From Jon Ellch via bug #5175: Add PPI-GPS protocol dissector patch

Minor changes by me as detailed in the bug's comment #8.


svn path=/trunk/; revision=34956

1 files changed, 92 insertions, 0 deletions

diff --git a/epan/dissectors/packet-ppi-geolocation-common.h b/epan/dissectors/packet-ppi-geolocation-common.h
new file mode 100644
index 0000000000..d92a855569
--- /dev/null
+++ b/epan/dissectors/packet-ppi-geolocation-common.h
@@ -0,0 +1,92 @@
+/* packet-ppi-geolocation-common.h
+ * Routines for PPI-GEOLOCATION  dissection
+ * Copyright 2010, Harris Corp, jellch@harris.com
+ *
+ * $Id$
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef __PPI_GEOLOCATION_COMMON_H
+#define __PPI_GEOLOCATION_COMMON_H
+#include <glib.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' gdoubles for displaying.
+ * Documentation on these formats can be found in the PPI-GEOLOCATION specification
+ */
+gdouble fixed3_7_to_gdouble(guint32 in);
+gdouble fixed3_6_to_gdouble(guint32 in);
+gdouble fixed6_4_to_gdouble(guint32 in);
+/*
+ * Some values are encoded as 32-bit unsigned nano-second counters.
+ * Usually we want to display these values as doubles.
+ */
+gdouble ns_counter_to_gdouble(guint32 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:
+ */
+
+