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STRUCT IEEE80211_RAD(9) Utility functions STRUCT IEEE80211_RAD(9)

NAME

struct_ieee80211_radiotap_iterator - tracks walk thru present radiotap args

SYNOPSIS

struct ieee80211_radiotap_iterator {
  struct ieee80211_radiotap_header * _rtheader;
  const struct ieee80211_radiotap_vendor_namespaces * _vns;
  const struct ieee80211_radiotap_namespace * current_namespace;
  unsigned char * _arg;
  unsigned char * _next_ns_data;
  __le32 * _next_bitmap;
  unsigned char * this_arg;
  int this_arg_index;
  int this_arg_size;
  int is_radiotap_ns;
  int _max_length;
  int _arg_index;
  uint32_t _bitmap_shifter;
  int _reset_on_ext;
};

MEMBERS

_rtheader
pointer to the radiotap header we are walking through
_vns
vendor namespace definitions
current_namespace
pointer to the current namespace definition (or internally NULL if the current namespace is unknown)
_arg
next argument pointer
_next_ns_data
beginning of the next namespace's data
_next_bitmap
internal pointer to next present u32
this_arg
pointer to current radiotap arg; it is valid after each call to ieee80211_radiotap_iterator_next but also after ieee80211_radiotap_iterator_init where it will point to the beginning of the actual data portion
this_arg_index
index of current arg, valid after each successful call to ieee80211_radiotap_iterator_next
this_arg_size
length of the current arg, for convenience
is_radiotap_ns
indicates whether the current namespace is the default radiotap namespace or not
_max_length
length of radiotap header in cpu byte ordering
_arg_index
next argument index
_bitmap_shifter
internal shifter for curr u32 bitmap, b0 set == arg present
_reset_on_ext
internal; reset the arg index to 0 when going to the next bitmap word

DESCRIPTION

Describes the radiotap parser state. Fields prefixed with an underscore must not be used by users of the parser, only by the parser internally.

AUTHOR

Johannes Berg <johannes@sipsolutions.net>
Author.

COPYRIGHT

January 2017 Kernel Hackers Manual 4.8.