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
40 int
main(void)41 main(void)
42 {
43 struct sockaddr_in sock;
44 socklen_t len;
45 int listen_sock, connect_sock;
46 u_short port;
47
48 listen_sock = -1;
49
50 /* Shutdown(2) on an invalid file descriptor has to return EBADF. */
51 if ((shutdown(listen_sock, SHUT_RDWR) != -1) && (errno != EBADF))
52 errx(-1, "shutdown() for invalid file descriptor does not "
53 "return EBADF");
54
55 listen_sock = socket(PF_INET, SOCK_STREAM, 0);
56 if (listen_sock == -1)
57 errx(-1,
58 "socket(PF_INET, SOCK_STREAM, 0) for listen socket: %s",
59 strerror(errno));
60
61 bzero(&sock, sizeof(sock));
62 sock.sin_len = sizeof(sock);
63 sock.sin_family = AF_INET;
64 sock.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
65 sock.sin_port = 0;
66
67 if (bind(listen_sock, (struct sockaddr *)&sock, sizeof(sock)) < 0)
68 errx(-1, "bind(%s, %d) for listen socket: %s",
69 inet_ntoa(sock.sin_addr), sock.sin_port, strerror(errno));
70
71 len = sizeof(sock);
72 if (getsockname(listen_sock, (struct sockaddr *)&sock, &len) < 0)
73 errx(-1, "getsockname() for listen socket: %s",
74 strerror(errno));
75 port = sock.sin_port;
76
77 if (listen(listen_sock, -1) < 0)
78 errx(-1, "listen() for listen socket: %s", strerror(errno));
79
80 connect_sock = socket(PF_INET, SOCK_STREAM, 0);
81 if (connect_sock == -1)
82 errx(-1, "socket(PF_INET, SOCK_STREAM, 0) for connect "
83 "socket: %s", strerror(errno));
84
85 bzero(&sock, sizeof(sock));
86 sock.sin_len = sizeof(sock);
87 sock.sin_family = AF_INET;
88 sock.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
89 sock.sin_port = port;
90
91 if (connect(connect_sock, (struct sockaddr *)&sock, sizeof(sock)) < 0)
92 errx(-1, "connect() for connect socket: %s", strerror(errno));
93 /* Try to pass an invalid flags. */
94 if ((shutdown(connect_sock, SHUT_RD - 1) != -1) && (errno != EINVAL))
95 errx(-1, "shutdown(SHUT_RD - 1) does not return EINVAL");
96 if ((shutdown(connect_sock, SHUT_RDWR + 1) != -1) && (errno != EINVAL))
97 errx(-1, "shutdown(SHUT_RDWR + 1) does not return EINVAL");
98
99 if (shutdown(connect_sock, SHUT_RD) < 0)
100 errx(-1, "shutdown(SHUT_RD) for connect socket: %s",
101 strerror(errno));
102 if (shutdown(connect_sock, SHUT_WR) < 0)
103 errx(-1, "shutdown(SHUT_WR) for connect socket: %s",
104 strerror(errno));
105
106 close(connect_sock);
107 close(listen_sock);
108
109 return (0);
110 }
111