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 #ifndef lint
  36 static const char rcsid[] =
  37     "@(#) $Header: /tcpdump/master/tcpdump/print-cnfp.c,v 1.5 2000-05-15 00:37:34 assar Exp $";
  38 #endif
  39
  40 #ifdef HAVE_CONFIG_H
  41 #include "config.h"
  42 #endif
  43
  44 #include <sys/types.h>
  45 #include <sys/time.h>
  46 #include <sys/socket.h>
  47 #include <netdb.h>
  48
  49 #include <netinet/in.h>
  50 #include <netinet/tcp.h>
  51
  52 #include <arpa/inet.h>
  53
  54 #include <stdio.h>
  55 #include <string.h>
  56
  57 #include "interface.h"
  58
  59 struct nfhdr {
  60         u_int32_t       ver_cnt;        /* version [15], and # of records */
  61         u_int32_t       msys_uptime;
  62         u_int32_t       utc_sec;
  63         u_int32_t       utc_nsec;
  64         u_int32_t       sequence;       /* v5 flow sequence number */
  65         u_int32_t       reserved;       /* v5 only */
  66 };
  67
  68 struct nfrec {
  69         struct in_addr  src_ina;
  70         struct in_addr  dst_ina;
  71         struct in_addr  nhop_ina;
  72         u_int32_t       ifaces;         /* src,dst ifaces */
  73         u_int32_t       packets;
  74         u_int32_t       octets;
  75         u_int32_t       start_time;     /* sys_uptime value */
  76         u_int32_t       last_time;      /* sys_uptime value */
  77         u_int32_t       ports;          /* src,dst ports */
  78         u_int32_t       proto_tos;      /* proto, tos, pad, flags(v5) */
  79         u_int32_t       asses;          /* v1: flags; v5: src,dst AS */
  80         u_int32_t       masks;          /* src,dst addr prefix */
  81
  82 };
  83
  84 void
  85 cnfp_print(const u_char *cp, u_int len, const u_char *bp)
  86 {
  87         register const struct nfhdr *nh;
  88         register const struct nfrec *nr;
  89         register const struct ip *ip;
  90         struct protoent *pent;
  91         int nrecs, ver;
  92         time_t t;
  93
  94         ip = (struct ip *)bp;
  95         nh = (struct nfhdr *)cp;
  96
  97         if ((u_char *)(nh + 1) > snapend)
  98                 return;
  99
 100         nrecs = ntohl(nh->ver_cnt) & 0xffff;
 101         ver = (ntohl(nh->ver_cnt) & 0xffff0000) >> 16;
 102         t = ntohl(nh->utc_sec);
 103 /*      (p = ctime(&t))[24] = '\0'; */
 104
 105         printf("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
 106                (unsigned)ntohl(nh->msys_uptime)/1000,
 107                (unsigned)ntohl(nh->msys_uptime)%1000,
 108                (unsigned)ntohl(nh->utc_sec), (unsigned)ntohl(nh->utc_nsec));
 109
 110         if (ver == 5) {
 111                 printf("#%u, ", (unsigned)htonl(nh->sequence));
 112                 nr = (struct nfrec *)&nh[1];
 113                 snaplen -= 24;
 114         } else {
 115                 nr = (struct nfrec *)&nh->sequence;
 116                 snaplen -= 16;
 117         }
 118
 119         printf("%2u recs", nrecs);
 120
 121         for (; nrecs-- && (u_char *)(nr + 1) <= snapend; nr++) {
 122                 char buf[20];
 123                 char asbuf[20];
 124
 125                 printf("\n  started %u.%03u, last %u.%03u",
 126                        (unsigned)ntohl(nr->start_time)/1000,
 127                        (unsigned)ntohl(nr->start_time)%1000,
 128                        (unsigned)ntohl(nr->last_time)/1000,
 129                        (unsigned)ntohl(nr->last_time)%1000);
 130
 131                 asbuf[0] = buf[0] = '\0';
 132                 if (ver == 5) {
 133                         snprintf(buf, sizeof(buf), "/%u",
 134                                  (unsigned)(ntohl(nr->masks) >> 24) & 0xff);
 135                         snprintf(asbuf, sizeof(asbuf), "%u:",
 136                                  (unsigned)(ntohl(nr->asses) >> 16) & 0xffff);
 137                 }
 138                 printf("\n    %s%s%s:%u ", inet_ntoa(nr->src_ina), buf, asbuf,
 139                         (unsigned)ntohl(nr->ports) >> 16);
 140
 141                 if (ver == 5) {
 142                         snprintf(buf, sizeof(buf), "/%d",
 143                                  (unsigned)(ntohl(nr->masks) >> 16) & 0xff);
 144                         snprintf(asbuf, sizeof(asbuf), "%u:",
 145                                  (unsigned)ntohl(nr->asses) & 0xffff);
 146                 }
 147                 printf("> %s%s%s:%u ", inet_ntoa(nr->dst_ina), buf, asbuf,
 148                         (unsigned)ntohl(nr->ports) & 0xffff);
 149
 150                 printf(">> %s\n    ", inet_ntoa(nr->nhop_ina));
 151
 152                 pent = getprotobynumber((ntohl(nr->proto_tos) >> 8) & 0xff);
 153                 if (!pent || nflag)
 154                         printf("%u ",
 155                                (unsigned)(ntohl(nr->proto_tos) >> 8) & 0xff);
 156                 else
 157                         printf("%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 = (ntohl(nr->asses) >> 24) & 0xff;
 164                         else
 165                                 flags = (ntohl(nr->proto_tos) >> 16) & 0xff;
 166                         if (flags & TH_FIN)     putchar('F');
 167                         if (flags & TH_SYN)     putchar('S');
 168                         if (flags & TH_RST)     putchar('R');
 169                         if (flags & TH_PUSH)    putchar('P');
 170                         if (flags & TH_ACK)     putchar('A');
 171                         if (flags & TH_URG)     putchar('U');
 172                         if (flags)
 173                                 putchar(' ');
 174                 }
 175                 printf("tos %u, %u (%u octets)",
 176                        (unsigned)ntohl(nr->proto_tos) & 0xff,
 177                        (unsigned)ntohl(nr->packets),
 178                        (unsigned)ntohl(nr->octets));
 179         }
 180 }