import some packages from the main system
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49c0b930f9
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197
vcomponent/lib/vcomponent.lua
Normal file
197
vcomponent/lib/vcomponent.lua
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@ -0,0 +1,197 @@
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local proxylist = {}
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local proxyobjs = {}
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local typelist = {}
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local doclist = {}
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local oproxy = component.proxy
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function component.proxy(address)
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checkArg(1,address,"string")
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if proxyobjs[address] ~= nil then
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return proxyobjs[address]
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end
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return oproxy(address)
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end
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local olist = component.list
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function component.list(filter, exact)
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checkArg(1,filter,"string","nil")
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local result = {}
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local data = {}
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for k,v in olist(filter, exact) do
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data[#data + 1] = k
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data[#data + 1] = v
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result[k] = v
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end
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for k,v in pairs(typelist) do
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if filter == nil or (exact and v == filter) or (not exact and v:find(filter, nil, true)) then
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data[#data + 1] = k
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data[#data + 1] = v
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result[k] = v
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end
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end
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local place = 1
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return setmetatable(result,
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{__call=function()
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local addr,type = data[place], data[place + 1]
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place = place + 2
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return addr, type
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end}
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)
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end
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local otype = component.type
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function component.type(address)
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checkArg(1,address,"string")
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if typelist[address] ~= nil then
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return typelist[address]
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end
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return otype(address)
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end
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local odoc = component.doc
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function component.doc(address, method)
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checkArg(1,address,"string")
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checkArg(2,method,"string")
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if proxylist[address] ~= nil then
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if proxylist[address][method] == nil then
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error("no such method",2)
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end
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if doclist[address] ~= nil then
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return doclist[address][method]
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end
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return nil
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end
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return odoc(address, method)
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end
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local oslot = component.slot
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function component.slot(address)
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checkArg(1,address,"string")
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if proxylist[address] ~= nil then
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return -1 -- vcomponents do not exist in a slot
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end
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return oslot(address)
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end
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local omethods = component.methods
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function component.methods(address)
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checkArg(1,address,"string")
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if proxylist[address] ~= nil then
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local methods = {}
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for k,v in pairs(proxylist[address]) do
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if type(v) == "function" then
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methods[k] = true -- All vcomponent methods are direct
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end
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end
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return methods
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end
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return omethods(address)
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end
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local oinvoke = component.invoke
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function component.invoke(address, method, ...)
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checkArg(1,address,"string")
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checkArg(2,method,"string")
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if proxylist[address] ~= nil then
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if proxylist[address][method] == nil then
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error("no such method",2)
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end
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return proxylist[address][method](...)
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end
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return oinvoke(address, method, ...)
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end
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local ofields = component.fields
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function component.fields(address)
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checkArg(1,address,"string")
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if proxylist[address] ~= nil then
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return {} -- What even is this?
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end
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return ofields(address)
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end
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local componentCallback =
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{
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__call = function(self, ...) return proxylist[self.address][self.name](...) end,
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__tostring = function(self) return (doclist[self.address] ~= nil and doclist[self.address][self.name] ~= nil) and doclist[self.address][self.name] or "function" end
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}
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local vcomponent = {}
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function vcomponent.register(address, ctype, proxy, doc)
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checkArg(1,address,"string")
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checkArg(2,ctype,"string")
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checkArg(3,proxy,"table")
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if proxylist[address] ~= nil then
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return nil, "component already at address"
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elseif component.type(address) ~= nil then
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return nil, "cannot register over real component"
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end
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proxy.address = address
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proxy.type = ctype
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local proxyobj = {}
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for k,v in pairs(proxy) do
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if type(v) == "function" then
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proxyobj[k] = setmetatable({name=k,address=address},componentCallback)
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else
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proxyobj[k] = v
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end
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end
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proxylist[address] = proxy
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proxyobjs[address] = proxyobj
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typelist[address] = ctype
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doclist[address] = doc
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computer.pushSignal("component_added",address,ctype)
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return true
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end
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function vcomponent.unregister(address)
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checkArg(1,address,"string")
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if proxylist[address] == nil then
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if component.type(address) ~= nil then
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return nil, "cannot unregister real component"
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else
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return nil, "no component at address"
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end
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end
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local thetype = typelist[address]
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proxylist[address] = nil
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proxyobjs[address] = nil
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typelist[address] = nil
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doclist[address] = nil
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computer.pushSignal("component_removed",address,thetype)
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return true
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end
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function vcomponent.list()
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local list = {}
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for k,v in pairs(proxylist) do
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list[#list + 1] = {k,typelist[k],v}
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end
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return list
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end
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function vcomponent.resolve(address, componentType)
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checkArg(1, address, "string")
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checkArg(2, componentType, "string", "nil")
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for k,v in pairs(typelist) do
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if componentType == nil or v == componentType then
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if k:sub(1, #address) == address then
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return k
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end
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end
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end
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return nil, "no such component"
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end
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local r = math.random
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function vcomponent.uuid()
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return string.format("%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
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r(0,255),r(0,255),r(0,255),r(0,255),
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r(0,255),r(0,255),
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r(64,79),r(0,255),
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r(128,191),r(0,255),
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r(0,255),r(0,255),r(0,255),r(0,255),r(0,255),r(0,255))
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end
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return vcomponent
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3
vcomponent/package.cfg
Normal file
3
vcomponent/package.cfg
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{["name"]="vComponent",
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["description"]="Library for creating virtual component devices.",
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["authors"]="gamax92"}
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63
vtunnel/lib/interminitel.lua
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63
vtunnel/lib/interminitel.lua
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local imt = {}
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imt.ttypes = {}
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imt.ttypes.string=1
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imt.ttypes.number=2
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imt.ftypes = {tostring,tonumber}
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function imt.to16bn(n)
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return string.char(math.floor(n/256))..string.char(math.floor(n%256))
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end
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function imt.from16bn(s)
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return (string.byte(s,1,1)*256)+string.byte(s,2,2)
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end
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function imt.encodePacket(...)
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local tArgs = {...}
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local packet = string.char(#tArgs%256)
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for _,segment in ipairs(tArgs) do
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local segtype = type(segment)
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segment = tostring(segment)
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packet = packet .. imt.to16bn(segment:len()) .. string.char(imt.ttypes[segtype]) .. tostring(segment)
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end
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packet = imt.to16bn(packet:len()) .. packet
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return packet
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end
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function imt.decodePacket(s)
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local function getfirst(n)
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local ns = s:sub(1,n)
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s=s:sub(n+1)
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return ns
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end
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if s:len() < 2 then return false end
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local plen = imt.from16bn(getfirst(2))
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local segments = {}
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if s:len() < plen then return false end
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local nsegments = string.byte(getfirst(1))
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--print(tostring(plen).." bytes, "..tostring(nsegments).." segments")
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for i = 1, nsegments do
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local seglen = imt.from16bn(getfirst(2))
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local segtype = imt.ftypes[string.byte(getfirst(1))]
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local segment = segtype(getfirst(seglen))
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--print(seglen,segtype,segment,type(segment))
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segments[#segments+1] = segment
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end
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return table.unpack(segments)
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end
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function imt.getRemainder(s)
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local function getfirst(n)
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local ns = s:sub(1,n)
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s=s:sub(n+1)
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return ns
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end
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local plen = imt.from16bn(getfirst(2))
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if s:len() > plen then
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getfirst(plen)
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return s
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end
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return nil
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end
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return imt
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4
vtunnel/package.cfg
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4
vtunnel/package.cfg
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{["name"]="vTunnel",
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["description"]="Virtual tunnel card over TCP",
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["authors"]="Izaya",
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["dependencies"]={"vcomponent"}}
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162
vtunnel/service/vtunnel.lua
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162
vtunnel/service/vtunnel.lua
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local vcomponent = require "vcomponent"
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local serial = require "serialization"
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local component = require "component"
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local computer = require "computer"
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local event = require "event"
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local imt = require "interminitel"
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local cfg = {}
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cfg.peers = {}
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cfg.rtimer = 5
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cfg.katimer = 30
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local listeners = {}
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local proxies = {}
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local function loadcfg()
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local f = io.open("/boot/cfg/vtunnel.cfg","rb")
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if not f then return false end
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for k,v in pairs(serial.unserialize(f:read("*a")) or {}) do
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cfg[k] = v
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end
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f:close()
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end
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local function savecfg()
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local f = io.open("/boot/cfg/vtunnel.cfg","wb")
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if not f then
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print("Warning: unable to save configuration.")
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return false
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end
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f:write(serial.serialize(cfg))
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f:close()
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end
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local function createTunnel(host,port,addr,raddr)
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local proxy = {address=addr,buffer=""}
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function proxy.connect()
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if proxy.socket then
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proxy.socket.close()
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end
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proxy.socket = component.invoke(component.list("internet")(),"connect",host,port)
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local st = computer.uptime()
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repeat
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coroutine.yield()
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until proxy.socket.finishConnect() or computer.uptime() > st+5
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end
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function proxy.send(...)
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rt = 0
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while not proxy.socket.write(imt.encodePacket(...)) and rt < 10 do
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proxy.connect()
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rt = rt + 1
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end
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proxy.last = computer.uptime()
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end
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function proxy.read()
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local rb, r
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local rt = 0
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while true do
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rb,r = proxy.socket.read(4096)
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if rb or rt > 10 then break end
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if type(rb) == "nil" then
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proxy.connect()
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end
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rt = rt + 1
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end
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proxy.buffer = proxy.buffer .. rb
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while imt.decodePacket(proxy.buffer) do
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computer.pushSignal("modem_message",addr,raddr,0,0,imt.decodePacket(proxy.buffer))
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proxy.buffer = imt.getRemainder(proxy.buffer) or ""
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end
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if computer.uptime() > proxy.last + cfg.katimer then
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proxy.socket.write("\0\1\0")
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proxy.last = computer.uptime()
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end
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end
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function proxy.getWakeMessage()
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return false
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end
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proxy.setWakeMessage = proxy.getWakeMessage
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function proxy.maxPacketSize()
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return 8192
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end
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function proxy.getChannel()
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return host..":"..tostring(port)
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end
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proxy.connect()
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proxy.last = computer.uptime()
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return proxy
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end
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vt = {}
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function start()
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loadcfg()
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for k,v in pairs(cfg.peers) do
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print(string.format("Connecting to %s:%d",v.host,v.port))
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v.addr = v.addr or vcomponent.uuid()
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v.raddr = v.raddr or vcomponent.uuid()
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local px = createTunnel(v.host, v.port, v.addr, v.raddr)
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vcomponent.register(v.addr, "tunnel", px)
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proxies[v.addr] = px
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end
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for k,v in pairs(os.tasks()) do
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if os.taskInfo(v).name:match("minitel") then
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os.kill(v)
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end
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end
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end
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function vt.stop()
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for k,v in pairs(proxies) do
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vcomponent.unregister(k)
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end
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end
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function vt.listpeers()
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for k,v in pairs(cfg.peers) do
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print(string.format("#%d (%s:%d)\n Local address: %s\n Remote address: %s",k,v.host,v.port,v.addr,v.raddr))
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end
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end
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function vt.addpeer(host,port)
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port = tonumber(port) or 4096
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local t = {}
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t.host = host
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t.port = port
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t.addr = vcomponent.uuid()
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t.raddr = vcomponent.uuid()
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cfg.peers[#cfg.peers+1] = t
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print(string.format("Added peer #%d (%s:%d) to the configuration.\nRestart to apply changes.",#cfg.peers,host,port))
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savecfg()
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end
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function vt.delpeer(n)
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n=tonumber(n)
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if not n then
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print("delpeer requires a number, representing the peer number, as an argument.")
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return false
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end
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local dp = table.remove(cfg.peers, n)
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savecfg()
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print(string.format("Removed peer %s:%d",dp.host, dp.port))
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end
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function vt.settimer(time)
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time = tonumber(time)
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if not time then
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print("Timer must be a number.")
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return false
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end
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cfg.rtime = time
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savecfg()
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end
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vt.start = start
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_G.libs.vtunnel = vt
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start()
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local last = computer.uptime()
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while true do
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local tE = {coroutine.yield()}
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if computer.uptime() > last + cfg.rtimer then
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for k,v in pairs(proxies) do
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v.read()
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end
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last = computer.uptime()
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end
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end
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