[asterisk-commits] mmichelson: branch 1.8 r372840 - /branches/1.8/main/features.c

[SVN commits to the Asterisk project]

Author: mmichelson
Date: Tue Sep 11 10:26:10 2012
New Revision: 372840

URL: http://svnview.digium.com/svn/asterisk?view=rev&rev=372840
Log:
Fix bad channel application data reference.

When channels get bridged due to an AMI bridge action
or a DTMF attended transfer, the two channels that
get bridged have their application data pointing to
the other channel's name. This means that if one channel
is hung up but the other moves on, it means that the
channel that moves on will have its application data
pointing at freed memory.

(issue ASTERISK-20335)


Modified:
    branches/1.8/main/features.c

Modified: branches/1.8/main/features.c
URL: http://svnview.digium.com/svn/asterisk/branches/1.8/main/features.c?view=diff&rev=372840&r1=372839&r2=372840
==============================================================================
--- branches/1.8/main/features.c (original)
+++ branches/1.8/main/features.c Tue Sep 11 10:26:10 2012
@@ -945,6 +945,33 @@
 	struct ast_channel *transferee, const char *type, format_t format, void *data,
 	int timeout, int *outstate, const char *language);
 
+static const struct ast_datastore_info channel_app_data_datastore = {
+	.type = "Channel appdata datastore",
+	.destroy = ast_free_ptr,
+};
+
+static int set_chan_app_data(struct ast_channel *chan, const char *src_app_data)
+{
+	struct ast_datastore *datastore;
+	char *dst_app_data;
+
+	datastore = ast_datastore_alloc(&channel_app_data_datastore, NULL);
+	if (!datastore) {
+		return -1;
+	}
+
+	dst_app_data = ast_malloc(strlen(src_app_data) + 1);
+	if (!dst_app_data) {
+		ast_datastore_free(datastore);
+		return -1;
+	}
+
+	chan->data = strcpy(dst_app_data, src_app_data);
+	datastore->data = dst_app_data;
+	ast_channel_datastore_add(chan, datastore);
+	return 0;
+}
+
 /*!
  * \brief bridge the call 
  * \param data thread bridge.
@@ -958,9 +985,13 @@
 	struct ast_bridge_thread_obj *tobj = data;
 
 	tobj->chan->appl = !tobj->return_to_pbx ? "Transferred Call" : "ManagerBridge";
-	tobj->chan->data = tobj->peer->name;
+	if (set_chan_app_data(tobj->chan, tobj->peer->name)) {
+		tobj->chan->data = "(Empty)";
+	}
 	tobj->peer->appl = !tobj->return_to_pbx ? "Transferred Call" : "ManagerBridge";
-	tobj->peer->data = tobj->chan->name;
+	if (set_chan_app_data(tobj->peer, tobj->chan->name)) {
+		tobj->peer->data = "(Empty)";
+	}
 
 	ast_bridge_call(tobj->peer, tobj->chan, &tobj->bconfig);