Merged revisions 274280 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r274280 | twilson | 2010-07-06 17:08:20 -0500 (Tue, 06 Jul 2010) | 9 lines
  
  Add option to not do a call forward on 482 Loop Detected
  
  Asterisk has always set up a forwarded call when receiving a 482 Loop Detected.
  This prevents handling the call failure by just continuing on in the dialplan.
  Since this would be a change in behavior, the new option to disable this
  behavior is forwardloopdetected which defaults to 'yes'.
  
  Review: https://reviewboard.asterisk.org/r/764/
........

(no option for trunk, just changing the behavior)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@274284 65c4cc65-6c06-0410-ace0-fbb531ad65f3

UPGRADE.txt

@@ -92,6 +92,10 @@ From 1.6.2 to 1.8:
   definition specifies those fields as float,double or similar they will now
   be logged with microsecond accuracy instead of a whole integer.
 
+* chan_sip will no longer set up a local call forward when receiving a
+  482 Loop Detected response. The dialplan will just continue from where it
+  left off.
+
 From 1.6.1 to 1.6.2:
 
 * SIP no longer sends the 183 progress message for early media by

channels/chan_sip.c

@@ -19132,16 +19132,7 @@ static void handle_response(struct sip_pvt *p, int resp, const char *rest, struc
 						ast_queue_control(p->owner, AST_CONTROL_BUSY);
 					}
 					break;
-				case 482: /*!
-					\note SIP is incapable of performing a hairpin call, which
-					is yet another failure of not having a layer 2 (again, YAY
-					 IETF for thinking ahead).  So we treat this as a call
-					 forward and hope we end up at the right place... */
-					ast_debug(1, "Hairpin detected, setting up call forward for what it's worth\n");
-					if (p->owner)
-						ast_string_field_build(p->owner, call_forward,
-								       "Local/%s@%s", p->username, p->context);
-					/* Fall through */
+				case 482: /* Loop Detected */
 				case 480: /* Temporarily Unavailable */
 				case 404: /* Not Found */
 				case 410: /* Gone */