1/* 2 * Copyright (c) 1992, 1993, 1994, 1995, 1996 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 * 21 * Original code by Matt Thomas, Digital Equipment Corporation 22 * 23 * Extensively modified by Hannes Gredler (hannes@juniper.net) for more 24 * complete IS-IS & CLNP support. 25 */ 26 27#ifndef lint 28static const char rcsid[] _U_ = 29 "@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.165 2008-08-16 13:38:15 hannes Exp $ (LBL)"; 30#endif 31 32#ifdef HAVE_CONFIG_H 33#include "config.h" 34#endif 35 36#include <tcpdump-stdinc.h> 37 38#include <stdio.h> 39#include <string.h> 40 41#include "interface.h" 42#include "addrtoname.h" 43#include "ethertype.h" 44#include "ether.h" 45#include "nlpid.h" 46#include "extract.h" 47#include "gmpls.h" 48#include "oui.h" 49#include "signature.h" 50 51/* 52 * IS-IS is defined in ISO 10589. Look there for protocol definitions. 53 */ 54 55#define SYSTEM_ID_LEN ETHER_ADDR_LEN 56#define NODE_ID_LEN SYSTEM_ID_LEN+1 57#define LSP_ID_LEN SYSTEM_ID_LEN+2 58 59#define ISIS_VERSION 1 60#define ESIS_VERSION 1 61#define CLNP_VERSION 1 62 63#define ISIS_PDU_TYPE_MASK 0x1F 64#define ESIS_PDU_TYPE_MASK 0x1F 65#define CLNP_PDU_TYPE_MASK 0x1F 66#define CLNP_FLAG_MASK 0xE0 67#define ISIS_LAN_PRIORITY_MASK 0x7F 68 69#define ISIS_PDU_L1_LAN_IIH 15 70#define ISIS_PDU_L2_LAN_IIH 16 71#define ISIS_PDU_PTP_IIH 17 72#define ISIS_PDU_L1_LSP 18 73#define ISIS_PDU_L2_LSP 20 74#define ISIS_PDU_L1_CSNP 24 75#define ISIS_PDU_L2_CSNP 25 76#define ISIS_PDU_L1_PSNP 26 77#define ISIS_PDU_L2_PSNP 27 78 79static struct tok isis_pdu_values[] = { 80 { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"}, 81 { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"}, 82 { ISIS_PDU_PTP_IIH, "p2p IIH"}, 83 { ISIS_PDU_L1_LSP, "L1 LSP"}, 84 { ISIS_PDU_L2_LSP, "L2 LSP"}, 85 { ISIS_PDU_L1_CSNP, "L1 CSNP"}, 86 { ISIS_PDU_L2_CSNP, "L2 CSNP"}, 87 { ISIS_PDU_L1_PSNP, "L1 PSNP"}, 88 { ISIS_PDU_L2_PSNP, "L2 PSNP"}, 89 { 0, NULL} 90}; 91 92/* 93 * A TLV is a tuple of a type, length and a value and is normally used for 94 * encoding information in all sorts of places. This is an enumeration of 95 * the well known types. 96 * 97 * list taken from rfc3359 plus some memory from veterans ;-) 98 */ 99 100#define ISIS_TLV_AREA_ADDR 1 /* iso10589 */ 101#define ISIS_TLV_IS_REACH 2 /* iso10589 */ 102#define ISIS_TLV_ESNEIGH 3 /* iso10589 */ 103#define ISIS_TLV_PART_DIS 4 /* iso10589 */ 104#define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */ 105#define ISIS_TLV_ISNEIGH 6 /* iso10589 */ 106#define ISIS_TLV_ISNEIGH_VARLEN 7 /* iso10589 */ 107#define ISIS_TLV_PADDING 8 /* iso10589 */ 108#define ISIS_TLV_LSP 9 /* iso10589 */ 109#define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */ 110#define ISIS_TLV_CHECKSUM 12 /* rfc3358 */ 111#define ISIS_TLV_CHECKSUM_MINLEN 2 112#define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */ 113#define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2 114#define ISIS_TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */ 115#define ISIS_TLV_IS_ALIAS_ID 24 /* draft-ietf-isis-ext-lsp-frags-02 */ 116#define ISIS_TLV_DECNET_PHASE4 42 117#define ISIS_TLV_LUCENT_PRIVATE 66 118#define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */ 119#define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */ 120#define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */ 121#define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */ 122#define ISIS_TLV_IDRP_INFO_MINLEN 1 123#define ISIS_TLV_IPADDR 132 /* rfc1195 */ 124#define ISIS_TLV_IPAUTH 133 /* rfc1195 */ 125#define ISIS_TLV_TE_ROUTER_ID 134 /* draft-ietf-isis-traffic-05 */ 126#define ISIS_TLV_EXTD_IP_REACH 135 /* draft-ietf-isis-traffic-05 */ 127#define ISIS_TLV_HOSTNAME 137 /* rfc2763 */ 128#define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */ 129#define ISIS_TLV_MT_PORT_CAP 143 /* rfc6165 */ 130#define ISIS_TLV_MT_CAPABILITY 144 /* rfc6329 */ 131#define ISIS_TLV_NORTEL_PRIVATE1 176 132#define ISIS_TLV_NORTEL_PRIVATE2 177 133#define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */ 134#define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1 135#define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2 136#define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */ 137#define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */ 138#define ISIS_TLV_MT_SUPPORTED_MINLEN 2 139#define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */ 140#define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */ 141#define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */ 142#define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */ 143#define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */ 144#define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */ 145#define ISIS_TLV_IIH_SEQNR_MINLEN 4 146#define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */ 147#define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3 148 149static struct tok isis_tlv_values[] = { 150 { ISIS_TLV_AREA_ADDR, "Area address(es)"}, 151 { ISIS_TLV_IS_REACH, "IS Reachability"}, 152 { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"}, 153 { ISIS_TLV_PART_DIS, "Partition DIS"}, 154 { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"}, 155 { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"}, 156 { ISIS_TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"}, 157 { ISIS_TLV_PADDING, "Padding"}, 158 { ISIS_TLV_LSP, "LSP entries"}, 159 { ISIS_TLV_AUTH, "Authentication"}, 160 { ISIS_TLV_CHECKSUM, "Checksum"}, 161 { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"}, 162 { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"}, 163 { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"}, 164 { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"}, 165 { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"}, 166 { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"}, 167 { ISIS_TLV_PROTOCOLS, "Protocols supported"}, 168 { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"}, 169 { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"}, 170 { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"}, 171 { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"}, 172 { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"}, 173 { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"}, 174 { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"}, 175 { ISIS_TLV_MT_PORT_CAP, "Multi-Topology-Aware Port Capability"}, 176 { ISIS_TLV_MT_CAPABILITY, "Multi-Topology Capability"}, 177 { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"}, 178 { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"}, 179 { ISIS_TLV_HOSTNAME, "Hostname"}, 180 { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"}, 181 { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"}, 182 { ISIS_TLV_MT_SUPPORTED, "Multi Topology"}, 183 { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"}, 184 { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"}, 185 { ISIS_TLV_IP6_REACH, "IPv6 reachability"}, 186 { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"}, 187 { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"}, 188 { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"}, 189 { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"}, 190 { 0, NULL } 191}; 192 193#define ESIS_OPTION_PROTOCOLS 129 194#define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */ 195#define ESIS_OPTION_SECURITY 197 /* iso9542 */ 196#define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */ 197#define ESIS_OPTION_PRIORITY 205 /* iso9542 */ 198#define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */ 199#define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */ 200 201static struct tok esis_option_values[] = { 202 { ESIS_OPTION_PROTOCOLS, "Protocols supported"}, 203 { ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" }, 204 { ESIS_OPTION_SECURITY, "Security" }, 205 { ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" }, 206 { ESIS_OPTION_PRIORITY, "Priority" }, 207 { ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" }, 208 { ESIS_OPTION_SNPA_MASK, "SNPA Mask" }, 209 { 0, NULL } 210}; 211 212#define CLNP_OPTION_DISCARD_REASON 193 213#define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */ 214#define CLNP_OPTION_SECURITY 197 /* iso8473 */ 215#define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */ 216#define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */ 217#define CLNP_OPTION_PADDING 204 /* iso8473 */ 218#define CLNP_OPTION_PRIORITY 205 /* iso8473 */ 219 220static struct tok clnp_option_values[] = { 221 { CLNP_OPTION_DISCARD_REASON, "Discard Reason"}, 222 { CLNP_OPTION_PRIORITY, "Priority"}, 223 { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"}, 224 { CLNP_OPTION_SECURITY, "Security"}, 225 { CLNP_OPTION_SOURCE_ROUTING, "Source Routing"}, 226 { CLNP_OPTION_ROUTE_RECORDING, "Route Recording"}, 227 { CLNP_OPTION_PADDING, "Padding"}, 228 { 0, NULL } 229}; 230 231static struct tok clnp_option_rfd_class_values[] = { 232 { 0x0, "General"}, 233 { 0x8, "Address"}, 234 { 0x9, "Source Routeing"}, 235 { 0xa, "Lifetime"}, 236 { 0xb, "PDU Discarded"}, 237 { 0xc, "Reassembly"}, 238 { 0, NULL } 239}; 240 241static struct tok clnp_option_rfd_general_values[] = { 242 { 0x0, "Reason not specified"}, 243 { 0x1, "Protocol procedure error"}, 244 { 0x2, "Incorrect checksum"}, 245 { 0x3, "PDU discarded due to congestion"}, 246 { 0x4, "Header syntax error (cannot be parsed)"}, 247 { 0x5, "Segmentation needed but not permitted"}, 248 { 0x6, "Incomplete PDU received"}, 249 { 0x7, "Duplicate option"}, 250 { 0, NULL } 251}; 252 253static struct tok clnp_option_rfd_address_values[] = { 254 { 0x0, "Destination address unreachable"}, 255 { 0x1, "Destination address unknown"}, 256 { 0, NULL } 257}; 258 259static struct tok clnp_option_rfd_source_routeing_values[] = { 260 { 0x0, "Unspecified source routeing error"}, 261 { 0x1, "Syntax error in source routeing field"}, 262 { 0x2, "Unknown address in source routeing field"}, 263 { 0x3, "Path not acceptable"}, 264 { 0, NULL } 265}; 266 267static struct tok clnp_option_rfd_lifetime_values[] = { 268 { 0x0, "Lifetime expired while data unit in transit"}, 269 { 0x1, "Lifetime expired during reassembly"}, 270 { 0, NULL } 271}; 272 273static struct tok clnp_option_rfd_pdu_discard_values[] = { 274 { 0x0, "Unsupported option not specified"}, 275 { 0x1, "Unsupported protocol version"}, 276 { 0x2, "Unsupported security option"}, 277 { 0x3, "Unsupported source routeing option"}, 278 { 0x4, "Unsupported recording of route option"}, 279 { 0, NULL } 280}; 281 282static struct tok clnp_option_rfd_reassembly_values[] = { 283 { 0x0, "Reassembly interference"}, 284 { 0, NULL } 285}; 286 287/* array of 16 error-classes */ 288static struct tok *clnp_option_rfd_error_class[] = { 289 clnp_option_rfd_general_values, 290 NULL, 291 NULL, 292 NULL, 293 NULL, 294 NULL, 295 NULL, 296 NULL, 297 clnp_option_rfd_address_values, 298 clnp_option_rfd_source_routeing_values, 299 clnp_option_rfd_lifetime_values, 300 clnp_option_rfd_pdu_discard_values, 301 clnp_option_rfd_reassembly_values, 302 NULL, 303 NULL, 304 NULL 305}; 306 307#define CLNP_OPTION_OPTION_QOS_MASK 0x3f 308#define CLNP_OPTION_SCOPE_MASK 0xc0 309#define CLNP_OPTION_SCOPE_SA_SPEC 0x40 310#define CLNP_OPTION_SCOPE_DA_SPEC 0x80 311#define CLNP_OPTION_SCOPE_GLOBAL 0xc0 312 313static struct tok clnp_option_scope_values[] = { 314 { CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"}, 315 { CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"}, 316 { CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"}, 317 { 0, NULL } 318}; 319 320static struct tok clnp_option_sr_rr_values[] = { 321 { 0x0, "partial"}, 322 { 0x1, "complete"}, 323 { 0, NULL } 324}; 325 326static struct tok clnp_option_sr_rr_string_values[] = { 327 { CLNP_OPTION_SOURCE_ROUTING, "source routing"}, 328 { CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"}, 329 { 0, NULL } 330}; 331 332static struct tok clnp_option_qos_global_values[] = { 333 { 0x20, "reserved"}, 334 { 0x10, "sequencing vs. delay"}, 335 { 0x08, "congested"}, 336 { 0x04, "delay vs. cost"}, 337 { 0x02, "error vs. delay"}, 338 { 0x01, "error vs. cost"}, 339 { 0, NULL } 340}; 341 342#define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */ 343#define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */ 344#define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */ 345#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* draft-ietf-isis-traffic-05 */ 346#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* draft-ietf-isis-traffic-05 */ 347#define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* draft-ietf-isis-traffic-05 */ 348#define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* draft-ietf-isis-traffic-05 */ 349#define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */ 350#define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */ 351#define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* draft-ietf-isis-traffic-05 */ 352#define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */ 353#define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */ 354#define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */ 355#define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */ 356 357#define ISIS_SUBTLV_SPB_METRIC 29 /* rfc6329 */ 358 359static struct tok isis_ext_is_reach_subtlv_values[] = { 360 { ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" }, 361 { ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" }, 362 { ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" }, 363 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" }, 364 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" }, 365 { ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" }, 366 { ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" }, 367 { ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" }, 368 { ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" }, 369 { ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" }, 370 { ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" }, 371 { ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" }, 372 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" }, 373 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" }, 374 { ISIS_SUBTLV_SPB_METRIC, "SPB Metric" }, 375 { 250, "Reserved for cisco specific extensions" }, 376 { 251, "Reserved for cisco specific extensions" }, 377 { 252, "Reserved for cisco specific extensions" }, 378 { 253, "Reserved for cisco specific extensions" }, 379 { 254, "Reserved for cisco specific extensions" }, 380 { 255, "Reserved for future expansion" }, 381 { 0, NULL } 382}; 383 384#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */ 385#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */ 386#define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */ 387 388static struct tok isis_ext_ip_reach_subtlv_values[] = { 389 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" }, 390 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" }, 391 { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" }, 392 { 0, NULL } 393}; 394 395static struct tok isis_subtlv_link_attribute_values[] = { 396 { 0x01, "Local Protection Available" }, 397 { 0x02, "Link excluded from local protection path" }, 398 { 0x04, "Local maintenance required"}, 399 { 0, NULL } 400}; 401 402#define ISIS_SUBTLV_AUTH_SIMPLE 1 403#define ISIS_SUBTLV_AUTH_GENERIC 3 /* rfc 5310 */ 404#define ISIS_SUBTLV_AUTH_MD5 54 405#define ISIS_SUBTLV_AUTH_MD5_LEN 16 406#define ISIS_SUBTLV_AUTH_PRIVATE 255 407 408static struct tok isis_subtlv_auth_values[] = { 409 { ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"}, 410 { ISIS_SUBTLV_AUTH_GENERIC, "Generic Crypto key-id"}, 411 { ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"}, 412 { ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"}, 413 { 0, NULL } 414}; 415 416#define ISIS_SUBTLV_IDRP_RES 0 417#define ISIS_SUBTLV_IDRP_LOCAL 1 418#define ISIS_SUBTLV_IDRP_ASN 2 419 420static struct tok isis_subtlv_idrp_values[] = { 421 { ISIS_SUBTLV_IDRP_RES, "Reserved"}, 422 { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"}, 423 { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"}, 424 { 0, NULL} 425}; 426 427#define ISIS_SUBTLV_SPB_MCID 4 428#define ISIS_SUBTLV_SPB_DIGEST 5 429#define ISIS_SUBTLV_SPB_BVID 6 430 431#define ISIS_SUBTLV_SPB_INSTANCE 1 432#define ISIS_SUBTLV_SPBM_SI 3 433 434#define ISIS_SPB_MCID_LEN 51 435#define ISIS_SUBTLV_SPB_MCID_MIN_LEN 102 436#define ISIS_SUBTLV_SPB_DIGEST_MIN_LEN 33 437#define ISIS_SUBTLV_SPB_BVID_MIN_LEN 6 438#define ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN 19 439#define ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN 8 440 441static struct tok isis_mt_port_cap_subtlv_values[] = { 442 { ISIS_SUBTLV_SPB_MCID, "SPB MCID" }, 443 { ISIS_SUBTLV_SPB_DIGEST, "SPB Digest" }, 444 { ISIS_SUBTLV_SPB_BVID, "SPB BVID" }, 445 { 0, NULL } 446}; 447 448static struct tok isis_mt_capability_subtlv_values[] = { 449 { ISIS_SUBTLV_SPB_INSTANCE, "SPB Instance" }, 450 { ISIS_SUBTLV_SPBM_SI, "SPBM Service Identifier and Unicast Address" }, 451 { 0, NULL } 452}; 453 454struct isis_spb_mcid { 455 u_int8_t format_id; 456 u_int8_t name[32]; 457 u_int8_t revision_lvl[2]; 458 u_int8_t digest[16]; 459}; 460 461struct isis_subtlv_spb_mcid { 462 struct isis_spb_mcid mcid; 463 struct isis_spb_mcid aux_mcid; 464}; 465 466struct isis_subtlv_spb_instance { 467 u_int8_t cist_root_id[8]; 468 u_int8_t cist_external_root_path_cost[4]; 469 u_int8_t bridge_priority[2]; 470 u_int8_t spsourceid[4]; 471 u_int8_t no_of_trees; 472}; 473 474#define CLNP_SEGMENT_PART 0x80 475#define CLNP_MORE_SEGMENTS 0x40 476#define CLNP_REQUEST_ER 0x20 477 478static struct tok clnp_flag_values[] = { 479 { CLNP_SEGMENT_PART, "Segmentation permitted"}, 480 { CLNP_MORE_SEGMENTS, "more Segments"}, 481 { CLNP_REQUEST_ER, "request Error Report"}, 482 { 0, NULL} 483}; 484 485#define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4) 486#define ISIS_MASK_LSP_ISTYPE_BITS(x) ((x)&0x3) 487#define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80) 488#define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78) 489#define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40) 490#define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20) 491#define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10) 492#define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8) 493 494#define ISIS_MASK_MTID(x) ((x)&0x0fff) 495#define ISIS_MASK_MTFLAGS(x) ((x)&0xf000) 496 497static struct tok isis_mt_flag_values[] = { 498 { 0x4000, "ATT bit set"}, 499 { 0x8000, "Overload bit set"}, 500 { 0, NULL} 501}; 502 503#define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80) 504#define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40) 505 506#define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40) 507#define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20) 508 509#define ISIS_LSP_TLV_METRIC_SUPPORTED(x) ((x)&0x80) 510#define ISIS_LSP_TLV_METRIC_IE(x) ((x)&0x40) 511#define ISIS_LSP_TLV_METRIC_UPDOWN(x) ((x)&0x80) 512#define ISIS_LSP_TLV_METRIC_VALUE(x) ((x)&0x3f) 513 514#define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1) 515 516static struct tok isis_mt_values[] = { 517 { 0, "IPv4 unicast"}, 518 { 1, "In-Band Management"}, 519 { 2, "IPv6 unicast"}, 520 { 3, "Multicast"}, 521 { 4095, "Development, Experimental or Proprietary"}, 522 { 0, NULL } 523}; 524 525static struct tok isis_iih_circuit_type_values[] = { 526 { 1, "Level 1 only"}, 527 { 2, "Level 2 only"}, 528 { 3, "Level 1, Level 2"}, 529 { 0, NULL} 530}; 531 532#define ISIS_LSP_TYPE_UNUSED0 0 533#define ISIS_LSP_TYPE_LEVEL_1 1 534#define ISIS_LSP_TYPE_UNUSED2 2 535#define ISIS_LSP_TYPE_LEVEL_2 3 536 537static struct tok isis_lsp_istype_values[] = { 538 { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"}, 539 { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"}, 540 { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"}, 541 { ISIS_LSP_TYPE_LEVEL_2, "L2 IS"}, 542 { 0, NULL } 543}; 544 545/* 546 * Katz's point to point adjacency TLV uses codes to tell us the state of 547 * the remote adjacency. Enumerate them. 548 */ 549 550#define ISIS_PTP_ADJ_UP 0 551#define ISIS_PTP_ADJ_INIT 1 552#define ISIS_PTP_ADJ_DOWN 2 553 554static struct tok isis_ptp_adjancey_values[] = { 555 { ISIS_PTP_ADJ_UP, "Up" }, 556 { ISIS_PTP_ADJ_INIT, "Initializing" }, 557 { ISIS_PTP_ADJ_DOWN, "Down" }, 558 { 0, NULL} 559}; 560 561struct isis_tlv_ptp_adj { 562 u_int8_t adjacency_state; 563 u_int8_t extd_local_circuit_id[4]; 564 u_int8_t neighbor_sysid[SYSTEM_ID_LEN]; 565 u_int8_t neighbor_extd_local_circuit_id[4]; 566}; 567 568static void osi_print_cksum(const u_int8_t *pptr, u_int16_t checksum, 569 u_int checksum_offset, u_int length); 570static int clnp_print(const u_int8_t *, u_int); 571static void esis_print(const u_int8_t *, u_int); 572static int isis_print(const u_int8_t *, u_int); 573 574struct isis_metric_block { 575 u_int8_t metric_default; 576 u_int8_t metric_delay; 577 u_int8_t metric_expense; 578 u_int8_t metric_error; 579}; 580 581struct isis_tlv_is_reach { 582 struct isis_metric_block isis_metric_block; 583 u_int8_t neighbor_nodeid[NODE_ID_LEN]; 584}; 585 586struct isis_tlv_es_reach { 587 struct isis_metric_block isis_metric_block; 588 u_int8_t neighbor_sysid[SYSTEM_ID_LEN]; 589}; 590 591struct isis_tlv_ip_reach { 592 struct isis_metric_block isis_metric_block; 593 u_int8_t prefix[4]; 594 u_int8_t mask[4]; 595}; 596 597static struct tok isis_is_reach_virtual_values[] = { 598 { 0, "IsNotVirtual"}, 599 { 1, "IsVirtual"}, 600 { 0, NULL } 601}; 602 603static struct tok isis_restart_flag_values[] = { 604 { 0x1, "Restart Request"}, 605 { 0x2, "Restart Acknowledgement"}, 606 { 0x4, "Suppress adjacency advertisement"}, 607 { 0, NULL } 608}; 609 610struct isis_common_header { 611 u_int8_t nlpid; 612 u_int8_t fixed_len; 613 u_int8_t version; /* Protocol version */ 614 u_int8_t id_length; 615 u_int8_t pdu_type; /* 3 MSbits are reserved */ 616 u_int8_t pdu_version; /* Packet format version */ 617 u_int8_t reserved; 618 u_int8_t max_area; 619}; 620 621struct isis_iih_lan_header { 622 u_int8_t circuit_type; 623 u_int8_t source_id[SYSTEM_ID_LEN]; 624 u_int8_t holding_time[2]; 625 u_int8_t pdu_len[2]; 626 u_int8_t priority; 627 u_int8_t lan_id[NODE_ID_LEN]; 628}; 629 630struct isis_iih_ptp_header { 631 u_int8_t circuit_type; 632 u_int8_t source_id[SYSTEM_ID_LEN]; 633 u_int8_t holding_time[2]; 634 u_int8_t pdu_len[2]; 635 u_int8_t circuit_id; 636}; 637 638struct isis_lsp_header { 639 u_int8_t pdu_len[2]; 640 u_int8_t remaining_lifetime[2]; 641 u_int8_t lsp_id[LSP_ID_LEN]; 642 u_int8_t sequence_number[4]; 643 u_int8_t checksum[2]; 644 u_int8_t typeblock; 645}; 646 647struct isis_csnp_header { 648 u_int8_t pdu_len[2]; 649 u_int8_t source_id[NODE_ID_LEN]; 650 u_int8_t start_lsp_id[LSP_ID_LEN]; 651 u_int8_t end_lsp_id[LSP_ID_LEN]; 652}; 653 654struct isis_psnp_header { 655 u_int8_t pdu_len[2]; 656 u_int8_t source_id[NODE_ID_LEN]; 657}; 658 659struct isis_tlv_lsp { 660 u_int8_t remaining_lifetime[2]; 661 u_int8_t lsp_id[LSP_ID_LEN]; 662 u_int8_t sequence_number[4]; 663 u_int8_t checksum[2]; 664}; 665 666#define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header)) 667#define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header)) 668#define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header)) 669#define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header)) 670#define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header)) 671#define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header)) 672 673void isoclns_print(const u_int8_t *p, u_int length, u_int caplen) 674{ 675 if (caplen <= 1) { /* enough bytes on the wire ? */ 676 printf("|OSI"); 677 return; 678 } 679 680 if (eflag) 681 printf("OSI NLPID %s (0x%02x): ", 682 tok2str(nlpid_values,"Unknown",*p), 683 *p); 684 685 switch (*p) { 686 687 case NLPID_CLNP: 688 if (!clnp_print(p, length)) 689 print_unknown_data(p,"\n\t",caplen); 690 break; 691 692 case NLPID_ESIS: 693 esis_print(p, length); 694 return; 695 696 case NLPID_ISIS: 697 if (!isis_print(p, length)) 698 print_unknown_data(p,"\n\t",caplen); 699 break; 700 701 case NLPID_NULLNS: 702 (void)printf("%slength: %u", 703 eflag ? "" : ", ", 704 length); 705 break; 706 707 case NLPID_Q933: 708 q933_print(p+1, length-1); 709 break; 710 711 case NLPID_IP: 712 ip_print(gndo, p+1, length-1); 713 break; 714 715#ifdef INET6 716 case NLPID_IP6: 717 ip6_print(gndo, p+1, length-1); 718 break; 719#endif 720 721 case NLPID_PPP: 722 ppp_print(p+1, length-1); 723 break; 724 725 default: 726 if (!eflag) 727 printf("OSI NLPID 0x%02x unknown",*p); 728 (void)printf("%slength: %u", 729 eflag ? "" : ", ", 730 length); 731 if (caplen > 1) 732 print_unknown_data(p,"\n\t",caplen); 733 break; 734 } 735} 736 737#define CLNP_PDU_ER 1 738#define CLNP_PDU_DT 28 739#define CLNP_PDU_MD 29 740#define CLNP_PDU_ERQ 30 741#define CLNP_PDU_ERP 31 742 743static struct tok clnp_pdu_values[] = { 744 { CLNP_PDU_ER, "Error Report"}, 745 { CLNP_PDU_MD, "MD"}, 746 { CLNP_PDU_DT, "Data"}, 747 { CLNP_PDU_ERQ, "Echo Request"}, 748 { CLNP_PDU_ERP, "Echo Response"}, 749 { 0, NULL } 750}; 751 752struct clnp_header_t { 753 u_int8_t nlpid; 754 u_int8_t length_indicator; 755 u_int8_t version; 756 u_int8_t lifetime; /* units of 500ms */ 757 u_int8_t type; 758 u_int8_t segment_length[2]; 759 u_int8_t cksum[2]; 760}; 761 762struct clnp_segment_header_t { 763 u_int8_t data_unit_id[2]; 764 u_int8_t segment_offset[2]; 765 u_int8_t total_length[2]; 766}; 767 768/* 769 * clnp_print 770 * Decode CLNP packets. Return 0 on error. 771 */ 772 773static int clnp_print (const u_int8_t *pptr, u_int length) 774{ 775 const u_int8_t *optr,*source_address,*dest_address; 776 u_int li,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags; 777 const struct clnp_header_t *clnp_header; 778 const struct clnp_segment_header_t *clnp_segment_header; 779 u_int8_t rfd_error_major,rfd_error_minor; 780 781 clnp_header = (const struct clnp_header_t *) pptr; 782 TCHECK(*clnp_header); 783 784 li = clnp_header->length_indicator; 785 optr = pptr; 786 787 if (!eflag) 788 printf("CLNP"); 789 790 /* 791 * Sanity checking of the header. 792 */ 793 794 if (clnp_header->version != CLNP_VERSION) { 795 printf("version %d packet not supported", clnp_header->version); 796 return (0); 797 } 798 799 /* FIXME further header sanity checking */ 800 801 clnp_pdu_type = clnp_header->type & CLNP_PDU_TYPE_MASK; 802 clnp_flags = clnp_header->type & CLNP_FLAG_MASK; 803 804 pptr += sizeof(struct clnp_header_t); 805 li -= sizeof(struct clnp_header_t); 806 dest_address_length = *pptr; 807 dest_address = pptr + 1; 808 809 pptr += (1 + dest_address_length); 810 li -= (1 + dest_address_length); 811 source_address_length = *pptr; 812 source_address = pptr +1; 813 814 pptr += (1 + source_address_length); 815 li -= (1 + source_address_length); 816 817 if (vflag < 1) { 818 printf("%s%s > %s, %s, length %u", 819 eflag ? "" : ", ", 820 isonsap_string(source_address, source_address_length), 821 isonsap_string(dest_address, dest_address_length), 822 tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type), 823 length); 824 return (1); 825 } 826 printf("%slength %u",eflag ? "" : ", ",length); 827 828 printf("\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x", 829 tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type), 830 clnp_header->length_indicator, 831 clnp_header->version, 832 clnp_header->lifetime/2, 833 (clnp_header->lifetime%2)*5, 834 EXTRACT_16BITS(clnp_header->segment_length), 835 EXTRACT_16BITS(clnp_header->cksum)); 836 837 osi_print_cksum(optr, EXTRACT_16BITS(clnp_header->cksum), 7, 838 clnp_header->length_indicator); 839 840 printf("\n\tFlags [%s]", 841 bittok2str(clnp_flag_values,"none",clnp_flags)); 842 843 printf("\n\tsource address (length %u): %s\n\tdest address (length %u): %s", 844 source_address_length, 845 isonsap_string(source_address, source_address_length), 846 dest_address_length, 847 isonsap_string(dest_address,dest_address_length)); 848 849 if (clnp_flags & CLNP_SEGMENT_PART) { 850 clnp_segment_header = (const struct clnp_segment_header_t *) pptr; 851 TCHECK(*clnp_segment_header); 852 printf("\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u", 853 EXTRACT_16BITS(clnp_segment_header->data_unit_id), 854 EXTRACT_16BITS(clnp_segment_header->segment_offset), 855 EXTRACT_16BITS(clnp_segment_header->total_length)); 856 pptr+=sizeof(const struct clnp_segment_header_t); 857 li-=sizeof(const struct clnp_segment_header_t); 858 } 859 860 /* now walk the options */ 861 while (li >= 2) { 862 u_int op, opli; 863 const u_int8_t *tptr; 864 865 TCHECK2(*pptr, 2); 866 if (li < 2) { 867 printf(", bad opts/li"); 868 return (0); 869 } 870 op = *pptr++; 871 opli = *pptr++; 872 li -= 2; 873 TCHECK2(*pptr, opli); 874 if (opli > li) { 875 printf(", opt (%d) too long", op); 876 return (0); 877 } 878 li -= opli; 879 tptr = pptr; 880 tlen = opli; 881 882 printf("\n\t %s Option #%u, length %u, value: ", 883 tok2str(clnp_option_values,"Unknown",op), 884 op, 885 opli); 886 887 switch (op) { 888 889 890 case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */ 891 case CLNP_OPTION_SOURCE_ROUTING: 892 printf("%s %s", 893 tok2str(clnp_option_sr_rr_values,"Unknown",*tptr), 894 tok2str(clnp_option_sr_rr_string_values,"Unknown Option %u",op)); 895 nsap_offset=*(tptr+1); 896 if (nsap_offset == 0) { 897 printf(" Bad NSAP offset (0)"); 898 break; 899 } 900 nsap_offset-=1; /* offset to nsap list */ 901 if (nsap_offset > tlen) { 902 printf(" Bad NSAP offset (past end of option)"); 903 break; 904 } 905 tptr+=nsap_offset; 906 tlen-=nsap_offset; 907 while (tlen > 0) { 908 source_address_length=*tptr; 909 if (tlen < source_address_length+1) { 910 printf("\n\t NSAP address goes past end of option"); 911 break; 912 } 913 if (source_address_length > 0) { 914 source_address=(tptr+1); 915 TCHECK2(*source_address, source_address_length); 916 printf("\n\t NSAP address (length %u): %s", 917 source_address_length, 918 isonsap_string(source_address, source_address_length)); 919 } 920 tlen-=source_address_length+1; 921 } 922 break; 923 924 case CLNP_OPTION_PRIORITY: 925 printf("0x%1x", *tptr&0x0f); 926 break; 927 928 case CLNP_OPTION_QOS_MAINTENANCE: 929 printf("\n\t Format Code: %s", 930 tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK)); 931 932 if ((*tptr&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL) 933 printf("\n\t QoS Flags [%s]", 934 bittok2str(clnp_option_qos_global_values, 935 "none", 936 *tptr&CLNP_OPTION_OPTION_QOS_MASK)); 937 break; 938 939 case CLNP_OPTION_SECURITY: 940 printf("\n\t Format Code: %s, Security-Level %u", 941 tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK), 942 *(tptr+1)); 943 break; 944 945 case CLNP_OPTION_DISCARD_REASON: 946 rfd_error_major = (*tptr&0xf0) >> 4; 947 rfd_error_minor = *tptr&0x0f; 948 printf("\n\t Class: %s Error (0x%01x), %s (0x%01x)", 949 tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major), 950 rfd_error_major, 951 tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor), 952 rfd_error_minor); 953 break; 954 955 case CLNP_OPTION_PADDING: 956 printf("padding data"); 957 break; 958 959 /* 960 * FIXME those are the defined Options that lack a decoder 961 * you are welcome to contribute code ;-) 962 */ 963 964 default: 965 print_unknown_data(tptr,"\n\t ",opli); 966 break; 967 } 968 if (vflag > 1) 969 print_unknown_data(pptr,"\n\t ",opli); 970 pptr += opli; 971 } 972 973 switch (clnp_pdu_type) { 974 975 case CLNP_PDU_ER: /* fall through */ 976 case CLNP_PDU_ERP: 977 TCHECK(*pptr); 978 if (*(pptr) == NLPID_CLNP) { 979 printf("\n\t-----original packet-----\n\t"); 980 /* FIXME recursion protection */ 981 clnp_print(pptr, length-clnp_header->length_indicator); 982 break; 983 } 984 985 case CLNP_PDU_DT: 986 case CLNP_PDU_MD: 987 case CLNP_PDU_ERQ: 988 989 default: 990 /* dump the PDU specific data */ 991 if (length-(pptr-optr) > 0) { 992 printf("\n\t undecoded non-header data, length %u",length-clnp_header->length_indicator); 993 print_unknown_data(pptr,"\n\t ",length-(pptr-optr)); 994 } 995 } 996 997 return (1); 998 999 trunc: 1000 fputs("[|clnp]", stdout); 1001 return (1); 1002 1003} 1004 1005 1006#define ESIS_PDU_REDIRECT 6 1007#define ESIS_PDU_ESH 2 1008#define ESIS_PDU_ISH 4 1009 1010static struct tok esis_pdu_values[] = { 1011 { ESIS_PDU_REDIRECT, "redirect"}, 1012 { ESIS_PDU_ESH, "ESH"}, 1013 { ESIS_PDU_ISH, "ISH"}, 1014 { 0, NULL } 1015}; 1016 1017struct esis_header_t { 1018 u_int8_t nlpid; 1019 u_int8_t length_indicator; 1020 u_int8_t version; 1021 u_int8_t reserved; 1022 u_int8_t type; 1023 u_int8_t holdtime[2]; 1024 u_int8_t cksum[2]; 1025}; 1026 1027static void 1028esis_print(const u_int8_t *pptr, u_int length) 1029{ 1030 const u_int8_t *optr; 1031 u_int li,esis_pdu_type,source_address_length, source_address_number; 1032 const struct esis_header_t *esis_header; 1033 1034 if (!eflag) 1035 printf("ES-IS"); 1036 1037 if (length <= 2) { 1038 if (qflag) 1039 printf("bad pkt!"); 1040 else 1041 printf("no header at all!"); 1042 return; 1043 } 1044 1045 esis_header = (const struct esis_header_t *) pptr; 1046 TCHECK(*esis_header); 1047 li = esis_header->length_indicator; 1048 optr = pptr; 1049 1050 /* 1051 * Sanity checking of the header. 1052 */ 1053 1054 if (esis_header->nlpid != NLPID_ESIS) { 1055 printf(" nlpid 0x%02x packet not supported", esis_header->nlpid); 1056 return; 1057 } 1058 1059 if (esis_header->version != ESIS_VERSION) { 1060 printf(" version %d packet not supported", esis_header->version); 1061 return; 1062 } 1063 1064 if (li > length) { 1065 printf(" length indicator(%d) > PDU size (%d)!", li, length); 1066 return; 1067 } 1068 1069 if (li < sizeof(struct esis_header_t) + 2) { 1070 printf(" length indicator < min PDU size %d:", li); 1071 while (--length != 0) 1072 printf("%02X", *pptr++); 1073 return; 1074 } 1075 1076 esis_pdu_type = esis_header->type & ESIS_PDU_TYPE_MASK; 1077 1078 if (vflag < 1) { 1079 printf("%s%s, length %u", 1080 eflag ? "" : ", ", 1081 tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type), 1082 length); 1083 return; 1084 } else 1085 printf("%slength %u\n\t%s (%u)", 1086 eflag ? "" : ", ", 1087 length, 1088 tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type), 1089 esis_pdu_type); 1090 1091 printf(", v: %u%s", esis_header->version, esis_header->version == ESIS_VERSION ? "" : "unsupported" ); 1092 printf(", checksum: 0x%04x", EXTRACT_16BITS(esis_header->cksum)); 1093 1094 osi_print_cksum(pptr, EXTRACT_16BITS(esis_header->cksum), 7, li); 1095 1096 printf(", holding time: %us, length indicator: %u",EXTRACT_16BITS(esis_header->holdtime),li); 1097 1098 if (vflag > 1) 1099 print_unknown_data(optr,"\n\t",sizeof(struct esis_header_t)); 1100 1101 pptr += sizeof(struct esis_header_t); 1102 li -= sizeof(struct esis_header_t); 1103 1104 switch (esis_pdu_type) { 1105 case ESIS_PDU_REDIRECT: { 1106 const u_int8_t *dst, *snpa, *neta; 1107 u_int dstl, snpal, netal; 1108 1109 TCHECK(*pptr); 1110 if (li < 1) { 1111 printf(", bad redirect/li"); 1112 return; 1113 } 1114 dstl = *pptr; 1115 pptr++; 1116 li--; 1117 TCHECK2(*pptr, dstl); 1118 if (li < dstl) { 1119 printf(", bad redirect/li"); 1120 return; 1121 } 1122 dst = pptr; 1123 pptr += dstl; 1124 li -= dstl; 1125 printf("\n\t %s", isonsap_string(dst,dstl)); 1126 1127 TCHECK(*pptr); 1128 if (li < 1) { 1129 printf(", bad redirect/li"); 1130 return; 1131 } 1132 snpal = *pptr; 1133 pptr++; 1134 li--; 1135 TCHECK2(*pptr, snpal); 1136 if (li < snpal) { 1137 printf(", bad redirect/li"); 1138 return; 1139 } 1140 snpa = pptr; 1141 pptr += snpal; 1142 li -= snpal; 1143 TCHECK(*pptr); 1144 if (li < 1) { 1145 printf(", bad redirect/li"); 1146 return; 1147 } 1148 netal = *pptr; 1149 pptr++; 1150 TCHECK2(*pptr, netal); 1151 if (li < netal) { 1152 printf(", bad redirect/li"); 1153 return; 1154 } 1155 neta = pptr; 1156 pptr += netal; 1157 li -= netal; 1158 1159 if (netal == 0) 1160 printf("\n\t %s", etheraddr_string(snpa)); 1161 else 1162 printf("\n\t %s", isonsap_string(neta,netal)); 1163 break; 1164 } 1165 1166 case ESIS_PDU_ESH: 1167 TCHECK(*pptr); 1168 if (li < 1) { 1169 printf(", bad esh/li"); 1170 return; 1171 } 1172 source_address_number = *pptr; 1173 pptr++; 1174 li--; 1175 1176 printf("\n\t Number of Source Addresses: %u", source_address_number); 1177 1178 while (source_address_number > 0) { 1179 TCHECK(*pptr); 1180 if (li < 1) { 1181 printf(", bad esh/li"); 1182 return; 1183 } 1184 source_address_length = *pptr; 1185 pptr++; 1186 li--; 1187 1188 TCHECK2(*pptr, source_address_length); 1189 if (li < source_address_length) { 1190 printf(", bad esh/li"); 1191 return; 1192 } 1193 printf("\n\t NET (length: %u): %s", 1194 source_address_length, 1195 isonsap_string(pptr,source_address_length)); 1196 pptr += source_address_length; 1197 li -= source_address_length; 1198 source_address_number--; 1199 } 1200 1201 break; 1202 1203 case ESIS_PDU_ISH: { 1204 TCHECK(*pptr); 1205 if (li < 1) { 1206 printf(", bad ish/li"); 1207 return; 1208 } 1209 source_address_length = *pptr; 1210 pptr++; 1211 li--; 1212 TCHECK2(*pptr, source_address_length); 1213 if (li < source_address_length) { 1214 printf(", bad ish/li"); 1215 return; 1216 } 1217 printf("\n\t NET (length: %u): %s", source_address_length, isonsap_string(pptr, source_address_length)); 1218 pptr += source_address_length; 1219 li -= source_address_length; 1220 break; 1221 } 1222 1223 default: 1224 if (vflag <= 1) { 1225 if (pptr < snapend) 1226 print_unknown_data(pptr,"\n\t ",snapend-pptr); 1227 } 1228 return; 1229 } 1230 1231 /* now walk the options */ 1232 while (li != 0) { 1233 u_int op, opli; 1234 const u_int8_t *tptr; 1235 1236 if (li < 2) { 1237 printf(", bad opts/li"); 1238 return; 1239 } 1240 TCHECK2(*pptr, 2); 1241 op = *pptr++; 1242 opli = *pptr++; 1243 li -= 2; 1244 if (opli > li) { 1245 printf(", opt (%d) too long", op); 1246 return; 1247 } 1248 li -= opli; 1249 tptr = pptr; 1250 1251 printf("\n\t %s Option #%u, length %u, value: ", 1252 tok2str(esis_option_values,"Unknown",op), 1253 op, 1254 opli); 1255 1256 switch (op) { 1257 1258 case ESIS_OPTION_ES_CONF_TIME: 1259 if (opli == 2) { 1260 TCHECK2(*pptr, 2); 1261 printf("%us", EXTRACT_16BITS(tptr)); 1262 } else 1263 printf("(bad length)"); 1264 break; 1265 1266 case ESIS_OPTION_PROTOCOLS: 1267 while (opli>0) { 1268 TCHECK(*pptr); 1269 printf("%s (0x%02x)", 1270 tok2str(nlpid_values, 1271 "unknown", 1272 *tptr), 1273 *tptr); 1274 if (opli>1) /* further NPLIDs ? - put comma */ 1275 printf(", "); 1276 tptr++; 1277 opli--; 1278 } 1279 break; 1280 1281 /* 1282 * FIXME those are the defined Options that lack a decoder 1283 * you are welcome to contribute code ;-) 1284 */ 1285 1286 case ESIS_OPTION_QOS_MAINTENANCE: 1287 case ESIS_OPTION_SECURITY: 1288 case ESIS_OPTION_PRIORITY: 1289 case ESIS_OPTION_ADDRESS_MASK: 1290 case ESIS_OPTION_SNPA_MASK: 1291 1292 default: 1293 print_unknown_data(tptr,"\n\t ",opli); 1294 break; 1295 } 1296 if (vflag > 1) 1297 print_unknown_data(pptr,"\n\t ",opli); 1298 pptr += opli; 1299 } 1300trunc: 1301 return; 1302} 1303 1304 1305static void 1306isis_print_mcid (const struct isis_spb_mcid *mcid) 1307{ 1308 int i; 1309 1310 printf( "ID: %d, Name: ", mcid->format_id); 1311 1312 for(i=0; i<32; i++) 1313 { 1314 printf("%c", mcid->name[i]); 1315 if(mcid->name[i] == '\0') 1316 break; 1317 } 1318 1319 printf("\n\t Lvl: %d", 1320 EXTRACT_16BITS(mcid->revision_lvl)); 1321 1322 printf( ", Digest: "); 1323 1324 for(i=0;i<16;i++) 1325 printf("%.2x ",mcid->digest[i]); 1326} 1327 1328static int 1329isis_print_mt_port_cap_subtlv (const u_int8_t *tptr, int len) 1330{ 1331 int stlv_type, stlv_len; 1332 const struct isis_subtlv_spb_mcid *subtlv_spb_mcid; 1333 int i; 1334 1335 while (len > 0) 1336 { 1337 stlv_type = *(tptr++); 1338 stlv_len = *(tptr++); 1339 1340 /* first lets see if we know the subTLVs name*/ 1341 printf("\n\t %s subTLV #%u, length: %u", 1342 tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type), 1343 stlv_type, 1344 stlv_len); 1345 1346 /*len -= TLV_TYPE_LEN_OFFSET;*/ 1347 len = len -2; 1348 1349 switch (stlv_type) 1350 { 1351 case ISIS_SUBTLV_SPB_MCID: 1352 { 1353 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_MCID_MIN_LEN)) 1354 goto trunctlv; 1355 1356 subtlv_spb_mcid = (struct isis_subtlv_spb_mcid *)tptr; 1357 1358 printf( "\n\t MCID: "); 1359 isis_print_mcid (&(subtlv_spb_mcid->mcid)); 1360 1361 /*tptr += SPB_MCID_MIN_LEN; 1362 len -= SPB_MCID_MIN_LEN; */ 1363 1364 printf( "\n\t AUX-MCID: "); 1365 isis_print_mcid (&(subtlv_spb_mcid->aux_mcid)); 1366 1367 /*tptr += SPB_MCID_MIN_LEN; 1368 len -= SPB_MCID_MIN_LEN; */ 1369 tptr = tptr + sizeof(struct isis_subtlv_spb_mcid); 1370 len = len - sizeof(struct isis_subtlv_spb_mcid); 1371 1372 break; 1373 } 1374 1375 case ISIS_SUBTLV_SPB_DIGEST: 1376 { 1377 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_DIGEST_MIN_LEN)) 1378 goto trunctlv; 1379 1380 printf ("\n\t RES: %d V: %d A: %d D: %d", 1381 (*(tptr) >> 5), (((*tptr)>> 4) & 0x01), 1382 ((*(tptr) >> 2) & 0x03), ((*tptr) & 0x03)); 1383 1384 tptr++; 1385 1386 printf( "\n\t Digest: "); 1387 1388 for(i=1;i<=8; i++) 1389 { 1390 printf("%08x ", EXTRACT_32BITS(tptr)); 1391 if (i%4 == 0 && i != 8) 1392 printf("\n\t "); 1393 tptr = tptr + 4; 1394 } 1395 1396 len = len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN; 1397 1398 break; 1399 } 1400 1401 case ISIS_SUBTLV_SPB_BVID: 1402 { 1403 if (!TTEST2(*(tptr), stlv_len)) 1404 goto trunctlv; 1405 1406 while (len) 1407 { 1408 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_BVID_MIN_LEN)) 1409 goto trunctlv; 1410 1411 printf("\n\t ECT: %08x", 1412 EXTRACT_32BITS(tptr)); 1413 1414 tptr = tptr+4; 1415 1416 printf(" BVID: %d, U:%01x M:%01x ", 1417 (EXTRACT_16BITS (tptr) >> 4) , 1418 (EXTRACT_16BITS (tptr) >> 3) & 0x01, 1419 (EXTRACT_16BITS (tptr) >> 2) & 0x01); 1420 1421 tptr = tptr + 2; 1422 len = len - ISIS_SUBTLV_SPB_BVID_MIN_LEN; 1423 } 1424 1425 break; 1426 } 1427 1428 default: 1429 break; 1430 } 1431 } 1432 1433 return 0; 1434 1435 trunctlv: 1436 printf("\n\t\t packet exceeded snapshot"); 1437 return(1); 1438} 1439 1440static int 1441isis_print_mt_capability_subtlv (const u_int8_t *tptr, int len) 1442{ 1443 int stlv_type, stlv_len, tmp; 1444 1445 while (len > 0) 1446 { 1447 stlv_type = *(tptr++); 1448 stlv_len = *(tptr++); 1449 1450 /* first lets see if we know the subTLVs name*/ 1451 printf("\n\t %s subTLV #%u, length: %u", 1452 tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type), 1453 stlv_type, 1454 stlv_len); 1455 1456 len = len - 2; 1457 1458 switch (stlv_type) 1459 { 1460 case ISIS_SUBTLV_SPB_INSTANCE: 1461 1462 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN)) 1463 goto trunctlv; 1464 1465 printf("\n\t CIST Root-ID: %08x", EXTRACT_32BITS(tptr)); 1466 tptr = tptr+4; 1467 printf(" %08x", EXTRACT_32BITS(tptr)); 1468 tptr = tptr+4; 1469 printf(", Path Cost: %08x", EXTRACT_32BITS(tptr)); 1470 tptr = tptr+4; 1471 printf(", Prio: %d", EXTRACT_16BITS(tptr)); 1472 tptr = tptr + 2; 1473 printf("\n\t RES: %d", 1474 EXTRACT_16BITS(tptr) >> 5); 1475 printf(", V: %d", 1476 (EXTRACT_16BITS(tptr) >> 4) & 0x0001); 1477 printf(", SPSource-ID: %d", 1478 (EXTRACT_32BITS(tptr) & 0x000fffff)); 1479 tptr = tptr+4; 1480 printf(", No of Trees: %x", *(tptr)); 1481 1482 tmp = *(tptr++); 1483 1484 len = len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN; 1485 1486 while (tmp) 1487 { 1488 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN)) 1489 goto trunctlv; 1490 1491 printf ("\n\t U:%d, M:%d, A:%d, RES:%d", 1492 *(tptr) >> 7, (*(tptr) >> 6) & 0x01, 1493 (*(tptr) >> 5) & 0x01, (*(tptr) & 0x1f)); 1494 1495 tptr++; 1496 1497 printf (", ECT: %08x", EXTRACT_32BITS(tptr)); 1498 1499 tptr = tptr + 4; 1500 1501 printf (", BVID: %d, SPVID: %d", 1502 (EXTRACT_24BITS(tptr) >> 12) & 0x000fff, 1503 EXTRACT_24BITS(tptr) & 0x000fff); 1504 1505 tptr = tptr + 3; 1506 len = len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN; 1507 tmp--; 1508 } 1509 1510 break; 1511 1512 case ISIS_SUBTLV_SPBM_SI: 1513 1514 if (!TTEST2(*(tptr), 6)) 1515 goto trunctlv; 1516 1517 printf("\n\t BMAC: %08x", EXTRACT_32BITS(tptr)); 1518 tptr = tptr+4; 1519 printf("%04x", EXTRACT_16BITS(tptr)); 1520 tptr = tptr+2; 1521 1522 printf (", RES: %d, VID: %d", EXTRACT_16BITS(tptr) >> 12, 1523 (EXTRACT_16BITS(tptr)) & 0x0fff); 1524 1525 tptr = tptr+2; 1526 len = len - 8; 1527 stlv_len = stlv_len - 8; 1528 1529 while (stlv_len) 1530 { 1531 printf("\n\t T: %d, R: %d, RES: %d, ISID: %d", 1532 (EXTRACT_32BITS(tptr) >> 31), 1533 (EXTRACT_32BITS(tptr) >> 30) & 0x01, 1534 (EXTRACT_32BITS(tptr) >> 24) & 0x03f, 1535 (EXTRACT_32BITS(tptr)) & 0x0ffffff); 1536 1537 tptr = tptr + 4; 1538 len = len - 4; 1539 stlv_len = stlv_len - 4; 1540 } 1541 1542 break; 1543 1544 default: 1545 break; 1546 } 1547 } 1548 return 0; 1549 1550 trunctlv: 1551 printf("\n\t\t packet exceeded snapshot"); 1552 return(1); 1553} 1554 1555 1556/* shared routine for printing system, node and lsp-ids */ 1557static char * 1558isis_print_id(const u_int8_t *cp, int id_len) 1559{ 1560 int i; 1561 static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")]; 1562 char *pos = id; 1563 1564 for (i = 1; i <= SYSTEM_ID_LEN; i++) { 1565 snprintf(pos, sizeof(id) - (pos - id), "%02x", *cp++); 1566 pos += strlen(pos); 1567 if (i == 2 || i == 4) 1568 *pos++ = '.'; 1569 } 1570 if (id_len >= NODE_ID_LEN) { 1571 snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++); 1572 pos += strlen(pos); 1573 } 1574 if (id_len == LSP_ID_LEN) 1575 snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp); 1576 return (id); 1577} 1578 1579/* print the 4-byte metric block which is common found in the old-style TLVs */ 1580static int 1581isis_print_metric_block (const struct isis_metric_block *isis_metric_block) 1582{ 1583 printf(", Default Metric: %d, %s", 1584 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default), 1585 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal"); 1586 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay)) 1587 printf("\n\t\t Delay Metric: %d, %s", 1588 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay), 1589 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal"); 1590 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense)) 1591 printf("\n\t\t Expense Metric: %d, %s", 1592 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense), 1593 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal"); 1594 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error)) 1595 printf("\n\t\t Error Metric: %d, %s", 1596 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error), 1597 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal"); 1598 1599 return(1); /* everything is ok */ 1600} 1601 1602static int 1603isis_print_tlv_ip_reach (const u_int8_t *cp, const char *ident, int length) 1604{ 1605 int prefix_len; 1606 const struct isis_tlv_ip_reach *tlv_ip_reach; 1607 1608 tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp; 1609 1610 while (length > 0) { 1611 if ((size_t)length < sizeof(*tlv_ip_reach)) { 1612 printf("short IPv4 Reachability (%d vs %lu)", 1613 length, 1614 (unsigned long)sizeof(*tlv_ip_reach)); 1615 return (0); 1616 } 1617 1618 if (!TTEST(*tlv_ip_reach)) 1619 return (0); 1620 1621 prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask)); 1622 1623 if (prefix_len == -1) 1624 printf("%sIPv4 prefix: %s mask %s", 1625 ident, 1626 ipaddr_string((tlv_ip_reach->prefix)), 1627 ipaddr_string((tlv_ip_reach->mask))); 1628 else 1629 printf("%sIPv4 prefix: %15s/%u", 1630 ident, 1631 ipaddr_string((tlv_ip_reach->prefix)), 1632 prefix_len); 1633 1634 printf(", Distribution: %s, Metric: %u, %s", 1635 ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up", 1636 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default), 1637 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal"); 1638 1639 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay)) 1640 printf("%s Delay Metric: %u, %s", 1641 ident, 1642 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay), 1643 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal"); 1644 1645 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense)) 1646 printf("%s Expense Metric: %u, %s", 1647 ident, 1648 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense), 1649 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal"); 1650 1651 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error)) 1652 printf("%s Error Metric: %u, %s", 1653 ident, 1654 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error), 1655 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal"); 1656 1657 length -= sizeof(struct isis_tlv_ip_reach); 1658 tlv_ip_reach++; 1659 } 1660 return (1); 1661} 1662 1663/* 1664 * this is the common IP-REACH subTLV decoder it is called 1665 * from various EXTD-IP REACH TLVs (135,235,236,237) 1666 */ 1667 1668static int 1669isis_print_ip_reach_subtlv (const u_int8_t *tptr,int subt,int subl,const char *ident) { 1670 1671 /* first lets see if we know the subTLVs name*/ 1672 printf("%s%s subTLV #%u, length: %u", 1673 ident, 1674 tok2str(isis_ext_ip_reach_subtlv_values, 1675 "unknown", 1676 subt), 1677 subt, 1678 subl); 1679 1680 if (!TTEST2(*tptr,subl)) 1681 goto trunctlv; 1682 1683 switch(subt) { 1684 case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */ 1685 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32: 1686 while (subl >= 4) { 1687 printf(", 0x%08x (=%u)", 1688 EXTRACT_32BITS(tptr), 1689 EXTRACT_32BITS(tptr)); 1690 tptr+=4; 1691 subl-=4; 1692 } 1693 break; 1694 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64: 1695 while (subl >= 8) { 1696 printf(", 0x%08x%08x", 1697 EXTRACT_32BITS(tptr), 1698 EXTRACT_32BITS(tptr+4)); 1699 tptr+=8; 1700 subl-=8; 1701 } 1702 break; 1703 default: 1704 if(!print_unknown_data(tptr,"\n\t\t ", 1705 subl)) 1706 return(0); 1707 break; 1708 } 1709 return(1); 1710 1711trunctlv: 1712 printf("%spacket exceeded snapshot",ident); 1713 return(0); 1714} 1715 1716/* 1717 * this is the common IS-REACH subTLV decoder it is called 1718 * from isis_print_ext_is_reach() 1719 */ 1720 1721static int 1722isis_print_is_reach_subtlv (const u_int8_t *tptr,u_int subt,u_int subl,const char *ident) { 1723 1724 u_int te_class,priority_level,gmpls_switch_cap; 1725 union { /* int to float conversion buffer for several subTLVs */ 1726 float f; 1727 u_int32_t i; 1728 } bw; 1729 1730 /* first lets see if we know the subTLVs name*/ 1731 printf("%s%s subTLV #%u, length: %u", 1732 ident, 1733 tok2str(isis_ext_is_reach_subtlv_values, 1734 "unknown", 1735 subt), 1736 subt, 1737 subl); 1738 1739 if (!TTEST2(*tptr,subl)) 1740 goto trunctlv; 1741 1742 switch(subt) { 1743 case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP: 1744 case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID: 1745 case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID: 1746 if (subl >= 4) { 1747 printf(", 0x%08x", EXTRACT_32BITS(tptr)); 1748 if (subl == 8) /* rfc4205 */ 1749 printf(", 0x%08x", EXTRACT_32BITS(tptr+4)); 1750 } 1751 break; 1752 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR: 1753 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR: 1754 if (subl >= sizeof(struct in_addr)) 1755 printf(", %s", ipaddr_string(tptr)); 1756 break; 1757 case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW : 1758 case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW: 1759 if (subl >= 4) { 1760 bw.i = EXTRACT_32BITS(tptr); 1761 printf(", %.3f Mbps", bw.f*8/1000000 ); 1762 } 1763 break; 1764 case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW : 1765 if (subl >= 32) { 1766 for (te_class = 0; te_class < 8; te_class++) { 1767 bw.i = EXTRACT_32BITS(tptr); 1768 printf("%s TE-Class %u: %.3f Mbps", 1769 ident, 1770 te_class, 1771 bw.f*8/1000000 ); 1772 tptr+=4; 1773 } 1774 } 1775 break; 1776 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */ 1777 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD: 1778 printf("%sBandwidth Constraints Model ID: %s (%u)", 1779 ident, 1780 tok2str(diffserv_te_bc_values, "unknown", *tptr), 1781 *tptr); 1782 tptr++; 1783 /* decode BCs until the subTLV ends */ 1784 for (te_class = 0; te_class < (subl-1)/4; te_class++) { 1785 bw.i = EXTRACT_32BITS(tptr); 1786 printf("%s Bandwidth constraint CT%u: %.3f Mbps", 1787 ident, 1788 te_class, 1789 bw.f*8/1000000 ); 1790 tptr+=4; 1791 } 1792 break; 1793 case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC: 1794 if (subl >= 3) 1795 printf(", %u", EXTRACT_24BITS(tptr)); 1796 break; 1797 case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE: 1798 if (subl == 2) { 1799 printf(", [ %s ] (0x%04x)", 1800 bittok2str(isis_subtlv_link_attribute_values, 1801 "Unknown", 1802 EXTRACT_16BITS(tptr)), 1803 EXTRACT_16BITS(tptr)); 1804 } 1805 break; 1806 case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE: 1807 if (subl >= 2) { 1808 printf(", %s, Priority %u", 1809 bittok2str(gmpls_link_prot_values, "none", *tptr), 1810 *(tptr+1)); 1811 } 1812 break; 1813 case ISIS_SUBTLV_SPB_METRIC: 1814 if (subl >= 6) { 1815 printf (", LM: %u", EXTRACT_24BITS(tptr)); 1816 tptr=tptr+3; 1817 printf (", P: %u", *(tptr)); 1818 printf (", P-ID: %u", EXTRACT_16BITS(++tptr)); 1819 } 1820 break; 1821 case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR: 1822 if (subl >= 36) { 1823 gmpls_switch_cap = *tptr; 1824 printf("%s Interface Switching Capability:%s", 1825 ident, 1826 tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap)); 1827 printf(", LSP Encoding: %s", 1828 tok2str(gmpls_encoding_values, "Unknown", *(tptr+1))); 1829 tptr+=4; 1830 printf("%s Max LSP Bandwidth:",ident); 1831 for (priority_level = 0; priority_level < 8; priority_level++) { 1832 bw.i = EXTRACT_32BITS(tptr); 1833 printf("%s priority level %d: %.3f Mbps", 1834 ident, 1835 priority_level, 1836 bw.f*8/1000000 ); 1837 tptr+=4; 1838 } 1839 subl-=36; 1840 switch (gmpls_switch_cap) { 1841 case GMPLS_PSC1: 1842 case GMPLS_PSC2: 1843 case GMPLS_PSC3: 1844 case GMPLS_PSC4: 1845 bw.i = EXTRACT_32BITS(tptr); 1846 printf("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f*8/1000000); 1847 printf("%s Interface MTU: %u", ident, EXTRACT_16BITS(tptr+4)); 1848 break; 1849 case GMPLS_TSC: 1850 bw.i = EXTRACT_32BITS(tptr); 1851 printf("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f*8/1000000); 1852 printf("%s Indication %s", ident, 1853 tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", *(tptr+4))); 1854 break; 1855 default: 1856 /* there is some optional stuff left to decode but this is as of yet 1857 not specified so just lets hexdump what is left */ 1858 if(subl>0){ 1859 if(!print_unknown_data(tptr,"\n\t\t ", 1860 subl)) 1861 return(0); 1862 } 1863 } 1864 } 1865 break; 1866 default: 1867 if(!print_unknown_data(tptr,"\n\t\t ", 1868 subl)) 1869 return(0); 1870 break; 1871 } 1872 return(1); 1873 1874trunctlv: 1875 printf("%spacket exceeded snapshot",ident); 1876 return(0); 1877} 1878 1879 1880/* 1881 * this is the common IS-REACH decoder it is called 1882 * from various EXTD-IS REACH style TLVs (22,24,222) 1883 */ 1884 1885static int 1886isis_print_ext_is_reach (const u_int8_t *tptr,const char *ident, int tlv_type) { 1887 1888 char ident_buffer[20]; 1889 int subtlv_type,subtlv_len,subtlv_sum_len; 1890 int proc_bytes = 0; /* how many bytes did we process ? */ 1891 1892 if (!TTEST2(*tptr, NODE_ID_LEN)) 1893 return(0); 1894 1895 printf("%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN)); 1896 tptr+=(NODE_ID_LEN); 1897 1898 if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */ 1899 if (!TTEST2(*tptr, 3)) /* and is therefore skipped */ 1900 return(0); 1901 printf(", Metric: %d",EXTRACT_24BITS(tptr)); 1902 tptr+=3; 1903 } 1904 1905 if (!TTEST2(*tptr, 1)) 1906 return(0); 1907 subtlv_sum_len=*(tptr++); /* read out subTLV length */ 1908 proc_bytes=NODE_ID_LEN+3+1; 1909 printf(", %ssub-TLVs present",subtlv_sum_len ? "" : "no "); 1910 if (subtlv_sum_len) { 1911 printf(" (%u)",subtlv_sum_len); 1912 while (subtlv_sum_len>0) { 1913 if (!TTEST2(*tptr,2)) 1914 return(0); 1915 subtlv_type=*(tptr++); 1916 subtlv_len=*(tptr++); 1917 /* prepend the ident string */ 1918 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); 1919 if(!isis_print_is_reach_subtlv(tptr,subtlv_type,subtlv_len,ident_buffer)) 1920 return(0); 1921 tptr+=subtlv_len; 1922 subtlv_sum_len-=(subtlv_len+2); 1923 proc_bytes+=(subtlv_len+2); 1924 } 1925 } 1926 return(proc_bytes); 1927} 1928 1929/* 1930 * this is the common Multi Topology ID decoder 1931 * it is called from various MT-TLVs (222,229,235,237) 1932 */ 1933 1934static int 1935isis_print_mtid (const u_int8_t *tptr,const char *ident) { 1936 1937 if (!TTEST2(*tptr, 2)) 1938 return(0); 1939 1940 printf("%s%s", 1941 ident, 1942 tok2str(isis_mt_values, 1943 "Reserved for IETF Consensus", 1944 ISIS_MASK_MTID(EXTRACT_16BITS(tptr)))); 1945 1946 printf(" Topology (0x%03x), Flags: [%s]", 1947 ISIS_MASK_MTID(EXTRACT_16BITS(tptr)), 1948 bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_16BITS(tptr)))); 1949 1950 return(2); 1951} 1952 1953/* 1954 * this is the common extended IP reach decoder 1955 * it is called from TLVs (135,235,236,237) 1956 * we process the TLV and optional subTLVs and return 1957 * the amount of processed bytes 1958 */ 1959 1960static int 1961isis_print_extd_ip_reach (const u_int8_t *tptr, const char *ident, u_int16_t afi) { 1962 1963 char ident_buffer[20]; 1964#ifdef INET6 1965 u_int8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */ 1966#else 1967 u_int8_t prefix[sizeof(struct in_addr)]; /* shared copy buffer for IPv4 prefixes */ 1968#endif 1969 u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen; 1970 1971 if (!TTEST2(*tptr, 4)) 1972 return (0); 1973 metric = EXTRACT_32BITS(tptr); 1974 processed=4; 1975 tptr+=4; 1976 1977 if (afi == AF_INET) { 1978 if (!TTEST2(*tptr, 1)) /* fetch status byte */ 1979 return (0); 1980 status_byte=*(tptr++); 1981 bit_length = status_byte&0x3f; 1982 if (bit_length > 32) { 1983 printf("%sIPv4 prefix: bad bit length %u", 1984 ident, 1985 bit_length); 1986 return (0); 1987 } 1988 processed++; 1989#ifdef INET6 1990 } else if (afi == AF_INET6) { 1991 if (!TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */ 1992 return (0); 1993 status_byte=*(tptr++); 1994 bit_length=*(tptr++); 1995 if (bit_length > 128) { 1996 printf("%sIPv6 prefix: bad bit length %u", 1997 ident, 1998 bit_length); 1999 return (0); 2000 } 2001 processed+=2; 2002#endif 2003 } else 2004 return (0); /* somebody is fooling us */ 2005 2006 byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */ 2007 2008 if (!TTEST2(*tptr, byte_length)) 2009 return (0); 2010 memset(prefix, 0, sizeof prefix); /* clear the copy buffer */ 2011 memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */ 2012 tptr+=byte_length; 2013 processed+=byte_length; 2014 2015 if (afi == AF_INET) 2016 printf("%sIPv4 prefix: %15s/%u", 2017 ident, 2018 ipaddr_string(prefix), 2019 bit_length); 2020#ifdef INET6 2021 if (afi == AF_INET6) 2022 printf("%sIPv6 prefix: %s/%u", 2023 ident, 2024 ip6addr_string(prefix), 2025 bit_length); 2026#endif 2027 2028 printf(", Distribution: %s, Metric: %u", 2029 ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up", 2030 metric); 2031 2032 if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) 2033 printf(", sub-TLVs present"); 2034#ifdef INET6 2035 if (afi == AF_INET6) 2036 printf(", %s%s", 2037 ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal", 2038 ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : ""); 2039#endif 2040 2041 if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) 2042#ifdef INET6 2043 || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte)) 2044#endif 2045 ) { 2046 /* assume that one prefix can hold more 2047 than one subTLV - therefore the first byte must reflect 2048 the aggregate bytecount of the subTLVs for this prefix 2049 */ 2050 if (!TTEST2(*tptr, 1)) 2051 return (0); 2052 sublen=*(tptr++); 2053 processed+=sublen+1; 2054 printf(" (%u)",sublen); /* print out subTLV length */ 2055 2056 while (sublen>0) { 2057 if (!TTEST2(*tptr,2)) 2058 return (0); 2059 subtlvtype=*(tptr++); 2060 subtlvlen=*(tptr++); 2061 /* prepend the ident string */ 2062 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); 2063 if(!isis_print_ip_reach_subtlv(tptr,subtlvtype,subtlvlen,ident_buffer)) 2064 return(0); 2065 tptr+=subtlvlen; 2066 sublen-=(subtlvlen+2); 2067 } 2068 } 2069 return (processed); 2070} 2071 2072/* 2073 * isis_print 2074 * Decode IS-IS packets. Return 0 on error. 2075 */ 2076 2077static int isis_print (const u_int8_t *p, u_int length) 2078{ 2079 const struct isis_common_header *isis_header; 2080 2081 const struct isis_iih_lan_header *header_iih_lan; 2082 const struct isis_iih_ptp_header *header_iih_ptp; 2083 struct isis_lsp_header *header_lsp; 2084 const struct isis_csnp_header *header_csnp; 2085 const struct isis_psnp_header *header_psnp; 2086 2087 const struct isis_tlv_lsp *tlv_lsp; 2088 const struct isis_tlv_ptp_adj *tlv_ptp_adj; 2089 const struct isis_tlv_is_reach *tlv_is_reach; 2090 const struct isis_tlv_es_reach *tlv_es_reach; 2091 2092 u_int8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len; 2093 u_int8_t ext_is_len, ext_ip_len, mt_len; 2094 const u_int8_t *optr, *pptr, *tptr; 2095 u_short packet_len,pdu_len, key_id; 2096 u_int i,vendor_id; 2097 int sigcheck; 2098 2099 packet_len=length; 2100 optr = p; /* initialize the _o_riginal pointer to the packet start - 2101 need it for parsing the checksum TLV and authentication 2102 TLV verification */ 2103 isis_header = (const struct isis_common_header *)p; 2104 TCHECK(*isis_header); 2105 pptr = p+(ISIS_COMMON_HEADER_SIZE); 2106 header_iih_lan = (const struct isis_iih_lan_header *)pptr; 2107 header_iih_ptp = (const struct isis_iih_ptp_header *)pptr; 2108 header_lsp = (struct isis_lsp_header *)pptr; 2109 header_csnp = (const struct isis_csnp_header *)pptr; 2110 header_psnp = (const struct isis_psnp_header *)pptr; 2111 2112 if (!eflag) 2113 printf("IS-IS"); 2114 2115 /* 2116 * Sanity checking of the header. 2117 */ 2118 2119 if (isis_header->version != ISIS_VERSION) { 2120 printf("version %d packet not supported", isis_header->version); 2121 return (0); 2122 } 2123 2124 if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) { 2125 printf("system ID length of %d is not supported", 2126 isis_header->id_length); 2127 return (0); 2128 } 2129 2130 if (isis_header->pdu_version != ISIS_VERSION) { 2131 printf("version %d packet not supported", isis_header->pdu_version); 2132 return (0); 2133 } 2134 2135 max_area = isis_header->max_area; 2136 switch(max_area) { 2137 case 0: 2138 max_area = 3; /* silly shit */ 2139 break; 2140 case 255: 2141 printf("bad packet -- 255 areas"); 2142 return (0); 2143 default: 2144 break; 2145 } 2146 2147 id_length = isis_header->id_length; 2148 switch(id_length) { 2149 case 0: 2150 id_length = 6; /* silly shit again */ 2151 break; 2152 case 1: /* 1-8 are valid sys-ID lenghts */ 2153 case 2: 2154 case 3: 2155 case 4: 2156 case 5: 2157 case 6: 2158 case 7: 2159 case 8: 2160 break; 2161 case 255: 2162 id_length = 0; /* entirely useless */ 2163 break; 2164 default: 2165 break; 2166 } 2167 2168 /* toss any non 6-byte sys-ID len PDUs */ 2169 if (id_length != 6 ) { 2170 printf("bad packet -- illegal sys-ID length (%u)", id_length); 2171 return (0); 2172 } 2173 2174 pdu_type=isis_header->pdu_type; 2175 2176 /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/ 2177 if (vflag < 1) { 2178 printf("%s%s", 2179 eflag ? "" : ", ", 2180 tok2str(isis_pdu_values,"unknown PDU-Type %u",pdu_type)); 2181 2182 switch (pdu_type) { 2183 2184 case ISIS_PDU_L1_LAN_IIH: 2185 case ISIS_PDU_L2_LAN_IIH: 2186 printf(", src-id %s", 2187 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN)); 2188 printf(", lan-id %s, prio %u", 2189 isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN), 2190 header_iih_lan->priority); 2191 break; 2192 case ISIS_PDU_PTP_IIH: 2193 printf(", src-id %s", isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN)); 2194 break; 2195 case ISIS_PDU_L1_LSP: 2196 case ISIS_PDU_L2_LSP: 2197 printf(", lsp-id %s, seq 0x%08x, lifetime %5us", 2198 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), 2199 EXTRACT_32BITS(header_lsp->sequence_number), 2200 EXTRACT_16BITS(header_lsp->remaining_lifetime)); 2201 break; 2202 case ISIS_PDU_L1_CSNP: 2203 case ISIS_PDU_L2_CSNP: 2204 printf(", src-id %s", isis_print_id(header_csnp->source_id,NODE_ID_LEN)); 2205 break; 2206 case ISIS_PDU_L1_PSNP: 2207 case ISIS_PDU_L2_PSNP: 2208 printf(", src-id %s", isis_print_id(header_psnp->source_id,NODE_ID_LEN)); 2209 break; 2210 2211 } 2212 printf(", length %u", length); 2213 2214 return(1); 2215 } 2216 2217 /* ok they seem to want to know everything - lets fully decode it */ 2218 printf("%slength %u", eflag ? "" : ", ",length); 2219 2220 printf("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)", 2221 tok2str(isis_pdu_values, 2222 "unknown, type %u", 2223 pdu_type), 2224 isis_header->fixed_len, 2225 isis_header->version, 2226 isis_header->pdu_version, 2227 id_length, 2228 isis_header->id_length, 2229 max_area, 2230 isis_header->max_area); 2231 2232 if (vflag > 1) { 2233 if(!print_unknown_data(optr,"\n\t",8)) /* provide the _o_riginal pointer */ 2234 return(0); /* for optionally debugging the common header */ 2235 } 2236 2237 switch (pdu_type) { 2238 2239 case ISIS_PDU_L1_LAN_IIH: 2240 case ISIS_PDU_L2_LAN_IIH: 2241 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) { 2242 printf(", bogus fixed header length %u should be %lu", 2243 isis_header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE); 2244 return (0); 2245 } 2246 2247 pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len); 2248 if (packet_len>pdu_len) { 2249 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2250 length=pdu_len; 2251 } 2252 2253 TCHECK(*header_iih_lan); 2254 printf("\n\t source-id: %s, holding time: %us, Flags: [%s]", 2255 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN), 2256 EXTRACT_16BITS(header_iih_lan->holding_time), 2257 tok2str(isis_iih_circuit_type_values, 2258 "unknown circuit type 0x%02x", 2259 header_iih_lan->circuit_type)); 2260 2261 printf("\n\t lan-id: %s, Priority: %u, PDU length: %u", 2262 isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN), 2263 (header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK, 2264 pdu_len); 2265 2266 if (vflag > 1) { 2267 if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_LAN_HEADER_SIZE)) 2268 return(0); 2269 } 2270 2271 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); 2272 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); 2273 break; 2274 2275 case ISIS_PDU_PTP_IIH: 2276 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) { 2277 printf(", bogus fixed header length %u should be %lu", 2278 isis_header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE); 2279 return (0); 2280 } 2281 2282 pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len); 2283 if (packet_len>pdu_len) { 2284 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2285 length=pdu_len; 2286 } 2287 2288 TCHECK(*header_iih_ptp); 2289 printf("\n\t source-id: %s, holding time: %us, Flags: [%s]", 2290 isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN), 2291 EXTRACT_16BITS(header_iih_ptp->holding_time), 2292 tok2str(isis_iih_circuit_type_values, 2293 "unknown circuit type 0x%02x", 2294 header_iih_ptp->circuit_type)); 2295 2296 printf("\n\t circuit-id: 0x%02x, PDU length: %u", 2297 header_iih_ptp->circuit_id, 2298 pdu_len); 2299 2300 if (vflag > 1) { 2301 if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_PTP_HEADER_SIZE)) 2302 return(0); 2303 } 2304 2305 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); 2306 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); 2307 break; 2308 2309 case ISIS_PDU_L1_LSP: 2310 case ISIS_PDU_L2_LSP: 2311 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) { 2312 printf(", bogus fixed header length %u should be %lu", 2313 isis_header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE); 2314 return (0); 2315 } 2316 2317 pdu_len=EXTRACT_16BITS(header_lsp->pdu_len); 2318 if (packet_len>pdu_len) { 2319 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2320 length=pdu_len; 2321 } 2322 2323 TCHECK(*header_lsp); 2324 printf("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x", 2325 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), 2326 EXTRACT_32BITS(header_lsp->sequence_number), 2327 EXTRACT_16BITS(header_lsp->remaining_lifetime), 2328 EXTRACT_16BITS(header_lsp->checksum)); 2329 2330 2331 osi_print_cksum((u_int8_t *)header_lsp->lsp_id, 2332 EXTRACT_16BITS(header_lsp->checksum), 12, length-12); 2333 2334 /* 2335 * Clear checksum and lifetime prior to signature verification. 2336 */ 2337 header_lsp->checksum[0] = 0; 2338 header_lsp->checksum[1] = 0; 2339 header_lsp->remaining_lifetime[0] = 0; 2340 header_lsp->remaining_lifetime[1] = 0; 2341 2342 2343 printf(", PDU length: %u, Flags: [ %s", 2344 pdu_len, 2345 ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : ""); 2346 2347 if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) { 2348 printf("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : ""); 2349 printf("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : ""); 2350 printf("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : ""); 2351 printf("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : ""); 2352 printf("ATT bit set, "); 2353 } 2354 printf("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : ""); 2355 printf("%s ]", tok2str(isis_lsp_istype_values,"Unknown(0x%x)",ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock))); 2356 2357 if (vflag > 1) { 2358 if(!print_unknown_data(pptr,"\n\t ",ISIS_LSP_HEADER_SIZE)) 2359 return(0); 2360 } 2361 2362 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); 2363 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); 2364 break; 2365 2366 case ISIS_PDU_L1_CSNP: 2367 case ISIS_PDU_L2_CSNP: 2368 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) { 2369 printf(", bogus fixed header length %u should be %lu", 2370 isis_header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE); 2371 return (0); 2372 } 2373 2374 pdu_len=EXTRACT_16BITS(header_csnp->pdu_len); 2375 if (packet_len>pdu_len) { 2376 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2377 length=pdu_len; 2378 } 2379 2380 TCHECK(*header_csnp); 2381 printf("\n\t source-id: %s, PDU length: %u", 2382 isis_print_id(header_csnp->source_id, NODE_ID_LEN), 2383 pdu_len); 2384 printf("\n\t start lsp-id: %s", 2385 isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN)); 2386 printf("\n\t end lsp-id: %s", 2387 isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN)); 2388 2389 if (vflag > 1) { 2390 if(!print_unknown_data(pptr,"\n\t ",ISIS_CSNP_HEADER_SIZE)) 2391 return(0); 2392 } 2393 2394 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); 2395 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); 2396 break; 2397 2398 case ISIS_PDU_L1_PSNP: 2399 case ISIS_PDU_L2_PSNP: 2400 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) { 2401 printf("- bogus fixed header length %u should be %lu", 2402 isis_header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE); 2403 return (0); 2404 } 2405 2406 pdu_len=EXTRACT_16BITS(header_psnp->pdu_len); 2407 if (packet_len>pdu_len) { 2408 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2409 length=pdu_len; 2410 } 2411 2412 TCHECK(*header_psnp); 2413 printf("\n\t source-id: %s, PDU length: %u", 2414 isis_print_id(header_psnp->source_id, NODE_ID_LEN), 2415 pdu_len); 2416 2417 if (vflag > 1) { 2418 if(!print_unknown_data(pptr,"\n\t ",ISIS_PSNP_HEADER_SIZE)) 2419 return(0); 2420 } 2421 2422 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); 2423 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); 2424 break; 2425 2426 default: 2427 if(!print_unknown_data(pptr,"\n\t ",length)) 2428 return(0); 2429 return (0); 2430 } 2431 2432 /* 2433 * Now print the TLV's. 2434 */ 2435 2436 while (packet_len >= 2) { 2437 if (pptr == snapend) { 2438 return (1); 2439 } 2440 2441 if (!TTEST2(*pptr, 2)) { 2442 printf("\n\t\t packet exceeded snapshot (%ld) bytes", 2443 (long)(pptr-snapend)); 2444 return (1); 2445 } 2446 tlv_type = *pptr++; 2447 tlv_len = *pptr++; 2448 tmp =tlv_len; /* copy temporary len & pointer to packet data */ 2449 tptr = pptr; 2450 packet_len -= 2; 2451 if (tlv_len > packet_len) { 2452 break; 2453 } 2454 2455 /* first lets see if we know the TLVs name*/ 2456 printf("\n\t %s TLV #%u, length: %u", 2457 tok2str(isis_tlv_values, 2458 "unknown", 2459 tlv_type), 2460 tlv_type, 2461 tlv_len); 2462 2463 if (tlv_len == 0) /* something is malformed */ 2464 continue; 2465 2466 /* now check if we have a decoder otherwise do a hexdump at the end*/ 2467 switch (tlv_type) { 2468 case ISIS_TLV_AREA_ADDR: 2469 if (!TTEST2(*tptr, 1)) 2470 goto trunctlv; 2471 alen = *tptr++; 2472 while (tmp && alen < tmp) { 2473 printf("\n\t Area address (length: %u): %s", 2474 alen, 2475 isonsap_string(tptr,alen)); 2476 tptr += alen; 2477 tmp -= alen + 1; 2478 if (tmp==0) /* if this is the last area address do not attemt a boundary check */ 2479 break; 2480 if (!TTEST2(*tptr, 1)) 2481 goto trunctlv; 2482 alen = *tptr++; 2483 } 2484 break; 2485 case ISIS_TLV_ISNEIGH: 2486 while (tmp >= ETHER_ADDR_LEN) { 2487 if (!TTEST2(*tptr, ETHER_ADDR_LEN)) 2488 goto trunctlv; 2489 printf("\n\t SNPA: %s",isis_print_id(tptr,ETHER_ADDR_LEN)); 2490 tmp -= ETHER_ADDR_LEN; 2491 tptr += ETHER_ADDR_LEN; 2492 } 2493 break; 2494 2495 case ISIS_TLV_ISNEIGH_VARLEN: 2496 if (!TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */ 2497 goto trunctlv; 2498 lan_alen = *tptr++; /* LAN address length */ 2499 if (lan_alen == 0) { 2500 printf("\n\t LAN address length 0 bytes (invalid)"); 2501 break; 2502 } 2503 tmp --; 2504 printf("\n\t LAN address length %u bytes ",lan_alen); 2505 while (tmp >= lan_alen) { 2506 if (!TTEST2(*tptr, lan_alen)) 2507 goto trunctlv; 2508 printf("\n\t\tIS Neighbor: %s",isis_print_id(tptr,lan_alen)); 2509 tmp -= lan_alen; 2510 tptr +=lan_alen; 2511 } 2512 break; 2513 2514 case ISIS_TLV_PADDING: 2515 break; 2516 2517 case ISIS_TLV_MT_IS_REACH: 2518 mt_len = isis_print_mtid(tptr, "\n\t "); 2519 if (mt_len == 0) /* did something go wrong ? */ 2520 goto trunctlv; 2521 tptr+=mt_len; 2522 tmp-=mt_len; 2523 while (tmp >= 2+NODE_ID_LEN+3+1) { 2524 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); 2525 if (ext_is_len == 0) /* did something go wrong ? */ 2526 goto trunctlv; 2527 2528 tmp-=ext_is_len; 2529 tptr+=ext_is_len; 2530 } 2531 break; 2532 2533 case ISIS_TLV_IS_ALIAS_ID: 2534 while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */ 2535 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); 2536 if (ext_is_len == 0) /* did something go wrong ? */ 2537 goto trunctlv; 2538 tmp-=ext_is_len; 2539 tptr+=ext_is_len; 2540 } 2541 break; 2542 2543 case ISIS_TLV_EXT_IS_REACH: 2544 while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */ 2545 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); 2546 if (ext_is_len == 0) /* did something go wrong ? */ 2547 goto trunctlv; 2548 tmp-=ext_is_len; 2549 tptr+=ext_is_len; 2550 } 2551 break; 2552 case ISIS_TLV_IS_REACH: 2553 if (!TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */ 2554 goto trunctlv; 2555 printf("\n\t %s", 2556 tok2str(isis_is_reach_virtual_values, 2557 "bogus virtual flag 0x%02x", 2558 *tptr++)); 2559 tlv_is_reach = (const struct isis_tlv_is_reach *)tptr; 2560 while (tmp >= sizeof(struct isis_tlv_is_reach)) { 2561 if (!TTEST(*tlv_is_reach)) 2562 goto trunctlv; 2563 printf("\n\t IS Neighbor: %s", 2564 isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN)); 2565 isis_print_metric_block(&tlv_is_reach->isis_metric_block); 2566 tmp -= sizeof(struct isis_tlv_is_reach); 2567 tlv_is_reach++; 2568 } 2569 break; 2570 2571 case ISIS_TLV_ESNEIGH: 2572 tlv_es_reach = (const struct isis_tlv_es_reach *)tptr; 2573 while (tmp >= sizeof(struct isis_tlv_es_reach)) { 2574 if (!TTEST(*tlv_es_reach)) 2575 goto trunctlv; 2576 printf("\n\t ES Neighbor: %s", 2577 isis_print_id(tlv_es_reach->neighbor_sysid,SYSTEM_ID_LEN)); 2578 isis_print_metric_block(&tlv_es_reach->isis_metric_block); 2579 tmp -= sizeof(struct isis_tlv_es_reach); 2580 tlv_es_reach++; 2581 } 2582 break; 2583 2584 /* those two TLVs share the same format */ 2585 case ISIS_TLV_INT_IP_REACH: 2586 case ISIS_TLV_EXT_IP_REACH: 2587 if (!isis_print_tlv_ip_reach(pptr, "\n\t ", tlv_len)) 2588 return (1); 2589 break; 2590 2591 case ISIS_TLV_EXTD_IP_REACH: 2592 while (tmp>0) { 2593 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET); 2594 if (ext_ip_len == 0) /* did something go wrong ? */ 2595 goto trunctlv; 2596 tptr+=ext_ip_len; 2597 tmp-=ext_ip_len; 2598 } 2599 break; 2600 2601 case ISIS_TLV_MT_IP_REACH: 2602 mt_len = isis_print_mtid(tptr, "\n\t "); 2603 if (mt_len == 0) { /* did something go wrong ? */ 2604 goto trunctlv; 2605 } 2606 tptr+=mt_len; 2607 tmp-=mt_len; 2608 2609 while (tmp>0) { 2610 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET); 2611 if (ext_ip_len == 0) /* did something go wrong ? */ 2612 goto trunctlv; 2613 tptr+=ext_ip_len; 2614 tmp-=ext_ip_len; 2615 } 2616 break; 2617 2618#ifdef INET6 2619 case ISIS_TLV_IP6_REACH: 2620 while (tmp>0) { 2621 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET6); 2622 if (ext_ip_len == 0) /* did something go wrong ? */ 2623 goto trunctlv; 2624 tptr+=ext_ip_len; 2625 tmp-=ext_ip_len; 2626 } 2627 break; 2628 2629 case ISIS_TLV_MT_IP6_REACH: 2630 mt_len = isis_print_mtid(tptr, "\n\t "); 2631 if (mt_len == 0) { /* did something go wrong ? */ 2632 goto trunctlv; 2633 } 2634 tptr+=mt_len; 2635 tmp-=mt_len; 2636 2637 while (tmp>0) { 2638 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET6); 2639 if (ext_ip_len == 0) /* did something go wrong ? */ 2640 goto trunctlv; 2641 tptr+=ext_ip_len; 2642 tmp-=ext_ip_len; 2643 } 2644 break; 2645 2646 case ISIS_TLV_IP6ADDR: 2647 while (tmp>=sizeof(struct in6_addr)) { 2648 if (!TTEST2(*tptr, sizeof(struct in6_addr))) 2649 goto trunctlv; 2650 2651 printf("\n\t IPv6 interface address: %s", 2652 ip6addr_string(tptr)); 2653 2654 tptr += sizeof(struct in6_addr); 2655 tmp -= sizeof(struct in6_addr); 2656 } 2657 break; 2658#endif 2659 case ISIS_TLV_AUTH: 2660 if (!TTEST2(*tptr, 1)) 2661 goto trunctlv; 2662 2663 printf("\n\t %s: ", 2664 tok2str(isis_subtlv_auth_values, 2665 "unknown Authentication type 0x%02x", 2666 *tptr)); 2667 2668 switch (*tptr) { 2669 case ISIS_SUBTLV_AUTH_SIMPLE: 2670 for(i=1;i<tlv_len;i++) { 2671 if (!TTEST2(*(tptr+i), 1)) 2672 goto trunctlv; 2673 printf("%c",*(tptr+i)); 2674 } 2675 break; 2676 case ISIS_SUBTLV_AUTH_MD5: 2677 for(i=1;i<tlv_len;i++) { 2678 if (!TTEST2(*(tptr+i), 1)) 2679 goto trunctlv; 2680 printf("%02x",*(tptr+i)); 2681 } 2682 if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1) 2683 printf(", (malformed subTLV) "); 2684 2685#ifdef HAVE_LIBCRYPTO 2686 sigcheck = signature_verify(optr, length, 2687 (unsigned char *)tptr + 1); 2688#else 2689 sigcheck = CANT_CHECK_SIGNATURE; 2690#endif 2691 printf(" (%s)", tok2str(signature_check_values, "Unknown", sigcheck)); 2692 2693 break; 2694 case ISIS_SUBTLV_AUTH_GENERIC: 2695 key_id = EXTRACT_16BITS((tptr+1)); 2696 printf("%u, password: ", key_id); 2697 for(i=1 + sizeof(u_int16_t);i<tlv_len;i++) { 2698 if (!TTEST2(*(tptr+i), 1)) 2699 goto trunctlv; 2700 printf("%02x",*(tptr+i)); 2701 } 2702 break; 2703 case ISIS_SUBTLV_AUTH_PRIVATE: 2704 default: 2705 if(!print_unknown_data(tptr+1,"\n\t\t ",tlv_len-1)) 2706 return(0); 2707 break; 2708 } 2709 break; 2710 2711 case ISIS_TLV_PTP_ADJ: 2712 tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr; 2713 if(tmp>=1) { 2714 if (!TTEST2(*tptr, 1)) 2715 goto trunctlv; 2716 printf("\n\t Adjacency State: %s (%u)", 2717 tok2str(isis_ptp_adjancey_values, "unknown", *tptr), 2718 *tptr); 2719 tmp--; 2720 } 2721 if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) { 2722 if (!TTEST2(tlv_ptp_adj->extd_local_circuit_id, 2723 sizeof(tlv_ptp_adj->extd_local_circuit_id))) 2724 goto trunctlv; 2725 printf("\n\t Extended Local circuit-ID: 0x%08x", 2726 EXTRACT_32BITS(tlv_ptp_adj->extd_local_circuit_id)); 2727 tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id); 2728 } 2729 if(tmp>=SYSTEM_ID_LEN) { 2730 if (!TTEST2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN)) 2731 goto trunctlv; 2732 printf("\n\t Neighbor System-ID: %s", 2733 isis_print_id(tlv_ptp_adj->neighbor_sysid,SYSTEM_ID_LEN)); 2734 tmp-=SYSTEM_ID_LEN; 2735 } 2736 if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) { 2737 if (!TTEST2(tlv_ptp_adj->neighbor_extd_local_circuit_id, 2738 sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id))) 2739 goto trunctlv; 2740 printf("\n\t Neighbor Extended Local circuit-ID: 0x%08x", 2741 EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id)); 2742 } 2743 break; 2744 2745 case ISIS_TLV_PROTOCOLS: 2746 printf("\n\t NLPID(s): "); 2747 while (tmp>0) { 2748 if (!TTEST2(*(tptr), 1)) 2749 goto trunctlv; 2750 printf("%s (0x%02x)", 2751 tok2str(nlpid_values, 2752 "unknown", 2753 *tptr), 2754 *tptr); 2755 if (tmp>1) /* further NPLIDs ? - put comma */ 2756 printf(", "); 2757 tptr++; 2758 tmp--; 2759 } 2760 break; 2761 2762 case ISIS_TLV_MT_PORT_CAP: 2763 { 2764 if (!TTEST2(*(tptr), 2)) 2765 goto trunctlv; 2766 2767 printf("\n\t RES: %d, MTID(s): %d", 2768 (EXTRACT_16BITS (tptr) >> 12), 2769 (EXTRACT_16BITS (tptr) & 0x0fff)); 2770 2771 tmp = tmp-2; 2772 tptr = tptr+2; 2773 2774 if (tmp) 2775 isis_print_mt_port_cap_subtlv (tptr, tmp); 2776 2777 break; 2778 } 2779 2780 case ISIS_TLV_MT_CAPABILITY: 2781 2782 if (!TTEST2(*(tptr), 2)) 2783 goto trunctlv; 2784 2785 printf("\n\t O: %d, RES: %d, MTID(s): %d", 2786 (EXTRACT_16BITS(tptr) >> 15) & 0x01, 2787 (EXTRACT_16BITS(tptr) >> 12) & 0x07, 2788 EXTRACT_16BITS(tptr) & 0x0fff); 2789 2790 tmp = tmp-2; 2791 tptr = tptr+2; 2792 2793 if (tmp) 2794 isis_print_mt_capability_subtlv (tptr, tmp); 2795 2796 break; 2797 2798 case ISIS_TLV_TE_ROUTER_ID: 2799 if (!TTEST2(*pptr, sizeof(struct in_addr))) 2800 goto trunctlv; 2801 printf("\n\t Traffic Engineering Router ID: %s", ipaddr_string(pptr)); 2802 break; 2803 2804 case ISIS_TLV_IPADDR: 2805 while (tmp>=sizeof(struct in_addr)) { 2806 if (!TTEST2(*tptr, sizeof(struct in_addr))) 2807 goto trunctlv; 2808 printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr)); 2809 tptr += sizeof(struct in_addr); 2810 tmp -= sizeof(struct in_addr); 2811 } 2812 break; 2813 2814 case ISIS_TLV_HOSTNAME: 2815 printf("\n\t Hostname: "); 2816 while (tmp>0) { 2817 if (!TTEST2(*tptr, 1)) 2818 goto trunctlv; 2819 printf("%c",*tptr++); 2820 tmp--; 2821 } 2822 break; 2823 2824 case ISIS_TLV_SHARED_RISK_GROUP: 2825 if (tmp < NODE_ID_LEN) 2826 break; 2827 if (!TTEST2(*tptr, NODE_ID_LEN)) 2828 goto trunctlv; 2829 printf("\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN)); 2830 tptr+=(NODE_ID_LEN); 2831 tmp-=(NODE_ID_LEN); 2832 2833 if (tmp < 1) 2834 break; 2835 if (!TTEST2(*tptr, 1)) 2836 goto trunctlv; 2837 printf(", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered"); 2838 tmp--; 2839 2840 if (tmp < sizeof(struct in_addr)) 2841 break; 2842 if (!TTEST2(*tptr,sizeof(struct in_addr))) 2843 goto trunctlv; 2844 printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr)); 2845 tptr+=sizeof(struct in_addr); 2846 tmp-=sizeof(struct in_addr); 2847 2848 if (tmp < sizeof(struct in_addr)) 2849 break; 2850 if (!TTEST2(*tptr,sizeof(struct in_addr))) 2851 goto trunctlv; 2852 printf("\n\t IPv4 neighbor address: %s", ipaddr_string(tptr)); 2853 tptr+=sizeof(struct in_addr); 2854 tmp-=sizeof(struct in_addr); 2855 2856 while (tmp>=4) { 2857 if (!TTEST2(*tptr, 4)) 2858 goto trunctlv; 2859 printf("\n\t Link-ID: 0x%08x", EXTRACT_32BITS(tptr)); 2860 tptr+=4; 2861 tmp-=4; 2862 } 2863 break; 2864 2865 case ISIS_TLV_LSP: 2866 tlv_lsp = (const struct isis_tlv_lsp *)tptr; 2867 while(tmp>=sizeof(struct isis_tlv_lsp)) { 2868 if (!TTEST((tlv_lsp->lsp_id)[LSP_ID_LEN-1])) 2869 goto trunctlv; 2870 printf("\n\t lsp-id: %s", 2871 isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN)); 2872 if (!TTEST2(tlv_lsp->sequence_number, 4)) 2873 goto trunctlv; 2874 printf(", seq: 0x%08x",EXTRACT_32BITS(tlv_lsp->sequence_number)); 2875 if (!TTEST2(tlv_lsp->remaining_lifetime, 2)) 2876 goto trunctlv; 2877 printf(", lifetime: %5ds",EXTRACT_16BITS(tlv_lsp->remaining_lifetime)); 2878 if (!TTEST2(tlv_lsp->checksum, 2)) 2879 goto trunctlv; 2880 printf(", chksum: 0x%04x",EXTRACT_16BITS(tlv_lsp->checksum)); 2881 tmp-=sizeof(struct isis_tlv_lsp); 2882 tlv_lsp++; 2883 } 2884 break; 2885 2886 case ISIS_TLV_CHECKSUM: 2887 if (tmp < ISIS_TLV_CHECKSUM_MINLEN) 2888 break; 2889 if (!TTEST2(*tptr, ISIS_TLV_CHECKSUM_MINLEN)) 2890 goto trunctlv; 2891 printf("\n\t checksum: 0x%04x ", EXTRACT_16BITS(tptr)); 2892 /* do not attempt to verify the checksum if it is zero 2893 * most likely a HMAC-MD5 TLV is also present and 2894 * to avoid conflicts the checksum TLV is zeroed. 2895 * see rfc3358 for details 2896 */ 2897 osi_print_cksum(optr, EXTRACT_16BITS(tptr), tptr-optr, length); 2898 break; 2899 2900 case ISIS_TLV_MT_SUPPORTED: 2901 if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN) 2902 break; 2903 while (tmp>1) { 2904 /* length can only be a multiple of 2, otherwise there is 2905 something broken -> so decode down until length is 1 */ 2906 if (tmp!=1) { 2907 mt_len = isis_print_mtid(tptr, "\n\t "); 2908 if (mt_len == 0) /* did something go wrong ? */ 2909 goto trunctlv; 2910 tptr+=mt_len; 2911 tmp-=mt_len; 2912 } else { 2913 printf("\n\t malformed MT-ID"); 2914 break; 2915 } 2916 } 2917 break; 2918 2919 case ISIS_TLV_RESTART_SIGNALING: 2920 /* first attempt to decode the flags */ 2921 if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN) 2922 break; 2923 if (!TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN)) 2924 goto trunctlv; 2925 printf("\n\t Flags [%s]", 2926 bittok2str(isis_restart_flag_values, "none", *tptr)); 2927 tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; 2928 tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; 2929 2930 /* is there anything other than the flags field? */ 2931 if (tmp == 0) 2932 break; 2933 2934 if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN) 2935 break; 2936 if (!TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)) 2937 goto trunctlv; 2938 2939 printf(", Remaining holding time %us", EXTRACT_16BITS(tptr)); 2940 tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; 2941 tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; 2942 2943 /* is there an additional sysid field present ?*/ 2944 if (tmp == SYSTEM_ID_LEN) { 2945 if (!TTEST2(*tptr, SYSTEM_ID_LEN)) 2946 goto trunctlv; 2947 printf(", for %s",isis_print_id(tptr,SYSTEM_ID_LEN)); 2948 } 2949 break; 2950 2951 case ISIS_TLV_IDRP_INFO: 2952 if (tmp < ISIS_TLV_IDRP_INFO_MINLEN) 2953 break; 2954 if (!TTEST2(*tptr, ISIS_TLV_IDRP_INFO_MINLEN)) 2955 goto trunctlv; 2956 printf("\n\t Inter-Domain Information Type: %s", 2957 tok2str(isis_subtlv_idrp_values, 2958 "Unknown (0x%02x)", 2959 *tptr)); 2960 switch (*tptr++) { 2961 case ISIS_SUBTLV_IDRP_ASN: 2962 if (!TTEST2(*tptr, 2)) /* fetch AS number */ 2963 goto trunctlv; 2964 printf("AS Number: %u",EXTRACT_16BITS(tptr)); 2965 break; 2966 case ISIS_SUBTLV_IDRP_LOCAL: 2967 case ISIS_SUBTLV_IDRP_RES: 2968 default: 2969 if(!print_unknown_data(tptr,"\n\t ",tlv_len-1)) 2970 return(0); 2971 break; 2972 } 2973 break; 2974 2975 case ISIS_TLV_LSP_BUFFERSIZE: 2976 if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN) 2977 break; 2978 if (!TTEST2(*tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN)) 2979 goto trunctlv; 2980 printf("\n\t LSP Buffersize: %u",EXTRACT_16BITS(tptr)); 2981 break; 2982 2983 case ISIS_TLV_PART_DIS: 2984 while (tmp >= SYSTEM_ID_LEN) { 2985 if (!TTEST2(*tptr, SYSTEM_ID_LEN)) 2986 goto trunctlv; 2987 printf("\n\t %s",isis_print_id(tptr,SYSTEM_ID_LEN)); 2988 tptr+=SYSTEM_ID_LEN; 2989 tmp-=SYSTEM_ID_LEN; 2990 } 2991 break; 2992 2993 case ISIS_TLV_PREFIX_NEIGH: 2994 if (tmp < sizeof(struct isis_metric_block)) 2995 break; 2996 if (!TTEST2(*tptr, sizeof(struct isis_metric_block))) 2997 goto trunctlv; 2998 printf("\n\t Metric Block"); 2999 isis_print_metric_block((const struct isis_metric_block *)tptr); 3000 tptr+=sizeof(struct isis_metric_block); 3001 tmp-=sizeof(struct isis_metric_block); 3002 3003 while(tmp>0) { 3004 if (!TTEST2(*tptr, 1)) 3005 goto trunctlv; 3006 prefix_len=*tptr++; /* read out prefix length in semioctets*/ 3007 if (prefix_len < 2) { 3008 printf("\n\t\tAddress: prefix length %u < 2", prefix_len); 3009 break; 3010 } 3011 tmp--; 3012 if (tmp < prefix_len/2) 3013 break; 3014 if (!TTEST2(*tptr, prefix_len/2)) 3015 goto trunctlv; 3016 printf("\n\t\tAddress: %s/%u", 3017 isonsap_string(tptr,prefix_len/2), 3018 prefix_len*4); 3019 tptr+=prefix_len/2; 3020 tmp-=prefix_len/2; 3021 } 3022 break; 3023 3024 case ISIS_TLV_IIH_SEQNR: 3025 if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN) 3026 break; 3027 if (!TTEST2(*tptr, ISIS_TLV_IIH_SEQNR_MINLEN)) /* check if four bytes are on the wire */ 3028 goto trunctlv; 3029 printf("\n\t Sequence number: %u", EXTRACT_32BITS(tptr) ); 3030 break; 3031 3032 case ISIS_TLV_VENDOR_PRIVATE: 3033 if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN) 3034 break; 3035 if (!TTEST2(*tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN)) /* check if enough byte for a full oui */ 3036 goto trunctlv; 3037 vendor_id = EXTRACT_24BITS(tptr); 3038 printf("\n\t Vendor: %s (%u)", 3039 tok2str(oui_values,"Unknown",vendor_id), 3040 vendor_id); 3041 tptr+=3; 3042 tmp-=3; 3043 if (tmp > 0) /* hexdump the rest */ 3044 if(!print_unknown_data(tptr,"\n\t\t",tmp)) 3045 return(0); 3046 break; 3047 /* 3048 * FIXME those are the defined TLVs that lack a decoder 3049 * you are welcome to contribute code ;-) 3050 */ 3051 3052 case ISIS_TLV_DECNET_PHASE4: 3053 case ISIS_TLV_LUCENT_PRIVATE: 3054 case ISIS_TLV_IPAUTH: 3055 case ISIS_TLV_NORTEL_PRIVATE1: 3056 case ISIS_TLV_NORTEL_PRIVATE2: 3057 3058 default: 3059 if (vflag <= 1) { 3060 if(!print_unknown_data(pptr,"\n\t\t",tlv_len)) 3061 return(0); 3062 } 3063 break; 3064 } 3065 /* do we want to see an additionally hexdump ? */ 3066 if (vflag> 1) { 3067 if(!print_unknown_data(pptr,"\n\t ",tlv_len)) 3068 return(0); 3069 } 3070 3071 pptr += tlv_len; 3072 packet_len -= tlv_len; 3073 } 3074 3075 if (packet_len != 0) { 3076 printf("\n\t %u straggler bytes", packet_len); 3077 } 3078 return (1); 3079 3080 trunc: 3081 fputs("[|isis]", stdout); 3082 return (1); 3083 3084 trunctlv: 3085 printf("\n\t\t packet exceeded snapshot"); 3086 return(1); 3087} 3088 3089static void 3090osi_print_cksum (const u_int8_t *pptr, u_int16_t checksum, 3091 u_int checksum_offset, u_int length) 3092{ 3093 u_int16_t calculated_checksum; 3094 3095 /* do not attempt to verify the checksum if it is zero */ 3096 if (!checksum) { 3097 printf("(unverified)"); 3098 } else { 3099 calculated_checksum = create_osi_cksum(pptr, checksum_offset, length); 3100 if (checksum == calculated_checksum) { 3101 printf(" (correct)"); 3102 } else { 3103 printf(" (incorrect should be 0x%04x)", calculated_checksum); 3104 } 3105 } 3106} 3107 3108/* 3109 * Local Variables: 3110 * c-style: whitesmith 3111 * c-basic-offset: 8 3112 * End: 3113 */ 3114