I think you might be working too hard. :-) 1. Automatic stateful reversion of From and To header modifications is available in the `uac` module:
https://kamailio.org/docs/modules/5.6.x/modules/uac.html#uac.p.rr_from_store_param https://kamailio.org/docs/modules/5.6.x/modules/uac.html#uac.p.restore_mode https://kamailio.org/docs/modules/5.6.x/modules/uac.html#uac.p.restore_dlg If you are already using these, then disregard. But if you're not, they will take care of the reversion for you so you don't have to manually mangle any replies or in-dialog requests. 2. R-URI is not present in replies, so this should not be relevant; 3. Most other one-way message changes specific to a given carrier or other gateway destination can be done in branch_route, in which case the reversion to the original value is automatic when attempting another destination. For example: request_route { ... # $rU = '999'; if(method === "INVITE") { $du = "sip:1.1.1.1:5060"; t_on_branch("MODIFY"); t_on_failure("NEXT_ONE"); t_relay(); exit; } } branch_route[MODIFY] { if($nh(d) eq "1.1.1.1") $rU = '+999'; } This '+999' value will be reverted when NEXT_ONE creates another branch. -- Alex > On Jan 20, 2023, at 10:06 AM, Benoît Panizzon <benoit.paniz...@imp.ch> wrote: > > Hi Alex > >> I'm not familiar with this latter usage of the dialog module. Could >> you explain that further? > > That is not a module. We use the dlg_vars to store a lot of > information. I would love if there was a module taking care of symmetric > number translations in all messages. I think this is a common task. > > Consider this situation (intentionally using invalid prefixes) > > Interconnection uses e164 Numbers. eg: +41661234567 for > Switzerland and we use NPRN (number portability routing prefixes) > numbers to route ported numbers. > Customer uses 'national' notation of same number: 0661234567 > > Call from Customer: > > RURI: 0661234567 (this is ported to NPRN 99052) > From: 0667776655 > > Call towards IC therefore has to be: > > RURI: +4199052661234567 > From: +4166776655 > > So I store the original FROM and RURI in dlg_variables so I can put > them back in the appropriate header when passing a RINGING or 200 OK > back to the customer. > > Even more important. When there is a Privacy: ID Header present: I (by > OFCOM regulations MUST) replace $fu and $fn with 'Anonymous' towards the > customer. And of course also the Contact: Username and possibly remove > PAI, PPI or whatever the customer does not need to get. But I might > want to send him the Diversion Header to indicate who diverted the > call, it it's privacy flag allows it of course. > > On any subsequent messages, re-invites, whatever else is getting sent > to the customer. I have to make sure I don't disclose the calling > number by mistake (customer could be logging those on his CPE). So, yes, > plenty of header usernames to track and replace for all kind of messages > and transactions within a dialogue. > >>> I noticed, when I restart kamailio after doing config changes, that >>> entries kept accumulating with each restart in the 'dialog' and >>> 'dialog_vars' tables, never expiring even the next day, when the >>> dialog timeout we set to 12 hours should have made sure they got >>> expired. >> >> And you're sure you've got these modparams configured correctly for >> this expectation? >> >> https://kamailio.org/docs/modules/5.6.x/modules/dialog.html#dialog.p.update_period >> >> https://kamailio.org/docs/modules/5.6.x/modules/dialog.html#dialog.p.db_mode > > I will give it another try :-) > > -- > Mit freundlichen Grüssen > > -Benoît Panizzon- @ HomeOffice und normal erreichbar > -- > I m p r o W a r e A G - Leiter Commerce Kunden > ______________________________________________________ > > Zurlindenstrasse 29 Tel +41 61 826 93 00 > CH-4133 Pratteln Fax +41 61 826 93 01 > Schweiz Web http://www.imp.ch > ______________________________________________________ -- Alex Balashov Principal Consultant Evariste Systems LLC Web: https://evaristesys.com Tel: +1-706-510-6800 __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-le...@lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:
