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

[Matt Jordan (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-22262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=208549#comment-208549 ] 

Matt Jordan commented on ASTERISK-22262:
----------------------------------------

We require a complete debug log to help triage the issue. This document will provide instructions on how to collect debugging logs from an Asterisk machine for the purpose of helping bug marshals troubleshoot an issue: https://wiki.asterisk.org/wiki/display/AST/Collecting+Debug+Information

Please also include a pcap showing the entire SIP trace.
                
> 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
>            Severity: Critical
>
> 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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