Class: PacketFu::NDPHeader

Inherits:
Struct
  • Object
show all
Includes:
StructFu
Defined in:
lib/bettercap/monkey/packetfu/utils.rb

Constant Summary collapse

PROTOCOL_NUMBER = 
58

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args = {}) ⇒ NDPHeader

Returns a new instance of NDPHeader.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 218

def initialize(args={})
  super(
    Int8.new(args[:ndp_type]),
    Int8.new(args[:ndp_code]),
    Int16.new(args[:ndp_sum]),
    Int32.new(args[:ndp_reserved]),
    AddrIpv6.new.read(args[:ndp_tgt] || ("\x00" * 16)),
    Int8.new(args[:ndp_opt_type]),
    Int8.new(args[:ndp_opt_len]),
    EthMac.new.read(args[:ndp_lla])
  )
end

Instance Attribute Details

#body ⇒ Object

Returns the value of attribute body

Returns:

  • (Object) —

    the current value of body



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 211

def body
  @body
end

#ndp_code ⇒ Object

Getter for the code.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 258

def ndp_code
  @ndp_code
end

#ndp_lla ⇒ Object

Getter for the link local address.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 283

def ndp_lla
  @ndp_lla
end

#ndp_opt_len ⇒ Object

Getter for the options length.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 279

def ndp_opt_len
  @ndp_opt_len
end

#ndp_opt_type ⇒ Object

Getter for the options type field.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 275

def ndp_opt_type
  @ndp_opt_type
end

#ndp_reserved ⇒ Object

Getter for the reserved.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 267

def ndp_reserved
  @ndp_reserved
end

#ndp_sum ⇒ Object

Getter for the checksum.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 263

def ndp_sum
  @ndp_sum
end

#ndp_tgt ⇒ Object

Getter for the target address.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 271

def ndp_tgt
  @ndp_tgt
end

#ndp_type ⇒ Object

Getter for the type.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 254

def ndp_type
  @ndp_type
end

Instance Method Details

#ndp_lladdr ⇒ Object Also known as: ndp_lla_readable

Gets the link local address in a more readable way.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 303

def ndp_lladdr
    EthHeader.str2mac(self[:ndp_lla].to_s)
end

#ndp_lladdr=(mac) ⇒ Object

Sets the link local address in a more readable way.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 296

def ndp_lladdr=(mac)
    mac = EthHeader.mac2str(mac)
    self[:ndp_lla].read mac
    self[:ndp_lla]
end

#ndp_set_flags=(bits) ⇒ Object

Set flag bits (First three are flag bits, the rest are reserved).



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 312

def ndp_set_flags=(bits)
    case bits
    when "000"
        self.ndp_reserved = 0x00000000
    when "001"
        self.ndp_reserved = 0x20000000
    when "010"
        self.ndp_reserved = 0x40000000
    when "011"
        self.ndp_reserved = 0x60000000
    when "100"
        self.ndp_reserved = 0x80000000
    when "101"
        self.ndp_reserved = 0xa0000000
    when "110"
        self.ndp_reserved = 0xc0000000
    when "111"
        self.ndp_reserved = 0xe0000000
    end
end

#ndp_sum_readable ⇒ Object 



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 307

def ndp_sum_readable
  "0x%04x" % ndp_sum
end

#ndp_taddr ⇒ Object Also known as: ndp_tgt_readable

Get target address in a more readable form.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 286

def ndp_taddr
    self[:ndp_tgt].to_x
end

#ndp_taddr=(str) ⇒ Object

Set the target address in a more readable form.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 291

def ndp_taddr=(str)
    self[:ndp_tgt].read_x(str)
end

#read(str) ⇒ Object

Reads a string to populate the object.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 237

def read(str)
  force_binary(str)
  return self if str.nil?
  self[:ndp_type].read(str[0,1])
  self[:ndp_code].read(str[1,1])
  self[:ndp_sum].read(str[2,2])
  self[:ndp_reserved].read(str[4,4])
  self[:ndp_tgt].read(str[8,16])
  self[:ndp_opt_type].read(str[24,1])
  self[:ndp_opt_len].read(str[25,1])
  self[:ndp_lla].read(str[26,2])
  self
end

#to_s ⇒ Object

Returns the object in string form.



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# File 'lib/bettercap/monkey/packetfu/utils.rb', line 232

def to_s
  self.to_a.map {|x| x.to_s}.join
end