/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */

/*

 * INET		An implementation of the TCP/IP protocol suite for the LINUX

 *		operating system.  INET is implemented using the  BSD Socket

 *		interface as the means of communication with the user level.

 *

 *		Definitions for the UDP protocol.

 *

 * Version:	@(#)udp.h	1.0.2	04/28/93

 *

 * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>

 *

 *		This program is free software; you can redistribute it and/or

 *		modify it under the terms of the GNU General Public License

 *		as published by the Free Software Foundation; either version

 *		2 of the License, or (at your option) any later version.

 */

#ifndef _LINUX_UDP_H

#define _LINUX_UDP_H

#include <linux/types.h>

struct udphdr {

	__be16	source;

	__be16	dest;

	__be16	len;

	__sum16	check;

};

/* UDP socket options */

#define UDP_CORK	1	/* Never send partially complete segments */

#define UDP_ENCAP	100	/* Set the socket to accept encapsulated packets */

#define UDP_NO_CHECK6_TX 101	/* Disable sending checksum for UDP6X */

#define UDP_NO_CHECK6_RX 102	/* Disable accpeting checksum for UDP6 */

#define UDP_SEGMENT	103	/* Set GSO segmentation size */

#define UDP_GRO		104	/* This socket can receive UDP GRO 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 */

#define UDP_ENCAP_GTP0		4 /* GSM TS 09.60 */

#define UDP_ENCAP_GTP1U		5 /* 3GPP TS 29.060 */

#define UDP_ENCAP_RXRPC		6

#define TCP_ENCAP_ESPINTCP	7 /* Yikes, this is really xfrm encap types. */

#endif /* _LINUX_UDP_H */