hostap/src/drivers/driver_nl80211.c

/*
 * Driver interaction with Linux nl80211/cfg80211
 * Copyright (c) 2002-2012, Jouni Malinen <j@w1.fi>
 * Copyright (c) 2003-2004, Instant802 Networks, Inc.
 * Copyright (c) 2005-2006, Devicescape Software, Inc.
 * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
 * Copyright (c) 2009-2010, Atheros Communications
 *
 * This software may be distributed under the terms of the BSD license.
 * See README for more details.
 */

#include "includes.h"
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <net/if.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/family.h>
#include <netlink/genl/ctrl.h>
#include <linux/rtnetlink.h>
#include <netpacket/packet.h>
#include <linux/filter.h>
#include <linux/errqueue.h>
#include "nl80211_copy.h"

#include "common.h"
#include "eloop.h"
#include "utils/list.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "l2_packet/l2_packet.h"
#include "netlink.h"
#include "linux_ioctl.h"
#include "radiotap.h"
#include "radiotap_iter.h"
#include "rfkill.h"
#include "driver.h"

#ifndef SO_WIFI_STATUS
# if defined(__sparc__)
#  define SO_WIFI_STATUS	0x0025
# elif defined(__parisc__)
#  define SO_WIFI_STATUS	0x4022
# else
#  define SO_WIFI_STATUS	41
# endif

# define SCM_WIFI_STATUS	SO_WIFI_STATUS
#endif

#ifndef SO_EE_ORIGIN_TXSTATUS
#define SO_EE_ORIGIN_TXSTATUS	4
#endif

#ifndef PACKET_TX_TIMESTAMP
#define PACKET_TX_TIMESTAMP	16
#endif

#ifdef ANDROID
#include "android_drv.h"

/* system/core/libnl_2 in AOSP does not include nla_put_u32() */
int nla_put_u32(struct nl_msg *msg, int attrtype, uint32_t value)
{
	return nla_put(msg, attrtype, sizeof(uint32_t), &value);
}
#endif /* ANDROID */
#ifdef CONFIG_LIBNL20
/* libnl 2.0 compatibility code */
#define nl_handle nl_sock
#define nl80211_handle_alloc nl_socket_alloc_cb
#define nl80211_handle_destroy nl_socket_free
#else
/*
 * libnl 1.1 has a bug, it tries to allocate socket numbers densely
 * but when you free a socket again it will mess up its bitmap and
 * and use the wrong number the next time it needs a socket ID.
 * Therefore, we wrap the handle alloc/destroy and add our own pid
 * accounting.
 */
static uint32_t port_bitmap[32] = { 0 };

static struct nl_handle *nl80211_handle_alloc(void *cb)
{
	struct nl_handle *handle;
	uint32_t pid = getpid() & 0x3FFFFF;
	int i;

	handle = nl_handle_alloc_cb(cb);

	for (i = 0; i < 1024; i++) {
		if (port_bitmap[i / 32] & (1 << (i % 32)))
			continue;
		port_bitmap[i / 32] |= 1 << (i % 32);
		pid += i << 22;
		break;
	}

	nl_socket_set_local_port(handle, pid);

	return handle;
}

static void nl80211_handle_destroy(struct nl_handle *handle)
{
	uint32_t port = nl_socket_get_local_port(handle);

	port >>= 22;
	port_bitmap[port / 32] &= ~(1 << (port % 32));

	nl_handle_destroy(handle);
}
#endif /* CONFIG_LIBNL20 */


static struct nl_handle * nl_create_handle(struct nl_cb *cb, const char *dbg)
{
	struct nl_handle *handle;

	handle = nl80211_handle_alloc(cb);
	if (handle == NULL) {
		wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
			   "callbacks (%s)", dbg);
		return NULL;
	}

	if (genl_connect(handle)) {
		wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
			   "netlink (%s)", dbg);
		nl80211_handle_destroy(handle);
		return NULL;
	}

	return handle;
}


static void nl_destroy_handles(struct nl_handle **handle)
{
	if (*handle == NULL)
		return;
	nl80211_handle_destroy(*handle);
	*handle = NULL;
}


#ifndef IFF_LOWER_UP
#define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
#endif
#ifndef IFF_DORMANT
#define IFF_DORMANT    0x20000         /* driver signals dormant       */
#endif

#ifndef IF_OPER_DORMANT
#define IF_OPER_DORMANT 5
#endif
#ifndef IF_OPER_UP
#define IF_OPER_UP 6
#endif

struct nl80211_global {
	struct dl_list interfaces;
	int if_add_ifindex;
	struct netlink_data *netlink;
	struct nl_cb *nl_cb;
	struct nl_handle *nl;
	int nl80211_id;
	int ioctl_sock; /* socket for ioctl() use */

	struct nl_handle *nl_event;
};

struct nl80211_wiphy_data {
	struct dl_list list;
	struct dl_list bsss;
	struct dl_list drvs;

	struct nl_handle *nl_beacons;
	struct nl_cb *nl_cb;

	int wiphy_idx;
};

static void nl80211_global_deinit(void *priv);
static void wpa_driver_nl80211_deinit(void *priv);

struct i802_bss {
	struct wpa_driver_nl80211_data *drv;
	struct i802_bss *next;
	int ifindex;
	char ifname[IFNAMSIZ + 1];
	char brname[IFNAMSIZ];
	unsigned int beacon_set:1;
	unsigned int added_if_into_bridge:1;
	unsigned int added_bridge:1;
	unsigned int in_deinit:1;

	u8 addr[ETH_ALEN];

	int freq;

	void *ctx;
	struct nl_handle *nl_preq, *nl_mgmt;
	struct nl_cb *nl_cb;

	struct nl80211_wiphy_data *wiphy_data;
	struct dl_list wiphy_list;
};

struct wpa_driver_nl80211_data {
	struct nl80211_global *global;
	struct dl_list list;
	struct dl_list wiphy_list;
	char phyname[32];
	void *ctx;
	int ifindex;
	int if_removed;
	int if_disabled;
	int ignore_if_down_event;
	struct rfkill_data *rfkill;
	struct wpa_driver_capa capa;
	int has_capability;

	int operstate;

	int scan_complete_events;

	struct nl_cb *nl_cb;

	u8 auth_bssid[ETH_ALEN];
	u8 bssid[ETH_ALEN];
	int associated;
	u8 ssid[32];
	size_t ssid_len;
	enum nl80211_iftype nlmode;
	enum nl80211_iftype ap_scan_as_station;
	unsigned int assoc_freq;

	int monitor_sock;
	int monitor_ifidx;
	int monitor_refcount;

	unsigned int disabled_11b_rates:1;
	unsigned int pending_remain_on_chan:1;
	unsigned int in_interface_list:1;
	unsigned int device_ap_sme:1;
	unsigned int poll_command_supported:1;
	unsigned int data_tx_status:1;
	unsigned int scan_for_auth:1;
	unsigned int retry_auth:1;
	unsigned int use_monitor:1;
	unsigned int ignore_next_local_disconnect:1;

	u64 remain_on_chan_cookie;
	u64 send_action_cookie;

	unsigned int last_mgmt_freq;

	struct wpa_driver_scan_filter *filter_ssids;
	size_t num_filter_ssids;

	struct i802_bss first_bss;

	int eapol_tx_sock;

#ifdef HOSTAPD
	int eapol_sock; /* socket for EAPOL frames */

	int default_if_indices[16];
	int *if_indices;
	int num_if_indices;

	int last_freq;
	int last_freq_ht;
#endif /* HOSTAPD */

	/* From failed authentication command */
	int auth_freq;
	u8 auth_bssid_[ETH_ALEN];
	u8 auth_ssid[32];
	size_t auth_ssid_len;
	int auth_alg;
	u8 *auth_ie;
	size_t auth_ie_len;
	u8 auth_wep_key[4][16];
	size_t auth_wep_key_len[4];
	int auth_wep_tx_keyidx;
	int auth_local_state_change;
	int auth_p2p;
};


static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
					    void *timeout_ctx);
static int wpa_driver_nl80211_set_mode(struct i802_bss *bss,
				       enum nl80211_iftype nlmode);
static int
wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
				   const u8 *addr, int cmd, u16 reason_code,
				   int local_state_change);
static void nl80211_remove_monitor_interface(
	struct wpa_driver_nl80211_data *drv);
static int nl80211_send_frame_cmd(struct i802_bss *bss,
				  unsigned int freq, unsigned int wait,
				  const u8 *buf, size_t buf_len, u64 *cookie,
				  int no_cck, int no_ack, int offchanok);
static int wpa_driver_nl80211_probe_req_report(void *priv, int report);
#ifdef ANDROID
static int android_pno_start(struct i802_bss *bss,
			     struct wpa_driver_scan_params *params);
static int android_pno_stop(struct i802_bss *bss);
#endif /* ANDROID */

#ifdef HOSTAPD
static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
static int wpa_driver_nl80211_if_remove(void *priv,
					enum wpa_driver_if_type type,
					const char *ifname);
#else /* HOSTAPD */
static inline void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
{
}

static inline void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
{
}

static inline int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
{
	return 0;
}
#endif /* HOSTAPD */

static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
				     int ifindex, int disabled);

static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv);
static int wpa_driver_nl80211_authenticate_retry(
	struct wpa_driver_nl80211_data *drv);


static int is_ap_interface(enum nl80211_iftype nlmode)
{
	return (nlmode == NL80211_IFTYPE_AP ||
		nlmode == NL80211_IFTYPE_P2P_GO);
}


static int is_sta_interface(enum nl80211_iftype nlmode)
{
	return (nlmode == NL80211_IFTYPE_STATION ||
		nlmode == NL80211_IFTYPE_P2P_CLIENT);
}


static int is_p2p_interface(enum nl80211_iftype nlmode)
{
	return (nlmode == NL80211_IFTYPE_P2P_CLIENT ||
		nlmode == NL80211_IFTYPE_P2P_GO);
}


struct nl80211_bss_info_arg {
	struct wpa_driver_nl80211_data *drv;
	struct wpa_scan_results *res;
	unsigned int assoc_freq;
	u8 assoc_bssid[ETH_ALEN];
};

static int bss_info_handler(struct nl_msg *msg, void *arg);


/* nl80211 code */
static int ack_handler(struct nl_msg *msg, void *arg)
{
	int *err = arg;
	*err = 0;
	return NL_STOP;
}

static int finish_handler(struct nl_msg *msg, void *arg)
{
	int *ret = arg;
	*ret = 0;
	return NL_SKIP;
}

static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
			 void *arg)
{
	int *ret = arg;
	*ret = err->error;
	return NL_SKIP;
}


static int no_seq_check(struct nl_msg *msg, void *arg)
{
	return NL_OK;
}


static int send_and_recv(struct nl80211_global *global,
			 struct nl_handle *nl_handle, struct nl_msg *msg,
			 int (*valid_handler)(struct nl_msg *, void *),
			 void *valid_data)
{
	struct nl_cb *cb;
	int err = -ENOMEM;

	cb = nl_cb_clone(global->nl_cb);
	if (!cb)
		goto out;

	err = nl_send_auto_complete(nl_handle, msg);
	if (err < 0)
		goto out;

	err = 1;

	nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
	nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
	nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);

	if (valid_handler)
		nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
			  valid_handler, valid_data);

	while (err > 0)
		nl_recvmsgs(nl_handle, cb);
 out:
	nl_cb_put(cb);
	nlmsg_free(msg);
	return err;
}


static int send_and_recv_msgs_global(struct nl80211_global *global,
				     struct nl_msg *msg,
				     int (*valid_handler)(struct nl_msg *, void *),
				     void *valid_data)
{
	return send_and_recv(global, global->nl, msg, valid_handler,
			     valid_data);
}


static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
			      struct nl_msg *msg,
			      int (*valid_handler)(struct nl_msg *, void *),
			      void *valid_data)
{
	return send_and_recv(drv->global, drv->global->nl, msg,
			     valid_handler, valid_data);
}


struct family_data {
	const char *group;
	int id;
};


static int family_handler(struct nl_msg *msg, void *arg)
{
	struct family_data *res = arg;
	struct nlattr *tb[CTRL_ATTR_MAX + 1];
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct nlattr *mcgrp;
	int i;

	nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);
	if (!tb[CTRL_ATTR_MCAST_GROUPS])
		return NL_SKIP;

	nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
		struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
		nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
			  nla_len(mcgrp), NULL);
		if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
		    !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
		    os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
			       res->group,
			       nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
			continue;
		res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
		break;
	};

	return NL_SKIP;
}


static int nl_get_multicast_id(struct nl80211_global *global,
			       const char *family, const char *group)
{
	struct nl_msg *msg;
	int ret = -1;
	struct family_data res = { group, -ENOENT };

	msg = nlmsg_alloc();
	if (!msg)
		return -ENOMEM;
	genlmsg_put(msg, 0, 0, genl_ctrl_resolve(global->nl, "nlctrl"),
		    0, 0, CTRL_CMD_GETFAMILY, 0);
	NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);

	ret = send_and_recv_msgs_global(global, msg, family_handler, &res);
	msg = NULL;
	if (ret == 0)
		ret = res.id;

nla_put_failure:
	nlmsg_free(msg);
	return ret;
}


static void * nl80211_cmd(struct wpa_driver_nl80211_data *drv,
			  struct nl_msg *msg, int flags, uint8_t cmd)
{
	return genlmsg_put(msg, 0, 0, drv->global->nl80211_id,
			   0, flags, cmd, 0);
}


struct wiphy_idx_data {
	int wiphy_idx;
};


static int netdev_info_handler(struct nl_msg *msg, void *arg)
{
	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct wiphy_idx_data *info = arg;

	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);

	if (tb[NL80211_ATTR_WIPHY])
		info->wiphy_idx = nla_get_u32(tb[NL80211_ATTR_WIPHY]);

	return NL_SKIP;
}


static int nl80211_get_wiphy_index(struct i802_bss *bss)
{
	struct nl_msg *msg;
	struct wiphy_idx_data data = {
		.wiphy_idx = -1,
	};

	msg = nlmsg_alloc();
	if (!msg)
		return -1;

	nl80211_cmd(bss->drv, msg, 0, NL80211_CMD_GET_INTERFACE);

	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);

	if (send_and_recv_msgs(bss->drv, msg, netdev_info_handler, &data) == 0)
		return data.wiphy_idx;
	msg = NULL;
nla_put_failure:
	nlmsg_free(msg);
	return -1;
}


static int nl80211_register_beacons(struct wpa_driver_nl80211_data *drv,
				    struct nl80211_wiphy_data *w)
{
	struct nl_msg *msg;
	int ret = -1;

	msg = nlmsg_alloc();
	if (!msg)
		return -1;

	nl80211_cmd(drv, msg, 0, NL80211_CMD_REGISTER_BEACONS);

	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, w->wiphy_idx);

	ret = send_and_recv(drv->global, w->nl_beacons, msg, NULL, NULL);
	msg = NULL;
	if (ret) {
		wpa_printf(MSG_DEBUG, "nl80211: Register beacons command "
			   "failed: ret=%d (%s)",
			   ret, strerror(-ret));
		goto nla_put_failure;
	}
	ret = 0;
nla_put_failure:
	nlmsg_free(msg);
	return ret;
}


static void nl80211_recv_beacons(int sock, void *eloop_ctx, void *handle)
{
	struct nl80211_wiphy_data *w = eloop_ctx;

	wpa_printf(MSG_EXCESSIVE, "nl80211: Beacon event message available");

	nl_recvmsgs(handle, w->nl_cb);
}


static int process_beacon_event(struct nl_msg *msg, void *arg)
{
	struct nl80211_wiphy_data *w = arg;
	struct wpa_driver_nl80211_data *drv;
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	union wpa_event_data event;

	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);

	if (gnlh->cmd != NL80211_CMD_FRAME) {
		wpa_printf(MSG_DEBUG, "nl80211: Unexpected beacon event? (%d)",
			   gnlh->cmd);
		return NL_SKIP;
	}

	if (!tb[NL80211_ATTR_FRAME])
		return NL_SKIP;

	dl_list_for_each(drv, &w->drvs, struct wpa_driver_nl80211_data,
			 wiphy_list) {
		os_memset(&event, 0, sizeof(event));
		event.rx_mgmt.frame = nla_data(tb[NL80211_ATTR_FRAME]);
		event.rx_mgmt.frame_len = nla_len(tb[NL80211_ATTR_FRAME]);
		wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
	}

	return NL_SKIP;
}


static struct nl80211_wiphy_data *
nl80211_get_wiphy_data_ap(struct i802_bss *bss)
{
	static DEFINE_DL_LIST(nl80211_wiphys);
	struct nl80211_wiphy_data *w;
	int wiphy_idx, found = 0;
	struct i802_bss *tmp_bss;

	if (bss->wiphy_data != NULL)
		return bss->wiphy_data;

	wiphy_idx = nl80211_get_wiphy_index(bss);

	dl_list_for_each(w, &nl80211_wiphys, struct nl80211_wiphy_data, list) {
		if (w->wiphy_idx == wiphy_idx)
			goto add;
	}

	/* alloc new one */
	w = os_zalloc(sizeof(*w));
	if (w == NULL)
		return NULL;
	w->wiphy_idx = wiphy_idx;
	dl_list_init(&w->bsss);
	dl_list_init(&w->drvs);

	w->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
	if (!w->nl_cb) {
		os_free(w);
		return NULL;
	}
	nl_cb_set(w->nl_cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
	nl_cb_set(w->nl_cb, NL_CB_VALID, NL_CB_CUSTOM, process_beacon_event,
		  w);

	w->nl_beacons = nl_create_handle(bss->drv->global->nl_cb,
					 "wiphy beacons");
	if (w->nl_beacons == NULL) {
		os_free(w);
		return NULL;
	}

	if (nl80211_register_beacons(bss->drv, w)) {
		nl_destroy_handles(&w->nl_beacons);
		os_free(w);
		return NULL;
	}

	eloop_register_read_sock(nl_socket_get_fd(w->nl_beacons),
				 nl80211_recv_beacons, w, w->nl_beacons);

	dl_list_add(&nl80211_wiphys, &w->list);

add:
	/* drv entry for this bss already there? */
	dl_list_for_each(tmp_bss, &w->bsss, struct i802_bss, wiphy_list) {
		if (tmp_bss->drv == bss->drv) {
			found = 1;
			break;
		}
	}
	/* if not add it */
	if (!found)
		dl_list_add(&w->drvs, &bss->drv->wiphy_list);

	dl_list_add(&w->bsss, &bss->wiphy_list);
	bss->wiphy_data = w;
	return w;
}


static void nl80211_put_wiphy_data_ap(struct i802_bss *bss)
{
	struct nl80211_wiphy_data *w = bss->wiphy_data;
	struct i802_bss *tmp_bss;
	int found = 0;

	if (w == NULL)
		return;
	bss->wiphy_data = NULL;
	dl_list_del(&bss->wiphy_list);

	/* still any for this drv present? */
	dl_list_for_each(tmp_bss, &w->bsss, struct i802_bss, wiphy_list) {
		if (tmp_bss->drv == bss->drv) {
			found = 1;
			break;
		}
	}
	/* if not remove it */
	if (!found)
		dl_list_del(&bss->drv->wiphy_list);

	if (!dl_list_empty(&w->bsss))
		return;

	eloop_unregister_read_sock(nl_socket_get_fd(w->nl_beacons));

	nl_cb_put(w->nl_cb);
	nl_destroy_handles(&w->nl_beacons);
	dl_list_del(&w->list);
	os_free(w);
}


static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
{
	struct i802_bss *bss = priv;
	struct wpa_driver_nl80211_data *drv = bss->drv;
	if (!drv->associated)
		return -1;
	os_memcpy(bssid, drv->bssid, ETH_ALEN);
	return 0;
}


static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
{
	struct i802_bss *bss = priv;
	struct wpa_driver_nl80211_data *drv = bss->drv;
	if (!drv->associated)
		return -1;
	os_memcpy(ssid, drv->ssid, drv->ssid_len);
	return drv->ssid_len;
}


static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
					  char *buf, size_t len, int del)
{
	union wpa_event_data event;

	os_memset(&event, 0, sizeof(event));
	if (len > sizeof(event.interface_status.ifname))
		len = sizeof(event.interface_status.ifname) - 1;
	os_memcpy(event.interface_status.ifname, buf, len);
	event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
		EVENT_INTERFACE_ADDED;

	wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
		   del ? "DEL" : "NEW",
		   event.interface_status.ifname,
		   del ? "removed" : "added");

	if (os_strcmp(drv->first_bss.ifname, event.interface_status.ifname) == 0) {
		if (del) {
			if (drv->if_removed) {
				wpa_printf(MSG_DEBUG, "nl80211: if_removed "
					   "already set - ignore event");
				return;
			}
			drv->if_removed = 1;
		} else {
			if (if_nametoindex(drv->first_bss.ifname) == 0) {
				wpa_printf(MSG_DEBUG, "nl80211: Interface %s "
					   "does not exist - ignore "
					   "RTM_NEWLINK",
					   drv->first_bss.ifname);
				return;
			}
			if (!drv->if_removed) {
				wpa_printf(MSG_DEBUG, "nl80211: if_removed "
					   "already cleared - ignore event");
				return;
			}
			drv->if_removed = 0;
		}
	}

	wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
}


static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
					 u8 *buf, size_t len)
{
	int attrlen, rta_len;
	struct rtattr *attr;

	attrlen = len;
	attr = (struct rtattr *) buf;

	rta_len = RTA_ALIGN(sizeof(struct rtattr));
	while (RTA_OK(attr, attrlen)) {
		if (attr->rta_type == IFLA_IFNAME) {
			if (os_strcmp(((char *) attr) + rta_len, drv->first_bss.ifname)
			    == 0)
				return 1;
			else
				break;
		}
		attr = RTA_NEXT(attr, attrlen);
	}

	return 0;
}


static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
					  int ifindex, u8 *buf, size_t len)
{
	if (drv->ifindex == ifindex)
		return 1;

	if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
		drv->first_bss.ifindex = if_nametoindex(drv->first_bss.ifname);
		wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
			   "interface");
		wpa_driver_nl80211_finish_drv_init(drv);
		return 1;
	}

	return 0;
}


static struct wpa_driver_nl80211_data *
nl80211_find_drv(struct nl80211_global *global, int idx, u8 *buf, size_t len)
{
	struct wpa_driver_nl80211_data *drv;
	dl_list_for_each(drv, &global->interfaces,
			 struct wpa_driver_nl80211_data, list) {
		if (wpa_driver_nl80211_own_ifindex(drv, idx, buf, len) ||
		    have_ifidx(drv, idx))
			return drv;
	}
	return NULL;
}


static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
						 struct ifinfomsg *ifi,
						 u8 *buf, size_t len)
{
	struct nl80211_global *global = ctx;
	struct wpa_driver_nl80211_data *drv;
	int attrlen, rta_len;
	struct rtattr *attr;
	u32 brid = 0;
	char namebuf[IFNAMSIZ];

	drv = nl80211_find_drv(global, ifi->ifi_index, buf, len);
	if (!drv) {
		wpa_printf(MSG_DEBUG, "nl80211: Ignore event for foreign "
			   "ifindex %d", ifi->ifi_index);
		return;
	}

	wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
		   "(%s%s%s%s)",
		   drv->operstate, ifi->ifi_flags,
		   (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
		   (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
		   (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
		   (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");

	if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
		if (if_indextoname(ifi->ifi_index, namebuf) &&
		    linux_iface_up(drv->global->ioctl_sock,
				   drv->first_bss.ifname) > 0) {
			wpa_printf(MSG_DEBUG, "nl80211: Ignore interface down "
				   "event since interface %s is up", namebuf);
			return;
		}
		wpa_printf(MSG_DEBUG, "nl80211: Interface down");
		if (drv->ignore_if_down_event) {
			wpa_printf(MSG_DEBUG, "nl80211: Ignore interface down "
				   "event generated by mode change");
			drv->ignore_if_down_event = 0;
		} else {
			drv->if_disabled = 1;
			wpa_supplicant_event(drv->ctx,
					     EVENT_INTERFACE_DISABLED, NULL);
		}
	}

	if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
		if (if_indextoname(ifi->ifi_index, namebuf) &&
		    linux_iface_up(drv->global->ioctl_sock,
				   drv->first_bss.ifname) == 0) {
			wpa_printf(MSG_DEBUG, "nl80211: Ignore interface up "
				   "event since interface %s is down",
				   namebuf);
		} else if (if_nametoindex(drv->first_bss.ifname) == 0) {
			wpa_printf(MSG_DEBUG, "nl80211: Ignore interface up "
				   "event since interface %s does not exist",
				   drv->first_bss.ifname);
		} else if (drv->if_removed) {
			wpa_printf(MSG_DEBUG, "nl80211: Ignore interface up "
				   "event since interface %s is marked "
				   "removed", drv->first_bss.ifname);
		} else {
			wpa_printf(MSG_DEBUG, "nl80211: Interface up");
			drv->if_disabled = 0;
			wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED,
					     NULL);
		}
	}

	/*
	 * Some drivers send the association event before the operup event--in
	 * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
	 * fails. This will hit us when wpa_supplicant does not need to do
	 * IEEE 802.1X authentication
	 */
	if (drv->operstate == 1 &&
	    (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
	    !(ifi->ifi_flags & IFF_RUNNING))
		netlink_send_oper_ifla(drv->global->netlink, drv->ifindex,
				       -1, IF_OPER_UP);

	attrlen = len;
	attr = (struct rtattr *) buf;
	rta_len = RTA_ALIGN(sizeof(struct rtattr));
	while (RTA_OK(attr, attrlen)) {
		if (attr->rta_type == IFLA_IFNAME) {
			wpa_driver_nl80211_event_link(
				drv,
				((char *) attr) + rta_len,
				attr->rta_len - rta_len, 0);
		} else if (attr->rta_type == IFLA_MASTER)
			brid = nla_get_u32((struct nlattr *) attr);
		attr = RTA_NEXT(attr, attrlen);
	}

	if (ifi->ifi_family == AF_BRIDGE && brid) {
		/* device has been added to bridge */
		if_indextoname(brid, namebuf);
		wpa_printf(MSG_DEBUG, "nl80211: Add ifindex %u for bridge %s",
			   brid, namebuf);
		add_ifidx(drv, brid);
	}
}


static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
						 struct ifinfomsg *ifi,
						 u8 *buf, size_t len)
{
	struct nl80211_global *global = ctx;
	struct wpa_driver_nl80211_data *drv;
	int attrlen, rta_len;
	struct rtattr *attr;
	u32 brid = 0;

	drv = nl80211_find_drv(global, ifi->ifi_index, buf, len);
	if (!drv) {
		wpa_printf(MSG_DEBUG, "nl80211: Ignore dellink event for "
			   "foreign ifindex %d", ifi->ifi_index);
		return;
	}

	attrlen = len;
	attr = (struct rtattr *) buf;

	rta_len = RTA_ALIGN(sizeof(struct rtattr));
	while (RTA_OK(attr, attrlen)) {
		if (attr->rta_type == IFLA_IFNAME) {
			wpa_driver_nl80211_event_link(
				drv,
				((char *) attr) + rta_len,
				attr->rta_len - rta_len, 1);
		} else if (attr->rta_type == IFLA_MASTER)
			brid = nla_get_u32((struct nlattr *) attr);
		attr = RTA_NEXT(attr, attrlen);
	}

	if (ifi->ifi_family == AF_BRIDGE && brid) {
		/* device has been removed from bridge */
		char namebuf[IFNAMSIZ];
		if_indextoname(brid, namebuf);
		wpa_printf(MSG_DEBUG, "nl80211: Remove ifindex %u for bridge "
			   "%s", brid, namebuf);
		del_ifidx(drv, brid);
	}
}


static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
			    const u8 *frame, size_t len)
{
	const struct ieee80211_mgmt *mgmt;
	union wpa_event_data event;

	wpa_printf(MSG_DEBUG, "nl80211: Authenticate event");
	mgmt = (const struct ieee80211_mgmt *) frame;
	if (len < 24 + sizeof(mgmt->u.auth)) {
		wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
			   "frame");
		return;
	}

	os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
	os_memset(&event, 0, sizeof(event));
	os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
	event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
	event.auth.auth_transaction =
		le_to_host16(mgmt->u.auth.auth_transaction);
	event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
	if (len > 24 + sizeof(mgmt->u.auth)) {
		event.auth.ies = mgmt->u.auth.variable;
		event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
	}

	wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
}


static unsigned int nl80211_get_assoc_freq(struct wpa_driver_nl80211_data *drv)
{
	struct nl_msg *msg;
	int ret;
	struct nl80211_bss_info_arg arg;

	os_memset(&arg, 0, sizeof(arg));
	msg = nlmsg_alloc();
	if (!msg)
		goto nla_put_failure;

	nl80211_cmd(drv, msg, NLM_F_DUMP, NL80211_CMD_GET_SCAN);
	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);

	arg.drv = drv;
	ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
	msg = NULL;
	if (ret == 0) {
		wpa_printf(MSG_DEBUG, "nl80211: Operating frequency for the "
			   "associated BSS from scan results: %u MHz",
			   arg.assoc_freq);
		return arg.assoc_freq ? arg.assoc_freq : drv->assoc_freq;
	}
	wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
		   "(%s)", ret, strerror(-ret));
nla_put_failure:
	nlmsg_free(msg);
	return drv->assoc_freq;
}


static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
			    const u8 *frame, size_t len)
{
	const struct ieee80211_mgmt *mgmt;
	union wpa_event_data event;
	u16 status;

	wpa_printf(MSG_DEBUG, "nl80211: Associate event");
	mgmt = (const struct ieee80211_mgmt *) frame;
	if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
		wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
			   "frame");
		return;
	}

	status = le_to_host16(mgmt->u.assoc_resp.status_code);
	if (status != WLAN_STATUS_SUCCESS) {
		os_memset(&event, 0, sizeof(event));
		event.assoc_reject.bssid = mgmt->bssid;
		if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
			event.assoc_reject.resp_ies =
				(u8 *) mgmt->u.assoc_resp.variable;
			event.assoc_reject.resp_ies_len =
				len - 24 - sizeof(mgmt->u.assoc_resp);
		}
		event.assoc_reject.status_code = status;

		wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
		return;
	}

	drv->associated = 1;
	os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);

	os_memset(&event, 0, sizeof(event));
	if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
		event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
		event.assoc_info.resp_ies_len =
			len - 24 - sizeof(mgmt->u.assoc_resp);
	}

	event.assoc_info.freq = drv->assoc_freq;

	wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
}


static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
			       enum nl80211_commands cmd, struct nlattr *status,
			       struct nlattr *addr, struct nlattr *req_ie,
			       struct nlattr *resp_ie)
{
	union wpa_event_data event;

	if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
		/*
		 * Avoid reporting two association events that would confuse
		 * the core code.
		 */
		wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
			   "when using userspace SME", cmd);
		return;
	}

	if (cmd == NL80211_CMD_CONNECT)
		wpa_printf(MSG_DEBUG, "nl80211: Connect event");
	else if (cmd == NL80211_CMD_ROAM)
		wpa_printf(MSG_DEBUG, "nl80211: Roam event");

	os_memset(&event, 0, sizeof(event));
	if (cmd == NL80211_CMD_CONNECT &&
	    nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
		if (addr)
			event.assoc_reject.bssid = nla_data(addr);
		if (resp_ie) {
			event.assoc_reject.resp_ies = nla_data(resp_ie);
			event.assoc_reject.resp_ies_len = nla_len(resp_ie);
		}
		event.assoc_reject.status_code = nla_get_u16(status);
		wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
		return;
	}

	drv->associated = 1;
	if (addr)
		os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);

	if (req_ie) {
		event.assoc_info.req_ies = nla_data(req_ie);
		event.assoc_info.req_ies_len = nla_len(req_ie);
	}
	if (resp_ie) {
		event.assoc_info.resp_ies = nla_data(resp_ie);
		event.assoc_info.resp_ies_len = nla_len(resp_ie);
	}

	event.assoc_info.freq = nl80211_get_assoc_freq(drv);

	wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
}


static void mlme_event_disconnect(struct wpa_driver_nl80211_data *drv,
				  struct nlattr *reason, struct nlattr *addr,
				  struct nlattr *by_ap)
{
	union wpa_event_data data;
	unsigned int locally_generated = by_ap == NULL;

	if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
		/*
		 * Avoid reporting two disassociation events that could
		 * confuse the core code.
		 */
		wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
			   "event when using userspace SME");
		return;
	}

	if (drv->ignore_next_local_disconnect) {
		drv->ignore_next_local_disconnect = 0;
		if (locally_generated) {
			wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
				   "event triggered during reassociation");
			return;
		}
		wpa_printf(MSG_WARNING, "nl80211: Was expecting local "
			   "disconnect but got another disconnect "
			   "event first");
	}

	wpa_printf(MSG_DEBUG, "nl80211: Disconnect event");
	drv->associated = 0;
	os_memset(&data, 0, sizeof(data));
	if (reason)
		data.deauth_info.reason_code = nla_get_u16(reason);
	data.deauth_info.locally_generated = by_ap == NULL;
	wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, &data);
}


static void mlme_event_ch_switch(struct wpa_driver_nl80211_data *drv,
				 struct nlattr *freq, struct nlattr *type,
				 enum wpa_event_type event)
{
	union wpa_event_data data;
	int ht_enabled = 1;
	int chan_offset = 0;

	wpa_printf(MSG_INFO, "nl80211: Channel switch event");

	if (!freq || !type)
		return;

	switch (nla_get_u32(type)) {
	case NL80211_CHAN_NO_HT:
		ht_enabled = 0;
		break;
	case NL80211_CHAN_HT20:
		break;
	case NL80211_CHAN_HT40PLUS:
		chan_offset = 1;
		break;
	case NL80211_CHAN_HT40MINUS:
		chan_offset = -1;
		break;
	}

	data.ch_switch.freq = nla_get_u32(freq);
	data.ch_switch.ht_enabled = ht_enabled;
	data.ch_switch.ch_offset = chan_offset;

	wpa_supplicant_event(drv->ctx, event, &data);
}


static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
			       enum nl80211_commands cmd, struct nlattr *addr)
{
	union wpa_event_data event;
	enum wpa_event_type ev;

	if (nla_len(addr) != ETH_ALEN)
		return;

	wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
		   cmd, MAC2STR((u8 *) nla_data(addr)));

	if (cmd == NL80211_CMD_AUTHENTICATE)
		ev = EVENT_AUTH_TIMED_OUT;
	else if (cmd == NL80211_CMD_ASSOCIATE)
		ev = EVENT_ASSOC_TIMED_OUT;
	else
		return;

	os_memset(&event, 0, sizeof(event));
	os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
	wpa_supplicant_event(drv->ctx, ev, &event);
}


static void mlme_event_mgmt(struct wpa_driver_nl80211_data *drv,
			    struct nlattr *freq, struct nlattr *sig,
			    const u8 *frame, size_t len)
{
	const struct ieee80211_mgmt *mgmt;
	union wpa_event_data event;
	u16 fc, stype;
	int ssi_signal = 0;

	wpa_printf(MSG_DEBUG, "nl80211: Frame event");
	mgmt = (const struct ieee80211_mgmt *) frame;
	if (len < 24) {
		wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
		return;
	}

	fc = le_to_host16(mgmt->frame_control);
	stype = WLAN_FC_GET_STYPE(fc);

	if (sig)
		ssi_signal = (s32) nla_get_u32(sig);

	os_memset(&event, 0, sizeof(event));
	if (freq) {
		event.rx_action.freq = nla_get_u32(freq);
		drv->last_mgmt_freq = event.rx_action.freq;
	}
	if (stype == WLAN_FC_STYPE_ACTION) {
		event.rx_action.da = mgmt->da;
		event.rx_action.sa = mgmt->sa;
		event.rx_action.bssid = mgmt->bssid;
		event.rx_action.category = mgmt->u.action.category;
		event.rx_action.data = &mgmt->u.action.category + 1;
		event.rx_action.len = frame + len - event.rx_action.data;
		wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
	} else {
		event.rx_mgmt.frame = frame;
		event.rx_mgmt.frame_len = len;
		event.rx_mgmt.ssi_signal = ssi_signal;
		wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
	}
}


static void mlme_event_mgmt_tx_status(struct wpa_driver_nl80211_data *drv,
				      struct nlattr *cookie, const u8 *frame,
				      size_t len, struct nlattr *ack)
{
	union wpa_event_data event;
	const struct ieee80211_hdr *hdr;
	u16 fc;

	wpa_printf(MSG_DEBUG, "nl80211: Frame TX status event");
	if (!is_ap_interface(drv->nlmode)) {
		u64 cookie_val;

		if (!cookie)
			return;

		cookie_val = nla_get_u64(cookie);
		wpa_printf(MSG_DEBUG, "nl80211: Action TX status:"
			   " cookie=0%llx%s (ack=%d)",
			   (long long unsigned int) cookie_val,
			   cookie_val == drv->send_action_cookie ?
			   " (match)" : " (unknown)", ack != NULL);
		if (cookie_val != drv->send_action_cookie)
			return;
	}

	hdr = (const struct ieee80211_hdr *) frame;
	fc = le_to_host16(hdr->frame_control);

	os_memset(&event, 0, sizeof(event));
	event.tx_status.type = WLAN_FC_GET_TYPE(fc);
	event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
	event.tx_status.dst = hdr->addr1;
	event.tx_status.data = frame;
	event.tx_status.data_len = len;
	event.tx_status.ack = ack != NULL;
	wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
}


static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
				       enum wpa_event_type type,
				       const u8 *frame, size_t len)
{
	const struct ieee80211_mgmt *mgmt;
	union wpa_event_data event;
	const u8 *bssid = NULL;
	u16 reason_code = 0;

	if (type == EVENT_DEAUTH)
		wpa_printf(MSG_DEBUG, "nl80211: Deauthenticate event");
	else
		wpa_printf(MSG_DEBUG, "nl80211: Disassociate event");

	mgmt = (const struct ieee80211_mgmt *) frame;
	if (len >= 24) {
		bssid = mgmt->bssid;

		if (drv->associated != 0 &&
		    os_memcmp(bssid, drv->bssid, ETH_ALEN) != 0 &&
		    os_memcmp(bssid, drv->auth_bssid, ETH_ALEN) != 0) {
			/*
			 * We have presumably received this deauth as a
			 * response to a clear_state_mismatch() outgoing
			 * deauth.  Don't let it take us offline!
			 */
			wpa_printf(MSG_DEBUG, "nl80211: Deauth received "
				   "from Unknown BSSID " MACSTR " -- ignoring",
				   MAC2STR(bssid));
			return;
		}
	}

	drv->associated = 0;
	os_memset(&event, 0, sizeof(event));

	/* Note: Same offset for Reason Code in both frame subtypes */
	if (len >= 24 + sizeof(mgmt->u.deauth))
		reason_code = le_to_host16(mgmt->u.deauth.reason_code);

	if (type == EVENT_DISASSOC) {
		event.disassoc_info.locally_generated =
			!os_memcmp(mgmt->sa, drv->first_bss.addr, ETH_ALEN);
		event.disassoc_info.addr = bssid;
		event.disassoc_info.reason_code = reason_code;
		if (frame + len > mgmt->u.disassoc.variable) {
			event.disassoc_info.ie = mgmt->u.disassoc.variable;
			event.disassoc_info.ie_len = frame + len -
				mgmt->u.disassoc.variable;
		}
	} else {
		event.deauth_info.locally_generated =
			!os_memcmp(mgmt->sa, drv->first_bss.addr, ETH_ALEN);
		event.deauth_info.addr = bssid;
		event.deauth_info.reason_code = reason_code;
		if (frame + len > mgmt->u.deauth.variable) {
			event.deauth_info.ie = mgmt->u.deauth.variable;
			event.deauth_info.ie_len = frame + len -
				mgmt->u.deauth.variable;
		}
	}

	wpa_supplicant_event(drv->ctx, type, &event);
}


static void mlme_event_unprot_disconnect(struct wpa_driver_nl80211_data *drv,
					 enum wpa_event_type type,
					 const u8 *frame, size_t len)
{
	const struct ieee80211_mgmt *mgmt;
	union wpa_event_data event;
	u16 reason_code = 0;

	if (type == EVENT_UNPROT_DEAUTH)
		wpa_printf(MSG_DEBUG, "nl80211: Unprot Deauthenticate event");
	else
		wpa_printf(MSG_DEBUG, "nl80211: Unprot Disassociate event");

	if (len < 24)
		return;

	mgmt = (const struct ieee80211_mgmt *) frame;

	os_memset(&event, 0, sizeof(event));
	/* Note: Same offset for Reason Code in both frame subtypes */
	if (len >= 24 + sizeof(mgmt->u.deauth))
		reason_code = le_to_host16(mgmt->u.deauth.reason_code);

	if (type == EVENT_UNPROT_DISASSOC) {
		event.unprot_disassoc.sa = mgmt->sa;
		event.unprot_disassoc.da = mgmt->da;
		event.unprot_disassoc.reason_code = reason_code;
	} else {
		event.unprot_deauth.sa = mgmt->sa;
		event.unprot_deauth.da = mgmt->da;
		event.unprot_deauth.reason_code = reason_code;
	}

	wpa_supplicant_event(drv->ctx, type, &event);
}


static void mlme_event(struct wpa_driver_nl80211_data *drv,
		       enum nl80211_commands cmd, struct nlattr *frame,
		       struct nlattr *addr, struct nlattr *timed_out,
		       struct nlattr *freq, struct nlattr *ack,
		       struct nlattr *cookie, struct nlattr *sig)
{
	if (timed_out && addr) {
		mlme_timeout_event(drv, cmd, addr);
		return;
	}

	if (frame == NULL) {
		wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
			   "data", cmd);
		return;
	}

	wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
	wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
		    nla_data(frame), nla_len(frame));

	switch (cmd) {
	case NL80211_CMD_AUTHENTICATE:
		mlme_event_auth(drv, nla_data(frame), nla_len(frame));
		break;
	case NL80211_CMD_ASSOCIATE:
		mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
		break;
	case NL80211_CMD_DEAUTHENTICATE:
		mlme_event_deauth_disassoc(drv, EVENT_DEAUTH,
					   nla_data(frame), nla_len(frame));
		break;
	case NL80211_CMD_DISASSOCIATE:
		mlme_event_deauth_disassoc(drv, EVENT_DISASSOC,
					   nla_data(frame), nla_len(frame));
		break;
	case NL80211_CMD_FRAME:
		mlme_event_mgmt(drv, freq, sig, nla_data(frame),
				nla_len(frame));
		break;
	case NL80211_CMD_FRAME_TX_STATUS:
		mlme_event_mgmt_tx_status(drv, cookie, nla_data(frame),
					  nla_len(frame), ack);
		break;
	case NL80211_CMD_UNPROT_DEAUTHENTICATE:
		mlme_event_unprot_disconnect(drv, EVENT_UNPROT_DEAUTH,
					     nla_data(frame), nla_len(frame));
		break;
	case NL80211_CMD_UNPROT_DISASSOCIATE:
		mlme_event_unprot_disconnect(drv, EVENT_UNPROT_DISASSOC,
					     nla_data(frame), nla_len(frame));
		break;
	default:
		break;
	}
}


static void mlme_event_michael_mic_failure(struct i802_bss *bss,
					   struct nlattr *tb[])
{
	union wpa_event_data data;

	wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
	os_memset(&data, 0, sizeof(data));
	if (tb[NL80211_ATTR_MAC]) {
		wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
			    nla_data(tb[NL80211_ATTR_MAC]),
			    nla_len(tb[NL80211_ATTR_MAC]));
		data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
	}
	if (tb[NL80211_ATTR_KEY_SEQ]) {
		wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
			    nla_data(tb[NL80211_ATTR_KEY_SEQ]),
			    nla_len(tb[NL80211_ATTR_KEY_SEQ]));
	}
	if (tb[NL80211_ATTR_KEY_TYPE]) {
		enum nl80211_key_type key_type =
			nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
		wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
		if (key_type == NL80211_KEYTYPE_PAIRWISE)
			data.michael_mic_failure.unicast = 1;
	} else
		data.michael_mic_failure.unicast = 1;

	if (tb[NL80211_ATTR_KEY_IDX]) {
		u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
		wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
	}

	wpa_supplicant_event(bss->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
}


static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
				 struct nlattr *tb[])
{
	if (tb[NL80211_ATTR_MAC] == NULL) {
		wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
			   "event");
		return;
	}
	os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
	drv->associated = 1;
	wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
		   MAC2STR(drv->bssid));

	wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
}


static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
					 int cancel_event, struct nlattr *tb[])
{
	unsigned int freq, chan_type, duration;
	union wpa_event_data data;
	u64 cookie;

	if (tb[NL80211_ATTR_WIPHY_FREQ])
		freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
	else
		freq = 0;

	if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
		chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
	else
		chan_type = 0;

	if (tb[NL80211_ATTR_DURATION])
		duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
	else
		duration = 0;

	if (tb[NL80211_ATTR_COOKIE])
		cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
	else
		cookie = 0;

	wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
		   "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
		   cancel_event, freq, chan_type, duration,
		   (long long unsigned int) cookie,
		   cookie == drv->remain_on_chan_cookie ? "match" : "unknown");

	if (cookie != drv->remain_on_chan_cookie)
		return; /* not for us */

	if (cancel_event)
		drv->pending_remain_on_chan = 0;

	os_memset(&data, 0, sizeof(data));
	data.remain_on_channel.freq = freq;
	data.remain_on_channel.duration = duration;
	wpa_supplicant_event(drv->ctx, cancel_event ?
			     EVENT_CANCEL_REMAIN_ON_CHANNEL :
			     EVENT_REMAIN_ON_CHANNEL, &data);
}


static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
			    struct nlattr *tb[])
{
	union wpa_event_data event;
	struct nlattr *nl;
	int rem;
	struct scan_info *info;
#define MAX_REPORT_FREQS 50
	int freqs[MAX_REPORT_FREQS];
	int num_freqs = 0;

	if (drv->scan_for_auth) {
		drv->scan_for_auth = 0;
		wpa_printf(MSG_DEBUG, "nl80211: Scan results for missing "
			   "cfg80211 BSS entry");
		wpa_driver_nl80211_authenticate_retry(drv);
		return;
	}

	os_memset(&event, 0, sizeof(event));
	info = &event.scan_info;
	info->aborted = aborted;

	if (tb[NL80211_ATTR_SCAN_SSIDS]) {
		nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
			struct wpa_driver_scan_ssid *s =
				&info->ssids[info->num_ssids];
			s->ssid = nla_data(nl);
			s->ssid_len = nla_len(nl);
			info->num_ssids++;
			if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
				break;
		}
	}
	if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
		nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
		{
			freqs[num_freqs] = nla_get_u32(nl);
			num_freqs++;
			if (num_freqs == MAX_REPORT_FREQS - 1)
				break;
		}
		info->freqs = freqs;
		info->num_freqs = num_freqs;
	}
	wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
}


static int get_link_signal(struct nl_msg *msg, void *arg)
{
	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
	static struct nla_policy policy[NL80211_STA_INFO_MAX + 1] = {
		[NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
	};
	struct nlattr *rinfo[NL80211_RATE_INFO_MAX + 1];
	static struct nla_policy rate_policy[NL80211_RATE_INFO_MAX + 1] = {
		[NL80211_RATE_INFO_BITRATE] = { .type = NLA_U16 },
		[NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
		[NL80211_RATE_INFO_40_MHZ_WIDTH] = { .type = NLA_FLAG },
		[NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
	};
	struct wpa_signal_info *sig_change = arg;

	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);
	if (!tb[NL80211_ATTR_STA_INFO] ||
	    nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
			     tb[NL80211_ATTR_STA_INFO], policy))
		return NL_SKIP;
	if (!sinfo[NL80211_STA_INFO_SIGNAL])
		return NL_SKIP;

	sig_change->current_signal =
		(s8) nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);

	if (sinfo[NL80211_STA_INFO_TX_BITRATE]) {
		if (nla_parse_nested(rinfo, NL80211_RATE_INFO_MAX,
				     sinfo[NL80211_STA_INFO_TX_BITRATE],
				     rate_policy)) {
			sig_change->current_txrate = 0;
		} else {
			if (rinfo[NL80211_RATE_INFO_BITRATE]) {
				sig_change->current_txrate =
					nla_get_u16(rinfo[
					     NL80211_RATE_INFO_BITRATE]) * 100;
			}
		}
	}

	return NL_SKIP;
}


static int nl80211_get_link_signal(struct wpa_driver_nl80211_data *drv,
				   struct wpa_signal_info *sig)
{
	struct nl_msg *msg;

	sig->current_signal = -9999;
	sig->current_txrate = 0;

	msg = nlmsg_alloc();
	if (!msg)
		return -ENOMEM;

	nl80211_cmd(drv, msg, 0, NL80211_CMD_GET_STATION);

	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
	NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);

	return send_and_recv_msgs(drv, msg, get_link_signal, sig);
 nla_put_failure:
	nlmsg_free(msg);
	return -ENOBUFS;
}


static int get_link_noise(struct nl_msg *msg, void *arg)
{
	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
	static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
		[NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
		[NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
	};
	struct wpa_signal_info *sig_change = arg;

	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);

	if (!tb[NL80211_ATTR_SURVEY_INFO]) {
		wpa_printf(MSG_DEBUG, "nl80211: survey data missing!");
		return NL_SKIP;
	}

	if (nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
			     tb[NL80211_ATTR_SURVEY_INFO],
			     survey_policy)) {
		wpa_printf(MSG_DEBUG, "nl80211: failed to parse nested "
			   "attributes!");
		return NL_SKIP;
	}

	if (!sinfo[NL80211_SURVEY_INFO_FREQUENCY])
		return NL_SKIP;

	if (nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]) !=
	    sig_change->frequency)
		return NL_SKIP;

	if (!sinfo[NL80211_SURVEY_INFO_NOISE])
		return NL_SKIP;

	sig_change->current_noise =
		(s8) nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);

	return NL_SKIP;
}


static int nl80211_get_link_noise(struct wpa_driver_nl80211_data *drv,
				  struct wpa_signal_info *sig_change)
{
	struct nl_msg *msg;

	sig_change->current_noise = 9999;
	sig_change->frequency = drv->assoc_freq;

	msg = nlmsg_alloc();
	if (!msg)
		return -ENOMEM;

	nl80211_cmd(drv, msg, NLM_F_DUMP, NL80211_CMD_GET_SURVEY);

	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);

	return send_and_recv_msgs(drv, msg, get_link_noise, sig_change);
 nla_put_failure:
	nlmsg_free(msg);
	return -ENOBUFS;
}


static int get_noise_for_scan_results(struct nl_msg *msg, void *arg)
{
	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct nlattr *sinfo[NL80211_SURVEY_INFO_MAX + 1];
	static struct nla_policy survey_policy[NL80211_SURVEY_INFO_MAX + 1] = {
		[NL80211_SURVEY_INFO_FREQUENCY] = { .type = NLA_U32 },
		[NL80211_SURVEY_INFO_NOISE] = { .type = NLA_U8 },
	};
	struct wpa_scan_results *scan_results = arg;
	struct wpa_scan_res *scan_res;
	size_t i;

	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);

	if (!tb[NL80211_ATTR_SURVEY_INFO]) {
		wpa_printf(MSG_DEBUG, "nl80211: Survey data missing");
		return NL_SKIP;
	}

	if (nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
			     tb[NL80211_ATTR_SURVEY_INFO],
			     survey_policy)) {
		wpa_printf(MSG_DEBUG, "nl80211: Failed to parse nested "
			   "attributes");
		return NL_SKIP;
	}

	if (!sinfo[NL80211_SURVEY_INFO_NOISE])
		return NL_SKIP;

	if (!sinfo[NL80211_SURVEY_INFO_FREQUENCY])
		return NL_SKIP;

	for (i = 0; i < scan_results->num; ++i) {
		scan_res = scan_results->res[i];
		if (!scan_res)
			continue;
		if ((int) nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]) !=
		    scan_res->freq)
			continue;
		if (!(scan_res->flags & WPA_SCAN_NOISE_INVALID))
			continue;
		scan_res->noise = (s8)
			nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
		scan_res->flags &= ~WPA_SCAN_NOISE_INVALID;
	}

	return NL_SKIP;
}


static int nl80211_get_noise_for_scan_results(
	struct wpa_driver_nl80211_data *drv,
	struct wpa_scan_results *scan_res)
{
	struct nl_msg *msg;

	msg = nlmsg_alloc();
	if (!msg)
		return -ENOMEM;

	nl80211_cmd(drv, msg, NLM_F_DUMP, NL80211_CMD_GET_SURVEY);

	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);

	return send_and_recv_msgs(drv, msg, get_noise_for_scan_results,
				  scan_res);
 nla_put_failure:
	nlmsg_free(msg);
	return -ENOBUFS;
}


static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
			      struct nlattr *tb[])
{
	static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
		[NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
		[NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U8 },
		[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
		[NL80211_ATTR_CQM_PKT_LOSS_EVENT] = { .type = NLA_U32 },
	};
	struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
	enum nl80211_cqm_rssi_threshold_event event;
	union wpa_event_data ed;
	struct wpa_signal_info sig;
	int res;

	if (tb[NL80211_ATTR_CQM] == NULL ||
	    nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, tb[NL80211_ATTR_CQM],
			     cqm_policy)) {
		wpa_printf(MSG_DEBUG, "nl80211: Ignore invalid CQM event");
		return;
	}

	os_memset(&ed, 0, sizeof(ed));

	if (cqm[NL80211_ATTR_CQM_PKT_LOSS_EVENT]) {
		if (!tb[NL80211_ATTR_MAC])
			return;
		os_memcpy(ed.low_ack.addr, nla_data(tb[NL80211_ATTR_MAC]),
			  ETH_ALEN);
		wpa_supplicant_event(drv->ctx, EVENT_STATION_LOW_ACK, &ed);
		return;
	}

	if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] == NULL)
		return;
	event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);

	if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH) {
		wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
			   "event: RSSI high");
		ed.signal_change.above_threshold = 1;
	} else if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) {
		wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
			   "event: RSSI low");
		ed.signal_change.above_threshold = 0;
	} else
		return;

	res = nl80211_get_link_signal(drv, &sig);
	if (res == 0) {
		ed.signal_change.current_signal = sig.current_signal;
		ed.signal_change.current_txrate = sig.current_txrate;
		wpa_printf(MSG_DEBUG, "nl80211: Signal: %d dBm  txrate: %d",
			   sig.current_signal, sig.current_txrate);
	}

	res = nl80211_get_link_noise(drv, &sig);
	if (res == 0) {
		ed.signal_change.current_noise = sig.current_noise;
		wpa_printf(MSG_DEBUG, "nl80211: Noise: %d dBm",
			   sig.current_noise);
	}

	wpa_supplicant_event(drv->ctx, EVENT_SIGNAL_CHANGE, &ed);
}

static void nl80211_roaming_support_event(struct wpa_driver_nl80211_data *drv,
					  struct nlattr *tb[])
{
	int enabled;
	enum wpa_event_type event;

	enabled = (tb[NL80211_ATTR_ROAMING_DISABLED] == NULL);

	if (enabled)
		event = EVENT_ROAMING_ENABLED;
	else
		event = EVENT_ROAMING_DISABLED;

	wpa_printf(MSG_DEBUG, "nl80211: roaming %s",
		   enabled ? "enabled" : "disabled");

	wpa_supplicant_event(drv->ctx, event, NULL);
}

static void nl80211_new_station_event(struct wpa_driver_nl80211_data *drv,
				      struct nlattr **tb)
{
	u8 *addr;
	union wpa_event_data data;

	if (tb[NL80211_ATTR_MAC] == NULL)
		return;
	addr = nla_data(tb[NL80211_ATTR_MAC]);
	wpa_printf(MSG_DEBUG, "nl80211: New station " MACSTR, MAC2STR(addr));

	if (is_ap_interface(drv->nlmode) && drv->device_ap_sme) {
		u8 *ies = NULL;
		size_t ies_len = 0;
		if (tb[NL80211_ATTR_IE]) {
			ies = nla_data(tb[NL80211_ATTR_IE]);
			ies_len = nla_len(tb[NL80211_ATTR_IE]);
		}
		wpa_hexdump(MSG_DEBUG, "nl80211: Assoc Req IEs", ies, ies_len);
		drv_event_assoc(drv->ctx, addr, ies, ies_len, 0);
		return;
	}

	if (drv->nlmode != NL80211_IFTYPE_ADHOC)
		return;

	os_memset(&data, 0, sizeof(data));
	os_memcpy(data.ibss_rsn_start.peer, addr, ETH_ALEN);
	wpa_supplicant_event(drv->ctx, EVENT_IBSS_RSN_START, &data);
}


static void nl80211_del_station_event(struct wpa_driver_nl80211_data *drv,
				      struct nlattr **tb)
{
	u8 *addr;
	union wpa_event_data data;

	if (tb[NL80211_ATTR_MAC] == NULL)
		return;
	addr = nla_data(tb[NL80211_ATTR_MAC]);
	wpa_printf(MSG_DEBUG, "nl80211: Delete station " MACSTR,
		   MAC2STR(addr));

	if (is_ap_interface(drv->nlmode) && drv->device_ap_sme) {
		drv_event_disassoc(drv->ctx, addr);
		return;
	}

	if (drv->nlmode != NL80211_IFTYPE_ADHOC)
		return;

	os_memset(&data, 0, sizeof(data));
	os_memcpy(data.ibss_peer_lost.peer, addr, ETH_ALEN);
	wpa_supplicant_event(drv->ctx, EVENT_IBSS_PEER_LOST, &data);
}


static void nl80211_rekey_offload_event(struct wpa_driver_nl80211_data *drv,
					struct nlattr **tb)
{
	struct nlattr *rekey_info[NUM_NL80211_REKEY_DATA];
	static struct nla_policy rekey_policy[NUM_NL80211_REKEY_DATA] = {
		[NL80211_REKEY_DATA_KEK] = {
			.minlen = NL80211_KEK_LEN,
			.maxlen = NL80211_KEK_LEN,
		},
		[NL80211_REKEY_DATA_KCK] = {
			.minlen = NL80211_KCK_LEN,
			.maxlen = NL80211_KCK_LEN,
		},
		[NL80211_REKEY_DATA_REPLAY_CTR] = {
			.minlen = NL80211_REPLAY_CTR_LEN,
			.maxlen = NL80211_REPLAY_CTR_LEN,
		},
	};
	union wpa_event_data data;

	if (!tb[NL80211_ATTR_MAC])
		return;
	if (!tb[NL80211_ATTR_REKEY_DATA])
		return;
	if (nla_parse_nested(rekey_info, MAX_NL80211_REKEY_DATA,
			     tb[NL80211_ATTR_REKEY_DATA], rekey_policy))
		return;
	if (!rekey_info[NL80211_REKEY_DATA_REPLAY_CTR])
		return;

	os_memset(&data, 0, sizeof(data));
	data.driver_gtk_rekey.bssid = nla_data(tb[NL80211_ATTR_MAC]);
	wpa_printf(MSG_DEBUG, "nl80211: Rekey offload event for BSSID " MACSTR,
		   MAC2STR(data.driver_gtk_rekey.bssid));
	data.driver_gtk_rekey.replay_ctr =
		nla_data(rekey_info[NL80211_REKEY_DATA_REPLAY_CTR]);
	wpa_hexdump(MSG_DEBUG, "nl80211: Rekey offload - Replay Counter",
		    data.driver_gtk_rekey.replay_ctr, NL80211_REPLAY_CTR_LEN);
	wpa_supplicant_event(drv->ctx, EVENT_DRIVER_GTK_REKEY, &data);
}


static void nl80211_pmksa_candidate_event(struct wpa_driver_nl80211_data *drv,
					  struct nlattr **tb)
{
	struct nlattr *cand[NUM_NL80211_PMKSA_CANDIDATE];
	static struct nla_policy cand_policy[NUM_NL80211_PMKSA_CANDIDATE] = {
		[NL80211_PMKSA_CANDIDATE_INDEX] = { .type = NLA_U32 },
		[NL80211_PMKSA_CANDIDATE_BSSID] = {
			.minlen = ETH_ALEN,
			.maxlen = ETH_ALEN,
		},
		[NL80211_PMKSA_CANDIDATE_PREAUTH] = { .type = NLA_FLAG },
	};
	union wpa_event_data data;

	wpa_printf(MSG_DEBUG, "nl80211: PMKSA candidate event");

	if (!tb[NL80211_ATTR_PMKSA_CANDIDATE])
		return;
	if (nla_parse_nested(cand, MAX_NL80211_PMKSA_CANDIDATE,
			     tb[NL80211_ATTR_PMKSA_CANDIDATE], cand_policy))
		return;
	if (!cand[NL80211_PMKSA_CANDIDATE_INDEX] ||
	    !cand[NL80211_PMKSA_CANDIDATE_BSSID])
		return;

	os_memset(&data, 0, sizeof(data));
	os_memcpy(data.pmkid_candidate.bssid,
		  nla_data(cand[NL80211_PMKSA_CANDIDATE_BSSID]), ETH_ALEN);
	data.pmkid_candidate.index =
		nla_get_u32(cand[NL80211_PMKSA_CANDIDATE_INDEX]);
	data.pmkid_candidate.preauth =
		cand[NL80211_PMKSA_CANDIDATE_PREAUTH] != NULL;
	wpa_supplicant_event(drv->ctx, EVENT_PMKID_CANDIDATE, &data);
}


static void nl80211_client_probe_event(struct wpa_driver_nl80211_data *drv,
				       struct nlattr **tb)
{
	union wpa_event_data data;

	wpa_printf(MSG_DEBUG, "nl80211: Probe client event");

	if (!tb[NL80211_ATTR_MAC] || !tb[NL80211_ATTR_ACK])
		return;

	os_memset(&data, 0, sizeof(data));
	os_memcpy(data.client_poll.addr,
		  nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);

	wpa_supplicant_event(drv->ctx, EVENT_DRIVER_CLIENT_POLL_OK, &data);
}

static void nl80211_req_ch_sw_event(struct wpa_driver_nl80211_data *drv,
				    struct nlattr **tb)
{
	union wpa_event_data data;

	if (!tb[NL80211_ATTR_WIPHY_FREQ])
		return;

	os_memset(&data, 0, sizeof(data));
	data.ch_switch.freq = nla_get_u16(tb[NL80211_ATTR_WIPHY_FREQ]);

	wpa_printf(MSG_DEBUG, "nl80211: Requst to switch to %d freq",
		   data.ch_switch.freq);

	wpa_supplicant_event(drv->ctx, EVENT_REQ_CH_SW, &data);
}

static void nl80211_tdls_oper_event(struct wpa_driver_nl80211_data *drv,
				    struct nlattr **tb)
{
	union wpa_event_data data;

	wpa_printf(MSG_DEBUG, "nl80211: TDLS operation event");

	if (!tb[NL80211_ATTR_MAC] || !tb[NL80211_ATTR_TDLS_OPERATION])
		return;

	os_memset(&data, 0, sizeof(data));
	os_memcpy(data.tdls.peer, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
	switch (nla_get_u8(tb[NL80211_ATTR_TDLS_OPERATION])) {
	case NL80211_TDLS_SETUP:
		wpa_printf(MSG_DEBUG, "nl80211: TDLS setup request for peer "
			   MACSTR, MAC2STR(data.tdls.peer));
		data.tdls.oper = TDLS_REQUEST_SETUP;
		break;
	case NL80211_TDLS_TEARDOWN:
		wpa_printf(MSG_DEBUG, "nl80211: TDLS teardown request for peer "
			   MACSTR, MAC2STR(data.tdls.peer));
		data.tdls.oper = TDLS_REQUEST_TEARDOWN;
		break;
	default:
		wpa_printf(MSG_DEBUG, "nl80211: Unsupported TDLS operatione "
			   "event");
		return;
	}
	if (tb[NL80211_ATTR_REASON_CODE]) {
		data.tdls.reason_code =
			nla_get_u16(tb[NL80211_ATTR_REASON_CODE]);
	}

	wpa_supplicant_event(drv->ctx, EVENT_TDLS, &data);
}


static void nl80211_spurious_frame(struct i802_bss *bss, struct nlattr **tb,
				   int wds)
{
	struct wpa_driver_nl80211_data *drv = bss->drv;
	union wpa_event_data event;

	if (!tb[NL80211_ATTR_MAC])
		return;

	os_memset(&event, 0, sizeof(event));
	event.rx_from_unknown.bssid = bss->addr;
	event.rx_from_unknown.addr = nla_data(tb[NL80211_ATTR_MAC]);
	event.rx_from_unknown.wds = wds;

	wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
}


static void do_process_drv_event(struct i802_bss *bss, int cmd,
				 struct nlattr **tb)
{
	struct wpa_driver_nl80211_data *drv = bss->drv;

	if (drv->ap_scan_as_station != NL80211_IFTYPE_UNSPECIFIED &&
	    (cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
	     cmd == NL80211_CMD_SCAN_ABORTED)) {
		wpa_driver_nl80211_set_mode(&drv->first_bss,
					    drv->ap_scan_as_station);
		drv->ap_scan_as_station = NL80211_IFTYPE_UNSPECIFIED;
	}

	switch (cmd) {
	case NL80211_CMD_TRIGGER_SCAN:
		wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
		break;
	case NL80211_CMD_START_SCHED_SCAN:
		wpa_printf(MSG_DEBUG, "nl80211: Sched scan started");
		break;
	case NL80211_CMD_SCHED_SCAN_STOPPED:
		wpa_printf(MSG_DEBUG, "nl80211: Sched scan stopped");
		wpa_supplicant_event(drv->ctx, EVENT_SCHED_SCAN_STOPPED, NULL);
		break;
	case NL80211_CMD_NEW_SCAN_RESULTS:
		wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
		drv->scan_complete_events = 1;
		eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
				     drv->ctx);
		send_scan_event(drv, 0, tb);
		break;
	case NL80211_CMD_SCHED_SCAN_RESULTS:
		wpa_printf(MSG_DEBUG,
			   "nl80211: New sched scan results available");
		send_scan_event(drv, 0, tb);
		break;
	case NL80211_CMD_SCAN_ABORTED:
		wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
		/*
		 * Need to indicate that scan results are available in order
		 * not to make wpa_supplicant stop its scanning.
		 */
		eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
				     drv->ctx);
		send_scan_event(drv, 1, tb);
		break;
	case NL80211_CMD_AUTHENTICATE:
	case NL80211_CMD_ASSOCIATE:
	case NL80211_CMD_DEAUTHENTICATE:
	case NL80211_CMD_DISASSOCIATE:
	case NL80211_CMD_FRAME_TX_STATUS:
	case NL80211_CMD_UNPROT_DEAUTHENTICATE:
	case NL80211_CMD_UNPROT_DISASSOCIATE:
		mlme_event(drv, cmd, tb[NL80211_ATTR_FRAME],
			   tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
			   tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
			   tb[NL80211_ATTR_COOKIE],
			   tb[NL80211_ATTR_RX_SIGNAL_DBM]);
		break;
	case NL80211_CMD_CONNECT:
	case NL80211_CMD_ROAM:
		mlme_event_connect(drv, cmd,
				   tb[NL80211_ATTR_STATUS_CODE],
				   tb[NL80211_ATTR_MAC],
				   tb[NL80211_ATTR_REQ_IE],
				   tb[NL80211_ATTR_RESP_IE]);
		break;
	case NL80211_CMD_CH_SWITCH_NOTIFY:
		mlme_event_ch_switch(drv, tb[NL80211_ATTR_WIPHY_FREQ],
				     tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE],
				     EVENT_CH_SWITCH);
		break;
	case NL80211_CMD_REQ_CH_SW:
		nl80211_req_ch_sw_event(drv, tb);
		break;
	case NL80211_CMD_DISCONNECT:
		mlme_event_disconnect(drv, tb[NL80211_ATTR_REASON_CODE],
				      tb[NL80211_ATTR_MAC],
				      tb[NL80211_ATTR_DISCONNECTED_BY_AP]);
		break;
	case NL80211_CMD_MICHAEL_MIC_FAILURE:
		mlme_event_michael_mic_failure(bss, tb);
		break;
	case NL80211_CMD_JOIN_IBSS:
		mlme_event_join_ibss(drv, tb);
		break;
	case NL80211_CMD_REMAIN_ON_CHANNEL:
		mlme_event_remain_on_channel(drv, 0, tb);
		break;
	case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
		mlme_event_remain_on_channel(drv, 1, tb);
		break;
	case NL80211_CMD_NOTIFY_CQM:
		nl80211_cqm_event(drv, tb);
		break;
    case NL80211_CMD_ROAMING_SUPPORT:
        nl80211_roaming_support_event(drv, tb);
        break;
	case NL80211_CMD_REG_CHANGE:
		wpa_printf(MSG_DEBUG, "nl80211: Regulatory domain change");
		wpa_supplicant_event(drv->ctx, EVENT_CHANNEL_LIST_CHANGED,
				     NULL);
		break;
	case NL80211_CMD_REG_BEACON_HINT:
		wpa_printf(MSG_DEBUG, "nl80211: Regulatory beacon hint");
		wpa_supplicant_event(drv->ctx, EVENT_CHANNEL_LIST_CHANGED,
				     NULL);
		break;
	case NL80211_CMD_NEW_STATION:
		nl80211_new_station_event(drv, tb);
		break;
	case NL80211_CMD_DEL_STATION:
		nl80211_del_station_event(drv, tb);
		break;
	case NL80211_CMD_SET_REKEY_OFFLOAD:
		nl80211_rekey_offload_event(drv, tb);
		break;
	case NL80211_CMD_PMKSA_CANDIDATE:
		nl80211_pmksa_candidate_event(drv, tb);
		break;
	case NL80211_CMD_PROBE_CLIENT:
		nl80211_client_probe_event(drv, tb);
		break;
	case NL80211_CMD_TDLS_OPER:
		nl80211_tdls_oper_event(drv, tb);
		break;
	default:
		wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
			   "(cmd=%d)", cmd);
		break;
	}
}


static int process_drv_event(struct nl_msg *msg, void *arg)
{
	struct wpa_driver_nl80211_data *drv = arg;
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	struct i802_bss *bss;
	int ifidx = -1;

	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);

	if (tb[NL80211_ATTR_IFINDEX])
		ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);

	for (bss = &drv->first_bss; bss; bss = bss->next) {
		if (ifidx == -1 || ifidx == bss->ifindex) {
			do_process_drv_event(bss, gnlh->cmd, tb);
			return NL_SKIP;
		}
	}

	wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d) for foreign "
		   "interface (ifindex %d)", gnlh->cmd, ifidx);

	return NL_SKIP;
}


static int process_global_event(struct nl_msg *msg, void *arg)
{
	struct nl80211_global *global = arg;
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	struct wpa_driver_nl80211_data *drv, *tmp;
	int ifidx = -1;
	struct i802_bss *bss;

	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);

	if (tb[NL80211_ATTR_IFINDEX])
		ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);

	dl_list_for_each_safe(drv, tmp, &global->interfaces,
			      struct wpa_driver_nl80211_data, list) {
		for (bss = &drv->first_bss; bss; bss = bss->next) {
			if (ifidx == -1 || ifidx == bss->ifindex) {
				do_process_drv_event(bss, gnlh->cmd, tb);
				return NL_SKIP;
			}
		}
	}

	return NL_SKIP;
}


static int process_bss_event(struct nl_msg *msg, void *arg)
{
	struct i802_bss *bss = arg;
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct nlattr *tb[NL80211_ATTR_MAX + 1];

	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);

	switch (gnlh->cmd) {
	case NL80211_CMD_FRAME:
	case NL80211_CMD_FRAME_TX_STATUS:
		mlme_event(bss->drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
			   tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
			   tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
			   tb[NL80211_ATTR_COOKIE],
			   tb[NL80211_ATTR_RX_SIGNAL_DBM]);
		break;
	case NL80211_CMD_UNEXPECTED_FRAME:
		nl80211_spurious_frame(bss, tb, 0);
		break;
	case NL80211_CMD_UNEXPECTED_4ADDR_FRAME:
		nl80211_spurious_frame(bss, tb, 1);
		break;
	default:
		wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
			   "(cmd=%d)", gnlh->cmd);
		break;
	}

	return NL_SKIP;
}


static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
					     void *handle)
{
	struct nl_cb *cb = eloop_ctx;

	wpa_printf(MSG_DEBUG, "nl80211: Event message available");

	nl_recvmsgs(handle, cb);
}


/**
 * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 * @priv: driver_nl80211 private data
 * @alpha2_arg: country to which to switch to
 * Returns: 0 on success, -1 on failure
 *
 * This asks nl80211 to set the regulatory domain for given
 * country ISO / IEC alpha2.
 */
static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
{
	struct i802_bss *bss = priv;
	struct wpa_driver_nl80211_data *drv = bss->drv;
	char alpha2[3];
	struct nl_msg *msg;

	msg = nlmsg_alloc();
	if (!msg)
		return -ENOMEM;

	alpha2[0] = alpha2_arg[0];
	alpha2[1] = alpha2_arg[1];
	alpha2[2] = '\0';

	nl80211_cmd(drv, msg, 0, NL80211_CMD_REQ_SET_REG);

	NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
	if (send_and_recv_msgs(drv, msg, NULL, NULL))
		return -EINVAL;
	return 0;
nla_put_failure:
	nlmsg_free(msg);
	return -EINVAL;
}


struct wiphy_info_data {
	struct wpa_driver_capa *capa;

	unsigned int error:1;
	unsigned int device_ap_sme:1;
	unsigned int poll_command_supported:1;
	unsigned int data_tx_status:1;
	unsigned int monitor_supported:1;
};


static unsigned int probe_resp_offload_support(int supp_protocols)
{
	unsigned int prot = 0;

	if (supp_protocols & NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS)
		prot |= WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS;
	if (supp_protocols & NL80211_PROBE_RESP_OFFLOAD_SUPPORT_WPS2)
		prot |= WPA_DRIVER_PROBE_RESP_OFFLOAD_WPS2;
	if (supp_protocols & NL80211_PROBE_RESP_OFFLOAD_SUPPORT_P2P)
		prot |= WPA_DRIVER_PROBE_RESP_OFFLOAD_P2P;
	if (supp_protocols & NL80211_PROBE_RESP_OFFLOAD_SUPPORT_80211U)
		prot |= WPA_DRIVER_PROBE_RESP_OFFLOAD_INTERWORKING;

	return prot;
}


static int wiphy_info_handler(struct nl_msg *msg, void *arg)
{
	struct nlattr *tb[NL80211_ATTR_MAX + 1];
	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
	struct wiphy_info_data *info = arg;
	int p2p_go_supported = 0, p2p_client_supported = 0;
	int p2p_concurrent = 0, p2p_multichan_concurrent = 0;
	int auth_supported = 0, connect_supported = 0;
	struct wpa_driver_capa *capa = info->capa;
	static struct nla_policy
	iface_combination_policy[NUM_NL80211_IFACE_COMB] = {
		[NL80211_IFACE_COMB_LIMITS] = { .type = NLA_NESTED },
		[NL80211_IFACE_COMB_MAXNUM] = { .type = NLA_U32 },
		[NL80211_IFACE_COMB_STA_AP_BI_MATCH] = { .type = NLA_FLAG },
		[NL80211_IFACE_COMB_NUM_CHANNELS] = { .type = NLA_U32 },
	},
	iface_limit_policy[NUM_NL80211_IFACE_LIMIT] = {
		[NL80211_IFACE_LIMIT_TYPES] = { .type = NLA_NESTED },
		[NL80211_IFACE_LIMIT_MAX] = { .type = NLA_U32 },
	};

	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
		  genlmsg_attrlen(gnlh, 0), NULL);

	if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
		capa->max_scan_ssids =
			nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);

	if (tb[NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS])
		capa->max_sched_scan_ssids =
			nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCHED_SCAN_SSIDS]);

	if (tb[NL80211_ATTR_MAX_MATCH_SETS])
		capa->max_match_sets =
			nla_get_u8(tb[NL80211_ATTR_MAX_MATCH_SETS]);

	if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
		struct nlattr *nl_mode;
		int i;
		nla_for_each_nested(nl_mode,
				    tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
			switch (nla_type(nl_mode)) {
			case NL80211_IFTYPE_AP:
				capa->flags |= WPA_DRIVER_FLAGS_AP;
				break;
			case NL80211_IFTYPE_P2P_GO:
				p2p_go_supported = 1;
				break;
			case NL80211_IFTYPE_P2P_CLIENT:
				p2p_client_supported = 1;
				break;
			case NL80211_IFTYPE_MONITOR:
				info->monitor_supported = 1;
				break;
			}
		}
	}

	if (tb[NL80211_ATTR_INTERFACE_COMBINATIONS]) {
		struct nlattr *nl_combi;
		int rem_combi;

		nla_for_each_nested(nl_combi,
				    tb[NL80211_ATTR_INTERFACE_COMBINATIONS],
				    rem_combi) {
			struct nlattr *tb_comb[NUM_NL80211_IFACE_COMB];
			struct nlattr *tb_limit[NUM_NL80211_IFACE_LIMIT];
			struct nlattr *nl_limit, *nl_mode;
			int err, rem_limit, rem_mode;
			int combination_has_p2p = 0, combination_has_mgd = 0;

			err = nla_parse_nested(tb_comb, MAX_NL80211_IFACE_COMB,
					       nl_combi,
					       iface_combination_policy);
			if (err || !tb_comb[NL80211_IFACE_COMB_LIMITS] ||
			    !tb_comb[NL80211_IFACE_COMB_MAXNUM] ||
			    !tb_comb[NL80211_IFACE_COMB_NUM_CHANNELS])
				goto broken_combination;

			nla_for_each_nested(nl_limit,
					    tb_comb[NL80211_IFACE_COMB_LIMITS],
					    rem_limit) {
				err = nla_parse_nested(tb_limit,
						       MAX_NL80211_IFACE_LIMIT,
						       nl_limit,
						       iface_limit_policy);
				if (err ||
				    !tb_limit[NL80211_IFACE_LIMIT_TYPES])
					goto broken_combination;

				nla_for_each_nested(
					nl_mode,
					tb_limit[NL80211_IFACE_LIMIT_TYPES],
					rem_mode) {
					int ift = nla_type(nl_mode);
					if (ift == NL80211_IFTYPE_P2P_GO ||
					    ift == NL80211_IFTYPE_P2P_CLIENT)
						combination_has_p2p = 1;
					if (ift == NL80211_IFTYPE_STATION)
						combination_has_mgd = 1;
				}
				if (combination_has_p2p && combination_has_mgd)
					break;
			}

			if (combination_has_p2p && combination_has_mgd) {
				p2p_concurrent = 1;
				if (nla_get_u32(tb_comb[NL80211_IFACE_COMB_NUM_CHANNELS]) > 1)
					p2p_multichan_concurrent = 1;
				break;
			}

broken_combination:
			;
		}
	}

	if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
		struct nlattr *nl_cmd;
		int i;

		nla_for_each_nested(nl_cmd,
				    tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
			switch (nla_get_u32(nl_cmd)) {
			case NL80211_CMD_AUTHENTICATE:
				auth_supported = 1;
				break;
			case NL80211_CMD_CONNECT:
				connect_supported = 1;
				break;
			case NL80211_CMD_START_SCHED_SCAN:
				capa->sched_scan_supported = 1;
				break;
			case NL80211_CMD_PROBE_CLIENT:
				info->poll_command_supported = 1;
				break;
			}
		}
	}

	if (tb[NL80211_ATTR_OFFCHANNEL_TX_OK]) {
		wpa_printf(MSG_DEBUG, "nl80211: Using driver-based "
			   "off-channel TX");
		capa->flags |= WPA_DRIVER_FLAGS_OFFCHANNEL_TX;
	}

	if (tb[NL80211_ATTR_ROAM_SUPPORT]) {
		wpa_printf(MSG_DEBUG, "nl80211: Using driver-based roaming");
		capa->flags |= WPA_DRIVER_FLAGS_BSS_SELECTION;
	}

	/* default to 5000 since early versions of mac80211 don't set it */
	capa->max_remain_on_chan = 5000;

	if (tb[NL80211_ATTR_SUPPORT_AP_UAPSD])
		capa->flags |= WPA_DRIVER_FLAGS_AP_UAPSD;

	if (tb[NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION])
		capa->max_remain_on_chan =
			nla_get_u32(tb[NL80211_ATTR_MAX_REMAIN_ON_CHANNEL_DURATION]);

	if (auth_supported)
		capa->flags |= WPA_DRIVER_FLAGS_SME;
	else if (!connect_supported) {
		wpa_printf(MSG_INFO, "nl80211: Driver does not support "
			   "authentication/association or connect commands");
		info->error = 1;
	}

	if (p2p_go_supported && p2p_client_supported)
		capa->flags |= WPA_DRIVER_FLAGS_P2P_CAPABLE;
	if (p2p_concurrent) {
		wpa_printf(MSG_DEBUG, "nl80211: Use separate P2P group "
			   "interface (driver advertised support)");
		capa->flags |= WPA_DRIVER_FLAGS_P2P_CONCURRENT;
		capa->flags |= WPA_DRIVER_FLAGS_P2P_MGMT_AND_NON_P2P;

		if (p2p_multichan_concurrent) {
			wpa_printf(MSG_DEBUG, "nl80211: Enable multi-channel "
				   "concurrent (driver advertised support)");
			capa->flags |=
				WPA_DRIVER_FLAGS_MULTI_CHANNEL_CONCURRENT;
		}
	}

	if (tb[NL80211_ATTR_TDLS_SUPPORT]) {
		wpa_printf(MSG_DEBUG, "nl80211: TDLS supported");
		capa->flags |= WPA_DRIVER_FLAGS_TDLS_SUPPORT;

		if (tb[NL80211_ATTR_TDLS_EXTERNAL_SETUP]) {
			wpa_printf(MSG_DEBUG, "nl80211: TDLS external setup");
			capa->flags |=
				WPA_DRIVER_FLAGS_TDLS_EXTERNAL_SETUP;
		}
	}

	if (tb[NL80211_ATTR_DEVICE_AP_SME])
		info->device_ap_sme = 1;

	if (tb[NL80211_ATTR_FEATURE_FLAGS]) {
		u32 flags = nla_get_u32(tb[NL80211_ATTR_FEATURE_FLAGS]);

		if (flags & NL80211_FEATURE_SK_TX_STATUS)
			info->data_tx_status = 1;

		if (flags & NL80211_FEATURE_INACTIVITY_TIMER)
			capa->flags |= WPA_DRIVER_FLAGS_INACTIVITY_TIMER;

		if (flags & NL80211_FEATURE_SAE)
			capa->flags |= WPA_DRIVER_FLAGS_SAE;

		if (flags & NL80211_FEATURE_NEED_OBSS_SCAN)
			capa->flags |= WPA_DRIVER_FLAGS_OBSS_SCAN;
	}

	if (tb[NL80211_ATTR_PROBE_RESP_OFFLOAD]) {
		int protocols =
			nla_get_u32(tb[NL80211_ATTR_PROBE_RESP_OFFLOAD]);
		wpa_printf(MSG_DEBUG, "nl80211: Supports Probe Response "
			   "offload in AP mode");
		capa->flags |= WPA_DRIVER_FLAGS_PROBE_RESP_OFFLOAD;
		capa->probe_resp_offloads =
			probe_resp_offload_support(protocols);
	}

	return NL_SKIP;
}


static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
				       struct wiphy_info_data *info)
{
	struct nl_msg *msg;

	os_memset(info, 0, sizeof(*info));
	info->capa = &drv->capa;

	msg = nlmsg_alloc();
	if (!msg)
		return -1;

	nl80211_cmd(drv, msg, 0, NL80211_CMD_GET_WIPHY);

	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);

	if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
		return 0;
	msg = NULL;
nla_put_failure:
	nlmsg_free(msg);
	return -1;
}


static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
{
	struct wiphy_info_data info;
	if (wpa_driver_nl80211_get_info(drv, &info))
		return -1;

	if (info.error)
		return -1;

	drv->has_capability = 1;
	/* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
	drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
		WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
		WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
		WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
	drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
		WPA_DRIVER_CAPA_ENC_WEP104 |
		WPA_DRIVER_CAPA_ENC_TKIP |
		WPA_DRIVER_CAPA_ENC_CCMP;
	drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
		WPA_DRIVER_AUTH_SHARED |
		WPA_DRIVER_AUTH_LEAP;

	drv->capa.flags |= WPA_DRIVER_FLAGS_SANE_ERROR_CODES;
	drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
	drv->capa.flags |= WPA_DRIVER_FLAGS_EAPOL_TX_STATUS;

	if (!info.device_ap_sme) {
		drv->capa.flags |= WPA_DRIVER_FLAGS_DEAUTH_TX_STATUS;

		/*
		 * No AP SME is currently assumed to also indicate no AP MLME
		 * in the driver/firmware.
		 */
		drv->capa.flags |= WPA_DRIVER_FLAGS_AP_MLME;
	}

	drv->device_ap_sme = info.device_ap_sme;
	drv->poll_command_supported = info.poll_command_supported;
	drv->data_tx_status = info.data_tx_status;

	/*
	 * If poll command and tx status are supported, mac80211 is new enough
	 * to have everything we need to not need monitor interfaces.
	 */
	drv->use_monitor = !info.poll_command_supported || !info.data_tx_status;

	if (drv->device_ap_sme && drv->use_monitor) {
		/*
		 * Non-mac80211 drivers may not support monitor interface.
		 * Make sure we do not get stuck with incorrect capability here
		 * by explicitly testing this.
		 */
		if (!info.monitor_supported) {
			wpa_printf(MSG_DEBUG, "nl80211: Disable use_monitor "
				   "with device_ap_sme since no monitor mode "
				   "support detected");
			drv->use_monitor = 0;
		}
	}

	/*
	 * If we aren't going to use monitor interfaces, but the
	 * driver doesn't support data TX status, we won't get TX
	 * status for EAPOL frames.
	 */
	if (!drv->use_monitor && !info.data_tx_status)
		drv->capa.flags &= ~WPA_DRIVER_FLAGS_EAPOL_TX_STATUS;

	return 0;
}


#ifdef ANDROID
static int android_genl_ctrl_resolve(struct nl_handle *handle,
				     const char *name)
{
	/*
	 * Android ICS has very minimal genl_ctrl_resolve() implementation, so
	 * need to work around that.
	 */
	struct nl_cache *cache = NULL;
	struct genl_family *nl80211 = NULL;
	int id = -1;

	if (genl_ctrl_alloc_cache(handle, &cache) < 0) {
		wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
			   "netlink cache");
		goto fail;
	}

	nl80211 = genl_ctrl_search_by_name(cache, name);
	if (nl80211 == NULL)
		goto fail;

	id = genl_family_get_id(nl80211);

fail:
	if (nl80211)
		genl_family_put(nl80211);
	if (cache)
		nl_cache_free(cache);

	return id;
}
#define genl_ctrl_resolve android_genl_ctrl_resolve
#endif /* ANDROID */


static int wpa_driver_nl80211_init_nl_global(struct nl80211_global *global)
{
	int ret;

	global->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
	if (global->nl_cb == NULL) {
		wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
			   "callbacks");
		return -1;
	}

	global->nl = nl_create_handle(global->nl_cb, "nl");
	if (global->nl == NULL)
		goto err;

	global->nl80211_id = genl_ctrl_resolve(global->nl, "nl80211");
	if (global->nl80211_id < 0) {
		wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
			   "found");
		goto err;
	}

	global->nl_event = nl_create_handle(global->nl_cb, "event");
	if (global->nl_event == NULL)
		goto err;

	ret = nl_get_multicast_id(global, "nl80211", "scan");
	if (ret >= 0)
		ret = nl_socket_add_membership(global->nl_event, ret);
	if (ret < 0) {
		wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
			   "membership for scan events: %d (%s)",
			   ret, strerror(-ret));
		goto err;
	}

	ret = nl_get_multicast_id(global, "nl80211", "mlme");
	if (ret >= 0)
		ret = nl_socket_add_membership(global->nl_event, ret);
	if (ret < 0) {
		wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
			   "membership for mlme events: %d (%s)",
			   ret, strerror(-ret));
		goto err;
	}

	ret = nl_get_multicast_id(global, "nl80211", "regulatory");
	if (ret >= 0)
		ret = nl_socket_add_membership(global->nl_event, ret);
	if (ret < 0) {
		wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
			   "membership for regulatory events: %d (%s)",
			   ret, strerror(-ret));
		/* Continue without regulatory events */
	}

	nl_cb_set(global->nl_cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM,
		  no_seq_check, NULL);
	nl_cb_set(global->nl_cb, NL_CB_VALID, NL_CB_CUSTOM,
		  process_global_event, global);

	eloop_register_read_sock(nl_socket_get_fd(global->nl_event),
				 wpa_driver_nl80211_event_receive,
				 global->nl_cb, global->nl_event);

	return 0;

err:
	nl_destroy_handles(&global->nl_event);
	nl_destroy_handles(&global->nl);
	nl_cb_put(global->nl_cb);
	global->nl_cb = NULL;
	return -1;
}


static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv)
{
	drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
	if (!drv->nl_cb) {
		wpa_printf(MSG_ERROR, "nl80211: Failed to alloc cb struct");
		return -1;
	}

	nl_cb_set(drv->nl_cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM,
		  no_seq_check, NULL);
	nl_cb_set(drv->nl_cb, NL_CB_VALID, NL_CB_CUSTOM,
		  process_drv_event, drv);

	return 0;
}


static void wpa_driver_nl80211_rfkill_blocked(void *ctx)
{
	wpa_printf(MSG_DEBUG, "nl80211: RFKILL blocked");
	/*
	 * This may be for any interface; use ifdown event to disable
	 * interface.
	 */
}


static void wpa_driver_nl80211_rfkill_unblocked(void *ctx)
{
	struct wpa_driver_nl80211_data *drv = ctx;
	wpa_printf(MSG_DEBUG, "nl80211: RFKILL unblocked");
	if (linux_set_iface_flags(drv->global->ioctl_sock,
				  drv->first_bss.ifname, 1)) {
		wpa_printf(MSG_DEBUG, "nl80211: Could not set interface UP "
			   "after rfkill unblock");
		return;
	}
	/* rtnetlink ifup handler will report interface as enabled */
}


static void nl80211_get_phy_name(struct wpa_driver_nl80211_data *drv)
{
	/* Find phy (radio) to which this interface belongs */
	char buf[90], *pos;
	int f, rv;

	drv->phyname[0] = '\0';
	snprintf(buf, sizeof(buf) - 1, "/sys/class/net/%s/phy80211/name",
		 drv->first_bss.ifname);
	f = open(buf, O_RDONLY);
	if (f < 0) {
		wpa_printf(MSG_DEBUG, "Could not open file %s: %s",
			   buf, strerror(errno));
		return;
	}

	rv = read(f, drv->phyname, sizeof(drv->phyname) - 1);
	close(f);
	if (rv < 0) {