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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * INET An implementation of the TCP/IP protocol suite for the LINUX
3 * operating system. INET is implemented using the BSD Socket
4 * interface as the means of communication with the user level.
5 *
6 * Definitions for the UDP protocol.
7 *
8 * Version: @(#)udp.h 1.0.2 04/28/93
9 *
10 * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 */
17#ifndef _LINUX_UDP_H
18#define _LINUX_UDP_H
19
20#include <linux/types.h>
21
22struct udphdr {
23 __u16 source;
24 __u16 dest;
25 __u16 len;
26 __u16 check;
27};
28
29/* UDP socket options */
30#define UDP_CORK 1 /* Never send partially complete segments */
31#define UDP_ENCAP 100 /* Set the socket to accept encapsulated packets */
32
33/* UDP encapsulation types */
34#define UDP_ENCAP_ESPINUDP_NON_IKE 1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
35#define UDP_ENCAP_ESPINUDP 2 /* draft-ietf-ipsec-udp-encaps-06 */
36
37#ifdef __KERNEL__
38
39#include <linux/config.h>
40#include <net/sock.h>
41#include <linux/ip.h>
42
43struct udp_sock {
44 /* inet_sock has to be the first member */
45 struct inet_sock inet;
46 int pending; /* Any pending frames ? */
47 unsigned int corkflag; /* Cork is required */
48 __u16 encap_type; /* Is this an Encapsulation socket? */
49 /*
50 * Following member retains the infomation to create a UDP header
51 * when the socket is uncorked.
52 */
53 __u16 len; /* total length of pending frames */
54};
55
56static inline struct udp_sock *udp_sk(const struct sock *sk)
57{
58 return (struct udp_sock *)sk;
59}
60
61#endif
62
63#endif /* _LINUX_UDP_H */