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