nameserv::server(n)					       Name service facility					       nameserv::server(n)

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NAME

       nameserv::server - Name service facility, Server

SYNOPSIS

       package require Tcl  8.4

       package require nameserv::server  ?0.3.2?

       package require comm

       package require interp

       package require logger

       ::nameserv::server::start

       ::nameserv::server::stop

       ::nameserv::server::active?

       ::nameserv::server::cget -option

       ::nameserv::server::configure

       ::nameserv::server::configure -option

       ::nameserv::server::configure -option value...

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DESCRIPTION

       Please read Name service facility, introduction first.

       This  package  provides	an  implementation of the serviver side of the name service facility queried by the client provided by the package
       nameserv. All information required by the server will be held in memory. There is no persistent state.

       This service is built in top of and for the package comm.  It has nothing to do with the Internet's Domain Name System. If  the	reader	is
       looking for a package dealing with that please see Tcllib's packages dns and resolv.

       This server supports the Core protocol feature, and since version 0.3 the Search/Continuous feature as well.

API

       The package exports five commands, as specified below:

       ::nameserv::server::start
	      This  command  starts  the  server  and causes it to listen on the configured port. From now on clients are able to connect and make
	      requests. The result of the command is the empty string.

	      Note that any incoming requests will only be handled if the application the server is part of does enter an event  loop  after  this
	      command has been run.

       ::nameserv::server::stop
	      Invoking	this  command stops the server and releases all information it had. Existing connections are shut down, and no new connec-
	      tions will be accepted any longer. The result of the command is the empty string.

       ::nameserv::server::active?
	      This command returns a boolean value indicating the state of the server. The result will be true if the server is active,  i.e.  has
	      been started, and false otherwise.

       ::nameserv::server::cget -option
	      This  command  returns the currently configured value for the specified -option. The list of supported options and their meaning can
	      be found in section OPTIONS.

       ::nameserv::server::configure
	      In this form the command returns a dictionary of all supported options, and their current values. The list of supported options  and
	      their meaning can be found in section OPTIONS.

       ::nameserv::server::configure -option
	      In  this	form the command is an alias for "::nameserv::server::cget -option]".  The list of supported options and their meaning can
	      be found in section OPTIONS.

       ::nameserv::server::configure -option value...
	      In this form the command is used to configure one or more of the supported options. At least one option has  to  be  specified,  and
	      each option is followed by its new value.  The list of supported options and their meaning can be found in section OPTIONS.

	      This  form  can  be  used  only if the server is not active, i.e. has not been started yet, or has been stopped. While the server is
	      active it cannot be reconfigured.

OPTIONS

       The options supported by the server are for the specification of the TCP port to listen on, and whether to accept non-local connections	or
       not.  They are:

       -localonly bool
	      This  option  specifies  whether	to  accept only local connections (-localonly 1) or remote connections as well (-localonly 0). The
	      default is to accept only local connections.

       -port number
	      This option specifies the port the name service will listen on after it has been started. It has to be a positive integer number	(>
	      0)  not  greater	than  65536  (unsigned	short). The initial default is the number returned by the command ::nameserv::server::com-
	      mon::port, as provided by the package ::nameserv::server::common.

HISTORY

       0.3    Extended the server with the ability to perform asynchronous and continuous searches.

       0.2    Changed name of -local switch to -localonly.

       0.1    Initial implementation of the server.

BUGS, IDEAS, FEEDBACK
       This document, and the package it describes, will undoubtedly contain bugs and other problems.  Please report such in the category nameserv
       of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you may have for
       either package and/or documentation.

SEE ALSO

       nameserv::client(n), nameserv::common(n)

KEYWORDS

       name service, server

CATEGORY

       Networking

COPYRIGHT

       Copyright (c) 2007-2008 Andreas Kupries <andreas_kupries@users.sourceforge.net>

nns								       0.3.2						       nameserv::server(n)