[asterisk-bugs] [Asterisk 0012951]: [patch] Busy / Congestion responses are not sent reliably

[noreply at bugs.digium.com]

The following issue has been UPDATED. 
====================================================================== 
http://bugs.digium.com/view.php?id=12951 
====================================================================== 
Reported By:                tsearle
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   12951
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
Asterisk Version:           SVN 
SVN Branch (only for SVN checkouts, not tarball releases):  1.4  
SVN Revision (number only!): 126511 
Disclaimer on File?:        N/A 
Request Review:              
====================================================================== 
Date Submitted:             06-30-2008 05:40 CDT
Last Modified:              06-30-2008 05:40 CDT
====================================================================== 
Summary:                    [patch] Busy / Congestion responses are not sent
reliably
Description: 
I have observed the following issue in asterisk.

Client          Asterisk
  |----INVITE----->|
  |<--100 Trying---|
  | (lost)486 Busy-|
  |(Invite Timeout)|

upon looking at the code I see that asterisk in the sip_indicate method
sends the final responses unreliably and goes directly to the.


This issue can be reproduced with the following dialing plan

exten => 5555,1,Busy()  and a sipp script simulating packet loss on the
486 Busy


patch to resolve this issue is provided.
====================================================================== 

Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
06-30-08 05:40  tsearle        Summary                  Busy / Congestion
responses are not sent reliably => [patch] Busy / Congestion responses are not
sent reliably
======================================================================