Network Load Generator

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Network Load Generator

• Michael Gustus
• Dmitriy Mosheyev
• Supervisor Alina Maor

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Implementation

• ????? ????????? UDP
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• ????? ?????? ?????? ??? Java
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• GUI
• ????? ?-Network Programming

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UDP protocol

• This User Datagram Protocol (UDP) is defined to
  make available a datagram mode of packet-switched
  computer communication in the environment of an
  interconnected set of computer networks. This
  protocol assumes that the Internet Protocol (IP)
  is used as the underlying protocol.
• This protocol provides a procedure for
  application programs to send messages to other
  programs with a minimum of protocol mechanism.
• The protocol is transaction oriented, and
  delivery and duplicate protection are not
  guaranteed.
• Applications requiring ordered reliable delivery
  of streams of data should use the Transmission
  Control Protocol (TCP).

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UDP protocol (cont.)

• User Interface
• A user interface should allow
• the creation of new receive ports,
• receive operations on the receive ports that
  return the data octets and an indication of
  source port and source address,
• and an operation that allows a datagram to be
  sent, specifying the data, source and destination
  ports and addresses to be sent.
• IP Interface
• The UDP module must be able to determine the
  source and destination internet addresses and the
  protocol field from the internet header. One
  possible UDP/IP interface would return the whole
  internet datagram including all of the internet
  header in response to a receive operation. Such
  an interface would also allow the UDP to pass a
  full internet datagram complete with header to
  the IP to send. The IP would verify certain
  fields for consistency and compute the internet
  header checksum.

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Main Modules

• Our project consists of 5 major modules
• Server module
• This module establishes the connection to client,
  computes the delta, generates and sends required
  packets with required interval to client.
• Client module
• This module responsible for initializing the
  connection with server, sending him the desirable
  parameters , receiving the packets from server
  and transfers the packet data to statistics
  module.
• Server GUI module
• Displays connection information.
• Client GUI module
• Responsible for collecting input from user , and
  display statistics results.
• Statistics module
• Responsible for collecting various statistics
  about network load.

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Delta interval computation

• Initially delta will be computed by formula
• Every 10 packets the delta value will be updated
  to average interval time between those 10
  packets. This way if the conditions in the
  network have been somehow changed client will
  adjust to those changes and wont report lost
  packets due to that reason.

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Statistics and Measurements

• Statistics that will be gathered
• Max packet delay.
• Min packet delay.
• Average packet delay.
• Distribution of average packet delay by user
  given interval of time (for e.g. every hour)

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User Guide

• Pick 2 computers in the network. Start the server
  on one of them, and the client on the another.
• The server shows its IP address and the desired
  port he listens to.

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User Guide

• In the client window enter the servers IP
  address and port (as seen on the servers
  window).

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User Guide

• Insert the packet size (in bytes), and packet
  arrival frequency (in bit/sec).

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User Guide

• Press the Start button.
• Enjoy the statistics.

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Server Screen
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Client Screen
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