linux下pppoe脚本分析！
pppoe服务相关的命令包括：
- adsl-start。该脚本主要功能是pppoe服务启动脚本。
- adsl-stop。该脚本主要功能是pppoe服务停止脚本，并恢复默认路由。
- adsl-connect。该脚本主要功能是和pppoe协议执行脚本。
- adsl-status。该脚本主要功能是查看pppoe状态。
pppoe服务相关的文件包括：
- chap-secrets。chap认证的用户名和密码。
- pap-secrets。pap认证的用户名和密码。
- pppoe.conf。端口配置信息。
另外，pppoe不会自动配置默认路由，所以需要修改脚本。
最简单的修改方法就是pppoe启动前，先保存原来的默认路由，pppoe停止后，回复原来的默认路由。
或者，pppoe启动时，根据端口名称来配置默认路由，pppoe停止后，再取消启动时配置的默认路由。
默认情况下，使用/etc/ppp/pppoe.conf配置文件：
开启pppoe服务的命令：adsl-start 。
关闭pppoe服务的命令：adsl-stop。
若使用其他配置文件，例如/etc/ppp/pppoe-eth0.conf ，则
adsl-start /etc/ppp/pppoe-eth0.conf
adsl-stop /etc/ppp/pppoe-eth0.conf
下面分析用到的脚本。
adsl-start脚本：
#! /bin/bash
# Generated automatically from adsl-start.in by configure.
#***********************************************************************
#
# adsl-start
#
# Shell script to bring up an ADSL connection
#
# Copyright (C) 2000 Roaring Penguin Software Inc.
#
# $Id: adsl-start.in,v 1.7 2001/06/25 15:00:47 dfs Exp $
#
# This file may be distributed under the terms of the GNU General
# Public License.
#
# Usage: adsl-start [config_file]
# adsl-start interface user [config_file]
# Second form overrides USER and ETH from config file.
# If config_file is omitted, defaults to /etc/ppp/pppoe.conf
#
#***********************************************************************
# From AUTOCONF
prefix=/usr
exec_prefix=/usr
# Paths to programs
CONNECT=/usr/sbin/adsl-connect
ECHO=/bin/echo
IP=/sbin/ip
LS=/bin/ls
NETWORKDIR=/etc/sysconfig/network-scripts
get_device() {
if [ ! -d $NETWORKDIR ] ; then
$ECHO "** $NETWORKDIR not found"
$ECHO "** Quitting"
exit 1
fi
cd $NETWORKDIR
interfaces=$($LS ifcfg-ppp* 2>/dev/null | egrep -v '(~|\.bak)$' | \
egrep -v '(rpmsave|rpmorig|rpmnew)' | sed 's/^ifcfg-//g')
for i in $interfaces ; do
test -f ifcfg-$i && . ifcfg-$i 2>/dev/null
if [ "$TYPE" = "xDSL" ] ; then
CONFIG=$NETWORKDIR/ifcfg-$i
break
fi
done
}
# Set to "C" locale so we can parse messages from commands
LANG=C
export LANG
# Defaults
USER=""
ETH=""
ME=`basename $0`
# Must be root
if [ "`/usr/bin/id -u`" != 0 ] ; then
[ "$DEBUG" = "1" ] && $ECHO "$ME: You must be root to run this script" >& 2
exit 1
fi
# Debugging
if [ "$DEBUG" = "1" ] ; then
$ECHO "*** Running in debug mode... please be patient..."
DEBUG=`mktemp -d /tmp/pppoe-debug-XXXXXXXX`
if [ $? -ne 0 ] ; then
$ECHO "Could not create directory $DEBUG... exiting"
exit 1
fi
export DEBUG
DEBUG=$DEBUG/pppoe-debug.txt
# Initial debug output
$ECHO "---------------------------------------------" > $DEBUG
$ECHO "* The following section contains information about your system" >> $DEBUG
date >> $DEBUG
$ECHO "Output of uname -a" >> $DEBUG
uname -a >> $DEBUG
$ECHO "---------------------------------------------" >> $DEBUG
$ECHO "* The following section contains information about your network" >> $DEBUG
$ECHO "* interfaces. The one you chose for PPPoE should contain the words:" >> $DEBUG
$ECHO "* 'UP' and 'RUNNING'. If it does not, you probably have an Ethernet" >> $DEBUG
$ECHO "* driver problem." >> $DEBUG
$ECHO "Output of ip addr show" >> $DEBUG
$IP addr show >> $DEBUG
$ECHO "---------------------------------------------" >> $DEBUG
if [ "`uname -s`" = "Linux" ] ; then
$ECHO "* The following section contains information about kernel modules" >> $DEBUG
$ECHO "* If the module for your Ethernet card is 'tulip', you might" >> $DEBUG
$ECHO "* want to look for an updated version at http://www.scyld.com" >> $DEBUG
$ECHO "Output of lsmod" >> $DEBUG
lsmod >> $DEBUG
$ECHO "---------------------------------------------" >> $DEBUG
fi
$ECHO "* The following section lists your routing table." >> $DEBUG
$ECHO "* If you have an entry which starts with '0.0.0.0', you probably" >> $DEBUG
$ECHO "* have defined a default route and gateway, and pppd will" >> $DEBUG
$ECHO "* not create a default route using your ISP. Try getting" >> $DEBUG
$ECHO "* rid of this route." >> $DEBUG
$ECHO "Output of netstat -n -r" >> $DEBUG
netstat -n -r >> $DEBUG
$ECHO "---------------------------------------------" >> $DEBUG
$ECHO "Contents of /etc/resolv.conf" >> $DEBUG
$ECHO "* The following section lists DNS setup." >> $DEBUG
$ECHO "* If you can browse by IP address, but not name, suspect" >> $DEBUG
$ECHO "* a DNS problem." >> $DEBUG
cat /etc/resolv.conf >> $DEBUG
$ECHO "---------------------------------------------" >> $DEBUG
$ECHO "* The following section lists /etc/ppp/options." >> $DEBUG
$ECHO "* You should have NOTHING in that file." >> $DEBUG
$ECHO "Contents of /etc/ppp/options" >> $DEBUG
cat /etc/ppp/options >> $DEBUG 2>/dev/null
$ECHO "---------------------------------------------" >> $DEBUG
DEBUG="1"
fi
# Sort out command-line arguments
case "$#" in
1)
CONFIG="$1"
;;
3)
CONFIG="$3"
;;
esac
if [ -z "$CONFIG" ] ; then
get_device
[ -z "$CONFIG" ] && CONFIG=/etc/ppp/pppoe.conf
fi
if [ ! -f "$CONFIG" -o ! -r "$CONFIG" ] ; then
[ "$DEBUG" = "1" ] && $ECHO "$ME: Cannot read configuration file '$CONFIG'" >& 2
exit 1
fi
. $CONFIG
# Check for command-line overriding of ETH and USER
case "$#" in
2|3)
ETH="$1"
USER="$2"
;;
esac
# Check for pidfile
if [ -r "$PIDFILE" ] ; then
PID=`cat "$PIDFILE"`
# Check if still running
kill -0 $PID > /dev/null 2>&1
if [ $? = 0 ] ; then
[ "$DEBUG" = "1" ] && $ECHO "$ME: There already seems to be an ADSL connection up (PID $PID)" >& 2
exit 1
fi
# Delete bogus PIDFILE
rm -f "$PIDFILE" "$PIDFILE.pppd" "$PIDFILE.pppoe" "$PIDFILE.start"
fi
echo $$ > $PIDFILE.start #将adsl-start的进程号保存到$PIDFILE.start文件
# Start the connection in the background unless we're debugging
if [ "$DEBUG" = "1" ] ; then
$CONNECT "$@"
exit 0
fi
$CONNECT "$@" > /dev/null 2>&1 & #启动adsl-connect程序
CONNECT_PID=$! #保存adsl-connect程序的pid
if [ "$CONNECT_TIMEOUT" = "" -o "$CONNECT_TIMEOUT" = 0 ] ; then
exit 0
fi
# Don't monitor connection if dial-on-demand
if [ "$DEMAND" != "" -a "$DEMAND" != "no" ] ; then
exit 0
fi
# Monitor connection
TIME=0
while [ true ] ; do
/usr/sbin/adsl-status $CONFIG > /dev/null 2>&1 #监控时，通过adsl-status来检测
# Looks like the interface came up
if [ $? = 0 ] ; then
# Print newline if standard input is a TTY
[ "$DEBUG" = "1" ] && tty -s && $ECHO " Connected!"
cp -f /etc/ppp/resolv.conf /etc/
exit 0 #连接成功后，退出监控
fi
if test -n "$FORCEPING" ; then
[ "$DEBUG" = "1" ] && $ECHO -n "$FORCEPING"
else
[ "$DEBUG" = "1" ] && tty -s && $ECHO -n "$PING"
fi
sleep $CONNECT_POLL
TIME=`expr $TIME + $CONNECT_POLL`
if [ $TIME -gt $CONNECT_TIMEOUT ] ; then
break #60s超时后退出监控。
fi
done
[ "$DEBUG" = "1" ] && $ECHO "TIMED OUT" >& 2
# Timed out! Kill the adsl-connect process and quit
kill $CONNECT_PID > /dev/null 2>&1 #连接超时则将adsl-connect杀死
# Clean up PIDFILE(s)
rm -f "$PIDFILE" "$PIDFILE.pppd" "$PIDFILE.pppoe" "$PIDFILE.start" #连接超时则删除所有pidfile文件
# add old default gw back #添加默认路由
if [ -s /etc/default-route ] ; then
route add default gw `cat /etc/default-route`
rm -f /etc/default-route
fi
exit 1adsl-connect脚本：
#! /bin/bash
# Generated automatically from adsl-connect.in by configure.
#***********************************************************************
#
# adsl-connect
#
# Shell script to connect to an ADSL provider using PPPoE
#
# Copyright (C) 2000 Roaring Penguin Software Inc.
#
# $Id: adsl-connect.in,v 1.17 2001/09/14 19:07:42 dfs Exp $
#
# This file may be distributed under the terms of the GNU General
# Public License.
#
# Usage: adsl-connect [config_file]
# adsl-connect interface user [config_file]
# Second form overrides USER and ETH from config file.
# If config_file is omitted, defaults to /etc//ppp/pppoe.conf
#
#***********************************************************************
# From AUTOCONF
prefix=/usr
exec_prefix=/usr
localstatedir=/var
# Paths to programs
IP=/sbin/ip
PPPD=/usr/sbin/pppd
SETSID=/usr/bin/setsid
PPPOE=/usr/sbin/pppoe
BR2684CTL=/usr/sbin/br2684ctl
LOGGER="/usr/bin/logger -t `basename $0`"
NETWORKDIR=/etc/sysconfig/network-scripts
LS=/bin/ls
DEBUG=/var/log/pppoe.log
get_device() {
if [ ! -d $NETWORKDIR ] ; then
$ECHO "** $NETWORKDIR not found"
$ECHO "** Quitting"
exit 1
fi
cd $NETWORKDIR
interfaces=$($LS ifcfg-ppp* 2>/dev/null | egrep -v '(~|\.bak)$' | \
egrep -v '(rpmsave|rpmorig|rpmnew)' | sed 's/^ifcfg-//g')
for i in $interfaces ; do
test -f ifcfg-$i && . ifcfg-$i 2>/dev/null
if [ "$TYPE" = "xDSL" ] ; then
CONFIG=$NETWORKDIR/ifcfg-$i
break
fi
done
}
# Set to "C" locale so we can parse messages from commands
LANG=C
export LANG
# Must be root
if test "`/usr/bin/id -u`" != 0 ; then
echo "$0: You must be root to run this script" >& 2
exit 1
fi
if test "$SETSID" != "" -a ! -x "$SETSID"; then
SETSID=""
fi
USER=""
ETH=""
# Sort out command-line arguments
case "$#" in
1)
CONFIG="$1"
;;
3)
CONFIG="$3"
;;
esac
if [ -z "$CONFIG" ] ; then
get_device
[ -z "$CONFIG" ] && CONFIG=/etc/ppp/pppoe.conf
fi
if test ! -f "$CONFIG" -o ! -r "$CONFIG" ; then
echo "$0: Cannot read configuration file '$CONFIG'" >& 2
exit 1
fi
. $CONFIG
DEVNAME="$DEVICE"
PPPOE_PIDFILE="$PIDFILE.pppoe"
PPPD_PIDFILE="$PIDFILE"
if [ "$CONFIG" != "/etc/ppp/pppoe.conf" ] ; then
DEVNAME=`basename $CONFIG | sed 's/^ifcfg-//g'` #获取device名称，样式为：pppoe-port001.conf
fi
if [ -n "$BR2684DEV" ]; then
[ -z "$ETH" ] && ETH="nas$BR2684DEV"
modprobe br2684 > /dev/null 2>&1
fi
# Check for command-line overriding of ETH and USER
case "$#" in
2|3)
ETH="$1"
USER="$2"
;;
esac
# Check that config file is sane
if test "$USER" = "" ; then
echo "$0: Check '$CONFIG' -- no setting for USER" >& 2
exit 1
fi
if test "`basename \"$LINUX_PLUGIN\"`" = "pppoatm.so" ; then
if test "$VCI" = "" ; then
echo "$0: Check '$CONFIG' -- no setting for VCI" >& 2
exit 1
fi
if test "$VPI" = "" ; then
echo "$0: Check '$CONFIG' -- no setting for VPI" >& 2
exit 1
fi
else
if test "$ETH" = "" ; then
echo "$0: Check '$CONFIG' -- no setting for ETH" >& 2
exit 1
fi
fi
PPPD_PID=0
# Catch common error #若DEBUG=1，则不能使用adsl-connect，而是得用adsl-start
if test "$DEBUG" = "1" ; then
echo "*** If you want to use DEBUG, invoke adsl-start, not adsl-connect."
exit 1
fi
if test "$DEBUG" != "" ; then #DEBUG不等于1，也不等于空时，进入debug模式
if test "$LINUX_PLUGIN" != "" ; then
echo "Cannot use DEBUG mode and LINUX_PLUGIN at the same time."
echo "Kernel-mode PPPoE is experimental and unsupported." #若为LINUX_PLUGIN，退出
exit 1
fi
echo "* The following section identifies your Ethernet interface" >> $DEBUG
echo "* and user name. Some ISP's need 'username'; others" >> $DEBUG
echo "* need '[email protected]'. Try both" >> $DEBUG
echo "ETH=$ETH; USER=$USER" >> $DEBUG
echo "---------------------------------------------" >> $DEBUG
fi
# MTU of Ethernet card attached to modem MUST be 1500. This apparently
# fails on some *BSD's, so we'll only do it under Linux
if test `uname -s` = Linux ; then #仅支持linux系统
$IP link set $ETH up mtu 1500
# For 2.4 kernels. Will fail on 2.2.x, but who cares?
modprobe ppp_generic > /dev/null 2>&1
modprobe ppp_async > /dev/null 2>&1
modprobe ppp_synctty > /dev/null 2>&1
if test -n "$LINUX_PLUGIN" ; then
modprobe pppox > /dev/null 2>&1
modprobe pppoe > /dev/null 2>&1
fi
fi
if test "$SYNCHRONOUS" = "yes" ; then #是否同步，默认脚本是no
PPPOE_SYNC=-s
PPPD_SYNC=sync
# Increase the chances of it working on Linux...
if test `uname -s` = Linux ; then
modprobe n_hdlc > /dev/null 2>&1
fi
else
PPPOE_SYNC=""
PPPD_SYNC=""
fi
if test -n "$ACNAME" ; then #默认脚本中不存在该字段
ACNAME="-C $ACNAME"
fi
if test -n "$SERVICENAME" ; then #默认脚本中不存在该字段
SERVICENAME="-S $SERVICENAME"
fi
if test "$CLAMPMSS" = "no" ; then
CLAMPMSS=""
else
CLAMPMSS="-m $CLAMPMSS"
fi
# If DNSTYPE is SERVER, we must use "usepeerdns" option to pppd.
if test "$DNSTYPE" = "SERVER" ; then
PEERDNS=yes
fi
if test "$PEERDNS" = "yes" ; then #默认为yes
PEERDNS="usepeerdns"
else
PEERDNS=""
fi
if [ -z "$DEVICE" ] ; then
IPPARAM=""
LINKNAME=""
else
IPPARAM="ipparam ${DEVNAME}" #ipparam pppoe-port002.conf。DEVICE值为ppp_port002
LINKNAME="linkname ${DEVICE}" #linkname ppp_port002 。DEVICE值为
fi
[ -z "$MTU" ] && MTU="1492"
[ -z "$MRU" ] && MRU="1492"
# Backward config file compatibility
if test "$DEMAND" = "" ; then
DEMAND=no
fi
if test "$DEMAND" = "no" ; then #DEMAND默认为no
DEMAND=""
else
[ -z "$IPADDR" ] && IPADDR=10.112.112.112
[ -z "$REMIP" ] && REMIP=10.112.112.113
DEMAND="demand persist idle $CONNECT_TIMEOUT $IPADDR:$REMIP ipcp-accept-remote ipcp-accept-local noipdefault ktune"
# The plugin doesn't need (and may not _accept_) the 'connect' option
if [ -z "$LINUX_PLUGIN" ]; then
DEMAND="$DEMAND connect true"
fi
fi
case "$FIREWALL" in
STANDALONE)
. /etc/ppp/firewall-standalone
;;
MASQUERADE)
. /etc/ppp/firewall-masq
;;
esac
# If we're using kernel-mode PPPoE on Linux...
if test "`basename \"$LINUX_PLUGIN\"`" = "rp-pppoe.so" ; then
PLUGIN_OPTS="plugin $LINUX_PLUGIN $ETH"
modprobe pppoe > /dev/null 2>&1
fi
# If we're using kernel-mode PPPoATM on Linux...
if test "`basename \"$LINUX_PLUGIN\"`" = "pppoatm.so" ; then
PLUGIN_OPTS="plugin $LINUX_PLUGIN"
# Interface name MUST BE LAST!!
PLUGIN_OPTS="$PLUGIN_OPTS $VPI.$VCI"
modprobe pppoatm > /dev/null 2>&1
fi
if test "$DEFROUTE" != "no" ; then
DEFAULTROUTE="defaultroute"
# pppd will no longer delete an existing default route
# so we have to help it out a little here.
DEFRT=`ip route list | awk '/^default / { print $3 }'` #获取并保存default路由
[ -n "${DEFRT}" ] && echo $DEFRT > /etc/default-route
route del default >/dev/null 2>&1 #删除default路由
else
DEFAULTROUTE=""
fi
# Standard PPP options we always use
PPP_STD_OPTIONS="$IPPARAM $LINKNAME $PLUGIN_OPTS noipdefault noauth default-asyncmap $DEFAULTROUTE hide-password nodetach $PEERDNS mtu $MTU mru $MRU noaccomp noccp nobsdcomp nodeflate nopcomp novj novjccomp user $USER lcp-echo-interval $LCP_INTERVAL lcp-echo-failure $LCP_FAILURE $PPPD_EXTRA" #pppd命令显示信息
# PPPoE invocation # pppoe执行命令
PPPOE_CMD="$PPPOE -p $PPPOE_PIDFILE -I $ETH -T $PPPOE_TIMEOUT -U $PPPOE_SYNC $CLAMPMSS $ACNAME $SERVICENAME $PPPOE_EXTRA" #pppoe命令显示信息
if test "$DEBUG" != "" ; then
if test "$DEMAND" != "" ; then
echo "(Turning off DEMAND for debugging purposes)"
DEMAND=""
fi
echo "* The following section shows the pppd command we will invoke" >> $DEBUG
echo "pppd invocation" >> $DEBUG
echo "$SETSID $PPPD pty '$PPPOE_CMD' $PPP_STD_OPTIONS $PPPD_SYNC debug" >> $DEBUG
echo "---------------------------------------------" >> $DEBUG
$SETSID $PPPD pty "$PPPOE_CMD -D $DEBUG-0" \
$PPP_STD_OPTIONS \
$PPPD_SYNC \
debug >> $DEBUG 2>&1
echo "---------------------------------------------" >> $DEBUG
echo "* The following section is an extract from your log." >> $DEBUG
echo "* Look for error messages from pppd, such as" >> $DEBUG
echo "* a lack of kernel support for PPP, authentication failure" >> $DEBUG
echo "* etc." >> $DEBUG
if test -f "/var/log/messages" ; then
echo "Extract from /var/log/messages" >> $DEBUG
grep 'ppp' /var/log/messages | tail -150 >> $DEBUG
elif test -f "/var/adm/messages"; then
echo "Extract from /var/adm/messages" >> $DEBUG
grep 'ppp' /var/adm/messages | tail -150 >> $DEBUG
else
echo "Can't find messages file (looked for /var/{log,adm}/messages" >> $DEBUG
fi
date >> $DEBUG
echo "---------------------------------------------" >> $DEBUG
echo "* The following section is a dump of the packets" >> $DEBUG
echo "* sent and received by rp-pppoe. If you don't see" >> $DEBUG
echo "* any output, it's an Ethernet driver problem. If you only" >> $DEBUG
echo "* see three PADI packets and nothing else, check your cables" >> $DEBUG
echo "* and modem. Make sure the modem lights flash when you try" >> $DEBUG
echo "* to connect. Check that your Ethernet card is in" >> $DEBUG
echo "* half-duplex, 10Mb/s mode. If all else fails," >> $DEBUG
echo "* try using pppoe-sniff." >> $DEBUG
echo "rp-pppoe debugging dump" >> $DEBUG
cat $DEBUG-0 >> $DEBUG
rm -f $DEBUG-0
for i in 1 2 3 4 5 6 7 8 9 10 ; do
echo ""
echo ""
echo ""
done
echo "*** Finished debugging run. Please review the file"
echo "*** '$DEBUG' and try to"
echo "*** figure out what is going on."
echo "***"
echo "*** Unfortunately, we can NO LONGER accept debugging"
echo "*** output for analysis. Please do not send this to"
echo "*** Roaring Penguin; it is too time-consuming for"
echo "*** us to deal with all the analyses we have been sent."
exit 0
fi
echo $$ > $PIDFILE #将当前脚本的adsl-connect进程号写入pidfile文件中
while [ true ] ; do
if [ "${DEFROUTE}" != "no" ] ; then
DEFRT=`ip route list | awk '/^default / { print $3 }'`
[ -n "${DEFRT}" ] && echo $DEFRT > /etc/default-route
route del default >/dev/null 2>&1
fi
if test "$BR2684DEV" != ""; then
$BR2684CTL -b -c $BR2684DEV -a $VPI.$VCI
/sbin/ip link set $ETH up
fi
if test "$LINUX_PLUGIN" != "" ; then
$SETSID $PPPD $PPP_STD_OPTIONS $DEMAND &
echo "$!" > $PPPD_PIDFILE
else
$SETSID $PPPD pty "$PPPOE_CMD" \
$PPP_STD_OPTIONS \
$DEMAND \
$PPPD_SYNC &
echo "$!" > $PPPD_PIDFILE #记录pppd的pid进程号，此时会覆盖336行写入的adsl-connect的pid，但也不会导致
fi
wait
if test "$BR2684DEV" != ""; then
kill `cat /var/run/nas$BR2684DEV.pid`
rm /var/run/nas$BR2684DEV.pid
fi
# Run /etc/ppp/adsl-lost if it exists
test -x /etc/ppp/adsl-lost && /etc/ppp/adsl-lost
# Re-establish the connection
$LOGGER -p daemon.notice "ADSL connection lost; attempting re-connection."
# Wait a bit in case a problem causes tons of log messages :-)
sleep 5
done
adsl-stop脚本：
#! /bin/bash
# Generated automatically from adsl-stop.in by configure.
#***********************************************************************
#
# adsl-stop
#
# Shell script to bring down an ADSL connection
#
# Copyright (C) 2000 Roaring Penguin Software Inc.
#
# $Id: adsl-stop.in,v 1.4 2001/04/02 13:59:14 dfs Exp $
#
# This file may be distributed under the terms of the GNU General
# Public License.
#
# Usage: adsl-stop [config_file]
# If config_file is omitted, defaults to /etc/ppp/pppoe.conf
#
#***********************************************************************
export PATH=/sbin:/bin:/usr/sbin:/usr/bin
LS=/bin/ls
NETWORKDIR=/etc/sysconfig/network-scripts
# Set to "C" locale so we can parse messages from commands
LANG=C
export LANG
get_device() {
if [ ! -d $NETWORKDIR ] ; then
$ECHO "** $NETWORKDIR not found"
$ECHO "** Quitting"
exit 1
fi
cd $NETWORKDIR
interfaces=$($LS ifcfg-ppp* 2>/dev/null | egrep -v '(~|\.bak)$' | \
egrep -v '(rpmsave|rpmorig|rpmnew)' | sed 's/^ifcfg-//g')
for i in $interfaces ; do
test -f ifcfg-$i && . ifcfg-$i 2>/dev/null
if [ "$TYPE" = "xDSL" ] ; then
CONFIG=$NETWORKDIR/ifcfg-$i
break
fi
done
}
ME="`basename $0`"
LOGGER="/usr/bin/logger -t $ME"
CONFIG="$1"
if [ -z "$CONFIG" ] ; then
get_device
[ -z "$CONFIG" ] && CONFIG=/etc/ppp/pppoe.conf
fi
if [ ! -f "$CONFIG" -o ! -r "$CONFIG" ] ; then
[ "$DEBUG" = "1" ] && echo "$ME: Cannot read configuration file '$CONFIG'" >& 2
exit 1o
fi
. $CONFIG
PPPOE_PIDFILE="$PIDFILE.pppoe"
PPPD_PIDFILE="$PIDFILE"
STARTPID="$PIDFILE.start"
# Backward config file compatibility
if test "$DEMAND" = "" ; then
DEMAND=no
fi
# Ignore SIGTERM
trap "" 15
# Check for pidfile
if [ -r "$PIDFILE" ] ; then
PID=`cat $PIDFILE`
# Check if still running
kill -0 $PID > /dev/null 2>&1
if [ $? != 0 ] ; then
[ "$DEBUG" = "1" ] && echo "$ME: The adsl-connect script (PID $PID) appears to have died" >& 2
fi
# Kill pppd, which should in turn kill pppoe
if [ -r "$PPPD_PIDFILE" ] ; then
PPPD_PID=`cat "$PPPD_PIDFILE"`
$LOGGER -p daemon.notice "Killing pppd"
[ "$DEBUG" = "1" ] && echo "Killing pppd ($PPPD_PID)"
kill $PPPD_PID > /dev/null 2>&1
fi
# Kill adsl-start
PIDS=`cat $STARTPID`
kill -0 $PIDS > /dev/null 2>&1
if [ $? = 0 ] ; then
$LOGGER -p daemon.notice "Killing adsl-start"
kill $PIDS > /dev/null 2>&1
fi
# Kill adsl-connect
$LOGGER -p daemon.notice "Killing adsl-connect"
[ "$DEBUG" = "1" ] && echo "Killing adsl-connect ($PID)"
kill $PID > /dev/null 2>&1
# Kill br2684ctl if necessary
if [ -n "$BR2684DEV" -a -r /var/run/nas$BR2684DEV.pid ]; then
PIDS=`cat /var/run/nas$BR2684DEV.pid`
kill -0 $PIDS > /dev/null 2>&1
if [ $? = 0 ]; then
$LOGGER -p daemon.notice "Killing br2684ctl for nas$BR2684DEV"
kill $PIDS > /dev/null 2>&1
fi
rm -f /var/run/nas$BR2684DEV.pid
fi
rm -f "$PIDFILE" "$PPPD_PIDFILE" "$PPPOE_PIDFILE" "$STARTPID"
else
[ "$DEBUG" = "1" ] && echo "$ME: No ADSL connection appears to be running" >&2
exit 1
fi
# add old default gw back
if [ -s /etc/default-route ] ; then
route add default gw `cat /etc/default-route`
rm -f /etc/default-route
fi
exit 0
pppoe.conf文件：
USERCTL=yes
BOOTPROTO=dialup
NAME=DSLppp_0
DEVICE=ppp_0
TYPE=xDSL
ONBOOT=no
PIDFILE=/var/run/pppoe-adsl.pid
FIREWALL=MASQUERADE
PING=.
PPPOE_TIMEOUT=80
LCP_FAILURE=3
LCP_INTERVAL=20
CLAMPMSS=1412
CONNECT_POLL=6
CONNECT_TIMEOUT=60
DEFROUTE=yes
SYNCHRONOUS=no
ETH=port002
PROVIDER=DSLppp_0
USER=test
PEERDNS=yes
DEMAND=no若是指定接口eth0启动pppoe时，需要修改pppoe.conf文件为：
USERCTL=yes
BOOTPROTO=dialup
NAME=DSLppp_eth0
DEVICE=ppp_eth0
TYPE=xDSL
ONBOOT=no
PIDFILE=/var/run/pppoe-adsl.pid
FIREWALL=MASQUERADE
PING=.
PPPOE_TIMEOUT=80
LCP_FAILURE=3
LCP_INTERVAL=20
CLAMPMSS=1412
CONNECT_POLL=6
CONNECT_TIMEOUT=60
DEFROUTE=yes
SYNCHRONOUS=no
ETH=eth0
PROVIDER=DSLppp_eth0
USER=test
PEERDNS=yes
DEMAND=nochap-secrets文件：
# Secrets for authentication using CHAP
# client server secret IP addresses
####### redhat-config-network will overwrite this part!!! (begin) ##########
####### redhat-config-network will overwrite this part!!! (end) ############
test * test *pap-secrets文件：
# Secrets for authentication using PAP
# client server secret IP addresses
####### redhat-config-network will overwrite this part!!! (begin) ##########
####### redhat-config-network will overwrite this part!!! (end) ############
test * test *