#!/bin/bash
#  Copyright (C) 2000-2007 SWsoft. 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 as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  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
#
#
# This script configure IP alias(es) inside Magellan like VE.
#
# Parameters are passed in environment variables.
# Required parameters:
#   IP_ADDR       - IP address(es) to add
#                   (several addresses should be divided by space)
# Optional parameters:
#   VE_STATE      - state of VE; could be one of:
#                     starting | stopping | running | stopped
#   IPDELALL	  - delete all old interfaces
#

VENET_DEV=venet0
IFCFG_DIR=/etc/conf.d
IFCFG=${IFCFG_DIR}/net.${VENET_DEV}
ROUTESCFG=${IFCFG_DIR}/net.routes
SCRIPT=/etc/runlevels/default/net.${VENET_DEV}
HOSTFILE=/etc/hosts

function setup_network()
{
	cat > ${IFCFG} << EOF
ONBOOT=yes
NETWORKING=static
IP=127.0.0.1
NETMASK=255.255.255.255
BROADCAST=0.0.0.0
EOF

	# setup routes
	echo "-net ${FAKEGATEWAY} netmask 255.255.255.255 dev ${VENET_DEV}" > ${ROUTESCFG}
	echo "default gw ${FAKEGATEWAY}" >> ${ROUTESCFG}

	# Set up /etc/hosts
	if [ ! -f ${HOSTFILE} ]; then
		echo "127.0.0.1 localhost.localdomain localhost" > $HOSTFILE
	fi
}

function get_all_aliasid()
{
	IFNUM=-1
	IFNUMLIST=$(for i in $(find ${IFCFG_DIR} -name net.${VENET_DEV}:*); do echo $i | sed "s/.*${VENET_DEV}://"; done)
}

function get_free_aliasid()
{
	local found=

	[ -z "${IFNUMLIST}" ] && get_all_aliasid
	while test -z ${found}; do
                let IFNUM=IFNUM+1
		echo "${IFNUMLIST}" | grep -q -E "${IFNUM}" 2>/dev/null || found=1
	done
}

function create_config()
{
	local ip=$1
	local ifnum=$2

	echo -e "# auto-generated configuration for ${VENET_DEV}:${ifnum}
ONBOOT=yes
NETWORKING=static
IP=${ip}
NETMASK=255.255.255.255
BROADCAST=0.0.0.0
" > ${IFCFG}:${ifnum}
}


function add_ip()
{
	local ip
	local new_ips

	# In case we are starting VE
	if [ "x${VE_STATE}" = "xstarting" ]; then
		setup_network
	fi

	if [ "x${IPDELALL}" = "xyes" ]; then
		rm -f ${IFCFG}
		rm -f ${IFCFG}:[0-9]*
	fi

	for ip in ${IP_ADDR}; do
		found=
		if grep -e "\\<${ip}\\>" >/dev/null 2>&1 ${IFCFG}:*; then
			continue
		fi
		get_free_aliasid
		create_config ${ip} ${IFNUM}
	done

	if [ "x${VE_STATE}" = "xrunning" ]; then
		# synchronyze config files & interfaces
		/etc/init.d/network restart 2>/dev/null 1>/dev/null
	fi
}

add_ip
exit 0
# end of script