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<hr><h1>udp_sock.cpp</h1><a href="udp__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="udp__sock_8h.html">nel/net/udp_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="comment">//#include &lt;fcntl.h&gt;</font>
00046 <font class="preprocessor">#define SOCKET_ERROR -1</font>
00047 <font class="preprocessor"></font><font class="preprocessor">#define INVALID_SOCKET -1</font>
00048 <font class="preprocessor"></font><font class="preprocessor">#define ERROR_NUM errno</font>
00049 <font class="preprocessor"></font><font class="preprocessor">#define ERROR_MSG strerror(errno)</font>
00050 <font class="preprocessor"></font><font class="keyword">typedef</font> <font class="keywordtype">int</font> SOCKET;
00051 
00052 <font class="preprocessor">#endif</font>
00053 <font class="preprocessor"></font>
00054 <font class="keyword">using</font> <font class="keyword">namespace </font>NLMISC;
00055 
00056 <font class="keyword">namespace </font>NLNET {
00057 
00058 
00059 <font class="comment">/*</font>
00060 <font class="comment"> * Constructor</font>
00061 <font class="comment"> */</font>
<a name="l00062"></a><a class="code" href="classNLNET_1_1CUdpSock.html#z349_0">00062</a> CUdpSock::CUdpSock( <font class="keywordtype">bool</font> logging ) :
00063         CSock( logging ),
00064         _Bound( false )
00065 {
00066         <font class="comment">// Socket creation</font>
00067         <a class="code" href="classNLNET_1_1CSock.html#b2">createSocket</a>( SOCK_DGRAM, IPPROTO_UDP );
00068 }
00069 
00070 
<a name="l00074"></a><a class="code" href="classNLNET_1_1CUdpSock.html#z349_1">00074</a> <font class="keywordtype">void</font> CUdpSock::bind( <a class="code" href="types__nl_8h.html#a7">uint16</a> port )
00075 {
00076         CInetAddress addr; <font class="comment">// any IP address</font>
00077         addr.setPort( port );
00078         <a class="code" href="classNLNET_1_1CUdpSock.html#z349_1">bind</a>( addr );
00079         <a class="code" href="classNLNET_1_1CSock.html#b3">setLocalAddress</a>(); <font class="comment">// will not set the address if the host is multihomed, use bind(CInetAddress) instead</font>
00080 }
00081 
00082 
00083 <font class="comment">/*</font>
00084 <font class="comment"> * Same as bind(uint16) but binds on a specified address/port (useful when the host has several addresses)</font>
00085 <font class="comment"> */</font>
<a name="l00086"></a><a class="code" href="classNLNET_1_1CUdpSock.html#z349_2">00086</a> <font class="keywordtype">void</font> CUdpSock::bind( <font class="keyword">const</font> CInetAddress&amp; addr )
00087 {
00088 <font class="preprocessor">#ifndef NL_OS_WINDOWS</font>
00089 <font class="preprocessor"></font>        <font class="comment">// Set Reuse Address On (does not work on Win98 and is useless on Win2000)</font>
00090         <font class="keywordtype">int</font> value = <font class="keyword">true</font>;
00091         <font class="keywordflow">if</font> ( setsockopt( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, SOL_SOCKET, SO_REUSEADDR, &amp;value, <font class="keyword">sizeof</font>(value) ) == SOCKET_ERROR )
00092         {
00093                 <font class="keywordflow">throw</font> ESocket( <font class="stringliteral">"ReuseAddr failed"</font> );
00094         }
00095 <font class="preprocessor">#endif</font>
00096 <font class="preprocessor"></font>
00097         <a class="code" href="classNLNET_1_1CSock.html#n1">_LocalAddr</a> = addr;
00098 
00099         <font class="comment">// Bind the socket</font>
00100         <font class="keywordflow">if</font> ( ::bind( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, (sockaddr*)(<a class="code" href="classNLNET_1_1CSock.html#n1">_LocalAddr</a>.sockAddr()), <font class="keyword">sizeof</font>(sockaddr) ) == SOCKET_ERROR )
00101         {
00102                 <font class="keywordflow">throw</font> ESocket( <font class="stringliteral">"Bind failed"</font> );
00103         }
00104         <a class="code" href="classNLNET_1_1CUdpSock.html#o0">_Bound</a> = <font class="keyword">true</font>;
00105         <font class="keywordflow">if</font> ( _Logging )
00106         {
00107                 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"LNETL0: Socket %d bound at %s"</font>, <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, <a class="code" href="classNLNET_1_1CSock.html#n1">_LocalAddr</a>.asString().c_str() );
00108         }
00109 }
00110 
00111 
00112 <font class="comment">/*</font>
00113 <font class="comment"> * Sends a message</font>
00114 <font class="comment"> */</font>
<a name="l00115"></a><a class="code" href="classNLNET_1_1CUdpSock.html#z351_0">00115</a> <font class="keywordtype">void</font> CUdpSock::sendTo( <font class="keyword">const</font> <a class="code" href="types__nl_8h.html#a5">uint8</a> *buffer, <a class="code" href="types__nl_8h.html#a13">uint</a> <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a>, <font class="keyword">const</font> CInetAddress&amp; addr )
00116 {
00117         
00118         <font class="comment">//  Send</font>
00119         <font class="keywordflow">if</font> ( ::sendto( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, (<font class="keyword">const</font> <font class="keywordtype">char</font>*)buffer, <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a>, 0, (sockaddr*)(addr.sockAddr()), <font class="keyword">sizeof</font>(sockaddr) ) != (sint32)<a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a> )
00120         {
00121                 <font class="keywordflow">throw</font> ESocket( <font class="stringliteral">"Unable to send datagram"</font> );
00122         }
00123         <a class="code" href="classNLNET_1_1CSock.html#n7">_BytesSent</a> += <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a>;
00124 
00125         <font class="keywordflow">if</font> ( _Logging )
00126         {
00127                 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"LNETL0: Socket %d sent %d bytes to %s"</font>, <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a>, addr.asString().c_str() );
00128         }
00129 
00130         <font class="comment">// If socket is unbound, retrieve local address</font>
00131         <font class="keywordflow">if</font> ( ! <a class="code" href="classNLNET_1_1CUdpSock.html#o0">_Bound</a> )
00132         {
00133                 <a class="code" href="classNLNET_1_1CSock.html#b3">setLocalAddress</a>();
00134                 <a class="code" href="classNLNET_1_1CUdpSock.html#o0">_Bound</a> = <font class="keyword">true</font>;
00135         }
00136 
00137 <font class="preprocessor">#ifdef NL_OS_WINDOWS</font>
00138 <font class="preprocessor"></font>        <font class="comment">// temporary by ace to know size of SO_MAX_MSG_SIZE</font>
00139         <font class="keyword">static</font> <font class="keywordtype">bool</font> first = <font class="keyword">true</font>;
00140         <font class="keywordflow">if</font> (first)
00141         {
00142                 <a class="code" href="types__nl_8h.html#a13">uint</a> MMS, SB;
00143                 <font class="keywordtype">int</font>  <a class="code" href="lexlang_8cpp.html#a56">size</a> = <font class="keyword">sizeof</font> (MMS);
00144                 getsockopt (<a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, SOL_SOCKET, SO_SNDBUF, (<font class="keywordtype">char</font> *)&amp;SB, &amp;<a class="code" href="lexlang_8cpp.html#a56">size</a>);
00145                 getsockopt (<a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, SOL_SOCKET, SO_MAX_MSG_SIZE, (<font class="keywordtype">char</font> *)&amp;MMS, &amp;<a class="code" href="lexlang_8cpp.html#a56">size</a>);
00146                 <a class="code" href="debug_8h.html#a1">nlinfo</a> (<font class="stringliteral">"the udp SO_MAX_MSG_SIZE=%u, SO_SNDBUF=%u"</font>, MMS, SB);
00147                 first = <font class="keyword">false</font>;
00148         }
00149 <font class="preprocessor">#endif</font>
00150 <font class="preprocessor"></font>}
00151 
00152 
00153 <font class="comment">/*</font>
00154 <font class="comment"> * Receives data from the peer. (blocking function)</font>
00155 <font class="comment"> */</font>
<a name="l00156"></a><a class="code" href="classNLNET_1_1CUdpSock.html#z350_0">00156</a> <font class="keywordtype">void</font> CUdpSock::receive( <a class="code" href="types__nl_8h.html#a5">uint8</a> *buffer, <a class="code" href="types__nl_8h.html#a9">uint32</a>&amp; <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a> )
00157 {
00158         <a class="code" href="debug_8h.html#a6">nlassert</a>( <a class="code" href="classNLNET_1_1CSock.html#n5">_Connected</a> &amp;&amp; (buffer!=NULL) );
00159 
00160         <font class="comment">// Receive incoming message</font>
00161         <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a> = ::recv( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, (<font class="keywordtype">char</font>*)buffer, <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a> , 0 );
00162 
00163         <font class="comment">// Check for errors (after setting the address)</font>
00164         <font class="keywordflow">if</font> ( <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a> == SOCKET_ERROR )
00165         {
00166                 <font class="keywordflow">throw</font> ESocket( <font class="stringliteral">"Cannot receive data"</font> );
00167         }
00168 
00169         <a class="code" href="classNLNET_1_1CSock.html#n6">_BytesReceived</a> += <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a>;
00170         <font class="keywordflow">if</font> ( _Logging )
00171         {
00172                 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"LNETL0: Socket %d received %d bytes from peer %s"</font>, <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a>, <a class="code" href="classNLNET_1_1CSock.html#n2">_RemoteAddr</a>.asString().c_str() );
00173         }
00174 }
00175 
00176 
00177 <font class="comment">/*</font>
00178 <font class="comment"> * Receives data and say who the sender is. (blocking function)</font>
00179 <font class="comment"> */</font>
<a name="l00180"></a><a class="code" href="classNLNET_1_1CUdpSock.html#z350_1">00180</a> <font class="keywordtype">void</font> CUdpSock::receivedFrom( <a class="code" href="types__nl_8h.html#a5">uint8</a> *buffer, <a class="code" href="types__nl_8h.html#a13">uint</a>&amp; <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a>, CInetAddress&amp; addr )
00181 {
00182         <font class="comment">// Receive incoming message</font>
00183         sockaddr_in saddr;
00184         socklen_t saddrlen = <font class="keyword">sizeof</font>(saddr);
00185 
00186         <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a> = ::recvfrom( <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, (<font class="keywordtype">char</font>*)buffer, <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a> , 0, (sockaddr*)&amp;saddr, &amp;saddrlen );
00187 
00188         <font class="comment">// If an error occurs, the saddr is not valid</font>
00189         <font class="comment">// When the remote socket is closed, get sender's address to know who is quitting</font>
00190         addr.setSockAddr( &amp;saddr );
00191 
00192         <font class="comment">// Check for errors (after setting the address)</font>
00193         <font class="keywordflow">if</font> ( <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a> == SOCKET_ERROR )
00194         {
00195                 <font class="keywordflow">throw</font> ESocket( <font class="stringliteral">"Cannot receive data"</font> );
00196         }
00197 
00198         <a class="code" href="classNLNET_1_1CSock.html#n6">_BytesReceived</a> += <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a>;
00199         <font class="keywordflow">if</font> ( _Logging )
00200         {
00201                 <a class="code" href="debug_8h.html#a0">nldebug</a>( <font class="stringliteral">"LNETL0: Socket %d received %d bytes from %s"</font>, <a class="code" href="classNLNET_1_1CSock.html#n0">_Sock</a>, <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a>, addr.asString().c_str() );
00202         }
00203 }
00204 
00205 
00206 } <font class="comment">// NLNET</font>
</pre></div>

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