#!/usr/bin/env lua

--[[
 * A tool to translate ralink driver config (*.dat) into OpenWrt
 * UCI files (/etc/config/wireless).
 *                                --- Hua Shao <nossiac@163.com>
 *
 * For UCI: http://wiki.openwrt.org/doc/techref/uci
 *          http://wiki.openwrt.org/doc/uci
 *
 * Copyright (C) 2015 Mediatek CO.,LTD. All rights reserved.
 *
]]

require "shuci"

T={}

if #arg < 1 then
    io.stderr:write("usage: dat2uci <datfile> [ucifile] \n")
    return false
end

local i,j = string.find(arg[1], ".dat")
if i then
    datfile = arg[1]
    ucifile = arg[2] or "/etc/config/wireless"
else
    ucifile = arg[1]
    datfile = arg[2]
end
print("ucifile="..ucifile)
print("datfile="..datfile)

_,_,device = string.find(datfile, "(%w+).dat")
print("device="..device)

local _2g_name = {"7601","7602","7603","7620","7623","7628","7688"}
for i=1, #_2g_name do
    if string.find(device, _2g_name[i]) then band = "2.4G" break else band = "5G" end
end

print("band="..band)


for line in io.lines(datfile) do
    -- print(line)
    i,j = string.find(line, "([^%s])")
    if i and j then
        ch = string.sub(line,i,j)

        if ch == "#" then
            -- print("<comment> "..line)
        else
            _,_,k,v = string.find(line, "%s*([%w_]+)%s*=%s*([^#]*)%s*")
            if k then
                -- print("<k-v> ",k,v)
                local t = {}
                T[k] = v
            end
        end
    end
end

uci = UCI:new()
uci:load(ucifile)


--[[ Device related configurations ]]


uci:set("wifi-device", device)
uci:set(device, "type", device)
uci:set(device, "vendor", "ralink")
uci:set(device, "band", band)

if T.AutoChannelSelect ~= 0 then
    uci:set(device, "channel", "0")
    uci:set(device, "autoch", T.AutoChannelSelect or "nil")
else
    uci:set(device, "channel", T.Channel or "nil")
    uci:set(device, "autoch", "0")
end
uci:set(device, "radio", T.RadioOn or "nil")
uci:set(device, "wifimode", T.WirelessMode or "nil")
-- bandwidth
if T.BW == 1 and T.VHT_BW == 1 then
    uci:set(device, "bw", "2")
elseif T.BW == 0 and T.VHT_BW == 0 then
    uci:set(device, "bw", "0")
else
    uci:set(device, "bw", "1")
end
uci:set(device, "country", T.CountryCode or "TW")
uci:set(device, "region", T.CountryRegion or "1")
uci:set(device, "bgprotect", T.BGProtection or "0")
uci:set(device, "beacon", T.BeaconPeriod or "100")
uci:set(device, "dtim", T.DtimPeriod or "1")
uci:set(device, "fragthres", T.FragThreshold or "2346")
uci:set(device, "rtsthres", T.RTSThreshold or "2347")
uci:set(device, "txpower", T.TxPower or "100")
uci:set(device, "txpreamble", T.TxPreamble or "0")
uci:set(device, "shortslot", T.ShortSlot or "1")
uci:set(device, "txburst", T.TxBurst or "1")
uci:set(device, "pktaggre", T.PktAggregate or "0")
uci:set(device, "ieee80211h", T.IEEE80211H or "0")
uci:set(device, "ht_bsscoexist", T.HT_BSSCoexistence or "0")
uci:set(device, "ht_extcha", T.HT_EXTCHA or "0")
uci:set(device, "ht_opmode", T.HT_OpMode or "0")
uci:set(device, "ht_gi", T.HT_GI or "1")
uci:set(device, "ht_rdg", T.HT_RDG or "0")
uci:set(device, "ht_stbc", T.HT_STBC or "0")
uci:set(device, "ht_amsdu", T.HT_AMSDU or "0")
uci:set(device, "ht_autoba", T.HT_AutoBA or "1")
uci:set(device, "ht_badec", T.HT_BADecline or "0")
uci:set(device, "ht_distkip", T.HT_DisallowTKIP or "0")
uci:set(device, "ht_ldpc", T.HT_LDPC or "1")
uci:set(device, "ht_txstream", T.HT_TxStream or "1")
uci:set(device, "ht_txstream", T.HT_RxStream or "1")
if band == "5G" then
    uci:set(device, "aregion", T.CountryRegionABand or "7")           -- 5G
    uci:set(device, "vht_stbc", T.VHT_STBC or "0")                    -- 5G
    uci:set(device, "vht_sgi", T.VHT_SGI or "1")                      -- 5G
    uci:set(device, "vht_bw_sig", T.VHT_BW_SIGNAL or "0")             -- 5G
    uci:set(device, "vht_ldpc", T.VHT_LDPC or "1")                    -- 5G
    uci:set(device, "vht_disnonvht", T.VHT_DisallowNonVHT or "0")     -- 5G
end

--uci:dump()
--[[ Interface related configurations. ]]

function split(inputstr, delimiter)
    if delimiter == nil then
            delimiter = "%s"
    end
    local t={} ; i=1
    for str in string.gmatch(inputstr, "([^"..delimiter.."]+)") do
            t[i] = str
            i = i + 1
    end
    return t
end


local i = 0 -- index of wifi-iface
local j = 0 -- index of wifi-iface with give devname

while j < tonumber(T.BssidNum) do
    if not uci:get("wifi-iface["..i.."]", "device") then
        if band == "2.4G" then
            uci:set("wifi-iface["..i.."]", "ra"..j)
            uci:set("wifi-iface["..i.."]", "ifname", "ra"..j)
        else
            uci:set("wifi-iface["..i.."]", "rai"..j)
            uci:set("wifi-iface["..i.."]", "ifname", "rai"..j)
        end
        uci:set("wifi-iface["..i.."]", "device", device)
    end
    if device == uci:get("wifi-iface["..i.."]", "device") then
        uci:set("wifi-iface["..i.."]", "ssid", loadstring("return T.SSID"..(j+1))())
        uci:set("wifi-iface["..i.."]", "hidden", T.HideSSID or "0")
        -- openwrt specific
        uci:set("wifi-iface["..i.."]", "mode", "ap")
        uci:set("wifi-iface["..i.."]", "network", "lan")

        -- encryption
        authmode = split(T.AuthMode, ";")
        if authmode[j+1] == "OPEN" then
            uci:set("wifi-iface["..i.."]", "encryption", "none")
        elseif authmode[j+1] == "WPAPSK" then
            uci:set("wifi-iface["..i.."]", "encryption", "psk")
            uci:set("wifi-iface["..i.."]", "key", loadstring("return T.WPAPSK"..(j+1))())
        elseif authmode[j+1] == "WPA2PSK" then
            uci:set("wifi-iface["..i.."]", "encryption", "psk2")
            uci:set("wifi-iface["..i.."]", "key", loadstring("return T.WPAPSK"..(j+1))())
        elseif authmode[j+1] == "WPA" then
            uci:set("wifi-iface["..i.."]", "encryption", "wpa")
        elseif authmode[j+1] == "WPA2" then
            uci:set("wifi-iface["..i.."]", "encryption", "wpa2")
        elseif authmode[j+1] == "WPA1WPA2" then
            uci:set("wifi-iface["..i.."]", "encryption", "wpa+wpa2")
        else
            uci:set("wifi-iface["..i.."]", "encryption", "open")
        end

        -- cipher
        --[[
        cipher = split(T.EncrypType, ";")
        if authmode[j+1] == "OPEN" then
            uci:set("wifi-iface["..i.."]", "cipher", "none")
        elseif cipher[j+1] == "AES" then
            uci:set("wifi-iface["..i.."]", "cipher", "ccmp")
        elseif cipher[j+1] == "TKIP" then
            uci:set("wifi-iface["..i.."]", "cipher", "tkip")
        elseif cipher[j+1] == "TKIPAES" then
            uci:set("wifi-iface["..i.."]", "cipher", "tkip+ccmp")
        else
            uci:set("wifi-iface["..i.."]", "cipher", "none")
        end ]]

        --uci:set("wifi-iface["..i.."]", "wepkey", "xx")
        if T.IEEE8021X == 1 then
            uci:set("wifi-iface["..i.."]", "auth_server", T.RADIUS_Server or "nil")
            uci:set("wifi-iface["..i.."]", "auth_port", T.RADIUS_Port or "nil")
            uci:set("wifi-iface["..i.."]", "auth_secret", "xx")
        end
        --uci:set("wifi-iface["..i.."]", "pmkcacheperiod", T.PMKCachePeriod or "nil")
        --uci:set("wifi-iface["..i.."]", "preauth", T.PreAuth or "nil")
        --uci:set("wifi-iface["..i.."]", "rekeyinteval", T.RekeyInterval or "nil")
        j = j + 1
    end
    i = i + 1
end

--uci:dump()
uci:save(ucifile)

return true