forked from osmocom/wireshark
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/* packet-ppi-geolocation-common.h
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* Routines for PPI-GEOLOCATION dissection
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* Copyright 2010, Harris Corp, jellch@harris.com
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef __PPI_GEOLOCATION_COMMON_H
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#define __PPI_GEOLOCATION_COMMON_H
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/*
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* Declarations from shared PPI-GEOLOCATION functions.
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*
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*/
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/*
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* these constants are offsets into base_geotag header, which is bitwise-compatible
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* with a radiotap header
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*/
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#define PPI_GEOBASE_MIN_HEADER_LEN 8 /* minimum header length */
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#define PPI_GEOBASE_VERSION_OFFSET 0 /* offset of version field */
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#define PPI_GEOBASE_LENGTH_OFFSET 2 /* offset of length field */
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#define PPI_GEOBASE_PRESENT_OFFSET 4 /* offset of "present" field */
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/*
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* These BITNO macros were accquired from the radiotap parser. maybe we can share them
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* eventually
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*/
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#define BITNO_32(x) (((x) >> 16) ? 16 + BITNO_16((x) >> 16) : BITNO_16((x)))
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#define BITNO_16(x) (((x) >> 8) ? 8 + BITNO_8((x) >> 8) : BITNO_8((x)))
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#define BITNO_8(x) (((x) >> 4) ? 4 + BITNO_4((x) >> 4) : BITNO_4((x)))
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#define BITNO_4(x) (((x) >> 2) ? 2 + BITNO_2((x) >> 2) : BITNO_2((x)))
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#define BITNO_2(x) (((x) & 2) ? 1 : 0)
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#define BIT(n) (1 << n)
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/*
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* Floating point numbers are stored on disk in a handful of fixed-point formats (fixedX_Y)
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* designed to preserve the appropriate amount of precision vs range. These functions convert
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* the fixedX_Y fixed point values into 'native' gdoubles for displaying.
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* Documentation on these formats can be found in the PPI-GEOLOCATION specification
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*/
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gdouble ppi_fixed3_7_to_gdouble(guint32 in);
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gdouble ppi_fixed3_6_to_gdouble(guint32 in);
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gdouble ppi_fixed6_4_to_gdouble(guint32 in);
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/*
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* Some values are encoded as 32-bit unsigned nano-second counters.
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* Usually we want to display these values as doubles.
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*/
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gdouble ppi_ns_counter_to_gdouble(guint32 in);
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typedef enum {
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PPI_GEOLOCATION_HARRIS = 0x00485253 /* 00SRH */
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} ppi_geolocation_appstr_num;
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#endif
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/*
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* Editor modelines
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*
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* Local Variables:
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* c-basic-offset: 4
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* ex: set shiftwidth=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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