contrib/ipfilter/lib/printpacket6.c

   1 /*      $FreeBSD$       */
   2
   3 /*
   4  * Copyright (C) 2012 by Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  * $Id$
   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
  18 printpacket6(dir, m)
  19         int dir;
  20         mb_t *m;
  21 {
  22         u_char *buf, p;
  23         u_short plen, *addrs;
  24         tcphdr_t *tcp;
  25         u_32_t flow;
  26
  27         buf = (u_char *)m->mb_data;
  28         tcp = (tcphdr_t *)(buf + 40);
  29         p = buf[6];
  30         flow = ntohl(*(u_32_t *)buf);
  31         flow &= 0xfffff;
  32         plen = ntohs(*((u_short *)buf +2));
  33         addrs = (u_short *)buf + 4;
  34
  35         if (dir)
  36                 PRINTF("> ");
  37         else
  38                 PRINTF("< ");
  39
  40         PRINTF("%s ", IFNAME(m->mb_ifp));
  41
  42         PRINTF("ip6/%d %d %#x %d", buf[0] & 0xf, plen, flow, p);
  43         PRINTF(" %x:%x:%x:%x:%x:%x:%x:%x",
  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_sport));
  50         PRINTF(" >");
  51         addrs += 8;
  52         PRINTF(" %x:%x:%x:%x:%x:%x:%x:%x",
  53                 ntohs(addrs[0]), ntohs(addrs[1]), ntohs(addrs[2]),
  54                 ntohs(addrs[3]), ntohs(addrs[4]), ntohs(addrs[5]),
  55                 ntohs(addrs[6]), ntohs(addrs[7]));
  56         if (plen >= 4)
  57                 if (p == IPPROTO_TCP || p == IPPROTO_UDP)
  58                         PRINTF(",%d", ntohs(tcp->th_dport));
  59         putchar('\n');
  60 }