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You are here: manpages

ldns

Section: C Library Functions (3)
Updated: 30 May 2006
Index Return to Main Contents

NAME

ldns_rr_descriptor, ldns_rr_descript, ldns_rr_descriptor_minimum, ldns_rr_descriptor_maximum, ldns_rr_descriptor_field_type - rdata field descriptors

#include <stdint.h>
#include <stdbool.h>

const ldns_rr_descriptor* ldns_rr_descript(uint16_t type);

size_t ldns_rr_descriptor_minimum(const ldns_rr_descriptor *descriptor);

size_t ldns_rr_descriptor_maximum(const ldns_rr_descriptor *descriptor);

ldns_rdf_type ldns_rr_descriptor_field_type(const ldns_rr_descriptor *descriptor, size_t field);

ldns_rr_descriptor: Contains all information about resource record types.

This structure contains, for all rr types, the rdata fields that are defined.
struct ldns_struct_rr_descriptor
{
       Type of the RR that is described here:

       ldns_rr_type _type;

       Textual name of the RR type.:

       const char *_name;

       Minimum number of rdata fields in the RRs of this type.:

       uint8_t _minimum;

       Maximum number of rdata fields in the RRs of this type.:

       uint8_t _maximum;

       Wireformat specification for the rr, i.e. the types of rdata fields in their respective order.:

       const ldns_rdf_type *_wireformat;

       Special rdf types:

       ldns_rdf_type _variable;

       Specifies whether compression can be used for dnames in this RR type.:

       ldns_rr_compress _compress;

       The number of DNAMEs in the _wireformat string, for parsing.:

       uint8_t _dname_count;

};
typedef struct ldns_struct_rr_descriptor ldns_rr_descriptor;

ldns_rr_descript(): returns the resource record descriptor for the given rr type.
.br type: the type value of the rr type .br Returns the ldns_rr_descriptor for this type

ldns_rr_descriptor_minimum(): returns the minimum number of rdata fields of the rr type this descriptor describes.
.br descriptor: for an rr type .br Returns the minimum number of rdata fields

ldns_rr_descriptor_maximum(): returns the maximum number of rdata fields of the rr type this descriptor describes.
.br descriptor: for an rr type .br Returns the maximum number of rdata fields

ldns_rr_descriptor_field_type(): returns the rdf type for the given rdata field number of the rr type for the given descriptor.
.br descriptor: for an rr type .br field: the field number .br Returns the rdf type for the field