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

[Jørgen H (JIRA)]

Jørgen H created ASTERISK-27702:
-----------------------------------

             Summary: 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


Adding codec h264 in allow-list result in that rtp_symmetric gets ignored and asterisk sends rtp auto 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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