1 /*****************************************************************************
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3 # Copyright 2019 AT&T Intellectual Property *
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4 # Copyright 2019 Nokia *
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6 # Licensed under the Apache License, Version 2.0 (the "License"); *
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7 # you may not use this file except in compliance with the License. *
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8 # You may obtain a copy of the License at *
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10 # http://www.apache.org/licenses/LICENSE-2.0 *
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12 # Unless required by applicable law or agreed to in writing, software *
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13 # distributed under the License is distributed on an "AS IS" BASIS, *
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14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
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15 # See the License for the specific language governing permissions and *
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16 # limitations under the License. *
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18 ******************************************************************************/
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19 #include "e2ap_message_handler.hpp"
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22 void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data)
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24 //decode the data into E2AP-PDU
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25 E2AP_PDU_t* pdu = new E2AP_PDU_t();
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27 e2ap_asn1c_decode_pdu(pdu, data.buffer, data.len);
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29 e2ap_asn1c_print_pdu(pdu);
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31 int procedureCode = e2ap_asn1c_get_procedureCode(pdu);
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32 int index = (int)pdu->present;
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34 LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",
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35 index, procedureCode);
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37 switch(procedureCode)
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39 case ProcedureCode_id_x2Setup: //X2Setup = 6
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42 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
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43 LOG_I("[E2AP] Received X2-SETUP-REQUEST");
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44 e2ap_handle_X2SetupRequest(pdu, socket_fd);
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47 case E2AP_PDU_PR_successfulOutcome: //successfulOutcome
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48 LOG_I("[E2AP] Received X2-SETUP-RESPONSE");
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51 case E2AP_PDU_PR_unsuccessfulOutcome:
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55 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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60 case ProcedureCode_id_endcX2Setup: //ENDCX2Setup = 36
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63 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
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64 LOG_I("[E2AP] Received ENDC-X2-SETUP-REQUEST");
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65 e2ap_handle_ENDCX2SetupRequest(pdu, socket_fd);
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68 case E2AP_PDU_PR_successfulOutcome: //successfulOutcome
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69 LOG_I("[E2AP] Received ENDC-X2-SETUP-RESPONSE");
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73 case E2AP_PDU_PR_unsuccessfulOutcome:
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74 LOG_I("[E2AP] Received ENDC-X2-SETUP-FAILURE");
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79 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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84 case ProcedureCode_id_reset: //reset = 7
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87 case E2AP_PDU_PR_initiatingMessage:
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88 LOG_I("[E2AP] Received RESET-REQUEST");
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91 case E2AP_PDU_PR_successfulOutcome:
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94 case E2AP_PDU_PR_unsuccessfulOutcome:
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98 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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103 case ProcedureCode_id_ricSubscription: //RIC SUBSCRIPTION = 201
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106 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
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107 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-REQUEST");
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108 //e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
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109 e2ap_handle_RICSubscriptionRequest_securityDemo(pdu, socket_fd);
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112 case E2AP_PDU_PR_successfulOutcome:
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113 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-RESPONSE");
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116 case E2AP_PDU_PR_unsuccessfulOutcome:
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117 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-FAILURE");
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121 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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126 case ProcedureCode_id_ricIndication: // 205
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129 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
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130 LOG_I("[E2AP] Received RIC-INDICATION");
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131 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
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135 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
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136 (int)ProcedureCode_id_ricIndication);
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142 LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);
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148 Simply send back X2SetupResponse
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149 Todo: add more handling options (failure, duplicated request, etc.)
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151 void e2ap_handle_X2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd)
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153 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_X2SetupResponse.xml");
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155 LOG_D("[E2AP] Created X2-SETUP-RESPONSE");
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157 e2ap_asn1c_print_pdu(res_pdu);
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160 sctp_buffer_t data;
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162 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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163 memcpy(data.buffer, buf, data.len);
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165 //send response data over sctp
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166 if(sctp_send_data(socket_fd, data) > 0) {
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167 LOG_I("[SCTP] Sent X2-SETUP-RESPONSE");
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169 LOG_E("[SCTP] Unable to send X2-SETUP-RESPONSE to peer");
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174 Simply send back ENDCX2SetupResponse
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175 Todo: add more handling options (failure, duplicated request, etc.)
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177 void e2ap_handle_ENDCX2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd)
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179 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_ENDCX2SetupResponse.xml");
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181 LOG_D("[E2AP] Created ENDC-X2-SETUP-RESPONSE");
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183 e2ap_asn1c_print_pdu(res_pdu);
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186 sctp_buffer_t data;
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188 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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189 memcpy(data.buffer, buf, data.len);
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191 //send response data over sctp
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192 if(sctp_send_data(socket_fd, data) > 0) {
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193 LOG_I("[SCTP] Sent ENDC-X2-SETUP-RESPONSE");
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195 LOG_E("[SCTP] Unable to send ENDC-X2-SETUP-RESPONSE to peer");
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200 Simply send back hard-coded RICSubscriptionResponse
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201 Todo: add more handling options (failure, duplicated request, etc.)
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203 void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
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205 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_RICsubscriptionResponse.xml");
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207 LOG_D("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");
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209 e2ap_asn1c_print_pdu(res_pdu);
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212 sctp_buffer_t data;
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214 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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215 memcpy(data.buffer, buf, data.len);
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217 //send response data over sctp
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218 if(sctp_send_data(socket_fd, data) > 0) {
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219 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
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221 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
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225 void e2ap_handle_RICSubscriptionRequest_securityDemo(E2AP_PDU_t* pdu, int &socket_fd)
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227 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_RICsubscriptionResponse.xml");
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229 LOG_D("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");
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231 e2ap_asn1c_print_pdu(res_pdu);
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234 sctp_buffer_t data;
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236 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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237 memcpy(data.buffer, buf, data.len);
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239 //send response data over sctp
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240 if(sctp_send_data(socket_fd, data) > 0) {
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241 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
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243 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
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246 //Start sending RIC Indication
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247 int count1 = 0, count2 = 0;
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249 E2AP_PDU_t* indication_type1 = e2ap_xml_to_pdu("E2AP_RICindication_type1.xml");
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250 E2AP_PDU_t* indication_type2 = e2ap_xml_to_pdu("E2AP_RICindication_type2.xml");
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252 uint8_t *buf1, *buf2;
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253 sctp_buffer_t data1, data2;
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254 data1.len = e2ap_asn1c_encode_pdu(indication_type1, &buf1);
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255 memcpy(data1.buffer, buf1, data1.len);
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257 data2.len = e2ap_asn1c_encode_pdu(indication_type2, &buf2);
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258 memcpy(data2.buffer, buf2, data2.len);
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263 if(sctp_send_data(socket_fd, data1) > 0) {
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265 LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 1, count1 = %d", count1);
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267 LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");
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272 if(sctp_send_data(socket_fd, data2) > 0) {
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274 LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 2, count2 = %d", count2);
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276 LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");
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282 // void e2ap_handle_RICSubscriptionRequest_old(e2ap_pdu_t* pdu, int &socket_fd)
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284 // RICsubscription_params_t params;
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285 // e2ap_parse_RICsubscriptionRequest(pdu, params);
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287 // /* Example handling logic
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288 // - Accept if request id is even-numbered -> send back response
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289 // in this case, accept every other actions
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291 // - Reject if request id is odd-numbered -> send back failure
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294 // e2ap_pdu_t* res_pdu = new_e2ap_pdu();
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295 // bool is_failure = false;
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297 // if(params.request_id % 2 == 0)
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299 // for(size_t i = 0; i < params.actionList.size(); i++)
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302 // params.actionList[i].isAdmitted = true;
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304 // params.actionList[i].isAdmitted = false;
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305 // params.actionList[i].notAdmitted_cause = RICcause_radioNetwork;
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306 // params.actionList[i].notAdmitted_subCause = 5;
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310 // e2ap_create_RICsubscriptionResponse(res_pdu, params);
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311 // LOG_I("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");
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315 // is_failure = true;
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317 // for(size_t i = 0; i < params.actionList.size(); i++)
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319 // params.actionList[i].isAdmitted = false;
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320 // params.actionList[i].notAdmitted_cause = RICcause_radioNetwork;
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321 // params.actionList[i].notAdmitted_subCause = 5;
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324 // e2ap_create_RICsubscriptionFailure(res_pdu, params);
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325 // LOG_I("[E2AP] Created RIC-SUBSCRIPTION-FAILURE");
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328 // e2ap_print_pdu(res_pdu);
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330 // //Encode into buffer
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331 // sctp_buffer_t data;
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332 // e2ap_encode_pdu(res_pdu, data.buffer, sizeof(data.buffer), data.len);
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334 // //send response data over sctp
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335 // if(sctp_send_data(socket_fd, data) > 0)
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337 // if(is_failure) {
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338 // LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-FAILURE");
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341 // LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
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346 // if(is_failure) {
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347 // LOG_I("[SCTP] Unable to send RIC-SUBSCRIPTION-FAILURE");
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350 // LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE");
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