Revision as of 09:31, 22 July 2008

script to Auto connect to Open wirelss 81102 AP's

TODO

• determine AP without encryption and sort by best signal
• using essid of best signal perform connect/udhcpc and chknet every so often

if net is down repeat

• put it all together

sandbox

iwscan perl

#!/usr/bin/perl
# Tim Osburn - tim@osburn.com
#
# install perl

$iwlist = "/sbin/iwlist eth0 scanning";

open scan, "$iwlist |";
while (<scan>) {
  if (/^\s+Cell (\S+) - Address: (\S+)/) {
    $CELL=$1;
    $ADDRESS=$2;
    # print "$1 $2";
    $INLOOP=1;
    }
  if (/^\s+ESSID:(\S+)/) {
    $ESSID=$1;
    print " $1";
    }
  if (/^\s+Frequency:\S+ \S+ \(Channel (\S+)\)/) {
    $CHAN=$1;
    print " $1";
    }
  if (/^\s+Quality=\S+\s+Signal level=(\S+).*/) {
    $SIGNAL=$1;
    print " $1";
    }
  if (/^\s+Encryption key:(\S+)/) {
    $ENCRYPTION=$1;
    print " $1\n";
    }
  }
close scan;

produces output in the form of "essid" channel signal_strength encryption_status

"ESSID_NAME1" 1 -82 on
"ESSID_NAME2" 1 -49 off

/bin/sh

(Not Finished)

 
#!/bin/sh

   #####################
###########################
#/var/wifi/hacker/kd8ikt###
# OMG i'm programming now!#
###########################
###we.trekbeyond.org#######
  #####################
        #KISS#

######wireless interface
IFACE=eth0
#
####host to do ping test
HOST=myspace.com
#
## heh ping flood the noobs 
#
#  Func.iwlist.open
########################## outputs the single highest signal open AP in quotes
Func_iwlist_open(){
iwlist $IFACE scanning \
| awk -F '[ :=]+' '/(ESS|Freq|Qual)/{ printf $3" " } /Encr { print $4 }' \
|sort -k4 -k3nr \
|grep off \
|awk '{print $1}'	}
########################## set wireless essid 
Func_ifconfig_up(){
iwconfig $IFACE essid $Func_iwlist_open }
########################## bring down interface for another try
Func_ifconfig_down(){
killall udhcpc 
ifconfig $IFACE down	}
########################## check connectivity
Func.chk.net()	{
ping -w 2 -c 1 $HOST 
if [ $=0 ];then ERROR=0; echo Online! fi done #W00T  
if [ $=1 ] ;then ERROR=1 ;echo FAILING fi #FAIL
done }

### MAIN  ##BROKEN
Func_MAIN(){
$Func.chk.net
while [ ERROR=1 ]; do
$Func.ifconfig.down
$Func.ifconfig.up $Func.iwlist.open 
udhcpc $IFACE


if [ ERROR=1 ];do $Func_MAIN ;fi
if [ ERROR=0 ];do sleep 30 ; fi 

done		}