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Editing File: /etc/sysconfig/network-scripts/ifup-wireless

#!/bin/bash
# Network Interface Configuration System
# Copyright (c) 1996-2009 Red Hat, Inc. all rights reserved.
#
# Based on PCMCIA wireless script by (David Hinds/Jean Tourrilhes)
#
# 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.
#
# Configure wireless network device options.  See iw(8) for more info.
# Valid variables:
#    MODE: Ad-Hoc, Managed, etc.
#    ESSID: Name of the wireless network
#    FREQ: Frequency to operate on.  See CHANNEL
#    KEY: Encryption key for WEP.

# Only meant to be called from ifup.

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

IW=${IW:-iw}

[ "$KEY" ] && KEYS="key d:0:$KEY"

shopt -s nocasematch

case "$MODE" in
managed)
    if [ "$ESSID" ]; then
        $IW dev "$DEVICE" set type managed
        $IW dev "$DEVICE" connect -w "$ESSID" $FREQ $KEYS
    fi
    ;;
ad-hoc)
    if [ -n "$ESSID" -a -n "$FREQ" ]; then
        $IW dev "$DEVICE" set type ibss
        $IW dev "$DEVICE" ibss join "$ESSID" "$FREQ" $KEYS
    fi
    ;;
monitor)
    if [ "$FREQ" ]; then 
        $IW dev "$DEVICE" set type monitor
        $IW dev "$DEVICE" set freq "$FREQ"
    fi
    ;;
esac

if [ -n "$WOWLAN" ] ; then
    PHYDEVICE=$(phy_wireless_device $DEVICE)
    iw phy $PHYDEVICE wowlan enable ${WOWLAN}
fi

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