3 /*****************************************************************************
\r
5 # Copyright 2020 AT&T Intellectual Property *
\r
6 # Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved. *
\r
8 # Licensed under the Apache License, Version 2.0 (the "License"); *
\r
9 # you may not use this file except in compliance with the License. *
\r
10 # You may obtain a copy of the License at *
\r
12 # http://www.apache.org/licenses/LICENSE-2.0 *
\r
14 # Unless required by applicable law or agreed to in writing, software *
\r
15 # distributed under the License is distributed on an "AS IS" BASIS, *
\r
16 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
\r
17 # See the License for the specific language governing permissions and *
\r
18 # limitations under the License. *
\r
20 ******************************************************************************/
\r
21 #include "e2ap_message_handler.hpp"
\r
23 //#include <iostream>
\r
25 #include <stdexcept>
\r
28 #include "encode_e2apv1.hpp"
\r
30 void e2ap_handle_sctp_data(int& socket_fd, sctp_buffer_t& data, bool xmlenc, E2Sim* e2sim) {
\r
31 E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
\r
32 ASN_STRUCT_RESET(asn_DEF_E2AP_PDU, pdu);
\r
34 asn_transfer_syntax syntax;
\r
36 syntax = ATS_ALIGNED_BASIC_PER;
\r
37 auto rval = asn_decode(nullptr, syntax, &asn_DEF_E2AP_PDU, (void**)&pdu, data.buffer, data.len);
\r
39 switch (rval.code) {
\r
42 LOG_E("Failed to decode E2AP data from SCTP connection");
\r
43 ASN_STRUCT_FREE(asn_DEF_E2AP_PDU, pdu);
\r
49 int procedureCode = e2ap_asn1c_get_procedureCode(pdu);
50 int index = (int)pdu->present;
52 LOG_D("Unpacked E2AP-PDU: index = %d, procedureCode = %d", index, procedureCode);
54 switch (procedureCode) {
55 case ProcedureCode_id_E2setup:
56 LOG_I("Received a message of E2 setup procedure");
\r
58 case E2AP_PDU_PR_initiatingMessage:
\r
59 e2ap_handle_E2SetupRequest(pdu, socket_fd);
\r
60 LOG_I("Received SETUP-REQUEST");
\r
63 case E2AP_PDU_PR_successfulOutcome:
\r
64 LOG_I("Received SETUP-RESPONSE-SUCCESS");
\r
67 case E2AP_PDU_PR_unsuccessfulOutcome:
\r
68 LOG_I("Received SETUP-RESPONSE-FAILURE");
\r
72 LOG_E("Invalid message index=%d in E2AP-PDU", index);
\r
77 case ProcedureCode_id_Reset: // reset = 7
\r
78 LOG_I("Received a message of Reset procedure");
\r
80 case E2AP_PDU_PR_initiatingMessage:
\r
81 LOG_I("Received RESET-REQUEST");
\r
84 case E2AP_PDU_PR_successfulOutcome:
\r
87 case E2AP_PDU_PR_unsuccessfulOutcome:
\r
91 LOG_E("Invalid message index=%d in E2AP-PDU", index);
\r
96 case ProcedureCode_id_RICsubscription: // RIC SUBSCRIPTION = 201
\r
97 LOG_I("Received a message of RIC subscription procedure");
99 case E2AP_PDU_PR_initiatingMessage: { // initiatingMessage
100 long func_id = encoding::get_function_id_from_subscription(pdu);
101 LOG_I("Received RIC subscription request for function with ID %d", func_id);
104 SubscriptionCallback cb;
105 cb = e2sim->get_subscription_callback(func_id);
106 LOG_I("Calling callback subscription function to handle subscription request to function with ID %d", func_id);
108 } catch (const std::out_of_range& e) {
109 LOG_E("No RAN Function with this ID exists\n");
115 case E2AP_PDU_PR_successfulOutcome:
116 LOG_I("Received RIC-SUBSCRIPTION-RESPONSE");
119 case E2AP_PDU_PR_unsuccessfulOutcome:
\r
120 LOG_I("Received RIC-SUBSCRIPTION-FAILURE");
\r
124 LOG_E("Invalid message index=%d in E2AP-PDU", index);
\r
129 case ProcedureCode_id_RICindication: // 205
\r
130 LOG_I("Received a message of RIC indication procedure");
\r
132 case E2AP_PDU_PR_initiatingMessage: // initiatingMessage
\r
133 LOG_I("Received RIC-INDICATION-REQUEST");
\r
134 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
\r
136 case E2AP_PDU_PR_successfulOutcome:
\r
137 LOG_I("Received RIC-INDICATION-RESPONSE");
\r
140 case E2AP_PDU_PR_unsuccessfulOutcome:
\r
141 LOG_I("Received RIC-INDICATION-FAILURE");
\r
145 LOG_E("Invalid message index=%d in E2AP-PDU %d", index, (int)ProcedureCode_id_RICindication);
\r
150 case ProcedureCode_id_RICserviceQuery:
\r
151 LOG_I("Received a message of RIC service query procedure");
\r
153 case E2AP_PDU_PR_initiatingMessage:
\r
154 LOG_I("Received RIC-Service-Query")
\r
155 e2ap_handle_E2SeviceRequest(pdu, socket_fd, e2sim);
\r
159 LOG_E("Invalid message index=%d in E2AP-PDU %d", index, (int)ProcedureCode_id_RICserviceQuery);
\r
164 case ProcedureCode_id_E2nodeConfigurationUpdate:
\r
165 LOG_I("Received a message of E2 node configuration update procedure");
\r
167 case E2AP_PDU_PR_successfulOutcome:
\r
168 LOG_I("Received E2nodeConfigurationUpdate")
\r
172 LOG_E("Invalid message index=%d in E2AP-PDU %d", index, (int)ProcedureCode_id_E2nodeConfigurationUpdate);
\r
177 case ProcedureCode_id_RICserviceUpdate:
\r
178 LOG_I("Received a message of RIC service update procedure");
\r
180 case E2AP_PDU_PR_successfulOutcome:
\r
181 LOG_I("Received RIC-SERVICE-UPDATE-SUCCESS")
\r
184 case E2AP_PDU_PR_unsuccessfulOutcome:
\r
185 LOG_I("Received RIC-SERVICE-UPDATE-FAILURE")
\r
189 LOG_E("Invalid message index=%d in E2AP-PDU %d", index, (int)ProcedureCode_id_RICserviceUpdate);
\r
195 LOG_E("No available handler for procedureCode=%d", procedureCode);
\r
198 ASN_STRUCT_FREE(asn_DEF_E2AP_PDU, pdu);
\r
201 void e2ap_handle_E2SeviceRequest(E2AP_PDU_t* pdu, int& socket_fd, E2Sim* e2sim) {
\r
202 auto buffer_size = MAX_SCTP_BUFFER;
\r
203 unsigned char buffer[MAX_SCTP_BUFFER];
\r
204 E2AP_PDU_t* res_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
\r
206 // prepare ran function defination
\r
207 std::vector<encoding::ran_func_info> all_funcs;
\r
209 // Loop through RAN function definitions that are registered
\r
211 for (std::pair<long, OCTET_STRING_t*> elem : e2sim->getRegistered_ran_functions()) {
\r
212 printf("looping through ran func\n");
\r
213 encoding::ran_func_info next_func;
\r
215 next_func.ranFunctionId = elem.first;
\r
216 next_func.ranFunctionDesc = elem.second;
\r
217 next_func.ranFunctionRev = (long)3;
\r
218 all_funcs.push_back(next_func);
\r
221 printf("about to call service update encode\n");
\r
223 encoding::generate_e2apv1_service_update(res_pdu, all_funcs);
\r
225 LOG_D("Created E2-SERVICE-UPDATE");
\r
227 e2ap_asn1c_print_pdu(res_pdu);
\r
229 sctp_buffer_t data;
\r
231 char error_buf[300] = {
\r
236 asn_check_constraints(&asn_DEF_E2AP_PDU, res_pdu, error_buf, &errlen);
\r
237 printf("error length %d\n", errlen);
\r
238 printf("error buf %s\n", error_buf);
\r
240 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, res_pdu, buffer, buffer_size);
\r
242 if (er.encoded == -1) {
\r
243 LOG_E("Failed to serialize message. Detail: %s.\n", asn_DEF_E2AP_PDU.name);
\r
245 } else if (er.encoded > buffer_size) {
\r
246 LOG_E("Buffer of size %zu is too small for %s, need %zu\n", buffer_size, asn_DEF_E2AP_PDU.name, er.encoded);
\r
250 data.len = er.encoded;
\r
252 memcpy(data.buffer, buffer, er.encoded);
\r
254 // send response data over sctp
\r
255 if (sctp_send_data(socket_fd, data) > 0) {
\r
256 LOG_I("Sent E2-SERVICE-UPDATE");
\r
258 LOG_E("Unable to send E2-SERVICE-UPDATE to peer");
\r
262 void e2ap_send_e2nodeConfigUpdate(int& socket_fd) {
\r
263 auto buffer_size = MAX_SCTP_BUFFER;
\r
264 unsigned char buffer[MAX_SCTP_BUFFER];
\r
265 E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
\r
267 LOG_I("Generating E2 node configure update");
\r
269 encoding::generate_e2apv2_config_update(pdu);
\r
271 e2ap_asn1c_print_pdu(pdu);
\r
273 sctp_buffer_t data;
\r
275 char error_buf[300] = {
\r
280 asn_check_constraints(&asn_DEF_E2AP_PDU, pdu, error_buf, &errlen);
\r
282 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu, buffer, buffer_size);
\r
284 if (er.encoded == -1) {
\r
285 LOG_E("Failed to serialize message. Detail: %s.\n", asn_DEF_E2AP_PDU.name);
\r
287 } else if (er.encoded > buffer_size) {
\r
288 LOG_E("Buffer of size %zu is too small for %s, need %zu\n", buffer_size, asn_DEF_E2AP_PDU.name, er.encoded);
\r
292 data.len = er.encoded;
\r
294 memcpy(data.buffer, buffer, er.encoded);
\r
296 // send response data over sctp
\r
297 if (sctp_send_data(socket_fd, data) > 0) {
\r
298 LOG_I("Sent E2nodeConfigUpdate");
\r
300 LOG_E("[SCTP] Unable to send E2nodeConfigUpdate to peer");
\r
304 void e2ap_handle_E2SetupRequest(E2AP_PDU_t* pdu, int& socket_fd) {
\r
305 E2AP_PDU_t* res_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
\r
306 encoding::generate_e2apv1_setup_response(res_pdu);
\r
308 LOG_D("Created E2-SETUP-RESPONSE");
\r
310 e2ap_asn1c_print_pdu(res_pdu);
\r
312 auto buffer_size = MAX_SCTP_BUFFER;
\r
313 unsigned char buffer[MAX_SCTP_BUFFER];
\r
315 sctp_buffer_t data;
\r
316 auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, res_pdu, buffer, buffer_size);
\r
318 if (er.encoded == -1) {
\r
319 LOG_E("Failed to serialize message. Detail: %s.\n", asn_DEF_E2AP_PDU.name);
\r
321 } else if (er.encoded > buffer_size) {
\r
322 LOG_E("Buffer of size %zu is too small for %s, need %zu\n", buffer_size, asn_DEF_E2AP_PDU.name, er.encoded);
\r
326 data.len = er.encoded;
\r
328 memcpy(data.buffer, buffer, er.encoded);
\r
330 // send response data over sctp
\r
331 if (sctp_send_data(socket_fd, data) > 0) {
\r
332 LOG_I("Sent E2-SETUP-RESPONSE");
\r
334 LOG_E("[SCTP] Unable to send E2-SETUP-RESPONSE to peer");
\r
339 // Sending Subscription Request
\r
341 E2AP_PDU_t* pdu_sub = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
\r
343 encoding::generate_e2apv1_subscription_request(pdu_sub);
\r
345 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_sub);
\r
347 auto buffer_size2 = MAX_SCTP_BUFFER;
\r
348 unsigned char buffer2[MAX_SCTP_BUFFER];
\r
350 sctp_buffer_t data2;
\r
352 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_sub, buffer2, buffer_size2);
\r
354 if (er2.encoded == -1) {
\r
355 LOG_E("Failed to serialize message. Detail: %s.\n", asn_DEF_E2AP_PDU.name);
\r
357 } else if (er2.encoded > buffer_size2) {
\r
358 LOG_E("Buffer of size %zu is too small for %s, need %zu\n", buffer_size2, asn_DEF_E2AP_PDU.name, er2.encoded);
\r
362 data2.len = er2.encoded;
\r
363 memcpy(data2.buffer, buffer2, er2.encoded);
\r
365 if (sctp_send_data(socket_fd, data2) > 0) {
\r
366 LOG_I("Sent E2-SUBSCRIPTION-REQUEST");
\r
368 LOG_E("[SCTP] Unable to send E2-SUBSCRIPTION-REQUEST to peer");
\r
373 void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
\r
376 //Send back Subscription Success Response
\r
378 E2AP_PDU_t* pdu_resp = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
\r
380 generate_e2apv1_subscription_response(pdu_resp, pdu);
\r
382 fprintf(stderr, "Subscription Response\n");
\r
384 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_resp);
\r
386 auto buffer_size2 = MAX_SCTP_BUFFER;
\r
387 unsigned char buffer2[MAX_SCTP_BUFFER];
\r
389 sctp_buffer_t data2;
\r
391 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_resp, buffer2, buffer_size2);
\r
392 data2.len = er2.encoded;
\r
394 fprintf(stderr, "er encded is %d\n", er2.encoded);
\r
396 memcpy(data2.buffer, buffer2, er2.encoded);
\r
398 if(sctp_send_data(socket_fd, data2) > 0) {
\r
399 LOG_I("Sent RIC-SUBSCRIPTION-RESPONSE");
\r
401 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
\r
405 //Send back an Indication
\r
407 E2AP_PDU_t* pdu_ind = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
\r
409 generate_e2apv1_indication_request(pdu_ind);
\r
411 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_ind);
\r
413 auto buffer_size = MAX_SCTP_BUFFER;
\r
414 unsigned char buffer[MAX_SCTP_BUFFER];
\r
416 sctp_buffer_t data;
\r
418 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_ind, buffer, buffer_size);
\r
419 data.len = er.encoded;
\r
421 fprintf(stderr, "er encded is %d\n", er.encoded);
\r
423 memcpy(data.buffer, buffer, er.encoded);
\r
425 if(sctp_send_data(socket_fd, data) > 0) {
\r
426 LOG_I("Sent RIC-INDICATION-REQUEST");
\r
428 LOG_E("[SCTP] Unable to send RIC-INDICATION-REQUEST to peer");
\r