Assign unique peer address

src/freedombone-mesh-batman

 COMPLETION_FILE=/root/${PROJECT_NAME}-completed.txt
 
 if [[ $1 == "start" ]]; then
-	# install avahi
-	sed -i "s|#host-name=.*|host-name=$(hostname)|g" /etc/avahi/avahi-daemon.conf
-	sed -i "s|host-name=.*|host-name=$(hostname)|g" /etc/avahi/avahi-daemon.conf
-	sed -i "s|use-ipv4=.*|use-ipv4=yes|g" /etc/avahi/avahi-daemon.conf
-	sed -i "s|use-ipv6=.*|use-ipv6=no|g" /etc/avahi/avahi-daemon.conf
-	sed -i "s|#disallow-other-stacks=.*|disallow-other-stacks=yes|g" /etc/avahi/avahi-daemon.conf
-	sed -i "s|hosts:.*|hosts:          files mdns4_minimal dns mdns4 mdns|g" /etc/nsswitch.conf
+    # install avahi
+    sed -i "s|#host-name=.*|host-name=$(hostname)|g" /etc/avahi/avahi-daemon.conf
+    sed -i "s|host-name=.*|host-name=$(hostname)|g" /etc/avahi/avahi-daemon.conf
+    sed -i "s|use-ipv4=.*|use-ipv4=yes|g" /etc/avahi/avahi-daemon.conf
+    sed -i "s|use-ipv6=.*|use-ipv6=no|g" /etc/avahi/avahi-daemon.conf
+    sed -i "s|#disallow-other-stacks=.*|disallow-other-stacks=yes|g" /etc/avahi/avahi-daemon.conf
+    sed -i "s|hosts:.*|hosts:          files mdns4_minimal dns mdns4 mdns|g" /etc/nsswitch.conf
 fi
 
 # Mesh definition
 WIFI_SSID=
 if ! grep -q "WIFI_SSID:" $COMPLETION_FILE; then
-	WIFI_SSID='mesh'
+    WIFI_SSID='mesh'
 else
-	WIFI_SSID=$(cat $COMPLETION_FILE | grep "WIFI_SSID:" | awk -F ':' '{print $2}')
+    WIFI_SSID=$(cat $COMPLETION_FILE | grep "WIFI_SSID:" | awk -F ':' '{print $2}')
 fi
 sed -i "s|WIFI_SSID:.*|WIFI_SSID:${WIFI_SSID}|g" $COMPLETION_FILE
 
 
 CHANNEL=
 if ! grep -q "Wifi channel:" $COMPLETION_FILE; then
-	CHANNEL=2
+    CHANNEL=2
 else
-	CHANNEL=$(cat $COMPLETION_FILE | grep "Wifi channel:" | awk -F ':' '{print $2}')
+    CHANNEL=$(cat $COMPLETION_FILE | grep "Wifi channel:" | awk -F ':' '{print $2}')
 fi
 sed -i "s|Wifi channel:.*|Wifi channel:${CHANNEL}|g" $COMPLETION_FILE
 
 EIFACE=eth0
 
 if [[ $IFACE == "wlan0" ]]; then
-	if grep -q "wlan1" /proc/net/dev; then
-		IFACE=wlan1
-	fi
+    if grep -q "wlan1" /proc/net/dev; then
+        IFACE=wlan1
+    fi
 fi
 if [[ $IFACE == "wlan0" ]]; then
-	if grep -q "wlan2" /proc/net/dev; then
-		IFACE=wlan2
-	fi
+    if grep -q "wlan2" /proc/net/dev; then
+        IFACE=wlan2
+    fi
 fi
 if [[ $IFACE == "wlan0" ]]; then
-	if grep -q "wlan3" /proc/net/dev; then
-		IFACE=wlan3
-	fi
+    if grep -q "wlan3" /proc/net/dev; then
+        IFACE=wlan3
+    fi
 fi
 
 if [ -e /etc/default/batctl ]; then
-	. /etc/default/batctl
+    . /etc/default/batctl
 fi
 
 function status {
-	batctl o
+    batctl o
 }
 
 function stop {
-	if [ -z "$IFACE" ]; then
-		echo 'error: unable to find wifi interface, not enabling batman-adv mesh'
-		return
-	fi
-	if [ "$EIFACE" ]; then
-		brctl delif $BRIDGE bat0
-		brctl delif $BRIDGE $EIFACE
-		ifconfig $BRIDGE down || true
-		brctl delbr $BRIDGE
-		ifconfig $EIFACE down -promisc
-	fi
-
-	avahi-autoipd -k $BRIDGE
-	avahi-autoipd -k $IFACE
-	ifconfig bat0 down -promisc
-
-	batctl if del $IFACE
-	rmmod batman-adv
-	ifconfig $IFACE mtu 1500
-	ifconfig $IFACE down
-	iwconfig $IFACE mode managed
-
-	iptables -D INPUT -p tcp --dport 548 -j ACCEPT
-	iptables -D INPUT -p udp --dport 548 -j ACCEPT
-	iptables -D INPUT -p tcp --dport 5353 -j ACCEPT
-	iptables -D INPUT -p udp --dport 5353 -j ACCEPT
-	iptables -D INPUT -p tcp --dport 5354 -j ACCEPT
-	iptables -D INPUT -p udp --dport 5354 -j ACCEPT
-	iptables -D INPUT -p tcp --dport $ZERONET_PORT -j ACCEPT
-	iptables -D INPUT -p udp --dport $ZERONET_PORT -j ACCEPT
-	iptables -D INPUT -p tcp --dport $IPFS_PORT -j ACCEPT
-
-	systemctl restart network-manager
+    if [ -z "$IFACE" ]; then
+        echo 'error: unable to find wifi interface, not enabling batman-adv mesh'
+        return
+    fi
+    if [ "$EIFACE" ]; then
+        brctl delif $BRIDGE bat0
+        brctl delif $BRIDGE $EIFACE
+        ifconfig $BRIDGE down || true
+        brctl delbr $BRIDGE
+        ifconfig $EIFACE down -promisc
+    fi
+
+    avahi-autoipd -k $BRIDGE
+    avahi-autoipd -k $IFACE
+    ifconfig bat0 down -promisc
+
+    batctl if del $IFACE
+    rmmod batman-adv
+    ifconfig $IFACE mtu 1500
+    ifconfig $IFACE down
+    iwconfig $IFACE mode managed
+
+    iptables -D INPUT -p tcp --dport 548 -j ACCEPT
+    iptables -D INPUT -p udp --dport 548 -j ACCEPT
+    iptables -D INPUT -p tcp --dport 5353 -j ACCEPT
+    iptables -D INPUT -p udp --dport 5353 -j ACCEPT
+    iptables -D INPUT -p tcp --dport 5354 -j ACCEPT
+    iptables -D INPUT -p udp --dport 5354 -j ACCEPT
+    iptables -D INPUT -p tcp --dport $ZERONET_PORT -j ACCEPT
+    iptables -D INPUT -p udp --dport $ZERONET_PORT -j ACCEPT
+    iptables -D INPUT -p tcp --dport $IPFS_PORT -j ACCEPT
+
+    systemctl restart network-manager
 }
 
 function verify {
-	tempfile="$(mktemp)"
-	batctl o > $tempfile
-	if grep -q "disabled" $tempfile; then
-		echo $'B.A.T.M.A.N. not enabled'
-		rm $tempfile
-		stop
-		exit 726835
-	fi
-	echo $'B.A.T.M.A.N. is running'
-	rm $tempfile
+    tempfile="$(mktemp)"
+    batctl o > $tempfile
+    if grep -q "disabled" $tempfile; then
+        echo $'B.A.T.M.A.N. not enabled'
+        rm $tempfile
+        stop
+        exit 726835
+    fi
+    echo $'B.A.T.M.A.N. is running'
+    rm $tempfile
+}
+
+function assign_peer_address {
+    for i in {1..6}; do
+        number=$RANDOM
+        let "number %= 255"
+        octet=$(echo "obase=16;$number" | bc)
+        if [ ${#octet} -lt 2 ]; then
+            octet="0${octet}"
+        fi
+        if [ $i -gt 1 ]; then
+            echo -n ":"
+        fi
+        echo -n "${octet}"
+    done
+    echo ''
 }
 
 function start {
-	if [ -z "$IFACE" ] ; then
-		echo 'error: unable to find wifi interface, not enabling batman-adv mesh'
-		exit 723657
-	fi
-	echo "info: enabling batman-adv mesh network $WIFI_SSID on $IFACE"
-
-	systemctl stop network-manager
-	sleep 5
-
-	# remove an avahi service which isn't used
-	if [ -f /etc/avahi/services/udisks.service ]; then
-		sudo rm /etc/avahi/services/udisks.service
-	fi
-
-	# Might have to re-enable wifi
-	rfkill unblock $(rfkill list|awk -F: "/phy/ {print $1}") || true
-
-	ifconfig $IFACE down
-	ifconfig $IFACE mtu 1532
-	iwconfig $IFACE enc off
-	iwconfig $IFACE mode ad-hoc essid $WIFI_SSID channel $CHANNEL
-	sleep 1
-	iwconfig $IFACE ap $CELLID
-
-	modprobe batman-adv
-	batctl if add $IFACE
-	ifconfig $IFACE up
-	avahi-autoipd --force-bind --daemonize --wait $BRIDGE
-	avahi-autoipd --force-bind --daemonize --wait $IFACE
-	ifconfig bat0 up promisc
-
-	#Use persistent HWAddr
-	ether_new=$(ifconfig eth0 | grep HWaddr | sed -e "s/.*HWaddr //")
-	if [ ! -f /var/lib/mesh-node/bat0 ]; then
-		mkdir /var/lib/mesh-node
-		echo "${ether_new}" > /var/lib/mesh-node/bat0
-	else
-		ether=$(cat /var/lib/mesh-node/bat0)
-		ifconfig bat0 hw ether ${ether}
-	fi
-
-	if [ "$EIFACE" ] ; then
-		brctl addbr $BRIDGE
-		brctl addif $BRIDGE bat0
-		brctl addif $BRIDGE $EIFACE
-		ifconfig bat0 0.0.0.0
-		ifconfig $EIFACE 0.0.0.0
-		ifconfig $EIFACE up promisc
-		ifconfig $BRIDGE up
-	fi
-
-	iptables -A INPUT -p tcp --dport 548 -j ACCEPT
-	iptables -A INPUT -p udp --dport 548 -j ACCEPT
-	iptables -A INPUT -p tcp --dport 5353 -j ACCEPT
-	iptables -A INPUT -p udp --dport 5353 -j ACCEPT
-	iptables -A INPUT -p tcp --dport 5354 -j ACCEPT
-	iptables -A INPUT -p udp --dport 5354 -j ACCEPT
-	iptables -A INPUT -p tcp --dport $ZERONET_PORT -j ACCEPT
-	iptables -A INPUT -p udp --dport $ZERONET_PORT -j ACCEPT
-	iptables -A INPUT -p tcp --dport $IPFS_PORT -j ACCEPT
-
-	systemctl restart avahi-daemon
-
-	verify
+    if [ -z "$IFACE" ] ; then
+        echo 'error: unable to find wifi interface, not enabling batman-adv mesh'
+        exit 723657
+    fi
+    echo "info: enabling batman-adv mesh network $WIFI_SSID on $IFACE"
+
+    systemctl stop network-manager
+    sleep 5
+
+    # remove an avahi service which isn't used
+    if [ -f /etc/avahi/services/udisks.service ]; then
+        sudo rm /etc/avahi/services/udisks.service
+    fi
+
+    # Might have to re-enable wifi
+    rfkill unblock $(rfkill list|awk -F: "/phy/ {print $1}") || true
+
+    ifconfig $IFACE down
+    ifconfig $IFACE mtu 1532
+    ifconfig $IFACE hw ether $(assign_peer_address)
+    iwconfig $IFACE enc off
+    iwconfig $IFACE mode ad-hoc essid $WIFI_SSID channel $CHANNEL
+    sleep 1
+    iwconfig $IFACE ap $CELLID
+
+    modprobe batman-adv
+    batctl if add $IFACE
+    ifconfig $IFACE up
+    avahi-autoipd --force-bind --daemonize --wait $BRIDGE
+    avahi-autoipd --force-bind --daemonize --wait $IFACE
+    ifconfig bat0 up promisc
+
+    #Use persistent HWAddr
+    ether_new=$(ifconfig eth0 | grep HWaddr | sed -e "s/.*HWaddr //")
+    if [ ! -f /var/lib/mesh-node/bat0 ]; then
+        mkdir /var/lib/mesh-node
+        echo "${ether_new}" > /var/lib/mesh-node/bat0
+    else
+        ether=$(cat /var/lib/mesh-node/bat0)
+        ifconfig bat0 hw ether ${ether}
+    fi
+
+    if [ "$EIFACE" ] ; then
+        brctl addbr $BRIDGE
+        brctl addif $BRIDGE bat0
+        brctl addif $BRIDGE $EIFACE
+        ifconfig bat0 0.0.0.0
+        ifconfig $EIFACE 0.0.0.0
+        ifconfig $EIFACE up promisc
+        ifconfig $BRIDGE up
+    fi
+
+    iptables -A INPUT -p tcp --dport 548 -j ACCEPT
+    iptables -A INPUT -p udp --dport 548 -j ACCEPT
+    iptables -A INPUT -p tcp --dport 5353 -j ACCEPT
+    iptables -A INPUT -p udp --dport 5353 -j ACCEPT
+    iptables -A INPUT -p tcp --dport 5354 -j ACCEPT
+    iptables -A INPUT -p udp --dport 5354 -j ACCEPT
+    iptables -A INPUT -p tcp --dport $ZERONET_PORT -j ACCEPT
+    iptables -A INPUT -p udp --dport $ZERONET_PORT -j ACCEPT
+    iptables -A INPUT -p tcp --dport $IPFS_PORT -j ACCEPT
+
+    systemctl restart avahi-daemon
+
+    verify
 }
 
 if ! grep -q "$IFACE" /proc/net/dev; then
-	echo 'Interface $IFACE was not found'
-	stop
-	exit 1
+    echo 'Interface $IFACE was not found'
+    stop
+    exit 1
 fi
 
 case "$1" in
-	start|stop|status)
-		$1
-		;;
-	restart)
-		stop
-		sleep 10
-		start
-		;;
-	ping)
-		batctl ping $2
-		;;
-	ls|list)
-		avahi-browse -atl
-		;;
-	*)
-		echo "error: invalid parameter $1"
-		echo 'usage: $0 {start|stop|restart|status|ping|ls|list}'
-		exit 2
-		;;
+    start|stop|status)
+        $1
+        ;;
+    restart)
+        stop
+        sleep 10
+        start
+        ;;
+    ping)
+        batctl ping $2
+        ;;
+    ls|list)
+        avahi-browse -atl
+        ;;
+    *)
+        echo "error: invalid parameter $1"
+        echo 'usage: $0 {start|stop|restart|status|ping|ls|list}'
+        exit 2
+        ;;
 esac
 exit 0