Function trust_dns_proto::op::update_message::delete_by_rdata

source · 
pub fn delete_by_rdata(
    rrset: RecordSet,
    zone_origin: Name,
    use_edns: bool,
) -> Message
Expand description

Deletes a record (by rdata) from an rrset, optionally require the rrset to exist.

RFC 2136, DNS Update, April 1997

2.4.1 - RRset Exists (Value Independent)

  At least one RR with a specified NAME and TYPE (in the zone and class
  specified in the Zone Section) must exist.

  For this prerequisite, a requestor adds to the section a single RR
  whose NAME and TYPE are equal to that of the zone RRset whose
  existence is required.  RDLENGTH is zero and RDATA is therefore
  empty.  CLASS must be specified as ANY to differentiate this
  condition from that of an actual RR whose RDLENGTH is naturally zero
  (0) (e.g., NULL).  TTL is specified as zero (0).

2.5.4 - Delete An RR From An RRset

  RRs to be deleted are added to the Update Section.  The NAME, TYPE,
  RDLENGTH and RDATA must match the RR being deleted.  TTL must be
  specified as zero (0) and will otherwise be ignored by the Primary
  Zone Server.  CLASS must be specified as NONE to distinguish this from an
  RR addition.  If no such RRs exist, then this Update RR will be
  silently ignored by the Primary Zone Server.

§Arguments

  • rrset - the record(s) to delete from a RRSet, the name, type and rdata must match the record to delete
  • zone_origin - the zone name to update, i.e. SOA name
  • signer - the signer, with private key, to use to sign the request

The update must go to a zone authority (i.e. the server used in the ClientConnection). If the rrset does not exist and must_exist is false, then the RRSet will be deleted.