ws2_32: Fix handling of POLLHUP in WSAPoll.

dlls/ws2_32/socket.c

@@ -5378,7 +5378,20 @@ int WINAPI WSAPoll(WSAPOLLFD *wfds, ULONG count, int timeout)
         if (ufds[i].fd != -1)
         {
             release_sock_fd(wfds[i].fd, ufds[i].fd);
-            wfds[i].revents = convert_poll_u2w(ufds[i].revents);
+            if (ufds[i].revents & POLLHUP)
+            {
+                /* Check if the socket still exists */
+                int fd = get_sock_fd(wfds[i].fd, 0, NULL);
+                if (fd != -1)
+                {
+                    wfds[i].revents = WS_POLLHUP;
+                    release_sock_fd(wfds[i].fd, fd);
+                }
+                else
+                    wfds[i].revents = WS_POLLNVAL;
+            }
+            else
+                wfds[i].revents = convert_poll_u2w(ufds[i].revents);
         }
         else
             wfds[i].revents = WS_POLLNVAL;

dlls/ws2_32/tests/sock.c

@@ -6672,7 +6672,6 @@ static void test_WSAPoll(void)
     POLL_SET(fdWrite, POLLIN);
     ret = pWSAPoll(fds, ix, poll_timeout);
     ok(ret == 1, "expected 1, got %d\n", ret);
-todo_wine
     ok(POLL_ISSET(fdWrite, POLLHUP), "fdWrite socket events incorrect\n");
     ret = recv(fdWrite, tmp_buf, sizeof(tmp_buf), 0);
     ok(ret == 0, "expected 0, got %d\n", ret);
@@ -6737,7 +6736,6 @@ todo_wine
     POLL_SET(fdWrite, POLLIN);
     ret = pWSAPoll(fds, ix, poll_timeout);
     ok(ret == 1, "expected 1, got %d\n", ret);
-todo_wine
     ok(POLL_ISSET(fdWrite, POLLNVAL), "fdWrite socket events incorrect\n");
     WaitForSingleObject (thread_handle, 1000);
     closesocket(fdRead);