[Asterisk-Users] SIP INVITE IP address variable?

[John Todd]

Perhaps this was already discussed in the archives, but due to the 
generic nature of the keywords I've been unable to find it.  My 
apologies if it's an easy answer.

I am looking for the variable or other method that will allow me to 
determine (from within the dialplan) the IP address of the origin of 
the SIP INVITE message for the current leg.  I know about $SIPURI - 
this is not sufficient.  That describes the SIP URI of the original 
requester.  I need to find the IP address which actually transmitted 
the final INVITE to Asterisk, regardless of the URI or any of the SIP 
headers.  Headers lie.  UDP packets don't.

Note: this is for any SIP INVITE, regardless of if the INVITE is 
received in [general] or if it has a specific peer entry.

JT