wiretap/pcapng.h

   1 /** @file
   2  *
   3  * Wiretap Library
   4  * Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
   5  *
   6  * SPDX-License-Identifier: GPL-2.0-or-later
   7  */
   8
   9 #ifndef __W_PCAPNG_H__
  10 #define __W_PCAPNG_H__
  11
  12 #include <glib.h>
  13 #include "wtap.h"
  14 #include "ws_symbol_export.h"
  15
  16 #define PCAPNG_MAGIC         0x1A2B3C4D
  17 #define PCAPNG_SWAPPED_MAGIC 0x4D3C2B1A
  18
  19 #define PCAPNG_MAJOR_VERSION 1
  20 #define PCAPNG_MINOR_VERSION 0
  21
  22 /* pcapng: common block header file encoding for every block type */
  23 typedef struct pcapng_block_header_s {
  24     uint32_t block_type;
  25     uint32_t block_total_length;
  26     /* x bytes block_body */
  27     /* uint32_t block_total_length */
  28 } pcapng_block_header_t;
  29
  30 /* pcapng: section header block file encoding */
  31 typedef struct pcapng_section_header_block_s {
  32     /* pcapng_block_header_t */
  33     uint32_t magic;
  34     uint16_t version_major;
  35     uint16_t version_minor;
  36     uint64_t section_length; /* might be -1 for unknown */
  37     /* ... Options ... */
  38 } pcapng_section_header_block_t;
  39
  40 /* pcapng: interface description block file encoding */
  41 typedef struct pcapng_interface_description_block_s {
  42     uint16_t linktype;
  43     uint16_t reserved;
  44     uint32_t snaplen;
  45     /* ... Options ... */
  46 } pcapng_interface_description_block_t;
  47
  48 /* pcapng: interface statistics block file encoding */
  49 typedef struct pcapng_interface_statistics_block_s {
  50     uint32_t interface_id;
  51     uint32_t timestamp_high;
  52     uint32_t timestamp_low;
  53     /* ... Options ... */
  54 } pcapng_interface_statistics_block_t;
  55
  56 /* pcapng: Decryption Secrets Block file encoding */
  57 typedef struct pcapng_decryption_secrets_block_s {
  58     uint32_t secrets_type;   /* Secrets Type, see secrets-types.h */
  59     uint32_t secrets_len;    /* Size of variable-length secrets data. */
  60     /* x bytes Secrets Data. */
  61     /* ... Options ... */
  62 } pcapng_decryption_secrets_block_t;
  63
  64 struct pcapng_option_header {
  65     uint16_t type;
  66     uint16_t value_length;
  67 };
  68
  69 /*
  70  * Minimum IDB size = minimum block size + size of fixed length portion of IDB.
  71  */
  72 #define MIN_IDB_SIZE    ((uint32_t)(MIN_BLOCK_SIZE + sizeof(pcapng_interface_description_block_t)))
  73 #define MIN_DSB_SIZE    ((uint32_t)(MIN_BLOCK_SIZE + sizeof(pcapng_decryption_secrets_block_t)))
  74
  75 wtap_open_return_val pcapng_open(wtap *wth, int *err, char **err_info);
  76
  77 #endif