include/net/gtp.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _GTP_H_
0003 #define _GTP_H_
0004
0005 #include <linux/netdevice.h>
0006 #include <linux/types.h>
0007 #include <net/rtnetlink.h>
0008
0009 /* General GTP protocol related definitions. */
0010
0011 #define GTP0_PORT   3386
0012 #define GTP1U_PORT  2152
0013
0014 /* GTP messages types */
0015 #define GTP_ECHO_REQ    1   /* Echo Request */
0016 #define GTP_ECHO_RSP    2   /* Echo Response */
0017 #define GTP_TPDU    255
0018
0019 #define GTPIE_RECOVERY  14
0020
0021 struct gtp0_header {    /* According to GSM TS 09.60. */
0022     __u8    flags;
0023     __u8    type;
0024     __be16  length;
0025     __be16  seq;
0026     __be16  flow;
0027     __u8    number;
0028     __u8    spare[3];
0029     __be64  tid;
0030 } __attribute__ ((packed));
0031
0032 struct gtp1_header {    /* According to 3GPP TS 29.060. */
0033     __u8    flags;
0034     __u8    type;
0035     __be16  length;
0036     __be32  tid;
0037 } __attribute__ ((packed));
0038
0039 struct gtp1_header_long {   /* According to 3GPP TS 29.060. */
0040     __u8    flags;
0041     __u8    type;
0042     __be16  length;
0043     __be32  tid;
0044     __be16  seq;
0045     __u8    npdu;
0046     __u8    next;
0047 } __packed;
0048
0049 /* GTP Information Element */
0050 struct gtp_ie {
0051     __u8    tag;
0052     __u8    val;
0053 } __packed;
0054
0055 struct gtp0_packet {
0056     struct gtp0_header gtp0_h;
0057     struct gtp_ie ie;
0058 } __packed;
0059
0060 struct gtp1u_packet {
0061     struct gtp1_header_long gtp1u_h;
0062     struct gtp_ie ie;
0063 } __packed;
0064
0065 struct gtp_pdu_session_info {   /* According to 3GPP TS 38.415. */
0066     u8  pdu_type;
0067     u8  qfi;
0068 };
0069
0070 static inline bool netif_is_gtp(const struct net_device *dev)
0071 {
0072     return dev->rtnl_link_ops &&
0073         !strcmp(dev->rtnl_link_ops->kind, "gtp");
0074 }
0075
0076 #define GTP1_F_NPDU 0x01
0077 #define GTP1_F_SEQ  0x02
0078 #define GTP1_F_EXTHDR   0x04
0079 #define GTP1_F_MASK 0x07
0080
0081 #endif