[asterisk-bugs] [JIRA] (ASTERISK-22262) Asterisk send SIP 488 to T38 fallback re-invite

[Walter Doekes (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-22262?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Walter Doekes updated ASTERISK-22262:
-------------------------------------

    Attachment: issueA22262_allow_sdp_m-image-0-crap.patch
    
> Asterisk send SIP 488 to T38 fallback re-invite
> -----------------------------------------------
>
>                 Key: ASTERISK-22262
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-22262
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Channels/chan_sip/T.38
>    Affects Versions: 11.4.0
>            Reporter: Francesco Trinca
>            Assignee: Francesco Trinca
>            Severity: Critical
>         Attachments: issueA22262_allow_sdp_m-image-0-crap.patch
>
>
> In the fallback (t38) processes Astersisk send SIP 488.
> v=0
> o=XXXXXXXXXXXXXXXXXx
> s=-
> c=IN IP4 110.191.0.70
> t=0 0
> m=audio 17006 RTP/AVP 8
> a=rtpmap:8 PCMA/8000
> a=ptime:20
> m=image 0 RTP/AVP 0
> c=IN IP4 110.191.0.70
> <------------->
> --- (13 headers 10 lines) ---
> Sending to 10.198.0.70:5060 (no NAT)
> Found RTP audio format 8
> Found audio description format PCMA for ID 8
> [Jul 26 16:45:56] WARNING[29737][C-00000003]: chan_sip.c:10307 process_sdp: Rejecting image media offer due to invalid or unsupported syntax: image 0 RTP/AVP 0
> RFCs say: if port = 0 m=line must be ignored. 
> Have a patch o solution ?

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