libctru/network_2sockets_2source_2sockets_8c-example.html
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<div id="projectname">libctru
&#160;<span id="projectnumber">v2.4.1</span>
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<div class="title">network/sockets/source/sockets.c</div> </div>
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<div class="contents">
<div class="fragment"><div class="line"><span class="preprocessor">#include &lt;stdio.h&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;stdlib.h&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;string.h&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;malloc.h&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;errno.h&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;stdarg.h&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;unistd.h&gt;</span></div>
<div class="line"> </div>
<div class="line"><span class="preprocessor">#include &lt;fcntl.h&gt;</span></div>
<div class="line"> </div>
<div class="line"><span class="preprocessor">#include &lt;sys/types.h&gt;</span></div>
<div class="line"> </div>
<div class="line"><span class="preprocessor">#include &lt;sys/socket.h&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;netinet/in.h&gt;</span></div>
<div class="line"><span class="preprocessor">#include &lt;arpa/inet.h&gt;</span></div>
<div class="line"> </div>
<div class="line"><span class="preprocessor">#include &lt;<a class="code" href="3ds_8h.html">3ds.h</a>&gt;</span></div>
<div class="line"> </div>
<div class="line"><span class="preprocessor">#define SOC_ALIGN 0x1000</span></div>
<div class="line"><span class="preprocessor">#define SOC_BUFFERSIZE 0x100000</span></div>
<div class="line"> </div>
<div class="line"><span class="keyword">static</span> <a class="code" href="types_8h.html#afaa62991928fb9fb18ff0db62a040aba">u32</a> *SOC_buffer = NULL;</div>
<div class="line"><a class="code" href="types_8h.html#ae9b1af5c037e57a98884758875d3a7c4">s32</a> sock = -1, csock = -1;</div>
<div class="line"> </div>
<div class="line"><a name="a0"></a><a class="code" href="rbtree_8h.html#a797a3e1c8507a7c7b4e051d3f1349154">__attribute__</a>((format(printf,1,2)))</div>
<div class="line">void failExit(const <span class="keywordtype">char</span> *fmt, ...);</div>
<div class="line"> </div>
<div class="line">const static <span class="keywordtype">char</span> http_200[] = &quot;HTTP/1.1 200 OK\r\n&quot;;</div>
<div class="line"> </div>
<div class="line">const static <span class="keywordtype">char</span> indexdata[] = &quot;&lt;html&gt; \</div>
<div class="line"> &lt;head&gt;&lt;title&gt;A test page&lt;/title&gt;&lt;/head&gt; \</div>
<div class="line"> &lt;body&gt; \</div>
<div class="line"> This small test page has had %d hits. \</div>
<div class="line"> &lt;/body&gt; \</div>
<div class="line"> &lt;/html&gt;&quot;;</div>
<div class="line"> </div>
<div class="line">const static <span class="keywordtype">char</span> http_html_hdr[] = &quot;Content-type: text/html\r\n\r\n&quot;;</div>
<div class="line">const static <span class="keywordtype">char</span> http_get_index[] = &quot;GET / HTTP/1.1\r\n&quot;;</div>
<div class="line"> </div>
<div class="line"> </div>
<div class="line"><span class="comment">//---------------------------------------------------------------------------------</span></div>
<div class="line"><span class="keywordtype">void</span> socShutdown() {</div>
<div class="line"><span class="comment">//---------------------------------------------------------------------------------</span></div>
<div class="line"> printf(<span class="stringliteral">&quot;waiting for socExit...\n&quot;</span>);</div>
<div class="line"> <a name="a1"></a><a class="code" href="soc_8h.html#a4c165678b18a16dccc315220ec61e1ee">socExit</a>();</div>
<div class="line"> </div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="comment">//---------------------------------------------------------------------------------</span></div>
<div class="line"><span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv) {</div>
<div class="line"><span class="comment">//---------------------------------------------------------------------------------</span></div>
<div class="line"> <span class="keywordtype">int</span> ret;</div>
<div class="line"> </div>
<div class="line"> <a class="code" href="types_8h.html#afaa62991928fb9fb18ff0db62a040aba">u32</a> clientlen;</div>
<div class="line"> <span class="keyword">struct </span><a name="_a2"></a><a class="code" href="structsockaddr__in.html">sockaddr_in</a> client;</div>
<div class="line"> <span class="keyword">struct </span><a class="code" href="structsockaddr__in.html">sockaddr_in</a> server;</div>
<div class="line"> <span class="keywordtype">char</span> temp[1026];</div>
<div class="line"> <span class="keyword">static</span> <span class="keywordtype">int</span> hits=0;</div>
<div class="line"> </div>
<div class="line"> <a name="a3"></a><a class="code" href="gfx_8h.html#a236a005ae029247c8bfe4a4a649206fc">gfxInitDefault</a>();</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// register gfxExit to be run when app quits</span></div>
<div class="line"> <span class="comment">// this can help simplify error handling</span></div>
<div class="line"> atexit(<a name="a4"></a><a class="code" href="gfx_8h.html#aa446ccfdfdd4c575e648956ae96f2a3b">gfxExit</a>);</div>
<div class="line"> </div>
<div class="line"> <a name="a5"></a><a class="code" href="console_8h.html#a8e014e84f81ff901ca62d7669a8c8de8">consoleInit</a>(<a name="a6"></a><a class="code" href="gfx_8h.html#a356112d87f5cf6bbba3ea3b6b010e09caf9d44178134d07cf9c5923200e14af09">GFX_TOP</a>, NULL);</div>
<div class="line"> </div>
<div class="line"> printf (<span class="stringliteral">&quot;\nlibctru sockets demo\n&quot;</span>);</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// allocate buffer for SOC service</span></div>
<div class="line"> SOC_buffer = (<a class="code" href="types_8h.html#afaa62991928fb9fb18ff0db62a040aba">u32</a>*)memalign(SOC_ALIGN, SOC_BUFFERSIZE);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span>(SOC_buffer == NULL) {</div>
<div class="line"> failExit(<span class="stringliteral">&quot;memalign: failed to allocate\n&quot;</span>);</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Now intialise soc:u service</span></div>
<div class="line"> <span class="keywordflow">if</span> ((ret = <a name="a7"></a><a class="code" href="soc_8h.html#a0c15255d27f548252f23860e1f7fe39b">socInit</a>(SOC_buffer, SOC_BUFFERSIZE)) != 0) {</div>
<div class="line"> failExit(<span class="stringliteral">&quot;socInit: 0x%08X\n&quot;</span>, (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>)ret);</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// register socShutdown to run at exit</span></div>
<div class="line"> <span class="comment">// atexit functions execute in reverse order so this runs before gfxExit</span></div>
<div class="line"> atexit(socShutdown);</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// libctru provides BSD sockets so most code from here is standard</span></div>
<div class="line"> clientlen = <span class="keyword">sizeof</span>(client);</div>
<div class="line"> </div>
<div class="line"> sock = socket (AF_INET, SOCK_STREAM, IPPROTO_IP);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (sock &lt; 0) {</div>
<div class="line"> failExit(<span class="stringliteral">&quot;socket: %d %s\n&quot;</span>, errno, strerror(errno));</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> memset (&amp;server, 0, <span class="keyword">sizeof</span> (server));</div>
<div class="line"> memset (&amp;client, 0, <span class="keyword">sizeof</span> (client));</div>
<div class="line"> </div>
<div class="line"> server.sin_family = AF_INET;</div>
<div class="line"> server.sin_port = htons (80);</div>
<div class="line"> server.sin_addr.s_addr = <a name="a8"></a><a class="code" href="soc_8h.html#ab7b49a1dc7a37a50ea146982bc01eee1">gethostid</a>();</div>
<div class="line"> </div>
<div class="line"> printf(<span class="stringliteral">&quot;Point your browser to http://%s/\n&quot;</span>,inet_ntoa(server.sin_addr));</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> ( (ret = bind (sock, (<span class="keyword">struct</span> <a name="_a9"></a><a class="code" href="structsockaddr.html">sockaddr</a> *) &amp;server, <span class="keyword">sizeof</span> (server))) ) {</div>
<div class="line"> close(sock);</div>
<div class="line"> failExit(<span class="stringliteral">&quot;bind: %d %s\n&quot;</span>, errno, strerror(errno));</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="comment">// Set socket non blocking so we can still read input to exit</span></div>
<div class="line"> fcntl(sock, F_SETFL, fcntl(sock, F_GETFL, 0) | O_NONBLOCK);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> ( (ret = listen( sock, 5)) ) {</div>
<div class="line"> failExit(<span class="stringliteral">&quot;listen: %d %s\n&quot;</span>, errno, strerror(errno));</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">while</span> (<a name="a10"></a><a class="code" href="apt_8h.html#a84808c36d9a8c389896ecf241c7f89cb">aptMainLoop</a>()) {</div>
<div class="line"> <a name="a11"></a><a class="code" href="gspgpu_8h.html#abf0a992835649b5fe90e95d8a58b8c45">gspWaitForVBlank</a>();</div>
<div class="line"> <a name="a12"></a><a class="code" href="hid_8h.html#abbbf0e1f3a79a75e459e19f85a66bee6">hidScanInput</a>();</div>
<div class="line"> </div>
<div class="line"> csock = accept (sock, (<span class="keyword">struct</span> <a class="code" href="structsockaddr.html">sockaddr</a> *) &amp;client, &amp;clientlen);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> (csock&lt;0) {</div>
<div class="line"> <span class="keywordflow">if</span>(errno != EAGAIN) {</div>
<div class="line"> failExit(<span class="stringliteral">&quot;accept: %d %s\n&quot;</span>, errno, strerror(errno));</div>
<div class="line"> }</div>
<div class="line"> } <span class="keywordflow">else</span> {</div>
<div class="line"> <span class="comment">// set client socket to blocking to simplify sending data back</span></div>
<div class="line"> fcntl(csock, F_SETFL, fcntl(csock, F_GETFL, 0) &amp; ~O_NONBLOCK);</div>
<div class="line"> printf(<span class="stringliteral">&quot;Connecting port %d from %s\n&quot;</span>, client.sin_port, inet_ntoa(client.sin_addr));</div>
<div class="line"> memset (temp, 0, 1026);</div>
<div class="line"> </div>
<div class="line"> ret = recv (csock, temp, 1024, 0);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span> ( !strncmp( temp, http_get_index, strlen(http_get_index) ) ) {</div>
<div class="line"> hits++;</div>
<div class="line"> </div>
<div class="line"> send(csock, http_200, strlen(http_200),0);</div>
<div class="line"> send(csock, http_html_hdr, strlen(http_html_hdr),0);</div>
<div class="line"> sprintf(temp, indexdata, hits);</div>
<div class="line"> send(csock, temp, strlen(temp),0);</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> close (csock);</div>
<div class="line"> csock = -1;</div>
<div class="line"> </div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> <a class="code" href="types_8h.html#afaa62991928fb9fb18ff0db62a040aba">u32</a> kDown = <a name="a13"></a><a class="code" href="hid_8h.html#aa2cababf764bf0b4297dc2e2fffe2a76">hidKeysDown</a>();</div>
<div class="line"> <span class="keywordflow">if</span> (kDown &amp; <a name="a14"></a><a class="code" href="hid_8h.html#a531c35e38ede3ea4e5ba5afb24b29493a616a1f5c4ed36080ca954453084aea3b">KEY_START</a>) <span class="keywordflow">break</span>;</div>
<div class="line"> }</div>
<div class="line"> </div>
<div class="line"> close(sock);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">return</span> 0;</div>
<div class="line">}</div>
<div class="line"> </div>
<div class="line"><span class="comment">//---------------------------------------------------------------------------------</span></div>
<div class="line"><span class="keywordtype">void</span> failExit(<span class="keyword">const</span> <span class="keywordtype">char</span> *fmt, ...) {</div>
<div class="line"><span class="comment">//---------------------------------------------------------------------------------</span></div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">if</span>(sock&gt;0) close(sock);</div>
<div class="line"> <span class="keywordflow">if</span>(csock&gt;0) close(csock);</div>
<div class="line"> </div>
<div class="line"> va_list ap;</div>
<div class="line"> </div>
<div class="line"> printf(CONSOLE_RED);</div>
<div class="line"> va_start(ap, fmt);</div>
<div class="line"> vprintf(fmt, ap);</div>
<div class="line"> va_end(ap);</div>
<div class="line"> printf(CONSOLE_RESET);</div>
<div class="line"> printf(<span class="stringliteral">&quot;\nPress B to exit\n&quot;</span>);</div>
<div class="line"> </div>
<div class="line"> <span class="keywordflow">while</span> (<a class="code" href="apt_8h.html#a84808c36d9a8c389896ecf241c7f89cb">aptMainLoop</a>()) {</div>
<div class="line"> <a class="code" href="gspgpu_8h.html#abf0a992835649b5fe90e95d8a58b8c45">gspWaitForVBlank</a>();</div>
<div class="line"> <a class="code" href="hid_8h.html#abbbf0e1f3a79a75e459e19f85a66bee6">hidScanInput</a>();</div>
<div class="line"> </div>
<div class="line"> <a class="code" href="types_8h.html#afaa62991928fb9fb18ff0db62a040aba">u32</a> kDown = <a class="code" href="hid_8h.html#aa2cababf764bf0b4297dc2e2fffe2a76">hidKeysDown</a>();</div>
<div class="line"> <span class="keywordflow">if</span> (kDown &amp; <a name="a15"></a><a class="code" href="hid_8h.html#a531c35e38ede3ea4e5ba5afb24b29493a10072b5ee7aa1faf316434ecc9e2bb3a">KEY_B</a>) exit(0);</div>
<div class="line"> }</div>
<div class="line">}</div>
<div class="ttc" id="a3ds_8h_html"><div class="ttname"><a href="3ds_8h.html">3ds.h</a></div><div class="ttdoc">Central 3DS header.</div></div>
<div class="ttc" id="aapt_8h_html_a84808c36d9a8c389896ecf241c7f89cb"><div class="ttname"><a href="apt_8h.html#a84808c36d9a8c389896ecf241c7f89cb">aptMainLoop</a></div><div class="ttdeci">bool aptMainLoop(void)</div><div class="ttdoc">Main function which handles sleep mode and HOME/power buttons - call this at the beginning of every f...</div></div>
<div class="ttc" id="aconsole_8h_html_a8e014e84f81ff901ca62d7669a8c8de8"><div class="ttname"><a href="console_8h.html#a8e014e84f81ff901ca62d7669a8c8de8">consoleInit</a></div><div class="ttdeci">PrintConsole * consoleInit(gfxScreen_t screen, PrintConsole *console)</div><div class="ttdoc">Initialise the console.</div></div>
<div class="ttc" id="agfx_8h_html_a236a005ae029247c8bfe4a4a649206fc"><div class="ttname"><a href="gfx_8h.html#a236a005ae029247c8bfe4a4a649206fc">gfxInitDefault</a></div><div class="ttdeci">void gfxInitDefault(void)</div><div class="ttdoc">Initializes the LCD framebuffers with default parameters This is equivalent to calling:</div></div>
<div class="ttc" id="agfx_8h_html_a356112d87f5cf6bbba3ea3b6b010e09caf9d44178134d07cf9c5923200e14af09"><div class="ttname"><a href="gfx_8h.html#a356112d87f5cf6bbba3ea3b6b010e09caf9d44178134d07cf9c5923200e14af09">GFX_TOP</a></div><div class="ttdeci">@ GFX_TOP</div><div class="ttdoc">Top screen.</div><div class="ttdef"><b>Definition:</b> gfx.h:26</div></div>
<div class="ttc" id="agfx_8h_html_aa446ccfdfdd4c575e648956ae96f2a3b"><div class="ttname"><a href="gfx_8h.html#aa446ccfdfdd4c575e648956ae96f2a3b">gfxExit</a></div><div class="ttdeci">void gfxExit(void)</div><div class="ttdoc">Deinitializes and frees the LCD framebuffers.</div></div>
<div class="ttc" id="agspgpu_8h_html_abf0a992835649b5fe90e95d8a58b8c45"><div class="ttname"><a href="gspgpu_8h.html#abf0a992835649b5fe90e95d8a58b8c45">gspWaitForVBlank</a></div><div class="ttdeci">#define gspWaitForVBlank()</div><div class="ttdoc">Waits for VBlank.</div><div class="ttdef"><b>Definition:</b> gspgpu.h:151</div></div>
<div class="ttc" id="ahid_8h_html_a531c35e38ede3ea4e5ba5afb24b29493a10072b5ee7aa1faf316434ecc9e2bb3a"><div class="ttname"><a href="hid_8h.html#a531c35e38ede3ea4e5ba5afb24b29493a10072b5ee7aa1faf316434ecc9e2bb3a">KEY_B</a></div><div class="ttdeci">@ KEY_B</div><div class="ttdoc">B.</div><div class="ttdef"><b>Definition:</b> hid.h:13</div></div>
<div class="ttc" id="ahid_8h_html_a531c35e38ede3ea4e5ba5afb24b29493a616a1f5c4ed36080ca954453084aea3b"><div class="ttname"><a href="hid_8h.html#a531c35e38ede3ea4e5ba5afb24b29493a616a1f5c4ed36080ca954453084aea3b">KEY_START</a></div><div class="ttdeci">@ KEY_START</div><div class="ttdoc">Start.</div><div class="ttdef"><b>Definition:</b> hid.h:15</div></div>
<div class="ttc" id="ahid_8h_html_aa2cababf764bf0b4297dc2e2fffe2a76"><div class="ttname"><a href="hid_8h.html#aa2cababf764bf0b4297dc2e2fffe2a76">hidKeysDown</a></div><div class="ttdeci">u32 hidKeysDown(void)</div><div class="ttdoc">Returns a bitmask of newly pressed buttons, this frame.</div></div>
<div class="ttc" id="ahid_8h_html_abbbf0e1f3a79a75e459e19f85a66bee6"><div class="ttname"><a href="hid_8h.html#abbbf0e1f3a79a75e459e19f85a66bee6">hidScanInput</a></div><div class="ttdeci">void hidScanInput(void)</div><div class="ttdoc">Scans HID for input data.</div></div>
<div class="ttc" id="arbtree_8h_html_a797a3e1c8507a7c7b4e051d3f1349154"><div class="ttname"><a href="rbtree_8h.html#a797a3e1c8507a7c7b4e051d3f1349154">__attribute__</a></div><div class="ttdeci">__attribute__((warn_unused_result)) rbtree_node_t *rbtree_insert(rbtree_t *tree</div><div class="ttdoc">Inserts a node into an rbtree.</div></div>
<div class="ttc" id="asoc_8h_html_a0c15255d27f548252f23860e1f7fe39b"><div class="ttname"><a href="soc_8h.html#a0c15255d27f548252f23860e1f7fe39b">socInit</a></div><div class="ttdeci">Result socInit(u32 *context_addr, u32 context_size)</div><div class="ttdoc">Initializes the SOC service.</div></div>
<div class="ttc" id="asoc_8h_html_a4c165678b18a16dccc315220ec61e1ee"><div class="ttname"><a href="soc_8h.html#a4c165678b18a16dccc315220ec61e1ee">socExit</a></div><div class="ttdeci">Result socExit(void)</div><div class="ttdoc">Closes the soc service.</div></div>
<div class="ttc" id="asoc_8h_html_ab7b49a1dc7a37a50ea146982bc01eee1"><div class="ttname"><a href="soc_8h.html#ab7b49a1dc7a37a50ea146982bc01eee1">gethostid</a></div><div class="ttdeci">long gethostid(void)</div><div class="ttdoc">Gets the system's host ID.</div></div>
<div class="ttc" id="astructsockaddr__in_html"><div class="ttname"><a href="structsockaddr__in.html">sockaddr_in</a></div><div class="ttdef"><b>Definition:</b> in.h:34</div></div>
<div class="ttc" id="astructsockaddr_html"><div class="ttname"><a href="structsockaddr.html">sockaddr</a></div><div class="ttdef"><b>Definition:</b> socket.h:52</div></div>
<div class="ttc" id="atypes_8h_html_ae9b1af5c037e57a98884758875d3a7c4"><div class="ttname"><a href="types_8h.html#ae9b1af5c037e57a98884758875d3a7c4">s32</a></div><div class="ttdeci">int32_t s32</div><div class="ttdoc">32-bit signed integer</div><div class="ttdef"><b>Definition:</b> types.h:28</div></div>
<div class="ttc" id="atypes_8h_html_afaa62991928fb9fb18ff0db62a040aba"><div class="ttname"><a href="types_8h.html#afaa62991928fb9fb18ff0db62a040aba">u32</a></div><div class="ttdeci">uint32_t u32</div><div class="ttdoc">32-bit unsigned integer</div><div class="ttdef"><b>Definition:</b> types.h:23</div></div>
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