[asterisk-bugs] [JIRA] Commented: (ASTERISK-20295) Asterisk is not incrementing the sequence numbers for the retransmission of the DTMF end packets(RTPEvent packet with end bit set to 1)

[Michael L. Young (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-20295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=196267#comment-196267 ] 

Michael L. Young commented on ASTERISK-20295:
---------------------------------------------

Hmm... I would be all for an option.  Glad you chimed in because I totally spaced it when looking at this.  I guess when I looked at it, I figured we should be supporting the latest RFC and that is all I looked at.

RFC4733 makes RFC2833 obsolete.  Therefore, I would think it would be in the best interest for Asterisk to support RFC4733 since I would hope that developers are developing against the latest standard and not an old one with vague wording.

I can see the vagueness... "(The RTP sequence number is incremented by one for each packet.)" ... but it doesn't specify for retransmissions like rfc4733 does.

> Asterisk is not incrementing the sequence numbers for the retransmission of the DTMF end packets(RTPEvent packet with end bit set to 1) 
> ----------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: ASTERISK-20295
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20295
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_rtp_asterisk
>    Affects Versions: 1.8.15.0, 10.7.0, 11.0.0-beta1
>         Environment: OS: Debian squeeze distribution x86_64 architecture
>            Reporter: NITESH BANSAL
>            Assignee: Michael L. Young
>            Severity: Minor
>         Attachments: 01_rtp_event_seq_num.patch, asterisk-20295-dtmf-fix-cleanup.diff
>
>
> Issue: 
> All 3 retransmitted ending packets share the same sequence number, which does not comply with RFC 4733 Sect. 2.5.1.6. RTP Sequence Number
> The RTP sequence number MUST be incremented by one in each successive RTP packet sent. Incrementing applies to retransmitted as well as
> initial instances of event reports, to permit the receiver to detect lost packets for RTP Control Protocol (RTCP) receiver reports.

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