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@111.15.13.67.

CSeq: 1 OPTIONS.

Content-Length: 0.

Suggested Packet: