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 
21 struct 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 
33 extern int ieee80211_radiotap_iterator_init(
34    struct ieee80211_radiotap_iterator *iterator,
35    struct ieee80211_radiotap_header *radiotap_header,
36    int max_length);
37 
38 extern int ieee80211_radiotap_iterator_next(
39    struct ieee80211_radiotap_iterator *iterator);
40 
41 #endif /* __RADIOTAP_ITER_H */
42