cfg80211: export cfg80211_find_ie

This new function (previously a static function
called just "find_ie" can be used to find a
specific IE in a buffer of IEs.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index c5d16f299d6f..a3f0a7ed31ac 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1658,6 +1658,22 @@ void ieee80211_amsdu_to_8023s(struct sk_buff *skb, struct sk_buff_head *list,
  */
 unsigned int cfg80211_classify8021d(struct sk_buff *skb);
 
+/**
+ * cfg80211_find_ie - find information element in data
+ *
+ * @eid: element ID
+ * @ies: data consisting of IEs
+ * @len: length of data
+ *
+ * This function will return %NULL if the element ID could
+ * not be found or if the element is invalid (claims to be
+ * longer than the given data), or a pointer to the first byte
+ * of the requested element, that is the byte containing the
+ * element ID. There are no checks on the element length
+ * other than having to fit into the given data.
+ */
+const u8 *cfg80211_find_ie(u8 eid, const u8 *ies, int len);
+
 /*
  * Regulatory helper functions for wiphys
  */