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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 /* Cisco NetFlow protocol */
  34
  35 #ifndef lint
  36 static const char rcsid[] =
  37     "@(#) $Header: /tcpdump/master/tcpdump/print-cnfp.c,v 1.13 2002-12-11 07:13:58 guy Exp $";
  38 #endif
  39
  40 #ifdef HAVE_CONFIG_H
  41 #include "config.h"
  42 #endif
  43
  44 #include <tcpdump-stdinc.h>
  45
  46 #include <stdio.h>
  47 #include <string.h>
  48
  49 #include "interface.h"
  50 #include "addrtoname.h"
  51 #include "extract.h"
  52
  53 #include "tcp.h"
  54
  55 struct nfhdr {
  56         u_int32_t       ver_cnt;        /* version [15], and # of records */
  57         u_int32_t       msys_uptime;
  58         u_int32_t       utc_sec;
  59         u_int32_t       utc_nsec;
  60         u_int32_t       sequence;       /* v5 flow sequence number */
  61         u_int32_t       reserved;       /* v5 only */
  62 };
  63
  64 struct nfrec {
  65         struct in_addr  src_ina;
  66         struct in_addr  dst_ina;
  67         struct in_addr  nhop_ina;
  68         u_int32_t       ifaces;         /* src,dst ifaces */
  69         u_int32_t       packets;
  70         u_int32_t       octets;
  71         u_int32_t       start_time;     /* sys_uptime value */
  72         u_int32_t       last_time;      /* sys_uptime value */
  73         u_int32_t       ports;          /* src,dst ports */
  74         u_int32_t       proto_tos;      /* proto, tos, pad, flags(v5) */
  75         u_int32_t       asses;          /* v1: flags; v5: src,dst AS */
  76         u_int32_t       masks;          /* src,dst addr prefix; v6: encaps */
  77         struct in_addr  peer_nexthop;   /* v6: IP address of the nexthop within the peer (FIB)*/
  78 };
  79
  80 void
  81 cnfp_print(const u_char *cp, const u_char *bp)
  82 {
  83         register const struct nfhdr *nh;
  84         register const struct nfrec *nr;
  85         register const struct ip *ip;
  86         struct protoent *pent;
  87         int nrecs, ver;
  88         time_t t;
  89
  90         ip = (const struct ip *)bp;
  91         nh = (const struct nfhdr *)cp;
  92
  93         if ((const u_char *)(nh + 1) > snapend)
  94                 return;
  95
  96         nrecs = EXTRACT_32BITS(&nh->ver_cnt) & 0xffff;
  97         ver = (EXTRACT_32BITS(&nh->ver_cnt) & 0xffff0000) >> 16;
  98         t = EXTRACT_32BITS(&nh->utc_sec);
  99 /*      (p = ctime(&t))[24] = '\0'; */
 100
 101         printf("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 102                EXTRACT_32BITS(&nh->msys_uptime)/1000,
 103                EXTRACT_32BITS(&nh->msys_uptime)%1000,
 104                EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec));
 105
 106         if (ver == 5 || ver == 6) {
 107                 printf("#%u, ", EXTRACT_32BITS(&nh->sequence));
 108                 nr = (const struct nfrec *)&nh[1];
 109                 snaplen -= 24;
 110         } else {
 111                 nr = (const struct nfrec *)&nh->sequence;
 112                 snaplen -= 16;
 113         }
 114
 115         printf("%2u recs", nrecs);
 116
 117         for (; nrecs-- && (const u_char *)(nr + 1) <= snapend; nr++) {
 118                 char buf[20];
 119                 char asbuf[20];
 120
 121                 printf("\n  started %u.%03u, last %u.%03u",
 122                        EXTRACT_32BITS(&nr->start_time)/1000,
 123                        EXTRACT_32BITS(&nr->start_time)%1000,
 124                        EXTRACT_32BITS(&nr->last_time)/1000,
 125                        EXTRACT_32BITS(&nr->last_time)%1000);
 126
 127                 asbuf[0] = buf[0] = '\0';
 128                 if (ver == 5 || ver == 6) {
 129                         snprintf(buf, sizeof(buf), "/%u",
 130                                  (EXTRACT_32BITS(&nr->masks) >> 24) & 0xff);
 131                         snprintf(asbuf, sizeof(asbuf), ":%u",
 132                                  (EXTRACT_32BITS(&nr->asses) >> 16) & 0xffff);
 133                 }
 134                 printf("\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
 135                         EXTRACT_32BITS(&nr->ports) >> 16);
 136
 137                 if (ver == 5 || ver ==6) {
 138                         snprintf(buf, sizeof(buf), "/%d",
 139                                  (EXTRACT_32BITS(&nr->masks) >> 16) & 0xff);
 140                         snprintf(asbuf, sizeof(asbuf), ":%u",
 141                                  EXTRACT_32BITS(&nr->asses) & 0xffff);
 142                 }
 143                 printf("> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
 144                         EXTRACT_32BITS(&nr->ports) & 0xffff);
 145
 146                 printf(">> %s\n    ", intoa(nr->nhop_ina.s_addr));
 147
 148                 pent = getprotobynumber((EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff);
 149                 if (!pent || nflag)
 150                         printf("%u ",
 151                                (EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff);
 152                 else
 153                         printf("%s ", pent->p_name);
 154
 155                 /* tcp flags for tcp only */
 156                 if (pent && pent->p_proto == IPPROTO_TCP) {
 157                         int flags;
 158                         if (ver == 1)
 159                                 flags = (EXTRACT_32BITS(&nr->asses) >> 24) & 0xff;
 160                         else
 161                                 flags = (EXTRACT_32BITS(&nr->proto_tos) >> 16) & 0xff;
 162                         if (flags & TH_FIN)     putchar('F');
 163                         if (flags & TH_SYN)     putchar('S');
 164                         if (flags & TH_RST)     putchar('R');
 165                         if (flags & TH_PUSH)    putchar('P');
 166                         if (flags & TH_ACK)     putchar('A');
 167                         if (flags & TH_URG)     putchar('U');
 168                         if (flags)
 169                                 putchar(' ');
 170                 }
 171
 172                 buf[0]='\0';
 173                 if (ver == 6) {
 174                         snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
 175                                  (EXTRACT_32BITS(&nr->masks) >> 8) & 0xff,
 176                                  (EXTRACT_32BITS(&nr->masks)) & 0xff);
 177                 }
 178                 printf("tos %u, %u (%u octets) %s",
 179                        EXTRACT_32BITS(&nr->proto_tos) & 0xff,
 180                        EXTRACT_32BITS(&nr->packets),
 181                        EXTRACT_32BITS(&nr->octets), buf);
 182         }
 183 }