1 /*****************************************************************************
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3 # Copyright 2019 AT&T Intellectual Property *
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4 # Copyright 2019 Nokia *
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5 # Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved. *
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7 # Licensed under the Apache License, Version 2.0 (the "License"); *
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8 # you may not use this file except in compliance with the License. *
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9 # You may obtain a copy of the License at *
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11 # http://www.apache.org/licenses/LICENSE-2.0 *
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13 # Unless required by applicable law or agreed to in writing, software *
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14 # distributed under the License is distributed on an "AS IS" BASIS, *
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15 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
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16 # See the License for the specific language governing permissions and *
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17 # limitations under the License. *
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19 ******************************************************************************/
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20 #include "e2ap_message_handler.hpp"
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22 //#include <iostream>
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25 #include "encode_e2apv1.hpp"
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30 void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data, bool xmlenc)
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32 fprintf(stderr, "in e2ap_handle_sctp_data()\n");
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33 //decode the data into E2AP-PDU
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34 E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
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35 ASN_STRUCT_RESET(asn_DEF_E2AP_PDU, pdu);
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37 fprintf(stderr, "decoding...\n");
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39 asn_transfer_syntax syntax;
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42 syntax = ATS_ALIGNED_BASIC_PER;
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45 fprintf(stderr, "full buffer\n%s\n", data.buffer);
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46 // e2ap_asn1c_decode_pdu(pdu, data.buffer, data.len);
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48 auto rval = asn_decode(nullptr, syntax, &asn_DEF_E2AP_PDU, (void **) &pdu,
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49 data.buffer, data.len);
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52 int index = (int)pdu->present;
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53 fprintf(stderr, "length of data %d\n", rval.consumed);
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54 fprintf(stderr, "result %d\n", rval.code);
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55 fprintf(stderr, "index is %d\n", index);
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57 fprintf(stderr, "showing xer of data\n");
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59 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu);
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61 int procedureCode = e2ap_asn1c_get_procedureCode(pdu);
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62 index = (int)pdu->present;
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64 LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",
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65 index, procedureCode);
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67 switch(procedureCode)
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70 case ProcedureCode_id_E2setup:
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73 case E2AP_PDU_PR_initiatingMessage:
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74 e2ap_handle_E2SetupRequest(pdu, socket_fd);
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75 LOG_I("[E2AP] Received SETUP-REQUEST");
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78 case E2AP_PDU_PR_successfulOutcome:
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79 LOG_I("[E2AP] Received SETUP-RESPONSE-SUCCESS");
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82 case E2AP_PDU_PR_unsuccessfulOutcome:
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83 LOG_I("[E2AP] Received SETUP-RESPONSE-FAILURE");
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87 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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92 case ProcedureCode_id_Reset: //reset = 7
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95 case E2AP_PDU_PR_initiatingMessage:
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96 LOG_I("[E2AP] Received RESET-REQUEST");
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99 case E2AP_PDU_PR_successfulOutcome:
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102 case E2AP_PDU_PR_unsuccessfulOutcome:
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106 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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111 case ProcedureCode_id_RICindication: // 205
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114 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
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115 LOG_I("[E2AP] Received RIC-INDICATION-REQUEST");
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116 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
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118 case E2AP_PDU_PR_successfulOutcome:
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119 LOG_I("[E2AP] Received RIC-INDICATION-RESPONSE");
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122 case E2AP_PDU_PR_unsuccessfulOutcome:
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123 LOG_I("[E2AP] Received RIC-INDICATION-FAILURE");
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127 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
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128 (int)ProcedureCode_id_RICindication);
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133 case ProcedureCode_id_RICserviceQuery:
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136 case E2AP_PDU_PR_initiatingMessage:
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137 LOG_I("[E2AP] Received RIC-Service-Query")
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138 e2ap_handle_E2SeviceUpdate(pdu, socket_fd);
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142 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
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143 (int)ProcedureCode_id_RICserviceQuery);
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148 case ProcedureCode_id_RICserviceUpdate:
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151 case E2AP_PDU_PR_successfulOutcome:
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152 LOG_I("[E2AP] Received RIC-SERVICE-UPDATE-SUCCESS")
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155 case E2AP_PDU_PR_unsuccessfulOutcome:
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156 LOG_I("[E2AP] Received RIC-SERVICE-UPDATE-FAILURE")
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160 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
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161 (int)ProcedureCode_id_RICserviceUpdate);
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168 LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);
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174 void e2ap_handle_E2SeviceUpdate(E2AP_PDU_t* pdu, int &socket_fd) {
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176 auto buffer_size = MAX_SCTP_BUFFER;
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177 unsigned char buffer[MAX_SCTP_BUFFER];
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178 E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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179 generate_e2apv1_service_update(pdu);
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181 printf("After generating e2setup req\n");
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183 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu);
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185 printf("After XER Encoding\n");
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187 sctp_buffer_t data;
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189 char *error_buf = (char*)calloc(300, sizeof(char));
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192 asn_check_constraints(&asn_DEF_E2AP_PDU, pdu, error_buf, &errlen);
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193 printf("error length %d\n", errlen);
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194 printf("error buf %s\n", error_buf);
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196 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu, buffer, buffer_size);
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197 //auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, pdu_setup, buffer, buffer_size);
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198 data.len = er.encoded;
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199 fprintf(stderr, "er encoded is %d\n", er.encoded);
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201 memcpy(data.buffer, buffer, er.encoded);
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203 //send response data over sctp
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204 if(sctp_send_data(socket_fd, data) > 0) {
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205 LOG_I("[SCTP] Sent E2-SERVICE-UPDATE");
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207 LOG_E("[SCTP] Unable to send E2-SERVICE-UPDATE to peer");
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211 void e2ap_handle_E2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd) {
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214 E2AP_PDU_t* res_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
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215 generate_e2apv1_setup_response(res_pdu);
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218 LOG_D("[E2AP] Created E2-SETUP-RESPONSE");
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220 e2ap_asn1c_print_pdu(res_pdu);
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223 auto buffer_size = MAX_SCTP_BUFFER;
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224 unsigned char buffer[MAX_SCTP_BUFFER];
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226 sctp_buffer_t data;
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227 auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, res_pdu, buffer, buffer_size);
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229 data.len = er.encoded;
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230 fprintf(stderr, "er encoded is %d\n", er.encoded);
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232 //data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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233 memcpy(data.buffer, buffer, er.encoded);
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235 //send response data over sctp
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236 if(sctp_send_data(socket_fd, data) > 0) {
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237 LOG_I("[SCTP] Sent E2-SETUP-RESPONSE");
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239 LOG_E("[SCTP] Unable to send E2-SETUP-RESPONSE to peer");
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244 //Sending Subscription Request
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246 E2AP_PDU_t* pdu_sub = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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248 generate_e2apv1_subscription_request(pdu_sub);
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250 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_sub);
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252 auto buffer_size2 = MAX_SCTP_BUFFER;
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253 unsigned char buffer2[MAX_SCTP_BUFFER];
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255 sctp_buffer_t data2;
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257 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_sub, buffer2, buffer_size2);
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259 data2.len = er2.encoded;
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260 memcpy(data2.buffer, buffer2, er2.encoded);
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262 fprintf(stderr, "er encded is %d\n", er2.encoded);
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264 if(sctp_send_data(socket_fd, data2) > 0) {
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265 LOG_I("[SCTP] Sent E2-SUBSCRIPTION-REQUEST");
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267 LOG_E("[SCTP] Unable to send E2-SUBSCRIPTION-REQUEST to peer");
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274 void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
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277 //Send back Subscription Success Response
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279 E2AP_PDU_t* pdu_resp = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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281 generate_e2apv1_subscription_response(pdu_resp, pdu);
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283 fprintf(stderr, "Subscription Response\n");
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285 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_resp);
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287 auto buffer_size2 = MAX_SCTP_BUFFER;
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288 unsigned char buffer2[MAX_SCTP_BUFFER];
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290 sctp_buffer_t data2;
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292 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_resp, buffer2, buffer_size2);
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293 data2.len = er2.encoded;
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295 fprintf(stderr, "er encded is %d\n", er2.encoded);
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297 memcpy(data2.buffer, buffer2, er2.encoded);
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299 if(sctp_send_data(socket_fd, data2) > 0) {
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300 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
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302 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
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306 //Send back an Indication
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308 E2AP_PDU_t* pdu_ind = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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310 generate_e2apv1_indication_request(pdu_ind);
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312 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_ind);
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314 auto buffer_size = MAX_SCTP_BUFFER;
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315 unsigned char buffer[MAX_SCTP_BUFFER];
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317 sctp_buffer_t data;
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319 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_ind, buffer, buffer_size);
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320 data.len = er.encoded;
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322 fprintf(stderr, "er encded is %d\n", er.encoded);
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324 memcpy(data.buffer, buffer, er.encoded);
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326 if(sctp_send_data(socket_fd, data) > 0) {
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327 LOG_I("[SCTP] Sent RIC-INDICATION-REQUEST");
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329 LOG_E("[SCTP] Unable to send RIC-INDICATION-REQUEST to peer");
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