El Miércoles, 10 de Febrero de 2010, Couret Tabt escribió: > Thank you, Castillo. > > At 3.2 in RFC3665, F2 407 is below: > > F2 407 Proxy Authorization Required Proxy 1 -> Alice > > SIP/2.0 407 Proxy Authorization Required > Via: SIP/2.0/TCP client.atlanta.example.com:5060;branch=z9hG4bK74b43 > ;received=192.0.2.101 > From: Alice <sip:[email protected]>;tag=9fxced76sl > To: Bob <sip:[email protected]>;tag=3flal12sf > Call-ID: [email protected] > CSeq: 1 INVITE > Proxy-Authenticate: Digest realm="atlanta.example.com", qop="auth", > nonce="f84f1cec41e6cbe5aea9c8e88d359", > opaque="", stale=FALSE, algorithm=MD5 > Content-Length: 0 > > In the above, there is no "Contact" header .
Of course, 4XX responses have no Contact as it's useless. > So I think Alice can NOT know even the full host name of Proxy1 > (ss1.atlanta.example.com). Alice doesn't know if the 407 comes from P1, P2 or whatever as Alice where P1 relayed the requests. > But Alice(UAC) can resend INVITE to the originator(Proxy1) > at F4 INVITE. > Why can Alice(UAC) do so? This is basically as Digest authentication works in SIP. Not sure if I understand what you mean in this last question. -- Iñaki Baz Castillo <[email protected]> _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
