dist/tcpdump/print-cnfp.c

   1 /*      $NetBSD: print-cnfp.c,v 1.5 2007/07/24 11:53:43 drochner Exp $  */
   2
   3 /*      $OpenBSD: print-cnfp.c,v 1.2 1998/06/25 20:26:59 mickey Exp $   */
   4
   5 /*
   6  * Copyright (c) 1998 Michael Shalayeff
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 /* Cisco NetFlow protocol */
  31
  32 #include <sys/cdefs.h>
  33 #ifndef lint
  34 #if 0
  35 static const char rcsid[] _U_ =
  36     "@(#) Header: /tcpdump/master/tcpdump/print-cnfp.c,v 1.16.2.1 2005/04/20 20:53:39 guy Exp";
  37 #else
  38 __RCSID("$NetBSD: print-cnfp.c,v 1.5 2007/07/24 11:53:43 drochner Exp $");
  39 #endif
  40 #endif
  41
  42 #ifdef HAVE_CONFIG_H
  43 #include "config.h"
  44 #endif
  45
  46 #include <tcpdump-stdinc.h>
  47
  48 #include <stdio.h>
  49 #include <string.h>
  50
  51 #include "interface.h"
  52 #include "addrtoname.h"
  53 #include "extract.h"
  54
  55 #include "tcp.h"
  56 #include "ipproto.h"
  57
  58 struct nfhdr {
  59         u_int32_t       ver_cnt;        /* version [15], and # of records */
  60         u_int32_t       msys_uptime;
  61         u_int32_t       utc_sec;
  62         u_int32_t       utc_nsec;
  63         u_int32_t       sequence;       /* v5 flow sequence number */
  64         u_int32_t       reserved;       /* v5 only */
  65 };
  66
  67 struct nfrec {
  68         struct in_addr  src_ina;
  69         struct in_addr  dst_ina;
  70         struct in_addr  nhop_ina;
  71         u_int32_t       ifaces;         /* src,dst ifaces */
  72         u_int32_t       packets;
  73         u_int32_t       octets;
  74         u_int32_t       start_time;     /* sys_uptime value */
  75         u_int32_t       last_time;      /* sys_uptime value */
  76         u_int32_t       ports;          /* src,dst ports */
  77         u_int32_t       proto_tos;      /* proto, tos, pad, flags(v5) */
  78         u_int32_t       asses;          /* v1: flags; v5: src,dst AS */
  79         u_int32_t       masks;          /* src,dst addr prefix; v6: encaps */
  80         struct in_addr  peer_nexthop;   /* v6: IP address of the nexthop within the peer (FIB)*/
  81 };
  82
  83 void
  84 cnfp_print(const u_char *cp, const u_char *bp _U_)
  85 {
  86         register const struct nfhdr *nh;
  87         register const struct nfrec *nr;
  88         struct protoent *pent;
  89         int nrecs, ver;
  90 #if 0
  91         time_t t;
  92 #endif
  93
  94         nh = (const struct nfhdr *)cp;
  95
  96         if ((const u_char *)(nh + 1) > snapend)
  97                 return;
  98
  99         nrecs = EXTRACT_32BITS(&nh->ver_cnt) & 0xffff;
 100         ver = (EXTRACT_32BITS(&nh->ver_cnt) & 0xffff0000) >> 16;
 101 #if 0
 102         /*
 103          * This is seconds since the UN*X epoch, and is followed by
 104          * nanoseconds.  XXX - format it, rather than just dumping the
 105          * raw seconds-since-the-Epoch.
 106          */
 107         t = EXTRACT_32BITS(&nh->utc_sec);
 108 #endif
 109
 110         printf("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 111                EXTRACT_32BITS(&nh->msys_uptime)/1000,
 112                EXTRACT_32BITS(&nh->msys_uptime)%1000,
 113                EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec));
 114
 115         if (ver == 5 || ver == 6) {
 116                 printf("#%u, ", EXTRACT_32BITS(&nh->sequence));
 117                 nr = (const struct nfrec *)&nh[1];
 118                 snaplen -= 24;
 119         } else {
 120                 nr = (const struct nfrec *)&nh->sequence;
 121                 snaplen -= 16;
 122         }
 123
 124         printf("%2u recs", nrecs);
 125
 126         for (; nrecs-- && (const u_char *)(nr + 1) <= snapend; nr++) {
 127                 char buf[20];
 128                 char asbuf[20];
 129
 130                 printf("\n  started %u.%03u, last %u.%03u",
 131                        EXTRACT_32BITS(&nr->start_time)/1000,
 132                        EXTRACT_32BITS(&nr->start_time)%1000,
 133                        EXTRACT_32BITS(&nr->last_time)/1000,
 134                        EXTRACT_32BITS(&nr->last_time)%1000);
 135
 136                 asbuf[0] = buf[0] = '\0';
 137                 if (ver == 5 || ver == 6) {
 138                         snprintf(buf, sizeof(buf), "/%u",
 139                                  (EXTRACT_32BITS(&nr->masks) >> 24) & 0xff);
 140                         snprintf(asbuf, sizeof(asbuf), ":%u",
 141                                  (EXTRACT_32BITS(&nr->asses) >> 16) & 0xffff);
 142                 }
 143                 printf("\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
 144                         EXTRACT_32BITS(&nr->ports) >> 16);
 145
 146                 if (ver == 5 || ver ==6) {
 147                         snprintf(buf, sizeof(buf), "/%d",
 148                                  (EXTRACT_32BITS(&nr->masks) >> 16) & 0xff);
 149                         snprintf(asbuf, sizeof(asbuf), ":%u",
 150                                  EXTRACT_32BITS(&nr->asses) & 0xffff);
 151                 }
 152                 printf("> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
 153                         EXTRACT_32BITS(&nr->ports) & 0xffff);
 154
 155                 printf(">> %s\n    ", intoa(nr->nhop_ina.s_addr));
 156
 157                 pent = getprotobynumber((EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff);
 158                 if (!pent || nflag)
 159                         printf("%u ",
 160                                (EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff);
 161                 else
 162                         printf("%s ", pent->p_name);
 163
 164                 /* tcp flags for tcp only */
 165                 if (pent && pent->p_proto == IPPROTO_TCP) {
 166                         int flags;
 167                         if (ver == 1)
 168                                 flags = (EXTRACT_32BITS(&nr->asses) >> 24) & 0xff;
 169                         else
 170                                 flags = (EXTRACT_32BITS(&nr->proto_tos) >> 16) & 0xff;
 171                         if (flags & TH_FIN)     putchar('F');
 172                         if (flags & TH_SYN)     putchar('S');
 173                         if (flags & TH_RST)     putchar('R');
 174                         if (flags & TH_PUSH)    putchar('P');
 175                         if (flags & TH_ACK)     putchar('A');
 176                         if (flags & TH_URG)     putchar('U');
 177                         if (flags)
 178                                 putchar(' ');
 179                 }
 180
 181                 buf[0]='\0';
 182                 if (ver == 6) {
 183                         snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
 184                                  (EXTRACT_32BITS(&nr->masks) >> 8) & 0xff,
 185                                  (EXTRACT_32BITS(&nr->masks)) & 0xff);
 186                 }
 187                 printf("tos %u, %u (%u octets) %s",
 188                        EXTRACT_32BITS(&nr->proto_tos) & 0xff,
 189                        EXTRACT_32BITS(&nr->packets),
 190                        EXTRACT_32BITS(&nr->octets), buf);
 191         }
 192 }