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TelnetOptionHandler (libcommons-net2-java API)
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org.apache.commons.net.telnet</FONT>
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Class TelnetOptionHandler</H2>
<PRE>
<A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
<IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.commons.net.telnet.TelnetOptionHandler</B>
</PRE>
<DL>
<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../../org/apache/commons/net/telnet/EchoOptionHandler.html" title="class in org.apache.commons.net.telnet">EchoOptionHandler</A>, <A HREF="../../../../../org/apache/commons/net/telnet/SimpleOptionHandler.html" title="class in org.apache.commons.net.telnet">SimpleOptionHandler</A>, <A HREF="../../../../../org/apache/commons/net/telnet/SuppressGAOptionHandler.html" title="class in org.apache.commons.net.telnet">SuppressGAOptionHandler</A>, <A HREF="../../../../../org/apache/commons/net/telnet/TerminalTypeOptionHandler.html" title="class in org.apache.commons.net.telnet">TerminalTypeOptionHandler</A>, <A HREF="../../../../../org/apache/commons/net/telnet/WindowSizeOptionHandler.html" title="class in org.apache.commons.net.telnet">WindowSizeOptionHandler</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public abstract class <B>TelnetOptionHandler</B><DT>extends <A HREF="file:///usr/share/doc/default-jdk-doc/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
</PRE>
<P>
The TelnetOptionHandler class is the base class to be used
for implementing handlers for telnet options.
<p>
TelnetOptionHandler implements basic option handling
functionality and defines abstract methods that must be
implemented to define subnegotiation behaviour.
<p>
<P>
<P>
<DL>
<DT><B>Author:</B></DT>
<DD>Bruno D'Avanzo</DD>
</DL>
<HR>
<P>
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<TD><CODE><B><A HREF="../../../../../org/apache/commons/net/telnet/TelnetOptionHandler.html#TelnetOptionHandler(int, boolean, boolean, boolean, boolean)">TelnetOptionHandler</A></B>(int optcode,
boolean initlocal,
boolean initremote,
boolean acceptlocal,
boolean acceptremote)</CODE>
<BR>
Constructor for the TelnetOptionHandler.</TD>
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<CODE>abstract int[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/net/telnet/TelnetOptionHandler.html#answerSubnegotiation(int[], int)">answerSubnegotiation</A></B>(int[] suboptionData,
int suboptionLength)</CODE>
<BR>
Method called upon reception of a subnegotiation for this option
coming from the other end.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/net/telnet/TelnetOptionHandler.html#getAcceptLocal()">getAcceptLocal</A></B>()</CODE>
<BR>
Returns a boolean indicating whether to accept a DO
request coming from the other end.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/net/telnet/TelnetOptionHandler.html#getAcceptRemote()">getAcceptRemote</A></B>()</CODE>
<BR>
Returns a boolean indicating whether to accept a WILL
request coming from the other end.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/net/telnet/TelnetOptionHandler.html#getInitLocal()">getInitLocal</A></B>()</CODE>
<BR>
Returns a boolean indicating whether to send a WILL request
to the other end upon connection.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/net/telnet/TelnetOptionHandler.html#getInitRemote()">getInitRemote</A></B>()</CODE>
<BR>
Returns a boolean indicating whether to send a DO request
to the other end upon connection.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/net/telnet/TelnetOptionHandler.html#getOptionCode()">getOptionCode</A></B>()</CODE>
<BR>
Returns the option code for this option.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/net/telnet/TelnetOptionHandler.html#setAcceptLocal(boolean)">setAcceptLocal</A></B>(boolean accept)</CODE>
<BR>
Set behaviour of the option for DO requests coming from
the other end.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/net/telnet/TelnetOptionHandler.html#setAcceptRemote(boolean)">setAcceptRemote</A></B>(boolean accept)</CODE>
<BR>
Set behaviour of the option for WILL requests coming from
the other end.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/net/telnet/TelnetOptionHandler.html#setInitLocal(boolean)">setInitLocal</A></B>(boolean init)</CODE>
<BR>
Tells this option whether to send a WILL request upon connection.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/net/telnet/TelnetOptionHandler.html#setInitRemote(boolean)">setInitRemote</A></B>(boolean init)</CODE>
<BR>
Tells this option whether to send a DO request upon connection.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>abstract int[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/net/telnet/TelnetOptionHandler.html#startSubnegotiationLocal()">startSubnegotiationLocal</A></B>()</CODE>
<BR>
This method is invoked whenever this option is acknowledged active on
the local end (TelnetClient sent a WILL, remote side sent a DO).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>abstract int[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/commons/net/telnet/TelnetOptionHandler.html#startSubnegotiationRemote()">startSubnegotiationRemote</A></B>()</CODE>
<BR>
This method is invoked whenever this option is acknowledged active on
the remote end (TelnetClient sent a DO, remote side sent a WILL).</TD>
</TR>
</TABLE>
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<A NAME="TelnetOptionHandler(int, boolean, boolean, boolean, boolean)"><!-- --></A><H3>
TelnetOptionHandler</H3>
<PRE>
public <B>TelnetOptionHandler</B>(int optcode,
boolean initlocal,
boolean initremote,
boolean acceptlocal,
boolean acceptremote)</PRE>
<DL>
<DD>Constructor for the TelnetOptionHandler. Allows defining desired
initial setting for local/remote activation of this option and
behaviour in case a local/remote activation request for this
option is received.
<p>
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>optcode</CODE> - - Option code.<DD><CODE>initlocal</CODE> - - if set to true, a WILL is sent upon connection.<DD><CODE>initremote</CODE> - - if set to true, a DO is sent upon connection.<DD><CODE>acceptlocal</CODE> - - if set to true, any DO request is accepted.<DD><CODE>acceptremote</CODE> - - if set to true, any WILL request is accepted.</DL>
</DL>
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<A NAME="getOptionCode()"><!-- --></A><H3>
getOptionCode</H3>
<PRE>
public int <B>getOptionCode</B>()</PRE>
<DL>
<DD>Returns the option code for this option.
<p>
<P>
<DD><DL>
<DT><B>Returns:</B><DD>Option code.</DL>
</DD>
</DL>
<HR>
<A NAME="getAcceptLocal()"><!-- --></A><H3>
getAcceptLocal</H3>
<PRE>
public boolean <B>getAcceptLocal</B>()</PRE>
<DL>
<DD>Returns a boolean indicating whether to accept a DO
request coming from the other end.
<p>
<P>
<DD><DL>
<DT><B>Returns:</B><DD>true if a DO request shall be accepted.</DL>
</DD>
</DL>
<HR>
<A NAME="getAcceptRemote()"><!-- --></A><H3>
getAcceptRemote</H3>
<PRE>
public boolean <B>getAcceptRemote</B>()</PRE>
<DL>
<DD>Returns a boolean indicating whether to accept a WILL
request coming from the other end.
<p>
<P>
<DD><DL>
<DT><B>Returns:</B><DD>true if a WILL request shall be accepted.</DL>
</DD>
</DL>
<HR>
<A NAME="setAcceptLocal(boolean)"><!-- --></A><H3>
setAcceptLocal</H3>
<PRE>
public void <B>setAcceptLocal</B>(boolean accept)</PRE>
<DL>
<DD>Set behaviour of the option for DO requests coming from
the other end.
<p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>accept</CODE> - - if true, subsequent DO requests will be accepted.</DL>
</DD>
</DL>
<HR>
<A NAME="setAcceptRemote(boolean)"><!-- --></A><H3>
setAcceptRemote</H3>
<PRE>
public void <B>setAcceptRemote</B>(boolean accept)</PRE>
<DL>
<DD>Set behaviour of the option for WILL requests coming from
the other end.
<p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>accept</CODE> - - if true, subsequent WILL requests will be accepted.</DL>
</DD>
</DL>
<HR>
<A NAME="getInitLocal()"><!-- --></A><H3>
getInitLocal</H3>
<PRE>
public boolean <B>getInitLocal</B>()</PRE>
<DL>
<DD>Returns a boolean indicating whether to send a WILL request
to the other end upon connection.
<p>
<P>
<DD><DL>
<DT><B>Returns:</B><DD>true if a WILL request shall be sent upon connection.</DL>
</DD>
</DL>
<HR>
<A NAME="getInitRemote()"><!-- --></A><H3>
getInitRemote</H3>
<PRE>
public boolean <B>getInitRemote</B>()</PRE>
<DL>
<DD>Returns a boolean indicating whether to send a DO request
to the other end upon connection.
<p>
<P>
<DD><DL>
<DT><B>Returns:</B><DD>true if a DO request shall be sent upon connection.</DL>
</DD>
</DL>
<HR>
<A NAME="setInitLocal(boolean)"><!-- --></A><H3>
setInitLocal</H3>
<PRE>
public void <B>setInitLocal</B>(boolean init)</PRE>
<DL>
<DD>Tells this option whether to send a WILL request upon connection.
<p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>init</CODE> - - if true, a WILL request will be sent upon subsequent
connections.</DL>
</DD>
</DL>
<HR>
<A NAME="setInitRemote(boolean)"><!-- --></A><H3>
setInitRemote</H3>
<PRE>
public void <B>setInitRemote</B>(boolean init)</PRE>
<DL>
<DD>Tells this option whether to send a DO request upon connection.
<p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>init</CODE> - - if true, a DO request will be sent upon subsequent
connections.</DL>
</DD>
</DL>
<HR>
<A NAME="answerSubnegotiation(int[], int)"><!-- --></A><H3>
answerSubnegotiation</H3>
<PRE>
public abstract int[] <B>answerSubnegotiation</B>(int[] suboptionData,
int suboptionLength)</PRE>
<DL>
<DD>Method called upon reception of a subnegotiation for this option
coming from the other end.
Must be implemented by the actual TelnetOptionHandler to specify
which response must be sent for the subnegotiation request.
<p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>suboptionData</CODE> - - the sequence received, whithout IAC SB & IAC SE<DD><CODE>suboptionLength</CODE> - - the length of data in suboption_data
<p>
<DT><B>Returns:</B><DD>response to be sent to the subnegotiation sequence. TelnetClient
will add IAC SB & IAC SE. null means no response</DL>
</DD>
</DL>
<HR>
<A NAME="startSubnegotiationLocal()"><!-- --></A><H3>
startSubnegotiationLocal</H3>
<PRE>
public abstract int[] <B>startSubnegotiationLocal</B>()</PRE>
<DL>
<DD>This method is invoked whenever this option is acknowledged active on
the local end (TelnetClient sent a WILL, remote side sent a DO).
The method is used to specify a subnegotiation sequence that will be
sent by TelnetClient when the option is activated.
<p>
<P>
<DD><DL>
<DT><B>Returns:</B><DD>subnegotiation sequence to be sent by TelnetClient. TelnetClient
will add IAC SB & IAC SE. null means no subnegotiation.</DL>
</DD>
</DL>
<HR>
<A NAME="startSubnegotiationRemote()"><!-- --></A><H3>
startSubnegotiationRemote</H3>
<PRE>
public abstract int[] <B>startSubnegotiationRemote</B>()</PRE>
<DL>
<DD>This method is invoked whenever this option is acknowledged active on
the remote end (TelnetClient sent a DO, remote side sent a WILL).
The method is used to specify a subnegotiation sequence that will be
sent by TelnetClient when the option is activated.
<p>
<P>
<DD><DL>
<DT><B>Returns:</B><DD>subnegotiation sequence to be sent by TelnetClient. TelnetClient
will add IAC SB & IAC SE. null means no subnegotiation.</DL>
</DD>
</DL>
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