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 <arpa/inet.h>
28#include <net/if.h>
29
30#include <err.h>
31#include <errno.h>
32#include <stdio.h>
33#include <stdlib.h>
34#include <string.h>
35#include <libifconfig.h>
36
37
38int
39main(int argc, char *argv[])
40{
41	char *ifname, *ifdescr, *curdescr;
42	ifconfig_handle_t *lifh;
43
44	if (argc != 3) {
45		errx(EINVAL, "Invalid number of arguments."
46		    " First argument should be interface name, second argument"
47		    " should be the description to set.");
48	}
49
50	/* We have a static number of arguments. Therefore we can do it simple. */
51	ifname = strdup(argv[1]);
52	ifdescr = strdup(argv[2]);
53	curdescr = NULL;
54
55	printf("Interface name: %s\n", ifname);
56
57	lifh = ifconfig_open();
58	if (lifh == NULL) {
59		errx(ENOMEM, "Failed to open libifconfig handle.");
60		return (-1);
61	}
62
63	if (ifconfig_get_description(lifh, ifname, &curdescr) == 0) {
64		printf("Old description: %s\n", curdescr);
65	}
66
67	printf("New description: %s\n\n", ifdescr);
68
69	if (ifconfig_set_description(lifh, ifname, ifdescr) == 0) {
70		printf("New description successfully set.\n");
71	} else {
72		switch (ifconfig_err_errtype(lifh)) {
73		case SOCKET:
74			err(ifconfig_err_errno(lifh), "Socket error");
75			break;
76		case IOCTL:
77			err(ifconfig_err_errno(
78				    lifh), "IOCTL(%lu) error",
79			    ifconfig_err_ioctlreq(lifh));
80			break;
81		default:
82			err(ifconfig_err_errno(lifh), "Other error");
83			break;
84		}
85	}
86
87	free(ifname);
88	free(ifdescr);
89	free(curdescr);
90	ifname = NULL;
91	ifdescr = NULL;
92	curdescr = NULL;
93
94	ifconfig_close(lifh);
95	return (0);
96}
97