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 1.163 2007-03-02 09:16:19 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 52 /* 53 * IS-IS is defined in ISO 10589. Look there for protocol definitions. 54 */ 55 56 #define SYSTEM_ID_LEN ETHER_ADDR_LEN 57 #define NODE_ID_LEN SYSTEM_ID_LEN+1 58 #define LSP_ID_LEN SYSTEM_ID_LEN+2 59 60 #define ISIS_VERSION 1 61 #define ESIS_VERSION 1 62 #define CLNP_VERSION 1 63 64 #define ISIS_PDU_TYPE_MASK 0x1F 65 #define ESIS_PDU_TYPE_MASK 0x1F 66 #define CLNP_PDU_TYPE_MASK 0x1F 67 #define CLNP_FLAG_MASK 0xE0 68 #define ISIS_LAN_PRIORITY_MASK 0x7F 69 70 #define ISIS_PDU_L1_LAN_IIH 15 71 #define ISIS_PDU_L2_LAN_IIH 16 72 #define ISIS_PDU_PTP_IIH 17 73 #define ISIS_PDU_L1_LSP 18 74 #define ISIS_PDU_L2_LSP 20 75 #define ISIS_PDU_L1_CSNP 24 76 #define ISIS_PDU_L2_CSNP 25 77 #define ISIS_PDU_L1_PSNP 26 78 #define ISIS_PDU_L2_PSNP 27 79 80 static struct tok isis_pdu_values[] = { 81 { ISIS_PDU_L1_LAN_IIH, "L1 Lan IIH"}, 82 { ISIS_PDU_L2_LAN_IIH, "L2 Lan IIH"}, 83 { ISIS_PDU_PTP_IIH, "p2p IIH"}, 84 { ISIS_PDU_L1_LSP, "L1 LSP"}, 85 { ISIS_PDU_L2_LSP, "L2 LSP"}, 86 { ISIS_PDU_L1_CSNP, "L1 CSNP"}, 87 { ISIS_PDU_L2_CSNP, "L2 CSNP"}, 88 { ISIS_PDU_L1_PSNP, "L1 PSNP"}, 89 { ISIS_PDU_L2_PSNP, "L2 PSNP"}, 90 { 0, NULL} 91 }; 92 93 /* 94 * A TLV is a tuple of a type, length and a value and is normally used for 95 * encoding information in all sorts of places. This is an enumeration of 96 * the well known types. 97 * 98 * list taken from rfc3359 plus some memory from veterans ;-) 99 */ 100 101 #define ISIS_TLV_AREA_ADDR 1 /* iso10589 */ 102 #define ISIS_TLV_IS_REACH 2 /* iso10589 */ 103 #define ISIS_TLV_ESNEIGH 3 /* iso10589 */ 104 #define ISIS_TLV_PART_DIS 4 /* iso10589 */ 105 #define ISIS_TLV_PREFIX_NEIGH 5 /* iso10589 */ 106 #define ISIS_TLV_ISNEIGH 6 /* iso10589 */ 107 #define ISIS_TLV_ISNEIGH_VARLEN 7 /* iso10589 */ 108 #define ISIS_TLV_PADDING 8 /* iso10589 */ 109 #define ISIS_TLV_LSP 9 /* iso10589 */ 110 #define ISIS_TLV_AUTH 10 /* iso10589, rfc3567 */ 111 #define ISIS_TLV_CHECKSUM 12 /* rfc3358 */ 112 #define ISIS_TLV_CHECKSUM_MINLEN 2 113 #define ISIS_TLV_LSP_BUFFERSIZE 14 /* iso10589 rev2 */ 114 #define ISIS_TLV_LSP_BUFFERSIZE_MINLEN 2 115 #define ISIS_TLV_EXT_IS_REACH 22 /* draft-ietf-isis-traffic-05 */ 116 #define ISIS_TLV_IS_ALIAS_ID 24 /* draft-ietf-isis-ext-lsp-frags-02 */ 117 #define ISIS_TLV_DECNET_PHASE4 42 118 #define ISIS_TLV_LUCENT_PRIVATE 66 119 #define ISIS_TLV_INT_IP_REACH 128 /* rfc1195, rfc2966 */ 120 #define ISIS_TLV_PROTOCOLS 129 /* rfc1195 */ 121 #define ISIS_TLV_EXT_IP_REACH 130 /* rfc1195, rfc2966 */ 122 #define ISIS_TLV_IDRP_INFO 131 /* rfc1195 */ 123 #define ISIS_TLV_IDRP_INFO_MINLEN 1 124 #define ISIS_TLV_IPADDR 132 /* rfc1195 */ 125 #define ISIS_TLV_IPAUTH 133 /* rfc1195 */ 126 #define ISIS_TLV_TE_ROUTER_ID 134 /* draft-ietf-isis-traffic-05 */ 127 #define ISIS_TLV_EXTD_IP_REACH 135 /* draft-ietf-isis-traffic-05 */ 128 #define ISIS_TLV_HOSTNAME 137 /* rfc2763 */ 129 #define ISIS_TLV_SHARED_RISK_GROUP 138 /* draft-ietf-isis-gmpls-extensions */ 130 #define ISIS_TLV_NORTEL_PRIVATE1 176 131 #define ISIS_TLV_NORTEL_PRIVATE2 177 132 #define ISIS_TLV_RESTART_SIGNALING 211 /* rfc3847 */ 133 #define ISIS_TLV_RESTART_SIGNALING_FLAGLEN 1 134 #define ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN 2 135 #define ISIS_TLV_MT_IS_REACH 222 /* draft-ietf-isis-wg-multi-topology-05 */ 136 #define ISIS_TLV_MT_SUPPORTED 229 /* draft-ietf-isis-wg-multi-topology-05 */ 137 #define ISIS_TLV_MT_SUPPORTED_MINLEN 2 138 #define ISIS_TLV_IP6ADDR 232 /* draft-ietf-isis-ipv6-02 */ 139 #define ISIS_TLV_MT_IP_REACH 235 /* draft-ietf-isis-wg-multi-topology-05 */ 140 #define ISIS_TLV_IP6_REACH 236 /* draft-ietf-isis-ipv6-02 */ 141 #define ISIS_TLV_MT_IP6_REACH 237 /* draft-ietf-isis-wg-multi-topology-05 */ 142 #define ISIS_TLV_PTP_ADJ 240 /* rfc3373 */ 143 #define ISIS_TLV_IIH_SEQNR 241 /* draft-shen-isis-iih-sequence-00 */ 144 #define ISIS_TLV_IIH_SEQNR_MINLEN 4 145 #define ISIS_TLV_VENDOR_PRIVATE 250 /* draft-ietf-isis-experimental-tlv-01 */ 146 #define ISIS_TLV_VENDOR_PRIVATE_MINLEN 3 147 148 static struct tok isis_tlv_values[] = { 149 { ISIS_TLV_AREA_ADDR, "Area address(es)"}, 150 { ISIS_TLV_IS_REACH, "IS Reachability"}, 151 { ISIS_TLV_ESNEIGH, "ES Neighbor(s)"}, 152 { ISIS_TLV_PART_DIS, "Partition DIS"}, 153 { ISIS_TLV_PREFIX_NEIGH, "Prefix Neighbors"}, 154 { ISIS_TLV_ISNEIGH, "IS Neighbor(s)"}, 155 { ISIS_TLV_ISNEIGH_VARLEN, "IS Neighbor(s) (variable length)"}, 156 { ISIS_TLV_PADDING, "Padding"}, 157 { ISIS_TLV_LSP, "LSP entries"}, 158 { ISIS_TLV_AUTH, "Authentication"}, 159 { ISIS_TLV_CHECKSUM, "Checksum"}, 160 { ISIS_TLV_LSP_BUFFERSIZE, "LSP Buffersize"}, 161 { ISIS_TLV_EXT_IS_REACH, "Extended IS Reachability"}, 162 { ISIS_TLV_IS_ALIAS_ID, "IS Alias ID"}, 163 { ISIS_TLV_DECNET_PHASE4, "DECnet Phase IV"}, 164 { ISIS_TLV_LUCENT_PRIVATE, "Lucent Proprietary"}, 165 { ISIS_TLV_INT_IP_REACH, "IPv4 Internal Reachability"}, 166 { ISIS_TLV_PROTOCOLS, "Protocols supported"}, 167 { ISIS_TLV_EXT_IP_REACH, "IPv4 External Reachability"}, 168 { ISIS_TLV_IDRP_INFO, "Inter-Domain Information Type"}, 169 { ISIS_TLV_IPADDR, "IPv4 Interface address(es)"}, 170 { ISIS_TLV_IPAUTH, "IPv4 authentication (deprecated)"}, 171 { ISIS_TLV_TE_ROUTER_ID, "Traffic Engineering Router ID"}, 172 { ISIS_TLV_EXTD_IP_REACH, "Extended IPv4 Reachability"}, 173 { ISIS_TLV_SHARED_RISK_GROUP, "Shared Risk Link Group"}, 174 { ISIS_TLV_NORTEL_PRIVATE1, "Nortel Proprietary"}, 175 { ISIS_TLV_NORTEL_PRIVATE2, "Nortel Proprietary"}, 176 { ISIS_TLV_HOSTNAME, "Hostname"}, 177 { ISIS_TLV_RESTART_SIGNALING, "Restart Signaling"}, 178 { ISIS_TLV_MT_IS_REACH, "Multi Topology IS Reachability"}, 179 { ISIS_TLV_MT_SUPPORTED, "Multi Topology"}, 180 { ISIS_TLV_IP6ADDR, "IPv6 Interface address(es)"}, 181 { ISIS_TLV_MT_IP_REACH, "Multi-Topology IPv4 Reachability"}, 182 { ISIS_TLV_IP6_REACH, "IPv6 reachability"}, 183 { ISIS_TLV_MT_IP6_REACH, "Multi-Topology IP6 Reachability"}, 184 { ISIS_TLV_PTP_ADJ, "Point-to-point Adjacency State"}, 185 { ISIS_TLV_IIH_SEQNR, "Hello PDU Sequence Number"}, 186 { ISIS_TLV_VENDOR_PRIVATE, "Vendor Private"}, 187 { 0, NULL } 188 }; 189 190 #define ESIS_OPTION_PROTOCOLS 129 191 #define ESIS_OPTION_QOS_MAINTENANCE 195 /* iso9542 */ 192 #define ESIS_OPTION_SECURITY 197 /* iso9542 */ 193 #define ESIS_OPTION_ES_CONF_TIME 198 /* iso9542 */ 194 #define ESIS_OPTION_PRIORITY 205 /* iso9542 */ 195 #define ESIS_OPTION_ADDRESS_MASK 225 /* iso9542 */ 196 #define ESIS_OPTION_SNPA_MASK 226 /* iso9542 */ 197 198 static struct tok esis_option_values[] = { 199 { ESIS_OPTION_PROTOCOLS, "Protocols supported"}, 200 { ESIS_OPTION_QOS_MAINTENANCE, "QoS Maintenance" }, 201 { ESIS_OPTION_SECURITY, "Security" }, 202 { ESIS_OPTION_ES_CONF_TIME, "ES Configuration Time" }, 203 { ESIS_OPTION_PRIORITY, "Priority" }, 204 { ESIS_OPTION_ADDRESS_MASK, "Addressk Mask" }, 205 { ESIS_OPTION_SNPA_MASK, "SNPA Mask" }, 206 { 0, NULL } 207 }; 208 209 #define CLNP_OPTION_DISCARD_REASON 193 210 #define CLNP_OPTION_QOS_MAINTENANCE 195 /* iso8473 */ 211 #define CLNP_OPTION_SECURITY 197 /* iso8473 */ 212 #define CLNP_OPTION_SOURCE_ROUTING 200 /* iso8473 */ 213 #define CLNP_OPTION_ROUTE_RECORDING 203 /* iso8473 */ 214 #define CLNP_OPTION_PADDING 204 /* iso8473 */ 215 #define CLNP_OPTION_PRIORITY 205 /* iso8473 */ 216 217 static struct tok clnp_option_values[] = { 218 { CLNP_OPTION_DISCARD_REASON, "Discard Reason"}, 219 { CLNP_OPTION_PRIORITY, "Priority"}, 220 { CLNP_OPTION_QOS_MAINTENANCE, "QoS Maintenance"}, 221 { CLNP_OPTION_SECURITY, "Security"}, 222 { CLNP_OPTION_SOURCE_ROUTING, "Source Routing"}, 223 { CLNP_OPTION_ROUTE_RECORDING, "Route Recording"}, 224 { CLNP_OPTION_PADDING, "Padding"}, 225 { 0, NULL } 226 }; 227 228 static struct tok clnp_option_rfd_class_values[] = { 229 { 0x0, "General"}, 230 { 0x8, "Address"}, 231 { 0x9, "Source Routeing"}, 232 { 0xa, "Lifetime"}, 233 { 0xb, "PDU Discarded"}, 234 { 0xc, "Reassembly"}, 235 { 0, NULL } 236 }; 237 238 static struct tok clnp_option_rfd_general_values[] = { 239 { 0x0, "Reason not specified"}, 240 { 0x1, "Protocol procedure error"}, 241 { 0x2, "Incorrect checksum"}, 242 { 0x3, "PDU discarded due to congestion"}, 243 { 0x4, "Header syntax error (cannot be parsed)"}, 244 { 0x5, "Segmentation needed but not permitted"}, 245 { 0x6, "Incomplete PDU received"}, 246 { 0x7, "Duplicate option"}, 247 { 0, NULL } 248 }; 249 250 static struct tok clnp_option_rfd_address_values[] = { 251 { 0x0, "Destination address unreachable"}, 252 { 0x1, "Destination address unknown"}, 253 { 0, NULL } 254 }; 255 256 static struct tok clnp_option_rfd_source_routeing_values[] = { 257 { 0x0, "Unspecified source routeing error"}, 258 { 0x1, "Syntax error in source routeing field"}, 259 { 0x2, "Unknown address in source routeing field"}, 260 { 0x3, "Path not acceptable"}, 261 { 0, NULL } 262 }; 263 264 static struct tok clnp_option_rfd_lifetime_values[] = { 265 { 0x0, "Lifetime expired while data unit in transit"}, 266 { 0x1, "Lifetime expired during reassembly"}, 267 { 0, NULL } 268 }; 269 270 static struct tok clnp_option_rfd_pdu_discard_values[] = { 271 { 0x0, "Unsupported option not specified"}, 272 { 0x1, "Unsupported protocol version"}, 273 { 0x2, "Unsupported security option"}, 274 { 0x3, "Unsupported source routeing option"}, 275 { 0x4, "Unsupported recording of route option"}, 276 { 0, NULL } 277 }; 278 279 static struct tok clnp_option_rfd_reassembly_values[] = { 280 { 0x0, "Reassembly interference"}, 281 { 0, NULL } 282 }; 283 284 /* array of 16 error-classes */ 285 static struct tok *clnp_option_rfd_error_class[] = { 286 clnp_option_rfd_general_values, 287 NULL, 288 NULL, 289 NULL, 290 NULL, 291 NULL, 292 NULL, 293 NULL, 294 clnp_option_rfd_address_values, 295 clnp_option_rfd_source_routeing_values, 296 clnp_option_rfd_lifetime_values, 297 clnp_option_rfd_pdu_discard_values, 298 clnp_option_rfd_reassembly_values, 299 NULL, 300 NULL, 301 NULL 302 }; 303 304 #define CLNP_OPTION_OPTION_QOS_MASK 0x3f 305 #define CLNP_OPTION_SCOPE_MASK 0xc0 306 #define CLNP_OPTION_SCOPE_SA_SPEC 0x40 307 #define CLNP_OPTION_SCOPE_DA_SPEC 0x80 308 #define CLNP_OPTION_SCOPE_GLOBAL 0xc0 309 310 static struct tok clnp_option_scope_values[] = { 311 { CLNP_OPTION_SCOPE_SA_SPEC, "Source Address Specific"}, 312 { CLNP_OPTION_SCOPE_DA_SPEC, "Destination Address Specific"}, 313 { CLNP_OPTION_SCOPE_GLOBAL, "Globally unique"}, 314 { 0, NULL } 315 }; 316 317 static struct tok clnp_option_sr_rr_values[] = { 318 { 0x0, "partial"}, 319 { 0x1, "complete"}, 320 { 0, NULL } 321 }; 322 323 static struct tok clnp_option_sr_rr_string_values[] = { 324 { CLNP_OPTION_SOURCE_ROUTING, "source routing"}, 325 { CLNP_OPTION_ROUTE_RECORDING, "recording of route in progress"}, 326 { 0, NULL } 327 }; 328 329 static struct tok clnp_option_qos_global_values[] = { 330 { 0x20, "reserved"}, 331 { 0x10, "sequencing vs. delay"}, 332 { 0x08, "congested"}, 333 { 0x04, "delay vs. cost"}, 334 { 0x02, "error vs. delay"}, 335 { 0x01, "error vs. cost"}, 336 { 0, NULL } 337 }; 338 339 #define ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP 3 /* draft-ietf-isis-traffic-05 */ 340 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID 4 /* rfc4205 */ 341 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID 5 /* draft-ietf-isis-traffic-05 */ 342 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR 6 /* draft-ietf-isis-traffic-05 */ 343 #define ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR 8 /* draft-ietf-isis-traffic-05 */ 344 #define ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW 9 /* draft-ietf-isis-traffic-05 */ 345 #define ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW 10 /* draft-ietf-isis-traffic-05 */ 346 #define ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW 11 /* rfc4124 */ 347 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD 12 /* draft-ietf-tewg-diff-te-proto-06 */ 348 #define ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC 18 /* draft-ietf-isis-traffic-05 */ 349 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE 19 /* draft-ietf-isis-link-attr-01 */ 350 #define ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE 20 /* rfc4205 */ 351 #define ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR 21 /* rfc4205 */ 352 #define ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS 22 /* rfc4124 */ 353 354 static struct tok isis_ext_is_reach_subtlv_values[] = { 355 { ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP, "Administrative groups" }, 356 { ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" }, 357 { ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID, "Link Remote Identifier" }, 358 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR, "IPv4 interface address" }, 359 { ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR, "IPv4 neighbor address" }, 360 { ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW, "Maximum link bandwidth" }, 361 { ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW, "Reservable link bandwidth" }, 362 { ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW, "Unreserved bandwidth" }, 363 { ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC, "Traffic Engineering Metric" }, 364 { ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE, "Link Attribute" }, 365 { ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE, "Link Protection Type" }, 366 { ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR, "Interface Switching Capability" }, 367 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD, "Bandwidth Constraints (old)" }, 368 { ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS, "Bandwidth Constraints" }, 369 { 250, "Reserved for cisco specific extensions" }, 370 { 251, "Reserved for cisco specific extensions" }, 371 { 252, "Reserved for cisco specific extensions" }, 372 { 253, "Reserved for cisco specific extensions" }, 373 { 254, "Reserved for cisco specific extensions" }, 374 { 255, "Reserved for future expansion" }, 375 { 0, NULL } 376 }; 377 378 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32 1 /* draft-ietf-isis-admin-tags-01 */ 379 #define ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64 2 /* draft-ietf-isis-admin-tags-01 */ 380 #define ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR 117 /* draft-ietf-isis-wg-multi-topology-05 */ 381 382 static struct tok isis_ext_ip_reach_subtlv_values[] = { 383 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32, "32-Bit Administrative tag" }, 384 { ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64, "64-Bit Administrative tag" }, 385 { ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR, "Management Prefix Color" }, 386 { 0, NULL } 387 }; 388 389 static struct tok isis_subtlv_link_attribute_values[] = { 390 { 0x01, "Local Protection Available" }, 391 { 0x02, "Link excluded from local protection path" }, 392 { 0x04, "Local maintenance required"}, 393 { 0, NULL } 394 }; 395 396 #define ISIS_SUBTLV_AUTH_SIMPLE 1 397 #define ISIS_SUBTLV_AUTH_MD5 54 398 #define ISIS_SUBTLV_AUTH_MD5_LEN 16 399 #define ISIS_SUBTLV_AUTH_PRIVATE 255 400 401 static struct tok isis_subtlv_auth_values[] = { 402 { ISIS_SUBTLV_AUTH_SIMPLE, "simple text password"}, 403 { ISIS_SUBTLV_AUTH_MD5, "HMAC-MD5 password"}, 404 { ISIS_SUBTLV_AUTH_PRIVATE, "Routing Domain private password"}, 405 { 0, NULL } 406 }; 407 408 #define ISIS_SUBTLV_IDRP_RES 0 409 #define ISIS_SUBTLV_IDRP_LOCAL 1 410 #define ISIS_SUBTLV_IDRP_ASN 2 411 412 static struct tok isis_subtlv_idrp_values[] = { 413 { ISIS_SUBTLV_IDRP_RES, "Reserved"}, 414 { ISIS_SUBTLV_IDRP_LOCAL, "Routing-Domain Specific"}, 415 { ISIS_SUBTLV_IDRP_ASN, "AS Number Tag"}, 416 { 0, NULL} 417 }; 418 419 #define CLNP_SEGMENT_PART 0x80 420 #define CLNP_MORE_SEGMENTS 0x40 421 #define CLNP_REQUEST_ER 0x20 422 423 static struct tok clnp_flag_values[] = { 424 { CLNP_SEGMENT_PART, "Segmentation permitted"}, 425 { CLNP_MORE_SEGMENTS, "more Segments"}, 426 { CLNP_REQUEST_ER, "request Error Report"}, 427 { 0, NULL} 428 }; 429 430 #define ISIS_MASK_LSP_OL_BIT(x) ((x)&0x4) 431 #define ISIS_MASK_LSP_ISTYPE_BITS(x) ((x)&0x3) 432 #define ISIS_MASK_LSP_PARTITION_BIT(x) ((x)&0x80) 433 #define ISIS_MASK_LSP_ATT_BITS(x) ((x)&0x78) 434 #define ISIS_MASK_LSP_ATT_ERROR_BIT(x) ((x)&0x40) 435 #define ISIS_MASK_LSP_ATT_EXPENSE_BIT(x) ((x)&0x20) 436 #define ISIS_MASK_LSP_ATT_DELAY_BIT(x) ((x)&0x10) 437 #define ISIS_MASK_LSP_ATT_DEFAULT_BIT(x) ((x)&0x8) 438 439 #define ISIS_MASK_MTID(x) ((x)&0x0fff) 440 #define ISIS_MASK_MTFLAGS(x) ((x)&0xf000) 441 442 static struct tok isis_mt_flag_values[] = { 443 { 0x4000, "sub-TLVs present"}, 444 { 0x8000, "ATT bit set"}, 445 { 0, NULL} 446 }; 447 448 #define ISIS_MASK_TLV_EXTD_IP_UPDOWN(x) ((x)&0x80) 449 #define ISIS_MASK_TLV_EXTD_IP_SUBTLV(x) ((x)&0x40) 450 451 #define ISIS_MASK_TLV_EXTD_IP6_IE(x) ((x)&0x40) 452 #define ISIS_MASK_TLV_EXTD_IP6_SUBTLV(x) ((x)&0x20) 453 454 #define ISIS_LSP_TLV_METRIC_SUPPORTED(x) ((x)&0x80) 455 #define ISIS_LSP_TLV_METRIC_IE(x) ((x)&0x40) 456 #define ISIS_LSP_TLV_METRIC_UPDOWN(x) ((x)&0x80) 457 #define ISIS_LSP_TLV_METRIC_VALUE(x) ((x)&0x3f) 458 459 #define ISIS_MASK_TLV_SHARED_RISK_GROUP(x) ((x)&0x1) 460 461 static struct tok isis_mt_values[] = { 462 { 0, "IPv4 unicast"}, 463 { 1, "In-Band Management"}, 464 { 2, "IPv6 unicast"}, 465 { 3, "Multicast"}, 466 { 4095, "Development, Experimental or Proprietary"}, 467 { 0, NULL } 468 }; 469 470 static struct tok isis_iih_circuit_type_values[] = { 471 { 1, "Level 1 only"}, 472 { 2, "Level 2 only"}, 473 { 3, "Level 1, Level 2"}, 474 { 0, NULL} 475 }; 476 477 #define ISIS_LSP_TYPE_UNUSED0 0 478 #define ISIS_LSP_TYPE_LEVEL_1 1 479 #define ISIS_LSP_TYPE_UNUSED2 2 480 #define ISIS_LSP_TYPE_LEVEL_2 3 481 482 static struct tok isis_lsp_istype_values[] = { 483 { ISIS_LSP_TYPE_UNUSED0, "Unused 0x0 (invalid)"}, 484 { ISIS_LSP_TYPE_LEVEL_1, "L1 IS"}, 485 { ISIS_LSP_TYPE_UNUSED2, "Unused 0x2 (invalid)"}, 486 { ISIS_LSP_TYPE_LEVEL_2, "L2 IS"}, 487 { 0, NULL } 488 }; 489 490 /* 491 * Katz's point to point adjacency TLV uses codes to tell us the state of 492 * the remote adjacency. Enumerate them. 493 */ 494 495 #define ISIS_PTP_ADJ_UP 0 496 #define ISIS_PTP_ADJ_INIT 1 497 #define ISIS_PTP_ADJ_DOWN 2 498 499 static struct tok isis_ptp_adjancey_values[] = { 500 { ISIS_PTP_ADJ_UP, "Up" }, 501 { ISIS_PTP_ADJ_INIT, "Initializing" }, 502 { ISIS_PTP_ADJ_DOWN, "Down" }, 503 { 0, NULL} 504 }; 505 506 struct isis_tlv_ptp_adj { 507 u_int8_t adjacency_state; 508 u_int8_t extd_local_circuit_id[4]; 509 u_int8_t neighbor_sysid[SYSTEM_ID_LEN]; 510 u_int8_t neighbor_extd_local_circuit_id[4]; 511 }; 512 513 static void osi_print_cksum(const u_int8_t *pptr, u_int16_t checksum, 514 u_int checksum_offset, u_int length); 515 static int clnp_print(const u_int8_t *, u_int); 516 static void esis_print(const u_int8_t *, u_int); 517 static int isis_print(const u_int8_t *, u_int); 518 519 struct isis_metric_block { 520 u_int8_t metric_default; 521 u_int8_t metric_delay; 522 u_int8_t metric_expense; 523 u_int8_t metric_error; 524 }; 525 526 struct isis_tlv_is_reach { 527 struct isis_metric_block isis_metric_block; 528 u_int8_t neighbor_nodeid[NODE_ID_LEN]; 529 }; 530 531 struct isis_tlv_es_reach { 532 struct isis_metric_block isis_metric_block; 533 u_int8_t neighbor_sysid[SYSTEM_ID_LEN]; 534 }; 535 536 struct isis_tlv_ip_reach { 537 struct isis_metric_block isis_metric_block; 538 u_int8_t prefix[4]; 539 u_int8_t mask[4]; 540 }; 541 542 static struct tok isis_is_reach_virtual_values[] = { 543 { 0, "IsNotVirtual"}, 544 { 1, "IsVirtual"}, 545 { 0, NULL } 546 }; 547 548 static struct tok isis_restart_flag_values[] = { 549 { 0x1, "Restart Request"}, 550 { 0x2, "Restart Acknowledgement"}, 551 { 0x4, "Suppress adjacency advertisement"}, 552 { 0, NULL } 553 }; 554 555 struct isis_common_header { 556 u_int8_t nlpid; 557 u_int8_t fixed_len; 558 u_int8_t version; /* Protocol version */ 559 u_int8_t id_length; 560 u_int8_t pdu_type; /* 3 MSbits are reserved */ 561 u_int8_t pdu_version; /* Packet format version */ 562 u_int8_t reserved; 563 u_int8_t max_area; 564 }; 565 566 struct isis_iih_lan_header { 567 u_int8_t circuit_type; 568 u_int8_t source_id[SYSTEM_ID_LEN]; 569 u_int8_t holding_time[2]; 570 u_int8_t pdu_len[2]; 571 u_int8_t priority; 572 u_int8_t lan_id[NODE_ID_LEN]; 573 }; 574 575 struct isis_iih_ptp_header { 576 u_int8_t circuit_type; 577 u_int8_t source_id[SYSTEM_ID_LEN]; 578 u_int8_t holding_time[2]; 579 u_int8_t pdu_len[2]; 580 u_int8_t circuit_id; 581 }; 582 583 struct isis_lsp_header { 584 u_int8_t pdu_len[2]; 585 u_int8_t remaining_lifetime[2]; 586 u_int8_t lsp_id[LSP_ID_LEN]; 587 u_int8_t sequence_number[4]; 588 u_int8_t checksum[2]; 589 u_int8_t typeblock; 590 }; 591 592 struct isis_csnp_header { 593 u_int8_t pdu_len[2]; 594 u_int8_t source_id[NODE_ID_LEN]; 595 u_int8_t start_lsp_id[LSP_ID_LEN]; 596 u_int8_t end_lsp_id[LSP_ID_LEN]; 597 }; 598 599 struct isis_psnp_header { 600 u_int8_t pdu_len[2]; 601 u_int8_t source_id[NODE_ID_LEN]; 602 }; 603 604 struct isis_tlv_lsp { 605 u_int8_t remaining_lifetime[2]; 606 u_int8_t lsp_id[LSP_ID_LEN]; 607 u_int8_t sequence_number[4]; 608 u_int8_t checksum[2]; 609 }; 610 611 #define ISIS_COMMON_HEADER_SIZE (sizeof(struct isis_common_header)) 612 #define ISIS_IIH_LAN_HEADER_SIZE (sizeof(struct isis_iih_lan_header)) 613 #define ISIS_IIH_PTP_HEADER_SIZE (sizeof(struct isis_iih_ptp_header)) 614 #define ISIS_LSP_HEADER_SIZE (sizeof(struct isis_lsp_header)) 615 #define ISIS_CSNP_HEADER_SIZE (sizeof(struct isis_csnp_header)) 616 #define ISIS_PSNP_HEADER_SIZE (sizeof(struct isis_psnp_header)) 617 618 void isoclns_print(const u_int8_t *p, u_int length, u_int caplen) 619 { 620 const struct isis_common_header *header; 621 622 header = (const struct isis_common_header *)p; 623 624 if (caplen <= 1) { /* enough bytes on the wire ? */ 625 printf("|OSI"); 626 return; 627 } 628 629 if (eflag) 630 printf("OSI NLPID %s (0x%02x): ", 631 tok2str(nlpid_values,"Unknown",*p), 632 *p); 633 634 switch (*p) { 635 636 case NLPID_CLNP: 637 if (!clnp_print(p, length)) 638 print_unknown_data(p,"\n\t",caplen); 639 break; 640 641 case NLPID_ESIS: 642 esis_print(p, length); 643 return; 644 645 case NLPID_ISIS: 646 if (!isis_print(p, length)) 647 print_unknown_data(p,"\n\t",caplen); 648 break; 649 650 case NLPID_NULLNS: 651 (void)printf("%slength: %u", 652 eflag ? "" : ", ", 653 length); 654 break; 655 656 case NLPID_Q933: 657 q933_print(p+1, length-1); 658 break; 659 660 case NLPID_IP: 661 ip_print(gndo, p+1, length-1); 662 break; 663 664 #ifdef INET6 665 case NLPID_IP6: 666 ip6_print(p+1, length-1); 667 break; 668 #endif 669 670 case NLPID_PPP: 671 ppp_print(p+1, length-1); 672 break; 673 674 default: 675 if (!eflag) 676 printf("OSI NLPID 0x%02x unknown",*p); 677 (void)printf("%slength: %u", 678 eflag ? "" : ", ", 679 length); 680 if (caplen > 1) 681 print_unknown_data(p,"\n\t",caplen); 682 break; 683 } 684 } 685 686 #define CLNP_PDU_ER 1 687 #define CLNP_PDU_DT 28 688 #define CLNP_PDU_MD 29 689 #define CLNP_PDU_ERQ 30 690 #define CLNP_PDU_ERP 31 691 692 static struct tok clnp_pdu_values[] = { 693 { CLNP_PDU_ER, "Error Report"}, 694 { CLNP_PDU_MD, "MD"}, 695 { CLNP_PDU_DT, "Data"}, 696 { CLNP_PDU_ERQ, "Echo Request"}, 697 { CLNP_PDU_ERP, "Echo Response"}, 698 { 0, NULL } 699 }; 700 701 struct clnp_header_t { 702 u_int8_t nlpid; 703 u_int8_t length_indicator; 704 u_int8_t version; 705 u_int8_t lifetime; /* units of 500ms */ 706 u_int8_t type; 707 u_int8_t segment_length[2]; 708 u_int8_t cksum[2]; 709 }; 710 711 struct clnp_segment_header_t { 712 u_int8_t data_unit_id[2]; 713 u_int8_t segment_offset[2]; 714 u_int8_t total_length[2]; 715 }; 716 717 /* 718 * clnp_print 719 * Decode CLNP packets. Return 0 on error. 720 */ 721 722 static int clnp_print (const u_int8_t *pptr, u_int length) 723 { 724 const u_int8_t *optr,*source_address,*dest_address; 725 u_int li,tlen,nsap_offset,source_address_length,dest_address_length, clnp_pdu_type, clnp_flags; 726 const struct clnp_header_t *clnp_header; 727 const struct clnp_segment_header_t *clnp_segment_header; 728 u_int8_t rfd_error_major,rfd_error_minor; 729 730 clnp_header = (const struct clnp_header_t *) pptr; 731 TCHECK(*clnp_header); 732 733 li = clnp_header->length_indicator; 734 optr = pptr; 735 736 if (!eflag) 737 printf("CLNP"); 738 739 /* 740 * Sanity checking of the header. 741 */ 742 743 if (clnp_header->version != CLNP_VERSION) { 744 printf("version %d packet not supported", clnp_header->version); 745 return (0); 746 } 747 748 /* FIXME further header sanity checking */ 749 750 clnp_pdu_type = clnp_header->type & CLNP_PDU_TYPE_MASK; 751 clnp_flags = clnp_header->type & CLNP_FLAG_MASK; 752 753 pptr += sizeof(struct clnp_header_t); 754 li -= sizeof(struct clnp_header_t); 755 dest_address_length = *pptr; 756 dest_address = pptr + 1; 757 758 pptr += (1 + dest_address_length); 759 li -= (1 + dest_address_length); 760 source_address_length = *pptr; 761 source_address = pptr +1; 762 763 pptr += (1 + source_address_length); 764 li -= (1 + source_address_length); 765 766 if (vflag < 1) { 767 printf("%s%s > %s, %s, length %u", 768 eflag ? "" : ", ", 769 isonsap_string(source_address, source_address_length), 770 isonsap_string(dest_address, dest_address_length), 771 tok2str(clnp_pdu_values,"unknown (%u)",clnp_pdu_type), 772 length); 773 return (1); 774 } 775 printf("%slength %u",eflag ? "" : ", ",length); 776 777 printf("\n\t%s PDU, hlen: %u, v: %u, lifetime: %u.%us, Segment PDU length: %u, checksum: 0x%04x", 778 tok2str(clnp_pdu_values, "unknown (%u)",clnp_pdu_type), 779 clnp_header->length_indicator, 780 clnp_header->version, 781 clnp_header->lifetime/2, 782 (clnp_header->lifetime%2)*5, 783 EXTRACT_16BITS(clnp_header->segment_length), 784 EXTRACT_16BITS(clnp_header->cksum)); 785 786 osi_print_cksum(optr, EXTRACT_16BITS(clnp_header->cksum), 7, 787 clnp_header->length_indicator); 788 789 printf("\n\tFlags [%s]", 790 bittok2str(clnp_flag_values,"none",clnp_flags)); 791 792 printf("\n\tsource address (length %u): %s\n\tdest address (length %u): %s", 793 source_address_length, 794 isonsap_string(source_address, source_address_length), 795 dest_address_length, 796 isonsap_string(dest_address,dest_address_length)); 797 798 if (clnp_flags & CLNP_SEGMENT_PART) { 799 clnp_segment_header = (const struct clnp_segment_header_t *) pptr; 800 TCHECK(*clnp_segment_header); 801 printf("\n\tData Unit ID: 0x%04x, Segment Offset: %u, Total PDU Length: %u", 802 EXTRACT_16BITS(clnp_segment_header->data_unit_id), 803 EXTRACT_16BITS(clnp_segment_header->segment_offset), 804 EXTRACT_16BITS(clnp_segment_header->total_length)); 805 pptr+=sizeof(const struct clnp_segment_header_t); 806 li-=sizeof(const struct clnp_segment_header_t); 807 } 808 809 /* now walk the options */ 810 while (li >= 2) { 811 u_int op, opli; 812 const u_int8_t *tptr; 813 814 TCHECK2(*pptr, 2); 815 if (li < 2) { 816 printf(", bad opts/li"); 817 return (0); 818 } 819 op = *pptr++; 820 opli = *pptr++; 821 li -= 2; 822 TCHECK2(*pptr, opli); 823 if (opli > li) { 824 printf(", opt (%d) too long", op); 825 return (0); 826 } 827 li -= opli; 828 tptr = pptr; 829 tlen = opli; 830 831 printf("\n\t %s Option #%u, length %u, value: ", 832 tok2str(clnp_option_values,"Unknown",op), 833 op, 834 opli); 835 836 switch (op) { 837 838 839 case CLNP_OPTION_ROUTE_RECORDING: /* those two options share the format */ 840 case CLNP_OPTION_SOURCE_ROUTING: 841 printf("%s %s", 842 tok2str(clnp_option_sr_rr_values,"Unknown",*tptr), 843 tok2str(clnp_option_sr_rr_string_values,"Unknown Option %u",op)); 844 nsap_offset=*(tptr+1); 845 if (nsap_offset == 0) { 846 printf(" Bad NSAP offset (0)"); 847 break; 848 } 849 nsap_offset-=1; /* offset to nsap list */ 850 if (nsap_offset > tlen) { 851 printf(" Bad NSAP offset (past end of option)"); 852 break; 853 } 854 tptr+=nsap_offset; 855 tlen-=nsap_offset; 856 while (tlen > 0) { 857 source_address_length=*tptr; 858 if (tlen < source_address_length+1) { 859 printf("\n\t NSAP address goes past end of option"); 860 break; 861 } 862 if (source_address_length > 0) { 863 source_address=(tptr+1); 864 TCHECK2(*source_address, source_address_length); 865 printf("\n\t NSAP address (length %u): %s", 866 source_address_length, 867 isonsap_string(source_address, source_address_length)); 868 } 869 tlen-=source_address_length+1; 870 } 871 break; 872 873 case CLNP_OPTION_PRIORITY: 874 printf("0x%1x", *tptr&0x0f); 875 break; 876 877 case CLNP_OPTION_QOS_MAINTENANCE: 878 printf("\n\t Format Code: %s", 879 tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK)); 880 881 if ((*tptr&CLNP_OPTION_SCOPE_MASK) == CLNP_OPTION_SCOPE_GLOBAL) 882 printf("\n\t QoS Flags [%s]", 883 bittok2str(clnp_option_qos_global_values, 884 "none", 885 *tptr&CLNP_OPTION_OPTION_QOS_MASK)); 886 break; 887 888 case CLNP_OPTION_SECURITY: 889 printf("\n\t Format Code: %s, Security-Level %u", 890 tok2str(clnp_option_scope_values,"Reserved",*tptr&CLNP_OPTION_SCOPE_MASK), 891 *(tptr+1)); 892 break; 893 894 case CLNP_OPTION_DISCARD_REASON: 895 rfd_error_major = (*tptr&0xf0) >> 4; 896 rfd_error_minor = *tptr&0x0f; 897 printf("\n\t Class: %s Error (0x%01x), %s (0x%01x)", 898 tok2str(clnp_option_rfd_class_values,"Unknown",rfd_error_major), 899 rfd_error_major, 900 tok2str(clnp_option_rfd_error_class[rfd_error_major],"Unknown",rfd_error_minor), 901 rfd_error_minor); 902 break; 903 904 case CLNP_OPTION_PADDING: 905 printf("padding data"); 906 break; 907 908 /* 909 * FIXME those are the defined Options that lack a decoder 910 * you are welcome to contribute code ;-) 911 */ 912 913 default: 914 print_unknown_data(tptr,"\n\t ",opli); 915 break; 916 } 917 if (vflag > 1) 918 print_unknown_data(pptr,"\n\t ",opli); 919 pptr += opli; 920 } 921 922 switch (clnp_pdu_type) { 923 924 case CLNP_PDU_ER: /* fall through */ 925 case CLNP_PDU_ERP: 926 TCHECK(*pptr); 927 if (*(pptr) == NLPID_CLNP) { 928 printf("\n\t-----original packet-----\n\t"); 929 /* FIXME recursion protection */ 930 clnp_print(pptr, length-clnp_header->length_indicator); 931 break; 932 } 933 934 case CLNP_PDU_DT: 935 case CLNP_PDU_MD: 936 case CLNP_PDU_ERQ: 937 938 default: 939 /* dump the PDU specific data */ 940 if (length-(pptr-optr) > 0) { 941 printf("\n\t undecoded non-header data, length %u",length-clnp_header->length_indicator); 942 print_unknown_data(pptr,"\n\t ",length-(pptr-optr)); 943 } 944 } 945 946 return (1); 947 948 trunc: 949 fputs("[|clnp]", stdout); 950 return (1); 951 952 } 953 954 955 #define ESIS_PDU_REDIRECT 6 956 #define ESIS_PDU_ESH 2 957 #define ESIS_PDU_ISH 4 958 959 static struct tok esis_pdu_values[] = { 960 { ESIS_PDU_REDIRECT, "redirect"}, 961 { ESIS_PDU_ESH, "ESH"}, 962 { ESIS_PDU_ISH, "ISH"}, 963 { 0, NULL } 964 }; 965 966 struct esis_header_t { 967 u_int8_t nlpid; 968 u_int8_t length_indicator; 969 u_int8_t version; 970 u_int8_t reserved; 971 u_int8_t type; 972 u_int8_t holdtime[2]; 973 u_int8_t cksum[2]; 974 }; 975 976 static void 977 esis_print(const u_int8_t *pptr, u_int length) 978 { 979 const u_int8_t *optr; 980 u_int li,esis_pdu_type,source_address_length, source_address_number; 981 const struct esis_header_t *esis_header; 982 983 if (!eflag) 984 printf("ES-IS"); 985 986 if (length <= 2) { 987 if (qflag) 988 printf("bad pkt!"); 989 else 990 printf("no header at all!"); 991 return; 992 } 993 994 esis_header = (const struct esis_header_t *) pptr; 995 TCHECK(*esis_header); 996 li = esis_header->length_indicator; 997 optr = pptr; 998 999 /* 1000 * Sanity checking of the header. 1001 */ 1002 1003 if (esis_header->nlpid != NLPID_ESIS) { 1004 printf(" nlpid 0x%02x packet not supported", esis_header->nlpid); 1005 return; 1006 } 1007 1008 if (esis_header->version != ESIS_VERSION) { 1009 printf(" version %d packet not supported", esis_header->version); 1010 return; 1011 } 1012 1013 if (li > length) { 1014 printf(" length indicator(%d) > PDU size (%d)!", li, length); 1015 return; 1016 } 1017 1018 if (li < sizeof(struct esis_header_t) + 2) { 1019 printf(" length indicator < min PDU size %d:", li); 1020 while (--length != 0) 1021 printf("%02X", *pptr++); 1022 return; 1023 } 1024 1025 esis_pdu_type = esis_header->type & ESIS_PDU_TYPE_MASK; 1026 1027 if (vflag < 1) { 1028 printf("%s%s, length %u", 1029 eflag ? "" : ", ", 1030 tok2str(esis_pdu_values,"unknown type (%u)",esis_pdu_type), 1031 length); 1032 return; 1033 } else 1034 printf("%slength %u\n\t%s (%u)", 1035 eflag ? "" : ", ", 1036 length, 1037 tok2str(esis_pdu_values,"unknown type: %u", esis_pdu_type), 1038 esis_pdu_type); 1039 1040 printf(", v: %u%s", esis_header->version, esis_header->version == ESIS_VERSION ? "" : "unsupported" ); 1041 printf(", checksum: 0x%04x", EXTRACT_16BITS(esis_header->cksum)); 1042 1043 osi_print_cksum(pptr, EXTRACT_16BITS(esis_header->cksum), 7, li); 1044 1045 printf(", holding time: %us, length indicator: %u",EXTRACT_16BITS(esis_header->holdtime),li); 1046 1047 if (vflag > 1) 1048 print_unknown_data(optr,"\n\t",sizeof(struct esis_header_t)); 1049 1050 pptr += sizeof(struct esis_header_t); 1051 li -= sizeof(struct esis_header_t); 1052 1053 switch (esis_pdu_type) { 1054 case ESIS_PDU_REDIRECT: { 1055 const u_int8_t *dst, *snpa, *neta; 1056 u_int dstl, snpal, netal; 1057 1058 TCHECK(*pptr); 1059 if (li < 1) { 1060 printf(", bad redirect/li"); 1061 return; 1062 } 1063 dstl = *pptr; 1064 pptr++; 1065 li--; 1066 TCHECK2(*pptr, dstl); 1067 if (li < dstl) { 1068 printf(", bad redirect/li"); 1069 return; 1070 } 1071 dst = pptr; 1072 pptr += dstl; 1073 li -= dstl; 1074 printf("\n\t %s", isonsap_string(dst,dstl)); 1075 1076 TCHECK(*pptr); 1077 if (li < 1) { 1078 printf(", bad redirect/li"); 1079 return; 1080 } 1081 snpal = *pptr; 1082 pptr++; 1083 li--; 1084 TCHECK2(*pptr, snpal); 1085 if (li < snpal) { 1086 printf(", bad redirect/li"); 1087 return; 1088 } 1089 snpa = pptr; 1090 pptr += snpal; 1091 li -= snpal; 1092 TCHECK(*pptr); 1093 if (li < 1) { 1094 printf(", bad redirect/li"); 1095 return; 1096 } 1097 netal = *pptr; 1098 pptr++; 1099 TCHECK2(*pptr, netal); 1100 if (li < netal) { 1101 printf(", bad redirect/li"); 1102 return; 1103 } 1104 neta = pptr; 1105 pptr += netal; 1106 li -= netal; 1107 1108 if (netal == 0) 1109 printf("\n\t %s", etheraddr_string(snpa)); 1110 else 1111 printf("\n\t %s", isonsap_string(neta,netal)); 1112 break; 1113 } 1114 1115 case ESIS_PDU_ESH: 1116 TCHECK(*pptr); 1117 if (li < 1) { 1118 printf(", bad esh/li"); 1119 return; 1120 } 1121 source_address_number = *pptr; 1122 pptr++; 1123 li--; 1124 1125 printf("\n\t Number of Source Addresses: %u", source_address_number); 1126 1127 while (source_address_number > 0) { 1128 TCHECK(*pptr); 1129 if (li < 1) { 1130 printf(", bad esh/li"); 1131 return; 1132 } 1133 source_address_length = *pptr; 1134 pptr++; 1135 li--; 1136 1137 TCHECK2(*pptr, source_address_length); 1138 if (li < source_address_length) { 1139 printf(", bad esh/li"); 1140 return; 1141 } 1142 printf("\n\t NET (length: %u): %s", 1143 source_address_length, 1144 isonsap_string(pptr,source_address_length)); 1145 pptr += source_address_length; 1146 li -= source_address_length; 1147 source_address_number--; 1148 } 1149 1150 break; 1151 1152 case ESIS_PDU_ISH: { 1153 TCHECK(*pptr); 1154 if (li < 1) { 1155 printf(", bad ish/li"); 1156 return; 1157 } 1158 source_address_length = *pptr; 1159 pptr++; 1160 li--; 1161 TCHECK2(*pptr, source_address_length); 1162 if (li < source_address_length) { 1163 printf(", bad ish/li"); 1164 return; 1165 } 1166 printf("\n\t NET (length: %u): %s", source_address_length, isonsap_string(pptr, source_address_length)); 1167 pptr += source_address_length; 1168 li -= source_address_length; 1169 break; 1170 } 1171 1172 default: 1173 if (vflag <= 1) { 1174 if (pptr < snapend) 1175 print_unknown_data(pptr,"\n\t ",snapend-pptr); 1176 } 1177 return; 1178 } 1179 1180 /* now walk the options */ 1181 while (li >= 2) { 1182 u_int op, opli; 1183 const u_int8_t *tptr; 1184 1185 TCHECK2(*pptr, 2); 1186 if (li < 2) { 1187 printf(", bad opts/li"); 1188 return; 1189 } 1190 op = *pptr++; 1191 opli = *pptr++; 1192 li -= 2; 1193 if (opli > li) { 1194 printf(", opt (%d) too long", op); 1195 return; 1196 } 1197 li -= opli; 1198 tptr = pptr; 1199 1200 printf("\n\t %s Option #%u, length %u, value: ", 1201 tok2str(esis_option_values,"Unknown",op), 1202 op, 1203 opli); 1204 1205 switch (op) { 1206 1207 case ESIS_OPTION_ES_CONF_TIME: 1208 TCHECK2(*pptr, 2); 1209 printf("%us", EXTRACT_16BITS(tptr)); 1210 break; 1211 1212 case ESIS_OPTION_PROTOCOLS: 1213 while (opli>0) { 1214 TCHECK(*pptr); 1215 printf("%s (0x%02x)", 1216 tok2str(nlpid_values, 1217 "unknown", 1218 *tptr), 1219 *tptr); 1220 if (opli>1) /* further NPLIDs ? - put comma */ 1221 printf(", "); 1222 tptr++; 1223 opli--; 1224 } 1225 break; 1226 1227 /* 1228 * FIXME those are the defined Options that lack a decoder 1229 * you are welcome to contribute code ;-) 1230 */ 1231 1232 case ESIS_OPTION_QOS_MAINTENANCE: 1233 case ESIS_OPTION_SECURITY: 1234 case ESIS_OPTION_PRIORITY: 1235 case ESIS_OPTION_ADDRESS_MASK: 1236 case ESIS_OPTION_SNPA_MASK: 1237 1238 default: 1239 print_unknown_data(tptr,"\n\t ",opli); 1240 break; 1241 } 1242 if (vflag > 1) 1243 print_unknown_data(pptr,"\n\t ",opli); 1244 pptr += opli; 1245 } 1246 trunc: 1247 return; 1248 } 1249 1250 /* shared routine for printing system, node and lsp-ids */ 1251 static char * 1252 isis_print_id(const u_int8_t *cp, int id_len) 1253 { 1254 int i; 1255 static char id[sizeof("xxxx.xxxx.xxxx.yy-zz")]; 1256 char *pos = id; 1257 1258 for (i = 1; i <= SYSTEM_ID_LEN; i++) { 1259 snprintf(pos, sizeof(id) - (pos - id), "%02x", *cp++); 1260 pos += strlen(pos); 1261 if (i == 2 || i == 4) 1262 *pos++ = '.'; 1263 } 1264 if (id_len >= NODE_ID_LEN) { 1265 snprintf(pos, sizeof(id) - (pos - id), ".%02x", *cp++); 1266 pos += strlen(pos); 1267 } 1268 if (id_len == LSP_ID_LEN) 1269 snprintf(pos, sizeof(id) - (pos - id), "-%02x", *cp); 1270 return (id); 1271 } 1272 1273 /* print the 4-byte metric block which is common found in the old-style TLVs */ 1274 static int 1275 isis_print_metric_block (const struct isis_metric_block *isis_metric_block) 1276 { 1277 printf(", Default Metric: %d, %s", 1278 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_default), 1279 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_default) ? "External" : "Internal"); 1280 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_delay)) 1281 printf("\n\t\t Delay Metric: %d, %s", 1282 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_delay), 1283 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_delay) ? "External" : "Internal"); 1284 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_expense)) 1285 printf("\n\t\t Expense Metric: %d, %s", 1286 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_expense), 1287 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_expense) ? "External" : "Internal"); 1288 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(isis_metric_block->metric_error)) 1289 printf("\n\t\t Error Metric: %d, %s", 1290 ISIS_LSP_TLV_METRIC_VALUE(isis_metric_block->metric_error), 1291 ISIS_LSP_TLV_METRIC_IE(isis_metric_block->metric_error) ? "External" : "Internal"); 1292 1293 return(1); /* everything is ok */ 1294 } 1295 1296 static int 1297 isis_print_tlv_ip_reach (const u_int8_t *cp, const char *ident, int length) 1298 { 1299 int prefix_len; 1300 const struct isis_tlv_ip_reach *tlv_ip_reach; 1301 1302 tlv_ip_reach = (const struct isis_tlv_ip_reach *)cp; 1303 1304 while (length > 0) { 1305 if ((size_t)length < sizeof(*tlv_ip_reach)) { 1306 printf("short IPv4 Reachability (%d vs %lu)", 1307 length, 1308 (unsigned long)sizeof(*tlv_ip_reach)); 1309 return (0); 1310 } 1311 1312 if (!TTEST(*tlv_ip_reach)) 1313 return (0); 1314 1315 prefix_len = mask2plen(EXTRACT_32BITS(tlv_ip_reach->mask)); 1316 1317 if (prefix_len == -1) 1318 printf("%sIPv4 prefix: %s mask %s", 1319 ident, 1320 ipaddr_string((tlv_ip_reach->prefix)), 1321 ipaddr_string((tlv_ip_reach->mask))); 1322 else 1323 printf("%sIPv4 prefix: %15s/%u", 1324 ident, 1325 ipaddr_string((tlv_ip_reach->prefix)), 1326 prefix_len); 1327 1328 printf(", Distribution: %s, Metric: %u, %s", 1329 ISIS_LSP_TLV_METRIC_UPDOWN(tlv_ip_reach->isis_metric_block.metric_default) ? "down" : "up", 1330 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_default), 1331 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_default) ? "External" : "Internal"); 1332 1333 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_delay)) 1334 printf("%s Delay Metric: %u, %s", 1335 ident, 1336 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_delay), 1337 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_delay) ? "External" : "Internal"); 1338 1339 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_expense)) 1340 printf("%s Expense Metric: %u, %s", 1341 ident, 1342 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_expense), 1343 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_expense) ? "External" : "Internal"); 1344 1345 if (!ISIS_LSP_TLV_METRIC_SUPPORTED(tlv_ip_reach->isis_metric_block.metric_error)) 1346 printf("%s Error Metric: %u, %s", 1347 ident, 1348 ISIS_LSP_TLV_METRIC_VALUE(tlv_ip_reach->isis_metric_block.metric_error), 1349 ISIS_LSP_TLV_METRIC_IE(tlv_ip_reach->isis_metric_block.metric_error) ? "External" : "Internal"); 1350 1351 length -= sizeof(struct isis_tlv_ip_reach); 1352 tlv_ip_reach++; 1353 } 1354 return (1); 1355 } 1356 1357 /* 1358 * this is the common IP-REACH subTLV decoder it is called 1359 * from various EXTD-IP REACH TLVs (135,235,236,237) 1360 */ 1361 1362 static int 1363 isis_print_ip_reach_subtlv (const u_int8_t *tptr,int subt,int subl,const char *ident) { 1364 1365 /* first lets see if we know the subTLVs name*/ 1366 printf("%s%s subTLV #%u, length: %u", 1367 ident, 1368 tok2str(isis_ext_ip_reach_subtlv_values, 1369 "unknown", 1370 subt), 1371 subt, 1372 subl); 1373 1374 if (!TTEST2(*tptr,subl)) 1375 goto trunctlv; 1376 1377 switch(subt) { 1378 case ISIS_SUBTLV_EXTD_IP_REACH_MGMT_PREFIX_COLOR: /* fall through */ 1379 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG32: 1380 while (subl >= 4) { 1381 printf(", 0x%08x (=%u)", 1382 EXTRACT_32BITS(tptr), 1383 EXTRACT_32BITS(tptr)); 1384 tptr+=4; 1385 subl-=4; 1386 } 1387 break; 1388 case ISIS_SUBTLV_EXTD_IP_REACH_ADMIN_TAG64: 1389 while (subl >= 8) { 1390 printf(", 0x%08x%08x", 1391 EXTRACT_32BITS(tptr), 1392 EXTRACT_32BITS(tptr+4)); 1393 tptr+=8; 1394 subl-=8; 1395 } 1396 break; 1397 default: 1398 if(!print_unknown_data(tptr,"\n\t\t ", 1399 subl)) 1400 return(0); 1401 break; 1402 } 1403 return(1); 1404 1405 trunctlv: 1406 printf("%spacket exceeded snapshot",ident); 1407 return(0); 1408 } 1409 1410 /* 1411 * this is the common IS-REACH subTLV decoder it is called 1412 * from isis_print_ext_is_reach() 1413 */ 1414 1415 static int 1416 isis_print_is_reach_subtlv (const u_int8_t *tptr,u_int subt,u_int subl,const char *ident) { 1417 1418 u_int te_class,priority_level,gmpls_switch_cap; 1419 union { /* int to float conversion buffer for several subTLVs */ 1420 float f; 1421 u_int32_t i; 1422 } bw; 1423 1424 /* first lets see if we know the subTLVs name*/ 1425 printf("%s%s subTLV #%u, length: %u", 1426 ident, 1427 tok2str(isis_ext_is_reach_subtlv_values, 1428 "unknown", 1429 subt), 1430 subt, 1431 subl); 1432 1433 if (!TTEST2(*tptr,subl)) 1434 goto trunctlv; 1435 1436 switch(subt) { 1437 case ISIS_SUBTLV_EXT_IS_REACH_ADMIN_GROUP: 1438 case ISIS_SUBTLV_EXT_IS_REACH_LINK_LOCAL_REMOTE_ID: 1439 case ISIS_SUBTLV_EXT_IS_REACH_LINK_REMOTE_ID: 1440 if (subl >= 4) { 1441 printf(", 0x%08x", EXTRACT_32BITS(tptr)); 1442 if (subl == 8) /* rfc4205 */ 1443 printf(", 0x%08x", EXTRACT_32BITS(tptr+4)); 1444 } 1445 break; 1446 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_INTF_ADDR: 1447 case ISIS_SUBTLV_EXT_IS_REACH_IPV4_NEIGHBOR_ADDR: 1448 if (subl >= sizeof(struct in_addr)) 1449 printf(", %s", ipaddr_string(tptr)); 1450 break; 1451 case ISIS_SUBTLV_EXT_IS_REACH_MAX_LINK_BW : 1452 case ISIS_SUBTLV_EXT_IS_REACH_RESERVABLE_BW: 1453 if (subl >= 4) { 1454 bw.i = EXTRACT_32BITS(tptr); 1455 printf(", %.3f Mbps", bw.f*8/1000000 ); 1456 } 1457 break; 1458 case ISIS_SUBTLV_EXT_IS_REACH_UNRESERVED_BW : 1459 if (subl >= 32) { 1460 for (te_class = 0; te_class < 8; te_class++) { 1461 bw.i = EXTRACT_32BITS(tptr); 1462 printf("%s TE-Class %u: %.3f Mbps", 1463 ident, 1464 te_class, 1465 bw.f*8/1000000 ); 1466 tptr+=4; 1467 } 1468 } 1469 break; 1470 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS: /* fall through */ 1471 case ISIS_SUBTLV_EXT_IS_REACH_BW_CONSTRAINTS_OLD: 1472 printf("%sBandwidth Constraints Model ID: %s (%u)", 1473 ident, 1474 tok2str(diffserv_te_bc_values, "unknown", *tptr), 1475 *tptr); 1476 tptr++; 1477 /* decode BCs until the subTLV ends */ 1478 for (te_class = 0; te_class < (subl-1)/4; te_class++) { 1479 bw.i = EXTRACT_32BITS(tptr); 1480 printf("%s Bandwidth constraint CT%u: %.3f Mbps", 1481 ident, 1482 te_class, 1483 bw.f*8/1000000 ); 1484 tptr+=4; 1485 } 1486 break; 1487 case ISIS_SUBTLV_EXT_IS_REACH_TE_METRIC: 1488 if (subl >= 3) 1489 printf(", %u", EXTRACT_24BITS(tptr)); 1490 break; 1491 case ISIS_SUBTLV_EXT_IS_REACH_LINK_ATTRIBUTE: 1492 if (subl == 2) { 1493 printf(", [ %s ] (0x%04x)", 1494 bittok2str(isis_subtlv_link_attribute_values, 1495 "Unknown", 1496 EXTRACT_16BITS(tptr)), 1497 EXTRACT_16BITS(tptr)); 1498 } 1499 break; 1500 case ISIS_SUBTLV_EXT_IS_REACH_LINK_PROTECTION_TYPE: 1501 if (subl >= 2) { 1502 printf(", %s, Priority %u", 1503 bittok2str(gmpls_link_prot_values, "none", *tptr), 1504 *(tptr+1)); 1505 } 1506 break; 1507 case ISIS_SUBTLV_EXT_IS_REACH_INTF_SW_CAP_DESCR: 1508 if (subl >= 36) { 1509 gmpls_switch_cap = *tptr; 1510 printf("%s Interface Switching Capability:%s", 1511 ident, 1512 tok2str(gmpls_switch_cap_values, "Unknown", gmpls_switch_cap)); 1513 printf(", LSP Encoding: %s", 1514 tok2str(gmpls_encoding_values, "Unknown", *(tptr+1))); 1515 tptr+=4; 1516 printf("%s Max LSP Bandwidth:",ident); 1517 for (priority_level = 0; priority_level < 8; priority_level++) { 1518 bw.i = EXTRACT_32BITS(tptr); 1519 printf("%s priority level %d: %.3f Mbps", 1520 ident, 1521 priority_level, 1522 bw.f*8/1000000 ); 1523 tptr+=4; 1524 } 1525 subl-=36; 1526 switch (gmpls_switch_cap) { 1527 case GMPLS_PSC1: 1528 case GMPLS_PSC2: 1529 case GMPLS_PSC3: 1530 case GMPLS_PSC4: 1531 bw.i = EXTRACT_32BITS(tptr); 1532 printf("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f*8/1000000); 1533 printf("%s Interface MTU: %u", ident, EXTRACT_16BITS(tptr+4)); 1534 break; 1535 case GMPLS_TSC: 1536 bw.i = EXTRACT_32BITS(tptr); 1537 printf("%s Min LSP Bandwidth: %.3f Mbps", ident, bw.f*8/1000000); 1538 printf("%s Indication %s", ident, 1539 tok2str(gmpls_switch_cap_tsc_indication_values, "Unknown (%u)", *(tptr+4))); 1540 break; 1541 default: 1542 /* there is some optional stuff left to decode but this is as of yet 1543 not specified so just lets hexdump what is left */ 1544 if(subl>0){ 1545 if(!print_unknown_data(tptr,"\n\t\t ", 1546 subl)) 1547 return(0); 1548 } 1549 } 1550 } 1551 break; 1552 default: 1553 if(!print_unknown_data(tptr,"\n\t\t ", 1554 subl)) 1555 return(0); 1556 break; 1557 } 1558 return(1); 1559 1560 trunctlv: 1561 printf("%spacket exceeded snapshot",ident); 1562 return(0); 1563 } 1564 1565 1566 /* 1567 * this is the common IS-REACH decoder it is called 1568 * from various EXTD-IS REACH style TLVs (22,24,222) 1569 */ 1570 1571 static int 1572 isis_print_ext_is_reach (const u_int8_t *tptr,const char *ident, int tlv_type) { 1573 1574 char ident_buffer[20]; 1575 int subtlv_type,subtlv_len,subtlv_sum_len; 1576 int proc_bytes = 0; /* how many bytes did we process ? */ 1577 1578 if (!TTEST2(*tptr, NODE_ID_LEN)) 1579 return(0); 1580 1581 printf("%sIS Neighbor: %s", ident, isis_print_id(tptr, NODE_ID_LEN)); 1582 tptr+=(NODE_ID_LEN); 1583 1584 if (tlv_type != ISIS_TLV_IS_ALIAS_ID) { /* the Alias TLV Metric field is implicit 0 */ 1585 if (!TTEST2(*tptr, 3)) /* and is therefore skipped */ 1586 return(0); 1587 printf(", Metric: %d",EXTRACT_24BITS(tptr)); 1588 tptr+=3; 1589 } 1590 1591 if (!TTEST2(*tptr, 1)) 1592 return(0); 1593 subtlv_sum_len=*(tptr++); /* read out subTLV length */ 1594 proc_bytes=NODE_ID_LEN+3+1; 1595 printf(", %ssub-TLVs present",subtlv_sum_len ? "" : "no "); 1596 if (subtlv_sum_len) { 1597 printf(" (%u)",subtlv_sum_len); 1598 while (subtlv_sum_len>0) { 1599 if (!TTEST2(*tptr,2)) 1600 return(0); 1601 subtlv_type=*(tptr++); 1602 subtlv_len=*(tptr++); 1603 /* prepend the ident string */ 1604 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); 1605 if(!isis_print_is_reach_subtlv(tptr,subtlv_type,subtlv_len,ident_buffer)) 1606 return(0); 1607 tptr+=subtlv_len; 1608 subtlv_sum_len-=(subtlv_len+2); 1609 proc_bytes+=(subtlv_len+2); 1610 } 1611 } 1612 return(proc_bytes); 1613 } 1614 1615 /* 1616 * this is the common Multi Topology ID decoder 1617 * it is called from various MT-TLVs (222,229,235,237) 1618 */ 1619 1620 static int 1621 isis_print_mtid (const u_int8_t *tptr,const char *ident) { 1622 1623 if (!TTEST2(*tptr, 2)) 1624 return(0); 1625 1626 printf("%s%s", 1627 ident, 1628 tok2str(isis_mt_values, 1629 "Reserved for IETF Consensus", 1630 ISIS_MASK_MTID(EXTRACT_16BITS(tptr)))); 1631 1632 printf(" Topology (0x%03x), Flags: [%s]", 1633 ISIS_MASK_MTID(EXTRACT_16BITS(tptr)), 1634 bittok2str(isis_mt_flag_values, "none",ISIS_MASK_MTFLAGS(EXTRACT_16BITS(tptr)))); 1635 1636 return(2); 1637 } 1638 1639 /* 1640 * this is the common extended IP reach decoder 1641 * it is called from TLVs (135,235,236,237) 1642 * we process the TLV and optional subTLVs and return 1643 * the amount of processed bytes 1644 */ 1645 1646 static int 1647 isis_print_extd_ip_reach (const u_int8_t *tptr, const char *ident, u_int16_t afi) { 1648 1649 char ident_buffer[20]; 1650 #ifdef INET6 1651 u_int8_t prefix[sizeof(struct in6_addr)]; /* shared copy buffer for IPv4 and IPv6 prefixes */ 1652 #else 1653 u_int8_t prefix[sizeof(struct in_addr)]; /* shared copy buffer for IPv4 prefixes */ 1654 #endif 1655 u_int metric, status_byte, bit_length, byte_length, sublen, processed, subtlvtype, subtlvlen; 1656 1657 if (!TTEST2(*tptr, 4)) 1658 return (0); 1659 metric = EXTRACT_32BITS(tptr); 1660 processed=4; 1661 tptr+=4; 1662 1663 if (afi == AF_INET) { 1664 if (!TTEST2(*tptr, 1)) /* fetch status byte */ 1665 return (0); 1666 status_byte=*(tptr++); 1667 bit_length = status_byte&0x3f; 1668 if (bit_length > 32) { 1669 printf("%sIPv4 prefix: bad bit length %u", 1670 ident, 1671 bit_length); 1672 return (0); 1673 } 1674 processed++; 1675 #ifdef INET6 1676 } else if (afi == AF_INET6) { 1677 if (!TTEST2(*tptr, 1)) /* fetch status & prefix_len byte */ 1678 return (0); 1679 status_byte=*(tptr++); 1680 bit_length=*(tptr++); 1681 if (bit_length > 128) { 1682 printf("%sIPv6 prefix: bad bit length %u", 1683 ident, 1684 bit_length); 1685 return (0); 1686 } 1687 processed+=2; 1688 #endif 1689 } else 1690 return (0); /* somebody is fooling us */ 1691 1692 byte_length = (bit_length + 7) / 8; /* prefix has variable length encoding */ 1693 1694 if (!TTEST2(*tptr, byte_length)) 1695 return (0); 1696 memset(prefix, 0, sizeof prefix); /* clear the copy buffer */ 1697 memcpy(prefix,tptr,byte_length); /* copy as much as is stored in the TLV */ 1698 tptr+=byte_length; 1699 processed+=byte_length; 1700 1701 if (afi == AF_INET) 1702 printf("%sIPv4 prefix: %15s/%u", 1703 ident, 1704 ipaddr_string(prefix), 1705 bit_length); 1706 #ifdef INET6 1707 if (afi == AF_INET6) 1708 printf("%sIPv6 prefix: %s/%u", 1709 ident, 1710 ip6addr_string(prefix), 1711 bit_length); 1712 #endif 1713 1714 printf(", Distribution: %s, Metric: %u", 1715 ISIS_MASK_TLV_EXTD_IP_UPDOWN(status_byte) ? "down" : "up", 1716 metric); 1717 1718 if (afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) 1719 printf(", sub-TLVs present"); 1720 #ifdef INET6 1721 if (afi == AF_INET6) 1722 printf(", %s%s", 1723 ISIS_MASK_TLV_EXTD_IP6_IE(status_byte) ? "External" : "Internal", 1724 ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte) ? ", sub-TLVs present" : ""); 1725 #endif 1726 1727 if ((afi == AF_INET && ISIS_MASK_TLV_EXTD_IP_SUBTLV(status_byte)) 1728 #ifdef INET6 1729 || (afi == AF_INET6 && ISIS_MASK_TLV_EXTD_IP6_SUBTLV(status_byte)) 1730 #endif 1731 ) { 1732 /* assume that one prefix can hold more 1733 than one subTLV - therefore the first byte must reflect 1734 the aggregate bytecount of the subTLVs for this prefix 1735 */ 1736 if (!TTEST2(*tptr, 1)) 1737 return (0); 1738 sublen=*(tptr++); 1739 processed+=sublen+1; 1740 printf(" (%u)",sublen); /* print out subTLV length */ 1741 1742 while (sublen>0) { 1743 if (!TTEST2(*tptr,2)) 1744 return (0); 1745 subtlvtype=*(tptr++); 1746 subtlvlen=*(tptr++); 1747 /* prepend the ident string */ 1748 snprintf(ident_buffer, sizeof(ident_buffer), "%s ",ident); 1749 if(!isis_print_ip_reach_subtlv(tptr,subtlvtype,subtlvlen,ident_buffer)) 1750 return(0); 1751 tptr+=subtlvlen; 1752 sublen-=(subtlvlen+2); 1753 } 1754 } 1755 return (processed); 1756 } 1757 1758 /* 1759 * isis_print 1760 * Decode IS-IS packets. Return 0 on error. 1761 */ 1762 1763 static int isis_print (const u_int8_t *p, u_int length) 1764 { 1765 const struct isis_common_header *isis_header; 1766 1767 const struct isis_iih_lan_header *header_iih_lan; 1768 const struct isis_iih_ptp_header *header_iih_ptp; 1769 const struct isis_lsp_header *header_lsp; 1770 const struct isis_csnp_header *header_csnp; 1771 const struct isis_psnp_header *header_psnp; 1772 1773 const struct isis_tlv_lsp *tlv_lsp; 1774 const struct isis_tlv_ptp_adj *tlv_ptp_adj; 1775 const struct isis_tlv_is_reach *tlv_is_reach; 1776 const struct isis_tlv_es_reach *tlv_es_reach; 1777 1778 u_int8_t pdu_type, max_area, id_length, tlv_type, tlv_len, tmp, alen, lan_alen, prefix_len; 1779 u_int8_t ext_is_len, ext_ip_len, mt_len; 1780 const u_int8_t *optr, *pptr, *tptr; 1781 u_short packet_len,pdu_len; 1782 u_int i,vendor_id; 1783 1784 packet_len=length; 1785 optr = p; /* initialize the _o_riginal pointer to the packet start - 1786 need it for parsing the checksum TLV */ 1787 isis_header = (const struct isis_common_header *)p; 1788 TCHECK(*isis_header); 1789 pptr = p+(ISIS_COMMON_HEADER_SIZE); 1790 header_iih_lan = (const struct isis_iih_lan_header *)pptr; 1791 header_iih_ptp = (const struct isis_iih_ptp_header *)pptr; 1792 header_lsp = (const struct isis_lsp_header *)pptr; 1793 header_csnp = (const struct isis_csnp_header *)pptr; 1794 header_psnp = (const struct isis_psnp_header *)pptr; 1795 1796 if (!eflag) 1797 printf("IS-IS"); 1798 1799 /* 1800 * Sanity checking of the header. 1801 */ 1802 1803 if (isis_header->version != ISIS_VERSION) { 1804 printf("version %d packet not supported", isis_header->version); 1805 return (0); 1806 } 1807 1808 if ((isis_header->id_length != SYSTEM_ID_LEN) && (isis_header->id_length != 0)) { 1809 printf("system ID length of %d is not supported", 1810 isis_header->id_length); 1811 return (0); 1812 } 1813 1814 if (isis_header->pdu_version != ISIS_VERSION) { 1815 printf("version %d packet not supported", isis_header->pdu_version); 1816 return (0); 1817 } 1818 1819 max_area = isis_header->max_area; 1820 switch(max_area) { 1821 case 0: 1822 max_area = 3; /* silly shit */ 1823 break; 1824 case 255: 1825 printf("bad packet -- 255 areas"); 1826 return (0); 1827 default: 1828 break; 1829 } 1830 1831 id_length = isis_header->id_length; 1832 switch(id_length) { 1833 case 0: 1834 id_length = 6; /* silly shit again */ 1835 break; 1836 case 1: /* 1-8 are valid sys-ID lenghts */ 1837 case 2: 1838 case 3: 1839 case 4: 1840 case 5: 1841 case 6: 1842 case 7: 1843 case 8: 1844 break; 1845 case 255: 1846 id_length = 0; /* entirely useless */ 1847 break; 1848 default: 1849 break; 1850 } 1851 1852 /* toss any non 6-byte sys-ID len PDUs */ 1853 if (id_length != 6 ) { 1854 printf("bad packet -- illegal sys-ID length (%u)", id_length); 1855 return (0); 1856 } 1857 1858 pdu_type=isis_header->pdu_type; 1859 1860 /* in non-verbose mode print the basic PDU Type plus PDU specific brief information*/ 1861 if (vflag < 1) { 1862 printf("%s%s", 1863 eflag ? "" : ", ", 1864 tok2str(isis_pdu_values,"unknown PDU-Type %u",pdu_type)); 1865 1866 switch (pdu_type) { 1867 1868 case ISIS_PDU_L1_LAN_IIH: 1869 case ISIS_PDU_L2_LAN_IIH: 1870 printf(", src-id %s", 1871 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN)); 1872 printf(", lan-id %s, prio %u", 1873 isis_print_id(header_iih_lan->lan_id,NODE_ID_LEN), 1874 header_iih_lan->priority); 1875 break; 1876 case ISIS_PDU_PTP_IIH: 1877 printf(", src-id %s", isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN)); 1878 break; 1879 case ISIS_PDU_L1_LSP: 1880 case ISIS_PDU_L2_LSP: 1881 printf(", lsp-id %s, seq 0x%08x, lifetime %5us", 1882 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), 1883 EXTRACT_32BITS(header_lsp->sequence_number), 1884 EXTRACT_16BITS(header_lsp->remaining_lifetime)); 1885 break; 1886 case ISIS_PDU_L1_CSNP: 1887 case ISIS_PDU_L2_CSNP: 1888 printf(", src-id %s", isis_print_id(header_csnp->source_id,NODE_ID_LEN)); 1889 break; 1890 case ISIS_PDU_L1_PSNP: 1891 case ISIS_PDU_L2_PSNP: 1892 printf(", src-id %s", isis_print_id(header_psnp->source_id,NODE_ID_LEN)); 1893 break; 1894 1895 } 1896 printf(", length %u", length); 1897 1898 return(1); 1899 } 1900 1901 /* ok they seem to want to know everything - lets fully decode it */ 1902 printf("%slength %u", eflag ? "" : ", ",length); 1903 1904 printf("\n\t%s, hlen: %u, v: %u, pdu-v: %u, sys-id-len: %u (%u), max-area: %u (%u)", 1905 tok2str(isis_pdu_values, 1906 "unknown, type %u", 1907 pdu_type), 1908 isis_header->fixed_len, 1909 isis_header->version, 1910 isis_header->pdu_version, 1911 id_length, 1912 isis_header->id_length, 1913 max_area, 1914 isis_header->max_area); 1915 1916 if (vflag > 1) { 1917 if(!print_unknown_data(optr,"\n\t",8)) /* provide the _o_riginal pointer */ 1918 return(0); /* for optionally debugging the common header */ 1919 } 1920 1921 switch (pdu_type) { 1922 1923 case ISIS_PDU_L1_LAN_IIH: 1924 case ISIS_PDU_L2_LAN_IIH: 1925 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE)) { 1926 printf(", bogus fixed header length %u should be %lu", 1927 isis_header->fixed_len, (unsigned long)ISIS_IIH_LAN_HEADER_SIZE); 1928 return (0); 1929 } 1930 1931 pdu_len=EXTRACT_16BITS(header_iih_lan->pdu_len); 1932 if (packet_len>pdu_len) { 1933 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 1934 length=pdu_len; 1935 } 1936 1937 TCHECK(*header_iih_lan); 1938 printf("\n\t source-id: %s, holding time: %us, Flags: [%s]", 1939 isis_print_id(header_iih_lan->source_id,SYSTEM_ID_LEN), 1940 EXTRACT_16BITS(header_iih_lan->holding_time), 1941 tok2str(isis_iih_circuit_type_values, 1942 "unknown circuit type 0x%02x", 1943 header_iih_lan->circuit_type)); 1944 1945 printf("\n\t lan-id: %s, Priority: %u, PDU length: %u", 1946 isis_print_id(header_iih_lan->lan_id, NODE_ID_LEN), 1947 (header_iih_lan->priority) & ISIS_LAN_PRIORITY_MASK, 1948 pdu_len); 1949 1950 if (vflag > 1) { 1951 if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_LAN_HEADER_SIZE)) 1952 return(0); 1953 } 1954 1955 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); 1956 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_LAN_HEADER_SIZE); 1957 break; 1958 1959 case ISIS_PDU_PTP_IIH: 1960 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE)) { 1961 printf(", bogus fixed header length %u should be %lu", 1962 isis_header->fixed_len, (unsigned long)ISIS_IIH_PTP_HEADER_SIZE); 1963 return (0); 1964 } 1965 1966 pdu_len=EXTRACT_16BITS(header_iih_ptp->pdu_len); 1967 if (packet_len>pdu_len) { 1968 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 1969 length=pdu_len; 1970 } 1971 1972 TCHECK(*header_iih_ptp); 1973 printf("\n\t source-id: %s, holding time: %us, Flags: [%s]", 1974 isis_print_id(header_iih_ptp->source_id,SYSTEM_ID_LEN), 1975 EXTRACT_16BITS(header_iih_ptp->holding_time), 1976 tok2str(isis_iih_circuit_type_values, 1977 "unknown circuit type 0x%02x", 1978 header_iih_ptp->circuit_type)); 1979 1980 printf("\n\t circuit-id: 0x%02x, PDU length: %u", 1981 header_iih_ptp->circuit_id, 1982 pdu_len); 1983 1984 if (vflag > 1) { 1985 if(!print_unknown_data(pptr,"\n\t ",ISIS_IIH_PTP_HEADER_SIZE)) 1986 return(0); 1987 } 1988 1989 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); 1990 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_IIH_PTP_HEADER_SIZE); 1991 break; 1992 1993 case ISIS_PDU_L1_LSP: 1994 case ISIS_PDU_L2_LSP: 1995 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE)) { 1996 printf(", bogus fixed header length %u should be %lu", 1997 isis_header->fixed_len, (unsigned long)ISIS_LSP_HEADER_SIZE); 1998 return (0); 1999 } 2000 2001 pdu_len=EXTRACT_16BITS(header_lsp->pdu_len); 2002 if (packet_len>pdu_len) { 2003 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2004 length=pdu_len; 2005 } 2006 2007 TCHECK(*header_lsp); 2008 printf("\n\t lsp-id: %s, seq: 0x%08x, lifetime: %5us\n\t chksum: 0x%04x", 2009 isis_print_id(header_lsp->lsp_id, LSP_ID_LEN), 2010 EXTRACT_32BITS(header_lsp->sequence_number), 2011 EXTRACT_16BITS(header_lsp->remaining_lifetime), 2012 EXTRACT_16BITS(header_lsp->checksum)); 2013 2014 2015 osi_print_cksum((u_int8_t *)header_lsp->lsp_id, 2016 EXTRACT_16BITS(header_lsp->checksum), 12, length-12); 2017 2018 printf(", PDU length: %u, Flags: [ %s", 2019 pdu_len, 2020 ISIS_MASK_LSP_OL_BIT(header_lsp->typeblock) ? "Overload bit set, " : ""); 2021 2022 if (ISIS_MASK_LSP_ATT_BITS(header_lsp->typeblock)) { 2023 printf("%s", ISIS_MASK_LSP_ATT_DEFAULT_BIT(header_lsp->typeblock) ? "default " : ""); 2024 printf("%s", ISIS_MASK_LSP_ATT_DELAY_BIT(header_lsp->typeblock) ? "delay " : ""); 2025 printf("%s", ISIS_MASK_LSP_ATT_EXPENSE_BIT(header_lsp->typeblock) ? "expense " : ""); 2026 printf("%s", ISIS_MASK_LSP_ATT_ERROR_BIT(header_lsp->typeblock) ? "error " : ""); 2027 printf("ATT bit set, "); 2028 } 2029 printf("%s", ISIS_MASK_LSP_PARTITION_BIT(header_lsp->typeblock) ? "P bit set, " : ""); 2030 printf("%s ]", tok2str(isis_lsp_istype_values,"Unknown(0x%x)",ISIS_MASK_LSP_ISTYPE_BITS(header_lsp->typeblock))); 2031 2032 if (vflag > 1) { 2033 if(!print_unknown_data(pptr,"\n\t ",ISIS_LSP_HEADER_SIZE)) 2034 return(0); 2035 } 2036 2037 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); 2038 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_LSP_HEADER_SIZE); 2039 break; 2040 2041 case ISIS_PDU_L1_CSNP: 2042 case ISIS_PDU_L2_CSNP: 2043 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE)) { 2044 printf(", bogus fixed header length %u should be %lu", 2045 isis_header->fixed_len, (unsigned long)ISIS_CSNP_HEADER_SIZE); 2046 return (0); 2047 } 2048 2049 pdu_len=EXTRACT_16BITS(header_csnp->pdu_len); 2050 if (packet_len>pdu_len) { 2051 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2052 length=pdu_len; 2053 } 2054 2055 TCHECK(*header_csnp); 2056 printf("\n\t source-id: %s, PDU length: %u", 2057 isis_print_id(header_csnp->source_id, NODE_ID_LEN), 2058 pdu_len); 2059 printf("\n\t start lsp-id: %s", 2060 isis_print_id(header_csnp->start_lsp_id, LSP_ID_LEN)); 2061 printf("\n\t end lsp-id: %s", 2062 isis_print_id(header_csnp->end_lsp_id, LSP_ID_LEN)); 2063 2064 if (vflag > 1) { 2065 if(!print_unknown_data(pptr,"\n\t ",ISIS_CSNP_HEADER_SIZE)) 2066 return(0); 2067 } 2068 2069 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); 2070 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_CSNP_HEADER_SIZE); 2071 break; 2072 2073 case ISIS_PDU_L1_PSNP: 2074 case ISIS_PDU_L2_PSNP: 2075 if (isis_header->fixed_len != (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE)) { 2076 printf("- bogus fixed header length %u should be %lu", 2077 isis_header->fixed_len, (unsigned long)ISIS_PSNP_HEADER_SIZE); 2078 return (0); 2079 } 2080 2081 pdu_len=EXTRACT_16BITS(header_psnp->pdu_len); 2082 if (packet_len>pdu_len) { 2083 packet_len=pdu_len; /* do TLV decoding as long as it makes sense */ 2084 length=pdu_len; 2085 } 2086 2087 TCHECK(*header_psnp); 2088 printf("\n\t source-id: %s, PDU length: %u", 2089 isis_print_id(header_psnp->source_id, NODE_ID_LEN), 2090 pdu_len); 2091 2092 if (vflag > 1) { 2093 if(!print_unknown_data(pptr,"\n\t ",ISIS_PSNP_HEADER_SIZE)) 2094 return(0); 2095 } 2096 2097 packet_len -= (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); 2098 pptr = p + (ISIS_COMMON_HEADER_SIZE+ISIS_PSNP_HEADER_SIZE); 2099 break; 2100 2101 default: 2102 if(!print_unknown_data(pptr,"\n\t ",length)) 2103 return(0); 2104 return (0); 2105 } 2106 2107 /* 2108 * Now print the TLV's. 2109 */ 2110 2111 while (packet_len >= 2) { 2112 if (pptr == snapend) { 2113 return (1); 2114 } 2115 2116 if (!TTEST2(*pptr, 2)) { 2117 printf("\n\t\t packet exceeded snapshot (%ld) bytes", 2118 (long)(pptr-snapend)); 2119 return (1); 2120 } 2121 tlv_type = *pptr++; 2122 tlv_len = *pptr++; 2123 tmp =tlv_len; /* copy temporary len & pointer to packet data */ 2124 tptr = pptr; 2125 packet_len -= 2; 2126 if (tlv_len > packet_len) { 2127 break; 2128 } 2129 2130 /* first lets see if we know the TLVs name*/ 2131 printf("\n\t %s TLV #%u, length: %u", 2132 tok2str(isis_tlv_values, 2133 "unknown", 2134 tlv_type), 2135 tlv_type, 2136 tlv_len); 2137 2138 if (tlv_len == 0) /* something is malformed */ 2139 continue; 2140 2141 /* now check if we have a decoder otherwise do a hexdump at the end*/ 2142 switch (tlv_type) { 2143 case ISIS_TLV_AREA_ADDR: 2144 if (!TTEST2(*tptr, 1)) 2145 goto trunctlv; 2146 alen = *tptr++; 2147 while (tmp && alen < tmp) { 2148 printf("\n\t Area address (length: %u): %s", 2149 alen, 2150 isonsap_string(tptr,alen)); 2151 tptr += alen; 2152 tmp -= alen + 1; 2153 if (tmp==0) /* if this is the last area address do not attemt a boundary check */ 2154 break; 2155 if (!TTEST2(*tptr, 1)) 2156 goto trunctlv; 2157 alen = *tptr++; 2158 } 2159 break; 2160 case ISIS_TLV_ISNEIGH: 2161 while (tmp >= ETHER_ADDR_LEN) { 2162 if (!TTEST2(*tptr, ETHER_ADDR_LEN)) 2163 goto trunctlv; 2164 printf("\n\t SNPA: %s",isis_print_id(tptr,ETHER_ADDR_LEN)); 2165 tmp -= ETHER_ADDR_LEN; 2166 tptr += ETHER_ADDR_LEN; 2167 } 2168 break; 2169 2170 case ISIS_TLV_ISNEIGH_VARLEN: 2171 if (!TTEST2(*tptr, 1) || tmp < 3) /* min. TLV length */ 2172 goto trunctlv; 2173 lan_alen = *tptr++; /* LAN address length */ 2174 if (lan_alen == 0) { 2175 printf("\n\t LAN address length 0 bytes (invalid)"); 2176 break; 2177 } 2178 tmp --; 2179 printf("\n\t LAN address length %u bytes ",lan_alen); 2180 while (tmp >= lan_alen) { 2181 if (!TTEST2(*tptr, lan_alen)) 2182 goto trunctlv; 2183 printf("\n\t\tIS Neighbor: %s",isis_print_id(tptr,lan_alen)); 2184 tmp -= lan_alen; 2185 tptr +=lan_alen; 2186 } 2187 break; 2188 2189 case ISIS_TLV_PADDING: 2190 break; 2191 2192 case ISIS_TLV_MT_IS_REACH: 2193 while (tmp >= 2+NODE_ID_LEN+3+1) { 2194 mt_len = isis_print_mtid(tptr, "\n\t "); 2195 if (mt_len == 0) /* did something go wrong ? */ 2196 goto trunctlv; 2197 tptr+=mt_len; 2198 tmp-=mt_len; 2199 2200 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); 2201 if (ext_is_len == 0) /* did something go wrong ? */ 2202 goto trunctlv; 2203 2204 tmp-=ext_is_len; 2205 tptr+=ext_is_len; 2206 } 2207 break; 2208 2209 case ISIS_TLV_IS_ALIAS_ID: 2210 while (tmp >= NODE_ID_LEN+1) { /* is it worth attempting a decode ? */ 2211 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); 2212 if (ext_is_len == 0) /* did something go wrong ? */ 2213 goto trunctlv; 2214 tmp-=ext_is_len; 2215 tptr+=ext_is_len; 2216 } 2217 break; 2218 2219 case ISIS_TLV_EXT_IS_REACH: 2220 while (tmp >= NODE_ID_LEN+3+1) { /* is it worth attempting a decode ? */ 2221 ext_is_len = isis_print_ext_is_reach(tptr,"\n\t ",tlv_type); 2222 if (ext_is_len == 0) /* did something go wrong ? */ 2223 goto trunctlv; 2224 tmp-=ext_is_len; 2225 tptr+=ext_is_len; 2226 } 2227 break; 2228 case ISIS_TLV_IS_REACH: 2229 if (!TTEST2(*tptr,1)) /* check if there is one byte left to read out the virtual flag */ 2230 goto trunctlv; 2231 printf("\n\t %s", 2232 tok2str(isis_is_reach_virtual_values, 2233 "bogus virtual flag 0x%02x", 2234 *tptr++)); 2235 tlv_is_reach = (const struct isis_tlv_is_reach *)tptr; 2236 while (tmp >= sizeof(struct isis_tlv_is_reach)) { 2237 if (!TTEST(*tlv_is_reach)) 2238 goto trunctlv; 2239 printf("\n\t IS Neighbor: %s", 2240 isis_print_id(tlv_is_reach->neighbor_nodeid, NODE_ID_LEN)); 2241 isis_print_metric_block(&tlv_is_reach->isis_metric_block); 2242 tmp -= sizeof(struct isis_tlv_is_reach); 2243 tlv_is_reach++; 2244 } 2245 break; 2246 2247 case ISIS_TLV_ESNEIGH: 2248 tlv_es_reach = (const struct isis_tlv_es_reach *)tptr; 2249 while (tmp >= sizeof(struct isis_tlv_es_reach)) { 2250 if (!TTEST(*tlv_es_reach)) 2251 goto trunctlv; 2252 printf("\n\t ES Neighbor: %s", 2253 isis_print_id(tlv_es_reach->neighbor_sysid,SYSTEM_ID_LEN)); 2254 isis_print_metric_block(&tlv_es_reach->isis_metric_block); 2255 tmp -= sizeof(struct isis_tlv_es_reach); 2256 tlv_es_reach++; 2257 } 2258 break; 2259 2260 /* those two TLVs share the same format */ 2261 case ISIS_TLV_INT_IP_REACH: 2262 case ISIS_TLV_EXT_IP_REACH: 2263 if (!isis_print_tlv_ip_reach(pptr, "\n\t ", tlv_len)) 2264 return (1); 2265 break; 2266 2267 case ISIS_TLV_EXTD_IP_REACH: 2268 while (tmp>0) { 2269 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET); 2270 if (ext_ip_len == 0) /* did something go wrong ? */ 2271 goto trunctlv; 2272 tptr+=ext_ip_len; 2273 tmp-=ext_ip_len; 2274 } 2275 break; 2276 2277 case ISIS_TLV_MT_IP_REACH: 2278 mt_len = isis_print_mtid(tptr, "\n\t "); 2279 if (mt_len == 0) { /* did something go wrong ? */ 2280 goto trunctlv; 2281 } 2282 tptr+=mt_len; 2283 tmp-=mt_len; 2284 2285 while (tmp>0) { 2286 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET); 2287 if (ext_ip_len == 0) /* did something go wrong ? */ 2288 goto trunctlv; 2289 tptr+=ext_ip_len; 2290 tmp-=ext_ip_len; 2291 } 2292 break; 2293 2294 #ifdef INET6 2295 case ISIS_TLV_IP6_REACH: 2296 while (tmp>0) { 2297 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET6); 2298 if (ext_ip_len == 0) /* did something go wrong ? */ 2299 goto trunctlv; 2300 tptr+=ext_ip_len; 2301 tmp-=ext_ip_len; 2302 } 2303 break; 2304 2305 case ISIS_TLV_MT_IP6_REACH: 2306 mt_len = isis_print_mtid(tptr, "\n\t "); 2307 if (mt_len == 0) { /* did something go wrong ? */ 2308 goto trunctlv; 2309 } 2310 tptr+=mt_len; 2311 tmp-=mt_len; 2312 2313 while (tmp>0) { 2314 ext_ip_len = isis_print_extd_ip_reach(tptr, "\n\t ", AF_INET6); 2315 if (ext_ip_len == 0) /* did something go wrong ? */ 2316 goto trunctlv; 2317 tptr+=ext_ip_len; 2318 tmp-=ext_ip_len; 2319 } 2320 break; 2321 2322 case ISIS_TLV_IP6ADDR: 2323 while (tmp>=sizeof(struct in6_addr)) { 2324 if (!TTEST2(*tptr, sizeof(struct in6_addr))) 2325 goto trunctlv; 2326 2327 printf("\n\t IPv6 interface address: %s", 2328 ip6addr_string(tptr)); 2329 2330 tptr += sizeof(struct in6_addr); 2331 tmp -= sizeof(struct in6_addr); 2332 } 2333 break; 2334 #endif 2335 case ISIS_TLV_AUTH: 2336 if (!TTEST2(*tptr, 1)) 2337 goto trunctlv; 2338 2339 printf("\n\t %s: ", 2340 tok2str(isis_subtlv_auth_values, 2341 "unknown Authentication type 0x%02x", 2342 *tptr)); 2343 2344 switch (*tptr) { 2345 case ISIS_SUBTLV_AUTH_SIMPLE: 2346 for(i=1;i<tlv_len;i++) { 2347 if (!TTEST2(*(tptr+i), 1)) 2348 goto trunctlv; 2349 printf("%c",*(tptr+i)); 2350 } 2351 break; 2352 case ISIS_SUBTLV_AUTH_MD5: 2353 for(i=1;i<tlv_len;i++) { 2354 if (!TTEST2(*(tptr+i), 1)) 2355 goto trunctlv; 2356 printf("%02x",*(tptr+i)); 2357 } 2358 if (tlv_len != ISIS_SUBTLV_AUTH_MD5_LEN+1) 2359 printf(", (malformed subTLV) "); 2360 break; 2361 case ISIS_SUBTLV_AUTH_PRIVATE: 2362 default: 2363 if(!print_unknown_data(tptr+1,"\n\t\t ",tlv_len-1)) 2364 return(0); 2365 break; 2366 } 2367 break; 2368 2369 case ISIS_TLV_PTP_ADJ: 2370 tlv_ptp_adj = (const struct isis_tlv_ptp_adj *)tptr; 2371 if(tmp>=1) { 2372 if (!TTEST2(*tptr, 1)) 2373 goto trunctlv; 2374 printf("\n\t Adjacency State: %s (%u)", 2375 tok2str(isis_ptp_adjancey_values, "unknown", *tptr), 2376 *tptr); 2377 tmp--; 2378 } 2379 if(tmp>sizeof(tlv_ptp_adj->extd_local_circuit_id)) { 2380 if (!TTEST2(tlv_ptp_adj->extd_local_circuit_id, 2381 sizeof(tlv_ptp_adj->extd_local_circuit_id))) 2382 goto trunctlv; 2383 printf("\n\t Extended Local circuit-ID: 0x%08x", 2384 EXTRACT_32BITS(tlv_ptp_adj->extd_local_circuit_id)); 2385 tmp-=sizeof(tlv_ptp_adj->extd_local_circuit_id); 2386 } 2387 if(tmp>=SYSTEM_ID_LEN) { 2388 if (!TTEST2(tlv_ptp_adj->neighbor_sysid, SYSTEM_ID_LEN)) 2389 goto trunctlv; 2390 printf("\n\t Neighbor System-ID: %s", 2391 isis_print_id(tlv_ptp_adj->neighbor_sysid,SYSTEM_ID_LEN)); 2392 tmp-=SYSTEM_ID_LEN; 2393 } 2394 if(tmp>=sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id)) { 2395 if (!TTEST2(tlv_ptp_adj->neighbor_extd_local_circuit_id, 2396 sizeof(tlv_ptp_adj->neighbor_extd_local_circuit_id))) 2397 goto trunctlv; 2398 printf("\n\t Neighbor Extended Local circuit-ID: 0x%08x", 2399 EXTRACT_32BITS(tlv_ptp_adj->neighbor_extd_local_circuit_id)); 2400 } 2401 break; 2402 2403 case ISIS_TLV_PROTOCOLS: 2404 printf("\n\t NLPID(s): "); 2405 while (tmp>0) { 2406 if (!TTEST2(*(tptr), 1)) 2407 goto trunctlv; 2408 printf("%s (0x%02x)", 2409 tok2str(nlpid_values, 2410 "unknown", 2411 *tptr), 2412 *tptr); 2413 if (tmp>1) /* further NPLIDs ? - put comma */ 2414 printf(", "); 2415 tptr++; 2416 tmp--; 2417 } 2418 break; 2419 2420 case ISIS_TLV_TE_ROUTER_ID: 2421 if (!TTEST2(*pptr, sizeof(struct in_addr))) 2422 goto trunctlv; 2423 printf("\n\t Traffic Engineering Router ID: %s", ipaddr_string(pptr)); 2424 break; 2425 2426 case ISIS_TLV_IPADDR: 2427 while (tmp>=sizeof(struct in_addr)) { 2428 if (!TTEST2(*tptr, sizeof(struct in_addr))) 2429 goto trunctlv; 2430 printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr)); 2431 tptr += sizeof(struct in_addr); 2432 tmp -= sizeof(struct in_addr); 2433 } 2434 break; 2435 2436 case ISIS_TLV_HOSTNAME: 2437 printf("\n\t Hostname: "); 2438 while (tmp>0) { 2439 if (!TTEST2(*tptr, 1)) 2440 goto trunctlv; 2441 printf("%c",*tptr++); 2442 tmp--; 2443 } 2444 break; 2445 2446 case ISIS_TLV_SHARED_RISK_GROUP: 2447 if (tmp < NODE_ID_LEN) 2448 break; 2449 if (!TTEST2(*tptr, NODE_ID_LEN)) 2450 goto trunctlv; 2451 printf("\n\t IS Neighbor: %s", isis_print_id(tptr, NODE_ID_LEN)); 2452 tptr+=(NODE_ID_LEN); 2453 tmp-=(NODE_ID_LEN); 2454 2455 if (tmp < 1) 2456 break; 2457 if (!TTEST2(*tptr, 1)) 2458 goto trunctlv; 2459 printf(", Flags: [%s]", ISIS_MASK_TLV_SHARED_RISK_GROUP(*tptr++) ? "numbered" : "unnumbered"); 2460 tmp--; 2461 2462 if (tmp < sizeof(struct in_addr)) 2463 break; 2464 if (!TTEST2(*tptr,sizeof(struct in_addr))) 2465 goto trunctlv; 2466 printf("\n\t IPv4 interface address: %s", ipaddr_string(tptr)); 2467 tptr+=sizeof(struct in_addr); 2468 tmp-=sizeof(struct in_addr); 2469 2470 if (tmp < sizeof(struct in_addr)) 2471 break; 2472 if (!TTEST2(*tptr,sizeof(struct in_addr))) 2473 goto trunctlv; 2474 printf("\n\t IPv4 neighbor address: %s", ipaddr_string(tptr)); 2475 tptr+=sizeof(struct in_addr); 2476 tmp-=sizeof(struct in_addr); 2477 2478 while (tmp>=4) { 2479 if (!TTEST2(*tptr, 4)) 2480 goto trunctlv; 2481 printf("\n\t Link-ID: 0x%08x", EXTRACT_32BITS(tptr)); 2482 tptr+=4; 2483 tmp-=4; 2484 } 2485 break; 2486 2487 case ISIS_TLV_LSP: 2488 tlv_lsp = (const struct isis_tlv_lsp *)tptr; 2489 while(tmp>=sizeof(struct isis_tlv_lsp)) { 2490 if (!TTEST((tlv_lsp->lsp_id)[LSP_ID_LEN-1])) 2491 goto trunctlv; 2492 printf("\n\t lsp-id: %s", 2493 isis_print_id(tlv_lsp->lsp_id, LSP_ID_LEN)); 2494 if (!TTEST2(tlv_lsp->sequence_number, 4)) 2495 goto trunctlv; 2496 printf(", seq: 0x%08x",EXTRACT_32BITS(tlv_lsp->sequence_number)); 2497 if (!TTEST2(tlv_lsp->remaining_lifetime, 2)) 2498 goto trunctlv; 2499 printf(", lifetime: %5ds",EXTRACT_16BITS(tlv_lsp->remaining_lifetime)); 2500 if (!TTEST2(tlv_lsp->checksum, 2)) 2501 goto trunctlv; 2502 printf(", chksum: 0x%04x",EXTRACT_16BITS(tlv_lsp->checksum)); 2503 tmp-=sizeof(struct isis_tlv_lsp); 2504 tlv_lsp++; 2505 } 2506 break; 2507 2508 case ISIS_TLV_CHECKSUM: 2509 if (tmp < ISIS_TLV_CHECKSUM_MINLEN) 2510 break; 2511 if (!TTEST2(*tptr, ISIS_TLV_CHECKSUM_MINLEN)) 2512 goto trunctlv; 2513 printf("\n\t checksum: 0x%04x ", EXTRACT_16BITS(tptr)); 2514 /* do not attempt to verify the checksum if it is zero 2515 * most likely a HMAC-MD5 TLV is also present and 2516 * to avoid conflicts the checksum TLV is zeroed. 2517 * see rfc3358 for details 2518 */ 2519 osi_print_cksum(optr, EXTRACT_16BITS(tptr), tptr-optr, length); 2520 break; 2521 2522 case ISIS_TLV_MT_SUPPORTED: 2523 if (tmp < ISIS_TLV_MT_SUPPORTED_MINLEN) 2524 break; 2525 while (tmp>1) { 2526 /* length can only be a multiple of 2, otherwise there is 2527 something broken -> so decode down until length is 1 */ 2528 if (tmp!=1) { 2529 mt_len = isis_print_mtid(tptr, "\n\t "); 2530 if (mt_len == 0) /* did something go wrong ? */ 2531 goto trunctlv; 2532 tptr+=mt_len; 2533 tmp-=mt_len; 2534 } else { 2535 printf("\n\t malformed MT-ID"); 2536 break; 2537 } 2538 } 2539 break; 2540 2541 case ISIS_TLV_RESTART_SIGNALING: 2542 /* first attempt to decode the flags */ 2543 if (tmp < ISIS_TLV_RESTART_SIGNALING_FLAGLEN) 2544 break; 2545 if (!TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_FLAGLEN)) 2546 goto trunctlv; 2547 printf("\n\t Flags [%s]", 2548 bittok2str(isis_restart_flag_values, "none", *tptr)); 2549 tptr+=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; 2550 tmp-=ISIS_TLV_RESTART_SIGNALING_FLAGLEN; 2551 2552 /* is there anything other than the flags field? */ 2553 if (tmp == 0) 2554 break; 2555 2556 if (tmp < ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN) 2557 break; 2558 if (!TTEST2(*tptr, ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN)) 2559 goto trunctlv; 2560 2561 printf(", Remaining holding time %us", EXTRACT_16BITS(tptr)); 2562 tptr+=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; 2563 tmp-=ISIS_TLV_RESTART_SIGNALING_HOLDTIMELEN; 2564 2565 /* is there an additional sysid field present ?*/ 2566 if (tmp == SYSTEM_ID_LEN) { 2567 if (!TTEST2(*tptr, SYSTEM_ID_LEN)) 2568 goto trunctlv; 2569 printf(", for %s",isis_print_id(tptr,SYSTEM_ID_LEN)); 2570 } 2571 break; 2572 2573 case ISIS_TLV_IDRP_INFO: 2574 if (tmp < ISIS_TLV_IDRP_INFO_MINLEN) 2575 break; 2576 if (!TTEST2(*tptr, ISIS_TLV_IDRP_INFO_MINLEN)) 2577 goto trunctlv; 2578 printf("\n\t Inter-Domain Information Type: %s", 2579 tok2str(isis_subtlv_idrp_values, 2580 "Unknown (0x%02x)", 2581 *tptr)); 2582 switch (*tptr++) { 2583 case ISIS_SUBTLV_IDRP_ASN: 2584 if (!TTEST2(*tptr, 2)) /* fetch AS number */ 2585 goto trunctlv; 2586 printf("AS Number: %u",EXTRACT_16BITS(tptr)); 2587 break; 2588 case ISIS_SUBTLV_IDRP_LOCAL: 2589 case ISIS_SUBTLV_IDRP_RES: 2590 default: 2591 if(!print_unknown_data(tptr,"\n\t ",tlv_len-1)) 2592 return(0); 2593 break; 2594 } 2595 break; 2596 2597 case ISIS_TLV_LSP_BUFFERSIZE: 2598 if (tmp < ISIS_TLV_LSP_BUFFERSIZE_MINLEN) 2599 break; 2600 if (!TTEST2(*tptr, ISIS_TLV_LSP_BUFFERSIZE_MINLEN)) 2601 goto trunctlv; 2602 printf("\n\t LSP Buffersize: %u",EXTRACT_16BITS(tptr)); 2603 break; 2604 2605 case ISIS_TLV_PART_DIS: 2606 while (tmp >= SYSTEM_ID_LEN) { 2607 if (!TTEST2(*tptr, SYSTEM_ID_LEN)) 2608 goto trunctlv; 2609 printf("\n\t %s",isis_print_id(tptr,SYSTEM_ID_LEN)); 2610 tptr+=SYSTEM_ID_LEN; 2611 tmp-=SYSTEM_ID_LEN; 2612 } 2613 break; 2614 2615 case ISIS_TLV_PREFIX_NEIGH: 2616 if (tmp < sizeof(struct isis_metric_block)) 2617 break; 2618 if (!TTEST2(*tptr, sizeof(struct isis_metric_block))) 2619 goto trunctlv; 2620 printf("\n\t Metric Block"); 2621 isis_print_metric_block((const struct isis_metric_block *)tptr); 2622 tptr+=sizeof(struct isis_metric_block); 2623 tmp-=sizeof(struct isis_metric_block); 2624 2625 while(tmp>0) { 2626 if (!TTEST2(*tptr, 1)) 2627 goto trunctlv; 2628 prefix_len=*tptr++; /* read out prefix length in semioctets*/ 2629 if (prefix_len < 2) { 2630 printf("\n\t\tAddress: prefix length %u < 2", prefix_len); 2631 break; 2632 } 2633 tmp--; 2634 if (tmp < prefix_len/2) 2635 break; 2636 if (!TTEST2(*tptr, prefix_len/2)) 2637 goto trunctlv; 2638 printf("\n\t\tAddress: %s/%u", 2639 isonsap_string(tptr,prefix_len/2), 2640 prefix_len*4); 2641 tptr+=prefix_len/2; 2642 tmp-=prefix_len/2; 2643 } 2644 break; 2645 2646 case ISIS_TLV_IIH_SEQNR: 2647 if (tmp < ISIS_TLV_IIH_SEQNR_MINLEN) 2648 break; 2649 if (!TTEST2(*tptr, ISIS_TLV_IIH_SEQNR_MINLEN)) /* check if four bytes are on the wire */ 2650 goto trunctlv; 2651 printf("\n\t Sequence number: %u", EXTRACT_32BITS(tptr) ); 2652 break; 2653 2654 case ISIS_TLV_VENDOR_PRIVATE: 2655 if (tmp < ISIS_TLV_VENDOR_PRIVATE_MINLEN) 2656 break; 2657 if (!TTEST2(*tptr, ISIS_TLV_VENDOR_PRIVATE_MINLEN)) /* check if enough byte for a full oui */ 2658 goto trunctlv; 2659 vendor_id = EXTRACT_24BITS(tptr); 2660 printf("\n\t Vendor: %s (%u)", 2661 tok2str(oui_values,"Unknown",vendor_id), 2662 vendor_id); 2663 tptr+=3; 2664 tmp-=3; 2665 if (tmp > 0) /* hexdump the rest */ 2666 if(!print_unknown_data(tptr,"\n\t\t",tmp)) 2667 return(0); 2668 break; 2669 /* 2670 * FIXME those are the defined TLVs that lack a decoder 2671 * you are welcome to contribute code ;-) 2672 */ 2673 2674 case ISIS_TLV_DECNET_PHASE4: 2675 case ISIS_TLV_LUCENT_PRIVATE: 2676 case ISIS_TLV_IPAUTH: 2677 case ISIS_TLV_NORTEL_PRIVATE1: 2678 case ISIS_TLV_NORTEL_PRIVATE2: 2679 2680 default: 2681 if (vflag <= 1) { 2682 if(!print_unknown_data(pptr,"\n\t\t",tlv_len)) 2683 return(0); 2684 } 2685 break; 2686 } 2687 /* do we want to see an additionally hexdump ? */ 2688 if (vflag> 1) { 2689 if(!print_unknown_data(pptr,"\n\t ",tlv_len)) 2690 return(0); 2691 } 2692 2693 pptr += tlv_len; 2694 packet_len -= tlv_len; 2695 } 2696 2697 if (packet_len != 0) { 2698 printf("\n\t %u straggler bytes", packet_len); 2699 } 2700 return (1); 2701 2702 trunc: 2703 fputs("[|isis]", stdout); 2704 return (1); 2705 2706 trunctlv: 2707 printf("\n\t\t packet exceeded snapshot"); 2708 return(1); 2709 } 2710 2711 static void 2712 osi_print_cksum (const u_int8_t *pptr, u_int16_t checksum, 2713 u_int checksum_offset, u_int length) 2714 { 2715 u_int16_t calculated_checksum; 2716 2717 /* do not attempt to verify the checksum if it is zero */ 2718 if (!checksum) { 2719 printf("(unverified)"); 2720 } else { 2721 calculated_checksum = create_osi_cksum(pptr, checksum_offset, length); 2722 if (checksum == calculated_checksum) { 2723 printf(" (correct)"); 2724 } else { 2725 printf(" (incorrect should be 0x%04x)", calculated_checksum); 2726 } 2727 } 2728 } 2729 2730 /* 2731 * Local Variables: 2732 * c-style: whitesmith 2733 * c-basic-offset: 8 2734 * End: 2735 */ 2736