Class: UDPHeader

Inherits:
Object
  • Object
show all
Defined in:
lib/sflow/lib/sflow/models/udpheader.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(packet, offset = 0, length = nil, lower = nil) ⇒ UDPHeader

Returns a new instance of UDPHeader.



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# File 'lib/sflow/lib/sflow/models/udpheader.rb', line 6

def initialize(packet,offset=0,length=nil,lower=nil)
  @packet = packet
  @offset = offset
  header = packet.unpack("x#{offset}n4")
  @sndr_port = header[0]
  @dist_port = header[1]
  @packet_length = header[2]
  @checksum = header[3]
  @data_length = @packet_length - 8
  @lower = lower
end

Instance Attribute Details

#checksum ⇒ Object (readonly)

Returns the value of attribute checksum.



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# File 'lib/sflow/lib/sflow/models/udpheader.rb', line 3

def checksum
  @checksum
end

#data_length ⇒ Object (readonly)

Returns the value of attribute data_length.



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# File 'lib/sflow/lib/sflow/models/udpheader.rb', line 3

def data_length
  @data_length
end

#dist_port ⇒ Object (readonly)

Returns the value of attribute dist_port.



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# File 'lib/sflow/lib/sflow/models/udpheader.rb', line 3

def dist_port
  @dist_port
end

#lower ⇒ Object (readonly)

Returns the value of attribute lower.



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# File 'lib/sflow/lib/sflow/models/udpheader.rb', line 3

def lower
  @lower
end

#packet_length ⇒ Object (readonly)

Returns the value of attribute packet_length.



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# File 'lib/sflow/lib/sflow/models/udpheader.rb', line 3

def packet_length
  @packet_length
end

#sndr_port ⇒ Object (readonly)

Returns the value of attribute sndr_port.



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# File 'lib/sflow/lib/sflow/models/udpheader.rb', line 3

def sndr_port
  @sndr_port
end

Instance Method Details

#data ⇒ Object 



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# File 'lib/sflow/lib/sflow/models/udpheader.rb', line 18

def data
  if(@packet_length>8)
    @packet[@offset+8..@offset+@packet_length]
  else
    ""
  end
end

#to_s ⇒ Object 



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# File 'lib/sflow/lib/sflow/models/udpheader.rb', line 26

def to_s
  "" <<
  "UDP Header\n" <<
  "  Sender Port     : #{@sndr_port}\n" <<
  "  Distication Port: #{@dist_port}\n" <<
  "  Packet Length   : #{@packet_length}\n" <<
  "  Checksum        : #{@checksum}\n" <<
  "  (Data Length)   : #{@data_length}"
end