Enhanced SIM for E2AP v1 for TS UC

[sim/e2-interface.git] / e2sim / e2apv1sim / e2sim.cpp

diff --git a/e2sim/e2apv1sim/e2sim.cpp b/e2sim/e2apv1sim/e2sim.cpp
new file mode 100644 (file)
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+++ b/e2sim/e2apv1sim/e2sim.cpp
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+/*****************************************************************************
+#                                                                            *
+# 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 <string>
+#include <iostream>
+
+
+#include "e2sim_defs.h"
+#include "e2sim_sctp.hpp"
+#include "e2ap_message_handler.hpp"
+#include "encode_e2apv1.hpp"
+
+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, false);
+  }
+}
+
+
+int main(int argc, char* argv[]){
+  LOG_I("Start E2 Agent (E2 Simulator)");
+
+  bool xmlenc = true;
+
+  options_t ops = read_input_options(argc, argv);
+
+  //E2 Agent will automatically restart upon sctp disconnection
+  //  int server_fd = sctp_start_server(ops.server_ip, ops.server_port);
+  int client_fd = sctp_start_client(ops.server_ip, ops.server_port);
+  E2AP_PDU_t* pdu_setup = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
+
+  //  generate_e2apv1_subscription_request(pdu_setup);
+  generate_e2apv1_setup_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);
+  auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &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(client_fd, data) > 0) {
+    LOG_I("[SCTP] Sent E2-SETUP-REQUEST");
+  } else {
+    LOG_E("[SCTP] Unable to send E2-SETUP-REQUEST to peer");
+  }
+
+  sctp_buffer_t recv_buf;
+
+  LOG_I("[SCTP] Waiting for SCTP data");
+
+  while(1) //constantly looking for data on SCTP interface
+  {
+    if(sctp_receive_data(client_fd, recv_buf) <= 0)
+      break;
+
+    LOG_I("[SCTP] Received new data of size %d", recv_buf.len);
+
+    e2ap_handle_sctp_data(client_fd, recv_buf, xmlenc);
+    if (xmlenc) xmlenc = false;
+  }
+
+  return 0;
+}