1 files changed, 98 insertions, 0 deletions
diff --git a/package/network/ipv6/6to4/files/6to4.sh b/package/network/ipv6/6to4/files/6to4.sh
new file mode 100755
index 0000000..a5d0567
--- /dev/null
+++ b/package/network/ipv6/6to4/files/6to4.sh
@@ -0,0 +1,98 @@
+#!/bin/sh
+# 6to4.sh - IPv6-in-IPv4 tunnel backend
+# Copyright (c) 2010-2012 OpenWrt.org
+
+[ -n "$INCLUDE_ONLY" ] || {
+	. /lib/functions.sh
+	. /lib/functions/network.sh
+	. ../netifd-proto.sh
+	init_proto "$@"
+}
+
+find_6to4_prefix() {
+	local ip4="$1"
+	local oIFS="$IFS"; IFS="."; set -- $ip4; IFS="$oIFS"
+
+	printf "2002:%02x%02x:%02x%02x\n" $1 $2 $3 $4
+}
+
+test_6to4_rfc1918()
+{
+	local oIFS="$IFS"; IFS="."; set -- $1; IFS="$oIFS"
+	[ $1 -eq  10 ] && return 0
+	[ $1 -eq 192 ] && [ $2 -eq 168 ] && return 0
+	[ $1 -eq 172 ] && [ $2 -ge  16 ] && [ $2 -le  31 ] && return 0
+
+	# RFC 6598
+	[ $1 -eq 100 ] && [ $2 -ge  64 ] && [ $2 -le 127 ] && return 0
+
+	return 1
+}
+
+proto_6to4_setup() {
+	local cfg="$1"
+	local iface="$2"
+	local link="6to4-$cfg"
+
+	local mtu ttl tos ipaddr
+	json_get_vars mtu ttl tos ipaddr
+
+	( proto_add_host_dependency "$cfg" 0.0.0.0 )
+
+	local wanif
+	if ! network_find_wan wanif; then
+		proto_notify_error "$cfg" "NO_WAN_LINK"
+		return
+	fi
+
+	[ -z "$ipaddr" ] && {
+		if ! network_get_ipaddr ipaddr "$wanif"; then
+			proto_notify_error "$cfg" "NO_WAN_ADDRESS"
+			return
+		fi
+	}
+
+	test_6to4_rfc1918 "$ipaddr" && {
+		proto_notify_error "$cfg" "INVALID_LOCAL_ADDRESS"
+		return
+	}
+
+	# find our local prefix
+	local prefix6=$(find_6to4_prefix "$ipaddr")
+	local local6="$prefix6::1"
+
+	proto_init_update "$link" 1
+	proto_add_ipv6_address "$local6" 16
+	proto_add_ipv6_prefix "$prefix6::/48"
+
+	proto_add_ipv6_route "::" 0 "::192.88.99.1" "" "" "$local6/16"
+	proto_add_ipv6_route "::" 0 "::192.88.99.1" "" "" "$prefix6::/48"
+
+	proto_add_tunnel
+	json_add_string mode sit
+	json_add_int mtu "${mtu:-1280}"
+	json_add_int ttl "${ttl:-64}"
+	[ -n "$tos" ] && json_add_string tos "$tos"
+	json_add_string local "$ipaddr"
+	proto_close_tunnel
+
+	proto_send_update "$cfg"
+}
+
+proto_6to4_teardown() {
+	local cfg="$1"
+}
+
+proto_6to4_init_config() {
+	no_device=1
+	available=1
+
+	proto_config_add_string "ipaddr"
+	proto_config_add_int "mtu"
+	proto_config_add_int "ttl"
+	proto_config_add_string "tos"
+}
+
+[ -n "$INCLUDE_ONLY" ] || {
+	add_protocol 6to4
+}