Class: ZeroConf::Client

Inherits:
Object
  • Object
show all
Includes:
Utils
Defined in:
lib/zeroconf/client.rb

Direct Known Subclasses

Browser, Discoverer, Resolver

Constant Summary

Constants included from Utils

Utils::BROADCAST_V4, Utils::BROADCAST_V6, Utils::DISCOVERY_NAME

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Utils

#broadcast_v4, #broadcast_v6, #multicast_send, #open_ipv4, #open_ipv6, #unicast_send

Constructor Details

#initialize(name, interfaces: ZeroConf.interfaces) ⇒ Client

Returns a new instance of Client.



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# File 'lib/zeroconf/client.rb', line 11

def initialize name, interfaces: ZeroConf.interfaces
  @name = name
  @interfaces = interfaces
end

Instance Attribute Details

#interfaces ⇒ Object (readonly)

Returns the value of attribute interfaces.



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# File 'lib/zeroconf/client.rb', line 9

def interfaces
  @interfaces
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/zeroconf/client.rb', line 9

def name
  @name
end

Instance Method Details

#run(timeout: 3) ⇒ Object 



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# File 'lib/zeroconf/client.rb', line 16

def run timeout: 3
  sockets = open_interfaces interfaces.map(&:addr), 0

  query = get_query
  sockets.each { |socket| multicast_send(socket, query.encode) }

  start = Process.clock_gettime(Process::CLOCK_MONOTONIC)
  now = start
  msgs = block_given? ? nil : []

  loop do
    wait = timeout && timeout - (now - start)
    return if wait && wait < 0

    readers, = IO.select(sockets, [], [], wait)

    return msgs unless readers

    readers.each do |reader|
      buf, _ = reader.recvfrom 2048
      msg = Resolv::DNS::Message.decode(buf)
      # only yield replies to this question
      if interested? msg
        if block_given?
          if :done == yield(msg)
            return msg
          end
        else
          msgs << msg
        end
      end
    end
    now = Process.clock_gettime(Process::CLOCK_MONOTONIC)
  end
ensure
  sockets.each(&:close) if sockets
end