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<h1>Socket.c</h1><a href="Socket_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/// @source Socket.c</span>
<a name="l00002"></a>00002 <span class="comment"></span><span class="comment">/// @description Implementation of the Socket facility.</span>
<a name="l00003"></a>00003 <span class="comment"></span><span class="comment">// See licensing information in the file README.TXT.</span>
<a name="l00004"></a>00004
<a name="l00005"></a>00005 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00006"></a>00006
<a name="l00007"></a>00007 <span class="comment">// includes</span>
<a name="l00008"></a>00008
<a name="l00009"></a>00009 <span class="comment">// common configuration options & declarations</span>
<a name="l00010"></a>00010 <span class="preprocessor">#include "<a class="code" href="config_8h.html" title="Common configuration options &amp; declarations.">config.h</a>"</span> <span class="comment">// always include first</span>
<a name="l00011"></a>00011
<a name="l00012"></a>00012 <span class="comment">// C language includes</span>
<a name="l00013"></a>00013 <span class="preprocessor">#include <assert.h></span>
<a name="l00014"></a>00014 <span class="preprocessor">#include <stdio.h></span>
<a name="l00015"></a>00015 <span class="preprocessor">#include <stdlib.h></span> <span class="comment">// abort</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="comment">// Windows-specific includes</span>
<a name="l00018"></a>00018 <span class="preprocessor">#if PLATFORM(Windows)</span>
<a name="l00019"></a>00019 <span class="preprocessor"></span><span class="preprocessor">#pragma warning(disable: 4115)</span>
<a name="l00020"></a>00020 <span class="preprocessor"></span><span class="preprocessor">#include <windows.h></span>
<a name="l00021"></a>00021 <span class="preprocessor">#endif</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span>
<a name="l00023"></a>00023 <span class="comment">// Linux-specific includes</span>
<a name="l00024"></a>00024 <span class="preprocessor">#if PLATFORM(Linux)</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span><span class="preprocessor">#include <fcntl.h></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <arpa/inet.h></span> <span class="comment">// inet_ntoa</span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <netinet/in.h></span> <span class="comment">// sockets</span>
<a name="l00028"></a>00028 <span class="preprocessor">#include <signal.h></span>
<a name="l00029"></a>00029 <span class="preprocessor">#endif</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span>
<a name="l00031"></a>00031 <span class="comment">// framework includes</span>
<a name="l00032"></a>00032 <span class="preprocessor">#include "<a class="code" href="Socket_8h.html" title="Public interface for the Socket facility.">Socket.h</a>"</span> <span class="comment">/* socket_xxx functions */</span>
<a name="l00033"></a>00033 <span class="preprocessor">#include "<a class="code" href="Log_8h.html" title="Public interface for the Log facility.">util/Log.h</a>"</span> <span class="comment">/* log_xxx functions */</span>
<a name="l00034"></a>00034 <span class="preprocessor">#include "<a class="code" href="Thread_8h.html" title="Public interface for class Thread.">util/Thread.h</a>"</span> <span class="comment">/* thread_xxx functions */</span>
<a name="l00035"></a>00035 <span class="preprocessor">#include "<a class="code" href="Timeout_8h.html" title="Public interface for the Timeout facility.">util/Timeout.h</a>"</span> <span class="comment">/* timeout_xxx functions */</span>
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00038"></a>00038
<a name="l00039"></a>00039 <span class="comment">// global declarations</span>
<a name="l00040"></a>00040 <span class="comment"></span>
<a name="l00041"></a>00041 <span class="comment">/// Socket class.</span>
<a name="l00042"></a>00042 <span class="comment">/// A class that provides low level access to the Berkeley sockets used in the</span>
<a name="l00043"></a>00043 <span class="comment">/// framework.</span>
<a name="l00044"></a>00044 <span class="comment">/// @class Socket</span>
<a name="l00045"></a>00045 <span class="comment"></span><span class="comment"></span>
<a name="l00046"></a>00046 <span class="comment">/// Source identification for the Log file</span>
<a name="l00047"></a>00047 <span class="comment">/// @private @memberof Socket</span>
<a name="l00048"></a><a class="code" href="classSocket.html#a7e2c66ccc38864c00befd65cefa28c00">00048</a> <span class="comment"></span><span class="keyword">static</span> <a class="code" href="config_8h.html#a0f128c3e0c83721af0220c00554e9c4e" title="const char abbreviation">cchar</a> <a class="code" href="classClient.html#a7e2c66ccc38864c00befd65cefa28c00" title="Identification for the Log file.">sourceID</a>[] = <span class="stringliteral">"ZSO"</span>;
<a name="l00049"></a>00049 <span class="comment"></span>
<a name="l00050"></a>00050 <span class="comment">/// Convenience macro: length of socket address structure</span>
<a name="l00051"></a>00051 <span class="comment">/// @private @memberof Socket</span>
<a name="l00052"></a><a class="code" href="classSocket.html#a6eb7d5cea9d48177a28dd9ce6c15d763">00052</a> <span class="comment"></span><span class="keyword">enum</span> <a class="code" href="classSocket.html#a6eb7d5cea9d48177a28dd9ce6c15d763" title="Convenience macro: length of socket address structure.">SockAddrLen</a>
<a name="l00053"></a>00053 {
<a name="l00054"></a><a class="code" href="Socket_8c.html#a7c84d37521c551e449eaa3dc6e352dab">00054</a> <a class="code" href="Socket_8c.html#a7c84d37521c551e449eaa3dc6e352dab">SOCKADDR_LEN</a> = <span class="keyword">sizeof</span>(<span class="keyword">struct </span>sockaddr)
<a name="l00055"></a>00055 };
<a name="l00056"></a>00056
<a name="l00057"></a>00057 <span class="comment">// for use by GenericClient</span>
<a name="l00058"></a><a class="code" href="Socket_8c.html#aa693131339ad966166894f25223a6bdb">00058</a> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="Socket_8c.html#aa693131339ad966166894f25223a6bdb">partialLenReceived</a>;
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <span class="comment">// internal helper function prototypes</span><span class="comment"></span>
<a name="l00061"></a>00061 <span class="comment">/// @cond hides_from_doxygen</span>
<a name="l00062"></a>00062 <span class="comment"></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="classSocket.html#aadd3e5b47036ac0ab8efe79b937146ca" title="Creates a TCP socket.">createTCPsocket</a>(<span class="keywordtype">void</span>);
<a name="l00063"></a>00063 <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="classSocket.html#a57c28e0df876528e9511a55e29f3bc00" title="Waits until there&#39;s some bytes available to receive, or timeout occurs.">waitRecvEvent</a>(<span class="keywordtype">int</span>, <a class="code" href="config_8h.html#a91ad9478d81a7aaf2593e8d9c3d06a14" title="unsigned int abbreviation">uint</a>);
<a name="l00064"></a>00064 <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="classSocket.html#afb85aa9647420dc41874760516f16f4d" title="Waits until it&#39;s possible to send some bytes through the socket without blocking...">waitSendEvent</a>(<span class="keywordtype">int</span>, <a class="code" href="config_8h.html#a91ad9478d81a7aaf2593e8d9c3d06a14" title="unsigned int abbreviation">uint</a>);<span class="comment"></span>
<a name="l00065"></a>00065 <span class="comment">/// @endcond</span>
<a name="l00066"></a>00066 <span class="comment"></span>
<a name="l00067"></a>00067 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00068"></a>00068 <span class="comment">// PUBLIC INTERFACE</span>
<a name="l00069"></a>00069 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00070"></a>00070 <span class="comment"></span>
<a name="l00071"></a>00071 <span class="comment">/** Connects a client socket with a server.</span>
<a name="l00072"></a>00072 <span class="comment"></span>
<a name="l00073"></a>00073 <span class="comment"> @param [in]</span>
<a name="l00074"></a>00074 <span class="comment"> clientSocket : the client socket to be connected</span>
<a name="l00075"></a>00075 <span class="comment"></span>
<a name="l00076"></a>00076 <span class="comment"> @param [in]</span>
<a name="l00077"></a>00077 <span class="comment"> serverAddress : IP address of the server</span>
<a name="l00078"></a>00078 <span class="comment"></span>
<a name="l00079"></a>00079 <span class="comment"> @param [in]</span>
<a name="l00080"></a>00080 <span class="comment"> port : the port on which the server waits for connection requests</span>
<a name="l00081"></a>00081 <span class="comment"></span>
<a name="l00082"></a>00082 <span class="comment"> @return</span>
<a name="l00083"></a>00083 <span class="comment"> true if successful, false if not</span>
<a name="l00084"></a>00084 <span class="comment"></span>
<a name="l00085"></a>00085 <span class="comment"> @memberof Socket</span>
<a name="l00086"></a>00086 <span class="comment">*/</span>
<a name="l00087"></a>00087
<a name="l00088"></a><a class="code" href="classSocket.html#a21a9ff688bda980aa3154c16069287f2">00088</a> TC2API <span class="keywordtype">bool</span> <a class="code" href="classSocket.html#a21a9ff688bda980aa3154c16069287f2" title="Connects a client socket with a server.">socket_connect</a>(<span class="keywordtype">int</span> <a class="code" href="classClient.html#adc5475d507e3d713ad405bbeb6eb41e7" title="The client socket.">clientSocket</a>, <a class="code" href="config_8h.html#a91ad9478d81a7aaf2593e8d9c3d06a14" title="unsigned int abbreviation">uint</a> <a class="code" href="classClient.html#a6dee50ddcd3fa9bd16c33ea160d15ae6" title="Default server IP address in binary (127.1).">serverAddress</a>, <a class="code" href="config_8h.html#ab95f123a6c9bcfee6a343170ef8c5f69" title="unsigned short abbreviation">ushort</a> port)
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 <span class="keyword">struct </span>sockaddr_in sin; <span class="comment">// server socket control structure </span>
<a name="l00091"></a>00091
<a name="l00092"></a>00092 sin.sin_family = AF_INET;
<a name="l00093"></a>00093 sin.sin_addr.s_addr = serverAddress;
<a name="l00094"></a>00094 sin.sin_port = htons(port);
<a name="l00095"></a>00095
<a name="l00096"></a>00096 <span class="keywordflow">return</span> (connect(clientSocket, (<span class="keyword">struct</span> sockaddr*)&sin, <span class="keyword">sizeof</span>(sin)) == 0);
<a name="l00097"></a>00097 }
<a name="l00098"></a>00098
<a name="l00099"></a>00099 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00100"></a>00100 <span class="comment">// PUBLIC INTERFACE</span>
<a name="l00101"></a>00101 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00102"></a>00102 <span class="comment"></span>
<a name="l00103"></a>00103 <span class="comment">/** Creates a client TCP socket.</span>
<a name="l00104"></a>00104 <span class="comment"></span>
<a name="l00105"></a>00105 <span class="comment"> @return</span>
<a name="l00106"></a>00106 <span class="comment"> clientSocket : a socket descriptor</span>
<a name="l00107"></a>00107 <span class="comment"></span>
<a name="l00108"></a>00108 <span class="comment"> @memberof Socket</span>
<a name="l00109"></a>00109 <span class="comment">*/</span>
<a name="l00110"></a>00110
<a name="l00111"></a><a class="code" href="classSocket.html#a626d07f2d347c9695c03ee56d5abae57">00111</a> TC2API <span class="keywordtype">int</span> <a class="code" href="classSocket.html#a626d07f2d347c9695c03ee56d5abae57" title="Creates a client TCP socket.">socket_createClientSocket</a>(<span class="keywordtype">void</span>)
<a name="l00112"></a>00112 {
<a name="l00113"></a>00113 <span class="keywordtype">int</span> <a class="code" href="classClient.html#adc5475d507e3d713ad405bbeb6eb41e7" title="The client socket.">clientSocket</a>;
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <a class="code" href="Log_8h.html#aba64819ead3a2defc230ec7ccf655c4e" title="standard source file name for inclusion in log">log_func</a>(<a class="code" href="classSocket.html#a626d07f2d347c9695c03ee56d5abae57" title="Creates a client TCP socket.">socket_createClientSocket</a>);
<a name="l00116"></a>00116 <a class="code" href="Log_8h.html#a619ac1ab71ab5d1c7e94e03ddbf16d3b" title="log informational record with function identification (see Log::log_fheader)">log_finfo</a>(<span class="stringliteral">"creating a client socket"</span>);
<a name="l00117"></a>00117
<a name="l00118"></a>00118 clientSocket = <a class="code" href="classSocket.html#aadd3e5b47036ac0ab8efe79b937146ca" title="Creates a TCP socket.">createTCPsocket</a>();
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="keywordflow">return</span> clientSocket;
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122
<a name="l00123"></a>00123 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00124"></a>00124 <span class="comment">// PUBLIC INTERFACE</span>
<a name="l00125"></a>00125 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00126"></a>00126 <span class="comment"></span>
<a name="l00127"></a>00127 <span class="comment">/** Initializes the Socket class.</span>
<a name="l00128"></a>00128 <span class="comment"> @fn void socket_init(void)</span>
<a name="l00129"></a>00129 <span class="comment"></span>
<a name="l00130"></a>00130 <span class="comment"> Also, platform-specific initialization.</span>
<a name="l00131"></a>00131 <span class="comment"></span>
<a name="l00132"></a>00132 <span class="comment"> @memberof Socket</span>
<a name="l00133"></a>00133 <span class="comment">*/</span>
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="preprocessor">#if PLATFORM(Linux)</span>
<a name="l00136"></a>00136 <span class="preprocessor"></span><span class="keywordtype">void</span> <a class="code" href="classSocket.html#a8fe6ea62ef1e4d30acd1fadeaa3df74d" title="Initializes the Socket class.">socket_init</a>(<span class="keywordtype">void</span>)
<a name="l00137"></a>00137 {
<a name="l00138"></a>00138 <a class="code" href="Log_8h.html#aba64819ead3a2defc230ec7ccf655c4e" title="standard source file name for inclusion in log">log_func</a>(<a class="code" href="classSocket.html#a8fe6ea62ef1e4d30acd1fadeaa3df74d" title="Initializes the Socket class.">socket_init</a>);
<a name="l00139"></a>00139 <a class="code" href="Log_8h.html#a619ac1ab71ab5d1c7e94e03ddbf16d3b" title="log informational record with function identification (see Log::log_fheader)">log_finfo</a>(<span class="stringliteral">"Socket class inicialization"</span>);
<a name="l00140"></a>00140
<a name="l00141"></a>00141 <span class="comment">// don't let the system abort the application when it tries to send bytes</span>
<a name="l00142"></a>00142 <span class="comment">// through a connection already closed by the client</span>
<a name="l00143"></a>00143 signal(SIGPIPE, SIG_IGN);
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145 <span class="preprocessor">#endif</span>
<a name="l00146"></a>00146 <span class="preprocessor"></span>
<a name="l00147"></a>00147 <span class="preprocessor">#if PLATFORM(Windows)</span>
<a name="l00148"></a>00148 <span class="preprocessor"></span>TC2API <span class="keywordtype">void</span> <a class="code" href="classSocket.html#a8fe6ea62ef1e4d30acd1fadeaa3df74d" title="Initializes the Socket class.">socket_init</a>(<span class="keywordtype">void</span>)
<a name="l00149"></a>00149 {
<a name="l00150"></a>00150 WSADATA wsaData;
<a name="l00151"></a>00151
<a name="l00152"></a>00152 <a class="code" href="Log_8h.html#aba64819ead3a2defc230ec7ccf655c4e" title="standard source file name for inclusion in log">log_func</a>(<a class="code" href="classSocket.html#a8fe6ea62ef1e4d30acd1fadeaa3df74d" title="Initializes the Socket class.">socket_init</a>);
<a name="l00153"></a>00153 <a class="code" href="Log_8h.html#a619ac1ab71ab5d1c7e94e03ddbf16d3b" title="log informational record with function identification (see Log::log_fheader)">log_finfo</a>(<span class="stringliteral">"Socket class inicialization"</span>);
<a name="l00154"></a>00154
<a name="l00155"></a>00155 <span class="comment">// mumbo-jumbo needed by Windows</span>
<a name="l00156"></a>00156 <span class="keywordflow">if</span> (WSAStartup(0x202, &wsaData) == <a class="code" href="Socket_8h.html#a114f76181c8d260f8c67f73736a6f232" title="Generic Socket error definition.">E_SOCKET_ERROR</a>)
<a name="l00157"></a>00157 {
<a name="l00158"></a>00158 <span class="comment">// I guess there's nothing more we can do...</span>
<a name="l00159"></a>00159 <span class="keywordtype">int</span> err = socket_error();
<a name="l00160"></a>00160 <a class="code" href="Log_8h.html#a430b89fb69a94dd03ebd174fc7538218" title="log fatal error record with function identification (see Log::log_fheader)">log_ffatal</a>(<span class="stringliteral">"error %d in WSAStartup"</span>, err);
<a name="l00161"></a>00161 WSACleanup();
<a name="l00162"></a>00162 abort();
<a name="l00163"></a>00163 }
<a name="l00164"></a>00164 }
<a name="l00165"></a>00165 <span class="preprocessor">#endif</span>
<a name="l00166"></a>00166 <span class="preprocessor"></span>
<a name="l00167"></a>00167 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00168"></a>00168 <span class="comment">// PUBLIC INTERFACE</span>
<a name="l00169"></a>00169 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00170"></a>00170 <span class="comment"></span>
<a name="l00171"></a>00171 <span class="comment">/** Retrieves the partial number of bytes received up until a timeout.</span>
<a name="l00172"></a>00172 <span class="comment"></span>
<a name="l00173"></a>00173 <span class="comment"> @return</span>
<a name="l00174"></a>00174 <span class="comment"> the number of bytes received up until timeout occured</span>
<a name="l00175"></a>00175 <span class="comment"></span>
<a name="l00176"></a>00176 <span class="comment"> @memberof Socket</span>
<a name="l00177"></a>00177 <span class="comment">*/</span>
<a name="l00178"></a>00178
<a name="l00179"></a><a class="code" href="classSocket.html#aa52c2cece2efbec8249847514a5c65fb">00179</a> TC2API <span class="keywordtype">int</span> <a class="code" href="classSocket.html#aa52c2cece2efbec8249847514a5c65fb" title="Retrieves the partial number of bytes received up until a timeout.">socket_partialLenReceived</a>(<span class="keywordtype">void</span>)
<a name="l00180"></a>00180 {
<a name="l00181"></a>00181 <span class="keywordflow">return</span> partialLenReceived;
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183
<a name="l00184"></a>00184 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00185"></a>00185 <span class="comment">// PUBLIC INTERFACE</span>
<a name="l00186"></a>00186 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00187"></a>00187 <span class="comment"></span>
<a name="l00188"></a>00188 <span class="comment">/** Receives an exact number of bytes from the peer application.</span>
<a name="l00189"></a>00189 <span class="comment"></span>
<a name="l00190"></a>00190 <span class="comment"> @param [in]</span>
<a name="l00191"></a>00191 <span class="comment"> socket : socket descritor</span>
<a name="l00192"></a>00192 <span class="comment"></span>
<a name="l00193"></a>00193 <span class="comment"> @param [out]</span>
<a name="l00194"></a>00194 <span class="comment"> buf : reception buffer</span>
<a name="l00195"></a>00195 <span class="comment"></span>
<a name="l00196"></a>00196 <span class="comment"> @param [in]</span>
<a name="l00197"></a>00197 <span class="comment"> len : number of bytes that <i> must </i> be received in this call</span>
<a name="l00198"></a>00198 <span class="comment"></span>
<a name="l00199"></a>00199 <span class="comment"> @param [in]</span>
<a name="l00200"></a>00200 <span class="comment"> nSeconds : number of seconds in which the buffer <i> must </i> arrive</span>
<a name="l00201"></a>00201 <span class="comment"></span>
<a name="l00202"></a>00202 <span class="comment"> @param [in]</span>
<a name="l00203"></a>00203 <span class="comment"> trace : whether to write a trace of the received bytes</span>
<a name="l00204"></a>00204 <span class="comment"></span>
<a name="l00205"></a>00205 <span class="comment"> @return</span>
<a name="l00206"></a>00206 <span class="comment"> number of bytes received, or 0 if connection closed, or -1 if error</span>
<a name="l00207"></a>00207 <span class="comment"> or -2 if timeout</span>
<a name="l00208"></a>00208 <span class="comment"></span>
<a name="l00209"></a>00209 <span class="comment"> @memberof Socket</span>
<a name="l00210"></a>00210 <span class="comment">*/</span>
<a name="l00211"></a>00211
<a name="l00212"></a><a class="code" href="classSocket.html#adb0941e937d3c17ee2204586cae338c4">00212</a> TC2API <span class="keywordtype">int</span> <a class="code" href="classSocket.html#adb0941e937d3c17ee2204586cae338c4" title="Receives an exact number of bytes from the peer application.">socket_recvBuffer</a>(<span class="keywordtype">int</span> socket, <span class="keywordtype">char</span>* buf, <span class="keywordtype">int</span> len, <a class="code" href="config_8h.html#a91ad9478d81a7aaf2593e8d9c3d06a14" title="unsigned int abbreviation">uint</a> nSeconds,
<a name="l00213"></a>00213 <span class="keywordtype">bool</span> trace)
<a name="l00214"></a>00214 {
<a name="l00215"></a>00215 <a class="code" href="structTimeout.html" title="Structure representing timeout.">Timeout</a> timeout;
<a name="l00216"></a>00216 <span class="keywordtype">int</span> pendingLen = len;
<a name="l00217"></a>00217 <span class="keywordtype">int</span> nEvents, receivedLen = 0;
<a name="l00218"></a>00218
<a name="l00219"></a>00219 <a class="code" href="structTimeout.html#a3c9170878cfae51d9dbf162d3fdcde55" title="Initializes a Timeout structure.">timeout_init</a>(&timeout, nSeconds);
<a name="l00220"></a>00220
<a name="l00221"></a>00221 <a class="code" href="classSocket.html#a9b4ecb9611c4a6b559c7383408bce343" title="Sets socket to nonblocking mode.">socket_setNonBlocking</a>(socket, <span class="keyword">true</span>);
<a name="l00222"></a>00222
<a name="l00223"></a>00223 partialLenReceived = 0;
<a name="l00224"></a>00224
<a name="l00225"></a>00225 <span class="comment">// while there's something to receive</span>
<a name="l00226"></a>00226 <span class="keywordflow">while</span> (pendingLen > 0)
<a name="l00227"></a>00227 {
<a name="l00228"></a>00228 <span class="comment">// waits for some bytes to arrive</span>
<a name="l00229"></a>00229 nEvents = <a class="code" href="classSocket.html#a57c28e0df876528e9511a55e29f3bc00" title="Waits until there&#39;s some bytes available to receive, or timeout occurs.">waitRecvEvent</a>(socket, <a class="code" href="structTimeout.html#ad51f4db38a6040f69a78634768ae4162" title="Queries remaining time (in seconds) in a Timeout structure.">timeout_remaining</a>(&timeout));
<a name="l00230"></a>00230
<a name="l00231"></a>00231 <span class="keywordflow">if</span> (nEvents == -1) <span class="comment">// error</span>
<a name="l00232"></a>00232 {
<a name="l00233"></a>00233 receivedLen = -1;
<a name="l00234"></a>00234 <span class="keywordflow">break</span>;
<a name="l00235"></a>00235 }
<a name="l00236"></a>00236
<a name="l00237"></a>00237 <span class="keywordflow">if</span> (nEvents == 0)
<a name="l00238"></a>00238 {
<a name="l00239"></a>00239 receivedLen = <a class="code" href="Socket_8h.html#ad38171878628c67def4c5bca6a6caf76" title="Generic timeout Socket error.">E_SOCKET_TIMEOUT</a>; <span class="comment">// timeout </span>
<a name="l00240"></a>00240 <span class="keywordflow">break</span>;
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242
<a name="l00243"></a>00243 <span class="comment">// tries to receive the remaining data</span>
<a name="l00244"></a>00244 len = recv(socket, buf, pendingLen, 0);
<a name="l00245"></a>00245
<a name="l00246"></a>00246 <span class="keywordflow">if</span> (len == 0)
<a name="l00247"></a>00247 {
<a name="l00248"></a>00248 receivedLen = 0; <span class="comment">// connection closed</span>
<a name="l00249"></a>00249 <span class="keywordflow">break</span>;
<a name="l00250"></a>00250 }
<a name="l00251"></a>00251
<a name="l00252"></a>00252 <span class="keywordflow">if</span> (len < 0) <span class="comment">// error ?</span>
<a name="l00253"></a>00253 {
<a name="l00254"></a>00254 <span class="keywordtype">int</span> err = socket_error();
<a name="l00255"></a>00255 <span class="keywordflow">if</span> (socket_shouldRetry(err) || socket_wouldBlock(err))
<a name="l00256"></a>00256 <span class="keywordflow">continue</span>;
<a name="l00257"></a>00257 receivedLen = -1; <span class="comment">// error</span>
<a name="l00258"></a>00258 <span class="keywordflow">break</span>;
<a name="l00259"></a>00259 }
<a name="l00260"></a>00260
<a name="l00261"></a>00261 <span class="comment">// ok, got "len" bytes</span>
<a name="l00262"></a>00262 <span class="keywordflow">if</span> (trace)
<a name="l00263"></a>00263 {
<a name="l00264"></a>00264 <a class="code" href="config_8h.html#ab95f123a6c9bcfee6a343170ef8c5f69" title="unsigned short abbreviation">ushort</a> port;
<a name="l00265"></a>00265 <span class="keyword">struct </span>sockaddr_in sa;
<a name="l00266"></a>00266 socklen_t addrlen = <span class="keyword">sizeof</span>(sa);
<a name="l00267"></a>00267 <span class="keywordtype">char</span> bufPort[50];
<a name="l00268"></a>00268 getsockname(socket, (<span class="keyword">struct</span> sockaddr*)&sa, &addrlen);
<a name="l00269"></a>00269 port = htons(sa.sin_port);
<a name="l00270"></a>00270 sprintf(bufPort, <span class="stringliteral">"received in port:%d"</span>, port);
<a name="l00271"></a>00271 <a class="code" href="Log_8h.html#a4a0ef902e85ad80fb25fae140d7dbf96" title="log trace record (see Log::log_writeTrace)">log_trace</a>(bufPort, buf, len);
<a name="l00272"></a>00272 }
<a name="l00273"></a>00273
<a name="l00274"></a>00274 partialLenReceived += len; <span class="comment">// for use by GenericClient</span>
<a name="l00275"></a>00275
<a name="l00276"></a>00276 pendingLen -= len; <span class="comment">// adjusts pending len</span>
<a name="l00277"></a>00277 receivedLen += len; <span class="comment">// adjusts received len so far</span>
<a name="l00278"></a>00278 buf += len; <span class="comment">// advances reception buffer</span>
<a name="l00279"></a>00279
<a name="l00280"></a>00280 } <span class="comment">// while</span>
<a name="l00281"></a>00281
<a name="l00282"></a>00282 <a class="code" href="classSocket.html#a9b4ecb9611c4a6b559c7383408bce343" title="Sets socket to nonblocking mode.">socket_setNonBlocking</a>(socket, <span class="keyword">false</span>);
<a name="l00283"></a>00283 <span class="keywordflow">return</span> receivedLen;
<a name="l00284"></a>00284 }
<a name="l00285"></a>00285
<a name="l00286"></a>00286 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00287"></a>00287 <span class="comment">// PUBLIC INTERFACE</span>
<a name="l00288"></a>00288 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00289"></a>00289 <span class="comment"></span>
<a name="l00290"></a>00290 <span class="comment">/** Sends an exact number of bytes to the peer application.</span>
<a name="l00291"></a>00291 <span class="comment"></span>
<a name="l00292"></a>00292 <span class="comment"> @param [in]</span>
<a name="l00293"></a>00293 <span class="comment"> socket : socket descritor</span>
<a name="l00294"></a>00294 <span class="comment"></span>
<a name="l00295"></a>00295 <span class="comment"> @param [in]</span>
<a name="l00296"></a>00296 <span class="comment"> msgBuf : message buffer</span>
<a name="l00297"></a>00297 <span class="comment"></span>
<a name="l00298"></a>00298 <span class="comment"> @param [in]</span>
<a name="l00299"></a>00299 <span class="comment"> msgLen : number of bytes that <i> must </i> be sent in this call</span>
<a name="l00300"></a>00300 <span class="comment"></span>
<a name="l00301"></a>00301 <span class="comment"> @param [in]</span>
<a name="l00302"></a>00302 <span class="comment"> nSeconds : number of seconds to conclude the operation</span>
<a name="l00303"></a>00303 <span class="comment"></span>
<a name="l00304"></a>00304 <span class="comment"> @param [in]</span>
<a name="l00305"></a>00305 <span class="comment"> trace : whether to write a trace of the bytes sent</span>
<a name="l00306"></a>00306 <span class="comment"></span>
<a name="l00307"></a>00307 <span class="comment"> @return</span>
<a name="l00308"></a>00308 <span class="comment"> number of bytes that were sent, or -1 if error, or -2 if timeout</span>
<a name="l00309"></a>00309 <span class="comment"></span>
<a name="l00310"></a>00310 <span class="comment"> @memberof Socket</span>
<a name="l00311"></a>00311 <span class="comment">*/</span>
<a name="l00312"></a>00312
<a name="l00313"></a><a class="code" href="classSocket.html#a9b2b0db924dff614c6920af6b9879193">00313</a> TC2API <span class="keywordtype">int</span> <a class="code" href="classSocket.html#a9b2b0db924dff614c6920af6b9879193" title="Sends an exact number of bytes to the peer application.">socket_sendBuffer</a>(<span class="keywordtype">int</span> socket, <a class="code" href="config_8h.html#a0f128c3e0c83721af0220c00554e9c4e" title="const char abbreviation">cchar</a>* msgBuf, <span class="keywordtype">int</span> msgLen, <a class="code" href="config_8h.html#a91ad9478d81a7aaf2593e8d9c3d06a14" title="unsigned int abbreviation">uint</a> nSeconds,
<a name="l00314"></a>00314 <span class="keywordtype">bool</span> trace)
<a name="l00315"></a>00315 {
<a name="l00316"></a>00316 <a class="code" href="structTimeout.html" title="Structure representing timeout.">Timeout</a> timeout;
<a name="l00317"></a>00317 <span class="keywordtype">int</span> pendingLen = msgLen;
<a name="l00318"></a>00318 <span class="keywordtype">char</span>* buf = (<span class="keywordtype">char</span>*)msgBuf;
<a name="l00319"></a>00319
<a name="l00320"></a>00320 <a class="code" href="structTimeout.html#a3c9170878cfae51d9dbf162d3fdcde55" title="Initializes a Timeout structure.">timeout_init</a>(&timeout, nSeconds);
<a name="l00321"></a>00321
<a name="l00322"></a>00322 <a class="code" href="classSocket.html#a9b4ecb9611c4a6b559c7383408bce343" title="Sets socket to nonblocking mode.">socket_setNonBlocking</a>(socket, <span class="keyword">true</span>);
<a name="l00323"></a>00323
<a name="l00324"></a>00324 <span class="comment">// tries to send exactly "msgLen" bytes to peer</span>
<a name="l00325"></a>00325 <span class="keywordflow">while</span> (pendingLen > 0)
<a name="l00326"></a>00326 {
<a name="l00327"></a>00327 <span class="keywordtype">int</span> partialLen;
<a name="l00328"></a>00328 <span class="keywordtype">int</span> nEvents = <a class="code" href="classSocket.html#afb85aa9647420dc41874760516f16f4d" title="Waits until it&#39;s possible to send some bytes through the socket without blocking...">waitSendEvent</a>(socket, <a class="code" href="structTimeout.html#ad51f4db38a6040f69a78634768ae4162" title="Queries remaining time (in seconds) in a Timeout structure.">timeout_remaining</a>(&timeout));
<a name="l00329"></a>00329
<a name="l00330"></a>00330 <span class="keywordflow">if</span> (nEvents == -1) <span class="comment">// error</span>
<a name="l00331"></a>00331 {
<a name="l00332"></a>00332 msgLen = -1;
<a name="l00333"></a>00333 <span class="keywordflow">break</span>;
<a name="l00334"></a>00334 }
<a name="l00335"></a>00335
<a name="l00336"></a>00336 <span class="keywordflow">if</span> (nEvents == 0)
<a name="l00337"></a>00337 {
<a name="l00338"></a>00338 msgLen = <a class="code" href="Socket_8h.html#ad38171878628c67def4c5bca6a6caf76" title="Generic timeout Socket error.">E_SOCKET_TIMEOUT</a>; <span class="comment">// timeout </span>
<a name="l00339"></a>00339 <span class="keywordflow">break</span>;
<a name="l00340"></a>00340 }
<a name="l00341"></a>00341
<a name="l00342"></a>00342 <span class="comment">// tries to send the remaining data</span>
<a name="l00343"></a>00343 partialLen = send(socket, buf, pendingLen, 0);
<a name="l00344"></a>00344 <span class="keywordflow">if</span> (partialLen < 0) <span class="comment">// error ?</span>
<a name="l00345"></a>00345 {
<a name="l00346"></a>00346 <span class="keywordtype">int</span> err = socket_error();
<a name="l00347"></a>00347 <span class="keywordflow">if</span> (socket_shouldRetry(err) || socket_wouldBlock(err))
<a name="l00348"></a>00348 <span class="keywordflow">continue</span>;
<a name="l00349"></a>00349 msgLen = -1; <span class="comment">// error</span>
<a name="l00350"></a>00350 <span class="keywordflow">break</span>;
<a name="l00351"></a>00351 }
<a name="l00352"></a>00352
<a name="l00353"></a>00353 <span class="keywordflow">if</span> (trace)
<a name="l00354"></a>00354 {
<a name="l00355"></a>00355 <a class="code" href="config_8h.html#ab95f123a6c9bcfee6a343170ef8c5f69" title="unsigned short abbreviation">ushort</a> port;
<a name="l00356"></a>00356 <span class="keyword">struct </span>sockaddr_in sa;
<a name="l00357"></a>00357 socklen_t addrlen = <span class="keyword">sizeof</span>(sa);
<a name="l00358"></a>00358 <span class="keywordtype">char</span> bufPort[50];
<a name="l00359"></a>00359 getsockname(socket, (<span class="keyword">struct</span> sockaddr*)&sa, &addrlen);
<a name="l00360"></a>00360 port = htons(sa.sin_port);
<a name="l00361"></a>00361 sprintf(bufPort, <span class="stringliteral">"sent from port:%d"</span>, port);
<a name="l00362"></a>00362 <a class="code" href="Log_8h.html#a4a0ef902e85ad80fb25fae140d7dbf96" title="log trace record (see Log::log_writeTrace)">log_trace</a>(bufPort, buf, partialLen);
<a name="l00363"></a>00363 }
<a name="l00364"></a>00364 pendingLen -= partialLen;
<a name="l00365"></a>00365 buf += partialLen;
<a name="l00366"></a>00366 } <span class="comment">// while</span>
<a name="l00367"></a>00367
<a name="l00368"></a>00368 <a class="code" href="classSocket.html#a9b4ecb9611c4a6b559c7383408bce343" title="Sets socket to nonblocking mode.">socket_setNonBlocking</a>(socket, <span class="keyword">false</span>);
<a name="l00369"></a>00369 <span class="keywordflow">return</span> msgLen;
<a name="l00370"></a>00370 }
<a name="l00371"></a>00371
<a name="l00372"></a>00372 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00373"></a>00373 <span class="comment">// PUBLIC INTERFACE</span>
<a name="l00374"></a>00374 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00375"></a>00375 <span class="comment"></span>
<a name="l00376"></a>00376 <span class="comment">/** Sets socket to nonblocking mode.</span>
<a name="l00377"></a>00377 <span class="comment"> @fn void socket_setNonBlocking(int socket, bool nonBlocking)</span>
<a name="l00378"></a>00378 <span class="comment"></span>
<a name="l00379"></a>00379 <span class="comment"> @param [in]</span>
<a name="l00380"></a>00380 <span class="comment"> socket : descriptor of socket to be put in nonblocking mode</span>
<a name="l00381"></a>00381 <span class="comment"></span>
<a name="l00382"></a>00382 <span class="comment"> @param [in]</span>
<a name="l00383"></a>00383 <span class="comment"> nonBlocking : flag that says to enter or leave nonblocking mode</span>
<a name="l00384"></a>00384 <span class="comment"></span>
<a name="l00385"></a>00385 <span class="comment"> @post</span>
<a name="l00386"></a>00386 <span class="comment"> aborts application if not successful</span>
<a name="l00387"></a>00387 <span class="comment"></span>
<a name="l00388"></a>00388 <span class="comment"> @memberof Socket</span>
<a name="l00389"></a>00389 <span class="comment">*/</span>
<a name="l00390"></a>00390
<a name="l00391"></a>00391 <span class="preprocessor">#if PLATFORM(Linux)</span>
<a name="l00392"></a>00392 <span class="preprocessor"></span>TC2API <span class="keywordtype">void</span> <a class="code" href="classSocket.html#a9b4ecb9611c4a6b559c7383408bce343" title="Sets socket to nonblocking mode.">socket_setNonBlocking</a>(<span class="keywordtype">int</span> socket, <span class="keywordtype">bool</span> nonBlocking)
<a name="l00393"></a>00393 {
<a name="l00394"></a>00394 <span class="keywordtype">int</span> flags = fcntl(socket,F_GETFL,0);
<a name="l00395"></a>00395 <span class="keywordflow">if</span> (nonBlocking)
<a name="l00396"></a>00396 flags |= O_NONBLOCK;
<a name="l00397"></a>00397 <span class="keywordflow">else</span>
<a name="l00398"></a>00398 flags &= ~O_NONBLOCK;
<a name="l00399"></a>00399 fcntl(socket, F_SETFL, flags);
<a name="l00400"></a>00400 }
<a name="l00401"></a>00401 <span class="preprocessor">#endif</span>
<a name="l00402"></a>00402 <span class="preprocessor"></span>
<a name="l00403"></a>00403 <span class="preprocessor">#if PLATFORM(Windows)</span>
<a name="l00404"></a>00404 <span class="preprocessor"></span>TC2API <span class="keywordtype">void</span> <a class="code" href="classSocket.html#a9b4ecb9611c4a6b559c7383408bce343" title="Sets socket to nonblocking mode.">socket_setNonBlocking</a>(<span class="keywordtype">int</span> socket, <span class="keywordtype">bool</span> _mode)
<a name="l00405"></a>00405 {
<a name="l00406"></a>00406 <a class="code" href="config_8h.html#a718b4eb2652c286f4d42dc18a8e71a1a" title="unsigned long abbreviation">ulong</a> mode = _mode;
<a name="l00407"></a>00407 ioctlsocket(socket, FIONBIO, &mode);
<a name="l00408"></a>00408 }
<a name="l00409"></a>00409 <span class="preprocessor">#endif</span>
<a name="l00410"></a>00410 <span class="preprocessor"></span>
<a name="l00411"></a>00411 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00412"></a>00412 <span class="comment"></span>
<a name="l00413"></a>00413 <span class="comment">/** Creates a TCP socket.</span>
<a name="l00414"></a>00414 <span class="comment"></span>
<a name="l00415"></a>00415 <span class="comment"> @return</span>
<a name="l00416"></a>00416 <span class="comment"> a TCP socket descriptor</span>
<a name="l00417"></a>00417 <span class="comment"></span>
<a name="l00418"></a>00418 <span class="comment"> @post</span>
<a name="l00419"></a>00419 <span class="comment"> Either succeeds or aborts application</span>
<a name="l00420"></a>00420 <span class="comment"></span>
<a name="l00421"></a>00421 <span class="comment"> @private @memberof Socket</span>
<a name="l00422"></a>00422 <span class="comment">*/</span>
<a name="l00423"></a>00423
<a name="l00424"></a><a class="code" href="classSocket.html#aadd3e5b47036ac0ab8efe79b937146ca">00424</a> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="classSocket.html#aadd3e5b47036ac0ab8efe79b937146ca" title="Creates a TCP socket.">createTCPsocket</a>(<span class="keywordtype">void</span>)
<a name="l00425"></a>00425 {
<a name="l00426"></a>00426 <span class="keywordtype">int</span> tcpSocket;
<a name="l00427"></a>00427
<a name="l00428"></a>00428 <a class="code" href="Log_8h.html#aba64819ead3a2defc230ec7ccf655c4e" title="standard source file name for inclusion in log">log_func</a>(<a class="code" href="classSocket.html#aadd3e5b47036ac0ab8efe79b937146ca" title="Creates a TCP socket.">createTCPsocket</a>);
<a name="l00429"></a>00429 <a class="code" href="Log_8h.html#a619ac1ab71ab5d1c7e94e03ddbf16d3b" title="log informational record with function identification (see Log::log_fheader)">log_finfo</a>(<span class="stringliteral">"creating a TCP socket"</span>);
<a name="l00430"></a>00430
<a name="l00431"></a>00431 <span class="keywordflow">if</span> ((tcpSocket=socket(AF_INET, SOCK_STREAM, 0)) < 0)
<a name="l00432"></a>00432 {
<a name="l00433"></a>00433 <span class="comment">// if we cannot create a socket there's something very wrong with the</span>
<a name="l00434"></a>00434 <span class="comment">// system, so we abort the application</span>
<a name="l00435"></a>00435 <span class="keywordtype">int</span> err = socket_error();
<a name="l00436"></a>00436 <a class="code" href="Log_8h.html#a430b89fb69a94dd03ebd174fc7538218" title="log fatal error record with function identification (see Log::log_fheader)">log_ffatal</a>(<span class="stringliteral">"* error creating socket: %d"</span>, err);
<a name="l00437"></a>00437 abort();
<a name="l00438"></a>00438 }
<a name="l00439"></a>00439
<a name="l00440"></a>00440 <span class="keywordflow">return</span> tcpSocket;
<a name="l00441"></a>00441 }
<a name="l00442"></a>00442
<a name="l00443"></a>00443 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00444"></a>00444 <span class="comment"></span>
<a name="l00445"></a>00445 <span class="comment">/** Waits until there's some bytes available to receive, or timeout occurs.</span>
<a name="l00446"></a>00446 <span class="comment"></span>
<a name="l00447"></a>00447 <span class="comment"> @param [in]</span>
<a name="l00448"></a>00448 <span class="comment"> socket : connected socket descriptor</span>
<a name="l00449"></a>00449 <span class="comment"></span>
<a name="l00450"></a>00450 <span class="comment"> @param [in]</span>
<a name="l00451"></a>00451 <span class="comment"> nSeconds : timeout to wait until some bytes are available</span>
<a name="l00452"></a>00452 <span class="comment"></span>
<a name="l00453"></a>00453 <span class="comment"> @return</span>
<a name="l00454"></a>00454 <span class="comment"> number of events available (-1, 0, 1)</span>
<a name="l00455"></a>00455 <span class="comment"></span>
<a name="l00456"></a>00456 <span class="comment"> @private @memberof Socket</span>
<a name="l00457"></a>00457 <span class="comment">*/</span>
<a name="l00458"></a>00458
<a name="l00459"></a><a class="code" href="classSocket.html#a57c28e0df876528e9511a55e29f3bc00">00459</a> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="classSocket.html#a57c28e0df876528e9511a55e29f3bc00" title="Waits until there&#39;s some bytes available to receive, or timeout occurs.">waitRecvEvent</a>(<span class="keywordtype">int</span> socket, <a class="code" href="config_8h.html#a91ad9478d81a7aaf2593e8d9c3d06a14" title="unsigned int abbreviation">uint</a> nSeconds)
<a name="l00460"></a>00460 {
<a name="l00461"></a>00461 fd_set readfds;
<a name="l00462"></a>00462 <span class="keyword">struct </span>timeval timeout = { nSeconds, 0 };
<a name="l00463"></a>00463 <span class="keyword">struct </span>timeval* pTimeout = (nSeconds == <a class="code" href="Timeout_8h.html#a3b78ef6eaf8bf61492b4f4d89bd5181c" title="No timeout.">TIMEOUT_WAIT_FOREVER</a>) ? NULL
<a name="l00464"></a>00464 : &timeout;
<a name="l00465"></a>00465
<a name="l00466"></a>00466 FD_ZERO(&readfds);
<a name="l00467"></a>00467 FD_SET(socket,&readfds);
<a name="l00468"></a>00468
<a name="l00469"></a>00469 <span class="keywordflow">return</span> select(socket+1, &readfds, NULL, NULL, pTimeout);
<a name="l00470"></a>00470 }
<a name="l00471"></a>00471
<a name="l00472"></a>00472 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00473"></a>00473 <span class="comment"></span>
<a name="l00474"></a>00474 <span class="comment">/** Waits until it's possible to send some bytes through the socket without</span>
<a name="l00475"></a>00475 <span class="comment"> blocking.</span>
<a name="l00476"></a>00476 <span class="comment"></span>
<a name="l00477"></a>00477 <span class="comment"> @param [in]</span>
<a name="l00478"></a>00478 <span class="comment"> socket : connected socket descriptor</span>
<a name="l00479"></a>00479 <span class="comment"></span>
<a name="l00480"></a>00480 <span class="comment"> @param [in]</span>
<a name="l00481"></a>00481 <span class="comment"> nSeconds : timeout to wait until the send event occurs</span>
<a name="l00482"></a>00482 <span class="comment"></span>
<a name="l00483"></a>00483 <span class="comment"> @return</span>
<a name="l00484"></a>00484 <span class="comment"> number of events available (-1, 0, 1)</span>
<a name="l00485"></a>00485 <span class="comment"></span>
<a name="l00486"></a>00486 <span class="comment"> @private @memberof Socket</span>
<a name="l00487"></a>00487 <span class="comment">*/</span>
<a name="l00488"></a>00488
<a name="l00489"></a><a class="code" href="classSocket.html#afb85aa9647420dc41874760516f16f4d">00489</a> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="classSocket.html#afb85aa9647420dc41874760516f16f4d" title="Waits until it&#39;s possible to send some bytes through the socket without blocking...">waitSendEvent</a>(<span class="keywordtype">int</span> socket, <a class="code" href="config_8h.html#a91ad9478d81a7aaf2593e8d9c3d06a14" title="unsigned int abbreviation">uint</a> nSeconds)
<a name="l00490"></a>00490 {
<a name="l00491"></a>00491 fd_set writefds;
<a name="l00492"></a>00492 <span class="keyword">struct </span>timeval timeout = { nSeconds, 0 };
<a name="l00493"></a>00493 <span class="keyword">struct </span>timeval* pTimeout = (nSeconds == <a class="code" href="Timeout_8h.html#a3b78ef6eaf8bf61492b4f4d89bd5181c" title="No timeout.">TIMEOUT_WAIT_FOREVER</a>) ? NULL
<a name="l00494"></a>00494 : &timeout;
<a name="l00495"></a>00495
<a name="l00496"></a>00496 FD_ZERO(&writefds);
<a name="l00497"></a>00497 FD_SET(socket,&writefds);
<a name="l00498"></a>00498
<a name="l00499"></a>00499 <span class="keywordflow">return</span> select(socket+1, NULL, &writefds, NULL, pTimeout);
<a name="l00500"></a>00500 }
<a name="l00501"></a>00501
<a name="l00502"></a>00502 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00503"></a>00503 <span class="comment">// the end</span>
</pre></div></div>
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