1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>ip::basic_resolver::resolve (10 of 12 overloads)</title> 5<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../../../boost_asio.html" title="Boost.Asio"> 8<link rel="up" href="../resolve.html" title="ip::basic_resolver::resolve"> 9<link rel="prev" href="overload9.html" title="ip::basic_resolver::resolve (9 of 12 overloads)"> 10<link rel="next" href="overload11.html" title="ip::basic_resolver::resolve (11 of 12 overloads)"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr> 14<td valign="top"><img alt="Boost C++ Libraries" width="277" height="86" src="../../../../../../boost.png"></td> 15<td align="center"><a href="../../../../../../index.html">Home</a></td> 16<td align="center"><a href="../../../../../../libs/libraries.htm">Libraries</a></td> 17<td align="center"><a href="http://www.boost.org/users/people.html">People</a></td> 18<td align="center"><a href="http://www.boost.org/users/faq.html">FAQ</a></td> 19<td align="center"><a href="../../../../../../more/index.htm">More</a></td> 20</tr></table> 21<hr> 22<div class="spirit-nav"> 23<a accesskey="p" href="overload9.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../resolve.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../boost_asio.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="overload11.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 24</div> 25<div class="section"> 26<div class="titlepage"><div><div><h5 class="title"> 27<a name="boost_asio.reference.ip__basic_resolver.resolve.overload10"></a><a class="link" href="overload10.html" title="ip::basic_resolver::resolve (10 of 12 overloads)">ip::basic_resolver::resolve 28 (10 of 12 overloads)</a> 29</h5></div></div></div> 30<p> 31 Perform forward resolution of a query to a list of entries. 32 </p> 33<pre class="programlisting">results_type resolve( 34 const protocol_type & protocol, 35 string_view host, 36 string_view service, 37 resolver_base::flags resolve_flags, 38 boost::system::error_code & ec); 39</pre> 40<p> 41 This function is used to resolve host and service names into a list of 42 endpoint entries. 43 </p> 44<h6> 45<a name="boost_asio.reference.ip__basic_resolver.resolve.overload10.h0"></a> 46 <span class="phrase"><a name="boost_asio.reference.ip__basic_resolver.resolve.overload10.parameters"></a></span><a class="link" href="overload10.html#boost_asio.reference.ip__basic_resolver.resolve.overload10.parameters">Parameters</a> 47 </h6> 48<div class="variablelist"> 49<p class="title"><b></b></p> 50<dl class="variablelist"> 51<dt><span class="term">protocol</span></dt> 52<dd><p> 53 A protocol object, normally representing either the IPv4 or IPv6 54 version of an internet protocol. 55 </p></dd> 56<dt><span class="term">host</span></dt> 57<dd><p> 58 A string identifying a location. May be a descriptive name or a 59 numeric address string. If an empty string and the passive flag 60 has been specified, the resolved endpoints are suitable for local 61 service binding. If an empty string and passive is not specified, 62 the resolved endpoints will use the loopback address. 63 </p></dd> 64<dt><span class="term">service</span></dt> 65<dd><p> 66 A string identifying the requested service. This may be a descriptive 67 name or a numeric string corresponding to a port number. May be 68 an empty string, in which case all resolved endpoints will have 69 a port number of 0. 70 </p></dd> 71<dt><span class="term">resolve_flags</span></dt> 72<dd><p> 73 A set of flags that determine how name resolution should be performed. 74 The default flags are suitable for communication with remote hosts. 75 See the <a class="link" href="../../ip__resolver_base.html" title="ip::resolver_base"><code class="computeroutput">ip::resolver_base</code></a> 76 documentation for the set of available flags. 77 </p></dd> 78<dt><span class="term">ec</span></dt> 79<dd><p> 80 Set to indicate what error occurred, if any. 81 </p></dd> 82</dl> 83</div> 84<h6> 85<a name="boost_asio.reference.ip__basic_resolver.resolve.overload10.h1"></a> 86 <span class="phrase"><a name="boost_asio.reference.ip__basic_resolver.resolve.overload10.return_value"></a></span><a class="link" href="overload10.html#boost_asio.reference.ip__basic_resolver.resolve.overload10.return_value">Return 87 Value</a> 88 </h6> 89<p> 90 A range object representing the list of endpoint entries. An empty range 91 is returned if an error occurs. A successful call to this function is 92 guaranteed to return a non-empty range. 93 </p> 94<h6> 95<a name="boost_asio.reference.ip__basic_resolver.resolve.overload10.h2"></a> 96 <span class="phrase"><a name="boost_asio.reference.ip__basic_resolver.resolve.overload10.remarks"></a></span><a class="link" href="overload10.html#boost_asio.reference.ip__basic_resolver.resolve.overload10.remarks">Remarks</a> 97 </h6> 98<p> 99 On POSIX systems, host names may be locally defined in the file <code class="computeroutput">/etc/hosts</code>. 100 On Windows, host names may be defined in the file <code class="computeroutput">c:\windows\system32\drivers\etc\hosts</code>. 101 Remote host name resolution is performed using DNS. Operating systems 102 may use additional locations when resolving host names (such as NETBIOS 103 names on Windows). 104 </p> 105<p> 106 On POSIX systems, service names are typically defined in the file <code class="computeroutput">/etc/services</code>. 107 On Windows, service names may be found in the file <code class="computeroutput">c:\windows\system32\drivers\etc\services</code>. 108 Operating systems may use additional locations when resolving service 109 names. 110 </p> 111</div> 112<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 113<td align="left"></td> 114<td align="right"><div class="copyright-footer">Copyright © 2003-2020 Christopher M. 115 Kohlhoff<p> 116 Distributed under the Boost Software License, Version 1.0. (See accompanying 117 file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 118 </p> 119</div></td> 120</tr></table> 121<hr> 122<div class="spirit-nav"> 123<a accesskey="p" href="overload9.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../resolve.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../../../boost_asio.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="overload11.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 124</div> 125</body> 126</html> 127
