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 #ifdef HAVE_CONFIG_H
  36 #include "config.h"
  37 #endif
  38
  39 #include <tcpdump-stdinc.h>
  40
  41 #include <stdio.h>
  42 #include <string.h>
  43
  44 #include "interface.h"
  45 #include "addrtoname.h"
  46 #include "extract.h"
  47
  48 #include "tcp.h"
  49 #include "ipproto.h"
  50
  51 struct nfhdr {
  52         u_int32_t       ver_cnt;        /* version [15], and # of records */
  53         u_int32_t       msys_uptime;
  54         u_int32_t       utc_sec;
  55         u_int32_t       utc_nsec;
  56         u_int32_t       sequence;       /* v5 flow sequence number */
  57         u_int32_t       reserved;       /* v5 only */
  58 };
  59
  60 struct nfrec {
  61         struct in_addr  src_ina;
  62         struct in_addr  dst_ina;
  63         struct in_addr  nhop_ina;
  64         u_int32_t       ifaces;         /* src,dst ifaces */
  65         u_int32_t       packets;
  66         u_int32_t       octets;
  67         u_int32_t       start_time;     /* sys_uptime value */
  68         u_int32_t       last_time;      /* sys_uptime value */
  69         u_int32_t       ports;          /* src,dst ports */
  70         u_int32_t       proto_tos;      /* proto, tos, pad, flags(v5) */
  71         u_int32_t       asses;          /* v1: flags; v5: src,dst AS */
  72         u_int32_t       masks;          /* src,dst addr prefix; v6: encaps */
  73         struct in_addr  peer_nexthop;   /* v6: IP address of the nexthop within the peer (FIB)*/
  74 };
  75
  76 void
  77 cnfp_print(const u_char *cp, const u_char *bp _U_)
  78 {
  79         register const struct nfhdr *nh;
  80         register const struct nfrec *nr;
  81         struct protoent *pent;
  82         int nrecs, ver;
  83 #if 0
  84         time_t t;
  85 #endif
  86
  87         nh = (const struct nfhdr *)cp;
  88
  89         if ((const u_char *)(nh + 1) > snapend)
  90                 return;
  91
  92         nrecs = EXTRACT_32BITS(&nh->ver_cnt) & 0xffff;
  93         ver = (EXTRACT_32BITS(&nh->ver_cnt) & 0xffff0000) >> 16;
  94 #if 0
  95         /*
  96          * This is seconds since the UN*X epoch, and is followed by
  97          * nanoseconds.  XXX - format it, rather than just dumping the
  98          * raw seconds-since-the-Epoch.
  99          */
 100         t = EXTRACT_32BITS(&nh->utc_sec);
 101 #endif
 102
 103         printf("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 104                EXTRACT_32BITS(&nh->msys_uptime)/1000,
 105                EXTRACT_32BITS(&nh->msys_uptime)%1000,
 106                EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec));
 107
 108         if (ver == 5 || ver == 6) {
 109                 printf("#%u, ", EXTRACT_32BITS(&nh->sequence));
 110                 nr = (const struct nfrec *)&nh[1];
 111                 snaplen -= 24;
 112         } else {
 113                 nr = (const struct nfrec *)&nh->sequence;
 114                 snaplen -= 16;
 115         }
 116
 117         printf("%2u recs", nrecs);
 118
 119         for (; nrecs-- && (const u_char *)(nr + 1) <= snapend; nr++) {
 120                 char buf[20];
 121                 char asbuf[20];
 122
 123                 printf("\n  started %u.%03u, last %u.%03u",
 124                        EXTRACT_32BITS(&nr->start_time)/1000,
 125                        EXTRACT_32BITS(&nr->start_time)%1000,
 126                        EXTRACT_32BITS(&nr->last_time)/1000,
 127                        EXTRACT_32BITS(&nr->last_time)%1000);
 128
 129                 asbuf[0] = buf[0] = '\0';
 130                 if (ver == 5 || ver == 6) {
 131                         snprintf(buf, sizeof(buf), "/%u",
 132                                  (EXTRACT_32BITS(&nr->masks) >> 24) & 0xff);
 133                         snprintf(asbuf, sizeof(asbuf), ":%u",
 134                                  (EXTRACT_32BITS(&nr->asses) >> 16) & 0xffff);
 135                 }
 136                 printf("\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
 137                         EXTRACT_32BITS(&nr->ports) >> 16);
 138
 139                 if (ver == 5 || ver ==6) {
 140                         snprintf(buf, sizeof(buf), "/%d",
 141                                  (EXTRACT_32BITS(&nr->masks) >> 16) & 0xff);
 142                         snprintf(asbuf, sizeof(asbuf), ":%u",
 143                                  EXTRACT_32BITS(&nr->asses) & 0xffff);
 144                 }
 145                 printf("> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
 146                         EXTRACT_32BITS(&nr->ports) & 0xffff);
 147
 148                 printf(">> %s\n    ", intoa(nr->nhop_ina.s_addr));
 149
 150                 pent = getprotobynumber((EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff);
 151                 if (!pent || nflag)
 152                         printf("%u ",
 153                                (EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff);
 154                 else
 155                         printf("%s ", pent->p_name);
 156
 157                 /* tcp flags for tcp only */
 158                 if (pent && pent->p_proto == IPPROTO_TCP) {
 159                         int flags;
 160                         if (ver == 1)
 161                                 flags = (EXTRACT_32BITS(&nr->asses) >> 24) & 0xff;
 162                         else
 163                                 flags = (EXTRACT_32BITS(&nr->proto_tos) >> 16) & 0xff;
 164                         if (flags & TH_FIN)     putchar('F');
 165                         if (flags & TH_SYN)     putchar('S');
 166                         if (flags & TH_RST)     putchar('R');
 167                         if (flags & TH_PUSH)    putchar('P');
 168                         if (flags & TH_ACK)     putchar('A');
 169                         if (flags & TH_URG)     putchar('U');
 170                         if (flags)
 171                                 putchar(' ');
 172                 }
 173
 174                 buf[0]='\0';
 175                 if (ver == 6) {
 176                         snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
 177                                  (EXTRACT_32BITS(&nr->masks) >> 8) & 0xff,
 178                                  (EXTRACT_32BITS(&nr->masks)) & 0xff);
 179                 }
 180                 printf("tos %u, %u (%u octets) %s",
 181                        EXTRACT_32BITS(&nr->proto_tos) & 0xff,
 182                        EXTRACT_32BITS(&nr->packets),
 183                        EXTRACT_32BITS(&nr->octets), buf);
 184         }
 185 }