server: Introduce IOCTL_AFD_CREATE.

include/wine/afd.h

+/*
+ * Socket driver ioctls
+ *
+ * Copyright 2020 Zebediah Figura for CodeWeavers
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifndef __WINE_WINE_AFD_H
+#define __WINE_WINE_AFD_H
+
+#include <winioctl.h>
+
+#define IOCTL_AFD_CREATE                    CTL_CODE(FILE_DEVICE_NETWORK, 200, METHOD_BUFFERED, FILE_WRITE_ACCESS)
+
+struct afd_create_params
+{
+    int family, type, protocol;
+    unsigned int flags;
+};
+
+#endif

server/sock.c

@@ -58,6 +58,7 @@
 #include "winerror.h"
 #define USE_WS_PREFIX
 #include "winsock2.h"
+#include "wine/afd.h"
 
 #include "process.h"
 #include "file.h"
@@ -133,6 +134,7 @@ static int sock_ioctl( struct fd *fd, ioctl_code_t code, struct async *async );
 static void sock_queue_async( struct fd *fd, struct async *async, int type, int count );
 static void sock_reselect_async( struct fd *fd, struct async_queue *queue );
 
+static int init_socket( struct sock *sock, int family, int type, int protocol, unsigned int flags );
 static int sock_get_ntstatus( int err );
 static unsigned int sock_get_error( int err );
 
@@ -542,10 +544,23 @@ static int sock_ioctl( struct fd *fd, ioctl_code_t code, struct async *async )
 
     assert( sock->obj.ops == &sock_ops );
 
-    if (get_unix_fd( fd ) == -1) return 0;
+    if (get_unix_fd( fd ) == -1 && code != IOCTL_AFD_CREATE) return 0;
 
     switch(code)
     {
+    case IOCTL_AFD_CREATE:
+    {
+        const struct afd_create_params *params = get_req_data();
+
+        if (get_req_data_size() != sizeof(*params))
+        {
+            set_error( STATUS_INVALID_PARAMETER );
+            return 0;
+        }
+        init_socket( sock, params->family, params->type, params->protocol, params->flags );
+        return 0;
+    }
+
     case WS_SIO_ADDRESS_LIST_CHANGE:
         if ((sock->state & FD_WINE_NONBLOCKING) && async_is_blocking( async ))
         {
@@ -680,6 +695,8 @@ static int init_socket( struct sock *sock, int family, int type, int protocol, u
     sock->type   = type;
     sock->family = family;
 
+    if (sock->fd) release_object( sock->fd );
+
     if (!(sock->fd = create_anonymous_fd( &sock_fd_ops, sockfd, &sock->obj,
                             (flags & WSA_FLAG_OVERLAPPED) ? 0 : FILE_SYNCHRONOUS_IO_NONALERT )))
     {