因為太難了...要做個紀錄
以下是我們可以看到clickd中的code
#!/bin/sh # Copyright (c) 2006, Roberto Riggio # # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # - Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # - Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in # the documentation and/or other materials provided with the # distribution. # - Neither the name of the CREATE-NET nor the names of its # contributors may be used to endorse or promote products derived # from this software without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, # PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR # PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF # LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:./ DAEMON=click => 可執行檔 HELPER=click_config =>由click_config產生腳本 NAME=clickd MODE="11g" CHANNEL="2412" DEV="moni0" PROFILE="bulk" LS="fcfs" METRIC="wcett" => 有hop-count與wcett，這是route機制 RC="minstrel" => 有static與minstrel，這是Rate Control機制 CLICK_FILE=/var/run/$NAME.click PID_FILE=/var/run/$NAME.pid LOG_FILE=/var/log/$NAME.log test -x "$(which $DAEMON)" || exit 0 test -x "$(which $HELPER)" || exit 0 case "$1" in start) echo "Starting $NAME" if which wlanconfig > /dev/null 2>&1; then => > /dev/null 2>&1表示說不Print在螢幕上 PHY="wifi0" WLANCONFIG=$(which wlanconfig) [ ! -f "$WLANCONFIG" ] && { echo "Couldn't find wlanconfig"; exit 1; } $WLANCONFIG $DEV destroy 2> /dev/null $WLANCONFIG $DEV create wlandev $PHY wlanmode monitor > /dev/null 2>&1 || { echo "Couldn't create monitor device on $PHY"; exit 1; } echo '803' > /proc/sys/net/$DEV/dev_type /sbin/iwpriv $DEV mode $MODE elif which iw > /dev/null 2>&1; then PHY="phy0" IW=$(which iw) [ ! -f "$IW" ] && { echo "Couldn't find iw"; exit 1; } $IW dev $DEV del > /dev/null 2>&1 $IW phy $PHY interface add $DEV type monitor > /dev/null 2>&1 || { echo "Couldn't create monitor device on $PHY"; exit 1; } else echo "Couldn't find neither iw or wlanconfig"; exit 1 fi /sbin/iwconfig $DEV channel ${CHANNEL}M /sbin/ifconfig $DEV mtu 1900 /sbin/ifconfig $DEV txqueuelen 5 /sbin/ifconfig $DEV up /sbin/modprobe tun > /dev/null 2>&1 =>載入Module (包製多NIC) # extract the bottom three octects to use as IP =>查網卡卡號，可直接設SUFFIX成0.0.0.1 MAC=$(/sbin/ifconfig $DEV 2>&1 | sed -n 's/^.*HWaddr \([0-9A-Za-z\-]*\).*/\1/p' | sed -e 's/\-/:/g' | cut -c1-17) HI=$(echo $MAC | sed -n 's/.*:.*:.*:\([0-9A-Za-z:]*\):.*:.*.*/\1/p') MID=$(echo $MAC | sed -n 's/.*:.*:.*:.*:\([0-9A-Za-z:]*\):.*.*/\1/p') LOW=$(echo $MAC | sed -n 's/.*:.*:.*:.*:.*:\([0-9A-Za-z:]*\).*/\1/p') SUFFIX=$((0x$HI)).$((0x$MID)).$((0x$LOW)) XR_IFNAME="wing-mesh" XR_IP="6.$SUFFIX" XR_NM="255.0.0.0" XR_PERIOD="36000" XR_TAU="360000" $HELPER -p $PROFILE -r $RC -s $LS -l $METRIC -m $MODE -c $CHANNEL -n $DEV -a $MAC -d \ | sed -e "s/__XR_IFNAME__/$XR_IFNAME/g" \ | sed -e "s/__XR_IP__/$XR_IP/g" \ | sed -e "s/__XR_NM__/$XR_NM/g" \ | sed -e "s/__XR_PERIOD__/$XR_PERIOD/g" \ | sed -e "s/__XR_TAU__/$XR_TAU/g" > $CLICK_FILE $DAEMON $CLICK_FILE > $LOG_FILE 2>&1 & sleep 2 if ! pidof $DAEMON > /dev/null 2>&1; then echo "Unable to start click. Check log for more information." exit 1 fi pidof $DAEMON > $PID_FILE ;; stop) echo "Stopping $NAME" if which wlanconfig > /dev/null 2>&1; then WLANCONFIG=$(which wlanconfig) [ ! -f "$WLANCONFIG" ] && { echo "Couldn't find wlanconfig"; exit 1; } $WLANCONFIG $DEV destroy > /dev/null 2>&1 elif which iw > /dev/null 2>&1; then IW=$(which iw) [ ! -f "$IW" ] && { echo "Couldn't find iw"; exit 1; } $IW dev $DEV del > /dev/null 2>&1 else exit 1 fi [ -f $PID_FILE ] && { kill -9 $(cat $PID_FILE) [ -f $PID_FILE ] && rm $PID_FILE } [ -f $CLICK_FILE ] && rm $CLICK_FILE [ -f $LOG_FILE ] && rm $LOG_FILE ;; restart|force-reload) $0 stop sleep 1 $0 start ;; *) echo "Usage: $NAME {start|stop|restart}" >&2 exit 1 ;; esac exit 0
