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#!/bin/bash# Copyright (C) 1996-2009 Red Hat, Inc. all rights reserved.## This program is free software; you can redistribute it and/or modify# it under the terms of the GNU General Public License, version 2,# as published by the Free Software Foundation.## This program is distributed in the hope that it will be useful,# but WITHOUT ANY WARRANTY; without even the implied warranty of# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the# GNU General Public License for more details.## You should have received a copy of the GNU General Public License# along with this program; if not, write to the Free Software# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA# Thanks to:# - Razvan Corneliu C.R. Vilt <razvan.vilt@linux360.ro># - Aaron Hope <aaron.hope@unh.edu># - Sean Millichamp <sean@enertronllc.com># for providing the scripts this one is based on. /etc/init.d/functionscd /etc/sysconfig/network-scripts. ./network-functionsCONFIG=$1need_config "$CONFIG"source_configif [ "$PEER_OUTER_IPADDR" = "$PEER_INNER_IPADDR" ]; then# Specifying PEER_INNER_IPADDR would automatically add a route to the peer# through the tunnel, redirecting tunnel packets back to the tunnel and# creating a dead loop.unset PEER_INNER_IPADDRficase "$TYPE" inGRE)MODE=gre/sbin/modprobe ip_gre;;IPIP)MODE=ipip/sbin/modprobe ipip;;*)net_log $"Invalid tunnel type $TYPE"exit 1;;esac# Generic tunnel devices are not supported hereif [ "$DEVICE" = gre0 -o "$DEVICE" = tunl0 ]; thennet_log $"Device '$DEVICE' isn't supported as a valid GRE device name."exit 1fi# Create the tunnel# The outer addresses are those of the underlying (public) network./sbin/ip tunnel add "$DEVICE" mode "$MODE" \${MY_OUTER_IPADDR:+local "$MY_OUTER_IPADDR"} \${PEER_OUTER_IPADDR:+remote "$PEER_OUTER_IPADDR"} \${KEY:+key "$KEY"} ${TTL:+ttl "$TTL"}if [ -n "$MTU" ]; then/sbin/ip link set "$DEVICE" mtu "$MTU"fi# The inner address are used mainly for communication between a gateway# and a private network. When the peer is configured with an inner address# contained in the peer's private network or identical to it's public address,# it need not be specified./sbin/ip addr add "$MY_INNER_IPADDR" dev "$DEVICE" \${PEER_INNER_IPADDR:+peer "$PEER_INNER_IPADDR"}/sbin/ip link set dev "$DEVICE" up# IPv6 initialisation?/etc/sysconfig/network-scripts/ifup-ipv6 ${CONFIG}exec /etc/sysconfig/network-scripts/ifup-post "$CONFIG" "$2"