diff options
author | Andy Green <andy@warmcat.com> | 2007-07-10 19:29:38 +0200 |
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committer | John W. Linville <linville@tuxdriver.com> | 2007-07-12 16:07:24 -0400 |
commit | 179f831bc33104d14deb54a52b7a8b43433f8ccc (patch) | |
tree | 8834c628a493fbd4aff1e09dc77b334154c6a050 /include | |
parent | 08d1f2155cd5b21bb3848f46d9747afb1ccd249d (diff) | |
download | op-kernel-dev-179f831bc33104d14deb54a52b7a8b43433f8ccc.zip op-kernel-dev-179f831bc33104d14deb54a52b7a8b43433f8ccc.tar.gz |
[PATCH] cfg80211: Radiotap parser
Generic code to walk through the fields in a radiotap header, accounting
for nasties like extended "field present" bitfields and alignment rules
Signed-off-by: Andy Green <andy@warmcat.com>
Signed-off-by: Jiri Benc <jbenc@suse.cz>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'include')
-rw-r--r-- | include/net/cfg80211.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 88171f8..7edaef6 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -11,6 +11,44 @@ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> */ + +/* Radiotap header iteration + * implemented in net/wireless/radiotap.c + * docs in Documentation/networking/radiotap-headers.txt + */ +/** + * struct ieee80211_radiotap_iterator - tracks walk thru present radiotap args + * @rtheader: pointer to the radiotap header we are walking through + * @max_length: length of radiotap header in cpu byte ordering + * @this_arg_index: IEEE80211_RADIOTAP_... index of current arg + * @this_arg: pointer to current radiotap arg + * @arg_index: internal next argument index + * @arg: internal next argument pointer + * @next_bitmap: internal pointer to next present u32 + * @bitmap_shifter: internal shifter for curr u32 bitmap, b0 set == arg present + */ + +struct ieee80211_radiotap_iterator { + struct ieee80211_radiotap_header *rtheader; + int max_length; + int this_arg_index; + u8 *this_arg; + + int arg_index; + u8 *arg; + __le32 *next_bitmap; + u32 bitmap_shifter; +}; + +extern int ieee80211_radiotap_iterator_init( + struct ieee80211_radiotap_iterator *iterator, + struct ieee80211_radiotap_header *radiotap_header, + int max_length); + +extern int ieee80211_radiotap_iterator_next( + struct ieee80211_radiotap_iterator *iterator); + + /* from net/wireless.h */ struct wiphy; |