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 * $FreeBSD$
27 */
28
29#include <err.h>
30#include <errno.h>
31#include <stdio.h>
32#include <stdlib.h>
33#include <strings.h>
34#include <sysexits.h>
35#include <unistd.h>
36
37#include <sys/socket.h>
38#include <sys/types.h>
39#include <netinet/in.h>
40
41#define PORT 6969 /* Default port */
42#define RECV_LIMIT 64 /* When do we move listen to 0? */
43
44void usage(void);
45
46void usage()
47{
48	err(EX_USAGE, "connect [-p port]\n");
49}
50
51int main(int argc, char **argv)
52{
53
54	int ch, cli_sock, count = 0;
55	int port = PORT;
56	struct sockaddr_in remoteaddr;
57
58	while ((ch = getopt(argc, argv, "p:")) != -1) {
59		switch (ch) {
60		case 'p':
61			port = atoi(optarg);
62			break;
63		case 'h':
64		default:
65			usage();
66		}
67	}
68
69	bzero(&remoteaddr, sizeof(remoteaddr));
70	remoteaddr.sin_len = sizeof(remoteaddr);
71	remoteaddr.sin_family = AF_INET;
72	remoteaddr.sin_port = htons(port);
73	remoteaddr.sin_addr.s_addr = INADDR_ANY;
74
75	cli_sock = socket(AF_INET, SOCK_STREAM, 0);
76
77	while ((cli_sock = connect(cli_sock, (struct sockaddr *)&remoteaddr,
78				   sizeof(remoteaddr))) >= 0) {
79		count++;
80		close(cli_sock);
81		cli_sock = socket(AF_INET, SOCK_STREAM, 0);
82	}
83
84	printf("Exiting at %d with errno %d\n", count, errno);
85
86}
87