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<hr><h1>tcp_sock.cpp</h1><a href="tcp__sock_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 
00007 <font class="comment">/* Copyright, 2000 Nevrax Ltd.</font>
00008 <font class="comment"> *</font>
00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
00013 <font class="comment"> * any later version.</font>
00014 <font class="comment"></font>
00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00018 <font class="comment"> * General Public License for more details.</font>
00019 <font class="comment"></font>
00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
00023 <font class="comment"> * MA 02111-1307, USA.</font>
00024 <font class="comment"> */</font>
00025 
00026 <font class="preprocessor">#include "<a class="code" href="stdnet_8h.html">stdnet.h</a>"</font>
00027 
00028 <font class="preprocessor">#include "<a class="code" href="tcp__sock_8h.html">nel/net/tcp_sock.h</a>"</font>
00029 
00030 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00031 <font class="preprocessor"></font><font class="preprocessor">#include &lt;winsock2.h&gt;</font>
00032 <font class="preprocessor">#define socklen_t int</font>
00033 <font class="preprocessor"></font><font class="preprocessor">#define ERROR_NUM WSAGetLastError()</font>
00034 <font class="preprocessor"></font>
00035 <font class="preprocessor">#elif defined NL_OS_UNIX</font>
00036 <font class="preprocessor"></font><font class="preprocessor">#include &lt;<a class="code" href="unistd_8h.html">unistd.h</a>&gt;</font>
00037 <font class="preprocessor">#include &lt;sys/types.h&gt;</font>
00038 <font class="preprocessor">#include &lt;sys/time.h&gt;</font>
00039 <font class="preprocessor">#include &lt;sys/socket.h&gt;</font>
00040 <font class="preprocessor">#include &lt;netinet/in.h&gt;</font>
00041 <font class="preprocessor">#include &lt;netinet/tcp.h&gt;</font>
00042 <font class="preprocessor">#include &lt;arpa/inet.h&gt;</font>
00043 <font class="preprocessor">#include &lt;netdb.h&gt;</font>
00044 <font class="preprocessor">#include &lt;errno.h&gt;</font>
00045 <font class="preprocessor">#define SOCKET_ERROR -1</font>
00046 <font class="preprocessor"></font><font class="preprocessor">#define INVALID_SOCKET -1</font>
00047 <font class="preprocessor"></font><font class="preprocessor">#define ERROR_NUM errno</font>
00048 <font class="preprocessor"></font><font class="preprocessor">#define ERROR_MSG strerror(errno)</font>
00049 <font class="preprocessor"></font><font class="keyword">typedef</font> <font class="keywordtype">int</font> SOCKET;
00050 
00051 <font class="preprocessor">#endif</font>
00052 <font class="preprocessor"></font>
00053 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00054 
00055 <font class="keyword">namespace </font>NLNET {
00056 
00057 
00058 <font class="comment">/*</font>
00059 <font class="comment"> * Constructor</font>
00060 <font class="comment"> */</font>
<a name="l00061"></a><a class="code" href="classNLNET_1_1CTcpSock.html#z347_0">00061</a> CTcpSock::CTcpSock( <font class="keywordtype">bool</font> logging ) :
00062         CSock( logging )
00063 {}
00064 
00065 
00066 <font class="comment">/*</font>
00067 <font class="comment"> * Construct a CTcpSocket object using an already connected socket </font>
00068 <font class="comment"> */</font>
<a name="l00069"></a><a class="code" href="classNLNET_1_1CTcpSock.html#z347_1">00069</a> CTcpSock::CTcpSock( SOCKET sock, <font class="keyword">const</font> CInetAddress&amp; remoteaddr ) :
00070         CSock( sock, remoteaddr )
00071 {}
00072 
00073 
00074 <font class="comment">/* Connection. You can reconnect a socket after being disconnected.</font>
00075 <font class="comment"> * This method does not return a boolean, otherwise a programmer could ignore the result and no</font>
00076 <font class="comment"> * exception would be thrown if connection fails :</font>
00077 <font class="comment"> * - If addr is not valid, an exception ESocket is thrown</font>
00078 <font class="comment"> * - If connect() fails for another reason, an exception ESocketConnectionFailed is thrown</font>
00079 <font class="comment"> */</font>
<a name="l00080"></a><a class="code" href="classNLNET_1_1CTcpSock.html#z347_2">00080</a> <font class="keywordtype">void</font> CTcpSock::connect( <font class="keyword">const</font> CInetAddress&amp; addr )
00081 {
00082         <font class="comment">// Create a new socket</font>
00083         <font class="keywordflow">if</font> ( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a> != INVALID_SOCKET )
00084         {
00085           <font class="keywordflow">if</font> ( _Logging )
00086             {
00087 <font class="comment">//              nldebug( "LNETL0: Closing socket %d before reconnecting", _Sock );</font>
00088             }
00089           <a class="code" href="classNLNET_1_1CSock.html#z343_3">close</a>();
00090         }       
00091         <a class="code" href="classNLNET_1_1CSock.html#b2">createSocket</a>( SOCK_STREAM, IPPROTO_TCP );
00092 
00093         <font class="comment">// Connection</font>
00094         CSock::connect( addr );
00095 }
00096 
00097 
00098 <font class="comment">/*</font>
00099 <font class="comment"> * Active disconnection. After disconnecting, you can't connect back with the same socket.</font>
00100 <font class="comment"> */</font>
<a name="l00101"></a><a class="code" href="classNLNET_1_1CTcpSock.html#z347_8">00101</a> <font class="keywordtype">void</font> CTcpSock::disconnect()
00102 {
00103         <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"LNETL0: Socket %d disconnecting from %s..."</font>, <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, <a class="code" href="classNLNET_1_1CSock.html#n2">_RemoteAddr</a>.asString().c_str() );
00104 
00105         <font class="comment">// This shutdown resets the connection immediatly (not a graceful closure)</font>
00106 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00107 <font class="preprocessor"></font>        ::shutdown( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, SD_BOTH );
00108 <font class="preprocessor">#elif defined NL_OS_UNIX</font>
00109 <font class="preprocessor"></font>        ::shutdown( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, SHUT_RDWR );
00110 <font class="preprocessor">#endif</font>
00111 <font class="preprocessor"></font>        <font class="comment">/*CSynchronized&lt;bool&gt;::CAccessor sync( &amp;_SyncConnected );</font>
00112 <font class="comment">        sync.value() = false;*/</font>
00113         <a class="code" href="classNLNET_1_1CSock.html#n5">_Connected</a> = <font class="keyword">false</font>;
00114 }
00115 
00116 
00117 <font class="comment">/*</font>
00118 <font class="comment"> * Active disconnection for download way only</font>
00119 <font class="comment"> */</font>
<a name="l00120"></a><a class="code" href="classNLNET_1_1CTcpSock.html#z347_6">00120</a> <font class="keywordtype">void</font> CTcpSock::shutdownReceiving()
00121 {
00122 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00123 <font class="preprocessor"></font>        ::shutdown( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, SD_RECEIVE );
00124 <font class="preprocessor">#elif defined NL_OS_UNIX</font>
00125 <font class="preprocessor"></font>        ::shutdown( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, SHUT_RD );
00126 <font class="preprocessor">#endif</font>
00127 <font class="preprocessor"></font>}
00128 
00129 
00130 <font class="comment">/*</font>
00131 <font class="comment"> * Active disconnection for upload way only</font>
00132 <font class="comment"> */</font>
<a name="l00133"></a><a class="code" href="classNLNET_1_1CTcpSock.html#z347_7">00133</a> <font class="keywordtype">void</font> CTcpSock::shutdownSending()
00134 {
00135 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00136 <font class="preprocessor"></font>        ::shutdown( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, SD_SEND );
00137 <font class="preprocessor">#elif defined NL_OS_UNIX</font>
00138 <font class="preprocessor"></font>        ::shutdown( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, SHUT_WR );
00139 <font class="preprocessor">#endif</font>
00140 <font class="preprocessor"></font>}
00141 
00142 
00143 <font class="comment">/*</font>
00144 <font class="comment"> * Sets/unsets TCP_NODELAY</font>
00145 <font class="comment"> */</font>
<a name="l00146"></a><a class="code" href="classNLNET_1_1CTcpSock.html#z347_5">00146</a> <font class="keywordtype">void</font> CTcpSock::setNoDelay( <font class="keywordtype">bool</font> value )
00147 {
00148         <font class="keywordtype">int</font> b = value?1:0;
00149         <font class="keywordflow">if</font> ( setsockopt( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, IPPROTO_TCP, TCP_NODELAY, (<font class="keywordtype">char</font>*)&amp;b, <font class="keyword">sizeof</font>(b) ) != 0 )
00150         {
00151                 <font class="keywordflow">throw</font> ESocket( <font class="stringliteral">"setNoDelay failed"</font> );
00152         }
00153 }
00154 
00155 
00156 <font class="comment">/* Sets a custom TCP Window size (SO_RCVBUF and SO_SNDBUF).</font>
00157 <font class="comment"> * You must close the socket is necessary, before calling this method.</font>
00158 <font class="comment"> *</font>
00159 <font class="comment"> * See http://www.ncsa.uiuc.edu/People/vwelch/net_perf/tcp_windows.html</font>
00160 <font class="comment"> */</font>
<a name="l00161"></a><a class="code" href="classNLNET_1_1CTcpSock.html#z347_3">00161</a> <font class="keywordtype">void</font> CTcpSock::connectWithCustomWindowSize( <font class="keyword">const</font> CInetAddress&amp; addr, <font class="keywordtype">int</font> windowsize )
00162 {
00163         <font class="comment">// Create socket</font>
00164         <font class="keywordflow">if</font> ( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a> != INVALID_SOCKET )
00165         {
00166                 <a class="code" href="debug_8h.html#a3">nlerror</a>( <font class="stringliteral">"Cannot connect with custom window size when already connected"</font> );
00167         }
00168         <a class="code" href="classNLNET_1_1CSock.html#b2">createSocket</a>( SOCK_STREAM, IPPROTO_TCP );
00169 
00170         <font class="comment">// Change window size</font>
00171         <font class="keywordflow">if</font> ( setsockopt( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, SOL_SOCKET, SO_SNDBUF, (<font class="keywordtype">char</font>*)&amp;windowsize, <font class="keyword">sizeof</font>(windowsize) ) != 0
00172           || setsockopt( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, SOL_SOCKET, SO_RCVBUF, (<font class="keywordtype">char</font>*)&amp;windowsize, <font class="keyword">sizeof</font>(windowsize) ) != 0 )
00173         {
00174                 <font class="keywordflow">throw</font> ESocket( <font class="stringliteral">"setWindowSize failed"</font> );
00175         }
00176         
00177         <font class="comment">// Connection</font>
00178         CSock::connect( addr );
00179 }
00180 
00181 
00182 <font class="comment">/*</font>
00183 <font class="comment"> * Returns the TCP Window Size for the current socket</font>
00184 <font class="comment"> */</font>
<a name="l00185"></a><a class="code" href="classNLNET_1_1CTcpSock.html#z347_4">00185</a> <a class="code" href="types__nl_8h.html#a9">uint32</a> CTcpSock::getWindowSize()
00186 {
00187         <font class="keywordtype">int</font> windowsize = 0;
00188         socklen_t <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a> = <font class="keyword">sizeof</font>( windowsize );
00189 
00190         <font class="comment">/* send buffer -- query for buffer size */</font>
00191         <font class="keywordflow">if</font> ( getsockopt( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, SOL_SOCKET, SO_SNDBUF, (<font class="keywordtype">char</font>*) &amp;windowsize, &amp;<a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a> ) == 0 )
00192         {
00193                 <font class="keywordflow">return</font> windowsize;
00194         }
00195         <font class="keywordflow">else</font>
00196         {
00197                 <font class="keywordflow">return</font> 0;
00198         }
00199 }
00200 
00201 
00202 } <font class="comment">// NLNET</font>
</pre></div>

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