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

Walter Doekes (JIRA) noreply at issues.asterisk.org
Mon Aug 19 04:01:03 CDT 2013


    [ https://issues.asterisk.org/jira/browse/ASTERISK-22262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=209290#comment-209290 ] 

Walter Doekes commented on ASTERISK-22262:
------------------------------------------

The problem is in fact the "0" after the RTP/AVP, not the "0" before. Asterisk likes to see "t38" there.

But I agree that's not a case of being liberal in what you accept.
                
> 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
>
> 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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