eb0bbf105a
- Put back the hf_ variables removed from the last patch - Change the verbose protocol name to the (now) official spelling "VLAN Trunking Protocol" instead of "Virtual Trunk Protocol" - Made the "Info" column more informative by placing the message type and selected key information into it, instead of just the verbose protocol name - Corrected an error in the handling of the Advert-Request message where the Management Domain Name field was not parsed properly, resulting in wrong parsing of the remainder of the entire Advert-Request message svn path=/trunk/; revision=37056
779 lines
22 KiB
C
779 lines
22 KiB
C
/* packet-vtp.c
|
|
* Routines for the disassembly of Cisco's VLAN Trunking Protocol
|
|
*
|
|
* $Id$
|
|
*
|
|
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <glib.h>
|
|
#include <epan/packet.h>
|
|
|
|
/*
|
|
* See
|
|
*
|
|
* http://www.cisco.com/univercd/cc/td/doc/product/lan/trsrb/frames.htm
|
|
*
|
|
* for some information on VTP.
|
|
*
|
|
* It's incomplete, and it appears to be inaccurate in a number of places,
|
|
* but it's all I could find....
|
|
*/
|
|
|
|
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_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 gint hf_vtp_pruning_first_vid = -1;
|
|
static gint hf_vtp_pruning_last_vid = -1;
|
|
static gint hf_vtp_pruning_active_vid = -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 int
|
|
dissect_vlan_info(tvbuff_t *tvb, int offset, proto_tree *tree);
|
|
static void
|
|
dissect_vlan_info_tlv(tvbuff_t *tvb, 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 void
|
|
dissect_vtp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *vtp_tree = NULL, *vtp_pruning_tree = NULL;
|
|
int offset = 0;
|
|
guint8 code;
|
|
guint8 md_len;
|
|
const 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);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_vtp, tvb, offset, -1,
|
|
FALSE);
|
|
vtp_tree = proto_item_add_subtree(ti, ett_vtp);
|
|
|
|
proto_tree_add_item(vtp_tree, hf_vtp_version, tvb, offset, 1,
|
|
FALSE);
|
|
offset += 1;
|
|
|
|
code = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint(vtp_tree, hf_vtp_code, tvb, offset, 1,
|
|
code);
|
|
offset += 1;
|
|
|
|
switch (code) {
|
|
|
|
case SUMMARY_ADVERT:
|
|
proto_tree_add_item(vtp_tree, hf_vtp_followers, tvb, offset,
|
|
1, FALSE);
|
|
offset += 1;
|
|
|
|
md_len = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint(vtp_tree, hf_vtp_md_len, tvb, offset,
|
|
1, md_len);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(vtp_tree, hf_vtp_md, tvb, offset,
|
|
32, FALSE);
|
|
offset += 32;
|
|
|
|
proto_tree_add_item(vtp_tree, hf_vtp_conf_rev_num, tvb,
|
|
offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(vtp_tree, hf_vtp_upd_id, tvb,
|
|
offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
upd_timestamp = tvb_get_ptr(tvb, offset, 12);
|
|
proto_tree_add_string_format(vtp_tree, hf_vtp_upd_ts, tvb,
|
|
offset, 12, (gchar*)upd_timestamp,
|
|
"Update 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, FALSE);
|
|
break;
|
|
|
|
case SUBSET_ADVERT:
|
|
proto_tree_add_item(vtp_tree, hf_vtp_seq_num, tvb, offset,
|
|
1, FALSE);
|
|
offset += 1;
|
|
|
|
md_len = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint(vtp_tree, hf_vtp_md_len, tvb, offset,
|
|
1, md_len);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(vtp_tree, hf_vtp_md, tvb, offset,
|
|
32, FALSE);
|
|
offset += 32;
|
|
|
|
proto_tree_add_item(vtp_tree, hf_vtp_conf_rev_num, tvb,
|
|
offset, 4, FALSE);
|
|
offset += 4;
|
|
|
|
while (tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
vlan_info_len =
|
|
dissect_vlan_info(tvb, offset, vtp_tree);
|
|
if (vlan_info_len < 0)
|
|
break;
|
|
offset += vlan_info_len;
|
|
}
|
|
break;
|
|
|
|
case ADVERT_REQUEST:
|
|
offset += 1; /* skip reserved field */
|
|
|
|
md_len = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint(vtp_tree, hf_vtp_md_len, tvb, offset,
|
|
1, md_len);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(vtp_tree, hf_vtp_md, tvb, offset,
|
|
32, FALSE);
|
|
offset += 32;
|
|
|
|
proto_tree_add_item(vtp_tree, hf_vtp_start_value, tvb,
|
|
offset, 2, FALSE);
|
|
break;
|
|
|
|
case JOIN_MSG:
|
|
offset += 1; /* skip reserved/unused field */
|
|
|
|
md_len = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint(vtp_tree, hf_vtp_md_len, tvb, offset,
|
|
1, md_len);
|
|
offset += 1;
|
|
|
|
proto_tree_add_item(vtp_tree, hf_vtp_md, tvb, offset,
|
|
32, FALSE);
|
|
offset += 32;
|
|
|
|
proto_tree_add_item(vtp_tree, hf_vtp_pruning_first_vid, tvb, offset,
|
|
2, FALSE);
|
|
pruning_vlan_id = tvb_get_ntohs(tvb, offset);
|
|
offset += 2;
|
|
|
|
proto_tree_add_item(vtp_tree, hf_vtp_pruning_last_vid, tvb, offset,
|
|
2, FALSE);
|
|
offset += 2;
|
|
|
|
ti = proto_tree_add_text (vtp_tree, tvb, offset, -1,
|
|
"Advertised active (i.e. not pruned) VLANs");
|
|
vtp_pruning_tree = proto_item_add_subtree(ti, ett_vtp_pruning);
|
|
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
#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, 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);
|
|
ti = proto_tree_add_text(tree, tvb, offset, vlan_info_len,
|
|
"VLAN Information");
|
|
vlan_info_tree = proto_item_add_subtree(ti, ett_vtp_vlan_info);
|
|
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;
|
|
|
|
if (vlan_info_left < 1)
|
|
return -1;
|
|
status = tvb_get_guint8(tvb, offset);
|
|
ti = proto_tree_add_text(vlan_info_tree, tvb, offset, 1,
|
|
"Status: 0x%02x%s", status,
|
|
(status & VLAN_SUSPENDED) ? "(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;
|
|
|
|
if (vlan_info_left < 1)
|
|
return -1;
|
|
proto_tree_add_item(vlan_info_tree, hf_vtp_vlan_type, tvb, offset, 1,
|
|
FALSE);
|
|
offset += 1;
|
|
vlan_info_left -= 1;
|
|
|
|
if (vlan_info_left < 1)
|
|
return -1;
|
|
vlan_name_len = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint(vlan_info_tree, hf_vtp_vlan_name_len, tvb, offset, 1,
|
|
vlan_name_len);
|
|
offset += 1;
|
|
vlan_info_left -= 1;
|
|
|
|
if (vlan_info_left < 2)
|
|
return -1;
|
|
proto_tree_add_item(vlan_info_tree, hf_vtp_isl_vlan_id, tvb, offset, 2,
|
|
FALSE);
|
|
offset += 2;
|
|
vlan_info_left -= 2;
|
|
|
|
if (vlan_info_left < 2)
|
|
return -1;
|
|
proto_tree_add_item(vlan_info_tree, hf_vtp_mtu_size, tvb, offset, 2,
|
|
FALSE);
|
|
offset += 2;
|
|
vlan_info_left -= 2;
|
|
|
|
if (vlan_info_left < 4)
|
|
return -1;
|
|
proto_tree_add_item(vlan_info_tree, hf_vtp_802_10_index, tvb, offset, 4,
|
|
FALSE);
|
|
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);
|
|
if (vlan_info_left < vlan_name_len)
|
|
return -1;
|
|
proto_tree_add_item(vlan_info_tree, hf_vtp_vlan_name, tvb, offset,
|
|
vlan_name_len, FALSE);
|
|
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);
|
|
|
|
ti = proto_tree_add_text(vlan_info_tree, tvb, offset,
|
|
2 + length*2, "%s",
|
|
val_to_str(type, vlan_tlv_type_vals,
|
|
"Unknown TLV type: 0x%02x"));
|
|
tlv_tree = proto_item_add_subtree(ti, ett_vtp_tlv);
|
|
proto_tree_add_uint(tlv_tree, hf_vtp_vlan_tlvtype, tvb, offset,
|
|
1, type);
|
|
proto_tree_add_uint(tlv_tree, hf_vtp_vlan_tlvlength, tvb, offset+1,
|
|
1, length);
|
|
offset += 2;
|
|
vlan_info_left -= 2;
|
|
if (length > 0) {
|
|
dissect_vlan_info_tlv(tvb, 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, int offset, int length,
|
|
proto_tree *tree, proto_item *ti, guint8 type)
|
|
{
|
|
switch (type) {
|
|
|
|
case SR_RING_NUM:
|
|
if (length == 2) {
|
|
proto_item_set_text(ti,
|
|
"Source-Routing Ring Number: 0x%04x",
|
|
tvb_get_ntohs(tvb, offset));
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Source-Routing Ring Number: 0x%04x",
|
|
tvb_get_ntohs(tvb, offset));
|
|
} else {
|
|
proto_item_set_text(ti,
|
|
"Source-Routing Ring Number: Bad length %u",
|
|
length);
|
|
proto_tree_add_text(tree, tvb, offset, length,
|
|
"Source-Routing Ring Number: Bad length %u",
|
|
length);
|
|
}
|
|
break;
|
|
|
|
case SR_BRIDGE_NUM:
|
|
if (length == 2) {
|
|
proto_item_set_text(ti,
|
|
"Source-Routing Bridge Number: 0x%04x",
|
|
tvb_get_ntohs(tvb, offset));
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Source-Routing Bridge Number: 0x%04x",
|
|
tvb_get_ntohs(tvb, offset));
|
|
} else {
|
|
proto_item_set_text(ti,
|
|
"Source-Routing Bridge Number: Bad length %u",
|
|
length);
|
|
proto_tree_add_text(tree, tvb, offset, length,
|
|
"Source-Routing Bridge Number: Bad length %u",
|
|
length);
|
|
}
|
|
break;
|
|
|
|
case STP_TYPE:
|
|
if (length == 2) {
|
|
proto_item_set_text(ti,
|
|
"Spanning-Tree Protocol Type: %s",
|
|
val_to_str(tvb_get_ntohs(tvb, offset), stp_type_vals,
|
|
"Unknown (0x%04x)"));
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Spanning-Tree Protocol Type: %s",
|
|
val_to_str(tvb_get_ntohs(tvb, offset), stp_type_vals,
|
|
"Unknown (0x%04x)"));
|
|
} else {
|
|
proto_item_set_text(ti,
|
|
"Spanning-Tree Protocol Type: Bad length %u",
|
|
length);
|
|
proto_tree_add_text(tree, tvb, offset, length,
|
|
"Spanning-Tree Protocol Type: Bad length %u",
|
|
length);
|
|
}
|
|
break;
|
|
|
|
case PARENT_VLAN:
|
|
if (length == 2) {
|
|
proto_item_set_text(ti,
|
|
"Parent VLAN: 0x%04x",
|
|
tvb_get_ntohs(tvb, offset));
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Parent VLAN: 0x%04x",
|
|
tvb_get_ntohs(tvb, offset));
|
|
} else {
|
|
proto_item_set_text(ti,
|
|
"Parent VLAN: Bad length %u",
|
|
length);
|
|
proto_tree_add_text(tree, tvb, offset, length,
|
|
"Parent VLAN: Bad length %u",
|
|
length);
|
|
}
|
|
break;
|
|
|
|
case TR_BRIDGED_VLANS:
|
|
if (length == 2) {
|
|
proto_item_set_text(ti,
|
|
"Translationally Bridged VLANs: 0x%04x",
|
|
tvb_get_ntohs(tvb, offset));
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Translationally Bridged VLANs: 0x%04x",
|
|
tvb_get_ntohs(tvb, offset));
|
|
} else {
|
|
proto_item_set_text(ti,
|
|
"Translationally Bridged VLANs: Bad length %u",
|
|
length);
|
|
proto_tree_add_text(tree, tvb, offset, length,
|
|
"Translationally Bridged VLANs: Bad length %u",
|
|
length);
|
|
}
|
|
break;
|
|
|
|
case PRUNING:
|
|
if (length == 2) {
|
|
proto_item_set_text(ti,
|
|
"Pruning: %s",
|
|
val_to_str(tvb_get_ntohs(tvb, offset), pruning_vals,
|
|
"Unknown (0x%04x)"));
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Pruning: %s",
|
|
val_to_str(tvb_get_ntohs(tvb, offset), pruning_vals,
|
|
"Unknown (0x%04x)"));
|
|
} else {
|
|
proto_item_set_text(ti,
|
|
"Pruning: Bad length %u",
|
|
length);
|
|
proto_tree_add_text(tree, tvb, offset, length,
|
|
"Pruning: Bad length %u",
|
|
length);
|
|
}
|
|
break;
|
|
|
|
case BRIDGE_TYPE:
|
|
if (length == 2) {
|
|
proto_item_set_text(ti,
|
|
"Bridge Type: %s",
|
|
val_to_str(tvb_get_ntohs(tvb, offset), bridge_type_vals,
|
|
"Unknown (0x%04x)"));
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Bridge Type: %s",
|
|
val_to_str(tvb_get_ntohs(tvb, offset), bridge_type_vals,
|
|
"Unknown (0x%04x)"));
|
|
} else {
|
|
proto_item_set_text(ti,
|
|
"Bridge Type: Bad length %u",
|
|
length);
|
|
proto_tree_add_text(tree, tvb, offset, length,
|
|
"Bridge Type: Bad length %u",
|
|
length);
|
|
}
|
|
break;
|
|
|
|
case MAX_ARE_HOP_CNT:
|
|
if (length == 2) {
|
|
proto_item_set_text(ti,
|
|
"Max ARE Hop Count: %u",
|
|
tvb_get_ntohs(tvb, offset));
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Max ARE Hop Count: %u",
|
|
tvb_get_ntohs(tvb, offset));
|
|
} else {
|
|
proto_item_set_text(ti,
|
|
"Max ARE Hop Count: Bad length %u",
|
|
length);
|
|
proto_tree_add_text(tree, tvb, offset, length,
|
|
"Max ARE Hop Count: Bad length %u",
|
|
length);
|
|
}
|
|
break;
|
|
|
|
case MAX_STE_HOP_CNT:
|
|
if (length == 2) {
|
|
proto_item_set_text(ti,
|
|
"Max STE Hop Count: %u",
|
|
tvb_get_ntohs(tvb, offset));
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Max STE Hop Count: %u",
|
|
tvb_get_ntohs(tvb, offset));
|
|
} else {
|
|
proto_item_set_text(ti,
|
|
"Max STE Hop Count: Bad length %u",
|
|
length);
|
|
proto_tree_add_text(tree, tvb, offset, length,
|
|
"Max STE Hop Count: Bad length %u",
|
|
length);
|
|
}
|
|
break;
|
|
|
|
case BACKUP_CRF_MODE:
|
|
if (length == 2) {
|
|
proto_item_set_text(ti,
|
|
"Backup CRF Mode: %s",
|
|
val_to_str(tvb_get_ntohs(tvb, offset), backup_crf_mode_vals,
|
|
"Unknown (0x%04x)"));
|
|
proto_tree_add_text(tree, tvb, offset, 2,
|
|
"Backup CRF Mode: %s",
|
|
val_to_str(tvb_get_ntohs(tvb, offset), backup_crf_mode_vals,
|
|
"Unknown (0x%04x)"));
|
|
} else {
|
|
proto_item_set_text(ti,
|
|
"Backup CRF Mode: Bad length %u",
|
|
length);
|
|
proto_tree_add_text(tree, tvb, offset, length,
|
|
"Backup CRF Mode: Bad length %u",
|
|
length);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_text(tree, tvb, offset, length, "Data");
|
|
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_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 }},
|
|
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_vtp,
|
|
&ett_vtp_vlan_info,
|
|
&ett_vtp_vlan_status,
|
|
&ett_vtp_tlv,
|
|
&ett_vtp_pruning,
|
|
};
|
|
|
|
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));
|
|
}
|
|
|
|
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);
|
|
}
|