1 files changed, 88 insertions, 0 deletions
diff --git a/epan/dissectors/packet-ieee80211-radiotap-iter.h b/epan/dissectors/packet-ieee80211-radiotap-iter.h
new file mode 100644
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--- /dev/null
+++ b/epan/dissectors/packet-ieee80211-radiotap-iter.h
@@ -0,0 +1,88 @@
+/*
+ * Radiotap parser
+ *
+ * Copyright 2007		Andy Green <andy@warmcat.com>
+ * Copyright 2009		Johannes Berg <johannes@sipsolutions.net>
+ *
+ * SPDX-License-Identifier: (ISC OR GPL-2.0-only)
+ */
+
+#ifndef __RADIOTAP_ITER_H
+#define __RADIOTAP_ITER_H
+
+#define RADIOTAP_SUPPORT_OVERRIDES
+
+#include <glib.h>
+#include "packet-ieee80211-radiotap-defs.h"
+
+/* Radiotap header iteration
+ *   implemented in radiotap.c
+ */
+
+struct radiotap_override {
+	guint8 field;
+	guint align:4, size:4;
+};
+
+struct radiotap_align_size {
+	guint align:4, size:4;
+};
+
+struct ieee80211_radiotap_namespace {
+	const struct radiotap_align_size *align_size;
+	int n_bits;
+	guint32 oui;
+	guint8 subns;
+};
+
+struct ieee80211_radiotap_vendor_namespaces {
+	const struct ieee80211_radiotap_namespace *ns;
+	int n_ns;
+};
+
+/**
+ * struct ieee80211_radiotap_iterator - tracks walk thru present radiotap args
+ *
+ * Describes the radiotap parser state. Fields prefixed with an underscore
+ * must not be used by users of the parser, only by the parser internally.
+ */
+
+struct ieee80211_radiotap_iterator {
+	struct ieee80211_radiotap_header *_rtheader;				/**< pointer to the radiotap header we are walking through */
+	const struct ieee80211_radiotap_vendor_namespaces *_vns;		/**< vendor namespace definitions*/
+	const struct ieee80211_radiotap_namespace *current_namespace;		/**< pointer to the current namespace definition (or internally
+											%NULL if the current namespace is unknown)*/
+
+	unsigned char *_arg, *_next_ns_data;					/**< beginning of the next namespace's data */
+	guint32 *_next_bitmap;							/**< internal pointer to next present u32 */
+
+	unsigned char *this_arg;						/**< pointer to current radiotap arg; it is valid after each call
+											to ieee80211_radiotap_iterator_next() but also after
+											ieee80211_radiotap_iterator_init() where it will point to
+											the beginning of the actual data portion */
+#ifdef RADIOTAP_SUPPORT_OVERRIDES
+	const struct radiotap_override *overrides;				/**< override standard radiotap fields */
+	int n_overrides;							/**< number of overrides */
+#endif
+	int this_arg_index;							/**< index of current arg, valid after each successful call to
+										ieee80211_radiotap_iterator_next() */
+	int this_arg_size;							/**< length of the current arg, for convenience*/
+
+	int is_radiotap_ns;
+	int tlv_mode;
+
+	int _max_length;							/**< length of radiotap header in cpu byte ordering */
+	int _arg_index;								/**< next argument index */
+	guint32 _bitmap_shifter;						/**< internal shifter for curr u32 bitmap, b0 set == arg present */
+	int _reset_on_ext;							/**< internal; reset the arg index to 0 when going to the next bitmap word */
+};
+
+extern int ieee80211_radiotap_iterator_init(
+	struct ieee80211_radiotap_iterator *iterator,
+	struct ieee80211_radiotap_header *radiotap_header,
+	int max_length, const struct ieee80211_radiotap_vendor_namespaces *vns);
+
+extern int ieee80211_radiotap_iterator_next(
+	struct ieee80211_radiotap_iterator *iterator);
+
+#endif /* __RADIOTAP_ITER_H */