ws2_32: Manage shorter length for SO_SNDBUF.

dlls/ws2_32/socket.c

@@ -1626,6 +1626,12 @@ int WINAPI getsockopt( SOCKET s, int level, int optname, char *optval, int *optl
             return ret;
 
         case SO_SNDBUF:
+            if (*optlen < sizeof(DWORD) || !optval)
+            {
+                if (optval) memset( optval, 0, *optlen );
+                SetLastError( WSAEFAULT );
+                return SOCKET_ERROR;
+            }
             return server_getsockopt( s, IOCTL_AFD_WINE_GET_SO_SNDBUF, optval, optlen );
 
         case SO_SNDTIMEO:
@@ -2888,6 +2894,7 @@ int WINAPI setsockopt( SOCKET s, int level, int optname, const char *optval, int
             return server_setsockopt( s, IOCTL_AFD_WINE_SET_SO_REUSEADDR, (char *)&value, sizeof(value) );
 
         case SO_SNDBUF:
+            if (optlen < 0) optlen = 4;
             return server_setsockopt( s, IOCTL_AFD_WINE_SET_SO_SNDBUF, optval, optlen );
 
         case SO_SNDTIMEO:

dlls/ws2_32/tests/sock.c

@@ -1178,6 +1178,7 @@ static void test_set_getsockopt(void)
         {AF_INET, SOCK_STREAM, SOL_SOCKET, SO_DONTROUTE, TRUE, {1, 1, 1}, {0}, TRUE},
         {AF_INET, SOCK_STREAM, SOL_SOCKET, SO_RCVTIMEO, FALSE, {1, 2, 4}, {0}, TRUE},
         {AF_INET, SOCK_STREAM, SOL_SOCKET, SO_REUSEADDR, TRUE, {1, 1, 4}, {0, 0xdead0001, 0}, TRUE, TRUE},
+        {AF_INET, SOCK_STREAM, SOL_SOCKET, SO_SNDBUF, FALSE, {1, 2, 4}, {0xdeadbe00, 0xdead0000}, TRUE},
         {AF_INET, SOCK_STREAM, SOL_SOCKET, SO_SNDTIMEO, FALSE, {1, 2, 4}, {0}, TRUE},
         {AF_INET, SOCK_STREAM, SOL_SOCKET, SO_OPENTYPE, FALSE, {1, 2, 4}, {0}, TRUE},
         {AF_INET, SOCK_DGRAM, IPPROTO_IP, IP_MULTICAST_LOOP, TRUE, {1, 1, 4}, {0}, TRUE, TRUE},