#/bin/sh -
#
# Enable ICMP ping-of-death.  Runs on the target node and sets the
# passed parameters into the kernel.
# Invocation: pl-podcntl HOSTIP HOSTMASK HASH

# -----------------------------------------------------------------
# $Header: /shareddata/CVS/planetlab/admin/ipod/pl-podcntl,v 1.2 2003/01/18 01:43:48 radams Exp $
#
# Copyright (c) 2003 Intel Corporation
# All rights reserved.
# This file is distributed under the terms in the attached INTEL_LICENSE
# file.  If you do not find this file, a copy can be obtained by
# writing to Intel Research Berkeley; Attention: Intel License Inquiry;
# 2150 Shattuck Avenue; Berkeley, CA 94704
# -----------------------------------------------------------------

# Modified from origional EMULAB script.  Origional copyright:
# EMULAB-COPYRIGHT
# Copyright (c) 2000-2002 University of Utah and the Flux Group.
# All rights reserved.
#
# Enable ICMP ping-of-death
# Support both the old style (host only) and the new style (host+mask+key)
#

IPODHOSTP=$1
IPODMASKP=$2
IPODHASHP=$3

SYSCTL="/sbin/sysctl"

# Grotesque sed/awk converts IP addrs into an integer for sysctl
if [ x"$IPODHOSTP" != x ]; then
	IPODHOST=`echo $IPODHOSTP | \
		sed -e 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \2 \3 \4/' | \
		awk '{ printf "%d\n", $1*16777216+$2*65536+$3*256+$4 }'`
	IPODMASK=`echo $IPODMASKP | \
		sed -e 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \2 \3 \4/' | \
		awk '{ printf "%d\n", $1*16777216+$2*65536+$3*256+$4 }'`
	IPODKEY=`echo $IPODHASHP | \
		sed -e 's/\(.*\)/\1/'`

	echo "IPODHOST = $IPODHOST"
	echo "IPODMASK = $IPODMASK"
	echo "IPODKEY = $IPODKEY"

	# figure out the version
	version=`$SYSCTL net.ipv4.icmp_ipod_version 2>/dev/null`
	if [ "$version"x = x ]; then
		$SYSCTL net.ipv4.icmp_ipod_enabled >/dev/null 2>&1
		case $? in
		0)
			version=1
			;;
		*)
			version=0
			;;
		esac
	fi

	echo "Version = $version"
	# enable if possible
	case $version in
	0)
		echo "*** WARNING: no IPOD sysctls, not enabled"
		exit 1
		;;
	1)
		$SYSCTL -w net.ipv4.icmp_ipod_host=$IPODHOST >/dev/null
		$SYSCTL -w net.ipv4.icmp_ipod_enabled=1 >/dev/null
		str="Old-style"
		;;
	*)
		$SYSCTL -w net.ipv4.icmp_ipod_host=$IPODHOST >/dev/null
		Success=$?
		$SYSCTL -w net.ipv4.icmp_ipod_mask=$IPODMASK >/dev/null
		$SYSCTL -w net.ipv4.icmp_ipod_key=$IPODKEY >/dev/null
		$SYSCTL -w net.ipv4.icmp_ipod_enabled=1 >/dev/null
		str="Authenticated"
		;;
	esac
	echo Success = $Success
	if [[ $Success -eq 0 ]] ; then
		IPODHOST=`echo $IPODINFO | \
            sed -e 's/.*HOST=\([0-9]*\.[0-9]*\.[0-9]*\.[0-9]*\).*/\1/'`
		IPODMASK=`echo $IPODINFO | \
            sed -e 's/.*MASK=\([0-9]*\.[0-9]*\.[0-9]*\.[0-9]*\).*/\1/'`
        echo "$str IPOD enabled from $IPODHOST/$IPODMASK"
    else
        echo "*** WARNING: could not set IPOD info, not enabled"
    fi
else
	echo "*** WARNING: no IPOD info, not enabled"
fi