[OpenSIPS-Users] Modify the headers after executing a MI function in B2B_LOGIC module
Bogdan-Andrei Iancu
bogdan at opensips.org
Tue Aug 30 13:20:11 UTC 2022
Hi Li,
The INVITE in #77 is an initial INVITE, connecting to a new party (as a
result of the bridging), so the TO hdr in that INVITE is dictated by the
B2B logic - as you can see the TO URI is the same as RURI, pointing to
the new party in the bridging.
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 8/25/22 10:57 PM, Li Cai wrote:
>
> [This email is resent for the last one is oversized]
>
> Hi Bodgan,
>
> Thanks a lot for the help, the pcap file is attached. The call flow
> is as –
>
> #11. INVITE from the caller on 10.10.8.131 to
> B2BProxy 10.10.9.205
>
> #15. Forwarded INVITE from B2BProxy with the
> expected To header to SIP UA1
>
> .. . the call is setup and then b2b_bridge is triggered …
>
> #75. B2BProxy sent reINVITE to the caller
>
> #77. B2BProxy sent INVITE to SIP UA2 with the
> unaccepted To header
>
> #79. SIP UA2 rejected the call
>
> The step #77 And #79 shows the problem, that the call was rejected as
> the To header in INVITE is not using the UA2’s IP instead of
> B2BProxy’s IP as domain name, which is required in our system.
>
> In our opensips.cfg script, we have already included clauses like
> remove_hf(“To”) and append_hf(“To …”) but seems like they only work
> before b2b_bridge occurs.
>
> Thanks,
>
> Li
>
> *From:*Bogdan-Andrei Iancu <bogdan at opensips.org
> <mailto:bogdan at opensips.org>>
> *Sent:* August 25, 2022 3:05 AM
> *To:* Li Cai <Li.Cai at comtech.com <mailto:Li.Cai at comtech.com>>;
> OpenSIPS users mailling list <users at lists.opensips.org
> <mailto: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,
>
> 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 <https://gcc02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.opensips-solutions.com%2F&data=05%7C01%7CLi.Cai%40comtech.com%7C265b1df77ec245f4343608da866836ca%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637970079417930542%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=NsOtgfx4yXMaQTnaYHIT6%2FcSOPj20jmwJijgZKUHRQU%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%7C265b1df77ec245f4343608da866836ca%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637970079417930542%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=HesmiGoVT6s1gwqWYiWA4bhZmQJiV04AOUTXAAQSbww%3D&reserved=0>
>
> 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>
> <mailto:bogdan at opensips.org>
> *Sent:* August 24, 2022 10:33 AM
> *To:* Li Cai <Li.Cai at comtech.com> <mailto:Li.Cai at comtech.com>;
> OpenSIPS users mailling list <users at lists.opensips.org>
> <mailto: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%7C265b1df77ec245f4343608da866836ca%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637970079417930542%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=NsOtgfx4yXMaQTnaYHIT6%2FcSOPj20jmwJijgZKUHRQU%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%7C265b1df77ec245f4343608da866836ca%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637970079417930542%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=HesmiGoVT6s1gwqWYiWA4bhZmQJiV04AOUTXAAQSbww%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%7C265b1df77ec245f4343608da866836ca%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637970079417930542%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=NsOtgfx4yXMaQTnaYHIT6%2FcSOPj20jmwJijgZKUHRQU%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%7C265b1df77ec245f4343608da866836ca%7Ca9a26e696ae040c1bd801ca6cc677828%7C0%7C0%7C637970079417930542%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=HesmiGoVT6s1gwqWYiWA4bhZmQJiV04AOUTXAAQSbww%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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