Pinger

network = require("network")
event = require("event")
computer = require("computer")
send_payload = "mothertrucking"

toping = {"EnderRemote", "EnderOne", "EnderTwo", "EnderThree", "SuperServer", "SuperTablet", "FileServer"}
pingids = {}

function process_ping(e, addr, id, payload)
name = pingids[id].host
time = pingids[id].time
time = computer.uptime()-time
print(name.." ["..addr.."]".. "  "..time)
if payload ~= send_payload then print("Warning, Payload bad: "..payload) end
end

event.listen("ping_reply", process_ping)

for index,host in pairs(toping) do
pid = network.icmp.ping(host, send_payload)
pingids[pid] = {host=host, time=computer.uptime()}
end