radical simplify script, no more ttvn rating - just check if online

files/lib/gluon/ssid-changer/ssid-changer.sh

 #!/bin/sh
 
-# At first some Definitions:
-
-ONLINE_SSID=$(uci get wireless.client_radio0.ssid -q)
-: ${ONLINE_SSID:=FREIFUNK}   # if for whatever reason ONLINE_SSID is NULL
-OFFLINE_PREFIX='FF_OFFLINE_' # Use something short to leave space for the nodename
-
-UPPER_LIMIT='30' #Above this limit the online SSID will be used
-LOWER_LIMIT='20' #Below this limit the offline SSID will be used
-# In-between these two values the SSID will never be changed to preven it from toggeling every Minute.
-
-# Generate an Offline SSID with the first and last Part of the nodename to allow owner to recognise wich node is down
-NODENAME=`uname -n`
-if [ ${#NODENAME} -gt $((30 - ${#OFFLINE_PREFIX})) ] ; then #32 would be possible as well
-	HALF=$(( (28 - ${#OFFLINE_PREFIX} ) / 2 )) #calculate the length of the first part of the node identifier in the offline-ssid
-	SKIP=$(( ${#NODENAME} - $HALF )) #jump to this charakter for the last part of the name
-	OFFLINE_SSID=$OFFLINE_PREFIX${NODENAME:0:$HALF}...${NODENAME:$SKIP:${#NODENAME}} # use the first and last part of the nodename for nodes with long name
-else
-	OFFLINE_SSID="$OFFLINE_PREFIX$NODENAME" #greate we are able to use the full nodename in the offline ssid
+# maximum simplyfied, no more ttvn rating
+check=$(batctl -H|wc -l)
+name=$(nodename status|tail -c 21)
+OFFLINE_PREFIX="FF_OFFLINE_"
+default="freiburg.freifunk.net"
+offi="$offline$name"
+
+if [ $check -eq 0 ] ; then
+	if [ $(uci get wireless.client_radio0.ssid) -eq "$offi" ] ; then exit 0 ; fi
+	uci set wireless.client_radio0.ssid='$OFFLINE_PREFIX$name'
+	killall -HUP hostapd
 fi
-
-#Is there an active Gateway?
-GATEWAY_TQ=`batctl gwl | grep "^=>" | awk -F'[()]' '{print $2}'| tr -d " "` #Grep the Connection Quality of the Gateway which is currently used
-
-if [ ! $GATEWAY_TQ ]; #If there is no gateway there will be errors in the following if clauses
-then
-	GATEWAY_TQ=0 #Just an easy way to get an valid value if there is no gatway
-fi
-
-if [ $GATEWAY_TQ -gt $UPPER_LIMIT ];
-then
-	echo "Gateway TQ is $GATEWAY_TQ node is online"
-	for HOSTAPD in $(ls /var/run/hostapd-phy*); do #Check status for all physical devices
-		CURRENT_SSID=`grep "^ssid=$ONLINE_SSID" $HOSTAPD | cut -d"=" -f2`
-		if [ $CURRENT_SSID == $ONLINE_SSID ]
-		then
-			echo "SSID $CURRENT_SSID is correct, noting to do"
-			HUP_NEEDED=0
-			break
-		fi
-		CURRENT_SSID=`grep "^ssid=$OFFLINE_SSID" $HOSTAPD | cut -d"=" -f2`
-		if [ $CURRENT_SSID == $OFFLINE_SSID ]
-		then
-			logger -s -t "gluon-offline-ssid" -p 5 "TQ is $GATEWAY_TQ, SSID is $CURRENT_SSID, change to $ONLINE_SSID" #Write Info to Syslog
-			sed -i s/^ssid=$CURRENT_SSID/ssid=$ONLINE_SSID/ $HOSTAPD
-			HUP_NEEDED=1 # HUP here would be to early for dualband devices
-		else
-			echo "There is something wrong, did not find SSID $ONLINE_SSID or $OFFLINE_SSID"
-		fi
-	done
-fi
-
-if [ $GATEWAY_TQ -lt $LOWER_LIMIT ];
-then
-	echo "Gateway TQ is $GATEWAY_TQ node is considered offline"
-	for HOSTAPD in $(ls /var/run/hostapd-phy*); do #Check status for all physical devices
-		CURRENT_SSID=`grep "^ssid=$OFFLINE_SSID" $HOSTAPD | cut -d"=" -f2`
-		if [ $CURRENT_SSID == $OFFLINE_SSID ]
-		then
-			echo "SSID $CURRENT_SSID is correct, noting to do"
-			HUP_NEEDED=0
-			break
-		fi
-		CURRENT_SSID=`grep "^ssid=$ONLINE_SSID" $HOSTAPD | cut -d"=" -f2`
-		if [ $CURRENT_SSID == $ONLINE_SSID ]
-		then
-			logger -s -t "gluon-offline-ssid" -p 5 "TQ is $GATEWAY_TQ, SSID is $CURRENT_SSID, change to $OFFLINE_SSID" #Write Info to Syslog
-			sed -i s/^ssid=$ONLINE_SSID/ssid=$OFFLINE_SSID/ $HOSTAPD
-			HUP_NEEDED=1 # HUP here would be to early for dualband devices
-		else
-			echo "There is something wrong, did not find SSID $ONLINE_SSID or $OFFLINE_SSID"
-		fi
-	done
-fi
-
-if [ $GATEWAY_TQ -ge $LOWER_LIMIT -a $GATEWAY_TQ -le $UPPER_LIMIT ]; #This is just get a clean run if we are in-between the grace periode
-then
-	echo "TQ is $GATEWAY_TQ, do nothing"
-	HUP_NEEDED=0
-fi
-
-if [ $HUP_NEEDED == 1 ]; then
-	killall -HUP hostapd # Send HUP to all hostapd um die neue SSID zu laden
-	HUP_NEEDED=0
-	echo "HUP!"
+if [ $check -gt 0 ] ; then
+	if [ $(uci get wireless.client_radio0.ssid) -eq "$default" ] ; then exit 0 ; fi
+	wireless.client_radio0.ssid='freiburg.freifunk.net'
+        killall -HUP hostapd
 fi