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

2 files changed, 40 insertions, 23 deletions

diff --git a/package/network/ipv6/6relayd/files/6relayd.config b/package/network/ipv6/6relayd/files/6relayd.config
new file mode 100644
index 0000000000..c5431d31b2
--- /dev/null
+++ b/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'
diff --git a/package/network/ipv6/6relayd/files/6relayd.init b/package/network/ipv6/6relayd/files/6relayd.init
index a53bdb1977..f1c100b2e5 100644
--- a/package/network/ipv6/6relayd/files/6relayd.init
+++ b/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
-	[ $forward_rd -eq 1 ] && append args "-R"
-
-	local forward_dhcpv6 # = 1
-	local forward_dhcpv6_mode # = relay
-	config_get_bool forward_dhcpv6 "$cfg" forward_dhcpv6 1
-	config_get forward_dhcpv6_mode "$cfg" forward_dhcpv6_mode
-	[ $forward_dhcpv6 -eq 1 ] && append args "-D$forward_dhcpv6_mode"
+	local rd
+	config_get rd "$cfg" rd
+	[ -n "$rd" ] && append args "-R$rd"
 
-	local forward_ndp # = 1
-	config_get_bool forward_ndp "$cfg" forward_ndp 1
-	[ $forward_ndp -eq 1 ] && append args "-N"
+	local dhcpv6
+	config_get dhcpv6 "$cfg" dhcpv6
+	[ -n "$dhcpv6" ] && append args "-D$dhcpv6"
 
-	local configure_routes # = 1
-	config_get_bool configure_routes "$cfg" configure_routes 1
-	[ $configure_routes -eq 1 ] && append args "-r"
+	local ndp
+	config_get ndp "$cfg" ndp
+	[ "$ndp" == "relay" ] && append args "-N -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
 }