1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2/*
3 * INET		An implementation of the TCP/IP protocol suite for the LINUX
4 *		operating system.  INET is implemented using the  BSD Socket
5 *		interface as the means of communication with the user level.
6 *
7 *		Definitions for the UDP protocol.
8 *
9 * Version:	@(#)udp.h	1.0.2	04/28/93
10 *
11 * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12 *
13 *		This program is free software; you can redistribute it and/or
14 *		modify it under the terms of the GNU General Public License
15 *		as published by the Free Software Foundation; either version
16 *		2 of the License, or (at your option) any later version.
17 */
18#ifndef _UAPI_LINUX_UDP_H
19#define _UAPI_LINUX_UDP_H
20
21#include <linux/types.h>
22
23struct udphdr {
24	__be16	source;
25	__be16	dest;
26	__be16	len;
27	__sum16	check;
28};
29
30/* UDP socket options */
31#define UDP_CORK	1	/* Never send partially complete segments */
32#define UDP_ENCAP	100	/* Set the socket to accept encapsulated packets */
33#define UDP_NO_CHECK6_TX 101	/* Disable sending checksum for UDP6X */
34#define UDP_NO_CHECK6_RX 102	/* Disable accpeting checksum for UDP6 */
35#define UDP_SEGMENT	103	/* Set GSO segmentation size */
36#define UDP_GRO		104	/* This socket can receive UDP GRO packets */
37
38/* UDP encapsulation types */
39#define UDP_ENCAP_ESPINUDP_NON_IKE	1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
40#define UDP_ENCAP_ESPINUDP	2 /* draft-ietf-ipsec-udp-encaps-06 */
41#define UDP_ENCAP_L2TPINUDP	3 /* rfc2661 */
42#define UDP_ENCAP_GTP0		4 /* GSM TS 09.60 */
43#define UDP_ENCAP_GTP1U		5 /* 3GPP TS 29.060 */
44#define UDP_ENCAP_RXRPC		6
45#define TCP_ENCAP_ESPINTCP	7 /* Yikes, this is really xfrm encap types. */
46
47#endif /* _UAPI_LINUX_UDP_H */
48