+//usage:#define arping_trivial_usage
+//usage: "[-fqbDUA] [-c CNT] [-w TIMEOUT] [-I IFACE] [-s SRC_IP] DST_IP"
+//usage:#define arping_full_usage "\n\n"
+//usage: "Send ARP requests/replies\n"
+//usage: "\n -f Quit on first ARP reply"
+//usage: "\n -q Quiet"
+//usage: "\n -b Keep broadcasting, don't go unicast"
+//usage: "\n -D Exit with 1 if DST_IP replies"
+//usage: "\n -U Unsolicited ARP mode, update your neighbors"
+//usage: "\n -A ARP answer mode, update your neighbors"
+//usage: "\n -c N Stop after sending N ARP requests"
+//usage: "\n -w TIMEOUT Seconds to wait for ARP reply"
+//usage: "\n -I IFACE Interface to use (default eth0)"
+//usage: "\n -s SRC_IP Sender IP address"
+//usage: "\n DST_IP Target IP address"
+