ipv6-support: Add new IPv6-support meta-package

SVN-Revision: 34422

package/network/ipv6/ipv6-support/Makefile

@@ -0,0 +1,46 @@
+#
+# Copyright (C) 2010-2012 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=ipv6-support
+PKG_VERSION:=2012-11-29
+PKG_RELEASE:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/ipv6-support
+  SECTION:=ipv6
+  CATEGORY:=IPv6
+  DEPENDS:=+kmod-ipv6 +6relayd +odhcp6c +6distributed +ip6tables +ubus
+  TITLE:=Basic IPv6-support for Customer Edge Routers
+  MAINTAINER:=Steven Barth <steven@midlink.org>
+  PKGARCH:=all
+endef
+
+define Package/ipv6-support/description
+This package provides basic IPv6 support including Router Discovery,
+DHCPv6 (client & server), prefix delegation and distribution.
+endef
+
+define Build/Compile
+endef
+
+define Build/Configure
+endef
+
+define Package/ipv6-support/install
+	$(INSTALL_DIR) $(1)/etc/hotplug.d/iface
+	$(INSTALL_DATA) ./files/ipv6.hotplug $(1)/etc/hotplug.d/iface/20-ipv6
+	$(INSTALL_DIR) $(1)/lib/ipv6
+	$(INSTALL_DATA) ./files/support.sh $(1)/lib/ipv6/support.sh
+	$(INSTALL_BIN) ./files/dhcpv6.sh $(1)/lib/ipv6/dhcpv6.sh
+	$(INSTALL_DIR) $(1)/etc/config
+	$(INSTALL_DATA) ./files/network6.config $(1)/etc/config/network6
+endef
+
+$(eval $(call BuildPackage,ipv6-support))

package/network/ipv6/ipv6-support/files/dhcpv6.sh

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+#!/bin/sh
+# Copyright (c) 2012 OpenWrt.org
+. /lib/ipv6/support.sh
+. /lib/netifd/netifd-proto.sh
+
+local device="$1"
+local state="$2"
+local network=""
+
+resolve_network network "$device"
+
+# Unknown network
+[ -z "$network" ] && exit 0
+
+
+# Announce prefixes
+for prefix in $PREFIXES; do
+	announce_prefix "$prefix" "$network"
+done
+
+for prefix in $PREFIXES_LOST; do
+	announce_prefix "$prefix" "$network" delprefix
+done
+
+
+# Enable relaying if requested
+local prefix_fallback
+config_get prefix_fallback "$network" prefix_fallback
+[ "$prefix_fallback" == "relay" -a -z "$PREFIXES" -a "$state" != "unbound" ] &&
+	restart_relay "$network" 1
+
+# Disable relay if requested
+[ "$prefix_fallback" != "relay" -o -n "$PREFIXES" -o "$state" == "unbound" ] &&
+	stop_relay "$network"
+
+
+# Operations in case of success
+[ "$state" == "timeout" || "$state" == "unbound" ] && exit 0
+
+local peerdns
+config_get_bool peerdns "$network" peerdns 0
+[ "peerdns" -eq "1" ] && {
+	proto_init_update "*" 1
+	for server in $RDNSS; do
+		proto_add_dns_server "$server"
+	done
+	for domain in $DOMAINS; do
+		proto_add_dns_search "$domain"
+	done
+	proto_send_update "$network"
+}
+

package/network/ipv6/ipv6-support/files/ipv6.hotplug

@@ -0,0 +1,18 @@
+#!/bin/sh
+# Copyright (c) 2012 OpenWrt.org
+[ "$DEVICE" == "lo" ] && exit 0
+. /lib/ipv6/support.sh
+
+local mode
+config_get mode "$INTERFACE" mode
+
+case "$ACTION" in
+	ifup)
+		[ "$mode" != "downstream" ] && enable_static $INTERFACE $DEVICE
+		[ "$mode" == "upstream" ] && enable_upstream $INTERFACE $DEVICE
+		[ "$mode" == "downstream" ] && enable_downstream $INTERFACE $DEVICE
+	;;
+	ifdown)
+		disable_interface $INTERFACE $DEVICE
+	;;
+esac

package/network/ipv6/ipv6-support/files/network6.config

@@ -0,0 +1,17 @@
+config interface wan
+	option mode		upstream
+	option ula_prefix	auto
+	option request_prefix	auto
+	option prefix_fallback	relay
+	option peerdns		1	
+
+
+config interface lan
+	option mode		downstream
+	option advertise_prefix	64
+	option relay_master	wan
+
+
+config interface 6in4
+	option mode		static
+	list static_prefix	2001:DB8::/48

package/network/ipv6/ipv6-support/files/support.sh

@@ -0,0 +1,304 @@
+#!/bin/sh
+# Copyright (c) 2012 OpenWrt.org
+. /lib/functions.sh
+. /lib/functions/service.sh
+. /lib/functions/network.sh
+
+config_load network6
+
+
+conf_get() {
+	local __return="$1"
+	local __device="$2"
+	local __option="$3"
+	local __value=$(cat "/proc/sys/net/ipv6/conf/$device/$option")
+	eval "$__return=$__value"
+}
+
+
+conf_set() {
+	local device="$1"
+	local option="$2"
+	local value="$3"
+	echo "$value" > "/proc/sys/net/ipv6/conf/$device/$option"
+}
+
+
+stop_service() {
+	local __exe="$1"
+	SERVICE_PID_FILE="$2"
+	local __return="$3"
+
+	service_check "$__exe" && {
+		service_stop "$__exe"
+		[ -n "$__return" ] && eval "$__return=1"
+	}
+	rm -f "$SERVICE_PID_FILE"
+}
+
+
+start_service() {
+	local cmd="$1"
+	local pidfile="$2"
+
+	SERVICE_DAEMONIZE=1
+	SERVICE_WRITE_PID=1
+	SERVICE_PID_FILE="$pidfile"
+	service_start $cmd
+}
+
+
+resolve_network_add() {
+	local __section="$1"
+	local __device="$2"
+	local __return="$3"
+
+	local __cdevice
+	network_get_device __cdevice "$__section"
+	[ "$__cdevice" != "$__device" ] && return
+	
+	eval "$__return"'="'"$__section"'"'
+}
+
+
+resolve_network() {
+	local __return="$1"
+	local __device="$2"
+	config_foreach resolve_network_add interface "$__device" "$__return"
+}
+
+
+announce_prefix() {
+	local prefix="$1"
+	local network="$2"
+	local cmd="$3"
+
+	local addr=$(echo "$prefix" | cut -d/ -f1)
+	local rem=$(echo "$prefix" | cut -d/ -f2)
+	local length=$(echo "$rem" | cut -d, -f1)
+	local prefer=""
+	local valid=""
+
+	# If preferred / valid provided
+	[ "$rem" != "$length" ] && {
+		prefer=$(echo "$rem" | cut -d, -f2)
+		valid=$(echo "$rem" | cut -d, -f3)
+	}
+
+	local msg='{"network": "'"$network"'", "prefix": "'"$addr"'", "length": '"$length"
+	[ -n "$valid" ] && msg="$msg"', "valid": '"$valid"', "preferred": '"$prefer"
+	[ -z "$cmd" ] && cmd=newprefix
+	
+	ubus call 6distributed "$cmd" "$msg}"
+}
+
+
+disable_downstream() {
+	local network="$1"
+
+	# Notify the address distribution daemon
+	ubus call 6distributed deliface '{"network": "'"$network"'"}'
+
+	# Disable advertisement daemon
+	stop_service /usr/sbin/6relayd "/var/run/ipv6-downstream-$network.pid"
+}
+
+
+restart_relay_add() {
+	local __section="$1"
+	local __return="$2"
+	local __master="$3"
+	local __disable="$4"
+
+	network_is_up "$__section" || return
+
+	# Match master network
+	local __cmaster=""
+	config_get __cmaster "$__section" relay_master
+	[ "$__master" != "$__cmaster" ] && return
+	
+	# Disable any active distribution
+	disable_downstream "$__section"
+
+	local __device=""
+	network_get_device __device "$__section"
+	
+	# Coming from stop relay, reenable distribution
+	[ "$__disable" == "disable" ] && {
+		enable_downstream "$__section" "$__device"
+		return
+	}
+
+	
+	eval "$__return"'="$'"$__return"' '"$__device"'"'
+}
+
+
+stop_relay() {
+	local network="$1"
+	local pid="/var/run/ipv6-relay-$network.pid"
+	local was_running=""
+	
+	stop_service /usr/sbin/6relayd "$pid" was_running
+
+	# Reenable normal distribution on slave interfaces	
+	[ -n "$was_running" ] && config_foreach restart_relay_add interface dummy "$network" disable
+}
+
+
+restart_relay() {
+	local network="$1"
+	local force="$2"
+	local pid="/var/run/ipv6-relay-$network.pid"
+
+	local not_running=0
+	[ -f "$pid" ] || not_running=1
+
+	# Don't start if not desired
+	[ "$force" != "1" ] && [ "$not_running" == "1" ] && return
+
+	# Kill current relay and distribution daemon
+	stop_relay "$network"
+
+	# Detect master device
+	local device=""
+	network_get_device device $network
+
+	# Generate command string
+	local cmd="/usr/sbin/6relayd -A $device "
+	config_foreach restart_relay_add interface cmd "$network"
+
+	# Start relay
+	start_service "$cmd" "$pid"
+}
+
+
+restart_master_relay() {
+	local network="$1"
+
+	# Disable active relaying to this interface
+	local relay_master
+	config_get relay_master "$network" relay_master
+	[ -n "$relay_master" ] && restart_relay "$relay_master"
+}
+
+
+disable_interface() {
+	local network="$1"
+
+	# Delete all prefixes routed to this interface
+	ubus call 6distributed delprefix '{"network": "'"$network"'"}'
+
+	# Restart Relay
+	restart_master_relay "$network"
+
+	# Disable distribution
+	disable_downstream "$network"
+
+	# Disable relay
+	stop_relay "$network"
+
+	# Disable DHCPv6 client if enabled, state script will take care
+	stop_service /usr/sbin/odhcp6c "/var/run/ipv6-upstream-$network.pid"
+}
+
+
+enable_static() {
+	local network="$1"
+	local device="$2"
+
+	# Enable global forwarding
+	local global_forward
+	conf_get global_forward all forwarding
+	[ "$global_forward" != "1" ] && conf_set all forwarding 1
+
+	# Configure device
+	conf_set "$device" accept_ra 1
+	conf_set "$device" forwarding 1
+
+	# ULA-integration
+	local ula_prefix=""
+	config_get ula_prefix "$network" ula_prefix
+
+	# ULA auto configuration (first init)
+	[ "$ula_prefix" == "auto" ] && {
+		local r1=""
+		local r2=""
+		local r3=""
+
+		# Sometimes results are empty, therefore try until it works...		
+		while [ -z "$r1" -o -z "$r2" -o -z "$r3" ]; do
+			r1=$(printf "%02x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 256)))
+			r2=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
+			r3=$(printf "%01x" $(($(</dev/urandom tr -dc 0-9 | dd bs=9 count=1) % 65536)))
+		done
+		
+		ula_prefix="fd$r1:$r2:$r3::/48"
+
+		# Save prefix so it will be preserved across reboots
+		uci set network6.$network.ula_prefix=$ula_prefix
+		uci commit network6
+	}
+
+	# Announce ULA
+	[ -n "$ula_prefix" ] && announce_prefix $ula_prefix $network
+
+	# Announce all static prefixes
+	config_list_foreach "$network" static_prefix announce_prefix $network
+}
+
+
+enable_downstream() {
+	local network="$1"
+	local device="$2"
+
+	# Get IPv6 prefixes
+	local length
+	config_get length "$network" advertise_prefix
+	[ -z "$length" ] && length=64
+	[ "$length" -ne "0" ] && ubus call 6distributed newiface '{"network": "'"$network"'", "iface": "'"$device"'", "length": '"$length"'}'
+
+	# Start RD & DHCPv6 service
+	local pid="/var/run/ipv6-downstream-$network.pid"
+	start_service "/usr/sbin/6relayd -Rserver -Dserver . $device" "$pid"
+
+	# Try relaying if necessary
+	restart_master_relay "$network"
+}
+
+
+enable_upstream() {
+	local network="$1"
+	local device="$2"
+	
+	# Configure device
+	conf_set "$device" accept_ra 2
+	conf_set "$device" forwarding 2
+	
+	# Trigger RS
+	conf_set "$device" disable_ipv6 1
+	conf_set "$device" disable_ipv6 0
+
+	# Configure DHCPv6-client
+	local dhcp6_opts="$device"
+
+	# Configure DHCPv6-client (e.g. requested prefix)
+	local request_prefix
+	config_get request_prefix "$network" request_prefix
+	[ -z "$request_prefix" ] && request_prefix="auto"
+	[ "$request_prefix" != "no" ] && {
+		[ "$request_prefix" == "auto" ] && request_prefix=0
+		dhcp6_opts="-P$request_prefix $dhcp6_opts"
+	}
+	
+	# Start DHCPv6 client
+	local pid="/var/run/ipv6-upstream-$network.pid"
+	start_service "/usr/sbin/odhcp6c -s/lib/ipv6/dhcpv6.sh $dhcp6_opts" "$pid"
+
+	# Refresh RA on all interfaces
+	for pid in /var/run/ipv6-downstream-*.pid; do
+		kill -SIGUSR1 $(cat "$pid")
+	done
+}
+
+