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Add encoder for PDU Session Resource Setup Response Transfer IE in NGAP (Initial Context/PDU Session) Setup Response

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This commit is contained in:
Guido Casati
2025-06-18 10:52:15 +02:00
parent 248cf7f155
commit b5a717cc99
1 changed files with 50 additions and 67 deletions
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openair3/NGAP/ngap_gNB_nas_procedures.c
+50 -67
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@@ -35,6 +35,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include "BIT_STRING.h"
#include "INTEGER.h"
#include "ngap_msg_includes.h"
@@ -57,6 +58,7 @@
#include "oai_asn1.h"
#include "s1ap_messages_types.h"
#include "xer_encoder.h"
#include "ds/byte_array.h"
/** @brief Selects the AMF instance for a given UE based on identity information.
* It attempts to select an AMF using the following prioritized criteria:
@@ -537,6 +539,46 @@ int ngap_gNB_nas_non_delivery_ind(instance_t instance,
return 0;
}
/** @brief PDU Session Resource Setup Response Transfer encoding (9.3.4.2 3GPP TS 38.413) */
static byte_array_t encode_ngap_pdusession_setup_response_transfer(const pdusession_setup_t *pdusession)
{
NGAP_PDUSessionResourceSetupResponseTransfer_t pdusessionTransfer = {0};
byte_array_t out = {0};
// DL QoS Flow per TNL Information (Mandatory)
NGAP_QosFlowPerTNLInformation_t *dLQosFlowPerTNLInformation = &pdusessionTransfer.dLQosFlowPerTNLInformation;
// UP Transport Layer Information (Mandatory)
dLQosFlowPerTNLInformation->uPTransportLayerInformation.present = NGAP_UPTransportLayerInformation_PR_gTPTunnel;
asn1cCalloc(dLQosFlowPerTNLInformation->uPTransportLayerInformation.choice.gTPTunnel, gtp);
GTP_TEID_TO_ASN1(pdusession->n3_outgoing.teid, &gtp->gTP_TEID);
tnl_to_bitstring(&gtp->transportLayerAddress, pdusession->n3_outgoing.addr);
char ip_str[INET_ADDRSTRLEN] = {0};
inet_ntop(AF_INET, gtp->transportLayerAddress.buf, ip_str, sizeof(ip_str));
NGAP_DEBUG("Encoded PDU Session Transfer (%d): TEID=0x%08x, Addr=%s\n",
pdusession->pdusession_id,
pdusession->n3_outgoing.teid,
ip_str);
// Associated QoS Flow List (Mandatory)
for (int j = 0; j < pdusession->nb_of_qos_flow; j++) {
asn1cSequenceAdd(dLQosFlowPerTNLInformation->associatedQosFlowList.list, NGAP_AssociatedQosFlowItem_t, qos_item);
// QoS Flow Identifier (Mandatory)
qos_item->qosFlowIdentifier = pdusession->associated_qos_flows[j].qfi;
}
// Encode
asn_encode_to_new_buffer_result_t res = asn_encode_to_new_buffer(NULL,
ATS_ALIGNED_CANONICAL_PER,
&asn_DEF_NGAP_PDUSessionResourceSetupResponseTransfer,
&pdusessionTransfer);
AssertFatal(res.buffer, "ASN1 message encoding failed (%s, %lu)!\n", res.result.failed_type->name, res.result.encoded);
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_NGAP_PDUSessionResourceSetupResponseTransfer, &pdusessionTransfer);
out.buf = res.buffer;
out.len = res.result.encoded;
return out;
}
//------------------------------------------------------------------------------
int ngap_gNB_initial_ctxt_resp(instance_t instance, ngap_initial_context_setup_resp_t *initial_ctxt_resp_p)
//------------------------------------------------------------------------------
@@ -606,39 +648,10 @@ int ngap_gNB_initial_ctxt_resp(instance_t instance, ngap_initial_context_setup_r
asn1cSequenceAdd(ie->value.choice.PDUSessionResourceSetupListCxtRes.list, NGAP_PDUSessionResourceSetupItemCxtRes_t, item);
/* pDUSessionID */
item->pDUSessionID = initial_ctxt_resp_p->pdusessions[i].pdusession_id;
/* dLQosFlowPerTNLInformation */
NGAP_PDUSessionResourceSetupResponseTransfer_t pdusessionTransfer = {0};
pdusessionTransfer.dLQosFlowPerTNLInformation.uPTransportLayerInformation.present = NGAP_UPTransportLayerInformation_PR_gTPTunnel;
asn1cCalloc(pdusessionTransfer.dLQosFlowPerTNLInformation.uPTransportLayerInformation.choice.gTPTunnel, tmp);
GTP_TEID_TO_ASN1(initial_ctxt_resp_p->pdusessions[i].n3_outgoing.teid, &tmp->gTP_TEID);
tnl_to_bitstring(&tmp->transportLayerAddress, initial_ctxt_resp_p->pdusessions[i].n3_outgoing.addr);
NGAP_DEBUG("initial_ctxt_resp_p: pdusession ID %ld, gnb_addr %d.%d.%d.%d, SIZE %ld, TEID %u\n",
item->pDUSessionID,
tmp->transportLayerAddress.buf[0],
tmp->transportLayerAddress.buf[1],
tmp->transportLayerAddress.buf[2],
tmp->transportLayerAddress.buf[3],
tmp->transportLayerAddress.size,
initial_ctxt_resp_p->pdusessions[i].n3_outgoing.teid);
/* associatedQosFlowList. number of 1? */
for(int j=0; j < initial_ctxt_resp_p->pdusessions[i].nb_of_qos_flow; j++) {
asn1cSequenceAdd(pdusessionTransfer.dLQosFlowPerTNLInformation.associatedQosFlowList.list, NGAP_AssociatedQosFlowItem_t, ass_qos_item_p);
/* qosFlowIdentifier */
ass_qos_item_p->qosFlowIdentifier = initial_ctxt_resp_p->pdusessions[i].associated_qos_flows[j].qfi;
}
void *pdusessionTransfer_buffer;
ssize_t encoded = aper_encode_to_new_buffer(&asn_DEF_NGAP_PDUSessionResourceSetupResponseTransfer, NULL, &pdusessionTransfer, &pdusessionTransfer_buffer);
AssertFatal(encoded > 0, "ASN1 message encoding failed !\n");
item->pDUSessionResourceSetupResponseTransfer.buf = pdusessionTransfer_buffer;
item->pDUSessionResourceSetupResponseTransfer.size = encoded;
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_NGAP_PDUSessionResourceSetupResponseTransfer, &pdusessionTransfer);
// PDU Session Resource Setup Response Transfer (Mandatory)
byte_array_t ba = encode_ngap_pdusession_setup_response_transfer(&initial_ctxt_resp_p->pdusessions[i]);
item->pDUSessionResourceSetupResponseTransfer.buf = ba.buf;
item->pDUSessionResourceSetupResponseTransfer.size = ba.len;
}
}
/* optional */
@@ -924,40 +937,10 @@ int ngap_gNB_pdusession_setup_resp(instance_t instance, ngap_pdusession_setup_re
/* pDUSessionID */
item->pDUSessionID = pdusession->pdusession_id;
/* dLQosFlowPerTNLInformation */
NGAP_PDUSessionResourceSetupResponseTransfer_t pdusessionTransfer = {0};
pdusessionTransfer.dLQosFlowPerTNLInformation.uPTransportLayerInformation.present = NGAP_UPTransportLayerInformation_PR_gTPTunnel;
asn1cCalloc(pdusessionTransfer.dLQosFlowPerTNLInformation.uPTransportLayerInformation.choice.gTPTunnel, tmp);
GTP_TEID_TO_ASN1(pdusession->n3_outgoing.teid, &tmp->gTP_TEID);
tnl_to_bitstring(&tmp->transportLayerAddress, pdusession->n3_outgoing.addr);
NGAP_DEBUG("pdusession_setup_resp_p: pdusession ID %ld, gnb_addr %d.%d.%d.%d, SIZE %ld, TEID %u\n",
item->pDUSessionID,
tmp->transportLayerAddress.buf[0],
tmp->transportLayerAddress.buf[1],
tmp->transportLayerAddress.buf[2],
tmp->transportLayerAddress.buf[3],
tmp->transportLayerAddress.size,
pdusession->n3_outgoing.teid);
/* associatedQosFlowList. number of 1? */
for(int j=0; j < pdusession_setup_resp_p->pdusessions[i].nb_of_qos_flow; j++) {
asn1cSequenceAdd(pdusessionTransfer.dLQosFlowPerTNLInformation.associatedQosFlowList.list, NGAP_AssociatedQosFlowItem_t, ass_qos_item_p);
/* qosFlowIdentifier */
ass_qos_item_p->qosFlowIdentifier = pdusession_setup_resp_p->pdusessions[i].associated_qos_flows[j].qfi;
/* qosFlowMappingIndication */
// if(pdusession_setup_resp_p->pdusessions[i].associated_qos_flows[j].qos_flow_mapping_ind != QOSFLOW_MAPPING_INDICATION_NON) {
// ass_qos_item_p->qosFlowMappingIndication = malloc(sizeof(*ass_qos_item_p->qosFlowMappingIndication));
// *ass_qos_item_p->qosFlowMappingIndication = pdusession_setup_resp_p->pdusessions[i].associated_qos_flows[j].qos_flow_mapping_ind;
// }
}
asn_encode_to_new_buffer_result_t res = asn_encode_to_new_buffer(NULL, ATS_ALIGNED_CANONICAL_PER, &asn_DEF_NGAP_PDUSessionResourceSetupResponseTransfer, &pdusessionTransfer);
AssertFatal (res.buffer, "ASN1 message encoding failed (%s, %lu)!\n", res.result.failed_type->name, res.result.encoded);
item->pDUSessionResourceSetupResponseTransfer.buf = res.buffer;
item->pDUSessionResourceSetupResponseTransfer.size = res.result.encoded;
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_NGAP_PDUSessionResourceSetupResponseTransfer, &pdusessionTransfer);
// PDU Session Resource Setup Response Transfer (Mandatory)
byte_array_t ba = encode_ngap_pdusession_setup_response_transfer(pdusession);
item->pDUSessionResourceSetupResponseTransfer.buf = ba.buf;
item->pDUSessionResourceSetupResponseTransfer.size = ba.len;
}
}