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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.