multiudpsink: Fix broken SO_SNDBUF get/set on Windows

SO_SNDBUF has been undefined on Windows because of missing WinSock2.h
include. And don't use native socket functions (e.g., setsockopt())
if code is expected to be built on Windows. We don't link ws2_32.lib
for this plugin.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/1016>

diff --git a/gst/udp/gstmultiudpsink.c b/gst/udp/gstmultiudpsink.c
index 7f1cbbf..f5ddfa4 100644 (file)
--- a/gst/udp/gstmultiudpsink.c
+++ b/gst/udp/gstmultiudpsink.c
@@ -42,6 +42,8 @@
 #include <sys/socket.h>
 #endif
 
+#include <gio/gnetworking.h>
+
 #include "gst/net/net.h"
 #include "gst/glib-compat-private.h"
 
@@ -1341,10 +1343,9 @@ gst_multiudpsink_start (GstBaseSink * bsink)
   }
 #ifdef SO_SNDBUF
   {
-    socklen_t len;
-    gint sndsize, ret;
+    gint sndsize;
+    GError *opt_err = NULL;
 
-    len = sizeof (sndsize);
     if (sink->buffer_size != 0) {
       sndsize = sink->buffer_size;
 
@@ -1354,24 +1355,22 @@ gst_multiudpsink_start (GstBaseSink * bsink)
        * Linux. */
 
       if (sink->used_socket) {
-        ret =
-            setsockopt (g_socket_get_fd (sink->used_socket), SOL_SOCKET,
-            SO_SNDBUF, (void *) &sndsize, len);
-        if (ret != 0) {
+        if (!g_socket_set_option (sink->used_socket, SOL_SOCKET, SO_SNDBUF,
+                sndsize, &opt_err)) {
           GST_ELEMENT_WARNING (sink, RESOURCE, SETTINGS, (NULL),
-              ("Could not create a buffer of requested %d bytes, %d: %s",
-                  sndsize, ret, g_strerror (errno)));
+              ("Could not create a buffer of requested %d bytes (%s)",
+                  sndsize, opt_err->message));
+          g_clear_error (&opt_err);
         }
       }
 
       if (sink->used_socket_v6) {
-        ret =
-            setsockopt (g_socket_get_fd (sink->used_socket_v6), SOL_SOCKET,
-            SO_SNDBUF, (void *) &sndsize, len);
-        if (ret != 0) {
+        if (!g_socket_set_option (sink->used_socket_v6, SOL_SOCKET, SO_SNDBUF,
+                sndsize, &opt_err)) {
           GST_ELEMENT_WARNING (sink, RESOURCE, SETTINGS, (NULL),
-              ("Could not create a buffer of requested %d bytes, %d: %s",
-                  sndsize, ret, g_strerror (errno)));
+              ("Could not create a buffer of requested %d bytes (%s)",
+                  sndsize, opt_err->message));
+          g_clear_error (&opt_err);
         }
       }
     }
@@ -1380,23 +1379,21 @@ gst_multiudpsink_start (GstBaseSink * bsink)
      * value we set because the kernel allocates extra memory for metadata.
      * The default on Linux is about 100K (which is about 50K without metadata) */
     if (sink->used_socket) {
-      ret =
-          getsockopt (g_socket_get_fd (sink->used_socket), SOL_SOCKET,
-          SO_SNDBUF, (void *) &sndsize, &len);
-      if (ret == 0)
+      if (g_socket_get_option (sink->used_socket, SOL_SOCKET, SO_SNDBUF,
+              &sndsize, NULL)) {
         GST_DEBUG_OBJECT (sink, "have UDP buffer of %d bytes", sndsize);
-      else
+      } else {
         GST_DEBUG_OBJECT (sink, "could not get UDP buffer size");
+      }
     }
 
     if (sink->used_socket_v6) {
-      ret =
-          getsockopt (g_socket_get_fd (sink->used_socket_v6), SOL_SOCKET,
-          SO_SNDBUF, (void *) &sndsize, &len);
-      if (ret == 0)
+      if (g_socket_get_option (sink->used_socket_v6, SOL_SOCKET, SO_SNDBUF,
+              &sndsize, NULL)) {
         GST_DEBUG_OBJECT (sink, "have UDPv6 buffer of %d bytes", sndsize);
-      else
+      } else {
         GST_DEBUG_OBJECT (sink, "could not get UDPv6 buffer size");
+      }
     }
   }
 #endif