nl80211: Ignore deauth/disassoc event during Connect reassociation

[thirdparty/hostap.git] / src / drivers / driver_nl80211.c

/*
 * Driver interaction with Linux nl80211/cfg80211
 * Copyright (c) 2002-2015, 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/types.h>
#include <fcntl.h>
#include <net/if.h>
#include <netlink/genl/genl.h>
#include <netlink/genl/ctrl.h>
#ifdef CONFIG_LIBNL3_ROUTE
#include <netlink/route/neighbour.h>
#endif /* CONFIG_LIBNL3_ROUTE */
#include <linux/rtnetlink.h>
#include <netpacket/packet.h>
#include <linux/errqueue.h>

#include "common.h"
#include "eloop.h"
#include "common/qca-vendor.h"
#include "common/qca-vendor-attr.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "l2_packet/l2_packet.h"
#include "netlink.h"
#include "linux_defines.h"
#include "linux_ioctl.h"
#include "radiotap.h"
#include "radiotap_iter.h"
#include "rfkill.h"
#include "driver_nl80211.h"


#ifndef CONFIG_LIBNL20
/*
 * 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 */


#ifdef ANDROID
/* system/core/libnl_2 does not include nl_socket_set_nonblocking() */
#undef nl_socket_set_nonblocking
#define nl_socket_set_nonblocking(h) android_nl_socket_set_nonblocking(h)

#endif /* ANDROID */


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;
}


#if __WORDSIZE == 64
#define ELOOP_SOCKET_INVALID    (intptr_t) 0x8888888888888889ULL
#else
#define ELOOP_SOCKET_INVALID    (intptr_t) 0x88888889ULL
#endif

static void nl80211_register_eloop_read(struct nl_handle **handle,
                                        eloop_sock_handler handler,
                                        void *eloop_data)
{
#ifdef CONFIG_LIBNL20
        /*
         * libnl uses a pretty small buffer (32 kB that gets converted to 64 kB)
         * by default. It is possible to hit that limit in some cases where
         * operations are blocked, e.g., with a burst of Deauthentication frames
         * to hostapd and STA entry deletion. Try to increase the buffer to make
         * this less likely to occur.
         */
        if (nl_socket_set_buffer_size(*handle, 262144, 0) < 0) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Could not set nl_socket RX buffer size: %s",
                           strerror(errno));
                /* continue anyway with the default (smaller) buffer */
        }
#endif /* CONFIG_LIBNL20 */

        nl_socket_set_nonblocking(*handle);
        eloop_register_read_sock(nl_socket_get_fd(*handle), handler,
                                 eloop_data, *handle);
        *handle = (void *) (((intptr_t) *handle) ^ ELOOP_SOCKET_INVALID);
}


static void nl80211_destroy_eloop_handle(struct nl_handle **handle)
{
        *handle = (void *) (((intptr_t) *handle) ^ ELOOP_SOCKET_INVALID);
        eloop_unregister_read_sock(nl_socket_get_fd(*handle));
        nl_destroy_handles(handle);
}


static void nl80211_global_deinit(void *priv);
static void nl80211_check_global(struct nl80211_global *global);

static void wpa_driver_nl80211_deinit(struct i802_bss *bss);
static int wpa_driver_nl80211_set_mode_ibss(struct i802_bss *bss,
                                            struct hostapd_freq_params *freq);

static int
wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv,
                                   const u8 *set_addr, int first,
                                   const char *driver_params);
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,
                                  const u16 *csa_offs, size_t csa_offs_len);
static int wpa_driver_nl80211_probe_req_report(struct i802_bss *bss,
                                               int report);

#define IFIDX_ANY -1

static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx,
                      int ifidx_reason);
static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx,
                      int ifidx_reason);
static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx,
                      int ifidx_reason);

static int nl80211_set_channel(struct i802_bss *bss,
                               struct hostapd_freq_params *freq, int set_chan);
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,
                              int reset_mode);

static int i802_set_iface_flags(struct i802_bss *bss, int up);
static int nl80211_set_param(void *priv, const char *param);


/* Converts nl80211_chan_width to a common format */
enum chan_width convert2width(int width)
{
        switch (width) {
        case NL80211_CHAN_WIDTH_20_NOHT:
                return CHAN_WIDTH_20_NOHT;
        case NL80211_CHAN_WIDTH_20:
                return CHAN_WIDTH_20;
        case NL80211_CHAN_WIDTH_40:
                return CHAN_WIDTH_40;
        case NL80211_CHAN_WIDTH_80:
                return CHAN_WIDTH_80;
        case NL80211_CHAN_WIDTH_80P80:
                return CHAN_WIDTH_80P80;
        case NL80211_CHAN_WIDTH_160:
                return CHAN_WIDTH_160;
        }
        return CHAN_WIDTH_UNKNOWN;
}


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


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


static int is_p2p_net_interface(enum nl80211_iftype nlmode)
{
        return nlmode == NL80211_IFTYPE_P2P_CLIENT ||
                nlmode == NL80211_IFTYPE_P2P_GO;
}


struct i802_bss * get_bss_ifindex(struct wpa_driver_nl80211_data *drv,
                                  int ifindex)
{
        struct i802_bss *bss;

        for (bss = drv->first_bss; bss; bss = bss->next) {
                if (bss->ifindex == ifindex)
                        return bss;
        }

        return NULL;
}


static int is_mesh_interface(enum nl80211_iftype nlmode)
{
        return nlmode == NL80211_IFTYPE_MESH_POINT;
}


void nl80211_mark_disconnected(struct wpa_driver_nl80211_data *drv)
{
        if (drv->associated)
                os_memcpy(drv->prev_bssid, drv->bssid, ETH_ALEN);
        drv->associated = 0;
        os_memset(drv->bssid, 0, ETH_ALEN);
}


/* 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 void nl80211_nlmsg_clear(struct nl_msg *msg)
{
        /*
         * Clear nlmsg data, e.g., to make sure key material is not left in
         * heap memory for unnecessarily long time.
         */
        if (msg) {
                struct nlmsghdr *hdr = nlmsg_hdr(msg);
                void *data = nlmsg_data(hdr);
                /*
                 * This would use nlmsg_datalen() or the older nlmsg_len() if
                 * only libnl were to maintain a stable API.. Neither will work
                 * with all released versions, so just calculate the length
                 * here.
                 */
                int len = hdr->nlmsg_len - NLMSG_HDRLEN;

                os_memset(data, 0, len);
        }
}


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;

        if (!msg)
                return -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) {
                int res = nl_recvmsgs(nl_handle, cb);
                if (res < 0) {
                        wpa_printf(MSG_INFO,
                                   "nl80211: %s->nl_recvmsgs failed: %d",
                                   __func__, res);
                }
        }
 out:
        nl_cb_put(cb);
        if (!valid_handler && valid_data == (void *) -1)
                nl80211_nlmsg_clear(msg);
        nlmsg_free(msg);
        return err;
}


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;
        struct family_data res = { group, -ENOENT };

        msg = nlmsg_alloc();
        if (!msg)
                return -ENOMEM;
        if (!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)) {
                nlmsg_free(msg);
                return -1;
        }

        ret = send_and_recv(global, global->nl, msg, family_handler, &res);
        if (ret == 0)
                ret = res.id;
        return ret;
}


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);
}


static int nl80211_set_iface_id(struct nl_msg *msg, struct i802_bss *bss)
{
        if (bss->wdev_id_set)
                return nla_put_u64(msg, NL80211_ATTR_WDEV, bss->wdev_id);
        return nla_put_u32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
}


struct nl_msg * nl80211_cmd_msg(struct i802_bss *bss, int flags, uint8_t cmd)
{
        struct nl_msg *msg;

        msg = nlmsg_alloc();
        if (!msg)
                return NULL;

        if (!nl80211_cmd(bss->drv, msg, flags, cmd) ||
            nl80211_set_iface_id(msg, bss) < 0) {
                nlmsg_free(msg);
                return NULL;
        }

        return msg;
}


static struct nl_msg *
nl80211_ifindex_msg(struct wpa_driver_nl80211_data *drv, int ifindex,
                    int flags, uint8_t cmd)
{
        struct nl_msg *msg;

        msg = nlmsg_alloc();
        if (!msg)
                return NULL;

        if (!nl80211_cmd(drv, msg, flags, cmd) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, ifindex)) {
                nlmsg_free(msg);
                return NULL;
        }

        return msg;
}


struct nl_msg * nl80211_drv_msg(struct wpa_driver_nl80211_data *drv, int flags,
                                uint8_t cmd)
{
        return nl80211_ifindex_msg(drv, drv->ifindex, flags, cmd);
}


struct nl_msg * nl80211_bss_msg(struct i802_bss *bss, int flags, uint8_t cmd)
{
        return nl80211_ifindex_msg(bss->drv, bss->ifindex, flags, cmd);
}


struct wiphy_idx_data {
        int wiphy_idx;
        enum nl80211_iftype nlmode;
        u8 *macaddr;
};


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]);

        if (tb[NL80211_ATTR_IFTYPE])
                info->nlmode = nla_get_u32(tb[NL80211_ATTR_IFTYPE]);

        if (tb[NL80211_ATTR_MAC] && info->macaddr)
                os_memcpy(info->macaddr, nla_data(tb[NL80211_ATTR_MAC]),
                          ETH_ALEN);

        return NL_SKIP;
}


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

        if (!(msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_GET_INTERFACE)))
                return -1;

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


static enum nl80211_iftype nl80211_get_ifmode(struct i802_bss *bss)
{
        struct nl_msg *msg;
        struct wiphy_idx_data data = {
                .nlmode = NL80211_IFTYPE_UNSPECIFIED,
                .macaddr = NULL,
        };

        if (!(msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_GET_INTERFACE)))
                return NL80211_IFTYPE_UNSPECIFIED;

        if (send_and_recv_msgs(bss->drv, msg, netdev_info_handler, &data) == 0)
                return data.nlmode;
        return NL80211_IFTYPE_UNSPECIFIED;
}


static int nl80211_get_macaddr(struct i802_bss *bss)
{
        struct nl_msg *msg;
        struct wiphy_idx_data data = {
                .macaddr = bss->addr,
        };

        if (!(msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_GET_INTERFACE)))
                return -1;

        return send_and_recv_msgs(bss->drv, msg, netdev_info_handler, &data);
}


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

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

        if (!nl80211_cmd(drv, msg, 0, NL80211_CMD_REGISTER_BEACONS) ||
            nla_put_u32(msg, NL80211_ATTR_WIPHY, w->wiphy_idx)) {
                nlmsg_free(msg);
                return -1;
        }

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


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

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

        res = nl_recvmsgs(handle, w->nl_cb);
        if (res < 0) {
                wpa_printf(MSG_INFO, "nl80211: %s->nl_recvmsgs failed: %d",
                           __func__, res);
        }
}


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;
        }

        nl80211_register_eloop_read(&w->nl_beacons, nl80211_recv_beacons, w);

        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;

        nl80211_destroy_eloop_handle(&w->nl_beacons);

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


static unsigned int nl80211_get_ifindex(void *priv)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;

        return drv->ifindex;
}


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_newlink(
        struct nl80211_global *global, struct wpa_driver_nl80211_data *drv,
        int ifindex, const char *ifname)
{
        union wpa_event_data event;

        if (drv && os_strcmp(drv->first_bss->ifname, ifname) == 0) {
                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)
                        return;
                wpa_printf(MSG_DEBUG, "nl80211: Mark if_removed=0 for %s based on RTM_NEWLINK event",
                           drv->first_bss->ifname);
                drv->if_removed = 0;
        }

        os_memset(&event, 0, sizeof(event));
        event.interface_status.ifindex = ifindex;
        os_strlcpy(event.interface_status.ifname, ifname,
                   sizeof(event.interface_status.ifname));
        event.interface_status.ievent = EVENT_INTERFACE_ADDED;
        if (drv)
                wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
        else
                wpa_supplicant_event_global(global->ctx, EVENT_INTERFACE_STATUS,
                                            &event);
}


static void wpa_driver_nl80211_event_dellink(
        struct nl80211_global *global, struct wpa_driver_nl80211_data *drv,
        int ifindex, const char *ifname)
{
        union wpa_event_data event;

        if (drv && os_strcmp(drv->first_bss->ifname, ifname) == 0) {
                if (drv->if_removed) {
                        wpa_printf(MSG_DEBUG, "nl80211: if_removed already set - ignore RTM_DELLINK event for %s",
                                   ifname);
                        return;
                }
                wpa_printf(MSG_DEBUG, "RTM_DELLINK: Interface '%s' removed - mark if_removed=1",
                           ifname);
                drv->if_removed = 1;
        } else {
                wpa_printf(MSG_DEBUG, "RTM_DELLINK: Interface '%s' removed",
                           ifname);
        }

        os_memset(&event, 0, sizeof(event));
        event.interface_status.ifindex = ifindex;
        os_strlcpy(event.interface_status.ifname, ifname,
                   sizeof(event.interface_status.ifname));
        event.interface_status.ievent = EVENT_INTERFACE_REMOVED;
        if (drv)
                wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
        else
                wpa_supplicant_event_global(global->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)) {
                nl80211_check_global(drv->global);
                wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
                           "interface");
                wpa_driver_nl80211_finish_drv_init(drv, NULL, 0, NULL);
                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, IFIDX_ANY))
                        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;
        struct rtattr *attr;
        u32 brid = 0;
        char namebuf[IFNAMSIZ];
        char ifname[IFNAMSIZ + 1];
        char extra[100], *pos, *end;

        extra[0] = '\0';
        pos = extra;
        end = pos + sizeof(extra);
        ifname[0] = '\0';

        attrlen = len;
        attr = (struct rtattr *) buf;
        while (RTA_OK(attr, attrlen)) {
                switch (attr->rta_type) {
                case IFLA_IFNAME:
                        if (RTA_PAYLOAD(attr) >= IFNAMSIZ)
                                break;
                        os_memcpy(ifname, RTA_DATA(attr), RTA_PAYLOAD(attr));
                        ifname[RTA_PAYLOAD(attr)] = '\0';
                        break;
                case IFLA_MASTER:
                        brid = nla_get_u32((struct nlattr *) attr);
                        pos += os_snprintf(pos, end - pos, " master=%u", brid);
                        break;
                case IFLA_WIRELESS:
                        pos += os_snprintf(pos, end - pos, " wext");
                        break;
                case IFLA_OPERSTATE:
                        pos += os_snprintf(pos, end - pos, " operstate=%u",
                                           nla_get_u32((struct nlattr *) attr));
                        break;
                case IFLA_LINKMODE:
                        pos += os_snprintf(pos, end - pos, " linkmode=%u",
                                           nla_get_u32((struct nlattr *) attr));
                        break;
                }
                attr = RTA_NEXT(attr, attrlen);
        }
        extra[sizeof(extra) - 1] = '\0';

        wpa_printf(MSG_DEBUG, "RTM_NEWLINK: ifi_index=%d ifname=%s%s ifi_family=%d ifi_flags=0x%x (%s%s%s%s)",
                   ifi->ifi_index, ifname, extra, ifi->ifi_family,
                   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]" : "");

        drv = nl80211_find_drv(global, ifi->ifi_index, buf, len);
        if (!drv)
                goto event_newlink;

        if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
                namebuf[0] = '\0';
                if (if_indextoname(ifi->ifi_index, namebuf) &&
                    linux_iface_up(drv->global->ioctl_sock, namebuf) > 0) {
                        wpa_printf(MSG_DEBUG, "nl80211: Ignore interface down "
                                   "event since interface %s is up", namebuf);
                        drv->ignore_if_down_event = 0;
                        return;
                }
                wpa_printf(MSG_DEBUG, "nl80211: Interface down (%s/%s)",
                           namebuf, ifname);
                if (os_strcmp(drv->first_bss->ifname, ifname) != 0) {
                        wpa_printf(MSG_DEBUG,
                                   "nl80211: Not the main interface (%s) - do not indicate interface down",
                                   drv->first_bss->ifname);
                } else 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);

                        /*
                         * Try to get drv again, since it may be removed as
                         * part of the EVENT_INTERFACE_DISABLED handling for
                         * dynamic interfaces
                         */
                        drv = nl80211_find_drv(global, ifi->ifi_index,
                                               buf, len);
                        if (!drv)
                                return;
                }
        }

        if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
                if (if_indextoname(ifi->ifi_index, namebuf) &&
                    linux_iface_up(drv->global->ioctl_sock, namebuf) == 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 {
                        struct i802_bss *bss;
                        u8 addr[ETH_ALEN];

                        /* Re-read MAC address as it may have changed */
                        bss = get_bss_ifindex(drv, ifi->ifi_index);
                        if (bss &&
                            linux_get_ifhwaddr(drv->global->ioctl_sock,
                                               bss->ifname, addr) < 0) {
                                wpa_printf(MSG_DEBUG,
                                           "nl80211: %s: failed to re-read MAC address",
                                           bss->ifname);
                        } else if (bss &&
                                   os_memcmp(addr, bss->addr, ETH_ALEN) != 0) {
                                wpa_printf(MSG_DEBUG,
                                           "nl80211: Own MAC address on ifindex %d (%s) changed from "
                                           MACSTR " to " MACSTR,
                                           ifi->ifi_index, bss->ifname,
                                           MAC2STR(bss->addr),
                                           MAC2STR(addr));
                                os_memcpy(bss->addr, addr, ETH_ALEN);
                        }

                        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)) {
                wpa_printf(MSG_DEBUG, "nl80211: Set IF_OPER_UP again based on ifi_flags and expected operstate");
                netlink_send_oper_ifla(drv->global->netlink, drv->ifindex,
                                       -1, IF_OPER_UP);
        }

event_newlink:
        if (ifname[0])
                wpa_driver_nl80211_event_newlink(global, drv, ifi->ifi_index,
                                                 ifname);

        if (ifi->ifi_family == AF_BRIDGE && brid && drv) {
                struct i802_bss *bss;

                /* device has been added to bridge */
                if (!if_indextoname(brid, namebuf)) {
                        wpa_printf(MSG_DEBUG,
                                   "nl80211: Could not find bridge ifname for ifindex %u",
                                   brid);
                        return;
                }
                wpa_printf(MSG_DEBUG, "nl80211: Add ifindex %u for bridge %s",
                           brid, namebuf);
                add_ifidx(drv, brid, ifi->ifi_index);

                for (bss = drv->first_bss; bss; bss = bss->next) {
                        if (os_strcmp(ifname, bss->ifname) == 0) {
                                os_strlcpy(bss->brname, namebuf, IFNAMSIZ);
                                break;
                        }
                }
        }
}


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;
        struct rtattr *attr;
        u32 brid = 0;
        char ifname[IFNAMSIZ + 1];
        char extra[100], *pos, *end;

        extra[0] = '\0';
        pos = extra;
        end = pos + sizeof(extra);
        ifname[0] = '\0';

        attrlen = len;
        attr = (struct rtattr *) buf;
        while (RTA_OK(attr, attrlen)) {
                switch (attr->rta_type) {
                case IFLA_IFNAME:
                        if (RTA_PAYLOAD(attr) >= IFNAMSIZ)
                                break;
                        os_memcpy(ifname, RTA_DATA(attr), RTA_PAYLOAD(attr));
                        ifname[RTA_PAYLOAD(attr)] = '\0';
                        break;
                case IFLA_MASTER:
                        brid = nla_get_u32((struct nlattr *) attr);
                        pos += os_snprintf(pos, end - pos, " master=%u", brid);
                        break;
                case IFLA_OPERSTATE:
                        pos += os_snprintf(pos, end - pos, " operstate=%u",
                                           nla_get_u32((struct nlattr *) attr));
                        break;
                case IFLA_LINKMODE:
                        pos += os_snprintf(pos, end - pos, " linkmode=%u",
                                           nla_get_u32((struct nlattr *) attr));
                        break;
                }
                attr = RTA_NEXT(attr, attrlen);
        }
        extra[sizeof(extra) - 1] = '\0';

        wpa_printf(MSG_DEBUG, "RTM_DELLINK: ifi_index=%d ifname=%s%s ifi_family=%d ifi_flags=0x%x (%s%s%s%s)",
                   ifi->ifi_index, ifname, extra, ifi->ifi_family,
                   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]" : "");

        drv = nl80211_find_drv(global, ifi->ifi_index, buf, len);

        if (ifi->ifi_family == AF_BRIDGE && brid && drv) {
                /* device has been removed from bridge */
                char namebuf[IFNAMSIZ];

                if (!if_indextoname(brid, namebuf)) {
                        wpa_printf(MSG_DEBUG,
                                   "nl80211: Could not find bridge ifname for ifindex %u",
                                   brid);
                } else {
                        wpa_printf(MSG_DEBUG,
                                   "nl80211: Remove ifindex %u for bridge %s",
                                   brid, namebuf);
                }
                del_ifidx(drv, brid, ifi->ifi_index);
        }

        if (ifi->ifi_family != AF_BRIDGE || !brid)
                wpa_driver_nl80211_event_dellink(global, drv, ifi->ifi_index,
                                                 ifname);
}


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

        msg = nl80211_drv_msg(drv, NLM_F_DUMP, NL80211_CMD_GET_SCAN);
        os_memset(&arg, 0, sizeof(arg));
        arg.drv = drv;
        ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
        if (ret == 0) {
                unsigned int freq = drv->nlmode == NL80211_IFTYPE_ADHOC ?
                        arg.ibss_freq : arg.assoc_freq;
                wpa_printf(MSG_DEBUG, "nl80211: Operating frequency for the "
                           "associated BSS from scan results: %u MHz", freq);
                if (freq)
                        drv->assoc_freq = freq;
                return drv->assoc_freq;
        }
        wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
                   "(%s)", ret, strerror(-ret));
        return drv->assoc_freq;
}


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 },
                [NL80211_STA_INFO_SIGNAL_AVG] = { .type = NLA_U8 },
                [NL80211_STA_INFO_BEACON_SIGNAL_AVG] = { .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_SIGNAL_AVG])
                sig_change->avg_signal =
                        (s8) nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL_AVG]);
        else
                sig_change->avg_signal = 0;

        if (sinfo[NL80211_STA_INFO_BEACON_SIGNAL_AVG])
                sig_change->avg_beacon_signal =
                        (s8)
                        nla_get_u8(sinfo[NL80211_STA_INFO_BEACON_SIGNAL_AVG]);
        else
                sig_change->avg_beacon_signal = 0;

        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;
}


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;

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_GET_STATION)) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        return send_and_recv_msgs(drv, msg, get_link_signal, sig);
}


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;
}


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 = nl80211_drv_msg(drv, NLM_F_DUMP, NL80211_CMD_GET_SURVEY);
        return send_and_recv_msgs(drv, msg, get_link_noise, sig_change);
}


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

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

        res = nl_recvmsgs(handle, cb);
        if (res < 0) {
                wpa_printf(MSG_INFO, "nl80211: %s->nl_recvmsgs failed: %d",
                           __func__, res);
        }
}


/**
 * 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';

        if (!nl80211_cmd(drv, msg, 0, NL80211_CMD_REQ_SET_REG) ||
            nla_put_string(msg, NL80211_ATTR_REG_ALPHA2, alpha2)) {
                nlmsg_free(msg);
                return -EINVAL;
        }
        if (send_and_recv_msgs(drv, msg, NULL, NULL))
                return -EINVAL;
        return 0;
}


static int nl80211_get_country(struct nl_msg *msg, void *arg)
{
        char *alpha2 = arg;
        struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
        struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));

        nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
                  genlmsg_attrlen(gnlh, 0), NULL);
        if (!tb_msg[NL80211_ATTR_REG_ALPHA2]) {
                wpa_printf(MSG_DEBUG, "nl80211: No country information available");
                return NL_SKIP;
        }
        os_strlcpy(alpha2, nla_data(tb_msg[NL80211_ATTR_REG_ALPHA2]), 3);
        return NL_SKIP;
}


static int wpa_driver_nl80211_get_country(void *priv, char *alpha2)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;

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

        nl80211_cmd(drv, msg, 0, NL80211_CMD_GET_REG);
        alpha2[0] = '\0';
        ret = send_and_recv_msgs(drv, msg, nl80211_get_country, alpha2);
        if (!alpha2[0])
                ret = -1;

        return ret;
}


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 */
        }

        ret = nl_get_multicast_id(global, "nl80211", "vendor");
        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 vendor events: %d (%s)",
                           ret, strerror(-ret));
                /* Continue without vendor 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);

        nl80211_register_eloop_read(&global->nl_event,
                                    wpa_driver_nl80211_event_receive,
                                    global->nl_cb);

        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 void nl80211_check_global(struct nl80211_global *global)
{
        struct nl_handle *handle;
        const char *groups[] = { "scan", "mlme", "regulatory", "vendor", NULL };
        int ret;
        unsigned int i;

        /*
         * Try to re-add memberships to handle case of cfg80211 getting reloaded
         * and all registration having been cleared.
         */
        handle = (void *) (((intptr_t) global->nl_event) ^
                           ELOOP_SOCKET_INVALID);

        for (i = 0; groups[i]; i++) {
                ret = nl_get_multicast_id(global, "nl80211", groups[i]);
                if (ret >= 0)
                        ret = nl_socket_add_membership(handle, ret);
                if (ret < 0) {
                        wpa_printf(MSG_INFO,
                                   "nl80211: Could not re-add multicast membership for %s events: %d (%s)",
                                   groups[i], ret, strerror(-ret));
                }
        }
}


static void wpa_driver_nl80211_rfkill_blocked(void *ctx)
{
        struct wpa_driver_nl80211_data *drv = ctx;

        wpa_printf(MSG_DEBUG, "nl80211: RFKILL blocked");

        /*
         * rtnetlink ifdown handler will report interfaces other than the P2P
         * Device interface as disabled.
         */
        if (drv->nlmode == NL80211_IFTYPE_P2P_DEVICE)
                wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
}


static void wpa_driver_nl80211_rfkill_unblocked(void *ctx)
{
        struct wpa_driver_nl80211_data *drv = ctx;
        wpa_printf(MSG_DEBUG, "nl80211: RFKILL unblocked");
        if (i802_set_iface_flags(drv->first_bss, 1)) {
                wpa_printf(MSG_DEBUG, "nl80211: Could not set interface UP "
                           "after rfkill unblock");
                return;
        }

        if (is_p2p_net_interface(drv->nlmode))
                nl80211_disable_11b_rates(drv, drv->ifindex, 1);

        /*
         * rtnetlink ifup handler will report interfaces other than the P2P
         * Device interface as enabled.
         */
        if (drv->nlmode == NL80211_IFTYPE_P2P_DEVICE)
                wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL);
}


static void wpa_driver_nl80211_handle_eapol_tx_status(int sock,
                                                      void *eloop_ctx,
                                                      void *handle)
{
        struct wpa_driver_nl80211_data *drv = eloop_ctx;
        u8 data[2048];
        struct msghdr msg;
        struct iovec entry;
        u8 control[512];
        struct cmsghdr *cmsg;
        int res, found_ee = 0, found_wifi = 0, acked = 0;
        union wpa_event_data event;

        memset(&msg, 0, sizeof(msg));
        msg.msg_iov = &entry;
        msg.msg_iovlen = 1;
        entry.iov_base = data;
        entry.iov_len = sizeof(data);
        msg.msg_control = &control;
        msg.msg_controllen = sizeof(control);

        res = recvmsg(sock, &msg, MSG_ERRQUEUE);
        /* if error or not fitting 802.3 header, return */
        if (res < 14)
                return;

        for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg))
        {
                if (cmsg->cmsg_level == SOL_SOCKET &&
                    cmsg->cmsg_type == SCM_WIFI_STATUS) {
                        int *ack;

                        found_wifi = 1;
                        ack = (void *)CMSG_DATA(cmsg);
                        acked = *ack;
                }

                if (cmsg->cmsg_level == SOL_PACKET &&
                    cmsg->cmsg_type == PACKET_TX_TIMESTAMP) {
                        struct sock_extended_err *err =
                                (struct sock_extended_err *)CMSG_DATA(cmsg);

                        if (err->ee_origin == SO_EE_ORIGIN_TXSTATUS)
                                found_ee = 1;
                }
        }

        if (!found_ee || !found_wifi)
                return;

        memset(&event, 0, sizeof(event));
        event.eapol_tx_status.dst = data;
        event.eapol_tx_status.data = data + 14;
        event.eapol_tx_status.data_len = res - 14;
        event.eapol_tx_status.ack = acked;
        wpa_supplicant_event(drv->ctx, EVENT_EAPOL_TX_STATUS, &event);
}


static int nl80211_init_bss(struct i802_bss *bss)
{
        bss->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
        if (!bss->nl_cb)
                return -1;

        nl_cb_set(bss->nl_cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM,
                  no_seq_check, NULL);
        nl_cb_set(bss->nl_cb, NL_CB_VALID, NL_CB_CUSTOM,
                  process_bss_event, bss);

        return 0;
}


static void nl80211_destroy_bss(struct i802_bss *bss)
{
        nl_cb_put(bss->nl_cb);
        bss->nl_cb = NULL;
}


static void
wpa_driver_nl80211_drv_init_rfkill(struct wpa_driver_nl80211_data *drv)
{
        struct rfkill_config *rcfg;

        if (drv->rfkill)
                return;

        rcfg = os_zalloc(sizeof(*rcfg));
        if (!rcfg)
                return;

        rcfg->ctx = drv;

        /* rfkill uses netdev sysfs for initialization. However, P2P Device is
         * not associated with a netdev, so use the name of some other interface
         * sharing the same wiphy as the P2P Device interface.
         *
         * Note: This is valid, as a P2P Device interface is always dynamically
         * created and is created only once another wpa_s interface was added.
         */
        if (drv->nlmode == NL80211_IFTYPE_P2P_DEVICE) {
                struct nl80211_global *global = drv->global;
                struct wpa_driver_nl80211_data *tmp1;

                dl_list_for_each(tmp1, &global->interfaces,
                                 struct wpa_driver_nl80211_data, list) {
                        if (drv == tmp1 || drv->wiphy_idx != tmp1->wiphy_idx ||
                            !tmp1->rfkill)
                                continue;

                        wpa_printf(MSG_DEBUG,
                                   "nl80211: Use (%s) to initialize P2P Device rfkill",
                                   tmp1->first_bss->ifname);
                        os_strlcpy(rcfg->ifname, tmp1->first_bss->ifname,
                                   sizeof(rcfg->ifname));
                        break;
                }
        } else {
                os_strlcpy(rcfg->ifname, drv->first_bss->ifname,
                           sizeof(rcfg->ifname));
        }

        rcfg->blocked_cb = wpa_driver_nl80211_rfkill_blocked;
        rcfg->unblocked_cb = wpa_driver_nl80211_rfkill_unblocked;
        drv->rfkill = rfkill_init(rcfg);
        if (!drv->rfkill) {
                wpa_printf(MSG_DEBUG, "nl80211: RFKILL status not available");
                os_free(rcfg);
        }
}


static void * wpa_driver_nl80211_drv_init(void *ctx, const char *ifname,
                                          void *global_priv, int hostapd,
                                          const u8 *set_addr,
                                          const char *driver_params)
{
        struct wpa_driver_nl80211_data *drv;
        struct i802_bss *bss;

        if (global_priv == NULL)
                return NULL;
        drv = os_zalloc(sizeof(*drv));
        if (drv == NULL)
                return NULL;
        drv->global = global_priv;
        drv->ctx = ctx;
        drv->hostapd = !!hostapd;
        drv->eapol_sock = -1;

        /*
         * There is no driver capability flag for this, so assume it is
         * supported and disable this on first attempt to use if the driver
         * rejects the command due to missing support.
         */
        drv->set_rekey_offload = 1;

        drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
        drv->if_indices = drv->default_if_indices;
        drv->if_indices_reason = drv->default_if_indices_reason;

        drv->first_bss = os_zalloc(sizeof(*drv->first_bss));
        if (!drv->first_bss) {
                os_free(drv);
                return NULL;
        }
        bss = drv->first_bss;
        bss->drv = drv;
        bss->ctx = ctx;

        os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
        drv->monitor_ifidx = -1;
        drv->monitor_sock = -1;
        drv->eapol_tx_sock = -1;
        drv->ap_scan_as_station = NL80211_IFTYPE_UNSPECIFIED;

        if (nl80211_init_bss(bss))
                goto failed;

        if (wpa_driver_nl80211_finish_drv_init(drv, set_addr, 1, driver_params))
                goto failed;

        drv->eapol_tx_sock = socket(PF_PACKET, SOCK_DGRAM, 0);
        if (drv->eapol_tx_sock < 0)
                goto failed;

        if (drv->data_tx_status) {
                int enabled = 1;

                if (setsockopt(drv->eapol_tx_sock, SOL_SOCKET, SO_WIFI_STATUS,
                               &enabled, sizeof(enabled)) < 0) {
                        wpa_printf(MSG_DEBUG,
                                "nl80211: wifi status sockopt failed\n");
                        drv->data_tx_status = 0;
                        if (!drv->use_monitor)
                                drv->capa.flags &=
                                        ~WPA_DRIVER_FLAGS_EAPOL_TX_STATUS;
                } else {
                        eloop_register_read_sock(drv->eapol_tx_sock,
                                wpa_driver_nl80211_handle_eapol_tx_status,
                                drv, NULL);
                }
        }

        if (drv->global) {
                nl80211_check_global(drv->global);
                dl_list_add(&drv->global->interfaces, &drv->list);
                drv->in_interface_list = 1;
        }

        return bss;

failed:
        wpa_driver_nl80211_deinit(bss);
        return NULL;
}


/**
 * wpa_driver_nl80211_init - Initialize nl80211 driver interface
 * @ctx: context to be used when calling wpa_supplicant functions,
 * e.g., wpa_supplicant_event()
 * @ifname: interface name, e.g., wlan0
 * @global_priv: private driver global data from global_init()
 * Returns: Pointer to private data, %NULL on failure
 */
static void * wpa_driver_nl80211_init(void *ctx, const char *ifname,
                                      void *global_priv)
{
        return wpa_driver_nl80211_drv_init(ctx, ifname, global_priv, 0, NULL,
                                           NULL);
}


static int nl80211_register_frame(struct i802_bss *bss,
                                  struct nl_handle *nl_handle,
                                  u16 type, const u8 *match, size_t match_len)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;
        char buf[30];

        buf[0] = '\0';
        wpa_snprintf_hex(buf, sizeof(buf), match, match_len);
        wpa_printf(MSG_DEBUG, "nl80211: Register frame type=0x%x (%s) nl_handle=%p match=%s",
                   type, fc2str(type), nl_handle, buf);

        if (!(msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_REGISTER_ACTION)) ||
            nla_put_u16(msg, NL80211_ATTR_FRAME_TYPE, type) ||
            nla_put(msg, NL80211_ATTR_FRAME_MATCH, match_len, match)) {
                nlmsg_free(msg);
                return -1;
        }

        ret = send_and_recv(drv->global, nl_handle, msg, NULL, NULL);
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: Register frame command "
                           "failed (type=%u): ret=%d (%s)",
                           type, ret, strerror(-ret));
                wpa_hexdump(MSG_DEBUG, "nl80211: Register frame match",
                            match, match_len);
        }
        return ret;
}


static int nl80211_alloc_mgmt_handle(struct i802_bss *bss)
{
        if (bss->nl_mgmt) {
                wpa_printf(MSG_DEBUG, "nl80211: Mgmt reporting "
                           "already on! (nl_mgmt=%p)", bss->nl_mgmt);
                return -1;
        }

        bss->nl_mgmt = nl_create_handle(bss->nl_cb, "mgmt");
        if (bss->nl_mgmt == NULL)
                return -1;

        return 0;
}


static void nl80211_mgmt_handle_register_eloop(struct i802_bss *bss)
{
        nl80211_register_eloop_read(&bss->nl_mgmt,
                                    wpa_driver_nl80211_event_receive,
                                    bss->nl_cb);
}


static int nl80211_register_action_frame(struct i802_bss *bss,
                                         const u8 *match, size_t match_len)
{
        u16 type = (WLAN_FC_TYPE_MGMT << 2) | (WLAN_FC_STYPE_ACTION << 4);
        return nl80211_register_frame(bss, bss->nl_mgmt,
                                      type, match, match_len);
}


static int nl80211_mgmt_subscribe_non_ap(struct i802_bss *bss)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        int ret = 0;

        if (nl80211_alloc_mgmt_handle(bss))
                return -1;
        wpa_printf(MSG_DEBUG, "nl80211: Subscribe to mgmt frames with non-AP "
                   "handle %p", bss->nl_mgmt);

        if (drv->nlmode == NL80211_IFTYPE_ADHOC) {
                u16 type = (WLAN_FC_TYPE_MGMT << 2) | (WLAN_FC_STYPE_AUTH << 4);

                /* register for any AUTH message */
                nl80211_register_frame(bss, bss->nl_mgmt, type, NULL, 0);
        }

#ifdef CONFIG_INTERWORKING
        /* QoS Map Configure */
        if (nl80211_register_action_frame(bss, (u8 *) "\x01\x04", 2) < 0)
                ret = -1;
#endif /* CONFIG_INTERWORKING */
#if defined(CONFIG_P2P) || defined(CONFIG_INTERWORKING)
        /* GAS Initial Request */
        if (nl80211_register_action_frame(bss, (u8 *) "\x04\x0a", 2) < 0)
                ret = -1;
        /* GAS Initial Response */
        if (nl80211_register_action_frame(bss, (u8 *) "\x04\x0b", 2) < 0)
                ret = -1;
        /* GAS Comeback Request */
        if (nl80211_register_action_frame(bss, (u8 *) "\x04\x0c", 2) < 0)
                ret = -1;
        /* GAS Comeback Response */
        if (nl80211_register_action_frame(bss, (u8 *) "\x04\x0d", 2) < 0)
                ret = -1;
        /* Protected GAS Initial Request */
        if (nl80211_register_action_frame(bss, (u8 *) "\x09\x0a", 2) < 0)
                ret = -1;
        /* Protected GAS Initial Response */
        if (nl80211_register_action_frame(bss, (u8 *) "\x09\x0b", 2) < 0)
                ret = -1;
        /* Protected GAS Comeback Request */
        if (nl80211_register_action_frame(bss, (u8 *) "\x09\x0c", 2) < 0)
                ret = -1;
        /* Protected GAS Comeback Response */
        if (nl80211_register_action_frame(bss, (u8 *) "\x09\x0d", 2) < 0)
                ret = -1;
#endif /* CONFIG_P2P || CONFIG_INTERWORKING */
#ifdef CONFIG_P2P
        /* P2P Public Action */
        if (nl80211_register_action_frame(bss,
                                          (u8 *) "\x04\x09\x50\x6f\x9a\x09",
                                          6) < 0)
                ret = -1;
        /* P2P Action */
        if (nl80211_register_action_frame(bss,
                                          (u8 *) "\x7f\x50\x6f\x9a\x09",
                                          5) < 0)
                ret = -1;
#endif /* CONFIG_P2P */
#ifdef CONFIG_IEEE80211W
        /* SA Query Response */
        if (nl80211_register_action_frame(bss, (u8 *) "\x08\x01", 2) < 0)
                ret = -1;
#endif /* CONFIG_IEEE80211W */
#ifdef CONFIG_TDLS
        if ((drv->capa.flags & WPA_DRIVER_FLAGS_TDLS_SUPPORT)) {
                /* TDLS Discovery Response */
                if (nl80211_register_action_frame(bss, (u8 *) "\x04\x0e", 2) <
                    0)
                        ret = -1;
        }
#endif /* CONFIG_TDLS */
#ifdef CONFIG_FST
        /* FST Action frames */
        if (nl80211_register_action_frame(bss, (u8 *) "\x12", 1) < 0)
                ret = -1;
#endif /* CONFIG_FST */

        /* FT Action frames */
        if (nl80211_register_action_frame(bss, (u8 *) "\x06", 1) < 0)
                ret = -1;
        else
                drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
                        WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;

        /* WNM - BSS Transition Management Request */
        if (nl80211_register_action_frame(bss, (u8 *) "\x0a\x07", 2) < 0)
                ret = -1;
        /* WNM-Sleep Mode Response */
        if (nl80211_register_action_frame(bss, (u8 *) "\x0a\x11", 2) < 0)
                ret = -1;

#ifdef CONFIG_HS20
        /* WNM-Notification */
        if (nl80211_register_action_frame(bss, (u8 *) "\x0a\x1a", 2) < 0)
                ret = -1;
#endif /* CONFIG_HS20 */

        /* WMM-AC ADDTS Response */
        if (nl80211_register_action_frame(bss, (u8 *) "\x11\x01", 2) < 0)
                ret = -1;

        /* WMM-AC DELTS */
        if (nl80211_register_action_frame(bss, (u8 *) "\x11\x02", 2) < 0)
                ret = -1;

        /* Radio Measurement - Neighbor Report Response */
        if (nl80211_register_action_frame(bss, (u8 *) "\x05\x05", 2) < 0)
                ret = -1;

        /* Radio Measurement - Link Measurement Request */
        if ((drv->capa.rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION) &&
            (nl80211_register_action_frame(bss, (u8 *) "\x05\x02", 2) < 0))
                ret = -1;

        nl80211_mgmt_handle_register_eloop(bss);

        return ret;
}


static int nl80211_mgmt_subscribe_mesh(struct i802_bss *bss)
{
        int ret = 0;

        if (nl80211_alloc_mgmt_handle(bss))
                return -1;

        wpa_printf(MSG_DEBUG,
                   "nl80211: Subscribe to mgmt frames with mesh handle %p",
                   bss->nl_mgmt);

        /* Auth frames for mesh SAE */
        if (nl80211_register_frame(bss, bss->nl_mgmt,
                                   (WLAN_FC_TYPE_MGMT << 2) |
                                   (WLAN_FC_STYPE_AUTH << 4),
                                   NULL, 0) < 0)
                ret = -1;

        /* Mesh peering open */
        if (nl80211_register_action_frame(bss, (u8 *) "\x0f\x01", 2) < 0)
                ret = -1;
        /* Mesh peering confirm */
        if (nl80211_register_action_frame(bss, (u8 *) "\x0f\x02", 2) < 0)
                ret = -1;
        /* Mesh peering close */
        if (nl80211_register_action_frame(bss, (u8 *) "\x0f\x03", 2) < 0)
                ret = -1;

        nl80211_mgmt_handle_register_eloop(bss);

        return ret;
}


static int nl80211_register_spurious_class3(struct i802_bss *bss)
{
        struct nl_msg *msg;
        int ret;

        msg = nl80211_bss_msg(bss, 0, NL80211_CMD_UNEXPECTED_FRAME);
        ret = send_and_recv(bss->drv->global, bss->nl_mgmt, msg, NULL, NULL);
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: Register spurious class3 "
                           "failed: ret=%d (%s)",
                           ret, strerror(-ret));
        }
        return ret;
}


static int nl80211_mgmt_subscribe_ap(struct i802_bss *bss)
{
        static const int stypes[] = {
                WLAN_FC_STYPE_AUTH,
                WLAN_FC_STYPE_ASSOC_REQ,
                WLAN_FC_STYPE_REASSOC_REQ,
                WLAN_FC_STYPE_DISASSOC,
                WLAN_FC_STYPE_DEAUTH,
                WLAN_FC_STYPE_ACTION,
                WLAN_FC_STYPE_PROBE_REQ,
/* Beacon doesn't work as mac80211 doesn't currently allow
 * it, but it wouldn't really be the right thing anyway as
 * it isn't per interface ... maybe just dump the scan
 * results periodically for OLBC?
 */
                /* WLAN_FC_STYPE_BEACON, */
        };
        unsigned int i;

        if (nl80211_alloc_mgmt_handle(bss))
                return -1;
        wpa_printf(MSG_DEBUG, "nl80211: Subscribe to mgmt frames with AP "
                   "handle %p", bss->nl_mgmt);

        for (i = 0; i < ARRAY_SIZE(stypes); i++) {
                if (nl80211_register_frame(bss, bss->nl_mgmt,
                                           (WLAN_FC_TYPE_MGMT << 2) |
                                           (stypes[i] << 4),
                                           NULL, 0) < 0) {
                        goto out_err;
                }
        }

        if (nl80211_register_spurious_class3(bss))
                goto out_err;

        if (nl80211_get_wiphy_data_ap(bss) == NULL)
                goto out_err;

        nl80211_mgmt_handle_register_eloop(bss);
        return 0;

out_err:
        nl_destroy_handles(&bss->nl_mgmt);
        return -1;
}


static int nl80211_mgmt_subscribe_ap_dev_sme(struct i802_bss *bss)
{
        if (nl80211_alloc_mgmt_handle(bss))
                return -1;
        wpa_printf(MSG_DEBUG, "nl80211: Subscribe to mgmt frames with AP "
                   "handle %p (device SME)", bss->nl_mgmt);

        if (nl80211_register_frame(bss, bss->nl_mgmt,
                                   (WLAN_FC_TYPE_MGMT << 2) |
                                   (WLAN_FC_STYPE_ACTION << 4),
                                   NULL, 0) < 0)
                goto out_err;

        nl80211_mgmt_handle_register_eloop(bss);
        return 0;

out_err:
        nl_destroy_handles(&bss->nl_mgmt);
        return -1;
}


static void nl80211_mgmt_unsubscribe(struct i802_bss *bss, const char *reason)
{
        if (bss->nl_mgmt == NULL)
                return;
        wpa_printf(MSG_DEBUG, "nl80211: Unsubscribe mgmt frames handle %p "
                   "(%s)", bss->nl_mgmt, reason);
        nl80211_destroy_eloop_handle(&bss->nl_mgmt);

        nl80211_put_wiphy_data_ap(bss);
}


static void wpa_driver_nl80211_send_rfkill(void *eloop_ctx, void *timeout_ctx)
{
        wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
}


static void nl80211_del_p2pdev(struct i802_bss *bss)
{
        struct nl_msg *msg;
        int ret;

        msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_DEL_INTERFACE);
        ret = send_and_recv_msgs(bss->drv, msg, NULL, NULL);

        wpa_printf(MSG_DEBUG, "nl80211: Delete P2P Device %s (0x%llx): %s",
                   bss->ifname, (long long unsigned int) bss->wdev_id,
                   strerror(-ret));
}


static int nl80211_set_p2pdev(struct i802_bss *bss, int start)
{
        struct nl_msg *msg;
        int ret;

        msg = nl80211_cmd_msg(bss, 0, start ? NL80211_CMD_START_P2P_DEVICE :
                              NL80211_CMD_STOP_P2P_DEVICE);
        ret = send_and_recv_msgs(bss->drv, msg, NULL, NULL);

        wpa_printf(MSG_DEBUG, "nl80211: %s P2P Device %s (0x%llx): %s",
                   start ? "Start" : "Stop",
                   bss->ifname, (long long unsigned int) bss->wdev_id,
                   strerror(-ret));
        return ret;
}


static int i802_set_iface_flags(struct i802_bss *bss, int up)
{
        enum nl80211_iftype nlmode;

        nlmode = nl80211_get_ifmode(bss);
        if (nlmode != NL80211_IFTYPE_P2P_DEVICE) {
                return linux_set_iface_flags(bss->drv->global->ioctl_sock,
                                             bss->ifname, up);
        }

        /* P2P Device has start/stop which is equivalent */
        return nl80211_set_p2pdev(bss, up);
}


#ifdef CONFIG_TESTING_OPTIONS
static int qca_vendor_test_cmd_handler(struct nl_msg *msg, void *arg)
{
        /* struct wpa_driver_nl80211_data *drv = arg; */
        struct nlattr *tb[NL80211_ATTR_MAX + 1];
        struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));


        wpa_printf(MSG_DEBUG,
                   "nl80211: QCA vendor test command response received");

        nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
                  genlmsg_attrlen(gnlh, 0), NULL);
        if (!tb[NL80211_ATTR_VENDOR_DATA]) {
                wpa_printf(MSG_DEBUG, "nl80211: No vendor data attribute");
                return NL_SKIP;
        }

        wpa_hexdump(MSG_DEBUG,
                    "nl80211: Received QCA vendor test command response",
                    nla_data(tb[NL80211_ATTR_VENDOR_DATA]),
                    nla_len(tb[NL80211_ATTR_VENDOR_DATA]));

        return NL_SKIP;
}
#endif /* CONFIG_TESTING_OPTIONS */


static void qca_vendor_test(struct wpa_driver_nl80211_data *drv)
{
#ifdef CONFIG_TESTING_OPTIONS
        struct nl_msg *msg;
        struct nlattr *params;
        int ret;

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_VENDOR)) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, OUI_QCA) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD,
                        QCA_NL80211_VENDOR_SUBCMD_TEST) ||
            !(params = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA)) ||
            nla_put_u32(msg, QCA_WLAN_VENDOR_ATTR_TEST, 123)) {
                nlmsg_free(msg);
                return;
        }
        nla_nest_end(msg, params);

        ret = send_and_recv_msgs(drv, msg, qca_vendor_test_cmd_handler, drv);
        wpa_printf(MSG_DEBUG,
                   "nl80211: QCA vendor test command returned %d (%s)",
                   ret, strerror(-ret));
#endif /* CONFIG_TESTING_OPTIONS */
}


static int
wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv,
                                   const u8 *set_addr, int first,
                                   const char *driver_params)
{
        struct i802_bss *bss = drv->first_bss;
        int send_rfkill_event = 0;
        enum nl80211_iftype nlmode;

        drv->ifindex = if_nametoindex(bss->ifname);
        bss->ifindex = drv->ifindex;
        bss->wdev_id = drv->global->if_add_wdevid;
        bss->wdev_id_set = drv->global->if_add_wdevid_set;

        bss->if_dynamic = drv->ifindex == drv->global->if_add_ifindex;
        bss->if_dynamic = bss->if_dynamic || drv->global->if_add_wdevid_set;
        drv->global->if_add_wdevid_set = 0;

        if (!bss->if_dynamic && nl80211_get_ifmode(bss) == NL80211_IFTYPE_AP)
                bss->static_ap = 1;

        if (first &&
            nl80211_get_ifmode(bss) != NL80211_IFTYPE_P2P_DEVICE &&
            linux_iface_up(drv->global->ioctl_sock, bss->ifname) > 0)
                drv->start_iface_up = 1;

        if (wpa_driver_nl80211_capa(drv))
                return -1;

        if (driver_params && nl80211_set_param(bss, driver_params) < 0)
                return -1;

        wpa_printf(MSG_DEBUG, "nl80211: interface %s in phy %s",
                   bss->ifname, drv->phyname);

        if (set_addr &&
            (linux_set_iface_flags(drv->global->ioctl_sock, bss->ifname, 0) ||
             linux_set_ifhwaddr(drv->global->ioctl_sock, bss->ifname,
                                set_addr)))
                return -1;

        if (first && nl80211_get_ifmode(bss) == NL80211_IFTYPE_AP)
                drv->start_mode_ap = 1;

        if (drv->hostapd || bss->static_ap)
                nlmode = NL80211_IFTYPE_AP;
        else if (bss->if_dynamic)
                nlmode = nl80211_get_ifmode(bss);
        else
                nlmode = NL80211_IFTYPE_STATION;

        if (wpa_driver_nl80211_set_mode(bss, nlmode) < 0) {
                wpa_printf(MSG_ERROR, "nl80211: Could not configure driver mode");
                return -1;
        }

        if (nlmode == NL80211_IFTYPE_P2P_DEVICE)
                nl80211_get_macaddr(bss);

        wpa_driver_nl80211_drv_init_rfkill(drv);

        if (!rfkill_is_blocked(drv->rfkill)) {
                int ret = i802_set_iface_flags(bss, 1);
                if (ret) {
                        wpa_printf(MSG_ERROR, "nl80211: Could not set "
                                   "interface '%s' UP", bss->ifname);
                        return ret;
                }

                if (is_p2p_net_interface(nlmode))
                        nl80211_disable_11b_rates(bss->drv,
                                                  bss->drv->ifindex, 1);

                if (nlmode == NL80211_IFTYPE_P2P_DEVICE)
                        return ret;
        } else {
                wpa_printf(MSG_DEBUG, "nl80211: Could not yet enable "
                           "interface '%s' due to rfkill", bss->ifname);
                if (nlmode != NL80211_IFTYPE_P2P_DEVICE)
                        drv->if_disabled = 1;

                send_rfkill_event = 1;
        }

        if (!drv->hostapd && nlmode != NL80211_IFTYPE_P2P_DEVICE)
                netlink_send_oper_ifla(drv->global->netlink, drv->ifindex,
                                       1, IF_OPER_DORMANT);

        if (nlmode != NL80211_IFTYPE_P2P_DEVICE) {
                if (linux_get_ifhwaddr(drv->global->ioctl_sock, bss->ifname,
                                       bss->addr))
                        return -1;
                os_memcpy(drv->perm_addr, bss->addr, ETH_ALEN);
        }

        if (send_rfkill_event) {
                eloop_register_timeout(0, 0, wpa_driver_nl80211_send_rfkill,
                                       drv, drv->ctx);
        }

        if (drv->vendor_cmd_test_avail)
                qca_vendor_test(drv);

        return 0;
}


static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
{
        struct nl_msg *msg;

        wpa_printf(MSG_DEBUG, "nl80211: Remove beacon (ifindex=%d)",
                   drv->ifindex);
        msg = nl80211_drv_msg(drv, 0, NL80211_CMD_DEL_BEACON);
        return send_and_recv_msgs(drv, msg, NULL, NULL);
}


/**
 * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
 * @bss: Pointer to private nl80211 data from wpa_driver_nl80211_init()
 *
 * Shut down driver interface and processing of driver events. Free
 * private data buffer if one was allocated in wpa_driver_nl80211_init().
 */
static void wpa_driver_nl80211_deinit(struct i802_bss *bss)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;

        wpa_printf(MSG_INFO, "nl80211: deinit ifname=%s disabled_11b_rates=%d",
                   bss->ifname, drv->disabled_11b_rates);

        bss->in_deinit = 1;
        if (drv->data_tx_status)
                eloop_unregister_read_sock(drv->eapol_tx_sock);
        if (drv->eapol_tx_sock >= 0)
                close(drv->eapol_tx_sock);

        if (bss->nl_preq)
                wpa_driver_nl80211_probe_req_report(bss, 0);
        if (bss->added_if_into_bridge) {
                if (linux_br_del_if(drv->global->ioctl_sock, bss->brname,
                                    bss->ifname) < 0)
                        wpa_printf(MSG_INFO, "nl80211: Failed to remove "
                                   "interface %s from bridge %s: %s",
                                   bss->ifname, bss->brname, strerror(errno));
                if (drv->rtnl_sk)
                        nl80211_handle_destroy(drv->rtnl_sk);
        }
        if (bss->added_bridge) {
                if (linux_set_iface_flags(drv->global->ioctl_sock, bss->brname,
                                          0) < 0)
                        wpa_printf(MSG_INFO,
                                   "nl80211: Could not set bridge %s down",
                                   bss->brname);
                if (linux_br_del(drv->global->ioctl_sock, bss->brname) < 0)
                        wpa_printf(MSG_INFO, "nl80211: Failed to remove "
                                   "bridge %s: %s",
                                   bss->brname, strerror(errno));
        }

        nl80211_remove_monitor_interface(drv);

        if (is_ap_interface(drv->nlmode))
                wpa_driver_nl80211_del_beacon(drv);

        if (drv->eapol_sock >= 0) {
                eloop_unregister_read_sock(drv->eapol_sock);
                close(drv->eapol_sock);
        }

        if (drv->if_indices != drv->default_if_indices)
                os_free(drv->if_indices);

        if (drv->if_indices_reason != drv->default_if_indices_reason)
                os_free(drv->if_indices_reason);

        if (drv->disabled_11b_rates)
                nl80211_disable_11b_rates(drv, drv->ifindex, 0);

        netlink_send_oper_ifla(drv->global->netlink, drv->ifindex, 0,
                               IF_OPER_UP);
        eloop_cancel_timeout(wpa_driver_nl80211_send_rfkill, drv, drv->ctx);
        rfkill_deinit(drv->rfkill);

        eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);

        if (!drv->start_iface_up)
                (void) i802_set_iface_flags(bss, 0);

        if (drv->addr_changed) {
                if (linux_set_iface_flags(drv->global->ioctl_sock, bss->ifname,
                                          0) < 0) {
                        wpa_printf(MSG_DEBUG,
                                   "nl80211: Could not set interface down to restore permanent MAC address");
                }
                if (linux_set_ifhwaddr(drv->global->ioctl_sock, bss->ifname,
                                       drv->perm_addr) < 0) {
                        wpa_printf(MSG_DEBUG,
                                   "nl80211: Could not restore permanent MAC address");
                }
        }

        if (drv->nlmode != NL80211_IFTYPE_P2P_DEVICE) {
                if (!drv->hostapd || !drv->start_mode_ap)
                        wpa_driver_nl80211_set_mode(bss,
                                                    NL80211_IFTYPE_STATION);
                nl80211_mgmt_unsubscribe(bss, "deinit");
        } else {
                nl80211_mgmt_unsubscribe(bss, "deinit");
                nl80211_del_p2pdev(bss);
        }

        nl80211_destroy_bss(drv->first_bss);

        os_free(drv->filter_ssids);

        os_free(drv->auth_ie);

        if (drv->in_interface_list)
                dl_list_del(&drv->list);

        os_free(drv->extended_capa);
        os_free(drv->extended_capa_mask);
        os_free(drv->first_bss);
        os_free(drv);
}


static u32 wpa_alg_to_cipher_suite(enum wpa_alg alg, size_t key_len)
{
        switch (alg) {
        case WPA_ALG_WEP:
                if (key_len == 5)
                        return WLAN_CIPHER_SUITE_WEP40;
                return WLAN_CIPHER_SUITE_WEP104;
        case WPA_ALG_TKIP:
                return WLAN_CIPHER_SUITE_TKIP;
        case WPA_ALG_CCMP:
                return WLAN_CIPHER_SUITE_CCMP;
        case WPA_ALG_GCMP:
                return WLAN_CIPHER_SUITE_GCMP;
        case WPA_ALG_CCMP_256:
                return WLAN_CIPHER_SUITE_CCMP_256;
        case WPA_ALG_GCMP_256:
                return WLAN_CIPHER_SUITE_GCMP_256;
        case WPA_ALG_IGTK:
                return WLAN_CIPHER_SUITE_AES_CMAC;
        case WPA_ALG_BIP_GMAC_128:
                return WLAN_CIPHER_SUITE_BIP_GMAC_128;
        case WPA_ALG_BIP_GMAC_256:
                return WLAN_CIPHER_SUITE_BIP_GMAC_256;
        case WPA_ALG_BIP_CMAC_256:
                return WLAN_CIPHER_SUITE_BIP_CMAC_256;
        case WPA_ALG_SMS4:
                return WLAN_CIPHER_SUITE_SMS4;
        case WPA_ALG_KRK:
                return WLAN_CIPHER_SUITE_KRK;
        case WPA_ALG_NONE:
        case WPA_ALG_PMK:
                wpa_printf(MSG_ERROR, "nl80211: Unexpected encryption algorithm %d",
                           alg);
                return 0;
        }

        wpa_printf(MSG_ERROR, "nl80211: Unsupported encryption algorithm %d",
                   alg);
        return 0;
}


static u32 wpa_cipher_to_cipher_suite(unsigned int cipher)
{
        switch (cipher) {
        case WPA_CIPHER_CCMP_256:
                return WLAN_CIPHER_SUITE_CCMP_256;
        case WPA_CIPHER_GCMP_256:
                return WLAN_CIPHER_SUITE_GCMP_256;
        case WPA_CIPHER_CCMP:
                return WLAN_CIPHER_SUITE_CCMP;
        case WPA_CIPHER_GCMP:
                return WLAN_CIPHER_SUITE_GCMP;
        case WPA_CIPHER_TKIP:
                return WLAN_CIPHER_SUITE_TKIP;
        case WPA_CIPHER_WEP104:
                return WLAN_CIPHER_SUITE_WEP104;
        case WPA_CIPHER_WEP40:
                return WLAN_CIPHER_SUITE_WEP40;
        case WPA_CIPHER_GTK_NOT_USED:
                return WLAN_CIPHER_SUITE_NO_GROUP_ADDR;
        }

        return 0;
}


static int wpa_cipher_to_cipher_suites(unsigned int ciphers, u32 suites[],
                                       int max_suites)
{
        int num_suites = 0;

        if (num_suites < max_suites && ciphers & WPA_CIPHER_CCMP_256)
                suites[num_suites++] = WLAN_CIPHER_SUITE_CCMP_256;
        if (num_suites < max_suites && ciphers & WPA_CIPHER_GCMP_256)
                suites[num_suites++] = WLAN_CIPHER_SUITE_GCMP_256;
        if (num_suites < max_suites && ciphers & WPA_CIPHER_CCMP)
                suites[num_suites++] = WLAN_CIPHER_SUITE_CCMP;
        if (num_suites < max_suites && ciphers & WPA_CIPHER_GCMP)
                suites[num_suites++] = WLAN_CIPHER_SUITE_GCMP;
        if (num_suites < max_suites && ciphers & WPA_CIPHER_TKIP)
                suites[num_suites++] = WLAN_CIPHER_SUITE_TKIP;
        if (num_suites < max_suites && ciphers & WPA_CIPHER_WEP104)
                suites[num_suites++] = WLAN_CIPHER_SUITE_WEP104;
        if (num_suites < max_suites && ciphers & WPA_CIPHER_WEP40)
                suites[num_suites++] = WLAN_CIPHER_SUITE_WEP40;

        return num_suites;
}


#ifdef CONFIG_DRIVER_NL80211_QCA
static int issue_key_mgmt_set_key(struct wpa_driver_nl80211_data *drv,
                                  const u8 *key, size_t key_len)
{
        struct nl_msg *msg;
        int ret;

        if (!(drv->capa.flags & WPA_DRIVER_FLAGS_KEY_MGMT_OFFLOAD))
                return 0;

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_VENDOR)) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, OUI_QCA) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD,
                        QCA_NL80211_VENDOR_SUBCMD_KEY_MGMT_SET_KEY) ||
            nla_put(msg, NL80211_ATTR_VENDOR_DATA, key_len, key)) {
                nl80211_nlmsg_clear(msg);
                nlmsg_free(msg);
                return -1;
        }
        ret = send_and_recv_msgs(drv, msg, NULL, (void *) -1);
        if (ret) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Key management set key failed: ret=%d (%s)",
                           ret, strerror(-ret));
        }

        return ret;
}
#endif /* CONFIG_DRIVER_NL80211_QCA */


static int wpa_driver_nl80211_set_key(const char *ifname, struct i802_bss *bss,
                                      enum wpa_alg alg, const u8 *addr,
                                      int key_idx, int set_tx,
                                      const u8 *seq, size_t seq_len,
                                      const u8 *key, size_t key_len)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        int ifindex;
        struct nl_msg *msg = NULL;
        int ret;
        int tdls = 0;

        /* Ignore for P2P Device */
        if (drv->nlmode == NL80211_IFTYPE_P2P_DEVICE)
                return 0;

        ifindex = if_nametoindex(ifname);
        wpa_printf(MSG_DEBUG, "%s: ifindex=%d (%s) alg=%d addr=%p key_idx=%d "
                   "set_tx=%d seq_len=%lu key_len=%lu",
                   __func__, ifindex, ifname, alg, addr, key_idx, set_tx,
                   (unsigned long) seq_len, (unsigned long) key_len);
#ifdef CONFIG_TDLS
        if (key_idx == -1) {
                key_idx = 0;
                tdls = 1;
        }
#endif /* CONFIG_TDLS */

#ifdef CONFIG_DRIVER_NL80211_QCA
        if (alg == WPA_ALG_PMK &&
            (drv->capa.flags & WPA_DRIVER_FLAGS_KEY_MGMT_OFFLOAD)) {
                wpa_printf(MSG_DEBUG, "%s: calling issue_key_mgmt_set_key",
                           __func__);
                ret = issue_key_mgmt_set_key(drv, key, key_len);
                return ret;
        }
#endif /* CONFIG_DRIVER_NL80211_QCA */

        if (alg == WPA_ALG_NONE) {
                msg = nl80211_ifindex_msg(drv, ifindex, 0, NL80211_CMD_DEL_KEY);
                if (!msg)
                        return -ENOBUFS;
        } else {
                u32 suite;

                suite = wpa_alg_to_cipher_suite(alg, key_len);
                if (!suite)
                        goto fail;
                msg = nl80211_ifindex_msg(drv, ifindex, 0, NL80211_CMD_NEW_KEY);
                if (!msg ||
                    nla_put(msg, NL80211_ATTR_KEY_DATA, key_len, key) ||
                    nla_put_u32(msg, NL80211_ATTR_KEY_CIPHER, suite))
                        goto fail;
                wpa_hexdump_key(MSG_DEBUG, "nl80211: KEY_DATA", key, key_len);
        }

        if (seq && seq_len) {
                if (nla_put(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq))
                        goto fail;
                wpa_hexdump(MSG_DEBUG, "nl80211: KEY_SEQ", seq, seq_len);
        }

        if (addr && !is_broadcast_ether_addr(addr)) {
                wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
                if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
                        goto fail;

                if (alg != WPA_ALG_WEP && key_idx && !set_tx) {
                        wpa_printf(MSG_DEBUG, "   RSN IBSS RX GTK");
                        if (nla_put_u32(msg, NL80211_ATTR_KEY_TYPE,
                                        NL80211_KEYTYPE_GROUP))
                                goto fail;
                }
        } else if (addr && is_broadcast_ether_addr(addr)) {
                struct nlattr *types;

                wpa_printf(MSG_DEBUG, "   broadcast key");

                types = nla_nest_start(msg, NL80211_ATTR_KEY_DEFAULT_TYPES);
                if (!types ||
                    nla_put_flag(msg, NL80211_KEY_DEFAULT_TYPE_MULTICAST))
                        goto fail;
                nla_nest_end(msg, types);
        }
        if (nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx))
                goto fail;

        ret = send_and_recv_msgs(drv, msg, NULL, key ? (void *) -1 : NULL);
        if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
                ret = 0;
        if (ret)
                wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
                           ret, strerror(-ret));

        /*
         * If we failed or don't need to set the default TX key (below),
         * we're done here.
         */
        if (ret || !set_tx || alg == WPA_ALG_NONE || tdls)
                return ret;
        if (is_ap_interface(drv->nlmode) && addr &&
            !is_broadcast_ether_addr(addr))
                return ret;

        msg = nl80211_ifindex_msg(drv, ifindex, 0, NL80211_CMD_SET_KEY);
        if (!msg ||
            nla_put_u8(msg, NL80211_ATTR_KEY_IDX, key_idx) ||
            nla_put_flag(msg, (alg == WPA_ALG_IGTK ||
                               alg == WPA_ALG_BIP_GMAC_128 ||
                               alg == WPA_ALG_BIP_GMAC_256 ||
                               alg == WPA_ALG_BIP_CMAC_256) ?
                         NL80211_ATTR_KEY_DEFAULT_MGMT :
                         NL80211_ATTR_KEY_DEFAULT))
                goto fail;
        if (addr && is_broadcast_ether_addr(addr)) {
                struct nlattr *types;

                types = nla_nest_start(msg, NL80211_ATTR_KEY_DEFAULT_TYPES);
                if (!types ||
                    nla_put_flag(msg, NL80211_KEY_DEFAULT_TYPE_MULTICAST))
                        goto fail;
                nla_nest_end(msg, types);
        } else if (addr) {
                struct nlattr *types;

                types = nla_nest_start(msg, NL80211_ATTR_KEY_DEFAULT_TYPES);
                if (!types ||
                    nla_put_flag(msg, NL80211_KEY_DEFAULT_TYPE_UNICAST))
                        goto fail;
                nla_nest_end(msg, types);
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret == -ENOENT)
                ret = 0;
        if (ret)
                wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
                           "err=%d %s)", ret, strerror(-ret));
        return ret;

fail:
        nl80211_nlmsg_clear(msg);
        nlmsg_free(msg);
        return -ENOBUFS;
}


static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
                      int key_idx, int defkey,
                      const u8 *seq, size_t seq_len,
                      const u8 *key, size_t key_len)
{
        struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
        u32 suite;

        if (!key_attr)
                return -1;

        suite = wpa_alg_to_cipher_suite(alg, key_len);
        if (!suite)
                return -1;

        if (defkey && alg == WPA_ALG_IGTK) {
                if (nla_put_flag(msg, NL80211_KEY_DEFAULT_MGMT))
                        return -1;
        } else if (defkey) {
                if (nla_put_flag(msg, NL80211_KEY_DEFAULT))
                        return -1;
        }

        if (nla_put_u8(msg, NL80211_KEY_IDX, key_idx) ||
            nla_put_u32(msg, NL80211_KEY_CIPHER, suite) ||
            (seq && seq_len &&
             nla_put(msg, NL80211_KEY_SEQ, seq_len, seq)) ||
            nla_put(msg, NL80211_KEY_DATA, key_len, key))
                return -1;

        nla_nest_end(msg, key_attr);

        return 0;
}


static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
                                 struct nl_msg *msg)
{
        int i, privacy = 0;
        struct nlattr *nl_keys, *nl_key;

        for (i = 0; i < 4; i++) {
                if (!params->wep_key[i])
                        continue;
                privacy = 1;
                break;
        }
        if (params->wps == WPS_MODE_PRIVACY)
                privacy = 1;
        if (params->pairwise_suite &&
            params->pairwise_suite != WPA_CIPHER_NONE)
                privacy = 1;

        if (!privacy)
                return 0;

        if (nla_put_flag(msg, NL80211_ATTR_PRIVACY))
                return -ENOBUFS;

        nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
        if (!nl_keys)
                return -ENOBUFS;

        for (i = 0; i < 4; i++) {
                if (!params->wep_key[i])
                        continue;

                nl_key = nla_nest_start(msg, i);
                if (!nl_key ||
                    nla_put(msg, NL80211_KEY_DATA, params->wep_key_len[i],
                            params->wep_key[i]) ||
                    nla_put_u32(msg, NL80211_KEY_CIPHER,
                                params->wep_key_len[i] == 5 ?
                                WLAN_CIPHER_SUITE_WEP40 :
                                WLAN_CIPHER_SUITE_WEP104) ||
                    nla_put_u8(msg, NL80211_KEY_IDX, i) ||
                    (i == params->wep_tx_keyidx &&
                     nla_put_flag(msg, NL80211_KEY_DEFAULT)))
                        return -ENOBUFS;

                nla_nest_end(msg, nl_key);
        }
        nla_nest_end(msg, nl_keys);

        return 0;
}


int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
                            const u8 *addr, int cmd, u16 reason_code,
                            int local_state_change)
{
        int ret;
        struct nl_msg *msg;

        if (!(msg = nl80211_drv_msg(drv, 0, cmd)) ||
            nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code) ||
            (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
            (local_state_change &&
             nla_put_flag(msg, NL80211_ATTR_LOCAL_STATE_CHANGE))) {
                nlmsg_free(msg);
                return -1;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret) {
                wpa_dbg(drv->ctx, MSG_DEBUG,
                        "nl80211: MLME command failed: reason=%u ret=%d (%s)",
                        reason_code, ret, strerror(-ret));
        }
        return ret;
}


static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
                                         int reason_code)
{
        int ret;

        wpa_printf(MSG_DEBUG, "%s(reason_code=%d)", __func__, reason_code);
        nl80211_mark_disconnected(drv);
        /* Disconnect command doesn't need BSSID - it uses cached value */
        ret = wpa_driver_nl80211_mlme(drv, NULL, NL80211_CMD_DISCONNECT,
                                      reason_code, 0);
        /*
         * For locally generated disconnect, supplicant already generates a
         * DEAUTH event, so ignore the event from NL80211.
         */
        drv->ignore_next_local_disconnect = ret == 0;

        return ret;
}


static int wpa_driver_nl80211_deauthenticate(struct i802_bss *bss,
                                             const u8 *addr, int reason_code)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        int ret;

        if (drv->nlmode == NL80211_IFTYPE_ADHOC) {
                nl80211_mark_disconnected(drv);
                return nl80211_leave_ibss(drv, 1);
        }
        if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
                return wpa_driver_nl80211_disconnect(drv, reason_code);
        wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
                   __func__, MAC2STR(addr), reason_code);
        nl80211_mark_disconnected(drv);
        ret = wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
                                      reason_code, 0);
        /*
         * For locally generated deauthenticate, supplicant already generates a
         * DEAUTH event, so ignore the event from NL80211.
         */
        drv->ignore_next_local_deauth = ret == 0;
        return ret;
}


static void nl80211_copy_auth_params(struct wpa_driver_nl80211_data *drv,
                                     struct wpa_driver_auth_params *params)
{
        int i;

        drv->auth_freq = params->freq;
        drv->auth_alg = params->auth_alg;
        drv->auth_wep_tx_keyidx = params->wep_tx_keyidx;
        drv->auth_local_state_change = params->local_state_change;
        drv->auth_p2p = params->p2p;

        if (params->bssid)
                os_memcpy(drv->auth_bssid_, params->bssid, ETH_ALEN);
        else
                os_memset(drv->auth_bssid_, 0, ETH_ALEN);

        if (params->ssid) {
                os_memcpy(drv->auth_ssid, params->ssid, params->ssid_len);
                drv->auth_ssid_len = params->ssid_len;
        } else
                drv->auth_ssid_len = 0;


        os_free(drv->auth_ie);
        drv->auth_ie = NULL;
        drv->auth_ie_len = 0;
        if (params->ie) {
                drv->auth_ie = os_malloc(params->ie_len);
                if (drv->auth_ie) {
                        os_memcpy(drv->auth_ie, params->ie, params->ie_len);
                        drv->auth_ie_len = params->ie_len;
                }
        }

        for (i = 0; i < 4; i++) {
                if (params->wep_key[i] && params->wep_key_len[i] &&
                    params->wep_key_len[i] <= 16) {
                        os_memcpy(drv->auth_wep_key[i], params->wep_key[i],
                                  params->wep_key_len[i]);
                        drv->auth_wep_key_len[i] = params->wep_key_len[i];
                } else
                        drv->auth_wep_key_len[i] = 0;
        }
}


static void nl80211_unmask_11b_rates(struct i802_bss *bss)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;

        if (is_p2p_net_interface(drv->nlmode) || !drv->disabled_11b_rates)
                return;

        /*
         * Looks like we failed to unmask 11b rates previously. This could
         * happen, e.g., if the interface was down at the point in time when a
         * P2P group was terminated.
         */
        wpa_printf(MSG_DEBUG,
                   "nl80211: Interface %s mode is for non-P2P, but 11b rates were disabled - re-enable them",
                   bss->ifname);
        nl80211_disable_11b_rates(drv, drv->ifindex, 0);
}


static int wpa_driver_nl80211_authenticate(
        struct i802_bss *bss, struct wpa_driver_auth_params *params)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        int ret = -1, i;
        struct nl_msg *msg;
        enum nl80211_auth_type type;
        enum nl80211_iftype nlmode;
        int count = 0;
        int is_retry;

        nl80211_unmask_11b_rates(bss);

        is_retry = drv->retry_auth;
        drv->retry_auth = 0;
        drv->ignore_deauth_event = 0;

        nl80211_mark_disconnected(drv);
        os_memset(drv->auth_bssid, 0, ETH_ALEN);
        if (params->bssid)
                os_memcpy(drv->auth_attempt_bssid, params->bssid, ETH_ALEN);
        else
                os_memset(drv->auth_attempt_bssid, 0, ETH_ALEN);
        /* FIX: IBSS mode */
        nlmode = params->p2p ?
                NL80211_IFTYPE_P2P_CLIENT : NL80211_IFTYPE_STATION;
        if (drv->nlmode != nlmode &&
            wpa_driver_nl80211_set_mode(bss, nlmode) < 0)
                return -1;

retry:
        wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
                   drv->ifindex);

        msg = nl80211_drv_msg(drv, 0, NL80211_CMD_AUTHENTICATE);
        if (!msg)
                goto fail;

        for (i = 0; i < 4; i++) {
                if (!params->wep_key[i])
                        continue;
                wpa_driver_nl80211_set_key(bss->ifname, bss, WPA_ALG_WEP,
                                           NULL, i,
                                           i == params->wep_tx_keyidx, NULL, 0,
                                           params->wep_key[i],
                                           params->wep_key_len[i]);
                if (params->wep_tx_keyidx != i)
                        continue;
                if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
                               params->wep_key[i], params->wep_key_len[i]))
                        goto fail;
        }

        if (params->bssid) {
                wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
                           MAC2STR(params->bssid));
                if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid))
                        goto fail;
        }
        if (params->freq) {
                wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
                if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq))
                        goto fail;
        }
        if (params->ssid) {
                wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
                                  params->ssid, params->ssid_len);
                if (nla_put(msg, NL80211_ATTR_SSID, params->ssid_len,
                            params->ssid))
                        goto fail;
        }
        wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
        if (params->ie &&
            nla_put(msg, NL80211_ATTR_IE, params->ie_len, params->ie))
                goto fail;
        if (params->sae_data) {
                wpa_hexdump(MSG_DEBUG, "  * SAE data", params->sae_data,
                            params->sae_data_len);
                if (nla_put(msg, NL80211_ATTR_SAE_DATA, params->sae_data_len,
                            params->sae_data))
                        goto fail;
        }
        if (params->auth_alg & WPA_AUTH_ALG_OPEN)
                type = NL80211_AUTHTYPE_OPEN_SYSTEM;
        else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
                type = NL80211_AUTHTYPE_SHARED_KEY;
        else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
                type = NL80211_AUTHTYPE_NETWORK_EAP;
        else if (params->auth_alg & WPA_AUTH_ALG_FT)
                type = NL80211_AUTHTYPE_FT;
        else if (params->auth_alg & WPA_AUTH_ALG_SAE)
                type = NL80211_AUTHTYPE_SAE;
        else
                goto fail;
        wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
        if (nla_put_u32(msg, NL80211_ATTR_AUTH_TYPE, type))
                goto fail;
        if (params->local_state_change) {
                wpa_printf(MSG_DEBUG, "  * Local state change only");
                if (nla_put_flag(msg, NL80211_ATTR_LOCAL_STATE_CHANGE))
                        goto fail;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        msg = NULL;
        if (ret) {
                wpa_dbg(drv->ctx, MSG_DEBUG,
                        "nl80211: MLME command failed (auth): ret=%d (%s)",
                        ret, strerror(-ret));
                count++;
                if (ret == -EALREADY && count == 1 && params->bssid &&
                    !params->local_state_change) {
                        /*
                         * mac80211 does not currently accept new
                         * authentication if we are already authenticated. As a
                         * workaround, force deauthentication and try again.
                         */
                        wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
                                   "after forced deauthentication");
                        drv->ignore_deauth_event = 1;
                        wpa_driver_nl80211_deauthenticate(
                                bss, params->bssid,
                                WLAN_REASON_PREV_AUTH_NOT_VALID);
                        nlmsg_free(msg);
                        goto retry;
                }

                if (ret == -ENOENT && params->freq && !is_retry) {
                        /*
                         * cfg80211 has likely expired the BSS entry even
                         * though it was previously available in our internal
                         * BSS table. To recover quickly, start a single
                         * channel scan on the specified channel.
                         */
                        struct wpa_driver_scan_params scan;
                        int freqs[2];

                        os_memset(&scan, 0, sizeof(scan));
                        scan.num_ssids = 1;
                        if (params->ssid) {
                                scan.ssids[0].ssid = params->ssid;
                                scan.ssids[0].ssid_len = params->ssid_len;
                        }
                        freqs[0] = params->freq;
                        freqs[1] = 0;
                        scan.freqs = freqs;
                        wpa_printf(MSG_DEBUG, "nl80211: Trigger single "
                                   "channel scan to refresh cfg80211 BSS "
                                   "entry");
                        ret = wpa_driver_nl80211_scan(bss, &scan);
                        if (ret == 0) {
                                nl80211_copy_auth_params(drv, params);
                                drv->scan_for_auth = 1;
                        }
                } else if (is_retry) {
                        /*
                         * Need to indicate this with an event since the return
                         * value from the retry is not delivered to core code.
                         */
                        union wpa_event_data event;
                        wpa_printf(MSG_DEBUG, "nl80211: Authentication retry "
                                   "failed");
                        os_memset(&event, 0, sizeof(event));
                        os_memcpy(event.timeout_event.addr, drv->auth_bssid_,
                                  ETH_ALEN);
                        wpa_supplicant_event(drv->ctx, EVENT_AUTH_TIMED_OUT,
                                             &event);
                }
        } else {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Authentication request send successfully");
        }

fail:
        nlmsg_free(msg);
        return ret;
}


int wpa_driver_nl80211_authenticate_retry(struct wpa_driver_nl80211_data *drv)
{
        struct wpa_driver_auth_params params;
        struct i802_bss *bss = drv->first_bss;
        int i;

        wpa_printf(MSG_DEBUG, "nl80211: Try to authenticate again");

        os_memset(&params, 0, sizeof(params));
        params.freq = drv->auth_freq;
        params.auth_alg = drv->auth_alg;
        params.wep_tx_keyidx = drv->auth_wep_tx_keyidx;
        params.local_state_change = drv->auth_local_state_change;
        params.p2p = drv->auth_p2p;

        if (!is_zero_ether_addr(drv->auth_bssid_))
                params.bssid = drv->auth_bssid_;

        if (drv->auth_ssid_len) {
                params.ssid = drv->auth_ssid;
                params.ssid_len = drv->auth_ssid_len;
        }

        params.ie = drv->auth_ie;
        params.ie_len = drv->auth_ie_len;

        for (i = 0; i < 4; i++) {
                if (drv->auth_wep_key_len[i]) {
                        params.wep_key[i] = drv->auth_wep_key[i];
                        params.wep_key_len[i] = drv->auth_wep_key_len[i];
                }
        }

        drv->retry_auth = 1;
        return wpa_driver_nl80211_authenticate(bss, &params);
}


static int wpa_driver_nl80211_send_frame(struct i802_bss *bss,
                                         const void *data, size_t len,
                                         int encrypt, int noack,
                                         unsigned int freq, int no_cck,
                                         int offchanok, unsigned int wait_time,
                                         const u16 *csa_offs,
                                         size_t csa_offs_len)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        u64 cookie;
        int res;

        if (freq == 0 && drv->nlmode == NL80211_IFTYPE_ADHOC) {
                freq = nl80211_get_assoc_freq(drv);
                wpa_printf(MSG_DEBUG,
                           "nl80211: send_frame - Use assoc_freq=%u for IBSS",
                           freq);
        }
        if (freq == 0) {
                wpa_printf(MSG_DEBUG, "nl80211: send_frame - Use bss->freq=%u",
                           bss->freq);
                freq = bss->freq;
        }

        if (drv->use_monitor) {
                wpa_printf(MSG_DEBUG, "nl80211: send_frame(freq=%u bss->freq=%u) -> send_monitor",
                           freq, bss->freq);
                return nl80211_send_monitor(drv, data, len, encrypt, noack);
        }

        wpa_printf(MSG_DEBUG, "nl80211: send_frame -> send_frame_cmd");
        res = nl80211_send_frame_cmd(bss, freq, wait_time, data, len,
                                     &cookie, no_cck, noack, offchanok,
                                     csa_offs, csa_offs_len);
        if (res == 0 && !noack) {
                const struct ieee80211_mgmt *mgmt;
                u16 fc;

                mgmt = (const struct ieee80211_mgmt *) data;
                fc = le_to_host16(mgmt->frame_control);
                if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
                    WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_ACTION) {
                        wpa_printf(MSG_MSGDUMP,
                                   "nl80211: Update send_action_cookie from 0x%llx to 0x%llx",
                                   (long long unsigned int)
                                   drv->send_action_cookie,
                                   (long long unsigned int) cookie);
                        drv->send_action_cookie = cookie;
                }
        }

        return res;
}


static int wpa_driver_nl80211_send_mlme(struct i802_bss *bss, const u8 *data,
                                        size_t data_len, int noack,
                                        unsigned int freq, int no_cck,
                                        int offchanok,
                                        unsigned int wait_time,
                                        const u16 *csa_offs,
                                        size_t csa_offs_len)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct ieee80211_mgmt *mgmt;
        int encrypt = 1;
        u16 fc;

        mgmt = (struct ieee80211_mgmt *) data;
        fc = le_to_host16(mgmt->frame_control);
        wpa_printf(MSG_DEBUG, "nl80211: send_mlme - da= " MACSTR
                   " noack=%d freq=%u no_cck=%d offchanok=%d wait_time=%u fc=0x%x (%s) nlmode=%d",
                   MAC2STR(mgmt->da), noack, freq, no_cck, offchanok, wait_time,
                   fc, fc2str(fc), drv->nlmode);

        if ((is_sta_interface(drv->nlmode) ||
             drv->nlmode == NL80211_IFTYPE_P2P_DEVICE) &&
            WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
            WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_PROBE_RESP) {
                /*
                 * The use of last_mgmt_freq is a bit of a hack,
                 * but it works due to the single-threaded nature
                 * of wpa_supplicant.
                 */
                if (freq == 0) {
                        wpa_printf(MSG_DEBUG, "nl80211: Use last_mgmt_freq=%d",
                                   drv->last_mgmt_freq);
                        freq = drv->last_mgmt_freq;
                }
                return nl80211_send_frame_cmd(bss, freq, 0,
                                              data, data_len, NULL, 1, noack,
                                              1, csa_offs, csa_offs_len);
        }

        if (drv->device_ap_sme && is_ap_interface(drv->nlmode)) {
                if (freq == 0) {
                        wpa_printf(MSG_DEBUG, "nl80211: Use bss->freq=%d",
                                   bss->freq);
                        freq = bss->freq;
                }
                return nl80211_send_frame_cmd(bss, freq,
                                              (int) freq == bss->freq ? 0 :
                                              wait_time,
                                              data, data_len,
                                              &drv->send_action_cookie,
                                              no_cck, noack, offchanok,
                                              csa_offs, csa_offs_len);
        }

        if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
            WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
                /*
                 * Only one of the authentication frame types is encrypted.
                 * In order for static WEP encryption to work properly (i.e.,
                 * to not encrypt the frame), we need to tell mac80211 about
                 * the frames that must not be encrypted.
                 */
                u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
                u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
                if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
                        encrypt = 0;
        }

        wpa_printf(MSG_DEBUG, "nl80211: send_mlme -> send_frame");
        return wpa_driver_nl80211_send_frame(bss, data, data_len, encrypt,
                                             noack, freq, no_cck, offchanok,
                                             wait_time, csa_offs,
                                             csa_offs_len);
}


static int nl80211_put_basic_rates(struct nl_msg *msg, const int *basic_rates)
{
        u8 rates[NL80211_MAX_SUPP_RATES];
        u8 rates_len = 0;
        int i;

        if (!basic_rates)
                return 0;

        for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
                rates[rates_len++] = basic_rates[i] / 5;

        return nla_put(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
}


static int nl80211_set_bss(struct i802_bss *bss, int cts, int preamble,
                           int slot, int ht_opmode, int ap_isolate,
                           const int *basic_rates)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;

        if (!(msg = nl80211_bss_msg(bss, 0, NL80211_CMD_SET_BSS)) ||
            (cts >= 0 &&
             nla_put_u8(msg, NL80211_ATTR_BSS_CTS_PROT, cts)) ||
            (preamble >= 0 &&
             nla_put_u8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble)) ||
            (slot >= 0 &&
             nla_put_u8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot)) ||
            (ht_opmode >= 0 &&
             nla_put_u16(msg, NL80211_ATTR_BSS_HT_OPMODE, ht_opmode)) ||
            (ap_isolate >= 0 &&
             nla_put_u8(msg, NL80211_ATTR_AP_ISOLATE, ap_isolate)) ||
            nl80211_put_basic_rates(msg, basic_rates)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        return send_and_recv_msgs(drv, msg, NULL, NULL);
}


static int wpa_driver_nl80211_set_acl(void *priv,
                                      struct hostapd_acl_params *params)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        struct nl_msg *acl;
        unsigned int i;
        int ret;

        if (!(drv->capa.max_acl_mac_addrs))
                return -ENOTSUP;

        if (params->num_mac_acl > drv->capa.max_acl_mac_addrs)
                return -ENOTSUP;

        wpa_printf(MSG_DEBUG, "nl80211: Set %s ACL (num_mac_acl=%u)",
                   params->acl_policy ? "Accept" : "Deny", params->num_mac_acl);

        acl = nlmsg_alloc();
        if (!acl)
                return -ENOMEM;
        for (i = 0; i < params->num_mac_acl; i++) {
                if (nla_put(acl, i + 1, ETH_ALEN, params->mac_acl[i].addr)) {
                        nlmsg_free(acl);
                        return -ENOMEM;
                }
        }

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_SET_MAC_ACL)) ||
            nla_put_u32(msg, NL80211_ATTR_ACL_POLICY, params->acl_policy ?
                        NL80211_ACL_POLICY_DENY_UNLESS_LISTED :
                        NL80211_ACL_POLICY_ACCEPT_UNLESS_LISTED) ||
            nla_put_nested(msg, NL80211_ATTR_MAC_ADDRS, acl)) {
                nlmsg_free(msg);
                nlmsg_free(acl);
                return -ENOMEM;
        }
        nlmsg_free(acl);

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: Failed to set MAC ACL: %d (%s)",
                           ret, strerror(-ret));
        }

        return ret;
}


static int nl80211_put_beacon_int(struct nl_msg *msg, int beacon_int)
{
        if (beacon_int > 0) {
                wpa_printf(MSG_DEBUG, "  * beacon_int=%d", beacon_int);
                return nla_put_u32(msg, NL80211_ATTR_BEACON_INTERVAL,
                                   beacon_int);
        }

        return 0;
}


static int wpa_driver_nl80211_set_ap(void *priv,
                                     struct wpa_driver_ap_params *params)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        u8 cmd = NL80211_CMD_NEW_BEACON;
        int ret;
        int beacon_set;
        int num_suites;
        int smps_mode;
        u32 suites[10], suite;
        u32 ver;

        beacon_set = params->reenable ? 0 : bss->beacon_set;

        wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
                   beacon_set);
        if (beacon_set)
                cmd = NL80211_CMD_SET_BEACON;

        wpa_hexdump(MSG_DEBUG, "nl80211: Beacon head",
                    params->head, params->head_len);
        wpa_hexdump(MSG_DEBUG, "nl80211: Beacon tail",
                    params->tail, params->tail_len);
        wpa_printf(MSG_DEBUG, "nl80211: ifindex=%d", bss->ifindex);
        wpa_printf(MSG_DEBUG, "nl80211: beacon_int=%d", params->beacon_int);
        wpa_printf(MSG_DEBUG, "nl80211: dtim_period=%d", params->dtim_period);
        wpa_hexdump_ascii(MSG_DEBUG, "nl80211: ssid",
                          params->ssid, params->ssid_len);
        if (!(msg = nl80211_bss_msg(bss, 0, cmd)) ||
            nla_put(msg, NL80211_ATTR_BEACON_HEAD, params->head_len,
                    params->head) ||
            nla_put(msg, NL80211_ATTR_BEACON_TAIL, params->tail_len,
                    params->tail) ||
            nl80211_put_beacon_int(msg, params->beacon_int) ||
            nla_put_u32(msg, NL80211_ATTR_DTIM_PERIOD, params->dtim_period) ||
            nla_put(msg, NL80211_ATTR_SSID, params->ssid_len, params->ssid))
                goto fail;
        if (params->proberesp && params->proberesp_len) {
                wpa_hexdump(MSG_DEBUG, "nl80211: proberesp (offload)",
                            params->proberesp, params->proberesp_len);
                if (nla_put(msg, NL80211_ATTR_PROBE_RESP, params->proberesp_len,
                            params->proberesp))
                        goto fail;
        }
        switch (params->hide_ssid) {
        case NO_SSID_HIDING:
                wpa_printf(MSG_DEBUG, "nl80211: hidden SSID not in use");
                if (nla_put_u32(msg, NL80211_ATTR_HIDDEN_SSID,
                                NL80211_HIDDEN_SSID_NOT_IN_USE))
                        goto fail;
                break;
        case HIDDEN_SSID_ZERO_LEN:
                wpa_printf(MSG_DEBUG, "nl80211: hidden SSID zero len");
                if (nla_put_u32(msg, NL80211_ATTR_HIDDEN_SSID,
                                NL80211_HIDDEN_SSID_ZERO_LEN))
                        goto fail;
                break;
        case HIDDEN_SSID_ZERO_CONTENTS:
                wpa_printf(MSG_DEBUG, "nl80211: hidden SSID zero contents");
                if (nla_put_u32(msg, NL80211_ATTR_HIDDEN_SSID,
                                NL80211_HIDDEN_SSID_ZERO_CONTENTS))
                        goto fail;
                break;
        }
        wpa_printf(MSG_DEBUG, "nl80211: privacy=%d", params->privacy);
        if (params->privacy &&
            nla_put_flag(msg, NL80211_ATTR_PRIVACY))
                goto fail;
        wpa_printf(MSG_DEBUG, "nl80211: auth_algs=0x%x", params->auth_algs);
        if ((params->auth_algs & (WPA_AUTH_ALG_OPEN | WPA_AUTH_ALG_SHARED)) ==
            (WPA_AUTH_ALG_OPEN | WPA_AUTH_ALG_SHARED)) {
                /* Leave out the attribute */
        } else if (params->auth_algs & WPA_AUTH_ALG_SHARED) {
                if (nla_put_u32(msg, NL80211_ATTR_AUTH_TYPE,
                                NL80211_AUTHTYPE_SHARED_KEY))
                        goto fail;
        } else {
                if (nla_put_u32(msg, NL80211_ATTR_AUTH_TYPE,
                                NL80211_AUTHTYPE_OPEN_SYSTEM))
                        goto fail;
        }

        wpa_printf(MSG_DEBUG, "nl80211: wpa_version=0x%x", params->wpa_version);
        ver = 0;
        if (params->wpa_version & WPA_PROTO_WPA)
                ver |= NL80211_WPA_VERSION_1;
        if (params->wpa_version & WPA_PROTO_RSN)
                ver |= NL80211_WPA_VERSION_2;
        if (ver &&
            nla_put_u32(msg, NL80211_ATTR_WPA_VERSIONS, ver))
                goto fail;

        wpa_printf(MSG_DEBUG, "nl80211: key_mgmt_suites=0x%x",
                   params->key_mgmt_suites);
        num_suites = 0;
        if (params->key_mgmt_suites & WPA_KEY_MGMT_IEEE8021X)
                suites[num_suites++] = WLAN_AKM_SUITE_8021X;
        if (params->key_mgmt_suites & WPA_KEY_MGMT_PSK)
                suites[num_suites++] = WLAN_AKM_SUITE_PSK;
        if (num_suites &&
            nla_put(msg, NL80211_ATTR_AKM_SUITES, num_suites * sizeof(u32),
                    suites))
                goto fail;

        if (params->key_mgmt_suites & WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
            params->pairwise_ciphers & (WPA_CIPHER_WEP104 | WPA_CIPHER_WEP40) &&
            nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT))
                goto fail;

        wpa_printf(MSG_DEBUG, "nl80211: pairwise_ciphers=0x%x",
                   params->pairwise_ciphers);
        num_suites = wpa_cipher_to_cipher_suites(params->pairwise_ciphers,
                                                 suites, ARRAY_SIZE(suites));
        if (num_suites &&
            nla_put(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE,
                    num_suites * sizeof(u32), suites))
                goto fail;

        wpa_printf(MSG_DEBUG, "nl80211: group_cipher=0x%x",
                   params->group_cipher);
        suite = wpa_cipher_to_cipher_suite(params->group_cipher);
        if (suite &&
            nla_put_u32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, suite))
                goto fail;

        if (params->ht_opmode != -1) {
                switch (params->smps_mode) {
                case HT_CAP_INFO_SMPS_DYNAMIC:
                        wpa_printf(MSG_DEBUG, "nl80211: SMPS mode - dynamic");
                        smps_mode = NL80211_SMPS_DYNAMIC;
                        break;
                case HT_CAP_INFO_SMPS_STATIC:
                        wpa_printf(MSG_DEBUG, "nl80211: SMPS mode - static");
                        smps_mode = NL80211_SMPS_STATIC;
                        break;
                default:
                        /* invalid - fallback to smps off */
                case HT_CAP_INFO_SMPS_DISABLED:
                        wpa_printf(MSG_DEBUG, "nl80211: SMPS mode - off");
                        smps_mode = NL80211_SMPS_OFF;
                        break;
                }
                if (nla_put_u32(msg, NL80211_ATTR_SMPS_MODE, smps_mode))
                        goto fail;
        }

        if (params->beacon_ies) {
                wpa_hexdump_buf(MSG_DEBUG, "nl80211: beacon_ies",
                                params->beacon_ies);
                if (nla_put(msg, NL80211_ATTR_IE,
                            wpabuf_len(params->beacon_ies),
                            wpabuf_head(params->beacon_ies)))
                        goto fail;
        }
        if (params->proberesp_ies) {
                wpa_hexdump_buf(MSG_DEBUG, "nl80211: proberesp_ies",
                                params->proberesp_ies);
                if (nla_put(msg, NL80211_ATTR_IE_PROBE_RESP,
                            wpabuf_len(params->proberesp_ies),
                            wpabuf_head(params->proberesp_ies)))
                        goto fail;
        }
        if (params->assocresp_ies) {
                wpa_hexdump_buf(MSG_DEBUG, "nl80211: assocresp_ies",
                                params->assocresp_ies);
                if (nla_put(msg, NL80211_ATTR_IE_ASSOC_RESP,
                            wpabuf_len(params->assocresp_ies),
                            wpabuf_head(params->assocresp_ies)))
                        goto fail;
        }

        if (drv->capa.flags & WPA_DRIVER_FLAGS_INACTIVITY_TIMER)  {
                wpa_printf(MSG_DEBUG, "nl80211: ap_max_inactivity=%d",
                           params->ap_max_inactivity);
                if (nla_put_u16(msg, NL80211_ATTR_INACTIVITY_TIMEOUT,
                                params->ap_max_inactivity))
                        goto fail;
        }

#ifdef CONFIG_P2P
        if (params->p2p_go_ctwindow > 0) {
                if (drv->p2p_go_ctwindow_supported) {
                        wpa_printf(MSG_DEBUG, "nl80211: P2P GO ctwindow=%d",
                                   params->p2p_go_ctwindow);
                        if (nla_put_u8(msg, NL80211_ATTR_P2P_CTWINDOW,
                                       params->p2p_go_ctwindow))
                                goto fail;
                } else {
                        wpa_printf(MSG_INFO,
                                   "nl80211: Driver does not support CTWindow configuration - ignore this parameter");
                }
        }
#endif /* CONFIG_P2P */

        if (params->pbss) {
                wpa_printf(MSG_DEBUG, "nl80211: PBSS");
                if (nla_put_flag(msg, NL80211_ATTR_PBSS))
                        goto fail;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
                           ret, strerror(-ret));
        } else {
                bss->beacon_set = 1;
                nl80211_set_bss(bss, params->cts_protect, params->preamble,
                                params->short_slot_time, params->ht_opmode,
                                params->isolate, params->basic_rates);
                if (beacon_set && params->freq &&
                    params->freq->bandwidth != bss->bandwidth) {
                        wpa_printf(MSG_DEBUG,
                                   "nl80211: Update BSS %s bandwidth: %d -> %d",
                                   bss->ifname, bss->bandwidth,
                                   params->freq->bandwidth);
                        ret = nl80211_set_channel(bss, params->freq, 1);
                        if (ret) {
                                wpa_printf(MSG_DEBUG,
                                           "nl80211: Frequency set failed: %d (%s)",
                                           ret, strerror(-ret));
                        } else {
                                wpa_printf(MSG_DEBUG,
                                           "nl80211: Frequency set succeeded for ht2040 coex");
                                bss->bandwidth = params->freq->bandwidth;
                        }
                } else if (!beacon_set) {
                        /*
                         * cfg80211 updates the driver on frequence change in AP
                         * mode only at the point when beaconing is started, so
                         * set the initial value here.
                         */
                        bss->bandwidth = params->freq->bandwidth;
                }
        }
        return ret;
fail:
        nlmsg_free(msg);
        return -ENOBUFS;
}


static int nl80211_put_freq_params(struct nl_msg *msg,
                                   const struct hostapd_freq_params *freq)
{
        wpa_printf(MSG_DEBUG, "  * freq=%d", freq->freq);
        if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq))
                return -ENOBUFS;

        wpa_printf(MSG_DEBUG, "  * vht_enabled=%d", freq->vht_enabled);
        wpa_printf(MSG_DEBUG, "  * ht_enabled=%d", freq->ht_enabled);

        if (freq->vht_enabled) {
                enum nl80211_chan_width cw;

                wpa_printf(MSG_DEBUG, "  * bandwidth=%d", freq->bandwidth);
                switch (freq->bandwidth) {
                case 20:
                        cw = NL80211_CHAN_WIDTH_20;
                        break;
                case 40:
                        cw = NL80211_CHAN_WIDTH_40;
                        break;
                case 80:
                        if (freq->center_freq2)
                                cw = NL80211_CHAN_WIDTH_80P80;
                        else
                                cw = NL80211_CHAN_WIDTH_80;
                        break;
                case 160:
                        cw = NL80211_CHAN_WIDTH_160;
                        break;
                default:
                        return -EINVAL;
                }

                wpa_printf(MSG_DEBUG, "  * channel_width=%d", cw);
                wpa_printf(MSG_DEBUG, "  * center_freq1=%d",
                           freq->center_freq1);
                wpa_printf(MSG_DEBUG, "  * center_freq2=%d",
                           freq->center_freq2);
                if (nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, cw) ||
                    nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ1,
                                freq->center_freq1) ||
                    (freq->center_freq2 &&
                     nla_put_u32(msg, NL80211_ATTR_CENTER_FREQ2,
                                 freq->center_freq2)))
                        return -ENOBUFS;
        } else if (freq->ht_enabled) {
                enum nl80211_channel_type ct;

                wpa_printf(MSG_DEBUG, "  * sec_channel_offset=%d",
                           freq->sec_channel_offset);
                switch (freq->sec_channel_offset) {
                case -1:
                        ct = NL80211_CHAN_HT40MINUS;
                        break;
                case 1:
                        ct = NL80211_CHAN_HT40PLUS;
                        break;
                default:
                        ct = NL80211_CHAN_HT20;
                        break;
                }

                wpa_printf(MSG_DEBUG, "  * channel_type=%d", ct);
                if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, ct))
                        return -ENOBUFS;
        }
        return 0;
}


static int nl80211_set_channel(struct i802_bss *bss,
                               struct hostapd_freq_params *freq, int set_chan)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;

        wpa_printf(MSG_DEBUG,
                   "nl80211: Set freq %d (ht_enabled=%d, vht_enabled=%d, bandwidth=%d MHz, cf1=%d MHz, cf2=%d MHz)",
                   freq->freq, freq->ht_enabled, freq->vht_enabled,
                   freq->bandwidth, freq->center_freq1, freq->center_freq2);

        msg = nl80211_drv_msg(drv, 0, set_chan ? NL80211_CMD_SET_CHANNEL :
                              NL80211_CMD_SET_WIPHY);
        if (!msg || nl80211_put_freq_params(msg, freq) < 0) {
                nlmsg_free(msg);
                return -1;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret == 0) {
                bss->freq = freq->freq;
                return 0;
        }
        wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
                   "%d (%s)", freq->freq, ret, strerror(-ret));
        return -1;
}


static u32 sta_flags_nl80211(int flags)
{
        u32 f = 0;

        if (flags & WPA_STA_AUTHORIZED)
                f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
        if (flags & WPA_STA_WMM)
                f |= BIT(NL80211_STA_FLAG_WME);
        if (flags & WPA_STA_SHORT_PREAMBLE)
                f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
        if (flags & WPA_STA_MFP)
                f |= BIT(NL80211_STA_FLAG_MFP);
        if (flags & WPA_STA_TDLS_PEER)
                f |= BIT(NL80211_STA_FLAG_TDLS_PEER);
        if (flags & WPA_STA_AUTHENTICATED)
                f |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
        if (flags & WPA_STA_ASSOCIATED)
                f |= BIT(NL80211_STA_FLAG_ASSOCIATED);

        return f;
}


#ifdef CONFIG_MESH
static u32 sta_plink_state_nl80211(enum mesh_plink_state state)
{
        switch (state) {
        case PLINK_LISTEN:
                return NL80211_PLINK_LISTEN;
        case PLINK_OPEN_SENT:
                return NL80211_PLINK_OPN_SNT;
        case PLINK_OPEN_RCVD:
                return NL80211_PLINK_OPN_RCVD;
        case PLINK_CNF_RCVD:
                return NL80211_PLINK_CNF_RCVD;
        case PLINK_ESTAB:
                return NL80211_PLINK_ESTAB;
        case PLINK_HOLDING:
                return NL80211_PLINK_HOLDING;
        case PLINK_BLOCKED:
                return NL80211_PLINK_BLOCKED;
        default:
                wpa_printf(MSG_ERROR, "nl80211: Invalid mesh plink state %d",
                           state);
        }
        return -1;
}
#endif /* CONFIG_MESH */


static int wpa_driver_nl80211_sta_add(void *priv,
                                      struct hostapd_sta_add_params *params)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        struct nl80211_sta_flag_update upd;
        int ret = -ENOBUFS;

        if ((params->flags & WPA_STA_TDLS_PEER) &&
            !(drv->capa.flags & WPA_DRIVER_FLAGS_TDLS_SUPPORT))
                return -EOPNOTSUPP;

        wpa_printf(MSG_DEBUG, "nl80211: %s STA " MACSTR,
                   params->set ? "Set" : "Add", MAC2STR(params->addr));
        msg = nl80211_bss_msg(bss, 0, params->set ? NL80211_CMD_SET_STATION :
                              NL80211_CMD_NEW_STATION);
        if (!msg || nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr))
                goto fail;

        /*
         * Set the below properties only in one of the following cases:
         * 1. New station is added, already associated.
         * 2. Set WPA_STA_TDLS_PEER station.
         * 3. Set an already added unassociated station, if driver supports
         * full AP client state. (Set these properties after station became
         * associated will be rejected by the driver).
         */
        if (!params->set || (params->flags & WPA_STA_TDLS_PEER) ||
            (params->set && FULL_AP_CLIENT_STATE_SUPP(drv->capa.flags) &&
             (params->flags & WPA_STA_ASSOCIATED))) {
                wpa_hexdump(MSG_DEBUG, "  * supported rates",
                            params->supp_rates, params->supp_rates_len);
                wpa_printf(MSG_DEBUG, "  * capability=0x%x",
                           params->capability);
                if (nla_put(msg, NL80211_ATTR_STA_SUPPORTED_RATES,
                            params->supp_rates_len, params->supp_rates) ||
                    nla_put_u16(msg, NL80211_ATTR_STA_CAPABILITY,
                                params->capability))
                        goto fail;

                if (params->ht_capabilities) {
                        wpa_hexdump(MSG_DEBUG, "  * ht_capabilities",
                                    (u8 *) params->ht_capabilities,
                                    sizeof(*params->ht_capabilities));
                        if (nla_put(msg, NL80211_ATTR_HT_CAPABILITY,
                                    sizeof(*params->ht_capabilities),
                                    params->ht_capabilities))
                                goto fail;
                }

                if (params->vht_capabilities) {
                        wpa_hexdump(MSG_DEBUG, "  * vht_capabilities",
                                    (u8 *) params->vht_capabilities,
                                    sizeof(*params->vht_capabilities));
                        if (nla_put(msg, NL80211_ATTR_VHT_CAPABILITY,
                                    sizeof(*params->vht_capabilities),
                                    params->vht_capabilities))
                                goto fail;
                }

                if (params->ext_capab) {
                        wpa_hexdump(MSG_DEBUG, "  * ext_capab",
                                    params->ext_capab, params->ext_capab_len);
                        if (nla_put(msg, NL80211_ATTR_STA_EXT_CAPABILITY,
                                    params->ext_capab_len, params->ext_capab))
                                goto fail;
                }
        }
        if (!params->set) {
                if (params->aid) {
                        wpa_printf(MSG_DEBUG, "  * aid=%u", params->aid);
                        if (nla_put_u16(msg, NL80211_ATTR_STA_AID, params->aid))
                                goto fail;
                } else {
                        /*
                         * cfg80211 validates that AID is non-zero, so we have
                         * to make this a non-zero value for the TDLS case where
                         * a dummy STA entry is used for now and for a station
                         * that is still not associated.
                         */
                        wpa_printf(MSG_DEBUG, "  * aid=1 (%s workaround)",
                                   (params->flags & WPA_STA_TDLS_PEER) ?
                                   "TDLS" : "UNASSOC_STA");
                        if (nla_put_u16(msg, NL80211_ATTR_STA_AID, 1))
                                goto fail;
                }
                wpa_printf(MSG_DEBUG, "  * listen_interval=%u",
                           params->listen_interval);
                if (nla_put_u16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
                                params->listen_interval))
                        goto fail;
        } else if (params->aid && (params->flags & WPA_STA_TDLS_PEER)) {
                wpa_printf(MSG_DEBUG, "  * peer_aid=%u", params->aid);
                if (nla_put_u16(msg, NL80211_ATTR_PEER_AID, params->aid))
                        goto fail;
        } else if (FULL_AP_CLIENT_STATE_SUPP(drv->capa.flags) &&
                   (params->flags & WPA_STA_ASSOCIATED)) {
                wpa_printf(MSG_DEBUG, "  * aid=%u", params->aid);
                wpa_printf(MSG_DEBUG, "  * listen_interval=%u",
                           params->listen_interval);
                if (nla_put_u16(msg, NL80211_ATTR_STA_AID, params->aid) ||
                    nla_put_u16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
                                params->listen_interval))
                        goto fail;
        }

        if (params->vht_opmode_enabled) {
                wpa_printf(MSG_DEBUG, "  * opmode=%u", params->vht_opmode);
                if (nla_put_u8(msg, NL80211_ATTR_OPMODE_NOTIF,
                               params->vht_opmode))
                        goto fail;
        }

        if (params->supp_channels) {
                wpa_hexdump(MSG_DEBUG, "  * supported channels",
                            params->supp_channels, params->supp_channels_len);
                if (nla_put(msg, NL80211_ATTR_STA_SUPPORTED_CHANNELS,
                            params->supp_channels_len, params->supp_channels))
                        goto fail;
        }

        if (params->supp_oper_classes) {
                wpa_hexdump(MSG_DEBUG, "  * supported operating classes",
                            params->supp_oper_classes,
                            params->supp_oper_classes_len);
                if (nla_put(msg, NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES,
                            params->supp_oper_classes_len,
                            params->supp_oper_classes))
                        goto fail;
        }

        os_memset(&upd, 0, sizeof(upd));
        upd.set = sta_flags_nl80211(params->flags);
        upd.mask = upd.set | sta_flags_nl80211(params->flags_mask);

        /*
         * If the driver doesn't support full AP client state, ignore ASSOC/AUTH
         * flags, as nl80211 driver moves a new station, by default, into
         * associated state.
         *
         * On the other hand, if the driver supports that feature and the
         * station is added in unauthenticated state, set the
         * authenticated/associated bits in the mask to prevent moving this
         * station to associated state before it is actually associated.
         *
         * This is irrelevant for mesh mode where the station is added to the
         * driver as authenticated already, and ASSOCIATED isn't part of the
         * nl80211 API.
         */
        if (!is_mesh_interface(drv->nlmode)) {
                if (!FULL_AP_CLIENT_STATE_SUPP(drv->capa.flags)) {
                        wpa_printf(MSG_DEBUG,
                                   "nl80211: Ignore ASSOC/AUTH flags since driver doesn't support full AP client state");
                        upd.mask &= ~(BIT(NL80211_STA_FLAG_ASSOCIATED) |
                                      BIT(NL80211_STA_FLAG_AUTHENTICATED));
                } else if (!params->set &&
                           !(params->flags & WPA_STA_TDLS_PEER)) {
                        if (!(params->flags & WPA_STA_AUTHENTICATED))
                                upd.mask |= BIT(NL80211_STA_FLAG_AUTHENTICATED);
                        if (!(params->flags & WPA_STA_ASSOCIATED))
                                upd.mask |= BIT(NL80211_STA_FLAG_ASSOCIATED);
                }
        }

        wpa_printf(MSG_DEBUG, "  * flags set=0x%x mask=0x%x",
                   upd.set, upd.mask);
        if (nla_put(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd))
                goto fail;

#ifdef CONFIG_MESH
        if (params->plink_state &&
            nla_put_u8(msg, NL80211_ATTR_STA_PLINK_STATE,
                       sta_plink_state_nl80211(params->plink_state)))
                goto fail;
#endif /* CONFIG_MESH */

        if (params->flags & WPA_STA_WMM) {
                struct nlattr *wme = nla_nest_start(msg, NL80211_ATTR_STA_WME);

                wpa_printf(MSG_DEBUG, "  * qosinfo=0x%x", params->qosinfo);
                if (!wme ||
                    nla_put_u8(msg, NL80211_STA_WME_UAPSD_QUEUES,
                               params->qosinfo & WMM_QOSINFO_STA_AC_MASK) ||
                    nla_put_u8(msg, NL80211_STA_WME_MAX_SP,
                               (params->qosinfo >> WMM_QOSINFO_STA_SP_SHIFT) &
                               WMM_QOSINFO_STA_SP_MASK))
                        goto fail;
                nla_nest_end(msg, wme);
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        msg = NULL;
        if (ret)
                wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_%s_STATION "
                           "result: %d (%s)", params->set ? "SET" : "NEW", ret,
                           strerror(-ret));
        if (ret == -EEXIST)
                ret = 0;
fail:
        nlmsg_free(msg);
        return ret;
}


static void rtnl_neigh_delete_fdb_entry(struct i802_bss *bss, const u8 *addr)
{
#ifdef CONFIG_LIBNL3_ROUTE
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct rtnl_neigh *rn;
        struct nl_addr *nl_addr;
        int err;

        rn = rtnl_neigh_alloc();
        if (!rn)
                return;

        rtnl_neigh_set_family(rn, AF_BRIDGE);
        rtnl_neigh_set_ifindex(rn, bss->ifindex);
        nl_addr = nl_addr_build(AF_BRIDGE, (void *) addr, ETH_ALEN);
        if (!nl_addr) {
                rtnl_neigh_put(rn);
                return;
        }
        rtnl_neigh_set_lladdr(rn, nl_addr);

        err = rtnl_neigh_delete(drv->rtnl_sk, rn, 0);
        if (err < 0) {
                wpa_printf(MSG_DEBUG, "nl80211: bridge FDB entry delete for "
                           MACSTR " ifindex=%d failed: %s", MAC2STR(addr),
                           bss->ifindex, nl_geterror(err));
        } else {
                wpa_printf(MSG_DEBUG, "nl80211: deleted bridge FDB entry for "
                           MACSTR, MAC2STR(addr));
        }

        nl_addr_put(nl_addr);
        rtnl_neigh_put(rn);
#endif /* CONFIG_LIBNL3_ROUTE */
}


static int wpa_driver_nl80211_sta_remove(struct i802_bss *bss, const u8 *addr,
                                         int deauth, u16 reason_code)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;

        if (!(msg = nl80211_bss_msg(bss, 0, NL80211_CMD_DEL_STATION)) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
            (deauth == 0 &&
             nla_put_u8(msg, NL80211_ATTR_MGMT_SUBTYPE,
                        WLAN_FC_STYPE_DISASSOC)) ||
            (deauth == 1 &&
             nla_put_u8(msg, NL80211_ATTR_MGMT_SUBTYPE,
                        WLAN_FC_STYPE_DEAUTH)) ||
            (reason_code &&
             nla_put_u16(msg, NL80211_ATTR_REASON_CODE, reason_code))) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        wpa_printf(MSG_DEBUG, "nl80211: sta_remove -> DEL_STATION %s " MACSTR
                   " --> %d (%s)",
                   bss->ifname, MAC2STR(addr), ret, strerror(-ret));

        if (drv->rtnl_sk)
                rtnl_neigh_delete_fdb_entry(bss, addr);

        if (ret == -ENOENT)
                return 0;
        return ret;
}


void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv, int ifidx)
{
        struct nl_msg *msg;
        struct wpa_driver_nl80211_data *drv2;

        wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);

        /* stop listening for EAPOL on this interface */
        dl_list_for_each(drv2, &drv->global->interfaces,
                         struct wpa_driver_nl80211_data, list)
        {
                del_ifidx(drv2, ifidx, IFIDX_ANY);
                /* Remove all bridges learned for this iface */
                del_ifidx(drv2, IFIDX_ANY, ifidx);
        }

        msg = nl80211_ifindex_msg(drv, ifidx, 0, NL80211_CMD_DEL_INTERFACE);
        if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
                return;
        wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
}


static const char * nl80211_iftype_str(enum nl80211_iftype mode)
{
        switch (mode) {
        case NL80211_IFTYPE_ADHOC:
                return "ADHOC";
        case NL80211_IFTYPE_STATION:
                return "STATION";
        case NL80211_IFTYPE_AP:
                return "AP";
        case NL80211_IFTYPE_AP_VLAN:
                return "AP_VLAN";
        case NL80211_IFTYPE_WDS:
                return "WDS";
        case NL80211_IFTYPE_MONITOR:
                return "MONITOR";
        case NL80211_IFTYPE_MESH_POINT:
                return "MESH_POINT";
        case NL80211_IFTYPE_P2P_CLIENT:
                return "P2P_CLIENT";
        case NL80211_IFTYPE_P2P_GO:
                return "P2P_GO";
        case NL80211_IFTYPE_P2P_DEVICE:
                return "P2P_DEVICE";
        default:
                return "unknown";
        }
}


static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
                                     const char *ifname,
                                     enum nl80211_iftype iftype,
                                     const u8 *addr, int wds,
                                     int (*handler)(struct nl_msg *, void *),
                                     void *arg)
{
        struct nl_msg *msg;
        int ifidx;
        int ret = -ENOBUFS;

        wpa_printf(MSG_DEBUG, "nl80211: Create interface iftype %d (%s)",
                   iftype, nl80211_iftype_str(iftype));

        msg = nl80211_cmd_msg(drv->first_bss, 0, NL80211_CMD_NEW_INTERFACE);
        if (!msg ||
            nla_put_string(msg, NL80211_ATTR_IFNAME, ifname) ||
            nla_put_u32(msg, NL80211_ATTR_IFTYPE, iftype))
                goto fail;

        if (iftype == NL80211_IFTYPE_MONITOR) {
                struct nlattr *flags;

                flags = nla_nest_start(msg, NL80211_ATTR_MNTR_FLAGS);
                if (!flags ||
                    nla_put_flag(msg, NL80211_MNTR_FLAG_COOK_FRAMES))
                        goto fail;

                nla_nest_end(msg, flags);
        } else if (wds) {
                if (nla_put_u8(msg, NL80211_ATTR_4ADDR, wds))
                        goto fail;
        }

        /*
         * Tell cfg80211 that the interface belongs to the socket that created
         * it, and the interface should be deleted when the socket is closed.
         */
        if (nla_put_flag(msg, NL80211_ATTR_IFACE_SOCKET_OWNER))
                goto fail;

        ret = send_and_recv_msgs(drv, msg, handler, arg);
        msg = NULL;
        if (ret) {
        fail:
                nlmsg_free(msg);
                wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
                           ifname, ret, strerror(-ret));
                return ret;
        }

        if (iftype == NL80211_IFTYPE_P2P_DEVICE)
                return 0;

        ifidx = if_nametoindex(ifname);
        wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
                   ifname, ifidx);

        if (ifidx <= 0)
                return -1;

        /*
         * Some virtual interfaces need to process EAPOL packets and events on
         * the parent interface. This is used mainly with hostapd.
         */
        if (drv->hostapd ||
            iftype == NL80211_IFTYPE_AP_VLAN ||
            iftype == NL80211_IFTYPE_WDS ||
            iftype == NL80211_IFTYPE_MONITOR) {
                /* start listening for EAPOL on this interface */
                add_ifidx(drv, ifidx, IFIDX_ANY);
        }

        if (addr && iftype != NL80211_IFTYPE_MONITOR &&
            linux_set_ifhwaddr(drv->global->ioctl_sock, ifname, addr)) {
                nl80211_remove_iface(drv, ifidx);
                return -1;
        }

        return ifidx;
}


int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
                         const char *ifname, enum nl80211_iftype iftype,
                         const u8 *addr, int wds,
                         int (*handler)(struct nl_msg *, void *),
                         void *arg, int use_existing)
{
        int ret;

        ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds, handler,
                                        arg);

        /* if error occurred and interface exists already */
        if (ret == -ENFILE && if_nametoindex(ifname)) {
                if (use_existing) {
                        wpa_printf(MSG_DEBUG, "nl80211: Continue using existing interface %s",
                                   ifname);
                        if (addr && iftype != NL80211_IFTYPE_MONITOR &&
                            linux_set_ifhwaddr(drv->global->ioctl_sock, ifname,
                                               addr) < 0 &&
                            (linux_set_iface_flags(drv->global->ioctl_sock,
                                                   ifname, 0) < 0 ||
                             linux_set_ifhwaddr(drv->global->ioctl_sock, ifname,
                                                addr) < 0 ||
                             linux_set_iface_flags(drv->global->ioctl_sock,
                                                   ifname, 1) < 0))
                                        return -1;
                        return -ENFILE;
                }
                wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);

                /* Try to remove the interface that was already there. */
                nl80211_remove_iface(drv, if_nametoindex(ifname));

                /* Try to create the interface again */
                ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
                                                wds, handler, arg);
        }

        if (ret >= 0 && is_p2p_net_interface(iftype)) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Interface %s created for P2P - disable 11b rates",
                           ifname);
                nl80211_disable_11b_rates(drv, ret, 1);
        }

        return ret;
}


static int nl80211_setup_ap(struct i802_bss *bss)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;

        wpa_printf(MSG_DEBUG, "nl80211: Setup AP(%s) - device_ap_sme=%d use_monitor=%d",
                   bss->ifname, drv->device_ap_sme, drv->use_monitor);

        /*
         * Disable Probe Request reporting unless we need it in this way for
         * devices that include the AP SME, in the other case (unless using
         * monitor iface) we'll get it through the nl_mgmt socket instead.
         */
        if (!drv->device_ap_sme)
                wpa_driver_nl80211_probe_req_report(bss, 0);

        if (!drv->device_ap_sme && !drv->use_monitor)
                if (nl80211_mgmt_subscribe_ap(bss))
                        return -1;

        if (drv->device_ap_sme && !drv->use_monitor)
                if (nl80211_mgmt_subscribe_ap_dev_sme(bss))
                        return -1;

        if (!drv->device_ap_sme && drv->use_monitor &&
            nl80211_create_monitor_interface(drv) &&
            !drv->device_ap_sme)
                return -1;

        if (drv->device_ap_sme &&
            wpa_driver_nl80211_probe_req_report(bss, 1) < 0) {
                wpa_printf(MSG_DEBUG, "nl80211: Failed to enable "
                           "Probe Request frame reporting in AP mode");
                /* Try to survive without this */
        }

        return 0;
}


static void nl80211_teardown_ap(struct i802_bss *bss)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;

        wpa_printf(MSG_DEBUG, "nl80211: Teardown AP(%s) - device_ap_sme=%d use_monitor=%d",
                   bss->ifname, drv->device_ap_sme, drv->use_monitor);
        if (drv->device_ap_sme) {
                wpa_driver_nl80211_probe_req_report(bss, 0);
                if (!drv->use_monitor)
                        nl80211_mgmt_unsubscribe(bss, "AP teardown (dev SME)");
        } else if (drv->use_monitor)
                nl80211_remove_monitor_interface(drv);
        else
                nl80211_mgmt_unsubscribe(bss, "AP teardown");

        bss->beacon_set = 0;
}


static int nl80211_send_eapol_data(struct i802_bss *bss,
                                   const u8 *addr, const u8 *data,
                                   size_t data_len)
{
        struct sockaddr_ll ll;
        int ret;

        if (bss->drv->eapol_tx_sock < 0) {
                wpa_printf(MSG_DEBUG, "nl80211: No socket to send EAPOL");
                return -1;
        }

        os_memset(&ll, 0, sizeof(ll));
        ll.sll_family = AF_PACKET;
        ll.sll_ifindex = bss->ifindex;
        ll.sll_protocol = htons(ETH_P_PAE);
        ll.sll_halen = ETH_ALEN;
        os_memcpy(ll.sll_addr, addr, ETH_ALEN);
        ret = sendto(bss->drv->eapol_tx_sock, data, data_len, 0,
                     (struct sockaddr *) &ll, sizeof(ll));
        if (ret < 0)
                wpa_printf(MSG_ERROR, "nl80211: EAPOL TX: %s",
                           strerror(errno));

        return ret;
}


static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };

static int wpa_driver_nl80211_hapd_send_eapol(
        void *priv, const u8 *addr, const u8 *data,
        size_t data_len, int encrypt, const u8 *own_addr, u32 flags)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct ieee80211_hdr *hdr;
        size_t len;
        u8 *pos;
        int res;
        int qos = flags & WPA_STA_WMM;

        if (drv->device_ap_sme || !drv->use_monitor)
                return nl80211_send_eapol_data(bss, addr, data, data_len);

        len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
                data_len;
        hdr = os_zalloc(len);
        if (hdr == NULL) {
                wpa_printf(MSG_INFO, "nl80211: Failed to allocate EAPOL buffer(len=%lu)",
                           (unsigned long) len);
                return -1;
        }

        hdr->frame_control =
                IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
        hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
        if (encrypt)
                hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
        if (qos) {
                hdr->frame_control |=
                        host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
        }

        memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
        memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
        memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
        pos = (u8 *) (hdr + 1);

        if (qos) {
                /* Set highest priority in QoS header */
                pos[0] = 7;
                pos[1] = 0;
                pos += 2;
        }

        memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
        pos += sizeof(rfc1042_header);
        WPA_PUT_BE16(pos, ETH_P_PAE);
        pos += 2;
        memcpy(pos, data, data_len);

        res = wpa_driver_nl80211_send_frame(bss, (u8 *) hdr, len, encrypt, 0,
                                            0, 0, 0, 0, NULL, 0);
        if (res < 0) {
                wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
                           "failed: %d (%s)",
                           (unsigned long) len, errno, strerror(errno));
        }
        os_free(hdr);

        return res;
}


static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
                                            unsigned int total_flags,
                                            unsigned int flags_or,
                                            unsigned int flags_and)
{
        struct i802_bss *bss = priv;
        struct nl_msg *msg;
        struct nlattr *flags;
        struct nl80211_sta_flag_update upd;

        wpa_printf(MSG_DEBUG, "nl80211: Set STA flags - ifname=%s addr=" MACSTR
                   " total_flags=0x%x flags_or=0x%x flags_and=0x%x authorized=%d",
                   bss->ifname, MAC2STR(addr), total_flags, flags_or, flags_and,
                   !!(total_flags & WPA_STA_AUTHORIZED));

        if (!(msg = nl80211_bss_msg(bss, 0, NL80211_CMD_SET_STATION)) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr))
                goto fail;

        /*
         * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
         * can be removed eventually.
         */
        flags = nla_nest_start(msg, NL80211_ATTR_STA_FLAGS);
        if (!flags ||
            ((total_flags & WPA_STA_AUTHORIZED) &&
             nla_put_flag(msg, NL80211_STA_FLAG_AUTHORIZED)) ||
            ((total_flags & WPA_STA_WMM) &&
             nla_put_flag(msg, NL80211_STA_FLAG_WME)) ||
            ((total_flags & WPA_STA_SHORT_PREAMBLE) &&
             nla_put_flag(msg, NL80211_STA_FLAG_SHORT_PREAMBLE)) ||
            ((total_flags & WPA_STA_MFP) &&
             nla_put_flag(msg, NL80211_STA_FLAG_MFP)) ||
            ((total_flags & WPA_STA_TDLS_PEER) &&
             nla_put_flag(msg, NL80211_STA_FLAG_TDLS_PEER)))
                goto fail;

        nla_nest_end(msg, flags);

        os_memset(&upd, 0, sizeof(upd));
        upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
        upd.set = sta_flags_nl80211(flags_or);
        if (nla_put(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd))
                goto fail;

        return send_and_recv_msgs(bss->drv, msg, NULL, NULL);
fail:
        nlmsg_free(msg);
        return -ENOBUFS;
}


static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
                                 struct wpa_driver_associate_params *params)
{
        enum nl80211_iftype nlmode, old_mode;

        if (params->p2p) {
                wpa_printf(MSG_DEBUG, "nl80211: Setup AP operations for P2P "
                           "group (GO)");
                nlmode = NL80211_IFTYPE_P2P_GO;
        } else
                nlmode = NL80211_IFTYPE_AP;

        old_mode = drv->nlmode;
        if (wpa_driver_nl80211_set_mode(drv->first_bss, nlmode)) {
                nl80211_remove_monitor_interface(drv);
                return -1;
        }

        if (params->freq.freq &&
            nl80211_set_channel(drv->first_bss, &params->freq, 0)) {
                if (old_mode != nlmode)
                        wpa_driver_nl80211_set_mode(drv->first_bss, old_mode);
                nl80211_remove_monitor_interface(drv);
                return -1;
        }

        return 0;
}


static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv,
                              int reset_mode)
{
        struct nl_msg *msg;
        int ret;

        msg = nl80211_drv_msg(drv, 0, NL80211_CMD_LEAVE_IBSS);
        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
                           "(%s)", ret, strerror(-ret));
        } else {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Leave IBSS request sent successfully");
        }

        if (reset_mode &&
            wpa_driver_nl80211_set_mode(drv->first_bss,
                                        NL80211_IFTYPE_STATION)) {
                wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
                           "station mode");
        }

        return ret;
}


static int nl80211_ht_vht_overrides(struct nl_msg *msg,
                                    struct wpa_driver_associate_params *params)
{
        if (params->disable_ht && nla_put_flag(msg, NL80211_ATTR_DISABLE_HT))
                return -1;

        if (params->htcaps && params->htcaps_mask) {
                int sz = sizeof(struct ieee80211_ht_capabilities);
                wpa_hexdump(MSG_DEBUG, "  * htcaps", params->htcaps, sz);
                wpa_hexdump(MSG_DEBUG, "  * htcaps_mask",
                            params->htcaps_mask, sz);
                if (nla_put(msg, NL80211_ATTR_HT_CAPABILITY, sz,
                            params->htcaps) ||
                    nla_put(msg, NL80211_ATTR_HT_CAPABILITY_MASK, sz,
                            params->htcaps_mask))
                        return -1;
        }

#ifdef CONFIG_VHT_OVERRIDES
        if (params->disable_vht) {
                wpa_printf(MSG_DEBUG, "  * VHT disabled");
                if (nla_put_flag(msg, NL80211_ATTR_DISABLE_VHT))
                        return -1;
        }

        if (params->vhtcaps && params->vhtcaps_mask) {
                int sz = sizeof(struct ieee80211_vht_capabilities);
                wpa_hexdump(MSG_DEBUG, "  * vhtcaps", params->vhtcaps, sz);
                wpa_hexdump(MSG_DEBUG, "  * vhtcaps_mask",
                            params->vhtcaps_mask, sz);
                if (nla_put(msg, NL80211_ATTR_VHT_CAPABILITY, sz,
                            params->vhtcaps) ||
                    nla_put(msg, NL80211_ATTR_VHT_CAPABILITY_MASK, sz,
                            params->vhtcaps_mask))
                        return -1;
        }
#endif /* CONFIG_VHT_OVERRIDES */

        return 0;
}


static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
                                   struct wpa_driver_associate_params *params)
{
        struct nl_msg *msg;
        int ret = -1;
        int count = 0;

        wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);

        if (wpa_driver_nl80211_set_mode_ibss(drv->first_bss, &params->freq)) {
                wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
                           "IBSS mode");
                return -1;
        }

retry:
        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_JOIN_IBSS)) ||
            params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
                goto fail;

        wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
                          params->ssid, params->ssid_len);
        if (nla_put(msg, NL80211_ATTR_SSID, params->ssid_len, params->ssid))
                goto fail;
        os_memcpy(drv->ssid, params->ssid, params->ssid_len);
        drv->ssid_len = params->ssid_len;

        if (nl80211_put_freq_params(msg, &params->freq) < 0 ||
            nl80211_put_beacon_int(msg, params->beacon_int))
                goto fail;

        ret = nl80211_set_conn_keys(params, msg);
        if (ret)
                goto fail;

        if (params->bssid && params->fixed_bssid) {
                wpa_printf(MSG_DEBUG, "  * BSSID=" MACSTR,
                           MAC2STR(params->bssid));
                if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid))
                        goto fail;
        }

        if (params->fixed_freq) {
                wpa_printf(MSG_DEBUG, "  * fixed_freq");
                if (nla_put_flag(msg, NL80211_ATTR_FREQ_FIXED))
                        goto fail;
        }

        if (params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X ||
            params->key_mgmt_suite == WPA_KEY_MGMT_PSK ||
            params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X_SHA256 ||
            params->key_mgmt_suite == WPA_KEY_MGMT_PSK_SHA256) {
                wpa_printf(MSG_DEBUG, "  * control port");
                if (nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT))
                        goto fail;
        }

        if (params->wpa_ie) {
                wpa_hexdump(MSG_DEBUG,
                            "  * Extra IEs for Beacon/Probe Response frames",
                            params->wpa_ie, params->wpa_ie_len);
                if (nla_put(msg, NL80211_ATTR_IE, params->wpa_ie_len,
                            params->wpa_ie))
                        goto fail;
        }

        ret = nl80211_ht_vht_overrides(msg, params);
        if (ret < 0)
                goto fail;

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        msg = NULL;
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
                           ret, strerror(-ret));
                count++;
                if (ret == -EALREADY && count == 1) {
                        wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
                                   "forced leave");
                        nl80211_leave_ibss(drv, 0);
                        nlmsg_free(msg);
                        goto retry;
                }
        } else {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Join IBSS request sent successfully");
        }

fail:
        nlmsg_free(msg);
        return ret;
}


static int nl80211_connect_common(struct wpa_driver_nl80211_data *drv,
                                  struct wpa_driver_associate_params *params,
                                  struct nl_msg *msg)
{
        if (params->bssid) {
                wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
                           MAC2STR(params->bssid));
                if (nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid))
                        return -1;
        }

        if (params->bssid_hint) {
                wpa_printf(MSG_DEBUG, "  * bssid_hint=" MACSTR,
                           MAC2STR(params->bssid_hint));
                if (nla_put(msg, NL80211_ATTR_MAC_HINT, ETH_ALEN,
                            params->bssid_hint))
                        return -1;
        }

        if (params->freq.freq) {
                wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq.freq);
                if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
                                params->freq.freq))
                        return -1;
                drv->assoc_freq = params->freq.freq;
        } else
                drv->assoc_freq = 0;

        if (params->freq_hint) {
                wpa_printf(MSG_DEBUG, "  * freq_hint=%d", params->freq_hint);
                if (nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ_HINT,
                                params->freq_hint))
                        return -1;
        }

        if (params->bg_scan_period >= 0) {
                wpa_printf(MSG_DEBUG, "  * bg scan period=%d",
                           params->bg_scan_period);
                if (nla_put_u16(msg, NL80211_ATTR_BG_SCAN_PERIOD,
                                params->bg_scan_period))
                        return -1;
        }

        if (params->ssid) {
                wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
                                  params->ssid, params->ssid_len);
                if (nla_put(msg, NL80211_ATTR_SSID, params->ssid_len,
                            params->ssid))
                        return -1;
                if (params->ssid_len > sizeof(drv->ssid))
                        return -1;
                os_memcpy(drv->ssid, params->ssid, params->ssid_len);
                drv->ssid_len = params->ssid_len;
        }

        wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
        if (params->wpa_ie &&
            nla_put(msg, NL80211_ATTR_IE, params->wpa_ie_len, params->wpa_ie))
                return -1;

        if (params->wpa_proto) {
                enum nl80211_wpa_versions ver = 0;

                if (params->wpa_proto & WPA_PROTO_WPA)
                        ver |= NL80211_WPA_VERSION_1;
                if (params->wpa_proto & WPA_PROTO_RSN)
                        ver |= NL80211_WPA_VERSION_2;

                wpa_printf(MSG_DEBUG, "  * WPA Versions 0x%x", ver);
                if (nla_put_u32(msg, NL80211_ATTR_WPA_VERSIONS, ver))
                        return -1;
        }

        if (params->pairwise_suite != WPA_CIPHER_NONE) {
                u32 cipher = wpa_cipher_to_cipher_suite(params->pairwise_suite);
                wpa_printf(MSG_DEBUG, "  * pairwise=0x%x", cipher);
                if (nla_put_u32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE,
                                cipher))
                        return -1;
        }

        if (params->group_suite == WPA_CIPHER_GTK_NOT_USED &&
            !(drv->capa.enc & WPA_DRIVER_CAPA_ENC_GTK_NOT_USED)) {
                /*
                 * This is likely to work even though many drivers do not
                 * advertise support for operations without GTK.
                 */
                wpa_printf(MSG_DEBUG, "  * skip group cipher configuration for GTK_NOT_USED due to missing driver support advertisement");
        } else if (params->group_suite != WPA_CIPHER_NONE) {
                u32 cipher = wpa_cipher_to_cipher_suite(params->group_suite);
                wpa_printf(MSG_DEBUG, "  * group=0x%x", cipher);
                if (nla_put_u32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher))
                        return -1;
        }

        if (params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X ||
            params->key_mgmt_suite == WPA_KEY_MGMT_PSK ||
            params->key_mgmt_suite == WPA_KEY_MGMT_FT_IEEE8021X ||
            params->key_mgmt_suite == WPA_KEY_MGMT_FT_PSK ||
            params->key_mgmt_suite == WPA_KEY_MGMT_CCKM ||
            params->key_mgmt_suite == WPA_KEY_MGMT_OSEN ||
            params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X_SHA256 ||
            params->key_mgmt_suite == WPA_KEY_MGMT_PSK_SHA256 ||
            params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X_SUITE_B ||
            params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192) {
                int mgmt = WLAN_AKM_SUITE_PSK;

                switch (params->key_mgmt_suite) {
                case WPA_KEY_MGMT_CCKM:
                        mgmt = WLAN_AKM_SUITE_CCKM;
                        break;
                case WPA_KEY_MGMT_IEEE8021X:
                        mgmt = WLAN_AKM_SUITE_8021X;
                        break;
                case WPA_KEY_MGMT_FT_IEEE8021X:
                        mgmt = WLAN_AKM_SUITE_FT_8021X;
                        break;
                case WPA_KEY_MGMT_FT_PSK:
                        mgmt = WLAN_AKM_SUITE_FT_PSK;
                        break;
                case WPA_KEY_MGMT_IEEE8021X_SHA256:
                        mgmt = WLAN_AKM_SUITE_8021X_SHA256;
                        break;
                case WPA_KEY_MGMT_PSK_SHA256:
                        mgmt = WLAN_AKM_SUITE_PSK_SHA256;
                        break;
                case WPA_KEY_MGMT_OSEN:
                        mgmt = WLAN_AKM_SUITE_OSEN;
                        break;
                case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
                        mgmt = WLAN_AKM_SUITE_8021X_SUITE_B;
                        break;
                case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
                        mgmt = WLAN_AKM_SUITE_8021X_SUITE_B_192;
                        break;
                case WPA_KEY_MGMT_PSK:
                default:
                        mgmt = WLAN_AKM_SUITE_PSK;
                        break;
                }
                wpa_printf(MSG_DEBUG, "  * akm=0x%x", mgmt);
                if (nla_put_u32(msg, NL80211_ATTR_AKM_SUITES, mgmt))
                        return -1;
        }

        if (nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT))
                return -1;

        if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED &&
            nla_put_u32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED))
                return -1;

        if (params->rrm_used) {
                u32 drv_rrm_flags = drv->capa.rrm_flags;
                if (!(drv_rrm_flags &
                      WPA_DRIVER_FLAGS_DS_PARAM_SET_IE_IN_PROBES) ||
                    !(drv_rrm_flags & WPA_DRIVER_FLAGS_QUIET) ||
                    nla_put_flag(msg, NL80211_ATTR_USE_RRM))
                        return -1;
        }

        if (nl80211_ht_vht_overrides(msg, params) < 0)
                return -1;

        if (params->p2p)
                wpa_printf(MSG_DEBUG, "  * P2P group");

        if (params->pbss) {
                wpa_printf(MSG_DEBUG, "  * PBSS");
                if (nla_put_flag(msg, NL80211_ATTR_PBSS))
                        return -1;
        }

        drv->connect_reassoc = 0;
        if (params->prev_bssid) {
                wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
                           MAC2STR(params->prev_bssid));
                if (nla_put(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
                            params->prev_bssid))
                        return -1;
                drv->connect_reassoc = 1;
        }

        return 0;
}


static int wpa_driver_nl80211_try_connect(
        struct wpa_driver_nl80211_data *drv,
        struct wpa_driver_associate_params *params)
{
        struct nl_msg *msg;
        enum nl80211_auth_type type;
        int ret;
        int algs;

#ifdef CONFIG_DRIVER_NL80211_QCA
        if (params->req_key_mgmt_offload && params->psk &&
            (params->key_mgmt_suite == WPA_KEY_MGMT_PSK ||
             params->key_mgmt_suite == WPA_KEY_MGMT_PSK_SHA256 ||
             params->key_mgmt_suite == WPA_KEY_MGMT_FT_PSK)) {
                wpa_printf(MSG_DEBUG, "nl80211: Key management set PSK");
                ret = issue_key_mgmt_set_key(drv, params->psk, 32);
                if (ret)
                        return ret;
        }
#endif /* CONFIG_DRIVER_NL80211_QCA */

        wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
        msg = nl80211_drv_msg(drv, 0, NL80211_CMD_CONNECT);
        if (!msg)
                return -1;

        ret = nl80211_connect_common(drv, params, msg);
        if (ret)
                goto fail;

        algs = 0;
        if (params->auth_alg & WPA_AUTH_ALG_OPEN)
                algs++;
        if (params->auth_alg & WPA_AUTH_ALG_SHARED)
                algs++;
        if (params->auth_alg & WPA_AUTH_ALG_LEAP)
                algs++;
        if (algs > 1) {
                wpa_printf(MSG_DEBUG, "  * Leave out Auth Type for automatic "
                           "selection");
                goto skip_auth_type;
        }

        if (params->auth_alg & WPA_AUTH_ALG_OPEN)
                type = NL80211_AUTHTYPE_OPEN_SYSTEM;
        else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
                type = NL80211_AUTHTYPE_SHARED_KEY;
        else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
                type = NL80211_AUTHTYPE_NETWORK_EAP;
        else if (params->auth_alg & WPA_AUTH_ALG_FT)
                type = NL80211_AUTHTYPE_FT;
        else
                goto fail;

        wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
        if (nla_put_u32(msg, NL80211_ATTR_AUTH_TYPE, type))
                goto fail;

skip_auth_type:
        ret = nl80211_set_conn_keys(params, msg);
        if (ret)
                goto fail;

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        msg = NULL;
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
                           "(%s)", ret, strerror(-ret));
        } else {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Connect request send successfully");
        }

fail:
        nlmsg_free(msg);
        return ret;

}


static int wpa_driver_nl80211_connect(
        struct wpa_driver_nl80211_data *drv,
        struct wpa_driver_associate_params *params)
{
        int ret;

        /* Store the connection attempted bssid for future use */
        if (params->bssid)
                os_memcpy(drv->auth_attempt_bssid, params->bssid, ETH_ALEN);
        else
                os_memset(drv->auth_attempt_bssid, 0, ETH_ALEN);

        ret = wpa_driver_nl80211_try_connect(drv, params);
        if (ret == -EALREADY) {
                /*
                 * cfg80211 does not currently accept new connections if
                 * we are already connected. As a workaround, force
                 * disconnection and try again.
                 */
                wpa_printf(MSG_DEBUG, "nl80211: Explicitly "
                           "disconnecting before reassociation "
                           "attempt");
                if (wpa_driver_nl80211_disconnect(
                            drv, WLAN_REASON_PREV_AUTH_NOT_VALID))
                        return -1;
                ret = wpa_driver_nl80211_try_connect(drv, params);
        }
        return ret;
}


static int wpa_driver_nl80211_associate(
        void *priv, struct wpa_driver_associate_params *params)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        int ret = -1;
        struct nl_msg *msg;

        nl80211_unmask_11b_rates(bss);

        if (params->mode == IEEE80211_MODE_AP)
                return wpa_driver_nl80211_ap(drv, params);

        if (params->mode == IEEE80211_MODE_IBSS)
                return wpa_driver_nl80211_ibss(drv, params);

        if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
                enum nl80211_iftype nlmode = params->p2p ?
                        NL80211_IFTYPE_P2P_CLIENT : NL80211_IFTYPE_STATION;

                if (wpa_driver_nl80211_set_mode(priv, nlmode) < 0)
                        return -1;
                return wpa_driver_nl80211_connect(drv, params);
        }

        nl80211_mark_disconnected(drv);

        wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
                   drv->ifindex);
        msg = nl80211_drv_msg(drv, 0, NL80211_CMD_ASSOCIATE);
        if (!msg)
                return -1;

        ret = nl80211_connect_common(drv, params, msg);
        if (ret)
                goto fail;

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        msg = NULL;
        if (ret) {
                wpa_dbg(drv->ctx, MSG_DEBUG,
                        "nl80211: MLME command failed (assoc): ret=%d (%s)",
                        ret, strerror(-ret));
                nl80211_dump_scan(drv);
        } else {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Association request send successfully");
        }

fail:
        nlmsg_free(msg);
        return ret;
}


static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
                            int ifindex, enum nl80211_iftype mode)
{
        struct nl_msg *msg;
        int ret = -ENOBUFS;

        wpa_printf(MSG_DEBUG, "nl80211: Set mode ifindex %d iftype %d (%s)",
                   ifindex, mode, nl80211_iftype_str(mode));

        msg = nl80211_cmd_msg(drv->first_bss, 0, NL80211_CMD_SET_INTERFACE);
        if (!msg || nla_put_u32(msg, NL80211_ATTR_IFTYPE, mode))
                goto fail;

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        msg = NULL;
        if (!ret)
                return 0;
fail:
        nlmsg_free(msg);
        wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
                   " %d (%s)", ifindex, mode, ret, strerror(-ret));
        return ret;
}


static int wpa_driver_nl80211_set_mode_impl(
                struct i802_bss *bss,
                enum nl80211_iftype nlmode,
                struct hostapd_freq_params *desired_freq_params)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        int ret = -1;
        int i;
        int was_ap = is_ap_interface(drv->nlmode);
        int res;
        int mode_switch_res;

        mode_switch_res = nl80211_set_mode(drv, drv->ifindex, nlmode);
        if (mode_switch_res && nlmode == nl80211_get_ifmode(bss))
                mode_switch_res = 0;

        if (mode_switch_res == 0) {
                drv->nlmode = nlmode;
                ret = 0;
                goto done;
        }

        if (mode_switch_res == -ENODEV)
                return -1;

        if (nlmode == drv->nlmode) {
                wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
                           "requested mode - ignore error");
                ret = 0;
                goto done; /* Already in the requested mode */
        }

        /* mac80211 doesn't allow mode changes while the device is up, so
         * take the device down, try to set the mode again, and bring the
         * device back up.
         */
        wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting "
                   "interface down");
        for (i = 0; i < 10; i++) {
                res = i802_set_iface_flags(bss, 0);
                if (res == -EACCES || res == -ENODEV)
                        break;
                if (res != 0) {
                        wpa_printf(MSG_DEBUG, "nl80211: Failed to set "
                                   "interface down");
                        os_sleep(0, 100000);
                        continue;
                }

                /*
                 * Setting the mode will fail for some drivers if the phy is
                 * on a frequency that the mode is disallowed in.
                 */
                if (desired_freq_params) {
                        res = nl80211_set_channel(bss, desired_freq_params, 0);
                        if (res) {
                                wpa_printf(MSG_DEBUG,
                                           "nl80211: Failed to set frequency on interface");
                        }
                }

                /* Try to set the mode again while the interface is down */
                mode_switch_res = nl80211_set_mode(drv, drv->ifindex, nlmode);
                if (mode_switch_res == -EBUSY) {
                        wpa_printf(MSG_DEBUG,
                                   "nl80211: Delaying mode set while interface going down");
                        os_sleep(0, 100000);
                        continue;
                }
                ret = mode_switch_res;
                break;
        }

        if (!ret) {
                wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
                           "interface is down");
                drv->nlmode = nlmode;
                drv->ignore_if_down_event = 1;
        }

        /* Bring the interface back up */
        res = linux_set_iface_flags(drv->global->ioctl_sock, bss->ifname, 1);
        if (res != 0) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Failed to set interface up after switching mode");
                ret = -1;
        }

done:
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
                           "from %d failed", nlmode, drv->nlmode);
                return ret;
        }

        if (is_p2p_net_interface(nlmode)) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Interface %s mode change to P2P - disable 11b rates",
                           bss->ifname);
                nl80211_disable_11b_rates(drv, drv->ifindex, 1);
        } else if (drv->disabled_11b_rates) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Interface %s mode changed to non-P2P - re-enable 11b rates",
                           bss->ifname);
                nl80211_disable_11b_rates(drv, drv->ifindex, 0);
        }

        if (is_ap_interface(nlmode)) {
                nl80211_mgmt_unsubscribe(bss, "start AP");
                /* Setup additional AP mode functionality if needed */
                if (nl80211_setup_ap(bss))
                        return -1;
        } else if (was_ap) {
                /* Remove additional AP mode functionality */
                nl80211_teardown_ap(bss);
        } else {
                nl80211_mgmt_unsubscribe(bss, "mode change");
        }

        if (is_mesh_interface(nlmode) &&
            nl80211_mgmt_subscribe_mesh(bss))
                return -1;

        if (!bss->in_deinit && !is_ap_interface(nlmode) &&
            !is_mesh_interface(nlmode) &&
            nl80211_mgmt_subscribe_non_ap(bss) < 0)
                wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
                           "frame processing - ignore for now");

        return 0;
}


int wpa_driver_nl80211_set_mode(struct i802_bss *bss,
                                enum nl80211_iftype nlmode)
{
        return wpa_driver_nl80211_set_mode_impl(bss, nlmode, NULL);
}


static int wpa_driver_nl80211_set_mode_ibss(struct i802_bss *bss,
                                            struct hostapd_freq_params *freq)
{
        return wpa_driver_nl80211_set_mode_impl(bss, NL80211_IFTYPE_ADHOC,
                                                freq);
}


static int wpa_driver_nl80211_get_capa(void *priv,
                                       struct wpa_driver_capa *capa)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;

        if (!drv->has_capability)
                return -1;
        os_memcpy(capa, &drv->capa, sizeof(*capa));
        if (drv->extended_capa && drv->extended_capa_mask) {
                capa->extended_capa = drv->extended_capa;
                capa->extended_capa_mask = drv->extended_capa_mask;
                capa->extended_capa_len = drv->extended_capa_len;
        }

        return 0;
}


static int wpa_driver_nl80211_set_operstate(void *priv, int state)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;

        wpa_printf(MSG_DEBUG, "nl80211: Set %s operstate %d->%d (%s)",
                   bss->ifname, drv->operstate, state,
                   state ? "UP" : "DORMANT");
        drv->operstate = state;
        return netlink_send_oper_ifla(drv->global->netlink, drv->ifindex, -1,
                                      state ? IF_OPER_UP : IF_OPER_DORMANT);
}


static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        struct nl80211_sta_flag_update upd;
        int ret;

        if (!drv->associated && is_zero_ether_addr(drv->bssid) && !authorized) {
                wpa_printf(MSG_DEBUG, "nl80211: Skip set_supp_port(unauthorized) while not associated");
                return 0;
        }

        wpa_printf(MSG_DEBUG, "nl80211: Set supplicant port %sauthorized for "
                   MACSTR, authorized ? "" : "un", MAC2STR(drv->bssid));

        os_memset(&upd, 0, sizeof(upd));
        upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
        if (authorized)
                upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);

        if (!(msg = nl80211_bss_msg(bss, 0, NL80211_CMD_SET_STATION)) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid) ||
            nla_put(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (!ret)
                return 0;
        wpa_printf(MSG_DEBUG, "nl80211: Failed to set STA flag: %d (%s)",
                   ret, strerror(-ret));
        return ret;
}


/* Set kernel driver on given frequency (MHz) */
static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
{
        struct i802_bss *bss = priv;
        return nl80211_set_channel(bss, freq, 0);
}


static inline int min_int(int a, int b)
{
        if (a < b)
                return a;
        return b;
}


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

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

        /*
         * TODO: validate the key index and mac address!
         * Otherwise, there's a race condition as soon as
         * the kernel starts sending key notifications.
         */

        if (tb[NL80211_ATTR_KEY_SEQ])
                memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
                       min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
        return NL_SKIP;
}


static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
                           int idx, u8 *seq)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;

        msg = nl80211_ifindex_msg(drv, if_nametoindex(iface), 0,
                                  NL80211_CMD_GET_KEY);
        if (!msg ||
            (addr && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) ||
            nla_put_u8(msg, NL80211_ATTR_KEY_IDX, idx)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        memset(seq, 0, 6);

        return send_and_recv_msgs(drv, msg, get_key_handler, seq);
}


static int i802_set_rts(void *priv, int rts)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;
        u32 val;

        if (rts >= 2347)
                val = (u32) -1;
        else
                val = rts;

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_SET_WIPHY)) ||
            nla_put_u32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (!ret)
                return 0;
        wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
                   "%d (%s)", rts, ret, strerror(-ret));
        return ret;
}


static int i802_set_frag(void *priv, int frag)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;
        u32 val;

        if (frag >= 2346)
                val = (u32) -1;
        else
                val = frag;

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_SET_WIPHY)) ||
            nla_put_u32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (!ret)
                return 0;
        wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
                   "%d: %d (%s)", frag, ret, strerror(-ret));
        return ret;
}


static int i802_flush(void *priv)
{
        struct i802_bss *bss = priv;
        struct nl_msg *msg;
        int res;

        wpa_printf(MSG_DEBUG, "nl80211: flush -> DEL_STATION %s (all)",
                   bss->ifname);

        /*
         * XXX: FIX! this needs to flush all VLANs too
         */
        msg = nl80211_bss_msg(bss, 0, NL80211_CMD_DEL_STATION);
        res = send_and_recv_msgs(bss->drv, msg, NULL, NULL);
        if (res) {
                wpa_printf(MSG_DEBUG, "nl80211: Station flush failed: ret=%d "
                           "(%s)", res, strerror(-res));
        }
        return res;
}


static int get_sta_handler(struct nl_msg *msg, void *arg)
{
        struct nlattr *tb[NL80211_ATTR_MAX + 1];
        struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
        struct hostap_sta_driver_data *data = arg;
        struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
        static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
                [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
                [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
                [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
                [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
                [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
                [NL80211_STA_INFO_TX_FAILED] = { .type = NLA_U32 },
                [NL80211_STA_INFO_RX_BYTES64] = { .type = NLA_U64 },
                [NL80211_STA_INFO_TX_BYTES64] = { .type = NLA_U64 },
        };

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

        /*
         * TODO: validate the interface and mac address!
         * Otherwise, there's a race condition as soon as
         * the kernel starts sending station notifications.
         */

        if (!tb[NL80211_ATTR_STA_INFO]) {
                wpa_printf(MSG_DEBUG, "sta stats missing!");
                return NL_SKIP;
        }
        if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
                             tb[NL80211_ATTR_STA_INFO],
                             stats_policy)) {
                wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
                return NL_SKIP;
        }

        if (stats[NL80211_STA_INFO_INACTIVE_TIME])
                data->inactive_msec =
                        nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
        /* For backwards compatibility, fetch the 32-bit counters first. */
        if (stats[NL80211_STA_INFO_RX_BYTES])
                data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
        if (stats[NL80211_STA_INFO_TX_BYTES])
                data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
        if (stats[NL80211_STA_INFO_RX_BYTES64] &&
            stats[NL80211_STA_INFO_TX_BYTES64]) {
                /*
                 * The driver supports 64-bit counters, so use them to override
                 * the 32-bit values.
                 */
                data->rx_bytes =
                        nla_get_u64(stats[NL80211_STA_INFO_RX_BYTES64]);
                data->tx_bytes =
                        nla_get_u64(stats[NL80211_STA_INFO_TX_BYTES64]);
                data->bytes_64bit = 1;
        }
        if (stats[NL80211_STA_INFO_RX_PACKETS])
                data->rx_packets =
                        nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
        if (stats[NL80211_STA_INFO_TX_PACKETS])
                data->tx_packets =
                        nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
        if (stats[NL80211_STA_INFO_TX_FAILED])
                data->tx_retry_failed =
                        nla_get_u32(stats[NL80211_STA_INFO_TX_FAILED]);

        return NL_SKIP;
}

static int i802_read_sta_data(struct i802_bss *bss,
                              struct hostap_sta_driver_data *data,
                              const u8 *addr)
{
        struct nl_msg *msg;

        os_memset(data, 0, sizeof(*data));

        if (!(msg = nl80211_bss_msg(bss, 0, NL80211_CMD_GET_STATION)) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        return send_and_recv_msgs(bss->drv, msg, get_sta_handler, data);
}


static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
                                    int cw_min, int cw_max, int burst_time)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        struct nlattr *txq, *params;

        msg = nl80211_bss_msg(bss, 0, NL80211_CMD_SET_WIPHY);
        if (!msg)
                return -1;

        txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
        if (!txq)
                goto fail;

        /* We are only sending parameters for a single TXQ at a time */
        params = nla_nest_start(msg, 1);
        if (!params)
                goto fail;

        switch (queue) {
        case 0:
                if (nla_put_u8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_VO))
                        goto fail;
                break;
        case 1:
                if (nla_put_u8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_VI))
                        goto fail;
                break;
        case 2:
                if (nla_put_u8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_BE))
                        goto fail;
                break;
        case 3:
                if (nla_put_u8(msg, NL80211_TXQ_ATTR_QUEUE, NL80211_TXQ_Q_BK))
                        goto fail;
                break;
        }
        /* Burst time is configured in units of 0.1 msec and TXOP parameter in
         * 32 usec, so need to convert the value here. */
        if (nla_put_u16(msg, NL80211_TXQ_ATTR_TXOP,
                        (burst_time * 100 + 16) / 32) ||
            nla_put_u16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min) ||
            nla_put_u16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max) ||
            nla_put_u8(msg, NL80211_TXQ_ATTR_AIFS, aifs))
                goto fail;

        nla_nest_end(msg, params);

        nla_nest_end(msg, txq);

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


static int i802_set_sta_vlan(struct i802_bss *bss, const u8 *addr,
                             const char *ifname, int vlan_id)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;

        wpa_printf(MSG_DEBUG, "nl80211: %s[%d]: set_sta_vlan(" MACSTR
                   ", ifname=%s[%d], vlan_id=%d)",
                   bss->ifname, if_nametoindex(bss->ifname),
                   MAC2STR(addr), ifname, if_nametoindex(ifname), vlan_id);
        if (!(msg = nl80211_bss_msg(bss, 0, NL80211_CMD_SET_STATION)) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
            nla_put_u32(msg, NL80211_ATTR_STA_VLAN, if_nametoindex(ifname))) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret < 0) {
                wpa_printf(MSG_ERROR, "nl80211: NL80211_ATTR_STA_VLAN (addr="
                           MACSTR " ifname=%s vlan_id=%d) failed: %d (%s)",
                           MAC2STR(addr), ifname, vlan_id, ret,
                           strerror(-ret));
        }
        return ret;
}


static int i802_get_inact_sec(void *priv, const u8 *addr)
{
        struct hostap_sta_driver_data data;
        int ret;

        data.inactive_msec = (unsigned long) -1;
        ret = i802_read_sta_data(priv, &data, addr);
        if (ret == -ENOENT)
                return -ENOENT;
        if (ret || data.inactive_msec == (unsigned long) -1)
                return -1;
        return data.inactive_msec / 1000;
}


static int i802_sta_clear_stats(void *priv, const u8 *addr)
{
#if 0
        /* TODO */
#endif
        return 0;
}


static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
                           int reason)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct ieee80211_mgmt mgmt;

        if (is_mesh_interface(drv->nlmode))
                return -1;

        if (drv->device_ap_sme)
                return wpa_driver_nl80211_sta_remove(bss, addr, 1, reason);

        memset(&mgmt, 0, sizeof(mgmt));
        mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
                                          WLAN_FC_STYPE_DEAUTH);
        memcpy(mgmt.da, addr, ETH_ALEN);
        memcpy(mgmt.sa, own_addr, ETH_ALEN);
        memcpy(mgmt.bssid, own_addr, ETH_ALEN);
        mgmt.u.deauth.reason_code = host_to_le16(reason);
        return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
                                            IEEE80211_HDRLEN +
                                            sizeof(mgmt.u.deauth), 0, 0, 0, 0,
                                            0, NULL, 0);
}


static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
                             int reason)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct ieee80211_mgmt mgmt;

        if (is_mesh_interface(drv->nlmode))
                return -1;

        if (drv->device_ap_sme)
                return wpa_driver_nl80211_sta_remove(bss, addr, 0, reason);

        memset(&mgmt, 0, sizeof(mgmt));
        mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
                                          WLAN_FC_STYPE_DISASSOC);
        memcpy(mgmt.da, addr, ETH_ALEN);
        memcpy(mgmt.sa, own_addr, ETH_ALEN);
        memcpy(mgmt.bssid, own_addr, ETH_ALEN);
        mgmt.u.disassoc.reason_code = host_to_le16(reason);
        return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
                                            IEEE80211_HDRLEN +
                                            sizeof(mgmt.u.disassoc), 0, 0, 0, 0,
                                            0, NULL, 0);
}


static void dump_ifidx(struct wpa_driver_nl80211_data *drv)
{
        char buf[200], *pos, *end;
        int i, res;

        pos = buf;
        end = pos + sizeof(buf);

        for (i = 0; i < drv->num_if_indices; i++) {
                if (!drv->if_indices[i])
                        continue;
                res = os_snprintf(pos, end - pos, " %d(%d)",
                                  drv->if_indices[i],
                                  drv->if_indices_reason[i]);
                if (os_snprintf_error(end - pos, res))
                        break;
                pos += res;
        }
        *pos = '\0';

        wpa_printf(MSG_DEBUG, "nl80211: if_indices[%d]:%s",
                   drv->num_if_indices, buf);
}


static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx,
                      int ifidx_reason)
{
        int i;
        int *old, *old_reason;

        wpa_printf(MSG_DEBUG,
                   "nl80211: Add own interface ifindex %d (ifidx_reason %d)",
                   ifidx, ifidx_reason);
        if (have_ifidx(drv, ifidx, ifidx_reason)) {
                wpa_printf(MSG_DEBUG, "nl80211: ifindex %d already in the list",
                           ifidx);
                return;
        }
        for (i = 0; i < drv->num_if_indices; i++) {
                if (drv->if_indices[i] == 0) {
                        drv->if_indices[i] = ifidx;
                        drv->if_indices_reason[i] = ifidx_reason;
                        dump_ifidx(drv);
                        return;
                }
        }

        if (drv->if_indices != drv->default_if_indices)
                old = drv->if_indices;
        else
                old = NULL;

        if (drv->if_indices_reason != drv->default_if_indices_reason)
                old_reason = drv->if_indices_reason;
        else
                old_reason = NULL;

        drv->if_indices = os_realloc_array(old, drv->num_if_indices + 1,
                                           sizeof(int));
        drv->if_indices_reason = os_realloc_array(old_reason,
                                                  drv->num_if_indices + 1,
                                                  sizeof(int));
        if (!drv->if_indices) {
                if (!old)
                        drv->if_indices = drv->default_if_indices;
                else
                        drv->if_indices = old;
        }
        if (!drv->if_indices_reason) {
                if (!old_reason)
                        drv->if_indices_reason = drv->default_if_indices_reason;
                else
                        drv->if_indices_reason = old_reason;
        }
        if (!drv->if_indices || !drv->if_indices_reason) {
                wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
                           "interfaces");
                wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
                return;
        }
        if (!old)
                os_memcpy(drv->if_indices, drv->default_if_indices,
                          sizeof(drv->default_if_indices));
        if (!old_reason)
                os_memcpy(drv->if_indices_reason,
                          drv->default_if_indices_reason,
                          sizeof(drv->default_if_indices_reason));
        drv->if_indices[drv->num_if_indices] = ifidx;
        drv->if_indices_reason[drv->num_if_indices] = ifidx_reason;
        drv->num_if_indices++;
        dump_ifidx(drv);
}


static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx,
                      int ifidx_reason)
{
        int i;

        for (i = 0; i < drv->num_if_indices; i++) {
                if ((drv->if_indices[i] == ifidx || ifidx == IFIDX_ANY) &&
                    (drv->if_indices_reason[i] == ifidx_reason ||
                     ifidx_reason == IFIDX_ANY)) {
                        drv->if_indices[i] = 0;
                        break;
                }
        }
        dump_ifidx(drv);
}


static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx,
                      int ifidx_reason)
{
        int i;

        for (i = 0; i < drv->num_if_indices; i++)
                if (drv->if_indices[i] == ifidx &&
                    (drv->if_indices_reason[i] == ifidx_reason ||
                     ifidx_reason == IFIDX_ANY))
                        return 1;

        return 0;
}


static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val,
                            const char *bridge_ifname, char *ifname_wds)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        char name[IFNAMSIZ + 1];

        os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
        if (ifname_wds)
                os_strlcpy(ifname_wds, name, IFNAMSIZ + 1);

        wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
                   " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
        if (val) {
                if (!if_nametoindex(name)) {
                        if (nl80211_create_iface(drv, name,
                                                 NL80211_IFTYPE_AP_VLAN,
                                                 bss->addr, 1, NULL, NULL, 0) <
                            0)
                                return -1;
                        if (bridge_ifname &&
                            linux_br_add_if(drv->global->ioctl_sock,
                                            bridge_ifname, name) < 0)
                                return -1;
                }
                if (linux_set_iface_flags(drv->global->ioctl_sock, name, 1)) {
                        wpa_printf(MSG_ERROR, "nl80211: Failed to set WDS STA "
                                   "interface %s up", name);
                }
                return i802_set_sta_vlan(priv, addr, name, 0);
        } else {
                if (bridge_ifname)
                        linux_br_del_if(drv->global->ioctl_sock, bridge_ifname,
                                        name);

                i802_set_sta_vlan(priv, addr, bss->ifname, 0);
                nl80211_remove_iface(drv, if_nametoindex(name));
                return 0;
        }
}


static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
{
        struct wpa_driver_nl80211_data *drv = eloop_ctx;
        struct sockaddr_ll lladdr;
        unsigned char buf[3000];
        int len;
        socklen_t fromlen = sizeof(lladdr);

        len = recvfrom(sock, buf, sizeof(buf), 0,
                       (struct sockaddr *)&lladdr, &fromlen);
        if (len < 0) {
                wpa_printf(MSG_ERROR, "nl80211: EAPOL recv failed: %s",
                           strerror(errno));
                return;
        }

        if (have_ifidx(drv, lladdr.sll_ifindex, IFIDX_ANY))
                drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
}


static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
                             struct i802_bss *bss,
                             const char *brname, const char *ifname)
{
        int br_ifindex;
        char in_br[IFNAMSIZ];

        os_strlcpy(bss->brname, brname, IFNAMSIZ);
        br_ifindex = if_nametoindex(brname);
        if (br_ifindex == 0) {
                /*
                 * Bridge was configured, but the bridge device does
                 * not exist. Try to add it now.
                 */
                if (linux_br_add(drv->global->ioctl_sock, brname) < 0) {
                        wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
                                   "bridge interface %s: %s",
                                   brname, strerror(errno));
                        return -1;
                }
                bss->added_bridge = 1;
                br_ifindex = if_nametoindex(brname);
                add_ifidx(drv, br_ifindex, drv->ifindex);
        }
        bss->br_ifindex = br_ifindex;

        if (linux_br_get(in_br, ifname) == 0) {
                if (os_strcmp(in_br, brname) == 0)
                        return 0; /* already in the bridge */

                wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
                           "bridge %s", ifname, in_br);
                if (linux_br_del_if(drv->global->ioctl_sock, in_br, ifname) <
                    0) {
                        wpa_printf(MSG_ERROR, "nl80211: Failed to "
                                   "remove interface %s from bridge "
                                   "%s: %s",
                                   ifname, brname, strerror(errno));
                        return -1;
                }
        }

        wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
                   ifname, brname);
        if (linux_br_add_if(drv->global->ioctl_sock, brname, ifname) < 0) {
                wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
                           "into bridge %s: %s",
                           ifname, brname, strerror(errno));
                return -1;
        }
        bss->added_if_into_bridge = 1;

        return 0;
}


static void *i802_init(struct hostapd_data *hapd,
                       struct wpa_init_params *params)
{
        struct wpa_driver_nl80211_data *drv;
        struct i802_bss *bss;
        size_t i;
        char master_ifname[IFNAMSIZ];
        int ifindex, br_ifindex = 0;
        int br_added = 0;

        bss = wpa_driver_nl80211_drv_init(hapd, params->ifname,
                                          params->global_priv, 1,
                                          params->bssid, params->driver_params);
        if (bss == NULL)
                return NULL;

        drv = bss->drv;

        if (linux_br_get(master_ifname, params->ifname) == 0) {
                wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
                           params->ifname, master_ifname);
                br_ifindex = if_nametoindex(master_ifname);
                os_strlcpy(bss->brname, master_ifname, IFNAMSIZ);
        } else if ((params->num_bridge == 0 || !params->bridge[0]) &&
                   linux_master_get(master_ifname, params->ifname) == 0) {
                wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in master %s",
                        params->ifname, master_ifname);
                /* start listening for EAPOL on the master interface */
                add_ifidx(drv, if_nametoindex(master_ifname), drv->ifindex);

                /* check if master itself is under bridge */
                if (linux_br_get(master_ifname, master_ifname) == 0) {
                        wpa_printf(MSG_DEBUG, "nl80211: which is in bridge %s",
                                   master_ifname);
                        br_ifindex = if_nametoindex(master_ifname);
                        os_strlcpy(bss->brname, master_ifname, IFNAMSIZ);
                }
        } else {
                master_ifname[0] = '\0';
        }

        bss->br_ifindex = br_ifindex;

        for (i = 0; i < params->num_bridge; i++) {
                if (params->bridge[i]) {
                        ifindex = if_nametoindex(params->bridge[i]);
                        if (ifindex)
                                add_ifidx(drv, ifindex, drv->ifindex);
                        if (ifindex == br_ifindex)
                                br_added = 1;
                }
        }

        /* start listening for EAPOL on the default AP interface */
        add_ifidx(drv, drv->ifindex, IFIDX_ANY);

        if (params->num_bridge && params->bridge[0]) {
                if (i802_check_bridge(drv, bss, params->bridge[0],
                                      params->ifname) < 0)
                        goto failed;
                if (os_strcmp(params->bridge[0], master_ifname) != 0)
                        br_added = 1;
        }

        if (!br_added && br_ifindex &&
            (params->num_bridge == 0 || !params->bridge[0]))
                add_ifidx(drv, br_ifindex, drv->ifindex);

#ifdef CONFIG_LIBNL3_ROUTE
        if (bss->added_if_into_bridge) {
                drv->rtnl_sk = nl_socket_alloc();
                if (drv->rtnl_sk == NULL) {
                        wpa_printf(MSG_ERROR, "nl80211: Failed to allocate nl_sock");
                        goto failed;
                }

                if (nl_connect(drv->rtnl_sk, NETLINK_ROUTE)) {
                        wpa_printf(MSG_ERROR, "nl80211: Failed to connect nl_sock to NETLINK_ROUTE: %s",
                                   strerror(errno));
                        goto failed;
                }
        }
#endif /* CONFIG_LIBNL3_ROUTE */

        drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
        if (drv->eapol_sock < 0) {
                wpa_printf(MSG_ERROR, "nl80211: socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE) failed: %s",
                           strerror(errno));
                goto failed;
        }

        if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
        {
                wpa_printf(MSG_INFO, "nl80211: Could not register read socket for eapol");
                goto failed;
        }

        if (linux_get_ifhwaddr(drv->global->ioctl_sock, bss->ifname,
                               params->own_addr))
                goto failed;
        os_memcpy(drv->perm_addr, params->own_addr, ETH_ALEN);

        memcpy(bss->addr, params->own_addr, ETH_ALEN);

        return bss;

failed:
        wpa_driver_nl80211_deinit(bss);
        return NULL;
}


static void i802_deinit(void *priv)
{
        struct i802_bss *bss = priv;
        wpa_driver_nl80211_deinit(bss);
}


static enum nl80211_iftype wpa_driver_nl80211_if_type(
        enum wpa_driver_if_type type)
{
        switch (type) {
        case WPA_IF_STATION:
                return NL80211_IFTYPE_STATION;
        case WPA_IF_P2P_CLIENT:
        case WPA_IF_P2P_GROUP:
                return NL80211_IFTYPE_P2P_CLIENT;
        case WPA_IF_AP_VLAN:
                return NL80211_IFTYPE_AP_VLAN;
        case WPA_IF_AP_BSS:
                return NL80211_IFTYPE_AP;
        case WPA_IF_P2P_GO:
                return NL80211_IFTYPE_P2P_GO;
        case WPA_IF_P2P_DEVICE:
                return NL80211_IFTYPE_P2P_DEVICE;
        case WPA_IF_MESH:
                return NL80211_IFTYPE_MESH_POINT;
        default:
                return -1;
        }
}


static int nl80211_addr_in_use(struct nl80211_global *global, const u8 *addr)
{
        struct wpa_driver_nl80211_data *drv;
        dl_list_for_each(drv, &global->interfaces,
                         struct wpa_driver_nl80211_data, list) {
                if (os_memcmp(addr, drv->first_bss->addr, ETH_ALEN) == 0)
                        return 1;
        }
        return 0;
}


static int nl80211_vif_addr(struct wpa_driver_nl80211_data *drv, u8 *new_addr)
{
        unsigned int idx;

        if (!drv->global)
                return -1;

        os_memcpy(new_addr, drv->first_bss->addr, ETH_ALEN);
        for (idx = 0; idx < 64; idx++) {
                new_addr[0] = drv->first_bss->addr[0] | 0x02;
                new_addr[0] ^= idx << 2;
                if (!nl80211_addr_in_use(drv->global, new_addr))
                        break;
        }
        if (idx == 64)
                return -1;

        wpa_printf(MSG_DEBUG, "nl80211: Assigned new virtual interface address "
                   MACSTR, MAC2STR(new_addr));

        return 0;
}


struct wdev_info {
        u64 wdev_id;
        int wdev_id_set;
        u8 macaddr[ETH_ALEN];
};

static int nl80211_wdev_handler(struct nl_msg *msg, void *arg)
{
        struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
        struct nlattr *tb[NL80211_ATTR_MAX + 1];
        struct wdev_info *wi = arg;

        nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
                  genlmsg_attrlen(gnlh, 0), NULL);
        if (tb[NL80211_ATTR_WDEV]) {
                wi->wdev_id = nla_get_u64(tb[NL80211_ATTR_WDEV]);
                wi->wdev_id_set = 1;
        }

        if (tb[NL80211_ATTR_MAC])
                os_memcpy(wi->macaddr, nla_data(tb[NL80211_ATTR_MAC]),
                          ETH_ALEN);

        return NL_SKIP;
}


static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
                                     const char *ifname, const u8 *addr,
                                     void *bss_ctx, void **drv_priv,
                                     char *force_ifname, u8 *if_addr,
                                     const char *bridge, int use_existing,
                                     int setup_ap)
{
        enum nl80211_iftype nlmode;
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        int ifidx;
        int added = 1;

        if (addr)
                os_memcpy(if_addr, addr, ETH_ALEN);
        nlmode = wpa_driver_nl80211_if_type(type);
        if (nlmode == NL80211_IFTYPE_P2P_DEVICE) {
                struct wdev_info p2pdev_info;

                os_memset(&p2pdev_info, 0, sizeof(p2pdev_info));
                ifidx = nl80211_create_iface(drv, ifname, nlmode, addr,
                                             0, nl80211_wdev_handler,
                                             &p2pdev_info, use_existing);
                if (!p2pdev_info.wdev_id_set || ifidx != 0) {
                        wpa_printf(MSG_ERROR, "nl80211: Failed to create a P2P Device interface %s",
                                   ifname);
                        return -1;
                }

                drv->global->if_add_wdevid = p2pdev_info.wdev_id;
                drv->global->if_add_wdevid_set = p2pdev_info.wdev_id_set;
                if (!is_zero_ether_addr(p2pdev_info.macaddr))
                        os_memcpy(if_addr, p2pdev_info.macaddr, ETH_ALEN);
                wpa_printf(MSG_DEBUG, "nl80211: New P2P Device interface %s (0x%llx) created",
                           ifname,
                           (long long unsigned int) p2pdev_info.wdev_id);
        } else {
                ifidx = nl80211_create_iface(drv, ifname, nlmode, addr,
                                             0, NULL, NULL, use_existing);
                if (use_existing && ifidx == -ENFILE) {
                        added = 0;
                        ifidx = if_nametoindex(ifname);
                } else if (ifidx < 0) {
                        return -1;
                }
        }

        if (!addr) {
                if (nlmode == NL80211_IFTYPE_P2P_DEVICE)
                        os_memcpy(if_addr, bss->addr, ETH_ALEN);
                else if (linux_get_ifhwaddr(drv->global->ioctl_sock,
                                            ifname, if_addr) < 0) {
                        if (added)
                                nl80211_remove_iface(drv, ifidx);
                        return -1;
                }
        }

        if (!addr &&
            (type == WPA_IF_P2P_CLIENT || type == WPA_IF_P2P_GROUP ||
             type == WPA_IF_P2P_GO || type == WPA_IF_MESH ||
             type == WPA_IF_STATION)) {
                /* Enforce unique address */
                u8 new_addr[ETH_ALEN];

                if (linux_get_ifhwaddr(drv->global->ioctl_sock, ifname,
                                       new_addr) < 0) {
                        if (added)
                                nl80211_remove_iface(drv, ifidx);
                        return -1;
                }
                if (nl80211_addr_in_use(drv->global, new_addr)) {
                        wpa_printf(MSG_DEBUG, "nl80211: Allocate new address "
                                   "for interface %s type %d", ifname, type);
                        if (nl80211_vif_addr(drv, new_addr) < 0) {
                                if (added)
                                        nl80211_remove_iface(drv, ifidx);
                                return -1;
                        }
                        if (linux_set_ifhwaddr(drv->global->ioctl_sock, ifname,
                                               new_addr) < 0) {
                                if (added)
                                        nl80211_remove_iface(drv, ifidx);
                                return -1;
                        }
                }
                os_memcpy(if_addr, new_addr, ETH_ALEN);
        }

        if (type == WPA_IF_AP_BSS && setup_ap) {
                struct i802_bss *new_bss = os_zalloc(sizeof(*new_bss));
                if (new_bss == NULL) {
                        if (added)
                                nl80211_remove_iface(drv, ifidx);
                        return -1;
                }

                if (bridge &&
                    i802_check_bridge(drv, new_bss, bridge, ifname) < 0) {
                        wpa_printf(MSG_ERROR, "nl80211: Failed to add the new "
                                   "interface %s to a bridge %s",
                                   ifname, bridge);
                        if (added)
                                nl80211_remove_iface(drv, ifidx);
                        os_free(new_bss);
                        return -1;
                }

                if (linux_set_iface_flags(drv->global->ioctl_sock, ifname, 1))
                {
                        if (added)
                                nl80211_remove_iface(drv, ifidx);
                        os_free(new_bss);
                        return -1;
                }
                os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
                os_memcpy(new_bss->addr, if_addr, ETH_ALEN);
                new_bss->ifindex = ifidx;
                new_bss->drv = drv;
                new_bss->next = drv->first_bss->next;
                new_bss->freq = drv->first_bss->freq;
                new_bss->ctx = bss_ctx;
                new_bss->added_if = added;
                drv->first_bss->next = new_bss;
                if (drv_priv)
                        *drv_priv = new_bss;
                nl80211_init_bss(new_bss);

                /* Subscribe management frames for this WPA_IF_AP_BSS */
                if (nl80211_setup_ap(new_bss))
                        return -1;
        }

        if (drv->global)
                drv->global->if_add_ifindex = ifidx;

        /*
         * Some virtual interfaces need to process EAPOL packets and events on
         * the parent interface. This is used mainly with hostapd.
         */
        if (ifidx > 0 &&
            (drv->hostapd ||
             nlmode == NL80211_IFTYPE_AP_VLAN ||
             nlmode == NL80211_IFTYPE_WDS ||
             nlmode == NL80211_IFTYPE_MONITOR))
                add_ifidx(drv, ifidx, IFIDX_ANY);

        return 0;
}


static int wpa_driver_nl80211_if_remove(struct i802_bss *bss,
                                        enum wpa_driver_if_type type,
                                        const char *ifname)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        int ifindex = if_nametoindex(ifname);

        wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d added_if=%d",
                   __func__, type, ifname, ifindex, bss->added_if);
        if (ifindex > 0 && (bss->added_if || bss->ifindex != ifindex))
                nl80211_remove_iface(drv, ifindex);
        else if (ifindex > 0 && !bss->added_if) {
                struct wpa_driver_nl80211_data *drv2;
                dl_list_for_each(drv2, &drv->global->interfaces,
                                 struct wpa_driver_nl80211_data, list) {
                        del_ifidx(drv2, ifindex, IFIDX_ANY);
                        del_ifidx(drv2, IFIDX_ANY, ifindex);
                }
        }

        if (type != WPA_IF_AP_BSS)
                return 0;

        if (bss->added_if_into_bridge) {
                if (linux_br_del_if(drv->global->ioctl_sock, bss->brname,
                                    bss->ifname) < 0)
                        wpa_printf(MSG_INFO, "nl80211: Failed to remove "
                                   "interface %s from bridge %s: %s",
                                   bss->ifname, bss->brname, strerror(errno));
        }
        if (bss->added_bridge) {
                if (linux_br_del(drv->global->ioctl_sock, bss->brname) < 0)
                        wpa_printf(MSG_INFO, "nl80211: Failed to remove "
                                   "bridge %s: %s",
                                   bss->brname, strerror(errno));
        }

        if (bss != drv->first_bss) {
                struct i802_bss *tbss;

                wpa_printf(MSG_DEBUG, "nl80211: Not the first BSS - remove it");
                for (tbss = drv->first_bss; tbss; tbss = tbss->next) {
                        if (tbss->next == bss) {
                                tbss->next = bss->next;
                                /* Unsubscribe management frames */
                                nl80211_teardown_ap(bss);
                                nl80211_destroy_bss(bss);
                                if (!bss->added_if)
                                        i802_set_iface_flags(bss, 0);
                                os_free(bss);
                                bss = NULL;
                                break;
                        }
                }
                if (bss)
                        wpa_printf(MSG_INFO, "nl80211: %s - could not find "
                                   "BSS %p in the list", __func__, bss);
        } else {
                wpa_printf(MSG_DEBUG, "nl80211: First BSS - reassign context");
                nl80211_teardown_ap(bss);
                if (!bss->added_if && !drv->first_bss->next)
                        wpa_driver_nl80211_del_beacon(drv);
                nl80211_destroy_bss(bss);
                if (!bss->added_if)
                        i802_set_iface_flags(bss, 0);
                if (drv->first_bss->next) {
                        drv->first_bss = drv->first_bss->next;
                        drv->ctx = drv->first_bss->ctx;
                        os_free(bss);
                } else {
                        wpa_printf(MSG_DEBUG, "nl80211: No second BSS to reassign context to");
                }
        }

        return 0;
}


static int cookie_handler(struct nl_msg *msg, void *arg)
{
        struct nlattr *tb[NL80211_ATTR_MAX + 1];
        struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
        u64 *cookie = arg;
        nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
                  genlmsg_attrlen(gnlh, 0), NULL);
        if (tb[NL80211_ATTR_COOKIE])
                *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
        return NL_SKIP;
}


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_out, int no_cck, int no_ack,
                                  int offchanok, const u16 *csa_offs,
                                  size_t csa_offs_len)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        u64 cookie;
        int ret = -1;

        wpa_printf(MSG_MSGDUMP, "nl80211: CMD_FRAME freq=%u wait=%u no_cck=%d "
                   "no_ack=%d offchanok=%d",
                   freq, wait, no_cck, no_ack, offchanok);
        wpa_hexdump(MSG_MSGDUMP, "CMD_FRAME", buf, buf_len);

        if (!(msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_FRAME)) ||
            (freq && nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
            (wait && nla_put_u32(msg, NL80211_ATTR_DURATION, wait)) ||
            (offchanok && ((drv->capa.flags & WPA_DRIVER_FLAGS_OFFCHANNEL_TX) ||
                           drv->test_use_roc_tx) &&
             nla_put_flag(msg, NL80211_ATTR_OFFCHANNEL_TX_OK)) ||
            (no_cck && nla_put_flag(msg, NL80211_ATTR_TX_NO_CCK_RATE)) ||
            (no_ack && nla_put_flag(msg, NL80211_ATTR_DONT_WAIT_FOR_ACK)) ||
            (csa_offs && nla_put(msg, NL80211_ATTR_CSA_C_OFFSETS_TX,
                                 csa_offs_len * sizeof(u16), csa_offs)) ||
            nla_put(msg, NL80211_ATTR_FRAME, buf_len, buf))
                goto fail;

        cookie = 0;
        ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
        msg = NULL;
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: Frame command failed: ret=%d "
                           "(%s) (freq=%u wait=%u)", ret, strerror(-ret),
                           freq, wait);
        } else {
                wpa_printf(MSG_MSGDUMP, "nl80211: Frame TX command accepted%s; "
                           "cookie 0x%llx", no_ack ? " (no ACK)" : "",
                           (long long unsigned int) cookie);

                if (cookie_out)
                        *cookie_out = no_ack ? (u64) -1 : cookie;

                if (drv->num_send_action_cookies == MAX_SEND_ACTION_COOKIES) {
                        wpa_printf(MSG_DEBUG,
                                   "nl80211: Drop oldest pending send action cookie 0x%llx",
                                   (long long unsigned int)
                                   drv->send_action_cookies[0]);
                        os_memmove(&drv->send_action_cookies[0],
                                   &drv->send_action_cookies[1],
                                   (MAX_SEND_ACTION_COOKIES - 1) *
                                   sizeof(u64));
                        drv->num_send_action_cookies--;
                }
                drv->send_action_cookies[drv->num_send_action_cookies] = cookie;
                drv->num_send_action_cookies++;
        }

fail:
        nlmsg_free(msg);
        return ret;
}


static int wpa_driver_nl80211_send_action(struct i802_bss *bss,
                                          unsigned int freq,
                                          unsigned int wait_time,
                                          const u8 *dst, const u8 *src,
                                          const u8 *bssid,
                                          const u8 *data, size_t data_len,
                                          int no_cck)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        int ret = -1;
        u8 *buf;
        struct ieee80211_hdr *hdr;

        wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d, "
                   "freq=%u MHz wait=%d ms no_cck=%d)",
                   drv->ifindex, freq, wait_time, no_cck);

        buf = os_zalloc(24 + data_len);
        if (buf == NULL)
                return ret;
        os_memcpy(buf + 24, data, data_len);
        hdr = (struct ieee80211_hdr *) buf;
        hdr->frame_control =
                IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
        os_memcpy(hdr->addr1, dst, ETH_ALEN);
        os_memcpy(hdr->addr2, src, ETH_ALEN);
        os_memcpy(hdr->addr3, bssid, ETH_ALEN);

        if (is_ap_interface(drv->nlmode) &&
            (!(drv->capa.flags & WPA_DRIVER_FLAGS_OFFCHANNEL_TX) ||
             (int) freq == bss->freq || drv->device_ap_sme ||
             !drv->use_monitor))
                ret = wpa_driver_nl80211_send_mlme(bss, buf, 24 + data_len,
                                                   0, freq, no_cck, 1,
                                                   wait_time, NULL, 0);
        else
                ret = nl80211_send_frame_cmd(bss, freq, wait_time, buf,
                                             24 + data_len,
                                             &drv->send_action_cookie,
                                             no_cck, 0, 1, NULL, 0);

        os_free(buf);
        return ret;
}


static void nl80211_frame_wait_cancel(struct i802_bss *bss, u64 cookie)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;

        wpa_printf(MSG_DEBUG, "nl80211: Cancel TX frame wait: cookie=0x%llx",
                   (long long unsigned int) cookie);
        if (!(msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_FRAME_WAIT_CANCEL)) ||
            nla_put_u64(msg, NL80211_ATTR_COOKIE, cookie)) {
                nlmsg_free(msg);
                return;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret)
                wpa_printf(MSG_DEBUG, "nl80211: wait cancel failed: ret=%d "
                           "(%s)", ret, strerror(-ret));
}


static void wpa_driver_nl80211_send_action_cancel_wait(void *priv)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        unsigned int i;
        u64 cookie;

        /* Cancel the last pending TX cookie */
        nl80211_frame_wait_cancel(bss, drv->send_action_cookie);

        /*
         * Cancel the other pending TX cookies, if any. This is needed since
         * the driver may keep a list of all pending offchannel TX operations
         * and free up the radio only once they have expired or cancelled.
         */
        for (i = drv->num_send_action_cookies; i > 0; i--) {
                cookie = drv->send_action_cookies[i - 1];
                if (cookie != drv->send_action_cookie)
                        nl80211_frame_wait_cancel(bss, cookie);
        }
        drv->num_send_action_cookies = 0;
}


static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
                                                unsigned int duration)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;
        u64 cookie;

        if (!(msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_REMAIN_ON_CHANNEL)) ||
            nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
            nla_put_u32(msg, NL80211_ATTR_DURATION, duration)) {
                nlmsg_free(msg);
                return -1;
        }

        cookie = 0;
        ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
        if (ret == 0) {
                wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
                           "0x%llx for freq=%u MHz duration=%u",
                           (long long unsigned int) cookie, freq, duration);
                drv->remain_on_chan_cookie = cookie;
                drv->pending_remain_on_chan = 1;
                return 0;
        }
        wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
                   "(freq=%d duration=%u): %d (%s)",
                   freq, duration, ret, strerror(-ret));
        return -1;
}


static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;

        if (!drv->pending_remain_on_chan) {
                wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
                           "to cancel");
                return -1;
        }

        wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
                   "0x%llx",
                   (long long unsigned int) drv->remain_on_chan_cookie);

        msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL);
        if (!msg ||
            nla_put_u64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie)) {
                nlmsg_free(msg);
                return -1;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret == 0)
                return 0;
        wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
                   "%d (%s)", ret, strerror(-ret));
        return -1;
}


static int wpa_driver_nl80211_probe_req_report(struct i802_bss *bss, int report)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;

        if (!report) {
                if (bss->nl_preq && drv->device_ap_sme &&
                    is_ap_interface(drv->nlmode) && !bss->in_deinit &&
                    !bss->static_ap) {
                        /*
                         * Do not disable Probe Request reporting that was
                         * enabled in nl80211_setup_ap().
                         */
                        wpa_printf(MSG_DEBUG, "nl80211: Skip disabling of "
                                   "Probe Request reporting nl_preq=%p while "
                                   "in AP mode", bss->nl_preq);
                } else if (bss->nl_preq) {
                        wpa_printf(MSG_DEBUG, "nl80211: Disable Probe Request "
                                   "reporting nl_preq=%p", bss->nl_preq);
                        nl80211_destroy_eloop_handle(&bss->nl_preq);
                }
                return 0;
        }

        if (bss->nl_preq) {
                wpa_printf(MSG_DEBUG, "nl80211: Probe Request reporting "
                           "already on! nl_preq=%p", bss->nl_preq);
                return 0;
        }

        bss->nl_preq = nl_create_handle(drv->global->nl_cb, "preq");
        if (bss->nl_preq == NULL)
                return -1;
        wpa_printf(MSG_DEBUG, "nl80211: Enable Probe Request "
                   "reporting nl_preq=%p", bss->nl_preq);

        if (nl80211_register_frame(bss, bss->nl_preq,
                                   (WLAN_FC_TYPE_MGMT << 2) |
                                   (WLAN_FC_STYPE_PROBE_REQ << 4),
                                   NULL, 0) < 0)
                goto out_err;

        nl80211_register_eloop_read(&bss->nl_preq,
                                    wpa_driver_nl80211_event_receive,
                                    bss->nl_cb);

        return 0;

 out_err:
        nl_destroy_handles(&bss->nl_preq);
        return -1;
}


static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
                                     int ifindex, int disabled)
{
        struct nl_msg *msg;
        struct nlattr *bands, *band;
        int ret;

        wpa_printf(MSG_DEBUG,
                   "nl80211: NL80211_CMD_SET_TX_BITRATE_MASK (ifindex=%d %s)",
                   ifindex, disabled ? "NL80211_TXRATE_LEGACY=OFDM-only" :
                   "no NL80211_TXRATE_LEGACY constraint");

        msg = nl80211_ifindex_msg(drv, ifindex, 0,
                                  NL80211_CMD_SET_TX_BITRATE_MASK);
        if (!msg)
                return -1;

        bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
        if (!bands)
                goto fail;

        /*
         * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
         * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
         * rates. All 5 GHz rates are left enabled.
         */
        band = nla_nest_start(msg, NL80211_BAND_2GHZ);
        if (!band ||
            (disabled && nla_put(msg, NL80211_TXRATE_LEGACY, 8,
                                 "\x0c\x12\x18\x24\x30\x48\x60\x6c")))
                goto fail;
        nla_nest_end(msg, band);

        nla_nest_end(msg, bands);

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
                           "(%s)", ret, strerror(-ret));
        } else
                drv->disabled_11b_rates = disabled;

        return ret;

fail:
        nlmsg_free(msg);
        return -1;
}


static int wpa_driver_nl80211_deinit_ap(void *priv)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        if (!is_ap_interface(drv->nlmode))
                return -1;
        wpa_driver_nl80211_del_beacon(drv);
        bss->beacon_set = 0;

        /*
         * If the P2P GO interface was dynamically added, then it is
         * possible that the interface change to station is not possible.
         */
        if (drv->nlmode == NL80211_IFTYPE_P2P_GO && bss->if_dynamic)
                return 0;

        return wpa_driver_nl80211_set_mode(priv, NL80211_IFTYPE_STATION);
}


static int wpa_driver_nl80211_stop_ap(void *priv)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        if (!is_ap_interface(drv->nlmode))
                return -1;
        wpa_driver_nl80211_del_beacon(drv);
        bss->beacon_set = 0;
        return 0;
}


static int wpa_driver_nl80211_deinit_p2p_cli(void *priv)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        if (drv->nlmode != NL80211_IFTYPE_P2P_CLIENT)
                return -1;

        /*
         * If the P2P Client interface was dynamically added, then it is
         * possible that the interface change to station is not possible.
         */
        if (bss->if_dynamic)
                return 0;

        return wpa_driver_nl80211_set_mode(priv, NL80211_IFTYPE_STATION);
}


static void wpa_driver_nl80211_resume(void *priv)
{
        struct i802_bss *bss = priv;
        enum nl80211_iftype nlmode = nl80211_get_ifmode(bss);

        if (i802_set_iface_flags(bss, 1))
                wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on resume event");

        if (is_p2p_net_interface(nlmode))
                nl80211_disable_11b_rates(bss->drv, bss->drv->ifindex, 1);
}


static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        struct nlattr *cqm;

        wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
                   "hysteresis=%d", threshold, hysteresis);

        if (!(msg = nl80211_bss_msg(bss, 0, NL80211_CMD_SET_CQM)) ||
            !(cqm = nla_nest_start(msg, NL80211_ATTR_CQM)) ||
            nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_THOLD, threshold) ||
            nla_put_u32(msg, NL80211_ATTR_CQM_RSSI_HYST, hysteresis)) {
                nlmsg_free(msg);
                return -1;
        }
        nla_nest_end(msg, cqm);

        return send_and_recv_msgs(drv, msg, NULL, NULL);
}


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

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

        sig_change->center_frq1 = -1;
        sig_change->center_frq2 = -1;
        sig_change->chanwidth = CHAN_WIDTH_UNKNOWN;

        if (tb[NL80211_ATTR_CHANNEL_WIDTH]) {
                sig_change->chanwidth = convert2width(
                        nla_get_u32(tb[NL80211_ATTR_CHANNEL_WIDTH]));
                if (tb[NL80211_ATTR_CENTER_FREQ1])
                        sig_change->center_frq1 =
                                nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ1]);
                if (tb[NL80211_ATTR_CENTER_FREQ2])
                        sig_change->center_frq2 =
                                nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ2]);
        }

        return NL_SKIP;
}


static int nl80211_get_channel_width(struct wpa_driver_nl80211_data *drv,
                                     struct wpa_signal_info *sig)
{
        struct nl_msg *msg;

        msg = nl80211_drv_msg(drv, 0, NL80211_CMD_GET_INTERFACE);
        return send_and_recv_msgs(drv, msg, get_channel_width, sig);
}


static int nl80211_signal_poll(void *priv, struct wpa_signal_info *si)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        int res;

        os_memset(si, 0, sizeof(*si));
        res = nl80211_get_link_signal(drv, si);
        if (res) {
                if (drv->nlmode != NL80211_IFTYPE_ADHOC &&
                    drv->nlmode != NL80211_IFTYPE_MESH_POINT)
                        return res;
                si->current_signal = 0;
        }

        res = nl80211_get_channel_width(drv, si);
        if (res != 0)
                return res;

        return nl80211_get_link_noise(drv, si);
}


static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
                              int encrypt)
{
        struct i802_bss *bss = priv;
        return wpa_driver_nl80211_send_frame(bss, data, data_len, encrypt, 0,
                                             0, 0, 0, 0, NULL, 0);
}


static int nl80211_set_param(void *priv, const char *param)
{
        if (param == NULL)
                return 0;
        wpa_printf(MSG_DEBUG, "nl80211: driver param='%s'", param);

#ifdef CONFIG_P2P
        if (os_strstr(param, "use_p2p_group_interface=1")) {
                struct i802_bss *bss = priv;
                struct wpa_driver_nl80211_data *drv = bss->drv;

                wpa_printf(MSG_DEBUG, "nl80211: Use separate P2P group "
                           "interface");
                drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_CONCURRENT;
                drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_MGMT_AND_NON_P2P;
        }
#endif /* CONFIG_P2P */

        if (os_strstr(param, "use_monitor=1")) {
                struct i802_bss *bss = priv;
                struct wpa_driver_nl80211_data *drv = bss->drv;
                drv->use_monitor = 1;
        }

        if (os_strstr(param, "force_connect_cmd=1")) {
                struct i802_bss *bss = priv;
                struct wpa_driver_nl80211_data *drv = bss->drv;
                drv->capa.flags &= ~WPA_DRIVER_FLAGS_SME;
                drv->force_connect_cmd = 1;
        }

        if (os_strstr(param, "no_offchannel_tx=1")) {
                struct i802_bss *bss = priv;
                struct wpa_driver_nl80211_data *drv = bss->drv;
                drv->capa.flags &= ~WPA_DRIVER_FLAGS_OFFCHANNEL_TX;
                drv->test_use_roc_tx = 1;
        }

        return 0;
}


static void * nl80211_global_init(void *ctx)
{
        struct nl80211_global *global;
        struct netlink_config *cfg;

        global = os_zalloc(sizeof(*global));
        if (global == NULL)
                return NULL;
        global->ctx = ctx;
        global->ioctl_sock = -1;
        dl_list_init(&global->interfaces);
        global->if_add_ifindex = -1;

        cfg = os_zalloc(sizeof(*cfg));
        if (cfg == NULL)
                goto err;

        cfg->ctx = global;
        cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
        cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
        global->netlink = netlink_init(cfg);
        if (global->netlink == NULL) {
                os_free(cfg);
                goto err;
        }

        if (wpa_driver_nl80211_init_nl_global(global) < 0)
                goto err;

        global->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
        if (global->ioctl_sock < 0) {
                wpa_printf(MSG_ERROR, "nl80211: socket(PF_INET,SOCK_DGRAM) failed: %s",
                           strerror(errno));
                goto err;
        }

        return global;

err:
        nl80211_global_deinit(global);
        return NULL;
}


static void nl80211_global_deinit(void *priv)
{
        struct nl80211_global *global = priv;
        if (global == NULL)
                return;
        if (!dl_list_empty(&global->interfaces)) {
                wpa_printf(MSG_ERROR, "nl80211: %u interface(s) remain at "
                           "nl80211_global_deinit",
                           dl_list_len(&global->interfaces));
        }

        if (global->netlink)
                netlink_deinit(global->netlink);

        nl_destroy_handles(&global->nl);

        if (global->nl_event)
                nl80211_destroy_eloop_handle(&global->nl_event);

        nl_cb_put(global->nl_cb);

        if (global->ioctl_sock >= 0)
                close(global->ioctl_sock);

        os_free(global);
}


static const char * nl80211_get_radio_name(void *priv)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        return drv->phyname;
}


static int nl80211_pmkid(struct i802_bss *bss, int cmd, const u8 *bssid,
                         const u8 *pmkid)
{
        struct nl_msg *msg;

        if (!(msg = nl80211_bss_msg(bss, 0, cmd)) ||
            (pmkid && nla_put(msg, NL80211_ATTR_PMKID, 16, pmkid)) ||
            (bssid && nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, bssid))) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        return send_and_recv_msgs(bss->drv, msg, NULL, NULL);
}


static int nl80211_add_pmkid(void *priv, const u8 *bssid, const u8 *pmkid)
{
        struct i802_bss *bss = priv;
        wpa_printf(MSG_DEBUG, "nl80211: Add PMKID for " MACSTR, MAC2STR(bssid));
        return nl80211_pmkid(bss, NL80211_CMD_SET_PMKSA, bssid, pmkid);
}


static int nl80211_remove_pmkid(void *priv, const u8 *bssid, const u8 *pmkid)
{
        struct i802_bss *bss = priv;
        wpa_printf(MSG_DEBUG, "nl80211: Delete PMKID for " MACSTR,
                   MAC2STR(bssid));
        return nl80211_pmkid(bss, NL80211_CMD_DEL_PMKSA, bssid, pmkid);
}


static int nl80211_flush_pmkid(void *priv)
{
        struct i802_bss *bss = priv;
        wpa_printf(MSG_DEBUG, "nl80211: Flush PMKIDs");
        return nl80211_pmkid(bss, NL80211_CMD_FLUSH_PMKSA, NULL, NULL);
}


static void clean_survey_results(struct survey_results *survey_results)
{
        struct freq_survey *survey, *tmp;

        if (dl_list_empty(&survey_results->survey_list))
                return;

        dl_list_for_each_safe(survey, tmp, &survey_results->survey_list,
                              struct freq_survey, list) {
                dl_list_del(&survey->list);
                os_free(survey);
        }
}


static void add_survey(struct nlattr **sinfo, u32 ifidx,
                       struct dl_list *survey_list)
{
        struct freq_survey *survey;

        survey = os_zalloc(sizeof(struct freq_survey));
        if  (!survey)
                return;

        survey->ifidx = ifidx;
        survey->freq = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);
        survey->filled = 0;

        if (sinfo[NL80211_SURVEY_INFO_NOISE]) {
                survey->nf = (int8_t)
                        nla_get_u8(sinfo[NL80211_SURVEY_INFO_NOISE]);
                survey->filled |= SURVEY_HAS_NF;
        }

        if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME]) {
                survey->channel_time =
                        nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME]);
                survey->filled |= SURVEY_HAS_CHAN_TIME;
        }

        if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY]) {
                survey->channel_time_busy =
                        nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_BUSY]);
                survey->filled |= SURVEY_HAS_CHAN_TIME_BUSY;
        }

        if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_RX]) {
                survey->channel_time_rx =
                        nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_RX]);
                survey->filled |= SURVEY_HAS_CHAN_TIME_RX;
        }

        if (sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_TX]) {
                survey->channel_time_tx =
                        nla_get_u64(sinfo[NL80211_SURVEY_INFO_CHANNEL_TIME_TX]);
                survey->filled |= SURVEY_HAS_CHAN_TIME_TX;
        }

        wpa_printf(MSG_DEBUG, "nl80211: Freq survey dump event (freq=%d MHz noise=%d channel_time=%ld busy_time=%ld tx_time=%ld rx_time=%ld filled=%04x)",
                   survey->freq,
                   survey->nf,
                   (unsigned long int) survey->channel_time,
                   (unsigned long int) survey->channel_time_busy,
                   (unsigned long int) survey->channel_time_tx,
                   (unsigned long int) survey->channel_time_rx,
                   survey->filled);

        dl_list_add_tail(survey_list, &survey->list);
}


static int check_survey_ok(struct nlattr **sinfo, u32 surveyed_freq,
                           unsigned int freq_filter)
{
        if (!freq_filter)
                return 1;

        return freq_filter == surveyed_freq;
}


static int survey_handler(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];
        struct survey_results *survey_results;
        u32 surveyed_freq = 0;
        u32 ifidx;

        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 },
        };

        survey_results = (struct survey_results *) arg;

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

        if (!tb[NL80211_ATTR_IFINDEX])
                return NL_SKIP;

        ifidx = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);

        if (!tb[NL80211_ATTR_SURVEY_INFO])
                return NL_SKIP;

        if (nla_parse_nested(sinfo, NL80211_SURVEY_INFO_MAX,
                             tb[NL80211_ATTR_SURVEY_INFO],
                             survey_policy))
                return NL_SKIP;

        if (!sinfo[NL80211_SURVEY_INFO_FREQUENCY]) {
                wpa_printf(MSG_ERROR, "nl80211: Invalid survey data");
                return NL_SKIP;
        }

        surveyed_freq = nla_get_u32(sinfo[NL80211_SURVEY_INFO_FREQUENCY]);

        if (!check_survey_ok(sinfo, surveyed_freq,
                             survey_results->freq_filter))
                return NL_SKIP;

        if (survey_results->freq_filter &&
            survey_results->freq_filter != surveyed_freq) {
                wpa_printf(MSG_EXCESSIVE, "nl80211: Ignoring survey data for freq %d MHz",
                           surveyed_freq);
                return NL_SKIP;
        }

        add_survey(sinfo, ifidx, &survey_results->survey_list);

        return NL_SKIP;
}


static int wpa_driver_nl80211_get_survey(void *priv, unsigned int freq)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int err;
        union wpa_event_data data;
        struct survey_results *survey_results;

        os_memset(&data, 0, sizeof(data));
        survey_results = &data.survey_results;

        dl_list_init(&survey_results->survey_list);

        msg = nl80211_drv_msg(drv, NLM_F_DUMP, NL80211_CMD_GET_SURVEY);
        if (!msg)
                return -ENOBUFS;

        if (freq)
                data.survey_results.freq_filter = freq;

        do {
                wpa_printf(MSG_DEBUG, "nl80211: Fetch survey data");
                err = send_and_recv_msgs(drv, msg, survey_handler,
                                         survey_results);
        } while (err > 0);

        if (err)
                wpa_printf(MSG_ERROR, "nl80211: Failed to process survey data");
        else
                wpa_supplicant_event(drv->ctx, EVENT_SURVEY, &data);

        clean_survey_results(survey_results);
        return err;
}


static void nl80211_set_rekey_info(void *priv, const u8 *kek, size_t kek_len,
                                   const u8 *kck, size_t kck_len,
                                   const u8 *replay_ctr)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nlattr *replay_nested;
        struct nl_msg *msg;
        int ret;

        if (!drv->set_rekey_offload)
                return;

        wpa_printf(MSG_DEBUG, "nl80211: Set rekey offload");
        if (!(msg = nl80211_bss_msg(bss, 0, NL80211_CMD_SET_REKEY_OFFLOAD)) ||
            !(replay_nested = nla_nest_start(msg, NL80211_ATTR_REKEY_DATA)) ||
            nla_put(msg, NL80211_REKEY_DATA_KEK, kek_len, kek) ||
            nla_put(msg, NL80211_REKEY_DATA_KCK, kck_len, kck) ||
            nla_put(msg, NL80211_REKEY_DATA_REPLAY_CTR, NL80211_REPLAY_CTR_LEN,
                    replay_ctr)) {
                nl80211_nlmsg_clear(msg);
                nlmsg_free(msg);
                return;
        }

        nla_nest_end(msg, replay_nested);

        ret = send_and_recv_msgs(drv, msg, NULL, (void *) -1);
        if (ret == -EOPNOTSUPP) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Driver does not support rekey offload");
                drv->set_rekey_offload = 0;
        }
}


static void nl80211_send_null_frame(struct i802_bss *bss, const u8 *own_addr,
                                    const u8 *addr, int qos)
{
        /* send data frame to poll STA and check whether
         * this frame is ACKed */
        struct {
                struct ieee80211_hdr hdr;
                u16 qos_ctl;
        } STRUCT_PACKED nulldata;
        size_t size;

        /* Send data frame to poll STA and check whether this frame is ACKed */

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

        if (qos) {
                nulldata.hdr.frame_control =
                        IEEE80211_FC(WLAN_FC_TYPE_DATA,
                                     WLAN_FC_STYPE_QOS_NULL);
                size = sizeof(nulldata);
        } else {
                nulldata.hdr.frame_control =
                        IEEE80211_FC(WLAN_FC_TYPE_DATA,
                                     WLAN_FC_STYPE_NULLFUNC);
                size = sizeof(struct ieee80211_hdr);
        }

        nulldata.hdr.frame_control |= host_to_le16(WLAN_FC_FROMDS);
        os_memcpy(nulldata.hdr.IEEE80211_DA_FROMDS, addr, ETH_ALEN);
        os_memcpy(nulldata.hdr.IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
        os_memcpy(nulldata.hdr.IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);

        if (wpa_driver_nl80211_send_mlme(bss, (u8 *) &nulldata, size, 0, 0, 0,
                                         0, 0, NULL, 0) < 0)
                wpa_printf(MSG_DEBUG, "nl80211_send_null_frame: Failed to "
                           "send poll frame");
}

static void nl80211_poll_client(void *priv, const u8 *own_addr, const u8 *addr,
                                int qos)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;

        if (!drv->poll_command_supported) {
                nl80211_send_null_frame(bss, own_addr, addr, qos);
                return;
        }

        if (!(msg = nl80211_bss_msg(bss, 0, NL80211_CMD_PROBE_CLIENT)) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) {
                nlmsg_free(msg);
                return;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret < 0) {
                wpa_printf(MSG_DEBUG, "nl80211: Client probe request for "
                           MACSTR " failed: ret=%d (%s)",
                           MAC2STR(addr), ret, strerror(-ret));
        }
}


static int nl80211_set_power_save(struct i802_bss *bss, int enabled)
{
        struct nl_msg *msg;

        if (!(msg = nl80211_bss_msg(bss, 0, NL80211_CMD_SET_POWER_SAVE)) ||
            nla_put_u32(msg, NL80211_ATTR_PS_STATE,
                        enabled ? NL80211_PS_ENABLED : NL80211_PS_DISABLED)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }
        return send_and_recv_msgs(bss->drv, msg, NULL, NULL);
}


static int nl80211_set_p2p_powersave(void *priv, int legacy_ps, int opp_ps,
                                     int ctwindow)
{
        struct i802_bss *bss = priv;

        wpa_printf(MSG_DEBUG, "nl80211: set_p2p_powersave (legacy_ps=%d "
                   "opp_ps=%d ctwindow=%d)", legacy_ps, opp_ps, ctwindow);

        if (opp_ps != -1 || ctwindow != -1) {
#ifdef ANDROID_P2P
                wpa_driver_set_p2p_ps(priv, legacy_ps, opp_ps, ctwindow);
#else /* ANDROID_P2P */
                return -1; /* Not yet supported */
#endif /* ANDROID_P2P */
        }

        if (legacy_ps == -1)
                return 0;
        if (legacy_ps != 0 && legacy_ps != 1)
                return -1; /* Not yet supported */

        return nl80211_set_power_save(bss, legacy_ps);
}


static int nl80211_start_radar_detection(void *priv,
                                         struct hostapd_freq_params *freq)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;

        wpa_printf(MSG_DEBUG, "nl80211: Start radar detection (CAC) %d MHz (ht_enabled=%d, vht_enabled=%d, bandwidth=%d MHz, cf1=%d MHz, cf2=%d MHz)",
                   freq->freq, freq->ht_enabled, freq->vht_enabled,
                   freq->bandwidth, freq->center_freq1, freq->center_freq2);

        if (!(drv->capa.flags & WPA_DRIVER_FLAGS_RADAR)) {
                wpa_printf(MSG_DEBUG, "nl80211: Driver does not support radar "
                           "detection");
                return -1;
        }

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_RADAR_DETECT)) ||
            nl80211_put_freq_params(msg, freq) < 0) {
                nlmsg_free(msg);
                return -1;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret == 0)
                return 0;
        wpa_printf(MSG_DEBUG, "nl80211: Failed to start radar detection: "
                   "%d (%s)", ret, strerror(-ret));
        return -1;
}

#ifdef CONFIG_TDLS

static int nl80211_send_tdls_mgmt(void *priv, const u8 *dst, u8 action_code,
                                  u8 dialog_token, u16 status_code,
                                  u32 peer_capab, int initiator, const u8 *buf,
                                  size_t len)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;

        if (!(drv->capa.flags & WPA_DRIVER_FLAGS_TDLS_SUPPORT))
                return -EOPNOTSUPP;

        if (!dst)
                return -EINVAL;

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_TDLS_MGMT)) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, dst) ||
            nla_put_u8(msg, NL80211_ATTR_TDLS_ACTION, action_code) ||
            nla_put_u8(msg, NL80211_ATTR_TDLS_DIALOG_TOKEN, dialog_token) ||
            nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, status_code))
                goto fail;
        if (peer_capab) {
                /*
                 * The internal enum tdls_peer_capability definition is
                 * currently identical with the nl80211 enum
                 * nl80211_tdls_peer_capability, so no conversion is needed
                 * here.
                 */
                if (nla_put_u32(msg, NL80211_ATTR_TDLS_PEER_CAPABILITY,
                                peer_capab))
                        goto fail;
        }
        if ((initiator &&
             nla_put_flag(msg, NL80211_ATTR_TDLS_INITIATOR)) ||
            nla_put(msg, NL80211_ATTR_IE, len, buf))
                goto fail;

        return send_and_recv_msgs(drv, msg, NULL, NULL);

fail:
        nlmsg_free(msg);
        return -ENOBUFS;
}


static int nl80211_tdls_oper(void *priv, enum tdls_oper oper, const u8 *peer)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        enum nl80211_tdls_operation nl80211_oper;

        if (!(drv->capa.flags & WPA_DRIVER_FLAGS_TDLS_SUPPORT))
                return -EOPNOTSUPP;

        switch (oper) {
        case TDLS_DISCOVERY_REQ:
                nl80211_oper = NL80211_TDLS_DISCOVERY_REQ;
                break;
        case TDLS_SETUP:
                nl80211_oper = NL80211_TDLS_SETUP;
                break;
        case TDLS_TEARDOWN:
                nl80211_oper = NL80211_TDLS_TEARDOWN;
                break;
        case TDLS_ENABLE_LINK:
                nl80211_oper = NL80211_TDLS_ENABLE_LINK;
                break;
        case TDLS_DISABLE_LINK:
                nl80211_oper = NL80211_TDLS_DISABLE_LINK;
                break;
        case TDLS_ENABLE:
                return 0;
        case TDLS_DISABLE:
                return 0;
        default:
                return -EINVAL;
        }

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_TDLS_OPER)) ||
            nla_put_u8(msg, NL80211_ATTR_TDLS_OPERATION, nl80211_oper) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        return send_and_recv_msgs(drv, msg, NULL, NULL);
}


static int
nl80211_tdls_enable_channel_switch(void *priv, const u8 *addr, u8 oper_class,
                                   const struct hostapd_freq_params *params)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret = -ENOBUFS;

        if (!(drv->capa.flags & WPA_DRIVER_FLAGS_TDLS_SUPPORT) ||
            !(drv->capa.flags & WPA_DRIVER_FLAGS_TDLS_CHANNEL_SWITCH))
                return -EOPNOTSUPP;

        wpa_printf(MSG_DEBUG, "nl80211: Enable TDLS channel switch " MACSTR
                   " oper_class=%u freq=%u",
                   MAC2STR(addr), oper_class, params->freq);
        msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_TDLS_CHANNEL_SWITCH);
        if (!msg ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
            nla_put_u8(msg, NL80211_ATTR_OPER_CLASS, oper_class) ||
            (ret = nl80211_put_freq_params(msg, params))) {
                nlmsg_free(msg);
                wpa_printf(MSG_DEBUG, "nl80211: Could not build TDLS chan switch");
                return ret;
        }

        return send_and_recv_msgs(drv, msg, NULL, NULL);
}


static int
nl80211_tdls_disable_channel_switch(void *priv, const u8 *addr)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;

        if (!(drv->capa.flags & WPA_DRIVER_FLAGS_TDLS_SUPPORT) ||
            !(drv->capa.flags & WPA_DRIVER_FLAGS_TDLS_CHANNEL_SWITCH))
                return -EOPNOTSUPP;

        wpa_printf(MSG_DEBUG, "nl80211: Disable TDLS channel switch " MACSTR,
                   MAC2STR(addr));
        msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_TDLS_CANCEL_CHANNEL_SWITCH);
        if (!msg ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) {
                nlmsg_free(msg);
                wpa_printf(MSG_DEBUG,
                           "nl80211: Could not build TDLS cancel chan switch");
                return -ENOBUFS;
        }

        return send_and_recv_msgs(drv, msg, NULL, NULL);
}

#endif /* CONFIG TDLS */


static int driver_nl80211_set_key(const char *ifname, void *priv,
                                  enum wpa_alg alg, const u8 *addr,
                                  int key_idx, int set_tx,
                                  const u8 *seq, size_t seq_len,
                                  const u8 *key, size_t key_len)
{
        struct i802_bss *bss = priv;
        return wpa_driver_nl80211_set_key(ifname, bss, alg, addr, key_idx,
                                          set_tx, seq, seq_len, key, key_len);
}


static int driver_nl80211_scan2(void *priv,
                                struct wpa_driver_scan_params *params)
{
        struct i802_bss *bss = priv;
#ifdef CONFIG_DRIVER_NL80211_QCA
        struct wpa_driver_nl80211_data *drv = bss->drv;

        /*
         * Do a vendor specific scan if possible. If only_new_results is
         * set, do a normal scan since a kernel (cfg80211) BSS cache flush
         * cannot be achieved through a vendor scan. The below condition may
         * need to be modified if new scan flags are added in the future whose
         * functionality can only be achieved through a normal scan.
         */
        if (drv->scan_vendor_cmd_avail && !params->only_new_results)
                return wpa_driver_nl80211_vendor_scan(bss, params);
#endif /* CONFIG_DRIVER_NL80211_QCA */
        return wpa_driver_nl80211_scan(bss, params);
}


static int driver_nl80211_deauthenticate(void *priv, const u8 *addr,
                                         int reason_code)
{
        struct i802_bss *bss = priv;
        return wpa_driver_nl80211_deauthenticate(bss, addr, reason_code);
}


static int driver_nl80211_authenticate(void *priv,
                                       struct wpa_driver_auth_params *params)
{
        struct i802_bss *bss = priv;
        return wpa_driver_nl80211_authenticate(bss, params);
}


static void driver_nl80211_deinit(void *priv)
{
        struct i802_bss *bss = priv;
        wpa_driver_nl80211_deinit(bss);
}


static int driver_nl80211_if_remove(void *priv, enum wpa_driver_if_type type,
                                    const char *ifname)
{
        struct i802_bss *bss = priv;
        return wpa_driver_nl80211_if_remove(bss, type, ifname);
}


static int driver_nl80211_send_mlme(void *priv, const u8 *data,
                                    size_t data_len, int noack,
                                    unsigned int freq,
                                    const u16 *csa_offs, size_t csa_offs_len)
{
        struct i802_bss *bss = priv;
        return wpa_driver_nl80211_send_mlme(bss, data, data_len, noack,
                                            freq, 0, 0, 0, csa_offs,
                                            csa_offs_len);
}


static int driver_nl80211_sta_remove(void *priv, const u8 *addr)
{
        struct i802_bss *bss = priv;
        return wpa_driver_nl80211_sta_remove(bss, addr, -1, 0);
}


static int driver_nl80211_set_sta_vlan(void *priv, const u8 *addr,
                                       const char *ifname, int vlan_id)
{
        struct i802_bss *bss = priv;
        return i802_set_sta_vlan(bss, addr, ifname, vlan_id);
}


static int driver_nl80211_read_sta_data(void *priv,
                                        struct hostap_sta_driver_data *data,
                                        const u8 *addr)
{
        struct i802_bss *bss = priv;
        return i802_read_sta_data(bss, data, addr);
}


static int driver_nl80211_send_action(void *priv, unsigned int freq,
                                      unsigned int wait_time,
                                      const u8 *dst, const u8 *src,
                                      const u8 *bssid,
                                      const u8 *data, size_t data_len,
                                      int no_cck)
{
        struct i802_bss *bss = priv;
        return wpa_driver_nl80211_send_action(bss, freq, wait_time, dst, src,
                                              bssid, data, data_len, no_cck);
}


static int driver_nl80211_probe_req_report(void *priv, int report)
{
        struct i802_bss *bss = priv;
        return wpa_driver_nl80211_probe_req_report(bss, report);
}


static int wpa_driver_nl80211_update_ft_ies(void *priv, const u8 *md,
                                            const u8 *ies, size_t ies_len)
{
        int ret;
        struct nl_msg *msg;
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        u16 mdid = WPA_GET_LE16(md);

        wpa_printf(MSG_DEBUG, "nl80211: Updating FT IEs");
        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_UPDATE_FT_IES)) ||
            nla_put(msg, NL80211_ATTR_IE, ies_len, ies) ||
            nla_put_u16(msg, NL80211_ATTR_MDID, mdid)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: update_ft_ies failed "
                           "err=%d (%s)", ret, strerror(-ret));
        }

        return ret;
}


const u8 * wpa_driver_nl80211_get_macaddr(void *priv)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;

        if (drv->nlmode != NL80211_IFTYPE_P2P_DEVICE)
                return NULL;

        return bss->addr;
}


static const char * scan_state_str(enum scan_states scan_state)
{
        switch (scan_state) {
        case NO_SCAN:
                return "NO_SCAN";
        case SCAN_REQUESTED:
                return "SCAN_REQUESTED";
        case SCAN_STARTED:
                return "SCAN_STARTED";
        case SCAN_COMPLETED:
                return "SCAN_COMPLETED";
        case SCAN_ABORTED:
                return "SCAN_ABORTED";
        case SCHED_SCAN_STARTED:
                return "SCHED_SCAN_STARTED";
        case SCHED_SCAN_STOPPED:
                return "SCHED_SCAN_STOPPED";
        case SCHED_SCAN_RESULTS:
                return "SCHED_SCAN_RESULTS";
        }

        return "??";
}


static int wpa_driver_nl80211_status(void *priv, char *buf, size_t buflen)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        int res;
        char *pos, *end;

        pos = buf;
        end = buf + buflen;

        res = os_snprintf(pos, end - pos,
                          "ifindex=%d\n"
                          "ifname=%s\n"
                          "brname=%s\n"
                          "addr=" MACSTR "\n"
                          "freq=%d\n"
                          "%s%s%s%s%s",
                          bss->ifindex,
                          bss->ifname,
                          bss->brname,
                          MAC2STR(bss->addr),
                          bss->freq,
                          bss->beacon_set ? "beacon_set=1\n" : "",
                          bss->added_if_into_bridge ?
                          "added_if_into_bridge=1\n" : "",
                          bss->added_bridge ? "added_bridge=1\n" : "",
                          bss->in_deinit ? "in_deinit=1\n" : "",
                          bss->if_dynamic ? "if_dynamic=1\n" : "");
        if (os_snprintf_error(end - pos, res))
                return pos - buf;
        pos += res;

        if (bss->wdev_id_set) {
                res = os_snprintf(pos, end - pos, "wdev_id=%llu\n",
                                  (unsigned long long) bss->wdev_id);
                if (os_snprintf_error(end - pos, res))
                        return pos - buf;
                pos += res;
        }

        res = os_snprintf(pos, end - pos,
                          "phyname=%s\n"
                          "perm_addr=" MACSTR "\n"
                          "drv_ifindex=%d\n"
                          "operstate=%d\n"
                          "scan_state=%s\n"
                          "auth_bssid=" MACSTR "\n"
                          "auth_attempt_bssid=" MACSTR "\n"
                          "bssid=" MACSTR "\n"
                          "prev_bssid=" MACSTR "\n"
                          "associated=%d\n"
                          "assoc_freq=%u\n"
                          "monitor_sock=%d\n"
                          "monitor_ifidx=%d\n"
                          "monitor_refcount=%d\n"
                          "last_mgmt_freq=%u\n"
                          "eapol_tx_sock=%d\n"
                          "%s%s%s%s%s%s%s%s%s%s%s%s%s",
                          drv->phyname,
                          MAC2STR(drv->perm_addr),
                          drv->ifindex,
                          drv->operstate,
                          scan_state_str(drv->scan_state),
                          MAC2STR(drv->auth_bssid),
                          MAC2STR(drv->auth_attempt_bssid),
                          MAC2STR(drv->bssid),
                          MAC2STR(drv->prev_bssid),
                          drv->associated,
                          drv->assoc_freq,
                          drv->monitor_sock,
                          drv->monitor_ifidx,
                          drv->monitor_refcount,
                          drv->last_mgmt_freq,
                          drv->eapol_tx_sock,
                          drv->ignore_if_down_event ?
                          "ignore_if_down_event=1\n" : "",
                          drv->scan_complete_events ?
                          "scan_complete_events=1\n" : "",
                          drv->disabled_11b_rates ?
                          "disabled_11b_rates=1\n" : "",
                          drv->pending_remain_on_chan ?
                          "pending_remain_on_chan=1\n" : "",
                          drv->in_interface_list ? "in_interface_list=1\n" : "",
                          drv->device_ap_sme ? "device_ap_sme=1\n" : "",
                          drv->poll_command_supported ?
                          "poll_command_supported=1\n" : "",
                          drv->data_tx_status ? "data_tx_status=1\n" : "",
                          drv->scan_for_auth ? "scan_for_auth=1\n" : "",
                          drv->retry_auth ? "retry_auth=1\n" : "",
                          drv->use_monitor ? "use_monitor=1\n" : "",
                          drv->ignore_next_local_disconnect ?
                          "ignore_next_local_disconnect=1\n" : "",
                          drv->ignore_next_local_deauth ?
                          "ignore_next_local_deauth=1\n" : "");
        if (os_snprintf_error(end - pos, res))
                return pos - buf;
        pos += res;

        if (drv->has_capability) {
                res = os_snprintf(pos, end - pos,
                                  "capa.key_mgmt=0x%x\n"
                                  "capa.enc=0x%x\n"
                                  "capa.auth=0x%x\n"
                                  "capa.flags=0x%llx\n"
                                  "capa.rrm_flags=0x%x\n"
                                  "capa.max_scan_ssids=%d\n"
                                  "capa.max_sched_scan_ssids=%d\n"
                                  "capa.sched_scan_supported=%d\n"
                                  "capa.max_match_sets=%d\n"
                                  "capa.max_remain_on_chan=%u\n"
                                  "capa.max_stations=%u\n"
                                  "capa.probe_resp_offloads=0x%x\n"
                                  "capa.max_acl_mac_addrs=%u\n"
                                  "capa.num_multichan_concurrent=%u\n"
                                  "capa.mac_addr_rand_sched_scan_supported=%d\n"
                                  "capa.mac_addr_rand_scan_supported=%d\n"
                                  "capa.conc_capab=%u\n"
                                  "capa.max_conc_chan_2_4=%u\n"
                                  "capa.max_conc_chan_5_0=%u\n"
                                  "capa.max_sched_scan_plans=%u\n"
                                  "capa.max_sched_scan_plan_interval=%u\n"
                                  "capa.max_sched_scan_plan_iterations=%u\n",
                                  drv->capa.key_mgmt,
                                  drv->capa.enc,
                                  drv->capa.auth,
                                  (unsigned long long) drv->capa.flags,
                                  drv->capa.rrm_flags,
                                  drv->capa.max_scan_ssids,
                                  drv->capa.max_sched_scan_ssids,
                                  drv->capa.sched_scan_supported,
                                  drv->capa.max_match_sets,
                                  drv->capa.max_remain_on_chan,
                                  drv->capa.max_stations,
                                  drv->capa.probe_resp_offloads,
                                  drv->capa.max_acl_mac_addrs,
                                  drv->capa.num_multichan_concurrent,
                                  drv->capa.mac_addr_rand_sched_scan_supported,
                                  drv->capa.mac_addr_rand_scan_supported,
                                  drv->capa.conc_capab,
                                  drv->capa.max_conc_chan_2_4,
                                  drv->capa.max_conc_chan_5_0,
                                  drv->capa.max_sched_scan_plans,
                                  drv->capa.max_sched_scan_plan_interval,
                                  drv->capa.max_sched_scan_plan_iterations);
                if (os_snprintf_error(end - pos, res))
                        return pos - buf;
                pos += res;
        }

        return pos - buf;
}


static int set_beacon_data(struct nl_msg *msg, struct beacon_data *settings)
{
        if ((settings->head &&
             nla_put(msg, NL80211_ATTR_BEACON_HEAD,
                     settings->head_len, settings->head)) ||
            (settings->tail &&
             nla_put(msg, NL80211_ATTR_BEACON_TAIL,
                     settings->tail_len, settings->tail)) ||
            (settings->beacon_ies &&
             nla_put(msg, NL80211_ATTR_IE,
                     settings->beacon_ies_len, settings->beacon_ies)) ||
            (settings->proberesp_ies &&
             nla_put(msg, NL80211_ATTR_IE_PROBE_RESP,
                     settings->proberesp_ies_len, settings->proberesp_ies)) ||
            (settings->assocresp_ies &&
             nla_put(msg, NL80211_ATTR_IE_ASSOC_RESP,
                     settings->assocresp_ies_len, settings->assocresp_ies)) ||
            (settings->probe_resp &&
             nla_put(msg, NL80211_ATTR_PROBE_RESP,
                     settings->probe_resp_len, settings->probe_resp)))
                return -ENOBUFS;

        return 0;
}


static int nl80211_switch_channel(void *priv, struct csa_settings *settings)
{
        struct nl_msg *msg;
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nlattr *beacon_csa;
        int ret = -ENOBUFS;
        int csa_off_len = 0;
        int i;

        wpa_printf(MSG_DEBUG, "nl80211: Channel switch request (cs_count=%u block_tx=%u freq=%d width=%d cf1=%d cf2=%d)",
                   settings->cs_count, settings->block_tx,
                   settings->freq_params.freq, settings->freq_params.bandwidth,
                   settings->freq_params.center_freq1,
                   settings->freq_params.center_freq2);

        if (!(drv->capa.flags & WPA_DRIVER_FLAGS_AP_CSA)) {
                wpa_printf(MSG_DEBUG, "nl80211: Driver does not support channel switch command");
                return -EOPNOTSUPP;
        }

        if ((drv->nlmode != NL80211_IFTYPE_AP) &&
            (drv->nlmode != NL80211_IFTYPE_P2P_GO))
                return -EOPNOTSUPP;

        /*
         * Remove empty counters, assuming Probe Response and Beacon frame
         * counters match. This implementation assumes that there are only two
         * counters.
         */
        if (settings->counter_offset_beacon[0] &&
            !settings->counter_offset_beacon[1]) {
                csa_off_len = 1;
        } else if (settings->counter_offset_beacon[1] &&
                   !settings->counter_offset_beacon[0]) {
                csa_off_len = 1;
                settings->counter_offset_beacon[0] =
                        settings->counter_offset_beacon[1];
                settings->counter_offset_presp[0] =
                        settings->counter_offset_presp[1];
        } else if (settings->counter_offset_beacon[1] &&
                   settings->counter_offset_beacon[0]) {
                csa_off_len = 2;
        } else {
                wpa_printf(MSG_ERROR, "nl80211: No CSA counters provided");
                return -EINVAL;
        }

        /* Check CSA counters validity */
        if (drv->capa.max_csa_counters &&
            csa_off_len > drv->capa.max_csa_counters) {
                wpa_printf(MSG_ERROR,
                           "nl80211: Too many CSA counters provided");
                return -EINVAL;
        }

        if (!settings->beacon_csa.tail)
                return -EINVAL;

        for (i = 0; i < csa_off_len; i++) {
                u16 csa_c_off_bcn = settings->counter_offset_beacon[i];
                u16 csa_c_off_presp = settings->counter_offset_presp[i];

                if ((settings->beacon_csa.tail_len <= csa_c_off_bcn) ||
                    (settings->beacon_csa.tail[csa_c_off_bcn] !=
                     settings->cs_count))
                        return -EINVAL;

                if (settings->beacon_csa.probe_resp &&
                    ((settings->beacon_csa.probe_resp_len <=
                      csa_c_off_presp) ||
                     (settings->beacon_csa.probe_resp[csa_c_off_presp] !=
                      settings->cs_count)))
                        return -EINVAL;
        }

        if (!(msg = nl80211_bss_msg(bss, 0, NL80211_CMD_CHANNEL_SWITCH)) ||
            nla_put_u32(msg, NL80211_ATTR_CH_SWITCH_COUNT,
                        settings->cs_count) ||
            (ret = nl80211_put_freq_params(msg, &settings->freq_params)) ||
            (settings->block_tx &&
             nla_put_flag(msg, NL80211_ATTR_CH_SWITCH_BLOCK_TX)))
                goto error;

        /* beacon_after params */
        ret = set_beacon_data(msg, &settings->beacon_after);
        if (ret)
                goto error;

        /* beacon_csa params */
        beacon_csa = nla_nest_start(msg, NL80211_ATTR_CSA_IES);
        if (!beacon_csa)
                goto fail;

        ret = set_beacon_data(msg, &settings->beacon_csa);
        if (ret)
                goto error;

        if (nla_put(msg, NL80211_ATTR_CSA_C_OFF_BEACON,
                    csa_off_len * sizeof(u16),
                    settings->counter_offset_beacon) ||
            (settings->beacon_csa.probe_resp &&
             nla_put(msg, NL80211_ATTR_CSA_C_OFF_PRESP,
                     csa_off_len * sizeof(u16),
                     settings->counter_offset_presp)))
                goto fail;

        nla_nest_end(msg, beacon_csa);
        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: switch_channel failed err=%d (%s)",
                           ret, strerror(-ret));
        }
        return ret;

fail:
        ret = -ENOBUFS;
error:
        nlmsg_free(msg);
        wpa_printf(MSG_DEBUG, "nl80211: Could not build channel switch request");
        return ret;
}


static int nl80211_add_ts(void *priv, u8 tsid, const u8 *addr,
                          u8 user_priority, u16 admitted_time)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;

        wpa_printf(MSG_DEBUG,
                   "nl80211: add_ts request: tsid=%u admitted_time=%u up=%d",
                   tsid, admitted_time, user_priority);

        if (!is_sta_interface(drv->nlmode))
                return -ENOTSUP;

        msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_ADD_TX_TS);
        if (!msg ||
            nla_put_u8(msg, NL80211_ATTR_TSID, tsid) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
            nla_put_u8(msg, NL80211_ATTR_USER_PRIO, user_priority) ||
            nla_put_u16(msg, NL80211_ATTR_ADMITTED_TIME, admitted_time)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret)
                wpa_printf(MSG_DEBUG, "nl80211: add_ts failed err=%d (%s)",
                           ret, strerror(-ret));
        return ret;
}


static int nl80211_del_ts(void *priv, u8 tsid, const u8 *addr)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;

        wpa_printf(MSG_DEBUG, "nl80211: del_ts request: tsid=%u", tsid);

        if (!is_sta_interface(drv->nlmode))
                return -ENOTSUP;

        if (!(msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_DEL_TX_TS)) ||
            nla_put_u8(msg, NL80211_ATTR_TSID, tsid) ||
            nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret)
                wpa_printf(MSG_DEBUG, "nl80211: del_ts failed err=%d (%s)",
                           ret, strerror(-ret));
        return ret;
}


#ifdef CONFIG_TESTING_OPTIONS
static int cmd_reply_handler(struct nl_msg *msg, void *arg)
{
        struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
        struct wpabuf *buf = arg;

        if (!buf)
                return NL_SKIP;

        if ((size_t) genlmsg_attrlen(gnlh, 0) > wpabuf_tailroom(buf)) {
                wpa_printf(MSG_INFO, "nl80211: insufficient buffer space for reply");
                return NL_SKIP;
        }

        wpabuf_put_data(buf, genlmsg_attrdata(gnlh, 0),
                        genlmsg_attrlen(gnlh, 0));

        return NL_SKIP;
}
#endif /* CONFIG_TESTING_OPTIONS */


static int vendor_reply_handler(struct nl_msg *msg, void *arg)
{
        struct nlattr *tb[NL80211_ATTR_MAX + 1];
        struct nlattr *nl_vendor_reply, *nl;
        struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
        struct wpabuf *buf = arg;
        int rem;

        if (!buf)
                return NL_SKIP;

        nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
                  genlmsg_attrlen(gnlh, 0), NULL);
        nl_vendor_reply = tb[NL80211_ATTR_VENDOR_DATA];

        if (!nl_vendor_reply)
                return NL_SKIP;

        if ((size_t) nla_len(nl_vendor_reply) > wpabuf_tailroom(buf)) {
                wpa_printf(MSG_INFO, "nl80211: Vendor command: insufficient buffer space for reply");
                return NL_SKIP;
        }

        nla_for_each_nested(nl, nl_vendor_reply, rem) {
                wpabuf_put_data(buf, nla_data(nl), nla_len(nl));
        }

        return NL_SKIP;
}


static int nl80211_vendor_cmd(void *priv, unsigned int vendor_id,
                              unsigned int subcmd, const u8 *data,
                              size_t data_len, struct wpabuf *buf)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;

#ifdef CONFIG_TESTING_OPTIONS
        if (vendor_id == 0xffffffff) {
                msg = nlmsg_alloc();
                if (!msg)
                        return -ENOMEM;

                nl80211_cmd(drv, msg, 0, subcmd);
                if (nlmsg_append(msg, (void *) data, data_len, NLMSG_ALIGNTO) <
                    0)
                        goto fail;
                ret = send_and_recv_msgs(drv, msg, cmd_reply_handler, buf);
                if (ret)
                        wpa_printf(MSG_DEBUG, "nl80211: command failed err=%d",
                                   ret);
                return ret;
        }
#endif /* CONFIG_TESTING_OPTIONS */

        if (!(msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_VENDOR)) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, vendor_id) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD, subcmd) ||
            (data &&
             nla_put(msg, NL80211_ATTR_VENDOR_DATA, data_len, data)))
                goto fail;

        ret = send_and_recv_msgs(drv, msg, vendor_reply_handler, buf);
        if (ret)
                wpa_printf(MSG_DEBUG, "nl80211: vendor command failed err=%d",
                           ret);
        return ret;

fail:
        nlmsg_free(msg);
        return -ENOBUFS;
}


static int nl80211_set_qos_map(void *priv, const u8 *qos_map_set,
                               u8 qos_map_set_len)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;

        wpa_hexdump(MSG_DEBUG, "nl80211: Setting QoS Map",
                    qos_map_set, qos_map_set_len);

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_SET_QOS_MAP)) ||
            nla_put(msg, NL80211_ATTR_QOS_MAP, qos_map_set_len, qos_map_set)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret)
                wpa_printf(MSG_DEBUG, "nl80211: Setting QoS Map failed");

        return ret;
}


static int nl80211_set_wowlan(void *priv,
                              const struct wowlan_triggers *triggers)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        struct nlattr *wowlan_triggers;
        int ret;

        wpa_printf(MSG_DEBUG, "nl80211: Setting wowlan");

        if (!(msg = nl80211_cmd_msg(bss, 0, NL80211_CMD_SET_WOWLAN)) ||
            !(wowlan_triggers = nla_nest_start(msg,
                                               NL80211_ATTR_WOWLAN_TRIGGERS)) ||
            (triggers->any &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_ANY)) ||
            (triggers->disconnect &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_DISCONNECT)) ||
            (triggers->magic_pkt &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_MAGIC_PKT)) ||
            (triggers->gtk_rekey_failure &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_GTK_REKEY_FAILURE)) ||
            (triggers->eap_identity_req &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_EAP_IDENT_REQUEST)) ||
            (triggers->four_way_handshake &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_4WAY_HANDSHAKE)) ||
            (triggers->rfkill_release &&
             nla_put_flag(msg, NL80211_WOWLAN_TRIG_RFKILL_RELEASE))) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }

        nla_nest_end(msg, wowlan_triggers);

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret)
                wpa_printf(MSG_DEBUG, "nl80211: Setting wowlan failed");

        return ret;
}


#ifdef CONFIG_DRIVER_NL80211_QCA
static int nl80211_roaming(void *priv, int allowed, const u8 *bssid)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        struct nlattr *params;

        wpa_printf(MSG_DEBUG, "nl80211: Roaming policy: allowed=%d", allowed);

        if (!drv->roaming_vendor_cmd_avail) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Ignore roaming policy change since driver does not provide command for setting it");
                return -1;
        }

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_VENDOR)) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, OUI_QCA) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD,
                        QCA_NL80211_VENDOR_SUBCMD_ROAMING) ||
            !(params = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA)) ||
            nla_put_u32(msg, QCA_WLAN_VENDOR_ATTR_ROAMING_POLICY,
                        allowed ? QCA_ROAMING_ALLOWED_WITHIN_ESS :
                        QCA_ROAMING_NOT_ALLOWED) ||
            (bssid &&
             nla_put(msg, QCA_WLAN_VENDOR_ATTR_MAC_ADDR, ETH_ALEN, bssid))) {
                nlmsg_free(msg);
                return -1;
        }
        nla_nest_end(msg, params);

        return send_and_recv_msgs(drv, msg, NULL, NULL);
}
#endif /* CONFIG_DRIVER_NL80211_QCA */


static int nl80211_set_mac_addr(void *priv, const u8 *addr)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        int new_addr = addr != NULL;

        if (!addr)
                addr = drv->perm_addr;

        if (linux_set_iface_flags(drv->global->ioctl_sock, bss->ifname, 0) < 0)
                return -1;

        if (linux_set_ifhwaddr(drv->global->ioctl_sock, bss->ifname, addr) < 0)
        {
                wpa_printf(MSG_DEBUG,
                           "nl80211: failed to set_mac_addr for %s to " MACSTR,
                           bss->ifname, MAC2STR(addr));
                if (linux_set_iface_flags(drv->global->ioctl_sock, bss->ifname,
                                          1) < 0) {
                        wpa_printf(MSG_DEBUG,
                                   "nl80211: Could not restore interface UP after failed set_mac_addr");
                }
                return -1;
        }

        wpa_printf(MSG_DEBUG, "nl80211: set_mac_addr for %s to " MACSTR,
                   bss->ifname, MAC2STR(addr));
        drv->addr_changed = new_addr;
        os_memcpy(bss->addr, addr, ETH_ALEN);

        if (linux_set_iface_flags(drv->global->ioctl_sock, bss->ifname, 1) < 0)
        {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Could not restore interface UP after set_mac_addr");
        }

        return 0;
}


#ifdef CONFIG_MESH

static int wpa_driver_nl80211_init_mesh(void *priv)
{
        if (wpa_driver_nl80211_set_mode(priv, NL80211_IFTYPE_MESH_POINT)) {
                wpa_printf(MSG_INFO,
                           "nl80211: Failed to set interface into mesh mode");
                return -1;
        }
        return 0;
}


static int nl80211_put_mesh_id(struct nl_msg *msg, const u8 *mesh_id,
                               size_t mesh_id_len)
{
        if (mesh_id) {
                wpa_hexdump_ascii(MSG_DEBUG, "  * Mesh ID (SSID)",
                                  mesh_id, mesh_id_len);
                return nla_put(msg, NL80211_ATTR_MESH_ID, mesh_id_len, mesh_id);
        }

        return 0;
}


static int nl80211_join_mesh(struct i802_bss *bss,
                             struct wpa_driver_mesh_join_params *params)
{
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        struct nlattr *container;
        int ret = -1;

        wpa_printf(MSG_DEBUG, "nl80211: mesh join (ifindex=%d)", drv->ifindex);
        msg = nl80211_drv_msg(drv, 0, NL80211_CMD_JOIN_MESH);
        if (!msg ||
            nl80211_put_freq_params(msg, &params->freq) ||
            nl80211_put_basic_rates(msg, params->basic_rates) ||
            nl80211_put_mesh_id(msg, params->meshid, params->meshid_len) ||
            nl80211_put_beacon_int(msg, params->beacon_int))
                goto fail;

        wpa_printf(MSG_DEBUG, "  * flags=%08X", params->flags);

        container = nla_nest_start(msg, NL80211_ATTR_MESH_SETUP);
        if (!container)
                goto fail;

        if (params->ies) {
                wpa_hexdump(MSG_DEBUG, "  * IEs", params->ies, params->ie_len);
                if (nla_put(msg, NL80211_MESH_SETUP_IE, params->ie_len,
                            params->ies))
                        goto fail;
        }
        /* WPA_DRIVER_MESH_FLAG_OPEN_AUTH is treated as default by nl80211 */
        if (params->flags & WPA_DRIVER_MESH_FLAG_SAE_AUTH) {
                if (nla_put_u8(msg, NL80211_MESH_SETUP_AUTH_PROTOCOL, 0x1) ||
                    nla_put_flag(msg, NL80211_MESH_SETUP_USERSPACE_AUTH))
                        goto fail;
        }
        if ((params->flags & WPA_DRIVER_MESH_FLAG_AMPE) &&
            nla_put_flag(msg, NL80211_MESH_SETUP_USERSPACE_AMPE))
                goto fail;
        if ((params->flags & WPA_DRIVER_MESH_FLAG_USER_MPM) &&
            nla_put_flag(msg, NL80211_MESH_SETUP_USERSPACE_MPM))
                goto fail;
        nla_nest_end(msg, container);

        container = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
        if (!container)
                goto fail;

        if (!(params->conf.flags & WPA_DRIVER_MESH_CONF_FLAG_AUTO_PLINKS) &&
            nla_put_u32(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS, 0))
                goto fail;
        if ((params->conf.flags & WPA_DRIVER_MESH_FLAG_DRIVER_MPM) &&
            nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
                        params->max_peer_links))
                goto fail;

        /*
         * Set NL80211_MESHCONF_PLINK_TIMEOUT even if user mpm is used because
         * the timer could disconnect stations even in that case.
         */
        if (nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
                        params->conf.peer_link_timeout)) {
                wpa_printf(MSG_ERROR, "nl80211: Failed to set PLINK_TIMEOUT");
                goto fail;
        }

        nla_nest_end(msg, container);

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        msg = NULL;
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: mesh join failed: ret=%d (%s)",
                           ret, strerror(-ret));
                goto fail;
        }
        ret = 0;
        bss->freq = params->freq.freq;
        wpa_printf(MSG_DEBUG, "nl80211: mesh join request send successfully");

fail:
        nlmsg_free(msg);
        return ret;
}


static int
wpa_driver_nl80211_join_mesh(void *priv,
                             struct wpa_driver_mesh_join_params *params)
{
        struct i802_bss *bss = priv;
        int ret, timeout;

        timeout = params->conf.peer_link_timeout;

        /* Disable kernel inactivity timer */
        if (params->flags & WPA_DRIVER_MESH_FLAG_USER_MPM)
                params->conf.peer_link_timeout = 0;

        ret = nl80211_join_mesh(bss, params);
        if (ret == -EINVAL && params->conf.peer_link_timeout == 0) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Mesh join retry for peer_link_timeout");
                /*
                 * Old kernel does not support setting
                 * NL80211_MESHCONF_PLINK_TIMEOUT to zero, so set 60 seconds
                 * into future from peer_link_timeout.
                 */
                params->conf.peer_link_timeout = timeout + 60;
                ret = nl80211_join_mesh(priv, params);
        }

        params->conf.peer_link_timeout = timeout;
        return ret;
}


static int wpa_driver_nl80211_leave_mesh(void *priv)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;

        wpa_printf(MSG_DEBUG, "nl80211: mesh leave (ifindex=%d)", drv->ifindex);
        msg = nl80211_drv_msg(drv, 0, NL80211_CMD_LEAVE_MESH);
        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret) {
                wpa_printf(MSG_DEBUG, "nl80211: mesh leave failed: ret=%d (%s)",
                           ret, strerror(-ret));
        } else {
                wpa_printf(MSG_DEBUG,
                           "nl80211: mesh leave request send successfully");
        }

        if (wpa_driver_nl80211_set_mode(drv->first_bss,
                                        NL80211_IFTYPE_STATION)) {
                wpa_printf(MSG_INFO,
                           "nl80211: Failed to set interface into station mode");
        }
        return ret;
}

#endif /* CONFIG_MESH */


static int wpa_driver_br_add_ip_neigh(void *priv, u8 version,
                                      const u8 *ipaddr, int prefixlen,
                                      const u8 *addr)
{
#ifdef CONFIG_LIBNL3_ROUTE
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct rtnl_neigh *rn;
        struct nl_addr *nl_ipaddr = NULL;
        struct nl_addr *nl_lladdr = NULL;
        int family, addrsize;
        int res;

        if (!ipaddr || prefixlen == 0 || !addr)
                return -EINVAL;

        if (bss->br_ifindex == 0) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: bridge must be set before adding an ip neigh to it");
                return -1;
        }

        if (!drv->rtnl_sk) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: nl_sock for NETLINK_ROUTE is not initialized");
                return -1;
        }

        if (version == 4) {
                family = AF_INET;
                addrsize = 4;
        } else if (version == 6) {
                family = AF_INET6;
                addrsize = 16;
        } else {
                return -EINVAL;
        }

        rn = rtnl_neigh_alloc();
        if (rn == NULL)
                return -ENOMEM;

        /* set the destination ip address for neigh */
        nl_ipaddr = nl_addr_build(family, (void *) ipaddr, addrsize);
        if (nl_ipaddr == NULL) {
                wpa_printf(MSG_DEBUG, "nl80211: nl_ipaddr build failed");
                res = -ENOMEM;
                goto errout;
        }
        nl_addr_set_prefixlen(nl_ipaddr, prefixlen);
        res = rtnl_neigh_set_dst(rn, nl_ipaddr);
        if (res) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: neigh set destination addr failed");
                goto errout;
        }

        /* set the corresponding lladdr for neigh */
        nl_lladdr = nl_addr_build(AF_BRIDGE, (u8 *) addr, ETH_ALEN);
        if (nl_lladdr == NULL) {
                wpa_printf(MSG_DEBUG, "nl80211: neigh set lladdr failed");
                res = -ENOMEM;
                goto errout;
        }
        rtnl_neigh_set_lladdr(rn, nl_lladdr);

        rtnl_neigh_set_ifindex(rn, bss->br_ifindex);
        rtnl_neigh_set_state(rn, NUD_PERMANENT);

        res = rtnl_neigh_add(drv->rtnl_sk, rn, NLM_F_CREATE);
        if (res) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Adding bridge ip neigh failed: %s",
                           strerror(errno));
        }
errout:
        if (nl_lladdr)
                nl_addr_put(nl_lladdr);
        if (nl_ipaddr)
                nl_addr_put(nl_ipaddr);
        if (rn)
                rtnl_neigh_put(rn);
        return res;
#else /* CONFIG_LIBNL3_ROUTE */
        return -1;
#endif /* CONFIG_LIBNL3_ROUTE */
}


static int wpa_driver_br_delete_ip_neigh(void *priv, u8 version,
                                         const u8 *ipaddr)
{
#ifdef CONFIG_LIBNL3_ROUTE
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct rtnl_neigh *rn;
        struct nl_addr *nl_ipaddr;
        int family, addrsize;
        int res;

        if (!ipaddr)
                return -EINVAL;

        if (version == 4) {
                family = AF_INET;
                addrsize = 4;
        } else if (version == 6) {
                family = AF_INET6;
                addrsize = 16;
        } else {
                return -EINVAL;
        }

        if (bss->br_ifindex == 0) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: bridge must be set to delete an ip neigh");
                return -1;
        }

        if (!drv->rtnl_sk) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: nl_sock for NETLINK_ROUTE is not initialized");
                return -1;
        }

        rn = rtnl_neigh_alloc();
        if (rn == NULL)
                return -ENOMEM;

        /* set the destination ip address for neigh */
        nl_ipaddr = nl_addr_build(family, (void *) ipaddr, addrsize);
        if (nl_ipaddr == NULL) {
                wpa_printf(MSG_DEBUG, "nl80211: nl_ipaddr build failed");
                res = -ENOMEM;
                goto errout;
        }
        res = rtnl_neigh_set_dst(rn, nl_ipaddr);
        if (res) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: neigh set destination addr failed");
                goto errout;
        }

        rtnl_neigh_set_ifindex(rn, bss->br_ifindex);

        res = rtnl_neigh_delete(drv->rtnl_sk, rn, 0);
        if (res) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Deleting bridge ip neigh failed: %s",
                           strerror(errno));
        }
errout:
        if (nl_ipaddr)
                nl_addr_put(nl_ipaddr);
        if (rn)
                rtnl_neigh_put(rn);
        return res;
#else /* CONFIG_LIBNL3_ROUTE */
        return -1;
#endif /* CONFIG_LIBNL3_ROUTE */
}


static int linux_write_system_file(const char *path, unsigned int val)
{
        char buf[50];
        int fd, len;

        len = os_snprintf(buf, sizeof(buf), "%u\n", val);
        if (os_snprintf_error(sizeof(buf), len))
                return -1;

        fd = open(path, O_WRONLY);
        if (fd < 0)
                return -1;

        if (write(fd, buf, len) < 0) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Failed to write Linux system file: %s with the value of %d",
                           path, val);
                close(fd);
                return -1;
        }
        close(fd);

        return 0;
}


static const char * drv_br_port_attr_str(enum drv_br_port_attr attr)
{
        switch (attr) {
        case DRV_BR_PORT_ATTR_PROXYARP:
                return "proxyarp_wifi";
        case DRV_BR_PORT_ATTR_HAIRPIN_MODE:
                return "hairpin_mode";
        }

        return NULL;
}


static int wpa_driver_br_port_set_attr(void *priv, enum drv_br_port_attr attr,
                                       unsigned int val)
{
        struct i802_bss *bss = priv;
        char path[128];
        const char *attr_txt;

        attr_txt = drv_br_port_attr_str(attr);
        if (attr_txt == NULL)
                return -EINVAL;

        os_snprintf(path, sizeof(path), "/sys/class/net/%s/brport/%s",
                    bss->ifname, attr_txt);

        if (linux_write_system_file(path, val))
                return -1;

        return 0;
}


static const char * drv_br_net_param_str(enum drv_br_net_param param)
{
        switch (param) {
        case DRV_BR_NET_PARAM_GARP_ACCEPT:
                return "arp_accept";
        default:
                return NULL;
        }
}


static int wpa_driver_br_set_net_param(void *priv, enum drv_br_net_param param,
                                       unsigned int val)
{
        struct i802_bss *bss = priv;
        char path[128];
        const char *param_txt;
        int ip_version = 4;

        if (param == DRV_BR_MULTICAST_SNOOPING) {
                os_snprintf(path, sizeof(path),
                            "/sys/devices/virtual/net/%s/bridge/multicast_snooping",
                            bss->brname);
                goto set_val;
        }

        param_txt = drv_br_net_param_str(param);
        if (param_txt == NULL)
                return -EINVAL;

        switch (param) {
                case DRV_BR_NET_PARAM_GARP_ACCEPT:
                        ip_version = 4;
                        break;
                default:
                        return -EINVAL;
        }

        os_snprintf(path, sizeof(path), "/proc/sys/net/ipv%d/conf/%s/%s",
                    ip_version, bss->brname, param_txt);

set_val:
        if (linux_write_system_file(path, val))
                return -1;

        return 0;
}


#ifdef CONFIG_DRIVER_NL80211_QCA

static int hw_mode_to_qca_acs(enum hostapd_hw_mode hw_mode)
{
        switch (hw_mode) {
        case HOSTAPD_MODE_IEEE80211B:
                return QCA_ACS_MODE_IEEE80211B;
        case HOSTAPD_MODE_IEEE80211G:
                return QCA_ACS_MODE_IEEE80211G;
        case HOSTAPD_MODE_IEEE80211A:
                return QCA_ACS_MODE_IEEE80211A;
        case HOSTAPD_MODE_IEEE80211AD:
                return QCA_ACS_MODE_IEEE80211AD;
        case HOSTAPD_MODE_IEEE80211ANY:
                return QCA_ACS_MODE_IEEE80211ANY;
        default:
                return -1;
        }
}


static int add_acs_freq_list(struct nl_msg *msg, const int *freq_list)
{
        int i, len, ret;
        u32 *freqs;

        if (!freq_list)
                return 0;
        len = int_array_len(freq_list);
        freqs = os_malloc(sizeof(u32) * len);
        if (!freqs)
                return -1;
        for (i = 0; i < len; i++)
                freqs[i] = freq_list[i];
        ret = nla_put(msg, QCA_WLAN_VENDOR_ATTR_ACS_FREQ_LIST,
                      sizeof(u32) * len, freqs);
        os_free(freqs);
        return ret;
}


static int wpa_driver_do_acs(void *priv, struct drv_acs_params *params)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        struct nlattr *data;
        int ret;
        int mode;

        mode = hw_mode_to_qca_acs(params->hw_mode);
        if (mode < 0)
                return -1;

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_VENDOR)) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, OUI_QCA) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD,
                        QCA_NL80211_VENDOR_SUBCMD_DO_ACS) ||
            !(data = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA)) ||
            nla_put_u8(msg, QCA_WLAN_VENDOR_ATTR_ACS_HW_MODE, mode) ||
            (params->ht_enabled &&
             nla_put_flag(msg, QCA_WLAN_VENDOR_ATTR_ACS_HT_ENABLED)) ||
            (params->ht40_enabled &&
             nla_put_flag(msg, QCA_WLAN_VENDOR_ATTR_ACS_HT40_ENABLED)) ||
            (params->vht_enabled &&
             nla_put_flag(msg, QCA_WLAN_VENDOR_ATTR_ACS_VHT_ENABLED)) ||
            nla_put_u16(msg, QCA_WLAN_VENDOR_ATTR_ACS_CHWIDTH,
                        params->ch_width) ||
            (params->ch_list_len &&
             nla_put(msg, QCA_WLAN_VENDOR_ATTR_ACS_CH_LIST, params->ch_list_len,
                     params->ch_list)) ||
            add_acs_freq_list(msg, params->freq_list)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }
        nla_nest_end(msg, data);

        wpa_printf(MSG_DEBUG,
                   "nl80211: ACS Params: HW_MODE: %d HT: %d HT40: %d VHT: %d BW: %d CH_LIST_LEN: %u",
                   params->hw_mode, params->ht_enabled, params->ht40_enabled,
                   params->vht_enabled, params->ch_width, params->ch_list_len);

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Failed to invoke driver ACS function: %s",
                           strerror(errno));
        }
        return ret;
}


static int nl80211_set_band(void *priv, enum set_band band)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        struct nlattr *data;
        int ret;
        enum qca_set_band qca_band;

        if (!drv->setband_vendor_cmd_avail)
                return -1;

        switch (band) {
        case WPA_SETBAND_AUTO:
                qca_band = QCA_SETBAND_AUTO;
                break;
        case WPA_SETBAND_5G:
                qca_band = QCA_SETBAND_5G;
                break;
        case WPA_SETBAND_2G:
                qca_band = QCA_SETBAND_2G;
                break;
        default:
                return -1;
        }

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_VENDOR)) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, OUI_QCA) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD,
                        QCA_NL80211_VENDOR_SUBCMD_SETBAND) ||
            !(data = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA)) ||
            nla_put_u32(msg, QCA_WLAN_VENDOR_ATTR_SETBAND_VALUE, qca_band)) {
                nlmsg_free(msg);
                return -ENOBUFS;
        }
        nla_nest_end(msg, data);

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        if (ret) {
                wpa_printf(MSG_DEBUG,
                           "nl80211: Driver setband function failed: %s",
                           strerror(errno));
        }
        return ret;
}


struct nl80211_pcl {
        unsigned int num;
        unsigned int *freq_list;
};

static int preferred_freq_info_handler(struct nl_msg *msg, void *arg)
{
        struct nlattr *tb[NL80211_ATTR_MAX + 1];
        struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
        struct nl80211_pcl *param = arg;
        struct nlattr *nl_vend, *attr;
        enum qca_iface_type iface_type;
        struct nlattr *tb_vendor[QCA_WLAN_VENDOR_ATTR_MAX + 1];
        unsigned int num, max_num;
        u32 *freqs;

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

        nl_vend = tb[NL80211_ATTR_VENDOR_DATA];
        if (!nl_vend)
                return NL_SKIP;

        nla_parse(tb_vendor, QCA_WLAN_VENDOR_ATTR_MAX,
                  nla_data(nl_vend), nla_len(nl_vend), NULL);

        attr = tb_vendor[
                QCA_WLAN_VENDOR_ATTR_GET_PREFERRED_FREQ_LIST_IFACE_TYPE];
        if (!attr) {
                wpa_printf(MSG_ERROR, "nl80211: iface_type couldn't be found");
                param->num = 0;
                return NL_SKIP;
        }

        iface_type = (enum qca_iface_type) nla_get_u32(attr);
        wpa_printf(MSG_DEBUG, "nl80211: Driver returned iface_type=%d",
                   iface_type);

        attr = tb_vendor[QCA_WLAN_VENDOR_ATTR_GET_PREFERRED_FREQ_LIST];
        if (!attr) {
                wpa_printf(MSG_ERROR,
                           "nl80211: preferred_freq_list couldn't be found");
                param->num = 0;
                return NL_SKIP;
        }

        /*
         * param->num has the maximum number of entries for which there
         * is room in the freq_list provided by the caller.
         */
        freqs = nla_data(attr);
        max_num = nla_len(attr) / sizeof(u32);
        if (max_num > param->num)
                max_num = param->num;
        for (num = 0; num < max_num; num++)
                param->freq_list[num] = freqs[num];
        param->num = num;

        return NL_SKIP;
}


static int nl80211_get_pref_freq_list(void *priv,
                                      enum wpa_driver_if_type if_type,
                                      unsigned int *num,
                                      unsigned int *freq_list)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;
        unsigned int i;
        struct nlattr *params;
        struct nl80211_pcl param;
        enum qca_iface_type iface_type;

        if (!drv->get_pref_freq_list)
                return -1;

        switch (if_type) {
        case WPA_IF_STATION:
                iface_type = QCA_IFACE_TYPE_STA;
                break;
        case WPA_IF_AP_BSS:
                iface_type = QCA_IFACE_TYPE_AP;
                break;
        case WPA_IF_P2P_GO:
                iface_type = QCA_IFACE_TYPE_P2P_GO;
                break;
        case WPA_IF_P2P_CLIENT:
                iface_type = QCA_IFACE_TYPE_P2P_CLIENT;
                break;
        case WPA_IF_IBSS:
                iface_type = QCA_IFACE_TYPE_IBSS;
                break;
        case WPA_IF_TDLS:
                iface_type = QCA_IFACE_TYPE_TDLS;
                break;
        default:
                return -1;
        }

        param.num = *num;
        param.freq_list = freq_list;

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_VENDOR)) ||
            nla_put_u32(msg, NL80211_ATTR_IFINDEX, drv->ifindex) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, OUI_QCA) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD,
                        QCA_NL80211_VENDOR_SUBCMD_GET_PREFERRED_FREQ_LIST) ||
            !(params = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA)) ||
            nla_put_u32(msg,
                        QCA_WLAN_VENDOR_ATTR_GET_PREFERRED_FREQ_LIST_IFACE_TYPE,
                        iface_type)) {
                wpa_printf(MSG_ERROR,
                           "%s: err in adding vendor_cmd and vendor_data",
                           __func__);
                nlmsg_free(msg);
                return -1;
        }
        nla_nest_end(msg, params);

        os_memset(freq_list, 0, *num * sizeof(freq_list[0]));
        ret = send_and_recv_msgs(drv, msg, preferred_freq_info_handler, &param);
        if (ret) {
                wpa_printf(MSG_ERROR,
                           "%s: err in send_and_recv_msgs", __func__);
                return ret;
        }

        *num = param.num;

        for (i = 0; i < *num; i++) {
                wpa_printf(MSG_DEBUG, "nl80211: preferred_channel_list[%d]=%d",
                           i, freq_list[i]);
        }

        return 0;
}


static int nl80211_set_prob_oper_freq(void *priv, unsigned int freq)
{
        struct i802_bss *bss = priv;
        struct wpa_driver_nl80211_data *drv = bss->drv;
        struct nl_msg *msg;
        int ret;
        struct nlattr *params;

        if (!drv->set_prob_oper_freq)
                return -1;

        wpa_printf(MSG_DEBUG,
                   "nl80211: Set P2P probable operating freq %u for ifindex %d",
                   freq, bss->ifindex);

        if (!(msg = nl80211_drv_msg(drv, 0, NL80211_CMD_VENDOR)) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, OUI_QCA) ||
            nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD,
                        QCA_NL80211_VENDOR_SUBCMD_SET_PROBABLE_OPER_CHANNEL) ||
            !(params = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA)) ||
            nla_put_u32(msg,
                        QCA_WLAN_VENDOR_ATTR_PROBABLE_OPER_CHANNEL_IFACE_TYPE,
                        QCA_IFACE_TYPE_P2P_CLIENT) ||
            nla_put_u32(msg,
                        QCA_WLAN_VENDOR_ATTR_PROBABLE_OPER_CHANNEL_FREQ,
                        freq)) {
                wpa_printf(MSG_ERROR,
                           "%s: err in adding vendor_cmd and vendor_data",
                           __func__);
                nlmsg_free(msg);
                return -1;
        }
        nla_nest_end(msg, params);

        ret = send_and_recv_msgs(drv, msg, NULL, NULL);
        msg = NULL;
        if (ret) {
                wpa_printf(MSG_ERROR, "%s: err in send_and_recv_msgs",
                           __func__);
                return ret;
        }
        nlmsg_free(msg);
        return 0;
}

#endif /* CONFIG_DRIVER_NL80211_QCA */


const struct wpa_driver_ops wpa_driver_nl80211_ops = {
        .name = "nl80211",
        .desc = "Linux nl80211/cfg80211",
        .get_bssid = wpa_driver_nl80211_get_bssid,
        .get_ssid = wpa_driver_nl80211_get_ssid,
        .set_key = driver_nl80211_set_key,
        .scan2 = driver_nl80211_scan2,
        .sched_scan = wpa_driver_nl80211_sched_scan,
        .stop_sched_scan = wpa_driver_nl80211_stop_sched_scan,
        .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
        .abort_scan = wpa_driver_nl80211_abort_scan,
        .deauthenticate = driver_nl80211_deauthenticate,
        .authenticate = driver_nl80211_authenticate,
        .associate = wpa_driver_nl80211_associate,
        .global_init = nl80211_global_init,
        .global_deinit = nl80211_global_deinit,
        .init2 = wpa_driver_nl80211_init,
        .deinit = driver_nl80211_deinit,
        .get_capa = wpa_driver_nl80211_get_capa,
        .set_operstate = wpa_driver_nl80211_set_operstate,
        .set_supp_port = wpa_driver_nl80211_set_supp_port,
        .set_country = wpa_driver_nl80211_set_country,
        .get_country = wpa_driver_nl80211_get_country,
        .set_ap = wpa_driver_nl80211_set_ap,
        .set_acl = wpa_driver_nl80211_set_acl,
        .if_add = wpa_driver_nl80211_if_add,
        .if_remove = driver_nl80211_if_remove,
        .send_mlme = driver_nl80211_send_mlme,
        .get_hw_feature_data = nl80211_get_hw_feature_data,
        .sta_add = wpa_driver_nl80211_sta_add,
        .sta_remove = driver_nl80211_sta_remove,
        .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
        .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
        .hapd_init = i802_init,
        .hapd_deinit = i802_deinit,
        .set_wds_sta = i802_set_wds_sta,
        .get_seqnum = i802_get_seqnum,
        .flush = i802_flush,
        .get_inact_sec = i802_get_inact_sec,
        .sta_clear_stats = i802_sta_clear_stats,
        .set_rts = i802_set_rts,
        .set_frag = i802_set_frag,
        .set_tx_queue_params = i802_set_tx_queue_params,
        .set_sta_vlan = driver_nl80211_set_sta_vlan,
        .sta_deauth = i802_sta_deauth,
        .sta_disassoc = i802_sta_disassoc,
        .read_sta_data = driver_nl80211_read_sta_data,
        .set_freq = i802_set_freq,
        .send_action = driver_nl80211_send_action,
        .send_action_cancel_wait = wpa_driver_nl80211_send_action_cancel_wait,
        .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
        .cancel_remain_on_channel =
        wpa_driver_nl80211_cancel_remain_on_channel,
        .probe_req_report = driver_nl80211_probe_req_report,
        .deinit_ap = wpa_driver_nl80211_deinit_ap,
        .deinit_p2p_cli = wpa_driver_nl80211_deinit_p2p_cli,
        .resume = wpa_driver_nl80211_resume,
        .signal_monitor = nl80211_signal_monitor,
        .signal_poll = nl80211_signal_poll,
        .send_frame = nl80211_send_frame,
        .set_param = nl80211_set_param,
        .get_radio_name = nl80211_get_radio_name,
        .add_pmkid = nl80211_add_pmkid,
        .remove_pmkid = nl80211_remove_pmkid,
        .flush_pmkid = nl80211_flush_pmkid,
        .set_rekey_info = nl80211_set_rekey_info,
        .poll_client = nl80211_poll_client,
        .set_p2p_powersave = nl80211_set_p2p_powersave,
        .start_dfs_cac = nl80211_start_radar_detection,
        .stop_ap = wpa_driver_nl80211_stop_ap,
#ifdef CONFIG_TDLS
        .send_tdls_mgmt = nl80211_send_tdls_mgmt,
        .tdls_oper = nl80211_tdls_oper,
        .tdls_enable_channel_switch = nl80211_tdls_enable_channel_switch,
        .tdls_disable_channel_switch = nl80211_tdls_disable_channel_switch,
#endif /* CONFIG_TDLS */
        .update_ft_ies = wpa_driver_nl80211_update_ft_ies,
        .get_mac_addr = wpa_driver_nl80211_get_macaddr,
        .get_survey = wpa_driver_nl80211_get_survey,
        .status = wpa_driver_nl80211_status,
        .switch_channel = nl80211_switch_channel,
#ifdef ANDROID_P2P
        .set_noa = wpa_driver_set_p2p_noa,
        .get_noa = wpa_driver_get_p2p_noa,
        .set_ap_wps_ie = wpa_driver_set_ap_wps_p2p_ie,
#endif /* ANDROID_P2P */
#ifdef ANDROID
#ifndef ANDROID_LIB_STUB
        .driver_cmd = wpa_driver_nl80211_driver_cmd,
#endif /* !ANDROID_LIB_STUB */
#endif /* ANDROID */
        .vendor_cmd = nl80211_vendor_cmd,
        .set_qos_map = nl80211_set_qos_map,
        .set_wowlan = nl80211_set_wowlan,
#ifdef CONFIG_DRIVER_NL80211_QCA
        .roaming = nl80211_roaming,
#endif /* CONFIG_DRIVER_NL80211_QCA */
        .set_mac_addr = nl80211_set_mac_addr,
#ifdef CONFIG_MESH
        .init_mesh = wpa_driver_nl80211_init_mesh,
        .join_mesh = wpa_driver_nl80211_join_mesh,
        .leave_mesh = wpa_driver_nl80211_leave_mesh,
#endif /* CONFIG_MESH */
        .br_add_ip_neigh = wpa_driver_br_add_ip_neigh,
        .br_delete_ip_neigh = wpa_driver_br_delete_ip_neigh,
        .br_port_set_attr = wpa_driver_br_port_set_attr,
        .br_set_net_param = wpa_driver_br_set_net_param,
        .add_tx_ts = nl80211_add_ts,
        .del_tx_ts = nl80211_del_ts,
        .get_ifindex = nl80211_get_ifindex,
#ifdef CONFIG_DRIVER_NL80211_QCA
        .do_acs = wpa_driver_do_acs,
        .set_band = nl80211_set_band,
        .get_pref_freq_list = nl80211_get_pref_freq_list,
        .set_prob_oper_freq = nl80211_set_prob_oper_freq,
#endif /* CONFIG_DRIVER_NL80211_QCA */
};