forked from acouzens/open5gs
139 lines
5.2 KiB
C
139 lines
5.2 KiB
C
/*
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* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
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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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/**
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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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#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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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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} 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_gtp_xact_local_create(ogs_gtp_node_t *gnode,
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ogs_gtp_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_remote_create(
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ogs_gtp_node_t *gnode, uint32_t sqn);
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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_gtp_xact_update_tx(ogs_gtp_xact_t *xact,
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ogs_gtp_header_t *hdesc, ogs_pkbuf_t *pkbuf);
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int ogs_gtp_xact_update_rx(ogs_gtp_xact_t *xact, uint8_t type);
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int ogs_gtp_xact_commit(ogs_gtp_xact_t *xact);
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int ogs_gtp_xact_receive(ogs_gtp_node_t *gnode,
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ogs_gtp_header_t *h, ogs_gtp_xact_t **xact);
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ogs_gtp_xact_t *ogs_gtp_xact_find(ogs_index_t index);
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ogs_gtp_xact_t *ogs_gtp_xact_find_by_xid(
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ogs_gtp_node_t *gnode, uint8_t type, uint32_t xid);
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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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