我想创建app，重新路由数据包。我使用vpnservice（因为不需要root手机），使用toyVpn和这段代码 http://www.thegeekstuff.com/2014/06/Android-vpn-service/ 但问题出在这一行DatagramChannel tunnel = DatagramChannel.open（）; 这行抛出异常。 这是我的代码
public class MyVpnService extends VpnService {
public static String CONNECTION = "StartService";
public static String DISCONNECTION = "StopService";
public static boolean work = false;
private Thread mThread;
private ParcelFileDescriptor mInterface;
Builder builder = new Builder();
// Services interface
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// Start a new session by creating a new thread.
if (intent != null && DISCONNECTION.equals(intent.getAction())) {
work = false;
stopForeground(true);
mThread.interrupt();
stopSelf();
return START_NOT_STICKY;
}
work = true;
mThread = new Thread(new Runnable() {
@Override
public void run() {
try {
Log.d("VPNservice", "0");
mInterface = builder.setSession("MyVPNService")
.addAddress("192.168.1.3", 24)
.addDnsServer("8.8.8.8")
.addRoute("0.0.0.0", 0).establish();
FileInputStream in = new FileInputStream(
mInterface.getFileDescriptor());
FileOutputStream out = new FileOutputStream(
mInterface.getFileDescriptor());
Log.d("VPNservice", "1 " + (mInterface != null));
DatagramChannel tunnel = DatagramChannel.open();
Log.d("VPNservice", "2 " + (tunnel != null));
Log.d("VPNservice", "3 " + tunnel.connect(new InetSocketAddress("127.0.0.1", 8087)));
//tunnel.connect(new InetSocketAddress("127.0.0.1", 8087));
tunnel.configureBlocking(false);
protect(tunnel.socket());
//e. Use a loop to pass packets.
ByteBuffer packet = ByteBuffer.allocate(Short.MAX_VALUE);
Log.d("VPNservice", "4");
while (!Thread.interrupted()) {
Log.d("VPNservice", "5");
int length = in.read(packet.array());
if (length > 0) {
packet.limit(length);
tunnel.write(packet);
// There might be more outgoing packets.
Log.d("VPNservice", "6");
}
Log.d("VPNservice", "7");
length = tunnel.read(packet);
Log.d("VPNservice", "8");
if (length > 0) {
if (packet.get(0) != 0) {
out.write(packet.array(), 0, length);
Log.d("VPNservice", "9");
}
packet.clear();
Log.d("VPNservice", "10");
}
Thread.sleep(100);
Log.d("VPNservice", "11");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (mInterface != null) {
mInterface.close();
mInterface = null;
}
} catch (Exception e) {
}
}
}
}, "MyVpnRunnable");
//start the service
mThread.start();
return START_STICKY;
}
@Override
public void onDestroy() {
// TODO Auto-generated method stub
if (mThread != null) {
mThread.interrupt();
}
super.onDestroy();
}
}
这是日志：
07-02 15:13:09.271 8853-8853/app.my.myvpnservice D/ActivityThread: SVC-Calling onStartCommand: app.my.myvpnservice.MyVpnService@424f59f0, flags=0, startId=1
07-02 15:13:09.272 8853-8853/app.my.myvpnservice D/dalvikvm: create interp thread : stack size=128KB
07-02 15:13:09.272 8853-8853/app.my.myvpnservice D/dalvikvm: create new thread
07-02 15:13:09.274 8853-8853/app.my.myvpnservice D/dalvikvm: new thread created
07-02 15:13:09.274 8853-8853/app.my.myvpnservice D/dalvikvm: update thread list
07-02 15:13:09.274 8853-9304/app.my.myvpnservice D/dalvikvm: threadid=11: interp stack at 0x7d83d000
07-02 15:13:09.274 8853-9304/app.my.myvpnservice D/dalvikvm: threadid=11: created from interp
07-02 15:13:09.274 8853-8853/app.my.myvpnservice D/dalvikvm: start new thread
07-02 15:13:09.274 8853-9304/app.my.myvpnservice D/dalvikvm: threadid=11: notify debugger
07-02 15:13:09.274 8853-9304/app.my.myvpnservice D/dalvikvm: threadid=11 (MyVpnRunnable): calling run()
07-02 15:13:09.275 8853-8853/app.my.myvpnservice D/ActivityThread: SVC-SERVICE_ARGS handled : 0 / ServiceArgsData{token=android.os.BinderProxy@424ef338 startId=1 args=Intent { act=StartService cmp=app.my.myvpnservice/.MyVpnService }}
07-02 15:13:09.275 8853-9304/app.my.myvpnservice D/VPNservice: 0
07-02 15:13:09.306 8853-8853/app.my.myvpnservice D/ActivityThread: SVC-BIND_SERVICE handled : 0 / BindServiceData{token=android.os.BinderProxy@424ef338 intent=Intent { act=android.net.VpnService cmp=app.my.myvpnservice/.MyVpnService }}
07-02 15:13:09.447 8853-9304/app.my.myvpnservice D/VPNservice: 1 true
07-02 15:13:09.471 8853-9304/app.my.myvpnservice W/System.err: java.net.SocketException: socket failed: EACCES (Permission denied)
07-02 15:13:09.481 8853-9304/app.my.myvpnservice W/System.err: at libcore.io.IoBridge.socket(IoBridge.java:622)
07-02 15:13:09.481 8853-9304/app.my.myvpnservice W/System.err: at java.nio.DatagramChannelImpl.<init>(DatagramChannelImpl.java:75)
07-02 15:13:09.481 8853-9304/app.my.myvpnservice W/System.err: at java.nio.SelectorProviderImpl.openDatagramChannel(SelectorProviderImpl.java:33)
07-02 15:13:09.481 8853-9304/app.my.myvpnservice W/System.err: at java.nio.channels.DatagramChannel.open(DatagramChannel.java:66)
07-02 15:13:09.481 8853-9304/app.my.myvpnservice W/System.err: at app.my.myvpnservice.MyVpnService$1.run(MyVpnService.java:50)
07-02 15:13:09.482 8853-9304/app.my.myvpnservice W/System.err: at java.lang.Thread.run(Thread.java:848)
07-02 15:13:09.482 8853-9304/app.my.myvpnservice W/System.err: Caused by: libcore.io.ErrnoException: socket failed: EACCES (Permission denied)
07-02 15:13:09.482 8853-9304/app.my.myvpnservice W/System.err: at libcore.io.Posix.socket(Native Method)
07-02 15:13:09.482 8853-9304/app.my.myvpnservice W/System.err: at libcore.io.BlockGuardOs.socket(BlockGuardOs.java:181)
07-02 15:13:09.482 8853-9304/app.my.myvpnservice W/System.err: at libcore.io.IoBridge.socket(IoBridge.java:607)
07-02 15:13:09.482 8853-9304/app.my.myvpnservice W/System.err: ... 5 more
07-02 15:13:09.536 8853-9304/app.my.myvpnservice D/dalvikvm: threadid=11: exiting
07-02 15:13:09.536 8853-9304/app.my.myvpnservice D/dalvikvm: threadid=11: bye!
07-02 15:13:09.583 8853-8853/app.my.myvpnservice D/ActivityThread: SVC-UNBIND_SERVICE handled : 0 / BindServiceData{token=android.os.BinderProxy@424ef338 intent=Intent { act=android.net.VpnService cmp=app.my.myvpnservice/.MyVpnService }}
我还有一个问题。我是否必须使用vpn服务器，或者我可以使用默认方式（隧道）支持数据包而不使用此服务吗？
答案 0 :(得分：1)
这个问题已经很老了，但是...
在您的堆栈跟踪中有以下行：
SocketException：套接字失败：EACCES（权限被拒绝）
这似乎是一个权限问题。您可以通过在您的 AndroidManifest.xml 中添加 INTERNET 权限来解决该问题（如果您已经拥有此权限并且仍然遇到此异常，只需添加像这样的 ACCESS 权限）：
<manifest
..... >
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<application
....
答案 1 :(得分：-1)
已经对您的AndroidManifest .xml文件设置了权限？像这样一个：
<service
android:name=".MyVpnService"
android:enabled="true"
android:exported="true"
android:permission="android.permission.BIND_VPN_SERVICE">
<intent-filter>
<action android:name="android.net.VpnService"/>
</intent-filter>
</service>