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create_icmp6_socket.c 903 B

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  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 tarball for details.
  9. */
  10. #include "libbb.h"
  11. #if ENABLE_FEATURE_IPV6
  12. int FAST_FUNC create_icmp6_socket(void)
  13. {
  14. int sock;
  15. #if 0
  16. struct protoent *proto;
  17. proto = getprotobyname("ipv6-icmp");
  18. /* if getprotobyname failed, just silently force
  19. * proto->p_proto to have the correct value for "ipv6-icmp" */
  20. sock = socket(AF_INET6, SOCK_RAW,
  21. (proto ? proto->p_proto : IPPROTO_ICMPV6));
  22. #else
  23. sock = socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6);
  24. #endif
  25. if (sock < 0) {
  26. if (errno == EPERM)
  27. bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
  28. bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
  29. }
  30. /* drop root privs if running setuid */
  31. xsetuid(getuid());
  32. return sock;
  33. }
  34. #endif