xref: /openbmc/linux/include/net/gtp.h (revision 949d6b40)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _GTP_H_
3 #define _GTP_H_
4 
5 #include <linux/netdevice.h>
6 #include <linux/types.h>
7 #include <net/rtnetlink.h>
8 
9 /* General GTP protocol related definitions. */
10 
11 #define GTP0_PORT	3386
12 #define GTP1U_PORT	2152
13 
14 /* GTP messages types */
15 #define GTP_ECHO_REQ	1	/* Echo Request */
16 #define GTP_ECHO_RSP	2	/* Echo Response */
17 #define GTP_TPDU	255
18 
19 #define GTPIE_RECOVERY	14
20 
21 struct gtp0_header {	/* According to GSM TS 09.60. */
22 	__u8	flags;
23 	__u8	type;
24 	__be16	length;
25 	__be16	seq;
26 	__be16	flow;
27 	__u8	number;
28 	__u8	spare[3];
29 	__be64	tid;
30 } __attribute__ ((packed));
31 
32 struct gtp1_header {	/* According to 3GPP TS 29.060. */
33 	__u8	flags;
34 	__u8	type;
35 	__be16	length;
36 	__be32	tid;
37 } __attribute__ ((packed));
38 
39 struct gtp1_header_long {	/* According to 3GPP TS 29.060. */
40 	__u8	flags;
41 	__u8	type;
42 	__be16	length;
43 	__be32	tid;
44 	__be16	seq;
45 	__u8	npdu;
46 	__u8	next;
47 } __packed;
48 
49 /* GTP Information Element */
50 struct gtp_ie {
51 	__u8	tag;
52 	__u8	val;
53 } __packed;
54 
55 struct gtp0_packet {
56 	struct gtp0_header gtp0_h;
57 	struct gtp_ie ie;
58 } __packed;
59 
60 struct gtp1u_packet {
61 	struct gtp1_header_long gtp1u_h;
62 	struct gtp_ie ie;
63 } __packed;
64 
65 struct gtp_pdu_session_info {	/* According to 3GPP TS 38.415. */
66 	u8	pdu_type;
67 	u8	qfi;
68 };
69 
netif_is_gtp(const struct net_device * dev)70 static inline bool netif_is_gtp(const struct net_device *dev)
71 {
72 	return dev->rtnl_link_ops &&
73 		!strcmp(dev->rtnl_link_ops->kind, "gtp");
74 }
75 
76 #define GTP1_F_NPDU	0x01
77 #define GTP1_F_SEQ	0x02
78 #define GTP1_F_EXTHDR	0x04
79 #define GTP1_F_MASK	0x07
80 
81 #endif
82