// ------------------------------- // // -------- 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 gxStream class. */ // ----------------------------------------------------------- // #include <iostream.h> #include <string.h> #include <stdlib.h> #include "gxstream.h" int ReadBlock(gxStream *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(gxStream *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(gxStream *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(gxStream *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(gxStream *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; } gxStream server; gxsSocket_t remote_socket; unsigned short port = (unsigned short) atoi(argv[1]); cout << "Initializing the GX stream server..." << endl; if(server.StreamServer(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 stream server on host " << hostname << endl; while(1) { // Block until the next read. cout << "Listening on port " << port << endl; remote_socket = server.Accept(); if(remote_socket < 0) { cout << server.SocketExceptionMessage() << endl; return 1; } // 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; server.CloseRemoteSocket(); break; case gxAddRemoteBlock: if(AddBlock(&server, gx) != 0) cout << server.SocketExceptionMessage() << endl; server.CloseRemoteSocket(); break; case gxChangeRemoteBlock: if(ChangeBlock(&server, gx) != 0) cout << server.SocketExceptionMessage() << endl; server.CloseRemoteSocket(); break; case gxRequestBlock: if(AnswerRequest(&server, gx) != 0) cout << server.SocketExceptionMessage() << endl; server.CloseRemoteSocket(); break; case gxDeleteRemoteBlock: if(DeleteBlock(&server, gx) != 0) cout << server.SocketExceptionMessage() << endl; server.CloseRemoteSocket(); break; case gxSendBlock : if(ReadBlock(&server, gx) != 0) cout << server.SocketExceptionMessage() << endl; server.CloseRemoteSocket(); break; case gxCloseConnection : cout << "Client sent a close connection command" << endl; server.CloseRemoteSocket(); break; case gxKillServer: cout << "Client shutdown the server" << endl; server.Close(); return 0; default: cout << "Received bad block command from client" << endl; server.CloseRemoteSocket(); break; } } cout << "Exiting..." << endl; return 0; } // ----------------------------------------------------------- // // ------------------------------- // // --------- End of File --------- // // ------------------------------- //