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