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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,133 @@ #! /bin/sh ### BEGIN INIT INFO # Provides: wifi_watchdog # Required-Start: $remote_fs $syslog # Required-Stop: $remote_fs $syslog # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: Watchdog service for Wi-Fi # Description: This script ping the router every N seconds and if it fails # tries to restore the network connection. ### END INIT INFO # this file goes in /etc/init.d/ # Author: Giulio Montagner # Do NOT "set -e" # PATH should only include /usr/* if it runs after the mountnfs.sh script DESC="Description of the service" NAME=wifi_watchdog DAEMON=/root/$NAME.sh DAEMON_PS=/[r]oot/$NAME.sh DAEMON_ARGS="--options args" PIDFILE=/var/run/$NAME.pid SCRIPTNAME=/etc/init.d/$NAME #Include functions . /lib/lsb/init-functions # # Function that starts the daemon/service # do_start() { # Return # 0 if daemon has been started # 1 if daemon was already running # 2 if daemon could not be started # make sure we aren't running already what=$(basename $DAEMON) for p in `ps h -o pid -C $what`; do if [ $p != $$ ]; then return 1 fi done $DAEMON & return 0 } # # Function that stops the daemon/service # do_stop() { # Return # 0 if daemon has been stopped # 1 if daemon was already stopped # 2 if daemon could not be stopped # other if a failure occurred kill -9 $(ps aux | grep "$DAEMON_PS" | awk '{print $2}') } # # Function that sends a SIGHUP to the daemon/service # do_reload() { # # If the daemon can reload its configuration without # restarting (for example, when it is sent a SIGHUP), # then implement that here. # return 0 } case "$1" in start) [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME" do_start case "$?" in 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;; 2) [ "$VERBOSE" != no ] && log_end_msg 1 ;; esac ;; stop) [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME" do_stop case "$?" in 0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;; 2) [ "$VERBOSE" != no ] && log_end_msg 1 ;; esac ;; status) ps aux | grep "$DAEMON_PS" ;; #reload|force-reload) # # If do_reload() is not implemented then leave this commented out # and leave 'force-reload' as an alias for 'restart'. # #log_daemon_msg "Reloading $DESC" "$NAME" #do_reload #log_end_msg $? #;; restart|force-reload) # # If the "reload" option is implemented then remove the # 'force-reload' alias # log_daemon_msg "Restarting $DESC" "$NAME" do_stop case "$?" in 0|1) do_start case "$?" in 0) log_end_msg 0 ;; 1) log_end_msg 1 ;; # Old process is still running *) log_end_msg 1 ;; # Failed to start esac ;; *) # Failed to stop log_end_msg 1 ;; esac ;; *) #echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2 echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2 exit 3 ;; esac : This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,45 @@ #!/bin/bash # source: http://raspberrypi.stackexchange.com/a/5121 # make sure we aren't running already what=`basename $0` for p in `ps h -o pid -C $what`; do if [ $p != $$ ]; then exit 0 fi done # source configuration wlan=wlan0 #set router ip = gateway router_ip=$(route -n | grep 'wlan0$' | grep '^0\.0\.0\.0' | awk '{print $2}') log=/var/log/wifi.log check_interval=120 exec 1> /dev/null exec 2>> $log echo $(date) > $log # without check_interval set, we risk a 0 sleep = busy loop if [ ! "$check_interval" ]; then echo "No check interval set!" >> $log exit 1 else sleep $check_interval fi restartWifi () { dhclient -v -r # make really sure killall dhclient ifconfig $wlan down ifconfig $wlan up #launch script to connect wifi /root/load_wifi.sh & } while [ 1 ]; do ping -c 1 $router_ip & wait $! if [ $? != 0 ]; then echo $(date)" attempting restart..." >> $log restartWifi fi sleep $check_interval done -
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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersOriginal file line number Diff line number Diff line change @@ -0,0 +1,97 @@ #!/bin/bash WPA_SUPPLICANT_CONF="/etc/wpa_supplicant/wpa_supplicant.conf" # this funcion is called once the connection is established, # in this case a boot sound will be played to notify the user that everything is ready. function connected { aplay /root/Windows3.1.wav 2>&1 >/dev/null & } # function that tries to establish a connection, get a network in $temp from the WPA file # and then goes through all available networks ($essid) to find a match. function testConnect { while [ $x -lt ${#essid[@]} ]; do if [ "${temp[ssid]}" = "${essid[$x]}" ] then echo "Trying to connect to ${temp[ssid]}" ssid="${temp[ssid]}" ssid="${ssid%\"}" ssid="${ssid#\"}" iwconfig wlan0 essid "$ssid" dhclient wlan0 connected exit fi (( x++ )) done } a=0 b=0 x=0 declare -a essid declare -a address # load in $essid and $address all available networks while read line do case $line in *ESSID* ) line=${line#*ESSID:} essid[$a]="$line" a=$((a + 1)) ;; *Address*) line=${line#*Address:} address[$b]="$line" b=$((b + 1)) ;; esac done < <(iwlist wlan0 scanning) #load in $temp a network at time from the WPA supplicant file declare -A temp i=0 flag=0 while read line do case "$line" in "network={") flag=1 ;; "}") #echo "${temp[*]}" testConnect temp[@] ((i++)) flag=0 ;; *) if [ "$flag" -eq 1 ]; then IFS='=' read -a array <<< "$line" key="${array[0]}" temp[$key]="${array[1]}" fi esac done < $WPA_SUPPLICANT_CONF # if a connection hasn't been established create an hotspot if ifconfig wlan0 | grep -q "inet addr:" ; then echo "Already Connected" # start the watchdog service service wifi_watchdog start connected else #we don't know if the watchdog service is running so stop it 'cause I haven't test it yet service wifi_watchdog stop echo "Network connection down! Inizializing hotspot:" # set a static IP ifconfig wlan0 192.168.0.1 netmask 255.255.255.0 # inizialize hotspot hostapd -B -dd /etc/hostapd/hostapd.conf # start dhcp service udhcpd start connected fi