On Wednesday 01 November 2006 20:08, Tomasz Sterna wrote: > On 11/1/06, Scott Robinson <[EMAIL PROTECTED]> wrote: > > What is the proper method of performing a ping across a client XMPP > > connection. That is, from a sever's perspective, if a client > > mysteriously and unexpectedly drops off the Internet, it won't know it > > until the TCP connection times out. > > Isn't TCP enough to handle the situation? > Why do you need to implement it on application level?
If 2 machines are connected over TCP/IP connection and there is one or more firewalls in between, try to power-off one of the machines. Another side will not notice connection drop. Default TCP/IP timeout is 300sec. This kind of "power-off" disconnections happen surprisingly often. And this is especially problem for network servers serving many simultaneous connections as such clients reconnect in a few seconds so server ends up with many dead connections... Artur -- Artur Hefczyc http://www.tigase.org/ http://wttools.sf.net/
