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

#!/bin/bash
# Network Interface Configuration System
# Copyright (c) 1996-2001 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/rc.d/init.d/functions

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

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

CONFIG=${1}

[ -z "${CONFIG}" ] && {
    echo $"Usage: ifup <device name>" >&2
    exit 1
}

need_config ${CONFIG}

[ -f "${CONFIG}" ] || {
    echo $"$0: configuration for ${1} not found." >&2
    echo $"Usage: ifup <device name>" >&2
    exit 1
}

source_config

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

if [ "${BOOTPROTO}" = "bootp" -o "${BOOTPROTO}" = "dhcp" ]; then
    echo $"This device does not (yet) support dynamic IP configuration." >&2
    exit 1
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}" != "${HWADDR}" ]; then
        curdev=`ip -o link | awk -F ':' -vIGNORECASE=1 "/$HWADDR/ { print \\$2 }"`
        [ -n "$curdev" ] && rename_device "${REALDEVICE}" "${HWADDR}" "${curdev}" || {
            echo $"Device ${DEVICE} has different MAC address than expected, ignoring."
            exit 1
        }
    fi
fi

# now check the real state
is_available ${REALDEVICE} || {
      if [ "$?" = "1" ] ; then
         echo $"$alias device ${DEVICE} does not seem to be present, delaying initialization."
         exit 1
      else
         exit 0
      fi
}

# slave device?
if [ "${SLAVE}" = yes ]; then
    echo $"This device does not slave operation." >&2
    exit 1
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

# Is there a firewall running, and does it look like one we configured?
FWACTIVE=
if iptables -L -n 2>/dev/null | LC_ALL=C grep -q RH-Lokkit-0-50-INPUT ; then
    FWACTIVE=1
else
    modprobe -r iptable_filter >/dev/null 2>&1
fi

if [ -z "${IPADDR}" ]; then
    # enable device without IP, useful for e.g. PPPoE
    ip link set dev ${REALDEVICE} up

    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

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

# 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 via ${GATEWAY} ${WINDOW:+window $WINDOW} ${SRC} ${GATEWAYDEV:+dev $GATEWAYDEV}
    elif [ "${GATEWAYDEV}" = "${DEVICE}" ]; then
        ip route replace default ${SRC} ${WINDOW:+window $WINDOW} dev ${REALDEVICE}
    fi
fi

# Add Zeroconf route.
if [ -z "${NOZEROCONF}" -a "${ISALIAS}" = "no" ]; 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}
fi

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