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<h1>SocketTCP.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001
<a name="l00002"></a>00002 <span class="comment">//</span>
<a name="l00003"></a>00003 <span class="comment">// SFML - Simple and Fast Multimedia Library</span>
<a name="l00004"></a>00004 <span class="comment">// Copyright (C) 2007-2009 Laurent Gomila (laurent.gom@gmail.com)</span>
<a name="l00005"></a>00005 <span class="comment">//</span>
<a name="l00006"></a>00006 <span class="comment">// This software is provided 'as-is', without any express or implied warranty.</span>
<a name="l00007"></a>00007 <span class="comment">// In no event will the authors be held liable for any damages arising from the use of this software.</span>
<a name="l00008"></a>00008 <span class="comment">//</span>
<a name="l00009"></a>00009 <span class="comment">// Permission is granted to anyone to use this software for any purpose,</span>
<a name="l00010"></a>00010 <span class="comment">// including commercial applications, and to alter it and redistribute it freely,</span>
<a name="l00011"></a>00011 <span class="comment">// subject to the following restrictions:</span>
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// 1. The origin of this software must not be misrepresented;</span>
<a name="l00014"></a>00014 <span class="comment">// you must not claim that you wrote the original software.</span>
<a name="l00015"></a>00015 <span class="comment">// If you use this software in a product, an acknowledgment</span>
<a name="l00016"></a>00016 <span class="comment">// in the product documentation would be appreciated but is not required.</span>
<a name="l00017"></a>00017 <span class="comment">//</span>
<a name="l00018"></a>00018 <span class="comment">// 2. Altered source versions must be plainly marked as such,</span>
<a name="l00019"></a>00019 <span class="comment">// and must not be misrepresented as being the original software.</span>
<a name="l00020"></a>00020 <span class="comment">//</span>
<a name="l00021"></a>00021 <span class="comment">// 3. This notice may not be removed or altered from any source distribution.</span>
<a name="l00022"></a>00022 <span class="comment">//</span>
<a name="l00024"></a>00024 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment">// Headers</span>
<a name="l00028"></a>00028 <span class="comment"></span><span class="preprocessor">#include <SFML/Network/SocketTCP.hpp></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <SFML/Network/IPAddress.hpp></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include <SFML/Network/Packet.hpp></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <SFML/Network/SocketHelper.hpp></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <algorithm></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <iostream></span>
<a name="l00034"></a>00034 <span class="preprocessor">#include <string.h></span>
<a name="l00035"></a>00035
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="preprocessor">#ifdef _MSC_VER</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span><span class="preprocessor"> #pragma warning(disable : 4127) // "conditional expression is constant" generated by the FD_SET macro</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00040"></a>00040 <span class="preprocessor"></span>
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="keyword">namespace </span>sf
<a name="l00043"></a>00043 {
<a name="l00047"></a><a class="code" href="classsf_1_1SocketTCP.htm#098157a901a6f355b499085a3fb97afa">00047</a> <a class="code" href="classsf_1_1SocketTCP.htm#098157a901a6f355b499085a3fb97afa" title="Default constructor.">SocketTCP::SocketTCP</a>()
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 Create(<a class="code" href="classsf_1_1SocketHelper.htm#99e426a217cc8847264f837632b4e458" title="Return the value of the invalid socket.">SocketHelper::InvalidSocket</a>());
<a name="l00050"></a>00050 }
<a name="l00051"></a>00051
<a name="l00052"></a>00052
<a name="l00056"></a><a class="code" href="classsf_1_1SocketTCP.htm#a80f7711b15fe33a5c7005acedae43c9">00056</a> <span class="keywordtype">void</span> <a class="code" href="classsf_1_1SocketTCP.htm#a80f7711b15fe33a5c7005acedae43c9" title="Change the blocking state of the socket.">SocketTCP::SetBlocking</a>(<span class="keywordtype">bool</span> Blocking)
<a name="l00057"></a>00057 {
<a name="l00058"></a>00058 <span class="comment">// Make sure our socket is valid</span>
<a name="l00059"></a>00059 <span class="keywordflow">if</span> (!<a class="code" href="classsf_1_1SocketTCP.htm#098d613057a72d9e5cfa76a77b5f7124" title="Check if the socket is in a valid state ; this function can be called any time to...">IsValid</a>())
<a name="l00060"></a>00060 Create();
<a name="l00061"></a>00061
<a name="l00062"></a>00062 <a class="code" href="classsf_1_1SocketTCP.htm#a80f7711b15fe33a5c7005acedae43c9" title="Change the blocking state of the socket.">SocketHelper::SetBlocking</a>(mySocket, Blocking);
<a name="l00063"></a>00063 myIsBlocking = Blocking;
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065
<a name="l00066"></a>00066
<a name="l00070"></a><a class="code" href="classsf_1_1SocketTCP.htm#dd590d0119fa8edbe8da1574b6c8f07f">00070</a> Socket::Status <a class="code" href="classsf_1_1SocketTCP.htm#dd590d0119fa8edbe8da1574b6c8f07f" title="Connect to another computer on a specified port.">SocketTCP::Connect</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> Port, <span class="keyword">const</span> <a class="code" href="classsf_1_1IPAddress.htm" title="IPAddress provides easy manipulation of IP v4 addresses.">IPAddress</a>& HostAddress, <span class="keywordtype">float</span> Timeout)
<a name="l00071"></a>00071 {
<a name="l00072"></a>00072 <span class="comment">// Make sure our socket is valid</span>
<a name="l00073"></a>00073 <span class="keywordflow">if</span> (!<a class="code" href="classsf_1_1SocketTCP.htm#098d613057a72d9e5cfa76a77b5f7124" title="Check if the socket is in a valid state ; this function can be called any time to...">IsValid</a>())
<a name="l00074"></a>00074 Create();
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <span class="comment">// Build the host address</span>
<a name="l00077"></a>00077 sockaddr_in SockAddr;
<a name="l00078"></a>00078 memset(SockAddr.sin_zero, 0, <span class="keyword">sizeof</span>(SockAddr.sin_zero));
<a name="l00079"></a>00079 SockAddr.sin_addr.s_addr = inet_addr(HostAddress.<a class="code" href="classsf_1_1IPAddress.htm#76eadca85be545b5c1c68a4d0dc1c643" title="Get a string representation of the address.">ToString</a>().c_str());
<a name="l00080"></a>00080 SockAddr.sin_family = AF_INET;
<a name="l00081"></a>00081 SockAddr.sin_port = htons(Port);
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="keywordflow">if</span> (Timeout <= 0)
<a name="l00084"></a>00084 {
<a name="l00085"></a>00085 <span class="comment">// ----- We're not using a timeout : just try to connect -----</span>
<a name="l00086"></a>00086
<a name="l00087"></a>00087 <span class="keywordflow">if</span> (connect(mySocket, reinterpret_cast<sockaddr*>(&SockAddr), <span class="keyword">sizeof</span>(SockAddr)) == -1)
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 <span class="comment">// Failed to connect</span>
<a name="l00090"></a>00090 <span class="keywordflow">return</span> <a class="code" href="classsf_1_1SocketHelper.htm#7e634801c53a5a1b2ee16757e2d96a83" title="Get the last socket error status.">SocketHelper::GetErrorStatus</a>();
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="comment">// Connection succeeded</span>
<a name="l00094"></a>00094 <span class="keywordflow">return</span> Socket::Done;
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096 <span class="keywordflow">else</span>
<a name="l00097"></a>00097 {
<a name="l00098"></a>00098 <span class="comment">// ----- We're using a timeout : we'll need a few tricks to make it work -----</span>
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="comment">// Save the previous blocking state</span>
<a name="l00101"></a>00101 <span class="keywordtype">bool</span> IsBlocking = myIsBlocking;
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="comment">// Switch to non-blocking to enable our connection timeout</span>
<a name="l00104"></a>00104 <span class="keywordflow">if</span> (IsBlocking)
<a name="l00105"></a>00105 <a class="code" href="classsf_1_1SocketTCP.htm#a80f7711b15fe33a5c7005acedae43c9" title="Change the blocking state of the socket.">SetBlocking</a>(<span class="keyword">false</span>);
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="comment">// Try to connect to host</span>
<a name="l00108"></a>00108 <span class="keywordflow">if</span> (connect(mySocket, reinterpret_cast<sockaddr*>(&SockAddr), <span class="keyword">sizeof</span>(SockAddr)) >= 0)
<a name="l00109"></a>00109 {
<a name="l00110"></a>00110 <span class="comment">// We got instantly connected! (it may no happen a lot...)</span>
<a name="l00111"></a>00111 <span class="keywordflow">return</span> Socket::Done;
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113
<a name="l00114"></a>00114 <span class="comment">// Get the error status</span>
<a name="l00115"></a>00115 Socket::Status Status = <a class="code" href="classsf_1_1SocketHelper.htm#7e634801c53a5a1b2ee16757e2d96a83" title="Get the last socket error status.">SocketHelper::GetErrorStatus</a>();
<a name="l00116"></a>00116
<a name="l00117"></a>00117 <span class="comment">// If we were in non-blocking mode, return immediatly</span>
<a name="l00118"></a>00118 <span class="keywordflow">if</span> (!IsBlocking)
<a name="l00119"></a>00119 <span class="keywordflow">return</span> Status;
<a name="l00120"></a>00120
<a name="l00121"></a>00121 <span class="comment">// Otherwise, wait until something happens to our socket (success, timeout or error)</span>
<a name="l00122"></a>00122 <span class="keywordflow">if</span> (Status == Socket::NotReady)
<a name="l00123"></a>00123 {
<a name="l00124"></a>00124 <span class="comment">// Setup the selector</span>
<a name="l00125"></a>00125 fd_set <a class="code" href="classsf_1_1Selector.htm" title="Selector allow reading from multiple sockets without blocking.">Selector</a>;
<a name="l00126"></a>00126 FD_ZERO(&Selector);
<a name="l00127"></a>00127 FD_SET(mySocket, &Selector);
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <span class="comment">// Setup the timeout</span>
<a name="l00130"></a>00130 timeval Time;
<a name="l00131"></a>00131 Time.tv_sec = <span class="keyword">static_cast<</span><span class="keywordtype">long</span><span class="keyword">></span>(Timeout);
<a name="l00132"></a>00132 Time.tv_usec = (<span class="keyword">static_cast<</span><span class="keywordtype">long</span><span class="keyword">></span>(Timeout * 1000) % 1000) * 1000;
<a name="l00133"></a>00133
<a name="l00134"></a>00134 <span class="comment">// Wait for something to write on our socket (would mean the connection has been accepted)</span>
<a name="l00135"></a>00135 <span class="keywordflow">if</span> (select(static_cast<int>(mySocket + 1), NULL, &Selector, NULL, &Time) > 0)
<a name="l00136"></a>00136 {
<a name="l00137"></a>00137 <span class="comment">// Connection succeeded</span>
<a name="l00138"></a>00138 Status = Socket::Done;
<a name="l00139"></a>00139 }
<a name="l00140"></a>00140 <span class="keywordflow">else</span>
<a name="l00141"></a>00141 {
<a name="l00142"></a>00142 <span class="comment">// Failed to connect before timeout is over</span>
<a name="l00143"></a>00143 Status = <a class="code" href="classsf_1_1SocketHelper.htm#7e634801c53a5a1b2ee16757e2d96a83" title="Get the last socket error status.">SocketHelper::GetErrorStatus</a>();
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145 }
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="comment">// Switch back to blocking mode</span>
<a name="l00148"></a>00148 <a class="code" href="classsf_1_1SocketTCP.htm#a80f7711b15fe33a5c7005acedae43c9" title="Change the blocking state of the socket.">SetBlocking</a>(<span class="keyword">true</span>);
<a name="l00149"></a>00149
<a name="l00150"></a>00150 <span class="keywordflow">return</span> Status;
<a name="l00151"></a>00151 }
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153
<a name="l00154"></a>00154
<a name="l00158"></a><a class="code" href="classsf_1_1SocketTCP.htm#3153062e1fb2a7afe9e0ed80f9204b39">00158</a> <span class="keywordtype">bool</span> <a class="code" href="classsf_1_1SocketTCP.htm#3153062e1fb2a7afe9e0ed80f9204b39" title="Listen to a specified port for incoming data or connections.">SocketTCP::Listen</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> Port)
<a name="l00159"></a>00159 {
<a name="l00160"></a>00160 <span class="comment">// Make sure our socket is valid</span>
<a name="l00161"></a>00161 <span class="keywordflow">if</span> (!<a class="code" href="classsf_1_1SocketTCP.htm#098d613057a72d9e5cfa76a77b5f7124" title="Check if the socket is in a valid state ; this function can be called any time to...">IsValid</a>())
<a name="l00162"></a>00162 Create();
<a name="l00163"></a>00163
<a name="l00164"></a>00164 <span class="comment">// Build the address</span>
<a name="l00165"></a>00165 sockaddr_in SockAddr;
<a name="l00166"></a>00166 memset(SockAddr.sin_zero, 0, <span class="keyword">sizeof</span>(SockAddr.sin_zero));
<a name="l00167"></a>00167 SockAddr.sin_addr.s_addr = htonl(INADDR_ANY);
<a name="l00168"></a>00168 SockAddr.sin_family = AF_INET;
<a name="l00169"></a>00169 SockAddr.sin_port = htons(Port);
<a name="l00170"></a>00170
<a name="l00171"></a>00171 <span class="comment">// Bind the socket to the specified port</span>
<a name="l00172"></a>00172 <span class="keywordflow">if</span> (bind(mySocket, reinterpret_cast<sockaddr*>(&SockAddr), <span class="keyword">sizeof</span>(SockAddr)) == -1)
<a name="l00173"></a>00173 {
<a name="l00174"></a>00174 <span class="comment">// Not likely to happen, but...</span>
<a name="l00175"></a>00175 std::cerr << <span class="stringliteral">"Failed to bind socket to port "</span> << Port << std::endl;
<a name="l00176"></a>00176 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178
<a name="l00179"></a>00179 <span class="comment">// Listen to the bound port</span>
<a name="l00180"></a>00180 <span class="keywordflow">if</span> (listen(mySocket, 0) == -1)
<a name="l00181"></a>00181 {
<a name="l00182"></a>00182 <span class="comment">// Oops, socket is deaf</span>
<a name="l00183"></a>00183 std::cerr << <span class="stringliteral">"Failed to listen to port "</span> << Port << std::endl;
<a name="l00184"></a>00184 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00185"></a>00185 }
<a name="l00186"></a>00186
<a name="l00187"></a>00187 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189
<a name="l00190"></a>00190
<a name="l00195"></a><a class="code" href="classsf_1_1SocketTCP.htm#70beb8cda69c4e9212fd5987f0d04107">00195</a> Socket::Status <a class="code" href="classsf_1_1SocketTCP.htm#70beb8cda69c4e9212fd5987f0d04107" title="Wait for a connection (must be listening to a port).">SocketTCP::Accept</a>(<a class="code" href="classsf_1_1SocketTCP.htm" title="SocketTCP wraps a socket using TCP protocol to send data safely (but a bit slower)...">SocketTCP</a>& Connected, <a class="code" href="classsf_1_1IPAddress.htm" title="IPAddress provides easy manipulation of IP v4 addresses.">IPAddress</a>* Address)
<a name="l00196"></a>00196 {
<a name="l00197"></a>00197 <span class="comment">// Address that will be filled with client informations</span>
<a name="l00198"></a>00198 sockaddr_in ClientAddress;
<a name="l00199"></a>00199 SocketHelper::LengthType Length = <span class="keyword">sizeof</span>(ClientAddress);
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <span class="comment">// Accept a new connection</span>
<a name="l00202"></a>00202 Connected = accept(mySocket, reinterpret_cast<sockaddr*>(&ClientAddress), &Length);
<a name="l00203"></a>00203
<a name="l00204"></a>00204 <span class="comment">// Check errors</span>
<a name="l00205"></a>00205 <span class="keywordflow">if</span> (!Connected.<a class="code" href="classsf_1_1SocketTCP.htm#098d613057a72d9e5cfa76a77b5f7124" title="Check if the socket is in a valid state ; this function can be called any time to...">IsValid</a>())
<a name="l00206"></a>00206 {
<a name="l00207"></a>00207 <span class="keywordflow">if</span> (Address)
<a name="l00208"></a>00208 *Address = <a class="code" href="classsf_1_1IPAddress.htm" title="IPAddress provides easy manipulation of IP v4 addresses.">IPAddress</a>();
<a name="l00209"></a>00209
<a name="l00210"></a>00210 <span class="keywordflow">return</span> <a class="code" href="classsf_1_1SocketHelper.htm#7e634801c53a5a1b2ee16757e2d96a83" title="Get the last socket error status.">SocketHelper::GetErrorStatus</a>();
<a name="l00211"></a>00211 }
<a name="l00212"></a>00212
<a name="l00213"></a>00213 <span class="comment">// Fill address if requested</span>
<a name="l00214"></a>00214 <span class="keywordflow">if</span> (Address)
<a name="l00215"></a>00215 *Address = <a class="code" href="classsf_1_1IPAddress.htm" title="IPAddress provides easy manipulation of IP v4 addresses.">IPAddress</a>(inet_ntoa(ClientAddress.sin_addr));
<a name="l00216"></a>00216
<a name="l00217"></a>00217 <span class="keywordflow">return</span> Socket::Done;
<a name="l00218"></a>00218 }
<a name="l00219"></a>00219
<a name="l00220"></a>00220
<a name="l00224"></a><a class="code" href="classsf_1_1SocketTCP.htm#4debed568966f75e3e63a70f08e67c21">00224</a> Socket::Status <a class="code" href="classsf_1_1SocketTCP.htm#4debed568966f75e3e63a70f08e67c21" title="Send an array of bytes to the host (must be connected first).">SocketTCP::Send</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* Data, std::size_t Size)
<a name="l00225"></a>00225 {
<a name="l00226"></a>00226 <span class="comment">// First check that socket is valid</span>
<a name="l00227"></a>00227 <span class="keywordflow">if</span> (!<a class="code" href="classsf_1_1SocketTCP.htm#098d613057a72d9e5cfa76a77b5f7124" title="Check if the socket is in a valid state ; this function can be called any time to...">IsValid</a>())
<a name="l00228"></a>00228 <span class="keywordflow">return</span> Socket::Error;
<a name="l00229"></a>00229
<a name="l00230"></a>00230 <span class="comment">// Check parameters</span>
<a name="l00231"></a>00231 <span class="keywordflow">if</span> (Data && Size)
<a name="l00232"></a>00232 {
<a name="l00233"></a>00233 <span class="comment">// Loop until every byte has been sent</span>
<a name="l00234"></a>00234 <span class="keywordtype">int</span> Sent = 0;
<a name="l00235"></a>00235 <span class="keywordtype">int</span> SizeToSend = <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(Size);
<a name="l00236"></a>00236 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> Length = 0; Length < SizeToSend; Length += Sent)
<a name="l00237"></a>00237 {
<a name="l00238"></a>00238 <span class="comment">// Send a chunk of data</span>
<a name="l00239"></a>00239 Sent = send(mySocket, Data + Length, SizeToSend - Length, 0);
<a name="l00240"></a>00240
<a name="l00241"></a>00241 <span class="comment">// Check if an error occured</span>
<a name="l00242"></a>00242 <span class="keywordflow">if</span> (Sent <= 0)
<a name="l00243"></a>00243 <span class="keywordflow">return</span> <a class="code" href="classsf_1_1SocketHelper.htm#7e634801c53a5a1b2ee16757e2d96a83" title="Get the last socket error status.">SocketHelper::GetErrorStatus</a>();
<a name="l00244"></a>00244 }
<a name="l00245"></a>00245
<a name="l00246"></a>00246 <span class="keywordflow">return</span> Socket::Done;
<a name="l00247"></a>00247 }
<a name="l00248"></a>00248 <span class="keywordflow">else</span>
<a name="l00249"></a>00249 {
<a name="l00250"></a>00250 <span class="comment">// Error...</span>
<a name="l00251"></a>00251 std::cerr << <span class="stringliteral">"Cannot send data over the network (invalid parameters)"</span> << std::endl;
<a name="l00252"></a>00252 <span class="keywordflow">return</span> Socket::Error;
<a name="l00253"></a>00253 }
<a name="l00254"></a>00254 }
<a name="l00255"></a>00255
<a name="l00256"></a>00256
<a name="l00261"></a><a class="code" href="classsf_1_1SocketTCP.htm#47027b00ab5589017a5c235f2deb3ab0">00261</a> Socket::Status <a class="code" href="classsf_1_1SocketTCP.htm#47027b00ab5589017a5c235f2deb3ab0" title="Receive an array of bytes from the host (must be connected first).">SocketTCP::Receive</a>(<span class="keywordtype">char</span>* Data, std::size_t MaxSize, std::size_t& SizeReceived)
<a name="l00262"></a>00262 {
<a name="l00263"></a>00263 <span class="comment">// First clear the size received</span>
<a name="l00264"></a>00264 SizeReceived = 0;
<a name="l00265"></a>00265
<a name="l00266"></a>00266 <span class="comment">// Check that socket is valid</span>
<a name="l00267"></a>00267 <span class="keywordflow">if</span> (!<a class="code" href="classsf_1_1SocketTCP.htm#098d613057a72d9e5cfa76a77b5f7124" title="Check if the socket is in a valid state ; this function can be called any time to...">IsValid</a>())
<a name="l00268"></a>00268 <span class="keywordflow">return</span> Socket::Error;
<a name="l00269"></a>00269
<a name="l00270"></a>00270 <span class="comment">// Check parameters</span>
<a name="l00271"></a>00271 <span class="keywordflow">if</span> (Data && MaxSize)
<a name="l00272"></a>00272 {
<a name="l00273"></a>00273 <span class="comment">// Receive a chunk of bytes</span>
<a name="l00274"></a>00274 <span class="keywordtype">int</span> Received = recv(mySocket, Data, static_cast<int>(MaxSize), 0);
<a name="l00275"></a>00275
<a name="l00276"></a>00276 <span class="comment">// Check the number of bytes received</span>
<a name="l00277"></a>00277 <span class="keywordflow">if</span> (Received > 0)
<a name="l00278"></a>00278 {
<a name="l00279"></a>00279 SizeReceived = <span class="keyword">static_cast<</span>std::size_t<span class="keyword">></span>(Received);
<a name="l00280"></a>00280 <span class="keywordflow">return</span> Socket::Done;
<a name="l00281"></a>00281 }
<a name="l00282"></a>00282 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (Received == 0)
<a name="l00283"></a>00283 {
<a name="l00284"></a>00284 <span class="keywordflow">return</span> Socket::Disconnected;
<a name="l00285"></a>00285 }
<a name="l00286"></a>00286 <span class="keywordflow">else</span>
<a name="l00287"></a>00287 {
<a name="l00288"></a>00288 <span class="keywordflow">return</span> <a class="code" href="classsf_1_1SocketHelper.htm#7e634801c53a5a1b2ee16757e2d96a83" title="Get the last socket error status.">SocketHelper::GetErrorStatus</a>();
<a name="l00289"></a>00289 }
<a name="l00290"></a>00290 }
<a name="l00291"></a>00291 <span class="keywordflow">else</span>
<a name="l00292"></a>00292 {
<a name="l00293"></a>00293 <span class="comment">// Error...</span>
<a name="l00294"></a>00294 std::cerr << <span class="stringliteral">"Cannot receive data from the network (invalid parameters)"</span> << std::endl;
<a name="l00295"></a>00295 <span class="keywordflow">return</span> Socket::Error;
<a name="l00296"></a>00296 }
<a name="l00297"></a>00297 }
<a name="l00298"></a>00298
<a name="l00299"></a>00299
<a name="l00303"></a><a class="code" href="classsf_1_1SocketTCP.htm#a1825883276970b3d2f9b1d61763e5c7">00303</a> Socket::Status <a class="code" href="classsf_1_1SocketTCP.htm#4debed568966f75e3e63a70f08e67c21" title="Send an array of bytes to the host (must be connected first).">SocketTCP::Send</a>(<a class="code" href="classsf_1_1Packet.htm" title="Packet wraps data to send / to receive through the network.">Packet</a>& PacketToSend)
<a name="l00304"></a>00304 {
<a name="l00305"></a>00305 <span class="comment">// Get the data to send from the packet</span>
<a name="l00306"></a>00306 std::size_t DataSize = 0;
<a name="l00307"></a>00307 <span class="keyword">const</span> <span class="keywordtype">char</span>* Data = PacketToSend.<a class="code" href="classsf_1_1Packet.htm#f7572423964fc3baf9ca9fe1e5a28993" title="Called before the packet is sent to the network.">OnSend</a>(DataSize);
<a name="l00308"></a>00308
<a name="l00309"></a>00309 <span class="comment">// Send the packet size</span>
<a name="l00310"></a>00310 Uint32 PacketSize = htonl(static_cast<unsigned long>(DataSize));
<a name="l00311"></a>00311 <a class="code" href="classsf_1_1SocketTCP.htm#4debed568966f75e3e63a70f08e67c21" title="Send an array of bytes to the host (must be connected first).">Send</a>(reinterpret_cast<const char*>(&PacketSize), <span class="keyword">sizeof</span>(PacketSize));
<a name="l00312"></a>00312
<a name="l00313"></a>00313 <span class="comment">// Send the packet data</span>
<a name="l00314"></a>00314 <span class="keywordflow">if</span> (PacketSize > 0)
<a name="l00315"></a>00315 {
<a name="l00316"></a>00316 <span class="keywordflow">return</span> <a class="code" href="classsf_1_1SocketTCP.htm#4debed568966f75e3e63a70f08e67c21" title="Send an array of bytes to the host (must be connected first).">Send</a>(Data, DataSize);
<a name="l00317"></a>00317 }
<a name="l00318"></a>00318 <span class="keywordflow">else</span>
<a name="l00319"></a>00319 {
<a name="l00320"></a>00320 <span class="keywordflow">return</span> Socket::Done;
<a name="l00321"></a>00321 }
<a name="l00322"></a>00322 }
<a name="l00323"></a>00323
<a name="l00324"></a>00324
<a name="l00329"></a><a class="code" href="classsf_1_1SocketTCP.htm#4389aa92523e0a6b3f2d6517cbde74fa">00329</a> Socket::Status <a class="code" href="classsf_1_1SocketTCP.htm#47027b00ab5589017a5c235f2deb3ab0" title="Receive an array of bytes from the host (must be connected first).">SocketTCP::Receive</a>(<a class="code" href="classsf_1_1Packet.htm" title="Packet wraps data to send / to receive through the network.">Packet</a>& PacketToReceive)
<a name="l00330"></a>00330 {
<a name="l00331"></a>00331 <span class="comment">// We start by getting the size of the incoming packet</span>
<a name="l00332"></a>00332 Uint32 PacketSize = 0;
<a name="l00333"></a>00333 std::size_t Received = 0;
<a name="l00334"></a>00334 <span class="keywordflow">if</span> (myPendingPacketSize < 0)
<a name="l00335"></a>00335 {
<a name="l00336"></a>00336 Socket::Status Status = <a class="code" href="classsf_1_1SocketTCP.htm#47027b00ab5589017a5c235f2deb3ab0" title="Receive an array of bytes from the host (must be connected first).">Receive</a>(reinterpret_cast<char*>(&PacketSize), <span class="keyword">sizeof</span>(PacketSize), Received);
<a name="l00337"></a>00337 <span class="keywordflow">if</span> (Status != Socket::Done)
<a name="l00338"></a>00338 <span class="keywordflow">return</span> Status;
<a name="l00339"></a>00339
<a name="l00340"></a>00340 PacketSize = ntohl(PacketSize);
<a name="l00341"></a>00341 }
<a name="l00342"></a>00342 <span class="keywordflow">else</span>
<a name="l00343"></a>00343 {
<a name="l00344"></a>00344 <span class="comment">// There is a pending packet : we already know its size</span>
<a name="l00345"></a>00345 PacketSize = myPendingPacketSize;
<a name="l00346"></a>00346 }
<a name="l00347"></a>00347
<a name="l00348"></a>00348 <span class="comment">// Then loop until we receive all the packet data</span>
<a name="l00349"></a>00349 <span class="keywordtype">char</span> Buffer[1024];
<a name="l00350"></a>00350 <span class="keywordflow">while</span> (myPendingPacket.size() < PacketSize)
<a name="l00351"></a>00351 {
<a name="l00352"></a>00352 <span class="comment">// Receive a chunk of data</span>
<a name="l00353"></a>00353 std::size_t SizeToGet = std::min(static_cast<std::size_t>(PacketSize - myPendingPacket.size()), <span class="keyword">sizeof</span>(Buffer));
<a name="l00354"></a>00354 Socket::Status Status = <a class="code" href="classsf_1_1SocketTCP.htm#47027b00ab5589017a5c235f2deb3ab0" title="Receive an array of bytes from the host (must be connected first).">Receive</a>(Buffer, SizeToGet, Received);
<a name="l00355"></a>00355 <span class="keywordflow">if</span> (Status != Socket::Done)
<a name="l00356"></a>00356 {
<a name="l00357"></a>00357 <span class="comment">// We must save the size of the pending packet until we can receive its content</span>
<a name="l00358"></a>00358 <span class="keywordflow">if</span> (Status == Socket::NotReady)
<a name="l00359"></a>00359 myPendingPacketSize = PacketSize;
<a name="l00360"></a>00360 <span class="keywordflow">return</span> Status;
<a name="l00361"></a>00361 }
<a name="l00362"></a>00362
<a name="l00363"></a>00363 <span class="comment">// Append it into the packet</span>
<a name="l00364"></a>00364 <span class="keywordflow">if</span> (Received > 0)
<a name="l00365"></a>00365 {
<a name="l00366"></a>00366 myPendingPacket.resize(myPendingPacket.size() + Received);
<a name="l00367"></a>00367 <span class="keywordtype">char</span>* Begin = &myPendingPacket[0] + myPendingPacket.size() - Received;
<a name="l00368"></a>00368 memcpy(Begin, Buffer, Received);
<a name="l00369"></a>00369 }
<a name="l00370"></a>00370 }
<a name="l00371"></a>00371
<a name="l00372"></a>00372 <span class="comment">// We have received all the datas : we can copy it to the user packet, and clear our internal packet</span>
<a name="l00373"></a>00373 PacketToReceive.<a class="code" href="classsf_1_1Packet.htm#3a7a30fb7a39e59df0cbd773756f60da" title="Clear the packet data.">Clear</a>();
<a name="l00374"></a>00374 <span class="keywordflow">if</span> (!myPendingPacket.empty())
<a name="l00375"></a>00375 PacketToReceive.<a class="code" href="classsf_1_1Packet.htm#9a480468cc7745863b7c93e0ae449cbd" title="Called after the packet has been received from the network.">OnReceive</a>(&myPendingPacket[0], myPendingPacket.size());
<a name="l00376"></a>00376 myPendingPacket.clear();
<a name="l00377"></a>00377 myPendingPacketSize = -1;
<a name="l00378"></a>00378
<a name="l00379"></a>00379 <span class="keywordflow">return</span> Socket::Done;
<a name="l00380"></a>00380 }
<a name="l00381"></a>00381
<a name="l00382"></a>00382
<a name="l00386"></a><a class="code" href="classsf_1_1SocketTCP.htm#70a5111cbddd1edbfa6cbd6017c6d044">00386</a> <span class="keywordtype">bool</span> <a class="code" href="classsf_1_1SocketTCP.htm#70a5111cbddd1edbfa6cbd6017c6d044" title="Close the socket.">SocketTCP::Close</a>()
<a name="l00387"></a>00387 {
<a name="l00388"></a>00388 <span class="keywordflow">if</span> (<a class="code" href="classsf_1_1SocketTCP.htm#098d613057a72d9e5cfa76a77b5f7124" title="Check if the socket is in a valid state ; this function can be called any time to...">IsValid</a>())
<a name="l00389"></a>00389 {
<a name="l00390"></a>00390 <span class="keywordflow">if</span> (!<a class="code" href="classsf_1_1SocketHelper.htm#ec266cafe3270d1f2e210909b9b6d232" title="Close / destroy a socket.">SocketHelper::Close</a>(mySocket))
<a name="l00391"></a>00391 {
<a name="l00392"></a>00392 std::cerr << <span class="stringliteral">"Failed to close socket"</span> << std::endl;
<a name="l00393"></a>00393 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00394"></a>00394 }
<a name="l00395"></a>00395
<a name="l00396"></a>00396 mySocket = <a class="code" href="classsf_1_1SocketHelper.htm#99e426a217cc8847264f837632b4e458" title="Return the value of the invalid socket.">SocketHelper::InvalidSocket</a>();
<a name="l00397"></a>00397 }
<a name="l00398"></a>00398
<a name="l00399"></a>00399 myIsBlocking = <span class="keyword">true</span>;
<a name="l00400"></a>00400
<a name="l00401"></a>00401 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00402"></a>00402 }
<a name="l00403"></a>00403
<a name="l00404"></a>00404
<a name="l00409"></a><a class="code" href="classsf_1_1SocketTCP.htm#098d613057a72d9e5cfa76a77b5f7124">00409</a> <span class="keywordtype">bool</span> <a class="code" href="classsf_1_1SocketTCP.htm#098d613057a72d9e5cfa76a77b5f7124" title="Check if the socket is in a valid state ; this function can be called any time to...">SocketTCP::IsValid</a>()<span class="keyword"> const</span>
<a name="l00410"></a>00410 <span class="keyword"></span>{
<a name="l00411"></a>00411 <span class="keywordflow">return</span> mySocket != <a class="code" href="classsf_1_1SocketHelper.htm#99e426a217cc8847264f837632b4e458" title="Return the value of the invalid socket.">SocketHelper::InvalidSocket</a>();
<a name="l00412"></a>00412 }
<a name="l00413"></a>00413
<a name="l00414"></a>00414
<a name="l00418"></a><a class="code" href="classsf_1_1SocketTCP.htm#ae32dcf5042a50544848140ec1f94ed1">00418</a> <span class="keywordtype">bool</span> <a class="code" href="classsf_1_1SocketTCP.htm#ae32dcf5042a50544848140ec1f94ed1" title="Comparison operator ==.">SocketTCP::operator ==</a>(<span class="keyword">const</span> <a class="code" href="classsf_1_1SocketTCP.htm" title="SocketTCP wraps a socket using TCP protocol to send data safely (but a bit slower)...">SocketTCP</a>& Other)<span class="keyword"> const</span>
<a name="l00419"></a>00419 <span class="keyword"></span>{
<a name="l00420"></a>00420 <span class="keywordflow">return</span> mySocket == Other.<a class="code" href="classsf_1_1SocketTCP.htm#4caa2174292afe7d64daece591126979" title="Socket descriptor.">mySocket</a>;
<a name="l00421"></a>00421 }
<a name="l00422"></a>00422
<a name="l00423"></a>00423
<a name="l00427"></a><a class="code" href="classsf_1_1SocketTCP.htm#4d4dd9e422c485b8a8b390d1f210e84e">00427</a> <span class="keywordtype">bool</span> <a class="code" href="classsf_1_1SocketTCP.htm#4d4dd9e422c485b8a8b390d1f210e84e" title="Comparison operator !=.">SocketTCP::operator !=</a>(<span class="keyword">const</span> <a class="code" href="classsf_1_1SocketTCP.htm" title="SocketTCP wraps a socket using TCP protocol to send data safely (but a bit slower)...">SocketTCP</a>& Other)<span class="keyword"> const</span>
<a name="l00428"></a>00428 <span class="keyword"></span>{
<a name="l00429"></a>00429 <span class="keywordflow">return</span> mySocket != Other.<a class="code" href="classsf_1_1SocketTCP.htm#4caa2174292afe7d64daece591126979" title="Socket descriptor.">mySocket</a>;
<a name="l00430"></a>00430 }
<a name="l00431"></a>00431
<a name="l00432"></a>00432
<a name="l00438"></a><a class="code" href="classsf_1_1SocketTCP.htm#dbcfa2c662f98a92beb509d3e5ebb1ce">00438</a> <span class="keywordtype">bool</span> <a class="code" href="classsf_1_1SocketTCP.htm#dbcfa2c662f98a92beb509d3e5ebb1ce" title="Comparison operator &lt;.">SocketTCP::operator <</a>(<span class="keyword">const</span> <a class="code" href="classsf_1_1SocketTCP.htm" title="SocketTCP wraps a socket using TCP protocol to send data safely (but a bit slower)...">SocketTCP</a>& Other)<span class="keyword"> const</span>
<a name="l00439"></a>00439 <span class="keyword"></span>{
<a name="l00440"></a>00440 <span class="keywordflow">return</span> mySocket < Other.<a class="code" href="classsf_1_1SocketTCP.htm#4caa2174292afe7d64daece591126979" title="Socket descriptor.">mySocket</a>;
<a name="l00441"></a>00441 }
<a name="l00442"></a>00442
<a name="l00443"></a>00443
<a name="l00448"></a>00448 <a class="code" href="classsf_1_1SocketTCP.htm#098157a901a6f355b499085a3fb97afa" title="Default constructor.">SocketTCP::SocketTCP</a>(SocketHelper::SocketType Descriptor)
<a name="l00449"></a>00449 {
<a name="l00450"></a>00450 Create(Descriptor);
<a name="l00451"></a>00451 }
<a name="l00452"></a>00452
<a name="l00453"></a>00453
<a name="l00457"></a>00457 <span class="keywordtype">void</span> SocketTCP::Create(SocketHelper::SocketType Descriptor)
<a name="l00458"></a>00458 {
<a name="l00459"></a>00459 <span class="comment">// Use the given socket descriptor, or get a new one</span>
<a name="l00460"></a>00460 mySocket = Descriptor ? Descriptor : socket(PF_INET, SOCK_STREAM, 0);
<a name="l00461"></a>00461 myIsBlocking = <span class="keyword">true</span>;
<a name="l00462"></a>00462
<a name="l00463"></a>00463 <span class="comment">// Reset the pending packet</span>
<a name="l00464"></a>00464 myPendingPacket.clear();
<a name="l00465"></a>00465 myPendingPacketSize = -1;
<a name="l00466"></a>00466
<a name="l00467"></a>00467 <span class="comment">// Setup default options</span>
<a name="l00468"></a>00468 <span class="keywordflow">if</span> (<a class="code" href="classsf_1_1SocketTCP.htm#098d613057a72d9e5cfa76a77b5f7124" title="Check if the socket is in a valid state ; this function can be called any time to...">IsValid</a>())
<a name="l00469"></a>00469 {
<a name="l00470"></a>00470 <span class="comment">// To avoid the "Address already in use" error message when trying to bind to the same port</span>
<a name="l00471"></a>00471 <span class="keywordtype">int</span> Yes = 1;
<a name="l00472"></a>00472 <span class="keywordflow">if</span> (setsockopt(mySocket, SOL_SOCKET, SO_REUSEADDR, reinterpret_cast<char*>(&Yes), <span class="keyword">sizeof</span>(Yes)) == -1)
<a name="l00473"></a>00473 {
<a name="l00474"></a>00474 std::cerr << <span class="stringliteral">"Failed to set socket option \"SO_REUSEADDR\" ; "</span>
<a name="l00475"></a>00475 << <span class="stringliteral">"binding to a same port may fail if too fast"</span> << std::endl;
<a name="l00476"></a>00476 }
<a name="l00477"></a>00477
<a name="l00478"></a>00478 <span class="comment">// Disable the Nagle algorithm (ie. removes buffering of TCP packets)</span>
<a name="l00479"></a>00479 <span class="keywordflow">if</span> (setsockopt(mySocket, IPPROTO_TCP, TCP_NODELAY, reinterpret_cast<char*>(&Yes), <span class="keyword">sizeof</span>(Yes)) == -1)
<a name="l00480"></a>00480 {
<a name="l00481"></a>00481 std::cerr << <span class="stringliteral">"Failed to set socket option \"TCP_NODELAY\" ; "</span>
<a name="l00482"></a>00482 << <span class="stringliteral">"all your TCP packets will be buffered"</span> << std::endl;
<a name="l00483"></a>00483 }
<a name="l00484"></a>00484
<a name="l00485"></a>00485 <span class="comment">// Set blocking by default (should always be the case anyway)</span>
<a name="l00486"></a>00486 <a class="code" href="classsf_1_1SocketTCP.htm#a80f7711b15fe33a5c7005acedae43c9" title="Change the blocking state of the socket.">SetBlocking</a>(<span class="keyword">true</span>);
<a name="l00487"></a>00487 }
<a name="l00488"></a>00488 }
<a name="l00489"></a>00489
<a name="l00490"></a>00490 } <span class="comment">// namespace sf</span>
</pre></div></div>
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