mirror of
https://github.com/zenith391/OCEmu.git
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Merge pull request #5 from payonel/develop
Modem component implementation.
This commit is contained in:
James Coon
commit
9953b72b60
@ -1,6 +1,343 @@
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local address, _, wireless = ...
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print(address, _, wireless);
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compCheckArg(1,wireless,"boolean")
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local socket = require("socket")
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local ser = require("loot.OpenOS.lib.serialization")
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-- yes, global
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modem_host = {}
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-- modem component
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local obj = {}
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-- Modem cards communicate on a real backend port
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modem_host.comms_port = 61234
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modem_host.comms_ip = "127.0.0.10"
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modem_host.connected = false
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modem_host.messages = {}
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modem_host.socket = nil
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modem_host.hosting = false
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modem_host.clients = {}
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-- [port_number] = true when open
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modem_host.open_ports = {}
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function modem_host.createPacketArray(t, address, port, ...)
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compCheckArg(1,t,type(""))
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compCheckArg(2,address,type(""),type(0))
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compCheckArg(3,port,type(0))
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local packed =
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{
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t,
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address,
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modem_host.id,
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port,
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0, -- distance
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...
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}
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return packed
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end
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function modem_host.packetArrayToPacket(packed)
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compCheckArg(1,packed,type({}))
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assert(#packed >= 5)
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local packet = {}
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packet.type = packed[1]
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packet.target = packed[2]
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packet.source = packed[3]
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packet.port = packed[4]
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packet.distance = packed[5]
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packet.payload = {}
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for i=6,#packed do
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table.insert(packet.payload, packed[i])
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end
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return packet
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end
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function modem_host.packetArrayToDatagram(packed)
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compCheckArg(1,packed,type({}))
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local datagram = ser.serialize(packed)
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return datagram .. '\n'
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end
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function modem_host.packetToPacketArray(packet)
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return
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{
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packet.type,
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packet.target,
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packet.source,
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packet.port,
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packet.distance,
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table.unpack(packet.payload or {})
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}
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end
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function modem_host.datagramToPacketArray(datagram)
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compCheckArg(1,datagram,type(""))
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local packed = ser.unserialize(datagram)
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return packed
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end
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function modem_host.datagramToPacket(datagram)
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local packed = modem_host.datagramToPacketArray(datagram)
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local packet = modem_host.packedToPacket(packed)
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return packet
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end
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function modem_host.packetToDatagram(packet)
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local packed = modem_host.packetToPacketArray(packet)
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local datagram = modem_host.packetArrayToDatagram(packed)
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return datagram
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end
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function modem_host.readDatagram(client) -- client:receive()
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local raw, err = client:receive()
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if raw then cprint("received: " .. raw) end
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return raw, err
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end
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function modem_host.readPacketArray(client) -- client:receive()
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local datagram, err = modem_host.readDatagram(client)
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if not datagram then return nil, err end
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return modem_host.datagramToPacketArray(datagram)
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end
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function modem_host.readPacket(client) -- client:receive()
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local packed, err = modem_host.readPacketArray(client)
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if not packed then return nil, err end
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return modem_host.packetArrayToPacket(packed)
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end
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function modem_host.sendDatagram(client, datagram)
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cprint("sending: " .. datagram)
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return client:send(datagram)
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end
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function modem_host.sendPacketArray(client, packed)
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local datagram = modem_host.packetArrayToDatagram(packed)
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return modem_host.sendDatagram(client, datagram)
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end
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function modem_host.sendPacket(client, packet)
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local datagram = modem_host.packetToDatagram(packet)
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return modem_host.sendDatagram(client, datagram)
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end
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function modem_host.broadcast(packet)
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-- only host broadcasts
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-- this method will be hit for all broadcasted messages
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-- but nonhosting clients will simply not repeat the broadcast
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if modem_host.hosting then
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local datagram = modem_host.packetToDatagram(packet)
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for addr,client in pairs(modem_host.clients) do
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modem_host.sendDatagram(client, datagram)
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end
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end
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end
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function modem_host.validTarget(target)
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if target == 0 then
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return true
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end
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if target == modem_host.id then
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return true
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end
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if not modem_host.hosting then
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return false
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end
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for address,client in pairs(modem_host.clients) do
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if address == target then
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return true
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end
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end
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return false
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end
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-- backend private methods, these are not pushed to user machine environments
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function modem_host.pushMessage(packet)
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if not modem_host.validTarget(packet.target) then
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return false, "invalid target, no such client listening" --ignored
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end
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table.insert(modem_host.messages, packet)
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return true
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end
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function modem_host.dispatchPacket(packet)
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if packet.target == modem_host.id then
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if obj.isOpen(packet.port) then
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table.insert(machine.signals, modem_host.packetToPacketArray(packet))
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end
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elseif modem_host.hosting then -- if hosting we will route
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for source,client in pairs(modem_host.clients) do
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if source == packet.target then
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modem_host.sendPacket(client, packet)
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break
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end
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end
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else -- not hosting, send to host
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modem_host.sendPacket(modem_host.socket, packet)
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end
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end
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function modem_host.processPendingMessages()
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-- computer address seems to be applied late
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if not modem_host.id then
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modem_host.id = component.list("computer",true)()
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assert(modem_host.id)
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end
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modem_host.recvPendingMessages()
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for _,packet in pairs(modem_host.messages) do
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if packet.type == 'modem_message' then
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-- broadcast if no target
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if packet.target == 0 then
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modem_host.broadcast(packet) -- ignored by clients
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-- clean up for broadcasting to self
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packet.target = modem_host.id
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end
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modem_host.dispatchPacket(packet)
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end
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end
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modem_host.messages = {}
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end
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function modem_host.recvPendingMessages()
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if modem_host.hosting then
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while true do
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local client = modem_host.socket:accept()
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if not client then
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break;
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end
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local handshake, err = modem_host.readPacket(client) -- client:receive()
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if not handshake then
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client:close()
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else
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local connectionResponse
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local accepted = false
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if handshake.type ~= "handshake" then
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connectionResponse = modem_host.createPacketArray("handshake", modem_host.id, -1,
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false, "unsupported message type");
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elseif modem_host.validTarget(handshake.source) then -- repeated client
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connectionResponse = modem_host.createPacketArray("handshake", modem_host.id, -1,
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false, "computer address conflict detected, ignoring connection");
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else
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client:settimeout(0, 't')
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modem_host.clients[handshake.source] = client
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accepted = true
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connectionResponse = modem_host.createPacketArray("handshake", modem_host.id, -1, true);
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end
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modem_host.sendPacketArray(client, connectionResponse)
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if not accepted then
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client:close()
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end
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end
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end
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-- recv all pending packets
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for source, client in pairs(modem_host.clients) do
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local packet, err = modem_host.readPacket(client)
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if packet then
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modem_host.pushMessage(packet)
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elseif err ~= "timeout" then
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client:close()
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modem_host.clients[source] = nil
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end
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end
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elseif modem_host.socket then
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while true do
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local packet, err = modem_host.readPacket(modem_host.socket)
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if packet then
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modem_host.pushMessage(packet)
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else
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break
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end
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end
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end
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end
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function modem_host.createNewMessageBoard()
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local why
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modem_host.socket, why = socket.bind(modem_host.comms_ip, modem_host.comms_port)
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if modem_host.socket then
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modem_host.hosting = true
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end
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return modem_host.socket, why
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end
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function modem_host.joinExistingMessageBoard()
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local why
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modem_host.socket, why = socket.connect(modem_host.comms_ip, modem_host.comms_port)
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if modem_host.socket then
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modem_host.hosting = nil
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-- send handshake data
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local packed = modem_host.createPacketArray("handshake", 0, -1)
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local sendResult = modem_host.sendPacketArray(modem_host.socket, packed)
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local response, why = modem_host.readPacket(modem_host.socket)
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assert(response)
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assert(response.payload)
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if not response.payload[1] then
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modem_host.socket:close()
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modem_host.socket = nil
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return false, response.payload[2], true
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end
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end
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return modem_host.socket, why
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end
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function modem_host.connectMessageBoard()
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if modem_host.connected then
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return true
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end
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local ok, info, critical = modem_host.joinExistingMessageBoard()
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if not ok and critical then
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return nil, info
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end
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if not ok then
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ok, info = modem_host.createNewMessageBoard()
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end
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if not ok then
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return nil, info
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end
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modem_host.socket:settimeout(0, 't') -- accept calls must be already pending
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modem_host.connected = true
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modem_host.clients = {}
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modem_host.messages = {}
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return true
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end
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local wakeMessage
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local strength
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if wireless then
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@ -14,78 +351,104 @@ local function checkPort(port)
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return math.floor(port)
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end
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-- modem component
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local obj = {}
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function obj.send(address, port, ...) -- Sends the specified data to the specified target.
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--STUB
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cprint("modem.send",address, port, ...)
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compCheckArg(1,address,"string")
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compCheckArg(2,port,"number")
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port=checkPort(port)
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return true
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local packed = modem_host.createPacketArray("modem_message", address, port, ...)
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local packet = modem_host.packetArrayToPacket(packed)
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return modem_host.dispatchPacket(packet)
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end
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function obj.getWakeMessage() -- Get the current wake-up message.
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--STUB
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cprint("modem.getWakeMessage")
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return wakeMessage
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end
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function obj.setWakeMessage(message) -- Set the wake-up message.
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--STUB
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cprint("modem.setWakeMessage",message)
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compCheckArg(1,message,"string","nil")
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wakeMessage = message
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end
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function obj.close(port) -- Closes the specified port (default: all ports). Returns true if ports were closed.
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--STUB
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cprint("modem.close",port)
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compCheckArg(1,port,"number","nil")
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if port ~= nil then
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port=checkPort(port)
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end
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return false
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if not obj.isOpen(port) then
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return false;
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end
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modem_host.open_ports[port] = nil
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return true
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end
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function obj.maxPacketSize() -- Gets the maximum packet size (config setting).
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cprint("modem.maxPacketSize")
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return settings.maxNetworkPacketSize
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end
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if wireless then
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function obj.getStrength() -- Get the signal strength (range) used when sending messages.
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--STUB
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cprint("modem.getStrength")
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return strength
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end
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function obj.setStrength(newstrength) -- Set the signal strength (range) used when sending messages.
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--STUB
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cprint("modem.setStrength",newstrength)
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compCheckArg(1,newstrength,"number")
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strength = newstrength
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end
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end
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function obj.isOpen(port) -- Whether the specified port is open.
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--STUB
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cprint("modem.isOpen",port)
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compCheckArg(1,port,"number")
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return false
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return modem_host.open_ports[port] ~= nil
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end
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function obj.open(port) -- Opens the specified port. Returns true if the port was opened.
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--STUB
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cprint("modem.open",port)
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compCheckArg(1,port,"number")
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port=checkPort(port)
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return false
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if obj.isOpen(port) then
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return false, "port already open"
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end
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-- make sure we are connected to the message board
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local ok, why = modem_host.connectMessageBoard()
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if not ok then
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return false, why
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end
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modem_host.open_ports[port] = true
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return true
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end
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function obj.isWireless() -- Whether this is a wireless network card.
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--STUB
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cprint("modem.isWireless")
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return wireless
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end
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function obj.broadcast(port, ...) -- Broadcasts the specified data on the specified port.
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--STUB
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cprint("modem.broadcast",port, ...)
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compCheckArg(1,port,"number")
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port=checkPort(port)
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return true
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-- we cannot broadcast unless we are connected to the message board
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if not modem_host.connectMessageBoard() then
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return false
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end
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local packed = modem_host.createPacketArray("modem_message", 0, port, ...)
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local packet = modem_host.packetArrayToPacket(packed)
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return modem_host.dispatchPacket(packet)
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end
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local cec = {}
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@ -49,6 +49,7 @@ if settings.components == nil then
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-- Read component files for parameter documentation
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settings.components = {
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{"gpu",nil,0,160,50,3},
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{"modem",nil,1,false},
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{"eeprom",nil,9,"lua/bios.lua"},
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{"filesystem",nil,7,"loot/OpenOS",true},
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{"filesystem",nil,nil,"tmpfs",false},
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@ -313,6 +314,9 @@ function elsa.update(dt)
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table.remove(kbdcodes,1)
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table.insert(machine.signals,{kbdcode.type,kbdcode.addr,kbdcode.char or 0,kbdcode.code})
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end
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if modem_host then
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modem_host.processPendingMessages()
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end
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if #machine.signals > 0 then
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signal = machine.signals[1]
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table.remove(machine.signals, 1)
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