/* packet-glbp.c

 *

 * Cisco's GLBP:  Gateway Load Balancing Protocol

 *

 * Copyright 2007 Joerg Mayer (see AUTHORS file)

 *

 * Wireshark - Network traffic analyzer

 * By Gerald Combs <gerald@wireshark.org>

 * Copyright 1998 Gerald Combs

 *

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

 */

/*

 * Documentation:

 * http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.pdf

 *

 * TODO: This dissector has been written without specs, so much of it is

 *    guesswork. Also, there are still unknown elements in the message.

 * Some debug output:

 * GLBP: Fa0/0 Grp 1020 Hello  out VG Active  pri 100 vIP FE80::C800:8FF:FE64:AAAA

 *       hello 3000, hold 10000 VF 1 Active  pri 167 vMAC 0007.b403.fc01

 * GLBP: Fa0/0 Grp 1021 Hello  out VG Active  pri 100 vIP 10.20.20.100

 *       hello 3000, hold 10000 VF 1 Active  pri 167 vMAC 0007.b403.fd01

 */

#include "config.h"

#include <epan/packet.h>

#include <epan/expert.h>

void proto_register_glbp(void);

void proto_reg_handoff_glbp(void);

static dissector_handle_t glbp_handle;

#define GLBP_UDP_PORT 3222

static int proto_glbp;

/* glbp header? */

static int hf_glbp_version;

static int hf_glbp_unknown1;

static int hf_glbp_group;

static int hf_glbp_unknown2;

static int hf_glbp_ownerid;

static int hf_glbp_tlv;

static int hf_glbp_type;

static int hf_glbp_length;

/* glbp type = 1 - hello */

static int hf_glbp_hello_unknown10;

static int hf_glbp_hello_vgstate;

static int hf_glbp_hello_unknown11;

static int hf_glbp_hello_priority;

static int hf_glbp_hello_unknown12;

static int hf_glbp_hello_helloint;

static int hf_glbp_hello_holdint;

static int hf_glbp_hello_redirect;

static int hf_glbp_hello_timeout;

static int hf_glbp_hello_unknown13;

static int hf_glbp_hello_addrtype;

static int hf_glbp_hello_addrlen;

static int hf_glbp_hello_virtualipv4;

static int hf_glbp_hello_virtualipv6;

static int hf_glbp_hello_virtualunk;

/* glbp type = 2 - Request/Response??? */

static int hf_glbp_reqresp_forwarder;

static int hf_glbp_reqresp_vfstate;

static int hf_glbp_reqresp_unknown21;

static int hf_glbp_reqresp_priority;

static int hf_glbp_reqresp_weight;

static int hf_glbp_reqresp_unknown22;

static int hf_glbp_reqresp_virtualmac;

/* glbp type = 3 - Auth */

static int hf_glbp_auth_authtype;

static int hf_glbp_auth_authlength;

static int hf_glbp_auth_plainpass;

static int hf_glbp_auth_md5hash;

static int hf_glbp_auth_md5chainindex;

static int hf_glbp_auth_md5chainhash;

static int hf_glbp_auth_authunknown;

/* unknown type */

static int hf_glbp_unknown_data;

static int ett_glbp;

static int ett_glbp_tlv;

/* filterable expert infos */

static expert_field ei_glbp_ipv4_wrong_length;

static expert_field ei_glbp_ipv6_wrong_length;

static expert_field ei_glbp_tlv_length_too_small;

static expert_field ei_glbp_tlv_invalid_bytes_used;

static const value_string glbp_type_vals[] = {

  { 1,  "Hello" },

  { 2,  "Request/Response?" },

  { 3,  "Auth" },

  { 0, NULL }

};

#if 0

static const value_string glbp_reqresp_forwarder_vals[] = {

  { 0,  "Request?" },

  { 2,  "Response?" },

  { 0, NULL }

};

#endif

static const value_string glbp_addr_type_vals[] = {

  { 1,  "IPv4" },

  { 2,  "IPv6" },

  { 0, NULL }

};

static const value_string glbp_auth_type_vals[] = {

  { 0,  "None" },

  { 1,  "Plain text" },

  { 2,  "MD5 string" },

  { 3,  "MD5 chain" },

  { 0, NULL }

};

#if 0

static const value_string glbp_loadbalancing_vals[] = {

  { x,  "None (AVG only)" },

  { x,  "Weighted" },

  { x,  "Host dependent" },

  { x,  "Round robin" },

  { 0, NULL }

};

#endif

static const value_string glbp_vgstate_vals[] = {

#if 0

  {    x,  "Disabled" },

  {    x,  "Initial" },

#endif

  {    4,  "Listen" },

  {    8,  "Speak" },

  { 0x10,  "Standby" },

  { 0x20,  "Active" },

  { 0, NULL }

};

static const value_string glbp_vfstate_vals[] = {

#if 0

  {    x,  "Disabled" },

  {    x,  "Initial" },

#endif

  {    4,  "Listen" },

  { 0x20,  "Active" },

  { 0, NULL }

};

static int

dissect_glbp_hello(tvbuff_t *tvb, int offset,

        packet_info *pinfo, proto_tree *tlv_tree)

{

  uint8_t addrtype;

  uint8_t addrlen;

  proto_tree_add_item(tlv_tree, hf_glbp_hello_unknown10, tvb, offset, 1, ENC_NA);

  offset ++;

  proto_tree_add_item(tlv_tree, hf_glbp_hello_vgstate,   tvb, offset, 1, ENC_BIG_ENDIAN);

  offset ++;

  proto_tree_add_item(tlv_tree, hf_glbp_hello_unknown11, tvb, offset, 1, ENC_NA);

  offset ++;

  proto_tree_add_item(tlv_tree, hf_glbp_hello_priority,  tvb, offset, 1, ENC_BIG_ENDIAN);

  offset++;

  proto_tree_add_item(tlv_tree, hf_glbp_hello_unknown12, tvb, offset, 2, ENC_NA);

  offset += 2;

  proto_tree_add_item(tlv_tree, hf_glbp_hello_helloint,  tvb, offset, 4, ENC_BIG_ENDIAN);

  offset += 4;

  proto_tree_add_item(tlv_tree, hf_glbp_hello_holdint,   tvb, offset, 4, ENC_BIG_ENDIAN);

  offset += 4;

  proto_tree_add_item(tlv_tree, hf_glbp_hello_redirect,  tvb, offset, 2, ENC_BIG_ENDIAN);

  offset += 2;

  proto_tree_add_item(tlv_tree, hf_glbp_hello_timeout,   tvb, offset, 2, ENC_BIG_ENDIAN);

  offset += 2;

  proto_tree_add_item(tlv_tree, hf_glbp_hello_unknown13, tvb, offset, 2, ENC_NA);

  offset += 2;

  proto_tree_add_item_ret_uint8(tlv_tree, hf_glbp_hello_addrtype,  tvb, offset, 1, ENC_BIG_ENDIAN, &addrtype);

  offset++;

  proto_tree_add_item_ret_uint8(tlv_tree, hf_glbp_hello_addrlen,   tvb, offset, 1, ENC_BIG_ENDIAN, &addrlen);

  offset++;

  switch (addrtype) {

    case 1:

    if (addrlen != 4) {

      expert_add_info_format(pinfo, NULL, &ei_glbp_ipv4_wrong_length,

        "Wrong IPv4 address length: %u", addrlen);

      return offset + addrlen;

    }

    proto_tree_add_item(tlv_tree, hf_glbp_hello_virtualipv4, tvb, offset, addrlen, ENC_BIG_ENDIAN);

    break;

  case 2:

    if (addrlen != 16) {

      expert_add_info_format(pinfo, NULL, &ei_glbp_ipv6_wrong_length,

        "Wrong IPv6 address length: %u", addrlen);

      return offset + addrlen;

    }

    proto_tree_add_item(tlv_tree, hf_glbp_hello_virtualipv6, tvb, offset, addrlen, ENC_NA);

    break;

  default:

    proto_tree_add_item(tlv_tree, hf_glbp_hello_virtualunk, tvb, offset, addrlen, ENC_NA);

    break;

  }

  offset += addrlen;

  col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",

    val_to_str(pinfo->pool, addrtype, glbp_addr_type_vals, "%d"));

  return offset;

}

static int

dissect_glbp_reqresp(tvbuff_t *tvb, int offset,

        packet_info *pinfo _U_, proto_tree *tlv_tree)

{

  proto_tree_add_item(tlv_tree, hf_glbp_reqresp_forwarder,  tvb, offset, 1, ENC_BIG_ENDIAN);

  offset++;

  proto_tree_add_item(tlv_tree, hf_glbp_reqresp_vfstate,    tvb, offset, 1, ENC_BIG_ENDIAN);

  offset++;

  proto_tree_add_item(tlv_tree, hf_glbp_reqresp_unknown21,  tvb, offset, 1, ENC_NA);

  offset += 1;

  proto_tree_add_item(tlv_tree, hf_glbp_reqresp_priority,   tvb, offset, 1, ENC_BIG_ENDIAN);

  offset++;

  proto_tree_add_item(tlv_tree, hf_glbp_reqresp_weight,     tvb, offset, 1, ENC_BIG_ENDIAN);

  offset++;

  proto_tree_add_item(tlv_tree, hf_glbp_reqresp_unknown22,  tvb, offset, 7, ENC_NA);

  offset += 7;

  proto_tree_add_item(tlv_tree, hf_glbp_reqresp_virtualmac, tvb, offset, 6, ENC_NA);

  offset += 6;

  return offset;

}

static int

dissect_glbp_auth(tvbuff_t *tvb, int offset,

        packet_info *pinfo _U_, proto_tree *tlv_tree)

{

  uint8_t authtype;

  uint8_t authlength;

  proto_tree_add_item_ret_uint8(tlv_tree, hf_glbp_auth_authtype,   tvb, offset, 1, ENC_BIG_ENDIAN, &authtype);

  offset++;

  proto_tree_add_item_ret_uint8(tlv_tree, hf_glbp_auth_authlength, tvb, offset, 1, ENC_BIG_ENDIAN, &authlength);

  offset++;

  switch(authtype) {

  case 1:

    proto_tree_add_item(tlv_tree, hf_glbp_auth_plainpass, tvb, offset, authlength, ENC_ASCII);

    offset += authlength;

    break;

  case 2:

    proto_tree_add_item(tlv_tree, hf_glbp_auth_md5hash,   tvb, offset, authlength, ENC_NA);

    offset += authlength;

    break;

  case 3:

    proto_tree_add_item(tlv_tree, hf_glbp_auth_md5chainindex, tvb, offset, 4, ENC_BIG_ENDIAN);

    proto_tree_add_item(tlv_tree, hf_glbp_auth_md5chainhash,  tvb, offset+4, authlength-4, ENC_NA);

    offset += authlength;

    break;

  default:

    proto_tree_add_item(tlv_tree, hf_glbp_auth_authunknown, tvb, offset, authlength, ENC_NA);

    offset += authlength;

    break;

  }

  return offset;

}

static int

dissect_glbp_unknown(tvbuff_t *tvb, int offset, uint32_t length,

        packet_info *pinfo _U_, proto_tree *tlv_tree)

{

  proto_tree_add_item(tlv_tree, hf_glbp_unknown_data, tvb, offset, length, ENC_NA);

  offset += length;

  return offset;

}

static int

dissect_glbp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)

{

  proto_tree *glbp_tree;

  proto_tree *tlv_tree;

  proto_item *ti;

  uint8_t     type;

  int         offset    = 0;

  int         lastoffset;

  uint8_t     length;

  uint16_t    group;

  group = tvb_get_ntohs(tvb, 2);

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

  col_add_fstr(pinfo->cinfo, COL_INFO, "G: %d", group);

  ti = proto_tree_add_item(tree, proto_glbp, tvb, 0, -1, ENC_NA);

  glbp_tree = proto_item_add_subtree(ti, ett_glbp);

  /* glbp header? */

  proto_tree_add_item(glbp_tree, hf_glbp_version, tvb, offset, 1,  ENC_BIG_ENDIAN);

  offset++;

  proto_tree_add_item(glbp_tree, hf_glbp_unknown1, tvb, offset, 1,  ENC_BIG_ENDIAN);

  offset++;

  proto_tree_add_item(glbp_tree, hf_glbp_group, tvb, offset, 2,  ENC_BIG_ENDIAN);

  offset += 2;

  proto_tree_add_item(glbp_tree, hf_glbp_unknown2, tvb, offset, 2,  ENC_NA);

  offset += 2;

  proto_tree_add_item(glbp_tree, hf_glbp_ownerid, tvb, offset, 6, ENC_NA);

  offset += 6;

  while (tvb_reported_length_remaining(tvb, offset) > 0) {

    type = tvb_get_uint8(tvb, offset);

    length = tvb_get_uint8(tvb, offset+1);

    if (length < 2) {

      expert_add_info_format(pinfo, NULL, &ei_glbp_tlv_length_too_small,

        "Length %u too small", length);

      return offset;

    }

    length -= 2;

    ti = proto_tree_add_item(glbp_tree, hf_glbp_tlv, tvb, offset, length+2, ENC_BIG_ENDIAN);

    tlv_tree = proto_item_add_subtree(ti, ett_glbp_tlv);

    proto_item_append_text(ti, " l=%d, t=%s", length+2,

                           val_to_str(pinfo->pool, type, glbp_type_vals, "%d"));

    proto_tree_add_item(tlv_tree, hf_glbp_type, tvb, offset, 1,  ENC_BIG_ENDIAN);

    offset++;

    proto_tree_add_item(tlv_tree, hf_glbp_length, tvb, offset, 1,  ENC_BIG_ENDIAN);

    offset++;

    col_append_fstr(pinfo->cinfo, COL_INFO, ", %s",

                    val_to_str(pinfo->pool, type, glbp_type_vals, "%d"));

    lastoffset = offset;

    switch(type) {

    case 1: /* Hello */

      offset = dissect_glbp_hello(tvb, offset, pinfo, tlv_tree);

      break;

    case 2: /* Request/Response */

      offset = dissect_glbp_reqresp(tvb, offset, pinfo, tlv_tree);

      break;

    case 3: /* Plaintext auth */

      offset = dissect_glbp_auth(tvb, offset, pinfo, tlv_tree);

      break;

    default:

      offset = dissect_glbp_unknown(tvb, offset, length, pinfo, tlv_tree);

      break;

    }

    if (lastoffset >= offset) {

      expert_add_info(pinfo, NULL, &ei_glbp_tlv_invalid_bytes_used);

      return lastoffset;

    }

    /* Skip over trailing bytes before starting with the next element */

    if (lastoffset + length > offset)

      offset = lastoffset + length;

  }

  return offset;

}

static bool

test_glbp(tvbuff_t *tvb, packet_info *pinfo)

{

  uint32_t unknown1;

  if ( tvb_captured_length(tvb) < 2)

    return false;

  unknown1 = tvb_get_uint8(tvb, 1);

  if (tvb_get_uint8(tvb, 0) != 1 /* version? */

      || unknown1 > 4

      || pinfo->srcport != pinfo->destport

#if 0 /* XXX */

      || unknown1 == 0 && pinfo->net_dst != ipv4:224.0.0.102

      && pinfo->net_dst != ipv6:...

      || unknown1 == 0 && pinfo->dl_src != ether:c2-00-7c-b8-00-00

#endif

    ) {

    return false;

  }

  return true;

}

static int

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

{

  if ( !test_glbp(tvb, pinfo) ) {

    return 0;

  }

  return dissect_glbp(tvb, pinfo, tree);

}

void

proto_register_glbp(void)

{

  static hf_register_info hf[] = {

    /* Header */

    { &hf_glbp_version,

      { "Version?",           "glbp.version", FT_UINT8, BASE_DEC, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_unknown1,

      { "Unknown1",           "glbp.unknown1", FT_UINT8, BASE_DEC, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_group,

      { "Group",              "glbp.group", FT_UINT16, BASE_DEC, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_unknown2,

      { "Unknown2",           "glbp.unknown2", FT_BYTES, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_ownerid,

      { "Owner ID",           "glbp.ownerid", FT_ETHER, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_tlv,

      { "TLV",                "glbp.tlv", FT_PROTOCOL, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_type,

      { "Type",               "glbp.type", FT_UINT8, BASE_DEC, VALS(glbp_type_vals),

        0x0, NULL, HFILL }},

    { &hf_glbp_length,

      { "Length",             "glbp.length", FT_UINT8, BASE_DEC, NULL,

        0x0, NULL, HFILL }},

    /* type = 1 - hello */

    { &hf_glbp_hello_unknown10,

      { "Unknown1-0",         "glbp.hello.unknown10", FT_BYTES, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_hello_vgstate,

      { "VG state?",          "glbp.hello.vgstate", FT_UINT8, BASE_DEC, VALS(glbp_vgstate_vals),

        0x0, NULL, HFILL }},

    { &hf_glbp_hello_unknown11,

      { "Unknown1-1",         "glbp.hello.unknown11", FT_BYTES, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_hello_priority,

      { "Priority",           "glbp.hello.priority", FT_UINT8, BASE_DEC, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_hello_unknown12,

      { "Unknown1-2",         "glbp.hello.unknown12", FT_BYTES, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_hello_helloint,

      { "Helloint",           "glbp.hello.helloint", FT_UINT32, BASE_DEC, NULL,

        0x0, "Hello interval [msec]", HFILL }},

    { &hf_glbp_hello_holdint,

      { "Holdint",            "glbp.hello.holdint", FT_UINT32, BASE_DEC, NULL,

        0x0, "Hold interval [msec]", HFILL }},

    { &hf_glbp_hello_redirect,

      { "Redirect",           "glbp.hello.redirect", FT_UINT16, BASE_DEC, NULL,

        0x0, "Redirect interval [sec]", HFILL }},

    { &hf_glbp_hello_timeout,

      { "Timeout",            "glbp.hello.timeout", FT_UINT16, BASE_DEC, NULL,

        0x0, "Forwarder timeout interval [sec]", HFILL }},

    { &hf_glbp_hello_unknown13,

      { "Unknown1-3",         "glbp.hello.unknown13", FT_BYTES, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_hello_addrtype,

      { "Address type",       "glbp.hello.addrtype", FT_UINT8, BASE_DEC, VALS(glbp_addr_type_vals),

        0x0, NULL, HFILL }},

    { &hf_glbp_hello_addrlen,

      { "Address length",     "glbp.hello.addrlen", FT_UINT8, BASE_DEC, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_hello_virtualipv4,

      { "Virtual IPv4",       "glbp.hello.virtualipv4", FT_IPv4, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_hello_virtualipv6,

      { "Virtual IPv6",       "glbp.hello.virtualipv6", FT_IPv6, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_hello_virtualunk,

      { "Virtual Unknown",    "glbp.hello.virtualunk", FT_BYTES, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    /* type = 2 - request/response??? */

    { &hf_glbp_reqresp_forwarder,

      { "Forwarder?",         "glbp.reqresp.forwarder", FT_UINT8, BASE_DEC, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_reqresp_vfstate,

      { "VF state?",          "glbp.reqresp.vfstate", FT_UINT8, BASE_DEC, VALS(glbp_vfstate_vals),

        0x0, NULL, HFILL }},

    { &hf_glbp_reqresp_unknown21,

      { "Unknown2-1",         "glbp.reqresp.unknown21", FT_BYTES, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_reqresp_priority,

      { "Priority",           "glbp.reqresp.priority", FT_UINT8, BASE_DEC, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_reqresp_weight,

      { "Weight",             "glbp.reqresp.weight", FT_UINT8, BASE_DEC, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_reqresp_unknown22,

      { "Unknown2-2",         "glbp.reqresp.unknown22", FT_BYTES, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_reqresp_virtualmac,

      { "Virtualmac",         "glbp.reqresp.virtualmac", FT_ETHER, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    /* type = 3 - auth */

    { &hf_glbp_auth_authtype,

      { "Authtype",           "glbp.auth.authtype", FT_UINT8, BASE_DEC, VALS(glbp_auth_type_vals),

        0x0, NULL, HFILL }},

    { &hf_glbp_auth_authlength,

      { "Authlength",         "glbp.auth.authlength", FT_UINT8, BASE_DEC, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_auth_plainpass,

      { "Plain pass",         "glbp.auth.plainpass", FT_STRING, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_auth_md5hash,

      { "MD5-string hash",    "glbp.auth.md5hash", FT_BYTES, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_auth_md5chainindex,

      { "MD5-chain index",    "glbp.auth.md5chainindex", FT_UINT32, BASE_DEC, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_auth_md5chainhash,

      { "MD5-chain hash",     "glbp.auth.md5chainhash", FT_BYTES, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    { &hf_glbp_auth_authunknown,

      { "Unknown auth value", "glbp.auth.authunknown", FT_BYTES, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

    /* type = unknown */

    { &hf_glbp_unknown_data,

      { "Unknown TLV data",   "glbp.unknown.data", FT_BYTES, BASE_NONE, NULL,

        0x0, NULL, HFILL }},

  };

  static int *ett[] = {

    &ett_glbp,

    &ett_glbp_tlv,

  };

  static ei_register_info ei[] = {

    { &ei_glbp_ipv4_wrong_length,

      { "glbp.ipv4_wrong_length", PI_MALFORMED, PI_ERROR,

        "Wrong IPv4 address length",

        EXPFILL }},

    { &ei_glbp_ipv6_wrong_length,

      { "glbp.ipv6_wrong_length", PI_MALFORMED, PI_ERROR,

        "Wrong IPv6 address length",

        EXPFILL }},

    { &ei_glbp_tlv_length_too_small,

      { "glbp.tlv_length_too_small", PI_MALFORMED, PI_ERROR,

        "TLV Length too small",

        EXPFILL }},

    { &ei_glbp_tlv_invalid_bytes_used,

      { "glbp.tlv_invalid_bytes_used", PI_MALFORMED, PI_ERROR,

        "Zero or negative length",

        EXPFILL }},

  };

  expert_module_t* expert_glbp;

  proto_glbp = proto_register_protocol("Gateway Load Balancing Protocol", "GLBP", "glbp");

  proto_register_field_array(proto_glbp, hf, array_length(hf));

  proto_register_subtree_array(ett, array_length(ett));

  expert_glbp = expert_register_protocol(proto_glbp);

  expert_register_field_array(expert_glbp, ei, array_length(ei));

  glbp_handle = register_dissector("glbp", dissect_glbp_static, proto_glbp);

}

void

proto_reg_handoff_glbp(void)

{

  dissector_add_uint_with_preference("udp.port", GLBP_UDP_PORT, glbp_handle);

}

/*

 * Editor modelines  -  https://www.wireshark.org/tools/modelines.html

 *

 * Local Variables:

 * c-basic-offset: 2

 * tab-width: 8

 * indent-tabs-mode: nil

 * End:

 *

 * ex: set shiftwidth=2 tabstop=8 expandtab:

 * :indentSize=2:tabSize=8:noTabs=true:

 */