1 /*****************************************************************************
3 # Copyright 2019 AT&T Intellectual Property *
4 # Copyright 2019 Nokia *
5 # Copyright (c) 2020 Samsung Electronics Co., Ltd. All Rights Reserved. *
7 # Licensed under the Apache License, Version 2.0 (the "License"); *
8 # you may not use this file except in compliance with the License. *
9 # You may obtain a copy of the License at *
11 # http://www.apache.org/licenses/LICENSE-2.0 *
13 # Unless required by applicable law or agreed to in writing, software *
14 # distributed under the License is distributed on an "AS IS" BASIS, *
15 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
16 # See the License for the specific language governing permissions and *
17 # limitations under the License. *
19 ******************************************************************************/
20 #include "e2ap_message_handler.hpp"
25 #include "encode_e2apv1.hpp"
30 void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data, bool xmlenc)
32 fprintf(stderr, "in e2ap_handle_sctp_data()\n");
33 //decode the data into E2AP-PDU
34 E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
35 ASN_STRUCT_RESET(asn_DEF_E2AP_PDU, pdu);
37 fprintf(stderr, "decoding...\n");
39 asn_transfer_syntax syntax;
42 syntax = ATS_ALIGNED_BASIC_PER;
45 fprintf(stderr, "full buffer\n%s\n", data.buffer);
46 // e2ap_asn1c_decode_pdu(pdu, data.buffer, data.len);
48 auto rval = asn_decode(nullptr, syntax, &asn_DEF_E2AP_PDU, (void **) &pdu,
49 data.buffer, data.len);
52 int index = (int)pdu->present;
53 fprintf(stderr, "length of data %d\n", rval.consumed);
54 fprintf(stderr, "result %d\n", rval.code);
55 fprintf(stderr, "index is %d\n", index);
57 fprintf(stderr, "showing xer of data\n");
59 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu);
61 int procedureCode = e2ap_asn1c_get_procedureCode(pdu);
62 index = (int)pdu->present;
64 LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",
65 index, procedureCode);
70 case ProcedureCode_id_E2setup:
73 case E2AP_PDU_PR_initiatingMessage:
74 e2ap_handle_E2SetupRequest(pdu, socket_fd);
75 LOG_I("[E2AP] Received SETUP-REQUEST");
78 case E2AP_PDU_PR_successfulOutcome:
79 LOG_I("[E2AP] Received SETUP-RESPONSE-SUCCESS");
82 case E2AP_PDU_PR_unsuccessfulOutcome:
83 LOG_I("[E2AP] Received SETUP-RESPONSE-FAILURE");
87 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
92 case ProcedureCode_id_Reset: //reset = 7
95 case E2AP_PDU_PR_initiatingMessage:
96 LOG_I("[E2AP] Received RESET-REQUEST");
99 case E2AP_PDU_PR_successfulOutcome:
102 case E2AP_PDU_PR_unsuccessfulOutcome:
106 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
111 case ProcedureCode_id_RICindication: // 205
114 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
115 LOG_I("[E2AP] Received RIC-INDICATION-REQUEST");
116 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
118 case E2AP_PDU_PR_successfulOutcome:
119 LOG_I("[E2AP] Received RIC-INDICATION-RESPONSE");
122 case E2AP_PDU_PR_unsuccessfulOutcome:
123 LOG_I("[E2AP] Received RIC-INDICATION-FAILURE");
127 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
128 (int)ProcedureCode_id_RICindication);
133 case ProcedureCode_id_RICserviceQuery:
136 case E2AP_PDU_PR_initiatingMessage:
137 LOG_I("[E2AP] Received RIC-Service-Query")
138 e2ap_handle_E2SeviceUpdate(pdu, socket_fd);
142 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
143 (int)ProcedureCode_id_RICserviceQuery);
148 case ProcedureCode_id_RICserviceUpdate:
151 case E2AP_PDU_PR_successfulOutcome:
152 LOG_I("[E2AP] Received RIC-SERVICE-UPDATE-SUCCESS")
155 case E2AP_PDU_PR_unsuccessfulOutcome:
156 LOG_I("[E2AP] Received RIC-SERVICE-UPDATE-FAILURE")
160 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
161 (int)ProcedureCode_id_RICserviceUpdate);
168 LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);
174 void e2ap_handle_E2SeviceUpdate(E2AP_PDU_t* pdu, int &socket_fd) {
176 auto buffer_size = MAX_SCTP_BUFFER;
177 unsigned char buffer[MAX_SCTP_BUFFER];
178 E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
179 generate_e2apv1_service_update(pdu);
181 printf("After generating e2setup req\n");
183 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu);
185 printf("After XER Encoding\n");
189 char *error_buf = (char*)calloc(300, sizeof(char));
192 asn_check_constraints(&asn_DEF_E2AP_PDU, pdu, error_buf, &errlen);
193 printf("error length %d\n", errlen);
194 printf("error buf %s\n", error_buf);
196 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu, buffer, buffer_size);
197 //auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, pdu_setup, buffer, buffer_size);
198 data.len = er.encoded;
199 fprintf(stderr, "er encoded is %d\n", er.encoded);
201 memcpy(data.buffer, buffer, er.encoded);
203 //send response data over sctp
204 if(sctp_send_data(socket_fd, data) > 0) {
205 LOG_I("[SCTP] Sent E2-SERVICE-UPDATE");
207 LOG_E("[SCTP] Unable to send E2-SERVICE-UPDATE to peer");
211 void e2ap_handle_E2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd) {
214 E2AP_PDU_t* res_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
215 generate_e2apv1_setup_response(res_pdu);
218 LOG_D("[E2AP] Created E2-SETUP-RESPONSE");
220 e2ap_asn1c_print_pdu(res_pdu);
223 auto buffer_size = MAX_SCTP_BUFFER;
224 unsigned char buffer[MAX_SCTP_BUFFER];
227 auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, res_pdu, buffer, buffer_size);
229 data.len = er.encoded;
230 fprintf(stderr, "er encoded is %d\n", er.encoded);
232 //data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
233 memcpy(data.buffer, buffer, er.encoded);
235 //send response data over sctp
236 if(sctp_send_data(socket_fd, data) > 0) {
237 LOG_I("[SCTP] Sent E2-SETUP-RESPONSE");
239 LOG_E("[SCTP] Unable to send E2-SETUP-RESPONSE to peer");
244 //Sending Subscription Request
246 E2AP_PDU_t* pdu_sub = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
248 generate_e2apv1_subscription_request(pdu_sub);
250 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_sub);
252 auto buffer_size2 = MAX_SCTP_BUFFER;
253 unsigned char buffer2[MAX_SCTP_BUFFER];
257 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_sub, buffer2, buffer_size2);
259 data2.len = er2.encoded;
260 memcpy(data2.buffer, buffer2, er2.encoded);
262 fprintf(stderr, "er encded is %d\n", er2.encoded);
264 if(sctp_send_data(socket_fd, data2) > 0) {
265 LOG_I("[SCTP] Sent E2-SUBSCRIPTION-REQUEST");
267 LOG_E("[SCTP] Unable to send E2-SUBSCRIPTION-REQUEST to peer");
274 void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
277 //Send back Subscription Success Response
279 E2AP_PDU_t* pdu_resp = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
281 generate_e2apv1_subscription_response(pdu_resp, pdu);
283 fprintf(stderr, "Subscription Response\n");
285 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_resp);
287 auto buffer_size2 = MAX_SCTP_BUFFER;
288 unsigned char buffer2[MAX_SCTP_BUFFER];
292 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_resp, buffer2, buffer_size2);
293 data2.len = er2.encoded;
295 fprintf(stderr, "er encded is %d\n", er2.encoded);
297 memcpy(data2.buffer, buffer2, er2.encoded);
299 if(sctp_send_data(socket_fd, data2) > 0) {
300 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
302 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
306 //Send back an Indication
308 E2AP_PDU_t* pdu_ind = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
310 generate_e2apv1_indication_request(pdu_ind);
312 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_ind);
314 auto buffer_size = MAX_SCTP_BUFFER;
315 unsigned char buffer[MAX_SCTP_BUFFER];
319 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_ind, buffer, buffer_size);
320 data.len = er.encoded;
322 fprintf(stderr, "er encded is %d\n", er.encoded);
324 memcpy(data.buffer, buffer, er.encoded);
326 if(sctp_send_data(socket_fd, data) > 0) {
327 LOG_I("[SCTP] Sent RIC-INDICATION-REQUEST");
329 LOG_E("[SCTP] Unable to send RIC-INDICATION-REQUEST to peer");