#!/bin/sh

################################################################################
##                                                                            ##
## Copyright (c) International Business Machines  Corp., 2006                 ##
##                                                                            ##
## 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   ##
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## 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    ##
##                                                                            ##
##                                                                            ##
################################################################################
#
# File:
#   route4-rmmod
#
# Description:
#   Verify the kernel is not crashed when IPv4 route is add then it is deleted
#   by the removing network driver
#
# Setup:
#   See testcases/network/stress/README
#
# Author:
#   Mitsuru Chinen <mitch@jp.ibm.com>
#
# History:
#	Apr 8 2006 - Created (Mitsuru Chinen)
#
#-----------------------------------------------------------------------
# Uncomment line below for debug output.
#trace_logic=${trace_logic:-"set -x"}
$trace_logic

# Make sure the value of LTPROOT
LTPROOT=${LTPROOT:-`(cd ../../../../ ; pwd)`}
export LTPROOT

# Total number of the test case
TST_TOTAL=2
export TST_TOTAL

# Default of the test case ID and the test case count
TCID=route4-rmmod
TST_COUNT=0
export TCID
export TST_COUNT

# Check the environmanet variable
. check_envval || exit $TST_TOTAL

# The number of times where IPv4 route is add/delete
NS_TIMES=${NS_TIMES:-10000}

# The number of the test link where tests run
LINK_NUM=${LINK_NUM:-0}

# Network portion of the IPv4 address
IPV4_NETWORK=${IPV4_NETWORK:-"10.0.0"}

# Netmask of for the tested network
IPV4_NETMASK="255.255.255.0"
IPV4_NETMASK_NUM=24

# Broadcast address of the tested network
IPV4_BROADCAST=${IPV4_NETWORK}.255

# Host portion of the IPv4 address
LHOST_IPV4_HOST=${LHOST_IPV4_HOST:-"2"}	# src
RHOST_IPV4_HOST=${RHOST_IPV4_HOST:-"1"}	# gateway

# The destination network
DST_NETWORK="10.10.10"	# destination network would be 10.10.10.0/24
DST_HOST="5"
DST_PORT="7"


#-----------------------------------------------------------------------
#
# NAME:
#   do_cleanup
#
# DESCRIPTION:
#   Recover the tested interfaces
#
#-----------------------------------------------------------------------
do_cleanup()
{
    # Make sure to load the network driver
    if [ x${lhost_module} != x ]; then
	modprobe $lhost_module
    fi

    # Initialize the interfaces
    initialize_if lhost ${LINK_NUM}
    initialize_if rhost ${LINK_NUM}
}


#-----------------------------------------------------------------------
#
# NAME:
#   do_setup
#
# DESCRIPTION:
#   Make a IPv4 connectivity
#
#-----------------------------------------------------------------------
do_setup()
{
    # Check the local host has ethtool utility
    which ethtool >/dev/null
    if [ $? -ne 0 ]; then
	tst_resm TBROK "This test case requires ethtool utility"
	exit $TST_TOTAL
    fi

    # The module name of the interface at the local host
    lhost_module=

    # Make sure to clean up
    do_cleanup

    # Set IPv4 address to the interfaces of the remote host
    set_ipv4addr rhost ${LINK_NUM} ${IPV4_NETWORK} ${RHOST_IPV4_HOST}
    if [ $? -ne 0 ]; then
	tst_resm TBROK "Failed to add an IPv4 address the remote host"
	exit $TST_TOTAL
    fi
    rhost_ipv4addr="${IPV4_NETWORK}.${RHOST_IPV4_HOST}"

    # Assign IPv4 address to the interface of the local host
    set_ipv4addr lhost ${LINK_NUM} ${IPV4_NETWORK} ${LHOST_IPV4_HOST}
    if [ $? -ne 0 ]; then
	tst_resm TBROK "Failed to assign an IPv4 address at the local host"
	return 1
    fi
    lhost_ipv4addr="${IPV4_NETWORK}.${LHOST_IPV4_HOST}"

    # Get the Interface names
    lhost_ifname=`get_ifname lhost ${LINK_NUM}`
    if [ $? -ne 0 ]; then
	tst_resm TBROK "Failed to get the interface name at the local host"
	exit $TST_TOTAL
    fi

    rhost_ifname=`get_ifname rhost ${LINK_NUM}`
    if [ $? -ne 0 ]; then
	tst_resm TBROK "Failed to get the interface name at the remote host"
	exit $TST_TOTAL
    fi

    # Get the module name of the interface at the local host
    lhost_module=`ethtool -i $lhost_ifname | grep driver | sed "s/driver:[[:blank:]]*//"`

    # Chack the other active interface uses the same driver
    for ifname in `ifconfig | grep ^eth | awk '{ print $1}'`; do
	if [ $lhost_ifname = $ifname ]; then
	    continue
	fi

	module=`ethtool -i $ifname | grep driver | sed "s/driver:[[:blank:]]*//"`
	if [ $lhost_module = $module ]; then
	    tst_resm TBROK "An active interface $ifname uses the same network deriver $module with the test intreface."
	    exit $TST_TOTAL
	fi
    done

    # Set the variables for destination network
    dst_addr=${DST_NETWORK}.${DST_HOST}
    dst_network=${DST_NETWORK}.0
}


#-----------------------------------------------------------------------
#
# FUNCTION:
#   test_body
#
# DESCRIPTION:
#   main code of the test
#
# Arguments:
#   $1: define the test type
#	1 - route command case
#	2 - ip command case
#
#-----------------------------------------------------------------------
test_body()
{
    test_type=$1

    TCID=route4-rmmod0${test_type}
    TST_COUNT=$test_type

    case $test_type in
	1)
	tst_resm TINFO "Verify the kernel is not crashed when IPv4 route is add by route command then it is deleted by removing network driver in $NS_TIMES times"
	;;
	2)
	tst_resm TINFO "Verify the kernel is not crashed when IPv4 route is add by ip command then it is deleted by removing network driver in $NS_TIMES times"
	;;
	*)
	tst_resm TBROK "unspecified case"
	return 1
	;;
    esac

    # Start the loop
    cnt=0
    while [ $cnt -lt $NS_TIMES ]; do
	# Check the connectivity to the gateway
	check_icmpv4_connectivity $lhost_ifname $rhost_ipv4addr
	if [ $? -ne 0 ]; then
	    tst_resm TBROK "Test Link $LINK_NUM is somthing wrong."
	    return 1
	fi

	# Add the route
	case $test_type in
	    1)
	    route add -net $dst_network netmask 255.255.255.0 gw $rhost_ipv4addr dev $lhost_ifname
	    ;;
	    2)
	    ip route add ${dst_network}/24 via $rhost_ipv4addr dev $lhost_ifname
	    ;;
	esac
	if [ $? -ne 0 ]; then
	    tst_resm TFAIL "Failed to add the route to ${dst_network}/24"
	    return 1
	fi

	# Load the route with UDP datagram
	ns-udpsender -f 4 -D $dst_addr -p $DST_PORT -o -s 1472
	if [ $? -ne 0 ]; then
	    tst_resm TFAIL "Failed to run a UDP datagram sender"
	    return 1
	fi

	# Remove and reload the network driver
	rmmod $lhost_module && modprobe $lhost_module
	if [ $? -ne 0 ]; then
	    tst_resm TFAIL "Failed to unload/reload the network driver"
	    return 1
	fi

	# Make sure to assing the IPv4 address
	set_ipv4addr lhost ${LINK_NUM} ${IPV4_NETWORK} ${LHOST_IPV4_HOST} >/dev/null 2>&1

	cnt=`expr $cnt + 1`
    done

    tst_resm TPASS "Test is finished correctly."
    return 0
}


#-----------------------------------------------------------------------
#
# Main
#
# Exit Value:
#   The number of the failure
#
#-----------------------------------------------------------------------

RC=0
do_setup
test_body 1 || RC=`expr $RC + 1`      # Case of route command
test_body 2 || RC=`expr $RC + 1`      # Case of ip command
do_cleanup

exit $RC