#!/bin/bash

# Network Interface Configuration System

# Copyright (c) 1996-2005 Red Hat, Inc. all rights reserved.

#

# This software may be freely redistributed under the terms of the GNU

# public license.

#

# 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., 675 Mass Ave, Cambridge, MA 02139, USA.

. /etc/init.d/functions

cd /etc/sysconfig/network-scripts

. ./network-functions

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

CONFIG=${1}

need_config ${CONFIG}

source_config

# InfiniBand doesn't support dhcp...yet

if [ "${BOOTPROTO}" = "dhcp" ]; then

    DYNCONFIG=true

fi

# load the module associated with that device

# /sbin/modprobe ${REALDEVICE}

is_available ${REALDEVICE}

# remap, if the device is bound with a MAC address and not the right device num

# bail out, if the MAC does not fit

if [ -n "${HWADDR}" ]; then

    FOUNDMACADDR=`get_hwaddr ${REALDEVICE}`

    if [ "${FOUNDMACADDR}" != "${HWADDR}" ]; then

        curdev=`get_device_by_hwaddr ${HWADDR}`

        if [ -n "$curdev" ]; then

	  rename_device "${REALDEVICE}" "${HWADDR}" "${curdev}" || {

	    echo $"Device ${DEVICE} has different MAC address than expected, ignoring."

	    exit 1

	  }

	fi

    fi

fi

# now check the real state

is_available ${REALDEVICE} || {

      if [ -n "$alias" ]; then

         echo $"$alias device ${DEVICE} does not seem to be present, delaying initialization."

      else

         echo $"Device ${DEVICE} does not seem to be present, delaying initialization."

      fi

      exit 1

}

# this isn't the same as the MAC in the configuration filename.  It is

# available as a configuration option in the config file, forcing the kernel

# to think an ethernet card has a different MAC address than it really has.

if [ -n "${MACADDR}" ]; then

   ip link set dev ${DEVICE} address ${MACADDR}

fi

# First, do we even support setting connected mode?

if [ -e /sys/class/net/${DEVICE}/mode ]; then

    # OK, set the mode in all cases, that way it gets reset on a down/up

    # cycle, allowing people to change the mode without rebooting

    if [ "${CONNECTED_MODE}" = yes ]; then

        echo connected > /sys/class/net/${DEVICE}/mode

	# cap the MTU where we should based upon mode

	if [ -n "${MTU}" -a $MTU -gt 65520 ]; then

	    MTU=65520

	fi

    else

        echo datagram > /sys/class/net/${DEVICE}/mode

	# cap the MTU where we should based upon mode

	if [ -n "${MTU}" -a $MTU -gt 2044 ]; then

	    MTU=2044

	fi

    fi

fi

if [ -n "${MTU}" ]; then

    ip link set dev ${DEVICE} mtu ${MTU}

fi

# slave device?

if [ "${SLAVE}" = yes -a "${ISALIAS}" = no -a "${MASTER}" != "" ]; then

    /sbin/ip link set dev ${DEVICE} down

    echo "+${DEVICE}" > /sys/class/net/${MASTER}/bonding/slaves 2>/dev/null

    if [ -n "$ETHTOOL_OPTS" ] ; then

        /sbin/ethtool -s ${REALDEVICE} $ETHTOOL_OPTS

    fi

    exit 0

fi

# Bonding initialization. For DHCP, we need to enslave the devices early,

# so it can actually get an IP.

if [ "$ISALIAS" = no ] && is_bonding_device ${DEVICE} ; then

    /sbin/ip link set dev ${DEVICE} down

    # add the bits to setup driver parameters here

    for arg in $BONDING_OPTS ; do   

        key=${arg%%=*};

        value=${arg##*=};

        if [ "${key}" = "arp_ip_target" ]; then

            OLDIFS=$IFS;

            IFS=',';

            for arp_ip in $value; do

                echo +$arp_ip > /sys/class/net/${DEVICE}/bonding/$key

            done

            IFS=$OLDIFS;

        else

            echo $value > /sys/class/net/${DEVICE}/bonding/$key

        fi

    done

    /sbin/ip link set dev ${DEVICE} up

    [ -n "${LINKDELAY}" ] && /bin/sleep ${LINKDELAY}

    for device in `LANG=C grep -l "^[[:space:]]*MASTER=${DEVICE}" /etc/sysconfig/network-scripts/ifcfg-*` ; do

	    is_ignored_file "$device" && continue

	    /sbin/ifup ${device##*/}

    done

    # add the bits to setup the needed post enslavement parameters

    for arg in $BONDING_OPTS ; do   

        key=${arg%%=*};

        value=${arg##*=};

	if [ "${key}" = "primary" ]; then 

            echo $value > /sys/class/net/${DEVICE}/bonding/$key

	fi

    done

fi

if [ -n "${DYNCONFIG}" -a -x /sbin/dhclient ]; then

    # Remove any temporary references which were previously added to dhclient config

    if [ -w /etc/dhclient-${DEVICE}.conf ] ; then

        LC_ALL=C grep -v "# temporary RHL ifup addition" /etc/dhclient-${DEVICE}.conf > /etc/dhclient-${DEVICE}.conf.ifupnew 2> /dev/null

        cat /etc/dhclient-${DEVICE}.conf.ifupnew > /etc/dhclient-${DEVICE}.conf

        rm -f /etc/dhclient-${DEVICE}.conf.ifupnew

    fi

    if [[ "${PERSISTENT_DHCLIENT}" =  [yY1]* ]]; then

       ONESHOT="";

    else

       ONESHOT="-1";

    fi;

    if [ -n "${DHCP_HOSTNAME}" ]; then

       # Send a host-name to the DHCP server (requ. by some dhcp servers).

       if [ -w /etc/dhclient-${DEVICE}.conf ] ; then

           if ! LC_ALL=C grep "send *host-name *\"${DHCP_HOSTNAME}\"" /etc/dhclient-${DEVICE}.conf > /dev/null 2>&1 ; then

               echo "send host-name \"${DHCP_HOSTNAME}\";  # temporary RHL ifup addition" >> /etc/dhclient-${DEVICE}.conf

           fi

       elif ! [ -e /etc/dhclient-${DEVICE}.conf ] ; then

           echo "send host-name \"${DHCP_HOSTNAME}\";  # temporary RHL ifup addition" >> /etc/dhclient-${DEVICE}.conf

       fi

    fi

    # allow users to use generic '/etc/dhclient.conf' (as documented in manpage!) 

    # if per-device file doesn't exist or is empty

    if [ -s /etc/dhclient-${DEVICE}.conf ]; then

       DHCLIENTCONF="-cf /etc/dhclient-${DEVICE}.conf";

    else

       DHCLIENTCONF='';

    fi;

    # copy any lease obtained by the initrd

    if [ -f /dev/.dhclient-${DEVICE}.leases ] ; then

    	mv -f /dev/.dhclient-${DEVICE}.leases /var/lib/dhclient/dhclient-${DEVICE}.leases

	[ -x /sbin/restorecon ] && restorecon /var/lib/dhclient/dhclient-${DEVICE}.leases > /dev/null 2>&1

    fi

    DHCLIENTARGS="${DHCLIENTARGS} ${ONESHOT} -q ${DHCLIENTCONF} -lf /var/lib/dhclient/dhclient-${DEVICE}.leases -pf /var/run/dhclient-${DEVICE}.pid"

    echo

    echo -n $"Determining IP information for ${DEVICE}..."

    if check_link_down ${DEVICE}; then

	echo $" failed; no link present.  Check cable?"

	ip link set dev ${DEVICE} down >/dev/null 2>&1

	exit 1

    fi

    if [ -n "$ETHTOOL_OPTS" ] ; then

        /sbin/ethtool -s ${REALDEVICE} $ETHTOOL_OPTS

    fi

    if /sbin/dhclient ${DHCLIENTARGS} ${DEVICE} ; then

	echo $" done."

    else

	echo $" failed."

	exit 1

    fi

# end dynamic device configuration

else 

    if [ -z "${IPADDR}" ]; then

         # enable device without IP, useful for e.g. PPPoE

	 ip link set dev ${REALDEVICE} up

	 if [ -n "$ETHTOOL_OPTS" ] ; then

	 	/sbin/ethtool -s ${REALDEVICE} $ETHTOOL_OPTS

	 fi

	 [ -n "${LINKDELAY}" ] && /bin/sleep ${LINKDELAY}

	 if [ "${NETWORKING_IPV6}" = "yes" ]; then

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

	 fi

	 exec /etc/sysconfig/network-scripts/ifup-post ${CONFIG} ${2}

    fi

    expand_config

    [ -n "${ARP}" ] && \

	ip link set dev ${REALDEVICE} $(toggle_value arp $ARP)

    if ! ip link set dev ${REALDEVICE} up ; then

	echo $"Failed to bring up ${DEVICE}."

	exit 1

    fi

    if [ -n "$ETHTOOL_OPTS" ] ; then

        /sbin/ethtool -s ${REALDEVICE} $ETHTOOL_OPTS

    fi

    [ -n "${LINKDELAY}" ] && /bin/sleep ${LINKDELAY}

    if [ "${DEVICE}" = "lo" ]; then

    	SCOPE="scope host"

    else

        SCOPE=${SCOPE:-}

    fi

    if [ -n "$SRCADDR" ]; then

       SRC="src $SRCADDR"

    else

       SRC=

    fi

    if ! LC_ALL=C ip addr ls ${REALDEVICE} | LC_ALL=C grep -q "${IPADDR}/${PREFIX}" ; then

	 if ! arping -q -c 2 -w 3 -D -I ${REALDEVICE} ${IPADDR} ; then

	    echo $"Error, some other host already uses address ${IPADDR}."

	    exit 1

	 fi

	 if ! ip addr add ${IPADDR}/${PREFIX} \

	    brd ${BROADCAST:-+} dev ${REALDEVICE} ${SCOPE} label ${DEVICE}; then

	    echo $"Error adding address ${IPADDR} for ${DEVICE}."

	 fi

    fi

    if [ -n "$SRCADDR" ]; then

           sysctl -w "net.ipv4.conf.${REALDEVICE}.arp_filter=1" >/dev/null 2>&1

    fi

    # update ARP cache of neighboring computers

    arping -q -A -c 1 -I ${REALDEVICE} ${IPADDR}

    ( sleep 2;

      arping -q -U -c 1 -I ${REALDEVICE} ${IPADDR} ) > /dev/null 2>&1 < /dev/null &

    # Set a default route.

    if [ -z "${GATEWAYDEV}" -o "${GATEWAYDEV}" = "${REALDEVICE}" ]; then

	# set up default gateway. replace if one already exists

	if [ -n "${GATEWAY}" -a "`ipcalc --network ${GATEWAY} ${NETMASK} 2>/dev/null`" = "NETWORK=${NETWORK}" ]; then

	    ip route replace default ${METRIC:+metric $METRIC} \

		via ${GATEWAY} ${WINDOW:+window $WINDOW} ${SRC} \

		${GATEWAYDEV:+dev $GATEWAYDEV}

	elif [ "${GATEWAYDEV}" = "${DEVICE}" ]; then

	    ip route replace default ${METRIC:+metric $METRIC} \

		${SRC} ${WINDOW:+window $WINDOW} dev ${REALDEVICE}

	fi

    fi

fi

# Add Zeroconf route.

if [ -z "${NOZEROCONF}" -a "${ISALIAS}" = "no" -a "${REALDEVICE}" != "lo" ]; then

    ip route replace 169.254.0.0/16 dev ${REALDEVICE} 

fi

# IPv6 initialisation?

if [ "${NETWORKING_IPV6}" = "yes" ]; then

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

    if [[ "${DHCPV6C}"  = [Yy1]* ]] && [ -x /sbin/dhcp6c ]; then

	/sbin/dhcp6c ${DEVICE};

        dhcp6_pid=(`/bin/ps -eo 'pid,args' | /bin/grep "dhcp6c ${DEVICE}" | egrep -v grep`);

	echo ${dhcp6_pid[0]} > /var/run/dhcp6c_${DEVICE}.pid

    fi;

fi

exec /etc/sysconfig/network-scripts/ifup-post ${CONFIG} ${2}