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authorJohannes Berg <johannes@sipsolutions.net>2010-02-03 10:24:30 +0100
committerJohn W. Linville <linville@tuxdriver.com>2010-02-08 16:50:53 -0500
commit33e5a2f776e331dc8a4379b6efb660d38f182d96 (patch)
tree8d89bc3f70063bec4d85d76dc5887cea19da064d /include/net
parent690680360cd22b55235481ca3421a3450a96138a (diff)
wireless: update radiotap parser
Upstream radiotap has adopted the namespace proposal David Young made and I then took care of, for which I had adapted the radiotap parser as a library outside the kernel. This brings the in-kernel parser up to speed. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/cfg80211.h83
-rw-r--r--include/net/ieee80211_radiotap.h4
2 files changed, 68 insertions, 19 deletions
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index a3f0a7ed31a..5b3569b2a74 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1561,37 +1561,82 @@ ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
* Documentation in Documentation/networking/radiotap-headers.txt
*/
+struct radiotap_align_size {
+ uint8_t align:4, size:4;
+};
+
+struct ieee80211_radiotap_namespace {
+ const struct radiotap_align_size *align_size;
+ int n_bits;
+ uint32_t oui;
+ uint8_t subns;
+};
+
+struct ieee80211_radiotap_vendor_namespaces {
+ const struct ieee80211_radiotap_namespace *ns;
+ int n_ns;
+};
+
/**
* 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
+ * @this_arg_index: index of current arg, valid after each successful call
+ * to ieee80211_radiotap_iterator_next()
+ * @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_size: length of the current arg, for convenience
+ * @current_namespace: pointer to the current namespace definition
+ * (or internally %NULL if the current namespace is unknown)
+ * @is_radiotap_ns: indicates whether the current namespace is the default
+ * radiotap namespace or not
+ *
+ * @overrides: override standard radiotap fields
+ * @n_overrides: number of overrides
+ *
+ * @_rtheader: pointer to the radiotap header we are walking through
+ * @_max_length: length of radiotap header in cpu byte ordering
+ * @_arg_index: next argument index
+ * @_arg: next argument pointer
+ * @_next_bitmap: internal pointer to next present u32
+ * @_bitmap_shifter: internal shifter for curr u32 bitmap, b0 set == arg present
+ * @_vns: vendor namespace definitions
+ * @_next_ns_data: beginning of the next namespace's data
+ * @_reset_on_ext: internal; reset the arg index to 0 when going to the
+ * next bitmap word
+ *
+ * Describes the radiotap parser state. Fields prefixed with an underscore
+ * must not be used by users of the parser, only by the parser internally.
*/
struct ieee80211_radiotap_iterator {
- struct ieee80211_radiotap_header *rtheader;
- int max_length;
+ struct ieee80211_radiotap_header *_rtheader;
+ const struct ieee80211_radiotap_vendor_namespaces *_vns;
+ const struct ieee80211_radiotap_namespace *current_namespace;
+
+ unsigned char *_arg, *_next_ns_data;
+ uint32_t *_next_bitmap;
+
+ unsigned char *this_arg;
int this_arg_index;
- u8 *this_arg;
+ int this_arg_size;
- int arg_index;
- u8 *arg;
- __le32 *next_bitmap;
- u32 bitmap_shifter;
+ int is_radiotap_ns;
+
+ int _max_length;
+ int _arg_index;
+ uint32_t _bitmap_shifter;
+ int _reset_on_ext;
};
extern int ieee80211_radiotap_iterator_init(
- struct ieee80211_radiotap_iterator *iterator,
- struct ieee80211_radiotap_header *radiotap_header,
- int max_length);
+ struct ieee80211_radiotap_iterator *iterator,
+ struct ieee80211_radiotap_header *radiotap_header,
+ int max_length, const struct ieee80211_radiotap_vendor_namespaces *vns);
extern int ieee80211_radiotap_iterator_next(
- struct ieee80211_radiotap_iterator *iterator);
+ struct ieee80211_radiotap_iterator *iterator);
+
extern const unsigned char rfc1042_header[6];
extern const unsigned char bridge_tunnel_header[6];
diff --git a/include/net/ieee80211_radiotap.h b/include/net/ieee80211_radiotap.h
index 9d3d86aaccb..af49f8ab7f8 100644
--- a/include/net/ieee80211_radiotap.h
+++ b/include/net/ieee80211_radiotap.h
@@ -198,6 +198,10 @@ enum ieee80211_radiotap_type {
IEEE80211_RADIOTAP_TX_FLAGS = 15,
IEEE80211_RADIOTAP_RTS_RETRIES = 16,
IEEE80211_RADIOTAP_DATA_RETRIES = 17,
+
+ /* valid in every it_present bitmap, even vendor namespaces */
+ IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE = 29,
+ IEEE80211_RADIOTAP_VENDOR_NAMESPACE = 30,
IEEE80211_RADIOTAP_EXT = 31
};