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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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/functions
cd /etc/sysconfig/network-scripts
. ./network-functions
CONFIG=$1
need_config "$CONFIG"
source_config
if [ "$PEER_OUTER_IPADDR" = "$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_IPADDR
fi
case "$TYPE" in
GRE)
MODE=gre
proto=-4
/sbin/modprobe ip_gre
;;
GRE6)
MODE=ip6gre
proto=-6
/sbin/modprobe ip6_gre
;;
IPIP)
MODE=ipip
proto=-4
/sbin/modprobe ipip
;;
IPIP6|EXTERNAL)
MODE=ipip6
proto=-6
/sbin/modprobe ip6_tunnel
;;
*)
net_log $"Invalid tunnel type $TYPE"
exit 1
;;
esac
# Generic tunnel devices are not supported here
if [ "$DEVICE" = gre0 -o "$DEVICE" = tunl0 -o "$DEVICE" = ip6tnl0 ]; then
net_log $"Device '$DEVICE' isn't supported as a valid GRE device name."
exit 1
fi
# Create the tunnel
# The outer addresses are those of the underlying (public) network.
if [ "$TYPE" = 'EXTERNAL' ]; then
/sbin/ip link add "$DEVICE" type ip6tnl external
else
/sbin/ip $proto tunnel add "$DEVICE" mode "$MODE" \
${MY_OUTER_IPADDR:+local "$MY_OUTER_IPADDR"} \
${PEER_OUTER_IPADDR:+remote "$PEER_OUTER_IPADDR"} \
${KEY:+key "$KEY"} ${TTL:+ttl "$TTL"}
fi
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"}
set_link_up "${DEVICE}"
# IPv6 initialisation?
/etc/sysconfig/network-scripts/ifup-ipv6 ${CONFIG}
exec /etc/sysconfig/network-scripts/ifup-post "$CONFIG" "$2"
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