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https://reviewboard.asterisk.org/r/3514/
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Review request for Asterisk Developers.


Bugs: ASTERISK-23501
    https://issues.asterisk.org/jira/browse/ASTERISK-23501


Repository: Asterisk


Description
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Per rfc3892, the Referred-By header in a REFER must be copied into the 
referenced request (IE. The outgoing INVITE to the transfer target).

* Automatically put the Referred-By header in the outgoing INVITE message if 
the SIPREFERREDBYHDR channel variable is defined with a value.

* Made chan_sip.c:get_refer_info() set SIPREFERREDBYHDR for inheritance so 
chan_pjsip has a better chance to interoperate.

* Fixed refer_blind_callback() and refer_incoming_refer_request() to not modify 
the data in the pointer returned by pjsip_msg_find_hdr_by_name().  It seems 
wrong to modify that data since the calling routine doesn't own the buffer.


Diffs
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  /branches/12/res/res_pjsip_refer.c 413157 
  /branches/12/channels/chan_sip.c 413157 

Diff: https://reviewboard.asterisk.org/r/3514/diff/


Testing
-------

The testsuite/tests/channels/pjsip/transfers/blind_transfer/caller_refer_only 
test now passes with this patch and the minor modification to allow 
SIPREFERREDBYHDR to have the optional inheritance '_' prefixes added.

Index: 
tests/channels/pjsip/transfers/blind_transfer/caller_refer_only/test-config.yaml
===================================================================
--- 
tests/channels/pjsip/transfers/blind_transfer/caller_refer_only/test-config.yaml
    (revision 5006)
+++ 
tests/channels/pjsip/transfers/blind_transfer/caller_refer_only/test-config.yaml
    (working copy)
@@ -104,7 +104,7 @@
                 match:
                     Event: 'VarSet'
                     Channel: 'PJSIP/bob-.{8}'
-                    Variable: 'SIPREFERREDBYHDR'
+                    Variable: '_{0,2}SIPREFERREDBYHDR'
                     Value: 'alice <sip:[email protected]>'
             count: 2
         -
@@ -112,7 +112,7 @@
             conditions:
                 match:
                     Event: 'VarSet'
-                    Variable: 'SIPREFERTOHDR'
+                    Variable: '_{0,2}SIPREFERTOHDR'
                     Value: 'sip:[email protected]'
             count: 2
         -


Thanks,

rmudgett

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