[Users] missing contact header

[Fatih Cerit]

Hi
I want to overwrite the contact header field using textops but some UAs send only an asterisk as a contact (like below). Is this defined in protocol (I didn't find) ? I don't decide what to do . Do I reply with an error or use another field (from,to) as contact 

thanks  


REGISTER sip:sip.anywhere.com SIP/2.0
Via: SIP/2.0/UDP 10.0.0.49;branch=z9hG4bK8eaa0451724f9bf4
From: "test" <sip:11223344 at sip.anywhere.com;user=phone>;tag=9969d7f94927b840
To: <sip:11223344 at sip.anywhere.com;user=phone>
Contact: *
Call-ID: 0c55cf4a80b02370 at 10.0.0.9
CSeq: 100 REGISTER
Expires: 0
User-Agent: Grandstream HT286 1.0.5.11
Max-Forwards: 70
Allow: INVITE,ACK,CANCEL,BYE,NOTIFY,REFER,OPTIONS,INFO,SUBSCRIBE
Content-Length: 0
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