1/*
2 * Copyright (c) 2016-2017, Marie Helene Kvello-Aune
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * thislist of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation and/or
13 * other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
17 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <err.h>
28#include <errno.h>
29#include <net/if.h>
30#include <sys/ioctl.h>
31#include <stdio.h>
32#include <stdlib.h>
33#include <string.h>
34#include <libifconfig.h>
35
36
37int
38main(int argc, char *argv[])
39{
40	char *ifname;
41	ifconfig_handle_t *lifh;
42
43	if (argc != 2) {
44		errx(EINVAL, "Invalid number of arguments."
45		    " Only one argument is accepted, and it should be the name"
46		    " of the interface to be destroyed.");
47	}
48
49	/* We have a static number of arguments. Therefore we can do it simple. */
50	ifname = strdup(argv[1]);
51
52	printf("Interface name: %s\n", ifname);
53
54	lifh = ifconfig_open();
55	if (lifh == NULL) {
56		errx(ENOMEM, "Failed to open libifconfig handle.");
57		return (-1);
58	}
59
60	if (ifconfig_destroy_interface(lifh, ifname) == 0) {
61		printf("Successfully destroyed interface '%s'.", ifname);
62		ifconfig_close(lifh);
63		lifh = NULL;
64		free(ifname);
65		return (0);
66	}
67
68	switch (ifconfig_err_errtype(lifh)) {
69	case SOCKET:
70		warnx("couldn't create socket. This shouldn't happen.\n");
71		break;
72	case IOCTL:
73		if (ifconfig_err_ioctlreq(lifh) == SIOCIFDESTROY) {
74			warnx(
75				"Failed to destroy interface (SIOCIFDESTROY)\n");
76		}
77		break;
78	default:
79		warnx(
80			"Should basically never end up here in this example.\n");
81		break;
82	}
83
84	ifconfig_close(lifh);
85	lifh = NULL;
86	free(ifname);
87	return (-1);
88}
89