Introduce UE NAS SIMULATOR

tests/CMakeLists.txt

 add_subdirectory(nr-cuup)
 add_subdirectory(nr-cu-nrppa)
+add_subdirectory(nr-ue-nas-simulator)

tests/nr-ue-nas-simulator/CMakeLists.txt

+add_executable(nr-ue-nas-simulator-test nr-ue-nas-simulator.c
+               ${OPENAIR2_DIR}/GNB_APP/gnb_config_common.c
+               ${OPENAIR2_DIR}/GNB_APP/gnb_config_ng.c)
+
+target_link_libraries(nr-ue-nas-simulator-test PRIVATE nr_nas nr_common lib_uicc usim_lib)
+target_link_libraries(nr-ue-nas-simulator-test PRIVATE
+                      CONFIG_LIB ITTI SCTP_CLIENT
+                      f1ap ngap SECURITY GTPV1U
+                      UTIL softmodem_common)
+target_link_libraries(nr-ue-nas-simulator-test PRIVATE asn1_lte_rrc_hdrs asn1_nr_rrc_hdrs)
+add_dependencies(nr-ue-nas-simulator-test params_libconfig)

tests/nr-ue-nas-simulator/test.conf

+Active_gNBs = ( "gNB-OAI");
+# Asn1_verbosity, choice in: none, info, annoying
+Asn1_verbosity = "none";
+
+gNBs =
+(
+ {
+    ////////// Identification parameters:
+    gNB_ID    =  0xe00;
+    gNB_name  =  "gNB-OAI";
+
+    // Tracking area code, 0x0000 and 0xfffe are reserved values
+    tracking_area_code  =  1;
+    plmn_list = ({ mcc = 001; mnc = 01; mnc_length = 2; snssaiList = ({ sst = 1; }) });
+
+    nr_cellid = 12345678L;
+
+    # ------- SCTP definitions
+    SCTP :
+    {
+        # Number of streams to use in input/output
+        SCTP_INSTREAMS  = 2;
+        SCTP_OUTSTREAMS = 2;
+    };
+
+
+    ////////// AMF parameters:
+    amf_ip_address = ({ ipv4 = "192.168.70.132"; });
+
+
+    NETWORK_INTERFACES :
+    {
+        GNB_IPV4_ADDRESS_FOR_NG_AMF              = "192.168.70.129/24";
+        GNB_IPV4_ADDRESS_FOR_NGU                 = "192.168.70.129/24";
+        GNB_PORT_FOR_S1U                         = 2152; # Spec 2152
+    };
+
+  }
+);
+
+uicc0 = {
+  imsi = "001010000000001";
+  key = "fec86ba6eb707ed08905757b1bb44b8f";
+  opc = "C42449363BBAD02B66D16BC975D77CC1";
+  pdu_sessions = ({ dnn = "oai"; nssai_sst = 1; });
+}
+
+log_config :
+{
+  global_log_level                      ="info";
+  hw_log_level                          ="info";
+  phy_log_level                         ="info";
+  mac_log_level                         ="info";
+  rlc_log_level                         ="info";
+  pdcp_log_level                        ="info";
+  rrc_log_level                         ="info";
+  ngap_log_level                        ="debug";
+  f1ap_log_level                        ="debug";
+};