hostap/src/drivers/linux_ioctl.c
2010-01-03 22:17:08 +02:00

99 lines
2.2 KiB
C

/*
* Linux ioctl helper functions for driver wrappers
* Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "utils/includes.h"
#include <sys/ioctl.h>
#include <net/if.h>
#include <net/if_arp.h>
#include "utils/common.h"
#include "linux_ioctl.h"
int linux_set_iface_flags(int sock, const char *ifname, int dev_up)
{
struct ifreq ifr;
if (sock < 0)
return -1;
os_memset(&ifr, 0, sizeof(ifr));
os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
if (ioctl(sock, SIOCGIFFLAGS, &ifr) != 0) {
wpa_printf(MSG_ERROR, "Could not read interface %s flags: %s",
ifname, strerror(errno));
return -1;
}
if (dev_up) {
if (ifr.ifr_flags & IFF_UP)
return 0;
ifr.ifr_flags |= IFF_UP;
} else {
if (!(ifr.ifr_flags & IFF_UP))
return 0;
ifr.ifr_flags &= ~IFF_UP;
}
if (ioctl(sock, SIOCSIFFLAGS, &ifr) != 0) {
wpa_printf(MSG_ERROR, "Could not set interface %s flags: %s",
ifname, strerror(errno));
return -1;
}
return 0;
}
int linux_get_ifhwaddr(int sock, const char *ifname, u8 *addr)
{
struct ifreq ifr;
os_memset(&ifr, 0, sizeof(ifr));
os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
if (ioctl(sock, SIOCGIFHWADDR, &ifr)) {
wpa_printf(MSG_ERROR, "Could not get interface %s hwaddr: %s",
ifname, strerror(errno));
return -1;
}
if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
ifname, ifr.ifr_hwaddr.sa_family);
return -1;
}
os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
return 0;
}
int linux_set_ifhwaddr(int sock, const char *ifname, const u8 *addr)
{
struct ifreq ifr;
os_memset(&ifr, 0, sizeof(ifr));
os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
if (ioctl(sock, SIOCSIFHWADDR, &ifr)) {
wpa_printf(MSG_DEBUG, "Could not set interface %s hwaddr: %s",
ifname, strerror(errno));
return -1;
}
return 0;
}