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"
32 #include "RANfunctionOID.h"
38 std::unordered_map<long, OCTET_STRING_t*> E2Sim::getRegistered_ran_functions() {
39 return ran_functions_registered;
42 void E2Sim::register_subscription_callback(long func_id, SubscriptionCallback cb) {
43 fprintf(stderr,"%%%%about to register callback for subscription for func_id %d\n", func_id);
44 subscription_callbacks[func_id] = cb;
48 SubscriptionCallback E2Sim::get_subscription_callback(long func_id) {
49 fprintf(stderr, "%%%%we are getting the subscription callback for func id %d\n", func_id);
50 SubscriptionCallback cb;
53 cb = subscription_callbacks.at(func_id);
54 } catch(const std::out_of_range& e) {
55 throw std::out_of_range("Function ID is not registered");
61 void E2Sim::register_e2sm(long func_id, OCTET_STRING_t *ostr) {
64 //If we already have an entry for func_id
66 printf("%%%%about to register e2sm func desc for %d\n", func_id);
68 ran_functions_registered[func_id] = ostr;
73 void E2Sim::encode_and_send_sctp_data(E2AP_PDU_t* pdu)
78 data.len = e2ap_asn1c_encode_pdu(pdu, &buf);
79 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
82 sctp_send_data(client_fd, data);
86 void E2Sim::wait_for_sctp_data()
88 sctp_buffer_t recv_buf;
89 if(sctp_receive_data(client_fd, recv_buf) > 0)
91 LOG_I("[SCTP] Received new data of size %d", recv_buf.len);
92 e2ap_handle_sctp_data(client_fd, recv_buf, false, this);
98 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) {
99 encoding::generate_e2apv1_subscription_response_success(e2ap_pdu, reqActionIdsAccepted, reqActionIdsRejected, accept_size, reject_size, reqRequestorId, reqInstanceId);
102 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) {
103 encoding::generate_e2apv1_indication_request_parameterized(e2ap_pdu, requestorId, instanceId, ranFunctionId, actionId, seqNum, ind_header_buf, header_length, ind_message_buf, message_length);
107 int E2Sim::run_loop(int argc, char* argv[]){
109 printf("Start E2 Agent (E2 Simulator\n");
114 simfile.open("simulation.txt", ios::in);
116 if (simfile.is_open()) {
118 while (getline(simfile, line)) {
119 cout << line << "\n";
128 options_t ops = read_input_options(argc, argv);
130 printf("After reading input options\n");
132 //E2 Agent will automatically restart upon sctp disconnection
133 // int server_fd = sctp_start_server(ops.server_ip, ops.server_port);
135 client_fd = sctp_start_client(ops.server_ip, ops.server_port);
136 E2AP_PDU_t* pdu_setup = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
138 printf("After starting client\n");
139 printf("client_fd value is %d\n", client_fd);
141 std::vector<encoding::ran_func_info> all_funcs;
142 RANfunctionOID_t *ranFunctionOIDe = (RANfunctionOID_t*)calloc(1,sizeof(RANfunctionOID_t));
143 uint8_t *buf = (uint8_t*)"OID123";
144 ranFunctionOIDe->buf = (uint8_t*)calloc(1,strlen((char*)buf)+1);
145 memcpy(ranFunctionOIDe->buf, buf, strlen((char*)buf)+1);
146 ranFunctionOIDe->size = strlen((char*)buf);
148 //Loop through RAN function definitions that are registered
150 for (std::pair<long, OCTET_STRING_t*> elem : ran_functions_registered) {
151 printf("looping through ran func\n");
152 encoding::ran_func_info next_func;
154 next_func.ranFunctionId = elem.first;
155 next_func.ranFunctionDesc = elem.second;
156 next_func.ranFunctionRev = (long)2;
157 next_func.ranFunctionOId = ranFunctionOIDe;
159 all_funcs.push_back(next_func);
162 printf("about to call setup request encode\n");
163 encoding::generate_e2apv2_config_update(pdu_setup);
164 // generate_e2apv1_setup_request_parameterized(pdu_setup, all_funcs);
166 printf("After generating e2setup req\n");
168 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_setup);
170 printf("After XER Encoding\n");
172 auto buffer_size = MAX_SCTP_BUFFER;
173 unsigned char buffer[MAX_SCTP_BUFFER];
177 char error_buf[300] = {0, };
180 asn_check_constraints(&asn_DEF_E2AP_PDU, pdu_setup, error_buf, &errlen);
181 printf("error length %d\n", errlen);
182 printf("error buf %s\n", error_buf);
184 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_setup, buffer, buffer_size);
186 data.len = er.encoded;
188 fprintf(stderr, "er encded is %d\n", er.encoded);
190 memcpy(data.buffer, buffer, er.encoded);
192 if(sctp_send_data(client_fd, data) > 0) {
193 LOG_I("[SCTP] Sent E2-SETUP-REQUEST");
195 LOG_E("[SCTP] Unable to send E2-SETUP-REQUEST to peer");
198 sctp_buffer_t recv_buf;
200 LOG_I("[SCTP] Waiting for SCTP data");
202 while(1) //constantly looking for data on SCTP interface
204 if(sctp_receive_data(client_fd, recv_buf) <= 0)
207 LOG_I("[SCTP] Received new data of size %d", recv_buf.len);
209 e2ap_handle_sctp_data(client_fd, recv_buf, xmlenc, this);
210 if (xmlenc) xmlenc = false;