2004-06-03 03:38:44 +00:00
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/*-
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* Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
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* Redistribution and modifications are permitted subject to BSD license.
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*/
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#ifndef _CONSTR_TYPE_H_
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#define _CONSTR_TYPE_H_
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#include <asn_types.h> /* System-dependent types */
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#include <ber_tlv_length.h>
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#include <ber_tlv_tag.h>
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#include <ber_decoder.h>
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#include <der_encoder.h>
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#include <constraints.h>
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struct asn1_TYPE_descriptor_s; /* Forward declaration */
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/*
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* Free the structure according to its specification.
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* If (free_contents_only) is set, the wrapper structure itself (struct_ptr)
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* will not be freed. (It may be useful in case the structure is allocated
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* statically or arranged on the stack, yet its elements are allocated
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* dynamically.)
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*/
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typedef void (asn_struct_free_f)(
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struct asn1_TYPE_descriptor_s *type_descriptor,
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void *struct_ptr, int free_contents_only);
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/*
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* Print the structure according to its specification.
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*/
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typedef int (asn_struct_print_f)(
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struct asn1_TYPE_descriptor_s *type_descriptor,
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const void *struct_ptr,
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int level, /* Indentation level */
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asn_app_consume_bytes_f *callback, void *app_key);
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/*
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* Return the outmost tag of the type.
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* If the type is untagged CHOICE, the dynamic operation is performed.
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* NOTE: This function pointer type is only useful internally.
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* Do not use it in your application.
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*/
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typedef ber_tlv_tag_t (asn_outmost_tag_f)(
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struct asn1_TYPE_descriptor_s *type_descriptor,
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const void *struct_ptr, int tag_mode, ber_tlv_tag_t tag);
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/* The instance of the above function type */
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asn_outmost_tag_f asn1_TYPE_outmost_tag;
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/*
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* The definitive description of the destination language's structure.
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*/
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typedef struct asn1_TYPE_descriptor_s {
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char *name; /* A name of the ASN.1 type */
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/*
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* Generalized functions for dealing with the specific type.
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* May be directly invoked by applications.
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*/
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asn_constr_check_f *check_constraints; /* Constraints validator */
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ber_type_decoder_f *ber_decoder; /* Free-form BER decoder */
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der_type_encoder_f *der_encoder; /* Canonical DER encoder */
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asn_struct_print_f *print_struct; /* Human readable output */
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asn_struct_free_f *free_struct; /* Free the structure */
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/*
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* Functions used internally. Should not be used by applications.
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*/
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asn_outmost_tag_f *outmost_tag; /* <optional, internal> */
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/*
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* Tags that are expected, with some of their vital properties.
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*/
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ber_tlv_tag_t *tags; /* At least one tag must be specified */
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int tags_count; /* Number of tags which are expected */
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int tags_impl_skip; /* Tags to skip in implicit mode */
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int last_tag_form; /* Acceptable form of the tag (prim, constr) */
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/*
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* Additional information describing the type, used by appropriate
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* functions above.
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*/
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void *specifics;
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} asn1_TYPE_descriptor_t;
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2004-06-06 07:20:02 +00:00
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/*
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* BER tag to element number mapping.
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*/
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typedef struct asn1_TYPE_tag2member_s {
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ber_tlv_tag_t el_tag; /* Outmost tag of the member */
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int el_no; /* Index of the associated member, base 0 */
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} asn1_TYPE_tag2member_t;
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2004-06-03 03:38:44 +00:00
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/*
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* This function is a wrapper around (td)->print_struct, which prints out
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* the contents of the target language's structure (struct_ptr) into the
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* file pointer (stream) in human readable form.
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* RETURN VALUES:
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* 0: The structure is printed.
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* -1: Problem dumping the structure.
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*/
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int asn_fprint(FILE *stream, /* Destination stream descriptor */
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asn1_TYPE_descriptor_t *td, /* ASN.1 type descriptor */
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const void *struct_ptr); /* Structure to be printed */
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#endif /* _CONSTR_TYPE_H_ */
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