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Refactor tunnel endpoint struct members in pdu_session_t

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Motivation:
Clarify the role of GTP tunnel endpoint IDs in PDU session handling. Previously,
the struct members (gNB_teid_N3, UPF_teid_N3, etc.) were confusingly named and
duplicated with separate transport-layer address fields.
This refactoring replaces these with explicit n3_incoming and n3_outgoing members using
gtpu_tunnel_t. This aligns with GTP conventions: "incoming TEID" refers to the
TEID received from the remote peer (UPF on N3), while "outgoing TEID" is the
TEID sent by the local entity (NG-RAN on N3) to the remote peer.

Benefits:
* Improves readability and clarity of the code
* Reduces redundant struct members, i.e. remove UPF_teid_N3, UPF_addr_N3
* Aligns naming with 3GPP conventions for transport layer tunnels

Changes:
* Replace gtp_addr_N3, gNB_teid_N3, gtp_teid, upf_addr with n3_incoming and n3_outgoing
* Update all related code to use the new struct members
* Aligns naming with 3GPP conventions for transport layer tunnels
This commit is contained in:
Guido Casati
2025-06-18 10:52:15 +02:00
parent b86ae96c66
commit 4ec498c996
4 changed files with 19 additions and 27 deletions
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openair2/COMMON/ngap_messages_types.h
+4 -9
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@@ -249,15 +249,10 @@ typedef struct pdusession_s {
pdusession_level_qos_parameter_t qos[QOSFLOW_MAX_VALUE];
/* The transport layer address for the IP packets */
pdu_session_type_t pdu_session_type;
transport_layer_addr_t upf_addr;
/* Outgoing (UL) NG-U Tunnel Endpoint Identifier (S-GW/UPF) */
uint32_t gtp_teid;
/* Incoming (DL) NG-U Tunnel Endpoint Identifier (S-GW/UPF) */
uint32_t gNB_teid_N3;
transport_layer_addr_t gNB_addr_N3;
/* Incoming (DL) NG-U Tunnel Endpoint Identifier (S-GW/UPF) */
uint32_t UPF_teid_N3;
transport_layer_addr_t UPF_addr_N3;
// NG-RAN endpoint of the NG-U (N3) transport bearer
gtpu_tunnel_t n3_outgoing;
// UPF endpoint of the NG-U (N3) transport bearer
gtpu_tunnel_t n3_incoming;
nssai_t nssai;
} pdusession_t;