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/* packet-ppi-geolocation-common.h
* Routines for PPI-GEOLOCATION dissection
* Copyright 2010, Harris Corp, jellch@harris.com
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __PPI_GEOLOCATION_COMMON_H
#define __PPI_GEOLOCATION_COMMON_H
#include <inttypes.h>
/*
* Declarations from shared PPI-GEOLOCATION functions.
*
*/
/*
* these constants are offsets into base_geotag header, which is bitwise-compatible
* with a radiotap header
*/
#define PPI_GEOBASE_MIN_HEADER_LEN 8 /* minimum header length */
#define PPI_GEOBASE_VERSION_OFFSET 0 /* offset of version field */
#define PPI_GEOBASE_LENGTH_OFFSET 2 /* offset of length field */
#define PPI_GEOBASE_PRESENT_OFFSET 4 /* offset of "present" field */
/*
* These BITNO macros were accquired from the radiotap parser. maybe we can share them
* eventually
*/
#define BITNO_32(x) (((x) >> 16) ? 16 + BITNO_16((x) >> 16) : BITNO_16((x)))
#define BITNO_16(x) (((x) >> 8) ? 8 + BITNO_8((x) >> 8) : BITNO_8((x)))
#define BITNO_8(x) (((x) >> 4) ? 4 + BITNO_4((x) >> 4) : BITNO_4((x)))
#define BITNO_4(x) (((x) >> 2) ? 2 + BITNO_2((x) >> 2) : BITNO_2((x)))
#define BITNO_2(x) (((x) & 2) ? 1 : 0)
#define BIT(n) (1 << n)
/*
* Floating point numbers are stored on disk in a handful of fixed-point formats (fixedX_Y)
* designed to preserve the appropriate amount of precision vs range. These functions convert
* the fixedX_Y fixed point values into 'native' doubles for displaying.
* Documentation on these formats can be found in the PPI-GEOLOCATION specification
*/
double ppi_fixed3_7_to_double(uint32_t in);
double ppi_fixed3_6_to_double(uint32_t in);
double ppi_fixed6_4_to_double(uint32_t in);
/*
* Some values are encoded as 32-bit unsigned nano-second counters.
* Usually we want to display these values as doubles.
*/
double ppi_ns_counter_to_double(uint32_t in);
typedef enum {
PPI_GEOLOCATION_HARRIS = 0x00485253 /* 00SRH */
} ppi_geolocation_appstr_num;
#endif
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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