From 2feb049ba2a55a611e0f1c0981c27a0e17955a85 Mon Sep 17 00:00:00 2001
From: Joshua Colp <jcolp@digium.com>
Date: Wed, 31 Jul 2013 14:29:11 +0000
Subject: [PATCH] Fix hold/unhold in bridge_native_rtp, use tech_pvt instead of
bridge_pvt, reduce bridging attempts, and fix breaking native RTP bridges.
(closes issue ASTERISK-22128)
(closes issue ASTERISK-22104)
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@395866 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
bridges/bridge_native_rtp.c | 266 ++++++++++++++++++------------------
1 file changed, 132 insertions(+), 134 deletions(-)
diff --git a/bridges/bridge_native_rtp.c b/bridges/bridge_native_rtp.c
index 13351b2778..65d3f27193 100644
--- a/bridges/bridge_native_rtp.c
+++ b/bridges/bridge_native_rtp.c
@@ -46,47 +46,12 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/frame.h"
#include "asterisk/rtp_engine.h"
-/*! \brief Forward declarations for frame hook usage */
-static int native_rtp_bridge_join(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel);
-static void native_rtp_bridge_leave(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel);
-
/*! \brief Internal structure which contains information about bridged RTP channels */
struct native_rtp_bridge_data {
/*! \brief Framehook used to intercept certain control frames */
int id;
};
-/*! \brief Frame hook that is called to intercept hold/unhold */
-static struct ast_frame *native_rtp_framehook(struct ast_channel *chan, struct ast_frame *f, enum ast_framehook_event event, void *data)
-{
- RAII_VAR(struct ast_bridge *, bridge, NULL, ao2_cleanup);
-
- if (!f || (event != AST_FRAMEHOOK_EVENT_WRITE)) {
- return f;
- }
-
- ast_channel_lock(chan);
- bridge = ast_channel_get_bridge(chan);
- ast_channel_unlock(chan);
-
- /* It's safe for NULL to be passed to both of these, bridge_channel isn't used at all */
- if (bridge) {
- if (f->subclass.integer == AST_CONTROL_HOLD) {
- native_rtp_bridge_leave(ast_channel_internal_bridge(chan), NULL);
- } else if ((f->subclass.integer == AST_CONTROL_UNHOLD) || (f->subclass.integer == AST_CONTROL_UPDATE_RTP_PEER)) {
- native_rtp_bridge_join(ast_channel_internal_bridge(chan), NULL);
- }
- }
-
- return f;
-}
-
-/*! \brief Internal helper function which checks whether the channels are compatible with our native bridging */
-static int native_rtp_bridge_capable(struct ast_channel *chan)
-{
- return !ast_channel_has_audio_frame_or_monitor(chan);
-}
-
/*! \brief Internal helper function which gets all RTP information (glue and instances) relating to the given channels */
static enum ast_rtp_glue_result native_rtp_bridge_get(struct ast_channel *c0, struct ast_channel *c1, struct ast_rtp_glue **glue0,
struct ast_rtp_glue **glue1, struct ast_rtp_instance **instance0, struct ast_rtp_instance **instance1,
@@ -142,6 +107,130 @@ static enum ast_rtp_glue_result native_rtp_bridge_get(struct ast_channel *c0, st
return audio_glue0_res;
}
+/*! \brief Start RTP native bridging */
+static int native_rtp_bridge_start(struct ast_bridge *bridge)
+{
+ struct ast_bridge_channel *c0 = AST_LIST_FIRST(&bridge->channels);
+ struct ast_bridge_channel *c1 = AST_LIST_LAST(&bridge->channels);
+ enum ast_rtp_glue_result native_type;
+ struct ast_rtp_glue *glue0, *glue1;
+ struct ast_rtp_instance *instance0 = NULL, *instance1 = NULL, *vinstance0 = NULL;
+ struct ast_rtp_instance *vinstance1 = NULL, *tinstance0 = NULL, *tinstance1 = NULL;
+ RAII_VAR(struct ast_format_cap *, cap0, ast_format_cap_alloc_nolock(), ast_format_cap_destroy);
+ RAII_VAR(struct ast_format_cap *, cap1, ast_format_cap_alloc_nolock(), ast_format_cap_destroy);
+
+ if (c0 == c1) {
+ return 0;
+ }
+
+ native_type = native_rtp_bridge_get(c0->chan, c1->chan, &glue0, &glue1, &instance0, &instance1, &vinstance0, &vinstance1);
+
+ if (glue0->get_codec) {
+ glue0->get_codec(c0->chan, cap0);
+ }
+ if (glue1->get_codec) {
+ glue1->get_codec(c1->chan, cap1);
+ }
+
+ switch (native_type) {
+ case AST_RTP_GLUE_RESULT_LOCAL:
+ if (ast_rtp_instance_get_engine(instance0)->local_bridge) {
+ ast_rtp_instance_get_engine(instance0)->local_bridge(instance0, instance1);
+ }
+ if (ast_rtp_instance_get_engine(instance1)->local_bridge) {
+ ast_rtp_instance_get_engine(instance1)->local_bridge(instance1, instance0);
+ }
+ ast_rtp_instance_set_bridged(instance0, instance1);
+ ast_rtp_instance_set_bridged(instance1, instance0);
+ ast_debug(2, "Locally RTP bridged '%s' and '%s' in stack\n",
+ ast_channel_name(c0->chan), ast_channel_name(c1->chan));
+ break;
+
+ case AST_RTP_GLUE_RESULT_REMOTE:
+ glue0->update_peer(c0->chan, instance1, vinstance1, tinstance1, cap1, 0);
+ glue1->update_peer(c1->chan, instance0, vinstance0, tinstance0, cap0, 0);
+ ast_debug(2, "Remotely bridged '%s' and '%s' - media will flow directly between them\n",
+ ast_channel_name(c0->chan), ast_channel_name(c1->chan));
+ break;
+ case AST_RTP_GLUE_RESULT_FORBID:
+ break;
+ }
+
+ return 0;
+}
+
+/*! \brief Stop RTP native bridging */
+static void native_rtp_bridge_stop(struct ast_bridge *bridge)
+{
+ struct ast_bridge_channel *c0 = AST_LIST_FIRST(&bridge->channels);
+ struct ast_bridge_channel *c1 = AST_LIST_LAST(&bridge->channels);
+ enum ast_rtp_glue_result native_type;
+ struct ast_rtp_glue *glue0, *glue1 = NULL;
+ struct ast_rtp_instance *instance0 = NULL, *instance1 = NULL, *vinstance0 = NULL, *vinstance1 = NULL;
+
+ if (c0 == c1) {
+ return;
+ }
+
+ native_type = native_rtp_bridge_get(c0->chan, c1 ? c1->chan : NULL, &glue0, &glue1, &instance0, &instance1, &vinstance0, &vinstance1);
+
+ switch (native_type) {
+ case AST_RTP_GLUE_RESULT_LOCAL:
+ if (ast_rtp_instance_get_engine(instance0)->local_bridge) {
+ ast_rtp_instance_get_engine(instance0)->local_bridge(instance0, NULL);
+ }
+ if (instance1 && ast_rtp_instance_get_engine(instance1)->local_bridge) {
+ ast_rtp_instance_get_engine(instance1)->local_bridge(instance1, NULL);
+ }
+ ast_rtp_instance_set_bridged(instance0, NULL);
+ if (instance1) {
+ ast_rtp_instance_set_bridged(instance1, NULL);
+ }
+ break;
+ case AST_RTP_GLUE_RESULT_REMOTE:
+ glue0->update_peer(c0->chan, NULL, NULL, NULL, NULL, 0);
+ if (glue1) {
+ glue1->update_peer(c1->chan, NULL, NULL, NULL, NULL, 0);
+ }
+ break;
+ case AST_RTP_GLUE_RESULT_FORBID:
+ break;
+ }
+
+ ast_debug(2, "Discontinued RTP bridging of '%s' and '%s' - media will flow through Asterisk core\n",
+ ast_channel_name(c0->chan), ast_channel_name(c1->chan));
+}
+
+/*! \brief Frame hook that is called to intercept hold/unhold */
+static struct ast_frame *native_rtp_framehook(struct ast_channel *chan, struct ast_frame *f, enum ast_framehook_event event, void *data)
+{
+ RAII_VAR(struct ast_bridge *, bridge, NULL, ao2_cleanup);
+
+ if (!f || (event != AST_FRAMEHOOK_EVENT_WRITE)) {
+ return f;
+ }
+
+ ast_channel_lock(chan);
+ bridge = ast_channel_get_bridge(chan);
+ ast_channel_unlock(chan);
+
+ if (bridge) {
+ if (f->subclass.integer == AST_CONTROL_HOLD) {
+ native_rtp_bridge_stop(bridge);
+ } else if ((f->subclass.integer == AST_CONTROL_UNHOLD) || (f->subclass.integer == AST_CONTROL_UPDATE_RTP_PEER)) {
+ native_rtp_bridge_start(bridge);
+ }
+ }
+
+ return f;
+}
+
+/*! \brief Internal helper function which checks whether the channels are compatible with our native bridging */
+static int native_rtp_bridge_capable(struct ast_channel *chan)
+{
+ return !ast_channel_has_audio_frame_or_monitor(chan);
+}
+
static int native_rtp_bridge_compatible(struct ast_bridge *bridge)
{
struct ast_bridge_channel *c0 = AST_LIST_FIRST(&bridge->channels);
@@ -254,15 +343,7 @@ static int native_rtp_bridge_framehook_attach(struct ast_bridge_channel *bridge_
return -1;
}
-/*
- * BUGBUG The RTP native bridge technology should use tech_pvt not bridge_pvt.
- *
- * This technology needs to be reworked to not change the
- * tech_pvt of channels other than the one that is currently
- * entering/leaving before it can actually use the correct
- * pointer.
- */
- bridge_channel->bridge_pvt = data;
+ bridge_channel->tech_pvt = data;
return 0;
}
@@ -270,7 +351,7 @@ static int native_rtp_bridge_framehook_attach(struct ast_bridge_channel *bridge_
/*! \brief Helper function which removes frame hook from bridge channel */
static void native_rtp_bridge_framehook_detach(struct ast_bridge_channel *bridge_channel)
{
- RAII_VAR(struct native_rtp_bridge_data *, data, bridge_channel->bridge_pvt, ao2_cleanup);
+ RAII_VAR(struct native_rtp_bridge_data *, data, bridge_channel->tech_pvt, ao2_cleanup);
if (!data) {
return;
@@ -279,65 +360,17 @@ static void native_rtp_bridge_framehook_detach(struct ast_bridge_channel *bridge
ast_channel_lock(bridge_channel->chan);
ast_framehook_detach(bridge_channel->chan, data->id);
ast_channel_unlock(bridge_channel->chan);
- bridge_channel->bridge_pvt = NULL;
+ bridge_channel->tech_pvt = NULL;
}
static int native_rtp_bridge_join(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
{
- struct ast_bridge_channel *c0 = AST_LIST_FIRST(&bridge->channels);
- struct ast_bridge_channel *c1 = AST_LIST_LAST(&bridge->channels);
- enum ast_rtp_glue_result native_type;
- struct ast_rtp_glue *glue0, *glue1;
- struct ast_rtp_instance *instance0 = NULL, *instance1 = NULL, *vinstance0 = NULL;
- struct ast_rtp_instance *vinstance1 = NULL, *tinstance0 = NULL, *tinstance1 = NULL;
- RAII_VAR(struct ast_format_cap *, cap0, ast_format_cap_alloc_nolock(), ast_format_cap_destroy);
- RAII_VAR(struct ast_format_cap *, cap1, ast_format_cap_alloc_nolock(), ast_format_cap_destroy);
-
- native_rtp_bridge_framehook_detach(c0);
- if (native_rtp_bridge_framehook_attach(c0)) {
+ native_rtp_bridge_framehook_detach(bridge_channel);
+ if (native_rtp_bridge_framehook_attach(bridge_channel)) {
return -1;
}
- native_rtp_bridge_framehook_detach(c1);
- if (native_rtp_bridge_framehook_attach(c1)) {
- native_rtp_bridge_framehook_detach(c0);
- return -1;
- }
-
- native_type = native_rtp_bridge_get(c0->chan, c1->chan, &glue0, &glue1, &instance0, &instance1, &vinstance0, &vinstance1);
-
- if (glue0->get_codec) {
- glue0->get_codec(c0->chan, cap0);
- }
- if (glue1->get_codec) {
- glue1->get_codec(c1->chan, cap1);
- }
-
- switch (native_type) {
- case AST_RTP_GLUE_RESULT_LOCAL:
- if (ast_rtp_instance_get_engine(instance0)->local_bridge) {
- ast_rtp_instance_get_engine(instance0)->local_bridge(instance0, instance1);
- }
- if (ast_rtp_instance_get_engine(instance1)->local_bridge) {
- ast_rtp_instance_get_engine(instance1)->local_bridge(instance1, instance0);
- }
- ast_rtp_instance_set_bridged(instance0, instance1);
- ast_rtp_instance_set_bridged(instance1, instance0);
- ast_debug(2, "Locally RTP bridged '%s' and '%s' in stack\n",
- ast_channel_name(c0->chan), ast_channel_name(c1->chan));
- break;
-
- case AST_RTP_GLUE_RESULT_REMOTE:
- glue0->update_peer(c0->chan, instance1, vinstance1, tinstance1, cap1, 0);
- glue1->update_peer(c1->chan, instance0, vinstance0, tinstance0, cap0, 0);
- ast_debug(2, "Remotely bridged '%s' and '%s' - media will flow directly between them\n",
- ast_channel_name(c0->chan), ast_channel_name(c1->chan));
- break;
- case AST_RTP_GLUE_RESULT_FORBID:
- break;
- }
-
- return 0;
+ return native_rtp_bridge_start(bridge);
}
static void native_rtp_bridge_unsuspend(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
@@ -347,44 +380,9 @@ static void native_rtp_bridge_unsuspend(struct ast_bridge *bridge, struct ast_br
static void native_rtp_bridge_leave(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
{
- struct ast_bridge_channel *c0 = AST_LIST_FIRST(&bridge->channels) ? AST_LIST_FIRST(&bridge->channels) : bridge_channel;
- struct ast_bridge_channel *c1 = AST_LIST_LAST(&bridge->channels);
- enum ast_rtp_glue_result native_type;
- struct ast_rtp_glue *glue0, *glue1 = NULL;
- struct ast_rtp_instance *instance0 = NULL, *instance1 = NULL, *vinstance0 = NULL, *vinstance1 = NULL;
-
- native_rtp_bridge_framehook_detach(c0);
- if (c1) {
- native_rtp_bridge_framehook_detach(c1);
- }
-
- native_type = native_rtp_bridge_get(c0->chan, c1 ? c1->chan : NULL, &glue0, &glue1, &instance0, &instance1, &vinstance0, &vinstance1);
-
- switch (native_type) {
- case AST_RTP_GLUE_RESULT_LOCAL:
- if (ast_rtp_instance_get_engine(instance0)->local_bridge) {
- ast_rtp_instance_get_engine(instance0)->local_bridge(instance0, NULL);
- }
- if (instance1 && ast_rtp_instance_get_engine(instance1)->local_bridge) {
- ast_rtp_instance_get_engine(instance1)->local_bridge(instance1, NULL);
- }
- ast_rtp_instance_set_bridged(instance0, instance1);
- if (instance1) {
- ast_rtp_instance_set_bridged(instance1, instance0);
- }
- break;
- case AST_RTP_GLUE_RESULT_REMOTE:
- glue0->update_peer(c0->chan, NULL, NULL, NULL, NULL, 0);
- if (glue1) {
- glue1->update_peer(c1->chan, NULL, NULL, NULL, NULL, 0);
- }
- break;
- case AST_RTP_GLUE_RESULT_FORBID:
- break;
- }
+ native_rtp_bridge_framehook_detach(bridge_channel);
- ast_debug(2, "Discontinued RTP bridging of '%s' and '%s' - media will flow through Asterisk core\n",
- ast_channel_name(c0->chan), ast_channel_name(c1->chan));
+ native_rtp_bridge_stop(bridge);
}
static int native_rtp_bridge_write(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
--
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