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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>GSocketConnectable: GIO Reference Manual</title> <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> <link rel="home" href="index.html" title="GIO Reference Manual"> <link rel="up" href="resolver.html" title="DNS resolution"> <link rel="prev" href="GSimpleProxyResolver.html" title="GSimpleProxyResolver"> <link rel="next" href="GSocketAddressEnumerator.html" title="GSocketAddressEnumerator"> <meta name="generator" content="GTK-Doc V1.32 (XML mode)"> <link rel="stylesheet" href="style.css" type="text/css"> </head> <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> <td width="100%" align="left" class="shortcuts"> <a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> <a href="#GSocketConnectable.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span> <a href="#GSocketConnectable.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_prerequisites"> <span class="dim">|</span> <a href="#GSocketConnectable.prerequisites" class="shortcut">Prerequisites</a></span><span id="nav_implementations"> <span class="dim">|</span> <a href="#GSocketConnectable.implementations" class="shortcut">Known Implementations</a></span> </td> <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> <td><a accesskey="u" href="resolver.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> <td><a accesskey="p" href="GSimpleProxyResolver.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> <td><a accesskey="n" href="GSocketAddressEnumerator.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> </tr></table> <div class="refentry"> <a name="GSocketConnectable"></a><div class="titlepage"></div> <div class="refnamediv"><table width="100%"><tr> <td valign="top"> <h2><span class="refentrytitle"><a name="GSocketConnectable.top_of_page"></a>GSocketConnectable</span></h2> <p>GSocketConnectable — Interface for potential socket endpoints</p> </td> <td class="gallery_image" valign="top" align="right"></td> </tr></table></div> <div class="refsect1"> <a name="GSocketConnectable.functions"></a><h2>Functions</h2> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="functions_proto_type"> <col class="functions_proto_name"> </colgroup> <tbody> <tr> <td class="function_type"> <a class="link" href="GSocketAddressEnumerator.html" title="GSocketAddressEnumerator"><span class="returnvalue">GSocketAddressEnumerator</span></a> * </td> <td class="function_name"> <a class="link" href="GSocketConnectable.html#g-socket-connectable-enumerate" title="g_socket_connectable_enumerate ()">g_socket_connectable_enumerate</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <a class="link" href="GSocketAddressEnumerator.html" title="GSocketAddressEnumerator"><span class="returnvalue">GSocketAddressEnumerator</span></a> * </td> <td class="function_name"> <a class="link" href="GSocketConnectable.html#g-socket-connectable-proxy-enumerate" title="g_socket_connectable_proxy_enumerate ()">g_socket_connectable_proxy_enumerate</a> <span class="c_punctuation">()</span> </td> </tr> <tr> <td class="function_type"> <span class="returnvalue">gchar</span> * </td> <td class="function_name"> <a class="link" href="GSocketConnectable.html#g-socket-connectable-to-string" title="g_socket_connectable_to_string ()">g_socket_connectable_to_string</a> <span class="c_punctuation">()</span> </td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="GSocketConnectable.other"></a><h2>Types and Values</h2> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="other_proto_type"> <col class="other_proto_name"> </colgroup> <tbody> <tr> <td class="datatype_keyword"> </td> <td class="function_name"><a class="link" href="GSocketConnectable.html#GSocketConnectable-struct" title="GSocketConnectable">GSocketConnectable</a></td> </tr> <tr> <td class="datatype_keyword">struct</td> <td class="function_name"><a class="link" href="GSocketConnectable.html#GSocketConnectableIface" title="struct GSocketConnectableIface">GSocketConnectableIface</a></td> </tr> </tbody> </table></div> </div> <div class="refsect1"> <a name="GSocketConnectable.object-hierarchy"></a><h2>Object Hierarchy</h2> <pre class="screen"> GInterface <span class="lineart">╰──</span> GSocketConnectable </pre> </div> <div class="refsect1"> <a name="GSocketConnectable.prerequisites"></a><h2>Prerequisites</h2> <p> GSocketConnectable requires GObject.</p> </div> <div class="refsect1"> <a name="GSocketConnectable.implementations"></a><h2>Known Implementations</h2> <p> GSocketConnectable is implemented by <a class="link" href="GInetSocketAddress.html" title="GInetSocketAddress">GInetSocketAddress</a>, <a class="link" href="GNativeSocketAddress.html" title="GNativeSocketAddress">GNativeSocketAddress</a>, <a class="link" href="GNetworkAddress.html" title="GNetworkAddress">GNetworkAddress</a>, <a class="link" href="GNetworkService.html" title="GNetworkService">GNetworkService</a>, <a class="link" href="GProxyAddress.html" title="GProxyAddress">GProxyAddress</a>, <a class="link" href="GSocketAddress.html" title="GSocketAddress">GSocketAddress</a> and <a class="link" href="GUnixSocketAddress.html" title="GUnixSocketAddress">GUnixSocketAddress</a>.</p> </div> <div class="refsect1"> <a name="GSocketConnectable.includes"></a><h2>Includes</h2> <pre class="synopsis">#include <gio/gio.h> </pre> </div> <div class="refsect1"> <a name="GSocketConnectable.description"></a><h2>Description</h2> <p>Objects that describe one or more potential socket endpoints implement <a class="link" href="GSocketConnectable.html" title="GSocketConnectable"><span class="type">GSocketConnectable</span></a>. Callers can then use <a class="link" href="GSocketConnectable.html#g-socket-connectable-enumerate" title="g_socket_connectable_enumerate ()"><code class="function">g_socket_connectable_enumerate()</code></a> to get a <a class="link" href="GSocketAddressEnumerator.html" title="GSocketAddressEnumerator"><span class="type">GSocketAddressEnumerator</span></a> to try out each socket address in turn until one succeeds, as shown in the sample code below.</p> <div class="informalexample"> <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> <tbody> <tr> <td class="listing_lines" align="right"><pre>1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49</pre></td> <td class="listing_code"><pre class="programlisting"><span class="n">MyConnectionType</span> <span class="o">*</span> <span class="nf">connect_to_host</span> <span class="p">(</span><span class="k">const</span> <span class="kt">char</span> <span class="o">*</span><span class="n">hostname</span><span class="p">,</span> <span class="n">guint16</span> <span class="n">port</span><span class="p">,</span> <span class="n">GCancellable</span> <span class="o">*</span><span class="n">cancellable</span><span class="p">,</span> <span class="n">GError</span> <span class="o">**</span><span class="n">error</span><span class="p">)</span> <span class="p">{</span> <span class="n">MyConnection</span> <span class="o">*</span><span class="n">conn</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span> <span class="n">GSocketConnectable</span> <span class="o">*</span><span class="n">addr</span><span class="p">;</span> <span class="n">GSocketAddressEnumerator</span> <span class="o">*</span><span class="n">enumerator</span><span class="p">;</span> <span class="n">GSocketAddress</span> <span class="o">*</span><span class="n">sockaddr</span><span class="p">;</span> <span class="n">GError</span> <span class="o">*</span><span class="n">conn_error</span> <span class="o">=</span> <span class="nb">NULL</span><span class="p">;</span> <span class="n">addr</span> <span class="o">=</span> <span class="n">g_network_address_new</span> <span class="p">(</span><span class="n">hostname</span><span class="p">,</span> <span class="n">port</span><span class="p">);</span> <span class="n">enumerator</span> <span class="o">=</span> <span class="n">g_socket_connectable_enumerate</span> <span class="p">(</span><span class="n">addr</span><span class="p">);</span> <span class="n">g_object_unref</span> <span class="p">(</span><span class="n">addr</span><span class="p">);</span> <span class="c1">// Try each sockaddr until we succeed. Record the first connection error,</span> <span class="c1">// but not any further ones (since they'll probably be basically the same</span> <span class="c1">// as the first).</span> <span class="k">while</span> <span class="p">(</span><span class="o">!</span><span class="n">conn</span> <span class="o">&&</span> <span class="p">(</span><span class="n">sockaddr</span> <span class="o">=</span> <span class="n">g_socket_address_enumerator_next</span> <span class="p">(</span><span class="n">enumerator</span><span class="p">,</span> <span class="n">cancellable</span><span class="p">,</span> <span class="n">error</span><span class="p">))</span> <span class="p">{</span> <span class="n">conn</span> <span class="o">=</span> <span class="n">connect_to_sockaddr</span> <span class="p">(</span><span class="n">sockaddr</span><span class="p">,</span> <span class="n">conn_error</span> <span class="o">?</span> <span class="nb">NULL</span> <span class="o">:</span> <span class="o">&</span><span class="n">conn_error</span><span class="p">);</span> <span class="n">g_object_unref</span> <span class="p">(</span><span class="n">sockaddr</span><span class="p">);</span> <span class="p">}</span> <span class="n">g_object_unref</span> <span class="p">(</span><span class="n">enumerator</span><span class="p">);</span> <span class="k">if</span> <span class="p">(</span><span class="n">conn</span><span class="p">)</span> <span class="p">{</span> <span class="k">if</span> <span class="p">(</span><span class="n">conn_error</span><span class="p">)</span> <span class="p">{</span> <span class="c1">// We couldn't connect to the first address, but we succeeded</span> <span class="c1">// in connecting to a later address.</span> <span class="n">g_error_free</span> <span class="p">(</span><span class="n">conn_error</span><span class="p">);</span> <span class="p">}</span> <span class="k">return</span> <span class="n">conn</span><span class="p">;</span> <span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="n">error</span><span class="p">)</span> <span class="p">{</span> <span class="c1">/// Either initial lookup failed, or else the caller cancelled us.</span> <span class="k">if</span> <span class="p">(</span><span class="n">conn_error</span><span class="p">)</span> <span class="n">g_error_free</span> <span class="p">(</span><span class="n">conn_error</span><span class="p">);</span> <span class="k">return</span> <span class="nb">NULL</span><span class="p">;</span> <span class="p">}</span> <span class="k">else</span> <span class="p">{</span> <span class="n">g_error_propagate</span> <span class="p">(</span><span class="n">error</span><span class="p">,</span> <span class="n">conn_error</span><span class="p">);</span> <span class="k">return</span> <span class="nb">NULL</span><span class="p">;</span> <span class="p">}</span> <span class="p">}</span></pre></td> </tr> </tbody> </table> </div> <p></p> </div> <div class="refsect1"> <a name="GSocketConnectable.functions_details"></a><h2>Functions</h2> <div class="refsect2"> <a name="g-socket-connectable-enumerate"></a><h3>g_socket_connectable_enumerate ()</h3> <pre class="programlisting"><a class="link" href="GSocketAddressEnumerator.html" title="GSocketAddressEnumerator"><span class="returnvalue">GSocketAddressEnumerator</span></a> * g_socket_connectable_enumerate (<em class="parameter"><code><a class="link" href="GSocketConnectable.html" title="GSocketConnectable"><span class="type">GSocketConnectable</span></a> *connectable</code></em>);</pre> <p>Creates a <a class="link" href="GSocketAddressEnumerator.html" title="GSocketAddressEnumerator"><span class="type">GSocketAddressEnumerator</span></a> for <em class="parameter"><code>connectable</code></em> .</p> <div class="refsect3"> <a name="g-socket-connectable-enumerate.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>connectable</p></td> <td class="parameter_description"><p>a <a class="link" href="GSocketConnectable.html" title="GSocketConnectable"><span class="type">GSocketConnectable</span></a></p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="g-socket-connectable-enumerate.returns"></a><h4>Returns</h4> <p>a new <a class="link" href="GSocketAddressEnumerator.html" title="GSocketAddressEnumerator"><span class="type">GSocketAddressEnumerator</span></a>. </p> <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> </div> <p class="since">Since: <a class="link" href="api-index-2-22.html#api-index-2.22">2.22</a></p> </div> <hr> <div class="refsect2"> <a name="g-socket-connectable-proxy-enumerate"></a><h3>g_socket_connectable_proxy_enumerate ()</h3> <pre class="programlisting"><a class="link" href="GSocketAddressEnumerator.html" title="GSocketAddressEnumerator"><span class="returnvalue">GSocketAddressEnumerator</span></a> * g_socket_connectable_proxy_enumerate (<em class="parameter"><code><a class="link" href="GSocketConnectable.html" title="GSocketConnectable"><span class="type">GSocketConnectable</span></a> *connectable</code></em>);</pre> <p>Creates a <a class="link" href="GSocketAddressEnumerator.html" title="GSocketAddressEnumerator"><span class="type">GSocketAddressEnumerator</span></a> for <em class="parameter"><code>connectable</code></em> that will return a <a class="link" href="GProxyAddress.html" title="GProxyAddress"><span class="type">GProxyAddress</span></a> for each of its addresses that you must connect to via a proxy.</p> <p>If <em class="parameter"><code>connectable</code></em> does not implement <a class="link" href="GSocketConnectable.html#g-socket-connectable-proxy-enumerate" title="g_socket_connectable_proxy_enumerate ()"><code class="function">g_socket_connectable_proxy_enumerate()</code></a>, this will fall back to calling <a class="link" href="GSocketConnectable.html#g-socket-connectable-enumerate" title="g_socket_connectable_enumerate ()"><code class="function">g_socket_connectable_enumerate()</code></a>.</p> <div class="refsect3"> <a name="g-socket-connectable-proxy-enumerate.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>connectable</p></td> <td class="parameter_description"><p>a <a class="link" href="GSocketConnectable.html" title="GSocketConnectable"><span class="type">GSocketConnectable</span></a></p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="g-socket-connectable-proxy-enumerate.returns"></a><h4>Returns</h4> <p>a new <a class="link" href="GSocketAddressEnumerator.html" title="GSocketAddressEnumerator"><span class="type">GSocketAddressEnumerator</span></a>. </p> <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> </div> <p class="since">Since: <a class="link" href="api-index-2-26.html#api-index-2.26">2.26</a></p> </div> <hr> <div class="refsect2"> <a name="g-socket-connectable-to-string"></a><h3>g_socket_connectable_to_string ()</h3> <pre class="programlisting"><span class="returnvalue">gchar</span> * g_socket_connectable_to_string (<em class="parameter"><code><a class="link" href="GSocketConnectable.html" title="GSocketConnectable"><span class="type">GSocketConnectable</span></a> *connectable</code></em>);</pre> <p>Format a <a class="link" href="GSocketConnectable.html" title="GSocketConnectable"><span class="type">GSocketConnectable</span></a> as a string. This is a human-readable format for use in debugging output, and is not a stable serialization format. It is not suitable for use in user interfaces as it exposes too much information for a user.</p> <p>If the <a class="link" href="GSocketConnectable.html" title="GSocketConnectable"><span class="type">GSocketConnectable</span></a> implementation does not support string formatting, the implementation’s type name will be returned as a fallback.</p> <div class="refsect3"> <a name="g-socket-connectable-to-string.parameters"></a><h4>Parameters</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="150px" class="parameters_name"> <col class="parameters_description"> <col width="200px" class="parameters_annotations"> </colgroup> <tbody><tr> <td class="parameter_name"><p>connectable</p></td> <td class="parameter_description"><p>a <a class="link" href="GSocketConnectable.html" title="GSocketConnectable"><span class="type">GSocketConnectable</span></a></p></td> <td class="parameter_annotations"> </td> </tr></tbody> </table></div> </div> <div class="refsect3"> <a name="g-socket-connectable-to-string.returns"></a><h4>Returns</h4> <p>the formatted string. </p> <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p> </div> <p class="since">Since: <a class="link" href="api-index-2-48.html#api-index-2.48">2.48</a></p> </div> </div> <div class="refsect1"> <a name="GSocketConnectable.other_details"></a><h2>Types and Values</h2> <div class="refsect2"> <a name="GSocketConnectable-struct"></a><h3>GSocketConnectable</h3> <pre class="programlisting">typedef struct _GSocketConnectable GSocketConnectable;</pre> <p>Interface for objects that contain or generate a <a class="link" href="GSocketAddress.html" title="GSocketAddress"><span class="type">GSocketAddress</span></a>.</p> </div> <hr> <div class="refsect2"> <a name="GSocketConnectableIface"></a><h3>struct GSocketConnectableIface</h3> <pre class="programlisting">struct GSocketConnectableIface { GTypeInterface g_iface; /* Virtual Table */ GSocketAddressEnumerator * (* enumerate) (GSocketConnectable *connectable); GSocketAddressEnumerator * (* proxy_enumerate) (GSocketConnectable *connectable); gchar * (* to_string) (GSocketConnectable *connectable); }; </pre> <p>Provides an interface for returning a <a class="link" href="GSocketAddressEnumerator.html" title="GSocketAddressEnumerator"><span class="type">GSocketAddressEnumerator</span></a> and <a class="link" href="GProxyAddressEnumerator.html" title="GProxyAddressEnumerator"><span class="type">GProxyAddressEnumerator</span></a></p> <div class="refsect3"> <a name="GSocketConnectableIface.members"></a><h4>Members</h4> <div class="informaltable"><table class="informaltable" width="100%" border="0"> <colgroup> <col width="300px" class="struct_members_name"> <col class="struct_members_description"> <col width="200px" class="struct_members_annotations"> </colgroup> <tbody> <tr> <td class="struct_member_name"><p><em class="structfield"><code><a name="GSocketConnectableIface.enumerate"></a>enumerate</code></em> ()</p></td> <td class="struct_member_description"><p>Creates a <a class="link" href="GSocketAddressEnumerator.html" title="GSocketAddressEnumerator"><span class="type">GSocketAddressEnumerator</span></a></p></td> <td class="struct_member_annotations"> </td> </tr> <tr> <td class="struct_member_name"><p><em class="structfield"><code><a name="GSocketConnectableIface.proxy-enumerate"></a>proxy_enumerate</code></em> ()</p></td> <td class="struct_member_description"><p>Creates a <a class="link" href="GProxyAddressEnumerator.html" title="GProxyAddressEnumerator"><span class="type">GProxyAddressEnumerator</span></a></p></td> <td class="struct_member_annotations"> </td> </tr> <tr> <td class="struct_member_name"><p><em class="structfield"><code><a name="GSocketConnectableIface.to-string"></a>to_string</code></em> ()</p></td> <td class="struct_member_description"><p>Format the connectable’s address as a string for debugging. Implementing this is optional. (Since: 2.48)</p></td> <td class="struct_member_annotations"> </td> </tr> </tbody> </table></div> </div> </div> </div> </div> <div class="footer"> <hr>Generated by GTK-Doc V1.32</div> </body> </html>