module Net
module DNS
class RR
class MX < RR
attr_reader :preference, :exchange
private
def check_mx(str)
if str.strip =~ /^(\d+)\s+(\S+)$/
return $1.to_i,$2
else
raise RRArgumentError, "MX section not valid"
end
end
def build_pack
@mx_pack = [@preference].pack("n") + pack_name(@exchange)
@rdlength = @mx_pack.size
end
def set_type
@type = Net::DNS::RR::Types.new("MX")
end
def get_data
@mx_pack
end
def get_inspect
"#@preference #@exchange"
end
def subclass_new_from_hash(args)
if args.has_key? :preference and args.has_key? :exchange
@preference = args[0][:preference].to_i
@exchange = args[0][:exchange]
else
raise RRArgumentError, ":preference and :exchange fields are mandatory but missing"
end
end
def subclass_new_from_string(str)
@preference,@exchange = check_mx(str)
end
def subclass_new_from_binary(data,offset)
@preference = data.unpack("@#{offset} n")[0]
offset += 2
@exchange,offset = dn_expand(data,offset)
return offset
end
end
end
end
end