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
