OC-PsychOS2/module/microtel-3.lua

_G.net={}

do
local modems,packetQueue,packetCache,routeCache,C,Y = {},{},{},{},COMPUTER,UNPACK
net.port,net.hostname,net.route,net.hook,U=4096,computer.address():sub(1,8),true,{},UPTIME

for a in component.list("modem") do
 modems[a] = component.proxy(a)
 modems[a].open(net.port)
end

local function genPacketID()
 local packetID = ""
 for i = 1, 16 do
  packetID = packetID .. string.char(math.random(32,126))
 end
 return packetID
end

local function rawSendPacket(packetID,packetType,to,from,vport,data)
 if routeCache[to] then
  modems[routeCache[to][1]].send(routeCache[to][2],net.port,packetID,packetType,to,from,vport,data)
 else
  for k,v in pairs(modems) do
   v.broadcast(net.port,packetID,packetType,to,from,vport,data)
  end
 end
end

local function sendPacket(packetID,packetType,to,vport,data)
 packetCache[packetID] = computer.uptime()
 rawSendPacket(packetID,packetType,to,net.hostname,vport,data)
end

function net.send(to,vport,data,packetType,packetID)
 packetType,packetID = packetType or 1, packetID or genPacketID()
 packetQueue[packetID] = {packetType,to,vport,data,0}
 sendPacket(packetID,packetType,to,vport,data)
end

local function checkCache(packetID)
 for k,v in pairs(packetCache) do
  if k == packetID then
   return false
  end
 end
 return true
end

os.spawn(function()
 while true do
  local eventTab = {coroutine.yield()}
  if eventTab[1] == "modem_message" and (eventTab[4] == net.port or eventTab[4] == 0) and checkCache(eventTab[6]) then
   for k,v in pairs(packetCache) do
    if computer.uptime() > v+30 then
     packetCache[k] = nil
    end
   end
   for k,v in pairs(routeCache) do
    if computer.uptime() > v[3]+30 then
     routeCache[k] = nil
    end
   end
   routeCache[eventTab[9]] = {eventTab[2],eventTab[3],computer.uptime()}
   if eventTab[8] == net.hostname then
    if eventTab[7] ~= 2 then
     computer.pushSignal("net_msg",eventTab[9],eventTab[10],eventTab[11])
     if eventTab[7] == 1 then
      sendPacket(genPacketID(),2,eventTab[9],eventTab[10],eventTab[6])
     end
    else
     packetQueue[eventTab[11]] = nil
    end
   elseif net.route and checkCache(eventTab[6]) then
    rawSendPacket(eventTab[6],eventTab[7],eventTab[8],eventTab[9],eventTab[10],eventTab[11])
   end
   packetCache[eventTab[6]] = computer.uptime()
  end
  for k,v in pairs(packetQueue) do
   if computer.uptime() > v[5] then
    sendPacket(k,table.unpack(v))
    v[5]=computer.uptime()+30
   end
  end
 end
end,"minitel.3")

end