[OpenSIPS-Users] Modify the headers after executing a MI function in B2B_LOGIC module

Thu Aug 25 07:05:29 UTC 2022

Hi Li,

Somehow we are going in circles here :). So, could you post a pcap for 
call going via your B2B  (showing all in and out SIP messages) and 
mention which frame is the outgoing request you cannot modify ?

Regards,

Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
   https://www.opensips-solutions.com
OpenSIPS Summit 27-30 Sept 2022, Athens
   https://www.opensips.org/events/Summit-2022Athens/

On 8/24/22 6:50 PM, Li Cai wrote:
>
> Hi Bogdan,
>
> Thanks for the explanation. I mean that the local_route can take 
> effect for the forwarded INVITE(from incoming ones) in our proxy, but 
> not after b2b_bridge. I’ll do more debugging on it since the messages 
> should be visible. Thank you very much.
>
> Thanks,
>
> Li
>
> *From:*Bogdan-Andrei Iancu <bogdan at opensips.org>
> *Sent:* August 24, 2022 10:33 AM
> *To:* Li Cai <Li.Cai at comtech.com>; OpenSIPS users mailling list 
> <users at lists.opensips.org>
> *Subject:* Re: [OpenSIPS-Users] Modify the headers after executing a 
> MI function in B2B_LOGIC module
>
> *WARNING: External Email: Exercise Caution*
>
> Hi Li,
>
> All SIP requests generated by `b2b_bridge` are to be visible in 
> local_route. And on the contrary, the incoming (received) requests DO 
> NOT trigger local route.
>
> Regards,
>
> Bogdan-Andrei Iancu
> OpenSIPS Founder and Developer
>    https://www.opensips-solutions.com  <https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.opensips-solutions.com%2F&data=05%7C01%7CLi.Cai%40comtech.com%7C3cfc94bd30494557971708da85dd8120%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637969483655810006%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Alp8ey%2Frlw%2BagiLIsIphXz51eF74enunVGtuvY3veHA%3D&reserved=0>
> OpenSIPS Summit 27-30 Sept 2022, Athens
>    https://www.opensips.org/events/Summit-2022Athens/  <https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.opensips.org%2Fevents%2FSummit-2022Athens%2F&data=05%7C01%7CLi.Cai%40comtech.com%7C3cfc94bd30494557971708da85dd8120%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637969483655810006%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=ECg5RaeWv7nyMoFz2sTaFdQU%2BqzGA3wBaCGzbUfmygo%3D&reserved=0>
>
> On 8/24/22 4:34 PM, Li Cai wrote:
>
>     Hi Bogdan,
>
>     Yes, we have put the changes by calling remove_hf() and
>     append_hf() in the ‘local_route’, those functions for new incoming
>     INVITE but not the INVITE sent out by ‘b2b_bridge’.
>
>     Thanks,
>
>     Li
>
>     *From:*Bogdan-Andrei Iancu <bogdan at opensips.org>
>     <mailto:bogdan at opensips.org>
>     *Sent:* August 24, 2022 7:18 AM
>     *To:* OpenSIPS users mailling list <users at lists.opensips.org>
>     <mailto:users at lists.opensips.org>; Li Cai <Li.Cai at comtech.com>
>     <mailto:Li.Cai at comtech.com>
>     *Subject:* Re: [OpenSIPS-Users] Modify the headers after executing
>     a MI function in B2B_LOGIC module
>
>     *WARNING: External Email: Exercise Caution*
>
>
>     Hi Li,
>
>     Have you tried to use the local_route in order to do custom
>     changes on the outgoing requests generated by the B2B bridging ?
>
>     Best regards,
>
>
>     Bogdan-Andrei Iancu
>
>       
>
>     OpenSIPS Founder and Developer
>
>        https://www.opensips-solutions.com  <https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.opensips-solutions.com%2F&data=05%7C01%7CLi.Cai%40comtech.com%7C3cfc94bd30494557971708da85dd8120%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637969483655810006%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Alp8ey%2Frlw%2BagiLIsIphXz51eF74enunVGtuvY3veHA%3D&reserved=0>
>
>     OpenSIPS Summit 27-30 Sept 2022, Athens
>
>        https://www.opensips.org/events/Summit-2022Athens/  <https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.opensips.org%2Fevents%2FSummit-2022Athens%2F&data=05%7C01%7CLi.Cai%40comtech.com%7C3cfc94bd30494557971708da85dd8120%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637969483655810006%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=ECg5RaeWv7nyMoFz2sTaFdQU%2BqzGA3wBaCGzbUfmygo%3D&reserved=0>
>
>     On 8/23/22 10:34 PM, Li Cai wrote:
>
>         Hi,
>
>         I’m working on a change for a B2BUA based on OpenSIPs 2.4, but
>         not sure if the function is supported or if it has been
>         supported in the later versions.
>
>         We have used the MI command b2b_bridge to bridge existing
>         calls from one entity to another and it works, the scenario is
>         the same as expected. While besides this, we also need to
>         modify one of the headers of the INVITEs sending to the new
>         destination in this scenario,  our scripts in the opensips.cfg
>         can’t take any effect.
>
>         Thanks,
>
>         Li
>
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