openwrtv4/package/network/ipv6/6rd/files/6rd.sh
Steven Barth c4e09ccb05 6rd: Select first IPv4 address from configured tunlink interface as local tunnel address
Gives the user the control to select the correct WAN IPv4 address to be used by the 6rd tunnel when mutiple WAN interfaces are configured

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

SVN-Revision: 40566
2014-04-24 09:11:44 +00:00

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#!/bin/sh
# 6rd.sh - IPv6-in-IPv4 tunnel backend
# Copyright (c) 2010-2012 OpenWrt.org
[ -n "$INCLUDE_ONLY" ] || {
. /lib/functions.sh
. /lib/functions/network.sh
. ../netifd-proto.sh
init_proto "$@"
}
proto_6rd_setup() {
local cfg="$1"
local iface="$2"
local link="6rd-$cfg"
local mtu df ttl ipaddr peeraddr ip6prefix ip6prefixlen ip4prefixlen tunlink sourcerouting zone
json_get_vars mtu df ttl ipaddr peeraddr ip6prefix ip6prefixlen ip4prefixlen tunlink sourcerouting zone
[ -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="$tunlink"
if [ -z $wanif ] && ! network_find_wan wanif; then
proto_notify_error "$cfg" "NO_WAN_LINK"
return
fi
if ! 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 "$ip6lanprefix"
if [ "$sourcerouting" != "0" ]; then
proto_add_ipv6_route "::" 0 "::$peeraddr" 4096 "" "::/128"
proto_add_ipv6_route "::" 0 "::$peeraddr" 4096 "" "$ip6addr/$ip6prefixlen"
proto_add_ipv6_route "::" 0 "::$peeraddr" 4096 "" "$ip6lanprefix"
else
proto_add_ipv6_route "::" 0 "::$peeraddr" 4096
fi
proto_add_tunnel
json_add_string mode sit
json_add_int mtu "${mtu:-1280}"
json_add_boolean df "${df:-1}"
json_add_int ttl "${ttl:-64}"
json_add_string local "$ipaddr"
json_add_string 6rd-prefix "$ip6prefix/$ip6prefixlen"
json_add_string 6rd-relay-prefix "$ip4prefix/$ip4prefixlen"
[ -n "$tunlink" ] && json_add_string link "$tunlink"
proto_close_tunnel
proto_add_data
[ -n "$zone" ] && json_add_string zone "$zone"
proto_close_data
proto_send_update "$cfg"
}
proto_6rd_teardown() {
local cfg="$1"
}
proto_6rd_init_config() {
no_device=1
available=1
proto_config_add_int "mtu"
proto_config_add_boolean "df"
proto_config_add_int "ttl"
proto_config_add_string "ipaddr"
proto_config_add_string "peeraddr"
proto_config_add_string "ip6prefix"
proto_config_add_string "ip6prefixlen"
proto_config_add_string "ip4prefixlen"
proto_config_add_string "tunlink"
proto_config_add_boolean "sourcerouting"
proto_config_add_string "zone"
}
[ -n "$INCLUDE_ONLY" ] || {
add_protocol 6rd
}