Hello,
On 01.12.25 13:10, Володимир Іванець via sr-users wrote:
> Hello!
>
> I just faced the same behavior.
>
> I have modparam("topoh", "mask_ip", "") so Kamailio uses the address
> it sends packets from. Inside event_route[topoh:msg-outgoing] it
> rewrites the Contact header but skips adding transport value for TCP
> or TLS. Is there a way of including transport value or adding
> parameter to mask_mode setting to exclure processing Contact header
> for all responses?
>
> Thanks!
>
> пт, 22 серп. 2025 р. о 17:09 Mathias Schneuwly via sr-users
> <[email protected]> пише:
>
> Hi
>
> I have a question related to topoh. We are running Kamailio in
> version 6.0.2 with topoh enabled. The PJSIP based softphone is
> unable to establish a call with SIPS and SRTP if we use
> "PJMEDIA_SRTP_MANDATORY" in PJSIP.
>
> PJSIP complains about "Secure dialog requires SIPS scheme in
> Contact and Record-Route headers, ending the session". The other
> side is sending "Contact:
> <sips:[email protected]:59686;transport=tls>", but topoh
> modifies the contact header to "Contact:
>
> <sip:127.0.0.8;line=sr-avdFaQDvhUxGrqtxhqxThq-ZnUy6nUzGrQDZmqa1rUf6a0JTaLt4aoyV2EGQ>"
> without sips scheme and without transport=tls. PJSIP then refuses
> to establish the call and sends immediately a BYE.
>
> If topoh is disabled, the call is successfully established.
>
> Is it somehow possible to tell topoh to keep the scheme or
> transport=tls if the other side provided it?
>
the UA does not route using Contact, it has to use the Record-/Route
header(s) set by Kamailio, which should have the transport=tls, if that
side of the call is over TLS. Also, sips does not mean transport=tls,
but that the traffic goes over "secure" channel, which can be ipsec/vpn,
private networks, ...
Cheers,
Daniel
--
Daniel-Constantin Mierla (@ asipto.com)
twitter.com/miconda -- linkedin.com/in/miconda
Kamailio Consultancy, Training and Development Services -- asipto.com
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