#!/bin/bash

interface1=`ls /sys/class/net|grep en|awk 'NR==1{print}'`

interface2=`ls /sys/class/net|grep en|awk 'NR==2{print}'`

interfaces_file="/etc/network/interfaces"

while getopts "i:g:b:" opt; do

    case $opt in

        i)

            ip=$OPTARG

            ;;

        g)

            gateway=$OPTARG

            ;;

        b)

            broadcast=$OPTARG

            ;;

        \?)

            ;;

    esac

done

echo $ip

echo $gateway

echo $broadcast

function set_bridge(){

     #写网卡配置文件

     cat > "$interfaces_file" <<EOF

auto lo br0

iface lo inet loopback

auto $interface1

iface $interface1 inet manual

auto $interface2

iface $interface2 inet manual

iface br0 inet static

bridge_ports $interface1 $interface2

address $ip

broadcast $broadcast

netmask 255.255.255.0

gateway $gateway

EOF

sudo /etc/init.d/networking restart

 #检查ip地址是否设置成功

    res=`ip addr show br0 |grep -c "$ip"`

    if [ "$res" -eq  ];then

        echo "ip地址设置失败" >&

        return

    fi

#检查默认路由是不是gateway

    res=`ip route |grep -c "default\s*via\s*$gateway\s*dev\s*br0"`

    if [ "$res" -eq  ];then

        echo "网关设置失败" >&

        return

    fi

    return

}

    set_bridge