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openairinterface5g/openair2/E1AP/lib/e1ap_bearer_context_management.c
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/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (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.openairinterface.org/?page_id=698
*
* 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.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*! \file e1ap_bearer_context_management.c
* \brief E1AP library for E1 Bearer Context Management
* \author Guido Casati
* \date 2024
* \version 0.1
*/
#include <string.h>
#include "common/utils/assertions.h"
#include "openair3/UTILS/conversions.h"
#include "common/utils/oai_asn1.h"
#include "common/utils/utils.h"
#include "e1ap_lib_common.h"
#include "e1ap_bearer_context_management.h"
#include "e1ap_lib_includes.h"
/* ====================================
* E1AP Bearer Context Setup Request
* ==================================== */
/**
* @brief Equality check for bearer_context_pdcp_config_t
*/
static bool eq_pdcp_config(const bearer_context_pdcp_config_t *a, const bearer_context_pdcp_config_t *b)
{
_E1_EQ_CHECK_LONG(a->pDCP_SN_Size_UL, b->pDCP_SN_Size_UL);
_E1_EQ_CHECK_LONG(a->pDCP_SN_Size_DL, b->pDCP_SN_Size_DL);
_E1_EQ_CHECK_LONG(a->rLC_Mode, b->rLC_Mode);
_E1_EQ_CHECK_LONG(a->reorderingTimer, b->reorderingTimer);
_E1_EQ_CHECK_LONG(a->discardTimer, b->discardTimer);
_E1_EQ_CHECK_INT(a->pDCP_Reestablishment, b->pDCP_Reestablishment);
return true;
}
/**
* @brief Equality check for bearer_context_sdap_config_t
*/
static bool eq_sdap_config(const bearer_context_sdap_config_t *a, const bearer_context_sdap_config_t *b)
{
_E1_EQ_CHECK_LONG(a->defaultDRB, b->defaultDRB);
_E1_EQ_CHECK_LONG(a->sDAP_Header_UL, b->sDAP_Header_UL);
_E1_EQ_CHECK_LONG(a->sDAP_Header_DL, b->sDAP_Header_DL);
return true;
}
/**
* @brief Equality check for qos_flow_to_setup_t
*/
static bool eq_qos_flow(const qos_flow_to_setup_t *a, const qos_flow_to_setup_t *b)
{
_E1_EQ_CHECK_LONG(a->qfi, b->qfi);
const ngran_allocation_retention_priority_t *arp_a = &a->qos_params.alloc_reten_priority;
const ngran_allocation_retention_priority_t *arp_b = &b->qos_params.alloc_reten_priority;
_E1_EQ_CHECK_INT(arp_a->preemption_capability, arp_b->preemption_capability);
_E1_EQ_CHECK_INT(arp_a->preemption_vulnerability, arp_b->preemption_vulnerability);
_E1_EQ_CHECK_INT(arp_a->priority_level, arp_b->priority_level);
const qos_characteristics_t *qos_a = &a->qos_params.qos_characteristics;
const qos_characteristics_t *qos_b = &b->qos_params.qos_characteristics;
_E1_EQ_CHECK_INT(qos_a->qos_type, qos_b->qos_type);
_E1_EQ_CHECK_INT(qos_a->dynamic.fiveqi, qos_b->dynamic.fiveqi);
_E1_EQ_CHECK_INT(qos_a->dynamic.packet_delay_budget, qos_b->dynamic.packet_delay_budget);
_E1_EQ_CHECK_INT(qos_a->dynamic.packet_error_rate.per_exponent, qos_b->dynamic.packet_error_rate.per_exponent);
_E1_EQ_CHECK_INT(qos_a->dynamic.packet_error_rate.per_scalar, qos_b->dynamic.packet_error_rate.per_scalar);
_E1_EQ_CHECK_INT(qos_a->dynamic.qos_priority_level, qos_b->dynamic.qos_priority_level);
_E1_EQ_CHECK_INT(qos_a->non_dynamic.fiveqi, qos_b->non_dynamic.fiveqi);
_E1_EQ_CHECK_INT(qos_a->non_dynamic.qos_priority_level, qos_b->non_dynamic.qos_priority_level);
return true;
}
/**
* @brief Equality check for DRB_nGRAN_to_setup_t
*/
static bool eq_drb_to_setup(const DRB_nGRAN_to_setup_t *a, const DRB_nGRAN_to_setup_t *b)
{
bool result = true;
_E1_EQ_CHECK_LONG(a->id, b->id);
_E1_EQ_CHECK_INT(a->numCellGroups, b->numCellGroups);
for (int i = 0; i < a->numCellGroups; i++) {
_E1_EQ_CHECK_INT(a->cellGroupList[i], b->cellGroupList[i]);
}
_E1_EQ_CHECK_INT(a->numQosFlow2Setup, b->numQosFlow2Setup);
for (int i = 0; i < a->numQosFlow2Setup; i++) {
result &= eq_qos_flow(&a->qosFlows[i], &b->qosFlows[i]);
}
result &= eq_pdcp_config(&a->pdcp_config, &b->pdcp_config);
result &= eq_sdap_config(&a->sdap_config, &b->sdap_config);
return result;
}
/**
* @brief Equality check for DRB_nGRAN_to_mod_t
*/
static bool eq_drb_to_mod(const DRB_nGRAN_to_mod_t *a, const DRB_nGRAN_to_mod_t *b)
{
bool result = true;
_E1_EQ_CHECK_LONG(a->id, b->id);
_E1_EQ_CHECK_INT(a->numCellGroups, b->numCellGroups);
for (int i = 0; i < a->numCellGroups; i++) {
_E1_EQ_CHECK_INT(a->cellGroupList[i], b->cellGroupList[i]);
}
_E1_EQ_CHECK_INT(a->numQosFlow2Setup, b->numQosFlow2Setup);
for (int i = 0; i < a->numQosFlow2Setup; i++) {
result &= eq_qos_flow(&a->qosFlows[i], &b->qosFlows[i]);
}
_E1_EQ_CHECK_INT(a->tlAddress, b->tlAddress);
_E1_EQ_CHECK_INT(a->teId, b->teId);
_E1_EQ_CHECK_INT(a->numDlUpParam, b->numDlUpParam);
for (int i = 0; i < a->numDlUpParam; i++) {
_E1_EQ_CHECK_INT(a->DlUpParamList[i].cell_group_id, b->DlUpParamList[i].cell_group_id);
_E1_EQ_CHECK_LONG(a->DlUpParamList[i].teId, b->DlUpParamList[i].teId);
_E1_EQ_CHECK_INT(a->DlUpParamList[i].tlAddress, b->DlUpParamList[i].tlAddress);
}
result &= eq_pdcp_config(&a->pdcp_config, &b->pdcp_config);
result &= eq_sdap_config(&a->sdap_config, &b->sdap_config);
return result;
}
/* PDU Session To Setup Item */
static bool e1_encode_pdu_session_to_setup_item(E1AP_PDU_Session_Resource_To_Setup_Item_t *item, const pdu_session_to_setup_t *in)
{
item->pDU_Session_ID = in->sessionId;
item->pDU_Session_Type = in->sessionType;
// SNSSAI
INT8_TO_OCTET_STRING(in->nssai.sst, &item->sNSSAI.sST);
if (in->nssai.sd != 0xffffff) {
item->sNSSAI.sD = malloc_or_fail(sizeof(*item->sNSSAI.sD));
INT24_TO_OCTET_STRING(in->nssai.sd, item->sNSSAI.sD);
}
// Security Indication
E1AP_SecurityIndication_t *siOut = &item->securityIndication;
const security_indication_t *siIn = &in->securityIndication;
siOut->integrityProtectionIndication = siIn->integrityProtectionIndication;
siOut->confidentialityProtectionIndication = siIn->confidentialityProtectionIndication;
if (siIn->integrityProtectionIndication != SECURITY_NOT_NEEDED) {
asn1cCalloc(siOut->maximumIPdatarate, ipDataRate);
ipDataRate->maxIPrate = siIn->maxIPrate;
}
// TNL Information
item->nG_UL_UP_TNL_Information.present = E1AP_UP_TNL_Information_PR_gTPTunnel;
asn1cCalloc(item->nG_UL_UP_TNL_Information.choice.gTPTunnel, gTPTunnel);
const UP_TL_information_t *UP_TL_information = &in->UP_TL_information;
TRANSPORT_LAYER_ADDRESS_IPv4_TO_BIT_STRING(UP_TL_information->tlAddress, &gTPTunnel->transportLayerAddress);
INT32_TO_OCTET_STRING(UP_TL_information->teId, &gTPTunnel->gTP_TEID);
// DRB to setup
for (const DRB_nGRAN_to_setup_t *j = in->DRBnGRanList; j < in->DRBnGRanList + in->numDRB2Setup; j++) {
asn1cSequenceAdd(item->dRB_To_Setup_List_NG_RAN.list, E1AP_DRB_To_Setup_Item_NG_RAN_t, ieC6_1_1);
ieC6_1_1->dRB_ID = j->id;
// SDAP Config
E1AP_SDAP_Configuration_t *sdap = &ieC6_1_1->sDAP_Configuration;
sdap->defaultDRB = j->sdap_config.defaultDRB ? E1AP_DefaultDRB_true : E1AP_DefaultDRB_false;
sdap->sDAP_Header_UL = j->sdap_config.sDAP_Header_UL;
sdap->sDAP_Header_DL = j->sdap_config.sDAP_Header_DL;
// PDCP Config
E1AP_PDCP_Configuration_t *pdcp = &ieC6_1_1->pDCP_Configuration;
pdcp->pDCP_SN_Size_UL = j->pdcp_config.pDCP_SN_Size_UL;
pdcp->pDCP_SN_Size_DL = j->pdcp_config.pDCP_SN_Size_DL;
asn1cCallocOne(pdcp->discardTimer, j->pdcp_config.discardTimer);
E1AP_T_ReorderingTimer_t *roTimer = calloc_or_fail(1, sizeof(*roTimer));
pdcp->t_ReorderingTimer = roTimer;
roTimer->t_Reordering = j->pdcp_config.reorderingTimer;
pdcp->rLC_Mode = j->pdcp_config.rLC_Mode;
// Cell Group
for (const cell_group_id_t *k = j->cellGroupList; k < j->cellGroupList + j->numCellGroups; k++) {
asn1cSequenceAdd(ieC6_1_1->cell_Group_Information.list, E1AP_Cell_Group_Information_Item_t, ieC6_1_1_1);
ieC6_1_1_1->cell_Group_ID = *k;
}
// QoS Flows
for (const qos_flow_to_setup_t *k = j->qosFlows; k < j->qosFlows + j->numQosFlow2Setup; k++) {
asn1cSequenceAdd(ieC6_1_1->qos_flow_Information_To_Be_Setup, E1AP_QoS_Flow_QoS_Parameter_Item_t, ieC6_1_1_1);
ieC6_1_1_1->qoS_Flow_Identifier = k->qfi;
// QoS Characteristics
const qos_characteristics_t *qos_char_in = &k->qos_params.qos_characteristics;
if (qos_char_in->qos_type == NON_DYNAMIC) { // non Dynamic 5QI
ieC6_1_1_1->qoSFlowLevelQoSParameters.qoS_Characteristics.present = E1AP_QoS_Characteristics_PR_non_Dynamic_5QI;
asn1cCalloc(ieC6_1_1_1->qoSFlowLevelQoSParameters.qoS_Characteristics.choice.non_Dynamic_5QI, non_Dynamic_5QI);
non_Dynamic_5QI->fiveQI = qos_char_in->non_dynamic.fiveqi;
} else { // dynamic 5QI
ieC6_1_1_1->qoSFlowLevelQoSParameters.qoS_Characteristics.present = E1AP_QoS_Characteristics_PR_dynamic_5QI;
asn1cCalloc(ieC6_1_1_1->qoSFlowLevelQoSParameters.qoS_Characteristics.choice.dynamic_5QI, dynamic_5QI);
dynamic_5QI->qoSPriorityLevel = qos_char_in->dynamic.qos_priority_level;
dynamic_5QI->packetDelayBudget = qos_char_in->dynamic.packet_delay_budget;
dynamic_5QI->packetErrorRate.pER_Scalar = qos_char_in->dynamic.packet_error_rate.per_scalar;
dynamic_5QI->packetErrorRate.pER_Exponent = qos_char_in->dynamic.packet_error_rate.per_exponent;
}
// QoS Retention Priority
const ngran_allocation_retention_priority_t *rent_priority_in = &k->qos_params.alloc_reten_priority;
E1AP_NGRANAllocationAndRetentionPriority_t *arp = &ieC6_1_1_1->qoSFlowLevelQoSParameters.nGRANallocationRetentionPriority;
arp->priorityLevel = rent_priority_in->priority_level;
arp->pre_emptionCapability = rent_priority_in->preemption_capability;
arp->pre_emptionVulnerability = rent_priority_in->preemption_vulnerability;
}
}
return true;
}
static bool e1_decode_pdu_session_to_setup_item(pdu_session_to_setup_t *out, E1AP_PDU_Session_Resource_To_Setup_Item_t *item)
{
// PDU Session ID (M)
out->sessionId = item->pDU_Session_ID;
// PDU Session Type (M)
out->sessionType = item->pDU_Session_Type;
/* S-NSSAI (M) */
// SST (M)
OCTET_STRING_TO_INT8(&item->sNSSAI.sST, out->nssai.sst);
out->nssai.sd = 0xffffff;
// SD (O)
if (item->sNSSAI.sD != NULL)
OCTET_STRING_TO_INT24(item->sNSSAI.sD, out->nssai.sd);
/* Security Indication (M) */
E1AP_SecurityIndication_t *securityIndication = &item->securityIndication;
// Integrity Protection Indication (M)
security_indication_t *sec = &out->securityIndication;
sec->integrityProtectionIndication = securityIndication->integrityProtectionIndication;
// Confidentiality Protection Indication (M)
sec->confidentialityProtectionIndication = securityIndication->confidentialityProtectionIndication;
// Maximum Integrity Protected Data Rate (Conditional)
if (sec->integrityProtectionIndication != SECURITY_NOT_NEEDED) {
if (securityIndication->maximumIPdatarate)
sec->maxIPrate = securityIndication->maximumIPdatarate->maxIPrate;
else {
PRINT_ERROR("Received integrityProtectionIndication but maximumIPdatarate IE is missing\n");
return false;
}
}
/* NG UL UP Transport Layer Information (M) (9.3.2.1 of 3GPP TS 38.463) */
// GTP Tunnel
struct E1AP_GTPTunnel *gTPTunnel = item->nG_UL_UP_TNL_Information.choice.gTPTunnel;
if (!gTPTunnel) {
PRINT_ERROR("Missing mandatory IE item->nG_UL_UP_TNL_Information.choice.gTPTunnel\n");
return false;
}
_E1_EQ_CHECK_INT(item->nG_UL_UP_TNL_Information.present, E1AP_UP_TNL_Information_PR_gTPTunnel);
// Transport Layer Address
UP_TL_information_t *UP_TL_information = &out->UP_TL_information;
BIT_STRING_TO_TRANSPORT_LAYER_ADDRESS_IPv4(&gTPTunnel->transportLayerAddress, UP_TL_information->tlAddress);
// GTP-TEID
OCTET_STRING_TO_INT32(&gTPTunnel->gTP_TEID, UP_TL_information->teId);
// DRB To Setup List ( > 1 item )
E1AP_DRB_To_Setup_List_NG_RAN_t *drb2SetupList = &item->dRB_To_Setup_List_NG_RAN;
_E1_EQ_CHECK_GENERIC(drb2SetupList->list.count > 0, "%d", drb2SetupList->list.count, 0);
out->numDRB2Setup = drb2SetupList->list.count;
_E1_EQ_CHECK_INT(out->numDRB2Setup, 1); // can only handle one DRB per PDU session
for (int j = 0; j < drb2SetupList->list.count; j++) {
DRB_nGRAN_to_setup_t *drb = out->DRBnGRanList + j;
E1AP_DRB_To_Setup_Item_NG_RAN_t *drb2Setup = drb2SetupList->list.array[j];
// DRB ID (M)
drb->id = drb2Setup->dRB_ID;
// >SDAP Configuration (M)
E1AP_SDAP_Configuration_t *sdap = &drb2Setup->sDAP_Configuration;
drb->sdap_config.defaultDRB = sdap->defaultDRB == E1AP_DefaultDRB_true;
drb->sdap_config.sDAP_Header_UL = sdap->sDAP_Header_UL;
drb->sdap_config.sDAP_Header_DL = sdap->sDAP_Header_DL;
// PDCP Configuration (M)
E1AP_PDCP_Configuration_t *pdcp = &drb2Setup->pDCP_Configuration;
drb->pdcp_config.pDCP_SN_Size_UL = pdcp->pDCP_SN_Size_UL;
drb->pdcp_config.pDCP_SN_Size_DL = pdcp->pDCP_SN_Size_DL;
if (pdcp->discardTimer) {
drb->pdcp_config.discardTimer = *pdcp->discardTimer;
}
if (pdcp->t_ReorderingTimer) {
drb->pdcp_config.reorderingTimer = pdcp->t_ReorderingTimer->t_Reordering;
}
drb->pdcp_config.rLC_Mode = pdcp->rLC_Mode;
// Cell Group Information (M) ( > 1 item )
E1AP_Cell_Group_Information_t *cellGroupList = &drb2Setup->cell_Group_Information;
_E1_EQ_CHECK_GENERIC(cellGroupList->list.count > 0, "%d", cellGroupList->list.count, 0);
drb->numCellGroups = cellGroupList->list.count;
for (int k = 0; k < cellGroupList->list.count; k++) {
E1AP_Cell_Group_Information_Item_t *cg2Setup = cellGroupList->list.array[k];
// Cell Group ID
drb->cellGroupList[k] = cg2Setup->cell_Group_ID;
}
// QoS Flows Information To Be Setup (M)
E1AP_QoS_Flow_QoS_Parameter_List_t *qos2SetupList = &drb2Setup->qos_flow_Information_To_Be_Setup;
drb->numQosFlow2Setup = qos2SetupList->list.count;
for (int k = 0; k < qos2SetupList->list.count; k++) {
qos_flow_to_setup_t *qos_flow = drb->qosFlows + k;
E1AP_QoS_Flow_QoS_Parameter_Item_t *qos2Setup = qos2SetupList->list.array[k];
// QoS Flow Identifier (M)
qos_flow->qfi = qos2Setup->qoS_Flow_Identifier;
qos_characteristics_t *qos_char = &qos_flow->qos_params.qos_characteristics;
// QoS Flow Level QoS Parameters (M)
E1AP_QoSFlowLevelQoSParameters_t *qosParams = &qos2Setup->qoSFlowLevelQoSParameters;
E1AP_QoS_Characteristics_t *qoS_Characteristics = &qosParams->qoS_Characteristics;
switch (qoS_Characteristics->present) {
case E1AP_QoS_Characteristics_PR_non_Dynamic_5QI:
qos_char->qos_type = NON_DYNAMIC;
qos_char->non_dynamic.fiveqi = qoS_Characteristics->choice.non_Dynamic_5QI->fiveQI;
break;
case E1AP_QoS_Characteristics_PR_dynamic_5QI: {
E1AP_Dynamic5QIDescriptor_t *dynamic5QI = qoS_Characteristics->choice.dynamic_5QI;
qos_char->qos_type = DYNAMIC;
qos_char->dynamic.qos_priority_level = dynamic5QI->qoSPriorityLevel;
qos_char->dynamic.packet_delay_budget = dynamic5QI->packetDelayBudget;
qos_char->dynamic.packet_error_rate.per_scalar = dynamic5QI->packetErrorRate.pER_Scalar;
qos_char->dynamic.packet_error_rate.per_exponent = dynamic5QI->packetErrorRate.pER_Exponent;
break;
}
default:
PRINT_ERROR("Unexpected QoS Characteristics type: %d\n", qoS_Characteristics->present);
return false;
break;
}
// NG-RAN Allocation and Retention Priority (M)
ngran_allocation_retention_priority_t *rent_priority = &qos_flow->qos_params.alloc_reten_priority;
E1AP_NGRANAllocationAndRetentionPriority_t *aRP = &qosParams->nGRANallocationRetentionPriority;
rent_priority->priority_level = aRP->priorityLevel;
rent_priority->preemption_capability = aRP->pre_emptionCapability;
rent_priority->preemption_vulnerability = aRP->pre_emptionVulnerability;
}
}
return true;
}
/**
* @brief Equality check for PDU session item to modify/setup
*/
static bool eq_pdu_session_item(const pdu_session_to_setup_t *a, const pdu_session_to_setup_t *b)
{
_E1_EQ_CHECK_LONG(a->sessionId, b->sessionId);
_E1_EQ_CHECK_LONG(a->sessionType, b->sessionType);
_E1_EQ_CHECK_INT(a->UP_TL_information.tlAddress, b->UP_TL_information.tlAddress);
_E1_EQ_CHECK_INT(a->UP_TL_information.teId, b->UP_TL_information.teId);
_E1_EQ_CHECK_LONG(a->numDRB2Setup, b->numDRB2Setup);
if (a->numDRB2Setup != b->numDRB2Setup)
return false;
for (int i = 0; i < a->numDRB2Setup; i++)
if (!eq_drb_to_setup(&a->DRBnGRanList[i], &b->DRBnGRanList[i]))
return false;
_E1_EQ_CHECK_LONG(a->numDRB2Modify, b->numDRB2Modify);
if (a->numDRB2Modify != b->numDRB2Modify)
return false;
for (int i = 0; i < a->numDRB2Modify; i++)
if (!eq_drb_to_mod(&a->DRBnGRanModList[i], &b->DRBnGRanModList[i]))
return false;
return true;
}
static bool cp_pdu_session_item(pdu_session_to_setup_t *cp, const pdu_session_to_setup_t *msg)
{
// Copy basic fields
*cp = *msg;
// Copy DRB to Setup List
for (int j = 0; j < msg->numDRB2Setup; j++) {
cp->DRBnGRanList[j].id = msg->DRBnGRanList[j].id;
cp->DRBnGRanList[j].sdap_config = msg->DRBnGRanList[j].sdap_config;
cp->DRBnGRanList[j].pdcp_config = msg->DRBnGRanList[j].pdcp_config;
cp->DRBnGRanList[j].tlAddress = msg->DRBnGRanList[j].tlAddress;
cp->DRBnGRanList[j].teId = msg->DRBnGRanList[j].teId;
cp->DRBnGRanList[j].numDlUpParam = msg->DRBnGRanList[j].numDlUpParam;
// Copy DL UP Params List
for (int k = 0; k < msg->DRBnGRanList[j].numDlUpParam; k++) {
cp->DRBnGRanList[j].DlUpParamList[k] = msg->DRBnGRanList[j].DlUpParamList[k];
}
cp->DRBnGRanList[j].numCellGroups = msg->DRBnGRanList[j].numCellGroups;
// Copy Cell Group List
for (int k = 0; k < msg->DRBnGRanList[j].numCellGroups; k++) {
cp->DRBnGRanList[j].cellGroupList[k] = msg->DRBnGRanList[j].cellGroupList[k];
}
cp->DRBnGRanList[j].numQosFlow2Setup = msg->DRBnGRanList[j].numQosFlow2Setup;
// Copy QoS Flow To Setup List
for (int k = 0; k < msg->DRBnGRanList[j].numQosFlow2Setup; k++) {
cp->DRBnGRanList[j].qosFlows[k].qfi = msg->DRBnGRanList[j].qosFlows[k].qfi;
cp->DRBnGRanList[j].qosFlows[k].qos_params = msg->DRBnGRanList[j].qosFlows[k].qos_params;
}
}
// Copy DRB to Modify List
for (int j = 0; j < msg->numDRB2Modify; j++) {
cp->DRBnGRanModList[j] = msg->DRBnGRanModList[j];
}
return true;
}
/**
* @brief E1AP Bearer Context Setup Request encoding (9.2.2 of 3GPP TS 38.463)
*/
E1AP_E1AP_PDU_t *encode_E1_bearer_context_setup_request(const e1ap_bearer_setup_req_t *msg)
{
E1AP_E1AP_PDU_t *pdu = calloc_or_fail(1, sizeof(*pdu));
pdu->present = E1AP_E1AP_PDU_PR_initiatingMessage;
asn1cCalloc(pdu->choice.initiatingMessage, initMsg);
initMsg->procedureCode = E1AP_ProcedureCode_id_bearerContextSetup;
initMsg->criticality = E1AP_Criticality_reject;
initMsg->value.present = E1AP_InitiatingMessage__value_PR_BearerContextSetupRequest;
E1AP_BearerContextSetupRequest_t *out = &pdu->choice.initiatingMessage->value.choice.BearerContextSetupRequest;
/* mandatory */
/* c1. gNB-CU-UP UE E1AP ID */
asn1cSequenceAdd(out->protocolIEs.list, E1AP_BearerContextSetupRequestIEs_t, ieC1);
ieC1->id = E1AP_ProtocolIE_ID_id_gNB_CU_CP_UE_E1AP_ID;
ieC1->criticality = E1AP_Criticality_reject;
ieC1->value.present = E1AP_BearerContextSetupRequestIEs__value_PR_GNB_CU_CP_UE_E1AP_ID;
ieC1->value.choice.GNB_CU_CP_UE_E1AP_ID = msg->gNB_cu_cp_ue_id;
/* mandatory */
/* c2. Security Information */
asn1cSequenceAdd(out->protocolIEs.list, E1AP_BearerContextSetupRequestIEs_t, ieC2);
ieC2->id = E1AP_ProtocolIE_ID_id_SecurityInformation;
ieC2->criticality = E1AP_Criticality_reject;
ieC2->value.present = E1AP_BearerContextSetupRequestIEs__value_PR_SecurityInformation;
E1AP_SecurityAlgorithm_t *securityAlgorithm = &ieC2->value.choice.SecurityInformation.securityAlgorithm;
E1AP_UPSecuritykey_t *uPSecuritykey = &ieC2->value.choice.SecurityInformation.uPSecuritykey;
securityAlgorithm->cipheringAlgorithm = msg->cipheringAlgorithm;
OCTET_STRING_fromBuf(&uPSecuritykey->encryptionKey, msg->encryptionKey, E1AP_SECURITY_KEY_SIZE);
asn1cCallocOne(securityAlgorithm->integrityProtectionAlgorithm, msg->integrityProtectionAlgorithm);
asn1cCalloc(uPSecuritykey->integrityProtectionKey, protKey);
OCTET_STRING_fromBuf(protKey, msg->integrityProtectionKey, E1AP_SECURITY_KEY_SIZE);
/* mandatory */
/* c3. UE DL Aggregate Maximum Bit Rate */
asn1cSequenceAdd(out->protocolIEs.list, E1AP_BearerContextSetupRequestIEs_t, ieC3);
ieC3->id = E1AP_ProtocolIE_ID_id_UEDLAggregateMaximumBitRate;
ieC3->criticality = E1AP_Criticality_reject;
ieC3->value.present = E1AP_BearerContextSetupRequestIEs__value_PR_BitRate;
asn_long2INTEGER(&ieC3->value.choice.BitRate, msg->ueDlAggMaxBitRate);
/* mandatory */
/* c4. Serving PLMN */
asn1cSequenceAdd(out->protocolIEs.list, E1AP_BearerContextSetupRequestIEs_t, ieC4);
ieC4->id = E1AP_ProtocolIE_ID_id_Serving_PLMN;
ieC4->criticality = E1AP_Criticality_ignore;
ieC4->value.present = E1AP_BearerContextSetupRequestIEs__value_PR_PLMN_Identity;
const PLMN_ID_t *servingPLMN = &msg->servingPLMNid;
MCC_MNC_TO_PLMNID(servingPLMN->mcc, servingPLMN->mnc, servingPLMN->mnc_digit_length, &ieC4->value.choice.PLMN_Identity);
/* mandatory */
/* Activity Notification Level */
asn1cSequenceAdd(out->protocolIEs.list, E1AP_BearerContextSetupRequestIEs_t, ieC5);
ieC5->id = E1AP_ProtocolIE_ID_id_ActivityNotificationLevel;
ieC5->criticality = E1AP_Criticality_reject;
ieC5->value.present = E1AP_BearerContextSetupRequestIEs__value_PR_ActivityNotificationLevel;
ieC5->value.choice.ActivityNotificationLevel = E1AP_ActivityNotificationLevel_pdu_session; // TODO: Remove hard coding
/* mandatory */
/* */
asn1cSequenceAdd(out->protocolIEs.list, E1AP_BearerContextSetupRequestIEs_t, ieC6);
ieC6->id = E1AP_ProtocolIE_ID_id_System_BearerContextSetupRequest;
ieC6->criticality = E1AP_Criticality_reject;
ieC6->value.present = E1AP_BearerContextSetupRequestIEs__value_PR_System_BearerContextSetupRequest;
ieC6->value.choice.System_BearerContextSetupRequest.present =
E1AP_System_BearerContextSetupRequest_PR_nG_RAN_BearerContextSetupRequest;
E1AP_ProtocolIE_Container_4932P19_t *msgNGRAN_list = calloc_or_fail(1, sizeof(*msgNGRAN_list));
ieC6->value.choice.System_BearerContextSetupRequest.choice.nG_RAN_BearerContextSetupRequest =
(struct E1AP_ProtocolIE_Container *)msgNGRAN_list;
asn1cSequenceAdd(msgNGRAN_list->list, E1AP_NG_RAN_BearerContextSetupRequest_t, msgNGRAN);
msgNGRAN->id = E1AP_ProtocolIE_ID_id_PDU_Session_Resource_To_Setup_List;
msgNGRAN->criticality = E1AP_Criticality_reject;
msgNGRAN->value.present = E1AP_NG_RAN_BearerContextSetupRequest__value_PR_PDU_Session_Resource_To_Setup_List;
E1AP_PDU_Session_Resource_To_Setup_List_t *pdu2Setup = &msgNGRAN->value.choice.PDU_Session_Resource_To_Setup_List;
for (int i = 0; i < msg->numPDUSessions; i++) {
const pdu_session_to_setup_t *pdu_session = &msg->pduSession[i];
asn1cSequenceAdd(pdu2Setup->list, E1AP_PDU_Session_Resource_To_Setup_Item_t, ieC6_1);
e1_encode_pdu_session_to_setup_item(ieC6_1, pdu_session);
}
return pdu;
}
/**
* @brief E1AP Bearer Context Setup Request memory management
*/
void free_e1ap_context_setup_request(e1ap_bearer_setup_req_t *msg)
{
// Do nothing
}
/**
* @brief E1AP Bearer Context Setup Request decoding
* gNB-CU-CP → gNB-CU-UP (9.2.2.1 of 3GPP TS 38.463)
*/
bool decode_E1_bearer_context_setup_request(const E1AP_E1AP_PDU_t *pdu, e1ap_bearer_setup_req_t *out)
{
DevAssert(pdu != NULL);
// Check message type
_E1_EQ_CHECK_INT(pdu->present,E1AP_E1AP_PDU_PR_initiatingMessage);
_E1_EQ_CHECK_INT(pdu->choice.initiatingMessage->procedureCode, E1AP_ProcedureCode_id_bearerContextSetup);
_E1_EQ_CHECK_INT(pdu->choice.initiatingMessage->criticality, E1AP_Criticality_reject);
_E1_EQ_CHECK_INT(pdu->choice.initiatingMessage->value.present, E1AP_InitiatingMessage__value_PR_BearerContextSetupRequest);
const E1AP_BearerContextSetupRequest_t *in = &pdu->choice.initiatingMessage->value.choice.BearerContextSetupRequest;
E1AP_BearerContextSetupRequestIEs_t *ie;
// Check mandatory IEs first
E1AP_LIB_FIND_IE(E1AP_BearerContextSetupRequestIEs_t, ie, in, E1AP_ProtocolIE_ID_id_gNB_CU_CP_UE_E1AP_ID, true);
E1AP_LIB_FIND_IE(E1AP_BearerContextSetupRequestIEs_t, ie, in, E1AP_ProtocolIE_ID_id_SecurityInformation, true);
E1AP_LIB_FIND_IE(E1AP_BearerContextSetupRequestIEs_t, ie, in, E1AP_ProtocolIE_ID_id_UEDLAggregateMaximumBitRate, true);
E1AP_LIB_FIND_IE(E1AP_BearerContextSetupRequestIEs_t, ie, in, E1AP_ProtocolIE_ID_id_Serving_PLMN, true);
E1AP_LIB_FIND_IE(E1AP_BearerContextSetupRequestIEs_t, ie, in, E1AP_ProtocolIE_ID_id_ActivityNotificationLevel, true);
E1AP_LIB_FIND_IE(E1AP_BearerContextSetupRequestIEs_t, ie, in, E1AP_ProtocolIE_ID_id_System_BearerContextSetupRequest, true);
// Loop over all IEs
for (int i = 0; i < in->protocolIEs.list.count; i++) {
ie = in->protocolIEs.list.array[i];
AssertFatal(ie != NULL, "in->protocolIEs.list.array[i] shall not be null");
switch (ie->id) {
case E1AP_ProtocolIE_ID_id_gNB_CU_CP_UE_E1AP_ID:
_E1_EQ_CHECK_INT(ie->value.present, E1AP_BearerContextSetupRequestIEs__value_PR_GNB_CU_CP_UE_E1AP_ID);
out->gNB_cu_cp_ue_id = ie->value.choice.GNB_CU_CP_UE_E1AP_ID;
break;
case E1AP_ProtocolIE_ID_id_SecurityInformation:
_E1_EQ_CHECK_INT(ie->value.present, E1AP_BearerContextSetupRequestIEs__value_PR_SecurityInformation);
E1AP_SecurityInformation_t *SecurityInformation = &ie->value.choice.SecurityInformation;
E1AP_SecurityAlgorithm_t *securityAlgorithm = &SecurityInformation->securityAlgorithm;
E1AP_EncryptionKey_t *encryptionKey = &SecurityInformation->uPSecuritykey.encryptionKey;
E1AP_IntegrityProtectionKey_t *integrityProtectionKey = SecurityInformation->uPSecuritykey.integrityProtectionKey;
out->cipheringAlgorithm = securityAlgorithm->cipheringAlgorithm;
memcpy(out->encryptionKey, encryptionKey->buf, encryptionKey->size);
if (securityAlgorithm->integrityProtectionAlgorithm)
out->integrityProtectionAlgorithm = *securityAlgorithm->integrityProtectionAlgorithm;
if (integrityProtectionKey)
memcpy(out->integrityProtectionKey, integrityProtectionKey->buf, integrityProtectionKey->size);
break;
case E1AP_ProtocolIE_ID_id_UEDLAggregateMaximumBitRate:
_E1_EQ_CHECK_INT(ie->value.present, E1AP_BearerContextSetupRequestIEs__value_PR_BitRate);
asn_INTEGER2long(&ie->value.choice.BitRate, &out->ueDlAggMaxBitRate);
break;
case E1AP_ProtocolIE_ID_id_Serving_PLMN:
_E1_EQ_CHECK_INT(ie->value.present, E1AP_BearerContextSetupRequestIEs__value_PR_PLMN_Identity);
PLMNID_TO_MCC_MNC(&ie->value.choice.PLMN_Identity,
out->servingPLMNid.mcc,
out->servingPLMNid.mnc,
out->servingPLMNid.mnc_digit_length);
break;
case E1AP_ProtocolIE_ID_id_ActivityNotificationLevel:
_E1_EQ_CHECK_INT(ie->value.present, E1AP_BearerContextSetupRequestIEs__value_PR_ActivityNotificationLevel);
DevAssert(ie->value.present == E1AP_BearerContextSetupRequestIEs__value_PR_ActivityNotificationLevel);
out->activityNotificationLevel = ie->value.choice.ActivityNotificationLevel;
break;
case E1AP_ProtocolIE_ID_id_System_BearerContextSetupRequest:
_E1_EQ_CHECK_INT(ie->value.present, E1AP_BearerContextSetupRequestIEs__value_PR_System_BearerContextSetupRequest);
E1AP_System_BearerContextSetupRequest_t *System_BearerContextSetupRequest =
&ie->value.choice.System_BearerContextSetupRequest;
switch (System_BearerContextSetupRequest->present) {
case E1AP_System_BearerContextSetupRequest_PR_NOTHING:
PRINT_ERROR("System Bearer Context Setup Request: no choice present\n");
break;
case E1AP_System_BearerContextSetupRequest_PR_e_UTRAN_BearerContextSetupRequest:
AssertError(System_BearerContextSetupRequest->present == E1AP_System_BearerContextSetupRequest_PR_e_UTRAN_BearerContextSetupRequest,
return false, "E1AP_System_BearerContextSetupRequest_PR_e_UTRAN_BearerContextSetupRequest in E1 Setup Request not supported");
break;
case E1AP_System_BearerContextSetupRequest_PR_nG_RAN_BearerContextSetupRequest:
// Handle nG-RAN Bearer Context Setup Request
_E1_EQ_CHECK_INT(System_BearerContextSetupRequest->present,
E1AP_System_BearerContextSetupRequest_PR_nG_RAN_BearerContextSetupRequest);
AssertFatal(System_BearerContextSetupRequest->choice.nG_RAN_BearerContextSetupRequest != NULL,
"System_BearerContextSetupRequest->choice.nG_RAN_BearerContextSetupRequest shall not be null");
break;
default:
PRINT_ERROR("System Bearer Context Setup Request: No valid choice present.\n");
break;
}
E1AP_ProtocolIE_Container_4932P19_t *msgNGRAN_list =
(E1AP_ProtocolIE_Container_4932P19_t *)System_BearerContextSetupRequest->choice.nG_RAN_BearerContextSetupRequest;
E1AP_NG_RAN_BearerContextSetupRequest_t *msgNGRAN = msgNGRAN_list->list.array[0];
// NG-RAN
_E1_EQ_CHECK_INT(msgNGRAN_list->list.count, 1); // only one RAN is expected
_E1_EQ_CHECK_LONG(msgNGRAN->id, E1AP_ProtocolIE_ID_id_PDU_Session_Resource_To_Setup_List);
_E1_EQ_CHECK_INT(msgNGRAN->value.present,
E1AP_NG_RAN_BearerContextSetupRequest__value_PR_PDU_Session_Resource_To_Setup_List);
// PDU Session Resource To Setup List (9.3.3.2 of 3GPP TS 38.463)
E1AP_PDU_Session_Resource_To_Setup_List_t *pdu2SetupList = &msgNGRAN->value.choice.PDU_Session_Resource_To_Setup_List;
out->numPDUSessions = pdu2SetupList->list.count;
// Loop through all PDU sessions
for (int i = 0; i < pdu2SetupList->list.count; i++) {
pdu_session_to_setup_t *pdu_session = out->pduSession + i;
E1AP_PDU_Session_Resource_To_Setup_Item_t *pdu2Setup = pdu2SetupList->list.array[i];
if (!e1_decode_pdu_session_to_setup_item(pdu_session, pdu2Setup)) {
PRINT_ERROR("Failed to decode PDU Session to setup item %d\n", i);
return false;
}
}
break;
default:
PRINT_ERROR("Handle for this IE %ld is not implemented (or) invalid IE detected\n", ie->id);
break;
}
}
return true;
}
/**
* @brief Deep copy function for E1 BEARER CONTEXT SETUP REQUEST
*/
e1ap_bearer_setup_req_t cp_bearer_context_setup_request(const e1ap_bearer_setup_req_t *msg)
{
e1ap_bearer_setup_req_t cp = {0};
// Copy basi fields
cp = *msg;
strncpy(cp.encryptionKey, msg->encryptionKey, sizeof(cp.encryptionKey));
strncpy(cp.integrityProtectionKey, msg->integrityProtectionKey, sizeof(cp.integrityProtectionKey));
// Copy PDU Sessions
for (int i = 0; i < msg->numPDUSessions; i++)
cp_pdu_session_item(&cp.pduSession[i], &msg->pduSession[i]);
return cp;
}
/**
* @brief E1AP Bearer Context Setup Request equality check
*/
bool eq_bearer_context_setup_request(const e1ap_bearer_setup_req_t *a, const e1ap_bearer_setup_req_t *b)
{
// Primitive data types
_E1_EQ_CHECK_INT(a->gNB_cu_cp_ue_id, b->gNB_cu_cp_ue_id);
_E1_EQ_CHECK_LONG(a->cipheringAlgorithm, b->cipheringAlgorithm);
_E1_EQ_CHECK_LONG(a->integrityProtectionAlgorithm, b->integrityProtectionAlgorithm);
_E1_EQ_CHECK_LONG(a->ueDlAggMaxBitRate, b->ueDlAggMaxBitRate);
_E1_EQ_CHECK_INT(a->activityNotificationLevel, b->activityNotificationLevel);
_E1_EQ_CHECK_INT(a->numPDUSessions, b->numPDUSessions);
_E1_EQ_CHECK_INT(a->numPDUSessionsMod, b->numPDUSessionsMod);
// PLMN
_E1_EQ_CHECK_INT(a->servingPLMNid.mcc, b->servingPLMNid.mcc);
_E1_EQ_CHECK_INT(a->servingPLMNid.mnc, b->servingPLMNid.mnc);
_E1_EQ_CHECK_INT(a->servingPLMNid.mnc_digit_length, b->servingPLMNid.mnc_digit_length);
// Security Keys
_E1_EQ_CHECK_STR(a->encryptionKey, b->encryptionKey);
_E1_EQ_CHECK_STR(a->integrityProtectionKey, b->integrityProtectionKey);
// PDU Sessions
if (a->numPDUSessions != b->numPDUSessions)
return false;
for (int i = 0; i < a->numPDUSessions; i++)
if (!eq_pdu_session_item(&a->pduSession[i], &b->pduSession[i]))
return false;
if (a->numPDUSessionsMod != b->numPDUSessionsMod)
return false;
for (int i = 0; i < a->numPDUSessionsMod; i++)
if (!eq_pdu_session_item(&a->pduSessionMod[i], &b->pduSessionMod[i]))
return false;
return true;
}
/* ======================================
* E1AP Bearer Context Setup Response
* ====================================== */
/* PDU Session Resource Setup Item */
/**
* @brief Decode an item of the E1 PDU Session Resource Setup List (9.3.3.5 of 3GPP TS 38.463)
*/
static bool e1_decode_pdu_session_setup_item(pdu_session_setup_t *pduSetup, E1AP_PDU_Session_Resource_Setup_Item_t *in)
{
// PDU Session ID
pduSetup->id = in->pDU_Session_ID;
pduSetup->numDRBSetup = in->dRB_Setup_List_NG_RAN.list.count;
// NG DL UP Transport Layer Information (M)
E1AP_UP_TNL_Information_t *DL_UP_TNL_Info = &in->nG_DL_UP_TNL_Information;
if (DL_UP_TNL_Info->choice.gTPTunnel) {
_E1_EQ_CHECK_INT(DL_UP_TNL_Info->present, E1AP_UP_TNL_Information_PR_gTPTunnel);
BIT_STRING_TO_TRANSPORT_LAYER_ADDRESS_IPv4(&DL_UP_TNL_Info->choice.gTPTunnel->transportLayerAddress, pduSetup->tlAddress);
OCTET_STRING_TO_INT32(&DL_UP_TNL_Info->choice.gTPTunnel->gTP_TEID, pduSetup->teId);
}
// DRB Setup List (1..<maxnoofDRBs>)
for (int j = 0; j < in->dRB_Setup_List_NG_RAN.list.count; j++) {
DRB_nGRAN_setup_t *drbSetup = pduSetup->DRBnGRanList + j;
E1AP_DRB_Setup_Item_NG_RAN_t *drb = in->dRB_Setup_List_NG_RAN.list.array[j];
// DRB ID (M)
drbSetup->id = drb->dRB_ID;
// UL UP Parameters (M)
drbSetup->numUpParam = drb->uL_UP_Transport_Parameters.list.count;
for (int k = 0; k < drb->uL_UP_Transport_Parameters.list.count; k++) {
up_params_t *UL_UP_param = drbSetup->UpParamList + k;
// UP Parameters List (1..<maxnoofUPParameters>)
E1AP_UP_Parameters_Item_t *UL_UP_item = drb->uL_UP_Transport_Parameters.list.array[k];
// UP Transport Layer Information (M)
DevAssert(UL_UP_item->uP_TNL_Information.present == E1AP_UP_TNL_Information_PR_gTPTunnel);
// GTP Tunnel (M)
E1AP_GTPTunnel_t *gTPTunnel = UL_UP_item->uP_TNL_Information.choice.gTPTunnel;
AssertError(gTPTunnel != NULL, return false, "gTPTunnel information in required in UP Transport Layer Information\n");
if (gTPTunnel) {
BIT_STRING_TO_TRANSPORT_LAYER_ADDRESS_IPv4(&gTPTunnel->transportLayerAddress, UL_UP_param->tlAddress);
OCTET_STRING_TO_INT32(&gTPTunnel->gTP_TEID, UL_UP_param->teId);
} else {
}
// Cell Group ID (M)
UL_UP_param->cell_group_id = UL_UP_item->cell_Group_ID;
}
// Flow Setup List (M)
drbSetup->numQosFlowSetup = drb->flow_Setup_List.list.count;
for (int q = 0; q < drb->flow_Setup_List.list.count; q++) {
qos_flow_setup_t *qosflowSetup = &drbSetup->qosFlows[q];
E1AP_QoS_Flow_Item_t *in_qosflowSetup = drb->flow_Setup_List.list.array[q];
qosflowSetup->qfi = in_qosflowSetup->qoS_Flow_Identifier;
}
}
return true;
}
/**
* @brief Encode an item of the E1 PDU Session Resource Setup List (9.3.3.5 of 3GPP TS 38.463)
*/
static bool e1_encode_pdu_session_setup_item(E1AP_PDU_Session_Resource_Setup_Item_t *item, const pdu_session_setup_t *in)
{
// PDU Session ID (M)
item->pDU_Session_ID = in->id;
// NG DL UP Transport Layer Information (M)
item->nG_DL_UP_TNL_Information.present = E1AP_UP_TNL_Information_PR_gTPTunnel;
asn1cCalloc(item->nG_DL_UP_TNL_Information.choice.gTPTunnel, gTPTunnel);
TRANSPORT_LAYER_ADDRESS_IPv4_TO_BIT_STRING(in->tlAddress, &gTPTunnel->transportLayerAddress);
INT32_TO_OCTET_STRING(in->teId, &gTPTunnel->gTP_TEID);
// DRB Setup List (1..<maxnoofDRBs>)
for (const DRB_nGRAN_setup_t *j = in->DRBnGRanList; j < in->DRBnGRanList + in->numDRBSetup; j++) {
asn1cSequenceAdd(item->dRB_Setup_List_NG_RAN.list, E1AP_DRB_Setup_Item_NG_RAN_t, ieC3_1_1);
// DRB ID (M)
ieC3_1_1->dRB_ID = j->id;
// UL UP Parameters (M)
for (const up_params_t *k = j->UpParamList; k < j->UpParamList + j->numUpParam; k++) {
asn1cSequenceAdd(ieC3_1_1->uL_UP_Transport_Parameters.list, E1AP_UP_Parameters_Item_t, ieC3_1_1_1);
ieC3_1_1_1->uP_TNL_Information.present = E1AP_UP_TNL_Information_PR_gTPTunnel;
asn1cCalloc(ieC3_1_1_1->uP_TNL_Information.choice.gTPTunnel, gTPTunnel);
TRANSPORT_LAYER_ADDRESS_IPv4_TO_BIT_STRING(k->tlAddress, &gTPTunnel->transportLayerAddress);
INT32_TO_OCTET_STRING(k->teId, &gTPTunnel->gTP_TEID);
}
// Flow Setup List(M)
for (const qos_flow_setup_t *k = j->qosFlows; k < j->qosFlows + j->numQosFlowSetup; k++) {
asn1cSequenceAdd(ieC3_1_1->flow_Setup_List.list, E1AP_QoS_Flow_Item_t, ieC3_1_1_1);
ieC3_1_1_1->qoS_Flow_Identifier = k->qfi;
}
}
// DRB Failed List (O)
if (in->numDRBFailed > 0)
item->dRB_Failed_List_NG_RAN = calloc_or_fail(1, sizeof(*item->dRB_Failed_List_NG_RAN));
// DRB Failed Item
for (const DRB_nGRAN_failed_t *j = in->DRBnGRanFailedList; j < in->DRBnGRanFailedList + in->numDRBFailed; j++) {
asn1cSequenceAdd(item->dRB_Failed_List_NG_RAN->list, E1AP_DRB_Failed_Item_NG_RAN_t, ieC3_1_1);
// DRB ID (M)
ieC3_1_1->dRB_ID = j->id;
// Cause (M)
ieC3_1_1->cause.present = j->cause_type;
switch (ieC3_1_1->cause.present) {
case E1AP_Cause_PR_radioNetwork:
ieC3_1_1->cause.choice.radioNetwork = j->cause;
break;
case E1AP_Cause_PR_transport:
ieC3_1_1->cause.choice.transport = j->cause;
break;
case E1AP_Cause_PR_protocol:
ieC3_1_1->cause.choice.protocol = j->cause;
break;
case E1AP_Cause_PR_misc:
ieC3_1_1->cause.choice.misc = j->cause;
break;
default:
PRINT_ERROR("DRB setup failure cause out of expected range\n");
break;
}
}
return true;
}
/**
* @brief Encode E1 Bearer Context Setup Response (9.2.2.2 of 3GPP TS 38.463)
*/
E1AP_E1AP_PDU_t *encode_E1_bearer_context_setup_response(const e1ap_bearer_setup_resp_t *in)
{
E1AP_E1AP_PDU_t *pdu = calloc_or_fail(1, sizeof(*pdu));
// PDU Type
pdu->present = E1AP_E1AP_PDU_PR_successfulOutcome;
asn1cCalloc(pdu->choice.successfulOutcome, msg);
msg->procedureCode = E1AP_ProcedureCode_id_bearerContextSetup;
msg->criticality = E1AP_Criticality_reject;
msg->value.present = E1AP_SuccessfulOutcome__value_PR_BearerContextSetupResponse;
E1AP_BearerContextSetupResponse_t *out = &pdu->choice.successfulOutcome->value.choice.BearerContextSetupResponse;
// gNB-CU-CP UE E1AP ID (M)
asn1cSequenceAdd(out->protocolIEs.list, E1AP_BearerContextSetupResponseIEs_t, ieC1);
ieC1->id = E1AP_ProtocolIE_ID_id_gNB_CU_CP_UE_E1AP_ID;
ieC1->criticality = E1AP_Criticality_reject;
ieC1->value.present = E1AP_BearerContextSetupResponseIEs__value_PR_GNB_CU_CP_UE_E1AP_ID;
ieC1->value.choice.GNB_CU_CP_UE_E1AP_ID = in->gNB_cu_cp_ue_id;
// gNB-CU-UP UE E1AP ID (M)
asn1cSequenceAdd(out->protocolIEs.list, E1AP_BearerContextSetupResponseIEs_t, ieC2);
ieC2->id = E1AP_ProtocolIE_ID_id_gNB_CU_UP_UE_E1AP_ID;
ieC2->criticality = E1AP_Criticality_reject;
ieC2->value.present = E1AP_BearerContextSetupResponseIEs__value_PR_GNB_CU_UP_UE_E1AP_ID;
ieC2->value.choice.GNB_CU_CP_UE_E1AP_ID = in->gNB_cu_up_ue_id;
// Message Type (M)
asn1cSequenceAdd(out->protocolIEs.list, E1AP_BearerContextSetupResponseIEs_t, ieC3);
ieC3->id = E1AP_ProtocolIE_ID_id_System_BearerContextSetupResponse;
ieC3->criticality = E1AP_Criticality_reject;
ieC3->value.present = E1AP_BearerContextSetupResponseIEs__value_PR_System_BearerContextSetupResponse;
// CHOICE System: default NG-RAN (M)
ieC3->value.choice.System_BearerContextSetupResponse.present =
E1AP_System_BearerContextSetupResponse_PR_nG_RAN_BearerContextSetupResponse;
E1AP_ProtocolIE_Container_4932P22_t *msgNGRAN_list = calloc_or_fail(1, sizeof(*msgNGRAN_list));
ieC3->value.choice.System_BearerContextSetupResponse.choice.nG_RAN_BearerContextSetupResponse =
(struct E1AP_ProtocolIE_Container *)msgNGRAN_list;
asn1cSequenceAdd(msgNGRAN_list->list, E1AP_NG_RAN_BearerContextSetupResponse_t, msgNGRAN);
msgNGRAN->id = E1AP_ProtocolIE_ID_id_PDU_Session_Resource_Setup_List;
msgNGRAN->criticality = E1AP_Criticality_reject;
msgNGRAN->value.present = E1AP_NG_RAN_BearerContextSetupResponse__value_PR_PDU_Session_Resource_Setup_List;
E1AP_PDU_Session_Resource_Setup_List_t *pduSetup = &msgNGRAN->value.choice.PDU_Session_Resource_Setup_List;
for (const pdu_session_setup_t *i = in->pduSession; i < in->pduSession + in->numPDUSessions; i++) {
asn1cSequenceAdd(pduSetup->list, E1AP_PDU_Session_Resource_Setup_Item_t, ieC3_1);
e1_encode_pdu_session_setup_item(ieC3_1, i);
}
return pdu;
}
/**
* @brief Decode E1 Bearer Context Setup Response (9.2.2.2 of 3GPP TS 38.463)
*/
bool decode_E1_bearer_context_setup_response(const E1AP_E1AP_PDU_t *pdu, e1ap_bearer_setup_resp_t *out)
{
// Check message type
_E1_EQ_CHECK_INT(pdu->present, E1AP_E1AP_PDU_PR_successfulOutcome);
_E1_EQ_CHECK_INT(pdu->choice.successfulOutcome->procedureCode, E1AP_ProcedureCode_id_bearerContextSetup);
_E1_EQ_CHECK_INT(pdu->choice.successfulOutcome->criticality, E1AP_Criticality_reject);
_E1_EQ_CHECK_INT(pdu->choice.successfulOutcome->value.present, E1AP_SuccessfulOutcome__value_PR_BearerContextSetupResponse);
const E1AP_BearerContextSetupResponse_t *in = &pdu->choice.successfulOutcome->value.choice.BearerContextSetupResponse;
E1AP_BearerContextSetupResponseIEs_t *ie;
// Check mandatory IEs first
E1AP_LIB_FIND_IE(E1AP_BearerContextSetupResponseIEs_t, ie, in, E1AP_ProtocolIE_ID_id_gNB_CU_CP_UE_E1AP_ID, true);
E1AP_LIB_FIND_IE(E1AP_BearerContextSetupResponseIEs_t, ie, in, E1AP_ProtocolIE_ID_id_gNB_CU_UP_UE_E1AP_ID, true);
E1AP_LIB_FIND_IE(E1AP_BearerContextSetupResponseIEs_t, ie, in, E1AP_ProtocolIE_ID_id_System_BearerContextSetupResponse, true);
// Loop over all IEs
for (int i = 0; i < in->protocolIEs.list.count; i++) {
ie = in->protocolIEs.list.array[i];
switch (ie->id) {
case E1AP_ProtocolIE_ID_id_gNB_CU_CP_UE_E1AP_ID:
_E1_EQ_CHECK_INT(ie->value.present, E1AP_BearerContextSetupResponseIEs__value_PR_GNB_CU_CP_UE_E1AP_ID);
out->gNB_cu_cp_ue_id = ie->value.choice.GNB_CU_CP_UE_E1AP_ID;
break;
case E1AP_ProtocolIE_ID_id_gNB_CU_UP_UE_E1AP_ID:
_E1_EQ_CHECK_INT(ie->value.present, E1AP_BearerContextSetupResponseIEs__value_PR_GNB_CU_UP_UE_E1AP_ID);
out->gNB_cu_up_ue_id = ie->value.choice.GNB_CU_UP_UE_E1AP_ID;
break;
case E1AP_ProtocolIE_ID_id_System_BearerContextSetupResponse:
_E1_EQ_CHECK_INT(ie->value.present, E1AP_BearerContextSetupResponseIEs__value_PR_System_BearerContextSetupResponse);
switch (ie->value.choice.System_BearerContextSetupResponse.present) {
case E1AP_System_BearerContextSetupResponse_PR_nG_RAN_BearerContextSetupResponse: {
E1AP_ProtocolIE_Container_4932P22_t *msgNGRAN_list =
(E1AP_ProtocolIE_Container_4932P22_t *)
ie->value.choice.System_BearerContextSetupResponse.choice.nG_RAN_BearerContextSetupResponse;
_E1_EQ_CHECK_INT(msgNGRAN_list->list.count, 1);
E1AP_NG_RAN_BearerContextSetupResponse_t *msgNGRAN = msgNGRAN_list->list.array[0];
_E1_EQ_CHECK_INT(msgNGRAN->id, E1AP_ProtocolIE_ID_id_PDU_Session_Resource_Setup_List);
_E1_EQ_CHECK_INT(msgNGRAN->value.present,
E1AP_NG_RAN_BearerContextSetupResponse__value_PR_PDU_Session_Resource_Setup_List);
E1AP_PDU_Session_Resource_Setup_List_t *pduSetupList = &msgNGRAN->value.choice.PDU_Session_Resource_Setup_List;
out->numPDUSessions = pduSetupList->list.count;
for (int i = 0; i < pduSetupList->list.count; i++) {
pdu_session_setup_t *pduSetup = out->pduSession + i;
E1AP_PDU_Session_Resource_Setup_Item_t *pdu_session = pduSetupList->list.array[i];
e1_decode_pdu_session_setup_item(pduSetup, pdu_session);
}
} break;
case E1AP_System_BearerContextSetupResponse_PR_e_UTRAN_BearerContextSetupResponse:
PRINT_ERROR("DRB Setup List E-UTRAN not supported in E1 Setup Response\n");
return false;
break;
default:
PRINT_ERROR("Unknown DRB Setup List in E1 Setup Response\n");
return false;
break;
}
break;
default:
PRINT_ERROR("Handle for this IE is not implemented (or) invalid IE detected\n");
return false;
break;
}
}
return true;
}
/**
* @brief Deep copy function for E1 BEARER CONTEXT SETUP RESPONSE
*/
e1ap_bearer_setup_resp_t cp_bearer_context_setup_response(const e1ap_bearer_setup_resp_t *msg)
{
e1ap_bearer_setup_resp_t cp = {0};
// Copy basic fields
cp = *msg;
// Copy PDU Sessions Setup
for (int i = 0; i < msg->numPDUSessions; i++) {
cp.pduSession[i] = msg->pduSession[i];
// Copy DRB Setup
for (int j = 0; j < msg->pduSession[i].numDRBSetup; j++) {
cp.pduSession[i].DRBnGRanList[j] = msg->pduSession[i].DRBnGRanList[j];
for (int k = 0; k < msg->pduSession[i].DRBnGRanList[j].numQosFlowSetup; k++) {
cp.pduSession[i].DRBnGRanList[j].qosFlows[k] = msg->pduSession[i].DRBnGRanList[j].qosFlows[k];
}
}
cp.pduSession[i].numDRBFailed = msg->pduSession[i].numDRBFailed;
// Copy DRB Failed
for (int j = 0; j < msg->pduSession[i].numDRBFailed; j++) {
cp.pduSession[i].DRBnGRanFailedList[j] = msg->pduSession[i].DRBnGRanFailedList[j];
}
}
return cp;
}
/**
* @brief E1AP Bearer Context Setup Response equality check
*/
bool eq_bearer_context_setup_response(const e1ap_bearer_setup_resp_t *a, const e1ap_bearer_setup_resp_t *b)
{
// Check basic members
_E1_EQ_CHECK_INT(a->gNB_cu_cp_ue_id, b->gNB_cu_cp_ue_id);
_E1_EQ_CHECK_INT(a->gNB_cu_up_ue_id, b->gNB_cu_up_ue_id);
_E1_EQ_CHECK_INT(a->numPDUSessions, b->numPDUSessions);
// Check PDU Sessions Setup
if (a->numPDUSessions != b->numPDUSessions)
return false;
for (int i = 0; i < a->numPDUSessions; i++) {
const pdu_session_setup_t *ps_a = &a->pduSession[i];
const pdu_session_setup_t *ps_b = &b->pduSession[i];
_E1_EQ_CHECK_LONG(ps_a->id, ps_b->id);
_E1_EQ_CHECK_INT(ps_a->tlAddress, ps_b->tlAddress);
_E1_EQ_CHECK_LONG(ps_a->teId, ps_b->teId);
_E1_EQ_CHECK_INT(ps_a->numDRBSetup, ps_b->numDRBSetup);
_E1_EQ_CHECK_INT(ps_a->numDRBFailed, ps_b->numDRBFailed);
// Check DRB Setup
for (int j = 0; j < ps_a->numDRBSetup; j++) {
const DRB_nGRAN_setup_t *drb_a = &ps_a->DRBnGRanList[j];
const DRB_nGRAN_setup_t *drb_b = &ps_b->DRBnGRanList[j];
_E1_EQ_CHECK_LONG(drb_a->id, drb_b->id);
_E1_EQ_CHECK_INT(drb_a->numUpParam, drb_b->numUpParam);
_E1_EQ_CHECK_INT(drb_a->numQosFlowSetup, drb_b->numQosFlowSetup);
}
// Check DRB Failed
for (int j = 0; j < ps_a->numDRBFailed; j++) {
const DRB_nGRAN_failed_t *drbf_a = &ps_a->DRBnGRanFailedList[j];
const DRB_nGRAN_failed_t *drbf_b = &ps_b->DRBnGRanFailedList[j];
_E1_EQ_CHECK_LONG(drbf_a->id, drbf_b->id);
_E1_EQ_CHECK_LONG(drbf_a->cause_type, drbf_b->cause_type);
_E1_EQ_CHECK_LONG(drbf_a->cause, drbf_b->cause);
}
}
return true;
}
/**
* @brief E1AP Bearer Context Setup Response memory management
*/
void free_e1ap_context_setup_response(const e1ap_bearer_setup_resp_t *msg)
{
// Do nothing (no dynamic allocation)
}
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