release/src/router/busybox/libbb/create_icmp6_socket.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Utility routines.
   4  *
   5  * create raw socket for icmp (IPv6 version) protocol
   6  * and drop root privileges if running setuid
   7  *
   8  * Licensed under GPLv2, see file LICENSE in this source tree.
   9  */
  10
  11 #include "libbb.h"
  12
  13 #if ENABLE_FEATURE_IPV6
  14 int FAST_FUNC create_icmp6_socket(void)
  15 {
  16         int sock;
  17 #if 0
  18         struct protoent *proto;
  19         proto = getprotobyname("ipv6-icmp");
  20         /* if getprotobyname failed, just silently force
  21          * proto->p_proto to have the correct value for "ipv6-icmp" */
  22         sock = socket(AF_INET6, SOCK_RAW,
  23                         (proto ? proto->p_proto : IPPROTO_ICMPV6));
  24 #else
  25         sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
  26 #endif
  27         if (sock < 0) {
  28                 if (errno == EPERM)
  29                         bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
  30                 bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
  31         }
  32
  33         /* drop root privs if running setuid */
  34         xsetuid(getuid());
  35
  36         return sock;
  37 }
  38 #endif