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







nameserv::server - Name service facility, Server








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...












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.








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.

  










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:



  

  
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.

  

  
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.











  
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.










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.








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








name service, server








Networking








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








  

    0.3.2
    nns