3 /*****************************************************************************
5 # Copyright 2019 AT&T Intellectual Property *
6 # Copyright 2019 Nokia *
8 # Licensed under the Apache License, Version 2.0 (the "License"); *
9 # you may not use this file except in compliance with the License. *
10 # You may obtain a copy of the License at *
12 # http://www.apache.org/licenses/LICENSE-2.0 *
14 # Unless required by applicable law or agreed to in writing, software *
15 # distributed under the License is distributed on an "AS IS" BASIS, *
16 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
17 # See the License for the specific language governing permissions and *
18 # limitations under the License. *
20 ******************************************************************************/
21 #include "e2ap_message_handler.hpp"
26 #include "encode_e2apv1.hpp"
27 #include "kpm_callbacks.hpp"
31 void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data, bool xmlenc, E2Sim *e2sim)
33 fprintf(stderr, "in e2ap_handle_sctp_data()\n");
34 //decode the data into E2AP-PDU
35 E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
36 ASN_STRUCT_RESET(asn_DEF_E2AP_PDU, pdu);
38 fprintf(stderr, "decoding...\n");
40 asn_transfer_syntax syntax;
43 syntax = ATS_ALIGNED_BASIC_PER;
46 fprintf(stderr, "full buffer\n%s\n", data.buffer);
47 // e2ap_asn1c_decode_pdu(pdu, data.buffer, data.len);
49 auto rval = asn_decode(nullptr, syntax, &asn_DEF_E2AP_PDU, (void **) &pdu,
50 data.buffer, data.len);
53 int index = (int)pdu->present;
54 fprintf(stderr, "length of data %d\n", rval.consumed);
55 fprintf(stderr, "result %d\n", rval.code);
56 fprintf(stderr, "index is %d\n", index);
58 fprintf(stderr, "showing xer of data\n");
60 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu);
62 int procedureCode = e2ap_asn1c_get_procedureCode(pdu);
63 index = (int)pdu->present;
65 LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",
66 index, procedureCode);
71 case ProcedureCode_id_E2setup:
74 case E2AP_PDU_PR_initiatingMessage:
75 e2ap_handle_E2SetupRequest(pdu, socket_fd);
76 LOG_I("[E2AP] Received SETUP-REQUEST");
79 case E2AP_PDU_PR_successfulOutcome:
80 LOG_I("[E2AP] Received SETUP-RESPONSE-SUCCESS");
83 case E2AP_PDU_PR_unsuccessfulOutcome:
84 LOG_I("[E2AP] Received SETUP-RESPONSE-FAILURE");
88 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
93 case ProcedureCode_id_Reset: //reset = 7
96 case E2AP_PDU_PR_initiatingMessage:
97 LOG_I("[E2AP] Received RESET-REQUEST");
100 case E2AP_PDU_PR_successfulOutcome:
103 case E2AP_PDU_PR_unsuccessfulOutcome:
107 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
112 case ProcedureCode_id_RICsubscription: //RIC SUBSCRIPTION = 201
115 case E2AP_PDU_PR_initiatingMessage: { //initiatingMessage
116 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-REQUEST");
117 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
118 long func_id = get_function_id_from_subscription(pdu);
119 SubscriptionCallback cb = e2sim->get_subscription_callback(func_id);
121 // callback_kpm_subscription_request(pdu, socket_fd);
126 case E2AP_PDU_PR_successfulOutcome:
127 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-RESPONSE");
130 case E2AP_PDU_PR_unsuccessfulOutcome:
131 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-FAILURE");
135 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
140 case ProcedureCode_id_RICindication: // 205
143 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
144 LOG_I("[E2AP] Received RIC-INDICATION-REQUEST");
145 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
147 case E2AP_PDU_PR_successfulOutcome:
148 LOG_I("[E2AP] Received RIC-INDICATION-RESPONSE");
151 case E2AP_PDU_PR_unsuccessfulOutcome:
152 LOG_I("[E2AP] Received RIC-INDICATION-FAILURE");
156 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
157 (int)ProcedureCode_id_RICindication);
164 LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);
170 void e2ap_handle_E2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd) {
173 E2AP_PDU_t* res_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
174 generate_e2apv1_setup_response(res_pdu);
177 LOG_D("[E2AP] Created E2-SETUP-RESPONSE");
179 e2ap_asn1c_print_pdu(res_pdu);
182 auto buffer_size = MAX_SCTP_BUFFER;
183 unsigned char buffer[MAX_SCTP_BUFFER];
186 auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, res_pdu, buffer, buffer_size);
188 data.len = er.encoded;
189 fprintf(stderr, "er encoded is %d\n", er.encoded);
191 //data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
192 memcpy(data.buffer, buffer, er.encoded);
194 //send response data over sctp
195 if(sctp_send_data(socket_fd, data) > 0) {
196 LOG_I("[SCTP] Sent E2-SETUP-RESPONSE");
198 LOG_E("[SCTP] Unable to send E2-SETUP-RESPONSE to peer");
203 //Sending Subscription Request
205 E2AP_PDU_t* pdu_sub = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
207 generate_e2apv1_subscription_request(pdu_sub);
209 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_sub);
211 auto buffer_size2 = MAX_SCTP_BUFFER;
212 unsigned char buffer2[MAX_SCTP_BUFFER];
216 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_sub, buffer2, buffer_size2);
218 data2.len = er2.encoded;
219 memcpy(data2.buffer, buffer2, er2.encoded);
221 fprintf(stderr, "er encded is %d\n", er2.encoded);
223 if(sctp_send_data(socket_fd, data2) > 0) {
224 LOG_I("[SCTP] Sent E2-SUBSCRIPTION-REQUEST");
226 LOG_E("[SCTP] Unable to send E2-SUBSCRIPTION-REQUEST to peer");
233 void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
236 //Send back Subscription Success Response
238 E2AP_PDU_t* pdu_resp = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
240 generate_e2apv1_subscription_response(pdu_resp, pdu);
242 fprintf(stderr, "Subscription Response\n");
244 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_resp);
246 auto buffer_size2 = MAX_SCTP_BUFFER;
247 unsigned char buffer2[MAX_SCTP_BUFFER];
251 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_resp, buffer2, buffer_size2);
252 data2.len = er2.encoded;
254 fprintf(stderr, "er encded is %d\n", er2.encoded);
256 memcpy(data2.buffer, buffer2, er2.encoded);
258 if(sctp_send_data(socket_fd, data2) > 0) {
259 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
261 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
265 //Send back an Indication
267 E2AP_PDU_t* pdu_ind = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
269 generate_e2apv1_indication_request(pdu_ind);
271 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_ind);
273 auto buffer_size = MAX_SCTP_BUFFER;
274 unsigned char buffer[MAX_SCTP_BUFFER];
278 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_ind, buffer, buffer_size);
279 data.len = er.encoded;
281 fprintf(stderr, "er encded is %d\n", er.encoded);
283 memcpy(data.buffer, buffer, er.encoded);
285 if(sctp_send_data(socket_fd, data) > 0) {
286 LOG_I("[SCTP] Sent RIC-INDICATION-REQUEST");
288 LOG_E("[SCTP] Unable to send RIC-INDICATION-REQUEST to peer");