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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.socket-getsockname" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>socket_getsockname</refname>
<refpurpose>Queries the local side of the given socket which may either result in host/port or in a Unix filesystem path, dependent on its type</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>socket_getsockname</methodname>
<methodparam><type>Socket</type><parameter>socket</parameter></methodparam>
<methodparam><type>string</type><parameter role="reference">address</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter role="reference">port</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<note>
<simpara>
<function>socket_getsockname</function> should not be used with
<constant>AF_UNIX</constant> sockets created with <function>socket_connect</function>.
Only sockets created with <function>socket_accept</function> or a primary
server socket following a call to <function>socket_bind</function> will return
meaningful values.
</simpara>
</note>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>socket</parameter></term>
<listitem>
<para>
A <classname>Socket</classname> instance created with <function>socket_create</function>
or <function>socket_accept</function>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>address</parameter></term>
<listitem>
<para>
If the given socket is of type <constant>AF_INET</constant>
or <constant>AF_INET6</constant>, <function>socket_getsockname</function>
will return the local <emphasis>IP address</emphasis> in appropriate notation (e.g.
<literal>127.0.0.1</literal> or <literal>fe80::1</literal>) in the
<parameter>address</parameter> parameter and, if the optional
<parameter>port</parameter> parameter is present, also the associated port.
</para>
<para>
If the given socket is of type <constant>AF_UNIX</constant>,
<function>socket_getsockname</function> will return the Unix filesystem
path (e.g. <literal>/var/run/daemon.sock</literal>) in the
<parameter>address</parameter> parameter.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>port</parameter></term>
<listitem>
<para>
If provided, this will hold the associated port.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.success; <function>socket_getsockname</function> may also return
&false; if the socket type is not any of <constant>AF_INET</constant>,
<constant>AF_INET6</constant>, or <constant>AF_UNIX</constant>, in which
case the last socket error code is <emphasis>not</emphasis> updated.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
&sockets.changelog.socket-param;
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>socket_getpeername</function></member>
<member><function>socket_last_error</function></member>
<member><function>socket_strerror</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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