[asterisk-bugs] [JIRA] (ASTERISK-25360) chan_sip:wrong ice candidate fails html5client on mobile connection

[Asterisk Team (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-25360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=227420#comment-227420 ] 

Asterisk Team commented on ASTERISK-25360:
------------------------------------------

The severity of this issue has been automatically downgraded from "Blocker" to "Major". The "Blocker" severity is reserved for issues which have been determined to block the next release of Asterisk. This severity can only be set by privileged users. If this issue is deemed to block the next release it will be updated accordingly during the triage process.

> chan_sip:wrong ice candidate fails html5client on mobile connection
> -------------------------------------------------------------------
>
>                 Key: ASTERISK-25360
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-25360
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/WebSocket, Resources/res_pjsip
>    Affects Versions: 13.4.0, 13.5.0
>         Environment: server: Centos 6.7
> client: Ubuntu, Windows, Android with Chrome 44 and Firefox 40, sipML5, SIP.js
>            Reporter: Fabrizio Lombardozzi
>
> Scenario:
> asterisk server  <--nat--> internet <--nat--> html5client
> Systematically, when using webrtc, chan_sip.c:add_ice_to_sdp() chooses only LAN_ADDRESS of the server, so the SDP INVITE reply reports only candidate addresses that the client can't reach (see log)
> "sip show settings" cli command reports that PUBLIC_ADDRESS specified sip.conf and local subnets, are set properly, even media_address is set  to PUBLIC_ADDRESS.
> Tcpdump running on the server reports no traffic to the stun server specified in rtp.conf
> In addition is to consider that the issue becomes actual only if the client uses a mobile connection (or is a mobile device using mobile connection), in all the other cases (pc with adsl router, mobile device with wifi-adsl) the client "understand" (don't know how or why) that is better to use the address specified in the sip header (or maybe where the traffic comes from).
> Brutely forcing PUBLIC_ADDRESS in add_ice_to_sdp() of chan_sip.c source code made the call possible from 3g mobile also.
> Multiple clients tested with sipML5, SIP.js in Firefox 40, Chrome44, on linux, windows and android with identical results.



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