e2sim/ricsim.cpp

   1 /*****************************************************************************
   2 #                                                                            *
   3 # Copyright 2019 AT&T Intellectual Property                                  *
   4 # Copyright 2019 Nokia                                                       *
   5 #                                                                            *
   6 # Licensed under the Apache License, Version 2.0 (the "License");            *
   7 # you may not use this file except in compliance with the License.           *
   8 # You may obtain a copy of the License at                                    *
   9 #                                                                            *
  10 #      http://www.apache.org/licenses/LICENSE-2.0                            *
  11 #                                                                            *
  12 # Unless required by applicable law or agreed to in writing, software        *
  13 # distributed under the License is distributed on an "AS IS" BASIS,          *
  14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   *
  15 # See the License for the specific language governing permissions and        *
  16 # limitations under the License.                                             *
  17 #                                                                            *
  18 ******************************************************************************/
  19
  20 #include <stdio.h>
  21 #include <unistd.h>
  22 #include <assert.h>
  23
  24 #include "e2sim_sctp.hpp"
  25 #include "e2ap_message_handler.hpp"
  26
  27 extern "C" {
  28   #include "e2sim_defs.h"
  29   #include "E2AP-PDU.h"
  30   #include "e2ap_asn1c_codec.h"
  31 }
  32
  33 using namespace std;
  34
  35 void encode_and_send_sctp_data(E2AP_PDU_t* pdu, int client_fd)
  36 {
  37   uint8_t       *buf;
  38   sctp_buffer_t data;
  39
  40   data.len = e2ap_asn1c_encode_pdu(pdu, &buf);
  41   memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
  42
  43   sctp_send_data(client_fd, data);
  44 }
  45
  46 void wait_for_sctp_data(int client_fd)
  47 {
  48   sctp_buffer_t recv_buf;
  49   if(sctp_receive_data(client_fd, recv_buf) > 0)
  50   {
  51     LOG_I("[SCTP] Received new data of size %d", recv_buf.len);
  52     e2ap_handle_sctp_data(client_fd, recv_buf);
  53   }
  54 }
  55
  56 int main(int argc, char* argv[]){
  57   LOG_I("Start RIC Simulator");
  58
  59   options_t ops = read_input_options(argc, argv);
  60   int client_fd = sctp_start_client(ops.server_ip, ops.server_port);
  61
  62   //1. Send ENDCX2Setup
  63   E2AP_PDU_t* pdu_setup = e2ap_xml_to_pdu("E2AP_ENDCX2SetupRequest.xml");
  64   e2ap_asn1c_print_pdu(pdu_setup);
  65   encode_and_send_sctp_data(pdu_setup, client_fd);
  66   LOG_I("[SCTP] Sent ENDC X2 SETUP REQUEST");
  67
  68   //2. Receive ENDCX2SetupResponse
  69   wait_for_sctp_data(client_fd);
  70
  71   //3. Send RICSubscriptionRequest
  72   E2AP_PDU_t* pdu_sub = e2ap_xml_to_pdu("E2AP_RICsubscriptionRequest_Ashwin.xml");
  73   e2ap_asn1c_print_pdu(pdu_sub);
  74   encode_and_send_sctp_data(pdu_sub, client_fd);
  75   LOG_I("[SCTP] Sent RIC SUBSCRIPTION REQUEST");
  76
  77   //4. Receive RICSubscriptionResponse
  78   while(1){
  79     wait_for_sctp_data(client_fd);
  80   }
  81
  82
  83   //---------------------------------------
  84   close(client_fd);
  85   LOG_I("[SCTP] Connection closed.");
  86
  87   return 0;
  88
  89 }