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122 lines
4.3 KiB
C++
122 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 SRSEPC_GTPC_H
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#define SRSEPC_GTPC_H
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#include "srsepc/hdr/spgw/spgw.h"
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#include "srslte/asn1/gtpc.h"
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#include "srslte/interfaces/epc_interfaces.h"
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#include <set>
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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::gtpc : public gtpc_interface_gtpu
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{
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public:
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gtpc();
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virtual ~gtpc();
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int init(spgw_args_t* args,
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spgw* spgw,
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gtpu_interface_gtpc* gtpu,
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srslte::log_filter* gtpc_log,
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const std::map<std::string, uint64_t>& ip_to_imsi);
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void stop();
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srslte::error_t init_s11(spgw_args_t* args);
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srslte::error_t init_ue_ip(spgw_args_t* args, const std::map<std::string, uint64_t>& ip_to_imsi);
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int get_s11();
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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(uint64_t imsi);
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void handle_s11_pdu(srslte::byte_buffer_t* msg);
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bool send_s11_pdu(const srslte::gtpc_pdu& pdu);
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void handle_create_session_request(const srslte::gtpc_create_session_request& cs_req);
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void handle_modify_bearer_request(const srslte::gtpc_header& mb_req_hdr,
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const srslte::gtpc_modify_bearer_request& mb_req);
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void handle_delete_session_request(const srslte::gtpc_header& header,
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const srslte::gtpc_delete_session_request& del_req);
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void handle_release_access_bearers_request(const srslte::gtpc_header& header,
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const srslte::gtpc_release_access_bearers_request& rel_req);
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void
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handle_downlink_data_notification_acknowledge(const srslte::gtpc_header& header,
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const srslte::gtpc_downlink_data_notification_acknowledge& not_ack);
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void handle_downlink_data_notification_failure_indication(
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const srslte::gtpc_header& header, const srslte::gtpc_downlink_data_notification_failure_indication& not_fail);
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virtual bool queue_downlink_packet(uint32_t spgw_ctr_teid, srslte::byte_buffer_t* msg);
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virtual bool send_downlink_data_notification(uint32_t spgw_ctr_teid);
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spgw_tunnel_ctx_t* create_gtpc_ctx(const srslte::gtpc_create_session_request& cs_req);
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bool delete_gtpc_ctx(uint32_t ctrl_teid);
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bool free_all_queued_packets(spgw_tunnel_ctx_t* tunnel_ctx);
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spgw* m_spgw;
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gtpu_interface_gtpc* m_gtpu;
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int m_s11;
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struct sockaddr_un m_spgw_addr, m_mme_addr;
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uint32_t m_h_next_ue_ip;
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uint64_t m_next_ctrl_teid;
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uint64_t m_next_user_teid;
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uint32_t m_max_paging_queue;
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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
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// 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
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// reply ctrl TEID, UE IP, etc.
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std::set<uint32_t> m_ue_ip_addr_pool;
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std::map<uint64_t, struct in_addr> m_imsi_to_ip;
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srslte::log_filter* m_gtpc_log;
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srslte::byte_buffer_pool* m_pool;
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};
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inline int spgw::gtpc::get_s11()
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{
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return m_s11;
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}
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inline uint64_t spgw::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 uint64_t spgw::gtpc::get_new_user_teid()
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{
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return m_next_user_teid++;
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}
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} // namespace srsepc
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#endif // SRSEPC_SPGW_H
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