1 /* 2 * Copyright (c) 1998-2007 The TCPDUMP project 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that: (1) source code 6 * distributions retain the above copyright notice and this paragraph 7 * in its entirety, and (2) distributions including binary code include 8 * the above copyright notice and this paragraph in its entirety in 9 * the documentation or other materials provided with the distribution. 10 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND 11 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT 12 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 13 * FOR A PARTICULAR PURPOSE. 14 * 15 * The SFLOW protocol as per http://www.sflow.org/developers/specifications.php 16 * 17 * Original code by Carles Kishimoto <carles.kishimoto (at) gmail.com> 18 * 19 * Expansion and refactoring by Rick Jones <rick.jones2 (at) hp.com> 20 */ 21 22 #define NETDISSECT_REWORKED 23 #ifdef HAVE_CONFIG_H 24 #include "config.h" 25 #endif 26 27 #include <tcpdump-stdinc.h> 28 29 #include "interface.h" 30 #include "extract.h" 31 #include "addrtoname.h" 32 33 /* 34 * sFlow datagram 35 * 36 * 0 1 2 3 37 * 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 38 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 39 * | Sflow version (2,4,5) | 40 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 41 * | IP version (1 for IPv4 | 2 for IPv6) | 42 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 43 * | IP Address AGENT (4 or 16 bytes) | 44 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 45 * | Sub agent ID | 46 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 47 * | Datagram sequence number | 48 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 49 * | Switch uptime in ms | 50 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 51 * | num samples in datagram | 52 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 53 * 54 */ 55 56 struct sflow_datagram_t { 57 uint8_t version[4]; 58 uint8_t ip_version[4]; 59 uint8_t agent[4]; 60 uint8_t agent_id[4]; 61 uint8_t seqnum[4]; 62 uint8_t uptime[4]; 63 uint8_t samples[4]; 64 }; 65 66 struct sflow_sample_header { 67 uint8_t format[4]; 68 uint8_t len[4]; 69 }; 70 71 #define SFLOW_FLOW_SAMPLE 1 72 #define SFLOW_COUNTER_SAMPLE 2 73 #define SFLOW_EXPANDED_FLOW_SAMPLE 3 74 #define SFLOW_EXPANDED_COUNTER_SAMPLE 4 75 76 static const struct tok sflow_format_values[] = { 77 { SFLOW_FLOW_SAMPLE, "flow sample" }, 78 { SFLOW_COUNTER_SAMPLE, "counter sample" }, 79 { SFLOW_EXPANDED_FLOW_SAMPLE, "expanded flow sample" }, 80 { SFLOW_EXPANDED_COUNTER_SAMPLE, "expanded counter sample" }, 81 { 0, NULL} 82 }; 83 84 struct sflow_flow_sample_t { 85 uint8_t seqnum[4]; 86 uint8_t typesource[4]; 87 uint8_t rate[4]; 88 uint8_t pool[4]; 89 uint8_t drops[4]; 90 uint8_t in_interface[4]; 91 uint8_t out_interface[4]; 92 uint8_t records[4]; 93 94 }; 95 96 struct sflow_expanded_flow_sample_t { 97 uint8_t seqnum[4]; 98 uint8_t type[4]; 99 uint8_t index[4]; 100 uint8_t rate[4]; 101 uint8_t pool[4]; 102 uint8_t drops[4]; 103 uint8_t in_interface_format[4]; 104 uint8_t in_interface_value[4]; 105 uint8_t out_interface_format[4]; 106 uint8_t out_interface_value[4]; 107 uint8_t records[4]; 108 }; 109 110 #define SFLOW_FLOW_RAW_PACKET 1 111 #define SFLOW_FLOW_ETHERNET_FRAME 2 112 #define SFLOW_FLOW_IPV4_DATA 3 113 #define SFLOW_FLOW_IPV6_DATA 4 114 #define SFLOW_FLOW_EXTENDED_SWITCH_DATA 1001 115 #define SFLOW_FLOW_EXTENDED_ROUTER_DATA 1002 116 #define SFLOW_FLOW_EXTENDED_GATEWAY_DATA 1003 117 #define SFLOW_FLOW_EXTENDED_USER_DATA 1004 118 #define SFLOW_FLOW_EXTENDED_URL_DATA 1005 119 #define SFLOW_FLOW_EXTENDED_MPLS_DATA 1006 120 #define SFLOW_FLOW_EXTENDED_NAT_DATA 1007 121 #define SFLOW_FLOW_EXTENDED_MPLS_TUNNEL 1008 122 #define SFLOW_FLOW_EXTENDED_MPLS_VC 1009 123 #define SFLOW_FLOW_EXTENDED_MPLS_FEC 1010 124 #define SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC 1011 125 #define SFLOW_FLOW_EXTENDED_VLAN_TUNNEL 1012 126 127 static const struct tok sflow_flow_type_values[] = { 128 { SFLOW_FLOW_RAW_PACKET, "Raw packet"}, 129 { SFLOW_FLOW_ETHERNET_FRAME, "Ethernet frame"}, 130 { SFLOW_FLOW_IPV4_DATA, "IPv4 Data"}, 131 { SFLOW_FLOW_IPV6_DATA, "IPv6 Data"}, 132 { SFLOW_FLOW_EXTENDED_SWITCH_DATA, "Extended Switch data"}, 133 { SFLOW_FLOW_EXTENDED_ROUTER_DATA, "Extended Router data"}, 134 { SFLOW_FLOW_EXTENDED_GATEWAY_DATA, "Extended Gateway data"}, 135 { SFLOW_FLOW_EXTENDED_USER_DATA, "Extended User data"}, 136 { SFLOW_FLOW_EXTENDED_URL_DATA, "Extended URL data"}, 137 { SFLOW_FLOW_EXTENDED_MPLS_DATA, "Extended MPLS data"}, 138 { SFLOW_FLOW_EXTENDED_NAT_DATA, "Extended NAT data"}, 139 { SFLOW_FLOW_EXTENDED_MPLS_TUNNEL, "Extended MPLS tunnel"}, 140 { SFLOW_FLOW_EXTENDED_MPLS_VC, "Extended MPLS VC"}, 141 { SFLOW_FLOW_EXTENDED_MPLS_FEC, "Extended MPLS FEC"}, 142 { SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC, "Extended MPLS LVP FEC"}, 143 { SFLOW_FLOW_EXTENDED_VLAN_TUNNEL, "Extended VLAN Tunnel"}, 144 { 0, NULL} 145 }; 146 147 #define SFLOW_HEADER_PROTOCOL_ETHERNET 1 148 #define SFLOW_HEADER_PROTOCOL_IPV4 11 149 #define SFLOW_HEADER_PROTOCOL_IPV6 12 150 151 static const struct tok sflow_flow_raw_protocol_values[] = { 152 { SFLOW_HEADER_PROTOCOL_ETHERNET, "Ethernet"}, 153 { SFLOW_HEADER_PROTOCOL_IPV4, "IPv4"}, 154 { SFLOW_HEADER_PROTOCOL_IPV6, "IPv6"}, 155 { 0, NULL} 156 }; 157 158 struct sflow_expanded_flow_raw_t { 159 uint8_t protocol[4]; 160 uint8_t length[4]; 161 uint8_t stripped_bytes[4]; 162 uint8_t header_size[4]; 163 }; 164 165 struct sflow_ethernet_frame_t { 166 uint8_t length[4]; 167 uint8_t src_mac[8]; 168 uint8_t dst_mac[8]; 169 uint8_t type[4]; 170 }; 171 172 struct sflow_extended_switch_data_t { 173 uint8_t src_vlan[4]; 174 uint8_t src_pri[4]; 175 uint8_t dst_vlan[4]; 176 uint8_t dst_pri[4]; 177 }; 178 179 struct sflow_counter_record_t { 180 uint8_t format[4]; 181 uint8_t length[4]; 182 }; 183 184 struct sflow_flow_record_t { 185 uint8_t format[4]; 186 uint8_t length[4]; 187 }; 188 189 struct sflow_counter_sample_t { 190 uint8_t seqnum[4]; 191 uint8_t typesource[4]; 192 uint8_t records[4]; 193 }; 194 195 struct sflow_expanded_counter_sample_t { 196 uint8_t seqnum[4]; 197 uint8_t type[4]; 198 uint8_t index[4]; 199 uint8_t records[4]; 200 }; 201 202 #define SFLOW_COUNTER_GENERIC 1 203 #define SFLOW_COUNTER_ETHERNET 2 204 #define SFLOW_COUNTER_TOKEN_RING 3 205 #define SFLOW_COUNTER_BASEVG 4 206 #define SFLOW_COUNTER_VLAN 5 207 #define SFLOW_COUNTER_PROCESSOR 1001 208 209 static const struct tok sflow_counter_type_values[] = { 210 { SFLOW_COUNTER_GENERIC, "Generic counter"}, 211 { SFLOW_COUNTER_ETHERNET, "Ethernet counter"}, 212 { SFLOW_COUNTER_TOKEN_RING, "Token ring counter"}, 213 { SFLOW_COUNTER_BASEVG, "100 BaseVG counter"}, 214 { SFLOW_COUNTER_VLAN, "Vlan counter"}, 215 { SFLOW_COUNTER_PROCESSOR, "Processor counter"}, 216 { 0, NULL} 217 }; 218 219 #define SFLOW_IFACE_DIRECTION_UNKNOWN 0 220 #define SFLOW_IFACE_DIRECTION_FULLDUPLEX 1 221 #define SFLOW_IFACE_DIRECTION_HALFDUPLEX 2 222 #define SFLOW_IFACE_DIRECTION_IN 3 223 #define SFLOW_IFACE_DIRECTION_OUT 4 224 225 static const struct tok sflow_iface_direction_values[] = { 226 { SFLOW_IFACE_DIRECTION_UNKNOWN, "unknown"}, 227 { SFLOW_IFACE_DIRECTION_FULLDUPLEX, "full-duplex"}, 228 { SFLOW_IFACE_DIRECTION_HALFDUPLEX, "half-duplex"}, 229 { SFLOW_IFACE_DIRECTION_IN, "in"}, 230 { SFLOW_IFACE_DIRECTION_OUT, "out"}, 231 { 0, NULL} 232 }; 233 234 struct sflow_generic_counter_t { 235 uint8_t ifindex[4]; 236 uint8_t iftype[4]; 237 uint8_t ifspeed[8]; 238 uint8_t ifdirection[4]; 239 uint8_t ifstatus[4]; 240 uint8_t ifinoctets[8]; 241 uint8_t ifinunicastpkts[4]; 242 uint8_t ifinmulticastpkts[4]; 243 uint8_t ifinbroadcastpkts[4]; 244 uint8_t ifindiscards[4]; 245 uint8_t ifinerrors[4]; 246 uint8_t ifinunkownprotos[4]; 247 uint8_t ifoutoctets[8]; 248 uint8_t ifoutunicastpkts[4]; 249 uint8_t ifoutmulticastpkts[4]; 250 uint8_t ifoutbroadcastpkts[4]; 251 uint8_t ifoutdiscards[4]; 252 uint8_t ifouterrors[4]; 253 uint8_t ifpromiscmode[4]; 254 }; 255 256 struct sflow_ethernet_counter_t { 257 uint8_t alignerrors[4]; 258 uint8_t fcserrors[4]; 259 uint8_t single_collision_frames[4]; 260 uint8_t multiple_collision_frames[4]; 261 uint8_t test_errors[4]; 262 uint8_t deferred_transmissions[4]; 263 uint8_t late_collisions[4]; 264 uint8_t excessive_collisions[4]; 265 uint8_t mac_transmit_errors[4]; 266 uint8_t carrier_sense_errors[4]; 267 uint8_t frame_too_longs[4]; 268 uint8_t mac_receive_errors[4]; 269 uint8_t symbol_errors[4]; 270 }; 271 272 struct sflow_100basevg_counter_t { 273 uint8_t in_highpriority_frames[4]; 274 uint8_t in_highpriority_octets[8]; 275 uint8_t in_normpriority_frames[4]; 276 uint8_t in_normpriority_octets[8]; 277 uint8_t in_ipmerrors[4]; 278 uint8_t in_oversized[4]; 279 uint8_t in_data_errors[4]; 280 uint8_t in_null_addressed_frames[4]; 281 uint8_t out_highpriority_frames[4]; 282 uint8_t out_highpriority_octets[8]; 283 uint8_t transitioninto_frames[4]; 284 uint8_t hc_in_highpriority_octets[8]; 285 uint8_t hc_in_normpriority_octets[8]; 286 uint8_t hc_out_highpriority_octets[8]; 287 }; 288 289 struct sflow_vlan_counter_t { 290 uint8_t vlan_id[4]; 291 uint8_t octets[8]; 292 uint8_t unicast_pkt[4]; 293 uint8_t multicast_pkt[4]; 294 uint8_t broadcast_pkt[4]; 295 uint8_t discards[4]; 296 }; 297 298 static int 299 print_sflow_counter_generic(netdissect_options *ndo, 300 const u_char *pointer, u_int len) 301 { 302 const struct sflow_generic_counter_t *sflow_gen_counter; 303 304 if (len < sizeof(struct sflow_generic_counter_t)) 305 return 1; 306 307 308 sflow_gen_counter = (const struct sflow_generic_counter_t *)pointer; 309 ND_PRINT((ndo, "\n\t ifindex %u, iftype %u, ifspeed %" PRIu64 ", ifdirection %u (%s)", 310 EXTRACT_32BITS(sflow_gen_counter->ifindex), 311 EXTRACT_32BITS(sflow_gen_counter->iftype), 312 EXTRACT_64BITS(sflow_gen_counter->ifspeed), 313 EXTRACT_32BITS(sflow_gen_counter->ifdirection), 314 tok2str(sflow_iface_direction_values, "Unknown", 315 EXTRACT_32BITS(sflow_gen_counter->ifdirection)))); 316 ND_PRINT((ndo, "\n\t ifstatus %u, adminstatus: %s, operstatus: %s", 317 EXTRACT_32BITS(sflow_gen_counter->ifstatus), 318 EXTRACT_32BITS(sflow_gen_counter->ifstatus)&1 ? "up" : "down", 319 (EXTRACT_32BITS(sflow_gen_counter->ifstatus)>>1)&1 ? "up" : "down")); 320 ND_PRINT((ndo, "\n\t In octets %" PRIu64 321 ", unicast pkts %u, multicast pkts %u, broadcast pkts %u, discards %u", 322 EXTRACT_64BITS(sflow_gen_counter->ifinoctets), 323 EXTRACT_32BITS(sflow_gen_counter->ifinunicastpkts), 324 EXTRACT_32BITS(sflow_gen_counter->ifinmulticastpkts), 325 EXTRACT_32BITS(sflow_gen_counter->ifinbroadcastpkts), 326 EXTRACT_32BITS(sflow_gen_counter->ifindiscards))); 327 ND_PRINT((ndo, "\n\t In errors %u, unknown protos %u", 328 EXTRACT_32BITS(sflow_gen_counter->ifinerrors), 329 EXTRACT_32BITS(sflow_gen_counter->ifinunkownprotos))); 330 ND_PRINT((ndo, "\n\t Out octets %" PRIu64 331 ", unicast pkts %u, multicast pkts %u, broadcast pkts %u, discards %u", 332 EXTRACT_64BITS(sflow_gen_counter->ifoutoctets), 333 EXTRACT_32BITS(sflow_gen_counter->ifoutunicastpkts), 334 EXTRACT_32BITS(sflow_gen_counter->ifoutmulticastpkts), 335 EXTRACT_32BITS(sflow_gen_counter->ifoutbroadcastpkts), 336 EXTRACT_32BITS(sflow_gen_counter->ifoutdiscards))); 337 ND_PRINT((ndo, "\n\t Out errors %u, promisc mode %u", 338 EXTRACT_32BITS(sflow_gen_counter->ifouterrors), 339 EXTRACT_32BITS(sflow_gen_counter->ifpromiscmode))); 340 341 return 0; 342 } 343 344 static int 345 print_sflow_counter_ethernet(netdissect_options *ndo, 346 const u_char *pointer, u_int len) 347 { 348 const struct sflow_ethernet_counter_t *sflow_eth_counter; 349 350 if (len < sizeof(struct sflow_ethernet_counter_t)) 351 return 1; 352 353 sflow_eth_counter = (const struct sflow_ethernet_counter_t *)pointer; 354 ND_PRINT((ndo, "\n\t align errors %u, fcs errors %u, single collision %u, multiple collision %u, test error %u", 355 EXTRACT_32BITS(sflow_eth_counter->alignerrors), 356 EXTRACT_32BITS(sflow_eth_counter->fcserrors), 357 EXTRACT_32BITS(sflow_eth_counter->single_collision_frames), 358 EXTRACT_32BITS(sflow_eth_counter->multiple_collision_frames), 359 EXTRACT_32BITS(sflow_eth_counter->test_errors))); 360 ND_PRINT((ndo, "\n\t deferred %u, late collision %u, excessive collision %u, mac trans error %u", 361 EXTRACT_32BITS(sflow_eth_counter->deferred_transmissions), 362 EXTRACT_32BITS(sflow_eth_counter->late_collisions), 363 EXTRACT_32BITS(sflow_eth_counter->excessive_collisions), 364 EXTRACT_32BITS(sflow_eth_counter->mac_transmit_errors))); 365 ND_PRINT((ndo, "\n\t carrier error %u, frames too long %u, mac receive errors %u, symbol errors %u", 366 EXTRACT_32BITS(sflow_eth_counter->carrier_sense_errors), 367 EXTRACT_32BITS(sflow_eth_counter->frame_too_longs), 368 EXTRACT_32BITS(sflow_eth_counter->mac_receive_errors), 369 EXTRACT_32BITS(sflow_eth_counter->symbol_errors))); 370 371 return 0; 372 } 373 374 static int 375 print_sflow_counter_token_ring(netdissect_options *ndo _U_, 376 const u_char *pointer _U_, u_int len _U_) 377 { 378 return 0; 379 } 380 381 static int 382 print_sflow_counter_basevg(netdissect_options *ndo, 383 const u_char *pointer, u_int len) 384 { 385 const struct sflow_100basevg_counter_t *sflow_100basevg_counter; 386 387 if (len < sizeof(struct sflow_100basevg_counter_t)) 388 return 1; 389 390 sflow_100basevg_counter = (const struct sflow_100basevg_counter_t *)pointer; 391 ND_PRINT((ndo, "\n\t in high prio frames %u, in high prio octets %" PRIu64, 392 EXTRACT_32BITS(sflow_100basevg_counter->in_highpriority_frames), 393 EXTRACT_64BITS(sflow_100basevg_counter->in_highpriority_octets))); 394 ND_PRINT((ndo, "\n\t in norm prio frames %u, in norm prio octets %" PRIu64, 395 EXTRACT_32BITS(sflow_100basevg_counter->in_normpriority_frames), 396 EXTRACT_64BITS(sflow_100basevg_counter->in_normpriority_octets))); 397 ND_PRINT((ndo, "\n\t in ipm errors %u, oversized %u, in data errors %u, null addressed frames %u", 398 EXTRACT_32BITS(sflow_100basevg_counter->in_ipmerrors), 399 EXTRACT_32BITS(sflow_100basevg_counter->in_oversized), 400 EXTRACT_32BITS(sflow_100basevg_counter->in_data_errors), 401 EXTRACT_32BITS(sflow_100basevg_counter->in_null_addressed_frames))); 402 ND_PRINT((ndo, "\n\t out high prio frames %u, out high prio octets %" PRIu64 403 ", trans into frames %u", 404 EXTRACT_32BITS(sflow_100basevg_counter->out_highpriority_frames), 405 EXTRACT_64BITS(sflow_100basevg_counter->out_highpriority_octets), 406 EXTRACT_32BITS(sflow_100basevg_counter->transitioninto_frames))); 407 ND_PRINT((ndo, "\n\t in hc high prio octets %" PRIu64 408 ", in hc norm prio octets %" PRIu64 409 ", out hc high prio octets %" PRIu64, 410 EXTRACT_64BITS(sflow_100basevg_counter->hc_in_highpriority_octets), 411 EXTRACT_64BITS(sflow_100basevg_counter->hc_in_normpriority_octets), 412 EXTRACT_64BITS(sflow_100basevg_counter->hc_out_highpriority_octets))); 413 414 return 0; 415 } 416 417 static int 418 print_sflow_counter_vlan(netdissect_options *ndo, 419 const u_char *pointer, u_int len) 420 { 421 const struct sflow_vlan_counter_t *sflow_vlan_counter; 422 423 if (len < sizeof(struct sflow_vlan_counter_t)) 424 return 1; 425 426 sflow_vlan_counter = (const struct sflow_vlan_counter_t *)pointer; 427 ND_PRINT((ndo, "\n\t vlan_id %u, octets %" PRIu64 428 ", unicast_pkt %u, multicast_pkt %u, broadcast_pkt %u, discards %u", 429 EXTRACT_32BITS(sflow_vlan_counter->vlan_id), 430 EXTRACT_64BITS(sflow_vlan_counter->octets), 431 EXTRACT_32BITS(sflow_vlan_counter->unicast_pkt), 432 EXTRACT_32BITS(sflow_vlan_counter->multicast_pkt), 433 EXTRACT_32BITS(sflow_vlan_counter->broadcast_pkt), 434 EXTRACT_32BITS(sflow_vlan_counter->discards))); 435 436 return 0; 437 } 438 439 struct sflow_processor_counter_t { 440 uint8_t five_sec_util[4]; 441 uint8_t one_min_util[4]; 442 uint8_t five_min_util[4]; 443 uint8_t total_memory[8]; 444 uint8_t free_memory[8]; 445 }; 446 447 static int 448 print_sflow_counter_processor(netdissect_options *ndo, 449 const u_char *pointer, u_int len) 450 { 451 const struct sflow_processor_counter_t *sflow_processor_counter; 452 453 if (len < sizeof(struct sflow_processor_counter_t)) 454 return 1; 455 456 sflow_processor_counter = (const struct sflow_processor_counter_t *)pointer; 457 ND_PRINT((ndo, "\n\t 5sec %u, 1min %u, 5min %u, total_mem %" PRIu64 458 ", total_mem %" PRIu64, 459 EXTRACT_32BITS(sflow_processor_counter->five_sec_util), 460 EXTRACT_32BITS(sflow_processor_counter->one_min_util), 461 EXTRACT_32BITS(sflow_processor_counter->five_min_util), 462 EXTRACT_64BITS(sflow_processor_counter->total_memory), 463 EXTRACT_64BITS(sflow_processor_counter->free_memory))); 464 465 return 0; 466 } 467 468 static int 469 sflow_print_counter_records(netdissect_options *ndo, 470 const u_char *pointer, u_int len, u_int records) 471 { 472 u_int nrecords; 473 const u_char *tptr; 474 u_int tlen; 475 u_int counter_type; 476 u_int counter_len; 477 u_int enterprise; 478 const struct sflow_counter_record_t *sflow_counter_record; 479 480 nrecords = records; 481 tptr = pointer; 482 tlen = len; 483 484 while (nrecords > 0) { 485 /* do we have the "header?" */ 486 if (tlen < sizeof(struct sflow_counter_record_t)) 487 return 1; 488 sflow_counter_record = (const struct sflow_counter_record_t *)tptr; 489 490 enterprise = EXTRACT_32BITS(sflow_counter_record->format); 491 counter_type = enterprise & 0x0FFF; 492 enterprise = enterprise >> 20; 493 counter_len = EXTRACT_32BITS(sflow_counter_record->length); 494 ND_PRINT((ndo, "\n\t enterprise %u, %s (%u) length %u", 495 enterprise, 496 (enterprise == 0) ? tok2str(sflow_counter_type_values,"Unknown",counter_type) : "Unknown", 497 counter_type, 498 counter_len)); 499 500 tptr += sizeof(struct sflow_counter_record_t); 501 tlen -= sizeof(struct sflow_counter_record_t); 502 503 if (tlen < counter_len) 504 return 1; 505 if (enterprise == 0) { 506 switch (counter_type) { 507 case SFLOW_COUNTER_GENERIC: 508 if (print_sflow_counter_generic(ndo, tptr, tlen)) 509 return 1; 510 break; 511 case SFLOW_COUNTER_ETHERNET: 512 if (print_sflow_counter_ethernet(ndo, tptr, tlen)) 513 return 1; 514 break; 515 case SFLOW_COUNTER_TOKEN_RING: 516 if (print_sflow_counter_token_ring(ndo, tptr,tlen)) 517 return 1; 518 break; 519 case SFLOW_COUNTER_BASEVG: 520 if (print_sflow_counter_basevg(ndo, tptr, tlen)) 521 return 1; 522 break; 523 case SFLOW_COUNTER_VLAN: 524 if (print_sflow_counter_vlan(ndo, tptr, tlen)) 525 return 1; 526 break; 527 case SFLOW_COUNTER_PROCESSOR: 528 if (print_sflow_counter_processor(ndo, tptr, tlen)) 529 return 1; 530 break; 531 default: 532 if (ndo->ndo_vflag <= 1) 533 print_unknown_data(ndo, tptr, "\n\t\t", counter_len); 534 break; 535 } 536 } 537 tptr += counter_len; 538 tlen -= counter_len; 539 nrecords--; 540 541 } 542 543 return 0; 544 } 545 546 static int 547 sflow_print_counter_sample(netdissect_options *ndo, 548 const u_char *pointer, u_int len) 549 { 550 const struct sflow_counter_sample_t *sflow_counter_sample; 551 u_int nrecords; 552 u_int typesource; 553 u_int type; 554 u_int index; 555 556 557 if (len < sizeof(struct sflow_counter_sample_t)) 558 return 1; 559 560 sflow_counter_sample = (const struct sflow_counter_sample_t *)pointer; 561 562 typesource = EXTRACT_32BITS(sflow_counter_sample->typesource); 563 nrecords = EXTRACT_32BITS(sflow_counter_sample->records); 564 type = typesource >> 24; 565 index = typesource & 0x0FFF; 566 567 ND_PRINT((ndo, " seqnum %u, type %u, idx %u, records %u", 568 EXTRACT_32BITS(sflow_counter_sample->seqnum), 569 type, 570 index, 571 nrecords)); 572 573 return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_counter_sample_t), 574 len - sizeof(struct sflow_counter_sample_t), 575 nrecords); 576 577 } 578 579 static int 580 sflow_print_expanded_counter_sample(netdissect_options *ndo, 581 const u_char *pointer, u_int len) 582 { 583 const struct sflow_expanded_counter_sample_t *sflow_expanded_counter_sample; 584 u_int nrecords; 585 586 587 if (len < sizeof(struct sflow_expanded_counter_sample_t)) 588 return 1; 589 590 sflow_expanded_counter_sample = (const struct sflow_expanded_counter_sample_t *)pointer; 591 592 nrecords = EXTRACT_32BITS(sflow_expanded_counter_sample->records); 593 594 ND_PRINT((ndo, " seqnum %u, type %u, idx %u, records %u", 595 EXTRACT_32BITS(sflow_expanded_counter_sample->seqnum), 596 EXTRACT_32BITS(sflow_expanded_counter_sample->type), 597 EXTRACT_32BITS(sflow_expanded_counter_sample->index), 598 nrecords)); 599 600 return sflow_print_counter_records(ndo, pointer + sizeof(struct sflow_expanded_counter_sample_t), 601 len - sizeof(struct sflow_expanded_counter_sample_t), 602 nrecords); 603 604 } 605 606 static int 607 print_sflow_raw_packet(netdissect_options *ndo, 608 const u_char *pointer, u_int len) 609 { 610 const struct sflow_expanded_flow_raw_t *sflow_flow_raw; 611 612 if (len < sizeof(struct sflow_expanded_flow_raw_t)) 613 return 1; 614 615 sflow_flow_raw = (const struct sflow_expanded_flow_raw_t *)pointer; 616 ND_PRINT((ndo, "\n\t protocol %s (%u), length %u, stripped bytes %u, header_size %u", 617 tok2str(sflow_flow_raw_protocol_values,"Unknown",EXTRACT_32BITS(sflow_flow_raw->protocol)), 618 EXTRACT_32BITS(sflow_flow_raw->protocol), 619 EXTRACT_32BITS(sflow_flow_raw->length), 620 EXTRACT_32BITS(sflow_flow_raw->stripped_bytes), 621 EXTRACT_32BITS(sflow_flow_raw->header_size))); 622 623 /* QUESTION - should we attempt to print the raw header itself? 624 assuming of course there is wnough data present to do so... */ 625 626 return 0; 627 } 628 629 static int 630 print_sflow_ethernet_frame(netdissect_options *ndo, 631 const u_char *pointer, u_int len) 632 { 633 const struct sflow_ethernet_frame_t *sflow_ethernet_frame; 634 635 if (len < sizeof(struct sflow_ethernet_frame_t)) 636 return 1; 637 638 sflow_ethernet_frame = (const struct sflow_ethernet_frame_t *)pointer; 639 640 ND_PRINT((ndo, "\n\t frame len %u, type %u", 641 EXTRACT_32BITS(sflow_ethernet_frame->length), 642 EXTRACT_32BITS(sflow_ethernet_frame->type))); 643 644 return 0; 645 } 646 647 static int 648 print_sflow_extended_switch_data(netdissect_options *ndo, 649 const u_char *pointer, u_int len) 650 { 651 const struct sflow_extended_switch_data_t *sflow_extended_sw_data; 652 653 if (len < sizeof(struct sflow_extended_switch_data_t)) 654 return 1; 655 656 sflow_extended_sw_data = (const struct sflow_extended_switch_data_t *)pointer; 657 ND_PRINT((ndo, "\n\t src vlan %u, src pri %u, dst vlan %u, dst pri %u", 658 EXTRACT_32BITS(sflow_extended_sw_data->src_vlan), 659 EXTRACT_32BITS(sflow_extended_sw_data->src_pri), 660 EXTRACT_32BITS(sflow_extended_sw_data->dst_vlan), 661 EXTRACT_32BITS(sflow_extended_sw_data->dst_pri))); 662 663 return 0; 664 } 665 666 static int 667 sflow_print_flow_records(netdissect_options *ndo, 668 const u_char *pointer, u_int len, u_int records) 669 { 670 u_int nrecords; 671 const u_char *tptr; 672 u_int tlen; 673 u_int flow_type; 674 u_int enterprise; 675 u_int flow_len; 676 const struct sflow_flow_record_t *sflow_flow_record; 677 678 nrecords = records; 679 tptr = pointer; 680 tlen = len; 681 682 while (nrecords > 0) { 683 /* do we have the "header?" */ 684 if (tlen < sizeof(struct sflow_flow_record_t)) 685 return 1; 686 687 sflow_flow_record = (const struct sflow_flow_record_t *)tptr; 688 689 /* so, the funky encoding means we cannot blythly mask-off 690 bits, we must also check the enterprise. */ 691 692 enterprise = EXTRACT_32BITS(sflow_flow_record->format); 693 flow_type = enterprise & 0x0FFF; 694 enterprise = enterprise >> 12; 695 flow_len = EXTRACT_32BITS(sflow_flow_record->length); 696 ND_PRINT((ndo, "\n\t enterprise %u %s (%u) length %u", 697 enterprise, 698 (enterprise == 0) ? tok2str(sflow_flow_type_values,"Unknown",flow_type) : "Unknown", 699 flow_type, 700 flow_len)); 701 702 tptr += sizeof(struct sflow_flow_record_t); 703 tlen -= sizeof(struct sflow_flow_record_t); 704 705 if (tlen < flow_len) 706 return 1; 707 708 if (enterprise == 0) { 709 switch (flow_type) { 710 case SFLOW_FLOW_RAW_PACKET: 711 if (print_sflow_raw_packet(ndo, tptr, tlen)) 712 return 1; 713 break; 714 case SFLOW_FLOW_EXTENDED_SWITCH_DATA: 715 if (print_sflow_extended_switch_data(ndo, tptr, tlen)) 716 return 1; 717 break; 718 case SFLOW_FLOW_ETHERNET_FRAME: 719 if (print_sflow_ethernet_frame(ndo, tptr, tlen)) 720 return 1; 721 break; 722 /* FIXME these need a decoder */ 723 case SFLOW_FLOW_IPV4_DATA: 724 case SFLOW_FLOW_IPV6_DATA: 725 case SFLOW_FLOW_EXTENDED_ROUTER_DATA: 726 case SFLOW_FLOW_EXTENDED_GATEWAY_DATA: 727 case SFLOW_FLOW_EXTENDED_USER_DATA: 728 case SFLOW_FLOW_EXTENDED_URL_DATA: 729 case SFLOW_FLOW_EXTENDED_MPLS_DATA: 730 case SFLOW_FLOW_EXTENDED_NAT_DATA: 731 case SFLOW_FLOW_EXTENDED_MPLS_TUNNEL: 732 case SFLOW_FLOW_EXTENDED_MPLS_VC: 733 case SFLOW_FLOW_EXTENDED_MPLS_FEC: 734 case SFLOW_FLOW_EXTENDED_MPLS_LVP_FEC: 735 case SFLOW_FLOW_EXTENDED_VLAN_TUNNEL: 736 break; 737 default: 738 if (ndo->ndo_vflag <= 1) 739 print_unknown_data(ndo, tptr, "\n\t\t", flow_len); 740 break; 741 } 742 } 743 tptr += flow_len; 744 tlen -= flow_len; 745 nrecords--; 746 747 } 748 749 return 0; 750 } 751 752 static int 753 sflow_print_flow_sample(netdissect_options *ndo, 754 const u_char *pointer, u_int len) 755 { 756 const struct sflow_flow_sample_t *sflow_flow_sample; 757 u_int nrecords; 758 u_int typesource; 759 u_int type; 760 u_int index; 761 762 if (len < sizeof(struct sflow_flow_sample_t)) 763 return 1; 764 765 sflow_flow_sample = (struct sflow_flow_sample_t *)pointer; 766 767 typesource = EXTRACT_32BITS(sflow_flow_sample->typesource); 768 nrecords = EXTRACT_32BITS(sflow_flow_sample->records); 769 type = typesource >> 24; 770 index = typesource & 0x0FFF; 771 772 ND_PRINT((ndo, " seqnum %u, type %u, idx %u, rate %u, pool %u, drops %u, input %u output %u records %u", 773 EXTRACT_32BITS(sflow_flow_sample->seqnum), 774 type, 775 index, 776 EXTRACT_32BITS(sflow_flow_sample->rate), 777 EXTRACT_32BITS(sflow_flow_sample->pool), 778 EXTRACT_32BITS(sflow_flow_sample->drops), 779 EXTRACT_32BITS(sflow_flow_sample->in_interface), 780 EXTRACT_32BITS(sflow_flow_sample->out_interface), 781 nrecords)); 782 783 return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_flow_sample_t), 784 len - sizeof(struct sflow_flow_sample_t), 785 nrecords); 786 787 } 788 789 static int 790 sflow_print_expanded_flow_sample(netdissect_options *ndo, 791 const u_char *pointer, u_int len) 792 { 793 const struct sflow_expanded_flow_sample_t *sflow_expanded_flow_sample; 794 u_int nrecords; 795 796 if (len < sizeof(struct sflow_expanded_flow_sample_t)) 797 return 1; 798 799 sflow_expanded_flow_sample = (const struct sflow_expanded_flow_sample_t *)pointer; 800 801 nrecords = EXTRACT_32BITS(sflow_expanded_flow_sample->records); 802 803 ND_PRINT((ndo, " seqnum %u, type %u, idx %u, rate %u, pool %u, drops %u, records %u", 804 EXTRACT_32BITS(sflow_expanded_flow_sample->seqnum), 805 EXTRACT_32BITS(sflow_expanded_flow_sample->type), 806 EXTRACT_32BITS(sflow_expanded_flow_sample->index), 807 EXTRACT_32BITS(sflow_expanded_flow_sample->rate), 808 EXTRACT_32BITS(sflow_expanded_flow_sample->pool), 809 EXTRACT_32BITS(sflow_expanded_flow_sample->drops), 810 EXTRACT_32BITS(sflow_expanded_flow_sample->records))); 811 812 return sflow_print_flow_records(ndo, pointer + sizeof(struct sflow_expanded_flow_sample_t), 813 len - sizeof(struct sflow_expanded_flow_sample_t), 814 nrecords); 815 816 } 817 818 void 819 sflow_print(netdissect_options *ndo, 820 const u_char *pptr, u_int len) 821 { 822 const struct sflow_datagram_t *sflow_datagram; 823 const struct sflow_sample_header *sflow_sample; 824 825 const u_char *tptr; 826 u_int tlen; 827 uint32_t sflow_sample_type, sflow_sample_len; 828 uint32_t nsamples; 829 830 831 tptr = pptr; 832 tlen = len; 833 sflow_datagram = (const struct sflow_datagram_t *)pptr; 834 ND_TCHECK(*sflow_datagram); 835 836 /* 837 * Sanity checking of the header. 838 */ 839 if (EXTRACT_32BITS(sflow_datagram->version) != 5) { 840 ND_PRINT((ndo, "sFlow version %u packet not supported", 841 EXTRACT_32BITS(sflow_datagram->version))); 842 return; 843 } 844 845 if (ndo->ndo_vflag < 1) { 846 ND_PRINT((ndo, "sFlowv%u, %s agent %s, agent-id %u, length %u", 847 EXTRACT_32BITS(sflow_datagram->version), 848 EXTRACT_32BITS(sflow_datagram->ip_version) == 1 ? "IPv4" : "IPv6", 849 ipaddr_string(ndo, sflow_datagram->agent), 850 EXTRACT_32BITS(sflow_datagram->agent_id), 851 len)); 852 return; 853 } 854 855 /* ok they seem to want to know everything - lets fully decode it */ 856 nsamples=EXTRACT_32BITS(sflow_datagram->samples); 857 ND_PRINT((ndo, "sFlowv%u, %s agent %s, agent-id %u, seqnum %u, uptime %u, samples %u, length %u", 858 EXTRACT_32BITS(sflow_datagram->version), 859 EXTRACT_32BITS(sflow_datagram->ip_version) == 1 ? "IPv4" : "IPv6", 860 ipaddr_string(ndo, sflow_datagram->agent), 861 EXTRACT_32BITS(sflow_datagram->agent_id), 862 EXTRACT_32BITS(sflow_datagram->seqnum), 863 EXTRACT_32BITS(sflow_datagram->uptime), 864 nsamples, 865 len)); 866 867 /* skip Common header */ 868 tptr += sizeof(const struct sflow_datagram_t); 869 tlen -= sizeof(const struct sflow_datagram_t); 870 871 while (nsamples > 0 && tlen > 0) { 872 sflow_sample = (const struct sflow_sample_header *)tptr; 873 ND_TCHECK(*sflow_sample); 874 875 sflow_sample_type = (EXTRACT_32BITS(sflow_sample->format)&0x0FFF); 876 sflow_sample_len = EXTRACT_32BITS(sflow_sample->len); 877 878 if (tlen < sizeof(struct sflow_sample_header)) 879 goto trunc; 880 881 tptr += sizeof(struct sflow_sample_header); 882 tlen -= sizeof(struct sflow_sample_header); 883 884 ND_PRINT((ndo, "\n\t%s (%u), length %u,", 885 tok2str(sflow_format_values, "Unknown", sflow_sample_type), 886 sflow_sample_type, 887 sflow_sample_len)); 888 889 /* basic sanity check */ 890 if (sflow_sample_type == 0 || sflow_sample_len ==0) { 891 return; 892 } 893 894 if (tlen < sflow_sample_len) 895 goto trunc; 896 897 /* did we capture enough for fully decoding the sample ? */ 898 ND_TCHECK2(*tptr, sflow_sample_len); 899 900 switch(sflow_sample_type) { 901 case SFLOW_FLOW_SAMPLE: 902 if (sflow_print_flow_sample(ndo, tptr, tlen)) 903 goto trunc; 904 break; 905 906 case SFLOW_COUNTER_SAMPLE: 907 if (sflow_print_counter_sample(ndo, tptr,tlen)) 908 goto trunc; 909 break; 910 911 case SFLOW_EXPANDED_FLOW_SAMPLE: 912 if (sflow_print_expanded_flow_sample(ndo, tptr, tlen)) 913 goto trunc; 914 break; 915 916 case SFLOW_EXPANDED_COUNTER_SAMPLE: 917 if (sflow_print_expanded_counter_sample(ndo, tptr,tlen)) 918 goto trunc; 919 break; 920 921 default: 922 if (ndo->ndo_vflag <= 1) 923 print_unknown_data(ndo, tptr, "\n\t ", sflow_sample_len); 924 break; 925 } 926 tptr += sflow_sample_len; 927 tlen -= sflow_sample_len; 928 nsamples--; 929 } 930 return; 931 932 trunc: 933 ND_PRINT((ndo, "[|SFLOW]")); 934 } 935 936 /* 937 * Local Variables: 938 * c-style: whitesmith 939 * c-basic-offset: 4 940 * End: 941 */ 942
