packet-asterix.h

/* packet-asterix.h
 *
 * Common definitions for ASTERIX dissector
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 * Copyright 1998 Gerald Combs
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#ifndef __PACKET_ASTERIX_H__
#define __PACKET_ASTERIX_H__
 
#include <epan/packet.h>
#include <epan/expert.h>
 
#define MAX_UAP_NAME_LENGTH 255
 
typedef struct {
    unsigned cat;
    int *edition_default_value;
    const enum_val_t *edition_enums;
    const char *edition_name;
    const char *edition_desc;
    bool cat_basic;
} dialog_cat_struct;
 
typedef struct {
    unsigned cat;
    unsigned ed;
    const char *edition_name;
    const char *edition_desc;
    int *int_default_value;
    const enum_val_t *int_enums;
} dialog_int_struct;
 
typedef int (*ttt)(tvbuff_t *, unsigned, proto_tree *, int);
typedef struct {
    const ttt *table_pointer;
    const int* const * table_pointer_expand;
    unsigned int table_size;
    char uap_name[MAX_UAP_NAME_LENGTH];
} table_params;
 
typedef struct {
    unsigned int start_index;
    unsigned int end_index;
} uap_table_indexes;
 
static bool asterix_extended_end (tvbuff_t *tvb, unsigned offset);
static unsigned asterix_get_unsigned_value(tvbuff_t *tvb, unsigned offset, unsigned bytes);
static int asterix_get_signed_value(tvbuff_t *tvb, unsigned offset, unsigned bytes);
static int get_signed_int(unsigned value, unsigned bits);
static unsigned asterix_dissect_fspec (tvbuff_t *tvb, unsigned offset, proto_tree *tree);
static bool asterix_field_exists (tvbuff_t *tvb, unsigned offset, unsigned bitIndex);
static unsigned asterix_fspec_len (tvbuff_t *tvb, unsigned offset);
static bool asterix_fspec_check (unsigned fspec_len, unsigned list_length, proto_item *ti);
static void get_expansion_table(unsigned int cat, int ed, table_params *table);
static unsigned asterix_parse_re_field (tvbuff_t *tvb, unsigned offset, proto_tree *tree, unsigned fspec_len, unsigned cat);
static void print_octal_string (tvbuff_t *tvb, unsigned offset, unsigned bit_offset, unsigned bit_size, unsigned byte_size, proto_tree *tree, int expand_var);
static void print_icao_string (tvbuff_t *tvb, unsigned offset, unsigned bit_offset, unsigned bit_size, unsigned byte_size, proto_tree *tree, int expand_var);
static void check_spare_bits (tvbuff_t *tvb, unsigned bit_offset, unsigned bit_size, proto_item *item);
 
static expert_field ei_asterix_overflow;
/* TODO: these should have an 'ei_' prefix, but usage is inside generated_dissector python module? */
static expert_field hf_asterix_spare_error;
static expert_field hf_asterix_fx_error;
static expert_field hf_asterix_fspec_error;
 
enum interpretations_depth_e {
  depth_10 = 10,
  depth_15 = 15,
  depth_20 = 20,
  depth_25 = 25,
  depth_30 = 30
};
 
static const enum_val_t interpretations_level_enum_vals[] = {
  {"interpretations_depth_10", "depth 10", depth_10},
  {"interpretations_depth_15", "depth 15", depth_15},
  {"interpretations_depth_20", "depth 20", depth_20},
  {"interpretations_depth_25", "depth 25", depth_25},
  {"interpretations_depth_30", "depth 30", depth_30},
  {NULL, NULL, 0}
};
 
#endif /* __PACKET_ASTERIX_H__ */