/usr/bin/udpong: invalid option -- '-'
usage: /usr/bin/udpong
	[-s server_address]
	[-b bind_address]
	[-B buffer_size]
	[-C transfer_count]
	[-S transfer_size]
	[-p port_number]
	[-T test_option]
	    s|sockets - use standard tcp/ip sockets
	    a|async - asynchronous operation (use poll)
	    b|blocking - use blocking calls
	    n|nonblocking - use nonblocking calls
	    e|echo - server echoes all messages