80 lines
2.1 KiB
Lua
80 lines
2.1 KiB
Lua
local serial = require "serialization"
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local minitel = require "minitel"
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local event = require "event"
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local rpc = {}
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_G.rpcf = {}
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rpc.port = 111
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local function rpcexec(_, from, port, data)
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if port == rpc.port then
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local rpcrq = serial.unserialize(data)
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local rpcn, rpcid = table.remove(rpcrq,1), table.remove(rpcrq,1)
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if rpcf[rpcn] then
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local rt = {pcall(rpcf[rpcn],table.unpack(rpcrq))}
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if rt[1] == true then
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table.remove(rt,1)
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end
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minitel.send(from,port,serial.serialize({rpcid,table.unpack(rt)}))
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else
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end
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end
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end
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function rpcf.list()
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local rt = {}
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for k,v in pairs(rpcf) do
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rt[#rt+1] = k
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end
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return rt
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end
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function rpc.call(hostname,fn,...) -- string string -- boolean -- Calls exported function *fn* on host *hostname*, with parameters *...*, returning whatever the function returns, or false.
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if hostname == "localhost" then
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return rpcf[fn](...)
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end
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local rv = minitel.genPacketID()
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minitel.rsend(hostname,rpc.port,serial.serialize({fn,rv,...}),true)
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local st = computer.uptime()
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local rt = {}
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repeat
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local _, from, port, data = event.pull(30, "net_msg", hostname, rpc.port)
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rt = serial.unserialize(tostring(data)) or {}
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until (type(rt) == "table" and rt[1] == rv) or computer.uptime() > st + 30
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if table.remove(rt,1) == rv then
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return table.unpack(rt)
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end
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return false
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end
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function rpc.proxy(hostname,filter) -- string string -- table -- Returns a component.proxy()-like table from the functions on *hostname* with names matching *filter*.
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filter=(filter or "").."(.+)"
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local fnames = rpc.call(hostname,"list")
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if not fnames then return false end
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local rt = {}
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for k,v in pairs(fnames) do
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fv = v:match(filter)
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if fv then
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rt[fv] = function(...)
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return rpc.call(hostname,v,...)
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end
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end
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end
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return rt
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end
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function rpc.register(name,fn) -- string function -- -- Registers a function to be exported by the RPC library.
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local rpcrunning = false
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for k,v in pairs(os.tasks()) do
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if os.taskInfo(v).name == "rpc daemon" then
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rpcrunning = true
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end
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end
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if not rpcrunning then
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os.spawn(function()
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while true do
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rpcexec(event.pull("net_msg"))
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end
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end,"rpc daemon")
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end
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rpcf[name] = fn
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end
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return rpc
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