[asterisk-dev] [Code Review] 3633: Change in SETUP ACK handling (checking PI) in revision 413765 breaks working environments. This patch tries to make the change optional by adding a config option.

[Pavel Troller]

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Review request for Asterisk Developers.


Bugs: /, ASTERISK-23897 and Asterisk
    https://issues.asterisk.org/jira/browse//
    https://issues.asterisk.org/jira/browse/ASTERISK-23897
    https://issues.asterisk.org/jira/browse/Asterisk


Repository: Asterisk


Description
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The change introduced in revision 413765 limits opening the media channel and sending the PROGRESS control frame only to cases, when the Progress Indication with value "Inband Info now available" is present in the SETUP ACK message. However, there are exchanges (like these mentioned in the "environment" section), which don't send this PI in SETUP ACK, but they send regular dial tone. Now the dial tone (and any subsequent audio information until some progress indication is received from the PBX) cannot be heard. My proposed solution is to introduce a new config option. I've called it "alwayssendprogress" and it's a binary no/yes option. In the "no" status, it keeps the new behaviour in place. In the "yes" status, it restores the old one.
A better naming is possible, any proposals are welcome.
The supplied patch was tested on current V11 SVN and it seems to be working as expected.


Diffs
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  /branches/11/channels/sig_pri.c 416250 
  /branches/11/channels/sig_pri.h 416250 
  /branches/11/channels/chan_dahdi.c 416250 

Diff: https://reviewboard.asterisk.org/r/3633/diff/


Testing
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Regularly using the patch on three systems with no visible problems.


Thanks,

Pavel Troller

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