[asterisk-bugs] [JIRA] (ASTERISK-26500) res_rtp_asterisk: DTMF RFC2833 with timestamp 0 are ignored

[Joshua Colp (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-26500?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joshua Colp updated ASTERISK-26500:
-----------------------------------

    Assignee: Thomas Sevestre
      Status: Waiting for Feedback  (was: Triage)

Please provide a wireshark capture and Asterisk log that shows this happening with a device.

> res_rtp_asterisk: DTMF RFC2833 with timestamp 0 are ignored
> -----------------------------------------------------------
>
>                 Key: ASTERISK-26500
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26500
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_rtp_asterisk
>    Affects Versions: 1.8.32.3, 14.0.2
>            Reporter: Thomas Sevestre
>            Assignee: Thomas Sevestre
>
> In function process_dtmf_rfc2833, the "Dropping out of order DTMF frame" test drops all DTMF with timestamp 0. Some equipments always send the first DTMF with timestamp 0. This leads to drop the first DTMF of each call.
> I've fixed the problem by changing this :
> {code:title=From res_rtp_asterisk.c}
> if ((rtp->last_seqno > seqno && rtp->last_seqno - seqno < 50)
> 	|| timestamp <= rtp->last_end_timestamp) {
> {code}
> into this:
> {code}
> if ((rtp->last_seqno > seqno && rtp->last_seqno - seqno < 50)
> 	|| (timestamp != 0 && timestamp <= rtp->last_end_timestamp)) {
> {code}



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