mirror of https://gitee.com/openkylin/linux.git
2640 lines
76 KiB
C
2640 lines
76 KiB
C
/*
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* Marvell Wireless LAN device driver: scan ioctl and command handling
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*
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* Copyright (C) 2011-2014, Marvell International Ltd.
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*
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* This software file (the "File") is distributed by Marvell International
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* Ltd. under the terms of the GNU General Public License Version 2, June 1991
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* (the "License"). You may use, redistribute and/or modify this File in
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* accordance with the terms and conditions of the License, a copy of which
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* is available by writing to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
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* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
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*
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* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
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* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
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* this warranty disclaimer.
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*/
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#include "decl.h"
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#include "ioctl.h"
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#include "util.h"
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#include "fw.h"
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#include "main.h"
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#include "11n.h"
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#include "cfg80211.h"
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/* The maximum number of channels the firmware can scan per command */
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#define MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN 14
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#define MWIFIEX_DEF_CHANNELS_PER_SCAN_CMD 4
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/* Memory needed to store a max sized Channel List TLV for a firmware scan */
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#define CHAN_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_header) \
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+ (MWIFIEX_MAX_CHANNELS_PER_SPECIFIC_SCAN \
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*sizeof(struct mwifiex_chan_scan_param_set)))
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/* Memory needed to store supported rate */
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#define RATE_TLV_MAX_SIZE (sizeof(struct mwifiex_ie_types_rates_param_set) \
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+ HOSTCMD_SUPPORTED_RATES)
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/* Memory needed to store a max number/size WildCard SSID TLV for a firmware
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scan */
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#define WILDCARD_SSID_TLV_MAX_SIZE \
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(MWIFIEX_MAX_SSID_LIST_LENGTH * \
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(sizeof(struct mwifiex_ie_types_wildcard_ssid_params) \
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+ IEEE80211_MAX_SSID_LEN))
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/* Maximum memory needed for a mwifiex_scan_cmd_config with all TLVs at max */
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#define MAX_SCAN_CFG_ALLOC (sizeof(struct mwifiex_scan_cmd_config) \
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+ sizeof(struct mwifiex_ie_types_num_probes) \
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+ sizeof(struct mwifiex_ie_types_htcap) \
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+ CHAN_TLV_MAX_SIZE \
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+ RATE_TLV_MAX_SIZE \
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+ WILDCARD_SSID_TLV_MAX_SIZE)
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union mwifiex_scan_cmd_config_tlv {
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/* Scan configuration (variable length) */
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struct mwifiex_scan_cmd_config config;
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/* Max allocated block */
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u8 config_alloc_buf[MAX_SCAN_CFG_ALLOC];
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};
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enum cipher_suite {
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CIPHER_SUITE_TKIP,
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CIPHER_SUITE_CCMP,
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CIPHER_SUITE_MAX
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};
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static u8 mwifiex_wpa_oui[CIPHER_SUITE_MAX][4] = {
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{ 0x00, 0x50, 0xf2, 0x02 }, /* TKIP */
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{ 0x00, 0x50, 0xf2, 0x04 }, /* AES */
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};
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static u8 mwifiex_rsn_oui[CIPHER_SUITE_MAX][4] = {
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{ 0x00, 0x0f, 0xac, 0x02 }, /* TKIP */
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{ 0x00, 0x0f, 0xac, 0x04 }, /* AES */
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};
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/*
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* This function parses a given IE for a given OUI.
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*
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* This is used to parse a WPA/RSN IE to find if it has
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* a given oui in PTK.
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*/
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static u8
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mwifiex_search_oui_in_ie(struct ie_body *iebody, u8 *oui)
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{
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u8 count;
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count = iebody->ptk_cnt[0];
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/* There could be multiple OUIs for PTK hence
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1) Take the length.
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2) Check all the OUIs for AES.
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3) If one of them is AES then pass success. */
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while (count) {
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if (!memcmp(iebody->ptk_body, oui, sizeof(iebody->ptk_body)))
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return MWIFIEX_OUI_PRESENT;
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--count;
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if (count)
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iebody = (struct ie_body *) ((u8 *) iebody +
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sizeof(iebody->ptk_body));
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}
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pr_debug("info: %s: OUI is not found in PTK\n", __func__);
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return MWIFIEX_OUI_NOT_PRESENT;
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}
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/*
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* This function checks if a given OUI is present in a RSN IE.
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*
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* The function first checks if a RSN IE is present or not in the
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* BSS descriptor. It tries to locate the OUI only if such an IE is
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* present.
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*/
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static u8
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mwifiex_is_rsn_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
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{
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u8 *oui;
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struct ie_body *iebody;
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u8 ret = MWIFIEX_OUI_NOT_PRESENT;
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if (((bss_desc->bcn_rsn_ie) && ((*(bss_desc->bcn_rsn_ie)).
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ieee_hdr.element_id == WLAN_EID_RSN))) {
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iebody = (struct ie_body *)
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(((u8 *) bss_desc->bcn_rsn_ie->data) +
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RSN_GTK_OUI_OFFSET);
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oui = &mwifiex_rsn_oui[cipher][0];
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ret = mwifiex_search_oui_in_ie(iebody, oui);
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if (ret)
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return ret;
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}
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return ret;
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}
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/*
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* This function checks if a given OUI is present in a WPA IE.
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*
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* The function first checks if a WPA IE is present or not in the
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* BSS descriptor. It tries to locate the OUI only if such an IE is
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* present.
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*/
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static u8
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mwifiex_is_wpa_oui_present(struct mwifiex_bssdescriptor *bss_desc, u32 cipher)
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{
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u8 *oui;
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struct ie_body *iebody;
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u8 ret = MWIFIEX_OUI_NOT_PRESENT;
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if (((bss_desc->bcn_wpa_ie) &&
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((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id ==
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WLAN_EID_VENDOR_SPECIFIC))) {
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iebody = (struct ie_body *) bss_desc->bcn_wpa_ie->data;
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oui = &mwifiex_wpa_oui[cipher][0];
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ret = mwifiex_search_oui_in_ie(iebody, oui);
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if (ret)
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return ret;
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}
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return ret;
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}
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/*
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* This function compares two SSIDs and checks if they match.
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*/
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s32
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mwifiex_ssid_cmp(struct cfg80211_ssid *ssid1, struct cfg80211_ssid *ssid2)
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{
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if (!ssid1 || !ssid2 || (ssid1->ssid_len != ssid2->ssid_len))
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return -1;
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return memcmp(ssid1->ssid, ssid2->ssid, ssid1->ssid_len);
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}
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/*
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* This function checks if wapi is enabled in driver and scanned network is
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* compatible with it.
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*/
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static bool
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mwifiex_is_bss_wapi(struct mwifiex_private *priv,
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struct mwifiex_bssdescriptor *bss_desc)
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{
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if (priv->sec_info.wapi_enabled &&
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(bss_desc->bcn_wapi_ie &&
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((*(bss_desc->bcn_wapi_ie)).ieee_hdr.element_id ==
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WLAN_EID_BSS_AC_ACCESS_DELAY))) {
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return true;
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}
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return false;
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}
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/*
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* This function checks if driver is configured with no security mode and
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* scanned network is compatible with it.
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*/
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static bool
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mwifiex_is_bss_no_sec(struct mwifiex_private *priv,
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struct mwifiex_bssdescriptor *bss_desc)
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{
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if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
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!priv->sec_info.wpa2_enabled && ((!bss_desc->bcn_wpa_ie) ||
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((*(bss_desc->bcn_wpa_ie)).vend_hdr.element_id !=
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WLAN_EID_VENDOR_SPECIFIC)) &&
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((!bss_desc->bcn_rsn_ie) ||
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((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id !=
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WLAN_EID_RSN)) &&
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!priv->sec_info.encryption_mode && !bss_desc->privacy) {
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return true;
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}
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return false;
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}
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/*
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* This function checks if static WEP is enabled in driver and scanned network
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* is compatible with it.
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*/
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static bool
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mwifiex_is_bss_static_wep(struct mwifiex_private *priv,
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struct mwifiex_bssdescriptor *bss_desc)
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{
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if (priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
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!priv->sec_info.wpa2_enabled && bss_desc->privacy) {
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return true;
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}
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return false;
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}
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/*
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* This function checks if wpa is enabled in driver and scanned network is
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* compatible with it.
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*/
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static bool
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mwifiex_is_bss_wpa(struct mwifiex_private *priv,
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struct mwifiex_bssdescriptor *bss_desc)
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{
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if (!priv->sec_info.wep_enabled && priv->sec_info.wpa_enabled &&
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!priv->sec_info.wpa2_enabled && ((bss_desc->bcn_wpa_ie) &&
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((*(bss_desc->bcn_wpa_ie)).
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vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC))
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/*
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* Privacy bit may NOT be set in some APs like
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* LinkSys WRT54G && bss_desc->privacy
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*/
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) {
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mwifiex_dbg(priv->adapter, INFO,
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"info: %s: WPA:\t"
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"wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s\t"
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"EncMode=%#x privacy=%#x\n", __func__,
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(bss_desc->bcn_wpa_ie) ?
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(*bss_desc->bcn_wpa_ie).
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vend_hdr.element_id : 0,
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(bss_desc->bcn_rsn_ie) ?
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(*bss_desc->bcn_rsn_ie).
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ieee_hdr.element_id : 0,
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(priv->sec_info.wep_enabled) ? "e" : "d",
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(priv->sec_info.wpa_enabled) ? "e" : "d",
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(priv->sec_info.wpa2_enabled) ? "e" : "d",
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priv->sec_info.encryption_mode,
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bss_desc->privacy);
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return true;
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}
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return false;
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}
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/*
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* This function checks if wpa2 is enabled in driver and scanned network is
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* compatible with it.
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*/
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static bool
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mwifiex_is_bss_wpa2(struct mwifiex_private *priv,
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struct mwifiex_bssdescriptor *bss_desc)
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{
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if (!priv->sec_info.wep_enabled &&
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!priv->sec_info.wpa_enabled &&
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priv->sec_info.wpa2_enabled &&
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((bss_desc->bcn_rsn_ie) &&
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((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id == WLAN_EID_RSN))) {
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/*
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* Privacy bit may NOT be set in some APs like
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* LinkSys WRT54G && bss_desc->privacy
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*/
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mwifiex_dbg(priv->adapter, INFO,
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"info: %s: WPA2:\t"
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"wpa_ie=%#x wpa2_ie=%#x WEP=%s WPA=%s WPA2=%s\t"
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"EncMode=%#x privacy=%#x\n", __func__,
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(bss_desc->bcn_wpa_ie) ?
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(*bss_desc->bcn_wpa_ie).
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vend_hdr.element_id : 0,
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(bss_desc->bcn_rsn_ie) ?
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(*bss_desc->bcn_rsn_ie).
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ieee_hdr.element_id : 0,
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(priv->sec_info.wep_enabled) ? "e" : "d",
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(priv->sec_info.wpa_enabled) ? "e" : "d",
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(priv->sec_info.wpa2_enabled) ? "e" : "d",
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priv->sec_info.encryption_mode,
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bss_desc->privacy);
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return true;
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}
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return false;
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}
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/*
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* This function checks if adhoc AES is enabled in driver and scanned network is
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* compatible with it.
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*/
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static bool
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mwifiex_is_bss_adhoc_aes(struct mwifiex_private *priv,
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struct mwifiex_bssdescriptor *bss_desc)
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{
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if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
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!priv->sec_info.wpa2_enabled &&
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((!bss_desc->bcn_wpa_ie) ||
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((*(bss_desc->bcn_wpa_ie)).
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vend_hdr.element_id != WLAN_EID_VENDOR_SPECIFIC)) &&
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((!bss_desc->bcn_rsn_ie) ||
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((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
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!priv->sec_info.encryption_mode && bss_desc->privacy) {
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return true;
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}
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return false;
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}
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/*
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* This function checks if dynamic WEP is enabled in driver and scanned network
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* is compatible with it.
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*/
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static bool
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mwifiex_is_bss_dynamic_wep(struct mwifiex_private *priv,
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struct mwifiex_bssdescriptor *bss_desc)
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{
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if (!priv->sec_info.wep_enabled && !priv->sec_info.wpa_enabled &&
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!priv->sec_info.wpa2_enabled &&
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((!bss_desc->bcn_wpa_ie) ||
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((*(bss_desc->bcn_wpa_ie)).
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vend_hdr.element_id != WLAN_EID_VENDOR_SPECIFIC)) &&
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((!bss_desc->bcn_rsn_ie) ||
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((*(bss_desc->bcn_rsn_ie)).ieee_hdr.element_id != WLAN_EID_RSN)) &&
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priv->sec_info.encryption_mode && bss_desc->privacy) {
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mwifiex_dbg(priv->adapter, INFO,
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"info: %s: dynamic\t"
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"WEP: wpa_ie=%#x wpa2_ie=%#x\t"
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"EncMode=%#x privacy=%#x\n",
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__func__,
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(bss_desc->bcn_wpa_ie) ?
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(*bss_desc->bcn_wpa_ie).
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vend_hdr.element_id : 0,
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(bss_desc->bcn_rsn_ie) ?
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(*bss_desc->bcn_rsn_ie).
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ieee_hdr.element_id : 0,
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priv->sec_info.encryption_mode,
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bss_desc->privacy);
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return true;
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}
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return false;
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}
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/*
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* This function checks if a scanned network is compatible with the driver
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* settings.
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*
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* WEP WPA WPA2 ad-hoc encrypt Network
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* enabled enabled enabled AES mode Privacy WPA WPA2 Compatible
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* 0 0 0 0 NONE 0 0 0 yes No security
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* 0 1 0 0 x 1x 1 x yes WPA (disable
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* HT if no AES)
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* 0 0 1 0 x 1x x 1 yes WPA2 (disable
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* HT if no AES)
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* 0 0 0 1 NONE 1 0 0 yes Ad-hoc AES
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* 1 0 0 0 NONE 1 0 0 yes Static WEP
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* (disable HT)
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* 0 0 0 0 !=NONE 1 0 0 yes Dynamic WEP
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*
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* Compatibility is not matched while roaming, except for mode.
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*/
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static s32
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mwifiex_is_network_compatible(struct mwifiex_private *priv,
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struct mwifiex_bssdescriptor *bss_desc, u32 mode)
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{
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struct mwifiex_adapter *adapter = priv->adapter;
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|
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bss_desc->disable_11n = false;
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|
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/* Don't check for compatibility if roaming */
|
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if (priv->media_connected &&
|
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(priv->bss_mode == NL80211_IFTYPE_STATION) &&
|
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(bss_desc->bss_mode == NL80211_IFTYPE_STATION))
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return 0;
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|
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if (priv->wps.session_enable) {
|
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mwifiex_dbg(adapter, IOCTL,
|
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"info: return success directly in WPS period\n");
|
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return 0;
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}
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|
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if (bss_desc->chan_sw_ie_present) {
|
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mwifiex_dbg(adapter, INFO,
|
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"Don't connect to AP with WLAN_EID_CHANNEL_SWITCH\n");
|
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return -1;
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}
|
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|
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if (mwifiex_is_bss_wapi(priv, bss_desc)) {
|
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mwifiex_dbg(adapter, INFO,
|
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"info: return success for WAPI AP\n");
|
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return 0;
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}
|
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|
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if (bss_desc->bss_mode == mode) {
|
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if (mwifiex_is_bss_no_sec(priv, bss_desc)) {
|
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/* No security */
|
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return 0;
|
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} else if (mwifiex_is_bss_static_wep(priv, bss_desc)) {
|
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/* Static WEP enabled */
|
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mwifiex_dbg(adapter, INFO,
|
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"info: Disable 11n in WEP mode.\n");
|
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bss_desc->disable_11n = true;
|
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return 0;
|
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} else if (mwifiex_is_bss_wpa(priv, bss_desc)) {
|
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/* WPA enabled */
|
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if (((priv->adapter->config_bands & BAND_GN ||
|
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priv->adapter->config_bands & BAND_AN) &&
|
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bss_desc->bcn_ht_cap) &&
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!mwifiex_is_wpa_oui_present(bss_desc,
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CIPHER_SUITE_CCMP)) {
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|
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if (mwifiex_is_wpa_oui_present
|
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(bss_desc, CIPHER_SUITE_TKIP)) {
|
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mwifiex_dbg(adapter, INFO,
|
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"info: Disable 11n if AES\t"
|
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"is not supported by AP\n");
|
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bss_desc->disable_11n = true;
|
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} else {
|
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return -1;
|
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}
|
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}
|
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return 0;
|
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} else if (mwifiex_is_bss_wpa2(priv, bss_desc)) {
|
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/* WPA2 enabled */
|
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if (((priv->adapter->config_bands & BAND_GN ||
|
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priv->adapter->config_bands & BAND_AN) &&
|
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bss_desc->bcn_ht_cap) &&
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!mwifiex_is_rsn_oui_present(bss_desc,
|
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CIPHER_SUITE_CCMP)) {
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|
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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;
|
|
}
|