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e3acda7ade
Options are as follows: PDU_TYPE:QFI and they refernce to
the fields from the PDU Session Protocol. PDU Session data
is conveyed in GTP-U Extension Header.
GTP-U Extension Header is described in 3GPP TS 29.281.
PDU Session Protocol is described in 3GPP TS 38.415.
PDU_TYPE - indicates the type of the PDU Session Information (4 bits)
QFI - QoS Flow Identifier (6 bits)
# ip link add gtp_dev type gtp role sgsn
# tc qdisc add dev gtp_dev ingress
# tc filter add dev gtp_dev protocol ip parent ffff: \
flower \
enc_key_id 11 \
gtp_opts 1:8/ff:ff \
action mirred egress redirect dev eth0
Signed-off-by: Wojciech Drewek <wojciech.drewek@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
72 lines
1.2 KiB
C
72 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _GTP_H_
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#define _GTP_H_
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/* General GTP protocol related definitions. */
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#define GTP0_PORT 3386
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#define GTP1U_PORT 2152
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/* GTP messages types */
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#define GTP_ECHO_REQ 1 /* Echo Request */
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#define GTP_ECHO_RSP 2 /* Echo Response */
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#define GTP_TPDU 255
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#define GTPIE_RECOVERY 14
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struct gtp0_header { /* According to GSM TS 09.60. */
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__u8 flags;
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__u8 type;
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__be16 length;
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__be16 seq;
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__be16 flow;
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__u8 number;
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__u8 spare[3];
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__be64 tid;
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} __attribute__ ((packed));
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struct gtp1_header { /* According to 3GPP TS 29.060. */
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__u8 flags;
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__u8 type;
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__be16 length;
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__be32 tid;
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} __attribute__ ((packed));
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struct gtp1_header_long { /* According to 3GPP TS 29.060. */
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__u8 flags;
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__u8 type;
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__be16 length;
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__be32 tid;
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__be16 seq;
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__u8 npdu;
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__u8 next;
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} __packed;
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/* GTP Information Element */
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struct gtp_ie {
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__u8 tag;
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__u8 val;
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} __packed;
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struct gtp0_packet {
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struct gtp0_header gtp0_h;
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struct gtp_ie ie;
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} __packed;
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struct gtp1u_packet {
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struct gtp1_header_long gtp1u_h;
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struct gtp_ie ie;
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} __packed;
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struct gtp_pdu_session_info { /* According to 3GPP TS 38.415. */
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u8 pdu_type;
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u8 qfi;
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};
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#define GTP1_F_NPDU 0x01
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#define GTP1_F_SEQ 0x02
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#define GTP1_F_EXTHDR 0x04
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#define GTP1_F_MASK 0x07
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#endif
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