[PATCH] ws2_32: Return a valid value for WSAIoctl SIO_IDEAL_SEND_BACKLOG_QUERY.

[Alistair Leslie-Hughes]

Signed-off-by: Alistair Leslie-Hughes <leslie_alistair(a)hotmail.com>
---
 dlls/ws2_32/socket.c     | 30 ++++++++++++++++++++++++++++++
 dlls/ws2_32/tests/sock.c | 14 +++++++++++++-
 2 files changed, 43 insertions(+), 1 deletion(-)

diff --git a/dlls/ws2_32/socket.c b/dlls/ws2_32/socket.c
index 0ed1af3092..a145b8c1f7 100644
--- a/dlls/ws2_32/socket.c
+++ b/dlls/ws2_32/socket.c
@@ -4784,6 +4784,36 @@ INT WINAPI WSAIoctl(SOCKET s, DWORD code, LPVOID in_buff, DWORD in_size, LPVOID
         break;
     }
 
+    case WS_SIO_IDEAL_SEND_BACKLOG_QUERY:
+    {
+        int ret, proto;
+        unsigned protolen = sizeof(protolen);
+
+        if (!out_buff)
+        {
+            SetLastError(WSAEFAULT);
+            return SOCKET_ERROR;
+        }
+
+        if ( (fd = get_sock_fd( s, 0, NULL )) == -1)
+            return SOCKET_ERROR;
+
+        ret = getsockopt(fd, SOL_SOCKET, SO_PROTOCOL, &proto, &protolen);
+        if(ret || proto != IPPROTO_TCP)
+        {
+            TRACE("ret %d, proto %d\n", ret, proto);
+            release_sock_fd( s, fd );
+            SetLastError(WSAEOPNOTSUPP);
+            return SOCKET_ERROR;
+        }
+
+        total = sizeof(DWORD);
+        *(DWORD*)out_buff = 0x10000; /* 64k */
+
+        release_sock_fd( s, fd );
+        break;
+    }
+
     case WS_SIOCATMARK:
     {
         unsigned int oob = 0, atmark = 0;
diff --git a/dlls/ws2_32/tests/sock.c b/dlls/ws2_32/tests/sock.c
index 7835246397..df3e893d10 100644
--- a/dlls/ws2_32/tests/sock.c
+++ b/dlls/ws2_32/tests/sock.c
@@ -6405,8 +6405,10 @@ static void test_WSASendTo(void)
     struct sockaddr_in addr;
     char buf[12] = "hello world";
     WSABUF data_buf;
-    DWORD bytesSent;
+    DWORD bytesSent, size;
     int ret;
+    ULONG backlog = 0;
+    int iret;
 
     addr.sin_family = AF_INET;
     addr.sin_port = htons(139);
@@ -6436,6 +6438,11 @@ static void test_WSASendTo(void)
     }
     ok(!WSAGetLastError(), "WSAGetLastError() should return zero after "
             "a successful call to WSASendTo()\n");
+
+    iret = WSAIoctl(s, SIO_IDEAL_SEND_BACKLOG_QUERY, NULL, 0, &backlog, sizeof(backlog), &size, NULL, NULL);
+    ok(iret == SOCKET_ERROR && WSAGetLastError() == WSAEOPNOTSUPP,
+       "WSAIoctl() failed: %d/%d\n", iret, WSAGetLastError());
+    closesocket(s);
 }
 
 static DWORD WINAPI recv_thread(LPVOID arg)
@@ -6476,6 +6483,7 @@ static void test_WSARecv(void)
     DWORD dwret;
     BOOL bret;
     HANDLE thread, event = NULL, io_port;
+    ULONG backlog = 0, size;
 
     tcp_socketpair(&src, &dest);
     if (src == INVALID_SOCKET || dest == INVALID_SOCKET)
@@ -6629,6 +6637,10 @@ static void test_WSARecv(void)
 
     CloseHandle(io_port);
 
+    iret = WSAIoctl(src, SIO_IDEAL_SEND_BACKLOG_QUERY, NULL, 0, &backlog, sizeof(backlog), &size, NULL, NULL);
+    ok(!iret, "WSAIoctl() failed: %d/%d\n", iret, WSAGetLastError());
+    ok(backlog == 0x10000, "got %08x\n", backlog);
+
 end:
     if (server != INVALID_SOCKET)
         closesocket(server);
-- 
2.28.0