text: /*
   * 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 "common/wpa_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 NETLINK_CAP_ACK
  #define NETLINK_CAP_ACK 10
  #endif /* NETLINK_CAP_ACK */
  /* support for extack if compilation headers are too old */
  #ifndef NETLINK_EXT_ACK
  #define NETLINK_EXT_ACK 11
  enum nlmsgerr_attrs {
  	NLMSGERR_ATTR_UNUSED,
  	NLMSGERR_ATTR_MSG,
  	NLMSGERR_ATTR_OFFS,
  	NLMSGERR_ATTR_COOKIE,
  
  	__NLMSGERR_ATTR_MAX,
  	NLMSGERR_ATTR_MAX = __NLMSGERR_ATTR_MAX - 1
  };
  #endif
  #ifndef NLM_F_CAPPED
  #define NLM_F_CAPPED 0x100
  #endif
  #ifndef NLM_F_ACK_TLVS
  #define NLM_F_ACK_TLVS 0x200
  #endif
  #ifndef SOL_NETLINK
  #define SOL_NETLINK 270
  #endif
  
  #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, int persist)
  {
  #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);
  	if (!persist)
  		*handle = (void *) (((intptr_t) *handle) ^
  				    ELOOP_SOCKET_INVALID);
  }
  
  
  static void nl80211_destroy_eloop_handle(struct nl_handle **handle, int persist)
  {
  	if (!persist)
  		*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);
  #ifdef CONFIG_MESH
  static int nl80211_put_mesh_config(struct nl_msg *msg,
  				   struct wpa_driver_mesh_bss_params *params);
  #endif /* CONFIG_MESH */
  static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
  			     u16 reason);
  
  
  /* 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);
  	drv->first_bss->freq = 0;
  }
  
  
  /* 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)
  {
  	struct nlmsghdr *nlh = (struct nlmsghdr *) err - 1;
  	int len = nlh->nlmsg_len;
  	struct nlattr *attrs;
  	struct nlattr *tb[NLMSGERR_ATTR_MAX + 1];
  	int *ret = arg;
  	int ack_len = sizeof(*nlh) + sizeof(int) + sizeof(*nlh);
  
  	*ret = err->error;
  
  	if (!(nlh->nlmsg_flags & NLM_F_ACK_TLVS))
  		return NL_SKIP;
  
  	if (!(nlh->nlmsg_flags & NLM_F_CAPPED))
  		ack_len += err->msg.nlmsg_len - sizeof(*nlh);
  
  	if (len <= ack_len)
  		return NL_STOP;
  
  	attrs = (void *) ((unsigned char *) nlh + ack_len);
  	len -= ack_len;
  
  	nla_parse(tb, NLMSGERR_ATTR_MAX, attrs, len, NULL);
  	if (tb[NLMSGERR_ATTR_MSG]) {
  		len = strnlen((char *) nla_data(tb[NLMSGERR_ATTR_MSG]),
  			      nla_len(tb[NLMSGERR_ATTR_MSG]));
  		wpa_printf(MSG_ERROR, "nl80211: kernel reports: %*s",
  			   len, (char *) nla_data(tb[NLMSGERR_ATTR_MSG]));
  	}
  
  	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, opt;
  
  	if (!msg)
  		return -ENOMEM;
  
  	cb = nl_cb_clone(global->nl_cb);
  	if (!cb)
  		goto out;
  
  	/* try to set NETLINK_EXT_ACK to 1, ignoring errors */
  	opt = 1;
  	setsockopt(nl_socket_get_fd(nl_handle), SOL_NETLINK,
  		   NETLINK_EXT_ACK, &opt, sizeof(opt));
  
  	/* try to set NETLINK_CAP_ACK to 1, ignoring errors */
  	opt = 1;
  	setsockopt(nl_socket_get_fd(nl_handle), SOL_NETLINK,
  		   NETLINK_CAP_ACK, &opt, sizeof(opt));
  
  	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)
  {
  	if (TEST_FAIL())
  		return NULL;
  	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;
  	u8 channel;
  
  	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);
  
  	/* Beacon frames not supported in IEEE 802.11ad */
  	if (ieee80211_freq_to_chan(bss->freq, &channel) !=
  	    HOSTAPD_MODE_IEEE80211AD) {
  		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, 0);
  	}
  
  	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;
  
  	if (w->nl_beacons)
  		nl80211_destroy_eloop_handle(&w->nl_beacons, 0);
  
  	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");
  		if (wpa_driver_nl80211_finish_drv_init(drv, NULL, 0, NULL) < 0)
  			return -1;
  		return 1;
  	}
  
  	return 0;
  }
  
  
  static struct wpa_driver_nl80211_data *
  nl80211_find_drv(struct nl80211_global *global, int idx, u8 *buf, size_t len,
  		 int *init_failed)
  {
  	struct wpa_driver_nl80211_data *drv;
  	int res;
  
  	if (init_failed)
  		*init_failed = 0;
  	dl_list_for_each(drv, &global->interfaces,
  			 struct wpa_driver_nl80211_data, list) {
  		res = wpa_driver_nl80211_own_ifindex(drv, idx, buf, len);
  		if (res < 0) {
  			wpa_printf(MSG_DEBUG,
  				   "nl80211: Found matching own interface, but failed to complete reinitialization");
  			if (init_failed)
  				*init_failed = 1;
  			return drv;
  		}
  		if (res > 0 || have_ifidx(drv, idx, IFIDX_ANY))
  			return drv;
  	}
  	return NULL;
  }
  
  
  static void nl80211_refresh_mac(struct wpa_driver_nl80211_data *drv,
  				int ifindex, int notify)
  {
  	struct i802_bss *bss;
  	u8 addr[ETH_ALEN];
  
  	bss = get_bss_ifindex(drv, ifindex);
  	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,
  			   ifindex, bss->ifname,
  			   MAC2STR(bss->addr), MAC2STR(addr));
  		os_memcpy(bss->addr, addr, ETH_ALEN);
  		if (notify)
  			wpa_supplicant_event(drv->ctx,
  					     EVENT_INTERFACE_MAC_CHANGED, 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;
  	int init_failed;
  
  	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, &init_failed);
  	if (!drv)
  		goto event_newlink;
  	if (init_failed)
  		return; /* do not update interface state */
  
  	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;
  			/* Re-read MAC address as it may have changed */
  			nl80211_refresh_mac(drv, ifi->ifi_index, 1);
  			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, NULL);
  			if (!drv)
  				return;
  		}
  	}
  
  	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 up "
  				   "event since interface %s is down",
  				   namebuf);
  			return;
  		}
  		wpa_printf(MSG_DEBUG, "nl80211: Interface up (%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 up",
  				   drv->first_bss->ifname);
  		} 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 {
  			/* Re-read MAC address as it may have changed */
  			nl80211_refresh_mac(drv, ifi->ifi_index, 0);
  
  			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, NULL);
  
  	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);
  }
  
  
  struct nl80211_get_assoc_freq_arg {
  	struct wpa_driver_nl80211_data *drv;
  	unsigned int assoc_freq;
  	unsigned int ibss_freq;
  	u8 assoc_bssid[ETH_ALEN];
  	u8 assoc_ssid[SSID_MAX_LEN];
  	u8 assoc_ssid_len;
  };
  
  static int nl80211_get_assoc_freq_handler(struct nl_msg *msg, void *arg)
  {
  	struct nlattr *tb[NL80211_ATTR_MAX + 1];
  	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
  	struct nlattr *bss[NL80211_BSS_MAX + 1];
  	static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
  		[NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
  		[NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
  		[NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
  		[NL80211_BSS_STATUS] = { .type = NLA_U32 },
  	};
  	struct nl80211_get_assoc_freq_arg *ctx = arg;
  	enum nl80211_bss_status status;
  
  	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
  		  genlmsg_attrlen(gnlh, 0), NULL);
  	if (!tb[NL80211_ATTR_BSS] ||
  	    nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
  			     bss_policy) ||
  	    !bss[NL80211_BSS_STATUS])
  		return NL_SKIP;
  
  	status = nla_get_u32(bss[NL80211_BSS_STATUS]);
  	if (status == NL80211_BSS_STATUS_ASSOCIATED &&
  	    bss[NL80211_BSS_FREQUENCY]) {
  		ctx->assoc_freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
  		wpa_printf(MSG_DEBUG, "nl80211: Associated on %u MHz",
  			   ctx->assoc_freq);
  	}
  	if (status == NL80211_BSS_STATUS_IBSS_JOINED &&
  	    bss[NL80211_BSS_FREQUENCY]) {
  		ctx->ibss_freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
  		wpa_printf(MSG_DEBUG, "nl80211: IBSS-joined on %u MHz",
  			   ctx->ibss_freq);
  	}
  	if (status == NL80211_BSS_STATUS_ASSOCIATED &&
  	    bss[NL80211_BSS_BSSID]) {
  		os_memcpy(ctx->assoc_bssid,
  			  nla_data(bss[NL80211_BSS_BSSID]), ETH_ALEN);
  		wpa_printf(MSG_DEBUG, "nl80211: Associated with "
  			   MACSTR, MAC2STR(ctx->assoc_bssid));
  	}
  
  	if (status == NL80211_BSS_STATUS_ASSOCIATED &&
  	    bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
  		const u8 *ie, *ssid;
  		size_t ie_len;
  
  		ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
  		ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
  		ssid = get_ie(ie, ie_len, WLAN_EID_SSID);
  		if (ssid && ssid[1] > 0 && ssid[1] <= SSID_MAX_LEN) {
  			ctx->assoc_ssid_len = ssid[1];
  			os_memcpy(ctx->assoc_ssid, ssid + 2, ssid[1]);
  		}
  	}
  
  	return NL_SKIP;
  }
  
  
  int nl80211_get_assoc_ssid(struct wpa_driver_nl80211_data *drv, u8 *ssid)
  {
  	struct nl_msg *msg;
  	int ret;
  	struct nl80211_get_assoc_freq_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, nl80211_get_assoc_freq_handler,
  				 &arg);
  	if (ret == 0) {
  		os_memcpy(ssid, arg.assoc_ssid, arg.assoc_ssid_len);
  		return arg.assoc_ssid_len;
  	}
  	wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d (%s)",
  		   ret, strerror(-ret));
  	return ret;
  }
  
  
  unsigned int nl80211_get_assoc_freq(struct wpa_driver_nl80211_data *drv)
  {
  	struct nl_msg *msg;
  	int ret;
  	struct nl80211_get_assoc_freq_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, nl80211_get_assoc_freq_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 = -WPA_INVALID_NOISE;
  	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 = WPA_INVALID_NOISE;
  	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 int get_channel_info(struct nl_msg *msg, void *arg)
  {
  	struct nlattr *tb[NL80211_ATTR_MAX + 1] = { 0 };
  	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
  	struct wpa_channel_info *chan_info = arg;
  
  	nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
  		  genlmsg_attrlen(gnlh, 0), NULL);
  
  	os_memset(chan_info, 0, sizeof(struct wpa_channel_info));
  	chan_info->chanwidth = CHAN_WIDTH_UNKNOWN;
  
  	if (tb[NL80211_ATTR_WIPHY_FREQ])
  		chan_info->frequency =
  			nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
  	if (tb[NL80211_ATTR_CHANNEL_WIDTH])
  		chan_info->chanwidth = convert2width(
  			nla_get_u32(tb[NL80211_ATTR_CHANNEL_WIDTH]));
  	if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
  		enum nl80211_channel_type ct =
  			nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
  
  		switch (ct) {
  		case NL80211_CHAN_HT40MINUS:
  			chan_info->sec_channel = -1;
  			break;
  		case NL80211_CHAN_HT40PLUS:
  			chan_info->sec_channel = 1;
  			break;
  		default:
  			chan_info->sec_channel = 0;
  			break;
  		}
  	}
  	if (tb[NL80211_ATTR_CENTER_FREQ1])
  		chan_info->center_frq1 =
  			nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ1]);
  	if (tb[NL80211_ATTR_CENTER_FREQ2])
  		chan_info->center_frq2 =
  			nla_get_u32(tb[NL80211_ATTR_CENTER_FREQ2]);
  
  	if (chan_info->center_frq2) {
  		u8 seg1_idx = 0;
  
  		if (ieee80211_freq_to_chan(chan_info->center_frq2, &seg1_idx) !=
  		    NUM_HOSTAPD_MODES)
  			chan_info->seg1_idx = seg1_idx;
  	}
  
  	return NL_SKIP;
  }
  
  
  static int nl80211_channel_info(void *priv, struct wpa_channel_info *ci)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	struct nl_msg *msg;
  
  	msg = nl80211_drv_msg(drv, 0, NL80211_CMD_GET_INTERFACE);
  	return send_and_recv_msgs(drv, msg, get_channel_info, ci);
  }
  
  
  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, 0);
  
  	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 = ARRAY_SIZE(drv->default_if_indices);
  	drv->if_indices = drv->default_if_indices;
  
  	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, 0);
  }
  
  
  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_init_connect_handle(struct i802_bss *bss)
  {
  	if (bss->nl_connect) {
  		wpa_printf(MSG_DEBUG,
  			   "nl80211: Connect handle already created (nl_connect=%p)",
  			   bss->nl_connect);
  		return -1;
  	}
  
  	bss->nl_connect = nl_create_handle(bss->nl_cb, "connect");
  	if (!bss->nl_connect)
  		return -1;
  	nl80211_register_eloop_read(&bss->nl_connect,
  				    wpa_driver_nl80211_event_receive,
  				    bss->nl_cb, 1);
  	return 0;
  }
  
  
  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 ||
  	    ((drv->capa.flags & WPA_DRIVER_FLAGS_SAE) &&
  	     !(drv->capa.flags & WPA_DRIVER_FLAGS_SME))) {
  		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) || defined(CONFIG_DPP)
  	/* 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 || CONFIG_DPP */
  #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_DPP
  	/* DPP Public Action */
  	if (nl80211_register_action_frame(bss,
  					  (u8 *) "\x04\x09\x50\x6f\x9a\x1a",
  					  6) < 0)
  		ret = -1;
  #endif /* CONFIG_DPP */
  #ifdef CONFIG_IEEE80211W
  #ifdef CONFIG_OCV
  	/* SA Query Request */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x08\x00", 2) < 0)
  		ret = -1;
  #endif /* CONFIG_OCV */
  	/* 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_WNM
  	/* WNM - Collocated Interference Request */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x0a\x0b", 2) < 0)
  		ret = -1;
  #endif /* CONFIG_WNM */
  
  #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 - Radio Measurement Request */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x05\x00", 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_action_subscribe_ap(struct i802_bss *bss)
  {
  	int ret = 0;
  
  	/* Public Action frames */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x04", 1) < 0)
  		ret = -1;
  	/* RRM Measurement Report */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x05\x01", 2) < 0)
  		ret = -1;
  	/* RRM Link Measurement Report */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x05\x03", 2) < 0)
  		ret = -1;
  	/* RRM Neighbor Report Request */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x05\x04", 2) < 0)
  		ret = -1;
  	/* FT Action frames */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x06", 1) < 0)
  		ret = -1;
  #ifdef CONFIG_IEEE80211W
  	/* SA Query */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x08", 1) < 0)
  		ret = -1;
  #endif /* CONFIG_IEEE80211W */
  	/* Protected Dual of Public Action */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x09", 1) < 0)
  		ret = -1;
  	/* WNM */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x0a", 1) < 0)
  		ret = -1;
  	/* WMM */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x11", 1) < 0)
  		ret = -1;
  #ifdef CONFIG_FST
  	/* FST Action frames */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x12", 1) < 0)
  		ret = -1;
  #endif /* CONFIG_FST */
  	/* Vendor-specific */
  	if (nl80211_register_action_frame(bss, (u8 *) "\x7f", 1) < 0)
  		ret = -1;
  
  	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_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_action_subscribe_ap(bss))
  		goto out_err;
  
  	if (nl80211_register_spurious_class3(bss))
  		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_action_subscribe_ap(bss))
  		goto out_err;
  
  	if (bss->drv->device_ap_sme) {
  		u16 type = (WLAN_FC_TYPE_MGMT << 2) | (WLAN_FC_STYPE_AUTH << 4);
  
  		/* Register for all Authentication frames */
  		if (nl80211_register_frame(bss, bss->nl_mgmt, type, NULL, 0)
  		    < 0)
  			wpa_printf(MSG_DEBUG,
  				   "nl80211: Failed to subscribe to handle Authentication frames - SAE offload may not work");
  	}
  
  	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, 0);
  
  	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 ||
  		 nl80211_get_ifmode(bss) == NL80211_IFTYPE_MESH_POINT)
  		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);
  
  	nl80211_init_connect_handle(bss);
  
  	return 0;
  }
  
  
  static int wpa_driver_nl80211_del_beacon(struct i802_bss *bss)
  {
  	struct nl_msg *msg;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  
  	wpa_printf(MSG_DEBUG, "nl80211: Remove beacon (ifindex=%d)",
  		   drv->ifindex);
  	nl80211_put_wiphy_data_ap(bss);
  	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;
  	unsigned int i;
  
  	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(bss);
  
  	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->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);
  	}
  
  	if (bss->nl_connect)
  		nl80211_destroy_eloop_handle(&bss->nl_connect, 1);
  
  	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);
  	for (i = 0; i < drv->num_iface_ext_capa; i++) {
  		os_free(drv->iface_ext_capa[i].ext_capa);
  		os_free(drv->iface_ext_capa[i].ext_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 RSN_CIPHER_SUITE_WEP40;
  		return RSN_CIPHER_SUITE_WEP104;
  	case WPA_ALG_TKIP:
  		return RSN_CIPHER_SUITE_TKIP;
  	case WPA_ALG_CCMP:
  		return RSN_CIPHER_SUITE_CCMP;
  	case WPA_ALG_GCMP:
  		return RSN_CIPHER_SUITE_GCMP;
  	case WPA_ALG_CCMP_256:
  		return RSN_CIPHER_SUITE_CCMP_256;
  	case WPA_ALG_GCMP_256:
  		return RSN_CIPHER_SUITE_GCMP_256;
  	case WPA_ALG_IGTK:
  		return RSN_CIPHER_SUITE_AES_128_CMAC;
  	case WPA_ALG_BIP_GMAC_128:
  		return RSN_CIPHER_SUITE_BIP_GMAC_128;
  	case WPA_ALG_BIP_GMAC_256:
  		return RSN_CIPHER_SUITE_BIP_GMAC_256;
  	case WPA_ALG_BIP_CMAC_256:
  		return RSN_CIPHER_SUITE_BIP_CMAC_256;
  	case WPA_ALG_SMS4:
  		return RSN_CIPHER_SUITE_SMS4;
  	case WPA_ALG_KRK:
  		return RSN_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 RSN_CIPHER_SUITE_CCMP_256;
  	case WPA_CIPHER_GCMP_256:
  		return RSN_CIPHER_SUITE_GCMP_256;
  	case WPA_CIPHER_CCMP:
  		return RSN_CIPHER_SUITE_CCMP;
  	case WPA_CIPHER_GCMP:
  		return RSN_CIPHER_SUITE_GCMP;
  	case WPA_CIPHER_TKIP:
  		return RSN_CIPHER_SUITE_TKIP;
  	case WPA_CIPHER_WEP104:
  		return RSN_CIPHER_SUITE_WEP104;
  	case WPA_CIPHER_WEP40:
  		return RSN_CIPHER_SUITE_WEP40;
  	case WPA_CIPHER_GTK_NOT_USED:
  		return RSN_CIPHER_SUITE_NO_GROUP_ADDRESSED;
  	}
  
  	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++] = RSN_CIPHER_SUITE_CCMP_256;
  	if (num_suites < max_suites && ciphers & WPA_CIPHER_GCMP_256)
  		suites[num_suites++] = RSN_CIPHER_SUITE_GCMP_256;
  	if (num_suites < max_suites && ciphers & WPA_CIPHER_CCMP)
  		suites[num_suites++] = RSN_CIPHER_SUITE_CCMP;
  	if (num_suites < max_suites && ciphers & WPA_CIPHER_GCMP)
  		suites[num_suites++] = RSN_CIPHER_SUITE_GCMP;
  	if (num_suites < max_suites && ciphers & WPA_CIPHER_TKIP)
  		suites[num_suites++] = RSN_CIPHER_SUITE_TKIP;
  	if (num_suites < max_suites && ciphers & WPA_CIPHER_WEP104)
  		suites[num_suites++] = RSN_CIPHER_SUITE_WEP104;
  	if (num_suites < max_suites && ciphers & WPA_CIPHER_WEP40)
  		suites[num_suites++] = RSN_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 nl80211_set_pmk(struct wpa_driver_nl80211_data *drv,
  			   const u8 *key, size_t key_len,
  			   const u8 *addr)
  {
  	struct nl_msg *msg = NULL;
  	int ret;
  
  	/*
  	 * If the authenticator address is not set, assume it is
  	 * the current BSSID.
  	 */
  	if (!addr && drv->associated)
  		addr = drv->bssid;
  	else if (!addr)
  		return -1;
  
  	wpa_printf(MSG_DEBUG, "nl80211: Set PMK to the driver for " MACSTR,
  		   MAC2STR(addr));
  	wpa_hexdump_key(MSG_DEBUG, "nl80211: PMK", key, key_len);
  	msg = nl80211_drv_msg(drv, 0, NL80211_CMD_SET_PMK);
  	if (!msg ||
  	    nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
  	    nla_put(msg, NL80211_ATTR_PMK, key_len, key)) {
  		nl80211_nlmsg_clear(msg);
  		nlmsg_free(msg);
  		return -ENOBUFS;
  	}
  
  	ret = send_and_recv_msgs(drv, msg, NULL, (void *) -1);
  	if (ret) {
  		wpa_printf(MSG_DEBUG, "nl80211: Set PMK failed: ret=%d (%s)",
  			   ret, strerror(-ret));
  	}
  
  	return ret;
  }
  
  
  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_PMK &&
  	    (drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_8021X))
  		return nl80211_set_pmk(drv, key, key_len, addr);
  
  	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 ?
  				RSN_CIPHER_SUITE_WEP40 :
  				RSN_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,
  			    struct nl_handle *nl_connect)
  {
  	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;
  	}
  
  	if (nl_connect)
  		ret = send_and_recv(drv->global, nl_connect, msg, NULL, NULL);
  	else
  		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,
  					 u16 reason_code,
  					 struct nl_handle *nl_connect)
  {
  	int ret;
  	int drv_associated = drv->associated;
  
  	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, nl_connect);
  	/*
  	 * For locally generated disconnect, supplicant already generates a
  	 * DEAUTH event, so ignore the event from NL80211.
  	 */
  	drv->ignore_next_local_disconnect = drv_associated && (ret == 0);
  
  	return ret;
  }
  
  
  static int wpa_driver_nl80211_deauthenticate(struct i802_bss *bss,
  					     const u8 *addr, u16 reason_code)
  {
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	int ret;
  	int drv_associated = drv->associated;
  
  	if (drv->nlmode == NL80211_IFTYPE_ADHOC) {
  		nl80211_mark_disconnected(drv);
  		return nl80211_leave_ibss(drv, 1);
  	}
  	if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
  		struct nl_handle *nl_connect = NULL;
  
  		if (bss->use_nl_connect)
  			nl_connect = bss->nl_connect;
  		return wpa_driver_nl80211_disconnect(drv, reason_code,
  						     nl_connect);
  	}
  	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, NULL);
  	/*
  	 * For locally generated deauthenticate, supplicant already generates a
  	 * DEAUTH event, so ignore the event from NL80211.
  	 */
  	drv->ignore_next_local_deauth = drv_associated && (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 enum nl80211_auth_type get_nl_auth_type(int wpa_auth_alg)
  {
  	if (wpa_auth_alg & WPA_AUTH_ALG_OPEN)
  		return NL80211_AUTHTYPE_OPEN_SYSTEM;
  	if (wpa_auth_alg & WPA_AUTH_ALG_SHARED)
  		return NL80211_AUTHTYPE_SHARED_KEY;
  	if (wpa_auth_alg & WPA_AUTH_ALG_LEAP)
  		return NL80211_AUTHTYPE_NETWORK_EAP;
  	if (wpa_auth_alg & WPA_AUTH_ALG_FT)
  		return NL80211_AUTHTYPE_FT;
  	if (wpa_auth_alg & WPA_AUTH_ALG_SAE)
  		return NL80211_AUTHTYPE_SAE;
  	if (wpa_auth_alg & WPA_AUTH_ALG_FILS)
  		return NL80211_AUTHTYPE_FILS_SK;
  	if (wpa_auth_alg & WPA_AUTH_ALG_FILS_SK_PFS)
  		return NL80211_AUTHTYPE_FILS_SK_PFS;
  
  	return NL80211_AUTHTYPE_MAX;
  }
  
  
  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_printf(MSG_DEBUG, "  * SSID=%s",
  			   wpa_ssid_txt(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->auth_data) {
  		wpa_hexdump(MSG_DEBUG, "  * auth_data", params->auth_data,
  			    params->auth_data_len);
  		if (nla_put(msg, NL80211_ATTR_SAE_DATA, params->auth_data_len,
  			    params->auth_data))
  			goto fail;
  	}
  	type = get_nl_auth_type(params->auth_alg);
  	wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
  	if (type == NL80211_AUTHTYPE_MAX ||
  	    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): count=%d ret=%d (%s)",
  			count, ret, strerror(-ret));
  		count++;
  		if ((ret == -EALREADY || ret == -EEXIST) && 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 nl80211_put_dtim_period(struct nl_msg *msg, int dtim_period)
  {
  	if (dtim_period > 0) {
  		wpa_printf(MSG_DEBUG, "  * dtim_period=%d", dtim_period);
  		return nla_put_u32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
  	}
  
  	return 0;
  }
  
  
  #ifdef CONFIG_MESH
  static int nl80211_set_mesh_config(void *priv,
  				   struct wpa_driver_mesh_bss_params *params)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	struct nl_msg *msg;
  	int ret;
  
  	msg = nl80211_drv_msg(drv, 0, NL80211_CMD_SET_MESH_CONFIG);
  	if (!msg)
  		return -1;
  
  	ret = nl80211_put_mesh_config(msg, params);
  	if (ret < 0) {
  		nlmsg_free(msg);
  		return ret;
  	}
  
  	ret = send_and_recv_msgs(drv, msg, NULL, NULL);
  	if (ret) {
  		wpa_printf(MSG_ERROR,
  			   "nl80211: Mesh config set failed: %d (%s)",
  			   ret, strerror(-ret));
  		return ret;
  	}
  	return 0;
  }
  #endif /* CONFIG_MESH */
  
  
  static int nl80211_put_beacon_rate(struct nl_msg *msg, const u64 flags,
  				   struct wpa_driver_ap_params *params)
  {
  	struct nlattr *bands, *band;
  	struct nl80211_txrate_vht vht_rate;
  
  	if (!params->freq ||
  	    (params->beacon_rate == 0 &&
  	     params->rate_type == BEACON_RATE_LEGACY))
  		return 0;
  
  	bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
  	if (!bands)
  		return -1;
  
  	switch (params->freq->mode) {
  	case HOSTAPD_MODE_IEEE80211B:
  	case HOSTAPD_MODE_IEEE80211G:
  		band = nla_nest_start(msg, NL80211_BAND_2GHZ);
  		break;
  	case HOSTAPD_MODE_IEEE80211A:
  		band = nla_nest_start(msg, NL80211_BAND_5GHZ);
  		break;
  	case HOSTAPD_MODE_IEEE80211AD:
  		band = nla_nest_start(msg, NL80211_BAND_60GHZ);
  		break;
  	default:
  		return 0;
  	}
  
  	if (!band)
  		return -1;
  
  	os_memset(&vht_rate, 0, sizeof(vht_rate));
  
  	switch (params->rate_type) {
  	case BEACON_RATE_LEGACY:
  		if (!(flags & WPA_DRIVER_FLAGS_BEACON_RATE_LEGACY)) {
  			wpa_printf(MSG_INFO,
  				   "nl80211: Driver does not support setting Beacon frame rate (legacy)");
  			return -1;
  		}
  
  		if (nla_put_u8(msg, NL80211_TXRATE_LEGACY,
  			       (u8) params->beacon_rate / 5) ||
  		    nla_put(msg, NL80211_TXRATE_HT, 0, NULL) ||
  		    (params->freq->vht_enabled &&
  		     nla_put(msg, NL80211_TXRATE_VHT, sizeof(vht_rate),
  			     &vht_rate)))
  			return -1;
  
  		wpa_printf(MSG_DEBUG, " * beacon_rate = legacy:%u (* 100 kbps)",
  			   params->beacon_rate);
  		break;
  	case BEACON_RATE_HT:
  		if (!(flags & WPA_DRIVER_FLAGS_BEACON_RATE_HT)) {
  			wpa_printf(MSG_INFO,
  				   "nl80211: Driver does not support setting Beacon frame rate (HT)");
  			return -1;
  		}
  		if (nla_put(msg, NL80211_TXRATE_LEGACY, 0, NULL) ||
  		    nla_put_u8(msg, NL80211_TXRATE_HT, params->beacon_rate) ||
  		    (params->freq->vht_enabled &&
  		     nla_put(msg, NL80211_TXRATE_VHT, sizeof(vht_rate),
  			     &vht_rate)))
  			return -1;
  		wpa_printf(MSG_DEBUG, " * beacon_rate = HT-MCS %u",
  			   params->beacon_rate);
  		break;
  	case BEACON_RATE_VHT:
  		if (!(flags & WPA_DRIVER_FLAGS_BEACON_RATE_VHT)) {
  			wpa_printf(MSG_INFO,
  				   "nl80211: Driver does not support setting Beacon frame rate (VHT)");
  			return -1;
  		}
  		vht_rate.mcs[0] = BIT(params->beacon_rate);
  		if (nla_put(msg, NL80211_TXRATE_LEGACY, 0, NULL))
  			return -1;
  		if (nla_put(msg, NL80211_TXRATE_HT, 0, NULL))
  			return -1;
  		if (nla_put(msg, NL80211_TXRATE_VHT, sizeof(vht_rate),
  			    &vht_rate))
  			return -1;
  		wpa_printf(MSG_DEBUG, " * beacon_rate = VHT-MCS %u",
  			   params->beacon_rate);
  		break;
  	}
  
  	nla_nest_end(msg, band);
  	nla_nest_end(msg, bands);
  
  	return 0;
  }
  
  
  static int nl80211_set_multicast_to_unicast(struct i802_bss *bss,
  					    int multicast_to_unicast)
  {
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	struct nl_msg *msg;
  	int ret;
  
  	msg = nl80211_bss_msg(bss, 0, NL80211_CMD_SET_MULTICAST_TO_UNICAST);
  	if (!msg ||
  	    (multicast_to_unicast &&
  	     nla_put_flag(msg, NL80211_ATTR_MULTICAST_TO_UNICAST_ENABLED))) {
  		wpa_printf(MSG_ERROR,
  			   "nl80211: Failed to build NL80211_CMD_SET_MULTICAST_TO_UNICAST msg for %s",
  			   bss->ifname);
  		nlmsg_free(msg);
  		return -ENOBUFS;
  	}
  
  	ret = send_and_recv_msgs(drv, msg, NULL, NULL);
  
  	switch (ret) {
  	case 0:
  		wpa_printf(MSG_DEBUG,
  			   "nl80211: multicast to unicast %s on interface %s",
  			   multicast_to_unicast ? "enabled" : "disabled",
  			   bss->ifname);
  		break;
  	case -EOPNOTSUPP:
  		if (!multicast_to_unicast)
  			break;
  		wpa_printf(MSG_INFO,
  			   "nl80211: multicast to unicast not supported on interface %s",
  			   bss->ifname);
  		break;
  	default:
  		wpa_printf(MSG_ERROR,
  			   "nl80211: %s multicast to unicast failed with %d (%s) on interface %s",
  			   multicast_to_unicast ? "enabling" : "disabling",
  			   ret, strerror(-ret), bss->ifname);
  		break;
  	}
  
  	return ret;
  }
  
  
  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 = -ENOBUFS;
  	int beacon_set;
  	int num_suites;
  	int smps_mode;
  	u32 suites[10], suite;
  	u32 ver;
  #ifdef CONFIG_MESH
  	struct wpa_driver_mesh_bss_params mesh_params;
  #endif /* CONFIG_MESH */
  
  	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;
  	else if (!drv->device_ap_sme && !drv->use_monitor &&
  		 !nl80211_get_wiphy_data_ap(bss))
  		return -ENOBUFS;
  
  	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: beacon_rate=%u", params->beacon_rate);
  	wpa_printf(MSG_DEBUG, "nl80211: rate_type=%d", params->rate_type);
  	wpa_printf(MSG_DEBUG, "nl80211: dtim_period=%d", params->dtim_period);
  	wpa_printf(MSG_DEBUG, "nl80211: ssid=%s",
  		   wpa_ssid_txt(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) ||
  	    nl80211_put_beacon_rate(msg, drv->capa.flags, params) ||
  	    nl80211_put_dtim_period(msg, 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++] = RSN_AUTH_KEY_MGMT_UNSPEC_802_1X;
  	if (params->key_mgmt_suites & WPA_KEY_MGMT_PSK)
  		suites[num_suites++] = RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X;
  	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 ||
  	     params->pairwise_ciphers & (WPA_CIPHER_WEP104 | WPA_CIPHER_WEP40)) &&
  	    (nla_put_u16(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE, ETH_P_PAE) ||
  	     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT)))
  		goto fail;
  
  	if (drv->device_ap_sme &&
  	    (params->key_mgmt_suites & WPA_KEY_MGMT_SAE) &&
  	    nla_put_flag(msg, NL80211_ATTR_EXTERNAL_AUTH_SUPPORT))
  		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_u8(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;
  	}
  
  	if (params->ftm_responder) {
  		struct nlattr *ftm;
  
  		if (!(drv->capa.flags & WPA_DRIVER_FLAGS_FTM_RESPONDER)) {
  			ret = -ENOTSUP;
  			goto fail;
  		}
  
  		ftm = nla_nest_start(msg, NL80211_ATTR_FTM_RESPONDER);
  		if (!ftm ||
  		    nla_put_flag(msg, NL80211_FTM_RESP_ATTR_ENABLED) ||
  		    (params->lci &&
  		     nla_put(msg, NL80211_FTM_RESP_ATTR_LCI,
  			     wpabuf_len(params->lci),
  			     wpabuf_head(params->lci))) ||
  		    (params->civic &&
  		     nla_put(msg, NL80211_FTM_RESP_ATTR_CIVICLOC,
  			     wpabuf_len(params->civic),
  			     wpabuf_head(params->civic))))
  			goto fail;
  		nla_nest_end(msg, ftm);
  	}
  
  	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);
  		nl80211_set_multicast_to_unicast(bss,
  						 params->multicast_to_unicast);
  		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 && params->freq) {
  			/*
  			 * 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;
  		}
  	}
  
  #ifdef CONFIG_MESH
  	if (is_mesh_interface(drv->nlmode) && params->ht_opmode != -1) {
  		os_memset(&mesh_params, 0, sizeof(mesh_params));
  		mesh_params.flags |= WPA_DRIVER_MESH_CONF_FLAG_HT_OP_MODE;
  		mesh_params.ht_opmode = params->ht_opmode;
  		ret = nl80211_set_mesh_config(priv, &mesh_params);
  		if (ret < 0)
  			return ret;
  	}
  #endif /* CONFIG_MESH */
  
  	return ret;
  fail:
  	nlmsg_free(msg);
  	return ret;
  }
  
  
  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;
  	} else {
  		wpa_printf(MSG_DEBUG, "  * channel_type=%d",
  			   NL80211_CHAN_NO_HT);
  		if (nla_put_u32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
  				NL80211_CHAN_NO_HT))
  			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_IDLE:
  		return NL80211_PLINK_LISTEN;
  	case PLINK_OPN_SNT:
  		return NL80211_PLINK_OPN_SNT;
  	case PLINK_OPN_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 (is_ap_interface(drv->nlmode) &&
  		    nla_put_u8(msg, NL80211_ATTR_STA_SUPPORT_P2P_PS,
  			       params->support_p2p_ps ?
  			       NL80211_P2P_PS_SUPPORTED :
  			       NL80211_P2P_PS_UNSUPPORTED))
  			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);
  		}
  #ifdef CONFIG_MESH
  	} else {
  		if (params->plink_state == PLINK_ESTAB && params->peer_aid) {
  			ret = nla_put_u16(msg, NL80211_ATTR_MESH_PEER_AID,
  					  params->peer_aid);
  			if (ret)
  				goto fail;
  		}
  #endif /* CONFIG_MESH */
  	}
  
  	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->set || FULL_AP_CLIENT_STATE_SUPP(drv->capa.flags)) &&
  	    (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);
  }
  
  
  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))
  			wpa_printf(MSG_DEBUG,
  				   "nl80211: Failed to subscribe for mgmt frames from SME driver - trying to run without it");
  
  	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");
  
  	nl80211_put_wiphy_data_ap(bss);
  	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 driver_nl80211_sta_set_airtime_weight(void *priv, const u8 *addr,
  						 unsigned int weight)
  {
  	struct i802_bss *bss = priv;
  	struct nl_msg *msg;
  
  	wpa_printf(MSG_DEBUG,
  		   "nl80211: Set STA airtime weight - ifname=%s addr=" MACSTR
  		   " weight=%u", bss->ifname, MAC2STR(addr), weight);
  
  	if (!(msg = nl80211_bss_msg(bss, 0, NL80211_CMD_SET_STATION)) ||
  	    nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, addr) ||
  	    nla_put_u16(msg, NL80211_ATTR_AIRTIME_WEIGHT, weight))
  		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_printf(MSG_DEBUG, "  * SSID=%s",
  		   wpa_ssid_txt(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_put_fils_connect_params(struct wpa_driver_nl80211_data *drv,
  					   struct wpa_driver_associate_params *params,
  					   struct nl_msg *msg)
  {
  	if (params->fils_erp_username_len) {
  		wpa_hexdump_ascii(MSG_DEBUG, "  * FILS ERP EMSKname/username",
  				  params->fils_erp_username,
  				  params->fils_erp_username_len);
  		if (nla_put(msg, NL80211_ATTR_FILS_ERP_USERNAME,
  			    params->fils_erp_username_len,
  			    params->fils_erp_username))
  			return -1;
  	}
  
  	if (params->fils_erp_realm_len) {
  		wpa_hexdump_ascii(MSG_DEBUG, "  * FILS ERP Realm",
  				  params->fils_erp_realm,
  				  params->fils_erp_realm_len);
  		if (nla_put(msg, NL80211_ATTR_FILS_ERP_REALM,
  			    params->fils_erp_realm_len, params->fils_erp_realm))
  			return -1;
  	}
  
  	wpa_printf(MSG_DEBUG, "  * FILS ERP next seq %u",
  		   params->fils_erp_next_seq_num);
  	if (nla_put_u16(msg, NL80211_ATTR_FILS_ERP_NEXT_SEQ_NUM,
  			params->fils_erp_next_seq_num))
  		return -1;
  
  	if (params->fils_erp_rrk_len) {
  		wpa_printf(MSG_DEBUG, "  * FILS ERP rRK (len=%lu)",
  			   (unsigned long) params->fils_erp_rrk_len);
  		if (nla_put(msg, NL80211_ATTR_FILS_ERP_RRK,
  			    params->fils_erp_rrk_len, params->fils_erp_rrk))
  			return -1;
  	}
  
  	return 0;
  }
  
  
  static int nl80211_connect_common(struct wpa_driver_nl80211_data *drv,
  				  struct wpa_driver_associate_params *params,
  				  struct nl_msg *msg)
  {
  	if (nla_put_flag(msg, NL80211_ATTR_IFACE_SOCKET_OWNER))
  		return -1;
  
  	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_printf(MSG_DEBUG, "  * SSID=%s",
  			   wpa_ssid_txt(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_SAE ||
  	    params->key_mgmt_suite == WPA_KEY_MGMT_FT_SAE ||
  	    params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X_SUITE_B ||
  	    params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X_SUITE_B_192 ||
  	    params->key_mgmt_suite == WPA_KEY_MGMT_FT_IEEE8021X_SHA384 ||
  	    params->key_mgmt_suite == WPA_KEY_MGMT_FILS_SHA256 ||
  	    params->key_mgmt_suite == WPA_KEY_MGMT_FILS_SHA384 ||
  	    params->key_mgmt_suite == WPA_KEY_MGMT_FT_FILS_SHA256 ||
  	    params->key_mgmt_suite == WPA_KEY_MGMT_FT_FILS_SHA384 ||
  	    params->key_mgmt_suite == WPA_KEY_MGMT_OWE ||
  	    params->key_mgmt_suite == WPA_KEY_MGMT_DPP) {
  		int mgmt = RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X;
  
  		switch (params->key_mgmt_suite) {
  		case WPA_KEY_MGMT_CCKM:
  			mgmt = RSN_AUTH_KEY_MGMT_CCKM;
  			break;
  		case WPA_KEY_MGMT_IEEE8021X:
  			mgmt = RSN_AUTH_KEY_MGMT_UNSPEC_802_1X;
  			break;
  		case WPA_KEY_MGMT_FT_IEEE8021X:
  			mgmt = RSN_AUTH_KEY_MGMT_FT_802_1X;
  			break;
  		case WPA_KEY_MGMT_FT_PSK:
  			mgmt = RSN_AUTH_KEY_MGMT_FT_PSK;
  			break;
  		case WPA_KEY_MGMT_IEEE8021X_SHA256:
  			mgmt = RSN_AUTH_KEY_MGMT_802_1X_SHA256;
  			break;
  		case WPA_KEY_MGMT_PSK_SHA256:
  			mgmt = RSN_AUTH_KEY_MGMT_PSK_SHA256;
  			break;
  		case WPA_KEY_MGMT_OSEN:
  			mgmt = RSN_AUTH_KEY_MGMT_OSEN;
  			break;
  		case WPA_KEY_MGMT_SAE:
  			mgmt = RSN_AUTH_KEY_MGMT_SAE;
  			break;
  		case WPA_KEY_MGMT_FT_SAE:
  			mgmt = RSN_AUTH_KEY_MGMT_FT_SAE;
  			break;
  		case WPA_KEY_MGMT_IEEE8021X_SUITE_B:
  			mgmt = RSN_AUTH_KEY_MGMT_802_1X_SUITE_B;
  			break;
  		case WPA_KEY_MGMT_IEEE8021X_SUITE_B_192:
  			mgmt = RSN_AUTH_KEY_MGMT_802_1X_SUITE_B_192;
  			break;
  		case WPA_KEY_MGMT_FT_IEEE8021X_SHA384:
  			mgmt = RSN_AUTH_KEY_MGMT_FT_802_1X_SHA384;
  			break;
  		case WPA_KEY_MGMT_FILS_SHA256:
  			mgmt = RSN_AUTH_KEY_MGMT_FILS_SHA256;
  			break;
  		case WPA_KEY_MGMT_FILS_SHA384:
  			mgmt = RSN_AUTH_KEY_MGMT_FILS_SHA384;
  			break;
  		case WPA_KEY_MGMT_FT_FILS_SHA256:
  			mgmt = RSN_AUTH_KEY_MGMT_FT_FILS_SHA256;
  			break;
  		case WPA_KEY_MGMT_FT_FILS_SHA384:
  			mgmt = RSN_AUTH_KEY_MGMT_FT_FILS_SHA384;
  			break;
  		case WPA_KEY_MGMT_OWE:
  			mgmt = RSN_AUTH_KEY_MGMT_OWE;
  			break;
  		case WPA_KEY_MGMT_DPP:
  			mgmt = RSN_AUTH_KEY_MGMT_DPP;
  			break;
  		case WPA_KEY_MGMT_PSK:
  		default:
  			mgmt = RSN_AUTH_KEY_MGMT_PSK_OVER_802_1X;
  			break;
  		}
  		wpa_printf(MSG_DEBUG, "  * akm=0x%x", mgmt);
  		if (nla_put_u32(msg, NL80211_ATTR_AKM_SUITES, mgmt))
  			return -1;
  	}
  
  	if (params->req_key_mgmt_offload &&
  	    (drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_8021X)) {
  		    wpa_printf(MSG_DEBUG, "  * WANT_1X_4WAY_HS");
  		    if (nla_put_flag(msg, NL80211_ATTR_WANT_1X_4WAY_HS))
  			    return -1;
  	    }
  
  	/* Add PSK in case of 4-way handshake offload */
  	if (params->psk &&
  	    (drv->capa.flags & WPA_DRIVER_FLAGS_4WAY_HANDSHAKE_PSK)) {
  		wpa_hexdump_key(MSG_DEBUG, "  * PSK", params->psk, 32);
  		if (nla_put(msg, NL80211_ATTR_PMK, 32, params->psk))
  			return -1;
  	}
  
  	if (nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT))
  		return -1;
  
  	if (params->key_mgmt_suite == WPA_KEY_MGMT_IEEE8021X_NO_WPA &&
  	    (params->pairwise_suite == WPA_CIPHER_NONE ||
  	     params->pairwise_suite == WPA_CIPHER_WEP104 ||
  	     params->pairwise_suite == WPA_CIPHER_WEP40) &&
  	    (nla_put_u16(msg, NL80211_ATTR_CONTROL_PORT_ETHERTYPE, ETH_P_PAE) ||
  	     nla_put_flag(msg, NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT)))
  		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)) &&
  		     !(drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_RRM)) ||
  		    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;
  	}
  
  	if ((params->auth_alg & WPA_AUTH_ALG_FILS) &&
  	    nl80211_put_fils_connect_params(drv, params, msg) != 0)
  		return -1;
  
  	if ((params->auth_alg & WPA_AUTH_ALG_SAE) &&
  	    (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) &&
  	    nla_put_flag(msg, NL80211_ATTR_EXTERNAL_AUTH_SUPPORT))
  		return -1;
  
  	return 0;
  }
  
  
  static int wpa_driver_nl80211_try_connect(
  	struct wpa_driver_nl80211_data *drv,
  	struct wpa_driver_associate_params *params,
  	struct nl_handle *nl_connect)
  {
  	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;
  
  	if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED &&
  	    nla_put_u32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED))
  		goto fail;
  
  	if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_OPTIONAL &&
  	    (drv->capa.flags & WPA_DRIVER_FLAGS_MFP_OPTIONAL) &&
  	    nla_put_u32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_OPTIONAL))
  		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 (params->auth_alg & WPA_AUTH_ALG_FILS)
  		algs++;
  	if (params->auth_alg & WPA_AUTH_ALG_FT)
  		algs++;
  	if (algs > 1) {
  		wpa_printf(MSG_DEBUG, "  * Leave out Auth Type for automatic "
  			   "selection");
  		goto skip_auth_type;
  	}
  
  	type = get_nl_auth_type(params->auth_alg);
  	wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
  	if (type == NL80211_AUTHTYPE_MAX ||
  	    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;
  
  	if (nl_connect)
  		ret = send_and_recv(drv->global, nl_connect, msg,
  				    NULL, (void *) -1);
  	else
  		ret = send_and_recv_msgs(drv, msg, NULL, (void *) -1);
  
  	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:
  	nl80211_nlmsg_clear(msg);
  	nlmsg_free(msg);
  	return ret;
  
  }
  
  
  static int wpa_driver_nl80211_connect(
  	struct wpa_driver_nl80211_data *drv,
  	struct wpa_driver_associate_params *params,
  	struct nl_handle *nl_connect)
  {
  	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, nl_connect);
  	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, nl_connect))
  			return -1;
  		ret = wpa_driver_nl80211_try_connect(drv, params, nl_connect);
  	}
  	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;
  		struct nl_handle *nl_connect = NULL;
  
  		if (wpa_driver_nl80211_set_mode(priv, nlmode) < 0)
  			return -1;
  		if (params->auth_alg & WPA_AUTH_ALG_SAE) {
  			nl_connect = bss->nl_connect;
  			bss->use_nl_connect = 1;
  		} else {
  			bss->use_nl_connect = 0;
  		}
  
  		return wpa_driver_nl80211_connect(drv, params, nl_connect);
  	}
  
  	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;
  
  	if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED &&
  	    nla_put_u32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED))
  		goto fail;
  
  	if (params->fils_kek) {
  		wpa_printf(MSG_DEBUG, "  * FILS KEK (len=%u)",
  			   (unsigned int) params->fils_kek_len);
  		if (nla_put(msg, NL80211_ATTR_FILS_KEK, params->fils_kek_len,
  			    params->fils_kek))
  			goto fail;
  	}
  	if (params->fils_nonces) {
  		wpa_hexdump(MSG_DEBUG, "  * FILS nonces (for AAD)",
  			    params->fils_nonces,
  			    params->fils_nonces_len);
  		if (nla_put(msg, NL80211_ATTR_FILS_NONCES,
  			    params->fils_nonces_len, params->fils_nonces))
  			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;
  
  	if (TEST_FAIL())
  		return -1;
  
  	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));
  	nl80211_nlmsg_clear(msg);
  	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 || rts == -1)
  		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 || frag == -1)
  		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 void get_sta_tid_stats(struct hostap_sta_driver_data *data,
  			      struct nlattr *attr)
  {
  	struct nlattr *tid_stats[NL80211_TID_STATS_MAX + 1], *tidattr;
  	struct nlattr *txq_stats[NL80211_TXQ_STATS_MAX + 1];
  	static struct nla_policy txq_stats_policy[NL80211_TXQ_STATS_MAX + 1] = {
  		[NL80211_TXQ_STATS_BACKLOG_BYTES] = { .type = NLA_U32 },
  		[NL80211_TXQ_STATS_BACKLOG_PACKETS] = { .type = NLA_U32 },
  	};
  	int rem;
  
  	nla_for_each_nested(tidattr, attr, rem) {
  		if (nla_parse_nested(tid_stats, NL80211_TID_STATS_MAX,
  				     tidattr, NULL) != 0 ||
  		    !tid_stats[NL80211_TID_STATS_TXQ_STATS] ||
  		    nla_parse_nested(txq_stats, NL80211_TXQ_STATS_MAX,
  				     tid_stats[NL80211_TID_STATS_TXQ_STATS],
  				     txq_stats_policy) != 0)
  			continue;
  		/* sum the backlogs over all TIDs for station */
  		if (txq_stats[NL80211_TXQ_STATS_BACKLOG_BYTES])
  			data->backlog_bytes += nla_get_u32(
  				txq_stats[NL80211_TXQ_STATS_BACKLOG_BYTES]);
  		if (txq_stats[NL80211_TXQ_STATS_BACKLOG_PACKETS])
  			data->backlog_bytes += nla_get_u32(
  				txq_stats[NL80211_TXQ_STATS_BACKLOG_PACKETS]);
  	}
  }
  
  
  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 },
  		[NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
  		[NL80211_STA_INFO_ACK_SIGNAL] = { .type = NLA_U8 },
  		[NL80211_STA_INFO_RX_DURATION] = { .type = NLA_U64 },
  		[NL80211_STA_INFO_TX_DURATION] = { .type = NLA_U64 },
  	};
  	struct nlattr *rate[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_BITRATE32] = { .type = NLA_U32 },
  		[NL80211_RATE_INFO_MCS] = { .type = NLA_U8 },
  		[NL80211_RATE_INFO_VHT_MCS] = { .type = NLA_U8 },
  		[NL80211_RATE_INFO_SHORT_GI] = { .type = NLA_FLAG },
  		[NL80211_RATE_INFO_VHT_NSS] = { .type = NLA_U8 },
  	};
  
  	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_RX_DURATION])
  		data->rx_airtime =
  			nla_get_u64(stats[NL80211_STA_INFO_RX_DURATION]);
  	if (stats[NL80211_STA_INFO_TX_DURATION])
  		data->tx_airtime =
  			nla_get_u64(stats[NL80211_STA_INFO_TX_DURATION]);
  	if (stats[NL80211_STA_INFO_TX_FAILED])
  		data->tx_retry_failed =
  			nla_get_u32(stats[NL80211_STA_INFO_TX_FAILED]);
  	if (stats[NL80211_STA_INFO_SIGNAL])
  		data->signal = nla_get_u8(stats[NL80211_STA_INFO_SIGNAL]);
  	if (stats[NL80211_STA_INFO_ACK_SIGNAL]) {
  		data->last_ack_rssi =
  			nla_get_u8(stats[NL80211_STA_INFO_ACK_SIGNAL]);
  		data->flags |= STA_DRV_DATA_LAST_ACK_RSSI;
  	}
  
  	if (stats[NL80211_STA_INFO_TX_BITRATE] &&
  	    nla_parse_nested(rate, NL80211_RATE_INFO_MAX,
  			     stats[NL80211_STA_INFO_TX_BITRATE],
  			     rate_policy) == 0) {
  		if (rate[NL80211_RATE_INFO_BITRATE32])
  			data->current_tx_rate =
  				nla_get_u32(rate[NL80211_RATE_INFO_BITRATE32]);
  		else if (rate[NL80211_RATE_INFO_BITRATE])
  			data->current_tx_rate =
  				nla_get_u16(rate[NL80211_RATE_INFO_BITRATE]);
  
  		if (rate[NL80211_RATE_INFO_MCS]) {
  			data->tx_mcs = nla_get_u8(rate[NL80211_RATE_INFO_MCS]);
  			data->flags |= STA_DRV_DATA_TX_MCS;
  		}
  		if (rate[NL80211_RATE_INFO_VHT_MCS]) {
  			data->tx_vhtmcs =
  				nla_get_u8(rate[NL80211_RATE_INFO_VHT_MCS]);
  			data->flags |= STA_DRV_DATA_TX_VHT_MCS;
  		}
  		if (rate[NL80211_RATE_INFO_SHORT_GI])
  			data->flags |= STA_DRV_DATA_TX_SHORT_GI;
  		if (rate[NL80211_RATE_INFO_VHT_NSS]) {
  			data->tx_vht_nss =
  				nla_get_u8(rate[NL80211_RATE_INFO_VHT_NSS]);
  			data->flags |= STA_DRV_DATA_TX_VHT_NSS;
  		}
  	}
  
  	if (stats[NL80211_STA_INFO_RX_BITRATE] &&
  	    nla_parse_nested(rate, NL80211_RATE_INFO_MAX,
  			     stats[NL80211_STA_INFO_RX_BITRATE],
  			     rate_policy) == 0) {
  		if (rate[NL80211_RATE_INFO_BITRATE32])
  			data->current_rx_rate =
  				nla_get_u32(rate[NL80211_RATE_INFO_BITRATE32]);
  		else if (rate[NL80211_RATE_INFO_BITRATE])
  			data->current_rx_rate =
  				nla_get_u16(rate[NL80211_RATE_INFO_BITRATE]);
  
  		if (rate[NL80211_RATE_INFO_MCS]) {
  			data->rx_mcs =
  				nla_get_u8(rate[NL80211_RATE_INFO_MCS]);
  			data->flags |= STA_DRV_DATA_RX_MCS;
  		}
  		if (rate[NL80211_RATE_INFO_VHT_MCS]) {
  			data->rx_vhtmcs =
  				nla_get_u8(rate[NL80211_RATE_INFO_VHT_MCS]);
  			data->flags |= STA_DRV_DATA_RX_VHT_MCS;
  		}
  		if (rate[NL80211_RATE_INFO_SHORT_GI])
  			data->flags |= STA_DRV_DATA_RX_SHORT_GI;
  		if (rate[NL80211_RATE_INFO_VHT_NSS]) {
  			data->rx_vht_nss =
  				nla_get_u8(rate[NL80211_RATE_INFO_VHT_NSS]);
  			data->flags |= STA_DRV_DATA_RX_VHT_NSS;
  		}
  	}
  
  	if (stats[NL80211_STA_INFO_TID_STATS])
  		get_sta_tid_stats(data, stats[NL80211_STA_INFO_TID_STATS]);
  
  	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;
  
  	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;
  	int res;
  
  	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);
  
  	res = send_and_recv_msgs(drv, msg, NULL, NULL);
  	wpa_printf(MSG_DEBUG,
  		   "nl80211: TX queue param set: queue=%d aifs=%d cw_min=%d cw_max=%d burst_time=%d --> res=%d",
  		   queue, aifs, cw_min, cw_max, burst_time, res);
  	if (res == 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;
  
  	os_memset(&data, 0, sizeof(data));
  	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,
  			   u16 reason)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	struct ieee80211_mgmt mgmt;
  	u8 channel;
  
  	if (ieee80211_freq_to_chan(bss->freq, &channel) ==
  	    HOSTAPD_MODE_IEEE80211AD) {
  		/* Deauthentication is not used in DMG/IEEE 802.11ad;
  		 * disassociate the STA instead. */
  		return i802_sta_disassoc(priv, own_addr, addr, reason);
  	}
  
  	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,
  			     u16 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].ifindex)
  			continue;
  		res = os_snprintf(pos, end - pos, " %d(%d)",
  				  drv->if_indices[i].ifindex,
  				  drv->if_indices[i].reason);
  		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;
  	struct drv_nl80211_if_info *old;
  
  	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].ifindex == 0) {
  			drv->if_indices[i].ifindex = ifidx;
  			drv->if_indices[i].reason = ifidx_reason;
  			dump_ifidx(drv);
  			return;
  		}
  	}
  
  	if (drv->if_indices != drv->default_if_indices)
  		old = drv->if_indices;
  	else
  		old = NULL;
  
  	drv->if_indices = os_realloc_array(old, drv->num_if_indices + 1,
  					   sizeof(*old));
  	if (!drv->if_indices) {
  		if (!old)
  			drv->if_indices = drv->default_if_indices;
  		else
  			drv->if_indices = old;
  		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));
  	drv->if_indices[drv->num_if_indices].ifindex = ifidx;
  	drv->if_indices[drv->num_if_indices].reason = 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].ifindex == ifidx ||
  		     ifidx == IFIDX_ANY) &&
  		    (drv->if_indices[i].reason == ifidx_reason ||
  		     ifidx_reason == IFIDX_ANY)) {
  			drv->if_indices[i].ifindex = 0;
  			drv->if_indices[i].reason = 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].ifindex == ifidx &&
  		    (drv->if_indices[i].reason == 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];
  	union wpa_event_data event;
  	int ret;
  
  	ret = os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
  	if (ret >= (int) sizeof(name))
  		wpa_printf(MSG_WARNING,
  			   "nl80211: WDS interface name was truncated");
  	else if (ret < 0)
  		return ret;
  
  	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;
  
  			os_memset(&event, 0, sizeof(event));
  			event.wds_sta_interface.sta_addr = addr;
  			event.wds_sta_interface.ifname = name;
  			event.wds_sta_interface.istatus = INTERFACE_ADDED;
  			wpa_supplicant_event(bss->ctx,
  					     EVENT_WDS_STA_INTERFACE_STATUS,
  					     &event);
  		}
  		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) < 0)
  			wpa_printf(MSG_INFO,
  				   "nl80211: Failed to remove interface %s from bridge %s: %s",
  				   name, bridge_ifname, strerror(errno));
  
  		i802_set_sta_vlan(priv, addr, bss->ifname, 0);
  		nl80211_remove_iface(drv, if_nametoindex(name));
  		os_memset(&event, 0, sizeof(event));
  		event.wds_sta_interface.sta_addr = addr;
  		event.wds_sta_interface.ifname = name;
  		event.wds_sta_interface.istatus = INTERFACE_REMOVED;
  		wpa_supplicant_event(bss->ctx, EVENT_WDS_STA_INTERFACE_STATUS,
  				     &event);
  		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) {
  			bss->already_in_bridge = 1;
  			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, in_br, 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 || bss->already_in_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(bss);
  		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 (os_memcmp(bss->addr, src, ETH_ALEN) != 0) {
  		wpa_printf(MSG_DEBUG, "nl80211: Use random TA " MACSTR,
  			   MAC2STR(src));
  		os_memcpy(bss->rand_addr, src, ETH_ALEN);
  	} else {
  		os_memset(bss->rand_addr, 0, 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, 0);
  		}
  		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, 0);
  
  	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(bss);
  	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(bss);
  	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)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  
  	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")) {
  		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"))
  		drv->use_monitor = 1;
  
  	if (os_strstr(param, "force_connect_cmd=1")) {
  		drv->capa.flags &= ~WPA_DRIVER_FLAGS_SME;
  		drv->force_connect_cmd = 1;
  	}
  
  	if (os_strstr(param, "force_bss_selection=1"))
  		drv->capa.flags |= WPA_DRIVER_FLAGS_BSS_SELECTION;
  
  	if (os_strstr(param, "no_offchannel_tx=1")) {
  		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, 0);
  
  	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,
  			 struct wpa_pmkid_params *params)
  {
  	struct nl_msg *msg;
  	const size_t PMK_MAX_LEN = 48; /* current cfg80211 limit */
  
  	if (!(msg = nl80211_bss_msg(bss, 0, cmd)) ||
  	    (params->pmkid &&
  	     nla_put(msg, NL80211_ATTR_PMKID, 16, params->pmkid)) ||
  	    (params->bssid &&
  	     nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid)) ||
  	    (params->ssid_len &&
  	     nla_put(msg, NL80211_ATTR_SSID, params->ssid_len, params->ssid)) ||
  	    (params->fils_cache_id &&
  	     nla_put(msg, NL80211_ATTR_FILS_CACHE_ID, 2,
  		     params->fils_cache_id)) ||
  	    (cmd != NL80211_CMD_DEL_PMKSA &&
  	     params->pmk_len && params->pmk_len <= PMK_MAX_LEN &&
  	     nla_put(msg, NL80211_ATTR_PMK, params->pmk_len, params->pmk))) {
  		nl80211_nlmsg_clear(msg);
  		nlmsg_free(msg);
  		return -ENOBUFS;
  	}
  
  	return send_and_recv_msgs(bss->drv, msg, NULL, (void *) -1);
  }
  
  
  static int nl80211_add_pmkid(void *priv, struct wpa_pmkid_params *params)
  {
  	struct i802_bss *bss = priv;
  	int ret;
  
  	if (params->bssid)
  		wpa_printf(MSG_DEBUG, "nl80211: Add PMKID for " MACSTR,
  			   MAC2STR(params->bssid));
  	else if (params->fils_cache_id && params->ssid_len) {
  		wpa_printf(MSG_DEBUG,
  			   "nl80211: Add PMKSA for cache id %02x%02x SSID %s",
  			   params->fils_cache_id[0], params->fils_cache_id[1],
  			   wpa_ssid_txt(params->ssid, params->ssid_len));
  	}
  
  	ret = nl80211_pmkid(bss, NL80211_CMD_SET_PMKSA, params);
  	if (ret < 0) {
  		wpa_printf(MSG_DEBUG,
  			   "nl80211: NL80211_CMD_SET_PMKSA failed: %d (%s)",
  			   ret, strerror(-ret));
  	}
  
  	return ret;
  }
  
  
  static int nl80211_remove_pmkid(void *priv, struct wpa_pmkid_params *params)
  {
  	struct i802_bss *bss = priv;
  	int ret;
  
  	if (params->bssid)
  		wpa_printf(MSG_DEBUG, "nl80211: Delete PMKID for " MACSTR,
  			   MAC2STR(params->bssid));
  	else if (params->fils_cache_id && params->ssid_len) {
  		wpa_printf(MSG_DEBUG,
  			   "nl80211: Delete PMKSA for cache id %02x%02x SSID %s",
  			   params->fils_cache_id[0], params->fils_cache_id[1],
  			   wpa_ssid_txt(params->ssid, params->ssid_len));
  	}
  
  	ret = nl80211_pmkid(bss, NL80211_CMD_DEL_PMKSA, params);
  	if (ret < 0) {
  		wpa_printf(MSG_DEBUG,
  			   "nl80211: NL80211_CMD_DEL_PMKSA failed: %d (%s)",
  			   ret, strerror(-ret));
  	}
  
  	return ret;
  }
  
  
  static int nl80211_flush_pmkid(void *priv)
  {
  	struct i802_bss *bss = priv;
  	struct nl_msg *msg;
  
  	wpa_printf(MSG_DEBUG, "nl80211: Flush PMKIDs");
  	msg = nl80211_bss_msg(bss, 0, NL80211_CMD_FLUSH_PMKSA);
  	if (!msg)
  		return -ENOBUFS;
  	return send_and_recv_msgs(bss->drv, msg, 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) ||
  	    (kck_len && 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;
  	u64 cookie;
  	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, cookie_handler, &cookie);
  	if (ret < 0) {
  		wpa_printf(MSG_DEBUG, "nl80211: Client probe request for "
  			   MACSTR " failed: ret=%d (%s)",
  			   MAC2STR(addr), ret, strerror(-ret));
  	} else {
  		wpa_printf(MSG_DEBUG,
  			   "nl80211: Client probe request addr=" MACSTR
  			   " cookie=%llu", MAC2STR(addr),
  			   (long long unsigned int) cookie);
  	}
  }
  
  
  static int nl80211_set_power_save(struct i802_bss *bss, int enabled)
  {
  	struct nl_msg *msg;
  	int ret;
  
  	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;
  	}
  
  	ret = send_and_recv_msgs(bss->drv, msg, NULL, NULL);
  	if (ret < 0) {
  		wpa_printf(MSG_DEBUG,
  			   "nl80211: Setting PS state %s failed: %d (%s)",
  			   enabled ? "enabled" : "disabled",
  			   ret, strerror(-ret));
  	}
  	return ret;
  }
  
  
  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;
  	int res;
  
  	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;
  	}
  
  	res = send_and_recv_msgs(drv, msg, NULL, NULL);
  	wpa_printf(MSG_DEBUG, "nl80211: TDLS_OPER: oper=%d mac=" MACSTR
  		   " --> res=%d (%s)", nl80211_oper, MAC2STR(peer), res,
  		   strerror(-res));
  	return res;
  }
  
  
  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,
  					 u16 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;
  
  	os_memset(data, 0, sizeof(*data));
  	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;
  }
  
  
  static 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;
  	struct nl_msg *msg;
  	char alpha2[3] = { 0, 0, 0 };
  
  	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%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->already_in_bridge ? "already_in_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;
  	}
  
  	msg = nlmsg_alloc();
  	if (msg &&
  	    nl80211_cmd(drv, msg, 0, NL80211_CMD_GET_REG) &&
  	    nla_put_u32(msg, NL80211_ATTR_WIPHY, drv->wiphy_idx) == 0) {
  		if (send_and_recv_msgs(drv, msg, nl80211_get_country,
  				       alpha2) == 0 &&
  		    alpha2[0]) {
  			res = os_snprintf(pos, end - pos, "country=%s\n",
  					  alpha2);
  			if (os_snprintf_error(end - pos, res))
  				return pos - buf;
  			pos += res;
  		}
  	} else {
  		nlmsg_free(msg);
  	}
  
  	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 &&
  	    drv->nlmode != NL80211_IFTYPE_MESH_POINT)
  		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);
  }
  
  
  static int nl80211_disable_fils(void *priv, int disable)
  {
  	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: Disable FILS=%d", disable);
  
  	if (!drv->set_wifi_conf_vendor_cmd_avail)
  		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_SET_WIFI_CONFIGURATION) ||
  	    !(params = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA)) ||
  	    nla_put_u8(msg, QCA_WLAN_VENDOR_ATTR_CONFIG_DISABLE_FILS,
  		       disable)) {
  		nlmsg_free(msg);
  		return -1;
  	}
  	nla_nest_end(msg, params);
  
  	return send_and_recv_msgs(drv, msg, NULL, NULL);
  }
  
  
  /* Reserved QCA_WLAN_VENDOR_ATTR_ROAMING_REQ_ID value for wpa_supplicant */
  #define WPA_SUPPLICANT_CLIENT_ID 1
  
  static int nl80211_set_bssid_blacklist(void *priv, unsigned int num_bssid,
  				       const u8 *bssid)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	struct nl_msg *msg;
  	struct nlattr *params, *nlbssids, *attr;
  	unsigned int i;
  
  	wpa_printf(MSG_DEBUG, "nl80211: Set blacklist BSSID (num=%u)",
  		   num_bssid);
  
  	if (!drv->roam_vendor_cmd_avail)
  		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_ROAM) ||
  	    !(params = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA)) ||
  	    nla_put_u32(msg, QCA_WLAN_VENDOR_ATTR_ROAMING_SUBCMD,
  			QCA_WLAN_VENDOR_ATTR_ROAM_SUBCMD_SET_BLACKLIST_BSSID) ||
  	    nla_put_u32(msg, QCA_WLAN_VENDOR_ATTR_ROAMING_REQ_ID,
  			WPA_SUPPLICANT_CLIENT_ID) ||
  	    nla_put_u32(msg,
  			QCA_WLAN_VENDOR_ATTR_ROAMING_PARAM_SET_BSSID_PARAMS_NUM_BSSID,
  			num_bssid))
  		goto fail;
  
  	nlbssids = nla_nest_start(
  		msg, QCA_WLAN_VENDOR_ATTR_ROAMING_PARAM_SET_BSSID_PARAMS);
  	if (!nlbssids)
  		goto fail;
  
  	for (i = 0; i < num_bssid; i++) {
  		attr = nla_nest_start(msg, i);
  		if (!attr)
  			goto fail;
  		if (nla_put(msg,
  			    QCA_WLAN_VENDOR_ATTR_ROAMING_PARAM_SET_BSSID_PARAMS_BSSID,
  			    ETH_ALEN, &bssid[i * ETH_ALEN]))
  			goto fail;
  		wpa_printf(MSG_DEBUG, "nl80211:   BSSID[%u]: " MACSTR, i,
  			   MAC2STR(&bssid[i * ETH_ALEN]));
  		nla_nest_end(msg, attr);
  	}
  	nla_nest_end(msg, nlbssids);
  	nla_nest_end(msg, params);
  
  	return send_and_recv_msgs(drv, msg, NULL, NULL);
  
  fail:
  	nlmsg_free(msg);
  	return -1;
  }
  
  #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 (TEST_FAIL())
  		return -1;
  
  	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_printf(MSG_DEBUG, "  * Mesh ID (SSID)=%s",
  			   wpa_ssid_txt(mesh_id, mesh_id_len));
  		return nla_put(msg, NL80211_ATTR_MESH_ID, mesh_id_len, mesh_id);
  	}
  
  	return 0;
  }
  
  
  static int nl80211_put_mesh_config(struct nl_msg *msg,
  				   struct wpa_driver_mesh_bss_params *params)
  {
  	struct nlattr *container;
  
  	container = nla_nest_start(msg, NL80211_ATTR_MESH_CONFIG);
  	if (!container)
  		return -1;
  
  	if (((params->flags & WPA_DRIVER_MESH_CONF_FLAG_AUTO_PLINKS) &&
  	     nla_put_u8(msg, NL80211_MESHCONF_AUTO_OPEN_PLINKS,
  			params->auto_plinks)) ||
  	    ((params->flags & WPA_DRIVER_MESH_CONF_FLAG_MAX_PEER_LINKS) &&
  	     nla_put_u16(msg, NL80211_MESHCONF_MAX_PEER_LINKS,
  			 params->max_peer_links)) ||
  	    ((params->flags & WPA_DRIVER_MESH_CONF_FLAG_RSSI_THRESHOLD) &&
  	     nla_put_u32(msg, NL80211_MESHCONF_RSSI_THRESHOLD,
  			 params->rssi_threshold)))
  		return -1;
  
  	/*
  	 * Set NL80211_MESHCONF_PLINK_TIMEOUT even if user mpm is used because
  	 * the timer could disconnect stations even in that case.
  	 */
  	if ((params->flags & WPA_DRIVER_MESH_CONF_FLAG_PEER_LINK_TIMEOUT) &&
  	    nla_put_u32(msg, NL80211_MESHCONF_PLINK_TIMEOUT,
  			params->peer_link_timeout)) {
  		wpa_printf(MSG_ERROR, "nl80211: Failed to set PLINK_TIMEOUT");
  		return -1;
  	}
  
  	if ((params->flags & WPA_DRIVER_MESH_CONF_FLAG_HT_OP_MODE) &&
  	    nla_put_u16(msg, NL80211_MESHCONF_HT_OPMODE, params->ht_opmode)) {
  		wpa_printf(MSG_ERROR, "nl80211: Failed to set HT_OP_MODE");
  		return -1;
  	}
  
  	nla_nest_end(msg, container);
  
  	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) ||
  	    nl80211_put_dtim_period(msg, params->dtim_period))
  		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);
  
  	params->conf.flags |= WPA_DRIVER_MESH_CONF_FLAG_AUTO_PLINKS;
  	params->conf.flags |= WPA_DRIVER_MESH_CONF_FLAG_PEER_LINK_TIMEOUT;
  	params->conf.flags |= WPA_DRIVER_MESH_CONF_FLAG_MAX_PEER_LINKS;
  	if (nl80211_put_mesh_config(msg, &params->conf) < 0)
  		goto fail;
  
  	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;
  	drv->assoc_freq = 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;
  }
  
  
  static int nl80211_p2p_lo_start(void *priv, unsigned int freq,
  				unsigned int period, unsigned int interval,
  				unsigned int count, const u8 *device_types,
  				size_t dev_types_len,
  				const u8 *ies, size_t ies_len)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	struct nl_msg *msg;
  	struct nlattr *container;
  	int ret;
  
  	wpa_printf(MSG_DEBUG,
  		   "nl80211: Start P2P Listen offload: freq=%u, period=%u, interval=%u, count=%u",
  		   freq, period, interval, count);
  
  	if (!(drv->capa.flags & WPA_DRIVER_FLAGS_P2P_LISTEN_OFFLOAD))
  		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_P2P_LISTEN_OFFLOAD_START))
  		goto fail;
  
  	container = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
  	if (!container)
  		goto fail;
  
  	if (nla_put_u32(msg, QCA_WLAN_VENDOR_ATTR_P2P_LISTEN_OFFLOAD_CHANNEL,
  			freq) ||
  	    nla_put_u32(msg, QCA_WLAN_VENDOR_ATTR_P2P_LISTEN_OFFLOAD_PERIOD,
  			period) ||
  	    nla_put_u32(msg, QCA_WLAN_VENDOR_ATTR_P2P_LISTEN_OFFLOAD_INTERVAL,
  			interval) ||
  	    nla_put_u32(msg, QCA_WLAN_VENDOR_ATTR_P2P_LISTEN_OFFLOAD_COUNT,
  			count) ||
  	    nla_put(msg, QCA_WLAN_VENDOR_ATTR_P2P_LISTEN_OFFLOAD_DEVICE_TYPES,
  		    dev_types_len, device_types) ||
  	    nla_put(msg, QCA_WLAN_VENDOR_ATTR_P2P_LISTEN_OFFLOAD_VENDOR_IE,
  		    ies_len, ies))
  		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: Failed to send P2P Listen offload vendor command");
  		goto fail;
  	}
  
  	return 0;
  
  fail:
  	nlmsg_free(msg);
  	return -1;
  }
  
  
  static int nl80211_p2p_lo_stop(void *priv)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	struct nl_msg *msg;
  
  	wpa_printf(MSG_DEBUG, "nl80211: Stop P2P Listen offload");
  
  	if (!(drv->capa.flags & WPA_DRIVER_FLAGS_P2P_LISTEN_OFFLOAD))
  		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_P2P_LISTEN_OFFLOAD_STOP)) {
  		nlmsg_free(msg);
  		return -1;
  	}
  
  	return send_and_recv_msgs(drv, msg, NULL, NULL);
  }
  
  
  static int nl80211_set_tdls_mode(void *priv, int tdls_external_control)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	struct nl_msg *msg;
  	struct nlattr *params;
  	int ret;
  	u32 tdls_mode;
  
  	wpa_printf(MSG_DEBUG,
  		   "nl80211: Set TDKS mode: tdls_external_control=%d",
  		   tdls_external_control);
  
  	if (tdls_external_control == 1)
  		tdls_mode = QCA_WLAN_VENDOR_TDLS_TRIGGER_MODE_IMPLICIT |
  			QCA_WLAN_VENDOR_TDLS_TRIGGER_MODE_EXTERNAL;
  	else
  		tdls_mode = QCA_WLAN_VENDOR_TDLS_TRIGGER_MODE_EXPLICIT;
  
  	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_CONFIGURE_TDLS))
  		goto fail;
  
  	params = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
  	if (!params)
  		goto fail;
  
  	if (nla_put_u32(msg, QCA_WLAN_VENDOR_ATTR_TDLS_CONFIG_TRIGGER_MODE,
  			tdls_mode))
  		goto fail;
  
  	nla_nest_end(msg, params);
  
  	ret = send_and_recv_msgs(drv, msg, NULL, NULL);
  	msg = NULL;
  	if (ret) {
  		wpa_printf(MSG_ERROR,
  			   "nl80211: Set TDLS mode failed: ret=%d (%s)",
  			   ret, strerror(-ret));
  		goto fail;
  	}
  	return 0;
  fail:
  	nlmsg_free(msg);
  	return -1;
  }
  
  
  #ifdef CONFIG_MBO
  
  static enum mbo_transition_reject_reason
  nl80211_mbo_reject_reason_mapping(enum qca_wlan_btm_candidate_status status)
  {
  	switch (status) {
  	case QCA_STATUS_REJECT_EXCESSIVE_FRAME_LOSS_EXPECTED:
  		return MBO_TRANSITION_REJECT_REASON_FRAME_LOSS;
  	case QCA_STATUS_REJECT_EXCESSIVE_DELAY_EXPECTED:
  		return MBO_TRANSITION_REJECT_REASON_DELAY;
  	case QCA_STATUS_REJECT_INSUFFICIENT_QOS_CAPACITY:
  		return MBO_TRANSITION_REJECT_REASON_QOS_CAPACITY;
  	case QCA_STATUS_REJECT_LOW_RSSI:
  		return MBO_TRANSITION_REJECT_REASON_RSSI;
  	case QCA_STATUS_REJECT_HIGH_INTERFERENCE:
  		return MBO_TRANSITION_REJECT_REASON_INTERFERENCE;
  	case QCA_STATUS_REJECT_UNKNOWN:
  	default:
  		return MBO_TRANSITION_REJECT_REASON_UNSPECIFIED;
  	}
  }
  
  
  static void nl80211_parse_btm_candidate_info(struct candidate_list *candidate,
  					     struct nlattr *tb[], int num)
  {
  	enum qca_wlan_btm_candidate_status status;
  	char buf[50];
  
  	os_memcpy(candidate->bssid,
  		  nla_data(tb[QCA_WLAN_VENDOR_ATTR_BTM_CANDIDATE_INFO_BSSID]),
  		  ETH_ALEN);
  
  	status = nla_get_u32(
  		tb[QCA_WLAN_VENDOR_ATTR_BTM_CANDIDATE_INFO_STATUS]);
  	candidate->is_accept = status == QCA_STATUS_ACCEPT;
  	candidate->reject_reason = nl80211_mbo_reject_reason_mapping(status);
  
  	if (candidate->is_accept)
  		os_snprintf(buf, sizeof(buf), "Accepted");
  	else
  		os_snprintf(buf, sizeof(buf),
  			    "Rejected, Reject_reason: %d",
  			    candidate->reject_reason);
  	wpa_printf(MSG_DEBUG, "nl80211:   BSSID[%d]: " MACSTR " %s",
  		   num, MAC2STR(candidate->bssid), buf);
  }
  
  
  static int
  nl80211_get_bss_transition_status_handler(struct nl_msg *msg, void *arg)
  {
  	struct wpa_bss_candidate_info *info = arg;
  	struct candidate_list *candidate = info->candidates;
  	struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
  	struct nlattr *tb_vendor[QCA_WLAN_VENDOR_ATTR_MAX + 1];
  	struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_BTM_CANDIDATE_INFO_MAX + 1];
  	static struct nla_policy policy[
  		QCA_WLAN_VENDOR_ATTR_BTM_CANDIDATE_INFO_MAX + 1] = {
  		[QCA_WLAN_VENDOR_ATTR_BTM_CANDIDATE_INFO_BSSID] = {
  			.minlen = ETH_ALEN
  		},
  		[QCA_WLAN_VENDOR_ATTR_BTM_CANDIDATE_INFO_STATUS] = {
  			.type = NLA_U32,
  		},
  	};
  	struct nlattr *attr;
  	int rem;
  	struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
  	u8 num;
  
  	num = info->num; /* number of candidates sent to driver */
  	info->num = 0;
  	nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
  		  genlmsg_attrlen(gnlh, 0), NULL);
  
  	if (!tb_msg[NL80211_ATTR_VENDOR_DATA] ||
  	    nla_parse_nested(tb_vendor, QCA_WLAN_VENDOR_ATTR_MAX,
  			     tb_msg[NL80211_ATTR_VENDOR_DATA], NULL) ||
  	    !tb_vendor[QCA_WLAN_VENDOR_ATTR_BTM_CANDIDATE_INFO])
  		return NL_SKIP;
  
  	wpa_printf(MSG_DEBUG,
  		   "nl80211: WNM Candidate list received from driver");
  	nla_for_each_nested(attr,
  			    tb_vendor[QCA_WLAN_VENDOR_ATTR_BTM_CANDIDATE_INFO],
  			    rem) {
  		if (info->num >= num ||
  		    nla_parse_nested(
  			    tb, QCA_WLAN_VENDOR_ATTR_BTM_CANDIDATE_INFO_MAX,
  			    attr, policy) ||
  		    !tb[QCA_WLAN_VENDOR_ATTR_BTM_CANDIDATE_INFO_BSSID] ||
  		    !tb[QCA_WLAN_VENDOR_ATTR_BTM_CANDIDATE_INFO_STATUS])
  			break;
  
  		nl80211_parse_btm_candidate_info(candidate, tb, info->num);
  
  		candidate++;
  		info->num++;
  	}
  
  	return NL_SKIP;
  }
  
  
  static struct wpa_bss_candidate_info *
  nl80211_get_bss_transition_status(void *priv, struct wpa_bss_trans_info *params)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	struct nl_msg *msg;
  	struct nlattr *attr, *attr1, *attr2;
  	struct wpa_bss_candidate_info *info;
  	u8 i;
  	int ret;
  	u8 *pos;
  
  	if (!drv->fetch_bss_trans_status)
  		return NULL;
  
  	info = os_zalloc(sizeof(*info));
  	if (!info)
  		return NULL;
  	/* Allocate memory for number of candidates sent to driver */
  	info->candidates = os_calloc(params->n_candidates,
  				     sizeof(*info->candidates));
  	if (!info->candidates) {
  		os_free(info);
  		return NULL;
  	}
  
  	/* Copy the number of candidates being sent to driver. This is used in
  	 * nl80211_get_bss_transition_status_handler() to limit the number of
  	 * candidates that can be populated in info->candidates and will be
  	 * later overwritten with the actual number of candidates received from
  	 * the driver.
  	 */
  	info->num = params->n_candidates;
  
  	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_FETCH_BSS_TRANSITION_STATUS))
  		goto fail;
  
  	attr = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
  	if (!attr)
  		goto fail;
  
  	if (nla_put_u8(msg, QCA_WLAN_VENDOR_ATTR_BTM_MBO_TRANSITION_REASON,
  		       params->mbo_transition_reason))
  		goto fail;
  
  	attr1 = nla_nest_start(msg, QCA_WLAN_VENDOR_ATTR_BTM_CANDIDATE_INFO);
  	if (!attr1)
  		goto fail;
  
  	wpa_printf(MSG_DEBUG,
  		   "nl80211: WNM Candidate list info sending to driver: mbo_transition_reason: %d n_candidates: %d",
  		   params->mbo_transition_reason, params->n_candidates);
  	pos = params->bssid;
  	for (i = 0; i < params->n_candidates; i++) {
  		wpa_printf(MSG_DEBUG, "nl80211:   BSSID[%d]: " MACSTR, i,
  			   MAC2STR(pos));
  		attr2 = nla_nest_start(msg, i);
  		if (!attr2 ||
  		    nla_put(msg, QCA_WLAN_VENDOR_ATTR_BTM_CANDIDATE_INFO_BSSID,
  			    ETH_ALEN, pos))
  			goto fail;
  		pos += ETH_ALEN;
  		nla_nest_end(msg, attr2);
  	}
  
  	nla_nest_end(msg, attr1);
  	nla_nest_end(msg, attr);
  
  	ret = send_and_recv_msgs(drv, msg,
  				 nl80211_get_bss_transition_status_handler,
  				 info);
  	msg = NULL;
  	if (ret) {
  		wpa_printf(MSG_ERROR,
  			   "nl80211: WNM Get BSS transition status failed: ret=%d (%s)",
  			   ret, strerror(-ret));
  		goto fail;
  	}
  	return info;
  
  fail:
  	nlmsg_free(msg);
  	os_free(info->candidates);
  	os_free(info);
  	return NULL;
  }
  
  
  /**
   * nl80211_ignore_assoc_disallow - Configure driver to ignore assoc_disallow
   * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
   * @ignore_assoc_disallow: 0 to not ignore, 1 to ignore
   * Returns: 0 on success, -1 on failure
   */
  static int nl80211_ignore_assoc_disallow(void *priv, int ignore_disallow)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	struct nl_msg *msg;
  	struct nlattr *attr;
  	int ret = -1;
  
  	if (!drv->set_wifi_conf_vendor_cmd_avail)
  		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_SET_WIFI_CONFIGURATION))
  		goto fail;
  
  	attr = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA);
  	if (!attr)
  		goto fail;
  
  	wpa_printf(MSG_DEBUG, "nl80211: Set ignore_assoc_disallow %d",
  		   ignore_disallow);
  	if (nla_put_u8(msg, QCA_WLAN_VENDOR_ATTR_CONFIG_IGNORE_ASSOC_DISALLOWED,
  		       ignore_disallow))
  		goto fail;
  
  	nla_nest_end(msg, attr);
  
  	ret = send_and_recv_msgs(drv, msg, NULL, NULL);
  	msg = NULL;
  	if (ret) {
  		wpa_printf(MSG_ERROR,
  			   "nl80211: Set ignore_assoc_disallow failed: ret=%d (%s)",
  			   ret, strerror(-ret));
  		goto fail;
  	}
  
  fail:
  	nlmsg_free(msg);
  	return ret;
  }
  
  #endif /* CONFIG_MBO */
  
  #endif /* CONFIG_DRIVER_NL80211_QCA */
  
  
  static int nl80211_write_to_file(const char *name, unsigned int val)
  {
  	int fd, len;
  	char tmp[128];
  
  	fd = open(name, O_RDWR);
  	if (fd < 0) {
  		wpa_printf(MSG_ERROR, "nl80211: Failed to open %s: %s",
  			   name, strerror(errno));
  		return fd;
  	}
  
  	len = os_snprintf(tmp, sizeof(tmp), "%u\n", val);
  	len = write(fd, tmp, len);
  	if (len < 0)
  		wpa_printf(MSG_ERROR, "nl80211: Failed to write to %s: %s",
  			   name, strerror(errno));
  	close(fd);
  
  	return 0;
  }
  
  
  static int nl80211_configure_data_frame_filters(void *priv, u32 filter_flags)
  {
  	struct i802_bss *bss = priv;
  	char path[128];
  	int ret;
  
  	wpa_printf(MSG_DEBUG, "nl80211: Data frame filter flags=0x%x",
  		   filter_flags);
  
  	/* Configure filtering of unicast frame encrypted using GTK */
  	ret = os_snprintf(path, sizeof(path),
  			  "/proc/sys/net/ipv4/conf/%s/drop_unicast_in_l2_multicast",
  			  bss->ifname);
  	if (os_snprintf_error(sizeof(path), ret))
  		return -1;
  
  	ret = nl80211_write_to_file(path,
  				    !!(filter_flags &
  				       WPA_DATA_FRAME_FILTER_FLAG_GTK));
  	if (ret) {
  		wpa_printf(MSG_ERROR,
  			   "nl80211: Failed to set IPv4 unicast in multicast filter");
  		return ret;
  	}
  
  	os_snprintf(path, sizeof(path),
  		    "/proc/sys/net/ipv6/conf/%s/drop_unicast_in_l2_multicast",
  		    bss->ifname);
  	ret = nl80211_write_to_file(path,
  				    !!(filter_flags &
  				       WPA_DATA_FRAME_FILTER_FLAG_GTK));
  
  	if (ret) {
  		wpa_printf(MSG_ERROR,
  			   "nl80211: Failed to set IPv6 unicast in multicast filter");
  		return ret;
  	}
  
  	/* Configure filtering of unicast frame encrypted using GTK */
  	os_snprintf(path, sizeof(path),
  		    "/proc/sys/net/ipv4/conf/%s/drop_gratuitous_arp",
  		    bss->ifname);
  	ret = nl80211_write_to_file(path,
  				    !!(filter_flags &
  				       WPA_DATA_FRAME_FILTER_FLAG_ARP));
  	if (ret) {
  		wpa_printf(MSG_ERROR,
  			   "nl80211: Failed set gratuitous ARP filter");
  		return ret;
  	}
  
  	/* Configure filtering of IPv6 NA frames */
  	os_snprintf(path, sizeof(path),
  		    "/proc/sys/net/ipv6/conf/%s/drop_unsolicited_na",
  		    bss->ifname);
  	ret = nl80211_write_to_file(path,
  				    !!(filter_flags &
  				       WPA_DATA_FRAME_FILTER_FLAG_NA));
  	if (ret) {
  		wpa_printf(MSG_ERROR,
  			   "nl80211: Failed to set unsolicited NA filter");
  		return ret;
  	}
  
  	return 0;
  }
  
  
  static int nl80211_get_ext_capab(void *priv, enum wpa_driver_if_type type,
  				 const u8 **ext_capa, const u8 **ext_capa_mask,
  				 unsigned int *ext_capa_len)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	enum nl80211_iftype nlmode;
  	unsigned int i;
  
  	if (!ext_capa || !ext_capa_mask || !ext_capa_len)
  		return -1;
  
  	nlmode = wpa_driver_nl80211_if_type(type);
  
  	/* By default, use the per-radio values */
  	*ext_capa = drv->extended_capa;
  	*ext_capa_mask = drv->extended_capa_mask;
  	*ext_capa_len = drv->extended_capa_len;
  
  	/* Replace the default value if a per-interface type value exists */
  	for (i = 0; i < drv->num_iface_ext_capa; i++) {
  		if (nlmode == drv->iface_ext_capa[i].iftype) {
  			*ext_capa = drv->iface_ext_capa[i].ext_capa;
  			*ext_capa_mask = drv->iface_ext_capa[i].ext_capa_mask;
  			*ext_capa_len = drv->iface_ext_capa[i].ext_capa_len;
  			break;
  		}
  	}
  
  	return 0;
  }
  
  
  static int nl80211_update_connection_params(
  	void *priv, struct wpa_driver_associate_params *params,
  	enum wpa_drv_update_connect_params_mask mask)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	struct nl_msg *msg;
  	int ret = -1;
  	enum nl80211_auth_type type;
  
  	msg = nl80211_drv_msg(drv, 0, NL80211_CMD_UPDATE_CONNECT_PARAMS);
  	if (!msg)
  		goto fail;
  
  	wpa_printf(MSG_DEBUG, "nl80211: Update connection params (ifindex=%d)",
  		   drv->ifindex);
  
  	if ((mask & WPA_DRV_UPDATE_ASSOC_IES) && params->wpa_ie) {
  		if (nla_put(msg, NL80211_ATTR_IE, params->wpa_ie_len,
  			    params->wpa_ie))
  			goto fail;
  		wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie,
  			    params->wpa_ie_len);
  	}
  
  	if (mask & WPA_DRV_UPDATE_AUTH_TYPE) {
  		type = get_nl_auth_type(params->auth_alg);
  		if (type == NL80211_AUTHTYPE_MAX ||
  		    nla_put_u32(msg, NL80211_ATTR_AUTH_TYPE, type))
  			goto fail;
  		wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
  	}
  
  	if ((mask & WPA_DRV_UPDATE_FILS_ERP_INFO) &&
  	    nl80211_put_fils_connect_params(drv, params, msg))
  		goto fail;
  
  	ret = send_and_recv_msgs(drv, msg, NULL, NULL);
  	msg = NULL;
  	if (ret)
  		wpa_dbg(drv->ctx, MSG_DEBUG,
  			"nl80211: Update connect params command failed: ret=%d (%s)",
  			ret, strerror(-ret));
  
  fail:
  	nlmsg_free(msg);
  	return ret;
  }
  
  
  static int nl80211_send_external_auth_status(void *priv,
  					     struct external_auth *params)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	struct nl_msg *msg = NULL;
  	int ret = -1;
  
  	/* External auth command/status is intended for drivers that implement
  	 * intenral SME but want to offload authentication processing (e.g.,
  	 * SAE) to hostapd/wpa_supplicant. Do nott send the status to drivers
  	 * which do not support AP SME or use wpa_supplicant/hostapd SME.
  	 */
  	if (!bss->drv->device_ap_sme ||
  	    (drv->capa.flags & WPA_DRIVER_FLAGS_SME))
  		return -1;
  
  	wpa_dbg(drv->ctx, MSG_DEBUG,
  		"nl80211: External auth status: %u", params->status);
  
  	msg = nl80211_drv_msg(drv, 0, NL80211_CMD_EXTERNAL_AUTH);
  	if (!msg ||
  	    nla_put_u16(msg, NL80211_ATTR_STATUS_CODE, params->status) ||
  	    (params->ssid && params->ssid_len &&
  	     nla_put(msg, NL80211_ATTR_SSID, params->ssid_len, params->ssid)) ||
  	    (params->pmkid &&
  	     nla_put(msg, NL80211_ATTR_PMKID, PMKID_LEN, params->pmkid)) ||
  	    (params->bssid &&
  	     nla_put(msg, NL80211_ATTR_BSSID, ETH_ALEN, params->bssid)))
  		goto fail;
  	ret = send_and_recv_msgs(drv, msg, NULL, NULL);
  	msg = NULL;
  	if (ret) {
  		wpa_printf(MSG_DEBUG,
  			   "nl80211: External Auth status update failed: ret=%d (%s)",
  			   ret, strerror(-ret));
  		goto fail;
  	}
  fail:
  	nlmsg_free(msg);
  	return ret;
  }
  
  
  static int nl80211_set_4addr_mode(void *priv, const char *bridge_ifname,
  				  int val)
  {
  	struct i802_bss *bss = priv;
  	struct wpa_driver_nl80211_data *drv = bss->drv;
  	struct nl_msg *msg;
  	int ret = -ENOBUFS;
  
  	wpa_printf(MSG_DEBUG, "nl80211: %s 4addr mode (bridge_ifname: %s)",
  		   val ? "Enable" : "Disable", bridge_ifname);
  
  	msg = nl80211_cmd_msg(drv->first_bss, 0, NL80211_CMD_SET_INTERFACE);
  	if (!msg || nla_put_u8(msg, NL80211_ATTR_4ADDR, val))
  		goto fail;
  
  	if (bridge_ifname[0] && bss->added_if_into_bridge && !val) {
  		if (linux_br_del_if(drv->global->ioctl_sock,
  				    bridge_ifname, bss->ifname)) {
  			wpa_printf(MSG_ERROR,
  				   "nl80211: Failed to remove interface %s from bridge %s",
  				   bss->ifname, bridge_ifname);
  			return -1;
  		}
  		bss->added_if_into_bridge = 0;
  	}
  
  	ret = send_and_recv_msgs(drv, msg, NULL, NULL);
  	msg = NULL;
  	if (!ret) {
  		if (bridge_ifname[0] && val &&
  		    i802_check_bridge(drv, bss, bridge_ifname, bss->ifname) < 0)
  			return -1;
  		return 0;
  	}
  
  fail:
  	nlmsg_free(msg);
  	wpa_printf(MSG_ERROR, "nl80211: Failed to enable/disable 4addr");
  
  	return ret;
  }
  
  
  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,
  	.sta_set_airtime_weight = driver_nl80211_sta_set_airtime_weight,
  	.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,
  	.channel_info = nl80211_channel_info,
  	.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,
  	.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
  	.roaming = nl80211_roaming,
  	.disable_fils = nl80211_disable_fils,
  	.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,
  	.p2p_lo_start = nl80211_p2p_lo_start,
  	.p2p_lo_stop = nl80211_p2p_lo_stop,
  	.set_default_scan_ies = nl80211_set_default_scan_ies,
  	.set_tdls_mode = nl80211_set_tdls_mode,
  #ifdef CONFIG_MBO
  	.get_bss_transition_status = nl80211_get_bss_transition_status,
  	.ignore_assoc_disallow = nl80211_ignore_assoc_disallow,
  #endif /* CONFIG_MBO */
  	.set_bssid_blacklist = nl80211_set_bssid_blacklist,
  #endif /* CONFIG_DRIVER_NL80211_QCA */
  	.configure_data_frame_filters = nl80211_configure_data_frame_filters,
  	.get_ext_capab = nl80211_get_ext_capab,
  	.update_connect_params = nl80211_update_connection_params,
  	.send_external_auth_status = nl80211_send_external_auth_status,
  	.set_4addr_mode = nl80211_set_4addr_mode,
  };
  