xref: /freebsd/tools/regression/netinet/udpconnectjail/udpconnectjail.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /*-
2  * Copyright (c) 2005 Robert N. M. Watson
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 <sys/param.h>
30 #include <sys/jail.h>
31 #include <sys/socket.h>
32 
33 #include <netinet/in.h>
34 
35 #include <arpa/inet.h>
36 
37 #include <err.h>
38 #include <errno.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43 
44 /*
45  * A bug in the jail(8) code prevented processes in jail from properly
46  * connecting UDP sockets.  This test program attempts to exercise that bug.
47  */
48 
49 static void
50 usage(void)
51 {
52 
53 	fprintf(stderr, "udpconnectjail: no arguments\n");
54 	exit(-1);
55 }
56 
57 static void
58 test(const char *context, struct sockaddr_in *sin)
59 {
60 	int sock;
61 
62 	sock = socket(PF_INET, SOCK_DGRAM, 0);
63 	if (sock == -1)
64 		errx(-1, "%s: socket(PF_INET, SOCK_DGRAM, 0): %s", context,
65 		    strerror(errno));
66 
67 	if (connect(sock, (struct sockaddr *)sin, sizeof(*sin)) < 0)
68 		errx(-1, "%s: connect(%s): %s", context,
69 		    inet_ntoa(sin->sin_addr), strerror(errno));
70 
71 	if (close(sock) < 0)
72 		errx(-1, "%s: close(): %s", context, strerror(errno));
73 }
74 
75 int
76 main(int argc, __unused char *argv[])
77 {
78 	struct sockaddr_in sin;
79 	struct jail thejail;
80 
81 	if (argc != 1)
82 		usage();
83 
84 	bzero(&sin, sizeof(sin));
85 	sin.sin_len = sizeof(sin);
86 	sin.sin_family = AF_INET;
87 	sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
88 	sin.sin_port = htons(8080);	/* Arbitrary */
89 
90 	/*
91 	 * First run the system call test outside of a jail.
92 	 */
93 	test("not in jail", &sin);
94 
95 	/*
96 	 * Now re-run in a jail.
97 	 */
98 	bzero(&thejail, sizeof(thejail));
99 	thejail.version = 0;
100 	thejail.path = "/";
101 	thejail.hostname = "jail";
102 	thejail.ip_number = INADDR_LOOPBACK;
103 	if (jail(&thejail) < 0)
104 		errx(-1, "jail: %s", strerror(errno));
105 	test("in jail", &sin);
106 
107 	fprintf(stdout, "PASS\n");
108 
109 	return (0);
110 }
111