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 connections  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::common::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  Trackers
       [http://core.tcl.tk/tcllib/reportlist].  Please also report any ideas for enhancements you
       may have for either package and/or documentation.

SEE ALSO

       nameserv::client(3tcl), nameserv::common(3tcl)

KEYWORDS

       name service, server

CATEGORY

       Networking

COPYRIGHT

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