From 3a409ed35f0f26644d99b8704801103de8783864 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Parm=C3=A9nides=20GV?= <parmegv@sdf.org>
Date: Sat, 2 Apr 2016 12:40:10 +0200
Subject: Update ics-openvpn

---
 .../de/blinkt/openvpn/core/LogFileHandler.java     | 62 ++++++++++++++++------
 1 file changed, 47 insertions(+), 15 deletions(-)

(limited to 'app/src/main/java/de/blinkt/openvpn/core/LogFileHandler.java')

diff --git a/app/src/main/java/de/blinkt/openvpn/core/LogFileHandler.java b/app/src/main/java/de/blinkt/openvpn/core/LogFileHandler.java
index 5c1741d9..288c7934 100644
--- a/app/src/main/java/de/blinkt/openvpn/core/LogFileHandler.java
+++ b/app/src/main/java/de/blinkt/openvpn/core/LogFileHandler.java
@@ -11,12 +11,15 @@ import android.os.Message;
 import android.os.Parcel;
 
 import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.Locale;
+
+import se.leap.bitmaskclient.R;
 
 /**
  * Created by arne on 23.01.16.
@@ -27,7 +30,6 @@ class LogFileHandler extends Handler {
     static final int LOG_INIT = 102;
     public static final int LOG_MESSAGE = 103;
     private static FileOutputStream mLogFile;
-    private static BufferedOutputStream mBufLogfile;
 
     public static final String LOGFILE_NAME = "logcache.dat";
 
@@ -41,6 +43,8 @@ class LogFileHandler extends Handler {
     public void handleMessage(Message msg) {
         try {
             if (msg.what == LOG_INIT) {
+                if (mLogFile != null)
+                    throw new RuntimeException("mLogFile not null");
                 readLogCache((File) msg.obj);
                 openLogFile((File) msg.obj);
             } else if (msg.what == LOG_MESSAGE && msg.obj instanceof VpnStatus.LogItem) {
@@ -70,15 +74,13 @@ class LogFileHandler extends Handler {
 
     private static void trimLogFile() {
         try {
-            mBufLogfile.flush();
+            mLogFile.flush();
             mLogFile.getChannel().truncate(0);
-
         } catch (IOException e) {
             e.printStackTrace();
         }
     }
 
-
     private void writeLogItemToDisk(VpnStatus.LogItem li) throws IOException {
         Parcel p = Parcel.obtain();
         li.writeToParcel(p, 0);
@@ -86,8 +88,8 @@ class LogFileHandler extends Handler {
         // write binary format to disc
         byte[] liBytes = p.marshall();
 
-        mLogFile.write(liBytes.length & 0xff);
-        mLogFile.write(liBytes.length >> 8);
+        byte[] lenBytes = ByteBuffer.allocate(4).putInt(liBytes.length).array();
+        mLogFile.write(lenBytes);
         mLogFile.write(liBytes);
         p.recycle();
     }
@@ -95,39 +97,56 @@ class LogFileHandler extends Handler {
     private void openLogFile (File cacheDir) throws FileNotFoundException {
         File logfile = new File(cacheDir, LOGFILE_NAME);
         mLogFile = new FileOutputStream(logfile);
-        mBufLogfile = new BufferedOutputStream(mLogFile);
     }
 
     private void readLogCache(File cacheDir) {
         File logfile = new File(cacheDir, LOGFILE_NAME);
 
+
         if (!logfile.exists() || !logfile.canRead())
             return;
 
-        VpnStatus.logDebug("Reread log items from cache file");
+
 
         try {
+
             BufferedInputStream logFile = new BufferedInputStream(new FileInputStream(logfile));
 
             byte[] buf = new byte[8192];
-            int read = logFile.read(buf, 0, 2);
+            int read = logFile.read(buf, 0, 4);
+            int itemsRead=0;
 
-            while (read > 0) {
-                // Marshalled LogItem
-                int len = (0xff & buf[0]) | buf[1] << 8;
+            while (read >= 4) {
+                int len = ByteBuffer.wrap(buf, 0, 4).asIntBuffer().get();
 
+                // Marshalled LogItem
                 read = logFile.read(buf, 0, len);
 
                 Parcel p = Parcel.obtain();
                 p.unmarshall(buf, 0, read);
                 p.setDataPosition(0);
                 VpnStatus.LogItem li = VpnStatus.LogItem.CREATOR.createFromParcel(p);
-                VpnStatus.newLogItem(li, true);
+                if (li.verify()) {
+                    VpnStatus.newLogItem(li, true);
+                } else {
+                    VpnStatus.logError(String.format(Locale.getDefault(),
+                            "Could not read log item from file: %d/%d: %s",
+                            read, len, bytesToHex(buf, Math.max(read,80))));
+                }
                 p.recycle();
 
                 //Next item
-                read = logFile.read(buf, 0, 2);
+                read = logFile.read(buf, 0, 4);
+                itemsRead++;
+                if (itemsRead > 2*VpnStatus.MAXLOGENTRIES) {
+                    VpnStatus.logError("Too many logentries read from cache, aborting.");
+                    read = 0;
+                }
+
             }
+            VpnStatus.logDebug(R.string.reread_log, itemsRead);
+
+
 
         } catch (java.io.IOException | java.lang.RuntimeException e) {
             VpnStatus.logError("Reading cached logfile failed");
@@ -137,4 +156,17 @@ class LogFileHandler extends Handler {
         }
     }
 
+    final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();
+    public static String bytesToHex(byte[] bytes, int len) {
+        len = Math.min(bytes.length, len);
+        char[] hexChars = new char[len * 2];
+        for ( int j = 0; j < len; j++ ) {
+            int v = bytes[j] & 0xFF;
+            hexChars[j * 2] = hexArray[v >>> 4];
+            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
+        }
+        return new String(hexChars);
+    }
+
+
 }
-- 
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