gateway.d: Add scripts for network configuration

This adds scripts to configure vlan and client network.
This also adds sysctl settings to enable forwarding.

Note:
Devices specific properties are sourced from fff-network package.
This creates a dependency on fff-boardname and fff-network.
These properties should be located elsewhere in the future.

Signed-off-by: Fabian Bläse <fabian@blaese.de>
Reviewed-by: Tim Niemeyer <tim@tn-x.org>
Reviewed-by: Robert Langhammer <rlanghammer@web.de>

src/packages/fff/fff-gateway/Makefile

@@ -13,6 +13,7 @@ define Package/fff-gateway
 	CATEGORY:=Freifunk
 	TITLE:= Freifunk-Franken gateway configuration
 	URL:=https://www.freifunk-franken.de
+	DEPENDS:=+fff-boardname +fff-network
 endef
 
 define Package/fff-gateway/description

src/packages/fff/fff-gateway/files/etc/gateway.d/20-vlan

@@ -0,0 +1,48 @@
+# load uci functions
+. /lib/functions.sh
+
+# load board specific properties
+BOARD="$(uci get board.model.name)"
+. /etc/network.$BOARD
+. /lib/functions/fff/cpuport
+
+
+configure() {
+	add_vlan() {
+		local vlan="$1"
+		local ports=$(uci get gateway.$vlan.ports)
+		local name="$SWITCHDEV"_$vlan
+
+		uci set network.$name='switch_vlan'
+		uci set network.$name.device="$(uci get network.$SWITCHDEV.name)"
+		uci set network.$name.vlan="$vlan"
+		uci set network.$name.ports="$CPUPORT $ports"
+	}
+
+	remove_vlan() {
+		local name="$1"
+
+		local switchdev=$(echo $name | cut -d_ -f1)
+		local vlan=$(echo $name | cut -d_ -f2)
+
+		# only remove vlans not present in gateway config
+		if ! uci -q get gateway.$vlan > /dev/null; then
+			# remove switch_vlan
+			uci del network.$name
+		fi
+	}
+
+	config_load network
+	config_foreach remove_vlan switch_vlan
+
+	config_load gateway
+	config_foreach add_vlan vlan
+}
+
+apply() {
+	uci commit network
+}
+
+revert() {
+	uci revert network
+}

src/packages/fff/fff-gateway/files/etc/gateway.d/30-network-client

@@ -0,0 +1,71 @@
+# load board specific properties
+BOARD="$(uci get board.model.name)"
+. /etc/network.$BOARD
+
+
+configure() {
+	# ipaddr
+	#remove old ipaddr
+	uci -q del network.mesh.ipaddr
+	#set new ipaddr
+	if ipaddr=$(uci -q get gateway.@client[0].ipaddr); then
+		for ip in $ipaddr; do
+			uci add_list network.mesh.ipaddr=$ip
+		done
+	else
+		echo "WARNING: No client ipaddr set!"
+	fi
+	#put interface routes from set addresses into fff table
+	uci set network.mesh.ip4table='fff'
+
+	# ip6addr
+	#remove old ip6addr
+	for ip in $(uci get network.mesh.ip6addr); do
+		if echo "$ip" | grep -v -e "fdff:" -e "fe80::1/64" > /dev/null; then
+			uci del_list network.mesh.ip6addr="$ip"
+		fi
+	done
+	#set new ip6addr
+	if ip6addr=$(uci -q get gateway.@client[0].ip6addr); then
+		for ip in $ip6addr; do
+			uci add_list network.mesh.ip6addr=$ip
+		done
+	else
+		echo "WARNING: No client ip6addr set!"
+	fi
+	#put interface routes from set addresses into fff table
+	uci set network.mesh.ip6table='fff'
+
+	# dhcp
+	uci -q del dhcp.mesh.start
+	uci -q del dhcp.mesh.limit
+	if dhcp_start=$(uci -q get gateway.@client[0].dhcp_start); then
+		uci set dhcp.mesh=dhcp
+		uci set dhcp.mesh.interface=mesh
+		uci set dhcp.mesh.start=$dhcp_start
+		uci set dhcp.mesh.limit=$(uci -q get gateway.@client[0].dhcp_limit)
+	else
+		echo "WARNING: No DHCP range start and/or limit set!"
+	fi
+
+	# set interface
+	#remove all eth interfaces
+	ifaces=$(uci get network.mesh.ifname | sed 's/\beth[^ ]* *//g')
+	if vlan=$(uci -q get gateway.@client[0].vlan); then
+		uci set network.mesh.ifname="${SWITCHDEV}.$vlan $ifaces"
+	elif iface=$(uci -q get gateway.@client[0].iface); then
+		uci set network.mesh.ifname="$iface $ifaces"
+	else
+		echo "WARNING: No Interface for client specified"
+	fi
+}
+
+apply() {
+	uci commit network
+	uci commit dhcp
+}
+
+revert() {
+	uci revert network
+	uci revert dhcp
+}

src/packages/fff/fff-gateway/files/etc/sysctl.d/60-fff-gateway.conf

@@ -0,0 +1,5 @@
+# Enable forwarding
+net.ipv4.conf.all.forwarding=1
+net.ipv4.ip_forward=1
+net.ipv6.conf.all.forwarding=1
+net.ipv6.conf.default.forwarding=1