int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
		       struct cfg80211_auth_request *req)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_mgd_auth_data *auth_data;
	u16 auth_alg;
	int err;
	bool cont_auth;

	/* prepare auth data structure */

	switch (req->auth_type) {
	case NL80211_AUTHTYPE_OPEN_SYSTEM:
		auth_alg = WLAN_AUTH_OPEN;
		break;
	case NL80211_AUTHTYPE_SHARED_KEY:
		if (IS_ERR(local->wep_tx_tfm))
			return -EOPNOTSUPP;
		auth_alg = WLAN_AUTH_SHARED_KEY;
		break;
	case NL80211_AUTHTYPE_FT:
		auth_alg = WLAN_AUTH_FT;
		break;
	case NL80211_AUTHTYPE_NETWORK_EAP:
		auth_alg = WLAN_AUTH_LEAP;
		break;
	case NL80211_AUTHTYPE_SAE:
		auth_alg = WLAN_AUTH_SAE;
		break;
	case NL80211_AUTHTYPE_FILS_SK:
		auth_alg = WLAN_AUTH_FILS_SK;
		break;
	case NL80211_AUTHTYPE_FILS_SK_PFS:
		auth_alg = WLAN_AUTH_FILS_SK_PFS;
		break;
	case NL80211_AUTHTYPE_FILS_PK:
		auth_alg = WLAN_AUTH_FILS_PK;
		break;
	default:
		return -EOPNOTSUPP;
	}

	if (ifmgd->assoc_data)
		return -EBUSY;

	auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
			    req->ie_len, GFP_KERNEL);
	if (!auth_data)
		return -ENOMEM;

	auth_data->bss = req->bss;

	if (req->auth_data_len >= 4) {
		if (req->auth_type == NL80211_AUTHTYPE_SAE) {
			__le16 *pos = (__le16 *) req->auth_data;

			auth_data->sae_trans = le16_to_cpu(pos[0]);
			auth_data->sae_status = le16_to_cpu(pos[1]);
		}
		memcpy(auth_data->data, req->auth_data + 4,
		       req->auth_data_len - 4);
		auth_data->data_len += req->auth_data_len - 4;
	}

	/* Check if continuing authentication or trying to authenticate with the
	 * same BSS that we were in the process of authenticating with and avoid
	 * removal and re-addition of the STA entry in
	 * ieee80211_prep_connection().
	 */
	cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;

	if (req->ie && req->ie_len) {
		memcpy(&auth_data->data[auth_data->data_len],
		       req->ie, req->ie_len);
		auth_data->data_len += req->ie_len;
	}

	if (req->key && req->key_len) {
		auth_data->key_len = req->key_len;
		auth_data->key_idx = req->key_idx;
		memcpy(auth_data->key, req->key, req->key_len);
	}

	auth_data->algorithm = auth_alg;

	/* try to authenticate/probe */

	if (ifmgd->auth_data) {
		if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
			auth_data->peer_confirmed =
				ifmgd->auth_data->peer_confirmed;
		}
		ieee80211_destroy_auth_data(sdata, cont_auth);
	}

	/* prep auth_data so we don't go into idle on disassoc */
	ifmgd->auth_data = auth_data;

	/* If this is continuation of an ongoing SAE authentication exchange
	 * (i.e., request to send SAE Confirm) and the peer has already
	 * confirmed, mark authentication completed since we are about to send
	 * out SAE Confirm.
	 */
	if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
	    auth_data->peer_confirmed && auth_data->sae_trans == 2)
		ieee80211_mark_sta_auth(sdata, req->bss->bssid);

	if (ifmgd->associated) {
		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];

		sdata_info(sdata,
			   "disconnect from AP %pM for new auth to %pM\n",
			   ifmgd->associated->bssid, req->bss->bssid);
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_UNSPECIFIED,
				       false, frame_buf);

		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    WLAN_REASON_UNSPECIFIED);
	}

	sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);

	err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
	if (err)
		goto err_clear;

	err = ieee80211_auth(sdata);
	if (err) {
		sta_info_destroy_addr(sdata, req->bss->bssid);
		goto err_clear;
	}

	/* hold our own reference */
	cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
	return 0;

 err_clear:
	eth_zero_addr(ifmgd->bssid);
	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
	ifmgd->auth_data = NULL;
	mutex_lock(&sdata->local->mtx);
	ieee80211_vif_release_channel(sdata);
	mutex_unlock(&sdata->local->mtx);
	kfree(auth_data);
	return err;
}
int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
		       struct cfg80211_auth_request *req)
{
	struct ieee80211_local *local = sdata->local;
	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
	struct ieee80211_mgd_auth_data *auth_data;
	u16 auth_alg;
	int err;
	bool cont_auth;

	 

	switch (req->auth_type) {
	case NL80211_AUTHTYPE_OPEN_SYSTEM:
		auth_alg = WLAN_AUTH_OPEN;
		break;
	case NL80211_AUTHTYPE_SHARED_KEY:
		if (IS_ERR(local->wep_tx_tfm))
			return -EOPNOTSUPP;
		auth_alg = WLAN_AUTH_SHARED_KEY;
		break;
	case NL80211_AUTHTYPE_FT:
		auth_alg = WLAN_AUTH_FT;
		break;
	case NL80211_AUTHTYPE_NETWORK_EAP:
		auth_alg = WLAN_AUTH_LEAP;
		break;
	case NL80211_AUTHTYPE_SAE:
		auth_alg = WLAN_AUTH_SAE;
		break;
	case NL80211_AUTHTYPE_FILS_SK:
		auth_alg = WLAN_AUTH_FILS_SK;
		break;
	case NL80211_AUTHTYPE_FILS_SK_PFS:
		auth_alg = WLAN_AUTH_FILS_SK_PFS;
		break;
	case NL80211_AUTHTYPE_FILS_PK:
		auth_alg = WLAN_AUTH_FILS_PK;
		break;
	default:
		return -EOPNOTSUPP;
	}

	if (ifmgd->assoc_data)
		return -EBUSY;

	auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len +
			    req->ie_len, GFP_KERNEL);
	if (!auth_data)
		return -ENOMEM;

	auth_data->bss = req->bss;

	if (req->auth_data_len >= 4) {
		if (req->auth_type == NL80211_AUTHTYPE_SAE) {
			__le16 *pos = (__le16 *) req->auth_data;

			auth_data->sae_trans = le16_to_cpu(pos[0]);
			auth_data->sae_status = le16_to_cpu(pos[1]);
		}
		memcpy(auth_data->data, req->auth_data + 4,
		       req->auth_data_len - 4);
		auth_data->data_len += req->auth_data_len - 4;
	}

	 
	cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss;

	if (req->ie && req->ie_len) {
		memcpy(&auth_data->data[auth_data->data_len],
		       req->ie, req->ie_len);
		auth_data->data_len += req->ie_len;
	}

	if (req->key && req->key_len) {
		auth_data->key_len = req->key_len;
		auth_data->key_idx = req->key_idx;
		memcpy(auth_data->key, req->key, req->key_len);
	}

	auth_data->algorithm = auth_alg;

	 

	if (ifmgd->auth_data) {
		if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) {
			auth_data->peer_confirmed =
				ifmgd->auth_data->peer_confirmed;
		}
		ieee80211_destroy_auth_data(sdata, cont_auth);
	}

	 
	ifmgd->auth_data = auth_data;

	 
	if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE &&
	    auth_data->peer_confirmed && auth_data->sae_trans == 2)
		ieee80211_mark_sta_auth(sdata, req->bss->bssid);

	if (ifmgd->associated) {
		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];

		sdata_info(sdata,
			   "disconnect from AP %pM for new auth to %pM\n",
			   ifmgd->associated->bssid, req->bss->bssid);
		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
				       WLAN_REASON_UNSPECIFIED,
				       false, frame_buf);

		ieee80211_report_disconnect(sdata, frame_buf,
					    sizeof(frame_buf), true,
					    WLAN_REASON_UNSPECIFIED);
	}

	sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);

	err = ieee80211_prep_connection(sdata, req->bss, cont_auth, false);
	if (err)
		goto err_clear;

	err = ieee80211_auth(sdata);
	if (err) {
		sta_info_destroy_addr(sdata, req->bss->bssid);
		goto err_clear;
	}

	 
	cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
	return 0;

 err_clear:
	eth_zero_addr(ifmgd->bssid);
	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
	ifmgd->auth_data = NULL;
	mutex_lock(&sdata->local->mtx);
	ieee80211_vif_release_channel(sdata);
	mutex_unlock(&sdata->local->mtx);
	kfree(auth_data);
	return err;
}