---
name: "ldns_rdf_type"
section: "3"
platform: "linux"
package: "ldns"
version: "1.9.2-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/ldns_rdf_type"
---

# ldns\_rdf\_type(3)

rdata field type

## NAME

ldns\_rdf, ldns\_rdf\_type - rdata field type

## SYNOPSIS

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

\#include \<ldns/ldns.h\>

## DESCRIPTION

*ldns\_rdf*\
 Resource record data field.\

The data is a network ordered array of bytes, which size is specified by\
 the (16-bit) size field. To correctly parse it, use the type\
 specified in the (16-bit) type field with a value from \\ref ldns\_rdf\_type.\
 struct ldns\_struct\_rdf\
 {\
\
 	**The size of the data (in octets):**\
\
 	size\_t \_size;\
\
 	**The type of the data:**\
\
 	ldns\_rdf\_type \_type;\
\
 	**Pointer to the data (raw octets):**\
\
 	void  \*\_data;\
 };\
 typedef struct ldns\_struct\_rdf ldns\_rdf;

*ldns\_rdf\_type*\
 The different types of RDATA fields.\
 enum ldns\_enum\_rdf\_type\
 {\
\
 	**none:**\
\
 	LDNS\_RDF\_TYPE\_NONE,\
\
 	**domain name:**\
\
 	LDNS\_RDF\_TYPE\_DNAME,\
\
 	**8 bits:**\
\
 	LDNS\_RDF\_TYPE\_INT8,\
\
 	**16 bits:**\
\
 	LDNS\_RDF\_TYPE\_INT16,\
\
 	**32 bits:**\
\
 	LDNS\_RDF\_TYPE\_INT32,\
\
 	**64 bits:**\
\
 	LDNS\_RDF\_TYPE\_INT64,\
\
 	**A record:**\
\
 	LDNS\_RDF\_TYPE\_A,\
\
 	**AAAA record:**\
\
 	LDNS\_RDF\_TYPE\_AAAA,\
\
 	**txt string:**\
\
 	LDNS\_RDF\_TYPE\_STR,\
\
 	**apl data:**\
\
 	LDNS\_RDF\_TYPE\_APL,\
\
 	**b32 string:**\
\
 	LDNS\_RDF\_TYPE\_B32\_EXT,\
\
 	**b64 string:**\
\
 	LDNS\_RDF\_TYPE\_B64,\
\
 	**hex string:**\
\
 	LDNS\_RDF\_TYPE\_HEX,\
\
 	**nsec type codes:**\
\
 	LDNS\_RDF\_TYPE\_NSEC,\
\
 	LDNS\_RDF\_TYPE\_BITMAP = LDNS\_RDF\_TYPE\_NSEC,\
\
 	**a RR type:**\
\
 	LDNS\_RDF\_TYPE\_TYPE,\
\
 	**a class:**\
\
 	LDNS\_RDF\_TYPE\_CLASS,\
\
 	**certificate algorithm:**\
\
 	LDNS\_RDF\_TYPE\_CERT\_ALG,\
\
 	**a key algorithm:**\
\
 	LDNS\_RDF\_TYPE\_ALG,\
\
 	**unknown types:**\
\
 	LDNS\_RDF\_TYPE\_UNKNOWN,\
\
 	**time (32 bits):**\
\
 	LDNS\_RDF\_TYPE\_TIME,\
\
 	**period:**\
\
 	LDNS\_RDF\_TYPE\_PERIOD,\
\
 	**tsig time 48 bits:**\
\
 	LDNS\_RDF\_TYPE\_TSIGTIME,\
\
 	/\*\* Represents the Public Key Algorithm, HIT and Public Key fields\
\
 	    for the HIP RR types.  A HIP specific rdf type is used because of\
\
 	    the unusual layout in wireformat (see RFC 5205 Section 5) \*/\
\
 	LDNS\_RDF\_TYPE\_HIP,\
\
 	/\*\* variable length any type rdata where the length\
\
 	    is specified by the first 2 bytes \*/\
\
 	LDNS\_RDF\_TYPE\_INT16\_DATA,\
\
 	**protocol and port bitmaps:**\
\
 	LDNS\_RDF\_TYPE\_SERVICE,\
\
 	**location data:**\
\
 	LDNS\_RDF\_TYPE\_LOC,\
\
 	**well known services:**\
\
 	LDNS\_RDF\_TYPE\_WKS,\
\
 	**NSAP:**\
\
 	LDNS\_RDF\_TYPE\_NSAP,\
\
 	**ATMA:**\
\
 	LDNS\_RDF\_TYPE\_ATMA,\
\
 	**IPSECKEY:**\
\
 	LDNS\_RDF\_TYPE\_IPSECKEY,\
\
 	**nsec3 hash salt:**\
\
 	LDNS\_RDF\_TYPE\_NSEC3\_SALT,\
\
 	**nsec3 base32 string (with length byte on wire:**\
\
 	LDNS\_RDF\_TYPE\_NSEC3\_NEXT\_OWNER,\

	/\*\* 4 shorts represented as 4 \* 16 bit hex numbers\
\
 	 \*  separated by colons. For NID and L64.\
\
 	 \*/\
\
 	LDNS\_RDF\_TYPE\_ILNP64,\

	**6 \* 8 bit hex numbers separated by dashes. For EUI48.:**\
\
 	LDNS\_RDF\_TYPE\_EUI48,\
\
 	**8 \* 8 bit hex numbers separated by dashes. For EUI64.:**\
\
 	LDNS\_RDF\_TYPE\_EUI64,\

	**Character string without quotes.:**\
\
 	LDNS\_RDF\_TYPE\_UNQUOTED,\

	/\*\* A non-zero sequence of US-ASCII letters and numbers in lower case.\
\
 	 \*  For CAA.\
\
 	 \*/\
\
 	LDNS\_RDF\_TYPE\_TAG,\

	/\*\* A \<character-string\> encoding of the value field as specified \
\
 	 \* \[RFC1035\], Section 5.1., encoded as remaining rdata.\
\
 	 \* For CAA.\
\
 	 \*/\
\
 	LDNS\_RDF\_TYPE\_LONG\_STR,\

	/\*\* Since RFC7218 TLSA records can be given with mnemonics,\
\
 	 \* hence these rdata field types.  But as with DNSKEYs, the output\
\
 	 \* is always numeric.\
\
 	 \*/\
\
 	LDNS\_RDF\_TYPE\_CERTIFICATE\_USAGE,\
\
 	LDNS\_RDF\_TYPE\_SELECTOR,\
\
 	LDNS\_RDF\_TYPE\_MATCHING\_TYPE,\

	**draft-ietf-mboned-driad-amt-discovery \*:**\
\
 	LDNS\_RDF\_TYPE\_AMTRELAY,\

	**draft-ietf-dnsop-svcb-https \*:**\
\
 	LDNS\_RDF\_TYPE\_SVCPARAMS,\

	**draft-johnson-dns-ipn-cla-07 \*:**\
\
 	LDNS\_RDF\_TYPE\_IPN\
 };\
 typedef enum ldns\_enum\_rdf\_type ldns\_rdf\_type;

## AUTHOR

The ldns team at NLnet Labs.

## REPORTING BUGS

Please report bugs to dns-team@nlnetlabs.nl or on GitHub at https://github.com/NLnetLabs/ldns/issues

## COPYRIGHT

Copyright (c) 2004 - 2006 NLnet Labs.

Licensed under the BSD License. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

## SEE ALSO

*ldns\_rdf\_set\_size*, *ldns\_rdf\_set\_type*, *ldns\_rdf\_set\_data*, *ldns\_rdf\_size*, *ldns\_rdf\_get\_type*, *ldns\_rdf\_data*, *ldns\_rdf\_compare*, *ldns\_rdf\_new*, *ldns\_rdf\_clone*, *ldns\_rdf\_new\_frm\_data*, *ldns\_rdf\_new\_frm\_str*, *ldns\_rdf\_new\_frm\_fp*, *ldns\_rdf\_free*, *ldns\_rdf\_deep\_free*, *ldns\_rdf\_print*, *ldns\_native2rdf\_int8*, *ldns\_native2rdf\_int16*, *ldns\_native2rdf\_int32*, *ldns\_native2rdf\_int16\_data*, *ldns\_rdf2native\_int8*, *ldns\_rdf2native\_int16*, *ldns\_rdf2native\_int32*, *ldns\_rdf2native\_sockaddr\_storage*, *ldns\_rdf2native\_time\_t*, *ldns\_native2rdf\_int8*, *ldns\_native2rdf\_int16*, *ldns\_native2rdf\_int32*, *ldns\_native2rdf\_int16\_data*, *ldns\_rdf2native\_int8*, *ldns\_rdf2native\_int16*, *ldns\_rdf2native\_int32*, *ldns\_rdf2native\_sockaddr\_storage*, *ldns\_rdf2native\_time\_t*, *ldns\_native2rdf\_int8*, *ldns\_native2rdf\_int16*, *ldns\_native2rdf\_int32*, *ldns\_native2rdf\_int16\_data*, *ldns\_rdf2native\_int8*, *ldns\_rdf2native\_int16*, *ldns\_rdf2native\_int32*, *ldns\_rdf2native\_sockaddr\_storage*, *ldns\_rdf2native\_time\_t*. And **perldoc Net::DNS**, **RFC1034**, **RFC1035**, **RFC4033**, **RFC4034**  and **RFC4035**.

## REMARKS

This manpage was automatically generated from the ldns source code.