src/frontends/android/app/src/main/java/org/strongswan/android/logic/imc/attributes/InstalledPackagesAttribute.java

   1 /*
   2  * Copyright (C) 2013 Tobias Brunner
   3  * Copyright (C) 2012 Christoph Buehler
   4  * Copyright (C) 2012 Patrick Loetscher
   5  *
   6  * Copyright (C) secunet Security Networks AG
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2 of the License, or (at your
  11  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16  * for more details.
  17  */
  18
  19 package org.strongswan.android.logic.imc.attributes;
  20
  21 import java.util.LinkedList;
  22
  23 import org.strongswan.android.utils.BufferedByteWriter;
  24
  25 import android.util.Pair;
  26
  27 /**
  28  * PA-TNC Installed Packages attribute (see section 4.2.7 of RFC 5792)
  29  *
  30  *                       1                   2                   3
  31  *   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
  32  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  33  *  |          Reserved             |         Package Count         |
  34  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  35  *  | Pkg Name Len  |        Package Name (Variable Length)         |
  36  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  37  *  |  Version Len  |    Package Version Number (Variable Length)   |
  38  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  39  */
  40 public class InstalledPackagesAttribute implements Attribute
  41 {
  42         private final short RESERVED = 0;
  43         private final LinkedList<Pair<String, String>> mPackages = new LinkedList<Pair<String, String>>();
  44
  45         /**
  46          * Add an installed package to this attribute.
  47          * @param name name of the package
  48          * @param version version number of the package
  49          */
  50         public void addPackage(String name, String version)
  51         {
  52                 mPackages.add(new Pair<String, String>(name, version));
  53         }
  54
  55         @Override
  56         public byte[] getEncoding()
  57         {
  58                 BufferedByteWriter writer = new BufferedByteWriter();
  59                 writer.put16(RESERVED);
  60                 writer.put16((short)mPackages.size());
  61                 for (Pair<String, String> pair : mPackages)
  62                 {
  63                         writer.putLen8(pair.first.getBytes());
  64                         writer.putLen8(pair.second.getBytes());
  65                 }
  66                 return writer.toByteArray();
  67         }
  68 }