// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at

//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/*
 * All the APIs declared here are internal only APIs, it can only be used by 
 * espressif internal modules, such as SSC, LWIP, TCPIP adapter etc, espressif 
 * customers are not recommended to use them.
 *
 * If someone really want to use specified APIs declared in here, please contact
 * espressif AE/developer to make sure you know the limitations or risk of 
 * the API, otherwise you may get unexpected behavior!!!
 *
 */


#ifndef __ESP_WIFI_INTERNAL_H__
#define __ESP_WIFI_INTERNAL_H__

#include <stdint.h>
#include <stdbool.h>
#include "freertos/FreeRTOS.h"
#include "freertos/queue.h"
#include "sys/queue.h"
#include "esp_err.h"
#include "esp_wifi_types.h"
#include "esp_event.h"
#include "esp_wifi.h"
#include "esp_smartconfig.h"
#include "wifi_types.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    QueueHandle_t handle; /**< FreeRTOS queue handler */
    void *storage;        /**< storage for FreeRTOS queue */
} wifi_static_queue_t;

/**
  * @brief WiFi log level
  *
  */
typedef enum {
    WIFI_LOG_NONE = 0,
    WIFI_LOG_ERROR ,      /*enabled by default*/
    WIFI_LOG_WARNING,     /*enabled by default*/
    WIFI_LOG_INFO,        /*enabled by default*/
    WIFI_LOG_DEBUG,       /*can be set in menuconfig*/
    WIFI_LOG_VERBOSE,     /*can be set in menuconfig*/
} wifi_log_level_t;
  
/**
  * @brief WiFi log module definition
  *
  */
typedef enum {
    WIFI_LOG_MODULE_ALL  = 0, /*all log modules */
    WIFI_LOG_MODULE_WIFI, /*logs related to WiFi*/
    WIFI_LOG_MODULE_COEX, /*logs related to WiFi and BT(or BLE) coexist*/
    WIFI_LOG_MODULE_MESH, /*logs related to Mesh*/
} wifi_log_module_t;

/**
  * @brief WiFi log submodule definition
  *
  */
#define WIFI_LOG_SUBMODULE_ALL   (0)    /*all log submodules*/
#define WIFI_LOG_SUBMODULE_INIT  (1)    /*logs related to initialization*/
#define WIFI_LOG_SUBMODULE_IOCTL (1<<1) /*logs related to API calling*/
#define WIFI_LOG_SUBMODULE_CONN  (1<<2) /*logs related to connecting*/
#define WIFI_LOG_SUBMODULE_SCAN  (1<<3) /*logs related to scaning*/


/**
 * @brief Initialize Wi-Fi Driver
 *     Alloc resource for WiFi driver, such as WiFi control structure, RX/TX buffer,
 *     WiFi NVS structure among others.
 *
 * For the most part, you need not call this function directly. It gets called
 * from esp_wifi_init().
 *
 * This function may be called, if you only need to initialize the Wi-Fi driver
 * without having to use the network stack on top.
 *
 * @param  config provide WiFi init configuration
 *
 * @return
 *    - ESP_OK: succeed
 *    - ESP_ERR_NO_MEM: out of memory
 *    - others: refer to error code esp_err.h
 */
esp_err_t esp_wifi_init_internal(const wifi_init_config_t *config);

/**
 * @brief Deinitialize Wi-Fi Driver
 *     Free resource for WiFi driver, such as WiFi control structure, RX/TX buffer,
 *     WiFi NVS structure among others.
 *
 * For the most part, you need not call this function directly. It gets called
 * from esp_wifi_deinit().
 *
 * This function may be called, if you call esp_wifi_init_internal to initialize
 * WiFi driver.
 *
 * @return
 *    - ESP_OK: succeed
 *    - others: refer to error code esp_err.h
 */
esp_err_t esp_wifi_deinit_internal(void);

/**
  * @brief  free the rx buffer which allocated by wifi driver
  *
  * @param  void* buffer: rx buffer pointer
  */
void esp_wifi_internal_free_rx_buffer(void* buffer);

/**
  * @brief  transmit the buffer via wifi driver
  *
  * This API makes a copy of the input buffer and then forwards the buffer
  * copy to WiFi driver.
  *
  * @param  wifi_interface_t wifi_if : wifi interface id
  * @param  void *buffer : the buffer to be tansmit
  * @param  uint16_t len : the length of buffer
  *
  * @return
  *    - ESP_OK  : Successfully transmit the buffer to wifi driver
  *    - ESP_ERR_NO_MEM: out of memory
  *    - ESP_ERR_WIFI_ARG: invalid argument
  *    - ESP_ERR_WIFI_IF : WiFi interface is invalid
  *    - ESP_ERR_WIFI_CONN : WiFi interface is not created, e.g. send the data to STA while WiFi mode is AP mode
  *    - ESP_ERR_WIFI_NOT_STARTED : WiFi is not started
  *    - ESP_ERR_WIFI_STATE : WiFi internal state is not ready, e.g. WiFi is not started
  *    - ESP_ERR_WIFI_NOT_ASSOC : WiFi is not associated
  *    - ESP_ERR_WIFI_TX_DISALLOW : WiFi TX is disallowed, e.g. WiFi hasn't pass the authentication 
  *    - ESP_ERR_WIFI_POST : caller fails to post event to WiFi task
  */
int esp_wifi_internal_tx(wifi_interface_t wifi_if, void *buffer, uint16_t len);

/**
  * @brief     The net stack buffer reference counter callback function
  *
  */
typedef void (*wifi_netstack_buf_ref_cb_t)(void *netstack_buf);

/**
  * @brief     The net stack buffer free callback function
  *
  */
typedef void (*wifi_netstack_buf_free_cb_t)(void *netstack_buf);

/**
  * @brief  transmit the buffer by reference via wifi driver
  *
  * This API firstly increases the reference counter of the input buffer and
  * then forwards the buffer to WiFi driver. The WiFi driver will free the buffer
  * after processing it. Use esp_wifi_internal_tx() if the uplayer buffer doesn't
  * supports reference counter.
  * 
  * @param  wifi_if : wifi interface id
  * @param  buffer : the buffer to be tansmit
  * @param  len : the length of buffer
  * @param  netstack_buf : the netstack buffer related to bufffer
  *
  * @return
  *    - ESP_OK  : Successfully transmit the buffer to wifi driver
  *    - ESP_ERR_NO_MEM: out of memory
  *    - ESP_ERR_WIFI_ARG: invalid argument
  *    - ESP_ERR_WIFI_IF : WiFi interface is invalid
  *    - ESP_ERR_WIFI_CONN : WiFi interface is not created, e.g. send the data to STA while WiFi mode is AP mode
  *    - ESP_ERR_WIFI_NOT_STARTED : WiFi is not started
  *    - ESP_ERR_WIFI_STATE : WiFi internal state is not ready, e.g. WiFi is not started
  *    - ESP_ERR_WIFI_NOT_ASSOC : WiFi is not associated
  *    - ESP_ERR_WIFI_TX_DISALLOW : WiFi TX is disallowed, e.g. WiFi hasn't pass the authentication 
  *    - ESP_ERR_WIFI_POST : caller fails to post event to WiFi task
  */
esp_err_t esp_wifi_internal_tx_by_ref(wifi_interface_t ifx, void *buffer, size_t len, void *netstack_buf);

/**
  * @brief  register the net stack buffer reference increasing and free callback
  *
  * @param  ref : net stack buffer reference callback
  * @param  free: net stack buffer free callback
  *
  * @return
  *    - ESP_OK  : Successfully transmit the buffer to wifi driver
  *    - others  : failed to register the callback
  */
esp_err_t esp_wifi_internal_reg_netstack_buf_cb(wifi_netstack_buf_ref_cb_t ref, wifi_netstack_buf_free_cb_t free);


/**
  * @brief     The WiFi RX callback function
  *
  *            Each time the WiFi need to forward the packets to high layer, the callback function will be called
  */
typedef esp_err_t (*wifi_rxcb_t)(void *buffer, uint16_t len, void *eb);

/**
  * @brief     Set the WiFi RX callback
  *
  * @attention 1. Currently we support only one RX callback for each interface
  *
  * @param     wifi_interface_t ifx : interface
  * @param     wifi_rxcb_t fn : WiFi RX callback
  *
  * @return
  *     - ESP_OK : succeed
  *     - others : fail
  */
esp_err_t esp_wifi_internal_reg_rxcb(wifi_interface_t ifx, wifi_rxcb_t fn);

/**
  * @brief     Notify WIFI driver that the station got ip successfully
  *
  * @return
  *     - ESP_OK : succeed
  *     - others : fail
  */
esp_err_t esp_wifi_internal_set_sta_ip(void);

/**
  * @brief  enable or disable transmitting WiFi MAC frame with fixed rate
  *
  * @attention 1. If fixed rate is enabled, both management and data frame are transmitted with fixed rate
  * @attention 2. Make sure that the receiver is able to receive the frame with the fixed rate if you want the frame to be received
  *
  * @param  ifx : wifi interface
  * @param  en : false - disable, true - enable
  * @param  rate : PHY rate
  *
  * @return
  *    - ERR_OK  : succeed
  *    - ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
  *    - ESP_ERR_WIFI_NOT_STARTED: WiFi was not started by esp_wifi_start
  *    - ESP_ERR_WIFI_IF : invalid WiFi interface
  *    - ESP_ERR_INVALID_ARG : invalid rate
  *    - ESP_ERR_NOT_SUPPORTED : do not support to set fixed rate if TX AMPDU is enabled
  */
esp_err_t esp_wifi_internal_set_fix_rate(wifi_interface_t ifx, bool en, wifi_phy_rate_t rate);

/**
  * @brief     Start SmartConfig, config ESP device to connect AP. You need to broadcast information by phone APP.
  *            Device sniffer special packets from the air that containing SSID and password of target AP.
  *
  * @attention 1. This API can be called in station or softAP-station mode.
  * @attention 2. Can not call esp_smartconfig_start twice before it finish, please call
  *               esp_smartconfig_stop first.
  *
  * @param     config pointer to smartconfig start configure structure
  *
  * @return
  *     - ESP_OK: succeed
  *     - others: fail
  */
esp_err_t esp_smartconfig_internal_start(const smartconfig_start_config_t *config);

/**
  * @brief     Stop SmartConfig, free the buffer taken by esp_smartconfig_start.
  *
  * @attention Whether connect to AP succeed or not, this API should be called to free
  *            memory taken by smartconfig_start.
  *
  * @return
  *     - ESP_OK: succeed
  *     - others: fail
  */
esp_err_t esp_smartconfig_internal_stop(void);

/**
  * @brief     Check the MD5 values of the OS adapter header files in IDF and WiFi library
  *
  * @attention 1. It is used for internal CI version check
  *
  * @return
  *     - ESP_OK : succeed
  *     - ESP_WIFI_INVALID_ARG : MD5 check fail
  */
esp_err_t esp_wifi_internal_osi_funcs_md5_check(const char *md5);

/**
  * @brief     Check the MD5 values of the crypto types header files in IDF and WiFi library
  *
  * @attention 1. It is used for internal CI version check
  *
  * @return
  *     - ESP_OK : succeed
  *     - ESP_WIFI_INVALID_ARG : MD5 check fail
  */
esp_err_t esp_wifi_internal_crypto_funcs_md5_check(const char *md5);

/**
  * @brief     Check the MD5 values of the esp_wifi_types.h in IDF and WiFi library
  *
  * @attention 1. It is used for internal CI version check
  *
  * @return
  *     - ESP_OK : succeed
  *     - ESP_WIFI_INVALID_ARG : MD5 check fail
  */
esp_err_t esp_wifi_internal_wifi_type_md5_check(const char *md5);

/**
  * @brief     Check the MD5 values of the esp_wifi.h in IDF and WiFi library
  *
  * @attention 1. It is used for internal CI version check
  *
  * @return
  *     - ESP_OK : succeed
  *     - ESP_WIFI_INVALID_ARG : MD5 check fail
  */
esp_err_t esp_wifi_internal_esp_wifi_md5_check(const char *md5);

/**
  * @brief     Allocate a chunk of memory for WiFi driver
  *
  * @attention This API is not used for DMA memory allocation.
  *
  * @param     size_t size : Size, in bytes, of the amount of memory to allocate
  *
  * @return    A pointer to the memory allocated on success, NULL on failure
  */
void *wifi_malloc( size_t size );

/**
  * @brief     Reallocate a chunk of memory for WiFi driver
  *
  * @attention This API is not used for DMA memory allocation.
  *
  * @param     void * ptr  : Pointer to previously allocated memory, or NULL for a new allocation.
  * @param     size_t size : Size, in bytes, of the amount of memory to allocate
  *
  * @return    A pointer to the memory allocated on success, NULL on failure
  */
void *wifi_realloc( void *ptr, size_t size );

/**
  * @brief     Callocate memory for WiFi driver
  *
  * @attention This API is not used for DMA memory allocation.
  *
  * @param     size_t n    : Number of continuing chunks of memory to allocate
  * @param     size_t size : Size, in bytes, of the amount of memory to allocate
  *
  * @return    A pointer to the memory allocated on success, NULL on failure
  */
void *wifi_calloc( size_t n, size_t size );

/**
  * @brief     Update WiFi MAC time
  *
  * @param     uint32_t time_delta : time duration since the WiFi/BT common clock is disabled
  *
  * @return    Always returns ESP_OK
  */
typedef esp_err_t (* wifi_mac_time_update_cb_t)( uint32_t time_delta );

/**
  * @brief     Update WiFi MAC time
  *
  * @param     uint32_t time_delta : time duration since the WiFi/BT common clock is disabled
  *
  * @return    Always returns ESP_OK
  */
esp_err_t esp_wifi_internal_update_mac_time( uint32_t time_delta );

/**
  * @brief     Set current WiFi log level     
  *
  * @param     level   Log level.
  *
  * @return
  *    - ESP_OK: succeed
  *    - ESP_FAIL: level is invalid
  */
esp_err_t esp_wifi_internal_set_log_level(wifi_log_level_t level);

/**
  * @brief     Set current log module and submodule
  *
  * @param     module      Log module
  * @param     submodule   Log submodule
  * @param     enable      enable or disable
  *            If module == 0 && enable == 0, all log modules are disabled.
  *            If module == 0 && enable == 1, all log modules are enabled.
  *            If submodule == 0 && enable == 0, all log submodules are disabled.
  *            If submodule == 0 && enable == 1, all log submodules are enabled.
  *
  * @return
  *    - ESP_OK: succeed
  *    - ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
  *    - ESP_ERR_WIFI_ARG: invalid argument
  */
esp_err_t esp_wifi_internal_set_log_mod(wifi_log_module_t module, uint32_t submodule, bool enable);

/**
  * @brief     Get current WiFi log info     
  *
  * @param     log_level  the return log level.
  * @param     log_mod    the return log module and submodule
  *
  * @return
  *    - ESP_OK: succeed
  */
esp_err_t esp_wifi_internal_get_log(wifi_log_level_t *log_level, uint32_t *log_mod);

/**
  * @brief     A general API to set/get WiFi internal configuration, it's for debug only
  *
  * @param     cmd : ioctl command type
  * @param     cfg : configuration for the command
  *
  * @return    
  *    - ESP_OK: succeed
  *    - others: failed
  */
esp_err_t esp_wifi_internal_ioctl(int cmd, wifi_ioctl_config_t *cfg);

/**
  * @brief     Get the user-configured channel info 
  *
  * @param     ifx : WiFi interface 
  * @param     primary : store the configured primary channel 
  * @param     second : store the configured second channel
  *
  * @return    
  *    - ESP_OK: succeed
  */
esp_err_t esp_wifi_internal_get_config_channel(wifi_interface_t ifx, uint8_t *primary, uint8_t *second);

/**
  * @brief     Get the negotiated channel info after WiFi connection established 
  *
  * @param     ifx : WiFi interface 
  * @param     aid : the connection number when a STA connects to the softAP    
  * @param     primary : store the negotiated primary channel 
  * @param     second : store the negotiated second channel
  * @attention the aid param is only works when the ESP32 in softAP/softAP+STA mode 
  *
  * @return    
  *    - ESP_OK: succeed
  */
esp_err_t esp_wifi_internal_get_negotiated_channel(wifi_interface_t ifx, uint8_t aid, uint8_t *primary, uint8_t *second);

/**
  * @brief     Get the negotiated bandwidth info after WiFi connection established 
  *
  * @param     ifx : WiFi interface 
  * @param     bw : store the negotiated bandwidth 
  *
  * @return    
  *    - ESP_OK: succeed
  */
esp_err_t esp_wifi_internal_get_negotiated_bandwidth(wifi_interface_t ifx, uint8_t aid, uint8_t *bw);

#if CONFIG_IDF_TARGET_ESP32S2
/**
  * @brief     Check if WiFi TSF is active 
  *
  * @return    
  *    - true: Active 
  *    - false: Not active 
  */
bool esp_wifi_internal_is_tsf_active(void);
#endif

#ifdef __cplusplus
}
#endif

#endif /* __ESP_WIFI_H__ */