Summary:	ASTERISK-15083: [patch] T.38 reinvite fails after receiving "415 Unsupported media type" when it could continue in audio mode
Reporter:	Atis Lezdins (atis)	Labels:
Date Opened:	2009-11-05 07:54:34.000-0600	Date Closed:	2009-12-02 10:51:14.000-0600
Priority:	Major	Regression?	No
Status:	Closed/Complete	Components:	Channels/chan_sip/Interoperability
Versions:		Frequency of Occurrence
Related Issues:
Environment:		Attachments:	( 0) priovider_success.txt ( 1) provider_fail.txt ( 2) sip_t38_response_415.patch
Description:	Our SIP provider is responding with "415 Unsupported media type" if it can't switch to T.38 for inbound fax. After receiving that, chan_sip terminates call, and app_fax terminates with "WARNING[29097] app_fax.c: Transmission error". According to RFC3261 section 8.1.3.5: The UAC SHOULD retry sending the request, this time only using content with types listed in the Accept header field in the response, with encodings listed in the Accept-Encoding header field in the response, and with languages listed in the Accept-Language in the response. I tried handling the 415 response exactly the same way as 488 response is being handled (patch attached), and our provider accepts that and allows call to be continued in audio mode.
Comments:	By: Digium Subversion (svnbot) 2009-12-02 10:47:50.000-0600 Repository: asterisk Revision: 232345 U   trunk/channels/chan_sip.c ------------------------------------------------------------------------ r232345 | file | 2009-12-02 10:47:49 -0600 (Wed, 02 Dec 2009) | 7 lines Add support for handling the 415 Unsupported media type response like we do for a 488 Not acceptable here response. (closes issue ASTERISK-15083) Reported by: atis Patches:      sip_t38_response_415.patch uploaded by atis (license 242) ------------------------------------------------------------------------ http://svn.digium.com/view/asterisk?view=rev&revision=232345 By: Digium Subversion (svnbot) 2009-12-02 10:49:30.000-0600 Repository: asterisk Revision: 232346 _U  branches/1.6.0/ U   branches/1.6.0/channels/chan_sip.c ------------------------------------------------------------------------ r232346 | file | 2009-12-02 10:49:30 -0600 (Wed, 02 Dec 2009) | 14 lines Merged revisions 232345 via svnmerge from https://origsvn.digium.com/svn/asterisk/trunk ........  r232345 | file | 2009-12-02 12:40:14 -0400 (Wed, 02 Dec 2009) | 7 lines    Add support for handling the 415 Unsupported media type response like we do for a 488 Not acceptable here response.    (closes issue ASTERISK-15083)  Reported by: atis  Patches:        sip_t38_response_415.patch uploaded by atis (license 242) ........ ------------------------------------------------------------------------ http://svn.digium.com/view/asterisk?view=rev&revision=232346 By: Digium Subversion (svnbot) 2009-12-02 10:50:28.000-0600 Repository: asterisk Revision: 232347 _U  branches/1.6.1/ U   branches/1.6.1/channels/chan_sip.c ------------------------------------------------------------------------ r232347 | file | 2009-12-02 10:50:28 -0600 (Wed, 02 Dec 2009) | 14 lines Merged revisions 232345 via svnmerge from https://origsvn.digium.com/svn/asterisk/trunk ........  r232345 | file | 2009-12-02 12:40:14 -0400 (Wed, 02 Dec 2009) | 7 lines    Add support for handling the 415 Unsupported media type response like we do for a 488 Not acceptable here response.    (closes issue ASTERISK-15083)  Reported by: atis  Patches:        sip_t38_response_415.patch uploaded by atis (license 242) ........ ------------------------------------------------------------------------ http://svn.digium.com/view/asterisk?view=rev&revision=232347 By: Digium Subversion (svnbot) 2009-12-02 10:51:14.000-0600 Repository: asterisk Revision: 232348 _U  branches/1.6.2/ U   branches/1.6.2/channels/chan_sip.c ------------------------------------------------------------------------ r232348 | file | 2009-12-02 10:51:13 -0600 (Wed, 02 Dec 2009) | 14 lines Merged revisions 232345 via svnmerge from https://origsvn.digium.com/svn/asterisk/trunk ........  r232345 | file | 2009-12-02 12:40:14 -0400 (Wed, 02 Dec 2009) | 7 lines    Add support for handling the 415 Unsupported media type response like we do for a 488 Not acceptable here response.    (closes issue ASTERISK-15083)  Reported by: atis  Patches:        sip_t38_response_415.patch uploaded by atis (license 242) ........ ------------------------------------------------------------------------ http://svn.digium.com/view/asterisk?view=rev&revision=232348