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bridge_native_rtp: Fix hold chain bugs caused by native RTP bridge framehook

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Issuing hold/unhold would lead to odd behavior. Between two chan_sip devices,
a hold could cause an endless chain of updates while with pjsip a similar chain
would begin but then end somewhat randomly. This patch fixes that by no longer
tweaking the RTP glue on both sides of the call for every
HOLD/UNHOLD/UPDATE_RTP_PEER frame.

(issue ASTERISK-22217)
Reported by: Matt Jordan
Review: https://reviewboard.asterisk.org/r/2794/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@397578 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Jonathan Rose
2013-08-23 19:05:20 +00:00
parent 6ebfac8e70
commit c13d0b7bdc
1 changed files with 41 additions and 15 deletions
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56
bridges/bridge_native_rtp.c
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@@ -112,8 +112,7 @@ 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)
static int native_rtp_bridge_start(struct ast_bridge *bridge, struct ast_channel *target)
{
struct ast_bridge_channel *c0 = AST_LIST_FIRST(&bridge->channels);
struct ast_bridge_channel *c1 = AST_LIST_LAST(&bridge->channels);
@@ -152,10 +151,26 @@ static int native_rtp_bridge_start(struct ast_bridge *bridge)
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));
/* If we have a target, it's the channel that received the UNHOLD or UPDATE_RTP_PEER frame and was told to resume */
if (!target) {
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));
} else {
/*
* If a target was provided, it is the recipient of an unhold or an update and needs to have
* its media redirected to fit the current remote bridging needs. The other channel is either
* already set up to handle the new media path or will have its own set of updates independent
* of this pass.
*/
if (c0->chan == target) {
glue0->update_peer(c0->chan, instance1, vinstance1, tinstance1, cap1, 0);
} else {
glue1->update_peer(c1->chan, instance0, vinstance0, tinstance0, cap0, 0);
}
}
break;
case AST_RTP_GLUE_RESULT_FORBID:
break;
@@ -164,8 +179,7 @@ static int native_rtp_bridge_start(struct ast_bridge *bridge)
return 0;
}
/*! \brief Stop RTP native bridging */
static void native_rtp_bridge_stop(struct ast_bridge *bridge)
static void native_rtp_bridge_stop(struct ast_bridge *bridge, struct ast_channel *target)
{
struct ast_bridge_channel *c0 = AST_LIST_FIRST(&bridge->channels);
struct ast_bridge_channel *c1 = AST_LIST_LAST(&bridge->channels);
@@ -193,9 +207,21 @@ static void native_rtp_bridge_stop(struct ast_bridge *bridge)
}
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);
if (!target) {
glue0->update_peer(c0->chan, NULL, NULL, NULL, NULL, 0);
if (glue1) {
glue1->update_peer(c1->chan, NULL, NULL, NULL, NULL, 0);
}
} else {
/*
* If a target was provided, it is being put on hold and should expect to
* receive mediafrom sterisk instead of what it was previously connected to.
*/
if (c0->chan == target) {
glue0->update_peer(c0->chan, NULL, NULL, NULL, NULL, 0);
} else if (glue1) {
glue1->update_peer(c1->chan, NULL, NULL, NULL, NULL, 0);
}
}
break;
case AST_RTP_GLUE_RESULT_FORBID:
@@ -221,9 +247,9 @@ static struct ast_frame *native_rtp_framehook(struct ast_channel *chan, struct a
if (bridge) {
if (f->subclass.integer == AST_CONTROL_HOLD) {
native_rtp_bridge_stop(bridge);
native_rtp_bridge_stop(bridge, chan);
} else if ((f->subclass.integer == AST_CONTROL_UNHOLD) || (f->subclass.integer == AST_CONTROL_UPDATE_RTP_PEER)) {
native_rtp_bridge_start(bridge);
native_rtp_bridge_start(bridge, chan);
}
}
@@ -375,7 +401,7 @@ static int native_rtp_bridge_join(struct ast_bridge *bridge, struct ast_bridge_c
return -1;
}
return native_rtp_bridge_start(bridge);
return native_rtp_bridge_start(bridge, NULL);
}
static void native_rtp_bridge_unsuspend(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
@@ -387,7 +413,7 @@ static void native_rtp_bridge_leave(struct ast_bridge *bridge, struct ast_bridge
{
native_rtp_bridge_framehook_detach(bridge_channel);
native_rtp_bridge_stop(bridge);
native_rtp_bridge_stop(bridge, NULL);
}
static int native_rtp_bridge_write(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)