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 (at) juniper.net) for more 24 * complete IS-IS & CLNP support. 25 */ 26 27 #ifndef lint 28 static const char rcsid[] _U_ = 29 "@(#) $Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.165 2008-08-16 13:38:15 hannes Exp $ (LBL)"; 30 #endif 31 32 #ifdef HAVE_CONFIG_H 33 #include "config.h" 34 #endif 35 36 #include <tcpdump-stdinc.h> 37 38 #include <stdio.h> 39 #include <string.h> 40 41 #include "interface.h" 42 #include "addrtoname.h" 43 #include "ethertype.h" 44 #include "ether.h" 45 #include "nlpid.h" 46 #include "extract.h" 47 #include "gmpls.h" 48 #include "oui.h" 49 #include "signature.h" 50 51 /* 52 * IS-IS is defined in ISO 10589. Look there for protocol definitions. 53 */ 54 55 #define SYSTEM_ID_LEN ETHER_ADDR_LEN 56 #define NODE_ID_LEN SYSTEM_ID_LEN+1 57 #define LSP_ID_LEN SYSTEM_ID_LEN+2 58 59 #define ISIS_VERSION 1 60 #define ESIS_VERSION 1 61 #define CLNP_VERSION 1 62 63 #define ISIS_PDU_TYPE_MASK 0x1F 64 #define ESIS_PDU_TYPE_MASK 0x1F 65 #define CLNP_PDU_TYPE_MASK 0x1F 66 #define CLNP_FLAG_MASK 0xE0 67 #define ISIS_LAN_PRIORITY_MASK 0x7F 68 69 #define ISIS_PDU_L1_LAN_IIH 15 70 #define ISIS_PDU_L2_LAN_IIH 16 71 #define ISIS_PDU_PTP_IIH 17 72 #define ISIS_PDU_L1_LSP 18 73 #define ISIS_PDU_L2_LSP 20 74 #define ISIS_PDU_L1_CSNP 24 75 #define ISIS_PDU_L2_CSNP 25 76 #define ISIS_PDU_L1_PSNP 26 77 #define ISIS_PDU_L2_PSNP 27 78 79 static const struct tok isis_pdu_values[] = { 80 { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"}, 81 { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"}, 82 { ISIS_PDU_PTP_IIH, "p2p IIH"}, 83 { ISIS_PDU_L1_LSP, "L1 LSP"}, 84 { ISIS_PDU_L2_LSP, "L2 LSP"}, 85 { ISIS_PDU_L1_CSNP, "L1 CSNP"}, 86 { ISIS_PDU_L2_CSNP, "L2 CSNP"}, 87 { ISIS_PDU_L1_PSNP, "L1 PSNP"}, 88 { ISIS_PDU_L2_PSNP, "L2 PSNP"}, 89 { 0, NULL} 90 }; 91 92 /* 93 * A TLV is a tuple of a type, length and a value and is normally used for 94 * encoding information in all sorts of places. This is an enumeration of 95 * the well known types. 96 * 97 * list taken from rfc3359 plus some memory from veterans ;-) 98 */ 99 100 #define ISIS_TLV_AREA_ADDR 1 /* iso10589 */ 101 #define ISIS_TLV_IS_REACH 2 /* iso10589 */ 102 #define ISIS_TLV_ESNEIGH 3 /* iso10589 */ 103 #define ISIS_TLV_PART_DIS 4 /* iso10589 */ 104 #define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */ 105 #define ISIS_TLV_ISNEIGH 6 /* iso10589 */ 106 #define ISIS_TLV_ISNEIGH_VARLEN 7 /* iso10589 */ 107 #define ISIS_TLV_PADDING 8 /* iso10589 */ 108 #define ISIS_TLV_LSP 9 /* iso10589 */ 109 #define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */ 110 #define ISIS_TLV_CHECKSUM 12 /* rfc3358 */ 111 #define ISIS_TLV_CHECKSUM_MINLEN 2 112 #define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */ 113 #define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2 114 #define ISIS_TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */ 115 #define ISIS_TLV_IS_ALIAS_ID 24 /* draft-ietf-isis-ext-lsp-frags-02 */ 116 #define ISIS_TLV_DECNET_PHASE4 42 117 #define ISIS_TLV_LUCENT_PRIVATE 66 118 #define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */ 119 #define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */ 120 #define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */ 121 #define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */ 122 #define ISIS_TLV_IDRP_INFO_MINLEN 1 123 #define ISIS_TLV_IPADDR 132 /* rfc1195 */ 124 #define ISIS_TLV_IPAUTH 133 /* rfc1195 */ 125 #define ISIS_TLV_TE_ROUTER_ID 134 /* draft-ietf-isis-traffic-05 */ 126 #define ISIS_TLV_EXTD_IP_REACH 135 /* draft-ietf-isis-traffic-05 */ 127 #define ISIS_TLV_HOSTNAME 137 /* rfc2763 */ 128 #define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */ 129 #define ISIS_TLV_MT_PORT_CAP 143 /* rfc6165 */ 130 #define ISIS_TLV_MT_CAPABILITY 144 /* rfc6329 */ 131 #define ISIS_TLV_NORTEL_PRIVATE1 176 132 #define ISIS_TLV_NORTEL_PRIVATE2 177 133 #define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */ 134 #define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1 135 #define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2 136 #define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */ 137 #define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */ 138 #define ISIS_TLV_MT_SUPPORTED_MINLEN 2 139 #define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */ 140 #define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */ 141 #define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */ 142 #define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */ 143 #define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */ 144 #define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */ 145 #define ISIS_TLV_IIH_SEQNR_MINLEN 4 146 #define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */ 147 #define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3 148 149 static const struct tok isis_tlv_values[] = { 150 { ISIS_TLV_AREA_ADDR, "Area address(es)"}, 151 { ISIS_TLV_IS_REACH, "IS Reachability"}, 152 { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"}, 153 { ISIS_TLV_PART_DIS, "Partition DIS"}, 154 { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"}, 155 { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"}, 156 { ISIS_TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"}, 157 { ISIS_TLV_PADDING, "Padding"}, 158 { ISIS_TLV_LSP, "LSP entries"}, 159 { ISIS_TLV_AUTH, "Authentication"}, 160 { ISIS_TLV_CHECKSUM, "Checksum"}, 161 { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"}, 162 { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"}, 163 { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"}, 164 { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"}, 165 { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"}, 166 { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"}, 167 { ISIS_TLV_PROTOCOLS, "Protocols supported"}, 168 { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"}, 169 { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"}, 170 { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"}, 171 { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"}, 172 { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"}, 173 { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"}, 174 { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"}, 175 { ISIS_TLV_MT_PORT_CAP, "Multi-Topology-Aware Port Capability"}, 176 { ISIS_TLV_MT_CAPABILITY, "Multi-Topology Capability"}, 177 { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"}, 178 { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"}, 179 { ISIS_TLV_HOSTNAME, "Hostname"}, 180 { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"}, 181 { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"}, 182 { ISIS_TLV_MT_SUPPORTED, "Multi Topology"}, 183 { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"}, 184 { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"}, 185 { ISIS_TLV_IP6_REACH, "IPv6 reachability"}, 186 { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"}, 187 { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"}, 188 { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"}, 189 { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"}, 190 { 0, NULL } 191 }; 192 193 #define ESIS_OPTION_PROTOCOLS 129 194 #define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */ 195 #define ESIS_OPTION_SECURITY 197 /* iso9542 */ 196 #define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */ 197 #define ESIS_OPTION_PRIORITY 205 /* iso9542 */ 198 #define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */ 199 #define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */ 200 201 static const struct tok esis_option_values[] = { 202 { ESIS_OPTION_PROTOCOLS, "Protocols supported"}, 203 { ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" }, 204 { ESIS_OPTION_SECURITY, "Security" }, 205 { ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" }, 206 { ESIS_OPTION_PRIORITY, "Priority" }, 207 { ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" }, 208 { ESIS_OPTION_SNPA_MASK, "SNPA Mask" }, 209 { 0, NULL } 210 }; 211 212 #define CLNP_OPTION_DISCARD_REASON 193 213 #define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */ 214 #define CLNP_OPTION_SECURITY 197 /* iso8473 */ 215 #define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */ 216 #define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */ 217 #define CLNP_OPTION_PADDING 204 /* iso8473 */ 218 #define CLNP_OPTION_PRIORITY 205 /* iso8473 */ 219 220 static const struct tok clnp_option_values[] = { 221 { CLNP_OPTION_DISCARD_REASON, "Discard Reason"}, 222 { CLNP_OPTION_PRIORITY, "Priority"}, 223 { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"}, 224 { CLNP_OPTION_SECURITY, "Security"}, 225 { CLNP_OPTION_SOURCE_ROUTING, "Source Routing"}, 226 { CLNP_OPTION_ROUTE_RECORDING, "Route Recording"}, 227 { CLNP_OPTION_PADDING, "Padding"}, 228 { 0, NULL } 229 }; 230 231 static const struct tok clnp_option_rfd_class_values[] = { 232 { 0x0, "General"}, 233 { 0x8, "Address"}, 234 { 0x9, "Source Routeing"}, 235 { 0xa, "Lifetime"}, 236 { 0xb, "PDU Discarded"}, 237 { 0xc, "Reassembly"}, 238 { 0, NULL } 239 }; 240 241 static const struct tok clnp_option_rfd_general_values[] = { 242 { 0x0, "Reason not specified"}, 243 { 0x1, "Protocol procedure error"}, 244 { 0x2, "Incorrect checksum"}, 245 { 0x3, "PDU discarded due to congestion"}, 246 { 0x4, "Header syntax error (cannot be parsed)"}, 247 { 0x5, "Segmentation needed but not permitted"}, 248 { 0x6, "Incomplete PDU received"}, 249 { 0x7, "Duplicate option"}, 250 { 0, NULL } 251 }; 252 253 static const struct tok clnp_option_rfd_address_values[] = { 254 { 0x0, "Destination address unreachable"}, 255 { 0x1, "Destination address unknown"}, 256 { 0, NULL } 257 }; 258 259 static const struct tok clnp_option_rfd_source_routeing_values[] = { 260 { 0x0, "Unspecified source routeing error"}, 261 { 0x1, "Syntax error in source routeing field"}, 262 { 0x2, "Unknown address in source routeing field"}, 263 { 0x3, "Path not acceptable"}, 264 { 0, NULL } 265 }; 266 267 static const struct tok clnp_option_rfd_lifetime_values[] = { 268 { 0x0, "Lifetime expired while data unit in transit"}, 269 { 0x1, "Lifetime expired during reassembly"}, 270 { 0, NULL } 271 }; 272 273 static const struct tok clnp_option_rfd_pdu_discard_values[] = { 274 { 0x0, "Unsupported option not specified"}, 275 { 0x1, "Unsupported protocol version"}, 276 { 0x2, "Unsupported security option"}, 277 { 0x3, "Unsupported source routeing option"}, 278 { 0x4, "Unsupported recording of route option"}, 279 { 0, NULL } 280 }; 281 282 static const struct tok clnp_option_rfd_reassembly_values[] = { 283 { 0x0, "Reassembly interference"}, 284 { 0, NULL } 285 }; 286 287 /* array of 16 error-classes */ 288 static const struct tok *clnp_option_rfd_error_class[] = { 289 clnp_option_rfd_general_values, 290 NULL, 291 NULL, 292 NULL, 293 NULL, 294 NULL, 295 NULL, 296 NULL, 297 clnp_option_rfd_address_values, 298 clnp_option_rfd_source_routeing_values, 299 clnp_option_rfd_lifetime_values, 300 clnp_option_rfd_pdu_discard_values, 301 clnp_option_rfd_reassembly_values, 302 NULL, 303 NULL, 304 NULL 305 }; 306 307 #define CLNP_OPTION_OPTION_QOS_MASK 0x3f 308 #define CLNP_OPTION_SCOPE_MASK 0xc0 309 #define CLNP_OPTION_SCOPE_SA_SPEC 0x40 310 #define CLNP_OPTION_SCOPE_DA_SPEC 0x80 311 #define CLNP_OPTION_SCOPE_GLOBAL 0xc0 312 313 static const struct tok clnp_option_scope_values[] = { 314 { CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"}, 315 { CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"}, 316 { CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"}, 317 { 0, NULL } 318 }; 319 320 static const struct tok clnp_option_sr_rr_values[] = { 321 { 0x0, "partial"}, 322 { 0x1, "complete"}, 323 { 0, NULL } 324 }; 325 326 static const struct tok clnp_option_sr_rr_string_values[] = { 327 { CLNP_OPTION_SOURCE_ROUTING, "source routing"}, 328 { CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"}, 329 { 0, NULL } 330 }; 331 332 static const struct tok clnp_option_qos_global_values[] = { 333 { 0x20, "reserved"}, 334 { 0x10, "sequencing vs. delay"}, 335 { 0x08, "congested"}, 336 { 0x04, "delay vs. cost"}, 337 { 0x02, "error vs. delay"}, 338 { 0x01, "error vs. cost"}, 339 { 0, NULL } 340 }; 341 342 #define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */ 343 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */ 344 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */ 345 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* draft-ietf-isis-traffic-05 */ 346 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* draft-ietf-isis-traffic-05 */ 347 #define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* draft-ietf-isis-traffic-05 */ 348 #define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* draft-ietf-isis-traffic-05 */ 349 #define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */ 350 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */ 351 #define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* draft-ietf-isis-traffic-05 */ 352 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */ 353 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */ 354 #define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */ 355 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */ 356 357 #define ISIS_SUBTLV_SPB_METRIC 29 /* rfc6329 */ 358 359 static const struct tok isis_ext_is_reach_subtlv_values[] = { 360 { ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" }, 361 { ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" }, 362 { ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" }, 363 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" }, 364 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" }, 365 { ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" }, 366 { ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" }, 367 { ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" }, 368 { ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" }, 369 { ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" }, 370 { ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" }, 371 { ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" }, 372 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" }, 373 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" }, 374 { ISIS_SUBTLV_SPB_METRIC, "SPB Metric" }, 375 { 250, "Reserved for cisco specific extensions" }, 376 { 251, "Reserved for cisco specific extensions" }, 377 { 252, "Reserved for cisco specific extensions" }, 378 { 253, "Reserved for cisco specific extensions" }, 379 { 254, "Reserved for cisco specific extensions" }, 380 { 255, "Reserved for future expansion" }, 381 { 0, NULL } 382 }; 383 384 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */ 385 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */ 386 #define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */ 387 388 static const struct tok isis_ext_ip_reach_subtlv_values[] = { 389 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" }, 390 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" }, 391 { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" }, 392 { 0, NULL } 393 }; 394 395 static const struct tok isis_subtlv_link_attribute_values[] = { 396 { 0x01, "Local Protection Available" }, 397 { 0x02, "Link excluded from local protection path" }, 398 { 0x04, "Local maintenance required"}, 399 { 0, NULL } 400 }; 401 402 #define ISIS_SUBTLV_AUTH_SIMPLE 1 403 #define ISIS_SUBTLV_AUTH_GENERIC 3 /* rfc 5310 */ 404 #define ISIS_SUBTLV_AUTH_MD5 54 405 #define ISIS_SUBTLV_AUTH_MD5_LEN 16 406 #define ISIS_SUBTLV_AUTH_PRIVATE 255 407 408 static const struct tok isis_subtlv_auth_values[] = { 409 { ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"}, 410 { ISIS_SUBTLV_AUTH_GENERIC, "Generic Crypto key-id"}, 411 { ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"}, 412 { ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"}, 413 { 0, NULL } 414 }; 415 416 #define ISIS_SUBTLV_IDRP_RES 0 417 #define ISIS_SUBTLV_IDRP_LOCAL 1 418 #define ISIS_SUBTLV_IDRP_ASN 2 419 420 static const struct tok isis_subtlv_idrp_values[] = { 421 { ISIS_SUBTLV_IDRP_RES, "Reserved"}, 422 { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"}, 423 { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"}, 424 { 0, NULL} 425 }; 426 427 #define ISIS_SUBTLV_SPB_MCID 4 428 #define ISIS_SUBTLV_SPB_DIGEST 5 429 #define ISIS_SUBTLV_SPB_BVID 6 430 431 #define ISIS_SUBTLV_SPB_INSTANCE 1 432 #define ISIS_SUBTLV_SPBM_SI 3 433 434 #define ISIS_SPB_MCID_LEN 51 435 #define ISIS_SUBTLV_SPB_MCID_MIN_LEN 102 436 #define ISIS_SUBTLV_SPB_DIGEST_MIN_LEN 33 437 #define ISIS_SUBTLV_SPB_BVID_MIN_LEN 6 438 #define ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN 19 439 #define ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN 8 440 441 static const struct tok isis_mt_port_cap_subtlv_values[] = { 442 { ISIS_SUBTLV_SPB_MCID, "SPB MCID" }, 443 { ISIS_SUBTLV_SPB_DIGEST, "SPB Digest" }, 444 { ISIS_SUBTLV_SPB_BVID, "SPB BVID" }, 445 { 0, NULL } 446 }; 447 448 static const struct tok isis_mt_capability_subtlv_values[] = { 449 { ISIS_SUBTLV_SPB_INSTANCE, "SPB Instance" }, 450 { ISIS_SUBTLV_SPBM_SI, "SPBM Service Identifier and Unicast Address" }, 451 { 0, NULL } 452 }; 453 454 struct isis_spb_mcid { 455 u_int8_t format_id; 456 u_int8_t name[32]; 457 u_int8_t revision_lvl[2]; 458 u_int8_t digest[16]; 459 }; 460 461 struct isis_subtlv_spb_mcid { 462 struct isis_spb_mcid mcid; 463 struct isis_spb_mcid aux_mcid; 464 }; 465 466 struct isis_subtlv_spb_instance { 467 u_int8_t cist_root_id[8]; 468 u_int8_t cist_external_root_path_cost[4]; 469 u_int8_t bridge_priority[2]; 470 u_int8_t spsourceid[4]; 471 u_int8_t no_of_trees; 472 }; 473 474 #define CLNP_SEGMENT_PART 0x80 475 #define CLNP_MORE_SEGMENTS 0x40 476 #define CLNP_REQUEST_ER 0x20 477 478 static const struct tok clnp_flag_values[] = { 479 { CLNP_SEGMENT_PART, "Segmentation permitted"}, 480 { CLNP_MORE_SEGMENTS, "more Segments"}, 481 { CLNP_REQUEST_ER, "request Error Report"}, 482 { 0, NULL} 483 }; 484 485 #define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4) 486 #define ISIS_MASK_LSP_ISTYPE_BITS(x) ((x)&0x3) 487 #define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80) 488 #define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78) 489 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40) 490 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20) 491 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10) 492 #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8) 493 494 #define ISIS_MASK_MTID(x) ((x)&0x0fff) 495 #define ISIS_MASK_MTFLAGS(x) ((x)&0xf000) 496 497 static const struct tok isis_mt_flag_values[] = { 498 { 0x4000, "ATT bit set"}, 499 { 0x8000, "Overload bit set"}, 500 { 0, NULL} 501 }; 502 503 #define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80) 504 #define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40) 505 506 #define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40) 507 #define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20) 508 509 #define ISIS_LSP_TLV_METRIC_SUPPORTED(x) ((x)&0x80) 510 #define ISIS_LSP_TLV_METRIC_IE(x) ((x)&0x40) 511 #define ISIS_LSP_TLV_METRIC_UPDOWN(x) ((x)&0x80) 512 #define ISIS_LSP_TLV_METRIC_VALUE(x) ((x)&0x3f) 513 514 #define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1) 515 516 static const struct tok isis_mt_values[] = { 517 { 0, "IPv4 unicast"}, 518 { 1, "In-Band Management"}, 519 { 2, "IPv6 unicast"}, 520 { 3, "Multicast"}, 521 { 4095, "Development, Experimental or Proprietary"}, 522 { 0, NULL } 523 }; 524 525 static const struct tok isis_iih_circuit_type_values[] = { 526 { 1, "Level 1 only"}, 527 { 2, "Level 2 only"}, 528 { 3, "Level 1, Level 2"}, 529 { 0, NULL} 530 }; 531 532 #define ISIS_LSP_TYPE_UNUSED0 0 533 #define ISIS_LSP_TYPE_LEVEL_1 1 534 #define ISIS_LSP_TYPE_UNUSED2 2 535 #define ISIS_LSP_TYPE_LEVEL_2 3 536 537 static const struct tok isis_lsp_istype_values[] = { 538 { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"}, 539 { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"}, 540 { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"}, 541 { ISIS_LSP_TYPE_LEVEL_2, "L2 IS"}, 542 { 0, NULL } 543 }; 544 545 /* 546 * Katz's point to point adjacency TLV uses codes to tell us the state of 547 * the remote adjacency. Enumerate them. 548 */ 549 550 #define ISIS_PTP_ADJ_UP 0 551 #define ISIS_PTP_ADJ_INIT 1 552 #define ISIS_PTP_ADJ_DOWN 2 553 554 static const struct tok isis_ptp_adjancey_values[] = { 555 { ISIS_PTP_ADJ_UP, "Up" }, 556 { ISIS_PTP_ADJ_INIT, "Initializing" }, 557 { ISIS_PTP_ADJ_DOWN, "Down" }, 558 { 0, NULL} 559 }; 560 561 struct isis_tlv_ptp_adj { 562 u_int8_t adjacency_state; 563 u_int8_t extd_local_circuit_id[4]; 564 u_int8_t neighbor_sysid[SYSTEM_ID_LEN]; 565 u_int8_t neighbor_extd_local_circuit_id[4]; 566 }; 567 568 static void osi_print_cksum(const u_int8_t *pptr, u_int16_t checksum, 569 u_int checksum_offset, u_int length); 570 static int clnp_print(const u_int8_t *, u_int); 571 static void esis_print(const u_int8_t *, u_int); 572 static int isis_print(const u_int8_t *, u_int); 573 574 struct isis_metric_block { 575 u_int8_t metric_default; 576 u_int8_t metric_delay; 577 u_int8_t metric_expense; 578 u_int8_t metric_error; 579 }; 580 581 struct isis_tlv_is_reach { 582 struct isis_metric_block isis_metric_block; 583 u_int8_t neighbor_nodeid[NODE_ID_LEN]; 584 }; 585 586 struct isis_tlv_es_reach { 587 struct isis_metric_block isis_metric_block; 588 u_int8_t neighbor_sysid[SYSTEM_ID_LEN]; 589 }; 590 591 struct isis_tlv_ip_reach { 592 struct isis_metric_block isis_metric_block; 593 u_int8_t prefix[4]; 594 u_int8_t mask[4]; 595 }; 596 597 static const struct tok isis_is_reach_virtual_values[] = { 598 { 0, "IsNotVirtual"}, 599 { 1, "IsVirtual"}, 600 { 0, NULL } 601 }; 602 603 static const struct tok isis_restart_flag_values[] = { 604 { 0x1, "Restart Request"}, 605 { 0x2, "Restart Acknowledgement"}, 606 { 0x4, "Suppress adjacency advertisement"}, 607 { 0, NULL } 608 }; 609 610 struct isis_common_header { 611 u_int8_t nlpid; 612 u_int8_t fixed_len; 613 u_int8_t version; /* Protocol version */ 614 u_int8_t id_length; 615 u_int8_t pdu_type; /* 3 MSbits are reserved */ 616 u_int8_t pdu_version; /* Packet format version */ 617 u_int8_t reserved; 618 u_int8_t max_area; 619 }; 620 621 struct isis_iih_lan_header { 622 u_int8_t circuit_type; 623 u_int8_t source_id[SYSTEM_ID_LEN]; 624 u_int8_t holding_time[2]; 625 u_int8_t pdu_len[2]; 626 u_int8_t priority; 627 u_int8_t lan_id[NODE_ID_LEN]; 628 }; 629 630 struct isis_iih_ptp_header { 631 u_int8_t circuit_type; 632 u_int8_t source_id[SYSTEM_ID_LEN]; 633 u_int8_t holding_time[2]; 634 u_int8_t pdu_len[2]; 635 u_int8_t circuit_id; 636 }; 637 638 struct isis_lsp_header { 639 u_int8_t pdu_len[2]; 640 u_int8_t remaining_lifetime[2]; 641 u_int8_t lsp_id[LSP_ID_LEN]; 642 u_int8_t sequence_number[4]; 643 u_int8_t checksum[2]; 644 u_int8_t typeblock; 645 }; 646 647 struct isis_csnp_header { 648 u_int8_t pdu_len[2]; 649 u_int8_t source_id[NODE_ID_LEN]; 650 u_int8_t start_lsp_id[LSP_ID_LEN]; 651 u_int8_t end_lsp_id[LSP_ID_LEN]; 652 }; 653 654 struct isis_psnp_header { 655 u_int8_t pdu_len[2]; 656 u_int8_t source_id[NODE_ID_LEN]; 657 }; 658 659 struct isis_tlv_lsp { 660 u_int8_t remaining_lifetime[2]; 661 u_int8_t lsp_id[LSP_ID_LEN]; 662 u_int8_t sequence_number[4]; 663 u_int8_t checksum[2]; 664 }; 665 666 #define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header)) 667 #define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header)) 668 #define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header)) 669 #define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header)) 670 #define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header)) 671 #define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header)) 672 673 void isoclns_print(const u_int8_t *p, u_int length, u_int caplen) 674 { 675 if (caplen <= 1) { /* enough bytes on the wire ? */ 676 printf("|OSI"); 677 return; 678 } 679 680 if (eflag) 681 printf("OSI NLPID %s (0x%02x): ", 682 tok2str(nlpid_values,"Unknown",*p), 683 *p); 684 685 switch (*p) { 686 687 case NLPID_CLNP: 688 if (!clnp_print(p, length)) 689 print_unknown_data(p,"\n\t",caplen); 690 break; 691 692 case NLPID_ESIS: 693 esis_print(p, length); 694 return; 695 696 case NLPID_ISIS: 697 if (!isis_print(p, length)) 698 print_unknown_data(p,"\n\t",caplen); 699 break; 700 701 case NLPID_NULLNS: 702 (void)printf("%slength: %u", 703 eflag ? "" : ", ", 704 length); 705 break; 706 707 case NLPID_Q933: 708 q933_print(p+1, length-1); 709 break; 710 711 case NLPID_IP: 712 ip_print(gndo, p+1, length-1); 713 break; 714 715 #ifdef INET6 716 case NLPID_IP6: 717 ip6_print(gndo, p+1, length-1); 718 break; 719 #endif 720 721 case NLPID_PPP: 722 ppp_print(p+1, length-1); 723 break; 724 725 default: 726 if (!eflag) 727 printf("OSI NLPID 0x%02x unknown",*p); 728 (void)printf("%slength: %u", 729 eflag ? "" : ", ", 730 length); 731 if (caplen > 1) 732 print_unknown_data(p,"\n\t",caplen); 733 break; 734 } 735 } 736 737 #define CLNP_PDU_ER 1 738 #define CLNP_PDU_DT 28 739 #define CLNP_PDU_MD 29 740 #define CLNP_PDU_ERQ 30 741 #define CLNP_PDU_ERP 31 742 743 static const struct tok clnp_pdu_values[] = { 744 { CLNP_PDU_ER, "Error Report"}, 745 { CLNP_PDU_MD, "MD"}, 746 { CLNP_PDU_DT, "Data"}, 747 { CLNP_PDU_ERQ, "Echo Request"}, 748 { CLNP_PDU_ERP, "Echo Response"}, 749 { 0, NULL } 750 }; 751 752 struct clnp_header_t { 753 u_int8_t nlpid; 754 u_int8_t length_indicator; 755 u_int8_t version; 756 u_int8_t lifetime; /* units of 500ms */ 757 u_int8_t type; 758 u_int8_t segment_length[2]; 759 u_int8_t cksum[2]; 760 }; 761 762 struct clnp_segment_header_t { 763 u_int8_t data_unit_id[2]; 764 u_int8_t segment_offset[2]; 765 u_int8_t total_length[2]; 766 }; 767 768 /* 769 * clnp_print 770 * Decode CLNP packets. Return 0 on error. 771 */ 772 773 static int clnp_print (const u_int8_t *pptr, u_int length) 774 { 775 const u_int8_t *optr,*source_address,*dest_address; 776 u_int li,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags; 777 const struct clnp_header_t *clnp_header; 778 const struct clnp_segment_header_t *clnp_segment_header; 779 u_int8_t rfd_error_major,rfd_error_minor; 780 781 clnp_header = (const struct clnp_header_t *) pptr; 782 TCHECK(*clnp_header); 783 784 li = clnp_header->length_indicator; 785 optr = pptr; 786 787 if (!eflag) 788 printf("CLNP"); 789 790 /* 791 * Sanity checking of the header. 792 */ 793 794 if (clnp_header->version != CLNP_VERSION) { 795 printf("version %d packet not supported", clnp_header->version); 796 return (0); 797 } 798 799 /* FIXME further header sanity checking */ 800 801 clnp_pdu_type = clnp_header->type & CLNP_PDU_TYPE_MASK; 802 clnp_flags = clnp_header->type & CLNP_FLAG_MASK; 803 804 pptr += sizeof(struct clnp_header_t); 805 li -= sizeof(struct clnp_header_t); 806 dest_address_length = *pptr; 807 dest_address = pptr + 1; 808 809 pptr += (1 + dest_address_length); 810 li -= (1 + dest_address_length); 811 source_address_length = *pptr; 812 source_address = pptr +1; 813 814 pptr += (1 + source_address_length); 815 li -= (1 + source_address_length); 816 817 if (vflag < 1) { 818 printf("%s%s > %s, %s, length %u", 819 eflag ? "" : ", ", 820 isonsap_string(source_address, source_address_length), 821 isonsap_string(dest_address, dest_address_length), 822 tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type), 823 length); 824 return (1); 825 } 826 printf("%slength %u",eflag ? "" : ", ",length); 827 828 printf("\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x", 829 tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type), 830 clnp_header->length_indicator, 831 clnp_header->version, 832 clnp_header->lifetime/2, 833 (clnp_header->lifetime%2)*5, 834 EXTRACT_16BITS(clnp_header->segment_length), 835 EXTRACT_16BITS(clnp_header->cksum)); 836 837 osi_print_cksum(optr, EXTRACT_16BITS(clnp_header->cksum), 7, 838 clnp_header->length_indicator); 839 840 printf("\n\tFlags [%s]", 841 bittok2str(clnp_flag_values,"none",clnp_flags)); 842 843 printf("\n\tsource address (length %u): %s\n\tdest address (length %u): %s", 844 source_address_length, 845 isonsap_string(source_address, source_address_length), 846 dest_address_length, 847 isonsap_string(dest_address,dest_address_length)); 848 849 if (clnp_flags & CLNP_SEGMENT_PART) { 850 clnp_segment_header = (const struct clnp_segment_header_t *) pptr; 851 TCHECK(*clnp_segment_header); 852 printf("\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u", 853 EXTRACT_16BITS(clnp_segment_header->data_unit_id), 854 EXTRACT_16BITS(clnp_segment_header->segment_offset), 855 EXTRACT_16BITS(clnp_segment_header->total_length)); 856 pptr+=sizeof(const struct clnp_segment_header_t); 857 li-=sizeof(const struct clnp_segment_header_t); 858 } 859 860 /* now walk the options */ 861 while (li >= 2) { 862 u_int op, opli; 863 const u_int8_t *tptr; 864 865 TCHECK2(*pptr, 2); 866 if (li < 2) { 867 printf(", bad opts/li"); 868 return (0); 869 } 870 op = *pptr++; 871 opli = *pptr++; 872 li -= 2; 873 TCHECK2(*pptr, opli); 874 if (opli > li) { 875 printf(", opt (%d) too long", op); 876 return (0); 877 } 878 li -= opli; 879 tptr = pptr; 880 tlen = opli; 881 882 printf("\n\t %s Option #%u, length %u, value: ", 883 tok2str(clnp_option_values,"Unknown",op), 884 op, 885 opli); 886 887 switch (op) { 888 889 890 case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */ 891 case CLNP_OPTION_SOURCE_ROUTING: 892 printf("%s %s", 893 tok2str(clnp_option_sr_rr_values,"Unknown",*tptr), 894 tok2str(clnp_option_sr_rr_string_values,"Unknown Option %u",op)); 895 nsap_offset=*(tptr+1); 896 if (nsap_offset == 0) { 897 printf(" Bad NSAP offset (0)"); 898 break; 899 } 900 nsap_offset-=1; /* offset to nsap list */ 901 if (nsap_offset > tlen) { 902 printf(" Bad NSAP offset (past end of option)"); 903 break; 904 } 905 tptr+=nsap_offset; 906 tlen-=nsap_offset; 907 while (tlen > 0) { 908 source_address_length=*tptr; 909 if (tlen < source_address_length+1) { 910 printf("\n\t NSAP address goes past end of option"); 911 break; 912 } 913 if (source_address_length > 0) { 914 source_address=(tptr+1); 915 TCHECK2(*source_address, source_address_length); 916 printf("\n\t NSAP address (length %u): %s", 917 source_address_length, 918 isonsap_string(source_address, source_address_length)); 919 } 920 tlen-=source_address_length+1; 921 } 922 break; 923 924 case CLNP_OPTION_PRIORITY: 925 printf("0x%1x", *tptr&0x0f); 926 break; 927 928 case CLNP_OPTION_QOS_MAINTENANCE: 929 printf("\n\t Format Code: %s", 930 tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK)); 931 932 if ((*tptr&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL) 933 printf("\n\t QoS Flags [%s]", 934 bittok2str(clnp_option_qos_global_values, 935 "none", 936 *tptr&CLNP_OPTION_OPTION_QOS_MASK)); 937 break; 938 939 case CLNP_OPTION_SECURITY: 940 printf("\n\t Format Code: %s, Security-Level %u", 941 tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK), 942 *(tptr+1)); 943 break; 944 945 case CLNP_OPTION_DISCARD_REASON: 946 rfd_error_major = (*tptr&0xf0) >> 4; 947 rfd_error_minor = *tptr&0x0f; 948 printf("\n\t Class: %s Error (0x%01x), %s (0x%01x)", 949 tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major), 950 rfd_error_major, 951 tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor), 952 rfd_error_minor); 953 break; 954 955 case CLNP_OPTION_PADDING: 956 printf("padding data"); 957 break; 958 959 /* 960 * FIXME those are the defined Options that lack a decoder 961 * you are welcome to contribute code ;-) 962 */ 963 964 default: 965 print_unknown_data(tptr,"\n\t ",opli); 966 break; 967 } 968 if (vflag > 1) 969 print_unknown_data(pptr,"\n\t ",opli); 970 pptr += opli; 971 } 972 973 switch (clnp_pdu_type) { 974 975 case CLNP_PDU_ER: /* fall through */ 976 case CLNP_PDU_ERP: 977 TCHECK(*pptr); 978 if (*(pptr) == NLPID_CLNP) { 979 printf("\n\t-----original packet-----\n\t"); 980 /* FIXME recursion protection */ 981 clnp_print(pptr, length-clnp_header->length_indicator); 982 break; 983 } 984 985 case CLNP_PDU_DT: 986 case CLNP_PDU_MD: 987 case CLNP_PDU_ERQ: 988 989 default: 990 /* dump the PDU specific data */ 991 if (length-(pptr-optr) > 0) { 992 printf("\n\t undecoded non-header data, length %u",length-clnp_header->length_indicator); 993 print_unknown_data(pptr,"\n\t ",length-(pptr-optr)); 994 } 995 } 996 997 return (1); 998 999 trunc: 1000 fputs("[|clnp]", stdout); 1001 return (1); 1002 1003 } 1004 1005 1006 #define ESIS_PDU_REDIRECT 6 1007 #define ESIS_PDU_ESH 2 1008 #define ESIS_PDU_ISH 4 1009 1010 static const struct tok esis_pdu_values[] = { 1011 { ESIS_PDU_REDIRECT, "redirect"}, 1012 { ESIS_PDU_ESH, "ESH"}, 1013 { ESIS_PDU_ISH, "ISH"}, 1014 { 0, NULL } 1015 }; 1016 1017 struct esis_header_t { 1018 u_int8_t nlpid; 1019 u_int8_t length_indicator; 1020 u_int8_t version; 1021 u_int8_t reserved; 1022 u_int8_t type; 1023 u_int8_t holdtime[2]; 1024 u_int8_t cksum[2]; 1025 }; 1026 1027 static void 1028 esis_print(const u_int8_t *pptr, u_int length) 1029 { 1030 const u_int8_t *optr; 1031 u_int li,esis_pdu_type,source_address_length, source_address_number; 1032 const struct esis_header_t *esis_header; 1033 1034 if (!eflag) 1035 printf("ES-IS"); 1036 1037 if (length <= 2) { 1038 if (qflag) 1039 printf("bad pkt!"); 1040 else 1041 printf("no header at all!"); 1042 return; 1043 } 1044 1045 esis_header = (const struct esis_header_t *) pptr; 1046 TCHECK(*esis_header); 1047 li = esis_header->length_indicator; 1048 optr = pptr; 1049 1050 /* 1051 * Sanity checking of the header. 1052 */ 1053 1054 if (esis_header->nlpid != NLPID_ESIS) { 1055 printf(" nlpid 0x%02x packet not supported", esis_header->nlpid); 1056 return; 1057 } 1058 1059 if (esis_header->version != ESIS_VERSION) { 1060 printf(" version %d packet not supported", esis_header->version); 1061 return; 1062 } 1063 1064 if (li > length) { 1065 printf(" length indicator(%d) > PDU size (%d)!", li, length); 1066 return; 1067 } 1068 1069 if (li < sizeof(struct esis_header_t) + 2) { 1070 printf(" length indicator < min PDU size %d:", li); 1071 while (--length != 0) 1072 printf("%02X", *pptr++); 1073 return; 1074 } 1075 1076 esis_pdu_type = esis_header->type & ESIS_PDU_TYPE_MASK; 1077 1078 if (vflag < 1) { 1079 printf("%s%s, length %u", 1080 eflag ? "" : ", ", 1081 tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type), 1082 length); 1083 return; 1084 } else 1085 printf("%slength %u\n\t%s (%u)", 1086 eflag ? "" : ", ", 1087 length, 1088 tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type), 1089 esis_pdu_type); 1090 1091 printf(", v: %u%s", esis_header->version, esis_header->version == ESIS_VERSION ? "" : "unsupported" ); 1092 printf(", checksum: 0x%04x", EXTRACT_16BITS(esis_header->cksum)); 1093 1094 osi_print_cksum(pptr, EXTRACT_16BITS(esis_header->cksum), 7, li); 1095 1096 printf(", holding time: %us, length indicator: %u",EXTRACT_16BITS(esis_header->holdtime),li); 1097 1098 if (vflag > 1) 1099 print_unknown_data(optr,"\n\t",sizeof(struct esis_header_t)); 1100 1101 pptr += sizeof(struct esis_header_t); 1102 li -= sizeof(struct esis_header_t); 1103 1104 switch (esis_pdu_type) { 1105 case ESIS_PDU_REDIRECT: { 1106 const u_int8_t *dst, *snpa, *neta; 1107 u_int dstl, snpal, netal; 1108 1109 TCHECK(*pptr); 1110 if (li < 1) { 1111 printf(", bad redirect/li"); 1112 return; 1113 } 1114 dstl = *pptr; 1115 pptr++; 1116 li--; 1117 TCHECK2(*pptr, dstl); 1118 if (li < dstl) { 1119 printf(", bad redirect/li"); 1120 return; 1121 } 1122 dst = pptr; 1123 pptr += dstl; 1124 li -= dstl; 1125 printf("\n\t %s", isonsap_string(dst,dstl)); 1126 1127 TCHECK(*pptr); 1128 if (li < 1) { 1129 printf(", bad redirect/li"); 1130 return; 1131 } 1132 snpal = *pptr; 1133 pptr++; 1134 li--; 1135 TCHECK2(*pptr, snpal); 1136 if (li < snpal) { 1137 printf(", bad redirect/li"); 1138 return; 1139 } 1140 snpa = pptr; 1141 pptr += snpal; 1142 li -= snpal; 1143 TCHECK(*pptr); 1144 if (li < 1) { 1145 printf(", bad redirect/li"); 1146 return; 1147 } 1148 netal = *pptr; 1149 pptr++; 1150 TCHECK2(*pptr, netal); 1151 if (li < netal) { 1152 printf(", bad redirect/li"); 1153 return; 1154 } 1155 neta = pptr; 1156 pptr += netal; 1157 li -= netal; 1158 1159 if (netal == 0) 1160 printf("\n\t %s", etheraddr_string(snpa)); 1161 else 1162 printf("\n\t %s", isonsap_string(neta,netal)); 1163 break; 1164 } 1165 1166 case ESIS_PDU_ESH: 1167 TCHECK(*pptr); 1168 if (li < 1) { 1169 printf(", bad esh/li"); 1170 return; 1171 } 1172 source_address_number = *pptr; 1173 pptr++; 1174 li--; 1175 1176 printf("\n\t Number of Source Addresses: %u", source_address_number); 1177 1178 while (source_address_number > 0) { 1179 TCHECK(*pptr); 1180 if (li < 1) { 1181 printf(", bad esh/li"); 1182 return; 1183 } 1184 source_address_length = *pptr; 1185 pptr++; 1186 li--; 1187 1188 TCHECK2(*pptr, source_address_length); 1189 if (li < source_address_length) { 1190 printf(", bad esh/li"); 1191 return; 1192 } 1193 printf("\n\t NET (length: %u): %s", 1194 source_address_length, 1195 isonsap_string(pptr,source_address_length)); 1196 pptr += source_address_length; 1197 li -= source_address_length; 1198 source_address_number--; 1199 } 1200 1201 break; 1202 1203 case ESIS_PDU_ISH: { 1204 TCHECK(*pptr); 1205 if (li < 1) { 1206 printf(", bad ish/li"); 1207 return; 1208 } 1209 source_address_length = *pptr; 1210 pptr++; 1211 li--; 1212 TCHECK2(*pptr, source_address_length); 1213 if (li < source_address_length) { 1214 printf(", bad ish/li"); 1215 return; 1216 } 1217 printf("\n\t NET (length: %u): %s", source_address_length, isonsap_string(pptr, source_address_length)); 1218 pptr += source_address_length; 1219 li -= source_address_length; 1220 break; 1221 } 1222 1223 default: 1224 if (vflag <= 1) { 1225 if (pptr < snapend) 1226 print_unknown_data(pptr,"\n\t ",snapend-pptr); 1227 } 1228 return; 1229 } 1230 1231 /* now walk the options */ 1232 while (li != 0) { 1233 u_int op, opli; 1234 const u_int8_t *tptr; 1235 1236 if (li < 2) { 1237 printf(", bad opts/li"); 1238 return; 1239 } 1240 TCHECK2(*pptr, 2); 1241 op = *pptr++; 1242 opli = *pptr++; 1243 li -= 2; 1244 if (opli > li) { 1245 printf(", opt (%d) too long", op); 1246 return; 1247 } 1248 li -= opli; 1249 tptr = pptr; 1250 1251 printf("\n\t %s Option #%u, length %u, value: ", 1252 tok2str(esis_option_values,"Unknown",op), 1253 op, 1254 opli); 1255 1256 switch (op) { 1257 1258 case ESIS_OPTION_ES_CONF_TIME: 1259 if (opli == 2) { 1260 TCHECK2(*pptr, 2); 1261 printf("%us", EXTRACT_16BITS(tptr)); 1262 } else 1263 printf("(bad length)"); 1264 break; 1265 1266 case ESIS_OPTION_PROTOCOLS: 1267 while (opli>0) { 1268 TCHECK(*pptr); 1269 printf("%s (0x%02x)", 1270 tok2str(nlpid_values, 1271 "unknown", 1272 *tptr), 1273 *tptr); 1274 if (opli>1) /* further NPLIDs ? - put comma */ 1275 printf(", "); 1276 tptr++; 1277 opli--; 1278 } 1279 break; 1280 1281 /* 1282 * FIXME those are the defined Options that lack a decoder 1283 * you are welcome to contribute code ;-) 1284 */ 1285 1286 case ESIS_OPTION_QOS_MAINTENANCE: 1287 case ESIS_OPTION_SECURITY: 1288 case ESIS_OPTION_PRIORITY: 1289 case ESIS_OPTION_ADDRESS_MASK: 1290 case ESIS_OPTION_SNPA_MASK: 1291 1292 default: 1293 print_unknown_data(tptr,"\n\t ",opli); 1294 break; 1295 } 1296 if (vflag > 1) 1297 print_unknown_data(pptr,"\n\t ",opli); 1298 pptr += opli; 1299 } 1300 trunc: 1301 return; 1302 } 1303 1304 1305 static void 1306 isis_print_mcid (const struct isis_spb_mcid *mcid) 1307 { 1308 int i; 1309 1310 printf( "ID: %d, Name: ", mcid->format_id); 1311 1312 for(i=0; i<32; i++) 1313 { 1314 printf("%c", mcid->name[i]); 1315 if(mcid->name[i] == '\0') 1316 break; 1317 } 1318 1319 printf("\n\t Lvl: %d", 1320 EXTRACT_16BITS(mcid->revision_lvl)); 1321 1322 printf( ", Digest: "); 1323 1324 for(i=0;i<16;i++) 1325 printf("%.2x ",mcid->digest[i]); 1326 } 1327 1328 static int 1329 isis_print_mt_port_cap_subtlv (const u_int8_t *tptr, int len) 1330 { 1331 int stlv_type, stlv_len; 1332 const struct isis_subtlv_spb_mcid *subtlv_spb_mcid; 1333 int i; 1334 1335 while (len > 0) 1336 { 1337 stlv_type = *(tptr++); 1338 stlv_len = *(tptr++); 1339 1340 /* first lets see if we know the subTLVs name*/ 1341 printf("\n\t %s subTLV #%u, length: %u", 1342 tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type), 1343 stlv_type, 1344 stlv_len); 1345 1346 /*len -= TLV_TYPE_LEN_OFFSET;*/ 1347 len = len -2; 1348 1349 switch (stlv_type) 1350 { 1351 case ISIS_SUBTLV_SPB_MCID: 1352 { 1353 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_MCID_MIN_LEN)) 1354 goto trunctlv; 1355 1356 subtlv_spb_mcid = (struct isis_subtlv_spb_mcid *)tptr; 1357 1358 printf( "\n\t MCID: "); 1359 isis_print_mcid (&(subtlv_spb_mcid->mcid)); 1360 1361 /*tptr += SPB_MCID_MIN_LEN; 1362 len -= SPB_MCID_MIN_LEN; */ 1363 1364 printf( "\n\t AUX-MCID: "); 1365 isis_print_mcid (&(subtlv_spb_mcid->aux_mcid)); 1366 1367 /*tptr += SPB_MCID_MIN_LEN; 1368 len -= SPB_MCID_MIN_LEN; */ 1369 tptr = tptr + sizeof(struct isis_subtlv_spb_mcid); 1370 len = len - sizeof(struct isis_subtlv_spb_mcid); 1371 1372 break; 1373 } 1374 1375 case ISIS_SUBTLV_SPB_DIGEST: 1376 { 1377 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_DIGEST_MIN_LEN)) 1378 goto trunctlv; 1379 1380 printf ("\n\t RES: %d V: %d A: %d D: %d", 1381 (*(tptr) >> 5), (((*tptr)>> 4) & 0x01), 1382 ((*(tptr) >> 2) & 0x03), ((*tptr) & 0x03)); 1383 1384 tptr++; 1385 1386 printf( "\n\t Digest: "); 1387 1388 for(i=1;i<=8; i++) 1389 { 1390 printf("%08x ", EXTRACT_32BITS(tptr)); 1391 if (i%4 == 0 && i != 8) 1392 printf("\n\t "); 1393 tptr = tptr + 4; 1394 } 1395 1396 len = len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN; 1397 1398 break; 1399 } 1400 1401 case ISIS_SUBTLV_SPB_BVID: 1402 { 1403 if (!TTEST2(*(tptr), stlv_len)) 1404 goto trunctlv; 1405 1406 while (len) 1407 { 1408 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_BVID_MIN_LEN)) 1409 goto trunctlv; 1410 1411 printf("\n\t ECT: %08x", 1412 EXTRACT_32BITS(tptr)); 1413 1414 tptr = tptr+4; 1415 1416 printf(" BVID: %d, U:%01x M:%01x ", 1417 (EXTRACT_16BITS (tptr) >> 4) , 1418 (EXTRACT_16BITS (tptr) >> 3) & 0x01, 1419 (EXTRACT_16BITS (tptr) >> 2) & 0x01); 1420 1421 tptr = tptr + 2; 1422 len = len - ISIS_SUBTLV_SPB_BVID_MIN_LEN; 1423 } 1424 1425 break; 1426 } 1427 1428 default: 1429 break; 1430 } 1431 } 1432 1433 return 0; 1434 1435 trunctlv: 1436 printf("\n\t\t packet exceeded snapshot"); 1437 return(1); 1438 } 1439 1440 static int 1441 isis_print_mt_capability_subtlv (const u_int8_t *tptr, int len) 1442 { 1443 int stlv_type, stlv_len, tmp; 1444 1445 while (len > 0) 1446 { 1447 stlv_type = *(tptr++); 1448 stlv_len = *(tptr++); 1449 1450 /* first lets see if we know the subTLVs name*/ 1451 printf("\n\t %s subTLV #%u, length: %u", 1452 tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type), 1453 stlv_type, 1454 stlv_len); 1455 1456 len = len - 2; 1457 1458 switch (stlv_type) 1459 { 1460 case ISIS_SUBTLV_SPB_INSTANCE: 1461 1462 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN)) 1463 goto trunctlv; 1464 1465 printf("\n\t CIST Root-ID: %08x", EXTRACT_32BITS(tptr)); 1466 tptr = tptr+4; 1467 printf(" %08x", EXTRACT_32BITS(tptr)); 1468 tptr = tptr+4; 1469 printf(", Path Cost: %08x", EXTRACT_32BITS(tptr)); 1470 tptr = tptr+4; 1471 printf(", Prio: %d", EXTRACT_16BITS(tptr)); 1472 tptr = tptr + 2; 1473 printf("\n\t RES: %d", 1474 EXTRACT_16BITS(tptr) >> 5); 1475 printf(", V: %d", 1476 (EXTRACT_16BITS(tptr) >> 4) & 0x0001); 1477 printf(", SPSource-ID: %d", 1478 (EXTRACT_32BITS(tptr) & 0x000fffff)); 1479 tptr = tptr+4; 1480 printf(", No of Trees: %x", *(tptr)); 1481 1482 tmp = *(tptr++); 1483 1484 len = len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN; 1485 1486 while (tmp) 1487 { 1488 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN)) 1489 goto trunctlv; 1490 1491 printf ("\n\t U:%d, M:%d, A:%d, RES:%d", 1492 *(tptr) >> 7, (*(tptr) >> 6) & 0x01, 1493 (*(tptr) >> 5) & 0x01, (*(tptr) & 0x1f)); 1494 1495 tptr++; 1496 1497 printf (", ECT: %08x", EXTRACT_32BITS(tptr)); 1498 1499 tptr = tptr + 4; 1500 1501 printf (", BVID: %d, SPVID: %d", 1502 (EXTRACT_24BITS(tptr) >> 12) & 0x000fff, 1503 EXTRACT_24BITS(tptr) & 0x000fff); 1504 1505 tptr = tptr + 3; 1506 len = len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN; 1507 tmp--; 1508 } 1509 1510 break; 1511 1512 case ISIS_SUBTLV_SPBM_SI: 1513 1514 if (!TTEST2(*(tptr), 6)) 1515 goto trunctlv; 1516 1517 printf("\n\t BMAC: %08x", EXTRACT_32BITS(tptr)); 1518 tptr = tptr+4; 1519 printf("%04x", EXTRACT_16BITS(tptr)); 1520 tptr = tptr+2; 1521 1522 printf (", RES: %d, VID: %d", EXTRACT_16BITS(tptr) >> 12, 1523 (EXTRACT_16BITS(tptr)) & 0x0fff); 1524 1525 tptr = tptr+2; 1526 len = len - 8; 1527 stlv_len = stlv_len - 8; 1528 1529 while (stlv_len) 1530 { 1531 printf("\n\t T: %d, R: %d, RES: %d, ISID: %d", 1532 (EXTRACT_32BITS(tptr) >> 31), 1533 (EXTRACT_32BITS(tptr) >> 30) & 0x01, 1534 (EXTRACT_32BITS(tptr) >> 24) & 0x03f, 1535 (EXTRACT_32BITS(tptr)) & 0x0ffffff); 1536 1537 tptr = tptr + 4; 1538 len = len - 4; 1539 stlv_len = stlv_len - 4; 1540 } 1541 1542 break; 1543 1544 default: 1545 break; 1546 } 1547 } 1548 return 0; 1549 1550 trunctlv: 1551 printf("\n\t\t packet exceeded snapshot"); 1552 return(1); 1553 } 1554 1555 1556 /* shared routine for printing system, node and lsp-ids */ 1557 static char * 1558 isis_print_id(const u_int8_t *cp, int id_len) 1559 { 1560 int i; 1561 static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")]; 1562 char *pos = id; 1563 1564 for (i = 1; i <= SYSTEM_ID_LEN; i++) { 1565 snprintf(pos, sizeof(id) - (pos - id), "%02x", *cp++); 1566 pos += strlen(pos); 1567 if (i == 2 || i == 4) 1568 *pos++ = '.'; 1569 } 1570 if (id_len >= NODE_ID_LEN) { 1571 snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++); 1572 pos += strlen(pos); 1573 } 1574 if (id_len == LSP_ID_LEN) 1575 snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp); 1576 return (id); 1577 } 1578 1579 /* print the 4-byte metric block which is common found in the old-style TLVs */ 1580 static int 1581 isis_print_metric_block (const struct isis_metric_block *isis_metric_block) 1582 { 1583 printf(", Default Metric: %d, %s", 1584 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default), 1585 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal"); 1586 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay)) 1587 printf("\n\t\t Delay Metric: %d, %s", 1588 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay), 1589 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal"); 1590 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense)) 1591 printf("\n\t\t Expense Metric: %d, %s", 1592 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense), 1593 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal"); 1594 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error)) 1595 printf("\n\t\t Error Metric: %d, %s", 1596 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error), 1597 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal"); 1598 1599 return(1); /* everything is ok */ 1600 } 1601 1602 static int 1603 isis_print_tlv_ip_reach (const u_int8_t *cp, const char *ident, int length) 1604 { 1605 int prefix_len; 1606 const struct isis_tlv_ip_reach *tlv_ip_reach; 1607 1608 tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp; 1609 1610 while (length > 0) { 1611 if ((size_t)length < sizeof(*tlv_ip_reach)) { 1612 printf("short IPv4 Reachability (%d vs %lu)", 1613 length, 1614 (unsigned long)sizeof(*tlv_ip_reach)); 1615 return (0); 1616 } 1617 1618 if (!TTEST(*tlv_ip_reach)) 1619 return (0); 1620 1621 prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask)); 1622 1623 if (prefix_len == -1) 1624 printf("%sIPv4 prefix: %s mask %s", 1625 ident, 1626 ipaddr_string((tlv_ip_reach->prefix)), 1627 ipaddr_string((tlv_ip_reach->mask))); 1628 else 1629 printf("%sIPv4 prefix: %15s/%u", 1630 ident, 1631 ipaddr_string((tlv_ip_reach->prefix)), 1632 prefix_len); 1633 1634 printf(", Distribution: %s, Metric: %u, %s", 1635 ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up", 1636 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default), 1637 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal"); 1638 1639 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay)) 1640 printf("%s Delay Metric: %u, %s", 1641 ident, 1642 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay), 1643 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal"); 1644 1645 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense)) 1646 printf("%s Expense Metric: %u, %s", 1647 ident, 1648 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense), 1649 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal"); 1650 1651 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error)) 1652 printf("%s Error Metric: %u, %s", 1653 ident, 1654 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error), 1655 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal"); 1656 1657 length -= sizeof(struct isis_tlv_ip_reach); 1658 tlv_ip_reach++; 1659 } 1660 return (1); 1661 } 1662 1663 /* 1664 * this is the common IP-REACH subTLV decoder it is called 1665 * from various EXTD-IP REACH TLVs (135,235,236,237) 1666 */ 1667 1668 static int 1669 isis_print_ip_reach_subtlv (const u_int8_t *tptr,int subt,int subl,const char *ident) { 1670 1671 /* first lets see if we know the subTLVs name*/ 1672 printf("%s%s subTLV #%u, length: %u", 1673 ident, 1674 tok2str(isis_ext_ip_reach_subtlv_values, 1675 "unknown", 1676 subt), 1677 subt, 1678 subl); 1679 1680 if (!TTEST2(*tptr,subl)) 1681 goto trunctlv; 1682 1683 switch(subt) { 1684 case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */ 1685 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32: 1686 while (subl >= 4) { 1687 printf(", 0x%08x (=%u)", 1688 EXTRACT_32BITS(tptr), 1689 EXTRACT_32BITS(tptr)); 1690 tptr+=4; 1691 subl-=4; 1692 } 1693 break; 1694 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64: 1695 while (subl >= 8) { 1696 printf(", 0x%08x%08x", 1697 EXTRACT_32BITS(tptr), 1698 EXTRACT_32BITS(tptr+4)); 1699 tptr+=8; 1700 subl-=8; 1701 } 1702 break; 1703 default: 1704 if(!print_unknown_data(tptr,"\n\t\t ", 1705 subl)) 1706 return(0); 1707 break; 1708 } 1709 return(1); 1710 1711 trunctlv: 1712 printf("%spacket exceeded snapshot",ident); 1713 return(0); 1714 } 1715 1716 /* 1717 * this is the common IS-REACH subTLV decoder it is called 1718 * from isis_print_ext_is_reach() 1719 */ 1720 1721 static int 1722 isis_print_is_reach_subtlv (const u_int8_t *tptr,u_int subt,u_int subl,const char *ident) { 1723 1724 u_int te_class,priority_level,gmpls_switch_cap; 1725 union { /* int to float conversion buffer for several subTLVs */ 1726 float f; 1727 u_int32_t i; 1728 } bw; 1729 1730 /* first lets see if we know the subTLVs name*/ 1731 printf("%s%s subTLV #%u, length: %u", 1732 ident, 1733 tok2str(isis_ext_is_reach_subtlv_values, 1734 "unknown", 1735 subt), 1736 subt, 1737 subl); 1738 1739 if (!TTEST2(*tptr,subl)) 1740 goto trunctlv; 1741 1742 switch(subt) { 1743 case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP: 1744 case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID: 1745 case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID: 1746 if (subl >= 4) { 1747 printf(", 0x%08x", EXTRACT_32BITS(tptr)); 1748 if (subl == 8) /* rfc4205 */ 1749 printf(", 0x%08x", EXTRACT_32BITS(tptr+4)); 1750 } 1751 break; 1752 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR: 1753 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR: 1754 if (subl >= sizeof(struct in_addr)) 1755 printf(", %s", ipaddr_string(tptr)); 1756 break; 1757 case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW : 1758 case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW: 1759 if (subl >= 4) { 1760 bw.i = EXTRACT_32BITS(tptr); 1761 printf(", %.3f Mbps", bw.f*8/1000000 ); 1762 } 1763 break; 1764 case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW : 1765 if (subl >= 32) { 1766 for (te_class = 0; te_class < 8; te_class++) { 1767 bw.i = EXTRACT_32BITS(tptr); 1768 printf("%s TE-Class %u: %.3f Mbps", 1769 ident, 1770 te_class, 1771 bw.f*8/1000000 ); 1772 tptr+=4; 1773 } 1774 } 1775 break; 1776 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */ 1777 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD: 1778 printf("%sBandwidth Constraints Model ID: %s (%u)", 1779 ident, 1780 tok2str(diffserv_te_bc_values, "unknown", *tptr), 1781 *tptr); 1782 tptr++; 1783 /* decode BCs until the subTLV ends */ 1784 for (te_class = 0; te_class < (subl-1)/4; te_class++) { 1785 bw.i = EXTRACT_32BITS(tptr); 1786 printf("%s Bandwidth constraint CT%u: %.3f Mbps", 1787 ident, 1788 te_class, 1789 bw.f*8/1000000 ); 1790 tptr+=4; 1791 } 1792 break; 1793 case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC: 1794 if (subl >= 3) 1795 printf(", %u", EXTRACT_24BITS(tptr)); 1796 break; 1797 case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE: 1798 if (subl == 2) { 1799 printf(", [ %s ] (0x%04x)", 1800 bittok2str(isis_subtlv_link_attribute_values, 1801 "Unknown", 1802 EXTRACT_16BITS(tptr)), 1803 EXTRACT_16BITS(tptr)); 1804 } 1805 break; 1806 case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE: 1807 if (subl >= 2) { 1808 printf(", %s, Priority %u", 1809 bittok2str(gmpls_link_prot_values, "none", *tptr), 1810 *(tptr+1)); 1811 } 1812 break; 1813 case ISIS_SUBTLV_SPB_METRIC: 1814 if (subl >= 6) { 1815 printf (", LM: %u", EXTRACT_24BITS(tptr)); 1816 tptr=tptr+3; 1817 printf (", P: %u", *(tptr)); 1818 tptr++; 1819 printf (", P-ID: %u", EXTRACT_16BITS(tptr)); 1820 } 1821 break; 1822 case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR: 1823 if (subl >= 36) { 1824 gmpls_switch_cap = *tptr; 1825 printf("%s Interface Switching Capability:%s", 1826 ident, 1827 tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap)); 1828 printf(", LSP Encoding: %s", 1829 tok2str(gmpls_encoding_values, "Unknown", *(tptr+1))); 1830 tptr+=4; 1831 printf("%s Max LSP Bandwidth:",ident); 1832 for (priority_level = 0; priority_level < 8; priority_level++) { 1833 bw.i = EXTRACT_32BITS(tptr); 1834 printf("%s priority level %d: %.3f Mbps", 1835 ident, 1836 priority_level, 1837 bw.f*8/1000000 ); 1838 tptr+=4; 1839 } 1840 subl-=36; 1841 switch (gmpls_switch_cap) { 1842 case GMPLS_PSC1: 1843 case GMPLS_PSC2: 1844 case GMPLS_PSC3: 1845 case GMPLS_PSC4: 1846 bw.i = EXTRACT_32BITS(tptr); 1847 printf("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f*8/1000000); 1848 printf("%s Interface MTU: %u", ident, EXTRACT_16BITS(tptr+4)); 1849 break; 1850 case GMPLS_TSC: 1851 bw.i = EXTRACT_32BITS(tptr); 1852 printf("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f*8/1000000); 1853 printf("%s Indication %s", ident, 1854 tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", *(tptr+4))); 1855 break; 1856 default: 1857 /* there is some optional stuff left to decode but this is as of yet 1858 not specified so just lets hexdump what is left */ 1859 if(subl>0){ 1860 if(!print_unknown_data(tptr,"\n\t\t ", 1861 subl)) 1862 return(0); 1863 } 1864 } 1865 } 1866 break; 1867 default: 1868 if(!print_unknown_data(tptr,"\n\t\t ", 1869 subl)) 1870 return(0); 1871 break; 1872 } 1873 return(1); 1874 1875 trunctlv: 1876 printf("%spacket exceeded snapshot",ident); 1877 return(0); 1878 } 1879 1880 1881 /* 1882 * this is the common IS-REACH decoder it is called 1883 * from various EXTD-IS REACH style TLVs (22,24,222) 1884 */ 1885 1886 static int 1887 isis_print_ext_is_reach (const u_int8_t *tptr,const char *ident, int tlv_type) { 1888 1889 char ident_buffer[20]; 1890 int subtlv_type,subtlv_len,subtlv_sum_len; 1891 int proc_bytes = 0; /* how many bytes did we process ? */ 1892 1893 if (!TTEST2(*tptr, NODE_ID_LEN)) 1894 return(0); 1895 1896 printf("%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN)); 1897 tptr+=(NODE_ID_LEN); 1898 1899 if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */ 1900 if (!TTEST2(*tptr, 3)) /* and is therefore skipped */ 1901 return(0); 1902 printf(", Metric: %d",EXTRACT_24BITS(tptr)); 1903 tptr+=3; 1904 } 1905 1906 if (!TTEST2(*tptr, 1)) 1907 return(0); 1908 subtlv_sum_len=*(tptr++); /* read out subTLV length */ 1909 proc_bytes=NODE_ID_LEN+3+1; 1910 printf(", %ssub-TLVs present",subtlv_sum_len ? "" : "no "); 1911 if (subtlv_sum_len) { 1912 printf(" (%u)",subtlv_sum_len); 1913 while (subtlv_sum_len>0) { 1914 if (!TTEST2(*tptr,2)) 1915 return(0); 1916 subtlv_type=*(tptr++); 1917 subtlv_len=*(tptr++); 1918 /* prepend the ident string */ 1919 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); 1920 if(!isis_print_is_reach_subtlv(tptr,subtlv_type,subtlv_len,ident_buffer)) 1921 return(0); 1922 tptr+=subtlv_len; 1923 subtlv_sum_len-=(subtlv_len+2); 1924 proc_bytes+=(subtlv_len+2); 1925 } 1926 } 1927 return(proc_bytes); 1928 } 1929 1930 /* 1931 * this is the common Multi Topology ID decoder 1932 * it is called from various MT-TLVs (222,229,235,237) 1933 */ 1934 1935 static int 1936 isis_print_mtid (const u_int8_t *tptr,const char *ident) { 1937 1938 if (!TTEST2(*tptr, 2)) 1939 return(0); 1940 1941 printf("%s%s", 1942 ident, 1943 tok2str(isis_mt_values, 1944 "Reserved for IETF Consensus", 1945 ISIS_MASK_MTID(EXTRACT_16BITS(tptr)))); 1946 1947 printf(" Topology (0x%03x), Flags: [%s]", 1948 ISIS_MASK_MTID(EXTRACT_16BITS(tptr)), 1949 bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_16BITS(tptr)))); 1950 1951 return(2); 1952 } 1953 1954 /* 1955 * this is the common extended IP reach decoder 1956 * it is called from TLVs (135,235,236,237) 1957 * we process the TLV and optional subTLVs and return 1958 * the amount of processed bytes 1959 */ 1960 1961 static int 1962 isis_print_extd_ip_reach (const u_int8_t *tptr, const char *ident, u_int16_t afi) { 1963 1964 char ident_buffer[20]; 1965 #ifdef INET6 1966 u_int8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */ 1967 #else 1968 u_int8_t prefix[sizeof(struct in_addr)]; /* shared copy buffer for IPv4 prefixes */ 1969 #endif 1970 u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen; 1971 1972 if (!TTEST2(*tptr, 4)) 1973 return (0); 1974 metric = EXTRACT_32BITS(tptr); 1975 processed=4; 1976 tptr+=4; 1977 1978 if (afi == AF_INET) { 1979 if (!TTEST2(*tptr, 1)) /* fetch status byte */ 1980 return (0); 1981 status_byte=*(tptr++); 1982 bit_length = status_byte&0x3f; 1983 if (bit_length > 32) { 1984 printf("%sIPv4 prefix: bad bit length %u", 1985 ident, 1986 bit_length); 1987 return (0); 1988 } 1989 processed++; 1990 #ifdef INET6 1991 } else if (afi == AF_INET6) { 1992 if (!TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */ 1993 return (0); 1994 status_byte=*(tptr++); 1995 bit_length=*(tptr++); 1996 if (bit_length > 128) { 1997 printf("%sIPv6 prefix: bad bit length %u", 1998 ident, 1999 bit_length); 2000 return (0); 2001 } 2002 processed+=2; 2003 #endif 2004 } else 2005 return (0); /* somebody is fooling us */ 2006 2007 byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */ 2008 2009 if (!TTEST2(*tptr, byte_length)) 2010 return (0); 2011 memset(prefix, 0, sizeof prefix); /* clear the copy buffer */ 2012 memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */ 2013 tptr+=byte_length; 2014 processed+=byte_length; 2015 2016 if (afi == AF_INET) 2017 printf("%sIPv4 prefix: %15s/%u", 2018 ident, 2019 ipaddr_string(prefix), 2020 bit_length); 2021 #ifdef INET6 2022 if (afi == AF_INET6) 2023 printf("%sIPv6 prefix: %s/%u", 2024 ident, 2025 ip6addr_string(prefix), 2026 bit_length); 2027 #endif 2028 2029 printf(", Distribution: %s, Metric: %u", 2030 ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up", 2031 metric); 2032 2033 if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) 2034 printf(", sub-TLVs present"); 2035 #ifdef INET6 2036 if (afi == AF_INET6) 2037 printf(", %s%s", 2038 ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal", 2039 ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : ""); 2040 #endif 2041 2042 if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) 2043 #ifdef INET6 2044 || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte)) 2045 #endif 2046 ) { 2047 /* assume that one prefix can hold more 2048 than one subTLV - therefore the first byte must reflect 2049 the aggregate bytecount of the subTLVs for this prefix 2050 */ 2051 if (!TTEST2(*tptr, 1)) 2052 return (0); 2053 sublen=*(tptr++); 2054 processed+=sublen+1; 2055 printf(" (%u)",sublen); /* print out subTLV length */ 2056 2057 while (sublen>0) { 2058 if (!TTEST2(*tptr,2)) 2059 return (0); 2060 subtlvtype=*(tptr++); 2061 subtlvlen=*(tptr++); 2062 /* prepend the ident string */ 2063 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); 2064 if(!isis_print_ip_reach_subtlv(tptr,subtlvtype,subtlvlen,ident_buffer)) 2065 return(0); 2066 tptr+=subtlvlen; 2067 sublen-=(subtlvlen+2); 2068 } 2069 } 2070 return (processed); 2071 } 2072 2073 /* 2074 * isis_print 2075 * Decode IS-IS packets. Return 0 on error. 2076 */ 2077 2078 static int isis_print (const u_int8_t *p, u_int length) 2079 { 2080 const struct isis_common_header *isis_header; 2081 2082 const struct isis_iih_lan_header *header_iih_lan; 2083 const struct isis_iih_ptp_header *header_iih_ptp; 2084 struct isis_lsp_header *header_lsp; 2085 const struct isis_csnp_header *header_csnp; 2086 const struct isis_psnp_header *header_psnp; 2087 2088 const struct isis_tlv_lsp *tlv_lsp; 2089 const struct isis_tlv_ptp_adj *tlv_ptp_adj; 2090 const struct isis_tlv_is_reach *tlv_is_reach; 2091 const struct isis_tlv_es_reach *tlv_es_reach; 2092 2093 u_int8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len; 2094 u_int8_t ext_is_len, ext_ip_len, mt_len; 2095 const u_int8_t *optr, *pptr, *tptr; 2096 u_short packet_len,pdu_len, key_id; 2097 u_int i,vendor_id; 2098 int sigcheck; 2099 2100 packet_len=length; 2101 optr = p; /* initialize the _o_riginal pointer to the packet start - 2102 need it for parsing the checksum TLV and authentication 2103 TLV verification */ 2104 isis_header = (const struct isis_common_header *)p; 2105 TCHECK(*isis_header); 2106 pptr = p+(ISIS_COMMON_HEADER_SIZE); 2107 header_iih_lan = (const struct isis_iih_lan_header *)pptr; 2108 header_iih_ptp = (const struct isis_iih_ptp_header *)pptr; 2109 header_lsp = (struct isis_lsp_header *)pptr; 2110 header_csnp = (const struct isis_csnp_header *)pptr; 2111 header_psnp = (const struct isis_psnp_header *)pptr; 2112 2113 if (!eflag) 2114 printf("IS-IS"); 2115 2116 /* 2117 * Sanity checking of the header. 2118 */ 2119 2120 if (isis_header->version != ISIS_VERSION) { 2121 printf("version %d packet not supported", isis_header->version); 2122 return (0); 2123 } 2124 2125 if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) { 2126 printf("system ID length of %d is not supported", 2127 isis_header->id_length); 2128 return (0); 2129 } 2130 2131 if (isis_header->pdu_version != ISIS_VERSION) { 2132 printf("version %d packet not supported", isis_header->pdu_version); 2133 return (0); 2134 } 2135 2136 max_area = isis_header->max_area; 2137 switch(max_area) { 2138 case 0: 2139 max_area = 3; /* silly shit */ 2140 break; 2141 case 255: 2142 printf("bad packet -- 255 areas"); 2143 return (0); 2144 default: 2145 break; 2146 } 2147 2148 id_length = isis_header->id_length; 2149 switch(id_length) { 2150 case 0: 2151 id_length = 6; /* silly shit again */ 2152 break; 2153 case 1: /* 1-8 are valid sys-ID lenghts */ 2154 case 2: 2155 case 3: 2156 case 4: 2157 case 5: 2158 case 6: 2159 case 7: 2160 case 8: 2161 break; 2162 case 255: 2163 id_length = 0; /* entirely useless */ 2164 break; 2165 default: 2166 break; 2167 } 2168 2169 /* toss any non 6-byte sys-ID len PDUs */ 2170 if (id_length != 6 ) { 2171 printf("bad packet -- illegal sys-ID length (%u)", id_length); 2172 return (0); 2173 } 2174 2175 pdu_type=isis_header->pdu_type; 2176 2177 /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/ 2178 if (vflag < 1) { 2179 printf("%s%s", 2180 eflag ? "" : ", ", 2181 tok2str(isis_pdu_values,"unknown PDU-Type %u",pdu_type)); 2182 2183 switch (pdu_type) { 2184 2185 case ISIS_PDU_L1_LAN_IIH: 2186 case ISIS_PDU_L2_LAN_IIH: 2187 printf(", src-id %s", 2188 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN)); 2189 printf(", lan-id %s, prio %u", 2190 isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN), 2191 header_iih_lan->priority); 2192 break; 2193 case ISIS_PDU_PTP_IIH: 2194 printf(", src-id %s", isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN)); 2195 break; 2196 case ISIS_PDU_L1_LSP: 2197 case ISIS_PDU_L2_LSP: 2198 printf(", lsp-id %s, seq 0x%08x, lifetime %5us", 2199 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), 2200 EXTRACT_32BITS(header_lsp->sequence_number), 2201 EXTRACT_16BITS(header_lsp->remaining_lifetime)); 2202 break; 2203 case ISIS_PDU_L1_CSNP: 2204 case ISIS_PDU_L2_CSNP: 2205 printf(", src-id %s", isis_print_id(header_csnp->source_id,NODE_ID_LEN)); 2206 break; 2207 case ISIS_PDU_L1_PSNP: 2208 case ISIS_PDU_L2_PSNP: 2209 printf(", src-id %s", isis_print_id(header_psnp->source_id,NODE_ID_LEN)); 2210 break; 2211 2212 } 2213 printf(", length %u", length); 2214 2215 return(1); 2216 } 2217 2218 /* ok they seem to want to know everything - lets fully decode it */ 2219 printf("%slength %u", eflag ? "" : ", ",length); 2220 2221 printf("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)", 2222 tok2str(isis_pdu_values, 2223 "unknown, type %u", 2224 pdu_type), 2225 isis_header->fixed_len, 2226 isis_header->version, 2227 isis_header->pdu_version, 2228 id_length, 2229 isis_header->id_length, 2230 max_area, 2231 isis_header->max_area); 2232 2233 if (vflag > 1) { 2234 if(!print_unknown_data(optr,"\n\t",8)) /* provide the _o_riginal pointer */ 2235 return(0); /* for optionally debugging the common header */ 2236 } 2237 2238 switch (pdu_type) { 2239 2240 case ISIS_PDU_L1_LAN_IIH: 2241 case ISIS_PDU_L2_LAN_IIH: 2242 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) { 2243 printf(", bogus fixed header length %u should be %lu", 2244 isis_header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE); 2245 return (0); 2246 } 2247 2248 pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len); 2249 if (packet_len>pdu_len) { 2250 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2251 length=pdu_len; 2252 } 2253 2254 TCHECK(*header_iih_lan); 2255 printf("\n\t source-id: %s, holding time: %us, Flags: [%s]", 2256 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN), 2257 EXTRACT_16BITS(header_iih_lan->holding_time), 2258 tok2str(isis_iih_circuit_type_values, 2259 "unknown circuit type 0x%02x", 2260 header_iih_lan->circuit_type)); 2261 2262 printf("\n\t lan-id: %s, Priority: %u, PDU length: %u", 2263 isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN), 2264 (header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK, 2265 pdu_len); 2266 2267 if (vflag > 1) { 2268 if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_LAN_HEADER_SIZE)) 2269 return(0); 2270 } 2271 2272 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); 2273 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); 2274 break; 2275 2276 case ISIS_PDU_PTP_IIH: 2277 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) { 2278 printf(", bogus fixed header length %u should be %lu", 2279 isis_header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE); 2280 return (0); 2281 } 2282 2283 pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len); 2284 if (packet_len>pdu_len) { 2285 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2286 length=pdu_len; 2287 } 2288 2289 TCHECK(*header_iih_ptp); 2290 printf("\n\t source-id: %s, holding time: %us, Flags: [%s]", 2291 isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN), 2292 EXTRACT_16BITS(header_iih_ptp->holding_time), 2293 tok2str(isis_iih_circuit_type_values, 2294 "unknown circuit type 0x%02x", 2295 header_iih_ptp->circuit_type)); 2296 2297 printf("\n\t circuit-id: 0x%02x, PDU length: %u", 2298 header_iih_ptp->circuit_id, 2299 pdu_len); 2300 2301 if (vflag > 1) { 2302 if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_PTP_HEADER_SIZE)) 2303 return(0); 2304 } 2305 2306 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); 2307 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); 2308 break; 2309 2310 case ISIS_PDU_L1_LSP: 2311 case ISIS_PDU_L2_LSP: 2312 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) { 2313 printf(", bogus fixed header length %u should be %lu", 2314 isis_header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE); 2315 return (0); 2316 } 2317 2318 pdu_len=EXTRACT_16BITS(header_lsp->pdu_len); 2319 if (packet_len>pdu_len) { 2320 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2321 length=pdu_len; 2322 } 2323 2324 TCHECK(*header_lsp); 2325 printf("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x", 2326 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), 2327 EXTRACT_32BITS(header_lsp->sequence_number), 2328 EXTRACT_16BITS(header_lsp->remaining_lifetime), 2329 EXTRACT_16BITS(header_lsp->checksum)); 2330 2331 2332 osi_print_cksum((u_int8_t *)header_lsp->lsp_id, 2333 EXTRACT_16BITS(header_lsp->checksum), 12, length-12); 2334 2335 /* 2336 * Clear checksum and lifetime prior to signature verification. 2337 */ 2338 header_lsp->checksum[0] = 0; 2339 header_lsp->checksum[1] = 0; 2340 header_lsp->remaining_lifetime[0] = 0; 2341 header_lsp->remaining_lifetime[1] = 0; 2342 2343 2344 printf(", PDU length: %u, Flags: [ %s", 2345 pdu_len, 2346 ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : ""); 2347 2348 if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) { 2349 printf("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : ""); 2350 printf("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : ""); 2351 printf("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : ""); 2352 printf("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : ""); 2353 printf("ATT bit set, "); 2354 } 2355 printf("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : ""); 2356 printf("%s ]", tok2str(isis_lsp_istype_values,"Unknown(0x%x)",ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock))); 2357 2358 if (vflag > 1) { 2359 if(!print_unknown_data(pptr,"\n\t ",ISIS_LSP_HEADER_SIZE)) 2360 return(0); 2361 } 2362 2363 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); 2364 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); 2365 break; 2366 2367 case ISIS_PDU_L1_CSNP: 2368 case ISIS_PDU_L2_CSNP: 2369 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) { 2370 printf(", bogus fixed header length %u should be %lu", 2371 isis_header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE); 2372 return (0); 2373 } 2374 2375 pdu_len=EXTRACT_16BITS(header_csnp->pdu_len); 2376 if (packet_len>pdu_len) { 2377 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2378 length=pdu_len; 2379 } 2380 2381 TCHECK(*header_csnp); 2382 printf("\n\t source-id: %s, PDU length: %u", 2383 isis_print_id(header_csnp->source_id, NODE_ID_LEN), 2384 pdu_len); 2385 printf("\n\t start lsp-id: %s", 2386 isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN)); 2387 printf("\n\t end lsp-id: %s", 2388 isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN)); 2389 2390 if (vflag > 1) { 2391 if(!print_unknown_data(pptr,"\n\t ",ISIS_CSNP_HEADER_SIZE)) 2392 return(0); 2393 } 2394 2395 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); 2396 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); 2397 break; 2398 2399 case ISIS_PDU_L1_PSNP: 2400 case ISIS_PDU_L2_PSNP: 2401 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) { 2402 printf("- bogus fixed header length %u should be %lu", 2403 isis_header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE); 2404 return (0); 2405 } 2406 2407 pdu_len=EXTRACT_16BITS(header_psnp->pdu_len); 2408 if (packet_len>pdu_len) { 2409 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2410 length=pdu_len; 2411 } 2412 2413 TCHECK(*header_psnp); 2414 printf("\n\t source-id: %s, PDU length: %u", 2415 isis_print_id(header_psnp->source_id, NODE_ID_LEN), 2416 pdu_len); 2417 2418 if (vflag > 1) { 2419 if(!print_unknown_data(pptr,"\n\t ",ISIS_PSNP_HEADER_SIZE)) 2420 return(0); 2421 } 2422 2423 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); 2424 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); 2425 break; 2426 2427 default: 2428 if(!print_unknown_data(pptr,"\n\t ",length)) 2429 return(0); 2430 return (0); 2431 } 2432 2433 /* 2434 * Now print the TLV's. 2435 */ 2436 2437 while (packet_len >= 2) { 2438 if (pptr == snapend) { 2439 return (1); 2440 } 2441 2442 if (!TTEST2(*pptr, 2)) { 2443 printf("\n\t\t packet exceeded snapshot (%ld) bytes", 2444 (long)(pptr-snapend)); 2445 return (1); 2446 } 2447 tlv_type = *pptr++; 2448 tlv_len = *pptr++; 2449 tmp =tlv_len; /* copy temporary len & pointer to packet data */ 2450 tptr = pptr; 2451 packet_len -= 2; 2452 if (tlv_len > packet_len) { 2453 break; 2454 } 2455 2456 /* first lets see if we know the TLVs name*/ 2457 printf("\n\t %s TLV #%u, length: %u", 2458 tok2str(isis_tlv_values, 2459 "unknown", 2460 tlv_type), 2461 tlv_type, 2462 tlv_len); 2463 2464 if (tlv_len == 0) /* something is malformed */ 2465 continue; 2466 2467 /* now check if we have a decoder otherwise do a hexdump at the end*/ 2468 switch (tlv_type) { 2469 case ISIS_TLV_AREA_ADDR: 2470 if (!TTEST2(*tptr, 1)) 2471 goto trunctlv; 2472 alen = *tptr++; 2473 while (tmp && alen < tmp) { 2474 printf("\n\t Area address (length: %u): %s", 2475 alen, 2476 isonsap_string(tptr,alen)); 2477 tptr += alen; 2478 tmp -= alen + 1; 2479 if (tmp==0) /* if this is the last area address do not attemt a boundary check */ 2480 break; 2481 if (!TTEST2(*tptr, 1)) 2482 goto trunctlv; 2483 alen = *tptr++; 2484 } 2485 break; 2486 case ISIS_TLV_ISNEIGH: 2487 while (tmp >= ETHER_ADDR_LEN) { 2488 if (!TTEST2(*tptr, ETHER_ADDR_LEN)) 2489 goto trunctlv; 2490 printf("\n\t SNPA: %s",isis_print_id(tptr,ETHER_ADDR_LEN)); 2491 tmp -= ETHER_ADDR_LEN; 2492 tptr += ETHER_ADDR_LEN; 2493 } 2494 break; 2495 2496 case ISIS_TLV_ISNEIGH_VARLEN: 2497 if (!TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */ 2498 goto trunctlv; 2499 lan_alen = *tptr++; /* LAN address length */ 2500 if (lan_alen == 0) { 2501 printf("\n\t LAN address length 0 bytes (invalid)"); 2502 break; 2503 } 2504 tmp --; 2505 printf("\n\t LAN address length %u bytes ",lan_alen); 2506 while (tmp >= lan_alen) { 2507 if (!TTEST2(*tptr, lan_alen)) 2508 goto trunctlv; 2509 printf("\n\t\tIS Neighbor: %s",isis_print_id(tptr,lan_alen)); 2510 tmp -= lan_alen; 2511 tptr +=lan_alen; 2512 } 2513 break; 2514 2515 case ISIS_TLV_PADDING: 2516 break; 2517 2518 case ISIS_TLV_MT_IS_REACH: 2519 mt_len = isis_print_mtid(tptr, "\n\t "); 2520 if (mt_len == 0) /* did something go wrong ? */ 2521 goto trunctlv; 2522 tptr+=mt_len; 2523 tmp-=mt_len; 2524 while (tmp >= 2+NODE_ID_LEN+3+1) { 2525 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); 2526 if (ext_is_len == 0) /* did something go wrong ? */ 2527 goto trunctlv; 2528 2529 tmp-=ext_is_len; 2530 tptr+=ext_is_len; 2531 } 2532 break; 2533 2534 case ISIS_TLV_IS_ALIAS_ID: 2535 while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */ 2536 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); 2537 if (ext_is_len == 0) /* did something go wrong ? */ 2538 goto trunctlv; 2539 tmp-=ext_is_len; 2540 tptr+=ext_is_len; 2541 } 2542 break; 2543 2544 case ISIS_TLV_EXT_IS_REACH: 2545 while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */ 2546 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); 2547 if (ext_is_len == 0) /* did something go wrong ? */ 2548 goto trunctlv; 2549 tmp-=ext_is_len; 2550 tptr+=ext_is_len; 2551 } 2552 break; 2553 case ISIS_TLV_IS_REACH: 2554 if (!TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */ 2555 goto trunctlv; 2556 printf("\n\t %s", 2557 tok2str(isis_is_reach_virtual_values, 2558 "bogus virtual flag 0x%02x", 2559 *tptr++)); 2560 tlv_is_reach = (const struct isis_tlv_is_reach *)tptr; 2561 while (tmp >= sizeof(struct isis_tlv_is_reach)) { 2562 if (!TTEST(*tlv_is_reach)) 2563 goto trunctlv; 2564 printf("\n\t IS Neighbor: %s", 2565 isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN)); 2566 isis_print_metric_block(&tlv_is_reach->isis_metric_block); 2567 tmp -= sizeof(struct isis_tlv_is_reach); 2568 tlv_is_reach++; 2569 } 2570 break; 2571 2572 case ISIS_TLV_ESNEIGH: 2573 tlv_es_reach = (const struct isis_tlv_es_reach *)tptr; 2574 while (tmp >= sizeof(struct isis_tlv_es_reach)) { 2575 if (!TTEST(*tlv_es_reach)) 2576 goto trunctlv; 2577 printf("\n\t ES Neighbor: %s", 2578 isis_print_id(tlv_es_reach->neighbor_sysid,SYSTEM_ID_LEN)); 2579 isis_print_metric_block(&tlv_es_reach->isis_metric_block); 2580 tmp -= sizeof(struct isis_tlv_es_reach); 2581 tlv_es_reach++; 2582 } 2583 break; 2584 2585 /* those two TLVs share the same format */ 2586 case ISIS_TLV_INT_IP_REACH: 2587 case ISIS_TLV_EXT_IP_REACH: 2588 if (!isis_print_tlv_ip_reach(pptr, "\n\t ", tlv_len)) 2589 return (1); 2590 break; 2591 2592 case ISIS_TLV_EXTD_IP_REACH: 2593 while (tmp>0) { 2594 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET); 2595 if (ext_ip_len == 0) /* did something go wrong ? */ 2596 goto trunctlv; 2597 tptr+=ext_ip_len; 2598 tmp-=ext_ip_len; 2599 } 2600 break; 2601 2602 case ISIS_TLV_MT_IP_REACH: 2603 mt_len = isis_print_mtid(tptr, "\n\t "); 2604 if (mt_len == 0) { /* did something go wrong ? */ 2605 goto trunctlv; 2606 } 2607 tptr+=mt_len; 2608 tmp-=mt_len; 2609 2610 while (tmp>0) { 2611 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET); 2612 if (ext_ip_len == 0) /* did something go wrong ? */ 2613 goto trunctlv; 2614 tptr+=ext_ip_len; 2615 tmp-=ext_ip_len; 2616 } 2617 break; 2618 2619 #ifdef INET6 2620 case ISIS_TLV_IP6_REACH: 2621 while (tmp>0) { 2622 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET6); 2623 if (ext_ip_len == 0) /* did something go wrong ? */ 2624 goto trunctlv; 2625 tptr+=ext_ip_len; 2626 tmp-=ext_ip_len; 2627 } 2628 break; 2629 2630 case ISIS_TLV_MT_IP6_REACH: 2631 mt_len = isis_print_mtid(tptr, "\n\t "); 2632 if (mt_len == 0) { /* did something go wrong ? */ 2633 goto trunctlv; 2634 } 2635 tptr+=mt_len; 2636 tmp-=mt_len; 2637 2638 while (tmp>0) { 2639 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET6); 2640 if (ext_ip_len == 0) /* did something go wrong ? */ 2641 goto trunctlv; 2642 tptr+=ext_ip_len; 2643 tmp-=ext_ip_len; 2644 } 2645 break; 2646 2647 case ISIS_TLV_IP6ADDR: 2648 while (tmp>=sizeof(struct in6_addr)) { 2649 if (!TTEST2(*tptr, sizeof(struct in6_addr))) 2650 goto trunctlv; 2651 2652 printf("\n\t IPv6 interface address: %s", 2653 ip6addr_string(tptr)); 2654 2655 tptr += sizeof(struct in6_addr); 2656 tmp -= sizeof(struct in6_addr); 2657 } 2658 break; 2659 #endif 2660 case ISIS_TLV_AUTH: 2661 if (!TTEST2(*tptr, 1)) 2662 goto trunctlv; 2663 2664 printf("\n\t %s: ", 2665 tok2str(isis_subtlv_auth_values, 2666 "unknown Authentication type 0x%02x", 2667 *tptr)); 2668 2669 switch (*tptr) { 2670 case ISIS_SUBTLV_AUTH_SIMPLE: 2671 for(i=1;i<tlv_len;i++) { 2672 if (!TTEST2(*(tptr+i), 1)) 2673 goto trunctlv; 2674 printf("%c",*(tptr+i)); 2675 } 2676 break; 2677 case ISIS_SUBTLV_AUTH_MD5: 2678 for(i=1;i<tlv_len;i++) { 2679 if (!TTEST2(*(tptr+i), 1)) 2680 goto trunctlv; 2681 printf("%02x",*(tptr+i)); 2682 } 2683 if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1) 2684 printf(", (malformed subTLV) "); 2685 2686 #ifdef HAVE_LIBCRYPTO 2687 sigcheck = signature_verify(optr, length, 2688 (unsigned char *)tptr + 1); 2689 #else 2690 sigcheck = CANT_CHECK_SIGNATURE; 2691 #endif 2692 printf(" (%s)", tok2str(signature_check_values, "Unknown", sigcheck)); 2693 2694 break; 2695 case ISIS_SUBTLV_AUTH_GENERIC: 2696 key_id = EXTRACT_16BITS((tptr+1)); 2697 printf("%u, password: ", key_id); 2698 for(i=1 + sizeof(u_int16_t);i<tlv_len;i++) { 2699 if (!TTEST2(*(tptr+i), 1)) 2700 goto trunctlv; 2701 printf("%02x",*(tptr+i)); 2702 } 2703 break; 2704 case ISIS_SUBTLV_AUTH_PRIVATE: 2705 default: 2706 if(!print_unknown_data(tptr+1,"\n\t\t ",tlv_len-1)) 2707 return(0); 2708 break; 2709 } 2710 break; 2711 2712 case ISIS_TLV_PTP_ADJ: 2713 tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr; 2714 if(tmp>=1) { 2715 if (!TTEST2(*tptr, 1)) 2716 goto trunctlv; 2717 printf("\n\t Adjacency State: %s (%u)", 2718 tok2str(isis_ptp_adjancey_values, "unknown", *tptr), 2719 *tptr); 2720 tmp--; 2721 } 2722 if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) { 2723 if (!TTEST2(tlv_ptp_adj->extd_local_circuit_id, 2724 sizeof(tlv_ptp_adj->extd_local_circuit_id))) 2725 goto trunctlv; 2726 printf("\n\t Extended Local circuit-ID: 0x%08x", 2727 EXTRACT_32BITS(tlv_ptp_adj->extd_local_circuit_id)); 2728 tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id); 2729 } 2730 if(tmp>=SYSTEM_ID_LEN) { 2731 if (!TTEST2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN)) 2732 goto trunctlv; 2733 printf("\n\t Neighbor System-ID: %s", 2734 isis_print_id(tlv_ptp_adj->neighbor_sysid,SYSTEM_ID_LEN)); 2735 tmp-=SYSTEM_ID_LEN; 2736 } 2737 if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) { 2738 if (!TTEST2(tlv_ptp_adj->neighbor_extd_local_circuit_id, 2739 sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id))) 2740 goto trunctlv; 2741 printf("\n\t Neighbor Extended Local circuit-ID: 0x%08x", 2742 EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id)); 2743 } 2744 break; 2745 2746 case ISIS_TLV_PROTOCOLS: 2747 printf("\n\t NLPID(s): "); 2748 while (tmp>0) { 2749 if (!TTEST2(*(tptr), 1)) 2750 goto trunctlv; 2751 printf("%s (0x%02x)", 2752 tok2str(nlpid_values, 2753 "unknown", 2754 *tptr), 2755 *tptr); 2756 if (tmp>1) /* further NPLIDs ? - put comma */ 2757 printf(", "); 2758 tptr++; 2759 tmp--; 2760 } 2761 break; 2762 2763 case ISIS_TLV_MT_PORT_CAP: 2764 { 2765 if (!TTEST2(*(tptr), 2)) 2766 goto trunctlv; 2767 2768 printf("\n\t RES: %d, MTID(s): %d", 2769 (EXTRACT_16BITS (tptr) >> 12), 2770 (EXTRACT_16BITS (tptr) & 0x0fff)); 2771 2772 tmp = tmp-2; 2773 tptr = tptr+2; 2774 2775 if (tmp) 2776 isis_print_mt_port_cap_subtlv (tptr, tmp); 2777 2778 break; 2779 } 2780 2781 case ISIS_TLV_MT_CAPABILITY: 2782 2783 if (!TTEST2(*(tptr), 2)) 2784 goto trunctlv; 2785 2786 printf("\n\t O: %d, RES: %d, MTID(s): %d", 2787 (EXTRACT_16BITS(tptr) >> 15) & 0x01, 2788 (EXTRACT_16BITS(tptr) >> 12) & 0x07, 2789 EXTRACT_16BITS(tptr) & 0x0fff); 2790 2791 tmp = tmp-2; 2792 tptr = tptr+2; 2793 2794 if (tmp) 2795 isis_print_mt_capability_subtlv (tptr, tmp); 2796 2797 break; 2798 2799 case ISIS_TLV_TE_ROUTER_ID: 2800 if (!TTEST2(*pptr, sizeof(struct in_addr))) 2801 goto trunctlv; 2802 printf("\n\t Traffic Engineering Router ID: %s", ipaddr_string(pptr)); 2803 break; 2804 2805 case ISIS_TLV_IPADDR: 2806 while (tmp>=sizeof(struct in_addr)) { 2807 if (!TTEST2(*tptr, sizeof(struct in_addr))) 2808 goto trunctlv; 2809 printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr)); 2810 tptr += sizeof(struct in_addr); 2811 tmp -= sizeof(struct in_addr); 2812 } 2813 break; 2814 2815 case ISIS_TLV_HOSTNAME: 2816 printf("\n\t Hostname: "); 2817 while (tmp>0) { 2818 if (!TTEST2(*tptr, 1)) 2819 goto trunctlv; 2820 printf("%c",*tptr++); 2821 tmp--; 2822 } 2823 break; 2824 2825 case ISIS_TLV_SHARED_RISK_GROUP: 2826 if (tmp < NODE_ID_LEN) 2827 break; 2828 if (!TTEST2(*tptr, NODE_ID_LEN)) 2829 goto trunctlv; 2830 printf("\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN)); 2831 tptr+=(NODE_ID_LEN); 2832 tmp-=(NODE_ID_LEN); 2833 2834 if (tmp < 1) 2835 break; 2836 if (!TTEST2(*tptr, 1)) 2837 goto trunctlv; 2838 printf(", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered"); 2839 tmp--; 2840 2841 if (tmp < sizeof(struct in_addr)) 2842 break; 2843 if (!TTEST2(*tptr,sizeof(struct in_addr))) 2844 goto trunctlv; 2845 printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr)); 2846 tptr+=sizeof(struct in_addr); 2847 tmp-=sizeof(struct in_addr); 2848 2849 if (tmp < sizeof(struct in_addr)) 2850 break; 2851 if (!TTEST2(*tptr,sizeof(struct in_addr))) 2852 goto trunctlv; 2853 printf("\n\t IPv4 neighbor address: %s", ipaddr_string(tptr)); 2854 tptr+=sizeof(struct in_addr); 2855 tmp-=sizeof(struct in_addr); 2856 2857 while (tmp>=4) { 2858 if (!TTEST2(*tptr, 4)) 2859 goto trunctlv; 2860 printf("\n\t Link-ID: 0x%08x", EXTRACT_32BITS(tptr)); 2861 tptr+=4; 2862 tmp-=4; 2863 } 2864 break; 2865 2866 case ISIS_TLV_LSP: 2867 tlv_lsp = (const struct isis_tlv_lsp *)tptr; 2868 while(tmp>=sizeof(struct isis_tlv_lsp)) { 2869 if (!TTEST((tlv_lsp->lsp_id)[LSP_ID_LEN-1])) 2870 goto trunctlv; 2871 printf("\n\t lsp-id: %s", 2872 isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN)); 2873 if (!TTEST2(tlv_lsp->sequence_number, 4)) 2874 goto trunctlv; 2875 printf(", seq: 0x%08x",EXTRACT_32BITS(tlv_lsp->sequence_number)); 2876 if (!TTEST2(tlv_lsp->remaining_lifetime, 2)) 2877 goto trunctlv; 2878 printf(", lifetime: %5ds",EXTRACT_16BITS(tlv_lsp->remaining_lifetime)); 2879 if (!TTEST2(tlv_lsp->checksum, 2)) 2880 goto trunctlv; 2881 printf(", chksum: 0x%04x",EXTRACT_16BITS(tlv_lsp->checksum)); 2882 tmp-=sizeof(struct isis_tlv_lsp); 2883 tlv_lsp++; 2884 } 2885 break; 2886 2887 case ISIS_TLV_CHECKSUM: 2888 if (tmp < ISIS_TLV_CHECKSUM_MINLEN) 2889 break; 2890 if (!TTEST2(*tptr, ISIS_TLV_CHECKSUM_MINLEN)) 2891 goto trunctlv; 2892 printf("\n\t checksum: 0x%04x ", EXTRACT_16BITS(tptr)); 2893 /* do not attempt to verify the checksum if it is zero 2894 * most likely a HMAC-MD5 TLV is also present and 2895 * to avoid conflicts the checksum TLV is zeroed. 2896 * see rfc3358 for details 2897 */ 2898 osi_print_cksum(optr, EXTRACT_16BITS(tptr), tptr-optr, length); 2899 break; 2900 2901 case ISIS_TLV_MT_SUPPORTED: 2902 if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN) 2903 break; 2904 while (tmp>1) { 2905 /* length can only be a multiple of 2, otherwise there is 2906 something broken -> so decode down until length is 1 */ 2907 if (tmp!=1) { 2908 mt_len = isis_print_mtid(tptr, "\n\t "); 2909 if (mt_len == 0) /* did something go wrong ? */ 2910 goto trunctlv; 2911 tptr+=mt_len; 2912 tmp-=mt_len; 2913 } else { 2914 printf("\n\t malformed MT-ID"); 2915 break; 2916 } 2917 } 2918 break; 2919 2920 case ISIS_TLV_RESTART_SIGNALING: 2921 /* first attempt to decode the flags */ 2922 if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN) 2923 break; 2924 if (!TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN)) 2925 goto trunctlv; 2926 printf("\n\t Flags [%s]", 2927 bittok2str(isis_restart_flag_values, "none", *tptr)); 2928 tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; 2929 tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; 2930 2931 /* is there anything other than the flags field? */ 2932 if (tmp == 0) 2933 break; 2934 2935 if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN) 2936 break; 2937 if (!TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)) 2938 goto trunctlv; 2939 2940 printf(", Remaining holding time %us", EXTRACT_16BITS(tptr)); 2941 tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; 2942 tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; 2943 2944 /* is there an additional sysid field present ?*/ 2945 if (tmp == SYSTEM_ID_LEN) { 2946 if (!TTEST2(*tptr, SYSTEM_ID_LEN)) 2947 goto trunctlv; 2948 printf(", for %s",isis_print_id(tptr,SYSTEM_ID_LEN)); 2949 } 2950 break; 2951 2952 case ISIS_TLV_IDRP_INFO: 2953 if (tmp < ISIS_TLV_IDRP_INFO_MINLEN) 2954 break; 2955 if (!TTEST2(*tptr, ISIS_TLV_IDRP_INFO_MINLEN)) 2956 goto trunctlv; 2957 printf("\n\t Inter-Domain Information Type: %s", 2958 tok2str(isis_subtlv_idrp_values, 2959 "Unknown (0x%02x)", 2960 *tptr)); 2961 switch (*tptr++) { 2962 case ISIS_SUBTLV_IDRP_ASN: 2963 if (!TTEST2(*tptr, 2)) /* fetch AS number */ 2964 goto trunctlv; 2965 printf("AS Number: %u",EXTRACT_16BITS(tptr)); 2966 break; 2967 case ISIS_SUBTLV_IDRP_LOCAL: 2968 case ISIS_SUBTLV_IDRP_RES: 2969 default: 2970 if(!print_unknown_data(tptr,"\n\t ",tlv_len-1)) 2971 return(0); 2972 break; 2973 } 2974 break; 2975 2976 case ISIS_TLV_LSP_BUFFERSIZE: 2977 if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN) 2978 break; 2979 if (!TTEST2(*tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN)) 2980 goto trunctlv; 2981 printf("\n\t LSP Buffersize: %u",EXTRACT_16BITS(tptr)); 2982 break; 2983 2984 case ISIS_TLV_PART_DIS: 2985 while (tmp >= SYSTEM_ID_LEN) { 2986 if (!TTEST2(*tptr, SYSTEM_ID_LEN)) 2987 goto trunctlv; 2988 printf("\n\t %s",isis_print_id(tptr,SYSTEM_ID_LEN)); 2989 tptr+=SYSTEM_ID_LEN; 2990 tmp-=SYSTEM_ID_LEN; 2991 } 2992 break; 2993 2994 case ISIS_TLV_PREFIX_NEIGH: 2995 if (tmp < sizeof(struct isis_metric_block)) 2996 break; 2997 if (!TTEST2(*tptr, sizeof(struct isis_metric_block))) 2998 goto trunctlv; 2999 printf("\n\t Metric Block"); 3000 isis_print_metric_block((const struct isis_metric_block *)tptr); 3001 tptr+=sizeof(struct isis_metric_block); 3002 tmp-=sizeof(struct isis_metric_block); 3003 3004 while(tmp>0) { 3005 if (!TTEST2(*tptr, 1)) 3006 goto trunctlv; 3007 prefix_len=*tptr++; /* read out prefix length in semioctets*/ 3008 if (prefix_len < 2) { 3009 printf("\n\t\tAddress: prefix length %u < 2", prefix_len); 3010 break; 3011 } 3012 tmp--; 3013 if (tmp < prefix_len/2) 3014 break; 3015 if (!TTEST2(*tptr, prefix_len/2)) 3016 goto trunctlv; 3017 printf("\n\t\tAddress: %s/%u", 3018 isonsap_string(tptr,prefix_len/2), 3019 prefix_len*4); 3020 tptr+=prefix_len/2; 3021 tmp-=prefix_len/2; 3022 } 3023 break; 3024 3025 case ISIS_TLV_IIH_SEQNR: 3026 if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN) 3027 break; 3028 if (!TTEST2(*tptr, ISIS_TLV_IIH_SEQNR_MINLEN)) /* check if four bytes are on the wire */ 3029 goto trunctlv; 3030 printf("\n\t Sequence number: %u", EXTRACT_32BITS(tptr) ); 3031 break; 3032 3033 case ISIS_TLV_VENDOR_PRIVATE: 3034 if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN) 3035 break; 3036 if (!TTEST2(*tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN)) /* check if enough byte for a full oui */ 3037 goto trunctlv; 3038 vendor_id = EXTRACT_24BITS(tptr); 3039 printf("\n\t Vendor: %s (%u)", 3040 tok2str(oui_values,"Unknown",vendor_id), 3041 vendor_id); 3042 tptr+=3; 3043 tmp-=3; 3044 if (tmp > 0) /* hexdump the rest */ 3045 if(!print_unknown_data(tptr,"\n\t\t",tmp)) 3046 return(0); 3047 break; 3048 /* 3049 * FIXME those are the defined TLVs that lack a decoder 3050 * you are welcome to contribute code ;-) 3051 */ 3052 3053 case ISIS_TLV_DECNET_PHASE4: 3054 case ISIS_TLV_LUCENT_PRIVATE: 3055 case ISIS_TLV_IPAUTH: 3056 case ISIS_TLV_NORTEL_PRIVATE1: 3057 case ISIS_TLV_NORTEL_PRIVATE2: 3058 3059 default: 3060 if (vflag <= 1) { 3061 if(!print_unknown_data(pptr,"\n\t\t",tlv_len)) 3062 return(0); 3063 } 3064 break; 3065 } 3066 /* do we want to see an additionally hexdump ? */ 3067 if (vflag> 1) { 3068 if(!print_unknown_data(pptr,"\n\t ",tlv_len)) 3069 return(0); 3070 } 3071 3072 pptr += tlv_len; 3073 packet_len -= tlv_len; 3074 } 3075 3076 if (packet_len != 0) { 3077 printf("\n\t %u straggler bytes", packet_len); 3078 } 3079 return (1); 3080 3081 trunc: 3082 fputs("[|isis]", stdout); 3083 return (1); 3084 3085 trunctlv: 3086 printf("\n\t\t packet exceeded snapshot"); 3087 return(1); 3088 } 3089 3090 static void 3091 osi_print_cksum (const u_int8_t *pptr, u_int16_t checksum, 3092 u_int checksum_offset, u_int length) 3093 { 3094 u_int16_t calculated_checksum; 3095 3096 /* do not attempt to verify the checksum if it is zero */ 3097 if (!checksum) { 3098 printf("(unverified)"); 3099 } else { 3100 calculated_checksum = create_osi_cksum(pptr, checksum_offset, length); 3101 if (checksum == calculated_checksum) { 3102 printf(" (correct)"); 3103 } else { 3104 printf(" (incorrect should be 0x%04x)", calculated_checksum); 3105 } 3106 } 3107 } 3108 3109 /* 3110 * Local Variables: 3111 * c-style: whitesmith 3112 * c-basic-offset: 8 3113 * End: 3114 */ 3115
