1 /*- 2 * Copyright (c) 2015 George V. Neville-Neil 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <err.h> 28 #include <errno.h> 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <strings.h> 32 #include <sysexits.h> 33 #include <unistd.h> 34 35 #include <sys/socket.h> 36 #include <sys/types.h> 37 #include <netinet/in.h> 38 39 #define PORT 6969 /* Default port */ 40 #define RECV_LIMIT 64 /* When do we move listen to 0? */ 41 42 void usage(void); 43 44 void usage() 45 { 46 err(EX_USAGE, "connect [-p port]\n"); 47 } 48 49 int main(int argc, char **argv) 50 { 51 52 int ch, cli_sock, count = 0; 53 int port = PORT; 54 struct sockaddr_in remoteaddr; 55 56 while ((ch = getopt(argc, argv, "p:")) != -1) { 57 switch (ch) { 58 case 'p': 59 port = atoi(optarg); 60 break; 61 case 'h': 62 default: 63 usage(); 64 } 65 } 66 67 bzero(&remoteaddr, sizeof(remoteaddr)); 68 remoteaddr.sin_len = sizeof(remoteaddr); 69 remoteaddr.sin_family = AF_INET; 70 remoteaddr.sin_port = htons(port); 71 remoteaddr.sin_addr.s_addr = INADDR_ANY; 72 73 cli_sock = socket(AF_INET, SOCK_STREAM, 0); 74 75 while ((cli_sock = connect(cli_sock, (struct sockaddr *)&remoteaddr, 76 sizeof(remoteaddr))) >= 0) { 77 count++; 78 close(cli_sock); 79 cli_sock = socket(AF_INET, SOCK_STREAM, 0); 80 } 81 82 printf("Exiting at %d with errno %d\n", count, errno); 83 84 } 85