2. Add crontab to run this script every 2mins
*/2 * * * * /root/custom_sleep.sh
root@ls-qvl:~# cat custom_sleep.sh #!/bin/bash ################################################################################ # # CUSTOM_SLEEP by brumi 2010-07-16 # ################################################################################ # NOTE: please run this script every 2mins by crontab # This cron-job is intended to be used as replacement for the provided standby- # mechanism from buffalo. It checks for open connections and only when there are # no open connections found for a certain period of time it will put the link- # station into standby. TIMEOUT=1800 # wait TIMEOUT seconds before going to standby CONN_FILE=/var/run/connected # file to store timestamp LOG_FILE=/var/log/custom_sleep # log-file ENABLE_LOG='yes' # enable logging [yes|no] # ip addresses to exclude from the connection-check (i.e., local ones) OWN_IPADDR=`/bin/ipaddr show eth0 | /bin/grep -o -e "inet [0-9]*\.[0-9]*\.[0-9]*\.[0-9]*" | /bin/sed s/"inet "//` EXCLUDE_IPADDR=(${OWN_IPADDR} 0.0.0.0 127.0.0.1 239.255.255.250 192.168.88.255) EXCLUDE_IPADDR_CT=5 # disable sleep in manual mode auto_pwr_stat=`cat /proc/buffalo/gpio/switch/auto_power` if [ "$auto_pwr_stat" != "on" ]; then if [ $ENABLE_LOG == 'yes' ]; then echo -n `date` >> $LOG_FILE echo ": custom_sleep: not in auto mode, exit" >> $LOG_FILE fi exit 0 fi # do nothing if already sleeping if [ -f /etc/linkstation_standby ]; then if [ $ENABLE_LOG == 'yes' ]; then echo -n `date` >> $LOG_FILE echo ": custom_sleep: already sleeping" >> $LOG_FILE fi exit 0 fi # function to check if any clients are connected connected () { CONN_IPADDR=`/bin/netstat -tna 2> /dev/null | /bin/sed s/"[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*"/"&\n"/ | /bin/grep -o -e "[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*"` for ip in $CONN_IPADDR do exclude=0 for ((i=0;i<$EXCLUDE_IPADDR_CT;i++)) do if [ ${EXCLUDE_IPADDR[$i]} == $ip ]; then exclude=1 fi done if [ $exclude -eq 0 ]; then if [ $ENABLE_LOG == 'yes' ]; then echo -n `date` >> $LOG_FILE echo ": custom_sleep: active ip $ip" >> $LOG_FILE fi return 1 fi done return 0 } # check for connections and update $CONN_FILE connected if [ $? -eq 1 ]; then if [ -f $CONN_FILE ]; then rm $CONN_FILE fi else if [ ! -f $CONN_FILE ]; then date +%s > $CONN_FILE fi fi # check when last connection was found if [ -f $CONN_FILE ]; then last_conn=`/bin/cat $CONN_FILE` comp_time=`/bin/date +%s` let "comp_time -= $TIMEOUT" if [ $last_conn -gt $comp_time ]; then /usr/local/sbin/pwrmgr -c localhost act if [ $ENABLE_LOG == 'yes' ]; then echo -n `date` >> $LOG_FILE echo ": custom_sleep: wait-after-connection prevented standby" >> $LOG_FILE fi exit 0 fi else /usr/local/sbin/pwrmgr -c localhost act if [ $ENABLE_LOG == 'yes' ]; then echo -n `date` >> $LOG_FILE echo ": custom_sleep: connections prevented standby" >> $LOG_FILE fi exit 0 fi # no one busy -> clear timestamp and STANDBY if [ $ENABLE_LOG == 'yes' ]; then echo -n `date` >> $LOG_FILE echo ": custom_sleep: going to standby" >> $LOG_FILE fi rm $CONN_FILE /usr/local/sbin/pwrmgr -u
How to WOL:
1. Python2
#!/usr/bin/env python2 import socket import time bcast_addr = '192.168.88.255' # broadcast address for you network target_mac = "4C:E6:76:E7:xx:xx" # colons are optional, case does not matter mac = target_mac.replace(':', "") mac_bytes = "".join([chr(int(mac[i:i+2], 16)) for i in range(0, len(mac), 2)]) WoL_packet = '\xff'*6 + mac_bytes * 16 s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1) while 1: s.sendto(WoL_packet, (bcast_addr, 9)) print "Sent paket!" time.sleep(180)2. ArchLinux
- pacman -S wol
3. dd-wrt router
- Administration -- WOL -- Manual WOL, with port 9
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