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
ifconfig_helper(const char * if_name,int up)19 int 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
ifconfig_up(const char * if_name)59 int 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
iface_exists(const char * ifname)66 int iface_exists(const char *ifname)
67 {
68 return if_nametoindex(ifname);
69 }
70