| Jouni Malinen | 75ecf52 | 2011-06-27 15:19:46 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Radiotap parser |
| 3 | * |
| 4 | * Copyright 2007 Andy Green <andy@warmcat.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * Alternatively, this software may be distributed under the terms of BSD |
| 11 | * license. |
| 12 | * |
| 13 | * See README and COPYING for more details. |
| 14 | */ |
| 15 | |
| Dmitry Shmidt | 8d520ff | 2011-05-09 14:06:53 -0700 | [diff] [blame] | 16 | #ifndef __RADIOTAP_ITER_H |
| 17 | #define __RADIOTAP_ITER_H |
| 18 | |
| 19 | #include "radiotap.h" |
| 20 | |
| 21 | /* Radiotap header iteration |
| 22 | * implemented in radiotap.c |
| 23 | */ |
| 24 | /** |
| 25 | * struct ieee80211_radiotap_iterator - tracks walk thru present radiotap args |
| 26 | * @rtheader: pointer to the radiotap header we are walking through |
| 27 | * @max_length: length of radiotap header in cpu byte ordering |
| 28 | * @this_arg_index: IEEE80211_RADIOTAP_... index of current arg |
| 29 | * @this_arg: pointer to current radiotap arg |
| 30 | * @arg_index: internal next argument index |
| 31 | * @arg: internal next argument pointer |
| 32 | * @next_bitmap: internal pointer to next present u32 |
| 33 | * @bitmap_shifter: internal shifter for curr u32 bitmap, b0 set == arg present |
| 34 | */ |
| 35 | |
| 36 | struct ieee80211_radiotap_iterator { |
| 37 | struct ieee80211_radiotap_header *rtheader; |
| 38 | int max_length; |
| 39 | int this_arg_index; |
| 40 | unsigned char *this_arg; |
| 41 | |
| 42 | int arg_index; |
| 43 | unsigned char *arg; |
| 44 | uint32_t *next_bitmap; |
| 45 | uint32_t bitmap_shifter; |
| 46 | }; |
| 47 | |
| 48 | extern int ieee80211_radiotap_iterator_init( |
| 49 | struct ieee80211_radiotap_iterator *iterator, |
| 50 | struct ieee80211_radiotap_header *radiotap_header, |
| 51 | int max_length); |
| 52 | |
| 53 | extern int ieee80211_radiotap_iterator_next( |
| 54 | struct ieee80211_radiotap_iterator *iterator); |
| 55 | |
| 56 | #endif /* __RADIOTAP_ITER_H */ |