Re: [GnomeMeeting-devel-list] register/cancel breakage

[Damien Sandras <dsandras seconix com>]

Le samedi 18 mars 2006 à 23:44 +1030, Geoffrey D. Bennett a écrit :
> Hi there,
> 
> There seem to be some oddities in Ekiga's register/cancel handling.
> This is on startup:
> 
> First transmit of REGISTER message:
> 
> 2006/03/18 23:33:15.392   0:02.548      GMAccounts...t:0a36bee0 SIP     Sending PDU on udp$203.16.231.11:5060<if=udp$203.16.231.153:5061>
> REGISTER sip:alice.netcraft.com.au SIP/2.0
> CSeq: 1 REGISTER
> Via: SIP/2.0/UDP 203.16.231.153:5061;branch=z9hG4bKdcfb2c3b-edb4-da11-9266-001125d23952;rport
> [...]
> 2006/03/18 23:33:15.395   0:02.551        SIP Transport:a403fa8 SIP     Read thread started.
> 2006/03/18 23:33:15.395   0:02.551        SIP Transport:a403fa8 SIP     Waiting for PDU on udp$203.16.231.11:5060<if=udp$203.16.231.153:5061>
> 
> Retransmit:
> 
> 2006/03/18 23:33:15.441   0:02.597                  Housekeeper SIP     Transaction 1 REGISTER timeout, making retry 1
> 2006/03/18 23:33:15.442   0:02.598                  Housekeeper SIP     Sending PDU on udp$203.16.231.11:5060<if=udp$203.16.231.153:5061>
> REGISTER sip:alice.netcraft.com.au SIP/2.0
> CSeq: 1 REGISTER
> Via: SIP/2.0/UDP 203.16.231.153:5061;branch=z9hG4bKdcfb2c3b-edb4-da11-9266-001125d23952;rport
> 
> 407 from server:
> 
> 2006/03/18 23:33:15.675   0:02.831        SIP Transport:a403fa8 SIP     PDU Received on udp$203.16.231.11:5060<if=udp$203.16.231.153:5061>
> SIP/2.0 407 Proxy Authentication Required
> Date: Sat, 18 Mar 2006 13:03:21 GMT
> CSeq: 1 REGISTER
> Via: SIP/2.0/UDP 203.16.231.153:5061;branch=z9hG4bKdcfb2c3b-edb4-da11-9266-001125d23952;rport=5061;received=203.16.231.153:5061
> 
> REGISTER with credentials:
> 
> 2006/03/18 23:33:15.675   0:02.831        SIP Transport:a403fa8 SIP     Transaction 1 REGISTER completed.
> 2006/03/18 23:33:15.675   0:02.831        SIP Transport:a403fa8 OpalUDP Ended connect, selecting 203.16.231.153:5061
> 2006/03/18 23:33:15.675   0:02.831        SIP Transport:a403fa8 SIP     Received Proxy Authentication Required response
> 2006/03/18 23:33:15.676   0:02.832        SIP Transport:a403fa8 SIP     Adding authentication information
> 2006/03/18 23:33:15.677   0:02.833        SIP Transport:a403fa8 SIP     Sending PDU on udp$203.16.231.11:5060<if=udp$203.16.231.153:5061>
> REGISTER sip:alice.netcraft.com.au SIP/2.0
> CSeq: 2 REGISTER
> Via: SIP/2.0/UDP 203.16.231.153:5061;branch=z9hG4bK06a1583b-edb4-da11-9266-001125d23952;rport
> 
> Duplicate 407 from server (because of the retransmit):
> 
> 2006/03/18 23:33:15.677   0:02.833        SIP Transport:a403fa8 SIP     Waiting for PDU on udp$203.16.231.11:5060<if=udp$203.16.231.153:5061>
> 2006/03/18 23:33:15.755   0:02.911        SIP Transport:a403fa8 SIP     PDU Received on udp$203.16.231.11:5060<if=udp$203.16.231.153:5061>
> SIP/2.0 407 Proxy Authentication Required
> Date: Sat, 18 Mar 2006 13:03:22 GMT
> CSeq: 1 REGISTER
> Via: SIP/2.0/UDP 203.16.231.153:5061;branch=z9hG4bKdcfb2c3b-edb4-da11-9266-001125d23952;rport=5061;received=203.16.231.153:5061
> 
> Then it gets weird -- Ekiga sends a CANCEL for the REGISTER that had
> the credentials?!
> 
> 2006/03/18 23:33:15.755   0:02.911        SIP Transport:a403fa8 SIP     Transaction 1 REGISTER completed.
> 2006/03/18 23:33:15.756   0:02.912        SIP Transport:a403fa8 SIP     Sending PDU on udp$203.16.231.11:5060<if=udp$203.16.231.153:5061>
> CANCEL sip:alice.netcraft.com.au SIP/2.0
> CSeq: 2 CANCEL
> Via: SIP/2.0/UDP 203.16.231.153:5061;branch=z9hG4bK06a1583b-edb4-da11-9266-001125d23952;rport
> 
> The server responds to the REGISTER:
> 
> 2006/03/18 23:33:16.161   0:03.317        SIP Transport:a403fa8 SIP     PDU Received on udp$203.16.231.11:5060<if=udp$203.16.231.153:5061>
> SIP/2.0 200 OK
> Date: Sat, 18 Mar 2006 13:03:22 GMT
> CSeq: 2 REGISTER
> Via: SIP/2.0/UDP 203.16.231.153:5061;branch=z9hG4bK06a1583b-edb4-da11-9266-001125d23952;rport=5061;received=203.16.231.153:5061
> 
> Ekiga shows that the user is logged in now, but RFC 3261 Section 9.1
> says "A CANCEL request SHOULD NOT be sent to cancel a request other
> than INVITE."  I'm not sure what the purpose of trying to CANCEL that
> REGISTER is anyway?
> 

It had been like that in OPAL since years, and I left it like it was. I
do not think it is not compliant, the RFC says "SHOULD NOT", not "MUST
NOT".

However, I think it would be good if I removed it.
Can you double-check that and post a bug report (ideally with a patch)?

Thanks,
-- 
 _      Damien Sandras
(o-     
//\     Ekiga Softphone: http://www.ekiga.org/
v_/_    FOSDEM 2006    : http://www.fosdem.org/
        SIP Phone      : sip:dsandras ekiga net
                         sip:600000 ekiga net