diff options
Diffstat (limited to 'lib/ipaddress/ipv6.rb')
| -rw-r--r-- | lib/ipaddress/ipv6.rb | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/lib/ipaddress/ipv6.rb b/lib/ipaddress/ipv6.rb index 2dda4d2..1601a01 100644 --- a/lib/ipaddress/ipv6.rb +++ b/lib/ipaddress/ipv6.rb @@ -87,6 +87,7 @@ module IPAddress; # ip6 = IPAddress "2001:db8::8:800:200c:417a/64" # def initialize(str) + raise ArgumentError, "Nil IP" unless str ip, netmask = str.split("/") if str =~ /:.+\./ @@ -102,6 +103,7 @@ module IPAddress; end @prefix = Prefix128.new(netmask ? netmask : 128) + @allocator = 0 end # def initialize @@ -397,6 +399,13 @@ module IPAddress; @compressed end + # + # Returns true if the address is a link local address + # + def link_local? + @groups[0] == 0xfe80 + end + # # Returns true if the address is an unspecified address # @@ -415,6 +424,34 @@ module IPAddress; @prefix == 128 and @compressed == "::1" end + # + # Checks if an IPv6 address objects belongs + # to a link-local network RFC4291 + # + # Example: + # + # ip = IPAddress "fe80::1" + # ip.link_local? + # #=> true + # + def link_local? + [self.class.new("fe80::/64")].any? {|i| i.include? self} + end + + # + # Checks if an IPv6 address objects belongs + # to a unique-local network RFC4193 + # + # Example: + # + # ip = IPAddress "fc00::1" + # ip.unique_local? + # #=> true + # + def unique_local? + [self.class.new("fc00::/7")].any? {|i| i.include? self} + end + # # Returns true if the address is a mapped address # @@ -487,6 +524,7 @@ module IPAddress; # #=> ["2001:db8:1::1/64","2001:db8:1::1/65","2001:db8:2::1/64"] # def <=>(oth) + return nil unless oth.is_a?(self.class) return prefix <=> oth.prefix if to_u128 == oth.to_u128 to_u128 <=> oth.to_u128 end @@ -628,6 +666,36 @@ module IPAddress; def self.parse_hex(hex, prefix=128) self.parse_u128(hex.hex, prefix) end + + # + # Allocates a new ip from the current subnet. Optional skip parameter + # can be used to skip addresses. + # + # Will raise StopIteration exception when all addresses have been allocated + # + # Example: + # + # ip = IPAddress("10.0.0.0/24") + # ip.allocate + # #=> "10.0.0.1/24" + # ip.allocate + # #=> "10.0.0.2/24" + # ip.allocate(2) + # #=> "10.0.0.5/24" + # + # + # Uses an internal @allocator which tracks the state of allocated + # addresses. + # + def allocate(skip=0) + @allocator += 1 + skip + + next_ip = network_u128+@allocator + if next_ip > broadcast_u128 + raise StopIteration + end + self.class.parse_u128(next_ip, @prefix) + end private |