At 10:28 AM -0700 10/22/01, Nathan Meyers wrote: >Whether messing with keepalives will give you the ping functionality >you really want... that's another question. Keepalive is a TCP option, >and "ping" usually implies a particular ICMP (!= TCP) protocol request >and response.
Well, if what he's trying to do is monitor the connection status of another machine using a TCP connection, using SO_KEEPALIVE will do it. I'm unsure if there's any way to be notified when a keepalive request is sent and acknowledged (I suspect there is if you dig deep enough) but even without that, the connection will be automatically closed if the other side of the connection stops responding to the keepalive. Actually, it's quite possible that the actual SO_KEEPALIVE request is done out-of-band using an ICMP message, since ICMP messages are used to report error and status conditions for TCP connections, as far as I know. Avi Cherry ---------------------------------------------------------------------- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
