X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=Bouncer%2Fsrc%2Fxapp-formats%2Fe2sm%2Fe2sm.cc;fp=Bouncer%2Fsrc%2Fxapp-formats%2Fe2sm%2Fe2sm.cc;h=c476c83105502e6433cc46a3a1b07a0bfb7e24e0;hb=ff20129c8f517cca6e0b4de6544ff64aebe7c171;hp=0000000000000000000000000000000000000000;hpb=35882dccfbc1b35af0e5704e14e0ecb9eba0f52a;p=ric-app%2Fbouncer.git diff --git a/Bouncer/src/xapp-formats/e2sm/e2sm.cc b/Bouncer/src/xapp-formats/e2sm/e2sm.cc new file mode 100644 index 0000000..c476c83 --- /dev/null +++ b/Bouncer/src/xapp-formats/e2sm/e2sm.cc @@ -0,0 +1,660 @@ +/* + ================================================================================== + + Copyright (c) 2018-2019 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, softwares + 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. + ================================================================================== +*/ + +/* Classes to handle E2 service model based on e2sm-gNB-X2-release-1-v040.asn */ + +#include "e2sm.hpp" + + + + //initialize + e2sm_event_trigger::e2sm_event_trigger(void){ + + memset(&gNodeB_ID, 0, sizeof(E2N_GlobalGNB_ID_t)); + + event_trigger = 0; + event_trigger = ( E2N_E2SM_gNB_X2_eventTriggerDefinition_t *)calloc(1, sizeof( E2N_E2SM_gNB_X2_eventTriggerDefinition_t)); + assert(event_trigger != 0); + + // allocate space for gNodeB id (used for encoding) + gNodeB_ID.gNB_ID.choice.gNB_ID.buf = 0; + gNodeB_ID.gNB_ID.choice.gNB_ID.buf = (uint8_t *)calloc(4, sizeof(uint8_t)); + assert(gNodeB_ID.gNB_ID.choice.gNB_ID.buf != 0); + + // allocate space for plmn identity (used for encoding) + gNodeB_ID.pLMN_Identity.buf = 0; + gNodeB_ID.pLMN_Identity.buf = (uint8_t *) calloc(4, sizeof(uint8_t)); + assert(gNodeB_ID.pLMN_Identity.buf != 0); + + ie_list = 0; + ie_list = ( struct E2N_InterfaceProtocolIE_Item *) calloc(INITIAL_LIST_SIZE, sizeof( struct E2N_InterfaceProtocolIE_Item)); + assert(ie_list != 0); + ie_list_size = INITIAL_LIST_SIZE; + + condition_list = 0; + condition_list = (E2N_E2SM_gNB_X2_eventTriggerDefinition::E2N_E2SM_gNB_X2_eventTriggerDefinition__interfaceProtocolIE_List *) calloc(1, sizeof(E2N_E2SM_gNB_X2_eventTriggerDefinition::E2N_E2SM_gNB_X2_eventTriggerDefinition__interfaceProtocolIE_List )); + assert(condition_list != 0); + + + + }; + +e2sm_event_trigger::~e2sm_event_trigger(void){ + + mdclog_write(MDCLOG_DEBUG, "Freeing event trigger object memory"); + for(int i = 0; i < condition_list->list.size; i++){ + condition_list->list.array[i] = 0; + } + + if (condition_list->list.size > 0){ + free(condition_list->list.array); + condition_list->list.array = 0; + condition_list->list.size = 0; + condition_list->list.count = 0; + } + + free(condition_list); + condition_list = 0; + + free(gNodeB_ID.gNB_ID.choice.gNB_ID.buf); + gNodeB_ID.gNB_ID.choice.gNB_ID.buf = 0; + + free(gNodeB_ID.pLMN_Identity.buf); + gNodeB_ID.pLMN_Identity.buf = 0; + + free(ie_list); + ie_list = 0; + + event_trigger->interface_ID.choice.global_gNB_ID = 0; + event_trigger->interfaceProtocolIE_List = 0; + + ASN_STRUCT_FREE(asn_DEF_E2N_E2SM_gNB_X2_eventTriggerDefinition, event_trigger); + mdclog_write(MDCLOG_DEBUG, "Freed event trigger object memory"); + + +}; + +bool e2sm_event_trigger::encode_event_trigger(unsigned char *buf, size_t *size, e2sm_event_trigger_helper &helper){ + + bool res; + res = set_fields(event_trigger, helper); + if (!res){ + return false; + } + + int ret_constr = asn_check_constraints(&asn_DEF_E2N_E2SM_gNB_X2_eventTriggerDefinition, event_trigger, errbuf, &errbuf_len); + if(ret_constr){ + error_string.assign(&errbuf[0], errbuf_len); + return false; + } + + //xer_fprint(stdout, &asn_DEF_E2N_E2SM_gNB_X2_eventTriggerDefinition, event_trigger); + + asn_enc_rval_t retval = asn_encode_to_buffer(0, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2N_E2SM_gNB_X2_eventTriggerDefinition, event_trigger, buf, *size); + + if(retval.encoded == -1){ + error_string.assign(strerror(errno)); + return false; + } + else if (retval.encoded > *size){ + std::stringstream ss; + ss <<"Error encoding event trigger definition. Reason = encoded pdu size " << retval.encoded << " exceeds buffer size " << *size << std::endl; + error_string = ss.str(); + return false; + } + else{ + *size = retval.encoded; + } + + return true; +} + + +bool e2sm_event_trigger::set_fields(E2N_E2SM_gNB_X2_eventTriggerDefinition_t * ref_event_trigger, e2sm_event_trigger_helper & helper){ + if(ref_event_trigger == 0){ + error_string = "Invalid reference for Event Trigger Definition set fields"; + return false; + } + + // set the message type + ref_event_trigger->interfaceMessageType.procedureCode = helper.procedure_code; + ref_event_trigger->interfaceMessageType.typeOfMessage = helper.message_type; + + ref_event_trigger->interfaceDirection = helper.interface_direction; + ref_event_trigger->interface_ID.present = E2N_Interface_ID_PR_global_gNB_ID; + + ref_event_trigger->interface_ID.choice.global_gNB_ID = &gNodeB_ID; + + // to do : need to put correct code here for upding plmn id and gNodeB + // for now just place holders : + //================================================================ + memcpy(gNodeB_ID.pLMN_Identity.buf, helper.plmn_id.c_str(), 3); + gNodeB_ID.pLMN_Identity.size = 3; + + memcpy(gNodeB_ID.gNB_ID.choice.gNB_ID.buf, helper.egNB_id.c_str(), 3); + gNodeB_ID.gNB_ID.choice.gNB_ID.size = 3; + + // we only do global gNodeB id for now, not eNodeB + gNodeB_ID.gNB_ID.present = E2N_GNB_ID_PR_gNB_ID; + //================================================================ + + + // Add in any requested IE items + std::vector * ref_ie_array = helper.get_list(); + + if (ref_ie_array->size() == 0){ + ref_event_trigger->interfaceProtocolIE_List = 0; + + } + else{ + ref_event_trigger->interfaceProtocolIE_List = condition_list; + + //resize memory ? + if(ref_ie_array->size() > ie_list_size){ + ie_list_size = 2 * ref_ie_array->size(); + free(ie_list); + ie_list = (struct E2N_InterfaceProtocolIE_Item *)calloc(ie_list_size, sizeof(struct E2N_InterfaceProtocolIE_Item)); + assert(ie_list != 0); + } + + // reset the count so that adds start from the beginning + ref_event_trigger->interfaceProtocolIE_List->list.count = 0; + + for(unsigned int i = 0; i < ref_ie_array->size(); i++){ + + ie_list[i].interfaceProtocolIE_ID = (*ref_ie_array)[i].interface_id; + ie_list[i].interfaceProtocolIE_Test = (*ref_ie_array)[i].test; + + //switch(ie_list[i].interfaceProtocolIE_Value.present){ + switch((*ref_ie_array)[i].val_type){ + + case (E2N_InterfaceProtocolIE_Value_PR_valueInt): + ie_list[i].interfaceProtocolIE_Value.present = E2N_InterfaceProtocolIE_Value_PR_valueInt; + ie_list[i].interfaceProtocolIE_Value.choice.valueInt = (*ref_ie_array)[i].value_n; + break; + + case (E2N_InterfaceProtocolIE_Value_PR_valueEnum): + ie_list[i].interfaceProtocolIE_Value.present = E2N_InterfaceProtocolIE_Value_PR_valueEnum; + ie_list[i].interfaceProtocolIE_Value.choice.valueEnum = (*ref_ie_array)[i].value_n; + break; + + case (E2N_InterfaceProtocolIE_Value_PR_valueBool): + ie_list[i].interfaceProtocolIE_Value.present = E2N_InterfaceProtocolIE_Value_PR_valueBool; + ie_list[i].interfaceProtocolIE_Value.choice.valueBool = (*ref_ie_array)[i].value_n; + break; + + case (E2N_InterfaceProtocolIE_Value_PR_valueBitS): + ie_list[i].interfaceProtocolIE_Value.present = E2N_InterfaceProtocolIE_Value_PR_valueBitS; + ie_list[i].interfaceProtocolIE_Value.choice.valueBitS.buf = (uint8_t *)(*ref_ie_array)[i].value_s.c_str(); + ie_list[i].interfaceProtocolIE_Value.choice.valueBitS.size = (*ref_ie_array)[i].value_s.length(); + break; + + case (E2N_InterfaceProtocolIE_Value_PR_valueOctS): + ie_list[i].interfaceProtocolIE_Value.present = E2N_InterfaceProtocolIE_Value_PR_valueOctS; + ie_list[i].interfaceProtocolIE_Value.choice.valueOctS.buf = (uint8_t *)(*ref_ie_array)[i].value_s.c_str(); + ie_list[i].interfaceProtocolIE_Value.choice.valueOctS.size = (*ref_ie_array)[i].value_s.length(); + break; + + default: + { + std::stringstream ss; + ss <<"Error ! " << __FILE__ << "," << __LINE__ << " illegal enum " << (*ref_ie_array)[i].val_type << " for interface Protocol IE value" << std::endl; + std::string error_string = ss.str(); + return false; + } + } + + ASN_SEQUENCE_ADD(ref_event_trigger->interfaceProtocolIE_List, &ie_list[i]); + } + } + + return true; +}; + + +bool e2sm_event_trigger::get_fields(E2N_E2SM_gNB_X2_eventTriggerDefinition_t * ref_event_trigger, e2sm_event_trigger_helper & helper){ + + if (ref_event_trigger == 0){ + error_string = "Invalid reference for Event Trigger definition get fields"; + return false; + } + + helper.procedure_code = ref_event_trigger->interfaceMessageType.procedureCode; + helper.message_type = ref_event_trigger->interfaceMessageType.typeOfMessage; + helper.interface_direction = ref_event_trigger->interfaceDirection; + + helper.plmn_id.assign((const char *)ref_event_trigger->interface_ID.choice.global_gNB_ID->pLMN_Identity.buf, ref_event_trigger->interface_ID.choice.global_gNB_ID->pLMN_Identity.size); + helper.egNB_id.assign((const char *)ref_event_trigger->interface_ID.choice.global_gNB_ID->gNB_ID.choice.gNB_ID.buf, ref_event_trigger->interface_ID.choice.global_gNB_ID->gNB_ID.choice.gNB_ID.size); + for(int i = 0; i < ref_event_trigger->interfaceProtocolIE_List->list.count; i++){ + struct E2N_InterfaceProtocolIE_Item * ie_item = ref_event_trigger->interfaceProtocolIE_List->list.array[i]; + switch(ie_item->interfaceProtocolIE_Value.present){ + case (E2N_InterfaceProtocolIE_Value_PR_valueInt): + helper.add_protocol_ie_item(ie_item->interfaceProtocolIE_ID, ie_item->interfaceProtocolIE_Test, ie_item->interfaceProtocolIE_Value.present, ie_item->interfaceProtocolIE_Value.choice.valueInt); + break; + case (E2N_InterfaceProtocolIE_Value_PR_valueEnum): + helper.add_protocol_ie_item(ie_item->interfaceProtocolIE_ID, ie_item->interfaceProtocolIE_Test, ie_item->interfaceProtocolIE_Value.present, ie_item->interfaceProtocolIE_Value.choice.valueEnum); + break; + case (E2N_InterfaceProtocolIE_Value_PR_valueBool): + helper.add_protocol_ie_item(ie_item->interfaceProtocolIE_ID, ie_item->interfaceProtocolIE_Test, ie_item->interfaceProtocolIE_Value.present, ie_item->interfaceProtocolIE_Value.choice.valueBool); + break; + case (E2N_InterfaceProtocolIE_Value_PR_valueBitS): + helper.add_protocol_ie_item(ie_item->interfaceProtocolIE_ID, ie_item->interfaceProtocolIE_Test, ie_item->interfaceProtocolIE_Value.present, std::string((const char *)ie_item->interfaceProtocolIE_Value.choice.valueBitS.buf,ie_item->interfaceProtocolIE_Value.choice.valueBitS.size) ); + break; + case (E2N_InterfaceProtocolIE_Value_PR_valueOctS): + helper.add_protocol_ie_item(ie_item->interfaceProtocolIE_ID, ie_item->interfaceProtocolIE_Test, ie_item->interfaceProtocolIE_Value.present, std::string((const char *)ie_item->interfaceProtocolIE_Value.choice.valueOctS.buf,ie_item->interfaceProtocolIE_Value.choice.valueOctS.size) ); + break; + default: + mdclog_write(MDCLOG_ERR, "Error : %s, %d: Unkown interface protocol IE type %d in event trigger definition\n", __FILE__, __LINE__, ie_item->interfaceProtocolIE_Value.present); + return false; + } + } + + return true; +}; + + + + +// initialize +e2sm_indication::e2sm_indication(void) { + + memset(&gNodeB_ID, 0, sizeof(E2N_GlobalGNB_ID_t)); + + // allocate space for gNodeB id (used for encoding) + gNodeB_ID.gNB_ID.choice.gNB_ID.buf = (uint8_t *)calloc(4, sizeof(uint8_t)); + assert(gNodeB_ID.gNB_ID.choice.gNB_ID.buf != 0); + + // allocate space for plmn identity (used for encoding) + gNodeB_ID.pLMN_Identity.buf = (uint8_t *) calloc(4, sizeof(uint8_t)); + assert(gNodeB_ID.pLMN_Identity.buf != 0); + + header = 0; + header = (E2N_E2SM_gNB_X2_indicationHeader_t *)calloc(1, sizeof(E2N_E2SM_gNB_X2_indicationHeader_t)); + assert(header != 0); + + message = 0; + message = (E2N_E2SM_gNB_X2_indicationMessage_t *)calloc(1, sizeof(E2N_E2SM_gNB_X2_indicationMessage_t)); + assert(message != 0); +} + +e2sm_indication::~e2sm_indication(void){ + mdclog_write(MDCLOG_DEBUG, "Freeing E2N_E2SM Indication object memory"); + + free(gNodeB_ID.gNB_ID.choice.gNB_ID.buf); + free(gNodeB_ID.pLMN_Identity.buf); + + header->interface_ID.choice.global_gNB_ID = 0; + + ASN_STRUCT_FREE(asn_DEF_E2N_E2SM_gNB_X2_indicationHeader, header); + + message->interfaceMessage.buf = 0; + message->interfaceMessage.size = 0; + + ASN_STRUCT_FREE(asn_DEF_E2N_E2SM_gNB_X2_indicationMessage, message); + mdclog_write(MDCLOG_DEBUG, "Freed E2SM Indication object memory"); + +} + + + +bool e2sm_indication::encode_indication_header(unsigned char *buf, size_t *size, e2sm_header_helper &helper){ + + bool res; + res = set_header_fields(header, helper); + if (!res){ + return false; + } + + int ret_constr = asn_check_constraints(&asn_DEF_E2N_E2SM_gNB_X2_indicationHeader, header, errbuf, &errbuf_len); + if(ret_constr){ + error_string.assign(&errbuf[0], errbuf_len); + error_string = "E2SM Indication Header Constraint failed : " + error_string; + + return false; + } + + asn_enc_rval_t retval = asn_encode_to_buffer(0, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2N_E2SM_gNB_X2_indicationHeader, header, buf, *size); + + if(retval.encoded == -1){ + error_string.assign(strerror(errno)); + error_string = "Error encoding E2N_E2SM Indication Header. Reason = " + error_string; + return false; + } + else if (retval.encoded > *size){ + std::stringstream ss; + ss <<"Error encoding E2SM Indication Header . Reason = encoded pdu size " << retval.encoded << " exceeds buffer size " << *size << std::endl; + error_string = ss.str(); + return false; + } + else{ + *size = retval.encoded; + } + + return true; +} + + +bool e2sm_indication::encode_indication_message(unsigned char *buf, size_t *size, e2sm_message_helper &helper){ + + set_message_fields(message, helper); + + int ret_constr = asn_check_constraints(&asn_DEF_E2N_E2SM_gNB_X2_indicationMessage, message, errbuf, &errbuf_len); + if(ret_constr){ + error_string.assign(&errbuf[0], errbuf_len); + error_string = "E2SM Indication Message Constraint failed : " + error_string; + return false; + } + + asn_enc_rval_t retval = asn_encode_to_buffer(0, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2N_E2SM_gNB_X2_indicationMessage, message, buf, *size); + if(retval.encoded == -1){ + error_string.assign(strerror(errno)); + error_string = "Error encoding E2SM Indication Header. Reason = " + error_string; + return false; + } + else if (retval.encoded > *size){ + std::stringstream ss; + ss <<"Error encoding E2N_E2SM Indication Message . Reason = encoded pdu size " << retval.encoded << " exceeds buffer size " << *size << std::endl; + error_string = ss.str(); + + return false; + } + else{ + *size = retval.encoded; + } + + return true; +} + + + +// Used when generating an indication header +bool e2sm_indication::set_header_fields(E2N_E2SM_gNB_X2_indicationHeader_t *header, e2sm_header_helper &helper){ + + if (header == 0){ + error_string = "Invalid reference for E2SM Indication Header set fields"; + return false; + } + + + header->interfaceDirection = helper.interface_direction; + header->interface_ID.present = E2N_Interface_ID_PR_global_gNB_ID; + header->interface_ID.choice.global_gNB_ID = &gNodeB_ID; + + + // to do : need to put correct code here for upding plmn id and gNodeB + // for now just place holders : + memcpy(gNodeB_ID.pLMN_Identity.buf, helper.plmn_id.c_str(), 3); + gNodeB_ID.pLMN_Identity.size = 3; + + memcpy(gNodeB_ID.gNB_ID.choice.gNB_ID.buf, helper.egNB_id.c_str(), 3); + gNodeB_ID.gNB_ID.choice.gNB_ID.size = 3; + + // we only do global gNodeB id for now, not eNodeB + gNodeB_ID.gNB_ID.present = E2N_GNB_ID_PR_gNB_ID; + + return true; + +}; + + +// used when decoding an indication header +bool e2sm_indication::get_header_fields(E2N_E2SM_gNB_X2_indicationHeader_t *header, e2sm_header_helper &helper){ + + if (header == 0){ + error_string = "Invalid reference for E2SM Indication header get fields"; + return false; + } + + helper.interface_direction = header->interfaceDirection; + helper.plmn_id.assign((const char *)header->interface_ID.choice.global_gNB_ID->pLMN_Identity.buf, header->interface_ID.choice.global_gNB_ID->pLMN_Identity.size); + helper.egNB_id.assign((const char *)header->interface_ID.choice.global_gNB_ID->gNB_ID.choice.gNB_ID.buf, header->interface_ID.choice.global_gNB_ID->gNB_ID.choice.gNB_ID.size); + + // to do : add code to decipher plmn and global gnodeb from ints (since that is likely the convention for packing) + + return true; +} + + + +// Used when generating an indication message +bool e2sm_indication::set_message_fields(E2N_E2SM_gNB_X2_indicationMessage_t *interface_message, e2sm_message_helper &helper){ + + if(interface_message == 0){ + error_string = "Invalid reference for E2SM Indication Message set fields"; + return false; + } + + // interface-message is an octet string. just point it to the buffer + interface_message->interfaceMessage.buf = &(helper.x2ap_pdu[0]); + interface_message->interfaceMessage.size = helper.x2ap_pdu_size; + + return true; + +}; + +// used when decoding an indication message +bool e2sm_indication::get_message_fields( E2N_E2SM_gNB_X2_indicationMessage_t *interface_message, e2sm_message_helper &helper){ + + + if(interface_message == 0){ + error_string = "Invalid reference for E2SM Indication Message get fields"; + return false; + } + + // interface message is an octet string + helper.x2ap_pdu = interface_message->interfaceMessage.buf;; + helper.x2ap_pdu_size = interface_message->interfaceMessage.size; + + return true; + +} + + + +// initialize +e2sm_control::e2sm_control(void) { + + memset(&gNodeB_ID, 0, sizeof(E2N_GlobalGNB_ID_t)); + + // allocate space for gNodeB id (used for encoding) + gNodeB_ID.gNB_ID.choice.gNB_ID.buf = (uint8_t *)calloc(4, sizeof(uint8_t)); + assert(gNodeB_ID.gNB_ID.choice.gNB_ID.buf != 0); + + // allocate space for plmn identity (used for encoding) + gNodeB_ID.pLMN_Identity.buf = (uint8_t *) calloc(4, sizeof(uint8_t)); + assert(gNodeB_ID.pLMN_Identity.buf != 0); + + header = 0; + header = (E2N_E2SM_gNB_X2_controlHeader_t *)calloc(1, sizeof(E2N_E2SM_gNB_X2_controlHeader_t)); + assert(header != 0); + + message = 0; + message = (E2N_E2SM_gNB_X2_controlMessage_t *)calloc(1, sizeof(E2N_E2SM_gNB_X2_controlMessage_t)); + assert(message != 0); +} + +e2sm_control::~e2sm_control(void){ + mdclog_write(MDCLOG_DEBUG, "Freeing E2SM Control object memory"); + + free(gNodeB_ID.gNB_ID.choice.gNB_ID.buf); + free(gNodeB_ID.pLMN_Identity.buf); + header->interface_ID.choice.global_gNB_ID = 0; + ASN_STRUCT_FREE(asn_DEF_E2N_E2SM_gNB_X2_controlHeader, header); + + message->interfaceMessage.buf = 0; + ASN_STRUCT_FREE(asn_DEF_E2N_E2SM_gNB_X2_controlMessage, message); + + mdclog_write(MDCLOG_DEBUG, "Freed E2SM Control object memory"); + +} + + + +bool e2sm_control::encode_control_header(unsigned char *buf, size_t *size, e2sm_header_helper &helper){ + + bool res; + res = set_header_fields(header, helper); + if (!res){ + return false; + } + + int ret_constr = asn_check_constraints(&asn_DEF_E2N_E2SM_gNB_X2_controlHeader, header, errbuf, &errbuf_len); + if(ret_constr){ + error_string.assign(&errbuf[0], errbuf_len); + error_string = "E2SM Control Header Constraint failed : " + error_string; + + return false; + } + + asn_enc_rval_t retval = asn_encode_to_buffer(0, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2N_E2SM_gNB_X2_controlHeader, header, buf, *size); + + if(retval.encoded == -1){ + error_string.assign(strerror(errno)); + error_string = "Error encoding E2SM Control Header. Reason = " + error_string; + return false; + } + else if (retval.encoded > *size){ + std::stringstream ss; + ss <<"Error encoding E2N_E2SM Control Header . Reason = encoded pdu size " << retval.encoded << " exceeds buffer size " << *size << std::endl; + error_string = ss.str(); + return false; + } + else{ + *size = retval.encoded; + } + + return true; +} + + +bool e2sm_control::encode_control_message(unsigned char *buf, size_t *size, e2sm_message_helper &helper){ + + set_message_fields(message, helper); + + int ret_constr = asn_check_constraints(&asn_DEF_E2N_E2SM_gNB_X2_controlMessage, message, errbuf, &errbuf_len); + if(ret_constr){ + error_string.assign(&errbuf[0], errbuf_len); + error_string = "E2SM Control Message Constraint failed : " + error_string; + return false; + } + + asn_enc_rval_t retval = asn_encode_to_buffer(0, ATS_ALIGNED_BASIC_PER, &asn_DEF_E2N_E2SM_gNB_X2_controlMessage, message, buf, *size); + if(retval.encoded == -1){ + error_string.assign(strerror(errno)); + error_string = "Error encoding E2SM Control Message. Reason = " + error_string; + return false; + } + else if (retval.encoded > *size){ + std::stringstream ss; + ss <<"Error encoding E2SM Control Message . Reason = encoded pdu size " << retval.encoded << " exceeds buffer size " << *size << std::endl; + error_string = ss.str(); + + return false; + } + else{ + *size = retval.encoded; + } + + return true; +} + + + +// Used when generating an indication header +bool e2sm_control::set_header_fields(E2N_E2SM_gNB_X2_controlHeader_t *header, e2sm_header_helper &helper){ + + if (header == 0){ + error_string = "Invalid reference for E2SM Control Header set fields"; + return false; + } + + + header->interfaceDirection = helper.interface_direction; + header->interface_ID.present = E2N_Interface_ID_PR_global_gNB_ID; + header->interface_ID.choice.global_gNB_ID = &gNodeB_ID; + + + // to do : need to put correct code here for upding plmn id and gNodeB + // for now just place holders : + memcpy(gNodeB_ID.pLMN_Identity.buf, helper.plmn_id.c_str(), 3); + gNodeB_ID.pLMN_Identity.size = 3; + + memcpy(gNodeB_ID.gNB_ID.choice.gNB_ID.buf, helper.egNB_id.c_str(), 3); + gNodeB_ID.gNB_ID.choice.gNB_ID.size = 3; + + // we only do global gNodeB id for now, not eNodeB + gNodeB_ID.gNB_ID.present = E2N_GNB_ID_PR_gNB_ID; + + return true; + +}; + + +// used when decoding an indication header +bool e2sm_control::get_header_fields(E2N_E2SM_gNB_X2_controlHeader_t *header, e2sm_header_helper &helper){ + + if (header == 0){ + error_string = "Invalid reference for E2SM Control header get fields"; + return false; + } + + helper.interface_direction = header->interfaceDirection; + helper.plmn_id.assign((const char *)header->interface_ID.choice.global_gNB_ID->pLMN_Identity.buf, header->interface_ID.choice.global_gNB_ID->pLMN_Identity.size); + helper.egNB_id.assign((const char *)header->interface_ID.choice.global_gNB_ID->gNB_ID.choice.gNB_ID.buf, header->interface_ID.choice.global_gNB_ID->gNB_ID.choice.gNB_ID.size); + + // to do : add code to decipher plmn and global gnodeb from ints (since that is likely the convention for packing) + + return true; +} + + + +// Used when generating an indication message +bool e2sm_control::set_message_fields(E2N_E2SM_gNB_X2_controlMessage_t *interface_message, e2sm_message_helper &helper){ + + if(interface_message == 0){ + error_string = "Invalid reference for E2SM Control Message set fields"; + return false; + } + + // interface-message is an octet string. just point it to the buffer + interface_message->interfaceMessage.buf = &(helper.x2ap_pdu[0]); + interface_message->interfaceMessage.size = helper.x2ap_pdu_size; + + return true; + +}; + +// used when decoding an indication message +bool e2sm_control::get_message_fields( E2N_E2SM_gNB_X2_controlMessage_t *interface_message, e2sm_message_helper &helper){ + + + if(interface_message == 0){ + error_string = "Invalid reference for E2SM Control Message get fields"; + return false; + } + + // interface message is an octet string + helper.x2ap_pdu = interface_message->interfaceMessage.buf;; + helper.x2ap_pdu_size = interface_message->interfaceMessage.size; + + return true; + +} +