mirror of https://github.com/PentHertz/srsLTE.git
170 lines
5.7 KiB
C++
170 lines
5.7 KiB
C++
/**
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* Copyright 2013-2022 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_S1AP_H
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#define SRSEPC_S1AP_H
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#include "mme_gtpc.h"
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#include "nas.h"
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#include "s1ap_ctx_mngmt_proc.h"
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#include "s1ap_erab_mngmt_proc.h"
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#include "s1ap_mngmt_proc.h"
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#include "s1ap_nas_transport.h"
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#include "s1ap_paging.h"
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#include "srsepc/hdr/hss/hss.h"
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#include "srsran/asn1/gtpc.h"
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#include "srsran/asn1/liblte_mme.h"
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#include "srsran/asn1/s1ap.h"
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#include "srsran/common/common.h"
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#include "srsran/common/s1ap_pcap.h"
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#include "srsran/common/standard_streams.h"
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#include "srsran/interfaces/epc_interfaces.h"
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#include "srsran/srslog/srslog.h"
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#include <arpa/inet.h>
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#include <map>
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#include <netinet/sctp.h>
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#include <set>
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#include <strings.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <unistd.h>
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namespace srsepc {
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const uint16_t S1MME_PORT = 36412;
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using s1ap_pdu_t = asn1::s1ap::s1ap_pdu_c;
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class s1ap : public s1ap_interface_nas, public s1ap_interface_gtpc, public s1ap_interface_mme
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{
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public:
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static s1ap* get_instance();
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static void cleanup();
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int enb_listen();
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int init(const s1ap_args_t& s1ap_args);
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void stop();
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int get_s1_mme();
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void delete_enb_ctx(int32_t assoc_id);
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bool s1ap_tx_pdu(const s1ap_pdu_t& pdu, struct sctp_sndrcvinfo* enb_sri);
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void handle_s1ap_rx_pdu(srsran::byte_buffer_t* pdu, struct sctp_sndrcvinfo* enb_sri);
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void handle_initiating_message(const asn1::s1ap::init_msg_s& msg, struct sctp_sndrcvinfo* enb_sri);
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void handle_successful_outcome(const asn1::s1ap::successful_outcome_s& msg);
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void activate_eps_bearer(uint64_t imsi, uint8_t ebi);
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void print_enb_ctx_info(const std::string& prefix, const enb_ctx_t& enb_ctx);
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uint32_t get_plmn();
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uint16_t get_tac();
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uint32_t get_next_mme_ue_s1ap_id();
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enb_ctx_t* find_enb_ctx(uint16_t enb_id);
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void add_new_enb_ctx(const enb_ctx_t& enb_ctx, const struct sctp_sndrcvinfo* enb_sri);
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void get_enb_ctx(uint16_t sctp_stream);
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bool add_nas_ctx_to_imsi_map(nas* nas_ctx);
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bool add_nas_ctx_to_mme_ue_s1ap_id_map(nas* nas_ctx);
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bool add_ue_to_enb_set(int32_t enb_assoc, uint32_t mme_ue_s1ap_id);
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virtual nas* find_nas_ctx_from_imsi(uint64_t imsi);
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nas* find_nas_ctx_from_mme_ue_s1ap_id(uint32_t mme_ue_s1ap_id);
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bool release_ue_ecm_ctx(uint32_t mme_ue_s1ap_id);
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void release_ues_ecm_ctx_in_enb(int32_t enb_assoc);
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virtual bool delete_ue_ctx(uint64_t imsi);
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uint32_t allocate_m_tmsi(uint64_t imsi);
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virtual uint64_t find_imsi_from_m_tmsi(uint32_t m_tmsi);
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s1ap_args_t m_s1ap_args;
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srslog::basic_logger& m_logger = srslog::fetch_basic_logger("S1AP");
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s1ap_mngmt_proc* m_s1ap_mngmt_proc;
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s1ap_nas_transport* m_s1ap_nas_transport;
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s1ap_ctx_mngmt_proc* m_s1ap_ctx_mngmt_proc;
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s1ap_erab_mngmt_proc* m_s1ap_erab_mngmt_proc;
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s1ap_paging* m_s1ap_paging;
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std::map<uint32_t, uint64_t> m_tmsi_to_imsi;
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std::map<uint16_t, enb_ctx_t*> m_active_enbs;
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// Interfaces
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virtual bool send_initial_context_setup_request(uint64_t imsi, uint16_t erab_to_setup);
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virtual bool send_ue_context_release_command(uint32_t mme_ue_s1ap_id);
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virtual bool send_erab_release_command(uint32_t enb_ue_s1ap_id,
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uint32_t mme_ue_s1ap_id,
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std::vector<uint16_t> erabs_to_release,
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struct sctp_sndrcvinfo enb_sri);
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virtual bool send_erab_modify_request(uint32_t enb_ue_s1ap_id,
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uint32_t mme_ue_s1ap_id,
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std::map<uint16_t, uint16_t> erabs_to_be_modified,
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srsran::byte_buffer_t* nas_msg,
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struct sctp_sndrcvinfo enb_sri);
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virtual bool send_downlink_nas_transport(uint32_t enb_ue_s1ap_id,
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uint32_t mme_ue_s1ap_id,
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srsran::byte_buffer_t* nas_msg,
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struct sctp_sndrcvinfo enb_sri);
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virtual bool send_paging(uint64_t imsi, uint16_t erab_to_setup);
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virtual bool expire_nas_timer(enum nas_timer_type type, uint64_t imsi);
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private:
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s1ap();
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virtual ~s1ap();
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static s1ap* m_instance;
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uint32_t m_plmn;
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hss_interface_nas* m_hss;
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int m_s1mme;
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std::map<int32_t, uint16_t> m_sctp_to_enb_id;
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std::map<int32_t, std::set<uint32_t> > m_enb_assoc_to_ue_ids;
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std::map<uint64_t, nas*> m_imsi_to_nas_ctx;
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std::map<uint32_t, nas*> m_mme_ue_s1ap_id_to_nas_ctx;
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uint32_t m_next_mme_ue_s1ap_id;
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uint32_t m_next_m_tmsi;
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// GTP-C Interface
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mme_gtpc* m_mme_gtpc;
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// PCAP
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bool m_pcap_enable;
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srsran::s1ap_pcap m_pcap;
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};
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inline uint32_t s1ap::get_plmn()
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{
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return m_plmn;
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}
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inline uint16_t s1ap::get_tac()
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{
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return m_s1ap_args.tac;
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}
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} // namespace srsepc
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#endif // SRSEPC_S1AP_H
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