add srsenb::pdcp_nr class

srsenb/hdr/stack/upper/pdcp_nr.h

@@ -0,0 +1,124 @@
+/*
+ * Copyright 2013-2020 Software Radio Systems Limited
+ *
+ * This file is part of srsLTE.
+ *
+ * srsLTE 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.
+ *
+ * srsLTE 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/.
+ *
+ */
+
+#include "srslte/common/log.h"
+#include "srslte/common/log_filter.h"
+#include "srslte/common/logger.h"
+#include "srslte/interfaces/gnb_interfaces.h"
+#include "srslte/upper/pdcp.h"
+#include <map>
+
+#ifndef SRSENB_PDCP_NR_H
+#define SRSENB_PDCP_NR_H
+
+namespace srsenb {
+
+struct pdcp_nr_args_t {
+  std::string log_level;
+  uint32_t    log_hex_limit;
+};
+
+class pdcp_nr : public pdcp_interface_rlc_nr, public pdcp_interface_sdap_nr, public pdcp_interface_rrc_nr
+{
+public:
+  explicit pdcp_nr(srslte::task_handler_interface* task_executor_, const char* logname);
+  virtual ~pdcp_nr() = default;
+  void init(const pdcp_nr_args_t&   args_,
+            rlc_interface_pdcp_nr*  rlc_,
+            rrc_interface_pdcp_nr*  rrc_,
+            sdap_interface_pdcp_nr* gtpu_);
+  void stop();
+
+  // pdcp_interface_rlc_nr
+  void write_pdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t sdu);
+  void write_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t sdu) {}
+
+  // pdcp_interface_rrc_nr
+  void reset(uint16_t rnti) final;
+  void add_user(uint16_t rnti) final;
+  void rem_user(uint16_t rnti) final;
+  void write_sdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t sdu) final;
+  void add_bearer(uint16_t rnti, uint32_t lcid, srslte::pdcp_config_t cnfg) final;
+  void config_security(uint16_t rnti, uint32_t lcid, srslte::as_security_config_t sec_cfg) final;
+  void enable_integrity(uint16_t rnti, uint32_t lcid) final;
+  void enable_encryption(uint16_t rnti, uint32_t lcid) final;
+
+private:
+  class user_interface_rlc final : public srsue::rlc_interface_pdcp
+  {
+  public:
+    uint16_t                       rnti;
+    srsenb::rlc_interface_pdcp_nr* rlc;
+    // rlc_interface_pdcp_nr
+    void write_sdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu, bool blocking) final;
+    void discard_sdu(uint32_t lcid, uint32_t discard_sn) final;
+    bool rb_is_um(uint32_t lcid) final;
+  };
+
+  class user_interface_sdap : public srsue::gw_interface_pdcp
+  {
+  public:
+    uint16_t                        rnti;
+    srsenb::sdap_interface_pdcp_nr* sdap;
+    // gw_interface_pdcp
+    void write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu) final;
+    void write_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t sdu) final {}
+  };
+
+  class user_interface_rrc : public srsue::rrc_interface_pdcp
+  {
+  public:
+    uint16_t                       rnti;
+    srsenb::rrc_interface_pdcp_nr* rrc;
+    // rrc_interface_pdcp_nr
+    void        write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu) final;
+    void        write_pdu_bcch_bch(srslte::unique_byte_buffer_t pdu) final;
+    void        write_pdu_bcch_dlsch(srslte::unique_byte_buffer_t pdu) final;
+    void        write_pdu_pcch(srslte::unique_byte_buffer_t pdu) final;
+    void        write_pdu_mch(uint32_t lcid, srslte::unique_byte_buffer_t pdu) final {}
+    std::string get_rb_name(uint32_t lcid) final;
+  };
+
+  class user_interface
+  {
+  public:
+    user_interface_rlc            rlc_itf;
+    user_interface_sdap           sdap_itf;
+    user_interface_rrc            rrc_itf;
+    std::unique_ptr<srslte::pdcp> pdcp;
+  };
+
+  // args
+  pdcp_nr_args_t            m_args = {};
+  srslte::byte_buffer_pool* pool   = nullptr;
+  srslte::log_ref           m_log;
+  rlc_interface_pdcp_nr*    m_rlc  = nullptr;
+  rrc_interface_pdcp_nr*    m_rrc  = nullptr;
+  sdap_interface_pdcp_nr*   m_sdap = nullptr;
+
+  std::map<uint32_t, user_interface> users;
+
+  srslte::task_handler_interface* task_executor;
+};
+
+} // namespace srsenb
+
+#endif // SRSENB_PDCP_NR_H

srsenb/src/stack/upper/CMakeLists.txt

@@ -18,5 +18,11 @@
 # and at http://www.gnu.org/licenses/.
 #
 
-file(GLOB SOURCES "*.cc")
+set(SOURCES gtpu.cc pdcp.cc rlc.cc s1ap.cc)
 add_library(srsenb_upper STATIC ${SOURCES})
+
+if (ENABLE_5GNR)
+set(SOURCES pdcp_nr.cc)
+add_library(srsgnb_upper STATIC ${SOURCES})
+endif (ENABLE_5GNR)
+

srsenb/src/stack/upper/pdcp_nr.cc

@@ -0,0 +1,165 @@
+/*
+ * Copyright 2013-2020 Software Radio Systems Limited
+ *
+ * This file is part of srsLTE.
+ *
+ * srsLTE 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.
+ *
+ * srsLTE 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/.
+ *
+ */
+
+#include "srsenb/hdr/stack/upper/pdcp_nr.h"
+#include "lib/include/srslte/interfaces/nr_common_interface_types.h"
+
+namespace srsenb {
+
+pdcp_nr::pdcp_nr(srslte::task_handler_interface* task_executor_, const char* logname) :
+  task_executor(task_executor_),
+  m_log(logname),
+  pool(srslte::byte_buffer_pool::get_instance())
+{}
+
+void pdcp_nr::init(const pdcp_nr_args_t&   args_,
+                   rlc_interface_pdcp_nr*  rlc_,
+                   rrc_interface_pdcp_nr*  rrc_,
+                   sdap_interface_pdcp_nr* sdap_)
+{
+  m_args = args_;
+  m_rlc  = rlc_;
+  m_rrc  = rrc_;
+  m_sdap = sdap_;
+}
+
+void pdcp_nr::stop()
+{
+  for (auto& user : users) {
+    user.second.pdcp->stop();
+  }
+  users.clear();
+}
+
+void pdcp_nr::add_user(uint16_t rnti)
+{
+  if (users.count(rnti) == 0) {
+    users[rnti].pdcp.reset(new srslte::pdcp(task_executor, "PDCP"));
+    users[rnti].rlc_itf.rnti  = rnti;
+    users[rnti].sdap_itf.rnti = rnti;
+    users[rnti].rrc_itf.rnti  = rnti;
+    users[rnti].rlc_itf.rlc   = m_rlc;
+    users[rnti].rrc_itf.rrc   = m_rrc;
+    users[rnti].sdap_itf.sdap = m_sdap;
+    users[rnti].pdcp->init(&users[rnti].rlc_itf, &users[rnti].rrc_itf, &users[rnti].sdap_itf);
+  }
+}
+
+void pdcp_nr::rem_user(uint16_t rnti)
+{
+  users.erase(rnti);
+}
+
+void pdcp_nr::add_bearer(uint16_t rnti, uint32_t lcid, srslte::pdcp_config_t cfg)
+{
+  if (users.count(rnti)) {
+    users[rnti].pdcp->add_bearer(lcid, cfg);
+  }
+}
+
+void pdcp_nr::reset(uint16_t rnti)
+{
+  if (users.count(rnti)) {
+    users[rnti].pdcp->reset();
+  }
+}
+
+void pdcp_nr::config_security(uint16_t rnti, uint32_t lcid, srslte::as_security_config_t sec_cfg)
+{
+  if (users.count(rnti)) {
+    users[rnti].pdcp->config_security(lcid, sec_cfg);
+  }
+}
+
+void pdcp_nr::enable_integrity(uint16_t rnti, uint32_t lcid)
+{
+  users[rnti].pdcp->enable_integrity(lcid, srslte::DIRECTION_TXRX);
+}
+
+void pdcp_nr::enable_encryption(uint16_t rnti, uint32_t lcid)
+{
+  users[rnti].pdcp->enable_encryption(lcid, srslte::DIRECTION_TXRX);
+}
+
+void pdcp_nr::write_pdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t sdu)
+{
+  if (users.count(rnti)) {
+    users[rnti].pdcp->write_pdu(lcid, std::move(sdu));
+  } else {
+    m_log->error("Can't write PDU. RNTI=0x%X doesn't exist.\n", rnti);
+  }
+}
+
+void pdcp_nr::write_sdu(uint16_t rnti, uint32_t lcid, srslte::unique_byte_buffer_t sdu)
+{
+  if (users.count(rnti)) {
+    users[rnti].pdcp->write_sdu(lcid, std::move(sdu), false);
+  } else {
+    m_log->error("Can't write SDU. RNTI=0x%X doesn't exist.\n", rnti);
+  }
+}
+
+void pdcp_nr::user_interface_sdap::write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu)
+{
+  sdap->write_pdu(rnti, lcid, std::move(pdu));
+}
+
+void pdcp_nr::user_interface_rlc::write_sdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu, bool blocking)
+{
+  rlc->write_sdu(rnti, lcid, std::move(sdu));
+}
+
+void pdcp_nr::user_interface_rlc::discard_sdu(uint32_t lcid, uint32_t discard_sn)
+{
+  fprintf(stderr, "discard_sdu method not implemented.\n");
+}
+
+bool pdcp_nr::user_interface_rlc::rb_is_um(uint32_t lcid)
+{
+  return rlc->rb_is_um(rnti, lcid);
+}
+
+void pdcp_nr::user_interface_rrc::write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu)
+{
+  rrc->write_pdu(rnti, lcid, std::move(pdu));
+}
+
+void pdcp_nr::user_interface_rrc::write_pdu_bcch_bch(srslte::unique_byte_buffer_t pdu)
+{
+  ERROR("Error: Received BCCH from ue=%d\n", rnti);
+}
+
+void pdcp_nr::user_interface_rrc::write_pdu_bcch_dlsch(srslte::unique_byte_buffer_t pdu)
+{
+  ERROR("Error: Received BCCH from ue=%d\n", rnti);
+}
+
+void pdcp_nr::user_interface_rrc::write_pdu_pcch(srslte::unique_byte_buffer_t pdu)
+{
+  ERROR("Error: Received PCCH from ue=%d\n", rnti);
+}
+
+std::string pdcp_nr::user_interface_rrc::get_rb_name(uint32_t lcid)
+{
+  return srslte::to_string(static_cast<srslte::rb_id_nr_t>(lcid));
+}
+
+} // namespace srsenb