1 /* 2 * Radiotap parser 3 * 4 * Copyright 2007 Andy Green <andy (at) 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 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 */ 57
