[Users] OpenSER not processing "200 OK" reponse to CANCEL message

Tavis P tavis.lists at galaxytelecom.net
Mon Oct 3 20:23:32 CEST 2005


Using logic similar to the Onsip.org config file i'm doing call forward
no-answer using a TM timer, when the call is forwarded OSER sends a
cancel to the original client which responds with a "200 OK".  OSER
doesn't seem to process this 200 ok, generating an error and resending
the CANCEL message.

Running OSER in debug level 5 shows that OSER was not able to match the
"200 OK" to the CANCEL message

Below is a trace of exchange, the following error is recorded in the
debug log
--
 get_hdr_field: cseq <CSeq>: <102> <CANCEL>
header field type 5, name=<CSeq>, body=<102 CANCEL>
DEBUG: t_reply_matching: hash 44785 label 1883536846 branch 0
DEBUG: t_reply_matching: no matching transaction exists
DEBUG: t_reply_matching: failure to match a transaction
DEBUG: t_check: msg id=3 global id=3 T end=(nil)
....
ERROR: forward_reply: no 2nd via found in reply
--


#
U OSER_PROXY:15061 -> SIP_UAC:5060
CANCEL sip:200110005333 at 192.168.99.240:5060 SIP/2.0.
Via: SIP/2.0/UDP OSER_PROXY:15061;branch=z9hG4bKb3b2.9e597b73.0.
From: tavis <sip:200110005334 at OSER_PROXY:15061>;tag=d478d8ef4036cbffo0.
Call-ID: c818cfaf-edd9443f at 192.168.99.66.
To: <sip:200110005333 at OSER_PROXY:15061>.
CSeq: 102 CANCEL.
Content-Length: 0.
.

#
U SIP_UAC:5060 -> OSER_PROXY:15061
SIP/2.0 200 OK.
Via: SIP/2.0/UDP OSER_PROXY:15061;branch=z9hG4bKb3b2.9e597b73.0.
From: tavis <sip:200110005334 at OSER_PROXY:15061>;tag=d478d8ef4036cbffo0.
To:
<sip:200110005333 at OSER_PROXY:15061>;tag=00055e7cd6f33c1a551406a2-75f29afe.
Call-ID: c818cfaf-edd9443f at 192.168.99.66.
CSeq: 102 CANCEL.
Server: Cisco-CP7960G/7.5.
Content-Length: 0.
.





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