gluon-mesh-vpn-fastd: always use wan DNS servers to resolve the peers

package/gluon-mesh-vpn-fastd/Makefile

@@ -31,6 +31,8 @@ define Build/Compile
 endef
 
 define Package/gluon-mesh-vpn-fastd/install
+	$(CP) ./files/* $(1)/
+
 	$(INSTALL_DIR) $(1)/lib/gluon/upgrade/mesh-vpn-fastd/invariant
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/fastd.sh $(1)/lib/gluon/upgrade/mesh-vpn-fastd/invariant/010-mesh-vpn-fastd
 endef

package/gluon-mesh-vpn-fastd/files/etc/hotplug.d/iface/50-gluon-mesh-vpn-fastd

@@ -0,0 +1,3 @@
+[ "$INTERFACE" = 'wan' ] || exit 0
+
+/lib/gluon/mesh-vpn-fastd/update-dnsmasq

package/gluon-mesh-vpn-fastd/files/lib/gluon/mesh-vpn-fastd/update-dnsmasq

@@ -0,0 +1,101 @@
+#!/bin/sh
+
+
+. /lib/functions.sh
+
+
+_json_push() {
+	export JSON_PATH="${JSON_PATH}/$1"
+}
+
+_json_pop() {
+	export JSON_PATH="${JSON_PATH%/*}"
+}
+
+json_init() {
+	export JSON_PATH=''
+}
+
+json_add_object() {
+	_json_push "$1"
+}
+
+json_close_object() {
+	_json_pop
+}
+
+json_add_array() {
+	_json_push "$1"
+}
+
+json_close_array() {
+	_json_pop
+}
+
+json_add_int() {
+	return
+}
+
+json_add_boolean() {
+	return
+}
+
+json_add_double() {
+	return
+}
+
+json_add_string() {
+	[ "$JSON_PATH" = '/inactive/dns_server' ] || return
+	echo "$2"
+}
+
+
+get_dns_server() {
+	eval `jshn -r "$(ubus call network.interface.wan status)"`
+}
+
+generate_dnsmasq_conf_remote() {
+	local remote="$1"; local servers="$2"
+
+	local hostname="$(echo "$remote" | awk -F \" '{print $2}')"
+	[ -n "$hostname" ] || return
+
+	for ns in $servers; do
+		echo "server=/$hostname/$ns"
+	done
+}
+
+generate_dnsmasq_conf_peer() {
+	local peer="$1"; local servers="$2"
+	local enabled; local net
+
+	config_get_bool enabled "$peer" 'enabled' 0
+	[ "$enabled" -gt 0 ] || return
+
+	config_get net "$peer" 'net'
+	[ "$net" = 'mesh_vpn' ] || return
+
+	config_list_foreach "$peer" 'remote' generate_dnsmasq_conf_remote "$servers"
+}
+
+generate_dnsmasq_conf() {
+	local servers="$1"
+
+	config_load fastd
+	config_foreach generate_dnsmasq_conf_peer 'peer' "$servers"
+}
+
+
+mkdir -p /var/gluon/mesh-vpn-fastd
+generate_dnsmasq_conf "$(get_dns_server)" > /var/gluon/mesh-vpn-fastd/dnsmasq.conf.$$
+
+lock /var/gluon/mesh-vpn-fastd/dnsmasq.conf.lock
+
+if cmp -s /var/gluon/mesh-vpn-fastd/dnsmasq.conf.$$ /var/gluon/dnsmasq.d/mesh-vpn-fastd.conf; then
+	rm /var/gluon/mesh-vpn-fastd/dnsmasq.conf.$$
+else
+	mv -f /var/gluon/mesh-vpn-fastd/dnsmasq.conf.$$ /var/gluon/dnsmasq.d/mesh-vpn-fastd.conf
+	/etc/init.d/dnsmasq restart
+fi
+
+lock -u /var/gluon/mesh-vpn-fastd/dnsmasq.conf.lock