Merge branch 'develop' into 'more-verbosity-in-release'

# Conflicts:
#   src/amf-app/amf_app.cpp

ci-scripts/toCheckDSTesterResult.py

@@ -36,16 +36,17 @@ try:
                 result = re.search('(?:\/.+?\/)(.+?)(?:\/.+)', str(line))
                 if result:
                     result1 = re.search('^(.*/)([^/]*)$', str(result.group(0)))
-                    subprocess.check_output(f'cp {result1.group(1)}* DS-TEST-RESULTS/', stderr=subprocess.STDOUT, shell=True, universal_newlines=True)
+                    filename = re.search('[^/]*$', str(result1.group(0)))
+                    subprocess.check_output(f'cp -r {result1.group(1)}* DS-TEST-RESULTS/', shell=True, universal_newlines=True)
                 locexist = True
 except IOError:
     sys.exit("File not accessible to check DSTester Summary: DS-TEST-RESULTS/dsTester_Summary.txt")
 
 if locexist:
     try:
-        with open(cwd + '/DS-TEST-RESULTS/dcamf.yaml') as f:
-            data = yaml.load(f)
+        with open(cwd + f'/DS-TEST-RESULTS/{filename.group(0)}') as f:
+            data = yaml.full_load(f)
             if data["final-result"] == 'fail':
                 sys.exit('DsTester final result FAILED')
     except IOError:
-        sys.exit("File not accessible to check DSTester result: DS-TEST-RESULTS/dcamf.yaml")
+        sys.exit(f'File not accessible to check DSTester result: DS-TEST-RESULTS/{filename.group(0)}')

src/amf-app/amf_app.cpp

@@ -238,40 +238,53 @@ bool amf_app::get_pdu_sessions_context(
 //------------------------------------------------------------------------------
 void amf_app::handle_itti_message(
     itti_n1n2_message_transfer_request& itti_msg) {
-  Logger::amf_app().error("Handle ITTI N1N2 Message Transfer Request");
-  // Encode DL NAS TRANSPORT message(NAS message)
-  DLNASTransport* dl = new DLNASTransport();
-  dl->setHeader(PLAIN_5GS_MSG);
-  dl->setPayload_Container_Type(N1_SM_INFORMATION);
-  dl->setPayload_Container(
-      (uint8_t*) bdata(itti_msg.n1sm), blength(itti_msg.n1sm));
-  dl->setPDUSessionId(itti_msg.pdu_session_id);
-
-  uint8_t nas[1024];
-  int encoded_size = dl->encode2buffer(nas, 1024);
-  print_buffer("amf_app", "n1n2 transfer", nas, encoded_size);
-  bstring dl_nas = blk2bstr(nas, encoded_size);
-
-  itti_downlink_nas_transfer* dl_msg =
-      new itti_downlink_nas_transfer(TASK_AMF_APP, TASK_AMF_N1);
-  dl_msg->dl_nas = dl_nas;
-  if (!itti_msg.is_n2sm_set) {
-    dl_msg->is_n2sm_set = false;
+  if (itti_msg.is_ppi_set) {  // Paging procedure
+    std::shared_ptr<itti_paging> i =
+        std::make_shared<itti_paging>(TASK_AMF_APP, TASK_AMF_N2);
+    i.get()->amf_ue_ngap_id = amf_n1_inst->supi2amfId.at(itti_msg.supi);
+    i.get()->ran_ue_ngap_id = amf_n1_inst->supi2ranId.at(itti_msg.supi);
+
+    int ret = itti_inst->send_msg(i);
+    if (0 != ret) {
+      Logger::amf_app().error(
+          "Could not send ITTI message %s to task TASK_AMF_N2",
+          i->get_msg_name());
+    }
   } else {
-    dl_msg->n2sm           = itti_msg.n2sm;
-    dl_msg->pdu_session_id = itti_msg.pdu_session_id;
-    dl_msg->is_n2sm_set    = true;
-    dl_msg->n2sm_info_type = itti_msg.n2sm_info_type;
-  }
-  dl_msg->amf_ue_ngap_id = amf_n1_inst->supi2amfId.at(itti_msg.supi);
-  dl_msg->ran_ue_ngap_id = amf_n1_inst->supi2ranId.at(itti_msg.supi);
-  std::shared_ptr<itti_downlink_nas_transfer> i =
-      std::shared_ptr<itti_downlink_nas_transfer>(dl_msg);
-  int ret = itti_inst->send_msg(i);
-  if (0 != ret) {
-    Logger::amf_app().error(
-        "Could not send ITTI message %s to task TASK_AMF_N1",
-        i->get_msg_name());
+    // Encode DL NAS TRANSPORT message(NAS message)
+    DLNASTransport* dl = new DLNASTransport();
+    dl->setHeader(PLAIN_5GS_MSG);
+    dl->setPayload_Container_Type(N1_SM_INFORMATION);
+    dl->setPayload_Container(
+        (uint8_t*) bdata(itti_msg.n1sm), blength(itti_msg.n1sm));
+    dl->setPDUSessionId(itti_msg.pdu_session_id);
+
+    uint8_t nas[BUFFER_SIZE_1024];
+    int encoded_size = dl->encode2buffer(nas, BUFFER_SIZE_1024);
+    print_buffer("amf_app", "n1n2 transfer", nas, encoded_size);
+    bstring dl_nas = blk2bstr(nas, encoded_size);
+
+    itti_downlink_nas_transfer* dl_msg =
+        new itti_downlink_nas_transfer(TASK_AMF_APP, TASK_AMF_N1);
+    dl_msg->dl_nas = dl_nas;
+    if (!itti_msg.is_n2sm_set) {
+      dl_msg->is_n2sm_set = false;
+    } else {
+      dl_msg->n2sm           = itti_msg.n2sm;
+      dl_msg->pdu_session_id = itti_msg.pdu_session_id;
+      dl_msg->is_n2sm_set    = true;
+      dl_msg->n2sm_info_type = itti_msg.n2sm_info_type;
+    }
+    dl_msg->amf_ue_ngap_id = amf_n1_inst->supi2amfId.at(itti_msg.supi);
+    dl_msg->ran_ue_ngap_id = amf_n1_inst->supi2ranId.at(itti_msg.supi);
+    std::shared_ptr<itti_downlink_nas_transfer> i =
+        std::shared_ptr<itti_downlink_nas_transfer>(dl_msg);
+    int ret = itti_inst->send_msg(i);
+    if (0 != ret) {
+      Logger::amf_app().error(
+          "Could not send ITTI message %s to task TASK_AMF_N1",
+          i->get_msg_name());
+    }
   }
 }
 

src/amf-app/amf_n1.cpp

@@ -412,7 +412,7 @@ void amf_n1::nas_signalling_establishment_request_handle(
     set_amf_ue_ngap_id_2_nas_context(amf_ue_ngap_id, nc);
     nc.get()->ctx_avaliability_ind = false;
     // change UE connection status CM-IDLE -> CM-CONNECTED
-    nc.get()->nas_status      = "CM-CONNECTED";
+    nc.get()->nas_status      = CM_CONNECTED;
     nc.get()->amf_ue_ngap_id  = amf_ue_ngap_id;
     nc.get()->ran_ue_ngap_id  = ran_ue_ngap_id;
     nc.get()->serving_network = snn;
@@ -582,7 +582,7 @@ void amf_n1::identity_response_handle(
     nc.get()->ctx_avaliability_ind = false;
   }
   nc.get()->ctx_avaliability_ind         = true;
-  nc.get()->nas_status                   = "CM-CONNECTED";
+  nc.get()->nas_status                   = CM_CONNECTED;
   nc.get()->amf_ue_ngap_id               = amf_ue_ngap_id;
   nc.get()->ran_ue_ngap_id               = ran_ue_ngap_id;
   nc.get()->is_imsi_present              = true;
@@ -847,7 +847,7 @@ void amf_n1::registration_request_handle(
           set_amf_ue_ngap_id_2_nas_context(amf_ue_ngap_id, nc);
           nc.get()->ctx_avaliability_ind = false;
           // change UE connection status CM-IDLE -> CM-CONNECTED
-          nc.get()->nas_status      = "CM-CONNECTED";
+          nc.get()->nas_status      = CM_CONNECTED;
           nc.get()->amf_ue_ngap_id  = amf_ue_ngap_id;
           nc.get()->ran_ue_ngap_id  = ran_ue_ngap_id;
           nc.get()->serving_network = snn;
@@ -925,7 +925,7 @@ void amf_n1::registration_request_handle(
         set_amf_ue_ngap_id_2_nas_context(amf_ue_ngap_id, nc);
         nc.get()->ctx_avaliability_ind = false;
         // change UE connection status CM-IDLE -> CM-CONNECTED
-        nc.get()->nas_status                 = "CM-CONNECTED";
+        nc.get()->nas_status                 = CM_CONNECTED;
         nc.get()->amf_ue_ngap_id             = amf_ue_ngap_id;
         nc.get()->ran_ue_ngap_id             = ran_ue_ngap_id;
         nc.get()->serving_network            = snn;
@@ -1052,6 +1052,9 @@ void amf_n1::registration_request_handle(
   // Get pdu session status(OPtional IE), associated and active pdu sessions
   // available in UE
 
+  bstring nas_msg;
+  bool is_messagecontainer = regReq->getNasMessageContainer(nas_msg);
+
   // Store NAS information into nas_context
   // Run different registration procedure
   switch (reg_type) {
@@ -1069,8 +1072,12 @@ void amf_n1::registration_request_handle(
     } break;
 
     case PERIODIC_REGISTRATION_UPDATING: {
-      Logger::amf_n1().error(
-          "Network does not support periodic registration, reject ...");
+      Logger::amf_n1().debug("Network handling periodic registration...");
+      if (is_messagecontainer)
+        run_periodic_registration_update_procedure(nc, nas_msg);
+      else
+        run_periodic_registration_update_procedure(
+            nc, regReq->getPduSessionStatus());
     } break;
 
     case EMERGENCY_REGISTRATION: {
@@ -2777,6 +2784,178 @@ void amf_n1::run_mobility_registration_update_procedure(
   }
 }
 
+//------------------------------------------------------------------------------
+void amf_n1::run_periodic_registration_update_procedure(
+    std::shared_ptr<nas_context> nc, uint16_t pdu_session_status) {
+  // Experimental procedure
+  // encoding REGISTRATION ACCEPT
+  std::unique_ptr<RegistrationAccept> regAccept =
+      std::make_unique<RegistrationAccept>();
+  regAccept->setHeader(PLAIN_5GS_MSG);
+  regAccept->set_5GS_Registration_Result(false, false, false, 0x01);
+  regAccept->set5G_GUTI(
+      amf_cfg.guami.mcc, amf_cfg.guami.mnc, amf_cfg.guami.regionID,
+      amf_cfg.guami.AmfSetID, amf_cfg.guami.AmfPointer, 0x264a34c0);
+  regAccept->setT3512_Value(0x5, 0x1e);
+
+  std::vector<p_tai_t> tai_list;
+  p_tai_t item0   = {};
+  item0.type      = 0x00;
+  nas_plmn_t plmn = {};
+  plmn.mcc        = amf_cfg.plmn_list[0].mcc;
+  plmn.mnc        = amf_cfg.plmn_list[0].mnc;
+  item0.plmn_list.push_back(plmn);
+  item0.tac_list.push_back(amf_cfg.plmn_list[0].tac);
+  tai_list.push_back(item0);
+  regAccept->setTaiList(tai_list);
+  //
+  //  std::vector<struct SNSSAI_s> nssai;
+  //  SNSSAI_t snssai;
+  //  snssai.sst = 0;
+  //  snssai.sd = -1;
+  //  snssai.mHplmnSst = -1;
+  //  snssai.mHplmnSd = -1;
+  //  nssai.push_back(snssai);
+  //  regAccept->setALLOWED_NSSAI(nssai);
+
+  if (pdu_session_status == 0x0000) {
+    regAccept->setPDU_session_status(0x0000);
+  } else {
+    regAccept->setPDU_session_status(pdu_session_status);
+    Logger::amf_n1().debug(
+        "Setting PDU Session Status 0x%02x", htonl(pdu_session_status));
+    // serApt->setPDU_session_status(0x2000);
+  }
+
+  regAccept->set_5GS_Network_Feature_Support(0x01, 0x00);
+  uint8_t buffer[BUFFER_SIZE_1024] = {0};
+  int encoded_size = regAccept->encode2buffer(buffer, BUFFER_SIZE_1024);
+  print_buffer(
+      "amf_n1", "Registration-Accept Message Buffer", buffer, encoded_size);
+  if (!encoded_size) {
+    Logger::nas_mm().error("Encode Registration-Accept message error");
+    return;
+  }
+
+  nas_secu_ctx* secu = nc.get()->security_ctx;
+  // protect nas message
+  bstring protectedNas;
+  encode_nas_message_protected(
+      secu, false, INTEGRITY_PROTECTED_AND_CIPHERED, NAS_MESSAGE_DOWNLINK,
+      buffer, encoded_size, protectedNas);
+
+  string supi = "imsi-" + nc.get()->imsi;
+  Logger::amf_n1().debug("Key for pdu session context SUPI (%s)", supi.c_str());
+
+  itti_dl_nas_transport* itti_msg =
+      new itti_dl_nas_transport(TASK_AMF_N1, TASK_AMF_N2);
+  itti_msg->ran_ue_ngap_id = nc.get()->ran_ue_ngap_id;
+  itti_msg->amf_ue_ngap_id = nc.get()->amf_ue_ngap_id;
+  itti_msg->nas            = protectedNas;
+  std::shared_ptr<itti_dl_nas_transport> i =
+      std::shared_ptr<itti_dl_nas_transport>(itti_msg);
+  int ret = itti_inst->send_msg(i);
+  if (0 != ret) {
+    Logger::amf_n1().error(
+        "Could not send ITTI message %s to task TASK_AMF_N2",
+        i->get_msg_name());
+  }
+}
+//------------------------------------------------------------------------------
+void amf_n1::run_periodic_registration_update_procedure(
+    std::shared_ptr<nas_context> nc, bstring& nas_msg) {
+  // Experimental procedure
+
+  // decoding REGISTRATION request
+  std::unique_ptr<RegistrationRequest> regReq =
+      std::make_unique<RegistrationRequest>();
+  regReq->decodefrombuffer(
+      nullptr, (uint8_t*) bdata(nas_msg), blength(nas_msg));
+  bdestroy(nas_msg);  // free buffer
+
+  // encoding REGISTRATION ACCEPT
+  std::unique_ptr<RegistrationAccept> regAccept =
+      std::make_unique<RegistrationAccept>();
+  regAccept->setHeader(PLAIN_5GS_MSG);
+  regAccept->set_5GS_Registration_Result(false, false, false, 0x01);
+  regAccept->set5G_GUTI(
+      amf_cfg.guami.mcc, amf_cfg.guami.mnc, amf_cfg.guami.regionID,
+      amf_cfg.guami.AmfSetID, amf_cfg.guami.AmfPointer, 0x264a34c0);
+  regAccept->setT3512_Value(0x5, 0x1e);
+
+  std::vector<p_tai_t> tai_list;
+  p_tai_t item0   = {};
+  item0.type      = 0x00;
+  nas_plmn_t plmn = {};
+  plmn.mcc        = amf_cfg.plmn_list[0].mcc;
+  plmn.mnc        = amf_cfg.plmn_list[0].mnc;
+  item0.plmn_list.push_back(plmn);
+  item0.tac_list.push_back(amf_cfg.plmn_list[0].tac);
+  tai_list.push_back(item0);
+  regAccept->setTaiList(tai_list);
+  //
+  //  std::vector<struct SNSSAI_s> nssai;
+  //  SNSSAI_t snssai;
+  //  snssai.sst = 0;
+  //  snssai.sd = -1;
+  //  snssai.mHplmnSst = -1;
+  //  snssai.mHplmnSd = -1;
+  //  nssai.push_back(snssai);
+  //  regAccept->setALLOWED_NSSAI(nssai);
+
+  uint16_t pdu_session_status = 0xffff;
+  pdu_session_status          = regReq->getPduSessionStatus();
+  if (pdu_session_status == 0x0000) {
+    regAccept->setPDU_session_status(0x0000);
+  } else {
+    regAccept->setPDU_session_status(pdu_session_status);
+    Logger::amf_n1().debug(
+        "setting pdu session status 0x%02x", htonl(pdu_session_status));
+    // serApt->setPDU_session_status(0x2000);
+  }
+
+  regAccept->set_5GS_Network_Feature_Support(0x01, 0x00);
+  uint8_t buffer[BUFFER_SIZE_1024] = {0};
+  int encoded_size = regAccept->encode2buffer(buffer, BUFFER_SIZE_1024);
+  print_buffer(
+      "amf_n1", "Registration-Accept Message Buffer", buffer, encoded_size);
+  if (!encoded_size) {
+    Logger::nas_mm().error("Encode Registration-Accept message error");
+    return;
+  }
+
+  nas_secu_ctx* secu = nc.get()->security_ctx;
+  // protect nas message
+  bstring protectedNas;
+  encode_nas_message_protected(
+      secu, false, INTEGRITY_PROTECTED_AND_CIPHERED, NAS_MESSAGE_DOWNLINK,
+      buffer, encoded_size, protectedNas);
+
+  string supi = "imsi-" + nc.get()->imsi;
+  Logger::amf_n1().debug("Key for pdu session context SUPI (%s)", supi.c_str());
+  std::shared_ptr<pdu_session_context> psc;
+  /*  if (amf_n11_inst->is_supi_to_pdu_ctx(supi)) {
+      psc = amf_n11_inst->supi_to_pdu_ctx(supi);
+    } else {
+      Logger::amf_n1().error("Cannot get pdu_session_context with SUPI (%s)",
+                             supi.c_str());
+    }
+  */
+  itti_dl_nas_transport* itti_msg =
+      new itti_dl_nas_transport(TASK_AMF_N1, TASK_AMF_N2);
+  itti_msg->ran_ue_ngap_id = nc.get()->ran_ue_ngap_id;
+  itti_msg->amf_ue_ngap_id = nc.get()->amf_ue_ngap_id;
+  itti_msg->nas            = protectedNas;
+  std::shared_ptr<itti_dl_nas_transport> i =
+      std::shared_ptr<itti_dl_nas_transport>(itti_msg);
+  int ret = itti_inst->send_msg(i);
+  if (0 != ret) {
+    Logger::amf_n1().error(
+        "Could not send ITTI message %s to task TASK_AMF_N2",
+        i->get_msg_name());
+  }
+}
+
 //------------------------------------------------------------------------------
 void amf_n1::set_5gmm_state(
     std::shared_ptr<nas_context> nc, _5gmm_state_t state) {

src/amf-app/amf_n1.hpp

@@ -105,6 +105,12 @@ class amf_n1 {
   void run_mobility_registration_update_procedure(
       std::shared_ptr<nas_context> nc, uint16_t uplink_data_status,
       uint16_t pdu_session_status);
+
+  void run_periodic_registration_update_procedure(
+      std::shared_ptr<nas_context> nc, uint16_t);
+  void run_periodic_registration_update_procedure(
+      std::shared_ptr<nas_context> nc, bstring& nas_msg);
+
   // authentication
   bool auth_vectors_generator(std::shared_ptr<nas_context>& nc);
 

src/amf-app/amf_n11.cpp

@@ -494,6 +494,7 @@ void amf_n11::handle_post_sm_context_response_error(
   itti_msg->is_n2sm_set    = false;
   itti_msg->supi           = supi;
   itti_msg->pdu_session_id = pdu_session_id;
+  itti_msg->is_ppi_set     = false;
   std::shared_ptr<itti_n1n2_message_transfer_request> i =
       std::shared_ptr<itti_n1n2_message_transfer_request>(itti_msg);
   int ret = itti_inst->send_msg(i);
@@ -586,8 +587,8 @@ void amf_n11::curl_http_client(
     nlohmann::json response_data   = {};
     bstring n1sm_hex, n2sm_hex;
 
-    Logger::amf_n11().debug("Get response with HTTP code (%d)", httpCode);
-    Logger::amf_n11().debug("response body %s", response.c_str());
+    Logger::amf_n11().info("Get response with HTTP code (%d)", httpCode);
+    Logger::amf_n11().info("Response body %s", response.c_str());
 
     if (static_cast<http_response_codes_e>(httpCode) ==
         http_response_codes_e::HTTP_RESPONSE_CODE_0) {
@@ -610,6 +611,8 @@ void amf_n11::curl_http_client(
       json_data_response = response;
     }
 
+    Logger::amf_n11().info("Json part %s", json_data_response.c_str());
+
     if ((static_cast<http_response_codes_e>(httpCode) !=
          http_response_codes_e::HTTP_RESPONSE_CODE_200_OK) &&
         (static_cast<http_response_codes_e>(httpCode) !=
@@ -716,6 +719,8 @@ void amf_n11::curl_http_client(
 
         itti_msg->is_n1sm_set = false;
         itti_msg->is_n2sm_set = false;
+        itti_msg->is_ppi_set  = false;
+
         if (n1sm.size() > 0) {
           msg_str_2_msg_hex(n1sm, n1sm_hex);
           print_buffer(
@@ -1106,10 +1111,6 @@ void amf_n11::curl_http_client(
       return;
     }
 
-    else {
-      response = *httpData.get();
-    }
-
     if (!is_response_ok) {
       try {
         response_data = nlohmann::json::parse(json_data_response);

src/amf-app/amf_n2.cpp

@@ -42,6 +42,7 @@
 #include "PduSessionResourceSetupRequest.hpp"
 #include "UEContextReleaseCommand.hpp"
 #include "HandoverPreparationFailure.hpp"
+#include "Paging.hpp"
 #include "amf_app.hpp"
 #include "amf_config.hpp"
 #include "amf_n1.hpp"
@@ -198,6 +199,11 @@ void amf_n2_task(void* args_p) {
             dynamic_cast<itti_uplink_ran_status_transfer*>(msg);
         amf_n2_inst->handle_itti_message(ref(*m));
       } break;
+      case PAGING: {
+        Logger::amf_n2().info("Received Paging message,handling");
+        itti_paging* m = dynamic_cast<itti_paging*>(msg);
+        amf_n2_inst->handle_itti_message(ref(*m));
+      } break;
       default:
         Logger::amf_n2().info("No handler for msg type %d", msg->msg_type);
     }
@@ -217,12 +223,56 @@ amf_n2::amf_n2(const std::string& address, const uint16_t port_num)
 //------------------------------------------------------------------------------
 amf_n2::~amf_n2() {}
 
-// NGAP Messages Handlers
 //------------------------------------------------------------------------------
-void amf_n2::handle_itti_message(itti_new_sctp_association& new_assoc) {
-}  // handled in class ngap_app
+void amf_n2::handle_itti_message(itti_paging& itti_msg) {
+  Logger::amf_n2().debug("Handling Paging message...");
+
+  std::shared_ptr<ue_ngap_context> unc = {};
+
+  if (!is_ran_ue_id_2_ue_ngap_context(itti_msg.ran_ue_ngap_id)) {
+    Logger::amf_n2().error(
+        "No UE NGAP context with ran_ue_ngap_id (%d)", itti_msg.ran_ue_ngap_id);
+    return;
+  }
+
+  unc = ran_ue_id_2_ue_ngap_context(itti_msg.ran_ue_ngap_id);
+  if (unc.get()->amf_ue_ngap_id != itti_msg.amf_ue_ngap_id) {
+    Logger::amf_n2().error(
+        "The requested UE (amf_ue_ngap_id: 0x%x) is not valid, existed UE "
+        "which's amf_ue_ngap_id (0x%x)",
+        itti_msg.amf_ue_ngap_id, unc.get()->amf_ue_ngap_id);
+  }
+
+  // TODO: check UE reachability status
+
+  PagingMsg paging_msg = {};
+  paging_msg.setMessageType();
+  Logger::amf_n2().debug(
+      " UE NGAP Context, s_setid (%d), s_pointer (%d), s_tmsi (%d)",
+      unc.get()->s_setid, unc.get()->s_pointer, unc.get()->s_tmsi);
+  paging_msg.setUEPagingIdentity(
+      unc.get()->s_setid, unc.get()->s_pointer, unc.get()->s_tmsi);
+
+  std ::vector<struct Tai_s> list;
+  Tai_t tai = {};
+  tai.mcc   = unc.get()->tai.mcc;
+  tai.mnc   = unc.get()->tai.mnc;
+  tai.tac   = unc.get()->tai.tac;
+
+  list.push_back(tai);
+  paging_msg.setTAIListForPaging(list);
+
+  uint8_t buffer[BUFFER_SIZE_512];
+  int encoded_size = paging_msg.encode2buffer(buffer, BUFFER_SIZE_512);
+  bstring b        = blk2bstr(buffer, encoded_size);
+
+  amf_n2_inst->sctp_s_38412.sctp_send_msg(
+      unc.get()->gnb_assoc_id, unc.get()->sctp_stream_send, &b);
+}
+
+//------------------------------------------------------------------------------
+void amf_n2::handle_itti_message(itti_new_sctp_association& new_assoc) {}
 
-// NG_SETUP_REQUEST Handler
 //------------------------------------------------------------------------------
 void amf_n2::handle_itti_message(itti_ng_setup_request& itti_msg) {
   Logger::amf_n2().debug(
@@ -491,6 +541,8 @@ void amf_n2::handle_itti_message(itti_initial_ue_message& init_ue_msg) {
     return;
   }
 
+  if (!init_ue_msg.initUeMsg) return;
+
   // UE NGAP Context
   uint32_t ran_ue_ngap_id;
   if ((ran_ue_ngap_id = init_ue_msg.initUeMsg->getRanUENgapID()) == -1) {
@@ -525,8 +577,9 @@ void amf_n2::handle_itti_message(itti_initial_ue_message& init_ue_msg) {
     Tai_t tai;
 
     if (init_ue_msg.initUeMsg->getUserLocationInfoNR(cgi, tai)) {
-      itti_msg->cgi = cgi;
-      itti_msg->tai = tai;
+      itti_msg->cgi  = cgi;
+      itti_msg->tai  = tai;
+      unc.get()->tai = tai;
     } else {
       Logger::amf_n2().error("Missing Mandatory IE UserLocationInfoNR");
       return;
@@ -554,6 +607,9 @@ void amf_n2::handle_itti_message(itti_initial_ue_message& init_ue_msg) {
       itti_msg->is_5g_s_tmsi_present = true;
       itti_msg->_5g_s_tmsi           = _5g_s_tmsi;
       Logger::amf_n2().debug("5g_s_tmsi present");
+
+      init_ue_msg.initUeMsg->get5GS_TMSI(
+          unc.get()->s_setid, unc.get()->s_pointer, unc.get()->s_tmsi);
     }
 
     uint8_t* nas_buf;
@@ -687,15 +743,15 @@ void amf_n2::handle_itti_message(itti_dl_nas_transport& dl_nas_transport) {
 
 //------------------------------------------------------------------------------
 void amf_n2::handle_itti_message(itti_initial_context_setup_request& itti_msg) {
-  std::shared_ptr<ue_ngap_context> unc;
+  std::shared_ptr<ue_ngap_context> unc = {};
   unc = ran_ue_id_2_ue_ngap_context(itti_msg.ran_ue_ngap_id);
   if (unc.get() == nullptr) {
     Logger::amf_n2().error(
         "Illegal UE with ran_ue_ngap_id (0x%x)", itti_msg.ran_ue_ngap_id);
     return;
   }
-  unc.get()->ncc = 1;
-  std::shared_ptr<gnb_context> gc;
+  unc.get()->ncc                  = 1;
+  std::shared_ptr<gnb_context> gc = {};
   gc = assoc_id_2_gnb_context(unc.get()->gnb_assoc_id);
   if (gc.get() == nullptr) {
     Logger::amf_n2().error(
@@ -807,8 +863,8 @@ void amf_n2::handle_itti_message(itti_initial_context_setup_request& itti_msg) {
     }
   }
 
-  uint8_t buffer[20000];  // TODO: remove hardcoded value
-  int encoded_size = msg->encode2buffer(buffer, 10000);
+  uint8_t buffer[BUFFER_SIZE_2048];
+  int encoded_size = msg->encode2buffer(buffer, BUFFER_SIZE_2048);
   bstring b        = blk2bstr(buffer, encoded_size);
   sctp_s_38412.sctp_send_msg(
       gc.get()->sctp_assoc_id, unc.get()->sctp_stream_send, &b);

src/amf-app/amf_n2.hpp

@@ -65,6 +65,7 @@ class amf_n2 : public ngap::ngap_app {
   void send_handover_preparation_failure(
       const unsigned long amf_ue_ngap_id, const uint32_t ran_ue_ngap_id,
       const sctp_assoc_id_t& gnb_assoc_id);
+  void handle_itti_message(itti_paging& itti_msg);
 
   bool verifyPlmn(std::vector<SupportedItem_t> list);
   std::vector<SupportedItem_t> get_common_plmn(

src/common/3gpp_29.518.h

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this
+ *file except in compliance with the License. You may obtain a copy of the
+ *License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#ifndef FILE_3GPP_29_518_SEEN
+#define FILE_3GPP_29_518_SEEN
+
+#include <vector>
+
+enum n1_n2_message_transfer_cause_e {
+  ATTEMPTING_TO_REACH_UE            = 1,
+  N1_N2_TRANSFER_INITIATED          = 2,
+  WAITING_FOR_ASYNCHRONOUS_TRANSFER = 3,
+  UE_NOT_RESPONDING                 = 4,
+  N1_MSG_NOT_TRANSFERRED            = 5,
+  UE_NOT_REACHABLE_FOR_SESSION      = 6
+};
+
+static const std::vector<std::string> n1_n2_message_transfer_cause_e2str = {
+    "UNKNOWN ERROR",
+    "ATTEMPTING_TO_REACH_UE",
+    "N1_N2_TRANSFER_INITIATED",
+    "WAITING_FOR_ASYNCHRONOUS_TRANSFER",
+    "UE_NOT_RESPONDING",
+    "N1_MSG_NOT_TRANSFERRED",
+    "UE_NOT_REACHABLE_FOR_SESSION"};
+
+#endif

src/common/amf.hpp

@@ -29,6 +29,8 @@
 #define __AMF_HPP
 
 #include "3gpp_23.003.h"
+#include "3gpp_29.518.h"
+
 /*
 typedef struct {
   std::string mcc;

src/contexts/CMakeLists.txt

@@ -37,7 +37,6 @@ include_directories(${SRC_TOP_DIR}/utils)
 include_directories(${SRC_TOP_DIR}/utils/bstr)
 
 add_library (CONTEXTS STATIC
-  ${CMAKE_CURRENT_SOURCE_DIR}/gNB_context.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/nas_context.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/pdu_session_context.cpp
   ${CMAKE_CURRENT_SOURCE_DIR}/ue_context.cpp

src/contexts/gNB_context.hpp

@@ -45,10 +45,15 @@ extern "C" {
 using namespace sctp;
 using namespace ngap;
 
-enum amf_ng_gnb_state_s { NGAP_INIT, NGAP_RESETING, NGAP_READY, NGAP_SHUTDOWN };
+typedef enum {
+  NGAP_INIT,
+  NGAP_RESETING,
+  NGAP_READY,
+  NGAP_SHUTDOWN
+} amf_ng_gnb_state_t;
 class gnb_context {
  public:
-  enum amf_ng_gnb_state_s ng_state;
+  amf_ng_gnb_state_t ng_state;
 
   std::string gnb_name;
   long globalRanNodeId;

src/contexts/nas_context.hpp

@@ -56,6 +56,11 @@ static const std::vector<std::string> _5gmm_state_e2str = {
     "_5GMM_COMMON_PROCEDURE_INITIATED",
     "_5GMM_STATE_MAX"};
 
+typedef enum { CM_IDLE = 0, CM_CONNECTED } cm_state_t;
+
+static const std::vector<std::string> cm_state_e2str = {"CM_IDLE",
+                                                        "CM_CONNECTED"};
+
 class nas_context {
  public:
   nas_context();
@@ -64,7 +69,7 @@ class nas_context {
   bool is_stacs_available;
   long amf_ue_ngap_id;
   uint32_t ran_ue_ngap_id;
-  std::string nas_status;
+  cm_state_t nas_status;
   _5gmm_state_t _5gmm_state;
 
   // parameters from Registration request

src/contexts/ue_ngap_context.hpp

@@ -59,6 +59,12 @@ class ue_ngap_context {
   bool ueContextRequest;
   uint32_t s_tmsi_5g;
 
+  std ::string s_setid;
+  std ::string s_pointer;
+  std ::string s_tmsi;
+
+  Tai_t tai;
+
   // state management, ue status over the air
   ng_ue_state_t ng_ue_state;
   uint8_t ncc;  // Next Hop Chaining Counter

src/itti/itti_msg.hpp

@@ -91,6 +91,7 @@ typedef enum {
   HANDOVER_NOTIFY,
   UPLINK_RAN_STATUS_TRANSFER,
   PDU_SESSION_RESOURCE_SETUP_RESPONSE,
+  PAGING,
   TIME_OUT,
   HEALTH_PING,
   TERMINATE,

src/itti/msgs/itti_msg_amf_app.hpp

@@ -66,7 +66,11 @@ class itti_n1n2_message_transfer_request : public itti_msg_amf_app {
  public:
   itti_n1n2_message_transfer_request(
       const task_id_t origin, const task_id_t destination)
-      : itti_msg_amf_app(N1N2_MESSAGE_TRANSFER_REQ, origin, destination) {}
+      : itti_msg_amf_app(N1N2_MESSAGE_TRANSFER_REQ, origin, destination) {
+    is_n2sm_set = false;
+    is_n1sm_set = false;
+    is_ppi_set  = false;
+  }
   itti_n1n2_message_transfer_request(
       const itti_n1n2_message_transfer_request& i)
       : itti_msg_amf_app(i) {}
@@ -78,6 +82,8 @@ class itti_n1n2_message_transfer_request : public itti_msg_amf_app {
   bool is_n1sm_set;
   uint8_t pdu_session_id;
   std::string n2sm_info_type;
+  bool is_ppi_set;
+  uint8_t ppi;
   // other parameters
 };
 

src/itti/msgs/itti_msg_n1.hpp

@@ -34,6 +34,7 @@ class itti_msg_n1 : public itti_msg {
   itti_msg_n1(const itti_msg_n1& i) : itti_msg(i) {
     is_nas_signalling_estab_req = i.is_nas_signalling_estab_req;
     ran_ue_ngap_id              = i.ran_ue_ngap_id;
+    amf_ue_ngap_id              = i.amf_ue_ngap_id;
   }
 
  public:

src/itti/msgs/itti_msg_n11.hpp

@@ -94,7 +94,6 @@ class itti_nsmf_pdusession_update_sm_context : public itti_msg_n11 {
     is_n2sm_set    = i.is_n2sm_set;
     n2sm_info_type = i.n2sm_info_type;
     promise_id     = i.promise_id;
-    ;
   }
 
  public:
@@ -114,8 +113,10 @@ class itti_nsmf_pdusession_release_sm_context : public itti_msg_n11 {
       const task_id_t origin, const task_id_t destination)
       : itti_msg_n11(NSMF_PDU_SESSION_RELEASE_SM_CTX, origin, destination) {}
   itti_nsmf_pdusession_release_sm_context(
-      const itti_nsmf_pdusession_update_sm_context& i)
-      : itti_msg_n11(i) {}
+      const itti_nsmf_pdusession_release_sm_context& i)
+      : itti_msg_n11(i) {
+    supi = i.supi;
+  }
 
  public:
   std::string supi;

src/itti/msgs/itti_msg_n2.hpp

@@ -61,7 +61,9 @@ class itti_new_sctp_association : public itti_msg_n2 {
 class itti_ng_setup_request : public itti_msg_n2 {
  public:
   itti_ng_setup_request(const task_id_t origin, const task_id_t destination)
-      : itti_msg_n2(NG_SETUP_REQ, origin, destination) {}
+      : itti_msg_n2(NG_SETUP_REQ, origin, destination) {
+    ngSetupReq = nullptr;
+  }
   itti_ng_setup_request(const itti_ng_setup_request& i) : itti_msg_n2(i) {}
 
  public:
@@ -71,7 +73,9 @@ class itti_ng_setup_request : public itti_msg_n2 {
 class itti_ng_reset : public itti_msg_n2 {
  public:
   itti_ng_reset(const task_id_t origin, const task_id_t destination)
-      : itti_msg_n2(NG_RESET, origin, destination) {}
+      : itti_msg_n2(NG_RESET, origin, destination) {
+    ngReset = nullptr;
+  }
   itti_ng_reset(const itti_ng_reset& i) : itti_msg_n2(i) {}
 
  public:
@@ -88,7 +92,9 @@ class itti_ng_shutdown : public itti_msg_n2 {
 class itti_initial_ue_message : public itti_msg_n2 {
  public:
   itti_initial_ue_message(const task_id_t origin, const task_id_t destination)
-      : itti_msg_n2(INITIAL_UE_MSG, origin, destination) {}
+      : itti_msg_n2(INITIAL_UE_MSG, origin, destination) {
+    initUeMsg = nullptr;
+  }
   itti_initial_ue_message(const itti_initial_ue_message& i) : itti_msg_n2(i) {}
 
   InitialUEMessageMsg* initUeMsg;
@@ -97,7 +103,9 @@ class itti_initial_ue_message : public itti_msg_n2 {
 class itti_ul_nas_transport : public itti_msg_n2 {
  public:
   itti_ul_nas_transport(const task_id_t origin, const task_id_t destination)
-      : itti_msg_n2(ITTI_UL_NAS_TRANSPORT, origin, destination) {}
+      : itti_msg_n2(ITTI_UL_NAS_TRANSPORT, origin, destination) {
+    ulNas = nullptr;
+  }
   itti_ul_nas_transport(const itti_ul_nas_transport& i) : itti_msg_n2(i) {}
 
   UplinkNASTransportMsg* ulNas;
@@ -172,7 +180,9 @@ class itti_ue_context_release_request : public itti_msg_n2 {
  public:
   itti_ue_context_release_request(
       const task_id_t origin, const task_id_t destination)
-      : itti_msg_n2(UE_CONTEXT_RELEASE_REQUEST, origin, destination) {}
+      : itti_msg_n2(UE_CONTEXT_RELEASE_REQUEST, origin, destination) {
+    ueCtxRel = nullptr;
+  }
   itti_ue_context_release_request(const itti_ue_context_release_request& i)
       : itti_msg_n2(i) {}
   UEContextReleaseRequestMsg* ueCtxRel;
@@ -183,7 +193,7 @@ class itti_ue_context_release_command : public itti_msg_n2 {
   itti_ue_context_release_command(
       const task_id_t origin, const task_id_t destination)
       : itti_msg_n2(UE_CONTEXT_RELEASE_COMMAND, origin, destination) {}
-  itti_ue_context_release_command(const itti_dl_nas_transport& i)
+  itti_ue_context_release_command(const itti_ue_context_release_command& i)
       : itti_msg_n2(i) {}
 
  public:
@@ -196,7 +206,9 @@ class itti_ue_context_release_complete : public itti_msg_n2 {
  public:
   itti_ue_context_release_complete(
       const task_id_t origin, const task_id_t destination)
-      : itti_msg_n2(UE_CONTEXT_RELEASE_COMPLETE, origin, destination) {}
+      : itti_msg_n2(UE_CONTEXT_RELEASE_COMPLETE, origin, destination) {
+    ueCtxRelCmpl = nullptr;
+  }
   itti_ue_context_release_complete(const itti_ue_context_release_complete& i)
       : itti_msg_n2(i) {}
   UEContextReleaseCompleteMsg* ueCtxRelCmpl;
@@ -206,7 +218,9 @@ class itti_ue_radio_capability_indication : public itti_msg_n2 {
  public:
   itti_ue_radio_capability_indication(
       const task_id_t origin, const task_id_t destination)
-      : itti_msg_n2(UE_RADIO_CAP_IND, origin, destination) {}
+      : itti_msg_n2(UE_RADIO_CAP_IND, origin, destination) {
+    ueRadioCap = nullptr;
+  }
   itti_ue_radio_capability_indication(
       const itti_ue_radio_capability_indication& i)
       : itti_msg_n2(i) {}
@@ -216,15 +230,30 @@ class itti_ue_radio_capability_indication : public itti_msg_n2 {
 class itti_handover_required : public itti_msg_n2 {
  public:
   itti_handover_required(const task_id_t origin, const task_id_t destination)
-      : itti_msg_n2(HANDOVER_REQUIRED, origin, destination) {}
+      : itti_msg_n2(HANDOVER_REQUIRED, origin, destination) {
+    handoverReq = nullptr;
+  }
   itti_handover_required(const itti_handover_required& i) : itti_msg_n2(i) {}
   HandoverRequiredMsg* handoverReq;
 };
 
+class itti_paging : public itti_msg_n2 {
+ public:
+  itti_paging(const task_id_t origin, const task_id_t destination)
+      : itti_msg_n2(PAGING, origin, destination) {}
+  itti_paging(const itti_paging& i) : itti_msg_n2(i) {}
+
+ public:
+  uint32_t ran_ue_ngap_id;
+  long amf_ue_ngap_id;
+};
+
 class itti_handover_request_Ack : public itti_msg_n2 {
  public:
   itti_handover_request_Ack(const task_id_t origin, const task_id_t destination)
-      : itti_msg_n2(HANDOVER_REQUEST_ACK, origin, destination) {}
+      : itti_msg_n2(HANDOVER_REQUEST_ACK, origin, destination) {
+    handoverrequestAck = nullptr;
+  }
   itti_handover_request_Ack(const itti_handover_request_Ack& i)
       : itti_msg_n2(i) {}
   HandoverRequestAck* handoverrequestAck;
@@ -233,7 +262,9 @@ class itti_handover_request_Ack : public itti_msg_n2 {
 class itti_handover_notify : public itti_msg_n2 {
  public:
   itti_handover_notify(const task_id_t origin, const task_id_t destination)
-      : itti_msg_n2(HANDOVER_NOTIFY, origin, destination) {}
+      : itti_msg_n2(HANDOVER_NOTIFY, origin, destination) {
+    handovernotify = nullptr;
+  }
   itti_handover_notify(const itti_handover_notify& i) : itti_msg_n2(i) {}
   HandoverNotifyMsg* handovernotify;
 };
@@ -242,7 +273,9 @@ class itti_uplink_ran_status_transfer : public itti_msg_n2 {
  public:
   itti_uplink_ran_status_transfer(
       const task_id_t origin, const task_id_t destination)
-      : itti_msg_n2(UPLINK_RAN_STATUS_TRANSFER, origin, destination) {}
+      : itti_msg_n2(UPLINK_RAN_STATUS_TRANSFER, origin, destination) {
+    uplinkrantransfer = nullptr;
+  }
   itti_uplink_ran_status_transfer(const itti_uplink_ran_status_transfer& i)
       : itti_msg_n2(i) {}
   UplinkRANStatusTransfer* uplinkrantransfer;

src/ngap/libngap/NativeEnumerated.c

@@ -243,7 +243,6 @@ asn_dec_rval_t NativeEnumerated_decode_aper(
   }
 
   ASN_DEBUG("Decoding %s as NativeEnumerated", td->name);
-  // printf("test0515 Decoding %s as NativeEnumerated\n", td->name);
 
   if (ct->flags & APC_EXTENSIBLE) {
     int inext = per_get_few_bits(pd, 1);

src/ngap/libngap/NativeInteger.c

@@ -321,7 +321,6 @@ asn_dec_rval_t NativeInteger_decode_aper(
 
   (void) opt_codec_ctx;
   ASN_DEBUG("Decoding NativeInteger %s (APER)", td->name);
-  // printf("test0515 Decoding NativeInteger %s (APER)\n", td->name);
 
   if (!native) {
     native = (long*) (*sptr = CALLOC(1, sizeof(*native)));

src/ngap/libngap/constr_CHOICE.c

@@ -1033,8 +1033,6 @@ asn_dec_rval_t CHOICE_decode_aper(
     if (value < 0) ASN__DECODE_STARVED;
     ASN_DEBUG(
         "CHOICE %s got index %d in range %d", td->name, value, ct->range_bits);
-    // printf("test0515 CHOICE %s got index %d in range %d\n", td->name, value,
-    // ct->range_bits);
     if (value > ct->upper_bound) ASN__DECODE_FAILED;
   } else {
     if (specs->ext_start == -1) ASN__DECODE_FAILED;
@@ -1059,7 +1057,6 @@ asn_dec_rval_t CHOICE_decode_aper(
     memb_ptr2 = &memb_ptr;
   }
   ASN_DEBUG("Discovered CHOICE %s encodes %s", td->name, elm->name);
-  // printf("test0515 Discovered CHOICE %s encodes %s\n", td->name, elm->name);
 
   if (ct && ct->range_bits >= 0) {
     rv = elm->type->op->aper_decoder(
@@ -1074,8 +1071,6 @@ asn_dec_rval_t CHOICE_decode_aper(
   if (rv.code != RC_OK) {
     ASN_DEBUG(
         "Failed to decode %s in %s (CHOICE) %d", elm->name, td->name, rv.code);
-    // printf("test0515 Failed to decode %s in %s (CHOICE) %d\n", elm->name,
-    // td->name, rv.code);
   }
   return rv;
 }

src/ngap/libngap/constr_SEQUENCE.c

@@ -1493,7 +1493,6 @@ asn_dec_rval_t SEQUENCE_decode_aper(
   }
 
   ASN_DEBUG("Decoding %s as SEQUENCE (APER)", td->name);
-  // printf("test0515 Decoding %s as SEQUENCE (APER)\n", td->name);
 
   /* Handle extensions */
   if (specs->first_extension < 0) {
@@ -1566,9 +1565,6 @@ asn_dec_rval_t SEQUENCE_decode_aper(
       ASN_DEBUG(
           "Member %s->%s is optional, p=%d (%d->%d)", td->name, elm->name,
           present, (int) opmd.nboff, (int) opmd.nbits);
-      // printf("test0515 Member %s->%s is optional, p=%d (%d->%d)\n",
-      //          td->name, elm->name, present,
-      //          (int)opmd.nboff, (int)opmd.nbits);
       if (present == 0) {
         /* This element is not present */
         if (elm->default_value_set) {
@@ -1587,7 +1583,6 @@ asn_dec_rval_t SEQUENCE_decode_aper(
 
     /* Fetch the member from the stream */
     ASN_DEBUG("Decoding member \"%s\" in %s", elm->name, td->name);
-    // printf("test0515 Decoding member \"%s\" in %s\n", elm->name, td->name);
 
     if (elm->flags & ATF_OPEN_TYPE) {
       rv = OPEN_TYPE_aper_get(opt_codec_ctx, td, st, elm, pd);

src/ngap/libngap/per_opentype.c

@@ -406,7 +406,6 @@ static asn_dec_rval_t aper_open_type_get_simple(
   ASN__STACK_OVERFLOW_CHECK(ctx);
 
   ASN_DEBUG("Getting open type %s...", td->name);
-  // printf("test0515 Getting open type %s...\n", td->name);
 
   do {
     chunk_bytes = aper_get_length(pd, -1, -1, &repeat);
@@ -433,8 +432,6 @@ static asn_dec_rval_t aper_open_type_get_simple(
 
   ASN_DEBUG(
       "Getting open type %s encoded in %ld bytes", td->name, (long) bufLen);
-  // printf("test0515 Getting open type %s encoded in %ld bytes\n", td->name,
-  //(long)bufLen);
 
   memset(&spd, 0, sizeof(spd));
   spd.buffer = buf;

src/ngap/ngapIEs/FiveGSTmsi.cpp

@@ -46,6 +46,7 @@ bool FiveGSTmsi::decodefrompdu(Ngap_FiveG_S_TMSI_t pdu) {
   amfSetid.getAMFSetID(setId);
   amfPointer.getAMFPointer(pointer);
   _5g_s_tmsi = setId + pointer + std::to_string(tmsi);
+  tmsi_value = std::to_string(tmsi);
   return true;
 }
 
@@ -53,3 +54,33 @@ bool FiveGSTmsi::decodefrompdu(Ngap_FiveG_S_TMSI_t pdu) {
 void FiveGSTmsi::getValue(std::string& tmsi) {
   tmsi = _5g_s_tmsi;
 }
+
+//------------------------------------------------------------------------------
+void FiveGSTmsi::getValue(
+    std::string& setid, std::string& pointer, std::string& tmsi) {
+  amfSetid.getAMFSetID(setid);
+  amfPointer.getAMFPointer(pointer);
+  tmsi = tmsi_value;
+}
+
+//------------------------------------------------------------------------------
+void FiveGSTmsi::setValue(
+    std::string& setid, std::string& pointer, std::string& tmsi) {
+  amfSetid.setAMFSetID(setid);
+  amfPointer.setAMFPointer(pointer);
+  _5g_s_tmsi = tmsi;
+}
+
+//------------------------------------------------------------------------------
+bool FiveGSTmsi::encode2pdu(Ngap_FiveG_S_TMSI_t* pdu) {
+  amfSetid.encode2bitstring(pdu->aMFSetID);
+  amfPointer.encode2bitstring(pdu->aMFPointer);
+
+  uint32_t tmsi        = (uint32_t) std::stol(_5g_s_tmsi);
+  uint8_t* buf         = (uint8_t*) malloc(sizeof(uint32_t));
+  *(uint32_t*) buf     = htonl(tmsi);
+  pdu->fiveG_TMSI.buf  = buf;
+  pdu->fiveG_TMSI.size = sizeof(uint32_t);
+
+  return true;
+}

src/ngap/ngapIEs/FiveGSTmsi.hpp

@@ -47,9 +47,13 @@ class FiveGSTmsi {
  public:
   bool decodefrompdu(Ngap_FiveG_S_TMSI_t pdu);
   void getValue(std::string& value);
+  void getValue(std::string& setid, std::string& pointer, std::string& tmsi);
+  void setValue(std::string& setid, std::string& pointer, std::string& tmsi);
+  bool encode2pdu(Ngap_FiveG_S_TMSI_t* pdu);
 
  private:
   std::string _5g_s_tmsi;
+  std::string tmsi_value;
 
   AMFSetID amfSetid;
   AMFPointer amfPointer;

src/ngap/ngapIEs/TAIListforPaging.cpp

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this
+ * file except in compliance with the License. You may obtain a copy of the
+ * License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include "TAIListforPaging.hpp"
+
+extern "C" {
+#include "Ngap_TAIListForPagingItem.h"
+}
+
+#include <iostream>
+using namespace std;
+
+namespace ngap {
+
+//------------------------------------------------------------------------------
+TAIListForPaging::TAIListForPaging() {
+  tai      = nullptr;
+  numOftai = 0;
+}
+
+//------------------------------------------------------------------------------
+TAIListForPaging::~TAIListForPaging() {
+  if (!tai) delete[] tai;
+}
+
+//------------------------------------------------------------------------------
+bool TAIListForPaging::encode2TAIListForPaging(Ngap_TAIListForPaging_t* pdu) {
+  for (int i = 0; i < numOftai; i++) {
+    Ngap_TAIListForPagingItem_t* ta = (Ngap_TAIListForPagingItem_t*) calloc(
+        1, sizeof(Ngap_TAIListForPagingItem_t));
+    if (!tai[i].encode2TAI(&ta->tAI)) return false;
+    if (ASN_SEQUENCE_ADD(&pdu->list, ta) != 0) return false;
+  }
+  return true;
+}
+
+//------------------------------------------------------------------------------
+bool TAIListForPaging::decodefromTAIListForPaging(
+    Ngap_TAIListForPaging_t* pdu) {
+  numOftai = pdu->list.count;
+  if (numOftai < 0) return false;
+  tai = new TAI[numOftai];
+  for (int i = 0; i < numOftai; i++) {
+    if (!tai[i].decodefromTAI(&pdu->list.array[i]->tAI)) return false;
+  }
+
+  return true;
+}
+
+//------------------------------------------------------------------------------
+void TAIListForPaging::setTAIListForPaging(TAI* m_tai, int numOfItem) {
+  tai      = m_tai;
+  numOftai = numOfItem;
+}
+
+//------------------------------------------------------------------------------
+void TAIListForPaging::getTAIListForPaging(TAI*& m_tai, int& numOfItem) {
+  m_tai     = tai;
+  numOfItem = numOftai;
+}
+
+}  // namespace ngap

src/contexts/gNB_context.cpp → src/ngap/ngapIEs/TAIListforPaging.hpp

-/*
- * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The OpenAirInterface Software Alliance licenses this file to You under
- * the OAI Public License, Version 1.1  (the "License"); you may not use this
- * file except in compliance with the License. You may obtain a copy of the
- * License at
- *
- *      http://www.openairinterface.org/?page_id=698
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *-------------------------------------------------------------------------------
- * For more information about the OpenAirInterface (OAI) Software Alliance:
- *      contact@openairinterface.org
- */
-
-/*! \file gNB_context.cpp
- \brief
- \author  Keliang DU, BUPT
- \date 2020
- \email: contact@openairinterface.org
- */
-
-#include "gNB_context.hpp"
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this
+ * file except in compliance with the License. You may obtain a copy of the
+ * License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#ifndef _TAILISTFORPAGING_H_
+#define _TAILISTFORPAGING_H_
+
+#include "TAI.hpp"
+
+extern "C" {
+#include "Ngap_TAIListForPaging.h"
+}
+
+namespace ngap {
+
+class TAIListForPaging {
+ public:
+  TAIListForPaging();
+  virtual ~TAIListForPaging();
+
+  void setTAIListForPaging(TAI* m_tai, int numOfItem);
+  void getTAIListForPaging(TAI*& m_tai, int& numOfItem);
+  bool encode2TAIListForPaging(Ngap_TAIListForPaging_t* pdu);
+  bool decodefromTAIListForPaging(Ngap_TAIListForPaging_t* pdu);
+
+ private:
+  TAI* tai;
+  int numOftai;
+};
+
+}  // namespace ngap
+
+#endif

src/ngap/ngapIEs/UEPagingIdentity.cpp

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this
+ * file except in compliance with the License. You may obtain a copy of the
+ * License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include "UEPagingIdentity.hpp"
+
+namespace ngap {
+
+//------------------------------------------------------------------------------
+UEPagingIdentity::UEPagingIdentity() {}
+
+//------------------------------------------------------------------------------
+UEPagingIdentity::~UEPagingIdentity() {}
+
+//------------------------------------------------------------------------------
+void UEPagingIdentity::setUEPagingIdentity(
+    std::string& setid, std::string& pointer, std::string& tmsi) {
+  fiveGSTmsi.setValue(setid, pointer, tmsi);
+}
+
+//------------------------------------------------------------------------------
+void UEPagingIdentity::getUEPagingIdentity(std::string& _5g_s_tmsi) {
+  fiveGSTmsi.getValue(_5g_s_tmsi);
+}
+
+//------------------------------------------------------------------------------
+void UEPagingIdentity::getUEPagingIdentity(
+    std::string& setid, std::string& pointer, std::string& tmsi) {
+  fiveGSTmsi.getValue(setid, pointer, tmsi);
+}
+
+//------------------------------------------------------------------------------
+bool UEPagingIdentity::encode2pdu(Ngap_UEPagingIdentity_t* pdu) {
+  pdu->present = Ngap_UEPagingIdentity_PR_fiveG_S_TMSI;
+  Ngap_FiveG_S_TMSI_t* ie =
+      (Ngap_FiveG_S_TMSI_t*) calloc(1, sizeof(Ngap_FiveG_S_TMSI_t));
+  pdu->choice.fiveG_S_TMSI = ie;
+  if (!fiveGSTmsi.encode2pdu(pdu->choice.fiveG_S_TMSI)) return false;
+
+  return true;
+}
+
+//------------------------------------------------------------------------------
+bool UEPagingIdentity::decodefrompdu(Ngap_UEPagingIdentity_t pdu) {
+  if (pdu.present != Ngap_UEPagingIdentity_PR_fiveG_S_TMSI) return false;
+  if (!fiveGSTmsi.decodefrompdu(*pdu.choice.fiveG_S_TMSI)) return false;
+
+  return true;
+}
+}  // namespace ngap

src/ngap/ngapIEs/UEPagingIdentity.hpp

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this
+ * file except in compliance with the License. You may obtain a copy of the
+ * License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#ifndef _UEPAGINGIDENTITY_H_
+#define _UEPAGINGIDENTITY_H_
+
+#include "FiveGSTmsi.hpp"
+
+extern "C" {
+#include "Ngap_UEPagingIdentity.h"
+}
+
+namespace ngap {
+
+class UEPagingIdentity {
+ public:
+  UEPagingIdentity();
+  virtual ~UEPagingIdentity();
+
+  void setUEPagingIdentity(
+      std::string& setid, std::string& pointer, std::string& tmsi);
+  void getUEPagingIdentity(std::string& _5g_s_tmsi);
+  void getUEPagingIdentity(
+      std::string& setid, std::string& pointer, std::string& tmsi);
+  bool encode2pdu(Ngap_UEPagingIdentity_t* pdu);
+  bool decodefrompdu(Ngap_UEPagingIdentity_t pdu);
+
+ private:
+  FiveGSTmsi fiveGSTmsi;
+};
+
+}  // namespace ngap
+
+#endif

src/ngap/ngapMsgs/InitialUEMessage.cpp

@@ -454,4 +454,14 @@ bool InitialUEMessageMsg::get5GS_TMSI(string& _5g_s_tmsi) {
     return false;
 }
 
+//------------------------------------------------------------------------------
+bool InitialUEMessageMsg::get5GS_TMSI(
+    std ::string& setid, std ::string& pointer, std ::string& tmsi) {
+  if (fivegSTmsi) {
+    fivegSTmsi->getValue(setid, pointer, tmsi);
+    return true;
+  } else
+    return false;
+}
+
 }  // namespace ngap

src/ngap/ngapMsgs/InitialUEMessage.hpp

@@ -67,6 +67,8 @@ class InitialUEMessageMsg {
   int getRRCEstablishmentCause();
   int getUeContextRequest();
   bool get5GS_TMSI(std::string& _5g_s_tmsi);
+  bool get5GS_TMSI(
+      std ::string& setid, std ::string& pointer, std ::string& tmsi);
 
  private:
   Ngap_NGAP_PDU_t* initialUEMessagePdu;

src/ngap/ngapMsgs/Paging.cpp

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this
+ * file except in compliance with the License. You may obtain a copy of the
+ * License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include "Paging.hpp"
+
+#include <iostream>
+using namespace std;
+
+namespace ngap {
+
+//------------------------------------------------------------------------------
+PagingMsg::PagingMsg() {
+  pagingPdu        = nullptr;
+  pagingIEs        = nullptr;
+  uePagingIdentity = nullptr;
+  taIListForPaging = nullptr;
+}
+
+//------------------------------------------------------------------------------
+PagingMsg::~PagingMsg() {
+  if (!uePagingIdentity) delete uePagingIdentity;
+  if (!taIListForPaging) delete taIListForPaging;
+}
+
+//------------------------------------------------------------------------------
+void PagingMsg::setMessageType() {
+  if (!pagingPdu)
+    pagingPdu = (Ngap_NGAP_PDU_t*) calloc(1, sizeof(Ngap_NGAP_PDU_t));
+
+  MessageType PagingTypeIE;
+  PagingTypeIE.setProcedureCode(Ngap_ProcedureCode_id_Paging);
+  PagingTypeIE.setTypeOfMessage(Ngap_NGAP_PDU_PR_initiatingMessage);
+  PagingTypeIE.setCriticality(Ngap_Criticality_ignore);
+  PagingTypeIE.setValuePresent(Ngap_InitiatingMessage__value_PR_Paging);
+
+  if (PagingTypeIE.getProcedureCode() == Ngap_ProcedureCode_id_Paging &&
+      PagingTypeIE.getTypeOfMessage() == Ngap_NGAP_PDU_PR_initiatingMessage &&
+      PagingTypeIE.getCriticality() == Ngap_Criticality_ignore) {
+    PagingTypeIE.encode2pdu(pagingPdu);
+    pagingIEs = &(pagingPdu->choice.initiatingMessage->value.choice.Paging);
+  } else {
+    cout << "[warning] This information doesn't refer to Paging "
+            "Message!!!"
+         << endl;
+  }
+}
+
+//------------------------------------------------------------------------------
+int PagingMsg::encode2buffer(uint8_t* buf, int buf_size) {
+  asn_fprint(stderr, &asn_DEF_Ngap_NGAP_PDU, pagingPdu);
+  asn_enc_rval_t er = aper_encode_to_buffer(
+      &asn_DEF_Ngap_NGAP_PDU, NULL, pagingPdu, buf, buf_size);
+  cout << "er.encoded(" << er.encoded << ")" << endl;
+  return er.encoded;
+}
+
+//------------------------------------------------------------------------------
+bool PagingMsg::decodefrompdu(Ngap_NGAP_PDU_t* ngap_msg_pdu) {
+  pagingPdu = ngap_msg_pdu;
+
+  if (pagingPdu->present == Ngap_NGAP_PDU_PR_initiatingMessage) {
+    if (pagingPdu->choice.initiatingMessage &&
+        pagingPdu->choice.initiatingMessage->procedureCode ==
+            Ngap_ProcedureCode_id_Paging &&
+        pagingPdu->choice.initiatingMessage->criticality ==
+            Ngap_Criticality_ignore &&
+        pagingPdu->choice.initiatingMessage->value.present ==
+            Ngap_InitiatingMessage__value_PR_Paging) {
+      pagingIEs = &pagingPdu->choice.initiatingMessage->value.choice.Paging;
+    } else {
+      cout << "Check Paging message error!!!" << endl;
+      return false;
+    }
+  } else {
+    cout << "MessageType error!!!" << endl;
+    return false;
+  }
+  for (int i = 0; i < pagingIEs->protocolIEs.list.count; i++) {
+    switch (pagingIEs->protocolIEs.list.array[i]->id) {
+      case Ngap_ProtocolIE_ID_id_UEPagingIdentity: {
+        if (pagingIEs->protocolIEs.list.array[i]->criticality ==
+                Ngap_Criticality_ignore &&
+            pagingIEs->protocolIEs.list.array[i]->value.present ==
+                Ngap_PagingIEs__value_PR_UEPagingIdentity) {
+          uePagingIdentity = new UEPagingIdentity();
+          if (!uePagingIdentity->decodefrompdu(
+                  pagingIEs->protocolIEs.list.array[i]
+                      ->value.choice.UEPagingIdentity)) {
+            cout << "Decoded NGAP UEPagingIdentity IE error" << endl;
+            return false;
+          }
+          cout << "[Paging] Received UEPagingIdentity " << endl;
+        } else {
+          cout << "Decoded NGAP UEPagingIdentity IE error" << endl;
+          return false;
+        }
+      } break;
+      case Ngap_ProtocolIE_ID_id_TAIListForPaging: {
+        if (pagingIEs->protocolIEs.list.array[i]->criticality ==
+                Ngap_Criticality_ignore &&
+            pagingIEs->protocolIEs.list.array[i]->value.present ==
+                Ngap_PagingIEs__value_PR_TAIListForPaging) {
+          taIListForPaging = new TAIListForPaging();
+          if (!taIListForPaging->decodefromTAIListForPaging(
+                  &pagingIEs->protocolIEs.list.array[i]
+                       ->value.choice.TAIListForPaging)) {
+            cout << "Decoded NGAP TAIListForPaging IE error" << endl;
+            return false;
+          }
+          cout << "[Paging] Received TAIListForPaging " << endl;
+        } else {
+          cout << "Decoded NGAP TAIListForPaging IE error" << endl;
+          return false;
+        }
+      } break;
+      default: {
+        cout << "not decoded IE:" << pagingIEs->protocolIEs.list.array[i]->id
+             << endl;
+        return true;
+      }
+    }
+  }
+
+  return true;
+}
+
+//------------------------------------------------------------------------------
+void PagingMsg::setUEPagingIdentity(
+    std::string SetId, std::string Pointer, std::string tmsi) {
+  if (!uePagingIdentity) uePagingIdentity = new UEPagingIdentity();
+  uePagingIdentity->setUEPagingIdentity(SetId, Pointer, tmsi);
+
+  Ngap_PagingIEs_t* ie =
+      (Ngap_PagingIEs_t*) calloc(1, sizeof(Ngap_PagingIEs_t));
+  ie->id            = Ngap_ProtocolIE_ID_id_UEPagingIdentity;
+  ie->criticality   = Ngap_Criticality_ignore;
+  ie->value.present = Ngap_PagingIEs__value_PR_UEPagingIdentity;
+
+  int ret = uePagingIdentity->encode2pdu(&ie->value.choice.UEPagingIdentity);
+  if (!ret) {
+    cout << "encode UEPagingIdentity IE error" << endl;
+    return;
+  }
+
+  ret = ASN_SEQUENCE_ADD(&pagingIEs->protocolIEs.list, ie);
+  if (ret != 0) cout << "encode UEPagingIdentity IE error" << endl;
+}
+
+//------------------------------------------------------------------------------
+void PagingMsg::getUEPagingIdentity(std::string& _5g_s_tmsi) {
+  if (uePagingIdentity) uePagingIdentity->getUEPagingIdentity(_5g_s_tmsi);
+}
+
+//------------------------------------------------------------------------------
+void PagingMsg::getUEPagingIdentity(
+    std::string& setid, std::string& pointer, std::string& tmsi) {
+  if (uePagingIdentity)
+    uePagingIdentity->getUEPagingIdentity(setid, pointer, tmsi);
+}
+
+//------------------------------------------------------------------------------
+void PagingMsg::setTAIListForPaging(const std::vector<struct Tai_s> list) {
+  if (list.size() == 0) {
+    cout << "[Warning] Setup failed, vector is empty!!!" << endl;
+    return;
+  }
+  if (!taIListForPaging) taIListForPaging = new TAIListForPaging();
+
+  TAI tai[list.size()];
+  PlmnId plmnid[list.size()];
+  TAC tac[list.size()];
+  for (int i = 0; i < list.size(); i++) {
+    plmnid[i].setMccMnc(list[i].mcc, list[i].mnc);
+    tac[i].setTac(list[i].tac);
+    tai[i].setTAI(&plmnid[i], &tac[i]);
+  }
+  taIListForPaging->setTAIListForPaging(tai, list.size());
+
+  Ngap_PagingIEs_t* ie =
+      (Ngap_PagingIEs_t*) calloc(1, sizeof(Ngap_PagingIEs_t));
+  ie->id            = Ngap_ProtocolIE_ID_id_TAIListForPaging;
+  ie->criticality   = Ngap_Criticality_ignore;
+  ie->value.present = Ngap_PagingIEs__value_PR_TAIListForPaging;
+
+  int ret = taIListForPaging->encode2TAIListForPaging(
+      &ie->value.choice.TAIListForPaging);
+  if (!ret) {
+    cout << "encode TAIListForPaging IE error" << endl;
+    return;
+  }
+
+  ret = ASN_SEQUENCE_ADD(&pagingIEs->protocolIEs.list, ie);
+  if (ret != 0) cout << "encode TAIListForPaging IE error" << endl;
+}
+
+//------------------------------------------------------------------------------
+void PagingMsg::getTAIListForPaging(std::vector<struct Tai_s>& list) {
+  if (!taIListForPaging) return;
+  TAI* tailist      = nullptr;
+  int sizeoftailist = 0;
+  taIListForPaging->getTAIListForPaging(tailist, sizeoftailist);
+
+  for (int i = 0; i < sizeoftailist; i++) {
+    Tai_t tai      = {};
+    PlmnId* plmnid = nullptr;
+    TAC* tac       = nullptr;
+    tailist[i].getTAI(plmnid, tac);
+    plmnid->getMcc(tai.mcc);
+    plmnid->getMnc(tai.mnc);
+    tai.tac = tac->getTac();
+
+    list.push_back(tai);
+  }
+}
+
+}  // namespace ngap

src/ngap/ngapMsgs/Paging.hpp

+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this
+ * file except in compliance with the License. You may obtain a copy of the
+ * License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#ifndef _PAGING_H_
+#define _PAGING_H_
+
+#include "NgapIEsStruct.hpp"
+
+#include "MessageType.hpp"
+#include "UEPagingIdentity.hpp"
+#include "TAIListforPaging.hpp"
+
+extern "C" {
+#include "Ngap_NGAP-PDU.h"
+#include "Ngap_ProtocolIE-Field.h"
+#include "Ngap_Paging.h"
+}
+
+namespace ngap {
+
+class PagingMsg {
+ public:
+  PagingMsg();
+  virtual ~PagingMsg();
+
+  void setMessageType();
+  int encode2buffer(uint8_t* buf, int buf_size);
+  bool decodefrompdu(Ngap_NGAP_PDU_t* ngap_msg_pdu);
+
+  void setUEPagingIdentity(
+      std::string SetId, std::string Pointer, std::string tmsi);
+  void getUEPagingIdentity(std::string& _5g_s_tmsi);
+  void getUEPagingIdentity(
+      std::string& setid, std::string& pointer, std::string& tmsi);
+
+  void setTAIListForPaging(const std::vector<struct Tai_s> list);
+  void getTAIListForPaging(std::vector<struct Tai_s>& list);
+
+ private:
+  Ngap_NGAP_PDU_t* pagingPdu;
+  Ngap_Paging_t* pagingIEs;
+
+  UEPagingIdentity* uePagingIdentity;
+  TAIListForPaging* taIListForPaging;
+  // Paging DRX
+  // Paging Priority
+  // UE Radio Capability for Paging
+  // Paging Origin
+  // Assistance Data for Paging
+};
+
+}  // namespace ngap
+
+#endif

src/sbi/amf_server/impl/N1N2MessageCollectionDocumentApiImpl.cpp

@@ -72,7 +72,11 @@ void N1N2MessageCollectionDocumentApiImpl::n1_n2_message_transfer(
     Pistache::Http::ResponseWriter& response) {
   Logger::amf_server().debug(
       "Receive N1N2MessageTransfer Request, handling...");
-  response.send(Pistache::Http::Code::Ok, "OK");
+
+  nlohmann::json response_json = {};
+  response_json["cause"] =
+      n1_n2_message_transfer_cause_e2str[N1_N2_TRANSFER_INITIATED];
+  Pistache::Http::Code code = Pistache::Http::Code::Ok;
 
   std::string supi = ueContextId;
   Logger::amf_server().debug(
@@ -108,6 +112,22 @@ void N1N2MessageCollectionDocumentApiImpl::n1_n2_message_transfer(
   itti_msg->is_n2sm_set = true;
   itti_msg->pdu_session_id =
       (uint8_t) n1N2MessageTransferReqData.getPduSessionId();
+
+  // For Paging
+  if (n1N2MessageTransferReqData.ppiIsSet()) {
+    itti_msg->is_ppi_set = true;
+    itti_msg->ppi        = n1N2MessageTransferReqData.getPpi();
+    response_json["cause"] =
+        n1_n2_message_transfer_cause_e2str[ATTEMPTING_TO_REACH_UE];
+    code = Pistache::Http::Code::Accepted;
+  } else {
+    itti_msg->is_ppi_set = false;
+  }
+
+  // Send response to the NF Service Consumer (e.g., SMF)
+  response.send(code, response_json.dump().c_str());
+
+  // Process N1N2 Message Transfer Request
   std::shared_ptr<itti_n1n2_message_transfer_request> i =
       std::shared_ptr<itti_n1n2_message_transfer_request>(itti_msg);
   int ret = itti_inst->send_msg(i);