Module: Datadog::Core::Vendor::IPAddr

Defined in:
lib/datadog/core/vendor/ipaddr.rb

Overview

vendor code from github.com/ruby/ipaddr/blob/master/lib/ipaddr.rb Ruby version below 2.5 does not have the IpAddr#private? method We have to vendor the code because ruby versions below 2.5 did not extract ipaddr as a gem So we can not specify a specific version for ipaddr for ruby versions: 2.1, 2.2, 2.3, 2.4

Class Method Summary collapse

Class Method Details

Returns:

  • (Boolean) 


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# File 'lib/datadog/core/vendor/ipaddr.rb', line 49

def link_local?(ip)
  addr = ip.instance_variable_get(:@addr)

  case ip.family
  when Socket::AF_INET
    addr & 0xffff0000 == 0xa9fe0000 # 169.254.0.0/16
  when Socket::AF_INET6
    addr & 0xffc0_0000_0000_0000_0000_0000_0000_0000 == 0xfe80_0000_0000_0000_0000_0000_0000_0000
  else
    raise ::IPAddr::AddressFamilyError, 'unsupported address family'
  end
end

.loopback?(ip) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/datadog/core/vendor/ipaddr.rb', line 62

def loopback?(ip)
  addr = ip.instance_variable_get(:@addr)

  case ip.family
  when Socket::AF_INET
    addr & 0xff000000 == 0x7f000000
  when Socket::AF_INET6
    addr == 1
  else
    raise ::IPAddr::AddressFamilyError, 'unsupported address family'
  end
end

.private?(ip) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/datadog/core/vendor/ipaddr.rb', line 34

def private?(ip)
  addr = ip.instance_variable_get(:@addr)

  case ip.family
  when Socket::AF_INET
    addr & 0xff000000 == 0x0a000000 ||    # 10.0.0.0/8
      addr & 0xfff00000 == 0xac100000 ||  # 172.16.0.0/12
      addr & 0xffff0000 == 0xc0a80000     # 192.168.0.0/16
  when Socket::AF_INET6
    addr & 0xfe00_0000_0000_0000_0000_0000_0000_0000 == 0xfc00_0000_0000_0000_0000_0000_0000_0000
  else
    raise ::IPAddr::AddressFamilyError, 'unsupported address family'
  end
end