1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _GTP_H_
 3#define _GTP_H_
 4
 5/* General GTP protocol related definitions. */
 6
 7#define GTP0_PORT	3386
 8#define GTP1U_PORT	2152
 9
10#define GTP_TPDU	255
11
12struct gtp0_header {	/* According to GSM TS 09.60. */
13	__u8	flags;
14	__u8	type;
15	__be16	length;
16	__be16	seq;
17	__be16	flow;
18	__u8	number;
19	__u8	spare[3];
20	__be64	tid;
21} __attribute__ ((packed));
22
23struct gtp1_header {	/* According to 3GPP TS 29.060. */
24	__u8	flags;
25	__u8	type;
26	__be16	length;
27	__be32	tid;
28} __attribute__ ((packed));
29
30#define GTP1_F_NPDU	0x01
31#define GTP1_F_SEQ	0x02
32#define GTP1_F_EXTHDR	0x04
33#define GTP1_F_MASK	0x07
34
35#endif