From f9101da96f814c8d0d2f9cd8e562a2f7408b3132 Mon Sep 17 00:00:00 2001
From: Steven Barth <cyrus@openwrt.org>
Date: Fri, 24 May 2013 13:03:59 +0000
Subject: [PATCH] AA: add ipv6-support for transitioning between IPv6-stacks

SVN-Revision: 36712
---
 package/ipv6-support/Makefile                 | 50 +++++++++++++++++++
 package/ipv6-support/files/ipv6-boot          | 15 ++++++
 .../files/network-enable-ipv6.defaults        | 27 ++++++++++
 3 files changed, 92 insertions(+)
 create mode 100644 package/ipv6-support/Makefile
 create mode 100755 package/ipv6-support/files/ipv6-boot
 create mode 100755 package/ipv6-support/files/network-enable-ipv6.defaults

diff --git a/package/ipv6-support/Makefile b/package/ipv6-support/Makefile
new file mode 100644
index 0000000000..efa2fb0fcf
--- /dev/null
+++ b/package/ipv6-support/Makefile
@@ -0,0 +1,50 @@
+#
+# 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:=2013-05-23
+PKG_RELEASE:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/ipv6-support
+  SECTION:=ipv6
+  CATEGORY:=IPv6
+  DEPENDS:=+kmod-ipv6 +6relayd +odhcp6c +ip6tables
+  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/postinst
+#!/bin/sh
+[ -n "$${IPKG_INSTROOT}" ] || /etc/init.d/ipv6-boot start || true
+[ -n "$${IPKG_INSTROOT}" ] || /etc/uci-defaults/10_network-enable-ipv6 || true
+[ -n "$${IPKG_INSTROOT}" ] || rm -f /etc/uci-defaults/10_network-enable-ipv6 || true
+endef
+
+define Package/ipv6-support/install
+	$(INSTALL_DIR) $(1)/etc/uci-defaults
+	$(INSTALL_DIR) $(1)/etc/init.d
+	$(INSTALL_BIN) ./files/network-enable-ipv6.defaults $(1)/etc/uci-defaults/10_network-enable-ipv6
+	$(INSTALL_BIN) ./files/ipv6-boot $(1)/etc/init.d/ipv6-boot
+endef
+
+$(eval $(call BuildPackage,ipv6-support))
diff --git a/package/ipv6-support/files/ipv6-boot b/package/ipv6-support/files/ipv6-boot
new file mode 100755
index 0000000000..a0d3856c03
--- /dev/null
+++ b/package/ipv6-support/files/ipv6-boot
@@ -0,0 +1,15 @@
+#!/bin/sh /etc/rc.common
+START=11
+STOP=97
+
+start() {
+	# early sysctl to avoid networking races
+	if [ -d /proc/sys/net/ipv6/conf ]; then
+		for i in /proc/sys/net/ipv6/conf/*/accept_ra; do
+			echo 0 > $i
+		done
+
+		echo 1 > /proc/sys/net/ipv6/conf/default/forwarding
+		echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
+	fi
+}
diff --git a/package/ipv6-support/files/network-enable-ipv6.defaults b/package/ipv6-support/files/network-enable-ipv6.defaults
new file mode 100755
index 0000000000..7bde74267f
--- /dev/null
+++ b/package/ipv6-support/files/network-enable-ipv6.defaults
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+# Remove conflicting sysctl-handler
+rm -f /etc/hotplug.d/iface/10-sysctl
+
+# Don't override existing settings
+uci get network.globals && exit 0
+
+# Sometimes results are empty, therefore try until it works...          
+local r1 r2 r3
+while [ -z "$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
+
+
+uci -q batch <<-EOF >/dev/null
+	set network.globals=globals
+	set network.globals.ula_prefix=fd$r1:$r2:$r3::/48
+	set network.wan6=interface
+	set network.wan6.proto=dhcpv6
+	set network.wan6.ifname=@wan
+	set network.lan.ip6assign=64
+	set network.wan.ipv6=1
+	commit network
+EOF
-- 
2.30.2