common.h

#include "wifi_hal.h"

#ifndef __WIFI_HAL_COMMON_H__
#define __WIFI_HAL_COMMON_H__

#define LOG_TAG  "WifiHAL"

#include <utils/Log.h>
#include "nl80211_copy.h"
#include "sync.h"

#define SOCKET_BUFFER_SIZE      (32768U)
#define RECV_BUF_SIZE           (4096)
#define DEFAULT_EVENT_CB_SIZE   (64)
#define DEFAULT_CMD_SIZE        (64)
#define DOT11_OUI_LEN             3

/*
 Vendor OUI - This is a unique identifier that identifies organization. Lets
 code Android specific functions with Google OUI; although vendors can do more
 with their own OUI's as well.
 */

const uint32_t GOOGLE_OUI = 0x001A11;
/* TODO: define vendor OUI here */


/*
 This enum defines ranges for various commands; commands themselves
 can be defined in respective feature headers; i.e. find gscan command
 definitions in gscan.cpp
 */

typedef enum {
    /* don't use 0 as a valid subcommand */
    VENDOR_NL80211_SUBCMD_UNSPECIFIED,

    /* define all vendor startup commands between 0x0 and 0x0FFF */
    VENDOR_NL80211_SUBCMD_RANGE_START = 0x0001,
    VENDOR_NL80211_SUBCMD_RANGE_END   = 0x0FFF,

    /* define all GScan related commands between 0x1000 and 0x10FF */
    ANDROID_NL80211_SUBCMD_GSCAN_RANGE_START = 0x1000,
    ANDROID_NL80211_SUBCMD_GSCAN_RANGE_END   = 0x10FF,

    /* define all NearbyDiscovery related commands between 0x1100 and 0x11FF */
    ANDROID_NL80211_SUBCMD_NBD_RANGE_START = 0x1100,
    ANDROID_NL80211_SUBCMD_NBD_RANGE_END   = 0x11FF,

    /* define all RTT related commands between 0x1100 and 0x11FF */
    ANDROID_NL80211_SUBCMD_RTT_RANGE_START = 0x1100,
    ANDROID_NL80211_SUBCMD_RTT_RANGE_END   = 0x11FF,

    ANDROID_NL80211_SUBCMD_LSTATS_RANGE_START = 0x1200,
    ANDROID_NL80211_SUBCMD_LSTATS_RANGE_END   = 0x12FF,

    /* This is reserved for future usage */

} ANDROID_VENDOR_SUB_COMMAND;

typedef enum {
    SLSI_NL80211_VENDOR_SUBCMD_GET_CAPABILITIES = ANDROID_NL80211_SUBCMD_GSCAN_RANGE_START,
    SLSI_NL80211_VENDOR_SUBCMD_GET_VALID_CHANNELS,
    SLSI_NL80211_VENDOR_SUBCMD_ADD_GSCAN,
    SLSI_NL80211_VENDOR_SUBCMD_DEL_GSCAN,
    SLSI_NL80211_VENDOR_SUBCMD_GET_SCAN_RESULTS,
    SLSI_NL80211_VENDOR_SUBCMD_SET_BSSID_HOTLIST,
    SLSI_NL80211_VENDOR_SUBCMD_RESET_BSSID_HOTLIST,
    SLSI_NL80211_VENDOR_SUBCMD_GET_HOTLIST_RESULTS,
    SLSI_NL80211_VENDOR_SUBCMD_SET_SIGNIFICANT_CHANGE,
    SLSI_NL80211_VENDOR_SUBCMD_RESET_SIGNIFICANT_CHANGE,
    SLSI_NL80211_VENDOR_SUBCMD_SET_GSCAN_OUI,
    SLSI_NL80211_VENDOR_SUBCMD_SET_NODFS
} WIFI_SUB_COMMAND;

typedef enum {
    GSCAN_EVENT_SIGNIFICANT_CHANGE_RESULTS ,
    GSCAN_EVENT_HOTLIST_RESULTS_FOUND,
    GSCAN_EVENT_SCAN_RESULTS_AVAILABLE,
    GSCAN_EVENT_FULL_SCAN_RESULTS,
    GSCAN_EVENT_COMPLETE_SCAN,
    GSCAN_EVENT_HOTLIST_RESULTS_LOST
} WIFI_EVENT;

typedef void (*wifi_internal_event_handler) (wifi_handle handle, int events);

class WifiCommand;

typedef struct {
    int nl_cmd;
    uint32_t vendor_id;
    int vendor_subcmd;
    nl_recvmsg_msg_cb_t cb_func;
    void *cb_arg;
} cb_info;

typedef struct {
    wifi_request_id id;
    WifiCommand *cmd;
} cmd_info;

typedef struct {
    wifi_handle handle;                             // handle to wifi data
    char name[8+1];                                 // interface name + trailing null
    int  id;                                        // id to use when talking to driver
} interface_info;

typedef struct {

    struct nl_sock *cmd_sock;                       // command socket object
    struct nl_sock *event_sock;                     // event socket object
    int nl80211_family_id;                          // family id for 80211 driver
    int cleanup_socks[2];                           // sockets used to implement wifi_cleanup

    bool in_event_loop;                             // Indicates that event loop is active
    bool clean_up;                                  // Indication to clean up the socket

    wifi_internal_event_handler event_handler;      // default event handler
    wifi_cleaned_up_handler cleaned_up_handler;     // socket cleaned up handler

    cb_info *event_cb;                              // event callbacks
    int num_event_cb;                               // number of event callbacks
    int alloc_event_cb;                             // number of allocated callback objects
    pthread_mutex_t cb_lock;                        // mutex for the event_cb access

    cmd_info *cmd;                                  // Outstanding commands
    int num_cmd;                                    // number of commands
    int alloc_cmd;                                  // number of commands allocated

    interface_info **interfaces;                    // array of interfaces
    int num_interfaces;                             // number of interfaces


    // add other details
} hal_info;

wifi_error wifi_register_handler(wifi_handle handle, int cmd, nl_recvmsg_msg_cb_t func, void *arg);
wifi_error wifi_register_vendor_handler(wifi_handle handle,
            uint32_t id, int subcmd, nl_recvmsg_msg_cb_t func, void *arg);

void wifi_unregister_handler(wifi_handle handle, int cmd);
void wifi_unregister_vendor_handler(wifi_handle handle, uint32_t id, int subcmd);

wifi_error wifi_register_cmd(wifi_handle handle, int id, WifiCommand *cmd);
WifiCommand *wifi_unregister_cmd(wifi_handle handle, int id);
WifiCommand *wifi_get_cmd(wifi_handle handle, int id);
void wifi_unregister_cmd(wifi_handle handle, WifiCommand *cmd);

interface_info *getIfaceInfo(wifi_interface_handle);
wifi_handle getWifiHandle(wifi_interface_handle handle);
hal_info *getHalInfo(wifi_handle handle);
hal_info *getHalInfo(wifi_interface_handle handle);
wifi_handle getWifiHandle(hal_info *info);
wifi_interface_handle getIfaceHandle(interface_info *info);


// some common macros

#define min(x, y)       ((x) < (y) ? (x) : (y))
#define max(x, y)       ((x) > (y) ? (x) : (y))

#endif