Defines | Functions
dnssec.h File Reference

This module contains base functions for DNSSEC operations (RFC4033 t/m RFC4035). More...

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Defines

#define LDNS_MAX_KEYLEN   2048
#define LDNS_DNSSEC_KEYPROTO   3
#define LDNS_DEFAULT_EXP_TIME   2419200 /* 4 weeks */
#define LDNS_SIGNATURE_LEAVE_ADD_NEW   0
 return values for the old-signature callback
#define LDNS_SIGNATURE_LEAVE_NO_ADD   1
#define LDNS_SIGNATURE_REMOVE_ADD_NEW   2
#define LDNS_SIGNATURE_REMOVE_NO_ADD   3
#define LDNS_NSEC3_MAX_ITERATIONS   65535

Functions

ldns_rrldns_dnssec_get_rrsig_for_name_and_type (const ldns_rdf *name, const ldns_rr_type type, const ldns_rr_list *rrs)
 Returns the first RRSIG rr that corresponds to the rrset with the given name and type.
ldns_rrldns_dnssec_get_dnskey_for_rrsig (const ldns_rr *rrsig, const ldns_rr_list *rrs)
 Returns the DNSKEY that corresponds to the given RRSIG rr from the list, if any.
ldns_rdfldns_nsec_get_bitmap (ldns_rr *nsec)
 Returns the rdata field that contains the bitmap of the covered types of the given NSEC record.
ldns_rdfldns_dnssec_nsec3_closest_encloser (ldns_rdf *qname, ldns_rr_type qtype, ldns_rr_list *nsec3s)
 Returns the dname of the closest (provable) encloser.
bool ldns_dnssec_pkt_has_rrsigs (const ldns_pkt *pkt)
 Checks whether the packet contains rrsigs.
ldns_rr_listldns_dnssec_pkt_get_rrsigs_for_name_and_type (const ldns_pkt *pkt, ldns_rdf *name, ldns_rr_type type)
 Returns a ldns_rr_list containing the signatures covering the given name and type.
ldns_rr_listldns_dnssec_pkt_get_rrsigs_for_type (const ldns_pkt *pkt, ldns_rr_type type)
 Returns a ldns_rr_list containing the signatures covering the given type.
uint16_t ldns_calc_keytag (const ldns_rr *key)
 calculates a keytag of a key for use in DNSSEC.
uint16_t ldns_calc_keytag_raw (uint8_t *key, size_t keysize)
 Calculates keytag of DNSSEC key, operates on wireformat rdata.
ldns_rrldns_key_rr2ds (const ldns_rr *key, ldns_hash h)
 returns a new DS rr that represents the given key rr.
ldns_rdfldns_dnssec_create_nsec_bitmap (ldns_rr_type rr_type_list[], size_t size, ldns_rr_type nsec_type)
 Create the type bitmap for an NSEC(3) record.
int ldns_dnssec_rrsets_contains_type (ldns_dnssec_rrsets *rrsets, ldns_rr_type type)
 returns whether a rrset of the given type is found in the rrsets.
ldns_rrldns_dnssec_create_nsec (ldns_dnssec_name *from, ldns_dnssec_name *to, ldns_rr_type nsec_type)
 Creates NSEC.
ldns_rrldns_dnssec_create_nsec3 (ldns_dnssec_name *from, ldns_dnssec_name *to, ldns_rdf *zone_name, uint8_t algorithm, uint8_t flags, uint16_t iterations, uint8_t salt_length, uint8_t *salt)
 Creates NSEC3.
ldns_rrldns_create_nsec (ldns_rdf *cur_owner, ldns_rdf *next_owner, ldns_rr_list *rrs)
 Create a NSEC record.
ldns_rdfldns_nsec3_hash_name (ldns_rdf *name, uint8_t algorithm, uint16_t iterations, uint8_t salt_length, uint8_t *salt)
 Calculates the hashed name using the given parameters.
void ldns_nsec3_add_param_rdfs (ldns_rr *rr, uint8_t algorithm, uint8_t flags, uint16_t iterations, uint8_t salt_length, uint8_t *salt)
 Sets all the NSEC3 options.
ldns_rrldns_create_nsec3 (ldns_rdf *cur_owner, ldns_rdf *cur_zone, ldns_rr_list *rrs, uint8_t algorithm, uint8_t flags, uint16_t iterations, uint8_t salt_length, uint8_t *salt, bool emptynonterminal)
uint8_t ldns_nsec3_algorithm (const ldns_rr *nsec3_rr)
 Returns the hash algorithm used in the given NSEC3 RR.
uint8_t ldns_nsec3_flags (const ldns_rr *nsec3_rr)
 Returns flags field.
bool ldns_nsec3_optout (const ldns_rr *nsec3_rr)
 Returns true if the opt-out flag has been set in the given NSEC3 RR.
uint16_t ldns_nsec3_iterations (const ldns_rr *nsec3_rr)
 Returns the number of hash iterations used in the given NSEC3 RR.
ldns_rdfldns_nsec3_salt (const ldns_rr *nsec3_rr)
 Returns the salt used in the given NSEC3 RR.
uint8_t ldns_nsec3_salt_length (const ldns_rr *nsec3_rr)
 Returns the length of the salt used in the given NSEC3 RR.
uint8_t * ldns_nsec3_salt_data (const ldns_rr *nsec3_rr)
 Returns the salt bytes used in the given NSEC3 RR.
ldns_rdfldns_nsec3_next_owner (const ldns_rr *nsec3_rr)
 Returns the first label of the next ownername in the NSEC3 chain (ie.
ldns_rdfldns_nsec3_bitmap (const ldns_rr *nsec3_rr)
 Returns the bitmap specifying the covered types of the given NSEC3 RR.
ldns_rdfldns_nsec3_hash_name_frm_nsec3 (const ldns_rr *nsec, ldns_rdf *name)
 Calculates the hashed name using the parameters of the given NSEC3 RR.
bool ldns_nsec_bitmap_covers_type (const ldns_rdf *nsec_bitmap, ldns_rr_type type)
 Checks coverage of NSEC RR type bitmap.
bool ldns_nsec_covers_name (const ldns_rr *nsec, const ldns_rdf *name)
 Checks coverage of NSEC(3) RR name span Remember that nsec and name must both be in canonical form (ie use ldns_rr2canonical and ldns_dname2canonical prior to calling this function)
ldns_status ldns_dnssec_chain_nsec3_list (ldns_rr_list *nsec3_rrs)
 chains nsec3 list
int qsort_rr_compare_nsec3 (const void *a, const void *b)
 compare for nsec3 sort
void ldns_rr_list_sort_nsec3 (ldns_rr_list *unsorted)
 sort nsec3 list
int ldns_dnssec_default_add_to_signatures (ldns_rr *sig, void *n)
 Default callback function to always leave present signatures, and add new ones.
int ldns_dnssec_default_leave_signatures (ldns_rr *sig, void *n)
 Default callback function to always leave present signatures, and add no new ones for the keys of these signatures.
int ldns_dnssec_default_delete_signatures (ldns_rr *sig, void *n)
 Default callback function to always remove present signatures, but add no new ones.
int ldns_dnssec_default_replace_signatures (ldns_rr *sig, void *n)
 Default callback function to always leave present signatures, and add new ones.

Detailed Description

This module contains base functions for DNSSEC operations (RFC4033 t/m RFC4035).

Since those functions heavily rely op cryptographic operations, this module is dependent on openssl.

Definition in file dnssec.h.


Define Documentation

#define LDNS_MAX_KEYLEN   2048

Definition at line 41 of file dnssec.h.

#define LDNS_DNSSEC_KEYPROTO   3

Definition at line 42 of file dnssec.h.

#define LDNS_DEFAULT_EXP_TIME   2419200 /* 4 weeks */

Definition at line 44 of file dnssec.h.

return values for the old-signature callback

Definition at line 47 of file dnssec.h.

Definition at line 48 of file dnssec.h.

Definition at line 49 of file dnssec.h.

Definition at line 50 of file dnssec.h.

#define LDNS_NSEC3_MAX_ITERATIONS   65535

Definition at line 87 of file dnssec.h.


Function Documentation

ldns_rr* ldns_dnssec_get_rrsig_for_name_and_type ( const ldns_rdf name,
const ldns_rr_type  type,
const ldns_rr_list rrs 
)

Returns the first RRSIG rr that corresponds to the rrset with the given name and type.

Parameters:
[in]nameThe dname of the RRset covered by the RRSIG to find
[in]typeThe type of the RRset covered by the RRSIG to find
[in]rrsList of rrs to search in
Returns:
Pointer to the first RRsig ldns_rr found, or NULL if it is not present

Definition at line 29 of file dnssec.c.

References ldns_dname_compare(), ldns_rdf2rr_type(), ldns_rr_get_type(), ldns_rr_list_rr(), ldns_rr_list_rr_count(), ldns_rr_owner(), ldns_rr_rrsig_typecovered(), and LDNS_RR_TYPE_RRSIG.

ldns_rr* ldns_dnssec_get_dnskey_for_rrsig ( const ldns_rr rrsig,
const ldns_rr_list rrs 
)

Returns the DNSKEY that corresponds to the given RRSIG rr from the list, if any.

Parameters:
[in]rrsigThe rrsig to find the DNSKEY for
[in]rrsThe rr list to find the key in
Returns:
The DNSKEY that corresponds to the given RRSIG, or NULL if it was not found.

Definition at line 57 of file dnssec.c.

References ldns_calc_keytag(), ldns_dname_compare(), ldns_rdf2native_int16(), ldns_rr_get_type(), ldns_rr_list_rr(), ldns_rr_list_rr_count(), ldns_rr_owner(), ldns_rr_rrsig_keytag(), ldns_rr_rrsig_signame(), and LDNS_RR_TYPE_DNSKEY.

Returns the rdata field that contains the bitmap of the covered types of the given NSEC record.

Parameters:
[in]nsecThe nsec to get the covered type bitmap of
Returns:
An ldns_rdf containing the bitmap, or NULL on error

Definition at line 84 of file dnssec.c.

References ldns_rr_get_type(), ldns_rr_rdf(), LDNS_RR_TYPE_NSEC, and LDNS_RR_TYPE_NSEC3.

Returns the dname of the closest (provable) encloser.

Checks whether the packet contains rrsigs.

Definition at line 199 of file dnssec.c.

References ldns_pkt_ancount(), ldns_pkt_answer(), ldns_pkt_authority(), ldns_pkt_nscount(), ldns_rr_get_type(), ldns_rr_list_rr(), and LDNS_RR_TYPE_RRSIG.

Returns a ldns_rr_list containing the signatures covering the given name and type.

Definition at line 218 of file dnssec.c.

References ldns_pkt_rr_list_by_name_and_type(), ldns_rdf_free(), ldns_rdf_new(), LDNS_RDF_SIZE_WORD, LDNS_RDF_TYPE_TYPE, ldns_rr_list_deep_free(), ldns_rr_list_subtype_by_rdf(), LDNS_RR_TYPE_RRSIG, and LDNS_SECTION_ANY_NOQUESTION.

Returns a ldns_rr_list containing the signatures covering the given type.

Definition at line 245 of file dnssec.c.

References ldns_pkt_rr_list_by_type(), ldns_rdf_free(), ldns_rdf_new(), LDNS_RDF_TYPE_TYPE, ldns_rr_list_deep_free(), ldns_rr_list_subtype_by_rdf(), LDNS_RR_TYPE_RRSIG, and LDNS_SECTION_ANY_NOQUESTION.

uint16_t ldns_calc_keytag ( const ldns_rr key)

calculates a keytag of a key for use in DNSSEC.

Parameters:
[in]keythe key as an RR to use for the calc.
Returns:
the keytag

Definition at line 272 of file dnssec.c.

References ldns_buffer_begin(), ldns_buffer_free(), ldns_buffer_new(), ldns_buffer_position(), ldns_calc_keytag_raw(), LDNS_MIN_BUFLEN, ldns_rr_get_type(), ldns_rr_rdata2buffer_wire(), LDNS_RR_TYPE_DNSKEY, and LDNS_RR_TYPE_KEY.

uint16_t ldns_calc_keytag_raw ( uint8_t *  key,
size_t  keysize 
)

Calculates keytag of DNSSEC key, operates on wireformat rdata.

Parameters:
[in]keythe key as uncompressed wireformat rdata.
[in]keysizelength of key data.
Returns:
the keytag

Definition at line 302 of file dnssec.c.

References LDNS_RSAMD5.

ldns_rr* ldns_key_rr2ds ( const ldns_rr key,
ldns_hash  h 
)
ldns_rdf* ldns_dnssec_create_nsec_bitmap ( ldns_rr_type  rr_type_list[],
size_t  size,
ldns_rr_type  nsec_type 
)

Create the type bitmap for an NSEC(3) record.

Definition at line 658 of file dnssec.c.

References LDNS_FREE, ldns_rdf_new_frm_data(), LDNS_RDF_TYPE_NSEC, LDNS_RR_TYPE_NSEC, LDNS_RR_TYPE_NSEC3, ldns_set_bit(), LDNS_XMALLOC, and LDNS_XREALLOC.

returns whether a rrset of the given type is found in the rrsets.

Parameters:
[in]rrsetsthe rrsets to be tested
[in]typethe type to test for
Returns:
int 1 if the type was found, 0 otherwise.

Definition at line 758 of file dnssec.c.

References ldns_struct_dnssec_rrsets::next, and ldns_struct_dnssec_rrsets::type.

ldns_rr* ldns_dnssec_create_nsec3 ( ldns_dnssec_name from,
ldns_dnssec_name to,
ldns_rdf zone_name,
uint8_t  algorithm,
uint8_t  flags,
uint16_t  iterations,
uint8_t  salt_length,
uint8_t *  salt 
)
ldns_rr* ldns_create_nsec ( ldns_rdf cur_owner,
ldns_rdf next_owner,
ldns_rr_list rrs 
)

Create a NSEC record.

Parameters:
[in]cur_ownerthe current owner which should be taken as the starting point
[in]next_ownerthe rrlist which the nsec rr should point to
[in]rrsall rrs from the zone, to find all RR types of cur_owner in
Returns:
a ldns_rr with the nsec record in it

Definition at line 917 of file dnssec.c.

References ldns_dnssec_create_nsec_bitmap(), ldns_rdf_clone(), ldns_rdf_compare(), ldns_rr_get_type(), ldns_rr_list_rr(), ldns_rr_list_rr_count(), ldns_rr_new(), ldns_rr_owner(), ldns_rr_push_rdf(), ldns_rr_set_owner(), ldns_rr_set_type(), LDNS_RR_TYPE_NSEC, and LDNS_RR_TYPE_RRSIG.

ldns_rdf* ldns_nsec3_hash_name ( ldns_rdf name,
uint8_t  algorithm,
uint16_t  iterations,
uint8_t  salt_length,
uint8_t *  salt 
)

Calculates the hashed name using the given parameters.

Parameters:
[in]*nameThe owner name to calculate the hash for
[in]algorithmThe hash algorithm to use
[in]iterationsThe number of hash iterations to use
[in]salt_lengthThe length of the salt in bytes
[in]saltThe salt to use
Returns:
The hashed owner name rdf, without the domain name

Definition at line 967 of file dnssec.c.

References ldns_b32_ntop_extended_hex(), ldns_dname2canonical(), LDNS_FREE, ldns_rdf_clone(), ldns_rdf_data(), ldns_rdf_deep_free(), ldns_rdf_print(), ldns_rdf_size(), LDNS_SHA1, ldns_sha1(), LDNS_SHA1_DIGEST_LENGTH, LDNS_STATUS_OK, ldns_str2rdf_dname(), and LDNS_XMALLOC.

void ldns_nsec3_add_param_rdfs ( ldns_rr rr,
uint8_t  algorithm,
uint8_t  flags,
uint16_t  iterations,
uint8_t  salt_length,
uint8_t *  salt 
)

Sets all the NSEC3 options.

The rr to set them in must be initialized with _new() and type LDNS_RR_TYPE_NSEC3

Parameters:
[in]*rrThe RR to set the values in
[in]algorithmThe NSEC3 hash algorithm
[in]flagsThe flags field
[in]iterationsThe number of hash iterations
[in]salt_lengthThe length of the salt in bytes
[in]saltThe salt bytes

Definition at line 1060 of file dnssec.c.

References LDNS_FREE, ldns_native2rdf_int16(), ldns_rdf_deep_free(), ldns_rdf_new_frm_data(), LDNS_RDF_TYPE_INT16, LDNS_RDF_TYPE_INT8, LDNS_RDF_TYPE_NSEC3_SALT, ldns_rr_set_rdf(), and LDNS_XMALLOC.

ldns_rr* ldns_create_nsec3 ( ldns_rdf cur_owner,
ldns_rdf cur_zone,
ldns_rr_list rrs,
uint8_t  algorithm,
uint8_t  flags,
uint16_t  iterations,
uint8_t  salt_length,
uint8_t *  salt,
bool  emptynonterminal 
)
uint8_t ldns_nsec3_algorithm ( const ldns_rr nsec3_rr)

Returns the hash algorithm used in the given NSEC3 RR.

Parameters:
[in]*nsec3_rrThe RR to read from
Returns:
The algorithm identifier, or 0 on error

Definition at line 1210 of file dnssec.c.

References ldns_rdf2native_int8(), ldns_rdf_size(), ldns_rr_get_type(), ldns_rr_rdf(), LDNS_RR_TYPE_NSEC3, and LDNS_RR_TYPE_NSEC3PARAM.

uint8_t ldns_nsec3_flags ( const ldns_rr nsec3_rr)
bool ldns_nsec3_optout ( const ldns_rr nsec3_rr)

Returns true if the opt-out flag has been set in the given NSEC3 RR.

Parameters:
[in]*nsec3_rrThe RR to read from
Returns:
true if the RR has type NSEC3 and the opt-out bit has been set, false otherwise

Definition at line 1236 of file dnssec.c.

References ldns_nsec3_flags(), and LDNS_NSEC3_VARS_OPTOUT_MASK.

uint16_t ldns_nsec3_iterations ( const ldns_rr nsec3_rr)

Returns the number of hash iterations used in the given NSEC3 RR.

Parameters:
[in]*nsec3_rrThe RR to read from
Returns:
The number of iterations

Definition at line 1242 of file dnssec.c.

References ldns_rdf2native_int16(), ldns_rdf_size(), ldns_rr_get_type(), ldns_rr_rdf(), LDNS_RR_TYPE_NSEC3, and LDNS_RR_TYPE_NSEC3PARAM.

ldns_rdf* ldns_nsec3_salt ( const ldns_rr nsec3_rr)

Returns the salt used in the given NSEC3 RR.

Parameters:
[in]*nsec3_rrThe RR to read from
Returns:
The salt rdf, or NULL on error

Definition at line 1256 of file dnssec.c.

References ldns_rr_get_type(), ldns_rr_rdf(), LDNS_RR_TYPE_NSEC3, and LDNS_RR_TYPE_NSEC3PARAM.

uint8_t ldns_nsec3_salt_length ( const ldns_rr nsec3_rr)

Returns the length of the salt used in the given NSEC3 RR.

Parameters:
[in]*nsec3_rrThe RR to read from
Returns:
The length of the salt in bytes

Definition at line 1268 of file dnssec.c.

References ldns_nsec3_salt(), ldns_rdf_data(), and ldns_rdf_size().

uint8_t* ldns_nsec3_salt_data ( const ldns_rr nsec3_rr)

Returns the salt bytes used in the given NSEC3 RR.

Parameters:
[in]*nsec3_rrThe RR to read from
Returns:
The salt in bytes, this is alloced, so you need to free it

Definition at line 1279 of file dnssec.c.

References ldns_nsec3_salt(), ldns_rdf_data(), ldns_rdf_size(), and LDNS_XMALLOC.

ldns_rdf* ldns_nsec3_next_owner ( const ldns_rr nsec3_rr)

Returns the first label of the next ownername in the NSEC3 chain (ie.

without the domain)

Parameters:
[in]nsec3_rrThe RR to read from
Returns:
The first label of the next owner name in the NSEC3 chain, or NULL on error

Definition at line 1296 of file dnssec.c.

References ldns_rr_get_type(), ldns_rr_rdf(), and LDNS_RR_TYPE_NSEC3.

ldns_rdf* ldns_nsec3_bitmap ( const ldns_rr nsec3_rr)

Returns the bitmap specifying the covered types of the given NSEC3 RR.

Parameters:
[in]*nsec3_rrThe RR to read from
Returns:
The covered type bitmap rdf

Definition at line 1306 of file dnssec.c.

References ldns_rr_get_type(), ldns_rr_rdf(), and LDNS_RR_TYPE_NSEC3.

ldns_rdf* ldns_nsec3_hash_name_frm_nsec3 ( const ldns_rr nsec,
ldns_rdf name 
)

Calculates the hashed name using the parameters of the given NSEC3 RR.

Parameters:
[in]*nsecThe RR to use the parameters from
[in]*nameThe owner name to calculate the hash for
Returns:
The hashed owner name rdf, without the domain name

Definition at line 1316 of file dnssec.c.

References LDNS_FREE, ldns_nsec3_algorithm(), ldns_nsec3_hash_name(), ldns_nsec3_iterations(), ldns_nsec3_salt_data(), and ldns_nsec3_salt_length().

bool ldns_nsec_bitmap_covers_type ( const ldns_rdf nsec_bitmap,
ldns_rr_type  type 
)

Checks coverage of NSEC RR type bitmap.

Parameters:
[in]nsec_bitmapThe NSEC bitmap rdata field to check
[in]typeThe type to check
Returns:
true if the NSEC RR covers the type

Definition at line 1341 of file dnssec.c.

References ldns_get_bit(), ldns_rdf_data(), and ldns_rdf_size().

bool ldns_nsec_covers_name ( const ldns_rr nsec,
const ldns_rdf name 
)

Checks coverage of NSEC(3) RR name span Remember that nsec and name must both be in canonical form (ie use ldns_rr2canonical and ldns_dname2canonical prior to calling this function)

Parameters:
[in]nsecThe NSEC RR to check
[in]nameThe owner dname to check, if the nsec record is a NSEC3 record, this should be the hashed name
Returns:
true if the NSEC RR covers the owner name

Definition at line 1374 of file dnssec.c.

References ldns_dname_cat(), ldns_dname_compare(), ldns_dname_left_chop(), ldns_dname_new_frm_str(), LDNS_FREE, ldns_get_errorstr_by_id(), ldns_nsec3_next_owner(), ldns_rdf2str(), ldns_rdf_clone(), ldns_rdf_deep_free(), ldns_rr_get_type(), ldns_rr_owner(), ldns_rr_rdf(), LDNS_RR_TYPE_NSEC, LDNS_RR_TYPE_NSEC3, and LDNS_STATUS_OK.

int qsort_rr_compare_nsec3 ( const void *  a,
const void *  b 
)

compare for nsec3 sort

Definition at line 1545 of file dnssec.c.

References ldns_rdf_compare(), and ldns_rr_owner().

void ldns_rr_list_sort_nsec3 ( ldns_rr_list unsorted)

sort nsec3 list

Definition at line 1562 of file dnssec.c.

References ldns_struct_rr_list::_rrs, ldns_rr_list_rr_count(), and qsort_rr_compare_nsec3().

int ldns_dnssec_default_add_to_signatures ( ldns_rr sig,
void *  n 
)

Default callback function to always leave present signatures, and add new ones.

Parameters:
[in]sigThe signature to check for removal (unused)
[in]nOptional argument (unused)
Returns:
LDNS_SIGNATURE_LEAVE_ADD_NEW

Definition at line 1571 of file dnssec.c.

References LDNS_SIGNATURE_LEAVE_ADD_NEW.

int ldns_dnssec_default_leave_signatures ( ldns_rr sig,
void *  n 
)

Default callback function to always leave present signatures, and add no new ones for the keys of these signatures.

Parameters:
[in]sigThe signature to check for removal (unused)
[in]nOptional argument (unused)
Returns:
LDNS_SIGNATURE_LEAVE_NO_ADD

Definition at line 1579 of file dnssec.c.

References LDNS_SIGNATURE_LEAVE_NO_ADD.

int ldns_dnssec_default_delete_signatures ( ldns_rr sig,
void *  n 
)

Default callback function to always remove present signatures, but add no new ones.

Parameters:
[in]sigThe signature to check for removal (unused)
[in]nOptional argument (unused)
Returns:
LDNS_SIGNATURE_REMOVE_NO_ADD

Definition at line 1587 of file dnssec.c.

References LDNS_SIGNATURE_REMOVE_NO_ADD.

int ldns_dnssec_default_replace_signatures ( ldns_rr sig,
void *  n 
)

Default callback function to always leave present signatures, and add new ones.

Parameters:
[in]sigThe signature to check for removal (unused)
[in]nOptional argument (unused)
Returns:
LDNS_SIGNATURE_REMOVE_ADD_NEW

Definition at line 1595 of file dnssec.c.

References LDNS_SIGNATURE_REMOVE_ADD_NEW.