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 <span id="projectnumber">2.2.1</span>
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<div id="projectbrief">Event notification library</div>
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<a href="listener_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu></span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * Redistribution and use in source and binary forms, with or without</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * modification, are permitted provided that the following conditions</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * are met:</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * notice, this list of conditions and the following disclaimer.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * notice, this list of conditions and the following disclaimer in the</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * documentation and/or other materials provided with the distribution.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * 3. The name of the author may not be used to endorse or promote products</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * derived from this software without specific prior written permission.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#ifndef EVENT2_LISTENER_H_INCLUDED_</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#define EVENT2_LISTENER_H_INCLUDED_</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  </div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <event2/visibility.h></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  </div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">extern</span> <span class="stringliteral">"C"</span> {</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include <<a class="code" href="event_8h.html">event2/event.h</a>></span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">struct </span>sockaddr;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="keyword">struct </span>evconnlistener;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  </div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="keyword">typedef</span> void (*evconnlistener_cb)(<span class="keyword">struct </span>evconnlistener *, <a class="code" href="util_8h.html#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a>, <span class="keyword">struct </span>sockaddr *, <span class="keywordtype">int</span> socklen, <span class="keywordtype">void</span> *);</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  </div>
<div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="listener_8h.html#a925d682ff37636dc08b045aaeff6b538"> 59</a></span> <span class="keyword">typedef</span> void (*<a class="code" href="listener_8h.html#a925d682ff37636dc08b045aaeff6b538">evconnlistener_errorcb</a>)(<span class="keyword">struct </span>evconnlistener *, <span class="keywordtype">void</span> *);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  </div>
<div class="line"><a name="l00063"></a><span class="lineno"><a class="line" href="listener_8h.html#ac19549ba5b3746557d5fd8be8a9c5eb3"> 63</a></span> <span class="preprocessor">#define LEV_OPT_LEAVE_SOCKETS_BLOCKING (1u<<0)</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  </div>
<div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="listener_8h.html#a4b2de09b129675a41696a89e5c58de53"> 66</a></span> <span class="preprocessor">#define LEV_OPT_CLOSE_ON_FREE (1u<<1)</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  </div>
<div class="line"><a name="l00068"></a><span class="lineno"><a class="line" href="listener_8h.html#af6f307bd279abe88586fb56672fcf6c8"> 68</a></span> <span class="preprocessor">#define LEV_OPT_CLOSE_ON_EXEC (1u<<2)</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  </div>
<div class="line"><a name="l00071"></a><span class="lineno"><a class="line" href="listener_8h.html#a15337d63b237ec11b0781656aad90662"> 71</a></span> <span class="preprocessor">#define LEV_OPT_REUSEABLE (1u<<3)</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  </div>
<div class="line"><a name="l00074"></a><span class="lineno"><a class="line" href="listener_8h.html#a7bcc41438093090d28a7c98b899db9ba"> 74</a></span> <span class="preprocessor">#define LEV_OPT_THREADSAFE (1u<<4)</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  </div>
<div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="listener_8h.html#ad96f043f9d9b2f028536fe832061daf6"> 77</a></span> <span class="preprocessor">#define LEV_OPT_DISABLED (1u<<5)</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  </div>
<div class="line"><a name="l00091"></a><span class="lineno"><a class="line" href="listener_8h.html#a5b1903214eb069f47ae9119793307b89"> 91</a></span> <span class="preprocessor">#define LEV_OPT_DEFERRED_ACCEPT (1u<<6)</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  </div>
<div class="line"><a name="l00104"></a><span class="lineno"><a class="line" href="listener_8h.html#af417f499a89518d16eb3be4098e504c7"> 104</a></span> <span class="preprocessor">#define LEV_OPT_REUSEABLE_PORT (1u<<7)</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  </div>
<div class="line"><a name="l00116"></a><span class="lineno"><a class="line" href="listener_8h.html#a3a54f81b44cec176dffe72a1aa22d8e6"> 116</a></span> <span class="preprocessor">#define LEV_OPT_BIND_IPV6ONLY (1u<<8)</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  </div>
<div class="line"><a name="l00125"></a><span class="lineno"><a class="line" href="listener_8h.html#afc396525343a6848149d6c0f7cd11ed5"> 125</a></span> <span class="preprocessor">#define LEV_OPT_BIND_IPV4_AND_IPV6 (1u<<9)</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  </div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> EVENT2_EXPORT_SYMBOL</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="keyword">struct </span>evconnlistener *<a class="code" href="listener_8h.html#aa07ae1878cf56d58579b025dd1620c91">evconnlistener_new</a>(<span class="keyword">struct</span> <a class="code" href="structevent__base.html">event_base</a> *base,</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  evconnlistener_cb cb, <span class="keywordtype">void</span> *ptr, <span class="keywordtype">unsigned</span> flags, <span class="keywordtype">int</span> backlog,</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <a class="code" href="util_8h.html#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a> fd);</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> EVENT2_EXPORT_SYMBOL</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="keyword">struct </span>evconnlistener *<a class="code" href="listener_8h.html#a29076ec56e051fb75aa48f30cf9111ee">evconnlistener_new_bind</a>(<span class="keyword">struct</span> <a class="code" href="structevent__base.html">event_base</a> *base,</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  evconnlistener_cb cb, <span class="keywordtype">void</span> *ptr, <span class="keywordtype">unsigned</span> flags, <span class="keywordtype">int</span> backlog,</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keyword">const</span> <span class="keyword">struct</span> sockaddr *sa, <span class="keywordtype">int</span> socklen);</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> EVENT2_EXPORT_SYMBOL</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="keywordtype">void</span> <a class="code" href="listener_8h.html#a0f7f3d276f08669c2a9b1817941aa68f">evconnlistener_free</a>(<span class="keyword">struct</span> evconnlistener *lev);</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> EVENT2_EXPORT_SYMBOL</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="keywordtype">int</span> <a class="code" href="listener_8h.html#a890717d86a18e2bd82655fd342b1973f">evconnlistener_enable</a>(<span class="keyword">struct</span> evconnlistener *lev);</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> EVENT2_EXPORT_SYMBOL</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="keywordtype">int</span> <a class="code" href="listener_8h.html#a1f772caf7e2f01276ec33641eb32418c">evconnlistener_disable</a>(<span class="keyword">struct</span> evconnlistener *lev);</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  </div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> EVENT2_EXPORT_SYMBOL</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="keyword">struct </span><a class="code" href="structevent__base.html">event_base</a> *<a class="code" href="listener_8h.html#ab3492fa1741d2b50e151505c0582334d">evconnlistener_get_base</a>(<span class="keyword">struct</span> evconnlistener *lev);</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  </div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> EVENT2_EXPORT_SYMBOL</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <a class="code" href="util_8h.html#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a> <a class="code" href="listener_8h.html#a56e8de702931f3960edd84617e6c2fb6">evconnlistener_get_fd</a>(<span class="keyword">struct</span> evconnlistener *lev);</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  </div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> EVENT2_EXPORT_SYMBOL</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="keywordtype">void</span> <a class="code" href="listener_8h.html#abf8c1793319829ff9c6d8ce4fea6b342">evconnlistener_set_cb</a>(<span class="keyword">struct</span> evconnlistener *lev,</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  evconnlistener_cb cb, <span class="keywordtype">void</span> *arg);</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  </div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> EVENT2_EXPORT_SYMBOL</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="keywordtype">void</span> <a class="code" href="listener_8h.html#a328c8f6b2c2b3c87507ca6a4d5790da1">evconnlistener_set_error_cb</a>(<span class="keyword">struct</span> evconnlistener *lev,</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <a class="code" href="listener_8h.html#a925d682ff37636dc08b045aaeff6b538">evconnlistener_errorcb</a> errorcb);</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  </div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="preprocessor">#ifdef __cplusplus</span></div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> }</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  </div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="preprocessor">#endif</span></div>
</div><!-- fragment --></div><!-- contents -->
<div class="ttc" id="astructevent__base_html"><div class="ttname"><a href="structevent__base.html">event_base</a></div><div class="ttdoc">Structure to hold information and state for a Libevent dispatch loop.</div><div class="ttdef"><b>Definition:</b> event.h:219</div></div>
<div class="ttc" id="alistener_8h_html_a56e8de702931f3960edd84617e6c2fb6"><div class="ttname"><a href="listener_8h.html#a56e8de702931f3960edd84617e6c2fb6">evconnlistener_get_fd</a></div><div class="ttdeci">EVENT2_EXPORT_SYMBOL evutil_socket_t evconnlistener_get_fd(struct evconnlistener *lev)</div><div class="ttdoc">Return the socket that an evconnlistner is listening on.</div></div>
<div class="ttc" id="alistener_8h_html_aa07ae1878cf56d58579b025dd1620c91"><div class="ttname"><a href="listener_8h.html#aa07ae1878cf56d58579b025dd1620c91">evconnlistener_new</a></div><div class="ttdeci">EVENT2_EXPORT_SYMBOL struct evconnlistener * evconnlistener_new(struct event_base *base, evconnlistener_cb cb, void *ptr, unsigned flags, int backlog, evutil_socket_t fd)</div><div class="ttdoc">Allocate a new evconnlistener object to listen for incoming TCP connections on a given file descripto...</div></div>
<div class="ttc" id="aevent_8h_html"><div class="ttname"><a href="event_8h.html">event.h</a></div><div class="ttdoc">Core functions for waiting for and receiving events, and using event bases.</div></div>
<div class="ttc" id="alistener_8h_html_a29076ec56e051fb75aa48f30cf9111ee"><div class="ttname"><a href="listener_8h.html#a29076ec56e051fb75aa48f30cf9111ee">evconnlistener_new_bind</a></div><div class="ttdeci">EVENT2_EXPORT_SYMBOL struct evconnlistener * evconnlistener_new_bind(struct event_base *base, evconnlistener_cb cb, void *ptr, unsigned flags, int backlog, const struct sockaddr *sa, int socklen)</div><div class="ttdoc">Allocate a new evconnlistener object to listen for incoming TCP connections on a given address.</div></div>
<div class="ttc" id="alistener_8h_html_a925d682ff37636dc08b045aaeff6b538"><div class="ttname"><a href="listener_8h.html#a925d682ff37636dc08b045aaeff6b538">evconnlistener_errorcb</a></div><div class="ttdeci">void(* evconnlistener_errorcb)(struct evconnlistener *, void *)</div><div class="ttdoc">A callback that we invoke when a listener encounters a non-retriable error.</div><div class="ttdef"><b>Definition:</b> listener.h:59</div></div>
<div class="ttc" id="alistener_8h_html_a1f772caf7e2f01276ec33641eb32418c"><div class="ttname"><a href="listener_8h.html#a1f772caf7e2f01276ec33641eb32418c">evconnlistener_disable</a></div><div class="ttdeci">EVENT2_EXPORT_SYMBOL int evconnlistener_disable(struct evconnlistener *lev)</div><div class="ttdoc">Stop listening for connections on an evconnlistener.</div></div>
<div class="ttc" id="alistener_8h_html_a0f7f3d276f08669c2a9b1817941aa68f"><div class="ttname"><a href="listener_8h.html#a0f7f3d276f08669c2a9b1817941aa68f">evconnlistener_free</a></div><div class="ttdeci">EVENT2_EXPORT_SYMBOL void evconnlistener_free(struct evconnlistener *lev)</div><div class="ttdoc">Disable and deallocate an evconnlistener.</div></div>
<div class="ttc" id="alistener_8h_html_abf8c1793319829ff9c6d8ce4fea6b342"><div class="ttname"><a href="listener_8h.html#abf8c1793319829ff9c6d8ce4fea6b342">evconnlistener_set_cb</a></div><div class="ttdeci">EVENT2_EXPORT_SYMBOL void evconnlistener_set_cb(struct evconnlistener *lev, evconnlistener_cb cb, void *arg)</div><div class="ttdoc">Change the callback on the listener to cb and its user_data to arg.</div></div>
<div class="ttc" id="alistener_8h_html_ab3492fa1741d2b50e151505c0582334d"><div class="ttname"><a href="listener_8h.html#ab3492fa1741d2b50e151505c0582334d">evconnlistener_get_base</a></div><div class="ttdeci">EVENT2_EXPORT_SYMBOL struct event_base * evconnlistener_get_base(struct evconnlistener *lev)</div><div class="ttdoc">Return an evconnlistener's associated event_base.</div></div>
<div class="ttc" id="alistener_8h_html_a890717d86a18e2bd82655fd342b1973f"><div class="ttname"><a href="listener_8h.html#a890717d86a18e2bd82655fd342b1973f">evconnlistener_enable</a></div><div class="ttdeci">EVENT2_EXPORT_SYMBOL int evconnlistener_enable(struct evconnlistener *lev)</div><div class="ttdoc">Re-enable an evconnlistener that has been disabled.</div></div>
<div class="ttc" id="alistener_8h_html_a328c8f6b2c2b3c87507ca6a4d5790da1"><div class="ttname"><a href="listener_8h.html#a328c8f6b2c2b3c87507ca6a4d5790da1">evconnlistener_set_error_cb</a></div><div class="ttdeci">EVENT2_EXPORT_SYMBOL void evconnlistener_set_error_cb(struct evconnlistener *lev, evconnlistener_errorcb errorcb)</div><div class="ttdoc">Set an evconnlistener's error callback.</div></div>
<div class="ttc" id="autil_8h_html_a7ef0023565082a65020f6e56be59fd0b"><div class="ttname"><a href="util_8h.html#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a></div><div class="ttdeci">#define evutil_socket_t</div><div class="ttdoc">A type wide enough to hold the output of "socket()" or "accept()".</div><div class="ttdef"><b>Definition:</b> util.h:310</div></div>
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