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"
25 #include "encode_e2apv1.hpp"
26 #include "kpm_callbacks.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_RICsubscription: //RIC SUBSCRIPTION = 201
114 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
115 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-REQUEST");
116 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
117 callback_kpm_subscription_request(pdu, socket_fd);
118 // e2ap_handle_RICSubscriptionRequest_securityDemo(pdu, socket_fd);
121 case E2AP_PDU_PR_successfulOutcome:
122 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-RESPONSE");
125 case E2AP_PDU_PR_unsuccessfulOutcome:
126 LOG_I("[E2AP] Received RIC-SUBSCRIPTION-FAILURE");
130 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
135 case ProcedureCode_id_RICindication: // 205
138 case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
139 LOG_I("[E2AP] Received RIC-INDICATION-REQUEST");
140 // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
142 case E2AP_PDU_PR_successfulOutcome:
143 LOG_I("[E2AP] Received RIC-INDICATION-RESPONSE");
146 case E2AP_PDU_PR_unsuccessfulOutcome:
147 LOG_I("[E2AP] Received RIC-INDICATION-FAILURE");
151 LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
152 (int)ProcedureCode_id_RICindication);
159 LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);
165 void e2ap_handle_E2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd) {
168 E2AP_PDU_t* res_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
169 generate_e2apv1_setup_response(res_pdu);
172 LOG_D("[E2AP] Created E2-SETUP-RESPONSE");
174 e2ap_asn1c_print_pdu(res_pdu);
177 auto buffer_size = MAX_SCTP_BUFFER;
178 unsigned char buffer[MAX_SCTP_BUFFER];
181 auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, res_pdu, buffer, buffer_size);
183 data.len = er.encoded;
184 fprintf(stderr, "er encoded is %d\n", er.encoded);
186 //data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
187 memcpy(data.buffer, buffer, er.encoded);
189 //send response data over sctp
190 if(sctp_send_data(socket_fd, data) > 0) {
191 LOG_I("[SCTP] Sent E2-SETUP-RESPONSE");
193 LOG_E("[SCTP] Unable to send E2-SETUP-RESPONSE to peer");
198 //Sending Subscription Request
200 E2AP_PDU_t* pdu_sub = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
202 generate_e2apv1_subscription_request(pdu_sub);
204 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_sub);
206 auto buffer_size2 = MAX_SCTP_BUFFER;
207 unsigned char buffer2[MAX_SCTP_BUFFER];
211 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_sub, buffer2, buffer_size2);
213 data2.len = er2.encoded;
214 memcpy(data2.buffer, buffer2, er2.encoded);
216 fprintf(stderr, "er encded is %d\n", er2.encoded);
218 if(sctp_send_data(socket_fd, data2) > 0) {
219 LOG_I("[SCTP] Sent E2-SUBSCRIPTION-REQUEST");
221 LOG_E("[SCTP] Unable to send E2-SUBSCRIPTION-REQUEST to peer");
228 void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
231 //Send back Subscription Success Response
233 E2AP_PDU_t* pdu_resp = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
235 generate_e2apv1_subscription_response(pdu_resp, pdu);
237 fprintf(stderr, "Subscription Response\n");
239 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_resp);
241 auto buffer_size2 = MAX_SCTP_BUFFER;
242 unsigned char buffer2[MAX_SCTP_BUFFER];
246 auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_resp, buffer2, buffer_size2);
247 data2.len = er2.encoded;
249 fprintf(stderr, "er encded is %d\n", er2.encoded);
251 memcpy(data2.buffer, buffer2, er2.encoded);
253 if(sctp_send_data(socket_fd, data2) > 0) {
254 LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
256 LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
260 //Send back an Indication
262 E2AP_PDU_t* pdu_ind = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
264 generate_e2apv1_indication_request(pdu_ind);
266 xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_ind);
268 auto buffer_size = MAX_SCTP_BUFFER;
269 unsigned char buffer[MAX_SCTP_BUFFER];
273 auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_ind, buffer, buffer_size);
274 data.len = er.encoded;
276 fprintf(stderr, "er encded is %d\n", er.encoded);
278 memcpy(data.buffer, buffer, er.encoded);
280 if(sctp_send_data(socket_fd, data) > 0) {
281 LOG_I("[SCTP] Sent RIC-INDICATION-REQUEST");
283 LOG_E("[SCTP] Unable to send RIC-INDICATION-REQUEST to peer");