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61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
#include "ieee80211_radiotap.h"
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// -----ieee80211_radiotap_iterator from cfg80211.h ----- //
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/**
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* struct ieee80211_radiotap_iterator - tracks walk thru present radiotap args
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* @this_arg_index: index of current arg, valid after each successful call
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* to ieee80211_radiotap_iterator_next()
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* @this_arg: pointer to current radiotap arg; it is valid after each
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* call to ieee80211_radiotap_iterator_next() but also after
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* ieee80211_radiotap_iterator_init() where it will point to
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* the beginning of the actual data portion
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* @this_arg_size: length of the current arg, for convenience
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* @current_namespace: pointer to the current namespace definition
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* (or internally %NULL if the current namespace is unknown)
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* @is_radiotap_ns: indicates whether the current namespace is the default
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* radiotap namespace or not
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*
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* @_rtheader: pointer to the radiotap header we are walking through
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* @_max_length: length of radiotap header in cpu byte ordering
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* @_arg_index: next argument index
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* @_arg: next argument pointer
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* @_next_bitmap: internal pointer to next present u32
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* @_bitmap_shifter: internal shifter for curr u32 bitmap, b0 set == arg present
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* @_vns: vendor namespace definitions
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* @_next_ns_data: beginning of the next namespace's data
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* @_reset_on_ext: internal; reset the arg index to 0 when going to the
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* next bitmap word
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*
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* Describes the radiotap parser state. Fields prefixed with an underscore
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* must not be used by users of the parser, only by the parser internally.
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*/
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struct ieee80211_radiotap_iterator {
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struct ieee80211_radiotap_header *_rtheader;
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const struct ieee80211_radiotap_vendor_namespaces *_vns;
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const struct ieee80211_radiotap_namespace *current_namespace;
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unsigned char *_arg, *_next_ns_data;
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__le32 *_next_bitmap;
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unsigned char *this_arg;
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int this_arg_index;
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int this_arg_size;
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int is_radiotap_ns;
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int _max_length;
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int _arg_index;
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uint32_t _bitmap_shifter;
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int _reset_on_ext;
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};
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extern int ieee80211_radiotap_iterator_init(
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struct ieee80211_radiotap_iterator *iterator,
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struct ieee80211_radiotap_header *radiotap_header,
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int max_length, const struct ieee80211_radiotap_vendor_namespaces *vns);
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extern int ieee80211_radiotap_iterator_next(
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struct ieee80211_radiotap_iterator *iterator);
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