Use callback to establish connection before sending PDUs in TestmodeB

srsue/hdr/stack/ue_stack_lte.h

@@ -72,7 +72,7 @@ public:
   void stop() final;
 
   bool get_metrics(stack_metrics_t* metrics) final;
-  bool is_rrc_connected();
+  bool is_rrc_connected() { return rrc.is_connected(); };
 
   // RRC interface for PHY
   void in_sync() final;

srsue/test/ttcn3/hdr/ttcn3_ue.h

@@ -70,6 +70,8 @@ public:
 
   void timer_expired(uint32_t timeout_id);
 
+  void send_queued_data();
+
   void loop_back_pdu_with_tft(uint32_t input_lcid, srslte::unique_byte_buffer_t pdu);
 
 private:

srsue/test/ttcn3/src/ttcn3_ue.cc

@@ -226,6 +226,20 @@ void ttcn3_ue::timer_expired(uint32_t timeout_id)
 {
   if (timeout_id == pdu_delay_timer.id()) {
     log.info("Testmode B PDU delay timer expired\n");
+    send_queued_data();
+  }
+}
+void ttcn3_ue::send_queued_data()
+{
+  if (!stack->is_rrc_connected()) {
+    log.info("RRC not connected, requesting NAS attach\n");
+    if (not stack->switch_on()) {
+      log.warning("Could not reestablish the connection\n");
+    }
+    stack->defer_callback(500, [&]() { send_queued_data(); });
+    return;
+  }
+
   for (auto& bearer_pdu_queue : pdu_queue) {
     log.info("Delivering %zd buffered PDUs for LCID=%d\n", bearer_pdu_queue.second.size(), bearer_pdu_queue.first);
     while (not bearer_pdu_queue.second.empty()) {
@@ -235,7 +249,6 @@ void ttcn3_ue::timer_expired(uint32_t timeout_id)
     }
   }
 }
-}
 
 void ttcn3_ue::loop_back_pdu_with_tft(uint32_t input_lcid, srslte::unique_byte_buffer_t pdu)
 {