From c6585e5b5d8679cdb2b258145455606c23e217bb Mon Sep 17 00:00:00 2001
From: "Kevin P. Fleming" <kpfleming@digium.com>
Date: Wed, 5 Mar 2008 15:40:40 +0000
Subject: Merged revisions 106038 via svnmerge from
 https://origsvn.digium.com/svn/asterisk/branches/1.4

........
r106038 | kpfleming | 2008-03-05 09:32:35 -0600 (Wed, 05 Mar 2008) | 7 lines

when a PRI call must be moved to a different B channel at the request of the other endpoint, ensure that any DSP active on the original channel is moved to the new one

(closes issue #11917)
Reported by: mavetju
Tested by: mavetju


........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@106040 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 channels/chan_zap.c | 39 +++++++++++++++++++++++----------------
 1 file changed, 23 insertions(+), 16 deletions(-)

diff --git a/channels/chan_zap.c b/channels/chan_zap.c
index 8f32a6e24..9e73eeffd 100644
--- a/channels/chan_zap.c
+++ b/channels/chan_zap.c
@@ -9811,29 +9811,36 @@ static int pri_fixup_principle(struct zt_pri *pri, int principle, q931_call *c)
 		if (pri->pvts[x]->call == c) {
 			/* Found our call */
 			if (principle != x) {
+				struct zt_pvt *new = pri->pvts[principle], *old = pri->pvts[x];
+
 				ast_verb(3, "Moving call from channel %d to channel %d\n",
-						pri->pvts[x]->channel, pri->pvts[principle]->channel);
-				if (pri->pvts[principle]->owner) {
+					 old->channel, new->channel);
+				if (new->owner) {
 					ast_log(LOG_WARNING, "Can't fix up channel from %d to %d because %d is already in use\n",
-						pri->pvts[x]->channel, pri->pvts[principle]->channel, pri->pvts[principle]->channel);
+						old->channel, new->channel, new->channel);
 					return -1;
 				}
 				/* Fix it all up now */
-				pri->pvts[principle]->owner = pri->pvts[x]->owner;
-				if (pri->pvts[principle]->owner) {
-					ast_string_field_build(pri->pvts[principle]->owner, name, 
+				new->owner = old->owner;
+				old->owner = NULL;
+				if (new->owner) {
+					ast_string_field_build(new->owner, name, 
 							       "Zap/%d:%d-%d", pri->trunkgroup,
-							       pri->pvts[principle]->channel, 1);
-					pri->pvts[principle]->owner->tech_pvt = pri->pvts[principle];
-					ast_channel_set_fd(pri->pvts[principle]->owner, 0, pri->pvts[principle]->subs[SUB_REAL].zfd);
-					pri->pvts[principle]->subs[SUB_REAL].owner = pri->pvts[x]->subs[SUB_REAL].owner;
+							       new->channel, 1);
+					new->owner->tech_pvt = new;
+					ast_channel_set_fd(new->owner, 0, new->subs[SUB_REAL].zfd);
+					new->subs[SUB_REAL].owner = old->subs[SUB_REAL].owner;
+					old->subs[SUB_REAL].owner = NULL;
 				} else
-					ast_log(LOG_WARNING, "Whoa, there's no  owner, and we're having to fix up channel %d to channel %d\n", pri->pvts[x]->channel, pri->pvts[principle]->channel);
-				pri->pvts[principle]->call = pri->pvts[x]->call;
-				/* Free up the old channel, now not in use */
-				pri->pvts[x]->subs[SUB_REAL].owner = NULL;
-				pri->pvts[x]->owner = NULL;
-				pri->pvts[x]->call = NULL;
+					ast_log(LOG_WARNING, "Whoa, there's no  owner, and we're having to fix up channel %d to channel %d\n", old->channel, new->channel);
+				new->call = old->call;
+				old->call = NULL;
+
+				/* Copy any DSP that may be present */
+				new->dsp = old->dsp;
+				new->dsp_features = old->dsp_features;
+				old->dsp = NULL;
+				old->dsp_features = 0;
 			}
 			return principle;
 		}
-- 
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