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Add "rport" in via to support NAT. #99

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finntenzor opened this issue Oct 14, 2023 · 1 comment
Open

Add "rport" in via to support NAT. #99

finntenzor opened this issue Oct 14, 2023 · 1 comment

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@finntenzor
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Problem:
Can not connenct to SIP server when client behind a NAT network.

Request Log:

REGISTER sip:1000@172.27.0.8:7060 SIP/2.0

Via: SIP/2.0/UDP 192.168.1.187:50066;branch=z9hG4bK.iJM9FQ5m5ZRW0ZJZTAvNGlTyN9JPA6Nl
......

What's expected:

REGISTER sip:1000@172.27.0.8:7060 SIP/2.0

Via: SIP/2.0/UDP 192.168.1.187:50066;rport;branch=z9hG4bK.iJM9FQ5m5ZRW0ZJZTAvNGlTyN9JPA6Nl
......

Solution:
Add an additional "rport" parameter in "Via" when request is prepared. (RFC3581)
I submitted a PR draft at PR 98. This PR only checks the functionality, not the configuration, which may need to be added.
@FireTiger23
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I also need this feature. Hope to support

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@FireTiger23 @finntenzor