qdns.html

QT 下载资料仅供参考

<p> 
<h3 class=fn><a href="qstring.html">QString</a> <a name="canonicalName"></a>QDns::canonicalName () const
</h3>
Returns the canonical name for this DNS node.  (This works
regardless of what <a href="#recordType">recordType</a>() is set to.)
<p> If the canonical name isn't known, this function returns a null
string.
<p> The canonical name of a DNS node is its full name, or the full name of
the target of its CNAME.  For example, if l.trolltech.com is a CNAME to
lupinella.troll.no, and the search path for QDns is "trolltech.com", then
the canonical name for all of "lupinella", "l", "lupinella.troll.no."
and "l.trolltech.com" is "lupinella.troll.no.".

<h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="hostNames"></a>QDns::hostNames () const
</h3>
Returns a list of host names if the record type is <a href="#RecordType-enum">Ptr</a>.
<p> Note that if you want to iterate over the list, you should
iterate over a copy, e.g.
<pre>
    <a href="qstringlist.html">QStringList</a> list = myDns.hostNames();
    QStringList::Iterator it = list.<a href="qvaluelist.html#begin">begin</a>();
    while( it != list.<a href="qvaluelist.html#end">end</a>() ) {
        myProcessing( *it );
        ++it;
    }
    </pre>
 
<p> 
<h3 class=fn>bool <a name="isWorking"></a>QDns::isWorking () const
</h3>
Returns TRUE if QDns is doing a lookup for this object, and FALSE
if this object already has the information it wants.
<p> QDns emits the <a href="#resultsReady">resultsReady</a>() signal when the status changes to FALSE.

<p>Example: <a href="mail-example.html#x751">network/mail/smtp.cpp</a>.
<h3 class=fn><a href="qstring.html">QString</a> <a name="label"></a>QDns::label () const
</h3> 
<p> Returns the domain name for which this object returns information.
<p> <p>See also <a href="#setLabel">setLabel</a>().

<h3 class=fn><a href="qvaluelist.html">QValueList</a>&lt;MailServer&gt; <a name="mailServers"></a>QDns::mailServers () const
</h3>
Returns a list of mail servers if the record type is <a href="#RecordType-enum">Mx</a>. The class
<tt>QDns::MailServer</tt> contains the following public variables:
<ul>
<li> <a href="qstring.html">QString</a> QDns::MailServer::name
<li> Q_UINT16 QDns::MailServer::priority
</ul>
<p> Note that if you want to iterate over the list, you should
iterate over a copy, e.g.
<pre>
    <a href="qvaluelist.html">QValueList</a>&lt;QDns::MailServer&gt; list = myDns.mailServers();
    QValueList&lt;QDns::MailServer&gt;::Iterator it = list.<a href="qvaluelist.html#begin">begin</a>();
    while( it != list.<a href="qvaluelist.html#end">end</a>() ) {
        myProcessing( *it );
        ++it;
    }
    </pre>
 
<p> 
<p>Example: <a href="mail-example.html#x752">network/mail/smtp.cpp</a>.
<h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="qualifiedNames"></a>QDns::qualifiedNames () const
</h3>

<p> Returns a list of the fully qualified names <a href="#label">label</a>() maps to.
<p> Note that if you want to iterate over the list, you should
iterate over a copy, e.g.
<pre>
    <a href="qstringlist.html">QStringList</a> list = myDns.qualifiedNames();
    QStringList::Iterator it = list.<a href="qvaluelist.html#begin">begin</a>();
    while( it != list.<a href="qvaluelist.html#end">end</a>() ) {
        myProcessing( *it );
        ++it;
    }
    </pre>
 
<p> 
<h3 class=fn><a href="qdns.html#RecordType-enum">RecordType</a> <a name="recordType"></a>QDns::recordType () const
</h3>

<p> Returns the record type of this DNS query object.
<p> <p>See also <a href="#setRecordType">setRecordType</a>() and <a href="#RecordType-enum">RecordType</a>.

<h3 class=fn>void <a name="resultsReady"></a>QDns::resultsReady ()<tt> [signal]</tt>
</h3>

<p> This signal is emitted when results are available for one of
the <a href="#qualifiedNames">qualifiedNames</a>().

<p>Example: <a href="mail-example.html#x753">network/mail/smtp.cpp</a>.
<h3 class=fn><a href="qvaluelist.html">QValueList</a>&lt;Server&gt; <a name="servers"></a>QDns::servers () const
</h3>
Returns a list of servers if the record type is <a href="#RecordType-enum">Srv</a>. The class <tt>QDns::Server</tt> contains the following public variables:
<ul>
<li> <a href="qstring.html">QString</a> QDns::Server::name
<li> Q_UINT16 QDns::Server::priority
<li> Q_UINT16 QDns::Server::weight
<li> Q_UINT16 QDns::Server::port
</ul>
<p> Note that if you want to iterate over the list, you should
iterate over a copy, e.g.
<pre>
    <a href="qvaluelist.html">QValueList</a>&lt;QDns::Server&gt; list = myDns.servers();
    QValueList&lt;QDns::Server&gt;::Iterator it = list.<a href="qvaluelist.html#begin">begin</a>();
    while( it != list.<a href="qvaluelist.html#end">end</a>() ) {
        myProcessing( *it );
        ++it;
    }
    </pre>
 

<h3 class=fn>void <a name="setLabel"></a>QDns::setLabel ( const&nbsp;<a href="qstring.html">QString</a>&nbsp;&amp;&nbsp;label )<tt> [virtual]</tt>
</h3>
Sets this DNS query object to query for information about <em>label</em>.
<p> This does not change the <a href="#recordType">recordType</a>(), but its <a href="#isWorking">isWorking</a>() status will
probably change as a result.
<p> The DNS lookup is started the next time the application enters the event
loop. When the result is found the signal <a href="#resultsReady">resultsReady</a>() is emitted.

<h3 class=fn>void <a name="setLabel-2"></a>QDns::setLabel ( const&nbsp;<a href="qhostaddress.html">QHostAddress</a>&nbsp;&amp;&nbsp;address )<tt> [virtual]</tt>
</h3>  This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
<p> Sets this DNS query object to query for information about the host address <em>address</em>. The label is set to the IN-ADDR.ARPA domain name. This is useful in
combination with the Ptr record type (e.g. if you want to look up a hostname
for a given address).

<h3 class=fn>void <a name="setRecordType"></a>QDns::setRecordType ( <a href="qdns.html#RecordType-enum">RecordType</a>&nbsp;rr = A )<tt> [virtual]</tt>
</h3>
Sets this object to query for record type <em>rr</em> records.
<p> The DNS lookup is started the next time the application enters the event
loop. When the result is found the signal <a href="#resultsReady">resultsReady</a>() is emitted.
<p> <p>See also <a href="#RecordType-enum">RecordType</a>.

<h3 class=fn><a href="qstringlist.html">QStringList</a> <a name="texts"></a>QDns::texts () const
</h3>
Returns a list of texts if the record type is <a href="#RecordType-enum">Txt</a>.
<p> Note that if you want to iterate over the list, you should
iterate over a copy, e.g.
<pre>
    <a href="qstringlist.html">QStringList</a> list = myDns.texts();
    QStringList::Iterator it = list.<a href="qvaluelist.html#begin">begin</a>();
    while( it != list.<a href="qvaluelist.html#end">end</a>() ) {
        myProcessing( *it );
        ++it;
    }
    </pre>
 

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