/*
**********************************************************************************************
*	File: pio_packet_queue.h
*   Description: pio packet queue structure and api
*	Authors: Liu WenTan <liuwentan@geedgenetworks.com>
*	Date:    2022-07-15
*   Copyright: (c) 2018-2022 Geedge Networks, Inc. All rights reserved.
***********************************************************************************************
*/

#pragma once

#include <stdint.h>

#define PKT_QUEUE_MAX_NUM 256

#define CUSTOM_ZONE_LEN 64
#define ETHERNET_HEADER_LEN 14
#define DEFAULT_MTU 1500
#define DEFAULT_PACKET_SIZE (CUSTOM_ZONE_LEN + DEFAULT_MTU + ETHERNET_HEADER_LEN)

#define SIZE_OF_PIO_PACKET (DEFAULT_PACKET_SIZE + sizeof(struct pio_packet))

/*
 * @brief pcap_live/pcap_file mode packet structure
 *
 * |<-pkt_hdr    |<-pkt_payload
 * |             |
 * | struct pio_packet | custom zone | L2 header | ...... |
 *                        64bytes      14bytes    1500bytes
 *   
 * custom zone: user can set custom field
 * pkt_payload: received packet data
**/
struct pio_packet {
    /* pkt header pointer */
    void *pkt_hdr;

    /* pkt length */
    uint64_t pkt_len;

    /* pkt payload pointer */
    void *pkt_payload;

    /* reference counts */
    uint64_t ref_cnt;

	struct pio_packet *prev;
	
	struct pio_packet *next;
};

struct pio_packet_queue {
	struct pio_packet *top;
	struct pio_packet *bot;
	uint32_t len;
	pthread_mutex_t mutex_q;
};

void pio_packet_enqueue(struct pio_packet_queue *, struct pio_packet *);
struct pio_packet *pio_packet_dequeue(struct pio_packet_queue *);
void release_pio_packet_queue(struct pio_packet_queue *);