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authorEliad Peller <eliad@wizery.com>2011-09-15 11:53:01 +0300
committerJohn W. Linville <linville@tuxdriver.com>2011-09-19 15:49:11 -0400
commit0c28ec587a2f061b93a98ac02a53b4152cbe48f4 (patch)
treefa65521de60bc77f44eee5c0314543108f856c9c /net/wireless
parent6e82bc4a5bf3a1ce597324c8667baa6a2ed12604 (diff)
cfg80211: add cfg80211_find_vendor_ie() function
Add function to find vendor-specific ie (along with vendor-specific ie struct definition and P2P OUI values) Signed-off-by: Eliad Peller <eliad@wizery.com> Reviewed-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'net/wireless')
-rw-r--r--net/wireless/scan.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index b0f00396695..0fb14241040 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -228,6 +228,33 @@ const u8 *cfg80211_find_ie(u8 eid, const u8 *ies, int len)
}
EXPORT_SYMBOL(cfg80211_find_ie);
+const u8 *cfg80211_find_vendor_ie(unsigned int oui, u8 oui_type,
+ const u8 *ies, int len)
+{
+ struct ieee80211_vendor_ie *ie;
+ const u8 *pos = ies, *end = ies + len;
+ int ie_oui;
+
+ while (pos < end) {
+ pos = cfg80211_find_ie(WLAN_EID_VENDOR_SPECIFIC, pos,
+ end - pos);
+ if (!pos)
+ return NULL;
+
+ if (end - pos < sizeof(*ie))
+ return NULL;
+
+ ie = (struct ieee80211_vendor_ie *)pos;
+ ie_oui = ie->oui[0] << 16 | ie->oui[1] << 8 | ie->oui[2];
+ if (ie_oui == oui && ie->oui_type == oui_type)
+ return pos;
+
+ pos += 2 + ie->len;
+ }
+ return NULL;
+}
+EXPORT_SYMBOL(cfg80211_find_vendor_ie);
+
static int cmp_ies(u8 num, u8 *ies1, size_t len1, u8 *ies2, size_t len2)
{
const u8 *ie1 = cfg80211_find_ie(num, ies1, len1);