500u单线多WAN

#!/bin/ash

# load-balance(X-WAN) Script VER 0.23 by rightzd 20110902 | 单线X W AN版

# 使用方法：

# 双W AN接口模式选择为“单物理口双W AN”, 双W AN模式选择为“自定义脚本”并把本脚本内容粘贴进去，W AN2路由表选择为自定义并保持内容为空

# iptables -t nat -I POSTROUTING -o ppp+ -j MASQUERADE这句放在系统管理->脚本设置->防火墙脚本里

# 一般只需要修改USER, PASSWD, W ANNUM这3个参数就可以

# WAN1, W AN2是固件自动拨号的，从W AN3起由脚本负责拨号。WAN1，W AN2的指定出口功能有效，不过如果修改设置后请重启路由器。

LOGGER=logger

LOCK_FILE=/var/policyroute-set.lock

XW AN_OK=/var/xwan_ok

NETLIST=/var/policyroute-netlist

#宽带用户名和密码

USER="test"

PASSWD="123456"

#榨干你的线路，修改这个参数为线路允许的多拨次数

WANNUM=4

MTU=$(nvram get wan_mtu)

MACBASE=$(nvram get wan_hwaddr)

#对MAC进行递增，注意跨度不要太大，目前只支持最后两位的递增

MACINC() {

mac=$1

value=$2

b1=`printf "%d" 0x${mac:0:2}`

b2=`printf "%d" 0x${mac:3:2}`

b3=`printf "%d" 0x${mac:6:2}`

b4=`printf "%d" 0x${mac:9:2}`

b5=`printf "%d" 0x${mac:12:2}`

b6=`printf "%d" 0x${mac:15:2}`

let x=$b6+$value

let b6=$((x%255))

let b5=b5+$((x/255))

let x=b5

let b5=$((x%255))

let b4=b4+$((x/255))

NEWMAC=`printf "%x:%x:%x:%x:%x:%x" ${b1} ${b2} ${b3} ${b4} ${b5} ${b6}`

}

#进行一个PPPoE拨号

PPPOE() {

iface=$1

let ipparam=$2-1

$(pppoecd $iface -u $USER -p $PASSWD -r $MTU -t $MTU -P $ipparam) }

#激活一个W AN口，参数类型是数字，如IFUP 3表示激活W AN3

IFUP() {

parent=$1

iface="veth"$2

ip link add link $parent $iface type macvlan

MACINC $MACBASE $2

ifconfig $iface hw ether $NEWMAC up

PPPOE $iface $2

}

IFDOWN() {

parent=$1

iface="veth"$2

ip link del link $parent $iface type macvlan

}

ALLIFUP() {

wanid=3

while [ $wanid -le $WANNUM ]

do

IFUP vlan1 $wanid

let wanid=wanid+1

done

}

ALLIFDOWN() {

wanid=3

while [ $wanid -le $WANNUM ]

do

IFDOWN vlan1 $wanid

let wanid=wanid+1

done

}

GET_PPP_GATEW AY() {

iface=$1

echo "iface="$iface

PPP_IP=$(ifconfig $iface|grep "inet addr"|awk -F ":" '{print $2}'|awk -F " " '{print $1}')

PPP_GATEW AY=$PPP_IP

}

SET_FIXED_ROUTE() {

wanid=$1

rtbl=${wanid}00

$LOGGER "set fixed route via WAN${wanid}..."

if [ -f $NETLIST ]; then

MY_LINE_NO=1

while read MY_LINE

do

ip rule add to $MY_LINE table $rtbl prio 200

MY_LINE_NO=$((MY_LINE_NO+1))

done < $NETLIST

fi

}

BUILD_WAN_ROUTETAB() {

wanid=$1

$LOGGER "set WAN${wanid} route table ..."

rtbl=${wanid}00

if [ "$wanid" == "1" ]; then

prefix="wan"

else

prefix="wan"${wanid}

fi

WAN_GATEW AY=$(nvram get ${prefix}_gateway)

WAN_IFACE=$(nvram get ${prefix}_iface)

WAN_IP=$(ifconfig $WAN_IFACE|grep "inet addr"|awk -F ":" '{print $2}'|awk -F " " '{print $1}')

WAN_WEIGHT=$(nvram get xwan_wan${wanid}_weight)

if [ "$WAN_IP" == "" ]; then

$LOGGER "Start PolicyRouting fail, BUILD_WAN_ROUTETAB, WAN${wanid} NO IP"

return

fi

ip route flush table $rtbl

ip route | while read ROUTE

do

if [ ! "${ROUTE:0:7}" = "default" ]; then

ip route append table $rtbl to $ROUTE

fi

done

ip route replace table $rtbl default via $WAN_GATEW AY dev $WAN_IFACE src $WAN_IP

#设置ip rule

ip rule add from $WAN_IP table $rtbl prio 100

# DNS Rule

WAN_GET_DNS=$(nvram get ${prefix}_dns)

if [ "$WAN_GET_DNS" = "" ]; then

WAN_GET_DNS=$(nvram get ${prefix}_get_dns)

fi

for WAN_DNS in $W AN_GET_DNS

do

$LOGGER "set WAN${wanid} route($WAN_GATEW AY) for DNS:$W AN_DNS"

if [ ! "$WAN_DNS" = "0.0.0.0" ]; then

ip rule add to $W AN_DNS table $rtbl prio 150

fi

done

}

SET_ASSIGNOUT_RULE() {

#8. AssignOUT 规则

# wan1

ip rule add fwmark 0x100/0xf00 table 100 prio 110

# wan2

ip rule add fwmark 0x200/0xf00 table 200 prio 110

}

SET_PPTP_RULE() {

# PPTP DNS Rule

USE_PEERDNS=$(nvram get pptp_client_peerdns)

if [ "$USE_PEERDNS" = "1" ]; then

PPTP_GET_DNS=$(nvram get pptp_client_get_dns)

for PPTP_DNS in $PPTP_GET_DNS

do

if [ ! "$PPTP_DNS" = "0.0.0.0" ]; then

ip rule add to $PPTP_DNS table 250 prio 149

fi

done

fi

}

BUILD_ROUTE_LB() {

$LOGGER "set default router with load-balance"

pppid=0

lbstr="ip route replace default scope global "

while [ $pppid -le $WANNUM ]

do

pppif=ppp$pppid

GET_PPP_GATEW AY $pppif

if [ "$PPP_GATEW AY" != "" ]; then

lbstr="$lbstr nexthop via $PPP_GA TEW AY dev $pppif"

fi

ip route delete default

let pppid=pppid+1

done

echo $lbstr

$lbstr

$LOGGER "clear route cache..."

ip route flush cache

}

$LOGGER "Start PolicyRouting ..."

if [ -f $XWAN_OK ]; then

BUILD_ROUTE_LB

$LOGGER "Start PolicyRouting exit, XW AN_OK."

exit

fi

if [ -f $LOCK_FILE ]; then

$LOGGER "Start PolicyRouting exit, other process starting."

exit

fi

echo "SETTING" > $LOCK_FILE

$LOGGER "disable rp_filter "

echo '0' >/proc/sys/net/ipv4/conf/all/rp_filter

if [ "$1" = "" ]; then

ALLIFUP

else

ALLIFDOWN

fi

sleep 10

#1. set ip rules

ip rule flush

ip rule del table main

ip rule del table default

ip rule add lookup main prio 32766

ip rule add lookup default prio 32767

#2. 设置走WAN1的静态路由(路由表来自网页设置"WAN2"自定义路由表) SET_FIXED_ROUTE 1

#3. 设置每个W AN口的路由表

wanid=1

while [ $wanid -le 2 ]

do

BUILD_WAN_ROUTETAB $wanid

let wanid=wanid+1

done

SET_ASSIGNOUT_RULE

SET_PPTP_RULE

BUILD_ROUTE_LB

$LOGGER "Start PolicyRouting success."

echo "OK" > $XW AN_OK

rm $LOCK_FILE