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authorAndy Green <andy@warmcat.com>2007-07-10 13:29:38 -0400
committerJohn W. Linville <linville@tuxdriver.com>2007-07-12 16:07:24 -0400
commit179f831bc33104d14deb54a52b7a8b43433f8ccc (patch)
tree8834c628a493fbd4aff1e09dc77b334154c6a050 /include/net/cfg80211.h
parent08d1f2155cd5b21bb3848f46d9747afb1ccd249d (diff)
[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/net/cfg80211.h')
-rw-r--r--include/net/cfg80211.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 88171f8ce58a..7edaef6b29d6 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -11,6 +11,44 @@
11 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net> 11 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
12 */ 12 */
13 13
14
15/* Radiotap header iteration
16 * implemented in net/wireless/radiotap.c
17 * docs in Documentation/networking/radiotap-headers.txt
18 */
19/**
20 * struct ieee80211_radiotap_iterator - tracks walk thru present radiotap args
21 * @rtheader: pointer to the radiotap header we are walking through
22 * @max_length: length of radiotap header in cpu byte ordering
23 * @this_arg_index: IEEE80211_RADIOTAP_... index of current arg
24 * @this_arg: pointer to current radiotap arg
25 * @arg_index: internal next argument index
26 * @arg: internal next argument pointer
27 * @next_bitmap: internal pointer to next present u32
28 * @bitmap_shifter: internal shifter for curr u32 bitmap, b0 set == arg present
29 */
30
31struct ieee80211_radiotap_iterator {
32 struct ieee80211_radiotap_header *rtheader;
33 int max_length;
34 int this_arg_index;
35 u8 *this_arg;
36
37 int arg_index;
38 u8 *arg;
39 __le32 *next_bitmap;
40 u32 bitmap_shifter;
41};
42
43extern int ieee80211_radiotap_iterator_init(
44 struct ieee80211_radiotap_iterator *iterator,
45 struct ieee80211_radiotap_header *radiotap_header,
46 int max_length);
47
48extern int ieee80211_radiotap_iterator_next(
49 struct ieee80211_radiotap_iterator *iterator);
50
51
14/* from net/wireless.h */ 52/* from net/wireless.h */
15struct wiphy; 53struct wiphy;
16 54