[asterisk-bugs] [Asterisk 0018397]: IAX2 CODEC_PRES wrong (offset error?)

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=18397 
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Reported By:                birgita
Assigned To:                
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Project:                    Asterisk
Issue ID:                   18397
Category:                   Channels/chan_iax2
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           SVN 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!): 296230 
Request Review:              
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Date Submitted:             2010-11-29 08:41 CST
Last Modified:              2010-12-01 06:36 CST
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Summary:                    IAX2 CODEC_PRES wrong (offset error?)
Description: 
On an incoming IAX2 call, the console reports (correctly):

Tx-Frame Retry[000] -- OSeqno: 000 ISeqno: 000 Type: IAX     Subclass: NEW
   
   Timestamp: 00005ms  SCall: 09646  DCall: 00000 [94.12.29.127:2705]
   VERSION         : 2
   CODEC_PREFS     : (gsm|ulaw)
   FORMAT          : 2
   FORMAT2         : gsm
   CAPABILITY      : 6
   CAPABILITY2     : unknown
   ADSICPE         : 2

However, Asterisk sends over the wire as value for CODEC_PREFS: "CD"
This is incorrect. It should be "BC":

A = "AUDIO_G723",
B = "AUDIO_GSM",
C = "AUDIO_ULAW",
D = "AUDIO_ALAW",

In this case codec negotiation does not fail because of FORMAT(2).
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 (0129232) birgita (reporter) - 2010-12-01 06:36
 https://issues.asterisk.org/view.php?id=18397#c129232 
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I think I got my info from:
https://issues.asterisk.org/bug_view_page.php?bug_id=0002971

Indeed I cannot find the encoding information in RFC 5456 either:
http://www.rfc-editor.org/rfc/rfc5456.txt
which would have been helpful, but that is a different matter. 

Issue History 
Date Modified    Username       Field                    Change               
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2010-12-01 06:36 birgita        Note Added: 0129232                          
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