1/*
2 * Copyright (c) 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 <limits.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <string.h>
37#include <libifconfig.h>
38
39
40int
41main(int argc, char *argv[])
42{
43	char *parentif, *ifactualname;
44	unsigned short vlantag;
45	const char *errstr;
46	ifconfig_handle_t *lifh;
47
48	if (argc != 3) {
49		errx(EINVAL, "Invalid number of arguments."
50		    " Should provide exactly two arguments: "
51		    "PARENT_INTERFACE and VLAN_TAG.");
52	}
53
54	/* We have a static number of arguments. Therefore we can do it simple. */
55	parentif = strdup(argv[1]);
56	vlantag = strtonum(argv[2], 0, USHRT_MAX, &errstr);
57
58	if (errstr != NULL) {
59		errx(1, "VLAN_TAG must be between 0 and %i.\n", USHRT_MAX);
60	}
61
62	printf("Parent interface: %s\nVLAN tag: %i\n", parentif, vlantag);
63
64	lifh = ifconfig_open();
65	if (lifh == NULL) {
66		errx(ENOMEM, "Failed to open libifconfig handle.");
67		return (-1);
68	}
69
70	if (ifconfig_create_interface_vlan(lifh, "vlan", &ifactualname,
71	    parentif, vlantag) == 0) {
72		printf("Successfully created interface '%s'\n", ifactualname);
73		ifconfig_close(lifh);
74		lifh = NULL;
75		free(parentif);
76		free(ifactualname);
77		return (0);
78	}
79
80	switch (ifconfig_err_errtype(lifh)) {
81	case SOCKET:
82		warnx("couldn't create socket. This shouldn't happen.\n");
83		break;
84	case IOCTL:
85		if (ifconfig_err_ioctlreq(lifh) == SIOCIFCREATE2) {
86			warnx(
87				"Failed to create interface (SIOCIFCREATE2)\n");
88		}
89		break;
90	default:
91		warnx(
92			"This is a thorough example accommodating for temporary"
93			" 'not implemented yet' errors. That's likely what happened"
94			" now. If not, your guess is as good as mine. ;)"
95			" Error code: %d\n", ifconfig_err_errno(
96				lifh));
97		break;
98	}
99
100	ifconfig_close(lifh);
101	lifh = NULL;
102	free(parentif);
103	free(ifactualname);
104	return (-1);
105}
106