#include <linux/types.h>
struct udphdr {
- __u16 source;
- __u16 dest;
- __u16 len;
- __u16 check;
+ __be16 source;
+ __be16 dest;
+ __be16 len;
+ __sum16 check;
};
/* UDP socket options */
/* 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 <net/inet_sock.h>
+#include <linux/skbuff.h>
+#include <net/netns/hash.h>
-#include <linux/config.h>
-#include <net/sock.h>
-#include <linux/ip.h>
+static inline struct udphdr *udp_hdr(const struct sk_buff *skb)
+{
+ return (struct udphdr *)skb_transport_header(skb);
+}
+
+#define UDP_HTABLE_SIZE 128
+
+static inline int udp_hashfn(struct net *net, const unsigned num)
+{
+ return (num + net_hash_mix(net)) & (UDP_HTABLE_SIZE - 1);
+}
struct udp_sock {
/* inet_sock has to be the first member */
unsigned int corkflag; /* Cork is required */
__u16 encap_type; /* Is this an Encapsulation socket? */
/*
- * Following member retains the infomation to create a UDP header
+ * Following member retains the information to create a UDP header
* when the socket is uncorked.
*/
__u16 len; /* total length of pending frames */
+ /*
+ * Fields specific to UDP-Lite.
+ */
+ __u16 pcslen;
+ __u16 pcrlen;
+/* indicator bits used by pcflag: */
+#define UDPLITE_BIT 0x1 /* set by udplite proto init function */
+#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)
return (struct udp_sock *)sk;
}
+#define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag)
+
#endif
#endif /* _LINUX_UDP_H */