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ACN: Changes specific to the core

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Allow passing a topology from the called channel back to the
calling channel.

 * Added a new function ast_queue_answer() that accepts a stream
   topology and queues an ANSWER CONTROL frame with it as the
   data.  This allows the called channel to indicate its resolved
   topology.

 * Added a new virtual function to the channel tech structure
   answer_with_stream_topology() that allows the calling channel
   to receive the called channel's topology.  Added
   ast_raw_answer_with_stream_topology() that invokes that virtual
   function.

 * Modified app_dial.c and features.c to grab the topology from the
   ANSWER frame queued by the answering channel and send it to
   the calling channel with ast_raw_answer_with_stream_topology().

 * Modified frame.c to automatically cleanup the reference
   to the topology on ANSWER frames.

Added a few debugging messages to stream.c.

Change-Id: I0115d2ed68d6bae0f87e85abcf16c771bdaf992c
This commit is contained in:
George Joseph
2020-07-20 13:39:14 -06:00
committed by Joshua Colp
parent 543f936147
commit 6faf76308d
7 changed files with 155 additions and 10 deletions
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8
main/features.c
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@@ -76,6 +76,7 @@
#include "asterisk/stasis_channels.h"
#include "asterisk/features_config.h"
#include "asterisk/max_forwards.h"
#include "asterisk/stream.h"
/*** DOCUMENTATION
<application name="Bridge" language="en_US">
@@ -558,12 +559,17 @@ static int pre_bridge_setup(struct ast_channel *chan, struct ast_channel *peer,
set_config_flags(chan, config);
/* Answer if need be */
res = 0;
if (ast_channel_state(chan) != AST_STATE_UP) {
if (ast_raw_answer(chan)) {
res = ast_raw_answer_with_stream_topology(chan, config->answer_topology);
if (res != 0) {
return -1;
}
}
#ifdef FOR_DEBUG
/* show the two channels and cdrs involved in the bridge for debug & devel purposes */
ast_channel_log("Pre-bridge CHAN Channel info", chan);