diff options
Diffstat (limited to 'drivers/net/wireless/marvell/mwifiex/scan.c')
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/scan.c | 2639 |
1 files changed, 2639 insertions, 0 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/scan.c b/drivers/net/wireless/marvell/mwifiex/scan.c new file mode 100644 index 000000000000..c20017ced566 --- /dev/null +++ b/drivers/net/wireless/marvell/mwifiex/scan.c @@ -0,0 +1,2639 @@ +/* + * 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 + */ + ) { + mwifiex_dbg(priv->adapter, INFO, + "info: %s: WPA:\t" + "wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s\t" + "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 + */ + mwifiex_dbg(priv->adapter, INFO, + "info: %s: WPA2:\t" + "wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s\t" + "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) { + mwifiex_dbg(priv->adapter, INFO, + "info: %s: dynamic\t" + "WEP: wpa_ie=%#x wpa2_ie=%#x\t" + "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) { + 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 */ + mwifiex_dbg(adapter, ERROR, + "info: %s: failed: wpa_ie=%#x wpa2_ie=%#x WEP=%s\t" + "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 | + 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; + 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); + + 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; +} + +/* + * 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) { + 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_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) { + 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; + struct mwifiex_ie_types_bss_mode *bss_mode; + + /* 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; + + 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. + */ + if ((i && ssid_filter) || + !is_zero_ether_addr(scan_cfg_out->specific_bssid)) + *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); + } + } 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 (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; + + 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; + mwifiex_dbg(adapter, INFO, + "info: Scan: Scanning current channel only\n"); + } + chan_num = chan_idx; + } else { + mwifiex_dbg(adapter, INFO, + "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; + + 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 */ +} + +/* + * 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) { + mwifiex_dbg(adapter, ERROR, + "err: InterpretIE: in processing\t" + "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); + mwifiex_dbg(adapter, INFO, + "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) { + 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 (adapter->surprise_removed || adapter->is_cmd_timedout) { + mwifiex_dbg(adapter, ERROR, + "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) { + mwifiex_dbg(adapter, INFO, + "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) + mwifiex_dbg(priv->adapter, ERROR, + "Incompatible network settings\n"); + break; + default: + ret = 0; + } + } + + return ret; +} + +/* This function checks if SSID string contains all zeroes or length is zero */ +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; +} + +/* This function checks if any hidden SSID found in passive scan channels + * and save those channels for specific SSID active scan + */ +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: + kfree(bss_desc); + return 0; +} + +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)) { + 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); + cfg80211_put_bss(priv->wdev.wiphy, 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); + } + } + } else { + mwifiex_dbg(adapter, WARN, "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) { + mwifiex_dbg(adapter, INFO, + "complete internal scan\n"); + mwifiex_complete_cmd(adapter, adapter->curr_cmd); + } + } +} + +/* This function checks if any hidden SSID found in passive scan channels + * and do specific SSID active scan for those channels + */ +static int +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) { + 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; + + memset(user_scan_cfg, 0, sizeof(*user_scan_cfg)); + + 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; + 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; +} +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); + + mwifiex_active_scan_req_for_passive_chan(priv); + + if (!adapter->ext_scan) + mwifiex_complete_scan(priv); + + if (priv->scan_request) { + mwifiex_dbg(adapter, INFO, + "info: notifying scan done\n"); + cfg80211_scan_done(priv->scan_request, 0); + priv->scan_request = NULL; + } 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) { + 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 (!adapter->active_scan_triggered) { + if (priv->scan_request) { + mwifiex_dbg(adapter, INFO, + "info: aborting scan\n"); + cfg80211_scan_done(priv->scan_request, 1); + priv->scan_request = NULL; + } 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_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) { + 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); + + 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); + 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++; + } +} + +/* 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; + + 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_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) { + mwifiex_dbg(adapter, INFO, + "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) { + 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; +} + +/* + * 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) { + 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; +} + +/* + * 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)) { + 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); + + 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); + 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); +} + +/* + * 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; +} |