gluon-mesh-batman-adv: add DNS support

package/gluon-mesh-batman-adv/files/lib/gluon/dnsmasq.d/010-mesh-batman-adv.conf

+/var/gluon/mesh-batman-adv/dnsmasq.conf
\ No newline at end of file

package/gluon-mesh-batman-adv/files/lib/gluon/upgrade/mesh-batman-adv/invariant/011-mesh

@@ -26,6 +26,10 @@ uci_set firewall client output 'ACCEPT'
 uci_set firewall client forward 'REJECT'
 uci_commit firewall
 
+uci_set dhcp '@dnsmasq[0]' boguspriv '0'
+uci_set dhcp '@dnsmasq[0]' localise_queries '0'
+uci_set dhcp '@dnsmasq[0]' rebind_protection '0'
+
 uci_remove dhcp client
 uci_add dhcp dhcp client
 uci_set dhcp client interface 'client'

package/gluon-mesh-batman-adv/generate/lib/gluon/odhcp6c.d/010-mesh-batman-adv

+#!/bin/sh
+
+[ "$INTERFACE" = 'client' ] || exit 0
+
+mkdir -p /var/gluon/mesh-batman-adv
+
+for ns in $RDNSS $RA_DNS; do
+	for domain in @mesh_domains@; do
+		echo "server=/$domain/$ns"
+	done
+done > /var/gluon/mesh-batman-adv/dnsmasq.conf.$$
+
+if cmp -s /var/gluon/mesh-batman-adv/dnsmasq.conf.$$ /var/gluon/mesh-batman-adv/dnsmasq.conf; then
+	rm /var/gluon/mesh-batman-adv/dnsmasq.conf.$$
+	exit 0
+fi
+
+lock /var/gluon/mesh-batman-adv/dnsmasq.conf.lock
+mv -f /var/gluon/mesh-batman-adv/dnsmasq.conf.$$ /var/gluon/mesh-batman-adv/dnsmasq.conf
+/etc/init.d/dnsmasq restart
+lock -u /var/gluon/mesh-batman-adv/dnsmasq.conf.lock