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 /* \summary: Cisco NetFlow protocol printer */
  34
  35 /*
  36  * Cisco NetFlow protocol
  37  *
  38  * See
  39  *
  40  *    http://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 #include <string.h>
  51
  52 #include "netdissect.h"
  53 #include "addrtoname.h"
  54 #include "extract.h"
  55
  56 #include "tcp.h"
  57 #include "ipproto.h"
  58
  59 struct nfhdr_v1 {
  60         uint16_t        version;        /* version number */
  61         uint16_t        count;          /* # of records */
  62         uint32_t        msys_uptime;
  63         uint32_t        utc_sec;
  64         uint32_t        utc_nsec;
  65 };
  66
  67 struct nfrec_v1 {
  68         struct in_addr  src_ina;
  69         struct in_addr  dst_ina;
  70         struct in_addr  nhop_ina;
  71         uint16_t        input;          /* SNMP index of input interface */
  72         uint16_t        output;         /* SNMP index of output interface */
  73         uint32_t        packets;        /* packets in the flow */
  74         uint32_t        octets;         /* layer 3 octets in the packets of the flow */
  75         uint32_t        start_time;     /* sys_uptime value at start of flow */
  76         uint32_t        last_time;      /* sys_uptime value when last packet of flow was received */
  77         uint16_t        srcport;        /* TCP/UDP source port or equivalent */
  78         uint16_t        dstport;        /* TCP/UDP source port or equivalent */
  79         uint16_t        pad1;           /* pad */
  80         uint8_t         proto;          /* IP protocol type */
  81         uint8_t         tos;            /* IP type of service */
  82         uint8_t         tcp_flags;      /* cumulative OR of TCP flags */
  83         uint8_t         pad[3];         /* padding */
  84         uint32_t        reserved;       /* unused */
  85 };
  86
  87 struct nfhdr_v5 {
  88         uint16_t        version;        /* version number */
  89         uint16_t        count;          /* # of records */
  90         uint32_t        msys_uptime;
  91         uint32_t        utc_sec;
  92         uint32_t        utc_nsec;
  93         uint32_t        sequence;       /* flow sequence number */
  94         uint8_t         engine_type;    /* type of flow-switching engine */
  95         uint8_t         engine_id;      /* slot number of the flow-switching engine */
  96         uint16_t        sampling_interval; /* sampling mode and interval */
  97 };
  98
  99 struct nfrec_v5 {
 100         struct in_addr  src_ina;
 101         struct in_addr  dst_ina;
 102         struct in_addr  nhop_ina;
 103         uint16_t        input;          /* SNMP index of input interface */
 104         uint16_t        output;         /* SNMP index of output interface */
 105         uint32_t        packets;        /* packets in the flow */
 106         uint32_t        octets;         /* layer 3 octets in the packets of the flow */
 107         uint32_t        start_time;     /* sys_uptime value at start of flow */
 108         uint32_t        last_time;      /* sys_uptime value when last packet of flow was received */
 109         uint16_t        srcport;        /* TCP/UDP source port or equivalent */
 110         uint16_t        dstport;        /* TCP/UDP source port or equivalent */
 111         uint8_t         pad1;           /* pad */
 112         uint8_t         tcp_flags;      /* cumulative OR of TCP flags */
 113         uint8_t         proto;          /* IP protocol type */
 114         uint8_t         tos;            /* IP type of service */
 115         uint16_t        src_as;         /* AS number of the source */
 116         uint16_t        dst_as;         /* AS number of the destination */
 117         uint8_t         src_mask;       /* source address mask bits */
 118         uint8_t         dst_mask;       /* destination address prefix mask bits */
 119         uint16_t        pad2;
 120         struct in_addr  peer_nexthop;   /* v6: IP address of the nexthop within the peer (FIB)*/
 121 };
 122
 123 struct nfhdr_v6 {
 124         uint16_t        version;        /* version number */
 125         uint16_t        count;          /* # of records */
 126         uint32_t        msys_uptime;
 127         uint32_t        utc_sec;
 128         uint32_t        utc_nsec;
 129         uint32_t        sequence;       /* v5 flow sequence number */
 130         uint32_t        reserved;       /* v5 only */
 131 };
 132
 133 struct nfrec_v6 {
 134         struct in_addr  src_ina;
 135         struct in_addr  dst_ina;
 136         struct in_addr  nhop_ina;
 137         uint16_t        input;          /* SNMP index of input interface */
 138         uint16_t        output;         /* SNMP index of output interface */
 139         uint32_t        packets;        /* packets in the flow */
 140         uint32_t        octets;         /* layer 3 octets in the packets of the flow */
 141         uint32_t        start_time;     /* sys_uptime value at start of flow */
 142         uint32_t        last_time;      /* sys_uptime value when last packet of flow was received */
 143         uint16_t        srcport;        /* TCP/UDP source port or equivalent */
 144         uint16_t        dstport;        /* TCP/UDP source port or equivalent */
 145         uint8_t         pad1;           /* pad */
 146         uint8_t         tcp_flags;      /* cumulative OR of TCP flags */
 147         uint8_t         proto;          /* IP protocol type */
 148         uint8_t         tos;            /* IP type of service */
 149         uint16_t        src_as;         /* AS number of the source */
 150         uint16_t        dst_as;         /* AS number of the destination */
 151         uint8_t         src_mask;       /* source address mask bits */
 152         uint8_t         dst_mask;       /* destination address prefix mask bits */
 153         uint16_t        flags;
 154         struct in_addr  peer_nexthop;   /* v6: IP address of the nexthop within the peer (FIB)*/
 155 };
 156
 157 static void
 158 cnfp_v1_print(netdissect_options *ndo, const u_char *cp)
 159 {
 160         register const struct nfhdr_v1 *nh;
 161         register const struct nfrec_v1 *nr;
 162         struct protoent *pent;
 163         int nrecs, ver;
 164 #if 0
 165         time_t t;
 166 #endif
 167
 168         nh = (const struct nfhdr_v1 *)cp;
 169         ND_TCHECK(*nh);
 170
 171         ver = EXTRACT_16BITS(&nh->version);
 172         nrecs = EXTRACT_32BITS(&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 = EXTRACT_32BITS(&nh->utc_sec);
 180 #endif
 181
 182         ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 183                EXTRACT_32BITS(&nh->msys_uptime)/1000,
 184                EXTRACT_32BITS(&nh->msys_uptime)%1000,
 185                EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
 186
 187         nr = (const struct nfrec_v1 *)&nh[1];
 188
 189         ND_PRINT((ndo, "%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(*nr);
 199                 ND_PRINT((ndo, "\n  started %u.%03u, last %u.%03u",
 200                        EXTRACT_32BITS(&nr->start_time)/1000,
 201                        EXTRACT_32BITS(&nr->start_time)%1000,
 202                        EXTRACT_32BITS(&nr->last_time)/1000,
 203                        EXTRACT_32BITS(&nr->last_time)%1000));
 204
 205                 asbuf[0] = buf[0] = '\0';
 206                 ND_PRINT((ndo, "\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
 207                         EXTRACT_16BITS(&nr->srcport)));
 208
 209                 ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
 210                         EXTRACT_16BITS(&nr->dstport)));
 211
 212                 ND_PRINT((ndo, ">> %s\n    ", intoa(nr->nhop_ina.s_addr)));
 213
 214                 pent = getprotobynumber(nr->proto);
 215                 if (!pent || ndo->ndo_nflag)
 216                         ND_PRINT((ndo, "%u ", nr->proto));
 217                 else
 218                         ND_PRINT((ndo, "%s ", pent->p_name));
 219
 220                 /* tcp flags for tcp only */
 221                 if (pent && pent->p_proto == IPPROTO_TCP) {
 222                         int flags;
 223                         flags = nr->tcp_flags;
 224                         ND_PRINT((ndo, "%s%s%s%s%s%s%s",
 225                                 flags & TH_FIN  ? "F" : "",
 226                                 flags & TH_SYN  ? "S" : "",
 227                                 flags & TH_RST  ? "R" : "",
 228                                 flags & TH_PUSH ? "P" : "",
 229                                 flags & TH_ACK  ? "A" : "",
 230                                 flags & TH_URG  ? "U" : "",
 231                                 flags           ? " " : ""));
 232                 }
 233
 234                 buf[0]='\0';
 235                 ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
 236                        nr->tos,
 237                        EXTRACT_32BITS(&nr->packets),
 238                        EXTRACT_32BITS(&nr->octets), buf));
 239         }
 240         return;
 241
 242 trunc:
 243         ND_PRINT((ndo, "[|cnfp]"));
 244         return;
 245 }
 246
 247 static void
 248 cnfp_v5_print(netdissect_options *ndo, const u_char *cp)
 249 {
 250         register const struct nfhdr_v5 *nh;
 251         register const struct nfrec_v5 *nr;
 252         struct protoent *pent;
 253         int nrecs, ver;
 254 #if 0
 255         time_t t;
 256 #endif
 257
 258         nh = (const struct nfhdr_v5 *)cp;
 259         ND_TCHECK(*nh);
 260
 261         ver = EXTRACT_16BITS(&nh->version);
 262         nrecs = EXTRACT_32BITS(&nh->count);
 263 #if 0
 264         /*
 265          * This is seconds since the UN*X epoch, and is followed by
 266          * nanoseconds.  XXX - format it, rather than just dumping the
 267          * raw seconds-since-the-Epoch.
 268          */
 269         t = EXTRACT_32BITS(&nh->utc_sec);
 270 #endif
 271
 272         ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 273                EXTRACT_32BITS(&nh->msys_uptime)/1000,
 274                EXTRACT_32BITS(&nh->msys_uptime)%1000,
 275                EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
 276
 277         ND_PRINT((ndo, "#%u, ", EXTRACT_32BITS(&nh->sequence)));
 278         nr = (const struct nfrec_v5 *)&nh[1];
 279
 280         ND_PRINT((ndo, "%2u recs", nrecs));
 281
 282         for (; nrecs != 0; nr++, nrecs--) {
 283                 char buf[20];
 284                 char asbuf[20];
 285
 286                 /*
 287                  * Make sure we have the entire record.
 288                  */
 289                 ND_TCHECK(*nr);
 290                 ND_PRINT((ndo, "\n  started %u.%03u, last %u.%03u",
 291                        EXTRACT_32BITS(&nr->start_time)/1000,
 292                        EXTRACT_32BITS(&nr->start_time)%1000,
 293                        EXTRACT_32BITS(&nr->last_time)/1000,
 294                        EXTRACT_32BITS(&nr->last_time)%1000));
 295
 296                 asbuf[0] = buf[0] = '\0';
 297                 snprintf(buf, sizeof(buf), "/%u", nr->src_mask);
 298                 snprintf(asbuf, sizeof(asbuf), ":%u",
 299                         EXTRACT_16BITS(&nr->src_as));
 300                 ND_PRINT((ndo, "\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
 301                         EXTRACT_16BITS(&nr->srcport)));
 302
 303                 snprintf(buf, sizeof(buf), "/%d", nr->dst_mask);
 304                 snprintf(asbuf, sizeof(asbuf), ":%u",
 305                          EXTRACT_16BITS(&nr->dst_as));
 306                 ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
 307                         EXTRACT_16BITS(&nr->dstport)));
 308
 309                 ND_PRINT((ndo, ">> %s\n    ", intoa(nr->nhop_ina.s_addr)));
 310
 311                 pent = getprotobynumber(nr->proto);
 312                 if (!pent || ndo->ndo_nflag)
 313                         ND_PRINT((ndo, "%u ", nr->proto));
 314                 else
 315                         ND_PRINT((ndo, "%s ", pent->p_name));
 316
 317                 /* tcp flags for tcp only */
 318                 if (pent && pent->p_proto == IPPROTO_TCP) {
 319                         int flags;
 320                         flags = nr->tcp_flags;
 321                         ND_PRINT((ndo, "%s%s%s%s%s%s%s",
 322                                 flags & TH_FIN  ? "F" : "",
 323                                 flags & TH_SYN  ? "S" : "",
 324                                 flags & TH_RST  ? "R" : "",
 325                                 flags & TH_PUSH ? "P" : "",
 326                                 flags & TH_ACK  ? "A" : "",
 327                                 flags & TH_URG  ? "U" : "",
 328                                 flags           ? " " : ""));
 329                 }
 330
 331                 buf[0]='\0';
 332                 ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
 333                        nr->tos,
 334                        EXTRACT_32BITS(&nr->packets),
 335                        EXTRACT_32BITS(&nr->octets), buf));
 336         }
 337         return;
 338
 339 trunc:
 340         ND_PRINT((ndo, "[|cnfp]"));
 341         return;
 342 }
 343
 344 static void
 345 cnfp_v6_print(netdissect_options *ndo, const u_char *cp)
 346 {
 347         register const struct nfhdr_v6 *nh;
 348         register const struct nfrec_v6 *nr;
 349         struct protoent *pent;
 350         int nrecs, ver;
 351 #if 0
 352         time_t t;
 353 #endif
 354
 355         nh = (const struct nfhdr_v6 *)cp;
 356         ND_TCHECK(*nh);
 357
 358         ver = EXTRACT_16BITS(&nh->version);
 359         nrecs = EXTRACT_32BITS(&nh->count);
 360 #if 0
 361         /*
 362          * This is seconds since the UN*X epoch, and is followed by
 363          * nanoseconds.  XXX - format it, rather than just dumping the
 364          * raw seconds-since-the-Epoch.
 365          */
 366         t = EXTRACT_32BITS(&nh->utc_sec);
 367 #endif
 368
 369         ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 370                EXTRACT_32BITS(&nh->msys_uptime)/1000,
 371                EXTRACT_32BITS(&nh->msys_uptime)%1000,
 372                EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
 373
 374         ND_PRINT((ndo, "#%u, ", EXTRACT_32BITS(&nh->sequence)));
 375         nr = (const struct nfrec_v6 *)&nh[1];
 376
 377         ND_PRINT((ndo, "%2u recs", nrecs));
 378
 379         for (; nrecs != 0; nr++, nrecs--) {
 380                 char buf[20];
 381                 char asbuf[20];
 382
 383                 /*
 384                  * Make sure we have the entire record.
 385                  */
 386                 ND_TCHECK(*nr);
 387                 ND_PRINT((ndo, "\n  started %u.%03u, last %u.%03u",
 388                        EXTRACT_32BITS(&nr->start_time)/1000,
 389                        EXTRACT_32BITS(&nr->start_time)%1000,
 390                        EXTRACT_32BITS(&nr->last_time)/1000,
 391                        EXTRACT_32BITS(&nr->last_time)%1000));
 392
 393                 asbuf[0] = buf[0] = '\0';
 394                 snprintf(buf, sizeof(buf), "/%u", nr->src_mask);
 395                 snprintf(asbuf, sizeof(asbuf), ":%u",
 396                         EXTRACT_16BITS(&nr->src_as));
 397                 ND_PRINT((ndo, "\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
 398                         EXTRACT_16BITS(&nr->srcport)));
 399
 400                 snprintf(buf, sizeof(buf), "/%d", nr->dst_mask);
 401                 snprintf(asbuf, sizeof(asbuf), ":%u",
 402                          EXTRACT_16BITS(&nr->dst_as));
 403                 ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
 404                         EXTRACT_16BITS(&nr->dstport)));
 405
 406                 ND_PRINT((ndo, ">> %s\n    ", intoa(nr->nhop_ina.s_addr)));
 407
 408                 pent = getprotobynumber(nr->proto);
 409                 if (!pent || ndo->ndo_nflag)
 410                         ND_PRINT((ndo, "%u ", nr->proto));
 411                 else
 412                         ND_PRINT((ndo, "%s ", pent->p_name));
 413
 414                 /* tcp flags for tcp only */
 415                 if (pent && pent->p_proto == IPPROTO_TCP) {
 416                         int flags;
 417                         flags = nr->tcp_flags;
 418                         ND_PRINT((ndo, "%s%s%s%s%s%s%s",
 419                                 flags & TH_FIN  ? "F" : "",
 420                                 flags & TH_SYN  ? "S" : "",
 421                                 flags & TH_RST  ? "R" : "",
 422                                 flags & TH_PUSH ? "P" : "",
 423                                 flags & TH_ACK  ? "A" : "",
 424                                 flags & TH_URG  ? "U" : "",
 425                                 flags           ? " " : ""));
 426                 }
 427
 428                 buf[0]='\0';
 429                 snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
 430                          (EXTRACT_16BITS(&nr->flags) >> 8) & 0xff,
 431                          (EXTRACT_16BITS(&nr->flags)) & 0xff);
 432                 ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
 433                        nr->tos,
 434                        EXTRACT_32BITS(&nr->packets),
 435                        EXTRACT_32BITS(&nr->octets), buf));
 436         }
 437         return;
 438
 439 trunc:
 440         ND_PRINT((ndo, "[|cnfp]"));
 441         return;
 442 }
 443
 444 void
 445 cnfp_print(netdissect_options *ndo, const u_char *cp)
 446 {
 447         int ver;
 448
 449         /*
 450          * First 2 bytes are the version number.
 451          */
 452         ND_TCHECK2(*cp, 2);
 453         ver = EXTRACT_16BITS(cp);
 454         switch (ver) {
 455
 456         case 1:
 457                 cnfp_v1_print(ndo, cp);
 458                 break;
 459
 460         case 5:
 461                 cnfp_v5_print(ndo, cp);
 462                 break;
 463
 464         case 6:
 465                 cnfp_v6_print(ndo, cp);
 466                 break;
 467
 468         default:
 469                 ND_PRINT((ndo, "NetFlow v%x", ver));
 470                 break;
 471         }
 472         return;
 473
 474 trunc:
 475         ND_PRINT((ndo, "[|cnfp]"));
 476         return;
 477 }