UserDocs/Distro/RedHat: ifup-ath

#!/bin/bash
# This is a modified version of the Red Hat ifup/ifup-eth
# shipped with FC4 for use with Madwifi network devices.
# Modified by Greg Davey
# original copyright follows

# 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.5

. /etc/init.d/functions
cd /etc/sysconfig/network-scripts
. network-functions
[ -f ../network ] && . ../network

CONFIG=${1}
need_config ${CONFIG}
source_config

if [ "${BOOTPROTO}" = "bootp" -o "${BOOTPROTO}" = "dhcp" ]; then
    DYNCONFIG=true
fi

#load device modules
is_available ${REALDEVICE}

if [ -z ${DYNCONFIG} ] ; then
    ifconfig ${DEVICE} ${IPADDR} netmask ${NETMASK} up
else
    ifconfig ${DEVICE} up
fi

echo
#############################################################33

# This is a bit hackish, but should do the job right...
if [ -n "$ESSID" -o -n "$MODE" ] ; then
    NICKNAME=`/bin/hostname`
    iwconfig ${DEVICE} nick "$NICKNAME" >/dev/null 2>&1
fi

if [ -n "$MODE" ] ; then
    iwconfig ${DEVICE} mode $MODE
fi

if [ -n ${WIRELESS_RATE} ] ; then
    iwconfig ${DEVICE} rate ${WIRELESS_RATE}
fi

#    if [ "$ENCRYPTION" != "WPA" -a "$ENCRYPTION" != "WPA2" ] ; then
#This won't work at all with multiple wireless cards needing wpa_supplicant.
#Please hack me.
pkill wpa_supplicant
#    fi

if [ -n "$ENCRYPTION" ] ; then
    if [ "$ENCRYPTION" = "WPA" -o "$ENCRYPTION" = "WPA2" ] ; then
        wpa_passphrase "${ESSID}" "${WPA_PASSPHRASE}" > /etc/wpa_supplicant_${DEVICE}.conf
        chmod 620 /etc/wpa_supplicant_${DEVICE}.conf
    fi

    if [ "$ENCRYPTION" = "WEP" ] ; then
        if [ -n "$KEY" -o -n "$KEY1" -o -n "$KEY2" -o -n "$KEY3" -o -n "$KEY4" ] ; then
            [ -n "$KEY1" ] && iwconfig ${DEVICE} key [1] $KEY1
            [ -n "$KEY2" ] && iwconfig ${DEVICE} key [2] $KEY2
            [ -n "$KEY3" ] && iwconfig ${DEVICE} key [3] $KEY3
            [ -n "$KEY4" ] && iwconfig ${DEVICE} key [4] $KEY4
            if [ -n "$DEFAULTKEY" ] ; then
                iwconfig ${DEVICE} key [${DEFAULTKEY}]
            else
                iwconfig ${DEVICE} key [1]
            fi
            echo "${ENCRYPTION} enabled!"
        fi
        
    fi

    if [ "${ENCRYPTION}" != "WPA" -a "${ENCRYPTION}" != "WPA2" ] ; then
        if [ -n "${SECURITYMODE}" ] ; then
            iwconfig ${DEVICE} enc ${SECURITYMODE}
        fi
    fi

    if [ "$ENCRYPTION" = "NONE" ] ; then
        iwconfig ${DEVICE} key off
    fi
else
    iwconfig ${DEVICE} key off
fi

# More specific parameters passed directly to IWCONFIG
if [ -n "$IWCONFIG" ] ; then
    iwconfig ${DEVICE} $IWCONFIG
fi

if [ -n "$IWPRIV" ] ; then
    iwpriv ${DEVICE} $IWPRIV
fi

# ESSID need to be last : most device re-perform the scanning/discovery
# when this is set, and things like encryption keys are better be
# defined if we want to discover the right set of APs/nodes.
if [ -n "$ESSID" ] ; then
    iwconfig ${DEVICE} essid "$ESSID"
else
    # use any essid
    iwconfig ${DEVICE} essid any
fi

if [ -n ${WIRELESS_CARD_MODE} ] ; then
    iwpriv ${DEVICE} mode ${WIRELESS_CARD_MODE}
fi

if [ -n ${WIRELESS_TURBO_MODE} ] ; then
    iwpriv ${DEVICE} turbo ${WIRELESS_TURBO_MODE}
fi

if [ "$ENCRYPTION" = "WPA" -o "$ENCRYPTION" = "WPA2" ] ; then
    if [ "$ENCRYPTION" = "WPA" ] ; then
        wpa_supplicant -Bw -Dmadwifi -i${DEVICE} -c/etc/wpa_supplicant_${DEVICE}.conf -pkey_mgmt=WPA-PSK -pproto=WPA
    fi

    if [ "$ENCRYPTION" = "WPA2" ] ; then
        wpa_supplicant -Bw -Dmadwifi -i${DEVICE} -c/etc/wpa_supplicant_${DEVICE}.conf -pkey_mgmt=WPA-PSK -pproto=RSN
    fi
    echo "${ENCRYPTION} enabled!"
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-${DEVICE}.conf";
    else
       DHCLIENTCONF='';
    fi;
    DHCLIENTARGS="${DHCLIENTARGS} ${ONESHOT} -q ${DHCLIENTCONF} -lf /var/lib/dhcp/dhclient-${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 $" failed."
        exit 1
    fi
# end dynamic device configuration
else
    if [ -n "${GATEWAY}" ] ; then
        route add default gw ${GATEWAY}
        echo "${DEVICE} gateway installed."
    fi
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}