contrib/tcpdump/print-cnfp.c

   1 /*      $OpenBSD: print-cnfp.c,v 1.2 1998/06/25 20:26:59 mickey Exp $   */
   2
   3 /*
   4  * Copyright (c) 1998 Michael Shalayeff
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Michael Shalayeff.
  18  * 4. The name of the author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /* \summary: Cisco NetFlow protocol printer */
  34
  35 /*
  36  * Cisco NetFlow protocol
  37  *
  38  * See
  39  *
  40  *    https://www.cisco.com/c/en/us/td/docs/net_mgmt/netflow_collection_engine/3-6/user/guide/format.html#wp1005892
  41  */
  42
  43 #ifdef HAVE_CONFIG_H
  44 #include <config.h>
  45 #endif
  46
  47 #include "netdissect-stdinc.h"
  48
  49 #include <stdio.h>
  50
  51 #include "netdissect.h"
  52 #include "addrtoname.h"
  53 #include "extract.h"
  54
  55 #include "tcp.h"
  56 #include "ipproto.h"
  57
  58 struct nfhdr_v1 {
  59         nd_uint16_t     version;        /* version number */
  60         nd_uint16_t     count;          /* # of records */
  61         nd_uint32_t     msys_uptime;
  62         nd_uint32_t     utc_sec;
  63         nd_uint32_t     utc_nsec;
  64 };
  65
  66 struct nfrec_v1 {
  67         nd_ipv4         src_ina;
  68         nd_ipv4         dst_ina;
  69         nd_ipv4         nhop_ina;
  70         nd_uint16_t     input;          /* SNMP index of input interface */
  71         nd_uint16_t     output;         /* SNMP index of output interface */
  72         nd_uint32_t     packets;        /* packets in the flow */
  73         nd_uint32_t     octets;         /* layer 3 octets in the packets of the flow */
  74         nd_uint32_t     start_time;     /* sys_uptime value at start of flow */
  75         nd_uint32_t     last_time;      /* sys_uptime value when last packet of flow was received */
  76         nd_uint16_t     srcport;        /* TCP/UDP source port or equivalent */
  77         nd_uint16_t     dstport;        /* TCP/UDP source port or equivalent */
  78         nd_byte         pad1[2];        /* pad */
  79         nd_uint8_t      proto;          /* IP protocol type */
  80         nd_uint8_t      tos;            /* IP type of service */
  81         nd_uint8_t      tcp_flags;      /* cumulative OR of TCP flags */
  82         nd_byte         pad[3];         /* padding */
  83         nd_uint32_t     reserved;       /* unused */
  84 };
  85
  86 struct nfhdr_v5 {
  87         nd_uint16_t     version;        /* version number */
  88         nd_uint16_t     count;          /* # of records */
  89         nd_uint32_t     msys_uptime;
  90         nd_uint32_t     utc_sec;
  91         nd_uint32_t     utc_nsec;
  92         nd_uint32_t     sequence;       /* flow sequence number */
  93         nd_uint8_t      engine_type;    /* type of flow-switching engine */
  94         nd_uint8_t      engine_id;      /* slot number of the flow-switching engine */
  95         nd_uint16_t     sampling_interval; /* sampling mode and interval */
  96 };
  97
  98 struct nfrec_v5 {
  99         nd_ipv4         src_ina;
 100         nd_ipv4         dst_ina;
 101         nd_ipv4         nhop_ina;
 102         nd_uint16_t     input;          /* SNMP index of input interface */
 103         nd_uint16_t     output;         /* SNMP index of output interface */
 104         nd_uint32_t     packets;        /* packets in the flow */
 105         nd_uint32_t     octets;         /* layer 3 octets in the packets of the flow */
 106         nd_uint32_t     start_time;     /* sys_uptime value at start of flow */
 107         nd_uint32_t     last_time;      /* sys_uptime value when last packet of flow was received */
 108         nd_uint16_t     srcport;        /* TCP/UDP source port or equivalent */
 109         nd_uint16_t     dstport;        /* TCP/UDP source port or equivalent */
 110         nd_byte         pad1;           /* pad */
 111         nd_uint8_t      tcp_flags;      /* cumulative OR of TCP flags */
 112         nd_uint8_t      proto;          /* IP protocol type */
 113         nd_uint8_t      tos;            /* IP type of service */
 114         nd_uint16_t     src_as;         /* AS number of the source */
 115         nd_uint16_t     dst_as;         /* AS number of the destination */
 116         nd_uint8_t      src_mask;       /* source address mask bits */
 117         nd_uint8_t      dst_mask;       /* destination address prefix mask bits */
 118         nd_byte         pad2[2];
 119         nd_ipv4         peer_nexthop;   /* v6: IP address of the nexthop within the peer (FIB)*/
 120 };
 121
 122 struct nfhdr_v6 {
 123         nd_uint16_t     version;        /* version number */
 124         nd_uint16_t     count;          /* # of records */
 125         nd_uint32_t     msys_uptime;
 126         nd_uint32_t     utc_sec;
 127         nd_uint32_t     utc_nsec;
 128         nd_uint32_t     sequence;       /* v5 flow sequence number */
 129         nd_uint32_t     reserved;       /* v5 only */
 130 };
 131
 132 struct nfrec_v6 {
 133         nd_ipv4         src_ina;
 134         nd_ipv4         dst_ina;
 135         nd_ipv4         nhop_ina;
 136         nd_uint16_t     input;          /* SNMP index of input interface */
 137         nd_uint16_t     output;         /* SNMP index of output interface */
 138         nd_uint32_t     packets;        /* packets in the flow */
 139         nd_uint32_t     octets;         /* layer 3 octets in the packets of the flow */
 140         nd_uint32_t     start_time;     /* sys_uptime value at start of flow */
 141         nd_uint32_t     last_time;      /* sys_uptime value when last packet of flow was received */
 142         nd_uint16_t     srcport;        /* TCP/UDP source port or equivalent */
 143         nd_uint16_t     dstport;        /* TCP/UDP source port or equivalent */
 144         nd_byte         pad1;           /* pad */
 145         nd_uint8_t      tcp_flags;      /* cumulative OR of TCP flags */
 146         nd_uint8_t      proto;          /* IP protocol type */
 147         nd_uint8_t      tos;            /* IP type of service */
 148         nd_uint16_t     src_as;         /* AS number of the source */
 149         nd_uint16_t     dst_as;         /* AS number of the destination */
 150         nd_uint8_t      src_mask;       /* source address mask bits */
 151         nd_uint8_t      dst_mask;       /* destination address prefix mask bits */
 152         nd_uint16_t     flags;
 153         nd_ipv4         peer_nexthop;   /* v6: IP address of the nexthop within the peer (FIB)*/
 154 };
 155
 156 static void
 157 cnfp_v1_print(netdissect_options *ndo, const u_char *cp)
 158 {
 159         const struct nfhdr_v1 *nh;
 160         const struct nfrec_v1 *nr;
 161         const char *p_name;
 162         uint8_t proto;
 163         u_int nrecs, ver;
 164 #if 0
 165         time_t t;
 166 #endif
 167
 168         nh = (const struct nfhdr_v1 *)cp;
 169         ND_TCHECK_SIZE(nh);
 170
 171         ver = GET_BE_U_2(nh->version);
 172         nrecs = GET_BE_U_4(nh->count);
 173 #if 0
 174         /*
 175          * This is seconds since the UN*X epoch, and is followed by
 176          * nanoseconds.  XXX - format it, rather than just dumping the
 177          * raw seconds-since-the-Epoch.
 178          */
 179         t = GET_BE_U_4(nh->utc_sec);
 180 #endif
 181
 182         ND_PRINT("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 183                GET_BE_U_4(nh->msys_uptime)/1000,
 184                GET_BE_U_4(nh->msys_uptime)%1000,
 185                GET_BE_U_4(nh->utc_sec), GET_BE_U_4(nh->utc_nsec));
 186
 187         nr = (const struct nfrec_v1 *)&nh[1];
 188
 189         ND_PRINT("%2u recs", nrecs);
 190
 191         for (; nrecs != 0; nr++, nrecs--) {
 192                 char buf[20];
 193                 char asbuf[20];
 194
 195                 /*
 196                  * Make sure we have the entire record.
 197                  */
 198                 ND_TCHECK_SIZE(nr);
 199                 ND_PRINT("\n  started %u.%03u, last %u.%03u",
 200                        GET_BE_U_4(nr->start_time)/1000,
 201                        GET_BE_U_4(nr->start_time)%1000,
 202                        GET_BE_U_4(nr->last_time)/1000,
 203                        GET_BE_U_4(nr->last_time)%1000);
 204
 205                 asbuf[0] = buf[0] = '\0';
 206                 ND_PRINT("\n    %s%s%s:%u ",
 207                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->src_ina)),
 208                         buf, asbuf,
 209                         GET_BE_U_2(nr->srcport));
 210
 211                 ND_PRINT("> %s%s%s:%u ",
 212                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->dst_ina)),
 213                         buf, asbuf,
 214                         GET_BE_U_2(nr->dstport));
 215
 216                 ND_PRINT(">> %s\n    ",
 217                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->nhop_ina)));
 218
 219                 proto = GET_U_1(nr->proto);
 220                 if (!ndo->ndo_nflag && (p_name = netdb_protoname(proto)) != NULL)
 221                         ND_PRINT("%s ", p_name);
 222                 else
 223                         ND_PRINT("%u ", proto);
 224
 225                 /* tcp flags for tcp only */
 226                 if (proto == IPPROTO_TCP) {
 227                         u_int flags;
 228                         flags = GET_U_1(nr->tcp_flags);
 229                         ND_PRINT("%s%s%s%s%s%s%s",
 230                                 flags & TH_FIN  ? "F" : "",
 231                                 flags & TH_SYN  ? "S" : "",
 232                                 flags & TH_RST  ? "R" : "",
 233                                 flags & TH_PUSH ? "P" : "",
 234                                 flags & TH_ACK  ? "A" : "",
 235                                 flags & TH_URG  ? "U" : "",
 236                                 flags           ? " " : "");
 237                 }
 238
 239                 buf[0]='\0';
 240                 ND_PRINT("tos %u, %u (%u octets) %s",
 241                        GET_U_1(nr->tos),
 242                        GET_BE_U_4(nr->packets),
 243                        GET_BE_U_4(nr->octets), buf);
 244         }
 245         return;
 246
 247 trunc:
 248         nd_print_trunc(ndo);
 249 }
 250
 251 static void
 252 cnfp_v5_print(netdissect_options *ndo, const u_char *cp)
 253 {
 254         const struct nfhdr_v5 *nh;
 255         const struct nfrec_v5 *nr;
 256         const char *p_name;
 257         uint8_t proto;
 258         u_int nrecs, ver;
 259 #if 0
 260         time_t t;
 261 #endif
 262
 263         nh = (const struct nfhdr_v5 *)cp;
 264         ND_TCHECK_SIZE(nh);
 265
 266         ver = GET_BE_U_2(nh->version);
 267         nrecs = GET_BE_U_4(nh->count);
 268 #if 0
 269         /*
 270          * This is seconds since the UN*X epoch, and is followed by
 271          * nanoseconds.  XXX - format it, rather than just dumping the
 272          * raw seconds-since-the-Epoch.
 273          */
 274         t = GET_BE_U_4(nh->utc_sec);
 275 #endif
 276
 277         ND_PRINT("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 278                GET_BE_U_4(nh->msys_uptime)/1000,
 279                GET_BE_U_4(nh->msys_uptime)%1000,
 280                GET_BE_U_4(nh->utc_sec), GET_BE_U_4(nh->utc_nsec));
 281
 282         ND_PRINT("#%u, ", GET_BE_U_4(nh->sequence));
 283         nr = (const struct nfrec_v5 *)&nh[1];
 284
 285         ND_PRINT("%2u recs", nrecs);
 286
 287         for (; nrecs != 0; nr++, nrecs--) {
 288                 char buf[20];
 289                 char asbuf[20];
 290
 291                 /*
 292                  * Make sure we have the entire record.
 293                  */
 294                 ND_TCHECK_SIZE(nr);
 295                 ND_PRINT("\n  started %u.%03u, last %u.%03u",
 296                        GET_BE_U_4(nr->start_time)/1000,
 297                        GET_BE_U_4(nr->start_time)%1000,
 298                        GET_BE_U_4(nr->last_time)/1000,
 299                        GET_BE_U_4(nr->last_time)%1000);
 300
 301                 asbuf[0] = buf[0] = '\0';
 302                 snprintf(buf, sizeof(buf), "/%u", GET_U_1(nr->src_mask));
 303                 snprintf(asbuf, sizeof(asbuf), ":%u",
 304                         GET_BE_U_2(nr->src_as));
 305                 ND_PRINT("\n    %s%s%s:%u ",
 306                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->src_ina)),
 307                         buf, asbuf,
 308                         GET_BE_U_2(nr->srcport));
 309
 310                 snprintf(buf, sizeof(buf), "/%u", GET_U_1(nr->dst_mask));
 311                 snprintf(asbuf, sizeof(asbuf), ":%u",
 312                          GET_BE_U_2(nr->dst_as));
 313                 ND_PRINT("> %s%s%s:%u ",
 314                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->dst_ina)),
 315                         buf, asbuf,
 316                         GET_BE_U_2(nr->dstport));
 317
 318                 ND_PRINT(">> %s\n    ",
 319                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->nhop_ina)));
 320
 321                 proto = GET_U_1(nr->proto);
 322                 if (!ndo->ndo_nflag && (p_name = netdb_protoname(proto)) != NULL)
 323                         ND_PRINT("%s ", p_name);
 324                 else
 325                         ND_PRINT("%u ", proto);
 326
 327                 /* tcp flags for tcp only */
 328                 if (proto == IPPROTO_TCP) {
 329                         u_int flags;
 330                         flags = GET_U_1(nr->tcp_flags);
 331                         ND_PRINT("%s%s%s%s%s%s%s",
 332                                 flags & TH_FIN  ? "F" : "",
 333                                 flags & TH_SYN  ? "S" : "",
 334                                 flags & TH_RST  ? "R" : "",
 335                                 flags & TH_PUSH ? "P" : "",
 336                                 flags & TH_ACK  ? "A" : "",
 337                                 flags & TH_URG  ? "U" : "",
 338                                 flags           ? " " : "");
 339                 }
 340
 341                 buf[0]='\0';
 342                 ND_PRINT("tos %u, %u (%u octets) %s",
 343                        GET_U_1(nr->tos),
 344                        GET_BE_U_4(nr->packets),
 345                        GET_BE_U_4(nr->octets), buf);
 346         }
 347         return;
 348
 349 trunc:
 350         nd_print_trunc(ndo);
 351 }
 352
 353 static void
 354 cnfp_v6_print(netdissect_options *ndo, const u_char *cp)
 355 {
 356         const struct nfhdr_v6 *nh;
 357         const struct nfrec_v6 *nr;
 358         const char *p_name;
 359         uint8_t proto;
 360         u_int nrecs, ver;
 361 #if 0
 362         time_t t;
 363 #endif
 364
 365         nh = (const struct nfhdr_v6 *)cp;
 366         ND_TCHECK_SIZE(nh);
 367
 368         ver = GET_BE_U_2(nh->version);
 369         nrecs = GET_BE_U_4(nh->count);
 370 #if 0
 371         /*
 372          * This is seconds since the UN*X epoch, and is followed by
 373          * nanoseconds.  XXX - format it, rather than just dumping the
 374          * raw seconds-since-the-Epoch.
 375          */
 376         t = GET_BE_U_4(nh->utc_sec);
 377 #endif
 378
 379         ND_PRINT("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 380                GET_BE_U_4(nh->msys_uptime)/1000,
 381                GET_BE_U_4(nh->msys_uptime)%1000,
 382                GET_BE_U_4(nh->utc_sec), GET_BE_U_4(nh->utc_nsec));
 383
 384         ND_PRINT("#%u, ", GET_BE_U_4(nh->sequence));
 385         nr = (const struct nfrec_v6 *)&nh[1];
 386
 387         ND_PRINT("%2u recs", nrecs);
 388
 389         for (; nrecs != 0; nr++, nrecs--) {
 390                 char buf[20];
 391                 char asbuf[20];
 392
 393                 /*
 394                  * Make sure we have the entire record.
 395                  */
 396                 ND_TCHECK_SIZE(nr);
 397                 ND_PRINT("\n  started %u.%03u, last %u.%03u",
 398                        GET_BE_U_4(nr->start_time)/1000,
 399                        GET_BE_U_4(nr->start_time)%1000,
 400                        GET_BE_U_4(nr->last_time)/1000,
 401                        GET_BE_U_4(nr->last_time)%1000);
 402
 403                 asbuf[0] = buf[0] = '\0';
 404                 snprintf(buf, sizeof(buf), "/%u", GET_U_1(nr->src_mask));
 405                 snprintf(asbuf, sizeof(asbuf), ":%u",
 406                         GET_BE_U_2(nr->src_as));
 407                 ND_PRINT("\n    %s%s%s:%u ",
 408                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->src_ina)),
 409                         buf, asbuf,
 410                         GET_BE_U_2(nr->srcport));
 411
 412                 snprintf(buf, sizeof(buf), "/%u", GET_U_1(nr->dst_mask));
 413                 snprintf(asbuf, sizeof(asbuf), ":%u",
 414                          GET_BE_U_2(nr->dst_as));
 415                 ND_PRINT("> %s%s%s:%u ",
 416                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->dst_ina)),
 417                         buf, asbuf,
 418                         GET_BE_U_2(nr->dstport));
 419
 420                 ND_PRINT(">> %s\n    ",
 421                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->nhop_ina)));
 422
 423                 proto = GET_U_1(nr->proto);
 424                 if (!ndo->ndo_nflag && (p_name = netdb_protoname(proto)) != NULL)
 425                         ND_PRINT("%s ", p_name);
 426                 else
 427                         ND_PRINT("%u ", proto);
 428
 429                 /* tcp flags for tcp only */
 430                 if (proto == IPPROTO_TCP) {
 431                         u_int flags;
 432                         flags = GET_U_1(nr->tcp_flags);
 433                         ND_PRINT("%s%s%s%s%s%s%s",
 434                                 flags & TH_FIN  ? "F" : "",
 435                                 flags & TH_SYN  ? "S" : "",
 436                                 flags & TH_RST  ? "R" : "",
 437                                 flags & TH_PUSH ? "P" : "",
 438                                 flags & TH_ACK  ? "A" : "",
 439                                 flags & TH_URG  ? "U" : "",
 440                                 flags           ? " " : "");
 441                 }
 442
 443                 buf[0]='\0';
 444                 snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
 445                          (GET_BE_U_2(nr->flags) >> 8) & 0xff,
 446                          (GET_BE_U_2(nr->flags)) & 0xff);
 447                 ND_PRINT("tos %u, %u (%u octets) %s",
 448                        GET_U_1(nr->tos),
 449                        GET_BE_U_4(nr->packets),
 450                        GET_BE_U_4(nr->octets), buf);
 451         }
 452         return;
 453
 454 trunc:
 455         nd_print_trunc(ndo);
 456 }
 457
 458 void
 459 cnfp_print(netdissect_options *ndo, const u_char *cp)
 460 {
 461         int ver;
 462
 463         /*
 464          * First 2 bytes are the version number.
 465          */
 466         ndo->ndo_protocol = "cnfp";
 467         ver = GET_BE_U_2(cp);
 468         switch (ver) {
 469
 470         case 1:
 471                 cnfp_v1_print(ndo, cp);
 472                 break;
 473
 474         case 5:
 475                 cnfp_v5_print(ndo, cp);
 476                 break;
 477
 478         case 6:
 479                 cnfp_v6_print(ndo, cp);
 480                 break;
 481
 482         default:
 483                 ND_PRINT("NetFlow v%x", ver);
 484                 break;
 485         }
 486 }