diff options
Diffstat (limited to 'winsup/cygwin/net.cc')
| -rw-r--r-- | winsup/cygwin/net.cc | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/winsup/cygwin/net.cc b/winsup/cygwin/net.cc index ded37aa05..8be32197c 100644 --- a/winsup/cygwin/net.cc +++ b/winsup/cygwin/net.cc @@ -649,8 +649,16 @@ cygwin_setsockopt (int fd, int level, int optname, const void *optval, if (level == IPPROTO_IP && CYGWIN_VERSION_CHECK_FOR_USING_WINSOCK1_VALUES) optname = convert_ws1_ip_optname (optname); - res = setsockopt (fh->get_socket (), level, optname, - (const char *) optval, optlen); + /* On systems supporting "enhanced socket security (2K3 and later), + the default behaviour of socket binding is equivalent to the POSIX + behaviour with SO_REUSEADDR. Setting SO_REUSEADDR would only result + in wrong behaviour. See also fhandler_socket::bind(). */ + if (level == SOL_SOCKET && optname == SO_REUSEADDR + && wincap.has_enhanced_socket_security ()) + res = 0; + else + res = setsockopt (fh->get_socket (), level, optname, + (const char *) optval, optlen); if (optlen == 4) syscall_printf ("setsockopt optval=%x", *(long *) optval); |