root/include/net/gtp.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _GTP_H_
   3 #define _GTP_H_
   4 
   5 /* General GTP protocol related definitions. */
   6 
   7 #define GTP0_PORT       3386
   8 #define GTP1U_PORT      2152
   9 
  10 #define GTP_TPDU        255
  11 
  12 struct gtp0_header {    /* According to GSM TS 09.60. */
  13         __u8    flags;
  14         __u8    type;
  15         __be16  length;
  16         __be16  seq;
  17         __be16  flow;
  18         __u8    number;
  19         __u8    spare[3];
  20         __be64  tid;
  21 } __attribute__ ((packed));
  22 
  23 struct gtp1_header {    /* According to 3GPP TS 29.060. */
  24         __u8    flags;
  25         __u8    type;
  26         __be16  length;
  27         __be32  tid;
  28 } __attribute__ ((packed));
  29 
  30 #define GTP1_F_NPDU     0x01
  31 #define GTP1_F_SEQ      0x02
  32 #define GTP1_F_EXTHDR   0x04
  33 #define GTP1_F_MASK     0x07
  34 
  35 #endif