1
0
mirror of https://github.com/XeonSquared/OC-Copper.git synced 2024-11-23 09:58:06 +11:00

Hopefully maybe implement the reliability layer.

This commit is contained in:
gamemanj 2017-03-18 16:06:56 +00:00
parent aabbb554c6
commit d63ba8db06

View File

@ -11,25 +11,81 @@ local culib = require("culib")
return function (hostname, transmit, onRReceive, time) return function (hostname, transmit, onRReceive, time)
-- node.hostname should be used for hostname generally. -- node.hostname should be used for hostname generally.
local node local node
-- The maximum amount of timers (used to cap memory usage)
local tuningMaxTimers = 0x200
local tuningClearAntiduplicate = 120
local tuningAttempts = 8
local tuningAttemptTime = 4
-- Just an array, no special index.
-- Contents : {
-- trigger function,
-- expiry time
-- }
local timers = {}
-- Indexes are globalIds, values are timers for deleting entries out of this table.
local weAcked = {}
-- Indexes are globalIds, values are { successFunc, deathTimer }
local needsAck = {}
local function addTimer(trig, expi)
if #timers < tuningMaxTimers then
local t = {trig, expi}
table.insert(timers, t)
return t
end
return nil
end
local function killTimer(t)
for i = 1, #timers do
if timers[i] == t then
table.remove(timers, i)
return
end
end
end
local function gen3Random()
return string.char(math.random(256) - 1) .. string.char(math.random(256) - 1) .. string.char(math.random(256) - 1)
end
local function genGlobalId(port)
local low = math.abs(math.floor(port)) % 256
local high = math.abs(math.floor(port / 256)) % 256
local portD = string.char(high) .. string.char(low)
return portD .. gen3Random()
end
local onReceive = function (nfrom, nto, data) local onReceive = function (nfrom, nto, data)
if data:len() < 6 then return end if data:len() < 6 then return end
local port = data:byte(2) + (data:byte(1) * 256) local port = data:byte(2) + (data:byte(1) * 256)
if data:byte(7) == 0x0F then local tp = data:byte(7)
local globalId = data:sub(1, 5)
if tp == 0x00 then
onRReceive(nfrom, nto, port, data, true) onRReceive(nfrom, nto, port, data, true)
return return
end end
if nto ~= node.hostname then return end
if (tp == 0x01) and weAcked[nto .. globalId] then
-- Only send one acknowledgement per packet,
-- so timers aren't generated by external packets
-- Not a perfect system but, eh.
weAcked[nto .. globalId] = addTimer(function ()
weAcked[nto .. globalId] = nil
end, tuningClearAntiduplicate)
onRReceive(nfrom, nto, port, data, false)
node.output(nto, nfrom, data:sub(1, 6) .. "\x02")
end
if (tp == 0x02) and needsAck[nfrom .. globalId] then
needsAck[nfrom .. globalId][1](nfrom)
killTimer(needsAck[nfrom .. globalId][2])
needsAck[nfrom .. globalId] = nil
end
if nto ~= node.hostname then if nto ~= node.hostname then
return return
end end
end end
node = culib(hostname, transmit, onReceive, time) node = culib(hostname, transmit, onReceive, time)
-- Just an array, no special index.
-- Contents : {
-- trigger = function(),
-- expiry = time,
-- }
local timers = {}
local relib = {} local relib = {}
relib.refresh = function () relib.refresh = function ()
node.refresh() node.refresh()
@ -44,7 +100,26 @@ return function (hostname, transmit, onRReceive, time)
end end
end end
relib.input = node.input relib.input = node.input
relib.output = function () relib.output = function (nto, port, data, unreliable, onSucceed, onFailure)
local gid = genGlobalId(port)
if unreliable then
node.output(node.hostname, nto, gid .. "\x00\x00" .. data)
return
end end
local na = {onSucceed}
local attempt = -1
local doAttempt
doAttempt = function ()
attempt = attempt + 1
if attempt == tuningAttempts then
onFailure()
return
end
node.output(node.hostname, nto, gid .. string.char(attempt) .. "\x01" .. data)
na[2] = addTimer(doAttempt, tuningAttemptTime)
end
needsAck[nto .. gid] = na
doAttempt()
end
return relib
end end