/** @file
 *
 * Wiretap Library
 * Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#ifndef __W_PCAPNG_H__
#define __W_PCAPNG_H__

#include <stdint.h>

#include "wtap.h"
#include "ws_symbol_export.h"

#define PCAPNG_MAGIC         0x1A2B3C4D
#define PCAPNG_SWAPPED_MAGIC 0x4D3C2B1A

#define PCAPNG_MAJOR_VERSION 1
#define PCAPNG_MINOR_VERSION 0

/* pcapng: common block header file encoding for every block type */
typedef struct pcapng_block_header_s {
    uint32_t block_type;
    uint32_t block_total_length;
    /* x bytes block_body */
    /* uint32_t block_total_length */
} pcapng_block_header_t;

/* pcapng: section header block file encoding */
typedef struct pcapng_section_header_block_s {
    /* pcapng_block_header_t */
    uint32_t magic;
    uint16_t version_major;
    uint16_t version_minor;
    uint64_t section_length; /* might be -1 for unknown */
    /* ... Options ... */
} pcapng_section_header_block_t;

/* pcapng: interface description block file encoding */
typedef struct pcapng_interface_description_block_s {
    uint16_t linktype;
    uint16_t reserved;
    uint32_t snaplen;
    /* ... Options ... */
} pcapng_interface_description_block_t;

/* pcapng: interface statistics block file encoding */
typedef struct pcapng_interface_statistics_block_s {
    uint32_t interface_id;
    uint32_t timestamp_high;
    uint32_t timestamp_low;
    /* ... Options ... */
} pcapng_interface_statistics_block_t;

/* pcapng: Decryption Secrets Block file encoding */
typedef struct pcapng_decryption_secrets_block_s {
    uint32_t secrets_type;   /* Secrets Type, see secrets-types.h */
    uint32_t secrets_len;    /* Size of variable-length secrets data. */
    /* x bytes Secrets Data. */
    /* ... Options ... */
} pcapng_decryption_secrets_block_t;

struct pcapng_option_header {
    uint16_t type;
    uint16_t value_length;
};

/**
 * @brief Opens a pcapng file.
 *
 * @param wth Pointer to the wtap structure.
 * @param err Pointer to an integer that will be set to an error code if an error occurs.
 * @param err_info Pointer to a string that will be set to an error message if an error occurs.
 * @return wtap_open_return_val The result of opening the file.
 */
wtap_open_return_val pcapng_open(wtap *wth, int *err, char **err_info);

#endif
