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OVMS3-idf/components/esp32/include/esp_wifi.h
Liu Zhi Fu e0f49c2221 esp32: add esp_wifi_sta_get_ap_info 
The customers need to get information about AP that associated with ESP32 station,
these information includes RSSI, channel number etc, so add this new API
2016-10-27 10:42:01 +08:00

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// 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.
/* Notes about WiFi Programming
*
* The esp32 WiFi programming model can be depicted as following picture:
*
*
* default handler user handler
* ------------- --------------- ---------------
* | | event | | callback or | |
* | tcpip | ---------> | event | ----------> | application |
* | stack | | task | event | task |
* |-----------| |-------------| |-------------|
* /|\ |
* | |
* event | |
* | |
* | |
* --------------- |
* | | |
* | WiFi Driver |/__________________|
* | |\ API call
* | |
* |-------------|
*
* The WiFi driver can be consider as black box, it knows nothing about the high layer code, such as
* TCPIP stack, application task, event task etc, all it can do is to receive API call from high layer
* or post event queue to a specified Queue, which is initialized by API esp_wifi_init().
*
* The event task is a daemon task, which receives events from WiFi driver or from other subsystem, such
* as TCPIP stack, event task will call the default callback function on receiving the event. For example,
* on receiving event SYSTEM_EVENT_STA_CONNECTED, it will call tcpip_adapter_start() to start the DHCP
* client in it's default handler.
*
* Application can register it's own event callback function by API esp_event_init, then the application callback
* function will be called after the default callback. Also, if application doesn't want to execute the callback
* in the event task, what it needs to do is to post the related event to application task in the application callback function.
*
* The application task (code) generally mixes all these thing together, it calls APIs to init the system/WiFi and
* handle the events when necessary.
*
*/
#ifndef __ESP_WIFI_H__
#define __ESP_WIFI_H__
#include <stdint.h>
#include <stdbool.h>
#include "freertos/FreeRTOS.h"
#include "freertos/queue.h"
#include "rom/queue.h"
#include "esp_err.h"
#include "esp_wifi_types.h"
#include "esp_event.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
system_event_handler_t event_handler; /**< WiFi event handler */
} wifi_init_config_t;
#define WIFI_INIT_CONFIG_DEFAULT() { \
.event_handler = &esp_event_send, \
};
/**
* @brief Init WiFi
* Alloc resource for WiFi driver, such as WiFi control structure, RX/TX buffer,
* WiFi NVS structure etc, this WiFi also start WiFi task
*
* @attention 1. This API must be called before all other WiFi API can be called
* @attention 2. Generally we should init event_q in *config, WiFi driver will post the event
* to this queue when event happens, such as, when station connects to WiFi, WiFi driver
* will post station connected event to this queue. If the queue is not initialized, WiFi
* will not post any events
*
* @param wifi_init_config_t *config : provide WiFi init configuration
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_init(wifi_init_config_t *config);
/**
* @brief Deinit WiFi
* Free all resource allocated in esp_wifi_init and stop WiFi task
*
* @attention 1. This API should be called if you want to remove WiFi driver from the system
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_deinit(void);
/**
* @brief Set the WiFi operating mode
*
* Set the WiFi operating mode as station, soft-AP or station+soft-AP,
* The default mode is soft-AP mode.
*
* @param wifi_mode_t mode : WiFi operating modes:
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_set_mode(wifi_mode_t mode);
/**
* @brief Get current operating mode of WiFi
*
* @param wifi_mode_t *mode : store current WiFi mode
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_get_mode(wifi_mode_t *mode);
/**
* @brief Start WiFi according to current configuration
* If mode is WIFI_MODE_STA, it create station control block and start station
* If mode is WIFI_MODE_AP, it create soft-AP control block and start soft-AP
* If mode is WIFI_MODE_APSTA, it create soft-AP and station control block and start soft-AP and station
*
* @param null
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_start(void);
/**
* @brief Stop WiFi
If mode is WIFI_MODE_STA, it stop station and free station control block
* If mode is WIFI_MODE_AP, it stop soft-AP and free soft-AP control block
* If mode is WIFI_MODE_APSTA, it stop station/soft-AP and free station/soft-AP control block
*
* @param null
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_stop(void);
/**
* @brief Connect the ESP32 WiFi station to the AP.
*
* @attention 1. This API only impact WIFI_MODE_STA or WIFI_MODE_APSTA mode
* @attention 2. If the ESP32 is connected to an AP, call esp_wifi_disconnect to disconnect.
*
* @param null
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_connect(void);
/**
* @brief Disconnect the ESP32 WiFi station from the AP.
*
* @param null
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_disconnect(void);
/**
* @brief Currently this API is just an stub API
*
* @param null
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_clear_fast_connect(void);
/**
* @brief deauthenticate all stations or associated id equals to aid
*
* @param uint16_t aid : when aid is 0, deauthenticate all stations, otherwise deauthenticate station whose associated id is aid
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_deauth_sta(uint16_t aid);
/**
* @brief Scan all available APs.
*
* @attention If this API is called, the found APs are stored in WiFi driver dynamic allocated memory and the
* will be freed in esp_wifi_get_ap_list, so generally, call esp_wifi_get_ap_list to cause
* the memory to be freed once the scan is done
*
* @param struct scan_config *config : configuration of scanning
* @param bool block : if block is true, this API will block the caller until the scan is done, otherwise
* it will return immediately
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_scan_start(wifi_scan_config_t *conf, bool block);
/**
* @brief Stop the scan in process
*
* @param null
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_scan_stop(void);
/**
* @brief Get number of APs found in last scan
*
* @param uint16_t *number : store number of APIs found in last scan
*
* @attention This API can only be called when the scan is completed, otherwise it may get wrong value
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_scan_get_ap_num(uint16_t *number);
/**
* @brief Get AP list found in last scan
*
* @param uint16_t *number : as input param, it stores max AP number ap_records can hold, as output param, it store
the actual AP number this API returns
* @param wifi_ap_record_t *ap_records: wifi_ap_record_t array to hold the found APs
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_scan_get_ap_records(uint16_t *number, wifi_ap_record_t *ap_records);
/**
* @brief Get information of AP associated with ESP32 station
*
* @param wifi_ap_record_t *ap_info: the wifi_ap_record_t to hold station assocated AP
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_sta_get_ap_info(wifi_ap_record_t *ap_info);
/**
* @brief Set current power save type
*
* @param wifi_ps_type_t type : power save type
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_set_ps(wifi_ps_type_t type);
/**
* @brief Get current power save type
*
* @param wifi_ps_type_t *type : store current power save type
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_get_ps(wifi_ps_type_t *type);
/**
* @brief Set protocol type of specified interface
* The default protocol is (WIFI_PROTOCOL_11B|WIFI_PROTOCOL_11G|WIFI_PROTOCOL_11N)
*
* @attention Currently we only support 802.11b or 802.11bg or 802.11bgn mode
*
* @param wifi_interface_t ifx : interfaces
* @param uint8_t protocol : WiFi protocol bitmap
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_set_protocol(wifi_interface_t ifx, uint8_t protocol_bitmap);
/**
* @brief Get the current protocol bitmap of specified ifx
*
* @param wifi_interface_t ifx : interfaces
* @param uint8_t protocol : store current WiFi protocol bitmap of interface ifx
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_get_protocol(wifi_interface_t ifx, uint8_t *protocol_bitmap);
/**
* @brief Set the bandwidth of ESP32 specified interface
*
* @attention 1. API return false if try to configure a interface that is not enable
* @attention 2. WIFI_BW_HT40 is supported only when the interface support 11N
*
* @param wifi_interface_t ifx : interface to be configured
* @param wifi_bandwidth_t bw : bandwidth
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_set_bandwidth(wifi_interface_t ifx, wifi_bandwidth_t bw);
/**
* @brief Get the bandwidth of ESP32 specified interface
*
* @attention 1. API return false if try to get a interface that is not enable
*
* @param wifi_interface_t ifx : interface to be configured
* @param wifi_bandwidth_t *bw : store bandwidth of interface ifx
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_get_bandwidth(wifi_interface_t ifx, wifi_bandwidth_t *bw);
/**
* @brief Set primary/second channel of ESP32
*
* @attention 1. This is a special API for sniffer
*
* @param uint8_t primary : for HT20, primary is the channel number, for HT40, primary is the primary channel
* @param wifi_second_chan_t second : for HT20, second is ignored, for HT40, second is the second channel
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_set_channel(uint8_t primary, wifi_second_chan_t second);
/**
* @brief Get the primary/second channel of ESP32
*
* @attention 1. API return false if try to get a interface that is not enable
*
* @param uint8_t *primary : store current primary channel
* @param wifi_second_chan_t *second : store current second channel
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_get_channel(uint8_t *primary, wifi_second_chan_t *second);
/**
* @brief Set country code
* The default value is WIFI_COUNTRY_CN
*
* @param wifi_country_t country : country type
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_set_country(wifi_country_t country);
/**
* @brief Get country code
*
* @param wifi_country_t country : store current country
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_get_country(wifi_country_t *country);
/**
* @brief Set MAC address of the ESP32 WiFi station or the soft-AP interface.
*
* @attention 1. This API can only be called when the interface is disabled
* @attention 2. ESP32 soft-AP and station have different MAC addresses, do not set them to be the same.
* - The bit0 of the first byte of ESP32 MAC address can not be 1. For example, the MAC address
* can set to be "1a:XX:XX:XX:XX:XX", but can not be "15:XX:XX:XX:XX:XX".
*
* @param wifi_interface_t ifx : interface
* @param uint8 mac[6]: the MAC address.
*
* @return true : succeed
* @return false : fail
*/
esp_err_t esp_wifi_set_mac(wifi_interface_t ifx, uint8_t mac[6]);
/**
* @brief Get mac of specified interface
*
* @param uint8_t mac[6] : store mac of this interface ifx
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_get_mac(wifi_interface_t ifx, uint8_t mac[6]);
/**
* @brief The RX callback function in the promiscuous mode.
*
* Each time a packet is received, the callback function will be called.
*
* @param void *buf : the data received
* @param uint16_t len : data length
*
* @return ESP_OK : succeed
* @return others : fail
*/
typedef void (* wifi_promiscuous_cb_t)(void *buf, uint16_t len);
/**
* @brief Register the RX callback function in the promiscuous mode.
*
* Each time a packet is received, the registered callback function will be called.
*
* @param wifi_promiscuous_cb_t cb : callback
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_set_promiscuous_rx_cb(wifi_promiscuous_cb_t cb);
/**
* @brief Enable the promiscuous mode.
*
* @param bool promiscuous : false - disable / true - enable
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_set_promiscuous(bool en);
/**
* @brief Get the promiscuous mode.
*
* @param bool *enable : store the current status of promiscuous mode
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_get_promiscuous(bool *en);
/**
* @brief Set the configuration of the ESP32 STA or AP
*
* @attention 1. This API can be called only when specified interface is enabled, otherwise, API fail
* @attention 2. For station configuration, bssid_set needs to be 0; and it needs to be 1 only when users need to check the MAC address of the AP.
* @attention 3. ESP32 is limited to only one channel, so when in the soft-AP+station mode, the soft-AP will adjust its channel automatically to be the same as
* the channel of the ESP32 station.
*
* @param wifi_interface_t ifx : interface
* @param wifi_config_t *conf : station or soft-AP configuration
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_set_config(wifi_interface_t ifx, wifi_config_t *conf);
/**
* @brief Get configuration of specified interface
*
* @param wifi_interface_t ifx : interface
* @param wifi_config_t *conf : station or soft-AP configuration
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_get_config(wifi_interface_t ifx, wifi_config_t *conf);
/**
* @brief Get STAs associated with soft-AP
*
* @attention SSC only API
*
* @param wifi_sta_list_t *sta: station list
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_ap_get_sta_list(wifi_sta_list_t *sta);
/**
* @brief Set the WiFi API configuration storage type
*
* @attention 1. The default value is WIFI_STORAGE_FLASH
*
* @param wifi_storage_t storage : storage type
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_set_storage(wifi_storage_t storage);
/**
* @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
* @return others : fail
*/
esp_err_t esp_wifi_reg_rxcb(wifi_interface_t ifx, wifi_rxcb_t fn);
/**
* @brief Set auto connect
* The default value is true
*
* @attention 1.
*
* @param bool en : true - enable auto connect / false - disable auto connect
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_set_auto_connect(bool en);
/**
* @brief Get the auto connect flag
*
* @param bool *en : store current auto connect configuration
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_get_auto_connect(bool *en);
/**
* @brief Set vendor specific element
*
* @param bool enable : enable or not
* @param wifi_vendor_ie_type_t type : 0 - WIFI_VND_IE_TYPE_BEACON
* 1 - WIFI_VND_IE_TYPE_PROBE_REQ
* 2 - WIFI_VND_IE_TYPE_PROBE_RESP
* 3 - WIFI_VND_IE_TYPE_ASSOC_REQ
* 4 - WIFI_VND_IE_TYPE_ASSOC_RESP
* @param wifi_vendor_ie_id_t idx : 0 - WIFI_VND_IE_ID_0
1 - WIFI_VND_IE_ID_1
* @param uint8_t *vnd_ie : pointer to a vendor specific element
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_set_vendor_ie(bool enable, wifi_vendor_ie_type_t type, wifi_vendor_ie_id_t idx, uint8_t *vnd_ie);
/**
* @brief Define function pointer for vendor specific element callback
* @param void *ctx : reserved
* @param wifi_vendor_ie_type_t type : 0 - WIFI_VND_IE_TYPE_BEACON
* 1 - WIFI_VND_IE_TYPE_PROBE_REQ
* 2 - WIFI_VND_IE_TYPE_PROBE_RESP
* 3 - WIFI_VND_IE_TYPE_ASSOC_REQ
* 4 - WIFI_VND_IE_TYPE_ASSOC_RESP
* @param const uint8_t sa[6] : source address
* @param const uint8_t *vnd_ie : pointer to a vendor specific element
* @param int rssi : received signal strength indication
*/
typedef void (*esp_vendor_ie_cb_t) (void *ctx, wifi_vendor_ie_type_t type, const uint8_t sa[6], const uint8_t *vnd_ie, int rssi);
/**
* @brief Set vendor specific element callback
*
* @param esp_vendor_ie_cb_t cb : callback function
* @param void *ctx : reserved
*
* @return ESP_OK : succeed
* @return others : fail
*/
esp_err_t esp_wifi_set_vendor_ie_cb(esp_vendor_ie_cb_t cb, void *ctx);
#ifdef __cplusplus
}
#endif
#endif /* __ESP_WIFI_H__ */
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