ws2_32: ConnectEx should not work on unbound socket.

dlls/ws2_32/socket.c

@@ -2726,6 +2726,8 @@ static BOOL WINAPI WS2_ConnectEx(SOCKET s, const struct WS_sockaddr* name, int n
                           PVOID sendBuf, DWORD sendBufLen, LPDWORD sent, LPOVERLAPPED ov)
 {
     int fd, ret, status;
+    union generic_unix_sockaddr uaddr;
+    socklen_t uaddrlen = sizeof(uaddr);
 
     if (!ov)
     {
@@ -2743,7 +2745,17 @@ static BOOL WINAPI WS2_ConnectEx(SOCKET s, const struct WS_sockaddr* name, int n
     TRACE("socket %04lx, ptr %p %s, length %d, sendptr %p, len %d, ov %p\n",
           s, name, debugstr_sockaddr(name), namelen, sendBuf, sendBufLen, ov);
 
-    /* FIXME: technically the socket has to be bound */
+    if (getsockname(fd, &uaddr.addr, &uaddrlen) != 0)
+    {
+        SetLastError(wsaErrno());
+        return FALSE;
+    }
+    else if (!is_sockaddr_bound(&uaddr.addr, uaddrlen))
+    {
+        SetLastError(WSAEINVAL);
+        return FALSE;
+    }
+
     ret = do_connect(fd, name, namelen);
     if (ret == 0)
     {

dlls/ws2_32/tests/sock.c

@@ -5097,7 +5097,7 @@ static void test_ConnectEx(void)
         "returned %d + errno %d\n", bret, WSAGetLastError());
 
     bret = pConnectEx(connector, (struct sockaddr*)&address, addrlen, NULL, 0, &bytesReturned, &overlapped);
-    todo_wine ok(bret == FALSE && WSAGetLastError() == WSAEINVAL, "ConnectEx on a unbound socket "
+    ok(bret == FALSE && WSAGetLastError() == WSAEINVAL, "ConnectEx on a unbound socket "
         "returned %d + errno %d\n", bret, WSAGetLastError());
     if (bret == TRUE || WSAGetLastError() != WSAEINVAL)
     {