Function trust_dns_proto::op::update_message::delete_rrset

source · 
pub fn delete_rrset(
    record: Record,
    zone_origin: Name,
    use_edns: bool,
) -> Message
Expand description

Deletes an entire 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).

2.5.2 - Delete An RRset

  One RR is added to the Update Section whose NAME and TYPE are those
  of the RRset to be deleted.  TTL must be specified as zero (0) and is
  otherwise not used by the Primary Zone Server.  CLASS must be specified as
  ANY.  RDLENGTH must be zero (0) and RDATA must therefore be empty.
  If no such RRset exists, then this Update RR will be silently ignored
  by the Primary Zone Server.

§Arguments

  • record - The name, class and record_type will be used to match and delete the RecordSet
  • zone_origin - the zone name to update, i.e. SOA name

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.