[SR-Users] TOPOS + RE-INVITE problem - Contact IP not updated

[Patrick Karton]

Hello,

try to apply this setting for topos module.

modparam("topos", "contact_mode", 0)

10.10.70.70 does not put the full contact uri in the R-INVITE.

try put contact_mode to 0 (and not 1 or 2).

________________________________
De : sr-users <sr-users-bounces at lists.kamailio.org> de la part de c c <c at netcontrol.fr>
Envoyé : lundi 23 mai 2022 08:38
À : sr-users at lists.kamailio.org <sr-users at lists.kamailio.org>
Objet : [SR-Users] TOPOS + RE-INVITE problem - Contact IP not updated


It seems that TOPOS is not working properly on RE-INVITE and stop masking IP and contact on some RE-INVITE.

When a RE-INVITE is send with Kamailio IP as Request-URI TOPOS is not operating.


Note : we are using the HTABLE trick to rewrite $ru and match the call but we would need to have TOPOS re-evaluating the dialog once done.


We use a standard configuration with 2 modifications.

  1.  in route[DISPATCH] to set the HTABLE

if(is_method("INVITE")) {
 $sht(ct=>$ci::$ft) = $sel(contact.uri);
}


  1.  in route[WITHINDLG] to find the call if R-URI = myself

if(has_totag() && uri==myself) {
 if($sht(ct=>$ci::$ft) != $null && $T_reply_code > 400) $shtex(ct=>$ci::$ft) = 10 ;
  if($sht(ct=>$ci::$tt) != $null) {
     $ru = $sht(ct=>$ci::$tt);
     if (is_method("BYE")) $shtex(ct=>$ci::$tt) = 10 ;
     route(RELAY);
  }
}


As you can see in the PCAP the RE-INVITE goes directly to calling stating with the Contact not updated and the 200 OK is also sent to called party with wrong Contact info too.

<https://github.com/kamailio/kamailio/files/8730489/topos-issue.zip>


This behavior breaks the BYE procedure.


Any advice ?


Chris
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