72 lines
2.2 KiB
Lua
72 lines
2.2 KiB
Lua
local computer = require "computer"
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local minitel = require "minitel"
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local event = require "event"
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local ufs = require "unionfs"
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local rpc = require "rpc"
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local netutil = {}
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function netutil.importfs(host,rpath,lpath) -- import filesystem *rpath* from *host* and attach it to *lpath*
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local px = rpc.proxy(host,rpath.."_")
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function px.getLabel()
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return host..":"..rpath
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end
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px.address = host..":"..rpath
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return fs.mount(lpath,px)
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end
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function netutil.exportfs(path) -- export the directory *path* over RPC
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local path = "/"..table.concat(fs.segments(path),"/")
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local px = ufs.create(path)
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for k,v in pairs(px) do
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rpc.register(path.."_"..k,v)
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print(path.."_"..k)
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end
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return true
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end
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function netutil.ping(addr,times,timeout, silent) -- Request acknowledgment from *addr*, waiting *timeout* seconds each try, and try *times* times. If *silent* is true, don't print status. Returns true if there was at least one successful ping, the number of successes, the number of failures, and the average round trip time.
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local times, timeout = times or 5, timeout or 30
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local success, fail, time, avg = 0, 0, 0, 0
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for i = 1, times do
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local ipt = computer.uptime()
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local pid = minitel.genPacketID()
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computer.pushSignal("net_send",1,addr,0,"ping",pid)
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local t,a = event.pull(timeout,"net_ack")
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if t == "net_ack" and a == pid then
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if not silent then print("Ping reply: "..tostring(computer.uptime()-ipt).." seconds.") end
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success = success + 1
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time = time + computer.uptime()-ipt
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avg = time / success
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else
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if not silent then print("Timed out.") end
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fail = fail + 1
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end
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end
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if not silent then print(string.format("%d packets transmitted, %d received, %0.0f%% packet loss, %0.1fs",times,success,fail/times*100,time)) end
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return success > 0, success, fail, avg
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end
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function netutil.nc(host,port)
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port = port or 22
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local socket = minitel.open(host,port)
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if not socket then return false end
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local b = ""
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os.spawn(function()
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repeat
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local b = socket:read("*a")
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if b and b:len() > 0 then
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io.write(b)
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end
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coroutine.yield()
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until socket.state ~= "open"
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end)
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repeat
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local b = io.read()
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if b and b:len() > 0 then
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socket:write(b.."\n")
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end
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until socket.state ~= "open"
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end
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return netutil
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