blob: 564f3b050105fa1b6c8a162ac38d47964431f360 [file] [log] [blame]
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 {
Al Viro4e7e0c72006-09-27 18:37:19 -070023 __be16 source;
24 __be16 dest;
25 __be16 len;
26 __be16 check;
Linus Torvalds1da177e2005-04-16 15:20:36 -070027};
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__
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020038#include <linux/types.h>
39
40#include <net/inet_sock.h>
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080041#define UDP_HTABLE_SIZE 128
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
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 /*
Adrian Bunk47bdd712006-06-30 18:25:18 +020050 * Following member retains the information to create a UDP header
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 * when the socket is uncorked.
52 */
53 __u16 len; /* total length of pending frames */
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080054 /*
55 * Fields specific to UDP-Lite.
56 */
57 __u16 pcslen;
58 __u16 pcrlen;
59/* indicator bits used by pcflag: */
60#define UDPLITE_BIT 0x1 /* set by udplite proto init function */
61#define UDPLITE_SEND_CC 0x2 /* set via udplite setsockopt */
62#define UDPLITE_RECV_CC 0x4 /* set via udplite setsocktopt */
63 __u8 pcflag; /* marks socket as UDP-Lite if > 0 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070064};
65
66static inline struct udp_sock *udp_sk(const struct sock *sk)
67{
68 return (struct udp_sock *)sk;
69}
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080070#define IS_UDPLITE(__sk) (udp_sk(__sk)->pcflag)
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
72#endif
73
74#endif /* _LINUX_UDP_H */