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#--
#Copyright 2007 Nominet UK
#
#Licensed under the Apache License, Version 2.0 (the "License");
#you may not use this file except in compliance with the License.
#You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
#Unless required by applicable law or agreed to in writing, software
#distributed under the License is distributed on an "AS IS" BASIS,
#WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#See the License for the specific language governing permissions and
#limitations under the License.
#++
module Dnsruby
class RR
module IN
# SRV resource record defined in RFC 2782
#
# These records identify the hostname and port that a service is
# available at.
#
# The format is:
# _Service._Proto.Name TTL Class SRV Priority Weight Port Target
#
# The fields specific to SRV are defined in RFC 2782
class SRV < RR
ClassHash[[TypeValue = Types::SRV, ClassValue = ClassValue]] = self #:nodoc: all
# The priority of this target host.
# A client MUST attempt
# to contact the target host with the lowest-numbered priority it can
# reach; target hosts with the same priority SHOULD be tried in an
# order defined by the weight field. The range is 0-65535. Note that
# it is not widely implemented and should be set to zero.
attr_accessor :priority
# A server selection mechanism.
# The weight field specifies
# a relative weight for entries with the same priority. Larger weights
# SHOULD be given a proportionately higher probability of being
# selected. The range of this number is 0-65535. Domain administrators
# SHOULD use Weight 0 when there isn't any server selection to do, to
# make the RR easier to read for humans (less noisy). Note that it is
# not widely implemented and should be set to zero.
attr_accessor :weight
# The port on this target host of this service. The range is 0-65535.
attr_accessor :port
# The domain name of the target host. A target of "." means
# that the service is decidedly not available at this domain.
attr_accessor :target
def from_data(data) #:nodoc: all
@priority, @weight, @port, @target = data
end
def from_hash(hash)
if hash[:priority]
@priority = hash[:priority].to_int
end
if hash[:weight]
@weight = hash[:weight].to_int
end
if hash[:port]
@port = hash[:port].to_int
end
if hash[:target]
@target= Name.create(hash[:target])
end
end
def from_string(input)
if (input.length > 0)
names = input.split(" ")
@priority = names[0].to_i
@weight = names[1].to_i
@port = names[2].to_i
if (names[3])
@target = Name.create(names[3])
end
end
end
def rdata_to_string
if (@target!=nil)
return "#{@priority} #{@weight} #{@port} #{@target.to_s(true)}"
else
return ""
end
end
def encode_rdata(msg, canonical=false) #:nodoc: all
msg.put_pack("n", @priority)
msg.put_pack("n", @weight)
msg.put_pack("n", @port)
msg.put_name(@target,canonical)
end
def self.decode_rdata(msg) #:nodoc: all
priority, = msg.get_unpack("n")
weight, = msg.get_unpack("n")
port, = msg.get_unpack("n")
target = msg.get_name
return self.new([priority, weight, port, target])
end
end
end
end
end
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