mirror of https://github.com/PentHertz/srsLTE.git
139 lines
3.9 KiB
C++
139 lines
3.9 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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/******************************************************************************
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* File: spgw.h
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* Description: Top-level SP-GW class. Creates and links all
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* interfaces and helpers.
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*****************************************************************************/
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#ifndef SRSEPC_SPGW_H
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#define SRSEPC_SPGW_H
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#include <cstddef>
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#include "srslte/common/log.h"
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#include "srslte/common/logger_file.h"
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#include "srslte/common/log_filter.h"
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#include "srslte/common/buffer_pool.h"
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#include "srslte/common/threads.h"
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#include "srslte/asn1/gtpc.h"
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namespace srsepc{
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class mme_gtpc;
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const uint16_t GTPU_RX_PORT = 2152;
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typedef struct {
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std::string gtpu_bind_addr;
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std::string sgi_if_addr;
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} spgw_args_t;
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typedef struct spgw_tunnel_ctx {
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uint64_t imsi;
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in_addr_t ue_ipv4;
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uint8_t ebi;
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struct srslte::gtpc_f_teid_ie up_ctrl_fteid;
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struct srslte::gtpc_f_teid_ie up_user_fteid;
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struct srslte::gtpc_f_teid_ie dw_ctrl_fteid;
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struct srslte::gtpc_f_teid_ie dw_user_fteid;
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} spgw_tunnel_ctx_t;
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class spgw:
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public thread
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{
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public:
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static spgw* get_instance(void);
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static void cleanup(void);
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int init(spgw_args_t* args, srslte::log_filter *spgw_log);
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void stop();
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void run_thread();
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void handle_create_session_request(struct srslte::gtpc_create_session_request *cs_req, struct srslte::gtpc_pdu *cs_resp_pdu);
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void handle_modify_bearer_request(struct srslte::gtpc_pdu *mb_req_pdu, struct srslte::gtpc_pdu *mb_resp_pdu);
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void handle_delete_session_request(struct srslte::gtpc_pdu *del_req_pdu, struct srslte::gtpc_pdu *del_resp_pdu);
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void handle_release_access_bearers_request(struct srslte::gtpc_pdu *rel_req_pdu, struct srslte::gtpc_pdu *rel_resp_pdu);
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void handle_sgi_pdu(srslte::byte_buffer_t *msg);
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void handle_s1u_pdu(srslte::byte_buffer_t *msg);
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private:
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spgw();
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virtual ~spgw();
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static spgw *m_instance;
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srslte::error_t init_sgi_if(spgw_args_t *args);
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srslte::error_t init_s1u(spgw_args_t *args);
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srslte::error_t init_ue_ip(spgw_args_t *args);
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uint64_t get_new_ctrl_teid();
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uint64_t get_new_user_teid();
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in_addr_t get_new_ue_ipv4();
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spgw_tunnel_ctx_t* create_gtp_ctx(struct srslte::gtpc_create_session_request *cs_req);
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bool delete_gtp_ctx(uint32_t ctrl_teid);
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bool m_running;
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srslte::byte_buffer_pool *m_pool;
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mme_gtpc *m_mme_gtpc;
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bool m_sgi_up;
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int m_sgi_if;
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int m_sgi_sock;
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bool m_s1u_up;
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int m_s1u;
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uint64_t m_next_ctrl_teid;
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uint64_t m_next_user_teid;
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sockaddr_in m_s1u_addr;
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pthread_mutex_t m_mutex;
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std::map<uint64_t,uint32_t> m_imsi_to_ctr_teid; //IMSI to control TEID map. Important to check if UE is previously connected
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std::map<uint32_t,spgw_tunnel_ctx*> m_teid_to_tunnel_ctx; //Map control TEID to tunnel ctx. Usefull to get reply ctrl TEID, UE IP, etc.
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std::map<in_addr_t,srslte::gtpc_f_teid_ie> m_ip_to_teid; //Map IP to User-plane TEID for downlink traffic
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uint32_t m_h_next_ue_ip;
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/*Time*/
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struct timeval m_t_last_dl;
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struct timeval m_t_last_ul;
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/*Logs*/
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srslte::log_filter *m_spgw_log;
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};
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} // namespace srsepc
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#endif // SRSEPC_SPGW_H
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