1 /*-
2 * Copyright (c) 2024 Kyle Evans <kevans@FreeBSD.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7 /*
8 * This test simply configures the tunnel as transient and exits. By the time
9 * we return, the tunnel should be gone because the last reference disappears.
10 */
11
12 #include <sys/types.h>
13 #include <sys/ioctl.h>
14 #include <net/if_tun.h>
15 #include <net/if_tap.h>
16
17 #include <assert.h>
18 #include <err.h>
19 #include <fcntl.h>
20 #include <string.h>
21 #include <unistd.h>
22
23 int
main(int argc,char * argv[])24 main(int argc, char *argv[])
25 {
26 unsigned long tunreq;
27 const char *tundev;
28 int one = 1, tunfd;
29
30 assert(argc > 1);
31 tundev = argv[1];
32
33 tunfd = open(tundev, O_RDWR);
34 assert(tunfd >= 0);
35
36 /*
37 * These are technically the same request, but we'll use the technically
38 * correct one just in case.
39 */
40 if (strstr(tundev, "tun") != NULL) {
41 tunreq = TUNSTRANSIENT;
42 } else {
43 assert(strstr(tundev, "tap") != NULL);
44 tunreq = TAPSTRANSIENT;
45 }
46
47 if (ioctl(tunfd, tunreq, &one) == -1)
48 err(1, "ioctl");
49
50 /* Final close should destroy the tunnel automagically. */
51 close(tunfd);
52
53 return (0);
54 }
55