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 
27 #include <sys/param.h>
28 #include <sys/jail.h>
29 #include <sys/socket.h>
30 
31 #include <netinet/in.h>
32 
33 #include <arpa/inet.h>
34 
35 #include <err.h>
36 #include <errno.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <unistd.h>
41 
42 /*
43  * A bug in the jail(8) code prevented processes in jail from properly
44  * connecting UDP sockets.  This test program attempts to exercise that bug.
45  */
46 
47 static void
48 usage(void)
49 {
50 
51 	fprintf(stderr, "udpconnectjail: no arguments\n");
52 	exit(-1);
53 }
54 
55 static void
56 test(const char *context, struct sockaddr_in *sin)
57 {
58 	int sock;
59 
60 	sock = socket(PF_INET, SOCK_DGRAM, 0);
61 	if (sock == -1)
62 		errx(-1, "%s: socket(PF_INET, SOCK_DGRAM, 0): %s", context,
63 		    strerror(errno));
64 
65 	if (connect(sock, (struct sockaddr *)sin, sizeof(*sin)) < 0)
66 		errx(-1, "%s: connect(%s): %s", context,
67 		    inet_ntoa(sin->sin_addr), strerror(errno));
68 
69 	if (close(sock) < 0)
70 		errx(-1, "%s: close(): %s", context, strerror(errno));
71 }
72 
73 int
74 main(int argc, __unused char *argv[])
75 {
76 	struct sockaddr_in sin;
77 	struct jail thejail;
78 	struct in_addr ia4;
79 
80 	if (argc != 1)
81 		usage();
82 
83 	bzero(&sin, sizeof(sin));
84 	sin.sin_len = sizeof(sin);
85 	sin.sin_family = AF_INET;
86 	sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
87 	sin.sin_port = htons(8080);	/* Arbitrary */
88 
89 	/*
90 	 * First run the system call test outside of a jail.
91 	 */
92 	test("not in jail", &sin);
93 
94 	/*
95 	 * Now re-run in a jail.
96 	 * XXX-BZ should switch to jail_set(2).
97 	 */
98 	ia4.s_addr = htonl(INADDR_LOOPBACK);
99 
100 	bzero(&thejail, sizeof(thejail));
101 	thejail.version = JAIL_API_VERSION;
102 	thejail.path = "/";
103 	thejail.hostname = "jail";
104 	thejail.jailname = "udpconnectjail";
105 	thejail.ip4s = 1;
106 	thejail.ip4 = &ia4;
107 
108 	if (jail(&thejail) < 0)
109 		errx(-1, "jail: %s", strerror(errno));
110 	test("in jail", &sin);
111 
112 	fprintf(stdout, "PASS\n");
113 
114 	return (0);
115 }
116