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