void cfg80211_report_obss_beacon(struct wiphy *wiphy,
				 const u8 *frame, size_t len,
				 int freq, int sig_dbm)
{
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
	struct sk_buff *msg;
	void *hdr;
	struct cfg80211_beacon_registration *reg;

	trace_cfg80211_report_obss_beacon(wiphy, frame, len, freq, sig_dbm);

	spin_lock_bh(&rdev->beacon_registrations_lock);
	list_for_each_entry(reg, &rdev->beacon_registrations, list) {
		msg = nlmsg_new(len + 100, GFP_ATOMIC);
		if (!msg) {
			spin_unlock_bh(&rdev->beacon_registrations_lock);
			return;
		}

		hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_FRAME);
		if (!hdr)
			goto nla_put_failure;

		if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
		    (freq &&
		     nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
		    (sig_dbm &&
		     nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
		    nla_put(msg, NL80211_ATTR_FRAME, len, frame))
			goto nla_put_failure;

		genlmsg_end(msg, hdr);

		genlmsg_unicast(wiphy_net(&rdev->wiphy), msg, reg->nlportid);
	}
	spin_unlock_bh(&rdev->beacon_registrations_lock);
	return;

 nla_put_failure:
	spin_unlock_bh(&rdev->beacon_registrations_lock);
	if (hdr)
		genlmsg_cancel(msg, hdr);
	nlmsg_free(msg);
}
Unknown