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print-cnfp.c

/*    $OpenBSD: print-cnfp.c,v 1.2 1998/06/25 20:26:59 mickey Exp $     */

/*
 * Copyright (c) 1998 Michael Shalayeff
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    This product includes software developed by Michael Shalayeff.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/* Cisco NetFlow protocol */

#ifndef lint
static const char rcsid[] _U_ =
    "@(#) $Header: /tcpdump/master/tcpdump/print-cnfp.c,v 1.14.2.2 2003/11/16 08:51:15 guy Exp $";
#endif

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <tcpdump-stdinc.h>

#include <stdio.h>
#include <string.h>

#include "interface.h"
#include "addrtoname.h"
#include "extract.h"

#include "tcp.h"
#include "ipproto.h"

struct nfhdr {
      u_int32_t   ver_cnt;    /* version [15], and # of records */
      u_int32_t   msys_uptime;
      u_int32_t   utc_sec;
      u_int32_t   utc_nsec;
      u_int32_t   sequence;   /* v5 flow sequence number */
      u_int32_t   reserved;   /* v5 only */
};

struct nfrec {
      struct in_addr    src_ina;
      struct in_addr    dst_ina;
      struct in_addr    nhop_ina;
      u_int32_t   ifaces;           /* src,dst ifaces */
      u_int32_t   packets;
      u_int32_t   octets;
      u_int32_t   start_time; /* sys_uptime value */
      u_int32_t   last_time;  /* sys_uptime value */
      u_int32_t   ports;            /* src,dst ports */
      u_int32_t   proto_tos;  /* proto, tos, pad, flags(v5) */
      u_int32_t   asses;            /* v1: flags; v5: src,dst AS */
      u_int32_t   masks;            /* src,dst addr prefix; v6: encaps */
      struct in_addr    peer_nexthop;     /* v6: IP address of the nexthop within the peer (FIB)*/
};

void
cnfp_print(const u_char *cp, const u_char *bp)
{
      register const struct nfhdr *nh;
      register const struct nfrec *nr;
      register const struct ip *ip;
      struct protoent *pent;
      int nrecs, ver;
      time_t t;

      ip = (const struct ip *)bp;
      nh = (const struct nfhdr *)cp;

      if ((const u_char *)(nh + 1) > snapend)
            return;

      nrecs = EXTRACT_32BITS(&nh->ver_cnt) & 0xffff;
      ver = (EXTRACT_32BITS(&nh->ver_cnt) & 0xffff0000) >> 16;
      t = EXTRACT_32BITS(&nh->utc_sec);
/*    (p = ctime(&t))[24] = '\0'; */

      printf("NetFlow v%x, %u.%03u uptime, %u.%09u, ", ver,
             EXTRACT_32BITS(&nh->msys_uptime)/1000,
             EXTRACT_32BITS(&nh->msys_uptime)%1000,
             EXTRACT_32BITS(&nh->utc_sec), EXTRACT_32BITS(&nh->utc_nsec));

      if (ver == 5 || ver == 6) {
            printf("#%u, ", EXTRACT_32BITS(&nh->sequence));
            nr = (const struct nfrec *)&nh[1];
            snaplen -= 24;
      } else {
            nr = (const struct nfrec *)&nh->sequence;
            snaplen -= 16;
      }

      printf("%2u recs", nrecs);

      for (; nrecs-- && (const u_char *)(nr + 1) <= snapend; nr++) {
            char buf[20];
            char asbuf[20];

            printf("\n  started %u.%03u, last %u.%03u",
                   EXTRACT_32BITS(&nr->start_time)/1000,
                   EXTRACT_32BITS(&nr->start_time)%1000,
                   EXTRACT_32BITS(&nr->last_time)/1000,
                   EXTRACT_32BITS(&nr->last_time)%1000);

            asbuf[0] = buf[0] = '\0';
            if (ver == 5 || ver == 6) {
                  snprintf(buf, sizeof(buf), "/%u",
                         (EXTRACT_32BITS(&nr->masks) >> 24) & 0xff);
                  snprintf(asbuf, sizeof(asbuf), ":%u",
                         (EXTRACT_32BITS(&nr->asses) >> 16) & 0xffff);
            }
            printf("\n    %s%s%s:%u ", intoa(nr->src_ina.s_addr), buf, asbuf,
                  EXTRACT_32BITS(&nr->ports) >> 16);

            if (ver == 5 || ver ==6) {
                  snprintf(buf, sizeof(buf), "/%d",
                         (EXTRACT_32BITS(&nr->masks) >> 16) & 0xff);
                  snprintf(asbuf, sizeof(asbuf), ":%u",
                         EXTRACT_32BITS(&nr->asses) & 0xffff);
            }
            printf("> %s%s%s:%u ", intoa(nr->dst_ina.s_addr), buf, asbuf,
                  EXTRACT_32BITS(&nr->ports) & 0xffff);

            printf(">> %s\n    ", intoa(nr->nhop_ina.s_addr));

            pent = getprotobynumber((EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff);
            if (!pent || nflag)
                  printf("%u ",
                         (EXTRACT_32BITS(&nr->proto_tos) >> 8) & 0xff);
            else
                  printf("%s ", pent->p_name);

            /* tcp flags for tcp only */
            if (pent && pent->p_proto == IPPROTO_TCP) {
                  int flags;
                  if (ver == 1)
                        flags = (EXTRACT_32BITS(&nr->asses) >> 24) & 0xff;
                  else
                        flags = (EXTRACT_32BITS(&nr->proto_tos) >> 16) & 0xff;
                  if (flags & TH_FIN)     putchar('F');
                  if (flags & TH_SYN)     putchar('S');
                  if (flags & TH_RST)     putchar('R');
                  if (flags & TH_PUSH)    putchar('P');
                  if (flags & TH_ACK)     putchar('A');
                  if (flags & TH_URG)     putchar('U');
                  if (flags)
                        putchar(' ');
            }

            buf[0]='\0';
            if (ver == 6) {
                  snprintf(buf, sizeof(buf), "(%u<>%u encaps)",
                         (EXTRACT_32BITS(&nr->masks) >> 8) & 0xff,
                         (EXTRACT_32BITS(&nr->masks)) & 0xff);
            }
            printf("tos %u, %u (%u octets) %s",
                   EXTRACT_32BITS(&nr->proto_tos) & 0xff,
                   EXTRACT_32BITS(&nr->packets),
                   EXTRACT_32BITS(&nr->octets), buf);
      }
}

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