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-rw-r--r--include/net/gtp.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/include/net/gtp.h b/include/net/gtp.h
new file mode 100644
index 000000000..0e16ebb2a
--- /dev/null
+++ b/include/net/gtp.h
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _GTP_H_
+#define _GTP_H_
+
+/* General GTP protocol related definitions. */
+
+#define GTP0_PORT 3386
+#define GTP1U_PORT 2152
+
+#define GTP_TPDU 255
+
+struct gtp0_header { /* According to GSM TS 09.60. */
+ __u8 flags;
+ __u8 type;
+ __be16 length;
+ __be16 seq;
+ __be16 flow;
+ __u8 number;
+ __u8 spare[3];
+ __be64 tid;
+} __attribute__ ((packed));
+
+struct gtp1_header { /* According to 3GPP TS 29.060. */
+ __u8 flags;
+ __u8 type;
+ __be16 length;
+ __be32 tid;
+} __attribute__ ((packed));
+
+#define GTP1_F_NPDU 0x01
+#define GTP1_F_SEQ 0x02
+#define GTP1_F_EXTHDR 0x04
+#define GTP1_F_MASK 0x07
+
+#endif