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C++

/**
* Copyright 2013-2022 Software Radio Systems Limited
*
* This file is part of srsRAN.
*
* srsRAN is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* srsRAN is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* A copy of the GNU Affero General Public License can be found in
* the LICENSE file in the top-level directory of this distribution
* and at http://www.gnu.org/licenses/.
*
*/
#ifndef SRSEPC_GTPU_H
#define SRSEPC_GTPU_H
#include "srsepc/hdr/spgw/spgw.h"
#include "srsran/asn1/gtpc.h"
#include "srsran/common/buffer_pool.h"
#include "srsran/common/standard_streams.h"
#include "srsran/interfaces/epc_interfaces.h"
#include "srsran/srslog/srslog.h"
#include <cstddef>
#include <queue>
namespace srsepc {
class spgw::gtpu : public gtpu_interface_gtpc
{
public:
gtpu();
virtual ~gtpu();
int init(spgw_args_t* args, spgw* spgw, gtpc_interface_gtpu* gtpc);
void stop();
int init_sgi(spgw_args_t* args);
int init_s1u(spgw_args_t* args);
int get_sgi();
int get_s1u();
void handle_sgi_pdu(srsran::unique_byte_buffer_t msg);
void handle_s1u_pdu(srsran::byte_buffer_t* msg);
void send_s1u_pdu(srsran::gtp_fteid_t enb_fteid, srsran::byte_buffer_t* msg);
virtual in_addr_t get_s1u_addr();
virtual bool modify_gtpu_tunnel(in_addr_t ue_ipv4, srsran::gtp_fteid_t dw_user_fteid, uint32_t up_ctr_fteid);
virtual bool delete_gtpu_tunnel(in_addr_t ue_ipv4);
virtual bool delete_gtpc_tunnel(in_addr_t ue_ipv4);
virtual void send_all_queued_packets(srsran::gtp_fteid_t dw_user_fteid,
std::queue<srsran::unique_byte_buffer_t>& pkt_queue);
spgw* m_spgw;
gtpc_interface_gtpu* m_gtpc;
bool m_sgi_up;
int m_sgi;
bool m_s1u_up;
int m_s1u;
sockaddr_in m_s1u_addr;
std::map<in_addr_t, srsran::gtp_fteid_t> m_ip_to_usr_teid; // Map IP to User-plane TEID for downlink traffic
std::map<in_addr_t, uint32_t> m_ip_to_ctr_teid; // IP to control TEID map. Important to check if
// UE is attached without an active user-plane
// for downlink notifications.
srslog::basic_logger& m_logger = srslog::fetch_basic_logger("GTPU");
};
inline int spgw::gtpu::get_sgi()
{
return m_sgi;
}
inline int spgw::gtpu::get_s1u()
{
return m_s1u;
}
inline in_addr_t spgw::gtpu::get_s1u_addr()
{
return m_s1u_addr.sin_addr.s_addr;
}
} // namespace srsepc
#endif // SRSEPC_GTPU_H