[asterisk-bugs] [JIRA] (ASTERISK-27702) allow video/h264 breaks symmetric rtp

[Jørgen H (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-27702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=242397#comment-242397 ] 

Jørgen H commented on ASTERISK-27702:
-------------------------------------

with h264:
Sent RTP packet to      10.24.5.115:3000 (type 08, seq 006566, ts 1173570704, len 000160)

and obviously no got rtp packet from that ip.

Without h264 it is sent to correct ip and received from correct ip.

> allow video/h264 breaks symmetric rtp
> -------------------------------------
>
>                 Key: ASTERISK-27702
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-27702
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_pjsip
>    Affects Versions: 14.5.0, 15.2.2
>         Environment: linux x64
> Verified on 
> asterisk 15.2.2 with pjsip 2.7.2
> asterisk 14.5 and pjsip 2.6
>            Reporter: Jørgen H
>            Assignee: Jørgen H
>            Severity: Minor
>              Labels: pjsip
>
> Adding codec h264 in allow-list result in that rtp_symmetric gets ignored and asterisk sends rtp audio to the ip-address in the sdp even when h264 is not in use.
> Config:
> rewrite_contact = yes
> rtp_symmetric = yes
> force_rport = yes
> direct_media = no
> allow = !all,opus,g722,alaw,ulaw,h264
> SDP from answering telephone when audio works without h264 in allow list:
> v=0
> o=MxSIP 0 1 IN IP4 10.24.5.115
> s=SIP Call
> c=IN IP4 10.24.5.115
> t=0 0
> m=audio 3000 RTP/AVP 9 8 0 101
> a=rtpmap:9 G722/8000
> a=rtpmap:8 PCMA/8000
> a=rtpmap:0 PCMU/8000
> a=rtpmap:101 telephone-event/8000
> a=silenceSupp:off - - - -
> a=fmtp:101 0-15
> a=ptime:20
> a=sendrecv
> SDP when h264 is enabled and audio does not work (audio is sent to 10.24.5.115):
> v=0
> o=MxSIP 0 1 IN IP4 10.24.5.115
> s=SIP Call
> c=IN IP4 10.24.5.115
> t=0 0
> m=audio 3000 RTP/AVP 9 8 0 101
> a=rtpmap:9 G722/8000
> a=rtpmap:8 PCMA/8000
> a=rtpmap:0 PCMU/8000
> a=rtpmap:101 telephone-event/8000
> a=silenceSupp:off - - - -
> a=fmtp:101 0-15
> a=ptime:20
> a=sendrecv
> m=video 0 RTP/AVP 99



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