// EMAC IEEE 1588 clock and hardware timestamps for PTP over UDP/IPv4.
#pragma once

#include <stdbool.h>
#include <stdint.h>

#include "esp_eth_driver.h"
#include "esp_eth_mac.h"
#include "esp_netif.h"

#define PTP_MSG_SYNC        0x0
#define PTP_MSG_DELAY_REQ   0x1
#define PTP_MSG_FOLLOW_UP   0x8
#define PTP_MSG_DELAY_RESP  0x9
#define PTP_MSG_ANNOUNCE    0xB

// Start the EMAC PTP clock, enable IPv4/UDP timestamping and hook the RX path.
esp_err_t ptp_hw_init(esp_eth_handle_t eth, esp_netif_t *netif);
// Hardware RX timestamp of an event message (UDP port 319), looked up by type,
// sequence ID and sourcePortIdentity (10 bytes). Each record is returned once.
bool ptp_hw_rx_ts(uint8_t msg_type, uint16_t seq, const uint8_t *src_port_id, eth_mac_time_t *ts);
esp_err_t ptp_hw_get_time(eth_mac_time_t *t);
// Send a PTP event message as a raw Ethernet/IPv4/UDP frame (port 319 -> 319) and return its
// hardware TX timestamp. dst_ip/dst_mac: 224.0.1.129 / 01:00:5e:00:01:81 or the GM unicast.
esp_err_t ptp_hw_send_event(const uint8_t dst_mac[6], uint32_t dst_ip, uint8_t dscp,
                            const uint8_t *msg, size_t len, eth_mac_time_t *tx_ts);