rping -s [-vVd] [-S size] [-C count] [-a addr] [-p port]
rping -c [-vVd] [-S size] [-C count] [-I addr] -a addr [-p port]
	-c		client side
	-I		Source address to bind to for client.
	-s		server side.  To bind to any address with IPv6 use -a ::0
	-v		display ping data to stdout
	-V		validate ping data
	-d		debug printfs
	-S size 	ping data size
	-C count	ping count times
	-a addr		address
	-p port		port
	-P		persistent server mode allowing multiple connections
	-q		use self-created, self-modified QP