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126 lines
4.3 KiB
C++
126 lines
4.3 KiB
C++
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2017 Software Radio Systems Limited
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*
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* \section LICENSE
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*
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* This file is part of srsLTE.
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*
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* srsLTE 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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* srsLTE 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 S1AP_H
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#define S1AP_H
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#include "srslte/asn1/gtpc.h"
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#include "srslte/asn1/liblte_s1ap.h"
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#include "srslte/asn1/liblte_mme.h"
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#include "srslte/common/common.h"
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#include "srslte/common/log.h"
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#include <strings.h>
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#include <arpa/inet.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/sctp.h>
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#include <unistd.h>
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#include <map>
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#include <set>
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#include "mme/s1ap_common.h"
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#include "mme/s1ap_mngmt_proc.h"
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#include "mme/s1ap_nas_transport.h"
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#include "mme/mme_gtpc.h"
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#include "hss/hss.h"
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namespace srsepc{
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const uint16_t S1MME_PORT = 36412;
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class s1ap
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{
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public:
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s1ap();
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virtual ~s1ap();
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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(s1ap_args_t s1ap_args, srslte::log_filter *s1ap_log);
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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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void delete_ues_in_enb(uint16_t enb_id);
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bool handle_s1ap_rx_pdu(srslte::byte_buffer_t *pdu, struct sctp_sndrcvinfo *enb_sri);
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bool handle_initiating_message(LIBLTE_S1AP_INITIATINGMESSAGE_STRUCT *msg, struct sctp_sndrcvinfo *enb_sri);
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bool handle_s1_setup_request(LIBLTE_S1AP_MESSAGE_S1SETUPREQUEST_STRUCT *msg, struct sctp_sndrcvinfo *enb_sri);
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bool send_s1_setup_failure(struct sctp_sndrcvinfo *enb_sri);
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bool send_s1_setup_response(struct sctp_sndrcvinfo *enb_sri);
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bool handle_initial_ue_message(LIBLTE_S1AP_MESSAGE_INITIALUEMESSAGE_STRUCT *init_ue, struct sctp_sndrcvinfo *enb_sri);
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bool handle_uplink_nas_transport(LIBLTE_S1AP_MESSAGE_UPLINKNASTRANSPORT_STRUCT *ul_xport, struct sctp_sndrcvinfo *enb_sri);
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bool handle_ue_context_release_request(LIBLTE_S1AP_MESSAGE_UECONTEXTRELEASEREQUEST_STRUCT *ue_rel, struct sctp_sndrcvinfo *enb_sri);
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bool handle_nas_authentication_response(srslte::byte_buffer_t *nas_buffer, srslte::byte_buffer_t *reply_buffer, ue_ctx_t *ue_ctx);
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bool handle_nas_security_mode_complete(srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_msg, ue_ctx_t *ue_ctx);
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bool send_initial_context_setup_request(uint32_t mme_ue_s1ap_id, struct srslte::gtpc_create_session_response *cs_resp, struct srslte::gtpc_f_teid_ie sgw_ctrl_fteid);
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bool handle_successful_outcome(LIBLTE_S1AP_SUCCESSFULOUTCOME_STRUCT *msg);
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bool handle_initial_context_setup_response(LIBLTE_S1AP_MESSAGE_INITIALCONTEXTSETUPRESPONSE_STRUCT *in_ctxt_resp);
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bool handle_nas_attach_complete(srslte::byte_buffer_t *nas_msg, srslte::byte_buffer_t *reply_msg, ue_ctx_t *ue_ctx);
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void activate_eps_bearer(uint32_t mme_s1ap_id, uint8_t ebi);
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bool pack_esm_information_request(srslte::byte_buffer_t* reply_msg, srsepc::ue_ctx_t* ue_ctx);
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void print_enb_ctx_info(const enb_ctx_t &enb_ctx);
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private:
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static s1ap *m_instance;
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s1ap_args_t m_s1ap_args;
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uint32_t m_plmn;
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srslte::byte_buffer_pool *m_pool;
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srslte::logger *m_logger;
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srslte::log_filter *m_s1ap_log;
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hss *m_hss;
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int m_s1mme;
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std::map<uint16_t, enb_ctx_t*> m_active_enbs;
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std::map<int32_t, uint16_t> m_sctp_to_enb_id;
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std::map<uint32_t, ue_ctx_t*> m_active_ues;
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std::map<uint16_t,std::set<uint32_t> > m_enb_id_to_ue_ids;
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uint32_t m_next_mme_ue_s1ap_id;
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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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//FIXME the GTP-C should be moved to the MME class, the the packaging of GTP-C messages is done.
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mme_gtpc *m_mme_gtpc;
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};
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} //namespace srsepc
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#endif //S1AP_H
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