127 lines
3.0 KiB
C++
127 lines
3.0 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2014, University in Hagen,
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Faculty of Mathematics and Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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//paragraph [1] Title: [{\Large \bf \begin{center}] [\end{center}}]
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//paragraph [10] Footnote: [{\footnote{] [}}]
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//[ue] [\"u]
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//[ae] [\"a]
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//[_] [\_]
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//[TOC] [\tableofcontents]
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[1] TCP blackhole
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*/
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#include <iostream>
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <fcntl.h>
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#define BUFFERSIZE 1048576 // 1 MB Buffersize
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#define LISTENPORT 10025
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using namespace std;
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void handleRead(int connfd) {
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char buffer[BUFFERSIZE];
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size_t bytesRead = 1;
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cout << "[Info] Handling new client connection" << endl;
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// Set socket to blocking mode
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int flags = fcntl(connfd, F_GETFL, 0);
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flags = (flags&~O_NONBLOCK);
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fcntl(connfd, F_SETFL, flags);
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while(bytesRead > 0) {
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bytesRead = read(connfd, buffer, BUFFERSIZE);
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}
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if(connfd != 0) {
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shutdown(connfd, 2);
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}
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}
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/*
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2.7 Main function
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The function open a socket, generate requested data and close the socket
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*/
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int main(int argc, char* argv[]) {
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// Our server socket
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struct sockaddr_in serv_addr; // Server address
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struct sockaddr_in client_addr; // Client address
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int listenfd = socket(AF_INET, SOCK_STREAM, 0);
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int connfd = 0;
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memset(&serv_addr, 0, sizeof(serv_addr));
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memset(&client_addr, 0, sizeof(client_addr));
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serv_addr.sin_family = AF_INET;
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serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
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serv_addr.sin_port = htons(LISTENPORT);
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// Bind our socket
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if ((bind(listenfd, (struct sockaddr *)
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&serv_addr, sizeof(serv_addr)) ) < 0) {
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cerr << "[Error] Bind failed" << endl;
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return false;
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}
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// Listen
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if(( listen(listenfd, 10)) < 0 ){
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cerr << "[Error] Listen failed " << endl;
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return false;
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}
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unsigned int clientlen = sizeof(client_addr);
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// Accept connection
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if(! (connfd = accept(listenfd, (struct sockaddr *) &client_addr,
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&clientlen))) {
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cerr << "[Error] Accept failed" << endl;
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return false;
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} else {
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handleRead(connfd);
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}
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if(listenfd != 0) {
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shutdown(connfd, 2);
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connfd = 0;
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}
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return EXIT_SUCCESS;
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} |