20 Jan
2006
20 Jan
'06
8:36 p.m.
I was looking at packet traces of the OPTIONS packets generated by natping
and it appears that at least in my implementation of OpenSer 1.0.0 the "To:
sip" line has no username which causes many UA's require in order to respond
to the OPTIONS packet. I was wondering if this was intentional or if it
would be possible to change this behavior or at least make it an
configurable option. I think a lot could be done/determined based on the
results of the reply; including determining if the packet is really reaching
the UA. I realize that some UA's may not support this feature but I think
more do than not.
Just my observations/thoughts. Please give me reasons for this being a good
or bad idea..
Current Packet:
U 2006/01/20 16:27:10.410848 111.15.13.67:5060 -> 111.16.187.102:5060
OPTIONS sip:111.16.187.102:5060 SIP/2.0.
Via: SIP/2.0/UDP 111.15.13.67:5060;branch=0.
From: sip:ping@intervoz.com.br;tag=ec30e9b7.
To: sip:111.16.187.102:5060.
Call-ID: b3fdcfa3-71a82db5-445151(a)111.15.13.67.
CSeq: 1 OPTIONS.
Content-Length: 0.
Suggested Packet:
U 2006/01/20 16:27:10.410848 111.15.13.67:5060 -> 111.16.187.102:5060
OPTIONS sip:<username from location table>@111.16.187.102:5060 SIP/2.0.
Via: SIP/2.0/UDP 111.15.13.67:5060;branch=0.
From: sip:ping@intervoz.com.br;tag=ec30e9b7.
To: sip:111.16.187.102:5060.
Call-ID: b3fdcfa3-71a82db5-445151(a)111.15.13.67.
CSeq: 1 OPTIONS.
Content-Length: 0.