esp-idf/components/esp_hw_support/include/esp_mac.h

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2021-02-26 07:16:08 +00:00
// Copyright 2021 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.
#pragma once
#include "esp_err.h"
#include "sdkconfig.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef enum {
ESP_MAC_WIFI_STA,
ESP_MAC_WIFI_SOFTAP,
ESP_MAC_BT,
ESP_MAC_ETH,
} esp_mac_type_t;
/** @cond */
#define TWO_UNIVERSAL_MAC_ADDR 2
#define FOUR_UNIVERSAL_MAC_ADDR 4
#if CONFIG_IDF_TARGET_ESP32
#define UNIVERSAL_MAC_ADDR_NUM CONFIG_ESP32_UNIVERSAL_MAC_ADDRESSES
#elif CONFIG_IDF_TARGET_ESP32S2
#define UNIVERSAL_MAC_ADDR_NUM CONFIG_ESP32S2_UNIVERSAL_MAC_ADDRESSES
#elif CONFIG_IDF_TARGET_ESP32S3
#define UNIVERSAL_MAC_ADDR_NUM CONFIG_ESP32S3_UNIVERSAL_MAC_ADDRESSES
#elif CONFIG_IDF_TARGET_ESP32C3
#define UNIVERSAL_MAC_ADDR_NUM CONFIG_ESP32C3_UNIVERSAL_MAC_ADDRESSES
#endif
/** @endcond */
/**
* @brief Set base MAC address with the MAC address which is stored in BLK3 of EFUSE or
* external storage e.g. flash and EEPROM.
*
* Base MAC address is used to generate the MAC addresses used by network interfaces.
*
* If using a custom base MAC address, call this API before initializing any network interfaces.
* Refer to the ESP-IDF Programming Guide for details about how the Base MAC is used.
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*
* @note Base MAC must be a unicast MAC (least significant bit of first byte must be zero).
*
* @note If not using a valid OUI, set the "locally administered" bit
* (bit value 0x02 in the first byte) to avoid collisions.
*
* @param mac base MAC address, length: 6 bytes.
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*
* @return ESP_OK on success
* ESP_ERR_INVALID_ARG If mac is NULL or is not a unicast MAC
*/
esp_err_t esp_base_mac_addr_set(const uint8_t *mac);
/**
* @brief Return base MAC address which is set using esp_base_mac_addr_set.
*
* @note If no custom Base MAC has been set, this returns the pre-programmed Espressif base MAC address.
*
* @param mac base MAC address, length: 6 bytes.
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*
* @return ESP_OK on success
* ESP_ERR_INVALID_MAC base MAC address has not been set
*/
esp_err_t esp_base_mac_addr_get(uint8_t *mac);
/**
* @brief Return base MAC address which was previously written to BLK3 of EFUSE.
*
* Base MAC address is used to generate the MAC addresses used by the networking interfaces.
* This API returns the custom base MAC address which was previously written to EFUSE BLK3 in
* a specified format.
*
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* Writing this EFUSE allows setting of a different (non-Espressif) base MAC address. It is also
* possible to store a custom base MAC address elsewhere, see esp_base_mac_addr_set() for details.
*
* @note This function is currently only supported on ESP32.
*
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* @param mac base MAC address, length: 6 bytes.
*
* @return ESP_OK on success
* ESP_ERR_INVALID_VERSION An invalid MAC version field was read from BLK3 of EFUSE
* ESP_ERR_INVALID_CRC An invalid MAC CRC was read from BLK3 of EFUSE
*/
esp_err_t esp_efuse_mac_get_custom(uint8_t *mac);
/**
* @brief Return base MAC address which is factory-programmed by Espressif in EFUSE.
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*
* @param mac base MAC address, length: 6 bytes.
*
* @return ESP_OK on success
*/
esp_err_t esp_efuse_mac_get_default(uint8_t *mac);
/**
* @brief Read base MAC address and set MAC address of the interface.
*
* This function first get base MAC address using esp_base_mac_addr_get().
* Then calculates the MAC address of the specific interface requested,
* refer to ESP-IDF Programming Guide for the algorithm.
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*
* @param mac MAC address of the interface, length: 6 bytes.
* @param type Type of MAC address to return
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*
* @return ESP_OK on success
*/
esp_err_t esp_read_mac(uint8_t* mac, esp_mac_type_t type);
/**
* @brief Derive local MAC address from universal MAC address.
*
* This function copies a universal MAC address and then sets the "locally
* administered" bit (bit 0x2) in the first octet, creating a locally
* administered MAC address.
*
* If the universal MAC address argument is already a locally administered MAC
* address, then the first octet is XORed with 0x4 in order to create a different
* locally administered MAC address.
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*
* @param local_mac Derived local MAC address, length: 6 bytes.
* @param universal_mac Source universal MAC address, length: 6 bytes.
*
* @return ESP_OK on success
*/
esp_err_t esp_derive_local_mac(uint8_t* local_mac, const uint8_t* universal_mac);
#ifdef __cplusplus
}
#endif