65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
/*-
|
|
* Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
|
|
* Redistribution and modifications are permitted subject to BSD license.
|
|
*/
|
|
#ifndef _BER_DECODER_H_
|
|
#define _BER_DECODER_H_
|
|
|
|
#include <asn_application.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
struct asn_TYPE_descriptor_s; /* Forward declaration */
|
|
struct asn_codec_ctx_s; /* Forward declaration */
|
|
|
|
/*
|
|
* The BER decoder of any type.
|
|
* This function may be invoked directly from the application.
|
|
* The der_encode() function (der_encoder.h) is an opposite to ber_decode().
|
|
*/
|
|
asn_dec_rval_t ber_decode(struct asn_codec_ctx_s *opt_codec_ctx,
|
|
struct asn_TYPE_descriptor_s *type_descriptor,
|
|
void **struct_ptr, /* Pointer to a target structure's pointer */
|
|
const void *buffer, /* Data to be decoded */
|
|
size_t size /* Size of that buffer */
|
|
);
|
|
|
|
/*
|
|
* Type of generic function which decodes the byte stream into the structure.
|
|
*/
|
|
typedef asn_dec_rval_t (ber_type_decoder_f)(
|
|
struct asn_codec_ctx_s *opt_codec_ctx,
|
|
struct asn_TYPE_descriptor_s *type_descriptor,
|
|
void **struct_ptr, const void *buf_ptr, size_t size,
|
|
int tag_mode);
|
|
|
|
/*******************************
|
|
* INTERNALLY USEFUL FUNCTIONS *
|
|
*******************************/
|
|
|
|
/*
|
|
* Check that all tags correspond to the type definition (as given in head).
|
|
* On return, last_length would contain either a non-negative length of the
|
|
* value part of the last TLV, or the negative number of expected
|
|
* "end of content" sequences. The number may only be negative if the
|
|
* head->last_tag_form is non-zero.
|
|
*/
|
|
asn_dec_rval_t ber_check_tags(
|
|
struct asn_codec_ctx_s *opt_codec_ctx, /* codec options */
|
|
struct asn_TYPE_descriptor_s *type_descriptor,
|
|
asn_struct_ctx_t *opt_ctx, /* saved decoding context */
|
|
const void *ptr, size_t size,
|
|
int tag_mode, /* {-1,0,1}: IMPLICIT, no, EXPLICIT */
|
|
int last_tag_form, /* {-1,0:1}: any, primitive, constr */
|
|
ber_tlv_len_t *last_length,
|
|
int *opt_tlv_form /* optional tag form */
|
|
);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _BER_DECODER_H_ */
|