shared

对于无线网卡采用prism芯片的linux的开源驱动.

		i=`expr $i + 1`
	done

	if [ -z "$bssfound" ]; then	# No BSSs found, bail.
		return 1
	else
		# Now find the closest
		bigsignal=0
		for i in $bssfound ; do
			result=`$WLANCTL $1 dot11req_scan_results bssindex=$i`
			eval $result
			if [ $bigsignal -lt $signal ]; then
				bigsignal=$signal
				bigbssindex=$i
			fi
		done
		result=`$WLANCTL $1 dot11req_scan_results bssindex=$bigbssindex`
		eval $result
		return 0
	fi
}

wlan_wep ()
{
	# $1 == wlandev

	#=======WEP===========================================
	# Setup privacy
	if [ ${dot11PrivacyInvoked:-"false"} = "false" ] ; then
		return 0;
	fi

	result=`$WLANCTL $1 dot11req_mibget mibattribute=dot11PrivacyOptionImplemented`
	if [ $? = 0 ] ; then
		eval $result
		eval $mibattribute
	else
		${ECHO} "dot11PrivacyOptionImplemented mibget failed."
		return 1
	fi

	if [ $dot11PrivacyOptionImplemented = "false" ] ; then
		${ECHO} "Cannot enable privacy, dot11PrivacyOptionImplemented=false."
		return 1
	fi

	# Do we want host-based WEP?
	result=`$WLANCTL $1 lnxreq_hostwep \
	    decrypt="${lnxreq_hostWEPDecrypt:-false}"    \
	    encrypt="${lnxreq_hostWEPEncrypt:-false}"`

	# set up the rest of the parametsrs.
	if [ $dot11PrivacyOptionImplemented = "true" -a \
	     $dot11PrivacyInvoked = "true" ] ; then
		result=`$WLANCTL $1 dot11req_mibset \
			  mibattribute=dot11WEPDefaultKeyID=$dot11WEPDefaultKeyID `
		result=`$WLANCTL $1 dot11req_mibset \
			mibattribute=dot11ExcludeUnencrypted=$dot11ExcludeUnencrypted `
		result=`$WLANCTL $1 dot11req_mibset \
			mibattribute=dot11PrivacyInvoked=$dot11PrivacyInvoked`
		if [ "${PRIV_GENSTR:-empty}" != "empty" ] ; then
			if [ ${PRIV_KEY128:-"false"} = "false" ]; then
				keys=`$PRIV_GENERATOR "$PRIV_GENSTR" 5`
			else
				keys=`$PRIV_GENERATOR "$PRIV_GENSTR" 13`
			fi
				knum=0
			for i in $keys ; do
				result=`$WLANCTL $1 dot11req_mibset \
				mibattribute=dot11WEPDefaultKey$knum=$i`
				knum=`expr $knum + 1`
			done
		else 
			result=`$WLANCTL $1 dot11req_mibset \
			mibattribute=dot11WEPDefaultKey0=$dot11WEPDefaultKey0 `
			result=`$WLANCTL $1 dot11req_mibset \
			mibattribute=dot11WEPDefaultKey1=$dot11WEPDefaultKey1 `
			result=`$WLANCTL $1 dot11req_mibset \
			mibattribute=dot11WEPDefaultKey2=$dot11WEPDefaultKey2 `
			result=`$WLANCTL $1 dot11req_mibset \
			mibattribute=dot11WEPDefaultKey3=$dot11WEPDefaultKey3 `
		fi
	else
		# disable wep explicitly.
		result=`$WLANCTL $1 dot11req_mibset \
			mibattribute=dot11PrivacyInvoked=$dot11PrivacyInvoked `
		result=`$WLANCTL $1 dot11req_mibset \
			mibattribute=dot11ExcludeUnencrypted=false `
	fi
}

wlan_adhoc ()
{
	# $1 == wlandev

	#=======IBSS STARTUP==================================
	startcmd="$WLANCTL $1 dot11req_start "
	startcmd="$startcmd ssid=$DesiredSSID"
	startcmd="$startcmd bsstype=independent"
	startcmd="$startcmd beaconperiod=$BCNINT" 
	startcmd="$startcmd dtimperiod=3"
	startcmd="$startcmd cfpollable=false"
	startcmd="$startcmd cfpollreq=false"
	startcmd="$startcmd cfpperiod=3"
	startcmd="$startcmd cfpmaxduration=100"
	startcmd="$startcmd probedelay=100"
	startcmd="$startcmd dschannel=$CHANNEL"
	j=1
	for i in $BASICRATES ; do
		startcmd="$startcmd basicrate$j=$i"
		j=`expr $j + 1`
		done

	j=1
	for i in $OPRATES ; do
		startcmd="$startcmd operationalrate$j=$i"
		j=`expr $j + 1`
	done

	results=`$startcmd`	# Here's where it runs
	if [ $? = 0 ]; then 
		eval $results
		if [ $resultcode != "success" ] ; then 
			${ECHO} "IBSS not started, resultcode=$resultcode"
			exit 1
		else
			${ECHO} "IBSS mode started."
		fi
	else
		${ECHO} FAILED: $startcmd
		return 1
	fi
	WLAN_SCHEMESSID="$DesiredSSID"
}

wlan_infra ()
{
	# $1 == wlandev

	#==== INFRASTRUCURE STARTUP===========================
	# XXX TODO:  Grok DesiredBSSID

	sleep 5
	results=`$WLANCTL $1 lnxreq_autojoin \
		"ssid=$DesiredSSID" \
		authtype=${AuthType:="opensystem"} | sed 's/\([^=]*\)=\(.*\)/\1="\2"/'`
	eval $results
	if [ ${resultcode:-"failure"} != "success" ] ; then
		${ECHO} 'error: Autojoin indicated failure!'
		return 1;
	fi

	WLAN_SCHEMESSID="$DesiredSSID"
}

wlan_dot11_join ()
{
	# $1 == wlandev

	joincmd="$WLANCTL $1 dot11req_join bssid=$DesiredBSSID"
	joincmd="$joincmd joinfailuretimeout=1"
	
	j=1
	for i in $OPRATES ; do
		joincmd="$joincmd operationalrate$j=$i"
		j=`expr $j + 1`
	done

	results=`$joincmd`

	eval $results
	if [ ${resultcode:-"failure"} != "success" ] ; then
		${ECHO} "$1: JOIN Failure"
		${ECHO} "joincmd=$joincmd"
		${ECHO} "results=$results"
		return 1;
	fi
}

wlan_dot11_auth_assoc ()
{
    # $1 == wlandev
	if [ $bsstype = "infrastructure" ] ; then 
		results=`$WLANCTL $1 dot11req_authenticate \
				peerstaaddress=$DesiredBSSID \
				authenticationtype=$AuthType \
				authenticationfailuretimeout=2000`
		eval $results
		if [ ${resultcode:-"failure"} != "success" ] ; then
			${ECHO} "error:  dot11req_authenticate failed, "\
				"resultcode=$resultcode"
			return 1;
		fi
		results=`$WLANCTL $1 dot11req_associate \
				listeninterval=1000 \
				associatefailuretimeout=2000 `
		if [ ${resultcode:-"failure"} != "success" ] ; then
			${ECHO} 'error:  dot11req_associate failed!'
			return 1;
		fi
	fi
}

wlan_set_ssid_schemefile ()
{
	# $1 == SSID

	# Find the scheme file 
	if [ -r /var/lib/misc/pcmcia-scheme ] ; then
		# Debian
		WLAN_SCHEMEFILE="/var/lib/misc/pcmcia-scheme"
	elif [ -d /var/state/pcmcia ] ; then
		WLAN_SCHEMEFILE="/var/state/pcmcia/scheme"
	elif [ -d /var/lib/pcmcia ] ; then
        	WLAN_SCHEMEFILE="/var/lib/pcmcia/scheme"
	else
		WLAN_SCHEMEFILE="/var/run/pcmcia-scheme"
	fi

	# Collect the current scheme name and save the file
	if [ -r $WLAN_SCHEMEFILE ] ; then
		WLAN_SCHEME=`cat $WLAN_SCHEMEFILE`
		cp $WLAN_SCHEMEFILE /var/run/wlan_scheme_`date +"%T"`.tmp
	else
		touch /var/run/wlan_scheme_`date +"%T"`.tmp
		
	fi

	# Set up the <scheme:SSID> string
	if [ ! "$WLAN_SCHEME" ] ; then 
		WLAN_SCHEME="default"
	fi
	WLAN_SCHEME="$WLAN_SCHEME:$1"

	# Write to schemefile
	echo $WLAN_SCHEME > $WLAN_SCHEMEFILE
}

wlan_restore_schemefile ()
{
	# Find the scheme file 
	if [ -r /var/lib/misc/pcmcia-scheme ] ; then
		# Debian
		WLAN_SCHEMEFILE="/var/lib/misc/pcmcia-scheme"
	elif [ -d /var/state/pcmcia ] ; then
		WLAN_SCHEMEFILE="/var/state/pcmcia/scheme"
	elif [ -d /var/lib/pcmcia ] ; then
        	WLAN_SCHEMEFILE="/var/lib/pcmcia/scheme"
	else
		WLAN_SCHEMEFILE="/var/run/pcmcia-scheme"
	fi

	TMPFILE=`ls /var/run/wlan_scheme*.tmp | tail -n 1`

	if [ -r $TMPFILE ] ; then
		cat $TMPFILE > $WLAN_SCHEMEFILE
		rm -f $TMPFILE
	else
		${ECHO} "wlan_restore_schemefile: No wlan_scheme\*.tmp file found."
	fi
}

wlan_bring_it_up ()
{
    # $1 == wlandev
    # $2 == non-null if wext enabled.

    #=======ENABLE========================================
    # Do we want to init the card at all?
    eval 'WLAN_ENABLE=$ENABLE_'$1

    if ! is_true $WLAN_ENABLE ; then
	return 1
    fi
    
    if wlan_enable $1 ; then
	if [ -z "$2" ] ; then
	    wlan_scan_and_join $1
	    return $?
	else
	    ${ECHO} "Bypassing configuration due to wireless extensions"
	fi	
    else
	return 1;
    fi

    return 1
}

wlan_scan_and_join ()
{
    #=======MAC STARTUP=========================================
    wlan_supports_scan $1
    if [ $? = 0 ] ; then
	wlan_scan $1 
	if [ $? = 0 ] ; then
	    wlan_source_config_for_ssid "$ssid" "$bssid"
	    
	    wlan_user_mibs $1
	    wlan_wep $1
	    
	    wlan_join $1
	else
	    if is_true $IS_ADHOC ; then     
		# start an IBSS; we didn't find one.
		wlan_adhoc $1
	    else
		return 1
	    fi
	fi
    else
	wlan_source_config $1
	
	wlan_user_mibs $1
	wlan_wep $1
	
	if is_true $IS_ADHOC ; then     
	    wlan_adhoc $1
	else
	    wlan_infra $1
	fi
    fi
    
    return $?
}

wlan_join ()
{
    # $1 == wlandev
    grep 'autojoin' /proc/net/p80211/$1/wlandev > /dev/null
    if [ $? = 0 ]; then
	wlan_infra $1
    else
	wlan_dot11_join $1
	wlan_dot11_auth_assoc $1
    fi
}

tmpname ()
{
	# $1 == prefix
	local i=0
	local tname=$TMPDIR/${1}_$$
	if [ -f ${tname}.tmp ] ; then
		for i in 0 1 2 3 4 5 6 7 8 9 ; do
			if [ ! -f ${tname}_${i}.tmp ] ; then
				echo ${tname}_${i}.tmp 
				return 0
			fi
		done
	else
		echo ${tname}.tmp
	fi
	return 0
}

source_procfile ()
{
	# $1 == procfile to source
	local fname=`tmpname wlan_procfile`
	cat "$1" > $fname
	. $fname
	rm -f $fname
}

# This is set by the Configure script as part of 'make install'
#FIRMWARE_DIR="/usr/share/linux-wlan"