Class: ResolvFiber::DNS::Resource::IN::SRV

Inherits:
ResolvFiber::DNS::Resource show all
Defined in:
lib/resolv_fiber.rb

Overview

SRV resource record defined in RFC 2782

These records identify the hostname and port that a service is available at.

Constant Summary collapse

TypeValue = 
33
ClassValue = 
IN::ClassValue

Constants inherited from ResolvFiber::DNS::Resource

ClassHash, ClassInsensitiveTypes

Instance Attribute Summary collapse

Attributes inherited from ResolvFiber::DNS::Resource

#ttl

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from ResolvFiber::DNS::Resource

#==, #eql?, get_class, #hash

Constructor Details

#initialize(priority, weight, port, target) ⇒ SRV

Create a SRV resource record.

See the documentation for #priority, #weight, #port and #target for priority, weight, +port and target respectively.



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# File 'lib/resolv_fiber.rb', line 2306

def initialize(priority, weight, port, target)
  @priority = priority.to_int
  @weight = weight.to_int
  @port = port.to_int
  @target = Name.create(target)
end

Instance Attribute Details

#port ⇒ Object (readonly)

The port on this target host of this service.

The range is 0-65535.



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# File 'lib/resolv_fiber.rb', line 2339

def port
  @port
end

#priority ⇒ Object (readonly)

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.



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# File 'lib/resolv_fiber.rb', line 2321

def priority
  @priority
end

#target ⇒ Object (readonly)

The domain name of the target host.

A target of “.” means that the service is decidedly not available at this domain.



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# File 'lib/resolv_fiber.rb', line 2346

def target
  @target
end

#weight ⇒ Object (readonly)

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.



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# File 'lib/resolv_fiber.rb', line 2333

def weight
  @weight
end

Class Method Details

.decode_rdata(msg) ⇒ Object

:nodoc:



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# File 'lib/resolv_fiber.rb', line 2355

def self.decode_rdata(msg) # :nodoc:
  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

Instance Method Details

#encode_rdata(msg) ⇒ Object

:nodoc:



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# File 'lib/resolv_fiber.rb', line 2348

def encode_rdata(msg) # :nodoc:
  msg.put_pack("n", @priority)
  msg.put_pack("n", @weight)
  msg.put_pack("n", @port)
  msg.put_name(@target, compress: false)
end