1 /* 2 * Copyright (c) 1992, 1993, 1994, 1995, 1996 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that: (1) source code distributions 7 * retain the above copyright notice and this paragraph in its entirety, (2) 8 * distributions including binary code include the above copyright notice and 9 * this paragraph in its entirety in the documentation or other materials 10 * provided with the distribution, and (3) all advertising materials mentioning 11 * features or use of this software display the following acknowledgement: 12 * ``This product includes software developed by the University of California, 13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14 * the University nor the names of its contributors may be used to endorse 15 * or promote products derived from this software without specific prior 16 * written permission. 17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20 * 21 * Original code by Matt Thomas, Digital Equipment Corporation 22 * 23 * Extensively modified by Hannes Gredler (hannes@juniper.net) for more 24 * complete IS-IS & CLNP support. 25 */ 26 27 #include <sys/cdefs.h> 28 #ifndef lint 29 #if 0 30 static const char rcsid[] _U_ = 31 "@(#) Header: /tcpdump/master/tcpdump/print-isoclns.c,v 1.165 2008-08-16 13:38:15 hannes Exp (LBL)"; 32 #else 33 __RCSID("$NetBSD: print-isoclns.c,v 1.4 2013/12/31 17:33:31 christos Exp $"); 34 #endif 35 #endif 36 37 #ifdef HAVE_CONFIG_H 38 #include "config.h" 39 #endif 40 41 #include <tcpdump-stdinc.h> 42 43 #include <stdio.h> 44 #include <string.h> 45 46 #include "interface.h" 47 #include "addrtoname.h" 48 #include "ethertype.h" 49 #include "ether.h" 50 #include "nlpid.h" 51 #include "extract.h" 52 #include "gmpls.h" 53 #include "oui.h" 54 #include "signature.h" 55 56 /* 57 * IS-IS is defined in ISO 10589. Look there for protocol definitions. 58 */ 59 60 #define SYSTEM_ID_LEN ETHER_ADDR_LEN 61 #define NODE_ID_LEN SYSTEM_ID_LEN+1 62 #define LSP_ID_LEN SYSTEM_ID_LEN+2 63 64 #define ISIS_VERSION 1 65 #define ESIS_VERSION 1 66 #define CLNP_VERSION 1 67 68 #define ISIS_PDU_TYPE_MASK 0x1F 69 #define ESIS_PDU_TYPE_MASK 0x1F 70 #define CLNP_PDU_TYPE_MASK 0x1F 71 #define CLNP_FLAG_MASK 0xE0 72 #define ISIS_LAN_PRIORITY_MASK 0x7F 73 74 #define ISIS_PDU_L1_LAN_IIH 15 75 #define ISIS_PDU_L2_LAN_IIH 16 76 #define ISIS_PDU_PTP_IIH 17 77 #define ISIS_PDU_L1_LSP 18 78 #define ISIS_PDU_L2_LSP 20 79 #define ISIS_PDU_L1_CSNP 24 80 #define ISIS_PDU_L2_CSNP 25 81 #define ISIS_PDU_L1_PSNP 26 82 #define ISIS_PDU_L2_PSNP 27 83 84 static const struct tok isis_pdu_values[] = { 85 { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"}, 86 { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"}, 87 { ISIS_PDU_PTP_IIH, "p2p IIH"}, 88 { ISIS_PDU_L1_LSP, "L1 LSP"}, 89 { ISIS_PDU_L2_LSP, "L2 LSP"}, 90 { ISIS_PDU_L1_CSNP, "L1 CSNP"}, 91 { ISIS_PDU_L2_CSNP, "L2 CSNP"}, 92 { ISIS_PDU_L1_PSNP, "L1 PSNP"}, 93 { ISIS_PDU_L2_PSNP, "L2 PSNP"}, 94 { 0, NULL} 95 }; 96 97 /* 98 * A TLV is a tuple of a type, length and a value and is normally used for 99 * encoding information in all sorts of places. This is an enumeration of 100 * the well known types. 101 * 102 * list taken from rfc3359 plus some memory from veterans ;-) 103 */ 104 105 #define ISIS_TLV_AREA_ADDR 1 /* iso10589 */ 106 #define ISIS_TLV_IS_REACH 2 /* iso10589 */ 107 #define ISIS_TLV_ESNEIGH 3 /* iso10589 */ 108 #define ISIS_TLV_PART_DIS 4 /* iso10589 */ 109 #define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */ 110 #define ISIS_TLV_ISNEIGH 6 /* iso10589 */ 111 #define ISIS_TLV_ISNEIGH_VARLEN 7 /* iso10589 */ 112 #define ISIS_TLV_PADDING 8 /* iso10589 */ 113 #define ISIS_TLV_LSP 9 /* iso10589 */ 114 #define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */ 115 #define ISIS_TLV_CHECKSUM 12 /* rfc3358 */ 116 #define ISIS_TLV_CHECKSUM_MINLEN 2 117 #define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */ 118 #define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2 119 #define ISIS_TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */ 120 #define ISIS_TLV_IS_ALIAS_ID 24 /* draft-ietf-isis-ext-lsp-frags-02 */ 121 #define ISIS_TLV_DECNET_PHASE4 42 122 #define ISIS_TLV_LUCENT_PRIVATE 66 123 #define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */ 124 #define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */ 125 #define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */ 126 #define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */ 127 #define ISIS_TLV_IDRP_INFO_MINLEN 1 128 #define ISIS_TLV_IPADDR 132 /* rfc1195 */ 129 #define ISIS_TLV_IPAUTH 133 /* rfc1195 */ 130 #define ISIS_TLV_TE_ROUTER_ID 134 /* draft-ietf-isis-traffic-05 */ 131 #define ISIS_TLV_EXTD_IP_REACH 135 /* draft-ietf-isis-traffic-05 */ 132 #define ISIS_TLV_HOSTNAME 137 /* rfc2763 */ 133 #define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */ 134 #define ISIS_TLV_MT_PORT_CAP 143 /* rfc6165 */ 135 #define ISIS_TLV_MT_CAPABILITY 144 /* rfc6329 */ 136 #define ISIS_TLV_NORTEL_PRIVATE1 176 137 #define ISIS_TLV_NORTEL_PRIVATE2 177 138 #define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */ 139 #define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1 140 #define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2 141 #define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */ 142 #define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */ 143 #define ISIS_TLV_MT_SUPPORTED_MINLEN 2 144 #define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */ 145 #define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */ 146 #define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */ 147 #define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */ 148 #define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */ 149 #define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */ 150 #define ISIS_TLV_IIH_SEQNR_MINLEN 4 151 #define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */ 152 #define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3 153 154 static const struct tok isis_tlv_values[] = { 155 { ISIS_TLV_AREA_ADDR, "Area address(es)"}, 156 { ISIS_TLV_IS_REACH, "IS Reachability"}, 157 { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"}, 158 { ISIS_TLV_PART_DIS, "Partition DIS"}, 159 { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"}, 160 { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"}, 161 { ISIS_TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"}, 162 { ISIS_TLV_PADDING, "Padding"}, 163 { ISIS_TLV_LSP, "LSP entries"}, 164 { ISIS_TLV_AUTH, "Authentication"}, 165 { ISIS_TLV_CHECKSUM, "Checksum"}, 166 { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"}, 167 { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"}, 168 { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"}, 169 { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"}, 170 { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"}, 171 { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"}, 172 { ISIS_TLV_PROTOCOLS, "Protocols supported"}, 173 { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"}, 174 { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"}, 175 { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"}, 176 { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"}, 177 { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"}, 178 { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"}, 179 { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"}, 180 { ISIS_TLV_MT_PORT_CAP, "Multi-Topology-Aware Port Capability"}, 181 { ISIS_TLV_MT_CAPABILITY, "Multi-Topology Capability"}, 182 { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"}, 183 { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"}, 184 { ISIS_TLV_HOSTNAME, "Hostname"}, 185 { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"}, 186 { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"}, 187 { ISIS_TLV_MT_SUPPORTED, "Multi Topology"}, 188 { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"}, 189 { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"}, 190 { ISIS_TLV_IP6_REACH, "IPv6 reachability"}, 191 { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"}, 192 { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"}, 193 { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"}, 194 { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"}, 195 { 0, NULL } 196 }; 197 198 #define ESIS_OPTION_PROTOCOLS 129 199 #define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */ 200 #define ESIS_OPTION_SECURITY 197 /* iso9542 */ 201 #define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */ 202 #define ESIS_OPTION_PRIORITY 205 /* iso9542 */ 203 #define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */ 204 #define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */ 205 206 static const struct tok esis_option_values[] = { 207 { ESIS_OPTION_PROTOCOLS, "Protocols supported"}, 208 { ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" }, 209 { ESIS_OPTION_SECURITY, "Security" }, 210 { ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" }, 211 { ESIS_OPTION_PRIORITY, "Priority" }, 212 { ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" }, 213 { ESIS_OPTION_SNPA_MASK, "SNPA Mask" }, 214 { 0, NULL } 215 }; 216 217 #define CLNP_OPTION_DISCARD_REASON 193 218 #define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */ 219 #define CLNP_OPTION_SECURITY 197 /* iso8473 */ 220 #define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */ 221 #define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */ 222 #define CLNP_OPTION_PADDING 204 /* iso8473 */ 223 #define CLNP_OPTION_PRIORITY 205 /* iso8473 */ 224 225 static const struct tok clnp_option_values[] = { 226 { CLNP_OPTION_DISCARD_REASON, "Discard Reason"}, 227 { CLNP_OPTION_PRIORITY, "Priority"}, 228 { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"}, 229 { CLNP_OPTION_SECURITY, "Security"}, 230 { CLNP_OPTION_SOURCE_ROUTING, "Source Routing"}, 231 { CLNP_OPTION_ROUTE_RECORDING, "Route Recording"}, 232 { CLNP_OPTION_PADDING, "Padding"}, 233 { 0, NULL } 234 }; 235 236 static const struct tok clnp_option_rfd_class_values[] = { 237 { 0x0, "General"}, 238 { 0x8, "Address"}, 239 { 0x9, "Source Routeing"}, 240 { 0xa, "Lifetime"}, 241 { 0xb, "PDU Discarded"}, 242 { 0xc, "Reassembly"}, 243 { 0, NULL } 244 }; 245 246 static const struct tok clnp_option_rfd_general_values[] = { 247 { 0x0, "Reason not specified"}, 248 { 0x1, "Protocol procedure error"}, 249 { 0x2, "Incorrect checksum"}, 250 { 0x3, "PDU discarded due to congestion"}, 251 { 0x4, "Header syntax error (cannot be parsed)"}, 252 { 0x5, "Segmentation needed but not permitted"}, 253 { 0x6, "Incomplete PDU received"}, 254 { 0x7, "Duplicate option"}, 255 { 0, NULL } 256 }; 257 258 static const struct tok clnp_option_rfd_address_values[] = { 259 { 0x0, "Destination address unreachable"}, 260 { 0x1, "Destination address unknown"}, 261 { 0, NULL } 262 }; 263 264 static const struct tok clnp_option_rfd_source_routeing_values[] = { 265 { 0x0, "Unspecified source routeing error"}, 266 { 0x1, "Syntax error in source routeing field"}, 267 { 0x2, "Unknown address in source routeing field"}, 268 { 0x3, "Path not acceptable"}, 269 { 0, NULL } 270 }; 271 272 static const struct tok clnp_option_rfd_lifetime_values[] = { 273 { 0x0, "Lifetime expired while data unit in transit"}, 274 { 0x1, "Lifetime expired during reassembly"}, 275 { 0, NULL } 276 }; 277 278 static const struct tok clnp_option_rfd_pdu_discard_values[] = { 279 { 0x0, "Unsupported option not specified"}, 280 { 0x1, "Unsupported protocol version"}, 281 { 0x2, "Unsupported security option"}, 282 { 0x3, "Unsupported source routeing option"}, 283 { 0x4, "Unsupported recording of route option"}, 284 { 0, NULL } 285 }; 286 287 static const struct tok clnp_option_rfd_reassembly_values[] = { 288 { 0x0, "Reassembly interference"}, 289 { 0, NULL } 290 }; 291 292 /* array of 16 error-classes */ 293 static const struct tok *clnp_option_rfd_error_class[] = { 294 clnp_option_rfd_general_values, 295 NULL, 296 NULL, 297 NULL, 298 NULL, 299 NULL, 300 NULL, 301 NULL, 302 clnp_option_rfd_address_values, 303 clnp_option_rfd_source_routeing_values, 304 clnp_option_rfd_lifetime_values, 305 clnp_option_rfd_pdu_discard_values, 306 clnp_option_rfd_reassembly_values, 307 NULL, 308 NULL, 309 NULL 310 }; 311 312 #define CLNP_OPTION_OPTION_QOS_MASK 0x3f 313 #define CLNP_OPTION_SCOPE_MASK 0xc0 314 #define CLNP_OPTION_SCOPE_SA_SPEC 0x40 315 #define CLNP_OPTION_SCOPE_DA_SPEC 0x80 316 #define CLNP_OPTION_SCOPE_GLOBAL 0xc0 317 318 static const struct tok clnp_option_scope_values[] = { 319 { CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"}, 320 { CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"}, 321 { CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"}, 322 { 0, NULL } 323 }; 324 325 static const struct tok clnp_option_sr_rr_values[] = { 326 { 0x0, "partial"}, 327 { 0x1, "complete"}, 328 { 0, NULL } 329 }; 330 331 static const struct tok clnp_option_sr_rr_string_values[] = { 332 { CLNP_OPTION_SOURCE_ROUTING, "source routing"}, 333 { CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"}, 334 { 0, NULL } 335 }; 336 337 static const struct tok clnp_option_qos_global_values[] = { 338 { 0x20, "reserved"}, 339 { 0x10, "sequencing vs. delay"}, 340 { 0x08, "congested"}, 341 { 0x04, "delay vs. cost"}, 342 { 0x02, "error vs. delay"}, 343 { 0x01, "error vs. cost"}, 344 { 0, NULL } 345 }; 346 347 #define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */ 348 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */ 349 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */ 350 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* draft-ietf-isis-traffic-05 */ 351 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* draft-ietf-isis-traffic-05 */ 352 #define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* draft-ietf-isis-traffic-05 */ 353 #define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* draft-ietf-isis-traffic-05 */ 354 #define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */ 355 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */ 356 #define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* draft-ietf-isis-traffic-05 */ 357 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */ 358 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */ 359 #define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */ 360 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */ 361 362 #define ISIS_SUBTLV_SPB_METRIC 29 /* rfc6329 */ 363 364 static const struct tok isis_ext_is_reach_subtlv_values[] = { 365 { ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" }, 366 { ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" }, 367 { ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" }, 368 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" }, 369 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" }, 370 { ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" }, 371 { ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" }, 372 { ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" }, 373 { ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" }, 374 { ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" }, 375 { ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" }, 376 { ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" }, 377 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" }, 378 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" }, 379 { ISIS_SUBTLV_SPB_METRIC, "SPB Metric" }, 380 { 250, "Reserved for cisco specific extensions" }, 381 { 251, "Reserved for cisco specific extensions" }, 382 { 252, "Reserved for cisco specific extensions" }, 383 { 253, "Reserved for cisco specific extensions" }, 384 { 254, "Reserved for cisco specific extensions" }, 385 { 255, "Reserved for future expansion" }, 386 { 0, NULL } 387 }; 388 389 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */ 390 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */ 391 #define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */ 392 393 static const struct tok isis_ext_ip_reach_subtlv_values[] = { 394 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" }, 395 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" }, 396 { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" }, 397 { 0, NULL } 398 }; 399 400 static const struct tok isis_subtlv_link_attribute_values[] = { 401 { 0x01, "Local Protection Available" }, 402 { 0x02, "Link excluded from local protection path" }, 403 { 0x04, "Local maintenance required"}, 404 { 0, NULL } 405 }; 406 407 #define ISIS_SUBTLV_AUTH_SIMPLE 1 408 #define ISIS_SUBTLV_AUTH_GENERIC 3 /* rfc 5310 */ 409 #define ISIS_SUBTLV_AUTH_MD5 54 410 #define ISIS_SUBTLV_AUTH_MD5_LEN 16 411 #define ISIS_SUBTLV_AUTH_PRIVATE 255 412 413 static const struct tok isis_subtlv_auth_values[] = { 414 { ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"}, 415 { ISIS_SUBTLV_AUTH_GENERIC, "Generic Crypto key-id"}, 416 { ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"}, 417 { ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"}, 418 { 0, NULL } 419 }; 420 421 #define ISIS_SUBTLV_IDRP_RES 0 422 #define ISIS_SUBTLV_IDRP_LOCAL 1 423 #define ISIS_SUBTLV_IDRP_ASN 2 424 425 static const struct tok isis_subtlv_idrp_values[] = { 426 { ISIS_SUBTLV_IDRP_RES, "Reserved"}, 427 { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"}, 428 { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"}, 429 { 0, NULL} 430 }; 431 432 #define ISIS_SUBTLV_SPB_MCID 4 433 #define ISIS_SUBTLV_SPB_DIGEST 5 434 #define ISIS_SUBTLV_SPB_BVID 6 435 436 #define ISIS_SUBTLV_SPB_INSTANCE 1 437 #define ISIS_SUBTLV_SPBM_SI 3 438 439 #define ISIS_SPB_MCID_LEN 51 440 #define ISIS_SUBTLV_SPB_MCID_MIN_LEN 102 441 #define ISIS_SUBTLV_SPB_DIGEST_MIN_LEN 33 442 #define ISIS_SUBTLV_SPB_BVID_MIN_LEN 6 443 #define ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN 19 444 #define ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN 8 445 446 static const struct tok isis_mt_port_cap_subtlv_values[] = { 447 { ISIS_SUBTLV_SPB_MCID, "SPB MCID" }, 448 { ISIS_SUBTLV_SPB_DIGEST, "SPB Digest" }, 449 { ISIS_SUBTLV_SPB_BVID, "SPB BVID" }, 450 { 0, NULL } 451 }; 452 453 static const struct tok isis_mt_capability_subtlv_values[] = { 454 { ISIS_SUBTLV_SPB_INSTANCE, "SPB Instance" }, 455 { ISIS_SUBTLV_SPBM_SI, "SPBM Service Identifier and Unicast Address" }, 456 { 0, NULL } 457 }; 458 459 struct isis_spb_mcid { 460 u_int8_t format_id; 461 u_int8_t name[32]; 462 u_int8_t revision_lvl[2]; 463 u_int8_t digest[16]; 464 }; 465 466 struct isis_subtlv_spb_mcid { 467 struct isis_spb_mcid mcid; 468 struct isis_spb_mcid aux_mcid; 469 }; 470 471 struct isis_subtlv_spb_instance { 472 u_int8_t cist_root_id[8]; 473 u_int8_t cist_external_root_path_cost[4]; 474 u_int8_t bridge_priority[2]; 475 u_int8_t spsourceid[4]; 476 u_int8_t no_of_trees; 477 }; 478 479 #define CLNP_SEGMENT_PART 0x80 480 #define CLNP_MORE_SEGMENTS 0x40 481 #define CLNP_REQUEST_ER 0x20 482 483 static const struct tok clnp_flag_values[] = { 484 { CLNP_SEGMENT_PART, "Segmentation permitted"}, 485 { CLNP_MORE_SEGMENTS, "more Segments"}, 486 { CLNP_REQUEST_ER, "request Error Report"}, 487 { 0, NULL} 488 }; 489 490 #define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4) 491 #define ISIS_MASK_LSP_ISTYPE_BITS(x) ((x)&0x3) 492 #define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80) 493 #define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78) 494 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40) 495 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20) 496 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10) 497 #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8) 498 499 #define ISIS_MASK_MTID(x) ((x)&0x0fff) 500 #define ISIS_MASK_MTFLAGS(x) ((x)&0xf000) 501 502 static const struct tok isis_mt_flag_values[] = { 503 { 0x4000, "ATT bit set"}, 504 { 0x8000, "Overload bit set"}, 505 { 0, NULL} 506 }; 507 508 #define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80) 509 #define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40) 510 511 #define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40) 512 #define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20) 513 514 #define ISIS_LSP_TLV_METRIC_SUPPORTED(x) ((x)&0x80) 515 #define ISIS_LSP_TLV_METRIC_IE(x) ((x)&0x40) 516 #define ISIS_LSP_TLV_METRIC_UPDOWN(x) ((x)&0x80) 517 #define ISIS_LSP_TLV_METRIC_VALUE(x) ((x)&0x3f) 518 519 #define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1) 520 521 static const struct tok isis_mt_values[] = { 522 { 0, "IPv4 unicast"}, 523 { 1, "In-Band Management"}, 524 { 2, "IPv6 unicast"}, 525 { 3, "Multicast"}, 526 { 4095, "Development, Experimental or Proprietary"}, 527 { 0, NULL } 528 }; 529 530 static const struct tok isis_iih_circuit_type_values[] = { 531 { 1, "Level 1 only"}, 532 { 2, "Level 2 only"}, 533 { 3, "Level 1, Level 2"}, 534 { 0, NULL} 535 }; 536 537 #define ISIS_LSP_TYPE_UNUSED0 0 538 #define ISIS_LSP_TYPE_LEVEL_1 1 539 #define ISIS_LSP_TYPE_UNUSED2 2 540 #define ISIS_LSP_TYPE_LEVEL_2 3 541 542 static const struct tok isis_lsp_istype_values[] = { 543 { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"}, 544 { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"}, 545 { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"}, 546 { ISIS_LSP_TYPE_LEVEL_2, "L2 IS"}, 547 { 0, NULL } 548 }; 549 550 /* 551 * Katz's point to point adjacency TLV uses codes to tell us the state of 552 * the remote adjacency. Enumerate them. 553 */ 554 555 #define ISIS_PTP_ADJ_UP 0 556 #define ISIS_PTP_ADJ_INIT 1 557 #define ISIS_PTP_ADJ_DOWN 2 558 559 static const struct tok isis_ptp_adjancey_values[] = { 560 { ISIS_PTP_ADJ_UP, "Up" }, 561 { ISIS_PTP_ADJ_INIT, "Initializing" }, 562 { ISIS_PTP_ADJ_DOWN, "Down" }, 563 { 0, NULL} 564 }; 565 566 struct isis_tlv_ptp_adj { 567 u_int8_t adjacency_state; 568 u_int8_t extd_local_circuit_id[4]; 569 u_int8_t neighbor_sysid[SYSTEM_ID_LEN]; 570 u_int8_t neighbor_extd_local_circuit_id[4]; 571 }; 572 573 static void osi_print_cksum(const u_int8_t *pptr, u_int16_t checksum, 574 u_int checksum_offset, u_int length); 575 static int clnp_print(const u_int8_t *, u_int); 576 static void esis_print(const u_int8_t *, u_int); 577 static int isis_print(const u_int8_t *, u_int); 578 579 struct isis_metric_block { 580 u_int8_t metric_default; 581 u_int8_t metric_delay; 582 u_int8_t metric_expense; 583 u_int8_t metric_error; 584 }; 585 586 struct isis_tlv_is_reach { 587 struct isis_metric_block isis_metric_block; 588 u_int8_t neighbor_nodeid[NODE_ID_LEN]; 589 }; 590 591 struct isis_tlv_es_reach { 592 struct isis_metric_block isis_metric_block; 593 u_int8_t neighbor_sysid[SYSTEM_ID_LEN]; 594 }; 595 596 struct isis_tlv_ip_reach { 597 struct isis_metric_block isis_metric_block; 598 u_int8_t prefix[4]; 599 u_int8_t mask[4]; 600 }; 601 602 static const struct tok isis_is_reach_virtual_values[] = { 603 { 0, "IsNotVirtual"}, 604 { 1, "IsVirtual"}, 605 { 0, NULL } 606 }; 607 608 static const struct tok isis_restart_flag_values[] = { 609 { 0x1, "Restart Request"}, 610 { 0x2, "Restart Acknowledgement"}, 611 { 0x4, "Suppress adjacency advertisement"}, 612 { 0, NULL } 613 }; 614 615 struct isis_common_header { 616 u_int8_t nlpid; 617 u_int8_t fixed_len; 618 u_int8_t version; /* Protocol version */ 619 u_int8_t id_length; 620 u_int8_t pdu_type; /* 3 MSbits are reserved */ 621 u_int8_t pdu_version; /* Packet format version */ 622 u_int8_t reserved; 623 u_int8_t max_area; 624 }; 625 626 struct isis_iih_lan_header { 627 u_int8_t circuit_type; 628 u_int8_t source_id[SYSTEM_ID_LEN]; 629 u_int8_t holding_time[2]; 630 u_int8_t pdu_len[2]; 631 u_int8_t priority; 632 u_int8_t lan_id[NODE_ID_LEN]; 633 }; 634 635 struct isis_iih_ptp_header { 636 u_int8_t circuit_type; 637 u_int8_t source_id[SYSTEM_ID_LEN]; 638 u_int8_t holding_time[2]; 639 u_int8_t pdu_len[2]; 640 u_int8_t circuit_id; 641 }; 642 643 struct isis_lsp_header { 644 u_int8_t pdu_len[2]; 645 u_int8_t remaining_lifetime[2]; 646 u_int8_t lsp_id[LSP_ID_LEN]; 647 u_int8_t sequence_number[4]; 648 u_int8_t checksum[2]; 649 u_int8_t typeblock; 650 }; 651 652 struct isis_csnp_header { 653 u_int8_t pdu_len[2]; 654 u_int8_t source_id[NODE_ID_LEN]; 655 u_int8_t start_lsp_id[LSP_ID_LEN]; 656 u_int8_t end_lsp_id[LSP_ID_LEN]; 657 }; 658 659 struct isis_psnp_header { 660 u_int8_t pdu_len[2]; 661 u_int8_t source_id[NODE_ID_LEN]; 662 }; 663 664 struct isis_tlv_lsp { 665 u_int8_t remaining_lifetime[2]; 666 u_int8_t lsp_id[LSP_ID_LEN]; 667 u_int8_t sequence_number[4]; 668 u_int8_t checksum[2]; 669 }; 670 671 #define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header)) 672 #define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header)) 673 #define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header)) 674 #define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header)) 675 #define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header)) 676 #define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header)) 677 678 void isoclns_print(const u_int8_t *p, u_int length, u_int caplen) 679 { 680 if (caplen <= 1) { /* enough bytes on the wire ? */ 681 printf("|OSI"); 682 return; 683 } 684 685 if (eflag) 686 printf("OSI NLPID %s (0x%02x): ", 687 tok2str(nlpid_values,"Unknown",*p), 688 *p); 689 690 switch (*p) { 691 692 case NLPID_CLNP: 693 if (!clnp_print(p, length)) 694 print_unknown_data(p,"\n\t",caplen); 695 break; 696 697 case NLPID_ESIS: 698 esis_print(p, length); 699 return; 700 701 case NLPID_ISIS: 702 if (!isis_print(p, length)) 703 print_unknown_data(p,"\n\t",caplen); 704 break; 705 706 case NLPID_NULLNS: 707 (void)printf("%slength: %u", 708 eflag ? "" : ", ", 709 length); 710 break; 711 712 case NLPID_Q933: 713 q933_print(p+1, length-1); 714 break; 715 716 case NLPID_IP: 717 ip_print(gndo, p+1, length-1); 718 break; 719 720 #ifdef INET6 721 case NLPID_IP6: 722 ip6_print(gndo, p+1, length-1); 723 break; 724 #endif 725 726 case NLPID_PPP: 727 ppp_print(p+1, length-1); 728 break; 729 730 default: 731 if (!eflag) 732 printf("OSI NLPID 0x%02x unknown",*p); 733 (void)printf("%slength: %u", 734 eflag ? "" : ", ", 735 length); 736 if (caplen > 1) 737 print_unknown_data(p,"\n\t",caplen); 738 break; 739 } 740 } 741 742 #define CLNP_PDU_ER 1 743 #define CLNP_PDU_DT 28 744 #define CLNP_PDU_MD 29 745 #define CLNP_PDU_ERQ 30 746 #define CLNP_PDU_ERP 31 747 748 static const struct tok clnp_pdu_values[] = { 749 { CLNP_PDU_ER, "Error Report"}, 750 { CLNP_PDU_MD, "MD"}, 751 { CLNP_PDU_DT, "Data"}, 752 { CLNP_PDU_ERQ, "Echo Request"}, 753 { CLNP_PDU_ERP, "Echo Response"}, 754 { 0, NULL } 755 }; 756 757 struct clnp_header_t { 758 u_int8_t nlpid; 759 u_int8_t length_indicator; 760 u_int8_t version; 761 u_int8_t lifetime; /* units of 500ms */ 762 u_int8_t type; 763 u_int8_t segment_length[2]; 764 u_int8_t cksum[2]; 765 }; 766 767 struct clnp_segment_header_t { 768 u_int8_t data_unit_id[2]; 769 u_int8_t segment_offset[2]; 770 u_int8_t total_length[2]; 771 }; 772 773 /* 774 * clnp_print 775 * Decode CLNP packets. Return 0 on error. 776 */ 777 778 static int clnp_print (const u_int8_t *pptr, u_int length) 779 { 780 const u_int8_t *optr,*source_address,*dest_address; 781 u_int li,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags; 782 const struct clnp_header_t *clnp_header; 783 const struct clnp_segment_header_t *clnp_segment_header; 784 u_int8_t rfd_error_major,rfd_error_minor; 785 786 clnp_header = (const struct clnp_header_t *) pptr; 787 TCHECK(*clnp_header); 788 789 li = clnp_header->length_indicator; 790 optr = pptr; 791 792 if (!eflag) 793 printf("CLNP"); 794 795 /* 796 * Sanity checking of the header. 797 */ 798 799 if (clnp_header->version != CLNP_VERSION) { 800 printf("version %d packet not supported", clnp_header->version); 801 return (0); 802 } 803 804 /* FIXME further header sanity checking */ 805 806 clnp_pdu_type = clnp_header->type & CLNP_PDU_TYPE_MASK; 807 clnp_flags = clnp_header->type & CLNP_FLAG_MASK; 808 809 pptr += sizeof(struct clnp_header_t); 810 li -= sizeof(struct clnp_header_t); 811 dest_address_length = *pptr; 812 dest_address = pptr + 1; 813 814 pptr += (1 + dest_address_length); 815 li -= (1 + dest_address_length); 816 source_address_length = *pptr; 817 source_address = pptr +1; 818 819 pptr += (1 + source_address_length); 820 li -= (1 + source_address_length); 821 822 if (vflag < 1) { 823 printf("%s%s > %s, %s, length %u", 824 eflag ? "" : ", ", 825 isonsap_string(source_address, source_address_length), 826 isonsap_string(dest_address, dest_address_length), 827 tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type), 828 length); 829 return (1); 830 } 831 printf("%slength %u",eflag ? "" : ", ",length); 832 833 printf("\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x", 834 tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type), 835 clnp_header->length_indicator, 836 clnp_header->version, 837 clnp_header->lifetime/2, 838 (clnp_header->lifetime%2)*5, 839 EXTRACT_16BITS(clnp_header->segment_length), 840 EXTRACT_16BITS(clnp_header->cksum)); 841 842 osi_print_cksum(optr, EXTRACT_16BITS(clnp_header->cksum), 7, 843 clnp_header->length_indicator); 844 845 printf("\n\tFlags [%s]", 846 bittok2str(clnp_flag_values,"none",clnp_flags)); 847 848 printf("\n\tsource address (length %u): %s\n\tdest address (length %u): %s", 849 source_address_length, 850 isonsap_string(source_address, source_address_length), 851 dest_address_length, 852 isonsap_string(dest_address,dest_address_length)); 853 854 if (clnp_flags & CLNP_SEGMENT_PART) { 855 clnp_segment_header = (const struct clnp_segment_header_t *) pptr; 856 TCHECK(*clnp_segment_header); 857 printf("\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u", 858 EXTRACT_16BITS(clnp_segment_header->data_unit_id), 859 EXTRACT_16BITS(clnp_segment_header->segment_offset), 860 EXTRACT_16BITS(clnp_segment_header->total_length)); 861 pptr+=sizeof(const struct clnp_segment_header_t); 862 li-=sizeof(const struct clnp_segment_header_t); 863 } 864 865 /* now walk the options */ 866 while (li >= 2) { 867 u_int op, opli; 868 const u_int8_t *tptr; 869 870 TCHECK2(*pptr, 2); 871 if (li < 2) { 872 printf(", bad opts/li"); 873 return (0); 874 } 875 op = *pptr++; 876 opli = *pptr++; 877 li -= 2; 878 TCHECK2(*pptr, opli); 879 if (opli > li) { 880 printf(", opt (%d) too long", op); 881 return (0); 882 } 883 li -= opli; 884 tptr = pptr; 885 tlen = opli; 886 887 printf("\n\t %s Option #%u, length %u, value: ", 888 tok2str(clnp_option_values,"Unknown",op), 889 op, 890 opli); 891 892 switch (op) { 893 894 895 case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */ 896 case CLNP_OPTION_SOURCE_ROUTING: 897 printf("%s %s", 898 tok2str(clnp_option_sr_rr_values,"Unknown",*tptr), 899 tok2str(clnp_option_sr_rr_string_values,"Unknown Option %u",op)); 900 nsap_offset=*(tptr+1); 901 if (nsap_offset == 0) { 902 printf(" Bad NSAP offset (0)"); 903 break; 904 } 905 nsap_offset-=1; /* offset to nsap list */ 906 if (nsap_offset > tlen) { 907 printf(" Bad NSAP offset (past end of option)"); 908 break; 909 } 910 tptr+=nsap_offset; 911 tlen-=nsap_offset; 912 while (tlen > 0) { 913 source_address_length=*tptr; 914 if (tlen < source_address_length+1) { 915 printf("\n\t NSAP address goes past end of option"); 916 break; 917 } 918 if (source_address_length > 0) { 919 source_address=(tptr+1); 920 TCHECK2(*source_address, source_address_length); 921 printf("\n\t NSAP address (length %u): %s", 922 source_address_length, 923 isonsap_string(source_address, source_address_length)); 924 } 925 tlen-=source_address_length+1; 926 } 927 break; 928 929 case CLNP_OPTION_PRIORITY: 930 printf("0x%1x", *tptr&0x0f); 931 break; 932 933 case CLNP_OPTION_QOS_MAINTENANCE: 934 printf("\n\t Format Code: %s", 935 tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK)); 936 937 if ((*tptr&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL) 938 printf("\n\t QoS Flags [%s]", 939 bittok2str(clnp_option_qos_global_values, 940 "none", 941 *tptr&CLNP_OPTION_OPTION_QOS_MASK)); 942 break; 943 944 case CLNP_OPTION_SECURITY: 945 printf("\n\t Format Code: %s, Security-Level %u", 946 tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK), 947 *(tptr+1)); 948 break; 949 950 case CLNP_OPTION_DISCARD_REASON: 951 rfd_error_major = (*tptr&0xf0) >> 4; 952 rfd_error_minor = *tptr&0x0f; 953 printf("\n\t Class: %s Error (0x%01x), %s (0x%01x)", 954 tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major), 955 rfd_error_major, 956 tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor), 957 rfd_error_minor); 958 break; 959 960 case CLNP_OPTION_PADDING: 961 printf("padding data"); 962 break; 963 964 /* 965 * FIXME those are the defined Options that lack a decoder 966 * you are welcome to contribute code ;-) 967 */ 968 969 default: 970 print_unknown_data(tptr,"\n\t ",opli); 971 break; 972 } 973 if (vflag > 1) 974 print_unknown_data(pptr,"\n\t ",opli); 975 pptr += opli; 976 } 977 978 switch (clnp_pdu_type) { 979 980 case CLNP_PDU_ER: /* fall through */ 981 case CLNP_PDU_ERP: 982 TCHECK(*pptr); 983 if (*(pptr) == NLPID_CLNP) { 984 printf("\n\t-----original packet-----\n\t"); 985 /* FIXME recursion protection */ 986 clnp_print(pptr, length-clnp_header->length_indicator); 987 break; 988 } 989 990 case CLNP_PDU_DT: 991 case CLNP_PDU_MD: 992 case CLNP_PDU_ERQ: 993 994 default: 995 /* dump the PDU specific data */ 996 if (length-(pptr-optr) > 0) { 997 printf("\n\t undecoded non-header data, length %u",length-clnp_header->length_indicator); 998 print_unknown_data(pptr,"\n\t ",length-(pptr-optr)); 999 } 1000 } 1001 1002 return (1); 1003 1004 trunc: 1005 fputs("[|clnp]", stdout); 1006 return (1); 1007 1008 } 1009 1010 1011 #define ESIS_PDU_REDIRECT 6 1012 #define ESIS_PDU_ESH 2 1013 #define ESIS_PDU_ISH 4 1014 1015 static const struct tok esis_pdu_values[] = { 1016 { ESIS_PDU_REDIRECT, "redirect"}, 1017 { ESIS_PDU_ESH, "ESH"}, 1018 { ESIS_PDU_ISH, "ISH"}, 1019 { 0, NULL } 1020 }; 1021 1022 struct esis_header_t { 1023 u_int8_t nlpid; 1024 u_int8_t length_indicator; 1025 u_int8_t version; 1026 u_int8_t reserved; 1027 u_int8_t type; 1028 u_int8_t holdtime[2]; 1029 u_int8_t cksum[2]; 1030 }; 1031 1032 static void 1033 esis_print(const u_int8_t *pptr, u_int length) 1034 { 1035 const u_int8_t *optr; 1036 u_int li,esis_pdu_type,source_address_length, source_address_number; 1037 const struct esis_header_t *esis_header; 1038 1039 if (!eflag) 1040 printf("ES-IS"); 1041 1042 if (length <= 2) { 1043 if (qflag) 1044 printf("bad pkt!"); 1045 else 1046 printf("no header at all!"); 1047 return; 1048 } 1049 1050 esis_header = (const struct esis_header_t *) pptr; 1051 TCHECK(*esis_header); 1052 li = esis_header->length_indicator; 1053 optr = pptr; 1054 1055 /* 1056 * Sanity checking of the header. 1057 */ 1058 1059 if (esis_header->nlpid != NLPID_ESIS) { 1060 printf(" nlpid 0x%02x packet not supported", esis_header->nlpid); 1061 return; 1062 } 1063 1064 if (esis_header->version != ESIS_VERSION) { 1065 printf(" version %d packet not supported", esis_header->version); 1066 return; 1067 } 1068 1069 if (li > length) { 1070 printf(" length indicator(%d) > PDU size (%d)!", li, length); 1071 return; 1072 } 1073 1074 if (li < sizeof(struct esis_header_t) + 2) { 1075 printf(" length indicator < min PDU size %d:", li); 1076 while (--length != 0) 1077 printf("%02X", *pptr++); 1078 return; 1079 } 1080 1081 esis_pdu_type = esis_header->type & ESIS_PDU_TYPE_MASK; 1082 1083 if (vflag < 1) { 1084 printf("%s%s, length %u", 1085 eflag ? "" : ", ", 1086 tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type), 1087 length); 1088 return; 1089 } else 1090 printf("%slength %u\n\t%s (%u)", 1091 eflag ? "" : ", ", 1092 length, 1093 tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type), 1094 esis_pdu_type); 1095 1096 printf(", v: %u%s", esis_header->version, esis_header->version == ESIS_VERSION ? "" : "unsupported" ); 1097 printf(", checksum: 0x%04x", EXTRACT_16BITS(esis_header->cksum)); 1098 1099 osi_print_cksum(pptr, EXTRACT_16BITS(esis_header->cksum), 7, li); 1100 1101 printf(", holding time: %us, length indicator: %u",EXTRACT_16BITS(esis_header->holdtime),li); 1102 1103 if (vflag > 1) 1104 print_unknown_data(optr,"\n\t",sizeof(struct esis_header_t)); 1105 1106 pptr += sizeof(struct esis_header_t); 1107 li -= sizeof(struct esis_header_t); 1108 1109 switch (esis_pdu_type) { 1110 case ESIS_PDU_REDIRECT: { 1111 const u_int8_t *dst, *snpa, *neta; 1112 u_int dstl, snpal, netal; 1113 1114 TCHECK(*pptr); 1115 if (li < 1) { 1116 printf(", bad redirect/li"); 1117 return; 1118 } 1119 dstl = *pptr; 1120 pptr++; 1121 li--; 1122 TCHECK2(*pptr, dstl); 1123 if (li < dstl) { 1124 printf(", bad redirect/li"); 1125 return; 1126 } 1127 dst = pptr; 1128 pptr += dstl; 1129 li -= dstl; 1130 printf("\n\t %s", isonsap_string(dst,dstl)); 1131 1132 TCHECK(*pptr); 1133 if (li < 1) { 1134 printf(", bad redirect/li"); 1135 return; 1136 } 1137 snpal = *pptr; 1138 pptr++; 1139 li--; 1140 TCHECK2(*pptr, snpal); 1141 if (li < snpal) { 1142 printf(", bad redirect/li"); 1143 return; 1144 } 1145 snpa = pptr; 1146 pptr += snpal; 1147 li -= snpal; 1148 TCHECK(*pptr); 1149 if (li < 1) { 1150 printf(", bad redirect/li"); 1151 return; 1152 } 1153 netal = *pptr; 1154 pptr++; 1155 TCHECK2(*pptr, netal); 1156 if (li < netal) { 1157 printf(", bad redirect/li"); 1158 return; 1159 } 1160 neta = pptr; 1161 pptr += netal; 1162 li -= netal; 1163 1164 if (netal == 0) 1165 printf("\n\t %s", etheraddr_string(snpa)); 1166 else 1167 printf("\n\t %s", isonsap_string(neta,netal)); 1168 break; 1169 } 1170 1171 case ESIS_PDU_ESH: 1172 TCHECK(*pptr); 1173 if (li < 1) { 1174 printf(", bad esh/li"); 1175 return; 1176 } 1177 source_address_number = *pptr; 1178 pptr++; 1179 li--; 1180 1181 printf("\n\t Number of Source Addresses: %u", source_address_number); 1182 1183 while (source_address_number > 0) { 1184 TCHECK(*pptr); 1185 if (li < 1) { 1186 printf(", bad esh/li"); 1187 return; 1188 } 1189 source_address_length = *pptr; 1190 pptr++; 1191 li--; 1192 1193 TCHECK2(*pptr, source_address_length); 1194 if (li < source_address_length) { 1195 printf(", bad esh/li"); 1196 return; 1197 } 1198 printf("\n\t NET (length: %u): %s", 1199 source_address_length, 1200 isonsap_string(pptr,source_address_length)); 1201 pptr += source_address_length; 1202 li -= source_address_length; 1203 source_address_number--; 1204 } 1205 1206 break; 1207 1208 case ESIS_PDU_ISH: { 1209 TCHECK(*pptr); 1210 if (li < 1) { 1211 printf(", bad ish/li"); 1212 return; 1213 } 1214 source_address_length = *pptr; 1215 pptr++; 1216 li--; 1217 TCHECK2(*pptr, source_address_length); 1218 if (li < source_address_length) { 1219 printf(", bad ish/li"); 1220 return; 1221 } 1222 printf("\n\t NET (length: %u): %s", source_address_length, isonsap_string(pptr, source_address_length)); 1223 pptr += source_address_length; 1224 li -= source_address_length; 1225 break; 1226 } 1227 1228 default: 1229 if (vflag <= 1) { 1230 if (pptr < snapend) 1231 print_unknown_data(pptr,"\n\t ",snapend-pptr); 1232 } 1233 return; 1234 } 1235 1236 /* now walk the options */ 1237 while (li != 0) { 1238 u_int op, opli; 1239 const u_int8_t *tptr; 1240 1241 if (li < 2) { 1242 printf(", bad opts/li"); 1243 return; 1244 } 1245 TCHECK2(*pptr, 2); 1246 op = *pptr++; 1247 opli = *pptr++; 1248 li -= 2; 1249 if (opli > li) { 1250 printf(", opt (%d) too long", op); 1251 return; 1252 } 1253 li -= opli; 1254 tptr = pptr; 1255 1256 printf("\n\t %s Option #%u, length %u, value: ", 1257 tok2str(esis_option_values,"Unknown",op), 1258 op, 1259 opli); 1260 1261 switch (op) { 1262 1263 case ESIS_OPTION_ES_CONF_TIME: 1264 if (opli == 2) { 1265 TCHECK2(*pptr, 2); 1266 printf("%us", EXTRACT_16BITS(tptr)); 1267 } else 1268 printf("(bad length)"); 1269 break; 1270 1271 case ESIS_OPTION_PROTOCOLS: 1272 while (opli>0) { 1273 TCHECK(*pptr); 1274 printf("%s (0x%02x)", 1275 tok2str(nlpid_values, 1276 "unknown", 1277 *tptr), 1278 *tptr); 1279 if (opli>1) /* further NPLIDs ? - put comma */ 1280 printf(", "); 1281 tptr++; 1282 opli--; 1283 } 1284 break; 1285 1286 /* 1287 * FIXME those are the defined Options that lack a decoder 1288 * you are welcome to contribute code ;-) 1289 */ 1290 1291 case ESIS_OPTION_QOS_MAINTENANCE: 1292 case ESIS_OPTION_SECURITY: 1293 case ESIS_OPTION_PRIORITY: 1294 case ESIS_OPTION_ADDRESS_MASK: 1295 case ESIS_OPTION_SNPA_MASK: 1296 1297 default: 1298 print_unknown_data(tptr,"\n\t ",opli); 1299 break; 1300 } 1301 if (vflag > 1) 1302 print_unknown_data(pptr,"\n\t ",opli); 1303 pptr += opli; 1304 } 1305 trunc: 1306 return; 1307 } 1308 1309 1310 static void 1311 isis_print_mcid (const struct isis_spb_mcid *mcid) 1312 { 1313 int i; 1314 1315 printf( "ID: %d, Name: ", mcid->format_id); 1316 1317 for(i=0; i<32; i++) 1318 { 1319 printf("%c", mcid->name[i]); 1320 if(mcid->name[i] == '\0') 1321 break; 1322 } 1323 1324 printf("\n\t Lvl: %d", 1325 EXTRACT_16BITS(mcid->revision_lvl)); 1326 1327 printf( ", Digest: "); 1328 1329 for(i=0;i<16;i++) 1330 printf("%.2x ",mcid->digest[i]); 1331 } 1332 1333 static int 1334 isis_print_mt_port_cap_subtlv (const u_int8_t *tptr, int len) 1335 { 1336 int stlv_type, stlv_len; 1337 const struct isis_subtlv_spb_mcid *subtlv_spb_mcid; 1338 int i; 1339 1340 while (len > 0) 1341 { 1342 stlv_type = *(tptr++); 1343 stlv_len = *(tptr++); 1344 1345 /* first lets see if we know the subTLVs name*/ 1346 printf("\n\t %s subTLV #%u, length: %u", 1347 tok2str(isis_mt_port_cap_subtlv_values, "unknown", stlv_type), 1348 stlv_type, 1349 stlv_len); 1350 1351 /*len -= TLV_TYPE_LEN_OFFSET;*/ 1352 len = len -2; 1353 1354 switch (stlv_type) 1355 { 1356 case ISIS_SUBTLV_SPB_MCID: 1357 { 1358 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_MCID_MIN_LEN)) 1359 goto trunctlv; 1360 1361 subtlv_spb_mcid = (struct isis_subtlv_spb_mcid *)tptr; 1362 1363 printf( "\n\t MCID: "); 1364 isis_print_mcid (&(subtlv_spb_mcid->mcid)); 1365 1366 /*tptr += SPB_MCID_MIN_LEN; 1367 len -= SPB_MCID_MIN_LEN; */ 1368 1369 printf( "\n\t AUX-MCID: "); 1370 isis_print_mcid (&(subtlv_spb_mcid->aux_mcid)); 1371 1372 /*tptr += SPB_MCID_MIN_LEN; 1373 len -= SPB_MCID_MIN_LEN; */ 1374 tptr = tptr + sizeof(struct isis_subtlv_spb_mcid); 1375 len = len - sizeof(struct isis_subtlv_spb_mcid); 1376 1377 break; 1378 } 1379 1380 case ISIS_SUBTLV_SPB_DIGEST: 1381 { 1382 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_DIGEST_MIN_LEN)) 1383 goto trunctlv; 1384 1385 printf ("\n\t RES: %d V: %d A: %d D: %d", 1386 (*(tptr) >> 5), (((*tptr)>> 4) & 0x01), 1387 ((*(tptr) >> 2) & 0x03), ((*tptr) & 0x03)); 1388 1389 tptr++; 1390 1391 printf( "\n\t Digest: "); 1392 1393 for(i=1;i<=8; i++) 1394 { 1395 printf("%08x ", EXTRACT_32BITS(tptr)); 1396 if (i%4 == 0 && i != 8) 1397 printf("\n\t "); 1398 tptr = tptr + 4; 1399 } 1400 1401 len = len - ISIS_SUBTLV_SPB_DIGEST_MIN_LEN; 1402 1403 break; 1404 } 1405 1406 case ISIS_SUBTLV_SPB_BVID: 1407 { 1408 if (!TTEST2(*(tptr), stlv_len)) 1409 goto trunctlv; 1410 1411 while (len) 1412 { 1413 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_BVID_MIN_LEN)) 1414 goto trunctlv; 1415 1416 printf("\n\t ECT: %08x", 1417 EXTRACT_32BITS(tptr)); 1418 1419 tptr = tptr+4; 1420 1421 printf(" BVID: %d, U:%01x M:%01x ", 1422 (EXTRACT_16BITS (tptr) >> 4) , 1423 (EXTRACT_16BITS (tptr) >> 3) & 0x01, 1424 (EXTRACT_16BITS (tptr) >> 2) & 0x01); 1425 1426 tptr = tptr + 2; 1427 len = len - ISIS_SUBTLV_SPB_BVID_MIN_LEN; 1428 } 1429 1430 break; 1431 } 1432 1433 default: 1434 break; 1435 } 1436 } 1437 1438 return 0; 1439 1440 trunctlv: 1441 printf("\n\t\t packet exceeded snapshot"); 1442 return(1); 1443 } 1444 1445 static int 1446 isis_print_mt_capability_subtlv (const u_int8_t *tptr, int len) 1447 { 1448 int stlv_type, stlv_len, tmp; 1449 1450 while (len > 0) 1451 { 1452 stlv_type = *(tptr++); 1453 stlv_len = *(tptr++); 1454 1455 /* first lets see if we know the subTLVs name*/ 1456 printf("\n\t %s subTLV #%u, length: %u", 1457 tok2str(isis_mt_capability_subtlv_values, "unknown", stlv_type), 1458 stlv_type, 1459 stlv_len); 1460 1461 len = len - 2; 1462 1463 switch (stlv_type) 1464 { 1465 case ISIS_SUBTLV_SPB_INSTANCE: 1466 1467 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN)) 1468 goto trunctlv; 1469 1470 printf("\n\t CIST Root-ID: %08x", EXTRACT_32BITS(tptr)); 1471 tptr = tptr+4; 1472 printf(" %08x", EXTRACT_32BITS(tptr)); 1473 tptr = tptr+4; 1474 printf(", Path Cost: %08x", EXTRACT_32BITS(tptr)); 1475 tptr = tptr+4; 1476 printf(", Prio: %d", EXTRACT_16BITS(tptr)); 1477 tptr = tptr + 2; 1478 printf("\n\t RES: %d", 1479 EXTRACT_16BITS(tptr) >> 5); 1480 printf(", V: %d", 1481 (EXTRACT_16BITS(tptr) >> 4) & 0x0001); 1482 printf(", SPSource-ID: %d", 1483 (EXTRACT_32BITS(tptr) & 0x000fffff)); 1484 tptr = tptr+4; 1485 printf(", No of Trees: %x", *(tptr)); 1486 1487 tmp = *(tptr++); 1488 1489 len = len - ISIS_SUBTLV_SPB_INSTANCE_MIN_LEN; 1490 1491 while (tmp) 1492 { 1493 if (!TTEST2(*(tptr), ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN)) 1494 goto trunctlv; 1495 1496 printf ("\n\t U:%d, M:%d, A:%d, RES:%d", 1497 *(tptr) >> 7, (*(tptr) >> 6) & 0x01, 1498 (*(tptr) >> 5) & 0x01, (*(tptr) & 0x1f)); 1499 1500 tptr++; 1501 1502 printf (", ECT: %08x", EXTRACT_32BITS(tptr)); 1503 1504 tptr = tptr + 4; 1505 1506 printf (", BVID: %d, SPVID: %d", 1507 (EXTRACT_24BITS(tptr) >> 12) & 0x000fff, 1508 EXTRACT_24BITS(tptr) & 0x000fff); 1509 1510 tptr = tptr + 3; 1511 len = len - ISIS_SUBTLV_SPB_INSTANCE_VLAN_TUPLE_LEN; 1512 tmp--; 1513 } 1514 1515 break; 1516 1517 case ISIS_SUBTLV_SPBM_SI: 1518 1519 if (!TTEST2(*(tptr), 6)) 1520 goto trunctlv; 1521 1522 printf("\n\t BMAC: %08x", EXTRACT_32BITS(tptr)); 1523 tptr = tptr+4; 1524 printf("%04x", EXTRACT_16BITS(tptr)); 1525 tptr = tptr+2; 1526 1527 printf (", RES: %d, VID: %d", EXTRACT_16BITS(tptr) >> 12, 1528 (EXTRACT_16BITS(tptr)) & 0x0fff); 1529 1530 tptr = tptr+2; 1531 len = len - 8; 1532 stlv_len = stlv_len - 8; 1533 1534 while (stlv_len) 1535 { 1536 printf("\n\t T: %d, R: %d, RES: %d, ISID: %d", 1537 (EXTRACT_32BITS(tptr) >> 31), 1538 (EXTRACT_32BITS(tptr) >> 30) & 0x01, 1539 (EXTRACT_32BITS(tptr) >> 24) & 0x03f, 1540 (EXTRACT_32BITS(tptr)) & 0x0ffffff); 1541 1542 tptr = tptr + 4; 1543 len = len - 4; 1544 stlv_len = stlv_len - 4; 1545 } 1546 1547 break; 1548 1549 default: 1550 break; 1551 } 1552 } 1553 return 0; 1554 1555 trunctlv: 1556 printf("\n\t\t packet exceeded snapshot"); 1557 return(1); 1558 } 1559 1560 1561 /* shared routine for printing system, node and lsp-ids */ 1562 static char * 1563 isis_print_id(const u_int8_t *cp, int id_len) 1564 { 1565 int i; 1566 static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")]; 1567 char *pos = id; 1568 1569 for (i = 1; i <= SYSTEM_ID_LEN; i++) { 1570 snprintf(pos, sizeof(id) - (pos - id), "%02x", *cp++); 1571 pos += strlen(pos); 1572 if (i == 2 || i == 4) 1573 *pos++ = '.'; 1574 } 1575 if (id_len >= NODE_ID_LEN) { 1576 snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++); 1577 pos += strlen(pos); 1578 } 1579 if (id_len == LSP_ID_LEN) 1580 snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp); 1581 return (id); 1582 } 1583 1584 /* print the 4-byte metric block which is common found in the old-style TLVs */ 1585 static int 1586 isis_print_metric_block (const struct isis_metric_block *isis_metric_block) 1587 { 1588 printf(", Default Metric: %d, %s", 1589 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default), 1590 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal"); 1591 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay)) 1592 printf("\n\t\t Delay Metric: %d, %s", 1593 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay), 1594 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal"); 1595 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense)) 1596 printf("\n\t\t Expense Metric: %d, %s", 1597 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense), 1598 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal"); 1599 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error)) 1600 printf("\n\t\t Error Metric: %d, %s", 1601 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error), 1602 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal"); 1603 1604 return(1); /* everything is ok */ 1605 } 1606 1607 static int 1608 isis_print_tlv_ip_reach (const u_int8_t *cp, const char *ident, int length) 1609 { 1610 int prefix_len; 1611 const struct isis_tlv_ip_reach *tlv_ip_reach; 1612 1613 tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp; 1614 1615 while (length > 0) { 1616 if ((size_t)length < sizeof(*tlv_ip_reach)) { 1617 printf("short IPv4 Reachability (%d vs %lu)", 1618 length, 1619 (unsigned long)sizeof(*tlv_ip_reach)); 1620 return (0); 1621 } 1622 1623 if (!TTEST(*tlv_ip_reach)) 1624 return (0); 1625 1626 prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask)); 1627 1628 if (prefix_len == -1) 1629 printf("%sIPv4 prefix: %s mask %s", 1630 ident, 1631 ipaddr_string((tlv_ip_reach->prefix)), 1632 ipaddr_string((tlv_ip_reach->mask))); 1633 else 1634 printf("%sIPv4 prefix: %15s/%u", 1635 ident, 1636 ipaddr_string((tlv_ip_reach->prefix)), 1637 prefix_len); 1638 1639 printf(", Distribution: %s, Metric: %u, %s", 1640 ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up", 1641 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default), 1642 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal"); 1643 1644 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay)) 1645 printf("%s Delay Metric: %u, %s", 1646 ident, 1647 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay), 1648 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal"); 1649 1650 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense)) 1651 printf("%s Expense Metric: %u, %s", 1652 ident, 1653 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense), 1654 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal"); 1655 1656 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error)) 1657 printf("%s Error Metric: %u, %s", 1658 ident, 1659 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error), 1660 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal"); 1661 1662 length -= sizeof(struct isis_tlv_ip_reach); 1663 tlv_ip_reach++; 1664 } 1665 return (1); 1666 } 1667 1668 /* 1669 * this is the common IP-REACH subTLV decoder it is called 1670 * from various EXTD-IP REACH TLVs (135,235,236,237) 1671 */ 1672 1673 static int 1674 isis_print_ip_reach_subtlv (const u_int8_t *tptr,int subt,int subl,const char *ident) { 1675 1676 /* first lets see if we know the subTLVs name*/ 1677 printf("%s%s subTLV #%u, length: %u", 1678 ident, 1679 tok2str(isis_ext_ip_reach_subtlv_values, 1680 "unknown", 1681 subt), 1682 subt, 1683 subl); 1684 1685 if (!TTEST2(*tptr,subl)) 1686 goto trunctlv; 1687 1688 switch(subt) { 1689 case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */ 1690 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32: 1691 while (subl >= 4) { 1692 printf(", 0x%08x (=%u)", 1693 EXTRACT_32BITS(tptr), 1694 EXTRACT_32BITS(tptr)); 1695 tptr+=4; 1696 subl-=4; 1697 } 1698 break; 1699 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64: 1700 while (subl >= 8) { 1701 printf(", 0x%08x%08x", 1702 EXTRACT_32BITS(tptr), 1703 EXTRACT_32BITS(tptr+4)); 1704 tptr+=8; 1705 subl-=8; 1706 } 1707 break; 1708 default: 1709 if(!print_unknown_data(tptr,"\n\t\t ", 1710 subl)) 1711 return(0); 1712 break; 1713 } 1714 return(1); 1715 1716 trunctlv: 1717 printf("%spacket exceeded snapshot",ident); 1718 return(0); 1719 } 1720 1721 /* 1722 * this is the common IS-REACH subTLV decoder it is called 1723 * from isis_print_ext_is_reach() 1724 */ 1725 1726 static int 1727 isis_print_is_reach_subtlv (const u_int8_t *tptr,u_int subt,u_int subl,const char *ident) { 1728 1729 u_int te_class,priority_level,gmpls_switch_cap; 1730 union { /* int to float conversion buffer for several subTLVs */ 1731 float f; 1732 u_int32_t i; 1733 } bw; 1734 1735 /* first lets see if we know the subTLVs name*/ 1736 printf("%s%s subTLV #%u, length: %u", 1737 ident, 1738 tok2str(isis_ext_is_reach_subtlv_values, 1739 "unknown", 1740 subt), 1741 subt, 1742 subl); 1743 1744 if (!TTEST2(*tptr,subl)) 1745 goto trunctlv; 1746 1747 switch(subt) { 1748 case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP: 1749 case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID: 1750 case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID: 1751 if (subl >= 4) { 1752 printf(", 0x%08x", EXTRACT_32BITS(tptr)); 1753 if (subl == 8) /* rfc4205 */ 1754 printf(", 0x%08x", EXTRACT_32BITS(tptr+4)); 1755 } 1756 break; 1757 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR: 1758 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR: 1759 if (subl >= sizeof(struct in_addr)) 1760 printf(", %s", ipaddr_string(tptr)); 1761 break; 1762 case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW : 1763 case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW: 1764 if (subl >= 4) { 1765 bw.i = EXTRACT_32BITS(tptr); 1766 printf(", %.3f Mbps", bw.f*8/1000000 ); 1767 } 1768 break; 1769 case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW : 1770 if (subl >= 32) { 1771 for (te_class = 0; te_class < 8; te_class++) { 1772 bw.i = EXTRACT_32BITS(tptr); 1773 printf("%s TE-Class %u: %.3f Mbps", 1774 ident, 1775 te_class, 1776 bw.f*8/1000000 ); 1777 tptr+=4; 1778 } 1779 } 1780 break; 1781 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */ 1782 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD: 1783 printf("%sBandwidth Constraints Model ID: %s (%u)", 1784 ident, 1785 tok2str(diffserv_te_bc_values, "unknown", *tptr), 1786 *tptr); 1787 tptr++; 1788 /* decode BCs until the subTLV ends */ 1789 for (te_class = 0; te_class < (subl-1)/4; te_class++) { 1790 bw.i = EXTRACT_32BITS(tptr); 1791 printf("%s Bandwidth constraint CT%u: %.3f Mbps", 1792 ident, 1793 te_class, 1794 bw.f*8/1000000 ); 1795 tptr+=4; 1796 } 1797 break; 1798 case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC: 1799 if (subl >= 3) 1800 printf(", %u", EXTRACT_24BITS(tptr)); 1801 break; 1802 case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE: 1803 if (subl == 2) { 1804 printf(", [ %s ] (0x%04x)", 1805 bittok2str(isis_subtlv_link_attribute_values, 1806 "Unknown", 1807 EXTRACT_16BITS(tptr)), 1808 EXTRACT_16BITS(tptr)); 1809 } 1810 break; 1811 case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE: 1812 if (subl >= 2) { 1813 printf(", %s, Priority %u", 1814 bittok2str(gmpls_link_prot_values, "none", *tptr), 1815 *(tptr+1)); 1816 } 1817 break; 1818 case ISIS_SUBTLV_SPB_METRIC: 1819 if (subl >= 6) { 1820 printf (", LM: %u", EXTRACT_24BITS(tptr)); 1821 tptr=tptr+3; 1822 printf (", P: %u", *(tptr)); 1823 printf (", P-ID: %u", EXTRACT_16BITS(++tptr)); 1824 } 1825 break; 1826 case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR: 1827 if (subl >= 36) { 1828 gmpls_switch_cap = *tptr; 1829 printf("%s Interface Switching Capability:%s", 1830 ident, 1831 tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap)); 1832 printf(", LSP Encoding: %s", 1833 tok2str(gmpls_encoding_values, "Unknown", *(tptr+1))); 1834 tptr+=4; 1835 printf("%s Max LSP Bandwidth:",ident); 1836 for (priority_level = 0; priority_level < 8; priority_level++) { 1837 bw.i = EXTRACT_32BITS(tptr); 1838 printf("%s priority level %d: %.3f Mbps", 1839 ident, 1840 priority_level, 1841 bw.f*8/1000000 ); 1842 tptr+=4; 1843 } 1844 subl-=36; 1845 switch (gmpls_switch_cap) { 1846 case GMPLS_PSC1: 1847 case GMPLS_PSC2: 1848 case GMPLS_PSC3: 1849 case GMPLS_PSC4: 1850 bw.i = EXTRACT_32BITS(tptr); 1851 printf("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f*8/1000000); 1852 printf("%s Interface MTU: %u", ident, EXTRACT_16BITS(tptr+4)); 1853 break; 1854 case GMPLS_TSC: 1855 bw.i = EXTRACT_32BITS(tptr); 1856 printf("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f*8/1000000); 1857 printf("%s Indication %s", ident, 1858 tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", *(tptr+4))); 1859 break; 1860 default: 1861 /* there is some optional stuff left to decode but this is as of yet 1862 not specified so just lets hexdump what is left */ 1863 if(subl>0){ 1864 if(!print_unknown_data(tptr,"\n\t\t ", 1865 subl)) 1866 return(0); 1867 } 1868 } 1869 } 1870 break; 1871 default: 1872 if(!print_unknown_data(tptr,"\n\t\t ", 1873 subl)) 1874 return(0); 1875 break; 1876 } 1877 return(1); 1878 1879 trunctlv: 1880 printf("%spacket exceeded snapshot",ident); 1881 return(0); 1882 } 1883 1884 1885 /* 1886 * this is the common IS-REACH decoder it is called 1887 * from various EXTD-IS REACH style TLVs (22,24,222) 1888 */ 1889 1890 static int 1891 isis_print_ext_is_reach (const u_int8_t *tptr,const char *ident, int tlv_type) { 1892 1893 char ident_buffer[20]; 1894 int subtlv_type,subtlv_len,subtlv_sum_len; 1895 int proc_bytes = 0; /* how many bytes did we process ? */ 1896 1897 if (!TTEST2(*tptr, NODE_ID_LEN)) 1898 return(0); 1899 1900 printf("%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN)); 1901 tptr+=(NODE_ID_LEN); 1902 1903 if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */ 1904 if (!TTEST2(*tptr, 3)) /* and is therefore skipped */ 1905 return(0); 1906 printf(", Metric: %d",EXTRACT_24BITS(tptr)); 1907 tptr+=3; 1908 } 1909 1910 if (!TTEST2(*tptr, 1)) 1911 return(0); 1912 subtlv_sum_len=*(tptr++); /* read out subTLV length */ 1913 proc_bytes=NODE_ID_LEN+3+1; 1914 printf(", %ssub-TLVs present",subtlv_sum_len ? "" : "no "); 1915 if (subtlv_sum_len) { 1916 printf(" (%u)",subtlv_sum_len); 1917 while (subtlv_sum_len>0) { 1918 if (!TTEST2(*tptr,2)) 1919 return(0); 1920 subtlv_type=*(tptr++); 1921 subtlv_len=*(tptr++); 1922 /* prepend the ident string */ 1923 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); 1924 if(!isis_print_is_reach_subtlv(tptr,subtlv_type,subtlv_len,ident_buffer)) 1925 return(0); 1926 tptr+=subtlv_len; 1927 subtlv_sum_len-=(subtlv_len+2); 1928 proc_bytes+=(subtlv_len+2); 1929 } 1930 } 1931 return(proc_bytes); 1932 } 1933 1934 /* 1935 * this is the common Multi Topology ID decoder 1936 * it is called from various MT-TLVs (222,229,235,237) 1937 */ 1938 1939 static int 1940 isis_print_mtid (const u_int8_t *tptr,const char *ident) { 1941 1942 if (!TTEST2(*tptr, 2)) 1943 return(0); 1944 1945 printf("%s%s", 1946 ident, 1947 tok2str(isis_mt_values, 1948 "Reserved for IETF Consensus", 1949 ISIS_MASK_MTID(EXTRACT_16BITS(tptr)))); 1950 1951 printf(" Topology (0x%03x), Flags: [%s]", 1952 ISIS_MASK_MTID(EXTRACT_16BITS(tptr)), 1953 bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_16BITS(tptr)))); 1954 1955 return(2); 1956 } 1957 1958 /* 1959 * this is the common extended IP reach decoder 1960 * it is called from TLVs (135,235,236,237) 1961 * we process the TLV and optional subTLVs and return 1962 * the amount of processed bytes 1963 */ 1964 1965 static int 1966 isis_print_extd_ip_reach (const u_int8_t *tptr, const char *ident, u_int16_t afi) { 1967 1968 char ident_buffer[20]; 1969 #ifdef INET6 1970 u_int8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */ 1971 #else 1972 u_int8_t prefix[sizeof(struct in_addr)]; /* shared copy buffer for IPv4 prefixes */ 1973 #endif 1974 u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen; 1975 1976 if (!TTEST2(*tptr, 4)) 1977 return (0); 1978 metric = EXTRACT_32BITS(tptr); 1979 processed=4; 1980 tptr+=4; 1981 1982 if (afi == AF_INET) { 1983 if (!TTEST2(*tptr, 1)) /* fetch status byte */ 1984 return (0); 1985 status_byte=*(tptr++); 1986 bit_length = status_byte&0x3f; 1987 if (bit_length > 32) { 1988 printf("%sIPv4 prefix: bad bit length %u", 1989 ident, 1990 bit_length); 1991 return (0); 1992 } 1993 processed++; 1994 #ifdef INET6 1995 } else if (afi == AF_INET6) { 1996 if (!TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */ 1997 return (0); 1998 status_byte=*(tptr++); 1999 bit_length=*(tptr++); 2000 if (bit_length > 128) { 2001 printf("%sIPv6 prefix: bad bit length %u", 2002 ident, 2003 bit_length); 2004 return (0); 2005 } 2006 processed+=2; 2007 #endif 2008 } else 2009 return (0); /* somebody is fooling us */ 2010 2011 byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */ 2012 2013 if (!TTEST2(*tptr, byte_length)) 2014 return (0); 2015 memset(prefix, 0, sizeof prefix); /* clear the copy buffer */ 2016 memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */ 2017 tptr+=byte_length; 2018 processed+=byte_length; 2019 2020 if (afi == AF_INET) 2021 printf("%sIPv4 prefix: %15s/%u", 2022 ident, 2023 ipaddr_string(prefix), 2024 bit_length); 2025 #ifdef INET6 2026 if (afi == AF_INET6) 2027 printf("%sIPv6 prefix: %s/%u", 2028 ident, 2029 ip6addr_string(prefix), 2030 bit_length); 2031 #endif 2032 2033 printf(", Distribution: %s, Metric: %u", 2034 ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up", 2035 metric); 2036 2037 if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) 2038 printf(", sub-TLVs present"); 2039 #ifdef INET6 2040 if (afi == AF_INET6) 2041 printf(", %s%s", 2042 ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal", 2043 ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : ""); 2044 #endif 2045 2046 if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) 2047 #ifdef INET6 2048 || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte)) 2049 #endif 2050 ) { 2051 /* assume that one prefix can hold more 2052 than one subTLV - therefore the first byte must reflect 2053 the aggregate bytecount of the subTLVs for this prefix 2054 */ 2055 if (!TTEST2(*tptr, 1)) 2056 return (0); 2057 sublen=*(tptr++); 2058 processed+=sublen+1; 2059 printf(" (%u)",sublen); /* print out subTLV length */ 2060 2061 while (sublen>0) { 2062 if (!TTEST2(*tptr,2)) 2063 return (0); 2064 subtlvtype=*(tptr++); 2065 subtlvlen=*(tptr++); 2066 /* prepend the ident string */ 2067 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); 2068 if(!isis_print_ip_reach_subtlv(tptr,subtlvtype,subtlvlen,ident_buffer)) 2069 return(0); 2070 tptr+=subtlvlen; 2071 sublen-=(subtlvlen+2); 2072 } 2073 } 2074 return (processed); 2075 } 2076 2077 /* 2078 * isis_print 2079 * Decode IS-IS packets. Return 0 on error. 2080 */ 2081 2082 static int isis_print (const u_int8_t *p, u_int length) 2083 { 2084 const struct isis_common_header *isis_header; 2085 2086 const struct isis_iih_lan_header *header_iih_lan; 2087 const struct isis_iih_ptp_header *header_iih_ptp; 2088 struct isis_lsp_header *header_lsp; 2089 const struct isis_csnp_header *header_csnp; 2090 const struct isis_psnp_header *header_psnp; 2091 2092 const struct isis_tlv_lsp *tlv_lsp; 2093 const struct isis_tlv_ptp_adj *tlv_ptp_adj; 2094 const struct isis_tlv_is_reach *tlv_is_reach; 2095 const struct isis_tlv_es_reach *tlv_es_reach; 2096 2097 u_int8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len; 2098 u_int8_t ext_is_len, ext_ip_len, mt_len; 2099 const u_int8_t *optr, *pptr, *tptr; 2100 u_short packet_len,pdu_len, key_id; 2101 u_int i,vendor_id; 2102 int sigcheck; 2103 2104 packet_len=length; 2105 optr = p; /* initialize the _o_riginal pointer to the packet start - 2106 need it for parsing the checksum TLV and authentication 2107 TLV verification */ 2108 isis_header = (const struct isis_common_header *)p; 2109 TCHECK(*isis_header); 2110 pptr = p+(ISIS_COMMON_HEADER_SIZE); 2111 header_iih_lan = (const struct isis_iih_lan_header *)pptr; 2112 header_iih_ptp = (const struct isis_iih_ptp_header *)pptr; 2113 header_lsp = (struct isis_lsp_header *)pptr; 2114 header_csnp = (const struct isis_csnp_header *)pptr; 2115 header_psnp = (const struct isis_psnp_header *)pptr; 2116 2117 if (!eflag) 2118 printf("IS-IS"); 2119 2120 /* 2121 * Sanity checking of the header. 2122 */ 2123 2124 if (isis_header->version != ISIS_VERSION) { 2125 printf("version %d packet not supported", isis_header->version); 2126 return (0); 2127 } 2128 2129 if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) { 2130 printf("system ID length of %d is not supported", 2131 isis_header->id_length); 2132 return (0); 2133 } 2134 2135 if (isis_header->pdu_version != ISIS_VERSION) { 2136 printf("version %d packet not supported", isis_header->pdu_version); 2137 return (0); 2138 } 2139 2140 max_area = isis_header->max_area; 2141 switch(max_area) { 2142 case 0: 2143 max_area = 3; /* silly shit */ 2144 break; 2145 case 255: 2146 printf("bad packet -- 255 areas"); 2147 return (0); 2148 default: 2149 break; 2150 } 2151 2152 id_length = isis_header->id_length; 2153 switch(id_length) { 2154 case 0: 2155 id_length = 6; /* silly shit again */ 2156 break; 2157 case 1: /* 1-8 are valid sys-ID lenghts */ 2158 case 2: 2159 case 3: 2160 case 4: 2161 case 5: 2162 case 6: 2163 case 7: 2164 case 8: 2165 break; 2166 case 255: 2167 id_length = 0; /* entirely useless */ 2168 break; 2169 default: 2170 break; 2171 } 2172 2173 /* toss any non 6-byte sys-ID len PDUs */ 2174 if (id_length != 6 ) { 2175 printf("bad packet -- illegal sys-ID length (%u)", id_length); 2176 return (0); 2177 } 2178 2179 pdu_type=isis_header->pdu_type; 2180 2181 /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/ 2182 if (vflag < 1) { 2183 printf("%s%s", 2184 eflag ? "" : ", ", 2185 tok2str(isis_pdu_values,"unknown PDU-Type %u",pdu_type)); 2186 2187 switch (pdu_type) { 2188 2189 case ISIS_PDU_L1_LAN_IIH: 2190 case ISIS_PDU_L2_LAN_IIH: 2191 printf(", src-id %s", 2192 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN)); 2193 printf(", lan-id %s, prio %u", 2194 isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN), 2195 header_iih_lan->priority); 2196 break; 2197 case ISIS_PDU_PTP_IIH: 2198 printf(", src-id %s", isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN)); 2199 break; 2200 case ISIS_PDU_L1_LSP: 2201 case ISIS_PDU_L2_LSP: 2202 printf(", lsp-id %s, seq 0x%08x, lifetime %5us", 2203 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), 2204 EXTRACT_32BITS(header_lsp->sequence_number), 2205 EXTRACT_16BITS(header_lsp->remaining_lifetime)); 2206 break; 2207 case ISIS_PDU_L1_CSNP: 2208 case ISIS_PDU_L2_CSNP: 2209 printf(", src-id %s", isis_print_id(header_csnp->source_id,NODE_ID_LEN)); 2210 break; 2211 case ISIS_PDU_L1_PSNP: 2212 case ISIS_PDU_L2_PSNP: 2213 printf(", src-id %s", isis_print_id(header_psnp->source_id,NODE_ID_LEN)); 2214 break; 2215 2216 } 2217 printf(", length %u", length); 2218 2219 return(1); 2220 } 2221 2222 /* ok they seem to want to know everything - lets fully decode it */ 2223 printf("%slength %u", eflag ? "" : ", ",length); 2224 2225 printf("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)", 2226 tok2str(isis_pdu_values, 2227 "unknown, type %u", 2228 pdu_type), 2229 isis_header->fixed_len, 2230 isis_header->version, 2231 isis_header->pdu_version, 2232 id_length, 2233 isis_header->id_length, 2234 max_area, 2235 isis_header->max_area); 2236 2237 if (vflag > 1) { 2238 if(!print_unknown_data(optr,"\n\t",8)) /* provide the _o_riginal pointer */ 2239 return(0); /* for optionally debugging the common header */ 2240 } 2241 2242 switch (pdu_type) { 2243 2244 case ISIS_PDU_L1_LAN_IIH: 2245 case ISIS_PDU_L2_LAN_IIH: 2246 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) { 2247 printf(", bogus fixed header length %u should be %lu", 2248 isis_header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE); 2249 return (0); 2250 } 2251 2252 pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len); 2253 if (packet_len>pdu_len) { 2254 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2255 length=pdu_len; 2256 } 2257 2258 TCHECK(*header_iih_lan); 2259 printf("\n\t source-id: %s, holding time: %us, Flags: [%s]", 2260 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN), 2261 EXTRACT_16BITS(header_iih_lan->holding_time), 2262 tok2str(isis_iih_circuit_type_values, 2263 "unknown circuit type 0x%02x", 2264 header_iih_lan->circuit_type)); 2265 2266 printf("\n\t lan-id: %s, Priority: %u, PDU length: %u", 2267 isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN), 2268 (header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK, 2269 pdu_len); 2270 2271 if (vflag > 1) { 2272 if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_LAN_HEADER_SIZE)) 2273 return(0); 2274 } 2275 2276 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); 2277 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); 2278 break; 2279 2280 case ISIS_PDU_PTP_IIH: 2281 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) { 2282 printf(", bogus fixed header length %u should be %lu", 2283 isis_header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE); 2284 return (0); 2285 } 2286 2287 pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len); 2288 if (packet_len>pdu_len) { 2289 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2290 length=pdu_len; 2291 } 2292 2293 TCHECK(*header_iih_ptp); 2294 printf("\n\t source-id: %s, holding time: %us, Flags: [%s]", 2295 isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN), 2296 EXTRACT_16BITS(header_iih_ptp->holding_time), 2297 tok2str(isis_iih_circuit_type_values, 2298 "unknown circuit type 0x%02x", 2299 header_iih_ptp->circuit_type)); 2300 2301 printf("\n\t circuit-id: 0x%02x, PDU length: %u", 2302 header_iih_ptp->circuit_id, 2303 pdu_len); 2304 2305 if (vflag > 1) { 2306 if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_PTP_HEADER_SIZE)) 2307 return(0); 2308 } 2309 2310 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); 2311 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); 2312 break; 2313 2314 case ISIS_PDU_L1_LSP: 2315 case ISIS_PDU_L2_LSP: 2316 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) { 2317 printf(", bogus fixed header length %u should be %lu", 2318 isis_header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE); 2319 return (0); 2320 } 2321 2322 pdu_len=EXTRACT_16BITS(header_lsp->pdu_len); 2323 if (packet_len>pdu_len) { 2324 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2325 length=pdu_len; 2326 } 2327 2328 TCHECK(*header_lsp); 2329 printf("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x", 2330 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), 2331 EXTRACT_32BITS(header_lsp->sequence_number), 2332 EXTRACT_16BITS(header_lsp->remaining_lifetime), 2333 EXTRACT_16BITS(header_lsp->checksum)); 2334 2335 2336 osi_print_cksum((u_int8_t *)header_lsp->lsp_id, 2337 EXTRACT_16BITS(header_lsp->checksum), 12, length-12); 2338 2339 /* 2340 * Clear checksum and lifetime prior to signature verification. 2341 */ 2342 header_lsp->checksum[0] = 0; 2343 header_lsp->checksum[1] = 0; 2344 header_lsp->remaining_lifetime[0] = 0; 2345 header_lsp->remaining_lifetime[1] = 0; 2346 2347 2348 printf(", PDU length: %u, Flags: [ %s", 2349 pdu_len, 2350 ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : ""); 2351 2352 if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) { 2353 printf("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : ""); 2354 printf("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : ""); 2355 printf("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : ""); 2356 printf("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : ""); 2357 printf("ATT bit set, "); 2358 } 2359 printf("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : ""); 2360 printf("%s ]", tok2str(isis_lsp_istype_values,"Unknown(0x%x)",ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock))); 2361 2362 if (vflag > 1) { 2363 if(!print_unknown_data(pptr,"\n\t ",ISIS_LSP_HEADER_SIZE)) 2364 return(0); 2365 } 2366 2367 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); 2368 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); 2369 break; 2370 2371 case ISIS_PDU_L1_CSNP: 2372 case ISIS_PDU_L2_CSNP: 2373 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) { 2374 printf(", bogus fixed header length %u should be %lu", 2375 isis_header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE); 2376 return (0); 2377 } 2378 2379 pdu_len=EXTRACT_16BITS(header_csnp->pdu_len); 2380 if (packet_len>pdu_len) { 2381 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2382 length=pdu_len; 2383 } 2384 2385 TCHECK(*header_csnp); 2386 printf("\n\t source-id: %s, PDU length: %u", 2387 isis_print_id(header_csnp->source_id, NODE_ID_LEN), 2388 pdu_len); 2389 printf("\n\t start lsp-id: %s", 2390 isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN)); 2391 printf("\n\t end lsp-id: %s", 2392 isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN)); 2393 2394 if (vflag > 1) { 2395 if(!print_unknown_data(pptr,"\n\t ",ISIS_CSNP_HEADER_SIZE)) 2396 return(0); 2397 } 2398 2399 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); 2400 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); 2401 break; 2402 2403 case ISIS_PDU_L1_PSNP: 2404 case ISIS_PDU_L2_PSNP: 2405 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) { 2406 printf("- bogus fixed header length %u should be %lu", 2407 isis_header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE); 2408 return (0); 2409 } 2410 2411 pdu_len=EXTRACT_16BITS(header_psnp->pdu_len); 2412 if (packet_len>pdu_len) { 2413 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2414 length=pdu_len; 2415 } 2416 2417 TCHECK(*header_psnp); 2418 printf("\n\t source-id: %s, PDU length: %u", 2419 isis_print_id(header_psnp->source_id, NODE_ID_LEN), 2420 pdu_len); 2421 2422 if (vflag > 1) { 2423 if(!print_unknown_data(pptr,"\n\t ",ISIS_PSNP_HEADER_SIZE)) 2424 return(0); 2425 } 2426 2427 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); 2428 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); 2429 break; 2430 2431 default: 2432 if(!print_unknown_data(pptr,"\n\t ",length)) 2433 return(0); 2434 return (0); 2435 } 2436 2437 /* 2438 * Now print the TLV's. 2439 */ 2440 2441 while (packet_len >= 2) { 2442 if (pptr == snapend) { 2443 return (1); 2444 } 2445 2446 if (!TTEST2(*pptr, 2)) { 2447 printf("\n\t\t packet exceeded snapshot (%ld) bytes", 2448 (long)(pptr-snapend)); 2449 return (1); 2450 } 2451 tlv_type = *pptr++; 2452 tlv_len = *pptr++; 2453 tmp =tlv_len; /* copy temporary len & pointer to packet data */ 2454 tptr = pptr; 2455 packet_len -= 2; 2456 if (tlv_len > packet_len) { 2457 break; 2458 } 2459 2460 /* first lets see if we know the TLVs name*/ 2461 printf("\n\t %s TLV #%u, length: %u", 2462 tok2str(isis_tlv_values, 2463 "unknown", 2464 tlv_type), 2465 tlv_type, 2466 tlv_len); 2467 2468 if (tlv_len == 0) /* something is malformed */ 2469 continue; 2470 2471 /* now check if we have a decoder otherwise do a hexdump at the end*/ 2472 switch (tlv_type) { 2473 case ISIS_TLV_AREA_ADDR: 2474 if (!TTEST2(*tptr, 1)) 2475 goto trunctlv; 2476 alen = *tptr++; 2477 while (tmp && alen < tmp) { 2478 printf("\n\t Area address (length: %u): %s", 2479 alen, 2480 isonsap_string(tptr,alen)); 2481 tptr += alen; 2482 tmp -= alen + 1; 2483 if (tmp==0) /* if this is the last area address do not attemt a boundary check */ 2484 break; 2485 if (!TTEST2(*tptr, 1)) 2486 goto trunctlv; 2487 alen = *tptr++; 2488 } 2489 break; 2490 case ISIS_TLV_ISNEIGH: 2491 while (tmp >= ETHER_ADDR_LEN) { 2492 if (!TTEST2(*tptr, ETHER_ADDR_LEN)) 2493 goto trunctlv; 2494 printf("\n\t SNPA: %s",isis_print_id(tptr,ETHER_ADDR_LEN)); 2495 tmp -= ETHER_ADDR_LEN; 2496 tptr += ETHER_ADDR_LEN; 2497 } 2498 break; 2499 2500 case ISIS_TLV_ISNEIGH_VARLEN: 2501 if (!TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */ 2502 goto trunctlv; 2503 lan_alen = *tptr++; /* LAN address length */ 2504 if (lan_alen == 0) { 2505 printf("\n\t LAN address length 0 bytes (invalid)"); 2506 break; 2507 } 2508 tmp --; 2509 printf("\n\t LAN address length %u bytes ",lan_alen); 2510 while (tmp >= lan_alen) { 2511 if (!TTEST2(*tptr, lan_alen)) 2512 goto trunctlv; 2513 printf("\n\t\tIS Neighbor: %s",isis_print_id(tptr,lan_alen)); 2514 tmp -= lan_alen; 2515 tptr +=lan_alen; 2516 } 2517 break; 2518 2519 case ISIS_TLV_PADDING: 2520 break; 2521 2522 case ISIS_TLV_MT_IS_REACH: 2523 mt_len = isis_print_mtid(tptr, "\n\t "); 2524 if (mt_len == 0) /* did something go wrong ? */ 2525 goto trunctlv; 2526 tptr+=mt_len; 2527 tmp-=mt_len; 2528 while (tmp >= 2+NODE_ID_LEN+3+1) { 2529 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); 2530 if (ext_is_len == 0) /* did something go wrong ? */ 2531 goto trunctlv; 2532 2533 tmp-=ext_is_len; 2534 tptr+=ext_is_len; 2535 } 2536 break; 2537 2538 case ISIS_TLV_IS_ALIAS_ID: 2539 while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */ 2540 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); 2541 if (ext_is_len == 0) /* did something go wrong ? */ 2542 goto trunctlv; 2543 tmp-=ext_is_len; 2544 tptr+=ext_is_len; 2545 } 2546 break; 2547 2548 case ISIS_TLV_EXT_IS_REACH: 2549 while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */ 2550 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); 2551 if (ext_is_len == 0) /* did something go wrong ? */ 2552 goto trunctlv; 2553 tmp-=ext_is_len; 2554 tptr+=ext_is_len; 2555 } 2556 break; 2557 case ISIS_TLV_IS_REACH: 2558 if (!TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */ 2559 goto trunctlv; 2560 printf("\n\t %s", 2561 tok2str(isis_is_reach_virtual_values, 2562 "bogus virtual flag 0x%02x", 2563 *tptr++)); 2564 tlv_is_reach = (const struct isis_tlv_is_reach *)tptr; 2565 while (tmp >= sizeof(struct isis_tlv_is_reach)) { 2566 if (!TTEST(*tlv_is_reach)) 2567 goto trunctlv; 2568 printf("\n\t IS Neighbor: %s", 2569 isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN)); 2570 isis_print_metric_block(&tlv_is_reach->isis_metric_block); 2571 tmp -= sizeof(struct isis_tlv_is_reach); 2572 tlv_is_reach++; 2573 } 2574 break; 2575 2576 case ISIS_TLV_ESNEIGH: 2577 tlv_es_reach = (const struct isis_tlv_es_reach *)tptr; 2578 while (tmp >= sizeof(struct isis_tlv_es_reach)) { 2579 if (!TTEST(*tlv_es_reach)) 2580 goto trunctlv; 2581 printf("\n\t ES Neighbor: %s", 2582 isis_print_id(tlv_es_reach->neighbor_sysid,SYSTEM_ID_LEN)); 2583 isis_print_metric_block(&tlv_es_reach->isis_metric_block); 2584 tmp -= sizeof(struct isis_tlv_es_reach); 2585 tlv_es_reach++; 2586 } 2587 break; 2588 2589 /* those two TLVs share the same format */ 2590 case ISIS_TLV_INT_IP_REACH: 2591 case ISIS_TLV_EXT_IP_REACH: 2592 if (!isis_print_tlv_ip_reach(pptr, "\n\t ", tlv_len)) 2593 return (1); 2594 break; 2595 2596 case ISIS_TLV_EXTD_IP_REACH: 2597 while (tmp>0) { 2598 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET); 2599 if (ext_ip_len == 0) /* did something go wrong ? */ 2600 goto trunctlv; 2601 tptr+=ext_ip_len; 2602 tmp-=ext_ip_len; 2603 } 2604 break; 2605 2606 case ISIS_TLV_MT_IP_REACH: 2607 mt_len = isis_print_mtid(tptr, "\n\t "); 2608 if (mt_len == 0) { /* did something go wrong ? */ 2609 goto trunctlv; 2610 } 2611 tptr+=mt_len; 2612 tmp-=mt_len; 2613 2614 while (tmp>0) { 2615 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET); 2616 if (ext_ip_len == 0) /* did something go wrong ? */ 2617 goto trunctlv; 2618 tptr+=ext_ip_len; 2619 tmp-=ext_ip_len; 2620 } 2621 break; 2622 2623 #ifdef INET6 2624 case ISIS_TLV_IP6_REACH: 2625 while (tmp>0) { 2626 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET6); 2627 if (ext_ip_len == 0) /* did something go wrong ? */ 2628 goto trunctlv; 2629 tptr+=ext_ip_len; 2630 tmp-=ext_ip_len; 2631 } 2632 break; 2633 2634 case ISIS_TLV_MT_IP6_REACH: 2635 mt_len = isis_print_mtid(tptr, "\n\t "); 2636 if (mt_len == 0) { /* did something go wrong ? */ 2637 goto trunctlv; 2638 } 2639 tptr+=mt_len; 2640 tmp-=mt_len; 2641 2642 while (tmp>0) { 2643 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET6); 2644 if (ext_ip_len == 0) /* did something go wrong ? */ 2645 goto trunctlv; 2646 tptr+=ext_ip_len; 2647 tmp-=ext_ip_len; 2648 } 2649 break; 2650 2651 case ISIS_TLV_IP6ADDR: 2652 while (tmp>=sizeof(struct in6_addr)) { 2653 if (!TTEST2(*tptr, sizeof(struct in6_addr))) 2654 goto trunctlv; 2655 2656 printf("\n\t IPv6 interface address: %s", 2657 ip6addr_string(tptr)); 2658 2659 tptr += sizeof(struct in6_addr); 2660 tmp -= sizeof(struct in6_addr); 2661 } 2662 break; 2663 #endif 2664 case ISIS_TLV_AUTH: 2665 if (!TTEST2(*tptr, 1)) 2666 goto trunctlv; 2667 2668 printf("\n\t %s: ", 2669 tok2str(isis_subtlv_auth_values, 2670 "unknown Authentication type 0x%02x", 2671 *tptr)); 2672 2673 switch (*tptr) { 2674 case ISIS_SUBTLV_AUTH_SIMPLE: 2675 for(i=1;i<tlv_len;i++) { 2676 if (!TTEST2(*(tptr+i), 1)) 2677 goto trunctlv; 2678 printf("%c",*(tptr+i)); 2679 } 2680 break; 2681 case ISIS_SUBTLV_AUTH_MD5: 2682 for(i=1;i<tlv_len;i++) { 2683 if (!TTEST2(*(tptr+i), 1)) 2684 goto trunctlv; 2685 printf("%02x",*(tptr+i)); 2686 } 2687 if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1) 2688 printf(", (malformed subTLV) "); 2689 2690 #ifdef HAVE_LIBCRYPTO 2691 sigcheck = signature_verify(optr, length, 2692 (unsigned char *)tptr + 1); 2693 #else 2694 sigcheck = CANT_CHECK_SIGNATURE; 2695 #endif 2696 printf(" (%s)", tok2str(signature_check_values, "Unknown", sigcheck)); 2697 2698 break; 2699 case ISIS_SUBTLV_AUTH_GENERIC: 2700 key_id = EXTRACT_16BITS((tptr+1)); 2701 printf("%u, password: ", key_id); 2702 for(i=1 + sizeof(u_int16_t);i<tlv_len;i++) { 2703 if (!TTEST2(*(tptr+i), 1)) 2704 goto trunctlv; 2705 printf("%02x",*(tptr+i)); 2706 } 2707 break; 2708 case ISIS_SUBTLV_AUTH_PRIVATE: 2709 default: 2710 if(!print_unknown_data(tptr+1,"\n\t\t ",tlv_len-1)) 2711 return(0); 2712 break; 2713 } 2714 break; 2715 2716 case ISIS_TLV_PTP_ADJ: 2717 tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr; 2718 if(tmp>=1) { 2719 if (!TTEST2(*tptr, 1)) 2720 goto trunctlv; 2721 printf("\n\t Adjacency State: %s (%u)", 2722 tok2str(isis_ptp_adjancey_values, "unknown", *tptr), 2723 *tptr); 2724 tmp--; 2725 } 2726 if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) { 2727 if (!TTEST2(tlv_ptp_adj->extd_local_circuit_id, 2728 sizeof(tlv_ptp_adj->extd_local_circuit_id))) 2729 goto trunctlv; 2730 printf("\n\t Extended Local circuit-ID: 0x%08x", 2731 EXTRACT_32BITS(tlv_ptp_adj->extd_local_circuit_id)); 2732 tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id); 2733 } 2734 if(tmp>=SYSTEM_ID_LEN) { 2735 if (!TTEST2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN)) 2736 goto trunctlv; 2737 printf("\n\t Neighbor System-ID: %s", 2738 isis_print_id(tlv_ptp_adj->neighbor_sysid,SYSTEM_ID_LEN)); 2739 tmp-=SYSTEM_ID_LEN; 2740 } 2741 if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) { 2742 if (!TTEST2(tlv_ptp_adj->neighbor_extd_local_circuit_id, 2743 sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id))) 2744 goto trunctlv; 2745 printf("\n\t Neighbor Extended Local circuit-ID: 0x%08x", 2746 EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id)); 2747 } 2748 break; 2749 2750 case ISIS_TLV_PROTOCOLS: 2751 printf("\n\t NLPID(s): "); 2752 while (tmp>0) { 2753 if (!TTEST2(*(tptr), 1)) 2754 goto trunctlv; 2755 printf("%s (0x%02x)", 2756 tok2str(nlpid_values, 2757 "unknown", 2758 *tptr), 2759 *tptr); 2760 if (tmp>1) /* further NPLIDs ? - put comma */ 2761 printf(", "); 2762 tptr++; 2763 tmp--; 2764 } 2765 break; 2766 2767 case ISIS_TLV_MT_PORT_CAP: 2768 { 2769 if (!TTEST2(*(tptr), 2)) 2770 goto trunctlv; 2771 2772 printf("\n\t RES: %d, MTID(s): %d", 2773 (EXTRACT_16BITS (tptr) >> 12), 2774 (EXTRACT_16BITS (tptr) & 0x0fff)); 2775 2776 tmp = tmp-2; 2777 tptr = tptr+2; 2778 2779 if (tmp) 2780 isis_print_mt_port_cap_subtlv (tptr, tmp); 2781 2782 break; 2783 } 2784 2785 case ISIS_TLV_MT_CAPABILITY: 2786 2787 if (!TTEST2(*(tptr), 2)) 2788 goto trunctlv; 2789 2790 printf("\n\t O: %d, RES: %d, MTID(s): %d", 2791 (EXTRACT_16BITS(tptr) >> 15) & 0x01, 2792 (EXTRACT_16BITS(tptr) >> 12) & 0x07, 2793 EXTRACT_16BITS(tptr) & 0x0fff); 2794 2795 tmp = tmp-2; 2796 tptr = tptr+2; 2797 2798 if (tmp) 2799 isis_print_mt_capability_subtlv (tptr, tmp); 2800 2801 break; 2802 2803 case ISIS_TLV_TE_ROUTER_ID: 2804 if (!TTEST2(*pptr, sizeof(struct in_addr))) 2805 goto trunctlv; 2806 printf("\n\t Traffic Engineering Router ID: %s", ipaddr_string(pptr)); 2807 break; 2808 2809 case ISIS_TLV_IPADDR: 2810 while (tmp>=sizeof(struct in_addr)) { 2811 if (!TTEST2(*tptr, sizeof(struct in_addr))) 2812 goto trunctlv; 2813 printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr)); 2814 tptr += sizeof(struct in_addr); 2815 tmp -= sizeof(struct in_addr); 2816 } 2817 break; 2818 2819 case ISIS_TLV_HOSTNAME: 2820 printf("\n\t Hostname: "); 2821 while (tmp>0) { 2822 if (!TTEST2(*tptr, 1)) 2823 goto trunctlv; 2824 printf("%c",*tptr++); 2825 tmp--; 2826 } 2827 break; 2828 2829 case ISIS_TLV_SHARED_RISK_GROUP: 2830 if (tmp < NODE_ID_LEN) 2831 break; 2832 if (!TTEST2(*tptr, NODE_ID_LEN)) 2833 goto trunctlv; 2834 printf("\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN)); 2835 tptr+=(NODE_ID_LEN); 2836 tmp-=(NODE_ID_LEN); 2837 2838 if (tmp < 1) 2839 break; 2840 if (!TTEST2(*tptr, 1)) 2841 goto trunctlv; 2842 printf(", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered"); 2843 tmp--; 2844 2845 if (tmp < sizeof(struct in_addr)) 2846 break; 2847 if (!TTEST2(*tptr,sizeof(struct in_addr))) 2848 goto trunctlv; 2849 printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr)); 2850 tptr+=sizeof(struct in_addr); 2851 tmp-=sizeof(struct in_addr); 2852 2853 if (tmp < sizeof(struct in_addr)) 2854 break; 2855 if (!TTEST2(*tptr,sizeof(struct in_addr))) 2856 goto trunctlv; 2857 printf("\n\t IPv4 neighbor address: %s", ipaddr_string(tptr)); 2858 tptr+=sizeof(struct in_addr); 2859 tmp-=sizeof(struct in_addr); 2860 2861 while (tmp>=4) { 2862 if (!TTEST2(*tptr, 4)) 2863 goto trunctlv; 2864 printf("\n\t Link-ID: 0x%08x", EXTRACT_32BITS(tptr)); 2865 tptr+=4; 2866 tmp-=4; 2867 } 2868 break; 2869 2870 case ISIS_TLV_LSP: 2871 tlv_lsp = (const struct isis_tlv_lsp *)tptr; 2872 while(tmp>=sizeof(struct isis_tlv_lsp)) { 2873 if (!TTEST((tlv_lsp->lsp_id)[LSP_ID_LEN-1])) 2874 goto trunctlv; 2875 printf("\n\t lsp-id: %s", 2876 isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN)); 2877 if (!TTEST2(tlv_lsp->sequence_number, 4)) 2878 goto trunctlv; 2879 printf(", seq: 0x%08x",EXTRACT_32BITS(tlv_lsp->sequence_number)); 2880 if (!TTEST2(tlv_lsp->remaining_lifetime, 2)) 2881 goto trunctlv; 2882 printf(", lifetime: %5ds",EXTRACT_16BITS(tlv_lsp->remaining_lifetime)); 2883 if (!TTEST2(tlv_lsp->checksum, 2)) 2884 goto trunctlv; 2885 printf(", chksum: 0x%04x",EXTRACT_16BITS(tlv_lsp->checksum)); 2886 tmp-=sizeof(struct isis_tlv_lsp); 2887 tlv_lsp++; 2888 } 2889 break; 2890 2891 case ISIS_TLV_CHECKSUM: 2892 if (tmp < ISIS_TLV_CHECKSUM_MINLEN) 2893 break; 2894 if (!TTEST2(*tptr, ISIS_TLV_CHECKSUM_MINLEN)) 2895 goto trunctlv; 2896 printf("\n\t checksum: 0x%04x ", EXTRACT_16BITS(tptr)); 2897 /* do not attempt to verify the checksum if it is zero 2898 * most likely a HMAC-MD5 TLV is also present and 2899 * to avoid conflicts the checksum TLV is zeroed. 2900 * see rfc3358 for details 2901 */ 2902 osi_print_cksum(optr, EXTRACT_16BITS(tptr), tptr-optr, length); 2903 break; 2904 2905 case ISIS_TLV_MT_SUPPORTED: 2906 if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN) 2907 break; 2908 while (tmp>1) { 2909 /* length can only be a multiple of 2, otherwise there is 2910 something broken -> so decode down until length is 1 */ 2911 if (tmp!=1) { 2912 mt_len = isis_print_mtid(tptr, "\n\t "); 2913 if (mt_len == 0) /* did something go wrong ? */ 2914 goto trunctlv; 2915 tptr+=mt_len; 2916 tmp-=mt_len; 2917 } else { 2918 printf("\n\t malformed MT-ID"); 2919 break; 2920 } 2921 } 2922 break; 2923 2924 case ISIS_TLV_RESTART_SIGNALING: 2925 /* first attempt to decode the flags */ 2926 if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN) 2927 break; 2928 if (!TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN)) 2929 goto trunctlv; 2930 printf("\n\t Flags [%s]", 2931 bittok2str(isis_restart_flag_values, "none", *tptr)); 2932 tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; 2933 tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; 2934 2935 /* is there anything other than the flags field? */ 2936 if (tmp == 0) 2937 break; 2938 2939 if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN) 2940 break; 2941 if (!TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)) 2942 goto trunctlv; 2943 2944 printf(", Remaining holding time %us", EXTRACT_16BITS(tptr)); 2945 tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; 2946 tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; 2947 2948 /* is there an additional sysid field present ?*/ 2949 if (tmp == SYSTEM_ID_LEN) { 2950 if (!TTEST2(*tptr, SYSTEM_ID_LEN)) 2951 goto trunctlv; 2952 printf(", for %s",isis_print_id(tptr,SYSTEM_ID_LEN)); 2953 } 2954 break; 2955 2956 case ISIS_TLV_IDRP_INFO: 2957 if (tmp < ISIS_TLV_IDRP_INFO_MINLEN) 2958 break; 2959 if (!TTEST2(*tptr, ISIS_TLV_IDRP_INFO_MINLEN)) 2960 goto trunctlv; 2961 printf("\n\t Inter-Domain Information Type: %s", 2962 tok2str(isis_subtlv_idrp_values, 2963 "Unknown (0x%02x)", 2964 *tptr)); 2965 switch (*tptr++) { 2966 case ISIS_SUBTLV_IDRP_ASN: 2967 if (!TTEST2(*tptr, 2)) /* fetch AS number */ 2968 goto trunctlv; 2969 printf("AS Number: %u",EXTRACT_16BITS(tptr)); 2970 break; 2971 case ISIS_SUBTLV_IDRP_LOCAL: 2972 case ISIS_SUBTLV_IDRP_RES: 2973 default: 2974 if(!print_unknown_data(tptr,"\n\t ",tlv_len-1)) 2975 return(0); 2976 break; 2977 } 2978 break; 2979 2980 case ISIS_TLV_LSP_BUFFERSIZE: 2981 if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN) 2982 break; 2983 if (!TTEST2(*tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN)) 2984 goto trunctlv; 2985 printf("\n\t LSP Buffersize: %u",EXTRACT_16BITS(tptr)); 2986 break; 2987 2988 case ISIS_TLV_PART_DIS: 2989 while (tmp >= SYSTEM_ID_LEN) { 2990 if (!TTEST2(*tptr, SYSTEM_ID_LEN)) 2991 goto trunctlv; 2992 printf("\n\t %s",isis_print_id(tptr,SYSTEM_ID_LEN)); 2993 tptr+=SYSTEM_ID_LEN; 2994 tmp-=SYSTEM_ID_LEN; 2995 } 2996 break; 2997 2998 case ISIS_TLV_PREFIX_NEIGH: 2999 if (tmp < sizeof(struct isis_metric_block)) 3000 break; 3001 if (!TTEST2(*tptr, sizeof(struct isis_metric_block))) 3002 goto trunctlv; 3003 printf("\n\t Metric Block"); 3004 isis_print_metric_block((const struct isis_metric_block *)tptr); 3005 tptr+=sizeof(struct isis_metric_block); 3006 tmp-=sizeof(struct isis_metric_block); 3007 3008 while(tmp>0) { 3009 if (!TTEST2(*tptr, 1)) 3010 goto trunctlv; 3011 prefix_len=*tptr++; /* read out prefix length in semioctets*/ 3012 if (prefix_len < 2) { 3013 printf("\n\t\tAddress: prefix length %u < 2", prefix_len); 3014 break; 3015 } 3016 tmp--; 3017 if (tmp < prefix_len/2) 3018 break; 3019 if (!TTEST2(*tptr, prefix_len/2)) 3020 goto trunctlv; 3021 printf("\n\t\tAddress: %s/%u", 3022 isonsap_string(tptr,prefix_len/2), 3023 prefix_len*4); 3024 tptr+=prefix_len/2; 3025 tmp-=prefix_len/2; 3026 } 3027 break; 3028 3029 case ISIS_TLV_IIH_SEQNR: 3030 if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN) 3031 break; 3032 if (!TTEST2(*tptr, ISIS_TLV_IIH_SEQNR_MINLEN)) /* check if four bytes are on the wire */ 3033 goto trunctlv; 3034 printf("\n\t Sequence number: %u", EXTRACT_32BITS(tptr) ); 3035 break; 3036 3037 case ISIS_TLV_VENDOR_PRIVATE: 3038 if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN) 3039 break; 3040 if (!TTEST2(*tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN)) /* check if enough byte for a full oui */ 3041 goto trunctlv; 3042 vendor_id = EXTRACT_24BITS(tptr); 3043 printf("\n\t Vendor: %s (%u)", 3044 tok2str(oui_values,"Unknown",vendor_id), 3045 vendor_id); 3046 tptr+=3; 3047 tmp-=3; 3048 if (tmp > 0) /* hexdump the rest */ 3049 if(!print_unknown_data(tptr,"\n\t\t",tmp)) 3050 return(0); 3051 break; 3052 /* 3053 * FIXME those are the defined TLVs that lack a decoder 3054 * you are welcome to contribute code ;-) 3055 */ 3056 3057 case ISIS_TLV_DECNET_PHASE4: 3058 case ISIS_TLV_LUCENT_PRIVATE: 3059 case ISIS_TLV_IPAUTH: 3060 case ISIS_TLV_NORTEL_PRIVATE1: 3061 case ISIS_TLV_NORTEL_PRIVATE2: 3062 3063 default: 3064 if (vflag <= 1) { 3065 if(!print_unknown_data(pptr,"\n\t\t",tlv_len)) 3066 return(0); 3067 } 3068 break; 3069 } 3070 /* do we want to see an additionally hexdump ? */ 3071 if (vflag> 1) { 3072 if(!print_unknown_data(pptr,"\n\t ",tlv_len)) 3073 return(0); 3074 } 3075 3076 pptr += tlv_len; 3077 packet_len -= tlv_len; 3078 } 3079 3080 if (packet_len != 0) { 3081 printf("\n\t %u straggler bytes", packet_len); 3082 } 3083 return (1); 3084 3085 trunc: 3086 fputs("[|isis]", stdout); 3087 return (1); 3088 3089 trunctlv: 3090 printf("\n\t\t packet exceeded snapshot"); 3091 return(1); 3092 } 3093 3094 static void 3095 osi_print_cksum (const u_int8_t *pptr, u_int16_t checksum, 3096 u_int checksum_offset, u_int length) 3097 { 3098 u_int16_t calculated_checksum; 3099 3100 /* do not attempt to verify the checksum if it is zero */ 3101 if (!checksum) { 3102 printf("(unverified)"); 3103 } else { 3104 calculated_checksum = create_osi_cksum(pptr, checksum_offset, length); 3105 if (checksum == calculated_checksum) { 3106 printf(" (correct)"); 3107 } else { 3108 printf(" (incorrect should be 0x%04x)", calculated_checksum); 3109 } 3110 } 3111 } 3112 3113 /* 3114 * Local Variables: 3115 * c-style: whitesmith 3116 * c-basic-offset: 8 3117 * End: 3118 */ 3119