Selective Acknowledgement option.

www.networksorcery.com/enp/protocol/tcp/option004.htm

Note that SACK always takes its optlen from the size of the string.

Methods
D
E
N
O
V
Class Public methods
new(args={})

Source: show 

# File lib/packetfu/protos/tcp.rb, line 417
                        def initialize(args={})
                                super(
                                        args.merge(:kind => 5,
                                                                                 :optlen => ((args[:value] || "").size + 2)
                                                                                )
                                )
                        end
Instance Public methods
decode()

Source: show 

# File lib/packetfu/protos/tcp.rb, line 432
                        def decode
                                        "SACK:#{self[:value]}"
                        end
encode(str)

Source: show 

# File lib/packetfu/protos/tcp.rb, line 436
                        def encode(str)
                                temp_obj = self.class.new(:value => str)
                                self[:value] = temp_obj.value
                                self[:optlen] = temp_obj.optlen.value
                                self
                        end
optlen=(i)

Source: show 

# File lib/packetfu/protos/tcp.rb, line 425
                        def optlen=(i); typecast i; end
value=(i)

Source: show 

# File lib/packetfu/protos/tcp.rb, line 427
                        def value=(i)
                                self[:optlen] = Int8.new(i.to_s.size + 2)
                                self[:value] = StructFu::String.new(i)
                        end