The class of a dns-rr object. When dns-query is called with the
decode argument nil, the
response from the nameserver is returned in its raw form. The response
is represented by a dns-response object. The answer,
authority and additional fields of a dns-response object contain
dns-rr objects.
dns-rr objects have the following slots and
accessors:
name, accessor is dns-rr-name. A string in fully qualified
domain name format (e.g. "foo.bar.com"). This is the name that the
rest of the dns-rr is describing.
type, accessor is dns-rr-type. This is a number or keyword
symbol describing the type of object this is.
The type :a means that this dns-rr contains the
host address of the name in the answer slot.
The type :ns means that this dns-rr is describing
the authoritative namserver for this name in the answer slot. The
answer slot is a string naming the nameserver's host name. Generally
the additional slot of the dns-response will contain an dns-rr of type
:a with the IP address of the nameserver.
The type :mx means that the
answer is a mail exchanger machine name for the name.
The type :soa describe an authority object. When a
query for an unknown host is made, the authority field of the dns-response usually
contains a dns-rr :soa object describing which
domain's authority has specified that that host doesn't exist.
The type :cname describes the machine
for which name is just an alias.
The type :ptr describes the name of a machine as
well and is used in determining a machine name given its IP address.
class, accessor is dns-rr-class. This value is always 1,
meaning "the Internet".
answer, accessor is dns-rr-answer. For a :type
:a response this contains the IP address of the name in
integer format. For type :mx,
:ns, :cname and
:ptr the answer is a string naming a machine.
time-to-live, accessor is dns-rr-time-to-live. An integer number
of seconds for which the answer given is valid and can be cached.
See dns.htm.
The documentation is described in introduction.htm and the index is in index.htm.
Copyright (c) 1998-2000, Franz Inc. Berkeley, CA., USA. All rights reserved.
Created 2000.10.5.