1/*
2 * hostapd / VLAN ifconfig helpers
3 * Copyright 2003, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
6 *
7 * This software may be distributed under the terms of the BSD license.
8 * See README for more details.
9 */
10
11#include "utils/includes.h"
12#include <net/if.h>
13#include <sys/ioctl.h>
14
15#include "utils/common.h"
16#include "vlan_util.h"
17
18
19int ifconfig_helper(const char *if_name, int up)
20{
21	int fd;
22	struct ifreq ifr;
23
24	if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
25		wpa_printf(MSG_ERROR, "VLAN: %s: socket(AF_INET,SOCK_STREAM) "
26			   "failed: %s", __func__, strerror(errno));
27		return -1;
28	}
29
30	os_memset(&ifr, 0, sizeof(ifr));
31	os_strlcpy(ifr.ifr_name, if_name, IFNAMSIZ);
32
33	if (ioctl(fd, SIOCGIFFLAGS, &ifr) != 0) {
34		wpa_printf(MSG_ERROR, "VLAN: %s: ioctl(SIOCGIFFLAGS) failed "
35			   "for interface %s: %s",
36			   __func__, if_name, strerror(errno));
37		close(fd);
38		return -1;
39	}
40
41	if (up)
42		ifr.ifr_flags |= IFF_UP;
43	else
44		ifr.ifr_flags &= ~IFF_UP;
45
46	if (ioctl(fd, SIOCSIFFLAGS, &ifr) != 0) {
47		wpa_printf(MSG_ERROR, "VLAN: %s: ioctl(SIOCSIFFLAGS) failed "
48			   "for interface %s (up=%d): %s",
49			   __func__, if_name, up, strerror(errno));
50		close(fd);
51		return -1;
52	}
53
54	close(fd);
55	return 0;
56}
57
58
59int ifconfig_up(const char *if_name)
60{
61	wpa_printf(MSG_DEBUG, "VLAN: Set interface %s up", if_name);
62	return ifconfig_helper(if_name, 1);
63}
64
65
66int iface_exists(const char *ifname)
67{
68	return if_nametoindex(ifname);
69}
70