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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49 e2ap_handle_X2SetupResponse(pdu, socket_fd);
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52 case E2AP_PDU_PR_unsuccessfulOutcome:
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56 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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61 case ProcedureCode_id_endcX2Setup: //ENDCX2Setup = 36
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64 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
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65 LOG_I("[E2AP] Received ENDC-X2-SETUP-REQUEST");
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66 e2ap_handle_ENDCX2SetupRequest(pdu, socket_fd);
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69 case E2AP_PDU_PR_successfulOutcome: //successfulOutcome
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70 LOG_I("[E2AP] Received ENDC-X2-SETUP-RESPONSE");
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74 case E2AP_PDU_PR_unsuccessfulOutcome:
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75 LOG_I("[E2AP] Received ENDC-X2-SETUP-FAILURE");
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80 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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85 case ProcedureCode_id_reset: //reset = 7
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88 case E2AP_PDU_PR_initiatingMessage:
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89 LOG_I("[E2AP] Received RESET-REQUEST");
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92 case E2AP_PDU_PR_successfulOutcome:
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95 case E2AP_PDU_PR_unsuccessfulOutcome:
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99 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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104 case ProcedureCode_id_ricSubscription: //RIC SUBSCRIPTION = 201
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107 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
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108 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-REQUEST");
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109 //e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
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110 e2ap_handle_RICSubscriptionRequest_securityDemo(pdu, socket_fd);
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113 case E2AP_PDU_PR_successfulOutcome:
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114 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-RESPONSE");
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117 case E2AP_PDU_PR_unsuccessfulOutcome:
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118 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-FAILURE");
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122 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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127 case ProcedureCode_id_ricIndication: // 205
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130 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
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131 LOG_I("[E2AP] Received RIC-INDICATION");
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132 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
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136 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
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137 (int)ProcedureCode_id_ricIndication);
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142 case ProcedureCode_id_resourceStatusReportingInitiation: //9
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145 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
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146 LOG_I("[E2AP] Received RESOURCE-STATUS-REQUEST");
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147 e2ap_handle_ResourceStatusRequest(pdu, socket_fd);
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150 case E2AP_PDU_PR_successfulOutcome: //successfulOutcome
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151 LOG_I("[E2AP] Received RESOURCE-STATUS-RESPONSE");
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154 case E2AP_PDU_PR_unsuccessfulOutcome:
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155 LOG_I("[E2AP] Received RESOURCE-STATUS-FAILURE");
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159 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
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160 (int)ProcedureCode_id_resourceStatusReportingInitiation);
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165 case ProcedureCode_id_resourceStatusReporting: // 10
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168 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
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169 LOG_I("[E2AP] Received RESOURCE-STATUS-UPDATE");
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173 LOG_E("[E2AP] Unable to process message index=%d in E2AP-PDU %d", index,
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174 (int)ProcedureCode_id_resourceStatusReporting);
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180 LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);
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186 Simply send back X2SetupResponse
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187 Todo: add more handling options (failure, duplicated request, etc.)
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189 void e2ap_handle_X2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd)
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191 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_X2SetupResponse.xml");
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193 LOG_D("[E2AP] Created X2-SETUP-RESPONSE");
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195 e2ap_asn1c_print_pdu(res_pdu);
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198 sctp_buffer_t data;
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200 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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201 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
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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 X2-SETUP-RESPONSE");
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207 LOG_E("[SCTP] Unable to send X2-SETUP-RESPONSE to peer");
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211 void e2ap_handle_X2SetupResponse(E2AP_PDU_t* pdu, int &socket_fd)
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213 E2AP_PDU_t* req_pdu = e2ap_xml_to_pdu("E2AP_ResourceStatusRequest.xml");
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214 // E2AP_PDU_t* req_pdu = e2ap_xml_to_pdu("E2AP_ResourceStatusRequest_bad.xml");
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216 LOG_D("[E2AP] Created RESOURCE-STATUS-REQUEST");
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218 e2ap_asn1c_print_pdu(req_pdu);
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221 sctp_buffer_t data;
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223 data.len = e2ap_asn1c_encode_pdu(req_pdu, &buf);
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224 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
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226 //send response data over sctp
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227 if(sctp_send_data(socket_fd, data) > 0) {
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228 LOG_I("[SCTP] Sent RESOURCE-STATUS-REQUEST");
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230 LOG_E("[SCTP] Unable to send RESOURCE-STATUS-REQUEST to peer");
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236 Simply send back ENDCX2SetupResponse
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237 Todo: add more handling options (failure, duplicated request, etc.)
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239 void e2ap_handle_ENDCX2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd)
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241 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_ENDCX2SetupResponse.xml");
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243 LOG_D("[E2AP] Created ENDC-X2-SETUP-RESPONSE");
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245 e2ap_asn1c_print_pdu(res_pdu);
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248 sctp_buffer_t data;
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250 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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251 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
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253 //send response data over sctp
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254 if(sctp_send_data(socket_fd, data) > 0) {
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255 LOG_I("[SCTP] Sent ENDC-X2-SETUP-RESPONSE");
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257 LOG_E("[SCTP] Unable to send ENDC-X2-SETUP-RESPONSE to peer");
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262 Simply send back hard-coded RICSubscriptionResponse
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263 Todo: add more handling options (failure, duplicated request, etc.)
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265 void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
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267 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_RICsubscriptionResponse.xml");
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269 LOG_D("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");
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271 e2ap_asn1c_print_pdu(res_pdu);
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274 sctp_buffer_t data;
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276 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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277 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
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279 //send response data over sctp
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280 if(sctp_send_data(socket_fd, data) > 0) {
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281 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
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283 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
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287 void e2ap_handle_RICSubscriptionRequest_securityDemo(E2AP_PDU_t* pdu, int &socket_fd)
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289 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_RICsubscriptionResponse.xml");
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291 LOG_D("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");
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293 e2ap_asn1c_print_pdu(res_pdu);
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296 sctp_buffer_t data;
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298 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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299 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
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301 //send response data over sctp
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302 if(sctp_send_data(socket_fd, data) > 0) {
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303 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
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305 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
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308 //Start sending RIC Indication
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309 int count1 = 0, count2 = 0;
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311 E2AP_PDU_t* indication_type1 = e2ap_xml_to_pdu("E2AP_RICindication_type1.xml");
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312 E2AP_PDU_t* indication_type2 = e2ap_xml_to_pdu("E2AP_RICindication_type2.xml");
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314 uint8_t *buf1, *buf2;
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315 sctp_buffer_t data1, data2;
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316 data1.len = e2ap_asn1c_encode_pdu(indication_type1, &buf1);
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317 memcpy(data1.buffer, buf1, min(data1.len, MAX_SCTP_BUFFER));
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319 data2.len = e2ap_asn1c_encode_pdu(indication_type2, &buf2);
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320 memcpy(data2.buffer, buf2, min(data2.len, MAX_SCTP_BUFFER));
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325 if(sctp_send_data(socket_fd, data1) > 0) {
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327 LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 1, count1 = %d", count1);
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329 LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");
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334 if(sctp_send_data(socket_fd, data2) > 0) {
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336 LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 2, count2 = %d", count2);
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338 LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");
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344 void e2ap_handle_ResourceStatusRequest(E2AP_PDU_t* pdu, int &socket_fd)
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346 //send back ResourceStatusResponse, followed by resource status update
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347 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_ResourceStatusResponse.xml");
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349 LOG_D("[E2AP] Created RESOURCE-STATUS-RESPONSE");
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351 e2ap_asn1c_print_pdu(res_pdu);
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354 sctp_buffer_t data;
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356 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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357 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
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359 //send response data over sctp
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360 if(sctp_send_data(socket_fd, data) > 0) {
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361 LOG_I("[SCTP] Sent RESOURCE-STATUS-RESPONSE");
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363 LOG_E("[SCTP] Unable to send RESOURCE-STATUS-RESPONSE to peer");
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367 //send ResourceStatusUpdate periodically
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368 E2AP_PDU_t* update_pdu = e2ap_xml_to_pdu("E2AP_ResourceStatusUpdate.xml");
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370 uint8_t *update_buf;
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371 sctp_buffer_t update_data;
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373 update_data.len = e2ap_asn1c_encode_pdu(update_pdu, &update_buf);
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374 memcpy(update_data.buffer, update_buf, min(update_data.len, MAX_SCTP_BUFFER));
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377 // e2ap_asn1c_print_pdu(update_pdu);
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379 if(sctp_send_data(socket_fd, update_data) > 0) {
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380 LOG_I("[SCTP] Sent RESOURCE-STATUS-UPDATE");
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382 LOG_E("[SCTP] Unable to send RESOURCE-STATUS-UPDATE to peer");
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