Commit message: mwifiex: Fix possible buffer overflows in mwifiex_cmd_append_vsie_tlv()

mwifiex_cmd_append_vsie_tlv() calls memcpy() without checking
the destination size may trigger a buffer overflower,
which a local user could use to cause denial of service
or the execution of arbitrary code.
Fix it by putting the length check before calling memcpy().

Signed-off-by: Qing Xu <m1s5p6688@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
CVE: CVE-2020-12653
CWE: CWE-269
Vulnerability description: An issue was found in Linux kernel before 5.5.4. The mwifiex_cmd_append_vsie_tlv() function in drivers/net/wireless/marvell/mwifiex/scan.c allows local users to gain privileges or cause a denial of service because of an incorrect memcpy and buffer overflow, aka CID-b70261a288ea.

Project: linux
File: scan.c

mwifiex_is_bss_wpa(struct mwifiex_private *priv,
		   struct mwifiex_bssdescriptor *bss_desc)
{
	if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled &&
	    !priv->sec_info.wpa2_enabled &&
	    has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC)
	   /*
	    * Privacy bit may NOT be set in some APs like
	    * LinkSys WRT54G && bss_desc->privacy
	    */
	 ) {
		dbg_security_flags(INFO, "WPA", priv, bss_desc);
		return true;
	}
	return false;
}

Project: linux
File: scan.c

mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui)
{
	u8 count;

	count = iebody->ptk_cnt[0];

	/* There could be multiple OUIs for PTK hence
	   1) Take the length.
	   2) Check all the OUIs for AES.
	   3) If one of them is AES then pass success. */
	while (count) {
		if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body)))
			return MWIFIEX_OUI_PRESENT;

		--count;
		if (count)
			iebody = (struct ie_body *) ((u8 *) iebody +
						sizeof(iebody->ptk_body));
	}

	pr_debug("info: %s: OUI is not found in PTK\n", __func__);
	return MWIFIEX_OUI_NOT_PRESENT;
}

Project: linux
File: scan.c

mwifiex_radio_type_to_band(u8 radio_type)
{
	switch (radio_type) {
	case HostCmd_SCAN_RADIO_TYPE_A:
		return BAND_A;
	case HostCmd_SCAN_RADIO_TYPE_BG:
	default:
		return BAND_G;
	}
}

Project: linux
File: scan.c

mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
{
	u8 *oui;
	struct ie_body *iebody;
	u8 ret = MWIFIEX_OUI_NOT_PRESENT;

	if (has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC)) {
		iebody = (struct ie_body *)((u8 *)bss_desc->bcn_wpa_ie->data +
					    WPA_GTK_OUI_OFFSET);
		oui = &mwifiex_wpa_oui[cipher][0];
		ret = mwifiex_search_oui_in_ie(iebody, oui);
		if (ret)
			return ret;
	}
	return ret;
}

Project: linux
File: scan.c

int mwifiex_request_scan(struct mwifiex_private *priv,
			 struct cfg80211_ssid *req_ssid)
{
	int ret;

	if (mutex_lock_interruptible(&priv->async_mutex)) {
		mwifiex_dbg(priv->adapter, ERROR,
			    "%s: acquire semaphore fail\n",
			    __func__);
		return -1;
	}

	priv->adapter->scan_wait_q_woken = false;

	if (req_ssid && req_ssid->ssid_len != 0)
		/* Specific SSID scan */
		ret = mwifiex_scan_specific_ssid(priv, req_ssid);
	else
		/* Normal scan */
		ret = mwifiex_scan_networks(priv, NULL);

	mutex_unlock(&priv->async_mutex);

	return ret;
}

Project: linux
File: scan.c

mwifiex_bgscan_create_channel_list(struct mwifiex_private *priv,
				   const struct mwifiex_bg_scan_cfg
						*bgscan_cfg_in,
				   struct mwifiex_chan_scan_param_set
						*scan_chan_list)
{
	enum nl80211_band band;
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *ch;
	struct mwifiex_adapter *adapter = priv->adapter;
	int chan_idx = 0, i;

	for (band = 0; (band < NUM_NL80211_BANDS); band++) {
		if (!priv->wdev.wiphy->bands[band])
			continue;

		sband = priv->wdev.wiphy->bands[band];

		for (i = 0; (i < sband->n_channels) ; i++) {
			ch = &sband->channels[i];
			if (ch->flags & IEEE80211_CHAN_DISABLED)
				continue;
			scan_chan_list[chan_idx].radio_type = band;

			if (bgscan_cfg_in->chan_list[0].scan_time)
				scan_chan_list[chan_idx].max_scan_time =
					cpu_to_le16((u16)bgscan_cfg_in->
					chan_list[0].scan_time);
			else if (ch->flags & IEEE80211_CHAN_NO_IR)
				scan_chan_list[chan_idx].max_scan_time =
					cpu_to_le16(adapter->passive_scan_time);
			else
				scan_chan_list[chan_idx].max_scan_time =
					cpu_to_le16(adapter->
						    specific_scan_time);

			if (ch->flags & IEEE80211_CHAN_NO_IR)
				scan_chan_list[chan_idx].chan_scan_mode_bitmap
					|= MWIFIEX_PASSIVE_SCAN;
			else
				scan_chan_list[chan_idx].chan_scan_mode_bitmap
					&= ~MWIFIEX_PASSIVE_SCAN;

			scan_chan_list[chan_idx].chan_number =
							(u32)ch->hw_value;
			chan_idx++;
		}
	}
	return chan_idx;
}

Project: linux
File: scan.c

mwifiex_is_bss_no_sec(struct mwifiex_private *priv,
		      struct mwifiex_bssdescriptor *bss_desc)
{
	if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
	    !priv->sec_info.wpa2_enabled &&
	    !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) &&
	    !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) &&
	    !priv->sec_info.encryption_mode && !bss_desc->privacy) {
		return true;
	}
	return false;
}

Project: linux
File: scan.c

mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv,
			   struct mwifiex_bssdescriptor *bss_desc)
{
	if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
	    !priv->sec_info.wpa2_enabled &&
	    !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) &&
	    !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) &&
	    priv->sec_info.encryption_mode && bss_desc->privacy) {
		dbg_security_flags(INFO, "dynamic", priv, bss_desc);
		return true;
	}
	return false;
}

Project: linux
File: scan.c

has_ieee_hdr(struct ieee_types_generic *ie, u8 key)
{
	return (ie && ie->ieee_hdr.element_id == key);
}

Project: linux
File: scan.c

int mwifiex_ret_802_11_scan(struct mwifiex_private *priv,
			    struct host_cmd_ds_command *resp)
{
	int ret = 0;
	struct mwifiex_adapter *adapter = priv->adapter;
	struct host_cmd_ds_802_11_scan_rsp *scan_rsp;
	struct mwifiex_ie_types_data *tlv_data;
	struct mwifiex_ie_types_tsf_timestamp *tsf_tlv;
	u8 *bss_info;
	u32 scan_resp_size;
	u32 bytes_left;
	u32 idx;
	u32 tlv_buf_size;
	struct mwifiex_ie_types_chan_band_list_param_set *chan_band_tlv;
	struct chan_band_param_set *chan_band;
	u8 is_bgscan_resp;
	__le64 fw_tsf = 0;
	u8 *radio_type;
	struct cfg80211_wowlan_nd_match *pmatch;
	struct cfg80211_sched_scan_request *nd_config = NULL;

	is_bgscan_resp = (le16_to_cpu(resp->command)
			  == HostCmd_CMD_802_11_BG_SCAN_QUERY);
	if (is_bgscan_resp)
		scan_rsp = &resp->params.bg_scan_query_resp.scan_resp;
	else
		scan_rsp = &resp->params.scan_resp;


	if (scan_rsp->number_of_sets > MWIFIEX_MAX_AP) {
		mwifiex_dbg(adapter, ERROR,
			    "SCAN_RESP: too many AP returned (%d)\n",
			    scan_rsp->number_of_sets);
		ret = -1;
		goto check_next_scan;
	}

	/* Check csa channel expiry before parsing scan response */
	mwifiex_11h_get_csa_closed_channel(priv);

	bytes_left = le16_to_cpu(scan_rsp->bss_descript_size);
	mwifiex_dbg(adapter, INFO,
		    "info: SCAN_RESP: bss_descript_size %d\n",
		    bytes_left);

	scan_resp_size = le16_to_cpu(resp->size);

	mwifiex_dbg(adapter, INFO,
		    "info: SCAN_RESP: returned %d APs before parsing\n",
		    scan_rsp->number_of_sets);

	bss_info = scan_rsp->bss_desc_and_tlv_buffer;

	/*
	 * The size of the TLV buffer is equal to the entire command response
	 *   size (scan_resp_size) minus the fixed fields (sizeof()'s), the
	 *   BSS Descriptions (bss_descript_size as bytesLef) and the command
	 *   response header (S_DS_GEN)
	 */
	tlv_buf_size = scan_resp_size - (bytes_left
					 + sizeof(scan_rsp->bss_descript_size)
					 + sizeof(scan_rsp->number_of_sets)
					 + S_DS_GEN);

	tlv_data = (struct mwifiex_ie_types_data *) (scan_rsp->
						 bss_desc_and_tlv_buffer +
						 bytes_left);

	/* Search the TLV buffer space in the scan response for any valid
	   TLVs */
	mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
					     TLV_TYPE_TSFTIMESTAMP,
					     (struct mwifiex_ie_types_data **)
					     &tsf_tlv);

	/* Search the TLV buffer space in the scan response for any valid
	   TLVs */
	mwifiex_ret_802_11_scan_get_tlv_ptrs(adapter, tlv_data, tlv_buf_size,
					     TLV_TYPE_CHANNELBANDLIST,
					     (struct mwifiex_ie_types_data **)
					     &chan_band_tlv);

#ifdef CONFIG_PM
	if (priv->wdev.wiphy->wowlan_config)
		nd_config = priv->wdev.wiphy->wowlan_config->nd_config;
#endif

	if (nd_config) {
		adapter->nd_info =
			kzalloc(sizeof(struct cfg80211_wowlan_nd_match) +
				sizeof(struct cfg80211_wowlan_nd_match *) *
				scan_rsp->number_of_sets, GFP_ATOMIC);

		if (adapter->nd_info)
			adapter->nd_info->n_matches = scan_rsp->number_of_sets;
	}

	for (idx = 0; idx < scan_rsp->number_of_sets && bytes_left; idx++) {
		/*
		 * If the TSF TLV was appended to the scan results, save this
		 * entry's TSF value in the fw_tsf field. It is the firmware's
		 * TSF value at the time the beacon or probe response was
		 * received.
		 */
		if (tsf_tlv)
			memcpy(&fw_tsf, &tsf_tlv->tsf_data[idx * TSF_DATA_SIZE],
			       sizeof(fw_tsf));

		if (chan_band_tlv) {
			chan_band = &chan_band_tlv->chan_band_param[idx];
			radio_type = &chan_band->radio_type;
		} else {
			radio_type = NULL;
		}

		if (chan_band_tlv && adapter->nd_info) {
			adapter->nd_info->matches[idx] =
				kzalloc(sizeof(*pmatch) + sizeof(u32),
					GFP_ATOMIC);

			pmatch = adapter->nd_info->matches[idx];

			if (pmatch) {
				pmatch->n_channels = 1;
				pmatch->channels[0] = chan_band->chan_number;
			}
		}

		ret = mwifiex_parse_single_response_buf(priv, &bss_info,
							&bytes_left,
							le64_to_cpu(fw_tsf),
							radio_type, false, 0);
		if (ret)
			goto check_next_scan;
	}

check_next_scan:
	mwifiex_check_next_scan_command(priv);
	return ret;
}

Project: linux
File: scan.c

mwifiex_is_bss_static_wep(struct mwifiex_private *priv,
			  struct mwifiex_bssdescriptor *bss_desc)
{
	if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
	    !priv->sec_info.wpa2_enabled && bss_desc->privacy) {
		return true;
	}
	return false;
}

Project: linux
File: scan.c

static int mwifiex_scan_specific_ssid(struct mwifiex_private *priv,
				      struct cfg80211_ssid *req_ssid)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	int ret;
	struct mwifiex_user_scan_cfg *scan_cfg;

	if (adapter->scan_processing) {
		mwifiex_dbg(adapter, WARN,
			    "cmd: Scan already in process...\n");
		return -EBUSY;
	}

	if (priv->scan_block) {
		mwifiex_dbg(adapter, WARN,
			    "cmd: Scan is blocked during association...\n");
		return -EBUSY;
	}

	scan_cfg = kzalloc(sizeof(struct mwifiex_user_scan_cfg), GFP_KERNEL);
	if (!scan_cfg)
		return -ENOMEM;

	scan_cfg->ssid_list = req_ssid;
	scan_cfg->num_ssids = 1;

	ret = mwifiex_scan_networks(priv, scan_cfg);

	kfree(scan_cfg);
	return ret;
}

Project: linux
File: scan.c

mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
{
	u8 *oui;
	struct ie_body *iebody;
	u8 ret = MWIFIEX_OUI_NOT_PRESENT;

	if (has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) {
		iebody = (struct ie_body *)
			 (((u8 *) bss_desc->bcn_rsn_ie->data) +
			  RSN_GTK_OUI_OFFSET);
		oui = &mwifiex_rsn_oui[cipher][0];
		ret = mwifiex_search_oui_in_ie(iebody, oui);
		if (ret)
			return ret;
	}
	return ret;
}

Project: linux
File: scan.c

int mwifiex_scan_networks(struct mwifiex_private *priv,
			  const struct mwifiex_user_scan_cfg *user_scan_in)
{
	int ret;
	struct mwifiex_adapter *adapter = priv->adapter;
	struct cmd_ctrl_node *cmd_node;
	union mwifiex_scan_cmd_config_tlv *scan_cfg_out;
	struct mwifiex_ie_types_chan_list_param_set *chan_list_out;
	struct mwifiex_chan_scan_param_set *scan_chan_list;
	u8 filtered_scan;
	u8 scan_current_chan_only;
	u8 max_chan_per_scan;

	if (adapter->scan_processing) {
		mwifiex_dbg(adapter, WARN,
			    "cmd: Scan already in process...\n");
		return -EBUSY;
	}

	if (priv->scan_block) {
		mwifiex_dbg(adapter, WARN,
			    "cmd: Scan is blocked during association...\n");
		return -EBUSY;
	}

	if (test_bit(MWIFIEX_SURPRISE_REMOVED, &adapter->work_flags) ||
	    test_bit(MWIFIEX_IS_CMD_TIMEDOUT, &adapter->work_flags)) {
		mwifiex_dbg(adapter, ERROR,
			    "Ignore scan. Card removed or firmware in bad state\n");
		return -EFAULT;
	}

	spin_lock_bh(&adapter->mwifiex_cmd_lock);
	adapter->scan_processing = true;
	spin_unlock_bh(&adapter->mwifiex_cmd_lock);

	scan_cfg_out = kzalloc(sizeof(union mwifiex_scan_cmd_config_tlv),
			       GFP_KERNEL);
	if (!scan_cfg_out) {
		ret = -ENOMEM;
		goto done;
	}

	scan_chan_list = kcalloc(MWIFIEX_USER_SCAN_CHAN_MAX,
				 sizeof(struct mwifiex_chan_scan_param_set),
				 GFP_KERNEL);
	if (!scan_chan_list) {
		kfree(scan_cfg_out);
		ret = -ENOMEM;
		goto done;
	}

	mwifiex_config_scan(priv, user_scan_in, &scan_cfg_out->config,
			    &chan_list_out, scan_chan_list, &max_chan_per_scan,
			    &filtered_scan, &scan_current_chan_only);

	ret = mwifiex_scan_channel_list(priv, max_chan_per_scan, filtered_scan,
					&scan_cfg_out->config, chan_list_out,
					scan_chan_list);

	/* Get scan command from scan_pending_q and put to cmd_pending_q */
	if (!ret) {
		spin_lock_bh(&adapter->scan_pending_q_lock);
		if (!list_empty(&adapter->scan_pending_q)) {
			cmd_node = list_first_entry(&adapter->scan_pending_q,
						    struct cmd_ctrl_node, list);
			list_del(&cmd_node->list);
			spin_unlock_bh(&adapter->scan_pending_q_lock);
			mwifiex_insert_cmd_to_pending_q(adapter, cmd_node);
			queue_work(adapter->workqueue, &adapter->main_work);

			/* Perform internal scan synchronously */
			if (!priv->scan_request) {
				mwifiex_dbg(adapter, INFO,
					    "wait internal scan\n");
				mwifiex_wait_queue_complete(adapter, cmd_node);
			}
		} else {
			spin_unlock_bh(&adapter->scan_pending_q_lock);
		}
	}

	kfree(scan_cfg_out);
	kfree(scan_chan_list);
done:
	if (ret) {
		spin_lock_bh(&adapter->mwifiex_cmd_lock);
		adapter->scan_processing = false;
		spin_unlock_bh(&adapter->mwifiex_cmd_lock);
	}
	return ret;
}

Project: linux
File: scan.c

mwifiex_free_curr_bcn(struct mwifiex_private *priv)
{
	kfree(priv->curr_bcn_buf);
	priv->curr_bcn_buf = NULL;
}

Project: linux
File: scan.c

mwifiex_parse_single_response_buf(struct mwifiex_private *priv, u8 **bss_info,
				  u32 *bytes_left, u64 fw_tsf, u8 *radio_type,
				  bool ext_scan, s32 rssi_val)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	struct mwifiex_chan_freq_power *cfp;
	struct cfg80211_bss *bss;
	u8 bssid[ETH_ALEN];
	s32 rssi;
	const u8 *ie_buf;
	size_t ie_len;
	u16 channel = 0;
	u16 beacon_size = 0;
	u32 curr_bcn_bytes;
	u32 freq;
	u16 beacon_period;
	u16 cap_info_bitmap;
	u8 *current_ptr;
	u64 timestamp;
	struct mwifiex_fixed_bcn_param *bcn_param;
	struct mwifiex_bss_priv *bss_priv;

	if (*bytes_left >= sizeof(beacon_size)) {
		/* Extract & convert beacon size from command buffer */
		beacon_size = get_unaligned_le16((*bss_info));
		*bytes_left -= sizeof(beacon_size);
		*bss_info += sizeof(beacon_size);
	}

	if (!beacon_size || beacon_size > *bytes_left) {
		*bss_info += *bytes_left;
		*bytes_left = 0;
		return -EFAULT;
	}

	/* Initialize the current working beacon pointer for this BSS
	 * iteration
	 */
	current_ptr = *bss_info;

	/* Advance the return beacon pointer past the current beacon */
	*bss_info += beacon_size;
	*bytes_left -= beacon_size;

	curr_bcn_bytes = beacon_size;

	/* First 5 fields are bssid, RSSI(for legacy scan only),
	 * time stamp, beacon interval, and capability information
	 */
	if (curr_bcn_bytes < ETH_ALEN + sizeof(u8) +
	    sizeof(struct mwifiex_fixed_bcn_param)) {
		mwifiex_dbg(adapter, ERROR,
			    "InterpretIE: not enough bytes left\n");
		return -EFAULT;
	}

	memcpy(bssid, current_ptr, ETH_ALEN);
	current_ptr += ETH_ALEN;
	curr_bcn_bytes -= ETH_ALEN;

	if (!ext_scan) {
		rssi = (s32) *current_ptr;
		rssi = (-rssi) * 100;		/* Convert dBm to mBm */
		current_ptr += sizeof(u8);
		curr_bcn_bytes -= sizeof(u8);
		mwifiex_dbg(adapter, INFO,
			    "info: InterpretIE: RSSI=%d\n", rssi);
	} else {
		rssi = rssi_val;
	}

	bcn_param = (struct mwifiex_fixed_bcn_param *)current_ptr;
	current_ptr += sizeof(*bcn_param);
	curr_bcn_bytes -= sizeof(*bcn_param);

	timestamp = le64_to_cpu(bcn_param->timestamp);
	beacon_period = le16_to_cpu(bcn_param->beacon_period);

	cap_info_bitmap = le16_to_cpu(bcn_param->cap_info_bitmap);
	mwifiex_dbg(adapter, INFO,
		    "info: InterpretIE: capabilities=0x%X\n",
		    cap_info_bitmap);

	/* Rest of the current buffer are IE's */
	ie_buf = current_ptr;
	ie_len = curr_bcn_bytes;
	mwifiex_dbg(adapter, INFO,
		    "info: InterpretIE: IELength for this AP = %d\n",
		    curr_bcn_bytes);

	while (curr_bcn_bytes >= sizeof(struct ieee_types_header)) {
		u8 element_id, element_len;

		element_id = *current_ptr;
		element_len = *(current_ptr + 1);
		if (curr_bcn_bytes < element_len +
				sizeof(struct ieee_types_header)) {
			mwifiex_dbg(adapter, ERROR,
				    "%s: bytes left < IE length\n", __func__);
			return -EFAULT;
		}
		if (element_id == WLAN_EID_DS_PARAMS) {
			channel = *(current_ptr +
				    sizeof(struct ieee_types_header));
			break;
		}

		current_ptr += element_len + sizeof(struct ieee_types_header);
		curr_bcn_bytes -= element_len +
					sizeof(struct ieee_types_header);
	}

	if (channel) {
		struct ieee80211_channel *chan;
		u8 band;

		/* Skip entry if on csa closed channel */
		if (channel == priv->csa_chan) {
			mwifiex_dbg(adapter, WARN,
				    "Dropping entry on csa closed channel\n");
			return 0;
		}

		band = BAND_G;
		if (radio_type)
			band = mwifiex_radio_type_to_band(*radio_type &
							  (BIT(0) | BIT(1)));

		cfp = mwifiex_get_cfp(priv, band, channel, 0);

		freq = cfp ? cfp->freq : 0;

		chan = ieee80211_get_channel(priv->wdev.wiphy, freq);

		if (chan && !(chan->flags & IEEE80211_CHAN_DISABLED)) {
			bss = cfg80211_inform_bss(priv->wdev.wiphy,
					    chan, CFG80211_BSS_FTYPE_UNKNOWN,
					    bssid, timestamp,
					    cap_info_bitmap, beacon_period,
					    ie_buf, ie_len, rssi, GFP_KERNEL);
			if (bss) {
				bss_priv = (struct mwifiex_bss_priv *)bss->priv;
				bss_priv->band = band;
				bss_priv->fw_tsf = fw_tsf;
				if (priv->media_connected &&
				    !memcmp(bssid, priv->curr_bss_params.
					    bss_descriptor.mac_address,
					    ETH_ALEN))
					mwifiex_update_curr_bss_params(priv,
								       bss);

				if ((chan->flags & IEEE80211_CHAN_RADAR) ||
				    (chan->flags & IEEE80211_CHAN_NO_IR)) {
					mwifiex_dbg(adapter, INFO,
						    "radar or passive channel %d\n",
						    channel);
					mwifiex_save_hidden_ssid_channels(priv,
									  bss);
				}

				cfg80211_put_bss(priv->wdev.wiphy, bss);
			}
		}
	} else {
		mwifiex_dbg(adapter, WARN, "missing BSS channel IE\n");
	}

	return 0;
}

Project: linux
File: scan.c

static void mwifiex_check_next_scan_command(struct mwifiex_private *priv)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	struct cmd_ctrl_node *cmd_node;

	spin_lock_bh(&adapter->scan_pending_q_lock);
	if (list_empty(&adapter->scan_pending_q)) {
		spin_unlock_bh(&adapter->scan_pending_q_lock);

		spin_lock_bh(&adapter->mwifiex_cmd_lock);
		adapter->scan_processing = false;
		spin_unlock_bh(&adapter->mwifiex_cmd_lock);

		mwifiex_active_scan_req_for_passive_chan(priv);

		if (!adapter->ext_scan)
			mwifiex_complete_scan(priv);

		if (priv->scan_request) {
			struct cfg80211_scan_info info = {
				.aborted = false,
			};

			mwifiex_dbg(adapter, INFO,
				    "info: notifying scan done\n");
			cfg80211_scan_done(priv->scan_request, &info);
			priv->scan_request = NULL;
			priv->scan_aborting = false;
		} else {
			priv->scan_aborting = false;
			mwifiex_dbg(adapter, INFO,
				    "info: scan already aborted\n");
		}
	} else if ((priv->scan_aborting && !priv->scan_request) ||
		   priv->scan_block) {
		spin_unlock_bh(&adapter->scan_pending_q_lock);

		mwifiex_cancel_pending_scan_cmd(adapter);

		spin_lock_bh(&adapter->mwifiex_cmd_lock);
		adapter->scan_processing = false;
		spin_unlock_bh(&adapter->mwifiex_cmd_lock);

		if (!adapter->active_scan_triggered) {
			if (priv->scan_request) {
				struct cfg80211_scan_info info = {
					.aborted = true,
				};

				mwifiex_dbg(adapter, INFO,
					    "info: aborting scan\n");
				cfg80211_scan_done(priv->scan_request, &info);
				priv->scan_request = NULL;
				priv->scan_aborting = false;
			} else {
				priv->scan_aborting = false;
				mwifiex_dbg(adapter, INFO,
					    "info: scan already aborted\n");
			}
		}
	} else {
		/* Get scan command from scan_pending_q and put to
		 * cmd_pending_q
		 */
		cmd_node = list_first_entry(&adapter->scan_pending_q,
					    struct cmd_ctrl_node, list);
		list_del(&cmd_node->list);
		spin_unlock_bh(&adapter->scan_pending_q_lock);
		mwifiex_insert_cmd_to_pending_q(adapter, cmd_node);
	}

	return;
}

Project: linux
File: scan.c

has_vendor_hdr(struct ieee_types_vendor_specific *ie, u8 key)
{
	return (ie && ie->vend_hdr.element_id == key);
}

Project: linux
File: scan.c

mwifiex_update_chan_statistics(struct mwifiex_private *priv,
			       struct mwifiex_ietypes_chanstats *tlv_stat)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	u8 i, num_chan;
	struct mwifiex_fw_chan_stats *fw_chan_stats;
	struct mwifiex_chan_stats chan_stats;

	fw_chan_stats = (void *)((u8 *)tlv_stat +
			      sizeof(struct mwifiex_ie_types_header));
	num_chan = le16_to_cpu(tlv_stat->header.len) /
					      sizeof(struct mwifiex_chan_stats);

	for (i = 0 ; i < num_chan; i++) {
		if (adapter->survey_idx >= adapter->num_in_chan_stats) {
			mwifiex_dbg(adapter, WARN,
				    "FW reported too many channel results (max %d)\n",
				    adapter->num_in_chan_stats);
			return;
		}
		chan_stats.chan_num = fw_chan_stats->chan_num;
		chan_stats.bandcfg = fw_chan_stats->bandcfg;
		chan_stats.flags = fw_chan_stats->flags;
		chan_stats.noise = fw_chan_stats->noise;
		chan_stats.total_bss = le16_to_cpu(fw_chan_stats->total_bss);
		chan_stats.cca_scan_dur =
				       le16_to_cpu(fw_chan_stats->cca_scan_dur);
		chan_stats.cca_busy_dur =
				       le16_to_cpu(fw_chan_stats->cca_busy_dur);
		mwifiex_dbg(adapter, INFO,
			    "chan=%d, noise=%d, total_network=%d scan_duration=%d, busy_duration=%d\n",
			    chan_stats.chan_num,
			    chan_stats.noise,
			    chan_stats.total_bss,
			    chan_stats.cca_scan_dur,
			    chan_stats.cca_busy_dur);
		memcpy(&adapter->chan_stats[adapter->survey_idx++], &chan_stats,
		       sizeof(struct mwifiex_chan_stats));
		fw_chan_stats++;
	}
}

Project: linux
File: scan.c

int mwifiex_update_bss_desc_with_ie(struct mwifiex_adapter *adapter,
				    struct mwifiex_bssdescriptor *bss_entry)
{
	int ret = 0;
	u8 element_id;
	struct ieee_types_fh_param_set *fh_param_set;
	struct ieee_types_ds_param_set *ds_param_set;
	struct ieee_types_cf_param_set *cf_param_set;
	struct ieee_types_ibss_param_set *ibss_param_set;
	u8 *current_ptr;
	u8 *rate;
	u8 element_len;
	u16 total_ie_len;
	u8 bytes_to_copy;
	u8 rate_size;
	u8 found_data_rate_ie;
	u32 bytes_left;
	struct ieee_types_vendor_specific *vendor_ie;
	const u8 wpa_oui[4] = { 0x00, 0x50, 0xf2, 0x01 };
	const u8 wmm_oui[4] = { 0x00, 0x50, 0xf2, 0x02 };

	found_data_rate_ie = false;
	rate_size = 0;
	current_ptr = bss_entry->beacon_buf;
	bytes_left = bss_entry->beacon_buf_size;

	/* Process variable IE */
	while (bytes_left >= 2) {
		element_id = *current_ptr;
		element_len = *(current_ptr + 1);
		total_ie_len = element_len + sizeof(struct ieee_types_header);

		if (bytes_left < total_ie_len) {
			mwifiex_dbg(adapter, ERROR,
				    "err: InterpretIE: in processing\t"
				    "IE, bytes left < IE length\n");
			return -EINVAL;
		}
		switch (element_id) {
		case WLAN_EID_SSID:
			if (element_len > IEEE80211_MAX_SSID_LEN)
				return -EINVAL;
			bss_entry->ssid.ssid_len = element_len;
			memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
			       element_len);
			mwifiex_dbg(adapter, INFO,
				    "info: InterpretIE: ssid: %-32s\n",
				    bss_entry->ssid.ssid);
			break;

		case WLAN_EID_SUPP_RATES:
			if (element_len > MWIFIEX_SUPPORTED_RATES)
				return -EINVAL;
			memcpy(bss_entry->data_rates, current_ptr + 2,
			       element_len);
			memcpy(bss_entry->supported_rates, current_ptr + 2,
			       element_len);
			rate_size = element_len;
			found_data_rate_ie = true;
			break;

		case WLAN_EID_FH_PARAMS:
			if (total_ie_len < sizeof(*fh_param_set))
				return -EINVAL;
			fh_param_set =
				(struct ieee_types_fh_param_set *) current_ptr;
			memcpy(&bss_entry->phy_param_set.fh_param_set,
			       fh_param_set,
			       sizeof(struct ieee_types_fh_param_set));
			break;

		case WLAN_EID_DS_PARAMS:
			if (total_ie_len < sizeof(*ds_param_set))
				return -EINVAL;
			ds_param_set =
				(struct ieee_types_ds_param_set *) current_ptr;

			bss_entry->channel = ds_param_set->current_chan;

			memcpy(&bss_entry->phy_param_set.ds_param_set,
			       ds_param_set,
			       sizeof(struct ieee_types_ds_param_set));
			break;

		case WLAN_EID_CF_PARAMS:
			if (total_ie_len < sizeof(*cf_param_set))
				return -EINVAL;
			cf_param_set =
				(struct ieee_types_cf_param_set *) current_ptr;
			memcpy(&bss_entry->ss_param_set.cf_param_set,
			       cf_param_set,
			       sizeof(struct ieee_types_cf_param_set));
			break;

		case WLAN_EID_IBSS_PARAMS:
			if (total_ie_len < sizeof(*ibss_param_set))
				return -EINVAL;
			ibss_param_set =
				(struct ieee_types_ibss_param_set *)
				current_ptr;
			memcpy(&bss_entry->ss_param_set.ibss_param_set,
			       ibss_param_set,
			       sizeof(struct ieee_types_ibss_param_set));
			break;

		case WLAN_EID_ERP_INFO:
			if (!element_len)
				return -EINVAL;
			bss_entry->erp_flags = *(current_ptr + 2);
			break;

		case WLAN_EID_PWR_CONSTRAINT:
			if (!element_len)
				return -EINVAL;
			bss_entry->local_constraint = *(current_ptr + 2);
			bss_entry->sensed_11h = true;
			break;

		case WLAN_EID_CHANNEL_SWITCH:
			bss_entry->chan_sw_ie_present = true;
			/* fall through */
		case WLAN_EID_PWR_CAPABILITY:
		case WLAN_EID_TPC_REPORT:
		case WLAN_EID_QUIET:
			bss_entry->sensed_11h = true;
		    break;

		case WLAN_EID_EXT_SUPP_RATES:
			/*
			 * Only process extended supported rate
			 * if data rate is already found.
			 * Data rate IE should come before
			 * extended supported rate IE
			 */
			if (found_data_rate_ie) {
				if ((element_len + rate_size) >
				    MWIFIEX_SUPPORTED_RATES)
					bytes_to_copy =
						(MWIFIEX_SUPPORTED_RATES -
						 rate_size);
				else
					bytes_to_copy = element_len;

				rate = (u8 *) bss_entry->data_rates;
				rate += rate_size;
				memcpy(rate, current_ptr + 2, bytes_to_copy);

				rate = (u8 *) bss_entry->supported_rates;
				rate += rate_size;
				memcpy(rate, current_ptr + 2, bytes_to_copy);
			}
			break;

		case WLAN_EID_VENDOR_SPECIFIC:
			vendor_ie = (struct ieee_types_vendor_specific *)
					current_ptr;

			/* 802.11 requires at least 3-byte OUI. */
			if (element_len < sizeof(vendor_ie->vend_hdr.oui.oui))
				return -EINVAL;

			/* Not long enough for a match? Skip it. */
			if (element_len < sizeof(wpa_oui))
				break;

			if (!memcmp(&vendor_ie->vend_hdr.oui, wpa_oui,
				    sizeof(wpa_oui))) {
				bss_entry->bcn_wpa_ie =
					(struct ieee_types_vendor_specific *)
					current_ptr;
				bss_entry->wpa_offset = (u16)
					(current_ptr - bss_entry->beacon_buf);
			} else if (!memcmp(&vendor_ie->vend_hdr.oui, wmm_oui,
				    sizeof(wmm_oui))) {
				if (total_ie_len ==
				    sizeof(struct ieee_types_wmm_parameter) ||
				    total_ie_len ==
				    sizeof(struct ieee_types_wmm_info))
					/*
					 * Only accept and copy the WMM IE if
					 * it matches the size expected for the
					 * WMM Info IE or the WMM Parameter IE.
					 */
					memcpy((u8 *) &bss_entry->wmm_ie,
					       current_ptr, total_ie_len);
			}
			break;
		case WLAN_EID_RSN:
			bss_entry->bcn_rsn_ie =
				(struct ieee_types_generic *) current_ptr;
			bss_entry->rsn_offset = (u16) (current_ptr -
							bss_entry->beacon_buf);
			break;
		case WLAN_EID_BSS_AC_ACCESS_DELAY:
			bss_entry->bcn_wapi_ie =
				(struct ieee_types_generic *) current_ptr;
			bss_entry->wapi_offset = (u16) (current_ptr -
							bss_entry->beacon_buf);
			break;
		case WLAN_EID_HT_CAPABILITY:
			bss_entry->bcn_ht_cap = (struct ieee80211_ht_cap *)
					(current_ptr +
					sizeof(struct ieee_types_header));
			bss_entry->ht_cap_offset = (u16) (current_ptr +
					sizeof(struct ieee_types_header) -
					bss_entry->beacon_buf);
			break;
		case WLAN_EID_HT_OPERATION:
			bss_entry->bcn_ht_oper =
				(struct ieee80211_ht_operation *)(current_ptr +
					sizeof(struct ieee_types_header));
			bss_entry->ht_info_offset = (u16) (current_ptr +
					sizeof(struct ieee_types_header) -
					bss_entry->beacon_buf);
			break;
		case WLAN_EID_VHT_CAPABILITY:
			bss_entry->disable_11ac = false;
			bss_entry->bcn_vht_cap =
				(void *)(current_ptr +
					 sizeof(struct ieee_types_header));
			bss_entry->vht_cap_offset =
					(u16)((u8 *)bss_entry->bcn_vht_cap -
					      bss_entry->beacon_buf);
			break;
		case WLAN_EID_VHT_OPERATION:
			bss_entry->bcn_vht_oper =
				(void *)(current_ptr +
					 sizeof(struct ieee_types_header));
			bss_entry->vht_info_offset =
					(u16)((u8 *)bss_entry->bcn_vht_oper -
					      bss_entry->beacon_buf);
			break;
		case WLAN_EID_BSS_COEX_2040:
			bss_entry->bcn_bss_co_2040 = current_ptr;
			bss_entry->bss_co_2040_offset =
				(u16) (current_ptr - bss_entry->beacon_buf);
			break;
		case WLAN_EID_EXT_CAPABILITY:
			bss_entry->bcn_ext_cap = current_ptr;
			bss_entry->ext_cap_offset =
				(u16) (current_ptr - bss_entry->beacon_buf);
			break;
		case WLAN_EID_OPMODE_NOTIF:
			bss_entry->oper_mode = (void *)current_ptr;
			bss_entry->oper_mode_offset =
					(u16)((u8 *)bss_entry->oper_mode -
					      bss_entry->beacon_buf);
			break;
		default:
			break;
		}

		current_ptr += total_ie_len;
		bytes_left -= total_ie_len;

	}	/* while (bytes_left > 2) */
	return ret;
}

Project: linux
File: scan.c

mwifiex_is_bss_wpa2(struct mwifiex_private *priv,
		    struct mwifiex_bssdescriptor *bss_desc)
{
	if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
	    priv->sec_info.wpa2_enabled &&
	    has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN)) {
		/*
		 * Privacy bit may NOT be set in some APs like
		 * LinkSys WRT54G && bss_desc->privacy
		 */
		dbg_security_flags(INFO, "WAP2", priv, bss_desc);
		return true;
	}
	return false;
}

Project: linux
File: scan.c

static int mwifiex_save_hidden_ssid_channels(struct mwifiex_private *priv,
					     struct cfg80211_bss *bss)
{
	struct mwifiex_bssdescriptor *bss_desc;
	int ret;
	int chid;

	/* Allocate and fill new bss descriptor */
	bss_desc = kzalloc(sizeof(*bss_desc), GFP_KERNEL);
	if (!bss_desc)
		return -ENOMEM;

	ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
	if (ret)
		goto done;

	if (mwifiex_is_hidden_ssid(&bss_desc->ssid)) {
		mwifiex_dbg(priv->adapter, INFO, "found hidden SSID\n");
		for (chid = 0 ; chid < MWIFIEX_USER_SCAN_CHAN_MAX; chid++) {
			if (priv->hidden_chan[chid].chan_number ==
			    bss->channel->hw_value)
				break;

			if (!priv->hidden_chan[chid].chan_number) {
				priv->hidden_chan[chid].chan_number =
					bss->channel->hw_value;
				priv->hidden_chan[chid].radio_type =
					bss->channel->band;
				priv->hidden_chan[chid].scan_type =
					MWIFIEX_SCAN_TYPE_ACTIVE;
				break;
			}
		}
	}

done:
	/* beacon_ie buffer was allocated in function
	 * mwifiex_fill_new_bss_desc(). Free it now.
	 */
	kfree(bss_desc->beacon_buf);
	kfree(bss_desc);
	return 0;
}

Project: linux
File: scan.c

mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
		       struct cmd_ctrl_node *cmd_node)
{
	struct mwifiex_adapter *adapter = priv->adapter;

	cmd_node->wait_q_enabled = true;
	cmd_node->condition = &adapter->scan_wait_q_woken;
	spin_lock_bh(&adapter->scan_pending_q_lock);
	list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
	spin_unlock_bh(&adapter->scan_pending_q_lock);
}

Project: linux
File: scan.c

_dbg_security_flags(int log_level, const char *func, const char *desc,
		    struct mwifiex_private *priv,
		    struct mwifiex_bssdescriptor *bss_desc)
{
	_mwifiex_dbg(priv->adapter, log_level,
		     "info: %s: %s:\twpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s\tEncMode=%#x privacy=%#x\n",
		     func, desc,
		     bss_desc->bcn_wpa_ie ?
		     bss_desc->bcn_wpa_ie->vend_hdr.element_id : 0,
		     bss_desc->bcn_rsn_ie ?
		     bss_desc->bcn_rsn_ie->ieee_hdr.element_id : 0,
		     priv->sec_info.wep_enabled ? "e" : "d",
		     priv->sec_info.wpa_enabled ? "e" : "d",
		     priv->sec_info.wpa2_enabled ? "e" : "d",
		     priv->sec_info.encryption_mode,
		     bss_desc->privacy);
}

Project: linux
File: scan.c

static void mwifiex_complete_scan(struct mwifiex_private *priv)
{
	struct mwifiex_adapter *adapter = priv->adapter;

	adapter->survey_idx = 0;
	if (adapter->curr_cmd->wait_q_enabled) {
		adapter->cmd_wait_q.status = 0;
		if (!priv->scan_request) {
			mwifiex_dbg(adapter, INFO,
				    "complete internal scan\n");
			mwifiex_complete_cmd(adapter, adapter->curr_cmd);
		}
	}
}

Project: linux
File: scan.c

int mwifiex_cmd_802_11_scan_ext(struct mwifiex_private *priv,
				struct host_cmd_ds_command *cmd,
				void *data_buf)
{
	struct host_cmd_ds_802_11_scan_ext *ext_scan = &cmd->params.ext_scan;
	struct mwifiex_scan_cmd_config *scan_cfg = data_buf;

	memcpy(ext_scan->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);

	cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN_EXT);

	/* Size is equal to the sizeof(fixed portions) + the TLV len + header */
	cmd->size = cpu_to_le16((u16)(sizeof(ext_scan->reserved)
				      + scan_cfg->tlv_buf_len + S_DS_GEN));

	return 0;
}

Project: linux
File: scan.c

int mwifiex_cmd_802_11_scan(struct host_cmd_ds_command *cmd,
			    struct mwifiex_scan_cmd_config *scan_cfg)
{
	struct host_cmd_ds_802_11_scan *scan_cmd = &cmd->params.scan;

	/* Set fixed field variables in scan command */
	scan_cmd->bss_mode = scan_cfg->bss_mode;
	memcpy(scan_cmd->bssid, scan_cfg->specific_bssid,
	       sizeof(scan_cmd->bssid));
	memcpy(scan_cmd->tlv_buffer, scan_cfg->tlv_buf, scan_cfg->tlv_buf_len);

	cmd->command = cpu_to_le16(HostCmd_CMD_802_11_SCAN);

	/* Size is equal to the sizeof(fixed portions) + the TLV len + header */
	cmd->size = cpu_to_le16((u16) (sizeof(scan_cmd->bss_mode)
					  + sizeof(scan_cmd->bssid)
					  + scan_cfg->tlv_buf_len + S_DS_GEN));

	return 0;
}

Project: linux
File: scan.c

int mwifiex_stop_bg_scan(struct mwifiex_private *priv)
{
	struct mwifiex_bg_scan_cfg *bgscan_cfg;

	if (!priv->sched_scanning) {
		dev_dbg(priv->adapter->dev, "bgscan already stopped!\n");
		return 0;
	}

	bgscan_cfg = kzalloc(sizeof(*bgscan_cfg), GFP_KERNEL);
	if (!bgscan_cfg)
		return -ENOMEM;

	bgscan_cfg->bss_type = MWIFIEX_BSS_MODE_INFRA;
	bgscan_cfg->action = MWIFIEX_BGSCAN_ACT_SET;
	bgscan_cfg->enable = false;

	if (mwifiex_send_cmd(priv, HostCmd_CMD_802_11_BG_SCAN_CONFIG,
			     HostCmd_ACT_GEN_SET, 0, bgscan_cfg, true)) {
		kfree(bgscan_cfg);
		return -EFAULT;
	}

	kfree(bgscan_cfg);
	priv->sched_scanning = false;

	return 0;
}

Project: linux
File: scan.c

mwifiex_scan_create_channel_list(struct mwifiex_private *priv,
				 const struct mwifiex_user_scan_cfg
							*user_scan_in,
				 struct mwifiex_chan_scan_param_set
							*scan_chan_list,
				 u8 filtered_scan)
{
	enum nl80211_band band;
	struct ieee80211_supported_band *sband;
	struct ieee80211_channel *ch;
	struct mwifiex_adapter *adapter = priv->adapter;
	int chan_idx = 0, i;

	for (band = 0; (band < NUM_NL80211_BANDS) ; band++) {

		if (!priv->wdev.wiphy->bands[band])
			continue;

		sband = priv->wdev.wiphy->bands[band];

		for (i = 0; (i < sband->n_channels) ; i++) {
			ch = &sband->channels[i];
			if (ch->flags & IEEE80211_CHAN_DISABLED)
				continue;
			scan_chan_list[chan_idx].radio_type = band;

			if (user_scan_in &&
			    user_scan_in->chan_list[0].scan_time)
				scan_chan_list[chan_idx].max_scan_time =
					cpu_to_le16((u16) user_scan_in->
					chan_list[0].scan_time);
			else if ((ch->flags & IEEE80211_CHAN_NO_IR) ||
				 (ch->flags & IEEE80211_CHAN_RADAR))
				scan_chan_list[chan_idx].max_scan_time =
					cpu_to_le16(adapter->passive_scan_time);
			else
				scan_chan_list[chan_idx].max_scan_time =
					cpu_to_le16(adapter->active_scan_time);

			if (ch->flags & IEEE80211_CHAN_NO_IR)
				scan_chan_list[chan_idx].chan_scan_mode_bitmap
					|= (MWIFIEX_PASSIVE_SCAN |
					    MWIFIEX_HIDDEN_SSID_REPORT);
			else
				scan_chan_list[chan_idx].chan_scan_mode_bitmap
					&= ~MWIFIEX_PASSIVE_SCAN;
			scan_chan_list[chan_idx].chan_number =
							(u32) ch->hw_value;

			scan_chan_list[chan_idx].chan_scan_mode_bitmap
					|= MWIFIEX_DISABLE_CHAN_FILT;

			if (filtered_scan &&
			    !((ch->flags & IEEE80211_CHAN_NO_IR) ||
			      (ch->flags & IEEE80211_CHAN_RADAR)))
				scan_chan_list[chan_idx].max_scan_time =
				cpu_to_le16(adapter->specific_scan_time);

			chan_idx++;
		}

	}
	return chan_idx;
}

Project: linux
File: scan.c

static bool mwifiex_is_hidden_ssid(struct cfg80211_ssid *ssid)
{
	int idx;

	for (idx = 0; idx < ssid->ssid_len; idx++) {
		if (ssid->ssid[idx])
			return false;
	}

	return true;
}

Project: linux
File: scan.c

int mwifiex_check_network_compatibility(struct mwifiex_private *priv,
					struct mwifiex_bssdescriptor *bss_desc)
{
	int ret = -1;

	if (!bss_desc)
		return -1;

	if ((mwifiex_get_cfp(priv, (u8) bss_desc->bss_band,
			     (u16) bss_desc->channel, 0))) {
		switch (priv->bss_mode) {
		case NL80211_IFTYPE_STATION:
		case NL80211_IFTYPE_ADHOC:
			ret = mwifiex_is_network_compatible(priv, bss_desc,
							    priv->bss_mode);
			if (ret)
				mwifiex_dbg(priv->adapter, ERROR,
					    "Incompatible network settings\n");
			break;
		default:
			ret = 0;
		}
	}

	return ret;
}

Project: linux
File: scan.c

mwifiex_active_scan_req_for_passive_chan(struct mwifiex_private *priv)
{
	int ret;
	struct mwifiex_adapter *adapter = priv->adapter;
	u8 id = 0;
	struct mwifiex_user_scan_cfg  *user_scan_cfg;

	if (adapter->active_scan_triggered || !priv->scan_request ||
	    priv->scan_aborting) {
		adapter->active_scan_triggered = false;
		return 0;
	}

	if (!priv->hidden_chan[0].chan_number) {
		mwifiex_dbg(adapter, INFO, "No BSS with hidden SSID found on DFS channels\n");
		return 0;
	}
	user_scan_cfg = kzalloc(sizeof(*user_scan_cfg), GFP_KERNEL);

	if (!user_scan_cfg)
		return -ENOMEM;

	for (id = 0; id < MWIFIEX_USER_SCAN_CHAN_MAX; id++) {
		if (!priv->hidden_chan[id].chan_number)
			break;
		memcpy(&user_scan_cfg->chan_list[id],
		       &priv->hidden_chan[id],
		       sizeof(struct mwifiex_user_scan_chan));
	}

	adapter->active_scan_triggered = true;
	if (priv->scan_request->flags & NL80211_SCAN_FLAG_RANDOM_ADDR)
		ether_addr_copy(user_scan_cfg->random_mac,
				priv->scan_request->mac_addr);
	user_scan_cfg->num_ssids = priv->scan_request->n_ssids;
	user_scan_cfg->ssid_list = priv->scan_request->ssids;

	ret = mwifiex_scan_networks(priv, user_scan_cfg);
	kfree(user_scan_cfg);

	memset(&priv->hidden_chan, 0, sizeof(priv->hidden_chan));

	if (ret) {
		dev_err(priv->adapter->dev, "scan failed: %d\n", ret);
		return ret;
	}

	return 0;
}

Project: linux
File: scan.c

int mwifiex_handle_event_ext_scan_report(struct mwifiex_private *priv,
					 void *buf)
{
	int ret = 0;
	struct mwifiex_adapter *adapter = priv->adapter;
	u8 *bss_info;
	u32 bytes_left, bytes_left_for_tlv, idx;
	u16 type, len;
	struct mwifiex_ie_types_data *tlv;
	struct mwifiex_ie_types_bss_scan_rsp *scan_rsp_tlv;
	struct mwifiex_ie_types_bss_scan_info *scan_info_tlv;
	u8 *radio_type;
	u64 fw_tsf = 0;
	s32 rssi = 0;
	struct mwifiex_event_scan_result *event_scan = buf;
	u8 num_of_set = event_scan->num_of_set;
	u8 *scan_resp = buf + sizeof(struct mwifiex_event_scan_result);
	u16 scan_resp_size = le16_to_cpu(event_scan->buf_size);

	if (num_of_set > MWIFIEX_MAX_AP) {
		mwifiex_dbg(adapter, ERROR,
			    "EXT_SCAN: Invalid number of AP returned (%d)!!\n",
			    num_of_set);
		ret = -1;
		goto check_next_scan;
	}

	bytes_left = scan_resp_size;
	mwifiex_dbg(adapter, INFO,
		    "EXT_SCAN: size %d, returned %d APs...",
		    scan_resp_size, num_of_set);
	mwifiex_dbg_dump(adapter, CMD_D, "EXT_SCAN buffer:", buf,
			 scan_resp_size +
			 sizeof(struct mwifiex_event_scan_result));

	tlv = (struct mwifiex_ie_types_data *)scan_resp;

	for (idx = 0; idx < num_of_set && bytes_left; idx++) {
		type = le16_to_cpu(tlv->header.type);
		len = le16_to_cpu(tlv->header.len);
		if (bytes_left < sizeof(struct mwifiex_ie_types_header) + len) {
			mwifiex_dbg(adapter, ERROR,
				    "EXT_SCAN: Error bytes left < TLV length\n");
			break;
		}
		scan_rsp_tlv = NULL;
		scan_info_tlv = NULL;
		bytes_left_for_tlv = bytes_left;

		/* BSS response TLV with beacon or probe response buffer
		 * at the initial position of each descriptor
		 */
		if (type != TLV_TYPE_BSS_SCAN_RSP)
			break;

		bss_info = (u8 *)tlv;
		scan_rsp_tlv = (struct mwifiex_ie_types_bss_scan_rsp *)tlv;
		tlv = (struct mwifiex_ie_types_data *)(tlv->data + len);
		bytes_left_for_tlv -=
				(len + sizeof(struct mwifiex_ie_types_header));

		while (bytes_left_for_tlv >=
		       sizeof(struct mwifiex_ie_types_header) &&
		       le16_to_cpu(tlv->header.type) != TLV_TYPE_BSS_SCAN_RSP) {
			type = le16_to_cpu(tlv->header.type);
			len = le16_to_cpu(tlv->header.len);
			if (bytes_left_for_tlv <
			    sizeof(struct mwifiex_ie_types_header) + len) {
				mwifiex_dbg(adapter, ERROR,
					    "EXT_SCAN: Error in processing TLV,\t"
					    "bytes left < TLV length\n");
				scan_rsp_tlv = NULL;
				bytes_left_for_tlv = 0;
				continue;
			}
			switch (type) {
			case TLV_TYPE_BSS_SCAN_INFO:
				scan_info_tlv =
				  (struct mwifiex_ie_types_bss_scan_info *)tlv;
				if (len !=
				 sizeof(struct mwifiex_ie_types_bss_scan_info) -
				 sizeof(struct mwifiex_ie_types_header)) {
					bytes_left_for_tlv = 0;
					continue;
				}
				break;
			default:
				break;
			}
			tlv = (struct mwifiex_ie_types_data *)(tlv->data + len);
			bytes_left -=
				(len + sizeof(struct mwifiex_ie_types_header));
			bytes_left_for_tlv -=
				(len + sizeof(struct mwifiex_ie_types_header));
		}

		if (!scan_rsp_tlv)
			break;

		/* Advance pointer to the beacon buffer length and
		 * update the bytes count so that the function
		 * wlan_interpret_bss_desc_with_ie() can handle the
		 * scan buffer withut any change
		 */
		bss_info += sizeof(u16);
		bytes_left -= sizeof(u16);

		if (scan_info_tlv) {
			rssi = (s32)(s16)(le16_to_cpu(scan_info_tlv->rssi));
			rssi *= 100;           /* Convert dBm to mBm */
			mwifiex_dbg(adapter, INFO,
				    "info: InterpretIE: RSSI=%d\n", rssi);
			fw_tsf = le64_to_cpu(scan_info_tlv->tsf);
			radio_type = &scan_info_tlv->radio_type;
		} else {
			radio_type = NULL;
		}
		ret = mwifiex_parse_single_response_buf(priv, &bss_info,
							&bytes_left, fw_tsf,
							radio_type, true, rssi);
		if (ret)
			goto check_next_scan;
	}

check_next_scan:
	if (!event_scan->more_event)
		mwifiex_check_next_scan_command(priv);

	return ret;
}

Project: linux
File: scan.c

mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2)
{
	if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len))
		return -1;
	return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len);
}

Project: linux
File: scan.c

mwifiex_ret_802_11_scan_get_tlv_ptrs(struct mwifiex_adapter *adapter,
				     struct mwifiex_ie_types_data *tlv,
				     u32 tlv_buf_size, u32 req_tlv_type,
				     struct mwifiex_ie_types_data **tlv_data)
{
	struct mwifiex_ie_types_data *current_tlv;
	u32 tlv_buf_left;
	u32 tlv_type;
	u32 tlv_len;

	current_tlv = tlv;
	tlv_buf_left = tlv_buf_size;
	*tlv_data = NULL;

	mwifiex_dbg(adapter, INFO,
		    "info: SCAN_RESP: tlv_buf_size = %d\n",
		    tlv_buf_size);

	while (tlv_buf_left >= sizeof(struct mwifiex_ie_types_header)) {

		tlv_type = le16_to_cpu(current_tlv->header.type);
		tlv_len = le16_to_cpu(current_tlv->header.len);

		if (sizeof(tlv->header) + tlv_len > tlv_buf_left) {
			mwifiex_dbg(adapter, ERROR,
				    "SCAN_RESP: TLV buffer corrupt\n");
			break;
		}

		if (req_tlv_type == tlv_type) {
			switch (tlv_type) {
			case TLV_TYPE_TSFTIMESTAMP:
				mwifiex_dbg(adapter, INFO,
					    "info: SCAN_RESP: TSF\t"
					    "timestamp TLV, len = %d\n",
					    tlv_len);
				*tlv_data = current_tlv;
				break;
			case TLV_TYPE_CHANNELBANDLIST:
				mwifiex_dbg(adapter, INFO,
					    "info: SCAN_RESP: channel\t"
					    "band list TLV, len = %d\n",
					    tlv_len);
				*tlv_data = current_tlv;
				break;
			default:
				mwifiex_dbg(adapter, ERROR,
					    "SCAN_RESP: unhandled TLV = %d\n",
					    tlv_type);
				/* Give up, this seems corrupted */
				return;
			}
		}

		if (*tlv_data)
			break;


		tlv_buf_left -= (sizeof(tlv->header) + tlv_len);
		current_tlv =
			(struct mwifiex_ie_types_data *) (current_tlv->data +
							  tlv_len);

	}			/* while */
}

Project: linux
File: scan.c

int mwifiex_ret_802_11_scan_ext(struct mwifiex_private *priv,
				struct host_cmd_ds_command *resp)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	struct host_cmd_ds_802_11_scan_ext *ext_scan_resp;
	struct mwifiex_ie_types_header *tlv;
	struct mwifiex_ietypes_chanstats *tlv_stat;
	u16 buf_left, type, len;

	struct host_cmd_ds_command *cmd_ptr;
	struct cmd_ctrl_node *cmd_node;
	bool complete_scan = false;

	mwifiex_dbg(adapter, INFO, "info: EXT scan returns successfully\n");

	ext_scan_resp = &resp->params.ext_scan;

	tlv = (void *)ext_scan_resp->tlv_buffer;
	buf_left = le16_to_cpu(resp->size) - (sizeof(*ext_scan_resp) + S_DS_GEN
					      - 1);

	while (buf_left >= sizeof(struct mwifiex_ie_types_header)) {
		type = le16_to_cpu(tlv->type);
		len = le16_to_cpu(tlv->len);

		if (buf_left < (sizeof(struct mwifiex_ie_types_header) + len)) {
			mwifiex_dbg(adapter, ERROR,
				    "error processing scan response TLVs");
			break;
		}

		switch (type) {
		case TLV_TYPE_CHANNEL_STATS:
			tlv_stat = (void *)tlv;
			mwifiex_update_chan_statistics(priv, tlv_stat);
			break;
		default:
			break;
		}

		buf_left -= len + sizeof(struct mwifiex_ie_types_header);
		tlv = (void *)((u8 *)tlv + len +
			       sizeof(struct mwifiex_ie_types_header));
	}

	spin_lock_bh(&adapter->cmd_pending_q_lock);
	spin_lock_bh(&adapter->scan_pending_q_lock);
	if (list_empty(&adapter->scan_pending_q)) {
		complete_scan = true;
		list_for_each_entry(cmd_node, &adapter->cmd_pending_q, list) {
			cmd_ptr = (void *)cmd_node->cmd_skb->data;
			if (le16_to_cpu(cmd_ptr->command) ==
			    HostCmd_CMD_802_11_SCAN_EXT) {
				mwifiex_dbg(adapter, INFO,
					    "Scan pending in command pending list");
				complete_scan = false;
				break;
			}
		}
	}
	spin_unlock_bh(&adapter->scan_pending_q_lock);
	spin_unlock_bh(&adapter->cmd_pending_q_lock);

	if (complete_scan)
		mwifiex_complete_scan(priv);

	return 0;
}

Project: linux
File: scan.c

mwifiex_config_scan(struct mwifiex_private *priv,
		    const struct mwifiex_user_scan_cfg *user_scan_in,
		    struct mwifiex_scan_cmd_config *scan_cfg_out,
		    struct mwifiex_ie_types_chan_list_param_set **chan_list_out,
		    struct mwifiex_chan_scan_param_set *scan_chan_list,
		    u8 *max_chan_per_scan, u8 *filtered_scan,
		    u8 *scan_current_only)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	struct mwifiex_ie_types_num_probes *num_probes_tlv;
	struct mwifiex_ie_types_scan_chan_gap *chan_gap_tlv;
	struct mwifiex_ie_types_random_mac *random_mac_tlv;
	struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
	struct mwifiex_ie_types_bssid_list *bssid_tlv;
	u8 *tlv_pos;
	u32 num_probes;
	u32 ssid_len;
	u32 chan_idx;
	u32 scan_type;
	u16 scan_dur;
	u8 channel;
	u8 radio_type;
	int i;
	u8 ssid_filter;
	struct mwifiex_ie_types_htcap *ht_cap;
	struct mwifiex_ie_types_bss_mode *bss_mode;
	const u8 zero_mac[6] = {0, 0, 0, 0, 0, 0};

	/* The tlv_buf_len is calculated for each scan command.  The TLVs added
	   in this routine will be preserved since the routine that sends the
	   command will append channelTLVs at *chan_list_out.  The difference
	   between the *chan_list_out and the tlv_buf start will be used to
	   calculate the size of anything we add in this routine. */
	scan_cfg_out->tlv_buf_len = 0;

	/* Running tlv pointer.  Assigned to chan_list_out at end of function
	   so later routines know where channels can be added to the command
	   buf */
	tlv_pos = scan_cfg_out->tlv_buf;

	/* Initialize the scan as un-filtered; the flag is later set to TRUE
	   below if a SSID or BSSID filter is sent in the command */
	*filtered_scan = false;

	/* Initialize the scan as not being only on the current channel.  If
	   the channel list is customized, only contains one channel, and is
	   the active channel, this is set true and data flow is not halted. */
	*scan_current_only = false;

	if (user_scan_in) {
		u8 tmpaddr[ETH_ALEN];

		/* Default the ssid_filter flag to TRUE, set false under
		   certain wildcard conditions and qualified by the existence
		   of an SSID list before marking the scan as filtered */
		ssid_filter = true;

		/* Set the BSS type scan filter, use Adapter setting if
		   unset */
		scan_cfg_out->bss_mode =
			(u8)(user_scan_in->bss_mode ?: adapter->scan_mode);

		/* Set the number of probes to send, use Adapter setting
		   if unset */
		num_probes = user_scan_in->num_probes ?: adapter->scan_probes;

		/*
		 * Set the BSSID filter to the incoming configuration,
		 * if non-zero.  If not set, it will remain disabled
		 * (all zeros).
		 */
		memcpy(scan_cfg_out->specific_bssid,
		       user_scan_in->specific_bssid,
		       sizeof(scan_cfg_out->specific_bssid));

		memcpy(tmpaddr, scan_cfg_out->specific_bssid, ETH_ALEN);

		if (adapter->ext_scan &&
		    !is_zero_ether_addr(tmpaddr)) {
			bssid_tlv =
				(struct mwifiex_ie_types_bssid_list *)tlv_pos;
			bssid_tlv->header.type = cpu_to_le16(TLV_TYPE_BSSID);
			bssid_tlv->header.len = cpu_to_le16(ETH_ALEN);
			memcpy(bssid_tlv->bssid, user_scan_in->specific_bssid,
			       ETH_ALEN);
			tlv_pos += sizeof(struct mwifiex_ie_types_bssid_list);
		}

		for (i = 0; i < user_scan_in->num_ssids; i++) {
			ssid_len = user_scan_in->ssid_list[i].ssid_len;

			wildcard_ssid_tlv =
				(struct mwifiex_ie_types_wildcard_ssid_params *)
				tlv_pos;
			wildcard_ssid_tlv->header.type =
				cpu_to_le16(TLV_TYPE_WILDCARDSSID);
			wildcard_ssid_tlv->header.len = cpu_to_le16(
				(u16) (ssid_len + sizeof(wildcard_ssid_tlv->
							 max_ssid_length)));

			/*
			 * max_ssid_length = 0 tells firmware to perform
			 * specific scan for the SSID filled, whereas
			 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
			 * wildcard scan.
			 */
			if (ssid_len)
				wildcard_ssid_tlv->max_ssid_length = 0;
			else
				wildcard_ssid_tlv->max_ssid_length =
							IEEE80211_MAX_SSID_LEN;

			if (!memcmp(user_scan_in->ssid_list[i].ssid,
				    "DIRECT-", 7))
				wildcard_ssid_tlv->max_ssid_length = 0xfe;

			memcpy(wildcard_ssid_tlv->ssid,
			       user_scan_in->ssid_list[i].ssid, ssid_len);

			tlv_pos += (sizeof(wildcard_ssid_tlv->header)
				+ le16_to_cpu(wildcard_ssid_tlv->header.len));

			mwifiex_dbg(adapter, INFO,
				    "info: scan: ssid[%d]: %s, %d\n",
				    i, wildcard_ssid_tlv->ssid,
				    wildcard_ssid_tlv->max_ssid_length);

			/* Empty wildcard ssid with a maxlen will match many or
			   potentially all SSIDs (maxlen == 32), therefore do
			   not treat the scan as
			   filtered. */
			if (!ssid_len && wildcard_ssid_tlv->max_ssid_length)
				ssid_filter = false;
		}

		/*
		 *  The default number of channels sent in the command is low to
		 *  ensure the response buffer from the firmware does not
		 *  truncate scan results.  That is not an issue with an SSID
		 *  or BSSID filter applied to the scan results in the firmware.
		 */
		memcpy(tmpaddr, scan_cfg_out->specific_bssid, ETH_ALEN);
		if ((i && ssid_filter) ||
		    !is_zero_ether_addr(tmpaddr))
			*filtered_scan = true;

		if (user_scan_in->scan_chan_gap) {
			mwifiex_dbg(adapter, INFO,
				    "info: scan: channel gap = %d\n",
				    user_scan_in->scan_chan_gap);
			*max_chan_per_scan =
					MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;

			chan_gap_tlv = (void *)tlv_pos;
			chan_gap_tlv->header.type =
					 cpu_to_le16(TLV_TYPE_SCAN_CHANNEL_GAP);
			chan_gap_tlv->header.len =
				    cpu_to_le16(sizeof(chan_gap_tlv->chan_gap));
			chan_gap_tlv->chan_gap =
				     cpu_to_le16((user_scan_in->scan_chan_gap));
			tlv_pos +=
				  sizeof(struct mwifiex_ie_types_scan_chan_gap);
		}

		if (!ether_addr_equal(user_scan_in->random_mac, zero_mac)) {
			random_mac_tlv = (void *)tlv_pos;
			random_mac_tlv->header.type =
					 cpu_to_le16(TLV_TYPE_RANDOM_MAC);
			random_mac_tlv->header.len =
				    cpu_to_le16(sizeof(random_mac_tlv->mac));
			ether_addr_copy(random_mac_tlv->mac,
					user_scan_in->random_mac);
			tlv_pos +=
				  sizeof(struct mwifiex_ie_types_random_mac);
		}
	} else {
		scan_cfg_out->bss_mode = (u8) adapter->scan_mode;
		num_probes = adapter->scan_probes;
	}

	/*
	 *  If a specific BSSID or SSID is used, the number of channels in the
	 *  scan command will be increased to the absolute maximum.
	 */
	if (*filtered_scan) {
		*max_chan_per_scan = MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN;
	} else {
		if (!priv->media_connected)
			*max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD;
		else
			*max_chan_per_scan =
					MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD / 2;
	}

	if (adapter->ext_scan) {
		bss_mode = (struct mwifiex_ie_types_bss_mode *)tlv_pos;
		bss_mode->header.type = cpu_to_le16(TLV_TYPE_BSS_MODE);
		bss_mode->header.len = cpu_to_le16(sizeof(bss_mode->bss_mode));
		bss_mode->bss_mode = scan_cfg_out->bss_mode;
		tlv_pos += sizeof(bss_mode->header) +
			   le16_to_cpu(bss_mode->header.len);
	}

	/* If the input config or adapter has the number of Probes set,
	   add tlv */
	if (num_probes) {

		mwifiex_dbg(adapter, INFO,
			    "info: scan: num_probes = %d\n",
			    num_probes);

		num_probes_tlv = (struct mwifiex_ie_types_num_probes *) tlv_pos;
		num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
		num_probes_tlv->header.len =
			cpu_to_le16(sizeof(num_probes_tlv->num_probes));
		num_probes_tlv->num_probes = cpu_to_le16((u16) num_probes);

		tlv_pos += sizeof(num_probes_tlv->header) +
			le16_to_cpu(num_probes_tlv->header.len);

	}

	if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
	    (priv->adapter->config_bands & BAND_GN ||
	     priv->adapter->config_bands & BAND_AN)) {
		ht_cap = (struct mwifiex_ie_types_htcap *) tlv_pos;
		memset(ht_cap, 0, sizeof(struct mwifiex_ie_types_htcap));
		ht_cap->header.type = cpu_to_le16(WLAN_EID_HT_CAPABILITY);
		ht_cap->header.len =
				cpu_to_le16(sizeof(struct ieee80211_ht_cap));
		radio_type =
			mwifiex_band_to_radio_type(priv->adapter->config_bands);
		mwifiex_fill_cap_info(priv, radio_type, &ht_cap->ht_cap);
		tlv_pos += sizeof(struct mwifiex_ie_types_htcap);
	}

	/* Append vendor specific IE TLV */
	mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_SCAN, &tlv_pos);

	/*
	 * Set the output for the channel TLV to the address in the tlv buffer
	 *   past any TLVs that were added in this function (SSID, num_probes).
	 *   Channel TLVs will be added past this for each scan command,
	 *   preserving the TLVs that were previously added.
	 */
	*chan_list_out =
		(struct mwifiex_ie_types_chan_list_param_set *) tlv_pos;

	if (user_scan_in && user_scan_in->chan_list[0].chan_number) {

		mwifiex_dbg(adapter, INFO,
			    "info: Scan: Using supplied channel list\n");

		for (chan_idx = 0;
		     chan_idx < MWIFIEX_USER_SCAN_CHAN_MAX &&
		     user_scan_in->chan_list[chan_idx].chan_number;
		     chan_idx++) {

			channel = user_scan_in->chan_list[chan_idx].chan_number;
			scan_chan_list[chan_idx].chan_number = channel;

			radio_type =
				user_scan_in->chan_list[chan_idx].radio_type;
			scan_chan_list[chan_idx].radio_type = radio_type;

			scan_type = user_scan_in->chan_list[chan_idx].scan_type;

			if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
				scan_chan_list[chan_idx].chan_scan_mode_bitmap
					|= (MWIFIEX_PASSIVE_SCAN |
					    MWIFIEX_HIDDEN_SSID_REPORT);
			else
				scan_chan_list[chan_idx].chan_scan_mode_bitmap
					&= ~MWIFIEX_PASSIVE_SCAN;

			scan_chan_list[chan_idx].chan_scan_mode_bitmap
				|= MWIFIEX_DISABLE_CHAN_FILT;

			if (user_scan_in->chan_list[chan_idx].scan_time) {
				scan_dur = (u16) user_scan_in->
					chan_list[chan_idx].scan_time;
			} else {
				if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
					scan_dur = adapter->passive_scan_time;
				else if (*filtered_scan)
					scan_dur = adapter->specific_scan_time;
				else
					scan_dur = adapter->active_scan_time;
			}

			scan_chan_list[chan_idx].min_scan_time =
				cpu_to_le16(scan_dur);
			scan_chan_list[chan_idx].max_scan_time =
				cpu_to_le16(scan_dur);
		}

		/* Check if we are only scanning the current channel */
		if ((chan_idx == 1) &&
		    (user_scan_in->chan_list[0].chan_number ==
		     priv->curr_bss_params.bss_descriptor.channel)) {
			*scan_current_only = true;
			mwifiex_dbg(adapter, INFO,
				    "info: Scan: Scanning current channel only\n");
		}
	} else {
		mwifiex_dbg(adapter, INFO,
			    "info: Scan: Creating full region channel list\n");
		mwifiex_scan_create_channel_list(priv, user_scan_in,
						 scan_chan_list,
						 *filtered_scan);
	}

}

Project: linux
File: scan.c

int mwifiex_cmd_802_11_bg_scan_query(struct host_cmd_ds_command *cmd)
{
	struct host_cmd_ds_802_11_bg_scan_query *bg_query =
		&cmd->params.bg_scan_query;

	cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_QUERY);
	cmd->size = cpu_to_le16(sizeof(struct host_cmd_ds_802_11_bg_scan_query)
				+ S_DS_GEN);

	bg_query->flush = 1;

	return 0;
}

Project: linux
File: scan.c

void mwifiex_cancel_scan(struct mwifiex_adapter *adapter)
{
	struct mwifiex_private *priv;
	int i;

	mwifiex_cancel_pending_scan_cmd(adapter);

	if (adapter->scan_processing) {
		spin_lock_bh(&adapter->mwifiex_cmd_lock);
		adapter->scan_processing = false;
		spin_unlock_bh(&adapter->mwifiex_cmd_lock);
		for (i = 0; i < adapter->priv_num; i++) {
			priv = adapter->priv[i];
			if (!priv)
				continue;
			if (priv->scan_request) {
				struct cfg80211_scan_info info = {
					.aborted = true,
				};

				mwifiex_dbg(adapter, INFO,
					    "info: aborting scan\n");
				cfg80211_scan_done(priv->scan_request, &info);
				priv->scan_request = NULL;
				priv->scan_aborting = false;
			}
		}
	}
}

Project: linux
File: scan.c

mwifiex_cmd_append_vsie_tlv(struct mwifiex_private *priv,
			    u16 vsie_mask, u8 **buffer)
{
	int id, ret_len = 0;
	struct mwifiex_ie_types_vendor_param_set *vs_param_set;

	if (!buffer)
		return 0;
	if (!(*buffer))
		return 0;

	/*
	 * Traverse through the saved vendor specific IE array and append
	 * the selected(scan/assoc/adhoc) IE as TLV to the command
	 */
	for (id = 0; id < MWIFIEX_MAX_VSIE_NUM; id++) {
		if (priv->vs_ie[id].mask & vsie_mask) {
			vs_param_set =
				(struct mwifiex_ie_types_vendor_param_set *)
				*buffer;
			vs_param_set->header.type =
				cpu_to_le16(TLV_TYPE_PASSTHROUGH);
			vs_param_set->header.len =
				cpu_to_le16((((u16) priv->vs_ie[id].ie[1])
				& 0x00FF) + 2);
			if (le16_to_cpu(vs_param_set->header.len) >
				MWIFIEX_MAX_VSIE_LEN) {
				mwifiex_dbg(priv->adapter, ERROR,
					    "Invalid param length!\n");
				break;
			}

			memcpy(vs_param_set->ie, priv->vs_ie[id].ie,
			       le16_to_cpu(vs_param_set->header.len));
			*buffer += le16_to_cpu(vs_param_set->header.len) +
				   sizeof(struct mwifiex_ie_types_header);
			ret_len += le16_to_cpu(vs_param_set->header.len) +
				   sizeof(struct mwifiex_ie_types_header);
		}
	}
	return ret_len;
}

Project: linux
File: scan.c

mwifiex_is_bss_wapi(struct mwifiex_private *priv,
		    struct mwifiex_bssdescriptor *bss_desc)
{
	if (priv->sec_info.wapi_enabled &&
	    has_ieee_hdr(bss_desc->bcn_wapi_ie, WLAN_EID_BSS_AC_ACCESS_DELAY))
		return true;
	return false;
}

Project: linux
File: scan.c

int mwifiex_cmd_802_11_bg_scan_config(struct mwifiex_private *priv,
				      struct host_cmd_ds_command *cmd,
				      void *data_buf)
{
	struct host_cmd_ds_802_11_bg_scan_config *bgscan_config =
					&cmd->params.bg_scan_config;
	struct mwifiex_bg_scan_cfg *bgscan_cfg_in = data_buf;
	u8 *tlv_pos = bgscan_config->tlv;
	u8 num_probes;
	u32 ssid_len, chan_idx, scan_type, scan_dur, chan_num;
	int i;
	struct mwifiex_ie_types_num_probes *num_probes_tlv;
	struct mwifiex_ie_types_repeat_count *repeat_count_tlv;
	struct mwifiex_ie_types_min_rssi_threshold *rssi_threshold_tlv;
	struct mwifiex_ie_types_bgscan_start_later *start_later_tlv;
	struct mwifiex_ie_types_wildcard_ssid_params *wildcard_ssid_tlv;
	struct mwifiex_ie_types_chan_list_param_set *chan_list_tlv;
	struct mwifiex_chan_scan_param_set *temp_chan;

	cmd->command = cpu_to_le16(HostCmd_CMD_802_11_BG_SCAN_CONFIG);
	cmd->size = cpu_to_le16(sizeof(*bgscan_config) + S_DS_GEN);

	bgscan_config->action = cpu_to_le16(bgscan_cfg_in->action);
	bgscan_config->enable = bgscan_cfg_in->enable;
	bgscan_config->bss_type = bgscan_cfg_in->bss_type;
	bgscan_config->scan_interval =
		cpu_to_le32(bgscan_cfg_in->scan_interval);
	bgscan_config->report_condition =
		cpu_to_le32(bgscan_cfg_in->report_condition);

	/*  stop sched scan  */
	if (!bgscan_config->enable)
		return 0;

	bgscan_config->chan_per_scan = bgscan_cfg_in->chan_per_scan;

	num_probes = (bgscan_cfg_in->num_probes ? bgscan_cfg_in->
		      num_probes : priv->adapter->scan_probes);

	if (num_probes) {
		num_probes_tlv = (struct mwifiex_ie_types_num_probes *)tlv_pos;
		num_probes_tlv->header.type = cpu_to_le16(TLV_TYPE_NUMPROBES);
		num_probes_tlv->header.len =
			cpu_to_le16(sizeof(num_probes_tlv->num_probes));
		num_probes_tlv->num_probes = cpu_to_le16((u16)num_probes);

		tlv_pos += sizeof(num_probes_tlv->header) +
			le16_to_cpu(num_probes_tlv->header.len);
	}

	if (bgscan_cfg_in->repeat_count) {
		repeat_count_tlv =
			(struct mwifiex_ie_types_repeat_count *)tlv_pos;
		repeat_count_tlv->header.type =
			cpu_to_le16(TLV_TYPE_REPEAT_COUNT);
		repeat_count_tlv->header.len =
			cpu_to_le16(sizeof(repeat_count_tlv->repeat_count));
		repeat_count_tlv->repeat_count =
			cpu_to_le16(bgscan_cfg_in->repeat_count);

		tlv_pos += sizeof(repeat_count_tlv->header) +
			le16_to_cpu(repeat_count_tlv->header.len);
	}

	if (bgscan_cfg_in->rssi_threshold) {
		rssi_threshold_tlv =
			(struct mwifiex_ie_types_min_rssi_threshold *)tlv_pos;
		rssi_threshold_tlv->header.type =
			cpu_to_le16(TLV_TYPE_RSSI_LOW);
		rssi_threshold_tlv->header.len =
			cpu_to_le16(sizeof(rssi_threshold_tlv->rssi_threshold));
		rssi_threshold_tlv->rssi_threshold =
			cpu_to_le16(bgscan_cfg_in->rssi_threshold);

		tlv_pos += sizeof(rssi_threshold_tlv->header) +
			le16_to_cpu(rssi_threshold_tlv->header.len);
	}

	for (i = 0; i < bgscan_cfg_in->num_ssids; i++) {
		ssid_len = bgscan_cfg_in->ssid_list[i].ssid.ssid_len;

		wildcard_ssid_tlv =
			(struct mwifiex_ie_types_wildcard_ssid_params *)tlv_pos;
		wildcard_ssid_tlv->header.type =
				cpu_to_le16(TLV_TYPE_WILDCARDSSID);
		wildcard_ssid_tlv->header.len = cpu_to_le16(
				(u16)(ssid_len + sizeof(wildcard_ssid_tlv->
							 max_ssid_length)));

		/* max_ssid_length = 0 tells firmware to perform
		 * specific scan for the SSID filled, whereas
		 * max_ssid_length = IEEE80211_MAX_SSID_LEN is for
		 * wildcard scan.
		 */
		if (ssid_len)
			wildcard_ssid_tlv->max_ssid_length = 0;
		else
			wildcard_ssid_tlv->max_ssid_length =
						IEEE80211_MAX_SSID_LEN;

		memcpy(wildcard_ssid_tlv->ssid,
		       bgscan_cfg_in->ssid_list[i].ssid.ssid, ssid_len);

		tlv_pos += (sizeof(wildcard_ssid_tlv->header)
				+ le16_to_cpu(wildcard_ssid_tlv->header.len));
	}

	chan_list_tlv = (struct mwifiex_ie_types_chan_list_param_set *)tlv_pos;

	if (bgscan_cfg_in->chan_list[0].chan_number) {
		dev_dbg(priv->adapter->dev, "info: bgscan: Using supplied channel list\n");

		chan_list_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);

		for (chan_idx = 0;
		     chan_idx < MWIFIEX_BG_SCAN_CHAN_MAX &&
		     bgscan_cfg_in->chan_list[chan_idx].chan_number;
		     chan_idx++) {
			temp_chan = chan_list_tlv->chan_scan_param + chan_idx;

			/* Increment the TLV header length by size appended */
			le16_unaligned_add_cpu(&chan_list_tlv->header.len,
					       sizeof(
					       chan_list_tlv->chan_scan_param));

			temp_chan->chan_number =
				bgscan_cfg_in->chan_list[chan_idx].chan_number;
			temp_chan->radio_type =
				bgscan_cfg_in->chan_list[chan_idx].radio_type;

			scan_type =
				bgscan_cfg_in->chan_list[chan_idx].scan_type;

			if (scan_type == MWIFIEX_SCAN_TYPE_PASSIVE)
				temp_chan->chan_scan_mode_bitmap
					|= MWIFIEX_PASSIVE_SCAN;
			else
				temp_chan->chan_scan_mode_bitmap
					&= ~MWIFIEX_PASSIVE_SCAN;

			if (bgscan_cfg_in->chan_list[chan_idx].scan_time) {
				scan_dur = (u16)bgscan_cfg_in->
					chan_list[chan_idx].scan_time;
			} else {
				scan_dur = (scan_type ==
					    MWIFIEX_SCAN_TYPE_PASSIVE) ?
					    priv->adapter->passive_scan_time :
					    priv->adapter->specific_scan_time;
			}

			temp_chan->min_scan_time = cpu_to_le16(scan_dur);
			temp_chan->max_scan_time = cpu_to_le16(scan_dur);
		}
	} else {
		dev_dbg(priv->adapter->dev,
			"info: bgscan: Creating full region channel list\n");
		chan_num =
			mwifiex_bgscan_create_channel_list(priv, bgscan_cfg_in,
							   chan_list_tlv->
							   chan_scan_param);
		le16_unaligned_add_cpu(&chan_list_tlv->header.len,
				       chan_num *
			     sizeof(chan_list_tlv->chan_scan_param[0]));
	}

	tlv_pos += (sizeof(chan_list_tlv->header)
			+ le16_to_cpu(chan_list_tlv->header.len));

	if (bgscan_cfg_in->start_later) {
		start_later_tlv =
			(struct mwifiex_ie_types_bgscan_start_later *)tlv_pos;
		start_later_tlv->header.type =
			cpu_to_le16(TLV_TYPE_BGSCAN_START_LATER);
		start_later_tlv->header.len =
			cpu_to_le16(sizeof(start_later_tlv->start_later));
		start_later_tlv->start_later =
			cpu_to_le16(bgscan_cfg_in->start_later);

		tlv_pos += sizeof(start_later_tlv->header) +
			le16_to_cpu(start_later_tlv->header.len);
	}

	/* Append vendor specific IE TLV */
	mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_BGSCAN, &tlv_pos);

	le16_unaligned_add_cpu(&cmd->size, tlv_pos - bgscan_config->tlv);

	return 0;
}

Project: linux
File: scan.c

mwifiex_append_rate_tlv(struct mwifiex_private *priv,
			struct mwifiex_scan_cmd_config *scan_cfg_out,
			u8 radio)
{
	struct mwifiex_ie_types_rates_param_set *rates_tlv;
	u8 rates[MWIFIEX_SUPPORTED_RATES], *tlv_pos;
	u32 rates_size;

	memset(rates, 0, sizeof(rates));

	tlv_pos = (u8 *)scan_cfg_out->tlv_buf + scan_cfg_out->tlv_buf_len;

	if (priv->scan_request)
		rates_size = mwifiex_get_rates_from_cfg80211(priv, rates,
							     radio);
	else
		rates_size = mwifiex_get_supported_rates(priv, rates);

	mwifiex_dbg(priv->adapter, CMD,
		    "info: SCAN_CMD: Rates size = %d\n",
		rates_size);
	rates_tlv = (struct mwifiex_ie_types_rates_param_set *)tlv_pos;
	rates_tlv->header.type = cpu_to_le16(WLAN_EID_SUPP_RATES);
	rates_tlv->header.len = cpu_to_le16((u16) rates_size);
	memcpy(rates_tlv->rates, rates, rates_size);
	scan_cfg_out->tlv_buf_len += sizeof(rates_tlv->header) + rates_size;

	return rates_size;
}

Project: linux
File: scan.c

mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv,
			 struct mwifiex_bssdescriptor *bss_desc)
{
	if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
	    !priv->sec_info.wpa2_enabled &&
	    !has_vendor_hdr(bss_desc->bcn_wpa_ie, WLAN_EID_VENDOR_SPECIFIC) &&
	    !has_ieee_hdr(bss_desc->bcn_rsn_ie, WLAN_EID_RSN) &&
	    !priv->sec_info.encryption_mode && bss_desc->privacy) {
		return true;
	}
	return false;
}

Project: linux
File: scan.c

mwifiex_is_network_compatible(struct mwifiex_private *priv,
			      struct mwifiex_bssdescriptor *bss_desc, u32 mode)
{
	struct mwifiex_adapter *adapter = priv->adapter;

	bss_desc->disable_11n = false;

	/* Don't check for compatibility if roaming */
	if (priv->media_connected &&
	    (priv->bss_mode == NL80211_IFTYPE_STATION) &&
	    (bss_desc->bss_mode == NL80211_IFTYPE_STATION))
		return 0;

	if (priv->wps.session_enable) {
		mwifiex_dbg(adapter, IOCTL,
			    "info: return success directly in WPS period\n");
		return 0;
	}

	if (bss_desc->chan_sw_ie_present) {
		mwifiex_dbg(adapter, INFO,
			    "Don't connect to AP with WLAN_EID_CHANNEL_SWITCH\n");
		return -1;
	}

	if (mwifiex_is_bss_wapi(priv, bss_desc)) {
		mwifiex_dbg(adapter, INFO,
			    "info: return success for WAPI AP\n");
		return 0;
	}

	if (bss_desc->bss_mode == mode) {
		if (mwifiex_is_bss_no_sec(priv, bss_desc)) {
			/* No security */
			return 0;
		} else if (mwifiex_is_bss_static_wep(priv, bss_desc)) {
			/* Static WEP enabled */
			mwifiex_dbg(adapter, INFO,
				    "info: Disable 11n in WEP mode.\n");
			bss_desc->disable_11n = true;
			return 0;
		} else if (mwifiex_is_bss_wpa(priv, bss_desc)) {
			/* WPA enabled */
			if (((priv->adapter->config_bands & BAND_GN ||
			      priv->adapter->config_bands & BAND_AN) &&
			     bss_desc->bcn_ht_cap) &&
			    !mwifiex_is_wpa_oui_present(bss_desc,
							 CIPHER_SUITE_CCMP)) {

				if (mwifiex_is_wpa_oui_present
						(bss_desc, CIPHER_SUITE_TKIP)) {
					mwifiex_dbg(adapter, INFO,
						    "info: Disable 11n if AES\t"
						    "is not supported by AP\n");
					bss_desc->disable_11n = true;
				} else {
					return -1;
				}
			}
			return 0;
		} else if (mwifiex_is_bss_wpa2(priv, bss_desc)) {
			/* WPA2 enabled */
			if (((priv->adapter->config_bands & BAND_GN ||
			      priv->adapter->config_bands & BAND_AN) &&
			     bss_desc->bcn_ht_cap) &&
			    !mwifiex_is_rsn_oui_present(bss_desc,
							CIPHER_SUITE_CCMP)) {

				if (mwifiex_is_rsn_oui_present
						(bss_desc, CIPHER_SUITE_TKIP)) {
					mwifiex_dbg(adapter, INFO,
						    "info: Disable 11n if AES\t"
						    "is not supported by AP\n");
					bss_desc->disable_11n = true;
				} else {
					return -1;
				}
			}
			return 0;
		} else if (mwifiex_is_bss_adhoc_aes(priv, bss_desc)) {
			/* Ad-hoc AES enabled */
			return 0;
		} else if (mwifiex_is_bss_dynamic_wep(priv, bss_desc)) {
			/* Dynamic WEP enabled */
			return 0;
		}

		/* Security doesn't match */
		dbg_security_flags(ERROR, "failed", priv, bss_desc);
		return -1;
	}

	/* Mode doesn't match */
	return -1;
}

Project: linux
File: scan.c

static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
					  struct cfg80211_bss *bss)
{
	struct mwifiex_bssdescriptor *bss_desc;
	int ret;

	/* Allocate and fill new bss descriptor */
	bss_desc = kzalloc(sizeof(struct mwifiex_bssdescriptor), GFP_KERNEL);
	if (!bss_desc)
		return -ENOMEM;

	ret = mwifiex_fill_new_bss_desc(priv, bss, bss_desc);
	if (ret)
		goto done;

	ret = mwifiex_check_network_compatibility(priv, bss_desc);
	if (ret)
		goto done;

	spin_lock_bh(&priv->curr_bcn_buf_lock);
	/* Make a copy of current BSSID descriptor */
	memcpy(&priv->curr_bss_params.bss_descriptor, bss_desc,
	       sizeof(priv->curr_bss_params.bss_descriptor));

	/* The contents of beacon_ie will be copied to its own buffer
	 * in mwifiex_save_curr_bcn()
	 */
	mwifiex_save_curr_bcn(priv);
	spin_unlock_bh(&priv->curr_bcn_buf_lock);

done:
	/* beacon_ie buffer was allocated in function
	 * mwifiex_fill_new_bss_desc(). Free it now.
	 */
	kfree(bss_desc->beacon_buf);
	kfree(bss_desc);
	return 0;
}

Project: linux
File: scan.c

mwifiex_scan_channel_list(struct mwifiex_private *priv,
			  u32 max_chan_per_scan, u8 filtered_scan,
			  struct mwifiex_scan_cmd_config *scan_cfg_out,
			  struct mwifiex_ie_types_chan_list_param_set
			  *chan_tlv_out,
			  struct mwifiex_chan_scan_param_set *scan_chan_list)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	int ret = 0;
	struct mwifiex_chan_scan_param_set *tmp_chan_list;
	struct mwifiex_chan_scan_param_set *start_chan;
	u32 tlv_idx, rates_size, cmd_no;
	u32 total_scan_time;
	u32 done_early;
	u8 radio_type;

	if (!scan_cfg_out || !chan_tlv_out || !scan_chan_list) {
		mwifiex_dbg(priv->adapter, ERROR,
			    "info: Scan: Null detect: %p, %p, %p\n",
			    scan_cfg_out, chan_tlv_out, scan_chan_list);
		return -1;
	}

	/* Check csa channel expiry before preparing scan list */
	mwifiex_11h_get_csa_closed_channel(priv);

	chan_tlv_out->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);

	/* Set the temp channel struct pointer to the start of the desired
	   list */
	tmp_chan_list = scan_chan_list;

	/* Loop through the desired channel list, sending a new firmware scan
	   commands for each max_chan_per_scan channels (or for 1,6,11
	   individually if configured accordingly) */
	while (tmp_chan_list->chan_number) {

		tlv_idx = 0;
		total_scan_time = 0;
		radio_type = 0;
		chan_tlv_out->header.len = 0;
		start_chan = tmp_chan_list;
		done_early = false;

		/*
		 * Construct the Channel TLV for the scan command.  Continue to
		 * insert channel TLVs until:
		 *   - the tlv_idx hits the maximum configured per scan command
		 *   - the next channel to insert is 0 (end of desired channel
		 *     list)
		 *   - done_early is set (controlling individual scanning of
		 *     1,6,11)
		 */
		while (tlv_idx < max_chan_per_scan &&
		       tmp_chan_list->chan_number && !done_early) {

			if (tmp_chan_list->chan_number == priv->csa_chan) {
				tmp_chan_list++;
				continue;
			}

			radio_type = tmp_chan_list->radio_type;
			mwifiex_dbg(priv->adapter, INFO,
				    "info: Scan: Chan(%3d), Radio(%d),\t"
				    "Mode(%d, %d), Dur(%d)\n",
				    tmp_chan_list->chan_number,
				    tmp_chan_list->radio_type,
				    tmp_chan_list->chan_scan_mode_bitmap
				    & MWIFIEX_PASSIVE_SCAN,
				    (tmp_chan_list->chan_scan_mode_bitmap
				    & MWIFIEX_DISABLE_CHAN_FILT) >> 1,
				    le16_to_cpu(tmp_chan_list->max_scan_time));

			/* Copy the current channel TLV to the command being
			   prepared */
			memcpy(chan_tlv_out->chan_scan_param + tlv_idx,
			       tmp_chan_list,
			       sizeof(chan_tlv_out->chan_scan_param));

			/* Increment the TLV header length by the size
			   appended */
			le16_unaligned_add_cpu(&chan_tlv_out->header.len,
					       sizeof(
						chan_tlv_out->chan_scan_param));

			/*
			 * The tlv buffer length is set to the number of bytes
			 * of the between the channel tlv pointer and the start
			 * of the tlv buffer.  This compensates for any TLVs
			 * that were appended before the channel list.
			 */
			scan_cfg_out->tlv_buf_len = (u32) ((u8 *) chan_tlv_out -
							scan_cfg_out->tlv_buf);

			/* Add the size of the channel tlv header and the data
			   length */
			scan_cfg_out->tlv_buf_len +=
				(sizeof(chan_tlv_out->header)
				 + le16_to_cpu(chan_tlv_out->header.len));

			/* Increment the index to the channel tlv we are
			   constructing */
			tlv_idx++;

			/* Count the total scan time per command */
			total_scan_time +=
				le16_to_cpu(tmp_chan_list->max_scan_time);

			done_early = false;

			/* Stop the loop if the *current* channel is in the
			   1,6,11 set and we are not filtering on a BSSID
			   or SSID. */
			if (!filtered_scan &&
			    (tmp_chan_list->chan_number == 1 ||
			     tmp_chan_list->chan_number == 6 ||
			     tmp_chan_list->chan_number == 11))
				done_early = true;

			/* Increment the tmp pointer to the next channel to
			   be scanned */
			tmp_chan_list++;

			/* Stop the loop if the *next* channel is in the 1,6,11
			   set.  This will cause it to be the only channel
			   scanned on the next interation */
			if (!filtered_scan &&
			    (tmp_chan_list->chan_number == 1 ||
			     tmp_chan_list->chan_number == 6 ||
			     tmp_chan_list->chan_number == 11))
				done_early = true;
		}

		/* The total scan time should be less than scan command timeout
		   value */
		if (total_scan_time > MWIFIEX_MAX_TOTAL_SCAN_TIME) {
			mwifiex_dbg(priv->adapter, ERROR,
				    "total scan time %dms\t"
				    "is over limit (%dms), scan skipped\n",
				    total_scan_time,
				    MWIFIEX_MAX_TOTAL_SCAN_TIME);
			ret = -1;
			break;
		}

		rates_size = mwifiex_append_rate_tlv(priv, scan_cfg_out,
						     radio_type);

		priv->adapter->scan_channels = start_chan;

		/* Send the scan command to the firmware with the specified
		   cfg */
		if (priv->adapter->ext_scan)
			cmd_no = HostCmd_CMD_802_11_SCAN_EXT;
		else
			cmd_no = HostCmd_CMD_802_11_SCAN;

		ret = mwifiex_send_cmd(priv, cmd_no, HostCmd_ACT_GEN_SET,
				       0, scan_cfg_out, false);

		/* rate IE is updated per scan command but same starting
		 * pointer is used each time so that rate IE from earlier
		 * scan_cfg_out->buf is overwritten with new one.
		 */
		scan_cfg_out->tlv_buf_len -=
			    sizeof(struct mwifiex_ie_types_header) + rates_size;

		if (ret) {
			mwifiex_cancel_pending_scan_cmd(adapter);
			break;
		}
	}

	if (ret)
		return -1;

	return 0;
}

Project: linux
File: scan.c

mwifiex_save_curr_bcn(struct mwifiex_private *priv)
{
	struct mwifiex_bssdescriptor *curr_bss =
		&priv->curr_bss_params.bss_descriptor;

	if (!curr_bss->beacon_buf_size)
		return;

	/* allocate beacon buffer at 1st time; or if it's size has changed */
	if (!priv->curr_bcn_buf ||
	    priv->curr_bcn_size != curr_bss->beacon_buf_size) {
		priv->curr_bcn_size = curr_bss->beacon_buf_size;

		kfree(priv->curr_bcn_buf);
		priv->curr_bcn_buf = kmalloc(curr_bss->beacon_buf_size,
					     GFP_ATOMIC);
		if (!priv->curr_bcn_buf)
			return;
	}

	memcpy(priv->curr_bcn_buf, curr_bss->beacon_buf,
	       curr_bss->beacon_buf_size);
	mwifiex_dbg(priv->adapter, INFO,
		    "info: current beacon saved %d\n",
		    priv->curr_bcn_size);

	curr_bss->beacon_buf = priv->curr_bcn_buf;

	/* adjust the pointers in the current BSS descriptor */
	if (curr_bss->bcn_wpa_ie)
		curr_bss->bcn_wpa_ie =
			(struct ieee_types_vendor_specific *)
			(curr_bss->beacon_buf +
			 curr_bss->wpa_offset);

	if (curr_bss->bcn_rsn_ie)
		curr_bss->bcn_rsn_ie = (struct ieee_types_generic *)
			(curr_bss->beacon_buf +
			 curr_bss->rsn_offset);

	if (curr_bss->bcn_ht_cap)
		curr_bss->bcn_ht_cap = (struct ieee80211_ht_cap *)
			(curr_bss->beacon_buf +
			 curr_bss->ht_cap_offset);

	if (curr_bss->bcn_ht_oper)
		curr_bss->bcn_ht_oper = (struct ieee80211_ht_operation *)
			(curr_bss->beacon_buf +
			 curr_bss->ht_info_offset);

	if (curr_bss->bcn_vht_cap)
		curr_bss->bcn_vht_cap = (void *)(curr_bss->beacon_buf +
						 curr_bss->vht_cap_offset);

	if (curr_bss->bcn_vht_oper)
		curr_bss->bcn_vht_oper = (void *)(curr_bss->beacon_buf +
						  curr_bss->vht_info_offset);

	if (curr_bss->bcn_bss_co_2040)
		curr_bss->bcn_bss_co_2040 =
			(curr_bss->beacon_buf + curr_bss->bss_co_2040_offset);

	if (curr_bss->bcn_ext_cap)
		curr_bss->bcn_ext_cap = curr_bss->beacon_buf +
			curr_bss->ext_cap_offset;

	if (curr_bss->oper_mode)
		curr_bss->oper_mode = (void *)(curr_bss->beacon_buf +
					       curr_bss->oper_mode_offset);
}