github.com/cilium/cilium@v1.16.2/bpf/include/linux/udp.h (about)

     1  /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
     2  /* Copyright Authors of the Linux kernel */
     3  /*
     4   * INET		An implementation of the TCP/IP protocol suite for the LINUX
     5   *		operating system.  INET is implemented using the  BSD Socket
     6   *		interface as the means of communication with the user level.
     7   *
     8   *		Definitions for the UDP protocol.
     9   *
    10   * Version:	@(#)udp.h	1.0.2	04/28/93
    11   *
    12   * Author:	Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
    13   *
    14   *		This program is free software; you can redistribute it and/or
    15   *		modify it under the terms of the GNU General Public License
    16   *		as published by the Free Software Foundation; either version
    17   *		2 of the License, or (at your option) any later version.
    18   */
    19  #pragma once
    20  
    21  #include <linux/types.h>
    22  
    23  struct 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  
    36  /* UDP encapsulation types */
    37  #define UDP_ENCAP_ESPINUDP_NON_IKE	1 /* draft-ietf-ipsec-nat-t-ike-00/01 */
    38  #define UDP_ENCAP_ESPINUDP	2 /* draft-ietf-ipsec-udp-encaps-06 */
    39  #define UDP_ENCAP_L2TPINUDP	3 /* rfc2661 */