// ------------------------------- //
// -------- Start of File -------- //
// ------------------------------- //
// ----------------------------------------------------------- //
// C++ Source Code File Name: server.cpp
// C++ Compiler Used: MSVC, BCC32, GCC, HPUX aCC, SOLARIS CC
// Produced By: glNET Software
// File Creation Date: 09/20/1999
// Date Last Modified: 05/25/2001
// Copyright (c) 2001 glNET Software
// ----------------------------------------------------------- //
// ------------- Program Description and Details ------------- //
// ----------------------------------------------------------- //
/*
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA
This program is used to the gxDatagram class.
*/
// ----------------------------------------------------------- //
#include <iostream.h>
#include <string.h>
#include <stdlib.h>
#include "gxdatagm.h"
int ReadBlock(gxDatagram *server, gxBlockHeader &gx)
{
cout << "Reading a raw block of data" << endl;
char *buf = new char[(__ULWORD__)gx.block_length];
if(server->ReadRemoteBlock(buf, gx) != 0) return 1;
buf[(__ULWORD__)gx.block_length] = 0;
cout << buf;
cout << server->BytesRead() << " bytes received." << endl;
delete buf;
return 0;
}
int AnswerRequest(gxDatagram *server, gxBlockHeader &gx)
{
cout << "Client has requested a block" << endl;
char *test_block = "The quick brown fox jumps over the lazy dog \
0123456789\n";
char *buf = new char[(__ULWORD__)gx.block_length];
if(server->ReadRemoteBlock(buf, gx) != 0) return 1;
buf[(__ULWORD__)gx.block_length] = 0;
cout << "Client has requested block: " << buf << endl;
delete buf;
cout << "Answering request" << endl;
if(server->WriteRemoteBlock((char *)test_block, strlen(test_block))
!= 0) return 1;
return 0;
}
int ChangeBlock(gxDatagram *server, gxBlockHeader &gx)
{
cout << "Received a change block request" << endl;
char *buf = new char[(__ULWORD__)gx.block_length];
if(server->ReadRemoteBlock(buf, gx) != 0) return 1;
buf[(__ULWORD__)gx.block_length] = 0;
cout << "Client requested that block \"" << buf << "\" be changed to:"
<< endl << flush;
delete buf;
gxBlockHeader block_header;
if(server->ReadClientHeader(block_header) != 0) return 1;
char *block = new char[(__ULWORD__)block_header.block_length];
if(server->ReadRemoteBlock((char *)block, block_header) != 0) return 1;
block[(__ULWORD__)block_header.block_length] = 0;
cout << block << flush;
delete block;
return 0;
}
int AddBlock(gxDatagram *server, gxBlockHeader &gx)
{
cout << "Received an add block request" << endl;
char *block = new char[(__ULWORD__)gx.block_length];
if(server->ReadRemoteBlock(block, gx) != 0) return 1;
block[(__ULWORD__)gx.block_length] = 0;
cout << "Client has requested the following block be added:" << endl;
cout << block << flush;
delete block;
return 0;
}
int DeleteBlock(gxDatagram *server, gxBlockHeader &gx)
{
cout << "Received a delete block request" << endl;
char *buf = new char[(__ULWORD__)gx.block_length];
if(server->ReadRemoteBlock(buf, gx) != 0) return 1;
buf[(__ULWORD__)gx.block_length] = 0;
cout << "Client has requested block \"" << buf << "\" be deleted" << endl;
delete buf;
return 0;
}
int main(int argc, char **argv)
{
// Check arguments. Should be only one: the port number to bind to.
if(argc != 2) {
cerr << "Usage: " << argv[0] << " port" << endl;
return 1;
}
gxDatagram server;
unsigned short port = (unsigned short) atoi(argv[1]);
cout << "Initializing the GX datagram server..." << endl;
if(server.DatagramServer(port) != 0) {
cout << server.SocketExceptionMessage() << endl;
return 1;
}
// Get the host name assigned to this machine
char hostname[gxsMAX_NAME_LEN];
if(server.HostName(hostname) != 0) {
cout << server.SocketExceptionMessage() << endl;
return 1;
}
cout << "Opening datagram server on host " << hostname << endl;
// Find out what port was really assigned
int assigned_port;
if(server.PortNumber(assigned_port) != 0) {
cout << server.SocketExceptionMessage() << endl;
return 1;
}
cout << "Port assigned is " << assigned_port << endl;
while(1) { // Block until the next read.
// Read the block following a client connection
gxBlockHeader gx;
if(server.ReadClientHeader(gx) != 0) {
cout << server.SocketExceptionMessage() << endl;
return 1;
}
// Get the client info
char client_name[gxsMAX_NAME_LEN]; int r_port = -1;
server.GetClientInfo(client_name, r_port);
cout << client_name << " connecting on port " << r_port << endl;
// Read the status byte to determine what to do with this block
__ULWORD__ block_status = gx.block_status;
__SBYTE__ status = (__SBYTE__)((block_status & 0xFF00)>>8);
switch(status) {
// Process each block of data
case gxAcknowledgeBlock:
cout << "Received an acknowledge block command" << endl;
cout << "Sending acknowledgment" << endl;
if(server.WriteRemoteAckBlock() != 0)
cout << server.SocketExceptionMessage() << endl;
break;
case gxAddRemoteBlock:
if(AddBlock(&server, gx) != 0)
cout << server.SocketExceptionMessage() << endl;
break;
case gxChangeRemoteBlock:
if(ChangeBlock(&server, gx) != 0)
cout << server.SocketExceptionMessage() << endl;
break;
case gxRequestBlock:
if(AnswerRequest(&server, gx) != 0)
cout << server.SocketExceptionMessage() << endl;
break;
case gxDeleteRemoteBlock:
if(DeleteBlock(&server, gx) != 0)
cout << server.SocketExceptionMessage() << endl;
break;
case gxSendBlock :
if(ReadBlock(&server, gx) != 0)
cout << server.SocketExceptionMessage() << endl;
break;
case gxCloseConnection :
cout << "Client sent a close connection command" << endl;
break;
case gxKillServer:
cout << "Client shutdown the server" << endl;
server.Close();
return 0;
default:
cout << "Received bad block command from client" << endl;
break;
}
}
cout << "Exiting..." << endl;
return 0;
}
// ----------------------------------------------------------- //
// ------------------------------- //
// --------- End of File --------- //
// ------------------------------- //