Class: Rex::Post::Meterpreter::PacketParser

Inherits:
Object
  • Object
show all
Defined in:
lib/rex/post/meterpreter/packet_parser.rb

Overview

This class is responsible for reading in and decrypting meterpreter packets that arrive on a socket

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ PacketParser

Initializes the packet parser context.

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# File 'lib/rex/post/meterpreter/packet_parser.rb', line 18

def initialize
  reset
end

Instance Attribute Details

#cipher ⇒ Object (protected)

:nodoc:

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# File 'lib/rex/post/meterpreter/packet_parser.rb', line 55

def cipher
  @cipher
end

#packet ⇒ Object (protected)

:nodoc:

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# File 'lib/rex/post/meterpreter/packet_parser.rb', line 55

def packet
  @packet
end

Instance Method Details

#recv(sock) ⇒ Object

Reads data from the socket and parses as much of the packet as possible.

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# File 'lib/rex/post/meterpreter/packet_parser.rb', line 32

def recv(sock)
  raw = nil
  if self.packet.raw_bytes_required > 0
    while (raw = sock.read(self.packet.raw_bytes_required))
      self.packet.add_raw(raw)
      break if self.packet.raw_bytes_required == 0
    end
  end

  if self.packet.raw_bytes_required > 0
    if raw == nil
      raise EOFError
    else
      return nil
    end
  end

  packet = self.packet
  reset
  packet
end

#reset ⇒ Object

Resets the parser state so that a new packet can begin being parsed.

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# File 'lib/rex/post/meterpreter/packet_parser.rb', line 25

def reset
  self.packet = Packet.new(0)
end