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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21 #include "encode_e2apv1.hpp"
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23 void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data, bool xmlenc)
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25 fprintf(stderr, "in e2ap_handle_sctp_data()\n");
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26 //decode the data into E2AP-PDU
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27 E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
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28 ASN_STRUCT_RESET(asn_DEF_E2AP_PDU, pdu);
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30 fprintf(stderr, "decoding...\n");
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32 asn_transfer_syntax syntax;
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35 syntax = ATS_ALIGNED_BASIC_PER;
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37 syntax = ATS_BASIC_XER;
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39 // e2ap_asn1c_decode_pdu(pdu, data.buffer, data.len);
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41 auto rval = asn_decode(nullptr, syntax, &asn_DEF_E2AP_PDU, (void **) &pdu,
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42 data.buffer, data.len);
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45 int index = (int)pdu->present;
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46 fprintf(stderr, "length of data %d\n", rval.consumed);
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47 fprintf(stderr, "result %d\n", rval.code);
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48 fprintf(stderr, "index is %d\n", index);
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50 fprintf(stderr, "showing xer of data\n");
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52 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu);
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54 int procedureCode = e2ap_asn1c_get_procedureCode(pdu);
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55 index = (int)pdu->present;
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57 LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",
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58 index, procedureCode);
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60 switch(procedureCode)
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63 case ProcedureCode_id_E2setup:
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66 case E2AP_PDU_PR_initiatingMessage:
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67 e2ap_handle_E2SetupRequest(pdu, socket_fd);
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68 LOG_I("[E2AP] Received SETUP-REQUEST");
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71 case E2AP_PDU_PR_successfulOutcome:
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72 LOG_I("[E2AP] Received SETUP-RESPONSE-SUCCESS");
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75 case E2AP_PDU_PR_unsuccessfulOutcome:
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76 LOG_I("[E2AP] Received SETUP-RESPONSE-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-REQUEST");
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132 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
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134 case E2AP_PDU_PR_successfulOutcome:
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135 LOG_I("[E2AP] Received RIC-INDICATION-RESPONSE");
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138 case E2AP_PDU_PR_unsuccessfulOutcome:
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139 LOG_I("[E2AP] Received RIC-INDICATION-FAILURE");
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143 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
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144 (int)ProcedureCode_id_RICindication);
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151 LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);
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153 fprintf(stderr, "sending subscription request\n");
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154 E2AP_PDU_t* sub_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
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155 generate_e2apv1_subscription_request(sub_pdu);
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157 auto buffer_size = MAX_SCTP_BUFFER;
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158 unsigned char buffer[MAX_SCTP_BUFFER];
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160 sctp_buffer_t data;
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162 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, sub_pdu, buffer, buffer_size);
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164 data.len = er.encoded;
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166 fprintf(stderr, "er encded is %d\n", er.encoded);
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168 memcpy(data.buffer, buffer, er.encoded);
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170 if(sctp_send_data(socket_fd, data) > 0) {
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171 LOG_I("[SCTP] Sent E2-SUBSCRIPTION-REQUEST");
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173 LOG_E("[SCTP] Unable to send E2-SUBSCRIPTION-REQUEST to peer");
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180 void e2ap_handle_E2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd) {
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183 E2AP_PDU_t* res_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
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184 generate_e2apv1_setup_response(res_pdu);
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187 LOG_D("[E2AP] Created E2-SETUP-RESPONSE");
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189 e2ap_asn1c_print_pdu(res_pdu);
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192 auto buffer_size = MAX_SCTP_BUFFER;
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193 unsigned char buffer[MAX_SCTP_BUFFER];
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195 sctp_buffer_t data;
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196 auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, res_pdu, 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 //data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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202 memcpy(data.buffer, buffer, er.encoded);
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204 //send response data over sctp
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205 if(sctp_send_data(socket_fd, data) > 0) {
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206 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
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208 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
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213 //Sending Subscription Request
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215 E2AP_PDU_t* pdu_sub = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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217 // generate_e2apv1_subscription_request(pdu_setup);
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218 generate_e2apv1_subscription_request(pdu_sub);
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220 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_sub);
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222 auto buffer_size2 = MAX_SCTP_BUFFER;
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223 unsigned char buffer2[MAX_SCTP_BUFFER];
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225 sctp_buffer_t data2;
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227 // auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_sub, buffer, buffer_size);
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228 auto er2 = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, pdu_sub, buffer, buffer_size);
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230 data2.len = er2.encoded;
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231 memcpy(data2.buffer, buffer2, er2.encoded);
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233 fprintf(stderr, "er encded is %d\n", er2.encoded);
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236 fprintf(stderr, "now that we've encoded....let's decode!!\n");
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237 E2AP_PDU_t* pdu_sub2 = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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239 // auto er3 = asn_decode(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, (void **) &pdu_sub2,
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240 auto er3 = asn_decode(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, (void **) &pdu_sub2,
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241 data2.buffer, data2.len);
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243 int index = (int)pdu_sub2->present;
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244 fprintf(stderr, "length of data %d\n", er3.consumed);
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245 fprintf(stderr, "result %d\n", er3.code);
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246 fprintf(stderr, "index is %d\n", index);
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248 fprintf(stderr, "showing xer of data\n");
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250 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_sub2);
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251 int procedureCode = e2ap_asn1c_get_procedureCode(pdu_sub2);
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253 LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",
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254 index, procedureCode);
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263 if(sctp_send_data(socket_fd, data2) > 0) {
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264 LOG_I("[SCTP] Sent E2-SUBSCRIPTION-REQUEST");
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266 LOG_E("[SCTP] Unable to send E2-SUBSCRIPTION-REQUEST to peer");
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273 void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
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275 //Send back an Indication
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278 E2AP_PDU_t* pdu_setup = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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280 generate_e2apv1_indication_request(pdu_setup);
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282 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_setup);
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284 auto buffer_size = MAX_SCTP_BUFFER;
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285 unsigned char buffer[MAX_SCTP_BUFFER];
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287 sctp_buffer_t data;
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289 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_setup, buffer, buffer_size);
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290 data.len = er.encoded;
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292 fprintf(stderr, "er encded is %d\n", er.encoded);
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294 memcpy(data.buffer, buffer, er.encoded);
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296 if(sctp_send_data(socket_fd, data) > 0) {
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297 LOG_I("[SCTP] Sent E2-SETUP-REQUEST");
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299 LOG_E("[SCTP] Unable to send E2-SETUP-REQUEST to peer");
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304 void e2ap_handle_RICSubscriptionRequest_securityDemo(E2AP_PDU_t* pdu, int &socket_fd)
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306 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_RICsubscriptionResponse.xml");
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308 LOG_D("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");
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310 e2ap_asn1c_print_pdu(res_pdu);
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313 sctp_buffer_t data;
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315 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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316 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
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318 //send response data over sctp
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319 if(sctp_send_data(socket_fd, data) > 0) {
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320 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
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322 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
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325 //Start sending RIC Indication
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326 int count1 = 0, count2 = 0;
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328 E2AP_PDU_t* indication_type1 = e2ap_xml_to_pdu("E2AP_RICindication_type1.xml");
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329 E2AP_PDU_t* indication_type2 = e2ap_xml_to_pdu("E2AP_RICindication_type2.xml");
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331 uint8_t *buf1, *buf2;
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332 sctp_buffer_t data1, data2;
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333 data1.len = e2ap_asn1c_encode_pdu(indication_type1, &buf1);
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334 memcpy(data1.buffer, buf1, min(data1.len, MAX_SCTP_BUFFER));
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336 data2.len = e2ap_asn1c_encode_pdu(indication_type2, &buf2);
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337 memcpy(data2.buffer, buf2, min(data2.len, MAX_SCTP_BUFFER));
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342 if(sctp_send_data(socket_fd, data1) > 0) {
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344 LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 1, count1 = %d", count1);
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346 LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");
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351 if(sctp_send_data(socket_fd, data2) > 0) {
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353 LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 2, count2 = %d", count2);
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355 LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");
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