Disable rport on PJSIP

Asterisk Asterisk SIP
1

Hi, is there a way of forbidding Asterisk with PJSIP to send rport in Via header. Although I have an option force_rport set to no for my endpoints, rport is still present in the Options messages. This causes my cisco phones to automatically fall to unavailable state. For CHAN_SIP nat=no seems to work as expected.

Thanks in advance.

09:31:54.004628 IP (tos 0x0, ttl 64, id 24137, offset 0, flags [DF], proto UDP (17), length 453)
    10.0.0.100.5060 > 10.2.0.194.49982: SIP, length: 425
	OPTIONS sip:1002@10.2.0.194:49982 SIP/2.0
	Via: SIP/2.0/UDP 10.0.0.100:5060;rport;branch=z9hG4bKPj60e15592-489f-4424-b8f5-46a385119c15
	From: <sip:1002@10.0.0.100>;tag=90bd01f7-c24d-4092-ba81-94fa068dfe62
	To: <sip:1002@10.2.0.194>
	Contact: <sip:1002@10.0.0.100:5060>
	Call-ID: fe9bd533-8f8d-488f-aa76-76f5064a42de
	CSeq: 22705 OPTIONS
	Max-Forwards: 70
	User-Agent: FPBX-14.0.1.24(13.19.1)
	Content-Length:  0
2

I don’t think there is any configuration option, and I believe PJSIP has some explicit stuff (which may not be configurable) to place it into the signaling.

3

Joshua, thank you for a quick answer. I found something for an old version of PJSIP here: https://trac.pjsip.org/repos/ticket/1155 but have no idea if I can use it somehow or not. From your point of view, is there a way to turn this on (recompile)? I only found the reference in pjsip/src/pjsip/sip_util.c file.

Thank you.

4

If you modify the source code somewhere to do it then yes, otherwise an option would need to be added to pjsip.conf to configure that.

5

Thank you very much. I wiil try to find a way.