[asterisk-bugs] [JIRA] (ASTERISK-29359) transport_apply: Allow to define a transport without listener

[Asterisk Team (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-29359?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=254255#comment-254255 ] 

Asterisk Team commented on ASTERISK-29359:
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> transport_apply: Allow to define a transport without listener
> -------------------------------------------------------------
>
>                 Key: ASTERISK-29359
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-29359
>             Project: Asterisk
>          Issue Type: Improvement
>      Security Level: None
>          Components: . I did not set the category correctly.
>    Affects Versions: 18.0.0
>            Reporter: Michael Maier
>
> res_pjsip/config_transport.c:
> The pjsip architecture uses so called transports as the interface of each configured device, which provides the network connection for a device. Therefore Asterisk provides a interface to create this transport. At the moment, it is impossible to create a transport without a listener added (even the flow transport can't be used without an arbitrary existing transport containing the correct listener (sip / sips)). 
> Attached is a proposal, which enables Asterisk to configure transports without forcibly adding a listener. This is handy if you don't need a listener at all (and therefore increases security) - e.g. for a trunk device, which registers itself to a SIP provider and which is and should be never connected from outside. Pjsip itself supports this operation by adding port 0 to this transport.
> This proposal is tested on base of ASTERISK-29241.



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