path: root/net/wireless/mlme.c

// SPDX-License-Identifier: GPL-2.0
/*
 * cfg80211 MLME SAP interface
 *
 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
 * Copyright (c) 2015		Intel Deutschland GmbH
 * Copyright (C) 2019-2020, 2022 Intel Corporation
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/nl80211.h>
#include <linux/slab.h>
#include <linux/wireless.h>
#include <net/cfg80211.h>
#include <net/iw_handler.h>
#include "core.h"
#include "nl80211.h"
#include "rdev-ops.h"


void cfg80211_rx_assoc_resp(struct net_device *dev,
			    struct cfg80211_rx_assoc_resp *data)
{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct wiphy *wiphy = wdev->wiphy;
	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)data->buf;
	struct cfg80211_connect_resp_params cr = {
		.timeout_reason = NL80211_TIMEOUT_UNSPECIFIED,
		.req_ie = data->req_ies,
		.req_ie_len = data->req_ies_len,
		.resp_ie = mgmt->u.assoc_resp.variable,
		.resp_ie_len = data->len -
			       offsetof(struct ieee80211_mgmt,
					u.assoc_resp.variable),
		.status = le16_to_cpu(mgmt->u.assoc_resp.status_code),
		.ap_mld_addr = data->ap_mld_addr,
	};
	unsigned int link_id;

	for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) {
		cr.links[link_id].status = data->links[link_id].status;
		WARN_ON_ONCE(cr.links[link_id].status != WLAN_STATUS_SUCCESS &&
			     (!cr.ap_mld_addr || !cr.links[link_id].bss));

		cr.links[link_id].bss = data->links[link_id].bss;
		if (!cr.links[link_id].bss)
			continue;
		cr.links[link_id].bssid = data->links[link_id].bss->bssid;
		cr.links[link_id].addr = data->links[link_id].addr;
		/* need to have local link addresses for MLO connections */
		WARN_ON(cr.ap_mld_addr && !cr.links[link_id].addr);

		BUG_ON(!cr.links[link_id].bss->channel);

		if (cr.links[link_id].bss->channel->band == NL80211_BAND_S1GHZ) {
			WARN_ON(link_id);
			cr.resp_ie = (u8 *)&mgmt->u.s1g_assoc_resp.variable;
			cr.resp_ie_len = data->len -
					 offsetof(struct ieee80211_mgmt,
						  u.s1g_assoc_resp.variable);
		}

		if (cr.ap_mld_addr)
			cr.valid_links |= BIT(link_id);
	}

	trace_cfg80211_send_rx_assoc(dev, data);

	/*
	 * This is a bit of a hack, we don't notify userspace of
	 * a (re-)association reply if we tried to send a reassoc
	 * and got a reject -- we only try again with an assoc
	 * frame instead of reassoc.
	 */
	if (cfg80211_sme_rx_assoc_resp(wdev, cr.status)) {
		for (link_id = 0; link_id < ARRAY_SIZE(data->links); link_id++) {
			struct cfg80211_bss *bss = data->links[link_id].bss;

			if (!bss)
				continue;

			cfg80211_unhold_bss(bss_from_pub(bss));
			cfg80211_put_bss(wiphy, bss);
		}
		return;
	}

	nl80211_send_rx_assoc(rdev, dev, data);
	/* update current_bss etc., consumes the bss reference */
	__cfg80211_connect_result(dev, &cr, cr.status == WLAN_STATUS_SUCCESS);
}
EXPORT_SYMBOL(cfg80211_rx_assoc_resp);

static void cfg80211_process_auth(struct wireless_dev *wdev,
				  const u8 *buf, size_t len)
{
	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);

	nl80211_send_rx_auth(rdev, wdev->netdev, buf, len, GFP_KERNEL);
	cfg80211_sme_rx_auth(wdev, buf, len);
}

static void cfg80211_process_deauth(struct wireless_dev *wdev,
				    const u8 *buf, size_t len,
				    bool reconnect)
{
	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);