3 /*****************************************************************************
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5 # Copyright 2019 AT&T Intellectual Property *
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6 # Copyright 2019 Nokia *
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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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25 #include "encode_e2apv1.hpp"
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29 void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data, bool xmlenc)
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31 fprintf(stderr, "in e2ap_handle_sctp_data()\n");
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32 //decode the data into E2AP-PDU
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33 E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
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34 ASN_STRUCT_RESET(asn_DEF_E2AP_PDU, pdu);
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36 fprintf(stderr, "decoding...\n");
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38 asn_transfer_syntax syntax;
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41 syntax = ATS_ALIGNED_BASIC_PER;
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43 syntax = ATS_BASIC_XER;
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45 // e2ap_asn1c_decode_pdu(pdu, data.buffer, data.len);
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47 auto rval = asn_decode(nullptr, syntax, &asn_DEF_E2AP_PDU, (void **) &pdu,
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48 data.buffer, data.len);
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51 int index = (int)pdu->present;
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52 fprintf(stderr, "length of data %d\n", rval.consumed);
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53 fprintf(stderr, "result %d\n", rval.code);
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54 fprintf(stderr, "index is %d\n", index);
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56 fprintf(stderr, "showing xer of data\n");
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58 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu);
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60 int procedureCode = e2ap_asn1c_get_procedureCode(pdu);
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61 index = (int)pdu->present;
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63 LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",
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64 index, procedureCode);
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66 switch(procedureCode)
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69 case ProcedureCode_id_E2setup:
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72 case E2AP_PDU_PR_initiatingMessage:
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73 e2ap_handle_E2SetupRequest(pdu, socket_fd);
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74 LOG_I("[E2AP] Received SETUP-REQUEST");
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77 case E2AP_PDU_PR_successfulOutcome:
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78 LOG_I("[E2AP] Received SETUP-RESPONSE-SUCCESS");
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81 case E2AP_PDU_PR_unsuccessfulOutcome:
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82 LOG_I("[E2AP] Received SETUP-RESPONSE-FAILURE");
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86 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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91 case ProcedureCode_id_Reset: //reset = 7
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94 case E2AP_PDU_PR_initiatingMessage:
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95 LOG_I("[E2AP] Received RESET-REQUEST");
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98 case E2AP_PDU_PR_successfulOutcome:
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101 case E2AP_PDU_PR_unsuccessfulOutcome:
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105 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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110 case ProcedureCode_id_RICsubscription: //RIC SUBSCRIPTION = 201
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113 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
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114 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-REQUEST");
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115 e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
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116 // e2ap_handle_RICSubscriptionRequest_securityDemo(pdu, socket_fd);
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119 case E2AP_PDU_PR_successfulOutcome:
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120 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-RESPONSE");
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123 case E2AP_PDU_PR_unsuccessfulOutcome:
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124 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-FAILURE");
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128 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
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133 case ProcedureCode_id_RICindication: // 205
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136 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
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137 LOG_I("[E2AP] Received RIC-INDICATION-REQUEST");
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138 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
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140 case E2AP_PDU_PR_successfulOutcome:
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141 LOG_I("[E2AP] Received RIC-INDICATION-RESPONSE");
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144 case E2AP_PDU_PR_unsuccessfulOutcome:
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145 LOG_I("[E2AP] Received RIC-INDICATION-FAILURE");
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149 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
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150 (int)ProcedureCode_id_RICindication);
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157 LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);
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163 void e2ap_handle_E2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd) {
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166 E2AP_PDU_t* res_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
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167 generate_e2apv1_setup_response(res_pdu);
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170 LOG_D("[E2AP] Created E2-SETUP-RESPONSE");
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172 e2ap_asn1c_print_pdu(res_pdu);
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175 auto buffer_size = MAX_SCTP_BUFFER;
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176 unsigned char buffer[MAX_SCTP_BUFFER];
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178 sctp_buffer_t data;
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179 auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, res_pdu, buffer, buffer_size);
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181 data.len = er.encoded;
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182 fprintf(stderr, "er encoded is %d\n", er.encoded);
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184 //data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
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185 memcpy(data.buffer, buffer, er.encoded);
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187 //send response data over sctp
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188 if(sctp_send_data(socket_fd, data) > 0) {
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189 LOG_I("[SCTP] Sent E2-SETUP-RESPONSE");
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191 LOG_E("[SCTP] Unable to send E2-SETUP-RESPONSE to peer");
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196 //Sending Subscription Request
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198 E2AP_PDU_t* pdu_sub = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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200 generate_e2apv1_subscription_request(pdu_sub);
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202 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_sub);
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204 auto buffer_size2 = MAX_SCTP_BUFFER;
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205 unsigned char buffer2[MAX_SCTP_BUFFER];
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207 sctp_buffer_t data2;
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209 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_sub, buffer2, buffer_size2);
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211 data2.len = er2.encoded;
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212 memcpy(data2.buffer, buffer2, er2.encoded);
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214 fprintf(stderr, "er encded is %d\n", er2.encoded);
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216 if(sctp_send_data(socket_fd, data2) > 0) {
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217 LOG_I("[SCTP] Sent E2-SUBSCRIPTION-REQUEST");
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219 LOG_E("[SCTP] Unable to send E2-SUBSCRIPTION-REQUEST to peer");
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226 void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
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229 //Send back Subscription Success Response
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231 E2AP_PDU_t* pdu_resp = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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233 generate_e2apv1_subscription_response(pdu_resp, pdu);
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235 fprintf(stderr, "Subscription Response\n");
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237 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_resp);
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239 auto buffer_size2 = MAX_SCTP_BUFFER;
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240 unsigned char buffer2[MAX_SCTP_BUFFER];
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242 sctp_buffer_t data2;
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244 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_resp, buffer2, buffer_size2);
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245 data2.len = er2.encoded;
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247 fprintf(stderr, "er encded is %d\n", er2.encoded);
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249 memcpy(data2.buffer, buffer2, er2.encoded);
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251 if(sctp_send_data(socket_fd, data2) > 0) {
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252 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
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254 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
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258 //Send back an Indication
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260 E2AP_PDU_t* pdu_ind = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
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262 generate_e2apv1_indication_request(pdu_ind);
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264 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_ind);
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266 auto buffer_size = MAX_SCTP_BUFFER;
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267 unsigned char buffer[MAX_SCTP_BUFFER];
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269 sctp_buffer_t data;
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271 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_ind, buffer, buffer_size);
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272 data.len = er.encoded;
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274 fprintf(stderr, "er encded is %d\n", er.encoded);
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276 memcpy(data.buffer, buffer, er.encoded);
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278 if(sctp_send_data(socket_fd, data) > 0) {
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279 LOG_I("[SCTP] Sent RIC-INDICATION-REQUEST");
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281 LOG_E("[SCTP] Unable to send RIC-INDICATION-REQUEST to peer");
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