X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?p=sim%2Fe2-interface.git;a=blobdiff_plain;f=e2sim%2Fe2apv1sim%2Fsrc%2FE2AP%2Fe2ap_message_handler.cpp;fp=e2sim%2Fe2apv1sim%2Fsrc%2FE2AP%2Fe2ap_message_handler.cpp;h=c1f620b2abeb38d96f61b0feedf4148edeea17a7;hp=0000000000000000000000000000000000000000;hb=0eba05c4ff0c99974d3f3a63b65cbe2adb209e51;hpb=c380e183231711cf9f8bc72d0eb52e532dd07085

diff --git a/e2sim/e2apv1sim/src/E2AP/e2ap_message_handler.cpp b/e2sim/e2apv1sim/src/E2AP/e2ap_message_handler.cpp
new file mode 100644
index 0000000..c1f620b
--- /dev/null
+++ b/e2sim/e2apv1sim/src/E2AP/e2ap_message_handler.cpp
@@ -0,0 +1,361 @@
+/*****************************************************************************
+#                                                                            *
+# Copyright 2019 AT&T Intellectual Property                                  *
+# Copyright 2019 Nokia                                                       *
+#                                                                            *
+# Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0                            *
+#                                                                            *
+# 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.                                             *
+#                                                                            *
+******************************************************************************/
+#include "e2ap_message_handler.hpp"
+#include <unistd.h>
+#include "encode_e2apv1.hpp"
+
+void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data, bool xmlenc)
+{
+  fprintf(stderr, "in e2ap_handle_sctp_data()\n");
+  //decode the data into E2AP-PDU
+  E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
+  ASN_STRUCT_RESET(asn_DEF_E2AP_PDU, pdu);
+
+  fprintf(stderr, "decoding...\n");
+
+  asn_transfer_syntax syntax;
+  
+  if (!xmlenc) 
+    syntax = ATS_ALIGNED_BASIC_PER;
+  else
+    syntax = ATS_BASIC_XER;
+
+  //  e2ap_asn1c_decode_pdu(pdu, data.buffer, data.len);
+
+  auto rval = asn_decode(nullptr, syntax, &asn_DEF_E2AP_PDU, (void **) &pdu,
+		    data.buffer, data.len);
+  
+
+  int index = (int)pdu->present;
+  fprintf(stderr, "length of data %d\n", rval.consumed);
+  fprintf(stderr, "result %d\n", rval.code);
+  fprintf(stderr, "index is %d\n", index);
+  
+  fprintf(stderr, "showing xer of data\n");  
+  
+  xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu);
+  
+  int procedureCode = e2ap_asn1c_get_procedureCode(pdu);
+  index = (int)pdu->present;
+
+  LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",
+                            index, procedureCode);
+
+  switch(procedureCode)
+    {
+      
+    case ProcedureCode_id_E2setup:
+      switch(index)
+	{
+        case E2AP_PDU_PR_initiatingMessage:
+	  e2ap_handle_E2SetupRequest(pdu, socket_fd);	  
+          LOG_I("[E2AP] Received SETUP-REQUEST");
+          break;
+	  
+        case E2AP_PDU_PR_successfulOutcome:
+          LOG_I("[E2AP] Received SETUP-RESPONSE-SUCCESS");	  
+          break;
+	  
+        case E2AP_PDU_PR_unsuccessfulOutcome:
+          LOG_I("[E2AP] Received SETUP-RESPONSE-FAILURE");
+          break;
+	  
+        default:
+          LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
+          break;
+	}
+      break;    
+      
+    case ProcedureCode_id_Reset: //reset = 7
+      switch(index)
+	{
+        case E2AP_PDU_PR_initiatingMessage:
+          LOG_I("[E2AP] Received RESET-REQUEST");
+          break;
+	  
+        case E2AP_PDU_PR_successfulOutcome:
+          break;
+	  
+        case E2AP_PDU_PR_unsuccessfulOutcome:
+          break;
+	  
+        default:
+          LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
+          break;
+	}
+      break;
+      
+    case ProcedureCode_id_RICsubscription: //RIC SUBSCRIPTION = 201
+      switch(index)
+	{
+        case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
+          LOG_I("[E2AP] Received RIC-SUBSCRIPTION-REQUEST");
+          e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
+	  //          e2ap_handle_RICSubscriptionRequest_securityDemo(pdu, socket_fd);
+          break;
+	  
+        case E2AP_PDU_PR_successfulOutcome:
+          LOG_I("[E2AP] Received RIC-SUBSCRIPTION-RESPONSE");
+          break;
+	  
+        case E2AP_PDU_PR_unsuccessfulOutcome:
+          LOG_I("[E2AP] Received RIC-SUBSCRIPTION-FAILURE");
+          break;
+	  
+        default:
+          LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
+          break;
+	}
+      break;
+
+    case ProcedureCode_id_RICindication: // 205
+      switch(index)
+	{
+        case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
+          LOG_I("[E2AP] Received RIC-INDICATION-REQUEST");
+          // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
+          break;
+        case E2AP_PDU_PR_successfulOutcome:
+          LOG_I("[E2AP] Received RIC-INDICATION-RESPONSE");
+          break;
+	  
+        case E2AP_PDU_PR_unsuccessfulOutcome:
+          LOG_I("[E2AP] Received RIC-INDICATION-FAILURE");
+          break;
+	  
+        default:
+          LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
+                                    (int)ProcedureCode_id_RICindication);
+          break;
+	}
+      break;
+      
+    default:
+      
+      LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);
+      /*
+      fprintf(stderr, "sending subscription request\n");
+      E2AP_PDU_t* sub_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
+      generate_e2apv1_subscription_request(sub_pdu);
+
+      auto buffer_size = MAX_SCTP_BUFFER;
+      unsigned char buffer[MAX_SCTP_BUFFER];
+      
+      sctp_buffer_t data;
+
+      auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, sub_pdu, buffer, buffer_size);
+
+      data.len = er.encoded;
+      
+      fprintf(stderr, "er encded is %d\n", er.encoded);
+      
+      memcpy(data.buffer, buffer, er.encoded);
+
+      if(sctp_send_data(socket_fd, data) > 0) {
+	LOG_I("[SCTP] Sent E2-SUBSCRIPTION-REQUEST");
+      } else {
+	LOG_E("[SCTP] Unable to send E2-SUBSCRIPTION-REQUEST to peer");
+      }
+      */
+      break;
+    }
+}
+
+void e2ap_handle_E2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd) {
+
+  
+  E2AP_PDU_t* res_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
+  generate_e2apv1_setup_response(res_pdu);
+
+  
+  LOG_D("[E2AP] Created E2-SETUP-RESPONSE");
+
+  e2ap_asn1c_print_pdu(res_pdu);
+
+
+  auto buffer_size = MAX_SCTP_BUFFER;
+  unsigned char buffer[MAX_SCTP_BUFFER];
+  
+  sctp_buffer_t data;
+  auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, res_pdu, buffer, buffer_size);
+
+  data.len = er.encoded;
+  fprintf(stderr, "er encoded is %d\n", er.encoded);  
+  
+  //data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
+  memcpy(data.buffer, buffer, er.encoded);
+
+  //send response data over sctp
+  if(sctp_send_data(socket_fd, data) > 0) {
+    LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
+  } else {
+    LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
+  }
+
+  sleep(5);
+
+  //Sending Subscription Request
+
+  E2AP_PDU_t* pdu_sub = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
+
+  //  generate_e2apv1_subscription_request(pdu_setup);
+  generate_e2apv1_subscription_request(pdu_sub);
+
+  xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_sub);
+
+  auto buffer_size2 = MAX_SCTP_BUFFER;
+  unsigned char buffer2[MAX_SCTP_BUFFER];
+  
+  sctp_buffer_t data2;
+
+  //  auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_sub, buffer, buffer_size);
+  auto er2 = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, pdu_sub, buffer, buffer_size);
+  
+  data2.len = er2.encoded;
+  memcpy(data2.buffer, buffer2, er2.encoded);
+  
+  fprintf(stderr, "er encded is %d\n", er2.encoded);
+
+  /*
+  fprintf(stderr, "now that we've encoded....let's decode!!\n");
+  E2AP_PDU_t* pdu_sub2 = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
+
+  //  auto er3 = asn_decode(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, (void **) &pdu_sub2,  
+  auto er3 = asn_decode(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, (void **) &pdu_sub2,
+			 data2.buffer, data2.len);
+
+  int index = (int)pdu_sub2->present;
+  fprintf(stderr, "length of data %d\n", er3.consumed);
+  fprintf(stderr, "result %d\n", er3.code);
+  fprintf(stderr, "index is %d\n", index);
+  
+  fprintf(stderr, "showing xer of data\n");  
+  
+  xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_sub2);
+  int procedureCode = e2ap_asn1c_get_procedureCode(pdu_sub2);
+
+  LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",
+	index, procedureCode);  
+
+
+  */  
+
+  
+  
+  
+
+  if(sctp_send_data(socket_fd, data2) > 0) {
+    LOG_I("[SCTP] Sent E2-SUBSCRIPTION-REQUEST");
+  } else {
+    LOG_E("[SCTP] Unable to send E2-SUBSCRIPTION-REQUEST to peer");
+  }  
+
+
+}
+
+
+void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
+{
+  //Send back an Indication
+
+
+  E2AP_PDU_t* pdu_setup = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
+
+  generate_e2apv1_indication_request(pdu_setup);
+
+  xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_setup);
+
+  auto buffer_size = MAX_SCTP_BUFFER;
+  unsigned char buffer[MAX_SCTP_BUFFER];
+  
+  sctp_buffer_t data;
+
+  auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_setup, buffer, buffer_size);
+  data.len = er.encoded;
+
+  fprintf(stderr, "er encded is %d\n", er.encoded);
+
+  memcpy(data.buffer, buffer, er.encoded);
+
+  if(sctp_send_data(socket_fd, data) > 0) {
+    LOG_I("[SCTP] Sent E2-SETUP-REQUEST");
+  } else {
+    LOG_E("[SCTP] Unable to send E2-SETUP-REQUEST to peer");
+  }  
+
+}
+
+void e2ap_handle_RICSubscriptionRequest_securityDemo(E2AP_PDU_t* pdu, int &socket_fd)
+{
+  E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_RICsubscriptionResponse.xml");
+
+  LOG_D("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");
+
+  e2ap_asn1c_print_pdu(res_pdu);
+
+  uint8_t       *buf;
+  sctp_buffer_t data;
+
+  data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
+  memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
+
+  //send response data over sctp
+  if(sctp_send_data(socket_fd, data) > 0) {
+    LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
+  } else {
+    LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
+  }
+
+  //Start sending RIC Indication
+  int count1 = 0, count2 = 0;
+
+  E2AP_PDU_t* indication_type1 = e2ap_xml_to_pdu("E2AP_RICindication_type1.xml");
+  E2AP_PDU_t* indication_type2 = e2ap_xml_to_pdu("E2AP_RICindication_type2.xml");
+
+  uint8_t *buf1, *buf2;
+  sctp_buffer_t data1, data2;
+  data1.len = e2ap_asn1c_encode_pdu(indication_type1, &buf1);
+  memcpy(data1.buffer, buf1, min(data1.len, MAX_SCTP_BUFFER));
+
+  data2.len = e2ap_asn1c_encode_pdu(indication_type2, &buf2);
+  memcpy(data2.buffer, buf2, min(data2.len, MAX_SCTP_BUFFER));
+
+  while(1){
+    sleep(1);
+    //type1
+    if(sctp_send_data(socket_fd, data1) > 0) {
+      count1++;
+      LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 1, count1 = %d", count1);
+    } else {
+      LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");
+    }
+
+    sleep(1);
+    //type2
+    if(sctp_send_data(socket_fd, data2) > 0) {
+      count2++;
+      LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 2, count2 = %d", count2);
+    } else {
+      LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");
+    }
+  } //end while
+
+}
+
+