/* packet-lacp.c

 * Routines for Link Aggregation Control Protocol dissection.

 * IEEE Std 802.1AX-2014 Section 6.4.2.3

 *  Split from IEEE Std 802.3-2005 and named IEEE 802.3ad before that

 *

 * Copyright 2002 Steve Housley <steve_housley@3com.com>

 *

 * Wireshark - Network traffic analyzer

 * By Gerald Combs <gerald@wireshark.org>

 * Copyright 1998 Gerald Combs

 *

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

 */

#include "config.h"

#include <epan/etypes.h>

#include <epan/packet.h>

#include <epan/to_str.h>

#include <epan/expert.h>

#include <epan/tfs.h>

#include <wsutil/array.h>

#include "packet-slowprotocols.h"

/* General declarations */

void proto_register_lacp(void);

void proto_reg_handoff_lacp(void);

static dissector_handle_t lacp_handle;

#define VLACP_MAGIC_LACP 0x01010114

#define VLACP_MAGIC_MARKER 0x02010114

/* TLV Types */

#define LACPDU_TYPE_TERMINATOR      0x00

#define LACPDU_TYPE_ACTOR_INFORMATION   0x01

#define LACPDU_TYPE_PARTNER_INFORMATION   0x02

#define LACPDU_TYPE_COLLECTOR_INFORMATION 0x03

static const value_string lacp_type_vals[] = {

    { LACPDU_TYPE_TERMINATOR,     "Terminator" },

    { LACPDU_TYPE_ACTOR_INFORMATION,    "Actor Information" },

    { LACPDU_TYPE_PARTNER_INFORMATION,    "Partner Information" },

    { LACPDU_TYPE_COLLECTOR_INFORMATION,  "Collector Information" },

    { 0, NULL }

};

/* Actor and Partner Flag bits */

#define LACPDU_FLAGS_ACTIVITY           0x01

#define LACPDU_FLAGS_TIMEOUT            0x02

#define LACPDU_FLAGS_AGGREGATION        0x04

#define LACPDU_FLAGS_SYNC               0x08

#define LACPDU_FLAGS_COLLECTING         0x10

#define LACPDU_FLAGS_DISTRIB            0x20

#define LACPDU_FLAGS_DEFAULTED          0x40

#define LACPDU_FLAGS_EXPIRED            0x80

/* Initialise the protocol and registered fields */

static int proto_lacp;

static int hf_lacp_vlacp_subtype;

static int hf_lacp_version;

static int hf_lacp_tlv_type;

static int hf_lacp_tlv_length;

static int hf_lacp_actor_sysid_priority;

static int hf_lacp_actor_sysid;

static int hf_lacp_actor_key;

static int hf_lacp_actor_port_priority;

static int hf_lacp_actor_port;

static int hf_lacp_actor_state;

static int hf_lacp_actor_state_str;

static int hf_lacp_flags_a_activity;

static int hf_lacp_flags_a_timeout;

static int hf_lacp_flags_a_aggregation;

static int hf_lacp_flags_a_sync;

static int hf_lacp_flags_a_collecting;

static int hf_lacp_flags_a_distrib;

static int hf_lacp_flags_a_defaulted;

static int hf_lacp_flags_a_expired;

static int hf_lacp_actor_reserved;

static int hf_lacp_partner_sysid_priority;

static int hf_lacp_partner_sysid;

static int hf_lacp_partner_key;

static int hf_lacp_partner_port_priority;

static int hf_lacp_partner_port;

static int hf_lacp_partner_state;

static int hf_lacp_partner_state_str;

static int hf_lacp_flags_p_activity;

static int hf_lacp_flags_p_timeout;

static int hf_lacp_flags_p_aggregation;

static int hf_lacp_flags_p_sync;

static int hf_lacp_flags_p_collecting;

static int hf_lacp_flags_p_distrib;

static int hf_lacp_flags_p_defaulted;

static int hf_lacp_flags_p_expired;

static int hf_lacp_partner_reserved;

static int hf_lacp_coll_max_delay;

static int hf_lacp_coll_reserved;

static int hf_lacp_pad;

static int hf_lacp_vendor;

static int hf_lacp_vendor_hp_length;

static int hf_lacp_vendor_hp_irf_domain;

static int hf_lacp_vendor_hp_irf_mac;

static int hf_lacp_vendor_hp_irf_switch;

static int hf_lacp_vendor_hp_irf_port;

static int hf_lacp_vendor_hp_unknown;

/* Initialise the subtree pointers */

static int ett_lacp;

static int ett_lacp_a_flags;

static int ett_lacp_p_flags;

/* Expert Items */

static expert_field ei_lacp_wrong_tlv_type;

static expert_field ei_lacp_wrong_tlv_length;

static const true_false_string tfs_active_passive = { "Active", "Passive" };

static const true_false_string tfs_short_long_timeout = { "Short Timeout", "Long Timeout" };

static const true_false_string tfs_aggregatable_individual = { "Aggregatable", "Individual" };

static const true_false_string tfs_in_sync_out_sync = { "In Sync", "Out of Sync" };

static const char * lacp_state_flags_to_str(wmem_allocator_t *scope, uint32_t value)

{

    wmem_strbuf_t *buf = wmem_strbuf_new(scope, "");

    const unsigned int flags_count = 8;

    static const char first_letters[] = "EFDCSGSA";

    unsigned int i;

    for (i = 0; i < flags_count; i++) {

        if (((value >> (flags_count - 1 - i)) & 1)) {

            wmem_strbuf_append_c(buf, first_letters[i]);

        } else {

            wmem_strbuf_append_c(buf, '*');

        }

    }

    return wmem_strbuf_finalize(buf);

}

/*

 * Name: dissect_lacp

 *

 * Description:

 *    This function is used to dissect the Link Aggregation Control Protocol

 *    defined in IEEE 802.1AX

 *

 * Input Arguments:

 *    tvb:   buffer associated with the rcv packet (see tvbuff.h).

 *    pinfo: structure associated with the rcv packet (see packet_info.h).

 *    tree:  the protocol tree associated with the rcv packet (see proto.h).

 *

 * Return Values: None

 *

 * Notes:

 */

static int

dissect_lacp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)

{

    int          offset = 0, length_remaining;

    unsigned     tlv_type, tlv_length;

    unsigned     version, port, key;

    const char   *sysidstr, *flagstr;

    uint32_t     protodetect;

    uint8_t      is_vlacp;

    proto_tree *lacp_tree;

    proto_item *lacp_item, *tlv_type_item, *tlv_length_item;

    proto_item *ti;

    static int * const actor_flags[] = {

        &hf_lacp_flags_a_activity,

        &hf_lacp_flags_a_timeout,

        &hf_lacp_flags_a_aggregation,

        &hf_lacp_flags_a_sync,

        &hf_lacp_flags_a_collecting,

        &hf_lacp_flags_a_distrib,

        &hf_lacp_flags_a_defaulted,

        &hf_lacp_flags_a_expired,

        NULL

    };

    static int * const partner_flags[] = {

        &hf_lacp_flags_p_activity,

        &hf_lacp_flags_p_timeout,

        &hf_lacp_flags_p_aggregation,

        &hf_lacp_flags_p_sync,

        &hf_lacp_flags_p_collecting,

        &hf_lacp_flags_p_distrib,

        &hf_lacp_flags_p_defaulted,

        &hf_lacp_flags_p_expired,

        NULL

    };

    col_set_str(pinfo->cinfo, COL_PROTOCOL, "LACP");

    col_set_str(pinfo->cinfo, COL_INFO, "Link Aggregation Control Protocol");

    /* FIXME

     * Validate that the destination MAC address is one of the following

     * (IEEE 802.1AX-2014 6.2.11.2):

     * 01-80-C2-00-00-00: Nearest Customer Bridge group address

     * 01-80-C2-00-00-02: IEEE 802.3 Slow_Protocols_Mulitcast group address

     * 01-80-C2-00-00-03: Nearest non-TPMR Bridge group address

     */

    protodetect = tvb_get_ntohl(tvb, 0);

    if ((protodetect == VLACP_MAGIC_LACP) || (protodetect == VLACP_MAGIC_MARKER)) {

      is_vlacp = 1;

      /* Add vLACP Heading */

      lacp_item = proto_tree_add_protocol_format(tree, proto_lacp, tvb,

                                                 0, -1, "Virtual Link Aggregation Control Protocol");

    } else {

      is_vlacp = 0;

      /* Add LACP Heading - Note: 1 byte for slowprotocol has been consumed already */

      lacp_item = proto_tree_add_protocol_format(tree, proto_lacp, tvb,

                                                 0, -1, "Link Aggregation Control Protocol");

    }

    lacp_tree = proto_item_add_subtree(lacp_item, ett_lacp);

    if (is_vlacp == 1) {

      proto_tree_add_item(lacp_tree, hf_lacp_vlacp_subtype, tvb, offset, 1, ENC_NA);

      offset += 1;

    }

    /* Version Number */

    proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_version, tvb, offset, 1, ENC_NA, &version);

    offset += 1;

    col_add_fstr(pinfo->cinfo, COL_INFO, "v%d", version);

    /* Actor */

    tlv_type_item = proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_tlv_type, tvb, offset, 1, ENC_BIG_ENDIAN, &tlv_type);

    offset += 1;

    tlv_length_item = proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_tlv_length, tvb, offset, 1, ENC_BIG_ENDIAN, &tlv_length);

    offset += 1;

    if (tlv_type != LACPDU_TYPE_ACTOR_INFORMATION) {

        expert_add_info(pinfo, tlv_type_item, &ei_lacp_wrong_tlv_type);

    }

    if (tlv_length != 20) {

        expert_add_info(pinfo, tlv_length_item, &ei_lacp_wrong_tlv_length);

    }

    proto_tree_add_item(lacp_tree, hf_lacp_actor_sysid_priority, tvb, offset, 2, ENC_BIG_ENDIAN);

    offset += 2;

    proto_tree_add_item(lacp_tree, hf_lacp_actor_sysid, tvb, offset, 6, ENC_NA);

    sysidstr = tvb_ether_to_str(pinfo->pool, tvb, offset);

    offset += 6;

    proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_actor_key, tvb, offset, 2, ENC_BIG_ENDIAN, &key);

    offset += 2;

    proto_tree_add_item(lacp_tree, hf_lacp_actor_port_priority, tvb, offset, 2, ENC_BIG_ENDIAN);

    offset += 2;

    proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_actor_port, tvb, offset, 2, ENC_BIG_ENDIAN, &port);

    offset += 2;

    proto_tree_add_bitmask_with_flags(lacp_tree, tvb, offset, hf_lacp_actor_state,

                           ett_lacp_a_flags, actor_flags, ENC_NA, BMT_NO_INT|BMT_NO_TFS|BMT_NO_FALSE);

    flagstr = lacp_state_flags_to_str(pinfo->pool, tvb_get_uint8(tvb, offset));

    ti = proto_tree_add_string(lacp_tree, hf_lacp_actor_state_str, tvb, offset, 1, flagstr);

    proto_item_set_generated(ti);

    offset += 1;

    proto_tree_add_item(lacp_tree, hf_lacp_actor_reserved, tvb, offset, 3, ENC_NA);

    offset += 3;

    col_append_fstr(pinfo->cinfo, COL_INFO, " ACTOR %s P: %d K: %d %s", sysidstr, port, key, flagstr);

    /* Partner */

    tlv_type_item = proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_tlv_type, tvb, offset, 1, ENC_BIG_ENDIAN, &tlv_type);

    offset += 1;

    tlv_length_item = proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_tlv_length, tvb, offset, 1, ENC_BIG_ENDIAN, &tlv_length);

    offset += 1;

    if (tlv_type != LACPDU_TYPE_PARTNER_INFORMATION) {

        expert_add_info(pinfo, tlv_type_item, &ei_lacp_wrong_tlv_type);

    }

    if (tlv_length != 20) {

        expert_add_info(pinfo, tlv_length_item, &ei_lacp_wrong_tlv_length);

    }

    proto_tree_add_item(lacp_tree, hf_lacp_partner_sysid_priority, tvb, offset, 2, ENC_BIG_ENDIAN);

    offset += 2;

    proto_tree_add_item(lacp_tree, hf_lacp_partner_sysid, tvb, offset, 6, ENC_NA);

    sysidstr = tvb_ether_to_str(pinfo->pool, tvb, offset);

    offset += 6;

    proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_partner_key, tvb, offset, 2, ENC_BIG_ENDIAN, &key);

    offset += 2;

    proto_tree_add_item(lacp_tree, hf_lacp_partner_port_priority, tvb, offset, 2, ENC_BIG_ENDIAN);

    offset += 2;

    proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_partner_port, tvb, offset, 2, ENC_BIG_ENDIAN, &port);

    offset += 2;

    proto_tree_add_bitmask_with_flags(lacp_tree, tvb, offset, hf_lacp_partner_state, ett_lacp_p_flags, partner_flags, ENC_NA, BMT_NO_INT|BMT_NO_TFS|BMT_NO_FALSE);

    flagstr = lacp_state_flags_to_str(pinfo->pool, tvb_get_uint8(tvb, offset));

    ti = proto_tree_add_string(lacp_tree, hf_lacp_partner_state_str, tvb, offset, 1, flagstr);

    proto_item_set_generated(ti);

    offset += 1;

    proto_tree_add_item(lacp_tree, hf_lacp_partner_reserved, tvb, offset, 3, ENC_NA);

    offset += 3;

    col_append_fstr(pinfo->cinfo, COL_INFO, " PARTNER %s P: %d K: %d %s", sysidstr, port, key, flagstr);

    /* Collector */

    tlv_type_item = proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_tlv_type, tvb, offset, 1, ENC_BIG_ENDIAN, &tlv_type);

    offset += 1;

    tlv_length_item = proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_tlv_length, tvb, offset, 1, ENC_BIG_ENDIAN, &tlv_length);

    offset += 1;

    if (tlv_type != LACPDU_TYPE_COLLECTOR_INFORMATION) {

        expert_add_info(pinfo, tlv_type_item, &ei_lacp_wrong_tlv_type);

    }

    if (tlv_length != 16) {

        expert_add_info(pinfo, tlv_length_item, &ei_lacp_wrong_tlv_length);

    }

    proto_tree_add_item(lacp_tree, hf_lacp_coll_max_delay, tvb, offset, 2, ENC_BIG_ENDIAN);

    offset += 2;

    proto_tree_add_item(lacp_tree, hf_lacp_coll_reserved, tvb, offset, 12, ENC_NA);

    offset += 12;

    /* col_append_fstr(pinfo->cinfo, COL_INFO, " COLLECTOR"); */

    /* Other TLVs (LACP version 2) */

    proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_tlv_type, tvb, offset, 1, ENC_BIG_ENDIAN, &tlv_type);

    offset += 1;

    tlv_length_item = proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_tlv_length, tvb, offset, 1, ENC_BIG_ENDIAN, &tlv_length);

    offset += 1;

    while (tlv_type != LACPDU_TYPE_TERMINATOR && tlv_length >= 2) {

        offset += (tlv_length - 2);

        proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_tlv_type, tvb, offset, 1, ENC_BIG_ENDIAN, &tlv_type);

        offset += 1;

        tlv_length_item = proto_tree_add_item_ret_uint(lacp_tree, hf_lacp_tlv_length, tvb, offset, 1, ENC_BIG_ENDIAN, &tlv_length);

        offset += 1;

    }

    /* Terminator - already handled */

    if (tlv_length != 0) {

        expert_add_info(pinfo, tlv_length_item, &ei_lacp_wrong_tlv_length);

    }

    /* Pad */

    if (offset < (128 - 1 - 18)) {  /* LACPv1 fixed size - Eth */

        proto_tree_add_item(lacp_tree, hf_lacp_pad, tvb, offset, (128 - 1 - 18)-offset, ENC_NA);

        offset += ((128 - 1 - 18)-offset);

    }

    /* HP specific stuff (in violation of standard) */

    length_remaining = tvb_reported_length_remaining(tvb, offset);

    if (length_remaining) {

        /* HP LACP MAD IRF, first bytes is always 0x64 and second bytes is the rest of length */

        if (length_remaining > 2 && (tvb_get_uint8(tvb, offset) == 0x64) && ((length_remaining -2) == tvb_get_uint8(tvb, offset+1)) )

        {

            proto_tree_add_item(lacp_tree, hf_lacp_vendor, tvb, offset, length_remaining, ENC_NA);

            proto_tree_add_item(lacp_tree, hf_lacp_vendor_hp_unknown, tvb, offset, 1, ENC_NA);

            offset += 1;

            proto_tree_add_item(lacp_tree, hf_lacp_vendor_hp_length, tvb, offset, 1, ENC_NA);

            offset += 1;

            proto_tree_add_item(lacp_tree, hf_lacp_vendor_hp_unknown, tvb, offset, 2, ENC_NA);

            offset += 2;

            proto_tree_add_item(lacp_tree, hf_lacp_vendor_hp_irf_domain, tvb, offset, 2, ENC_BIG_ENDIAN);

            offset += 2;

            proto_tree_add_item(lacp_tree, hf_lacp_vendor_hp_irf_mac, tvb, offset, 6, ENC_NA);

            offset += 6;

            proto_tree_add_item(lacp_tree, hf_lacp_vendor_hp_unknown, tvb, offset, 8, ENC_NA);

            offset += 8;

            proto_tree_add_item(lacp_tree, hf_lacp_vendor_hp_irf_switch, tvb, offset, 2, ENC_BIG_ENDIAN);

            offset += 2;

            proto_tree_add_item(lacp_tree, hf_lacp_vendor_hp_irf_port, tvb, offset, 2, ENC_BIG_ENDIAN);

            offset += 2;

            proto_tree_add_item(lacp_tree, hf_lacp_vendor_hp_unknown, tvb, offset, 2, ENC_NA);

        } else {

            /* Not the HP specific extras.  Don't claim the remaining data.  It may actually be an ethernet trailer. */

            set_actual_length(tvb, tvb_captured_length(tvb) - length_remaining);

            proto_item_set_len(lacp_item, tvb_captured_length(tvb));

        }

    }

    return tvb_captured_length(tvb);

}

/* Register the protocol with Wireshark */

void

proto_register_lacp(void)

{

/* Setup list of header fields */

    static hf_register_info hf[] = {

        { &hf_lacp_vlacp_subtype,

          { "vLACP subtype",          "lacp.vlacp_subtype",

            FT_UINT8,    BASE_DEC,    NULL,    0x0,

            "Avaya vlacp unused lacp subtype byte", HFILL }},

        { &hf_lacp_version,

          { "LACP Version",          "lacp.version",

            FT_UINT8,    BASE_HEX,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_tlv_type,

          { "TLV Type",               "lacp.tlv_type",

            FT_UINT8,    BASE_HEX,    VALS(lacp_type_vals),    0x0,

            NULL, HFILL }},

        { &hf_lacp_tlv_length,

          { "TLV Length",             "lacp.tlv_length",

            FT_UINT8,    BASE_HEX,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_actor_sysid_priority,

          { "Actor System Priority",  "lacp.actor.sys_priority",

            FT_UINT16,    BASE_DEC,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_actor_sysid,

          { "Actor System ID",         "lacp.actor.sysid",

            FT_ETHER,    BASE_NONE,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_actor_key,

          { "Actor Key",            "lacp.actor.key",

            FT_UINT16,    BASE_DEC,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_actor_port_priority,

          { "Actor Port Priority",            "lacp.actor.port_priority",

            FT_UINT16,    BASE_DEC,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_actor_port,

          { "Actor Port",            "lacp.actor.port",

            FT_UINT16,    BASE_DEC,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_actor_state,

          { "Actor State",            "lacp.actor.state",

            FT_UINT8,    BASE_HEX,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_actor_state_str,

          { "Actor State Flags",            "lacp.actor.state_str",

            FT_STRING,    BASE_NONE,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_flags_a_activity,

          { "LACP Activity",        "lacp.actor.state.activity",

            FT_BOOLEAN,    8,        TFS(&tfs_active_passive),    LACPDU_FLAGS_ACTIVITY,

            NULL, HFILL }},

        { &hf_lacp_flags_a_timeout,

          { "LACP Timeout",        "lacp.actor.state.timeout",

            FT_BOOLEAN,    8,        TFS(&tfs_short_long_timeout),    LACPDU_FLAGS_TIMEOUT,

            NULL, HFILL }},

        { &hf_lacp_flags_a_aggregation,

          { "Aggregation",        "lacp.actor.state.aggregation",

            FT_BOOLEAN,    8,        TFS(&tfs_aggregatable_individual),    LACPDU_FLAGS_AGGREGATION,

            NULL, HFILL }},

        { &hf_lacp_flags_a_sync,

          { "Synchronization",        "lacp.actor.state.synchronization",

            FT_BOOLEAN,    8,        TFS(&tfs_in_sync_out_sync),    LACPDU_FLAGS_SYNC,

            NULL, HFILL }},

        { &hf_lacp_flags_a_collecting,

          { "Collecting",        "lacp.actor.state.collecting",

            FT_BOOLEAN,    8,        TFS(&tfs_enabled_disabled),    LACPDU_FLAGS_COLLECTING,

            NULL, HFILL }},

        { &hf_lacp_flags_a_distrib,

          { "Distributing",        "lacp.actor.state.distributing",

            FT_BOOLEAN,    8,        TFS(&tfs_enabled_disabled),    LACPDU_FLAGS_DISTRIB,

            NULL, HFILL }},

        { &hf_lacp_flags_a_defaulted,

          { "Defaulted",        "lacp.actor.state.defaulted",

            FT_BOOLEAN,    8,        TFS(&tfs_yes_no),    LACPDU_FLAGS_DEFAULTED,

            "1 = Actor Rx machine is using DEFAULT Partner info, 0 = using info in Rx'd LACPDU", HFILL }},

        { &hf_lacp_flags_a_expired,

          { "Expired",        "lacp.actor.state.expired",

            FT_BOOLEAN,    8,        TFS(&tfs_yes_no),    LACPDU_FLAGS_EXPIRED,

            NULL, HFILL }},

        { &hf_lacp_actor_reserved,

          { "Reserved",        "lacp.actor.reserved",

            FT_BYTES,    BASE_NONE,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_partner_sysid_priority,

          { "Partner System Priority",  "lacp.partner.sys_priority",

            FT_UINT16,    BASE_DEC,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_partner_sysid,

          { "Partner System",            "lacp.partner.sysid",

            FT_ETHER,    BASE_NONE,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_partner_key,

          { "Partner Key",            "lacp.partner.key",

            FT_UINT16,    BASE_DEC,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_partner_port_priority,

          { "Partner Port Priority",            "lacp.partner.port_priority",

            FT_UINT16,    BASE_DEC,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_partner_port,

          { "Partner Port",            "lacp.partner.port",

            FT_UINT16,    BASE_DEC,    NULL,    0x0,

            "The port number associated with this link assigned to the port by the Partner (via Management or Admin)", HFILL }},

        { &hf_lacp_partner_state,

          { "Partner State",            "lacp.partner.state",

            FT_UINT8,    BASE_HEX,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_partner_state_str,

          { "Partner State Flags",            "lacp.partner.state_str",

            FT_STRING,    BASE_NONE,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_flags_p_activity,

          { "LACP Activity",        "lacp.partner.state.activity",

            FT_BOOLEAN,    8,        TFS(&tfs_active_passive),    LACPDU_FLAGS_ACTIVITY,

            NULL, HFILL }},

        { &hf_lacp_flags_p_timeout,

          { "LACP Timeout",        "lacp.partner.state.timeout",

            FT_BOOLEAN,    8,        TFS(&tfs_short_long_timeout),    LACPDU_FLAGS_TIMEOUT,

            NULL, HFILL }},

        { &hf_lacp_flags_p_aggregation,

          { "Aggregation",        "lacp.partner.state.aggregation",

            FT_BOOLEAN,    8,        TFS(&tfs_aggregatable_individual),    LACPDU_FLAGS_AGGREGATION,

            NULL, HFILL }},

        { &hf_lacp_flags_p_sync,

          { "Synchronization",        "lacp.partner.state.synchronization",

            FT_BOOLEAN,    8,        TFS(&tfs_in_sync_out_sync),    LACPDU_FLAGS_SYNC,

            NULL, HFILL }},

        { &hf_lacp_flags_p_collecting,

          { "Collecting",        "lacp.partner.state.collecting",

            FT_BOOLEAN,    8,        TFS(&tfs_enabled_disabled),    LACPDU_FLAGS_COLLECTING,

            NULL, HFILL }},

        { &hf_lacp_flags_p_distrib,

          { "Distributing",        "lacp.partner.state.distributing",

            FT_BOOLEAN,    8,        TFS(&tfs_enabled_disabled),    LACPDU_FLAGS_DISTRIB,

            NULL, HFILL }},

        { &hf_lacp_flags_p_defaulted,

          { "Defaulted",        "lacp.partner.state.defaulted",

            FT_BOOLEAN,    8,        TFS(&tfs_yes_no),    LACPDU_FLAGS_DEFAULTED,

            "1 = Actor Rx machine is using DEFAULT Partner info, 0 = using info in Rx'd LACPDU", HFILL }},

        { &hf_lacp_flags_p_expired,

          { "Expired",        "lacp.partner.state.expired",

            FT_BOOLEAN,    8,        TFS(&tfs_yes_no),    LACPDU_FLAGS_EXPIRED,

            NULL, HFILL }},

        { &hf_lacp_partner_reserved,

          { "Reserved",        "lacp.partner.reserved",

            FT_BYTES,    BASE_NONE,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_coll_max_delay,

          { "Collector Max Delay",  "lacp.collector.max_delay",

            FT_UINT16,    BASE_DEC,    NULL,    0x0,

            "The max delay of the station sending the LACPDU (in tens of usecs)", HFILL }},

        { &hf_lacp_coll_reserved,

          { "Reserved",        "lacp.coll_reserved",

            FT_BYTES,    BASE_NONE,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_pad,

          { "Pad",        "lacp.pad",

            FT_BYTES,    BASE_NONE,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_vendor,

          { "Unknown vendor",        "lacp.vendor",

            FT_BYTES,    BASE_NONE,    NULL,    0x0,

            "Some extra bytes (Vendor Specific ?)", HFILL }},

        /* HP IRF MAD LACP */

        { &hf_lacp_vendor_hp_length,

          { "Length",        "lacp.vendor.hp.length",

            FT_UINT8,    BASE_DEC,    NULL,    0x0,

            "The length of HP TLV", HFILL }},

        { &hf_lacp_vendor_hp_irf_domain,

          { "IRF Domain",        "lacp.vendor.hp.irf_domain",

            FT_UINT16,    BASE_DEC,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_vendor_hp_irf_mac,

          { "IRF MAC",        "lacp.vendor.hp.irf_mac",

            FT_ETHER,    BASE_NONE,    NULL,    0x0,

            NULL, HFILL }},

        { &hf_lacp_vendor_hp_irf_switch,

          { "IRF Switch",        "lacp.vendor.hp.irf_switch",

            FT_UINT16,    BASE_DEC,    NULL,    0x0,

            "Number of switch on the IRF stack", HFILL }},

        { &hf_lacp_vendor_hp_irf_port,

          { "IRF Port",        "lacp.vendor.hp.irf_port",

            FT_UINT16,    BASE_DEC,    NULL,    0x0,

            "Stack ID where the LACP is attached", HFILL }},

        { &hf_lacp_vendor_hp_unknown,

          { "Unknown",        "lacp.vendor.hp.unknown",

            FT_BYTES,    BASE_NONE,    NULL,    0x0,

            NULL, HFILL }},

    };

    /* Setup protocol subtree array */

    static int *ett[] = {

        &ett_lacp,

        &ett_lacp_a_flags,

        &ett_lacp_p_flags,

    };

    static ei_register_info ei[] = {

    { &ei_lacp_wrong_tlv_type,   { "lacp.wrong_tlv_type",   PI_MALFORMED, PI_ERROR, "TLV is not expected type",   EXPFILL }},

    { &ei_lacp_wrong_tlv_length, { "lacp.wrong_tlv_length", PI_MALFORMED, PI_ERROR, "TLV is not expected length", EXPFILL }},

    };

    expert_module_t* expert_lacp;

    /* Register the protocol name and description */

    proto_lacp = proto_register_protocol("Link Aggregation Control Protocol", "LACP", "lacp");

    /* Required function calls to register the header fields and subtrees used */

    proto_register_field_array(proto_lacp, hf, array_length(hf));

    proto_register_subtree_array(ett, array_length(ett));

    expert_lacp = expert_register_protocol(proto_lacp);

    expert_register_field_array(expert_lacp, ei, array_length(ei));

    lacp_handle = register_dissector("lacp", dissect_lacp, proto_lacp);

}

void

proto_reg_handoff_lacp(void)

{

    dissector_add_uint("slow.subtype", LACP_SUBTYPE, lacp_handle);

    dissector_add_uint("ethertype", ETHERTYPE_VLACP, lacp_handle);

}

/*

 * 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:

 */