[asterisk-bugs] [Asterisk 0016250]: UDPTL asked to send 77 bytes of IFP when far end only prepared to accept 45 bytes; data loss may occur.

[Asterisk Bug Tracker]

The following issue has been UPDATED. 
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https://issues.asterisk.org/view.php?id=16250 
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Reported By:                Alex Oniciuc
Assigned To:                kpfleming
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Project:                    Asterisk
Issue ID:                   16250
Category:                   Channels/chan_sip/T.38
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     closed
Asterisk Version:           1.6.1.9 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
Resolution:                 no change required
Fixed in Version:           
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Date Submitted:             2009-11-16 03:31 CST
Last Modified:              2009-11-16 08:56 CST
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Summary:                    UDPTL asked to send 77 bytes of IFP when far end
only prepared to accept 45 bytes; data loss may occur.
Description: 
I'm using Asterisk's fax passthrough functionality to send faxes from one
t38 enabled Patton to another.

The faxes arrive correctly but the Asterisk logs are full of error
messages like:

[Nov 16 09:35:08] WARNING[3762]: udptl.c:1003 ast_udptl_write: UDPTL asked
to send 77 bytes of IFP when far end only prepared to accept 45 bytes; data
loss may occur.
[Nov 16 09:35:08] ERROR[3762]: udptl.c:292 encode_open_type: Buffer
overflow detected (77 + 239 > 244)
[Nov 16 09:35:08] NOTICE[3762]: udptl.c:1014 ast_udptl_write: UDPTL
Transmission error to XXX.XXX.XXX.XXX:10008: Message too long

or

[Nov 16 09:35:22] WARNING[3762]: udptl.c:1003 ast_udptl_write: UDPTL asked
to send 53 bytes of IFP when far end only prepared to accept 45 bytes; data
loss may occur.

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---------------------------------------------------------------------- 
 (0113847) file (administrator) - 2009-11-16 08:56
 https://issues.asterisk.org/view.php?id=16250#c113847 
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Unfortunately the fix is not yet in any released version so you can either
use a release candidate or wait until the final version is released. Once
that is done you will be able to override the maximum datagram size using
maxdatagram and make the messages go away. 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2009-11-16 08:56 file           Note Added: 0113847                          
2009-11-16 08:56 file           Status                   assigned => resolved
2009-11-16 08:56 file           Resolution               open => no change
required
2009-11-16 08:56 file           Status                   resolved => closed  
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