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<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>
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<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_return">
<col class="functions_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">
<a href="../glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</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="name">
<col class="description">
</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
 <a href="../gobject-The-Base-Object-Type.html#GObject-struct">GObject</a>.</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="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 &lt;gio/gio.h&gt;
</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
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49</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="normal">MyConnectionType </span><span class="symbol">*</span>
<span class="function">connect_to_host</span><span class="normal"> </span><span class="symbol">(</span><span class="keyword">const</span><span class="normal"> </span><span class="type">char</span><span class="normal">    </span><span class="symbol">*</span><span class="normal">hostname</span><span class="symbol">,</span>
<span class="normal">                 </span><span class="usertype">guint16</span><span class="normal">        port</span><span class="symbol">,</span>
<span class="normal">                 </span><span class="usertype">GCancellable</span><span class="normal">  </span><span class="symbol">*</span><span class="normal">cancellable</span><span class="symbol">,</span>
<span class="normal">                 </span><span class="usertype">GError</span><span class="normal">       </span><span class="symbol">**</span><span class="normal">error</span><span class="symbol">)</span>
<span class="cbracket">{</span>
<span class="normal">  </span><span class="usertype">MyConnection</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">conn </span><span class="symbol">=</span><span class="normal"> <a href="../glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">;</span>
<span class="normal">  </span><span class="usertype">GSocketConnectable</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">addr</span><span class="symbol">;</span>
<span class="normal">  </span><span class="usertype">GSocketAddressEnumerator</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">enumerator</span><span class="symbol">;</span>
<span class="normal">  </span><span class="usertype">GSocketAddress</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">sockaddr</span><span class="symbol">;</span>
<span class="normal">  </span><span class="usertype">GError</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">conn_error </span><span class="symbol">=</span><span class="normal"> <a href="../glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">;</span>

<span class="normal">  addr </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GNetworkAddress.html#g-network-address-new">g_network_address_new</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">hostname</span><span class="symbol">,</span><span class="normal"> port</span><span class="symbol">);</span>
<span class="normal">  enumerator </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GSocketConnectable.html#g-socket-connectable-enumerate">g_socket_connectable_enumerate</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">addr</span><span class="symbol">);</span>
<span class="normal">  </span><span class="function"><a href="../gobject-The-Base-Object-Type.html#g-object-unref">g_object_unref</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">addr</span><span class="symbol">);</span>

<span class="normal">  </span><span class="comment">// Try each sockaddr until we succeed. Record the first connection error,</span>
<span class="normal">  </span><span class="comment">// but not any further ones (since they'll probably be basically the same</span>
<span class="normal">  </span><span class="comment">// as the first).</span>
<span class="normal">  </span><span class="keyword">while</span><span class="normal"> </span><span class="symbol">(!</span><span class="normal">conn </span><span class="symbol">&amp;&amp;</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">sockaddr </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GSocketAddressEnumerator.html#g-socket-address-enumerator-next">g_socket_address_enumerator_next</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">enumerator</span><span class="symbol">,</span><span class="normal"> cancellable</span><span class="symbol">,</span><span class="normal"> error</span><span class="symbol">))</span>
<span class="normal">    </span><span class="cbracket">{</span>
<span class="normal">      conn </span><span class="symbol">=</span><span class="normal"> </span><span class="function">connect_to_sockaddr</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">sockaddr</span><span class="symbol">,</span><span class="normal"> conn_error </span><span class="symbol">?</span><span class="normal"> <a href="../glib-Standard-Macros.html#NULL:CAPS">NULL</a> </span><span class="symbol">:</span><span class="normal"> </span><span class="symbol">&amp;</span><span class="normal">conn_error</span><span class="symbol">);</span>
<span class="normal">      </span><span class="function"><a href="../gobject-The-Base-Object-Type.html#g-object-unref">g_object_unref</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">sockaddr</span><span class="symbol">);</span>
<span class="normal">    </span><span class="cbracket">}</span>
<span class="normal">  </span><span class="function"><a href="../gobject-The-Base-Object-Type.html#g-object-unref">g_object_unref</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">enumerator</span><span class="symbol">);</span>

<span class="normal">  </span><span class="keyword">if</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">conn</span><span class="symbol">)</span>
<span class="normal">    </span><span class="cbracket">{</span>
<span class="normal">      </span><span class="keyword">if</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">conn_error</span><span class="symbol">)</span>
<span class="normal">        </span><span class="cbracket">{</span>
<span class="normal">          </span><span class="comment">// We couldn't connect to the first address, but we succeeded</span>
<span class="normal">          </span><span class="comment">// in connecting to a later address.</span>
<span class="normal">          </span><span class="function"><a href="../glib-Error-Reporting.html#g-error-free">g_error_free</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">conn_error</span><span class="symbol">);</span>
<span class="normal">        </span><span class="cbracket">}</span>
<span class="normal">      </span><span class="keyword">return</span><span class="normal"> conn</span><span class="symbol">;</span>
<span class="normal">    </span><span class="cbracket">}</span>
<span class="normal">  </span><span class="keyword">else</span><span class="normal"> </span><span class="keyword">if</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">error</span><span class="symbol">)</span>
<span class="normal">    </span><span class="cbracket">{</span>
<span class="normal">      </span><span class="comment">/// Either initial lookup failed, or else the caller cancelled us.</span>
<span class="normal">      </span><span class="keyword">if</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">conn_error</span><span class="symbol">)</span>
<span class="normal">        </span><span class="function"><a href="../glib-Error-Reporting.html#g-error-free">g_error_free</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">conn_error</span><span class="symbol">);</span>
<span class="normal">      </span><span class="keyword">return</span><span class="normal"> <a href="../glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">;</span>
<span class="normal">    </span><span class="cbracket">}</span>
<span class="normal">  </span><span class="keyword">else</span>
<span class="normal">    </span><span class="cbracket">{</span>
<span class="normal">      </span><span class="function">g_error_propagate</span><span class="normal"> </span><span class="symbol">(</span><span class="normal">error</span><span class="symbol">,</span><span class="normal"> conn_error</span><span class="symbol">);</span>
<span class="normal">      </span><span class="keyword">return</span><span class="normal"> <a href="../glib-Standard-Macros.html#NULL:CAPS">NULL</a></span><span class="symbol">;</span>
<span class="normal">    </span><span class="cbracket">}</span>
<span class="cbracket">}</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 <span class="type">GProxyAddresses</span> for 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"><a href="../glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
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 <span class="type">GSocketAddresses</span>.</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>
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