forked from osmocom/wireshark
2026 lines
62 KiB
C
2026 lines
62 KiB
C
/* packet-isis-lsp.c
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* Routines for decoding isis lsp packets and their CLVs
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*
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* $Id$
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* Stuart Stanley <stuarts@mxmail.net>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/ipv4.h>
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#include <epan/packet.h>
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#include "packet-osi.h"
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#include "packet-ipv6.h"
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#include "packet-isis.h"
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#include "packet-isis-clv.h"
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#include "packet-isis-lsp.h"
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#include <epan/addr_resolv.h>
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#include <epan/addr_and_mask.h>
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#include <epan/expert.h>
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/* lsp packets */
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static int hf_isis_lsp_pdu_length = -1;
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static int hf_isis_lsp_remaining_life = -1;
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static int hf_isis_lsp_sequence_number = -1;
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static int hf_isis_lsp_lsp_id = -1;
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static int hf_isis_lsp_hostname = -1;
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static int hf_isis_lsp_checksum = -1;
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static int hf_isis_lsp_checksum_bad = -1;
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static int hf_isis_lsp_checksum_good = -1;
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static int hf_isis_lsp_clv_ipv4_int_addr = -1;
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static int hf_isis_lsp_clv_ipv6_int_addr = -1;
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static int hf_isis_lsp_clv_te_router_id = -1;
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static int hf_isis_lsp_clv_mt = -1;
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static int hf_isis_lsp_p = -1;
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static int hf_isis_lsp_att = -1;
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static int hf_isis_lsp_hippity = -1;
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static int hf_isis_lsp_is_type = -1;
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static gint ett_isis_lsp = -1;
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static gint ett_isis_lsp_info = -1;
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static gint ett_isis_lsp_att = -1;
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static gint ett_isis_lsp_cksum = -1;
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static gint ett_isis_lsp_clv_area_addr = -1;
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static gint ett_isis_lsp_clv_is_neighbors = -1;
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static gint ett_isis_lsp_clv_ext_is_reachability = -1; /* CLV 22 */
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static gint ett_isis_lsp_part_of_clv_ext_is_reachability = -1;
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static gint ett_isis_lsp_subclv_admin_group = -1;
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static gint ett_isis_lsp_subclv_unrsv_bw = -1;
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static gint ett_isis_lsp_clv_unknown = -1;
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static gint ett_isis_lsp_clv_partition_dis = -1;
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static gint ett_isis_lsp_clv_prefix_neighbors = -1;
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static gint ett_isis_lsp_clv_nlpid = -1;
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static gint ett_isis_lsp_clv_hostname = -1;
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static gint ett_isis_lsp_clv_te_router_id = -1;
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static gint ett_isis_lsp_clv_authentication = -1;
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static gint ett_isis_lsp_clv_ip_authentication = -1;
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static gint ett_isis_lsp_clv_ipv4_int_addr = -1;
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static gint ett_isis_lsp_clv_ipv6_int_addr = -1; /* CLV 232 */
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static gint ett_isis_lsp_clv_ip_reachability = -1;
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static gint ett_isis_lsp_clv_ip_reach_subclv = -1;
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static gint ett_isis_lsp_clv_ext_ip_reachability = -1; /* CLV 135 */
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static gint ett_isis_lsp_part_of_clv_ext_ip_reachability = -1;
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static gint ett_isis_lsp_clv_ipv6_reachability = -1; /* CLV 236 */
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static gint ett_isis_lsp_part_of_clv_ipv6_reachability = -1;
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static gint ett_isis_lsp_clv_mt = -1;
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static gint ett_isis_lsp_clv_mt_is = -1;
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static gint ett_isis_lsp_part_of_clv_mt_is = -1;
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static gint ett_isis_lsp_clv_mt_reachable_IPv4_prefx = -1; /* CLV 235 */
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static gint ett_isis_lsp_clv_mt_reachable_IPv6_prefx = -1; /* CLV 237 */
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static const value_string isis_lsp_istype_vals[] = {
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{ ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"},
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{ ISIS_LSP_TYPE_LEVEL_1, "Level 1"},
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{ ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"},
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{ ISIS_LSP_TYPE_LEVEL_2, "Level 2"},
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{ 0, NULL } };
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/*
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* Predclare dissectors for use in clv dissection.
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*/
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static void dissect_lsp_prefix_neighbors_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_partition_dis_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_mt_is_reachability_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_ext_is_reachability_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_l2_is_neighbors_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_l1_es_neighbors_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_l1_is_neighbors_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_area_address_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_authentication_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_ip_authentication_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_ipv6_int_addr_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_ip_int_addr_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_te_router_id_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_hostname_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_mt_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_nlpid_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_ipv6_reachability_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_ext_ip_reachability_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_ip_reachability_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_ipreach_subclv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int clv_code, int clv_len);
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static void dissect_lsp_mt_reachable_IPv4_prefx_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static void dissect_lsp_mt_reachable_IPv6_prefx_clv(tvbuff_t *tvb,
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proto_tree *tree, int offset, int id_length, int length);
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static const isis_clv_handle_t clv_l1_lsp_opts[] = {
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{
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ISIS_CLV_AREA_ADDRESS,
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"Area address(es)",
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&ett_isis_lsp_clv_area_addr,
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dissect_lsp_area_address_clv
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},
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{
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ISIS_CLV_IS_REACH,
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"IS Reachability",
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&ett_isis_lsp_clv_is_neighbors,
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dissect_lsp_l1_is_neighbors_clv
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},
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{
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ISIS_CLV_ES_NEIGHBORS,
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"ES Neighbor(s)",
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&ett_isis_lsp_clv_is_neighbors,
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dissect_lsp_l1_es_neighbors_clv
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},
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{
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ISIS_CLV_EXTD_IS_REACH,
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"Extended IS reachability",
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&ett_isis_lsp_clv_ext_is_reachability,
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dissect_lsp_ext_is_reachability_clv
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},
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{
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ISIS_CLV_INT_IP_REACH,
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"IP Internal reachability",
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&ett_isis_lsp_clv_ip_reachability,
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dissect_lsp_ip_reachability_clv
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},
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{
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ISIS_CLV_EXT_IP_REACH,
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"IP External reachability",
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&ett_isis_lsp_clv_ip_reachability,
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dissect_lsp_ip_reachability_clv
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},
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{
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ISIS_CLV_EXTD_IP_REACH,
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"Extended IP Reachability",
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&ett_isis_lsp_clv_ext_ip_reachability,
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dissect_lsp_ext_ip_reachability_clv
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},
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{
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ISIS_CLV_IP6_REACH,
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"IPv6 reachability",
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&ett_isis_lsp_clv_ipv6_reachability,
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dissect_lsp_ipv6_reachability_clv
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},
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{
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ISIS_CLV_PROTOCOLS_SUPPORTED,
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"Protocols supported",
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&ett_isis_lsp_clv_nlpid,
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dissect_lsp_nlpid_clv
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},
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{
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ISIS_CLV_HOSTNAME,
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"Hostname",
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&ett_isis_lsp_clv_hostname,
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dissect_lsp_hostname_clv
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},
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{
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ISIS_CLV_TE_ROUTER_ID,
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"Traffic Engineering Router ID",
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&ett_isis_lsp_clv_te_router_id,
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dissect_lsp_te_router_id_clv
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},
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{
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ISIS_CLV_IP_ADDR,
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"IP Interface address(es)",
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&ett_isis_lsp_clv_ipv4_int_addr,
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dissect_lsp_ip_int_addr_clv
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},
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{
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ISIS_CLV_IP6_ADDR,
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"IPv6 Interface address(es)",
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&ett_isis_lsp_clv_ipv6_int_addr,
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dissect_lsp_ipv6_int_addr_clv
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},
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{
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ISIS_CLV_AUTHENTICATION,
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"Authentication",
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&ett_isis_lsp_clv_authentication,
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dissect_lsp_authentication_clv
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},
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{
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ISIS_CLV_IP_AUTHENTICATION,
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"IP Authentication",
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&ett_isis_lsp_clv_ip_authentication,
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dissect_lsp_ip_authentication_clv
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},
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{
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ISIS_CLV_MT_SUPPORTED,
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"Multi Topology supported",
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&ett_isis_lsp_clv_mt,
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dissect_lsp_mt_clv
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},
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{
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ISIS_CLV_MT_IS_REACH,
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"Multi Topology IS Reachability",
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&ett_isis_lsp_clv_mt_is,
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dissect_lsp_mt_is_reachability_clv
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},
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{
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ISIS_CLV_MT_IP_REACH,
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"Multi Topology Reachable IPv4 Prefixes",
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&ett_isis_lsp_clv_mt_reachable_IPv4_prefx,
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dissect_lsp_mt_reachable_IPv4_prefx_clv
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},
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{
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ISIS_CLV_MT_IP6_REACH,
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"Multi Topology Reachable IPv6 Prefixes",
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&ett_isis_lsp_clv_mt_reachable_IPv6_prefx,
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dissect_lsp_mt_reachable_IPv6_prefx_clv
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},
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{
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0,
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"",
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NULL,
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NULL
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}
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};
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static const isis_clv_handle_t clv_l2_lsp_opts[] = {
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{
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ISIS_CLV_AREA_ADDRESS,
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"Area address(es)",
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&ett_isis_lsp_clv_area_addr,
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dissect_lsp_area_address_clv
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},
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{
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ISIS_CLV_IS_REACH,
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"IS Reachability",
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&ett_isis_lsp_clv_is_neighbors,
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dissect_lsp_l2_is_neighbors_clv
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},
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{
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ISIS_CLV_EXTD_IS_REACH,
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"Extended IS reachability",
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&ett_isis_lsp_clv_ext_is_reachability,
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dissect_lsp_ext_is_reachability_clv
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},
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{
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ISIS_CLV_PARTITION_DIS,
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"Partition Designated Level 2 IS",
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&ett_isis_lsp_clv_partition_dis,
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dissect_lsp_partition_dis_clv
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},
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{
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ISIS_CLV_PREFIX_NEIGHBORS,
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"Prefix neighbors",
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&ett_isis_lsp_clv_prefix_neighbors,
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dissect_lsp_prefix_neighbors_clv
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},
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{
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ISIS_CLV_INT_IP_REACH,
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"IP Internal reachability",
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&ett_isis_lsp_clv_ip_reachability,
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dissect_lsp_ip_reachability_clv
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},
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{
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ISIS_CLV_EXT_IP_REACH,
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"IP External reachability",
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&ett_isis_lsp_clv_ip_reachability,
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dissect_lsp_ip_reachability_clv
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},
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{
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ISIS_CLV_PROTOCOLS_SUPPORTED,
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"Protocols supported",
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&ett_isis_lsp_clv_nlpid,
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dissect_lsp_nlpid_clv
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},
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{
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ISIS_CLV_HOSTNAME,
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"Hostname",
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&ett_isis_lsp_clv_hostname,
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dissect_lsp_hostname_clv
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},
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{
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ISIS_CLV_TE_ROUTER_ID,
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"Traffic Engineering Router ID",
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&ett_isis_lsp_clv_te_router_id,
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dissect_lsp_te_router_id_clv
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},
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{
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ISIS_CLV_EXTD_IP_REACH,
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"Extended IP Reachability",
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&ett_isis_lsp_clv_ext_ip_reachability,
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dissect_lsp_ext_ip_reachability_clv
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},
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{
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ISIS_CLV_IP6_REACH,
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"IPv6 reachability",
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&ett_isis_lsp_clv_ipv6_reachability,
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dissect_lsp_ipv6_reachability_clv
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},
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{
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ISIS_CLV_IP_ADDR,
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"IP Interface address(es)",
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&ett_isis_lsp_clv_ipv4_int_addr,
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dissect_lsp_ip_int_addr_clv
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},
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{
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ISIS_CLV_IP6_ADDR,
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"IPv6 Interface address(es)",
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&ett_isis_lsp_clv_ipv6_int_addr,
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dissect_lsp_ipv6_int_addr_clv
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},
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{
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ISIS_CLV_AUTHENTICATION,
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"Authentication",
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&ett_isis_lsp_clv_authentication,
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dissect_lsp_authentication_clv
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},
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{
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ISIS_CLV_IP_AUTHENTICATION,
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"IP Authentication",
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&ett_isis_lsp_clv_ip_authentication,
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dissect_lsp_ip_authentication_clv
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},
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{
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ISIS_CLV_MT_SUPPORTED,
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"Multi Topology",
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&ett_isis_lsp_clv_mt,
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dissect_lsp_mt_clv
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},
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{
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ISIS_CLV_MT_IS_REACH,
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"Multi Topology IS Reachability",
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&ett_isis_lsp_clv_mt_is,
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dissect_lsp_mt_is_reachability_clv
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},
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{
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ISIS_CLV_MT_IP_REACH,
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"Multi Topology Reachable IPv4 Prefixes",
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&ett_isis_lsp_clv_mt_reachable_IPv4_prefx,
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dissect_lsp_mt_reachable_IPv4_prefx_clv
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},
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{
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ISIS_CLV_MT_IP6_REACH,
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"Multi Topology Reachable IPv6 Prefixes",
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&ett_isis_lsp_clv_mt_reachable_IPv6_prefx,
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dissect_lsp_mt_reachable_IPv6_prefx_clv
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},
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{
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0,
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"",
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NULL,
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NULL
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}
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};
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|
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/*
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* Name: dissect_lsp_mt_id()
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*
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* Description:
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* dissect and display the multi-topology ID value
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*
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* Input:
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* tvbuff_t * : tvbuffer for packet data
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* proto_tree * : protocol display tree to fill out. CAN'T BE NULL
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* int : offset into packet data where we are.
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*
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* Output:
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* void, but we will add to proto tree.
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*/
|
|
static void
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dissect_lsp_mt_id(tvbuff_t *tvb, proto_tree *tree, int offset)
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{
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int mt_block, mt_id;
|
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const char *mt_desc="";
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|
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/* fetch two bytes */
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|
mt_block = tvb_get_ntohs(tvb, offset);
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|
|
proto_tree_add_text ( tree, tvb, offset, 1 ,
|
|
"4 most significant bits reserved, should be set to 0 (%d)", ISIS_LSP_MT_MSHIP_RES(mt_block));
|
|
|
|
mt_id = ISIS_LSP_MT_MSHIP_ID(mt_block);
|
|
/*mask out the lower 12 bits */
|
|
switch(mt_id) {
|
|
case 0:
|
|
mt_desc="'standard' topology";
|
|
break;
|
|
case 1:
|
|
mt_desc="IPv4 In-Band Management purposes";
|
|
break;
|
|
case 2:
|
|
mt_desc="IPv6 routing topology";
|
|
break;
|
|
case 3:
|
|
mt_desc="IPv4 multicast routing topology";
|
|
break;
|
|
case 4:
|
|
mt_desc="IPv6 multicast routing topology";
|
|
break;
|
|
default:
|
|
mt_desc=((mt_block & 0x0fff) < 3996) ? "Reserved for IETF Consensus" : "Development, Experimental and Proprietary features";
|
|
}
|
|
|
|
proto_tree_add_text ( tree, tvb, offset, 2 ,
|
|
"%s (%d)", mt_desc, mt_id);
|
|
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_metric()
|
|
*
|
|
* Description:
|
|
* Display a metric prefix portion. ISIS has the concept of multple
|
|
* metric per prefix (default, delay, expense, and error). This
|
|
* routine assists other dissectors by adding a single one of
|
|
* these to the display tree..
|
|
*
|
|
* The 8th(msbit) bit in the metric octet is the "supported" bit. The
|
|
* "default" support is required, so we support a "force_supported"
|
|
* flag that tells us that it MUST be zero (zero==supported,
|
|
* so it really should be a "not supported" in the boolean sense)
|
|
* and to display a protocol failure accordingly. Notably,
|
|
* Cisco IOS 12(6) blows this!
|
|
* The 7th bit must be zero (reserved).
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* guint8 : value of the metric.
|
|
* char * : string giving type of the metric.
|
|
* int : force supported. True is the supported bit MUST be zero.
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_metric(tvbuff_t *tvb, proto_tree *tree, int offset, guint8 value,
|
|
const char *pstr, int force_supported )
|
|
{
|
|
int s;
|
|
|
|
if ( !tree ) return;
|
|
|
|
s = ISIS_LSP_CLV_METRIC_SUPPORTED(value);
|
|
proto_tree_add_text(tree, tvb, offset, 1,
|
|
"%s Metric: %s%s %s%d:%d", pstr,
|
|
s ? "Not supported" : "Supported",
|
|
(s && force_supported) ? "(but is required to be)":"",
|
|
ISIS_LSP_CLV_METRIC_RESERVED(value) ? "(reserved bit != 0)":"",
|
|
ISIS_LSP_CLV_METRIC_VALUE(value), value );
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_ip_reachability_clv()
|
|
*
|
|
* Description:
|
|
* Decode an IP reachability CLV. This can be either internal or
|
|
* external (the clv format does not change and which type we are
|
|
* displaying is put there by the dispatcher). All of these
|
|
* are a metric block followed by an IP addr and mask.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : proto tree to build on (may be null)
|
|
* int : current offset into packet data
|
|
* int : length of IDs in packet.
|
|
* int : length of this clv
|
|
*
|
|
* Output:
|
|
* void, will modify proto_tree if not null.
|
|
*/
|
|
static void
|
|
dissect_lsp_ip_reachability_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length _U_, int length)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *ntree = NULL;
|
|
guint32 src, mask, bitmask;
|
|
int prefix_len;
|
|
gboolean found_mask = FALSE;
|
|
|
|
while ( length > 0 ) {
|
|
if (length<12) {
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"short IP reachability (%d vs 12)", length );
|
|
return;
|
|
}
|
|
/*
|
|
* Gotta build a sub-tree for all our pieces
|
|
*/
|
|
if ( tree ) {
|
|
src = tvb_get_ipv4(tvb, offset+4);
|
|
mask = tvb_get_ntohl(tvb, offset+8);
|
|
|
|
/* find out if the mask matches one of 33 possible prefix lengths */
|
|
bitmask = 0xffffffff;
|
|
for(prefix_len = 32; prefix_len >= 0; prefix_len--) {
|
|
if (bitmask==mask) {
|
|
found_mask = TRUE;
|
|
break;
|
|
}
|
|
bitmask = bitmask << 1;
|
|
}
|
|
|
|
/* If we have a discontiguous netmask, dump the mask, otherwise print the prefix_len */
|
|
/* XXX - We should probably have some sort of netmask_to_str() routine in to_str.c that does this. */
|
|
|
|
if(found_mask) {
|
|
ti = proto_tree_add_text ( tree, tvb, offset, 12,
|
|
"IPv4 prefix: %s/%d",
|
|
ip_to_str((guint8*)&src),
|
|
prefix_len );
|
|
} else {
|
|
ti = proto_tree_add_text ( tree, tvb, offset, 12,
|
|
"IPv4 prefix: %s mask %s",
|
|
ip_to_str((guint8*)&src),
|
|
ip_to_str(tvb_get_ptr(tvb, offset+8, 4)));
|
|
};
|
|
|
|
ntree = proto_item_add_subtree(ti,
|
|
ett_isis_lsp_clv_ip_reachability);
|
|
|
|
proto_tree_add_text (ntree, tvb, offset, 1,
|
|
"Default Metric: %d, %s, Distribution: %s",
|
|
ISIS_LSP_CLV_METRIC_VALUE(tvb_get_guint8(tvb, offset)),
|
|
ISIS_LSP_CLV_METRIC_IE(tvb_get_guint8(tvb, offset)) ? "External" : "Internal",
|
|
ISIS_LSP_CLV_METRIC_UPDOWN(tvb_get_guint8(tvb, offset)) ? "down" : "up");
|
|
|
|
|
|
if (ISIS_LSP_CLV_METRIC_SUPPORTED(tvb_get_guint8(tvb, offset+1))) {
|
|
proto_tree_add_text (ntree, tvb, offset+1, 1, "Delay Metric: Not supported");
|
|
} else {
|
|
proto_tree_add_text (ntree, tvb, offset+1, 1, "Delay Metric: %d, %s",
|
|
ISIS_LSP_CLV_METRIC_VALUE(tvb_get_guint8(tvb, offset+1)),
|
|
ISIS_LSP_CLV_METRIC_IE(tvb_get_guint8(tvb, offset+1)) ? "External" : "Internal");
|
|
}
|
|
|
|
if (ISIS_LSP_CLV_METRIC_SUPPORTED(tvb_get_guint8(tvb, offset+2))) {
|
|
proto_tree_add_text (ntree, tvb, offset+2, 1, "Expense Metric: Not supported");
|
|
} else {
|
|
proto_tree_add_text (ntree, tvb, offset+2, 1, "Expense Metric: %d, %s",
|
|
ISIS_LSP_CLV_METRIC_VALUE(tvb_get_guint8(tvb, offset+2)),
|
|
ISIS_LSP_CLV_METRIC_IE(tvb_get_guint8(tvb, offset+2)) ? "External" : "Internal");
|
|
}
|
|
|
|
if (ISIS_LSP_CLV_METRIC_SUPPORTED(tvb_get_guint8(tvb, offset+3))) {
|
|
proto_tree_add_text (ntree, tvb, offset+3, 1, "Error Metric: Not supported");
|
|
} else {
|
|
proto_tree_add_text (ntree, tvb, offset+3, 1, "Error Metric: %d, %s",
|
|
ISIS_LSP_CLV_METRIC_VALUE(tvb_get_guint8(tvb, offset+3)),
|
|
ISIS_LSP_CLV_METRIC_IE(tvb_get_guint8(tvb, offset+3)) ? "External" : "Internal");
|
|
}
|
|
}
|
|
offset += 12;
|
|
length -= 12;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_ipreach_subclv ()
|
|
*
|
|
* Description: parses IP reach subTLVs
|
|
* Called by various IP Reachability dissectors.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out.
|
|
* int : offset into packet data where we are (beginning of the sub_clv value).
|
|
*
|
|
* Output:
|
|
* void
|
|
*/
|
|
static void
|
|
dissect_ipreach_subclv(tvbuff_t *tvb, proto_tree *tree, int offset, int clv_code, int clv_len)
|
|
{
|
|
|
|
switch (clv_code) {
|
|
case 1:
|
|
while (clv_len >= 4) {
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"32-Bit Administrative tag: 0x%08x (=%u)",
|
|
tvb_get_ntohl(tvb, offset),
|
|
tvb_get_ntohl(tvb, offset));
|
|
offset+=4;
|
|
clv_len-=4;
|
|
}
|
|
break;
|
|
case 2:
|
|
while (clv_len >= 8) {
|
|
proto_tree_add_text(tree, tvb, offset, 8,
|
|
"64-Bit Administrative tag: 0x%08x%08x",
|
|
tvb_get_ntohl(tvb, offset),
|
|
tvb_get_ntohl(tvb, offset+4));
|
|
offset+=8;
|
|
clv_len-=8;
|
|
}
|
|
break;
|
|
|
|
default :
|
|
proto_tree_add_text (tree, tvb, offset, clv_len+2,
|
|
"Unknown sub-TLV: code %u, length %u",
|
|
clv_code, clv_len );
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Name: dissect_lsp_ext_ip_reachability_clv()
|
|
*
|
|
* Description: Decode an Extended IP Reachability CLV - code 135.
|
|
*
|
|
* The extended IP reachability TLV is an extended version
|
|
* of the IP reachability TLVs (codes 128 and 130). It encodes
|
|
* the metric as a 32-bit unsigned interger and allows to add
|
|
* sub-CLV(s).
|
|
*
|
|
* CALLED BY TLV 235 DISSECTOR
|
|
*
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : proto tree to build on (may be null)
|
|
* int : current offset into packet data
|
|
* int : length of IDs in packet.
|
|
* int : length of this clv
|
|
*
|
|
* Output:
|
|
* void, will modify proto_tree if not null.
|
|
*/
|
|
static void
|
|
dissect_lsp_ext_ip_reachability_clv(tvbuff_t *tvb, proto_tree *tree,
|
|
int offset, int id_length _U_, int length)
|
|
{
|
|
proto_item *pi = NULL;
|
|
proto_tree *subtree = NULL;
|
|
proto_tree *subtree2 = NULL;
|
|
guint8 ctrl_info;
|
|
guint bit_length;
|
|
int byte_length;
|
|
guint8 prefix [4];
|
|
guint32 metric;
|
|
guint len,i;
|
|
guint subclvs_len;
|
|
guint clv_code, clv_len;
|
|
|
|
if (!tree) return;
|
|
|
|
while (length > 0) {
|
|
ctrl_info = tvb_get_guint8(tvb, offset+4);
|
|
bit_length = ctrl_info & 0x3f;
|
|
byte_length = ipv4_addr_and_mask(tvb, offset+5, prefix, bit_length);
|
|
if (byte_length == -1) {
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"IPv4 prefix has an invalid length: %d bits", bit_length );
|
|
return;
|
|
}
|
|
metric = tvb_get_ntohl(tvb, offset);
|
|
subclvs_len = 0;
|
|
if ((ctrl_info & 0x40) != 0)
|
|
subclvs_len = 1+tvb_get_guint8(tvb, offset+5+byte_length);
|
|
|
|
pi = proto_tree_add_text (tree, tvb, offset, 5+byte_length+subclvs_len,
|
|
"IPv4 prefix: %s/%d, Metric: %u, Distribution: %s, %ssub-TLVs present",
|
|
ip_to_str (prefix),
|
|
bit_length,
|
|
metric,
|
|
((ctrl_info & 0x80) == 0) ? "up" : "down",
|
|
((ctrl_info & 0x40) == 0) ? "no " : "" );
|
|
|
|
/* open up a new tree per prefix */
|
|
subtree = proto_item_add_subtree (pi, ett_isis_lsp_part_of_clv_ext_ip_reachability);
|
|
|
|
proto_tree_add_text (subtree, tvb, offset+5, byte_length, "IPv4 prefix: %s/%u",
|
|
ip_to_str (prefix),
|
|
bit_length);
|
|
|
|
proto_tree_add_text (subtree, tvb, offset, 4, "Metric: %u", metric);
|
|
|
|
proto_tree_add_text (subtree, tvb, offset+4, 1, "Distribution: %s",
|
|
((ctrl_info & 0x80) == 0) ? "up" : "down");
|
|
|
|
len = 5 + byte_length;
|
|
if ((ctrl_info & 0x40) != 0) {
|
|
subclvs_len = tvb_get_guint8(tvb, offset+len);
|
|
pi = proto_tree_add_text (subtree, tvb, offset+len, 1, "sub-TLVs present, total length: %u bytes",
|
|
subclvs_len);
|
|
proto_item_set_len (pi, subclvs_len+1);
|
|
/* open up a new tree for the subTLVs */
|
|
subtree2 = proto_item_add_subtree (pi, ett_isis_lsp_clv_ip_reach_subclv);
|
|
|
|
i =0;
|
|
while (i < subclvs_len) {
|
|
clv_code = tvb_get_guint8(tvb, offset+len+1); /* skip the total subtlv len indicator */
|
|
clv_len = tvb_get_guint8(tvb, offset+len+2);
|
|
|
|
/*
|
|
* we pass on now the raw data to the ipreach_subtlv dissector
|
|
* therefore we need to skip 3 bytes
|
|
* (total subtlv len, subtlv type, subtlv len)
|
|
*/
|
|
dissect_ipreach_subclv(tvb, subtree2, offset+len+3, clv_code, clv_len);
|
|
i += clv_len + 2;
|
|
}
|
|
len += 1 + subclvs_len;
|
|
} else {
|
|
proto_tree_add_text (subtree, tvb, offset+4, 1, "no sub-TLVs present");
|
|
proto_item_set_len (pi, len);
|
|
}
|
|
|
|
offset += len;
|
|
length -= len;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_ipv6_reachability_clv()
|
|
*
|
|
* Description: Decode an IPv6 reachability CLV - code 236.
|
|
*
|
|
* CALLED BY TLV 237 DISSECTOR
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : proto tree to build on (may be null)
|
|
* int : current offset into packet data
|
|
* int : length of IDs in packet.
|
|
* int : length of this clv
|
|
*
|
|
* Output:
|
|
* void, will modify proto_tree if not null.
|
|
*/
|
|
static void
|
|
dissect_lsp_ipv6_reachability_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length _U_, int length)
|
|
{
|
|
proto_item *pi;
|
|
proto_tree *subtree = NULL;
|
|
proto_tree *subtree2 = NULL;
|
|
guint8 ctrl_info;
|
|
guint bit_length;
|
|
int byte_length;
|
|
struct e_in6_addr prefix;
|
|
guint32 metric;
|
|
guint len,i;
|
|
guint subclvs_len;
|
|
guint clv_code, clv_len;
|
|
|
|
if (!tree) return;
|
|
|
|
while (length > 0) {
|
|
ctrl_info = tvb_get_guint8(tvb, offset+4);
|
|
bit_length = tvb_get_guint8(tvb, offset+5);
|
|
byte_length = ipv6_addr_and_mask(tvb, offset+6, &prefix, bit_length);
|
|
if (byte_length == -1) {
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"IPv6 prefix has an invalid length: %d bits", bit_length );
|
|
return;
|
|
}
|
|
metric = tvb_get_ntohl(tvb, offset);
|
|
subclvs_len = 0;
|
|
if ((ctrl_info & 0x20) != 0)
|
|
subclvs_len = 1+tvb_get_guint8(tvb, offset+6+byte_length);
|
|
|
|
pi = proto_tree_add_text (tree, tvb, offset, 6+byte_length+subclvs_len,
|
|
"IPv6 prefix: %s/%u, Metric: %u, Distribution: %s, %s, %ssub-TLVs present",
|
|
ip6_to_str (&prefix),
|
|
bit_length,
|
|
metric,
|
|
((ctrl_info & 0x80) == 0) ? "up" : "down",
|
|
((ctrl_info & 0x40) == 0) ? "internal" : "external",
|
|
((ctrl_info & 0x20) == 0) ? "no " : "" );
|
|
|
|
subtree = proto_item_add_subtree (pi, ett_isis_lsp_part_of_clv_ipv6_reachability);
|
|
|
|
proto_tree_add_text (subtree, tvb, offset+6, byte_length, "IPv6 prefix: %s/%u",
|
|
ip6_to_str (&prefix),
|
|
bit_length);
|
|
|
|
proto_tree_add_text (subtree, tvb, offset, 4,
|
|
"Metric: %u", metric);
|
|
|
|
proto_tree_add_text (subtree, tvb, offset+4, 1,
|
|
"Distribution: %s, %s",
|
|
((ctrl_info & 0x80) == 0) ? "up" : "down",
|
|
((ctrl_info & 0x40) == 0) ? "internal" : "external" );
|
|
|
|
if ((ctrl_info & 0x1f) != 0) {
|
|
proto_tree_add_text (subtree, tvb, offset+4, 1,
|
|
"Reserved bits: 0x%x",
|
|
(ctrl_info & 0x1f) );
|
|
}
|
|
|
|
len = 6 + byte_length;
|
|
if ((ctrl_info & 0x20) != 0) {
|
|
subclvs_len = tvb_get_guint8(tvb, offset+len);
|
|
pi = proto_tree_add_text (subtree, tvb, offset+len, 1, "sub-TLVs present, total length: %u bytes",
|
|
subclvs_len);
|
|
proto_item_set_len (pi, subclvs_len+1);
|
|
/* open up a new tree for the subTLVs */
|
|
subtree2 = proto_item_add_subtree (pi, ett_isis_lsp_clv_ip_reach_subclv);
|
|
|
|
i =0;
|
|
while (i < subclvs_len) {
|
|
clv_code = tvb_get_guint8(tvb, offset+len+1); /* skip the total subtlv len indicator */
|
|
clv_len = tvb_get_guint8(tvb, offset+len+2);
|
|
dissect_ipreach_subclv(tvb, subtree2, offset+len+3, clv_code, clv_len);
|
|
i += clv_len + 2;
|
|
}
|
|
len += 1 + subclvs_len;
|
|
} else {
|
|
proto_tree_add_text (subtree, tvb, offset+4, 1, "no sub-TLVs present");
|
|
proto_item_set_len (pi, len);
|
|
}
|
|
offset += len;
|
|
length -= len;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_nlpid_clv()
|
|
*
|
|
* Description:
|
|
* Decode for a lsp packets NLPID clv. Calls into the
|
|
* clv common one.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : proto tree to build on (may be null)
|
|
* int : current offset into packet data
|
|
* int : length of IDs in packet.
|
|
* int : length of this clv
|
|
*
|
|
* Output:
|
|
* void, will modify proto_tree if not null.
|
|
*/
|
|
static void
|
|
dissect_lsp_nlpid_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length _U_, int length)
|
|
{
|
|
isis_dissect_nlpid_clv(tvb, tree, offset, length);
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_mt_clv()
|
|
*
|
|
* Description: - code 229
|
|
* Decode for a lsp packets Multi Topology clv. Calls into the
|
|
* clv common one.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : proto tree to build on (may be null)
|
|
* int : current offset into packet data
|
|
* guint : length of this clv
|
|
* int : length of IDs in packet.
|
|
*
|
|
* Output:
|
|
* void, will modify proto_tree if not null.
|
|
*/
|
|
static void
|
|
dissect_lsp_mt_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length _U_, int length)
|
|
{
|
|
isis_dissect_mt_clv(tvb, tree, offset, length, hf_isis_lsp_clv_mt );
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_hostname_clv()
|
|
*
|
|
* Description:
|
|
* Decode for a lsp packets hostname clv. Calls into the
|
|
* clv common one.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : proto tree to build on (may be null)
|
|
* int : current offset into packet data
|
|
* int : length of IDs in packet.
|
|
* int : length of this clv
|
|
*
|
|
* Output:
|
|
* void, will modify proto_tree if not null.
|
|
*/
|
|
static void
|
|
dissect_lsp_hostname_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length _U_, int length)
|
|
{
|
|
isis_dissect_hostname_clv(tvb, tree, offset, length,
|
|
hf_isis_lsp_hostname);
|
|
}
|
|
|
|
|
|
/*
|
|
* Name: dissect_lsp_te_router_id_clv()
|
|
*
|
|
* Description:
|
|
* Decode for a lsp packets Traffic Engineering ID clv. Calls into the
|
|
* clv common one.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : proto tree to build on (may be null)
|
|
* int : current offset into packet data
|
|
* int : length of IDs in packet.
|
|
* int : length of this clv
|
|
*
|
|
* Output:
|
|
* void, will modify proto_tree if not null.
|
|
*/
|
|
static void
|
|
dissect_lsp_te_router_id_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length _U_, int length)
|
|
{
|
|
isis_dissect_te_router_id_clv(tvb, tree, offset, length,
|
|
hf_isis_lsp_clv_te_router_id );
|
|
}
|
|
|
|
|
|
/*
|
|
* Name: dissect_lsp_ip_int_addr_clv()
|
|
*
|
|
* Description:
|
|
* Decode for a lsp packets ip interface addr clv. Calls into the
|
|
* clv common one.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : proto tree to build on (may be null)
|
|
* int : current offset into packet data
|
|
* int : length of IDs in packet.
|
|
* int : length of this clv
|
|
*
|
|
* Output:
|
|
* void, will modify proto_tree if not null.
|
|
*/
|
|
static void
|
|
dissect_lsp_ip_int_addr_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length _U_, int length)
|
|
{
|
|
isis_dissect_ip_int_clv(tvb, tree, offset, length,
|
|
hf_isis_lsp_clv_ipv4_int_addr );
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_ipv6_int_addr_clv()
|
|
*
|
|
* Description: Decode an IPv6 interface addr CLV - code 232.
|
|
*
|
|
* Calls into the clv common one.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : proto tree to build on (may be null)
|
|
* int : current offset into packet data
|
|
* int : length of IDs in packet.
|
|
* int : length of this clv
|
|
*
|
|
* Output:
|
|
* void, will modify proto_tree if not null.
|
|
*/
|
|
static void
|
|
dissect_lsp_ipv6_int_addr_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length _U_, int length)
|
|
{
|
|
isis_dissect_ipv6_int_clv(tvb, tree, offset, length,
|
|
hf_isis_lsp_clv_ipv6_int_addr );
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_authentication_clv()
|
|
*
|
|
* Description:
|
|
* Decode for a lsp packets authenticaion clv. Calls into the
|
|
* clv common one.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : proto tree to build on (may be null)
|
|
* int : current offset into packet data
|
|
* int : length of IDs in packet.
|
|
* int : length of this clv
|
|
*
|
|
* Output:
|
|
* void, will modify proto_tree if not null.
|
|
*/
|
|
static void
|
|
dissect_lsp_authentication_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length _U_, int length)
|
|
{
|
|
isis_dissect_authentication_clv(tvb, tree, offset, length);
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_ip_authentication_clv()
|
|
*
|
|
* Description:
|
|
* Decode for a lsp packets authenticaion clv. Calls into the
|
|
* clv common one.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : proto tree to build on (may be null)
|
|
* int : current offset into packet data
|
|
* int : length of IDs in packet.
|
|
* int : length of this clv
|
|
*
|
|
* Output:
|
|
* void, will modify proto_tree if not null.
|
|
*/
|
|
static void
|
|
dissect_lsp_ip_authentication_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length _U_, int length)
|
|
{
|
|
isis_dissect_ip_authentication_clv(tvb, tree, offset, length);
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_area_address_clv()
|
|
*
|
|
* Description:
|
|
* Decode for a lsp packet's area address clv. Call into clv common
|
|
* one.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of IDs in packet.
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_lsp_area_address_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length _U_, int length)
|
|
{
|
|
isis_dissect_area_address_clv(tvb, tree, offset, length);
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_eis_neighbors_clv_inner()
|
|
*
|
|
* Description:
|
|
* Real work horse for showing neighbors. This means we decode the
|
|
* first octet as either virtual/!virtual (if show_virtual param is
|
|
* set), or as a must == 0 reserved value.
|
|
*
|
|
* Once past that, we decode n neighbor elements. Each neighbor
|
|
* is comprised of a metric block (is dissect_metric) and the
|
|
* addresses.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of IDs in packet.
|
|
* int : length of clv we are decoding
|
|
* int : set to decode first octet as virtual vs reserved == 0
|
|
* int : set to indicate EIS instead of IS (6 octet per addr instead of 7)
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_lsp_eis_neighbors_clv_inner(tvbuff_t *tvb, proto_tree *tree,
|
|
int offset, int length, int id_length, int show_virtual, int is_eis)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *ntree = NULL;
|
|
int tlen;
|
|
|
|
if (!is_eis) {
|
|
id_length++; /* IDs are one octet longer in IS neighbours */
|
|
if ( tree ) {
|
|
if ( show_virtual ) {
|
|
/* virtual path flag */
|
|
proto_tree_add_text ( tree, tvb, offset, 1,
|
|
tvb_get_guint8(tvb, offset) ? "IsVirtual" : "IsNotVirtual" );
|
|
} else {
|
|
proto_tree_add_text ( tree, tvb, offset, 1,
|
|
"Reserved value 0x%02x, must == 0",
|
|
tvb_get_guint8(tvb, offset) );
|
|
}
|
|
}
|
|
offset++;
|
|
length--;
|
|
}
|
|
tlen = 4 + id_length;
|
|
|
|
while ( length > 0 ) {
|
|
if (length<tlen) {
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"short E/IS reachability (%d vs %d)", length,
|
|
tlen );
|
|
return;
|
|
}
|
|
/*
|
|
* Gotta build a sub-tree for all our pieces
|
|
*/
|
|
if ( tree ) {
|
|
if ( is_eis ) {
|
|
ti = proto_tree_add_text(tree, tvb, offset, tlen,
|
|
"ES Neighbor: %s",
|
|
print_system_id( tvb_get_ptr(tvb, offset+4, id_length), id_length ) );
|
|
} else {
|
|
ti = proto_tree_add_text(tree, tvb, offset, tlen,
|
|
"IS Neighbor: %s",
|
|
print_system_id(tvb_get_ptr(tvb, offset+4, id_length), id_length ) );
|
|
}
|
|
ntree = proto_item_add_subtree(ti,
|
|
ett_isis_lsp_clv_is_neighbors);
|
|
|
|
|
|
|
|
proto_tree_add_text (ntree, tvb, offset, 1,
|
|
"Default Metric: %d, %s",
|
|
ISIS_LSP_CLV_METRIC_VALUE(tvb_get_guint8(tvb, offset)),
|
|
ISIS_LSP_CLV_METRIC_IE(tvb_get_guint8(tvb, offset)) ? "External" : "Internal");
|
|
|
|
if (ISIS_LSP_CLV_METRIC_SUPPORTED(tvb_get_guint8(tvb, offset+1))) {
|
|
proto_tree_add_text (ntree, tvb, offset+1, 1, "Delay Metric: Not supported");
|
|
} else {
|
|
proto_tree_add_text (ntree, tvb, offset+1, 1, "Delay Metric: %d, %s",
|
|
ISIS_LSP_CLV_METRIC_VALUE(tvb_get_guint8(tvb, offset+1)),
|
|
ISIS_LSP_CLV_METRIC_IE(tvb_get_guint8(tvb, offset+1)) ? "External" : "Internal");
|
|
}
|
|
|
|
|
|
if (ISIS_LSP_CLV_METRIC_SUPPORTED(tvb_get_guint8(tvb, offset+2))) {
|
|
proto_tree_add_text (ntree, tvb, offset+2, 1, "Expense Metric: Not supported");
|
|
} else {
|
|
proto_tree_add_text (ntree, tvb, offset+2, 1, "Expense Metric: %d, %s",
|
|
ISIS_LSP_CLV_METRIC_VALUE(tvb_get_guint8(tvb, offset+2)),
|
|
ISIS_LSP_CLV_METRIC_IE(tvb_get_guint8(tvb, offset+2)) ? "External" : "Internal");
|
|
}
|
|
|
|
if (ISIS_LSP_CLV_METRIC_SUPPORTED(tvb_get_guint8(tvb, offset+3))) {
|
|
proto_tree_add_text (ntree, tvb, offset+3, 1, "Error Metric: Not supported");
|
|
} else {
|
|
proto_tree_add_text (ntree, tvb, offset+3, 1, "Error Metric: %d, %s",
|
|
ISIS_LSP_CLV_METRIC_VALUE(tvb_get_guint8(tvb, offset+3)),
|
|
ISIS_LSP_CLV_METRIC_IE(tvb_get_guint8(tvb, offset+3)) ? "External" : "Internal");
|
|
}
|
|
|
|
}
|
|
offset += tlen;
|
|
length -= tlen;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_l1_is_neighbors_clv()
|
|
*
|
|
* Description:
|
|
* Dispatch a l1 intermediate system neighbor by calling
|
|
* the inner function with show virtual set to TRUE and is es set to FALSE.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of IDs in packet.
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_lsp_l1_is_neighbors_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length, int length)
|
|
{
|
|
dissect_lsp_eis_neighbors_clv_inner(tvb, tree, offset,
|
|
length, id_length, TRUE, FALSE);
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_l1_es_neighbors_clv()
|
|
*
|
|
* Description:
|
|
* Dispatch a l1 end or intermediate system neighbor by calling
|
|
* the inner function with show virtual set to TRUE and es set to TRUE.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of IDs in packet.
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_lsp_l1_es_neighbors_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length, int length)
|
|
{
|
|
dissect_lsp_eis_neighbors_clv_inner(tvb, tree, offset,
|
|
length, id_length, TRUE, TRUE);
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_l2_is_neighbors_clv()
|
|
*
|
|
* Description:
|
|
* Dispatch a l2 intermediate system neighbor by calling
|
|
* the inner function with show virtual set to FALSE, and is es set
|
|
* to FALSE
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of IDs in packet.
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_lsp_l2_is_neighbors_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length, int length)
|
|
{
|
|
dissect_lsp_eis_neighbors_clv_inner(tvb, tree, offset,
|
|
length, id_length, FALSE, FALSE);
|
|
}
|
|
|
|
|
|
/*
|
|
* Name: dissect_subclv_admin_group ()
|
|
*
|
|
* Description: Called by function dissect_lsp_ext_is_reachability_clv().
|
|
*
|
|
* This function is called by dissect_lsp_ext_is_reachability_clv()
|
|
* for dissect the administrive group sub-CLV (code 3).
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out.
|
|
* int : offset into packet data where we are (beginning of the sub_clv value).
|
|
*
|
|
* Output:
|
|
* void
|
|
*/
|
|
static void
|
|
dissect_subclv_admin_group (tvbuff_t *tvb, proto_tree *tree, int offset) {
|
|
proto_item *ti;
|
|
proto_tree *ntree;
|
|
guint32 clv_value;
|
|
guint32 mask;
|
|
int i;
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset-2, 6, "Administrative group(s):");
|
|
ntree = proto_item_add_subtree (ti, ett_isis_lsp_subclv_admin_group);
|
|
|
|
clv_value = tvb_get_ntohl(tvb, offset);
|
|
mask = 1;
|
|
for (i = 0 ; i < 32 ; i++) {
|
|
if ( (clv_value & mask) != 0 ) {
|
|
proto_tree_add_text (ntree, tvb, offset, 4, "group %d", i);
|
|
}
|
|
mask <<= 1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_subclv_max_bw ()
|
|
*
|
|
* Description: Called by function dissect_lsp_ext_is_reachability_clv().
|
|
*
|
|
* This function is called by dissect_lsp_ext_is_reachability_clv()
|
|
* for dissect the maximum link bandwidth sub-CLV (code 9).
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out.
|
|
* int : offset into packet data where we are (beginning of the sub_clv value).
|
|
*
|
|
* Output:
|
|
* void
|
|
*/
|
|
static void
|
|
dissect_subclv_max_bw(tvbuff_t *tvb, proto_tree *tree, int offset)
|
|
{
|
|
gfloat bw;
|
|
|
|
bw = tvb_get_ntohieee_float(tvb, offset);
|
|
proto_tree_add_text (tree, tvb, offset-2, 6,
|
|
"Maximum link bandwidth : %.2f Mbps", bw*8/1000000 );
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_subclv_rsv_bw ()
|
|
*
|
|
* Description: Called by function dissect_lsp_ext_is_reachability_clv().
|
|
*
|
|
* This function is called by dissect_lsp_ext_is_reachability_clv()
|
|
* for dissect the reservable link bandwidth sub-CLV (code 10).
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out.
|
|
* int : offset into packet data where we are (beginning of the sub_clv value).
|
|
*
|
|
* Output:
|
|
* void
|
|
*/
|
|
static void
|
|
dissect_subclv_rsv_bw(tvbuff_t *tvb, proto_tree *tree, int offset)
|
|
{
|
|
gfloat bw;
|
|
|
|
bw = tvb_get_ntohieee_float(tvb, offset);
|
|
proto_tree_add_text (tree, tvb, offset-2, 6,
|
|
"Reservable link bandwidth: %.2f Mbps", bw*8/1000000 );
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_subclv_unrsv_bw ()
|
|
*
|
|
* Description: Called by function dissect_lsp_ext_is_reachability_clv().
|
|
*
|
|
* This function is called by dissect_lsp_ext_is_reachability_clv()
|
|
* for dissect the unreserved bandwidth sub-CLV (code 11).
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out.
|
|
* int : offset into packet data where we are (beginning of the sub_clv value).
|
|
*
|
|
* Output:
|
|
* void
|
|
*/
|
|
static void
|
|
dissect_subclv_unrsv_bw(tvbuff_t *tvb, proto_tree *tree, int offset)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *ntree;
|
|
gfloat bw;
|
|
int i;
|
|
|
|
ti = proto_tree_add_text (tree, tvb, offset-2, 34, "Unreserved bandwidth:");
|
|
ntree = proto_item_add_subtree (ti, ett_isis_lsp_subclv_unrsv_bw);
|
|
|
|
for (i = 0 ; i < 8 ; i++) {
|
|
bw = tvb_get_ntohieee_float(tvb, offset+4*i);
|
|
proto_tree_add_text (ntree, tvb, offset+4*i, 4,
|
|
"priority level %d: %.2f Mbps", i, bw*8/1000000 );
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_ext_is_reachability_clv()
|
|
*
|
|
* Description: Decode a Extended IS Reachability CLV - code 22
|
|
*
|
|
* The extended IS reachability TLV is an extended version
|
|
* of the IS reachability TLV (code 2). It encodes the metric
|
|
* as a 24-bit unsigned interger and allows to add sub-CLV(s).
|
|
*
|
|
* CALLED BY TLV 222 DISSECTOR
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of IDs in packet.
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_lsp_ext_is_reachability_clv(tvbuff_t *tvb, proto_tree *tree,
|
|
int offset, int id_length _U_, int length)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *ntree = NULL;
|
|
guint subclvs_len;
|
|
guint len, i;
|
|
guint clv_code, clv_len;
|
|
|
|
if (!tree) return;
|
|
|
|
while (length > 0) {
|
|
ti = proto_tree_add_text (tree, tvb, offset, -1,
|
|
"IS neighbor: %s",
|
|
print_system_id (tvb_get_ptr(tvb, offset, 7), 7) );
|
|
ntree = proto_item_add_subtree (ti,
|
|
ett_isis_lsp_part_of_clv_ext_is_reachability );
|
|
|
|
proto_tree_add_text (ntree, tvb, offset+7, 3,
|
|
"Metric: %d", tvb_get_ntoh24(tvb, offset+7) );
|
|
|
|
subclvs_len = tvb_get_guint8(tvb, offset+10);
|
|
if (subclvs_len == 0) {
|
|
proto_tree_add_text (ntree, tvb, offset+10, 1, "no sub-TLVs present");
|
|
}
|
|
else {
|
|
i = 0;
|
|
while (i < subclvs_len) {
|
|
clv_code = tvb_get_guint8(tvb, offset+11+i);
|
|
clv_len = tvb_get_guint8(tvb, offset+12+i);
|
|
switch (clv_code) {
|
|
case 3 :
|
|
dissect_subclv_admin_group(tvb, ntree, offset+13+i);
|
|
break;
|
|
case 6 :
|
|
proto_tree_add_text (ntree, tvb, offset+11+i, 6,
|
|
"IPv4 interface address: %s", ip_to_str (tvb_get_ptr(tvb, offset+13+i, 4)) );
|
|
break;
|
|
case 8 :
|
|
proto_tree_add_text (ntree, tvb, offset+11+i, 6,
|
|
"IPv4 neighbor address: %s", ip_to_str (tvb_get_ptr(tvb, offset+13+i, 4)) );
|
|
break;
|
|
case 9 :
|
|
dissect_subclv_max_bw (tvb, ntree, offset+13+i);
|
|
break;
|
|
case 10:
|
|
dissect_subclv_rsv_bw (tvb, ntree, offset+13+i);
|
|
break;
|
|
case 11:
|
|
dissect_subclv_unrsv_bw (tvb, ntree, offset+13+i);
|
|
break;
|
|
case 18:
|
|
proto_tree_add_text (ntree, tvb, offset+11+i, 5,
|
|
"Traffic engineering default metric: %d",
|
|
tvb_get_ntoh24(tvb, offset+13+i) );
|
|
break;
|
|
case 250:
|
|
case 251:
|
|
case 252:
|
|
case 253:
|
|
case 254:
|
|
proto_tree_add_text (ntree, tvb, offset+11+i, clv_len+2,
|
|
"Unknown Cisco specific extensions: code %d, length %d",
|
|
clv_code, clv_len );
|
|
break;
|
|
default :
|
|
proto_tree_add_text (ntree, tvb, offset+11+i, clv_len+2,
|
|
"Unknown sub-CLV: code %d, length %d", clv_code, clv_len );
|
|
break;
|
|
}
|
|
i += clv_len + 2;
|
|
}
|
|
}
|
|
|
|
len = 11 + subclvs_len;
|
|
proto_item_set_len (ti, len);
|
|
offset += len;
|
|
length -= len;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_mt_reachable_IPv4_prefx_clv()
|
|
*
|
|
* Description: Decode Multi-Topology IPv4 Prefixes - code 235
|
|
*
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of IDs in packet.
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_lsp_mt_reachable_IPv4_prefx_clv(tvbuff_t *tvb,
|
|
proto_tree *tree, int offset, int id_length _U_, int length)
|
|
{
|
|
if (!tree) return;
|
|
if (length < 2) {
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"short lsp multi-topology reachable IPv4 prefixes(%d vs %d)", length,
|
|
2 );
|
|
return;
|
|
}
|
|
dissect_lsp_mt_id(tvb, tree, offset);
|
|
dissect_lsp_ext_ip_reachability_clv(tvb, tree, offset+2, 0, length-2);
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_mt_reachable_IPv6_prefx_clv()
|
|
*
|
|
* Description: Decode Multi-Topology IPv6 Prefixes - code 237
|
|
*
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of IDs in packet.
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_lsp_mt_reachable_IPv6_prefx_clv(tvbuff_t *tvb,
|
|
proto_tree *tree, int offset, int id_length _U_, int length)
|
|
{
|
|
if (!tree) return;
|
|
if (length < 2) {
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"short lsp multi-topology reachable IPv6 prefixes(%d vs %d)", length,
|
|
2 );
|
|
return;
|
|
}
|
|
dissect_lsp_mt_id(tvb, tree, offset);
|
|
dissect_lsp_ipv6_reachability_clv(tvb, tree, offset+2, 0, length-2);
|
|
}
|
|
|
|
|
|
/*
|
|
* Name: dissect_lsp_mt_is_reachability_clv()
|
|
*
|
|
* Description: Decode Multi-Topology Intermediate Systems - code 222
|
|
*
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : unused
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
|
|
static void
|
|
dissect_lsp_mt_is_reachability_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length _U_, int length)
|
|
{
|
|
if (!tree) return;
|
|
if (length < 2) {
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"short lsp reachability(%d vs %d)", length,
|
|
2 );
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* the MT ID value dissection is used in other LSPs so we push it
|
|
* in a function
|
|
*/
|
|
dissect_lsp_mt_id(tvb, tree, offset);
|
|
/*
|
|
* fix here. No need to parse TLV 22 (with bugs) while it is
|
|
* already done correctly!!
|
|
*/
|
|
dissect_lsp_ext_is_reachability_clv(tvb, tree, offset+2, 0, length-2);
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_partition_dis_clv()
|
|
*
|
|
* Description:
|
|
* This CLV is used to indicate which system is the designated
|
|
* IS for partition repair. This means just putting out the
|
|
* "id_length"-octet IS.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of IDs in packet.
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_lsp_partition_dis_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length, int length)
|
|
{
|
|
if ( length < id_length ) {
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"short lsp partition DIS(%d vs %d)", length,
|
|
id_length );
|
|
return;
|
|
}
|
|
/*
|
|
* Gotta build a sub-tree for all our pieces
|
|
*/
|
|
if ( tree ) {
|
|
proto_tree_add_text ( tree, tvb, offset, id_length,
|
|
"Partition designated L2 IS: %s",
|
|
print_system_id( tvb_get_ptr(tvb, offset, id_length), id_length ) );
|
|
}
|
|
length -= id_length;
|
|
offset += id_length;
|
|
if ( length > 0 ){
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"Long lsp partition DIS, %d left over", length );
|
|
return;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Name: dissect_lsp_prefix_neighbors_clv()
|
|
*
|
|
* Description:
|
|
* The prefix CLV describes what other (OSI) networks we can reach
|
|
* and what their cost is. It is built from a metric block
|
|
* (see dissect_metric) followed by n addresses.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to fill out. May be NULL
|
|
* int : offset into packet data where we are.
|
|
* int : length of IDs in packet.
|
|
* int : length of clv we are decoding
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
static void
|
|
dissect_lsp_prefix_neighbors_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
|
|
int id_length _U_, int length)
|
|
{
|
|
char *sbuf;
|
|
int mylen;
|
|
|
|
if ( length < 4 ) {
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"Short lsp prefix neighbors (%d vs 4)", length );
|
|
return;
|
|
}
|
|
if ( tree ) {
|
|
dissect_metric (tvb, tree, offset,
|
|
tvb_get_guint8(tvb, offset), "Default", TRUE );
|
|
dissect_metric (tvb, tree, offset+1,
|
|
tvb_get_guint8(tvb, offset+1), "Delay", FALSE );
|
|
dissect_metric (tvb, tree, offset+2,
|
|
tvb_get_guint8(tvb, offset+2), "Expense", FALSE );
|
|
dissect_metric (tvb, tree, offset+3,
|
|
tvb_get_guint8(tvb, offset+3), "Error", FALSE );
|
|
}
|
|
offset += 4;
|
|
length -= 4;
|
|
while ( length > 0 ) {
|
|
mylen = tvb_get_guint8(tvb, offset);
|
|
length--;
|
|
if (length<=0) {
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"Zero payload space after length in prefix neighbor" );
|
|
return;
|
|
}
|
|
if ( mylen > length) {
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"Integral length of prefix neighbor too long (%d vs %d)",
|
|
mylen, length );
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Lets turn the area address into "standard" 0000.0000.etc
|
|
* format string.
|
|
*/
|
|
sbuf = print_area( tvb_get_ptr(tvb, offset+1, mylen), mylen );
|
|
/* and spit it out */
|
|
if ( tree ) {
|
|
proto_tree_add_text ( tree, tvb, offset, mylen + 1,
|
|
"Area address (%d): %s", mylen, sbuf );
|
|
}
|
|
offset += mylen + 1;
|
|
length -= mylen; /* length already adjusted for len fld*/
|
|
}
|
|
}
|
|
|
|
static void isis_lsp_checkum_additional_info(tvbuff_t * tvb, packet_info * pinfo,
|
|
proto_item * it_cksum, int offset, gboolean is_cksum_correct)
|
|
{
|
|
proto_tree * checksum_tree;
|
|
proto_item * item;
|
|
|
|
checksum_tree = proto_item_add_subtree(it_cksum, ett_isis_lsp_cksum);
|
|
item = proto_tree_add_boolean(checksum_tree, hf_isis_lsp_checksum_good, tvb,
|
|
offset, 2, is_cksum_correct);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
item = proto_tree_add_boolean(checksum_tree, hf_isis_lsp_checksum_bad, tvb,
|
|
offset, 2, !is_cksum_correct);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
if (!is_cksum_correct) {
|
|
expert_add_info_format(pinfo, item, PI_CHECKSUM, PI_ERROR, "Bad checksum");
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, " [ISIS CHECKSUM INCORRECT]");
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Name: isis_dissect_isis_lsp()
|
|
*
|
|
* Description:
|
|
* Print out the LSP part of the main header and then call the CLV
|
|
* de-mangler with the right list of valid CLVs.
|
|
*
|
|
* Input:
|
|
* tvbuff_t * : tvbuffer for packet data
|
|
* proto_tree * : protocol display tree to add to. May be NULL.
|
|
* int offset : our offset into packet data.
|
|
* int : LSP type, a la packet-isis.h ISIS_TYPE_* values
|
|
* int : header length of packet.
|
|
* int : length of IDs in packet.
|
|
*
|
|
* Output:
|
|
* void, but we will add to proto tree if !NULL.
|
|
*/
|
|
void
|
|
isis_dissect_isis_lsp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset,
|
|
int lsp_type, int header_length, int id_length)
|
|
{
|
|
proto_item *ti, *to, *ta;
|
|
proto_tree *lsp_tree = NULL, *info_tree, *att_tree;
|
|
guint16 pdu_length, lifetime, checksum, cacl_checksum=0;
|
|
guint8 lsp_info, lsp_att;
|
|
int len, offset_checksum;
|
|
proto_item *it_cksum;
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_text(tree, tvb, offset, -1,
|
|
PROTO_STRING_LSP);
|
|
lsp_tree = proto_item_add_subtree(ti, ett_isis_lsp);
|
|
}
|
|
|
|
pdu_length = tvb_get_ntohs(tvb, offset);
|
|
if (tree) {
|
|
proto_tree_add_uint(lsp_tree, hf_isis_lsp_pdu_length, tvb,
|
|
offset, 2, pdu_length);
|
|
}
|
|
offset += 2;
|
|
|
|
if (tree) {
|
|
proto_tree_add_item(lsp_tree, hf_isis_lsp_remaining_life,
|
|
tvb, offset, 2, FALSE);
|
|
}
|
|
lifetime = tvb_get_ntohs(tvb, offset);
|
|
offset += 2;
|
|
offset_checksum = offset;
|
|
|
|
if (tree) {
|
|
char* value = print_system_id( tvb_get_ptr(tvb, offset, id_length+2),
|
|
id_length+2);
|
|
proto_tree_add_string_format(lsp_tree, hf_isis_lsp_lsp_id,
|
|
tvb, offset, id_length + 2,
|
|
value, "LSP-ID: %s", value);
|
|
}
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", LSP-ID: %s",
|
|
print_system_id( tvb_get_ptr(tvb, offset, id_length+2), id_length+2 ) );
|
|
}
|
|
offset += id_length + 2;
|
|
|
|
if (tree) {
|
|
proto_tree_add_item(lsp_tree, hf_isis_lsp_sequence_number,
|
|
tvb, offset, 4, FALSE);
|
|
}
|
|
if (check_col(pinfo->cinfo, COL_INFO)) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, ", Sequence: 0x%08x, Lifetime: %5us",
|
|
tvb_get_ntohl(tvb, offset),
|
|
tvb_get_ntohs(tvb, offset - (id_length+2+2)));
|
|
}
|
|
offset += 4;
|
|
|
|
if (tree) {
|
|
checksum = lifetime ? tvb_get_ntohs(tvb, offset) : 0;
|
|
switch (check_and_get_checksum(tvb, offset_checksum, pdu_length-12, checksum, offset, &cacl_checksum))
|
|
{
|
|
case NO_CKSUM :
|
|
checksum = tvb_get_ntohs(tvb, offset);
|
|
proto_tree_add_uint_format(lsp_tree, hf_isis_lsp_checksum, tvb, offset, 2, checksum,
|
|
"Checksum: 0x%04x [unused]", checksum);
|
|
break;
|
|
case DATA_MISSING :
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"[packet length %d went beyond packet]",
|
|
tvb_length_remaining(tvb, offset_checksum));
|
|
break;
|
|
case CKSUM_NOT_OK :
|
|
it_cksum = proto_tree_add_uint_format(lsp_tree, hf_isis_lsp_checksum, tvb, offset, 2, checksum,
|
|
"Checksum: 0x%04x [incorrect, should be 0x%04x]",
|
|
checksum, cacl_checksum);
|
|
isis_lsp_checkum_additional_info(tvb, pinfo, it_cksum, offset, FALSE);
|
|
break;
|
|
case CKSUM_OK :
|
|
it_cksum = proto_tree_add_uint_format(lsp_tree, hf_isis_lsp_checksum, tvb, offset, 2, checksum,
|
|
"Checksum: 0x%04x [correct]", checksum);
|
|
isis_lsp_checkum_additional_info(tvb, pinfo, it_cksum, offset, TRUE);
|
|
break;
|
|
default :
|
|
g_message("'check_and_get_checksum' returned an invalid value");
|
|
}
|
|
}
|
|
offset += 2;
|
|
|
|
if (tree) {
|
|
/*
|
|
* P | ATT | HIPPITY | IS TYPE description.
|
|
*/
|
|
lsp_info = tvb_get_guint8(tvb, offset);
|
|
to = proto_tree_add_text(lsp_tree, tvb, offset, 1,
|
|
"Type block(0x%02x): Partition Repair:%d, Attached bits:%d, Overload bit:%d, IS type:%d",
|
|
lsp_info,
|
|
ISIS_LSP_PARTITION(lsp_info),
|
|
ISIS_LSP_ATT(lsp_info),
|
|
ISIS_LSP_HIPPITY(lsp_info),
|
|
ISIS_LSP_IS_TYPE(lsp_info)
|
|
);
|
|
|
|
info_tree = proto_item_add_subtree(to, ett_isis_lsp_info);
|
|
proto_tree_add_boolean(info_tree, hf_isis_lsp_p, tvb, offset, 1, lsp_info);
|
|
ta = proto_tree_add_uint(info_tree, hf_isis_lsp_att, tvb, offset, 1, lsp_info);
|
|
att_tree = proto_item_add_subtree(ta, ett_isis_lsp_att);
|
|
lsp_att = ISIS_LSP_ATT(lsp_info);
|
|
proto_tree_add_text(att_tree, tvb, offset, 1,
|
|
"%d... = Error metric: %s", ISIS_LSP_ATT_ERROR(lsp_att), ISIS_LSP_ATT_ERROR(lsp_att) ? "Set" : "Unset");
|
|
proto_tree_add_text(att_tree, tvb, offset, 1,
|
|
".%d.. = Expense metric: %s", ISIS_LSP_ATT_EXPENSE(lsp_att), ISIS_LSP_ATT_EXPENSE(lsp_att) ? "Set" : "Unset");
|
|
proto_tree_add_text(att_tree, tvb, offset, 1,
|
|
"..%d. = Delay metric: %s", ISIS_LSP_ATT_DELAY(lsp_att), ISIS_LSP_ATT_DELAY(lsp_att) ? "Set" : "Unset");
|
|
proto_tree_add_text(att_tree, tvb, offset, 1,
|
|
"...%d = Default metric: %s", ISIS_LSP_ATT_DEFAULT(lsp_att), ISIS_LSP_ATT_DEFAULT(lsp_att) ? "Set" : "Unset");
|
|
proto_tree_add_boolean(info_tree, hf_isis_lsp_hippity, tvb, offset, 1, lsp_info);
|
|
proto_tree_add_uint(info_tree, hf_isis_lsp_is_type, tvb, offset, 1, lsp_info);
|
|
}
|
|
offset += 1;
|
|
|
|
len = pdu_length - header_length;
|
|
if (len < 0) {
|
|
isis_dissect_unknown(tvb, tree, offset,
|
|
"packet header length %d went beyond packet",
|
|
header_length );
|
|
return;
|
|
}
|
|
/*
|
|
* Now, we need to decode our CLVs. We need to pass in
|
|
* our list of valid ones!
|
|
*/
|
|
if (lsp_type == ISIS_TYPE_L1_LSP){
|
|
isis_dissect_clvs(tvb, lsp_tree, offset,
|
|
clv_l1_lsp_opts, len, id_length,
|
|
ett_isis_lsp_clv_unknown );
|
|
} else {
|
|
isis_dissect_clvs(tvb, lsp_tree, offset,
|
|
clv_l2_lsp_opts, len, id_length,
|
|
ett_isis_lsp_clv_unknown );
|
|
}
|
|
}
|
|
/*
|
|
* Name: isis_register_lsp()
|
|
*
|
|
* Description:
|
|
* Register our protocol sub-sets with protocol manager.
|
|
*
|
|
* Input:
|
|
* int : protocol index for the ISIS protocol
|
|
*
|
|
* Output:
|
|
* void
|
|
*/
|
|
void
|
|
isis_register_lsp(int proto_isis) {
|
|
static hf_register_info hf[] = {
|
|
{ &hf_isis_lsp_pdu_length,
|
|
{ "PDU length", "isis.lsp.pdu_length", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_isis_lsp_remaining_life,
|
|
{ "Remaining lifetime", "isis.lsp.remaining_life", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_isis_lsp_lsp_id,
|
|
{ "LSP-ID", "isis.lsp.lsp_id", FT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_isis_lsp_hostname,
|
|
{ "Hostname", "isis.lsp.hostname", FT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_isis_lsp_sequence_number,
|
|
{ "Sequence number", "isis.lsp.sequence_number",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_isis_lsp_checksum,
|
|
{ "Checksum", "isis.lsp.checksum",FT_UINT16,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_isis_lsp_checksum_good,
|
|
{ "Good Checksum", "isis.lsp.checksum_good", FT_BOOLEAN, BASE_NONE,
|
|
NULL, 0x0, "Good IS-IS LSP Checksum", HFILL }},
|
|
|
|
{ &hf_isis_lsp_checksum_bad,
|
|
{ "Bad Checksum", "isis.lsp.checksum_bad", FT_BOOLEAN, BASE_NONE,
|
|
NULL, 0x0, "Bad IS-IS LSP Checksum", HFILL }},
|
|
|
|
{ &hf_isis_lsp_clv_ipv4_int_addr,
|
|
{ "IPv4 interface address", "isis.lsp.clv_ipv4_int_addr", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_isis_lsp_clv_ipv6_int_addr,
|
|
{ "IPv6 interface address", "isis.lsp.clv_ipv6_int_addr", FT_IPv6,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_isis_lsp_clv_te_router_id,
|
|
{ "Traffic Engineering Router ID", "isis.lsp.clv_te_router_id", FT_IPv4,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_isis_lsp_clv_mt,
|
|
{ "MT-ID", "isis.lsp.clv_mt",
|
|
FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }},
|
|
|
|
{ &hf_isis_lsp_p,
|
|
{ "Partition Repair", "isis.lsp.partition_repair", FT_BOOLEAN, 8,
|
|
TFS(&tfs_supported_not_supported), ISIS_LSP_PARTITION_MASK,
|
|
"If set, this router supports the optional Partition Repair function", HFILL }},
|
|
|
|
{ &hf_isis_lsp_att,
|
|
{ "Attachment", "isis.lsp.att", FT_UINT8, BASE_DEC,
|
|
NULL, ISIS_LSP_ATT_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_isis_lsp_hippity,
|
|
{ "Overload bit", "isis.lsp.overload", FT_BOOLEAN, 8,
|
|
TFS(&tfs_set_notset), ISIS_LSP_HIPPITY_MASK,
|
|
"If set, this router will not be used by any decision process to calculate routes", HFILL }},
|
|
|
|
{ &hf_isis_lsp_is_type,
|
|
{ "Type of Intermediate System", "isis.lsp.is_type", FT_UINT8, BASE_DEC,
|
|
VALS(isis_lsp_istype_vals), ISIS_LSP_IS_TYPE_MASK,
|
|
NULL, HFILL }}
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_isis_lsp,
|
|
&ett_isis_lsp_info,
|
|
&ett_isis_lsp_att,
|
|
&ett_isis_lsp_cksum,
|
|
&ett_isis_lsp_clv_area_addr,
|
|
&ett_isis_lsp_clv_is_neighbors,
|
|
&ett_isis_lsp_clv_ext_is_reachability, /* CLV 22 */
|
|
&ett_isis_lsp_part_of_clv_ext_is_reachability,
|
|
&ett_isis_lsp_subclv_admin_group,
|
|
&ett_isis_lsp_subclv_unrsv_bw,
|
|
&ett_isis_lsp_clv_unknown,
|
|
&ett_isis_lsp_clv_partition_dis,
|
|
&ett_isis_lsp_clv_prefix_neighbors,
|
|
&ett_isis_lsp_clv_authentication,
|
|
&ett_isis_lsp_clv_ip_authentication,
|
|
&ett_isis_lsp_clv_nlpid,
|
|
&ett_isis_lsp_clv_hostname,
|
|
&ett_isis_lsp_clv_ipv4_int_addr,
|
|
&ett_isis_lsp_clv_ipv6_int_addr, /* CLV 232 */
|
|
&ett_isis_lsp_clv_te_router_id,
|
|
&ett_isis_lsp_clv_ip_reachability,
|
|
&ett_isis_lsp_clv_ip_reach_subclv,
|
|
&ett_isis_lsp_clv_ext_ip_reachability, /* CLV 135 */
|
|
&ett_isis_lsp_part_of_clv_ext_ip_reachability,
|
|
&ett_isis_lsp_clv_ipv6_reachability, /* CLV 236 */
|
|
&ett_isis_lsp_part_of_clv_ipv6_reachability,
|
|
&ett_isis_lsp_clv_mt,
|
|
&ett_isis_lsp_clv_mt_is,
|
|
&ett_isis_lsp_part_of_clv_mt_is,
|
|
&ett_isis_lsp_clv_mt_reachable_IPv4_prefx,
|
|
&ett_isis_lsp_clv_mt_reachable_IPv6_prefx
|
|
};
|
|
|
|
proto_register_field_array(proto_isis, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|