From a1af842016c4ad1f570b362b1c7235fbd0abe29f Mon Sep 17 00:00:00 2001
From: Steven Barth <cyrus@openwrt.org>
Date: Mon, 13 May 2013 17:12:39 +0000
Subject: [PATCH] ds-lite: add ds-lite network protocol handler

SVN-Revision: 36628
---
 package/network/ipv6/ds-lite/Makefile        | 42 +++++++++++
 package/network/ipv6/ds-lite/files/dslite.sh | 74 ++++++++++++++++++++
 2 files changed, 116 insertions(+)
 create mode 100644 package/network/ipv6/ds-lite/Makefile
 create mode 100755 package/network/ipv6/ds-lite/files/dslite.sh

diff --git a/package/network/ipv6/ds-lite/Makefile b/package/network/ipv6/ds-lite/Makefile
new file mode 100644
index 0000000000..ecbcf6b398
--- /dev/null
+++ b/package/network/ipv6/ds-lite/Makefile
@@ -0,0 +1,42 @@
+#
+# Copyright (C) 2013 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:=ds-lite
+PKG_VERSION:=1
+PKG_RELEASE:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/ds-lite
+  SECTION:=ipv6
+  CATEGORY:=IPv6
+  DEPENDS:=+kmod-ipv6 +kmod-ip6-tunnel
+  TITLE:=Dual-Stack Lite (DS-Lite) configuration support
+  MAINTAINER:=Steven Barth <steven@midlink.org>
+  PKGARCH:=all
+endef
+
+define Package/ds-lite/description
+Provides support for Dual-Stack Lite in /etc/config/network.
+Refer to http://wiki.openwrt.org/doc/uci/network for
+configuration details.
+endef
+
+define Build/Compile
+endef
+
+define Build/Configure
+endef
+
+define Package/ds-lite/install
+	$(INSTALL_DIR) $(1)/lib/netifd/proto
+	$(INSTALL_BIN) ./files/dslite.sh $(1)/lib/netifd/proto/dslite.sh
+endef
+
+$(eval $(call BuildPackage,ds-lite))
diff --git a/package/network/ipv6/ds-lite/files/dslite.sh b/package/network/ipv6/ds-lite/files/dslite.sh
new file mode 100755
index 0000000000..67887881e1
--- /dev/null
+++ b/package/network/ipv6/ds-lite/files/dslite.sh
@@ -0,0 +1,74 @@
+#!/bin/sh
+# dslite.sh - IPv4-in-IPv6 tunnel backend
+# Copyright (c) 2013 OpenWrt.org
+
+[ -n "$INCLUDE_ONLY" ] || {
+	. /lib/functions.sh
+	. /lib/functions/network.sh
+	. ../netifd-proto.sh
+	init_proto "$@"
+}
+
+proto_dslite_setup() {
+	local cfg="$1"
+	local iface="$2"
+	local link="dslite-$cfg"
+
+	local mtu ttl peeraddr ip6addr tunlink
+	json_get_vars mtu ttl peeraddr ip6addr tunlink
+
+	[ -z "$peeraddr" ] && {
+		proto_notify_error "$cfg" "MISSING_ADDRESS"
+		proto_block_restart "$cfg"
+		return
+	}
+
+	( proto_add_host_dependency "$cfg" "::" "$tunlink" )
+
+	[ -z "$ip6addr" ] && {
+		local wanif="$tunlink"
+		if [ -z "$wanif" ] && ! network_find_wan6 wanif; then
+			proto_notify_error "$cfg" "NO_WAN_LINK"
+			return
+		fi
+
+		if ! network_get_ipaddr6 ip6addr "$wanif"; then
+			proto_notify_error "$cfg" "NO_WAN_LINK"
+			return
+		fi
+	}
+
+	proto_init_update "$link" 1
+	proto_add_ipv4_route "0.0.0.0" 0
+	proto_add_ipv4_address "192.0.0.2" "" "" "192.0.0.1"
+
+	proto_add_tunnel
+	json_add_string mode ipip6
+	json_add_int mtu "${mtu:-1280}"
+	json_add_int ttl "${ttl:-64}"
+	json_add_string local "$ip6addr"
+	json_add_string remote "$peeraddr"
+	[ -n "$tunlink" ] && json_add_string link "$tunlink"
+	proto_close_tunnel
+
+	proto_send_update "$cfg"
+}
+
+proto_dslite_teardown() {
+	local cfg="$1"
+}
+
+proto_dslite_init_config() {
+	no_device=1             
+	available=1
+
+	proto_config_add_string "ip6addr"
+	proto_config_add_string "peeraddr"
+	proto_config_add_string "tunlink"
+	proto_config_add_int "mtu"
+	proto_config_add_int "ttl"
+}
+
+[ -n "$INCLUDE_ONLY" ] || {
+        add_protocol dslite
+}
-- 
2.30.2