From: Matthew Waters <matthew@centricular.com>
Date: Fri, 4 Dec 2020 06:02:00 +0000 (+1100)
Subject: rtmp2/connection: pass the parent cancellable down to the connection
X-Git-Tag: 1.19.3~507^2~974
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1f7515100caf06fb31d84a40be49dcefd176fce3;p=platform%2Fupstream%2Fgstreamer.git

rtmp2/connection: pass the parent cancellable down to the connection

Otherwise, when rtpm2src cancels an inflight operation that has a queued
message stored, then the rtmp connection operation is not stopped.

If the cancellation occurs during rtmp connection start up, then
rtpm2src does not have any way of accessing the connection object as it
has not been returned yet.  As a result, rtpm2src will cancel, the
connection will still be processing things and the
GMainContext/GMainLoop associated with the outstanding operation will be
destroyed.  All outstanding operations and the rtmpconnection object will
therefore be leaked in this case.

Fixes: https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/issues/1425
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1862>
---

diff --git a/gst/rtmp2/rtmp/rtmpclient.c b/gst/rtmp2/rtmp/rtmpclient.c
index dae50c6..d2746ef 100644
--- a/gst/rtmp2/rtmp/rtmpclient.c
+++ b/gst/rtmp2/rtmp/rtmpclient.c
@@ -499,7 +499,8 @@ handshake_done (GObject * source, GAsyncResult * result, gpointer user_data)
     return;
   }
 
-  data->connection = gst_rtmp_connection_new (socket_connection);
+  data->connection = gst_rtmp_connection_new (socket_connection,
+      g_task_get_cancellable (task));
   data->error_handler_id = g_signal_connect (data->connection,
       "error", G_CALLBACK (connection_error), task);
 
@@ -510,8 +511,9 @@ static void
 connection_error (GstRtmpConnection * connection, gpointer user_data)
 {
   GTask *task = user_data;
-  g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED,
-      "error during connection attempt");
+  if (!g_task_had_error (task))
+    g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_FAILED,
+        "error during connection attempt");
 }
 
 static gchar *
diff --git a/gst/rtmp2/rtmp/rtmpconnection.c b/gst/rtmp2/rtmp/rtmpconnection.c
index 22d1e69..a6eb5ad 100644
--- a/gst/rtmp2/rtmp/rtmpconnection.c
+++ b/gst/rtmp2/rtmp/rtmpconnection.c
@@ -251,7 +251,6 @@ gst_rtmp_connection_class_init (GstRtmpConnectionClass * klass)
 static void
 gst_rtmp_connection_init (GstRtmpConnection * rtmpconnection)
 {
-  rtmpconnection->cancellable = g_cancellable_new ();
   rtmpconnection->output_queue =
       g_async_queue_new_full ((GDestroyNotify) gst_buffer_unref);
   rtmpconnection->input_streams = gst_rtmp_chunk_streams_new ();
@@ -334,11 +333,16 @@ gst_rtmp_connection_set_socket_connection (GstRtmpConnection * sc,
 }
 
 GstRtmpConnection *
-gst_rtmp_connection_new (GSocketConnection * connection)
+gst_rtmp_connection_new (GSocketConnection * connection,
+    GCancellable * cancellable)
 {
   GstRtmpConnection *sc;
 
   sc = g_object_new (GST_TYPE_RTMP_CONNECTION, NULL);
+  if (cancellable)
+    sc->cancellable = g_object_ref (cancellable);
+  else
+    sc->cancellable = g_cancellable_new ();
 
   gst_rtmp_connection_set_socket_connection (sc, connection);
 
diff --git a/gst/rtmp2/rtmp/rtmpconnection.h b/gst/rtmp2/rtmp/rtmpconnection.h
index b20bc19..43e4430 100644
--- a/gst/rtmp2/rtmp/rtmpconnection.h
+++ b/gst/rtmp2/rtmp/rtmpconnection.h
@@ -51,7 +51,7 @@ typedef void (*GstRtmpCommandCallback) (const gchar * command_name,
 
 GType gst_rtmp_connection_get_type (void);
 
-GstRtmpConnection *gst_rtmp_connection_new (GSocketConnection * connection);
+GstRtmpConnection *gst_rtmp_connection_new (GSocketConnection * connection, GCancellable * cancellable);
 
 GSocket *gst_rtmp_connection_get_socket (GstRtmpConnection * connection);