#!/bin/sh
#########################################################################################
## ##
## AutoAP, by JohnnyPrimus, additional development by Mathilda and MarcJohnson ##
## http://sourceforge.net/projects/autoap ##
## ##
## autoap is a small addition for the already robust DD-WRT firmware that enables ##
## users to migrate through/over many different wireless hotspots with low impact ##
## to the users internet connectivity. This is especially useful in broad, city ##
## scale areas with dense AP population. ##
## ##
## Terms and Conditions: ##
## ##
## AutoAP is released under the GNU Public License, and is subject to all conditions ##
## of the latest version. The full version of the license can be viewed within the ##
## filed named LICENSE, or by visiting http://www.gnu.org/licenses/gpl.txt ##
## ##
#########################################################################################
authstring="AutoAP, by JohnnyPrimus - lee@partners.biz - 2007-02-01" ##
authstring2="Additional development by Mathilda and MarcJohnson" ##
# History:
#
# 2007-01-29
# - In an effort to both maintain compatibility with
# - the upcoming web interface (autoap.cgi and Wireless_AutoAP.asp)
# - I have reverted the functions to a previous revision. This rev
# - should be considered a stable branch of old code, as the functionality
# - here has never been publicly released.
# - The secondary motive is to fix the problems with WEP, curr_ssid, and
# - joinpref that have become prevalent in the past few releases.
# - The detailed changelog is too long to fully list here, a code diff is available
# - via the SVN interface at sourceforge.
#
# 2007-01-30
# - Script updated to fix logger problem present in builds from recent
# - svn checkouts of DD-WRT. Also added two fixes from a version prior
# - to the latest reversion (findopen and findwep were misnamed, prepended
# - with aap_ )
#
# 2007-02-01
# - use 'wl ssid' instead of 'wl assoc', works also when connected automatically
# - put ssid in quotes, to handle spaces in SSIDs
# - make date of the script appear on top of the log
# - wait aap_dhcpw after dhcp renewal in aap_checkjoin()
aaptmpdir="/tmp/autoap"
aapwmpdir="/tmp/autoap/wep"
rm -f $aaptmpdir/*
mkdir -p $aaptmpdir
rm -f /tmp/aap.result
###### Search modes - WEP and Open. Default is Open enabled and WEP disabled.
## nvram set autoap_findopen="1"
## nvram set autoap_findwep="1"
##
## Note: If WEP is enabled you need to provide keys to connect with.
## AutoAP will try each key until one works. If none work, it skips
## that network.
##
aap_findopen="1"
aap_findwep="0"
[ -n "$(nvram get autoap_findopen)" ] && aap_findopen="$(nvram get autoap_findopen)";
[ -n "$(nvram get autoap_findwep)" ] && aap_findwep="$(nvram get autoap_findwep)";
[ "$aap_findwep" = "1" ] && mkdir -p $aaptmpdir/wep;
###### Logging. Default is log to syslog.
###### AutoAP can log to syslog, or to a file. Valid options are
## syslog, filename and html. If html is selected, the log is
## available via web browser at http://routerip/autoap/log.html
##
aap_logger="syslog"
[ -n "$(nvram get autoap_logger)" ] && aap_logger="$(nvram get autoap_logger)";
###### WEP Keys
###### Space seperated list of wep keys to try
## Currenly only supports 10 digit hex keys. Others may work, untested.
## nvram set autoap_wepkeys="00134A3BF2 5B8CE1B462 AAA1234567"
##
aap_wepkeys=""
if [ -n "$(nvram get autoap_wep1)" ]; then
aap_wepkeys="$(nvram get autoap_wep1)";
[ -n "$(nvram get autoap_wep2)" ] && aap_wepkeys="${aap_wepkeys} $(nvram get autoap_wep2)";
[ -n "$(nvram get autoap_wep3)" ] && aap_wepkeys="${aap_wepkeys} $(nvram get autoap_wep3)";
fi
###### Max APs to track at once. Default 5
## nvram set autoap_aplimit="5"
##
aap_aplimit="10"
[ -n "$(nvram get autoap_aplimit)" ] && aap_aplimit="$(nvram get autoap_aplimit)";
###### Internet check toggle. Set to 1 to enable, 0 to disable. Default enabled.
## nvram set autoap_inet="1"
##
aap_watch_inet="1";
[ -n "$(nvram get autoap_inet)" ] && aap_watch_inet="$(nvram get autoap_inet)";
###### Internet check URL. The URL or IP to ping to ensure internet access.
## nvram set autoap_ineturl="www.partners.biz"
##
aap_chk_url="www.google.com";
[ -n "$(nvram get autoap_ineturl)" ] && aap_chk_url="$(nvram get autoap_ineturl)";
###### Length of time to wait for a DHCP request to succeed. Default 15
## nvram set autoap_dhcpw="15"
##
aap_dhcpw="15"
[ -n "$(nvram get autoap_dhcpw)" ] && aap_dhcpw="$(nvram get autoap_dhcpw)";
###### Scan Frequency. Default 60 Seconds
## The delay in seconds to wait between scanning
## for new or improved signals. This frequency
## is only used when a signal has already been established.
## When no connection is active, it is not used.
aap_scanfreq="60"
[ -n "$(nvram get autoap_scanfreq)" ] && aap_scanfreq="$(nvram get autoap_scanfreq)";
############### MAC/BSSID Ignore List ###################################
## You can permanently store this setting in nvram, as a space #
## seperated list of MAC address you don't wish to connect with. #
## nvram set autoap_macfilter="00:11:22:33:44:55 AA:BB:CC:DD:EE:FF etc" #
## -see SSID ignore below. #
#########################################################################
if [ -n "$(nvram get autoap_mac1)" ]; then
aap_ignmacs="$(nvram get autoap_mac1)";
[ "$(nvram get autoap_mac2)" ] && aap_ignmacs="${aap_ignmacs} $(nvram get autoap_mac2)"
[ "$(nvram get autoap_mac3)" ] && aap_ignmacs="${aap_ignmacs} $(nvram get autoap_mac3)"
fi
############### SSID Ignore List ##########################################
## Like the MAC filter, this is a space seperated list stored in nvram, #
## and will prevent autoap from connecting to any SSID you designate. #
## nvram set autoap_ssidfilter="AA:BB:CC:DD:EE:FF 00:11:22:33:44:55 etc" #
## #
###########################################################################
if [ -n "$(nvram get autoap_ssid1)" ]; then
aap_ignssid="$(nvram get autoap_ssid1)";
[ "$(nvram get autoap_ssid2)" ] && aap_ignssid="${aap_ignssid} $(nvram get autoap_ssid2)"
[ "$(nvram get autoap_ssid3)" ] && aap_ignssid="${aap_ignssid} $(nvram get autoap_ssid3)"
fi
############### SSID Prefer List ##########################################
## Like the MAC filter, this is a space seperated list stored in nvram, #
## and will prevent autoap from connecting to any SSID you designate. #
## nvram set autoap_ssidfilter="AA:BB:CC:DD:EE:FF 00:11:22:33:44:55 etc" #
## #
###########################################################################
if [ -n "$(nvram get autoap_pref_1)" ]; then
aap_prefssid=""
else
aap_prefssid="$(nvram get autoap_pref_1)"
if [ "$(nvram get autoap_pref_2)" ]; then
aap_prefssid=$(aap_prefssid)"$(nvram get autoap_pref_2)"
fi
fi
###### Maximum number of lines of the logfile. Default 1000
## nvram set autoap_logsize="1000"
##
aap_logsize="1000"
[ -n "$(nvram get autoap_logsize)" ] && aap_logsize="$(nvram get autoap_logsize)";
########## Misc. Utilities #############
## A number of utility functions needed
## by scanman, amongst others.
## Clear all query and scanner vars simultaneously and reset scan status.
case "$aap_logger" in
'syslog')
lc1="logger -p local7."
lc2=" -t autoap "
errredir="/dev/null"
;;
'html')
lc1="logger -s -p"
lc2=" -t autoap "
errredir="/tmp/autoap.log"
touch $errredir
log_parse="0"
ln -s $errredir /tmp/www/autoap.htm
echo "<html><head><title>AutoAP Log Data</title></head><body><h2>AutoAP Log Begin:</h2>" > $errredir 2>/dev/null
;;
*)
lc1="logger -s -p local7."
lc2=" -t autoap "
errredir="$aap_logger"
log_parse="0"
touch $errredir
echo "<pre>" > $aap_logger 2>/dev/null
;;
esac
aaplog ()
{
[ $# -gt 0 ] && p1="$1 " && shift;
ts=` /bin/date "+%Y-%m-%d %H:%M:%S "`
lcmd="${lc1}$p1${lc2}${ts}\"$* \"";
[ "$aap_logger" = "html" ] && lcmd="${lc1}$p1${lc2}${ts}\"$* \"<br />";
runc=$($lcmd) 2>>$errredir
}
aap_logcurrsig ()
{
wl rssi $(wl bssid); wl noise && sleep 2;
cPRE=$(echo `wl rssi $(wl bssid);wl noise`)
cSIG=`echo $cPRE|awk {'print \$1-\$2'}`
aaplog 3 logsig - Current signal is ${cSIG}dB
}
wlVarDie ()
{
aaplog 7 wlVarDie - Unsetting variables.
unset cSSID cRSSI cNOISE cCHAN cSNR cBSSID cMODES
newwep=0
wl wep 0 2>/dev/null
}
wlReset ()
{
aaplog 7 wlReset - Completely resetting scanner.
wlVarDie
firstRun=1
inet_two=0
rm -f /tmp/aap.result 2>/dev/null
rm -f $aaptmpdir/* 2>/dev/null
}
aaping ()
{
pcmd=`ping -c 5 $1 | grep from | wc -l | awk '{ print \$1 }'`
if [ ! $pcmd -gt 1 ]; then
aaplog 3 aaping - Failed to ping $1.
echo "0"
else
aaplog 3 aaping - Recieved ping reply from $1.
echo "1"
fi
}
################### Start AutoAP ###########################
## Scanners, parsers, etc
##
firstRun=1
inet_two=0
current_ap=1
wl_mode=`wl ap | awk '{ print \$3 }'`
wl_if=`nvram get wl0_ifname`
keynum=1
tPref=""
if [ "$aap_findwep" = "1" ]; then
if [ "$aap_wepkeys" = "" ]; then
aaplog 4 WEP keys not provided. Switching to open only mode.
aap_findwep=0
aap_findopen=1
else
wl addwep 1 0000000000
wl primary_key 1
fi
fi
aaplog 6 $authstring
aaplog 6 $authstring2
if [ "$wl_mode" = "1" ]; then
aaplog 3 FATAL - Router is in AP mode. Exiting.
exit 0
fi
## Initialize scans
aap_init_scan ()
{
wl scan > /dev/null 2>&1 && wl scanresults > /tmp/aap.result
[ "$inet_two" = "1" ] && aap_inet_chk;
if [ "$ap_good" = "1" ]; then
ap_good=0
log_parse=$(( $log_parse + 1 ))
aaplog 6 init_scan - Sleeping for ${aap_scanfreq}.
if [ "$log_parse" = "2" ] && [ ! "$errredir" = "" ]; then
echo `tail -1000 $errredir` > $errredir
log_parse=0
fi
sleep $aap_scanfreq
if [ "$aap_watch_inet" = "1" ]; then
aaplog 6 init_scan - Woke up. Verifying internet connection.
aap_inet_chk
else
aaplog 6 init_scan - Woke up. Verifying router connection.
aap_chk_join $tPref
fi
else
if [ "$firstRun" = "1" ] || [ ! -n $(nvram get wan_gateway) ]; then
if [ $(cat /tmp/aap.result | wc -l) -gt 2 ]; then
sleep 1
current_ap=1
aaplog 5 init_scan - Retrieved new scan data.
firstRun=0
aap_scanman
else
aaplog 5 init_scan - Scan failed. Retrying initial scan.
sleep 3
fi
else
cur_wip=$(ifconfig `nvram get wl0_ifname`|awk 'NR==2{print \$2}'|sed s!addr:!!)
sleep 1
if [ "$cur_wip" = "0.0.0.0" ]; then
aaplog 4 init_scan - WAN IP address invalid.
if [ "$(nvram get wan_proto)" = "static" ]; then
aaplog 4 init_scan - Router is not in DHCP mode. Setting DHCP mode.
nvram set wan_proto="dhcp"
nvram commit
kill -SIGTERM `cat /tmp/var/run/udhcpc.pid`
rm -f /tmp/*.expires
ln -sf /sbin/rc /tmp/udhcpc
sleep 1
udhcpc -i eth1 -p /var/run/udhcpc.pid -s /tmp/udhcpc -H $(nvram get wan_hostname) > /dev/null 2>&1
sleep 1
[ -s /tmp/var/run/udhcpc.pid ] || aaplog 2 init_scan - Could not start dhcp client. Reinitializing. && aap_init_scan;
aaplog 4 init_scan - DHCP client successfully started for WAN device.
fi
killall -SIGUSR1 udhcpc > /dev/null 2>&1
aaplog 6 init_scan - Waiting $aap_dhcpw for DHCP response.
sleep $aap_dhcpw
[ "$cur_wip" = "0.0.0.0" ] && aaplog 4 init_scan - DHCP lease failed. Seeking new AP. && wlVarDie && aap_scanman;
aaplog 5 init_scan - DHCP lease renewed successfully.
fi
if [ "$aap_watch_inet" = "1" ]; then
aaplog 5 init_scan - Currently connected to $(nvram get wan_gateway). Checking for internet access.
aap_inet_chk
else
aaplog 5 init_scan - Connected to $(nvram get wan_gateway). No internet check requested, sleeping $aap_scanfreq seconds.
sleep $aap_scanfreq
aaplog 7 init_scan - Awake. Checking connection via init_scan.
fi
fi
fi
}
## Scanman performs all of the parsing and filter
## logic, if the filter lists are configured.
aap_scanman ()
{
while read scanLine; do
lineID=$(expr substr "$scanLine" 1 4)
case "$lineID" in
'SSID')
cSSID=$(echo "$scanLine" | tr -d '"' | sed s!SSID:.!!)
if [ -n "$aap_ignssid" ]; then
for i in $aap_ignssid; do
if [ "$cSSID" = "$i" ]; then
aaplog 4 ssid_filter - Ignoring remote SSID $cSSID per user request.
wlVarDie
fi; done; fi
;;
'Mode')
cRSSI=`echo $scanLine | awk '{ print \$4 }'`
cNOISE=`echo $scanLine | awk '{ print \$7 }'`
cCHAN=`echo $scanLine | awk '{ print \$10 }'`
cSNR=$(( $cRSSI - $cNOISE ))
;;
'BSSI')
cBSSID=`echo $scanLine | awk '{ print \$2 }'`
if [ -n "$aap_ignmacs" ]; then
for j in $aap_ignmacs; do
if [ "$cBSSID" = "$j" ]; then
aaplog 4 bssid_filter - Ignoring remote BSSID $cBSSID per user request.
wlVarDie
fi; done; fi
cMODES=$(echo "$scanLine" | sed s!BSSID.*bility..!!)
for k in $cMODES; do
if [ "$k" = "WEP" ] || [ "$k" = "WPA" ]; then
if [ "$k" = "WEP" ] && [ "$aap_findwep" = "1" ]; then
newwep=1
[ "$aap_findopen" = "0" ] && aaplog 5 scanman - Currently in WEP only mode. Skipping open network $cSSID.
else
aaplog 5 scanman - Skipping \($cMODES\) protected network $cSSID.
wlVarDie
fi; fi; done
;;
*)
if [ -n "$scanLine" ] && [ $cSNR -gt 3 ]; then
[ $cSNR -lt 10 ] && cSNR="0${cSNR}";
if [ "$aap_findwep" = "1" ] && [ "$newwep" = "1" ]; then
echo "$cSNR $cSSID $cBSSID $cCHAN" | sed s!^\(.-\)!0\1! > $aaptmpdir/wep/$cSNR-$cSSID
aaplog 2 scanman - Found WEP network ${cSSID}. \(BSSID\: ${cBSSID}, Signal\: ${cSNR}dB\)
aaplog Trying WEP keys.
elif [ "$aap_findopen" = "1" ]; then
echo "$cSNR $cSSID $cBSSID $cCHAN" | sed s!^\(.-\)!0\1! > $aaptmpdir/$cSNR-$cSSID
aaplog 2 scanman - Found open network $cSSID. \(BSSID\: ${cBSSID}, Signal\: ${cSNR}dB\)
else
wlVarDie
aaplog 7 scanman - No interesting networks found this pass.
fi;
fi
;;
esac
done < /tmp/aap.result
ap_dir_limit="$(ls -1 $aaptmpdir | grep -v autoap.log | wc -l)"
aap_joinpref
}
## joinpref handles associating with an AP,
## verifying the connection is decent, and cleaning
## up the connection when a new AP is found.
aap_joinpref ()
{
if [ $current_ap -le $aap_aplimit ]; then
aaplog 4 joinpref - Moving to network $current_ap.
tPref=$(ls -1 $aaptmpdir | grep -v log | sort -r | head -n${current_ap} | tail -n1 | sed s!^..-!!)
if [ "$aap_prefssid" ]; then
for n in $aap_prefssid; do
if [ "$n" = "$cSSID" ]; then
aaplog 4 ssid_filter - Joining $cSSID per used request.
tPref="$n"
fi; done; fi
current_ap=$(($current_ap + 1))
aaplog 4 joinpref - Trying to join SSID ${tPref}.
nvram set wl0_ssid=""
nvram set wl_ssid=""
nvram set wan_ipaddr="0.0.0.0"
nvram set wan_netmask="0.0.0.0"
nvram set wan_gateway="0.0.0.0"
nvram set wan_get_dns=""
nvram set wan_lease="0"
rm /tmp/get_lease_time
rm /tmp/lease_time
if [ "$newwep" = "1" ]; then
wlkey=`echo $aap_wepkeys | awk '{ print \$$keynum }'`
if [ ! "$wlkey" = "" ]; then
wl rmwep 1
wl addwep 1 $wlkey
keynum=$(($keynum + 1))
wl wep 1 2>/dev/null
aaplog 4 joinpref - Trying to join ${tPref}. Using WEP key $wlkey
sleep 1
else
keynum=0
newwep=0
aaplog 4 joinpref - No WEP keys left to try.
fi
else
wl wep 0 2>/dev/null
fi
if [ "$keynum" = "0" ]; then
keynum=1
aaplog 4 joinpref - Unable authenticate to ${tPref}. Moving on.
else
wl join $tPref > /dev/null 2>&1
sleep 2
aaplog 5 joinpref - Associated to ${tPref}, renewing DHCP lease.
killall -SIGUSR1 udhcpc > /dev/null 2>&1
sleep $aap_dhcpw
aap_checkjoin $tPref
fi
else
aaplog 4 joinpref - No available/responding APs. Sleeping.
sleep $aap_scanfreq
aaplog 4 joinpref - Restarting scan.
wlReset
current_ap=1
fi
}
## checkjoin contains logic to verify an AP is connected, but also
## providing a usable connection. checkjoin will make two attempts
## to find a stable connection before courting a new AP.
aap_checkjoin ()
{
req_ssid="$1"
cur_ssid=$(wl ssid|sed s/^.*:.\"//|sed s/\"$//)
wlip=$(nvram get wan_gateway)
if [ ! "$req_ssid" = "$cur_ssid" ] || [ "$wlip" = "0.0.0.0" ] ; then
if [ "$2" = "1" ]; then
aaplog 4 checkjoin - $req_ssid is not responding, trying a different AP.
wlVarDie
aap_joinpref
elif [ "$wlip" = "0.0.0.0" ]; then
aaplog 3 checkjoin - $req_ssid has a WAN address of 0.0.0.0, last attempt at dhcp renewal.
killall -SIGUSR1 udhcpc > /dev/null 2>&1
sleep $aap_dhcpw
wlip=$(nvram get wan_gateway)
if [ "$wlip" = "0.0.0.0" ]; then
aaplog 4 checkjoin - $req_ssid invalid. Proceeding.
wlVarDie
aap_joinpref
else
aaplog 4 checkjoin - DHCP renewal appears to have worked. Passing control to inet_check.
aap_inet_check
fi
else
aaplog 3 checkjoin - Currently connected to ${cur_ssid}, attempting to join ${req_ssid}.
aaplog 7 checkjoin - Retrying join.
wl join "$req_ssid" > /dev/null 2>&1
sleep 2
aap_checkjoin "$req_ssid" 1
fi
else
aaplog 5 checkjoin - Successfully associated with $req_ssid. Attempting to ping gateway.
if [ ! "wlip" = "0.0.0.0" ]; then
gtping=$(aaping `nvram get wan_gateway`)
if [ "$gtping" = "0" ]; then
aaplog 3 checkjoin - Attempts to ping ${req_ssid} unsuccessful. Retrying in 1 second.
gtping=$(aaping `nvram get wan_gateway`)
[ "$gtping" = "1" ] && aaplog 3 checkjoin - Ping successful. && aap_inet_chk;
aaplog 3 checkjoin - Failed to contact gateway. Moving to another AP.
wlVarDie
aap_joinpref
else
aaplog 4 checkjoin - Successfully configured for gateway.
aap_logcurrsig
aap_inet_chk
fi
else
aaplog 3 checkjoin - WAN IP is still invalid.
if [ "$2" = "1" ]; then
aaplog 4 checkjoin - $req_ssid invalid. Proceeding.
wlVarDie
aap_joinpref
fi
fi
fi
}
## aap_inet_chk checks for internet connectivity
## and returns true or restarts scanning
aap_inet_chk ()
{
if [ "$aap_watch_inet" = "1" ]; then
icret=$(aaping $aap_chk_url)
if [ "$icret" = "0" ]; then
aaplog 5 inet_check - Failed first internet check, retry in 3 seconds. \($aap_chk_url\)
sleep 3
icret=$(aaping $aap_chk_url)
if [ "$icret" = "0" ]; then
aaplog 2 inet_check Failed second internet check. Seeking new AP.
wlVarDie
if [ $current_ap -ge $aap_aplimit ]; then
aaplog 4 inet_check - Exceeded max AP limit. Refreshing AP selections.
wlReset
fi
aap_joinpref
fi
else
aaplog 4 inet_check - Contacted ${aap_chk_url}, connection valid.
aap_logcurrsig
ap_good=1
fi
else
aaplog 4 inet_check - Skipping internet check per user request.
ap_good=1
fi
}
until [ 2 = 1 ]; do
aap_init_scan
done
