/* packet-bgp.c

 * Routines for BGP packet dissection.

 * Copyright 1999, Jun-ichiro itojun Hagino <itojun@itojun.org>

 *

 * Wireshark - Network traffic analyzer

 * By Gerald Combs <gerald@wireshark.org>

 * Copyright 1998 Gerald Combs

 *

 * SPDX-License-Identifier: GPL-2.0-or-later

 */

/* Supports:

 * RFC1771 A Border Gateway Protocol 4 (BGP-4)

 * RFC1965 Autonomous System Confederations for BGP

 * RFC1997 BGP Communities Attribute

 * RFC2547 BGP/MPLS VPNs

 * RFC2796 BGP Route Reflection An alternative to full mesh IBGP

 * RFC2842 Capabilities Advertisement with BGP-4

 * RFC2858 Multiprotocol Extensions for BGP-4

 * RFC2918 Route Refresh Capability for BGP-4

 * RFC3107 Carrying Label Information in BGP-4

 * RFC4360 BGP Extended Communities Attribute

 * RFC4486 Subcodes for BGP Cease Notification Message

 * RFC4724 Graceful Restart Mechanism for BGP

 * RFC5512 The BGP Encapsulation Subsequent Address Family Identifier (SAFI)

 * RFC5575 Dissemination of flow specification rules

 * RFC5640 Load-Balancing for Mesh Softwires

 * RFC6368 Internal BGP as the Provider/Customer Edge Protocol for

           BGP/MPLS IP Virtual Private Networks (VPNs)

 * RFC6608 Subcodes for BGP Finite State Machine Error

 * RFC6793 BGP Support for Four-Octet Autonomous System (AS) Number Space

 * RFC7311 The Accumulated IGP Metric Attribute for BGP

 * RFC7432 BGP MPLS-Based Ethernet VPN

 * RFC7752 North-Bound Distribution of Link-State and Traffic Engineering (TE)

           Information Using BGP

 * RFC8092 BGP Large Communities Attribute

 * RFC8214 Virtual Private Wire Service Support in Ethernet VPN

 * RFC9234 Route Leak Prevention and Detection Using Roles in UPDATE and OPEN Messages

 * draft-ietf-idr-dynamic-cap

 * draft-ietf-idr-bgp-enhanced-route-refresh-02

 * draft-knoll-idr-qos-attribute-03

 * draft-nalawade-kapoor-tunnel-safi-05

 * draft-ietf-idr-add-paths-04 Additional-Path for BGP-4

 * RFC9085 Border Gateway Protocol - Link State (BGP-LS) Extensions for Segment Routing

 * draft-ietf-idr-custom-decision-07 BGP Custom Decision Process

 * draft-rabadan-l2vpn-evpn-prefix-advertisement IP Prefix Advertisement

 *     in EVPN

 * RFC8669 Segment Routing Prefix Segment Identifier Extensions for BGP

 * http://www.iana.org/assignments/bgp-parameters/ (last updated 2012-04-26)

 * RFC8538 Notification Message Support for BGP Graceful Restart

 * RFC9251 Internet Group Management Protocol (IGMP) and Multicast Listener

 *         Discovery (MLD) Proxies for Ethernet VPN (EVPN)

 * draft-ietf-idr-tunnel-encaps-15

 * draft-ietf-idr-segment-routing-te-policy-08

 * draft-yu-bess-evpn-l2-attributes-04

 * draft-ietf-bess-srv6-services-05

 * RFC9104 Distribution of Traffic Engineering Extended Administrative Groups

           Using the Border Gateway Protocol - Link State

 * RFC8365 A Network Virtualization Overlay Solution Using Ethernet VPN (EVPN)

 * draft-abraitis-bgp-version-capability-13

 * draft-ietf-idr-bgp-bfd-strict-mode

 * TODO:

 * Destination Preference Attribute for BGP (work in progress)

 * RFC1863 A BGP/IDRP Route Server alternative to a full mesh routing

 */

/* (c) Copyright 2015, Pratik Yeole <pyeole@ncsu.edu>

   -  Fixed incorrect decoding of Network Layer Reachability Information (NLRI) in BGP UPDATE message with add-path support

 */

#include "config.h"

#include <epan/packet.h>

#include <epan/afn.h>

#include <epan/prefs.h>

#include <epan/expert.h>

#include <epan/to_str.h>

#include <epan/proto_data.h>

#include <epan/ipproto.h>

#include <epan/tfs.h>

#include <wsutil/str_util.h>

#include "packet-ip.h"

#include "packet-tcp.h"

#include "packet-ldp.h"

#include "packet-bgp.h"

#include "packet-eigrp.h"

void proto_register_bgp(void);

void proto_reg_handoff_bgp(void);

static dissector_handle_t bgp_handle;

/* #define MAX_STR_LEN 256 */

/* some handy things to know */

#define BGP_MAX_PACKET_SIZE            4096

#define BGP_MARKER_SIZE                  16    /* size of BGP marker */

#define BGP_HEADER_SIZE                  19    /* size of BGP header, including marker */

#define BGP_MIN_OPEN_MSG_SIZE            29

#define BGP_MIN_UPDATE_MSG_SIZE          23

#define BGP_MIN_NOTIFICATION_MSG_SIZE    21

#define BGP_MIN_KEEPALVE_MSG_SIZE       BGP_HEADER_SIZE

#define BGP_TCP_PORT                    179

#define BGP_ROUTE_DISTINGUISHER_SIZE      8

/* BGP message types */

#define BGP_OPEN          1

#define BGP_UPDATE        2

#define BGP_NOTIFICATION  3

#define BGP_KEEPALIVE     4

#define BGP_ROUTE_REFRESH 5

#define BGP_CAPABILITY    6

#define BGP_ROUTE_REFRESH_CISCO 0x80

#define BGP_SIZE_OF_PATH_ATTRIBUTE       2

/* attribute flags, from RFC1771 */

#define BGP_ATTR_FLAG_OPTIONAL        0x80

#define BGP_ATTR_FLAG_TRANSITIVE      0x40

#define BGP_ATTR_FLAG_PARTIAL         0x20

#define BGP_ATTR_FLAG_EXTENDED_LENGTH 0x10

#define BGP_ATTR_FLAG_UNUSED          0x0F

/* SSA flags */

#define BGP_SSA_TRANSITIVE    0x8000

#define BGP_SSA_TYPE          0x7FFF

/* SSA Types */

#define BGP_SSA_L2TPv3          1

#define BGP_SSA_mGRE            2

#define BGP_SSA_IPSec           3

#define BGP_SSA_MPLS            4

#define BGP_SSA_L2TPv3_IN_IPSec 5

#define BGP_SSA_mGRE_IN_IPSec   6

/* BGP MPLS information */

#define BGP_MPLS_BOTTOM_L_STACK 0x000001

#define BGP_MPLS_TRAFFIC_CLASS  0x00000E

#define BGP_MPLS_LABEL          0xFFFFF0

/* AS_PATH segment types */

#define AS_SET             1   /* RFC1771 */

#define AS_SEQUENCE        2   /* RFC1771 */

#define AS_CONFED_SET      4   /* RFC1965 has the wrong values, corrected in  */

#define AS_CONFED_SEQUENCE 3   /* draft-ietf-idr-bgp-confed-rfc1965bis-01.txt */

/* BGPsec_PATH attributes */

#define SEC_PATH_SEG_SIZE 6

/* OPEN message Optional Parameter types  */

#define BGP_OPTION_AUTHENTICATION    1   /* RFC1771 */

#define BGP_OPTION_CAPABILITY        2   /* RFC2842 */

#define BGP_OPTION_EXTENDED_LEN        255     /* RFC9072 */

/* https://www.iana.org/assignments/capability-codes/capability-codes.xhtml (last updated 2024-01-23) */

/* BGP capability code */

#define BGP_CAPABILITY_RESERVED                      0  /* RFC5492 */

#define BGP_CAPABILITY_MULTIPROTOCOL                 1  /* RFC2858 */

#define BGP_CAPABILITY_ROUTE_REFRESH                 2  /* RFC2918 */

#define BGP_CAPABILITY_COOPERATIVE_ROUTE_FILTERING   3  /* RFC5291 */

#define BGP_CAPABILITY_MULTIPLE_ROUTE_DEST           4  /* RFC8277 Deprecated */

#define BGP_CAPABILITY_EXTENDED_NEXT_HOP             5  /* RFC5549 */

#define BGP_CAPABILITY_EXTENDED_MESSAGE              6  /* draft-ietf-idr-bgp-extended-messages */

#define BGP_CAPABILITY_BGPSEC                        7  /* RFC8205 */

#define BGP_CAPABILITY_MULTIPLE_LABELS               8  /* RFC8277 */

#define BGP_CAPABILITY_BGP_ROLE                      9  /* RFC9234 */

#define BGP_CAPABILITY_GRACEFUL_RESTART             64  /* RFC4724 */

#define BGP_CAPABILITY_4_OCTET_AS_NUMBER            65  /* RFC6793 */

#define BGP_CAPABILITY_DYNAMIC_CAPABILITY_CISCO     66  /* Cisco Dynamic capability*/

#define BGP_CAPABILITY_DYNAMIC_CAPABILITY           67  /* draft-ietf-idr-dynamic-cap */

#define BGP_CAPABILITY_MULTISESSION                 68  /* draft-ietf-idr-bgp-multisession */

#define BGP_CAPABILITY_ADDITIONAL_PATHS             69  /* [RFC7911] */

#define BGP_CAPABILITY_ENHANCED_ROUTE_REFRESH       70  /* [RFC7313] */

#define BGP_CAPABILITY_LONG_LIVED_GRACEFUL_RESTART  71  /* draft-uttaro-idr-bgp-persistence */

#define BGP_CAPABILITY_CP_ORF                       72  /* [RFC7543] */

#define BGP_CAPABILITY_FQDN                         73  /* draft-walton-bgp-hostname-capability */

#define BGP_CAPABILITY_BFD_STRICT                   74  /* draft-ietf-idr-bgp-bfd-strict-mode */

#define BGP_CAPABILITY_SOFT_VERSION                 75  /* draft-abraitis-bgp-version-capability */

#define BGP_CAPABILITY_PATHS_LIMIT                  76  /* draft-abraitis-idr-addpath-paths-limit */

#define BGP_CAPABILITY_LINK_LOCAL_NEXT_HOP          77  /* draft-white-linklocal-capability */

#define BGP_CAPABILITY_ROUTE_REFRESH_CISCO         128  /* Cisco, RFC8810 */

#define BGP_CAPABILITY_RPD_CISCO                   129  /* Cisco, RFC8810 */

#define BGP_CAPABILITY_ORF_CISCO                   130  /* Cisco, RFC8810 */

#define BGP_CAPABILITY_MULTISESSION_CISCO          131  /* Cisco, RFC8810 */

#define BGP_CAPABILITY_FQDN_CISCO                  184  /* Cisco, RFC8810 */

#define BGP_CAPABILITY_OPERATIONAL_MSG_CISCO       185  /* Cisco, RFC8810 */

#define BGP_ORF_COMM            0x02 /* unknown */

#define BGP_ORF_EXTCOMM         0x03 /* unknown */

#define BGP_ORF_ASPATH          0x04 /* draft-ietf-idr-aspath-orf (expired) */

#define BGP_ORF_PREFIX          0x40 /* RFC5292 */

#define BGP_ORF_CP_ORF          0x41 /* RFC7543 */

#define BGP_ORF_VPN_PREFIX      0x42 /* draft-ietf-idr-vpn-prefix-orf-06 */

#define BGP_ORF_PREFIX_CISCO    0x80 /* Cisco, same as 0x40 */

#define BGP_ORF_COMM_CISCO      0x81 /* Cisco */

#define BGP_ORF_EXTCOMM_CISCO   0x82 /* Cisco */

#define BGP_ORF_ASPATH_CISCO    0x83 /* Cisco */

/* RFC5291 */

#define BGP_ORF_ACTION      0xc0

#define BGP_ORF_ADD         0x00

#define BGP_ORF_REMOVE      0x01

#define BGP_ORF_REMOVEALL   0x02

#define BGP_ORF_MATCH       0x20

#define BGP_ORF_PERMIT      0x00

#define BGP_ORF_DENY        0x01

/* well-known communities, as defined by IANA  */

/* https://www.iana.org/assignments/bgp-well-known-communities/bgp-well-known-communities.xhtml */

#define BGP_COMM_GRACEFUL_SHUTDOWN   0xFFFF0000

#define BGP_COMM_ACCEPT_OWN          0xFFFF0001

#define BGP_COMM_RT_FLTR_XLTD_V4     0xFFFF0002

#define BGP_COMM_RT_FLTR_V4          0xFFFF0003

#define BGP_COMM_RT_FLTR_XLTD_V6     0xFFFF0004

#define BGP_COMM_RT_FLTR_V6          0xFFFF0005

#define BGP_COMM_LLGR_STALE          0xFFFF0006

#define BGP_COMM_NO_LLGR             0xFFFF0007

#define BGP_COMM_ACCEPT_OWN_HOP      0xFFFF0008

#define BGP_COMM_STANDBY_PE          0xFFFF0009

#define BGP_COMM_BLACKHOLE           0xFFFF029A

#define BGP_COMM_NO_EXPORT           0xFFFFFF01

#define BGP_COMM_NO_ADVERTISE        0xFFFFFF02

#define BGP_COMM_NO_EXPORT_SUBCONFED 0xFFFFFF03

#define BGP_COMM_NOPEER              0xFFFFFF04

#define FOURHEX0                     0x00000000

#define FOURHEXF                     0xFFFF0000

/* IANA assigned AS */

#define BGP_AS_TRANS        23456

/* attribute types */

#define BGPTYPE_ORIGIN               1 /* RFC4271           */

#define BGPTYPE_AS_PATH              2 /* RFC4271           */

#define BGPTYPE_NEXT_HOP             3 /* RFC4271           */

#define BGPTYPE_MULTI_EXIT_DISC      4 /* RFC4271           */

#define BGPTYPE_LOCAL_PREF           5 /* RFC4271           */

#define BGPTYPE_ATOMIC_AGGREGATE     6 /* RFC4271           */

#define BGPTYPE_AGGREGATOR           7 /* RFC4271           */

#define BGPTYPE_COMMUNITIES          8 /* RFC1997           */

#define BGPTYPE_ORIGINATOR_ID        9 /* RFC4456           */

#define BGPTYPE_CLUSTER_LIST        10 /* RFC4456           */

#define BGPTYPE_DPA                 11 /* DPA (deprecated) [RFC6938]  */

#define BGPTYPE_ADVERTISER          12 /* ADVERTISER (historic) (deprecated) [RFC1863][RFC4223][RFC6938] */

#define BGPTYPE_RCID_PATH           13 /* RCID_PATH / CLUSTER_ID (historic) (deprecated) [RFC1863][RFC4223][RFC6938] */

#define BGPTYPE_MP_REACH_NLRI       14 /* RFC4760           */

#define BGPTYPE_MP_UNREACH_NLRI     15 /* RFC4760           */

#define BGPTYPE_EXTENDED_COMMUNITY  16 /* RFC4360           */

#define BGPTYPE_AS4_PATH            17 /* RFC 6793          */

#define BGPTYPE_AS4_AGGREGATOR      18 /* RFC 6793          */

#define BGPTYPE_SAFI_SPECIFIC_ATTR  19 /* SAFI Specific Attribute (SSA) (deprecated) draft-kapoor-nalawade-idr-bgp-ssa-00.txt */

#define BGPTYPE_CONNECTOR_ATTRIBUTE 20 /* Connector Attribute (deprecated) [RFC6037] */

#define BGPTYPE_AS_PATHLIMIT        21 /* AS_PATHLIMIT (deprecated) [draft-ietf-idr-as-pathlimit] */

#define BGPTYPE_PMSI_TUNNEL_ATTR    22 /* RFC6514 */

#define BGPTYPE_TUNNEL_ENCAPS_ATTR  23 /* RFC5512 */

#define BGPTYPE_TRAFFIC_ENGINEERING 24 /* Traffic Engineering [RFC5543] */

#define BGPTYPE_IPV6_ADDR_SPEC_EC   25 /* IPv6 Address Specific Extended Community [RFC5701] */

#define BGPTYPE_AIGP                26 /* RFC7311 */

#define BGPTYPE_PE_DISTING_LABLES   27 /* PE Distinguisher Labels [RFC6514] */

#define BGPTYPE_BGP_ENTROPY_LABEL   28 /* BGP Entropy Label Capability Attribute (deprecated) [RFC6790][RFC7447] */

#define BGPTYPE_LINK_STATE_ATTR     29 /* RFC7752 */

#define BGPTYPE_30                  30 /* Deprecated [RFC8093] */

#define BGPTYPE_31                  31 /* Deprecated [RFC8093] */

#define BGPTYPE_LARGE_COMMUNITY     32 /* RFC8092 */

#define BGPTYPE_BGPSEC_PATH         33 /* BGPsec_PATH [RFC8205] */

#define BGPTYPE_OTC                 35 /* BGP Only to Customer [RFC9234] */

#define BGPTYPE_D_PATH              36 /* https://tools.ietf.org/html/draft-rabadan-sajassi-bess-evpn-ipvpn-interworking-02 */

#define BGPTYPE_SFP_ATTRIBUTE       37 /* SFP Attribute [RFC9015] */

#define BGPTYPE_BFD_DISCRIMINATOR   38 /* BFD Discriminator [RFC9026] */

#define BGPTYPE_NEXT_HOP_DEP_CAP    39 /* BGP Next Hop Dependent Capabilities draft-ietf-idr-entropy-label-13 */

#define BGPTYPE_BGP_PREFIX_SID      40 /* BGP Prefix-SID [RFC8669] */

#define BGPTYPE_LINK_STATE_OLD_ATTR 99 /* squatted value used by at least 2

                                          implementations before IANA assignment */

#define BGPTYPE_ATTR_SET           128 /* RFC6368           */

#define BGPTYPE_129                129 /* Deprecated [RFC8093] */

#define BGPTYPE_241                241 /* Deprecated [RFC8093] */

#define BGPTYPE_242                242 /* Deprecated [RFC8093] */

#define BGPTYPE_243                243 /* Deprecated [RFC8093] */

/*EVPN Route Types */

#define EVPN_AD_ROUTE                   1

#define EVPN_MAC_ROUTE                  2

#define EVPN_INC_MCAST_TREE             3

#define EVPN_ETH_SEGMENT_ROUTE          4

#define EVPN_IP_PREFIX_ROUTE            5  /* draft-rabadan-l2vpn-evpn-prefix-advertisement */

#define EVPN_MC_ETHER_TAG_ROUTE         6  /* draft-ietf-bess-evpn-igmp-mld-proxy-03 */

#define EVPN_IGMP_JOIN_ROUTE            7  /* draft-ietf-bess-evpn-igmp-mld-proxy-03 */

#define EVPN_IGMP_LEAVE_ROUTE           8  /* draft-ietf-bess-evpn-igmp-mld-proxy-03 */

#define EVPN_PER_REG_I_PMSI_A_D_ROUTE   9  /* draft-ietf-bess-evpn-bum-procedure-updates-7 */

#define EVPN_S_PMSI_A_D_ROUTE           10 /* draft-ietf-bess-evpn-bum-procedure-updates-7 */

#define EVPN_LEAF_A_D_ROUTE             11 /* draft-ietf-bess-evpn-bum-procedure-updates-7 */

#define EVPN_IGMP_MC_FLAG_V1                0x01

#define EVPN_IGMP_MC_FLAG_V2                0x02

#define EVPN_IGMP_MC_FLAG_V3                0x04

#define EVPN_IGMP_MC_FLAG_IE                0x08

#define EVPN_IGMP_MC_FLAG_RESERVED          0xF0

/* NLRI type as define in BGP flow spec RFC */

#define BGPNLRI_FSPEC_DST_PFIX      1 /* RFC 5575         */

#define BGPNLRI_FSPEC_SRC_PFIX      2 /* RFC 5575         */

#define BGPNLRI_FSPEC_IP_PROTO      3 /* RFC 5575         */

#define BGPNLRI_FSPEC_PORT          4 /* RFC 5575         */

#define BGPNLRI_FSPEC_DST_PORT      5 /* RFC 5575         */

#define BGPNLRI_FSPEC_SRC_PORT      6 /* RFC 5575         */

#define BGPNLRI_FSPEC_ICMP_TP       7 /* RFC 5575         */

#define BGPNLRI_FSPEC_ICMP_CD       8 /* RFC 5575         */

#define BGPNLRI_FSPEC_TCP_FLAGS     9 /* RFC 5575         */

#define BGPNLRI_FSPEC_PCK_LEN      10 /* RFC 5575         */

#define BGPNLRI_FSPEC_DSCP         11 /* RFC 5575         */

#define BGPNLRI_FSPEC_FRAGMENT     12 /* RFC 5575         */

/* BGP flow spec NLRI operator bitmask */

#define BGPNLRI_FSPEC_END_OF_LST         0x80

#define BGPNLRI_FSPEC_AND_BIT            0x40

#define BGPNLRI_FSPEC_VAL_LEN            0x30

#define BGPNLRI_FSPEC_UNUSED_BIT4        0x08

#define BGPNLRI_FSPEC_UNUSED_BIT5        0x04

#define BGPNLRI_FSPEC_LESS_THAN          0x04

#define BGPNLRI_FSPEC_GREATER_THAN       0x02

#define BGPNLRI_FSPEC_EQUAL              0x01

#define BGPNLRI_FSPEC_TCPF_NOTBIT        0x02

#define BGPNLRI_FSPEC_TCPF_MATCHBIT      0x01

#define BGPNLRI_FSPEC_DSCP_BITMASK       0x3F

/* BGP flow spec specific filter value: TCP flags, Packet fragment ... */

#define BGPNLRI_FSPEC_TH_FIN  0x01

#define BGPNLRI_FSPEC_TH_SYN  0x02

#define BGPNLRI_FSPEC_TH_RST  0x04

#define BGPNLRI_FSPEC_TH_PUSH 0x08

#define BGPNLRI_FSPEC_TH_ACK  0x10

#define BGPNLRI_FSPEC_TH_URG  0x20

#define BGPNLRI_FSPEC_TH_ECN  0x40

#define BGPNLRI_FSPEC_TH_CWR  0x80

#define BGPNLRI_FSPEC_FG_DF   0x01

#define BGPNLRI_FSPEC_FG_ISF  0x02

#define BGPNLRI_FSPEC_FG_FF   0x04

#define BGPNLRI_FSPEC_FG_LF   0x08

/* Extended community type */

/* according to IANA's number assignment at: http://www.iana.org/assignments/bgp-extended-communities */

/* BGP transitive extended community type high octet */

/* Range 0x00-0x3f First Come First Served */

/* Range 0x80-0x8f Reserved for Experimental */

/* Range 0x90-0xbf Standards Action */

#define BGP_EXT_COM_TYPE_AUTH               0x80    /* FCFS or Standard/Early/Experimental allocated */

#define BGP_EXT_COM_TYPE_TRAN               0x40    /* Non-transitive or Transitive */

#define BGP_EXT_COM_TYPE_HIGH_TR_AS2        0x00    /* Transitive Two-Octet AS-Specific Extended Community */

#define BGP_EXT_COM_TYPE_HIGH_TR_IP4        0x01    /* Transitive IPv4-Address-specific Extended Community */

#define BGP_EXT_COM_TYPE_HIGH_TR_AS4        0x02    /* Transitive Four-Octet AS-Specific Extended Community */

#define BGP_EXT_COM_TYPE_HIGH_TR_OPAQUE     0x03    /* Transitive Opaque Extended Community */

#define BGP_EXT_COM_TYPE_HIGH_TR_QOS        0x04    /* QoS Marking [Thomas_Martin_Knoll] */

#define BGP_EXT_COM_TYPE_HIGH_TR_COS        0x05    /* CoS Capability [Thomas_Martin_Knoll] */

#define BGP_EXT_COM_TYPE_HIGH_TR_EVPN       0x06    /* EVPN (Sub-Types are defined in the "EVPN Extended Community Sub-Types" registry) */

#define BGP_EXT_COM_TYPE_HIGH_TR_FLOW_I     0x07    /* FlowSpec Transitive Extended Communities [draft-ietf-idr-flowspec-interfaceset] */

#define BGP_EXT_COM_TYPE_HIGH_TR_FLOW       0x08    /* Flow spec redirect/mirror to IP next-hop [draft-simpson-idr-flowspec-redirect] */

#define BGP_EXT_COM_TYPE_HIGH_TR_FLOW_R     0x09    /* FlowSpec Redirect to indirection-id Extended Community [draft-ietf-idr-flowspec-path-redirect] */

#define BGP_EXT_COM_TYPE_HIGH_TR_TP_CLASS   0x0a    /* Transitive Transport Class [draft-ietf-idr-bgp-ct-30] */

#define BGP_EXT_COM_TYPE_HIGH_TR_SFC        0x0b    /* Transitive SFC [RFC9015] */

#define BGP_EXT_COM_TYPE_HIGH_TR_MUP        0x0c    /* Transitive MUP Extended Community */

#define BGP_EXT_COM_TYPE_HIGH_TR_EXT        0x80    /* Generic Transitive Extended Community [RFC7153][RFC9184] */

#define BGP_EXT_COM_TYPE_HIGH_TR_EXT_2      0x81    /* Generic Transitive Extended Community Part 2 [RFC8955][RFC9184] */

#define BGP_EXT_COM_TYPE_HIGH_TR_EXT_3      0x82    /* Generic Transitive Extended Community Part 3 [RFC8955][RFC9184] */

#define BGP_EXT_COM_TYPE_HIGH_TR_EXP_EIGRP  0x88    /* EIGRP attributes - http://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/seipecec.html */

/* BGP non transitive extended community type high octet */

/* 0x40-0x7f First Come First Served */

/* 0xc0-0xcf Reserved for Experimental Use (see [RFC4360]) */

/* 0xd0-0xff Standards Action */

/* 0x45-0x7f Unassigned */

#define BGP_EXT_COM_TYPE_HIGH_NTR_AS2       0x40    /* Non-Transitive Two-Octet AS-Specific Extended Community [RFC7153] */

#define BGP_EXT_COM_TYPE_HIGH_NTR_IP4       0x41    /* Non-Transitive IPv4-Address-specific Extended Community [RFC7153] */

#define BGP_EXT_COM_TYPE_HIGH_NTR_AS4       0x42    /* Non-Transitive Four-Octet AS-Specific Extended Community [RFC7153] */

#define BGP_EXT_COM_TYPE_HIGH_NTR_OPAQUE    0x43    /* Non-Transitive Opaque Extended Community [RFC7153] */

#define BGP_EXT_COM_TYPE_HIGH_NTR_QOS       0x44    /* QoS Marking [Thomas_Martin_Knoll] */

#define BGP_EXT_COM_TYPE_HIGH_NTR_FLOWSPEC  0x47    /* FlowSpec Non-Transitive Extended Communities [draft-ietf-idr-flowspec-interfaceset] */

#define BGP_EXT_COM_TYPE_HIGH_NTR_TRANSPORT 0x4a    /* Non-Transitive Transport Class [draft-ietf-idr-bgp-ct-30] */

/* EVPN Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_EVPN_MMAC         0x00    /* MAC Mobility [draft-ietf-l2vpn-pbb-evpn] */

#define BGP_EXT_COM_STYPE_EVPN_LABEL        0x01    /* ESI MPLS Label [draft-ietf-l2vpn-evpn] */

#define BGP_EXT_COM_STYPE_EVPN_IMP          0x02    /* ES Import [draft-sajassi-l2vpn-evpn-segment-route] */

#define BGP_EXT_COM_STYPE_EVPN_ROUTERMAC    0x03    /* draft-sajassi-l2vpn-evpn-inter-subnet-forwarding */

#define BGP_EXT_COM_STYPE_EVPN_L2ATTR       0x04    /* RFC 8214 */

#define BGP_EXT_COM_STYPE_EVPN_ETREE        0x05    /* RFC 8317 */

#define BGP_EXT_COM_STYPE_EVPN_DF           0x06    /* RFC 8584 */

#define BGP_EXT_COM_STYPE_EVPN_ISID         0x07    /* draft-sajassi-bess-evpn-virtual-eth-segment */

#define BGP_EXT_COM_STYPE_EVPN_ND           0x08    /* draft-snr-bess-evpn-na-flags */

#define BGP_EXT_COM_STYPE_EVPN_MCFLAGS      0x09    /* draft-ietf-bess-evpn-igmp-mld-proxy */

#define BGP_EXT_COM_STYPE_EVPN_EVIRT0       0x0a    /* draft-ietf-bess-evpn-igmp-mld-proxy */

#define BGP_EXT_COM_STYPE_EVPN_EVIRT1       0x0b    /* draft-ietf-bess-evpn-igmp-mld-proxy */

#define BGP_EXT_COM_STYPE_EVPN_EVIRT2       0x0c    /* draft-ietf-bess-evpn-igmp-mld-proxy */

#define BGP_EXT_COM_STYPE_EVPN_EVIRT3       0x0d    /* draft-ietf-bess-evpn-igmp-mld-proxy */

#define BGP_EXT_COM_STYPE_EVPN_ATTACHCIRT   0x0e    /* draft-sajassi-bess-evpn-ac-aware-bundling */

#define BGP_EXT_COM_STYPE_EVPN_SVC_CARV_TS  0x0f    /* draft-ietf-bess-evpn-fast-df-recovery */

#define BGP_EXT_COM_STYPE_EVPN_LINK_BW      0x10    /* draft-ietf-bess-evpn-unequal-lb */

#define BGP_EXT_COM_STYPE_EVPN_RT_EC        0x15    /* draft-zzhang-idr-rt-derived-community */

/* RFC 7432 Flag single active mode */

#define BGP_EXT_COM_ESI_LABEL_FLAGS         0x01    /* bitmask: set for single active multi-homing site */

/* RFC 7432 Flag Sticky/Static MAC */

#define BGP_EXT_COM_EVPN_MMAC_STICKY        0x01    /* Bitmask: Set for sticky/static MAC address */

/* RFC 8214 Flags EVPN L2 Attributes */

#define BGP_EXT_COM_EVPN_L2ATTR_FLAG_B         0x0001  /* Backup PE */

#define BGP_EXT_COM_EVPN_L2ATTR_FLAG_P         0x0002  /* Primary PE */

#define BGP_EXT_COM_EVPN_L2ATTR_FLAG_C         0x0004  /* Control word required */

/* draft-yu-bess-evpn-l2-attributes-04 */

#define BGP_EXT_COM_EVPN_L2ATTR_FLAG_F         0x0008  /* Send and receive flow label */

#define BGP_EXT_COM_EVPN_L2ATTR_FLAG_CI        0x0010  /* CWI extended community can be included */

#define BGP_EXT_COM_EVPN_L2ATTR_FLAG_RESERVED  0xFFE0  /* Reserved */

/* RFC 8317 Flags EVPN E-Tree Attributes */

#define BGP_EXT_COM_EVPN_ETREE_FLAG_L         0x01  /* Leaf-Indication */

#define BGP_EXT_COM_EVPN_ETREE_FLAG_RESERVED  0xFE  /* Reserved */

/* EPVN route AD NLRI ESI type */

#define BGP_NLRI_EVPN_ESI_VALUE             0x00    /* ESI type 0, 9 bytes integer */

#define BGP_NLRI_EVPN_ESI_LACP              0x01    /* ESI type 1, LACP 802.1AX */

#define BGP_NLRI_EVPN_ESI_MSTP              0x02    /* ESI type 2, MSTP defined ESI */

#define BGP_NLRI_EVPN_ESI_MAC               0x03    /* ESI type 3, MAC allocated value */

#define BGP_NLRI_EVPN_ESI_RID               0x04    /* ESI type 4, Router ID as ESI */

#define BGP_NLRI_EVPN_ESI_ASN               0x05    /* ESI type 5, ASN as ESI */

#define BGP_NLRI_EVPN_ESI_RES               0xFF    /* ESI 0xFF reserved */

/* Transitive Two-Octet AS-Specific Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_AS2_RT        0x02    /* Route Target [RFC4360] */

#define BGP_EXT_COM_STYPE_AS2_RO        0x03    /* Route Origin [RFC4360] */

//#define BGP_EXT_COM_STYPE_AS2_LBW       0x04    /* Juniper Transitive Link Bandwidth */

#define BGP_EXT_COM_STYPE_AS2_OSPF_DID  0x05    /* OSPF Domain Identifier [RFC4577] */

#define BGP_EXT_COM_STYPE_AS2_RT_AGG_P  0x06    /* Route Aggregation Parameter */

#define BGP_EXT_COM_STYPE_AS2_DCOLL     0x08    /* BGP Data Collection [RFC4384] */

#define BGP_EXT_COM_STYPE_AS2_SRC_AS    0x09    /* Source AS [RFC6514] */

#define BGP_EXT_COM_STYPE_AS2_L2VPN     0x0a    /* L2VPN Identifier [RFC6074] */

#define BGP_EXT_COM_STYPE_AS2_CVPND     0x10    /* Cisco VPN-Distinguisher [Eric_Rosen] */

#define BGP_EXT_COM_STYPE_AS2_RT_REC    0x13    /* Route-Target Record [draft-ietf-bess-service-chaining] */

#define BGP_EXT_COM_STYPE_AS2_RT_EC     0x15    /* RT-derived-EC [draft-zzhang-idr-rt-derived-community] */

//#define BGP_EXT_COM_STYPE_AS2_VNI       0x80    /* Virtual-Network Identifier Extended Community */

/* Non-Transitive Two-Octet AS-Specific Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_AS2_LBW       0x04    /* Link Bandwidth Extended Community [draft-ietf-idr-link-bandwidth-00] */

#define BGP_EXT_COM_STYPE_AS2_VNI       0x80    /* Virtual-Network Identifier Extended Community [draft-drao-bgp-l3vpn-virtual-network-overlays] */

/* Transitive Four-Octet AS-Specific Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_AS4_RT        0x02    /* Route Target [RFC5668] */

#define BGP_EXT_COM_STYPE_AS4_RO        0x03    /* Route Origin [RFC5668] */

#define BGP_EXT_COM_STYPE_AS4_GEN       0x04    /* Generic (deprecated) [draft-ietf-idr-as4octet-extcomm-generic-subtype] */

#define BGP_EXT_COM_STYPE_AS4_OSPF_DID  0x05    /* OSPF Domain Identifier [RFC4577] */

#define BGP_EXT_COM_STYPE_AS4_BGP_DC    0x08    /* BGP Data Collection [RFC4384] */

#define BGP_EXT_COM_STYPE_AS4_S_AS      0x09    /* Source AS [RFC6514] */

#define BGP_EXT_COM_STYPE_AS4_CIS_V     0x10    /* Cisco VPN Identifier [Eric_Rosen] */

#define BGP_EXT_COM_STYPE_AS4_RT_REC    0x13    /* Route-Target Record [draft-ietf-bess-service-chaining] */

#define BGP_EXT_COM_STYPE_AS4_RT_EC     0x15    /* RT-derived-EC [draft-zzhang-idr-rt-derived-community] */

/* Non-Transitive Four-Octet AS-Specific Extended Community Sub-Types */

/*

 * #define BGP_EXT_COM_STYPE_AS4_GEN       0x04

 * Generic (deprecated) [draft-ietf-idr-as4octet-extcomm-generic-subtype]

*/

/* Transitive IPv4-Address-Specific Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_IP4_RT        0x02    /* Route Target [RFC4360] */

#define BGP_EXT_COM_STYPE_IP4_RO        0x03    /* Route Origin [RFC4360] */

#define BGP_EXT_COM_STYPE_IP4_IFIT_TAIL 0x04    /* IPv4-Address-Specific IFIT Tail Community [draft-wang-idr-bgp-ifit-capabilities] */

#define BGP_EXT_COM_STYPE_IP4_OSPF_DID  0x05    /* OSPF Domain Identifier [RFC4577] */

#define BGP_EXT_COM_STYPE_IP4_OSPF_RID  0x07    /* OSPF Router ID [RFC4577] */

#define BGP_EXT_COM_STYPE_IP4_NODE_TGT  0x09    /* Node Target Extended Community [draft-ietf-idr-node-target-ext-comm] */

#define BGP_EXT_COM_STYPE_IP4_L2VPN     0x0a    /* L2VPN Identifier [RFC6074] */

#define BGP_EXT_COM_STYPE_IP4_VRF_I     0x0b    /* VRF Route Import [RFC6514] */

#define BGP_EXT_COM_STYPE_IP4_FLOW_RDR  0x0c    /* Flow-spec Redirect to IPv4 [draft-ietf-idr-flowspec-redirect] */

#define BGP_EXT_COM_STYPE_IP4_CIS_D     0x10    /* Cisco VPN-Distinguisher [Eric_Rosen] */

#define BGP_EXT_COM_STYPE_IP4_SEG_NH    0x12    /* Inter-area P2MP Segmented Next-Hop [RFC7524] */

#define BGP_EXT_COM_STYPE_IP4_RT_REC    0x13    /* Route-Target Record [draft-ietf-bess-service-chaining] */

#define BGP_EXT_COM_STYPE_IP4_VRF_RNH   0x14    /* VRF-Recursive-Next-Hop-Extended-Community */

#define BGP_EXT_COM_STYPE_IP4_RT_EC     0x15    /* RT-derived-EC [draft-zzhang-idr-rt-derived-community-00] */

#define BGP_EXT_COM_STYPE_IP4_MVPN_RP   0x20    /* MVPN SA RP-address Extended Community [RFC9081] */

/* Transitive Opaque Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_OPA_COST      0x01    /* Cost Community [draft-ietf-idr-custom-decision] */

#define BGP_EXT_COM_STYPE_OPA_CP_OSPF   0x03    /* CP-ORF [RFC7543] */

#define BGP_EXT_COM_STYPE_OPA_EXTN_SRC  0x04    /* Extranet Source Extended Community [RFC7900] */

#define BGP_EXT_COM_STYPE_OPA_EXTN_SEP  0x05    /* Extranet Separation Extended Community [RFC7900] */

#define BGP_EXT_COM_STYPE_OPA_OSPF_RT   0x06    /* OSPF Route Type [RFC4577] */

#define BGP_EXT_COM_STYPE_OPA_PMSI_ATTR 0x07    /* Additional PMSI Tunnel Attribute Flags [RFC7902] */

#define BGP_EXT_COM_STYPE_OPA_CTX_LBL   0x08    /* Context-Specific Label Space ID Extended Community [RFC9573] */

#define BGP_EXT_COM_STYPE_OPA_COLOR     0x0b    /* Color Extended Community [RFC5512] */

#define BGP_EXT_COM_STYPE_OPA_ENCAP     0x0c    /* Encapsulation Extended Community [RFC5512] */

#define BGP_EXT_COM_STYPE_OPA_DGTW      0x0d    /* Default Gateway  [Yakov_Rekhter] */

#define BGP_EXT_COM_STYPE_OPA_PPMP_LBL  0x0e    /* Point-to-Point-to-Multipoint (PPMP) Label [Rishabh_Parekh] */

#define BGP_EXT_COM_STYPE_OPA_GRP_TAG   0x0f    /* BGP Group Policy Class Tag Extended Community [Dhananjaya_Rao] */

#define BGP_EXT_COM_STYPE_OPA_HSH_SRT   0x14    /* Consistent Hash Sort Order [draft-ietf-bess-service-chaining] */

#define BGP_EXT_COM_STYPE_OPA_GRP_PID   0x17    /* Group Policy ID Extended Community [draft-wlin-bess-group-policy-id-extended-community] */

#define BGP_EXT_COM_STYPE_OPA_LCM       0x1b    /* Local Color Mapping (LCM) [draft-ietf-idr-bgp-car-05] */

#define BGP_EXT_COM_STYPE_OPA_LOADBAL   0xaa    /* LoadBalance [draft-ietf-bess-service-chaining] */

/* BGP Cost Community Point of Insertion Types */

#define BGP_EXT_COM_COST_POI_ORIGIN     1       /* Evaluate after "Prefer lowest Origin" step */

#define BGP_EXT_COM_COST_POI_ASPATH     2       /* Evaluate after "Prefer shortest AS_PATH" step */

#define BGP_EXT_COM_COST_POI_MED        4       /* Evaluate after "Prefer lowest MED" step */

#define BGP_EXT_COM_COST_POI_LP         5       /* Evaluate after "Prefer highest Local Preference" step */

#define BGP_EXT_COM_COST_POI_AIGP       26      /* Evaluate after "Prefer lowest Accumulated IGP Cost" step */

#define BGP_EXT_COM_COST_POI_ABS        128     /* Pre-bestpath POI */

#define BGP_EXT_COM_COST_POI_IGP        129     /* Evaluate after "Prefer smallest IGP metric to next-hop" step */

#define BGP_EXT_COM_COST_POI_EI         130     /* Evaluate after "Prefer eBGP to iBGP" step */

#define BGP_EXT_COM_COST_POI_RID        131     /* Evaluate after "Prefer lowest BGP RID" step */

#define BGP_EXT_COM_COST_CID_REP        0x80    /* Bitmask - value replace/evaluate after bit */

/* BGP Tunnel Encapsulation Attribute Tunnel Types */

#define BGP_EXT_COM_TUNNEL_RESERVED     0       /* Reserved [RFC5512] */

#define BGP_EXT_COM_TUNNEL_L2TPV3       1       /* L2TPv3 over IP [RFC5512] */

#define BGP_EXT_COM_TUNNEL_GRE          2       /* GRE [RFC5512] */

#define BGP_EXT_COM_TUNNEL_ENDP         3       /* Transmit tunnel endpoint [RFC5566] */

#define BGP_EXT_COM_TUNNEL_IPSEC        4       /* IPsec in Tunnel-mode [RFC5566] */

#define BGP_EXT_COM_TUNNEL_IPIPSEC      5       /* IP in IP tunnel with IPsec Transport Mode [RFC5566] */

#define BGP_EXT_COM_TUNNEL_MPLSIP       6       /* MPLS-in-IP tunnel with IPsec Transport Mode [RFC5566] */

#define BGP_EXT_COM_TUNNEL_IPIP         7       /* IP in IP [RFC5512] */

#define BGP_EXT_COM_TUNNEL_VXLAN        8       /* VXLAN Encapsulation [draft-sd-l2vpn-evpn-overlay] */

#define BGP_EXT_COM_TUNNEL_NVGRE        9       /* NVGRE Encapsulation [draft-sd-l2vpn-evpn-overlay] */

#define BGP_EXT_COM_TUNNEL_MPLS         10      /* MPLS Encapsulation [draft-sd-l2vpn-evpn-overlay] */

#define BGP_EXT_COM_TUNNEL_MPLSGRE      11      /* MPLS in GRE Encapsulation [draft-sd-l2vpn-evpn-overlay] */

#define BGP_EXT_COM_TUNNEL_VXLANGPE     12      /* VxLAN GPE Encapsulation [draft-sd-l2vpn-evpn-overlay] */

#define BGP_EXT_COM_TUNNEL_MPLSUDP      13      /* MPLS in UDP Encapsulation [draft-ietf-l3vpn-end-system] */

#define BGP_EXT_COM_TUNNEL_IPV6_TUNNEL  14      /* IPv6 Tunnel  [Martin_Djernaes] */

#define BGP_EXT_COM_TUNNEL_SE_TE_POLICY 15      /* SR TE Policy Type [draft-ietf-idr-sr-policy-safi-04] */

#define BGP_EXT_COM_TUNNEL_BARE         16      /* Bare [Nischal_Sheth] */

#define BGP_EXT_COM_TUNNEL_SR_TUNNEL    17      /* SR Tunnel [RFC9125] */

#define BGP_EXT_COM_TUNNEL_CLOUD_SEC    18      /* Cloud Security [Ramesh_Babu_Yakkala] */

#define BGP_EXT_COM_TUNNEL_GENEVE_ENCAP 19      /* Geneve Encapsulation [RFC8926] */

#define BGP_EXT_COM_TUNNEL_ANY_ENCAP    20      /* Any Encapsulation [draft-ietf-bess-bgp-multicast-controller-06] */

#define BGP_EXT_COM_TUNNEL_GTP_TUNNEL   21      /* GTP Tunnel Type [Keyur_Patel][Tetsuya_Murakami] */

#define BGP_EXT_COM_TUNNEL_DPS_TUNNEL   22      /* Dynamic Path Selection (DPS) Tunnel Encapsulation [Venkit_Kasiviswanathan] */

#define BGP_EXT_COM_TUNNEL_OPE          23      /* Originating PE (OPE) [draft-heitz-bess-evpn-option-b-01] */

#define BGP_EXT_COM_TUNNEL_DYN_DPS_POL  24      /* Dynamic Path Selection (DPS) Policy [Sarah_Chen] */

#define BGP_EXT_COM_TUNNEL_SDWAN_HYB    25      /* SDWAN-Hybrid [draft-ietf-idr-sdwan-edge-discovery-04] */

#define BGP_EXT_COM_TUNNEL_X_OVER_UDP   26      /* X-over-UDP [Jeffrey_Haas] */

#define BGP_EXT_COM_TUNNEL_DES_ENCAP    27      /* Distributed Etherlink Switch (DES) Tunnel Encapsulation [David_Cronin] */

/* Non-Transitive Opaque Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_OPA_OR_VAL_ST 0x00    /* BGP Origin Validation State [draft-ietf-sidr-origin-validation-signaling] */

#define BGP_EXT_COM_STYPE_OPA_COST      0x01    /* Cost Community [draft-ietf-idr-custom-decision] */

#define BGP_EXT_COM_STYPE_OPA_RT        0x02    /* Route Target [Nischal_Sheth] */

#define BGP_EXT_COM_STYPE_OPA_RT_EC     0x15    /* RT-derived-EC [draft-zzhang-idr-rt-derived-community-00] */

/* Transitive MUP Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_MUP_DIRECT_SEG 0x00

/* BGP Generic Transitive Experimental Use Extended Community Sub-Types */

#define BGP_EXT_COM_STYPE_EXP_OSPF_RT   0x00    /* OSPF Route Type, deprecated [RFC4577] */

#define BGP_EXT_COM_STYPE_EXP_OSPF_RID  0x01    /* OSPF Router ID, deprecated [RFC4577] */

#define BGP_EXT_COM_STYPE_EXP_SEC_GROUP 0x04    /* Security Group [https://github.com/Juniper/contrail-controller/wiki/BGP-Extended-Communities#security-group] */

#define BGP_EXT_COM_STYPE_EXP_OSPF_DID  0x05    /* OSPF Domain ID, deprecated [RFC4577] */

#define BGP_EXT_COM_STYPE_EXP_F_TR      0x06    /* Flow spec traffic-rate [RFC5575] */

#define BGP_EXT_COM_STYPE_EXP_F_TA      0x07    /* Flow spec traffic-action [RFC5575] */

#define BGP_EXT_COM_STYPE_EXP_F_RED     0x08    /* Flow spec redirect [RFC5575] */

#define BGP_EXT_COM_STYPE_EXP_F_RMARK   0x09    /* Flow spec traffic-remarking [RFC5575] */

#define BGP_EXT_COM_STYPE_EXP_L2        0x0a    /* Layer2 Info Extended Community [RFC4761] */

#define BGP_EXT_COM_STYPE_EXP_ETREE     0x0b    /* E-Tree Info [RFC7796] */

#define BGP_EXT_COM_STYPE_EXP_FLOW_RATE 0x0c    /* Flow spec traffic-rate-packets [RFC8955] */

#define BGP_EXT_COM_STYPE_EXP_FLOW_SFC  0x0d    /* Flow Specification for SFC Classifiers [RFC9015] */

#define BGP_EXT_COM_STYPE_EXP_TAG       0x84    /* Tag [https://github.com/Juniper/contrail-controller/wiki/BGP-Extended-Communities#tag] */

#define BGP_EXT_COM_STYPE_EXP_SUB_CLUS  0x85    /* Origin Sub-Cluster [https://github.com/robric/wiki-contrail-controller/blob/master/BGP-Extended-Communities.md] */

/* BGP Generic Transitive Experimental Use Extended Community Part 2 */

#define BGP_EXT_COM_STYPE_EXP_2_FLOW_RED 0x08

/* BGP Generic Transitive Experimental Use Extended Community Part 3 */

#define BGP_EXT_COM_STYPE_EXP_3_SEC_GROUP 0x04

#define BGP_EXT_COM_STYPE_EXP_3_FLOW_RED  0x08

#define BGP_EXT_COM_STYPE_EXP_3_TAG4      0x84

#define BGP_EXT_COM_STYPE_EXP_3_SUB_CLUS  0x85

/* BGP Transitive Experimental EIGRP route attribute Sub-Types */

#define BGP_EXT_COM_STYPE_EXP_EIGRP_FT  0x00    /* Route Flags, Route Tag */

#define BGP_EXT_COM_STYPE_EXP_EIGRP_AD  0x01    /* ASN, Delay */

#define BGP_EXT_COM_STYPE_EXP_EIGRP_RHB 0x02    /* Reliability, Hop Count, Bandwidth */

#define BGP_EXT_COM_STYPE_EXP_EIGRP_LM  0x03    /* Load, MTU */

#define BGP_EXT_COM_STYPE_EXP_EIGRP_EAR 0x04    /* External ASN, RID of the redistributing router */

#define BGP_EXT_COM_STYPE_EXP_EIGRP_EPM 0x05    /* External Protocol ID, metric */

#define BGP_EXT_COM_STYPE_EXP_EIGRP_RID 0x06    /* Originating EIGRP Router ID of the route */

#define BGP_EXT_COM_EXP_EIGRP_FLAG_RT   0x8000  /* Route flag - Internal/External */

/* according to IANA's number assignment at: http://www.iana.org/assignments/bgp-extended-communities */

                                        /* RFC 4360 */

#define BGP_EXT_COM_RT_AS2        0x0002  /* Route Target,Format AS(2bytes):AN(4bytes) */

#define BGP_EXT_COM_RT_IP4        0x0102  /* Route Target,Format IP address:AN(2bytes) */

#define BGP_EXT_COM_RT_AS4        0x0202  /* Route Target,Format AS(4bytes):AN(2bytes) */

/* extended community option flow flec action bit S and T */

#define BGP_EXT_COM_FSPEC_ACT_S 0x02

#define BGP_EXT_COM_FSPEC_ACT_T 0x01

/* extended community l2vpn flags */

#define BGP_EXT_COM_L2_FLAG_D     0x80

#define BGP_EXT_COM_L2_FLAG_Z1    0x40

#define BGP_EXT_COM_L2_FLAG_F     0x20

#define BGP_EXT_COM_L2_FLAG_Z345  0x1c

#define BGP_EXT_COM_L2_FLAG_C     0x02

#define BGP_EXT_COM_L2_FLAG_S     0x01

/* extended community E-Tree Info flags */

#define BGP_EXT_COM_ETREE_FLAG_RESERVED   0xFFFC

#define BGP_EXT_COM_ETREE_FLAG_P          0x0002

#define BGP_EXT_COM_ETREE_FLAG_V          0x0001

/* Extended community QoS Marking technology type */

#define QOS_TECH_TYPE_DSCP         0x00  /* DiffServ enabled IP (DSCP encoding) */

#define QOS_TECH_TYPE_802_1q       0x01  /* Ethernet using 802.1q priority tag */

#define QOS_TECH_TYPE_E_LSP        0x02  /* MPLS using E-LSP */

#define QOS_TECH_TYPE_VC           0x03  /* Virtual Channel (VC) encoding using separate channels for */

                                         /* QoS forwarding / one channel per class (e.g. ATM VCs, FR  */

                                         /* VCs, MPLS L-LSPs) */

#define QOS_TECH_TYPE_GMPLS_TIME   0x04   /* GMPLS - time slot encoding */

#define QOS_TECH_TYPE_GMPLS_LAMBDA 0x05  /* GMPLS - lambda encoding */

#define QOS_TECH_TYPE_GMPLS_FIBRE  0x06  /* GMPLS - fibre encoding */

/* OSPF codes for  BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls  */

#define BGP_OSPF_RTYPE_RTR      1 /* OSPF Router LSA */

#define BGP_OSPF_RTYPE_NET      2 /* OSPF Network LSA */

#define BGP_OSPF_RTYPE_SUM      3 /* OSPF Summary LSA */

#define BGP_OSPF_RTYPE_EXT      5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */

#define BGP_OSPF_RTYPE_NSSA     7 /* OSPF NSSA External*/

#define BGP_OSPF_RTYPE_SHAM     129 /* OSPF-MPLS-VPN Sham link */

#define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* Type-1 (clear) or Type-2 (set) external metric */

/* Extended community & Route distinguisher formats */

#define FORMAT_AS2_LOC      0x00    /* Format AS(2bytes):AN(4bytes) */

#define FORMAT_IP_LOC       0x01    /* Format IP address:AN(2bytes) */

#define FORMAT_AS4_LOC      0x02    /* Format AS(4bytes):AN(2bytes) */

/* RFC 4760 subsequent address family numbers (last updated 2024-03-19)

 * https://www.iana.org/assignments/safi-namespace/safi-namespace.xhtml

 */

#define SAFNUM_UNICAST          1  /* RFC4760 */

#define SAFNUM_MULCAST          2  /* RFC4760 */

#define SAFNUM_UNIMULC          3  /* Deprecated, see RFC4760 */

#define SAFNUM_MPLS_LABEL       4  /* RFC8277 */

#define SAFNUM_MCAST_VPN        5  /* RFC6514 */

#define SAFNUM_MULTISEG_PW      6  /* RFC7267 */

#define SAFNUM_ENCAPSULATION    7  /* RFC5512, obsolete and never deployed, see draft-ietf-idr-tunnel-encaps-22 */

#define SAFNUM_MCAST_VPLS       8  /* RFC7117 */

#define SAFNUM_BGP_SFC          9  /* RFC9015 */

#define SAFNUM_TUNNEL          64  /* draft-nalawade-kapoor-tunnel-safi-05.txt (Expired) */

#define SAFNUM_VPLS            65  /* RFC4761, RFC6074 */

#define SAFNUM_MDT             66  /* RFC6037 */

#define SAFNUM_4OVER6          67  /* RFC5747 */

#define SAFNUM_6OVER4          68  /* Never specified? Cf. RFC5747 */

#define SAFNUM_L1VPN           69  /* RFC5195 */

#define SAFNUM_EVPN            70  /* RFC7432 */

#define SAFNUM_BGP_LS          71  /* RFC7752 */

#define SAFNUM_BGP_LS_VPN      72  /* RFC7752 */

#define SAFNUM_SR_POLICY       73  /* draft-ietf-idr-segment-routing-te-policy-11 */

#define SAFNUM_SD_WAN          74  /* draft-dunbar-idr-sdwan-port-safi-06, expired */

#define SAFNUM_RPD             75  /* draft-ietf-idr-rpd-10 */

#define SAFNUM_CT              76  /* draft-kaliraj-idr-bgp-classful-transport-planes-07 */

#define SAFNUM_FLOWSPEC        77  /* draft-ietf-idr-flowspec-nvo3-13 */

#define SAFNUM_MCAST_TREE      78  /* draft-ietf-bess-bgp-multicast-03 */

#define SAFNUM_BGP_DPS         79  /* https://www.arista.com/en/cg-veos-router/veos-router-dynamic-path-selection */

#define SAFNUM_BGP_LS_SPF      80  /* draft-ietf-lsvr-bgp-spf-15 */

#define SAFNUM_BGP_CAR         83  /* draft-ietf-idr-bgp-car-05 */

#define SAFNUM_BGP_VPN_CAR     84  /* draft-ietf-idr-bgp-car-05 */

#define SAFNUM_BGP_MUP         85  /* draft-mpmz-bess-mup-safi-03 */

#define SAFNUM_LAB_VPNUNICAST 128  /* RFC4364, RFC8277 */

#define SAFNUM_LAB_VPNMULCAST 129  /* RFC6513, RFC6514 */

#define SAFNUM_LAB_VPNUNIMULC 130  /* Obsolete and reserved, see RFC4760 */

#define SAFNUM_ROUTE_TARGET   132  /* RFC 4684 Constrained Route Distribution for BGP/MPLS IP VPN */

#define SAFNUM_FSPEC_RULE     133  /* RFC 8955 BGP flow spec SAFI */

#define SAFNUM_FSPEC_VPN_RULE 134  /* RFC 8955 BGP flow spec SAFI VPN */

#define SAFNUM_L3VPN          140  /* Withdrawn, draft-ietf-l3vpn-bgpvpn-auto-09 */

/* BGP Additional Paths Capability */

#define BGP_ADDPATH_RECEIVE  0x01

#define BGP_ADDPATH_SEND     0x02

/* mcast-vpn route types RFC 6514 */

#define MCAST_VPN_RTYPE_INTRA_AS_IPMSI_AD 1

#define MCAST_VPN_RTYPE_INTER_AS_IPMSI_AD 2

#define MCAST_VPN_RTYPE_SPMSI_AD          3

#define MCAST_VPN_RTYPE_LEAF_AD           4

#define MCAST_VPN_RTYPE_SOURCE_ACTIVE_AD  5

#define MCAST_VPN_RTYPE_SHARED_TREE_JOIN  6

#define MCAST_VPN_RTYPE_SOURCE_TREE_JOIN  7

/* RFC 5512 Tunnel Types */

#define TUNNEL_TYPE_L2TP_OVER_IP      1

#define TUNNEL_TYPE_GRE               2

#define TUNNEL_TYPE_TTE               3

#define TUNNEL_TYPE_IPSEC_IN_TM       4

#define TUNNEL_TYPE_IP_IN_IP_IPSEC    5

#define TUNNEL_TYPE_MPLS_IN_IP_IPSEC  6

#define TUNNEL_TYPE_IP_IN_IP          7

#define TUNNEL_TYPE_VXLAN             8

#define TUNNEL_TYPE_NVGRE             9

#define TUNNEL_TYPE_MPLS             10

#define TUNNEL_TYPE_MPLS_IN_GRE      11

#define TUNNEL_TYPE_VXLAN_GPE        12

#define TUNNEL_TYPE_MPLS_IN_UDP      13

#define TUNNEL_TYPE_IPV6_TUNNEL      14

#define TUNNEL_TYPE_SR_TE_POLICY     15

#define TUNNEL_TYPE_BARE             16

#define TUNNEL_TYPE_SR_TUNNEL        17

#define TUNNEL_TYPE_CLOUD_SECURITY   18

#define TUNNEL_TYPE_GENEVE_ENCAP     19

#define TUNNEL_TYPE_ANY_ENCAP        20

#define TUNNEL_TYPE_GTP_TUNNEL_TYPE  21

#define TUNNEL_TYPE_DPS_TUNNEL_ENCAP 22

#define TUNNEL_TYPE_ORIGINATING_PE   23

#define TUNNEL_TYPE_DPS_POLICY       24

#define TUNNEL_TYPE_SDWAN_HYBRID     25

#define TUNNEL_TYPE_X_OVER_UDP       26

#define TUNNEL_TYPE_DES_TUNNEL_ENCAP 27

/*RFC 6514 PMSI Tunnel Types */

#define PMSI_TUNNEL_NOPRESENT           0

#define PMSI_TUNNEL_RSVPTE_P2MP         1

#define PMSI_TUNNEL_MLDP_P2MP           2

#define PMSI_TUNNEL_PIMSSM              3

#define PMSI_TUNNEL_PIMSM               4

#define PMSI_TUNNEL_BIDIR_PIM           5

#define PMSI_TUNNEL_INGRESS             6

#define PMSI_TUNNEL_MLDP_MP2MP          7

#define PMSI_TUNNEL_TRANPORT            8

#define PMSI_TUNNEL_ASS_REPLIC          9

#define PMSI_TUNNEL_BIER                11

#define PMSI_TUNNEL_SR_MPLS_P2MP        12

/* RFC 6388, RFC 6826, RFC 6512, RFC 7246, RFC 7442, RFC 8338 */

#define PMSI_MLDP_FEC_TYPE_RSVD                     0

#define PMSI_MLDP_FEC_TYPE_GEN_LSP                  1

#define PMSI_MLDP_FEC_TYPE_TRANSIT_IPV4_SRC         3

#define PMSI_MLDP_FEC_TYPE_TRANSIT_IPV6_SRC         4

#define PMSI_MLDP_FEC_TYPE_TRANSIT_IPV4_BIDIR       5

#define PMSI_MLDP_FEC_TYPE_TRANSIT_IPV6_BIDIR       6

#define PMSI_MLDP_FEC_TYPE_RECURSE_OPAQUE_VALUE     7

#define PMSI_MLDP_FEC_TYPE_VPN_RECURSE_OPAQUE_VALUE 8

#define PMSI_MLDP_FEC_TYPE_TRANSIT_VPNV4_BIDIR      9

#define PMSI_MLDP_FEC_TYPE_TRANSIT_VPNV6_BIDIR      10

#define PMSI_MLDP_FEC_TYPE_TRANSIT_IPV4_SHARED_TREE 11

#define PMSI_MLDP_FEC_TYPE_TRANSIT_IPV6_SHARED_TREE 12

#define PMSI_MLDP_FEC_TYPE_L2VPN_MCAST              13

#define PMSI_MLDP_FEC_TYPE_TRANSIT_VPNV4_SRC        250

#define PMSI_MLDP_FEC_TYPE_TRANSIT_VPNV6_SRC        251

#define PMSI_MLDP_FEC_TYPE_EXT_TYPE                 255

#define PMSI_MLDP_FEC_ETYPE_RSVD                    0

/* RFC 7311 AIGP types */

#define AIGP_TLV_TYPE           1

/* RFC 9012 (RFC 5512/5640) Sub-TLV Types */

#define TUNNEL_SUBTLV_ENCAPSULATION     1

#define TUNNEL_SUBTLV_PROTO_TYPE        2

#define TUNNEL_SUBTLV_IPSEC_TA          3

#define TUNNEL_SUBTLV_COLOR             4

#define TUNNEL_SUBTLV_LOAD_BALANCE      5

#define TUNNEL_SUBTLV_REMOTE_ENDPOINT   6

#define TUNNEL_SUBTLV_IPV4_DS_FIELD     7

#define TUNNEL_SUBTLV_UDP_DST_PORT      8

#define TUNNEL_SUBTLV_EMBEDDED_LABEL    9

#define TUNNEL_SUBTLV_MPLS_LABEL        10

#define TUNNEL_SUBTLV_PREFIX_SID        11

#define TUNNEL_SUBTLV_PREFERENCE        12

#define TUNNEL_SUBTLV_BINDING_SID       13

#define TUNNEL_SUBTLV_ENLP              14

#define TUNNEL_SUBTLV_PRIORITY          15

#define TUNNEL_SUBTLV_SPI_SI_REP        16

#define TUNNEL_SUBTLV_SRV6_BINDING_SID  20

#define TUNNEL_SUBTLV_IPSEC_SA_ID       64

#define TUNNEL_SUBTLV_EXT_PORT_PROP     65

#define TUNNEL_SUBTLV_UNDERLAY_ISP_PROP 66

#define TUNNEL_SUBTLV_IPSEC_SA_NONCE    67

#define TUNNEL_SUBTLV_IPSEC_PUBLIC_KEY  68

#define TUNNEL_SUBTLV_IPSEC_SA_PROPOSAL 69

#define TUNNEL_SUBTLV_SIMPL_IPSEC_SA    70

#define TUNNEL_SUBTLV_NRP               123

#define TUNNEL_SUBTLV_RPF               124

#define TUNNEL_SUBTLV_TREE_LABEL_STACK  125

#define TUNNEL_SUBTLV_SEGMENT_LIST      128

#define TUNNEL_SUBTLV_POLICY_CP_NAME    129

#define TUNNEL_SUBTLV_POLICY_NAME       130

#define TUNNEL_SUBTLV_WAN_ID            192

#define TUNNEL_SUBTLV_BYTES             193

#define TUNNEL_SUBTLV_IPSEC_DIM         194

#define TUNNEL_SUBTLV_IPSEC_KEY_EXCH    195

#define TUNNEL_SUBTLV_IPSEC_SA_PROPS    196

#define TUNNEL_SUBTLV_SRV_SEGMENT_LIST  197

#define TUNNEL_SUBTLV_SRV_VTEP          198

#define TUNNEL_SUBTLV_DES_ADJACENCY     199

/* BGP Tunnel SubTLV VXLAN Flags bitmask */

#define TUNNEL_SUBTLV_VXLAN_VALID_VNID          0x80

#define TUNNEL_SUBTLV_VXLAN_VALID_MAC           0x40

#define TUNNEL_SUBTLV_VXLAN_RESERVED            0x3F

/* BGP Tunnel SubTLV VXLAN GPE Flags bitmask */

#define TUNNEL_SUBTLV_VXLAN_GPE_VERSION         0xC0

#define TUNNEL_SUBTLV_VXLAN_GPE_VALID_VNID      0x20

#define TUNNEL_SUBTLV_VXLAN_GPE_RESERVED        0x1F

/* BGP Tunnel SubTLV NVGRE Flags bitmask */

#define TUNNEL_SUBTLV_NVGRE_VALID_VNID          0x80

#define TUNNEL_SUBTLV_NVGRE_VALID_MAC           0x40

#define TUNNEL_SUBTLV_NVGRE_RESERVED            0x3F

/* BGP Tunnel SubTLV Binding SID Flags bitmask */

#define TUNNEL_SUBTLV_BINDING_SPECIFIED         0x80

#define TUNNEL_SUBTLV_BINDING_INVALID           0x40

#define TUNNEL_SUBTLV_BINDING_RESERVED          0x3F

/* BGP Segment List SubTLV Types */

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_TYPE_A   1

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_TYPE_B   2

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_TYPE_C   3

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_TYPE_D   4

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_TYPE_E   5

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_TYPE_F   6

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_TYPE_G   7

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_TYPE_H   8

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_TYPE_WEIGHT   9

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_TYPE_I   10

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_TYPE_J   11

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_TYPE_K   12

/* BGP Tunnel SubTLV Segment List SubTLV Flags bitmask */

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_VERIFICATION      0x80

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_ALGORITHM         0x40

#define TUNNEL_SUBTLV_SEGMENT_LIST_SUB_RESERVED          0x3F

/* Link-State NLRI types */

#define LINK_STATE_NODE_NLRI                    1

#define LINK_STATE_LINK_NLRI                    2

#define LINK_STATE_IPV4_TOPOLOGY_PREFIX_NLRI    3

#define LINK_STATE_IPV6_TOPOLOGY_PREFIX_NLRI    4

#define LINK_STATE_SR_POLICY_CANDIDATE_PATH     5

#define LINK_STATE_SRV6_SID_NLRI                6

#define LINK_STATE_STUB_LINK_NLRI               7

/* Link-State NLRI Protocol-ID values */

#define BGP_LS_NLRI_PROTO_ID_UNKNOWN       0

#define BGP_LS_NLRI_PROTO_ID_IS_IS_LEVEL_1 1

#define BGP_LS_NLRI_PROTO_ID_IS_IS_LEVEL_2 2

#define BGP_LS_NLRI_PROTO_ID_OSPF_V2       3

#define BGP_LS_NLRI_PROTO_ID_DIRECT        4

#define BGP_LS_NLRI_PROTO_ID_STATIC        5

#define BGP_LS_NLRI_PROTO_ID_OSPF_V3       6

#define BGP_LS_NLRI_PROTO_ID_BGP           7

#define BGP_LS_NLRI_PROTO_ID_RSVP_TE       8

#define BGP_LS_NLRI_PROTO_ID_SEGMENT_ROUTING 9

/* Link-State routing universes */

#define BGP_LS_NLRI_ROUTING_UNIVERSE_LEVEL_3     0

#define BGP_LS_NLRI_ROUTING_UNIVERSE_LEVEL_1     1

#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_UNKNOWN    0

#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_INTRA_AREA 1

#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_INTER_AREA 2

#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_EXTERNAL_1 3

#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_EXTERNAL_2 4

#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_NSSA_1     5

#define BGP_LS_PREFIX_OSPF_ROUTE_TYPE_NSSA_2     6

/* RFC7752 */

#define BGP_NLRI_TLV_LOCAL_NODE_DESCRIPTORS         256

#define BGP_NLRI_TLV_REMOTE_NODE_DESCRIPTORS        257

#define BGP_NLRI_TLV_LINK_LOCAL_REMOTE_IDENTIFIERS  258

#define BGP_NLRI_TLV_IPV4_INTERFACE_ADDRESS         259

#define BGP_NLRI_TLV_IPV4_NEIGHBOR_ADDRESS          260

#define BGP_NLRI_TLV_IPV6_INTERFACE_ADDRESS         261

#define BGP_NLRI_TLV_IPV6_NEIGHBOR_ADDRESS          262

#define BGP_NLRI_TLV_MULTI_TOPOLOGY_ID              263

#define BGP_NLRI_TLV_OSPF_ROUTE_TYPE                264

#define BGP_NLRI_TLV_IP_REACHABILITY_INFORMATION    265

#define BGP_NLRI_TLV_NODE_MSD                       266

#define BGP_NLRI_TLV_LINK_MSD                       267

#define BGP_NLRI_TLV_AUTONOMOUS_SYSTEM              512

#define BGP_NLRI_TLV_BGP_LS_IDENTIFIER              513

#define BGP_NLRI_TLV_AREA_ID                        514

#define BGP_NLRI_TLV_IGP_ROUTER_ID                  515

#define BGP_NLRI_TLV_BGP_ROUTER_ID                  516

#define BGP_NLRI_TLV_BGP_CONFEDERATION_MEMBER       517

#define BGP_NLRI_TLV_SRV6_SID_INFO                  518

#define BGP_NLRI_TLV_NODE_FLAG_BITS                 1024

#define BGP_NLRI_TLV_OPAQUE_NODE_PROPERTIES         1025

#define BGP_NLRI_TLV_NODE_NAME                      1026

#define BGP_NLRI_TLV_IS_IS_AREA_IDENTIFIER          1027

#define BGP_NLRI_TLV_IPV4_ROUTER_ID_OF_LOCAL_NODE   1028

#define BGP_NLRI_TLV_IPV6_ROUTER_ID_OF_LOCAL_NODE   1029

#define BGP_NLRI_TLV_IPV4_ROUTER_ID_OF_REMOTE_NODE  1030

#define BGP_NLRI_TLV_IPV6_ROUTER_ID_OF_REMOTE_NODE  1031

#define BGP_NLRI_TLV_ADMINISTRATIVE_GROUP_COLOR     1088

#define BGP_NLRI_TLV_MAX_LINK_BANDWIDTH             1089

#define BGP_NLRI_TLV_MAX_RESERVABLE_LINK_BANDWIDTH  1090

#define BGP_NLRI_TLV_UNRESERVED_BANDWIDTH           1091

#define BGP_NLRI_TLV_TE_DEFAULT_METRIC              1092

#define BGP_NLRI_TLV_LINK_PROTECTION_TYPE           1093

#define BGP_NLRI_TLV_MPLS_PROTOCOL_MASK             1094

#define BGP_NLRI_TLV_METRIC                         1095

#define BGP_NLRI_TLV_SHARED_RISK_LINK_GROUP         1096

#define BGP_NLRI_TLV_OPAQUE_LINK_ATTRIBUTE          1097

#define BGP_NLRI_TLV_LINK_NAME_ATTRIBUTE            1098

#define BGP_NLRI_TLV_IGP_FLAGS                      1152

#define BGP_NLRI_TLV_ROUTE_TAG                      1153

#define BGP_NLRI_TLV_EXTENDED_TAG                   1154

#define BGP_NLRI_TLV_PREFIX_METRIC                  1155

#define BGP_NLRI_TLV_OSPF_FORWARDING_ADDRESS        1156

#define BGP_NLRI_TLV_OPAQUE_PREFIX_ATTRIBUTE        1157

#define BGP_NLRI_TLV_EXTENDED_ADMINISTRATIVE_GROUP  1173

/* Link-State NLRI TLV lengths */

#define BGP_NLRI_TLV_LEN_AUTONOMOUS_SYSTEM              4

#define BGP_NLRI_TLV_LEN_BGP_LS_IDENTIFIER              4

#define BGP_NLRI_TLV_LEN_AREA_ID                        4

#define BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID                 4

#define BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID                 16

#define BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_LOCAL_NODE   BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID

#define BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_LOCAL_NODE   BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID

#define BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID_OF_REMOTE_NODE  BGP_NLRI_TLV_LEN_IPV4_ROUTER_ID

#define BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID_OF_REMOTE_NODE  BGP_NLRI_TLV_LEN_IPV6_ROUTER_ID

#define BGP_NLRI_TLV_LEN_LINK_LOCAL_REMOTE_IDENTIFIERS  8

#define BGP_NLRI_TLV_LEN_IPV4_INTERFACE_ADDRESS         4

#define BGP_NLRI_TLV_LEN_IPV4_NEIGHBOR_ADDRESS          4

#define BGP_NLRI_TLV_LEN_IPV6_INTERFACE_ADDRESS         16

#define BGP_NLRI_TLV_LEN_IPV6_NEIGHBOR_ADDRESS          16

#define BGP_NLRI_TLV_LEN_MULTI_TOPOLOGY_ID              2

#define BGP_NLRI_TLV_LEN_ADMINISTRATIVE_GROUP_COLOR     4

#define BGP_NLRI_TLV_LEN_MAX_LINK_BANDWIDTH             4

#define BGP_NLRI_TLV_LEN_MAX_RESERVABLE_LINK_BANDWIDTH  4

#define BGP_NLRI_TLV_LEN_UNRESERVED_BANDWIDTH           32

#define BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC_OLD          3

#define BGP_NLRI_TLV_LEN_TE_DEFAULT_METRIC_NEW          4

#define BGP_NLRI_TLV_LEN_LINK_PROTECTION_TYPE           2

#define BGP_NLRI_TLV_LEN_MPLS_PROTOCOL_MASK             1

#define BGP_NLRI_TLV_LEN_MAX_METRIC                     3

#define BGP_NLRI_TLV_LEN_IGP_FLAGS                      1

#define BGP_NLRI_TLV_LEN_PREFIX_METRIC                  4

#define BGP_NLRI_TLV_LEN_NODE_FLAG_BITS                 1

/* rfc9085 */

/* draft-ietf-idr-bgpls-srv6-ext-14 */

#define BGP_LS_SR_TLV_SR_CAPABILITY                 1034

#define BGP_LS_SR_TLV_SR_ALGORITHM                  1035

#define BGP_LS_SR_TLV_SR_LOCAL_BLOCK                1036

#define BGP_LS_SR_TLV_SRV6_CAPABILITY               1038

#define BGP_LS_SR_TLV_FLEX_ALGO_DEF                 1039

#define BGP_LS_SR_TLV_FLEX_ALGO_EXC_ANY_AFFINITY    1040

#define BGP_LS_SR_TLV_FLEX_ALGO_INC_ANY_AFFINITY    1041

#define BGP_LS_SR_TLV_FLEX_ALGO_INC_ALL_AFFINITY    1042

#define BGP_LS_SR_TLV_FLEX_ALGO_DEF_FLAGS           1043

#define BGP_LS_SR_TLV_FLEX_ALGO_PREFIX_METRIC       1044

#define BGP_LS_SR_TLV_FLEX_ALGO_EXC_SRLG            1045

#define BGP_LS_SR_TLV_ADJ_SID                       1099

#define BGP_LS_SR_TLV_LAN_ADJ_SID                   1100

#define BGP_LS_SR_TLV_PEER_NODE_SID                 1101

#define BGP_LS_SR_TLV_PEER_ADJ_SID                  1102

#define BGP_LS_SR_TLV_PEER_SET_SID                  1103

#define BGP_LS_SR_TLV_SRV6_END_X_SID                1106

#define BGP_LS_SR_TLV_SRV6_LAN_END_X_SID            1107

#define BGP_LS_SR_TLV_PREFIX_SID                    1158

#define BGP_LS_SR_TLV_RANGE                         1159

#define BGP_LS_SR_TLV_SRV6_LOCATOR                  1162

#define BGP_LS_SR_TLV_PREFIX_ATTR_FLAGS             1170

#define BGP_LS_SR_TLV_SOURCE_ROUTER_ID              1171

#define BGP_LS_SR_TLV_SRV6_ENDPOINT_BEHAVIOR        1250

#define BGP_LS_SR_TLV_SRV6_SID_STRUCT               1252

/* RFC8571 BGP-LS Advertisement of IGP TE Metric Extensions */

#define BGP_LS_IGP_TE_METRIC_DELAY                  1114

#define BGP_LS_IGP_TE_METRIC_DELAY_MIN_MAX          1115

#define BGP_LS_IGP_TE_METRIC_DELAY_VARIATION        1116

#define BGP_LS_IGP_TE_METRIC_LOSS                   1117

#define BGP_LS_IGP_TE_METRIC_BANDWIDTH_RESIDUAL     1118

#define BGP_LS_IGP_TE_METRIC_BANDWIDTH_AVAILABLE    1119

#define BGP_LS_IGP_TE_METRIC_BANDWIDTH_UTILIZED     1120

#define BGP_LS_IGP_TE_METRIC_FLAG_A                 0x80

#define BGP_LS_IGP_TE_METRIC_FLAG_RESERVED          0x7F

/* draft-ietf-idr-bgp-ls-app-specific-attr-07 */

#define BGP_LS_APP_SPEC_LINK_ATTR                   1122

/* Prefix-SID TLV flags, draft-gredler-idr-bgp-ls-segment-routing-ext, RFC 8665-8667:

                             0  1  2  3  4  5  6  7

                            +--+--+--+--+--+--+--+--+

   if Protocol-ID is IS-IS  |R |N |P |E |V |L |  |  |

                            +--+--+--+--+--+--+--+--+

                             0  1  2  3  4  5  6  7

                            +--+--+--+--+--+--+--+--+

   if Protocol-ID is OSPF   |  |NP|M |E |V |L |  |  |

                            +--+--+--+--+--+--+--+--+

*/

#define BGP_LS_SR_PREFIX_SID_FLAG_R  0x80

#define BGP_LS_SR_PREFIX_SID_FLAG_N  0x40

#define BGP_LS_SR_PREFIX_SID_FLAG_NP 0x40

#define BGP_LS_SR_PREFIX_SID_FLAG_P  0x20

#define BGP_LS_SR_PREFIX_SID_FLAG_M  0x20

#define BGP_LS_SR_PREFIX_SID_FLAG_E  0x10

#define BGP_LS_SR_PREFIX_SID_FLAG_V  0x08

#define BGP_LS_SR_PREFIX_SID_FLAG_L  0x04

/* Adjacency-SID TLV flags, draft-gredler-idr-bgp-ls-segment-routing-ext, RFC 8665-8667:

                             0  1  2  3  4  5  6  7

                            +--+--+--+--+--+--+--+--+

   if Protocol-ID is IS-IS  |F |B |V |L |S |P |  |  |

                            +--+--+--+--+--+--+--+--+

                             0  1  2  3  4  5  6  7

                            +--+--+--+--+--+--+--+--+

   if Protocol-ID is OSPF   |B |V |L |G |P |  |  |  |

                            +--+--+--+--+--+--+--+--+

*/

#define BGP_LS_SR_ADJACENCY_SID_FLAG_FI 0x80

#define BGP_LS_SR_ADJACENCY_SID_FLAG_BO 0x80

#define BGP_LS_SR_ADJACENCY_SID_FLAG_BI 0x40

#define BGP_LS_SR_ADJACENCY_SID_FLAG_VO 0x40

#define BGP_LS_SR_ADJACENCY_SID_FLAG_VI 0x20

#define BGP_LS_SR_ADJACENCY_SID_FLAG_LO 0x20

#define BGP_LS_SR_ADJACENCY_SID_FLAG_LI 0x10

#define BGP_LS_SR_ADJACENCY_SID_FLAG_GO 0x10

#define BGP_LS_SR_ADJACENCY_SID_FLAG_SI 0x08

#define BGP_LS_SR_ADJACENCY_SID_FLAG_PO 0x08

#define BGP_LS_SR_ADJACENCY_SID_FLAG_PI 0x04

/* BGP Peering SIDs TLV flags, rfc9086:

   0  1  2  3  4  5  6  7

   +--+--+--+--+--+--+--+--+

   |V |L |B |P |  |  |  |  | rfc9086

   +--+--+--+--+--+--+--+--+

*/

#define BGP_LS_SR_PEER_SID_FLAG_V   0x80

#define BGP_LS_SR_PEER_SID_FLAG_L   0x40

#define BGP_LS_SR_PEER_SID_FLAG_B   0x20

#define BGP_LS_SR_PEER_SID_FLAG_P   0x10

/* SR-Capabilities TLV flags, draft-gredler-idr-bgp-ls-segment-routing-ext-01:

                             0  1  2  3  4  5  6  7

                            +--+--+--+--+--+--+--+--+