我一直在编辑
androids
toyvpn vpn的示例项目,我得到这个为我的示例应用程序
我知道有一些错误/缺少我的代码,因为当我手动设置vpn通过Android设置,有数据包接收这就是为什么
我一直在搜索如何接收数据包,我不知道如何使这个工作.
这里是我的源代码,VCL扩展了VpnService
import android.app.PendingIntent;
import android.net.VpnService;
import android.os.ParcelFileDescriptor;
import android.util.Log;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.DatagramChannel;
/**
* Created by Jameshwart Lopez on 8/18/15.
*/
public class VCL extends VpnService {
private static final String TAG = "VpnClientLibrary";
private Thread mThread;
private ParcelFileDescriptor mInterface;
private String mServerAddress;
private String mServerPort;
private PendingIntent mConfigureIntent;
private String mParameters;
//a. Configure a builder for the interface.
Builder builder = new Builder();
public void vclRun(){
try {
//a. Configure the TUN and get the interface.
mInterface = builder.setSession("thesessionname")
.addAddress("192.168.0.1",24)
.addDnsServer("8.8.8.8")
.addRoute("0.0.0.0",0).establish();
//b. Packets to be sent are queued in this input stream.
FileInputStream in = new FileInputStream(mInterface.getFileDescriptor());
//b. Packets received need to be written to this output stream.
FileOutputStream out = new FileOutputStream(mInterface.getFileDescriptor());
// Allocate the buffer for a single packet.
ByteBuffer packet = ByteBuffer.allocate(32767);
//c. The UDP channel can be used to pass/get ip package to/from server
DatagramChannel tunnel = DatagramChannel.open();
// Connect to the server,localhost is used for demonstration only.
mServerAddress="";//some of the vpn ip address here
mServerPort="1723";
InetSocketAddress server = new InetSocketAddress(mServerAddress,Integer.parseInt(mServerPort) );
tunnel.connect(server);
// For simplicity,we use the same thread for both reading and
// writing. Here we put the tunnel into non-blocking mode.
tunnel.configureBlocking(false);
// Authenticate and configure the virtual network interface.
handshake(tunnel);
//d. Protect this socket,so package send by it will not be Feedback to the vpn service.
protect(tunnel.socket());
int timer = 0;
//e. Use a loop to pass packets.
while (true) {
//get packet with in
//put packet to tunnel
//get packet form tunnel
//return packet with out
//sleep is a must
// Assume that we did not make any progress in this iteration.
boolean idle = true;
// Read the outgoing packet from the input stream.
int length = in.read(packet.array());
if (length > 0) {
// Write the outgoing packet to the tunnel.
packet.limit(length);
tunnel.write(packet);
packet.clear();
// There might be more outgoing packets.
idle = false;
// If we were receiving,switch to sending.
if (timer < 1) {
timer = 1;
}
}
// Read the incoming packet from the tunnel.
length = tunnel.read(packet);
if (length > 0) {
// Ignore control messages,which start with zero.
if (packet.get(0) != 0) {
// Write the incoming packet to the output stream.
out.write(packet.array(),length);
}
packet.clear();
// There might be more incoming packets.
idle = false;
// If we were sending,switch to receiving.
if (timer > 0) {
timer = 0;
}
}
// If we are idle or waiting for the network,sleep for a
// fraction of time to avoid busy looping.
if (idle) {
Thread.sleep(100);
// Increase the timer. This is inaccurate but good enough,// since everything is operated in non-blocking mode.
timer += (timer > 0) ? 100 : -100;
// We are receiving for a long time but not sending.
if (timer < -15000) {
// Send empty control messages.
packet.put((byte) 0).limit(1);
for (int i = 0; i < 3; ++i) {
packet.position(0);
tunnel.write(packet);
}
packet.clear();
// Switch to sending.
timer = 1;
}
// We are sending for a long time but not receiving.
//if (timer > 20000) {
// throw new IllegalStateException("Timed out");
//}
}
}
} catch (Exception e) {
// Catch any exception
e.printStackTrace();
} finally {
try {
if (mInterface != null) {
mInterface.close();
mInterface = null;
}
} catch (Exception e) {
}
}
}
private void handshake(DatagramChannel tunnel) throws Exception {
// To build a secured tunnel,we should perform mutual authentication
// and exchange session keys for encryption. To keep things simple in
// this demo,we just send the shared secret in plaintext and wait
// for the server to send the parameters.
// Allocate the buffer for handshaking.
ByteBuffer packet = ByteBuffer.allocate(1024);
// Control messages always start with zero.
String password = "";//vpn password here
packet.put((byte) 0).put(password.getBytes()).flip();
// Send the secret several times in case of packet loss.
for (int i = 0; i < 3; ++i) {
Log.e("packetsdata",packet.toString());
packet.position(0);
tunnel.write(packet);
}
packet.clear();
// Wait for the parameters within a limited time.
for (int i = 0; i < 50; ++i) {
Thread.sleep(100);
// Normally we should not receive random packets.
int length = tunnel.read(packet);
if (length > 0 && packet.get(0) == 0) {
configure(new String(packet.array(),1,length - 1).trim());
return;
}
}
//throw new IllegalStateException("Timed out");
}
private void configure(String parameters) throws Exception {
// If the old interface has exactly the same parameters,use it!
if (mInterface != null) {
Log.i(TAG,"Using the prevIoUs interface");
return;
}
// Configure a builder while parsing the parameters.
Builder builder = new Builder();
for (String parameter : parameters.split(" ")) {
String[] fields = parameter.split(",");
try {
switch (fields[0].charAt(0)) {
case 'm':
builder.setMtu(Short.parseShort(fields[1]));
break;
case 'a':
builder.addAddress(fields[1],Integer.parseInt(fields[2]));
break;
case 'r':
builder.addRoute(fields[1],Integer.parseInt(fields[2]));
break;
case 'd':
builder.addDnsServer(fields[1]);
break;
case 's':
builder.addSearchDomain(fields[1]);
break;
}
} catch (Exception e) {
throw new IllegalArgumentException("Bad parameter: " + parameter);
}
}
// Close the old interface since the parameters have been changed.
try {
mInterface.close();
} catch (Exception e) {
// ignore
}
// Create a new interface using the builder and save the parameters.
mInterface = builder.setSession(mServerAddress)
.setConfigureIntent(mConfigureIntent)
.establish();
mParameters = parameters;
Log.i(TAG,"New interface: " + parameters);
}
}
这是我如何使用上面的类
private Thread mThread;
/*
* Services interface
* */
@Override
public int onStartCommand(Intent intent,int flags,int startId) {
// Start a new session by creating a new thread.
mThread = new Thread(this,"VpnRunnable");
//start the service
mThread.start();
/*
*service is left "started" and will later be restarted by the system
* http://android-developers.blogspot.com.au/2010/02/service-api-changes-starting-with.html
*/
return START_STICKY;
}
@Override
public void onDestroy() {
if (mThread != null) {
mThread.interrupt();
}
super.onDestroy();
}
@Override
public synchronized void run() {
/*
* to run the vpn interface call the vclRun method inside VCL class
* */
this.vclRun();
}
解决方法
首先,检查是否有字节被发送到您的Android设备.如果没有什么可以收到的话,它不会读任何东西.
然后看看这个,因为它可能会弄乱你的连接.
您需要将其包含在onStartCommand中：
// The handler is only used to show messages.
if (mHandler == null) {
mHandler = new Handler(this);
}
// Stop the prevIoUs session by interrupting the thread.
if (mThread != null) {
mThread.interrupt();
}
// Extract information from the intent.
String prefix = getPackageName();
mServerAddress = intent.getStringExtra(prefix + ".ADDRESS");
mServerPort = intent.getStringExtra(prefix + ".PORT");
mSharedSecret = intent.getStringExtra(prefix + ".SECRET").getBytes();
// Start a new session by creating a new thread.
mThread = new Thread(this,"ToyVpnThread");
mThread.start();
return START_STICKY;
还有同步void的细节(如下所示).
@Override
public synchronized void run() {
try {
Log.i(TAG,"Starting");
// If anything needs to be obtained using the network,get it now.
// This greatly reduces the complexity of seamless handover,which
// tries to recreate the tunnel without shutting down everything.
// In this demo,all we need to know is the server address.
InetSocketAddress server = new InetSocketAddress(
mServerAddress,Integer.parseInt(mServerPort));
// We try to create the tunnel for several times. The better way
// is to work with ConnectivityManager,such as trying only when
// the network is avaiable. Here we just use a counter to keep
// things simple.
for (int attempt = 0; attempt < 10; ++attempt) {
mHandler.sendEmptyMessage(R.string.connecting);
// Reset the counter if we were connected.
// See BELOW
if (run(server)) {
attempt = 0;
}
// Sleep for a while. This also checks if we got interrupted.
Thread.sleep(3000);
} /..../
你不是很好地管理你的线程操作.建议您在尝试运行之前接收需要接收的任何字节.那样做不会造成问题.
我会回覆你的代码,把你拿出来的东西放在一起.
我也建议你在这里改变你的代码：
packet.put((byte) 0).put(password.getBytes()).flip();
尝试使用显式编码：
packet.put((byte) 0).put(password.getBytes("UTF-8")).flip();
由于数据丢失,没有它.看到这个答案：
https://stackoverflow.com/a/7947911/3956566
我已经检查,您的项目正在使用“UTF-8”.
让我知道如果这没有帮助.
