splits configuration and implementation for different ubnt setups

* introduces new file network.mode currently only used for nanostation
* network.mode is added to sysupgrade.conf
=> once configured the the setting should survive an upgrade

Reviewed-by: Tim Niemeyer <tim.niemeyer@mastersword.de>

bsp/default/root_file_system/etc/sysupgrade.conf

-/etc/shadow
\ No newline at end of file
+/etc/shadow
+/etc/network.mode

bsp/ubnt-nano-m/root_file_system/etc/network.mode

+#what should the one eth0 ethernet port be used for?
+#directly connect to other mesh nodes - this is the default
+ETHMODE="BATMAN"
+
+#Connect with fastd vpn
+#ETHMODE="WAN"
+
+#connect normal ff-clients
+#ETHMODE="CLIENT"
+
+################
+## If you want to change the behavior of eth0, you can change it above.
+## After that you have to reset the config with following commands.
+#cp /rom/etc/sysctl.conf /etc/sysctl.conf
+#cp /rom/etc/config/network /etc/config/network
+#reboot
+################
+

bsp/ubnt-nano-m/root_file_system/etc/network.nanostation-m

@@ -4,6 +4,8 @@ CLIENT_PORTS=""
 WAN_PORTS=""
 BATMAN_PORTS=""
 
+. /etc/network.mode
+
 CLIENTIF="w2ap"
 ETHMESHMAC=
 ROUTERMAC=w2mesh
@@ -12,24 +14,18 @@ uci set network.$SWITCHDEV=interface
 uci set network.$SWITCHDEV.ifname=$SWITCHDEV
 uci set network.mesh.ifname="bat0"
 
-################
-## If you want to change the behavior of eth0, you can change it here.
-## After that you have to reset the config with following commands.
-#cp /rom/etc/sysctl.conf /etc/sysctl.conf
-#cp /rom/etc/config/network /etc/config/network
-#reboot
-################
-
-## Activate for WAN:
-#echo "net.ipv6.conf.$WANDEV.accept_ra_defrtr = 1" >> /etc/sysctl.conf
-#echo "net.ipv6.conf.$WANDEV.accept_ra_pinfo = 1" >> /etc/sysctl.conf
-#echo "net.ipv6.conf.$WANDEV.autoconf = 1" >> /etc/sysctl.conf
-#echo "net.ipv6.conf.$WANDEV.accept_ra_rtr_pref = 1" >> /etc/sysctl.conf
-#uci set network.wan.ifname=$WANDEV
-
-## Activate for BATMAN:
-uci set network.ethmesh.ifname="$SWITCHDEV"
-
-## Activate for Client:
-#CLIENTIF="w2ap eth0"
-#uci set network.mesh.ifname="bat0 $SWITCHDEV"
+if [ "$ETHMODE" = "WAN" ] ; then
+  ## Activate for WAN:
+  echo "net.ipv6.conf.$WANDEV.accept_ra_defrtr = 1" >> /etc/sysctl.conf
+  echo "net.ipv6.conf.$WANDEV.accept_ra_pinfo = 1" >> /etc/sysctl.conf
+  echo "net.ipv6.conf.$WANDEV.autoconf = 1" >> /etc/sysctl.conf
+  echo "net.ipv6.conf.$WANDEV.accept_ra_rtr_pref = 1" >> /etc/sysctl.conf
+  uci set network.wan.ifname=$WANDEV
+elif [ "$ETHMODE" = "CLIENT" ] ; then
+  ## Activate Client:
+  CLIENTIF="w2ap eth0"
+  uci set network.mesh.ifname="bat0 $SWITCHDEV"
+else
+  ## Activate BATMAN:
+  uci set network.ethmesh.ifname="$SWITCHDEV"
+fi