https://github.com/enderdzz/cn3-simulator

network protocol simulate
https://github.com/enderdzz/cn3-simulator

Last synced: 2 months ago
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network protocol simulate

• Host: GitHub
• URL: https://github.com/enderdzz/cn3-simulator
• Owner: enderdzz
• Created: 2016-06-06T15:55:15.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2016-06-11T14:30:39.000Z (over 8 years ago)
• Last Synced: 2024-08-03T01:19:47.321Z (6 months ago)
• Language: C
• Homepage:
• Size: 123 KB
• Stars: 2
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README

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README

        
This package simulates the protocols of Chapter 3 of "Computer Networks 3/e"

by Andrew S. Tanenbaum, published by Prentice Hall PTR, 1996.  It was written

by Andrew S. Tanenbaum and may be freely distributed.

The simulator is compiled by just typing 'make'.  If you want to use gcc

instead of cc, change the line

CC=cc

to

CC=gcc

in Makefile.

It is executed by giving a command line containing the simulation parameters.

The command line has six decimal parameters, as follows:

	sim  protocol  events  timeout  pct_loss  pct_cksum  debug_flags

where

        protocol tells which protocol to run, e.g. 5

        events tells how long to run the simulation

        timeout gives the timeout interval in ticks

        pct_loss gives the percentage of frames that are lost (0-99)

        pct_cksum gives the percentage of arriving frames that are bad (0-99)

        debug_flags enables various tracing flags:

		1	 frames sent 

		2	 frames received 

		4	 timeouts 

		8	 periodic printout for use with long runs 

For example

	sim 6 100000 40 20 10 3

will run protocol 6 for 100,000 events with a timeout interval of 40 ticks,

a 20% packet loss rate, a 10% rate of checksum errors (of the 80% that get

through), and will print a line for each frame sent or received.  Because

each peer process is represented by a different UNIX process, there is

(quasi)parallel processing going on.  This means that successive runs will

not give the same results due to timing fluctuations.

A set of possible student exercises is given in the file exercises.