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<div class="header">
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<div class="title">NetGram.h</div>  </div>
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<div class="contents">
<a href="_net_gram_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*  Project nGenEx</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">    Destroyer Studios LLC</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">    Copyright © 1997-2004. All Rights Reserved.</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">    SUBSYSTEM:    NetEx.lib</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">    FILE:         NetGram.h</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">    AUTHOR:       John DiCamillo</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">    OVERVIEW</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">    ========</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">    Datagram (UDP) packet that implements the basic</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">    packet-oriented network protocol.</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment">*/</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;</div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#ifndef NetGram_h</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define NetGram_h</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor">#include &lt;windows.h&gt;</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_net_addr_8h.html">NetAddr.h</a>&quot;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="_text_8h.html">Text.h</a>&quot;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment">// +-------------------------------------------------------------------+</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;</div>
<div class="line"><a name="l00026"></a><span class="lineno"><a class="code" href="_net_gram_8h.html#acdf4b25f87263e48f4f67b59750dcfb2">   26</a></span>&#160;<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="_net_gram_8h.html#acdf4b25f87263e48f4f67b59750dcfb2">NET_GRAM_ACK</a>           = 0x80000000;</div>
<div class="line"><a name="l00027"></a><span class="lineno"><a class="code" href="_net_gram_8h.html#a0af0ddf8a35880f69507c24941fa7db8">   27</a></span>&#160;<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="_net_gram_8h.html#a0af0ddf8a35880f69507c24941fa7db8">NET_GRAM_RELIABLE</a>      = 0x40000000;</div>
<div class="line"><a name="l00028"></a><span class="lineno"><a class="code" href="_net_gram_8h.html#a1918af375bcb95e0d959b1f7e54b1e7f">   28</a></span>&#160;<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="_net_gram_8h.html#a1918af375bcb95e0d959b1f7e54b1e7f">NET_GRAM_SEQ_MASK</a>      = 0x3fffffff;</div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;</div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="code" href="_net_gram_8h.html#a307875251c35a462d1b7b8ccca2a0b42">   30</a></span>&#160;<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="_net_gram_8h.html#a307875251c35a462d1b7b8ccca2a0b42">NET_GRAM_HEADER_SIZE</a>   = 4;</div>
<div class="line"><a name="l00031"></a><span class="lineno"><a class="code" href="_net_gram_8h.html#a0e95ce2ed397ce187a8b53301cbdcd27">   31</a></span>&#160;<span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="_net_gram_8h.html#a0e95ce2ed397ce187a8b53301cbdcd27">NET_GRAM_MAX_SIZE</a>      = 1024;</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="comment">// +-------------------------------------------------------------------+</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;</div>
<div class="line"><a name="l00035"></a><span class="lineno"><a class="code" href="class_net_gram.html">   35</a></span>&#160;<span class="keyword">class </span><a class="code" href="class_net_gram.html">NetGram</a></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;{</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00038"></a><span class="lineno"><a class="code" href="class_net_gram.html#a41ba91ca9660fb128a0d2acb3422e3ed">   38</a></span>&#160;   <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="class_net_gram.html#a41ba91ca9660fb128a0d2acb3422e3ed">TYPENAME</a>() { <span class="keywordflow">return</span> <span class="stringliteral">&quot;NetGram&quot;</span>; }</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;   <span class="comment">// for receiving packets from remote hosts:</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;   <a class="code" href="class_net_gram.html#a477c911600d157067d1c15ae603f0232">NetGram</a>(<span class="keyword">const</span> <a class="code" href="class_net_addr.html">NetAddr</a>&amp; src, <a class="code" href="class_text.html">Text</a> msg);</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;</div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;   <span class="comment">// for composing packets to send to remote hosts:</span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;   <a class="code" href="class_net_gram.html#a477c911600d157067d1c15ae603f0232">NetGram</a>(<span class="keyword">const</span> <a class="code" href="class_net_addr.html">NetAddr</a>&amp; dst, <a class="code" href="class_text.html">Text</a> user_data, <span class="keywordtype">int</span> <a class="code" href="class_net_gram.html#a86c48373a379b80a880e0f429d11a2a7">retries</a>);</div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;</div>
<div class="line"><a name="l00046"></a><span class="lineno"><a class="code" href="class_net_gram.html#ad18b2e1237f2c37842850d6537cfae30">   46</a></span>&#160;   <span class="keywordtype">int</span> <a class="code" href="class_net_gram.html#ad18b2e1237f2c37842850d6537cfae30">operator == </a>(<span class="keyword">const</span> <a class="code" href="class_net_gram.html">NetGram</a>&amp; g)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="class_net_gram.html#a7bf70a1af3c8725488d4b6f4227b7d5b">packet_id</a> == g.<a class="code" href="class_net_gram.html#a7bf70a1af3c8725488d4b6f4227b7d5b">packet_id</a> &amp;&amp;</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;                                                     <a class="code" href="class_net_gram.html#a943563e68681468c424b113c749e408c">addr</a>      == g.<a class="code" href="class_net_gram.html#a943563e68681468c424b113c749e408c">addr</a>;        }</div>
<div class="line"><a name="l00048"></a><span class="lineno"><a class="code" href="class_net_gram.html#ae605c19e52f1dcdbe3b6bdfd9bbb2290">   48</a></span>&#160;   <span class="keywordtype">int</span> <a class="code" href="class_net_gram.html#ae605c19e52f1dcdbe3b6bdfd9bbb2290">operator &lt;  </a>(<span class="keyword">const</span> <a class="code" href="class_net_gram.html">NetGram</a>&amp; g)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> <a class="code" href="class_net_gram.html#a573f674de07b8b6ff281ccef8828f96b">Sequence</a>() &lt; g.<a class="code" href="class_net_gram.html#a573f674de07b8b6ff281ccef8828f96b">Sequence</a>();  }</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;</div>
<div class="line"><a name="l00050"></a><span class="lineno"><a class="code" href="class_net_gram.html#a16b28156657f933c1538b57697a62a01">   50</a></span>&#160;   DWORD          <a class="code" href="class_net_gram.html#a16b28156657f933c1538b57697a62a01">PacketID</a>()<span class="keyword">  const </span>{ <span class="keywordflow">return</span> <a class="code" href="class_net_gram.html#a7bf70a1af3c8725488d4b6f4227b7d5b">packet_id</a>;                                   }</div>
<div class="line"><a name="l00051"></a><span class="lineno"><a class="code" href="class_net_gram.html#a573f674de07b8b6ff281ccef8828f96b">   51</a></span>&#160;   DWORD          <a class="code" href="class_net_gram.html#a573f674de07b8b6ff281ccef8828f96b">Sequence</a>()<span class="keyword">  const </span>{ <span class="keywordflow">return</span> <a class="code" href="class_net_gram.html#a7bf70a1af3c8725488d4b6f4227b7d5b">packet_id</a> &amp; <a class="code" href="_net_gram_8h.html#a1918af375bcb95e0d959b1f7e54b1e7f">NET_GRAM_SEQ_MASK</a>;               }</div>
<div class="line"><a name="l00052"></a><span class="lineno"><a class="code" href="class_net_gram.html#ae2e03b6fbd25c87d99b26dd6a8a94c35">   52</a></span>&#160;   DWORD          <a class="code" href="class_net_gram.html#ae2e03b6fbd25c87d99b26dd6a8a94c35">SendTime</a>()<span class="keyword">  const </span>{ <span class="keywordflow">return</span> <a class="code" href="class_net_gram.html#a47a4a4786428a8cdbfe666039dfe43a7">send_time</a>;                                   }</div>
<div class="line"><a name="l00053"></a><span class="lineno"><a class="code" href="class_net_gram.html#a9fd606ef8c27740dd20ea86b59ff57ba">   53</a></span>&#160;   BYTE*          <a class="code" href="class_net_gram.html#a9fd606ef8c27740dd20ea86b59ff57ba">Data</a>()<span class="keyword">      const </span>{ <span class="keywordflow">return</span> (BYTE*) <a class="code" href="class_net_gram.html#a7448cb37aba55bd26c478f74c56c0b8f">body</a>.<a class="code" href="class_text.html#aae848844d712fd439b42fe6fb8d89bd6">data</a>();                         }</div>
<div class="line"><a name="l00054"></a><span class="lineno"><a class="code" href="class_net_gram.html#a0227c1eb96d06565640a419b93e23988">   54</a></span>&#160;   BYTE*          <a class="code" href="class_net_gram.html#a0227c1eb96d06565640a419b93e23988">UserData</a>()<span class="keyword">  const </span>{ <span class="keywordflow">return</span> (BYTE*) <a class="code" href="class_net_gram.html#a7448cb37aba55bd26c478f74c56c0b8f">body</a>.<a class="code" href="class_text.html#aae848844d712fd439b42fe6fb8d89bd6">data</a>() + <a class="code" href="_net_gram_8h.html#a307875251c35a462d1b7b8ccca2a0b42">NET_GRAM_HEADER_SIZE</a>;  }</div>
<div class="line"><a name="l00055"></a><span class="lineno"><a class="code" href="class_net_gram.html#a5a0c931331cc684c36f5141f24443982">   55</a></span>&#160;   <span class="keywordtype">int</span>            <a class="code" href="class_net_gram.html#a5a0c931331cc684c36f5141f24443982">Size</a>()<span class="keyword">      const </span>{ <span class="keywordflow">return</span> <a class="code" href="class_net_gram.html#a7448cb37aba55bd26c478f74c56c0b8f">body</a>.<a class="code" href="class_text.html#a3dfa250f46fd909c4fe95fc59372838c">length</a>();                               }</div>
<div class="line"><a name="l00056"></a><span class="lineno"><a class="code" href="class_net_gram.html#abc5c545f032122dd53c500d70aa55460">   56</a></span>&#160;   <span class="keyword">const</span> <a class="code" href="class_text.html">Text</a>&amp;    <a class="code" href="class_net_gram.html#abc5c545f032122dd53c500d70aa55460">Body</a>()<span class="keyword">      const </span>{ <span class="keywordflow">return</span> <a class="code" href="class_net_gram.html#a7448cb37aba55bd26c478f74c56c0b8f">body</a>;                                        }</div>
<div class="line"><a name="l00057"></a><span class="lineno"><a class="code" href="class_net_gram.html#ad633ec72290f4b29f9f243e6efba4395">   57</a></span>&#160;   <span class="keyword">const</span> <a class="code" href="class_net_addr.html">NetAddr</a>&amp; <a class="code" href="class_net_gram.html#ad633ec72290f4b29f9f243e6efba4395">Address</a>()<span class="keyword">   const </span>{ <span class="keywordflow">return</span> <a class="code" href="class_net_gram.html#a943563e68681468c424b113c749e408c">addr</a>;                                        }</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;</div>
<div class="line"><a name="l00059"></a><span class="lineno"><a class="code" href="class_net_gram.html#a4a3d08ac831481d08098ba5c4d31c699">   59</a></span>&#160;   <span class="keywordtype">bool</span>        <a class="code" href="class_net_gram.html#a4a3d08ac831481d08098ba5c4d31c699">IsAck</a>()<span class="keyword">        const </span>{ <span class="keywordflow">return</span> <a class="code" href="class_net_gram.html#a7bf70a1af3c8725488d4b6f4227b7d5b">packet_id</a> &amp; <a class="code" href="_net_gram_8h.html#acdf4b25f87263e48f4f67b59750dcfb2">NET_GRAM_ACK</a>      ? <span class="keyword">true</span> : <span class="keyword">false</span>; }</div>
<div class="line"><a name="l00060"></a><span class="lineno"><a class="code" href="class_net_gram.html#afcd207aa96c7ddbed1f971e0c210a0b0">   60</a></span>&#160;   <span class="keywordtype">bool</span>        <a class="code" href="class_net_gram.html#afcd207aa96c7ddbed1f971e0c210a0b0">IsReliable</a>()<span class="keyword">   const </span>{ <span class="keywordflow">return</span> <a class="code" href="class_net_gram.html#a7bf70a1af3c8725488d4b6f4227b7d5b">packet_id</a> &amp; <a class="code" href="_net_gram_8h.html#a0af0ddf8a35880f69507c24941fa7db8">NET_GRAM_RELIABLE</a> ? <span class="keyword">true</span> : <span class="keyword">false</span>; }</div>
<div class="line"><a name="l00061"></a><span class="lineno"><a class="code" href="class_net_gram.html#adab9fbb49d5798da238b5e006ac7c10f">   61</a></span>&#160;   <span class="keywordtype">int</span>         <a class="code" href="class_net_gram.html#adab9fbb49d5798da238b5e006ac7c10f">Retries</a>()<span class="keyword">      const </span>{ <span class="keywordflow">return</span> <a class="code" href="class_net_gram.html#a86c48373a379b80a880e0f429d11a2a7">retries</a>; }</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;   <span class="keywordtype">void</span>        <a class="code" href="class_net_gram.html#ad08b0f39d585ccffbd7168fc18c62fd3">Retry</a>();</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;   <a class="code" href="class_net_gram.html">NetGram</a>     <a class="code" href="class_net_gram.html#accf86076432f5949775f607dab7afc65">Ack</a>();</div>
<div class="line"><a name="l00065"></a><span class="lineno"><a class="code" href="class_net_gram.html#ae8ca971d52f4f3b7ae30e7346c3f8b05">   65</a></span>&#160;   <span class="keywordtype">void</span>        <a class="code" href="class_net_gram.html#ae8ca971d52f4f3b7ae30e7346c3f8b05">ClearAck</a>()           { <a class="code" href="class_net_gram.html#a7bf70a1af3c8725488d4b6f4227b7d5b">packet_id</a> &amp;= ~<a class="code" href="_net_gram_8h.html#acdf4b25f87263e48f4f67b59750dcfb2">NET_GRAM_ACK</a>;                         }</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;<span class="keyword">protected</span>:</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;   <a class="code" href="class_net_gram.html#a477c911600d157067d1c15ae603f0232">NetGram</a>();</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;</div>
<div class="line"><a name="l00070"></a><span class="lineno"><a class="code" href="class_net_gram.html#a943563e68681468c424b113c749e408c">   70</a></span>&#160;   <a class="code" href="class_net_addr.html">NetAddr</a>  <a class="code" href="class_net_gram.html#a943563e68681468c424b113c749e408c">addr</a>;       <span class="comment">// network address of remote host</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"><a class="code" href="class_net_gram.html#a86c48373a379b80a880e0f429d11a2a7">   71</a></span>&#160;   <span class="keywordtype">int</span>      <a class="code" href="class_net_gram.html#a86c48373a379b80a880e0f429d11a2a7">retries</a>;    <span class="comment">// number of retries remaining (reliable packets only)</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"><a class="code" href="class_net_gram.html#a47a4a4786428a8cdbfe666039dfe43a7">   72</a></span>&#160;   DWORD    <a class="code" href="class_net_gram.html#a47a4a4786428a8cdbfe666039dfe43a7">send_time</a>;  <span class="comment">// time in msec of most recent send attempt</span></div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;</div>
<div class="line"><a name="l00074"></a><span class="lineno"><a class="code" href="class_net_gram.html#a7bf70a1af3c8725488d4b6f4227b7d5b">   74</a></span>&#160;   DWORD    <a class="code" href="class_net_gram.html#a7bf70a1af3c8725488d4b6f4227b7d5b">packet_id</a>;  <span class="comment">// copy of packet id from header in body</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"><a class="code" href="class_net_gram.html#a7448cb37aba55bd26c478f74c56c0b8f">   75</a></span>&#160;   <a class="code" href="class_text.html">Text</a>     <a class="code" href="class_net_gram.html#a7448cb37aba55bd26c478f74c56c0b8f">body</a>;       <span class="comment">// header plus user data</span></div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;};</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;<span class="preprocessor">#endif NetGram_h</span></div>
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