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
parent
044ab77dcc
commit
ea1e5318d5
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@ -41,6 +41,7 @@ __set_errno (const char *fn, int ln, int val)
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}
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#define set_errno(val) __set_errno (__PRETTY_FUNCTION__, __LINE__, (val))
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int find_winsock_errno (DWORD why);
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void __reg2 __set_winsock_errno (const char *fn, int ln);
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#define set_winsock_errno() __set_winsock_errno (__FUNCTION__, __LINE__)
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@ -590,6 +590,10 @@ class fhandler_socket: public fhandler_base
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int getpeereid (pid_t *pid, uid_t *euid, gid_t *egid);
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int socketpair (int af, int type, int protocol, int flags,
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fhandler_socket *fh_out);
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int setsockopt (int level, int optname, const void *optval,
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__socklen_t optlen);
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int getsockopt (int level, int optname, const void *optval,
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__socklen_t *optlen);
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int open (int flags, mode_t mode = 0);
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void __reg3 read (void *ptr, size_t& len);
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@ -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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@ -198,7 +198,7 @@ static const errmap_t wsock_errmap[] = {
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{0, NULL, 0}
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};
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static int
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int
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find_winsock_errno (DWORD why)
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{
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for (int i = 0; wsock_errmap[i].s != NULL; ++i)
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@ -762,194 +762,24 @@ cygwin_recvfrom (int fd, void *buf, size_t len, int flags,
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return res;
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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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/* exported as setsockopt: POSIX.1-2001, POSIX.1-2008, SVr4, 4.4BSD */
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extern "C" int
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cygwin_setsockopt (int fd, 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 res = -1;
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int ret = -1;
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__try
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{
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fhandler_socket *fh = get (fd);
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if (!fh)
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__leave;
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/* Preprocessing setsockopt. Set ignore to true if setsockopt call
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should 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
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handling for AF_LOCAL/SOCK_STREAM sockets. This allows to
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handle special situations in which connect is called before
|
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a listening socket 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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res = fh->af_local_set_no_getpeereid ();
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__leave;
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case SO_REUSEADDR:
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/* Per POSIX we must not be able to reuse a complete duplicate
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of a local TCP address (same IP, same port), even if
|
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SO_REUSEADDR has been set. This behaviour is maintained in
|
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WinSock for backward compatibility, while the WinSock
|
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standard behaviour of stream socket binding is equivalent to
|
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the POSIX behaviour as if SO_REUSEADDR has been set.
|
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The SO_EXCLUSIVEADDRUSE option has been added to allow an
|
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application to request POSIX standard behaviour in the
|
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non-SO_REUSEADDR case.
|
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|
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To emulate POSIX socket binding behaviour, note that
|
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SO_REUSEADDR has been set but don't call setsockopt.
|
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Instead fhandler_socket::bind sets SO_EXCLUSIVEADDRUSE if
|
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the application 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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__leave;
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}
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if (fh->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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__leave;
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}
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if (timeval_to_ms ((struct timeval *) optval,
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(optname == SO_RCVTIMEO)
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? fh->rcvtimeo () : fh->sndtimeo ()))
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res = 0;
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else
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set_errno (EDOM);
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__leave;
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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
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setsockopt and TOS was never implemented for TCP anyway.
|
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setsockopt returns WinSock error 10022, WSAEINVAL when
|
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trying to set the IP_TOS 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 setsockopt (or not) */
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if (ignore)
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res = 0;
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else
|
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{
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res = setsockopt (fh->get_socket (), level, optname,
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(const char *) optval, optlen);
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if (res == SOCKET_ERROR)
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{
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set_winsock_errno ();
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__leave;
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}
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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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|
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/* Postprocessing setsockopt, setting fhandler_socket members, etc. */
|
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switch (level)
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||||
{
|
||||
case SOL_SOCKET:
|
||||
switch (optname)
|
||||
{
|
||||
case SO_REUSEADDR:
|
||||
fh->saw_reuseaddr (*(int *) optval);
|
||||
break;
|
||||
|
||||
case SO_RCVBUF:
|
||||
fh->rmem (*(int *) optval);
|
||||
break;
|
||||
|
||||
case SO_SNDBUF:
|
||||
fh->wmem (*(int *) optval);
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
__except (EFAULT)
|
||||
{
|
||||
res = -1;
|
||||
if (fh)
|
||||
ret = fh->setsockopt (level, optname, optval, optlen);
|
||||
}
|
||||
__except (EFAULT) {}
|
||||
__endtry
|
||||
syscall_printf ("%R = setsockopt(%d, %d, %y, %p, %d)",
|
||||
res, fd, level, optname, optval, optlen);
|
||||
return res;
|
||||
ret, fd, level, optname, optval, optlen);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* exported as getsockopt: POSIX.1-2001, POSIX.1-2008, SVr4, 4.4BSD */
|
||||
|
|
@ -957,170 +787,19 @@ extern "C" int
|
|||
cygwin_getsockopt (int fd, int level, int optname, void *optval,
|
||||
socklen_t *optlen)
|
||||
{
|
||||
bool ignore = false;
|
||||
bool onebyte = false;
|
||||
int res = -1;
|
||||
int ret = -1;
|
||||
|
||||
__try
|
||||
{
|
||||
fhandler_socket *fh = get (fd);
|
||||
if (!fh)
|
||||
__leave;
|
||||
|
||||
/* Preprocessing getsockopt. Set ignore to true if getsockopt call
|
||||
should get skipped entirely. */
|
||||
switch (level)
|
||||
{
|
||||
case SOL_SOCKET:
|
||||
switch (optname)
|
||||
{
|
||||
case SO_PEERCRED:
|
||||
{
|
||||
struct ucred *cred = (struct ucred *) optval;
|
||||
|
||||
if (*optlen < (socklen_t) sizeof *cred)
|
||||
{
|
||||
set_errno (EINVAL);
|
||||
__leave;
|
||||
}
|
||||
res = fh->getpeereid (&cred->pid, &cred->uid, &cred->gid);
|
||||
if (!res)
|
||||
*optlen = (socklen_t) sizeof *cred;
|
||||
__leave;
|
||||
}
|
||||
break;
|
||||
|
||||
case SO_REUSEADDR:
|
||||
{
|
||||
unsigned int *reuseaddr = (unsigned int *) optval;
|
||||
|
||||
if (*optlen < (socklen_t) sizeof *reuseaddr)
|
||||
{
|
||||
set_errno (EINVAL);
|
||||
__leave;
|
||||
}
|
||||
*reuseaddr = fh->saw_reuseaddr();
|
||||
*optlen = (socklen_t) sizeof *reuseaddr;
|
||||
ignore = true;
|
||||
}
|
||||
break;
|
||||
|
||||
case SO_RCVTIMEO:
|
||||
case SO_SNDTIMEO:
|
||||
{
|
||||
struct timeval *time_out = (struct timeval *) optval;
|
||||
|
||||
if (*optlen < (socklen_t) sizeof *time_out)
|
||||
{
|
||||
set_errno (EINVAL);
|
||||
__leave;
|
||||
}
|
||||
DWORD ms = (optname == SO_RCVTIMEO) ? fh->rcvtimeo ()
|
||||
: fh->sndtimeo ();
|
||||
if (ms == 0 || ms == INFINITE)
|
||||
{
|
||||
time_out->tv_sec = 0;
|
||||
time_out->tv_usec = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
time_out->tv_sec = ms / MSPERSEC;
|
||||
time_out->tv_usec = ((ms % MSPERSEC) * USPERSEC) / MSPERSEC;
|
||||
}
|
||||
*optlen = (socklen_t) sizeof *time_out;
|
||||
res = 0;
|
||||
__leave;
|
||||
}
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
|
||||
case IPPROTO_IP:
|
||||
/* Old applications still use the old WinSock1 IPPROTO_IP values. */
|
||||
if (CYGWIN_VERSION_CHECK_FOR_USING_WINSOCK1_VALUES)
|
||||
optname = convert_ws1_ip_optname (optname);
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
/* Call getsockopt (or not) */
|
||||
if (ignore)
|
||||
res = 0;
|
||||
else
|
||||
{
|
||||
res = getsockopt (fh->get_socket (), level, optname, (char *) optval,
|
||||
(int *) optlen);
|
||||
if (res == SOCKET_ERROR)
|
||||
{
|
||||
set_winsock_errno ();
|
||||
__leave;
|
||||
}
|
||||
}
|
||||
|
||||
/* Postprocessing getsockopt, setting fhandler_socket members, etc.
|
||||
Set onebyte to true for options returning a BOOLEAN instead of a
|
||||
boolean DWORD. */
|
||||
switch (level)
|
||||
{
|
||||
case SOL_SOCKET:
|
||||
switch (optname)
|
||||
{
|
||||
case SO_ERROR:
|
||||
{
|
||||
int *e = (int *) optval;
|
||||
debug_printf ("WinSock SO_ERROR = %d", *e);
|
||||
*e = find_winsock_errno (*e);
|
||||
}
|
||||
break;
|
||||
|
||||
case SO_KEEPALIVE:
|
||||
case SO_DONTROUTE:
|
||||
onebyte = true;
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case IPPROTO_TCP:
|
||||
switch (optname)
|
||||
{
|
||||
case TCP_NODELAY:
|
||||
onebyte = true;
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
if (onebyte)
|
||||
{
|
||||
/* Regression in Vista and later: instead of a 4 byte BOOL value,
|
||||
a 1 byte BOOLEAN value is returned, in contrast to older systems
|
||||
and the documentation. Since an int type is expected by the
|
||||
calling application, we convert the result here. For some reason
|
||||
only three BSD-compatible socket options seem to be affected. */
|
||||
BOOLEAN *in = (BOOLEAN *) optval;
|
||||
int *out = (int *) optval;
|
||||
*out = *in;
|
||||
*optlen = 4;
|
||||
}
|
||||
}
|
||||
__except (EFAULT)
|
||||
{
|
||||
res = -1;
|
||||
if (fh)
|
||||
ret = fh->getsockopt (level, optname, optval, optlen);
|
||||
}
|
||||
__except (EFAULT) {}
|
||||
__endtry
|
||||
syscall_printf ("%R = getsockopt(%d, %d, %y, %p, %p)",
|
||||
res, fd, level, optname, optval, optlen);
|
||||
return res;
|
||||
ret, fd, level, optname, optval, optlen);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* POSIX.1-2001 */
|
||||
|
|
|
|||
Loading…
Reference in New Issue