bridge: During a smart bridge operation provide a more complete bridge to the old technology.

When a smart bridge operation occurs and a bridge transitions from one
technology to another the old technology is provided the channels formerly
in it and told that they are leaving. Unfortunately the bridge provided
along with them is incomplete. The bridge, despite there being channels in it,
contains none. This forces technology implementations to have additional
logic when channels are leaving or to store their own duplicated
state.

This change makes the bridge more complete so it contains the expected
channels. Now that the bridge is complete special logic within
bridge_native_rtp is no longer needed and has been removed.

Review: https://reviewboard.asterisk.org/r/4057/
........

Merged revisions 425242 from http://svn.asterisk.org/svn/asterisk/branches/12
........

Merged revisions 425243 from http://svn.asterisk.org/svn/asterisk/branches/13


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@425244 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 42 insertions, 15 deletions

diff --git a/main/bridge.c b/main/bridge.c
index 0478e4686..ab3bb17e6 100644
--- a/main/bridge.c
+++ b/main/bridge.c
@@ -1139,28 +1139,55 @@ static int smart_bridge_operation(struct ast_bridge *bridge)
 		return -1;
 	}
 
+	/* To ensure that things are sane for the old technology move the channels it
+	 * expects to the dummy bridge
+	 */
+	AST_LIST_TRAVERSE_SAFE_BEGIN(&bridge->channels, bridge_channel, entry) {
+		if (bridge_channel->just_joined) {
+			continue;
+		}
+		ast_debug(1, "Bridge %s: moving %p(%s) to dummy bridge temporarily\n",
+			bridge->uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan));
+		AST_LIST_REMOVE_CURRENT(entry);
+		AST_LIST_INSERT_TAIL(&dummy_bridge.channels, bridge_channel, entry);
+		dummy_bridge.num_channels++;
+		if (ast_test_flag(&bridge_channel->features->feature_flags, AST_BRIDGE_CHANNEL_FLAG_LONELY)) {
+			dummy_bridge.num_lonely++;
+		}
+		if (!bridge_channel->suspended) {
+			dummy_bridge.num_active++;
+		}
+	}
+	AST_LIST_TRAVERSE_SAFE_END;
+
+	/* Take all the channels out of the old technology */
+	AST_LIST_TRAVERSE_SAFE_BEGIN(&dummy_bridge.channels, bridge_channel, entry) {
+		ast_debug(1, "Bridge %s: %p(%s) is leaving %s technology (dummy)\n",
+			dummy_bridge.uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan),
+			old_technology->name);
+		if (old_technology->leave) {
+			old_technology->leave(&dummy_bridge, bridge_channel);
+		}
+		AST_LIST_REMOVE_CURRENT(entry);
+		AST_LIST_INSERT_TAIL(&bridge->channels, bridge_channel, entry);
+		dummy_bridge.num_channels--;
+		if (ast_test_flag(&bridge_channel->features->feature_flags, AST_BRIDGE_CHANNEL_FLAG_LONELY)) {
+			dummy_bridge.num_lonely--;
+		}
+		if (!bridge_channel->suspended) {
+			dummy_bridge.num_active--;
+		}
+	}
+	AST_LIST_TRAVERSE_SAFE_END;
+
 	ast_debug(1, "Bridge %s: calling %s technology stop\n",
 		dummy_bridge.uniqueid, old_technology->name);
 	if (old_technology->stop) {
 		old_technology->stop(&dummy_bridge);
 	}
 
-	/*
-	 * Move existing channels over to the new technology and
-	 * complete joining any new channels to the bridge.
-	 */
+	/* Add any new channels or re-add existing channels to the bridge. */
 	AST_LIST_TRAVERSE(&bridge->channels, bridge_channel, entry) {
-		if (!bridge_channel->just_joined) {
-			/* Take existing channel from the old technology. */
-			ast_debug(1, "Bridge %s: %p(%s) is leaving %s technology (dummy)\n",
-				dummy_bridge.uniqueid, bridge_channel, ast_channel_name(bridge_channel->chan),
-				old_technology->name);
-			if (old_technology->leave) {
-				old_technology->leave(&dummy_bridge, bridge_channel);
-			}
-		}
-
-		/* Add any new channels or re-add an existing channel to the bridge. */
 		bridge_channel_complete_join(bridge, bridge_channel);
 	}