--- /dev/null
+
+
+/*****************************************************************************
+# *
+# Copyright 2019 AT&T Intellectual Property *
+# Copyright 2019 Nokia *
+# *
+# Licensed under the Apache License, Version 2.0 (the "License"); *
+# you may not use this file except in compliance with the License. *
+# You may obtain a copy of the License at *
+# *
+# http://www.apache.org/licenses/LICENSE-2.0 *
+# *
+# Unless required by applicable law or agreed to in writing, software *
+# distributed under the License is distributed on an "AS IS" BASIS, *
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
+# See the License for the specific language governing permissions and *
+# limitations under the License. *
+# *
+******************************************************************************/
+#include "e2ap_message_handler.hpp"
+
+//#include <iostream>
+//#include <vector>
+
+#include "encode_e2apv1.hpp"
+#include "kpm_callbacks.hpp"
+
+#include <unistd.h>
+
+void e2ap_handle_sctp_data(int &socket_fd, sctp_buffer_t &data, bool xmlenc, E2Sim *e2sim)
+{
+ fprintf(stderr, "in e2ap_handle_sctp_data()\n");
+ //decode the data into E2AP-PDU
+ E2AP_PDU_t* pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
+ ASN_STRUCT_RESET(asn_DEF_E2AP_PDU, pdu);
+
+ fprintf(stderr, "decoding...\n");
+
+ asn_transfer_syntax syntax;
+
+
+ syntax = ATS_ALIGNED_BASIC_PER;
+
+
+ fprintf(stderr, "full buffer\n%s\n", data.buffer);
+ // e2ap_asn1c_decode_pdu(pdu, data.buffer, data.len);
+
+ auto rval = asn_decode(nullptr, syntax, &asn_DEF_E2AP_PDU, (void **) &pdu,
+ data.buffer, data.len);
+
+
+ int index = (int)pdu->present;
+ fprintf(stderr, "length of data %d\n", rval.consumed);
+ fprintf(stderr, "result %d\n", rval.code);
+ fprintf(stderr, "index is %d\n", index);
+
+ fprintf(stderr, "showing xer of data\n");
+
+ xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu);
+
+ int procedureCode = e2ap_asn1c_get_procedureCode(pdu);
+ index = (int)pdu->present;
+
+ LOG_D("[E2AP] Unpacked E2AP-PDU: index = %d, procedureCode = %d\n",
+ index, procedureCode);
+
+ switch(procedureCode)
+ {
+
+ case ProcedureCode_id_E2setup:
+ switch(index)
+ {
+ case E2AP_PDU_PR_initiatingMessage:
+ e2ap_handle_E2SetupRequest(pdu, socket_fd);
+ LOG_I("[E2AP] Received SETUP-REQUEST");
+ break;
+
+ case E2AP_PDU_PR_successfulOutcome:
+ LOG_I("[E2AP] Received SETUP-RESPONSE-SUCCESS");
+ break;
+
+ case E2AP_PDU_PR_unsuccessfulOutcome:
+ LOG_I("[E2AP] Received SETUP-RESPONSE-FAILURE");
+ break;
+
+ default:
+ LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
+ break;
+ }
+ break;
+
+ case ProcedureCode_id_Reset: //reset = 7
+ switch(index)
+ {
+ case E2AP_PDU_PR_initiatingMessage:
+ LOG_I("[E2AP] Received RESET-REQUEST");
+ break;
+
+ case E2AP_PDU_PR_successfulOutcome:
+ break;
+
+ case E2AP_PDU_PR_unsuccessfulOutcome:
+ break;
+
+ default:
+ LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
+ break;
+ }
+ break;
+
+ case ProcedureCode_id_RICsubscription: //RIC SUBSCRIPTION = 201
+ switch(index)
+ {
+ case E2AP_PDU_PR_initiatingMessage: { //initiatingMessage
+ LOG_I("[E2AP] Received RIC-SUBSCRIPTION-REQUEST");
+ // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
+ long func_id = get_function_id_from_subscription(pdu);
+ SubscriptionCallback cb = e2sim->get_subscription_callback(func_id);
+ cb(pdu,socket_fd);
+ // callback_kpm_subscription_request(pdu, socket_fd);
+ // e2ap_handle_RICSubscriptionRequest_securityDemo(pdu, socket_fd);
+ }
+ break;
+
+ case E2AP_PDU_PR_successfulOutcome:
+ LOG_I("[E2AP] Received RIC-SUBSCRIPTION-RESPONSE");
+ break;
+
+ case E2AP_PDU_PR_unsuccessfulOutcome:
+ LOG_I("[E2AP] Received RIC-SUBSCRIPTION-FAILURE");
+ break;
+
+ default:
+ LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU", index);
+ break;
+ }
+ break;
+
+ case ProcedureCode_id_RICindication: // 205
+ switch(index)
+ {
+ case E2AP_PDU_PR_initiatingMessage: //initiatingMessage
+ LOG_I("[E2AP] Received RIC-INDICATION-REQUEST");
+ // e2ap_handle_RICSubscriptionRequest(pdu, socket_fd);
+ break;
+ case E2AP_PDU_PR_successfulOutcome:
+ LOG_I("[E2AP] Received RIC-INDICATION-RESPONSE");
+ break;
+
+ case E2AP_PDU_PR_unsuccessfulOutcome:
+ LOG_I("[E2AP] Received RIC-INDICATION-FAILURE");
+ break;
+
+ default:
+ LOG_E("[E2AP] Invalid message index=%d in E2AP-PDU %d", index,
+ (int)ProcedureCode_id_RICindication);
+ break;
+ }
+ break;
+
+ default:
+
+ LOG_E("[E2AP] No available handler for procedureCode=%d", procedureCode);
+
+ break;
+ }
+}
+
+void e2ap_handle_E2SetupRequest(E2AP_PDU_t* pdu, int &socket_fd) {
+
+
+ E2AP_PDU_t* res_pdu = (E2AP_PDU_t*)calloc(1, sizeof(E2AP_PDU));
+ generate_e2apv1_setup_response(res_pdu);
+
+
+ LOG_D("[E2AP] Created E2-SETUP-RESPONSE");
+
+ e2ap_asn1c_print_pdu(res_pdu);
+
+
+ auto buffer_size = MAX_SCTP_BUFFER;
+ unsigned char buffer[MAX_SCTP_BUFFER];
+
+ sctp_buffer_t data;
+ auto er = asn_encode_to_buffer(nullptr, ATS_BASIC_XER, &asn_DEF_E2AP_PDU, res_pdu, buffer, buffer_size);
+
+ data.len = er.encoded;
+ fprintf(stderr, "er encoded is %d\n", er.encoded);
+
+ //data.len = e2ap_asn1c_encode_pdu(res_pdu, &buf);
+ memcpy(data.buffer, buffer, er.encoded);
+
+ //send response data over sctp
+ if(sctp_send_data(socket_fd, data) > 0) {
+ LOG_I("[SCTP] Sent E2-SETUP-RESPONSE");
+ } else {
+ LOG_E("[SCTP] Unable to send E2-SETUP-RESPONSE to peer");
+ }
+
+ sleep(5);
+
+ //Sending Subscription Request
+
+ E2AP_PDU_t* pdu_sub = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
+
+ generate_e2apv1_subscription_request(pdu_sub);
+
+ xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_sub);
+
+ auto buffer_size2 = MAX_SCTP_BUFFER;
+ unsigned char buffer2[MAX_SCTP_BUFFER];
+
+ sctp_buffer_t data2;
+
+ auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_sub, buffer2, buffer_size2);
+
+ data2.len = er2.encoded;
+ memcpy(data2.buffer, buffer2, er2.encoded);
+
+ fprintf(stderr, "er encded is %d\n", er2.encoded);
+
+ if(sctp_send_data(socket_fd, data2) > 0) {
+ LOG_I("[SCTP] Sent E2-SUBSCRIPTION-REQUEST");
+ } else {
+ LOG_E("[SCTP] Unable to send E2-SUBSCRIPTION-REQUEST to peer");
+ }
+
+
+}
+
+
+void e2ap_handle_RICSubscriptionRequest(E2AP_PDU_t* pdu, int &socket_fd)
+{
+
+ //Send back Subscription Success Response
+
+ E2AP_PDU_t* pdu_resp = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
+
+ generate_e2apv1_subscription_response(pdu_resp, pdu);
+
+ fprintf(stderr, "Subscription Response\n");
+
+ xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_resp);
+
+ auto buffer_size2 = MAX_SCTP_BUFFER;
+ unsigned char buffer2[MAX_SCTP_BUFFER];
+
+ sctp_buffer_t data2;
+
+ auto er2 = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_resp, buffer2, buffer_size2);
+ data2.len = er2.encoded;
+
+ fprintf(stderr, "er encded is %d\n", er2.encoded);
+
+ memcpy(data2.buffer, buffer2, er2.encoded);
+
+ if(sctp_send_data(socket_fd, data2) > 0) {
+ LOG_I("[SCTP] Sent RIC-SUBSCRIPTION-RESPONSE");
+ } else {
+ LOG_E("[SCTP] Unable to send RIC-SUBSCRIPTION-RESPONSE to peer");
+ }
+
+
+ //Send back an Indication
+
+ E2AP_PDU_t* pdu_ind = (E2AP_PDU_t*)calloc(1,sizeof(E2AP_PDU));
+
+ generate_e2apv1_indication_request(pdu_ind);
+
+ xer_fprint(stderr, &asn_DEF_E2AP_PDU, pdu_ind);
+
+ auto buffer_size = MAX_SCTP_BUFFER;
+ unsigned char buffer[MAX_SCTP_BUFFER];
+
+ sctp_buffer_t data;
+
+ auto er = asn_encode_to_buffer(nullptr, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, pdu_ind, buffer, buffer_size);
+ data.len = er.encoded;
+
+ fprintf(stderr, "er encded is %d\n", er.encoded);
+
+ memcpy(data.buffer, buffer, er.encoded);
+
+ if(sctp_send_data(socket_fd, data) > 0) {
+ LOG_I("[SCTP] Sent RIC-INDICATION-REQUEST");
+ } else {
+ LOG_E("[SCTP] Unable to send RIC-INDICATION-REQUEST to peer");
+ }
+
+}
+
+
+
+
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