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Contents
module Net
module DNS
class RR
#
# = Pointer Record (PTR)
#
# Class for DNS Pointer (PTR) resource records.
#
# Pointer records are the opposite of A and AAAA RRs
# and are used in Reverse Map zone files to map
# an IP address (IPv4 or IPv6) to a host name.
#
class PTR < RR
# Gets the PTR value.
#
# Returns a String.
def ptrdname
@ptrdname.to_s
end
alias_method :ptr, :ptrdname
# Gets the standardized value for this record,
# represented by the value of <tt>ptrdname</tt>.
#
# Returns a String.
def value
ptrdname.to_s
end
private
def build_pack
@ptrdname_pack = pack_name(@ptrdname)
@rdlength = @ptrdname_pack.size
end
def get_data
@ptrdname_pack
end
def subclass_new_from_hash(args)
if args.has_key?(:ptrdname) or args.has_key?(:ptr)
@ptrdname = args[:ptrdname]
else
raise ArgumentError, ":ptrdname or :ptr field is mandatory"
end
end
def subclass_new_from_string(str)
@ptrdname = check_name(str)
end
def subclass_new_from_binary(data, offset)
@ptrdname, offset = dn_expand(data, offset)
offset
end
private
def set_type
@type = Net::DNS::RR::Types.new("PTR")
end
def get_inspect
value
end
def check_name(input)
IPAddr.new(str)
rescue
raise ArgumentError, "Invalid PTR Section `#{input}'"
end
end
end
end
end
Version data entries
10 entries across 10 versions & 2 rubygems