The Tcpdump Group git mirrors - tcpdump/blob - 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 /*
  34  * Cisco NetFlow protocol
  35  *
  36  * See
  37  *
  38  *    http://www.cisco.com/c/en/us/td/docs/net_mgmt/netflow_collection_engine/3-6/user/guide/format.html#wp1005892
  39  */
  40
  41 #ifdef HAVE_CONFIG_H
  42 #include "config.h"
  43 #endif
  44
  45 #include <netdissect-stdinc.h>
  46
  47 #include <stdio.h>
  48 #include <string.h>
  49
  50 #include "netdissect.h"
  51 #include "addrtoname.h"
  52 #include "extract.h"
  53
  54 #include "tcp.h"
  55 #include "ipproto.h"
  56
  57 struct nfhdr_v1 {
  58         uint16_t        version;        /* version number */
  59         uint16_t        count;          /* # of records */
  60         uint32_t        msys_uptime;
  61         uint32_t        utc_sec;
  62         uint32_t        utc_nsec;
  63 };
  64
  65 struct nfrec_v1 {
  66         struct in_addr  src_ina;
  67         struct in_addr  dst_ina;
  68         struct in_addr  nhop_ina;
  69         uint16_t        input;          /* SNMP index of input interface */
  70         uint16_t        output;         /* SNMP index of output interface */
  71         uint32_t        packets;        /* packets in the flow */
  72         uint32_t        octets;         /* layer 3 octets in the packets of the flow */
  73         uint32_t        start_time;     /* sys_uptime value at start of flow */
  74         uint32_t        last_time;      /* sys_uptime value when last packet of flow was received */
  75         uint16_t        srcport;        /* TCP/UDP source port or equivalent */
  76         uint16_t        dstport;        /* TCP/UDP source port or equivalent */
  77         uint16_t        pad1;           /* pad */
  78         uint8_t         proto;          /* IP protocol type */
  79         uint8_t         tos;            /* IP type of service */
  80         uint8_t         tcp_flags;      /* cumulative OR of TCP flags */
  81         uint8_t         pad[3];         /* padding */
  82         uint32_t        reserved;       /* unused */
  83 };
  84
  85 struct nfhdr_v5 {
  86         uint16_t        version;        /* version number */
  87         uint16_t        count;          /* # of records */
  88         uint32_t        msys_uptime;
  89         uint32_t        utc_sec;
  90         uint32_t        utc_nsec;
  91         uint32_t        sequence;       /* flow sequence number */
  92         uint8_t         engine_type;    /* type of flow-switching engine */
  93         uint8_t         engine_id;      /* slot number of the flow-switching engine */
  94         uint16_t        sampling_interval; /* sampling mode and interval */
  95 };
  96
  97 struct nfrec_v5 {
  98         struct in_addr  src_ina;
  99         struct in_addr  dst_ina;
 100         struct in_addr  nhop_ina;
 101         uint16_t        input;          /* SNMP index of input interface */
 102         uint16_t        output;         /* SNMP index of output interface */
 103         uint32_t        packets;        /* packets in the flow */
 104         uint32_t        octets;         /* layer 3 octets in the packets of the flow */
 105         uint32_t        start_time;     /* sys_uptime value at start of flow */
 106         uint32_t        last_time;      /* sys_uptime value when last packet of flow was received */
 107         uint16_t        srcport;        /* TCP/UDP source port or equivalent */
 108         uint16_t        dstport;        /* TCP/UDP source port or equivalent */
 109         uint8_t         pad1;           /* pad */
 110         uint8_t         tcp_flags;      /* cumulative OR of TCP flags */
 111         uint8_t         proto;          /* IP protocol type */
 112         uint8_t         tos;            /* IP type of service */
 113         uint16_t        src_as;         /* AS number of the source */
 114         uint16_t        dst_as;         /* AS number of the destination */
 115         uint8_t         src_mask;       /* source address mask bits */
 116         uint8_t         dst_mask;       /* destination address prefix mask bits */
 117         uint16_t        pad2;
 118         struct in_addr  peer_nexthop;   /* v6: IP address of the nexthop within the peer (FIB)*/
 119 };
 120
 121 struct nfhdr_v6 {
 122         uint16_t        version;        /* version number */
 123         uint16_t        count;          /* # of records */
 124         uint32_t        msys_uptime;
 125         uint32_t        utc_sec;
 126         uint32_t        utc_nsec;
 127         uint32_t        sequence;       /* v5 flow sequence number */
 128         uint32_t        reserved;       /* v5 only */
 129 };
 130
 131 struct nfrec_v6 {
 132         struct in_addr  src_ina;
 133         struct in_addr  dst_ina;
 134         struct in_addr  nhop_ina;
 135         uint16_t        input;          /* SNMP index of input interface */
 136         uint16_t        output;         /* SNMP index of output interface */
 137         uint32_t        packets;        /* packets in the flow */
 138         uint32_t        octets;         /* layer 3 octets in the packets of the flow */
 139         uint32_t        start_time;     /* sys_uptime value at start of flow */
 140         uint32_t        last_time;      /* sys_uptime value when last packet of flow was received */
 141         uint16_t        srcport;        /* TCP/UDP source port or equivalent */
 142         uint16_t        dstport;        /* TCP/UDP source port or equivalent */
 143         uint8_t         pad1;           /* pad */
 144         uint8_t         tcp_flags;      /* cumulative OR of TCP flags */
 145         uint8_t         proto;          /* IP protocol type */
 146         uint8_t         tos;            /* IP type of service */
 147         uint16_t        src_as;         /* AS number of the source */
 148         uint16_t        dst_as;         /* AS number of the destination */
 149         uint8_t         src_mask;       /* source address mask bits */
 150         uint8_t         dst_mask;       /* destination address prefix mask bits */
 151         uint16_t        flags;
 152         struct in_addr  peer_nexthop;   /* v6: IP address of the nexthop within the peer (FIB)*/
 153 };
 154
 155 static void
 156 cnfp_v1_print(netdissect_options *ndo, const u_char *cp)
 157 {
 158         register const struct nfhdr_v1 *nh;
 159         register const struct nfrec_v1 *nr;
 160         struct protoent *pent;
 161         int nrecs, ver;
 162 #if 0
 163         time_t t;
 164 #endif
 165
 166         nh = (const struct nfhdr_v1 *)cp;
 167         ND_TCHECK(*nh);
 168
 169         ver = EXTRACT_16BITS(&nh->version);
 170         nrecs = EXTRACT_32BITS(&nh->count);
 171 #if 0
 172         /*
 173          * This is seconds since the UN*X epoch, and is followed by
 174          * nanoseconds.  XXX - format it, rather than just dumping the
 175          * raw seconds-since-the-Epoch.
 176          */
 177         t = EXTRACT_32BITS(&nh->utc_sec);
 178 #endif
 179
 180         ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 181                EXTRACT_32BITS(&nh->msys_uptime)/1000,
 182                EXTRACT_32BITS(&nh->msys_uptime)%1000,
 183                EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
 184
 185         nr = (const struct nfrec_v1 *)&nh[1];
 186
 187         ND_PRINT((ndo, "%2u recs", nrecs));
 188
 189         for (; nrecs != 0; nr++, nrecs--) {
 190                 char buf[20];
 191                 char asbuf[20];
 192
 193                 /*
 194                  * Make sure we have the entire record.
 195                  */
 196                 ND_TCHECK(*nr);
 197                 ND_PRINT((ndo, "\n  started %u.%03u, last %u.%03u",
 198                        EXTRACT_32BITS(&nr->start_time)/1000,
 199                        EXTRACT_32BITS(&nr->start_time)%1000,
 200                        EXTRACT_32BITS(&nr->last_time)/1000,
 201                        EXTRACT_32BITS(&nr->last_time)%1000));
 202
 203                 asbuf[0] = buf[0] = '\0';
 204                 ND_PRINT((ndo, "\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
 205                         EXTRACT_16BITS(&nr->srcport)));
 206
 207                 ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
 208                         EXTRACT_16BITS(&nr->dstport)));
 209
 210                 ND_PRINT((ndo, ">> %s\n    ", intoa(nr->nhop_ina.s_addr)));
 211
 212                 pent = getprotobynumber(nr->proto);
 213                 if (!pent || ndo->ndo_nflag)
 214                         ND_PRINT((ndo, "%u ", nr->proto));
 215                 else
 216                         ND_PRINT((ndo, "%s ", pent->p_name));
 217
 218                 /* tcp flags for tcp only */
 219                 if (pent && pent->p_proto == IPPROTO_TCP) {
 220                         int flags;
 221                         flags = nr->tcp_flags;
 222                         ND_PRINT((ndo, "%s%s%s%s%s%s%s",
 223                                 flags & TH_FIN  ? "F" : "",
 224                                 flags & TH_SYN  ? "S" : "",
 225                                 flags & TH_RST  ? "R" : "",
 226                                 flags & TH_PUSH ? "P" : "",
 227                                 flags & TH_ACK  ? "A" : "",
 228                                 flags & TH_URG  ? "U" : "",
 229                                 flags           ? " " : ""));
 230                 }
 231
 232                 buf[0]='\0';
 233                 ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
 234                        nr->tos,
 235                        EXTRACT_32BITS(&nr->packets),
 236                        EXTRACT_32BITS(&nr->octets), buf));
 237         }
 238         return;
 239
 240 trunc:
 241         ND_PRINT((ndo, "[|cnfp]"));
 242         return;
 243 }
 244
 245 static void
 246 cnfp_v5_print(netdissect_options *ndo, const u_char *cp)
 247 {
 248         register const struct nfhdr_v5 *nh;
 249         register const struct nfrec_v5 *nr;
 250         struct protoent *pent;
 251         int nrecs, ver;
 252 #if 0
 253         time_t t;
 254 #endif
 255
 256         nh = (const struct nfhdr_v5 *)cp;
 257         ND_TCHECK(*nh);
 258
 259         ver = EXTRACT_16BITS(&nh->version);
 260         nrecs = EXTRACT_32BITS(&nh->count);
 261 #if 0
 262         /*
 263          * This is seconds since the UN*X epoch, and is followed by
 264          * nanoseconds.  XXX - format it, rather than just dumping the
 265          * raw seconds-since-the-Epoch.
 266          */
 267         t = EXTRACT_32BITS(&nh->utc_sec);
 268 #endif
 269
 270         ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 271                EXTRACT_32BITS(&nh->msys_uptime)/1000,
 272                EXTRACT_32BITS(&nh->msys_uptime)%1000,
 273                EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
 274
 275         ND_PRINT((ndo, "#%u, ", EXTRACT_32BITS(&nh->sequence)));
 276         nr = (const struct nfrec_v5 *)&nh[1];
 277
 278         ND_PRINT((ndo, "%2u recs", nrecs));
 279
 280         for (; nrecs != 0; nr++, nrecs--) {
 281                 char buf[20];
 282                 char asbuf[20];
 283
 284                 /*
 285                  * Make sure we have the entire record.
 286                  */
 287                 ND_TCHECK(*nr);
 288                 ND_PRINT((ndo, "\n  started %u.%03u, last %u.%03u",
 289                        EXTRACT_32BITS(&nr->start_time)/1000,
 290                        EXTRACT_32BITS(&nr->start_time)%1000,
 291                        EXTRACT_32BITS(&nr->last_time)/1000,
 292                        EXTRACT_32BITS(&nr->last_time)%1000));
 293
 294                 asbuf[0] = buf[0] = '\0';
 295                 snprintf(buf, sizeof(buf), "/%u", nr->src_mask);
 296                 snprintf(asbuf, sizeof(asbuf), ":%u",
 297                         EXTRACT_16BITS(&nr->src_as));
 298                 ND_PRINT((ndo, "\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
 299                         EXTRACT_16BITS(&nr->srcport)));
 300
 301                 snprintf(buf, sizeof(buf), "/%d", nr->dst_mask);
 302                 snprintf(asbuf, sizeof(asbuf), ":%u",
 303                          EXTRACT_16BITS(&nr->dst_as));
 304                 ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
 305                         EXTRACT_16BITS(&nr->dstport)));
 306
 307                 ND_PRINT((ndo, ">> %s\n    ", intoa(nr->nhop_ina.s_addr)));
 308
 309                 pent = getprotobynumber(nr->proto);
 310                 if (!pent || ndo->ndo_nflag)
 311                         ND_PRINT((ndo, "%u ", nr->proto));
 312                 else
 313                         ND_PRINT((ndo, "%s ", pent->p_name));
 314
 315                 /* tcp flags for tcp only */
 316                 if (pent && pent->p_proto == IPPROTO_TCP) {
 317                         int flags;
 318                         flags = nr->tcp_flags;
 319                         ND_PRINT((ndo, "%s%s%s%s%s%s%s",
 320                                 flags & TH_FIN  ? "F" : "",
 321                                 flags & TH_SYN  ? "S" : "",
 322                                 flags & TH_RST  ? "R" : "",
 323                                 flags & TH_PUSH ? "P" : "",
 324                                 flags & TH_ACK  ? "A" : "",
 325                                 flags & TH_URG  ? "U" : "",
 326                                 flags           ? " " : ""));
 327                 }
 328
 329                 buf[0]='\0';
 330                 ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
 331                        nr->tos,
 332                        EXTRACT_32BITS(&nr->packets),
 333                        EXTRACT_32BITS(&nr->octets), buf));
 334         }
 335         return;
 336
 337 trunc:
 338         ND_PRINT((ndo, "[|cnfp]"));
 339         return;
 340 }
 341
 342 static void
 343 cnfp_v6_print(netdissect_options *ndo, const u_char *cp)
 344 {
 345         register const struct nfhdr_v6 *nh;
 346         register const struct nfrec_v6 *nr;
 347         struct protoent *pent;
 348         int nrecs, ver;
 349 #if 0
 350         time_t t;
 351 #endif
 352
 353         nh = (const struct nfhdr_v6 *)cp;
 354         ND_TCHECK(*nh);
 355
 356         ver = EXTRACT_16BITS(&nh->version);
 357         nrecs = EXTRACT_32BITS(&nh->count);
 358 #if 0
 359         /*
 360          * This is seconds since the UN*X epoch, and is followed by
 361          * nanoseconds.  XXX - format it, rather than just dumping the
 362          * raw seconds-since-the-Epoch.
 363          */
 364         t = EXTRACT_32BITS(&nh->utc_sec);
 365 #endif
 366
 367         ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 368                EXTRACT_32BITS(&nh->msys_uptime)/1000,
 369                EXTRACT_32BITS(&nh->msys_uptime)%1000,
 370                EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
 371
 372         ND_PRINT((ndo, "#%u, ", EXTRACT_32BITS(&nh->sequence)));
 373         nr = (const struct nfrec_v6 *)&nh[1];
 374
 375         ND_PRINT((ndo, "%2u recs", nrecs));
 376
 377         for (; nrecs != 0; nr++, nrecs--) {
 378                 char buf[20];
 379                 char asbuf[20];
 380
 381                 /*
 382                  * Make sure we have the entire record.
 383                  */
 384                 ND_TCHECK(*nr);
 385                 ND_PRINT((ndo, "\n  started %u.%03u, last %u.%03u",
 386                        EXTRACT_32BITS(&nr->start_time)/1000,
 387                        EXTRACT_32BITS(&nr->start_time)%1000,
 388                        EXTRACT_32BITS(&nr->last_time)/1000,
 389                        EXTRACT_32BITS(&nr->last_time)%1000));
 390
 391                 asbuf[0] = buf[0] = '\0';
 392                 snprintf(buf, sizeof(buf), "/%u", nr->src_mask);
 393                 snprintf(asbuf, sizeof(asbuf), ":%u",
 394                         EXTRACT_16BITS(&nr->src_as));
 395                 ND_PRINT((ndo, "\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
 396                         EXTRACT_16BITS(&nr->srcport)));
 397
 398                 snprintf(buf, sizeof(buf), "/%d", nr->dst_mask);
 399                 snprintf(asbuf, sizeof(asbuf), ":%u",
 400                          EXTRACT_16BITS(&nr->dst_as));
 401                 ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
 402                         EXTRACT_16BITS(&nr->dstport)));
 403
 404                 ND_PRINT((ndo, ">> %s\n    ", intoa(nr->nhop_ina.s_addr)));
 405
 406                 pent = getprotobynumber(nr->proto);
 407                 if (!pent || ndo->ndo_nflag)
 408                         ND_PRINT((ndo, "%u ", nr->proto));
 409                 else
 410                         ND_PRINT((ndo, "%s ", pent->p_name));
 411
 412                 /* tcp flags for tcp only */
 413                 if (pent && pent->p_proto == IPPROTO_TCP) {
 414                         int flags;
 415                         flags = nr->tcp_flags;
 416                         ND_PRINT((ndo, "%s%s%s%s%s%s%s",
 417                                 flags & TH_FIN  ? "F" : "",
 418                                 flags & TH_SYN  ? "S" : "",
 419                                 flags & TH_RST  ? "R" : "",
 420                                 flags & TH_PUSH ? "P" : "",
 421                                 flags & TH_ACK  ? "A" : "",
 422                                 flags & TH_URG  ? "U" : "",
 423                                 flags           ? " " : ""));
 424                 }
 425
 426                 buf[0]='\0';
 427                 snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
 428                          (EXTRACT_16BITS(&nr->flags) >> 8) & 0xff,
 429                          (EXTRACT_16BITS(&nr->flags)) & 0xff);
 430                 ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
 431                        nr->tos,
 432                        EXTRACT_32BITS(&nr->packets),
 433                        EXTRACT_32BITS(&nr->octets), buf));
 434         }
 435         return;
 436
 437 trunc:
 438         ND_PRINT((ndo, "[|cnfp]"));
 439         return;
 440 }
 441
 442 void
 443 cnfp_print(netdissect_options *ndo, const u_char *cp)
 444 {
 445         int ver;
 446
 447         /*
 448          * First 2 bytes are the version number.
 449          */
 450         ND_TCHECK2(*cp, 2);
 451         ver = EXTRACT_16BITS(cp);
 452         switch (ver) {
 453
 454         case 1:
 455                 cnfp_v1_print(ndo, cp);
 456                 break;
 457
 458         case 5:
 459                 cnfp_v5_print(ndo, cp);
 460                 break;
 461
 462         case 6:
 463                 cnfp_v6_print(ndo, cp);
 464                 break;
 465
 466         default:
 467                 ND_PRINT((ndo, "NetFlow v%x", ver));
 468                 break;
 469         }
 470         return;
 471
 472 trunc:
 473         ND_PRINT((ndo, "[|cnfp]"));
 474         return;
 475 }