X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?p=sim%2Fe2-interface.git;a=blobdiff_plain;f=e2sim%2Fe2apv1sim%2Fe2sim%2Fe2sim.cpp;fp=e2sim%2Fe2apv1sim%2Fe2sim%2Fe2sim.cpp;h=145556e10bb0f535644c3b49b59aeff599771b4d;hp=0000000000000000000000000000000000000000;hb=3ebf932d23dcbec9ed19f4a51f9d00a0a54f5124;hpb=6896318f2b4ff01b4a88b16019c3dc93b0b693f5

diff --git a/e2sim/e2apv1sim/e2sim/e2sim.cpp b/e2sim/e2apv1sim/e2sim/e2sim.cpp
new file mode 100644
index 0000000..145556e
--- /dev/null
+++ b/e2sim/e2apv1sim/e2sim/e2sim.cpp
@@ -0,0 +1,185 @@
+/*****************************************************************************
+#                                                                            *
+# 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 <fstream>
+#include <vector>
+
+#include "e2sim.hpp"
+#include "e2sim_defs.h"
+#include "e2sim_sctp.hpp"
+#include "e2ap_message_handler.hpp"
+#include "encode_e2apv1.hpp"
+
+using namespace std;
+
+int client_fd = 0;
+
+void E2Sim::register_subscription_callback(long func_id, SubscriptionCallback cb) {
+  printf("%%%%about to register callback for subscription for func_id %d\n", func_id);
+  subscription_callbacks[func_id] = cb;
+  
+}
+
+SubscriptionCallback E2Sim::get_subscription_callback(long func_id) {
+  printf("%%%%we are getting the subscription callback for func id %d\n", func_id);
+  SubscriptionCallback cb = subscription_callbacks[func_id];
+  return cb;
+
+}
+
+void E2Sim::register_e2sm(long func_id, OCTET_STRING_t *ostr) {
+
+  //Error conditions:
+  //If we already have an entry for func_id
+  
+  printf("%%%%about to register e2sm func desc for %d\n", func_id);
+
+  ran_functions_registered[func_id] = ostr;
+
+}
+
+
+void E2Sim::encode_and_send_sctp_data(E2AP_PDU_t* pdu)
+{
+  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 E2Sim::wait_for_sctp_data()
+{
+  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, this);
+  }
+}
+
+
+int E2Sim::run_loop(int argc, char* argv[]){
+
+  printf("Start E2 Agent (E2 Simulator\n");
+
+  ifstream simfile;
+  string line;
+
+  simfile.open("simulation.txt", ios::in);
+
+  if (simfile.is_open()) {
+
+    while (getline(simfile, line)) {
+      cout << line << "\n";
+    }
+
+    simfile.close();
+
+  }
+
+  bool xmlenc = false;
+
+  options_t ops = read_input_options(argc, argv);
+
+  printf("After reading input options\n");
+
+  //E2 Agent will automatically restart upon sctp disconnection
+  //  int server_fd = sctp_start_server(ops.server_ip, ops.server_port);
+
+  client_fd = sctp_start_client(ops.server_ip, ops.server_port);
+  E2AP_PDU_t* pdu_setup = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
+
+  printf("After starting client\n");
+  printf("client_fd value is %d\n", client_fd);
+  
+  std::vector<ran_func_info> all_funcs;
+
+  //Loop through RAN function definitions that are registered
+
+  for (std::pair<long, OCTET_STRING_t*> elem : ran_functions_registered) {
+    printf("looping through ran func\n");
+    ran_func_info next_func;
+
+    next_func.ranFunctionId = elem.first;
+    next_func.ranFunctionDesc = elem.second;
+    next_func.ranFunctionRev = (long)2;
+    all_funcs.push_back(next_func);
+  }
+    
+  printf("about to call setup request encode\n");
+  
+  generate_e2apv1_setup_request_parameterized(pdu_setup, all_funcs);
+
+  printf("After generating e2setup req\n");
+
+  xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_setup);
+
+  printf("After XER Encoding\n");
+
+  auto buffer_size = MAX_SCTP_BUFFER;
+  unsigned char buffer[MAX_SCTP_BUFFER];
+  
+  sctp_buffer_t data;
+
+  char *error_buf = (char*)calloc(300, sizeof(char));
+  size_t errlen;
+
+  asn_check_constraints(&asn_DEF_E2AP_PDU, pdu_setup, error_buf, &errlen);
+  printf("error length %d\n", errlen);
+  printf("error buf %s\n", error_buf);
+
+  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(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, this);
+    if (xmlenc) xmlenc = false;
+  }
+
+  return 0;
+}