307 lines
12 KiB
C++
307 lines
12 KiB
C++
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/*
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==================================================================================
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Copyright (c) 2019-2020 AT&T Intellectual Property.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================================
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*/
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#include "subscription_request.hpp"
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// Set up memory allocations for each IE for encoding
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// We are responsible for memory management for each IE for encoding
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// Hence destructor should clear out memory
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// When decoding, we rely on asn1c macro (ASN_STRUCT_FREE to be called
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// for releasing memory by external calling function)
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subscription_request::subscription_request(void){
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_name = "default";
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e2ap_pdu_obj = 0;
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e2ap_pdu_obj = (E2AP_PDU_t * )calloc(1, sizeof(E2AP_PDU_t));
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assert(e2ap_pdu_obj != 0);
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initMsg = 0;
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initMsg = (InitiatingMessage_t * )calloc(1, sizeof(InitiatingMessage_t));
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assert(initMsg != 0);
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IE_array = 0;
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IE_array = (RICsubscriptionRequest_IEs_t *)calloc(NUM_SUBSCRIPTION_REQUEST_IES, sizeof(RICsubscriptionRequest_IEs_t));
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assert(IE_array != 0);
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action_array = 0;
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action_array = (RICaction_ToBeSetup_ItemIEs_t *)calloc(INITIAL_REQUEST_LIST_SIZE, sizeof(RICaction_ToBeSetup_ItemIEs_t));
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assert(action_array != 0);
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action_array_size = INITIAL_REQUEST_LIST_SIZE;
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// also need to add subsequent action and time to wait ..
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for (unsigned int i = 0; i < action_array_size; i++){
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action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction = (struct RICsubsequentAction *)calloc(1, sizeof(struct RICsubsequentAction));
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assert(action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction != 0);
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}
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e2ap_pdu_obj->choice.initiatingMessage = initMsg;
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e2ap_pdu_obj->present = E2AP_PDU_PR_initiatingMessage;
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};
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// Clear assigned protocolIE list from RIC indication IE container
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subscription_request::~subscription_request(void){
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mdclog_write(MDCLOG_DEBUG, "Freeing subscription request memory");;
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// Sequence of actions to be admitted causes special heart-ache. Free ric subscription element manually and reset the ie pointer
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RICsubscriptionDetails_t * ricsubscription_ie = &(IE_array[2].value.choice.RICsubscriptionDetails);
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for(int i = 0; i < ricsubscription_ie->ricAction_ToBeSetup_List.list.size; i++){
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ricsubscription_ie->ricAction_ToBeSetup_List.list.array[i] = 0;
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}
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if (ricsubscription_ie->ricAction_ToBeSetup_List.list.size > 0){
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free(ricsubscription_ie->ricAction_ToBeSetup_List.list.array);
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ricsubscription_ie->ricAction_ToBeSetup_List.list.size = 0;
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ricsubscription_ie->ricAction_ToBeSetup_List.list.count = 0;
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ricsubscription_ie->ricAction_ToBeSetup_List.list.array = 0;
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}
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// clear subsequent action array
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for (unsigned int i = 0; i < action_array_size; i++){
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free(action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction );
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}
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free(action_array);
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RICsubscriptionRequest_t * subscription_request = &(initMsg->value.choice.RICsubscriptionRequest);
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for(int i = 0; i < subscription_request->protocolIEs.list.size; i++){
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subscription_request->protocolIEs.list.array[i] = 0;
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}
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if( subscription_request->protocolIEs.list.size > 0){
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free( subscription_request->protocolIEs.list.array);
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subscription_request->protocolIEs.list.array = 0;
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subscription_request->protocolIEs.list.size = 0;
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subscription_request->protocolIEs.list.count = 0;
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}
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free(IE_array);
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free(initMsg);
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e2ap_pdu_obj->choice.initiatingMessage = 0;
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ASN_STRUCT_FREE(asn_DEF_E2AP_PDU, e2ap_pdu_obj);
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mdclog_write(MDCLOG_DEBUG, "Freed subscription request memory ");
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};
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bool subscription_request::encode_e2ap_subscription(unsigned char *buf, size_t *size, subscription_helper &dinput){
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bool res;
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initMsg->procedureCode = ProcedureCode_id_RICsubscription;
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initMsg->criticality = Criticality_ignore;
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initMsg->value.present = InitiatingMessage__value_PR_RICsubscriptionRequest;
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res = set_fields(initMsg, dinput);
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if (!res){
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return false;
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}
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int ret_constr = asn_check_constraints(&asn_DEF_E2AP_PDU, (void *) e2ap_pdu_obj, errbuf, &errbuf_len);
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if(ret_constr){
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error_string.assign(errbuf, errbuf_len);
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error_string = "Constraints failed for encoding subscription request. Reason = " + error_string;
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return false;
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}
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//xer_fprint(stdout, &asn_DEF_E2AP_PDU, e2ap_pdu_obj);
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asn_enc_rval_t retval = asn_encode_to_buffer(0, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, e2ap_pdu_obj, buf, *size);
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if(retval.encoded == -1){
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error_string.assign(strerror(errno));
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error_string = "Error encoding Subscription Request. Reason = " + error_string;
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return false;
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}
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else {
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if(*size < retval.encoded){
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std::stringstream ss;
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ss <<"Error encoding Subscription Request . Reason = encoded pdu size " << retval.encoded << " exceeds buffer size " << *size << std::endl;
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error_string = ss.str();
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retval.encoded = -1;
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return false;
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}
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}
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*size = retval.encoded;
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return true;
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}
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bool subscription_request::set_fields( InitiatingMessage_t * init_msg, subscription_helper &helper){
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int ie_index;
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int result = 0;
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if (init_msg == 0){
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error_string = "Error. Invalid reference when getting fields from subscription request";
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return false;
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}
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RICsubscriptionRequest_t * ric_subscription = &(init_msg->value.choice.RICsubscriptionRequest);
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ric_subscription->protocolIEs.list.count = 0;
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ie_index = 0;
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RICsubscriptionRequest_IEs_t *ies_ricreq = &IE_array[ie_index];
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ies_ricreq->criticality = Criticality_reject;
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ies_ricreq->id = ProtocolIE_ID_id_RICrequestID;
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ies_ricreq->value.present = RICsubscriptionRequest_IEs__value_PR_RICrequestID;
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RICrequestID_t *ricrequest_ie = &ies_ricreq->value.choice.RICrequestID;
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ricrequest_ie->ricRequestorID = helper.get_request_id();
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//ricrequest_ie->ricRequestSequenceNumber = helper.get_req_seq();
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result = ASN_SEQUENCE_ADD(&(ric_subscription->protocolIEs), &IE_array[ie_index]);
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assert(result == 0);
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ie_index = 1;
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RICsubscriptionRequest_IEs_t *ies_ranfunc = &IE_array[ie_index];
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ies_ranfunc->criticality = Criticality_reject;
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ies_ranfunc->id = ProtocolIE_ID_id_RANfunctionID;
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ies_ranfunc->value.present = RICsubscriptionRequest_IEs__value_PR_RANfunctionID;
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RANfunctionID_t *ranfunction_ie = &ies_ranfunc->value.choice.RANfunctionID;
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*ranfunction_ie = helper.get_function_id();
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result = ASN_SEQUENCE_ADD(&(ric_subscription->protocolIEs), &IE_array[ie_index]);
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assert(result == 0);
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ie_index = 2;
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RICsubscriptionRequest_IEs_t *ies_actid = &IE_array[ie_index];
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ies_actid->criticality = Criticality_reject;
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ies_actid->id = ProtocolIE_ID_id_RICsubscriptionDetails;
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ies_actid->value.present = RICsubscriptionRequest_IEs__value_PR_RICsubscriptionDetails;
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RICsubscriptionDetails_t *ricsubscription_ie = &ies_actid->value.choice.RICsubscriptionDetails;
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ricsubscription_ie->ricEventTriggerDefinition.buf = (uint8_t *) helper.get_event_def();
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ricsubscription_ie->ricEventTriggerDefinition.size = helper.get_event_def_size();
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std::vector<Action> * ref_action_array = helper.get_list();
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// do we need to resize ?
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// we don't care about contents, so just do a free/calloc
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if(action_array_size < ref_action_array->size()){
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std::cout <<"re-allocating action array from " << action_array_size << " to " << 2 * ref_action_array->size() << std::endl;
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// free subsequent allocation
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for (unsigned int i = 0; i < action_array_size; i++){
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free(action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction );
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}
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action_array_size = 2 * ref_action_array->size();
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free(action_array);
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action_array = (RICaction_ToBeSetup_ItemIEs_t *)calloc(action_array_size, sizeof(RICaction_ToBeSetup_ItemIEs_t));
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assert(action_array != 0);
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// also need to add subsequent action and time to wait ..
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for (unsigned int i = 0; i < action_array_size; i++){
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action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction = (struct RICsubsequentAction *)calloc(1, sizeof(struct RICsubsequentAction));
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assert(action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction != 0);
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}
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}
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// reset the list count on ricAction_ToBeSetup_List;
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ricsubscription_ie->ricAction_ToBeSetup_List.list.count = 0;
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for(unsigned int i = 0; i < ref_action_array->size(); i ++){
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action_array[i].criticality = Criticality_ignore;
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action_array[i].id = ProtocolIE_ID_id_RICaction_ToBeSetup_Item ;
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action_array[i].value.present = RICaction_ToBeSetup_ItemIEs__value_PR_RICaction_ToBeSetup_Item;
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action_array[i].value.choice.RICaction_ToBeSetup_Item.ricActionID = (*ref_action_array)[i].get_id();
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action_array[i].value.choice.RICaction_ToBeSetup_Item.ricActionType = (*ref_action_array)[i].get_type();
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action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction->ricSubsequentActionType = (*ref_action_array)[i].get_subsequent_action();
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result = ASN_SEQUENCE_ADD(&ricsubscription_ie->ricAction_ToBeSetup_List, &(action_array[i]));
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if (result == -1){
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error_string = "Erorr : Unable to assign memory to add Action item to set up list";
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return false;
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}
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}
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result = ASN_SEQUENCE_ADD(&(ric_subscription->protocolIEs), &IE_array[ie_index]);
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assert(result == 0);
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return true;
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};
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bool subscription_request:: get_fields(InitiatingMessage_t * init_msg, subscription_helper & dout)
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{
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if (init_msg == 0){
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error_string = "Error. Invalid reference when getting fields from subscription request";
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return false;
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}
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RICrequestID_t *requestid;
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RANfunctionID_t * ranfunctionid;
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RICsubscriptionDetails_t * ricsubscription;
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for(int edx = 0; edx < init_msg->value.choice.RICsubscriptionRequest.protocolIEs.list.count; edx++) {
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RICsubscriptionRequest_IEs_t *memb_ptr = init_msg->value.choice.RICsubscriptionRequest.protocolIEs.list.array[edx];
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switch(memb_ptr->id)
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{
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case (ProtocolIE_ID_id_RICrequestID):
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requestid = &memb_ptr->value.choice.RICrequestID;
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//dout.set_request(requestid->ricRequestorID, requestid->ricRequestSequenceNumber);
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break;
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case (ProtocolIE_ID_id_RANfunctionID):
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ranfunctionid = &memb_ptr->value.choice.RANfunctionID;
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dout.set_function_id(*ranfunctionid);
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break;
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case (ProtocolIE_ID_id_RICsubscriptionDetails):
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ricsubscription = &memb_ptr->value.choice.RICsubscriptionDetails;
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dout.set_event_def(ricsubscription->ricEventTriggerDefinition.buf, ricsubscription->ricEventTriggerDefinition.size);
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for(int index = 0; index < ricsubscription->ricAction_ToBeSetup_List.list.count; index ++){
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RICaction_ToBeSetup_ItemIEs_t * item = (RICaction_ToBeSetup_ItemIEs_t *)ricsubscription->ricAction_ToBeSetup_List.list.array[index];
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if (item->value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction == NULL){
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dout.add_action(item->value.choice.RICaction_ToBeSetup_Item.ricActionID, item->value.choice.RICaction_ToBeSetup_Item.ricActionType);
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}
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else{
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std::string action_def = ""; // for now we are ignoring action definition
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}
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};
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break;
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}
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}
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//asn_fprint(stdout, &asn_DEF_E2AP_PDU, e2pdu);
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return true;
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};
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