#!/bin/bash
# Network Interface Configuration System
# Copyright (c) 1996-2013 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.

. /etc/init.d/functions

cd /etc/sysconfig/network-scripts
. ./network-functions

[ -f ../network ] && . ../network

CONFIG=${1}

source_config

. /etc/sysconfig/network

# Check to make sure the device is actually up
check_device_down ${DEVICE} && exit 0

# If we are a PKey device, we need to munge a few things
if [ "${VLAN}" = yes ]; then
        [ -z "${VLAN_ID}" ] && {
                echo "VLAN=yes requires a VLAN_ID"
                exit 1
        }
        # Normalize our VLAN_ID to have the high bit set
        NEW_VLAN_ID=`printf "0x%04x" $(( 0x8000 | ${VLAN_ID} ))`
        NEW_VLAN_NAME=`printf "%04x" ${NEW_VLAN_ID}`
        [ "${DEVICE}" != "${REALDEVICE}.${NEW_VLAN_NAME}" ] && {
                echo "The high bit of the VLAN_ID must be set and the DEVICE="
                echo "entry in the config file must be the same as the PARENTDEVICE.VLAN_ID"
                echo "Configured DEVICE=$DEVICE"
                echo "Configured PARENTDEVICE=$PARENTDEVICE"
                echo "Calculated REALDEVICE=$REALDEVICE"
                echo "Configured VLAN_ID=$VLAN_ID"
                echo "Calculated VLAN_ID=$NEW_VLAN_ID"
                exit 1
        }
        [ -d "/sys/class/net/${DEVICE}" ] || exit 0
        # When we get to downing the IP address, we need REALDEVICE to
        # point to our PKey VLAN device
        REALDEVICE="${DEVICE}"
fi


if [ "${SLAVE}" != "yes" -o -z "${MASTER}" ]; then
if [ -n "${HWADDR}" -a -z "${MACADDR}" ]; then
    HWADDR=$(echo $HWADDR | tail -c 24)
    FOUNDMACADDR=$(get_hwaddr ${REALDEVICE} | tail -c 24)
    if [ -n "${FOUNDMACADDR}" -a "${FOUNDMACADDR}" != "${HWADDR}" ]; then
        NEWCONFIG=$(get_config_by_hwaddr ${FOUNDMACADDR})
	if [ -n "${NEWCONFIG}" ]; then
	   eval $(LANG=C grep -F "DEVICE=" $NEWCONFIG)
	else
	   net_log $"Device ${DEVICE} has MAC address ${FOUNDMACADDR}, instead of configured address ${HWADDR}. Ignoring."
	   exit 1
	fi
	if [ -n "${NEWCONFIG}" -a "${NEWCONFIG##*/}" != "${CONFIG##*/}" -a "${DEVICE}" = "${REALDEVICE}" ]; then
	   exec /sbin/ifdown ${NEWCONFIG}
	else
	   net_log $"Device ${DEVICE} has MAC address ${FOUNDMACADDR}, instead of configured address ${HWADDR}. Ignoring."
	   exit 1
	fi
    fi
fi
fi

if is_bonding_device ${DEVICE} ; then
    for device in $(LANG=C grep -l "^[[:space:]]*MASTER=\"\?${DEVICE}\"\?\([[:space:]#]\|$\)" /etc/sysconfig/network-scripts/ifcfg-*) ; do
	is_ignored_file "$device" && continue
	/sbin/ifdown ${device##*/}
    done
    for arg in $BONDING_OPTS ; do
	key=${arg%%=*};
	[[ "${key}" != "arp_ip_target" ]] && continue
	value=${arg##*=};
	if [ "${value:0:1}" != "" ]; then
            OLDIFS=$IFS;
            IFS=',';
            for arp_ip in $value; do
		if grep -q $arp_ip /sys/class/net/${DEVICE}/bonding/arp_ip_target; then
                    echo "-$arp_ip" > /sys/class/net/${DEVICE}/bonding/arp_ip_target
		fi
            done
            IFS=$OLDIFS;
	else
	    value=${value#+};
	    if grep -q $value /sys/class/net/${DEVICE}/bonding/arp_ip_target; then
                echo "-$value" > /sys/class/net/${DEVICE}/bonding/arp_ip_target
	    fi
	fi
    done
fi

/etc/sysconfig/network-scripts/ifdown-ipv6 ${CONFIG}

retcode=0
[ -n "$(pidof -x dhclient)" ] && {
   for VER in "" 6 ; do
	if [ -f "/var/run/dhclient$VER-${DEVICE}.pid" ]; then
		dhcpid=$(cat /var/run/dhclient$VER-${DEVICE}.pid)
		generate_lease_file_name $VER
		if [[ "$DHCPRELEASE" = [yY1]* ]];  then
			/sbin/dhclient -r -lf ${LEASEFILE} -pf /var/run/dhclient$VER-${DEVICE}.pid ${DEVICE} >/dev/null 2>&1
			retcode=$?
		else
			kill $dhcpid >/dev/null 2>&1
			retcode=$?
			reason=STOP$VER interface=${DEVICE} /sbin/dhclient-script
		fi
		if [ -f "/var/run/dhclient$VER-${DEVICE}.pid" ]; then
			rm -f /var/run/dhclient$VER-${DEVICE}.pid
			kill $dhcpid >/dev/null 2>&1
		fi	
	fi
    done
}	
# we can't just delete the configured address because that address
# may have been changed in the config file since the device was
# brought up.  Flush all addresses associated with this
# instance instead.
if [ -d "/sys/class/net/${REALDEVICE}" ]; then
	if [ "${REALDEVICE}" = "${DEVICE}" ]; then
		ip addr flush dev ${REALDEVICE} scope global 2>/dev/null
	else
		ip addr flush dev ${REALDEVICE} label ${DEVICE} scope global 2>/dev/null
	fi
	
	if [ "${SLAVE}" = "yes" -a -n "${MASTER}" ]; then
		echo "-${DEVICE}" > /sys/class/net/${MASTER}/bonding/slaves 2>/dev/null
	fi

	if [ "${REALDEVICE}" = "${DEVICE}" ]; then
  		ip link set dev ${DEVICE} down 2>/dev/null
	fi
fi
[ "$retcode" = "0" ] && retcode=$?

# wait up to 5 seconds for device to actually come down...
waited=0
while ! check_device_down ${DEVICE} && [ "$waited" -lt 50 ] ; do
    usleep 10000
    waited=$(($waited+1))
done

if [ "$retcode" = 0 ] ; then
    /etc/sysconfig/network-scripts/ifdown-post $CONFIG
    # do NOT use $? because ifdown should return whether or not
    # the interface went down.
fi

if [ -n "$VLAN" ]; then
    # PKey VLAN
    echo "$NEW_VLAN_ID" > /sys/class/net/${PARENTDEVICE}/delete_child
fi

exit $retcode