Module: PrivateAddressCheck

Defined in:
lib/private_address_check.rb,
lib/private_address_check/version.rb,
lib/private_address_check/tcpsocket_ext.rb

Constant Summary collapse

CIDR_LIST =

www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml

[
  IPAddr.new("127.0.0.0/8"),     # Loopback
  IPAddr.new("::1/128"),         # Loopback
  IPAddr.new("0.0.0.0/8"),       # Current network (only valid as source address)
  IPAddr.new("169.254.0.0/16"),  # Link-local
  IPAddr.new("10.0.0.0/8"),      # Private network
  IPAddr.new("100.64.0.0/10"),   # Shared Address Space
  IPAddr.new("172.16.0.0/12"),   # Private network
  IPAddr.new("192.0.0.0/24"),    # IETF Protocol Assignments
  IPAddr.new("192.0.2.0/24"),    # TEST-NET-1, documentation and examples
  IPAddr.new("192.88.99.0/24"),  # IPv6 to IPv4 relay (includes 2002::/16)
  IPAddr.new("192.168.0.0/16"),  # Private network
  IPAddr.new("198.18.0.0/15"),   # Network benchmark tests
  IPAddr.new("198.51.100.0/24"), # TEST-NET-2, documentation and examples
  IPAddr.new("203.0.113.0/24"),  # TEST-NET-3, documentation and examples
  IPAddr.new("224.0.0.0/4"),     # IP multicast (former Class D network)
  IPAddr.new("240.0.0.0/4"),     # Reserved (former Class E network)
  IPAddr.new("255.255.255.255"), # Broadcast
  IPAddr.new("64:ff9b::/96"),    # IPv4/IPv6 translation (RFC 6052)
  IPAddr.new("100::/64"),        # Discard prefix (RFC 6666)
  IPAddr.new("2001::/32"),       # Teredo tunneling
  IPAddr.new("2001:10::/28"),    # Deprecated (previously ORCHID)
  IPAddr.new("2001:20::/28"),    # ORCHIDv2
  IPAddr.new("2001:db8::/32"),   # Addresses used in documentation and example source code
  IPAddr.new("2002::/16"),       # 6to4
  IPAddr.new("fc00::/7"),        # Unique local address
  IPAddr.new("fe80::/10"),       # Link-local address
  IPAddr.new("ff00::/8")         # Multicast
].freeze
VERSION = 
"0.5.0".freeze
PrivateConnectionAttemptedError = 
Class.new(StandardError)

Class Method Summary collapse

Class Method Details

.only_public_connections ⇒ Object 



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# File 'lib/private_address_check/tcpsocket_ext.rb', line 6

def only_public_connections
  Thread.current[:private_address_check] = true
  yield
ensure
  Thread.current[:private_address_check] = false
end

.private_address?(address) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/private_address_check.rb', line 41

def private_address?(address)
  CIDR_LIST.any? do |cidr|
    cidr.include?(address)
  end
end

.resolves_to_private_address?(hostname) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/private_address_check.rb', line 47

def resolves_to_private_address?(hostname)
  ips = Socket.getaddrinfo(hostname, nil).map { |info| IPAddr.new(info[3]) }
  return true if ips.empty?

  ips.any? do |ip|
    private_address?(ip)
  end
end