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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<div id="projectname">libevent<span id="projectnumber"> 2.2.1</span>
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<div id="projectbrief">Event notification library</div>
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<div class="headertitle"><div class="title">util.h File Reference</div></div>
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<p>Common convenience functions for cross-platform portability and related socket manipulations.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include <event2/visibility.h></code><br />
<code>#include <event2/event-config.h></code><br />
<code>#include <stdarg.h></code><br />
<code>#include <sys/socket.h></code><br />
<code>#include <time.h></code><br />
</div>
<p><a href="util_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 id="header-nested-classes" class="groupheader"><a id="nested-classes" name="nested-classes"></a>
Data Structures</h2></td></tr>
<tr class="memitem:evutil_5Faddrinfo" id="r_evutil_5Faddrinfo"><td class="memItemLeft">struct  </td><td class="memItemRight"><a class="el" href="structevutil__addrinfo.html">evutil_addrinfo</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">A definition of struct addrinfo for systems that lack it. <a href="structevutil__addrinfo.html#details">More...</a><br /></td></tr>
<tr class="memitem:evutil_5Fmonotonic_5Ftimer" id="r_evutil_5Fmonotonic_5Ftimer"><td class="memItemLeft">struct  </td><td class="memItemRight"><a class="el" href="structevutil__monotonic__timer.html">evutil_monotonic_timer</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Structure to hold information about a monotonic timer. <a href="structevutil__monotonic__timer.html#details">More...</a><br /></td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 id="header-define-members" class="groupheader"><a id="define-members" name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:a69bb004732dec77429200727420ad50c" id="r_a69bb004732dec77429200727420ad50c"><td class="memItemLeft"><a id="a69bb004732dec77429200727420ad50c" name="a69bb004732dec77429200727420ad50c"></a>
#define </td><td class="memItemRight"><b>EV_MONOT_FALLBACK</b>   2</td></tr>
<tr class="memitem:afb16e8c516213aebb503b6d764139d55" id="r_afb16e8c516213aebb503b6d764139d55"><td class="memItemLeft"><a id="afb16e8c516213aebb503b6d764139d55" name="afb16e8c516213aebb503b6d764139d55"></a>
#define </td><td class="memItemRight"><b>EV_MONOT_PRECISE</b>   1</td></tr>
<tr class="memitem:a1aa9b4bfabbeaae5ba828e808938fa2c" id="r_a1aa9b4bfabbeaae5ba828e808938fa2c"><td class="memItemLeft"><a id="a1aa9b4bfabbeaae5ba828e808938fa2c" name="a1aa9b4bfabbeaae5ba828e808938fa2c"></a>
#define </td><td class="memItemRight"><b>ev_socklen_t</b>   socklen_t</td></tr>
<tr class="memitem:aa70c6baf0f9ac418407245579ec2a168" id="r_aa70c6baf0f9ac418407245579ec2a168"><td class="memItemLeft">#define </td><td class="memItemRight"><a class="el" href="#aa70c6baf0f9ac418407245579ec2a168">EVUTIL_CLOSESOCKET</a>(s)</td></tr>
<tr class="memitem:a4c296955d33624c18bd4811730caa417" id="r_a4c296955d33624c18bd4811730caa417"><td class="memItemLeft">#define </td><td class="memItemRight"><a class="el" href="#a4c296955d33624c18bd4811730caa417">evutil_offsetof</a>(type, field)</td></tr>
<tr class="memdesc:a4c296955d33624c18bd4811730caa417"><td class="mdescLeft"> </td><td class="mdescRight">Replacement for offsetof on platforms that don't define it. <br /></td></tr>
<tr class="memitem:a7ef0023565082a65020f6e56be59fd0b" id="r_a7ef0023565082a65020f6e56be59fd0b"><td class="memItemLeft">#define </td><td class="memItemRight"><a class="el" href="#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a>   int</td></tr>
<tr class="memdesc:a7ef0023565082a65020f6e56be59fd0b"><td class="mdescLeft"> </td><td class="mdescRight">A type wide enough to hold the output of "socket()" or "accept()". <br /></td></tr>
<tr class="memitem:a1a42f43db6aaf6e99736329b6611175d" id="r_a1a42f43db6aaf6e99736329b6611175d"><td class="memItemLeft">#define </td><td class="memItemRight"><a class="el" href="#a1a42f43db6aaf6e99736329b6611175d">evutil_timercmp</a>(tvp, uvp, cmp)</td></tr>
<tr class="memdesc:a1a42f43db6aaf6e99736329b6611175d"><td class="mdescLeft"> </td><td class="mdescRight">Return true iff the tvp is related to uvp according to the relational operator cmp. <br /></td></tr>
<tr class="memitem:a393a0aee6129d132a3dd488366352bf2" id="r_a393a0aee6129d132a3dd488366352bf2"><td class="memItemLeft">#define </td><td class="memItemRight"><a class="el" href="#a393a0aee6129d132a3dd488366352bf2">evutil_timerisset</a>(tvp)</td></tr>
<tr id="define-members-0" class="groupHeader"><td colspan="2"><div class="groupHeader">Standard integer types.</div></td></tr>
<tr><td colspan="2" class="ititle"><div class="groupText"><p>Integer type definitions for types that are supposed to be defined in the C99-specified stdint.h.</p>
<p>Shamefully, some platforms do not include stdint.h, so we need to replace it. (If you are on a platform like this, your C headers are now over 10 years out of date. You should bug them to do something about this.)</p>
<p>We define:</p>
<dl>
<dt>ev_uint64_t, ev_uint32_t, ev_uint16_t, ev_uint8_t </dt>
<dd>unsigned integer types of exactly 64, 32, 16, and 8 bits respectively. </dd>
<dt>ev_int64_t, ev_int32_t, ev_int16_t, ev_int8_t </dt>
<dd>signed integer types of exactly 64, 32, 16, and 8 bits respectively. </dd>
<dt>ev_uintptr_t, ev_intptr_t </dt>
<dd>unsigned/signed integers large enough to hold a pointer without loss of bits. </dd>
<dt>ev_ssize_t </dt>
<dd>A signed type of the same size as size_t </dd>
<dt>ev_off_t </dt>
<dd>A signed type typically used to represent offsets within a (potentially large) file </dd>
</dl>
</div></td></tr>
<tr class="memitem:a5943ff8aa2063dd531c7cbc7f20a1e55" id="r_a5943ff8aa2063dd531c7cbc7f20a1e55"><td class="memItemLeft"><a id="a5943ff8aa2063dd531c7cbc7f20a1e55" name="a5943ff8aa2063dd531c7cbc7f20a1e55"></a>
#define </td><td class="memItemRight"><b>ev_int16_t</b>   ...</td></tr>
<tr class="memitem:a91a83fba6bcb61a80774e2533fa1da1b" id="r_a91a83fba6bcb61a80774e2533fa1da1b"><td class="memItemLeft"><a id="a91a83fba6bcb61a80774e2533fa1da1b" name="a91a83fba6bcb61a80774e2533fa1da1b"></a>
#define </td><td class="memItemRight"><b>ev_int32_t</b>   ...</td></tr>
<tr class="memitem:a22ebbcfd82e30a022792cc0aef0a0049" id="r_a22ebbcfd82e30a022792cc0aef0a0049"><td class="memItemLeft"><a id="a22ebbcfd82e30a022792cc0aef0a0049" name="a22ebbcfd82e30a022792cc0aef0a0049"></a>
#define </td><td class="memItemRight"><b>ev_int64_t</b>   ...</td></tr>
<tr class="memitem:ab642ae86b43a6d75c52811eb686f0837" id="r_ab642ae86b43a6d75c52811eb686f0837"><td class="memItemLeft"><a id="ab642ae86b43a6d75c52811eb686f0837" name="ab642ae86b43a6d75c52811eb686f0837"></a>
#define </td><td class="memItemRight"><b>ev_int8_t</b>   ...</td></tr>
<tr class="memitem:a4913c495b489d419353b3d1512505ea2" id="r_a4913c495b489d419353b3d1512505ea2"><td class="memItemLeft"><a id="a4913c495b489d419353b3d1512505ea2" name="a4913c495b489d419353b3d1512505ea2"></a>
#define </td><td class="memItemRight"><b>ev_intptr_t</b>   ev_int32_t</td></tr>
<tr class="memitem:a2f968b0d453ef37a233e2d40860296a6" id="r_a2f968b0d453ef37a233e2d40860296a6"><td class="memItemLeft"><a id="a2f968b0d453ef37a233e2d40860296a6" name="a2f968b0d453ef37a233e2d40860296a6"></a>
#define </td><td class="memItemRight"><b>ev_off_t</b>   ...</td></tr>
<tr class="memitem:a9fce2c187cee381db4bf5276f76a39e8" id="r_a9fce2c187cee381db4bf5276f76a39e8"><td class="memItemLeft"><a id="a9fce2c187cee381db4bf5276f76a39e8" name="a9fce2c187cee381db4bf5276f76a39e8"></a>
#define </td><td class="memItemRight"><b>ev_ssize_t</b>   ssize_t</td></tr>
<tr class="memitem:a9cc03c0ef4fc4327e373b079528ca049" id="r_a9cc03c0ef4fc4327e373b079528ca049"><td class="memItemLeft"><a id="a9cc03c0ef4fc4327e373b079528ca049" name="a9cc03c0ef4fc4327e373b079528ca049"></a>
#define </td><td class="memItemRight"><b>ev_uint16_t</b>   ...</td></tr>
<tr class="memitem:a43b2386e75123100c6179f7f14f8fda2" id="r_a43b2386e75123100c6179f7f14f8fda2"><td class="memItemLeft"><a id="a43b2386e75123100c6179f7f14f8fda2" name="a43b2386e75123100c6179f7f14f8fda2"></a>
#define </td><td class="memItemRight"><b>ev_uint32_t</b>   ...</td></tr>
<tr class="memitem:a58f6d4822116b1492238ea9b0b1469f9" id="r_a58f6d4822116b1492238ea9b0b1469f9"><td class="memItemLeft"><a id="a58f6d4822116b1492238ea9b0b1469f9" name="a58f6d4822116b1492238ea9b0b1469f9"></a>
#define </td><td class="memItemRight"><b>ev_uint64_t</b>   ...</td></tr>
<tr class="memitem:ad9052cd1d14b92812de0796d84af5604" id="r_ad9052cd1d14b92812de0796d84af5604"><td class="memItemLeft"><a id="ad9052cd1d14b92812de0796d84af5604" name="ad9052cd1d14b92812de0796d84af5604"></a>
#define </td><td class="memItemRight"><b>ev_uint8_t</b>   ...</td></tr>
<tr class="memitem:a6bf36939a205bd52df25c40fe44b7fd7" id="r_a6bf36939a205bd52df25c40fe44b7fd7"><td class="memItemLeft"><a id="a6bf36939a205bd52df25c40fe44b7fd7" name="a6bf36939a205bd52df25c40fe44b7fd7"></a>
#define </td><td class="memItemRight"><b>ev_uintptr_t</b>   ev_uint32_t</td></tr>
<tr id="define-members-1" class="groupHeader"><td colspan="2"><div class="groupHeader">Limits for integer types</div></td></tr>
<tr><td colspan="2" class="ititle"><div class="groupText"><p>These macros hold the largest or smallest values possible for the ev_[u]int*_t types. </p>
</div></td></tr>
<tr class="memitem:af6271a010b87f8e78edfb3d576d16909" id="r_af6271a010b87f8e78edfb3d576d16909"><td class="memItemLeft"><a id="af6271a010b87f8e78edfb3d576d16909" name="af6271a010b87f8e78edfb3d576d16909"></a>
#define </td><td class="memItemRight"><b>EV_INT16_MAX</b>   ((ev_int16_t) 0x7fffL)</td></tr>
<tr class="memitem:a10afd44462363963e6cdfc20e10d250a" id="r_a10afd44462363963e6cdfc20e10d250a"><td class="memItemLeft"><a id="a10afd44462363963e6cdfc20e10d250a" name="a10afd44462363963e6cdfc20e10d250a"></a>
#define </td><td class="memItemRight"><b>EV_INT16_MIN</b>   ((-EV_INT16_MAX) - 1)</td></tr>
<tr class="memitem:adbfb8c4ad3c2b8d2bec82787c9f0eaa3" id="r_adbfb8c4ad3c2b8d2bec82787c9f0eaa3"><td class="memItemLeft"><a id="adbfb8c4ad3c2b8d2bec82787c9f0eaa3" name="adbfb8c4ad3c2b8d2bec82787c9f0eaa3"></a>
#define </td><td class="memItemRight"><b>EV_INT32_MAX</b>   ((ev_int32_t) 0x7fffffffL)</td></tr>
<tr class="memitem:a7899efdfa42ebe54093c85fbc35ba8e5" id="r_a7899efdfa42ebe54093c85fbc35ba8e5"><td class="memItemLeft"><a id="a7899efdfa42ebe54093c85fbc35ba8e5" name="a7899efdfa42ebe54093c85fbc35ba8e5"></a>
#define </td><td class="memItemRight"><b>EV_INT32_MIN</b>   ((-EV_INT32_MAX) - 1)</td></tr>
<tr class="memitem:a7a5b615c4a5ffb69122263c69d8bb091" id="r_a7a5b615c4a5ffb69122263c69d8bb091"><td class="memItemLeft"><a id="a7a5b615c4a5ffb69122263c69d8bb091" name="a7a5b615c4a5ffb69122263c69d8bb091"></a>
#define </td><td class="memItemRight"><b>EV_INT64_MAX</b>   ((((ev_int64_t) 0x7fffffffL) << 32) | 0xffffffffL)</td></tr>
<tr class="memitem:a20073b67f3e9cdda20215246b11c4f6d" id="r_a20073b67f3e9cdda20215246b11c4f6d"><td class="memItemLeft"><a id="a20073b67f3e9cdda20215246b11c4f6d" name="a20073b67f3e9cdda20215246b11c4f6d"></a>
#define </td><td class="memItemRight"><b>EV_INT64_MIN</b>   ((-EV_INT64_MAX) - 1)</td></tr>
<tr class="memitem:ae959d5851ca0690f9da6e47fbb8056c9" id="r_ae959d5851ca0690f9da6e47fbb8056c9"><td class="memItemLeft"><a id="ae959d5851ca0690f9da6e47fbb8056c9" name="ae959d5851ca0690f9da6e47fbb8056c9"></a>
#define </td><td class="memItemRight"><b>EV_INT8_MAX</b>   127</td></tr>
<tr class="memitem:aa4adcc386a7cb06436af4618301c8b03" id="r_aa4adcc386a7cb06436af4618301c8b03"><td class="memItemLeft"><a id="aa4adcc386a7cb06436af4618301c8b03" name="aa4adcc386a7cb06436af4618301c8b03"></a>
#define </td><td class="memItemRight"><b>EV_INT8_MIN</b>   ((-EV_INT8_MAX) - 1)</td></tr>
<tr class="memitem:af85ec3c0198df9bbb370d9c70f1fd2f4" id="r_af85ec3c0198df9bbb370d9c70f1fd2f4"><td class="memItemLeft"><a id="af85ec3c0198df9bbb370d9c70f1fd2f4" name="af85ec3c0198df9bbb370d9c70f1fd2f4"></a>
#define </td><td class="memItemRight"><b>EV_UINT16_MAX</b>   ((ev_uint16_t)0xffffUL)</td></tr>
<tr class="memitem:a815ab1b931ad8d2b11da526b9071282a" id="r_a815ab1b931ad8d2b11da526b9071282a"><td class="memItemLeft"><a id="a815ab1b931ad8d2b11da526b9071282a" name="a815ab1b931ad8d2b11da526b9071282a"></a>
#define </td><td class="memItemRight"><b>EV_UINT32_MAX</b>   ((ev_uint32_t)0xffffffffUL)</td></tr>
<tr class="memitem:a34cff4b5f64165a133fd51d3004964db" id="r_a34cff4b5f64165a133fd51d3004964db"><td class="memItemLeft"><a id="a34cff4b5f64165a133fd51d3004964db" name="a34cff4b5f64165a133fd51d3004964db"></a>
#define </td><td class="memItemRight"><b>EV_UINT64_MAX</b>   ((((ev_uint64_t)0xffffffffUL) << 32) | 0xffffffffUL)</td></tr>
<tr class="memitem:a8af5a509193ad75cdd20e77a8422d84d" id="r_a8af5a509193ad75cdd20e77a8422d84d"><td class="memItemLeft"><a id="a8af5a509193ad75cdd20e77a8422d84d" name="a8af5a509193ad75cdd20e77a8422d84d"></a>
#define </td><td class="memItemRight"><b>EV_UINT8_MAX</b>   255</td></tr>
<tr id="define-members-2" class="groupHeader"><td colspan="2"><div class="groupHeader">Limits for SIZE_T and SSIZE_T</div></td></tr>
<tr class="memitem:a2b6a9c2fa6a1ba42d79e2f9118f9670c" id="r_a2b6a9c2fa6a1ba42d79e2f9118f9670c"><td class="memItemLeft"><a id="a2b6a9c2fa6a1ba42d79e2f9118f9670c" name="a2b6a9c2fa6a1ba42d79e2f9118f9670c"></a>
#define </td><td class="memItemRight"><b>EV_SIZE_MAX</b>   ...</td></tr>
<tr class="memitem:a142028f0a0d7248168a3aaca652851c3" id="r_a142028f0a0d7248168a3aaca652851c3"><td class="memItemLeft"><a id="a142028f0a0d7248168a3aaca652851c3" name="a142028f0a0d7248168a3aaca652851c3"></a>
#define </td><td class="memItemRight"><b>EV_SSIZE_MAX</b>   ...</td></tr>
<tr class="memitem:a59e6c7724ce1f7e0562d6e24021acb10" id="r_a59e6c7724ce1f7e0562d6e24021acb10"><td class="memItemLeft"><a id="a59e6c7724ce1f7e0562d6e24021acb10" name="a59e6c7724ce1f7e0562d6e24021acb10"></a>
#define </td><td class="memItemRight"><b>EV_SSIZE_MIN</b>   ((-EV_SSIZE_MAX) - 1)</td></tr>
<tr id="define-members-3" class="groupHeader"><td colspan="2"><div class="groupHeader">Socket error functions</div></td></tr>
<tr><td colspan="2" class="ititle"><div class="groupText"><p>These functions are needed for making programs compatible between Windows and Unix-like platforms.</p>
<p>You see, Winsock handles socket errors differently from the rest of the world. Elsewhere, a socket error is like any other error and is stored in errno. But winsock functions require you to retrieve the error with a special function, and don't let you use strerror for the error codes. And handling EWOULDBLOCK is ... different. </p>
</div></td></tr>
<tr class="memitem:a3c79bbe4f3ac17dd484e6d5c262b17df" id="r_a3c79bbe4f3ac17dd484e6d5c262b17df"><td class="memItemLeft"><a id="a3c79bbe4f3ac17dd484e6d5c262b17df" name="a3c79bbe4f3ac17dd484e6d5c262b17df"></a>
#define </td><td class="memItemRight"><b>EVUTIL_INVALID_SOCKET</b>   -1</td></tr>
<tr class="memitem:ae8b4fae7790599f7b58e8c269f6b29d8" id="r_ae8b4fae7790599f7b58e8c269f6b29d8"><td class="memItemLeft">#define </td><td class="memItemRight"><a class="el" href="#ae8b4fae7790599f7b58e8c269f6b29d8">EVUTIL_SET_SOCKET_ERROR</a>(errcode)</td></tr>
<tr class="memdesc:ae8b4fae7790599f7b58e8c269f6b29d8"><td class="mdescLeft"> </td><td class="mdescRight">Replace the most recent socket error with errcode. <br /></td></tr>
<tr class="memitem:a9a94a2e72982e708333486cf72aab941" id="r_a9a94a2e72982e708333486cf72aab941"><td class="memItemLeft">#define </td><td class="memItemRight"><a class="el" href="#a9a94a2e72982e708333486cf72aab941">EVUTIL_SOCKET_ERROR</a>()</td></tr>
<tr class="memdesc:a9a94a2e72982e708333486cf72aab941"><td class="mdescLeft"> </td><td class="mdescRight">Return the most recent socket error. <br /></td></tr>
<tr class="memitem:ad5ea5ef81ddcfb299e4867d362ad8654" id="r_ad5ea5ef81ddcfb299e4867d362ad8654"><td class="memItemLeft">#define </td><td class="memItemRight"><a class="el" href="#ad5ea5ef81ddcfb299e4867d362ad8654">evutil_socket_error_to_string</a>(errcode)</td></tr>
<tr class="memdesc:ad5ea5ef81ddcfb299e4867d362ad8654"><td class="mdescLeft"> </td><td class="mdescRight">Convert a socket error to a string. <br /></td></tr>
<tr class="memitem:a28f952fb0f16b057d931fd38ee9bdf5e" id="r_a28f952fb0f16b057d931fd38ee9bdf5e"><td class="memItemLeft">#define </td><td class="memItemRight"><a class="el" href="#a28f952fb0f16b057d931fd38ee9bdf5e">evutil_socket_geterror</a>(sock)</td></tr>
<tr class="memdesc:a28f952fb0f16b057d931fd38ee9bdf5e"><td class="mdescLeft"> </td><td class="mdescRight">Return the most recent socket error to occur on sock. <br /></td></tr>
<tr id="define-members-4" class="groupHeader"><td colspan="2"><div class="groupHeader">Manipulation macros for struct timeval.</div></td></tr>
<tr><td colspan="2" class="ititle"><div class="groupText"><p>We define replacements for timeradd, timersub, timerclear, timercmp, and timerisset. </p>
</div></td></tr>
<tr class="memitem:a6182f91a8aede88fac748b3f424cbb6d" id="r_a6182f91a8aede88fac748b3f424cbb6d"><td class="memItemLeft">#define </td><td class="memItemRight"><a class="el" href="#a6182f91a8aede88fac748b3f424cbb6d">evutil_timeradd</a>(tvp, uvp, vvp)</td></tr>
<tr class="memitem:add4999b82eab8bcb8becc8cb079341a0" id="r_add4999b82eab8bcb8becc8cb079341a0"><td class="memItemLeft">#define </td><td class="memItemRight"><a class="el" href="#add4999b82eab8bcb8becc8cb079341a0">evutil_timerclear</a>(tvp)</td></tr>
<tr class="memitem:ab75cdb8eae7b33eac738c46356967399" id="r_ab75cdb8eae7b33eac738c46356967399"><td class="memItemLeft">#define </td><td class="memItemRight"><a class="el" href="#ab75cdb8eae7b33eac738c46356967399">evutil_timersub</a>(tvp, uvp, vvp)</td></tr>
<tr id="define-members-5" class="groupHeader"><td colspan="2"><div class="groupHeader">evutil_getaddrinfo() error codes</div></td></tr>
<tr><td colspan="2" class="ititle"><div class="groupText"><p>These values are possible error codes for <a class="el" href="#a0f36c2fc48c644a4f56347a25c585cc9" title="This function clones getaddrinfo for systems that don't have it.">evutil_getaddrinfo()</a> and related functions. </p>
</div></td></tr>
<tr class="memitem:a1162c61313f61eff48a9533a3309f739" id="r_a1162c61313f61eff48a9533a3309f739"><td class="memItemLeft"><a id="a1162c61313f61eff48a9533a3309f739" name="a1162c61313f61eff48a9533a3309f739"></a>
#define </td><td class="memItemRight"><b>EVUTIL_AI_ADDRCONFIG</b>   0x40000</td></tr>
<tr class="memitem:a437bacd5a8915b541a3e38c965932297" id="r_a437bacd5a8915b541a3e38c965932297"><td class="memItemLeft"><a id="a437bacd5a8915b541a3e38c965932297" name="a437bacd5a8915b541a3e38c965932297"></a>
#define </td><td class="memItemRight"><b>EVUTIL_AI_ALL</b>   0x20000</td></tr>
<tr class="memitem:a1b1fbbc2f3b038e60fd97a620bff9230" id="r_a1b1fbbc2f3b038e60fd97a620bff9230"><td class="memItemLeft"><a id="a1b1fbbc2f3b038e60fd97a620bff9230" name="a1b1fbbc2f3b038e60fd97a620bff9230"></a>
#define </td><td class="memItemRight"><b>EVUTIL_AI_CANONNAME</b>   0x2000</td></tr>
<tr class="memitem:a145a3766f56a33a6d845cfd0dba1890d" id="r_a145a3766f56a33a6d845cfd0dba1890d"><td class="memItemLeft"><a id="a145a3766f56a33a6d845cfd0dba1890d" name="a145a3766f56a33a6d845cfd0dba1890d"></a>
#define </td><td class="memItemRight"><b>EVUTIL_AI_NUMERICHOST</b>   0x4000</td></tr>
<tr class="memitem:a067c788a683f74e43e87098a68b37e69" id="r_a067c788a683f74e43e87098a68b37e69"><td class="memItemLeft"><a id="a067c788a683f74e43e87098a68b37e69" name="a067c788a683f74e43e87098a68b37e69"></a>
#define </td><td class="memItemRight"><b>EVUTIL_AI_NUMERICSERV</b>   0x8000</td></tr>
<tr class="memitem:a2611f48d74207f6e996189e71ca9742f" id="r_a2611f48d74207f6e996189e71ca9742f"><td class="memItemLeft"><a id="a2611f48d74207f6e996189e71ca9742f" name="a2611f48d74207f6e996189e71ca9742f"></a>
#define </td><td class="memItemRight"><b>EVUTIL_AI_PASSIVE</b>   0x1000</td></tr>
<tr class="memitem:abbc6a3beb4ecf5b653a871949a49b53a" id="r_abbc6a3beb4ecf5b653a871949a49b53a"><td class="memItemLeft"><a id="abbc6a3beb4ecf5b653a871949a49b53a" name="abbc6a3beb4ecf5b653a871949a49b53a"></a>
#define </td><td class="memItemRight"><b>EVUTIL_AI_V4MAPPED</b>   0x10000</td></tr>
<tr class="memitem:aaf1a2e7213ceab1be80a752ec8cbd109" id="r_aaf1a2e7213ceab1be80a752ec8cbd109"><td class="memItemLeft"><a id="aaf1a2e7213ceab1be80a752ec8cbd109" name="aaf1a2e7213ceab1be80a752ec8cbd109"></a>
#define </td><td class="memItemRight"><b>EVUTIL_EAI_ADDRFAMILY</b>   -901</td></tr>
<tr class="memitem:ae1cb726c0bf1ff8907dfc3b4171742ac" id="r_ae1cb726c0bf1ff8907dfc3b4171742ac"><td class="memItemLeft"><a id="ae1cb726c0bf1ff8907dfc3b4171742ac" name="ae1cb726c0bf1ff8907dfc3b4171742ac"></a>
#define </td><td class="memItemRight"><b>EVUTIL_EAI_AGAIN</b>   -902</td></tr>
<tr class="memitem:ac5f1ed6215f25714f371551cb7467ad7" id="r_ac5f1ed6215f25714f371551cb7467ad7"><td class="memItemLeft"><a id="ac5f1ed6215f25714f371551cb7467ad7" name="ac5f1ed6215f25714f371551cb7467ad7"></a>
#define </td><td class="memItemRight"><b>EVUTIL_EAI_BADFLAGS</b>   -903</td></tr>
<tr class="memitem:a34127164b338d82707034566b100b4cb" id="r_a34127164b338d82707034566b100b4cb"><td class="memItemLeft"><a id="a34127164b338d82707034566b100b4cb" name="a34127164b338d82707034566b100b4cb"></a>
#define </td><td class="memItemRight"><b>EVUTIL_EAI_CANCEL</b>   -90001</td></tr>
<tr class="memitem:a76916ba557e677dafe9c1fd7da89f2b3" id="r_a76916ba557e677dafe9c1fd7da89f2b3"><td class="memItemLeft"><a id="a76916ba557e677dafe9c1fd7da89f2b3" name="a76916ba557e677dafe9c1fd7da89f2b3"></a>
#define </td><td class="memItemRight"><b>EVUTIL_EAI_FAIL</b>   -904</td></tr>
<tr class="memitem:a0df5ae5495d39cb471ef5403c2823ab4" id="r_a0df5ae5495d39cb471ef5403c2823ab4"><td class="memItemLeft"><a id="a0df5ae5495d39cb471ef5403c2823ab4" name="a0df5ae5495d39cb471ef5403c2823ab4"></a>
#define </td><td class="memItemRight"><b>EVUTIL_EAI_FAMILY</b>   -905</td></tr>
<tr class="memitem:a03351808979dfac04060773ebfd3c06b" id="r_a03351808979dfac04060773ebfd3c06b"><td class="memItemLeft"><a id="a03351808979dfac04060773ebfd3c06b" name="a03351808979dfac04060773ebfd3c06b"></a>
#define </td><td class="memItemRight"><b>EVUTIL_EAI_MEMORY</b>   -906</td></tr>
<tr class="memitem:a1d7b69a78006c0f48d88f88e9b55334b" id="r_a1d7b69a78006c0f48d88f88e9b55334b"><td class="memItemLeft"><a id="a1d7b69a78006c0f48d88f88e9b55334b" name="a1d7b69a78006c0f48d88f88e9b55334b"></a>
#define </td><td class="memItemRight"><b>EVUTIL_EAI_NODATA</b>   -907</td></tr>
<tr class="memitem:ab100c4d4e222d5cdfa2aebcf3a0140e9" id="r_ab100c4d4e222d5cdfa2aebcf3a0140e9"><td class="memItemLeft"><a id="ab100c4d4e222d5cdfa2aebcf3a0140e9" name="ab100c4d4e222d5cdfa2aebcf3a0140e9"></a>
#define </td><td class="memItemRight"><b>EVUTIL_EAI_NONAME</b>   -908</td></tr>
<tr class="memitem:ab2cc1d8d4eead1bc0e15eaae2edaf668" id="r_ab2cc1d8d4eead1bc0e15eaae2edaf668"><td class="memItemLeft"><a id="ab2cc1d8d4eead1bc0e15eaae2edaf668" name="ab2cc1d8d4eead1bc0e15eaae2edaf668"></a>
#define </td><td class="memItemRight"><b>EVUTIL_EAI_SERVICE</b>   -909</td></tr>
<tr class="memitem:ac30b335f48757b2ba10da69f80a87a46" id="r_ac30b335f48757b2ba10da69f80a87a46"><td class="memItemLeft"><a id="ac30b335f48757b2ba10da69f80a87a46" name="ac30b335f48757b2ba10da69f80a87a46"></a>
#define </td><td class="memItemRight"><b>EVUTIL_EAI_SOCKTYPE</b>   -910</td></tr>
<tr class="memitem:a03273ded49de60ab08e489b7d5d5e17e" id="r_a03273ded49de60ab08e489b7d5d5e17e"><td class="memItemLeft"><a id="a03273ded49de60ab08e489b7d5d5e17e" name="a03273ded49de60ab08e489b7d5d5e17e"></a>
#define </td><td class="memItemRight"><b>EVUTIL_EAI_SYSTEM</b>   -911</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 id="header-func-members" class="groupheader"><a id="func-members" name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:aae46d8f8407906b79216f9be88803126" id="r_aae46d8f8407906b79216f9be88803126"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#aae46d8f8407906b79216f9be88803126">evutil_ascii_strcasecmp</a> (const char *str1, const char *str2)</td></tr>
<tr class="memdesc:aae46d8f8407906b79216f9be88803126"><td class="mdescLeft"> </td><td class="mdescRight">As strcasecmp, but always compares the characters in locale-independent ASCII. <br /></td></tr>
<tr class="memitem:a03b44d66883df5bfed32c9ac6df93aac" id="r_a03b44d66883df5bfed32c9ac6df93aac"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a03b44d66883df5bfed32c9ac6df93aac">evutil_ascii_strncasecmp</a> (const char *str1, const char *str2, size_t n)</td></tr>
<tr class="memdesc:a03b44d66883df5bfed32c9ac6df93aac"><td class="mdescLeft"> </td><td class="mdescRight">As strncasecmp, but always compares the characters in locale-independent ASCII. <br /></td></tr>
<tr class="memitem:a5cfa6c13c62d17570a7d5f6d3541ff5b" id="r_a5cfa6c13c62d17570a7d5f6d3541ff5b"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a5cfa6c13c62d17570a7d5f6d3541ff5b">evutil_closesocket</a> (<a class="el" href="#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a> sock)</td></tr>
<tr class="memdesc:a5cfa6c13c62d17570a7d5f6d3541ff5b"><td class="mdescLeft"> </td><td class="mdescRight">Do the platform-specific call needed to close a socket returned from socket() or accept(). <br /></td></tr>
<tr class="memitem:ab486d1e10fd1e3102b4e53beed8d9baa" id="r_ab486d1e10fd1e3102b4e53beed8d9baa"><td class="memItemLeft"><a id="ab486d1e10fd1e3102b4e53beed8d9baa" name="ab486d1e10fd1e3102b4e53beed8d9baa"></a>
EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><b>evutil_configure_monotonic_time</b> (struct <a class="el" href="structevutil__monotonic__timer.html">evutil_monotonic_timer</a> *timer, int flags)</td></tr>
<tr class="memdesc:ab486d1e10fd1e3102b4e53beed8d9baa"><td class="mdescLeft"> </td><td class="mdescRight">Set up a struct <a class="el" href="structevutil__monotonic__timer.html" title="Structure to hold information about a monotonic timer.">evutil_monotonic_timer</a>; flags can include EV_MONOT_PRECISE and EV_MONOT_FALLBACK. <br /></td></tr>
<tr class="memitem:a9d2f7f9996a6ff28db2aeb8ac8a58187" id="r_a9d2f7f9996a6ff28db2aeb8ac8a58187"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a9d2f7f9996a6ff28db2aeb8ac8a58187">evutil_date_rfc1123</a> (char *date, const size_t datelen, const struct tm *tm)</td></tr>
<tr class="memdesc:a9d2f7f9996a6ff28db2aeb8ac8a58187"><td class="mdescLeft"> </td><td class="mdescRight">Format a date string using RFC 1123 format (used in HTTP). <br /></td></tr>
<tr class="memitem:a58a472b3afc5cef1e6b1c9912604381b" id="r_a58a472b3afc5cef1e6b1c9912604381b"><td class="memItemLeft"><a id="a58a472b3afc5cef1e6b1c9912604381b" name="a58a472b3afc5cef1e6b1c9912604381b"></a>
EVENT2_EXPORT_SYMBOL void </td><td class="memItemRight"><b>evutil_freeaddrinfo</b> (struct <a class="el" href="structevutil__addrinfo.html">evutil_addrinfo</a> *ai)</td></tr>
<tr class="memdesc:a58a472b3afc5cef1e6b1c9912604381b"><td class="mdescLeft"> </td><td class="mdescRight">Release storage allocated by evutil_getaddrinfo or evdns_getaddrinfo. <br /></td></tr>
<tr class="memitem:a180a4a3a58127b9aed53e598ab4ede05" id="r_a180a4a3a58127b9aed53e598ab4ede05"><td class="memItemLeft"><a id="a180a4a3a58127b9aed53e598ab4ede05" name="a180a4a3a58127b9aed53e598ab4ede05"></a>
EVENT2_EXPORT_SYMBOL const char * </td><td class="memItemRight"><b>evutil_gai_strerror</b> (int err)</td></tr>
<tr class="memitem:a0f36c2fc48c644a4f56347a25c585cc9" id="r_a0f36c2fc48c644a4f56347a25c585cc9"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a0f36c2fc48c644a4f56347a25c585cc9">evutil_getaddrinfo</a> (const char *nodename, const char *servname, const struct <a class="el" href="structevutil__addrinfo.html">evutil_addrinfo</a> *hints_in, struct <a class="el" href="structevutil__addrinfo.html">evutil_addrinfo</a> **res)</td></tr>
<tr class="memdesc:a0f36c2fc48c644a4f56347a25c585cc9"><td class="mdescLeft"> </td><td class="mdescRight">This function clones getaddrinfo for systems that don't have it. <br /></td></tr>
<tr class="memitem:abe94df86960981b69411f20c0c5235dc" id="r_abe94df86960981b69411f20c0c5235dc"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#abe94df86960981b69411f20c0c5235dc">evutil_gettime_monotonic</a> (struct <a class="el" href="structevutil__monotonic__timer.html">evutil_monotonic_timer</a> *timer, struct timeval *tp)</td></tr>
<tr class="memdesc:abe94df86960981b69411f20c0c5235dc"><td class="mdescLeft"> </td><td class="mdescRight">Query the current monotonic time from a struct <a class="el" href="structevutil__monotonic__timer.html" title="Structure to hold information about a monotonic timer.">evutil_monotonic_timer</a> previously configured with <a class="el" href="#ab486d1e10fd1e3102b4e53beed8d9baa" title="Set up a struct evutil_monotonic_timer; flags can include EV_MONOT_PRECISE and EV_MONOT_FALLBACK.">evutil_configure_monotonic_time()</a>. <br /></td></tr>
<tr class="memitem:a12557f3d4c54dd80fc13f07b28ec20fd" id="r_a12557f3d4c54dd80fc13f07b28ec20fd"><td class="memItemLeft"><a id="a12557f3d4c54dd80fc13f07b28ec20fd" name="a12557f3d4c54dd80fc13f07b28ec20fd"></a>
EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><b>evutil_gettimeofday</b> (struct timeval *tv, struct timezone *tz)</td></tr>
<tr class="memitem:ace56284dd98a6a76112056ac0a2134b8" id="r_ace56284dd98a6a76112056ac0a2134b8"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL const char * </td><td class="memItemRight"><a class="el" href="#ace56284dd98a6a76112056ac0a2134b8">evutil_inet_ntop</a> (int af, const void *src, char *dst, size_t len)</td></tr>
<tr class="memdesc:ace56284dd98a6a76112056ac0a2134b8"><td class="mdescLeft"> </td><td class="mdescRight">Replacement for inet_ntop for platforms which lack it. <br /></td></tr>
<tr class="memitem:a4065af1c9c995010ef7df66154c313b2" id="r_a4065af1c9c995010ef7df66154c313b2"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a4065af1c9c995010ef7df66154c313b2">evutil_inet_pton</a> (int af, const char *src, void *dst)</td></tr>
<tr class="memdesc:a4065af1c9c995010ef7df66154c313b2"><td class="mdescLeft"> </td><td class="mdescRight">Replacement for inet_pton for platforms which lack it. <br /></td></tr>
<tr class="memitem:ad586fc57f596616d810a8b5fe4f8c111" id="r_ad586fc57f596616d810a8b5fe4f8c111"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#ad586fc57f596616d810a8b5fe4f8c111">evutil_inet_pton_scope</a> (int af, const char *src, void *dst, unsigned *indexp)</td></tr>
<tr class="memdesc:ad586fc57f596616d810a8b5fe4f8c111"><td class="mdescLeft"> </td><td class="mdescRight">Variation of inet_pton that also parses IPv6 scopes. <br /></td></tr>
<tr class="memitem:ad361aa5727c88f05633a9032ad8c850f" id="r_ad361aa5727c88f05633a9032ad8c850f"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#ad361aa5727c88f05633a9032ad8c850f">evutil_make_listen_socket_ipv6only</a> (<a class="el" href="#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a> sock)</td></tr>
<tr class="memdesc:ad361aa5727c88f05633a9032ad8c850f"><td class="mdescLeft"> </td><td class="mdescRight">Set ipv6 only bind socket option to make listener work only in ipv6 sockets. <br /></td></tr>
<tr class="memitem:a031699658b52069610d660919d0c2b9d" id="r_a031699658b52069610d660919d0c2b9d"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a031699658b52069610d660919d0c2b9d">evutil_make_listen_socket_not_ipv6only</a> (<a class="el" href="#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a> sock)</td></tr>
<tr class="memdesc:a031699658b52069610d660919d0c2b9d"><td class="mdescLeft"> </td><td class="mdescRight">Set ipv6 only bind socket option to make listener work in both ipv4 and ipv6 sockets. <br /></td></tr>
<tr class="memitem:a7a8e18b7861ed856bde592257f6b6e11" id="r_a7a8e18b7861ed856bde592257f6b6e11"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a7a8e18b7861ed856bde592257f6b6e11">evutil_make_listen_socket_reuseable</a> (<a class="el" href="#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a> sock)</td></tr>
<tr class="memdesc:a7a8e18b7861ed856bde592257f6b6e11"><td class="mdescLeft"> </td><td class="mdescRight">Do platform-specific operations to make a listener socket reusable. <br /></td></tr>
<tr class="memitem:a9e4e68f77ce876ceecc6fb65f2dbe506" id="r_a9e4e68f77ce876ceecc6fb65f2dbe506"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a9e4e68f77ce876ceecc6fb65f2dbe506">evutil_make_listen_socket_reuseable_port</a> (<a class="el" href="#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a> sock)</td></tr>
<tr class="memdesc:a9e4e68f77ce876ceecc6fb65f2dbe506"><td class="mdescLeft"> </td><td class="mdescRight">Do platform-specific operations to make a listener port reusable. <br /></td></tr>
<tr class="memitem:a7edc3874139e863f61edf6c705030430" id="r_a7edc3874139e863f61edf6c705030430"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a7edc3874139e863f61edf6c705030430">evutil_make_socket_closeonexec</a> (<a class="el" href="#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a> sock)</td></tr>
<tr class="memdesc:a7edc3874139e863f61edf6c705030430"><td class="mdescLeft"> </td><td class="mdescRight">Do platform-specific operations as needed to close a socket upon a successful execution of one of the exec*() functions. <br /></td></tr>
<tr class="memitem:a4f8f2384311baf5d7308c7ab079f9b84" id="r_a4f8f2384311baf5d7308c7ab079f9b84"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a4f8f2384311baf5d7308c7ab079f9b84">evutil_make_socket_nonblocking</a> (<a class="el" href="#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a> sock)</td></tr>
<tr class="memdesc:a4f8f2384311baf5d7308c7ab079f9b84"><td class="mdescLeft"> </td><td class="mdescRight">Do platform-specific operations as needed to make a socket nonblocking. <br /></td></tr>
<tr class="memitem:a988b1fc98edeac63efc8b13c4f822a0d" id="r_a988b1fc98edeac63efc8b13c4f822a0d"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a988b1fc98edeac63efc8b13c4f822a0d">evutil_make_tcp_listen_socket_deferred</a> (<a class="el" href="#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a> sock)</td></tr>
<tr class="memdesc:a988b1fc98edeac63efc8b13c4f822a0d"><td class="mdescLeft"> </td><td class="mdescRight">Do platform-specific operations, if possible, to make a tcp listener socket defer accept()s until there is data to read. <br /></td></tr>
<tr class="memitem:a2874062ff988293cd4e40b220933e209" id="r_a2874062ff988293cd4e40b220933e209"><td class="memItemLeft"><a id="a2874062ff988293cd4e40b220933e209" name="a2874062ff988293cd4e40b220933e209"></a>
EVENT2_EXPORT_SYMBOL void </td><td class="memItemRight"><b>evutil_monotonic_timer_free</b> (struct <a class="el" href="structevutil__monotonic__timer.html">evutil_monotonic_timer</a> *timer)</td></tr>
<tr class="memdesc:a2874062ff988293cd4e40b220933e209"><td class="mdescLeft"> </td><td class="mdescRight">Free a struct <a class="el" href="structevutil__monotonic__timer.html" title="Structure to hold information about a monotonic timer.">evutil_monotonic_timer</a> that was allocated using <a class="el" href="#ad9dcfdc37065e801e824a398e9ff26d0" title="Allocate a new struct evutil_monotonic_timer for use with the evutil_configure_monotonic_time() and e...">evutil_monotonic_timer_new()</a>. <br /></td></tr>
<tr class="memitem:ad9dcfdc37065e801e824a398e9ff26d0" id="r_ad9dcfdc37065e801e824a398e9ff26d0"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL struct <a class="el" href="structevutil__monotonic__timer.html">evutil_monotonic_timer</a> * </td><td class="memItemRight"><a class="el" href="#ad9dcfdc37065e801e824a398e9ff26d0">evutil_monotonic_timer_new</a> (void)</td></tr>
<tr class="memdesc:ad9dcfdc37065e801e824a398e9ff26d0"><td class="mdescLeft"> </td><td class="mdescRight">Allocate a new struct <a class="el" href="structevutil__monotonic__timer.html" title="Structure to hold information about a monotonic timer.">evutil_monotonic_timer</a> for use with the <a class="el" href="#ab486d1e10fd1e3102b4e53beed8d9baa" title="Set up a struct evutil_monotonic_timer; flags can include EV_MONOT_PRECISE and EV_MONOT_FALLBACK.">evutil_configure_monotonic_time()</a> and <a class="el" href="#abe94df86960981b69411f20c0c5235dc" title="Query the current monotonic time from a struct evutil_monotonic_timer previously configured with evut...">evutil_gettime_monotonic()</a> functions. <br /></td></tr>
<tr class="memitem:a97d4f315d5c40c4f604f6c9ae694a684" id="r_a97d4f315d5c40c4f604f6c9ae694a684"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a97d4f315d5c40c4f604f6c9ae694a684">evutil_parse_sockaddr_port</a> (const char *str, struct sockaddr *out, int *outlen)</td></tr>
<tr class="memdesc:a97d4f315d5c40c4f604f6c9ae694a684"><td class="mdescLeft"> </td><td class="mdescRight">Parse an IPv4 or IPv6 address, with optional port, from a string. <br /></td></tr>
<tr class="memitem:a3b5b7d22b368ffdd6ed77838bf4fcea6" id="r_a3b5b7d22b368ffdd6ed77838bf4fcea6"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL void </td><td class="memItemRight"><a class="el" href="#a3b5b7d22b368ffdd6ed77838bf4fcea6">evutil_secure_rng_add_bytes</a> (const char *dat, size_t datlen)</td></tr>
<tr class="memdesc:a3b5b7d22b368ffdd6ed77838bf4fcea6"><td class="mdescLeft"> </td><td class="mdescRight">Seed the random number generator with extra random bytes. <br /></td></tr>
<tr class="memitem:a0836ed5d00ccab1957419a07b7acbb56" id="r_a0836ed5d00ccab1957419a07b7acbb56"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL void </td><td class="memItemRight"><a class="el" href="#a0836ed5d00ccab1957419a07b7acbb56">evutil_secure_rng_get_bytes</a> (void *buf, size_t n)</td></tr>
<tr class="memdesc:a0836ed5d00ccab1957419a07b7acbb56"><td class="mdescLeft"> </td><td class="mdescRight">Generate n bytes of secure pseudorandom data, and store them in buf. <br /></td></tr>
<tr class="memitem:a49ffe53dcbe32ad55f1582a0da358ac0" id="r_a49ffe53dcbe32ad55f1582a0da358ac0"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a49ffe53dcbe32ad55f1582a0da358ac0">evutil_secure_rng_init</a> (void)</td></tr>
<tr class="memdesc:a49ffe53dcbe32ad55f1582a0da358ac0"><td class="mdescLeft"> </td><td class="mdescRight">Seed the secure random number generator if needed, and return 0 on success or -1 on failure. <br /></td></tr>
<tr class="memitem:a4544ddceb4e20c8c52985641ca829b7e" id="r_a4544ddceb4e20c8c52985641ca829b7e"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a4544ddceb4e20c8c52985641ca829b7e">evutil_secure_rng_set_urandom_device_file</a> (char *fname)</td></tr>
<tr class="memdesc:a4544ddceb4e20c8c52985641ca829b7e"><td class="mdescLeft"> </td><td class="mdescRight">Set a filename to use in place of /dev/urandom for seeding the secure PRNG. <br /></td></tr>
<tr class="memitem:a96f11bb3a6bf772201a0a2010689a250" id="r_a96f11bb3a6bf772201a0a2010689a250"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a96f11bb3a6bf772201a0a2010689a250">evutil_set_tcp_keepalive</a> (<a class="el" href="#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a> sock, int on, int timeout)</td></tr>
<tr class="memdesc:a96f11bb3a6bf772201a0a2010689a250"><td class="mdescLeft"> </td><td class="mdescRight">Do platform-specific operations to set/unset TCP keep-alive options TCP_KEEPIDLE, TCP_KEEPINTVL and TCP_KEEPCNT on a socket. <br /></td></tr>
<tr class="memitem:a198e8db3626746515792e28b1380be67" id="r_a198e8db3626746515792e28b1380be67"><td class="memItemLeft"><a id="a198e8db3626746515792e28b1380be67" name="a198e8db3626746515792e28b1380be67"></a>
EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><b>evutil_snprintf</b> (char *buf, size_t buflen, const char *format,...)</td></tr>
<tr class="memdesc:a198e8db3626746515792e28b1380be67"><td class="mdescLeft"> </td><td class="mdescRight">Replacement for snprintf to get consistent behavior on platforms for which the return value of snprintf does not conform to C99. <br /></td></tr>
<tr class="memitem:a7b5ad1074f1effe2dbfa18b3f44b589f" id="r_a7b5ad1074f1effe2dbfa18b3f44b589f"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a7b5ad1074f1effe2dbfa18b3f44b589f">evutil_sockaddr_cmp</a> (const struct sockaddr *sa1, const struct sockaddr *sa2, int include_port)</td></tr>
<tr class="memdesc:a7b5ad1074f1effe2dbfa18b3f44b589f"><td class="mdescLeft"> </td><td class="mdescRight">Compare two sockaddrs; return 0 if they are equal, or less than 0 if sa1 precedes sa2, or greater than 0 if sa1 follows sa2. <br /></td></tr>
<tr class="memitem:a050a74274e08eb89a53cb8cb1d617939" id="r_a050a74274e08eb89a53cb8cb1d617939"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><a class="el" href="#a050a74274e08eb89a53cb8cb1d617939">evutil_socketpair</a> (int domain, int type, int protocol, <a class="el" href="#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a> sv[2])</td></tr>
<tr class="memdesc:a050a74274e08eb89a53cb8cb1d617939"><td class="mdescLeft"> </td><td class="mdescRight">Create two new sockets that are connected to each other. <br /></td></tr>
<tr class="memitem:a9175e63729c256eb2646e11e8211f4f7" id="r_a9175e63729c256eb2646e11e8211f4f7"><td class="memItemLeft">EVENT2_EXPORT_SYMBOL ev_int64_t </td><td class="memItemRight"><a class="el" href="#a9175e63729c256eb2646e11e8211f4f7">evutil_strtoll</a> (const char *s, char **endptr, int base)</td></tr>
<tr class="memdesc:a9175e63729c256eb2646e11e8211f4f7"><td class="mdescLeft"> </td><td class="mdescRight">Parse a 64-bit value from a string. <br /></td></tr>
<tr class="memitem:a30bbdc509d150e5dfac1f74dd4e4c212" id="r_a30bbdc509d150e5dfac1f74dd4e4c212"><td class="memItemLeft"><a id="a30bbdc509d150e5dfac1f74dd4e4c212" name="a30bbdc509d150e5dfac1f74dd4e4c212"></a>
EVENT2_EXPORT_SYMBOL int </td><td class="memItemRight"><b>evutil_vsnprintf</b> (char *buf, size_t buflen, const char *format, va_list ap)</td></tr>
<tr class="memdesc:a30bbdc509d150e5dfac1f74dd4e4c212"><td class="mdescLeft"> </td><td class="mdescRight">Replacement for vsnprintf to get consistent behavior on platforms for which the return value of snprintf does not conform to C99. <br /></td></tr>
</table>
<a name="details" id="details"></a><h2 id="header-details" class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Common convenience functions for cross-platform portability and related socket manipulations. </p>
</div><a name="doc-define-members" id="doc-define-members"></a><h2 id="header-doc-define-members" class="groupheader">Macro Definition Documentation</h2>
<a id="aa70c6baf0f9ac418407245579ec2a168" name="aa70c6baf0f9ac418407245579ec2a168"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa70c6baf0f9ac418407245579ec2a168">◆ </a></span>EVUTIL_CLOSESOCKET</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">#define EVUTIL_CLOSESOCKET</td>
<td>(</td>
<td class="paramtype"></td> <td class="paramname"><span class="paramname"><em>s</em></span></td><td>)</td>
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</div><div class="memdoc">
<b>Value:</b><div class="fragment"><div class="line"><a class="code hl_function" href="#a5cfa6c13c62d17570a7d5f6d3541ff5b">evutil_closesocket</a>(s)</div>
<div class="ttc" id="autil_8h_html_a5cfa6c13c62d17570a7d5f6d3541ff5b"><div class="ttname"><a href="#a5cfa6c13c62d17570a7d5f6d3541ff5b">evutil_closesocket</a></div><div class="ttdeci">EVENT2_EXPORT_SYMBOL int evutil_closesocket(evutil_socket_t sock)</div><div class="ttdoc">Do the platform-specific call needed to close a socket returned from socket() or accept().</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a4c296955d33624c18bd4811730caa417">◆ </a></span>evutil_offsetof</h2>
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<td class="memname">#define evutil_offsetof</td>
<td>(</td>
<td class="paramtype"></td> <td class="paramname"><span class="paramname"><em>type</em></span>, </td>
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<td class="paramtype"></td> <td class="paramname"><span class="paramname"><em>field</em></span> )</td>
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<b>Value:</b><div class="fragment"><div class="line">((off_t)(&((type *)0)->field))</div>
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<p>Replacement for offsetof on platforms that don't define it. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ae8b4fae7790599f7b58e8c269f6b29d8">◆ </a></span>EVUTIL_SET_SOCKET_ERROR</h2>
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<td class="memname">#define EVUTIL_SET_SOCKET_ERROR</td>
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<td class="paramtype"></td> <td class="paramname"><span class="paramname"><em>errcode</em></span></td><td>)</td>
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<b>Value:</b><div class="fragment"><div class="line">...</div>
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<p>Replace the most recent socket error with errcode. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a9a94a2e72982e708333486cf72aab941">◆ </a></span>EVUTIL_SOCKET_ERROR</h2>
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<td class="memname">#define EVUTIL_SOCKET_ERROR</td>
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<td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
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<b>Value:</b><div class="fragment"><div class="line">...</div>
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<p>Return the most recent socket error. </p>
<p>Not idempotent on all platforms. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ad5ea5ef81ddcfb299e4867d362ad8654">◆ </a></span>evutil_socket_error_to_string</h2>
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<td class="memname">#define evutil_socket_error_to_string</td>
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<b>Value:</b><div class="fragment"><div class="line">...</div>
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<p>Convert a socket error to a string. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a28f952fb0f16b057d931fd38ee9bdf5e">◆ </a></span>evutil_socket_geterror</h2>
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<td class="memname">#define evutil_socket_geterror</td>
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<b>Value:</b><div class="fragment"><div class="line">...</div>
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<p>Return the most recent socket error to occur on sock. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a7ef0023565082a65020f6e56be59fd0b">◆ </a></span>evutil_socket_t</h2>
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<td class="memname">#define evutil_socket_t   int</td>
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<p>A type wide enough to hold the output of "socket()" or "accept()". </p>
<p>On Windows, this is an intptr_t; elsewhere, it is an int. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a6182f91a8aede88fac748b3f424cbb6d">◆ </a></span>evutil_timeradd</h2>
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<td class="memname">#define evutil_timeradd</td>
<td>(</td>
<td class="paramtype"></td> <td class="paramname"><span class="paramname"><em>tvp</em></span>, </td>
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<td class="paramtype"></td> <td class="paramname"><span class="paramname"><em>uvp</em></span>, </td>
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<td class="paramtype"></td> <td class="paramname"><span class="paramname"><em>vvp</em></span> )</td>
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<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">do</span> { \</div>
<div class="line"> (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \</div>
<div class="line"> (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \</div>
<div class="line"> if ((vvp)->tv_usec >= 1000000) { \</div>
<div class="line"> (vvp)->tv_sec++; \</div>
<div class="line"> (vvp)->tv_usec -= 1000000; \</div>
<div class="line"> } \</div>
<div class="line">} <span class="keywordflow">while</span> (0)</div>
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<h2 class="memtitle"><span class="permalink"><a href="#add4999b82eab8bcb8becc8cb079341a0">◆ </a></span>evutil_timerclear</h2>
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<td class="memname">#define evutil_timerclear</td>
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<b>Value:</b><div class="fragment"><div class="line">(tvp)->tv_sec = (tvp)->tv_usec = 0</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a1a42f43db6aaf6e99736329b6611175d">◆ </a></span>evutil_timercmp</h2>
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<td class="memname">#define evutil_timercmp</td>
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<td class="paramtype"></td> <td class="paramname"><span class="paramname"><em>uvp</em></span>, </td>
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<b>Value:</b><div class="fragment"><div class="line">(((tvp)->tv_sec == (uvp)->tv_sec) ? \</div>
<div class="line"> ((tvp)->tv_usec cmp (uvp)->tv_usec) : \</div>
<div class="line"> ((tvp)->tv_sec cmp (uvp)->tv_sec))</div>
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<p>Return true iff the tvp is related to uvp according to the relational operator cmp. </p>
<p>Recognized values for cmp are ==, <=, <, >=, and >. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a393a0aee6129d132a3dd488366352bf2">◆ </a></span>evutil_timerisset</h2>
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<td class="memname">#define evutil_timerisset</td>
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<b>Value:</b><div class="fragment"><div class="line">((tvp)->tv_sec || (tvp)->tv_usec)</div>
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<h2 class="memtitle"><span class="permalink"><a href="#ab75cdb8eae7b33eac738c46356967399">◆ </a></span>evutil_timersub</h2>
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<td class="memname">#define evutil_timersub</td>
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<td class="paramtype"></td> <td class="paramname"><span class="paramname"><em>uvp</em></span>, </td>
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<td class="paramtype"></td> <td class="paramname"><span class="paramname"><em>vvp</em></span> )</td>
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<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">do</span> { \</div>
<div class="line"> (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \</div>
<div class="line"> (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \</div>
<div class="line"> if ((vvp)->tv_usec < 0) { \</div>
<div class="line"> (vvp)->tv_sec--; \</div>
<div class="line"> (vvp)->tv_usec += 1000000; \</div>
<div class="line"> } \</div>
<div class="line">} <span class="keywordflow">while</span> (0)</div>
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<a name="doc-func-members" id="doc-func-members"></a><h2 id="header-doc-func-members" class="groupheader">Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#aae46d8f8407906b79216f9be88803126">◆ </a></span>evutil_ascii_strcasecmp()</h2>
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<td class="memname">EVENT2_EXPORT_SYMBOL int evutil_ascii_strcasecmp </td>
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<td class="paramtype">const char *</td> <td class="paramname"><span class="paramname"><em>str1</em></span>, </td>
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<p>As strcasecmp, but always compares the characters in locale-independent ASCII. </p>
<p>That's useful if you're handling data in ASCII-based protocols. str1 and str2 must not be NULL. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a03b44d66883df5bfed32c9ac6df93aac">◆ </a></span>evutil_ascii_strncasecmp()</h2>
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<td class="memname">EVENT2_EXPORT_SYMBOL int evutil_ascii_strncasecmp </td>
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<td class="paramtype">const char *</td> <td class="paramname"><span class="paramname"><em>str1</em></span>, </td>
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<p>As strncasecmp, but always compares the characters in locale-independent ASCII. </p>
<p>That's useful if you're handling data in ASCII-based protocols. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a5cfa6c13c62d17570a7d5f6d3541ff5b">◆ </a></span>evutil_closesocket()</h2>
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<td class="memname">EVENT2_EXPORT_SYMBOL int evutil_closesocket </td>
<td>(</td>
<td class="paramtype"><a class="el" href="#a7ef0023565082a65020f6e56be59fd0b">evutil_socket_t</a></td> <td class="paramname"><span class="paramname"><em>sock</em></span></td><td>)</td>
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<p>Do the platform-specific call needed to close a socket returned from socket() or accept(). </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">sock</td><td>The socket to be closed </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>0 on success (whether the operation is supported or not), -1 on failure </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a9d2f7f9996a6ff28db2aeb8ac8a58187">◆ </a></span>evutil_date_rfc1123()</h2>
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<td class="memname">EVENT2_EXPORT_SYMBOL int evutil_date_rfc1123 </td>
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<td class="paramtype">char *</td> <td class="paramname"><span class="paramname"><em>date</em></span>, </td>
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<p>Format a date string using RFC 1123 format (used in HTTP). </p>
<p>If <span class="tt">tm</span> is NULL, current system's time will be used. The number of characters written will be returned. One should check if the return value is smaller than <span class="tt">datelen</span> to check if the result is truncated or not. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a0f36c2fc48c644a4f56347a25c585cc9">◆ </a></span>evutil_getaddrinfo()</h2>
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<td class="memname">EVENT2_EXPORT_SYMBOL int evutil_getaddrinfo </td>
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<td class="paramtype">const char *</td> <td class="paramname"><span class="paramname"><em>servname</em></span>, </td>
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<td class="paramtype">const struct <a class="el" href="structevutil__addrinfo.html">evutil_addrinfo</a> *</td> <td class="paramname"><span class="paramname"><em>hints_in</em></span>, </td>
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<p>This function clones getaddrinfo for systems that don't have it. </p>
<p>For full details, see RFC 3493, section 6.1.</p>
<p>Limitations:</p><ul>
<li>When the system has no getaddrinfo, we fall back to gethostbyname_r or gethostbyname, with their attendant issues.</li>
<li>The AI_V4MAPPED and AI_ALL flags are not currently implemented.</li>
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<p>For a nonblocking variant, see evdns_getaddrinfo. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#abe94df86960981b69411f20c0c5235dc">◆ </a></span>evutil_gettime_monotonic()</h2>
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<td class="memname">EVENT2_EXPORT_SYMBOL int evutil_gettime_monotonic </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structevutil__monotonic__timer.html">evutil_monotonic_timer</a> *</td> <td class="paramname"><span class="paramname"><em>timer</em></span>, </td>
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<td class="paramtype">struct timeval *</td> <td class="paramname"><span class="paramname"><em>tp</em></span> )</td>
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<p>Query the current monotonic time from a struct <a class="el" href="structevutil__monotonic__timer.html" title="Structure to hold information about a monotonic timer.">evutil_monotonic_timer</a> previously configured with <a class="el" href="#ab486d1e10fd1e3102b4e53beed8d9baa" title="Set up a struct evutil_monotonic_timer; flags can include EV_MONOT_PRECISE and EV_MONOT_FALLBACK.">evutil_configure_monotonic_time()</a>. </p>
<p>Monotonic time is guaranteed never to run in reverse, but is not necessarily epoch- based, or relative to any other definite point. Use it to make reliable measurements of elapsed time between events even when the system time may be changed.</p>
<p>It is not safe to use this function on the same timer from multiple threads. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ace56284dd98a6a76112056ac0a2134b8">◆ </a></span>evutil_inet_ntop()</h2>
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<td class="memname">EVENT2_EXPORT_SYMBOL const char * evutil_inet_ntop </td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>af</em></span>, </td>
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<td class="paramtype">const void *</td> <td class="paramname"><span class="paramname"><em>src</em></span>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">char *</td> <td class="paramname"><span class="paramname"><em>dst</em></span>, </td>
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<td class="paramtype">size_t</td> <td class="paramname"><span class="paramname"><em>len</em></span> )</td>
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<p>Replacement for inet_ntop for platforms which lack it. </p>
<p>src must not be NULL. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a4065af1c9c995010ef7df66154c313b2">◆ </a></span>evutil_inet_pton()</h2>
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<td class="memname">EVENT2_EXPORT_SYMBOL int evutil_inet_pton </td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>af</em></span>, </td>
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<td></td>
<td class="paramtype">const char *</td> <td class="paramname"><span class="paramname"><em>src</em></span>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">void *</td> <td class="paramname"><span class="paramname"><em>dst</em></span> )</td>
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<p>Replacement for inet_pton for platforms which lack it. </p>
<p>src must not be NULL. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ad586fc57f596616d810a8b5fe4f8c111">◆ </a></span>evutil_inet_pton_scope()</h2>
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<td class="memname">EVENT2_EXPORT_SYMBOL int evutil_inet_pton_scope </td>
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<p>Variation of inet_pton that also parses IPv6 scopes. </p>
<p>Public for unit tests. No reason to call this directly. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ad361aa5727c88f05633a9032ad8c850f">◆ </a></span>evutil_make_listen_socket_ipv6only()</h2>
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<td class="memname">EVENT2_EXPORT_SYMBOL int evutil_make_listen_socket_ipv6only </td>
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<p>Set ipv6 only bind socket option to make listener work only in ipv6 sockets. </p>
<p>According to RFC3493 and most Linux distributions, default value for the sockets is to work in IPv4-mapped mode. In IPv4-mapped mode, it is not possible to bind same port from different IPv4 and IPv6 handlers.</p>
<p>On Windows the default value is instead to only work in IPv6 mode.</p>
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<tr><td class="paramname">sock</td><td>The socket to make in ipv6only working mode </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>0 on success, -1 on failure </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a031699658b52069610d660919d0c2b9d">◆ </a></span>evutil_make_listen_socket_not_ipv6only()</h2>
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<td class="memname">EVENT2_EXPORT_SYMBOL int evutil_make_listen_socket_not_ipv6only </td>
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<p>Set ipv6 only bind socket option to make listener work in both ipv4 and ipv6 sockets. </p>
<p>According to RFC3493 and most Linux distributions, default value for the sockets is to work in IPv4-mapped mode. In IPv4-mapped mode, it is not possible to bind same port from different IPv4 and IPv6 handlers.</p>
<p>On Windows the default value is instead to only work in IPv6 mode.</p>
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<tr><td class="paramname">sock</td><td>The socket to make in ipv6only working mode </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>0 on success, -1 on failure </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a7a8e18b7861ed856bde592257f6b6e11">◆ </a></span>evutil_make_listen_socket_reuseable()</h2>
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<td class="memname">EVENT2_EXPORT_SYMBOL int evutil_make_listen_socket_reuseable </td>
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<p>Do platform-specific operations to make a listener socket reusable. </p>
<p>Specifically, we want to make sure that another program will be able to bind this address right after we've closed the listener.</p>
<p>This differs from Windows's interpretation of "reusable", which allows multiple listeners to bind the same address at the same time.</p>
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<tr><td class="paramname">sock</td><td>The socket to make reusable </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>0 on success, -1 on failure </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a9e4e68f77ce876ceecc6fb65f2dbe506">◆ </a></span>evutil_make_listen_socket_reuseable_port()</h2>
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<td class="memname">EVENT2_EXPORT_SYMBOL int evutil_make_listen_socket_reuseable_port </td>
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<p>Do platform-specific operations to make a listener port reusable. </p>
<p>Specifically, we want to make sure that multiple programs that also set the same socket option will be able to bind, and listen at the same time, for incoming connections/datagrams to be distributed evenly across all of the threads (or processes).</p>
<p>This feature is available only on Linux 3.9+, DragonFlyBSD 3.6+, FreeBSD 12.0+, Solaris 11.4, AIX 7.2.5 for now.</p>
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<tr><td class="paramname">sock</td><td>The socket to make reusable </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>0 on success, -1 on failure </dd></dl>
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