{ GPC demo program for the Socket unit (server side)

  Copyright 2002-2006 Frank Heckenbach <frank@pascal.gnu.de>

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation, version 2.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; see the file COPYING. If not, write to
  the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  Boston, MA 02111-1307, USA.

  As a special exception, if you incorporate even large parts of the
  code of this demo program into another program with substantially
  different functionality, this does not cause the other program to
  be covered by the GNU General Public License. This exception does
  not however invalidate any other reasons why it might be covered
  by the GNU General Public License. }

{$gnu-pascal,I+}
{$if __GPC_RELEASE__ < 20041017}
{$error This unit requires GPC release 20041017 or newer.}
{$endif}

program ServerDemo;

uses GPC, Socket;

const
  Port = 9752;

var
  Error, HostAddress, HostName, s: TString;
  SI, SO, FI, FO: Text;

begin
  OpenStreamSocket (nil, Port, SI, SO, Error);
  if Error <> '' then
    begin
      WriteLn (StdErr, ParamStr (0), ': ', Error);
      Halt (1)
    end;
  repeat
    WriteLn ('Waiting for connection on port ', Port, ' ...');
    if not AcceptConnection (SI, FI, FO, HostAddress, HostName, Null) then
      begin
        WriteLn (StdErr, ParamStr (0), ': error while accepting connection');
        Halt (1)
      end;
    WriteLn ('Accepted connection from ', HostName, ' (', HostAddress, ')');
    WriteLn (FO, 'Hi, this is the GPC server demo. Enter one line.');
    ReadLn (FI, s);
    WriteLn ('Client wrote: ', s);
    WriteLn (FO, 'You wrote: ', s);
    WriteLn ('Closing connection.');
    Close (FI);
    Close (FO);
    WriteLn
  until False
end.