local minitel = require "minitel"
local event = require "event"
local tArgs = {...}
local addr = tArgs[1]
local times = tonumber(tArgs[2]) or 5
local timeout = tonumber(tArgs[3]) or 30
for i = 1, times do
 local ipt = computer.uptime()
 local pid = minitel.genPacketID()
 computer.pushSignal("net_send",1,addr,0,"ping",pid)
 local t,a = event.pull(timeout,"net_ack")
 if t == "net_ack" and a == pid then
  print("Ping reply: "..tostring(computer.uptime()-ipt).." seconds.")
 else
  print("Timed out.")
 end
end