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  *    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 #define ND_LONGJMP_FROM_TCHECK
  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         nd_uint16_t     version;        /* version number */
  59         nd_uint16_t     count;          /* # of records */
  60         nd_uint32_t     msys_uptime;
  61         nd_uint32_t     utc_sec;
  62         nd_uint32_t     utc_nsec;
  63 };
  64
  65 struct nfrec_v1 {
  66         nd_ipv4         src_ina;
  67         nd_ipv4         dst_ina;
  68         nd_ipv4         nhop_ina;
  69         nd_uint16_t     input;          /* SNMP index of input interface */
  70         nd_uint16_t     output;         /* SNMP index of output interface */
  71         nd_uint32_t     packets;        /* packets in the flow */
  72         nd_uint32_t     octets;         /* layer 3 octets in the packets of the flow */
  73         nd_uint32_t     start_time;     /* sys_uptime value at start of flow */
  74         nd_uint32_t     last_time;      /* sys_uptime value when last packet of flow was received */
  75         nd_uint16_t     srcport;        /* TCP/UDP source port or equivalent */
  76         nd_uint16_t     dstport;        /* TCP/UDP source port or equivalent */
  77         nd_byte         pad1[2];        /* pad */
  78         nd_uint8_t      proto;          /* IP protocol type */
  79         nd_uint8_t      tos;            /* IP type of service */
  80         nd_uint8_t      tcp_flags;      /* cumulative OR of TCP flags */
  81         nd_byte         pad[3];         /* padding */
  82         nd_uint32_t     reserved;       /* unused */
  83 };
  84
  85 struct nfhdr_v5 {
  86         nd_uint16_t     version;        /* version number */
  87         nd_uint16_t     count;          /* # of records */
  88         nd_uint32_t     msys_uptime;
  89         nd_uint32_t     utc_sec;
  90         nd_uint32_t     utc_nsec;
  91         nd_uint32_t     sequence;       /* flow sequence number */
  92         nd_uint8_t      engine_type;    /* type of flow-switching engine */
  93         nd_uint8_t      engine_id;      /* slot number of the flow-switching engine */
  94         nd_uint16_t     sampling_interval; /* sampling mode and interval */
  95 };
  96
  97 struct nfrec_v5 {
  98         nd_ipv4         src_ina;
  99         nd_ipv4         dst_ina;
 100         nd_ipv4         nhop_ina;
 101         nd_uint16_t     input;          /* SNMP index of input interface */
 102         nd_uint16_t     output;         /* SNMP index of output interface */
 103         nd_uint32_t     packets;        /* packets in the flow */
 104         nd_uint32_t     octets;         /* layer 3 octets in the packets of the flow */
 105         nd_uint32_t     start_time;     /* sys_uptime value at start of flow */
 106         nd_uint32_t     last_time;      /* sys_uptime value when last packet of flow was received */
 107         nd_uint16_t     srcport;        /* TCP/UDP source port or equivalent */
 108         nd_uint16_t     dstport;        /* TCP/UDP source port or equivalent */
 109         nd_byte         pad1;           /* pad */
 110         nd_uint8_t      tcp_flags;      /* cumulative OR of TCP flags */
 111         nd_uint8_t      proto;          /* IP protocol type */
 112         nd_uint8_t      tos;            /* IP type of service */
 113         nd_uint16_t     src_as;         /* AS number of the source */
 114         nd_uint16_t     dst_as;         /* AS number of the destination */
 115         nd_uint8_t      src_mask;       /* source address mask bits */
 116         nd_uint8_t      dst_mask;       /* destination address prefix mask bits */
 117         nd_byte         pad2[2];
 118         nd_ipv4         peer_nexthop;   /* v6: IP address of the nexthop within the peer (FIB)*/
 119 };
 120
 121 struct nfhdr_v6 {
 122         nd_uint16_t     version;        /* version number */
 123         nd_uint16_t     count;          /* # of records */
 124         nd_uint32_t     msys_uptime;
 125         nd_uint32_t     utc_sec;
 126         nd_uint32_t     utc_nsec;
 127         nd_uint32_t     sequence;       /* v5 flow sequence number */
 128         nd_uint32_t     reserved;       /* v5 only */
 129 };
 130
 131 struct nfrec_v6 {
 132         nd_ipv4         src_ina;
 133         nd_ipv4         dst_ina;
 134         nd_ipv4         nhop_ina;
 135         nd_uint16_t     input;          /* SNMP index of input interface */
 136         nd_uint16_t     output;         /* SNMP index of output interface */
 137         nd_uint32_t     packets;        /* packets in the flow */
 138         nd_uint32_t     octets;         /* layer 3 octets in the packets of the flow */
 139         nd_uint32_t     start_time;     /* sys_uptime value at start of flow */
 140         nd_uint32_t     last_time;      /* sys_uptime value when last packet of flow was received */
 141         nd_uint16_t     srcport;        /* TCP/UDP source port or equivalent */
 142         nd_uint16_t     dstport;        /* TCP/UDP source port or equivalent */
 143         nd_byte         pad1;           /* pad */
 144         nd_uint8_t      tcp_flags;      /* cumulative OR of TCP flags */
 145         nd_uint8_t      proto;          /* IP protocol type */
 146         nd_uint8_t      tos;            /* IP type of service */
 147         nd_uint16_t     src_as;         /* AS number of the source */
 148         nd_uint16_t     dst_as;         /* AS number of the destination */
 149         nd_uint8_t      src_mask;       /* source address mask bits */
 150         nd_uint8_t      dst_mask;       /* destination address prefix mask bits */
 151         nd_uint16_t     flags;
 152         nd_ipv4         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         const struct nfhdr_v1 *nh;
 159         const struct nfrec_v1 *nr;
 160         const char *p_name;
 161         uint8_t proto;
 162         u_int nrecs, ver;
 163 #if 0
 164         time_t t;
 165 #endif
 166
 167         nh = (const struct nfhdr_v1 *)cp;
 168
 169         ver = GET_BE_U_2(nh->version);
 170         nrecs = GET_BE_U_4(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 = GET_BE_U_4(nh->utc_sec);
 178 #endif
 179
 180         ND_PRINT("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 181                GET_BE_U_4(nh->msys_uptime)/1000,
 182                GET_BE_U_4(nh->msys_uptime)%1000,
 183                GET_BE_U_4(nh->utc_sec), GET_BE_U_4(nh->utc_nsec));
 184
 185         nr = (const struct nfrec_v1 *)&nh[1];
 186
 187         ND_PRINT("%2u recs", nrecs);
 188
 189         for (; nrecs != 0; nr++, nrecs--) {
 190                 ND_PRINT("\n  started %u.%03u, last %u.%03u",
 191                        GET_BE_U_4(nr->start_time)/1000,
 192                        GET_BE_U_4(nr->start_time)%1000,
 193                        GET_BE_U_4(nr->last_time)/1000,
 194                        GET_BE_U_4(nr->last_time)%1000);
 195
 196                 ND_PRINT("\n    %s:%u ",
 197                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->src_ina)),
 198                         GET_BE_U_2(nr->srcport));
 199
 200                 ND_PRINT("> %s:%u ",
 201                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->dst_ina)),
 202                         GET_BE_U_2(nr->dstport));
 203
 204                 ND_PRINT(">> %s\n    ",
 205                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->nhop_ina)));
 206
 207                 proto = GET_U_1(nr->proto);
 208                 if (!ndo->ndo_nflag && (p_name = netdb_protoname(proto)) != NULL)
 209                         ND_PRINT("%s ", p_name);
 210                 else
 211                         ND_PRINT("%u ", proto);
 212
 213                 /* tcp flags for tcp only */
 214                 if (proto == IPPROTO_TCP) {
 215                         u_int flags;
 216                         flags = GET_U_1(nr->tcp_flags);
 217                         if (flags)
 218                                 ND_PRINT("%s ", bittok2str_nosep(tcp_flag_values, "", flags));
 219                 }
 220
 221                 ND_PRINT("tos %u, %u (%u octets)",
 222                        GET_U_1(nr->tos),
 223                        GET_BE_U_4(nr->packets),
 224                        GET_BE_U_4(nr->octets));
 225                 /* This was not all of struct nfrec_v1. */
 226                 ND_TCHECK_SIZE(nr);
 227         }
 228 }
 229
 230 static void
 231 cnfp_v5_print(netdissect_options *ndo, const u_char *cp)
 232 {
 233         const struct nfhdr_v5 *nh;
 234         const struct nfrec_v5 *nr;
 235         const char *p_name;
 236         uint8_t proto;
 237         u_int nrecs, ver;
 238 #if 0
 239         time_t t;
 240 #endif
 241
 242         nh = (const struct nfhdr_v5 *)cp;
 243
 244         ver = GET_BE_U_2(nh->version);
 245         nrecs = GET_BE_U_4(nh->count);
 246 #if 0
 247         /*
 248          * This is seconds since the UN*X epoch, and is followed by
 249          * nanoseconds.  XXX - format it, rather than just dumping the
 250          * raw seconds-since-the-Epoch.
 251          */
 252         t = GET_BE_U_4(nh->utc_sec);
 253 #endif
 254
 255         ND_PRINT("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 256                GET_BE_U_4(nh->msys_uptime)/1000,
 257                GET_BE_U_4(nh->msys_uptime)%1000,
 258                GET_BE_U_4(nh->utc_sec), GET_BE_U_4(nh->utc_nsec));
 259
 260         ND_PRINT("#%u, ", GET_BE_U_4(nh->sequence));
 261         /* This was not all of struct nfhdr_v5. */
 262         ND_TCHECK_SIZE(nh);
 263         nr = (const struct nfrec_v5 *)&nh[1];
 264
 265         ND_PRINT("%2u recs", nrecs);
 266
 267         for (; nrecs != 0; nr++, nrecs--) {
 268                 ND_PRINT("\n  started %u.%03u, last %u.%03u",
 269                        GET_BE_U_4(nr->start_time)/1000,
 270                        GET_BE_U_4(nr->start_time)%1000,
 271                        GET_BE_U_4(nr->last_time)/1000,
 272                        GET_BE_U_4(nr->last_time)%1000);
 273
 274                 ND_PRINT("\n    %s/%u:%u:%u ",
 275                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->src_ina)),
 276                         GET_U_1(nr->src_mask), GET_BE_U_2(nr->src_as),
 277                         GET_BE_U_2(nr->srcport));
 278
 279                 ND_PRINT("> %s/%u:%u:%u ",
 280                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->dst_ina)),
 281                         GET_U_1(nr->dst_mask), GET_BE_U_2(nr->dst_as),
 282                         GET_BE_U_2(nr->dstport));
 283
 284                 ND_PRINT(">> %s\n    ",
 285                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->nhop_ina)));
 286
 287                 proto = GET_U_1(nr->proto);
 288                 if (!ndo->ndo_nflag && (p_name = netdb_protoname(proto)) != NULL)
 289                         ND_PRINT("%s ", p_name);
 290                 else
 291                         ND_PRINT("%u ", proto);
 292
 293                 /* tcp flags for tcp only */
 294                 if (proto == IPPROTO_TCP) {
 295                         u_int flags;
 296                         flags = GET_U_1(nr->tcp_flags);
 297                         if (flags)
 298                                 ND_PRINT("%s ", bittok2str_nosep(tcp_flag_values, "", flags));
 299                 }
 300
 301                 ND_PRINT("tos %u, %u (%u octets)",
 302                        GET_U_1(nr->tos),
 303                        GET_BE_U_4(nr->packets),
 304                        GET_BE_U_4(nr->octets));
 305                 /* This was not all of struct nfrec_v5. */
 306                 ND_TCHECK_SIZE(nr);
 307         }
 308 }
 309
 310 static void
 311 cnfp_v6_print(netdissect_options *ndo, const u_char *cp)
 312 {
 313         const struct nfhdr_v6 *nh;
 314         const struct nfrec_v6 *nr;
 315         const char *p_name;
 316         uint8_t proto;
 317         u_int nrecs, ver;
 318 #if 0
 319         time_t t;
 320 #endif
 321
 322         nh = (const struct nfhdr_v6 *)cp;
 323
 324         ver = GET_BE_U_2(nh->version);
 325         nrecs = GET_BE_U_4(nh->count);
 326 #if 0
 327         /*
 328          * This is seconds since the UN*X epoch, and is followed by
 329          * nanoseconds.  XXX - format it, rather than just dumping the
 330          * raw seconds-since-the-Epoch.
 331          */
 332         t = GET_BE_U_4(nh->utc_sec);
 333 #endif
 334
 335         ND_PRINT("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 336                GET_BE_U_4(nh->msys_uptime)/1000,
 337                GET_BE_U_4(nh->msys_uptime)%1000,
 338                GET_BE_U_4(nh->utc_sec), GET_BE_U_4(nh->utc_nsec));
 339
 340         ND_PRINT("#%u, ", GET_BE_U_4(nh->sequence));
 341         /* This was not all of struct nfhdr_v6. */
 342         ND_TCHECK_SIZE(nh);
 343         nr = (const struct nfrec_v6 *)&nh[1];
 344
 345         ND_PRINT("%2u recs", nrecs);
 346
 347         for (; nrecs != 0; nr++, nrecs--) {
 348                 ND_PRINT("\n  started %u.%03u, last %u.%03u",
 349                        GET_BE_U_4(nr->start_time)/1000,
 350                        GET_BE_U_4(nr->start_time)%1000,
 351                        GET_BE_U_4(nr->last_time)/1000,
 352                        GET_BE_U_4(nr->last_time)%1000);
 353
 354                 ND_PRINT("\n    %s/%u:%u:%u ",
 355                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->src_ina)),
 356                         GET_U_1(nr->src_mask), GET_BE_U_2(nr->src_as),
 357                         GET_BE_U_2(nr->srcport));
 358
 359                 ND_PRINT("> %s/%u:%u:%u ",
 360                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->dst_ina)),
 361                         GET_U_1(nr->dst_mask), GET_BE_U_2(nr->dst_as),
 362                         GET_BE_U_2(nr->dstport));
 363
 364                 ND_PRINT(">> %s\n    ",
 365                         intoa(GET_IPV4_TO_NETWORK_ORDER(nr->nhop_ina)));
 366
 367                 proto = GET_U_1(nr->proto);
 368                 if (!ndo->ndo_nflag && (p_name = netdb_protoname(proto)) != NULL)
 369                         ND_PRINT("%s ", p_name);
 370                 else
 371                         ND_PRINT("%u ", proto);
 372
 373                 /* tcp flags for tcp only */
 374                 if (proto == IPPROTO_TCP) {
 375                         u_int flags;
 376                         flags = GET_U_1(nr->tcp_flags);
 377                         if (flags)
 378                                 ND_PRINT("%s ", bittok2str_nosep(tcp_flag_values, "", flags));
 379                 }
 380
 381                 ND_PRINT("tos %u, %u (%u octets) (%u<>%u encaps)",
 382                        GET_U_1(nr->tos),
 383                        GET_BE_U_4(nr->packets),
 384                        GET_BE_U_4(nr->octets),
 385                        (GET_BE_U_2(nr->flags) >> 8) & 0xff,
 386                        (GET_BE_U_2(nr->flags)) & 0xff);
 387                 /* This was not all of struct nfrec_v6. */
 388                 ND_TCHECK_SIZE(nr);
 389         }
 390 }
 391
 392 void
 393 cnfp_print(netdissect_options *ndo, const u_char *cp)
 394 {
 395         int ver;
 396
 397         /*
 398          * First 2 bytes are the version number.
 399          */
 400         ndo->ndo_protocol = "cnfp";
 401         ver = GET_BE_U_2(cp);
 402         switch (ver) {
 403
 404         case 1:
 405                 cnfp_v1_print(ndo, cp);
 406                 break;
 407
 408         case 5:
 409                 cnfp_v5_print(ndo, cp);
 410                 break;
 411
 412         case 6:
 413                 cnfp_v6_print(ndo, cp);
 414                 break;
 415
 416         default:
 417                 ND_PRINT("NetFlow v%x", ver);
 418                 break;
 419         }
 420 }