asterisk users - Jul 2006 - sendtext or sip message - where in RFC

I was looking in apps/sendtext.c hoping to find a reference
to the RFC number and section etc where  this is talked about.
Can someone point me where that information is for a SIP message?

THanks,

Jerry

> I was looking in apps/sendtext.c hoping to find a reference
> to the RFC number and section etc where this is talked about.
Because sendtext.c is not SIP specific you will not find a reference
to SIP related information there. chan_sip.c has a reference to RFC
3428 (http://www.rfc-editor.org/rfc/rfc3428.txt). Have a look at the
comment of the function receive_message() in chan_sip.c.

Fabian M?ller