[asterisk-bugs] [Asterisk 0016313]: Responds sendrecv to recvonly SDP, but RFC 3264 says sendonly and inactive are only possible replies

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=16313 
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Reported By:                davidw
Assigned To:                
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Project:                    Asterisk
Issue ID:                   16313
Category:                   Channels/chan_sip/General
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     acknowledged
Asterisk Version:           SVN 
JIRA:                       SWP-447 
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!): 230951 
Request Review:              
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Date Submitted:             2009-11-23 11:26 CST
Last Modified:              2010-06-22 21:19 CDT
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Summary:                    Responds sendrecv to recvonly SDP, but RFC 3264 says
sendonly and inactive are only possible replies
Description: 
Whilst looking at possible solutions to
https://issues.asterisk.org/view.php?id=16254, I noticed that Asterisk can
never send a sendonly SDP response.  Moreover it treats an inbound recvonly
as an unrecognized case.  The result is that it sends the default sendrecv
response.

RFC 3624 says that the only acceptable responses to recvonly are sendonly
and inactive.  I.E., reading between the lines, the response cannot offer
more capabilities than the request would allow.
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Relationships       ID      Summary
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related to          0016373 Asterisk ignoring sendonly SDP generate...
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 (0123740) warlock52 (reporter) - 2010-06-22 21:19
 https://issues.asterisk.org/view.php?id=16313#c123740 
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Hi,
we have run into an issue today after having upgraded from 1.4 to 1.6.2.9
last week. We are using a SIP SDK that has been without an issue with
Asterisk 1.4 for over 8 months now but when upgrading to 1.6.2.9 certain
funtions do not work any longer. One of them is according to the SDK
provider (www.pcbest.net) the incorrect response to a HOLD feature from the
SDK-Softphone where Asterisk should respond with return a=recvonly but the
Asterisk server returns a=sendrecv.

How can we get arround this because with this a the hold function for the
SIP clients using the SDK no longer works. The Audio is never suspended and
the customer still hears us talking. 

Issue History 
Date Modified    Username       Field                    Change               
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2010-06-22 21:19 warlock52      Note Added: 0123740                          
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