Changed NAS is_attached interface to is_registered.

lib/include/srslte/interfaces/ue_interfaces.h

@@ -224,7 +224,7 @@ public:
   virtual void     left_rrc_connected()                                       = 0;
   virtual void     set_barring(srslte::barring_t barring)                     = 0;
   virtual bool     paging(srslte::s_tmsi_t* ue_identity)                      = 0;
-  virtual bool     is_attached()                                              = 0;
+  virtual bool     is_registered()                                            = 0;
   virtual void     write_pdu(uint32_t lcid, srslte::unique_byte_buffer_t pdu) = 0;
   virtual uint32_t get_k_enb_count()                                          = 0;
   virtual bool     get_k_asme(uint8_t* k_asme_, uint32_t n)                   = 0;
@@ -623,7 +623,7 @@ public:
 class stack_interface_gw : public pdcp_interface_gw
 {
 public:
-  virtual bool is_attached()           = 0;
+  virtual bool is_registered()         = 0;
   virtual bool start_service_request() = 0;
 };
 

srsenb/hdr/stack/gnb_stack_nr.h

@@ -66,7 +66,7 @@ public:
   bool        get_metrics(srsenb::stack_metrics_t* metrics) final;
 
   // GW srsue stack_interface_gw dummy interface
-  bool is_attached(){return true;};
+  bool is_registered(){return true;};
   bool start_service_request(){return true;};
 
   // PHY->MAC interface

srsue/hdr/stack/ue_stack_lte.h

@@ -68,7 +68,7 @@ public:
   int  init(const stack_args_t& args_, srslte::logger* logger_, phy_interface_stack_lte* phy_, gw_interface_stack* gw_);
   bool switch_on() final;
   bool switch_off() final;
-  bool is_attached() final;
+  bool is_registered() final;
   bool start_service_request() final;
   bool enable_data();
   bool disable_data();

srsue/hdr/stack/ue_stack_nr.h

@@ -71,7 +71,7 @@ public:
   void stop();
 
   // GW srsue stack_interface_gw dummy interface
-  bool is_attached(){return true;};
+  bool is_registered(){return true;};
   bool start_service_request(){return true;};
   
   bool get_metrics(stack_metrics_t* metrics);

srsue/hdr/stack/upper/nas.h

@@ -72,7 +72,7 @@ public:
   void start_service_request(srslte::establishment_cause_t cause_);
 
   // Stack+RRC interface
-  bool is_attached() override;
+  bool is_registered() override;
 
   // timer callback
   void timer_expired(uint32_t timeout_id) override;

srsue/src/stack/rrc/rrc_procedures.cc

@@ -1175,7 +1175,7 @@ proc_outcome_t rrc::go_idle_proc::step()
 
 void rrc::go_idle_proc::then(const srslte::proc_state_t& result)
 {
-  if (rrc_ptr->nas->is_attached() and not rrc_ptr->cell_reselector.launch()) {
+  if (rrc_ptr->nas->is_registered() and not rrc_ptr->cell_reselector.launch()) {
     rrc_ptr->rrc_log->error("Failed to initiate a Cell Reselection procedure...\n");
     return;
   }
@@ -1245,7 +1245,7 @@ proc_outcome_t rrc::cell_reselection_proc::step()
 void rrc::cell_reselection_proc::then(const srslte::proc_state_t& result)
 {
   // Schedule cell reselection periodically, while rrc is idle
-  if (not rrc_ptr->is_connected() and rrc_ptr->nas->is_attached()) {
+  if (not rrc_ptr->is_connected() and rrc_ptr->nas->is_registered()) {
     if (cell_sel_result == cs_result_t::changed_cell) {
       // TS 36.304 5.2.4.6 - Intra-frequency and equal priority inter-frequency Cell Reselection criteria
       // the UE shall reselect a new cell if more than 1 second has elapsed since the UE camped

srsue/src/stack/ue_stack_lte.cc

@@ -262,9 +262,9 @@ void ue_stack_lte::write_sdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu)
  * Check whether nas is attached
  * @return bool wether NAS is in EMM_REGISTERED
  */
-bool ue_stack_lte::is_attached()
+bool ue_stack_lte::is_registered()
 {
-  return nas.is_attached();
+  return nas.is_registered();
 }
 
 /********************

srsue/src/stack/upper/gw.cc

@@ -221,8 +221,8 @@ void gw::run_thread()
     return;
   }
 
-  const static uint32_t ATTACH_WAIT_TOUT = 40, SERVICE_WAIT_TOUT = 40; // 4 sec
+  const static uint32_t REGISTER_WAIT_TOUT = 40, SERVICE_WAIT_TOUT = 40; // 4 sec
-  uint32_t              attach_wait = 0, service_wait = 0;
+  uint32_t              register_wait = 0, service_wait = 0;
 
   log.info("GW IP packet receiver thread run_enable\n");
 
@@ -264,24 +264,25 @@ void gw::run_thread()
       log.info_hex(pdu->msg, pdu->N_bytes, "TX PDU");
 
       // Make sure UE is attached
-      while (run_enable && !stack->is_attached() && attach_wait < ATTACH_WAIT_TOUT) {
+      while (run_enable && !stack->is_registered() && register_wait < REGISTER_WAIT_TOUT) {
-        if (!attach_wait) {
+        if (!register_wait) {
-          log.info("UE is not attached, waiting for NAS attach (%d/%d)\n", attach_wait, ATTACH_WAIT_TOUT);
+          log.info("UE is not attached, waiting for NAS attach (%d/%d)\n", register_wait, REGISTER_WAIT_TOUT);
         }
         usleep(100000);
-        attach_wait++;
+        register_wait++;
       }
-      attach_wait = 0;
+      register_wait = 0;
 
       // If we are still not attached by this stage, drop packet
-      if (run_enable && !stack->is_attached()) {
+      if (run_enable && !stack->is_registered()) {
         continue;
       }
 
       // Wait for service request if necessary
       while (run_enable && !stack->is_lcid_enabled(default_lcid) && service_wait < SERVICE_WAIT_TOUT) {
         if (!service_wait) {
-          log.info("UE does not have service, waiting for NAS service request (%d/%d)\n", service_wait, SERVICE_WAIT_TOUT);
+          log.info(
+              "UE does not have service, waiting for NAS service request (%d/%d)\n", service_wait, SERVICE_WAIT_TOUT);
           stack->start_service_request();
         }
         usleep(100000);

srsue/src/stack/upper/nas.cc

@@ -261,7 +261,7 @@ void nas::timer_expired(uint32_t timeout_id)
 /*******************************************************************************
  * UE Stack and RRC common Interface
  ******************************************************************************/
-bool nas::is_attached()
+bool nas::is_registered()
 {
   return state.get_state() == emm_state_t::state_t::registered;
 }

srsue/test/upper/nas_test.cc

@@ -158,7 +158,7 @@ public:
   void write_sdu(uint32_t lcid, srslte::unique_byte_buffer_t sdu) { pdcp->write_sdu(lcid, std::move(sdu)); }
   bool is_lcid_enabled(uint32_t lcid) { return pdcp->is_lcid_enabled(lcid); }
 
-  bool is_attached() { return true; }
+  bool is_registered() { return true; }
 
   bool start_service_request() { return true; }
 
@@ -310,7 +310,7 @@ int mme_attach_request_test()
 
     gw.init(gw_args, g_logger, &stack);
     stack.init(&nas);
-    usleep(1000); // Wait for stack to initialize before stoping it.
+    usleep(5000); // Wait for stack to initialize before stoping it.
     // trigger test
     stack.switch_on();
     stack.stop();

srsue/test/upper/rrc_meas_test.cc

@@ -174,7 +174,7 @@ class nas_test : public srsue::nas
 {
 public:
   nas_test(srslte::task_sched_handle t) : srsue::nas(t) {}
-  bool is_attached() override { return false; }
+  bool is_registered() override { return false; }
 };
 
 class pdcp_test : public srslte::pdcp