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adb shell
改变网卡网址
ifconfig eth0 192.168.0.167 up
添加虚拟网卡 ifconfig eth0:0 192.168.10.10 up
以上的命令就可以在eth0网卡上创建一个叫eth0:0的虚拟网卡,他的地址是:192.168.10.10 删除虚拟网卡
ifconfig eth0:0 down ip route 查看路由表的内容
…adb root
adb shell
改变网卡网址
ifconfig eth0 192.168.0.167 up
添加虚拟网卡 ifconfig eth0:0 192.168.10.10 up
以上的命令就可以在eth0网卡上创建一个叫eth0:0的虚拟网卡,他的地址是:192.168.10.10 删除虚拟网卡
ifconfig eth0:0 down ip route 查看路由表的内容
G8142:/ $ ip route
192.168.31.0/24 dev wlan0 proto kernel scope link src 192.168.31.165 ip rule 显示当前路由策略
Android设备中可以使用命令ip rule显示现有的路由策略如下所示rk3399_all:/ # ip rule
0: from all lookup local
10000: from all to 172.29.7.148 lookup eth0
10000: from all fwmark 0xc0000/0xd0000 lookup legacy_system
10500: from all iif lo oif dummy0 uidrange 0-0 lookup dummy0
10500: from all iif lo oif eth0 uidrange 0-0 lookup eth0
13000: from all fwmark 0x10063/0x1ffff iif lo lookup local_network
13000: from all fwmark 0x10064/0x1ffff iif lo lookup eth0
14000: from all iif lo oif dummy0 lookup dummy0
14000: from all iif lo oif eth0 lookup eth0
15000: from all fwmark 0x0/0x10000 lookup legacy_system
16000: from all fwmark 0x0/0x10000 lookup legacy_network
17000: from all fwmark 0x0/0x10000 lookup local_network
19000: from all fwmark 0x64/0x1ffff iif lo lookup eth0
22000: from all fwmark 0x0/0xffff iif lo lookup eth0
23000: from all fwmark 0x0/0xffff uidrange 0-0 lookup main
32000: from all unreachable
rk3399_all:/ #其中第一列表示策略号码同时也是策略对应的索引值可支持上万条策略
策略号码数值越小表示该条策略的优先级越高。策略0为优先级最高的策略
在数据包进行路由时首先匹配该数据包是否满足策略0的规则
即所有的数据包去 local路由表中去查找自己的路由方向
没有找到则使用下一优先级的路由策略这里为10000号策略
即所有的数据包发往172.29.7.148的都从eth0网卡出去。rk3399_all:/ # ip route list table local
broadcast 127.0.0.0 dev lo proto kernel scope link src 127.0.0.1
local 127.0.0.0/8 dev lo proto kernel scope host src 127.0.0.1
local 127.0.0.1 dev lo proto kernel scope host src 127.0.0.1
broadcast 127.255.255.255 dev lo proto kernel scope link src 127.0.0.1
broadcast 172.29.0.0 dev eth0 proto kernel scope link src 172.29.7.28
local 172.29.7.28 dev eth0 proto kernel scope host src 172.29.7.28
broadcast 172.29.255.255 dev eth0 proto kernel scope link src 172.29.7.28
rk3399_all:/ #130|G8142:/ $ ip rule ls
0: from all lookup local
10000: from all fwmark 0xc0000/0xd0000 lookup 99
10500: from all oif dummy0 uidrange 0-0 lookup 1003
10500: from all oif wlan0 uidrange 0-0 lookup 1023
13000: from all fwmark 0x10063/0x1ffff lookup 97
13000: from all fwmark 0x10064/0x1ffff lookup 1023
14000: from all oif dummy0 lookup 1003
14000: from all oif wlan0 lookup 1023
15000: from all fwmark 0x0/0x10000 lookup 99
16000: from all fwmark 0x0/0x10000 lookup 98
17000: from all fwmark 0x0/0x10000 lookup 97
19000: from all fwmark 0x64/0x1ffff lookup 1023
22000: from all fwmark 0x0/0xffff lookup 1023
23000: from all fwmark 0x0/0xffff uidrange 0-0 lookup main
32000: from all unreachable 路由策略数据库管理命令 G8142:/ $ ip route
192.168.31.0/24 dev wlan0 proto kernel scope link src 192.168.31.165G8142:/ $ ifconfig
wlan0 Link encap:UNSPEC Driver icnssinet addr:192.168.31.165 Bcast:192.168.31.255 Mask:255.255.255.0inet6 addr: fe80::86c7:eaff:fe2d:b98/64 Scope: LinkUP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1RX packets:6644 errors:0 dropped:0 overruns:0 frame:0TX packets:6980 errors:0 dropped:0 overruns:0 carrier:0collisions:0 txqueuelen:3000RX bytes:6001248 TX bytes:1155447 kuznetamber:~ $ ip ru ls0: from all lookup local200: from 192.203.80.0/24 to 193.233.7.0/24 lookup main210: from 192.203.80.0/24 to 192.203.80.0/24 lookup main220: from 192.203.80.0/24 lookup inr.ruhep realms inr.ruhep/radio-msu300: from 193.233.7.83 to 193.233.7.0/24 lookup main310: from 193.233.7.83 to 192.203.80.0/24 lookup main320: from 193.233.7.83 lookup inr.ruhep map-to 192.203.80.14432766: from all lookup mainkuznetamber:~ $每行第一部分的数字是规则的优先级接着是选择符。关键词lookup后面接着路由表识别符。如果规则要进行网络地址转换还需要一个关键词map-to设置转换以后的地址。上面的示例非常简单192.203.80.0/24和193.233.7.0/24组成内部网络但是它们向外发送数据包要通过不同的路由。主机193.233.7.83和外界会话时地址需要转换为192.203.80.144。 查看路由表 最早的策略配置方式是写了个shell脚本配置了如下策略对于目的IP为77/78的都走eth0网卡。在init.rc中开启对应的服务ipruleservice网卡启动或者链路有变化调用该服务配置策略ipruleservice中命令如下
ip rule add to 192.168.1.78 table eth0
ip rule add to 192.168.1.77 table eth0 APP 实际应用
public static final int TRANSPORT_BLUETOOTH 2;
public static final int TRANSPORT_CELLULAR 0;
public static final int TRANSPORT_ETHERNET 3;
public static final int TRANSPORT_LOWPAN 6;
public static final int TRANSPORT_USB 8;
public static final int TRANSPORT_VPN 4;
public static final int TRANSPORT_WIFI 1;
public static final int TRANSPORT_WIFI_AWARE 5;
考虑一个特殊的需求某app只能通过WIFI接口去传输数据是否可以实现较新版本的android已经支持了该功能通过调用setProcessDefaultNetwork()可以指定某一进程的网络接口
该进程在创建socket时(app首先调用setProcessDefaultNetwork())android底层会利用setsockopt函数设置该socket的SO_MARK为netIdandroid有自己的管理逻辑每个Network有对应的ID以后利用该socket发送的数据都会被打上netId的标记(fwmark 值)
