RE: [Partysip-dev] Duplicate INVITE and BYE

[Pang, Thomas]

Hi Aymeric,

I have checked the traffic trace captured by Ethereal.
It indicates duplicate INVITE and ACK were sent.  I have checked
the timestamp between two consecutive INVITEs (or BYEs), they are
less than 3 seconds apart.  I have checked psp_core.c and the 
retransmission timeout is set to 5 seconds when calling pspm_tlp_execute.
It is set to 5 seconds because it is the default value suggested by
rfc2543.

Please look at the INVITEs and BYEs folked by partysip server 
(10.241.244.40).  The ip addresses of two user agents are 10.241.244.202 
and 10.241.244.58.

I will send you the traffic trace in a separate email.

Cheers,

Thomas



-----Original Message-----
From: Aymeric Moizard [mailto:address@hidden
Sent: Monday, December 23, 2002 12:51 AM
To: Pang, Thomas
Cc: 'address@hidden'
Subject: Re: [Partysip-dev] Duplicate INVITE and BYE



Possibly, the 2 INVITEs and 2 BYEs may just be 2 retransmissions.
This is because UDP is unreliable.

If you still think there is a bug, send me your call-flow.
Thanks
Aymeric

On Sun, 22 Dec 2002, Pang, Thomas wrote:

> Hi all,
>
> I am using partysip-0.5.0 with linphone-0.9.1.  Monitoring SIP messages
> using Ethereal,
> I realize that partysip folks INVITE and BYE twice.  Please see the
> following traffic trace:
>
> UA 1          Proxy           UA 2
>
> INVITE ----->
>        <----- Trying
>               Invite  ------>
>               Invite  ------>
>                       <------ Trying
>                       <------ Ringing
>        <----- Ringing
>                       <------ OK
>        <----- OK
> ACK    ------>
>
>        <----- RTP ------>
>
> BYE    ----->
>               BYE     ------>
>               BYE     ------>
>                       <------ OK
>        <----- OK
>
>
> Is it a bug or is there a reason of duplicating INVITE and BYE messages?
> Thanks.
>
> - Thomas
>
>
>
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