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https://github.com/nextepc/nextepc-oss.git
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e3da7c9934
In the past only GTPv2C was supported, and had the "gtp" generic prefix. Later on, GTPv1C support was added, and "gtp1" prefix was used. Let's move GTPv2C specific bits to have "gtp2" prefix too, and leave "gtp" prefix for generic stuff among different GTP versions.
150 lines
5.6 KiB
C
150 lines
5.6 KiB
C
/*
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* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
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* Copyright (C) 2022 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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*
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* This file is part of Open5GS.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#if !defined(OGS_GTP_INSIDE) && !defined(OGS_GTP_COMPILATION)
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#error "This header cannot be included directly."
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#endif
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#ifndef OGS_GTP_XACT_H
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#define OGS_GTP_XACT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* p225-226 Chapter 7.6 in TS 29.274 V15.9.0
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*
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* A Sequence Number used for a Command message shall have the most significant
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* bit set to 1. A Sequence Number in a message, which was triggered by
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* a Command message, as well as respective Triggered Reply message
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* shall have the same Sequence Number as the Command message
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* (i.e. shall also have the most significant bit set to 1).
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*
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* This setting of the most significant bit of the Sequence Number is done
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* to avoid potential clashes between the Sequence Number selected for
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* a Command message, and the Sequence Number selected by a GTPv2 peer
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* for a Request message, which was not triggered by a Command message.
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*
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* A Sequence Number used for a Request message, which was not triggered
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* by a Command message shall have the most significant bit set to 0.
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*/
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#define OGS_GTP_MIN_XACT_ID 1
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#define OGS_GTP_CMD_XACT_ID 0x800000
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#define OGS_GTP1_MIN_XACT_ID 0
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#define OGS_GTP1_MAX_XACT_ID 65535
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/**
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* Transaction context
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*/
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typedef struct ogs_gtp_xact_s {
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ogs_lnode_t node; /**< A node of list */
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ogs_index_t index;
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uint8_t gtp_version; /**< 1 or 2 */
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#define OGS_GTP_LOCAL_ORIGINATOR 0
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#define OGS_GTP_REMOTE_ORIGINATOR 1
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uint8_t org; /**< Transaction' originator.
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local or remote */
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uint32_t xid; /**< Transaction ID */
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ogs_gtp_node_t *gnode; /**< Relevant GTP node context */
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void (*cb)(ogs_gtp_xact_t *, void *); /**< Local timer expiration handler */
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void *data; /**< Transaction Data */
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int step; /**< Current step in the sequence.
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1 : Initial
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2 : Triggered
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3 : Triggered-Reply */
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struct {
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uint8_t type; /**< Message type history */
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ogs_pkbuf_t *pkbuf; /**< Packet history */
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} seq[3]; /**< history for the each step */
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ogs_timer_t *tm_response; /**< Timer waiting for next message */
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uint8_t response_rcount;
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ogs_timer_t *tm_holding; /**< Timer waiting for holding message */
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uint8_t holding_rcount;
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void *assoc_xact; /**< Associated GTP transaction */
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void *pfcp_xact; /**< Associated PFCP transaction */
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#define OGS_GTP_MODIFY_TFT_UPDATE ((uint64_t)1<<0)
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#define OGS_GTP_MODIFY_QOS_UPDATE ((uint64_t)1<<1)
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uint64_t update_flags;
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#define OGS_GTP_DELETE_SEND_AUTHENTICATION_REQUEST 1
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#define OGS_GTP_DELETE_SEND_DETACH_ACCEPT 2
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#define OGS_GTP_DELETE_SEND_DEACTIVATE_BEARER_CONTEXT_REQUEST 3
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#define OGS_GTP_DELETE_SEND_UE_CONTEXT_RELEASE_COMMAND 4
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#define OGS_GTP_DELETE_HANDLE_PDN_CONNECTIVITY_REQUEST 5
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#define OGS_GTP_DELETE_UE_CONTEXT_REMOVE 6
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int delete_action;
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#define OGS_GTP_RELEASE_SEND_UE_CONTEXT_RELEASE_COMMAND 1
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#define OGS_GTP_RELEASE_S1_CONTEXT_REMOVE_BY_LO_CONNREFUSED 2
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#define OGS_GTP_RELEASE_S1_CONTEXT_REMOVE_BY_RESET_ALL 3
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#define OGS_GTP_RELEASE_S1_CONTEXT_REMOVE_BY_RESET_PARTIAL 4
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int release_action;
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#define OGS_GTP_DELETE_INDIRECT_HANDOVER_COMPLETE 1
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#define OGS_GTP_DELETE_INDIRECT_HANDOVER_CANCEL 2
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int delete_indirect_action;
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bool esm_piggybacked;
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} ogs_gtp_xact_t;
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int ogs_gtp_xact_init(void);
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void ogs_gtp_xact_final(void);
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ogs_gtp_xact_t *ogs_gtp1_xact_local_create(ogs_gtp_node_t *gnode,
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ogs_gtp1_header_t *hdesc, ogs_pkbuf_t *pkbuf,
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void (*cb)(ogs_gtp_xact_t *xact, void *data), void *data);
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ogs_gtp_xact_t *ogs_gtp_xact_local_create(ogs_gtp_node_t *gnode,
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ogs_gtp2_header_t *hdesc, ogs_pkbuf_t *pkbuf,
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void (*cb)(ogs_gtp_xact_t *xact, void *data), void *data);
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ogs_gtp_xact_t *ogs_gtp_xact_cycle(ogs_gtp_xact_t *xact);
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void ogs_gtp_xact_delete_all(ogs_gtp_node_t *gnode);
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int ogs_gtp1_xact_update_tx(ogs_gtp_xact_t *xact,
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ogs_gtp1_header_t *hdesc, ogs_pkbuf_t *pkbuf);
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int ogs_gtp_xact_update_tx(ogs_gtp_xact_t *xact,
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ogs_gtp2_header_t *hdesc, ogs_pkbuf_t *pkbuf);
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int ogs_gtp_xact_commit(ogs_gtp_xact_t *xact);
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int ogs_gtp1_xact_receive(ogs_gtp_node_t *gnode,
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ogs_gtp1_header_t *h, ogs_gtp_xact_t **xact);
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int ogs_gtp_xact_receive(ogs_gtp_node_t *gnode,
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ogs_gtp2_header_t *h, ogs_gtp_xact_t **xact);
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void ogs_gtp_xact_associate(ogs_gtp_xact_t *xact1, ogs_gtp_xact_t *xact2);
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void ogs_gtp_xact_deassociate(ogs_gtp_xact_t *xact1, ogs_gtp_xact_t *xact2);
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#ifdef __cplusplus
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}
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#endif
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#endif /* OGS_GTP_XACT_H */
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