Module: RubySL::Socket::IPv6

Defined in:
lib/rubysl/socket/ipv6.rb

Constant Summary collapse

LOOPBACK =

The IPv6 loopback address as produced by inet_pton(INET6, “::1”)

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1]
UNSPECIFIED =

The bytes used for an unspecified IPv6 address.

[0] * 16
COMPAT_PREFIX =

The first 10 bytes of an IPv4 compatible IPv6 address.

[0] * 10

Class Method Summary collapse

Class Method Details

.ipv4_compatible?(bytes) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubysl/socket/ipv6.rb', line 27

def self.ipv4_compatible?(bytes)
  prefix = bytes.first(10)
  follow = bytes[10..11]

  prefix == COMPAT_PREFIX &&
    follow[0] == 0 &&
    follow[1] == 0 &&
    (bytes[-4] > 0 || bytes[-3] > 0 || bytes[-2] > 0)
end

.ipv4_embedded?(bytes) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubysl/socket/ipv6.rb', line 13

def self.ipv4_embedded?(bytes)
  ipv4_mapped?(bytes) || ipv4_compatible?(bytes)
end

.ipv4_mapped?(bytes) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubysl/socket/ipv6.rb', line 17

def self.ipv4_mapped?(bytes)
  prefix = bytes.first(10)
  follow = bytes[10..11]

  prefix == COMPAT_PREFIX &&
    follow[0] == 255 &&
    follow[1] == 255 &&
    (bytes[-4] > 0 || bytes[-3] > 0 || bytes[-2] > 0)
end