fff-autoconfig: Add IPv4 support

With this script, IPv4 can configurate automaticaly

Signed-off-by: Christian Dresel <freifunk@dresel.systems>

src/packages/fff/fff-autoconfig/files/usr/lib/autol3.d/20-ipv4.sh

@@ -0,0 +1,74 @@
+#!/bin/sh
+
+# first check is fff.autol3.ipv4 enabled
+if [ -z $(uci -q get fff.autol3.ipv4) ] ; then
+        exit;
+fi
+
+. /usr/share/libubox/jshn.sh
+
+MACADDR=$(cat /sys/class/net/br-client/address | /bin/sed 's/://g')
+MQTTSERVER=$(uci -q get fff.mqtt.server)
+ASSIGNEROWN=$(uci -q get fff.autol3.ipv4assigner)
+IPOWN=$(uci -q get fff.autol3.ipv4address)
+
+asknew() {
+	# Load Blocklist
+	ipv6assignerblock=$(uci get fff.autol3.ipv6assignerblock)
+	for ipv6assignerblock in $ipv6assignerblock; do
+	        block="$block -T  /ipv6/usethis/+/$ipv6assignerblock"  
+	done 
+        mosquitto_pub -h $MQTTSERVER -p 1883 -t '/ipv4/asknew' -m "$MACADDR"
+        # use the first income message
+        # cancel after 5 second, after this time we don't get any IP address
+        autol3config=$(mosquitto_sub -h $MQTTSERVER -p 1883 -t '/ipv4/usethis/#' -C 1 $block)
+        if [ -z "$autol3config" ] ; then
+                echo "No IP get"
+                exit 1;
+        fi
+        json_load "$autol3config"
+        json_get_var assigner assigner
+        json_get_var ip ip
+	ip=$(echo $ip | sed 's/\/.*//')
+        uci del gateway.meta.peer_ip
+	uci del gateway.@client[0].nat
+	uci del gateway.@client[0].ipaddr
+	uci del gateway.@client[0].dhcp_start
+        uci set gateway.meta.peer_ip=$ip
+	uci set gateway.@client[0].nat='1'
+	uci set gateway.@client[0].ipaddr='192.168.0.1/16'
+	uci set gateway.@client[0].dhcp_start='192.168.1.1'
+        uci commit gateway
+        uci set fff.autol3.ipv4address=$ip
+        uci set fff.autol3.ipv4assigner=$assigner
+	uci set fff.autol3.autoconfigl3=1
+        uci commit fff
+        exit;
+}
+
+canusethis() {
+        mosquitto_pub -h $MQTTSERVER -p 1883 -t /ipv4/canusethis/$ASSIGNEROWN -m "{ \"mac\":\"$MACADDR\", \"ip\":\"$IPOWN/32\" }"
+        canusethisanswer=$(mosquitto_sub -h $MQTTSERVER -p 1883 -t /ipv4/canusethisanswer/$MACADDR -C 1 -W 5)
+        # check if we get answer, if no load asknew again and get new ip address
+        if [ -z $canusethisanswer ] ; then
+                uci del fff.autol3.ipv4address
+                uci del fff.autol3.ipv4assigner
+		uci set fff.autol3.autoconfigl3=1
+                uci commit fff
+	        uci del gateway.meta.peer_ip
+	        uci del gateway.@client[0].nat
+        	uci del gateway.@client[0].ipaddr
+	        uci del gateway.@client[0].dhcp_start
+		uci commit gateway
+                asknew
+        fi
+}
+
+if [ -n $(uci -q get fff.autol3) ] && [ -z $(uci -q get fff.autol3.ipv4address) ] ; then
+        asknew
+fi
+
+if [ -n $(uci -q get fff.autol3.ipv4address) ] ; then
+        canusethis
+fi
+