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   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         nd_uint16_t     version;        /* version number */
  61         nd_uint16_t     count;          /* # of records */
  62         nd_uint32_t     msys_uptime;
  63         nd_uint32_t     utc_sec;
  64         nd_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         nd_uint16_t     input;          /* SNMP index of input interface */
  72         nd_uint16_t     output;         /* SNMP index of output interface */
  73         nd_uint32_t     packets;        /* packets in the flow */
  74         nd_uint32_t     octets;         /* layer 3 octets in the packets of the flow */
  75         nd_uint32_t     start_time;     /* sys_uptime value at start of flow */
  76         nd_uint32_t     last_time;      /* sys_uptime value when last packet of flow was received */
  77         nd_uint16_t     srcport;        /* TCP/UDP source port or equivalent */
  78         nd_uint16_t     dstport;        /* TCP/UDP source port or equivalent */
  79         nd_byte         pad1[2];        /* pad */
  80         nd_uint8_t      proto;          /* IP protocol type */
  81         nd_uint8_t      tos;            /* IP type of service */
  82         nd_uint8_t      tcp_flags;      /* cumulative OR of TCP flags */
  83         nd_byte         pad[3];         /* padding */
  84         nd_uint32_t     reserved;       /* unused */
  85 };
  86
  87 struct nfhdr_v5 {
  88         nd_uint16_t     version;        /* version number */
  89         nd_uint16_t     count;          /* # of records */
  90         nd_uint32_t     msys_uptime;
  91         nd_uint32_t     utc_sec;
  92         nd_uint32_t     utc_nsec;
  93         nd_uint32_t     sequence;       /* flow sequence number */
  94         nd_uint8_t      engine_type;    /* type of flow-switching engine */
  95         nd_uint8_t      engine_id;      /* slot number of the flow-switching engine */
  96         nd_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         nd_uint16_t     input;          /* SNMP index of input interface */
 104         nd_uint16_t     output;         /* SNMP index of output interface */
 105         nd_uint32_t     packets;        /* packets in the flow */
 106         nd_uint32_t     octets;         /* layer 3 octets in the packets of the flow */
 107         nd_uint32_t     start_time;     /* sys_uptime value at start of flow */
 108         nd_uint32_t     last_time;      /* sys_uptime value when last packet of flow was received */
 109         nd_uint16_t     srcport;        /* TCP/UDP source port or equivalent */
 110         nd_uint16_t     dstport;        /* TCP/UDP source port or equivalent */
 111         nd_byte         pad1;           /* pad */
 112         nd_uint8_t      tcp_flags;      /* cumulative OR of TCP flags */
 113         nd_uint8_t      proto;          /* IP protocol type */
 114         nd_uint8_t      tos;            /* IP type of service */
 115         nd_uint16_t     src_as;         /* AS number of the source */
 116         nd_uint16_t     dst_as;         /* AS number of the destination */
 117         nd_uint8_t      src_mask;       /* source address mask bits */
 118         nd_uint8_t      dst_mask;       /* destination address prefix mask bits */
 119         nd_byte         pad2[2];
 120         struct in_addr  peer_nexthop;   /* v6: IP address of the nexthop within the peer (FIB)*/
 121 };
 122
 123 struct nfhdr_v6 {
 124         nd_uint16_t     version;        /* version number */
 125         nd_uint16_t     count;          /* # of records */
 126         nd_uint32_t     msys_uptime;
 127         nd_uint32_t     utc_sec;
 128         nd_uint32_t     utc_nsec;
 129         nd_uint32_t     sequence;       /* v5 flow sequence number */
 130         nd_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         nd_uint16_t     input;          /* SNMP index of input interface */
 138         nd_uint16_t     output;         /* SNMP index of output interface */
 139         nd_uint32_t     packets;        /* packets in the flow */
 140         nd_uint32_t     octets;         /* layer 3 octets in the packets of the flow */
 141         nd_uint32_t     start_time;     /* sys_uptime value at start of flow */
 142         nd_uint32_t     last_time;      /* sys_uptime value when last packet of flow was received */
 143         nd_uint16_t     srcport;        /* TCP/UDP source port or equivalent */
 144         nd_uint16_t     dstport;        /* TCP/UDP source port or equivalent */
 145         nd_byte         pad1;           /* pad */
 146         nd_uint8_t      tcp_flags;      /* cumulative OR of TCP flags */
 147         nd_uint8_t      proto;          /* IP protocol type */
 148         nd_uint8_t      tos;            /* IP type of service */
 149         nd_uint16_t     src_as;         /* AS number of the source */
 150         nd_uint16_t     dst_as;         /* AS number of the destination */
 151         nd_uint8_t      src_mask;       /* source address mask bits */
 152         nd_uint8_t      dst_mask;       /* destination address prefix mask bits */
 153         nd_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         const struct nfhdr_v1 *nh;
 161         const struct nfrec_v1 *nr;
 162         const char *p_name;
 163         uint8_t proto;
 164         u_int nrecs, ver;
 165 #if 0
 166         time_t t;
 167 #endif
 168
 169         nh = (const struct nfhdr_v1 *)cp;
 170         ND_TCHECK_SIZE(nh);
 171
 172         ver = EXTRACT_BE_U_2(nh->version);
 173         nrecs = EXTRACT_BE_U_4(nh->count);
 174 #if 0
 175         /*
 176          * This is seconds since the UN*X epoch, and is followed by
 177          * nanoseconds.  XXX - format it, rather than just dumping the
 178          * raw seconds-since-the-Epoch.
 179          */
 180         t = EXTRACT_BE_U_4(nh->utc_sec);
 181 #endif
 182
 183         ND_PRINT("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 184                EXTRACT_BE_U_4(nh->msys_uptime)/1000,
 185                EXTRACT_BE_U_4(nh->msys_uptime)%1000,
 186                EXTRACT_BE_U_4(nh->utc_sec), EXTRACT_BE_U_4(nh->utc_nsec));
 187
 188         nr = (const struct nfrec_v1 *)&nh[1];
 189
 190         ND_PRINT("%2u recs", nrecs);
 191
 192         for (; nrecs != 0; nr++, nrecs--) {
 193                 char buf[20];
 194                 char asbuf[20];
 195
 196                 /*
 197                  * Make sure we have the entire record.
 198                  */
 199                 ND_TCHECK_SIZE(nr);
 200                 ND_PRINT("\n  started %u.%03u, last %u.%03u",
 201                        EXTRACT_BE_U_4(nr->start_time)/1000,
 202                        EXTRACT_BE_U_4(nr->start_time)%1000,
 203                        EXTRACT_BE_U_4(nr->last_time)/1000,
 204                        EXTRACT_BE_U_4(nr->last_time)%1000);
 205
 206                 asbuf[0] = buf[0] = '\0';
 207                 ND_PRINT("\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
 208                         EXTRACT_BE_U_2(nr->srcport));
 209
 210                 ND_PRINT("> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
 211                         EXTRACT_BE_U_2(nr->dstport));
 212
 213                 ND_PRINT(">> %s\n    ", intoa(nr->nhop_ina.s_addr));
 214
 215                 proto = EXTRACT_U_1(nr->proto);
 216                 if (!ndo->ndo_nflag && (p_name = netdb_protoname(proto)) != NULL)
 217                         ND_PRINT("%s ", p_name);
 218                 else
 219                         ND_PRINT("%u ", proto);
 220
 221                 /* tcp flags for tcp only */
 222                 if (proto == IPPROTO_TCP) {
 223                         u_int flags;
 224                         flags = EXTRACT_U_1(nr->tcp_flags);
 225                         ND_PRINT("%s%s%s%s%s%s%s",
 226                                 flags & TH_FIN  ? "F" : "",
 227                                 flags & TH_SYN  ? "S" : "",
 228                                 flags & TH_RST  ? "R" : "",
 229                                 flags & TH_PUSH ? "P" : "",
 230                                 flags & TH_ACK  ? "A" : "",
 231                                 flags & TH_URG  ? "U" : "",
 232                                 flags           ? " " : "");
 233                 }
 234
 235                 buf[0]='\0';
 236                 ND_PRINT("tos %u, %u (%u octets) %s",
 237                        EXTRACT_U_1(nr->tos),
 238                        EXTRACT_BE_U_4(nr->packets),
 239                        EXTRACT_BE_U_4(nr->octets), buf);
 240         }
 241         return;
 242
 243 trunc:
 244         ND_PRINT("[|cnfp]");
 245         return;
 246 }
 247
 248 static void
 249 cnfp_v5_print(netdissect_options *ndo, const u_char *cp)
 250 {
 251         const struct nfhdr_v5 *nh;
 252         const struct nfrec_v5 *nr;
 253         const char *p_name;
 254         uint8_t proto;
 255         u_int nrecs, ver;
 256 #if 0
 257         time_t t;
 258 #endif
 259
 260         nh = (const struct nfhdr_v5 *)cp;
 261         ND_TCHECK_SIZE(nh);
 262
 263         ver = EXTRACT_BE_U_2(nh->version);
 264         nrecs = EXTRACT_BE_U_4(nh->count);
 265 #if 0
 266         /*
 267          * This is seconds since the UN*X epoch, and is followed by
 268          * nanoseconds.  XXX - format it, rather than just dumping the
 269          * raw seconds-since-the-Epoch.
 270          */
 271         t = EXTRACT_BE_U_4(nh->utc_sec);
 272 #endif
 273
 274         ND_PRINT("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 275                EXTRACT_BE_U_4(nh->msys_uptime)/1000,
 276                EXTRACT_BE_U_4(nh->msys_uptime)%1000,
 277                EXTRACT_BE_U_4(nh->utc_sec), EXTRACT_BE_U_4(nh->utc_nsec));
 278
 279         ND_PRINT("#%u, ", EXTRACT_BE_U_4(nh->sequence));
 280         nr = (const struct nfrec_v5 *)&nh[1];
 281
 282         ND_PRINT("%2u recs", nrecs);
 283
 284         for (; nrecs != 0; nr++, nrecs--) {
 285                 char buf[20];
 286                 char asbuf[20];
 287
 288                 /*
 289                  * Make sure we have the entire record.
 290                  */
 291                 ND_TCHECK_SIZE(nr);
 292                 ND_PRINT("\n  started %u.%03u, last %u.%03u",
 293                        EXTRACT_BE_U_4(nr->start_time)/1000,
 294                        EXTRACT_BE_U_4(nr->start_time)%1000,
 295                        EXTRACT_BE_U_4(nr->last_time)/1000,
 296                        EXTRACT_BE_U_4(nr->last_time)%1000);
 297
 298                 asbuf[0] = buf[0] = '\0';
 299                 snprintf(buf, sizeof(buf), "/%u", EXTRACT_U_1(nr->src_mask));
 300                 snprintf(asbuf, sizeof(asbuf), ":%u",
 301                         EXTRACT_BE_U_2(nr->src_as));
 302                 ND_PRINT("\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
 303                         EXTRACT_BE_U_2(nr->srcport));
 304
 305                 snprintf(buf, sizeof(buf), "/%u", EXTRACT_U_1(nr->dst_mask));
 306                 snprintf(asbuf, sizeof(asbuf), ":%u",
 307                          EXTRACT_BE_U_2(nr->dst_as));
 308                 ND_PRINT("> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
 309                         EXTRACT_BE_U_2(nr->dstport));
 310
 311                 ND_PRINT(">> %s\n    ", intoa(nr->nhop_ina.s_addr));
 312
 313                 proto = EXTRACT_U_1(nr->proto);
 314                 if (!ndo->ndo_nflag && (p_name = netdb_protoname(proto)) != NULL)
 315                         ND_PRINT("%s ", p_name);
 316                 else
 317                         ND_PRINT("%u ", proto);
 318
 319                 /* tcp flags for tcp only */
 320                 if (proto == IPPROTO_TCP) {
 321                         u_int flags;
 322                         flags = EXTRACT_U_1(nr->tcp_flags);
 323                         ND_PRINT("%s%s%s%s%s%s%s",
 324                                 flags & TH_FIN  ? "F" : "",
 325                                 flags & TH_SYN  ? "S" : "",
 326                                 flags & TH_RST  ? "R" : "",
 327                                 flags & TH_PUSH ? "P" : "",
 328                                 flags & TH_ACK  ? "A" : "",
 329                                 flags & TH_URG  ? "U" : "",
 330                                 flags           ? " " : "");
 331                 }
 332
 333                 buf[0]='\0';
 334                 ND_PRINT("tos %u, %u (%u octets) %s",
 335                        EXTRACT_U_1(nr->tos),
 336                        EXTRACT_BE_U_4(nr->packets),
 337                        EXTRACT_BE_U_4(nr->octets), buf);
 338         }
 339         return;
 340
 341 trunc:
 342         ND_PRINT("[|cnfp]");
 343         return;
 344 }
 345
 346 static void
 347 cnfp_v6_print(netdissect_options *ndo, const u_char *cp)
 348 {
 349         const struct nfhdr_v6 *nh;
 350         const struct nfrec_v6 *nr;
 351         const char *p_name;
 352         uint8_t proto;
 353         u_int nrecs, ver;
 354 #if 0
 355         time_t t;
 356 #endif
 357
 358         nh = (const struct nfhdr_v6 *)cp;
 359         ND_TCHECK_SIZE(nh);
 360
 361         ver = EXTRACT_BE_U_2(nh->version);
 362         nrecs = EXTRACT_BE_U_4(nh->count);
 363 #if 0
 364         /*
 365          * This is seconds since the UN*X epoch, and is followed by
 366          * nanoseconds.  XXX - format it, rather than just dumping the
 367          * raw seconds-since-the-Epoch.
 368          */
 369         t = EXTRACT_BE_U_4(nh->utc_sec);
 370 #endif
 371
 372         ND_PRINT("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 373                EXTRACT_BE_U_4(nh->msys_uptime)/1000,
 374                EXTRACT_BE_U_4(nh->msys_uptime)%1000,
 375                EXTRACT_BE_U_4(nh->utc_sec), EXTRACT_BE_U_4(nh->utc_nsec));
 376
 377         ND_PRINT("#%u, ", EXTRACT_BE_U_4(nh->sequence));
 378         nr = (const struct nfrec_v6 *)&nh[1];
 379
 380         ND_PRINT("%2u recs", nrecs);
 381
 382         for (; nrecs != 0; nr++, nrecs--) {
 383                 char buf[20];
 384                 char asbuf[20];
 385
 386                 /*
 387                  * Make sure we have the entire record.
 388                  */
 389                 ND_TCHECK_SIZE(nr);
 390                 ND_PRINT("\n  started %u.%03u, last %u.%03u",
 391                        EXTRACT_BE_U_4(nr->start_time)/1000,
 392                        EXTRACT_BE_U_4(nr->start_time)%1000,
 393                        EXTRACT_BE_U_4(nr->last_time)/1000,
 394                        EXTRACT_BE_U_4(nr->last_time)%1000);
 395
 396                 asbuf[0] = buf[0] = '\0';
 397                 snprintf(buf, sizeof(buf), "/%u", EXTRACT_U_1(nr->src_mask));
 398                 snprintf(asbuf, sizeof(asbuf), ":%u",
 399                         EXTRACT_BE_U_2(nr->src_as));
 400                 ND_PRINT("\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
 401                         EXTRACT_BE_U_2(nr->srcport));
 402
 403                 snprintf(buf, sizeof(buf), "/%u", EXTRACT_U_1(nr->dst_mask));
 404                 snprintf(asbuf, sizeof(asbuf), ":%u",
 405                          EXTRACT_BE_U_2(nr->dst_as));
 406                 ND_PRINT("> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
 407                         EXTRACT_BE_U_2(nr->dstport));
 408
 409                 ND_PRINT(">> %s\n    ", intoa(nr->nhop_ina.s_addr));
 410
 411                 proto = EXTRACT_U_1(nr->proto);
 412                 if (!ndo->ndo_nflag && (p_name = netdb_protoname(proto)) != NULL)
 413                         ND_PRINT("%s ", p_name);
 414                 else
 415                         ND_PRINT("%u ", proto);
 416
 417                 /* tcp flags for tcp only */
 418                 if (proto == IPPROTO_TCP) {
 419                         u_int flags;
 420                         flags = EXTRACT_U_1(nr->tcp_flags);
 421                         ND_PRINT("%s%s%s%s%s%s%s",
 422                                 flags & TH_FIN  ? "F" : "",
 423                                 flags & TH_SYN  ? "S" : "",
 424                                 flags & TH_RST  ? "R" : "",
 425                                 flags & TH_PUSH ? "P" : "",
 426                                 flags & TH_ACK  ? "A" : "",
 427                                 flags & TH_URG  ? "U" : "",
 428                                 flags           ? " " : "");
 429                 }
 430
 431                 buf[0]='\0';
 432                 snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
 433                          (EXTRACT_BE_U_2(nr->flags) >> 8) & 0xff,
 434                          (EXTRACT_BE_U_2(nr->flags)) & 0xff);
 435                 ND_PRINT("tos %u, %u (%u octets) %s",
 436                        EXTRACT_U_1(nr->tos),
 437                        EXTRACT_BE_U_4(nr->packets),
 438                        EXTRACT_BE_U_4(nr->octets), buf);
 439         }
 440         return;
 441
 442 trunc:
 443         ND_PRINT("[|cnfp]");
 444         return;
 445 }
 446
 447 void
 448 cnfp_print(netdissect_options *ndo, const u_char *cp)
 449 {
 450         int ver;
 451
 452         /*
 453          * First 2 bytes are the version number.
 454          */
 455         ND_TCHECK_2(cp);
 456         ver = EXTRACT_BE_U_2(cp);
 457         switch (ver) {
 458
 459         case 1:
 460                 cnfp_v1_print(ndo, cp);
 461                 break;
 462
 463         case 5:
 464                 cnfp_v5_print(ndo, cp);
 465                 break;
 466
 467         case 6:
 468                 cnfp_v6_print(ndo, cp);
 469                 break;
 470
 471         default:
 472                 ND_PRINT("NetFlow v%x", ver);
 473                 break;
 474         }
 475         return;
 476
 477 trunc:
 478         ND_PRINT("[|cnfp]");
 479         return;
 480 }