Fix two more possible crashes in CEL

These are locations that should return valid snapshots, but need to be
handled if not.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@391855 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/stasis_bridging.h

@@ -39,6 +39,8 @@ struct ast_bridge_snapshot {
 		AST_STRING_FIELD(uniqueid);
 		/*! Bridge technology that is handling the bridge */
 		AST_STRING_FIELD(technology);
+		/*! Bridge subclass that is handling the bridge */
+		AST_STRING_FIELD(subclass);
 	);
 	/*! AO2 container of bare channel uniqueid strings participating in the bridge.
 	 * Allocated from ast_str_container_alloc() */

main/cel.c

@@ -1283,6 +1283,10 @@ static void cel_snapshot_update_cb(void *data, struct stasis_subscription *sub,
 
 			/* create a bridge_assoc for this bridge and mark it as being tracked appropriately */
 			chan_snapshot = ast_channel_snapshot_get_latest(channel_id);
+			if (!chan_snapshot) {
+				return;
+			}
+
 			ast_assert(chan_snapshot != NULL);
 			assoc = bridge_assoc_alloc(chan_snapshot, new_snapshot->uniqueid, chan_snapshot->name);
 			if (!assoc) {
@@ -1329,6 +1333,10 @@ static void cel_bridge_enter_cb(
 			ao2_iterator_destroy(&i);
 
 			latest_primary = ast_channel_snapshot_get_latest(channel_id);
+			if (!latest_primary) {
+				return;
+			}
+
 			add_bridge_primary(latest_primary, snapshot->uniqueid, chan_snapshot->name);
 			report_event_snapshot(latest_primary, AST_CEL_BRIDGE_START, NULL, NULL, chan_snapshot->name);
 		}

main/stasis_bridging.c

@@ -92,6 +92,7 @@ struct ast_bridge_snapshot *ast_bridge_snapshot_create(struct ast_bridge *bridge
 
 	ast_string_field_set(snapshot, uniqueid, bridge->uniqueid);
 	ast_string_field_set(snapshot, technology, bridge->technology->name);
+	ast_string_field_set(snapshot, subclass, bridge->v_table->name);
 
 	snapshot->feature_flags = bridge->feature_flags;
 	snapshot->capabilities = bridge->technology->capabilities;
@@ -291,24 +292,68 @@ void ast_bridge_publish_leave(struct ast_bridge *bridge, struct ast_channel *cha
 	stasis_publish(ast_bridge_topic(bridge), msg);
 }
 
+typedef struct ast_json *(*json_item_serializer_cb)(void *obj);
+
+static struct ast_json *container_to_json_array(struct ao2_container *items, json_item_serializer_cb item_cb)
+{
+	RAII_VAR(struct ast_json *, json_items, ast_json_array_create(), ast_json_unref);
+	void *item;
+	struct ao2_iterator it;
+	if (!json_items) {
+		return NULL;
+	}
+
+	it = ao2_iterator_init(items, 0);
+	while ((item = ao2_iterator_next(&it))) {
+		if (ast_json_array_append(json_items, item_cb(item))) {
+			ao2_iterator_destroy(&it);
+			return NULL;
+		}
+	}
+	ao2_iterator_destroy(&it);
+
+	return ast_json_ref(json_items);
+}
+
+static const char *capability2str(uint32_t capabilities)
+{
+	if (capabilities & AST_BRIDGE_CAPABILITY_HOLDING) {
+		return "holding";
+	} else {
+		return "mixing";
+	}
+}
+
 struct ast_json *ast_bridge_snapshot_to_json(const struct ast_bridge_snapshot *snapshot)
 {
-	RAII_VAR(struct ast_json *, json_chan, NULL, ast_json_unref);
-	int r = 0;
+	RAII_VAR(struct ast_json *, json_bridge, NULL, ast_json_unref);
+	struct ast_json *json_channels;
 
 	if (snapshot == NULL) {
 		return NULL;
 	}
 
-	json_chan = ast_json_object_create();
-	if (!json_chan) { ast_log(LOG_ERROR, "Error creating channel json object\n"); return NULL; }
+	json_channels = container_to_json_array(snapshot->channels,
+		(json_item_serializer_cb)ast_json_string_create);
+	if (!json_channels) {
+		return NULL;
+	}
 
-	r = ast_json_object_set(json_chan, "bridge-uniqueid", ast_json_string_create(snapshot->uniqueid));
-	if (r) { ast_log(LOG_ERROR, "Error adding attrib to channel json object\n"); return NULL; }
-	r = ast_json_object_set(json_chan, "bridge-technology", ast_json_string_create(snapshot->technology));
-	if (r) { ast_log(LOG_ERROR, "Error adding attrib to channel json object\n"); return NULL; }
+	json_bridge = ast_json_pack("{s: s, s: s, s: s, s: s, s: s, s: s, s: s, s: s, s: o}",
+		"bridgeUniqueid", snapshot->uniqueid,
+		"bridgeTechnology", snapshot->technology,
+		"bridgeType", capability2str(snapshot->capabilities),
+		"one_to_one", (snapshot->capabilities & AST_BRIDGE_CAPABILITY_1TO1MIX) ? "yes" : "no",
+		"multimix", (snapshot->capabilities & AST_BRIDGE_CAPABILITY_MULTIMIX) ? "yes" : "no",
+		"native", (snapshot->capabilities & AST_BRIDGE_CAPABILITY_NATIVE) ? "yes" : "no",
+		"holding", (snapshot->capabilities & AST_BRIDGE_CAPABILITY_HOLDING) ? "yes" : "no",
+		"bridgeClass", snapshot->subclass,
+		"channels", json_channels);
+	if (!json_bridge) {
+		return NULL;
+	}
 
-	return ast_json_ref(json_chan);
+	return ast_json_ref(json_bridge);
 }
 
 struct ast_bridge_snapshot *ast_bridge_snapshot_get_latest(const char *uniqueid)

rest-api/api-docs/bridges.json

@@ -34,8 +34,7 @@
 							"allowedValues": {
 								"type": "LIST",
 								"values": [
-									"two-party",
-									"multi-party",
+									"mixing",
 									"holding"
 								]
 							}
@@ -240,8 +239,7 @@
 					"allowedValues": {
 						"type": "LIST",
 						"values": [
-							"two-party",
-							"multi-party",
+							"mixing",
 							"holding"
 						]
 					}