radiotap_iter.h revision 8d520ff1dc2da35cdca849e982051b86468016d8 
1#ifndef __RADIOTAP_ITER_H
2#define __RADIOTAP_ITER_H
3
4#include "radiotap.h"
5
6/* Radiotap header iteration
7 *   implemented in radiotap.c
8 */
9/**
10 * struct ieee80211_radiotap_iterator - tracks walk thru present radiotap args
11 * @rtheader: pointer to the radiotap header we are walking through
12 * @max_length: length of radiotap header in cpu byte ordering
13 * @this_arg_index: IEEE80211_RADIOTAP_... index of current arg
14 * @this_arg: pointer to current radiotap arg
15 * @arg_index: internal next argument index
16 * @arg: internal next argument pointer
17 * @next_bitmap: internal pointer to next present u32
18 * @bitmap_shifter: internal shifter for curr u32 bitmap, b0 set == arg present
19 */
20
21struct ieee80211_radiotap_iterator {
22	struct ieee80211_radiotap_header *rtheader;
23	int max_length;
24	int this_arg_index;
25	unsigned char *this_arg;
26
27	int arg_index;
28	unsigned char *arg;
29	uint32_t *next_bitmap;
30	uint32_t bitmap_shifter;
31};
32
33extern int ieee80211_radiotap_iterator_init(
34   struct ieee80211_radiotap_iterator *iterator,
35   struct ieee80211_radiotap_header *radiotap_header,
36   int max_length);
37
38extern int ieee80211_radiotap_iterator_next(
39   struct ieee80211_radiotap_iterator *iterator);
40
41#endif /* __RADIOTAP_ITER_H */
42