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|
{-# LANGUAGE TypeApplications, CPP #-}
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Monitors.Wireless
-- Copyright : (c) Jose Antonio Ortega Ruiz
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Jose Antonio Ortega Ruiz
-- Stability : unstable
-- Portability : unportable
--
-- A monitor reporting SSID and signal level for wireless interfaces
--
-----------------------------------------------------------------------------
module Xmobar.Plugins.Monitors.Wireless (wirelessConfig, runWireless) where
import System.Console.GetOpt
import Data.Maybe (fromMaybe)
import Xmobar.Plugins.Monitors.Common
#ifdef IWLIB
import Network.IWlib
#elif defined USE_NL80211
import Control.Exception (bracket)
import qualified Data.Map as M
import GHC.Int (Int8)
import Data.Maybe (listToMaybe)
import Control.Monad.IO.Class (liftIO)
import Control.Monad.Trans.Maybe (MaybeT(..), runMaybeT)
import Data.ByteString.Char8 (unpack)
import Data.Serialize.Put (runPut, putWord32host, putByteString)
import Data.Serialize.Get (runGet)
import System.Linux.Netlink hiding (query)
import System.Linux.Netlink.GeNetlink.NL80211
import System.Linux.Netlink.GeNetlink.NL80211.StaInfo
import System.Linux.Netlink.GeNetlink.NL80211.Constants
import System.Posix.IO (closeFd)
data IwData = IwData { wiEssid :: String, wiSignal :: Maybe Int, wiQuality :: Int }
getWirelessInfo :: String -> IO IwData
getWirelessInfo ifname = do
bracket makeNL80211Socket (closeFd . getFd) (\s -> do
iflist <- getInterfaceList s
iwdata <- runMaybeT $ do
ifidx <- MaybeT . return $ foldr (\(n, i) z ->
if (ifname == "" || ifname == n) then Just i else z)
Nothing
iflist
scanp <- liftIO (getConnectedWifi s ifidx) >>=
MaybeT . return . listToMaybe
bssid <- MaybeT . return $ M.lookup eNL80211_ATTR_BSS (packetAttributes scanp) >>=
rightToMaybe . runGet getAttributes >>=
M.lookup eNL80211_BSS_BSSID
stap <- liftIO (query s eNL80211_CMD_GET_STATION True $ M.fromList
[(eNL80211_ATTR_IFINDEX, runPut $ putWord32host ifidx),
(eNL80211_ATTR_MAC, runPut $ putByteString bssid)]) >>=
MaybeT . return . listToMaybe
let ssid = fromMaybe "" $ getWifiAttributes scanp >>= M.lookup eWLAN_EID_SSID >>=
return . unpack
signal = staInfoFromPacket stap >>= staSignalMBM >>=
return . fromIntegral @Int8 . fromIntegral
qlty = fromMaybe (-1) (round @Float . (/ 0.7) . (+ 110) .
clamp (-110) (-40) . fromIntegral <$> signal)
MaybeT . return $ Just $ IwData ssid signal qlty
return $ fromMaybe (IwData "" Nothing (-1)) iwdata)
where
rightToMaybe = either (const Nothing) Just
clamp lb up v = if v < lb then lb else if v > up then up else v
#endif
newtype WirelessOpts = WirelessOpts
{ qualityIconPattern :: Maybe IconPattern
}
defaultOpts :: WirelessOpts
defaultOpts = WirelessOpts
{ qualityIconPattern = Nothing
}
options :: [OptDescr (WirelessOpts -> WirelessOpts)]
options =
[ Option "" ["quality-icon-pattern"] (ReqArg (\d opts ->
opts { qualityIconPattern = Just $ parseIconPattern d }) "") ""
]
wirelessConfig :: IO MConfig
wirelessConfig =
mkMConfig "<ssid> <quality>"
["ssid", "essid", "signal", "quality", "qualitybar", "qualityvbar", "qualityipat"]
runWireless :: String -> [String] -> Monitor String
runWireless iface args = do
opts <- io $ parseOptsWith options defaultOpts args
#ifdef IWLIB
iface' <- if "" == iface then io findInterface else return iface
#else
let iface' = iface
#endif
wi <- io $ getWirelessInfo iface'
na <- getConfigValue naString
let essid = wiEssid wi
qlty = fromIntegral $ wiQuality wi
e = if essid == "" then na else essid
ep <- showWithPadding e
#ifdef USE_NL80211
let s = wiSignal wi
#else
let s = if qlty >= 0 then Just (qlty * 0.7 - 110) else Nothing
#endif
sp <- showWithPadding $ fromMaybe "" (show <$> s)
q <- if qlty >= 0
then showPercentWithColors (qlty / 100)
else showWithPadding ""
qb <- showPercentBar qlty (qlty / 100)
qvb <- showVerticalBar qlty (qlty / 100)
qipat <- showIconPattern (qualityIconPattern opts) (qlty / 100)
parseTemplate [ep, ep, sp, q, qb, qvb, qipat]
#ifdef IWLIB
findInterface :: IO String
findInterface = do
c <- readFile "/proc/net/wireless"
let nds = lines c
return $ if length nds > 2 then takeWhile (/= 'c') (nds!!2) else []
#endif
|
