利用tc工具做限速

前言

有关tc的介绍，可以参见tc

tc的使用

tc封装的脚本

#!/bin/bash
#a simple example for "tc"
#set the param
PORT=$2
DELAY=$3
SPEED=$4
FLOW=$5
NETWORK_CARD=eth1    

set -x
start () {
    /sbin/tc qdisc add dev ${NETWORK_CARD} root handle 1: htb default 25
    /sbin/tc class add dev ${NETWORK_CARD} parent 1: classid 1:1 htb rate ${SPEED}kbps
    /sbin/tc qdisc add dev ${NETWORK_CARD} parent 1:1 netem delay ${DELAY}ms ${FLOW}ms
    /sbin/tc filter add dev ${NETWORK_CARD} parent 1: protocol ip prio 1 u32 match ip sport ${PORT} 0xffff flowid 1:1
}

stop () {
    /sbin/tc qdisc dele dev ${NETWORK_CARD} root
}

case "$1" in    
    start)
        start
        ;;
    stop)
        stop
        ;;
    *)
        echo "Usage: `basename $0` {start|stop} port delay(ms) speed(KB) flow(ms)"
esac

使用方法

3g 限制http： sh /root/net_limit.sh start 8900 200 355 0
3g 限制Spdy： sh /root/net_limit.sh start 8901 200 355 0
 
慢wifi限制http:  sh /root/net_limit.sh start 8900 80 2048 0
慢wifi限制spdy:  sh /root/net_limit.sh start 8901 80 2048 0
 
快wifi限制http: sh /root/net_limit.sh start 8900 40 14748 0
快wifi限制spdy: sh /root/net_limit.sh start 8901 40 14748 0

查看当前限制

tc -s qdisc ls dev eth1