE_SUPTYPES,        "Supported query types (Obsolete)" },
    { NI_QTYPE_NODENAME,        "Node Name" },
    { NI_QTYPE_NODEADDR,        "Node addresses" },
    { NI_QTYPE_IPV4ADDR,        "IPv4 node addresses" },
    { 0,                        NULL }
};

#define NI_FLAG_G       0x0020
#define NI_FLAG_S       0x0010
#define NI_FLAG_L       0x0008
#define NI_FLAG_C       0x0004
#define NI_FLAG_A       0x0002
#define NI_FLAG_T       0x0001
#define NI_FLAG_RSV     0xFFC0

static const true_false_string tfs_ni_flag_a = {
    "All unicast address",
    "Unicast addresses on the queried interface"
};

#define ND_OPT_SOURCE_LINKADDR           1
#define ND_OPT_TARGET_LINKADDR           2
#define ND_OPT_PREFIX_INFORMATION        3
#define ND_OPT_REDIRECTED_HEADER         4
#define ND_OPT_MTU                       5
#define ND_OPT_NBMA                      6
#define ND_OPT_ADVINTERVAL               7
#define ND_OPT_HOMEAGENT_INFO            8
#define ND_OPT_SOURCE_ADDRLIST           9
#define ND_OPT_TARGET_ADDRLIST          10
#define ND_OPT_CGA                      11
#define ND_OPT_RSA                      12
#define ND_OPT_TIMESTAMP                13
#define ND_OPT_NONCE                    14
#define ND_OPT_TRUST_ANCHOR             15
#define ND_OPT_CERTIFICATE              16
#define ND_OPT_IP_ADDRESS_PREFIX        17
#define ND_OPT_NEW_ROUTER_PREFIX_INFO   18
#define ND_OPT_LINK_LAYER_ADDRESS       19
#define ND_OPT_NEIGHBOR_ADV_ACK         20
#define ND_OPT_PVD_ID                   21
#define ND_OPT_MAP                      23
#define ND_OPT_ROUTE_INFO               24
#define ND_OPT_RECURSIVE_DNS_SERVER     25
#define ND_OPT_FLAGS_EXTENSION          26
#define ND_OPT_HANDOVER_KEY_REQUEST     27
#define ND_OPT_HANDOVER_KEY_REPLY       28
#define ND_OPT_HANDOVER_ASSIST_INFO     29
#define ND_OPT_MOBILE_NODE_ID           30
#define ND_OPT_DNS_SEARCH_LIST          31
#define ND_OPT_PROXY_SIGNATURE          32
#define ND_OPT_ADDR_REGISTRATION        33
#define ND_OPT_6LOWPAN_CONTEXT          34
#define ND_OPT_AUTH_BORDER_ROUTER       35
#define ND_OPT_6CIO                     36
#define ND_OPT_CAPPORT                  37
#define ND_OPT_PREF64                   38
#define ND_OPT_CRYPTOID_PARAMETERS      39
#define ND_OPT_NDP_SIGNATURE            40
#define ND_OPT_RESOURCE_DIR_ADDRESS     41
#define ND_OPT_CONSISTENT_UPTIME        42
#define ND_OPT_ENCRYPTED_DNS           144

static const value_string option_vals[] = {
/*  1 */   { ND_OPT_SOURCE_LINKADDR,           "Source link-layer address" },
/*  2 */   { ND_OPT_TARGET_LINKADDR,           "Target link-layer address" },
/*  3 */   { ND_OPT_PREFIX_INFORMATION,        "Prefix information" },
/*  4 */   { ND_OPT_REDIRECTED_HEADER,         "Redirected header" },
/*  5 */   { ND_OPT_MTU,                       "MTU" },
/*  6 */   { ND_OPT_NBMA,                      "NBMA Shortcut Limit Option" },             /* [RFC2491] */
/*  7 */   { ND_OPT_ADVINTERVAL,               "Advertisement Interval" },                 /* [RFC6275] */
/*  8 */   { ND_OPT_HOMEAGENT_INFO,            "Home Agent Information" },                 /* [RFC6275] */
/*  9 */   { ND_OPT_SOURCE_ADDRLIST,           "Source Address List" },                    /* [RFC3122] */
/* 10 */   { ND_OPT_TARGET_ADDRLIST,           "Target Address List" },                    /* [RFC3122] */
/* 11 */   { ND_OPT_CGA,                       "CGA" },                                    /* [RFC3971] */
/* 12 */   { ND_OPT_RSA,                       "RSA Signature" },                          /* [RFC3971] */
/* 13 */   { ND_OPT_TIMESTAMP,                 "Timestamp" },                              /* [RFC3971] */
/* 14 */   { ND_OPT_NONCE,                     "Nonce" },                                  /* [RFC3971] */
/* 15 */   { ND_OPT_TRUST_ANCHOR,              "Trust Anchor" },                           /* [RFC3971] */
/* 16 */   { ND_OPT_CERTIFICATE,               "Certificate" },                            /* [RFC3971] */
/* 17 */   { ND_OPT_IP_ADDRESS_PREFIX,         "IP Address/Prefix Option" },               /* [RFC5568] */
/* 18 */   { ND_OPT_NEW_ROUTER_PREFIX_INFO,    "New Router Prefix Information" },          /* [RFC4068] OBSO */
/* 19 */   { ND_OPT_LINK_LAYER_ADDRESS,        "Link-layer Address" },                     /* [RFC5568] */
/* 20 */   { ND_OPT_NEIGHBOR_ADV_ACK,          "Neighbor Advertisement Acknowledgment" },  /* [RFC5568] */
/* 21 */   { ND_OPT_PVD_ID,                    "PvD ID" },                                 /* [RFC8801] */
/* 22   Unassigned */
/* 23 */   { ND_OPT_MAP,                       "MAP" },                                    /* [RFC4140] */
/* 24 */   { ND_OPT_ROUTE_INFO,                "Route Information" },                      /* [RFC4191] */
/* 25 */   { ND_OPT_RECURSIVE_DNS_SERVER,      "Recursive DNS Server" },                   /* [RFC6106] */
/* 26 */   { ND_OPT_FLAGS_EXTENSION,           "RA Flags Extension" },                     /* [RFC5175] */
/* 27 */   { ND_OPT_HANDOVER_KEY_REQUEST,      "Handover Key Request" },                   /* [RFC5269] */
/* 28 */   { ND_OPT_HANDOVER_KEY_REPLY,        "Handover Key Reply" },                     /* [RFC5269] */
/* 29 */   { ND_OPT_HANDOVER_ASSIST_INFO,      "Handover Assist Information" },            /* [RFC5271] */
/* 30 */   { ND_OPT_MOBILE_NODE_ID,            "Mobile Node Identifier Option" },          /* [RFC5271] */
/* 31 */   { ND_OPT_DNS_SEARCH_LIST,           "DNS Search List Option" },                 /* [RFC6106] */
/* 32 */   { ND_OPT_PROXY_SIGNATURE,           "Proxy Signature (PS)" },                   /* [RFC6496] */
/* 33 */   { ND_OPT_ADDR_REGISTRATION,         "Address Registration Option" },            /* [RFC6775] */
/* 34 */   { ND_OPT_6LOWPAN_CONTEXT,           "6LoWPAN Context Option" },                 /* [RFC6775] */
/* 35 */   { ND_OPT_AUTH_BORDER_ROUTER,        "Authoritative Border Router" },            /* [RFC6775] */
/* 36 */   { ND_OPT_6CIO,                      "6LoWPAN Capability Indication Option" },   /* [RFC7400] */
/* 37 */   { ND_OPT_CAPPORT,                   "DHCP Captive-Portal" },                    /* [RFC7710] */
/* 38 */   { ND_OPT_PREF64,                    "PREF64 Option" },                          /* [RFC8781] */
/* 39 */   { ND_OPT_CRYPTOID_PARAMETERS,       "Crypto-ID Parameters Option (CIPO)" },     /* [RFC8928] */
/* 40 */   { ND_OPT_NDP_SIGNATURE,             "NDP Signature Option (NDPSO)" },           /* [RFC8928] */
/* 41 */   { ND_OPT_RESOURCE_DIR_ADDRESS,      "Resource Directory Address Option" },      /* [RFC9176] */
/* 42 */   { ND_OPT_CONSISTENT_UPTIME,         "Consistent Uptime Option" },               /* [RFC-ietf-6lo-multicast-registration-19] */
/* 43-137  Unassigned */
   { 138,                              "CARD Request" },                           /* [RFC4065] */
   { 139,                              "CARD Reply" },                             /* [RFC4065] */
/* 140-143 Unassigned */
/* 144 */  { ND_OPT_ENCRYPTED_DNS,             "Encrypted DNS Option" },                   /* [RFC9463] */
/* 145-252 Unassigned */
   { 253,                              "RFC3692-style Experiment 1" },             /* [RFC4727] */
   { 254,                              "RFC3692-style Experiment 2" },             /* [RFC4727] */
   { 0,                                NULL }
};

#define ND_RA_FLAG_M    0x80
#define ND_RA_FLAG_O    0x40
#define ND_RA_FLAG_H    0x20
#define ND_RA_FLAG_PRF  0x18
#define ND_RA_FLAG_P    0x04
#define ND_RA_FLAG_S    0x02
#define ND_RA_FLAG_RSV  0x01

#define ND_NA_FLAG_R    0x80000000
#define ND_NA_FLAG_S    0x40000000
#define ND_NA_FLAG_O    0x20000000
#define ND_NA_FLAG_RSV  0x1FFFFFFF

static const value_string nd_flag_router_pref[] = {
    { 0, "Medium" },
    { 1, "High" },
    { 2, "Reserved" },
    { 3, "Low" },
    { 0, NULL}
};

static const value_string nd_opt_ipa_option_code_val[] = {
    { 1, "Old Care-of Address" },
    { 2, "New Care-of Address" },
    { 3, "NAR's IP address" },
    { 4, "NAR's Prefix (sent in PrRtAdv)" },
    { 0, NULL }
};

static const value_string nd_opt_lla_option_code_val[] = {
    { 0, "Wildcard" },
    { 1, "Link-layer Address of the New Access Point" },
    { 2, "Link-layer Address of the MN" },
    { 3, "Link-layer Address of the NAR" },
    { 4, "Link-layer Address of the source" },
    { 5, "The AP belongs to the current interface of the router" },
    { 6, "No prefix information available" },
    { 7, "No fast handovers support available" },
    { 0, NULL }
};

static const value_string nd_opt_hai_option_code_val[] = {
    { 1, "Access Network Identifier (AN ID)" },
    { 2, "Sector ID" },
    { 0, NULL }
};

static const value_string nd_opt_mn_option_code_val[] = {
    { 1, "NAI" },
    { 2, "IMSI" },
    { 0, NULL }
};
static const value_string nd_opt_naack_status_val[] = {
    { 1,    "New CoA is invalid, perform address configuration" },
    { 2,    "New CoA is invalid, use the supplied CoA" },
    { 3,    "NCoA is invalid, use NAR's IP address as NCoA in FBU" },
    { 4,    "PCoA supplied, do not send FBU" },
    { 128,  "LLA is unrecognized" },
    { 0,    NULL }
};

static const value_string nd_opt_earo_status_val[] = {
    { 0,  "Success" },
    { 1,  "Duplicate Address" },
    { 2,  "Neighbor Cache Full" },
    { 3,  "Moved" },
    { 4,  "Removed" },
    { 5,  "Validation Requested" },
    { 6,  "Duplicate Source Address" },
    { 7,  "Invalid Source Address" },
    { 8,  "Registered Address Topologically Incorrect" },
    { 9,  "6LBR Registry Saturated" },
    { 10, "Validation Failed" },
    { 11, "Registration Refresh Request" },
    { 12, "Invalid Registration" },
    { 0,  NULL }
};

#define ND_OPT_EARO_FLAG_RESERVED 0x80
#define ND_OPT_EARO_FLAG_C        0x40
#define ND_OPT_EARO_FLAG_P        0x30
#define ND_OPT_EARO_FLAG_I        0x0C
#define ND_OPT_EARO_FLAG_R        0x02
#define ND_OPT_EARO_FLAG_T        0x01

static const value_string nd_opt_earo_p_val[] = {
    { 0, "Unicast Address" },
    { 1, "Multicast Address" },
    { 2, "Anycast Address" },
    { 3, "Unicast Prefix" },
    { 0, NULL }
};

static const value_string nd_opt_earo_i_val[] = {
    { 0, "Default" },
    { 0, NULL }
};

#define ND_OPT_6CO_FLAG_C        0x10
#define ND_OPT_6CO_FLAG_CID      0x0F
#define ND_OPT_6CO_FLAG_RESERVED 0xE0

static const value_string nd_opt_da_status_val[] = {
    { 0, "Success" },
    { 1, "Duplicate Address" },
    { 2, "Neighbor Cache Full" },
    { 0, NULL }
};

#define ND_OPT_DA_DA      0
#define ND_OPT_DA_EDA_64  1
#define ND_OPT_DA_EDA_128 2
#define ND_OPT_DA_EDA_192 3
#define ND_OPT_DA_EDA_256 4

static const value_string nd_opt_dar_code_suffix_val[] = {
    { ND_OPT_DA_DA,      "DAR message" },
    { ND_OPT_DA_EDA_64,  "EDAR message with 64-bit ROVR field" },
    { ND_OPT_DA_EDA_128, "EDAR message with 128-bit ROVR field" },
    { ND_OPT_DA_EDA_192, "EDAR message with 192-bit ROVR field" },
    { ND_OPT_DA_EDA_256, "EDAR message with 256-bit ROVR field" },
    { 0,                  NULL }
};

static const value_string nd_opt_dac_code_suffix_val[] = {
    { ND_OPT_DA_DA,      "DAC message" },
    { ND_OPT_DA_EDA_64,  "EDAC message with 64-bit ROVR field" },
    { ND_OPT_DA_EDA_128, "EDAC message with 128-bit ROVR field" },
    { ND_OPT_DA_EDA_192, "EDAC message with 192-bit ROVR field" },
    { ND_OPT_DA_EDA_256, "EDAC message with 256-bit ROVR field" },
    { 0,                  NULL }
};

static const value_string icmpv6_option_name_type_vals[] = {
    { 1,    "DER Encoded X.501 Name" },
    { 2,    "FQDN" },
    { 3,    "SHA-1 Subject Key Identifier (SKI)" },
    { 4,    "SHA-224 Subject Key Identifier (SKI)" },
    { 5,    "SHA-256 Subject Key Identifier (SKI)" },
    { 6,    "SHA-384 Subject Key Identifier (SKI)" },
    { 7,    "SHA-512 Subject Key Identifier (SKI)" },
    { 253,  "Reserved for Experimental Use" },
    { 254,  "Reserved for Experimental Use" },
    { 255,  "Reserved" },
    { 0,    NULL }
};

static const value_string icmpv6_option_cert_type_vals[] = {
    { 1,    "X.509v3 Certificate" },
    { 0,    NULL }
};

/* RFC 4191: Default Router Preferences and More-Specific Routes  */

#define ND_RA_FLAG_RTPREF_MASK  0x18 /* 00011000 */
#define ND_RA_FLAG_RESERV_MASK  0xE7 /* 11100111 */

/* RFC 5175 : IPv6 Router Advertisement Flags Expansion Option */
#define FLAGS_EO_RSV    0xFFFFFFFFFFFC
#define FLAGS_EO_PEX    0x000000000003

/* RFC 6275: Mobility Support in IPv6 */
#define FLAGS_MIP6_M   0x8000
#define FLAGS_MIP6_O   0x4000
#define FLAGS_MIP6_RSV 0x3FFF

/* RPL: RFC 6550 : Routing over Low-Power and Lossy Networks. */
/* RPL ICMPv6 Codes */
#define ICMP6_RPL_DIS           0x00   /* DODAG Information Solicitation */
#define ICMP6_RPL_DIO           0x01   /* DODAG Information Object */
#define ICMP6_RPL_DAO           0x02   /* Destination Advertisement Object */
#define ICMP6_RPL_DAOACK        0x03   /* Destination Advertisement Object Ack */
#define ICMP6_RPL_DCO           0x07   /* Destination Cleanup Object */
#define ICMP6_RPL_DCOACK        0x08   /* Destination Cleanup Object Acknowledgement */
#define ICMP6_RPL_P2P_DRO       0x04   /* P2P Discovery Reply Object */
#define ICMP6_RPL_P2P_DROACK    0x05   /* P2P Discovery Reply Object Acknowledgement */
#define ICMP6_RPL_SDIS          0x80   /* Secure DODAG Information Solicitation */
#define ICMP6_RPL_SDIO          0x81   /* Secure DODAG Information Object */
#define ICMP6_RPL_SDAO          0x82   /* Secure Destination Advertisement Object */
#define ICMP6_RPL_SDAOACK       0x83   /* Secure Destination Advertisement Object Ack */
#define ICMP6_RPL_P2P_SDRO      0x84   /* Secure P2P Discovery Reply Object */
#define ICMP6_RPL_P2P_SDROACK   0x85   /* Secure P2P Discovery Reply Object Acknowledgement */
#define ICMP6_RPL_CC            0x8A   /* Consistency Check */


/* RPL DIO Flags */
#define RPL_DIO_FLAG_G           0x80
#define RPL_DIO_FLAG_0           0x40
#define RPL_DIO_FLAG_MOP         0x38
#define RPL_DIO_FLAG_PRF         0x07

/* RPL DAO Flags */
#define RPL_DAO_FLAG_K                  0x80
#define RPL_DAO_FLAG_D                  0x40
#define RPL_DAO_FLAG_RESERVED           0x3F

/* RPL DAO ACK Flags */
#define RPL_DAOACK_FLAG_D               0x80
#define RPL_DAOACK_FLAG_RESERVED        0x7F

/* RPL DCO Flags */
#define RPL_DCO_FLAG_K                  0x80
#define RPL_DCO_FLAG_D                  0x40
#define RPL_DCO_FLAG_RESERVED           0x3F

/* RPL DCO ACK Flags */
#define RPL_DCOACK_FLAG_D               0x80
#define RPL_DCOACK_FLAG_RESERVED        0x7F

/* RPL CC Flags */
#define RPL_CC_FLAG_R               0x80
#define RPL_CC_FLAG_RESERVED        0x7F

/* RPL Secure */
#define ICMP6_RPL_SECURE    0x80

#define RPL_SECURE_FLAG_T   0x80
#define RPL_SECURE_FLAG_RSV 0x7F

#define RPL_SECURE_LVL      0x07
#define RPL_SECURE_KIM      0xC0
#define RPL_SECURE_RSV      0x38

/* RPL P2P DRO Flags */
#define RPL_P2P_DRO_FLAG_S      0x8000
#define RPL_P2P_DRO_FLAG_A      0x4000
#define RPL_P2P_DRO_FLAG_SEQ    0x3000
#define RPL_P2P_DRO_FLAG_RSV    0x0FFF

/* RPL P2P DROACK Flags */
#define RPL_P2P_DROACK_FLAG_SEQ    0xc000
#define RPL_P2P_DROACK_FLAG_RSV    0x3FFF

/* RPL Option Bitfields */
#define RPL_OPT_PREFIX_FLAG_L           0x80
#define RPL_OPT_PREFIX_FLAG_A           0x40
#define RPL_OPT_PREFIX_FLAG_R           0x20
#define RPL_OPT_PREFIX_FLAG_RSV         0x1F
#define RPL_OPT_ROUTE_PREFERENCE        0x18
#define RPL_OPT_ROUTE_RESERVED          0xE7
#define RPL_OPT_CONFIG_FLAG_AUTH        0x08
#define RPL_OPT_CONFIG_FLAG_PCS         0x07
#define RPL_OPT_CONFIG_FLAG_RESERVED    0xF0
#define RPL_OPT_TRANSIT_FLAG_E          0x80
#define RPL_OPT_TRANSIT_FLAG_I          0x40
#define RPL_OPT_TRANSIT_FLAG_RSV        0x3F
#define RPL_OPT_TRANSIT_PATHCTL_PC1     0xC0
#define RPL_OPT_TRANSIT_PATHCTL_PC2     0x30
#define RPL_OPT_TRANSIT_PATHCTL_PC3     0x0C
#define RPL_OPT_TRANSIT_PATHCTL_PC4     0x03
#define RPL_OPT_SOLICITED_FLAG_V        0x80
#define RPL_OPT_SOLICITED_FLAG_I        0x40
#define RPL_OPT_SOLICITED_FLAG_D        0x20
#define RPL_OPT_SOLICITED_FLAG_RSV      0x1F
#define RPL_OPT_ROUTE_DISCOVERY_R       0x80
#define RPL_OPT_ROUTE_DISCOVERY_H       0x40
#define RPL_OPT_ROUTE_DISCOVERY_N       0x30
#define RPL_OPT_ROUTE_DISCOVERY_COMPR   0x0F
#define RPL_OPT_ROUTE_DISCOVERY_L       0xC0
#define RPL_OPT_ROUTE_DISCOVERY_MR_NH   0x3F

/* RPL Metric Bitfields */
#define RPL_METRIC_RESERVED              0xF800
#define RPL_METRIC_FLAG_P                0x0400
#define RPL_METRIC_FLAG_C                0x0200
#define RPL_METRIC_FLAG_O                0x0100
#define RPL_METRIC_FLAG_R                0x0080
#define RPL_METRIC_A                     0x0070
#define RPL_METRIC_PREC                  0x000F
#define RPL_METRIC_NSA_OBJECT_RESERVED   0xFF00
#define RPL_METRIC_NSA_OBJECT_FLAGS      0x00FC
#define RPL_METRIC_NSA_OBJECT_FLAG_A     0x0002
#define RPL_METRIC_NSA_OBJECT_FLAG_O     0x0001
#define RPL_METRIC_NE_OBJECT_FLAGS       0xF000
#define RPL_METRIC_NE_OBJECT_FLAG_I      0x0800
#define RPL_METRIC_NE_OBJECT_TYPE        0x0600
#define RPL_METRIC_NE_OBJECT_FLAG_E      0x0100
#define RPL_METRIC_NE_OBJECT_ENERGY      0x00FF
#define RPL_METRIC_HP_OBJECT_RESERVED    0xF000
#define RPL_METRIC_HP_OBJECT_FLAGS       0x0F00
#define RPL_METRIC_HP_OBJECT_HP          0x00FF
#define RPL_METRIC_LQL_OBJECT_RES        0xFF
#define RPL_METRIC_LQL_OBJECT_VAL        0xE0
#define RPL_METRIC_LQL_OBJECT_COUNTER    0x1F
#define RPL_METRIC_LC_OBJECT_RES         0xFF
#define RPL_METRIC_LC_OBJECT_LC          0xFFC0
#define RPL_METRIC_LC_OBJECT_COUNTER     0x003F
#define RPL_METRIC_LC_OBJECT_RESERVED    0x003E
#define RPL_METRIC_LC_OBJECT_FLAG_I      0x0001

static const value_string rpl_dio_map_val[] = {
    { 0, "No Downward routes maintained by RPL" },
    { 1, "Non-Storing Mode of Operation" },
    { 2, "Storing Mode of Operation with no multicast support" },
    { 3, "Storing Mode of Operation with multicast support" },
    { 4, "P2P Route Discovery Mode of Operation" },
    { 0, NULL }
};
static const value_string rpl_code_val[] = {
    { ICMP6_RPL_DIS,        "DODAG Information Solicitation" },
    { ICMP6_RPL_DIO,        "DODAG Information Object" },
    { ICMP6_RPL_DAO,        "Destination Advertisement Object" },
    { ICMP6_RPL_DAOACK,     "Destination Advertisement Object Acknowledgment" },
    { ICMP6_RPL_DCO,        "Destination Cleanup Object" },
    { ICMP6_RPL_DCOACK,     "Destination Cleanup Object Acknowledgment" },
    { ICMP6_RPL_SDIS,       "Secure DODAG Information Solicitation" },
    { ICMP6_RPL_SDIO,       "Secure DODAG Information Object" },
    { ICMP6_RPL_SDAO,       "Secure Destination Advertisement Object" },
    { ICMP6_RPL_SDAOACK,    "Secure Destination Advertisement Object Acknowledgment" },
    { ICMP6_RPL_CC,         "Consistency Check" },
    { ICMP6_RPL_P2P_DRO,    "P2P Discovery Reply Object" },
    { ICMP6_RPL_P2P_SDRO,   "P2P Secure Discovery Reply Object" },
    { ICMP6_RPL_P2P_DROACK, "P2P Discovery Reply Object Acknowledgement" },
    { ICMP6_RPL_P2P_SDROACK,"P2P Secure Discovery Reply Object Acknowledgement" },
    { 0, NULL }
};

static const value_string rpl_secure_algorithm_vals[] = {
    { 0, "Encryption: CCM with AES-128 / Signature: RSA with SHA-256" },
    { 0, NULL }
};

/* RPL Option Types */
/* Pending IANA Assignment */
#define RPL_OPT_PAD1            0   /* 1-byte padding */
#define RPL_OPT_PADN            1   /* n-byte padding */
#define RPL_OPT_METRIC          2   /* DAG metric container */
#define RPL_OPT_ROUTING         3   /* Routing Information */
#define RPL_OPT_CONFIG          4   /* DAG configuration */
#define RPL_OPT_TARGET          5   /* RPL Target */
#define RPL_OPT_TRANSIT         6   /* Transit */
#define RPL_OPT_SOLICITED       7   /* Solicited Information */
#define RPL_OPT_PREFIX          8   /* Destination prefix */
#define RPL_OPT_TARGETDESC      9   /* RPL Target Descriptor */
#define RPL_OPT_ROUTE_DISCOVERY 10  /* P2P Route Discovery */

static const value_string rpl_option_vals[] = {
    { RPL_OPT_PAD1,             "1-byte padding" },
    { RPL_OPT_PADN,             "n-byte padding" },
    { RPL_OPT_METRIC,           "DAG Metric container" },
    { RPL_OPT_ROUTING,          "Routing Information"},
    { RPL_OPT_CONFIG,           "DODAG configuration" },
    { RPL_OPT_TARGET,           "RPL Target" },
    { RPL_OPT_TRANSIT,          "Transit Information" },
    { RPL_OPT_SOLICITED,        "Solicited Information"},
    { RPL_OPT_PREFIX,           "Prefix Information"},
    { RPL_OPT_TARGETDESC,       "RPL Target Descriptor"},
    { RPL_OPT_ROUTE_DISCOVERY,  "P2P Route Discovery"},
    { 0, NULL }
};

/* RPL Metric Types */
/* RFC 6551 */
#define RPL_METRIC_NSA 1  /* Node State and Attribute */
#define RPL_METRIC_NE  2  /* Node Energy */
#define RPL_METRIC_HP  3  /* Hop Count */
#define RPL_METRIC_LT  4  /* Link Throughput */
#define RPL_METRIC_LL  5  /* Link Latency */
#define RPL_METRIC_LQL 6  /* Link Quality Level */
#define RPL_METRIC_ETX 7  /* Link ETX */
#define RPL_METRIC_LC  8  /* Link Color */

static const value_string rpl_metric_vals[] = {
  { RPL_METRIC_NSA,  "Node State and Attribute" },
  { RPL_METRIC_NE,   "Node Energy" },
  { RPL_METRIC_HP,   "Hop Count" },
  { RPL_METRIC_LT,   "Link Throughput" },
  { RPL_METRIC_LL,   "Link Latency" },
  { RPL_METRIC_LQL,  "Link Quality Level" },
  { RPL_METRIC_ETX,  "Link ETX" },
  { RPL_METRIC_LC,   "Link Color" },
  { 0, NULL }
};

static const value_string rpl_ocp_vals[] = {
    { 0, "Objective Function Zero (OF0)" },
    { 1, "Minimum Rank with Hysteresis Objective Function (MRHOF)" },
    { 0, NULL }
};

/* RFC 7400, 8505, 8928, 9685, 9926 */
#define ND_OPT_6CIO_FLAG_RESERVED     0x00007FFFFFFF
#define ND_OPT_6CIO_FLAG_F            0x000080000000
#define ND_OPT_6CIO_FLAG_G            0x000100000000
#define ND_OPT_6CIO_FLAG_E            0x000200000000
#define ND_OPT_6CIO_FLAG_P            0x000400000000
#define ND_OPT_6CIO_FLAG_B            0x000800000000
#define ND_OPT_6CIO_FLAG_L            0x001000000000
#define ND_OPT_6CIO_FLAG_D            0x002000000000
#define ND_OPT_6CIO_FLAG_A            0x004000000000
#define ND_OPT_6CIO_FLAG_X            0x008000000000
#define ND_OPT_6CIO_FLAG_EXPERIMENTAL 0xFF0000000000

/* RFC 7731 */
#define MPL_SEED_INFO_BM_LEN        0xFC
#define MPL_SEED_INFO_S             0x03
static const value_string mpl_seed_id_lengths[] = {
    { 0, "0 bit, not included in MPL Seed Info" },
    { 1, "16 bits" },
    { 2, "64 bits" },
    { 3, "128 bits" },
    { 0, NULL}
};
static const uint8_t mpl_seed_id_code_to_length[] = { 0, 2, 8, 16 }; /* bytes */

#define LIFETIME_INFINITY 0xFFFFFFFF

static const value_string unique_infinity[] = {
    { LIFETIME_INFINITY, "Infinity" },
    { 0, NULL}
};

static const value_string dnssl_infinity[] = {
    { 0, "DNSSL domain name MUST no longer be used" },
    { LIFETIME_INFINITY, "Infinity" },
    { 0, NULL}
};

static const value_string rdnss_infinity[] = {
    { 0, "RDNSS address MUST no longer be used" },
    { LIFETIME_INFINITY, "Infinity" },
    { 0, NULL}
};

static const value_string ext_echo_req_code_str[] = {
    { 0, "No error"},
    { 0, NULL}
};

static const value_string ext_echo_reply_code_str[] = {
    { 0, "No error"},
    { 1, "Malformed Query"},
    { 2, "No Such Interface"},
    { 3, "No Such Table Entry"},
    { 4, "Multiple Interfaces Satisfy Query"},
    { 0, NULL}
    };

static const value_string ext_echo_reply_state_str[] = {
    { 0, "Reserved"},
    { 1, "Incomplete"},
    { 2, "Reachable"},
    { 3, "Stale"},
    { 4, "Delay"},
    { 5, "Probe"},
    { 6, "Failed"},
    { 0, NULL}
    };


/* RFC 8781 */
#define ND_OPT_PREF64_SL          0xFFF8
#define ND_OPT_PREF64_PLC         0x0007

static const value_string pref64_plc_str[] = {
    { 0, "96 bits prefix length"},
    { 1, "64 bits prefix length"},
    { 2, "56 bits prefix length"},
    { 3, "48 bits prefix length"},
    { 4, "40 bits prefix length"},
    { 5, "32 bits prefix length"},
    { 0, NULL}
    };

/* whenever a ICMPv6 packet is seen by the tap listener */
/* Add a new frame into the graph */
static tap_packet_status
icmpv6_seq_analysis_packet( void *ptr, packet_info *pinfo, epan_dissect_t *edt _U_, const void *dummy _U_, tap_flags_t flags _U_)
{
    seq_analysis_info_t *sainfo = (seq_analysis_info_t *) ptr;
    seq_analysis_item_t *sai = sequence_analysis_create_sai_with_addresses(pinfo, sainfo);

    if (!sai)
        return TAP_PACKET_DONT_REDRAW;

    sai->frame_number = pinfo->num;

    sequence_analysis_use_color_filter(pinfo, sai);

    sai->port_src=pinfo->srcport;
    sai->port_dst=pinfo->destport;

    sequence_analysis_use_col_info_as_label_comment(pinfo, sai);

    if (pinfo->ptype == PT_NONE) {
        icmp_info_t *p_icmp_info = (icmp_info_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_icmpv6, 0);

        if (p_icmp_info != NULL) {
            sai->port_src = 0;
            sai->port_dst = p_icmp_info->type * 256 + p_icmp_info->code;
        }
    }

    sai->line_style = 1;
    sai->conv_num = 0;
    sai->display = true;

    g_queue_push_tail(sainfo->items, sai);

    return TAP_PACKET_REDRAW;
}


static int
dissect_contained_icmpv6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
    bool      save_in_error_pkt;
    int offset;

    /* Save the current value of the "we're inside an error packet"
       flag, and set that flag; subdissectors may treat packets
       that are the payload of error packets differently from
       "real" packets. */
    save_in_error_pkt = pinfo->flags.in_error_pkt;
    pinfo->flags.in_error_pkt = true;

    /* tiny sanity check */
    if ((tvb_get_uint8(tvb, 0) & 0xf0) == 0x60) {
        /* The contained packet is an IPv6 datagram; dissect it. */
        offset = call_dissector(ipv6_handle, tvb, pinfo, tree);
    } else {
        offset = call_data_dissector(tvb, pinfo, tree);
    }

    /* Restore the "we're inside an error packet" flag. */
    pinfo->flags.in_error_pkt = save_in_error_pkt;

    return offset;
}


/* ======================================================================= */
static conversation_t *_find_or_create_conversation(packet_info *pinfo)
{
    conversation_t *conv = NULL;

    /* Have we seen this conversation before? */
    conv = find_conversation(pinfo->num, &pinfo->src, &pinfo->dst,
        conversation_pt_to_conversation_type(pinfo->ptype), 0, 0, 0);
    if (conv == NULL) {
        /* No, this is a new conversation. */
        conv = conversation_new(pinfo->num, &pinfo->src, &pinfo->dst,
            conversation_pt_to_conversation_type(pinfo->ptype), 0, 0, 0);
    }
    return conv;
}

/* ======================================================================= */
/*
    Note: We are tracking conversations via these keys:

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                             |G|            Checksum           |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |           Identifier          |        Sequence Number        |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                            VLAN ID                            |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
static icmp_transaction_t *transaction_start(packet_info *pinfo, proto_tree *tree, uint32_t *key)
{
    conversation_t     *conversation;
    icmpv6_conv_info_t *icmpv6_info;
    icmp_transaction_t *icmpv6_trans;
    wmem_tree_key_t     icmpv6_key[3];
    proto_item         *it;

    /* Handle the conversation tracking */
    conversation = _find_or_create_conversation(pinfo);
    icmpv6_info = (icmpv6_conv_info_t *)conversation_get_proto_data(conversation, proto_icmpv6);
    if (icmpv6_info == NULL) {
        icmpv6_info = wmem_new(wmem_file_scope(), icmpv6_conv_info_t);
        icmpv6_info->unmatched_pdus = wmem_tree_new(wmem_file_scope());
        icmpv6_info->matched_pdus = wmem_tree_new(wmem_file_scope());
        conversation_add_proto_data(conversation, proto_icmpv6, icmpv6_info);
    }

    if (!PINFO_FD_VISITED(pinfo)) {
        /*
         * This is a new request, create a new transaction structure and map it
         * to the unmatched table.
         */
        icmpv6_key[0].length = 3;
        icmpv6_key[0].key = key;
        icmpv6_key[1].length = 0;
        icmpv6_key[1].key = NULL;

        icmpv6_trans = wmem_new(wmem_file_scope(), icmp_transaction_t);
        icmpv6_trans->rqst_frame = pinfo->num;
        icmpv6_trans->resp_frame = 0;
        icmpv6_trans->rqst_time = pinfo->abs_ts;
        nstime_set_zero(&icmpv6_trans->resp_time);
        wmem_tree_insert32_array(icmpv6_info->unmatched_pdus, icmpv6_key, (void *)icmpv6_trans);
    } else {
        /* Already visited this frame */
        uint32_t frame_num = pinfo->num;

        icmpv6_key[0].length = 3;
        icmpv6_key[0].key = key;
        icmpv6_key[1].length = 1;
        icmpv6_key[1].key = &frame_num;
        icmpv6_key[2].length = 0;
        icmpv6_key[2].key = NULL;

        icmpv6_trans = (icmp_transaction_t *)wmem_tree_lookup32_array(icmpv6_info->matched_pdus, icmpv6_key);
    }

    if (icmpv6_trans == NULL) {
        if (pinfo->dst.type == AT_IPv6 &&
                    in6_addr_is_multicast((const ws_in6_addr *)pinfo->dst.data)) {
            /* XXX We should support multicast echo requests, but we don't currently */
            /* Note the multicast destination and skip transaction tracking */
            col_append_str(pinfo->cinfo, COL_INFO, " (multicast)");
        } else if (PINFO_FD_VISITED(pinfo)) {
            /* No response found - add field and expert info */
            it = proto_tree_add_item(tree, hf_icmpv6_no_resp, NULL, 0, 0,
                                     ENC_NA);
            proto_item_set_generated(it);

            col_append_str(pinfo->cinfo, COL_INFO, " (no response found!)");

            /* Expert info.  TODO: add to _icmp_transaction_t type and sequence number
               so can report here (and in taps) */
            expert_add_info_format(pinfo, it, &ei_icmpv6_resp_not_found,
                                   "No response seen to ICMPv6 request in frame %u",
                                   pinfo->num);
        }

        return NULL;
    }

    /* Print state tracking in the tree */
    if (icmpv6_trans->resp_frame) {
        if (tree) {
            it = proto_tree_add_uint(tree, hf_icmpv6_resp_in, NULL, 0, 0,
                icmpv6_trans->resp_frame);
            proto_item_set_generated(it);
        }
        col_append_frame_number(pinfo, COL_INFO, " (reply in %d)", icmpv6_trans->resp_frame);
    }

    return icmpv6_trans;

} /* transaction_start() */

/* ======================================================================= */
static icmp_transaction_t *transaction_end(packet_info *pinfo, proto_tree *tree, uint32_t *key)
{
    conversation_t     *conversation;
    icmpv6_conv_info_t *icmpv6_info;
    icmp_transaction_t *icmpv6_trans;
    wmem_tree_key_t     icmpv6_key[3];
    proto_item         *it;
    nstime_t            ns;
    double resp_time;

    conversation = find_conversation(pinfo->num, &pinfo->src, &pinfo->dst,
        conversation_pt_to_conversation_type(pinfo->ptype), 0, 0, 0);
    if (conversation == NULL)
        return NULL;

    icmpv6_info = (icmpv6_conv_info_t *)conversation_get_proto_data(conversation, proto_icmpv6);
    if (icmpv6_info == NULL)
        return NULL;

    if (!PINFO_FD_VISITED(pinfo)) {
        uint32_t frame_num;

        icmpv6_key[0].length = 3;
        icmpv6_key[0].key = key;
        icmpv6_key[1].length = 0;
        icmpv6_key[1].key = NULL;

        icmpv6_trans = (icmp_transaction_t *)wmem_tree_lookup32_array(icmpv6_info->unmatched_pdus, icmpv6_key);
        if (icmpv6_trans == NULL)
            return NULL;

        /* we have already seen this response, or an identical one */
        if (icmpv6_trans->resp_frame != 0)
            return NULL;

        icmpv6_trans->resp_frame = pinfo->num;

        /*
         * we found a match.  Add entries to the matched table for both
         * request and reply frames
         */
        icmpv6_key[0].length = 3;
        icmpv6_key[0].key = key;
        icmpv6_key[1].length = 1;
        icmpv6_key[1].key = &frame_num;
        icmpv6_key[2].length = 0;
        icmpv6_key[2].key = NULL;

        frame_num = icmpv6_trans->rqst_frame;
        wmem_tree_insert32_array(icmpv6_info->matched_pdus, icmpv6_key, (void *)icmpv6_trans);

        frame_num = icmpv6_trans->resp_frame;
        wmem_tree_insert32_array(icmpv6_info->matched_pdus, icmpv6_key, (void *)icmpv6_trans);
    } else {
        /* Already visited this frame */
        uint32_t frame_num = pinfo->num;

        icmpv6_key[0].length = 3;
        icmpv6_key[0].key = key;
        icmpv6_key[1].length = 1;
        icmpv6_key[1].key = &frame_num;
        icmpv6_key[2].length = 0;
        icmpv6_key[2].key = NULL;

        icmpv6_trans = (icmp_transaction_t *)wmem_tree_lookup32_array(icmpv6_info->matched_pdus, icmpv6_key);
        if (icmpv6_trans == NULL)
            return NULL;
    }

    /* Print state tracking in the tree */
    if (tree) {
        it = proto_tree_add_uint(tree, hf_icmpv6_resp_to, NULL, 0, 0,
            icmpv6_trans->rqst_frame);
        proto_item_set_generated(it);
    }

    nstime_delta(&ns, &pinfo->abs_ts, &icmpv6_trans->rqst_time);
    icmpv6_trans->resp_time = ns;
    if (tree) {
        resp_time = nstime_to_msec(&ns);
        it = proto_tree_add_double_format_value(tree, hf_icmpv6_resptime, NULL,
            0, 0, resp_time, "%.3f ms", resp_time);
        proto_item_set_generated(it);
    }

    col_append_frame_number(pinfo, COL_INFO, " (request in %d)",
        icmpv6_trans->rqst_frame);

    return icmpv6_trans;

} /* transaction_end() */

// This is recursive, but we'll run out of PDU before we'll run out of stack.
// NOLINTNEXTLINE(misc-no-recursion)
static unsigned dissect_icmpv6_nd_opt(tvbuff_t *tvb, unsigned offset, packet_info *pinfo, proto_tree *tree, uint8_t icmpv6_type)
{
    proto_tree *icmp6opt_tree;
    proto_item *ti, *ti_opt, *ti_opt_len;
    uint8_t     opt_type;
    unsigned    opt_len;
    unsigned    opt_offset;
    tvbuff_t   *opt_tvb;
    unsigned    used_bytes;

    while (tvb_reported_length(tvb) > offset) {
        /* there are more options */

        /* ICMPv6 Option */
        opt_len = tvb_get_uint8(tvb, offset + 1) * 8;
        ti = proto_tree_add_item(tree, hf_icmpv6_opt, tvb, offset, opt_len, ENC_NA);
        icmp6opt_tree = proto_item_add_subtree(ti, ett_icmpv6_opt);
        opt_offset = offset;

        /* Option type */
        proto_tree_add_item_ret_uint8(icmp6opt_tree, hf_icmpv6_opt_type, tvb, opt_offset, 1, ENC_BIG_ENDIAN, &opt_type);
        opt_offset += 1;

        /* Add option name to option root label */
        proto_item_append_text(ti, " (%s", val_to_str(pinfo->pool, opt_type, option_vals, "Unknown %d"));

        /* Option length */
        ti_opt_len = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_length, tvb,opt_offset, 1, ENC_BIG_ENDIAN);
        opt_offset += 1;

        /* Add length value in bytes */
        proto_item_append_text(ti_opt_len, " (%i bytes)", opt_len);

        if(opt_len == 0){
            expert_add_info_format(pinfo, ti_opt_len, &ei_icmpv6_invalid_option_length, "Invalid option length (Zero)");
            return opt_offset;
        }

        /* decode... */
        switch (opt_type) {
            case ND_OPT_SOURCE_LINKADDR: /* Source Link-layer Address (1) */
            {
                const char *link_str;
                /* if the opt len is 8, the Link Addr is MAC Address */
                if(opt_len == 8){
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_linkaddr_mac, tvb, opt_offset, 6, ENC_NA);
                    ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_src_linkaddr_mac, tvb, opt_offset, 6, ENC_NA);
                    proto_item_set_hidden(ti_opt);

                    link_str = tvb_ether_to_str(pinfo->pool, tvb, opt_offset);
                    col_append_fstr(pinfo->cinfo, COL_INFO, " from %s", link_str);
                    proto_item_append_text(ti, " : %s", link_str);
                /* if the opt len is 16 and the 6 last bytes is 0n the Link Addr is EUI64 Address */
                }else if(opt_len == 16 && tvb_get_ntohl(tvb, opt_offset + 8) == 0 && tvb_get_ntohs(tvb, opt_offset + 12) == 0){
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_linkaddr_eui64, tvb, opt_offset, 8, ENC_BIG_ENDIAN);
                    ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_src_linkaddr_eui64, tvb, opt_offset, 8, ENC_BIG_ENDIAN);
                    proto_item_set_hidden(ti_opt);
                    ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_linkaddr, tvb, opt_offset, 8, ENC_NA);
                    proto_item_set_hidden(ti_opt);
                    ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_src_linkaddr, tvb, opt_offset, 8, ENC_NA);
                    proto_item_set_hidden(ti_opt);

                    /* Padding: 6 bytes */
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_padding, tvb, opt_offset + 8, 6, ENC_NA);

                    link_str = tvb_address_to_str(pinfo->pool, tvb, AT_EUI64, opt_offset);
                    col_append_fstr(pinfo->cinfo, COL_INFO, " from %s", link_str);
                    proto_item_append_text(ti, " : %s", link_str);
                }else{
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_linkaddr, tvb, opt_offset, opt_len-2, ENC_NA);
                    ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_src_linkaddr, tvb, opt_offset, opt_len-2, ENC_NA);
                    proto_item_set_hidden(ti_opt);
                }
                opt_offset += opt_len;

                break;
            }
            case ND_OPT_TARGET_LINKADDR: /* Target Link-layer Address (2) */
            {
                const char *link_str;
                /* if the opt len is 8, the Link Addr is MAC Address */
                if(opt_len == 8){
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_linkaddr_mac, tvb, opt_offset, 6, ENC_NA);
                    ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_target_linkaddr_mac, tvb, opt_offset, 6, ENC_NA);
                    proto_item_set_hidden(ti_opt);

                    link_str = tvb_ether_to_str(pinfo->pool, tvb, opt_offset);
                    col_append_fstr(pinfo->cinfo, COL_INFO, " is at %s", link_str);
                    proto_item_append_text(ti, " : %s", link_str);

                /* if the opt len is 16 and the 6 last bytes is 0n the Link Addr is EUI64 Address */
                }else if(opt_len == 16 && tvb_get_ntohl(tvb, opt_offset + 8) == 0 && tvb_get_ntohs(tvb, opt_offset + 12) == 0){
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_linkaddr_eui64, tvb, opt_offset, 8, ENC_BIG_ENDIAN);
                    ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_target_linkaddr_eui64, tvb, opt_offset, 8, ENC_BIG_ENDIAN);
                    proto_item_set_hidden(ti_opt);

                    /* Padding: 6 bytes */
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_padding, tvb, opt_offset + 8, 6, ENC_NA);

                    link_str = tvb_address_to_str(pinfo->pool, tvb, AT_EUI64, opt_offset);
                    col_append_fstr(pinfo->cinfo, COL_INFO, " from %s", link_str);
                    proto_item_append_text(ti, " : %s", link_str);
                }else{
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_linkaddr, tvb, opt_offset, opt_len-2, ENC_NA);
                    ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_target_linkaddr, tvb, opt_offset, opt_len-2, ENC_NA);
                    proto_item_set_hidden(ti_opt);
                }
                opt_offset += opt_len;
                break;
            }
            case ND_OPT_PREFIX_INFORMATION: /* Prefix Information (3) */
            {
                static int * const prefix_flag[] = {
                    &hf_icmpv6_opt_prefix_flag_l,
                    &hf_icmpv6_opt_prefix_flag_a,
                    &hf_icmpv6_opt_prefix_flag_r,
                    &hf_icmpv6_opt_prefix_flag_p,
                    &hf_icmpv6_opt_prefix_flag_reserved,
                    NULL
                };

                uint32_t lifetime;
                uint8_t prefix_len;
                /* RFC 4861 */

                /* Prefix Length */
                proto_tree_add_item_ret_uint8(icmp6opt_tree, hf_icmpv6_opt_prefix_len, tvb, opt_offset, 1, ENC_BIG_ENDIAN, &prefix_len);
                opt_offset += 1;

                /* Flags */
                proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_opt_prefix_flag, ett_icmpv6_flag_prefix, prefix_flag, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Prefix Valid Lifetime */
                ti_opt = proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_prefix_valid_lifetime, tvb, opt_offset, 4, ENC_BIG_ENDIAN, &lifetime);
                if (lifetime != LIFETIME_INFINITY) {
                  proto_item_append_text(ti_opt, " (%s)", unsigned_time_secs_to_str(pinfo->pool, lifetime));
                }
                opt_offset += 4;

                /* Prefix Preferred Lifetime */
                ti_opt = proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_prefix_preferred_lifetime, tvb, opt_offset, 4, ENC_BIG_ENDIAN, &lifetime);
                if (lifetime != LIFETIME_INFINITY) {
                  proto_item_append_text(ti_opt, " (%s)", unsigned_time_secs_to_str(pinfo->pool, lifetime));
                }
                opt_offset += 4;

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 4, ENC_NA);
                opt_offset += 4;

                /* Prefix */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_prefix, tvb, opt_offset, 16, ENC_NA);
                proto_item_append_text(ti, " : %s/%d", tvb_ip6_to_str(pinfo->pool, tvb, opt_offset), prefix_len);
                opt_offset += 16;

                break;
            }
            case ND_OPT_REDIRECTED_HEADER: /* Redirected Header (4) */

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 6, ENC_NA);
                opt_offset += 6;

                if (opt_len > 8) {
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_redirected_packet, tvb, opt_offset, opt_len - 8, ENC_NA);
                    opt_tvb = tvb_new_subset_length(tvb, opt_offset, opt_len - 8);
                    opt_offset += dissect_contained_icmpv6(opt_tvb, pinfo, icmp6opt_tree);
                }
                break;
            case ND_OPT_MTU: /* MTU (5) */

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 2, ENC_NA);
                opt_offset += 2;

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_mtu, tvb, opt_offset, 4, ENC_BIG_ENDIAN);
                proto_item_append_text(ti, " : %d", tvb_get_ntohl(tvb, opt_offset));
                opt_offset += 4;
                break;
            case ND_OPT_NBMA: /* NBMA Shortcut Limit Option (6) */

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_nbma_shortcut_limit, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                proto_item_append_text(ti, " : %d", tvb_get_uint8(tvb, opt_offset));

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 1, ENC_NA);
                opt_offset += 1;

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 4, ENC_NA);
                opt_offset += 4;

                break;
            case ND_OPT_ADVINTERVAL: /* Advertisement Interval Option (7) */

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 2, ENC_NA);
                opt_offset += 2;

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_advertisement_interval, tvb, opt_offset, 4, ENC_BIG_ENDIAN);
                proto_item_append_text(ti, " : %d", tvb_get_ntohl(tvb, opt_offset));
                opt_offset += 4;

                break;
            case ND_OPT_HOMEAGENT_INFO: /* Home Agent Information Option (8) */
            {

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 2, ENC_NA);
                opt_offset += 2;

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_home_agent_preference, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                opt_offset += 2;

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_home_agent_lifetime, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                opt_offset += 2;
                break;
            }
            case  ND_OPT_SOURCE_ADDRLIST: /* Source Address List (9) */
            case  ND_OPT_TARGET_ADDRLIST: /* Target Address List (10)*/
            {
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 6, ENC_NA);
                opt_offset += 6;

                while(opt_offset < (offset + opt_len) ) {
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_ipv6_address, tvb, opt_offset, 16, ENC_NA);
                    proto_item_append_text(ti, " %s", tvb_ip6_to_str(pinfo->pool, tvb, opt_offset));
                    opt_offset += 16;
                }
                break;
            }
            case ND_OPT_CGA: /* CGA Option (11) */
            {
                proto_tree *cga_tree;
                proto_item *cga_item;
                uint16_t ext_data_len;
                uint8_t padd_length;
                unsigned par_len;
                asn1_ctx_t asn1_ctx;

                /* Pad Length */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_cga_pad_len, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                padd_length = tvb_get_uint8(tvb, opt_offset);
                opt_offset += 1;

                /* Reserved 8 bits */

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 1, ENC_NA);
                opt_offset += 1;

                /* CGA Parameters A variable-length field containing the CGA Parameters data
                 * structure described in Section 4 of
                 * "Cryptographically Generated Addresses (CGA)", RFC3972.
                 */
                par_len = opt_len -4 -padd_length;
                cga_item = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_cga, tvb, opt_offset, par_len, ENC_NA);
                par_len += opt_offset;

                cga_tree = proto_item_add_subtree(cga_item, ett_icmpv6_cga_param_name);
                proto_tree_add_item(cga_tree, hf_icmpv6_opt_cga_modifier, tvb, opt_offset, 16, ENC_NA);
                opt_offset += 16;

                proto_tree_add_item(cga_tree, hf_icmpv6_opt_cga_subnet_prefix, tvb, opt_offset, 8, ENC_NA);
                opt_offset += 8;

                proto_tree_add_item(cga_tree, hf_icmpv6_opt_cga_count, tvb, opt_offset, 1, ENC_NA);
                opt_offset += 1;

                asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, true, pinfo);
                opt_offset = dissect_x509af_SubjectPublicKeyInfo(false, tvb, opt_offset, &asn1_ctx, cga_tree, hf_icmpv6_opt_cga_subject_public_key_info);

                /* Process RFC 4581*/
                while (opt_offset < par_len) {
                    proto_tree_add_item(cga_tree, hf_icmpv6_opt_cga_ext_type, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                    opt_offset += 2;

                    ext_data_len = tvb_get_ntohs(tvb, opt_offset);
                    proto_tree_add_item(cga_tree, hf_icmpv6_opt_cga_ext_length, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                    opt_offset += 2;

                    proto_tree_add_item(cga_tree, hf_icmpv6_opt_cga_ext_data, tvb, opt_offset, ext_data_len, ENC_NA);
                    opt_offset += ext_data_len;
                }

                /* Padding */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_padding, tvb, opt_offset, padd_length, ENC_NA);
                opt_offset += padd_length;
                break;
            }
            case ND_OPT_RSA: /* RSA Signature Option (12) */
            {
                int par_len;
                /*5.2.  RSA Signature Option */
                /* Reserved, A 16-bit field reserved for future use. */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 2, ENC_NA);
                opt_offset = opt_offset + 2;

                /* Key Hash
                 * A 128-bit field containing the most significant (leftmost) 128
                 * bits of a SHA-1 [14] hash of the public key used for constructing
                 * the signature.
                 */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_rsa_key_hash, tvb, opt_offset, 16, ENC_NA);
                opt_offset = opt_offset + 16;

                /* Digital Signature */
                par_len = opt_len - 20;
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_digital_signature_padding , tvb, opt_offset, par_len, ENC_NA);
                opt_offset += par_len;

                /* Padding */
                /* TODO: Calculate padding length and exclude from the signature */
                break;
            }
            case ND_OPT_TIMESTAMP: /* Timestamp Option (13) */
                /* Reserved A 48-bit field reserved for future use. */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 6, ENC_NA);
                opt_offset += 6;

                /* Timestamp
                 * A 64-bit unsigned integer field containing a timestamp.  The value
                 * indicates the number of seconds since January 1, 1970, 00:00 UTC,
                 * by using a fixed point format.  In this format, the integer number
                 * of seconds is contained in the first 48 bits of the field, and the
                 * remaining 16 bits indicate the number of 1/64K fractions of a
                 * second.
                 */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_timestamp, tvb, opt_offset, 8, ENC_TIME_RFC_3971|ENC_BIG_ENDIAN);
                opt_offset += 8;
                break;
            case ND_OPT_NONCE: /* Nonce option (14) */

                /* 5.3.2.  Nonce Option */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_nonce, tvb, opt_offset, opt_len - 2, ENC_NA);
                opt_offset += opt_len -2;
                break;
            case ND_OPT_TRUST_ANCHOR: /* Trust Anchor Option (15) */
            {
                proto_tree *name_tree;
                proto_item *name_item;
                uint8_t name_type;
                uint8_t padd_length;
                int par_len;
                asn1_ctx_t asn1_ctx;

                /* Name Type */
                proto_tree_add_item_ret_uint8(icmp6opt_tree, hf_icmpv6_opt_name_type, tvb, opt_offset, 1, ENC_BIG_ENDIAN, &name_type);
                opt_offset += 1;

                /* Pad Length */
                proto_tree_add_item_ret_uint8(icmp6opt_tree, hf_icmpv6_opt_cga_pad_len, tvb, opt_offset, 1, ENC_BIG_ENDIAN, &padd_length);
                opt_offset += 1;

                par_len = opt_len - 4 - padd_length;

                switch (name_type){
                    case 1:
                        /* DER Encoded X.501 Name */
                        name_item = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_name_x501, tvb, opt_offset, par_len, ENC_NA);
                        name_tree = proto_item_add_subtree(name_item, ett_icmpv6_opt_name);
                        asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, true, pinfo);
                        dissect_x509if_Name(false, tvb, opt_offset, &asn1_ctx, name_tree, hf_icmpv6_x509if_Name);
                        break;
                    case 2:
                        /* FQDN */
                        proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_name_fqdn, tvb, opt_offset, par_len, ENC_ASCII);
                        break;
                    default:
                        break;
                }
                opt_offset += par_len;

                /* Padding */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_padding, tvb, opt_offset, padd_length, ENC_NA);
                opt_offset += padd_length;

                break;
            }
            case ND_OPT_CERTIFICATE: /* Certificate Option (16) */
            {
                uint8_t cert_type;
                uint8_t padd_length;
                asn1_ctx_t asn1_ctx;

                /* Cert Type */
                proto_tree_add_item_ret_uint8(icmp6opt_tree, hf_icmpv6_opt_cert_type, tvb, opt_offset, 1, ENC_BIG_ENDIAN, &cert_type);
                opt_offset += 1;

                /* Reserved */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 1, ENC_NA);
                opt_offset += 1;

                /* Certificate */

                if(cert_type == 1){
                    asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, true, pinfo);
                    opt_offset = dissect_x509af_Certificate(false, tvb, opt_offset, &asn1_ctx, icmp6opt_tree, hf_icmpv6_x509af_Certificate);
                    padd_length = opt_len - (opt_offset - offset);
                    /* Padding */
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_padding, tvb, opt_offset, padd_length, ENC_NA);
                    opt_offset += padd_length;
                }else{
                    padd_length = opt_len - 4;
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_certificate_padding, tvb, opt_offset, padd_length, ENC_NA);
                    opt_offset += padd_length;
                }
                break;

            }
            case ND_OPT_IP_ADDRESS_PREFIX: /* IP Address/Prefix Option (17) */
            {
                uint8_t prefix_len;

                /* Option-code */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_ipa_option_code, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Prefix Len */
                proto_tree_add_item_ret_uint8(icmp6opt_tree, hf_icmpv6_opt_ipa_prefix_len, tvb, opt_offset, 1, ENC_BIG_ENDIAN, &prefix_len);
                opt_offset += 1;

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 4, ENC_NA);
                opt_offset += 4;

                /* IPv6 Address */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_ipa_ipv6_address, tvb, opt_offset, 16, ENC_NA);
                proto_item_append_text(ti, " %s/%d", tvb_ip6_to_str(pinfo->pool, tvb, opt_offset), prefix_len);
                opt_offset += 16;

                break;
            }
            case ND_OPT_NEW_ROUTER_PREFIX_INFO: /* New Router Prefix Information Option (18) OBSO... */
            {

                uint8_t prefix_len;

                /* Option-code */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_nrpi_option_code, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Prefix Len */
                proto_tree_add_item_ret_uint8(icmp6opt_tree, hf_icmpv6_opt_nrpi_prefix_len, tvb, opt_offset, 1, ENC_BIG_ENDIAN, &prefix_len);
                opt_offset += 1;

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 4, ENC_NA);
                opt_offset += 4;

                /* Prefix */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_nrpi_prefix, tvb, opt_offset, 16, ENC_NA);
                proto_item_append_text(ti, " %s/%u", tvb_ip6_to_str(pinfo->pool, tvb, opt_offset), prefix_len);
                opt_offset += 16;

                break;
            }
            case ND_OPT_LINK_LAYER_ADDRESS: /* Link-layer Address Option (19) */
            {
                /* Option-Code */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_lla_option_code, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Link Layer Address */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_lla_bytes, tvb, opt_offset, opt_len-3, ENC_NA);
                opt_offset += opt_len - 3;
                break;
            }

            case ND_OPT_NEIGHBOR_ADV_ACK: /* Neighbor Advertisement Acknowledgment Option (20) */
            {
                uint8_t status;

                /* Option-Code */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_naack_option_code, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Status */
                proto_tree_add_item_ret_uint8(icmp6opt_tree, hf_icmpv6_opt_naack_status, tvb, opt_offset, 1, ENC_BIG_ENDIAN, &status);
                opt_offset += 1;

                if(status == 2){
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_naack_supplied_ncoa, tvb, opt_offset, 16, ENC_NA);
                    opt_offset += 16;
                }else{
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, opt_len - 4, ENC_NA);
                    opt_offset += opt_len - 4;
                }
                break;
            }
            case ND_OPT_PVD_ID: /* PvD ID (21) */
            {
                int dns_len;
                const char *dns_name, *name_out;
                uint64_t flags;

                static int * const pvd_id_flags[] = {
                    &hf_icmpv6_opt_pvd_id_flags_h,
                    &hf_icmpv6_opt_pvd_id_flags_l,
                    &hf_icmpv6_opt_pvd_id_flags_r,
                    &hf_icmpv6_opt_pvd_id_flags_reserved,
                    NULL
                };

                /* Flags */
                proto_tree_add_bitmask_with_flags_ret_uint64(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_opt_pvd_id_flags,
                  ett_icmpv6_flag_pvd_id, pvd_id_flags, ENC_BIG_ENDIAN, BMT_NO_FALSE | BMT_NO_INT, &flags);

                /* Delay */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_pvd_id_delay, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                opt_offset += 2;

                /* Sequence Number */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_pvd_id_sequence_number, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                opt_offset += 2;

                /* PvD ID FQDN */
                used_bytes = get_dns_name(pinfo->pool, tvb, opt_offset, 0, opt_offset, &dns_name, &dns_len);
                name_out = format_text(pinfo->pool, dns_name, dns_len);
                proto_tree_add_string(icmp6opt_tree, hf_icmpv6_opt_pvd_id_fqdn, tvb, opt_offset, used_bytes, name_out);
                proto_item_append_text(ti, " : %s", name_out);
                opt_offset += used_bytes;

                /* Padding */
                if (opt_offset & 0x07) {
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_padding, tvb, opt_offset, 8 - (opt_offset & 0x07), ENC_NA);
                    opt_offset += 8 - (opt_offset & 0x07);
                }

                /*
                 * When the R-flag is set, a full Router Advertisement message header as specified in [RFC4861].
                 * The sender MUST set the Type field to 134 (the value for "Router Advertisement") and set the Code field to 0.
                 * Receivers MUST ignore both of these fields. The Checksum field MUST be set to 0 by the sender;
                 * non-zero checksums MUST be ignored by the receiver without causing the processing of the message to fail.
                 * All other fields are to be set and parsed as specified in [RFC4861] or any updating documents.
                 */
                if(flags & 0x200) {
                    tvbuff_t *ra_tvb;
                    ra_tvb = tvb_new_subset_length(tvb, opt_offset, 16);
                    call_dissector(icmpv6_handle, ra_tvb, pinfo, icmp6opt_tree);
                    opt_offset += 16;
                }

                /* https://datatracker.ietf.org/doc/html/rfc8801#section-3.1-3.24
                 * Zero or more RA options to be ignored by hosts that are not
                 * PvD aware. */
                if (opt_offset < offset + opt_len) {
                    // Don't dissect options in the main body.
                    opt_tvb = tvb_new_subset_length(tvb, opt_offset, offset + opt_len - opt_offset);
                    opt_offset += dissect_icmpv6_nd_opt(opt_tvb, 0, pinfo, icmp6opt_tree, icmpv6_type);
                }

                break;
            }
            case ND_OPT_MAP: /* MAP Option (23) */
            {
                static int * const map_flags[] = {
                    &hf_icmpv6_opt_map_flag_r,
                    &hf_icmpv6_opt_map_flag_reserved,
                    NULL
                };

                uint32_t lifetime;

                /* Dist */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_map_dist, tvb, opt_offset, 1, ENC_BIG_ENDIAN);

                /* Pref */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_map_pref, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Flags */
                proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_opt_map_flag, ett_icmpv6_flag_map, map_flags, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Valid Lifetime */
                ti_opt = proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_map_valid_lifetime, tvb, opt_offset, 4, ENC_BIG_ENDIAN, &lifetime);
                proto_item_append_text(ti_opt, " (%s)", unsigned_time_secs_to_str(pinfo->pool, lifetime));
                opt_offset += 4;

                /* Global Address */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_map_global_address, tvb, opt_offset, 16, ENC_NA);
                opt_offset += 16;
                break;
            }
            case ND_OPT_ROUTE_INFO: /* Route Information Option (24) */
            {
                /* RFC 4191 */
                uint8_t prefix_len;
                uint8_t route_preference;
                uint32_t lifetime;
                ws_in6_addr prefix;
                address prefix_addr;
                static int * const route_flags[] = {
                    &hf_icmpv6_opt_route_info_flag_route_preference,
                    &hf_icmpv6_opt_route_info_flag_reserved,
                    NULL
                };

                /* Prefix Len */
                proto_tree_add_item_ret_uint8(icmp6opt_tree, hf_icmpv6_opt_prefix_len, tvb, opt_offset, 1, ENC_BIG_ENDIAN, &prefix_len);
                opt_offset += 1;

                /* Flags */
                proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_opt_route_info_flag, ett_icmpv6_flag_route_info, route_flags, ENC_BIG_ENDIAN);

                route_preference = tvb_get_uint8(tvb, opt_offset);
                route_preference = (route_preference & ND_RA_FLAG_RTPREF_MASK) >> 3;
                proto_item_append_text(ti, " : %s", val_to_str(pinfo->pool, route_preference, nd_flag_router_pref, "Unknown %d") );
                opt_offset += 1;

                /* Route Lifetime */
                ti_opt = proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_route_lifetime, tvb, opt_offset, 4, ENC_BIG_ENDIAN, &lifetime);
                if (lifetime != LIFETIME_INFINITY) {
                  proto_item_append_text(ti_opt, " (%s)", unsigned_time_secs_to_str(pinfo->pool, lifetime));
                }
                opt_offset += 4;

                /* Prefix */
                switch(opt_len){
                    case 8: /* Default Option Length without prefix */
                        proto_item_append_text(ti, " ::/%d", prefix_len);
                        break;
                    case 16:
                        memset(&prefix, 0, sizeof(prefix));
                        tvb_memcpy(tvb, (uint8_t *)&prefix.bytes, opt_offset, 8);
                        proto_tree_add_ipv6(icmp6opt_tree, hf_icmpv6_opt_prefix, tvb, opt_offset, 8, &prefix);
                        set_address(&prefix_addr, AT_IPv6, 16, prefix.bytes);
                        proto_item_append_text(ti, " %s/%d", address_to_str(pinfo->pool, &prefix_addr), prefix_len);
                        opt_offset += 8;
                        break;
                    case 24:
                        proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_prefix, tvb, opt_offset, 16, ENC_NA);
                        proto_item_append_text(ti, " %s/%d", tvb_ip6_to_str(pinfo->pool, tvb, opt_offset), prefix_len);
                        opt_offset += 16;
                        break;
                    default:
                        expert_add_info(pinfo, ti_opt_len, &ei_icmpv6_invalid_option_length);
                        break;
                }
                break;

            }

            case ND_OPT_RECURSIVE_DNS_SERVER: /* Recursive DNS Server Option (25) */
            {
                uint32_t lifetime;

                /* Reserved */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 2, ENC_NA);
                opt_offset += 2;

                /* RDNSS Lifetime */
                ti_opt = proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_rdnss_lifetime, tvb, opt_offset, 4, ENC_BIG_ENDIAN, &lifetime);
                if (lifetime != LIFETIME_INFINITY) {
                  proto_item_append_text(ti_opt, " (%s)", unsigned_time_secs_to_str(pinfo->pool, lifetime));
                }
                opt_offset += 4;

                while(opt_offset < (offset + opt_len) ) {
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_rdnss, tvb, opt_offset, 16, ENC_NA);
                    proto_item_append_text(ti, " %s", tvb_ip6_to_str(pinfo->pool, tvb, opt_offset));
                    opt_offset += 16;

                }
                break;
            }
            case ND_OPT_FLAGS_EXTENSION: /* RA Flags Extension Option (26) */
            {
                static int * const extension_flags[] = {
                    &hf_icmpv6_opt_efo_rsv,
                    &hf_icmpv6_opt_efo_pex,
                    NULL
                };

                proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_opt_efo, ett_icmpv6_flag_efo, extension_flags, ENC_BIG_ENDIAN);
                opt_offset += 6;
                break;
            }
            case ND_OPT_HANDOVER_KEY_REQUEST: /* Handover Key Request Option (27) */
            {
                int par_len;
                unsigned padd_length;

                /* Pad Length */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hkr_pad_length, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                padd_length = tvb_get_uint8(tvb, opt_offset);
                opt_offset += 1;

                /* AT */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hkr_at, tvb, opt_offset, 1, ENC_BIG_ENDIAN);

                /* Reserved */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hkr_reserved, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Handover Key Encryption Public Key */
                par_len = opt_len-4-padd_length;
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hkr_encryption_public_key, tvb, opt_offset, par_len, ENC_NA);
                opt_offset += par_len;

                /* Padding */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hkr_padding, tvb, opt_offset, padd_length, ENC_NA);
                opt_offset += 1;
                break;
            }
            case ND_OPT_HANDOVER_KEY_REPLY: /* Handover Key Reply Option (28) */
            {
                int par_len;
                unsigned padd_length;

                /* Pad Length */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hkr_pad_length, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                padd_length = tvb_get_uint8(tvb, opt_offset);
                opt_offset += 1;

                /* AT */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hkr_at, tvb, opt_offset, 1, ENC_BIG_ENDIAN);

                /* Reserved */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hkr_reserved, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Lifetime */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hkr_lifetime, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                opt_offset += 2;

                /* Encrypted Handover Key */
                par_len = opt_len-6-padd_length;
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hkr_encrypted_handover_key, tvb, opt_offset, par_len, ENC_NA);
                opt_offset += par_len;

                /* Padding */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hkr_padding, tvb, opt_offset, padd_length, ENC_NA);
                opt_offset += 1;
                break;
            }
            case ND_OPT_HANDOVER_ASSIST_INFO: /* Handover Assist Information Option (29) */
            {
                uint8_t hai_len;
                int padd_length;
                /* Option-Code */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hai_option_code, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* HAI Length */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hai_length, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                hai_len = tvb_get_uint8(tvb, opt_offset);
                opt_offset += 1;

                /* HAI Value */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_hai_value, tvb, opt_offset, hai_len, ENC_NA);
                opt_offset += hai_len;

                /* Padding... */
                padd_length = opt_len - (opt_offset - offset);
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_padding, tvb, opt_offset, padd_length, ENC_NA);
                opt_offset += padd_length;

                break;
            }
            case ND_OPT_MOBILE_NODE_ID: /* Mobile Node Identifier Option (30) */
            {
                uint8_t mn_len;
                int padd_length;
                /* Option-Code */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_mn_option_code, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* MN Length */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_mn_length, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                mn_len = tvb_get_uint8(tvb, opt_offset);
                opt_offset += 1;

                /* MN Value */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_mn_value, tvb, opt_offset, mn_len, ENC_NA);
                opt_offset += mn_len;

                /* Padding... */
                padd_length = opt_len - (opt_offset - offset);
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_padding, tvb, opt_offset, padd_length, ENC_NA);
                opt_offset += padd_length;

                break;
            }
            case ND_OPT_DNS_SEARCH_LIST: /* DNS Search List Option (31) */
            {
                uint32_t lifetime;
                int dnssl_len;
                const char *dnssl_name, *name_out;

                /* Reserved */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 2, ENC_NA);
                opt_offset += 2;

                /* DNSSL Lifetime */
                ti_opt = proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_dnssl_lifetime, tvb, opt_offset, 4, ENC_BIG_ENDIAN, &lifetime);
                if (lifetime != LIFETIME_INFINITY) {
                  proto_item_append_text(ti_opt, " (%s)", unsigned_time_secs_to_str(pinfo->pool, lifetime));
                }
                opt_offset += 4;
                while(opt_offset < (offset + opt_len) ) {

                    if(tvb_get_uint8(tvb, opt_offset) == 0){
                        /* Padding... */
                        int padd_length = (offset + opt_len) - opt_offset;
                        proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_padding, tvb, opt_offset, padd_length, ENC_NA);
                        opt_offset += padd_length;
                        break;
                    }
                    used_bytes = get_dns_name(pinfo->pool, tvb, opt_offset, 0, opt_offset, &dnssl_name, &dnssl_len);
                    name_out = format_text(pinfo->pool, dnssl_name, dnssl_len);
                    proto_tree_add_string(icmp6opt_tree, hf_icmpv6_opt_dnssl, tvb, opt_offset, used_bytes, name_out);
                    proto_item_append_text(ti, " %s", name_out);
                    opt_offset += used_bytes;

                }
                break;
            }
            case ND_OPT_PROXY_SIGNATURE: /* Proxy Signature Option (32) */
            {
                int par_len;

                /* Reserved */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 2, ENC_NA);
                opt_offset +=  2;

                /* Key Hash
                 * A 128-bit field containing the most significant (leftmost) 128
                 * bits of a SHA-1 [14] hash of the public key used for constructing
                 * the signature.
                 */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_ps_key_hash, tvb, opt_offset, 16, ENC_NA);
                opt_offset += 16;

                /* Digital Signature */
                par_len = opt_len - 20;
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_digital_signature_padding , tvb, opt_offset, par_len, ENC_NA);
                opt_offset += par_len;
                /* Padding */
                /* TODO: Calculate padding length and exclude from the signature */
                break;
            }
            case ND_OPT_ADDR_REGISTRATION:
            {
                /* 6lowpan-ND */
                uint8_t status_field;

                static int * const earo_prefix_flags[] = {
                    &hf_icmpv6_opt_earo_flag_f,
                    NULL
                };

                static int * const earo_flags[] = {
                    &hf_icmpv6_opt_earo_flag_reserved,
                    &hf_icmpv6_opt_earo_flag_c,
                    &hf_icmpv6_opt_earo_flag_p,
                    &hf_icmpv6_opt_earo_flag_i,
                    &hf_icmpv6_opt_earo_flag_r,
                    &hf_icmpv6_opt_earo_flag_t,
                    NULL
                };

                /* T-Flag determines EARO instead of ARO */
                bool is_earo = tvb_get_uint8(tvb, opt_offset + 2) & ND_OPT_EARO_FLAG_T;

                /* Status/Prefix length
                 * Re-use of field (RFC 9926/9927)
                 *
                 * With EARO messages, the 8-bit status field is re-used for
                 *
                 * NS: 1 bit F-Flag; 7 bits Prefix length
                 * NA: 2 bits reserved, 6 bits Status
                 */
                status_field = tvb_get_uint8(tvb, opt_offset);

                if(is_earo && icmpv6_type == ICMP6_ND_NEIGHBOR_SOLICIT) {

                    proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_opt_earo_flag, ett_icmpv6_flag_earo, earo_prefix_flags, ENC_BIG_ENDIAN);

                    /* No status_field, we don't need to store or correct its value */
                    proto_tree_add_uint(icmp6opt_tree, hf_icmpv6_opt_earo_prefix_len, tvb, opt_offset, 1, (uint32_t)(status_field & 0x7F));

                } else if(is_earo && icmpv6_type == ICMP6_ND_NEIGHBOR_ADVERT) {

                    /* Reserved: 2 MSB of status_field */
                    proto_tree_add_uint(icmp6opt_tree, hf_icmpv6_opt_earo_reserved, tvb, opt_offset, 1, (uint32_t)((status_field & 0xC0) >> 6));

                    /* Set status_field to the actual status (6 LSB) */
                    status_field &= 0x3F;
                    proto_tree_add_uint(icmp6opt_tree, hf_icmpv6_opt_aro_status, tvb, opt_offset, 1, (uint32_t)status_field);

                } else {

                    /* "Regular" ARO status */
                    proto_tree_add_uint(icmp6opt_tree, hf_icmpv6_opt_aro_status, tvb, opt_offset, 1, (uint32_t)status_field);

                }
                opt_offset += 1;

                /* EARO Opaque */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_earo_opaque, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* EARO Flags */
                proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_opt_earo_flag, ett_icmpv6_flag_earo, earo_flags, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* EARO Transaction ID */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_earo_tid, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Lifetime */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_aro_registration_lifetime, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                opt_offset += 2;

                /* RFC 6775 defines the field for the EUI-64 interface ID.
                 * With RFC 8505 which introduced 'Extended Address Registration Option' (EARO),
                 * the field is used for 'Registration Ownership Verifier' (ROVR).
                 *
                 * RFC 8505 Sect. 4.1:
                 * The ROVR size MUST be 64 bits when backward compatibility is needed;
                 * otherwise, the size MAY be 128, 192, or 256 bits
                 *
                 * In genaral, the T-flag indicates the presence of the TID and therefore
                 * distinguishes between ARO (T=0) and EARO (T=1).
                 */
                if(is_earo) {

                    /* Check length, dissect arbitrary data and add expert item if length violates rules above.
                     *
                     * We already dissected 8 octets in the option.
                     * opt_len-8 is the remaining data in this option.
                     *
                     * ToDo: Add proper dissection of ROVR data (RFC 8505) or Crypto-ID (RFC 8928).
                     */
                    unsigned int opt_remaining = opt_len-8;

                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_earo_rovr, tvb, opt_offset, opt_remaining, ENC_NA);
                    if(opt_remaining != 8 && opt_remaining != 16 && opt_remaining != 24 && opt_remaining != 32)
                        expert_add_info_format(pinfo, ti, &ei_icmpv6_invalid_option_length, "Invalid ROVR length (%i)", opt_remaining);

                    opt_offset += opt_remaining;
                } else {
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_aro_eui64, tvb, opt_offset, 8, ENC_BIG_ENDIAN);
                    proto_item_append_text(ti, " : Register %s %s", tvb_address_to_str(pinfo->pool, tvb, AT_EUI64, opt_offset), val_to_str(pinfo->pool, status_field, nd_opt_earo_status_val, "Unknown %d"));
                    opt_offset += 8;
                }

            }
            break;
            case ND_OPT_6LOWPAN_CONTEXT: /* 6LoWPAN Context (TBD2 Pending IANA...) */
            {
                ieee802154_hints_t *hints;
                /* 6lowpan-ND */
                uint8_t context_id;
                uint8_t context_len;
                ws_in6_addr context_prefix;
                address context_prefix_addr;
                static int * const _6lowpan_context_flags[] = {
                    &hf_icmpv6_opt_6co_flag_c,
                    &hf_icmpv6_opt_6co_flag_cid,
                    &hf_icmpv6_opt_6co_flag_reserved,
                    NULL
                };

                /* Context Length */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_6co_context_length, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                context_len = tvb_get_uint8(tvb, opt_offset);
                opt_offset += 1;

                /*  Flags & CID */
                context_id = tvb_get_uint8(tvb, opt_offset) & ND_OPT_6CO_FLAG_CID;
                proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_opt_6co_flag, ett_icmpv6_flag_6lowpan, _6lowpan_context_flags, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Reserved */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_reserved, tvb, opt_offset, 2, ENC_NA);
                opt_offset += 2;

                /* Lifetime */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_6co_valid_lifetime, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                opt_offset += 2;

                /* Context */
                memset(&context_prefix.bytes, 0, sizeof(context_prefix));
                switch(opt_len){
                    case 8: /* Default Option Length without context prefix */
                        proto_item_append_text(ti, " ::/%d", context_len);
                        break;
                    case 16:
                        tvb_memcpy(tvb, (uint8_t *)&context_prefix.bytes, opt_offset, 8);
                        proto_tree_add_ipv6(icmp6opt_tree, hf_icmpv6_opt_6co_context_prefix, tvb, opt_offset, 8, &context_prefix);
                        set_address(&context_prefix_addr, AT_IPv6, 16, context_prefix.bytes);
                        proto_item_append_text(ti, " %s/%d", address_to_str(pinfo->pool, &context_prefix_addr), context_len);
                        opt_offset += 8;
                        break;
                    case 24:
                        tvb_memcpy(tvb, (uint8_t *)&context_prefix.bytes, opt_offset, 16);
                        proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_6co_context_prefix, tvb, opt_offset, 16, ENC_NA);
                        proto_item_append_text(ti, " %s/%d", tvb_ip6_to_str(pinfo->pool, tvb, opt_offset), context_len);
                        opt_offset += 16;
                        break;
                    default:
                        expert_add_info(pinfo, ti_opt_len, &ei_icmpv6_invalid_option_length);
                        break;
                }
                /* Update the 6LoWPAN dissectors with new context information. */
                hints = (ieee802154_hints_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_ieee802154, 0);
                if ((opt_len <= 24) && hints) {
                    lowpan_context_insert(context_id, hints->src_pan, context_len, &context_prefix, pinfo->num);
                }
            }
            break;
            case ND_OPT_AUTH_BORDER_ROUTER: /* Authoritative Border Router (33) */
            {
                uint32_t version_low, version_high, valid_lifetime;

                /* Version low*/
                proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_abro_version_low, tvb, opt_offset, 2, ENC_BIG_ENDIAN, &version_low);
                opt_offset += 2;

                /* Version high */
                proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_abro_version_high, tvb, opt_offset, 2, ENC_BIG_ENDIAN, &version_high);
                opt_offset += 2;

                /* Valid lifetime */
                proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_abro_valid_lifetime, tvb, opt_offset, 2, ENC_BIG_ENDIAN, &valid_lifetime);
                opt_offset += 2;

                /* 6LBR Address */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_abro_6lbr_address, tvb, opt_offset, 16, ENC_NA);
                proto_item_append_text(ti, " : Version %d.%d, Valid Lifetime : %d, 6LBR : %s", version_high, version_low, valid_lifetime, tvb_ip6_to_str(pinfo->pool, tvb, opt_offset));
                opt_offset += 16;

            }
            break;
            case ND_OPT_6CIO: /* 6LoWPAN Capability Indication Option (35) */
            {

                static int * const opt_6cio_flags[] = {
                    &hf_icmpv6_opt_6cio_flag_reserved,
                    &hf_icmpv6_opt_6cio_flag_f,
                    &hf_icmpv6_opt_6cio_flag_g,
                    &hf_icmpv6_opt_6cio_flag_e,
                    &hf_icmpv6_opt_6cio_flag_p,
                    &hf_icmpv6_opt_6cio_flag_b,
                    &hf_icmpv6_opt_6cio_flag_l,
                    &hf_icmpv6_opt_6cio_flag_d,
                    &hf_icmpv6_opt_6cio_flag_a,
                    &hf_icmpv6_opt_6cio_flag_x,
                    &hf_icmpv6_opt_6cio_flag_experimental,
                    NULL
                };

                proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_opt_6cio_flag,
                                ett_icmpv6_flag_6cio, opt_6cio_flags, ENC_BIG_ENDIAN);
                opt_offset += 6;


            }
            break;
            case ND_OPT_CAPPORT: /* DHCP Captive-Portal Option (37) */
            {
                proto_item *ti_cp;

                ti_cp = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_captive_portal, tvb, opt_offset, opt_len-2, ENC_ASCII);
                proto_item_set_url(ti_cp);
                opt_offset += opt_len - 2;

            }
            break;
            case ND_OPT_PREF64: /* PREF64 Option (38) */
            {
                ws_in6_addr prefix;
                uint32_t plc;

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_pref64_scaled_lifetime, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_pref64_plc, tvb, opt_offset, 2, ENC_BIG_ENDIAN, &plc);
                opt_offset += 2;

                /* Prefix */
                memset(&prefix.bytes, 0, sizeof(prefix));
                switch(plc){
                    case 0: /* 96 bits prefix length */
                        tvb_memcpy(tvb, (uint8_t *)&prefix.bytes, opt_offset, 12);
                        proto_tree_add_ipv6(icmp6opt_tree, hf_icmpv6_opt_pref64_prefix, tvb, opt_offset, 12, &prefix);
                        break;
                    case 1: /* 64 bits prefix length */
                        tvb_memcpy(tvb, (uint8_t *)&prefix.bytes, opt_offset, 8);
                        proto_tree_add_ipv6(icmp6opt_tree, hf_icmpv6_opt_pref64_prefix, tvb, opt_offset, 8, &prefix);
                        break;
                    case 2: /* 56 bits prefix length */
                        tvb_memcpy(tvb, (uint8_t *)&prefix.bytes, opt_offset, 7);
                        proto_tree_add_ipv6(icmp6opt_tree, hf_icmpv6_opt_pref64_prefix, tvb, opt_offset, 7, &prefix);
                        break;
                    case 3: /* 48 bits prefix length */
                        tvb_memcpy(tvb, (uint8_t *)&prefix.bytes, opt_offset, 6);
                        proto_tree_add_ipv6(icmp6opt_tree, hf_icmpv6_opt_pref64_prefix, tvb, opt_offset, 6, &prefix);
                        break;
                    case 4: /* 40 bits prefix length */
                        tvb_memcpy(tvb, (uint8_t *)&prefix.bytes, opt_offset, 5);
                        proto_tree_add_ipv6(icmp6opt_tree, hf_icmpv6_opt_pref64_prefix, tvb, opt_offset, 5, &prefix);
                        break;
                    case 5: /* 32 bits prefix length */
                        tvb_memcpy(tvb, (uint8_t *)&prefix.bytes, opt_offset, 4);
                        proto_tree_add_ipv6(icmp6opt_tree, hf_icmpv6_opt_pref64_prefix, tvb, opt_offset, 4, &prefix);
                        break;
                    default:
                        expert_add_info(pinfo, ti_opt_len, &ei_icmpv6_invalid_option_length);
                        break;
                }
                opt_offset += 12;
            }
            break;
            case ND_OPT_ENCRYPTED_DNS: /* Encrypted DNS Option (144) */
            {
                unsigned opt_start = opt_offset;
                unsigned opt_end = opt_offset + opt_len - 2;
                uint32_t lifetime;
                uint32_t adn_len = 0;
                int adn_parsed_len;
                const char *adn;
                uint32_t addrs_len = 0;
                uint32_t svc_params_len = 0;
                uint32_t i;
                tvbuff_t *next_tvb;
                proto_tree *dnr_addrs_tree;
                int padding_len;

                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_dnr_svcpriority, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                opt_offset += 2;

                ti_opt = proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_dnr_lifetime, tvb, opt_offset, 4, ENC_BIG_ENDIAN, &lifetime);
                if (lifetime != LIFETIME_INFINITY) {
                    proto_item_append_text(ti_opt, " (%s)", unsigned_time_secs_to_str(pinfo->pool, lifetime));
                }
                opt_offset += 4;

                if (opt_offset + 2 > opt_end) {
                    expert_add_info_format(pinfo, ti_opt_len, &ei_icmpv6_invalid_option_length, "DNR: truncated option (no ADN length)");
                    break;
                }

                proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_dnr_auth_domain_name_len, tvb, opt_offset, 2, ENC_BIG_ENDIAN, &adn_len);
                opt_offset += 2;

                if (opt_offset + adn_len > opt_end) {
                    expert_add_info_format(pinfo, ti_opt_len, &ei_icmpv6_invalid_option_length, "DNR: truncated option (ADN too long)");
                    break;
                }

                get_dns_name(pinfo->pool, tvb, opt_offset, adn_len, opt_offset, &adn, &adn_parsed_len);
                proto_tree_add_string(icmp6opt_tree, hf_icmpv6_opt_dnr_auth_domain_name, tvb, opt_offset, adn_len, format_text(pinfo->pool, adn, adn_parsed_len));
                opt_offset += adn_len;

                // If a DNR option ends after the authentication-domain-name (ADN), it is in ADN-only mode (see RFC 9463, Section 3.1.6).
                // However, since ND options must be a multiple of 8 bytes, there could be padding. Technically in order for the DNR
                // option to be valid and not in ADN-only mode, there must be at least 20 bytes after the ADN (2 bytes addrs_len + 16
                // bytes IPv6 address + 2 bytes svc_params_len), but just assume here that ADN-only mode will reach to the next 8 byte
                // boundary.
                if ((opt_end - opt_offset) < 8) {
                    proto_tree_add_expert(icmp6opt_tree, pinfo, &ei_icmpv6_opt_dnr_adn_only_mode, tvb, opt_start - 2, opt_len);

                    padding_len = opt_end - opt_offset;
                    if (padding_len > 0) {
                        proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_dnr_padding, tvb, opt_offset, padding_len, ENC_NA);
                    }

                    opt_offset += padding_len;

                    break;
                }

                proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_dnr_addrs_len, tvb, opt_offset, 2, ENC_BIG_ENDIAN, &addrs_len);
                opt_offset += 2;

                if ((unsigned)opt_offset + addrs_len > (unsigned)opt_end) {
                    expert_add_info_format(pinfo, ti_opt_len, &ei_icmpv6_invalid_option_length, "DNR: truncated option (addrs_len too long)");
                    break;
                }

                if (addrs_len == 0 || addrs_len % 16 != 0) {
                    expert_add_info_format(pinfo, ti_opt_len, &ei_icmpv6_invalid_option_length, "DNR: invalid addrs_len %d (not divisible by 16)", addrs_len);
                    break;
                }

                ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_dnr_addrs, tvb, opt_offset, addrs_len, ENC_NA);
                dnr_addrs_tree = proto_item_add_subtree(ti_opt, ett_icmpv6_opt_dnr_addrs);

                proto_item_append_text(ti_opt, ":");

                for (i = 0; i < addrs_len; i += 16) {
                    proto_tree_add_item(dnr_addrs_tree, hf_icmpv6_opt_dnr_addrs_ip, tvb, opt_offset + i, 16, ENC_NA);
                    proto_item_append_text(ti_opt, "%c%s", (i == 0 ? ' ' : ','), tvb_ip6_to_str(pinfo->pool, tvb, opt_offset + i));
                }

                opt_offset += addrs_len;

                // Handle the service parameters.
                proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_opt_dnr_svc_params_len, tvb, opt_offset, 2, ENC_BIG_ENDIAN, &svc_params_len);
                opt_offset += 2;

                if ((unsigned)opt_offset + svc_params_len > (unsigned)opt_end) {
                    expert_add_info_format(pinfo, ti_opt_len, &ei_icmpv6_invalid_option_length, "DNR: truncated option (svc_params_len too long)");
                    break;
                }

                next_tvb = tvb_new_subset_length(tvb, opt_offset, svc_params_len);
                opt_offset += call_dissector(svc_params_handle, next_tvb, pinfo, icmp6opt_tree);

                padding_len = opt_end - opt_offset;
                if (padding_len > 0) {
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_opt_dnr_padding, tvb, opt_offset, padding_len, ENC_NA);

                    opt_offset += padding_len;
                }
            }
            break;
            default :
                expert_add_info_format(pinfo, ti, &ei_icmpv6_undecoded_option,
                                       "Dissector for ICMPv6 Option (%d)"
                                       " code not implemented, Contact Wireshark developers"
                                       " if you want this supported", opt_type);
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_data, tvb, opt_offset, opt_len-2, ENC_NA);
                opt_offset += opt_len - 2;
                break;

        } /* switch (opt_type) */

        offset += opt_len;

        if(offset > opt_offset){
            ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_unknown_data, tvb, opt_offset, offset - opt_offset, ENC_NA);
            expert_add_info(pinfo, ti_opt, &ei_icmpv6_unknown_data);
        }
        /* Close the ) to option root label */
        proto_item_append_text(ti, ")");
    }
    return offset;
}


/* RPL: RFC 6550/6997 : Routing and Discovery of P2P Routes in Low-Power and Lossy Networks. */
static int
dissect_icmpv6_rpl_opt(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, uint8_t icmp6_code)
{
    proto_tree *icmp6opt_tree, *flag_tree;
    proto_item *ti, *ti_opt, *ti_opt_len, *ti_opt_reply, *ti_opt_hop_by_hop, *ti_opt_num_of_routes,
               *ti_opt_lifetime, *ti_opt_mr_nh = NULL;
    uint8_t     opt_type;
    int         opt_len;
    int         opt_offset;

    while ((int)tvb_reported_length(tvb) > offset) {
        /* there are more options */

        /* ICMPv6 RPL Option */
        ti = proto_tree_add_item(tree, hf_icmpv6_rpl_opt, tvb, offset, 1, ENC_NA);
        icmp6opt_tree = proto_item_add_subtree(ti, ett_icmpv6_rpl_opt);
        opt_offset = offset;

        /* Option type */
        proto_tree_add_item_ret_uint8(icmp6opt_tree, hf_icmpv6_rpl_opt_type, tvb, opt_offset, 1, ENC_BIG_ENDIAN, &opt_type);
        opt_offset += 1;

        /* Add option name to option root label */
        proto_item_append_text(ti, " (%s", val_to_str(pinfo->pool, opt_type, rpl_option_vals, "Unknown %d"));

        /* The Pad1 option is a special case, and contains no data. */
        if (opt_type == RPL_OPT_PAD1) {
            offset += 1;
            proto_item_append_text(ti, ")");
            continue;
        }

        /* Option length */
        ti_opt_len = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_length, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
        opt_len = tvb_get_uint8(tvb, opt_offset);
        proto_item_set_len(ti, opt_len + 2);
        opt_offset += 1;

        /* decode... */
        switch (opt_type) {
            case RPL_OPT_PADN:
                /* n-byte padding */
                ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_padn, tvb, opt_offset, opt_len, ENC_NA);
                proto_item_append_text(ti_opt, " (Length : %i bytes)", opt_len);
                opt_offset += opt_len;
                break;
            case RPL_OPT_METRIC: {
                /* DAG metric container */
                /* See RFC 6551 for formatting. */

                proto_tree *metric_constraint_tree;
                proto_item *ti_metric_constraint;
                uint8_t metric_constraint_type;
                /* N.B. keeping this as a signed value to detect potential underflow. */
                int metric_len;

                while (opt_offset < offset + opt_len) {
                    static int * const rpl_metric_flags[] = {
                        &hf_icmpv6_rpl_opt_metric_reserved,
                        &hf_icmpv6_rpl_opt_metric_flag_p,
                        &hf_icmpv6_rpl_opt_metric_flag_c,
                        &hf_icmpv6_rpl_opt_metric_flag_o,
                        &hf_icmpv6_rpl_opt_metric_flag_r,
                        &hf_icmpv6_rpl_opt_metric_a,
                        &hf_icmpv6_rpl_opt_metric_prec,
                        NULL
                    };
                    uint16_t metric_constraint_flags;

                    /* Metric/Constraint type */
                    metric_constraint_type = tvb_get_uint8(tvb, opt_offset);
                    ti_metric_constraint = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_metric_type, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                    metric_constraint_tree = proto_item_add_subtree(ti_metric_constraint, ett_icmpv6_rpl_metric_type);
                    opt_offset += 1;

                    /* Flags */
                    proto_tree_add_bitmask(metric_constraint_tree, tvb, opt_offset, hf_icmpv6_rpl_opt_metric_flags, ett_icmpv6_rpl_metric_flags, rpl_metric_flags, ENC_BIG_ENDIAN);
                    metric_constraint_flags = tvb_get_uint16(tvb, opt_offset, ENC_BIG_ENDIAN);
                    opt_offset += 2;

                    /* Metric length */
                    metric_len = tvb_get_uint8(tvb, opt_offset);
                    proto_tree_add_item(metric_constraint_tree, hf_icmpv6_rpl_opt_metric_len, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                    proto_item_set_len(ti_metric_constraint, metric_len + 4);
                    opt_offset += 1;

                    /* Metric/Constraint Type */
                    switch(metric_constraint_type) {
                        case RPL_METRIC_NSA: /* Node State and Attribute Object */
                            {
                            static int * const metric_nsa_flags[] = {
                                &hf_icmpv6_rpl_opt_metric_nsa_object_reserved,
                                &hf_icmpv6_rpl_opt_metric_nsa_object_flags,
                                &hf_icmpv6_rpl_opt_metric_nsa_object_flag_a,
                                &hf_icmpv6_rpl_opt_metric_nsa_object_flag_o,
                                NULL
                            };

                            proto_item *ti_metric_nsa_object =  proto_tree_add_bitmask(metric_constraint_tree, tvb, opt_offset, hf_icmpv6_rpl_opt_metric_nsa_object,
                                                    ett_icmpv6_rpl_metric_nsa_object, metric_nsa_flags, ENC_BIG_ENDIAN);
                            proto_item_set_len(ti_metric_nsa_object, 2);
                            opt_offset += 2;
                            metric_len -= 2;


                            while(metric_len > 0){
                              /* TLV */
                              tvb_get_uint8(tvb, opt_offset);
                              proto_item *ti_metric_nsa_tlv = proto_tree_add_item(metric_constraint_tree, hf_icmpv6_rpl_opt_metric_nsa_object_opttlv_object, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                              proto_tree * metric_nsa_tlv_tree = proto_item_add_subtree(ti_metric_nsa_tlv, ett_icmpv6_rpl_metric_nsa_object_tlv_type);

                              /* TLV type */
                              proto_tree_add_item(metric_nsa_tlv_tree, hf_icmpv6_rpl_opt_metric_nsa_object_opttlv_object_type, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                              opt_offset += 1;
                              metric_len -= 1;

                              /* TLV length */
                              int nsa_tlv_len = tvb_get_uint8(tvb, opt_offset);
                              proto_tree_add_item(metric_nsa_tlv_tree, hf_icmpv6_rpl_opt_metric_nsa_object_opttlv_object_length, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                              proto_item_set_len(ti_metric_nsa_tlv, nsa_tlv_len + 2);
                              opt_offset += 1;
                              metric_len -= 1;

                              /* TLV data */
                              proto_tree_add_item(metric_nsa_tlv_tree, hf_icmpv6_rpl_opt_metric_nsa_object_opttlv_object_data, tvb, opt_offset, nsa_tlv_len, ENC_NA);
                              opt_offset += nsa_tlv_len;
                              metric_len -= nsa_tlv_len;
                            }
                            break;
                            }
                        case RPL_METRIC_NE: /* Node Energy */
                            {
                            static int * const metric_ne_flags[] = {
                                &hf_icmpv6_rpl_opt_metric_ne_object_flags,
                                &hf_icmpv6_rpl_opt_metric_ne_object_flag_i,
                                &hf_icmpv6_rpl_opt_metric_ne_object_type,
                                &hf_icmpv6_rpl_opt_metric_ne_object_flag_e,
                                &hf_icmpv6_rpl_opt_metric_ne_object_energy,
                                NULL
                            };

                            for (; metric_len > 0; metric_len -= 2) {
                                proto_tree_add_bitmask(metric_constraint_tree, tvb, opt_offset, hf_icmpv6_rpl_opt_metric_ne_object,
                                                    ett_icmpv6_rpl_metric_ne_object, metric_ne_flags, ENC_BIG_ENDIAN);
                                opt_offset += 2;
                            }
                            break;
                            }
                        case RPL_METRIC_HP: /* Hop Count Object */
                            {
                            static int * const metric_hp_flags[] = {
                                &hf_icmpv6_rpl_opt_metric_hp_object_reserved,
                                &hf_icmpv6_rpl_opt_metric_hp_object_flags,
                                &hf_icmpv6_rpl_opt_metric_hp_object_hp,
                                NULL
                            };
                            proto_tree_add_bitmask(metric_constraint_tree, tvb, opt_offset, hf_icmpv6_rpl_opt_metric_hp_object,
                                                    ett_icmpv6_rpl_metric_hp_object, metric_hp_flags, ENC_BIG_ENDIAN);
                            opt_offset += 2;
                            break;
                            }
                        case RPL_METRIC_LT: /* Link Throughput Object */
                            for (; metric_len > 0; metric_len -= 4) {
                                proto_tree_add_item(metric_constraint_tree, hf_icmpv6_rpl_opt_metric_lt_object_lt, tvb, opt_offset, 4, ENC_BIG_ENDIAN);
                                opt_offset += 4;
                            }
                            break;
                        case RPL_METRIC_LL: /* Link Latency Object */
                            for (; metric_len > 0; metric_len -= 4) {
                                proto_tree_add_item(metric_constraint_tree, hf_icmpv6_rpl_opt_metric_ll_object_ll, tvb, opt_offset, 4, ENC_BIG_ENDIAN);
                                opt_offset += 4;
                            }
                            break;
                        case RPL_METRIC_LQL: /* Link Quality Level Object */
                            {
                            static int * const metric_lql_flags[] = {
                                &hf_icmpv6_rpl_opt_metric_lql_object_val,
                                &hf_icmpv6_rpl_opt_metric_lql_object_counter,
                                NULL
                            };

                            proto_tree_add_item(metric_constraint_tree, hf_icmpv6_rpl_opt_metric_lql_object_res, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                            opt_offset += 1;
                            metric_len -= 1;
                            for (; metric_len > 0; metric_len -= 1) {
                                proto_tree_add_bitmask(metric_constraint_tree, tvb, opt_offset, hf_icmpv6_rpl_opt_metric_lql_object,
                                                    ett_icmpv6_rpl_metric_lql_object, metric_lql_flags, ENC_BIG_ENDIAN);
                                opt_offset += 1;
                            }
                            break;
                            }
                        case RPL_METRIC_ETX: /* ETX Object */
                            for (; metric_len > 0; metric_len -= 2) {
                                proto_tree_add_item(metric_constraint_tree, hf_icmpv6_rpl_opt_metric_etx_object_etx, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                                opt_offset += 2;
                            }
                            break;
                        case RPL_METRIC_LC: /* Link Color Object */
                            proto_tree_add_item(metric_constraint_tree, hf_icmpv6_rpl_opt_metric_lc_object_res, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                            opt_offset += 1;
                            metric_len -= 1;
                            for (; metric_len > 0; metric_len -= 2) {
                                ti_opt = proto_tree_add_item(metric_constraint_tree, hf_icmpv6_rpl_opt_metric_lc_object, tvb, opt_offset, 2, ENC_NA);
                                flag_tree = proto_item_add_subtree(ti_opt, ett_icmpv6_rpl_metric_lc_object);
                                proto_tree_add_item(flag_tree, hf_icmpv6_rpl_opt_metric_lc_object_lc, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                                if (metric_constraint_flags & RPL_METRIC_FLAG_C) {
                                    proto_tree_add_item(flag_tree, hf_icmpv6_rpl_opt_metric_lc_object_reserved, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                                    proto_tree_add_item(flag_tree, hf_icmpv6_rpl_opt_metric_lc_object_flag_i, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                                } else if (metric_constraint_flags & RPL_METRIC_FLAG_R) {
                                    proto_tree_add_item(flag_tree, hf_icmpv6_rpl_opt_metric_lc_object_counter, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                                } else {
                                    expert_add_info(pinfo, ti_opt, &ei_icmpv6_rpl_unknown_metric);
                                }
                                opt_offset += 2;
                            }
                            break;
                        default:
                            expert_add_info(pinfo, ti_opt_len, &ei_icmpv6_rpl_unknown_metric);
                            break;
                    }
                }
                break;
            }
            case RPL_OPT_ROUTING: {
                uint8_t prefix_len;
                ws_in6_addr prefix;
                address prefix_addr;
                uint32_t lifetime;

                static int * const rpl_flags[] = {
                    &hf_icmpv6_rpl_opt_route_pref,
                    &hf_icmpv6_rpl_opt_route_reserved,
                    NULL
                };

                /* Prefix length */
                prefix_len = tvb_get_uint8(tvb, opt_offset);
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_route_prefix_length, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset +=1;

                /* Flags */
                proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_rpl_opt_route_flag,
                                    ett_icmpv6_rpl_flag_routing, rpl_flags, ENC_BIG_ENDIAN);
                opt_offset +=1;

                /* Prefix lifetime. */
                ti_opt = proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_rpl_opt_route_lifetime, tvb, opt_offset, 4, ENC_BIG_ENDIAN, &lifetime);
                if (lifetime != LIFETIME_INFINITY) {
                  proto_item_append_text(ti_opt, " (%s)", unsigned_time_secs_to_str(pinfo->pool, lifetime));
                }
                opt_offset += 4;

                switch(opt_len){
                    case 6: /* Default Option Length without prefix */
                        proto_item_append_text(ti, " ::/%d", prefix_len);
                        break;
                    case 14:
                        memset(&prefix, 0, sizeof(prefix));
                        tvb_memcpy(tvb, (uint8_t *)&prefix.bytes, opt_offset, 8);
                        proto_tree_add_ipv6(icmp6opt_tree, hf_icmpv6_rpl_opt_route_prefix, tvb, opt_offset, 8, &prefix);
                        set_address(&prefix_addr, AT_IPv6, 16, prefix.bytes);
                        proto_item_append_text(ti, " %s/%d", address_to_str(pinfo->pool, &prefix_addr), prefix_len);
                        opt_offset += 8;
                        break;
                    case 22:
                        proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_route_prefix, tvb, opt_offset, 16, ENC_NA);
                        proto_item_append_text(ti, " %s/%d", tvb_ip6_to_str(pinfo->pool, tvb, opt_offset), prefix_len);
                        opt_offset += 16;
                        break;
                    default:
                        expert_add_info(pinfo, ti_opt_len, &ei_icmpv6_invalid_option_length);
                        break;
                }
                break;
            }
            case RPL_OPT_CONFIG: {
                static int * const rpl_config_flags[] = {
                    &hf_icmpv6_rpl_opt_config_reserved,
                    &hf_icmpv6_rpl_opt_config_auth,
                    &hf_icmpv6_rpl_opt_config_pcs,
                    NULL
                };
                proto_item *pi;

                /* Flags */
                proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_rpl_opt_config_flag,
                                    ett_icmpv6_rpl_flag_config, rpl_config_flags, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* DIOIntervalDoublings */
                pi = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_config_doublings, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                proto_item_append_text(pi, " (Imax=%.0fms)", pow(2, tvb_get_uint8(tvb, opt_offset + 1) + tvb_get_uint8(tvb, opt_offset)));
                opt_offset += 1;

                /* DIOIntervalMin */
                pi = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_config_min_interval, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                proto_item_append_text(pi, " (Imin=%.0fms)", pow(2, tvb_get_uint8(tvb, opt_offset)));
                opt_offset += 1;

                /* DIORedundancyConstant */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_config_redundancy, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* MaxRankIncrease */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_config_rank_incr, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                opt_offset += 2;

                /* MinHopRankInc */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_config_hop_rank_inc, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                opt_offset += 2;

                /* OCP */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_config_ocp, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                opt_offset += 2;

                /* Reserved */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_config_rsv, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Default Lifetime */
                pi = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_config_def_lifetime, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                proto_item_append_text(pi, " (%us)", tvb_get_uint8(tvb, opt_offset) * tvb_get_ntohs(tvb, opt_offset + 1));
                opt_offset += 1;

                /* Lifetime Unit */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_config_lifetime_unit, tvb, opt_offset, 2, ENC_BIG_ENDIAN);
                opt_offset += 2;
                break;
            }
            case RPL_OPT_TARGET: {
                uint8_t             prefix_len;
                ws_in6_addr   target_prefix;
                address target_prefix_addr;

                /* Flag */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_target_flag, tvb, opt_offset, 1, ENC_NA);
                opt_offset += 1;

                /* Prefix length */
                prefix_len = tvb_get_uint8(tvb, opt_offset);
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_target_prefix_length, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Target Prefix */

                switch(opt_len){
                    case 2: /* Default Option Length without prefix */
                        proto_item_append_text(ti, " ::/%d", prefix_len);
                        break;
                    case 10:
                        memset(&target_prefix, 0, sizeof(target_prefix));
                        tvb_memcpy(tvb, (uint8_t *)&target_prefix.bytes, opt_offset, 8);
                        proto_tree_add_ipv6(icmp6opt_tree, hf_icmpv6_rpl_opt_target_prefix, tvb, opt_offset, 8, &target_prefix);
                        set_address(&target_prefix_addr, AT_IPv6, 16, target_prefix.bytes);
                        proto_item_append_text(ti, " %s/%d", address_to_str(pinfo->pool, &target_prefix_addr), prefix_len);
                        opt_offset += 8;
                        break;
                    case 18:
                        proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_target_prefix, tvb, opt_offset, 16, ENC_NA);
                        proto_item_append_text(ti, " %s/%d", tvb_ip6_to_str(pinfo->pool, tvb, opt_offset), prefix_len);
                        opt_offset += 16;
                        break;
                    default:
                        expert_add_info(pinfo, ti_opt_len, &ei_icmpv6_invalid_option_length);
                        break;
                }
                break;
            }
            case RPL_OPT_TRANSIT: {
                static int * const rpl_transit_flags[] = {
                    &hf_icmpv6_rpl_opt_transit_flag_e,
                    &hf_icmpv6_rpl_opt_transit_flag_i,
                    &hf_icmpv6_rpl_opt_transit_flag_rsv,
                    NULL
                };
                static int * const rpl_transit_pathctl[] = {
                    &hf_icmpv6_rpl_opt_transit_pathctl_pc1,
                    &hf_icmpv6_rpl_opt_transit_pathctl_pc2,
                    &hf_icmpv6_rpl_opt_transit_pathctl_pc3,
                    &hf_icmpv6_rpl_opt_transit_pathctl_pc4,
                    NULL,
                };

                /* Flags */
                proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_rpl_opt_transit_flag,
                                    ett_icmpv6_rpl_flag_transit, rpl_transit_flags, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Path Control */
                proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_rpl_opt_transit_pathctl,
                                    ett_icmpv6_rpl_transit_pathctl, rpl_transit_pathctl, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Path Sequence */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_transit_pathseq, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Path Lifetime */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_transit_pathlifetime, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Option contains parent */
                if(opt_len > 4)
                {
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_transit_parent, tvb, opt_offset, 16, ENC_NA);
                    proto_item_append_text(ti, " %s", tvb_ip6_to_str(pinfo->pool, tvb, opt_offset));
                    opt_offset += 16;
                }

                break;
            }
            case RPL_OPT_SOLICITED: {
                static int * const rpl_solicited_flags[] = {
                    &hf_icmpv6_rpl_opt_solicited_flag_v,
                    &hf_icmpv6_rpl_opt_solicited_flag_i,
                    &hf_icmpv6_rpl_opt_solicited_flag_d,
                    &hf_icmpv6_rpl_opt_solicited_flag_rsv,
                    NULL
                };

                /*Instance ID */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_solicited_instance, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Flags */
                proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_rpl_opt_solicited_flag,
                                    ett_icmpv6_rpl_flag_solicited, rpl_solicited_flags, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* DODAG ID */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_solicited_dodagid, tvb, opt_offset, 16, ENC_NA);
                opt_offset += 16;

                /* Version Number */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_solicited_version, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset += 1;

                break;
            }
            case RPL_OPT_PREFIX: {
                /* Destination prefix option. */
                uint32_t lifetime;
                uint32_t prefix_len;
                static int * const rpl_prefix_flags[] = {
                    &hf_icmpv6_rpl_opt_prefix_flag_l,
                    &hf_icmpv6_rpl_opt_prefix_flag_a,
                    &hf_icmpv6_rpl_opt_prefix_flag_r,
                    &hf_icmpv6_rpl_opt_prefix_flag_rsv,
                    NULL
                };

                /* Prefix length */
                proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_rpl_opt_prefix_length, tvb, opt_offset, 1, ENC_BIG_ENDIAN, &prefix_len);
                opt_offset +=1;

                /* Flags */
                proto_tree_add_bitmask(icmp6opt_tree, tvb, opt_offset, hf_icmpv6_rpl_opt_prefix_flag,
                                    ett_icmpv6_rpl_flag_prefix, rpl_prefix_flags, ENC_BIG_ENDIAN);
                opt_offset += 1;

                /* Valid Lifetime */
                ti_opt = proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_rpl_opt_prefix_vlifetime, tvb, opt_offset, 4, ENC_BIG_ENDIAN, &lifetime);
                if (lifetime != LIFETIME_INFINITY) {
                  proto_item_append_text(ti_opt, " (%s)", unsigned_time_secs_to_str(pinfo->pool, lifetime));
                }
                opt_offset += 4;

                /* Preferred Lifetime */
                ti_opt = proto_tree_add_item_ret_uint(icmp6opt_tree, hf_icmpv6_rpl_opt_prefix_plifetime, tvb, opt_offset, 4, ENC_BIG_ENDIAN, &lifetime);
                if (lifetime != LIFETIME_INFINITY) {
                  proto_item_append_text(ti_opt, " (%s)", unsigned_time_secs_to_str(pinfo->pool, lifetime));
                }
                opt_offset += 4;

                /* 4 reserved bytes. */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_reserved, tvb, opt_offset, 4, ENC_NA);
                opt_offset += 4;

                /* Prefix */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_prefix, tvb, opt_offset, 16, ENC_NA);
                proto_item_append_text(ti, " %s/%d", tvb_ip6_to_str(pinfo->pool, tvb, opt_offset), prefix_len);
                opt_offset += 16;

                break;
            }

            case RPL_OPT_TARGETDESC: {

                /* Descriptor */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_targetdesc, tvb, opt_offset, 4, ENC_BIG_ENDIAN);
                opt_offset += 4;
                break;
            }

            case RPL_OPT_ROUTE_DISCOVERY: {
                int num_of_addr = 0;
                uint8_t flags = 0, compr = 0, addr_len = 0, lt_mr_nh = 0;
                uint8_t addr[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

                /* Flags */
                ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_route_discovery_flag, tvb, opt_offset, 1, ENC_NA);
                flag_tree = proto_item_add_subtree(ti_opt, ett_icmpv6_rpl_route_discovery_flag);

                flags = tvb_get_uint8(tvb, opt_offset);
                compr = flags & RPL_OPT_ROUTE_DISCOVERY_COMPR;

                /* Reply */
                ti_opt_reply = proto_tree_add_item(flag_tree, hf_icmpv6_rpl_opt_route_discovery_reply, tvb, opt_offset, 1, ENC_BIG_ENDIAN);

                /* Hop-by-Hop */
                ti_opt_hop_by_hop = proto_tree_add_item(flag_tree, hf_icmpv6_rpl_opt_route_discovery_hop_by_hop, tvb, opt_offset, 1, ENC_BIG_ENDIAN);

                /* Num of Source Routes */
                ti_opt_num_of_routes = proto_tree_add_item(flag_tree, hf_icmpv6_rpl_opt_route_discovery_num_of_routes, tvb, opt_offset, 1, ENC_BIG_ENDIAN);

                /* Compr */
                proto_tree_add_item(flag_tree, hf_icmpv6_rpl_opt_route_discovery_compr, tvb, opt_offset, 1, ENC_BIG_ENDIAN);
                opt_offset +=1;

                /* Lifetime / MaxRank / NH */
                lt_mr_nh = tvb_get_uint8(tvb, opt_offset);
                ti_opt_lifetime = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_route_discovery_lifetime, tvb, opt_offset, 1, ENC_NA);

                if ((icmp6_code == ICMP6_RPL_P2P_DRO) || (icmp6_code == ICMP6_RPL_P2P_SDRO)) {
                    proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_route_discovery_nh, tvb, opt_offset, 1, ENC_NA);
                } else {
                    ti_opt_mr_nh = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_route_discovery_maxrank, tvb, opt_offset, 1, ENC_NA);
                }

                opt_offset +=1;

                /* add expert and auxiliary info */
                switch (icmp6_code) {
                    case ICMP6_RPL_P2P_SDRO:
                    case ICMP6_RPL_P2P_DRO:

                        if (flags & RPL_OPT_ROUTE_DISCOVERY_R) {
                            expert_add_info(pinfo, ti_opt_reply, &ei_icmpv6_rpl_p2p_dro_rdo_zero);
                        }

                        if (flags & RPL_OPT_ROUTE_DISCOVERY_N) {
                            expert_add_info(pinfo, ti_opt_num_of_routes, &ei_icmpv6_rpl_p2p_dro_rdo_zero);
                        }

                        if (lt_mr_nh & RPL_OPT_ROUTE_DISCOVERY_L) {
                            expert_add_info(pinfo, ti_opt_lifetime, &ei_icmpv6_rpl_p2p_dro_rdo_zero);
                        }

                        break;
                    default:

                        if (flags & RPL_OPT_ROUTE_DISCOVERY_H) {
                            if (!(flags & RPL_OPT_ROUTE_DISCOVERY_R)) {
                                expert_add_info(pinfo, ti_opt_hop_by_hop, &ei_icmpv6_rpl_p2p_hop_by_hop);
                            }

                            if (flags & RPL_OPT_ROUTE_DISCOVERY_N) {
                                expert_add_info(pinfo, ti_opt_num_of_routes, &ei_icmpv6_rpl_p2p_num_of_routes);
                            }
                        }

                        proto_item_append_text(ti_opt_lifetime, " (%u sec)", pow4(uint32_t, (lt_mr_nh & RPL_OPT_ROUTE_DISCOVERY_L) >> 6));

                        if (!(lt_mr_nh & RPL_OPT_ROUTE_DISCOVERY_MR_NH)) {
                            proto_item_append_text(ti_opt_mr_nh, " (Infinity)");
                        }

                        break;
                }

                /* TargetAddr */
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_route_discovery_target_addr, tvb, opt_offset, 16, ENC_NA);
                opt_offset +=16;

                addr_len = (16 - compr);
                num_of_addr = (opt_len - 18) / addr_len;

                /* Address Vector */
                ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_rpl_opt_route_discovery_addr_vec, tvb, opt_offset, (opt_len - 18), ENC_NA);
                flag_tree = proto_item_add_subtree(ti_opt, ett_icmpv6_rpl_route_discovery_addr_vec);

                proto_item_append_text(flag_tree, " (%d Address%s)", num_of_addr, num_of_addr != 1 ? "es" : "");

                while (num_of_addr--) {
                    memset(addr, 0, sizeof(addr));
                    tvb_memcpy(tvb, addr + compr, opt_offset, addr_len);
                    proto_tree_add_ipv6(flag_tree, hf_icmpv6_rpl_opt_route_discovery_addr_vec_addr, tvb, opt_offset, addr_len, (ws_in6_addr *)addr);
                    opt_offset += addr_len;
                }

                break;
            }
            default :
                expert_add_info_format(pinfo, ti, &ei_icmpv6_undecoded_rpl_option,
                                       "Dissector for ICMPv6 RPL Option"
                                       " (%d) code not implemented, Contact"
                                       " Wireshark developers if you want this supported", opt_type);
                proto_tree_add_item(icmp6opt_tree, hf_icmpv6_data, tvb, opt_offset, opt_len, ENC_NA);
                opt_offset += opt_len;
                break;
        } /* switch (opt_type) */

        offset += opt_len + 2;

        if(offset > opt_offset){
            ti_opt = proto_tree_add_item(icmp6opt_tree, hf_icmpv6_unknown_data, tvb, opt_offset, offset - opt_offset, ENC_NA);
            expert_add_info(pinfo, ti_opt, &ei_icmpv6_unknown_data);
        }

        /* Close the ) to option root label */
        proto_item_append_text(ti, ")");
    } /* while */
    return offset;
}

static int
dissect_rpl_control(tvbuff_t *tvb, int rpl_offset, packet_info *pinfo _U_, proto_tree *icmp6_tree, uint8_t icmp6_type _U_, uint8_t icmp6_code)
{
    proto_item *ti;

    /* Secure RPL ? (ICMP Code start to 0x8x) */
    if(icmp6_code & ICMP6_RPL_SECURE)
    {
        uint8_t kim, lvl;
        static int * const rpl_secure_flags[] = {
            &hf_icmpv6_rpl_secure_flag_t,
            &hf_icmpv6_rpl_secure_flag_rsv,
            NULL
        };
        static int * const rpl_secure_flags2[] = {
            &hf_icmpv6_rpl_secure_kim,
            &hf_icmpv6_rpl_secure_lvl,
            &hf_icmpv6_rpl_secure_rsv,
            NULL
        };

        /* Flags */
        proto_tree_add_bitmask(icmp6_tree, tvb, rpl_offset, hf_icmpv6_rpl_secure_flag,
                            ett_icmpv6_flag_secure, rpl_secure_flags, ENC_BIG_ENDIAN);
        rpl_offset += 1;

        /* Algorithm */
        proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_secure_algorithm, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
        rpl_offset += 1;

        /* KIM & LVL */
        proto_tree_add_bitmask(icmp6_tree, tvb, rpl_offset, hf_icmpv6_rpl_secure_flag,
                            ett_icmpv6_flag_secure, rpl_secure_flags2, ENC_BIG_ENDIAN);
        kim = tvb_get_uint8(tvb, rpl_offset) & RPL_SECURE_KIM >> 6;
        lvl = tvb_get_uint8(tvb, rpl_offset) & RPL_SECURE_LVL;
        rpl_offset += 1;

        /* Flags */
        proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_secure_flag, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
        rpl_offset += 1;

        /* Counter */
        proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_secure_counter, tvb, rpl_offset, 4, ENC_BIG_ENDIAN);
        rpl_offset += 4;

        /*  Key Identifier */
        switch(kim){
            case 0:
            {
                proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_secure_key_index, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
                rpl_offset += 1;
                break;
            }
            case 1:
            {
                /* No Key Identifier */
                break;
            }
            case 2:
            {
                proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_secure_key_source, tvb, rpl_offset, 8, ENC_NA);
                rpl_offset += 8;
                proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_secure_key_index, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
                rpl_offset += 1;
                break;
            }
            case 3:
            {
                if(lvl == 1 || lvl == 3)
                {
                    proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_secure_key_source, tvb, rpl_offset, 8, ENC_NA);
                    rpl_offset += 8;
                    proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_secure_key_index, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
                    rpl_offset += 1;
                }
                break;
            }

        }

    }
    switch(icmp6_code){
        case ICMP6_RPL_DIS: /* DODAG Information Solicitation (0) */
        case ICMP6_RPL_SDIS: /* Secure DODAG Information Solicitation (128) */
        {
            /* Flags */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dis_flag, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Reserved */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, rpl_offset, 1, ENC_NA);
            rpl_offset += 1;

            /* RPL Options */
            rpl_offset = dissect_icmpv6_rpl_opt(tvb, rpl_offset, pinfo, icmp6_tree, icmp6_code);
            break;
        }
        case ICMP6_RPL_DIO: /* DODAG Information Object (1) */
        case ICMP6_RPL_SDIO: /* Secure DODAG Information Object (129) */
        {
            static int * const rpl_dio_flags[] = {
                &hf_icmpv6_rpl_dio_flag_g,
                &hf_icmpv6_rpl_dio_flag_0,
                &hf_icmpv6_rpl_dio_flag_mop,
                &hf_icmpv6_rpl_dio_flag_prf,
                NULL
            };

            /* RPLInstanceID */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dio_instance, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Version Number */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dio_version, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Rank */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dio_rank, tvb, rpl_offset, 2, ENC_BIG_ENDIAN);
            rpl_offset += 2;

            /* Flags */
            proto_tree_add_bitmask(icmp6_tree, tvb, rpl_offset, hf_icmpv6_rpl_dio_flag,
                                ett_icmpv6_flag_rpl_dio, rpl_dio_flags, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Destination Advertisement Trigger Sequence Number (DTSN) */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dio_dtsn, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Flags */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dio_flag, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Reserved */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, rpl_offset, 1, ENC_NA);
            rpl_offset += 1;

            /* DODAGID */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dio_dagid, tvb, rpl_offset, 16, ENC_NA);
            rpl_offset += 16;

            /* RPL Options */
            rpl_offset = dissect_icmpv6_rpl_opt(tvb, rpl_offset, pinfo, icmp6_tree, icmp6_code);
            break;
        }
        case ICMP6_RPL_DAO: /* Destination Advertisement Object (2) */
        case ICMP6_RPL_SDAO: /* Secure Destination Advertisement Object (130) */
        {
            uint8_t flags;
            static int * const rpl_dao_flags[] = {
                &hf_icmpv6_rpl_dao_flag_k,
                &hf_icmpv6_rpl_dao_flag_d,
                &hf_icmpv6_rpl_dao_flag_rsv,
                NULL
            };

            /* DAO Instance */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dao_instance, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Flags */
            proto_tree_add_bitmask(icmp6_tree, tvb, rpl_offset, hf_icmpv6_rpl_dao_flag,
                                ett_icmpv6_flag_rpl_dao, rpl_dao_flags, ENC_BIG_ENDIAN);
            flags = tvb_get_uint8(tvb, rpl_offset);
            rpl_offset += 1;

            /* Reserved */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, rpl_offset, 1, ENC_NA);
            rpl_offset += 1;

            /* Sequence */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dao_sequence, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* DODAGID */
            if(flags & RPL_DAO_FLAG_D)
            {
                proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dao_dodagid, tvb, rpl_offset, 16, ENC_NA);
                rpl_offset += 16;
            }
            /* Options */
            rpl_offset = dissect_icmpv6_rpl_opt(tvb, rpl_offset, pinfo, icmp6_tree, icmp6_code);
            break;
        }
        case ICMP6_RPL_DAOACK: /* Destination Advertisement Object Acknowledgment (3) */
        case ICMP6_RPL_SDAOACK: /* Secure Destination Advertisement Object Acknowledgment (131) */
        {
            uint8_t flags;
            static int * const rpl_daoack_flags[] = {
                &hf_icmpv6_rpl_daoack_flag_d,
                &hf_icmpv6_rpl_daoack_flag_rsv,
                NULL
            };

            /* DAO Instance */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_daoack_instance, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Flags */
            proto_tree_add_bitmask(icmp6_tree, tvb, rpl_offset, hf_icmpv6_rpl_daoack_flag,
                                ett_icmpv6_flag_rpl_daoack, rpl_daoack_flags, ENC_BIG_ENDIAN);
            flags = tvb_get_uint8(tvb, rpl_offset);
            rpl_offset += 1;

            /* DAO Sequence */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_daoack_sequence, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Status */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_daoack_status, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* DODAGID */
            if(flags & RPL_DAOACK_FLAG_D)
            {
                proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_daoack_dodagid, tvb, rpl_offset, 16, ENC_NA);
                rpl_offset += 16;
            }

            /* Options */
            rpl_offset = dissect_icmpv6_rpl_opt(tvb, rpl_offset, pinfo, icmp6_tree, icmp6_code);
            break;
        }
        case ICMP6_RPL_DCO: /* Destination Cleanup Object (7) */

        {
            uint8_t flags;
            static int * const rpl_dco_flags[] = {
                &hf_icmpv6_rpl_dco_flag_k,
                &hf_icmpv6_rpl_dco_flag_d,
                &hf_icmpv6_rpl_dco_flag_rsv,
                NULL
            };

            /* DCO Instance */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dco_instance, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Flags */
            proto_tree_add_bitmask(icmp6_tree, tvb, rpl_offset, hf_icmpv6_rpl_dco_flags,
                                ett_icmpv6_flag_rpl_dco, rpl_dco_flags, ENC_BIG_ENDIAN);
            flags = tvb_get_uint8(tvb, rpl_offset);
            rpl_offset += 1;

            /* RPL status */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dco_status, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Sequence */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dco_sequence, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* DODAGID */
            if(flags & RPL_DCO_FLAG_D)
            {
                proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dco_dodagid, tvb, rpl_offset, 16, ENC_NA);
                rpl_offset += 16;
            }
            /* Options */
            rpl_offset = dissect_icmpv6_rpl_opt(tvb, rpl_offset, pinfo, icmp6_tree, icmp6_code);
            break;
        }
        case ICMP6_RPL_DCOACK: /* Destination Advertisement Object Acknowledgment (8) */

        {
            uint8_t flags;
            static int * const rpl_dcoack_flags[] = {
                &hf_icmpv6_rpl_dcoack_flag_d,
                &hf_icmpv6_rpl_dcoack_flag_rsv,
                NULL
            };

            /* DCO Instance */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dcoack_instance, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Flags */
            proto_tree_add_bitmask(icmp6_tree, tvb, rpl_offset, hf_icmpv6_rpl_dcoack_flag,
                                ett_icmpv6_flag_rpl_dcoack, rpl_dcoack_flags, ENC_BIG_ENDIAN);
            flags = tvb_get_uint8(tvb, rpl_offset);
            rpl_offset += 1;

            /* DCO Sequence */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dcoack_sequence, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Status */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dcoack_status, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* DODAGID */
            if(flags & RPL_DCOACK_FLAG_D)
            {
                proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_dcoack_dodagid, tvb, rpl_offset, 16, ENC_NA);
                rpl_offset += 16;
            }

            /* Options */
            rpl_offset = dissect_icmpv6_rpl_opt(tvb, rpl_offset, pinfo, icmp6_tree, icmp6_code);
            break;
        }
       case ICMP6_RPL_CC:
       {
            static int * const rpl_cc_flags[] = {
                &hf_icmpv6_rpl_cc_flag_r,
                &hf_icmpv6_rpl_cc_flag_rsv,
                NULL
            };

            /* CC Instance */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_cc_instance, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Flags */
            proto_tree_add_bitmask(icmp6_tree, tvb, rpl_offset, hf_icmpv6_rpl_cc_flag,
                                ett_icmpv6_flag_rpl_cc, rpl_cc_flags, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* CC Nonce */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_cc_nonce, tvb, rpl_offset, 2, ENC_BIG_ENDIAN);
            rpl_offset += 2;

            /* DODAGID */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_cc_dodagid, tvb, rpl_offset, 16, ENC_NA);
            rpl_offset += 16;

            /* Destination Counter */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_cc_destination_counter, tvb, rpl_offset, 4, ENC_BIG_ENDIAN);
            rpl_offset += 4;

            /* Options */
            rpl_offset = dissect_icmpv6_rpl_opt(tvb, rpl_offset, pinfo, icmp6_tree, icmp6_code);
            break;
       }
        case ICMP6_RPL_P2P_DRO: /* P2P Discovery Reply Object (0x4) */
        case ICMP6_RPL_P2P_SDRO: /* Secure P2P Discovery Reply Object (0x84) */
        {
            static int * const rpl_p2p_dro_flags[] = {
                &hf_icmpv6_rpl_p2p_dro_flag_stop,
                &hf_icmpv6_rpl_p2p_dro_flag_ack,
                &hf_icmpv6_rpl_p2p_dro_flag_seq,
                &hf_icmpv6_rpl_p2p_dro_flag_reserved,
                NULL
            };

            /* RPLInstanceID */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_p2p_dro_instance, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Version Number */
            ti = proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_p2p_dro_version, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            if (tvb_get_uint8(tvb, rpl_offset)) {
                expert_add_info(pinfo, ti, &ei_icmpv6_rpl_p2p_dro_zero);
            }
            rpl_offset += 1;

            /* Flags */
            proto_tree_add_bitmask(icmp6_tree, tvb, rpl_offset, hf_icmpv6_rpl_p2p_dro_flag,
                                ett_icmpv6_rpl_p2p_dro_flag, rpl_p2p_dro_flags, ENC_BIG_ENDIAN);
            rpl_offset += 2;

            /* DODAGID */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_p2p_dro_dagid, tvb, rpl_offset, 16, ENC_NA);
            rpl_offset += 16;

            /* RPL Options */
            rpl_offset = dissect_icmpv6_rpl_opt(tvb, rpl_offset, pinfo, icmp6_tree, icmp6_code);
            break;
        }
        case ICMP6_RPL_P2P_DROACK:  /* P2P Discovery Reply Object Acknowledgement (0x5) */
        case ICMP6_RPL_P2P_SDROACK: /* Secure P2P Discovery Reply Object Acknowledgement (0x85) */
        {
            static int * const rpl_p2p_droack_flags[] = {
                &hf_icmpv6_rpl_p2p_droack_flag_seq,
                &hf_icmpv6_rpl_p2p_droack_flag_reserved,
                NULL
            };

            /* RPLInstanceID */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_p2p_dro_instance, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            rpl_offset += 1;

            /* Version Number */
            ti = proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_p2p_dro_version, tvb, rpl_offset, 1, ENC_BIG_ENDIAN);
            if (tvb_get_uint8(tvb, rpl_offset)) {
                expert_add_info(pinfo, ti, &ei_icmpv6_rpl_p2p_dro_zero);
            }
            rpl_offset += 1;

            /* Flags */
            proto_tree_add_bitmask(icmp6_tree, tvb, rpl_offset, hf_icmpv6_rpl_p2p_droack_flag,
                                ett_icmpv6_rpl_p2p_droack_flag, rpl_p2p_droack_flags, ENC_BIG_ENDIAN);
            rpl_offset += 2;

            /* DODAGID */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_rpl_p2p_dro_dagid, tvb, rpl_offset, 16, ENC_NA);
            rpl_offset += 16;
            break;
        }

    }
    return rpl_offset;
}
/* RFC 4620 - IPv6 Node Information Queries */

static int
dissect_nodeinfo(tvbuff_t *tvb, int ni_offset, packet_info *pinfo _U_, proto_tree *tree, uint8_t icmp6_type, uint8_t icmp6_code)
{
    uint16_t    qtype;
    unsigned    used_bytes;
    static int * const ni_flags[] = {
        &hf_icmpv6_ni_flag_g,
        &hf_icmpv6_ni_flag_s,
        &hf_icmpv6_ni_flag_l,
        &hf_icmpv6_ni_flag_c,
        &hf_icmpv6_ni_flag_a,
        &hf_icmpv6_ni_flag_t,
        &hf_icmpv6_ni_flag_rsv,
        NULL
    };

    /* Qtype */
    proto_tree_add_item_ret_uint16(tree, hf_icmpv6_ni_qtype, tvb, ni_offset, 2, ENC_BIG_ENDIAN, &qtype);
    ni_offset += 2;

    /* Flags */
    proto_tree_add_bitmask(tree, tvb, ni_offset, hf_icmpv6_ni_flag,
                        ett_icmpv6_flag_ni, ni_flags, ENC_BIG_ENDIAN);
    ni_offset += 2;

    /* Nonce */
    proto_tree_add_item(tree, hf_icmpv6_ni_nonce, tvb, ni_offset, 8, ENC_BIG_ENDIAN);
    ni_offset += 8;

    /* Data ? */
    if(tvb_reported_length_remaining(tvb, ni_offset) == 0){
        return ni_offset;
    }

    if(icmp6_type == ICMP6_NI_QUERY){
        switch(icmp6_code){
            case ICMP6_NI_SUBJ_IPV6: {
                proto_tree_add_item(tree, hf_icmpv6_ni_query_subject_ipv6, tvb, ni_offset, 16, ENC_NA);
                ni_offset += 16;
                break;
            }
            case ICMP6_NI_SUBJ_FQDN: {
                int fqdn_len;
                const char *fqdn_name;
                used_bytes = get_dns_name(pinfo->pool, tvb, ni_offset, 0, ni_offset, &fqdn_name, &fqdn_len);
                proto_tree_add_string(tree, hf_icmpv6_ni_query_subject_fqdn, tvb, ni_offset, used_bytes,
                    format_text(pinfo->pool, fqdn_name, fqdn_len));
                ni_offset += used_bytes;
                break;
            }
            case ICMP6_NI_SUBJ_IPV4: {
                proto_tree_add_item(tree, hf_icmpv6_ni_query_subject_ipv4, tvb, ni_offset, 4, ENC_BIG_ENDIAN);
                ni_offset += 4;
                break;
            }
        }
    } else { /* It is ICMP6_NI_REPLY */
        switch(qtype){
            case NI_QTYPE_NOOP:
                break;
            case NI_QTYPE_NODENAME: {
                int node_name_len;
                const char *node_name;
                /* TTL */
                proto_tree_add_item(tree, hf_icmpv6_ni_reply_node_ttl, tvb, ni_offset, 4, ENC_BIG_ENDIAN);
                ni_offset += 4;
                /* Data ? */
                if(tvb_reported_length_remaining(tvb, ni_offset) == 0){
                    return ni_offset;
                }
                while(ni_offset < (int)tvb_reported_length(tvb) ) {

                    if(tvb_get_uint8(tvb, ni_offset) == 0){ /* if Zero there is padding, skip the loop */
                        break;
                    }
                    /* Node Name */
                    used_bytes = get_dns_name(pinfo->pool, tvb, ni_offset, 0, ni_offset, &node_name, &node_name_len);
                    proto_tree_add_string(tree, hf_icmpv6_ni_reply_node_name, tvb, ni_offset, used_bytes,
                        format_text(pinfo->pool, node_name, node_name_len));
                    ni_offset += used_bytes;
                }
                break;
            }
            case NI_QTYPE_NODEADDR: {
                while(ni_offset < (int)tvb_reported_length(tvb) ) {
                    /* TTL */
                    proto_tree_add_item(tree, hf_icmpv6_ni_reply_node_ttl, tvb, ni_offset, 4, ENC_BIG_ENDIAN);
                    ni_offset += 4;
                    /* Node Addresses */
                    proto_tree_add_item(tree, hf_icmpv6_ni_reply_node_address, tvb, ni_offset, 16, ENC_NA);
                    ni_offset += 16;
                }
                break;
            }
            case NI_QTYPE_IPV4ADDR: {
                while(ni_offset < (int)tvb_reported_length(tvb) ) {
                    /* TTL */
                    proto_tree_add_item(tree, hf_icmpv6_ni_reply_node_ttl, tvb, ni_offset, 4, ENC_BIG_ENDIAN);
                    ni_offset += 4;
                    /* IPv4 Address */
                    proto_tree_add_item(tree, hf_icmpv6_ni_reply_ipv4_address, tvb, ni_offset, 4, ENC_BIG_ENDIAN);
                    ni_offset += 4;
                }
                break;
            }
        }
    }
    return ni_offset;
}
/* RFC 2894 - Router Renumbering for IPv6 */

static int
dissect_rrenum(tvbuff_t *tvb, int rr_offset, packet_info *pinfo, proto_tree *tree, uint8_t icmp6_type _U_, uint8_t icmp6_code)
{
    proto_tree *mp_tree, *up_tree, *rm_tree;
    proto_item *ti,        *ti_mp,   *ti_up,   *ti_rm;
    static int * const rr_flags[] = {
        &hf_icmpv6_rr_flag_t,
        &hf_icmpv6_rr_flag_r,
        &hf_icmpv6_rr_flag_a,
        &hf_icmpv6_rr_flag_s,
        &hf_icmpv6_rr_flag_p,
        &hf_icmpv6_rr_flag_rsv,
        NULL
    };

    /* Sequence Number */
    proto_tree_add_item(tree, hf_icmpv6_rr_sequencenumber, tvb, rr_offset, 4, ENC_BIG_ENDIAN);
    rr_offset += 4;

    /* Segment Number */
    proto_tree_add_item(tree, hf_icmpv6_rr_segmentnumber, tvb, rr_offset, 1, ENC_BIG_ENDIAN);
    rr_offset += 1;

    /* Flags */
    proto_tree_add_bitmask(tree, tvb, rr_offset, hf_icmpv6_rr_flag,
                        ett_icmpv6_flag_rr, rr_flags, ENC_BIG_ENDIAN);
    rr_offset += 1;

    /* Max Delay */
    proto_tree_add_item(tree, hf_icmpv6_rr_maxdelay, tvb, rr_offset, 2, ENC_BIG_ENDIAN);
    rr_offset += 2;

    /* Reserved */
    proto_tree_add_item(tree, hf_icmpv6_reserved, tvb, rr_offset, 4, ENC_NA);
    rr_offset += 4;

    /* Data ? */
    if(tvb_reported_length_remaining(tvb, rr_offset) == 0){
        return rr_offset;
    }

    if(icmp6_code == ICMP6_ROUTER_RENUMBERING_COMMAND){
        /* Match-Prefix Part */
        uint8_t opcode, matchlen, minlen, maxlen;

        ti_mp = proto_tree_add_item(tree, hf_icmpv6_rr_pco_mp_part, tvb, rr_offset, 24, ENC_NA);
        mp_tree = proto_item_add_subtree(ti_mp, ett_icmpv6_rr_mp);

        /* OpCode */
        proto_tree_add_item_ret_uint8(mp_tree, hf_icmpv6_rr_pco_mp_opcode, tvb, rr_offset, 1, ENC_BIG_ENDIAN, &opcode);
        rr_offset += 1;

        /* OpLength */
        proto_tree_add_item(mp_tree, hf_icmpv6_rr_pco_mp_oplength, tvb, rr_offset, 1, ENC_BIG_ENDIAN);
        rr_offset += 1;

        /* Ordinal */
        proto_tree_add_item(mp_tree, hf_icmpv6_rr_pco_mp_ordinal, tvb, rr_offset, 1, ENC_BIG_ENDIAN);
        rr_offset += 1;

        /* MatchLen  */
        ti = proto_tree_add_item_ret_uint8(mp_tree, hf_icmpv6_rr_pco_mp_matchlen, tvb, rr_offset, 1, ENC_BIG_ENDIAN, &matchlen);
        if (matchlen > 128) {
            expert_add_info(pinfo, ti, &ei_icmpv6_rr_pco_mp_matchlen);
        }
        rr_offset += 1;

        /* MinLen  */
        proto_tree_add_item_ret_uint8(mp_tree, hf_icmpv6_rr_pco_mp_minlen, tvb, rr_offset, 1, ENC_BIG_ENDIAN, &minlen);
        rr_offset += 1;

        /* MaxLen  */
        proto_tree_add_item_ret_uint8(mp_tree, hf_icmpv6_rr_pco_mp_maxlen, tvb, rr_offset, 1, ENC_BIG_ENDIAN, &maxlen);
        rr_offset += 1;

        /* Reserved  */
        proto_tree_add_item(mp_tree, hf_icmpv6_reserved, tvb, rr_offset, 2, ENC_NA);
        rr_offset += 2;

        /* Match Prefix  */
        proto_tree_add_item(mp_tree, hf_icmpv6_rr_pco_mp_matchprefix, tvb, rr_offset, 16, ENC_NA);

        /* Add Info (Prefix, Length...) to Match Prefix Part label */
        proto_item_append_text(ti_mp, ": %s %s/%u (%u-%u)", val_to_str(pinfo->pool, opcode, rr_pco_mp_opcode_val, "Unknown %d"), tvb_ip6_to_str(pinfo->pool, tvb, rr_offset), matchlen, minlen, maxlen);
        rr_offset += 16;

        while ((int)tvb_reported_length(tvb) > rr_offset) {
            /* Use-Prefix Part */
            uint8_t uselen, keeplen;
            uint32_t lifetime;
            static int * const mask_flags[] = {
                &hf_icmpv6_rr_pco_up_flagmask_l,
                &hf_icmpv6_rr_pco_up_flagmask_a,
                &hf_icmpv6_rr_pco_up_flagmask_reserved,
                NULL
            };
            static int * const ra_flags[] = {
                &hf_icmpv6_rr_pco_up_raflags_l,
                &hf_icmpv6_rr_pco_up_raflags_a,
                &hf_icmpv6_rr_pco_up_raflags_reserved,
                NULL
            };
            static int * const up_flags[] = {
                &hf_icmpv6_rr_pco_up_flag_v,
                &hf_icmpv6_rr_pco_up_flag_p,
                &hf_icmpv6_rr_pco_up_flag_reserved,
                NULL
            };

            ti_up = proto_tree_add_item(tree, hf_icmpv6_rr_pco_up_part, tvb, rr_offset, 32, ENC_NA);
            up_tree = proto_item_add_subtree(ti_up, ett_icmpv6_rr_up);

            /* UseLen */
            proto_tree_add_item_ret_uint8(up_tree, hf_icmpv6_rr_pco_up_uselen, tvb, rr_offset, 1, ENC_BIG_ENDIAN, &uselen);
            rr_offset += 1;

            /* KeepLen */
            proto_tree_add_item_ret_uint8(up_tree, hf_icmpv6_rr_pco_up_keeplen, tvb, rr_offset, 1, ENC_BIG_ENDIAN, &keeplen);
            rr_offset += 1;

            /* FlagMask */
            proto_tree_add_bitmask(up_tree, tvb, rr_offset, hf_icmpv6_rr_pco_up_flagmask, ett_icmpv6_rr_up_flag_mask, mask_flags, ENC_BIG_ENDIAN);
            rr_offset += 1;

            /* RaFlags */
            proto_tree_add_bitmask(up_tree, tvb, rr_offset, hf_icmpv6_rr_pco_up_raflags, ett_icmpv6_rr_up_flag_ra, ra_flags, ENC_BIG_ENDIAN);
            rr_offset += 1;

            /* Valid Lifetime */
            ti = proto_tree_add_item_ret_uint(up_tree, hf_icmpv6_rr_pco_up_validlifetime, tvb, rr_offset, 4, ENC_BIG_ENDIAN, &lifetime);
            if (lifetime != LIFETIME_INFINITY) {
              proto_item_append_text(ti, " (%s)", unsigned_time_secs_to_str(pinfo->pool, lifetime));
            }
            rr_offset += 4;

            /* Preferred Lifetime */
            ti = proto_tree_add_item_ret_uint(up_tree, hf_icmpv6_rr_pco_up_preferredlifetime, tvb, rr_offset, 4, ENC_BIG_ENDIAN, &lifetime);
            if (lifetime != LIFETIME_INFINITY) {
              proto_item_append_text(ti, " (%s)", unsigned_time_secs_to_str(pinfo->pool, lifetime));
            }
            rr_offset += 4;

            /* Flags */
            proto_tree_add_bitmask(up_tree, tvb, rr_offset, hf_icmpv6_rr_pco_up_flag, ett_icmpv6_rr_up_flag, up_flags, ENC_BIG_ENDIAN);
            rr_offset += 4;

            /* UsePrefix */
            proto_tree_add_item(up_tree, hf_icmpv6_rr_pco_up_useprefix, tvb, rr_offset, 16, ENC_NA);

            /* Add Info (Prefix, Length...) to Use Prefix Part label */
            proto_item_append_text(ti_up, ": %s/%u (keep %u)", tvb_ip6_to_str(pinfo->pool, tvb, rr_offset), uselen, keeplen);
            rr_offset += 16;
        }

    }else if(icmp6_code == ICMP6_ROUTER_RENUMBERING_RESULT){
        while ((int)tvb_reported_length(tvb) > rr_offset) {
        uint8_t matchlen;
        uint32_t interfaceindex;
        static int * const rm_flags[] = {
            &hf_icmpv6_rr_rm_flag_reserved,
            &hf_icmpv6_rr_rm_flag_b,
            &hf_icmpv6_rr_rm_flag_f,
            NULL
        };
        /* Result Message */

        ti_rm = proto_tree_add_item(tree, hf_icmpv6_rr_rm, tvb, rr_offset, 24, ENC_NA);
        rm_tree = proto_item_add_subtree(ti_rm, ett_icmpv6_rr_rm);

        /* Flags */
        proto_tree_add_bitmask(rm_tree, tvb, rr_offset, hf_icmpv6_rr_rm_flag, ett_icmpv6_rr_rm_flag, rm_flags, ENC_BIG_ENDIAN);
        rr_offset +=2;

        /* Ordinal */
        proto_tree_add_item(rm_tree, hf_icmpv6_rr_rm_ordinal, tvb, rr_offset, 1, ENC_BIG_ENDIAN);
        rr_offset +=1;

        /* MatchLen */
        ti = proto_tree_add_item_ret_uint8(rm_tree, hf_icmpv6_rr_rm_matchedlen, tvb, rr_offset, 1, ENC_BIG_ENDIAN, &matchlen);
        if (matchlen > 128) {
            expert_add_info(pinfo, ti, &ei_icmpv6_rr_pco_mp_matchedlen);
        }
        rr_offset +=1;

        /* InterfaceIndex */
        proto_tree_add_item_ret_uint(rm_tree, hf_icmpv6_rr_rm_interfaceindex, tvb, rr_offset, 4, ENC_BIG_ENDIAN, &interfaceindex);
        rr_offset +=4;

        /* MatchedPrefix */
        proto_tree_add_item(rm_tree, hf_icmpv6_rr_rm_matchedprefix, tvb, rr_offset, 16, ENC_NA);

        /* Add Info (Prefix, Length...) to Use Resultant Message label */
        proto_item_append_text(ti_rm, ": %s/%u (interface %u)", tvb_ip6_to_str(pinfo->pool, tvb, rr_offset), matchlen, interfaceindex);
        rr_offset +=16;
        }
    }
    return rr_offset;
}


static int
dissect_mldrv2( tvbuff_t *tvb, uint32_t offset, packet_info *pinfo _U_, proto_tree *tree )
{
    proto_tree *mar_tree;
    proto_item *ti_mar;
    int         mldr_offset = offset;

    /* Reserved */
    proto_tree_add_item(tree, hf_icmpv6_reserved, tvb, mldr_offset, 2, ENC_NA );
    mldr_offset += 2;

    /* Nr of Mcast Address Records (M) */
    proto_tree_add_item(tree, hf_icmpv6_mldr_nb_mcast_records, tvb, mldr_offset, 2, ENC_BIG_ENDIAN );
    mldr_offset += 2;

    /* Multicast Address Record */
    while(mldr_offset < (int)tvb_reported_length(tvb) ) {
        uint8_t aux_data_len, record_type;
        uint16_t i, nb_sources;

        ti_mar = proto_tree_add_item(tree, hf_icmpv6_mldr_mar, tvb, mldr_offset, -1, ENC_NA);
        mar_tree = proto_item_add_subtree(ti_mar, ett_icmpv6_mar);

        /* Record Type */
        proto_tree_add_item_ret_uint8(mar_tree, hf_icmpv6_mldr_mar_record_type, tvb, mldr_offset, 1, ENC_BIG_ENDIAN, &record_type);
        mldr_offset += 1;

        /* Aux Data Len */
        proto_tree_add_item_ret_uint8(mar_tree, hf_icmpv6_mldr_mar_aux_data_len, tvb, mldr_offset, 1, ENC_BIG_ENDIAN, &aux_data_len);
        mldr_offset += 1;

        /* Number of Sources (N) */
        proto_tree_add_item_ret_uint16(mar_tree, hf_icmpv6_mldr_mar_nb_sources, tvb, mldr_offset, 2, ENC_BIG_ENDIAN, &nb_sources);
        mldr_offset += 2;

        /* Multicast Address */
        proto_tree_add_item(mar_tree, hf_icmpv6_mldr_mar_multicast_address, tvb, mldr_offset, 16, ENC_NA);
        proto_item_append_text(ti_mar, " %s: %s", val_to_str(pinfo->pool, record_type, mldr_record_type_val,"Unknown Record Type (%d)"), tvb_ip6_to_str(pinfo->pool, tvb, mldr_offset));
        mldr_offset += 16;

        /* Source Address */
        for (i=0; i < nb_sources; i++){
            proto_tree_add_item(mar_tree, hf_icmpv6_mldr_mar_source_address, tvb, mldr_offset, 16, ENC_NA);
            mldr_offset += 16;
        }

        /* Auxiliary Data ? */
        if(aux_data_len)
        {
            proto_tree_add_item(mar_tree, hf_icmpv6_mldr_mar_auxiliary_data, tvb, mldr_offset, aux_data_len * 4, ENC_NA);
            mldr_offset += aux_data_len * 4;
        }

        /* Multicast Address Record Length */
        proto_item_set_len(ti_mar, 4 + 16 + (16 * nb_sources) + (aux_data_len * 4));

    }
    return mldr_offset;
}

static int
dissect_mpl_control(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, uint8_t type _U_, uint8_t code)
{
    proto_tree *seed_info_tree, *bm_tree;
    proto_item *ti;
    const int length_of_fixed_part = 2;
    int body_offset = offset;
    uint8_t min_seqno, bm_len, s;
    int remaining, id_len = 0;
    uint16_t seed_info_index = 0;
    char *seed_id = NULL;
    int i, j;
    uint8_t b;

    if (code != 0) {
        /* code must be 0 */
        ti = proto_tree_add_item(tree, hf_icmpv6_unknown_data, tvb, body_offset, 1, ENC_NA);
        expert_add_info_format(pinfo, ti, &ei_icmpv6_unknown_data, "Code must be 0");
        return body_offset;
    }

    remaining = tvb_captured_length_remaining(tvb, body_offset);
    while (remaining >= length_of_fixed_part) {
        seed_info_index++;

        seed_info_tree = proto_tree_add_subtree_format(tree, tvb, body_offset, length_of_fixed_part, ett_icmpv6_mpl_seed_info, NULL,
                                                       "MPL Seed Info: [%u]", seed_info_index);

        min_seqno = tvb_get_uint8(tvb, body_offset);
        proto_tree_add_item(seed_info_tree, hf_icmpv6_mpl_seed_info_min_sequence, tvb, body_offset, 1, ENC_BIG_ENDIAN);
        body_offset++;

        bm_len = tvb_get_uint8(tvb, body_offset) >> 2;
        s = tvb_get_uint8(tvb, body_offset) & 0x03;
        proto_tree_add_item(seed_info_tree, hf_icmpv6_mpl_seed_info_bm_len, tvb, body_offset, 1, ENC_BIG_ENDIAN);
        proto_tree_add_item(seed_info_tree, hf_icmpv6_mpl_seed_info_s, tvb, body_offset, 1, ENC_BIG_ENDIAN);
        body_offset++;

        id_len = mpl_seed_id_code_to_length[s];
        if ((remaining - length_of_fixed_part) < id_len) {
            /* Invalid length; remaining data is too short for Seed ID */
            ti = proto_tree_add_item(seed_info_tree, hf_icmpv6_unknown_data, tvb, body_offset,
                                     remaining - length_of_fixed_part, ENC_NA);
            expert_add_info_format(pinfo, ti, &ei_icmpv6_unknown_data,
                                   "Remaining data, %u bytes, is too short for Seed ID of %u bytes",
                                   remaining - length_of_fixed_part, id_len);
            return remaining - length_of_fixed_part;
        }
        switch (s) {
            case 0:
                seed_id = address_to_str(pinfo->pool, &pinfo->src);
                break;
            case 1:
                seed_id = wmem_strdup_printf(pinfo->pool, "%04x", tvb_get_ntohs(tvb, body_offset));
                break;
            case 2:
                seed_id = tvb_eui64_to_str(pinfo->pool, tvb, body_offset);
                break;
            case 3:
                seed_id = tvb_ip6_to_str(pinfo->pool, tvb, body_offset);
                break;
            default:
                /* not reached */
                break;
        }
        proto_tree_add_string(seed_info_tree, hf_icmpv6_mpl_seed_info_seed_id, tvb, body_offset, id_len, seed_id);
        body_offset += id_len;

        if((remaining - length_of_fixed_part - id_len) < bm_len) {
            /* Invalid length; remaining data is too short for Buffered Messages */
            ti = proto_tree_add_item(seed_info_tree, hf_icmpv6_unknown_data, tvb, body_offset,
                                     remaining - length_of_fixed_part - id_len, ENC_NA);
            expert_add_info_format(pinfo, ti, &ei_icmpv6_unknown_data,
                                   "Remaining data, %u bytes, is too short for Buffered Messages of %u bytes",
                                   remaining - length_of_fixed_part - id_len, bm_len);
            return body_offset - length_of_fixed_part - id_len;
        }

        if (bm_len > 0) {
            bm_tree = proto_tree_add_subtree_format(seed_info_tree, tvb, body_offset, bm_len, ett_icmpv6_mpl_seed_info_bm, NULL,
                                                    "Buffered Messages");
            for (i = 0; i < bm_len; i++) {
                b = tvb_get_uint8(tvb, body_offset + i);
                for (j = 0; j < 8; j++) {
                    if (b & (0x80 >> j)) {
                        /* From RFC 1982: s' = (s + n) modulo (2 ^ SERIAL_BITS), where SERIAL_BITS is 8 */
                        proto_tree_add_uint(bm_tree, hf_icmpv6_mpl_seed_info_sequence, tvb, body_offset + i, 1, (min_seqno + 8 * i + j) % 0x100);
                    }
                }
            }
        }
        body_offset += bm_len;

        remaining = tvb_captured_length_remaining(tvb, body_offset);
    }

    if (remaining != 0) {
        /* Invalid length; there is remaining data after dissecting MPL Control Message */
        ti = proto_tree_add_item(tree, hf_icmpv6_unknown_data, tvb, body_offset, body_offset - offset, ENC_NA);
        expert_add_info_format(pinfo, ti, &ei_icmpv6_unknown_data,
                               "%u bytes data is left after dissecting MPL Control Message", remaining);
    }

    return body_offset;
}

static bool
capture_icmpv6(const unsigned char *pd _U_, int offset _U_, int len _U_, capture_packet_info_t *cpinfo, const union wtap_pseudo_header *pseudo_header _U_)
{
    capture_dissector_increment_count(cpinfo, proto_icmpv6);
    return true;
}

static int
dissect_icmpv6(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
{
    proto_tree         *icmp6_tree = NULL;
    proto_item         *ti         = NULL, *checksum_item = NULL, *code_item = NULL;
    const char         *code_name  = NULL;
    unsigned            length     = 0, reported_length;
    vec_t               cksum_vec[4];
    uint32_t            phdr[2];
    uint16_t            cksum;
    unsigned            offset;
    tvbuff_t           *next_tvb;
    uint8_t             icmp6_type, icmp6_code, icmp6_code_prefix, icmp6_code_suffix;
    icmp_transaction_t *trans      = NULL;
    ws_ip6 *iph = WS_IP6_PTR(data);

    col_set_str(pinfo->cinfo, COL_PROTOCOL, "ICMPv6");
    col_clear(pinfo->cinfo, COL_INFO);

    offset = 0;

    if (tree) {
        ti = proto_tree_add_item(tree, proto_icmpv6, tvb, offset, -1, ENC_NA);
        icmp6_tree = proto_item_add_subtree(ti, ett_icmpv6);

        /* Type */
        ti = proto_tree_add_item(icmp6_tree, hf_icmpv6_type, tvb, offset, 1, ENC_BIG_ENDIAN);
    }
    icmp6_type = tvb_get_uint8(tvb, offset);
    if (!(icmp6_type & 0x80)) {
        expert_add_info(pinfo, ti, &ei_icmpv6_type_error);
    }
    offset += 1;

    col_add_str(pinfo->cinfo, COL_INFO, val_to_str(pinfo->pool, icmp6_type, icmpv6_type_val, "Unknown (%d)"));

    switch (icmp6_type) {
        case ICMP6_MCAST_ROUTER_ADVERT:
            // Code field is reused for Advertisement Interval
            proto_tree_add_item(icmp6_tree, hf_icmpv6_mcast_ra_ad_interval, tvb, offset, 1, ENC_BIG_ENDIAN);
            break;
        case ICMP6_MCAST_ROUTER_SOLICIT:
        case ICMP6_MCAST_ROUTER_TERM:
            // Code field is reserved
            proto_tree_add_item(icmp6_tree, hf_icmpv6_mcast_ra_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
            break;
        default:
            code_item = proto_tree_add_item(icmp6_tree, hf_icmpv6_code, tvb, offset, 1, ENC_BIG_ENDIAN);
    }

    icmp6_code = tvb_get_uint8(tvb, offset);

    /* Split ICMPv6 code into two 4-bit fields for ICMPv6 types which need it */
    icmp6_code_prefix = (icmp6_code & 0xF0) >> 4;
    icmp6_code_suffix = (icmp6_code & 0x0F);

    if(icmp6_type == ICMP6_6LOWPANND_DAR) {
        proto_tree_add_uint(icmp6_tree, hf_icmpv6_da_code_prefix, tvb, offset, 1, icmp6_code_prefix);
        proto_tree_add_uint(icmp6_tree, hf_icmpv6_dar_code_suffix, tvb, offset, 1, icmp6_code_suffix);
        proto_item *pi_csfx = proto_tree_add_uint(icmp6_tree, hf_icmpv6_da_code_suffix, tvb, offset, 1, icmp6_code_suffix);
        proto_item_set_hidden(pi_csfx);
    }
    else if(icmp6_type == ICMP6_6LOWPANND_DAC) {
        proto_tree_add_uint(icmp6_tree, hf_icmpv6_da_code_prefix, tvb, offset, 1, icmp6_code_prefix);
        proto_tree_add_uint(icmp6_tree, hf_icmpv6_dac_code_suffix, tvb, offset, 1, icmp6_code_suffix);
        proto_item *pi_csfx = proto_tree_add_uint(icmp6_tree, hf_icmpv6_da_code_suffix, tvb, offset, 1, icmp6_code_suffix);
        proto_item_set_hidden(pi_csfx);
    }
    offset += 1;

    switch (icmp6_type) {
        case ICMP6_DST_UNREACH:
            code_name = val_to_str_const(icmp6_code, icmpv6_unreach_code_val, "Unknown");
            break;
        case ICMP6_TIME_EXCEEDED:
            code_name = val_to_str(pinfo->pool, icmp6_code, icmpv6_timeex_code_val, "Unknown (%d)");
            break;
        case ICMP6_PARAM_PROB:
            code_name = val_to_str(pinfo->pool, icmp6_code, icmpv6_paramprob_code_val, "Unknown (%d)");
            break;
        case ICMP6_ROUTER_RENUMBERING:
            code_name = val_to_str(pinfo->pool, icmp6_code, icmpv6_rr_code_val, "Unknown (%d)");
            break;
        case ICMP6_NI_QUERY:
            code_name = val_to_str(pinfo->pool, icmp6_code, ni_query_code_val, "Unknown (%d)");
            break;
        case ICMP6_NI_REPLY:
            code_name = val_to_str(pinfo->pool, icmp6_code, ni_reply_code_val, "Unknown (%d)");
            break;
        case ICMP6_RPL_CONTROL:
            code_name = val_to_str(pinfo->pool, icmp6_code, rpl_code_val, "Unknown (%d)");
            break;
        case ICMP6_EXTECHO:
            code_name = val_to_str(pinfo->pool, icmp6_code, ext_echo_req_code_str, "Unknown (%d)");
            break;
        case ICMP6_EXTECHOREPLY:
            code_name = val_to_str(pinfo->pool, icmp6_code, ext_echo_reply_code_str, "Unknown (%d)");
            break;
    }

    if (code_item && code_name) {
        proto_item_append_text(code_item, " (%s)", code_name);
        col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)", code_name);
    }

    /* RFC 4380
     * 2.7.   Teredo UDP Port
     * 5.2.9. Direct IPv6 Connectivity Test  */
    if (pinfo->destport == 3544 && icmp6_type == ICMP6_ECHO_REQUEST) {
        col_set_str(pinfo->cinfo, COL_PROTOCOL, "Teredo");
        col_set_str(pinfo->cinfo, COL_INFO, "Direct IPv6 Connectivity Test");
    }

    cksum = tvb_get_ntohs(tvb, offset);
    length = tvb_captured_length(tvb);
    reported_length = tvb_reported_length(tvb);
    if (!pinfo->fragmented && length >= reported_length && !pinfo->flags.in_error_pkt) {
        /* The packet isn't part of a fragmented datagram, isn't truncated,
         * and we aren't in an ICMP error packet, so we can checksum it.
         */

        /* Set up the fields of the pseudo-header. */
        SET_CKSUM_VEC_PTR(cksum_vec[0], (const uint8_t *)pinfo->src.data, pinfo->src.len);
        SET_CKSUM_VEC_PTR(cksum_vec[1], (const uint8_t *)pinfo->dst.data, pinfo->dst.len);
        phdr[0] = g_htonl(reported_length);
        phdr[1] = g_htonl(IP_PROTO_IPV6_ICMP);
        SET_CKSUM_VEC_PTR(cksum_vec[2], (const uint8_t *)&phdr, 8);
        SET_CKSUM_VEC_TVB(cksum_vec[3], tvb, 0, reported_length);

        proto_tree_add_checksum(icmp6_tree, tvb, 2, hf_icmpv6_checksum, hf_icmpv6_checksum_status, &ei_icmpv6_checksum, pinfo, in_cksum(cksum_vec, 4),
                                ENC_BIG_ENDIAN, PROTO_CHECKSUM_VERIFY|PROTO_CHECKSUM_IN_CKSUM);
    } else {
        checksum_item = proto_tree_add_checksum(icmp6_tree, tvb, 2, hf_icmpv6_checksum, hf_icmpv6_checksum_status, &ei_icmpv6_checksum, pinfo, 0,
                                                ENC_BIG_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
        proto_item_append_text(checksum_item, " [%s]",
            pinfo->flags.in_error_pkt ? "in ICMP error packet" : "fragmented datagram");
    }
    offset += 2;

    if (icmp6_type == ICMP6_ECHO_REQUEST || icmp6_type == ICMP6_ECHO_REPLY) {
        uint16_t identifier, sequence;

        /* Identifier */
        proto_tree_add_item_ret_uint16(icmp6_tree, hf_icmpv6_echo_identifier, tvb, offset, 2, ENC_BIG_ENDIAN, &identifier);
        offset += 2;

        /* Sequence Number */
        if (tree)
            proto_tree_add_item(icmp6_tree, hf_icmpv6_echo_sequence_number, tvb, offset, 2, ENC_BIG_ENDIAN);
        sequence = tvb_get_ntohs(tvb, offset);
        offset += 2;

        col_append_fstr(pinfo->cinfo, COL_INFO, " id=0x%04x, seq=%u",
            identifier, sequence);
        if (iph != NULL) {
            col_append_fstr(pinfo->cinfo, COL_INFO, ", hop limit=%u",
                            iph->ip6_hop);
        }

        if (pinfo->destport == 3544 && icmp6_type == ICMP6_ECHO_REQUEST) {
            /* RFC 4380
             * 2.7.   Teredo UDP Port
             * 5.2.9. Direct IPv6 Connectivity Test
             *
             * TODO: Clarify the nonce:  The RFC states, "(It is recommended to
             * use a random number [the nonce] at least 64 bits long.)"
             *
             * Shouldn't the nonce be at least 8 then?  Why not just use (-1),
             * as it could really be any length, couldn't it?
             */
            proto_tree_add_item(icmp6_tree, hf_icmpv6_nonce, tvb, offset, 4, ENC_NA);
            offset += 4;
        } else {
            if (!pinfo->flags.in_error_pkt) {
                uint32_t conv_key[3];

                conv_key[1] = (uint32_t)((identifier << 16) | sequence);
                conv_key[2] = prefs.strict_conversation_tracking_heuristics ? pinfo->vlan_id : 0;

                if (icmp6_type == ICMP6_ECHO_REQUEST) {
                    conv_key[0] = (uint32_t)cksum;
                    if (conv_key[0] == 0xffff)
                        conv_key[0] = 0;
                    if (pinfo->flags.in_gre_pkt && prefs.strict_conversation_tracking_heuristics)
                        conv_key[0] |= 0x00010000; /* set a bit for "in GRE" */
                    trans = transaction_start(pinfo, icmp6_tree, conv_key);
                } else { /* ICMP6_ECHO_REPLY */
                    uint16_t tmp[2];

                    tmp[0] = ~cksum;
                    tmp[1] = ~0x0100; /* The difference between echo request & reply */
                    SET_CKSUM_VEC_PTR(cksum_vec[0], (uint8_t *)tmp, sizeof(tmp));
                    conv_key[0] = in_cksum(cksum_vec, 1);
                    if (pinfo->flags.in_gre_pkt && prefs.strict_conversation_tracking_heuristics)
                        conv_key[0] |= 0x00010000; /* set a bit for "in GRE" */
                    trans = transaction_end(pinfo, icmp6_tree, conv_key);
                }
            }

            /* Interpret the first 8 or 16 bytes of the Echo data as a timestamp
             * But only if it does look like it's a timestamp.
             */

            nstime_t ts, time_relative;
            int len = get_best_guess_timestamp(tvb, offset, &pinfo->abs_ts, &ts);
            if (len) {
                proto_tree_add_time(icmp6_tree, hf_icmpv6_data_time, tvb, offset, len, &ts);
                nstime_delta(&time_relative, &pinfo->abs_ts, &ts);
                ti = proto_tree_add_time(icmp6_tree, hf_icmpv6_data_time_relative, tvb, offset, len, &time_relative);
                proto_item_set_generated(ti);
                offset += len;
            }
            heur_dtbl_entry_t *hdtbl_entry;
            next_tvb = tvb_new_subset_remaining(tvb, offset);
            bool result = dissector_try_heuristic(icmpv6_heur_subdissector_list, next_tvb, pinfo, tree, &hdtbl_entry, NULL);
            if (!result) {
                offset += call_data_dissector(next_tvb, pinfo, icmp6_tree);
            }
            else {
                offset += tvb_reported_length(next_tvb);
            }
        }
    }

    if (1) { /* There are expert infos buried in here so always execute */
        /* decode... */
        /* FIXME: The following messages MUST have a TTL^WHop-Limit of 255:
                133-137, 141-142, 148-149. Detect this and add expert items. */
        switch (icmp6_type) {
            case ICMP6_DST_UNREACH: /* Destination Unreachable (1) */
            case ICMP6_TIME_EXCEEDED: /* Time Exceeded (3) */
            {
                char orig_datagram_length = tvb_get_uint8(tvb, offset);
                if (orig_datagram_length) {
                  /* RFC 4884 Original datagram length */
                  proto_tree_add_item(icmp6_tree, hf_icmpv6_length, tvb, offset, 1, ENC_NA);
                  offset += 1;
                  proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 3, ENC_NA);
                  offset += 3;
                } else {
                  /* Reserved */
                  proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 4, ENC_NA);
                  offset += 4;
                }

                next_tvb = tvb_new_subset_remaining(tvb, offset);
                int contained_len = dissect_contained_icmpv6(next_tvb, pinfo, icmp6_tree);
                if (orig_datagram_length) {
                  offset += 8 * orig_datagram_length;
                  tvbuff_t * extension_tvb = tvb_new_subset_remaining(tvb, offset);
                  offset += call_dissector(icmp_extension_handle, extension_tvb, pinfo, icmp6_tree);
                } else {
                  offset += contained_len;
                }
                break;
            }
            case ICMP6_PACKET_TOO_BIG: /* Packet Too Big (2) */
                /* MTU */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_mtu, tvb, offset, 4, ENC_BIG_ENDIAN);
                offset += 4;

                next_tvb = tvb_new_subset_remaining(tvb, offset);
                offset += dissect_contained_icmpv6(next_tvb, pinfo, icmp6_tree);
                break;
            case ICMP6_PARAM_PROB: /* Parameter Problem (4) */
                /* MTU */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_pointer, tvb, offset, 4, ENC_BIG_ENDIAN);
                offset += 4;

                next_tvb = tvb_new_subset_remaining(tvb, offset);
                offset += dissect_contained_icmpv6(next_tvb, pinfo, icmp6_tree);
                break;
            case ICMP6_ECHO_REQUEST:    /* Echo Request (128) */
            case ICMP6_ECHO_REPLY:      /* Echo Reply (129) */
                /* Already handled above */
                break;
            case ICMP6_MEMBERSHIP_QUERY: /* Multicast Listener Query (130) */
            case ICMP6_MEMBERSHIP_REPORT: /* Multicast Listener Report (131) */
            case ICMP6_MEMBERSHIP_REDUCTION: /* Multicast Listener Done (132) */
            {
                /* It is MLDv2 packet ? (the min length for a MLDv2 packet is 28) */
                if ((icmp6_type == ICMP6_MEMBERSHIP_QUERY) && (length >= MLDV2_PACKET_MINLEN)) {
                    uint32_t mrc;
                    uint16_t qqi, i, nb_sources;
                    static int * const mld_flags[] = {
                        &hf_icmpv6_mld_flag_s,
                        &hf_icmpv6_mld_flag_qrv,
                        &hf_icmpv6_mld_flag_rsv,
                        NULL
                    };

                    /* Maximum Response Code */
                    mrc = tvb_get_ntohs(tvb, offset);
                    if (mrc >= 32768){
                        mrc = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
                    }
                    proto_tree_add_uint(icmp6_tree, hf_icmpv6_mld_mrc, tvb, offset, 2, mrc);
                    offset += 2;

                    /* Reserved */
                    proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 2, ENC_NA);
                    offset += 2;

                    /* Multicast Address */
                    proto_tree_add_item(icmp6_tree, hf_icmpv6_mld_multicast_address, tvb, offset, 16, ENC_NA);
                    offset += 16;

                    /* Flag */
                    proto_tree_add_bitmask(icmp6_tree, tvb, offset, hf_icmpv6_mld_flag, ett_icmpv6_flag_mld, mld_flags, ENC_BIG_ENDIAN);
                    offset += 1;

                    /* QQI */
                    qqi = tvb_get_uint8(tvb, offset);
                    if (qqi >= 128){
                        qqi = ((qqi & 0x0f) | 0x10) << (((qqi & 0x70) >> 4) + 3);
                    }
                    proto_tree_add_uint(icmp6_tree, hf_icmpv6_mld_qqi, tvb, offset, 1, qqi);
                    offset += 1;

                    /* Number of Sources */
                    proto_tree_add_item_ret_uint16(icmp6_tree, hf_icmpv6_mld_nb_sources, tvb, offset, 2, ENC_BIG_ENDIAN, &nb_sources);
                    offset += 2;

                    /* Source Address */
                    for (i=0; i < nb_sources; i++){
                        proto_tree_add_item(icmp6_tree, hf_icmpv6_mld_source_address, tvb, offset, 16, ENC_NA);
                        offset += 16;
                    }

                }else{ /* It is a MLDv1 Packet */

                    proto_tree_add_item(icmp6_tree, hf_icmpv6_mld_mrd, tvb, offset, 2, ENC_BIG_ENDIAN);
                    offset += 2;

                    /* Reserved */
                    proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 2, ENC_NA);
                    offset += 2;

                    /* Multicast Address */
                    proto_tree_add_item(icmp6_tree, hf_icmpv6_mld_multicast_address, tvb, offset, 16, ENC_NA);
                    offset += 16;
                }
                break;
            }
            case ICMP6_ND_ROUTER_SOLICIT: /* Router Solicitation (133) */
            {
                /* Reserved */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 4, ENC_NA);
                offset += 4;

                /* Show options */
                offset = dissect_icmpv6_nd_opt(tvb, offset, pinfo, icmp6_tree, icmp6_type);
                break;
            }
            case ICMP6_ND_ROUTER_ADVERT: /* Router Advertisement (134) */
            {
                static int * const nd_ra_flags[] = {
                    &hf_icmpv6_nd_ra_flag_m,
                    &hf_icmpv6_nd_ra_flag_o,
                    &hf_icmpv6_nd_ra_flag_h,
                    &hf_icmpv6_nd_ra_flag_prf,
                    &hf_icmpv6_nd_ra_flag_p,
                    &hf_icmpv6_nd_ra_flag_s,
                    &hf_icmpv6_nd_ra_flag_rsv,
                    NULL
                };

                /* Current hop limit */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_nd_ra_cur_hop_limit, tvb, offset, 1, ENC_BIG_ENDIAN);
                offset += 1;

                /* Flags */
                proto_tree_add_bitmask(icmp6_tree, tvb, offset, hf_icmpv6_nd_ra_flag, ett_icmpv6_flag_ra, nd_ra_flags, ENC_BIG_ENDIAN);
                offset += 1;

                /* Router lifetime */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_nd_ra_router_lifetime, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                /* Reachable time */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_nd_ra_reachable_time, tvb, offset, 4, ENC_BIG_ENDIAN);
                offset += 4;

                /* Retrans timer */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_nd_ra_retrans_timer, tvb, offset, 4, ENC_BIG_ENDIAN);
                offset += 4;

                /* Show options */
                offset = dissect_icmpv6_nd_opt(tvb, offset, pinfo, icmp6_tree, icmp6_type);
                break;
            }
            case ICMP6_ND_NEIGHBOR_SOLICIT: /* Neighbor Solicitation (135) */
            {
                /* Reserved */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 4, ENC_NA);
                offset += 4;

                /* Target Address */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_nd_ns_target_address, tvb, offset, 16, ENC_NA);
                col_append_fstr(pinfo->cinfo, COL_INFO, " for %s", tvb_ip6_to_str(pinfo->pool, tvb, offset));

                offset += 16;

                /* Show options */
                offset = dissect_icmpv6_nd_opt(tvb, offset, pinfo, icmp6_tree, icmp6_type);
                break;
            }
            case ICMP6_ND_NEIGHBOR_ADVERT: /* Neighbor Advertisement (136) */
            {
                uint32_t na_flags;
                wmem_strbuf_t *flags_strbuf = wmem_strbuf_create(pinfo->pool);
                static int * const nd_na_flags[] = {
                    &hf_icmpv6_nd_na_flag_r,
                    &hf_icmpv6_nd_na_flag_s,
                    &hf_icmpv6_nd_na_flag_o,
                    &hf_icmpv6_nd_na_flag_rsv,
                    NULL
                };

                /* Flags */
                proto_tree_add_bitmask(icmp6_tree, tvb, offset, hf_icmpv6_nd_na_flag, ett_icmpv6_flag_na, nd_na_flags, ENC_BIG_ENDIAN);
                na_flags = tvb_get_ntohl(tvb, offset);
                offset += 4;

                /* Target Address */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_nd_na_target_address, tvb, offset, 16, ENC_NA);


                if (na_flags & ND_NA_FLAG_R) {
                    wmem_strbuf_append(flags_strbuf, "rtr, ");
                }
                if (na_flags & ND_NA_FLAG_S) {
                    wmem_strbuf_append(flags_strbuf, "sol, ");
                }
                if (na_flags & ND_NA_FLAG_O) {
                    wmem_strbuf_append(flags_strbuf, "ovr, ");
                }
                if (wmem_strbuf_get_len(flags_strbuf) > 2) {
                    wmem_strbuf_truncate(flags_strbuf, wmem_strbuf_get_len(flags_strbuf) - 2);
                } else {
                    wmem_strbuf_truncate(flags_strbuf, 0);
                    wmem_strbuf_append(flags_strbuf, "none");
                }

                col_append_fstr(pinfo->cinfo, COL_INFO, " %s (%s)", tvb_ip6_to_str(pinfo->pool, tvb, offset), wmem_strbuf_get_str(flags_strbuf));
                offset += 16;

                /* Show options */
                offset = dissect_icmpv6_nd_opt(tvb, offset, pinfo, icmp6_tree, icmp6_type);
                break;
            }
            case ICMP6_ND_REDIRECT: /* Redirect Message (137) */
            {
                /* Reserved */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 4, ENC_NA);
                offset += 4;

                /* Target Address */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_nd_rd_target_address, tvb, offset, 16, ENC_NA);
                offset += 16;

                /* Destination Address */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_nd_rd_destination_address, tvb, offset, 16, ENC_NA);
                offset += 16;

                /* Show options */
                offset = dissect_icmpv6_nd_opt(tvb, offset, pinfo, icmp6_tree, icmp6_type);
                break;
            }
            case ICMP6_ROUTER_RENUMBERING: /* Router Renumbering (138) */
            {
                offset = dissect_rrenum(tvb, offset, pinfo, icmp6_tree, icmp6_type, icmp6_code);
                break;
            }
            case ICMP6_NI_QUERY: /* ICMP Node Information Query (139) */
            case ICMP6_NI_REPLY: /* ICMP Node Information Response (140) */
            {
                offset = dissect_nodeinfo(tvb, offset, pinfo, icmp6_tree, icmp6_type, icmp6_code);
                break;
            }
            case ICMP6_IND_SOLICIT: /* Inverse Neighbor Discovery Solicitation Message (141) */
            case ICMP6_IND_ADVERT: /* Inverse Neighbor Discovery Advertisement Message (142) */
            {
                /* Reserved */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 4, ENC_NA);
                offset += 4;

                /* Show options */
                offset = dissect_icmpv6_nd_opt(tvb, offset, pinfo, icmp6_tree, icmp6_type);
                break;
            }
            case ICMP6_MLDV2_REPORT: /* Version 2 Multicast Listener Report (143) */
            {
                offset = dissect_mldrv2( tvb, offset, pinfo, icmp6_tree );
                break;
            }
            case ICMP6_MIP6_DHAAD_REQUEST: /* Home Agent Address Discovery Request Message (144) */
            {
                /* Identifier */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_mip6_identifier, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                /* Reserved */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 2, ENC_NA);
                offset += 2;

                break;
            }
            case ICMP6_MIP6_DHAAD_REPLY: /* Home Agent Address Discovery Reply Message (145) */
            {
                /* Identifier */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_mip6_identifier, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                /* Reserved */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 2, ENC_NA);
                offset += 2;

                /* Show all Home Agent Addresses */
                while(length > offset)
                {
                    proto_tree_add_item(icmp6_tree, hf_icmpv6_mip6_home_agent_address, tvb, offset, 16, ENC_NA);
                    offset += 16;
                }
                break;
            }
            case ICMP6_MIP6_MPS: /* Mobile Prefix Solicitation (146) */
            {
                /* Identifier */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_mip6_identifier, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                /* Reserved */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 2, ENC_NA);
                offset += 2;
                break;
            }
            case ICMP6_MIP6_MPA: /* Mobile Prefix Advertisement (147) */
            {
                static int * const mip6_flags[] = {
                    &hf_icmpv6_mip6_flag_m,
                    &hf_icmpv6_mip6_flag_o,
                    &hf_icmpv6_mip6_flag_rsv,
                    NULL
                };

                /* Identifier */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_mip6_identifier, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                /* Flags */
                proto_tree_add_bitmask(icmp6_tree, tvb, offset, hf_icmpv6_mip6_flag, ett_icmpv6_flag_mip6, mip6_flags, ENC_BIG_ENDIAN);
                offset += 2;

                /* Show options */
                offset = dissect_icmpv6_nd_opt(tvb, offset, pinfo, icmp6_tree, icmp6_type);
                break;
            }
            case ICMP6_CERT_PATH_SOL: /* Certification Path Solicitation Message (148) */
            {

                /* Identifier */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_send_identifier, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                /* Component  */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_send_component, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                /* Show options */
                offset = dissect_icmpv6_nd_opt(tvb, offset, pinfo, icmp6_tree, icmp6_type);
                break;
            }
            case ICMP6_CERT_PATH_AD: /* Certification Path Advertisement Message (149) */
            {

                /* Identifier */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_send_identifier, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                /* All Components */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_send_all_components, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                /* Component  */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_send_component, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                /* Reserved */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 2, ENC_NA);
                offset += 2;

                /* Show options */
                offset = dissect_icmpv6_nd_opt(tvb, offset, pinfo, icmp6_tree, icmp6_type);
                break;
            }
            case ICMP6_EXPERIMENTAL_MOBILITY: /* ICMP messages utilized by experimental mobility protocols (150) */
            case ICMP6_FMIPV6_MESSAGES:  /* FMIPv6 Messages (154)*/
            {
                uint8_t subtype;

                /* Subtype */
                proto_tree_add_item_ret_uint8(icmp6_tree, hf_icmpv6_fmip6_subtype, tvb, offset, 1, ENC_BIG_ENDIAN, &subtype);
                col_append_fstr(pinfo->cinfo, COL_INFO, " (%s)", val_to_str(pinfo->pool, subtype, fmip6_subtype_val, "Unknown (%d)"));
                offset += 1;

                switch(subtype){
                    case FMIP6_SUBTYPE_RTSOLPR:
                    {
                        /* Reserved */
                        proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 1, ENC_NA);
                    }
                    break;
                    case FMIP6_SUBTYPE_PRRTADV:
                    {
                        proto_item_append_text(code_item, " (%s)", val_to_str(pinfo->pool, icmp6_code, fmip6_prrtadv_code_val, "Unknown %d") );
                        /* Reserved */
                        proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 1, ENC_NA);
                    }
                    break;
                    case FMIP6_SUBTYPE_HI:
                    {
                        static int * const fmip6_hi_flags[] = {
                            &hf_icmpv6_fmip6_hi_flag_s,
                            &hf_icmpv6_fmip6_hi_flag_u,
                            &hf_icmpv6_fmip6_hi_flag_reserved,
                            NULL
                        };

                        proto_item_append_text(code_item, " (%s)", val_to_str(pinfo->pool, icmp6_code, fmip6_hi_code_val, "Unknown %d") );
                        /* Flags */
                        proto_tree_add_bitmask(icmp6_tree, tvb, offset, hf_icmpv6_fmip6_hi_flag, ett_icmpv6_flag_fmip6, fmip6_hi_flags, ENC_BIG_ENDIAN);
                    }
                    break;
                    case FMIP6_SUBTYPE_HACK:
                    {
                        proto_item_append_text(code_item, " (%s)", val_to_str(pinfo->pool, icmp6_code, fmip6_hack_code_val, "Unknown %d") );
                        /* Reserved */
                        proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 1, ENC_NA);
                    }
                    break;
                }
                offset +=1;

                /* Identifier */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_fmip6_identifier, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                /* Show options */
                offset = dissect_icmpv6_nd_opt(tvb, offset, pinfo, icmp6_tree, icmp6_type);
                break;
            }
            case ICMP6_MCAST_ROUTER_ADVERT: /* Multicast Router Advertisement (151) */
            {
                /* Query Interval */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_mcast_ra_query_interval, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                /* Robustness Variable */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_mcast_ra_robustness_variable, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;
            }
            case ICMP6_MCAST_ROUTER_SOLICIT: /* Multicast Router Solicitation (152) */
            case ICMP6_MCAST_ROUTER_TERM: /* Multicast Router Termination (153) */
            {
                /* No Action... */
                break;
            }
            case ICMP6_RPL_CONTROL: /* RPL Control (155) */
            {
                /* RPL: RFC 6550 : Routing over Low-Power and Lossy Networks. */
                offset = dissect_rpl_control(tvb, offset, pinfo, icmp6_tree, icmp6_type, icmp6_code);
                break;
            }
            case ICMP6_ILNPV6: /* Locator Update (156) */
            {
                uint8_t nb_locs, i;
                /* Number of locs */
                proto_tree_add_item_ret_uint8(icmp6_tree, hf_icmpv6_ilnp_nb_locs, tvb, offset, 1, ENC_BIG_ENDIAN, &nb_locs);
                offset += 1;

                /* Reserved */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 1, ENC_NA);
                offset += 1;

                /* Reserved */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_reserved, tvb, offset, 2, ENC_NA);
                offset += 2;

                /* Locator / Preference / Lifetime */
                for (i=0; i < nb_locs; i++){
                    proto_tree_add_item(icmp6_tree, hf_icmpv6_ilnp_locator, tvb, offset, 8, ENC_BIG_ENDIAN);
                    offset += 8;

                    proto_tree_add_item(icmp6_tree, hf_icmpv6_ilnp_preference, tvb, offset, 2, ENC_BIG_ENDIAN);
                    offset += 2;

                    proto_tree_add_item(icmp6_tree, hf_icmpv6_ilnp_lifetime, tvb, offset, 2, ENC_BIG_ENDIAN);
                    offset += 2;

                }
                break;
            }
            case ICMP6_6LOWPANND_DAR:
            case ICMP6_6LOWPANND_DAC:
            {
                /* Status */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_da_status, tvb, offset, 1, ENC_BIG_ENDIAN);
                offset += 1;

                /* Reserved */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_da_rsv, tvb, offset, 1, ENC_BIG_ENDIAN);
                offset += 1;

                /* Lifetime */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_da_lifetime, tvb, offset, 2, ENC_BIG_ENDIAN);
                offset += 2;

                switch (icmp6_code_suffix) {

                    case ND_OPT_DA_EDA_64:
                        proto_tree_add_item(icmp6_tree, hf_icmpv6_da_rovr, tvb, offset, 8, ENC_NA);
                        offset += 8;
                        break;

                    case ND_OPT_DA_EDA_128:
                        proto_tree_add_item(icmp6_tree, hf_icmpv6_da_rovr, tvb, offset, 16, ENC_NA);
                        offset += 16;
                        break;

                    case ND_OPT_DA_EDA_192:
                        proto_tree_add_item(icmp6_tree, hf_icmpv6_da_rovr, tvb, offset, 24, ENC_NA);
                        offset += 24;
                        break;

                    case ND_OPT_DA_EDA_256:
                        proto_tree_add_item(icmp6_tree, hf_icmpv6_da_rovr, tvb, offset, 32, ENC_NA);
                        offset += 32;
                        break;

                    default:
                        /* EUI-64 */
                        proto_tree_add_item(icmp6_tree, hf_icmpv6_da_eui64, tvb, offset, 8, ENC_BIG_ENDIAN);
                        offset += 8;
                        break;
                }

                /* Address */
                proto_tree_add_item(icmp6_tree, hf_icmpv6_da_raddr, tvb, offset, 16, ENC_NA);
                offset += 16;
                break;
            }
            case ICMP6_MPL_CONTROL: /* MPL Control (159) */
            {
                /* RFC 7731: Multicast Protocol for Low-Power and Lossy Networks (MPL) */
                offset = dissect_mpl_control(tvb, offset, pinfo, icmp6_tree, icmp6_type, icmp6_code);
                break;
            }

            case ICMP6_EXTECHO: /* Extended Echo - Probe - (RFC8335) */
            {
                proto_tree_add_item(icmp6_tree, hf_icmpv6_echo_identifier, tvb, offset, 2,
                                    ENC_BIG_ENDIAN);
                offset += 2;
                proto_tree_add_item(icmp6_tree, hf_icmpv6_ext_echo_seq_num, tvb, offset, 1,
                                    ENC_BIG_ENDIAN);
                offset += 1;
                proto_tree_add_item(icmp6_tree, hf_icmpv6_ext_echo_req_reserved, tvb, offset, 1,
                                    ENC_BIG_ENDIAN);
                proto_tree_add_item(icmp6_tree, hf_icmpv6_ext_echo_req_local, tvb, offset, 1,
                                    ENC_BIG_ENDIAN);
                offset += 1;

                tvbuff_t * extension_tvb = tvb_new_subset_remaining(tvb, offset);
                offset += call_dissector(icmp_extension_handle, extension_tvb, pinfo, icmp6_tree);
                break;
            }

            case ICMP6_EXTECHOREPLY:
            {
                proto_tree_add_item(icmp6_tree, hf_icmpv6_echo_identifier, tvb, offset, 2,
                                    ENC_BIG_ENDIAN);
                offset += 2;
                proto_tree_add_item(icmp6_tree, hf_icmpv6_ext_echo_seq_num, tvb, offset, 1,
                                    ENC_BIG_ENDIAN);
                offset += 1;
                proto_tree_add_item(icmp6_tree, hf_icmpv6_ext_echo_rsp_state, tvb, offset, 1,
                                    ENC_BIG_ENDIAN);
                proto_tree_add_item(icmp6_tree, hf_icmpv6_ext_echo_rsp_reserved, tvb, offset, 1,
                                    ENC_BIG_ENDIAN);
                proto_tree_add_item(icmp6_tree, hf_icmpv6_ext_echo_rsp_active, tvb, offset, 1,
                                    ENC_BIG_ENDIAN);
                proto_tree_add_item(icmp6_tree, hf_icmpv6_ext_echo_rsp_ipv4, tvb, offset, 1,
                                    ENC_BIG_ENDIAN);
                proto_tree_add_item(icmp6_tree, hf_icmpv6_ext_echo_rsp_ipv6, tvb, offset, 1,
                                    ENC_BIG_ENDIAN);
                offset += 1;
                break;
            }

            default:
                expert_add_info_format(pinfo, ti, &ei_icmpv6_undecoded_type,
                                       "Dissector for ICMPv6 Type (%d)"
                                       " code not implemented, Contact Wireshark"
                                       " developers if you want this supported", icmp6_type);
                proto_tree_add_item(icmp6_tree, hf_icmpv6_data, tvb, offset, -1, ENC_NA);
                break;
        } /* switch (icmp6_type) */
    } /* if (1) */

    if (!PINFO_FD_VISITED(pinfo)) {
        icmp_info_t *p_icmp_info = wmem_new(wmem_file_scope(), icmp_info_t);
        p_icmp_info->type = icmp6_type;
        p_icmp_info->code = icmp6_code;
        p_add_proto_data(wmem_file_scope(), pinfo, proto_icmpv6, 0, p_icmp_info);
    }

    if (trans)
        tap_queue_packet(icmpv6_tap, pinfo, trans);

    return offset;
}

void
proto_register_icmpv6(void)
{
    static hf_register_info hf[] = {
        { &hf_icmpv6_type,
          { "Type", "icmpv6.type", FT_UINT8, BASE_DEC, VALS(icmpv6_type_val), 0x0,
            "Indicates the type of the message", HFILL }},
        { &hf_icmpv6_code,
          { "Code", "icmpv6.code", FT_UINT8, BASE_DEC, NULL, 0x0,
            "Depends on the message type.  It is used to create an additional level of message granularity", HFILL }},
        { &hf_icmpv6_mcast_ra_ad_interval,
          { "Ad. Interval", "icmpv6.mcast_ra.adv_int", FT_UINT8, BASE_DEC|BASE_UNIT_STRING, UNS(&units_seconds), 0x0,
            "Advertisement Interval of MRD Advertisement Packet", HFILL }},
        { &hf_icmpv6_mcast_ra_reserved,
          { "Reserved", "icmpv6.mcast_ra.reserved", FT_UINT8, BASE_DEC, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_checksum,
          { "Checksum", "icmpv6.checksum", FT_UINT16, BASE_HEX, NULL, 0x0,
            "Used to detect data corruption in the ICMPv6 message and parts of the IPv6 header", HFILL }},
        { &hf_icmpv6_checksum_status,
          { "Checksum Status", "icmpv6.checksum.status", FT_UINT8, BASE_NONE, VALS(proto_checksum_vals), 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_reserved,
          { "Reserved", "icmpv6.reserved", FT_BYTES, BASE_NONE, NULL, 0x0,
            "Must be Zero", HFILL }},
        { &hf_icmpv6_data,
          { "Data", "icmpv6.data", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_unknown_data,
          { "Unknown Data", "icmpv6.unknown_data", FT_BYTES, BASE_NONE, NULL, 0x0,
            "Not interpreted Data", HFILL }},
        { &hf_icmpv6_mtu,
          { "MTU", "icmpv6.mtu", FT_UINT32, BASE_DEC, NULL, 0x0,
            "The Maximum Transmission Unit of the next-hop link", HFILL }},
        { &hf_icmpv6_pointer,
          { "Pointer", "icmpv6.pointer", FT_UINT32, BASE_DEC, NULL, 0x0,
            "Identifies the octet offset within the invoking packet where the error was detected", HFILL }},
        { &hf_icmpv6_echo_identifier,
          { "Identifier", "icmpv6.echo.identifier", FT_UINT16, BASE_HEX, NULL, 0x0,
            "An identifier to aid in matching with Request and Reply", HFILL }},
        { &hf_icmpv6_echo_sequence_number,
          { "Sequence", "icmpv6.echo.sequence_number", FT_UINT16, BASE_DEC, NULL, 0x0,
            "A sequence number to aid in matching Echo Replies to this Echo Request", HFILL }},
        { &hf_icmpv6_nonce,
          { "Nonce", "icmpv6.nonce", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_data_time,
          { "Timestamp from Echo data", "icmpv6.data_time",
            FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0x0,
            "The timestamp in the first 8 or 16 bytes of the Echo data",
            HFILL }},
        { &hf_icmpv6_data_time_relative,
          { "Timestamp from Echo data (relative)", "icmpv6.data_time_relative",
            FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
            "The timestamp of the packet, relative to the timestamp in the first 8 or 16 bytes of the Echo data",
            HFILL }},
        /* RFC 2461/4861 : Neighbor Discovery for IP version 6 (IPv6) */
        { &hf_icmpv6_nd_ra_cur_hop_limit,
          { "Cur hop limit", "icmpv6.nd.ra.cur_hop_limit", FT_UINT8, BASE_DEC, NULL, 0x0,
            "The default value that should be placed in the Hop Count field of the IP header for outgoing IP packets", HFILL }},
        { &hf_icmpv6_nd_ra_flag,
          { "Flags", "icmpv6.nd.ra.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_nd_ra_flag_m,
          { "Managed address configuration", "icmpv6.nd.ra.flag.m", FT_BOOLEAN, 8, TFS(&tfs_set_notset), ND_RA_FLAG_M,
            "When set, it indicates that addresses are available via DHCPv6", HFILL }},
        { &hf_icmpv6_nd_ra_flag_o,
          { "Other configuration", "icmpv6.nd.ra.flag.o", FT_BOOLEAN, 8, TFS(&tfs_set_notset), ND_RA_FLAG_O,
            "When set, it indicates that other configuration information is available via DHCPv6", HFILL }},
        { &hf_icmpv6_nd_ra_flag_h,
          { "Home Agent", "icmpv6.nd.ra.flag.h", FT_BOOLEAN, 8, TFS(&tfs_set_notset), ND_RA_FLAG_H,
            "When set, it indicate that the router sending this Router Advertisement is also functioning as a Mobile IPv6 home agent on this link", HFILL }},
        { &hf_icmpv6_nd_ra_flag_prf,
          { "Prf (Default Router Preference)", "icmpv6.nd.ra.flag.prf", FT_UINT8, BASE_DEC, VALS(nd_flag_router_pref), ND_RA_FLAG_PRF,
            "Indicates whether to prefer this router over other default routers", HFILL }},
        { &hf_icmpv6_nd_ra_flag_p,
          { "ND Proxy", "icmpv6.nd.ra.flag.p", FT_BOOLEAN, 8, TFS(&tfs_set_notset), ND_RA_FLAG_P,
            "Neighbor Discovery Proxy (Experimental - RFC4389)" , HFILL }},
          { &hf_icmpv6_nd_ra_flag_s,
          { "SNAC Router", "icmpv6.nd.ra.flag.s", FT_BOOLEAN, 8, TFS(&tfs_set_notset), ND_RA_FLAG_S,
            "Indicates whether the router operates as Stub Network Auto-Configuring (SNAC) router" , HFILL }},
        { &hf_icmpv6_nd_ra_flag_rsv,
          { "Reserved", "icmpv6.nd.ra.flag.rsv", FT_UINT8, BASE_DEC, NULL, ND_RA_FLAG_RSV,
            "Must be Zero", HFILL }},
        { &hf_icmpv6_nd_ra_router_lifetime,
          { "Router lifetime (s)", "icmpv6.nd.ra.router_lifetime", FT_UINT16, BASE_DEC, NULL, 0x0,
            "The lifetime associated with the default router", HFILL }},
        { &hf_icmpv6_nd_ra_reachable_time,
          { "Reachable time (ms)", "icmpv6.nd.ra.reachable_time", FT_UINT32, BASE_DEC, NULL, 0x0,
            "The time that a node assumes a neighbor is reachable after having received a reachability confirmation", HFILL }},
        { &hf_icmpv6_nd_ra_retrans_timer,
          { "Retrans timer (ms)", "icmpv6.nd.ra.retrans_timer", FT_UINT32, BASE_DEC, NULL, 0x0,
            "The time between retransmitted Neighbor Solicitation messages", HFILL }},
        { &hf_icmpv6_nd_ns_target_address,
          { "Target Address", "icmpv6.nd.ns.target_address", FT_IPv6, BASE_NONE, NULL, 0x0,
            "The IP address of the target of the solicitation", HFILL }},
        { &hf_icmpv6_nd_na_flag,
          { "Flags", "icmpv6.nd.na.flag", FT_UINT32, BASE_HEX, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_nd_na_flag_r,
          { "Router", "icmpv6.nd.na.flag.r", FT_BOOLEAN, 32, TFS(&tfs_set_notset), ND_NA_FLAG_R,
            "When set, it indicates that the sender is a router", HFILL }},
        { &hf_icmpv6_nd_na_flag_s,
          { "Solicited", "icmpv6.nd.na.flag.s", FT_BOOLEAN, 32, TFS(&tfs_set_notset), ND_NA_FLAG_S,
            "When set, it indicates that the advertisement was sent in response to a Neighbor Solicitation from the Destination address", HFILL }},
        { &hf_icmpv6_nd_na_flag_o,
          { "Override", "icmpv6.nd.na.flag.o", FT_BOOLEAN, 32, TFS(&tfs_set_notset), ND_NA_FLAG_O,
            "When set, it indicates that the advertisement should override an existing cache entry and update the cached link-layer address", HFILL }},
        { &hf_icmpv6_nd_na_flag_rsv,
          { "Reserved", "icmpv6.nd.na.flag.rsv", FT_UINT32, BASE_DEC, NULL, ND_NA_FLAG_RSV,
            "Must be Zero", HFILL }},
        { &hf_icmpv6_nd_na_target_address,
          { "Target Address", "icmpv6.nd.na.target_address", FT_IPv6, BASE_NONE, NULL, 0x0,
            "the Target Address field in the Neighbor Solicitation message that prompted this advertisement", HFILL }},
        { &hf_icmpv6_nd_rd_target_address,
          { "Target Address", "icmpv6.nd.rd.target_address", FT_IPv6, BASE_NONE, NULL, 0x0,
            "An IP address that is a better first hop to use for the ICMP Destination Address", HFILL }},
        { &hf_icmpv6_nd_rd_destination_address,
          { "Destination Address", "icmpv6.rd.na.destination_address", FT_IPv6, BASE_NONE, NULL, 0x0,
            "The IP address of the destination that is redirected to the target", HFILL }},
        { &hf_icmpv6_opt,
          { "ICMPv6 Option", "icmpv6.opt", FT_NONE, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_type,
          { "Type", "icmpv6.opt.type", FT_UINT8, BASE_DEC, VALS(option_vals), 0x0,
            "Options type", HFILL }},
        { &hf_icmpv6_opt_length,
          { "Length", "icmpv6.opt.length", FT_UINT8, BASE_DEC, NULL, 0x0,
            "The length (in units of 8 bytes) of the option (including the Type and Length fields)", HFILL }},
        { &hf_icmpv6_opt_reserved,
          { "Reserved", "icmpv6.opt.reserved", FT_NONE, BASE_NONE, NULL, 0x0,
            "Reserved (Must be 0)", HFILL }},
        { &hf_icmpv6_opt_padding,
          { "Padding", "icmpv6.opt.padding", FT_NONE, BASE_NONE, NULL, 0x0,
            "Padding (Must be 0)", HFILL }},
        { &hf_icmpv6_opt_linkaddr,
          { "Link-layer address", "icmpv6.opt.linkaddr", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
       { &hf_icmpv6_opt_src_linkaddr,
          { "Source Link-layer address", "icmpv6.opt.src_linkaddr", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
       { &hf_icmpv6_opt_target_linkaddr,
          { "Target Link-layer address", "icmpv6.opt.target_linkaddr", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_linkaddr_mac,
          { "Link-layer address", "icmpv6.opt.linkaddr", FT_ETHER, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
       { &hf_icmpv6_opt_src_linkaddr_mac,
          { "Source Link-layer address", "icmpv6.opt.src_linkaddr", FT_ETHER, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
       { &hf_icmpv6_opt_target_linkaddr_mac,
          { "Target Link-layer address", "icmpv6.opt.target_linkaddr", FT_ETHER, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_linkaddr_eui64,
          { "Link-layer address", "icmpv6.opt.linkaddr_eui64", FT_EUI64, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
       { &hf_icmpv6_opt_src_linkaddr_eui64,
          { "Source Link-layer address", "icmpv6.opt.src_linkaddr_eui64", FT_EUI64, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
       { &hf_icmpv6_opt_target_linkaddr_eui64,
          { "Target Link-layer address", "icmpv6.opt.target_linkaddr_eui64", FT_EUI64, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_prefix_len,
          { "Prefix Length", "icmpv6.opt.prefix.length", FT_UINT8, BASE_DEC, NULL, 0x0,
            "The number of leading bits in the Prefix that are valid", HFILL }},
        { &hf_icmpv6_opt_prefix_flag,
          { "Flag", "icmpv6.opt.prefix.flag", FT_UINT8, BASE_HEX, NULL, 0x00,
            NULL, HFILL }},
        { &hf_icmpv6_opt_prefix_flag_l,
          { "On-link Flag (L)", "icmpv6.opt.prefix.flag.l", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x80,
            "When set, indicates that this prefix can be used for on-link determination, and traffic to those destinations is sent directly (not via routers)", HFILL }},
        { &hf_icmpv6_opt_prefix_flag_a,
          { "Autonomous Address Configuration Flag (A)", "icmpv6.opt.prefix.flag.a", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x40,
            "When set, indicates that this prefix can be used for stateless address configuration", HFILL }},
        { &hf_icmpv6_opt_prefix_flag_r,
          { "Router Address Flag (R)", "icmpv6.opt.prefix.flag.r", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x20,
            "When set, indicates that the Prefix field contains a complete IP address assigned to the sending router", HFILL }},
        { &hf_icmpv6_opt_prefix_flag_p,
          { "DHCPv6-PD Preferred Flag (P)", "icmpv6.opt.prefix.flag.p", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x10,
            "When set, indicates that the network prefers that clients use Prefix Delegation (PD) instead of acquiring individual addresses via SLAAC or DHCPv6 address assignment.", HFILL }},
        { &hf_icmpv6_opt_prefix_flag_reserved,
          { "Reserved", "icmpv6.opt.prefix.flag.reserved", FT_UINT8, BASE_DEC, NULL, 0xf,
            NULL, HFILL }},
        { &hf_icmpv6_opt_prefix_valid_lifetime,
          { "Valid Lifetime", "icmpv6.opt.prefix.valid_lifetime", FT_UINT32, BASE_DEC|BASE_SPECIAL_VALS, VALS(unique_infinity), 0x00,
            "The length of time in seconds that the prefix is valid for the purpose of on-link determination", HFILL }},
        { &hf_icmpv6_opt_prefix_preferred_lifetime,
          { "Preferred Lifetime", "icmpv6.opt.prefix.preferred_lifetime", FT_UINT32, BASE_DEC|BASE_SPECIAL_VALS, VALS(unique_infinity), 0x00,
            "The length of time in seconds that addresses generated from the prefix via stateless address autoconfiguration remain preferred", HFILL }},
        { &hf_icmpv6_opt_prefix,
          { "Prefix", "icmpv6.opt.prefix", FT_IPv6, BASE_NONE, NULL, 0x00,
            "An IP address or a prefix of an IP address", HFILL }},
        { &hf_icmpv6_opt_cga_pad_len,
          { "Pad Length", "icmpv6.opt.cga.pad_length", FT_UINT8, BASE_DEC, NULL, 0x0,
            "Pad Length (in bytes)", HFILL }},
        { &hf_icmpv6_opt_cga,
          { "CGA", "icmpv6.opt.cga", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_cga_modifier,
          { "Modifier", "icmpv6.opt.cga.modifier", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_cga_subnet_prefix,
          { "Subnet Prefix", "icmpv6.opt.cga.subnet_prefix", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_cga_count,
          { "Count", "icmpv6.opt.cga.count", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_cga_subject_public_key_info,
          { "Subject Public Key Info", "icmpv6.opt.cga.subject_public_key_info", FT_NONE, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_cga_ext_type,
          { "Ext Type", "icmpv6.opt.cga.ext_type", FT_UINT16, BASE_DEC, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_cga_ext_length,
          { "Ext Length", "icmpv6.opt.cga.ext_length", FT_UINT16, BASE_DEC, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_cga_ext_data,
          { "Ext Data", "icmpv6.opt.cga.ext_data", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_rsa_key_hash,
          { "Key Hash", "icmpv6.opt.rsa.key_hash", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_digital_signature_padding,
          { "Digital Signature and Padding", "icmpv6.opt.digital_signature_padding", FT_NONE, BASE_NONE, NULL, 0x0,
            "TO DO FIX ME !!", HFILL }},
        { &hf_icmpv6_opt_ps_key_hash,
          { "Key Hash", "icmpv6.opt.ps.key_hash", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_timestamp,
          { "Timestamp", "icmpv6.opt.timestamp", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0x0,
            "The value indicates the number of seconds since January 1, 1970, 00:00 UTC", HFILL }},
        { &hf_icmpv6_opt_nonce,
          { "Nonce", "icmpv6.opt.nonce", FT_BYTES, BASE_NONE, NULL, 0x0,
            "A field containing a random number selected by the sender of the solicitation message", HFILL }},
        { &hf_icmpv6_opt_certificate_padding,
          { "Certificate and Padding", "icmpv6.opt.certificate_padding", FT_NONE, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_ipa_option_code,
          { "Option-code", "icmpv6.opt.ipa.option_code", FT_UINT8, BASE_DEC, VALS(nd_opt_ipa_option_code_val), 0x00,
            NULL, HFILL }},
        { &hf_icmpv6_opt_ipa_prefix_len,
          { "Prefix Length", "icmpv6.opt.ipa.prefix_len", FT_UINT8, BASE_DEC, NULL, 0x00,
            "That indicates the length of the IPv6 Address Prefix", HFILL }},
        { &hf_icmpv6_opt_ipa_ipv6_address,
          { "IPv6 Address", "icmpv6.opt.ipa.ipv6_address", FT_IPv6, BASE_NONE, NULL, 0x00,
            "The IP address/prefix defined by the Option-Code field", HFILL }},
        { &hf_icmpv6_opt_nrpi_option_code,
          { "Option-code", "icmpv6.opt.nrpi.option_code", FT_UINT8, BASE_DEC, NULL, 0x00,
            NULL, HFILL }},
        { &hf_icmpv6_opt_nrpi_prefix_len,
          { "Prefix Length", "icmpv6.opt.nrpi.prefix_len", FT_UINT8, BASE_DEC, NULL, 0x00,
            "The number of leading bits in the Prefix that are valid", HFILL }},
        { &hf_icmpv6_opt_nrpi_prefix,
          { "Prefix", "icmpv6.opt.nrpi.prefix", FT_IPv6, BASE_NONE, NULL, 0x00,
            "An IP address or a prefix of an IP address", HFILL }},
        { &hf_icmpv6_opt_lla_option_code,
          { "Option-code", "icmpv6.opt.lla.option_code", FT_UINT8, BASE_DEC, VALS(nd_opt_lla_option_code_val), 0x00,
            NULL, HFILL }},
        { &hf_icmpv6_opt_lla_bytes,
          { "Link-Layer Address", "icmpv6.opt.lla.bytes", FT_BYTES, BASE_NONE, NULL, 0x00,
            "(in Bytes Format)", HFILL }},
        { &hf_icmpv6_opt_naack_option_code,
          { "Option-Code", "icmpv6.opt.naack.option_code", FT_UINT8, BASE_DEC, NULL, 0x00,
            NULL, HFILL }},
        { &hf_icmpv6_opt_naack_status,
          { "Status", "icmpv6.opt.naack.status", FT_UINT8, BASE_DEC, VALS(nd_opt_naack_status_val), 0x00,
            "Indicating the disposition of the Unsolicited Neighbor Advertisement message", HFILL }},
        { &hf_icmpv6_opt_naack_supplied_ncoa,
          { "Supplied NCoA", "icmpv6.opt.naack.supplied_ncoa", FT_IPv6, BASE_NONE, NULL, 0x00,
            NULL, HFILL }},

        { &hf_icmpv6_opt_pvd_id_flags,
          { "Flags", "icmpv6.opt.pvd_id.flags", FT_UINT16, BASE_HEX, NULL, 0xFFF0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_pvd_id_flags_h,
          { "H-Flag", "icmpv6.opt.pvd_id.flags.h", FT_BOOLEAN, 16, NULL, 0x8000,
            "'HTTP' flag stating whether some PvD Additional Information is made available through HTTP over TLS", HFILL }},
        { &hf_icmpv6_opt_pvd_id_flags_l,
          { "L-Flag", "icmpv6.opt.pvd_id.flags.l", FT_BOOLEAN, 16, NULL, 0x4000,
            "'Legacy' flag stating whether the PvD is associated with IPv4 information assigned using DHCPv4", HFILL }},
        { &hf_icmpv6_opt_pvd_id_flags_r,
          { "R-Flag", "icmpv6.opt.pvd_id.flags.r", FT_BOOLEAN, 16, NULL, 0x2000,
            "'Router Advertisement' flag stating whether the PvD Option header is followed (right after padding to the next 64-bit boundary) by a Router Advertisement message header", HFILL }},
        { &hf_icmpv6_opt_pvd_id_flags_reserved,
          { "Reserved", "icmpv6.opt.pvd_id.flags.reserved", FT_UINT16, BASE_HEX, NULL, 0x1FF0,
            "Must be 0", HFILL }},
        { &hf_icmpv6_opt_pvd_id_delay,
          { "Delay", "icmpv6.opt.pvd_id.delay", FT_UINT16, BASE_DEC, NULL, 0x000F,
            "Unsigned integer used to delay HTTP GET queries from hosts by a randomized backoff", HFILL }},
        { &hf_icmpv6_opt_pvd_id_sequence_number,
          { "Sequence Number", "icmpv6.opt.pvd_id.sequence_number", FT_UINT16, BASE_DEC, NULL, 0x0,
            "Sequence number for the PvD Additional Information", HFILL }},
        { &hf_icmpv6_opt_pvd_id_fqdn,
          { "PvD ID FQDN", "icmpv6.opt.pvd_id.fqdn", FT_STRING, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},


        { &hf_icmpv6_opt_map_dist,
          { "Distance", "icmpv6.opt.map.distance", FT_UINT8, BASE_DEC, NULL, 0xF0,
            "Identifying the distance between MAP and the receiver of the advertisement (in the number of hops)", HFILL }},
        { &hf_icmpv6_opt_map_pref,
          { "Preference", "icmpv6.opt.map.preference", FT_UINT8, BASE_DEC, NULL, 0x0F,
            "Used as an indicator of operator preference (Highest is better)", HFILL }},
        { &hf_icmpv6_opt_map_flag,
          { "Flag", "icmpv6.opt.map.flag", FT_UINT8, BASE_HEX, NULL, 0x00,
            NULL, HFILL }},
        { &hf_icmpv6_opt_map_flag_r,
          { "RCoA Flag", "icmpv6.opt.map.flag.r", FT_BOOLEAN, 8, NULL, 0x80,
            "It indicates that the mobile node is allocated the RCoA by the MAP", HFILL }},
        { &hf_icmpv6_opt_map_flag_reserved,
          { "Reserved", "icmpv6.opt.map.flag.reserved", FT_UINT8, BASE_DEC, NULL, 0x7F,
            "Must be 0", HFILL }},
        { &hf_icmpv6_opt_map_valid_lifetime,
          { "Valid Lifetime", "icmpv6.opt.map.valid_lifetime", FT_UINT32, BASE_DEC, NULL, 0x0,
            "This value indicates the validity of the MAP's address and the RCoA.", HFILL }},
        { &hf_icmpv6_opt_map_global_address,
          { "Global Address", "icmpv6.opt.map.global_address", FT_IPv6, BASE_NONE, NULL, 0x0,
            "One of the MAP's global addresses", HFILL }},
        { &hf_icmpv6_opt_route_info_flag,
          { "Flag", "icmpv6.opt.route_info.flag", FT_UINT8, BASE_HEX, NULL, 0x00,
            NULL, HFILL }},
        { &hf_icmpv6_opt_route_info_flag_route_preference,
          { "Route Preference", "icmpv6.opt.route_info.flag.route_preference", FT_UINT8, BASE_DEC, VALS(nd_flag_router_pref), ND_RA_FLAG_RTPREF_MASK,
            "The Route Preference indicates whether to prefer the router associated with this prefix over others", HFILL }},
        { &hf_icmpv6_opt_route_info_flag_reserved,
          { "Reserved", "icmpv6.opt.route_info.flag.reserved", FT_UINT8, BASE_DEC, NULL, ND_RA_FLAG_RESERV_MASK,
            "Must be 0", HFILL }},
        { &hf_icmpv6_opt_route_lifetime,
          { "Route Lifetime", "icmpv6.opt.route_lifetime", FT_UINT32, BASE_DEC|BASE_SPECIAL_VALS, VALS(unique_infinity), 0x00,
            "The length of time in seconds that the prefix is valid for the purpose of route determination", HFILL }},
        { &hf_icmpv6_opt_name_type,
          { "Name Type", "icmpv6.opt.name_type", FT_UINT8, BASE_DEC, VALS(icmpv6_option_name_type_vals), 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_name_x501,
          { "DER Encoded X.501 Name", "icmpv6.opt.name_x501", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_name_fqdn,
          { "FQDN", "icmpv6.opt.name_type.fqdn", FT_STRING, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_cert_type,
          { "Cert Type", "icmpv6.opt.cert_type", FT_UINT8, BASE_DEC, VALS(icmpv6_option_cert_type_vals), 0x0,
            NULL, HFILL }},
        /* RFC3971:  SEcure Neighbor Discovery (SEND) */
        { &hf_icmpv6_send_identifier,
          { "Identifier", "icmpv6.send.identifier", FT_UINT16, BASE_DEC, NULL, 0x0,
            "An identifier to aid in matching with Request and Reply", HFILL }},
        { &hf_icmpv6_send_all_components,
          { "All Components", "icmpv6.send.all_components", FT_UINT16, BASE_DEC, NULL, 0x0,
            "Inform the receiver of the number of certificates in the entire path", HFILL }},
        { &hf_icmpv6_send_component,
          { "Component", "icmpv6.send.component", FT_UINT16, BASE_DEC, NULL, 0x0,
            "If the field is set to 65,535 if the sender seeks to retrieve all certificates", HFILL }},

        { &hf_icmpv6_x509if_Name,
          { "Name", "icmpv6.x509_Name", FT_UINT32, BASE_DEC, VALS(x509if_Name_vals), 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_x509af_Certificate,
          { "Certificate", "icmpv6.x509_Certificate", FT_NONE, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_redirected_packet,
          { "Redirected Packet", "icmpv6.opt.redirected_packet", FT_NONE, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_mtu,
          { "MTU", "icmpv6.opt.mtu", FT_UINT32, BASE_DEC, NULL, 0x0,
            "The recommended MTU for the link", HFILL }},
        { &hf_icmpv6_opt_nbma_shortcut_limit,
          { "Shortcut Limit", "icmpv6.opt.nbma.shortcut_limit", FT_UINT8, BASE_DEC, NULL, 0x0,
            "Hop limit for shortcut attempt", HFILL }},
        { &hf_icmpv6_opt_advertisement_interval,
          { "Advertisement Interval", "icmpv6.opt.advertisement_interval", FT_UINT32, BASE_DEC, NULL, 0x0,
            "The maximum time (in milliseconds) between successive unsolicited Router Advertisement messages sent by this router on this network interface", HFILL }},
        { &hf_icmpv6_opt_home_agent_preference,
          { "Home Agent Preference", "icmpv6.opt.home_agent_preference", FT_UINT16, BASE_DEC, NULL, 0x0,
            "The preference for the home agent sending this Router Advertisement", HFILL }},
        { &hf_icmpv6_opt_home_agent_lifetime,
          { "Home Agent Preference", "icmpv6.opt.home_agent_lifetime", FT_UINT16, BASE_DEC, NULL, 0x0,
            "The lifetime associated with the home agent in units of seconds.", HFILL }},
        { &hf_icmpv6_opt_ipv6_address,
          { "IPv6 Address", "icmpv6.opt.ipv6_address", FT_IPv6, BASE_NONE, NULL, 0x0,
            "IPv6 addresses of the interface", HFILL }},
        { &hf_icmpv6_opt_rdnss_lifetime,
          { "Lifetime", "icmpv6.opt.rdnss.lifetime", FT_UINT32, BASE_DEC|BASE_SPECIAL_VALS, VALS(rdnss_infinity), 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_rdnss,
          { "Recursive DNS Servers", "icmpv6.opt.rdnss", FT_IPv6, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_efo,
          { "Flags Expansion Option", "icmpv6.opt.efo", FT_UINT48, BASE_HEX, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_efo_rsv,
          { "Reserved", "icmpv6.opt.efo.rsv", FT_UINT48, BASE_HEX, NULL, FLAGS_EO_RSV,
            "Must be Zero", HFILL }},
        { &hf_icmpv6_opt_efo_pex,
          { "Private Experimentation", "icmpv6.opt.efo.pex", FT_UINT48, BASE_HEX, NULL, FLAGS_EO_PEX,
            NULL, HFILL }},
        { &hf_icmpv6_opt_hkr_pad_length,
          { "Pad Length", "icmpv6.opt.hkr.pad_length", FT_UINT8, BASE_DEC, NULL, 0x0,
            "The number of padding octets beyond the end of the Handover Key", HFILL }},
        { &hf_icmpv6_opt_hkr_at,
          { "AT", "icmpv6.opt.hkr.at", FT_UINT8, BASE_DEC, NULL, 0xF0,
            "The algorithm type field describing the algorithm used by FMIPv6 to calculate the authenticator", HFILL }},
        { &hf_icmpv6_opt_hkr_reserved,
          { "Reserved", "icmpv6.opt.hkr.reserved", FT_UINT8, BASE_DEC, NULL, 0x0F,
            "Reserved (Must be Zero)", HFILL }},
        { &hf_icmpv6_opt_hkr_encryption_public_key,
          { "Handover Key Encryption Public Key", "icmpv6.opt.hkr.encryption_public_key", FT_BYTES, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_hkr_padding,
          { "Padding", "icmpv6.opt.hkr.padding", FT_BYTES, BASE_NONE, NULL, 0x0,
            "A variable-length field making the option length a multiple of 8", HFILL }},
        { &hf_icmpv6_opt_hkr_lifetime,
          { "Padding", "icmpv6.opt.hkr.lifetime", FT_UINT16, BASE_DEC, NULL, 0x0,
            "Lifetime of the handover key (in seconds)", HFILL }},
        { &hf_icmpv6_opt_hkr_encrypted_handover_key,
          { "Encrypted Handover Key", "icmpv6.opt.hkr.encrypted_handover_key", FT_BYTES, BASE_NONE, NULL, 0x0,
            "The shared handover key, encrypted with the MN's handover key encryption public key", HFILL }},
        { &hf_icmpv6_opt_hai_option_code,
          { "Option-Code", "icmpv6.opt.hai.option_code", FT_UINT8, BASE_DEC, VALS(nd_opt_hai_option_code_val), 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_hai_length,
          { "HAI-Length", "icmpv6.opt.hai.length", FT_UINT8, BASE_DEC, NULL, 0x0,
            "The size of the HAI-Value field in octets", HFILL }},
        { &hf_icmpv6_opt_hai_value,
          { "HAI-Value", "icmpv6.opt.hai.value", FT_BYTES, BASE_NONE, NULL, 0x0,
            "The value specified by the Option-Code", HFILL }},
        { &hf_icmpv6_opt_mn_option_code,
          { "Option-Code", "icmpv6.opt.mn.option_code", FT_UINT8, BASE_DEC, VALS(nd_opt_mn_option_code_val), 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_mn_length,
          { "MN-Length", "icmpv6.opt.mn.length", FT_UINT8, BASE_DEC, NULL, 0x0,
            "The size of the MN-Value field in octets", HFILL }},
        { &hf_icmpv6_opt_mn_value,
          { "MN-Value", "icmpv6.opt.mn.value", FT_BYTES, BASE_NONE, NULL, 0x0,
            "The value specified by the Option-Code", HFILL }},
        { &hf_icmpv6_opt_dnssl_lifetime,
          { "Lifetime", "icmpv6.opt.dnssl.lifetime", FT_UINT32, BASE_DEC|BASE_SPECIAL_VALS, VALS(dnssl_infinity), 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_dnssl,
          { "Domain Names", "icmpv6.opt.dnssl", FT_STRING, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_aro_status,
          { "Status", "icmpv6.opt.aro.status", FT_UINT8, BASE_DEC, VALS(nd_opt_earo_status_val), 0x00,
            "Indicates the status of a registration in the NA response", HFILL }},
        { &hf_icmpv6_opt_earo_reserved,
          { "Reserved", "icmpv6.opt.earo.reserved", FT_UINT8, BASE_DEC, NULL, 0x00,
            NULL, HFILL }},
        { &hf_icmpv6_opt_earo_opaque,
          { "Opaque", "icmpv6.opt.earo.opaque", FT_UINT8, BASE_HEX, NULL, 0x00,
            "An opaque field whose content is dictated by flag I", HFILL }},
        { &hf_icmpv6_opt_earo_flag,
          { "Flags", "icmpv6.opt.earo.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_opt_earo_flag_reserved,
          { "Reserved", "icmpv6.opt.earo.flag.reserved", FT_BOOLEAN, 8, TFS(&tfs_set_notset), ND_OPT_EARO_FLAG_RESERVED,
            NULL, HFILL }},
        { &hf_icmpv6_opt_earo_flag_c,
          { "C", "icmpv6.opt.earo.flag.c", FT_BOOLEAN, 8, TFS(&tfs_set_notset), ND_OPT_EARO_FLAG_C,
            "Indicates that the ROVR field contains a Crypto-ID", HFILL }},
        { &hf_icmpv6_opt_earo_flag_p,
          { "P", "icmpv6.opt.earo.flag.p", FT_UINT8, BASE_DEC, VALS(nd_opt_earo_p_val), ND_OPT_EARO_FLAG_P,
            "Registered Address Type Indicator (RATInd)", HFILL }},
        { &hf_icmpv6_opt_earo_flag_i,
          { "I", "icmpv6.opt.earo.flag.i", FT_UINT8, BASE_DEC, VALS(nd_opt_earo_i_val), ND_OPT_EARO_FLAG_I,
            "Indicates the contents of the Opaque field", HFILL }},
        { &hf_icmpv6_opt_earo_flag_r,
          { "R", "icmpv6.opt.earo.flag.r", FT_BOOLEAN, 8, TFS(&tfs_set_notset), ND_OPT_EARO_FLAG_R,
            "Request reachability services for the Registered Address from a Routing Registrar", HFILL }},
        { &hf_icmpv6_opt_earo_flag_t,
          { "T", "icmpv6.opt.earo.flag.t", FT_BOOLEAN, 8, TFS(&tfs_set_notset), ND_OPT_EARO_FLAG_T,
            "When 0, the Transaction ID field must be ignored", HFILL }},
        { &hf_icmpv6_opt_earo_flag_f,
          { "F", "icmpv6.opt.earo.flag.f", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x80,
            NULL, HFILL }},
        { &hf_icmpv6_opt_earo_prefix_len,
          { "Prefix Length", "icmpv6.opt.earo.prefix_len", FT_UINT8, BASE_DEC, NULL, 0x00,
            NULL, HFILL }},
        { &hf_icmpv6_opt_earo_tid,
          { "TID (Transaction ID)", "icmpv6.opt.earo.tid", FT_UINT8, BASE_DEC, NULL, 0x00,
            "Unsigned integer maintained by the node and incremented with each registration.", HFILL }},
        { &hf_icmpv6_opt_earo_rovr,
          { "ROVR", "icmpv6.opt.earo.rovr", FT_BYTES, BASE_NONE, NULL, 0x00,
            "Registration Ownership Verifier (ROVR)", HFILL }},
        { &hf_icmpv6_opt_aro_registration_lifetime,
          { "Registration Lifetime", "icmpv6.opt.aro.registration_lifetime", FT_UINT16, BASE_DEC, NULL, 0x00,
            "The amount of time (in a unit of 60 seconds) that the router should retain the Neighbor Cache entry", HFILL }},
        { &hf_icmpv6_opt_aro_eui64,
          { "EUI-64", "icmpv6.opt.aro.eui64", FT_EUI64, BASE_NONE, NULL, 0x00,
            "This field is used to uniquely identify the interface of the registered address", HFILL }},
        { &hf_icmpv6_opt_6co_context_length,
          { "Context Length", "icmpv6.opt.6co.context_length", FT_UINT8, BASE_DEC, NULL, 0x00,
            "The number of leading bits in the Context Prefix field that are valid", HFILL }},
        { &hf_icmpv6_opt_6co_flag,
          { "Flag", "icmpv6.opt.6co.flag", FT_UINT8, BASE_HEX, NULL, 0x00,
            NULL, HFILL }},
        { &hf_icmpv6_opt_6co_flag_c,
          { "Compression Flag", "icmpv6.opt.6co.flag.c", FT_BOOLEAN, 8, TFS(&tfs_set_notset), ND_OPT_6CO_FLAG_C,
            "This flag indicates if the context is valid for use in compression", HFILL }},
        { &hf_icmpv6_opt_6co_flag_cid,
          { "CID", "icmpv6.opt.6co.flag.cid", FT_UINT8, BASE_DEC, NULL, ND_OPT_6CO_FLAG_CID,
            "Context Identifier for this prefix information", HFILL }},
        { &hf_icmpv6_opt_6co_flag_reserved,
          { "Reserved", "icmpv6.opt.6co.flag.reserved", FT_UINT8, BASE_DEC, NULL, ND_OPT_6CO_FLAG_RESERVED,
            "Must be zero", HFILL }},
        { &hf_icmpv6_opt_6co_valid_lifetime,
          { "Lifetime", "icmpv6.opt.6co.valid_lifetime", FT_UINT16, BASE_DEC, NULL, 0x00,
            "The length of time in a unit of 60 seconds that the context is valid for the purpose of header compression or decompression", HFILL }},
        { &hf_icmpv6_opt_6co_context_prefix,
          { "Context Prefix", "icmpv6.opt.6co.context_prefix", FT_IPv6, BASE_NONE, NULL, 0x00,
            "The IPv6 prefix or address corresponding to the Context ID (CID) field", HFILL }},
        { &hf_icmpv6_opt_abro_version_low,
          { "Version Low", "icmpv6.opt.abro.version_low", FT_UINT16, BASE_DEC, NULL, 0x00,
            "The version number low (the least significant 16 bits) corresponding to this set of information contained in the RA message", HFILL }},
        { &hf_icmpv6_opt_abro_version_high,
          { "Version", "icmpv6.opt.abro.version_high", FT_UINT16, BASE_DEC, NULL, 0x00,
            "The version number high (most significant 16 bits) corresponding to this set of information contained in the RA message", HFILL }},
        { &hf_icmpv6_opt_abro_valid_lifetime,
          { "Valid Lifetime", "icmpv6.opt.abro.valid_lifetime", FT_UINT16, BASE_DEC, NULL, 0x00,
            "The length of time in a unit of 60 seconds (relative to the time the packet is received) that this set of border router information is valid.", HFILL }},
        { &hf_icmpv6_opt_abro_6lbr_address,
          { "6LBR Address", "icmpv6.opt.abro.6lbr_address", FT_IPv6, BASE_NONE, NULL, 0x00,
            "IPv6 address of the 6LBR that is the origin of the included version number", HFILL }},
        { &hf_icmpv6_opt_6cio_flag,
          { "Capability Bits", "icmpv6.opt.6cio.flag", FT_UINT48, BASE_HEX, NULL, 0x00,
            NULL, HFILL }},
        { &hf_icmpv6_opt_6cio_flag_reserved,
          { "Reserved", "icmpv6.opt.6cio.flag.reserved", FT_BOOLEAN, 48, TFS(&tfs_set_notset), ND_OPT_6CIO_FLAG_RESERVED,
            NULL, HFILL }},
        { &hf_icmpv6_opt_6cio_flag_f,
          { "Prefix registration (F bit)", "icmpv6.opt.6cio.flag.f", FT_BOOLEAN, 48, TFS(&tfs_supported_not_supported), ND_OPT_6CIO_FLAG_F,
            "Registration for prefixes supported (RFC9926)", HFILL }},
        { &hf_icmpv6_opt_6cio_flag_g,
          { "GHC (G bit)", "icmpv6.opt.6cio.flag.g", FT_BOOLEAN, 48, TFS(&tfs_capable_not_capable), ND_OPT_6CIO_FLAG_G,
            "GHC capable (RFC7400)", HFILL }},
        { &hf_icmpv6_opt_6cio_flag_e,
          { "EARO (E bit)", "icmpv6.opt.6cio.flag.e", FT_BOOLEAN, 48, TFS(&tfs_supported_not_supported), ND_OPT_6CIO_FLAG_E,
            "EARO support (RFC8505)", HFILL }},
        { &hf_icmpv6_opt_6cio_flag_p,
          { "Routing Registrar (P bit)", "icmpv6.opt.6cio.flag.p", FT_BOOLEAN, 48, TFS(&tfs_set_notset), ND_OPT_6CIO_FLAG_P,
            "Routing Registrar (RFC8505)", HFILL }},
        { &hf_icmpv6_opt_6cio_flag_b,
          { "6LBR (B bit)", "icmpv6.opt.6cio.flag.b", FT_BOOLEAN, 48, TFS(&tfs_capable_not_capable), ND_OPT_6CIO_FLAG_B,
            "6LBR capable (RFC8505)", HFILL }},
        { &hf_icmpv6_opt_6cio_flag_l,
          { "6LR (L bit)", "icmpv6.opt.6cio.flag.l", FT_BOOLEAN, 48, TFS(&tfs_capable_not_capable), ND_OPT_6CIO_FLAG_L,
            "6LR capable (RFC8505)", HFILL }},
        { &hf_icmpv6_opt_6cio_flag_d,
          { "EDA (D bit)", "icmpv6.opt.6cio.flag.d", FT_BOOLEAN, 48, TFS(&tfs_supported_not_supported), ND_OPT_6CIO_FLAG_D,
            "EDA Support (RFC8505)", HFILL }},
        { &hf_icmpv6_opt_6cio_flag_a,
          { "AP-ND (A bit)", "icmpv6.opt.6cio.flag.a", FT_BOOLEAN, 48, TFS(&tfs_enabled_disabled), ND_OPT_6CIO_FLAG_A,
            "AP-ND Enabled (RFC8928)", HFILL }},
        { &hf_icmpv6_opt_6cio_flag_x,
          { "Address registration (X bit)", "icmpv6.opt.6cio.flag.x", FT_BOOLEAN, 48, TFS(&tfs_supported_not_supported), ND_OPT_6CIO_FLAG_X,
            "Registration for Unicast, Multicast, and Anycast Addresses Supported (RFC9685)", HFILL }},
        { &hf_icmpv6_opt_6cio_flag_experimental,
          { "Reserved", "icmpv6.opt.6cio.flag.experimental", FT_BOOLEAN, 48, TFS(&tfs_set_notset), ND_OPT_6CIO_FLAG_EXPERIMENTAL,
            NULL, HFILL }},

        { &hf_icmpv6_opt_captive_portal,
           { "Captive Portal", "icmpv6.opt.captive_portal", FT_STRING, BASE_NONE, NULL, 0x00,
             "The contact URI for the captive portal that the user should connect to", HFILL }},

        { &hf_icmpv6_opt_pref64_scaled_lifetime,
          { "Scaled Lifetime", "icmpv6.opt.pref64.scaled_lifetime", FT_UINT16, BASE_DEC, NULL, ND_OPT_PREF64_SL,
            "The maximum time in units of 8 seconds over which this NAT64 prefix MAY be used", HFILL }},
        { &hf_icmpv6_opt_pref64_plc,
          { "PLC (Prefix Length Code)", "icmpv6.opt.pref64.plc", FT_UINT16, BASE_HEX, VALS(pref64_plc_str), ND_OPT_PREF64_PLC,
            "This field encodes the NAT64 Prefix Length", HFILL }},
        { &hf_icmpv6_opt_pref64_prefix,
          { "Prefix", "icmpv6.opt.pref64.prefix", FT_IPv6, BASE_NONE, NULL, 0x00,
            "NAT64 Prefix", HFILL }},
        { &hf_icmpv6_opt_dnr_svcpriority,
          { "Service priority", "icmpv6.opt.dnr.svcpriority", FT_UINT16, BASE_DEC, NULL, 0x00,
            "DNR service priority", HFILL }},
        { &hf_icmpv6_opt_dnr_lifetime,
          { "Lifetime", "icmpv6.opt.dnr.lifetime", FT_UINT32, BASE_DEC|BASE_SPECIAL_VALS, VALS(unique_infinity), 0x00,
            "DNR lifetime in seconds", HFILL }},
        { &hf_icmpv6_opt_dnr_auth_domain_name_len,
          { "Authentication domain name length", "icmpv6.opt.dnr.adn_len", FT_UINT16, BASE_DEC, NULL, 0x00,
            "DNR authentication domain name length", HFILL }},
        { &hf_icmpv6_opt_dnr_auth_domain_name,
          { "Authentication domain name", "icmpv6.opt.dnr.adn", FT_STRING, BASE_NONE, NULL, 0x00,
            "DNR authentication domain name", HFILL }},
        { &hf_icmpv6_opt_dnr_addrs_len,
          { "Addresses length", "icmpv6.opt.dnr.addrs_len", FT_UINT16, BASE_DEC, NULL, 0x00,
            "DNR addresses length", HFILL }},
        { &hf_icmpv6_opt_dnr_addrs,
          { "Addresses", "icmpv6.opt.dnr.addrs", FT_NONE, BASE_NONE, NULL, 0x00,
            "DNR address", HFILL }},
        { &hf_icmpv6_opt_dnr_addrs_ip,
          { "Address", "icmpv6.opt.dnr.addrs.ip", FT_IPv6, BASE_NONE, NULL, 0x00,
            "DNR address", HFILL }},
        { &hf_icmpv6_opt_dnr_svc_params_len,
          { "SVC params length", "icmpv6.opt.dnr.svc_params_len", FT_UINT16, BASE_DEC, NULL, 0x00,
            "DNR SVC params length", HFILL }},
        { &hf_icmpv6_opt_dnr_padding,
          { "Padding", "icmpv6.opt.dnr.padding", FT_BYTES, BASE_NONE, NULL, 0x00,
            "DNR padding", HFILL }},

        /* RFC2710:  Multicast Listener Discovery for IPv6 */
        { &hf_icmpv6_mld_mrd,
          { "Maximum Response Delay [ms]", "icmpv6.mld.maximum_response_delay", FT_UINT16, BASE_DEC, NULL, 0x0,
            "Specifies the maximum allowed delay before sending a responding Report, in units of milliseconds", HFILL }},
        { &hf_icmpv6_mld_multicast_address,
          { "Multicast Address", "icmpv6.mld.multicast_address", FT_IPv6, BASE_NONE, NULL, 0x0,
            "Specific IPv6 multicast address", HFILL }},
        /* RFC 2894: Router Renumbering for IPv6 */
        { &hf_icmpv6_rr_sequencenumber,
           { "Sequence Number", "icmpv6.rr.sequence_number", FT_UINT32, BASE_DEC, NULL, 0x0,
             "The sequence number MUST be non-decreasing between Sequence Number Resets", HFILL }},
        { &hf_icmpv6_rr_segmentnumber,
           { "Segment Number", "icmpv6.rr.segment_number", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Enumerates different valid RR messages having the same Sequence Number", HFILL }},
        { &hf_icmpv6_rr_flag,
           { "Flags", "icmpv6.rr.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
             "Five are defined and three bits are reserved", HFILL }},
        { &hf_icmpv6_rr_flag_t,
           { "Test Command", "icmpv6.rr.flag.t", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RR_FLAG_T,
             "Indicates a Test message: processing is to be simulated and no configuration changes are to be made", HFILL }},
        { &hf_icmpv6_rr_flag_r,
           { "Result requested", "icmpv6.rr.flag.r", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RR_FLAG_R,
             "Indicates that the router send a Result message upon completion of processing the Command message", HFILL }},
        { &hf_icmpv6_rr_flag_a,
           { "All Interfaces", "icmpv6.rr.flag.a", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RR_FLAG_A,
             "Indicates that the Command be applied to all interfaces regardless of administrative shutdown status", HFILL }},
        { &hf_icmpv6_rr_flag_s,
           { "Site-specific", "icmpv6.rr.flag.s", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RR_FLAG_S,
             "Indicates that the Command be applied only to interfaces which belong to the same site as the interface to which the Command is addressed", HFILL }},
        { &hf_icmpv6_rr_flag_p,
           { "Processed previously", "icmpv6.rr.flag.p", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RR_FLAG_P,
             "Indicates that the Command message was previously processed (and is not a Test) and the responding router is not processing it again", HFILL }},
        { &hf_icmpv6_rr_flag_rsv,
           { "Reserved", "icmpv6.rr.flag.rsv", FT_UINT8, BASE_DEC, NULL, RR_FLAG_RSV,
             "Must be Zero", HFILL }},
        { &hf_icmpv6_rr_maxdelay,
           { "Max Delay", "icmpv6.rr.maxdelay", FT_UINT16, BASE_DEC, NULL, 0x0,
             "Specifying the maximum time (in milliseconds) by which a router MUST delay sending any reply to this Command", HFILL }},

        { &hf_icmpv6_rr_pco_mp_part,
           { "Match-Prefix Part", "icmpv6.rr.pco.mp", FT_NONE, BASE_NONE, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rr_pco_mp_opcode,
           { "OpCode", "icmpv6.rr.pco.mp.opcode", FT_UINT8, BASE_DEC, VALS(rr_pco_mp_opcode_val), 0x0,
             "Specifying the operation to be performed when the associated MatchPrefix matches an interface's prefix or address", HFILL }},
        { &hf_icmpv6_rr_pco_mp_oplength,
           { "OpLength", "icmpv6.rr.pco.mp.oplength", FT_UINT8, BASE_DEC, NULL, 0x0,
             "The total length of this Prefix Control Operation (in units of 8 octets)", HFILL }},
        { &hf_icmpv6_rr_pco_mp_ordinal,
           { "Ordinal", "icmpv6.rr.pco.mp.ordinal", FT_UINT8, BASE_HEX, NULL, 0x0,
             "The value is otherwise unconstrained", HFILL }},
        { &hf_icmpv6_rr_pco_mp_matchlen,
           { "MatchLen", "icmpv6.rr.pco.mp.matchlen", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Between 0 and 128 inclusive specifying the number of initial bits of MatchPrefix which are significant in matching", HFILL }},
        { &hf_icmpv6_rr_pco_mp_minlen,
           { "MinLen", "icmpv6.rr.pco.mp.minlen", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Specifying the minimum length which any configured prefix must have in order to be eligible for testing against the MatchPrefix", HFILL }},
        { &hf_icmpv6_rr_pco_mp_maxlen,
           { "MaxLen", "icmpv6.rr.pco.mp.maxlen", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Specifying the maximum length which any configured prefix must have in order to be eligible for testing against the MatchPrefix", HFILL }},
        { &hf_icmpv6_rr_pco_mp_matchprefix,
           { "MatchPrefix", "icmpv6.rr.pco.mp.matchprefix", FT_IPv6, BASE_NONE, NULL, 0x0,
             "The 128-bit prefix to be compared with each interface's prefix or address", HFILL }},
        { &hf_icmpv6_rr_pco_up_part,
           { "Use-Prefix Part", "icmpv6.rr.pco.up", FT_NONE, BASE_NONE, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rr_pco_up_uselen,
           { "UseLen", "icmpv6.rr.pco.up.uselen", FT_UINT8, BASE_DEC, NULL, 0x0,
             "specifying the number of initial bits of UsePrefix to use in creating a new prefix for an interface", HFILL }},
        { &hf_icmpv6_rr_pco_up_keeplen,
           { "KeepLen", "icmpv6.rr.pco.up.keeplen", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Specifying the number of bits of the prefix or address which matched the associated Match-Prefix which should be retained in the new prefix", HFILL }},
        { &hf_icmpv6_rr_pco_up_flagmask,
           { "FlagMask", "icmpv6.rr.pco.up.flagmask", FT_UINT8, BASE_HEX, NULL, 0x0,
             "A 1 bit in any position means that the corresponding flag bit in a Router Advertisement (RA) Prefix Information Option for the New Prefix should be set from the RAFlags field in this Use-Prefix Part", HFILL }},

        { &hf_icmpv6_rr_pco_up_flagmask_l,
          { "On-link flag(L)", "icmpv6.rr.pco.up.flagmask.l", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x80,
            "When set, indicates the On-link (L) flag bit in a Router Advertisement (RA) Prefix Information Option for the New Prefix should be set from the RAFlags field in this Use-Prefix Part", HFILL }},
        { &hf_icmpv6_rr_pco_up_flagmask_a,
          { "Autonomous address-configuration flag(A)", "icmpv6.rr.pco.up.flagmask.a", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x40,
            "When set, indicates the Autonomous address-configuration (A) flag bit in a Router Advertisement (RA) Prefix Information Option for the New Prefix should be set from the RAFlags field in this Use-Prefix Part", HFILL }},
        { &hf_icmpv6_rr_pco_up_flagmask_reserved,
          { "Reserved", "icmpv6.rr.pco.up.flagmask.reserved", FT_UINT8, BASE_DEC, NULL, 0x3f,
            NULL, HFILL }},
        { &hf_icmpv6_rr_pco_up_raflags,
           { "RAFlags", "icmpv6.rr.pco.up.raflags", FT_UINT8, BASE_HEX, NULL, 0x0,
             "Under control of the FlagMask field, may be used to initialize the flags in Router Advertisement Prefix Information Options  which advertise the New Prefix", HFILL }},
        { &hf_icmpv6_rr_pco_up_raflags_l,
          { "On-link flag(L)", "icmpv6.rr.pco.up.flagmask.l", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x80,
            "When set, indicates that this prefix can be used for on-link determination", HFILL }},
        { &hf_icmpv6_rr_pco_up_raflags_a,
          { "Autonomous address-configuration flag(A)", "icmpv6.rr.pco.up.flagmask.a", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x40,
            "When set indicates that this prefix can be used for stateless address configuration", HFILL }},
        { &hf_icmpv6_rr_pco_up_raflags_reserved,
          { "Reserved", "icmpv6.rr.pco.up.flagmask.reserved", FT_UINT8, BASE_DEC, NULL, 0x3f,
            NULL, HFILL }},
        { &hf_icmpv6_rr_pco_up_validlifetime,
           { "Valid Lifetime", "icmpv6.rr.pco.up.validlifetime", FT_UINT32, BASE_DEC|BASE_SPECIAL_VALS, VALS(unique_infinity), 0x0,
             "The number of seconds for which the New Prefix will be valid", HFILL }},
        { &hf_icmpv6_rr_pco_up_preferredlifetime,
           { "Preferred Lifetime", "icmpv6.rr.pco.up.preferredlifetime", FT_UINT32, BASE_DEC|BASE_SPECIAL_VALS, VALS(unique_infinity), 0x0,
             "The number of seconds for which the New Prefix will be preferred", HFILL }},
        { &hf_icmpv6_rr_pco_up_flag,
           { "Flags", "icmpv6.rr.pco.up.flag", FT_UINT32, BASE_HEX, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rr_pco_up_flag_v,
          { "Decrement valid lifetime", "icmpv6.rr.pco.up.flag.v", FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x80000000,
            "When set, indicating that the valid lifetime of the New Prefix MUST be effectively decremented in real time", HFILL }},
        { &hf_icmpv6_rr_pco_up_flag_p,
          { "Decrement preferred lifetime", "icmpv6.rr.pco.up.flag.p", FT_BOOLEAN, 32, TFS(&tfs_set_notset), 0x40000000,
            "When set, indicating that the preferred lifetime of the New Prefix MUST be effectively decremented in real time", HFILL }},
        { &hf_icmpv6_rr_pco_up_flag_reserved,
          { "Reserved", "icmpv6.rr.pco.up.flag.reserved", FT_UINT32, BASE_DEC, NULL, 0x3FFFFFFF,
            NULL, HFILL }},
        { &hf_icmpv6_rr_pco_up_useprefix,
           { "UsePrefix", "icmpv6.rr.pco.up.useprefix", FT_IPv6, BASE_NONE, NULL, 0x0,
             "The 128-bit Use-prefix which either becomes or is used in forming (if KeepLen is nonzero) the New Prefix", HFILL }},
        { &hf_icmpv6_rr_rm,
           { "Result Message", "icmpv6.rr.rm", FT_NONE, BASE_NONE, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rr_rm_flag,
           { "Flags", "icmpv6.rr.rm.flag", FT_UINT16, BASE_HEX, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rr_rm_flag_b,
          { "Bounds", "icmpv6.rr.rm.flag.b", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0002,
            "When set, indicates that one or more fields in the associated PCO were out of bounds", HFILL }},
        { &hf_icmpv6_rr_rm_flag_f,
          { "Forbidden", "icmpv6.rr.rm.flag.f", FT_BOOLEAN, 16, TFS(&tfs_set_notset), 0x0001,
            "When set, indicates that one or more Use-Prefix parts from the associated PCO were not honored by the router because of attempted formation of a forbidden prefix format, such as a multicast or loopback address", HFILL }},
        { &hf_icmpv6_rr_rm_flag_reserved,
          { "Reserved", "icmpv6.rr.rm.flag.reserved", FT_UINT16, BASE_DEC, NULL, 0xFFFC,
            "Must be Zero", HFILL }},
        { &hf_icmpv6_rr_rm_ordinal,
           { "Ordinal", "icmpv6.rr.rm.ordinal", FT_UINT8, BASE_HEX, NULL, 0x0,
             "The value is otherwise unconstrained", HFILL }},
        { &hf_icmpv6_rr_rm_matchedlen,
           { "MatchedLen", "icmpv6.rr.rm.matchedlen", FT_UINT8, BASE_DEC, NULL, 0x0,
             "The length of the Matched Prefix", HFILL }},
        { &hf_icmpv6_rr_rm_interfaceindex,
           { "InterfaceIndex", "icmpv6.rr.rm.interfaceindex", FT_UINT32, BASE_DEC, NULL, 0x0,
             "The router's numeric designation of the interface on which the MatchedPrefix was configured", HFILL }},
        { &hf_icmpv6_rr_rm_matchedprefix,
           { "MatchedPrefix", "icmpv6.rr.rm.matchedprefix", FT_IPv6, BASE_NONE, NULL, 0x0,
             "The 128 Bits MatchedPrefix", HFILL }},

        /* RFC3775/6275: Mobility Support in IPv6 */
        { &hf_icmpv6_mip6_identifier,
          { "Identifier", "icmpv6.mip6.identifier", FT_UINT16, BASE_DEC_HEX, NULL, 0x0,
            "An identifier to aid in matching with Request and Reply", HFILL }},
        { &hf_icmpv6_mip6_home_agent_address,
          { "Home Agent Address", "icmpv6.mip6.home_agent_address", FT_IPv6, BASE_NONE, NULL, 0x0,
            "A list of addresses of home agents on the home link for the mobile node", HFILL }},
        { &hf_icmpv6_mip6_flag,
          { "Flags", "icmpv6.mip6.flag", FT_UINT16, BASE_HEX, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_mip6_flag_m,
          { "Managed address configuration", "icmpv6.mip6.flag.m", FT_BOOLEAN, 16, TFS(&tfs_set_notset), FLAGS_MIP6_M,
            "When set, it indicates that addresses are available via DHCPv6", HFILL }},
        { &hf_icmpv6_mip6_flag_o,
          { "Other configuration", "icmpv6.mip6.flag.o", FT_BOOLEAN, 16, TFS(&tfs_set_notset), FLAGS_MIP6_O,
            "When set, it indicates that other configuration information is available via DHCPv6", HFILL }},
        { &hf_icmpv6_mip6_flag_rsv,
          { "Reserved", "icmpv6.mip6.flag.rsv", FT_UINT16, BASE_DEC, NULL, FLAGS_MIP6_RSV,
            "Must be Zero", HFILL }},

        /* RFC3810: Multicast Listener Discovery Version 2 (MLDv2) for IPv6 */
        { &hf_icmpv6_mld_mrc,
          { "Maximum Response Code", "icmpv6.mld.maximum_response_code", FT_UINT16, BASE_DEC, NULL, 0x0,
            "Specifies the maximum allowed delay before sending a responding Report", HFILL }},
       { &hf_icmpv6_mld_flag,
          { "Flags", "icmpv6.mld.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
            NULL, HFILL }},
       { &hf_icmpv6_mld_flag_s,
          { "Suppress Router-Side Processing", "icmpv6.mld.flag.s", FT_BOOLEAN, 8, NULL, MLD_FLAG_S,
            "Indicates to any receiving multicast routers that they have to suppress the normal timer updates they perform upon hearing a Query", HFILL }},
       { &hf_icmpv6_mld_flag_qrv,
          { "QRV (Querier's Robustness Variable)", "icmpv6.mld.flag.qrv", FT_UINT8, BASE_DEC, NULL, MLD_FLAG_QRV,
            "Contains the RV (Robustness Variable) value used by the Querier", HFILL }},
       { &hf_icmpv6_mld_flag_rsv,
          { "Reserved", "icmpv6.mld.flag.reserved", FT_UINT8, BASE_DEC, NULL, MLD_FLAG_RSV,
            "Must Be Zero", HFILL }},
       { &hf_icmpv6_mld_qqi,
          { "QQIC (Querier's Query Interval Code)", "icmpv6.mld.qqi", FT_UINT8, BASE_DEC, NULL, 0x0,
            "Specifies the QI (Query Interval) used by the Querier", HFILL }},
       { &hf_icmpv6_mld_nb_sources,
          { "Number of Sources", "icmpv6.mld.nb_sources", FT_UINT16, BASE_DEC, NULL, 0x0,
            "Specifies how many source addresses are present in the Query", HFILL }},
       { &hf_icmpv6_mld_source_address,
          { "Source Address", "icmpv6.mld.source_address", FT_IPv6, BASE_NONE, NULL, 0x0,
            "The Source Address fields are a vector of unicast addresses", HFILL }},
        { &hf_icmpv6_mldr_nb_mcast_records,
          { "Number of Multicast Address Records", "icmpv6.mldr.nb_mcast_records", FT_UINT16, BASE_DEC, NULL, 0x0,
            "Specifies how many Multicast Address Records are present in this Report", HFILL }},
        { &hf_icmpv6_mldr_mar,
          { "Multicast Address Record", "icmpv6.mldr.mar", FT_NONE, BASE_NONE, NULL, 0x0,
            "Each Multicast Address Record is a block of fields that contain information on the sender listening to a single multicast address on the interface from which the Report is sent", HFILL }},
        { &hf_icmpv6_mldr_mar_record_type,
          { "Record Type", "icmpv6.mldr.mar.record_type", FT_UINT8, BASE_DEC, VALS(mldr_record_type_val), 0x0,
            "It specifies the type of the Multicast Address Record", HFILL }},
        { &hf_icmpv6_mldr_mar_aux_data_len,
          { "Aux Data Len", "icmpv6.mldr.mar.aux_data_len", FT_UINT8, BASE_DEC, NULL, 0x0,
            "The Aux Data Len field contains the length (in units of 32-bit words) of the Auxiliary Data Field in this Multicast Address Record", HFILL }},
        { &hf_icmpv6_mldr_mar_nb_sources,
          { "Number of Sources", "icmpv6.mldr.mar.nb_sources", FT_UINT16, BASE_DEC, NULL, 0x0,
            "The Number of Sources field specifies how many source addresses are present in this Multicast Address Record", HFILL }},
        { &hf_icmpv6_mldr_mar_multicast_address,
          { "Multicast Address", "icmpv6.mldr.mar.multicast_address", FT_IPv6, BASE_NONE, NULL, 0x0,
            "The Multicast Address field contains the multicast address to which this Multicast Address Record pertains", HFILL }},
        { &hf_icmpv6_mldr_mar_source_address,
          { "Source Address", "icmpv6.mldr.mar.source_address", FT_IPv6, BASE_NONE, NULL, 0x0,
            "The Source Address fields are a vector of unicast addresses", HFILL }},
        { &hf_icmpv6_mldr_mar_auxiliary_data,
          { "Auxiliary Data", "icmpv6.mldr.mar.auxiliary_data", FT_BYTES, BASE_NONE, NULL, 0x0,
            "Contains additional information that pertain to this Multicast Address Record", HFILL }},
        /* RFC 4068/5268/5568: Fast Handovers for Mobile IPv6 ( Mobile IPv6 Fast Handovers ) */
        { &hf_icmpv6_fmip6_subtype,
           { "Subtype", "icmpv6.fmip6.subtype", FT_UINT8, BASE_DEC, VALS(fmip6_subtype_val), 0x0,
             "Designates the Subtype of information", HFILL }},
        { &hf_icmpv6_fmip6_hi_flag,
          { "Flag", "icmpv6.fmip6.hi.flag", FT_UINT8, BASE_HEX, NULL, 0x00,
            NULL, HFILL }},
        { &hf_icmpv6_fmip6_hi_flag_s,
          { "Assigned address configuration", "icmpv6.fmip6.hi.flag.s", FT_BOOLEAN, 8, TFS(&tfs_set_notset), FMIP6_HI_FLAG_S,
            "When set, this message requests a new CoA to be returned by the destination", HFILL }},
        { &hf_icmpv6_fmip6_hi_flag_u,
          { "Buffer", "icmpv6.fmip6.hi.flag.a", FT_BOOLEAN, 8, TFS(&tfs_set_notset), FMIP6_HI_FLAG_U,
            "When set, the destination SHOULD buffer any packets toward the node indicated in the options of this message", HFILL }},
        { &hf_icmpv6_fmip6_hi_flag_reserved,
          { "Reserved", "icmpv6.fmip6.hi.flag.reserved", FT_UINT8, BASE_DEC, NULL, FMIP6_HI_FLAG_RSV,
            NULL, HFILL }},
        { &hf_icmpv6_fmip6_identifier,
          { "Identifier", "icmpv6.fmip6.identifier", FT_UINT16, BASE_DEC_HEX, NULL, 0x0,
            "An identifier to aid in matching with Request and Reply", HFILL }},

        /* RFC 4286: Multicast Router Discovery */
        { &hf_icmpv6_mcast_ra_query_interval,
          { "Query Interval", "icmpv6.mcast_ra.query_interval", FT_UINT16, BASE_DEC, NULL, 0x0,
            "The Query Interval value (in seconds) in use by MLD on the interface.", HFILL }},
        { &hf_icmpv6_mcast_ra_robustness_variable,
          { "Robustness Variable", "icmpv6.mcast_ra.robustness_variable", FT_UINT16, BASE_DEC, NULL, 0x0,
            "The Robustness Variable in use by MLD on the advertising interface", HFILL }},

        /* RFC 4620: IPv6 Node Information Queries */
        { &hf_icmpv6_ni_qtype,
           { "Qtype", "icmpv6.ni.qtype", FT_UINT16, BASE_DEC, VALS(ni_qtype_val), 0x0,
             "Designates the type of information", HFILL }},
        { &hf_icmpv6_ni_flag,
           { "Flags", "icmpv6.ni.flag", FT_UINT16, BASE_HEX, NULL, 0x0,
             "Qtype-specific flags that may be defined for certain Query types and their Replies", HFILL }},
        { &hf_icmpv6_ni_flag_g,
           { "Global-scope addresses", "icmpv6.ni.flag.g", FT_BOOLEAN, 16, TFS(&tfs_set_notset), NI_FLAG_G,
             "Global-scope addresses are requested", HFILL }},
        { &hf_icmpv6_ni_flag_s,
           { "Site-local addresses", "icmpv6.ni.flag.s", FT_BOOLEAN, 16, TFS(&tfs_set_notset), NI_FLAG_S,
             "Site-local addresses are requested", HFILL }},
        { &hf_icmpv6_ni_flag_l,
           { "Link-local addresses", "icmpv6.ni.flag.l", FT_BOOLEAN, 16, TFS(&tfs_set_notset), NI_FLAG_L,
             "Link-local addresses are requested", HFILL }},
        { &hf_icmpv6_ni_flag_c,
           { "Compression", "icmpv6.ni.flag.c", FT_BOOLEAN, 16, TFS(&tfs_set_notset), NI_FLAG_C,
             "IPv4-compatible (now deprecated) and IPv4-mapped addresses are requested", HFILL }},
        { &hf_icmpv6_ni_flag_a,
           { "Unicast Addresses", "icmpv6.ni.flag.a", FT_BOOLEAN, 16, TFS(&tfs_ni_flag_a), NI_FLAG_A,
             "Responder's unicast addresses", HFILL }},
        { &hf_icmpv6_ni_flag_t,
           { "Truncated", "icmpv6.ni.flag.t", FT_BOOLEAN, 16, TFS(&tfs_set_notset), NI_FLAG_T,
             "Defined in a Reply only, indicates that the set of addresses is incomplete for space reasons", HFILL }},
        { &hf_icmpv6_ni_flag_rsv,
           { "Reserved", "icmpv6.ni.flag.rsv", FT_UINT16, BASE_HEX, NULL, NI_FLAG_RSV,
             "Must be Zero", HFILL }},
        { &hf_icmpv6_ni_nonce,
           { "Nonce", "icmpv6.ni.nonce", FT_UINT64, BASE_HEX, NULL, 0x0,
             "An opaque 64-bit field", HFILL }},
        { &hf_icmpv6_ni_query_subject_ipv6,
           { "IPv6 subject address", "icmpv6.ni.query.subject_ipv6", FT_IPv6, BASE_NONE, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_ni_query_subject_fqdn,
           { "FQDN subject", "icmpv6.ni.query.subject_fqdn", FT_STRING, BASE_NONE, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_ni_query_subject_ipv4,
           { "IPv4 subject address", "icmpv6.ni.query.subject_ipv4", FT_IPv4, BASE_NONE, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_ni_reply_node_ttl,
           { "TTL", "icmpv6.ni.reply.node_ttl", FT_UINT32, BASE_DEC, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_ni_reply_node_name,
           { "Name Node", "icmpv6.ni.reply.node_name", FT_STRING, BASE_NONE, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_ni_reply_node_address,
           { "IPv6 Node address", "icmpv6.ni.reply.node_address", FT_IPv6, BASE_NONE, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_ni_reply_ipv4_address,
           { "IPv4 Node address", "icmpv6.ni.reply.ipv4_address", FT_IPv4, BASE_NONE, NULL, 0x0,
             NULL, HFILL }},

        /* RFC 4884: Extended ICMP */
        { &hf_icmpv6_length,
          { "Length of original datagram", "icmpv6.length", FT_UINT8, BASE_DEC, NULL, 0x0,
            "The length of the original datagram", HFILL }},

        /* RPL: RFC 6550 : Routing over Low-Power and Lossy Networks. */
        { &hf_icmpv6_rpl_dis_flag,
           { "Flags", "icmpv6.rpl.dis.flags", FT_UINT8, BASE_DEC, NULL, 0x0,
             "8-bit unused field reserved for flags", HFILL }},
        { &hf_icmpv6_rpl_dio_instance,
           { "RPLInstanceID", "icmpv6.rpl.dio.instance", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Set by the DODAG root that indicates which RPL Instance the DODAG is part of", HFILL }},
        { &hf_icmpv6_rpl_dio_version,
           { "Version", "icmpv6.rpl.dio.version", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Set by the DODAG root to the DODAGVersionNumber", HFILL }},
        { &hf_icmpv6_rpl_dio_rank,
           { "Rank", "icmpv6.rpl.dio.rank", FT_UINT16, BASE_DEC, NULL, 0x0,
             "Indicating the DODAG rank of the node sending the DIO message", HFILL }},
        { &hf_icmpv6_rpl_dio_flag,
           { "Flags", "icmpv6.rpl.dio.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rpl_dio_flag_g,
           { "Grounded (G)", "icmpv6.rpl.dio.flag.g", FT_BOOLEAN, 8, NULL, RPL_DIO_FLAG_G,
             "Indicates whether the DODAG advertised can satisfy the application-defined goal", HFILL }},
        { &hf_icmpv6_rpl_dio_flag_0,
           { "Zero", "icmpv6.rpl.dio.flag.0", FT_BOOLEAN, 8, NULL, RPL_DIO_FLAG_0,
             NULL, HFILL }},
        { &hf_icmpv6_rpl_dio_flag_mop,
           { "Mode of Operation (MOP)", "icmpv6.rpl.dio.flag.mop", FT_UINT8, BASE_HEX, VALS(rpl_dio_map_val), RPL_DIO_FLAG_MOP,
             "Identifies the mode of operation of the RPL Instance as administratively provisioned at and distributed by the DODAG Root", HFILL }},
        { &hf_icmpv6_rpl_dio_flag_prf,
           { "DODAG Preference", "icmpv6.rpl.dio.flag.preference", FT_UINT8, BASE_DEC, NULL, RPL_DIO_FLAG_PRF,
             "Defines how preferable the root of this DODAG is compared to other DODAG roots within the instance", HFILL }},
        { &hf_icmpv6_rpl_dio_dtsn,
           { "Destination Advertisement Trigger Sequence Number (DTSN)", "icmpv6.rpl.dio.dtsn", FT_UINT8, BASE_DEC, NULL, 0x0,
             "The DTSN is used as part of the procedure to maintain downward routes.", HFILL }},
        { &hf_icmpv6_rpl_dio_dagid,
           { "DODAGID", "icmpv6.rpl.dio.dagid", FT_IPv6, BASE_NONE, NULL, 0x0,
             "IPv6 address set by a DODAG root which uniquely identifies a DODAG", HFILL }},
        { &hf_icmpv6_rpl_dao_instance,
           { "RPLInstanceID", "icmpv6.rpl.dao.instance", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Indicating the topology instance associated with the DODAG as learned from the DIO", HFILL }},
        { &hf_icmpv6_rpl_dao_flag,
           { "Flags", "icmpv6.rpl.dao.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rpl_dao_flag_k,
           { "DAO-ACK Request (K)", "icmpv6.rpl.dao.flag.k", FT_BOOLEAN, 8, NULL, RPL_DAO_FLAG_K,
             "Indicates that the recipient is expected to send a DAO-ACK back", HFILL }},
        { &hf_icmpv6_rpl_dao_flag_d,
           { "DODAGID Present (D)", "icmpv6.rpl.dao.flag.d", FT_BOOLEAN, 8, NULL, RPL_DAO_FLAG_D,
             "Indicates that the DODAGID field is present", HFILL }},
        { &hf_icmpv6_rpl_dao_flag_rsv,
           { "Reserved", "icmpv6.rpl.dao.flag.rsv", FT_UINT8, BASE_DEC, NULL, RPL_DAO_FLAG_RESERVED,
             "Must be zero", HFILL }},
        { &hf_icmpv6_rpl_dao_sequence,
           { "DAO Sequence", "icmpv6.rpl.dao.sequence", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Incremented at each unique DAO message from a node and echoed in the DAO-ACK message", HFILL }},
        { &hf_icmpv6_rpl_dao_dodagid,
           { "DODAGID", "icmpv6.rpl.dao.dodagid", FT_IPv6, BASE_NONE, NULL, 0x0,
             "IPv6 address set by a DODAG root which uniquely identifies a DODAG", HFILL }},
        { &hf_icmpv6_rpl_daoack_instance,
           { "RPLInstanceID", "icmpv6.rpl.daoack.instance", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Indicating the topology instance associated with the DODAG, as learned from the DIO", HFILL }},
        { &hf_icmpv6_rpl_daoack_flag,
           { "Flag", "icmpv6.rpl.daoack.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rpl_daoack_flag_d,
           { "DODAGID Present (D)", "icmpv6.rpl.daoack.flag.d", FT_BOOLEAN, 8, NULL, RPL_DAOACK_FLAG_D,
             "Indicates that the DODAGID field is present", HFILL }},
        { &hf_icmpv6_rpl_daoack_flag_rsv,
           { "Reserved", "icmpv6.rpl.daoack.flag.rsv", FT_UINT8, BASE_DEC, NULL, RPL_DAOACK_FLAG_RESERVED,
             "Must be zero", HFILL }},
        { &hf_icmpv6_rpl_daoack_sequence,
           { "DAO-ACK Sequence", "icmpv6.rpl.daoack.sequence", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Incremented at each DAO message from a node, and echoed in the DAO-ACK by the recipient", HFILL }},
        { &hf_icmpv6_rpl_daoack_status,
           { "Status", "icmpv6.rpl.daoack.status", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Indicates the completion", HFILL }},
        { &hf_icmpv6_rpl_daoack_dodagid,
           { "DODAGID", "icmpv6.rpl.daoack.dodagid", FT_IPv6, BASE_NONE, NULL, 0x0,
             "IPv6 address integer set by a DODAG root which uniquely identifies a DODAG", HFILL }},
        { &hf_icmpv6_rpl_dco_instance,
           { "RPLInstanceID", "icmpv6.rpl.dco.instance", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Indicating the topology instance associated with the DODAG as learned from the DIO", HFILL }},
        { &hf_icmpv6_rpl_dco_flags,
           { "Flags", "icmpv6.rpl.dco.flags", FT_UINT8, BASE_HEX, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rpl_dco_flag_k,
           { "DCO-ACK Request (K)", "icmpv6.rpl.dco.flag.k", FT_BOOLEAN, 8, NULL, RPL_DCO_FLAG_K,
             "Indicates that the recipient is expected to send a DCO-ACK back", HFILL }},
        { &hf_icmpv6_rpl_dco_flag_d,
           { "DODAGID Present (D)", "icmpv6.rpl.dco.flag.d", FT_BOOLEAN, 8, NULL, RPL_DCO_FLAG_D,
             "Indicates that the DODAGID field is present", HFILL }},
        { &hf_icmpv6_rpl_dco_flag_rsv,
           { "Reserved", "icmpv6.rpl.dco.flag.rsv", FT_UINT8, BASE_DEC, NULL, RPL_DCO_FLAG_RESERVED,
             "Must be zero", HFILL }},
        {&hf_icmpv6_rpl_dco_status,
           {"RPL Status", "icmpv6.rpl.dco.status", FT_UINT8, BASE_DEC, NULL, 0x0,
            "Set by the root common parent that generates the DCO, propagated unchanged", HFILL }},
        { &hf_icmpv6_rpl_dco_sequence,
           { "DCO Sequence", "icmpv6.rpl.dco.sequence", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Incremented at each unique DCO message from a node and echoed in the DCO-ACK message", HFILL }},
        { &hf_icmpv6_rpl_dco_dodagid,
           { "DODAGID", "icmpv6.rpl.dco.dodagid", FT_IPv6, BASE_NONE, NULL, 0x0,
             "IPv6 address set by a DODAG root which uniquely identifies a DODAG", HFILL }},
        { &hf_icmpv6_rpl_dcoack_instance,
           { "RPLInstanceID", "icmpv6.rpl.dcoack.instance", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Indicating the topology instance associated with the DODAG, as learned from the DIO", HFILL }},
        { &hf_icmpv6_rpl_dcoack_flag,
           { "Flag", "icmpv6.rpl.dcoack.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rpl_dcoack_flag_d,
           { "DODAGID Present (D)", "icmpv6.rpl.dcoack.flag.d", FT_BOOLEAN, 8, NULL, RPL_DCOACK_FLAG_D,
             "Indicates that the DODAGID field is present", HFILL }},
        { &hf_icmpv6_rpl_dcoack_flag_rsv,
           { "Reserved", "icmpv6.rpl.dcoack.flag.rsv", FT_UINT8, BASE_DEC, NULL, RPL_DCOACK_FLAG_RESERVED,
             "Must be zero", HFILL }},
        { &hf_icmpv6_rpl_dcoack_sequence,
           { "DCO-ACK Sequence", "icmpv6.rpl.dcoack.sequence", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Incremented at each DCO message from a node, and echoed in the DCO-ACK by the recipient", HFILL }},
        { &hf_icmpv6_rpl_dcoack_status,
           { "Status", "icmpv6.rpl.dcoack.status", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Indicates the completion", HFILL }},
        { &hf_icmpv6_rpl_dcoack_dodagid,
           { "DODAGID", "icmpv6.rpl.dcoack.dodagid", FT_IPv6, BASE_NONE, NULL, 0x0,
             "IPv6 address integer set by a DODAG root which uniquely identifies a DODAG", HFILL }},
        { &hf_icmpv6_rpl_cc_instance,
           { "RPLInstanceID", "icmpv6.rpl.cc.instance", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Indicating the topology instance associated with the DODAG, as learned from the DIO", HFILL }},
        { &hf_icmpv6_rpl_cc_flag,
           { "Flag", "icmpv6.rpl.cc.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rpl_cc_flag_r,
           { "Response (R)", "icmpv6.rpl.cc.flag.r", FT_BOOLEAN, 8, NULL, RPL_CC_FLAG_R,
             "Indicates whether the CC message is a response", HFILL }},
        { &hf_icmpv6_rpl_cc_flag_rsv,
           { "Reserved", "icmpv6.rpl.cc.flag.rsv", FT_UINT8, BASE_DEC, NULL, RPL_CC_FLAG_RESERVED,
             "Must be zero", HFILL }},
        { &hf_icmpv6_rpl_cc_nonce,
           { "CC Nonce", "icmpv6.rpl.cc.nonce", FT_UINT16, BASE_HEX, NULL, 0x0,
             "The corresponding CC response includes the same CC nonce value as the request, as learned from the DIO", HFILL }},
        { &hf_icmpv6_rpl_cc_dodagid,
           { "DODAGID", "icmpv6.rpl.cc.dodagid", FT_IPv6, BASE_NONE, NULL, 0x0,
             "IPv6 address integer set by a DODAG root which uniquely identifies a DODAG", HFILL }},
        { &hf_icmpv6_rpl_cc_destination_counter,
           { "Destination Counter", "icmpv6.rpl.cc.destination_counter", FT_UINT32, BASE_DEC, NULL, 0x0,
             "Indicating the sender's estimate of the destination's current security Counter value", HFILL }},
        { &hf_icmpv6_rpl_secure_flag,
           { "Flags", "icmpv6.rpl.secure.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rpl_secure_flag_t,
           { "Counter is Time (T)", "icmpv6.rpl.secure.flag.t", FT_BOOLEAN, 8, NULL, RPL_SECURE_FLAG_T,
             "If it is set then the Counter field is a timestamp", HFILL }},
        { &hf_icmpv6_rpl_secure_flag_rsv,
           { "Reserved", "icmpv6.rpl.secure.flag.rsv", FT_UINT8, BASE_DEC, NULL, RPL_SECURE_FLAG_RSV,
             "Must be zero", HFILL }},
        { &hf_icmpv6_rpl_secure_algorithm,
           { "Algorithm", "icmpv6.rpl.secure.algorithm", FT_UINT8, BASE_DEC, VALS(rpl_secure_algorithm_vals), 0x0,
             "The Security Algorithm field specifies the encryption, MAC, and signature scheme the network uses", HFILL }},
        { &hf_icmpv6_rpl_secure_kim,
           { "Key Identifier Mode (KIM)", "icmpv6.rpl.secure.kim", FT_UINT8, BASE_DEC, NULL, RPL_SECURE_KIM,
             "That indicates whether the key used for packet protection is determined implicitly or explicitly and indicates the particular representation of the Key Identifier field", HFILL }},
        { &hf_icmpv6_rpl_secure_lvl,
           { "Security Level (LVL)", "icmpv6.rpl.secure.lvl", FT_UINT8, BASE_DEC, NULL, RPL_SECURE_LVL,
             "Indicates the provided packet protection", HFILL }},
        { &hf_icmpv6_rpl_secure_rsv,
           { "Reserved", "icmpv6.rpl.secure.rsv", FT_UINT8, BASE_DEC, NULL, RPL_SECURE_RSV,
             "Must be zero", HFILL }},
        { &hf_icmpv6_rpl_secure_counter,
           { "Counter", "icmpv6.rpl.secure.counter", FT_UINT32, BASE_DEC, NULL, 0x0,
             "Indicates the non-repeating 4-octet value used to construct the cryptographic mechanism that implements packet protection and allows for the provision of semantic security", HFILL }},
        { &hf_icmpv6_rpl_secure_key_source,
           { "Key Source", "icmpv6.rpl.secure.key.source", FT_BYTES, BASE_NONE, NULL, 0x0,
             "Indicates the logical identifier of the originator of a group key", HFILL }},
        { &hf_icmpv6_rpl_secure_key_index,
           { "Key Source", "icmpv6.rpl.secure.key.index", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Allows unique identification of different keys with the same originator", HFILL }},
        { &hf_icmpv6_rpl_opt,
          { "ICMPv6 RPL Option", "icmpv6.opt", FT_NONE, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_type,
          { "Type", "icmpv6.rpl.opt.type", FT_UINT8, BASE_DEC, VALS(rpl_option_vals), 0x0,
            "Options type", HFILL }},
        { &hf_icmpv6_rpl_opt_length,
          { "Length", "icmpv6.rpl.opt.length", FT_UINT8, BASE_DEC, NULL, 0x0,
            "The length of the option in octets excluding the Type and Length fields", HFILL }},
        { &hf_icmpv6_rpl_opt_reserved,
          { "Reserved", "icmpv6.rpl.opt.reserved", FT_NONE, BASE_NONE, NULL, 0x0,
            "Reserved (Must be 0)", HFILL }},
        { &hf_icmpv6_rpl_opt_padn,
          { "Paddn", "icmpv6.rpl.opt.padn", FT_NONE, BASE_NONE, NULL, 0x0,
            "Padding (Must be 0)", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_type,
          { "Routing Metric/Constraint Type", "icmpv6.rpl.opt.metric.type", FT_UINT8, BASE_DEC, VALS(rpl_metric_vals), 0x0,
            "The Routing Metric/Constraint Type field uniquely identifies each Routing Metric/Constraint object. RFC 6551", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_flags,
          { "Flags","icmpv6.rpl.opt.metric.flags", FT_UINT16, BASE_HEX, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_metric_reserved,
          { "Reserved Flags","icmpv6.rpl.opt.metric.reserved", FT_UINT16, BASE_HEX, NULL, RPL_METRIC_RESERVED,
            "Reserved (Must be Zero)", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_flag_p,
          { "Flag P","icmpv6.rpl.opt.metric.flag.p", FT_BOOLEAN, 16, TFS(&tfs_set_notset), RPL_METRIC_FLAG_P,
            "Only used for recorded metrics.  When cleared, all nodes along the path successfully recorded the corresponding metric. When set, this indicates that one or several nodes along the path could not record the metric", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_flag_c,
          { "Flag C","icmpv6.rpl.opt.metric.flag.c", FT_BOOLEAN, 16, TFS(&tfs_set_notset), RPL_METRIC_FLAG_C,
            "When set, this indicates that the object refers to a routing constraint. When cleared, the object refers to a routing metric.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_flag_o,
          { "Flag O","icmpv6.rpl.opt.metric.flag.o", FT_BOOLEAN, 16, TFS(&tfs_set_notset), RPL_METRIC_FLAG_O,
            "Used exclusively for routing constraints. When set, this indicates that the constraint is optional. When cleared, the constraint is mandatory.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_flag_r,
          { "Flag R","icmpv6.rpl.opt.metric.flag.r", FT_BOOLEAN, 16, TFS(&tfs_set_notset), RPL_METRIC_FLAG_R,
            "Only relevant for a routing metric. When set, this indicates that the routing metric is recorded along the path. When cleared, the routing metric is aggregated", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_a,
          { "A Field","icmpv6.rpl.opt.metric.flag.a", FT_UINT16, BASE_HEX, NULL, RPL_METRIC_A,
            "Only relevant for metrics, it indicates whether the aggregated routing metric is additive, is multiplicative, reports a maximum, or reports a minimum", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_prec,
          { "Precedence field","icmpv6.rpl.opt.metric.prec", FT_UINT16, BASE_HEX, NULL, RPL_METRIC_PREC,
            "It indicates the precedence of this Routing Metric/Constraint object relative to other objects in the container", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_len,
          { "Metric Length", "icmpv6.rpl.opt.metric.length", FT_UINT8, BASE_DEC, NULL, 0x0,
            "The length of the object body, expressed in bytes.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_nsa_object,
          { "Node State and Attribute Object","icmpv6.rpl.opt.metric.nsa.object", FT_UINT16, BASE_HEX, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_metric_nsa_object_reserved,
          { "Reserved field","icmpv6.rpl.opt.metric.nsa.object.reserved", FT_UINT16, BASE_HEX, NULL, RPL_METRIC_NSA_OBJECT_RESERVED,
            "Reserved (Must be Zero)", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_nsa_object_flags,
          { "Flags","icmpv6.rpl.opt.metric.nsa.object.flags", FT_UINT16, BASE_HEX, NULL, RPL_METRIC_NSA_OBJECT_FLAGS,
            "Unspecified flags (Must be Zero)", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_nsa_object_flag_a,
          { "Flag A", "icmpv6.rpl.opt.metric.nsa.object.flag.a", FT_BOOLEAN, 16, TFS(&tfs_set_notset), RPL_METRIC_NSA_OBJECT_FLAG_A,
            "When set, this indicates that the node can act as a traffic aggregator.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_nsa_object_flag_o,
          { "Flag O", "icmpv6.rpl.opt.metric.nsa.object.flag.o", FT_BOOLEAN, 16, TFS(&tfs_set_notset), RPL_METRIC_NSA_OBJECT_FLAG_O,
            "When set, this indicates that the node is overloaded and may not be able to process traffic.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_nsa_object_opttlv_object,
          { "Node State and Attribute Optional TLV", "icmpv6.rpl.opt.metric.nsa.object.opttlv.object", FT_UINT8, BASE_DEC, NULL, 0x0,
            "Optional TLV.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_nsa_object_opttlv_object_type,
          { "Node State and Attribute Optional TLV Type", "icmpv6.rpl.opt.metric.nsa.object.opttlv.object.type", FT_UINT8, BASE_DEC, NULL, 0x0,
            "Optional TLV type.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_nsa_object_opttlv_object_length,
          { "Node State and Attribute Optional TLV Length", "icmpv6.rpl.opt.metric.nsa.object.opttlv.object.length", FT_UINT8, BASE_DEC, NULL, 0x0,
            "The length of the option in octets excluding the Type and Length fields", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_nsa_object_opttlv_object_data,
          { "Raw Data", "icmpv6.rpl.opt.metric.nsa.object.opttlv.object.data", FT_BYTES, BASE_NONE, NULL, 0x0,
            "The raw data in the TLV", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_ne_object,
          { "Node Energy Object","icmpv6.rpl.opt.metric.ne.object", FT_UINT16, BASE_HEX, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_metric_ne_object_flags,
          { "Flags field","icmpv6.rpl.opt.metric.ne.object.flags", FT_UINT16, BASE_HEX, NULL, RPL_METRIC_NE_OBJECT_FLAGS,
            "Unspecified flags (Must be Zero)", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_ne_object_flag_i,
          { "Flag I","icmpv6.rpl.opt.metric.ne.object.flag.i", FT_BOOLEAN, 16, TFS(&tfs_set_notset), RPL_METRIC_NE_OBJECT_FLAG_I,
            "Only relevant when the node type is used as a constraint. When set, this indicates that nodes of the type specified in the node type field MUST be included", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_ne_object_type,
          { "Type", "icmpv6.rpl.opt.metric.ne.object.type", FT_UINT16, BASE_HEX, NULL, RPL_METRIC_NE_OBJECT_TYPE,
            "T=0 designates a mains-powered node, T=1 a battery-powered node, and T=2 a node powered by an energy scavenger.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_ne_object_flag_e,
          { "Flag E", "icmpv6.rpl.opt.metric.ne.object.flag.e", FT_BOOLEAN, 16, TFS(&tfs_set_notset), RPL_METRIC_NE_OBJECT_FLAG_E,
            "When the 'E' bit is set for a metric, the estimated percentage of remaining energy on the node is indicated in the Energy 8-bit field. When cleared, the estimated percentage of remaining energy is not provided. When the 'E' bit is set for a constraint, the E_E field defines a threshold for the inclusion/exclusion: if an inclusion, nodes with values higher than the threshold are to be included; if an exclusion, nodes with values lower than the threshold are to be excluded.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_ne_object_energy,
          { "Energy", "icmpv6.rpl.opt.metric.ne.object.energy", FT_UINT16, BASE_HEX, NULL, RPL_METRIC_NE_OBJECT_ENERGY,
            "8-bit unsigned integer field indicating an estimated percentage of remaining energy. The Energy field is only relevant when the 'E' flag is set, and it MUST be set to 0 when the 'E' flag is cleared.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_hp_object,
          { "Hop Count Object","icmpv6.rpl.opt.metric.hp.object", FT_UINT16, BASE_HEX, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_metric_hp_object_reserved,
          { "Reserved field","icmpv6.rpl.opt.metric.hp.object.reserved", FT_UINT16, BASE_HEX, NULL, RPL_METRIC_HP_OBJECT_RESERVED,
            "Reserved (Must be Zero)", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_hp_object_flags,
          { "Flags","icmpv6.rpl.opt.metric.hp.object.flags", FT_UINT16, BASE_HEX, NULL, RPL_METRIC_HP_OBJECT_FLAGS,
            "Reserved (Must be Zero)", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_hp_object_hp,
          { "Hop Count", "icmpv6.rpl.opt.metric.hp.object.hp", FT_UINT16, BASE_DEC, NULL, RPL_METRIC_HP_OBJECT_HP,
            "When used as a constraint, the DAG root indicates the maximum number of hops that a path may traverse. When used as a metric, each visited node simply increments the Hop Count field.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_lt_object_lt,
          { "Link Throughput", "icmpv6.rpl.opt.metric.lt.object.lt", FT_UINT32, BASE_DEC, NULL, 0x0,
            "The Throughput metric is the effective bit rate of a link.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_ll_object_ll,
          { "Link Latency", "icmpv6.rpl.opt.metric.ll.object.ll", FT_UINT32, BASE_DEC, NULL, 0x0,
            "The Latency is encoded in 32 bits in unsigned integer format, expressed in microseconds.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_lql_object,
          { "Link Quality Level Object","icmpv6.rpl.opt.metric.lql.object", FT_UINT8, BASE_HEX, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_metric_lql_object_res,
          { "Reserved field","icmpv6.rpl.opt.metric.lql.object.res", FT_UINT8, BASE_HEX, NULL, RPL_METRIC_LQL_OBJECT_RES,
            "Reserved (Must be Zero)", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_lql_object_val,
          { "Val(ue)","icmpv6.rpl.opt.metric.lql.object.val", FT_UINT8, BASE_HEX, NULL, RPL_METRIC_LQL_OBJECT_VAL,
            "LQL value from 0 to 7 where 0 means undetermined and 1 indicates the highest link quality.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_lql_object_counter,
          { "Counter", "icmpv6.rpl.opt.metric.lql.object.counter", FT_UINT8, BASE_DEC, NULL, RPL_METRIC_LQL_OBJECT_COUNTER,
            "The Counter represents the number of links with that value.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_etx_object_etx,
          { "ETX", "icmpv6.rpl.opt.metric.etx.object.etx", FT_UINT16, BASE_DEC, NULL, 0x0,
            "The ETX metric is the number of transmissions a node expects to make to a destination in order to successfully deliver a packet.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_lc_object,
          { "Link Color Object","icmpv6.rpl.opt.metric.lc.object", FT_NONE, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_metric_lc_object_res,
          { "Reserved field","icmpv6.rpl.opt.metric.lc.object.res", FT_UINT8, BASE_HEX, NULL, RPL_METRIC_LC_OBJECT_RES,
            "Reserved (Must be Zero)", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_lc_object_lc,
          { "Link Color","icmpv6.rpl.opt.metric.lc.object.lc", FT_UINT16, BASE_HEX, NULL, RPL_METRIC_LC_OBJECT_LC,
            "The Link Color (LC) object is an administrative 10-bit link constraint used to avoid or attract specific links for specific traffic types.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_lc_object_counter,
          { "Counter", "icmpv6.rpl.opt.metric.lc.object.counter", FT_UINT16, BASE_DEC, NULL, RPL_METRIC_LC_OBJECT_COUNTER,
            "The Counter is used to compress the information where the number of links for each Link Color is reported.", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_lc_object_reserved,
          { "Reserved", "icmpv6.rpl.opt.metric.lc.object.reserved", FT_UINT16, BASE_DEC, NULL, RPL_METRIC_LC_OBJECT_RESERVED,
            "Reserved (Must be Zero).", HFILL }},
        { &hf_icmpv6_rpl_opt_metric_lc_object_flag_i,
          { "Flag I", "icmpv6.rpl.opt.metric.lc.object.flag.i", FT_UINT16, BASE_DEC, NULL, RPL_METRIC_LC_OBJECT_FLAG_I,
            "The 'I' bit is only relevant when the Link Color is used as a constraint. When set, this indicates that links with the specified color must be included.", HFILL }},
        { &hf_icmpv6_rpl_opt_route_prefix_length,
           { "Prefix Length", "icmpv6.rpl.opt.route.prefix_length", FT_UINT8, BASE_DEC, NULL, 0x0,
             "The number of leading bits in the Prefix that are valid", HFILL }},
        { &hf_icmpv6_rpl_opt_route_flag,
           { "Flag","icmpv6.rpl.opt.route.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_route_pref,
           { "Preference","icmpv6.rpl.opt.route.pref", FT_UINT8, BASE_DEC, VALS(nd_flag_router_pref), RPL_OPT_ROUTE_PREFERENCE,
             "The Route Preference indicates whether to prefer the router associated with this prefix over others, when multiple identical prefixes (for different routers) have been received", HFILL }},
        { &hf_icmpv6_rpl_opt_route_reserved,
           { "Reserved","icmpv6.rpl.opt.route.reserved", FT_UINT8, BASE_DEC, NULL, RPL_OPT_ROUTE_RESERVED,
             "Reserved (Must be Zero)", HFILL }},
        { &hf_icmpv6_rpl_opt_route_lifetime,
           { "Route Lifetime", "icmpv6.rpl.opt.route.lifetime", FT_UINT32, BASE_DEC|BASE_SPECIAL_VALS, VALS(unique_infinity), 0x0,
             "The length of time in seconds (relative to the time the packet is sent) that the prefix is valid for route determination", HFILL }},
        { &hf_icmpv6_rpl_opt_route_prefix,
           { "Prefix", "icmpv6.rpl.opt.route.prefix", FT_IPv6, BASE_NONE, NULL, 0x0,
             "Variable-length field containing an IP address or a prefix of an IPv6 address", HFILL }},
        { &hf_icmpv6_rpl_opt_config_flag,
           { "Flag","icmpv6.rpl.opt.config.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_config_reserved,
           { "Reserved","icmpv6.rpl.opt.config.reserved", FT_UINT8, BASE_DEC, NULL, RPL_OPT_CONFIG_FLAG_RESERVED,
             "Must be Zero", HFILL }},
        { &hf_icmpv6_rpl_opt_config_auth,
           { "Authentication Enabled","icmpv6.rpl.opt.config.auth", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RPL_OPT_CONFIG_FLAG_AUTH,
             "One bit flag describing the security mode of the network", HFILL }},
        { &hf_icmpv6_rpl_opt_config_pcs,
           { "Path Control Size", "icmpv6.rpl.opt.config.pcs", FT_UINT8, BASE_DEC, NULL, RPL_OPT_CONFIG_FLAG_PCS,
             "Used to configure the number of bits that may be allocated to the Path Control field", HFILL }},
        { &hf_icmpv6_rpl_opt_config_doublings,
           { "DIOIntervalDoublings","icmpv6.rpl.opt.config.interval_double", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Used to configure Imax of the DIO trickle timer", HFILL }},
        { &hf_icmpv6_rpl_opt_config_min_interval,
           { "DIOIntervalMin", "icmpv6.rpl.opt.config.interval_min", FT_UINT16, BASE_DEC, NULL, 0x0,
             "Used to configure Imin of the DIO trickle timer", HFILL }},
        { &hf_icmpv6_rpl_opt_config_redundancy,
           { "DIORedundancyConstant", "icmpv6.rpl.opt.config.redundancy", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Used to configure k of the DIO trickle timer", HFILL }},
        { &hf_icmpv6_rpl_opt_config_rank_incr,
           { "MaxRankInc", "icmpv6.rpl.opt.config.max_rank_inc", FT_UINT16, BASE_DEC, NULL, 0x0,
             "Used to configure DAGMaxRankIncrease", HFILL }},
        { &hf_icmpv6_rpl_opt_config_hop_rank_inc,
           { "MinHopRankInc", "icmpv6.rpl.opt.config.min_hop_rank_inc", FT_UINT16, BASE_DEC, NULL, 0x0,
              "Used to configure MinHopRankIncrease", HFILL }},
        { &hf_icmpv6_rpl_opt_config_ocp,
           { "OCP (Objective Code Point)","icmpv6.rpl.opt.config.ocp", FT_UINT16, BASE_DEC, VALS(rpl_ocp_vals), 0x0,
              "The OCP field identifies the OF and is managed by the IANA", HFILL }},
        { &hf_icmpv6_rpl_opt_config_rsv,
           { "Reserved", "icmpv6.rpl.opt.config.rsv", FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_config_def_lifetime,
           { "Default Lifetime", "icmpv6.rpl.opt.config.def_lifetime", FT_UINT8, BASE_DEC, NULL, 0x0,
              "This is the lifetime that is used as default for all RPL routes", HFILL }},
        { &hf_icmpv6_rpl_opt_config_lifetime_unit,
           { "Lifetime Unit", "icmpv6.rpl.opt.config.lifetime_unit", FT_UINT16, BASE_DEC|BASE_UNIT_STRING, UNS(&units_seconds), 0x0,
              "Provides the unit in seconds that is used to express route lifetimes in RPL", HFILL }},
        { &hf_icmpv6_rpl_opt_target_flag,
           { "Reserved", "icmpv6.rpl.opt.target.flag", FT_NONE, BASE_NONE, NULL, 0x0,
              "Unused field reserved for flags", HFILL }},
        { &hf_icmpv6_rpl_opt_target_prefix_length,
           { "Target Length", "icmpv6.rpl.opt.target.prefix_length", FT_UINT8, BASE_DEC, NULL, 0x0,
              "Number of valid leading bits in the IPv6 Prefix", HFILL }},
        { &hf_icmpv6_rpl_opt_target_prefix,
           { "Target", "icmpv6.rpl.opt.target.prefix", FT_IPv6, BASE_NONE, NULL, 0x0,
              "Identifying an IPv6 destination address, prefix, or multicast group", HFILL }},
        { &hf_icmpv6_rpl_opt_transit_flag,
           { "Flags", "icmpv6.rpl.opt.transit.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
             NULL, HFILL }},
         { &hf_icmpv6_rpl_opt_transit_flag_e,
           { "External", "icmpv6.rpl.opt.transit.flag.e", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RPL_OPT_TRANSIT_FLAG_E,
             "Indicate that the parent router redistributes external targets into the RPL network", HFILL }},
         { &hf_icmpv6_rpl_opt_transit_flag_i,
           { "InvalidatePreviousRoute", "icmpv6.rpl.opt.transit.flag.i", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RPL_OPT_TRANSIT_FLAG_I,
             "Indicate to the common ancestor that it wishes to invalidate any previous route between the two paths", HFILL }},
         { &hf_icmpv6_rpl_opt_transit_flag_rsv,
           { "Reserved", "icmpv6.rpl.opt.transit.flag.rsv", FT_UINT8, BASE_DEC, NULL, RPL_OPT_TRANSIT_FLAG_RSV,
             "Must be Zero", HFILL }},
        { &hf_icmpv6_rpl_opt_transit_pathctl,
           { "Path Control", "icmpv6.rpl.opt.transit.pathctl", FT_UINT8, BASE_HEX, NULL, 0x0,
              "Limits the number of DAO-Parents to which a DAO message advertising connectivity", HFILL }},
        { &hf_icmpv6_rpl_opt_transit_pathctl_pc1,
           { "PC1", "icmpv6.rpl.opt.transit.pathctl.pc1", FT_UINT8, BASE_HEX, NULL, RPL_OPT_TRANSIT_PATHCTL_PC1,
              NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_transit_pathctl_pc2,
           { "PC2", "icmpv6.rpl.opt.transit.pathctl.pc2", FT_UINT8, BASE_HEX, NULL, RPL_OPT_TRANSIT_PATHCTL_PC2,
              NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_transit_pathctl_pc3,
           { "PC3", "icmpv6.rpl.opt.transit.pathctl.pc3", FT_UINT8, BASE_HEX, NULL, RPL_OPT_TRANSIT_PATHCTL_PC3,
              NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_transit_pathctl_pc4,
           { "PC4", "icmpv6.rpl.opt.transit.pathctl.pc4", FT_UINT8, BASE_HEX, NULL, RPL_OPT_TRANSIT_PATHCTL_PC4,
              NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_transit_pathseq,
           { "Path Sequence", "icmpv6.rpl.opt.transit.pathseq", FT_UINT8, BASE_DEC, NULL, 0x0,
              "Increments the Path Sequence each time it issues a RPL Target option with updated information", HFILL }},
        { &hf_icmpv6_rpl_opt_transit_pathlifetime,
           { "Path Lifetime", "icmpv6.rpl.opt.transit.pathlifetime", FT_UINT8, BASE_DEC, NULL, 0x0,
              "The length of time in Lifetime Units that the prefix is valid for route determination", HFILL }},
        { &hf_icmpv6_rpl_opt_transit_parent,
           { "Parent Address", "icmpv6.rpl.opt.transit.parent", FT_IPv6, BASE_NONE, NULL, 0x0,
              "IPv6 Address of the DODAG Parent of the node originally issuing the Transit Information Option", HFILL }},
        { &hf_icmpv6_rpl_opt_solicited_instance,
           { "Instance", "icmpv6.rpl.opt.solicited.instance", FT_UINT8, BASE_DEC, NULL, 0x0,
              "Containing the RPLInstanceID that is being solicited when valid", HFILL }},
        { &hf_icmpv6_rpl_opt_solicited_flag,
           { "Flag", "icmpv6.rpl.opt.solicited.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
              NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_solicited_flag_v,
           { "Version predicate", "icmpv6.rpl.opt.solicited.flag.v", FT_BOOLEAN, 8, NULL, RPL_OPT_SOLICITED_FLAG_V,
              "The Version predicate is true if the receiver's DODAGVersionNumber matches the requested Version Number", HFILL }},
        { &hf_icmpv6_rpl_opt_solicited_flag_i,
           { "InstanceID predicate","icmpv6.rpl.opt.solicited.flag.i", FT_BOOLEAN, 8, NULL, RPL_OPT_SOLICITED_FLAG_I,
              "The InstanceID predicate is true when the RPL node's current RPLInstanceID matches the requested RPLInstanceID", HFILL }},
        { &hf_icmpv6_rpl_opt_solicited_flag_d,
           { "DODAGID predicate", "icmpv6.rpl.opt.solicited.flag.d", FT_BOOLEAN, 8, NULL, RPL_OPT_SOLICITED_FLAG_D,
              "The DODAGID predicate is true if the RPL node's parent set has the same DODAGID as the DODAGID field", HFILL }},
         { &hf_icmpv6_rpl_opt_solicited_flag_rsv,
           { "Reserved", "icmpv6.rpl.opt.solicited.flag.rsv", FT_UINT8, BASE_DEC, NULL, RPL_OPT_SOLICITED_FLAG_RSV,
             "Must be Zero", HFILL }},
        { &hf_icmpv6_rpl_opt_solicited_dodagid,
           { "DODAGID", "icmpv6.rpl.opt.solicited.dodagid", FT_IPv6, BASE_NONE, NULL, 0x0,
              "the DODAGID that is being solicited when valid", HFILL }},
        { &hf_icmpv6_rpl_opt_solicited_version,
           { "Version", "icmpv6.rpl.opt.solicited.version", FT_UINT8, BASE_DEC, NULL, 0x0,
              "the value of  DODAGVersionNumber that is being solicited when valid", HFILL }},

        { &hf_icmpv6_rpl_opt_prefix_length,
           { "Prefix Length", "icmpv6.rpl.opt.prefix.length", FT_UINT8, BASE_DEC, NULL, 0x0,
             "The number of leading bits in the Prefix that are valid", HFILL }},
        { &hf_icmpv6_rpl_opt_prefix_flag,
           { "Flag", "icmpv6.rpl.opt.prefix.flag", FT_UINT8, BASE_HEX, NULL, 0x0,
             NULL, HFILL }},
        { &hf_icmpv6_rpl_opt_prefix_flag_l,
           { "On Link", "icmpv6.rpl.opt.prefix.flag.l", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RPL_OPT_PREFIX_FLAG_L,
             "When set, indicates that this prefix can be used for on-link determination", HFILL }},
        { &hf_icmpv6_rpl_opt_prefix_flag_a,
           { "Auto Address Config","icmpv6.rpl.opt.config.flag.a", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RPL_OPT_PREFIX_FLAG_A,
             "When set indicates that this prefix can be used for stateless address configuration", HFILL }},
        { &hf_icmpv6_rpl_opt_prefix_flag_r,
           { "Router Address", "icmpv6.rpl.opt.config.flag.r", FT_BOOLEAN, 8, TFS(&tfs_set_notset), RPL_OPT_PREFIX_FLAG_R,
             "When set, indicates that the Prefix field contains a complete IPv6 address assigned to the sending router that can be used as parent in a target option", HFILL }},
        { &hf_icmpv6_rpl_opt_prefix_flag_rsv,
           { "Reserved", "icmpv6.rpl.opt.config.flag.rsv", FT_UINT8, BASE_DEC, NULL, RPL_OPT_PREFIX_FLAG_RSV,
             "Must Be Zero", HFILL }},
        { &hf_icmpv6_rpl_opt_prefix_vlifetime,
           { "Valid Lifetime", "icmpv6.rpl.opt.prefix.valid_lifetime", FT_UINT32, BASE_DEC|BASE_SPECIAL_VALS, VALS(unique_infinity), 0x0,
             "The length of time in seconds that the prefix is valid for the purpose of on-link determination", HFILL }},
        { &hf_icmpv6_rpl_opt_prefix_plifetime,
           { "Preferred Lifetime", "icmpv6.rpl.opt.prefix.preferred_lifetime", FT_UINT32, BASE_DEC|BASE_SPECIAL_VALS, VALS(unique_infinity), 0x0,
             "The length of time in seconds that addresses generated from the prefix via stateless address autoconfiguration remain preferred", HFILL }},
        { &hf_icmpv6_rpl_opt_prefix,
           { "Destination Prefix", "icmpv6.rpl.opt.prefix", FT_IPv6, BASE_NONE, NULL, 0x0,
             "An IPv6 address or a prefix of an IPv6 address", HFILL }},
        { &hf_icmpv6_rpl_opt_targetdesc,
           { "Descriptor", "icmpv6.rpl.opt.targetdesc.descriptor", FT_UINT32, BASE_HEX, NULL, 0x0,
             "Opaque Data", HFILL }},

        { &hf_icmpv6_rpl_opt_route_discovery_flag,
           { "Flags", "icmpv6.rpl.opt.routediscovery.flag", FT_NONE, BASE_NONE, NULL, 0x0,
             "NULL", HFILL }},
        { &hf_icmpv6_rpl_opt_route_discovery_reply,
           { "Reply", "icmpv6.rpl.opt.routediscovery.flag.reply", FT_BOOLEAN, 8, TFS(&tfs_yes_no), RPL_OPT_ROUTE_DISCOVERY_R,
             "The Origin sets this flag to one to allow the Target(s) to send P2P-DRO messages back to the Origin", HFILL }},
        { &hf_icmpv6_rpl_opt_route_discovery_hop_by_hop,
           { "Hop-by-Hop", "icmpv6.rpl.opt.routediscovery.flag.hopbyhop", FT_BOOLEAN, 8, TFS(&tfs_yes_no), RPL_OPT_ROUTE_DISCOVERY_H,
             "The Origin sets this flag to one if it desires Hop-by-hop Routes and to zero if it desires Source Routes.", HFILL }},
        { &hf_icmpv6_rpl_opt_route_discovery_num_of_routes,
           { "Number of Routes", "icmpv6.rpl.opt.routediscovery.flag.numofroutes", FT_UINT8, BASE_DEC, NULL, RPL_OPT_ROUTE_DISCOVERY_N,
             "This value plus one indicates the number of Source Routes that each Target should convey to the Origin", HFILL }},
        { &hf_icmpv6_rpl_opt_route_discovery_compr,
           { "Compr", "icmpv6.rpl.opt.routediscovery.flag.compr", FT_UINT8, BASE_DEC, NULL, RPL_OPT_ROUTE_DISCOVERY_COMPR,
             "Number of prefix octets that are elided from the Target field and Address vector", HFILL }},
        { &hf_icmpv6_rpl_opt_route_discovery_lifetime,
           { "Lifetime", "icmpv6.rpl.opt.routediscovery.lifetime", FT_UINT8, BASE_DEC, NULL, RPL_OPT_ROUTE_DISCOVERY_L,
             "Lifetime of the temporary DODAG", HFILL }},
        { &hf_icmpv6_rpl_opt_route_discovery_maxrank,
           { "MaxRank", "icmpv6.rpl.opt.routediscovery.maxrank", FT_UINT8, BASE_DEC, NULL, RPL_OPT_ROUTE_DISCOVERY_MR_NH,
             "Upper limit of the integer portion of the rank when used inside a DIO", HFILL }},
        { &hf_icmpv6_rpl_opt_route_discovery_nh,
           { "NH", "icmpv6.rpl.opt.routediscovery.nh", FT_UINT8, BASE_DEC, NULL, RPL_OPT_ROUTE_DISCOVERY_MR_NH,
             "Index of the next-hop (NH) address inside the Address vector", HFILL }},
        { &hf_icmpv6_rpl_opt_route_discovery_target_addr,
           { "Target Address", "icmpv6.rpl.opt.routediscovery.targetaddr", FT_IPv6, BASE_NONE, NULL, 0x0,
             "An IPv6 address of the Target after eliding Compr number of prefix octets", HFILL }},
        { &hf_icmpv6_rpl_opt_route_discovery_addr_vec,
           { "Address Vector", "icmpv6.rpl.opt.routediscovery.addr_vec", FT_NONE, BASE_NONE, NULL, 0x0,
             "NULL", HFILL }},
        { &hf_icmpv6_rpl_opt_route_discovery_addr_vec_addr,
          { "Address", "icmpv6.rpl.opt.routediscovery.addrvec.addr", FT_IPv6, BASE_NONE, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_rpl_p2p_dro_instance,
           { "RPLInstanceID", "icmpv6.rpl.p2p.dro.instance", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Set by the DODAG root that indicates which RPL Instance the DODAG is part of", HFILL }},
        { &hf_icmpv6_rpl_p2p_dro_version,
           { "Version", "icmpv6.rpl.p2p.dro.version", FT_UINT8, BASE_DEC, NULL, 0x0,
             "Set by the DODAG root to the DODAGVersionNumber", HFILL }},
        { &hf_icmpv6_rpl_p2p_dro_flag,
           { "Flags", "icmpv6.rpl.p2p.dro.flag", FT_UINT16, BASE_HEX, NULL, 0x0,
             "NULL", HFILL }},
        { &hf_icmpv6_rpl_p2p_dro_flag_stop,
           { "Stop", "icmpv6.rpl.p2p.dro.flag.stop", FT_BOOLEAN, 16, TFS(&tfs_yes_no), RPL_P2P_DRO_FLAG_S,
             "Indicates that the P2P-RPL route discovery is over", HFILL }},
        { &hf_icmpv6_rpl_p2p_dro_flag_ack,
           { "Ack", "icmpv6.rpl.p2p.dro.flag.ack", FT_BOOLEAN, 16, TFS(&tfs_yes_no), RPL_P2P_DRO_FLAG_A,
             "Indicates that the Origin MUST unicast a P2P-DRO-ACK message to the Target", HFILL }},
        { &hf_icmpv6_rpl_p2p_dro_flag_seq,
           { "Seq", "icmpv6.rpl.p2p.dro.flag.seq", FT_UINT16, BASE_DEC, NULL, RPL_P2P_DRO_FLAG_SEQ,
             "Indicates the sequence number for the P2P-DRO", HFILL }},
        { &hf_icmpv6_rpl_p2p_dro_flag_reserved,
           { "Reserved", "icmpv6.rpl.p2p.dro.flag.reserved", FT_UINT16, BASE_DEC, NULL, RPL_P2P_DRO_FLAG_RSV,
             NULL, HFILL }},
        { &hf_icmpv6_rpl_p2p_dro_dagid,
           { "DODAGID", "icmpv6.rpl.p2p.dro.dagid", FT_IPv6, BASE_NONE, NULL, 0x0,
             "IPv6 address set by a DODAG root which uniquely identifies a DODAG", HFILL }},
        { &hf_icmpv6_rpl_p2p_droack_flag,
           { "Flags", "icmpv6.rpl.p2p.droack.flag", FT_UINT16, BASE_HEX, NULL, 0x0,
             "NULL", HFILL }},
        { &hf_icmpv6_rpl_p2p_droack_flag_seq,
           { "Seq", "icmpv6.rpl.p2p.droack.flag.seq", FT_UINT16, BASE_DEC, NULL, RPL_P2P_DROACK_FLAG_SEQ,
             "Indicates the sequence number for the P2P-DRO", HFILL }},
        { &hf_icmpv6_rpl_p2p_droack_flag_reserved,
           { "Reserved", "icmpv6.rpl.p2p.droack.flag.reserved", FT_UINT16, BASE_DEC, NULL, RPL_P2P_DROACK_FLAG_RSV,
             NULL, HFILL }},

        /* RFC6743 Locator Update (156) */

        { &hf_icmpv6_ilnp_nb_locs,
          { "Num of Locs", "icmpv6.ilnp.nb_locs", FT_UINT8, BASE_DEC, NULL, 0x0,
            "The number of 64-bit Locator values that are advertised in this message", HFILL }},
        { &hf_icmpv6_ilnp_locator,
          { "Locator", "icmpv6.ilnp.nb_locator", FT_UINT64, BASE_HEX, NULL, 0x0,
            "The 64-bit Locator values currently valid for the sending ILNPv6 node", HFILL }},
        { &hf_icmpv6_ilnp_preference,
          { "Preference", "icmpv6.ilnp.nb_preference", FT_UINT32, BASE_DEC, NULL, 0x0,
            "The preferability of each Locator relative to other valid Locator values", HFILL }},
        { &hf_icmpv6_ilnp_lifetime,
          { "Lifetime", "icmpv6.ilnp.nb_lifetime", FT_UINT32, BASE_DEC, NULL, 0x0,
            "The maximum number of seconds that this particular Locator may be considered valid", HFILL }},

        /* 6lowpan-nd: Neighbour Discovery for 6LoWPAN Networks */
        { &hf_icmpv6_da_code_prefix,
          { "Code Prefix", "icmpv6.6lowpannd.da.code.prefix", FT_UINT8, BASE_DEC, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_da_code_suffix,
          { "Code Suffix", "icmpv6.6lowpannd.da.code.suffix", FT_UINT8, BASE_DEC, NULL, 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_dar_code_suffix,
          { "Code Suffix", "icmpv6.6lowpannd.dar.code.suffix", FT_UINT8, BASE_DEC, VALS(nd_opt_dar_code_suffix_val), 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_dac_code_suffix,
          { "Code Suffix", "icmpv6.6lowpannd.dac.code.suffix", FT_UINT8, BASE_DEC, VALS(nd_opt_dac_code_suffix_val), 0x0,
            NULL, HFILL }},
        { &hf_icmpv6_da_status,
          { "Status", "icmpv6.6lowpannd.da.status", FT_UINT8, BASE_DEC, VALS(nd_opt_da_status_val), 0x0,
            "Indicates the status of a registration in the DAC", HFILL }},
        { &hf_icmpv6_da_rsv,
          { "Reserved", "icmpv6.6lowpannd.da.rsv", FT_UINT8, BASE_DEC, NULL, 0x0,
            "Must be Zero", HFILL }},
        { &hf_icmpv6_da_lifetime,
          { "Lifetime", "icmpv6.6lowpannd.da.lifetime", FT_UINT16, BASE_DEC, NULL, 0x0,
            "The amount of time in a unit of 60 seconds that the router should retain the Neighbor Cache entry for the sender of the NS that includes this option", HFILL }},
        { &hf_icmpv6_da_eui64,
          { "EUI-64", "icmpv6.6lowpannd.da.eui64", FT_EUI64, BASE_NONE, NULL, 0x0,
            "This field is used to uniquely identify the interface of the registered address by including the EUI-64 identifier", HFILL }},
        { &hf_icmpv6_da_rovr,
          { "ROVR", "icmpv6.6lowpannd.da.rovr", FT_BYTES, BASE_NONE, NULL, 0x00,
            "Registration Ownership Verifier (ROVR)", HFILL }},
        { &hf_icmpv6_da_raddr,
          { "Registered Address", "icmpv6.6lowpannd.da.reg_addr", FT_IPv6, BASE_NONE, NULL, 0x0,
            "Carries the host address, which was contained in the IPv6 Source field in the NS that contained the ARO option sent by the host", HFILL }},

        /* Extended Echo - Probe - RFC8335 */
        { &hf_icmpv6_ext_echo_seq_num,
         { "Sequence number", "icmpv6.ext.echo.seq", FT_UINT8, BASE_DEC_HEX, NULL, 0x0,
           NULL, HFILL}},
        { &hf_icmpv6_ext_echo_req_reserved,
         { "Reserved", "icmpv6.ext.echo.req.res", FT_UINT8, BASE_HEX, NULL, 0xFE,
           NULL, HFILL}},
        { &hf_icmpv6_ext_echo_req_local,
         { "Local bit", "icmpv6.ext.echo.req.local", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x01,
           NULL, HFILL}},
        { &hf_icmpv6_ext_echo_rsp_state,
         { "State", "icmpv6.ext.echo.rsp.state", FT_UINT8, BASE_DEC, VALS(ext_echo_reply_state_str), 0xE0,
           NULL, HFILL}},
        { &hf_icmpv6_ext_echo_rsp_reserved,
         { "Reserved", "icmpv6.ext.echo.rsp.res", FT_UINT8, BASE_HEX, NULL, 0x18,
           NULL, HFILL}},
        { &hf_icmpv6_ext_echo_rsp_active,
         { "Active bit", "icmpv6.ext.echo.rsp.active", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x04,
           NULL, HFILL}},
        { &hf_icmpv6_ext_echo_rsp_ipv4,
         { "IPv4 bit", "icmpv6.ext.echo.rsp.ipv4", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x02,
           NULL, HFILL}},
        { &hf_icmpv6_ext_echo_rsp_ipv6,
         { "IPv6 bit", "icmpv6.ext.echo.rsp.ipv6", FT_BOOLEAN, 8, TFS(&tfs_set_notset), 0x01,
           NULL, HFILL}},

        /* Conversation-related [generated] header fields */
        { &hf_icmpv6_resp_in,
            { "Response In", "icmpv6.resp_in", FT_FRAMENUM, BASE_NONE, FRAMENUM_TYPE(FT_FRAMENUM_RESPONSE), 0x0,
              "The response to this request is in this frame", HFILL }},
        {&hf_icmpv6_no_resp,
            {"No response seen", "icmpv6.no_resp", FT_NONE, BASE_NONE, NULL, 0x0,
             "No corresponding response frame was seen", HFILL}},
        { &hf_icmpv6_resp_to,
            { "Response To", "icmpv6.resp_to", FT_FRAMENUM, BASE_NONE, FRAMENUM_TYPE(FT_FRAMENUM_REQUEST), 0x0,
              "This is the response to the request in this frame", HFILL }},
        { &hf_icmpv6_resptime,
            { "Response Time", "icmpv6.resptime", FT_DOUBLE, BASE_NONE, NULL, 0x0,
              "The time between the request and the response, in ms.", HFILL }},

        /* RFC 7731: Multicast Protocol for Low-Power and Lossy Networks (MPL) */
        { &hf_icmpv6_mpl_seed_info_min_sequence,
            { "MinSequence", "icmpv6.mpl.seed_info.min_sequence", FT_UINT8, BASE_DEC, NULL, 0x0,
              "The lower-bound sequence number for the MPL Seed.", HFILL }},
        { &hf_icmpv6_mpl_seed_info_bm_len,
            { "Buffered Messages Length", "icmpv6.mpl.seed_info.bm_len", FT_UINT8, BASE_DEC, NULL, MPL_SEED_INFO_BM_LEN,
              "The size of buffered-mpl-messages in octets.", HFILL }},
        { &hf_icmpv6_mpl_seed_info_s,
            { "Seed ID Length", "icmpv6.mpl.seed_info.s", FT_UINT8, BASE_DEC, VALS(mpl_seed_id_lengths), MPL_SEED_INFO_S,
              "The length of the seed-id.", HFILL }},
        { &hf_icmpv6_mpl_seed_info_seed_id,
            { "Seed ID", "icmpv6.mpl.seed_info.seed_id", FT_STRING, BASE_NONE, NULL, 0x0,
              NULL, HFILL }},
        { &hf_icmpv6_mpl_seed_info_sequence,
            { "Sequence", "icmpv6.mpl.seed_info.sequence", FT_UINT8, BASE_DEC, NULL, 0x0,
              NULL, HFILL }}

    };

    static int *ett[] = {
        &ett_icmpv6,
        &ett_icmpv6_opt,
        &ett_icmpv6_mar,
        &ett_icmpv6_flag_prefix,
        &ett_icmpv6_flag_map,
        &ett_icmpv6_flag_pvd_id,
        &ett_icmpv6_flag_route_info,
        &ett_icmpv6_flag_earo,
        &ett_icmpv6_flag_6lowpan,
        &ett_icmpv6_flag_efo,
        &ett_icmpv6_rpl_opt,
        &ett_icmpv6_rpl_metric_type,
        &ett_icmpv6_rpl_metric_flags,
        &ett_icmpv6_rpl_metric_nsa_object,
        &ett_icmpv6_rpl_metric_nsa_object_tlv_type,
        &ett_icmpv6_rpl_metric_ne_object,
        &ett_icmpv6_rpl_metric_hp_object,
        &ett_icmpv6_rpl_metric_lql_object,
        &ett_icmpv6_rpl_metric_lc_object,
        &ett_icmpv6_rpl_flag_routing,
        &ett_icmpv6_rpl_flag_config,
        &ett_icmpv6_rpl_flag_transit,
        &ett_icmpv6_rpl_flag_solicited,
        &ett_icmpv6_rpl_flag_prefix,
        &ett_icmpv6_rpl_route_discovery_flag,
        &ett_icmpv6_rpl_route_discovery_addr_vec,
        &ett_icmpv6_rpl_transit_pathctl,
        &ett_icmpv6_rpl_p2p_dro_flag,
        &ett_icmpv6_rpl_p2p_droack_flag,
        &ett_icmpv6_flag_ni,
        &ett_icmpv6_flag_rr,
        &ett_icmpv6_rr_mp,
        &ett_icmpv6_rr_up,
        &ett_icmpv6_rr_up_flag_mask,
        &ett_icmpv6_rr_up_flag_ra,
        &ett_icmpv6_rr_up_flag,
        &ett_icmpv6_rr_rm,
        &ett_icmpv6_rr_rm_flag,
        &ett_icmpv6_flag_mld,
        &ett_icmpv6_flag_ra,
        &ett_icmpv6_flag_na,
        &ett_icmpv6_flag_mip6,
        &ett_icmpv6_flag_fmip6,
        &ett_icmpv6_flag_secure,
        &ett_icmpv6_flag_rpl_dio,
        &ett_icmpv6_flag_rpl_dao,
        &ett_icmpv6_flag_rpl_daoack,
        &ett_icmpv6_flag_rpl_dco,
        &ett_icmpv6_flag_rpl_dcoack,
        &ett_icmpv6_flag_rpl_cc,
        &ett_icmpv6_flag_6cio,
        &ett_icmpv6_opt_name,
        &ett_icmpv6_cga_param_name,
        &ett_icmpv6_mpl_seed_info,
        &ett_icmpv6_mpl_seed_info_bm,
        &ett_icmpv6_opt_dnr_addrs
    };

    static ei_register_info ei[] = {
        { &ei_icmpv6_type_error, { "icmpv6.type.error", PI_RESPONSE_CODE, PI_NOTE, "Type indicates an error", EXPFILL }},
        { &ei_icmpv6_invalid_option_length, { "icmpv6.invalid_option_length", PI_MALFORMED, PI_ERROR, "Invalid Option Length", EXPFILL }},
        { &ei_icmpv6_opt_dnr_adn_only_mode, { "icmpv6.opt.dnr.adn_only_mode", PI_COMMENTS_GROUP, PI_CHAT, "This DNR option is in ADN-only mode", EXPFILL }},
        { &ei_icmpv6_undecoded_option, { "icmpv6.undecoded.option", PI_UNDECODED, PI_NOTE, "Undecoded option", EXPFILL }},
        { &ei_icmpv6_unknown_data, { "icmpv6.unknown_data.expert", PI_MALFORMED, PI_ERROR, "Unknown Data (not interpreted)", EXPFILL }},
        { &ei_icmpv6_undecoded_rpl_option, { "icmpv6.undecoded.rpl_option", PI_UNDECODED, PI_NOTE, "Undecoded RPL Option", EXPFILL }},
        { &ei_icmpv6_undecoded_type, { "icmpv6.undecoded.type", PI_UNDECODED, PI_NOTE, "Undecoded type", EXPFILL }},
        { &ei_icmpv6_rr_pco_mp_matchlen, { "icmpv6.rr.pco.mp.matchlen.gt128", PI_PROTOCOL, PI_WARN, "MatchLen is greater than 128", EXPFILL }},
        { &ei_icmpv6_rr_pco_mp_matchedlen, { "icmpv6.rr.pco.mp.matchedlen.gt128", PI_PROTOCOL, PI_WARN, "MatchedLen is greater than 128", EXPFILL }},
        { &ei_icmpv6_checksum, { "icmpv6.checksum_bad.expert", PI_CHECKSUM, PI_WARN, "Bad checksum", EXPFILL }},
        { &ei_icmpv6_resp_not_found, { "icmpv6.resp_not_found", PI_SEQUENCE, PI_WARN, "Response not found", EXPFILL }},
        { &ei_icmpv6_rpl_unknown_metric, { "icmpv6.rpl.unknown.metric", PI_UNDECODED, PI_NOTE, "Unknown RPL metric/constraint type", EXPFILL }},
        { &ei_icmpv6_rpl_p2p_hop_by_hop, { "icmpv6.rpl.p2p.hop_by_hop", PI_PROTOCOL, PI_WARN, "Reply MUST be set to one in order to establish a Hop-by-Hop Route", EXPFILL }},
        { &ei_icmpv6_rpl_p2p_num_of_routes, { "icmpv6.rpl.p2p.num_of_routes", PI_PROTOCOL, PI_WARN, "This field MUST be set to zero when Hop-by-Hop Routes are being discovered", EXPFILL }},
        { &ei_icmpv6_rpl_p2p_dro_rdo_zero, { "icmpv6.rpl.p2p.dro.rdo.zero", PI_PROTOCOL, PI_WARN, "This field MUST be set to zero when the P2P-RDO is included in a P2P-DRO", EXPFILL }},
        { &ei_icmpv6_rpl_p2p_dro_zero, { "icmpv6.rpl.p2p.dro.zero", PI_PROTOCOL, PI_WARN, "This field MUST be set to zero", EXPFILL }},
    };

    expert_module_t* expert_icmpv6;

    proto_icmpv6 = proto_register_protocol("Internet Control Message Protocol v6",
                                           "ICMPv6", "icmpv6");
    proto_register_field_array(proto_icmpv6, hf, array_length(hf));
    proto_register_subtree_array(ett, array_length(ett));
    expert_icmpv6 = expert_register_protocol(proto_icmpv6);
    expert_register_field_array(expert_icmpv6, ei, array_length(ei));

    register_seq_analysis("icmpv6", "ICMPv6 Flows", proto_icmpv6, NULL, TL_REQUIRES_COLUMNS, icmpv6_seq_analysis_packet);
    icmpv6_handle = register_dissector("icmpv6", dissect_icmpv6, proto_icmpv6);
    icmpv6_heur_subdissector_list = register_heur_dissector_list_with_description("icmpv6", "ICMPv6 Echo payload", proto_icmpv6);
    icmpv6_tap = register_tap("icmpv6");
}

void
proto_reg_handoff_icmpv6(void)
{
    capture_dissector_handle_t icmpv6_cap_handle;

    dissector_add_uint("ip.proto", IP_PROTO_IPV6_ICMP, icmpv6_handle);
    icmpv6_cap_handle = create_capture_dissector_handle(capture_icmpv6, proto_icmpv6);
    capture_dissector_add_uint("ip.proto", IP_PROTO_IPV6_ICMP, icmpv6_cap_handle);

    /*
     * Get a handle for the IPv6 dissector.
     */
    ipv6_handle = find_dissector_add_dependency("ipv6", proto_icmpv6);
    icmp_extension_handle = find_dissector("icmp_extension");
    svc_params_handle = find_dissector("svc_params");

    proto_ieee802154 = proto_get_id_by_filter_name(IEEE802154_PROTOABBREV_WPAN);
}

/*
 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 *
 * Local variables:
 * c-basic-offset: 4
 * tab-width: 8
 * indent-tabs-mode: nil
 * End:
 *
 * vi: set shiftwidth=4 tabstop=8 expandtab:
 * :indentSize=4:tabSize=8:noTabs=true:
 */

Coverage Report

Created: 2026-07-12 07:10