sponge

rednet.open("top")

local tArgs = {...}
local server = 0
local client = 0
local m = peripheral.wrap("left")

if #tArgs >= 2 then
  server = tonumber(tArgs[1])
  client = tonumber(tArgs[2])
else
  print([[You can also use "sponge <server> <client>" to only listen for specific ids.]])
end

term.clear()
term.setCursorPos(1,1)
m.clear()
m.setCursorPos(1,1)
print("Listening....")

while true do
  id, msg = rednet.receive()
  if server~=0 and client~=0 then
    if id==server or id==client then
          print(id..":"..msg)
    log = fs.open("log", "a")
    log.writeLine(id..":"..msg)
    log.close()
    end
  else
    print(id..":"..msg)
    log = fs.open("log", "a")
    log.writeLine(id..":"..msg)
    log.close()
  end
  term.redirect(m)
  term.restore()
end