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| <a href="#GSocketControlMessage.synopsis" class="shortcut">Top</a> |
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| <a href="#GSocketControlMessage.description" class="shortcut">Description</a> |
| | |
| <a href="#GSocketControlMessage.object-hierarchy" class="shortcut">Object Hierarchy</a> |
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| <div class="refentry" title="GSocketControlMessage"> |
| <a name="GSocketControlMessage"></a><div class="titlepage"></div> |
| <div class="refnamediv"><table width="100%"><tr> |
| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="GSocketControlMessage.top_of_page"></a>GSocketControlMessage</span></h2> |
| <p>GSocketControlMessage — A GSocket control message</p> |
| </td> |
| <td valign="top" align="right"></td> |
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| <div class="refsynopsisdiv" title="Synopsis"> |
| <a name="GSocketControlMessage.synopsis"></a><h2>Synopsis</h2> |
| <pre class="synopsis"> <a class="link" href="GSocketControlMessage.html#GSocketControlMessage-struct" title="GSocketControlMessage">GSocketControlMessage</a>; |
| <a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="returnvalue">GSocketControlMessage</span></a> * <a class="link" href="GSocketControlMessage.html#g-socket-control-message-deserialize" title="g_socket_control_message_deserialize ()">g_socket_control_message_deserialize</a> |
| (<em class="parameter"><code><span class="type">int</span> level</code></em>, |
| <em class="parameter"><code><span class="type">int</span> type</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> size</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>); |
| <span class="returnvalue">int</span> <a class="link" href="GSocketControlMessage.html#g-socket-control-message-get-level" title="g_socket_control_message_get_level ()">g_socket_control_message_get_level</a> (<em class="parameter"><code><a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> *message</code></em>); |
| <span class="returnvalue">int</span> <a class="link" href="GSocketControlMessage.html#g-socket-control-message-get-msg-type" title="g_socket_control_message_get_msg_type ()">g_socket_control_message_get_msg_type</a> |
| (<em class="parameter"><code><a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> *message</code></em>); |
| <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a> <a class="link" href="GSocketControlMessage.html#g-socket-control-message-get-size" title="g_socket_control_message_get_size ()">g_socket_control_message_get_size</a> (<em class="parameter"><code><a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> *message</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="GSocketControlMessage.html#g-socket-control-message-serialize" title="g_socket_control_message_serialize ()">g_socket_control_message_serialize</a> (<em class="parameter"><code><a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> *message</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>); |
| </pre> |
| </div> |
| <div class="refsect1" title="Object Hierarchy"> |
| <a name="GSocketControlMessage.object-hierarchy"></a><h2>Object Hierarchy</h2> |
| <pre class="synopsis"> |
| <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a> |
| +----GSocketControlMessage |
| +----<a class="link" href="GUnixFDMessage.html" title="GUnixFDMessage">GUnixFDMessage</a> |
| </pre> |
| </div> |
| <div class="refsect1" title="Description"> |
| <a name="GSocketControlMessage.description"></a><h2>Description</h2> |
| <p> |
| A <a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> is a special-purpose utility message that |
| can be sent to or received from a <a class="link" href="GSocket.html" title="GSocket"><span class="type">GSocket</span></a>. These types of |
| messages are often called "ancillary data". |
| </p> |
| <p> |
| The message can represent some sort of special instruction to or |
| information from the socket or can represent a special kind of |
| transfer to the peer (for example, sending a file description over |
| a UNIX socket). |
| </p> |
| <p> |
| These messages are sent with <a class="link" href="GSocket.html#g-socket-send-message" title="g_socket_send_message ()"><code class="function">g_socket_send_message()</code></a> and received |
| with <a class="link" href="GSocket.html#g-socket-receive-message" title="g_socket_receive_message ()"><code class="function">g_socket_receive_message()</code></a>. |
| </p> |
| <p> |
| To extend the set of control message that can be sent, subclass this |
| class and override the get_size, get_level, get_type and serialize |
| methods. |
| </p> |
| <p> |
| To extend the set of control messages that can be received, subclass |
| this class and implement the deserialize method. Also, make sure your |
| class is registered with the GType typesystem before calling |
| <a class="link" href="GSocket.html#g-socket-receive-message" title="g_socket_receive_message ()"><code class="function">g_socket_receive_message()</code></a> to read such a message. |
| </p> |
| </div> |
| <div class="refsect1" title="Details"> |
| <a name="GSocketControlMessage.details"></a><h2>Details</h2> |
| <div class="refsect2" title="GSocketControlMessage"> |
| <a name="GSocketControlMessage-struct"></a><h3>GSocketControlMessage</h3> |
| <pre class="programlisting">typedef struct _GSocketControlMessage GSocketControlMessage;</pre> |
| <p> |
| Base class for socket-type specific control messages that can be sent and |
| received over <a class="link" href="GSocket.html" title="GSocket"><span class="type">GSocket</span></a>. |
| </p> |
| </div> |
| <hr> |
| <div class="refsect2" title="g_socket_control_message_deserialize ()"> |
| <a name="g-socket-control-message-deserialize"></a><h3>g_socket_control_message_deserialize ()</h3> |
| <pre class="programlisting"><a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="returnvalue">GSocketControlMessage</span></a> * g_socket_control_message_deserialize |
| (<em class="parameter"><code><span class="type">int</span> level</code></em>, |
| <em class="parameter"><code><span class="type">int</span> type</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> size</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre> |
| <p> |
| Tries to deserialize a socket control message of a given |
| <em class="parameter"><code>level</code></em> and <em class="parameter"><code>type</code></em>. This will ask all known (to GType) subclasses |
| of <a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> if they can understand this kind |
| of message and if so deserialize it into a <a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a>. |
| </p> |
| <p> |
| If there is no implementation for this kind of control message, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> |
| will be returned. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>level</code></em> :</span></p></td> |
| <td>a socket level |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>type</code></em> :</span></p></td> |
| <td>a socket control message type for the given <em class="parameter"><code>level</code></em> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>size</code></em> :</span></p></td> |
| <td>the size of the data in bytes |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> |
| <td>pointer to the message data |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> the deserialized message or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> |
| |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 2.22</p> |
| </div> |
| <hr> |
| <div class="refsect2" title="g_socket_control_message_get_level ()"> |
| <a name="g-socket-control-message-get-level"></a><h3>g_socket_control_message_get_level ()</h3> |
| <pre class="programlisting"><span class="returnvalue">int</span> g_socket_control_message_get_level (<em class="parameter"><code><a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> *message</code></em>);</pre> |
| <p> |
| Returns the "level" (i.e. the originating protocol) of the control message. |
| This is often SOL_SOCKET. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>message</code></em> :</span></p></td> |
| <td>a <a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> an integer describing the level |
| |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 2.22</p> |
| </div> |
| <hr> |
| <div class="refsect2" title="g_socket_control_message_get_msg_type ()"> |
| <a name="g-socket-control-message-get-msg-type"></a><h3>g_socket_control_message_get_msg_type ()</h3> |
| <pre class="programlisting"><span class="returnvalue">int</span> g_socket_control_message_get_msg_type |
| (<em class="parameter"><code><a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> *message</code></em>);</pre> |
| <p> |
| Returns the protocol specific type of the control message. |
| For instance, for UNIX fd passing this would be SCM_RIGHTS. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>message</code></em> :</span></p></td> |
| <td>a <a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> an integer describing the type of control message |
| |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 2.22</p> |
| </div> |
| <hr> |
| <div class="refsect2" title="g_socket_control_message_get_size ()"> |
| <a name="g-socket-control-message-get-size"></a><h3>g_socket_control_message_get_size ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a> g_socket_control_message_get_size (<em class="parameter"><code><a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> *message</code></em>);</pre> |
| <p> |
| Returns the space required for the control message, not including |
| headers or alignment. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>message</code></em> :</span></p></td> |
| <td>a <a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> The number of bytes required. |
| |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 2.22</p> |
| </div> |
| <hr> |
| <div class="refsect2" title="g_socket_control_message_serialize ()"> |
| <a name="g-socket-control-message-serialize"></a><h3>g_socket_control_message_serialize ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> g_socket_control_message_serialize (<em class="parameter"><code><a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> *message</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre> |
| <p> |
| Converts the data in the message to bytes placed in the |
| message. |
| </p> |
| <p> |
| <em class="parameter"><code>data</code></em> is guaranteed to have enough space to fit the size |
| returned by <a class="link" href="GSocketControlMessage.html#g-socket-control-message-get-size" title="g_socket_control_message_get_size ()"><code class="function">g_socket_control_message_get_size()</code></a> on this |
| object. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>message</code></em> :</span></p></td> |
| <td>a <a class="link" href="GSocketControlMessage.html" title="GSocketControlMessage"><span class="type">GSocketControlMessage</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> |
| <td>A buffer to write data to |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 2.22</p> |
| </div> |
| </div> |
| <div class="refsect1" title="See Also"> |
| <a name="GSocketControlMessage.see-also"></a><h2>See Also</h2> |
| <a class="link" href="GSocket.html" title="GSocket"><span class="type">GSocket</span></a>. |
| </div> |
| </div> |
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