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