Hi all,
 
 as announced quite a while ago, I finally checked in code that allows to
 produce CDRs (Call Data Records) directly from SIP-Router and generate
 logs accordingly.
 
 The main code portion resides in modules_k/acc and provides a switch to
 enable basic CDR generation including start time, end time, and
 duration. Analogous to the existing logging approach, you may define an
 extra parameter covering to-be-included dialog pseudo-variables that
 must be assigned in the configuration script. The new code will take
 care of transforming the basic and custom CDR fields into CDR logs at
 the end of a dialog.
 
 Speaking of dialogs: The implementation relies heavily on the dialog
 module. It takes advantage of dialog variables introduces by Carsten
 Bock and adds a few more features. Most notably, we had to change the
 dialog callback signature to provide both request and response messages.
 Having only one of them proved to be insufficient in certain cases; for
 instance, a locally generated 408 returned a FAKED_REPLY, thus rendering
 it impossible to access dialog variables through the PV framework. Other
 modules using dialog callbacks have been updated along the commit,
 third-party modules outside the repository will need to do so too (and
 think about whether using the request or response is the Right Thing to do).
 
 Due to the changes brought to the dialog module, I pushed the new acc
 and dialog code into a separate branch called treimann/acc-cdr. Feel
 free to give it a try by consulting the updated documentation and
 suggesting (or, if it's good enough, implementing :) ) improvements. A
 Kamailio 1.5 backport of the code has been in usage for quite some time
 with us, so generally there shouldn't be any major logical flaws.
 SIP-Router certainly needs more testing, however, so I'd be glad for any
 feedback. My plan is to merge the code into master branch prior to the
 3.2 feature freeze, unless significant objections arise.
 
 Finally, big-time credits go to my co-worker Sven Knoblich who is the
 main contributor of the code. He's been working on this stuff for the
 past few months and dreams in CDRs by now.
 
 
 Cheers,
 
 --Timo
  
 

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