[asterisk-bugs] [JIRA] (ASTERISK-27696) PJSIP accepts UDP register for TCP endpoint

[Joshua Colp (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-27696?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joshua Colp updated ASTERISK-27696:
-----------------------------------

    Assignee: snuffy
      Status: Waiting for Feedback  (was: Triage)

What is the actual configuration for this?

A difference between chan_sip and chan_pjsip is that the "transport" option doesn't restrict reception of messages. Instead it explicitly uses the given transport for outgoing messages, which can result in behavior like this - specifically OPTIONS failing because it can't be sent using TCP and the contact becoming unreachable.

> PJSIP accepts UDP register for TCP endpoint
> -------------------------------------------
>
>                 Key: ASTERISK-27696
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27696
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_pjsip
>    Affects Versions: GIT
>         Environment: Debian 9
> Compile options
> DONT_OPTIMIZE
> BETTER_BACKTRACES
>            Reporter: snuffy
>            Assignee: snuffy
>            Severity: Minor
>              Labels: pjsip
>         Attachments: pjsip-accepts-udp-register-for-tcp-endpoint-once.txt
>
>
> *Create an Endpoint with TCP as transport
> * Use dynamic registration
> * Set a phone to use UDP instead to register as endpoint
> First registration attempt as UDP will be accepted by Asterisk with 200 OK
> Asterisk then flags AOR as available, then immediately removes the contact as it is UDP.
> From then on phone gets correct 401 - REFUSED to any further attempts to register / call out.
> Will attach test case shortly



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