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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML>
<HEAD>
 <META NAME="GENERATOR" CONTENT="SGML-Tools 1.0.9">
 <TITLE>Dial-On-Demand mini-HOWTO: ¥À¥¤¥¢¥ë¥ª¥ó¥Ç¥Þ¥ó¥É(Dial-on-Demand)</TITLE>
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 <LINK HREF="Dial-On-Demand-6.html" REL=previous>
 <LINK HREF="Dial-On-Demand.html#toc7" REL=contents>
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<HR>
<H2><A NAME="s7">7. ¥À¥¤¥¢¥ë¥ª¥ó¥Ç¥Þ¥ó¥É(Dial-on-Demand)</A></H2>

<P>Kerneld¤ÏPPP¤È¤¤¤Ã¤¿¥â¥¸¥å¡¼¥ë¤òɬÍפ˱þ¤¸¤Æ¥í¡¼¥É¤·¤Þ¤¹¡£kerneld-HOWTO
¤Ë½ñ¤«¤ì¤Æ¤¤¤ëÄɲõ¡Ç½¤Ï¡¤ÆÃÄê¤Î¥ë¡¼¥È¤¬¼º¤ï¤ì¤¿¤é¥¹¥¯¥ê¥×¥È¤ò¸Æ¤Ó½Ð¤¹¤È¤¤¤¦
µ¡Ç½¤¬¤¢¤ë¤È¤¤¤¦¤â¤Î¤Ç¤¹¡£Kerneld¤Ï¥·¥§¥ë¥¹¥¯¥ê¥×¥È<CODE>/sbin/request-route</CODE>¤òõ¤·¤Þ¤¹¡£°Ê²¼¤Î¥¹¥¯¥ê¥×¥È¤Ï<CODE>modules-2.0.0.tar.gz</CODE>¤Ë¤¢¤Ã¤¿
¥¹¥¯¥ê¥×¥È¤Î¥³¥Ô¡¼¤Ç¤¹¡£
<P>
<P>/sbin/request-route:
<HR>
<PRE>
#!/bin/sh
LOCK=/var/run/request-route.pid
export PATH=/usr/sbin:$PATH     # for ppp-2.2*

# This script will be called from kerneld with the requested route as $1
# $1¤È¤·¤ÆÍ׵ᤵ¤ì¤ë¥ë¡¼¥È¤Ç¡¢¤³¤Î¥¹¥¯¥ê¥×¥È¤¬kerneld¤«¤é¸Æ¤Ó½Ð¤µ¤ì¤Þ¤¹¡£

chatfile=/etc/ppp/$1

# If no chatscript exists use a default value (symlink to preferred script):
# chat¥¹¥¯¥ê¥×¥È¤¬¤Ê¤±¤ì¤Ð¥Ç¥Õ¥©¥ë¥ÈÃͤò»È¤¤¤Þ¤¹
# (»²¾È¤µ¤ì¤ë¥¹¥¯¥ê¥×¥È¤Ø¤Î¥·¥ó¥Ü¥ê¥Ã¥¯¥ê¥ó¥¯)¡§

[ ! -f $chatfile ] &amp;&amp; chatfile=/etc/ppp/default

# Check if we're already running:
# ¼Â¹Ô¤µ¤ì¤Æ¤¤¤ë¤«¤É¤¦¤«¥Á¥§¥Ã¥¯¤¹¤ë¡§
if [ ! -f $LOCK ] ; then
        pppd connect "chat -f $chatfile" &amp;

        # Timer to be killed by ip-up, tunable! Check kerneld delay as well
        # ip-up¤Ë¤è¤Ã¤Ækill¤µ¤ì¤ë¥¿¥¤¥Þ¡£Êѹ¹¤Ç¤­¤Þ¤¹¡ªkerneld¤â¥Á¥§¥Ã¥¯¡£
        sleep 60 &amp;
        sleepid=$!
        echo $sleepid > $LOCK
        wait $sleepid
        rm -f $LOCK
        exit 0
fi
exit 1
</PRE>
<HR>

Kerneld¤Ï°ú¿ô¤È¤·¤Æ̵¤¯¤Ê¤Ã¤¿¥ë¡¼¥È¤ò»È¤Ã¤¿¤³¤Î¥¹¥¯¥ê¥×¥È¤ò¼Â¹Ô¤·¤Þ¤¹¡£
<PRE>
/sbin/request-route x.x.x.x
</PRE>

¥¹¥¯¥ê¥×¥È¤Ï'request-route'-Í×µá(instances)¤Î½ÅÊ£¤òËɤ°¤¿¤á¤Ë¥í¥Ã¥¯¥Õ¥¡¥¤¥ë
(<CODE>lock-file</CODE>)¤ò»È¤¤¤Þ¤¹(<EM>ÌõÃí¡§</EM>¥í¥Ã¥¯¥Õ¥¡¥¤¥ë¤¬¤¢¤ë¥Ç¥Ð¥¤¥¹¤Ï¾¤«¤é
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<P>
<P>°Û¤Ê¤ë¥ê¥ó¥¯ÍѤΥÁ¥ã¥Ã¥È¥¹¥¯¥ê¥×¥È(chat-scripts)¤òÊ£¿ô¤Ä¤¯¤ë¤«
¥Ç¥Õ¥©¥ë¥È¤Î¥Á¥ã¥Ã¥È¥¹¥¯¥ê¥×¥È¤ÇISP(¥×¥í¥Ð¥¤¥À)¤ËÀܳ¤¹¤ë¤è¤¦¤Ë¤·¤Þ¤¹¡£
<P>¥ê¥ó¥¯¤¬³ÎΩ¤µ¤ì¤¿¤épppd¤Ï<CODE>/etc/ppp/ip-up</CODE>¥¹¥¯¥ê¥×¥È¤ò¼Â¹Ô¤·¤Þ¤¹¡£
¤³¤ì¤Ï¥í¥Ã¥¯¥Õ¥¡¥¤¥ë¤òºï½ü¤¹¤ë¤â¤Î¤Ç¤¹¡£sendmail¤Î¥­¥å¡¼¼Â¹Ô(queue-run)¤Î¤è¤¦
¤Ë¡¢¥ê¥ó¥¯¤¬³ÎΩ¤µ¤ì¤ë»þ¤Ï¤¤¤Ä¤Ç¤â¼Â¹Ô¤·¤¿¤¤¥³¥Þ¥ó¥É¤òÄɲä·¤Þ¤¹¡£
<HR>
<PRE>
#!/bin/ash
LOCK=/var/run/request-route.pid
[ -f $LOCK ] &amp;&amp; kill `cat $LOCK`

# Execute these commands after connecting:
# Àܳ¸å¼Â¹Ô¤¹¤ë¥³¥Þ¥ó¥É¡§
#/usr/sbin/sendmail -q
</PRE>
<HR>

'idle-disconnect'¥ª¥×¥·¥ç¥ó¤Ï¼«Æ°Åª¤Ë¥¢¥¤¥É¥ë¥ê¥ó¥¯¤òÀÚÃǤ·¤Þ¤¹¡£Ä¾ÀÜ
PPP¤òÀÚÃǤ¹¤ë¤È¤­¤Ï'ppp-off'¥¹¥¯¥ê¥×¥È¤ò¼Â¹Ô¤·¤Þ¤¹¡£
<P>/usr/sbin/ppp-off:
<HR>
<PRE>
#!/bin/sh
LOCK=/var/run/request-route.pid
DEVICE=ppp0

rm -f $LOCK
#
# If the ppp0 pid file is present then the program is running. Stop it.
# ppp0 PID¥Õ¥¡¥¤¥ë¤¬¤¢¤ì¤Ðkill¤¹¤ë¡£
if [ -r /var/run/$DEVICE.pid ]; then
        kill -INT `cat /var/run/$DEVICE.pid`
#
# If unsuccessful, ensure that the pid file is removed.
# ÉÔÀ®¸ù¤Ê¤é¡¢PID¥Õ¥¡¥¤¥ë¤¬ºï½ü¤µ¤ì¤Æ¤¤¤ë¤³¤È¤ò³Îǧ¡£
        if [ ! "$?" = "0" ]; then
                echo "removing stale $DEVICE pid file."
                rm -f /var/run/$DEVICE.pid
                exit 1
        fi
#
# Success. Terminate with proper status.
# À®¸ù¡£Å¬Åö¤Ê¾õÂ֤ǽª¤ê¤Þ¤·¤¿¡£
        echo "$DEVICE link terminated"
        exit 0
fi
#
# The link is not active
# ¥ê¥ó¥¯¤¬¥¢¥¯¥Æ¥£¥Ö¤Ç¤Ï¤Ê¤¤¡£
echo "$DEVICE link is not active"

exit 1
</PRE>
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