1 /*
2  * Copyright (c) 2016, 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  * $FreeBSD$
27  */
28 
29 #include <err.h>
30 #include <errno.h>
31 #include <net/if.h>
32 #include <sys/ioctl.h>
33 #include <stdio.h>
34 #include <stdlib.h>
35 #include <string.h>
36 #include <libifconfig.h>
37 
38 
39 int
40 main(int argc, char *argv[])
41 {
42 	char *ifname;
43 
44 	if (argc != 2) {
45 		errx(EINVAL, "Invalid number of arguments."
46 		    " Only one argument is accepted, and it should be the name"
47 		    " of the interface to be destroyed.");
48 	}
49 
50 	/* We have a static number of arguments. Therefore we can do it simple. */
51 	ifname = strdup(argv[1]);
52 
53 	printf("Interface name: %s\n", ifname);
54 
55 	ifconfig_handle_t *lifh = ifconfig_open();
56 	if (ifconfig_destroy_interface(lifh, ifname) == 0) {
57 		printf("Successfully destroyed interface '%s'.", ifname);
58 		ifconfig_close(lifh);
59 		lifh = NULL;
60 		free(ifname);
61 		return (0);
62 	}
63 
64 	switch (ifconfig_err_errtype(lifh)) {
65 	case SOCKET:
66 		warnx("couldn't create socket. This shouldn't happen.\n");
67 		break;
68 	case IOCTL:
69 		if (ifconfig_err_ioctlreq(lifh) == SIOCIFDESTROY) {
70 			warnx(
71 				"Failed to destroy interface (SIOCIFDESTROY)\n");
72 		}
73 		break;
74 	default:
75 		warnx(
76 			"Should basically never end up here in this example.\n");
77 		break;
78 	}
79 
80 	ifconfig_close(lifh);
81 	lifh = NULL;
82 	free(ifname);
83 	return (-1);
84 }
85