[Openswan Users] l2tpd error when closing a connection- Peertried to disconnect with invalid TID

[Paul Freeman]

Apologies for replying to my own email but I thought I should follow it up
with something else I thought of.

Another possibility for the comparison failure is windows xp sp2 is sending
the incorrect TID value to l2tpd.  ie it is sending its local TID rather than
the remote (l2tpd) TID?

Paul

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EML Consulting Services Pty Ltd Telephone: +61 3 9836 1999
417-431 Canterbury Road Facsimile: +61 3 9836 0517
SURREY HILLS, VICTORIA 3127 Email: Paul.Freeman at eml.com.au
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>-----Original Message-----
>From: users-bounces at openswan.org [mailto:users-bounces at openswan.org] On
>Behalf Of Paul Freeman
>Sent: Friday, October 27, 2006 9:11 AM
>To: Paul Wouters; Michael Richardson
>Cc: users at openswan.org
>Subject: Re: [Openswan Users] l2tpd error when closing a connection-
>Peertried to disconnect with invalid TID
>
>Paul
>I have done some testing on the xl2tpd 1.04 disconnection problem and
>discovered the issue is in the comparison step (line 672) (which you
>already
>knew).
>
>If ((t->qtid != t->ourtid) && (t->ourtid > 0)) ...
>
>It appears to me the assignment of t->qtid and t->ourtid somewhere else in
>the code is incorrect or the comparison test itself is wrong as t->qtid <>
>t->ourtid.
>
>Not sure where else to look at this stage without reading through the code
>to
>try and understand it better than I do at the moment (which is very
>poorly:-)).
>
>I am keen to help if at all possible so if you have suggestions you would
>like me to test, please let me know.
>
>Regards
>
>Paul
>
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>EML Consulting Services Pty Ltd Telephone: +61 3 9836 1999
>417-431 Canterbury Road Facsimile: +61 3 9836 0517
>SURREY HILLS, VICTORIA 3127 Email: Paul.Freeman at eml.com.au
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>>-----Original Message-----
>>From: Paul Wouters [mailto:paul at xelerance.com]
>>Sent: Tuesday, October 24, 2006 1:46 AM
>>To: Paul Freeman; Paul Wouters; Michael Richardson
>>Cc: users at openswan.org
>>Subject: Re: [Openswan Users] l2tpd error when closing a connection- Peer
>>tried to disconnect with invalid TID
>>
>>On Mon, 23 Oct 2006, Paul Freeman wrote:
>>
>>> I am running openswan 2.4.6 and xl2tpd 1.0.4 (from Xelerance) on an
>IPCOP
>>
>>> Oct 23 12:04:53 firewall l2tpd[30017]: Connection established to
>>> xxx.xxx.xxx.xxx, 1701.  Local: 56119, Remote: 6.  LNS session is
>>'default'
>>>
>>> Oct 23 12:04:54 firewall l2tpd[30017]: Call established with
>>xxx.xxx.xxx.xxx,
>>> Local: 62656, Remote: 1, Serial: 0
>>>
>>> ...
>>>
>>> Oct 23 12:34:33 firewall l2tpd[30017]: control_finish: Peer tried to
>>> disconnect with invalid TID (6 != 56119)
>>>
>>> ...
>>>
>>> Oct 23 12:34:59 firewall l2tpd[30017]: Maximum retries exceeded for
>>tunnel
>>> 56119.  Closing.
>>>
>>> Oct 23 12:34:59 firewall l2tpd[30017]: Connection 6 closed to
>>> xxx.xxx.xxx.xxx, port 1701 (Timeout)
>>>
>>> Oct 23 12:35:04 firewall l2tpd[30017]: Unable to deliver closing message
>>for
>>> tunnel 56119. Destroying anyway.
>>
>>> Looking through previous posts on this topic by Jacco de Leeuw and
>others
>>I
>>> notice that the code in control.c in (x)l2tpd has been changed, swapping
>>to
>>> try and correct this.  However I still get the error.  Looking at the
>>values
>>> of the connection and tunnel ID's I notice that the connection and
>tunnel
>>> ID's are switched around, hence the error message.
>>
>>I will have a look at this. Did switching the arguments make your log
>>entries
>>go away?
>>
>>> Should I be getting this error in my situation?
>>
>>The error shouldn't be there, but currently we do get the error and ignore
>>it.
>>
>>> Is this a function of having xl2tpd listening on the internal IP address
>>or
>>> is there some other problem?
>>
>>No, that has nothing to do with it.
>>
>>Paul
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