Hi all, We find many SIP messages are not containg 'userinfo' in its Contact header field. According to RFC3261, Contact header must contain SIP-URI or SIPS-URI, and its BNF form is as following.
SIP-URI = "sip:" [ userinfo ] hostport uri-parameters [ headers ] userinfo = ( user / telephone-subscriber ) [ ":" password ] "@" Case A Contact: <sip:[EMAIL PROTECTED]> Case B Contact: <sip:sipimplementors.com> My understanding is that as 'userinfo' is optional, it "may" be OK not to have it in Contact header as shown in Case B. I think, however, that there must be some cases where userinfo is mandatory. Can anybody clear this issue? I am still wondering whether to put userinfo or not. Many thanks, Sungwoo _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
