3 /*****************************************************************************
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5 # Copyright 2020 AT&T Intellectual Property *
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6 # Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved. *
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8 # Licensed under the Apache License, Version 2.0 (the "License"); *
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9 # you may not use this file except in compliance with the License. *
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10 # You may obtain a copy of the License at *
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12 # http://www.apache.org/licenses/LICENSE-2.0 *
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14 # Unless required by applicable law or agreed to in writing, software *
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15 # distributed under the License is distributed on an "AS IS" BASIS, *
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16 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
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17 # See the License for the specific language governing permissions and *
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18 # limitations under the License. *
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20 ******************************************************************************/
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21 #include "e2ap_message_handler.hpp"
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23 //#include <iostream>
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26 #include "encode_e2apv1.hpp"
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31 void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data, bool xmlenc, E2Sim *e2sim)
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33 fprintf(stderr, "in e2ap_handle_sctp_data()\n");
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34 //decode the data into E2AP-PDU
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35 E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
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36 ASN_STRUCT_RESET(asn_DEF_E2AP_PDU, pdu);
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38 fprintf(stderr, "decoding...\n");
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40 asn_transfer_syntax syntax;
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43 syntax = ATS_ALIGNED_BASIC_PER;
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46 fprintf(stderr, "full buffer\n%s\n", data.buffer);
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47 // e2ap_asn1c_decode_pdu(pdu, data.buffer, data.len);
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49 auto rval = asn_decode(nullptr, syntax, &asn_DEF_E2AP_PDU, (void **) &pdu,
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50 data.buffer, data.len);
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53 int index = (int)pdu->present;
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54 fprintf(stderr, "length of data %d\n", rval.consumed);
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55 fprintf(stderr, "result %d\n", rval.code);
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56 fprintf(stderr, "index is %d\n", index);
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58 fprintf(stderr, "showing xer of data\n");
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60 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu);
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62 int procedureCode = e2ap_asn1c_get_procedureCode(pdu);
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63 index = (int)pdu->present;
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65 LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",
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66 index, procedureCode);
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68 switch(procedureCode)
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71 case ProcedureCode_id_E2setup:
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74 case E2AP_PDU_PR_initiatingMessage:
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75 e2ap_handle_E2SetupRequest(pdu, socket_fd);
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76 LOG_I("[E2AP] Received SETUP-REQUEST");
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79 case E2AP_PDU_PR_successfulOutcome:
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80 LOG_I("[E2AP] Received SETUP-RESPONSE-SUCCESS");
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83 case E2AP_PDU_PR_unsuccessfulOutcome:
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84 LOG_I("[E2AP] Received SETUP-RESPONSE-FAILURE");
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88 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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93 case ProcedureCode_id_Reset: //reset = 7
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96 case E2AP_PDU_PR_initiatingMessage:
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97 LOG_I("[E2AP] Received RESET-REQUEST");
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100 case E2AP_PDU_PR_successfulOutcome:
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103 case E2AP_PDU_PR_unsuccessfulOutcome:
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107 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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112 case ProcedureCode_id_RICsubscription: //RIC SUBSCRIPTION = 201
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115 case E2AP_PDU_PR_initiatingMessage: { //initiatingMessage
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116 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-REQUEST");
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117 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
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118 long func_id = encoding::get_function_id_from_subscription(pdu);
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119 fprintf(stderr, "Function Id of message is %d\n", func_id);
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120 SubscriptionCallback cb;
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122 bool func_exists = true;
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125 cb = e2sim->get_subscription_callback(func_id);
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126 } catch(const std::out_of_range& e) {
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127 func_exists = false;
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131 fprintf(stderr, "Calling callback function\n");
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134 fprintf(stderr, "Error: No RAN Function with this ID exists\n");
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136 // callback_kpm_subscription_request(pdu, socket_fd);
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141 case E2AP_PDU_PR_successfulOutcome:
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142 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-RESPONSE");
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145 case E2AP_PDU_PR_unsuccessfulOutcome:
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146 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-FAILURE");
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150 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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155 case ProcedureCode_id_RICindication: // 205
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158 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
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159 LOG_I("[E2AP] Received RIC-INDICATION-REQUEST");
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160 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
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162 case E2AP_PDU_PR_successfulOutcome:
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163 LOG_I("[E2AP] Received RIC-INDICATION-RESPONSE");
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166 case E2AP_PDU_PR_unsuccessfulOutcome:
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167 LOG_I("[E2AP] Received RIC-INDICATION-FAILURE");
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171 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
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172 (int)ProcedureCode_id_RICindication);
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177 case ProcedureCode_id_RICserviceQuery:
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180 case E2AP_PDU_PR_initiatingMessage:
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181 LOG_I("[E2AP] Received RIC-Service-Query")
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182 e2ap_handle_E2SeviceRequest(pdu, socket_fd, e2sim);
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186 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
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187 (int)ProcedureCode_id_RICserviceQuery);
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192 case ProcedureCode_id_E2nodeConfigurationUpdate:
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195 case E2AP_PDU_PR_successfulOutcome:
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196 LOG_I("[E2AP] Received E2nodeConfigurationUpdate")
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200 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
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201 (int)ProcedureCode_id_E2nodeConfigurationUpdate);
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206 case ProcedureCode_id_RICserviceUpdate:
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209 case E2AP_PDU_PR_successfulOutcome:
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210 LOG_I("[E2AP] Received RIC-SERVICE-UPDATE-SUCCESS")
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213 case E2AP_PDU_PR_unsuccessfulOutcome:
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214 LOG_I("[E2AP] Received RIC-SERVICE-UPDATE-FAILURE")
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218 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
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219 (int)ProcedureCode_id_RICserviceUpdate);
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226 LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);
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230 ASN_STRUCT_FREE(asn_DEF_E2AP_PDU, pdu);
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233 void e2ap_handle_E2SeviceRequest(E2AP_PDU_t* pdu, int &socket_fd, E2Sim *e2sim) {
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235 auto buffer_size = MAX_SCTP_BUFFER;
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236 unsigned char buffer[MAX_SCTP_BUFFER];
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237 E2AP_PDU_t* res_pdu = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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239 // prepare ran function defination
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240 std::vector<encoding::ran_func_info> all_funcs;
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242 //Loop through RAN function definitions that are registered
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244 for (std::pair<long, OCTET_STRING_t*> elem : e2sim->getRegistered_ran_functions()) {
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245 printf("looping through ran func\n");
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246 encoding::ran_func_info next_func;
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248 next_func.ranFunctionId = elem.first;
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249 next_func.ranFunctionDesc = elem.second;
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250 next_func.ranFunctionRev = (long)3;
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251 all_funcs.push_back(next_func);
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254 printf("about to call service update encode\n");
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256 encoding::generate_e2apv1_service_update(res_pdu, all_funcs);
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258 LOG_D("[E2AP] Created E2-SERVICE-UPDATE");
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260 e2ap_asn1c_print_pdu(res_pdu);
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262 sctp_buffer_t data;
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264 char error_buf[300] = {0, };
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267 asn_check_constraints(&asn_DEF_E2AP_PDU, res_pdu, error_buf, &errlen);
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268 printf("error length %d\n", errlen);
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269 printf("error buf %s\n", error_buf);
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271 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, res_pdu, buffer, buffer_size);
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273 data.len = er.encoded;
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274 fprintf(stderr, "er encoded is %d\n", er.encoded);
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276 memcpy(data.buffer, buffer, er.encoded);
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278 //send response data over sctp
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279 if(sctp_send_data(socket_fd, data) > 0) {
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280 LOG_I("[SCTP] Sent E2-SERVICE-UPDATE");
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282 LOG_E("[SCTP] Unable to send E2-SERVICE-UPDATE to peer");
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286 void e2ap_send_e2nodeConfigUpdate(int &socket_fd) {
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288 auto buffer_size = MAX_SCTP_BUFFER;
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289 unsigned char buffer[MAX_SCTP_BUFFER];
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290 E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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292 LOG_D("about to call e2nodeconfigUpdate encode\n");
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294 encoding::generate_e2apv2_config_update(pdu);
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296 LOG_D("[E2AP] Created E2nodeConfigUpdate");
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298 e2ap_asn1c_print_pdu(pdu);
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300 sctp_buffer_t data;
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302 char error_buf[300] = {0, };
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305 asn_check_constraints(&asn_DEF_E2AP_PDU, pdu, error_buf, &errlen);
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307 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu, buffer, buffer_size);
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309 data.len = er.encoded;
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310 fprintf(stderr, "er encoded is %d\n", er.encoded);
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312 memcpy(data.buffer, buffer, er.encoded);
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314 //send response data over sctp
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315 if(sctp_send_data(socket_fd, data) > 0) {
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316 LOG_I("[SCTP] Sent E2nodeConfigUpdate");
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318 LOG_E("[SCTP] Unable to send E2nodeConfigUpdate to peer");
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322 void e2ap_handle_E2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd) {
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325 E2AP_PDU_t* res_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
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326 encoding::generate_e2apv1_setup_response(res_pdu);
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329 LOG_D("[E2AP] Created E2-SETUP-RESPONSE");
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331 e2ap_asn1c_print_pdu(res_pdu);
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334 auto buffer_size = MAX_SCTP_BUFFER;
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335 unsigned char buffer[MAX_SCTP_BUFFER];
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337 sctp_buffer_t data;
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338 auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, res_pdu, buffer, buffer_size);
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340 data.len = er.encoded;
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341 fprintf(stderr, "er encoded is %d\n", er.encoded);
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343 //data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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344 memcpy(data.buffer, buffer, er.encoded);
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346 //send response data over sctp
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347 if(sctp_send_data(socket_fd, data) > 0) {
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348 LOG_I("[SCTP] Sent E2-SETUP-RESPONSE");
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350 LOG_E("[SCTP] Unable to send E2-SETUP-RESPONSE to peer");
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355 //Sending Subscription Request
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357 E2AP_PDU_t* pdu_sub = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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359 encoding::generate_e2apv1_subscription_request(pdu_sub);
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361 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_sub);
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363 auto buffer_size2 = MAX_SCTP_BUFFER;
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364 unsigned char buffer2[MAX_SCTP_BUFFER];
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366 sctp_buffer_t data2;
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368 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_sub, buffer2, buffer_size2);
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370 data2.len = er2.encoded;
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371 memcpy(data2.buffer, buffer2, er2.encoded);
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373 fprintf(stderr, "er encded is %d\n", er2.encoded);
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375 if(sctp_send_data(socket_fd, data2) > 0) {
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376 LOG_I("[SCTP] Sent E2-SUBSCRIPTION-REQUEST");
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378 LOG_E("[SCTP] Unable to send E2-SUBSCRIPTION-REQUEST to peer");
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385 void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
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388 //Send back Subscription Success Response
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390 E2AP_PDU_t* pdu_resp = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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392 generate_e2apv1_subscription_response(pdu_resp, pdu);
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394 fprintf(stderr, "Subscription Response\n");
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396 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_resp);
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398 auto buffer_size2 = MAX_SCTP_BUFFER;
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399 unsigned char buffer2[MAX_SCTP_BUFFER];
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401 sctp_buffer_t data2;
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403 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_resp, buffer2, buffer_size2);
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404 data2.len = er2.encoded;
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406 fprintf(stderr, "er encded is %d\n", er2.encoded);
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408 memcpy(data2.buffer, buffer2, er2.encoded);
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410 if(sctp_send_data(socket_fd, data2) > 0) {
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411 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
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413 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
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417 //Send back an Indication
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419 E2AP_PDU_t* pdu_ind = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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421 generate_e2apv1_indication_request(pdu_ind);
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423 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_ind);
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425 auto buffer_size = MAX_SCTP_BUFFER;
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426 unsigned char buffer[MAX_SCTP_BUFFER];
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428 sctp_buffer_t data;
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430 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_ind, buffer, buffer_size);
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431 data.len = er.encoded;
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433 fprintf(stderr, "er encded is %d\n", er.encoded);
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435 memcpy(data.buffer, buffer, er.encoded);
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437 if(sctp_send_data(socket_fd, data) > 0) {
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438 LOG_I("[SCTP] Sent RIC-INDICATION-REQUEST");
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440 LOG_E("[SCTP] Unable to send RIC-INDICATION-REQUEST to peer");
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