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 struct gtp_ext_hdr { 82 __u8 len; 83 __u8 data[]; 84 }; 85 86 #endif 87