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 11 struct 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 22 struct 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 35