![Guy Harris](/assets/img/avatar_default.png)
widening formal arguments or narrowing variables passed as actual arguments. svn path=/trunk/; revision=2993
703 lines
19 KiB
C
703 lines
19 KiB
C
/* packet-vtp.c
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* Routines for the disassembly of Cisco's Virtual Trunking Protocol
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*
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* $Id: packet-vtp.c,v 1.12 2001/02/05 02:47:31 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include "packet.h"
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/*
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* See
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*
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* http://www.cisco.com/univercd/cc/td/doc/product/lan/trsrb/frames.htm
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*
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* for some information on VTP.
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*
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* It's incomplete, and it appears to be inaccurate in a number of places,
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* but it's all I could find....
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*/
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static int proto_vtp = -1;
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static int hf_vtp_version = -1;
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static int hf_vtp_code = -1;
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static int hf_vtp_followers = -1;
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static int hf_vtp_md_len = -1;
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static int hf_vtp_md = -1;
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static int hf_vtp_conf_rev_num = -1;
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static int hf_vtp_upd_id = -1;
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static int hf_vtp_upd_ts = -1;
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static int hf_vtp_md5_digest = -1;
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static int hf_vtp_seq_num = -1;
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static int hf_vtp_start_value = -1;
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static int hf_vtp_vlan_info_len = -1;
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static int hf_vtp_vlan_status_vlan_susp = -1;
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static int hf_vtp_vlan_type = -1;
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static int hf_vtp_vlan_name_len = -1;
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static int hf_vtp_isl_vlan_id = -1;
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static int hf_vtp_mtu_size = -1;
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static int hf_vtp_802_10_index = -1;
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static int hf_vtp_vlan_name = -1;
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static int hf_vtp_vlan_tlvtype = -1;
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static int hf_vtp_vlan_tlvlength = -1;
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static gint ett_vtp = -1;
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static gint ett_vtp_vlan_info = -1;
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static gint ett_vtp_vlan_status = -1;
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static gint ett_vtp_tlv = -1;
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static int
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dissect_vlan_info(tvbuff_t *tvb, int offset, proto_tree *tree);
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static void
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dissect_vlan_info_tlv(tvbuff_t *tvb, int offset, int length,
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proto_tree *tree, proto_item *ti, guint8 type);
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#define SUMMARY_ADVERT 0x01
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#define SUBSET_ADVERT 0x02
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#define ADVERT_REQUEST 0x03
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static const value_string type_vals[] = {
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{ SUMMARY_ADVERT, "Summary-Advert" },
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{ SUBSET_ADVERT, "Subset-Advert" },
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{ ADVERT_REQUEST, "Advert-Request" },
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{ 0, NULL },
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};
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static void
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dissect_vtp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_item *ti;
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proto_tree *vtp_tree = NULL;
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int offset = 0;
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guint8 code;
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guint8 md_len;
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guint8 *upd_timestamp;
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int vlan_info_len;
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_set_str(pinfo->fd, COL_PROTOCOL, "VTP");
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if (check_col(pinfo->fd, COL_INFO))
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col_set_str(pinfo->fd, COL_INFO, "Virtual Trunking Protocol");
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if (tree) {
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ti = proto_tree_add_item(tree, proto_vtp, tvb, offset,
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tvb_length_remaining(tvb, offset), FALSE);
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vtp_tree = proto_item_add_subtree(ti, ett_vtp);
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proto_tree_add_item(vtp_tree, hf_vtp_version, tvb, offset, 1,
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FALSE);
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offset += 1;
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code = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(vtp_tree, hf_vtp_code, tvb, offset, 1,
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code);
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offset += 1;
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switch (code) {
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case SUMMARY_ADVERT:
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proto_tree_add_item(vtp_tree, hf_vtp_followers, tvb, offset,
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1, FALSE);
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offset += 1;
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md_len = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(vtp_tree, hf_vtp_md_len, tvb, offset,
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1, md_len);
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offset += 1;
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proto_tree_add_item(vtp_tree, hf_vtp_md, tvb, offset,
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32, FALSE);
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offset += 32;
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proto_tree_add_item(vtp_tree, hf_vtp_conf_rev_num, tvb,
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offset, 4, FALSE);
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offset += 4;
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proto_tree_add_item(vtp_tree, hf_vtp_upd_id, tvb,
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offset, 4, FALSE);
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offset += 4;
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upd_timestamp = tvb_get_ptr(tvb, offset, 12);
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proto_tree_add_string_format(vtp_tree, hf_vtp_upd_ts, tvb,
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offset, 12, upd_timestamp,
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"Update Timestamp: %.2s-%.2s-%.2s %.2s:%.2s:%.2s",
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&upd_timestamp[0], &upd_timestamp[2], &upd_timestamp[4],
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&upd_timestamp[6], &upd_timestamp[8], &upd_timestamp[10]);
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offset += 12;
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proto_tree_add_item(vtp_tree, hf_vtp_md5_digest, tvb,
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offset, 16, FALSE);
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break;
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case SUBSET_ADVERT:
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proto_tree_add_item(vtp_tree, hf_vtp_seq_num, tvb, offset,
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1, FALSE);
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offset += 1;
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md_len = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(vtp_tree, hf_vtp_md_len, tvb, offset,
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1, md_len);
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offset += 1;
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proto_tree_add_item(vtp_tree, hf_vtp_md, tvb, offset,
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32, FALSE);
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offset += 32;
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proto_tree_add_item(vtp_tree, hf_vtp_conf_rev_num, tvb,
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offset, 4, FALSE);
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offset += 4;
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while (tvb_reported_length_remaining(tvb, offset) > 0) {
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vlan_info_len =
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dissect_vlan_info(tvb, offset, vtp_tree);
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if (vlan_info_len < 0)
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break;
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offset += vlan_info_len;
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}
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break;
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case ADVERT_REQUEST:
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offset += 1; /* skip reserved field */
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md_len = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(vtp_tree, hf_vtp_md_len, tvb, offset,
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1, md_len);
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offset += 1;
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proto_tree_add_item(vtp_tree, hf_vtp_start_value, tvb,
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offset, 2, FALSE);
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break;
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case 0x04:
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/*
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* Mysterious type, seen a lot.
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* Is this some mutant variant of Advert-Request?
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*/
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offset += 1; /* skip unknown field */
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md_len = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(vtp_tree, hf_vtp_md_len, tvb, offset,
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1, md_len);
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offset += 1;
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proto_tree_add_item(vtp_tree, hf_vtp_md, tvb, offset,
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32, FALSE);
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offset += 32;
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offset += 2; /* skip unknown field */
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proto_tree_add_text(vtp_tree, tvb, offset, 2,
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"VLAN ID of some sort: 0x%04x",
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tvb_get_ntohs(tvb, offset));
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offset += 2;
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break;
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}
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}
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}
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#define VLAN_SUSPENDED 0x01
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static const value_string vlan_type_vals[] = {
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{ 0x01, "Ethernet" },
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{ 0x02, "FDDI" },
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{ 0x03, "TrCRF" },
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{ 0x04, "FDDI-net" },
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{ 0x05, "TrBRF" },
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{ 0, NULL },
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};
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#define SR_RING_NUM 0x01
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#define SR_BRIDGE_NUM 0x02
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#define STP_TYPE 0x03
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#define PARENT_VLAN 0x04
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#define TR_BRIDGED_VLANS 0x05
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#define PRUNING 0x06
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#define BRIDGE_TYPE 0x07
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#define MAX_ARE_HOP_CNT 0x08
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#define MAX_STE_HOP_CNT 0x09
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#define BACKUP_CRF_MODE 0x0A
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static const value_string vlan_tlv_type_vals[] = {
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{ SR_RING_NUM, "Source-Routing Ring Number" },
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{ SR_BRIDGE_NUM, "Source-Routing Bridge Number" },
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{ STP_TYPE, "Spanning-Tree Protocol Type" },
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{ PARENT_VLAN, "Parent VLAN" },
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{ TR_BRIDGED_VLANS, "Translationally Bridged VLANs" },
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{ PRUNING, "Pruning" },
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{ BRIDGE_TYPE, "Bridge Type" },
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{ MAX_ARE_HOP_CNT, "Max ARE Hop Count" },
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{ MAX_STE_HOP_CNT, "Max STE Hop Count" },
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{ BACKUP_CRF_MODE, "Backup CRF Mode" },
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{ 0, NULL },
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};
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static int
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dissect_vlan_info(tvbuff_t *tvb, int offset, proto_tree *tree)
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{
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proto_item *ti;
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proto_tree *vlan_info_tree;
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proto_tree *status_tree;
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guint8 vlan_info_len;
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int vlan_info_left;
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guint8 status;
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guint8 vlan_name_len;
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guint8 type;
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int length;
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char *type_str;
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proto_tree *tlv_tree;
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vlan_info_len = tvb_get_guint8(tvb, offset);
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ti = proto_tree_add_text(tree, tvb, offset, vlan_info_len,
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"VLAN Information");
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vlan_info_tree = proto_item_add_subtree(ti, ett_vtp_vlan_info);
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vlan_info_left = vlan_info_len;
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proto_tree_add_uint(vlan_info_tree, hf_vtp_vlan_info_len, tvb, offset, 1,
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vlan_info_len);
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offset += 1;
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vlan_info_left -= 1;
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if (vlan_info_left < 1)
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return -1;
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status = tvb_get_guint8(tvb, offset);
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ti = proto_tree_add_text(vlan_info_tree, tvb, offset, 1,
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"Status: 0x%02x%s", status,
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(status & VLAN_SUSPENDED) ? "(VLAN suspended)" : "");
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status_tree = proto_item_add_subtree(ti, ett_vtp_vlan_status);
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proto_tree_add_boolean(status_tree, hf_vtp_vlan_status_vlan_susp, tvb, offset, 1,
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status);
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offset += 1;
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vlan_info_left -= 1;
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if (vlan_info_left < 1)
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return -1;
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proto_tree_add_item(vlan_info_tree, hf_vtp_vlan_type, tvb, offset, 1,
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FALSE);
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offset += 1;
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vlan_info_left -= 1;
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if (vlan_info_left < 1)
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return -1;
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vlan_name_len = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(vlan_info_tree, hf_vtp_vlan_name_len, tvb, offset, 1,
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vlan_name_len);
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offset += 1;
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vlan_info_left -= 1;
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if (vlan_info_left < 2)
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return -1;
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proto_tree_add_item(vlan_info_tree, hf_vtp_isl_vlan_id, tvb, offset, 2,
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FALSE);
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offset += 2;
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vlan_info_left -= 2;
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if (vlan_info_left < 2)
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return -1;
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proto_tree_add_item(vlan_info_tree, hf_vtp_mtu_size, tvb, offset, 2,
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FALSE);
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offset += 2;
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vlan_info_left -= 2;
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if (vlan_info_left < 4)
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return -1;
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proto_tree_add_item(vlan_info_tree, hf_vtp_802_10_index, tvb, offset, 4,
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FALSE);
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offset += 4;
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vlan_info_left -= 4;
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/* VLAN name length appears to be rounded up to a multiple of 4. */
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vlan_name_len = 4*((vlan_name_len + 3)/4);
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if (vlan_info_left < vlan_name_len)
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return -1;
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proto_tree_add_item(vlan_info_tree, hf_vtp_vlan_name, tvb, offset,
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vlan_name_len, FALSE);
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offset += vlan_name_len;
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vlan_info_left -= vlan_name_len;
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while (vlan_info_left > 0) {
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type = tvb_get_guint8(tvb, offset + 0);
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length = tvb_get_guint8(tvb, offset + 1);
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type_str = val_to_str(type, vlan_tlv_type_vals,
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"Unknown (0x%04x)");
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ti = proto_tree_add_notext(vlan_info_tree, tvb, offset,
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2 + length*2);
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tlv_tree = proto_item_add_subtree(ti, ett_vtp_tlv);
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proto_tree_add_uint(tlv_tree, hf_vtp_vlan_tlvtype, tvb, offset,
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1, type);
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proto_tree_add_uint(tlv_tree, hf_vtp_vlan_tlvlength, tvb, offset+1,
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1, length);
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offset += 2;
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vlan_info_left -= 2;
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if (length > 0) {
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dissect_vlan_info_tlv(tvb, offset, length*2, tlv_tree,
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ti, type);
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}
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offset += length*2;
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vlan_info_left -= length*2;
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}
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return vlan_info_len;
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}
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static const value_string stp_type_vals[] = {
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{ 1, "SRT" },
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{ 2, "SRB" },
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{ 3, "Auto" },
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{ 0, NULL },
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};
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static const value_string pruning_vals[] = {
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{ 1, "Enabled" },
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{ 2, "Disabled" },
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{ 0, NULL },
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};
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static const value_string bridge_type_vals[] = {
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{ 1, "SRT" },
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{ 2, "SRB" },
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{ 0, NULL },
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};
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static const value_string backup_crf_mode_vals[] = {
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{ 1, "TrCRF is configured as a backup" },
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{ 2, "TrCRF is not configured as a backup" },
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{ 0, NULL },
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};
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static void
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dissect_vlan_info_tlv(tvbuff_t *tvb, int offset, int length,
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proto_tree *tree, proto_item *ti, guint8 type)
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{
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switch (type) {
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case SR_RING_NUM:
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if (length == 2) {
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proto_item_set_text(ti,
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"Source-Routing Ring Number: 0x%04x",
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tvb_get_ntohs(tvb, offset));
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proto_tree_add_text(tree, tvb, offset, 2,
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"Source-Routing Ring Number: 0x%04x",
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tvb_get_ntohs(tvb, offset));
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} else {
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proto_item_set_text(ti,
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"Source-Routing Ring Number: Bad length %u",
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length);
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proto_tree_add_text(tree, tvb, offset, length,
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"Source-Routing Ring Number: Bad length %u",
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length);
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}
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break;
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case SR_BRIDGE_NUM:
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if (length == 2) {
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proto_item_set_text(ti,
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"Source-Routing Bridge Number: 0x%04x",
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tvb_get_ntohs(tvb, offset));
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proto_tree_add_text(tree, tvb, offset, 2,
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"Source-Routing Bridge Number: 0x%04x",
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tvb_get_ntohs(tvb, offset));
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} else {
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proto_item_set_text(ti,
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"Source-Routing Bridge Number: Bad length %u",
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length);
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proto_tree_add_text(tree, tvb, offset, length,
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"Source-Routing Bridge Number: Bad length %u",
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length);
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}
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break;
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case STP_TYPE:
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if (length == 2) {
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proto_item_set_text(ti,
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"Spanning-Tree Protocol Type: %s",
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val_to_str(tvb_get_ntohs(tvb, offset), stp_type_vals,
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"Unknown (0x%04x)"));
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proto_tree_add_text(tree, tvb, offset, 2,
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"Spanning-Tree Protocol Type: %s",
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val_to_str(tvb_get_ntohs(tvb, offset), stp_type_vals,
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"Unknown (0x%04x)"));
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} else {
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proto_item_set_text(ti,
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"Spanning-Tree Protocol Type: Bad length %u",
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length);
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proto_tree_add_text(tree, tvb, offset, length,
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"Spanning-Tree Protocol Type: Bad length %u",
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length);
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}
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break;
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case PARENT_VLAN:
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if (length == 2) {
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proto_item_set_text(ti,
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"Parent VLAN: 0x%04x",
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tvb_get_ntohs(tvb, offset));
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proto_tree_add_text(tree, tvb, offset, 2,
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"Parent VLAN: 0x%04x",
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tvb_get_ntohs(tvb, offset));
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} 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_item_set_text(ti, "Unknown TLV type: 0x%02x", type);
|
|
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,
|
|
"" }},
|
|
|
|
{ &hf_vtp_code,
|
|
{ "Code", "vtp.code", FT_UINT8, BASE_HEX, VALS(type_vals), 0x0,
|
|
"" }},
|
|
|
|
{ &hf_vtp_followers,
|
|
{ "Followers", "vtp.followers", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Number of following Subset-Advert messages" }},
|
|
|
|
{ &hf_vtp_md_len,
|
|
{ "Management Domain Length", "vtp.md_len", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Length of management domain string" }},
|
|
|
|
{ &hf_vtp_md,
|
|
{ "Management Domain", "vtp.md", FT_STRING, BASE_DEC, NULL, 0,
|
|
"Management domain" }},
|
|
|
|
{ &hf_vtp_conf_rev_num,
|
|
{ "Configuration Revision Number", "vtp.conf_rev_num", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"Revision number of the configuration information" }},
|
|
|
|
{ &hf_vtp_upd_id,
|
|
{ "Updater Identity", "vtp.upd_id", FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
"IP address of the updater" }},
|
|
|
|
{ &hf_vtp_upd_ts,
|
|
{ "Update Timestamp", "vtp.upd_ts", FT_STRING, BASE_DEC, NULL, 0,
|
|
"Time stamp of the current configuration revision" }},
|
|
|
|
{ &hf_vtp_md5_digest,
|
|
{ "MD5 Digest", "vtp.md5_digest", FT_BYTES, BASE_HEX, NULL, 0x0,
|
|
"" }},
|
|
|
|
{ &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" }},
|
|
|
|
{ &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" }},
|
|
|
|
{ &hf_vtp_vlan_info_len,
|
|
{ "VLAN Information Length", "vtp.vlan_info.len", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Length of the VLAN information field" }},
|
|
|
|
{ &hf_vtp_vlan_status_vlan_susp,
|
|
{ "VLAN suspended", "vtp.vlan_info.status.vlan_susp", FT_BOOLEAN, 8, NULL, VLAN_SUSPENDED,
|
|
"VLAN suspended" }},
|
|
|
|
{ &hf_vtp_vlan_type,
|
|
{ "VLAN Type", "vtp.vlan_info.vlan_type", FT_UINT8, BASE_HEX, VALS(vlan_type_vals), 0x0,
|
|
"Type of VLAN" }},
|
|
|
|
{ &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" }},
|
|
|
|
{ &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" }},
|
|
|
|
{ &hf_vtp_mtu_size,
|
|
{ "MTU Size", "vtp.vlan_info.mtu_size", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"MTU for this VLAN" }},
|
|
|
|
{ &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" }},
|
|
|
|
{ &hf_vtp_vlan_name,
|
|
{ "VLAN Name", "vtp.vlan_info.vlan_name", FT_STRING, BASE_DEC, NULL, 0,
|
|
"VLAN name" }},
|
|
|
|
{ &hf_vtp_vlan_tlvtype,
|
|
{ "Type", "vtp.vlan_info.tlv_type", FT_UINT8, BASE_HEX, VALS(vlan_tlv_type_vals), 0x0,
|
|
"" }},
|
|
|
|
{ &hf_vtp_vlan_tlvlength,
|
|
{ "Length", "vtp.vlan_info.tlv_len", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"" }},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_vtp,
|
|
&ett_vtp_vlan_info,
|
|
&ett_vtp_vlan_status,
|
|
&ett_vtp_tlv,
|
|
};
|
|
|
|
proto_vtp = proto_register_protocol("Virtual 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_add("llc.cisco_pid", 0x2003, dissect_vtp, proto_vtp);
|
|
}
|