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Merge pull request #24 from booty-bumping/no-wired-repeat

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Avoid repeating packets to the same wired interface
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Izaya 2019-04-19 14:00:51 +10:00 committed by GitHub
commit 02e4eb1794
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2 changed files with 19 additions and 10 deletions
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27
OpenOS/etc/rc.d/minitel.lua
View File

@ -19,10 +19,11 @@ local event = require "event"
local component = require "component"
local computer = require "computer"
local serial = require "serialization"
local hostname = computer.address():sub(1,8)
local listener = false
cfg.debug = false
local modems = {}
cfg.debug = false
cfg.port = 4096
cfg.retry = 10
cfg.retrycount = 64
@ -91,7 +92,9 @@ function start()
f:close()
end
print("Hostname: "..hostname)
if listener then return end
if next(listeners) ~= nil then return end
modems={}
for a,t in component.list("modem") do
modems[#modems+1] = component.proxy(a)
@ -112,7 +115,7 @@ function start()
return npID
end
local function sendPacket(packetID,packetType,dest,sender,vPort,data)
local function sendPacket(packetID,packetType,dest,sender,vPort,data,repeatingFrom)
if rcache[dest] then
dprint("Cached", rcache[dest][1],"send",rcache[dest][2],cfg.port,packetID,packetType,dest,sender,vPort,data)
if component.type(rcache[dest][1]) == "modem" then
@ -123,10 +126,14 @@ function start()
else
dprint("Not cached", cfg.port,packetID,packetType,dest,sender,vPort,data)
for k,v in pairs(modems) do
if v.type == "modem" then
v.broadcast(cfg.port,packetID,packetType,dest,sender,vPort,data)
elseif v.type == "tunnel" then
v.send(packetID,packetType,dest,sender,vPort,data)
-- do not send message back to the wired or linked modem it came from
-- the check for tunnels is for short circuiting `v.isWireless()`, which does not exist for tunnels
if v.address ~= repeatingFrom or (v.type ~= "tunnel" and v.isWireless()) then
if v.type == "modem" then
v.broadcast(cfg.port,packetID,packetType,dest,sender,vPort,data)
elseif v.type == "tunnel" then
v.send(packetID,packetType,dest,sender,vPort,data)
end
end
end
end
@ -177,7 +184,7 @@ function start()
elseif dest:sub(1,1) == "~" then -- broadcasts start with ~
computer.pushSignal("net_broadcast",sender,vPort,data)
elseif cfg.route then -- repeat packets if route is enabled
sendPacket(packetID,packetType,dest,sender,vPort,data)
sendPacket(packetID,packetType,dest,sender,vPort,data,localModem)
end
if not rcache[sender] then -- add the sender to the rcache
dprint("rcache: "..sender..":", localModem,from,computer.uptime())
@ -233,10 +240,12 @@ end
function stop()
for k,v in pairs(listeners) do
event.ignore(k,v)
listeners[k] = nil
print("Stopped listener: "..tostring(v))
end
for k,v in pairs(timers) do
event.cancel(v)
timers[k] = nil
print("Stopped timer: "..tostring(v))
end
end

2
protocol-3.md
View File

@ -12,7 +12,7 @@ Upon a node receiving a message addressed to itself, it should:
2. Check if the packet is addressed to the node, and if so, queue it as a net_msg event
3. If the packet is indeed addressed to this node, and the packet type is 1 (reliable), send an acknowledgement packet.
4. Optional: Add the sender to the address cache if it isn't already in the cache
5. Optional: If the packet is addressed to a different node, repeat the packet, preferably respecting the address cache
5. Optional: If the packet is addressed to a different node, repeat the packet via all wireless modems and all wired/linked modems except the one receiving the packet, preferably respecting the address cache
If the packet is, for some reason invalid, simply drop the packet.