contrib/ipfilter/lib/printpacket6.c

   1 /*      $FreeBSD$       */
   2
   3 #include "ipf.h"
   4
   5 /*
   6  * This is meant to work without the IPv6 header files being present or
   7  * the inet_ntop() library.
   8  */
   9 void printpacket6(ip)
  10 struct ip *ip;
  11 {
  12         u_char *buf, p;
  13         u_short plen, *addrs;
  14         tcphdr_t *tcp;
  15         u_32_t flow;
  16
  17         buf = (u_char *)ip;
  18         tcp = (tcphdr_t *)(buf + 40);
  19         p = buf[6];
  20         flow = ntohl(*(u_32_t *)buf);
  21         flow &= 0xfffff;
  22         plen = ntohs(*((u_short *)buf +2));
  23         addrs = (u_short *)buf + 4;
  24
  25         printf("ip6/%d %d %#x %d", buf[0] & 0xf, plen, flow, p);
  26         printf(" %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
  27                 ntohs(addrs[0]), ntohs(addrs[1]), ntohs(addrs[2]),
  28                 ntohs(addrs[3]), ntohs(addrs[4]), ntohs(addrs[5]),
  29                 ntohs(addrs[6]), ntohs(addrs[7]));
  30         if (plen >= 4)
  31                 if (p == IPPROTO_TCP || p == IPPROTO_UDP)
  32                         (void)printf(",%d", ntohs(tcp->th_sport));
  33         printf(" >");
  34         addrs += 8;
  35         printf(" %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
  36                 ntohs(addrs[0]), ntohs(addrs[1]), ntohs(addrs[2]),
  37                 ntohs(addrs[3]), ntohs(addrs[4]), ntohs(addrs[5]),
  38                 ntohs(addrs[6]), ntohs(addrs[7]));
  39         if (plen >= 4)
  40                 if (p == IPPROTO_TCP || p == IPPROTO_UDP)
  41                         (void)printf(",%d", ntohs(tcp->th_dport));
  42         putchar('\n');
  43 }