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 /* Cisco NetFlow protocol */
  34
  35 #define NETDISSECT_REWORKED
  36 #ifdef HAVE_CONFIG_H
  37 #include "config.h"
  38 #endif
  39
  40 #include <tcpdump-stdinc.h>
  41
  42 #include <stdio.h>
  43 #include <string.h>
  44
  45 #include "interface.h"
  46 #include "addrtoname.h"
  47 #include "extract.h"
  48
  49 #include "tcp.h"
  50 #include "ipproto.h"
  51
  52 struct nfhdr {
  53         uint32_t        ver_cnt;        /* version [15], and # of records */
  54         uint32_t        msys_uptime;
  55         uint32_t        utc_sec;
  56         uint32_t        utc_nsec;
  57         uint32_t        sequence;       /* v5 flow sequence number */
  58         uint32_t        reserved;       /* v5 only */
  59 };
  60
  61 struct nfrec {
  62         struct in_addr  src_ina;
  63         struct in_addr  dst_ina;
  64         struct in_addr  nhop_ina;
  65         uint32_t        ifaces;         /* src,dst ifaces */
  66         uint32_t        packets;
  67         uint32_t        octets;
  68         uint32_t        start_time;     /* sys_uptime value */
  69         uint32_t        last_time;      /* sys_uptime value */
  70         uint32_t        ports;          /* src,dst ports */
  71         uint32_t        proto_tos;      /* proto, tos, pad, flags(v5) */
  72         uint32_t        asses;          /* v1: flags; v5: src,dst AS */
  73         uint32_t        masks;          /* src,dst addr prefix; v6: encaps */
  74         struct in_addr  peer_nexthop;   /* v6: IP address of the nexthop within the peer (FIB)*/
  75 };
  76
  77 void
  78 cnfp_print(netdissect_options *ndo,
  79            const u_char *cp, const u_char *bp _U_)
  80 {
  81         register const struct nfhdr *nh;
  82         register const struct nfrec *nr;
  83         struct protoent *pent;
  84         int nrecs, ver;
  85 #if 0
  86         time_t t;
  87 #endif
  88
  89         nh = (const struct nfhdr *)cp;
  90
  91         if ((const u_char *)(nh + 1) > ndo->ndo_snapend)
  92                 return;
  93
  94         nrecs = EXTRACT_32BITS(&nh->ver_cnt) & 0xffff;
  95         ver = (EXTRACT_32BITS(&nh->ver_cnt) & 0xffff0000) >> 16;
  96 #if 0
  97         /*
  98          * This is seconds since the UN*X epoch, and is followed by
  99          * nanoseconds.  XXX - format it, rather than just dumping the
 100          * raw seconds-since-the-Epoch.
 101          */
 102         t = EXTRACT_32BITS(&nh->utc_sec);
 103 #endif
 104
 105         ND_PRINT((ndo, "NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 106                EXTRACT_32BITS(&nh->msys_uptime)/1000,
 107                EXTRACT_32BITS(&nh->msys_uptime)%1000,
 108                EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec)));
 109
 110         if (ver == 5 || ver == 6) {
 111                 ND_PRINT((ndo, "#%u, ", EXTRACT_32BITS(&nh->sequence)));
 112                 nr = (const struct nfrec *)&nh[1];
 113                 ndo->ndo_snaplen -= 24;
 114         } else {
 115                 nr = (const struct nfrec *)&nh->sequence;
 116                 ndo->ndo_snaplen -= 16;
 117         }
 118
 119         ND_PRINT((ndo, "%2u recs", nrecs));
 120
 121         for (; nrecs-- && (const u_char *)(nr + 1) <= ndo->ndo_snapend; nr++) {
 122                 char buf[20];
 123                 char asbuf[20];
 124
 125                 ND_PRINT((ndo, "\n  started %u.%03u, last %u.%03u",
 126                        EXTRACT_32BITS(&nr->start_time)/1000,
 127                        EXTRACT_32BITS(&nr->start_time)%1000,
 128                        EXTRACT_32BITS(&nr->last_time)/1000,
 129                        EXTRACT_32BITS(&nr->last_time)%1000));
 130
 131                 asbuf[0] = buf[0] = '\0';
 132                 if (ver == 5 || ver == 6) {
 133                         snprintf(buf, sizeof(buf), "/%u",
 134                                  (EXTRACT_32BITS(&nr->masks) >> 24) & 0xff);
 135                         snprintf(asbuf, sizeof(asbuf), ":%u",
 136                                  (EXTRACT_32BITS(&nr->asses) >> 16) & 0xffff);
 137                 }
 138                 ND_PRINT((ndo, "\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
 139                         EXTRACT_32BITS(&nr->ports) >> 16));
 140
 141                 if (ver == 5 || ver ==6) {
 142                         snprintf(buf, sizeof(buf), "/%d",
 143                                  (EXTRACT_32BITS(&nr->masks) >> 16) & 0xff);
 144                         snprintf(asbuf, sizeof(asbuf), ":%u",
 145                                  EXTRACT_32BITS(&nr->asses) & 0xffff);
 146                 }
 147                 ND_PRINT((ndo, "> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
 148                         EXTRACT_32BITS(&nr->ports) & 0xffff));
 149
 150                 ND_PRINT((ndo, ">> %s\n    ", intoa(nr->nhop_ina.s_addr)));
 151
 152                 pent = getprotobynumber((EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff);
 153                 if (!pent || ndo->ndo_nflag)
 154                         ND_PRINT((ndo, "%u ",
 155                                (EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff));
 156                 else
 157                         ND_PRINT((ndo, "%s ", pent->p_name));
 158
 159                 /* tcp flags for tcp only */
 160                 if (pent && pent->p_proto == IPPROTO_TCP) {
 161                         int flags;
 162                         if (ver == 1)
 163                                 flags = (EXTRACT_32BITS(&nr->asses) >> 24) & 0xff;
 164                         else
 165                                 flags = (EXTRACT_32BITS(&nr->proto_tos) >> 16) & 0xff;
 166                         ND_PRINT((ndo, "%s%s%s%s%s%s%s",
 167                                 flags & TH_FIN  ? "F" : "",
 168                                 flags & TH_SYN  ? "S" : "",
 169                                 flags & TH_RST  ? "R" : "",
 170                                 flags & TH_PUSH ? "P" : "",
 171                                 flags & TH_ACK  ? "A" : "",
 172                                 flags & TH_URG  ? "U" : "",
 173                                 flags           ? " " : ""));
 174                 }
 175
 176                 buf[0]='\0';
 177                 if (ver == 6) {
 178                         snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
 179                                  (EXTRACT_32BITS(&nr->masks) >> 8) & 0xff,
 180                                  (EXTRACT_32BITS(&nr->masks)) & 0xff);
 181                 }
 182                 ND_PRINT((ndo, "tos %u, %u (%u octets) %s",
 183                        EXTRACT_32BITS(&nr->proto_tos) & 0xff,
 184                        EXTRACT_32BITS(&nr->packets),
 185                        EXTRACT_32BITS(&nr->octets), buf));
 186         }
 187 }