GTPv2-C (`gtpv2`)

Layer: Application and control
Header: variable length
Notes: MACsec / GTPv2-C / Diameter / SIP / RTP (P2)

Reached from

Lower layer	Selector	Value
`udp`	`dst_port` / `src_port`	2123 (0x084b)
`gtpv2`	`p`	1 (at least 8 octets remaining)

Fields

Field	Type	Default	Auto	Description
`version`	`uint(3)`	`2`		GTP version (2).
`p`	`uint(1)`	`0`		P flag: a piggybacked message follows (the next GTPv2-C layer).
`t`	`uint(1)`		Number of items of `teid`	T flag: the TEID field is present (Auto: set when a TEID is given).
`mp`	`uint(1)`	`0`		MP flag: the message priority is present.
`spare`	`uint(2)`	`0`
`message_type`	`enum(8)`	`32` (create_session_request)		Message type (Echo, Create / Modify / Delete Session, Create / Update / Delete Bearer, …).
`message_length`	`uint(16)`		Length of the header in octets (`-4`)	Message length in octets, without the first 4 octets (Auto).
`teid`	`list<uint(32)>` — `t` items	1 items		Tunnel Endpoint Identifier of the receiver (absent in Echo messages; 0 in an initial request).
`sequence_number`	`uint(24)`	`1`		Sequence number (24 bits) matching a response to its request.
`message_priority`	`uint(4)`	`0`		Message priority (0 highest), used when MP is set.
`spare2`	`uint(4)`	`0`
`ies`	`tlv` — up to offset `message_length + 4` of the group	6 items		Information elements (8-bit type, 16-bit length of the data, spare / instance octet): IMSI, Cause, Recovery, APN, AMBR, EBI, IP Address, MEI, MSISDN, PAA, Bearer QoS, RAT Type, Serving Network, F-TEID, Bearer Context (grouped), PDN Type, … Lengths are Auto.

`message_type`

Value	Name
1 (0x01)	`echo_request`
2 (0x02)	`echo_response`
3 (0x03)	`version_not_supported`
32 (0x20)	`create_session_request`
33 (0x21)	`create_session_response`
34 (0x22)	`modify_bearer_request`
35 (0x23)	`modify_bearer_response`
36 (0x24)	`delete_session_request`
37 (0x25)	`delete_session_response`
95 (0x5f)	`create_bearer_request`
96 (0x60)	`create_bearer_response`
97 (0x61)	`update_bearer_request`
98 (0x62)	`update_bearer_response`
99 (0x63)	`delete_bearer_request`
100 (0x64)	`delete_bearer_response`
170 (0xaa)	`release_access_bearers_request`
171 (0xab)	`release_access_bearers_response`
176 (0xb0)	`downlink_data_notification`
177 (0xb1)	`downlink_data_notification_ack`

`ies`

Type 8 bits, length 16 bits.
The length counts the value only.
The first 1 value octets after the length are not counted in it.
Unknown types are kept as raw value octets.

Type	Name	Value fields
1 (0x01)	`imsi`	`spare`, `instance`, `digits`
2 (0x02)	`cause`	`spare`, `instance`, `cause`, `spare2`, `pce`, `bce`, `cs`, `offending_ie`
3 (0x03)	`recovery`	`spare`, `instance`, `restart_counter`
71 (0x47)	`apn`	`spare`, `instance`, `apn`
72 (0x48)	`ambr`	`spare`, `instance`, `uplink`, `downlink`
73 (0x49)	`ebi`	`spare`, `instance`, `spare2`, `ebi`
74 (0x4a)	`ip_address`	`spare`, `instance`, `address`; when the value is 5 octets
74 (0x4a)	`ip_address_ipv6`	`spare`, `instance`, `address`; when the value is 17 octets
75 (0x4b)	`mei`	`spare`, `instance`, `digits`
76 (0x4c)	`msisdn`	`spare`, `instance`, `digits`
77 (0x4d)	`indication`	`spare`, `instance`, `flags`
78 (0x4e)	`pco`	`spare`, `instance`, `data`
79 (0x4f)	`paa`	`spare`, `instance`, `spare2`, `pdn_type`, `ipv4`; when the value is 6 octets
79 (0x4f)	`paa_ipv6`	`spare`, `instance`, `spare2`, `pdn_type`, `ipv6_prefix_length`, `ipv6`; when the value is 19 octets
79 (0x4f)	`paa_ipv4v6`	`spare`, `instance`, `spare2`, `pdn_type`, `ipv6_prefix_length`, `ipv6`, `ipv4`; when the value is 23 octets
80 (0x50)	`bearer_qos`	`spare`, `instance`, `spare2`, `pci`, `pl`, `spare3`, `pvi`, `qci`, `mbr_uplink`, `mbr_downlink`, `gbr_uplink`, `gbr_downlink`
82 (0x52)	`rat_type`	`spare`, `instance`, `rat_type`
83 (0x53)	`serving_network`	`spare`, `instance`, `mcc_digit2`, `mcc_digit1`, `mnc_digit3`, `mcc_digit3`, `mnc_digit2`, `mnc_digit1`
84 (0x54)	`bearer_tft`	`spare`, `instance`, `tft`
86 (0x56)	`uli`	`spare`, `instance`, `data`
87 (0x57)	`fteid`	`spare`, `instance`, `v4`, `v6`, `interface_type`, `teid`, `ipv4`; when the value is 10 octets
87 (0x57)	`fteid_ipv6`	`spare`, `instance`, `v4`, `v6`, `interface_type`, `teid`, `ipv6`; when the value is 22 octets
87 (0x57)	`fteid_ipv4v6`	`spare`, `instance`, `v4`, `v6`, `interface_type`, `teid`, `ipv4`, `ipv6`; when the value is 26 octets
94 (0x5e)	`charging_id`	`spare`, `instance`, `charging_id`
95 (0x5f)	`charging_characteristics`	`spare`, `instance`, `value`
99 (0x63)	`pdn_type`	`spare`, `instance`, `spare2`, `pdn_type`
114 (0x72)	`ue_time_zone`	`spare`, `instance`, `time_zone`, `spare2`, `daylight_saving_time`
127 (0x7f)	`apn_restriction`	`spare`, `instance`, `restriction`
128 (0x80)	`selection_mode`	`spare`, `instance`, `spare2`, `selection_mode`
255 (0xff)	`private_extension`	`spare`, `instance`, `enterprise_id`, `value`
93 (0x5d)	`bearer_context`	`spare`, `instance`, `ies`

`ies` › `imsi`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`digits`	`bytes` — rest of the PDU

`ies` › `cause`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`cause`	`enum(8)`	`16` (request_accepted)
`spare2`	`uint(5)`	`0`
`pce`	`uint(1)`	`0`
`bce`	`uint(1)`	`0`
`cs`	`uint(1)`	`0`
`offending_ie`	`bytes` — rest of the PDU

`ies` › `cause` › `cause`

Value	Name
2 (0x02)	`local_detach`
3 (0x03)	`complete_detach`
4 (0x04)	`rat_changed_from_3gpp_to_non_3gpp`
8 (0x08)	`isr_deactivation`
16 (0x10)	`request_accepted`
17 (0x11)	`request_accepted_partially`
18 (0x12)	`new_pdn_type_due_to_network_preference`
19 (0x13)	`new_pdn_type_due_to_single_address_bearer_only`
64 (0x40)	`context_not_found`
65 (0x41)	`invalid_message_format`
66 (0x42)	`version_not_supported_by_next_peer`
67 (0x43)	`invalid_length`
68 (0x44)	`service_not_supported`
69 (0x45)	`mandatory_ie_incorrect`
70 (0x46)	`mandatory_ie_missing`
72 (0x48)	`system_failure`
73 (0x49)	`no_resources_available`
78 (0x4e)	`missing_or_unknown_apn`
83 (0x53)	`preferred_pdn_type_not_supported`
84 (0x54)	`all_dynamic_addresses_are_occupied`
89 (0x59)	`service_denied`
92 (0x5c)	`user_authentication_failed`
93 (0x5d)	`apn_access_denied_no_subscription`
94 (0x5e)	`request_rejected`
100 (0x64)	`remote_peer_not_responding`
110 (0x6e)	`temporarily_rejected_due_to_handover_in_progress`

`ies` › `recovery`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`restart_counter`	`uint(8)`	`0`

`ies` › `apn`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`apn`	`bytes` — rest of the PDU

`ies` › `ambr`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`uplink`	`uint(32)`	`1000`
`downlink`	`uint(32)`	`1000`

`ies` › `ebi`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(4)`	`0`
`ebi`	`uint(4)`	`5`

`ies` › `ip_address`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`address`	`ipv4`

`ies` › `ip_address_ipv6`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`address`	`ipv6`

`ies` › `mei`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`digits`	`bytes` — rest of the PDU

`ies` › `msisdn`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`digits`	`bytes` — rest of the PDU

`ies` › `indication`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`flags`	`bytes` — rest of the PDU

`ies` › `pco`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`data`	`bytes` — rest of the PDU

`ies` › `paa`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(5)`	`0`
`pdn_type`	`uint(3)`	`1`
`ipv4`	`ipv4`

`ies` › `paa_ipv6`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(5)`	`0`
`pdn_type`	`uint(3)`	`2`
`ipv6_prefix_length`	`uint(8)`	`64`
`ipv6`	`ipv6`	`::`

`ies` › `paa_ipv4v6`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(5)`	`0`
`pdn_type`	`uint(3)`	`3`
`ipv6_prefix_length`	`uint(8)`	`64`
`ipv6`	`ipv6`	`::`
`ipv4`	`ipv4`

`ies` › `bearer_qos`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(1)`	`0`
`pci`	`uint(1)`	`0`
`pl`	`uint(4)`	`15`
`spare3`	`uint(1)`	`0`
`pvi`	`uint(1)`	`0`
`qci`	`uint(8)`	`9`
`mbr_uplink`	`uint(40)`	`0`
`mbr_downlink`	`uint(40)`	`0`
`gbr_uplink`	`uint(40)`	`0`
`gbr_downlink`	`uint(40)`	`0`

`ies` › `rat_type`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`rat_type`	`enum(8)`	`6` (eutran)

`ies` › `rat_type` › `rat_type`

Value	Name
1 (0x01)	`utran`
2 (0x02)	`geran`
3 (0x03)	`wlan`
4 (0x04)	`gan`
5 (0x05)	`hspa_evolution`
6 (0x06)	`eutran`
7 (0x07)	`virtual`
8 (0x08)	`eutran_nb_iot`
9 (0x09)	`lte_m`
10 (0x0a)	`nr`

`ies` › `serving_network`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`mcc_digit2`	`uint(4)`	`0`
`mcc_digit1`	`uint(4)`	`0`
`mnc_digit3`	`uint(4)`	`15`
`mcc_digit3`	`uint(4)`	`1`
`mnc_digit2`	`uint(4)`	`1`
`mnc_digit1`	`uint(4)`	`0`

`ies` › `bearer_tft`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`tft`	`bytes` — rest of the PDU

`ies` › `uli`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`data`	`bytes` — rest of the PDU

`ies` › `fteid`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`v4`	`uint(1)`	`1`
`v6`	`uint(1)`	`0`
`interface_type`	`enum(6)`	`10` (s11_mme_gtp_c)
`teid`	`uint(32)`	`1`
`ipv4`	`ipv4`	`192.0.2.1`

`ies` › `fteid` › `interface_type`

Value	Name
0	`s1_u_enodeb_gtp_u`
1	`s1_u_sgw_gtp_u`
2	`s12_rnc_gtp_u`
3	`s12_sgw_gtp_u`
4	`s5_s8_sgw_gtp_u`
5	`s5_s8_pgw_gtp_u`
6	`s5_s8_sgw_gtp_c`
7	`s5_s8_pgw_gtp_c`
10	`s11_mme_gtp_c`
11	`s11_s4_sgw_gtp_c`
16	`s2b_epdg_gtp_c`
17	`s2b_u_epdg_gtp_u`
18	`s2b_pgw_gtp_c`
19	`s2b_u_pgw_gtp_u`

`ies` › `fteid_ipv6`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`v4`	`uint(1)`	`0`
`v6`	`uint(1)`	`1`
`interface_type`	`enum(6)`	`10` (s11_mme_gtp_c)
`teid`	`uint(32)`	`1`
`ipv6`	`ipv6`	`2001:db8::1`

`ies` › `fteid_ipv6` › `interface_type`

Value	Name
0	`s1_u_enodeb_gtp_u`
1	`s1_u_sgw_gtp_u`
2	`s12_rnc_gtp_u`
3	`s12_sgw_gtp_u`
4	`s5_s8_sgw_gtp_u`
5	`s5_s8_pgw_gtp_u`
6	`s5_s8_sgw_gtp_c`
7	`s5_s8_pgw_gtp_c`
10	`s11_mme_gtp_c`
11	`s11_s4_sgw_gtp_c`
16	`s2b_epdg_gtp_c`
17	`s2b_u_epdg_gtp_u`
18	`s2b_pgw_gtp_c`
19	`s2b_u_pgw_gtp_u`

`ies` › `fteid_ipv4v6`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`v4`	`uint(1)`	`1`
`v6`	`uint(1)`	`1`
`interface_type`	`enum(6)`	`10` (s11_mme_gtp_c)
`teid`	`uint(32)`	`1`
`ipv4`	`ipv4`	`192.0.2.1`
`ipv6`	`ipv6`	`2001:db8::1`

`ies` › `fteid_ipv4v6` › `interface_type`

Value	Name
0	`s1_u_enodeb_gtp_u`
1	`s1_u_sgw_gtp_u`
2	`s12_rnc_gtp_u`
3	`s12_sgw_gtp_u`
4	`s5_s8_sgw_gtp_u`
5	`s5_s8_pgw_gtp_u`
6	`s5_s8_sgw_gtp_c`
7	`s5_s8_pgw_gtp_c`
10	`s11_mme_gtp_c`
11	`s11_s4_sgw_gtp_c`
16	`s2b_epdg_gtp_c`
17	`s2b_u_epdg_gtp_u`
18	`s2b_pgw_gtp_c`
19	`s2b_u_pgw_gtp_u`

`ies` › `charging_id`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`charging_id`	`uint(32)`	`1`

`ies` › `charging_characteristics`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`value`	`uint(16)`	`2048`

`ies` › `pdn_type`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(5)`	`0`
`pdn_type`	`enum(3)`	`1` (ipv4)

`ies` › `pdn_type` › `pdn_type`

Value	Name
1	`ipv4`
2	`ipv6`
3	`ipv4v6`
4	`non_ip`
5	`ethernet`

`ies` › `ue_time_zone`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`time_zone`	`uint(8)`	`0`
`spare2`	`uint(6)`	`0`
`daylight_saving_time`	`uint(2)`	`0`

`ies` › `apn_restriction`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`restriction`	`uint(8)`	`0`

`ies` › `selection_mode`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(6)`	`0`
`selection_mode`	`uint(2)`	`0`

`ies` › `private_extension`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`enterprise_id`	`uint(16)`	`0`
`value`	`bytes` — rest of the PDU

`ies` › `bearer_context`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`ies`	`tlv` — rest of the PDU	1 items

`ies` › `bearer_context` › `ies`

Type 8 bits, length 16 bits.
The length counts the value only.
The first 1 value octets after the length are not counted in it.
Unknown types are kept as raw value octets.

Type	Name	Value fields
1 (0x01)	`imsi`	`spare`, `instance`, `digits`
2 (0x02)	`cause`	`spare`, `instance`, `cause`, `spare2`, `pce`, `bce`, `cs`, `offending_ie`
3 (0x03)	`recovery`	`spare`, `instance`, `restart_counter`
71 (0x47)	`apn`	`spare`, `instance`, `apn`
72 (0x48)	`ambr`	`spare`, `instance`, `uplink`, `downlink`
73 (0x49)	`ebi`	`spare`, `instance`, `spare2`, `ebi`
74 (0x4a)	`ip_address`	`spare`, `instance`, `address`; when the value is 5 octets
74 (0x4a)	`ip_address_ipv6`	`spare`, `instance`, `address`; when the value is 17 octets
75 (0x4b)	`mei`	`spare`, `instance`, `digits`
76 (0x4c)	`msisdn`	`spare`, `instance`, `digits`
77 (0x4d)	`indication`	`spare`, `instance`, `flags`
78 (0x4e)	`pco`	`spare`, `instance`, `data`
79 (0x4f)	`paa`	`spare`, `instance`, `spare2`, `pdn_type`, `ipv4`; when the value is 6 octets
79 (0x4f)	`paa_ipv6`	`spare`, `instance`, `spare2`, `pdn_type`, `ipv6_prefix_length`, `ipv6`; when the value is 19 octets
79 (0x4f)	`paa_ipv4v6`	`spare`, `instance`, `spare2`, `pdn_type`, `ipv6_prefix_length`, `ipv6`, `ipv4`; when the value is 23 octets
80 (0x50)	`bearer_qos`	`spare`, `instance`, `spare2`, `pci`, `pl`, `spare3`, `pvi`, `qci`, `mbr_uplink`, `mbr_downlink`, `gbr_uplink`, `gbr_downlink`
82 (0x52)	`rat_type`	`spare`, `instance`, `rat_type`
83 (0x53)	`serving_network`	`spare`, `instance`, `mcc_digit2`, `mcc_digit1`, `mnc_digit3`, `mcc_digit3`, `mnc_digit2`, `mnc_digit1`
84 (0x54)	`bearer_tft`	`spare`, `instance`, `tft`
86 (0x56)	`uli`	`spare`, `instance`, `data`
87 (0x57)	`fteid`	`spare`, `instance`, `v4`, `v6`, `interface_type`, `teid`, `ipv4`; when the value is 10 octets
87 (0x57)	`fteid_ipv6`	`spare`, `instance`, `v4`, `v6`, `interface_type`, `teid`, `ipv6`; when the value is 22 octets
87 (0x57)	`fteid_ipv4v6`	`spare`, `instance`, `v4`, `v6`, `interface_type`, `teid`, `ipv4`, `ipv6`; when the value is 26 octets
94 (0x5e)	`charging_id`	`spare`, `instance`, `charging_id`
95 (0x5f)	`charging_characteristics`	`spare`, `instance`, `value`
99 (0x63)	`pdn_type`	`spare`, `instance`, `spare2`, `pdn_type`
114 (0x72)	`ue_time_zone`	`spare`, `instance`, `time_zone`, `spare2`, `daylight_saving_time`
127 (0x7f)	`apn_restriction`	`spare`, `instance`, `restriction`
128 (0x80)	`selection_mode`	`spare`, `instance`, `spare2`, `selection_mode`
255 (0xff)	`private_extension`	`spare`, `instance`, `enterprise_id`, `value`

`ies` › `bearer_context` › `ies` › `imsi`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`digits`	`bytes` — rest of the PDU

`ies` › `bearer_context` › `ies` › `cause`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`cause`	`enum(8)`	`16` (request_accepted)
`spare2`	`uint(5)`	`0`
`pce`	`uint(1)`	`0`
`bce`	`uint(1)`	`0`
`cs`	`uint(1)`	`0`
`offending_ie`	`bytes` — rest of the PDU

ies › bearer_context › ies › cause › cause

Value	Name
2 (0x02)	`local_detach`
3 (0x03)	`complete_detach`
4 (0x04)	`rat_changed_from_3gpp_to_non_3gpp`
8 (0x08)	`isr_deactivation`
16 (0x10)	`request_accepted`
17 (0x11)	`request_accepted_partially`
18 (0x12)	`new_pdn_type_due_to_network_preference`
19 (0x13)	`new_pdn_type_due_to_single_address_bearer_only`
64 (0x40)	`context_not_found`
65 (0x41)	`invalid_message_format`
66 (0x42)	`version_not_supported_by_next_peer`
67 (0x43)	`invalid_length`
68 (0x44)	`service_not_supported`
69 (0x45)	`mandatory_ie_incorrect`
70 (0x46)	`mandatory_ie_missing`
72 (0x48)	`system_failure`
73 (0x49)	`no_resources_available`
78 (0x4e)	`missing_or_unknown_apn`
83 (0x53)	`preferred_pdn_type_not_supported`
84 (0x54)	`all_dynamic_addresses_are_occupied`
89 (0x59)	`service_denied`
92 (0x5c)	`user_authentication_failed`
93 (0x5d)	`apn_access_denied_no_subscription`
94 (0x5e)	`request_rejected`
100 (0x64)	`remote_peer_not_responding`
110 (0x6e)	`temporarily_rejected_due_to_handover_in_progress`

`ies` › `bearer_context` › `ies` › `recovery`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`restart_counter`	`uint(8)`	`0`

`ies` › `bearer_context` › `ies` › `apn`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`apn`	`bytes` — rest of the PDU

`ies` › `bearer_context` › `ies` › `ambr`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`uplink`	`uint(32)`	`1000`
`downlink`	`uint(32)`	`1000`

`ies` › `bearer_context` › `ies` › `ebi`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(4)`	`0`
`ebi`	`uint(4)`	`5`

`ies` › `bearer_context` › `ies` › `ip_address`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`address`	`ipv4`

`ies` › `bearer_context` › `ies` › `ip_address_ipv6`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`address`	`ipv6`

`ies` › `bearer_context` › `ies` › `mei`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`digits`	`bytes` — rest of the PDU

`ies` › `bearer_context` › `ies` › `msisdn`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`digits`	`bytes` — rest of the PDU

`ies` › `bearer_context` › `ies` › `indication`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`flags`	`bytes` — rest of the PDU

`ies` › `bearer_context` › `ies` › `pco`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`data`	`bytes` — rest of the PDU

`ies` › `bearer_context` › `ies` › `paa`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(5)`	`0`
`pdn_type`	`uint(3)`	`1`
`ipv4`	`ipv4`

`ies` › `bearer_context` › `ies` › `paa_ipv6`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(5)`	`0`
`pdn_type`	`uint(3)`	`2`
`ipv6_prefix_length`	`uint(8)`	`64`
`ipv6`	`ipv6`	`::`

`ies` › `bearer_context` › `ies` › `paa_ipv4v6`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(5)`	`0`
`pdn_type`	`uint(3)`	`3`
`ipv6_prefix_length`	`uint(8)`	`64`
`ipv6`	`ipv6`	`::`
`ipv4`	`ipv4`

`ies` › `bearer_context` › `ies` › `bearer_qos`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(1)`	`0`
`pci`	`uint(1)`	`0`
`pl`	`uint(4)`	`15`
`spare3`	`uint(1)`	`0`
`pvi`	`uint(1)`	`0`
`qci`	`uint(8)`	`9`
`mbr_uplink`	`uint(40)`	`0`
`mbr_downlink`	`uint(40)`	`0`
`gbr_uplink`	`uint(40)`	`0`
`gbr_downlink`	`uint(40)`	`0`

`ies` › `bearer_context` › `ies` › `rat_type`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`rat_type`	`enum(8)`	`6` (eutran)

ies › bearer_context › ies › rat_type › rat_type

Value	Name
1 (0x01)	`utran`
2 (0x02)	`geran`
3 (0x03)	`wlan`
4 (0x04)	`gan`
5 (0x05)	`hspa_evolution`
6 (0x06)	`eutran`
7 (0x07)	`virtual`
8 (0x08)	`eutran_nb_iot`
9 (0x09)	`lte_m`
10 (0x0a)	`nr`

`ies` › `bearer_context` › `ies` › `serving_network`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`mcc_digit2`	`uint(4)`	`0`
`mcc_digit1`	`uint(4)`	`0`
`mnc_digit3`	`uint(4)`	`15`
`mcc_digit3`	`uint(4)`	`1`
`mnc_digit2`	`uint(4)`	`1`
`mnc_digit1`	`uint(4)`	`0`

`ies` › `bearer_context` › `ies` › `bearer_tft`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`tft`	`bytes` — rest of the PDU

`ies` › `bearer_context` › `ies` › `uli`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`data`	`bytes` — rest of the PDU

`ies` › `bearer_context` › `ies` › `fteid`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`v4`	`uint(1)`	`1`
`v6`	`uint(1)`	`0`
`interface_type`	`enum(6)`	`10` (s11_mme_gtp_c)
`teid`	`uint(32)`	`1`
`ipv4`	`ipv4`	`192.0.2.1`

ies › bearer_context › ies › fteid › interface_type

Value	Name
0	`s1_u_enodeb_gtp_u`
1	`s1_u_sgw_gtp_u`
2	`s12_rnc_gtp_u`
3	`s12_sgw_gtp_u`
4	`s5_s8_sgw_gtp_u`
5	`s5_s8_pgw_gtp_u`
6	`s5_s8_sgw_gtp_c`
7	`s5_s8_pgw_gtp_c`
10	`s11_mme_gtp_c`
11	`s11_s4_sgw_gtp_c`
16	`s2b_epdg_gtp_c`
17	`s2b_u_epdg_gtp_u`
18	`s2b_pgw_gtp_c`
19	`s2b_u_pgw_gtp_u`

`ies` › `bearer_context` › `ies` › `fteid_ipv6`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`v4`	`uint(1)`	`0`
`v6`	`uint(1)`	`1`
`interface_type`	`enum(6)`	`10` (s11_mme_gtp_c)
`teid`	`uint(32)`	`1`
`ipv6`	`ipv6`	`2001:db8::1`

ies › bearer_context › ies › fteid_ipv6 › interface_type

Value	Name
0	`s1_u_enodeb_gtp_u`
1	`s1_u_sgw_gtp_u`
2	`s12_rnc_gtp_u`
3	`s12_sgw_gtp_u`
4	`s5_s8_sgw_gtp_u`
5	`s5_s8_pgw_gtp_u`
6	`s5_s8_sgw_gtp_c`
7	`s5_s8_pgw_gtp_c`
10	`s11_mme_gtp_c`
11	`s11_s4_sgw_gtp_c`
16	`s2b_epdg_gtp_c`
17	`s2b_u_epdg_gtp_u`
18	`s2b_pgw_gtp_c`
19	`s2b_u_pgw_gtp_u`

`ies` › `bearer_context` › `ies` › `fteid_ipv4v6`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`v4`	`uint(1)`	`1`
`v6`	`uint(1)`	`1`
`interface_type`	`enum(6)`	`10` (s11_mme_gtp_c)
`teid`	`uint(32)`	`1`
`ipv4`	`ipv4`	`192.0.2.1`
`ipv6`	`ipv6`	`2001:db8::1`

ies › bearer_context › ies › fteid_ipv4v6 › interface_type

Value	Name
0	`s1_u_enodeb_gtp_u`
1	`s1_u_sgw_gtp_u`
2	`s12_rnc_gtp_u`
3	`s12_sgw_gtp_u`
4	`s5_s8_sgw_gtp_u`
5	`s5_s8_pgw_gtp_u`
6	`s5_s8_sgw_gtp_c`
7	`s5_s8_pgw_gtp_c`
10	`s11_mme_gtp_c`
11	`s11_s4_sgw_gtp_c`
16	`s2b_epdg_gtp_c`
17	`s2b_u_epdg_gtp_u`
18	`s2b_pgw_gtp_c`
19	`s2b_u_pgw_gtp_u`

`ies` › `bearer_context` › `ies` › `charging_id`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`charging_id`	`uint(32)`	`1`

`ies` › `bearer_context` › `ies` › `charging_characteristics`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`value`	`uint(16)`	`2048`

`ies` › `bearer_context` › `ies` › `pdn_type`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(5)`	`0`
`pdn_type`	`enum(3)`	`1` (ipv4)

ies › bearer_context › ies › pdn_type › pdn_type

Value	Name
1	`ipv4`
2	`ipv6`
3	`ipv4v6`
4	`non_ip`
5	`ethernet`

`ies` › `bearer_context` › `ies` › `ue_time_zone`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`time_zone`	`uint(8)`	`0`
`spare2`	`uint(6)`	`0`
`daylight_saving_time`	`uint(2)`	`0`

`ies` › `bearer_context` › `ies` › `apn_restriction`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`restriction`	`uint(8)`	`0`

`ies` › `bearer_context` › `ies` › `selection_mode`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`spare2`	`uint(6)`	`0`
`selection_mode`	`uint(2)`	`0`

`ies` › `bearer_context` › `ies` › `private_extension`

Field	Type	Default
`spare`	`uint(4)`	`0`
`instance`	`uint(4)`	`0`
`enterprise_id`	`uint(16)`	`0`
`value`	`bytes` — rest of the PDU

Next layer

The next layer is selected by p; when the field is Auto the builder writes the value of the protocol stacked above.

Value	Protocol	Note
1	`gtpv2`	at least 8 octets remaining

Constraints

Level	Rule
warning	`version` = 2
error	header at least 8 octets

Sample templates

gtpv2-create-session-request — templates/protocols/mobile/gtpv2-create-session-request.wpg.yaml
gtpv2-create-session-response — templates/protocols/mobile/gtpv2-create-session-response.wpg.yaml
gtpv2-echo-request — templates/protocols/mobile/gtpv2-echo-request.wpg.yaml

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