#!/bin/sh # 6rd.sh - IPv6-in-IPv4 tunnel backend # Copyright (c) 2010-2012 OpenWrt.org [ -n "$INCLUDE_ONLY" ] || { . /lib/functions.sh . /lib/functions/network.sh . ../netifd-proto.sh init_proto "$@" } 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" ] && { proto_notify_error "$cfg" "MISSING_ADDRESS" proto_block_restart "$cfg" return } ( proto_add_host_dependency "$cfg" 0.0.0.0 ) [ -z "$ipaddr" ] && { local wanif if ! network_find_wan wanif || ! network_get_ipaddr ipaddr "$wanif"; then proto_notify_error "$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="${ip6subnet%%::*}::1" # Determine the IPv6 prefix local ip6lanprefix="$ip6subnet/$(($ip6prefixlen + 32 - $ip4prefixlen))" proto_init_update "$link" 1 proto_add_ipv6_address "$ip6addr" "$ip6prefixlen" proto_add_ipv6_prefix "$ip6lanprefix" proto_add_ipv6_route "::" 0 "::$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="$1" } proto_6rd_init_config() { no_device=1 available=1 proto_config_add_int "mtu" proto_config_add_int "ttl" proto_config_add_string "ipaddr" proto_config_add_string "peeraddr" proto_config_add_string "ip6prefix" proto_config_add_string "ip6prefixlen" proto_config_add_string "ip4prefixlen" } [ -n "$INCLUDE_ONLY" ] || { add_protocol 6rd }