[IPV4]: introduce nla_get_be32()/NLA_PUT_BE32()

net-endian counterparts of nla_get_u32()/NLA_PUT_U32()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/netlink.h

@@ -831,6 +831,9 @@ static inline int nla_put_msecs(struct sk_buff *skb, int attrtype,
 #define NLA_PUT_U32(skb, attrtype, value) \
 	NLA_PUT_TYPE(skb, u32, attrtype, value)
 
+#define NLA_PUT_BE32(skb, attrtype, value) \
+	NLA_PUT_TYPE(skb, __be32, attrtype, value)
+
 #define NLA_PUT_U64(skb, attrtype, value) \
 	NLA_PUT_TYPE(skb, u64, attrtype, value)
 
@@ -852,6 +855,15 @@ static inline u32 nla_get_u32(struct nlattr *nla)
 	return *(u32 *) nla_data(nla);
 }
 
+/**
+ * nla_get_be32 - return payload of __be32 attribute
+ * @nla: __be32 netlink attribute
+ */
+static inline __be32 nla_get_be32(struct nlattr *nla)
+{
+	return *(__be32 *) nla_data(nla);
+}
+
 /**
  * nla_get_u16 - return payload of u16 attribute
  * @nla: u16 netlink attribute