archie/tcl-dp/doc/dp_netinfo.html

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<h3>dp_netinfo</h3>
<dl>
<dt><b>Syntax</b></dt>
<dt>&nbsp;</dt>
<dt><tt>dp_netinfo </tt><em><tt>option</tt></em><tt> </tt><em><tt>args</tt></em></dt>
<dt>&nbsp;</dt>
<dt><b>Comments</b></dt>
<dt>&nbsp;</dt>
<dt><i>Option</i>&nbsp;can be one of the following:</dt>
</dl>
<ul>
<li>-service</li>
<li>-address</li>
</ul>
<p>The -service option takes one argument: a service name or port
number.&nbsp; Enter a service name (i.e. &quot;http&quot; or
&quot;telnet&quot;) and dp_netinfo will return the active server
port for that service based on the system configuration.&nbsp; In
UNIX, this information is usually stored in /etc/services.&nbsp;
Likewise, you can give it a port number and it will return the
name of the service on that port.</p>
<p>The -address options allows one to translate from IP address
to hostname and vice versa.&nbsp; It also takes one
argument:&nbsp;an IP&nbsp;address (127.0.0.1) or a hostname
(www.foobar.com) and returns the cooresponding value.</p>
<p><b>Examples</b></p>
<dl>
<dt><tt>dp_netinfo -service http</tt></dt>
<dt><tt>dp_netinfo -service 80</tt></dt>
<dt><tt>dp_netinfo -address www.foobar.com</tt></dt>
<dt><tt>dp_netinfo -address 127.0.0.1</tt></dt>
<dt>&nbsp;</dt>
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