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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 <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="comment">//#include <fcntl.h></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& 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, &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& 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> *)&SB, &<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> *)&MMS, &<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>& <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> && (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>& <a class="code" href="driver__opengl__extension__def_8h.html#a230">len</a>, CInetAddress& 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*)&saddr, &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( &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>
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