X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=Bouncer%2Fsrc%2Fxapp-asn%2Fe2ap%2Fsubscription_request.cc;fp=Bouncer%2Fsrc%2Fxapp-asn%2Fe2ap%2Fsubscription_request.cc;h=91071b3c857c4fc6cc8c0e2fd29a5d3efae0e1cd;hb=ff20129c8f517cca6e0b4de6544ff64aebe7c171;hp=0000000000000000000000000000000000000000;hpb=35882dccfbc1b35af0e5704e14e0ecb9eba0f52a;p=ric-app%2Fbouncer.git diff --git a/Bouncer/src/xapp-asn/e2ap/subscription_request.cc b/Bouncer/src/xapp-asn/e2ap/subscription_request.cc new file mode 100644 index 0000000..91071b3 --- /dev/null +++ b/Bouncer/src/xapp-asn/e2ap/subscription_request.cc @@ -0,0 +1,306 @@ + + +/* +================================================================================== + Copyright (c) 2019-2020 AT&T Intellectual Property. + + 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 "subscription_request.hpp" + + +// Set up memory allocations for each IE for encoding +// We are responsible for memory management for each IE for encoding +// Hence destructor should clear out memory +// When decoding, we rely on asn1c macro (ASN_STRUCT_FREE to be called +// for releasing memory by external calling function) +subscription_request::subscription_request(void){ + + _name = "default"; + + e2ap_pdu_obj = 0; + e2ap_pdu_obj = (E2AP_PDU_t * )calloc(1, sizeof(E2AP_PDU_t)); + assert(e2ap_pdu_obj != 0); + + initMsg = 0; + initMsg = (InitiatingMessage_t * )calloc(1, sizeof(InitiatingMessage_t)); + assert(initMsg != 0); + + IE_array = 0; + IE_array = (RICsubscriptionRequest_IEs_t *)calloc(NUM_SUBSCRIPTION_REQUEST_IES, sizeof(RICsubscriptionRequest_IEs_t)); + assert(IE_array != 0); + + action_array = 0; + action_array = (RICaction_ToBeSetup_ItemIEs_t *)calloc(INITIAL_REQUEST_LIST_SIZE, sizeof(RICaction_ToBeSetup_ItemIEs_t)); + assert(action_array != 0); + action_array_size = INITIAL_REQUEST_LIST_SIZE; + // also need to add subsequent action and time to wait .. + for (unsigned int i = 0; i < action_array_size; i++){ + action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction = (struct RICsubsequentAction *)calloc(1, sizeof(struct RICsubsequentAction)); + assert(action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction != 0); + } + + e2ap_pdu_obj->choice.initiatingMessage = initMsg; + e2ap_pdu_obj->present = E2AP_PDU_PR_initiatingMessage; + + + +}; + + + +// Clear assigned protocolIE list from RIC indication IE container +subscription_request::~subscription_request(void){ + + mdclog_write(MDCLOG_DEBUG, "Freeing subscription request memory");; + + // Sequence of actions to be admitted causes special heart-ache. Free ric subscription element manually and reset the ie pointer + RICsubscriptionDetails_t * ricsubscription_ie = &(IE_array[2].value.choice.RICsubscriptionDetails); + + for(int i = 0; i < ricsubscription_ie->ricAction_ToBeSetup_List.list.size; i++){ + ricsubscription_ie->ricAction_ToBeSetup_List.list.array[i] = 0; + } + + if (ricsubscription_ie->ricAction_ToBeSetup_List.list.size > 0){ + free(ricsubscription_ie->ricAction_ToBeSetup_List.list.array); + ricsubscription_ie->ricAction_ToBeSetup_List.list.size = 0; + ricsubscription_ie->ricAction_ToBeSetup_List.list.count = 0; + ricsubscription_ie->ricAction_ToBeSetup_List.list.array = 0; + } + + // clear subsequent action array + for (unsigned int i = 0; i < action_array_size; i++){ + free(action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction ); + } + + free(action_array); + RICsubscriptionRequest_t * subscription_request = &(initMsg->value.choice.RICsubscriptionRequest); + + for(int i = 0; i < subscription_request->protocolIEs.list.size; i++){ + subscription_request->protocolIEs.list.array[i] = 0; + } + + if( subscription_request->protocolIEs.list.size > 0){ + free( subscription_request->protocolIEs.list.array); + subscription_request->protocolIEs.list.array = 0; + subscription_request->protocolIEs.list.size = 0; + subscription_request->protocolIEs.list.count = 0; + } + + free(IE_array); + free(initMsg); + e2ap_pdu_obj->choice.initiatingMessage = 0; + + ASN_STRUCT_FREE(asn_DEF_E2AP_PDU, e2ap_pdu_obj); + mdclog_write(MDCLOG_DEBUG, "Freed subscription request memory "); +}; + + +bool subscription_request::encode_e2ap_subscription(unsigned char *buf, size_t *size, subscription_helper &dinput){ + + bool res; + + initMsg->procedureCode = ProcedureCode_id_RICsubscription; + initMsg->criticality = Criticality_ignore; + initMsg->value.present = InitiatingMessage__value_PR_RICsubscriptionRequest; + + res = set_fields(initMsg, dinput); + if (!res){ + return false; + } + + int ret_constr = asn_check_constraints(&asn_DEF_E2AP_PDU, (void *) e2ap_pdu_obj, errbuf, &errbuf_len); + if(ret_constr){ + error_string.assign(errbuf, errbuf_len); + error_string = "Constraints failed for encoding subscription request. Reason = " + error_string; + return false; + } + + //xer_fprint(stdout, &asn_DEF_E2AP_PDU, e2ap_pdu_obj); + + asn_enc_rval_t retval = asn_encode_to_buffer(0, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2AP_PDU, e2ap_pdu_obj, buf, *size); + + if(retval.encoded == -1){ + error_string.assign(strerror(errno)); + error_string = "Error encoding Subscription Request. Reason = " + error_string; + return false; + } + else { + if(*size < retval.encoded){ + std::stringstream ss; + ss <<"Error encoding Subscription Request . Reason = encoded pdu size " << retval.encoded << " exceeds buffer size " << *size << std::endl; + error_string = ss.str(); + retval.encoded = -1; + return false; + } + } + + *size = retval.encoded; + return true; + +} + + +bool subscription_request::set_fields( InitiatingMessage_t * init_msg, subscription_helper &helper){ + + + int ie_index; + int result = 0; + + if (init_msg == 0){ + error_string = "Error. Invalid reference when getting fields from subscription request"; + return false; + } + + RICsubscriptionRequest_t * ric_subscription = &(init_msg->value.choice.RICsubscriptionRequest); + ric_subscription->protocolIEs.list.count = 0; + + ie_index = 0; + RICsubscriptionRequest_IEs_t *ies_ricreq = &IE_array[ie_index]; + ies_ricreq->criticality = Criticality_reject; + ies_ricreq->id = ProtocolIE_ID_id_RICrequestID; + ies_ricreq->value.present = RICsubscriptionRequest_IEs__value_PR_RICrequestID; + RICrequestID_t *ricrequest_ie = &ies_ricreq->value.choice.RICrequestID; + ricrequest_ie->ricRequestorID = helper.get_request_id(); + //ricrequest_ie->ricRequestSequenceNumber = helper.get_req_seq(); + result = ASN_SEQUENCE_ADD(&(ric_subscription->protocolIEs), &IE_array[ie_index]); + assert(result == 0); + + ie_index = 1; + RICsubscriptionRequest_IEs_t *ies_ranfunc = &IE_array[ie_index]; + ies_ranfunc->criticality = Criticality_reject; + ies_ranfunc->id = ProtocolIE_ID_id_RANfunctionID; + ies_ranfunc->value.present = RICsubscriptionRequest_IEs__value_PR_RANfunctionID; + RANfunctionID_t *ranfunction_ie = &ies_ranfunc->value.choice.RANfunctionID; + *ranfunction_ie = helper.get_function_id(); + result = ASN_SEQUENCE_ADD(&(ric_subscription->protocolIEs), &IE_array[ie_index]); + assert(result == 0); + + + ie_index = 2; + RICsubscriptionRequest_IEs_t *ies_actid = &IE_array[ie_index]; + ies_actid->criticality = Criticality_reject; + ies_actid->id = ProtocolIE_ID_id_RICsubscriptionDetails; + ies_actid->value.present = RICsubscriptionRequest_IEs__value_PR_RICsubscriptionDetails; + RICsubscriptionDetails_t *ricsubscription_ie = &ies_actid->value.choice.RICsubscriptionDetails; + + ricsubscription_ie->ricEventTriggerDefinition.buf = (uint8_t *) helper.get_event_def(); + ricsubscription_ie->ricEventTriggerDefinition.size = helper.get_event_def_size(); + + std::vector * ref_action_array = helper.get_list(); + // do we need to resize ? + // we don't care about contents, so just do a free/calloc + if(action_array_size < ref_action_array->size()){ + std::cout <<"re-allocating action array from " << action_array_size << " to " << 2 * ref_action_array->size() << std::endl; + // free subsequent allocation + for (unsigned int i = 0; i < action_array_size; i++){ + free(action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction ); + } + + action_array_size = 2 * ref_action_array->size(); + free(action_array); + action_array = (RICaction_ToBeSetup_ItemIEs_t *)calloc(action_array_size, sizeof(RICaction_ToBeSetup_ItemIEs_t)); + assert(action_array != 0); + + // also need to add subsequent action and time to wait .. + for (unsigned int i = 0; i < action_array_size; i++){ + action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction = (struct RICsubsequentAction *)calloc(1, sizeof(struct RICsubsequentAction)); + assert(action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction != 0); + } + + } + + // reset the list count on ricAction_ToBeSetup_List; + ricsubscription_ie->ricAction_ToBeSetup_List.list.count = 0; + + for(unsigned int i = 0; i < ref_action_array->size(); i ++){ + action_array[i].criticality = Criticality_ignore; + action_array[i].id = ProtocolIE_ID_id_RICaction_ToBeSetup_Item ; + action_array[i].value.present = RICaction_ToBeSetup_ItemIEs__value_PR_RICaction_ToBeSetup_Item; + action_array[i].value.choice.RICaction_ToBeSetup_Item.ricActionID = (*ref_action_array)[i].get_id(); + action_array[i].value.choice.RICaction_ToBeSetup_Item.ricActionType = (*ref_action_array)[i].get_type(); + action_array[i].value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction->ricSubsequentActionType = (*ref_action_array)[i].get_subsequent_action(); + + result = ASN_SEQUENCE_ADD(&ricsubscription_ie->ricAction_ToBeSetup_List, &(action_array[i])); + if (result == -1){ + error_string = "Erorr : Unable to assign memory to add Action item to set up list"; + return false; + } + + } + + result = ASN_SEQUENCE_ADD(&(ric_subscription->protocolIEs), &IE_array[ie_index]); + assert(result == 0); + + + + return true; +}; + + + +bool subscription_request:: get_fields(InitiatingMessage_t * init_msg, subscription_helper & dout) +{ + + if (init_msg == 0){ + error_string = "Error. Invalid reference when getting fields from subscription request"; + return false; + } + + RICrequestID_t *requestid; + RANfunctionID_t * ranfunctionid; + RICsubscriptionDetails_t * ricsubscription; + + for(int edx = 0; edx < init_msg->value.choice.RICsubscriptionRequest.protocolIEs.list.count; edx++) { + RICsubscriptionRequest_IEs_t *memb_ptr = init_msg->value.choice.RICsubscriptionRequest.protocolIEs.list.array[edx]; + + switch(memb_ptr->id) + { + case (ProtocolIE_ID_id_RICrequestID): + requestid = &memb_ptr->value.choice.RICrequestID; + //dout.set_request(requestid->ricRequestorID, requestid->ricRequestSequenceNumber); + break; + + case (ProtocolIE_ID_id_RANfunctionID): + ranfunctionid = &memb_ptr->value.choice.RANfunctionID; + dout.set_function_id(*ranfunctionid); + break; + + case (ProtocolIE_ID_id_RICsubscriptionDetails): + ricsubscription = &memb_ptr->value.choice.RICsubscriptionDetails; + dout.set_event_def(ricsubscription->ricEventTriggerDefinition.buf, ricsubscription->ricEventTriggerDefinition.size); + + for(int index = 0; index < ricsubscription->ricAction_ToBeSetup_List.list.count; index ++){ + RICaction_ToBeSetup_ItemIEs_t * item = (RICaction_ToBeSetup_ItemIEs_t *)ricsubscription->ricAction_ToBeSetup_List.list.array[index]; + if (item->value.choice.RICaction_ToBeSetup_Item.ricSubsequentAction == NULL){ + dout.add_action(item->value.choice.RICaction_ToBeSetup_Item.ricActionID, item->value.choice.RICaction_ToBeSetup_Item.ricActionType); + } + else{ + std::string action_def = ""; // for now we are ignoring action definition + } + }; + + break; + } + + } + + //asn_fprint(stdout, &asn_DEF_E2AP_PDU, e2pdu); + return true; +}; + + +