Class: IP

Inherits:
Object
  • Object
show all
Defined in:
lib/ip.rb

Constant Summary collapse

EXPECTED_CIDRS =

www.cloudflare.com/ips-v4

%w(
  103.21.244.0/22  103.22.200.0/22 103.31.4.0/22   131.0.72.0/22    197.234.240.0/22
  173.245.48.0/20  188.114.96.0/20 190.93.240.0/20 108.162.192.0/18 141.101.64.0/18
  198.41.128.0/17  162.158.0.0/15  172.64.0.0/13   104.16.0.0/12
)

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cidr_str) ⇒ IP

accepts plain IP address, or CIDR notation



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# File 'lib/ip.rb', line 13

def initialize(cidr_str)
  @ip, bits = cidr_str.split('/')
  @bits = bits.to_i if bits
end

Instance Attribute Details

#bits ⇒ Object (readonly)

Returns the value of attribute bits.



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# File 'lib/ip.rb', line 10

def bits
  @bits
end

Class Method Details

.expected_cidrs ⇒ Object 



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# File 'lib/ip.rb', line 37

def self.expected_cidrs
  @cf_ips ||= EXPECTED_CIDRS.map { |cidr| IP.new(cidr) }
end

Instance Method Details

#includes?(ip_addr) ⇒ Boolean

IP.new(‘192.168.0.1/24’).includes?(IP.new(‘192.168.0.1’))

Returns:

  • (Boolean) 


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# File 'lib/ip.rb', line 31

def includes?(ip_addr)
  len = self.bits
  ip_slice = ->(ip) { ip.to_binary[0,len] }
  ip_slice.(self) == ip_slice.(ip_addr)
end

#sketch? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ip.rb', line 26

def sketch?
  @sketch ||= IP.expected_cidrs.none? { |cidr| cidr.includes?(self) }
end

#to_binary ⇒ Object

192.168.0.1 -> 11000000101010000000000000000001



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# File 'lib/ip.rb', line 21

def to_binary
  n_to_b = ->(n) { n.to_s(2).rjust(BITS_IN_SEGMENT, '0') }
  @binary_ip ||= @ip.split('.').map { |segment| n_to_b.(segment.to_i) }.join
end

#to_s ⇒ Object 



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# File 'lib/ip.rb', line 18

def to_s; @ip; end