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@gredler.at) for more 24 * complete IS-IS & CLNP support. 25 */ 26 27/* \summary: ISO CLNS, ESIS, and ISIS printer */ 28 29#ifdef HAVE_CONFIG_H 30#include "config.h" 31#endif 32 33#include <netdissect-stdinc.h> 34 35#include <string.h> 36 37#include "netdissect.h" 38#include "addrtoname.h" 39#include "ether.h" 40#include "nlpid.h" 41#include "extract.h" 42#include "gmpls.h" 43#include "oui.h" 44#include "signature.h" 45 46static const char tstr[] = " [|isis]"; 47 48/* 49 * IS-IS is defined in ISO 10589. Look there for protocol definitions. 50 */ 51 52#define SYSTEM_ID_LEN ETHER_ADDR_LEN 53#define NODE_ID_LEN SYSTEM_ID_LEN+1 54#define LSP_ID_LEN SYSTEM_ID_LEN+2 55 56#define ISIS_VERSION 1 57#define ESIS_VERSION 1 58#define CLNP_VERSION 1 59 60#define ISIS_PDU_TYPE_MASK 0x1F 61#define ESIS_PDU_TYPE_MASK 0x1F 62#define CLNP_PDU_TYPE_MASK 0x1F 63#define CLNP_FLAG_MASK 0xE0 64#define ISIS_LAN_PRIORITY_MASK 0x7F 65 66#define ISIS_PDU_L1_LAN_IIH 15 67#define ISIS_PDU_L2_LAN_IIH 16 68#define ISIS_PDU_PTP_IIH 17 69#define ISIS_PDU_L1_LSP 18 70#define ISIS_PDU_L2_LSP 20 71#define ISIS_PDU_L1_CSNP 24 72#define ISIS_PDU_L2_CSNP 25 73#define ISIS_PDU_L1_PSNP 26 74#define ISIS_PDU_L2_PSNP 27 75 76static const struct tok isis_pdu_values[] = { 77 { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"}, 78 { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"}, 79 { ISIS_PDU_PTP_IIH, "p2p IIH"}, 80 { ISIS_PDU_L1_LSP, "L1 LSP"}, 81 { ISIS_PDU_L2_LSP, "L2 LSP"}, 82 { ISIS_PDU_L1_CSNP, "L1 CSNP"}, 83 { ISIS_PDU_L2_CSNP, "L2 CSNP"}, 84 { ISIS_PDU_L1_PSNP, "L1 PSNP"}, 85 { ISIS_PDU_L2_PSNP, "L2 PSNP"}, 86 { 0, NULL} 87}; 88 89/* 90 * A TLV is a tuple of a type, length and a value and is normally used for 91 * encoding information in all sorts of places. This is an enumeration of 92 * the well known types. 93 * 94 * list taken from rfc3359 plus some memory from veterans ;-) 95 */ 96 97#define ISIS_TLV_AREA_ADDR 1 /* iso10589 */ 98#define ISIS_TLV_IS_REACH 2 /* iso10589 */ 99#define ISIS_TLV_ESNEIGH 3 /* iso10589 */ 100#define ISIS_TLV_PART_DIS 4 /* iso10589 */ 101#define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */ 102#define ISIS_TLV_ISNEIGH 6 /* iso10589 */ 103#define ISIS_TLV_ISNEIGH_VARLEN 7 /* iso10589 */ 104#define ISIS_TLV_PADDING 8 /* iso10589 */ 105#define ISIS_TLV_LSP 9 /* iso10589 */ 106#define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */ 107#define ISIS_TLV_CHECKSUM 12 /* rfc3358 */ 108#define ISIS_TLV_CHECKSUM_MINLEN 2 109#define ISIS_TLV_POI 13 /* rfc6232 */ 110#define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */ 111#define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2 112#define ISIS_TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */ 113#define ISIS_TLV_IS_ALIAS_ID 24 /* draft-ietf-isis-ext-lsp-frags-02 */ 114#define ISIS_TLV_DECNET_PHASE4 42 115#define ISIS_TLV_LUCENT_PRIVATE 66 116#define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */ 117#define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */ 118#define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */ 119#define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */ 120#define ISIS_TLV_IDRP_INFO_MINLEN 1 121#define ISIS_TLV_IPADDR 132 /* rfc1195 */ 122#define ISIS_TLV_IPAUTH 133 /* rfc1195 */ 123#define ISIS_TLV_TE_ROUTER_ID 134 /* draft-ietf-isis-traffic-05 */ 124#define ISIS_TLV_EXTD_IP_REACH 135 /* draft-ietf-isis-traffic-05 */ 125#define ISIS_TLV_HOSTNAME 137 /* rfc2763 */ 126#define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */ 127#define ISIS_TLV_MT_PORT_CAP 143 /* rfc6165 */ 128#define ISIS_TLV_MT_CAPABILITY 144 /* rfc6329 */ 129#define ISIS_TLV_NORTEL_PRIVATE1 176 130#define ISIS_TLV_NORTEL_PRIVATE2 177 131#define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */ 132#define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1 133#define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2 134#define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */ 135#define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */ 136#define ISIS_TLV_MT_SUPPORTED_MINLEN 2 137#define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */ 138#define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */ 139#define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */ 140#define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */ 141#define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */ 142#define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */ 143#define ISIS_TLV_IIH_SEQNR_MINLEN 4 144#define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */ 145#define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3 146 147static const struct tok isis_tlv_values[] = { 148 { ISIS_TLV_AREA_ADDR, "Area address(es)"}, 149 { ISIS_TLV_IS_REACH, "IS Reachability"}, 150 { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"}, 151 { ISIS_TLV_PART_DIS, "Partition DIS"}, 152 { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"}, 153 { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"}, 154 { ISIS_TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"}, 155 { ISIS_TLV_PADDING, "Padding"}, 156 { ISIS_TLV_LSP, "LSP entries"}, 157 { ISIS_TLV_AUTH, "Authentication"}, 158 { ISIS_TLV_CHECKSUM, "Checksum"}, 159 { ISIS_TLV_POI, "Purge Originator Identifier"}, 160 { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"}, 161 { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"}, 162 { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"}, 163 { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"}, 164 { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"}, 165 { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"}, 166 { ISIS_TLV_PROTOCOLS, "Protocols supported"}, 167 { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"}, 168 { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"}, 169 { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"}, 170 { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"}, 171 { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"}, 172 { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"}, 173 { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"}, 174 { ISIS_TLV_MT_PORT_CAP, "Multi-Topology-Aware Port Capability"}, 175 { ISIS_TLV_MT_CAPABILITY, "Multi-Topology Capability"}, 176 { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"}, 177 { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"}, 178 { ISIS_TLV_HOSTNAME, "Hostname"}, 179 { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"}, 180 { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"}, 181 { ISIS_TLV_MT_SUPPORTED, "Multi Topology"}, 182 { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"}, 183 { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"}, 184 { ISIS_TLV_IP6_REACH, "IPv6 reachability"}, 185 { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"}, 186 { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"}, 187 { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"}, 188 { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"}, 189 { 0, NULL } 190}; 191 192#define ESIS_OPTION_PROTOCOLS 129 193#define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */ 194#define ESIS_OPTION_SECURITY 197 /* iso9542 */ 195#define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */ 196#define ESIS_OPTION_PRIORITY 205 /* iso9542 */ 197#define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */ 198#define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */ 199 200static const struct tok esis_option_values[] = { 201 { ESIS_OPTION_PROTOCOLS, "Protocols supported"}, 202 { ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" }, 203 { ESIS_OPTION_SECURITY, "Security" }, 204 { ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" }, 205 { ESIS_OPTION_PRIORITY, "Priority" }, 206 { ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" }, 207 { ESIS_OPTION_SNPA_MASK, "SNPA Mask" }, 208 { 0, NULL } 209}; 210 211#define CLNP_OPTION_DISCARD_REASON 193 212#define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */ 213#define CLNP_OPTION_SECURITY 197 /* iso8473 */ 214#define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */ 215#define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */ 216#define CLNP_OPTION_PADDING 204 /* iso8473 */ 217#define CLNP_OPTION_PRIORITY 205 /* iso8473 */ 218 219static const struct tok clnp_option_values[] = { 220 { CLNP_OPTION_DISCARD_REASON, "Discard Reason"}, 221 { CLNP_OPTION_PRIORITY, "Priority"}, 222 { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"}, 223 { CLNP_OPTION_SECURITY, "Security"}, 224 { CLNP_OPTION_SOURCE_ROUTING, "Source Routing"}, 225 { CLNP_OPTION_ROUTE_RECORDING, "Route Recording"}, 226 { CLNP_OPTION_PADDING, "Padding"}, 227 { 0, NULL } 228}; 229 230static const struct tok clnp_option_rfd_class_values[] = { 231 { 0x0, "General"}, 232 { 0x8, "Address"}, 233 { 0x9, "Source Routeing"}, 234 { 0xa, "Lifetime"}, 235 { 0xb, "PDU Discarded"}, 236 { 0xc, "Reassembly"}, 237 { 0, NULL } 238}; 239 240static const struct tok clnp_option_rfd_general_values[] = { 241 { 0x0, "Reason not specified"}, 242 { 0x1, "Protocol procedure error"}, 243 { 0x2, "Incorrect checksum"}, 244 { 0x3, "PDU discarded due to congestion"}, 245 { 0x4, "Header syntax error (cannot be parsed)"}, 246 { 0x5, "Segmentation needed but not permitted"}, 247 { 0x6, "Incomplete PDU received"}, 248 { 0x7, "Duplicate option"}, 249 { 0, NULL } 250}; 251 252static const struct tok clnp_option_rfd_address_values[] = { 253 { 0x0, "Destination address unreachable"}, 254 { 0x1, "Destination address unknown"}, 255 { 0, NULL } 256}; 257 258static const struct tok clnp_option_rfd_source_routeing_values[] = { 259 { 0x0, "Unspecified source routeing error"}, 260 { 0x1, "Syntax error in source routeing field"}, 261 { 0x2, "Unknown address in source routeing field"}, 262 { 0x3, "Path not acceptable"}, 263 { 0, NULL } 264}; 265 266static const struct tok clnp_option_rfd_lifetime_values[] = { 267 { 0x0, "Lifetime expired while data unit in transit"}, 268 { 0x1, "Lifetime expired during reassembly"}, 269 { 0, NULL } 270}; 271 272static const struct tok clnp_option_rfd_pdu_discard_values[] = { 273 { 0x0, "Unsupported option not specified"}, 274 { 0x1, "Unsupported protocol version"}, 275 { 0x2, "Unsupported security option"}, 276 { 0x3, "Unsupported source routeing option"}, 277 { 0x4, "Unsupported recording of route option"}, 278 { 0, NULL } 279}; 280 281static const struct tok clnp_option_rfd_reassembly_values[] = { 282 { 0x0, "Reassembly interference"}, 283 { 0, NULL } 284}; 285 286/* array of 16 error-classes */ 287static const struct tok *clnp_option_rfd_error_class[] = { 288 clnp_option_rfd_general_values, 289 NULL, 290 NULL, 291 NULL, 292 NULL, 293 NULL, 294 NULL, 295 NULL, 296 clnp_option_rfd_address_values, 297 clnp_option_rfd_source_routeing_values, 298 clnp_option_rfd_lifetime_values, 299 clnp_option_rfd_pdu_discard_values, 300 clnp_option_rfd_reassembly_values, 301 NULL, 302 NULL, 303 NULL 304}; 305 306#define CLNP_OPTION_OPTION_QOS_MASK 0x3f 307#define CLNP_OPTION_SCOPE_MASK 0xc0 308#define CLNP_OPTION_SCOPE_SA_SPEC 0x40 309#define CLNP_OPTION_SCOPE_DA_SPEC 0x80 310#define CLNP_OPTION_SCOPE_GLOBAL 0xc0 311 312static const struct tok clnp_option_scope_values[] = { 313 { CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"}, 314 { CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"}, 315 { CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"}, 316 { 0, NULL } 317}; 318 319static const struct tok clnp_option_sr_rr_values[] = { 320 { 0x0, "partial"}, 321 { 0x1, "complete"}, 322 { 0, NULL } 323}; 324 325static const struct tok clnp_option_sr_rr_string_values[] = { 326 { CLNP_OPTION_SOURCE_ROUTING, "source routing"}, 327 { CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"}, 328 { 0, NULL } 329}; 330 331static const struct tok clnp_option_qos_global_values[] = { 332 { 0x20, "reserved"}, 333 { 0x10, "sequencing vs. delay"}, 334 { 0x08, "congested"}, 335 { 0x04, "delay vs. cost"}, 336 { 0x02, "error vs. delay"}, 337 { 0x01, "error vs. cost"}, 338 { 0, NULL } 339}; 340 341#define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */ 342#define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */ 343#define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */ 344#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* draft-ietf-isis-traffic-05 */ 345#define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* draft-ietf-isis-traffic-05 */ 346#define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* draft-ietf-isis-traffic-05 */ 347#define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* draft-ietf-isis-traffic-05 */ 348#define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */ 349#define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */ 350#define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* draft-ietf-isis-traffic-05 */ 351#define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */ 352#define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */ 353#define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */ 354#define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */ 355 356#define ISIS_SUBTLV_SPB_METRIC 29 /* rfc6329 */ 357 358static const struct tok isis_ext_is_reach_subtlv_values[] = { 359 { ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" }, 360 { ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" }, 361 { ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" }, 362 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" }, 363 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" }, 364 { ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" }, 365 { ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" }, 366 { ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" }, 367 { ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" }, 368 { ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" }, 369 { ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" }, 370 { ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" }, 371 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" }, 372 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" }, 373 { ISIS_SUBTLV_SPB_METRIC, "SPB Metric" }, 374 { 250, "Reserved for cisco specific extensions" }, 375 { 251, "Reserved for cisco specific extensions" }, 376 { 252, "Reserved for cisco specific extensions" }, 377 { 253, "Reserved for cisco specific extensions" }, 378 { 254, "Reserved for cisco specific extensions" }, 379 { 255, "Reserved for future expansion" }, 380 { 0, NULL } 381}; 382 383#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */ 384#define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */ 385#define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */ 386 387static const struct tok isis_ext_ip_reach_subtlv_values[] = { 388 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" }, 389 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" }, 390 { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" }, 391 { 0, NULL } 392}; 393 394static const struct tok isis_subtlv_link_attribute_values[] = { 395 { 0x01, "Local Protection Available" }, 396 { 0x02, "Link excluded from local protection path" }, 397 { 0x04, "Local maintenance required"}, 398 { 0, NULL } 399}; 400 401#define ISIS_SUBTLV_AUTH_SIMPLE 1 402#define ISIS_SUBTLV_AUTH_GENERIC 3 /* rfc 5310 */ 403#define ISIS_SUBTLV_AUTH_MD5 54 404#define ISIS_SUBTLV_AUTH_MD5_LEN 16 405#define ISIS_SUBTLV_AUTH_PRIVATE 255 406 407static const struct tok isis_subtlv_auth_values[] = { 408 { ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"}, 409 { ISIS_SUBTLV_AUTH_GENERIC, "Generic Crypto key-id"}, 410 { ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"}, 411 { ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"}, 412 { 0, NULL } 413}; 414 415#define ISIS_SUBTLV_IDRP_RES 0 416#define ISIS_SUBTLV_IDRP_LOCAL 1 417#define ISIS_SUBTLV_IDRP_ASN 2 418 419static const struct tok isis_subtlv_idrp_values[] = { 420 { ISIS_SUBTLV_IDRP_RES, "Reserved"}, 421 { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"}, 422 { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"}, 423 { 0, NULL} 424}; 425 426#define ISIS_SUBTLV_SPB_MCID 4 427#define ISIS_SUBTLV_SPB_DIGEST 5 428#define ISIS_SUBTLV_SPB_BVID 6 429 430#define ISIS_SUBTLV_SPB_INSTANCE 1 431#define ISIS_SUBTLV_SPBM_SI 3 432 433#define ISIS_SPB_MCID_LEN 51 434#define ISIS_SUBTLV_SPB_MCID_MIN_LEN 102 435#define ISIS_SUBTLV_SPB_DIGEST_MIN_LEN 33 436#define ISIS_SUBTLV_SPB_BVID_MIN_LEN 6 437#define ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN 19 438#define ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN 8 439 440static const struct tok isis_mt_port_cap_subtlv_values[] = { 441 { ISIS_SUBTLV_SPB_MCID, "SPB MCID" }, 442 { ISIS_SUBTLV_SPB_DIGEST, "SPB Digest" }, 443 { ISIS_SUBTLV_SPB_BVID, "SPB BVID" }, 444 { 0, NULL } 445}; 446 447static const struct tok isis_mt_capability_subtlv_values[] = { 448 { ISIS_SUBTLV_SPB_INSTANCE, "SPB Instance" }, 449 { ISIS_SUBTLV_SPBM_SI, "SPBM Service Identifier and Unicast Address" }, 450 { 0, NULL } 451}; 452 453struct isis_spb_mcid { 454 uint8_t format_id; 455 uint8_t name[32]; 456 uint8_t revision_lvl[2]; 457 uint8_t digest[16]; 458}; 459 460struct isis_subtlv_spb_mcid { 461 struct isis_spb_mcid mcid; 462 struct isis_spb_mcid aux_mcid; 463}; 464 465struct isis_subtlv_spb_instance { 466 uint8_t cist_root_id[8]; 467 uint8_t cist_external_root_path_cost[4]; 468 uint8_t bridge_priority[2]; 469 uint8_t spsourceid[4]; 470 uint8_t no_of_trees; 471}; 472 473#define CLNP_SEGMENT_PART 0x80 474#define CLNP_MORE_SEGMENTS 0x40 475#define CLNP_REQUEST_ER 0x20 476 477static const struct tok clnp_flag_values[] = { 478 { CLNP_SEGMENT_PART, "Segmentation permitted"}, 479 { CLNP_MORE_SEGMENTS, "more Segments"}, 480 { CLNP_REQUEST_ER, "request Error Report"}, 481 { 0, NULL} 482}; 483 484#define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4) 485#define ISIS_MASK_LSP_ISTYPE_BITS(x) ((x)&0x3) 486#define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80) 487#define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78) 488#define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40) 489#define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20) 490#define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10) 491#define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8) 492 493#define ISIS_MASK_MTID(x) ((x)&0x0fff) 494#define ISIS_MASK_MTFLAGS(x) ((x)&0xf000) 495 496static const struct tok isis_mt_flag_values[] = { 497 { 0x4000, "ATT bit set"}, 498 { 0x8000, "Overload bit set"}, 499 { 0, NULL} 500}; 501 502#define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80) 503#define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40) 504 505#define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40) 506#define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20) 507 508#define ISIS_LSP_TLV_METRIC_SUPPORTED(x) ((x)&0x80) 509#define ISIS_LSP_TLV_METRIC_IE(x) ((x)&0x40) 510#define ISIS_LSP_TLV_METRIC_UPDOWN(x) ((x)&0x80) 511#define ISIS_LSP_TLV_METRIC_VALUE(x) ((x)&0x3f) 512 513#define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1) 514 515static const struct tok isis_mt_values[] = { 516 { 0, "IPv4 unicast"}, 517 { 1, "In-Band Management"}, 518 { 2, "IPv6 unicast"}, 519 { 3, "Multicast"}, 520 { 4095, "Development, Experimental or Proprietary"}, 521 { 0, NULL } 522}; 523 524static const struct tok isis_iih_circuit_type_values[] = { 525 { 1, "Level 1 only"}, 526 { 2, "Level 2 only"}, 527 { 3, "Level 1, Level 2"}, 528 { 0, NULL} 529}; 530 531#define ISIS_LSP_TYPE_UNUSED0 0 532#define ISIS_LSP_TYPE_LEVEL_1 1 533#define ISIS_LSP_TYPE_UNUSED2 2 534#define ISIS_LSP_TYPE_LEVEL_2 3 535 536static const struct tok isis_lsp_istype_values[] = { 537 { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"}, 538 { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"}, 539 { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"}, 540 { ISIS_LSP_TYPE_LEVEL_2, "L2 IS"}, 541 { 0, NULL } 542}; 543 544/* 545 * Katz's point to point adjacency TLV uses codes to tell us the state of 546 * the remote adjacency. Enumerate them. 547 */ 548 549#define ISIS_PTP_ADJ_UP 0 550#define ISIS_PTP_ADJ_INIT 1 551#define ISIS_PTP_ADJ_DOWN 2 552 553static const struct tok isis_ptp_adjancey_values[] = { 554 { ISIS_PTP_ADJ_UP, "Up" }, 555 { ISIS_PTP_ADJ_INIT, "Initializing" }, 556 { ISIS_PTP_ADJ_DOWN, "Down" }, 557 { 0, NULL} 558}; 559 560struct isis_tlv_ptp_adj { 561 uint8_t adjacency_state; 562 uint8_t extd_local_circuit_id[4]; 563 uint8_t neighbor_sysid[SYSTEM_ID_LEN]; 564 uint8_t neighbor_extd_local_circuit_id[4]; 565}; 566 567static void osi_print_cksum(netdissect_options *, const uint8_t *pptr, 568 uint16_t checksum, int checksum_offset, u_int length); 569static int clnp_print(netdissect_options *, const uint8_t *, u_int); 570static void esis_print(netdissect_options *, const uint8_t *, u_int); 571static int isis_print(netdissect_options *, const uint8_t *, u_int); 572 573struct isis_metric_block { 574 uint8_t metric_default; 575 uint8_t metric_delay; 576 uint8_t metric_expense; 577 uint8_t metric_error; 578}; 579 580struct isis_tlv_is_reach { 581 struct isis_metric_block isis_metric_block; 582 uint8_t neighbor_nodeid[NODE_ID_LEN]; 583}; 584 585struct isis_tlv_es_reach { 586 struct isis_metric_block isis_metric_block; 587 uint8_t neighbor_sysid[SYSTEM_ID_LEN]; 588}; 589 590struct isis_tlv_ip_reach { 591 struct isis_metric_block isis_metric_block; 592 uint8_t prefix[4]; 593 uint8_t mask[4]; 594}; 595 596static const struct tok isis_is_reach_virtual_values[] = { 597 { 0, "IsNotVirtual"}, 598 { 1, "IsVirtual"}, 599 { 0, NULL } 600}; 601 602static const struct tok isis_restart_flag_values[] = { 603 { 0x1, "Restart Request"}, 604 { 0x2, "Restart Acknowledgement"}, 605 { 0x4, "Suppress adjacency advertisement"}, 606 { 0, NULL } 607}; 608 609struct isis_common_header { 610 uint8_t nlpid; 611 uint8_t fixed_len; 612 uint8_t version; /* Protocol version */ 613 uint8_t id_length; 614 uint8_t pdu_type; /* 3 MSbits are reserved */ 615 uint8_t pdu_version; /* Packet format version */ 616 uint8_t reserved; 617 uint8_t max_area; 618}; 619 620struct isis_iih_lan_header { 621 uint8_t circuit_type; 622 uint8_t source_id[SYSTEM_ID_LEN]; 623 uint8_t holding_time[2]; 624 uint8_t pdu_len[2]; 625 uint8_t priority; 626 uint8_t lan_id[NODE_ID_LEN]; 627}; 628 629struct isis_iih_ptp_header { 630 uint8_t circuit_type; 631 uint8_t source_id[SYSTEM_ID_LEN]; 632 uint8_t holding_time[2]; 633 uint8_t pdu_len[2]; 634 uint8_t circuit_id; 635}; 636 637struct isis_lsp_header { 638 uint8_t pdu_len[2]; 639 uint8_t remaining_lifetime[2]; 640 uint8_t lsp_id[LSP_ID_LEN]; 641 uint8_t sequence_number[4]; 642 uint8_t checksum[2]; 643 uint8_t typeblock; 644}; 645 646struct isis_csnp_header { 647 uint8_t pdu_len[2]; 648 uint8_t source_id[NODE_ID_LEN]; 649 uint8_t start_lsp_id[LSP_ID_LEN]; 650 uint8_t end_lsp_id[LSP_ID_LEN]; 651}; 652 653struct isis_psnp_header { 654 uint8_t pdu_len[2]; 655 uint8_t source_id[NODE_ID_LEN]; 656}; 657 658struct isis_tlv_lsp { 659 uint8_t remaining_lifetime[2]; 660 uint8_t lsp_id[LSP_ID_LEN]; 661 uint8_t sequence_number[4]; 662 uint8_t checksum[2]; 663}; 664 665#define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header)) 666#define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header)) 667#define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header)) 668#define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header)) 669#define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header)) 670#define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header)) 671 672void 673isoclns_print(netdissect_options *ndo, const uint8_t *p, u_int length) 674{ 675 if (!ND_TTEST(*p)) { /* enough bytes on the wire ? */ 676 ND_PRINT((ndo, "|OSI")); 677 return; 678 } 679 680 if (ndo->ndo_eflag) 681 ND_PRINT((ndo, "OSI NLPID %s (0x%02x): ", tok2str(nlpid_values, "Unknown", *p), *p)); 682 683 switch (*p) { 684 685 case NLPID_CLNP: 686 if (!clnp_print(ndo, p, length)) 687 print_unknown_data(ndo, p, "\n\t", length); 688 break; 689 690 case NLPID_ESIS: 691 esis_print(ndo, p, length); 692 return; 693 694 case NLPID_ISIS: 695 if (!isis_print(ndo, p, length)) 696 print_unknown_data(ndo, p, "\n\t", length); 697 break; 698 699 case NLPID_NULLNS: 700 ND_PRINT((ndo, "%slength: %u", ndo->ndo_eflag ? "" : ", ", length)); 701 break; 702 703 case NLPID_Q933: 704 q933_print(ndo, p + 1, length - 1); 705 break; 706 707 case NLPID_IP: 708 ip_print(ndo, p + 1, length - 1); 709 break; 710 711 case NLPID_IP6: 712 ip6_print(ndo, p + 1, length - 1); 713 break; 714 715 case NLPID_PPP: 716 ppp_print(ndo, p + 1, length - 1); 717 break; 718 719 default: 720 if (!ndo->ndo_eflag) 721 ND_PRINT((ndo, "OSI NLPID 0x%02x unknown", *p)); 722 ND_PRINT((ndo, "%slength: %u", ndo->ndo_eflag ? "" : ", ", length)); 723 if (length > 1) 724 print_unknown_data(ndo, p, "\n\t", length); 725 break; 726 } 727} 728 729#define CLNP_PDU_ER 1 730#define CLNP_PDU_DT 28 731#define CLNP_PDU_MD 29 732#define CLNP_PDU_ERQ 30 733#define CLNP_PDU_ERP 31 734 735static const struct tok clnp_pdu_values[] = { 736 { CLNP_PDU_ER, "Error Report"}, 737 { CLNP_PDU_MD, "MD"}, 738 { CLNP_PDU_DT, "Data"}, 739 { CLNP_PDU_ERQ, "Echo Request"}, 740 { CLNP_PDU_ERP, "Echo Response"}, 741 { 0, NULL } 742}; 743 744struct clnp_header_t { 745 uint8_t nlpid; 746 uint8_t length_indicator; 747 uint8_t version; 748 uint8_t lifetime; /* units of 500ms */ 749 uint8_t type; 750 uint8_t segment_length[2]; 751 uint8_t cksum[2]; 752}; 753 754struct clnp_segment_header_t { 755 uint8_t data_unit_id[2]; 756 uint8_t segment_offset[2]; 757 uint8_t total_length[2]; 758}; 759 760/* 761 * clnp_print 762 * Decode CLNP packets. Return 0 on error. 763 */ 764 765static int 766clnp_print(netdissect_options *ndo, 767 const uint8_t *pptr, u_int length) 768{ 769 const uint8_t *optr,*source_address,*dest_address; 770 u_int li,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags; 771 const struct clnp_header_t *clnp_header; 772 const struct clnp_segment_header_t *clnp_segment_header; 773 uint8_t rfd_error_major,rfd_error_minor; 774 775 clnp_header = (const struct clnp_header_t *) pptr; 776 ND_TCHECK(*clnp_header); 777 778 li = clnp_header->length_indicator; 779 optr = pptr; 780 781 if (!ndo->ndo_eflag) 782 ND_PRINT((ndo, "CLNP")); 783 784 /* 785 * Sanity checking of the header. 786 */ 787 788 if (clnp_header->version != CLNP_VERSION) { 789 ND_PRINT((ndo, "version %d packet not supported", clnp_header->version)); 790 return (0); 791 } 792 793 if (li > length) { 794 ND_PRINT((ndo, " length indicator(%u) > PDU size (%u)!", li, length)); 795 return (0); 796 } 797 798 if (li < sizeof(struct clnp_header_t)) { 799 ND_PRINT((ndo, " length indicator %u < min PDU size:", li)); 800 while (pptr < ndo->ndo_snapend) 801 ND_PRINT((ndo, "%02X", *pptr++)); 802 return (0); 803 } 804 805 /* FIXME further header sanity checking */ 806 807 clnp_pdu_type = clnp_header->type & CLNP_PDU_TYPE_MASK; 808 clnp_flags = clnp_header->type & CLNP_FLAG_MASK; 809 810 pptr += sizeof(struct clnp_header_t); 811 li -= sizeof(struct clnp_header_t); 812 813 if (li < 1) { 814 ND_PRINT((ndo, "li < size of fixed part of CLNP header and addresses")); 815 return (0); 816 } 817 ND_TCHECK(*pptr); 818 dest_address_length = *pptr; 819 pptr += 1; 820 li -= 1; 821 if (li < dest_address_length) { 822 ND_PRINT((ndo, "li < size of fixed part of CLNP header and addresses")); 823 return (0); 824 } 825 ND_TCHECK2(*pptr, dest_address_length); 826 dest_address = pptr; 827 pptr += dest_address_length; 828 li -= dest_address_length; 829 830 if (li < 1) { 831 ND_PRINT((ndo, "li < size of fixed part of CLNP header and addresses")); 832 return (0); 833 } 834 ND_TCHECK(*pptr); 835 source_address_length = *pptr; 836 pptr += 1; 837 li -= 1; 838 if (li < source_address_length) { 839 ND_PRINT((ndo, "li < size of fixed part of CLNP header and addresses")); 840 return (0); 841 } 842 ND_TCHECK2(*pptr, source_address_length); 843 source_address = pptr; 844 pptr += source_address_length; 845 li -= source_address_length; 846 847 if (ndo->ndo_vflag < 1) { 848 ND_PRINT((ndo, "%s%s > %s, %s, length %u", 849 ndo->ndo_eflag ? "" : ", ", 850 isonsap_string(ndo, source_address, source_address_length), 851 isonsap_string(ndo, dest_address, dest_address_length), 852 tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type), 853 length)); 854 return (1); 855 } 856 ND_PRINT((ndo, "%slength %u", ndo->ndo_eflag ? "" : ", ", length)); 857 858 ND_PRINT((ndo, "\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x", 859 tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type), 860 clnp_header->length_indicator, 861 clnp_header->version, 862 clnp_header->lifetime/2, 863 (clnp_header->lifetime%2)*5, 864 EXTRACT_16BITS(clnp_header->segment_length), 865 EXTRACT_16BITS(clnp_header->cksum))); 866 867 osi_print_cksum(ndo, optr, EXTRACT_16BITS(clnp_header->cksum), 7, 868 clnp_header->length_indicator); 869 870 ND_PRINT((ndo, "\n\tFlags [%s]", 871 bittok2str(clnp_flag_values, "none", clnp_flags))); 872 873 ND_PRINT((ndo, "\n\tsource address (length %u): %s\n\tdest address (length %u): %s", 874 source_address_length, 875 isonsap_string(ndo, source_address, source_address_length), 876 dest_address_length, 877 isonsap_string(ndo, dest_address, dest_address_length))); 878 879 if (clnp_flags & CLNP_SEGMENT_PART) { 880 if (li < sizeof(const struct clnp_segment_header_t)) { 881 ND_PRINT((ndo, "li < size of fixed part of CLNP header, addresses, and segment part")); 882 return (0); 883 } 884 clnp_segment_header = (const struct clnp_segment_header_t *) pptr; 885 ND_TCHECK(*clnp_segment_header); 886 ND_PRINT((ndo, "\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u", 887 EXTRACT_16BITS(clnp_segment_header->data_unit_id), 888 EXTRACT_16BITS(clnp_segment_header->segment_offset), 889 EXTRACT_16BITS(clnp_segment_header->total_length))); 890 pptr+=sizeof(const struct clnp_segment_header_t); 891 li-=sizeof(const struct clnp_segment_header_t); 892 } 893 894 /* now walk the options */ 895 while (li >= 2) { 896 u_int op, opli; 897 const uint8_t *tptr; 898 899 if (li < 2) { 900 ND_PRINT((ndo, ", bad opts/li")); 901 return (0); 902 } 903 ND_TCHECK2(*pptr, 2); 904 op = *pptr++; 905 opli = *pptr++; 906 li -= 2; 907 if (opli > li) { 908 ND_PRINT((ndo, ", opt (%d) too long", op)); 909 return (0); 910 } 911 ND_TCHECK2(*pptr, opli); 912 li -= opli; 913 tptr = pptr; 914 tlen = opli; 915 916 ND_PRINT((ndo, "\n\t %s Option #%u, length %u, value: ", 917 tok2str(clnp_option_values,"Unknown",op), 918 op, 919 opli)); 920 921 /* 922 * We've already checked that the entire option is present 923 * in the captured packet with the ND_TCHECK2() call. 924 * Therefore, we don't need to do ND_TCHECK()/ND_TCHECK2() 925 * checks. 926 * We do, however, need to check tlen, to make sure we 927 * don't run past the end of the option. 928 */ 929 switch (op) { 930 931 932 case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */ 933 case CLNP_OPTION_SOURCE_ROUTING: 934 if (tlen < 2) { 935 ND_PRINT((ndo, ", bad opt len")); 936 return (0); 937 } 938 ND_PRINT((ndo, "%s %s", 939 tok2str(clnp_option_sr_rr_values,"Unknown",*tptr), 940 tok2str(clnp_option_sr_rr_string_values, "Unknown Option %u", op))); 941 nsap_offset=*(tptr+1); 942 if (nsap_offset == 0) { 943 ND_PRINT((ndo, " Bad NSAP offset (0)")); 944 break; 945 } 946 nsap_offset-=1; /* offset to nsap list */ 947 if (nsap_offset > tlen) { 948 ND_PRINT((ndo, " Bad NSAP offset (past end of option)")); 949 break; 950 } 951 tptr+=nsap_offset; 952 tlen-=nsap_offset; 953 while (tlen > 0) { 954 source_address_length=*tptr; 955 if (tlen < source_address_length+1) { 956 ND_PRINT((ndo, "\n\t NSAP address goes past end of option")); 957 break; 958 } 959 if (source_address_length > 0) { 960 source_address=(tptr+1); 961 ND_TCHECK2(*source_address, source_address_length); 962 ND_PRINT((ndo, "\n\t NSAP address (length %u): %s", 963 source_address_length, 964 isonsap_string(ndo, source_address, source_address_length))); 965 } 966 tlen-=source_address_length+1; 967 } 968 break; 969 970 case CLNP_OPTION_PRIORITY: 971 if (tlen < 1) { 972 ND_PRINT((ndo, ", bad opt len")); 973 return (0); 974 } 975 ND_PRINT((ndo, "0x%1x", *tptr&0x0f)); 976 break; 977 978 case CLNP_OPTION_QOS_MAINTENANCE: 979 if (tlen < 1) { 980 ND_PRINT((ndo, ", bad opt len")); 981 return (0); 982 } 983 ND_PRINT((ndo, "\n\t Format Code: %s", 984 tok2str(clnp_option_scope_values, "Reserved", *tptr&CLNP_OPTION_SCOPE_MASK))); 985 986 if ((*tptr&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL) 987 ND_PRINT((ndo, "\n\t QoS Flags [%s]", 988 bittok2str(clnp_option_qos_global_values, 989 "none", 990 *tptr&CLNP_OPTION_OPTION_QOS_MASK))); 991 break; 992 993 case CLNP_OPTION_SECURITY: 994 if (tlen < 2) { 995 ND_PRINT((ndo, ", bad opt len")); 996 return (0); 997 } 998 ND_PRINT((ndo, "\n\t Format Code: %s, Security-Level %u", 999 tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK), 1000 *(tptr+1))); 1001 break; 1002 1003 case CLNP_OPTION_DISCARD_REASON: 1004 if (tlen < 1) { 1005 ND_PRINT((ndo, ", bad opt len")); 1006 return (0); 1007 } 1008 rfd_error_major = (*tptr&0xf0) >> 4; 1009 rfd_error_minor = *tptr&0x0f; 1010 ND_PRINT((ndo, "\n\t Class: %s Error (0x%01x), %s (0x%01x)", 1011 tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major), 1012 rfd_error_major, 1013 tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor), 1014 rfd_error_minor)); 1015 break; 1016 1017 case CLNP_OPTION_PADDING: 1018 ND_PRINT((ndo, "padding data")); 1019 break; 1020 1021 /* 1022 * FIXME those are the defined Options that lack a decoder 1023 * you are welcome to contribute code ;-) 1024 */ 1025 1026 default: 1027 print_unknown_data(ndo, tptr, "\n\t ", opli); 1028 break; 1029 } 1030 if (ndo->ndo_vflag > 1) 1031 print_unknown_data(ndo, pptr, "\n\t ", opli); 1032 pptr += opli; 1033 } 1034 1035 switch (clnp_pdu_type) { 1036 1037 case CLNP_PDU_ER: /* fall through */ 1038 case CLNP_PDU_ERP: 1039 ND_TCHECK(*pptr); 1040 if (*(pptr) == NLPID_CLNP) { 1041 ND_PRINT((ndo, "\n\t-----original packet-----\n\t")); 1042 /* FIXME recursion protection */ 1043 clnp_print(ndo, pptr, length - clnp_header->length_indicator); 1044 break; 1045 } 1046 1047 case CLNP_PDU_DT: 1048 case CLNP_PDU_MD: 1049 case CLNP_PDU_ERQ: 1050 1051 default: 1052 /* dump the PDU specific data */ 1053 if (length-(pptr-optr) > 0) { 1054 ND_PRINT((ndo, "\n\t undecoded non-header data, length %u", length-clnp_header->length_indicator)); 1055 print_unknown_data(ndo, pptr, "\n\t ", length - (pptr - optr)); 1056 } 1057 } 1058 1059 return (1); 1060 1061 trunc: 1062 ND_PRINT((ndo, "[|clnp]")); 1063 return (1); 1064 1065} 1066 1067 1068#define ESIS_PDU_REDIRECT 6 1069#define ESIS_PDU_ESH 2 1070#define ESIS_PDU_ISH 4 1071 1072static const struct tok esis_pdu_values[] = { 1073 { ESIS_PDU_REDIRECT, "redirect"}, 1074 { ESIS_PDU_ESH, "ESH"}, 1075 { ESIS_PDU_ISH, "ISH"}, 1076 { 0, NULL } 1077}; 1078 1079struct esis_header_t { 1080 uint8_t nlpid; 1081 uint8_t length_indicator; 1082 uint8_t version; 1083 uint8_t reserved; 1084 uint8_t type; 1085 uint8_t holdtime[2]; 1086 uint8_t cksum[2]; 1087}; 1088 1089static void 1090esis_print(netdissect_options *ndo, 1091 const uint8_t *pptr, u_int length) 1092{ 1093 const uint8_t *optr; 1094 u_int li,esis_pdu_type,source_address_length, source_address_number; 1095 const struct esis_header_t *esis_header; 1096 1097 if (!ndo->ndo_eflag) 1098 ND_PRINT((ndo, "ES-IS")); 1099 1100 if (length <= 2) { 1101 ND_PRINT((ndo, ndo->ndo_qflag ? "bad pkt!" : "no header at all!")); 1102 return; 1103 } 1104 1105 esis_header = (const struct esis_header_t *) pptr; 1106 ND_TCHECK(*esis_header); 1107 li = esis_header->length_indicator; 1108 optr = pptr; 1109 1110 /* 1111 * Sanity checking of the header. 1112 */ 1113 1114 if (esis_header->nlpid != NLPID_ESIS) { 1115 ND_PRINT((ndo, " nlpid 0x%02x packet not supported", esis_header->nlpid)); 1116 return; 1117 } 1118 1119 if (esis_header->version != ESIS_VERSION) { 1120 ND_PRINT((ndo, " version %d packet not supported", esis_header->version)); 1121 return; 1122 } 1123 1124 if (li > length) { 1125 ND_PRINT((ndo, " length indicator(%u) > PDU size (%u)!", li, length)); 1126 return; 1127 } 1128 1129 if (li < sizeof(struct esis_header_t) + 2) { 1130 ND_PRINT((ndo, " length indicator %u < min PDU size:", li)); 1131 while (pptr < ndo->ndo_snapend) 1132 ND_PRINT((ndo, "%02X", *pptr++)); 1133 return; 1134 } 1135 1136 esis_pdu_type = esis_header->type & ESIS_PDU_TYPE_MASK; 1137 1138 if (ndo->ndo_vflag < 1) { 1139 ND_PRINT((ndo, "%s%s, length %u", 1140 ndo->ndo_eflag ? "" : ", ", 1141 tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type), 1142 length)); 1143 return; 1144 } else 1145 ND_PRINT((ndo, "%slength %u\n\t%s (%u)", 1146 ndo->ndo_eflag ? "" : ", ", 1147 length, 1148 tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type), 1149 esis_pdu_type)); 1150 1151 ND_PRINT((ndo, ", v: %u%s", esis_header->version, esis_header->version == ESIS_VERSION ? "" : "unsupported" )); 1152 ND_PRINT((ndo, ", checksum: 0x%04x", EXTRACT_16BITS(esis_header->cksum))); 1153 1154 osi_print_cksum(ndo, pptr, EXTRACT_16BITS(esis_header->cksum), 7, li); 1155 1156 ND_PRINT((ndo, ", holding time: %us, length indicator: %u", 1157 EXTRACT_16BITS(esis_header->holdtime), li)); 1158 1159 if (ndo->ndo_vflag > 1) 1160 print_unknown_data(ndo, optr, "\n\t", sizeof(struct esis_header_t)); 1161 1162 pptr += sizeof(struct esis_header_t); 1163 li -= sizeof(struct esis_header_t); 1164 1165 switch (esis_pdu_type) { 1166 case ESIS_PDU_REDIRECT: { 1167 const uint8_t *dst, *snpa, *neta; 1168 u_int dstl, snpal, netal; 1169 1170 ND_TCHECK(*pptr); 1171 if (li < 1) { 1172 ND_PRINT((ndo, ", bad redirect/li")); 1173 return; 1174 } 1175 dstl = *pptr; 1176 pptr++; 1177 li--; 1178 ND_TCHECK2(*pptr, dstl); 1179 if (li < dstl) { 1180 ND_PRINT((ndo, ", bad redirect/li")); 1181 return; 1182 } 1183 dst = pptr; 1184 pptr += dstl; 1185 li -= dstl; 1186 ND_PRINT((ndo, "\n\t %s", isonsap_string(ndo, dst, dstl))); 1187 1188 ND_TCHECK(*pptr); 1189 if (li < 1) { 1190 ND_PRINT((ndo, ", bad redirect/li")); 1191 return; 1192 } 1193 snpal = *pptr; 1194 pptr++; 1195 li--; 1196 ND_TCHECK2(*pptr, snpal); 1197 if (li < snpal) { 1198 ND_PRINT((ndo, ", bad redirect/li")); 1199 return; 1200 } 1201 snpa = pptr; 1202 pptr += snpal; 1203 li -= snpal; 1204 ND_TCHECK(*pptr); 1205 if (li < 1) { 1206 ND_PRINT((ndo, ", bad redirect/li")); 1207 return; 1208 } 1209 netal = *pptr; 1210 pptr++; 1211 ND_TCHECK2(*pptr, netal); 1212 if (li < netal) { 1213 ND_PRINT((ndo, ", bad redirect/li")); 1214 return; 1215 } 1216 neta = pptr; 1217 pptr += netal; 1218 li -= netal; 1219 1220 if (snpal == 6) 1221 ND_PRINT((ndo, "\n\t SNPA (length: %u): %s", 1222 snpal, 1223 etheraddr_string(ndo, snpa))); 1224 else 1225 ND_PRINT((ndo, "\n\t SNPA (length: %u): %s", 1226 snpal, 1227 linkaddr_string(ndo, snpa, LINKADDR_OTHER, snpal))); 1228 if (netal != 0) 1229 ND_PRINT((ndo, "\n\t NET (length: %u) %s", 1230 netal, 1231 isonsap_string(ndo, neta, netal))); 1232 break; 1233 } 1234 1235 case ESIS_PDU_ESH: 1236 ND_TCHECK(*pptr); 1237 if (li < 1) { 1238 ND_PRINT((ndo, ", bad esh/li")); 1239 return; 1240 } 1241 source_address_number = *pptr; 1242 pptr++; 1243 li--; 1244 1245 ND_PRINT((ndo, "\n\t Number of Source Addresses: %u", source_address_number)); 1246 1247 while (source_address_number > 0) { 1248 ND_TCHECK(*pptr); 1249 if (li < 1) { 1250 ND_PRINT((ndo, ", bad esh/li")); 1251 return; 1252 } 1253 source_address_length = *pptr; 1254 pptr++; 1255 li--; 1256 1257 ND_TCHECK2(*pptr, source_address_length); 1258 if (li < source_address_length) { 1259 ND_PRINT((ndo, ", bad esh/li")); 1260 return; 1261 } 1262 ND_PRINT((ndo, "\n\t NET (length: %u): %s", 1263 source_address_length, 1264 isonsap_string(ndo, pptr, source_address_length))); 1265 pptr += source_address_length; 1266 li -= source_address_length; 1267 source_address_number--; 1268 } 1269 1270 break; 1271 1272 case ESIS_PDU_ISH: { 1273 ND_TCHECK(*pptr); 1274 if (li < 1) { 1275 ND_PRINT((ndo, ", bad ish/li")); 1276 return; 1277 } 1278 source_address_length = *pptr; 1279 pptr++; 1280 li--; 1281 ND_TCHECK2(*pptr, source_address_length); 1282 if (li < source_address_length) { 1283 ND_PRINT((ndo, ", bad ish/li")); 1284 return; 1285 } 1286 ND_PRINT((ndo, "\n\t NET (length: %u): %s", source_address_length, isonsap_string(ndo, pptr, source_address_length))); 1287 pptr += source_address_length; 1288 li -= source_address_length; 1289 break; 1290 } 1291 1292 default: 1293 if (ndo->ndo_vflag <= 1) { 1294 if (pptr < ndo->ndo_snapend) 1295 print_unknown_data(ndo, pptr, "\n\t ", ndo->ndo_snapend - pptr); 1296 } 1297 return; 1298 } 1299 1300 /* now walk the options */ 1301 while (li != 0) { 1302 u_int op, opli; 1303 const uint8_t *tptr; 1304 1305 if (li < 2) { 1306 ND_PRINT((ndo, ", bad opts/li")); 1307 return; 1308 } 1309 ND_TCHECK2(*pptr, 2); 1310 op = *pptr++; 1311 opli = *pptr++; 1312 li -= 2; 1313 if (opli > li) { 1314 ND_PRINT((ndo, ", opt (%d) too long", op)); 1315 return; 1316 } 1317 li -= opli; 1318 tptr = pptr; 1319 1320 ND_PRINT((ndo, "\n\t %s Option #%u, length %u, value: ", 1321 tok2str(esis_option_values,"Unknown",op), 1322 op, 1323 opli)); 1324 1325 switch (op) { 1326 1327 case ESIS_OPTION_ES_CONF_TIME: 1328 if (opli == 2) { 1329 ND_TCHECK2(*pptr, 2); 1330 ND_PRINT((ndo, "%us", EXTRACT_16BITS(tptr))); 1331 } else 1332 ND_PRINT((ndo, "(bad length)")); 1333 break; 1334 1335 case ESIS_OPTION_PROTOCOLS: 1336 while (opli>0) { 1337 ND_TCHECK(*tptr); 1338 ND_PRINT((ndo, "%s (0x%02x)", 1339 tok2str(nlpid_values, 1340 "unknown", 1341 *tptr), 1342 *tptr)); 1343 if (opli>1) /* further NPLIDs ? - put comma */ 1344 ND_PRINT((ndo, ", ")); 1345 tptr++; 1346 opli--; 1347 } 1348 break; 1349 1350 /* 1351 * FIXME those are the defined Options that lack a decoder 1352 * you are welcome to contribute code ;-) 1353 */ 1354 1355 case ESIS_OPTION_QOS_MAINTENANCE: 1356 case ESIS_OPTION_SECURITY: 1357 case ESIS_OPTION_PRIORITY: 1358 case ESIS_OPTION_ADDRESS_MASK: 1359 case ESIS_OPTION_SNPA_MASK: 1360 1361 default: 1362 print_unknown_data(ndo, tptr, "\n\t ", opli); 1363 break; 1364 } 1365 if (ndo->ndo_vflag > 1) 1366 print_unknown_data(ndo, pptr, "\n\t ", opli); 1367 pptr += opli; 1368 } 1369trunc: 1370 ND_PRINT((ndo, "[|esis]")); 1371} 1372 1373static void 1374isis_print_mcid(netdissect_options *ndo, 1375 const struct isis_spb_mcid *mcid) 1376{ 1377 int i; 1378 1379 ND_TCHECK(*mcid); 1380 ND_PRINT((ndo, "ID: %d, Name: ", mcid->format_id)); 1381 1382 if (fn_printzp(ndo, mcid->name, 32, ndo->ndo_snapend)) 1383 goto trunc; 1384 1385 ND_PRINT((ndo, "\n\t Lvl: %d", EXTRACT_16BITS(mcid->revision_lvl))); 1386 1387 ND_PRINT((ndo, ", Digest: ")); 1388 1389 for(i=0;i<16;i++) 1390 ND_PRINT((ndo, "%.2x ", mcid->digest[i])); 1391 1392trunc: 1393 ND_PRINT((ndo, "%s", tstr)); 1394} 1395 1396static int 1397isis_print_mt_port_cap_subtlv(netdissect_options *ndo, 1398 const uint8_t *tptr, int len) 1399{ 1400 int stlv_type, stlv_len; 1401 const struct isis_subtlv_spb_mcid *subtlv_spb_mcid; 1402 int i; 1403 1404 while (len > 2) 1405 { 1406 ND_TCHECK2(*tptr, 2); 1407 stlv_type = *(tptr++); 1408 stlv_len = *(tptr++); 1409 1410 /* first lets see if we know the subTLVs name*/ 1411 ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u", 1412 tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type), 1413 stlv_type, 1414 stlv_len)); 1415 1416 /*len -= TLV_TYPE_LEN_OFFSET;*/ 1417 len = len -2; 1418 1419 /* Make sure the subTLV fits within the space left */ 1420 if (len < stlv_len) 1421 goto trunc; 1422 /* Make sure the entire subTLV is in the captured data */ 1423 ND_TCHECK2(*(tptr), stlv_len); 1424 1425 switch (stlv_type) 1426 { 1427 case ISIS_SUBTLV_SPB_MCID: 1428 { 1429 if (stlv_len < ISIS_SUBTLV_SPB_MCID_MIN_LEN) 1430 goto trunc; 1431 1432 subtlv_spb_mcid = (const struct isis_subtlv_spb_mcid *)tptr; 1433 1434 ND_PRINT((ndo, "\n\t MCID: ")); 1435 isis_print_mcid(ndo, &(subtlv_spb_mcid->mcid)); 1436 1437 /*tptr += SPB_MCID_MIN_LEN; 1438 len -= SPB_MCID_MIN_LEN; */ 1439 1440 ND_PRINT((ndo, "\n\t AUX-MCID: ")); 1441 isis_print_mcid(ndo, &(subtlv_spb_mcid->aux_mcid)); 1442 1443 /*tptr += SPB_MCID_MIN_LEN; 1444 len -= SPB_MCID_MIN_LEN; */ 1445 tptr = tptr + ISIS_SUBTLV_SPB_MCID_MIN_LEN; 1446 len = len - ISIS_SUBTLV_SPB_MCID_MIN_LEN; 1447 stlv_len = stlv_len - ISIS_SUBTLV_SPB_MCID_MIN_LEN; 1448 1449 break; 1450 } 1451 1452 case ISIS_SUBTLV_SPB_DIGEST: 1453 { 1454 if (stlv_len < ISIS_SUBTLV_SPB_DIGEST_MIN_LEN) 1455 goto trunc; 1456 1457 ND_PRINT((ndo, "\n\t RES: %d V: %d A: %d D: %d", 1458 (*(tptr) >> 5), (((*tptr)>> 4) & 0x01), 1459 ((*(tptr) >> 2) & 0x03), ((*tptr) & 0x03))); 1460 1461 tptr++; 1462 1463 ND_PRINT((ndo, "\n\t Digest: ")); 1464 1465 for(i=1;i<=8; i++) 1466 { 1467 ND_PRINT((ndo, "%08x ", EXTRACT_32BITS(tptr))); 1468 if (i%4 == 0 && i != 8) 1469 ND_PRINT((ndo, "\n\t ")); 1470 tptr = tptr + 4; 1471 } 1472 1473 len = len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN; 1474 stlv_len = stlv_len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN; 1475 1476 break; 1477 } 1478 1479 case ISIS_SUBTLV_SPB_BVID: 1480 { 1481 while (stlv_len >= ISIS_SUBTLV_SPB_BVID_MIN_LEN) 1482 { 1483 ND_PRINT((ndo, "\n\t ECT: %08x", 1484 EXTRACT_32BITS(tptr))); 1485 1486 tptr = tptr+4; 1487 1488 ND_PRINT((ndo, " BVID: %d, U:%01x M:%01x ", 1489 (EXTRACT_16BITS (tptr) >> 4) , 1490 (EXTRACT_16BITS (tptr) >> 3) & 0x01, 1491 (EXTRACT_16BITS (tptr) >> 2) & 0x01)); 1492 1493 tptr = tptr + 2; 1494 len = len - ISIS_SUBTLV_SPB_BVID_MIN_LEN; 1495 stlv_len = stlv_len - ISIS_SUBTLV_SPB_BVID_MIN_LEN; 1496 } 1497 1498 break; 1499 } 1500 1501 default: 1502 break; 1503 } 1504 tptr += stlv_len; 1505 len -= stlv_len; 1506 } 1507 1508 return 0; 1509 1510 trunc: 1511 ND_PRINT((ndo, "\n\t\t")); 1512 ND_PRINT((ndo, "%s", tstr)); 1513 return(1); 1514} 1515 1516static int 1517isis_print_mt_capability_subtlv(netdissect_options *ndo, 1518 const uint8_t *tptr, int len) 1519{ 1520 int stlv_type, stlv_len, tmp; 1521 1522 while (len > 2) 1523 { 1524 ND_TCHECK2(*tptr, 2); 1525 stlv_type = *(tptr++); 1526 stlv_len = *(tptr++); 1527 1528 /* first lets see if we know the subTLVs name*/ 1529 ND_PRINT((ndo, "\n\t %s subTLV #%u, length: %u", 1530 tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type), 1531 stlv_type, 1532 stlv_len)); 1533 1534 len = len - 2; 1535 1536 /* Make sure the subTLV fits within the space left */ 1537 if (len < stlv_len) 1538 goto trunc; 1539 /* Make sure the entire subTLV is in the captured data */ 1540 ND_TCHECK2(*(tptr), stlv_len); 1541 1542 switch (stlv_type) 1543 { 1544 case ISIS_SUBTLV_SPB_INSTANCE: 1545 if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN) 1546 goto trunc; 1547 1548 ND_PRINT((ndo, "\n\t CIST Root-ID: %08x", EXTRACT_32BITS(tptr))); 1549 tptr = tptr+4; 1550 ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tptr))); 1551 tptr = tptr+4; 1552 ND_PRINT((ndo, ", Path Cost: %08x", EXTRACT_32BITS(tptr))); 1553 tptr = tptr+4; 1554 ND_PRINT((ndo, ", Prio: %d", EXTRACT_16BITS(tptr))); 1555 tptr = tptr + 2; 1556 ND_PRINT((ndo, "\n\t RES: %d", 1557 EXTRACT_16BITS(tptr) >> 5)); 1558 ND_PRINT((ndo, ", V: %d", 1559 (EXTRACT_16BITS(tptr) >> 4) & 0x0001)); 1560 ND_PRINT((ndo, ", SPSource-ID: %d", 1561 (EXTRACT_32BITS(tptr) & 0x000fffff))); 1562 tptr = tptr+4; 1563 ND_PRINT((ndo, ", No of Trees: %x", *(tptr))); 1564 1565 tmp = *(tptr++); 1566 1567 len = len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN; 1568 stlv_len = stlv_len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN; 1569 1570 while (tmp) 1571 { 1572 if (stlv_len < ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN) 1573 goto trunc; 1574 1575 ND_PRINT((ndo, "\n\t U:%d, M:%d, A:%d, RES:%d", 1576 *(tptr) >> 7, (*(tptr) >> 6) & 0x01, 1577 (*(tptr) >> 5) & 0x01, (*(tptr) & 0x1f))); 1578 1579 tptr++; 1580 1581 ND_PRINT((ndo, ", ECT: %08x", EXTRACT_32BITS(tptr))); 1582 1583 tptr = tptr + 4; 1584 1585 ND_PRINT((ndo, ", BVID: %d, SPVID: %d", 1586 (EXTRACT_24BITS(tptr) >> 12) & 0x000fff, 1587 EXTRACT_24BITS(tptr) & 0x000fff)); 1588 1589 tptr = tptr + 3; 1590 len = len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN; 1591 stlv_len = stlv_len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN; 1592 tmp--; 1593 } 1594 1595 break; 1596 1597 case ISIS_SUBTLV_SPBM_SI: 1598 if (stlv_len < 8) 1599 goto trunc; 1600 1601 ND_PRINT((ndo, "\n\t BMAC: %08x", EXTRACT_32BITS(tptr))); 1602 tptr = tptr+4; 1603 ND_PRINT((ndo, "%04x", EXTRACT_16BITS(tptr))); 1604 tptr = tptr+2; 1605 1606 ND_PRINT((ndo, ", RES: %d, VID: %d", EXTRACT_16BITS(tptr) >> 12, 1607 (EXTRACT_16BITS(tptr)) & 0x0fff)); 1608 1609 tptr = tptr+2; 1610 len = len - 8; 1611 stlv_len = stlv_len - 8; 1612 1613 while (stlv_len >= 4) { 1614 ND_TCHECK2(*tptr, 4); 1615 ND_PRINT((ndo, "\n\t T: %d, R: %d, RES: %d, ISID: %d", 1616 (EXTRACT_32BITS(tptr) >> 31), 1617 (EXTRACT_32BITS(tptr) >> 30) & 0x01, 1618 (EXTRACT_32BITS(tptr) >> 24) & 0x03f, 1619 (EXTRACT_32BITS(tptr)) & 0x0ffffff)); 1620 1621 tptr = tptr + 4; 1622 len = len - 4; 1623 stlv_len = stlv_len - 4; 1624 } 1625 1626 break; 1627 1628 default: 1629 break; 1630 } 1631 tptr += stlv_len; 1632 len -= stlv_len; 1633 } 1634 return 0; 1635 1636 trunc: 1637 ND_PRINT((ndo, "\n\t\t")); 1638 ND_PRINT((ndo, "%s", tstr)); 1639 return(1); 1640} 1641 1642/* shared routine for printing system, node and lsp-ids */ 1643static char * 1644isis_print_id(const uint8_t *cp, int id_len) 1645{ 1646 int i; 1647 static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")]; 1648 char *pos = id; 1649 int sysid_len; 1650 1651 sysid_len = SYSTEM_ID_LEN; 1652 if (sysid_len > id_len) 1653 sysid_len = id_len; 1654 for (i = 1; i <= sysid_len; i++) { 1655 snprintf(pos, sizeof(id) - (pos - id), "%02x", *cp++); 1656 pos += strlen(pos); 1657 if (i == 2 || i == 4) 1658 *pos++ = '.'; 1659 } 1660 if (id_len >= NODE_ID_LEN) { 1661 snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++); 1662 pos += strlen(pos); 1663 } 1664 if (id_len == LSP_ID_LEN) 1665 snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp); 1666 return (id); 1667} 1668 1669/* print the 4-byte metric block which is common found in the old-style TLVs */ 1670static int 1671isis_print_metric_block(netdissect_options *ndo, 1672 const struct isis_metric_block *isis_metric_block) 1673{ 1674 ND_PRINT((ndo, ", Default Metric: %d, %s", 1675 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default), 1676 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal")); 1677 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay)) 1678 ND_PRINT((ndo, "\n\t\t Delay Metric: %d, %s", 1679 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay), 1680 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal")); 1681 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense)) 1682 ND_PRINT((ndo, "\n\t\t Expense Metric: %d, %s", 1683 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense), 1684 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal")); 1685 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error)) 1686 ND_PRINT((ndo, "\n\t\t Error Metric: %d, %s", 1687 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error), 1688 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal")); 1689 1690 return(1); /* everything is ok */ 1691} 1692 1693static int 1694isis_print_tlv_ip_reach(netdissect_options *ndo, 1695 const uint8_t *cp, const char *ident, int length) 1696{ 1697 int prefix_len; 1698 const struct isis_tlv_ip_reach *tlv_ip_reach; 1699 1700 tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp; 1701 1702 while (length > 0) { 1703 if ((size_t)length < sizeof(*tlv_ip_reach)) { 1704 ND_PRINT((ndo, "short IPv4 Reachability (%d vs %lu)", 1705 length, 1706 (unsigned long)sizeof(*tlv_ip_reach))); 1707 return (0); 1708 } 1709 1710 if (!ND_TTEST(*tlv_ip_reach)) 1711 return (0); 1712 1713 prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask)); 1714 1715 if (prefix_len == -1) 1716 ND_PRINT((ndo, "%sIPv4 prefix: %s mask %s", 1717 ident, 1718 ipaddr_string(ndo, (tlv_ip_reach->prefix)), 1719 ipaddr_string(ndo, (tlv_ip_reach->mask)))); 1720 else 1721 ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u", 1722 ident, 1723 ipaddr_string(ndo, (tlv_ip_reach->prefix)), 1724 prefix_len)); 1725 1726 ND_PRINT((ndo, ", Distribution: %s, Metric: %u, %s", 1727 ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up", 1728 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default), 1729 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal")); 1730 1731 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay)) 1732 ND_PRINT((ndo, "%s Delay Metric: %u, %s", 1733 ident, 1734 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay), 1735 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal")); 1736 1737 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense)) 1738 ND_PRINT((ndo, "%s Expense Metric: %u, %s", 1739 ident, 1740 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense), 1741 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal")); 1742 1743 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error)) 1744 ND_PRINT((ndo, "%s Error Metric: %u, %s", 1745 ident, 1746 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error), 1747 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal")); 1748 1749 length -= sizeof(struct isis_tlv_ip_reach); 1750 tlv_ip_reach++; 1751 } 1752 return (1); 1753} 1754 1755/* 1756 * this is the common IP-REACH subTLV decoder it is called 1757 * from various EXTD-IP REACH TLVs (135,235,236,237) 1758 */ 1759 1760static int 1761isis_print_ip_reach_subtlv(netdissect_options *ndo, 1762 const uint8_t *tptr, int subt, int subl, 1763 const char *ident) 1764{ 1765 /* first lets see if we know the subTLVs name*/ 1766 ND_PRINT((ndo, "%s%s subTLV #%u, length: %u", 1767 ident, tok2str(isis_ext_ip_reach_subtlv_values, "unknown", subt), 1768 subt, subl)); 1769 1770 ND_TCHECK2(*tptr,subl); 1771 1772 switch(subt) { 1773 case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */ 1774 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32: 1775 while (subl >= 4) { 1776 ND_PRINT((ndo, ", 0x%08x (=%u)", 1777 EXTRACT_32BITS(tptr), 1778 EXTRACT_32BITS(tptr))); 1779 tptr+=4; 1780 subl-=4; 1781 } 1782 break; 1783 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64: 1784 while (subl >= 8) { 1785 ND_PRINT((ndo, ", 0x%08x%08x", 1786 EXTRACT_32BITS(tptr), 1787 EXTRACT_32BITS(tptr+4))); 1788 tptr+=8; 1789 subl-=8; 1790 } 1791 break; 1792 default: 1793 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl)) 1794 return(0); 1795 break; 1796 } 1797 return(1); 1798 1799trunc: 1800 ND_PRINT((ndo, "%s", ident)); 1801 ND_PRINT((ndo, "%s", tstr)); 1802 return(0); 1803} 1804 1805/* 1806 * this is the common IS-REACH subTLV decoder it is called 1807 * from isis_print_ext_is_reach() 1808 */ 1809 1810static int 1811isis_print_is_reach_subtlv(netdissect_options *ndo, 1812 const uint8_t *tptr, u_int subt, u_int subl, 1813 const char *ident) 1814{ 1815 u_int te_class,priority_level,gmpls_switch_cap; 1816 union { /* int to float conversion buffer for several subTLVs */ 1817 float f; 1818 uint32_t i; 1819 } bw; 1820 1821 /* first lets see if we know the subTLVs name*/ 1822 ND_PRINT((ndo, "%s%s subTLV #%u, length: %u", 1823 ident, tok2str(isis_ext_is_reach_subtlv_values, "unknown", subt), 1824 subt, subl)); 1825 1826 ND_TCHECK2(*tptr, subl); 1827 1828 switch(subt) { 1829 case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP: 1830 case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID: 1831 case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID: 1832 if (subl >= 4) { 1833 ND_PRINT((ndo, ", 0x%08x", EXTRACT_32BITS(tptr))); 1834 if (subl == 8) /* rfc4205 */ 1835 ND_PRINT((ndo, ", 0x%08x", EXTRACT_32BITS(tptr+4))); 1836 } 1837 break; 1838 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR: 1839 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR: 1840 if (subl >= sizeof(struct in_addr)) 1841 ND_PRINT((ndo, ", %s", ipaddr_string(ndo, tptr))); 1842 break; 1843 case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW : 1844 case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW: 1845 if (subl >= 4) { 1846 bw.i = EXTRACT_32BITS(tptr); 1847 ND_PRINT((ndo, ", %.3f Mbps", bw.f * 8 / 1000000)); 1848 } 1849 break; 1850 case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW : 1851 if (subl >= 32) { 1852 for (te_class = 0; te_class < 8; te_class++) { 1853 bw.i = EXTRACT_32BITS(tptr); 1854 ND_PRINT((ndo, "%s TE-Class %u: %.3f Mbps", 1855 ident, 1856 te_class, 1857 bw.f * 8 / 1000000)); 1858 tptr+=4; 1859 } 1860 } 1861 break; 1862 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */ 1863 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD: 1864 if (subl == 0) 1865 break; 1866 ND_PRINT((ndo, "%sBandwidth Constraints Model ID: %s (%u)", 1867 ident, 1868 tok2str(diffserv_te_bc_values, "unknown", *tptr), 1869 *tptr)); 1870 tptr++; 1871 /* decode BCs until the subTLV ends */ 1872 for (te_class = 0; te_class < (subl-1)/4; te_class++) { 1873 bw.i = EXTRACT_32BITS(tptr); 1874 ND_PRINT((ndo, "%s Bandwidth constraint CT%u: %.3f Mbps", 1875 ident, 1876 te_class, 1877 bw.f * 8 / 1000000)); 1878 tptr+=4; 1879 } 1880 break; 1881 case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC: 1882 if (subl >= 3) 1883 ND_PRINT((ndo, ", %u", EXTRACT_24BITS(tptr))); 1884 break; 1885 case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE: 1886 if (subl == 2) { 1887 ND_PRINT((ndo, ", [ %s ] (0x%04x)", 1888 bittok2str(isis_subtlv_link_attribute_values, 1889 "Unknown", 1890 EXTRACT_16BITS(tptr)), 1891 EXTRACT_16BITS(tptr))); 1892 } 1893 break; 1894 case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE: 1895 if (subl >= 2) { 1896 ND_PRINT((ndo, ", %s, Priority %u", 1897 bittok2str(gmpls_link_prot_values, "none", *tptr), 1898 *(tptr+1))); 1899 } 1900 break; 1901 case ISIS_SUBTLV_SPB_METRIC: 1902 if (subl >= 6) { 1903 ND_PRINT((ndo, ", LM: %u", EXTRACT_24BITS(tptr))); 1904 tptr=tptr+3; 1905 ND_PRINT((ndo, ", P: %u", *(tptr))); 1906 tptr++; 1907 ND_PRINT((ndo, ", P-ID: %u", EXTRACT_16BITS(tptr))); 1908 } 1909 break; 1910 case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR: 1911 if (subl >= 36) { 1912 gmpls_switch_cap = *tptr; 1913 ND_PRINT((ndo, "%s Interface Switching Capability:%s", 1914 ident, 1915 tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap))); 1916 ND_PRINT((ndo, ", LSP Encoding: %s", 1917 tok2str(gmpls_encoding_values, "Unknown", *(tptr + 1)))); 1918 tptr+=4; 1919 ND_PRINT((ndo, "%s Max LSP Bandwidth:", ident)); 1920 for (priority_level = 0; priority_level < 8; priority_level++) { 1921 bw.i = EXTRACT_32BITS(tptr); 1922 ND_PRINT((ndo, "%s priority level %d: %.3f Mbps", 1923 ident, 1924 priority_level, 1925 bw.f * 8 / 1000000)); 1926 tptr+=4; 1927 } 1928 subl-=36; 1929 switch (gmpls_switch_cap) { 1930 case GMPLS_PSC1: 1931 case GMPLS_PSC2: 1932 case GMPLS_PSC3: 1933 case GMPLS_PSC4: 1934 if (subl < 6) 1935 break; 1936 bw.i = EXTRACT_32BITS(tptr); 1937 ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000)); 1938 ND_PRINT((ndo, "%s Interface MTU: %u", ident, EXTRACT_16BITS(tptr + 4))); 1939 break; 1940 case GMPLS_TSC: 1941 if (subl < 8) 1942 break; 1943 bw.i = EXTRACT_32BITS(tptr); 1944 ND_PRINT((ndo, "%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f * 8 / 1000000)); 1945 ND_PRINT((ndo, "%s Indication %s", ident, 1946 tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", *(tptr + 4)))); 1947 break; 1948 default: 1949 /* there is some optional stuff left to decode but this is as of yet 1950 not specified so just lets hexdump what is left */ 1951 if(subl>0){ 1952 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl)) 1953 return(0); 1954 } 1955 } 1956 } 1957 break; 1958 default: 1959 if (!print_unknown_data(ndo, tptr, "\n\t\t ", subl)) 1960 return(0); 1961 break; 1962 } 1963 return(1); 1964 1965trunc: 1966 return(0); 1967} 1968 1969/* 1970 * this is the common IS-REACH decoder it is called 1971 * from various EXTD-IS REACH style TLVs (22,24,222) 1972 */ 1973 1974static int 1975isis_print_ext_is_reach(netdissect_options *ndo, 1976 const uint8_t *tptr, const char *ident, int tlv_type) 1977{ 1978 char ident_buffer[20]; 1979 int subtlv_type,subtlv_len,subtlv_sum_len; 1980 int proc_bytes = 0; /* how many bytes did we process ? */ 1981 1982 if (!ND_TTEST2(*tptr, NODE_ID_LEN)) 1983 return(0); 1984 1985 ND_PRINT((ndo, "%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN))); 1986 tptr+=(NODE_ID_LEN); 1987 1988 if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */ 1989 if (!ND_TTEST2(*tptr, 3)) /* and is therefore skipped */ 1990 return(0); 1991 ND_PRINT((ndo, ", Metric: %d", EXTRACT_24BITS(tptr))); 1992 tptr+=3; 1993 } 1994 1995 if (!ND_TTEST2(*tptr, 1)) 1996 return(0); 1997 subtlv_sum_len=*(tptr++); /* read out subTLV length */ 1998 proc_bytes=NODE_ID_LEN+3+1; 1999 ND_PRINT((ndo, ", %ssub-TLVs present",subtlv_sum_len ? "" : "no ")); 2000 if (subtlv_sum_len) { 2001 ND_PRINT((ndo, " (%u)", subtlv_sum_len)); 2002 while (subtlv_sum_len>0) { 2003 if (!ND_TTEST2(*tptr,2)) 2004 return(0); 2005 subtlv_type=*(tptr++); 2006 subtlv_len=*(tptr++); 2007 /* prepend the indent string */ 2008 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); 2009 if (!isis_print_is_reach_subtlv(ndo, tptr, subtlv_type, subtlv_len, ident_buffer)) 2010 return(0); 2011 tptr+=subtlv_len; 2012 subtlv_sum_len-=(subtlv_len+2); 2013 proc_bytes+=(subtlv_len+2); 2014 } 2015 } 2016 return(proc_bytes); 2017} 2018 2019/* 2020 * this is the common Multi Topology ID decoder 2021 * it is called from various MT-TLVs (222,229,235,237) 2022 */ 2023 2024static int 2025isis_print_mtid(netdissect_options *ndo, 2026 const uint8_t *tptr, const char *ident) 2027{ 2028 if (!ND_TTEST2(*tptr, 2)) 2029 return(0); 2030 2031 ND_PRINT((ndo, "%s%s", 2032 ident, 2033 tok2str(isis_mt_values, 2034 "Reserved for IETF Consensus", 2035 ISIS_MASK_MTID(EXTRACT_16BITS(tptr))))); 2036 2037 ND_PRINT((ndo, " Topology (0x%03x), Flags: [%s]", 2038 ISIS_MASK_MTID(EXTRACT_16BITS(tptr)), 2039 bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_16BITS(tptr))))); 2040 2041 return(2); 2042} 2043 2044/* 2045 * this is the common extended IP reach decoder 2046 * it is called from TLVs (135,235,236,237) 2047 * we process the TLV and optional subTLVs and return 2048 * the amount of processed bytes 2049 */ 2050 2051static int 2052isis_print_extd_ip_reach(netdissect_options *ndo, 2053 const uint8_t *tptr, const char *ident, uint16_t afi) 2054{ 2055 char ident_buffer[20]; 2056 uint8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */ 2057 u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen; 2058 2059 if (!ND_TTEST2(*tptr, 4)) 2060 return (0); 2061 metric = EXTRACT_32BITS(tptr); 2062 processed=4; 2063 tptr+=4; 2064 2065 if (afi == AF_INET) { 2066 if (!ND_TTEST2(*tptr, 1)) /* fetch status byte */ 2067 return (0); 2068 status_byte=*(tptr++); 2069 bit_length = status_byte&0x3f; 2070 if (bit_length > 32) { 2071 ND_PRINT((ndo, "%sIPv4 prefix: bad bit length %u", 2072 ident, 2073 bit_length)); 2074 return (0); 2075 } 2076 processed++; 2077 } else if (afi == AF_INET6) { 2078 if (!ND_TTEST2(*tptr, 2)) /* fetch status & prefix_len byte */ 2079 return (0); 2080 status_byte=*(tptr++); 2081 bit_length=*(tptr++); 2082 if (bit_length > 128) { 2083 ND_PRINT((ndo, "%sIPv6 prefix: bad bit length %u", 2084 ident, 2085 bit_length)); 2086 return (0); 2087 } 2088 processed+=2; 2089 } else 2090 return (0); /* somebody is fooling us */ 2091 2092 byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */ 2093 2094 if (!ND_TTEST2(*tptr, byte_length)) 2095 return (0); 2096 memset(prefix, 0, sizeof prefix); /* clear the copy buffer */ 2097 memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */ 2098 tptr+=byte_length; 2099 processed+=byte_length; 2100 2101 if (afi == AF_INET) 2102 ND_PRINT((ndo, "%sIPv4 prefix: %15s/%u", 2103 ident, 2104 ipaddr_string(ndo, prefix), 2105 bit_length)); 2106 else if (afi == AF_INET6) 2107 ND_PRINT((ndo, "%sIPv6 prefix: %s/%u", 2108 ident, 2109 ip6addr_string(ndo, prefix), 2110 bit_length)); 2111 2112 ND_PRINT((ndo, ", Distribution: %s, Metric: %u", 2113 ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up", 2114 metric)); 2115 2116 if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) 2117 ND_PRINT((ndo, ", sub-TLVs present")); 2118 else if (afi == AF_INET6) 2119 ND_PRINT((ndo, ", %s%s", 2120 ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal", 2121 ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : "")); 2122 2123 if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) 2124 || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte)) 2125 ) { 2126 /* assume that one prefix can hold more 2127 than one subTLV - therefore the first byte must reflect 2128 the aggregate bytecount of the subTLVs for this prefix 2129 */ 2130 if (!ND_TTEST2(*tptr, 1)) 2131 return (0); 2132 sublen=*(tptr++); 2133 processed+=sublen+1; 2134 ND_PRINT((ndo, " (%u)", sublen)); /* print out subTLV length */ 2135 2136 while (sublen>0) { 2137 if (!ND_TTEST2(*tptr,2)) 2138 return (0); 2139 subtlvtype=*(tptr++); 2140 subtlvlen=*(tptr++); 2141 /* prepend the indent string */ 2142 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); 2143 if (!isis_print_ip_reach_subtlv(ndo, tptr, subtlvtype, subtlvlen, ident_buffer)) 2144 return(0); 2145 tptr+=subtlvlen; 2146 sublen-=(subtlvlen+2); 2147 } 2148 } 2149 return (processed); 2150} 2151 2152/* 2153 * Clear checksum and lifetime prior to signature verification. 2154 */ 2155static void 2156isis_clear_checksum_lifetime(void *header) 2157{ 2158 struct isis_lsp_header *header_lsp = (struct isis_lsp_header *) header; 2159 2160 header_lsp->checksum[0] = 0; 2161 header_lsp->checksum[1] = 0; 2162 header_lsp->remaining_lifetime[0] = 0; 2163 header_lsp->remaining_lifetime[1] = 0; 2164} 2165 2166/* 2167 * isis_print 2168 * Decode IS-IS packets. Return 0 on error. 2169 */ 2170 2171static int 2172isis_print(netdissect_options *ndo, 2173 const uint8_t *p, u_int length) 2174{ 2175 const struct isis_common_header *isis_header; 2176 2177 const struct isis_iih_lan_header *header_iih_lan; 2178 const struct isis_iih_ptp_header *header_iih_ptp; 2179 const struct isis_lsp_header *header_lsp; 2180 const struct isis_csnp_header *header_csnp; 2181 const struct isis_psnp_header *header_psnp; 2182 2183 const struct isis_tlv_lsp *tlv_lsp; 2184 const struct isis_tlv_ptp_adj *tlv_ptp_adj; 2185 const struct isis_tlv_is_reach *tlv_is_reach; 2186 const struct isis_tlv_es_reach *tlv_es_reach; 2187 2188 uint8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len; 2189 uint8_t ext_is_len, ext_ip_len, mt_len; 2190 const uint8_t *optr, *pptr, *tptr; 2191 u_short packet_len,pdu_len, key_id; 2192 u_int i,vendor_id; 2193 int sigcheck; 2194 2195 packet_len=length; 2196 optr = p; /* initialize the _o_riginal pointer to the packet start - 2197 need it for parsing the checksum TLV and authentication 2198 TLV verification */ 2199 isis_header = (const struct isis_common_header *)p; 2200 ND_TCHECK(*isis_header); 2201 if (length < ISIS_COMMON_HEADER_SIZE) 2202 goto trunc; 2203 pptr = p+(ISIS_COMMON_HEADER_SIZE); 2204 header_iih_lan = (const struct isis_iih_lan_header *)pptr; 2205 header_iih_ptp = (const struct isis_iih_ptp_header *)pptr; 2206 header_lsp = (const struct isis_lsp_header *)pptr; 2207 header_csnp = (const struct isis_csnp_header *)pptr; 2208 header_psnp = (const struct isis_psnp_header *)pptr; 2209 2210 if (!ndo->ndo_eflag) 2211 ND_PRINT((ndo, "IS-IS")); 2212 2213 /* 2214 * Sanity checking of the header. 2215 */ 2216 2217 if (isis_header->version != ISIS_VERSION) { 2218 ND_PRINT((ndo, "version %d packet not supported", isis_header->version)); 2219 return (0); 2220 } 2221 2222 if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) { 2223 ND_PRINT((ndo, "system ID length of %d is not supported", 2224 isis_header->id_length)); 2225 return (0); 2226 } 2227 2228 if (isis_header->pdu_version != ISIS_VERSION) { 2229 ND_PRINT((ndo, "version %d packet not supported", isis_header->pdu_version)); 2230 return (0); 2231 } 2232 2233 if (length < isis_header->fixed_len) { 2234 ND_PRINT((ndo, "fixed header length %u > packet length %u", isis_header->fixed_len, length)); 2235 return (0); 2236 } 2237 2238 if (isis_header->fixed_len < ISIS_COMMON_HEADER_SIZE) { 2239 ND_PRINT((ndo, "fixed header length %u < minimum header size %u", isis_header->fixed_len, (u_int)ISIS_COMMON_HEADER_SIZE)); 2240 return (0); 2241 } 2242 2243 max_area = isis_header->max_area; 2244 switch(max_area) { 2245 case 0: 2246 max_area = 3; /* silly shit */ 2247 break; 2248 case 255: 2249 ND_PRINT((ndo, "bad packet -- 255 areas")); 2250 return (0); 2251 default: 2252 break; 2253 } 2254 2255 id_length = isis_header->id_length; 2256 switch(id_length) { 2257 case 0: 2258 id_length = 6; /* silly shit again */ 2259 break; 2260 case 1: /* 1-8 are valid sys-ID lenghts */ 2261 case 2: 2262 case 3: 2263 case 4: 2264 case 5: 2265 case 6: 2266 case 7: 2267 case 8: 2268 break; 2269 case 255: 2270 id_length = 0; /* entirely useless */ 2271 break; 2272 default: 2273 break; 2274 } 2275 2276 /* toss any non 6-byte sys-ID len PDUs */ 2277 if (id_length != 6 ) { 2278 ND_PRINT((ndo, "bad packet -- illegal sys-ID length (%u)", id_length)); 2279 return (0); 2280 } 2281 2282 pdu_type=isis_header->pdu_type; 2283 2284 /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/ 2285 if (ndo->ndo_vflag == 0) { 2286 ND_PRINT((ndo, "%s%s", 2287 ndo->ndo_eflag ? "" : ", ", 2288 tok2str(isis_pdu_values, "unknown PDU-Type %u", pdu_type))); 2289 } else { 2290 /* ok they seem to want to know everything - lets fully decode it */ 2291 ND_PRINT((ndo, "%slength %u", ndo->ndo_eflag ? "" : ", ", length)); 2292 2293 ND_PRINT((ndo, "\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)", 2294 tok2str(isis_pdu_values, 2295 "unknown, type %u", 2296 pdu_type), 2297 isis_header->fixed_len, 2298 isis_header->version, 2299 isis_header->pdu_version, 2300 id_length, 2301 isis_header->id_length, 2302 max_area, 2303 isis_header->max_area)); 2304 2305 if (ndo->ndo_vflag > 1) { 2306 if (!print_unknown_data(ndo, optr, "\n\t", 8)) /* provide the _o_riginal pointer */ 2307 return (0); /* for optionally debugging the common header */ 2308 } 2309 } 2310 2311 switch (pdu_type) { 2312 2313 case ISIS_PDU_L1_LAN_IIH: 2314 case ISIS_PDU_L2_LAN_IIH: 2315 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) { 2316 ND_PRINT((ndo, ", bogus fixed header length %u should be %lu", 2317 isis_header->fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE))); 2318 return (0); 2319 } 2320 ND_TCHECK(*header_iih_lan); 2321 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE) 2322 goto trunc; 2323 if (ndo->ndo_vflag == 0) { 2324 ND_PRINT((ndo, ", src-id %s", 2325 isis_print_id(header_iih_lan->source_id, SYSTEM_ID_LEN))); 2326 ND_PRINT((ndo, ", lan-id %s, prio %u", 2327 isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN), 2328 header_iih_lan->priority)); 2329 ND_PRINT((ndo, ", length %u", length)); 2330 return (1); 2331 } 2332 pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len); 2333 if (packet_len>pdu_len) { 2334 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2335 length=pdu_len; 2336 } 2337 2338 ND_PRINT((ndo, "\n\t source-id: %s, holding time: %us, Flags: [%s]", 2339 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN), 2340 EXTRACT_16BITS(header_iih_lan->holding_time), 2341 tok2str(isis_iih_circuit_type_values, 2342 "unknown circuit type 0x%02x", 2343 header_iih_lan->circuit_type))); 2344 2345 ND_PRINT((ndo, "\n\t lan-id: %s, Priority: %u, PDU length: %u", 2346 isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN), 2347 (header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK, 2348 pdu_len)); 2349 2350 if (ndo->ndo_vflag > 1) { 2351 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_LAN_HEADER_SIZE)) 2352 return (0); 2353 } 2354 2355 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); 2356 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); 2357 break; 2358 2359 case ISIS_PDU_PTP_IIH: 2360 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) { 2361 ND_PRINT((ndo, ", bogus fixed header length %u should be %lu", 2362 isis_header->fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE))); 2363 return (0); 2364 } 2365 ND_TCHECK(*header_iih_ptp); 2366 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE) 2367 goto trunc; 2368 if (ndo->ndo_vflag == 0) { 2369 ND_PRINT((ndo, ", src-id %s", isis_print_id(header_iih_ptp->source_id, SYSTEM_ID_LEN))); 2370 ND_PRINT((ndo, ", length %u", length)); 2371 return (1); 2372 } 2373 pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len); 2374 if (packet_len>pdu_len) { 2375 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2376 length=pdu_len; 2377 } 2378 2379 ND_PRINT((ndo, "\n\t source-id: %s, holding time: %us, Flags: [%s]", 2380 isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN), 2381 EXTRACT_16BITS(header_iih_ptp->holding_time), 2382 tok2str(isis_iih_circuit_type_values, 2383 "unknown circuit type 0x%02x", 2384 header_iih_ptp->circuit_type))); 2385 2386 ND_PRINT((ndo, "\n\t circuit-id: 0x%02x, PDU length: %u", 2387 header_iih_ptp->circuit_id, 2388 pdu_len)); 2389 2390 if (ndo->ndo_vflag > 1) { 2391 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_IIH_PTP_HEADER_SIZE)) 2392 return (0); 2393 } 2394 2395 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); 2396 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); 2397 break; 2398 2399 case ISIS_PDU_L1_LSP: 2400 case ISIS_PDU_L2_LSP: 2401 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) { 2402 ND_PRINT((ndo, ", bogus fixed header length %u should be %lu", 2403 isis_header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE)); 2404 return (0); 2405 } 2406 ND_TCHECK(*header_lsp); 2407 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE) 2408 goto trunc; 2409 if (ndo->ndo_vflag == 0) { 2410 ND_PRINT((ndo, ", lsp-id %s, seq 0x%08x, lifetime %5us", 2411 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), 2412 EXTRACT_32BITS(header_lsp->sequence_number), 2413 EXTRACT_16BITS(header_lsp->remaining_lifetime))); 2414 ND_PRINT((ndo, ", length %u", length)); 2415 return (1); 2416 } 2417 pdu_len=EXTRACT_16BITS(header_lsp->pdu_len); 2418 if (packet_len>pdu_len) { 2419 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2420 length=pdu_len; 2421 } 2422 2423 ND_PRINT((ndo, "\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x", 2424 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), 2425 EXTRACT_32BITS(header_lsp->sequence_number), 2426 EXTRACT_16BITS(header_lsp->remaining_lifetime), 2427 EXTRACT_16BITS(header_lsp->checksum))); 2428 2429 osi_print_cksum(ndo, (const uint8_t *)header_lsp->lsp_id, 2430 EXTRACT_16BITS(header_lsp->checksum), 2431 12, length-12); 2432 2433 ND_PRINT((ndo, ", PDU length: %u, Flags: [ %s", 2434 pdu_len, 2435 ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : "")); 2436 2437 if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) { 2438 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : "")); 2439 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : "")); 2440 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : "")); 2441 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : "")); 2442 ND_PRINT((ndo, "ATT bit set, ")); 2443 } 2444 ND_PRINT((ndo, "%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : "")); 2445 ND_PRINT((ndo, "%s ]", tok2str(isis_lsp_istype_values, "Unknown(0x%x)", 2446 ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock)))); 2447 2448 if (ndo->ndo_vflag > 1) { 2449 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_LSP_HEADER_SIZE)) 2450 return (0); 2451 } 2452 2453 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); 2454 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); 2455 break; 2456 2457 case ISIS_PDU_L1_CSNP: 2458 case ISIS_PDU_L2_CSNP: 2459 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) { 2460 ND_PRINT((ndo, ", bogus fixed header length %u should be %lu", 2461 isis_header->fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE))); 2462 return (0); 2463 } 2464 ND_TCHECK(*header_csnp); 2465 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE) 2466 goto trunc; 2467 if (ndo->ndo_vflag == 0) { 2468 ND_PRINT((ndo, ", src-id %s", isis_print_id(header_csnp->source_id, NODE_ID_LEN))); 2469 ND_PRINT((ndo, ", length %u", length)); 2470 return (1); 2471 } 2472 pdu_len=EXTRACT_16BITS(header_csnp->pdu_len); 2473 if (packet_len>pdu_len) { 2474 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2475 length=pdu_len; 2476 } 2477 2478 ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u", 2479 isis_print_id(header_csnp->source_id, NODE_ID_LEN), 2480 pdu_len)); 2481 ND_PRINT((ndo, "\n\t start lsp-id: %s", 2482 isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN))); 2483 ND_PRINT((ndo, "\n\t end lsp-id: %s", 2484 isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN))); 2485 2486 if (ndo->ndo_vflag > 1) { 2487 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_CSNP_HEADER_SIZE)) 2488 return (0); 2489 } 2490 2491 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); 2492 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); 2493 break; 2494 2495 case ISIS_PDU_L1_PSNP: 2496 case ISIS_PDU_L2_PSNP: 2497 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) { 2498 ND_PRINT((ndo, "- bogus fixed header length %u should be %lu", 2499 isis_header->fixed_len, (unsigned long)(ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE))); 2500 return (0); 2501 } 2502 ND_TCHECK(*header_psnp); 2503 if (length < ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE) 2504 goto trunc; 2505 if (ndo->ndo_vflag == 0) { 2506 ND_PRINT((ndo, ", src-id %s", isis_print_id(header_psnp->source_id, NODE_ID_LEN))); 2507 ND_PRINT((ndo, ", length %u", length)); 2508 return (1); 2509 } 2510 pdu_len=EXTRACT_16BITS(header_psnp->pdu_len); 2511 if (packet_len>pdu_len) { 2512 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2513 length=pdu_len; 2514 } 2515 2516 ND_PRINT((ndo, "\n\t source-id: %s, PDU length: %u", 2517 isis_print_id(header_psnp->source_id, NODE_ID_LEN), 2518 pdu_len)); 2519 2520 if (ndo->ndo_vflag > 1) { 2521 if (!print_unknown_data(ndo, pptr, "\n\t ", ISIS_PSNP_HEADER_SIZE)) 2522 return (0); 2523 } 2524 2525 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); 2526 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); 2527 break; 2528 2529 default: 2530 if (ndo->ndo_vflag == 0) { 2531 ND_PRINT((ndo, ", length %u", length)); 2532 return (1); 2533 } 2534 (void)print_unknown_data(ndo, pptr, "\n\t ", length); 2535 return (0); 2536 } 2537 2538 /* 2539 * Now print the TLV's. 2540 */ 2541 2542 while (packet_len > 0) { 2543 ND_TCHECK2(*pptr, 2); 2544 if (packet_len < 2) 2545 goto trunc; 2546 tlv_type = *pptr++; 2547 tlv_len = *pptr++; 2548 tmp =tlv_len; /* copy temporary len & pointer to packet data */ 2549 tptr = pptr; 2550 packet_len -= 2; 2551 2552 /* first lets see if we know the TLVs name*/ 2553 ND_PRINT((ndo, "\n\t %s TLV #%u, length: %u", 2554 tok2str(isis_tlv_values, 2555 "unknown", 2556 tlv_type), 2557 tlv_type, 2558 tlv_len)); 2559 2560 if (tlv_len == 0) /* something is invalid */ 2561 continue; 2562 2563 if (packet_len < tlv_len) 2564 goto trunc; 2565 2566 /* now check if we have a decoder otherwise do a hexdump at the end*/ 2567 switch (tlv_type) { 2568 case ISIS_TLV_AREA_ADDR: 2569 ND_TCHECK2(*tptr, 1); 2570 alen = *tptr++; 2571 while (tmp && alen < tmp) { 2572 ND_TCHECK2(*tptr, alen); 2573 ND_PRINT((ndo, "\n\t Area address (length: %u): %s", 2574 alen, 2575 isonsap_string(ndo, tptr, alen))); 2576 tptr += alen; 2577 tmp -= alen + 1; 2578 if (tmp==0) /* if this is the last area address do not attemt a boundary check */ 2579 break; 2580 ND_TCHECK2(*tptr, 1); 2581 alen = *tptr++; 2582 } 2583 break; 2584 case ISIS_TLV_ISNEIGH: 2585 while (tmp >= ETHER_ADDR_LEN) { 2586 ND_TCHECK2(*tptr, ETHER_ADDR_LEN); 2587 ND_PRINT((ndo, "\n\t SNPA: %s", isis_print_id(tptr, ETHER_ADDR_LEN))); 2588 tmp -= ETHER_ADDR_LEN; 2589 tptr += ETHER_ADDR_LEN; 2590 } 2591 break; 2592 2593 case ISIS_TLV_ISNEIGH_VARLEN: 2594 if (!ND_TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */ 2595 goto trunctlv; 2596 lan_alen = *tptr++; /* LAN address length */ 2597 if (lan_alen == 0) { 2598 ND_PRINT((ndo, "\n\t LAN address length 0 bytes (invalid)")); 2599 break; 2600 } 2601 tmp --; 2602 ND_PRINT((ndo, "\n\t LAN address length %u bytes ", lan_alen)); 2603 while (tmp >= lan_alen) { 2604 ND_TCHECK2(*tptr, lan_alen); 2605 ND_PRINT((ndo, "\n\t\tIS Neighbor: %s", isis_print_id(tptr, lan_alen))); 2606 tmp -= lan_alen; 2607 tptr +=lan_alen; 2608 } 2609 break; 2610 2611 case ISIS_TLV_PADDING: 2612 break; 2613 2614 case ISIS_TLV_MT_IS_REACH: 2615 mt_len = isis_print_mtid(ndo, tptr, "\n\t "); 2616 if (mt_len == 0) /* did something go wrong ? */ 2617 goto trunctlv; 2618 tptr+=mt_len; 2619 tmp-=mt_len; 2620 while (tmp >= 2+NODE_ID_LEN+3+1) { 2621 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type); 2622 if (ext_is_len == 0) /* did something go wrong ? */ 2623 goto trunctlv; 2624 2625 tmp-=ext_is_len; 2626 tptr+=ext_is_len; 2627 } 2628 break; 2629 2630 case ISIS_TLV_IS_ALIAS_ID: 2631 while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */ 2632 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type); 2633 if (ext_is_len == 0) /* did something go wrong ? */ 2634 goto trunctlv; 2635 tmp-=ext_is_len; 2636 tptr+=ext_is_len; 2637 } 2638 break; 2639 2640 case ISIS_TLV_EXT_IS_REACH: 2641 while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */ 2642 ext_is_len = isis_print_ext_is_reach(ndo, tptr, "\n\t ", tlv_type); 2643 if (ext_is_len == 0) /* did something go wrong ? */ 2644 goto trunctlv; 2645 tmp-=ext_is_len; 2646 tptr+=ext_is_len; 2647 } 2648 break; 2649 case ISIS_TLV_IS_REACH: 2650 ND_TCHECK2(*tptr,1); /* check if there is one byte left to read out the virtual flag */ 2651 ND_PRINT((ndo, "\n\t %s", 2652 tok2str(isis_is_reach_virtual_values, 2653 "bogus virtual flag 0x%02x", 2654 *tptr++))); 2655 tlv_is_reach = (const struct isis_tlv_is_reach *)tptr; 2656 while (tmp >= sizeof(struct isis_tlv_is_reach)) { 2657 ND_TCHECK(*tlv_is_reach); 2658 ND_PRINT((ndo, "\n\t IS Neighbor: %s", 2659 isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN))); 2660 isis_print_metric_block(ndo, &tlv_is_reach->isis_metric_block); 2661 tmp -= sizeof(struct isis_tlv_is_reach); 2662 tlv_is_reach++; 2663 } 2664 break; 2665 2666 case ISIS_TLV_ESNEIGH: 2667 tlv_es_reach = (const struct isis_tlv_es_reach *)tptr; 2668 while (tmp >= sizeof(struct isis_tlv_es_reach)) { 2669 ND_TCHECK(*tlv_es_reach); 2670 ND_PRINT((ndo, "\n\t ES Neighbor: %s", 2671 isis_print_id(tlv_es_reach->neighbor_sysid, SYSTEM_ID_LEN))); 2672 isis_print_metric_block(ndo, &tlv_es_reach->isis_metric_block); 2673 tmp -= sizeof(struct isis_tlv_es_reach); 2674 tlv_es_reach++; 2675 } 2676 break; 2677 2678 /* those two TLVs share the same format */ 2679 case ISIS_TLV_INT_IP_REACH: 2680 case ISIS_TLV_EXT_IP_REACH: 2681 if (!isis_print_tlv_ip_reach(ndo, pptr, "\n\t ", tlv_len)) 2682 return (1); 2683 break; 2684 2685 case ISIS_TLV_EXTD_IP_REACH: 2686 while (tmp>0) { 2687 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET); 2688 if (ext_ip_len == 0) /* did something go wrong ? */ 2689 goto trunctlv; 2690 tptr+=ext_ip_len; 2691 tmp-=ext_ip_len; 2692 } 2693 break; 2694 2695 case ISIS_TLV_MT_IP_REACH: 2696 mt_len = isis_print_mtid(ndo, tptr, "\n\t "); 2697 if (mt_len == 0) { /* did something go wrong ? */ 2698 goto trunctlv; 2699 } 2700 tptr+=mt_len; 2701 tmp-=mt_len; 2702 2703 while (tmp>0) { 2704 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET); 2705 if (ext_ip_len == 0) /* did something go wrong ? */ 2706 goto trunctlv; 2707 tptr+=ext_ip_len; 2708 tmp-=ext_ip_len; 2709 } 2710 break; 2711 2712 case ISIS_TLV_IP6_REACH: 2713 while (tmp>0) { 2714 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6); 2715 if (ext_ip_len == 0) /* did something go wrong ? */ 2716 goto trunctlv; 2717 tptr+=ext_ip_len; 2718 tmp-=ext_ip_len; 2719 } 2720 break; 2721 2722 case ISIS_TLV_MT_IP6_REACH: 2723 mt_len = isis_print_mtid(ndo, tptr, "\n\t "); 2724 if (mt_len == 0) { /* did something go wrong ? */ 2725 goto trunctlv; 2726 } 2727 tptr+=mt_len; 2728 tmp-=mt_len; 2729 2730 while (tmp>0) { 2731 ext_ip_len = isis_print_extd_ip_reach(ndo, tptr, "\n\t ", AF_INET6); 2732 if (ext_ip_len == 0) /* did something go wrong ? */ 2733 goto trunctlv; 2734 tptr+=ext_ip_len; 2735 tmp-=ext_ip_len; 2736 } 2737 break; 2738 2739 case ISIS_TLV_IP6ADDR: 2740 while (tmp>=sizeof(struct in6_addr)) { 2741 ND_TCHECK2(*tptr, sizeof(struct in6_addr)); 2742 2743 ND_PRINT((ndo, "\n\t IPv6 interface address: %s", 2744 ip6addr_string(ndo, tptr))); 2745 2746 tptr += sizeof(struct in6_addr); 2747 tmp -= sizeof(struct in6_addr); 2748 } 2749 break; 2750 case ISIS_TLV_AUTH: 2751 ND_TCHECK2(*tptr, 1); 2752 2753 ND_PRINT((ndo, "\n\t %s: ", 2754 tok2str(isis_subtlv_auth_values, 2755 "unknown Authentication type 0x%02x", 2756 *tptr))); 2757 2758 switch (*tptr) { 2759 case ISIS_SUBTLV_AUTH_SIMPLE: 2760 if (fn_printzp(ndo, tptr + 1, tlv_len - 1, ndo->ndo_snapend)) 2761 goto trunctlv; 2762 break; 2763 case ISIS_SUBTLV_AUTH_MD5: 2764 for(i=1;i<tlv_len;i++) { 2765 ND_TCHECK2(*(tptr + i), 1); 2766 ND_PRINT((ndo, "%02x", *(tptr + i))); 2767 } 2768 if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1) 2769 ND_PRINT((ndo, ", (invalid subTLV) ")); 2770 2771 sigcheck = signature_verify(ndo, optr, length, tptr + 1, 2772 isis_clear_checksum_lifetime, 2773 header_lsp); 2774 ND_PRINT((ndo, " (%s)", tok2str(signature_check_values, "Unknown", sigcheck))); 2775 2776 break; 2777 case ISIS_SUBTLV_AUTH_GENERIC: 2778 ND_TCHECK2(*(tptr + 1), 2); 2779 key_id = EXTRACT_16BITS((tptr+1)); 2780 ND_PRINT((ndo, "%u, password: ", key_id)); 2781 for(i=1 + sizeof(uint16_t);i<tlv_len;i++) { 2782 ND_TCHECK2(*(tptr + i), 1); 2783 ND_PRINT((ndo, "%02x", *(tptr + i))); 2784 } 2785 break; 2786 case ISIS_SUBTLV_AUTH_PRIVATE: 2787 default: 2788 if (!print_unknown_data(ndo, tptr + 1, "\n\t\t ", tlv_len - 1)) 2789 return(0); 2790 break; 2791 } 2792 break; 2793 2794 case ISIS_TLV_PTP_ADJ: 2795 tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr; 2796 if(tmp>=1) { 2797 ND_TCHECK2(*tptr, 1); 2798 ND_PRINT((ndo, "\n\t Adjacency State: %s (%u)", 2799 tok2str(isis_ptp_adjancey_values, "unknown", *tptr), 2800 *tptr)); 2801 tmp--; 2802 } 2803 if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) { 2804 ND_TCHECK(tlv_ptp_adj->extd_local_circuit_id); 2805 ND_PRINT((ndo, "\n\t Extended Local circuit-ID: 0x%08x", 2806 EXTRACT_32BITS(tlv_ptp_adj->extd_local_circuit_id))); 2807 tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id); 2808 } 2809 if(tmp>=SYSTEM_ID_LEN) { 2810 ND_TCHECK2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN); 2811 ND_PRINT((ndo, "\n\t Neighbor System-ID: %s", 2812 isis_print_id(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN))); 2813 tmp-=SYSTEM_ID_LEN; 2814 } 2815 if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) { 2816 ND_TCHECK(tlv_ptp_adj->neighbor_extd_local_circuit_id); 2817 ND_PRINT((ndo, "\n\t Neighbor Extended Local circuit-ID: 0x%08x", 2818 EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id))); 2819 } 2820 break; 2821 2822 case ISIS_TLV_PROTOCOLS: 2823 ND_PRINT((ndo, "\n\t NLPID(s): ")); 2824 while (tmp>0) { 2825 ND_TCHECK2(*(tptr), 1); 2826 ND_PRINT((ndo, "%s (0x%02x)", 2827 tok2str(nlpid_values, 2828 "unknown", 2829 *tptr), 2830 *tptr)); 2831 if (tmp>1) /* further NPLIDs ? - put comma */ 2832 ND_PRINT((ndo, ", ")); 2833 tptr++; 2834 tmp--; 2835 } 2836 break; 2837 2838 case ISIS_TLV_MT_PORT_CAP: 2839 { 2840 ND_TCHECK2(*(tptr), 2); 2841 2842 ND_PRINT((ndo, "\n\t RES: %d, MTID(s): %d", 2843 (EXTRACT_16BITS (tptr) >> 12), 2844 (EXTRACT_16BITS (tptr) & 0x0fff))); 2845 2846 tmp = tmp-2; 2847 tptr = tptr+2; 2848 2849 if (tmp) 2850 isis_print_mt_port_cap_subtlv(ndo, tptr, tmp); 2851 2852 break; 2853 } 2854 2855 case ISIS_TLV_MT_CAPABILITY: 2856 2857 ND_TCHECK2(*(tptr), 2); 2858 2859 ND_PRINT((ndo, "\n\t O: %d, RES: %d, MTID(s): %d", 2860 (EXTRACT_16BITS(tptr) >> 15) & 0x01, 2861 (EXTRACT_16BITS(tptr) >> 12) & 0x07, 2862 EXTRACT_16BITS(tptr) & 0x0fff)); 2863 2864 tmp = tmp-2; 2865 tptr = tptr+2; 2866 2867 if (tmp) 2868 isis_print_mt_capability_subtlv(ndo, tptr, tmp); 2869 2870 break; 2871 2872 case ISIS_TLV_TE_ROUTER_ID: 2873 ND_TCHECK2(*pptr, sizeof(struct in_addr)); 2874 ND_PRINT((ndo, "\n\t Traffic Engineering Router ID: %s", ipaddr_string(ndo, pptr))); 2875 break; 2876 2877 case ISIS_TLV_IPADDR: 2878 while (tmp>=sizeof(struct in_addr)) { 2879 ND_TCHECK2(*tptr, sizeof(struct in_addr)); 2880 ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr))); 2881 tptr += sizeof(struct in_addr); 2882 tmp -= sizeof(struct in_addr); 2883 } 2884 break; 2885 2886 case ISIS_TLV_HOSTNAME: 2887 ND_PRINT((ndo, "\n\t Hostname: ")); 2888 if (fn_printzp(ndo, tptr, tmp, ndo->ndo_snapend)) 2889 goto trunctlv; 2890 break; 2891 2892 case ISIS_TLV_SHARED_RISK_GROUP: 2893 if (tmp < NODE_ID_LEN) 2894 break; 2895 ND_TCHECK2(*tptr, NODE_ID_LEN); 2896 ND_PRINT((ndo, "\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN))); 2897 tptr+=(NODE_ID_LEN); 2898 tmp-=(NODE_ID_LEN); 2899 2900 if (tmp < 1) 2901 break; 2902 ND_TCHECK2(*tptr, 1); 2903 ND_PRINT((ndo, ", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered")); 2904 tmp--; 2905 2906 if (tmp < sizeof(struct in_addr)) 2907 break; 2908 ND_TCHECK2(*tptr, sizeof(struct in_addr)); 2909 ND_PRINT((ndo, "\n\t IPv4 interface address: %s", ipaddr_string(ndo, tptr))); 2910 tptr+=sizeof(struct in_addr); 2911 tmp-=sizeof(struct in_addr); 2912 2913 if (tmp < sizeof(struct in_addr)) 2914 break; 2915 ND_TCHECK2(*tptr, sizeof(struct in_addr)); 2916 ND_PRINT((ndo, "\n\t IPv4 neighbor address: %s", ipaddr_string(ndo, tptr))); 2917 tptr+=sizeof(struct in_addr); 2918 tmp-=sizeof(struct in_addr); 2919 2920 while (tmp>=4) { 2921 ND_TCHECK2(*tptr, 4); 2922 ND_PRINT((ndo, "\n\t Link-ID: 0x%08x", EXTRACT_32BITS(tptr))); 2923 tptr+=4; 2924 tmp-=4; 2925 } 2926 break; 2927 2928 case ISIS_TLV_LSP: 2929 tlv_lsp = (const struct isis_tlv_lsp *)tptr; 2930 while(tmp>=sizeof(struct isis_tlv_lsp)) { 2931 ND_TCHECK((tlv_lsp->lsp_id)[LSP_ID_LEN-1]); 2932 ND_PRINT((ndo, "\n\t lsp-id: %s", 2933 isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN))); 2934 ND_TCHECK2(tlv_lsp->sequence_number, 4); 2935 ND_PRINT((ndo, ", seq: 0x%08x", EXTRACT_32BITS(tlv_lsp->sequence_number))); 2936 ND_TCHECK2(tlv_lsp->remaining_lifetime, 2); 2937 ND_PRINT((ndo, ", lifetime: %5ds", EXTRACT_16BITS(tlv_lsp->remaining_lifetime))); 2938 ND_TCHECK2(tlv_lsp->checksum, 2); 2939 ND_PRINT((ndo, ", chksum: 0x%04x", EXTRACT_16BITS(tlv_lsp->checksum))); 2940 tmp-=sizeof(struct isis_tlv_lsp); 2941 tlv_lsp++; 2942 } 2943 break; 2944 2945 case ISIS_TLV_CHECKSUM: 2946 if (tmp < ISIS_TLV_CHECKSUM_MINLEN) 2947 break; 2948 ND_TCHECK2(*tptr, ISIS_TLV_CHECKSUM_MINLEN); 2949 ND_PRINT((ndo, "\n\t checksum: 0x%04x ", EXTRACT_16BITS(tptr))); 2950 /* do not attempt to verify the checksum if it is zero 2951 * most likely a HMAC-MD5 TLV is also present and 2952 * to avoid conflicts the checksum TLV is zeroed. 2953 * see rfc3358 for details 2954 */ 2955 osi_print_cksum(ndo, optr, EXTRACT_16BITS(tptr), tptr-optr, 2956 length); 2957 break; 2958 2959 case ISIS_TLV_POI: 2960 if (tlv_len >= SYSTEM_ID_LEN + 1) { 2961 ND_TCHECK2(*tptr, SYSTEM_ID_LEN + 1); 2962 ND_PRINT((ndo, "\n\t Purge Originator System-ID: %s", 2963 isis_print_id(tptr + 1, SYSTEM_ID_LEN))); 2964 } 2965 2966 if (tlv_len == 2 * SYSTEM_ID_LEN + 1) { 2967 ND_TCHECK2(*tptr, 2 * SYSTEM_ID_LEN + 1); 2968 ND_PRINT((ndo, "\n\t Received from System-ID: %s", 2969 isis_print_id(tptr + SYSTEM_ID_LEN + 1, SYSTEM_ID_LEN))); 2970 } 2971 break; 2972 2973 case ISIS_TLV_MT_SUPPORTED: 2974 if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN) 2975 break; 2976 while (tmp>1) { 2977 /* length can only be a multiple of 2, otherwise there is 2978 something broken -> so decode down until length is 1 */ 2979 if (tmp!=1) { 2980 mt_len = isis_print_mtid(ndo, tptr, "\n\t "); 2981 if (mt_len == 0) /* did something go wrong ? */ 2982 goto trunctlv; 2983 tptr+=mt_len; 2984 tmp-=mt_len; 2985 } else { 2986 ND_PRINT((ndo, "\n\t invalid MT-ID")); 2987 break; 2988 } 2989 } 2990 break; 2991 2992 case ISIS_TLV_RESTART_SIGNALING: 2993 /* first attempt to decode the flags */ 2994 if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN) 2995 break; 2996 ND_TCHECK2(*tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN); 2997 ND_PRINT((ndo, "\n\t Flags [%s]", 2998 bittok2str(isis_restart_flag_values, "none", *tptr))); 2999 tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; 3000 tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; 3001 3002 /* is there anything other than the flags field? */ 3003 if (tmp == 0) 3004 break; 3005 3006 if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN) 3007 break; 3008 ND_TCHECK2(*tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN); 3009 3010 ND_PRINT((ndo, ", Remaining holding time %us", EXTRACT_16BITS(tptr))); 3011 tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; 3012 tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; 3013 3014 /* is there an additional sysid field present ?*/ 3015 if (tmp == SYSTEM_ID_LEN) { 3016 ND_TCHECK2(*tptr, SYSTEM_ID_LEN); 3017 ND_PRINT((ndo, ", for %s", isis_print_id(tptr,SYSTEM_ID_LEN))); 3018 } 3019 break; 3020 3021 case ISIS_TLV_IDRP_INFO: 3022 if (tmp < ISIS_TLV_IDRP_INFO_MINLEN) 3023 break; 3024 ND_TCHECK2(*tptr, ISIS_TLV_IDRP_INFO_MINLEN); 3025 ND_PRINT((ndo, "\n\t Inter-Domain Information Type: %s", 3026 tok2str(isis_subtlv_idrp_values, 3027 "Unknown (0x%02x)", 3028 *tptr))); 3029 switch (*tptr++) { 3030 case ISIS_SUBTLV_IDRP_ASN: 3031 ND_TCHECK2(*tptr, 2); /* fetch AS number */ 3032 ND_PRINT((ndo, "AS Number: %u", EXTRACT_16BITS(tptr))); 3033 break; 3034 case ISIS_SUBTLV_IDRP_LOCAL: 3035 case ISIS_SUBTLV_IDRP_RES: 3036 default: 3037 if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_len - 1)) 3038 return(0); 3039 break; 3040 } 3041 break; 3042 3043 case ISIS_TLV_LSP_BUFFERSIZE: 3044 if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN) 3045 break; 3046 ND_TCHECK2(*tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN); 3047 ND_PRINT((ndo, "\n\t LSP Buffersize: %u", EXTRACT_16BITS(tptr))); 3048 break; 3049 3050 case ISIS_TLV_PART_DIS: 3051 while (tmp >= SYSTEM_ID_LEN) { 3052 ND_TCHECK2(*tptr, SYSTEM_ID_LEN); 3053 ND_PRINT((ndo, "\n\t %s", isis_print_id(tptr, SYSTEM_ID_LEN))); 3054 tptr+=SYSTEM_ID_LEN; 3055 tmp-=SYSTEM_ID_LEN; 3056 } 3057 break; 3058 3059 case ISIS_TLV_PREFIX_NEIGH: 3060 if (tmp < sizeof(struct isis_metric_block)) 3061 break; 3062 ND_TCHECK2(*tptr, sizeof(struct isis_metric_block)); 3063 ND_PRINT((ndo, "\n\t Metric Block")); 3064 isis_print_metric_block(ndo, (const struct isis_metric_block *)tptr); 3065 tptr+=sizeof(struct isis_metric_block); 3066 tmp-=sizeof(struct isis_metric_block); 3067 3068 while(tmp>0) { 3069 ND_TCHECK2(*tptr, 1); 3070 prefix_len=*tptr++; /* read out prefix length in semioctets*/ 3071 if (prefix_len < 2) { 3072 ND_PRINT((ndo, "\n\t\tAddress: prefix length %u < 2", prefix_len)); 3073 break; 3074 } 3075 tmp--; 3076 if (tmp < prefix_len/2) 3077 break; 3078 ND_TCHECK2(*tptr, prefix_len / 2); 3079 ND_PRINT((ndo, "\n\t\tAddress: %s/%u", 3080 isonsap_string(ndo, tptr, prefix_len / 2), prefix_len * 4)); 3081 tptr+=prefix_len/2; 3082 tmp-=prefix_len/2; 3083 } 3084 break; 3085 3086 case ISIS_TLV_IIH_SEQNR: 3087 if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN) 3088 break; 3089 ND_TCHECK2(*tptr, ISIS_TLV_IIH_SEQNR_MINLEN); /* check if four bytes are on the wire */ 3090 ND_PRINT((ndo, "\n\t Sequence number: %u", EXTRACT_32BITS(tptr))); 3091 break; 3092 3093 case ISIS_TLV_VENDOR_PRIVATE: 3094 if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN) 3095 break; 3096 ND_TCHECK2(*tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN); /* check if enough byte for a full oui */ 3097 vendor_id = EXTRACT_24BITS(tptr); 3098 ND_PRINT((ndo, "\n\t Vendor: %s (%u)", 3099 tok2str(oui_values, "Unknown", vendor_id), 3100 vendor_id)); 3101 tptr+=3; 3102 tmp-=3; 3103 if (tmp > 0) /* hexdump the rest */ 3104 if (!print_unknown_data(ndo, tptr, "\n\t\t", tmp)) 3105 return(0); 3106 break; 3107 /* 3108 * FIXME those are the defined TLVs that lack a decoder 3109 * you are welcome to contribute code ;-) 3110 */ 3111 3112 case ISIS_TLV_DECNET_PHASE4: 3113 case ISIS_TLV_LUCENT_PRIVATE: 3114 case ISIS_TLV_IPAUTH: 3115 case ISIS_TLV_NORTEL_PRIVATE1: 3116 case ISIS_TLV_NORTEL_PRIVATE2: 3117 3118 default: 3119 if (ndo->ndo_vflag <= 1) { 3120 if (!print_unknown_data(ndo, pptr, "\n\t\t", tlv_len)) 3121 return(0); 3122 } 3123 break; 3124 } 3125 /* do we want to see an additionally hexdump ? */ 3126 if (ndo->ndo_vflag> 1) { 3127 if (!print_unknown_data(ndo, pptr, "\n\t ", tlv_len)) 3128 return(0); 3129 } 3130 3131 pptr += tlv_len; 3132 packet_len -= tlv_len; 3133 } 3134 3135 if (packet_len != 0) { 3136 ND_PRINT((ndo, "\n\t %u straggler bytes", packet_len)); 3137 } 3138 return (1); 3139 3140 trunc: 3141 ND_PRINT((ndo, "%s", tstr)); 3142 return (1); 3143 3144 trunctlv: 3145 ND_PRINT((ndo, "\n\t\t")); 3146 ND_PRINT((ndo, "%s", tstr)); 3147 return(1); 3148} 3149 3150static void 3151osi_print_cksum(netdissect_options *ndo, const uint8_t *pptr, 3152 uint16_t checksum, int checksum_offset, u_int length) 3153{ 3154 uint16_t calculated_checksum; 3155 3156 /* do not attempt to verify the checksum if it is zero, 3157 * if the offset is nonsense, 3158 * or the base pointer is not sane 3159 */ 3160 if (!checksum 3161 || checksum_offset < 0 3162 || !ND_TTEST2(*(pptr + checksum_offset), 2) 3163 || (u_int)checksum_offset > length 3164 || !ND_TTEST2(*pptr, length)) { 3165 ND_PRINT((ndo, " (unverified)")); 3166 } else { 3167#if 0 3168 printf("\nosi_print_cksum: %p %u %u\n", pptr, checksum_offset, length); 3169#endif 3170 calculated_checksum = create_osi_cksum(pptr, checksum_offset, length); 3171 if (checksum == calculated_checksum) { 3172 ND_PRINT((ndo, " (correct)")); 3173 } else { 3174 ND_PRINT((ndo, " (incorrect should be 0x%04x)", calculated_checksum)); 3175 } 3176 } 3177} 3178 3179/* 3180 * Local Variables: 3181 * c-style: whitesmith 3182 * c-basic-offset: 8 3183 * End: 3184 */ 3185