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module RubySMB
module SMB1
# Represents the ParameterBlock portion of an SMB1 Packet. The ParameterBlock will
# always contain a word_count field that gives the size of the rest of
# the data block in words.
class ParameterBlock < BinData::Record
endian :little
uint8 :word_count, label: 'Word Count', initial_value: -> { calculate_word_count }
# Class method to stub word count calculation during
# lazy evaluation.
#
# @param [Fixnum] will always return 0
def self.calculate_word_count
0
end
# Returns the name of all fields, other than word_count, in
# the ParameterBlock as symbols.
#
# @return [Array<Symbol>] the names of all other ParameterBlock fields
def self.parameter_fields
fields = self.fields.collect(&:name)
fields.reject { |field| field == :word_count }
end
# Calculates the size of the other fields in the ParameterBlock
# in Words.
#
# @return [Fixnum] The size of the ParameterBlock in Words
def calculate_word_count
total_count = 0
self.class.parameter_fields.each do |field_name|
field_value = send(field_name)
total_count += field_value.do_num_bytes
end
total_count.to_i / 2
end
end
end
end
Version data entries
45 entries across 45 versions & 1 rubygems