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update logic for bridge selection

This commit is contained in:
Nathan Freitas 2017-03-22 12:47:05 -04:00
parent 301ef3948e
commit 4af61b609e
1 changed files with 112 additions and 50 deletions
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146
orbotservice/src/main/java/org/torproject/android/service/TorService.java
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@ -61,15 +61,18 @@ import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.text.Normalizer;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;
import java.util.Random;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.concurrent.ExecutorService;
@ -132,6 +135,9 @@ public class TorService extends Service implements TorServiceConstants, OrbotCon
private Shell mShellPolipo;
private ArrayList<Bridge> alBridges = null;
private static final Uri HS_CONTENT_URI = Uri.parse("content://org.torproject.android.ui.hiddenservices.providers/hs");
private static final Uri COOKIE_CONTENT_URI = Uri.parse("content://org.torproject.android.ui.hiddenservices.providers.cookie/cookie");
@ -1666,30 +1672,28 @@ public class TorService extends Service implements TorServiceConstants, OrbotCon
else
{
loadBridgeDefaults ();
extraLines.append("UseBridges 1").append('\n');
String bridgeList = new String(Prefs.getBridgesList().getBytes("ISO-8859-1"));
boolean obfsBridges = bridgeList.contains("obfs3")||bridgeList.contains("obfs4");
boolean meekBridges = bridgeList.contains("meek");
if (bridgeList != null && bridgeList.length() > 1) //longer then 1 = some real values here
//check if any PT bridges are needed
if (obfsBridges)
{
extraLines.append("ClientTransportPlugin obfs3 exec " + fileObfsclient.getCanonicalPath()).append('\n');
extraLines.append("ClientTransportPlugin obfs4 exec " + fileObfsclient.getCanonicalPath()).append('\n');
}
//check if any PT bridges are needed
boolean obfsBridges = bridgeList.contains("obfs3")||bridgeList.contains("obfs4")||bridgeList.contains("scramblesuit");
if (obfsBridges)
{
extraLines.append("ClientTransportPlugin obfs3 exec " + fileObfsclient.getCanonicalPath()).append('\n');
extraLines.append("ClientTransportPlugin obfs4 exec " + fileObfsclient.getCanonicalPath()).append('\n');
extraLines.append("ClientTransportPlugin scramblesuit exec " + fileObfsclient.getCanonicalPath()).append('\n');
}
boolean meekBridges = bridgeList.contains("meek");
if (meekBridges)
{
extraLines.append("ClientTransportPlugin meek_lite exec " + fileObfsclient.getCanonicalPath()).append('\n');
}
if (meekBridges)
{
extraLines.append("ClientTransportPlugin meek_lite exec " + fileObfsclient.getCanonicalPath()).append('\n');
}
if (bridgeList != null && bridgeList.length() > 5) //longer then 1 = some real values here
{
String[] bridgeListLines = bridgeList.split("\\r?\\n");
for (String bridgeConfigLine : bridgeListLines)
@ -1698,8 +1702,6 @@ public class TorService extends Service implements TorServiceConstants, OrbotCon
{
extraLines.append("Bridge ");
//bridgeConfigLine = bridgeConfigLine.replace('<27>', ' ');
StringTokenizer st = new StringTokenizer (bridgeConfigLine," ");
while (st.hasMoreTokens())
extraLines.append(st.nextToken()).append(' ');
@ -1713,33 +1715,13 @@ public class TorService extends Service implements TorServiceConstants, OrbotCon
}
else
{
//time to do autobridges, aka meek
debug ("Using meek bridges");
String type = "obfs4";
// String bridgeConfig = "meek exec " + fileMeekclient.getCanonicalPath();
String bridgeConfig = "meek_lite exec " + fileObfsclient.getCanonicalPath();
if (meekBridges)
type = "meek_lite";
extraLines.append("ClientTransportPlugin" + ' ' + bridgeConfig).append('\n');
int meekIdx = 2; //let's use Azure by default
if (bridgeList != null && bridgeList.length() == 1)
{
try
{
meekIdx = Integer.parseInt(bridgeList);
if (meekIdx+1 > BRIDGES_MEEK.length)
throw new Exception("not valid meek idx");
}
catch (Exception e)
{
debug("invalid meek type; please enter 0=Google, 1=AWS, 2=Azure");
}
}
extraLines.append("Bridge " + BRIDGES_MEEK[meekIdx]).append('\n');
getBridges(type,extraLines);
}
@ -2063,4 +2045,84 @@ public class TorService extends Service implements TorServiceConstants, OrbotCon
}
// for bridge loading from the assets default bridges.txt file
class Bridge
{
String type;
String config;
}
private void loadBridgeDefaults ()
{
if (alBridges == null)
{
alBridges = new ArrayList<Bridge>();
try
{
BufferedReader in=
new BufferedReader(new InputStreamReader(getAssets().open("bridges.txt"), "UTF-8"));
String str;
while ((str=in.readLine()) != null) {
StringTokenizer st = new StringTokenizer (str," ");
Bridge b = new Bridge();
b.type = st.nextToken();
StringBuffer sbConfig = new StringBuffer();
while(st.hasMoreTokens())
sbConfig.append(st.nextToken()).append(' ');
b.config = sbConfig.toString().trim();
alBridges.add(b);
}
in.close();
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
//we should randomly sort alBridges so we don't have the same bridge order each time
Random bridgeSelectRandom = new Random(System.nanoTime());
private void getBridges (String type, StringBuffer extraLines)
{
Collections.shuffle(alBridges, bridgeSelectRandom);
//let's just pull up to 2 bridges from the defaults at time
int maxBridges = 2;
int bridgeCount = 0;
//now go through the list to find the bridges we want
for (Bridge b : alBridges)
{
if (b.type.equals(type))
{
extraLines.append("Bridge ");
extraLines.append(b.type);
extraLines.append(' ');
extraLines.append(b.config);
extraLines.append('\n');
bridgeCount++;
if (bridgeCount > maxBridges)
break;
}
}
}
}