maki/openairinterface5g
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Implementation E1 Setup Failure (8.2.3.3 of 3GPP TS 38.463)

Browse Source 
- CU-CP replying to the CU-UP with a Setup Failure message in case of unsuccessfull E1 Setup Request
- message is decoded by the CU-UP, and stops the process
This commit is contained in:
Guido Casati
2024-01-25 17:10:48 +01:00
committed by Robert Schmidt
parent 47c069347d
commit 7faabc6b45
5 changed files with 67 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files
openair2/E1AP/e1ap.c
+34 -2
View File
@@ -257,25 +257,36 @@ void e1ap_send_SETUP_RESPONSE(sctp_assoc_t assoc_id, const e1ap_setup_resp_t *e1
e1ap_encode_send(CPtype, assoc_id, &pdu, 0, __func__);
}
/**
* @brief E1 Setup Failure ASN1 messager builder
* @ref 9.2.1.6 GNB-CU-UP E1 SETUP FAILURE of 3GPP TS 38.463
*/
static void fill_SETUP_FAILURE(long transac_id, E1AP_E1AP_PDU_t *pdu)
{
/* Create */
/* 0. pdu Type */
pdu->present = E1AP_E1AP_PDU_PR_unsuccessfulOutcome;
asn1cCalloc(pdu->choice.unsuccessfulOutcome, initMsg);
/* mandatory */
/**
* Message Type IE
* - procedureCode (integer)
* - Type of Message (choice)
* @ref clause 9.3.1.1 of 3GPP TS 38.463
*/
initMsg->procedureCode = E1AP_ProcedureCode_id_gNB_CU_UP_E1Setup;
initMsg->criticality = E1AP_Criticality_reject;
initMsg->value.present = E1AP_UnsuccessfulOutcome__value_PR_GNB_CU_UP_E1SetupFailure;
E1AP_GNB_CU_UP_E1SetupFailure_t *out = &pdu->choice.unsuccessfulOutcome->value.choice.GNB_CU_UP_E1SetupFailure;
/* mandatory */
/* c1. Transaction ID (integer value) */
/* c1. Transaction ID (integer value), clause 9.3.1.53 of 3GPP TS 38.463 */
asn1cSequenceAdd(out->protocolIEs.list, E1AP_GNB_CU_UP_E1SetupFailureIEs_t, ieC1);
ieC1->id = E1AP_ProtocolIE_ID_id_TransactionID;
ieC1->criticality = E1AP_Criticality_reject;
ieC1->value.present = E1AP_GNB_CU_UP_E1SetupFailureIEs__value_PR_TransactionID;
ieC1->value.choice.TransactionID = transac_id;
/* mandatory */
/* c2. cause (integer value) */
/* c2. cause (integer value), clause 9.3.1.2 of 3GPP TS 38.463 */
asn1cSequenceAdd(out->protocolIEs.list, E1AP_GNB_CU_UP_E1SetupFailureIEs_t, ieC2);
ieC2->id = E1AP_ProtocolIE_ID_id_Cause;
ieC2->criticality = E1AP_Criticality_ignore;
@@ -284,8 +295,12 @@ static void fill_SETUP_FAILURE(long transac_id, E1AP_E1AP_PDU_t *pdu)
ieC2->value.choice.Cause.choice.radioNetwork = E1AP_CauseRadioNetwork_unspecified;
}
/**
* @brief E1 Setup Failure ASN1 messager encoder
*/
void e1apCUCP_send_SETUP_FAILURE(sctp_assoc_t assoc_id, long transac_id)
{
LOG_D(E1AP, "CU-CP: Encoding E1AP Setup Failure for transac_id %ld...\n", transac_id);
E1AP_E1AP_PDU_t pdu = {0};
fill_SETUP_FAILURE(transac_id, &pdu);
e1ap_encode_send(CPtype, assoc_id, &pdu, 0, __func__);
@@ -404,18 +419,31 @@ int e1apCUUP_handle_SETUP_RESPONSE(sctp_assoc_t assoc_id, e1ap_upcp_inst_t *inst
return 0;
}
/**
* @brief E1 Setup Failure ASN1 messager decoder on CU-UP
*/
int e1apCUUP_handle_SETUP_FAILURE(sctp_assoc_t assoc_id, e1ap_upcp_inst_t *inst, const E1AP_E1AP_PDU_t *pdu)
{
LOG_D(E1AP, "CU-UP: Decoding E1AP Setup Failure...\n");
E1AP_GNB_CU_UP_E1SetupFailureIEs_t *ie;
DevAssert(pdu != NULL);
E1AP_GNB_CU_UP_E1SetupFailure_t *in = &pdu->choice.unsuccessfulOutcome->value.choice.GNB_CU_UP_E1SetupFailure;
/* Transaction ID */
F1AP_FIND_PROTOCOLIE_BY_ID(E1AP_GNB_CU_UP_E1SetupFailureIEs_t, ie, in,
E1AP_ProtocolIE_ID_id_TransactionID, true);
long transaction_id;
long old_transaction_id = inst->cuup.setupReq.transac_id;
transaction_id = ie->value.choice.TransactionID;
if (old_transaction_id != transaction_id)
LOG_E(E1AP, "Transaction IDs do not match %ld != %ld\n", old_transaction_id, transaction_id);
E1AP_free_transaction_identifier(transaction_id);
/* Cause */
F1AP_FIND_PROTOCOLIE_BY_ID(E1AP_GNB_CU_UP_E1SetupFailureIEs_t, ie, in,
E1AP_ProtocolIE_ID_id_Cause, true);
LOG_E(E1AP, "received E1 Setup Failure, please check the CU-CP output and the CU-UP parameters\n");
exit(1);
return 0;
}
@@ -1875,6 +1903,10 @@ void *E1AP_CUCP_task(void *arg) {
e1ap_send_SETUP_RESPONSE(assoc_id, &E1AP_SETUP_RESP(msg));
break;
case E1AP_SETUP_FAIL:
e1apCUCP_send_SETUP_FAILURE(assoc_id, E1AP_SETUP_FAIL(msg).transac_id);
break;
case E1AP_BEARER_CONTEXT_SETUP_REQ:
e1apCUCP_send_BEARER_CONTEXT_SETUP_REQUEST(assoc_id, &E1AP_BEARER_CONTEXT_SETUP_REQ(msg));
break;