--- /dev/null
+/*****************************************************************************
+# *
+# 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 <stdio.h>
+#include <unistd.h>
+#include <assert.h>
+
+#include "e2sim_sctp.hpp"
+#include "e2ap_message_handler.hpp"
+
+extern "C" {
+ #include "e2sim_defs.h"
+ #include "E2AP-PDU.h"
+ #include "e2ap_asn1c_codec.h"
+}
+
+using namespace std;
+
+void encode_and_send_sctp_data(E2AP_PDU_t* pdu, int client_fd)
+{
+ uint8_t *buf;
+ sctp_buffer_t data;
+
+ data.len = e2ap_asn1c_encode_pdu(pdu, &buf);
+ memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
+
+ sctp_send_data(client_fd, data);
+}
+
+void wait_for_sctp_data(int client_fd)
+{
+ sctp_buffer_t recv_buf;
+ if(sctp_receive_data(client_fd, recv_buf) > 0)
+ {
+ LOG_I("[SCTP] Received new data of size %d", recv_buf.len);
+ e2ap_handle_sctp_data(client_fd, recv_buf);
+ }
+}
+
+int main(int argc, char* argv[]){
+ LOG_I("Start RIC Simulator");
+
+ options_t ops = read_input_options(argc, argv);
+ int client_fd = sctp_start_client(ops.server_ip, ops.server_port);
+
+ //1. Send ENDCX2Setup
+ E2AP_PDU_t* pdu_setup = e2ap_xml_to_pdu("E2AP_ENDCX2SetupRequest.xml");
+ e2ap_asn1c_print_pdu(pdu_setup);
+ encode_and_send_sctp_data(pdu_setup, client_fd);
+ LOG_I("[SCTP] Sent ENDC X2 SETUP REQUEST");
+
+ //2. Receive ENDCX2SetupResponse
+ wait_for_sctp_data(client_fd);
+
+ //3. Send RICSubscriptionRequest
+ E2AP_PDU_t* pdu_sub = e2ap_xml_to_pdu("E2AP_RICsubscriptionRequest_Ashwin.xml");
+ e2ap_asn1c_print_pdu(pdu_sub);
+ encode_and_send_sctp_data(pdu_sub, client_fd);
+ LOG_I("[SCTP] Sent RIC SUBSCRIPTION REQUEST");
+
+ //4. Receive RICSubscriptionResponse
+ while(1){
+ wait_for_sctp_data(client_fd);
+ }
+
+
+ //---------------------------------------
+ close(client_fd);
+ LOG_I("[SCTP] Connection closed.");
+
+ return 0;
+
+}