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 * $FreeBSD$
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
39int
40main(int argc, char *argv[])
41{
42	char *ifname, *ifactualname;
43	ifconfig_handle_t *lifh;
44
45	if (argc != 2) {
46		errx(EINVAL, "Invalid number of arguments."
47		    " Only one argument is accepted, and it should be the name"
48		    " of the interface to be created.");
49	}
50
51	/* We have a static number of arguments. Therefore we can do it simple. */
52	ifname = strdup(argv[1]);
53
54	printf("Requested interface name: %s\n", ifname);
55
56	lifh = ifconfig_open();
57	if (lifh == NULL) {
58		errx(ENOMEM, "Failed to open libifconfig handle.");
59		return (-1);
60	}
61
62	if (ifconfig_create_interface(lifh, ifname, &ifactualname) == 0) {
63		printf("Successfully created interface '%s'\n", ifactualname);
64		ifconfig_close(lifh);
65		lifh = NULL;
66		free(ifname);
67		free(ifactualname);
68		return (0);
69	}
70
71	switch (ifconfig_err_errtype(lifh)) {
72	case SOCKET:
73		warnx("couldn't create socket. This shouldn't happen.\n");
74		break;
75	case IOCTL:
76		if (ifconfig_err_ioctlreq(lifh) == SIOCIFCREATE2) {
77			warnx(
78				"Failed to create interface (SIOCIFCREATE2)\n");
79		}
80		break;
81	default:
82		warnx(
83			"This is a thorough example accommodating for temporary"
84			" 'not implemented yet' errors. That's likely what happened"
85			" now. If not, your guess is as good as mine. ;)"
86			" Error code: %d\n", ifconfig_err_errno(
87				lifh));
88		break;
89	}
90
91	ifconfig_close(lifh);
92	lifh = NULL;
93	free(ifname);
94	free(ifactualname);
95	return (-1);
96}
97