source: projects/initscripts/tags/initscripts-8.91.0/sysconfig/network-scripts/ifup-eth @ 2576

#!/bin/bash
# Network Interface Configuration System
# Copyright (c) 1996-2005 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA

. /etc/init.d/functions

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

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

CONFIG=${1}

need_config ${CONFIG}

source_config

# Old BOOTP variable
if [ "${BOOTP}" = "yes" ]; then
    BOOTPROTO=bootp
fi

if [ "${BOOTPROTO}" = "bootp" -o "${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}" != "${HWADDR}" -a "${FOUNDMACADDR}" != "${MACADDR}" ]; then
            echo $"Device ${DEVICE} has different MAC address than expected, ignoring."
            exit 1
    fi
fi

if [ "${TYPE}" = "Bridge" ]; then
      if [ ! -x /usr/sbin/brctl ]; then
          echo $"Bridge support not available: brctl not found"
          exit 1
      fi
      if [ ! -d /sys/class/net/${DEVICE}/bridge ]; then
                /usr/sbin/brctl addbr ${DEVICE} || exit 1
      fi
      [ -n "${DELAY}" ] && /usr/sbin/brctl setfd ${DEVICE} ${DELAY}
      [ -n "${GCINT}" ] && /usr/sbin/brctl setgcint ${DEVICE} ${GCINT}
      [ -n "${STP}" ] && /usr/sbin/brctl stp ${DEVICE} ${STP}
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
}

# is the device wireless? If so, configure wireless device specifics
is_wireless_device ${DEVICE} && . /etc/sysconfig/network-scripts/ifup-wireless

if [ -n "${BRIDGE}" -a -x /usr/sbin/brctl ]; then
      if [ ! -d /sys/class/net/${BRIDGE}/bridge ]; then
          /usr/sbin/brctl addbr ${BRIDGE} 2>/dev/null
      fi
      /sbin/ip addr flush dev ${DEVICE} 2>/dev/null
      /sbin/ip link set dev ${DEVICE} up
      if [ -n "$ETHTOOL_OPTS" ] ; then
        /sbin/ethtool -s ${REALDEVICE} $ETHTOOL_OPTS
      fi
      [ -n "${LINKDELAY}" ] && /bin/sleep ${LINKDELAY}
      /usr/sbin/brctl addif ${BRIDGE} ${DEVICE}
      # Upon adding a device to a bridge, 
      # it's necessary to make radvd reload its config
      [ -r /var/run/radvd/radvd.pid ] && kill -HUP `cat /var/run/radvd/radvd.pid`
      exit 0
fi 

# 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 ${MACADDR}
fi
if [ -n "${MTU}" ]; then
   ip link set dev ${DEVICE} mtu ${MTU}
fi

# slave device?
if [ "${SLAVE}" = yes -a "${ISALIAS}" = no -a "${MASTER}" != "" ]; then
    grep -wq "${DEVICE}" /sys/class/net/${MASTER}/bonding/slaves || {
        /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 ${DEVICE}..."
    if [[ "${PERSISTENT_DHCLIENT}" !=  [yY1]* ]] && 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}

         /etc/sysconfig/network-scripts/ifup-ipv6 ${CONFIG}
         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 [ "${REALDEVICE}" != "lo" ]; then
    if ! LC_ALL=C ip addr ls ${REALDEVICE} | LC_ALL=C grep -q "${IPADDR}/${PREFIX}" ; then
         if ! /sbin/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
    /sbin/arping -q -A -c 1 -I ${REALDEVICE} ${IPADDR}
    ( sleep 2;
      /sbin/arping -q -U -c 1 -I ${REALDEVICE} ${IPADDR} ) > /dev/null 2>&1 < /dev/null &
    fi

    # 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 add 169.254.0.0/16 dev ${REALDEVICE} metric $((1000 + $(cat /sys/class/net/${REALDEVICE}/ifindex))) scope link
fi

# IPv6 initialisation?
/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

if [ "${IPX}" = yes ]; then
       /etc/sysconfig/network-scripts/ifup-ipx ${DEVICE}
fi

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