bridge: netlink: add support for multicast_startup_query_count

[cascardo/linux.git] / include / net / mac802154.h

diff --git a/include/net/mac802154.h b/include/net/mac802154.h
index b7f9961..32bd7c0 100644 (file)
--- a/include/net/mac802154.h
+++ b/include/net/mac802154.h
@@ -249,6 +249,21 @@ struct ieee802154_ops {
                                                const bool on);
 };
 
+/**
+ * ieee802154_get_fc_from_skb - get the frame control field from an skb
+ * @skb: skb where the frame control field will be get from
+ */
+static inline __le16 ieee802154_get_fc_from_skb(const struct sk_buff *skb)
+{
+       /* return some invalid fc on failure */
+       if (unlikely(skb->mac_len < 2)) {
+               WARN_ON(1);
+               return cpu_to_le16(0);
+       }
+
+       return (__force __le16)__get_unaligned_memmove16(skb_mac_header(skb));
+}
+
 /**
  * ieee802154_be64_to_le64 - copies and convert be64 to le64
  * @le64_dst: le64 destination pointer