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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"
int ogs_nas_5gs_encode_deregistration_request_from_ue(
ogs_pkbuf_t *pkbuf, ogs_nas_5gs_message_t *message);
ogs_pkbuf_t *test_nas_5gmm_encode(ogs_nas_5gs_message_t *message)
{
ogs_pkbuf_t *pkbuf = NULL;
int size = 0;
int encoded = 0;
ogs_assert(message);
/* The Packet Buffer(ogs_pkbuf_t) for NAS message MUST make a HEADROOM.
* When calculating AES_CMAC, we need to use the headroom of the packet. */
pkbuf = ogs_pkbuf_alloc(NULL, OGS_MAX_SDU_LEN);
ogs_assert(pkbuf);
ogs_pkbuf_reserve(pkbuf, OGS_NAS_HEADROOM);
ogs_pkbuf_put(pkbuf, OGS_MAX_SDU_LEN-OGS_NAS_HEADROOM);
size = sizeof(ogs_nas_5gmm_header_t);
ogs_assert(ogs_pkbuf_pull(pkbuf, size));
memcpy(pkbuf->data - size, &message->gmm.h, size);
encoded += size;
switch(message->gmm.h.message_type) {
case OGS_NAS_5GS_DEREGISTRATION_REQUEST_FROM_UE:
size = ogs_nas_5gs_encode_deregistration_request_from_ue(
pkbuf, message);
ogs_assert(size >= 0);
encoded += size;
break;
default:
ogs_error("Unknown message type (0x%x) or not implemented",
message->gmm.h.message_type);
ogs_pkbuf_free(pkbuf);
return NULL;
}
ogs_assert(ogs_pkbuf_push(pkbuf, encoded));
pkbuf->len = encoded;
return pkbuf;
}
ogs_pkbuf_t *test_nas_5gs_plain_encode(ogs_nas_5gs_message_t *message)
{
ogs_assert(message);
ogs_assert(message->gmm.h.extended_protocol_discriminator ==
message->gsm.h.extended_protocol_discriminator);
if (message->gmm.h.extended_protocol_discriminator ==
OGS_NAS_EXTENDED_PROTOCOL_DISCRIMINATOR_5GMM)
return test_nas_5gmm_encode(message);
ogs_error("Unknown discriminator [%d]",
message->gmm.h.extended_protocol_discriminator);
return NULL;
}
int ogs_nas_eps_encode_detach_request_from_ue(
ogs_pkbuf_t *pkbuf, ogs_nas_eps_message_t *message);
ogs_pkbuf_t *test_nas_emm_encode(ogs_nas_eps_message_t *message)
{
ogs_pkbuf_t *pkbuf = NULL;
int size = 0;
int encoded = 0;
ogs_assert(message);
/* The Packet Buffer(ogs_pkbuf_t) for NAS message MUST make a HEADROOM.
* When calculating AES_CMAC, we need to use the headroom of the packet. */
pkbuf = ogs_pkbuf_alloc(NULL, OGS_MAX_SDU_LEN);
ogs_assert(pkbuf);
ogs_pkbuf_reserve(pkbuf, OGS_NAS_HEADROOM);
ogs_pkbuf_put(pkbuf, OGS_MAX_SDU_LEN-OGS_NAS_HEADROOM);
size = sizeof(ogs_nas_emm_header_t);
ogs_assert(ogs_pkbuf_pull(pkbuf, size));
memcpy(pkbuf->data - size, &message->emm.h, size);
encoded += size;
switch(message->emm.h.message_type) {
case OGS_NAS_EPS_DETACH_REQUEST:
size = ogs_nas_eps_encode_detach_request_from_ue(pkbuf, message);
ogs_assert(size >= 0);
encoded += size;
break;
default:
ogs_error("Unknown message type (0x%x) or not implemented",
message->emm.h.message_type);
ogs_pkbuf_free(pkbuf);
return NULL;
}
ogs_assert(ogs_pkbuf_push(pkbuf, encoded));
pkbuf->len = encoded;
return pkbuf;
}
ogs_pkbuf_t *test_nas_eps_plain_encode(ogs_nas_eps_message_t *message)
{
ogs_assert(message);
ogs_assert(message->emm.h.protocol_discriminator ==
message->emm.h.protocol_discriminator);
if (message->emm.h.protocol_discriminator ==
OGS_NAS_PROTOCOL_DISCRIMINATOR_EMM)
return test_nas_emm_encode(message);
ogs_error("Unknown discriminator [%d]",
message->emm.h.protocol_discriminator);
return NULL;
}
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