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97 lines
2.1 KiB
Lua
Executable File
97 lines
2.1 KiB
Lua
Executable File
#!/usr/bin/env lua
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local io = require "io"
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local os = require "os"
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local table = require "table"
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function trim (s)
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return (string.gsub(s, "^%s*(.-)%s*$", "%1"))
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end
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function split(delim, text)
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local list = {}
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if string.len(text) <= 0 then
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return list
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end
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delim = delim or ""
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local pos = 1
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-- if delim matches empty string then it would give an endless loop
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if string.find("", delim, 1) and delim ~= "" then
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error("delim matches empty string!")
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end
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local first, last
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while 1 do
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if delim ~= "" then
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first, last = string.find(text, delim, pos)
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else
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first, last = string.find(text, "%s+", pos)
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if first == 1 then
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pos = last+1
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first, last = string.find(text, "%s+", pos)
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end
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end
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if first then -- found?
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table.insert(list, string.sub(text, pos, first-1))
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pos = last+1
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else
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table.insert(list, string.sub(text, pos))
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break
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end
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end
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return list
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end
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function exec(command)
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local pp = io.popen(command)
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local data = pp:read("*a")
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pp:close()
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return data
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end
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function iwscan(iface)
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local siface = iface or ""
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local cnt = exec("iwlist "..siface.." scan 2>/dev/null")
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local iws = {}
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cnt = trim(cnt)
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for i, l in pairs(split("\n Cell", cnt)) do
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local ESSID = l:match("ESSID:\"(.-)\"")
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if ESSID then
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local Q = l:match("Quality[:=](.-)[ ]")
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local A = l:match("Authentication Suites.- : (.-)\n")
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local P = l:match("Pairwise Ciphers.- : (.-)\n")
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local enc
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if not l:find("Encryption key:on") then
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enc = "none"
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else
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local wpa = l:find("WPA Version 1")
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local rsn = l:find("WPA2 Version 1")
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if wpa and rsn then enc = "psk+psk2"
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elseif rsn then enc = "psk2"
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elseif wpa then enc = "psk"
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else enc = "wep" end
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end
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local a = Q:match("(%d-)/")
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local b = Q:match("/(%d-)$")
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Q = math.floor(tonumber(a)/tonumber(b)*100)
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local r = Q .. "%," .. ESSID .. "," .. enc
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table.insert(iws, r)
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end
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end
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return iws
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end
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local t = iwscan("wlan0")
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if t == {} then
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print();
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else
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for k,v in pairs(t) do print(v) end
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end
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