include/uapi/linux/udp.h

   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
  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 */
  40 #define UDP_ENCAP_GTP0          4 /* GSM TS 09.60 */
  41 #define UDP_ENCAP_GTP1U         5 /* 3GPP TS 29.060 */
  42
  43 #endif /* _UAPI_LINUX_UDP_H */