Re: wlan autoconnection skripts

Hello,

You can use wpa_supplicant to do this for you!

Take a look in "man wpa_supplicant.conf"

You can configure some "hosts" and put some priority in each host.
wpa_supplicant can roaming through networks and do too much more.

Regards,

Wesley Gentine

On Fri, 2005-08-26 at 18:12 +0200, [LoN]Kamikaze wrote:
> I made a little script to autmatically connect to known wireless
> networks. I'd like to have some people help me with testing. I'm running
> it on FreeBSD 5.4 with the ipw driver.
> 
> If it works satisfactory for everyone I'd like to write a manpage and
> maybe turn it into a port.
> 
> INSTALLATION
> Put the attached files somewhere and cd into that folder. Don't forget
> to become root.
> # cp wi.sh /usr/local/etc/rc.d/
> # cp wi /usr/local/sbin/
> # mkdir /etc/wi.conf
> # chmod 0700 /etc/wi.conf
> 
> BASIC CONFIGURATION
> You require the following entries in your /etc/rc.conf file to use the
> script.
> wi_enable="YES"
> wi_device="devicename"
> 
> Further there are 2 optional entries:
> wi_module="kernelMod"
> wi_loadfirmware="command"
> 
> wi_enable enables the script. wi_device is the name of the wireless
> network device as seen by ifconfig. wi_module is optional and the name
> of the kernel module for the wireless device. wi_loadfirmware is for
> wireless devices that need to load a firmware after the kernel module
> has been loaded. As an example here is an excerpt from my rc.conf.
> 
> wi_enable="YES"
> wi_device="ipw0"
> wi_module="if_ipw"
> wi_loadfirmware="/usr/sbin/ipwcontrol -i ipw0 -f
> /usr/local/libdata/if_ipw/ipw2100-1.3.fw"
> 
> Now you have the commands
> /usr/local/etc/rc.d/wi.sh start
> /usr/local/etc/rc.d/wi.sh stop
> /usr/local/etc/rc.d/wi.sh status
> available. Or if you want it short
> wi start
> wi stop
> wi status
> 
> 
> The following step is optional:
> I added the command
> "/usr/local/etc/rc.d/wi.sh stop"
> at the appropriate places in the files /etc/rc.suspend and
> /etc/rc.shutdown .
> To /etc/rc.resume I added the command
> "/usr/loca/etc/rc.d/wi.sh start".
> 
> CONFIGURATION OF NETWORKS
> If you did everything described above the script will be able to look
> for networks. Unfortunately it won't connect to any... that is what the
> folder /etc/wi.conf/ is meant for.
> 
> Simply add a file with the name of the network you want to connect to.
> An example for such a file would be
> 
> MYNET
> 
> /sbin/ifconfig ipw0 ssid MYNET wepkey MYKEY weptxkey 1 wepmode on
> /sbin/dhclient ipw0
> 
> Optionally you can add the file MYNET_stop and enter commands that
> should be executed before the script tries to terminate a connection. In
> most cases this won't be necessary. The script will automatically
> terminate the dhcp client, bring the device down and unload the kernel
> module.
> 
> Thank you for your time.
> 
> Dominic Fandrey
> plain text document attachment (wi)
> #!/bin/sh
> 
> # Author:       kamikaze
> # Contact:      [email protected]
> 
> #
> # Please read the comments in /usr/local/etc/rc.d/wi.sh if you
> # require documentation.
> #
> 
> # The desired action.
> command=$1
> 
> # The error number to return.
> error=0
> 
> # The characters wireless network names may consist of.
> netname_chars="aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ0123456789"
> 
> # The path for the network init scripts.
> network_scripts="/etc/wi.conf"
> 
> # Network profile.
> network_profile="/var/run/wi"
> 
> # Scan results.
> network_scan="/var/run/networks"
> 
> # Default settings.
> wi_enable="NO"
> wi_module=""
> wi_device=""
> wi_loadfirmware=""
> 
> # Get settings from rc.conf.
> . /etc/rc.subr
> 
> name="wi"
> rcvar=`set_rcvar`
> 
> load_rc_config $name
> 
> # Check if the wi service is enabled.
> if [ "$wi_enable" = "NO" ]; then
>         echo "wi_$command:	The wi service is not enabled."
>         exit 1
> fi
> 
> # Check if a device has been defined.
> if [ "$wi_device" = "" ]; then
> 	echo "wi_$command:	No device has been configured for the wiinit service."
> 	exit 1
> fi
> 
> wi_start()
> {
> 	if [ "$wi_module" ]; then
> 		# Check if the wireless device module is loaded.
> 		/sbin/kldstat -n $wi_module 2> /dev/null > /dev/null
> 		if [ $? -eq 1 ]; then
> 			echo "wi_$command:	Load kernel module for wireless network device."
> 			/sbin/kldload $wi_module 2> /dev/null > /dev/null
> 			$wi_loadfirmware
> 		fi
> 	fi
> 
> 	# Find networks.
> 	echo "wi_$command:	Searching for wireless networks."
> 	/sbin/ifconfig $wi_device up
> 	/usr/sbin/wicontrol $wi_device -L > /dev/null
> 	networks=$(/usr/sbin/wicontrol $wi_device -l | grep netname | grep -Eo "[$netname_chars]+" | grep -v SSID | grep -v netname)
> 
> 	# Save scan results.
> 	echo "$networks" > $network_scan
> 
> 	# Practically wicontrol returns networks
> 	# in the order of their signal quality.
> 	for network in $networks; do
> 		script=$(cat "$network_scripts/$network" 2> /dev/null)
> 		if [ $? -eq 0 ]; then
> 			echo "wi_$command:	Run init script for $network."
> 			echo "$script" | /bin/sh
> 			if [ $? -eq 1 ]; then
> 				echo "wi_$command:	Init script $network failed."
> 				continue
> 			else
> 				echo "wi_$command:	Done."
> 				echo $network > $network_profile
> 				exit $error
> 			fi
> 		fi
> 	done
> 
> 	# Check weather any networks have been found.
> 	if [ "$networks" = "" ]; then
> 		echo "wi_$command:	No wireless networks have been found."
> 	fi
> 
> 	# Finding a network did not succeed.
> 	error=1
> 	eval wi_stop
> }
> 
> wi_stop()
> {
> 	# Get the current profile.
> 	network=$(cat $network_profile 2> /dev/null)
> 
> 	if [ $? -eq 0 ]; then
> 		script=$(cat $network_scripts/$network_stop 2> /dev/null)
> 		if [ $? -eq 0 ]; then
> 			echo "wi_$command:	Run deactivation script for $network."
> 			echo "$script" | /bin/sh
> 		fi
> 	fi
> 
> 	echo "wi_$command:	Terminate dhclient sessions on $wi_device."
> 	/sbin/dhclient -r $wi_device
> 
> 	# Check if the device is running and shut it down.
> 	/sbin/ifconfig $wi_device | grep UP | grep RUNNING 2> /dev/null > /dev/null
> 	if [ $? -eq 0 ]; then
> 		echo "wi_$command:	Shuting down $wi_device."
> 		/sbin/ifconfig $wi_device down
> 	fi
> 
> 	# Check if the kernel module is loaded and unload it.
> 	/sbin/kldstat -n $wi_module 2> /dev/null > /dev/null
> 	if [ $? -eq 0 ]; then
> 		echo "wi_$command:	Unloading $wi_module kernel module."
> 		/sbin/kldunload $wi_module
> 	fi
> 
> 	# Remove the profile record.
> 	/bin/rm $network_profile 2> /dev/null > /dev/null
> 
> 	# Terminate program.
> 	exit $ERROR
> }
> 
> wi_status()
> {
> 	# Check weather a wireless network is configured.
> 	network=$(cat /var/run/wi 2> /dev/null)
> 	
> 	if [ $? -eq 1 ]; then
> 		echo "wi_$command:	Not connected."
> 	else
> 		echo "wi_$command:	profile: $network"
> 		status=$(/sbin/ifconfig $wi_device | grep status)
> 		echo "wi_$command:$status"
> 	fi
> 
> 	echo "wi_$command:	Available networks:"
> 	cat $network_scan 2> /dev/null
> 
> 	exit $error
> }
> 
> # Run desired command.
> wi_$command
> 
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