Quelle  join.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * NXP Wireless LAN device driver: association and ad-hoc start/join
 *
 * Copyright 2011-2020 NXP
 */

#include "decl.h"
#include "ioctl.h"
#include "util.h"
#include "fw.h"
#include "main.h"
#include "wmm.h"
#include "11n.h"
#include "11ac.h"

#define CAPINFO_MASK    (~(BIT(15) | BIT(14) | BIT(12) | BIT(11) | BIT(9)))

/*
 * Append a generic IE as a pass through TLV to a TLV buffer.
 *
 * This function is called from the network join command preparation routine.
 *
 * If the IE buffer has been setup by the application, this routine appends
 * the buffer as a pass through TLV type to the request.
 */
static int
mwifiex_cmd_append_generic_ie(struct mwifiex_private *priv, u8 **buffer)
{
 int ret_len = 0;
 struct mwifiex_ie_types_header ie_header;

 /* Null Checks */
 if (!buffer)
  return 0;
 if (!(*buffer))
  return 0;

 /*
 * If there is a generic ie buffer setup, append it to the return
 *   parameter buffer pointer.
 */
 if (priv->gen_ie_buf_len) {
  mwifiex_dbg(priv->adapter, INFO,
       "info: %s: append generic ie len %d to %p\n",
       __func__, priv->gen_ie_buf_len, *buffer);

  /* Wrap the generic IE buffer with a pass through TLV type */
  ie_header.type = cpu_to_le16(TLV_TYPE_PASSTHROUGH);
  ie_header.len = cpu_to_le16(priv->gen_ie_buf_len);
  memcpy(*buffer, &ie_header, sizeof(ie_header));

  /* Increment the return size and the return buffer pointer
   param */
  *buffer += sizeof(ie_header);
  ret_len += sizeof(ie_header);

  /* Copy the generic IE buffer to the output buffer, advance
   pointer */
  memcpy(*buffer, priv->gen_ie_buf, priv->gen_ie_buf_len);

  /* Increment the return size and the return buffer pointer
   param */
  *buffer += priv->gen_ie_buf_len;
  ret_len += priv->gen_ie_buf_len;

  /* Reset the generic IE buffer */
  priv->gen_ie_buf_len = 0;
 }

 /* return the length appended to the buffer */
 return ret_len;
}

/*
 * Append TSF tracking info from the scan table for the target AP.
 *
 * This function is called from the network join command preparation routine.
 *
 * The TSF table TSF sent to the firmware contains two TSF values:
 *      - The TSF of the target AP from its previous beacon/probe response
 *      - The TSF timestamp of our local MAC at the time we observed the
 *        beacon/probe response.
 *
 * The firmware uses the timestamp values to set an initial TSF value
 * in the MAC for the new association after a reassociation attempt.
 */
static int
mwifiex_cmd_append_tsf_tlv(struct mwifiex_private *priv, u8 **buffer,
      struct mwifiex_bssdescriptor *bss_desc)
{
 struct mwifiex_ie_types_tsf_timestamp tsf_tlv;
 __le64 tsf_val;

 /* Null Checks */
 if (buffer == NULL)
  return 0;
 if (*buffer == NULL)
  return 0;

 memset(&tsf_tlv, 0x00, sizeof(struct mwifiex_ie_types_tsf_timestamp));

 tsf_tlv.header.type = cpu_to_le16(TLV_TYPE_TSFTIMESTAMP);
 tsf_tlv.header.len = cpu_to_le16(2 * sizeof(tsf_val));

 memcpy(*buffer, &tsf_tlv, sizeof(tsf_tlv.header));
 *buffer += sizeof(tsf_tlv.header);

 /* TSF at the time when beacon/probe_response was received */
 tsf_val = cpu_to_le64(bss_desc->fw_tsf);
 memcpy(*buffer, &tsf_val, sizeof(tsf_val));
 *buffer += sizeof(tsf_val);

 tsf_val = cpu_to_le64(bss_desc->timestamp);

 mwifiex_dbg(priv->adapter, INFO,
      "info: %s: TSF offset calc: %016llx - %016llx\n",
      __func__, bss_desc->timestamp, bss_desc->fw_tsf);

 memcpy(*buffer, &tsf_val, sizeof(tsf_val));
 *buffer += sizeof(tsf_val);

 return sizeof(tsf_tlv.header) + (2 * sizeof(tsf_val));
}

/*
 * This function finds out the common rates between rate1 and rate2.
 *
 * It will fill common rates in rate1 as output if found.
 *
 * NOTE: Setting the MSB of the basic rates needs to be taken
 * care of, either before or after calling this function.
 */
static int mwifiex_get_common_rates(struct mwifiex_private *priv, u8 *rate1,
        u32 rate1_size, u8 *rate2, u32 rate2_size)
{
 int ret;
 u8 *ptr = rate1, *tmp;
 u32 i, j;

 tmp = kmemdup(rate1, rate1_size, GFP_KERNEL);
 if (!tmp) {
  mwifiex_dbg(priv->adapter, ERROR, "failed to alloc tmp buf\n");
  return -ENOMEM;
 }

 memset(rate1, 0, rate1_size);

 for (i = 0; i < rate2_size && rate2[i]; i++) {
  for (j = 0; j < rate1_size && tmp[j]; j++) {
   /* Check common rate, excluding the bit for
   basic rate */
   if ((rate2[i] & 0x7F) == (tmp[j] & 0x7F)) {
    *rate1++ = tmp[j];
    break;
   }
  }
 }

 mwifiex_dbg(priv->adapter, INFO, "info: Tx data rate set to %#x\n",
      priv->data_rate);

 if (!priv->is_data_rate_auto) {
  while (*ptr) {
   if ((*ptr & 0x7f) == priv->data_rate) {
    ret = 0;
    goto done;
   }
   ptr++;
  }
  mwifiex_dbg(priv->adapter, ERROR,
       "previously set fixed data rate %#x\t"
       "is not compatible with the network\n",
       priv->data_rate);

  ret = -1;
  goto done;
 }

 ret = 0;
done:
 kfree(tmp);
 return ret;
}

/*
 * This function creates the intersection of the rates supported by a
 * target BSS and our adapter settings for use in an assoc/join command.
 */
static int
mwifiex_setup_rates_from_bssdesc(struct mwifiex_private *priv,
     struct mwifiex_bssdescriptor *bss_desc,
     u8 *out_rates, u32 *out_rates_size)
{
 u8 card_rates[MWIFIEX_SUPPORTED_RATES];
 u32 card_rates_size;

 /* Copy AP supported rates */
 memcpy(out_rates, bss_desc->supported_rates, MWIFIEX_SUPPORTED_RATES);
 /* Get the STA supported rates */
 card_rates_size = mwifiex_get_active_data_rates(priv, card_rates);
 /* Get the common rates between AP and STA supported rates */
 if (mwifiex_get_common_rates(priv, out_rates, MWIFIEX_SUPPORTED_RATES,
         card_rates, card_rates_size)) {
  *out_rates_size = 0;
  mwifiex_dbg(priv->adapter, ERROR,
       "%s: cannot get common rates\n",
       __func__);
  return -1;
 }

 *out_rates_size =
  min_t(size_t, strlen(out_rates), MWIFIEX_SUPPORTED_RATES);

 return 0;
}

/*
 * This function appends a WPS IE. It is called from the network join command
 * preparation routine.
 *
 * If the IE buffer has been setup by the application, this routine appends
 * the buffer as a WPS TLV type to the request.
 */
static int
mwifiex_cmd_append_wps_ie(struct mwifiex_private *priv, u8 **buffer)
{
 int retLen = 0;
 struct mwifiex_ie_types_header ie_header;

 if (!buffer || !*buffer)
  return 0;

 /*
 * If there is a wps ie buffer setup, append it to the return
 * parameter buffer pointer.
 */
 if (priv->wps_ie_len) {
  mwifiex_dbg(priv->adapter, CMD,
       "cmd: append wps ie %d to %p\n",
       priv->wps_ie_len, *buffer);

  /* Wrap the generic IE buffer with a pass through TLV type */
  ie_header.type = cpu_to_le16(TLV_TYPE_PASSTHROUGH);
  ie_header.len = cpu_to_le16(priv->wps_ie_len);
  memcpy(*buffer, &ie_header, sizeof(ie_header));
  *buffer += sizeof(ie_header);
  retLen += sizeof(ie_header);

  memcpy(*buffer, priv->wps_ie, priv->wps_ie_len);
  *buffer += priv->wps_ie_len;
  retLen += priv->wps_ie_len;

 }

 kfree(priv->wps_ie);
 priv->wps_ie_len = 0;
 return retLen;
}

/*
 * This function appends a WAPI IE.
 *
 * This function is called from the network join command preparation routine.
 *
 * If the IE buffer has been setup by the application, this routine appends
 * the buffer as a WAPI TLV type to the request.
 */
static int
mwifiex_cmd_append_wapi_ie(struct mwifiex_private *priv, u8 **buffer)
{
 int retLen = 0;
 struct mwifiex_ie_types_header ie_header;

 /* Null Checks */
 if (buffer == NULL)
  return 0;
 if (*buffer == NULL)
  return 0;

 /*
 * If there is a wapi ie buffer setup, append it to the return
 *   parameter buffer pointer.
 */
 if (priv->wapi_ie_len) {
  mwifiex_dbg(priv->adapter, CMD,
       "cmd: append wapi ie %d to %p\n",
       priv->wapi_ie_len, *buffer);

  /* Wrap the generic IE buffer with a pass through TLV type */
  ie_header.type = cpu_to_le16(TLV_TYPE_WAPI_IE);
  ie_header.len = cpu_to_le16(priv->wapi_ie_len);
  memcpy(*buffer, &ie_header, sizeof(ie_header));

  /* Increment the return size and the return buffer pointer
   param */
  *buffer += sizeof(ie_header);
  retLen += sizeof(ie_header);

  /* Copy the wapi IE buffer to the output buffer, advance
   pointer */
  memcpy(*buffer, priv->wapi_ie, priv->wapi_ie_len);

  /* Increment the return size and the return buffer pointer
   param */
  *buffer += priv->wapi_ie_len;
  retLen += priv->wapi_ie_len;

 }
 /* return the length appended to the buffer */
 return retLen;
}

/*
 * This function appends rsn ie tlv for wpa/wpa2 security modes.
 * It is called from the network join command preparation routine.
 */
static int mwifiex_append_rsn_ie_wpa_wpa2(struct mwifiex_private *priv,
       u8 **buffer)
{
 struct mwifiex_ie_types_rsn_param_set *rsn_ie_tlv;
 int rsn_ie_len;

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

 rsn_ie_tlv = (struct mwifiex_ie_types_rsn_param_set *) (*buffer);
 rsn_ie_tlv->header.type = cpu_to_le16((u16) priv->wpa_ie[0]);
 rsn_ie_tlv->header.type = cpu_to_le16(
     le16_to_cpu(rsn_ie_tlv->header.type) & 0x00FF);
 rsn_ie_tlv->header.len = cpu_to_le16((u16) priv->wpa_ie[1]);
 rsn_ie_tlv->header.len = cpu_to_le16(le16_to_cpu(rsn_ie_tlv->header.len)
        & 0x00FF);
 if (le16_to_cpu(rsn_ie_tlv->header.len) <= (sizeof(priv->wpa_ie) - 2))
  memcpy(rsn_ie_tlv->rsn_ie, &priv->wpa_ie[2],
         le16_to_cpu(rsn_ie_tlv->header.len));
 else
  return -1;

 rsn_ie_len = sizeof(rsn_ie_tlv->header) +
     le16_to_cpu(rsn_ie_tlv->header.len);
 *buffer += rsn_ie_len;

 return rsn_ie_len;
}

/*
 * This function prepares command for association.
 *
 * This sets the following parameters -
 *      - Peer MAC address
 *      - Listen interval
 *      - Beacon interval
 *      - Capability information
 *
 * ...and the following TLVs, as required -
 *      - SSID TLV
 *      - PHY TLV
 *      - SS TLV
 *      - Rates TLV
 *      - Authentication TLV
 *      - Channel TLV
 *      - WPA/WPA2 IE
 *      - 11n TLV
 *      - Vendor specific TLV
 *      - WMM TLV
 *      - WAPI IE
 *      - Generic IE
 *      - TSF TLV
 *
 * Preparation also includes -
 *      - Setting command ID and proper size
 *      - Ensuring correct endian-ness
 */
int mwifiex_cmd_802_11_associate(struct mwifiex_private *priv,
     struct host_cmd_ds_command *cmd,
     struct mwifiex_bssdescriptor *bss_desc)
{
 struct host_cmd_ds_802_11_associate *assoc = &cmd->params.associate;
 struct mwifiex_ie_types_ssid_param_set *ssid_tlv;
 struct mwifiex_ie_types_phy_param_set *phy_tlv;
 struct mwifiex_ie_types_ss_param_set *ss_tlv;
 struct mwifiex_ie_types_rates_param_set *rates_tlv;
 struct mwifiex_ie_types_auth_type *auth_tlv;
 struct mwifiex_ie_types_sae_pwe_mode *sae_pwe_tlv;
 struct mwifiex_ie_types_chan_list_param_set *chan_tlv;
 struct mwifiex_ie_types_host_mlme *host_mlme_tlv;
 u8 rates[MWIFIEX_SUPPORTED_RATES];
 u32 rates_size;
 u16 tmp_cap;
 u8 *pos;
 int rsn_ie_len = 0;

 pos = (u8 *) assoc;

 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_ASSOCIATE);

 /* Save so we know which BSS Desc to use in the response handler */
 priv->attempted_bss_desc = bss_desc;

 memcpy(assoc->peer_sta_addr,
        bss_desc->mac_address, sizeof(assoc->peer_sta_addr));
 pos += sizeof(assoc->peer_sta_addr);

 /* Set the listen interval */
 assoc->listen_interval = cpu_to_le16(priv->listen_interval);
 /* Set the beacon period */
 assoc->beacon_period = cpu_to_le16(bss_desc->beacon_period);

 pos += sizeof(assoc->cap_info_bitmap);
 pos += sizeof(assoc->listen_interval);
 pos += sizeof(assoc->beacon_period);
 pos += sizeof(assoc->dtim_period);

 ssid_tlv = (struct mwifiex_ie_types_ssid_param_set *) pos;
 ssid_tlv->header.type = cpu_to_le16(WLAN_EID_SSID);
 ssid_tlv->header.len = cpu_to_le16((u16) bss_desc->ssid.ssid_len);
 memcpy(ssid_tlv->ssid, bss_desc->ssid.ssid,
        le16_to_cpu(ssid_tlv->header.len));
 pos += sizeof(ssid_tlv->header) + le16_to_cpu(ssid_tlv->header.len);

 phy_tlv = (struct mwifiex_ie_types_phy_param_set *) pos;
 phy_tlv->header.type = cpu_to_le16(WLAN_EID_DS_PARAMS);
 phy_tlv->header.len = cpu_to_le16(sizeof(phy_tlv->fh_ds.ds_param_set));
 memcpy(&phy_tlv->fh_ds.ds_param_set,
        &bss_desc->phy_param_set.ds_param_set.current_chan,
        sizeof(phy_tlv->fh_ds.ds_param_set));
 pos += sizeof(phy_tlv->header) + le16_to_cpu(phy_tlv->header.len);

 ss_tlv = (struct mwifiex_ie_types_ss_param_set *) pos;
 ss_tlv->header.type = cpu_to_le16(WLAN_EID_CF_PARAMS);
 ss_tlv->header.len = cpu_to_le16(sizeof(ss_tlv->cf_ibss.cf_param_set));
 pos += sizeof(ss_tlv->header) + le16_to_cpu(ss_tlv->header.len);

 /* Get the common rates supported between the driver and the BSS Desc */
 if (mwifiex_setup_rates_from_bssdesc
     (priv, bss_desc, rates, &rates_size))
  return -1;

 /* Save the data rates into Current BSS state structure */
 priv->curr_bss_params.num_of_rates = rates_size;
 memcpy(&priv->curr_bss_params.data_rates, rates, rates_size);

 /* Setup the Rates TLV in the association command */
 rates_tlv = (struct mwifiex_ie_types_rates_param_set *) 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);
 pos += sizeof(rates_tlv->header) + rates_size;
 mwifiex_dbg(priv->adapter, INFO, "info: ASSOC_CMD: rates size = %d\n",
      rates_size);

 /* Add the Authentication type to be used for Auth frames */
 auth_tlv = (struct mwifiex_ie_types_auth_type *) pos;
 auth_tlv->header.type = cpu_to_le16(TLV_TYPE_AUTH_TYPE);
 auth_tlv->header.len = cpu_to_le16(sizeof(auth_tlv->auth_type));
 if (priv->sec_info.wep_enabled)
  auth_tlv->auth_type = cpu_to_le16(
    (u16) priv->sec_info.authentication_mode);
 else
  auth_tlv->auth_type = cpu_to_le16(NL80211_AUTHTYPE_OPEN_SYSTEM);

 pos += sizeof(auth_tlv->header) + le16_to_cpu(auth_tlv->header.len);

 if (priv->sec_info.authentication_mode == WLAN_AUTH_SAE) {
  auth_tlv->auth_type = cpu_to_le16(MWIFIEX_AUTHTYPE_SAE);
  if (bss_desc->bcn_rsnx_ie &&
      bss_desc->bcn_rsnx_ie->ieee_hdr.len &&
      (bss_desc->bcn_rsnx_ie->data[0] &
      WLAN_RSNX_CAPA_SAE_H2E)) {
   sae_pwe_tlv =
    (struct mwifiex_ie_types_sae_pwe_mode *)pos;
   sae_pwe_tlv->header.type =
    cpu_to_le16(TLV_TYPE_SAE_PWE_MODE);
   sae_pwe_tlv->header.len =
    cpu_to_le16(sizeof(sae_pwe_tlv->pwe[0]));
   sae_pwe_tlv->pwe[0] = bss_desc->bcn_rsnx_ie->data[0];
   pos += sizeof(sae_pwe_tlv->header) +
    sizeof(sae_pwe_tlv->pwe[0]);
  }
 }

 if (IS_SUPPORT_MULTI_BANDS(priv->adapter) &&
     !(ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
     (!bss_desc->disable_11n) &&
     (priv->adapter->config_bands & BAND_GN ||
      priv->adapter->config_bands & BAND_AN) &&
     (bss_desc->bcn_ht_cap)
     )
  ) {
  /* Append a channel TLV for the channel the attempted AP was
   found on */
  chan_tlv = (struct mwifiex_ie_types_chan_list_param_set *) pos;
  chan_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
  chan_tlv->header.len =
   cpu_to_le16(sizeof(struct mwifiex_chan_scan_param_set));

  memset(chan_tlv->chan_scan_param, 0x00,
         sizeof(struct mwifiex_chan_scan_param_set));
  chan_tlv->chan_scan_param[0].chan_number =
   (bss_desc->phy_param_set.ds_param_set.current_chan);
  mwifiex_dbg(priv->adapter, INFO, "info: Assoc: TLV Chan = %d\n",
       chan_tlv->chan_scan_param[0].chan_number);

  chan_tlv->chan_scan_param[0].radio_type =
   mwifiex_band_to_radio_type((u8) bss_desc->bss_band);

  mwifiex_dbg(priv->adapter, INFO, "info: Assoc: TLV Band = %d\n",
       chan_tlv->chan_scan_param[0].radio_type);
  pos += sizeof(chan_tlv->header) +
   sizeof(struct mwifiex_chan_scan_param_set);
 }

 if (priv->adapter->host_mlme_enabled) {
  host_mlme_tlv = (struct mwifiex_ie_types_host_mlme *)pos;
  host_mlme_tlv->header.type = cpu_to_le16(TLV_TYPE_HOST_MLME);
  host_mlme_tlv->header.len =
   cpu_to_le16(sizeof(host_mlme_tlv->host_mlme));
  host_mlme_tlv->host_mlme = 1;
  pos += sizeof(host_mlme_tlv->header) +
   sizeof(host_mlme_tlv->host_mlme);
 }

 if (!priv->wps.session_enable) {
  if (priv->sec_info.wpa_enabled || priv->sec_info.wpa2_enabled)
   rsn_ie_len = mwifiex_append_rsn_ie_wpa_wpa2(priv, &pos);

  if (rsn_ie_len == -1)
   return -1;
 }

 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info) &&
     (!bss_desc->disable_11n) &&
     (priv->adapter->config_bands & BAND_GN ||
      priv->adapter->config_bands & BAND_AN))
  mwifiex_cmd_append_11n_tlv(priv, bss_desc, &pos);

 if (ISSUPP_11ACENABLED(priv->adapter->fw_cap_info) &&
     !bss_desc->disable_11n && !bss_desc->disable_11ac &&
     priv->adapter->config_bands & BAND_AAC)
  mwifiex_cmd_append_11ac_tlv(priv, bss_desc, &pos);

 /* Append vendor specific IE TLV */
 mwifiex_cmd_append_vsie_tlv(priv, MWIFIEX_VSIE_MASK_ASSOC, &pos);

 mwifiex_wmm_process_association_req(priv, &pos, &bss_desc->wmm_ie,
         bss_desc->bcn_ht_cap);
 if (priv->sec_info.wapi_enabled && priv->wapi_ie_len)
  mwifiex_cmd_append_wapi_ie(priv, &pos);

 if (priv->wps.session_enable && priv->wps_ie_len)
  mwifiex_cmd_append_wps_ie(priv, &pos);

 mwifiex_cmd_append_generic_ie(priv, &pos);

 mwifiex_cmd_append_tsf_tlv(priv, &pos, bss_desc);

 mwifiex_11h_process_join(priv, &pos, bss_desc);

 cmd->size = cpu_to_le16((u16) (pos - (u8 *) assoc) + S_DS_GEN);

 /* Set the Capability info at last */
 tmp_cap = bss_desc->cap_info_bitmap;

 if (priv->adapter->config_bands == BAND_B)
  tmp_cap &= ~WLAN_CAPABILITY_SHORT_SLOT_TIME;

 tmp_cap &= CAPINFO_MASK;
 mwifiex_dbg(priv->adapter, INFO,
      "info: ASSOC_CMD: tmp_cap=%4X CAPINFO_MASK=%4lX\n",
      tmp_cap, CAPINFO_MASK);
 assoc->cap_info_bitmap = cpu_to_le16(tmp_cap);

 return 0;
}

static const char *assoc_failure_reason_to_str(u16 cap_info)
{
 switch (cap_info) {
 case CONNECT_ERR_AUTH_ERR_STA_FAILURE:
  return "CONNECT_ERR_AUTH_ERR_STA_FAILURE";
 case CONNECT_ERR_AUTH_MSG_UNHANDLED:
  return "CONNECT_ERR_AUTH_MSG_UNHANDLED";
 case CONNECT_ERR_ASSOC_ERR_TIMEOUT:
  return "CONNECT_ERR_ASSOC_ERR_TIMEOUT";
 case CONNECT_ERR_ASSOC_ERR_AUTH_REFUSED:
  return "CONNECT_ERR_ASSOC_ERR_AUTH_REFUSED";
 case CONNECT_ERR_STA_FAILURE:
  return "CONNECT_ERR_STA_FAILURE";
 }

 return "Unknown connect failure";
}
/*
 * Association firmware command response handler
 *
 * The response buffer for the association command has the following
 * memory layout.
 *
 * For cases where an association response was not received (indicated
 * by the CapInfo and AId field):
 *
 *     .------------------------------------------------------------.
 *     |  Header(4 * sizeof(t_u16)):  Standard command response hdr |
 *     .------------------------------------------------------------.
 *     |  cap_info/Error Return(t_u16):                             |
 *     |           0xFFFF(-1): Internal error                       |
 *     |           0xFFFE(-2): Authentication unhandled message     |
 *     |           0xFFFD(-3): Authentication refused               |
 *     |           0xFFFC(-4): Timeout waiting for AP response      |
 *     .------------------------------------------------------------.
 *     |  status_code(t_u16):                                       |
 *     |        If cap_info is -1:                                  |
 *     |           An internal firmware failure prevented the       |
 *     |           command from being processed.  The status_code   |
 *     |           will be set to 1.                                |
 *     |                                                            |
 *     |        If cap_info is -2:                                  |
 *     |           An authentication frame was received but was     |
 *     |           not handled by the firmware.  IEEE Status        |
 *     |           code for the failure is returned.                |
 *     |                                                            |
 *     |        If cap_info is -3:                                  |
 *     |           An authentication frame was received and the     |
 *     |           status_code is the IEEE Status reported in the   |
 *     |           response.                                        |
 *     |                                                            |
 *     |        If cap_info is -4:                                  |
 *     |           (1) Association response timeout                 |
 *     |           (2) Authentication response timeout              |
 *     .------------------------------------------------------------.
 *     |  a_id(t_u16): 0xFFFF                                       |
 *     .------------------------------------------------------------.
 *
 *
 * For cases where an association response was received, the IEEE
 * standard association response frame is returned:
 *
 *     .------------------------------------------------------------.
 *     |  Header(4 * sizeof(t_u16)):  Standard command response hdr |
 *     .------------------------------------------------------------.
 *     |  cap_info(t_u16): IEEE Capability                          |
 *     .------------------------------------------------------------.
 *     |  status_code(t_u16): IEEE Status Code                      |
 *     .------------------------------------------------------------.
 *     |  a_id(t_u16): IEEE Association ID                          |
 *     .------------------------------------------------------------.
 *     |  IEEE IEs(variable): Any received IEs comprising the       |
 *     |                      remaining portion of a received       |
 *     |                      association response frame.           |
 *     .------------------------------------------------------------.
 *
 * For simplistic handling, the status_code field can be used to determine
 * an association success (0) or failure (non-zero).
 */
int mwifiex_ret_802_11_associate(struct mwifiex_private *priv,
        struct host_cmd_ds_command *resp)
{
 struct mwifiex_adapter *adapter = priv->adapter;
 int ret = 0;
 struct ieee_types_assoc_rsp *assoc_rsp;
 struct mwifiex_bssdescriptor *bss_desc;
 bool enable_data = true;
 u16 cap_info, status_code, aid;
 const u8 *ie_ptr;

 if (!priv->attempted_bss_desc) {
  mwifiex_dbg(priv->adapter, ERROR,
       "ASSOC_RESP: failed, association terminated by host\n");
  goto done;
 }

 if (adapter->host_mlme_enabled) {
  struct ieee80211_mgmt *hdr;

  hdr = (struct ieee80211_mgmt *)&resp->params;
  if (!memcmp(hdr->bssid,
       priv->attempted_bss_desc->mac_address,
       ETH_ALEN))
   assoc_rsp = (struct ieee_types_assoc_rsp *)
    &hdr->u.assoc_resp;
  else
   assoc_rsp =
    (struct ieee_types_assoc_rsp *)&resp->params;
 } else {
  assoc_rsp = (struct ieee_types_assoc_rsp *)&resp->params;
 }

 cap_info = le16_to_cpu(assoc_rsp->cap_info_bitmap);
 status_code = le16_to_cpu(assoc_rsp->status_code);
 aid = le16_to_cpu(assoc_rsp->a_id);

 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
  dev_err(priv->adapter->dev,
   "invalid AID value 0x%x; bits 15:14 not set\n",
   aid);

 aid &= ~(BIT(15) | BIT(14));

 priv->assoc_rsp_size = min(le16_to_cpu(resp->size) - S_DS_GEN,
       sizeof(priv->assoc_rsp_buf));

 assoc_rsp->a_id = cpu_to_le16(aid);
 memcpy(priv->assoc_rsp_buf, &resp->params, priv->assoc_rsp_size);

 if (status_code) {
  priv->adapter->dbg.num_cmd_assoc_failure++;
  mwifiex_dbg(priv->adapter, ERROR,
       "ASSOC_RESP: failed,\t"
       "status code=%d err=%#x a_id=%#x\n",
       status_code, cap_info,
       le16_to_cpu(assoc_rsp->a_id));

  mwifiex_dbg(priv->adapter, ERROR, "assoc failure: reason %s\n",
       assoc_failure_reason_to_str(cap_info));
  if (cap_info == CONNECT_ERR_ASSOC_ERR_TIMEOUT) {
   if (status_code == MWIFIEX_ASSOC_CMD_FAILURE_AUTH) {
    ret = WLAN_STATUS_AUTH_TIMEOUT;
    mwifiex_dbg(priv->adapter, ERROR,
         "ASSOC_RESP: AUTH timeout\n");
   } else {
    ret = WLAN_STATUS_UNSPECIFIED_FAILURE;
    mwifiex_dbg(priv->adapter, ERROR,
         "ASSOC_RESP: UNSPECIFIED failure\n");
   }

   if (priv->adapter->host_mlme_enabled)
    priv->assoc_rsp_size = 0;
  } else {
   ret = status_code;
  }

  goto done;
 }

 /* Send a Media Connected event, according to the Spec */
 priv->media_connected = true;

 priv->adapter->ps_state = PS_STATE_AWAKE;
 priv->adapter->pps_uapsd_mode = false;
 priv->adapter->tx_lock_flag = false;

 /* Set the attempted BSSID Index to current */
 bss_desc = priv->attempted_bss_desc;

 mwifiex_dbg(priv->adapter, INFO, "info: ASSOC_RESP: %s\n",
      bss_desc->ssid.ssid);

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

 /* Update curr_bss_params */
 priv->curr_bss_params.bss_descriptor.channel
  = bss_desc->phy_param_set.ds_param_set.current_chan;

 priv->curr_bss_params.band = (u8) bss_desc->bss_band;

 if (bss_desc->wmm_ie.vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC)
  priv->curr_bss_params.wmm_enabled = true;
 else
  priv->curr_bss_params.wmm_enabled = false;

 if ((priv->wmm_required || bss_desc->bcn_ht_cap) &&
     priv->curr_bss_params.wmm_enabled)
  priv->wmm_enabled = true;
 else
  priv->wmm_enabled = false;

 priv->curr_bss_params.wmm_uapsd_enabled = false;

 if (priv->wmm_enabled)
  priv->curr_bss_params.wmm_uapsd_enabled
   = ((bss_desc->wmm_ie.qos_info_bitmap &
    IEEE80211_WMM_IE_AP_QOSINFO_UAPSD) ? 1 : 0);

 /* Store the bandwidth information from assoc response */
 ie_ptr = cfg80211_find_ie(WLAN_EID_HT_OPERATION, assoc_rsp->ie_buffer,
      priv->assoc_rsp_size
      - sizeof(struct ieee_types_assoc_rsp));

 priv->ht_param_present = ie_ptr ? true : false;

 mwifiex_dbg(priv->adapter, INFO,
      "info: ASSOC_RESP: curr_pkt_filter is %#x\n",
      priv->curr_pkt_filter);
 if (priv->sec_info.wpa_enabled || priv->sec_info.wpa2_enabled)
  priv->wpa_is_gtk_set = false;

 if (priv->wmm_enabled) {
  /* Don't re-enable carrier until we get the WMM_GET_STATUS
   event */
  enable_data = false;
 } else {
  /* Since WMM is not enabled, setup the queues with the
   defaults */
  mwifiex_wmm_setup_queue_priorities(priv, NULL);
  mwifiex_wmm_setup_ac_downgrade(priv);
 }

 if (enable_data)
  mwifiex_dbg(priv->adapter, INFO,
       "info: post association, re-enabling data flow\n");

 /* Reset SNR/NF/RSSI values */
 priv->data_rssi_last = 0;
 priv->data_nf_last = 0;
 priv->data_rssi_avg = 0;
 priv->data_nf_avg = 0;
 priv->bcn_rssi_last = 0;
 priv->bcn_nf_last = 0;
 priv->bcn_rssi_avg = 0;
 priv->bcn_nf_avg = 0;
 priv->rxpd_rate = 0;
 priv->rxpd_htinfo = 0;

 mwifiex_save_curr_bcn(priv);

 priv->adapter->dbg.num_cmd_assoc_success++;

 mwifiex_dbg(priv->adapter, MSG, "assoc: associated with %pM\n",
      priv->attempted_bss_desc->mac_address);

 /* Add the ra_list here for infra mode as there will be only 1 ra
   always */
 mwifiex_ralist_add(priv,
      priv->curr_bss_params.bss_descriptor.mac_address);

 if (!netif_carrier_ok(priv->netdev))
  netif_carrier_on(priv->netdev);
 mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);

 if (priv->sec_info.wpa_enabled || priv->sec_info.wpa2_enabled)
  priv->scan_block = true;
 else
  priv->port_open = true;

done:
 /* Need to indicate IOCTL complete */
 if (adapter->curr_cmd->wait_q_enabled) {
  if (ret)
   adapter->cmd_wait_q.status = -1;
  else
   adapter->cmd_wait_q.status = 0;
 }

 return ret;
}

/*
 * This function prepares command for ad-hoc start.
 *
 * Driver will fill up SSID, BSS mode, IBSS parameters, physical
 * parameters, probe delay, and capability information. Firmware
 * will fill up beacon period, basic rates and operational rates.
 *
 * In addition, the following TLVs are added -
 *      - Channel TLV
 *      - Vendor specific IE
 *      - WPA/WPA2 IE
 *      - HT Capabilities IE
 *      - HT Information IE
 *
 * Preparation also includes -
 *      - Setting command ID and proper size
 *      - Ensuring correct endian-ness
 */
int
mwifiex_cmd_802_11_ad_hoc_start(struct mwifiex_private *priv,
    struct host_cmd_ds_command *cmd,
    struct cfg80211_ssid *req_ssid)
{
 int rsn_ie_len = 0;
 struct mwifiex_adapter *adapter = priv->adapter;
 struct host_cmd_ds_802_11_ad_hoc_start *adhoc_start =
  &cmd->params.adhoc_start;
 struct mwifiex_bssdescriptor *bss_desc;
 u32 cmd_append_size = 0;
 u32 i;
 u16 tmp_cap;
 struct mwifiex_ie_types_chan_list_param_set *chan_tlv;
 u8 radio_type;

 struct mwifiex_ie_types_htcap *ht_cap;
 struct mwifiex_ie_types_htinfo *ht_info;
 u8 *pos = (u8 *) adhoc_start +
   sizeof(struct host_cmd_ds_802_11_ad_hoc_start);

 if (!adapter)
  return -1;

 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_AD_HOC_START);

 bss_desc = &priv->curr_bss_params.bss_descriptor;
 priv->attempted_bss_desc = bss_desc;

 /*
 * Fill in the parameters for 2 data structures:
 *   1. struct host_cmd_ds_802_11_ad_hoc_start command
 *   2. bss_desc
 * Driver will fill up SSID, bss_mode,IBSS param, Physical Param,
 * probe delay, and Cap info.
 * Firmware will fill up beacon period, Basic rates
 * and operational rates.
 */

 memset(adhoc_start->ssid, 0, IEEE80211_MAX_SSID_LEN);

 if (req_ssid->ssid_len > IEEE80211_MAX_SSID_LEN)
  req_ssid->ssid_len = IEEE80211_MAX_SSID_LEN;
 memcpy(adhoc_start->ssid, req_ssid->ssid, req_ssid->ssid_len);

 mwifiex_dbg(adapter, INFO, "info: ADHOC_S_CMD: SSID = %s\n",
      adhoc_start->ssid);

 memset(bss_desc->ssid.ssid, 0, IEEE80211_MAX_SSID_LEN);
 memcpy(bss_desc->ssid.ssid, req_ssid->ssid, req_ssid->ssid_len);

 bss_desc->ssid.ssid_len = req_ssid->ssid_len;

 /* Set the BSS mode */
 adhoc_start->bss_mode = HostCmd_BSS_MODE_IBSS;
 bss_desc->bss_mode = NL80211_IFTYPE_ADHOC;
 adhoc_start->beacon_period = cpu_to_le16(priv->beacon_period);
 bss_desc->beacon_period = priv->beacon_period;

 /* Set Physical param set */
/* Parameter IE Id */
#define DS_PARA_IE_ID   3
/* Parameter IE length */
#define DS_PARA_IE_LEN  1

 adhoc_start->phy_param_set.ds_param_set.element_id = DS_PARA_IE_ID;
 adhoc_start->phy_param_set.ds_param_set.len = DS_PARA_IE_LEN;

 if (!mwifiex_get_cfp(priv, adapter->adhoc_start_band,
        (u16) priv->adhoc_channel, 0)) {
  struct mwifiex_chan_freq_power *cfp;
  cfp = mwifiex_get_cfp(priv, adapter->adhoc_start_band,
          FIRST_VALID_CHANNEL, 0);
  if (cfp)
   priv->adhoc_channel = (u8) cfp->channel;
 }

 if (!priv->adhoc_channel) {
  mwifiex_dbg(adapter, ERROR,
       "ADHOC_S_CMD: adhoc_channel cannot be 0\n");
  return -1;
 }

 mwifiex_dbg(adapter, INFO,
      "info: ADHOC_S_CMD: creating ADHOC on channel %d\n",
      priv->adhoc_channel);

 priv->curr_bss_params.bss_descriptor.channel = priv->adhoc_channel;
 priv->curr_bss_params.band = adapter->adhoc_start_band;

 bss_desc->channel = priv->adhoc_channel;
 adhoc_start->phy_param_set.ds_param_set.current_chan =
  priv->adhoc_channel;

 memcpy(&bss_desc->phy_param_set, &adhoc_start->phy_param_set,
        sizeof(union ieee_types_phy_param_set));

 /* Set IBSS param set */
/* IBSS parameter IE Id */
#define IBSS_PARA_IE_ID   6
/* IBSS parameter IE length */
#define IBSS_PARA_IE_LEN  2

 adhoc_start->ss_param_set.ibss_param_set.element_id = IBSS_PARA_IE_ID;
 adhoc_start->ss_param_set.ibss_param_set.len = IBSS_PARA_IE_LEN;
 adhoc_start->ss_param_set.ibss_param_set.atim_window
     = cpu_to_le16(priv->atim_window);
 memcpy(&bss_desc->ss_param_set, &adhoc_start->ss_param_set,
        sizeof(union ieee_types_ss_param_set));

 /* Set Capability info */
 bss_desc->cap_info_bitmap |= WLAN_CAPABILITY_IBSS;
 tmp_cap = WLAN_CAPABILITY_IBSS;

 /* Set up privacy in bss_desc */
 if (priv->sec_info.encryption_mode) {
  /* Ad-Hoc capability privacy on */
  mwifiex_dbg(adapter, INFO,
       "info: ADHOC_S_CMD: wep_status set privacy to WEP\n");
  bss_desc->privacy = MWIFIEX_802_11_PRIV_FILTER_8021X_WEP;
  tmp_cap |= WLAN_CAPABILITY_PRIVACY;
 } else {
  mwifiex_dbg(adapter, INFO,
       "info: ADHOC_S_CMD: wep_status NOT set,\t"
       "setting privacy to ACCEPT ALL\n");
  bss_desc->privacy = MWIFIEX_802_11_PRIV_FILTER_ACCEPT_ALL;
 }

 memset(adhoc_start->data_rate, 0, sizeof(adhoc_start->data_rate));
 mwifiex_get_active_data_rates(priv, adhoc_start->data_rate);
 if ((adapter->adhoc_start_band & BAND_G) &&
     (priv->curr_pkt_filter & HostCmd_ACT_MAC_ADHOC_G_PROTECTION_ON)) {
  if (mwifiex_send_cmd(priv, HostCmd_CMD_MAC_CONTROL,
         HostCmd_ACT_GEN_SET, 0,
         &priv->curr_pkt_filter, false)) {
   mwifiex_dbg(adapter, ERROR,
        "ADHOC_S_CMD: G Protection config failed\n");
   return -1;
  }
 }
 /* Find the last non zero */
 for (i = 0; i < sizeof(adhoc_start->data_rate); i++)
  if (!adhoc_start->data_rate[i])
   break;

 priv->curr_bss_params.num_of_rates = i;

 /* Copy the ad-hoc creating rates into Current BSS rate structure */
 memcpy(&priv->curr_bss_params.data_rates,
        &adhoc_start->data_rate, priv->curr_bss_params.num_of_rates);

 mwifiex_dbg(adapter, INFO, "info: ADHOC_S_CMD: rates=%4ph\n",
      adhoc_start->data_rate);

 mwifiex_dbg(adapter, INFO, "info: ADHOC_S_CMD: AD-HOC Start command is ready\n");

 if (IS_SUPPORT_MULTI_BANDS(adapter)) {
  /* Append a channel TLV */
  chan_tlv = (struct mwifiex_ie_types_chan_list_param_set *) pos;
  chan_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
  chan_tlv->header.len =
   cpu_to_le16(sizeof(struct mwifiex_chan_scan_param_set));

  memset(chan_tlv->chan_scan_param, 0x00,
         sizeof(struct mwifiex_chan_scan_param_set));
  chan_tlv->chan_scan_param[0].chan_number =
   (u8) priv->curr_bss_params.bss_descriptor.channel;

  mwifiex_dbg(adapter, INFO, "info: ADHOC_S_CMD: TLV Chan = %d\n",
       chan_tlv->chan_scan_param[0].chan_number);

  chan_tlv->chan_scan_param[0].radio_type
         = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
  if (adapter->adhoc_start_band & BAND_GN ||
      adapter->adhoc_start_band & BAND_AN) {
   if (adapter->sec_chan_offset ==
         IEEE80211_HT_PARAM_CHA_SEC_ABOVE)
    chan_tlv->chan_scan_param[0].radio_type |=
     (IEEE80211_HT_PARAM_CHA_SEC_ABOVE << 4);
   else if (adapter->sec_chan_offset ==
         IEEE80211_HT_PARAM_CHA_SEC_BELOW)
    chan_tlv->chan_scan_param[0].radio_type |=
     (IEEE80211_HT_PARAM_CHA_SEC_BELOW << 4);
  }
  mwifiex_dbg(adapter, INFO, "info: ADHOC_S_CMD: TLV Band = %d\n",
       chan_tlv->chan_scan_param[0].radio_type);
  pos += sizeof(chan_tlv->header) +
   sizeof(struct mwifiex_chan_scan_param_set);
  cmd_append_size +=
   sizeof(chan_tlv->header) +
   sizeof(struct mwifiex_chan_scan_param_set);
 }

 /* Append vendor specific IE TLV */
 cmd_append_size += mwifiex_cmd_append_vsie_tlv(priv,
    MWIFIEX_VSIE_MASK_ADHOC, &pos);

 if (priv->sec_info.wpa_enabled) {
  rsn_ie_len = mwifiex_append_rsn_ie_wpa_wpa2(priv, &pos);
  if (rsn_ie_len == -1)
   return -1;
  cmd_append_size += rsn_ie_len;
 }

 if (adapter->adhoc_11n_enabled) {
  /* Fill HT CAPABILITY */
  ht_cap = (struct mwifiex_ie_types_htcap *) 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);

  if (adapter->sec_chan_offset ==
     IEEE80211_HT_PARAM_CHA_SEC_NONE) {
   u16 tmp_ht_cap;

   tmp_ht_cap = le16_to_cpu(ht_cap->ht_cap.cap_info);
   tmp_ht_cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
   tmp_ht_cap &= ~IEEE80211_HT_CAP_SGI_40;
   ht_cap->ht_cap.cap_info = cpu_to_le16(tmp_ht_cap);
  }

  pos += sizeof(struct mwifiex_ie_types_htcap);
  cmd_append_size += sizeof(struct mwifiex_ie_types_htcap);

  /* Fill HT INFORMATION */
  ht_info = (struct mwifiex_ie_types_htinfo *) pos;
  memset(ht_info, 0, sizeof(struct mwifiex_ie_types_htinfo));
  ht_info->header.type = cpu_to_le16(WLAN_EID_HT_OPERATION);
  ht_info->header.len =
   cpu_to_le16(sizeof(struct ieee80211_ht_operation));

  ht_info->ht_oper.primary_chan =
   (u8) priv->curr_bss_params.bss_descriptor.channel;
  if (adapter->sec_chan_offset) {
   ht_info->ht_oper.ht_param = adapter->sec_chan_offset;
   ht_info->ht_oper.ht_param |=
     IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
  }
  ht_info->ht_oper.operation_mode =
       cpu_to_le16(IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT);
  ht_info->ht_oper.basic_set[0] = 0xff;
  pos += sizeof(struct mwifiex_ie_types_htinfo);
  cmd_append_size +=
    sizeof(struct mwifiex_ie_types_htinfo);
 }

 cmd->size =
  cpu_to_le16((u16)(sizeof(struct host_cmd_ds_802_11_ad_hoc_start)
      + S_DS_GEN + cmd_append_size));

 if (adapter->adhoc_start_band == BAND_B)
  tmp_cap &= ~WLAN_CAPABILITY_SHORT_SLOT_TIME;
 else
  tmp_cap |= WLAN_CAPABILITY_SHORT_SLOT_TIME;

 adhoc_start->cap_info_bitmap = cpu_to_le16(tmp_cap);

 return 0;
}

/*
 * This function prepares command for ad-hoc join.
 *
 * Most of the parameters are set up by copying from the target BSS descriptor
 * from the scan response.
 *
 * In addition, the following TLVs are added -
 *      - Channel TLV
 *      - Vendor specific IE
 *      - WPA/WPA2 IE
 *      - 11n IE
 *
 * Preparation also includes -
 *      - Setting command ID and proper size
 *      - Ensuring correct endian-ness
 */
int
mwifiex_cmd_802_11_ad_hoc_join(struct mwifiex_private *priv,
          struct host_cmd_ds_command *cmd,
          struct mwifiex_bssdescriptor *bss_desc)
{
 int rsn_ie_len = 0;
 struct host_cmd_ds_802_11_ad_hoc_join *adhoc_join =
  &cmd->params.adhoc_join;
 struct mwifiex_ie_types_chan_list_param_set *chan_tlv;
 u32 cmd_append_size = 0;
 u16 tmp_cap;
 u32 i, rates_size = 0;
 u16 curr_pkt_filter;
 u8 *pos =
  (u8 *) adhoc_join +
  sizeof(struct host_cmd_ds_802_11_ad_hoc_join);

/* Use G protection */
#define USE_G_PROTECTION        0x02
 if (bss_desc->erp_flags & USE_G_PROTECTION) {
  curr_pkt_filter =
   priv->
   curr_pkt_filter | HostCmd_ACT_MAC_ADHOC_G_PROTECTION_ON;

  if (mwifiex_send_cmd(priv, HostCmd_CMD_MAC_CONTROL,
         HostCmd_ACT_GEN_SET, 0,
         &curr_pkt_filter, false)) {
   mwifiex_dbg(priv->adapter, ERROR,
        "ADHOC_J_CMD: G Protection config failed\n");
   return -1;
  }
 }

 priv->attempted_bss_desc = bss_desc;

 cmd->command = cpu_to_le16(HostCmd_CMD_802_11_AD_HOC_JOIN);

 adhoc_join->bss_descriptor.bss_mode = HostCmd_BSS_MODE_IBSS;

 adhoc_join->bss_descriptor.beacon_period
  = cpu_to_le16(bss_desc->beacon_period);

 memcpy(&adhoc_join->bss_descriptor.bssid,
        &bss_desc->mac_address, ETH_ALEN);

 memcpy(&adhoc_join->bss_descriptor.ssid,
        &bss_desc->ssid.ssid, bss_desc->ssid.ssid_len);

 memcpy(&adhoc_join->bss_descriptor.phy_param_set,
        &bss_desc->phy_param_set,
        sizeof(union ieee_types_phy_param_set));

 memcpy(&adhoc_join->bss_descriptor.ss_param_set,
        &bss_desc->ss_param_set, sizeof(union ieee_types_ss_param_set));

 tmp_cap = bss_desc->cap_info_bitmap;

 tmp_cap &= CAPINFO_MASK;

 mwifiex_dbg(priv->adapter, INFO,
      "info: ADHOC_J_CMD: tmp_cap=%4X CAPINFO_MASK=%4lX\n",
      tmp_cap, CAPINFO_MASK);

 /* Information on BSSID descriptor passed to FW */
 mwifiex_dbg(priv->adapter, INFO,
      "info: ADHOC_J_CMD: BSSID=%pM, SSID='%s'\n",
      adhoc_join->bss_descriptor.bssid,
      adhoc_join->bss_descriptor.ssid);

 for (i = 0; i < MWIFIEX_SUPPORTED_RATES &&
      bss_desc->supported_rates[i]; i++)
  ;
 rates_size = i;

 /* Copy Data Rates from the Rates recorded in scan response */
 memset(adhoc_join->bss_descriptor.data_rates, 0,
        sizeof(adhoc_join->bss_descriptor.data_rates));
 memcpy(adhoc_join->bss_descriptor.data_rates,
        bss_desc->supported_rates, rates_size);

 /* Copy the adhoc join rates into Current BSS state structure */
 priv->curr_bss_params.num_of_rates = rates_size;
 memcpy(&priv->curr_bss_params.data_rates, bss_desc->supported_rates,
        rates_size);

 /* Copy the channel information */
 priv->curr_bss_params.bss_descriptor.channel = bss_desc->channel;
 priv->curr_bss_params.band = (u8) bss_desc->bss_band;

 if (priv->sec_info.wep_enabled || priv->sec_info.wpa_enabled)
  tmp_cap |= WLAN_CAPABILITY_PRIVACY;

 if (IS_SUPPORT_MULTI_BANDS(priv->adapter)) {
  /* Append a channel TLV */
  chan_tlv = (struct mwifiex_ie_types_chan_list_param_set *) pos;
  chan_tlv->header.type = cpu_to_le16(TLV_TYPE_CHANLIST);
  chan_tlv->header.len =
   cpu_to_le16(sizeof(struct mwifiex_chan_scan_param_set));

  memset(chan_tlv->chan_scan_param, 0x00,
         sizeof(struct mwifiex_chan_scan_param_set));
  chan_tlv->chan_scan_param[0].chan_number =
   (bss_desc->phy_param_set.ds_param_set.current_chan);
  mwifiex_dbg(priv->adapter, INFO, "info: ADHOC_J_CMD: TLV Chan=%d\n",
       chan_tlv->chan_scan_param[0].chan_number);

  chan_tlv->chan_scan_param[0].radio_type =
   mwifiex_band_to_radio_type((u8) bss_desc->bss_band);

  mwifiex_dbg(priv->adapter, INFO, "info: ADHOC_J_CMD: TLV Band=%d\n",
       chan_tlv->chan_scan_param[0].radio_type);
  pos += sizeof(chan_tlv->header) +
    sizeof(struct mwifiex_chan_scan_param_set);
  cmd_append_size += sizeof(chan_tlv->header) +
    sizeof(struct mwifiex_chan_scan_param_set);
 }

 if (priv->sec_info.wpa_enabled)
  rsn_ie_len = mwifiex_append_rsn_ie_wpa_wpa2(priv, &pos);
 if (rsn_ie_len == -1)
  return -1;
 cmd_append_size += rsn_ie_len;

 if (ISSUPP_11NENABLED(priv->adapter->fw_cap_info))
  cmd_append_size += mwifiex_cmd_append_11n_tlv(priv,
   bss_desc, &pos);

 /* Append vendor specific IE TLV */
 cmd_append_size += mwifiex_cmd_append_vsie_tlv(priv,
   MWIFIEX_VSIE_MASK_ADHOC, &pos);

 cmd->size = cpu_to_le16
  ((u16) (sizeof(struct host_cmd_ds_802_11_ad_hoc_join)
   + S_DS_GEN + cmd_append_size));

 adhoc_join->bss_descriptor.cap_info_bitmap = cpu_to_le16(tmp_cap);

 return 0;
}

/*
 * This function handles the command response of ad-hoc start and
 * ad-hoc join.
 *
 * The function generates a device-connected event to notify
 * the applications, in case of successful ad-hoc start/join, and
 * saves the beacon buffer.
 */
int mwifiex_ret_802_11_ad_hoc(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_ad_hoc_start_result *start_result =
    &resp->params.start_result;
 struct host_cmd_ds_802_11_ad_hoc_join_result *join_result =
    &resp->params.join_result;
 struct mwifiex_bssdescriptor *bss_desc;
 u16 cmd = le16_to_cpu(resp->command);
 u8 result;

 if (!priv->attempted_bss_desc) {
  mwifiex_dbg(priv->adapter, ERROR,
       "ADHOC_RESP: failed, association terminated by host\n");
  goto done;
 }

 if (cmd == HostCmd_CMD_802_11_AD_HOC_START)
  result = start_result->result;
 else
  result = join_result->result;

 bss_desc = priv->attempted_bss_desc;

 /* Join result code 0 --> SUCCESS */
 if (result) {
  mwifiex_dbg(priv->adapter, ERROR, "ADHOC_RESP: failed\n");
  if (priv->media_connected)
   mwifiex_reset_connect_state(priv, result, true);

  memset(&priv->curr_bss_params.bss_descriptor,
         0x00, sizeof(struct mwifiex_bssdescriptor));

  ret = -1;
  goto done;
 }

 /* Send a Media Connected event, according to the Spec */
 priv->media_connected = true;

 if (le16_to_cpu(resp->command) == HostCmd_CMD_802_11_AD_HOC_START) {
  mwifiex_dbg(priv->adapter, INFO, "info: ADHOC_S_RESP %s\n",
       bss_desc->ssid.ssid);

  /* Update the created network descriptor with the new BSSID */
  memcpy(bss_desc->mac_address,
         start_result->bssid, ETH_ALEN);

  priv->adhoc_state = ADHOC_STARTED;
 } else {
  /*
 * Now the join cmd should be successful.
 * If BSSID has changed use SSID to compare instead of BSSID
 */
  mwifiex_dbg(priv->adapter, INFO,
       "info: ADHOC_J_RESP %s\n",
       bss_desc->ssid.ssid);

  /*
 * Make a copy of current BSSID descriptor, only needed for
 * join since the current descriptor is already being used
 * for adhoc start
 */
  memcpy(&priv->curr_bss_params.bss_descriptor,
         bss_desc, sizeof(struct mwifiex_bssdescriptor));

  priv->adhoc_state = ADHOC_JOINED;
 }

 mwifiex_dbg(priv->adapter, INFO, "info: ADHOC_RESP: channel = %d\n",
      priv->adhoc_channel);
 mwifiex_dbg(priv->adapter, INFO, "info: ADHOC_RESP: BSSID = %pM\n",
      priv->curr_bss_params.bss_descriptor.mac_address);

 if (!netif_carrier_ok(priv->netdev))
  netif_carrier_on(priv->netdev);
 mwifiex_wake_up_net_dev_queue(priv->netdev, adapter);

 mwifiex_save_curr_bcn(priv);

done:
 /* Need to indicate IOCTL complete */
 if (adapter->curr_cmd->wait_q_enabled) {
  if (ret)
   adapter->cmd_wait_q.status = -1;
  else
   adapter->cmd_wait_q.status = 0;

 }

 return ret;
}

/*
 * This function associates to a specific BSS discovered in a scan.
 *
 * It clears any past association response stored for application
 * retrieval and calls the command preparation routine to send the
 * command to firmware.
 */
int mwifiex_associate(struct mwifiex_private *priv,
        struct mwifiex_bssdescriptor *bss_desc)
{
 /* Return error if the adapter is not STA role or table entry
 * is not marked as infra.
 */
 if ((GET_BSS_ROLE(priv) != MWIFIEX_BSS_ROLE_STA) ||
     (bss_desc->bss_mode != NL80211_IFTYPE_STATION))
  return -1;

 if (ISSUPP_11ACENABLED(priv->adapter->fw_cap_info) &&
     !bss_desc->disable_11n && !bss_desc->disable_11ac &&
     priv->adapter->config_bands & BAND_AAC)
  mwifiex_set_11ac_ba_params(priv);
 else
  mwifiex_set_ba_params(priv);

 /* Clear any past association response stored for application
   retrieval */
 priv->assoc_rsp_size = 0;

 return mwifiex_send_cmd(priv, HostCmd_CMD_802_11_ASSOCIATE,
    HostCmd_ACT_GEN_SET, 0, bss_desc, true);
}

/*
 * This function starts an ad-hoc network.
 *
 * It calls the command preparation routine to send the command to firmware.
 */
int
mwifiex_adhoc_start(struct mwifiex_private *priv,
      struct cfg80211_ssid *adhoc_ssid)
{
 mwifiex_dbg(priv->adapter, INFO, "info: Adhoc Channel = %d\n",
      priv->adhoc_channel);
 mwifiex_dbg(priv->adapter, INFO, "info: curr_bss_params.channel = %d\n",
      priv->curr_bss_params.bss_descriptor.channel);
 mwifiex_dbg(priv->adapter, INFO, "info: curr_bss_params.band = %d\n",
      priv->curr_bss_params.band);

 if (ISSUPP_11ACENABLED(priv->adapter->fw_cap_info) &&
     priv->adapter->config_bands & BAND_AAC)
  mwifiex_set_11ac_ba_params(priv);
 else
  mwifiex_set_ba_params(priv);

 return mwifiex_send_cmd(priv, HostCmd_CMD_802_11_AD_HOC_START,
    HostCmd_ACT_GEN_SET, 0, adhoc_ssid, true);
}

/*
 * This function joins an ad-hoc network found in a previous scan.
 *
 * It calls the command preparation routine to send the command to firmware,
 * if already not connected to the requested SSID.
 */
int mwifiex_adhoc_join(struct mwifiex_private *priv,
         struct mwifiex_bssdescriptor *bss_desc)
{
 mwifiex_dbg(priv->adapter, INFO,
      "info: adhoc join: curr_bss ssid =%s\n",
      priv->curr_bss_params.bss_descriptor.ssid.ssid);
 mwifiex_dbg(priv->adapter, INFO,
      "info: adhoc join: curr_bss ssid_len =%u\n",
      priv->curr_bss_params.bss_descriptor.ssid.ssid_len);
 mwifiex_dbg(priv->adapter, INFO, "info: adhoc join: ssid =%s\n",
      bss_desc->ssid.ssid);
 mwifiex_dbg(priv->adapter, INFO, "info: adhoc join: ssid_len =%u\n",
      bss_desc->ssid.ssid_len);

 /* Check if the requested SSID is already joined */
 if (priv->curr_bss_params.bss_descriptor.ssid.ssid_len &&
     cfg80211_ssid_eq(&bss_desc->ssid,
        &priv->curr_bss_params.bss_descriptor.ssid) &&
     (priv->curr_bss_params.bss_descriptor.bss_mode ==
       NL80211_IFTYPE_ADHOC)) {
  mwifiex_dbg(priv->adapter, INFO,
       "info: ADHOC_J_CMD: new ad-hoc SSID\t"
       "is the same as current; not attempting to re-join\n");
  return -1;
 }

 if (ISSUPP_11ACENABLED(priv->adapter->fw_cap_info) &&
     !bss_desc->disable_11n && !bss_desc->disable_11ac &&
     priv->adapter->config_bands & BAND_AAC)
  mwifiex_set_11ac_ba_params(priv);
 else
  mwifiex_set_ba_params(priv);

 mwifiex_dbg(priv->adapter, INFO,
      "info: curr_bss_params.channel = %d\n",
      priv->curr_bss_params.bss_descriptor.channel);
 mwifiex_dbg(priv->adapter, INFO,
      "info: curr_bss_params.band = %c\n",
      priv->curr_bss_params.band);

 return mwifiex_send_cmd(priv, HostCmd_CMD_802_11_AD_HOC_JOIN,
    HostCmd_ACT_GEN_SET, 0, bss_desc, true);
}

/*
 * This function deauthenticates/disconnects from infra network by sending
 * deauthentication request.
 */
static int mwifiex_deauthenticate_infra(struct mwifiex_private *priv, u8 *mac)
{
 u8 mac_address[ETH_ALEN];
 int ret;

 if (!mac || is_zero_ether_addr(mac))
  memcpy(mac_address,
         priv->curr_bss_params.bss_descriptor.mac_address,
         ETH_ALEN);
 else
  memcpy(mac_address, mac, ETH_ALEN);

 ret = mwifiex_send_cmd(priv, HostCmd_CMD_802_11_DEAUTHENTICATE,
          HostCmd_ACT_GEN_SET, 0, mac_address, true);

 return ret;
}

/*
 * This function deauthenticates/disconnects from a BSS.
 *
 * In case of infra made, it sends deauthentication request, and
 * in case of ad-hoc mode, a stop network request is sent to the firmware.
 * In AP mode, a command to stop bss is sent to firmware.
 */
int mwifiex_deauthenticate(struct mwifiex_private *priv, u8 *mac)
{
 int ret = 0;

 if (!priv->media_connected)
  return 0;

 if (priv->adapter->host_mlme_enabled) {
  priv->auth_flag = 0;
  priv->auth_alg = WLAN_AUTH_NONE;
  priv->host_mlme_reg = false;
  priv->mgmt_frame_mask = 0;
  if (mwifiex_send_cmd(priv, HostCmd_CMD_MGMT_FRAME_REG,
         HostCmd_ACT_GEN_SET, 0,
         &priv->mgmt_frame_mask, false)) {
   mwifiex_dbg(priv->adapter, ERROR,
        "could not unregister mgmt frame rx\n");
   return -1;
  }
 }

 switch (priv->bss_mode) {
 case NL80211_IFTYPE_STATION:
 case NL80211_IFTYPE_P2P_CLIENT:
  ret = mwifiex_deauthenticate_infra(priv, mac);
  if (ret)
   cfg80211_disconnected(priv->netdev, 0, NULL, 0,
           true, GFP_KERNEL);
  break;
 case NL80211_IFTYPE_ADHOC:
  return mwifiex_send_cmd(priv, HostCmd_CMD_802_11_AD_HOC_STOP,
     HostCmd_ACT_GEN_SET, 0, NULL, true);
 case NL80211_IFTYPE_AP:
  return mwifiex_send_cmd(priv, HostCmd_CMD_UAP_BSS_STOP,
     HostCmd_ACT_GEN_SET, 0, NULL, true);
 default:
  break;
 }

 return ret;
}

/* This function deauthenticates/disconnects from all BSS. */
void mwifiex_deauthenticate_all(struct mwifiex_adapter *adapter)
{
 struct mwifiex_private *priv;
 int i;

 for (i = 0; i < adapter->priv_num; i++) {
  priv = adapter->priv[i];
  mwifiex_deauthenticate(priv, NULL);
 }
}
EXPORT_SYMBOL_GPL(mwifiex_deauthenticate_all);

/*
 * This function converts band to radio type used in channel TLV.
 */
u8
mwifiex_band_to_radio_type(u8 band)
{
 switch (band) {
 case BAND_A:
 case BAND_AN:
 case BAND_A | BAND_AN:
 case BAND_A | BAND_AN | BAND_AAC:
  return HostCmd_SCAN_RADIO_TYPE_A;
 case BAND_B:
 case BAND_G:
 case BAND_B | BAND_G:
 default:
  return HostCmd_SCAN_RADIO_TYPE_BG;
 }
}