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/*
* Copyright (C) 2019,2020 by Sukchan Lee <acetcom@gmail.com>
*
* This file is part of Open5GS.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "test-common.h"
void testngap_recv(test_ue_t *test_ue, ogs_pkbuf_t *pkbuf)
{
int rv;
ogs_ngap_message_t message;
NGAP_NGAP_PDU_t *pdu = NULL;
NGAP_InitiatingMessage_t *initiatingMessage = NULL;
NGAP_SuccessfulOutcome_t *successfulOutcome = NULL;
NGAP_UnsuccessfulOutcome_t *unsuccessfulOutcome = NULL;
ogs_assert(test_ue);
ogs_assert(pkbuf);
rv = ogs_ngap_decode(&message, pkbuf);
ogs_assert(rv == OGS_OK);
pdu = &message;
ogs_assert(pdu);
switch (pdu->present) {
case NGAP_NGAP_PDU_PR_initiatingMessage:
initiatingMessage = pdu->choice.initiatingMessage;
ogs_assert(initiatingMessage);
if (test_ue)
test_ue->ngap_procedure_code = initiatingMessage->procedureCode;
switch (initiatingMessage->procedureCode) {
case NGAP_ProcedureCode_id_DownlinkNASTransport:
testngap_handle_downlink_nas_transport(test_ue, pdu);
break;
case NGAP_ProcedureCode_id_InitialContextSetup:
testngap_handle_initial_context_setup_request(test_ue, pdu);
break;
case NGAP_ProcedureCode_id_UEContextRelease:
testngap_handle_ue_release_context_command(test_ue, pdu);
break;
case NGAP_ProcedureCode_id_PDUSessionResourceSetup:
testngap_handle_pdu_session_resource_setup_request(test_ue, pdu);
break;
case NGAP_ProcedureCode_id_PDUSessionResourceModify:
testngap_handle_pdu_session_resource_modify_request(test_ue, pdu);
break;
case NGAP_ProcedureCode_id_PDUSessionResourceRelease:
testngap_handle_pdu_session_resource_release_command(test_ue, pdu);
break;
case NGAP_ProcedureCode_id_DownlinkRANConfigurationTransfer:
break;
case NGAP_ProcedureCode_id_HandoverResourceAllocation:
testngap_handle_handover_request(test_ue, pdu);
break;
case NGAP_ProcedureCode_id_DownlinkRANStatusTransfer:
testngap_handle_downlink_ran_status_transfer(test_ue, pdu);
break;
case NGAP_ProcedureCode_id_ErrorIndication:
case NGAP_ProcedureCode_id_Paging:
/* Nothing */
break;
default:
ogs_error("Not implemented(choice:%d, proc:%d)",
pdu->present, (int)initiatingMessage->procedureCode);
break;
}
break;
case NGAP_NGAP_PDU_PR_successfulOutcome :
successfulOutcome = pdu->choice.successfulOutcome;
ogs_assert(successfulOutcome);
if (test_ue)
test_ue->ngap_procedure_code = successfulOutcome->procedureCode;
switch (successfulOutcome->procedureCode) {
case NGAP_ProcedureCode_id_NGSetup:
testngap_handle_ng_setup_response(test_ue, pdu);
break;
case NGAP_ProcedureCode_id_PathSwitchRequest:
break;
case NGAP_ProcedureCode_id_HandoverPreparation:
testngap_handle_handover_command(test_ue, pdu);
break;
case NGAP_ProcedureCode_id_HandoverCancel:
testngap_handle_handover_cancel_ack(test_ue, pdu);
break;
case NGAP_ProcedureCode_id_NGReset:
break;
default:
ogs_error("Not implemented(choice:%d, proc:%d)",
pdu->present, (int)successfulOutcome->procedureCode);
break;
}
break;
case NGAP_NGAP_PDU_PR_unsuccessfulOutcome :
unsuccessfulOutcome = pdu->choice.unsuccessfulOutcome;
ogs_assert(unsuccessfulOutcome);
if (test_ue)
test_ue->ngap_procedure_code = unsuccessfulOutcome->procedureCode;
switch (unsuccessfulOutcome->procedureCode) {
case NGAP_ProcedureCode_id_NGSetup:
break;
case NGAP_ProcedureCode_id_HandoverPreparation:
testngap_handle_handover_preparation_failure(test_ue, pdu);
break;
default:
ogs_error("Not implemented(choice:%d, proc:%d)",
pdu->present, (int)unsuccessfulOutcome->procedureCode);
break;
}
break;
default:
ogs_error("Not implemented(choice:%d)", pdu->present);
break;
}
ogs_ngap_free(&message);
ogs_pkbuf_free(pkbuf);
}
void testngap_send_to_nas(test_ue_t *test_ue, NGAP_NAS_PDU_t *nasPdu)
{
ogs_nas_5gs_security_header_t *sh = NULL;
ogs_nas_security_header_type_t security_header_type;
ogs_nas_5gmm_header_t *h = NULL;
ogs_pkbuf_t *nasbuf = NULL;
ogs_assert(test_ue);
ogs_assert(nasPdu);
/* The Packet Buffer(pkbuf_t) for NAS message MUST make a HEADROOM.
* When calculating AES_CMAC, we need to use the headroom of the packet. */
nasbuf = ogs_pkbuf_alloc(NULL, OGS_NAS_HEADROOM+nasPdu->size);
ogs_assert(nasbuf);
ogs_pkbuf_reserve(nasbuf, OGS_NAS_HEADROOM);
ogs_pkbuf_put_data(nasbuf, nasPdu->buf, nasPdu->size);
sh = (ogs_nas_5gs_security_header_t *)nasbuf->data;
ogs_assert(sh);
memset(&security_header_type, 0, sizeof(ogs_nas_security_header_type_t));
switch(sh->security_header_type) {
case OGS_NAS_SECURITY_HEADER_PLAIN_NAS_MESSAGE:
break;
case OGS_NAS_SECURITY_HEADER_INTEGRITY_PROTECTED:
security_header_type.integrity_protected = 1;
ogs_pkbuf_pull(nasbuf, 7);
break;
case OGS_NAS_SECURITY_HEADER_INTEGRITY_PROTECTED_AND_CIPHERED:
security_header_type.integrity_protected = 1;
security_header_type.ciphered = 1;
ogs_pkbuf_pull(nasbuf, 7);
break;
case OGS_NAS_SECURITY_HEADER_INTEGRITY_PROTECTED_AND_NEW_SECURITY_CONTEXT:
security_header_type.integrity_protected = 1;
security_header_type.new_security_context = 1;
ogs_pkbuf_pull(nasbuf, 7);
break;
case OGS_NAS_SECURITY_HEADER_INTEGRITY_PROTECTED_AND_CIPHTERD_WITH_NEW_INTEGRITY_CONTEXT:
security_header_type.integrity_protected = 1;
security_header_type.ciphered = 1;
security_header_type.new_security_context = 1;
ogs_pkbuf_pull(nasbuf, 7);
break;
default:
ogs_error("Not implemented(security header type:0x%x)",
sh->security_header_type);
ogs_assert_if_reached();
}
h = (ogs_nas_5gmm_header_t *)nasbuf->data;
ogs_assert(h);
if (sh->security_header_type ==
OGS_NAS_SECURITY_HEADER_INTEGRITY_PROTECTED_AND_NEW_SECURITY_CONTEXT &&
h->message_type == OGS_NAS_5GS_SECURITY_MODE_COMMAND) {
ogs_nas_5gs_message_t message;
int rv;
rv = ogs_nas_5gmm_decode(&message, nasbuf);
ogs_assert(rv == OGS_OK);
testgmm_handle_security_mode_command(test_ue,
&message.gmm.security_mode_command);
}
if (test_nas_5gs_security_decode(test_ue,
security_header_type, nasbuf) != OGS_OK) {
ogs_error("nas_eps_security_decode failed()");
ogs_assert_if_reached();
}
if (h->extended_protocol_discriminator ==
OGS_NAS_EXTENDED_PROTOCOL_DISCRIMINATOR_5GMM) {
testgmm_recv(test_ue, nasbuf);
} else {
ogs_error("Unknown NAS Protocol discriminator 0x%02x",
h->extended_protocol_discriminator);
ogs_assert_if_reached();
}
}
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