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-rw-r--r--package/6rd/files/6rd.sh83
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diff --git a/package/6rd/files/6rd.sh b/package/6rd/files/6rd.sh
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+#!/bin/sh
+# 6rd.sh - IPv6-in-IPv4 tunnel backend
+# Copyright (c) 2010-2012 OpenWrt.org
+
+[ -n "$INCLUDE_ONLY" ] || {
+ . /lib/functions.sh
+ . /lib/functions/network.sh
+ . ../netifd-proto.sh
+ init_proto "$@"
+}
+
+tun_error() {
+ local cfg="$1"; shift;
+
+ [ -n "$1" ] && proto_notify_error "$cfg" "$@"
+ proto_block_restart "$cfg"
+}
+
+proto_6rd_setup() {
+ local cfg="$1"
+ local iface="$2"
+ local link="6rd-$cfg"
+
+ local mtu ttl ipaddr peeraddr ip6prefix ip6prefixlen ip4prefixlen
+ json_get_vars mtu ttl ipaddr peeraddr ip6prefix ip6prefixlen ip4prefixlen
+
+ [ -z "$ip6prefix" -o -z "$peeraddr" ] && {
+ tun_error "$cfg" "MISSING_ADDRESS"
+ return
+ }
+
+ [ -z "$ipaddr" ] && {
+ local wanif
+ if ! network_find_wan wanif || ! network_get_ipaddr ipaddr "$wanif"; then
+ tun_error "$cfg" "NO_WAN_LINK"
+ return
+ fi
+ }
+
+ # Determine the relay prefix.
+ local ip4prefixlen="${ip4prefixlen:-0}"
+ local ip4prefix=$(ipcalc.sh "$ipaddr/$ip4prefixlen" | grep NETWORK)
+ ip4prefix="${ip4prefix#NETWORK=}"
+
+ # Determine our IPv6 address.
+ local ip6subnet=$(6rdcalc "$ip6prefix/$ip6prefixlen" "$ipaddr/$ip4prefixlen")
+ local ip6addr="${ip6subnet%%::*}::1"
+
+ proto_init_update "$link" 1
+ proto_add_ipv6_address "$ip6addr" "$ip6prefixlen"
+ proto_add_ipv6_route "::" 0 "::$peeraddr"
+
+ proto_add_tunnel
+ json_add_string mode sit
+ json_add_int mtu "${mtu:-1280}"
+ json_add_int ttl "${ttl:-64}"
+ json_add_string local "$ipaddr"
+ json_add_string 6rd-prefix "$ip6prefix/$ip6prefixlen"
+ json_add_string 6rd-relay-prefix "$ip4prefix/$ip4prefixlen"
+ proto_close_tunnel
+
+ proto_send_update "$cfg"
+}
+
+proto_6rd_teardown() {
+ local cfg="$1"
+}
+
+proto_6rd_init_config() {
+ no_device=1
+ available=1
+
+ proto_config_add_int "mtu"
+ proto_config_add_int "ttl"
+ proto_config_add_string "peeraddr"
+ proto_config_add_string "ip6prefix"
+ proto_config_add_string "ip6prefixlen"
+ proto_config_add_string "ip4prefixlen"
+}
+
+[ -n "$INCLUDE_ONLY" ] || {
+ add_protocol 6rd
+}