6relayd: various updates & fixes

- Add RD- and DHCPv6-server functionality
	- Rework configuration and add example UCI file
	- Fix various bugs and be more RFC compliant

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34204 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/network/ipv6/6relayd/Makefile

@@ -8,14 +8,14 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=6relayd
-PKG_VERSION:=2012-11-01
+PKG_VERSION:=2012-11-16
 PKG_RELEASE=$(PKG_SOURCE_VERSION)
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
 PKG_SOURCE_URL:=git://nbd.name/6relayd.git
 PKG_SOURCE_PROTO:=git
-PKG_SOURCE_VERSION:=3f8db4e75d6ac98ea290e0b52e4e2cff91bcee8c
+PKG_SOURCE_VERSION:=f0fec4df02e3310de134e46e9826dbeedb86119a
 
 PKG_MAINTAINER:=Steven Barth <steven@midlink.org>
 
@@ -25,7 +25,7 @@ include $(INCLUDE_DIR)/cmake.mk
 define Package/6relayd
   SECTION:=ipv6
   CATEGORY:=IPv6
-  TITLE:=IPv6-Relay (RD-, DHCPv6- & NDP-Proxy)
+  TITLE:=IPv6-Relay and Server (RD-, DHCPv6- & NDP-Proxy)
   DEPENDS:=+kmod-ipv6
 endef
 
@@ -34,6 +34,9 @@ define Package/6relayd/description
  discovery, neighbor discovery and DHCPv6 so that clients on routed (non-
  bridged) interfaces can use the public address prefix, DHCPv6 and DNS-service
  of a master interface. This is useful to avoid NAT in chained IPv6-routers.
+
+ It can also be used as a lightweight router advertisement daemon and provide
+ stateless DHCPv6 service where size matters.
 endef
 
 define Package/6relayd/install
@@ -41,6 +44,8 @@ define Package/6relayd/install
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/6relayd $(1)/usr/sbin/
 	$(INSTALL_DIR) $(1)/etc/hotplug.d/iface
 	$(INSTALL_DATA) ./files/6relayd.hotplug $(1)/etc/hotplug.d/iface/30-6relay
+	$(INSTALL_DIR) $(1)/etc/config
+	$(INSTALL_DATA) ./files/6relayd.config $(1)/etc/config/6relayd
 	$(INSTALL_DIR) $(1)/etc/init.d
 	$(INSTALL_BIN) ./files/6relayd.init $(1)/etc/init.d/6relayd
 endef

package/network/ipv6/6relayd/files/6relayd.config

@@ -0,0 +1,17 @@
+# Example #1: Create a relay for several networks in proxy mode
+# This can be used to proxy Router Discovery, DHCPv6 and NDP.
+
+#config relay
+#	option network	'wan lan'
+#	option rd	'relay'
+#	option dhcpv6	'relay'
+#	option ndp	'relay'
+
+
+# Example #2: Provide Router Discovery and stateless DHCPv6 in server mode
+# This can be used as a small radvd and stateless DHCPv6-server replacement.
+
+#config server
+#	option network	'lan'
+#	option rd	'server'
+#	option dhcpv6	'server'

package/network/ipv6/6relayd/files/6relayd.init

@@ -18,13 +18,10 @@ resolve_network() {
 
 start_6relayd() {
 	local cfg="$1"
-
-	local args="-S -l"
+	local mode="$2"
+	local args="-s -l"
 	local ifaces=""
 
-	config_get proto "$cfg" proto
-	[[ "$proto" == 6relay ]] || return 0
-
 	SERVICE_DAEMONIZE=1
 	SERVICE_WRITE_PID=1
 	SERVICE_PID_FILE="/var/run/6relayd-$cfg.pid"
@@ -50,28 +47,30 @@ start_6relayd() {
 		resolve_ifname "$ifn"
 	done
 
-	local forward_rd # = 1
-	config_get_bool forward_rd "$cfg" forward_rd 1
-	[ $forward_rd -eq 1 ] && append args "-R"
+	local rd
+	config_get rd "$cfg" rd
+	[ -n "$rd" ] && append args "-R$rd"
 
-	local forward_dhcpv6 # = 1
-	local forward_dhcpv6_mode # = relay
-	config_get_bool forward_dhcpv6 "$cfg" forward_dhcpv6 1
-	config_get forward_dhcpv6_mode "$cfg" forward_dhcpv6_mode
-	[ $forward_dhcpv6 -eq 1 ] && append args "-D$forward_dhcpv6_mode"
+	local dhcpv6
+	config_get dhcpv6 "$cfg" dhcpv6
+	[ -n "$dhcpv6" ] && append args "-D$dhcpv6"
 
-	local forward_ndp # = 1
-	config_get_bool forward_ndp "$cfg" forward_ndp 1
-	[ $forward_ndp -eq 1 ] && append args "-N"
+	local ndp
+	config_get ndp "$cfg" ndp
+	[ "$ndp" == "relay" ] && append args "-N -r"
 
-	local configure_routes # = 1
-	config_get_bool configure_routes "$cfg" configure_routes 1
-	[ $configure_routes -eq 1 ] && append args "-r"
-
-	local always_rewrite_dns # = 0
+	local always_rewrite_dns
 	config_get_bool always_rewrite_dns "$cfg" always_rewrite_dns 0
 	[ $always_rewrite_dns -eq 1 ] && append args "-n"
 
+	# In server mode the first interface needs to be passed twice
+	[ "$mode" == "server" ] && {
+		for iface in $ifaces; do
+			ifaces="$iface $ifaces"
+			break
+		done
+	}
+
 	service_start /usr/sbin/6relayd $args $ifaces
 }
 
@@ -85,6 +84,7 @@ stop() {
 
 start() {
 	include /lib/network
-	config_load network
-	config_foreach start_6relayd interface
+	config_load 6relayd
+	config_foreach start_6relayd relay relay
+	config_foreach start_6relayd server server
 }