drivers/net/wireless/libertas/scan.h

   1 /**
   2   * Interface for the wlan network scan routines
   3   *
   4   * Driver interface functions and type declarations for the scan module
   5   *   implemented in wlan_scan.c.
   6   */
   7 #ifndef _WLAN_SCAN_H
   8 #define _WLAN_SCAN_H
   9
  10 #include <net/ieee80211.h>
  11 #include "hostcmd.h"
  12
  13 /**
  14  *  @brief Maximum number of channels that can be sent in a setuserscan ioctl
  15  *
  16  *  @sa wlan_ioctl_user_scan_cfg
  17  */
  18 #define WLAN_IOCTL_USER_SCAN_CHAN_MAX  50
  19
  20 //! Infrastructure BSS scan type in wlan_scan_cmd_config
  21 #define WLAN_SCAN_BSS_TYPE_BSS         1
  22
  23 //! Adhoc BSS scan type in wlan_scan_cmd_config
  24 #define WLAN_SCAN_BSS_TYPE_IBSS        2
  25
  26 //! Adhoc or Infrastructure BSS scan type in wlan_scan_cmd_config, no filter
  27 #define WLAN_SCAN_BSS_TYPE_ANY         3
  28
  29 /**
  30  * @brief Structure used internally in the wlan driver to configure a scan.
  31  *
  32  * Sent to the command processing module to configure the firmware
  33  *   scan command prepared by libertas_cmd_80211_scan.
  34  *
  35  * @sa wlan_scan_networks
  36  *
  37  */
  38 struct wlan_scan_cmd_config {
  39     /**
  40      *  @brief BSS type to be sent in the firmware command
  41      *
  42      *  Field can be used to restrict the types of networks returned in the
  43      *    scan.  valid settings are:
  44      *
  45      *   - WLAN_SCAN_BSS_TYPE_BSS  (infrastructure)
  46      *   - WLAN_SCAN_BSS_TYPE_IBSS (adhoc)
  47      *   - WLAN_SCAN_BSS_TYPE_ANY  (unrestricted, adhoc and infrastructure)
  48      */
  49         u8 bsstype;
  50
  51     /**
  52      *  @brief Specific BSSID used to filter scan results in the firmware
  53      */
  54         u8 bssid[ETH_ALEN];
  55
  56     /**
  57      *  @brief length of TLVs sent in command starting at tlvBuffer
  58      */
  59         int tlvbufferlen;
  60
  61     /**
  62      *  @brief SSID TLV(s) and ChanList TLVs to be sent in the firmware command
  63      *
  64      *  @sa TLV_TYPE_CHANLIST, mrvlietypes_chanlistparamset_t
  65      *  @sa TLV_TYPE_SSID, mrvlietypes_ssidparamset_t
  66      */
  67         u8 tlvbuffer[1];        //!< SSID TLV(s) and ChanList TLVs are stored here
  68 };
  69
  70 /**
  71  *  @brief IOCTL channel sub-structure sent in wlan_ioctl_user_scan_cfg
  72  *
  73  *  Multiple instances of this structure are included in the IOCTL command
  74  *   to configure a instance of a scan on the specific channel.
  75  */
  76 struct wlan_ioctl_user_scan_chan {
  77         u8 channumber;          //!< channel Number to scan
  78         u8 radiotype;           //!< Radio type: 'B/G' band = 0, 'A' band = 1
  79         u8 scantype;            //!< Scan type: Active = 0, Passive = 1
  80         u16 scantime;           //!< Scan duration in milliseconds; if 0 default used
  81 };
  82
  83 /**
  84  *  @brief IOCTL input structure to configure an immediate scan cmd to firmware
  85  *
  86  *  Used in the setuserscan (WLAN_SET_USER_SCAN) private ioctl.  Specifies
  87  *   a number of parameters to be used in general for the scan as well
  88  *   as a channel list (wlan_ioctl_user_scan_chan) for each scan period
  89  *   desired.
  90  *
  91  *  @sa libertas_set_user_scan_ioctl
  92  */
  93 struct wlan_ioctl_user_scan_cfg {
  94     /**
  95      *  @brief BSS type to be sent in the firmware command
  96      *
  97      *  Field can be used to restrict the types of networks returned in the
  98      *    scan.  valid settings are:
  99      *
 100      *   - WLAN_SCAN_BSS_TYPE_BSS  (infrastructure)
 101      *   - WLAN_SCAN_BSS_TYPE_IBSS (adhoc)
 102      *   - WLAN_SCAN_BSS_TYPE_ANY  (unrestricted, adhoc and infrastructure)
 103      */
 104         u8 bsstype;
 105
 106     /**
 107      *  @brief Configure the number of probe requests for active chan scans
 108      */
 109         u8 numprobes;
 110
 111         /**
 112          *  @brief BSSID filter sent in the firmware command to limit the results
 113          */
 114         u8 bssid[ETH_ALEN];
 115
 116         /* Clear existing scan results matching this BSSID */
 117         u8 clear_bssid;
 118
 119         /**
 120          *  @brief SSID filter sent in the firmware command to limit the results
 121          */
 122         char ssid[IW_ESSID_MAX_SIZE];
 123         u8 ssid_len;
 124
 125         /* Clear existing scan results matching this SSID */
 126         u8 clear_ssid;
 127
 128     /**
 129      *  @brief Variable number (fixed maximum) of channels to scan up
 130      */
 131         struct wlan_ioctl_user_scan_chan chanlist[WLAN_IOCTL_USER_SCAN_CHAN_MAX];
 132 };
 133
 134 /**
 135  *  @brief Structure used to store information for each beacon/probe response
 136  */
 137 struct bss_descriptor {
 138         u8 bssid[ETH_ALEN];
 139
 140         struct WLAN_802_11_SSID ssid;
 141
 142         /* WEP encryption requirement */
 143         u32 privacy;
 144
 145         /* receive signal strength in dBm */
 146         long rssi;
 147
 148         u32 channel;
 149
 150         u16 beaconperiod;
 151
 152         u32 atimwindow;
 153
 154         u8 mode;
 155         u8 libertas_supported_rates[WLAN_SUPPORTED_RATES];
 156
 157         __le64 timestamp;       //!< TSF value included in the beacon/probe response
 158         unsigned long last_scanned;
 159
 160         union ieeetypes_phyparamset phyparamset;
 161         union IEEEtypes_ssparamset ssparamset;
 162         struct ieeetypes_capinfo cap;
 163         u8 datarates[WLAN_SUPPORTED_RATES];
 164
 165         u64 networktsf;         //!< TSF timestamp from the current firmware TSF
 166
 167         struct ieeetypes_countryinfofullset countryinfo;
 168
 169         u8 wpa_ie[MAX_WPA_IE_LEN];
 170         size_t wpa_ie_len;
 171         u8 rsn_ie[MAX_WPA_IE_LEN];
 172         size_t rsn_ie_len;
 173
 174         struct list_head list;
 175 };
 176
 177 extern int libertas_SSID_cmp(struct WLAN_802_11_SSID *ssid1,
 178                         struct WLAN_802_11_SSID *ssid2);
 179
 180 struct bss_descriptor * libertas_find_SSID_in_list(wlan_adapter * adapter,
 181                         struct WLAN_802_11_SSID *ssid, u8 * bssid, u8 mode,
 182                         int channel);
 183
 184 struct bss_descriptor * libertas_find_best_SSID_in_list(wlan_adapter * adapter,
 185                         u8 mode);
 186
 187 extern struct bss_descriptor * libertas_find_BSSID_in_list(wlan_adapter * adapter,
 188                         u8 * bssid, u8 mode);
 189
 190 int libertas_find_best_network_SSID(wlan_private * priv,
 191                         struct WLAN_802_11_SSID *pSSID,
 192                         u8 preferred_mode, u8 *out_mode);
 193
 194 extern int libertas_send_specific_SSID_scan(wlan_private * priv,
 195                                 struct WLAN_802_11_SSID *prequestedssid,
 196                                 u8 clear_ssid);
 197 extern int libertas_send_specific_BSSID_scan(wlan_private * priv,
 198                                  u8 * bssid, u8 clear_bssid);
 199
 200 extern int libertas_cmd_80211_scan(wlan_private * priv,
 201                                 struct cmd_ds_command *cmd,
 202                                 void *pdata_buf);
 203
 204 extern int libertas_ret_80211_scan(wlan_private * priv,
 205                                 struct cmd_ds_command *resp);
 206
 207 int wlan_scan_networks(wlan_private * priv,
 208                 const struct wlan_ioctl_user_scan_cfg * puserscanin,
 209                 int full_scan);
 210
 211 struct ifreq;
 212
 213 struct iw_point;
 214 struct iw_param;
 215 struct iw_request_info;
 216 extern int libertas_get_scan(struct net_device *dev, struct iw_request_info *info,
 217                          struct iw_point *dwrq, char *extra);
 218 extern int libertas_set_scan(struct net_device *dev, struct iw_request_info *info,
 219                          struct iw_param *vwrq, char *extra);
 220
 221 #endif                          /* _WLAN_SCAN_H */