Add initial codes

[it/test.git] / simulators / e2sim / src / E2AP / e2ap_message_handler.cpp

diff --git a/simulators/e2sim/src/E2AP/e2ap_message_handler.cpp b/simulators/e2sim/src/E2AP/e2ap_message_handler.cpp
new file mode 100644 (file)
index 0000000..d511949
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+++ b/simulators/e2sim/src/E2AP/e2ap_message_handler.cpp
@@ -0,0 +1,240 @@
+/*****************************************************************************\r
+#                                                                            *\r
+# Copyright 2019 AT&T Intellectual Property                                  *\r
+# Copyright 2019 Nokia                                                       *\r
+#                                                                            *\r
+# Licensed under the Apache License, Version 2.0 (the "License");            *\r
+# you may not use this file except in compliance with the License.           *\r
+# You may obtain a copy of the License at                                    *\r
+#                                                                            *\r
+#      http://www.apache.org/licenses/LICENSE-2.0                            *\r
+#                                                                            *\r
+# Unless required by applicable law or agreed to in writing, software        *\r
+# distributed under the License is distributed on an "AS IS" BASIS,          *\r
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   *\r
+# See the License for the specific language governing permissions and        *\r
+# limitations under the License.                                             *\r
+#                                                                            *\r
+******************************************************************************/\r
+#include "e2ap_message_handler.hpp"\r
+\r
+void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data)\r
+{\r
+  //decode the data into E2AP-PDU\r
+  e2ap_pdu_t* pdu = new_e2ap_pdu();\r
+\r
+  e2ap_decode_pdu(pdu, data.buffer, data.len);\r
+\r
+  e2ap_print_pdu(pdu);\r
+\r
+  int index = e2ap_get_index(pdu);\r
+  int procedureCode = e2ap_get_procedureCode(pdu);\r
+\r
+  LOG_I("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n", index, procedureCode);\r
+\r
+  switch(procedureCode)\r
+  {\r
+    case 6: //X2Setup\r
+      switch(index)\r
+      {\r
+        case 1: //initiatingMessage\r
+          LOG_D("[E2AP] Received X2-SETUP-REQUEST");\r
+          e2ap_handle_X2SetupRequest(pdu, socket_fd);\r
+          break;\r
+\r
+        case 2: //successfulOutcome\r
+          LOG_D("[E2AP] Received X2-SETUP-RESPONSE");\r
+          //e2ap_handle_X2SetupResponse(pdu, socket_fd);\r
+          break;\r
+\r
+        case 3:\r
+          break;\r
+\r
+        default:\r
+          LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);\r
+          break;\r
+      }\r
+      break;\r
+\r
+    case 36: //ENDCX2Setup\r
+      switch(index)\r
+      {\r
+        case 1: //initiatingMessage\r
+          LOG_D("[E2AP] Received ENDC-X2-SETUP-REQUEST");\r
+          e2ap_handle_ENDCX2SetupRequest(pdu, socket_fd);\r
+          break;\r
+\r
+        case 2: //successfulOutcome\r
+          LOG_D("[E2AP] Received ENDC-X2-SETUP-RESPONSE");\r
+          //x2ap_handle_X2SetupResponse(pdu, socket_fd);\r
+          break;\r
+\r
+        case 3:\r
+          LOG_D("[E2AP] Received ENDC-X2-SETUP-FAILURE");\r
+          break;\r
+\r
+        default:\r
+          LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);\r
+          break;\r
+      }\r
+      break;\r
+\r
+    case 201: //RIC SUBSCRIPTION\r
+      switch(index)\r
+      {\r
+        case 1: //initiatingMessage\r
+          LOG_D("[E2AP] Received RIC-SUBSCRIPTION-REQUEST");\r
+          e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);\r
+          break;\r
+\r
+        case 2:\r
+          LOG_D("[E2AP] Received RIC-SUBSCRIPTION-RESPONSE");\r
+          break;\r
+\r
+        case 3:\r
+          LOG_D("[E2AP] Received RIC-SUBSCRIPTION-FAILURE");\r
+          break;\r
+\r
+        default:\r
+        LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);\r
+        break;\r
+      }\r
+      break;\r
+\r
+    default:\r
+      LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);\r
+      break;\r
+  }\r
+}\r
+\r
+void e2ap_handle_X2SetupRequest(e2ap_pdu_t* pdu, int &socket_fd)\r
+{\r
+  /*\r
+  Simply send back X2SetupResponse\r
+  Todo: add more handling options (failure, duplicated request, etc.)\r
+  */\r
+\r
+  e2ap_pdu_t* res_pdu = new_e2ap_pdu();\r
+  eNB_config cfg;\r
+\r
+  e2ap_create_X2SetupResponse(res_pdu, cfg);\r
+  LOG_D("[E2AP] Created X2-SETUP-RESPONSE")\r
+\r
+  e2ap_print_pdu(res_pdu);\r
+\r
+  //encode response pdu into buffer\r
+  sctp_buffer_t res_data;\r
+  e2ap_encode_pdu(res_pdu, res_data.buffer, sizeof(res_data.buffer), res_data.len);\r
+\r
+  //send response data over sctp\r
+  if(sctp_send_data(socket_fd, res_data) > 0) {\r
+    LOG_I("[SCTP] Sent X2-SETUP-RESPONSE");\r
+  } else {\r
+    LOG_E("[SCTP] Unable to send X2-SETUP-RESPONSE to peer");\r
+  }\r
+}\r
+\r
+void e2ap_handle_X2SetupResponse(e2ap_pdu_t* pdu, int &socket_fd)\r
+{\r
+  ;\r
+}\r
+\r
+void e2ap_handle_ENDCX2SetupRequest(e2ap_pdu_t* pdu, int &socket_fd)\r
+{\r
+  /*\r
+  Simply send back ENDCX2SetupResponse\r
+  Todo: add more handling options (failure, duplicated request, etc.)\r
+  */\r
+\r
+  e2ap_pdu_t* res_pdu = new_e2ap_pdu();\r
+  gNB_config gnb_cfg;\r
+\r
+  e2ap_create_ENDCX2SetupResponse(res_pdu, gnb_cfg);\r
+  LOG_D("[E2AP] Created ENDC-X2-SETUP-RESPONSE");\r
+\r
+  e2ap_print_pdu(res_pdu);\r
+\r
+  sctp_buffer_t data;\r
+  e2ap_encode_pdu(res_pdu, data.buffer, sizeof(data.buffer), data.len);\r
+\r
+  //send response data over sctp\r
+  if(sctp_send_data(socket_fd, data) > 0) {\r
+    LOG_I("[SCTP] Sent ENDC-X2-SETUP-RESPONSE");\r
+  } else {\r
+    LOG_E("[SCTP] Unable to send ENDC-X2-SETUP-RESPONSE to peer");\r
+  }\r
+}\r
+\r
+void e2ap_handle_RICSubscriptionRequest(e2ap_pdu_t* pdu, int &socket_fd)\r
+{\r
+  RICsubscription_params_t params;\r
+  e2ap_parse_RICsubscriptionRequest(pdu, params);\r
+\r
+  /* Example handling logic\r
+  - Accept if request id is even-numbered -> send back response\r
+    in this case, accept every other actions\r
+\r
+  - Reject if request id is odd-numbered -> send back failure\r
+  */\r
+\r
+  e2ap_pdu_t* res_pdu = new_e2ap_pdu();\r
+  bool is_failure = false;\r
+\r
+  if(params.request_id % 2 == 0)\r
+  {\r
+    for(size_t i = 0; i < params.actionList.size(); i++)\r
+    {\r
+      if(i%2 == 0){\r
+        params.actionList[i].isAdmitted = true;\r
+      } else {\r
+        params.actionList[i].isAdmitted = false;\r
+        params.actionList[i].notAdmitted_cause = RICcause_radioNetwork;\r
+        params.actionList[i].notAdmitted_subCause = 5;\r
+      }\r
+    }\r
+\r
+    e2ap_create_RICsubscriptionResponse(res_pdu, params);\r
+    LOG_I("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");\r
+  }\r
+  else\r
+  {\r
+    is_failure = true;\r
+\r
+    for(size_t i = 0; i < params.actionList.size(); i++)\r
+    {\r
+      params.actionList[i].isAdmitted = false;\r
+      params.actionList[i].notAdmitted_cause = RICcause_radioNetwork;\r
+      params.actionList[i].notAdmitted_subCause = 5;\r
+    }\r
+\r
+    e2ap_create_RICsubscriptionFailure(res_pdu, params);\r
+    LOG_I("[E2AP] Created RIC-SUBSCRIPTION-FAILURE");\r
+  }\r
+\r
+  e2ap_print_pdu(res_pdu);\r
+\r
+  //Encode into buffer\r
+  sctp_buffer_t data;\r
+  e2ap_encode_pdu(res_pdu, data.buffer, sizeof(data.buffer), data.len);\r
+\r
+  //send response data over sctp\r
+  if(sctp_send_data(socket_fd, data) > 0)\r
+  {\r
+    if(is_failure) {\r
+      LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-FAILURE");\r
+    }\r
+    else {\r
+      LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");\r
+    }\r
+  }\r
+  else\r
+  {\r
+    if(is_failure) {\r
+      LOG_I("[SCTP] Unable to send RIC-SUBSCRIPTION-FAILURE");\r
+    }\r
+    else {\r
+      LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE");\r
+    }\r
+  }\r
+\r
+}\r