[reSIProcate] prack sent in response to provisional even if prack support is disabled

[Justin Matthews]

Sorry, this appears to be fixed in rev 7227 of invitesession.cxx.

-justin

-----Original Message-----
From: Justin Matthews [mailto:jmatthewsr at gmail.com] 
Sent: Tuesday, November 13, 2007 11:44 AM
To: 'resiprocate-devel at list.resiprocate.org'
Subject: prack sent in response to provisional even if prack support is
disabled

Hi,

Prack support is not enabled (did not enable it in the master profile), but
the following scenario causes resip/dum to send a prack to a 183:

DUM (UAC)						UAS
1) INVITE ->(does not contain Supported: 100rel)
2) 183 (contains Supported: 100rel) <-
3) PRACK (RAck: 0 0 UNKNOWN)->
.

The UAS fails on the PRACK.  Is resip/dum behaving correctly?  How would
this behavior be changed to not send the PRACK?  InviteSession::isReliable
only checks the profile if the message is a request to determine if prack is
supported.  This probably assumes that if a response contains the Supported:
100rel, then the Supported: 100rel must have been sent in the initial
INVITE?

Thanks,

-Justin

1) 
INVITE sip:13101234567 at 192.168.2.41:5060 SIP/2.0
Via: SIP/2.0/UDP
192.168.2.31:5060;branch=z9hG4bK-d8754z-c93595140268b620-1---d8754z-;rport
Max-Forwards: 70
Contact: <sip:6 at 192.168.2.31:5060>
To: <sip:13101234567 at 192.168.2.41:5060>
From: "0309"<sip:6 at 192.168.2.31>;tag=1c0b8f57
Call-ID: 00075027-b9dd0026-14e75433-73d133a6 at 192.168.2.6-2
CSeq: 1 INVITE
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, INFO, NOTIFY, REGISTER

2)
SIP/2.0 183 Ringing
Via: SIP/2.0/UDP
192.168.2.31:5060;branch=z9hG4bK-d8754z-c93595140268b620-1---d8754z-;rport
From: "0309"<sip:6 at 192.168.2.31>;tag=1c0b8f57
To: <sip:13101234567 at 192.168.2.41:5060>;tag=6608SIPpTag0171
Call-ID: 00075027-b9dd0026-14e75433-73d133a6 at 192.168.2.6-2
CSeq: 1 INVITE
Supported: 100rel
Contact: <sip:192.168.2.41:5060;transport=UDP>

3)
PRACK sip:192.168.2.41:5060;transport=UDP SIP/2.0
Via: SIP/2.0/UDP
192.168.2.31:5060;branch=z9hG4bK-d8754z-d74a3f6e45648638-1---d8754z-;rport
Max-Forwards: 70
Contact: <sip:6 at 192.168.2.31:5060>
To: <sip:13101234567 at 192.168.2.41:5060>;tag=6608SIPpTag0171
From: "0309"<sip:6 at 192.168.2.31>;tag=1c0b8f57
Call-ID: 00075027-b9dd0026-14e75433-73d133a6 at 192.168.2.6-2
CSeq: 2 PRACK
RAck: 0 0 UNKNOWN
Content-Length: 0