Cygwin: set/getsockopt: Move implementation into fhandler_socket class
This requires to export find_winsock_errno from net.cc. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen
@@ -2685,3 +2685,333 @@ fhandler_socket::getpeereid (pid_t *pid, uid_t *euid, gid_t *egid)
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__endtry
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return -1;
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}
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static int
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convert_ws1_ip_optname (int optname)
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{
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static int ws2_optname[] =
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{
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0,
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IP_OPTIONS,
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IP_MULTICAST_IF,
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IP_MULTICAST_TTL,
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IP_MULTICAST_LOOP,
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IP_ADD_MEMBERSHIP,
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IP_DROP_MEMBERSHIP,
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IP_TTL,
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IP_TOS,
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IP_DONTFRAGMENT
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};
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return (optname < 1 || optname > _WS1_IP_DONTFRAGMENT)
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? optname
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: ws2_optname[optname];
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}
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int
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fhandler_socket::setsockopt (int level, int optname, const void *optval,
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socklen_t optlen)
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{
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bool ignore = false;
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int ret = -1;
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/* Preprocessing setsockopt. Set ignore to true if setsockopt call should
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get skipped entirely. */
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switch (level)
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{
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case SOL_SOCKET:
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switch (optname)
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{
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case SO_PEERCRED:
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/* Switch off the AF_LOCAL handshake and thus SO_PEERCRED handling
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for AF_LOCAL/SOCK_STREAM sockets. This allows to handle special
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situations in which connect is called before a listening socket
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accepts connections.
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FIXME: In the long run we should find a more generic solution
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which doesn't require a blocking handshake in accept/connect
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to exchange SO_PEERCRED credentials. */
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if (optval || optlen)
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set_errno (EINVAL);
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else
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ret = af_local_set_no_getpeereid ();
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return ret;
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case SO_REUSEADDR:
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/* Per POSIX we must not be able to reuse a complete duplicate of a
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local TCP address (same IP, same port), even if SO_REUSEADDR has
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been set. This behaviour is maintained in WinSock for backward
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compatibility, while the WinSock standard behaviour of stream
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socket binding is equivalent to the POSIX behaviour as if
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SO_REUSEADDR has been set. The SO_EXCLUSIVEADDRUSE option has
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been added to allow an application to request POSIX standard
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behaviour in the non-SO_REUSEADDR case.
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To emulate POSIX socket binding behaviour, note that SO_REUSEADDR
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has been set but don't call setsockopt. Instead
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fhandler_socket::bind sets SO_EXCLUSIVEADDRUSE if the application
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did not set SO_REUSEADDR. */
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if (optlen < (socklen_t) sizeof (int))
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{
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set_errno (EINVAL);
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return ret;
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}
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if (get_socket_type () == SOCK_STREAM)
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ignore = true;
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break;
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case SO_RCVTIMEO:
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case SO_SNDTIMEO:
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if (optlen < (socklen_t) sizeof (struct timeval))
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{
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set_errno (EINVAL);
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return ret;
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}
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if (timeval_to_ms ((struct timeval *) optval,
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(optname == SO_RCVTIMEO) ? rcvtimeo ()
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: sndtimeo ()))
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ret = 0;
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else
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set_errno (EDOM);
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return ret;
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default:
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break;
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}
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break;
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case IPPROTO_IP:
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/* Old applications still use the old WinSock1 IPPROTO_IP values. */
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if (CYGWIN_VERSION_CHECK_FOR_USING_WINSOCK1_VALUES)
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optname = convert_ws1_ip_optname (optname);
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switch (optname)
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{
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case IP_TOS:
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/* Winsock doesn't support setting the IP_TOS field with setsockopt
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and TOS was never implemented for TCP anyway. setsockopt returns
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WinSock error 10022, WSAEINVAL when trying to set the IP_TOS
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field. We just return 0 instead. */
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ignore = true;
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break;
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default:
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break;
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}
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break;
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case IPPROTO_IPV6:
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{
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switch (optname)
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{
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case IPV6_TCLASS:
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/* Unsupported */
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ignore = true;
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break;
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default:
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break;
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}
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}
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default:
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break;
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}
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/* Call Winsock setsockopt (or not) */
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if (ignore)
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ret = 0;
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else
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{
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ret = ::setsockopt (get_socket (), level, optname, (const char *) optval,
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optlen);
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if (ret == SOCKET_ERROR)
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{
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set_winsock_errno ();
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return ret;
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}
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}
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if (optlen == (socklen_t) sizeof (int))
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debug_printf ("setsockopt optval=%x", *(int *) optval);
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/* Postprocessing setsockopt, setting fhandler_socket members, etc. */
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switch (level)
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{
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case SOL_SOCKET:
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switch (optname)
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{
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case SO_REUSEADDR:
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saw_reuseaddr (*(int *) optval);
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break;
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case SO_RCVBUF:
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rmem (*(int *) optval);
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break;
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case SO_SNDBUF:
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wmem (*(int *) optval);
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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return ret;
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}
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int
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fhandler_socket::getsockopt (int level, int optname, const void *optval,
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socklen_t *optlen)
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{
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bool ignore = false;
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bool onebyte = false;
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int ret = -1;
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/* Preprocessing getsockopt. Set ignore to true if getsockopt call should
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get skipped entirely. */
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switch (level)
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{
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case SOL_SOCKET:
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switch (optname)
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{
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case SO_PEERCRED:
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{
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struct ucred *cred = (struct ucred *) optval;
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if (*optlen < (socklen_t) sizeof *cred)
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{
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set_errno (EINVAL);
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return ret;
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}
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ret = getpeereid (&cred->pid, &cred->uid, &cred->gid);
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if (!ret)
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*optlen = (socklen_t) sizeof *cred;
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return ret;
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}
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break;
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case SO_REUSEADDR:
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{
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unsigned int *reuseaddr = (unsigned int *) optval;
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if (*optlen < (socklen_t) sizeof *reuseaddr)
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{
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set_errno (EINVAL);
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return ret;
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}
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*reuseaddr = saw_reuseaddr();
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*optlen = (socklen_t) sizeof *reuseaddr;
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ignore = true;
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}
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break;
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case SO_RCVTIMEO:
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case SO_SNDTIMEO:
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{
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struct timeval *time_out = (struct timeval *) optval;
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if (*optlen < (socklen_t) sizeof *time_out)
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{
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set_errno (EINVAL);
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return ret;
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}
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DWORD ms = (optname == SO_RCVTIMEO) ? rcvtimeo () : sndtimeo ();
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if (ms == 0 || ms == INFINITE)
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{
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time_out->tv_sec = 0;
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time_out->tv_usec = 0;
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}
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else
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{
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time_out->tv_sec = ms / MSPERSEC;
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time_out->tv_usec = ((ms % MSPERSEC) * USPERSEC) / MSPERSEC;
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}
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*optlen = (socklen_t) sizeof *time_out;
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ret = 0;
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return ret;
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}
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default:
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break;
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}
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break;
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case IPPROTO_IP:
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/* Old applications still use the old WinSock1 IPPROTO_IP values. */
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if (CYGWIN_VERSION_CHECK_FOR_USING_WINSOCK1_VALUES)
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optname = convert_ws1_ip_optname (optname);
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break;
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default:
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break;
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}
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/* Call Winsock getsockopt (or not) */
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if (ignore)
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ret = 0;
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else
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{
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ret = ::getsockopt (get_socket (), level, optname, (char *) optval,
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(int *) optlen);
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if (ret == SOCKET_ERROR)
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{
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set_winsock_errno ();
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return ret;
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}
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}
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/* Postprocessing getsockopt, setting fhandler_socket members, etc. Set
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onebyte true for options returning BOOLEAN instead of a boolean DWORD. */
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switch (level)
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{
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case SOL_SOCKET:
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switch (optname)
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{
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case SO_ERROR:
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{
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int *e = (int *) optval;
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debug_printf ("WinSock SO_ERROR = %d", *e);
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*e = find_winsock_errno (*e);
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}
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break;
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case SO_KEEPALIVE:
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case SO_DONTROUTE:
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onebyte = true;
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break;
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default:
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break;
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}
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break;
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case IPPROTO_TCP:
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switch (optname)
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{
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case TCP_NODELAY:
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onebyte = true;
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break;
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default:
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break;
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}
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default:
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break;
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}
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if (onebyte)
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{
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/* Regression in Vista and later: instead of a 4 byte BOOL value, a
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1 byte BOOLEAN value is returned, in contrast to older systems and
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the documentation. Since an int type is expected by the calling
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application, we convert the result here. For some reason only three
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BSD-compatible socket options seem to be affected. */
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BOOLEAN *in = (BOOLEAN *) optval;
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int *out = (int *) optval;
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*out = *in;
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*optlen = 4;
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}
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return ret;
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}
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