rrc-nr,test: add test for initial_ue msg sent to ngap

Signed-off-by: Carlo Galiotto <carlo@srs.io>

srsgnb/src/stack/rrc/test/rrc_nr_test.cc

@@ -133,7 +133,7 @@ void test_rrc_sa_connection()
   mac_nr_dummy           mac_obj;
   rlc_nr_rrc_tester      rlc_obj;
   pdcp_nr_rrc_tester     pdcp_obj;
-  ngap_dummy             ngap_obj;
+  ngap_rrc_tester        ngap_obj;
 
   rrc_nr rrc_obj(&task_sched);
 
@@ -158,7 +158,8 @@ void test_rrc_sa_connection()
   uecfg.phy_cfg.pdcch.search_space_present[2] = false;
   TESTASSERT_SUCCESS(rrc_obj.add_user(0x4601, uecfg));
 
-  test_rrc_nr_connection_establishment(task_sched, rrc_obj, rlc_obj, mac_obj, 0x4601);
+
+  test_rrc_nr_connection_establishment(task_sched, rrc_obj, rlc_obj, mac_obj, ngap_obj,0x4601);
   test_rrc_nr_security_mode_cmd(task_sched, rrc_obj, pdcp_obj, 0x4601);
 }
 

srsgnb/src/stack/rrc/test/rrc_nr_test_helpers.cc

@@ -10,8 +10,11 @@
  *
  */
 
+#define DED_NAS_MSG_STRING "7E01280E534C337E004109000BF200F110800101347B80802E02F07071002D7E004109000BF200F110800101347B80801001002E02F0702F0201015200F11000006418010174000090530101"
+
 #include "rrc_nr_test_helpers.h"
 #include "srsran/common/test_common.h"
+#include <string>
 
 using namespace asn1::rrc_nr;
 
@@ -21,6 +24,7 @@ void test_rrc_nr_connection_establishment(srsran::task_scheduler& task_sched,
                                           rrc_nr&                 rrc_obj,
                                           rlc_nr_rrc_tester&      rlc,
                                           mac_nr_dummy&           mac,
+                                          ngap_rrc_tester&        ngap,
                                           uint16_t                rnti)
 {
   srsran::unique_byte_buffer_t pdu;
@@ -96,8 +100,7 @@ void test_rrc_nr_connection_establishment(srsran::task_scheduler& task_sched,
   complete_ies.registered_amf.amf_id.from_number(0x800101);
   complete_ies.guami_type_present = true;
   complete_ies.guami_type.value   = rrc_setup_complete_ies_s::guami_type_opts::native;
-  complete_ies.ded_nas_msg.from_string("7E01280E534C337E004109000BF200F110800101347B80802E02F07071002D7E004109000BF200F"
-                                       "110800101347B80801001002E02F0702F0201015200F11000006418010174000090530101");
+  auto& ded_nas_msg = complete_ies.ded_nas_msg.from_string(DED_NAS_MSG_STRING);
 
   {
     pdu = srsran::make_byte_buffer();
@@ -118,6 +121,14 @@ void test_rrc_nr_connection_establishment(srsran::task_scheduler& task_sched,
     }
   }
   TESTASSERT(ss_ue_found); /// Ensure UE-specific SearchSpace was added
+
+  // Check here if the MSG sent to NGAP is correct
+  // Create a srsran::span object for the expected MSG
+  asn1::unbounded_octstring<false> expected;
+  expected.from_string(DED_NAS_MSG_STRING);
+  srsran::span<const uint8_t> expected_span{expected};
+  TESTASSERT(expected_span == ngap.last_pdu);
+
 }
 
 void test_rrc_nr_security_mode_cmd(srsran::task_scheduler& task_sched,

srsgnb/src/stack/rrc/test/rrc_nr_test_helpers.h

@@ -49,6 +49,23 @@ public:
   srsran::unique_byte_buffer_t last_sdu;
 };
 
+class ngap_rrc_tester : public ngap_dummy
+{
+public:
+  void initial_ue(uint16_t                                rnti,
+                  uint32_t                                gnb_cc_idx,
+                  asn1::ngap_nr::rrcestablishment_cause_e cause,
+                  srsran::const_byte_span                 pdu,
+                  uint32_t                                s_tmsi)
+  {
+    last_sdu_rnti = rnti;
+    last_pdu      = pdu;
+  }
+
+  uint16_t                last_sdu_rnti;
+  srsran::const_byte_span last_pdu;
+};
+
 /**
  * Run TS 38.331, 5.3.3 "RRC connection establishment" to completion
  * RRC actions:
@@ -64,6 +81,7 @@ void test_rrc_nr_connection_establishment(srsran::task_scheduler& task_sched,
                                           rrc_nr&                 rrc_obj,
                                           rlc_nr_rrc_tester&      rlc,
                                           mac_nr_dummy&           mac,
+                                          ngap_rrc_tester&        ngap,
                                           uint16_t                rnti);
 
 void test_rrc_nr_security_mode_cmd(srsran::task_scheduler& task_sched,