__be16 source;
__be16 dest;
__be16 len;
- __be16 check;
+ __sum16 check;
};
+#ifdef __KERNEL__
+#include <linux/skbuff.h>
+
+static inline struct udphdr *udp_hdr(const struct sk_buff *skb)
+{
+ return (struct udphdr *)skb_transport_header(skb);
+}
+#endif
+
/* UDP socket options */
#define UDP_CORK 1 /* Never send partially complete segments */
#define UDP_ENCAP 100 /* Set the socket to accept encapsulated packets */
/* UDP encapsulation types */
#define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
#define UDP_ENCAP_ESPINUDP 2 /* draft-ietf-ipsec-udp-encaps-06 */
+#define UDP_ENCAP_L2TPINUDP 3 /* rfc2661 */
#ifdef __KERNEL__
#include <linux/types.h>
#define UDPLITE_SEND_CC 0x2 /* set via udplite setsockopt */
#define UDPLITE_RECV_CC 0x4 /* set via udplite setsocktopt */
__u8 pcflag; /* marks socket as UDP-Lite if > 0 */
+ __u8 unused[3];
+ /*
+ * For encapsulation sockets.
+ */
+ int (*encap_rcv)(struct sock *sk, struct sk_buff *skb);
};
static inline struct udp_sock *udp_sk(const struct sock *sk)