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92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
/**
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* Copyright 2013-2021 Software Radio Systems Limited
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*
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* This file is part of srsRAN.
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*
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* srsRAN 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
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* srsRAN 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 Affero General Public License for more details.
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*
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* A copy of the GNU Affero General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#ifndef SRSEPC_MME_GTPC_H
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#define SRSEPC_MME_GTPC_H
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#include "nas.h"
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#include "srsran/asn1/gtpc.h"
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#include "srsran/common/buffer_pool.h"
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#include <sys/socket.h>
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#include <sys/un.h>
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namespace srsepc {
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class spgw;
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class s1ap;
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class mme_gtpc : public gtpc_interface_nas
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{
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public:
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typedef struct gtpc_ctx {
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srsran::gtp_fteid_t mme_ctr_fteid;
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srsran::gtp_fteid_t sgw_ctr_fteid;
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} gtpc_ctx_t;
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virtual ~mme_gtpc() = default;
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static mme_gtpc* get_instance();
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bool init();
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bool send_s11_pdu(const srsran::gtpc_pdu& pdu);
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void handle_s11_pdu(srsran::byte_buffer_t* msg);
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virtual bool send_create_session_request(uint64_t imsi);
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bool handle_create_session_response(srsran::gtpc_pdu* cs_resp_pdu);
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virtual bool send_modify_bearer_request(uint64_t imsi, uint16_t erab_to_modify, srsran::gtp_fteid_t* enb_fteid);
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void handle_modify_bearer_response(srsran::gtpc_pdu* mb_resp_pdu);
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void send_release_access_bearers_request(uint64_t imsi);
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virtual bool send_delete_session_request(uint64_t imsi);
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bool handle_downlink_data_notification(srsran::gtpc_pdu* dl_not_pdu);
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void send_downlink_data_notification_acknowledge(uint64_t imsi, enum srsran::gtpc_cause_value cause);
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virtual bool send_downlink_data_notification_failure_indication(uint64_t imsi, enum srsran::gtpc_cause_value cause);
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int get_s11();
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private:
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mme_gtpc() = default;
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srslog::basic_logger& m_logger = srslog::fetch_basic_logger("MME GTPC");
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s1ap* m_s1ap;
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uint32_t m_next_ctrl_teid;
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std::map<uint32_t, uint64_t> m_mme_ctr_teid_to_imsi;
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std::map<uint64_t, struct gtpc_ctx> m_imsi_to_gtpc_ctx;
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int m_s11;
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struct sockaddr_un m_mme_addr, m_spgw_addr;
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bool init_s11();
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uint32_t get_new_ctrl_teid();
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};
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inline uint32_t mme_gtpc::get_new_ctrl_teid()
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{
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return m_next_ctrl_teid++;
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}
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inline int mme_gtpc::get_s11()
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{
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return m_s11;
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}
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} // namespace srsepc
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#endif // SRSEPC_MME_GTPC_H
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