1 /*****************************************************************************
3 # Copyright 2020 AT&T Intellectual Property *
4 # Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved. *
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 *
10 # http://www.apache.org/licenses/LICENSE-2.0 *
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. *
18 ******************************************************************************/
28 #include "e2sim_defs.h"
29 #include "e2sim_sctp.hpp"
30 #include "e2ap_message_handler.hpp"
31 #include "encode_e2apv1.hpp"
37 std::unordered_map<long, OCTET_STRING_t*> E2Sim::getRegistered_ran_functions() {
38 return ran_functions_registered;
41 void E2Sim::register_subscription_callback(long func_id, SubscriptionCallback cb) {
42 fprintf(stderr,"%%%%about to register callback for subscription for func_id %d\n", func_id);
43 subscription_callbacks[func_id] = cb;
47 SubscriptionCallback E2Sim::get_subscription_callback(long func_id) {
48 fprintf(stderr, "%%%%we are getting the subscription callback for func id %d\n", func_id);
49 SubscriptionCallback cb;
52 cb = subscription_callbacks.at(func_id);
53 } catch(const std::out_of_range& e) {
54 throw std::out_of_range("Function ID is not registered");
60 void E2Sim::register_e2sm(long func_id, OCTET_STRING_t *ostr) {
63 //If we already have an entry for func_id
65 printf("%%%%about to register e2sm func desc for %d\n", func_id);
67 ran_functions_registered[func_id] = ostr;
72 void E2Sim::encode_and_send_sctp_data(E2AP_PDU_t* pdu)
77 data.len = e2ap_asn1c_encode_pdu(pdu, &buf);
78 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
81 sctp_send_data(client_fd, data);
85 void E2Sim::wait_for_sctp_data()
87 sctp_buffer_t recv_buf;
88 if(sctp_receive_data(client_fd, recv_buf) > 0)
90 LOG_I("[SCTP] Received new data of size %d", recv_buf.len);
91 e2ap_handle_sctp_data(client_fd, recv_buf, false, this);
97 void E2Sim::generate_e2apv1_subscription_response_success(E2AP_PDU *e2ap_pdu, long reqActionIdsAccepted[], long reqActionIdsRejected[], int accept_size, int reject_size, long reqRequestorId, long reqInstanceId) {
98 encoding::generate_e2apv1_subscription_response_success(e2ap_pdu, reqActionIdsAccepted, reqActionIdsRejected, accept_size, reject_size, reqRequestorId, reqInstanceId);
101 void E2Sim::generate_e2apv1_indication_request_parameterized(E2AP_PDU *e2ap_pdu, long requestorId, long instanceId, long ranFunctionId, long actionId, long seqNum, uint8_t *ind_header_buf, int header_length, uint8_t *ind_message_buf, int message_length) {
102 encoding::generate_e2apv1_indication_request_parameterized(e2ap_pdu, requestorId, instanceId, ranFunctionId, actionId, seqNum, ind_header_buf, header_length, ind_message_buf, message_length);
106 int E2Sim::run_loop(int argc, char* argv[]){
108 printf("Start E2 Agent (E2 Simulator\n");
113 simfile.open("simulation.txt", ios::in);
115 if (simfile.is_open()) {
117 while (getline(simfile, line)) {
118 cout << line << "\n";
127 options_t ops = read_input_options(argc, argv);
129 printf("After reading input options\n");
131 //E2 Agent will automatically restart upon sctp disconnection
132 // int server_fd = sctp_start_server(ops.server_ip, ops.server_port);
134 client_fd = sctp_start_client(ops.server_ip, ops.server_port);
135 E2AP_PDU_t* pdu_setup = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
137 printf("After starting client\n");
138 printf("client_fd value is %d\n", client_fd);
140 std::vector<encoding::ran_func_info> all_funcs;
142 //Loop through RAN function definitions that are registered
144 for (std::pair<long, OCTET_STRING_t*> elem : ran_functions_registered) {
145 printf("looping through ran func\n");
146 encoding::ran_func_info next_func;
148 next_func.ranFunctionId = elem.first;
149 next_func.ranFunctionDesc = elem.second;
150 next_func.ranFunctionRev = (long)2;
151 all_funcs.push_back(next_func);
154 printf("about to call setup request encode\n");
156 generate_e2apv1_setup_request_parameterized(pdu_setup, all_funcs);
158 printf("After generating e2setup req\n");
160 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_setup);
162 printf("After XER Encoding\n");
164 auto buffer_size = MAX_SCTP_BUFFER;
165 unsigned char buffer[MAX_SCTP_BUFFER];
169 char error_buf[300] = {0, };
172 asn_check_constraints(&asn_DEF_E2AP_PDU, pdu_setup, error_buf, &errlen);
173 printf("error length %d\n", errlen);
174 printf("error buf %s\n", error_buf);
176 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_setup, buffer, buffer_size);
178 data.len = er.encoded;
180 fprintf(stderr, "er encded is %d\n", er.encoded);
182 memcpy(data.buffer, buffer, er.encoded);
184 if(sctp_send_data(client_fd, data) > 0) {
185 LOG_I("[SCTP] Sent E2-SETUP-REQUEST");
187 LOG_E("[SCTP] Unable to send E2-SETUP-REQUEST to peer");
190 sctp_buffer_t recv_buf;
192 LOG_I("[SCTP] Waiting for SCTP data");
194 while(1) //constantly looking for data on SCTP interface
196 if(sctp_receive_data(client_fd, recv_buf) <= 0)
199 LOG_I("[SCTP] Received new data of size %d", recv_buf.len);
201 e2ap_handle_sctp_data(client_fd, recv_buf, xmlenc, this);
202 if (xmlenc) xmlenc = false;