dnsmngr: add unbound as selectable backend

* add dependencies for different backends in dhcpmngr and
  dnsmngr
* use CFLAG to indicate to data model code which backend is being
  used currently
* add uci-defaults script to set leasetrigger if unbound is dns
  backend

dhcpmngr/Makefile

@@ -28,7 +28,9 @@ define Package/dhcpmngr
   SECTION:=net
   CATEGORY:=Network
   TITLE:=Package to add Device.DHCPv4 and v6 data model support.
-  DEPENDS:=+libuci +libubox +libubus +libblobmsg-json +libjson-c +libbbfdm-api +dnsmasq
+  DEPENDS:=+libuci +libubox +libubus +libblobmsg-json +libjson-c +libbbfdm-api +odhcpd
+  DEPENDS+=+DNSMNGR_DNS_SD:umdns
+  DEPENDS+=+DNSMNGR_BACKEND_DNSMASQ:dnsmasq
 endef
 
 define Package/dhcpmngr/description
@@ -44,6 +46,10 @@ endif
 define Package/dhcpmngr/install
 	$(INSTALL_DIR) $(1)/etc/udhcpc.user.d
 	$(INSTALL_BIN) ./files/etc/udhcpc.user.d/udhcpc_lease_start_time.user $(1)/etc/udhcpc.user.d/udhcpc_lease_start_time.user
+ifeq ($(CONFIG_DNSMNGR_BACKEND_UNBOUND),y)
+	$(INSTALL_DIR) $(1)/etc/uci-defaults
+	$(INSTALL_DATA) ./files/etc/uci-defaults/unbound.odhcpd.uci_default $(1)/etc/uci-defaults/16-set-unbound-as-odhcpd-leasetrigger
+endif
 	$(BBFDM_INSTALL_MS_DM) $(PKG_BUILD_DIR)/src/libdhcpmngr.so $(1) $(PKG_NAME)
 endef
 

dhcpmngr/files/etc/uci-defaults/unbound.odhcpd.uci_default

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+# update odhcpd uci to use unbound's script as leasetrigger
+uci -q get dhcp.odhcpd >/dev/null 2>&1 && {
+	maindhcp="$(uci -q get dhcp.odhcpd.maindhcp)"
+
+	# if odhcpd is the main dhcp
+	[ "$maindhcp" = "1" ] || [ "$maindhcp" = "true" ] || [ "$maindhcp" = "on" ] && {
+		# if unbound daemon and unbound script file is present
+		[ -e /usr/lib/unbound/odhcpd.sh ] && [ -e /usr/sbin/unbound ] && {
+			# then set unbound script as leasetrigger in dhcp UCI
+			uci -q set dhcp.odhcpd.leasetrigger='/usr/lib/unbound/odhcpd.sh'
+			uci commit dhcp
+		}
+	}
+}
+
+exit 0

dnsmngr/Config.in

@@ -8,5 +8,23 @@ config DNSMNGR_DNS_SD
 	help
 	   Set this option to include support for TR-181 DNS.SD. object.
 
+choice
+	prompt "Select backend for DNS management"
+	default DNSMNGR_BACKEND_DNSMASQ
+	depends on PACKAGE_dnsmngr
+	help
+		Select which backend daemon to use for DNS
+
+config DNSMNGR_BACKEND_DNSMASQ
+	bool "Use dnsmasq for dns and dhcp"
+	help
+	   Enable this option to use dnsmasq + odhcpd for dns and dhcp.
+
+config DNSMNGR_BACKEND_UNBOUND
+	bool "Use unbound with odhcpd-full for dns and dhcp"
+	help
+	   Enable this option to use unbound + odhcpd for dns and dhcp.
+
+endchoice
 endmenu
 endif

dnsmngr/Makefile

@@ -27,13 +27,15 @@ MAKE_PATH:=src
 define Package/dnsmngr
   SECTION:=net
   CATEGORY:=Network
-  DEPENDS:=+libuci +libubox +libubus +libblobmsg-json +libjson-c +libbbfdm-api +dnsmasq
+  DEPENDS:=+libuci +libubox +libubus +libblobmsg-json +libjson-c +libbbfdm-api +odhcpd
   DEPENDS+=+DNSMNGR_DNS_SD:umdns
-  TITLE:=Package to add Device.DNS. datamodel support
+  DEPENDS+=+DNSMNGR_BACKEND_DNSMASQ:dnsmasq
+  DEPENDS+=+DNSMNGR_BACKEND_UNBOUND:unbound-daemon +DNSMNGR_BACKEND_UNBOUND:unbound-control
+  TITLE:=Package to configure DNS backend and TR-181 support
 endef
 
 define Package/dnsmngr/description
-  Package to add Device.DNS. datamodel support.
+  Package to configure DNS backend and TR-181 support.
 endef
 
 define Package/$(PKG_NAME)/config
@@ -56,6 +58,10 @@ define Build/Prepare
 endef
 endif
 
+ifeq ($(CONFIG_DNSMNGR_BACKEND_DNSMASQ),y)
+        TARGET_CFLAGS += -DDNSMASQ_BACKEND
+endif
+
 define Package/dnsmngr/install
 	$(BBFDM_INSTALL_MS_DM) $(PKG_BUILD_DIR)/src/libdnsmngr.so $(1) $(PKG_NAME)
 	$(BBFDM_INSTALL_SCRIPT) -d $(PKG_BUILD_DIR)/scripts/nslookup $(1)