nexmon – Rev 1
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/* packet-vtp.c
* Routines for the disassembly of Cisco's VLAN Trunking Protocol
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
/*
* See
*
* http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094c52.shtml
*
* for some information on VTP.
*/
void proto_register_vtp(void);
void proto_reg_handoff_vtp(void);
static int proto_vtp = -1;
static int hf_vtp_version = -1;
static int hf_vtp_code = -1;
static int hf_vtp_followers = -1;
static int hf_vtp_md_len = -1;
static int hf_vtp_md = -1;
static int hf_vtp_conf_rev_num = -1;
static int hf_vtp_upd_id = -1;
static int hf_vtp_upd_ts = -1;
static int hf_vtp_md5_digest = -1;
static int hf_vtp_seq_num = -1;
static int hf_vtp_start_value = -1;
static int hf_vtp_vlan_info_len = -1;
static int hf_vtp_vlan_status = -1;
static int hf_vtp_vlan_status_vlan_susp = -1;
static int hf_vtp_vlan_type = -1;
static int hf_vtp_vlan_name_len = -1;
static int hf_vtp_isl_vlan_id = -1;
static int hf_vtp_mtu_size = -1;
static int hf_vtp_802_10_index = -1;
static int hf_vtp_vlan_name = -1;
static int hf_vtp_vlan_tlvtype = -1;
static int hf_vtp_vlan_tlvlength = -1;
static int hf_vtp_pruning_first_vid = -1;
static int hf_vtp_pruning_last_vid = -1;
static int hf_vtp_pruning_active_vid = -1;
static int hf_vtp_vlan_src_route_ring_num = -1;
static int hf_vtp_vlan_src_route_bridge_num = -1;
static int hf_vtp_vlan_stp_type = -1;
static int hf_vtp_vlan_parent_vlan = -1;
static int hf_vtp_vlan_translationally_bridged_vlans = -1;
static int hf_vtp_vlan_pruning = -1;
static int hf_vtp_vlan_bridge_type = -1;
static int hf_vtp_vlan_max_are_hop_count = -1;
static int hf_vtp_vlan_max_ste_hop_count = -1;
static int hf_vtp_vlan_backup_crf_mode = -1;
static int hf_vtp_vlan_data = -1;
static gint ett_vtp = -1;
static gint ett_vtp_vlan_info = -1;
static gint ett_vtp_vlan_status = -1;
static gint ett_vtp_tlv = -1;
static gint ett_vtp_pruning = -1;
static expert_field ei_vtp_vlan_tlvlength_bad = EI_INIT;
static int
dissect_vlan_info(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *tree);
static void
dissect_vlan_info_tlv(tvbuff_t *tvb, packet_info *pinfo, int offset, int length,
proto_tree *tree, proto_item *ti, guint8 type);
#define SUMMARY_ADVERT 0x01
#define SUBSET_ADVERT 0x02
#define ADVERT_REQUEST 0x03
#define JOIN_MSG 0x04
static const value_string type_vals[] = {
{ SUMMARY_ADVERT, "Summary Advertisement" },
{ SUBSET_ADVERT, "Subset Advertisement" },
{ ADVERT_REQUEST, "Advertisement Request" },
{ JOIN_MSG, "Join/Prune Message" },
{ 0, NULL },
};
static void
set_vtp_info_col(tvbuff_t *tvb, packet_info *pinfo)
{
switch (tvb_get_guint8(tvb, 1)) {
case SUMMARY_ADVERT:
col_add_fstr(pinfo->cinfo, COL_INFO,
"Summary Advertisement, Revision: %u", tvb_get_ntohl(tvb, 36));
if (tvb_get_guint8(tvb, 2) > 0) {
col_append_fstr(pinfo->cinfo, COL_INFO,
", Followers: %u", tvb_get_guint8(tvb, 2));
}
break;
case SUBSET_ADVERT:
col_add_fstr(pinfo->cinfo, COL_INFO,
"Subset Advertisement, Revision: %u, Seq: %u",
tvb_get_ntohl(tvb, 36), tvb_get_guint8(tvb, 2));
break;
case ADVERT_REQUEST:
col_set_str(pinfo->cinfo, COL_INFO, "Advertisement Request");
break;
case JOIN_MSG:
col_set_str(pinfo->cinfo, COL_INFO, "Join");
break;
default:
col_set_str(pinfo->cinfo, COL_INFO, "Unrecognized VTP message");
break;
}
}
static int
dissect_vtp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *ti;
proto_tree *vtp_tree = NULL, *vtp_pruning_tree = NULL;
int offset = 0;
guint8 code;
guint8 *upd_timestamp;
int vlan_info_len;
int pruning_vlan_id;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "VTP");
set_vtp_info_col(tvb, pinfo);
ti = proto_tree_add_item(tree, proto_vtp, tvb, offset, -1, ENC_NA);
vtp_tree = proto_item_add_subtree(ti, ett_vtp);
proto_tree_add_item(vtp_tree, hf_vtp_version, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
code = tvb_get_guint8(tvb, offset);
proto_tree_add_item(vtp_tree, hf_vtp_code, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
switch (code) {
case SUMMARY_ADVERT:
proto_tree_add_item(vtp_tree, hf_vtp_followers, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(vtp_tree, hf_vtp_md_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(vtp_tree, hf_vtp_md, tvb, offset, 32, ENC_ASCII|ENC_NA);
offset += 32;
proto_tree_add_item(vtp_tree, hf_vtp_conf_rev_num, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
proto_tree_add_item(vtp_tree, hf_vtp_upd_id, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
upd_timestamp = tvb_get_string_enc(wmem_packet_scope(), tvb, offset, 12, ENC_ASCII);
proto_tree_add_string_format_value(vtp_tree, hf_vtp_upd_ts, tvb,
offset, 12, (gchar*)upd_timestamp,
"%.2s-%.2s-%.2s %.2s:%.2s:%.2s",
&upd_timestamp[0], &upd_timestamp[2], &upd_timestamp[4],
&upd_timestamp[6], &upd_timestamp[8], &upd_timestamp[10]);
offset += 12;
proto_tree_add_item(vtp_tree, hf_vtp_md5_digest, tvb, offset, 16, ENC_NA);
break;
case SUBSET_ADVERT:
proto_tree_add_item(vtp_tree, hf_vtp_seq_num, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(vtp_tree, hf_vtp_md_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(vtp_tree, hf_vtp_md, tvb, offset, 32, ENC_ASCII|ENC_NA);
offset += 32;
proto_tree_add_item(vtp_tree, hf_vtp_conf_rev_num, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
while (tvb_reported_length_remaining(tvb, offset) > 0) {
vlan_info_len =
dissect_vlan_info(tvb, pinfo, offset, vtp_tree);
if (vlan_info_len <= 0)
break;
offset += vlan_info_len;
}
break;
case ADVERT_REQUEST:
offset += 1; /* skip reserved field */
proto_tree_add_item(vtp_tree, hf_vtp_md_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(vtp_tree, hf_vtp_md, tvb, offset, 32, ENC_ASCII|ENC_NA);
offset += 32;
proto_tree_add_item(vtp_tree, hf_vtp_start_value, tvb, offset, 2, ENC_BIG_ENDIAN);
break;
case JOIN_MSG:
offset += 1; /* skip reserved/unused field */
proto_tree_add_item(vtp_tree, hf_vtp_md_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
proto_tree_add_item(vtp_tree, hf_vtp_md, tvb, offset, 32, ENC_ASCII|ENC_NA);
offset += 32;
proto_tree_add_item(vtp_tree, hf_vtp_pruning_first_vid, tvb, offset, 2, ENC_BIG_ENDIAN);
pruning_vlan_id = tvb_get_ntohs(tvb, offset);
offset += 2;
proto_tree_add_item(vtp_tree, hf_vtp_pruning_last_vid, tvb, offset,
2, ENC_BIG_ENDIAN);
offset += 2;
vtp_pruning_tree = proto_tree_add_subtree(vtp_tree, tvb, offset, -1,
ett_vtp_pruning, NULL, "Advertised active (i.e. not pruned) VLANs");
while (tvb_reported_length_remaining(tvb, offset) > 0) {
guint8 vlan_usage_bitmap;
int shift;
vlan_usage_bitmap = tvb_get_guint8(tvb, offset);
for (shift = 0; shift < 8; shift++) {
if (vlan_usage_bitmap & (1<<7)) {
proto_tree_add_uint(vtp_pruning_tree, hf_vtp_pruning_active_vid,
tvb, offset, 1, pruning_vlan_id);
}
pruning_vlan_id += 1;
vlan_usage_bitmap <<= 1;
}
offset += 1;
}
break;
}
return tvb_captured_length(tvb);
}
#define VLAN_SUSPENDED 0x01
static const value_string vlan_type_vals[] = {
{ 0x01, "Ethernet" },
{ 0x02, "FDDI" },
{ 0x03, "TrCRF" },
{ 0x04, "FDDI-net" },
{ 0x05, "TrBRF" },
{ 0, NULL },
};
#define SR_RING_NUM 0x01
#define SR_BRIDGE_NUM 0x02
#define STP_TYPE 0x03
#define PARENT_VLAN 0x04
#define TR_BRIDGED_VLANS 0x05
#define PRUNING 0x06
#define BRIDGE_TYPE 0x07
#define MAX_ARE_HOP_CNT 0x08
#define MAX_STE_HOP_CNT 0x09
#define BACKUP_CRF_MODE 0x0A
static const value_string vlan_tlv_type_vals[] = {
{ SR_RING_NUM, "Source-Routing Ring Number" },
{ SR_BRIDGE_NUM, "Source-Routing Bridge Number" },
{ STP_TYPE, "Spanning-Tree Protocol Type" },
{ PARENT_VLAN, "Parent VLAN" },
{ TR_BRIDGED_VLANS, "Translationally Bridged VLANs" },
{ PRUNING, "Pruning" },
{ BRIDGE_TYPE, "Bridge Type" },
{ MAX_ARE_HOP_CNT, "Max ARE Hop Count" },
{ MAX_STE_HOP_CNT, "Max STE Hop Count" },
{ BACKUP_CRF_MODE, "Backup CRF Mode" },
{ 0, NULL },
};
static int
dissect_vlan_info(tvbuff_t *tvb, packet_info *pinfo, int offset, proto_tree *tree)
{
proto_item *ti;
proto_tree *vlan_info_tree;
proto_tree *status_tree;
guint8 vlan_info_len;
int vlan_info_left;
guint8 status;
guint8 vlan_name_len;
guint8 type;
int length;
proto_tree *tlv_tree;
vlan_info_len = tvb_get_guint8(tvb, offset);
vlan_info_tree = proto_tree_add_subtree(tree, tvb, offset, vlan_info_len,
ett_vtp_vlan_info, NULL, "VLAN Information");
vlan_info_left = vlan_info_len;
proto_tree_add_uint(vlan_info_tree, hf_vtp_vlan_info_len, tvb, offset, 1,
vlan_info_len);
offset += 1;
vlan_info_left -= 1;
status = tvb_get_guint8(tvb, offset);
ti = proto_tree_add_uint(vlan_info_tree, hf_vtp_vlan_status, tvb, offset, 1, status);
if (status & VLAN_SUSPENDED)
proto_item_append_text(ti, " (VLAN suspended)");
status_tree = proto_item_add_subtree(ti, ett_vtp_vlan_status);
proto_tree_add_boolean(status_tree, hf_vtp_vlan_status_vlan_susp, tvb, offset, 1,
status);
offset += 1;
vlan_info_left -= 1;
proto_tree_add_item(vlan_info_tree, hf_vtp_vlan_type, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
vlan_info_left -= 1;
vlan_name_len = tvb_get_guint8(tvb, offset);
proto_tree_add_item(vlan_info_tree, hf_vtp_vlan_name_len, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
vlan_info_left -= 1;
proto_tree_add_item(vlan_info_tree, hf_vtp_isl_vlan_id, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
vlan_info_left -= 2;
proto_tree_add_item(vlan_info_tree, hf_vtp_mtu_size, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
vlan_info_left -= 2;
proto_tree_add_item(vlan_info_tree, hf_vtp_802_10_index, tvb, offset, 4, ENC_BIG_ENDIAN);
offset += 4;
vlan_info_left -= 4;
/* VLAN name length appears to be rounded up to a multiple of 4. */
vlan_name_len = 4*((vlan_name_len + 3)/4);
proto_tree_add_item(vlan_info_tree, hf_vtp_vlan_name, tvb, offset, vlan_name_len, ENC_ASCII|ENC_NA);
offset += vlan_name_len;
vlan_info_left -= vlan_name_len;
while (vlan_info_left > 0) {
type = tvb_get_guint8(tvb, offset + 0);
length = tvb_get_guint8(tvb, offset + 1);
tlv_tree = proto_tree_add_subtree(vlan_info_tree, tvb, offset,
2 + length*2, ett_vtp_tlv, &ti,
val_to_str(type, vlan_tlv_type_vals,
"Unknown TLV type: 0x%02x"));
proto_tree_add_item(tlv_tree, hf_vtp_vlan_tlvtype, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(tlv_tree, hf_vtp_vlan_tlvlength, tvb, offset+1, 1, ENC_BIG_ENDIAN);
offset += 2;
vlan_info_left -= 2;
if (length > 0) {
dissect_vlan_info_tlv(tvb, pinfo, offset, length*2, tlv_tree,
ti, type);
}
offset += length*2;
vlan_info_left -= length*2;
}
return vlan_info_len;
}
static const value_string stp_type_vals[] = {
{ 1, "SRT" },
{ 2, "SRB" },
{ 3, "Auto" },
{ 0, NULL },
};
static const value_string pruning_vals[] = {
{ 1, "Enabled" },
{ 2, "Disabled" },
{ 0, NULL },
};
static const value_string bridge_type_vals[] = {
{ 1, "SRT" },
{ 2, "SRB" },
{ 0, NULL },
};
static const value_string backup_crf_mode_vals[] = {
{ 1, "TrCRF is configured as a backup" },
{ 2, "TrCRF is not configured as a backup" },
{ 0, NULL },
};
static void
dissect_vlan_info_tlv(tvbuff_t *tvb, packet_info *pinfo, int offset, int length,
proto_tree *tree, proto_item *ti, guint8 type)
{
switch (type) {
case SR_RING_NUM:
if (length == 2) {
proto_tree_add_item(tree, hf_vtp_vlan_src_route_ring_num, tvb, offset, 2, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_vtp_vlan_tlvlength_bad, "Source-Routing Ring Number: Bad length %u", length);
}
break;
case SR_BRIDGE_NUM:
if (length == 2) {
proto_tree_add_item(tree, hf_vtp_vlan_src_route_bridge_num, tvb, offset, 2, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_vtp_vlan_tlvlength_bad, "Source-Routing Bridge Number: Bad length %u", length);
}
break;
case STP_TYPE:
if (length == 2) {
proto_tree_add_item(tree, hf_vtp_vlan_stp_type, tvb, offset, 2, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_vtp_vlan_tlvlength_bad, "Spanning-Tree Protocol Type: Bad length %u", length);
}
break;
case PARENT_VLAN:
if (length == 2) {
proto_tree_add_item(tree, hf_vtp_vlan_parent_vlan, tvb, offset, 2, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_vtp_vlan_tlvlength_bad, "Parent VLAN: Bad length %u", length);
}
break;
case TR_BRIDGED_VLANS:
if (length == 2) {
proto_tree_add_item(tree, hf_vtp_vlan_translationally_bridged_vlans, tvb, offset, 2, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_vtp_vlan_tlvlength_bad, "Translationally Bridged VLANs: Bad length %u", length);
}
break;
case PRUNING:
if (length == 2) {
proto_tree_add_item(tree, hf_vtp_vlan_pruning, tvb, offset, 2, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_vtp_vlan_tlvlength_bad, "Pruning: Bad length %u", length);
}
break;
case BRIDGE_TYPE:
if (length == 2) {
proto_tree_add_item(tree, hf_vtp_vlan_bridge_type, tvb, offset, 2, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_vtp_vlan_tlvlength_bad, "Bridge Type: Bad length %u", length);
}
break;
case MAX_ARE_HOP_CNT:
if (length == 2) {
proto_tree_add_item(tree, hf_vtp_vlan_max_are_hop_count, tvb, offset, 2, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_vtp_vlan_tlvlength_bad, "Max ARE Hop Count: Bad length %u", length);
}
break;
case MAX_STE_HOP_CNT:
if (length == 2) {
proto_tree_add_item(tree, hf_vtp_vlan_max_ste_hop_count, tvb, offset, 2, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_vtp_vlan_tlvlength_bad, "Max STE Hop Count: Bad length %u", length);
}
break;
case BACKUP_CRF_MODE:
if (length == 2) {
proto_tree_add_item(tree, hf_vtp_vlan_backup_crf_mode, tvb, offset, 2, ENC_BIG_ENDIAN);
} else {
expert_add_info_format(pinfo, ti, &ei_vtp_vlan_tlvlength_bad, "Backup CRF Mode: Bad length %u", length);
}
break;
default:
proto_tree_add_item(tree, hf_vtp_vlan_data, tvb, offset, length, ENC_NA);
break;
}
}
void
proto_register_vtp(void)
{
static hf_register_info hf[] = {
{ &hf_vtp_version,
{ "Version", "vtp.version", FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_vtp_code,
{ "Code", "vtp.code", FT_UINT8, BASE_HEX, VALS(type_vals), 0x0,
NULL, HFILL }},
{ &hf_vtp_followers,
{ "Followers", "vtp.followers", FT_UINT8, BASE_DEC, NULL, 0x0,
"Number of following Subset-Advert messages", HFILL }},
{ &hf_vtp_md_len,
{ "Management Domain Length", "vtp.md_len", FT_UINT8, BASE_DEC, NULL, 0x0,
"Length of management domain string", HFILL }},
{ &hf_vtp_md,
{ "Management Domain", "vtp.md", FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_vtp_conf_rev_num,
{ "Configuration Revision Number", "vtp.conf_rev_num", FT_UINT32, BASE_DEC, NULL, 0x0,
"Revision number of the configuration information", HFILL }},
{ &hf_vtp_upd_id,
{ "Updater Identity", "vtp.upd_id", FT_IPv4, BASE_NONE, NULL, 0x0,
"IP address of the updater", HFILL }},
{ &hf_vtp_upd_ts,
{ "Update Timestamp", "vtp.upd_ts", FT_STRING, BASE_NONE, NULL, 0,
"Time stamp of the current configuration revision", HFILL }},
{ &hf_vtp_md5_digest,
{ "MD5 Digest", "vtp.md5_digest", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_vtp_seq_num,
{ "Sequence Number", "vtp.seq_num", FT_UINT8, BASE_DEC, NULL, 0x0,
"Order of this frame in the sequence of Subset-Advert frames", HFILL }},
{ &hf_vtp_start_value,
{ "Start Value", "vtp.start_value", FT_UINT16, BASE_HEX, NULL, 0x0,
"Virtual LAN ID of first VLAN for which information is requested", HFILL }},
{ &hf_vtp_vlan_info_len,
{ "VLAN Information Length", "vtp.vlan_info.len", FT_UINT8, BASE_DEC, NULL, 0x0,
"Length of the VLAN information field", HFILL }},
{ &hf_vtp_vlan_status,
{ "Status", "vtp.vlan_info.status", FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_vtp_vlan_status_vlan_susp,
{ "VLAN suspended", "vtp.vlan_info.status.vlan_susp", FT_BOOLEAN, 8, NULL, VLAN_SUSPENDED,
NULL, HFILL }},
{ &hf_vtp_vlan_type,
{ "VLAN Type", "vtp.vlan_info.vlan_type", FT_UINT8, BASE_HEX, VALS(vlan_type_vals), 0x0,
"Type of VLAN", HFILL }},
{ &hf_vtp_vlan_name_len,
{ "VLAN Name Length", "vtp.vlan_info.vlan_name_len", FT_UINT8, BASE_DEC, NULL, 0x0,
"Length of VLAN name string", HFILL }},
{ &hf_vtp_isl_vlan_id,
{ "ISL VLAN ID", "vtp.vlan_info.isl_vlan_id", FT_UINT16, BASE_HEX, NULL, 0x0,
"ID of this VLAN on ISL trunks", HFILL }},
{ &hf_vtp_mtu_size,
{ "MTU Size", "vtp.vlan_info.mtu_size", FT_UINT16, BASE_DEC, NULL, 0x0,
"MTU for this VLAN", HFILL }},
{ &hf_vtp_802_10_index,
{ "802.10 Index", "vtp.vlan_info.802_10_index", FT_UINT32, BASE_HEX, NULL, 0x0,
"IEEE 802.10 security association identifier for this VLAN", HFILL }},
{ &hf_vtp_vlan_name,
{ "VLAN Name", "vtp.vlan_info.vlan_name", FT_STRING, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_vtp_vlan_tlvtype,
{ "Type", "vtp.vlan_info.tlv_type", FT_UINT8, BASE_HEX, VALS(vlan_tlv_type_vals), 0x0,
NULL, HFILL }},
{ &hf_vtp_vlan_tlvlength,
{ "Length", "vtp.vlan_info.tlv_len", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_vtp_pruning_first_vid,
{ "First VLAN ID", "vtp.pruning.first", FT_UINT16, BASE_DEC, NULL, 0x0,
"First VLAN ID for which pruning information is present", HFILL }},
{ &hf_vtp_pruning_last_vid,
{ "Last VLAN ID", "vtp.pruning.last", FT_UINT16, BASE_DEC, NULL, 0x0,
"Last VLAN ID for which pruning information is present", HFILL }},
{ &hf_vtp_pruning_active_vid,
{ "VLAN", "vtp.pruning.active", FT_UINT16, BASE_DEC, NULL, 0x0,
"Active advertised VLAN ID", HFILL }},
{ &hf_vtp_vlan_src_route_ring_num,
{ "Source-Routing Ring Number", "vtp.vlan_info.src_route_ring_num", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_vtp_vlan_src_route_bridge_num,
{ "Source-Routing Bridge Number", "vtp.vlan_info.src_route_bridge_num", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_vtp_vlan_stp_type,
{ "Spanning-Tree Protocol Type", "vtp.vlan_info.stp_type", FT_UINT16, BASE_HEX, VALS(stp_type_vals), 0x0,
NULL, HFILL }},
{ &hf_vtp_vlan_parent_vlan,
{ "Parent VLAN", "vtp.vlan_info.parent_vlan", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_vtp_vlan_translationally_bridged_vlans,
{ "Translationally Bridged VLANs", "vtp.vlan_info.translationally_bridged_vlans", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_vtp_vlan_pruning,
{ "Pruning", "vtp.vlan_info.pruning", FT_UINT16, BASE_HEX, VALS(pruning_vals), 0x0,
NULL, HFILL }},
{ &hf_vtp_vlan_bridge_type,
{ "Bridge Type", "vtp.vlan_info.bridge_type", FT_UINT16, BASE_HEX, VALS(bridge_type_vals), 0x0,
NULL, HFILL }},
{ &hf_vtp_vlan_max_are_hop_count,
{ "Max ARE Hop Count", "vtp.vlan_info.max_are_hop_count", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_vtp_vlan_max_ste_hop_count,
{ "Max STE Hop Count", "vtp.vlan_info.max_ste_hop_count", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_vtp_vlan_backup_crf_mode,
{ "Backup CRF Mode", "vtp.vlan_info.backup_crf_mode", FT_UINT16, BASE_HEX, VALS(backup_crf_mode_vals), 0x0,
NULL, HFILL }},
{ &hf_vtp_vlan_data,
{ "Data", "vtp.vlan_info.data", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
};
static gint *ett[] = {
&ett_vtp,
&ett_vtp_vlan_info,
&ett_vtp_vlan_status,
&ett_vtp_tlv,
&ett_vtp_pruning,
};
static ei_register_info ei[] = {
{ &ei_vtp_vlan_tlvlength_bad, { "vtp.vlan_info.tlv_len.bad", PI_PROTOCOL, PI_WARN, "Bad length for TLV length", EXPFILL }},
};
expert_module_t* expert_vtp;
proto_vtp = proto_register_protocol("VLAN Trunking Protocol", "VTP", "vtp");
proto_register_field_array(proto_vtp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_vtp = expert_register_protocol(proto_vtp);
expert_register_field_array(expert_vtp, ei, array_length(ei));
}
void
proto_reg_handoff_vtp(void)
{
dissector_handle_t vtp_handle;
vtp_handle = create_dissector_handle(dissect_vtp, proto_vtp);
dissector_add_uint("llc.cisco_pid", 0x2003, vtp_handle);
}
/*
* Editor modelines - http://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/