espnow_receiver.cpp File Reference

ESP-NOW receiver implementation for test unit with secure pairing. More...

#include "espnow_receiver.hpp"
#include "espnow_protocol.hpp"
#include "espnow_peer_store.hpp"
#include <cstring>
#include "esp_system.h"
#include "nvs_flash.h"
#include "esp_idf_pedantic_compat.hpp"
#include "esp_log.h"

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Classes
struct	RawMsg

Functions
static bool	isZeroMac (const uint8_t mac[6])
static bool	macEq (const uint8_t a[6], const uint8_t b[6])
static void	tryAddEspNowPeer (const uint8_t mac[6])
static void	setActiveUiMac (const uint8_t mac[6])
static void	espnowRecvCb (const esp_now_recv_info_t *info, const uint8_t *data, int len)
static void	espnowSendCb (const wifi_tx_info_t *info, esp_now_send_status_t status)
static void	recvTask (void *)
static void	handlePacket (const RawMsg &msg, const EspNowPacket &pkt, uint16_t recv_crc)
static void	handlePairingRequest (const uint8_t *src_mac, const EspNowPacket &pkt)
static void	handlePairingConfirm (const uint8_t *src_mac, const EspNowPacket &pkt)
static bool	sendPacketTo (const uint8_t *dst_mac, MsgType type, const void *payload, uint8_t payload_len)
static bool	sendPacketToUi (MsgType type, const void *payload, uint8_t payload_len)

Variables
static const char *	TAG = "EspNowRx"
static QueueHandle_t	s_proto_event_queue = nullptr
static uint8_t	s_next_msg_id = 1
static SecuritySettings	s_security {}
	Security settings with approved peer list.
static uint8_t	s_active_ui_board_mac [6] = {0}
	Active UI board MAC for replies (most recent approved sender)
static QueueHandle_t	s_raw_recv_queue = nullptr
	Receive queue from ISR to this module.
static volatile bool	s_pairing_mode = false
	Pairing mode state.
static volatile TickType_t	s_pairing_timeout_tick = 0
static bool	s_awaiting_pairing_confirm = false
	Pending pairing state (waiting for confirm after sending response)
static uint8_t	s_pending_requester_mac [6] = {0}
static uint8_t	s_my_challenge [CHALLENGE_SIZE] = {0}
static TickType_t	s_pairing_confirm_timeout = 0

Detailed Description

ESP-NOW receiver implementation for test unit with secure pairing.

Protocol compatible with esp32_remote_controller (6-byte header).

Features:

• Pre-configured MAC address support (backward compatibility)
• Secure pairing with HMAC mutual authentication
• NVS-based approved peer storage
• Message validation against approved peer list

Function Documentation

espnowRecvCb()

static void espnowRecvCb ( const esp_now_recv_info_t * info, const uint8_t * data, int len )

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espnowSendCb()

static void espnowSendCb ( const wifi_tx_info_t * info, esp_now_send_status_t status )

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handlePacket()

static void handlePacket ( const RawMsg & msg, const EspNowPacket & pkt, uint16_t recv_crc )

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handlePairingConfirm()

static void handlePairingConfirm ( const uint8_t * src_mac, const EspNowPacket & pkt )

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handlePairingRequest()

static void handlePairingRequest ( const uint8_t * src_mac, const EspNowPacket & pkt )

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isZeroMac()

static bool isZeroMac ( const uint8_t mac[6] )

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macEq()

static bool macEq ( const uint8_t a[6], const uint8_t b[6] )

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recvTask()

static void recvTask ( void * arg )

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sendPacketTo()

static bool sendPacketTo ( const uint8_t * dst_mac, MsgType type, const void * payload, uint8_t payload_len )

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sendPacketToUi()

static bool sendPacketToUi ( MsgType type, const void * payload, uint8_t payload_len )

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setActiveUiMac()

static void setActiveUiMac ( const uint8_t mac[6] )

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tryAddEspNowPeer()

static void tryAddEspNowPeer ( const uint8_t mac[6] )

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Variable Documentation

s_active_ui_board_mac

uint8_t s_active_ui_board_mac[6] = {0}

static

Active UI board MAC for replies (most recent approved sender)

s_awaiting_pairing_confirm

bool s_awaiting_pairing_confirm = false

static

Pending pairing state (waiting for confirm after sending response)

s_my_challenge

uint8_t s_my_challenge[CHALLENGE_SIZE] = {0}

static

s_next_msg_id

uint8_t s_next_msg_id = 1

static

s_pairing_confirm_timeout

TickType_t s_pairing_confirm_timeout = 0

static

s_pairing_mode

volatile bool s_pairing_mode = false

static

Pairing mode state.

s_pairing_timeout_tick

volatile TickType_t s_pairing_timeout_tick = 0

static

s_pending_requester_mac

uint8_t s_pending_requester_mac[6] = {0}

static

s_proto_event_queue

QueueHandle_t s_proto_event_queue = nullptr

static

s_raw_recv_queue

QueueHandle_t s_raw_recv_queue = nullptr

static

Receive queue from ISR to this module.

s_security

SecuritySettings s_security {}

static

Security settings with approved peer list.

TAG

const char* TAG = "EspNowRx"

static