我的Android应用程序使用TCPDump时出现问题。 它应该从tcpdump逐行读取输出并在我的应用程序中处理它。
问题是:
有时代码工作正常,它立即读取捕获的数据包。但有时,ReadLine会阻塞,直到我从Linux控制台(killall tcpdump)中终止tcpdump进程。这样做后,我的循环是处理每一行(有时10,有时1或2) - 这意味着,readLine应该工作,但没有。
我读了类似的问题,但没有找到任何解决方案,这个问题...
谢谢!TCPDump-Buffer上的ReadLine有时会阻塞直到kill tcpdump
public class ListenActivity extends Activity {
static ArrayList<Packet> packetBuffer = new ArrayList<Packet>();
static Process tcpDumpProcess = null;
static ListenThread thread = null;
public static final String TCPDUMP_COMMAND = "tcpdump -A -s0 | grep -i -e 'Cookie'\n";
private InputStream inputStream = null;
private OutputStream outputStream = null;
@Override
protected void onStart() {
super.onStart();
try {
tcpDumpProcess = new ProcessBuilder().command("su").redirectErrorStream(true).start();
inputStream = tcpDumpProcess.getInputStream();
outputStream = tcpDumpProcess.getOutputStream();
outputStream.write(TCPDUMP_COMMAND.getBytes("ASCII"));
} catch (Exception e) {
Log.e("FSE", "", e);
}
thread = new ListenThread(new BufferedReader(new InputStreamReader(inputStream)));
thread.start();
}
private class ListenThread extends Thread {
public ListenThread(BufferedReader reader) {
this.reader = reader;
}
private BufferedReader reader = null;
@Override
public void run() {
reader = new BufferedReader(new InputStreamReader(inputStream));
while (true) {
try {
String received = reader.readLine();
Log.d("FS", received);
Packet pReceived = Packet.analyze(received);
if (pReceived != null) {
packetBuffer.add(pReceived);
}
} catch (Exception e) {
Log.e("FSE", "", e);
}
}
}
}
}
你有没有直接使用[jnetpcap](http://jnetpcap.com/)的原因?读取另一个进程的输出结果似乎要解决您的问题还有很长的路要走。 – sarnold 2011-04-19 10:21:11
说实话,我并不了解jnetpcap :-)这看起来像我需要的东西......我正在深入研究它,并尝试查明它是否已成功编译为Android-ARM。谢谢!! – andreas911 2011-04-19 12:46:08