ACKme / WiConnect

Host library for controlling a WiConnect enabled Wi-Fi module.

Dependents:   wiconnect-ota_example wiconnect-web_setup_example wiconnect-test-console wiconnect-tcp_server_example ... more

doc/mbed/html/tcp_server_2example_8cpp-example.html@39:a963f69cb2de, 2015-02-23 (annotated)

Committer:
dan_ackme
Date:
Mon Feb 23 20:30:18 2015 -0800
Revision:
39:a963f69cb2de
Parent:
34:2616445d0823 
added httpAcceptWebsocket API

Who changed what in which revision?

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dan_ackme 34:2616445d0823 35 WiConnect Host Library- API Reference Guide</td>
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dan_ackme 34:2616445d0823 100 <div class="header">
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dan_ackme 34:2616445d0823 102 <div class="title">tcp_server/example.cpp</div> </div>
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dan_ackme 34:2616445d0823 104 <div class="contents">
dan_ackme 34:2616445d0823 105 <p>This is an example of using the TCP server API to send/receive data from a remote TCP client.</p>
dan_ackme 34:2616445d0823 106 <p>This example is intended to be used with '<a class="el" href="tcp__client_8py_source.html">tcp_client.py</a>' python script in the same directory as this example.cpp file.</p>
dan_ackme 34:2616445d0823 107 <p>It works as follows:</p><ol type="1">
dan_ackme 34:2616445d0823 108 <li>Instantiate the WiConnect Library</li>
dan_ackme 34:2616445d0823 109 <li>Initiate Communication with WiFi Module</li>
dan_ackme 34:2616445d0823 110 <li>Join the network</li>
dan_ackme 34:2616445d0823 111 <li>Start the TCP server</li>
dan_ackme 34:2616445d0823 112 <li>Wait for clients to connect</li>
dan_ackme 34:2616445d0823 113 <li>Receive data from client</li>
dan_ackme 34:2616445d0823 114 <li>Send data to client</li>
dan_ackme 34:2616445d0823 115 <li>Close client connection</li>
dan_ackme 34:2616445d0823 116 <li>Goto sleep 5</li>
dan_ackme 34:2616445d0823 117 </ol>
dan_ackme 34:2616445d0823 118 <div class="fragment"><div class="line"></div>
dan_ackme 34:2616445d0823 119 <div class="line"><span class="comment">/******************************************************************************</span></div>
dan_ackme 34:2616445d0823 120 <div class="line"><span class="comment"> * Example Variables</span></div>
dan_ackme 34:2616445d0823 121 <div class="line"><span class="comment"> */</span></div>
dan_ackme 34:2616445d0823 122 <div class="line"></div>
dan_ackme 34:2616445d0823 123 <div class="line"><span class="comment">// The port the server listens on</span></div>
dan_ackme 34:2616445d0823 124 <div class="line"><span class="preprocessor">#define TCP_SERVER_PORT 7</span></div>
dan_ackme 34:2616445d0823 125 <div class="line"><span class="comment">// The maximum simultaneous client connections</span></div>
dan_ackme 34:2616445d0823 126 <div class="line"><span class="comment">// (note this example only supports 1)</span></div>
dan_ackme 34:2616445d0823 127 <div class="line"><span class="preprocessor">#define TCP_SERVER_MAX_CLIENTS 1</span></div>
dan_ackme 34:2616445d0823 128 <div class="line"></div>
dan_ackme 34:2616445d0823 129 <div class="line"><span class="comment">// This is the name of your WiFi network</span></div>
dan_ackme 34:2616445d0823 130 <div class="line"><span class="comment">// Look for this name in your WiFi settings</span></div>
dan_ackme 34:2616445d0823 131 <div class="line"><span class="comment">// (e.g. your phone&#39;s list of WiFi networks in the WiFi settings menu)</span></div>
dan_ackme 34:2616445d0823 132 <div class="line"><span class="comment">// tip: add double-quotes around SSID to add spaces to name</span></div>
dan_ackme 34:2616445d0823 133 <div class="line"><span class="preprocessor">#define NETWORK_SSID &quot;\&quot;&lt;YOUR NETWORK NAME HERE&gt;\&quot;&quot;</span></div>
dan_ackme 34:2616445d0823 134 <div class="line"></div>
dan_ackme 34:2616445d0823 135 <div class="line"><span class="comment">// This is the password of your WiFi network</span></div>
dan_ackme 34:2616445d0823 136 <div class="line"><span class="comment">// Leave as empty string (e.g &quot;&quot;) to connect to OPEN network</span></div>
dan_ackme 34:2616445d0823 137 <div class="line"><span class="preprocessor">#define NETWORK_PASSWORD &quot;\&quot;&lt;YOUR NETWORK PASSWORD HERE&gt;\&quot;&quot;</span></div>
dan_ackme 34:2616445d0823 138 <div class="line"></div>
dan_ackme 34:2616445d0823 139 <div class="line"></div>
dan_ackme 34:2616445d0823 140 <div class="line"><span class="comment">/******************************************************************************</span></div>
dan_ackme 34:2616445d0823 141 <div class="line"><span class="comment"> * Includes</span></div>
dan_ackme 34:2616445d0823 142 <div class="line"><span class="comment"> */</span></div>
dan_ackme 34:2616445d0823 143 <div class="line"></div>
dan_ackme 34:2616445d0823 144 <div class="line"><span class="comment">// include C library headers</span></div>
dan_ackme 34:2616445d0823 145 <div class="line"><span class="preprocessor">#include &lt;stdio.h&gt;</span> <span class="comment">// needed for printf</span></div>
dan_ackme 34:2616445d0823 146 <div class="line"></div>
dan_ackme 34:2616445d0823 147 <div class="line"><span class="comment">// include target specific defines</span></div>
dan_ackme 34:2616445d0823 148 <div class="line"><span class="preprocessor">#include &quot;target_config.h&quot;</span></div>
dan_ackme 34:2616445d0823 149 <div class="line"><span class="comment">// include the Wiconnect Host Library API header</span></div>
dan_ackme 34:2616445d0823 150 <div class="line"><span class="preprocessor">#include &quot;Wiconnect.h&quot;</span></div>
dan_ackme 34:2616445d0823 151 <div class="line"></div>
dan_ackme 34:2616445d0823 152 <div class="line"></div>
dan_ackme 34:2616445d0823 153 <div class="line"></div>
dan_ackme 34:2616445d0823 154 <div class="line"><span class="comment">/******************************************************************************</span></div>
dan_ackme 34:2616445d0823 155 <div class="line"><span class="comment"> * Local Functions</span></div>
dan_ackme 34:2616445d0823 156 <div class="line"><span class="comment"> */</span></div>
dan_ackme 34:2616445d0823 157 <div class="line"></div>
dan_ackme 34:2616445d0823 158 <div class="line"></div>
dan_ackme 34:2616445d0823 159 <div class="line"><span class="comment">/******************************************************************************</span></div>
dan_ackme 34:2616445d0823 160 <div class="line"><span class="comment"> * Global Defines</span></div>
dan_ackme 34:2616445d0823 161 <div class="line"><span class="comment"> */</span></div>
dan_ackme 34:2616445d0823 162 <div class="line"></div>
dan_ackme 34:2616445d0823 163 <div class="line"><span class="comment">// Transmit/receive buffers for the remote client socket</span></div>
dan_ackme 34:2616445d0823 164 <div class="line"><span class="keyword">static</span> uint8_t clientRxBuffer[256], clientTxBuffer[256];</div>
dan_ackme 34:2616445d0823 165 <div class="line"></div>
dan_ackme 34:2616445d0823 166 <div class="line"><span class="comment">// Serial used for printfs to terminal (i.e. NOT used for WiConnect)</span></div>
dan_ackme 34:2616445d0823 167 <div class="line"><span class="keyword">static</span> Serial consoleSerial(STDIO_UART_TX, STDIO_UART_RX);</div>
dan_ackme 34:2616445d0823 168 <div class="line"></div>
dan_ackme 34:2616445d0823 169 <div class="line"></div>
dan_ackme 34:2616445d0823 170 <div class="line"></div>
dan_ackme 34:2616445d0823 171 <div class="line"><span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 172 <div class="line"><span class="comment">// STEP 1: Instantiate WiConnect Library</span></div>
dan_ackme 34:2616445d0823 173 <div class="line"><span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 174 <div class="line"></div>
dan_ackme 34:2616445d0823 175 <div class="line"></div>
dan_ackme 34:2616445d0823 176 <div class="line"><span class="comment">// Setup wiconnect serial interface configuration</span></div>
dan_ackme 34:2616445d0823 177 <div class="line"><span class="comment">// Here we only specify the rx buffer size and not rx buffer pointer, this means</span></div>
dan_ackme 34:2616445d0823 178 <div class="line"><span class="comment">// The serial RX buffer will be dynamically allocated</span></div>
dan_ackme 34:2616445d0823 179 <div class="line">SerialConfig serialConfig(WICONNECT_RX_PIN, WICONNECT_TX_PIN, 256, NULL);</div>
dan_ackme 34:2616445d0823 180 <div class="line"></div>
dan_ackme 34:2616445d0823 181 <div class="line"><span class="comment">// Instantiate the Wiconnect library</span></div>
dan_ackme 34:2616445d0823 182 <div class="line"><span class="comment">// Here we specify the buffer size ONLY which means we&#39;re using dynmaic allocation</span></div>
dan_ackme 34:2616445d0823 183 <div class="line">Wiconnect wiconnectIfc(serialConfig, 256, NULL, WICONNECT_RESET_PIN);</div>
dan_ackme 34:2616445d0823 184 <div class="line"></div>
dan_ackme 34:2616445d0823 185 <div class="line"></div>
dan_ackme 34:2616445d0823 186 <div class="line"></div>
dan_ackme 34:2616445d0823 187 <div class="line"></div>
dan_ackme 34:2616445d0823 188 <div class="line"></div>
dan_ackme 34:2616445d0823 189 <div class="line"><span class="comment">/******************************************************************************</span></div>
dan_ackme 34:2616445d0823 190 <div class="line"><span class="comment"> * Starting point of application</span></div>
dan_ackme 34:2616445d0823 191 <div class="line"><span class="comment"> */</span></div>
dan_ackme 34:2616445d0823 192 <div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv)</div>
dan_ackme 34:2616445d0823 193 <div class="line">{</div>
dan_ackme 34:2616445d0823 194 <div class="line"> <a name="a0"></a><a class="code" href="group__api__core__types.html#ga325637ed501728bd6c8c7a7982b9ce05">WiconnectResult</a> result;</div>
dan_ackme 34:2616445d0823 195 <div class="line"> <span class="comment">// Instantiate a client socket object with statically allocaed transmit/receive buffers</span></div>
dan_ackme 34:2616445d0823 196 <div class="line"> <span class="comment">// Note: this socket object isn&#39;t valid until tcpAccept() is called with in</span></div>
dan_ackme 34:2616445d0823 197 <div class="line"> WiconnectSocket clientSocket(<span class="keyword">sizeof</span>(clientRxBuffer), clientRxBuffer, <span class="keyword">sizeof</span>(clientTxBuffer), clientTxBuffer);</div>
dan_ackme 34:2616445d0823 198 <div class="line"></div>
dan_ackme 34:2616445d0823 199 <div class="line"> consoleSerial.baud(115200); <span class="comment">// console terminal to 115200 baud</span></div>
dan_ackme 34:2616445d0823 200 <div class="line"></div>
dan_ackme 34:2616445d0823 201 <div class="line"></div>
dan_ackme 34:2616445d0823 202 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 203 <div class="line"> <span class="comment">// STEP 2: Initiate Communication with WiFi Module</span></div>
dan_ackme 34:2616445d0823 204 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 205 <div class="line"></div>
dan_ackme 34:2616445d0823 206 <div class="line"> printf(<span class="stringliteral">&quot;Initializing WiConnect Library...\r\n&quot;</span>);</div>
dan_ackme 34:2616445d0823 207 <div class="line"></div>
dan_ackme 34:2616445d0823 208 <div class="line"> <span class="comment">// Initialize communication with WiFi module</span></div>
dan_ackme 34:2616445d0823 209 <div class="line"> <span class="keywordflow">if</span>(<a name="a1"></a><a class="code" href="group__api__core__macro.html#gab27aa3ef76302b5221766abfd4f47e64">WICONNECT_FAILED</a>(result, wiconnectIfc.init(<span class="keyword">true</span>)))</div>
dan_ackme 34:2616445d0823 210 <div class="line"> {</div>
dan_ackme 34:2616445d0823 211 <div class="line"> printf(<span class="stringliteral">&quot;Failed to initialize communication with WiFi module: %s\r\n&quot;</span></div>
dan_ackme 34:2616445d0823 212 <div class="line"> <span class="stringliteral">&quot;Make sure the wires are connected correctly\r\n&quot;</span>, Wiconnect::getWiconnectResultStr(result));</div>
dan_ackme 34:2616445d0823 213 <div class="line"> <span class="keywordflow">if</span>(result == <a name="a2"></a><a class="code" href="group__api__core__types.html#gga325637ed501728bd6c8c7a7982b9ce05a62defbdafd472461054dd6bb888c9a1e">WICONNECT_FIRMWARE_OUTDATED</a>)</div>
dan_ackme 34:2616445d0823 214 <div class="line"> {</div>
dan_ackme 39:a963f69cb2de 215 <div class="line"> printf(<span class="stringliteral">&quot;** The WiFi firmware is not supported. Run the ota example to update the firmware:\r\n&quot;</span>);</div>
dan_ackme 39:a963f69cb2de 216 <div class="line"> printf(<span class="stringliteral">&quot;https://developer.mbed.org/teams/ACKme/code/wiconnect-ota_example\r\n\r\n&quot;</span>);</div>
dan_ackme 34:2616445d0823 217 <div class="line"> }</div>
dan_ackme 34:2616445d0823 218 <div class="line"> <span class="keywordflow">for</span>(;;); <span class="comment">// infinite loop</span></div>
dan_ackme 34:2616445d0823 219 <div class="line"> }</div>
dan_ackme 34:2616445d0823 220 <div class="line"></div>
dan_ackme 34:2616445d0823 221 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 222 <div class="line"> <span class="comment">// STEP 3: Join the network</span></div>
dan_ackme 34:2616445d0823 223 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 224 <div class="line"></div>
dan_ackme 34:2616445d0823 225 <div class="line"> printf(<span class="stringliteral">&quot;Joining WiFi network: %s\r\n&quot;</span>, NETWORK_SSID);</div>
dan_ackme 34:2616445d0823 226 <div class="line"></div>
dan_ackme 34:2616445d0823 227 <div class="line"> <span class="comment">// Initialize communication with WiFi module</span></div>
dan_ackme 34:2616445d0823 228 <div class="line"> <span class="keywordflow">if</span>(<a class="code" href="group__api__core__macro.html#gab27aa3ef76302b5221766abfd4f47e64">WICONNECT_FAILED</a>(result, wiconnectIfc.join(NETWORK_SSID, NETWORK_PASSWORD)))</div>
dan_ackme 34:2616445d0823 229 <div class="line"> {</div>
dan_ackme 34:2616445d0823 230 <div class="line"> printf(<span class="stringliteral">&quot;Failed to join network: %s\r\n&quot;</span>, Wiconnect::getWiconnectResultStr(result));</div>
dan_ackme 34:2616445d0823 231 <div class="line"> <span class="keywordflow">for</span>(;;); <span class="comment">// infinite loop</span></div>
dan_ackme 34:2616445d0823 232 <div class="line"> }</div>
dan_ackme 34:2616445d0823 233 <div class="line"></div>
dan_ackme 34:2616445d0823 234 <div class="line"></div>
dan_ackme 34:2616445d0823 235 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 236 <div class="line"> <span class="comment">// STEP 4: Start the TCP server</span></div>
dan_ackme 34:2616445d0823 237 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 238 <div class="line"></div>
dan_ackme 34:2616445d0823 239 <div class="line"> printf(<span class="stringliteral">&quot;Starting TCP server, listening on: %s:%d\r\n&quot;</span>, wiconnectIfc.getIpAddress(), TCP_SERVER_PORT);</div>
dan_ackme 34:2616445d0823 240 <div class="line"></div>
dan_ackme 34:2616445d0823 241 <div class="line"> <span class="keywordflow">if</span>(<a class="code" href="group__api__core__macro.html#gab27aa3ef76302b5221766abfd4f47e64">WICONNECT_FAILED</a>(result, wiconnectIfc.tcpListen(TCP_SERVER_PORT, TCP_SERVER_MAX_CLIENTS)))</div>
dan_ackme 34:2616445d0823 242 <div class="line"> {</div>
dan_ackme 34:2616445d0823 243 <div class="line"> printf(<span class="stringliteral">&quot;Failed to start TCP server: %s\r\n&quot;</span>, Wiconnect::getWiconnectResultStr(result));</div>
dan_ackme 34:2616445d0823 244 <div class="line"> <span class="keywordflow">for</span>(;;); <span class="comment">// infinite loop</span></div>
dan_ackme 34:2616445d0823 245 <div class="line"> }</div>
dan_ackme 34:2616445d0823 246 <div class="line"></div>
dan_ackme 34:2616445d0823 247 <div class="line"></div>
dan_ackme 34:2616445d0823 248 <div class="line"> <span class="keywordflow">for</span>(;;)</div>
dan_ackme 34:2616445d0823 249 <div class="line"> {</div>
dan_ackme 34:2616445d0823 250 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 251 <div class="line"> <span class="comment">// STEP 5: Wait for clients to connect</span></div>
dan_ackme 34:2616445d0823 252 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 253 <div class="line"></div>
dan_ackme 34:2616445d0823 254 <div class="line"> printf(<span class="stringliteral">&quot;Waiting for a client to connect...\r\n&quot;</span>);</div>
dan_ackme 34:2616445d0823 255 <div class="line"></div>
dan_ackme 34:2616445d0823 256 <div class="line"> <span class="keywordflow">if</span>(<a class="code" href="group__api__core__macro.html#gab27aa3ef76302b5221766abfd4f47e64">WICONNECT_FAILED</a>(result, wiconnectIfc.tcpAccept(clientSocket)))</div>
dan_ackme 34:2616445d0823 257 <div class="line"> {</div>
dan_ackme 34:2616445d0823 258 <div class="line"> printf(<span class="stringliteral">&quot;Failed to accept client: %s\r\n&quot;</span>, Wiconnect::getWiconnectResultStr(result));</div>
dan_ackme 34:2616445d0823 259 <div class="line"> <span class="keywordflow">continue</span>;</div>
dan_ackme 34:2616445d0823 260 <div class="line"> }</div>
dan_ackme 34:2616445d0823 261 <div class="line"> printf(<span class="stringliteral">&quot;Client connected: %s:%d\r\n&quot;</span>, clientSocket.getHost(), clientSocket.getRemotePort());</div>
dan_ackme 34:2616445d0823 262 <div class="line"></div>
dan_ackme 34:2616445d0823 263 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 264 <div class="line"> <span class="comment">// STEP 6: Receive data from client</span></div>
dan_ackme 34:2616445d0823 265 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 266 <div class="line"></div>
dan_ackme 34:2616445d0823 267 <div class="line"> uint8_t *dataPtr; <span class="comment">// pointer to client socket&#39;s internal RX buffer</span></div>
dan_ackme 34:2616445d0823 268 <div class="line"> uint16_t readSize; <span class="comment">// will contain number of bytes available in RX buffer</span></div>
dan_ackme 34:2616445d0823 269 <div class="line"> <span class="keywordflow">if</span>(<a class="code" href="group__api__core__macro.html#gab27aa3ef76302b5221766abfd4f47e64">WICONNECT_FAILED</a>(result, clientSocket.read(&amp;dataPtr, &amp;readSize)))</div>
dan_ackme 34:2616445d0823 270 <div class="line"> {</div>
dan_ackme 34:2616445d0823 271 <div class="line"> printf(<span class="stringliteral">&quot;Failed to read data from client: %s\r\n&quot;</span>, Wiconnect::getWiconnectResultStr(result));</div>
dan_ackme 34:2616445d0823 272 <div class="line"> clientSocket.close();</div>
dan_ackme 34:2616445d0823 273 <div class="line"> <span class="keywordflow">continue</span>;</div>
dan_ackme 34:2616445d0823 274 <div class="line"> }</div>
dan_ackme 34:2616445d0823 275 <div class="line"></div>
dan_ackme 34:2616445d0823 276 <div class="line"> printf(<span class="stringliteral">&quot;From client: %s\r\n&quot;</span>, dataPtr);</div>
dan_ackme 34:2616445d0823 277 <div class="line"></div>
dan_ackme 34:2616445d0823 278 <div class="line"></div>
dan_ackme 34:2616445d0823 279 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 280 <div class="line"> <span class="comment">// STEP 7: Send data to client</span></div>
dan_ackme 34:2616445d0823 281 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 282 <div class="line"></div>
dan_ackme 34:2616445d0823 283 <div class="line"> <span class="keywordflow">if</span>(<a class="code" href="group__api__core__macro.html#gab27aa3ef76302b5221766abfd4f47e64">WICONNECT_FAILED</a>(result, clientSocket.puts(<span class="stringliteral">&quot;Hello client!!\r\n&quot;</span>)))</div>
dan_ackme 34:2616445d0823 284 <div class="line"> {</div>
dan_ackme 34:2616445d0823 285 <div class="line"> printf(<span class="stringliteral">&quot;Failed to send data to client: %s\r\n&quot;</span>, Wiconnect::getWiconnectResultStr(result));</div>
dan_ackme 34:2616445d0823 286 <div class="line"> clientSocket.close();</div>
dan_ackme 34:2616445d0823 287 <div class="line"> <span class="keywordflow">continue</span>;</div>
dan_ackme 34:2616445d0823 288 <div class="line"> }</div>
dan_ackme 34:2616445d0823 289 <div class="line"></div>
dan_ackme 34:2616445d0823 290 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 291 <div class="line"> <span class="comment">// STEP 8: Close client connection</span></div>
dan_ackme 34:2616445d0823 292 <div class="line"> <span class="comment">//-------------------------------------------------------------------------</span></div>
dan_ackme 34:2616445d0823 293 <div class="line"></div>
dan_ackme 34:2616445d0823 294 <div class="line"> clientSocket.close();</div>
dan_ackme 34:2616445d0823 295 <div class="line"> }</div>
dan_ackme 34:2616445d0823 296 <div class="line"></div>
dan_ackme 34:2616445d0823 297 <div class="line">}</div>
dan_ackme 34:2616445d0823 298 <div class="line"></div>
dan_ackme 34:2616445d0823 299 </div><!-- fragment --> </div><!-- contents -->
dan_ackme 34:2616445d0823 300 </div><!-- doc-content -->
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dan_ackme 34:2616445d0823 302 <ul>
dan_ackme 34:2616445d0823 303 <li class="footer">&copy; ACKme Networks 2014</li>
dan_ackme 34:2616445d0823 304 </ul>
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