Fred,
This is beautiful:
<extension name="b2bua"> <condition field="destination_number" expression="^b2bua-(.+)$"> <action application="log" data="INFO entered b2bua extension"/> <action application="set" data=“sendto=${sip_via_host}:5080"/> <action application="set" data="bypass_media=true"/> <action application="set" data="sip_copy_custom_headers=false"/> <action application="bridge" data="[sip_h_X-PGPX=${uuid}]sofia/internal/$1@${sendto}"/> <action application="hangup"/> </condition>
I was not aware it was that simple. Thank you for the education!
-- Alex
On May 30, 2024, at 6:24 PM, Fred Posner via sr-users sr-users@lists.kamailio.org wrote:
On May 30, 2024, at 5:49 PM, Alex Balashov via sr-users sr-users@lists.kamailio.org wrote:
Benoit,
Snip
- For those calls, you could deploy a lightweight, signalling-only B2BUA to solve these "looping" problems. SEMS has historically been recommended for this purpose often, but the community edition has fallen into a bit of disrepair. FreeSWITCH, Asterisk, Drachtio, and others make good alternatives.
Adding a B2BUA to your platform is also a moving part and introduces complexity. However, the call flow is extremely straightforward, the software componentry involved is very straightforward, and forwarding requests is a core competency of Kamailio that is very idiomatic. Compared to your solution of manipulating the Call-ID in baroque ways, it's much less internally complex, and runs in more well-worn grooves that will be more easily understood by other Kamailio operators and SIP experts in the future.
-- Alex
FreeSWITCH is pretty straight forward to do as a signaling only B2BUA for Kamailio. I did a presentation on it a cluecon last year with examples:
https://github.com/fredposner/cluecon2023
-- Fred Posner Phone: +1 (352) 664-3733 https://fred.tel (Sent from mobile. Please excuse typos/autocorrect)
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