From a1bb3f113e8caba9e1da8ecdeef7f41850d67f92 Mon Sep 17 00:00:00 2001
From: Joshua Colp <jcolp@digium.com>
Date: Thu, 4 Oct 2012 17:44:38 +0000
Subject: [PATCH] Fix a regression from direct media ACLs where the
 directrtpsetup option no longer works.

A check was added for direct media ACLs that immediately forbid remote bridging if there
was no bridged channel. This caused directrtpsetup to no longer function as it needs this
information before bridging actually occurs.

Logic has now been adjusted so if there is no bridged channel a remote bridge will still
be attempted.

(closes issue ASTERISK-20511)
Reported by: kristoff

Review: https://reviewboard.asterisk.org/r/2146/
........

Merged revisions 374456 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/10@374457 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 channels/chan_sip.c | 54 +++++++++++++++++++++++++--------------------
 1 file changed, 30 insertions(+), 24 deletions(-)

diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index 7adcad1ec9..a6a557f800 100644
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -30320,22 +30320,22 @@ static enum ast_rtp_glue_result sip_get_rtp_peer(struct ast_channel *chan, struc
 		return AST_RTP_GLUE_RESULT_FORBID;
 	}
 
-	if (!(opp_chan = ast_bridged_channel(chan))) {
-		return AST_RTP_GLUE_RESULT_FORBID;
-	} else if (((opp_chan->tech != &sip_tech) && (opp_chan->tech != &sip_tech_info)) ||
-		   (!(opp = opp_chan->tech_pvt))) {
+	if ((opp_chan = ast_bridged_channel(chan)) && (((opp_chan->tech != &sip_tech) && (opp_chan->tech != &sip_tech_info)) ||
+						       (!(opp = opp_chan->tech_pvt)))) {
 		return AST_RTP_GLUE_RESULT_FORBID;
 	}
 
 	sip_pvt_lock(p);
-	while (sip_pvt_trylock(opp)) {
+	while (opp && sip_pvt_trylock(opp)) {
 		sip_pvt_unlock(p);
 		usleep(1);
 		sip_pvt_lock(p);
 	}
 
 	if (!(p->rtp)) {
-		sip_pvt_unlock(opp);
+		if (opp) {
+			sip_pvt_unlock(opp);
+		}
 		sip_pvt_unlock(p);
 		return AST_RTP_GLUE_RESULT_FORBID;
 	}
@@ -30345,7 +30345,7 @@ static enum ast_rtp_glue_result sip_get_rtp_peer(struct ast_channel *chan, struc
 
 	if (ast_test_flag(&p->flags[0], SIP_DIRECT_MEDIA)) {
 		res = AST_RTP_GLUE_RESULT_REMOTE;
-		if (!apply_directmedia_ha(p, opp, "audio")) {
+		if (opp && !apply_directmedia_ha(p, opp, "audio")) {
 			res = AST_RTP_GLUE_RESULT_FORBID;
 		}
 	} else if (ast_test_flag(&p->flags[0], SIP_DIRECT_MEDIA_NAT)) {
@@ -30354,7 +30354,9 @@ static enum ast_rtp_glue_result sip_get_rtp_peer(struct ast_channel *chan, struc
 		res = AST_RTP_GLUE_RESULT_FORBID;
 	}
 
-	sip_pvt_unlock(opp);
+	if (opp) {
+		sip_pvt_unlock(opp);
+	}
 
 	if (p->srtp) {
 		res = AST_RTP_GLUE_RESULT_FORBID;
@@ -30376,22 +30378,22 @@ static enum ast_rtp_glue_result sip_get_vrtp_peer(struct ast_channel *chan, stru
 		return AST_RTP_GLUE_RESULT_FORBID;
 	}
 
-	if (!(opp_chan = ast_bridged_channel(chan))) {
-		return AST_RTP_GLUE_RESULT_FORBID;
-	} else if (((opp_chan->tech != &sip_tech) && (opp_chan->tech != &sip_tech_info)) ||
-		   (!(opp = opp_chan->tech_pvt))) {
+	if ((opp_chan = ast_bridged_channel(chan)) && (((opp_chan->tech != &sip_tech) && (opp_chan->tech != &sip_tech_info)) ||
+						       (!(opp = opp_chan->tech_pvt)))) {
 		return AST_RTP_GLUE_RESULT_FORBID;
 	}
 
 	sip_pvt_lock(p);
-	while (sip_pvt_trylock(opp)) {
+	while (opp && sip_pvt_trylock(opp)) {
 		sip_pvt_unlock(p);
 		usleep(1);
 		sip_pvt_lock(p);
 	}
 
 	if (!(p->vrtp)) {
-		sip_pvt_unlock(opp);
+		if (opp) {
+			sip_pvt_unlock(opp);
+		}
 		sip_pvt_unlock(p);
 		return AST_RTP_GLUE_RESULT_FORBID;
 	}
@@ -30401,12 +30403,14 @@ static enum ast_rtp_glue_result sip_get_vrtp_peer(struct ast_channel *chan, stru
 
 	if (ast_test_flag(&p->flags[0], SIP_DIRECT_MEDIA)) {
 		res = AST_RTP_GLUE_RESULT_REMOTE;
-		if (!apply_directmedia_ha(p, opp, "video")) {
+		if (opp && !apply_directmedia_ha(p, opp, "video")) {
 			res = AST_RTP_GLUE_RESULT_FORBID;
 		}
 	}
 
-	sip_pvt_unlock(opp);
+	if (opp) {
+		sip_pvt_unlock(opp);
+	}
 	sip_pvt_unlock(p);
 
 	return res;
@@ -30423,22 +30427,22 @@ static enum ast_rtp_glue_result sip_get_trtp_peer(struct ast_channel *chan, stru
 		return AST_RTP_GLUE_RESULT_FORBID;
 	}
 
-	if (!(opp_chan = ast_bridged_channel(chan))) {
-		return AST_RTP_GLUE_RESULT_FORBID;
-	} else if (((opp_chan->tech != &sip_tech) && (opp_chan->tech != &sip_tech_info)) ||
-		   (!(opp = opp_chan->tech_pvt))) {
+	if ((opp_chan = ast_bridged_channel(chan)) && (((opp_chan->tech != &sip_tech) && (opp_chan->tech != &sip_tech_info)) ||
+						       (!(opp = opp_chan->tech_pvt)))) {
 		return AST_RTP_GLUE_RESULT_FORBID;
 	}
 
 	sip_pvt_lock(p);
-	while (sip_pvt_trylock(opp)) {
+	while (opp && sip_pvt_trylock(opp)) {
 		sip_pvt_unlock(p);
 		usleep(1);
 		sip_pvt_lock(p);
 	}
 
 	if (!(p->trtp)) {
-		sip_pvt_unlock(opp);
+		if (opp) {
+			sip_pvt_unlock(opp);
+		}
 		sip_pvt_unlock(p);
 		return AST_RTP_GLUE_RESULT_FORBID;
 	}
@@ -30448,12 +30452,14 @@ static enum ast_rtp_glue_result sip_get_trtp_peer(struct ast_channel *chan, stru
 
 	if (ast_test_flag(&p->flags[0], SIP_DIRECT_MEDIA)) {
 		res = AST_RTP_GLUE_RESULT_REMOTE;
-		if (!apply_directmedia_ha(p, opp, "text")) {
+		if (opp && !apply_directmedia_ha(p, opp, "text")) {
 			res = AST_RTP_GLUE_RESULT_FORBID;
 		}
 	}
 
-	sip_pvt_unlock(opp);
+	if (opp) {
+		sip_pvt_unlock(opp);
+	}
 	sip_pvt_unlock(p);
 
 	return res;