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/*
* Copyright (C) 2019 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 "message.h"
ogs_pkbuf_t *ogs_asn_encode(const asn_TYPE_descriptor_t *td, void *sptr)
{
asn_enc_rval_t enc_ret = {0};
ogs_pkbuf_t *pkbuf = NULL;
ogs_assert(td);
ogs_assert(sptr);
pkbuf = ogs_pkbuf_alloc(NULL, OGS_MAX_SDU_LEN);
if (!pkbuf) {
ogs_error("ogs_pkbuf_alloc() failed");
return NULL;
}
ogs_pkbuf_put(pkbuf, OGS_MAX_SDU_LEN);
enc_ret = aper_encode_to_buffer(td, NULL,
sptr, pkbuf->data, OGS_MAX_SDU_LEN);
ogs_asn_free(td, sptr);
if (enc_ret.encoded < 0) {
ogs_error("Failed to encode ASN-PDU [%d]", (int)enc_ret.encoded);
ogs_pkbuf_free(pkbuf);
return NULL;
}
ogs_pkbuf_trim(pkbuf, ((enc_ret.encoded + 7) >> 3));
return pkbuf;
}
int ogs_asn_decode(const asn_TYPE_descriptor_t *td,
void *struct_ptr, size_t struct_size, ogs_pkbuf_t *pkbuf)
{
asn_dec_rval_t dec_ret = {0};
ogs_assert(td);
ogs_assert(struct_ptr);
ogs_assert(struct_size);
ogs_assert(pkbuf);
ogs_assert(pkbuf->data);
ogs_assert(pkbuf->len);
memset(struct_ptr, 0, struct_size);
dec_ret = aper_decode(NULL, td, (void **)&struct_ptr,
pkbuf->data, pkbuf->len, 0, 0);
if (dec_ret.code != RC_OK) {
ogs_warn("Failed to decode ASN-PDU [code:%d,consumed:%d]",
dec_ret.code, (int)dec_ret.consumed);
return OGS_ERROR;
}
return OGS_OK;
}
void ogs_asn_free(const asn_TYPE_descriptor_t *td, void *sptr)
{
ogs_assert(td);
ogs_assert(sptr);
ASN_STRUCT_FREE_CONTENTS_ONLY(*td, sptr);
}
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