(closes issue #11849)

Reported by: greyvoip
Tested by: murf

OK, a few days of debugging, a bunch of instrumentation
in chan_sip, main/channel.c, main/pbx.c, etc. and 5 solid 
notebook pages of notes later, I  have made the small
tweek necc. to get the start time right on the second 
CDR when:

  A Calls B
  B answ.
  A hits Xfer button on sip phone,
  A dials C and hits the OK button,
  A hangs up
  C answers ringing phone
  B and C converse
  B and/or C hangs up

But does not harm the scenario where:

  A Calls B
  B answ.
  B hits xfer button on sip phone,
  B dials C and hits the OK button,
  B hangs up
  C answers ringing phone
  A and C converse
  A and/or C hangs up

The difference in start times on the second CDR is because
of a Masquerade on the B channel when the xfer number is 
sent. It ends up replacing the CDR on the B channel with
a duplicate, which ends up getting tossed out. We keep 
a pointer to the first CDR, and update *that* after the
bridge closes. But, only if the CDR has changed.

I hope this change is specific enough not to muck
up any current CDR-based apps. In my defence, I 
assert that the previous information was wrong,
and this change fixes it, and possibly other
similar scenarios.

I wonder if I should be doing the same thing
for the channel, as I did for the peer, but
I can't think of a scenario this might affect.
I leave it, then, as an exersize for the users,
to find the scenario where the chan's CDR 
changes and loses the proper start time.



git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.4@134883 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 14 insertions, 5 deletions

diff --git a/res/res_features.c b/res/res_features.c
index d1a481eee..e326a8960 100644
--- a/res/res_features.c
+++ b/res/res_features.c
@@ -1405,6 +1405,7 @@ int ast_bridge_call(struct ast_channel *chan,struct ast_channel *peer,struct ast
 	struct ast_option_header *aoh;
 	struct ast_bridge_config backup_config;
 	struct ast_cdr *bridge_cdr = NULL;
+	struct ast_cdr *orig_peer_cdr = NULL;
 
 	memset(&backup_config, 0, sizeof(backup_config));
 
@@ -1442,6 +1443,7 @@ int ast_bridge_call(struct ast_channel *chan,struct ast_channel *peer,struct ast
 
 	ast_copy_string(orig_channame,chan->name,sizeof(orig_channame));
 	ast_copy_string(orig_peername,peer->name,sizeof(orig_peername));
+	orig_peer_cdr = peer->cdr;
 	
 	if (!chan->cdr || (chan->cdr && !ast_test_flag(chan->cdr, AST_CDR_FLAG_POST_DISABLED))) {
 			
@@ -1476,8 +1478,9 @@ int ast_bridge_call(struct ast_channel *chan,struct ast_channel *peer,struct ast
 		ast_cdr_answer(bridge_cdr);
 		ast_cdr_answer(chan->cdr); /* for the sake of cli status checks */
 		ast_set_flag(chan->cdr, AST_CDR_FLAG_BRIDGED);
-		if (peer->cdr)
+		if (peer->cdr) {
 			ast_set_flag(peer->cdr, AST_CDR_FLAG_BRIDGED);
+		}
 	}
 	
 	for (;;) {
@@ -1652,12 +1655,18 @@ int ast_bridge_call(struct ast_channel *chan,struct ast_channel *peer,struct ast
 		ast_cdr_detach(bridge_cdr);
 		
 		/* just in case, these channels get bridged again before hangup */
-		if (chan->cdr)
+		if (chan->cdr) {
 			ast_cdr_specialized_reset(chan->cdr,0);
-		if (peer->cdr)
-			ast_cdr_specialized_reset(peer->cdr,0);
+		}
+		if (peer->cdr) {
+			if (orig_peer_cdr && peer->cdr != orig_peer_cdr) {
+				/* this can only happen if there was a transfer, methinks */
+				ast_cdr_specialized_reset(orig_peer_cdr,0);
+			} else {
+				ast_cdr_specialized_reset(peer->cdr,0);
+			}
+		}
 	}
-	
 	return res;
 }