1/*-
2 * Copyright (C) 2005 The FreeBSD Project.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD$
26 */
27
28#include <sys/types.h>
29#include <sys/socket.h>
30
31#include <netinet/in.h>
32#include <arpa/inet.h>
33
34#include <err.h>
35#include <errno.h>
36#include <stdio.h>
37#include <string.h>
38#include <unistd.h>
39
40int
41main(void)
42{
43	struct sockaddr_in sock;
44	socklen_t len;
45	int listen_sock, connect_sock;
46	u_short port;
47
48	/* Shutdown(2) on an invalid file descriptor has to return EBADF. */
49	if ((shutdown(listen_sock, SHUT_RDWR) != -1) && (errno != EBADF))
50		errx(-1, "shutdown() for invalid file descriptor does not "
51		    "return EBADF");
52
53	listen_sock = socket(PF_INET, SOCK_STREAM, 0);
54	if (listen_sock == -1)
55		errx(-1,
56		    "socket(PF_INET, SOCK_STREAM, 0) for listen socket: %s",
57		    strerror(errno));
58
59	bzero(&sock, sizeof(sock));
60	sock.sin_len = sizeof(sock);
61	sock.sin_family = AF_INET;
62	sock.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
63	sock.sin_port = 0;
64
65	if (bind(listen_sock, (struct sockaddr *)&sock, sizeof(sock)) < 0)
66		errx(-1, "bind(%s, %d) for listen socket: %s",
67		    inet_ntoa(sock.sin_addr), sock.sin_port, strerror(errno));
68
69	len = sizeof(sock);
70	if (getsockname(listen_sock, (struct sockaddr *)&sock, &len) < 0)
71		errx(-1, "getsockname() for listen socket: %s",
72		    strerror(errno));
73	port = sock.sin_port;
74
75	if (listen(listen_sock, -1) < 0)
76		errx(-1, "listen() for listen socket: %s", strerror(errno));
77
78	connect_sock = socket(PF_INET, SOCK_STREAM, 0);
79	if (connect_sock == -1)
80		errx(-1, "socket(PF_INET, SOCK_STREAM, 0) for connect "
81		    "socket: %s", strerror(errno));
82
83	bzero(&sock, sizeof(sock));
84	sock.sin_len = sizeof(sock);
85	sock.sin_family = AF_INET;
86	sock.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
87	sock.sin_port = port;
88
89	if (connect(connect_sock, (struct sockaddr *)&sock, sizeof(sock)) < 0)
90		errx(-1, "connect() for connect socket: %s", strerror(errno));
91	/* Try to pass an invalid flags. */
92	if ((shutdown(connect_sock, SHUT_RD - 1) != -1) && (errno != EINVAL))
93		errx(-1, "shutdown(SHUT_RD - 1) does not return EINVAL");
94	if ((shutdown(connect_sock, SHUT_RDWR + 1) != -1) && (errno != EINVAL))
95		errx(-1, "shutdown(SHUT_RDWR + 1) does not return EINVAL");
96
97	if (shutdown(connect_sock, SHUT_RD) < 0)
98		errx(-1, "shutdown(SHUT_RD) for connect socket: %s",
99		    strerror(errno));
100	if (shutdown(connect_sock, SHUT_WR) < 0)
101		errx(-1, "shutdown(SHUT_WR) for connect socket: %s",
102		    strerror(errno));
103
104	close(connect_sock);
105	close(listen_sock);
106
107	return (0);
108}
109