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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 <winsock2.h></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 <<a class="code" href="unistd_8h.html">unistd.h</a>></font>
00037 <font class="preprocessor">#include <sys/types.h></font>
00038 <font class="preprocessor">#include <sys/time.h></font>
00039 <font class="preprocessor">#include <sys/socket.h></font>
00040 <font class="preprocessor">#include <netinet/in.h></font>
00041 <font class="preprocessor">#include <netinet/tcp.h></font>
00042 <font class="preprocessor">#include <arpa/inet.h></font>
00043 <font class="preprocessor">#include <netdb.h></font>
00044 <font class="preprocessor">#include <errno.h></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& 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& 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<bool>::CAccessor sync( &_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>*)&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& 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>*)&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>*)&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>*) &windowsize, &<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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