Module: ReDNS::Support

Extended by:
Support
Included in:
Fragment, Support
Defined in:
lib/redns/support.rb

Instance Method Summary collapse

Instance Method Details

#addr_to_arpa(ip) ⇒ Object 



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# File 'lib/redns/support.rb', line 2

def addr_to_arpa(ip)
	ip and (ip.split(/\./).reverse.join('.') + '.in-addr.arpa.')
end

#bind_all_addr ⇒ Object 



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# File 'lib/redns/support.rb', line 44

def bind_all_addr
  '0.0.0.0'
end

#default_nameservers ⇒ Object 



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# File 'lib/redns/support.rb', line 56

def default_nameservers
  ReDNS::Resolver.servers
end

#default_resolver_address ⇒ Object 



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# File 'lib/redns/support.rb', line 60

def default_resolver_address
  ReDNS::Resolver.servers.first
end

#dns_port ⇒ Object 



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# File 'lib/redns/support.rb', line 52

def dns_port
  53
end

#inet_aton(s) ⇒ Object 



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# File 'lib/redns/support.rb', line 12

def inet_aton(s)
	s.split(/\./).map do |c|
	  c.to_i
	end.pack("C*")
end

#inet_ntoa(addr) ⇒ Object 



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# File 'lib/redns/support.rb', line 6

def inet_ntoa(addr)
	addr.unpack("C4")[0, 4].collect do |v|
	  v or 0
	end.join('.')
end

#io_nonblock(nb = true, &block) ⇒ Object 



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# File 'lib/redns/support.rb', line 34

def io_nonblock(nb = true, &block)
  flag = io_nonblock?(io)
  
	io_set_nonblock(io, nb)
	
	yield(block)
ensure
	io_set_nonblock(io, flag)
end

#io_nonblock?(io) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/redns/support.rb', line 18

def io_nonblock?(io)
	(io.fcntl(Fcntl::F_GETFL) & File::NONBLOCK) != 0
end

#io_set_nonblock(io, nb = true) ⇒ Object 



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# File 'lib/redns/support.rb', line 22

def io_set_nonblock(io, nb = true)
	flags = io.fcntl(Fcntl::F_GETFL)
	
	if (nb)
		flags |= File::NONBLOCK
	else
		flags &= ~File::NONBLOCK
	end
	
	io.fcntl(Fcntl::F_SETFL, flags)
end

#is_ip?(address) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/redns/support.rb', line 48

def is_ip?(address)
  address and address.match(/^\d+(\.\d+)+$/)
end