1 /*****************************************************************************
3 # Copyright 2019 AT&T Intellectual Property *
4 # Copyright 2019 Nokia *
6 # Licensed under the Apache License, Version 2.0 (the "License"); *
7 # you may not use this file except in compliance with the License. *
8 # You may obtain a copy of the License at *
10 # http://www.apache.org/licenses/LICENSE-2.0 *
12 # Unless required by applicable law or agreed to in writing, software *
13 # distributed under the License is distributed on an "AS IS" BASIS, *
14 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
15 # See the License for the specific language governing permissions and *
16 # limitations under the License. *
18 ******************************************************************************/
19 #include "e2ap_message_handler.hpp"
22 void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data)
24 //decode the data into E2AP-PDU
25 E2AP_PDU_t* pdu = new E2AP_PDU_t();
27 e2ap_asn1c_decode_pdu(pdu, data.buffer, data.len);
29 e2ap_asn1c_print_pdu(pdu);
31 int procedureCode = e2ap_asn1c_get_procedureCode(pdu);
32 int index = (int)pdu->present;
34 LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",
35 index, procedureCode);
39 case ProcedureCode_id_x2Setup: //X2Setup = 6
42 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
43 LOG_I("[E2AP] Received X2-SETUP-REQUEST");
44 e2ap_handle_X2SetupRequest(pdu, socket_fd);
47 case E2AP_PDU_PR_successfulOutcome: //successfulOutcome
48 LOG_I("[E2AP] Received X2-SETUP-RESPONSE");
49 e2ap_handle_X2SetupResponse(pdu, socket_fd);
52 case E2AP_PDU_PR_unsuccessfulOutcome:
56 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
61 case ProcedureCode_id_endcX2Setup: //ENDCX2Setup = 36
64 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
65 LOG_I("[E2AP] Received ENDC-X2-SETUP-REQUEST");
66 e2ap_handle_ENDCX2SetupRequest(pdu, socket_fd);
69 case E2AP_PDU_PR_successfulOutcome: //successfulOutcome
70 LOG_I("[E2AP] Received ENDC-X2-SETUP-RESPONSE");
74 case E2AP_PDU_PR_unsuccessfulOutcome:
75 LOG_I("[E2AP] Received ENDC-X2-SETUP-FAILURE");
80 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
85 case ProcedureCode_id_reset: //reset = 7
88 case E2AP_PDU_PR_initiatingMessage:
89 LOG_I("[E2AP] Received RESET-REQUEST");
92 case E2AP_PDU_PR_successfulOutcome:
95 case E2AP_PDU_PR_unsuccessfulOutcome:
99 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
104 case ProcedureCode_id_ricSubscription: //RIC SUBSCRIPTION = 201
107 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
108 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-REQUEST");
109 //e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
110 e2ap_handle_RICSubscriptionRequest_securityDemo(pdu, socket_fd);
113 case E2AP_PDU_PR_successfulOutcome:
114 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-RESPONSE");
117 case E2AP_PDU_PR_unsuccessfulOutcome:
118 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-FAILURE");
122 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
127 case ProcedureCode_id_ricIndication: // 205
130 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
131 LOG_I("[E2AP] Received RIC-INDICATION");
132 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
136 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
137 (int)ProcedureCode_id_ricIndication);
142 case ProcedureCode_id_resourceStatusReportingInitiation: //9
145 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
146 LOG_I("[E2AP] Received RESOURCE-STATUS-REQUEST");
147 e2ap_handle_ResourceStatusRequest(pdu, socket_fd);
150 case E2AP_PDU_PR_successfulOutcome: //successfulOutcome
151 LOG_I("[E2AP] Received RESOURCE-STATUS-RESPONSE");
154 case E2AP_PDU_PR_unsuccessfulOutcome:
155 LOG_I("[E2AP] Received RESOURCE-STATUS-FAILURE");
159 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
160 (int)ProcedureCode_id_resourceStatusReportingInitiation);
165 case ProcedureCode_id_resourceStatusReporting: // 10
168 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
169 LOG_I("[E2AP] Received RESOURCE-STATUS-UPDATE");
173 LOG_E("[E2AP] Unable to process message index=%d in E2AP-PDU %d", index,
174 (int)ProcedureCode_id_resourceStatusReporting);
180 LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);
186 Simply send back X2SetupResponse
187 Todo: add more handling options (failure, duplicated request, etc.)
189 void e2ap_handle_X2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd)
191 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_X2SetupResponse.xml");
193 LOG_D("[E2AP] Created X2-SETUP-RESPONSE");
195 e2ap_asn1c_print_pdu(res_pdu);
200 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
201 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
203 //send response data over sctp
204 if(sctp_send_data(socket_fd, data) > 0) {
205 LOG_I("[SCTP] Sent X2-SETUP-RESPONSE");
207 LOG_E("[SCTP] Unable to send X2-SETUP-RESPONSE to peer");
211 void e2ap_handle_X2SetupResponse(E2AP_PDU_t* pdu, int &socket_fd)
213 E2AP_PDU_t* req_pdu = e2ap_xml_to_pdu("E2AP_ResourceStatusRequest.xml");
214 // E2AP_PDU_t* req_pdu = e2ap_xml_to_pdu("E2AP_ResourceStatusRequest_bad.xml");
216 LOG_D("[E2AP] Created RESOURCE-STATUS-REQUEST");
218 e2ap_asn1c_print_pdu(req_pdu);
223 data.len = e2ap_asn1c_encode_pdu(req_pdu, &buf);
224 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
226 //send response data over sctp
227 if(sctp_send_data(socket_fd, data) > 0) {
228 LOG_I("[SCTP] Sent RESOURCE-STATUS-REQUEST");
230 LOG_E("[SCTP] Unable to send RESOURCE-STATUS-REQUEST to peer");
236 Simply send back ENDCX2SetupResponse
237 Todo: add more handling options (failure, duplicated request, etc.)
239 void e2ap_handle_ENDCX2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd)
241 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_ENDCX2SetupResponse.xml");
243 LOG_D("[E2AP] Created ENDC-X2-SETUP-RESPONSE");
245 e2ap_asn1c_print_pdu(res_pdu);
250 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
251 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
253 //send response data over sctp
254 if(sctp_send_data(socket_fd, data) > 0) {
255 LOG_I("[SCTP] Sent ENDC-X2-SETUP-RESPONSE");
257 LOG_E("[SCTP] Unable to send ENDC-X2-SETUP-RESPONSE to peer");
262 Simply send back hard-coded RICSubscriptionResponse
263 Todo: add more handling options (failure, duplicated request, etc.)
265 void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
267 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_RICsubscriptionResponse.xml");
269 LOG_D("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");
271 e2ap_asn1c_print_pdu(res_pdu);
276 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
277 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
279 //send response data over sctp
280 if(sctp_send_data(socket_fd, data) > 0) {
281 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
283 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
287 void e2ap_handle_RICSubscriptionRequest_securityDemo(E2AP_PDU_t* pdu, int &socket_fd)
289 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_RICsubscriptionResponse.xml");
291 LOG_D("[E2AP] Created RIC-SUBSCRIPTION-RESPONSE");
293 e2ap_asn1c_print_pdu(res_pdu);
298 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
299 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
301 //send response data over sctp
302 if(sctp_send_data(socket_fd, data) > 0) {
303 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
305 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
308 //Start sending RIC Indication
309 int count1 = 0, count2 = 0;
311 E2AP_PDU_t* indication_type1 = e2ap_xml_to_pdu("E2AP_RICindication_type1.xml");
312 E2AP_PDU_t* indication_type2 = e2ap_xml_to_pdu("E2AP_RICindication_type2.xml");
314 uint8_t *buf1, *buf2;
315 sctp_buffer_t data1, data2;
316 data1.len = e2ap_asn1c_encode_pdu(indication_type1, &buf1);
317 memcpy(data1.buffer, buf1, min(data1.len, MAX_SCTP_BUFFER));
319 data2.len = e2ap_asn1c_encode_pdu(indication_type2, &buf2);
320 memcpy(data2.buffer, buf2, min(data2.len, MAX_SCTP_BUFFER));
325 if(sctp_send_data(socket_fd, data1) > 0) {
327 LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 1, count1 = %d", count1);
329 LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");
334 if(sctp_send_data(socket_fd, data2) > 0) {
336 LOG_I("[SCTP] Sent RIC-INDICATION SgNBAdditionRequest Type 2, count2 = %d", count2);
338 LOG_E("[SCTP] Unable to send RIC-INDICATION to peer");
344 void e2ap_handle_ResourceStatusRequest(E2AP_PDU_t* pdu, int &socket_fd)
346 //send back ResourceStatusResponse, followed by resource status update
347 E2AP_PDU_t* res_pdu = e2ap_xml_to_pdu("E2AP_ResourceStatusResponse.xml");
349 LOG_D("[E2AP] Created RESOURCE-STATUS-RESPONSE");
351 e2ap_asn1c_print_pdu(res_pdu);
356 data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
357 memcpy(data.buffer, buf, min(data.len, MAX_SCTP_BUFFER));
359 //send response data over sctp
360 if(sctp_send_data(socket_fd, data) > 0) {
361 LOG_I("[SCTP] Sent RESOURCE-STATUS-RESPONSE");
363 LOG_E("[SCTP] Unable to send RESOURCE-STATUS-RESPONSE to peer");
367 //send ResourceStatusUpdate periodically
368 E2AP_PDU_t* update_pdu = e2ap_xml_to_pdu("E2AP_ResourceStatusUpdate.xml");
371 sctp_buffer_t update_data;
373 update_data.len = e2ap_asn1c_encode_pdu(update_pdu, &update_buf);
374 memcpy(update_data.buffer, update_buf, min(update_data.len, MAX_SCTP_BUFFER));
377 // e2ap_asn1c_print_pdu(update_pdu);
379 if(sctp_send_data(socket_fd, update_data) > 0) {
380 LOG_I("[SCTP] Sent RESOURCE-STATUS-UPDATE");
382 LOG_E("[SCTP] Unable to send RESOURCE-STATUS-UPDATE to peer");