Bugs item #2685610, was opened at 2009-03-12 20:37
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Category: core
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: OPTIONS problem

Initial Comment:
I have an event where two packets arrive - the first being an ACK from an 
reINVITE / 200 OK and the second being an OPTIONS packet.   When these are 
forwarded, they are actually sent in reverse order, the OPTIONS request is sent 
before the ACK is sent (the CSeq for the ACK is 2 and the CSeq for the OPTIONS 
is 3).   This is breaking the call as the CSeq is received out of order on the 
far-end.   I've used Wireshark to actually see the incoming order and the 
outgoing packets sent.   I'm using OpenSIPS v. 1.4.4 (no TLS) on a FreeBSD 
(64-bit) 7.1 machine.

I've even tried running SER 0.9.6 and the same thing occurs.

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