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<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html><head><title>QNetworkConfigurationManager Class Reference</title><style>h3.fn,span.fn { margin-left: 1cm; text-indent: -1cm }
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</style></head><body><table border="0" cellpadding="0" cellspacing="0" width="100%"><tr /><td align="left" valign="top" width="32"><img align="left" border="0" height="32" src="images/rb-logo.png" width="32" /></td><td width="1">  </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a></td></table><h1 align="center">QNetworkConfigurationManager Class Reference<br /><sup><sup>[<a href="qtnetwork.html">QtNetwork</a> module]</sup></sup></h1><p>The QNetworkConfigurationManager class manages the network
configurations provided by the system. <a href="#details">More...</a></p>
<p>Inherits <a href="qobject.html">QObject</a>.</p><h3>Types</h3><ul><li><div class="fn" />class <b><a href="qnetworkconfigurationmanager-capabilities.html">Capabilities</a></b></li><li><div class="fn" />enum <b><a href="qnetworkconfigurationmanager.html#Capability-enum">Capability</a></b> { CanStartAndStopInterfaces, DirectConnectionRouting, SystemSessionSupport, ApplicationLevelRoaming, ..., NetworkSessionRequired }</li></ul><h3>Methods</h3><ul><li><div class="fn" /><b><a href="qnetworkconfigurationmanager.html#QNetworkConfigurationManager">__init__</a></b> (<i>self</i>, QObject <i>parent</i> = None)</li><li><div class="fn" />unknown-type <b><a href="qnetworkconfigurationmanager.html#allConfigurations">allConfigurations</a></b> (<i>self</i>, QNetworkConfiguration.StateFlags <i>flags</i> = 0)</li><li><div class="fn" />Capabilities <b><a href="qnetworkconfigurationmanager.html#capabilities">capabilities</a></b> (<i>self</i>)</li><li><div class="fn" />QNetworkConfiguration <b><a href="qnetworkconfigurationmanager.html#configurationFromIdentifier">configurationFromIdentifier</a></b> (<i>self</i>, QString <i>identifier</i>)</li><li><div class="fn" />QNetworkConfiguration <b><a href="qnetworkconfigurationmanager.html#defaultConfiguration">defaultConfiguration</a></b> (<i>self</i>)</li><li><div class="fn" />bool <b><a href="qnetworkconfigurationmanager.html#isOnline">isOnline</a></b> (<i>self</i>)</li><li><div class="fn" /><b><a href="qnetworkconfigurationmanager.html#updateConfigurations">updateConfigurations</a></b> (<i>self</i>)</li></ul><h3>Qt Signals</h3><ul><li><div class="fn" />void <b><a href="qnetworkconfigurationmanager.html#configurationAdded">configurationAdded</a></b> (const ::QNetworkConfiguration&)</li><li><div class="fn" />void <b><a href="qnetworkconfigurationmanager.html#configurationChanged">configurationChanged</a></b> (const ::QNetworkConfiguration&)</li><li><div class="fn" />void <b><a href="qnetworkconfigurationmanager.html#configurationRemoved">configurationRemoved</a></b> (const ::QNetworkConfiguration&)</li><li><div class="fn" />void <b><a href="qnetworkconfigurationmanager.html#onlineStateChanged">onlineStateChanged</a></b> (bool)</li><li><div class="fn" />void <b><a href="qnetworkconfigurationmanager.html#updateCompleted">updateCompleted</a></b> ()</li></ul><a name="details" /><hr /><h2>Detailed Description</h2><p>The QNetworkConfigurationManager class manages the network
configurations provided by the system.</p>
<p>QNetworkConfigurationManager provides access to the network
configurations known to the system and enables applications to
detect the system capabilities (with regards to network sessions)
at runtime.</p>
<p>A <a href="qnetworkconfiguration.html">QNetworkConfiguration</a>
abstracts a set of configuration options describing how a network
interface has to be configured to connect to a particular target
network. QNetworkConfigurationManager maintains and updates the
global list of QNetworkConfigurations. Applications can access and
filter this list via <a href="qnetworkconfigurationmanager.html#allConfigurations">allConfigurations</a>().
If a new configuration is added or an existing one is removed or
changed the <a href="qnetworkconfigurationmanager.html#configurationAdded">configurationAdded</a>(),
<a href="qnetworkconfigurationmanager.html#configurationRemoved">configurationRemoved</a>()
and <a href="qnetworkconfigurationmanager.html#configurationChanged">configurationChanged</a>()
signals are emitted respectively.</p>
<p>The <a href="qnetworkconfigurationmanager.html#defaultConfiguration">defaultConfiguration</a>()
can be used when intending to immediately create a new network
session without caring about the particular configuration. It
returns a <a href="qnetworkconfiguration.html#StateFlag-enum">QNetworkConfiguration.Discovered</a>
configuration. If there are not any discovered ones an invalid
configuration is returned.</p>
<p>Some configuration updates may require some time to perform
updates. A WLAN scan is such an example. Unless the platform
performs internal updates it may be required to manually trigger
configuration updates via <a href="qnetworkconfigurationmanager.html#updateConfigurations">QNetworkConfigurationManager.updateConfigurations</a>().
The completion of the update process is indicated by emitting the
<a href="qnetworkconfigurationmanager.html#updateCompleted">updateCompleted</a>()
signal. The update process ensures that every existing <a href="qnetworkconfiguration.html">QNetworkConfiguration</a> instance is
updated. There is no need to ask for a renewed configuration list
via <a href="qnetworkconfigurationmanager.html#allConfigurations">allConfigurations</a>().</p>
<hr /><h2>Type Documentation</h2><h3 class="fn"><a name="Capability-enum" />QNetworkConfigurationManager.Capability</h3><p>Specifies the system capabilities of the bearer API. The
possible values are:</p>
<table class="valuelist">
<tr class="odd" valign="top">
<th class="tblConst">Constant</th>
<th class="tblval">Value</th>
<th class="tbldscr">Description</th>
</tr>
<tr>
<td class="topAlign">
<tt>QNetworkConfigurationManager.CanStartAndStopInterfaces</tt></td>
<td class="topAlign"><tt>0x00000001</tt></td>
<td class="topAlign">Network sessions and their underlying access
points can be started and stopped. If this flag is not set <a href="qnetworksession.html">QNetworkSession</a> can only monitor but not
influence the state of access points. On some platforms this
feature may require elevated user permissions. This option is
platform specific and may not always be available.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QNetworkConfigurationManager.DirectConnectionRouting</tt></td>
<td class="topAlign"><tt>0x00000002</tt></td>
<td class="topAlign">Network sessions and their sockets can be
bound to a particular network interface. Any packet that passes
through the socket goes to the specified network interface and thus
disregards standard routing table entries. This may be useful when
two interfaces can reach overlapping IP ranges or an application
has specific needs in regards to target networks. This option is
platform specific and may not always be available.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QNetworkConfigurationManager.SystemSessionSupport</tt></td>
<td class="topAlign"><tt>0x00000004</tt></td>
<td class="topAlign">If this flag is set the underlying platform
ensures that a network interface is not shut down until the last
network session has been <a href="qnetworksession.html#close">closed()</a>. This works across
multiple processes. If the platform session support is missing this
API can only ensure the above behavior for network sessions within
the same process. In general mobile platforms (such as Symbian/S60)
have such support whereas most desktop platform lack this
capability.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QNetworkConfigurationManager.ApplicationLevelRoaming</tt></td>
<td class="topAlign"><tt>0x00000008</tt></td>
<td class="topAlign">The system gives applications control over the
systems roaming behavior. Applications can initiate roaming (in
case the current link is not suitable) and are consulted if the
system has identified a more suitable access point.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QNetworkConfigurationManager.ForcedRoaming</tt></td>
<td class="topAlign"><tt>0x00000010</tt></td>
<td class="topAlign">The system disconnects an existing access
point and reconnects via a more suitable one. The application does
not have any control over this process and has to reconnect its
active sockets.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QNetworkConfigurationManager.DataStatistics</tt></td>
<td class="topAlign"><tt>0x00000020</tt></td>
<td class="topAlign">If this flag is set <a href="qnetworksession.html">QNetworkSession</a> can provide statistics
about transmitted and received data.</td>
</tr>
<tr>
<td class="topAlign">
<tt>QNetworkConfigurationManager.NetworkSessionRequired</tt></td>
<td class="topAlign"><tt>0x00000040</tt></td>
<td class="topAlign">If this flag is set the platform requires that
a network session is created before network operations can be
performed.</td>
</tr>
</table>
<p>The Capabilities type is a typedef for <a href="qflags.html">QFlags</a><Capability>. It stores an OR
combination of Capability values.</p>
<hr /><h2>Method Documentation</h2><h3 class="fn"><a name="QNetworkConfigurationManager" />QNetworkConfigurationManager.__init__ (<i>self</i>, <a href="qobject.html">QObject</a> <i>parent</i> = None)</h3><p>The <i>parent</i> argument, if not None, causes <i>self</i> to be owned by Qt instead of PyQt.</p><p>Constructs a <a href="qnetworkconfigurationmanager.html">QNetworkConfigurationManager</a>
with the given <i>parent</i>.</p>
<p>Note that to ensure a valid list of current configurations
immediately available, updating is done during construction which
causes some delay.</p>
<h3 class="fn"><a name="allConfigurations" />unknown-type QNetworkConfigurationManager.allConfigurations (<i>self</i>, <a href="qnetworkconfiguration-stateflags.html">QNetworkConfiguration.StateFlags</a> <i>flags</i> = 0)</h3><p>Returns the list of configurations which comply with the given
<i>filter</i>.</p>
<p>By default this function returns all (defined and undefined)
configurations.</p>
<p>A wireless network with a particular SSID may only be accessible
in a certain area despite the fact that the system has a valid
configuration for it. Therefore the filter flag may be used to
limit the list to discovered and possibly connected configurations
only.</p>
<p>If <i>filter</i> is set to zero this function returns all
possible configurations.</p>
<p>Note that this function returns the states for all
configurations as they are known at the time of this function call.
If for instance a configuration of type WLAN is defined the system
may have to perform a WLAN scan in order to determine whether it is
actually available. To obtain the most accurate state <a href="qnetworkconfigurationmanager.html#updateConfigurations">updateConfigurations</a>()
should be used to update each configuration's state. Note that such
an update may require some time. It's completion is signalled by
<a href="qnetworkconfigurationmanager.html#updateCompleted">updateCompleted</a>().
In the absence of a configuration update this function returns the
best estimate at the time of the call. Therefore, if WLAN
configurations are of interest, it is recommended that <a href="qnetworkconfigurationmanager.html#updateConfigurations">updateConfigurations</a>()
is called once after <a href="qnetworkconfigurationmanager.html">QNetworkConfigurationManager</a>
instantiation (WLAN scans are too time consuming to perform in
constructor). After this the data is kept automatically up-to-date
as the system reports any changes.</p>
<h3 class="fn"><a name="capabilities" /><a href="qnetworkconfigurationmanager-capabilities.html">Capabilities</a> QNetworkConfigurationManager.capabilities (<i>self</i>)</h3><p>Returns the capabilities supported by the current platform.</p>
<h3 class="fn"><a name="configurationFromIdentifier" /><a href="qnetworkconfiguration.html">QNetworkConfiguration</a> QNetworkConfigurationManager.configurationFromIdentifier (<i>self</i>, QString <i>identifier</i>)</h3><p>Returns the <a href="qnetworkconfiguration.html">QNetworkConfiguration</a> for
<i>identifier</i>; otherwise returns an invalid <a href="qnetworkconfiguration.html">QNetworkConfiguration</a>.</p>
<p><b>See also</b> <a href="qnetworkconfiguration.html#identifier">QNetworkConfiguration.identifier</a>().</p>
<h3 class="fn"><a name="defaultConfiguration" /><a href="qnetworkconfiguration.html">QNetworkConfiguration</a> QNetworkConfigurationManager.defaultConfiguration (<i>self</i>)</h3><p>Returns the default configuration to be used. This function
always returns a discovered configuration; otherwise an invalid
configuration.</p>
<p>In some cases it may be required to call <a href="qnetworkconfigurationmanager.html#updateConfigurations">updateConfigurations</a>()
and wait for the <a href="qnetworkconfigurationmanager.html#updateCompleted">updateCompleted</a>()
signal before calling this function.</p>
<p><b>See also</b> <a href="qnetworkconfigurationmanager.html#allConfigurations">allConfigurations</a>().</p>
<h3 class="fn"><a name="isOnline" />bool QNetworkConfigurationManager.isOnline (<i>self</i>)</h3><p>Returns true if the system is considered to be connected to
another device via an active network interface; otherwise returns
false.</p>
<p>This is equivalent to the following code snippet:</p>
<pre class="cpp">
<span class="type"><a href="qnetworkconfigurationmanager.html">QNetworkConfigurationManager</a></span> mgr;
<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qnetworkconfiguration.html">QNetworkConfiguration</a></span><span class="operator">></span> activeConfigs <span class="operator">=</span> mgr<span class="operator">.</span><a href="qnetworkconfigurationmanager.html#allConfigurations">allConfigurations</a>(<span class="type"><a href="qnetworkconfiguration.html">QNetworkConfiguration</a></span><span class="operator">.</span>Active)
<span class="keyword">if</span> (activeConfigs<span class="operator">.</span>count() <span class="operator">></span> <span class="number">0</span>)
<a href="qtcore.html#Q_ASSERT">Q_ASSERT</a>(mgr<span class="operator">.</span>isOnline())
<span class="keyword">else</span>
<a href="qtcore.html#Q_ASSERT">Q_ASSERT</a>(<span class="operator">!</span>mgr<span class="operator">.</span>isOnline())
</pre>
<p><b>See also</b> <a href="qnetworkconfigurationmanager.html#onlineStateChanged">onlineStateChanged</a>().</p>
<h3 class="fn"><a name="updateConfigurations" />QNetworkConfigurationManager.updateConfigurations (<i>self</i>)</h3><p>Initiates an update of all configurations. This may be used to
initiate WLAN scans or other time consuming updates which may be
required to obtain the correct state for configurations.</p>
<p>This call is asynchronous. On completion of this update the
<a href="qnetworkconfigurationmanager.html#updateCompleted">updateCompleted</a>()
signal is emitted. If new configurations are discovered or old ones
were removed or changed the update process may trigger the emission
of one or multiple <a href="qnetworkconfigurationmanager.html#configurationAdded">configurationAdded</a>(),
<a href="qnetworkconfigurationmanager.html#configurationRemoved">configurationRemoved</a>()
and <a href="qnetworkconfigurationmanager.html#configurationChanged">configurationChanged</a>()
signals.</p>
<p>If a configuration state changes as a result of this update all
existing <a href="qnetworkconfiguration.html">QNetworkConfiguration</a> instances
are updated automatically.</p>
<p><b>See also</b> <a href="qnetworkconfigurationmanager.html#allConfigurations">allConfigurations</a>().</p>
<hr /><h2>Qt Signal Documentation</h2><h3 class="fn"><a name="configurationAdded" />void configurationAdded (const ::QNetworkConfiguration&)</h3><p>This is the default overload of this signal.</p><p>This signal is emitted whenever a new network configuration is
added to the system. The new configuration is specified by
<i>config</i>.</p>
<h3 class="fn"><a name="configurationChanged" />void configurationChanged (const ::QNetworkConfiguration&)</h3><p>This is the default overload of this signal.</p><p>This signal is emitted when the <a href="qnetworkconfiguration.html#state">state</a> of <i>config</i>
changes.</p>
<h3 class="fn"><a name="configurationRemoved" />void configurationRemoved (const ::QNetworkConfiguration&)</h3><p>This is the default overload of this signal.</p><p>This signal is emitted when a configuration is about to be
removed from the system. The removed configuration, specified by
<i>config</i>, is invalid but retains name and identifier.</p>
<p>This function was introduced in Qt 4.8.</p>
<h3 class="fn"><a name="onlineStateChanged" />void onlineStateChanged (bool)</h3><p>This is the default overload of this signal.</p><p>This signal is emitted when the device changes from online to
offline mode or vice versa. <i>isOnline</i> represents the new
state of the device.</p>
<p>The state is considered to be online for as long as <a href="qnetworkconfigurationmanager.html#allConfigurations">allConfigurations</a>(<a href="qnetworkconfiguration.html#StateFlag-enum">QNetworkConfiguration.Active</a>)
returns a list with at least one entry.</p>
<h3 class="fn"><a name="updateCompleted" />void updateCompleted ()</h3><p>This is the default overload of this signal.</p><p>This signal is emitted when the configuration update has been
completed. Such an update can be initiated via <a href="qnetworkconfigurationmanager.html#updateConfigurations">updateConfigurations</a>().</p>
<address><hr /><div align="center"><table border="0" cellspacing="0" width="100%"><tr class="address"><td align="left" width="25%">PyQt 4.12.1 for X11</td><td align="center" width="50%">Copyright © <a href="http://www.riverbankcomputing.com">Riverbank Computing Ltd</a> and <a href="http://www.qt.io">The Qt Company</a> 2015</td><td align="right" width="25%">Qt 4.8.7</td></tr></table></div></address></body></html>
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