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authorJohannes Berg <johannes@sipsolutions.net>2009-07-02 17:18:40 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-07-10 15:01:53 -0400
commit517357c685ccc4b5783cc7dbdae8824ada19a97f (patch)
tree1e3532ca39233dd59b106011788f68a21ffc88c4 /net/wireless/util.c
parent0eb14647fc6b56f73efb28a72ca0c7cc03a653f9 (diff)
cfg80211: assimilate and export ieee80211_bss_get_ie
This function from mac80211 seems generally useful, and I will need it in cfg80211 soon. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless/util.c')
-rw-r--r--net/wireless/util.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/net/wireless/util.c b/net/wireless/util.c
index 25550692dda6..28f8f96801d4 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -502,3 +502,24 @@ unsigned int cfg80211_classify8021d(struct sk_buff *skb)
return dscp >> 5;
}
EXPORT_SYMBOL(cfg80211_classify8021d);
+
+const u8 *ieee80211_bss_get_ie(struct cfg80211_bss *bss, u8 ie)
+{
+ u8 *end, *pos;
+
+ pos = bss->information_elements;
+ if (pos == NULL)
+ return NULL;
+ end = pos + bss->len_information_elements;
+
+ while (pos + 1 < end) {
+ if (pos + 2 + pos[1] > end)
+ break;
+ if (pos[0] == ie)
+ return pos;
+ pos += 2 + pos[1];
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL(ieee80211_bss_get_ie);