ping.

[Can Altineller <altine@yacht.ee.fit.edu>]

	Hello;

	In a ICMP_ECHO_REQUEST the identifier field is set to the PID of
the process sending the ICMP_ECHO_REQUEST according to stevens book.

	However in OpenBSD the identifier field is different every time
that a ICMP_ECHO_REQUEST|REPLY is sent. In FreeBSD it is not the same, but
it is sequential. (increases by one)

	Let's say Theo coded this differently then other *BSD's to confuse
the fuck out of me; then how does the ping program, or any other program
that sends ICMP's keep track of them? 

	Can someone explain me what is going on please?

	Thank you.
	-C.Altineller <altine@ee.fit.edu>