--- /dev/null
+/*
+ * Marvell Wireless LAN device driver: scan ioctl and command handling
+ *
+ * Copyright (C) 2011-2014, Marvell International Ltd.
+ *
+ * This software file (the "File") is distributed by Marvell International
+ * Ltd. under the terms of the GNU General Public License Version 2, June 1991
+ * (the "License"). You may use, redistribute and/or modify this File in
+ * accordance with the terms and conditions of the License, a copy of which
+ * is available by writing to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
+ * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ *
+ * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
+ * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
+ * this warranty disclaimer.
+ */
+
+#include "decl.h"
+#include "ioctl.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "11n.h"
+#include "cfg80211.h"
+
+/* The maximum number of channels the firmware can scan per command */
+#define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN 14
+
+#define MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD 4
+
+/* Memory needed to store a max sized Channel List TLV for a firmware scan */
+#define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \
+ + (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \
+ *sizeof(struct mwifiex_chan_scan_param_set)))
+
+/* Memory needed to store supported rate */
+#define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \
+ + HOSTCMD_SUPPORTED_RATES)
+
+/* Memory needed to store a max number/size WildCard SSID TLV for a firmware
+ scan */
+#define WILDCARD_SSID_TLV_MAX_SIZE \
+ (MWIFIEX_MAX_SSID_LIST_LENGTH * \
+ (sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \
+ + IEEE80211_MAX_SSID_LEN))
+
+/* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */
+#define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \
+ + sizeof(struct mwifiex_ie_types_num_probes) \
+ + sizeof(struct mwifiex_ie_types_htcap) \
+ + CHAN_TLV_MAX_SIZE \
+ + RATE_TLV_MAX_SIZE \
+ + WILDCARD_SSID_TLV_MAX_SIZE)
+
+
+union mwifiex_scan_cmd_config_tlv {
+ /* Scan configuration (variable length) */
+ struct mwifiex_scan_cmd_config config;
+ /* Max allocated block */
+ u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC];
+};
+
+enum cipher_suite {
+ CIPHER_SUITE_TKIP,
+ CIPHER_SUITE_CCMP,
+ CIPHER_SUITE_MAX
+};
+static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = {
+ { 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */
+ { 0x00, 0x50, 0xf2, 0x04 }, /* AES */
+};
+static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = {
+ { 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */
+ { 0x00, 0x0f, 0xac, 0x04 }, /* AES */
+};
+
+/*
+ * This function parses a given IE for a given OUI.
+ *
+ * This is used to parse a WPA/RSN IE to find if it has
+ * a given oui in PTK.
+ */
+static u8
+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;
+}
+
+/*
+ * This function checks if a given OUI is present in a RSN IE.
+ *
+ * The function first checks if a RSN IE is present or not in the
+ * BSS descriptor. It tries to locate the OUI only if such an IE is
+ * present.
+ */
+static u8
+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 (((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)).
+ ieee_hdr.element_id == 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;
+}
+
+/*
+ * This function checks if a given OUI is present in a WPA IE.
+ *
+ * The function first checks if a WPA IE is present or not in the
+ * BSS descriptor. It tries to locate the OUI only if such an IE is
+ * present.
+ */
+static u8
+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 (((bss_desc->bcn_wpa_ie) &&
+ ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id ==
+ WLAN_EID_VENDOR_SPECIFIC))) {
+ iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
+ oui = &mwifiex_wpa_oui[cipher][0];
+ ret = mwifiex_search_oui_in_ie(iebody, oui);
+ if (ret)
+ return ret;
+ }
+ return ret;
+}
+
+/*
+ * This function compares two SSIDs and checks if they match.
+ */
+s32
+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);
+}
+
+/*
+ * This function checks if wapi is enabled in driver and scanned network is
+ * compatible with it.
+ */
+static bool
+mwifiex_is_bss_wapi(struct mwifiex_private *priv,
+ struct mwifiex_bssdescriptor *bss_desc)
+{
+ if (priv->sec_info.wapi_enabled &&
+ (bss_desc->bcn_wapi_ie &&
+ ((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id ==
+ WLAN_EID_BSS_AC_ACCESS_DELAY))) {
+ return true;
+ }
+ return false;
+}
+
+/*
+ * This function checks if driver is configured with no security mode and
+ * scanned network is compatible with it.
+ */
+static bool
+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 && ((!bss_desc->bcn_wpa_ie) ||
+ ((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id !=
+ WLAN_EID_VENDOR_SPECIFIC)) &&
+ ((!bss_desc->bcn_rsn_ie) ||
+ ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id !=
+ WLAN_EID_RSN)) &&
+ !priv->sec_info.encryption_mode && !bss_desc->privacy) {
+ return true;
+ }
+ return false;
+}
+
+/*
+ * This function checks if static WEP is enabled in driver and scanned network
+ * is compatible with it.
+ */
+static bool
+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;
+}
+
+/*
+ * This function checks if wpa is enabled in driver and scanned network is
+ * compatible with it.
+ */
+static bool
+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 && ((bss_desc->bcn_wpa_ie) &&
+ ((*(bss_desc->bcn_wpa_ie)).
+ vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC))
+ /*
+ * Privacy bit may NOT be set in some APs like
+ * LinkSys WRT54G && bss_desc->privacy
+ */
+ ) {
+ dev_dbg(priv->adapter->dev, "info: %s: WPA:"
+ " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
+ "EncMode=%#x privacy=%#x\n", __func__,
+ (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);
+ return true;
+ }
+ return false;
+}
+
+/*
+ * This function checks if wpa2 is enabled in driver and scanned network is
+ * compatible with it.
+ */
+static bool
+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 &&
+ ((bss_desc->bcn_rsn_ie) &&
+ ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id == WLAN_EID_RSN))) {
+ /*
+ * Privacy bit may NOT be set in some APs like
+ * LinkSys WRT54G && bss_desc->privacy
+ */
+ dev_dbg(priv->adapter->dev, "info: %s: WPA2: "
+ " wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s "
+ "EncMode=%#x privacy=%#x\n", __func__,
+ (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);
+ return true;
+ }
+ return false;
+}
+
+/*
+ * This function checks if adhoc AES is enabled in driver and scanned network is
+ * compatible with it.
+ */
+static bool
+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 &&
+ ((!bss_desc->bcn_wpa_ie) ||
+ ((*(bss_desc->bcn_wpa_ie)).
+ vend_hdr.element_id != WLAN_EID_VENDOR_SPECIFIC)) &&
+ ((!bss_desc->bcn_rsn_ie) ||
+ ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
+ !priv->sec_info.encryption_mode && bss_desc->privacy) {
+ return true;
+ }
+ return false;
+}
+
+/*
+ * This function checks if dynamic WEP is enabled in driver and scanned network
+ * is compatible with it.
+ */
+static bool
+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 &&
+ ((!bss_desc->bcn_wpa_ie) ||
+ ((*(bss_desc->bcn_wpa_ie)).
+ vend_hdr.element_id != WLAN_EID_VENDOR_SPECIFIC)) &&
+ ((!bss_desc->bcn_rsn_ie) ||
+ ((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
+ priv->sec_info.encryption_mode && bss_desc->privacy) {
+ dev_dbg(priv->adapter->dev, "info: %s: dynamic "
+ "WEP: wpa_ie=%#x wpa2_ie=%#x "
+ "EncMode=%#x privacy=%#x\n",
+ __func__,
+ (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.encryption_mode,
+ bss_desc->privacy);
+ return true;
+ }
+ return false;
+}
+
+/*
+ * This function checks if a scanned network is compatible with the driver
+ * settings.
+ *
+ * WEP WPA WPA2 ad-hoc encrypt Network
+ * enabled enabled enabled AES mode Privacy WPA WPA2 Compatible
+ * 0 0 0 0 NONE 0 0 0 yes No security
+ * 0 1 0 0 x 1x 1 x yes WPA (disable
+ * HT if no AES)
+ * 0 0 1 0 x 1x x 1 yes WPA2 (disable
+ * HT if no AES)
+ * 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
+ * 1 0 0 0 NONE 1 0 0 yes Static WEP
+ * (disable HT)
+ * 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
+ *
+ * Compatibility is not matched while roaming, except for mode.
+ */
+static s32
+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) {
+ dev_dbg(adapter->dev,
+ "info: return success directly in WPS period\n");
+ return 0;
+ }
+
+ if (bss_desc->chan_sw_ie_present) {
+ dev_err(adapter->dev,
+ "Don't connect to AP with WLAN_EID_CHANNEL_SWITCH\n");
+ return -1;
+ }
+
+ if (mwifiex_is_bss_wapi(priv, bss_desc)) {
+ dev_dbg(adapter->dev, "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 */
+ dev_dbg(adapter->dev, "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)) {
+ dev_dbg(adapter->dev,
+ "info: Disable 11n if AES "
+ "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)) {
+ dev_dbg(adapter->dev,
+ "info: Disable 11n if AES "
+ "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 */
+ dev_dbg(adapter->dev,
+ "info: %s: failed: wpa_ie=%#x wpa2_ie=%#x WEP=%s "
+ "WPA=%s WPA2=%s EncMode=%#x privacy=%#x\n", __func__,
+ (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);
+ return -1;
+ }
+
+ /* Mode doesn't match */
+ return -1;
+}
+
+/*
+ * This function creates a channel list for the driver to scan, based
+ * on region/band information.
+ *
+ * This routine is used for any scan that is not provided with a
+ * specific channel list to scan.
+ */
+static int
+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 ieee80211_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 < IEEE80211_NUM_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)
+ 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;
+ else
+ scan_chan_list[chan_idx].chan_scan_mode_bitmap
+ &= ~MWIFIEX_PASSIVE_SCAN;
+ scan_chan_list[chan_idx].chan_number =
+ (u32) ch->hw_value;
+ if (filtered_scan) {
+ scan_chan_list[chan_idx].max_scan_time =
+ cpu_to_le16(adapter->specific_scan_time);
+ scan_chan_list[chan_idx].chan_scan_mode_bitmap
+ |= MWIFIEX_DISABLE_CHAN_FILT;
+ }
+ chan_idx++;
+ }
+
+ }
+ return chan_idx;
+}
+
+/* This function appends rate TLV to scan config command. */
+static int
+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);
+
+ dev_dbg(priv->adapter->dev, "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;
+}
+
+/*
+ * This function constructs and sends multiple scan config commands to
+ * the firmware.
+ *
+ * Previous routines in the code flow have created a scan command configuration
+ * with any requested TLVs. This function splits the channel TLV into maximum
+ * channels supported per scan lists and sends the portion of the channel TLV,
+ * along with the other TLVs, to the firmware.
+ */
+static int
+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;
+ struct cmd_ctrl_node *cmd_node, *tmp_node;
+ unsigned long flags;
+ 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) {
+ dev_dbg(priv->adapter->dev,
+ "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;
+ dev_dbg(priv->adapter->dev,
+ "info: Scan: Chan(%3d), Radio(%d),"
+ " 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_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) {
+ dev_err(priv->adapter->dev, "total scan time %dms"
+ " 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) {
+ spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
+ list_for_each_entry_safe(cmd_node, tmp_node,
+ &adapter->scan_pending_q,
+ list) {
+ list_del(&cmd_node->list);
+ cmd_node->wait_q_enabled = false;
+ mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
+ }
+ spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
+ flags);
+ break;
+ }
+ }
+
+ if (ret)
+ return -1;
+
+ return 0;
+}
+
+/*
+ * This function constructs a scan command configuration structure to use
+ * in scan commands.
+ *
+ * Application layer or other functions can invoke network scanning
+ * with a scan configuration supplied in a user scan configuration structure.
+ * This structure is used as the basis of one or many scan command configuration
+ * commands that are sent to the command processing module and eventually to the
+ * firmware.
+ *
+ * This function creates a scan command configuration structure based on the
+ * following user supplied parameters (if present):
+ * - SSID filter
+ * - BSSID filter
+ * - Number of Probes to be sent
+ * - Channel list
+ *
+ * If the SSID or BSSID filter is not present, the filter is disabled/cleared.
+ * If the number of probes is not set, adapter default setting is used.
+ */
+static void
+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_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 chan_num;
+ u32 scan_type;
+ u16 scan_dur;
+ u8 channel;
+ u8 radio_type;
+ int i;
+ u8 ssid_filter;
+ struct mwifiex_ie_types_htcap *ht_cap;
+
+ /* 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) {
+
+ /* 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 =
+ (user_scan_in->bss_mode ? (u8) user_scan_in->
+ bss_mode : (u8) adapter->scan_mode);
+
+ /* Set the number of probes to send, use Adapter setting
+ if unset */
+ num_probes =
+ (user_scan_in->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));
+
+ if (adapter->ext_scan &&
+ !is_zero_ether_addr(scan_cfg_out->specific_bssid)) {
+ 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;
+
+ 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));
+
+ dev_dbg(adapter->dev, "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.
+ */
+ if ((i && ssid_filter) ||
+ !is_zero_ether_addr(scan_cfg_out->specific_bssid))
+ *filtered_scan = true;
+
+ if (user_scan_in->scan_chan_gap) {
+ dev_dbg(adapter->dev, "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);
+ }
+ } 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
+ *max_chan_per_scan = MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD;
+
+ /* If the input config or adapter has the number of Probes set,
+ add tlv */
+ if (num_probes) {
+
+ dev_dbg(adapter->dev, "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) {
+
+ dev_dbg(adapter->dev, "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;
+ else
+ (scan_chan_list +
+ chan_idx)->chan_scan_mode_bitmap
+ &= ~MWIFIEX_PASSIVE_SCAN;
+
+ if (*filtered_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;
+ dev_dbg(adapter->dev,
+ "info: Scan: Scanning current channel only\n");
+ }
+ chan_num = chan_idx;
+ } else {
+ dev_dbg(adapter->dev,
+ "info: Scan: Creating full region channel list\n");
+ chan_num = mwifiex_scan_create_channel_list(priv, user_scan_in,
+ scan_chan_list,
+ *filtered_scan);
+ }
+
+}
+
+/*
+ * This function inspects the scan response buffer for pointers to
+ * expected TLVs.
+ *
+ * TLVs can be included at the end of the scan response BSS information.
+ *
+ * Data in the buffer is parsed pointers to TLVs that can potentially
+ * be passed back in the response.
+ */
+static void
+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;
+
+ dev_dbg(adapter->dev, "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) {
+ dev_err(adapter->dev, "SCAN_RESP: TLV buffer corrupt\n");
+ break;
+ }
+
+ if (req_tlv_type == tlv_type) {
+ switch (tlv_type) {
+ case TLV_TYPE_TSFTIMESTAMP:
+ dev_dbg(adapter->dev, "info: SCAN_RESP: TSF "
+ "timestamp TLV, len = %d\n", tlv_len);
+ *tlv_data = current_tlv;
+ break;
+ case TLV_TYPE_CHANNELBANDLIST:
+ dev_dbg(adapter->dev, "info: SCAN_RESP: channel"
+ " band list TLV, len = %d\n", tlv_len);
+ *tlv_data = current_tlv;
+ break;
+ default:
+ dev_err(adapter->dev,
+ "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 */
+}
+
+/*
+ * This function parses provided beacon buffer and updates
+ * respective fields in bss descriptor structure.
+ */
+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) {
+ dev_err(adapter->dev, "err: InterpretIE: in processing"
+ " IE, bytes left < IE length\n");
+ return -1;
+ }
+ switch (element_id) {
+ case WLAN_EID_SSID:
+ bss_entry->ssid.ssid_len = element_len;
+ memcpy(bss_entry->ssid.ssid, (current_ptr + 2),
+ element_len);
+ dev_dbg(adapter->dev,
+ "info: InterpretIE: ssid: %-32s\n",
+ bss_entry->ssid.ssid);
+ break;
+
+ case WLAN_EID_SUPP_RATES:
+ 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:
+ 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:
+ 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:
+ 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:
+ 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:
+ bss_entry->erp_flags = *(current_ptr + 2);
+ break;
+
+ case WLAN_EID_PWR_CONSTRAINT:
+ 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;
+ 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;
+
+ 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 += element_len + 2;
+
+ /* Need to account for IE ID and IE Len */
+ bytes_left -= (element_len + 2);
+
+ } /* while (bytes_left > 2) */
+ return ret;
+}
+
+/*
+ * This function converts radio type scan parameter to a band configuration
+ * to be used in join command.
+ */
+static u8
+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;
+ }
+}
+
+/*
+ * This is an internal function used to start a scan based on an input
+ * configuration.
+ *
+ * This uses the input user scan configuration information when provided in
+ * order to send the appropriate scan commands to firmware to populate or
+ * update the internal driver scan table.
+ */
+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;
+ unsigned long flags;
+
+ if (adapter->scan_processing) {
+ dev_err(adapter->dev, "cmd: Scan already in process...\n");
+ return -EBUSY;
+ }
+
+ if (priv->scan_block) {
+ dev_err(adapter->dev,
+ "cmd: Scan is blocked during association...\n");
+ return -EBUSY;
+ }
+
+ if (adapter->surprise_removed || adapter->is_cmd_timedout) {
+ dev_err(adapter->dev,
+ "Ignore scan. Card removed or firmware in bad state\n");
+ return -EFAULT;
+ }
+
+ spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
+ adapter->scan_processing = true;
+ spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
+
+ 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_irqsave(&adapter->scan_pending_q_lock, flags);
+ 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_irqrestore(&adapter->scan_pending_q_lock,
+ flags);
+ mwifiex_insert_cmd_to_pending_q(adapter, cmd_node,
+ true);
+ queue_work(adapter->workqueue, &adapter->main_work);
+
+ /* Perform internal scan synchronously */
+ if (!priv->scan_request) {
+ dev_dbg(adapter->dev, "wait internal scan\n");
+ mwifiex_wait_queue_complete(adapter, cmd_node);
+ }
+ } else {
+ spin_unlock_irqrestore(&adapter->scan_pending_q_lock,
+ flags);
+ }
+ }
+
+ kfree(scan_cfg_out);
+ kfree(scan_chan_list);
+done:
+ if (ret) {
+ spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
+ adapter->scan_processing = false;
+ spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
+ }
+ return ret;
+}
+
+/*
+ * This function prepares a scan command to be sent to the firmware.
+ *
+ * This uses the scan command configuration sent to the command processing
+ * module in command preparation stage to configure a scan command structure
+ * to send to firmware.
+ *
+ * The fixed fields specifying the BSS type and BSSID filters as well as a
+ * variable number/length of TLVs are sent in the command to firmware.
+ *
+ * Preparation also includes -
+ * - Setting command ID, and proper size
+ * - Ensuring correct endian-ness
+ */
+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;
+}
+
+/*
+ * This function checks compatibility of requested network with current
+ * driver settings.
+ */
+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)
+ dev_err(priv->adapter->dev,
+ "Incompatible network settings\n");
+ break;
+ default:
+ ret = 0;
+ }
+ }
+
+ return ret;
+}
+
+static int mwifiex_update_curr_bss_params(struct mwifiex_private *priv,
+ struct cfg80211_bss *bss)
+{
+ struct mwifiex_bssdescriptor *bss_desc;
+ int ret;
+ unsigned long flags;
+
+ /* 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_irqsave(&priv->curr_bcn_buf_lock, flags);
+ /* 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_irqrestore(&priv->curr_bcn_buf_lock, flags);
+
+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;
+}
+
+static int
+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 = le16_to_cpu(*(__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)) {
+ dev_err(adapter->dev, "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);
+ dev_dbg(adapter->dev, "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);
+ dev_dbg(adapter->dev, "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;
+ dev_dbg(adapter->dev, "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)) {
+ dev_err(adapter->dev,
+ "%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) {
+ dev_dbg(adapter->dev,
+ "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);
+ 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);
+ cfg80211_put_bss(priv->wdev.wiphy, bss);
+ }
+ } else {
+ dev_dbg(adapter->dev, "missing BSS channel IE\n");
+ }
+
+ return 0;
+}
+
+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) {
+ dev_dbg(adapter->dev, "complete internal scan\n");
+ mwifiex_complete_cmd(adapter, adapter->curr_cmd);
+ }
+ }
+}
+
+static void mwifiex_check_next_scan_command(struct mwifiex_private *priv)
+{
+ struct mwifiex_adapter *adapter = priv->adapter;
+ struct cmd_ctrl_node *cmd_node, *tmp_node;
+ unsigned long flags;
+
+ spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
+ if (list_empty(&adapter->scan_pending_q)) {
+ spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
+ spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
+ adapter->scan_processing = false;
+ spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
+
+ if (!adapter->ext_scan)
+ mwifiex_complete_scan(priv);
+
+ if (priv->scan_request) {
+ dev_dbg(adapter->dev, "info: notifying scan done\n");
+ cfg80211_scan_done(priv->scan_request, 0);
+ priv->scan_request = NULL;
+ } else {
+ priv->scan_aborting = false;
+ dev_dbg(adapter->dev, "info: scan already aborted\n");
+ }
+ } else if ((priv->scan_aborting && !priv->scan_request) ||
+ priv->scan_block) {
+ list_for_each_entry_safe(cmd_node, tmp_node,
+ &adapter->scan_pending_q, list) {
+ list_del(&cmd_node->list);
+ mwifiex_insert_cmd_to_free_q(adapter, cmd_node);
+ }
+ spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
+
+ spin_lock_irqsave(&adapter->mwifiex_cmd_lock, flags);
+ adapter->scan_processing = false;
+ spin_unlock_irqrestore(&adapter->mwifiex_cmd_lock, flags);
+
+ if (priv->scan_request) {
+ dev_dbg(adapter->dev, "info: aborting scan\n");
+ cfg80211_scan_done(priv->scan_request, 1);
+ priv->scan_request = NULL;
+ } else {
+ priv->scan_aborting = false;
+ dev_dbg(adapter->dev, "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_irqrestore(&adapter->scan_pending_q_lock, flags);
+ mwifiex_insert_cmd_to_pending_q(adapter, cmd_node, true);
+ }
+
+ return;
+}
+
+/*
+ * This function handles the command response of scan.
+ *
+ * The response buffer for the scan command has the following
+ * memory layout:
+ *
+ * .-------------------------------------------------------------.
+ * | Header (4 * sizeof(t_u16)): Standard command response hdr |
+ * .-------------------------------------------------------------.
+ * | BufSize (t_u16) : sizeof the BSS Description data |
+ * .-------------------------------------------------------------.
+ * | NumOfSet (t_u8) : Number of BSS Descs returned |
+ * .-------------------------------------------------------------.
+ * | BSSDescription data (variable, size given in BufSize) |
+ * .-------------------------------------------------------------.
+ * | TLV data (variable, size calculated using Header->Size, |
+ * | BufSize and sizeof the fixed fields above) |
+ * .-------------------------------------------------------------.
+ */
+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;
+
+ 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) {
+ dev_err(adapter->dev, "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);
+ dev_dbg(adapter->dev, "info: SCAN_RESP: bss_descript_size %d\n",
+ bytes_left);
+
+ scan_resp_size = le16_to_cpu(resp->size);
+
+ dev_dbg(adapter->dev,
+ "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);
+
+ 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;
+ }
+
+ 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;
+}
+
+/*
+ * This function prepares an extended scan command to be sent to the firmware
+ *
+ * This uses the scan command configuration sent to the command processing
+ * module in command preparation stage to configure a extended scan command
+ * structure to send to firmware.
+ */
+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;
+}
+
+static void
+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++) {
+ 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);
+ dev_dbg(adapter->dev,
+ "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++;
+ }
+}
+
+/* This function handles the command response of extended scan */
+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;
+ unsigned long cmd_flags, scan_flags;
+ bool complete_scan = false;
+
+ dev_dbg(priv->adapter->dev, "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)) {
+ dev_err(adapter->dev,
+ "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_irqsave(&adapter->cmd_pending_q_lock, cmd_flags);
+ spin_lock_irqsave(&adapter->scan_pending_q_lock, scan_flags);
+ 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) {
+ dev_dbg(priv->adapter->dev,
+ "Scan pending in command pending list");
+ complete_scan = false;
+ break;
+ }
+ }
+ }
+ spin_unlock_irqrestore(&adapter->scan_pending_q_lock, scan_flags);
+ spin_unlock_irqrestore(&adapter->cmd_pending_q_lock, cmd_flags);
+
+ if (complete_scan)
+ mwifiex_complete_scan(priv);
+
+ return 0;
+}
+
+/* This function This function handles the event extended scan report. It
+ * parses extended scan results and informs to cfg80211 stack.
+ */
+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) {
+ dev_err(adapter->dev,
+ "EXT_SCAN: Invalid number of AP returned (%d)!!\n",
+ num_of_set);
+ ret = -1;
+ goto check_next_scan;
+ }
+
+ bytes_left = scan_resp_size;
+ dev_dbg(adapter->dev,
+ "EXT_SCAN: size %d, returned %d APs...",
+ scan_resp_size, num_of_set);
+
+ 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) {
+ dev_err(adapter->dev, "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) {
+ dev_err(adapter->dev,
+ "EXT_SCAN: Error in processing TLV, 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 */
+ dev_dbg(adapter->dev,
+ "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;
+}
+
+/*
+ * This function prepares command for background scan query.
+ *
+ * Preparation includes -
+ * - Setting command ID and proper size
+ * - Setting background scan flush parameter
+ * - Ensuring correct endian-ness
+ */
+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;
+}
+
+/*
+ * This function inserts scan command node to the scan pending queue.
+ */
+void
+mwifiex_queue_scan_cmd(struct mwifiex_private *priv,
+ struct cmd_ctrl_node *cmd_node)
+{
+ struct mwifiex_adapter *adapter = priv->adapter;
+ unsigned long flags;
+
+ cmd_node->wait_q_enabled = true;
+ cmd_node->condition = &adapter->scan_wait_q_woken;
+ spin_lock_irqsave(&adapter->scan_pending_q_lock, flags);
+ list_add_tail(&cmd_node->list, &adapter->scan_pending_q);
+ spin_unlock_irqrestore(&adapter->scan_pending_q_lock, flags);
+}
+
+/*
+ * This function sends a scan command for all available channels to the
+ * firmware, filtered on a specific SSID.
+ */
+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) {
+ dev_err(adapter->dev, "cmd: Scan already in process...\n");
+ return -EBUSY;
+ }
+
+ if (priv->scan_block) {
+ dev_err(adapter->dev,
+ "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;
+}
+
+/*
+ * Sends IOCTL request to start a scan.
+ *
+ * This function allocates the IOCTL request buffer, fills it
+ * with requisite parameters and calls the IOCTL handler.
+ *
+ * Scan command can be issued for both normal scan and specific SSID
+ * scan, depending upon whether an SSID is provided or not.
+ */
+int mwifiex_request_scan(struct mwifiex_private *priv,
+ struct cfg80211_ssid *req_ssid)
+{
+ int ret;
+
+ if (down_interruptible(&priv->async_sem)) {
+ dev_err(priv->adapter->dev, "%s: acquire semaphore\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);
+
+ up(&priv->async_sem);
+
+ return ret;
+}
+
+/*
+ * This function appends the vendor specific IE TLV to a buffer.
+ */
+int
+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);
+ 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;
+}
+
+/*
+ * This function saves a beacon buffer of the current BSS descriptor.
+ *
+ * The current beacon buffer is saved so that it can be restored in the
+ * following cases that makes the beacon buffer not to contain the current
+ * ssid's beacon buffer.
+ * - The current ssid was not found somehow in the last scan.
+ * - The current ssid was the last entry of the scan table and overloaded.
+ */
+void
+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);
+ dev_dbg(priv->adapter->dev, "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);
+}
+
+/*
+ * This function frees the current BSS descriptor beacon buffer.
+ */
+void
+mwifiex_free_curr_bcn(struct mwifiex_private *priv)
+{
+ kfree(priv->curr_bcn_buf);
+ priv->curr_bcn_buf = NULL;
+}
Code Review / kvmfornfv.git / blobdiff