/*
* Copyright (C) 2012,2013 Scuola Superiore Sant'Anna (http://www.sssup.it)
* and Consorzio Nazionale Interuniversitario per le Telecomunicazioni
* (http://www.cnit.it).
*
* This file is part of Sniffer 15.4, an IEEE 802.15.4 packet sniffer for
* Android devices.
*
* Sniffer 15.4 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Sniffer 15.4 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Sniffer 15.4. If not, see <http://www.gnu.org/licenses/>.
*/
package it.sssup.rtn.sniffer154.storage;
import it.sssup.rtn.sniffer154.AppSniffer154;
import it.sssup.rtn.sniffer154.R;
import it.sssup.rtn.sniffer154.dissecting.Packet80215;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.text.Editable;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class PcapExporter extends Activity {
// private final static int LINKTYPE_IEEE802_15_4 = 195;
// TODO add an option for FCS packets
private final static int LINKTYPE_IEEE802_15_4_NOFCS = 230;
private static final String TAG = "PCAPFILEMANAGER";
private static final String PCAPEXT = ".pcap";
private static Uri sessionUri = Uri.EMPTY;
private int sessionDateBase;
public Cursor cursor;
private class GlobalHeader {
static final int magic_number = 0xa1b2c3d4; /* magic number */
static final short version_major = 2;
static final short version_minor = 4;
static final int thiszone = 0; /* GMT to local correction */
static final int sigfigs = 0; /* accuracy of timestamps */
static final int snaplen = 65535; /*
* max length of captured packets, in
* octets
*/
}
@Override
protected void onCreate(Bundle savedInstanceState) {
// Be sure to call the super class.
super.onCreate(savedInstanceState);
Log.d(TAG, "onCreate()");
setContentView(R.layout.exporter);
final Button saveButton = (Button) findViewById(R.id.buttonExport);
AppSniffer154 app = (AppSniffer154) getApplication();
sessionUri = app.getSessionUri();
Cursor sessionC = getContentResolver().query(sessionUri, null, null,
null, null);
if (sessionC == null || !sessionC.moveToFirst()) {
toastMessage("Error, Cannot find the session date");
saveButton.setEnabled(false);
return;
}
long sessionDate = sessionC.getLong(sessionC
.getColumnIndex(SessionTable.C_SESSION_DATE));
sessionDateBase = (int) (sessionDate / 1000);
Uri uri = Uri.withAppendedPath(sessionUri,
PacketContentProvider.BASE_PATH_PACKETS + "/"
+ PacketContentProvider.BASE_PATH_FILTERED);
cursor = getContentResolver().query(uri, null, null, null, null);
if (cursor == null) {
saveButton.setEnabled(false);
}
saveButton.setEnabled(true);
saveButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
saveClicked(v);
}
});
}
private void saveClicked(View v) {
Log.d(TAG, "exportListButton()");
exportList();
}
private void writeGlobalHeader(DataOutputStream dos, int LINKTYPE)
throws IOException {
dos.writeInt(GlobalHeader.magic_number);
dos.writeShort(GlobalHeader.version_major);
dos.writeShort(GlobalHeader.version_minor);
dos.writeInt(GlobalHeader.thiszone);
dos.writeInt(GlobalHeader.sigfigs);
dos.writeInt(GlobalHeader.snaplen);
dos.writeInt(LINKTYPE);
}
private void writeRecord(DataOutputStream dos, Packet80215 pack, long ts)
throws IOException {
int secOffset = (int) (ts / 1000);
int us = ((int) (ts % 1000)) * 1000;
dos.writeInt(secOffset + sessionDateBase);
dos.writeInt(us);
dos.writeInt(pack.getRaw().length);
dos.writeInt(pack.getRaw().length);
dos.write(pack.getRaw());
}
private void toastMessage(String mess) {
Toast toast = Toast.makeText(getApplicationContext(), mess, Toast.LENGTH_LONG);
toast.show();
}
private void exportList() {
Log.d(TAG, "ExportList");
if (!cursor.moveToFirst()) { // empty list
toastMessage("Empty list");
return;
}
EditText e = (EditText) findViewById(R.id.editText1);
long sessionID = cursor.getLong(cursor
.getColumnIndex(PacketTable.C_PACKET_SESSION));
String fileName = "Session" + Long.toString(sessionID);
Editable s = e.getText();
if (!s.toString().equals("")) {
fileName = s.toString();
}
String fullFileName = fileName + PCAPEXT;
File dir = new File(Environment.getExternalStorageDirectory()
+ "/sniffer154/");
dir.mkdirs();
File file = new File(dir, fullFileName);
try {
file.createNewFile();
if (!file.canWrite()) {
Log.d(TAG, "cannot write");
toastMessage("Error writing to file");
return;
}
if (!file.exists()) {
Log.d(TAG, "not exists");
toastMessage("Unable to create file");
return;
}
FileOutputStream fos;
fos = new FileOutputStream(file);
DataOutputStream dos = new DataOutputStream(fos);
int linktype = LINKTYPE_IEEE802_15_4_NOFCS;
writeGlobalHeader(dos, linktype);
do {
byte[] packet = cursor.getBlob(cursor
.getColumnIndex(PacketTable.C_PACKET_PAYLOAD));
Packet80215 pack = Packet80215.create(packet);
long tsOffset = cursor.getLong(cursor
.getColumnIndex(PacketTable.C_PACKET_DATE));
if (pack == null) {
toastMessage("Error parsing packet");
return;
}
Log.d(TAG, "Exporting " + pack.getType());
writeRecord(dos, pack, tsOffset);
} while (cursor.moveToNext());
dos.close();
toastMessage("File " + fullFileName + " saved");
} catch (FileNotFoundException e1) {
Log.d(TAG, "FileNotFound");
toastMessage("File not found");
e1.printStackTrace();
return;
} catch (IOException e2) {
Log.d(TAG, "IOException");
toastMessage("Error writing to file");
e2.printStackTrace();
}
}
}
