forked from acouzens/open5gs
111 lines
3.5 KiB
C
111 lines
3.5 KiB
C
/*
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* Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
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* Copyright (C) 2022 by sysmocom - s.f.m.c. GmbH <info@sysmocom.de>
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*
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* This file is part of Open5GS.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#if !defined(OGS_CORE_INSIDE) && !defined(OGS_CORE_COMPILATION)
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#error "This header cannot be included directly."
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#endif
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#ifndef OGS_TLV_H
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#define OGS_TLV_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define OGS_TLV_MODE_T1_L1 1
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#define OGS_TLV_MODE_T1_L2 2
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#define OGS_TLV_MODE_T1_L2_I1 3
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#define OGS_TLV_MODE_T2_L2 4
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#define OGS_TLV_MODE_T1 5
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/* ogs_tlv_t struncture */
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typedef struct ogs_tlv_s
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{
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/* for tlv management */
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struct ogs_tlv_s *head;
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struct ogs_tlv_s *tail; /* this is used only for head ogs_tlv_t */
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struct ogs_tlv_s *next;
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struct ogs_tlv_s *parent;
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struct ogs_tlv_s *embedded;
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/* tlv mode: defines exact meaning and (conditional) use of fields in next section */
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uint8_t mode;
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/* tlv basic element */
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uint32_t type;
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uint32_t length;
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uint8_t instance;
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void *value;
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/* can be needed in encoding ogs_tlv_t*/
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bool buff_allocated;
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uint32_t buff_len;
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unsigned char *buff_ptr;
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unsigned char *buff;
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} ogs_tlv_t;
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#define ogs_tlv_type(pTlv) pTlv->type
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#define ogs_tlv_length(pTlv) pTlv->length
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#define ogs_tlv_instance(pTlv) pTlv->instance
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#define ogs_tlv_value(pTlv) pTlv->value
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/* ogs_tlv_t pool related functions */
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ogs_tlv_t *ogs_tlv_get(void);
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void ogs_tlv_free(ogs_tlv_t *tlv);
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void ogs_tlv_free_all(ogs_tlv_t *root);
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void ogs_tlv_init(void);
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void ogs_tlv_final(void);
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uint32_t ogs_tlv_pool_avail(void);
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/* ogs_tlv_t encoding functions */
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ogs_tlv_t *ogs_tlv_add(ogs_tlv_t *head, uint8_t mode,
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uint32_t type, uint32_t length, uint8_t instance, void *value);
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ogs_tlv_t *ogs_tlv_copy(void *buff, uint32_t buff_len, uint8_t mode,
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uint32_t type, uint32_t length, uint8_t instance, void *value);
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ogs_tlv_t *ogs_tlv_embed(ogs_tlv_t *parent, uint8_t mode,
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uint32_t type, uint32_t length, uint8_t instance, void *value);
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uint32_t ogs_tlv_render(ogs_tlv_t *root, void *data, uint32_t length);
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/* ogs_tlv_t parsing functions */
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uint8_t *tlv_get_element(ogs_tlv_t *tlv, uint8_t *blk, uint8_t mode);
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uint8_t *tlv_get_element_fixed(ogs_tlv_t *tlv, uint8_t *blk, uint8_t mode, uint32_t fixed_length);
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ogs_tlv_t *ogs_tlv_parse_block(uint32_t length, void *data, uint8_t mode);
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ogs_tlv_t *ogs_tlv_parse_embedded_block(ogs_tlv_t *tlv, uint8_t mode);
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/* tlv operation-related function */
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ogs_tlv_t *ogs_tlv_find(ogs_tlv_t *root, uint32_t type);
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ogs_tlv_t *ogs_tlv_find_root(ogs_tlv_t *tlv);
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uint32_t ogs_tlv_calc_length(ogs_tlv_t *tlv);
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uint32_t ogs_tlv_calc_count(ogs_tlv_t *tlv);
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uint8_t ogs_tlv_value_8(ogs_tlv_t *tlv);
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uint16_t ogs_tlv_value_16(ogs_tlv_t *tlv);
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uint32_t ogs_tlv_value_32(ogs_tlv_t *tlv);
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#ifdef __cplusplus
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}
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#endif
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#endif /* OGS_OGS_TLV_H */
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