NetStat.java

/* (C) 2012 Pragmatic Software
   This Source Code Form is subject to the terms of the Mozilla Public
   License, v. 2.0. If a copy of the MPL was not distributed with this
   file, You can obtain one at http://mozilla.org/MPL/2.0/
 */

package com.googlecode.networklog;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.PrintStream;
import java.util.HashMap;
import java.util.ArrayList;

import android.util.Log;

public class NetStat {
  final String states[] = { "ESTBLSH",   "SYNSENT",   "SYNRECV",   "FWAIT1",   "FWAIT2",   "TMEWAIT",
    "CLOSED",    "CLSWAIT",   "LASTACK",   "LISTEN",   "CLOSING",  "UNKNOWN"
  };

  public class Connection {
    String src;
    String spt;
    String dst;
    String dpt;
    String uid;
  }

  ArrayList<Connection> connections;

  public NetStat() {
    connections = new ArrayList<Connection>();
  }

  private final String getAddress(final String hexa) {
    try {
      final long v = Long.parseLong(hexa, 16);
      final long adr = (v >>> 24) | (v << 24) |
        ((v << 8) & 0x00FF0000) | ((v >> 8) & 0x0000FF00);
      return ((adr >> 24) & 0xff) + "." + ((adr >> 16) & 0xff) + "." + ((adr >> 8) & 0xff) + "." + (adr & 0xff);
    } catch(Exception e) {
      Log.w("NetworkLog", e.toString(), e);
      return "-1.-1.-1.-1";
    }
  }

  private final String getAddress6(final String hexa) {
    try {
      final String ip4[] = hexa.split("0000000000000000FFFF0000");

      if(ip4.length == 2) {
        final long v = Long.parseLong(ip4[1], 16);
        final long adr = (v >>> 24) | (v << 24) |
          ((v << 8) & 0x00FF0000) | ((v >> 8) & 0x0000FF00);
        return ((adr >> 24) & 0xff) + "." + ((adr >> 16) & 0xff) + "." + ((adr >> 8) & 0xff) + "." + (adr & 0xff);
      } else {
        return "-2.-2.-2.-2";
      }
    } catch(Exception e) {
      Log.w("NetworkLog", e.toString(), e);
      return "-1.-1.-1.-1";
    }
  }

  private final int getInt16(final String hexa) {
    try {
      return Integer.parseInt(hexa, 16);
    } catch(Exception e) {
      Log.w("NetworkLog", e.toString(), e);
      return -1;
    }
  }

  public ArrayList<Connection> getConnections() {
    connections.clear();
    try {
      BufferedReader in = new BufferedReader(new FileReader("/proc/" + android.os.Process.myPid() + "/net/tcp"));
      String line;

      while((line = in.readLine()) != null) {
        line = line.trim();
        if(MyLog.enabled && MyLog.level >= 5) {
          MyLog.d(5, "Netstat: " + line);
        }
        String[] fields = line.split("\\s+", 10);
        int fieldn = 0;

        if(MyLog.enabled && MyLog.level >= 9) {
          for(String field : fields) {
            MyLog.d(9, "Field " + (fieldn++) + ": [" + field + "]");
          }
        }

        if(fields[0].equals("sl")) {
          continue;
        }

        Connection connection = new Connection();

        String src[] = fields[1].split(":", 2);
        String dst[] = fields[2].split(":", 2);

        connection.src = getAddress(src[0]);
        connection.spt = String.valueOf(getInt16(src[1]));
        connection.dst = getAddress(dst[0]);
        connection.dpt = String.valueOf(getInt16(dst[1]));
        connection.uid = fields[7];

        connections.add(connection);
      }

      in.close();

      in = new BufferedReader(new FileReader("/proc/" + android.os.Process.myPid() + "/net/udp"));

      while((line = in.readLine()) != null) {
        line = line.trim();
        if(MyLog.enabled && MyLog.level >= 5) {
          MyLog.d(5, "Netstat: " + line);
        }
        String[] fields = line.split("\\s+", 10);
        int fieldn = 0;

        if(MyLog.enabled && MyLog.level >= 9) {
          for(String field : fields) {
            MyLog.d(9, "Field " + (fieldn++) + ": [" + field + "]");
          }
        }

        if(fields[0].equals("sl")) {
          continue;
        }

        Connection connection = new Connection();

        String src[] = fields[1].split(":", 2);
        String dst[] = fields[2].split(":", 2);

        connection.src = getAddress(src[0]);
        connection.spt = String.valueOf(getInt16(src[1]));
        connection.dst = getAddress(dst[0]);
        connection.dpt = String.valueOf(getInt16(dst[1]));
        connection.uid = fields[7];

        connections.add(connection);
      }

      in.close();

      in = new BufferedReader(new FileReader("/proc/" + android.os.Process.myPid() + "/net/tcp6"));

      while((line = in.readLine()) != null) {
        line = line.trim();
        if(MyLog.enabled && MyLog.level >= 5) {
          MyLog.d(5, "Netstat: " + line);
        }
        String[] fields = line.split("\\s+", 10);
        int fieldn = 0;

        if(MyLog.enabled && MyLog.level >= 9) {
          for(String field : fields) {
            MyLog.d(9, "Field " + (fieldn++) + ": [" + field + "]");
          }
        }

        if(fields[0].equals("sl")) {
          continue;
        }

        Connection connection = new Connection();

        String src[] = fields[1].split(":", 2);
        String dst[] = fields[2].split(":", 2);

        connection.src = getAddress6(src[0]);
        connection.spt = String.valueOf(getInt16(src[1]));
        connection.dst = getAddress6(dst[0]);
        connection.dpt = String.valueOf(getInt16(dst[1]));
        connection.uid = fields[7];

        connections.add(connection);
      }

      in.close();

      in = new BufferedReader(new FileReader("/proc/" + android.os.Process.myPid() + "/net/udp6"));

      while((line = in.readLine()) != null) {
        line = line.trim();
        if(MyLog.enabled && MyLog.level >= 5) {
          MyLog.d(5, "Netstat: " + line);
        }
        String[] fields = line.split("\\s+", 10);
        int fieldn = 0;

        if(MyLog.enabled && MyLog.level >= 9) {
          for(String field : fields) {
            MyLog.d(9, "Field " + (fieldn++) + ": [" + field + "]");
          }
        }

        if(fields[0].equals("sl")) {
          continue;
        }

        Connection connection = new Connection();

        String src[] = fields[1].split(":", 2);
        String dst[] = fields[2].split(":", 2);

        connection.src = getAddress6(src[0]);
        connection.spt = String.valueOf(getInt16(src[1]));
        connection.dst = getAddress6(dst[0]);
        connection.dpt = String.valueOf(getInt16(dst[1]));
        connection.uid = fields[7];

        connections.add(connection);
      }

      in.close();
    } catch(Exception e) {
      Log.w("NetworkLog", e.toString(), e);
    }

    return connections;
  }
}