contrib/hostapd/hostapd/radiotap_iter.h

   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 */