/* 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 _UAPI_LINUX_UDP_H
#define _UAPI_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 accepting 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 /* unused  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. */
#define UDP_ENCAP_OVPNINUDP     8 /* OpenVPN traffic */

#endif /* _UAPI_LINUX_UDP_H */