1 files changed, 78 insertions, 0 deletions

diff --git a/src/transport/wlan/radiotap-parser.h b/src/transport/wlan/radiotap-parser.h
new file mode 100644
index 000000000..b36037369
--- /dev/null
+++ b/src/transport/wlan/radiotap-parser.h
@@ -0,0 +1,78 @@
+/*
+ *  Copyright (c) 2007, 2008, Andy Green <andy@warmcat.com>
+ *
+ *   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; version 2.
+ *
+ *   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.
+ */
+
+
+#define __user
+#include "byteorder.h"
+#include <stdint.h>
+
+typedef uint64_t u64;
+typedef uint32_t u32;
+typedef uint16_t u16;
+typedef uint8_t u8;
+
+#ifndef unlikely
+#define unlikely(x) (x)
+#endif
+
+#include "ieee80211_radiotap.h"
+
+
+/*
+ * Radiotap header iteration
+ *   implemented in src/radiotap-parser.c
+ *
+ * call __ieee80211_radiotap_iterator_init() to init a semi-opaque iterator
+ * struct ieee80211_radiotap_iterator (no need to init the struct beforehand)
+ * then loop calling __ieee80211_radiotap_iterator_next()... it returns -1
+ * if there are no more args in the header, or the next argument type index
+ * that is present.  The iterator's this_arg member points to the start of the
+ * argument associated with the current argument index that is present,
+ * which can be found in the iterator's this_arg_index member.  This arg
+ * index corresponds to the IEEE80211_RADIOTAP_... defines.
+ */
+/**
+ * struct ieee80211_radiotap_iterator - tracks walk thru present radiotap args
+ * @rtheader: pointer to the radiotap header we are walking through
+ * @max_length: length of radiotap header in cpu byte ordering
+ * @this_arg_index: IEEE80211_RADIOTAP_... index of current arg
+ * @this_arg: pointer to current radiotap arg
+ * @arg_index: internal next argument index
+ * @arg: internal next argument pointer
+ * @next_bitmap: internal pointer to next present u32
+ * @bitmap_shifter: internal shifter for curr u32 bitmap, b0 set == arg present
+ */
+
+struct ieee80211_radiotap_iterator {
+        struct ieee80211_radiotap_header *rtheader;
+        int max_length;
+        int this_arg_index;
+        u8 * this_arg;
+
+        int arg_index;
+        u8 * arg;
+        u32 *next_bitmap;
+        u32 bitmap_shifter;
+};
+
+int ieee80211_radiotap_iterator_init(
+        struct ieee80211_radiotap_iterator * iterator,
+        struct ieee80211_radiotap_header * radiotap_header,
+        int max_length);
+
+int ieee80211_radiotap_iterator_next(
+        struct ieee80211_radiotap_iterator * iterator);