contrib/ipfilter/lib/printpacket6.c

   1 /*      $FreeBSD$       */
   2
   3 /*
   4  * Copyright (C) 2002 by Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  * $Id: printpacket6.c,v 1.3.4.1 2006/06/16 17:21:13 darrenr Exp $
   9  */
  10
  11 #include "ipf.h"
  12
  13 /*
  14  * This is meant to work without the IPv6 header files being present or
  15  * the inet_ntop() library.
  16  */
  17 void printpacket6(ip)
  18 struct ip *ip;
  19 {
  20         u_char *buf, p;
  21         u_short plen, *addrs;
  22         tcphdr_t *tcp;
  23         u_32_t flow;
  24
  25         buf = (u_char *)ip;
  26         tcp = (tcphdr_t *)(buf + 40);
  27         p = buf[6];
  28         flow = ntohl(*(u_32_t *)buf);
  29         flow &= 0xfffff;
  30         plen = ntohs(*((u_short *)buf +2));
  31         addrs = (u_short *)buf + 4;
  32
  33         printf("ip6/%d %d %#x %d", buf[0] & 0xf, plen, flow, p);
  34         printf(" %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
  35                 ntohs(addrs[0]), ntohs(addrs[1]), ntohs(addrs[2]),
  36                 ntohs(addrs[3]), ntohs(addrs[4]), ntohs(addrs[5]),
  37                 ntohs(addrs[6]), ntohs(addrs[7]));
  38         if (plen >= 4)
  39                 if (p == IPPROTO_TCP || p == IPPROTO_UDP)
  40                         (void)printf(",%d", ntohs(tcp->th_sport));
  41         printf(" >");
  42         addrs += 8;
  43         printf(" %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
  44                 ntohs(addrs[0]), ntohs(addrs[1]), ntohs(addrs[2]),
  45                 ntohs(addrs[3]), ntohs(addrs[4]), ntohs(addrs[5]),
  46                 ntohs(addrs[6]), ntohs(addrs[7]));
  47         if (plen >= 4)
  48                 if (p == IPPROTO_TCP || p == IPPROTO_UDP)
  49                         (void)printf(",%d", ntohs(tcp->th_dport));
  50         putchar('\n');
  51 }