I think it is encouraged this way so that the SIP stack can have its own timeout. Some TCP/IP stacks take a while to timeout and the timeout on a TCP/IP stack isn't always configurable on a "per TCP connection" basis.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Iñaki Baz Castillo Sent: 06 November 2008 11:40 To: SIPImplementors Mailing list Subject: [Sip-implementors] Why TCP keep-alive (PingPong) requires registrarreplyng single CRLF? Hi, TCP keep-alive (PingPong) works as follows: - The client, after registering, sends periodically double CRLF to the registrar. - The registrar replies single CRLF. Why is required the registrar replying single CRLF in order to mantain the TCP connection open? Wouldn't be enough with the client sending CRLF CRLF? Thanks. -- Iñaki Baz Castillo <[EMAIL PROTECTED]> _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
