2 * Copyright (c) 2004-2017 Lev Walkin <vlm@lionet.info>. All rights reserved.
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3 * Redistribution and modifications are permitted subject to BSD license.
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5 #ifndef ASN1_CONSTRAINTS_VALIDATOR_H
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6 #define ASN1_CONSTRAINTS_VALIDATOR_H
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8 #include <asn_system.h> /* Platform-dependent types */
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14 struct asn_TYPE_descriptor_s; /* Forward declaration */
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17 * Validate the structure according to the ASN.1 constraints.
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18 * If errbuf and errlen are given, they shall be pointing to the appropriate
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19 * buffer space and its length before calling this function. Alternatively,
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20 * they could be passed as NULL's. If constraints validation fails,
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21 * errlen will contain the actual number of bytes taken from the errbuf
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22 * to encode an error message (properly 0-terminated).
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25 * This function returns 0 in case all ASN.1 constraints are met
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26 * and -1 if one or more constraints were failed.
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28 int asn_check_constraints(
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29 const struct asn_TYPE_descriptor_s *type_descriptor,
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30 const void *struct_ptr, /* Target language's structure */
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31 char *errbuf, /* Returned error description */
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32 size_t *errlen /* Length of the error description */
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37 * Generic type for constraint checking callback,
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38 * associated with every type descriptor.
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40 typedef int(asn_constr_check_f)(
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41 const struct asn_TYPE_descriptor_s *type_descriptor, const void *struct_ptr,
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42 asn_app_constraint_failed_f *optional_callback, /* Log the error */
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43 void *optional_app_key /* Opaque key passed to a callback */
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46 /*******************************
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47 * INTERNALLY USEFUL FUNCTIONS *
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48 *******************************/
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50 asn_constr_check_f asn_generic_no_constraint; /* No constraint whatsoever */
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51 asn_constr_check_f asn_generic_unknown_constraint; /* Not fully supported */
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54 * Invoke the callback with a complete error message.
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56 #define ASN__CTFAIL if(ctfailcb) ctfailcb
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62 #endif /* ASN1_CONSTRAINTS_VALIDATOR_H */
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