[SR-Users] issue with rewrite to domain in failure route

Alex Balashov abalashov at evaristesys.com
Mon Sep 17 11:28:10 CEST 2018


That is not a safe way to change the To header, since proxies aren't supposed to modify the To or From headers. 

The proper approach conceals the fact that modifications have taken place from the caller:

https://kamailio.org/docs/modules/5.1.x/modules/uac.html#uac.f.uac_replace_to

--
Sent from mobile. Apologies for brevity and errors. 

-----Original Message-----
From: Mojtaba <mespio at gmail.com>
To: "Kamailio (SER) - Users Mailing List" <sr-users at lists.kamailio.org>
Sent: Mon, 17 Sep 2018 5:23 AM
Subject: Re: [SR-Users] issue with rewrite to domain in failure route

The $td is read-only variable, and yoou could not change it's value.
If you want to change domain in To header, You should use testops
module in kamialio and replace domain in To header. for example:
subst('/^To:(.*)sip:[^@]*@[a-zA-Z0-9.]+(.*)$/t:\1$avp(sip_address)\2/ig')
With Regards.Mojtaba

On Mon, Sep 17, 2018 at 1:19 PM Yuriy Gorlichenko <ovoshlook at gmail.com> wrote:
>
> Hi
> I'm building some system with failover trunk
> but my providers requires to set their doamin in domain part of To Header
>
> so when I rewrite it at the my failure_route
>
> $td = FAILOVER_PROVIDER
> my To filed looks like
> To: <sip: 123 at my.failover.providermy.main.provider>
> what i tried:
> Move this change to BRANCH_ROUTE:
> here tried as
> $td =  as
> uac_replace_to('',"newToFieldValue)
>
> Move to the my custom route with both variants
> But result is the same
> kamailio 5.1
>
> version: kamailio 5.1.5 (x86_64/linux) d06080
> flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
> ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144 MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
> poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
> id: d06080
> compiled on 00:43:08 Aug 23 2018 with gcc 6.3.0
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users



-- 
--Mojtaba Esfandiari.S

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