/**
* Copyright (C) 2011 Whisper Systems
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.securecomcode.text.mms;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteException;
import android.net.ConnectivityManager;
import android.util.Log;
import com.securecomcode.text.database.ApnDatabase;
import com.securecomcode.text.database.DatabaseFactory;
import com.securecomcode.text.util.TelephonyUtil;
import com.securecomcode.text.util.TextSecurePreferences;
import org.whispersystems.textsecure.util.Conversions;
import org.whispersystems.textsecure.util.Util;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
public class MmsCommunication {
private static final String TAG = "MmsCommunication";
protected static MmsConnectionParameters getLocallyConfiguredMmsConnectionParameters(Context context)
throws ApnUnavailableException
{
if (TextSecurePreferences.isUseLocalApnsEnabled(context)) {
String mmsc = TextSecurePreferences.getMmscUrl(context);
if (mmsc == null)
throw new ApnUnavailableException("Malformed locally configured MMSC.");
if (!mmsc.startsWith("http"))
mmsc = "http://" + mmsc;
String proxy = TextSecurePreferences.getMmscProxy(context);
String port = TextSecurePreferences.getMmscProxyPort(context);
return new MmsConnectionParameters(mmsc, proxy, port);
}
throw new ApnUnavailableException("No locally configured parameters available");
}
protected static MmsConnectionParameters getLocalMmsConnectionParameters(Context context)
throws ApnUnavailableException
{
if (TextSecurePreferences.isUseLocalApnsEnabled(context)) {
return getLocallyConfiguredMmsConnectionParameters(context);
} else {
try {
MmsConnectionParameters params = ApnDatabase.getInstance(context)
.getMmsConnectionParameters(TelephonyUtil.getMccMnc(context),
TelephonyUtil.getApn(context));
if (params == null) {
throw new ApnUnavailableException("No parameters available from ApnDefaults.");
}
return params;
} catch (IOException ioe) {
throw new ApnUnavailableException("ApnDatabase threw an IOException", ioe);
}
}
}
protected static MmsConnectionParameters getMmsConnectionParameters(Context context, String apn)
throws ApnUnavailableException
{
Log.w(TAG, "Getting MMSC params for apn " + apn);
Cursor cursor = null;
try {
cursor = DatabaseFactory.getMmsDatabase(context).getCarrierMmsInformation(apn);
if (cursor == null || !cursor.moveToFirst()) {
Log.w(TAG, "Android didn't have a result, querying local parameters.");
return getLocalMmsConnectionParameters(context);
}
do {
String mmsc = cursor.getString(cursor.getColumnIndexOrThrow("mmsc"));
String proxy = cursor.getString(cursor.getColumnIndexOrThrow("mmsproxy"));
String port = cursor.getString(cursor.getColumnIndexOrThrow("mmsport"));
if (!Util.isEmpty(mmsc)) {
Log.w(TAG, "Using Android-provided MMSC parameters.");
return new MmsConnectionParameters(mmsc, proxy, port);
}
} while (cursor.moveToNext());
Log.w(TAG, "Android provided results were empty, querying local parameters.");
return getLocalMmsConnectionParameters(context);
} catch (SQLiteException sqe) {
Log.w(TAG, sqe);
} catch (SecurityException se) {
Log.w(TAG, "Android won't let us query the APN database.");
return getLocalMmsConnectionParameters(context);
} catch (IllegalArgumentException iae) {
Log.w(TAG, iae);
} finally {
if (cursor != null)
cursor.close();
}
return getLocalMmsConnectionParameters(context);
}
protected static boolean checkRouteToHost(Context context, String host, boolean usingMmsRadio)
throws IOException
{
InetAddress inetAddress = InetAddress.getByName(host);
if (!usingMmsRadio) {
if (inetAddress.isSiteLocalAddress()) {
throw new IOException("RFC1918 address in non-MMS radio situation!");
}
return true;
}
Log.w(TAG, "Checking route to address: " + host + " , " + inetAddress.getHostAddress());
byte[] ipAddressBytes = inetAddress.getAddress();
if (ipAddressBytes != null && ipAddressBytes.length == 4) {
int ipAddress = Conversions.byteArrayToIntLittleEndian(ipAddressBytes, 0);
ConnectivityManager manager = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
return manager.requestRouteToHost(MmsRadio.TYPE_MOBILE_MMS, ipAddress);
}
return true;
}
protected static byte[] parseResponse(InputStream is) throws IOException {
InputStream in = new BufferedInputStream(is);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
Util.copy(in, baos);
Log.w(TAG, "Received full server response, " + baos.size() + " bytes");
return baos.toByteArray();
}
protected static HttpURLConnection constructHttpClient(String urlString, String proxy, int port)
throws IOException
{
HttpURLConnection urlConnection;
URL url = new URL(urlString);
if (proxy != null) {
Log.w(TAG, String.format("Constructing http client using a proxy: (%s:%d)", proxy, port));
Proxy proxyRoute = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxy, port));
urlConnection = (HttpURLConnection) url.openConnection(proxyRoute);
} else {
Log.w(TAG, "Constructing http client without proxy");
urlConnection = (HttpURLConnection) url.openConnection();
}
urlConnection.setConnectTimeout(20*1000);
urlConnection.setReadTimeout(20*1000);
urlConnection.setUseCaches(false);
urlConnection.setRequestProperty("User-Agent", "Android-Mms/2.0");
urlConnection.setRequestProperty("Accept-Charset", "UTF-8");
return urlConnection;
}
public static class MmsConnectionParameters {
public class Apn {
private final String mmsc;
private final String proxy;
private final String port;
public Apn(String mmsc, String proxy, String port) {
this.mmsc = mmsc;
this.proxy = proxy;
this.port = port;
}
public boolean hasProxy() {
return !Util.isEmpty(proxy);
}
public String getMmsc() {
return mmsc;
}
public String getProxy() {
if (!hasProxy())
return null;
return proxy;
}
public int getPort() {
if (Util.isEmpty(port))
return 80;
return Integer.parseInt(port);
}
@Override
public String toString() {
return MmsConnectionParameters.class.getSimpleName() +
"{ mmsc: \"" + mmsc + "\"" +
", proxy: " + (proxy == null ? "none" : '"' + proxy + '"') +
", port: " + (port == null ? "none" : port) + " }";
}
}
private List<Apn> apn = new ArrayList<Apn>();
public MmsConnectionParameters(String mmsc, String proxy, String port) {
apn.add(new Apn(mmsc, proxy, port));
}
public MmsConnectionParameters add(String mmsc, String proxy, String port) {
apn.add(new Apn(mmsc, proxy, port));
return this;
}
public List<Apn> get() {
return apn;
}
}
}