sbin/ipf/libipf/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(int dir, mb_t *m)
  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 *)m->mb_data;
  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         if (dir)
  34                 PRINTF("> ");
  35         else
  36                 PRINTF("< ");
  37
  38         PRINTF("%s ", IFNAME(m->mb_ifp));
  39
  40         PRINTF("ip6/%d %d %#x %d", buf[0] & 0xf, plen, flow, p);
  41         PRINTF(" %x:%x:%x:%x:%x:%x:%x:%x",
  42                 ntohs(addrs[0]), ntohs(addrs[1]), ntohs(addrs[2]),
  43                 ntohs(addrs[3]), ntohs(addrs[4]), ntohs(addrs[5]),
  44                 ntohs(addrs[6]), ntohs(addrs[7]));
  45         if (plen >= 4)
  46                 if (p == IPPROTO_TCP || p == IPPROTO_UDP)
  47                         (void)PRINTF(",%d", ntohs(tcp->th_sport));
  48         PRINTF(" >");
  49         addrs += 8;
  50         PRINTF(" %x:%x:%x:%x:%x:%x:%x:%x",
  51                 ntohs(addrs[0]), ntohs(addrs[1]), ntohs(addrs[2]),
  52                 ntohs(addrs[3]), ntohs(addrs[4]), ntohs(addrs[5]),
  53                 ntohs(addrs[6]), ntohs(addrs[7]));
  54         if (plen >= 4)
  55                 if (p == IPPROTO_TCP || p == IPPROTO_UDP)
  56                         PRINTF(",%d", ntohs(tcp->th_dport));
  57         putchar('\n');
  58 }