1 /* 2 * Redistribution and use in source and binary forms, with or without 3 * modification, are permitted provided that: (1) source code 4 * distributions retain the above copyright notice and this paragraph 5 * in its entirety, and (2) distributions including binary code include 6 * the above copyright notice and this paragraph in its entirety in 7 * the documentation or other materials provided with the distribution. 8 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND 9 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT 10 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 11 * FOR A PARTICULAR PURPOSE. 12 * 13 * Original code by Hannes Gredler (hannes@gredler.at) 14 */ 15 16 /* \summary: MPLS LSP PING printer */ 17 18 /* specification: RFC 4379 */ 19 20 #include <config.h> 21 22 #include "netdissect-stdinc.h" 23 24 #define ND_LONGJMP_FROM_TCHECK 25 #include "netdissect.h" 26 #include "extract.h" 27 #include "addrtoname.h" 28 #include "ntp.h" 29 30 #include "l2vpn.h" 31 #include "oui.h" 32 33 34 /* 35 * LSPPING common header 36 * 37 * 0 1 2 3 38 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 39 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 40 * | Version Number | Must Be Zero | 41 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 42 * | Message Type | Reply mode | Return Code | Return Subcode| 43 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 44 * | Sender's Handle | 45 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 46 * | Sequence Number | 47 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 48 * | TimeStamp Sent (seconds) | 49 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 50 * | TimeStamp Sent (microseconds) | 51 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 52 * | TimeStamp Received (seconds) | 53 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 54 * | TimeStamp Received (microseconds) | 55 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 56 * | TLVs ... | 57 * . . 58 * . . 59 * . . 60 */ 61 62 struct lspping_common_header { 63 nd_uint16_t version; 64 nd_uint16_t global_flags; 65 nd_uint8_t msg_type; 66 nd_uint8_t reply_mode; 67 nd_uint8_t return_code; 68 nd_uint8_t return_subcode; 69 nd_uint32_t sender_handle; 70 nd_uint32_t seq_number; 71 struct l_fixedpt ts_sent; 72 struct l_fixedpt ts_rcvd; 73 }; 74 75 #define LSPPING_VERSION 1 76 77 static const struct tok lspping_msg_type_values[] = { 78 { 1, "MPLS Echo Request"}, 79 { 2, "MPLS Echo Reply"}, 80 { 0, NULL} 81 }; 82 83 static const struct tok lspping_reply_mode_values[] = { 84 { 1, "Do not reply"}, 85 { 2, "Reply via an IPv4/IPv6 UDP packet"}, 86 { 3, "Reply via an IPv4/IPv6 UDP packet with Router Alert"}, 87 { 4, "Reply via application level control channel"}, 88 { 0, NULL} 89 }; 90 91 static const struct tok lspping_return_code_values[] = { 92 { 0, "No return code or return code contained in the Error Code TLV"}, 93 { 1, "Malformed echo request received"}, 94 { 2, "One or more of the TLVs was not understood"}, 95 { 3, "Replying router is an egress for the FEC at stack depth"}, 96 { 4, "Replying router has no mapping for the FEC at stack depth"}, 97 { 5, "Reserved"}, 98 { 6, "Reserved"}, 99 { 7, "Reserved"}, 100 { 8, "Label switched at stack-depth"}, 101 { 9, "Label switched but no MPLS forwarding at stack-depth"}, 102 { 10, "Mapping for this FEC is not the given label at stack depth"}, 103 { 11, "No label entry at stack-depth"}, 104 { 12, "Protocol not associated with interface at FEC stack depth"}, 105 { 13, "Premature termination of ping due to label stack shrinking to a single label"}, 106 { 0, NULL}, 107 }; 108 109 110 /* 111 * LSPPING TLV header 112 * 0 1 2 3 113 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 114 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 115 * | Type | Length | 116 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 117 * | Value | 118 * . . 119 * . . 120 * . . 121 * | | 122 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 123 */ 124 125 struct lspping_tlv_header { 126 nd_uint16_t type; 127 nd_uint16_t length; 128 }; 129 130 #define LSPPING_TLV_TARGET_FEC_STACK 1 131 #define LSPPING_TLV_DOWNSTREAM_MAPPING 2 132 #define LSPPING_TLV_PAD 3 133 /* not assigned 4 */ 134 #define LSPPING_TLV_VENDOR_ENTERPRISE 5 135 #define LSPPING_TLV_VENDOR_ENTERPRISE_LEN 4 136 /* not assigned 6 */ 137 #define LSPPING_TLV_INTERFACE_LABEL_STACK 7 138 /* not assigned 8 */ 139 #define LSPPING_TLV_ERROR_CODE 9 140 #define LSPPING_TLV_REPLY_TOS_BYTE 10 141 #define LSPPING_TLV_BFD_DISCRIMINATOR 15 /* draft-ietf-bfd-mpls-02 */ 142 #define LSPPING_TLV_BFD_DISCRIMINATOR_LEN 4 143 #define LSPPING_TLV_VENDOR_PRIVATE 0xfc00 144 145 static const struct tok lspping_tlv_values[] = { 146 { LSPPING_TLV_TARGET_FEC_STACK, "Target FEC Stack" }, 147 { LSPPING_TLV_DOWNSTREAM_MAPPING, "Downstream Mapping" }, 148 { LSPPING_TLV_PAD, "Pad" }, 149 { LSPPING_TLV_ERROR_CODE, "Error Code" }, 150 { LSPPING_TLV_VENDOR_ENTERPRISE, "Vendor Enterprise Code" }, 151 { LSPPING_TLV_INTERFACE_LABEL_STACK, "Interface Label Stack" }, 152 { LSPPING_TLV_REPLY_TOS_BYTE, "Reply TOS Byte" }, 153 { LSPPING_TLV_BFD_DISCRIMINATOR, "BFD Discriminator" }, 154 { LSPPING_TLV_VENDOR_PRIVATE, "Vendor Private Code" }, 155 { 0, NULL} 156 }; 157 158 #define LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4 1 159 #define LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6 2 160 #define LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4 3 161 #define LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6 4 162 /* not assigned 5 */ 163 #define LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4 6 164 #define LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6 7 165 #define LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT 8 166 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD 9 167 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW 10 168 #define LSPPING_TLV_TARGETFEC_SUBTLV_FEC_129_PW 11 169 #define LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4 12 170 #define LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6 13 171 #define LSPPING_TLV_TARGETFEC_SUBTLV_GENERIC_IPV4 14 172 #define LSPPING_TLV_TARGETFEC_SUBTLV_GENERIC_IPV6 15 173 #define LSPPING_TLV_TARGETFEC_SUBTLV_NIL_FEC 16 174 175 static const struct tok lspping_tlvtargetfec_subtlv_values[] = { 176 { LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4, "LDP IPv4 prefix"}, 177 { LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6, "LDP IPv6 prefix"}, 178 { LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4, "RSVP IPv4 Session Query"}, 179 { LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6, "RSVP IPv6 Session Query"}, 180 { 5, "Reserved"}, 181 { LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4, "VPN IPv4 prefix"}, 182 { LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6, "VPN IPv6 prefix"}, 183 { LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT, "L2 VPN endpoint"}, 184 { LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD, "FEC 128 pseudowire (old)"}, 185 { LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW, "FEC 128 pseudowire"}, 186 { LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4, "BGP labeled IPv4 prefix"}, 187 { LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6, "BGP labeled IPv6 prefix"}, 188 { 0, NULL} 189 }; 190 191 /* 192 * 0 1 2 3 193 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 194 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 195 * | IPv4 prefix | 196 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 197 * | Prefix Length | Must Be Zero | 198 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 199 */ 200 struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t { 201 nd_ipv4 prefix; 202 nd_uint8_t prefix_len; 203 }; 204 205 /* 206 * 0 1 2 3 207 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 208 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 209 * | IPv6 prefix | 210 * | (16 octets) | 211 * | | 212 * | | 213 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 214 * | Prefix Length | Must Be Zero | 215 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 216 */ 217 struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t { 218 nd_ipv6 prefix; 219 nd_uint8_t prefix_len; 220 }; 221 222 /* 223 * 0 1 2 3 224 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 225 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 226 * | IPv4 tunnel end point address | 227 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 228 * | Must Be Zero | Tunnel ID | 229 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 230 * | Extended Tunnel ID | 231 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 232 * | IPv4 tunnel sender address | 233 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 234 * | Must Be Zero | LSP ID | 235 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 236 */ 237 struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t { 238 nd_ipv4 tunnel_endpoint; 239 nd_byte res[2]; 240 nd_uint16_t tunnel_id; 241 nd_ipv4 extended_tunnel_id; 242 nd_ipv4 tunnel_sender; 243 nd_byte res2[2]; 244 nd_uint16_t lsp_id; 245 }; 246 247 /* 248 * 0 1 2 3 249 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 250 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 251 * | IPv6 tunnel end point address | 252 * | | 253 * | | 254 * | | 255 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 256 * | Must Be Zero | Tunnel ID | 257 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 258 * | Extended Tunnel ID | 259 * | | 260 * | | 261 * | | 262 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 263 * | IPv6 tunnel sender address | 264 * | | 265 * | | 266 * | | 267 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 268 * | Must Be Zero | LSP ID | 269 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 270 */ 271 struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t { 272 nd_ipv6 tunnel_endpoint; 273 nd_byte res[2]; 274 nd_uint16_t tunnel_id; 275 nd_ipv6 extended_tunnel_id; 276 nd_ipv6 tunnel_sender; 277 nd_byte res2[2]; 278 nd_uint16_t lsp_id; 279 }; 280 281 /* 282 * 0 1 2 3 283 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 284 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 285 * | Route Distinguisher | 286 * | (8 octets) | 287 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 288 * | IPv4 prefix | 289 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 290 * | Prefix Length | Must Be Zero | 291 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 292 */ 293 struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t { 294 nd_byte rd[8]; 295 nd_ipv4 prefix; 296 nd_uint8_t prefix_len; 297 }; 298 299 /* 300 * 0 1 2 3 301 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 302 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 303 * | Route Distinguisher | 304 * | (8 octets) | 305 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 306 * | IPv6 prefix | 307 * | (16 octets) | 308 * | | 309 * | | 310 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 311 * | Prefix Length | Must Be Zero | 312 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 313 */ 314 struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t { 315 nd_byte rd[8]; 316 nd_ipv6 prefix; 317 nd_uint8_t prefix_len; 318 }; 319 320 /* 321 * 0 1 2 3 322 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 323 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 324 * | Route Distinguisher | 325 * | (8 octets) | 326 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 327 * | Sender's VE ID | Receiver's VE ID | 328 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 329 * | Encapsulation Type | Must Be Zero | 330 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 331 * 0 1 2 3 332 */ 333 struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t { 334 nd_byte rd[8]; 335 nd_uint16_t sender_ve_id; 336 nd_uint16_t receiver_ve_id; 337 nd_uint16_t encapsulation; 338 }; 339 340 /* 341 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 342 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 343 * | Remote PE Address | 344 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 345 * | PW ID | 346 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 347 * | PW Type | Must Be Zero | 348 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 349 */ 350 struct lspping_tlv_targetfec_subtlv_fec_128_pw_old { 351 nd_ipv4 remote_pe_address; 352 nd_uint32_t pw_id; 353 nd_uint16_t pw_type; 354 }; 355 356 /* 357 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 358 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 359 * | Sender's PE Address | 360 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 361 * | Remote PE Address | 362 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 363 * | PW ID | 364 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 365 * | PW Type | Must Be Zero | 366 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 367 */ 368 struct lspping_tlv_targetfec_subtlv_fec_128_pw { 369 nd_ipv4 sender_pe_address; 370 nd_ipv4 remote_pe_address; 371 nd_uint32_t pw_id; 372 nd_uint16_t pw_type; 373 }; 374 375 /* 376 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 377 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 378 * | IPv4 prefix | 379 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 380 * | Prefix Length | Must Be Zero | 381 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 382 */ 383 struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t { 384 nd_ipv4 prefix; 385 nd_uint8_t prefix_len; 386 }; 387 388 /* 389 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 390 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 391 * | IPv6 prefix | 392 * | (16 octets) | 393 * | | 394 * | | 395 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 396 * | Prefix Length | Must Be Zero | 397 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 398 */ 399 struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t { 400 nd_ipv6 prefix; 401 nd_uint8_t prefix_len; 402 }; 403 404 /* 405 * 0 1 2 3 406 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 407 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 408 * | MTU | Address Type | Resvd (SBZ) | 409 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 410 * | Downstream IP Address (4 or 16 octets) | 411 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 412 * | Downstream Interface Address (4 or 16 octets) | 413 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 414 * | Multipath Type| Depth Limit | Multipath Length | 415 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 416 * . . 417 * . (Multipath Information) . 418 * . . 419 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 420 * | Downstream Label | Protocol | 421 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 422 * . . 423 * . . 424 * . . 425 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 426 * | Downstream Label | Protocol | 427 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 428 */ 429 /* Enough to get the address type */ 430 struct lspping_tlv_downstream_map_t { 431 nd_uint16_t mtu; 432 nd_uint8_t address_type; 433 nd_uint8_t ds_flags; 434 }; 435 436 struct lspping_tlv_downstream_map_ipv4_t { 437 nd_uint16_t mtu; 438 nd_uint8_t address_type; 439 nd_uint8_t ds_flags; 440 nd_ipv4 downstream_ip; 441 nd_ipv4 downstream_interface; 442 }; 443 444 struct lspping_tlv_downstream_map_ipv4_unmb_t { 445 nd_uint16_t mtu; 446 nd_uint8_t address_type; 447 nd_uint8_t ds_flags; 448 nd_ipv4 downstream_ip; 449 nd_uint32_t downstream_interface; 450 }; 451 452 struct lspping_tlv_downstream_map_ipv6_t { 453 nd_uint16_t mtu; 454 nd_uint8_t address_type; 455 nd_uint8_t ds_flags; 456 nd_ipv6 downstream_ip; 457 nd_ipv6 downstream_interface; 458 }; 459 460 struct lspping_tlv_downstream_map_ipv6_unmb_t { 461 nd_uint16_t mtu; 462 nd_uint8_t address_type; 463 nd_uint8_t ds_flags; 464 nd_ipv6 downstream_ip; 465 nd_uint32_t downstream_interface; 466 }; 467 468 struct lspping_tlv_downstream_map_info_t { 469 nd_uint8_t multipath_type; 470 nd_uint8_t depth_limit; 471 nd_uint16_t multipath_length; 472 }; 473 474 #define LSPPING_AFI_IPV4 1 475 #define LSPPING_AFI_IPV4_UNMB 2 476 #define LSPPING_AFI_IPV6 3 477 #define LSPPING_AFI_IPV6_UNMB 4 478 479 static const struct tok lspping_tlv_downstream_addr_values[] = { 480 { LSPPING_AFI_IPV4, "IPv4"}, 481 { LSPPING_AFI_IPV4_UNMB, "Unnumbered IPv4"}, 482 { LSPPING_AFI_IPV6, "IPv6"}, 483 { LSPPING_AFI_IPV6_UNMB, "IPv6"}, 484 { 0, NULL} 485 }; 486 487 void 488 lspping_print(netdissect_options *ndo, 489 const u_char *pptr, u_int len) 490 { 491 const struct lspping_common_header *lspping_com_header; 492 const struct lspping_tlv_header *lspping_tlv_header; 493 const struct lspping_tlv_header *lspping_subtlv_header; 494 const u_char *tptr,*tlv_tptr,*subtlv_tptr; 495 u_int return_code, return_subcode; 496 u_int tlen,lspping_tlv_len,lspping_tlv_type,tlv_tlen; 497 int tlv_hexdump,subtlv_hexdump; 498 u_int lspping_subtlv_len,lspping_subtlv_type; 499 uint32_t int_part, fraction; 500 u_int address_type; 501 502 union { 503 const struct lspping_tlv_downstream_map_t *lspping_tlv_downstream_map; 504 const struct lspping_tlv_downstream_map_ipv4_t *lspping_tlv_downstream_map_ipv4; 505 const struct lspping_tlv_downstream_map_ipv4_unmb_t *lspping_tlv_downstream_map_ipv4_unmb; 506 const struct lspping_tlv_downstream_map_ipv6_t *lspping_tlv_downstream_map_ipv6; 507 const struct lspping_tlv_downstream_map_ipv6_unmb_t *lspping_tlv_downstream_map_ipv6_unmb; 508 const struct lspping_tlv_downstream_map_info_t *lspping_tlv_downstream_map_info; 509 } tlv_ptr; 510 511 union { 512 const struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t *lspping_tlv_targetfec_subtlv_ldp_ipv4; 513 const struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t *lspping_tlv_targetfec_subtlv_ldp_ipv6; 514 const struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t *lspping_tlv_targetfec_subtlv_rsvp_ipv4; 515 const struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t *lspping_tlv_targetfec_subtlv_rsvp_ipv6; 516 const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t *lspping_tlv_targetfec_subtlv_l3vpn_ipv4; 517 const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t *lspping_tlv_targetfec_subtlv_l3vpn_ipv6; 518 const struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t *lspping_tlv_targetfec_subtlv_l2vpn_endpt; 519 const struct lspping_tlv_targetfec_subtlv_fec_128_pw_old *lspping_tlv_targetfec_subtlv_l2vpn_vcid_old; 520 const struct lspping_tlv_targetfec_subtlv_fec_128_pw *lspping_tlv_targetfec_subtlv_l2vpn_vcid; 521 const struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t *lspping_tlv_targetfec_subtlv_bgp_ipv4; 522 const struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t *lspping_tlv_targetfec_subtlv_bgp_ipv6; 523 } subtlv_ptr; 524 525 ndo->ndo_protocol = "lspping"; 526 tptr=pptr; 527 lspping_com_header = (const struct lspping_common_header *)pptr; 528 if (len < sizeof(struct lspping_common_header)) 529 goto tooshort; 530 ND_TCHECK_SIZE(lspping_com_header); 531 532 /* 533 * Sanity checking of the header. 534 */ 535 if (GET_BE_U_2(lspping_com_header->version) != LSPPING_VERSION) { 536 ND_PRINT("LSP-PING version %u packet not supported", 537 GET_BE_U_2(lspping_com_header->version)); 538 return; 539 } 540 541 /* in non-verbose mode just lets print the basic Message Type*/ 542 if (ndo->ndo_vflag < 1) { 543 ND_PRINT("LSP-PINGv%u, %s, seq %u, length: %u", 544 GET_BE_U_2(lspping_com_header->version), 545 tok2str(lspping_msg_type_values, "unknown (%u)",GET_U_1(lspping_com_header->msg_type)), 546 GET_BE_U_4(lspping_com_header->seq_number), 547 len); 548 return; 549 } 550 551 /* ok they seem to want to know everything - lets fully decode it */ 552 553 tlen=len; 554 555 ND_PRINT("\n\tLSP-PINGv%u, msg-type: %s (%u), length: %u\n\t reply-mode: %s (%u)", 556 GET_BE_U_2(lspping_com_header->version), 557 tok2str(lspping_msg_type_values, "unknown",GET_U_1(lspping_com_header->msg_type)), 558 GET_U_1(lspping_com_header->msg_type), 559 len, 560 tok2str(lspping_reply_mode_values, "unknown",GET_U_1(lspping_com_header->reply_mode)), 561 GET_U_1(lspping_com_header->reply_mode)); 562 563 /* 564 * the following return codes require that the subcode is attached 565 * at the end of the translated token output 566 */ 567 return_code = GET_U_1(lspping_com_header->return_code); 568 return_subcode = GET_U_1(lspping_com_header->return_subcode); 569 if (return_code == 3 || 570 return_code == 4 || 571 return_code == 8 || 572 return_code == 10 || 573 return_code == 11 || 574 return_code == 12 ) 575 ND_PRINT("\n\t Return Code: %s %u (%u)\n\t Return Subcode: (%u)", 576 tok2str(lspping_return_code_values, "unknown",return_code), 577 return_subcode, 578 return_code, 579 return_subcode); 580 else 581 ND_PRINT("\n\t Return Code: %s (%u)\n\t Return Subcode: (%u)", 582 tok2str(lspping_return_code_values, "unknown",return_code), 583 return_code, 584 return_subcode); 585 586 ND_PRINT("\n\t Sender Handle: 0x%08x, Sequence: %u", 587 GET_BE_U_4(lspping_com_header->sender_handle), 588 GET_BE_U_4(lspping_com_header->seq_number)); 589 590 ND_PRINT("\n\t Sender Timestamp: "); 591 p_ntp_time(ndo, &lspping_com_header->ts_sent); 592 ND_PRINT(" "); 593 594 int_part=GET_BE_U_4(lspping_com_header->ts_rcvd.int_part); 595 fraction=GET_BE_U_4(lspping_com_header->ts_rcvd.fraction); 596 ND_PRINT("Receiver Timestamp: "); 597 if (! (int_part == 0 && fraction == 0)) 598 p_ntp_time(ndo, &lspping_com_header->ts_rcvd); 599 else 600 ND_PRINT("no timestamp"); 601 602 tptr+=sizeof(struct lspping_common_header); 603 tlen-=sizeof(struct lspping_common_header); 604 605 while (tlen != 0) { 606 /* Does the TLV go past the end of the packet? */ 607 if (tlen < sizeof(struct lspping_tlv_header)) 608 goto tooshort; 609 610 lspping_tlv_header = (const struct lspping_tlv_header *)tptr; 611 lspping_tlv_type=GET_BE_U_2(lspping_tlv_header->type); 612 lspping_tlv_len=GET_BE_U_2(lspping_tlv_header->length); 613 614 ND_PRINT("\n\t %s TLV (%u), length: %u", 615 tok2str(lspping_tlv_values, 616 "Unknown", 617 lspping_tlv_type), 618 lspping_tlv_type, 619 lspping_tlv_len); 620 621 /* some little sanity checking */ 622 if (lspping_tlv_len == 0) { 623 tptr+=sizeof(struct lspping_tlv_header); 624 tlen-=sizeof(struct lspping_tlv_header); 625 continue; /* no value to dissect */ 626 } 627 628 tlv_tptr=tptr+sizeof(struct lspping_tlv_header); 629 tlv_tlen=lspping_tlv_len; /* header not included -> no adjustment */ 630 631 /* Does the TLV go past the end of the packet? */ 632 if (tlen < lspping_tlv_len+sizeof(struct lspping_tlv_header)) 633 goto tooshort; 634 /* did we capture enough for fully decoding the tlv ? */ 635 ND_TCHECK_LEN(tlv_tptr, lspping_tlv_len); 636 tlv_hexdump=FALSE; 637 638 switch(lspping_tlv_type) { 639 case LSPPING_TLV_TARGET_FEC_STACK: 640 while (tlv_tlen != 0) { 641 /* Does the subTLV header go past the end of the TLV? */ 642 if (tlv_tlen < sizeof(struct lspping_tlv_header)) { 643 ND_PRINT("\n\t TLV is too short"); 644 tlv_hexdump = TRUE; 645 goto tlv_tooshort; 646 } 647 subtlv_hexdump=FALSE; 648 649 lspping_subtlv_header = (const struct lspping_tlv_header *)tlv_tptr; 650 lspping_subtlv_type=GET_BE_U_2(lspping_subtlv_header->type); 651 lspping_subtlv_len=GET_BE_U_2(lspping_subtlv_header->length); 652 subtlv_tptr=tlv_tptr+sizeof(struct lspping_tlv_header); 653 654 /* Does the subTLV go past the end of the TLV? */ 655 if (tlv_tlen < lspping_subtlv_len+sizeof(struct lspping_tlv_header)) { 656 ND_PRINT("\n\t TLV is too short"); 657 tlv_hexdump = TRUE; 658 goto tlv_tooshort; 659 } 660 661 /* Did we capture enough for fully decoding the subTLV? */ 662 ND_TCHECK_LEN(subtlv_tptr, lspping_subtlv_len); 663 664 ND_PRINT("\n\t %s subTLV (%u), length: %u", 665 tok2str(lspping_tlvtargetfec_subtlv_values, 666 "Unknown", 667 lspping_subtlv_type), 668 lspping_subtlv_type, 669 lspping_subtlv_len); 670 671 switch(lspping_subtlv_type) { 672 673 case LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV4: 674 /* Is the subTLV length correct? */ 675 if (lspping_subtlv_len != 5) { 676 ND_PRINT("\n\t invalid subTLV length, should be 5"); 677 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ 678 } else { 679 subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv4 = 680 (const struct lspping_tlv_targetfec_subtlv_ldp_ipv4_t *)subtlv_tptr; 681 ND_PRINT("\n\t %s/%u", 682 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv4->prefix), 683 GET_U_1(subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv4->prefix_len)); 684 } 685 break; 686 687 case LSPPING_TLV_TARGETFEC_SUBTLV_LDP_IPV6: 688 /* Is the subTLV length correct? */ 689 if (lspping_subtlv_len != 17) { 690 ND_PRINT("\n\t invalid subTLV length, should be 17"); 691 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ 692 } else { 693 subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv6 = 694 (const struct lspping_tlv_targetfec_subtlv_ldp_ipv6_t *)subtlv_tptr; 695 ND_PRINT("\n\t %s/%u", 696 GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv6->prefix), 697 GET_U_1(subtlv_ptr.lspping_tlv_targetfec_subtlv_ldp_ipv6->prefix_len)); 698 } 699 break; 700 701 case LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV4: 702 /* Is the subTLV length correct? */ 703 if (lspping_subtlv_len != 5) { 704 ND_PRINT("\n\t invalid subTLV length, should be 5"); 705 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ 706 } else { 707 subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv4 = 708 (const struct lspping_tlv_targetfec_subtlv_bgp_ipv4_t *)subtlv_tptr; 709 ND_PRINT("\n\t %s/%u", 710 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv4->prefix), 711 GET_U_1(subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv4->prefix_len)); 712 } 713 break; 714 715 case LSPPING_TLV_TARGETFEC_SUBTLV_BGP_IPV6: 716 /* Is the subTLV length correct? */ 717 if (lspping_subtlv_len != 17) { 718 ND_PRINT("\n\t invalid subTLV length, should be 17"); 719 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ 720 } else { 721 subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv6 = 722 (const struct lspping_tlv_targetfec_subtlv_bgp_ipv6_t *)subtlv_tptr; 723 ND_PRINT("\n\t %s/%u", 724 GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv6->prefix), 725 GET_U_1(subtlv_ptr.lspping_tlv_targetfec_subtlv_bgp_ipv6->prefix_len)); 726 } 727 break; 728 729 case LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV4: 730 /* Is the subTLV length correct? */ 731 if (lspping_subtlv_len != 20) { 732 ND_PRINT("\n\t invalid subTLV length, should be 20"); 733 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ 734 } else { 735 subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4 = 736 (const struct lspping_tlv_targetfec_subtlv_rsvp_ipv4_t *)subtlv_tptr; 737 ND_PRINT("\n\t tunnel end-point %s, tunnel sender %s, lsp-id 0x%04x" 738 "\n\t tunnel-id 0x%04x, extended tunnel-id %s", 739 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_endpoint), 740 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_sender), 741 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->lsp_id), 742 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->tunnel_id), 743 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv4->extended_tunnel_id)); 744 } 745 break; 746 747 case LSPPING_TLV_TARGETFEC_SUBTLV_RSVP_IPV6: 748 /* Is the subTLV length correct? */ 749 if (lspping_subtlv_len != 56) { 750 ND_PRINT("\n\t invalid subTLV length, should be 56"); 751 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ 752 } else { 753 subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6 = 754 (const struct lspping_tlv_targetfec_subtlv_rsvp_ipv6_t *)subtlv_tptr; 755 ND_PRINT("\n\t tunnel end-point %s, tunnel sender %s, lsp-id 0x%04x" 756 "\n\t tunnel-id 0x%04x, extended tunnel-id %s", 757 GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_endpoint), 758 GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_sender), 759 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->lsp_id), 760 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->tunnel_id), 761 GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_rsvp_ipv6->extended_tunnel_id)); 762 } 763 break; 764 765 case LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV4: 766 /* Is the subTLV length correct? */ 767 if (lspping_subtlv_len != 13) { 768 ND_PRINT("\n\t invalid subTLV length, should be 13"); 769 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ 770 } else { 771 subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4 = 772 (const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv4_t *)subtlv_tptr; 773 ND_PRINT("\n\t RD: %s, %s/%u", 774 bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->rd), 775 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->prefix), 776 GET_U_1(subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv4->prefix_len)); 777 } 778 break; 779 780 case LSPPING_TLV_TARGETFEC_SUBTLV_L3VPN_IPV6: 781 /* Is the subTLV length correct? */ 782 if (lspping_subtlv_len != 25) { 783 ND_PRINT("\n\t invalid subTLV length, should be 25"); 784 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ 785 } else { 786 subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6 = 787 (const struct lspping_tlv_targetfec_subtlv_l3vpn_ipv6_t *)subtlv_tptr; 788 ND_PRINT("\n\t RD: %s, %s/%u", 789 bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->rd), 790 GET_IP6ADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->prefix), 791 GET_U_1(subtlv_ptr.lspping_tlv_targetfec_subtlv_l3vpn_ipv6->prefix_len)); 792 } 793 break; 794 795 case LSPPING_TLV_TARGETFEC_SUBTLV_L2VPN_ENDPT: 796 /* Is the subTLV length correct? */ 797 if (lspping_subtlv_len != 14) { 798 ND_PRINT("\n\t invalid subTLV length, should be 14"); 799 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ 800 } else { 801 subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt = 802 (const struct lspping_tlv_targetfec_subtlv_l2vpn_endpt_t *)subtlv_tptr; 803 ND_PRINT("\n\t RD: %s, Sender VE ID: %u, Receiver VE ID: %u" 804 "\n\t Encapsulation Type: %s (%u)", 805 bgp_vpn_rd_print(ndo, subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->rd), 806 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->sender_ve_id), 807 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->receiver_ve_id), 808 tok2str(mpls_pw_types_values, 809 "unknown", 810 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->encapsulation)), 811 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_endpt->encapsulation)); 812 } 813 break; 814 815 /* the old L2VPN VCID subTLV does not have support for the sender field */ 816 case LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW_OLD: 817 /* Is the subTLV length correct? */ 818 if (lspping_subtlv_len != 10) { 819 ND_PRINT("\n\t invalid subTLV length, should be 10"); 820 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ 821 } else { 822 subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old = 823 (const struct lspping_tlv_targetfec_subtlv_fec_128_pw_old *)subtlv_tptr; 824 ND_PRINT("\n\t Remote PE: %s" 825 "\n\t PW ID: 0x%08x, PW Type: %s (%u)", 826 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->remote_pe_address), 827 GET_BE_U_4(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_id), 828 tok2str(mpls_pw_types_values, 829 "unknown", 830 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_type)), 831 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid_old->pw_type)); 832 } 833 break; 834 835 case LSPPING_TLV_TARGETFEC_SUBTLV_FEC_128_PW: 836 /* Is the subTLV length correct? */ 837 if (lspping_subtlv_len != 14) { 838 ND_PRINT("\n\t invalid subTLV length, should be 14"); 839 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ 840 } else { 841 subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid = 842 (const struct lspping_tlv_targetfec_subtlv_fec_128_pw *)subtlv_tptr; 843 ND_PRINT("\n\t Sender PE: %s, Remote PE: %s" 844 "\n\t PW ID: 0x%08x, PW Type: %s (%u)", 845 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->sender_pe_address), 846 GET_IPADDR_STRING(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->remote_pe_address), 847 GET_BE_U_4(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_id), 848 tok2str(mpls_pw_types_values, 849 "unknown", 850 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_type)), 851 GET_BE_U_2(subtlv_ptr.lspping_tlv_targetfec_subtlv_l2vpn_vcid->pw_type)); 852 } 853 break; 854 855 default: 856 subtlv_hexdump=TRUE; /* unknown subTLV just hexdump it */ 857 break; 858 } 859 /* do we want to see an additionally subtlv hexdump ? */ 860 if (ndo->ndo_vflag > 1 || subtlv_hexdump==TRUE) 861 print_unknown_data(ndo, tlv_tptr+sizeof(struct lspping_tlv_header), 862 "\n\t ", 863 lspping_subtlv_len); 864 865 /* All subTLVs are aligned to four octet boundary */ 866 if (lspping_subtlv_len % 4) { 867 lspping_subtlv_len += 4 - (lspping_subtlv_len % 4); 868 /* Does the subTLV, including padding, go past the end of the TLV? */ 869 if (tlv_tlen < lspping_subtlv_len+sizeof(struct lspping_tlv_header)) { 870 ND_PRINT("\n\t\t TLV is too short"); 871 return; 872 } 873 } 874 tlv_tptr+=lspping_subtlv_len; 875 tlv_tlen-=lspping_subtlv_len+sizeof(struct lspping_tlv_header); 876 } 877 break; 878 879 case LSPPING_TLV_DOWNSTREAM_MAPPING: 880 /* Does the header go past the end of the TLV? */ 881 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_t)) { 882 ND_PRINT("\n\t TLV is too short"); 883 tlv_hexdump = TRUE; 884 goto tlv_tooshort; 885 } 886 /* Did we capture enough to get the address family? */ 887 ND_TCHECK_LEN(tlv_tptr, 888 sizeof(struct lspping_tlv_downstream_map_t)); 889 890 tlv_ptr.lspping_tlv_downstream_map= 891 (const struct lspping_tlv_downstream_map_t *)tlv_tptr; 892 893 /* that strange thing with the downstream map TLV is that until now 894 * we do not know if its IPv4 or IPv6 or is unnumbered; after 895 * we find the address-type, we recast the tlv_tptr and move on. */ 896 897 address_type = GET_U_1(tlv_ptr.lspping_tlv_downstream_map->address_type); 898 ND_PRINT("\n\t MTU: %u, Address-Type: %s (%u)", 899 GET_BE_U_2(tlv_ptr.lspping_tlv_downstream_map->mtu), 900 tok2str(lspping_tlv_downstream_addr_values, 901 "unknown", 902 address_type), 903 address_type); 904 905 switch(address_type) { 906 907 case LSPPING_AFI_IPV4: 908 /* Does the data go past the end of the TLV? */ 909 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv4_t)) { 910 ND_PRINT("\n\t TLV is too short"); 911 tlv_hexdump = TRUE; 912 goto tlv_tooshort; 913 } 914 /* Did we capture enough for this part of the TLV? */ 915 ND_TCHECK_LEN(tlv_tptr, 916 sizeof(struct lspping_tlv_downstream_map_ipv4_t)); 917 918 tlv_ptr.lspping_tlv_downstream_map_ipv4= 919 (const struct lspping_tlv_downstream_map_ipv4_t *)tlv_tptr; 920 ND_PRINT("\n\t Downstream IP: %s" 921 "\n\t Downstream Interface IP: %s", 922 GET_IPADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv4->downstream_ip), 923 GET_IPADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv4->downstream_interface)); 924 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv4_t); 925 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv4_t); 926 break; 927 case LSPPING_AFI_IPV4_UNMB: 928 /* Does the data go past the end of the TLV? */ 929 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t)) { 930 ND_PRINT("\n\t TLV is too short"); 931 tlv_hexdump = TRUE; 932 goto tlv_tooshort; 933 } 934 /* Did we capture enough for this part of the TLV? */ 935 ND_TCHECK_LEN(tlv_tptr, 936 sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t)); 937 938 tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb= 939 (const struct lspping_tlv_downstream_map_ipv4_unmb_t *)tlv_tptr; 940 ND_PRINT("\n\t Downstream IP: %s" 941 "\n\t Downstream Interface Index: 0x%08x", 942 GET_IPADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb->downstream_ip), 943 GET_BE_U_4(tlv_ptr.lspping_tlv_downstream_map_ipv4_unmb->downstream_interface)); 944 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t); 945 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv4_unmb_t); 946 break; 947 case LSPPING_AFI_IPV6: 948 /* Does the data go past the end of the TLV? */ 949 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv6_t)) { 950 ND_PRINT("\n\t TLV is too short"); 951 tlv_hexdump = TRUE; 952 goto tlv_tooshort; 953 } 954 /* Did we capture enough for this part of the TLV? */ 955 ND_TCHECK_LEN(tlv_tptr, 956 sizeof(struct lspping_tlv_downstream_map_ipv6_t)); 957 958 tlv_ptr.lspping_tlv_downstream_map_ipv6= 959 (const struct lspping_tlv_downstream_map_ipv6_t *)tlv_tptr; 960 ND_PRINT("\n\t Downstream IP: %s" 961 "\n\t Downstream Interface IP: %s", 962 GET_IP6ADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv6->downstream_ip), 963 GET_IP6ADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv6->downstream_interface)); 964 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv6_t); 965 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv6_t); 966 break; 967 case LSPPING_AFI_IPV6_UNMB: 968 /* Does the data go past the end of the TLV? */ 969 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t)) { 970 ND_PRINT("\n\t TLV is too short"); 971 tlv_hexdump = TRUE; 972 goto tlv_tooshort; 973 } 974 /* Did we capture enough for this part of the TLV? */ 975 ND_TCHECK_LEN(tlv_tptr, 976 sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t)); 977 978 tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb= 979 (const struct lspping_tlv_downstream_map_ipv6_unmb_t *)tlv_tptr; 980 ND_PRINT("\n\t Downstream IP: %s" 981 "\n\t Downstream Interface Index: 0x%08x", 982 GET_IP6ADDR_STRING(tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb->downstream_ip), 983 GET_BE_U_4(tlv_ptr.lspping_tlv_downstream_map_ipv6_unmb->downstream_interface)); 984 tlv_tptr+=sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t); 985 tlv_tlen-=sizeof(struct lspping_tlv_downstream_map_ipv6_unmb_t); 986 break; 987 988 default: 989 /* should not happen ! - no error message - tok2str() has barked already */ 990 break; 991 } 992 993 /* Does the data go past the end of the TLV? */ 994 if (tlv_tlen < sizeof(struct lspping_tlv_downstream_map_info_t)) { 995 ND_PRINT("\n\t TLV is too short"); 996 tlv_hexdump = TRUE; 997 goto tlv_tooshort; 998 } 999 /* Did we capture enough for this part of the TLV? */ 1000 ND_TCHECK_LEN(tlv_tptr, 1001 sizeof(struct lspping_tlv_downstream_map_info_t)); 1002 1003 tlv_ptr.lspping_tlv_downstream_map_info= 1004 (const struct lspping_tlv_downstream_map_info_t *)tlv_tptr; 1005 1006 /* FIXME add hash-key type, depth limit, multipath processing */ 1007 1008 /* FIXME print downstream labels */ 1009 1010 tlv_hexdump=TRUE; /* dump the TLV until code complete */ 1011 1012 break; 1013 1014 case LSPPING_TLV_BFD_DISCRIMINATOR: 1015 if (tlv_tlen < LSPPING_TLV_BFD_DISCRIMINATOR_LEN) { 1016 ND_PRINT("\n\t TLV is too short"); 1017 tlv_hexdump = TRUE; 1018 goto tlv_tooshort; 1019 } else { 1020 ND_PRINT("\n\t BFD Discriminator 0x%08x", GET_BE_U_4(tlv_tptr)); 1021 } 1022 break; 1023 1024 case LSPPING_TLV_VENDOR_ENTERPRISE: 1025 { 1026 uint32_t vendor_id; 1027 1028 if (tlv_tlen < LSPPING_TLV_VENDOR_ENTERPRISE_LEN) { 1029 ND_PRINT("\n\t TLV is too short"); 1030 tlv_hexdump = TRUE; 1031 goto tlv_tooshort; 1032 } else { 1033 vendor_id = GET_BE_U_4(tlv_tptr); 1034 ND_PRINT("\n\t Vendor: %s (0x%04x)", 1035 tok2str(smi_values, "Unknown", vendor_id), 1036 vendor_id); 1037 } 1038 } 1039 break; 1040 1041 /* 1042 * FIXME those are the defined TLVs that lack a decoder 1043 * you are welcome to contribute code ;-) 1044 */ 1045 case LSPPING_TLV_PAD: 1046 case LSPPING_TLV_ERROR_CODE: 1047 case LSPPING_TLV_VENDOR_PRIVATE: 1048 1049 default: 1050 if (ndo->ndo_vflag <= 1) 1051 print_unknown_data(ndo, tlv_tptr, "\n\t ", tlv_tlen); 1052 break; 1053 } 1054 /* do we want to see an additionally tlv hexdump ? */ 1055 tlv_tooshort: 1056 if (ndo->ndo_vflag > 1 || tlv_hexdump==TRUE) 1057 print_unknown_data(ndo, tptr+sizeof(struct lspping_tlv_header), "\n\t ", 1058 lspping_tlv_len); 1059 1060 1061 /* All TLVs are aligned to four octet boundary */ 1062 if (lspping_tlv_len % 4) { 1063 lspping_tlv_len += (4 - lspping_tlv_len % 4); 1064 /* Does the TLV, including padding, go past the end of the packet? */ 1065 if (tlen < lspping_tlv_len+sizeof(struct lspping_tlv_header)) 1066 goto tooshort; 1067 } 1068 1069 tptr+=lspping_tlv_len+sizeof(struct lspping_tlv_header); 1070 tlen-=lspping_tlv_len+sizeof(struct lspping_tlv_header); 1071 } 1072 return; 1073 tooshort: 1074 ND_PRINT("\n\t\t packet is too short"); 1075 } 1076