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-- dns_client.lua


local modemSide = "left"


while not peripheral.isPresent(modemSide) or peripheral.getType(modemSide) ~= "modem" do
  print("Waiting for modem on side '" .. modemSide .. "'...")
  sleep(1)
end


rednet.open(modemSide)
print("Rednet opened on side '" .. modemSide .. "'")


local myName = "webServer"


while peripheral.isPresent(modemSide) do
  -- 4a) בקשה לקבלת IP ייחודי
  rednet.broadcast({ cmd = "requestIP", name = myName }, "DNS")
  local sender, reply = rednet.receive("DNS", 5)

  if reply and reply.ip then
    print("Assigned IP:", reply.ip)
  else
    print("Registration failed, retrying in 5 seconds...")
    sleep(5)
    goto continue
  end


  write("Enter hostname to resolve (or leave blank to skip): ")
  local target = read()
  if target ~= "" then
    rednet.broadcast({ cmd = "resolve", name = target }, "DNS")
    local _, r2 = rednet.receive("DNS", 5)
    if r2 and r2.ip then
      print(target .. " → " .. r2.ip)
    else
      print("No record for '" .. target .. "'")
    end
  end

  ::continue::
  -- 4c) המתן קצת לפני הלולאה הבאה
  sleep(2)
end

print("Modem disconnected; client stopping.")