[Serusers] Please help : how to disable losse routing ???

[Jiri Kuthan]

At 10:10 AM 9/9/2004, Nicolas RUIZ wrote:
>Thanks a lot for your help!
>
>I want really to use strict-routing because I have a UA in rfc3261, and when
>he make a call, he put the tag "LR" in the route fields of the ACK, and then
>the call is cut after 20s.
>
>Probably because my gateway Cisco (to PSTN) is only according to use RFC
>2543.

you are seeking error at a wrong place. SER's routing is compatible
with both loose and strict routing. I guess for some reason ACK
gets lost or is not accepted by Cisco.

-jiri


>That’s why I want the UA capably to work with IPTEL in strict routing.
>I have the same problem with an ATA Cisco, but I have put an old firmware,
>and that's work very good.  (CODE 3.1.1 (LR) >> CODE 3.1.0 (NO LR)).
>
>I have take the module rr_mod.c and after, how can I compile the module
>rr???
>
>Best Regards,
>
>Nicolas RUIZ. 
>
>-----Message d'origine-----
>De : Franz Edler [mailto:franz.edler at utanet.at] 
>Envoyé : jeudi 9 septembre 2004 06:09
>À : 'Martin Koenig [toplink-plannet GmbH]'; 'RUIZ Nicolas'
>Cc : serusers at lists.iptel.org
>Objet : RE: [Serusers] Please help : how to disable losse routing ???
>
>From: Martin Koenig [toplink-plannet GmbH] Sent: Wednesday, September 08, 
> 
>> this is not an SER problem. Loose routing is basically done in the end
>> devices. All you can control on the server is whether the server should be
>> in the signalling proxy chain (record_route()) and whether you want to
>> process route-header-fields (loose_route()) or forward to the final
>> destinanation directly (t_relay() without loose_route()).
>
>Sorry, this is not correct. The routing mechanism (loose or strict) has to
>be followed by SIP proxies. Look at RFC 3261 para 16.6 step 6 where the
>strict routing behavior is defined:
>"If the copy contains a Route header field, the proxy MUST inspect the URI
>in its first value. If that URI does not contain an lr parameter, the proxy
>MUST ..."
>
>But I expect that this behaviour is implemented in SER. In previous versions
>of SER there was the possibility to force SER to do only strict routing.
>This has been disabled now and in my previous comment I looked into the
>documentation which is not updated accordingly and still mentions the
>function strict_route(). But looking into the code of rr_mod.c you can read
>as a comment:
>"I do not want people to use strict routing so it is disabled by default,
>you should always use loose routing, if you really need strict routing then
>you can replace the last zeroes with REQUEST_ROUTE to enable strict_route
>and record_route_strict. Don't do that unless you know what you are really
>doing!"
>
>> As loose routing is the standard routing procedure as defined in RFC3261,
>> strict routing is obsolete.
>
>To be precise: strict routing is deprecated. If you have a strict router in
>a SIP router chain the proxy forwarding to a strict router has to be aware
>of this fact as mentioned above.
>
>
>From: RUIZ Nicolas  Sent: Wednesday, September 08, 2004 9:10 PM
>
>> When I put strict_route at the place of loose_route, I have an error.
>> (Module missing). Ser version is : 0.8.12.
>> What can I modify to apply strict routing only?
>
>Sorry I did not check that this previous function has been eliminated. But
>following the comment in rr_mod.c there is a possibility to force SER into
>strict routing (see above) behavior. Look into the code. Than you also have
>to use "record_route_strict" instead of "record_route".
>
>But I have heavy doubts that this will help your problems. Do you really
>know why you want to fall back to a deprecated routing behavior?
>
>Franz
>
>
>
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--
Jiri Kuthan            http://iptel.org/~jiri/