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 #include <sys/types.h>
  36 #include <sys/time.h>
  37 #include <sys/socket.h>
  38 #include <netdb.h>
  39
  40 #include <netinet/in.h>
  41 #include <netinet/tcp.h>
  42
  43 #include <stdio.h>
  44 #include <string.h>
  45
  46 #include "interface.h"
  47
  48 struct nfhdr {
  49         u_int32_t       ver_cnt;        /* version [15], and # of records */
  50         u_int32_t       msys_uptime;
  51         u_int32_t       utc_sec;
  52         u_int32_t       utc_nsec;
  53         u_int32_t       sequence;       /* v5 flow sequence number */
  54         u_int32_t       reserved;       /* v5 only */
  55 };
  56
  57 struct nfrec {
  58         in_addr_t       src_ina;
  59         in_addr_t       dst_ina;
  60         in_addr_t       nhop_ina;
  61         u_int32_t       ifaces;         /* src,dst ifaces */
  62         u_int32_t       packets;
  63         u_int32_t       octets;
  64         u_int32_t       start_time;     /* sys_uptime value */
  65         u_int32_t       last_time;      /* sys_uptime value */
  66         u_int32_t       ports;          /* src,dst ports */
  67         u_int32_t       proto_tos;      /* proto, tos, pad, flags(v5) */
  68         u_int32_t       asses;          /* v1: flags; v5: src,dst AS */
  69         u_int32_t       masks;          /* src,dst addr prefix */
  70
  71 };
  72
  73 void
  74 cnfp_print(const u_char *cp, u_int len, const u_char *bp)
  75 {
  76         register const struct nfhdr *nh;
  77         register const struct nfrec *nr;
  78         register const struct ip *ip;
  79         struct protoent *pent;
  80         int nrecs, ver;
  81         time_t t;
  82         char *p;
  83
  84         ip = (struct ip *)bp;
  85         nh = (struct nfhdr *)cp;
  86
  87         if ((u_char *)(nh + 1) > snapend)
  88                 return;
  89
  90         nrecs = ntohl(nh->ver_cnt) & 0xffff;
  91         ver = (ntohl(nh->ver_cnt) & 0xffff0000) >> 16;
  92         t = ntohl(nh->utc_sec);
  93 /*      (p = ctime(&t))[24] = '\0'; */
  94
  95         printf("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
  96                ntohl(nh->msys_uptime)/1000, ntohl(nh->msys_uptime)%1000,
  97                ntohl(nh->utc_sec), ntohl(nh->utc_nsec));
  98
  99         if (ver == 5) {
 100                 printf("#%u, ", htonl(nh->sequence));
 101                 nr = (struct nfrec *)&nh[1];
 102                 snaplen -= 24;
 103         } else {
 104                 nr = (struct nfrec *)&nh->sequence;
 105                 snaplen -= 16;
 106         }
 107
 108         printf("%2u recs", nrecs);
 109
 110         for (; nrecs-- && (u_char *)(nr + 1) <= snapend; nr++) {
 111                 char buf[5];
 112                 char asbuf[7];
 113
 114                 printf("\n  started %u.%03u, last %u.%03u",
 115                         ntohl(nr->start_time)/1000, ntohl(nr->start_time)%1000,
 116                         ntohl(nr->last_time)/1000, ntohl(nr->last_time)%1000);
 117
 118                 asbuf[0] = buf[0] = '\0';
 119                 if (ver == 5) {
 120                         sprintf(buf, "/%d", (ntohl(nr->masks) >> 24) & 0xff);
 121                         sprintf(asbuf, "%d:", (ntohl(nr->asses) >> 16) & 0xffff);
 122                 }
 123                 printf("\n    %s%s%s:%u ", inet_ntoa(nr->src_ina), buf, asbuf,
 124                         ntohl(nr->ports) >> 16);
 125
 126                 if (ver == 5) {
 127                         sprintf(buf, "/%d", (ntohl(nr->masks) >> 16) & 0xff);
 128                         sprintf(asbuf, "%d:", ntohl(nr->asses) & 0xffff);
 129                 }
 130                 printf("> %s%s%s:%u ", inet_ntoa(nr->dst_ina), buf, asbuf,
 131                         ntohl(nr->ports) & 0xffff);
 132
 133                 printf(">> %s\n    ", inet_ntoa(nr->nhop_ina));
 134
 135                 pent = getprotobynumber((ntohl(nr->proto_tos) >> 8) & 0xff);
 136                 if (!pent || nflag)
 137                         printf("%u ", (ntohl(nr->proto_tos) >> 8) & 0xff);
 138                 else
 139                         printf("%s ", pent->p_name);
 140
 141                 /* tcp flags for tcp only */
 142                 if (pent && pent->p_proto == IPPROTO_TCP) {
 143                         int flags;
 144                         if (ver == 1)
 145                                 flags = (ntohl(nr->asses) >> 24) & 0xff;
 146                         else
 147                                 flags = (ntohl(nr->proto_tos) >> 16) & 0xff;
 148                         if (flags & TH_FIN)     putchar('F');
 149                         if (flags & TH_SYN)     putchar('S');
 150                         if (flags & TH_RST)     putchar('R');
 151                         if (flags & TH_PUSH)    putchar('P');
 152                         if (flags & TH_ACK)     putchar('A');
 153                         if (flags & TH_URG)     putchar('U');
 154                         if (flags)
 155                                 putchar(' ');
 156                 }
 157                 printf("tos %u, %u (%u octets)", ntohl(nr->proto_tos) & 0xff,
 158                         ntohl(nr->packets), ntohl(nr->octets));
 159
 160
 161         }
 162
 163 }
 164