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  23 <h1>protocol.cc</h1><a href="protocol_8cc.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">///</span>
  24 <a name="l00002"></a>00002 <span class="comment"></span><span class="comment">/// \file       protocol.cc</span>
  25 <a name="l00003"></a>00003 <span class="comment"></span><span class="comment">///             USB Blackberry bulk protocol API</span>
  26 <a name="l00004"></a>00004 <span class="comment"></span><span class="comment">///</span>
  27 <a name="l00005"></a>00005 <span class="comment"></span>
  28 <a name="l00006"></a>00006 <span class="comment">/*</span>
  29 <a name="l00007"></a>00007 <span class="comment">    Copyright (C) 2005-2011, Net Direct Inc. (http://www.netdirect.ca/)</span>
  30 <a name="l00008"></a>00008 <span class="comment"></span>
  31 <a name="l00009"></a>00009 <span class="comment">    This program is free software; you can redistribute it and/or modify</span>
  32 <a name="l00010"></a>00010 <span class="comment">    it under the terms of the GNU General Public License as published by</span>
  33 <a name="l00011"></a>00011 <span class="comment">    the Free Software Foundation; either version 2 of the License, or</span>
  34 <a name="l00012"></a>00012 <span class="comment">    (at your option) any later version.</span>
  35 <a name="l00013"></a>00013 <span class="comment"></span>
  36 <a name="l00014"></a>00014 <span class="comment">    This program is distributed in the hope that it will be useful,</span>
  37 <a name="l00015"></a>00015 <span class="comment">    but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
  38 <a name="l00016"></a>00016 <span class="comment">    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.</span>
  39 <a name="l00017"></a>00017 <span class="comment"></span>
  40 <a name="l00018"></a>00018 <span class="comment">    See the GNU General Public License in the COPYING file at the</span>
  41 <a name="l00019"></a>00019 <span class="comment">    root directory of this project for more details.</span>
  42 <a name="l00020"></a>00020 <span class="comment">*/</span>
  43 <a name="l00021"></a>00021
  44 <a name="l00022"></a>00022 <span class="preprocessor">#include "<a class="code" href="protocol_8h.html" title="USB Blackberry bulk protocol API constants.">protocol.h</a>"</span>
  45 <a name="l00023"></a>00023 <span class="preprocessor">#include "<a class="code" href="protostructs_8h.html" title="USB Blackberry bulk protocol API.">protostructs.h</a>"</span>
  46 <a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="data_8h.html" title="Class to deal with pre-saved data files.">data.h</a>"</span>
  47 <a name="l00025"></a>00025 <span class="preprocessor">#include "<a class="code" href="endian_8h.html" title="Endian conversion macros.">endian.h</a>"</span>
  48 <a name="l00026"></a>00026 <span class="preprocessor">#include "<a class="code" href="error_8h.html" title="Common exception classes for the Barry library.">error.h</a>"</span>
  49 <a name="l00027"></a>00027 <span class="preprocessor">#include "debug.h"</span>
  50 <a name="l00028"></a>00028
  51 <a name="l00029"></a>00029 <span class="preprocessor">#include &lt;sstream&gt;</span>
  52 <a name="l00030"></a>00030
  53 <a name="l00031"></a>00031 <span class="keyword">namespace </span>Barry { <span class="keyword">namespace </span>Protocol {
  54 <a name="l00032"></a>00032
  55 <a name="l00033"></a>00033 <span class="comment">// This function is only valid for Packet, JLPacket, and JVMPacket structs,</span>
  56 <a name="l00034"></a>00034 <span class="comment">// as long as they don't differ from each other in header layout, when</span>
  57 <a name="l00035"></a>00035 <span class="comment">// it comes to the .size field.  (see protostructs.h)</span>
  58 <a name="l00036"></a>00036 <span class="keywordtype">void</span> CheckSize(<span class="keyword">const</span> Data &amp;packet, <span class="keywordtype">size_t</span> requiredsize)
  59 <a name="l00037"></a>00037 {
  60 <a name="l00038"></a>00038         <span class="keyword">const</span> Packet *p = (<span class="keyword">const</span> Packet *) packet.GetData();
  61 <a name="l00039"></a>00039
  62 <a name="l00040"></a>00040         <span class="comment">// when packets are larger than 0xFFFF bytes, packet-&gt;size is no</span>
  63 <a name="l00041"></a>00041         <span class="comment">// longer reliable, so we go with the Data class size</span>
  64 <a name="l00042"></a>00042         <span class="keywordflow">if</span>( (packet.GetSize() &gt;= 4 &amp;&amp; btohs(p-&gt;size) != packet.GetSize() &amp;&amp; packet.GetSize() &lt;= 0xFFFF) ||
  65 <a name="l00043"></a>00043             packet.GetSize() &lt; requiredsize )
  66 <a name="l00044"></a>00044
  67 <a name="l00045"></a>00045         {
  68 <a name="l00046"></a>00046                 BadSize bs(packet.GetSize() &gt;= 4 ? btohs(p-&gt;size) : 0,
  69 <a name="l00047"></a>00047                         packet.GetSize(), requiredsize);
  70 <a name="l00048"></a>00048                 eout(bs.what());
  71 <a name="l00049"></a>00049                 eout(packet);
  72 <a name="l00050"></a>00050                 <span class="keywordflow">throw</span> bs;
  73 <a name="l00051"></a>00051         }
  74 <a name="l00052"></a>00052 }
  75 <a name="l00053"></a>00053
  76 <a name="l00054"></a>00054 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> GetSize(<span class="keyword">const</span> Data &amp;packet)
  77 <a name="l00055"></a>00055 {
  78 <a name="l00056"></a>00056         CheckSize(packet, 4);
  79 <a name="l00057"></a>00057
  80 <a name="l00058"></a>00058         <span class="comment">// when packets are larger than 0xFFFF bytes, packet-&gt;size is no</span>
  81 <a name="l00059"></a>00059         <span class="comment">// longer reliable, so we go with the Data class size</span>
  82 <a name="l00060"></a>00060         <span class="keywordflow">if</span>( packet.GetSize() &gt; 0xFFFF ) {
  83 <a name="l00061"></a>00061                 <span class="keywordflow">return</span> packet.GetSize();
  84 <a name="l00062"></a>00062         }
  85 <a name="l00063"></a>00063         <span class="keywordflow">else</span> {
  86 <a name="l00064"></a>00064                 <span class="keyword">const</span> Packet *p = (<span class="keyword">const</span> Packet *) packet.GetData();
  87 <a name="l00065"></a>00065                 <span class="keywordflow">return</span> btohs(p-&gt;size);
  88 <a name="l00066"></a>00066         }
  89 <a name="l00067"></a>00067 }
  90 <a name="l00068"></a>00068
  91 <a name="l00069"></a>00069 }} <span class="comment">// namespace Barry::Protocol</span>
  92 <a name="l00070"></a>00070
  93 </pre></div></div>
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