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OS/2 Shareware BBS: 35 Internet
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PKTSEND.DOC
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1995-02-24
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Packet Send Utility
FTP Emulation Software, and Demo Code.
Overview:
Use this software for demonstration in a TCP/IP network environment.
Its purpose is to provide an interface to an FTP packet driver and enable
access to ethernet addresses at the physical layer of the ISO/OSI network
model.
Using an FTP packet driver, PKTSEND.COM transmits raw packets
directly to the ethernet via DOS interrupt calls. The text mode interface
accepts addresses and data from the user, and passes the data to FTP through
interrupt 60h (interrupts 60h through 80h are used by FTP drivers).
Use PKTSEND.COM along with a network utility such as SNOOPER to observe
network activity. Use this utility in a teaching environment to demonstrate
packet level communication on ethernet networks.
Usage:
Addresses entered in PKTSEND are sent to an FTP packet driver as broadcasts
with specific source and destination addresses. Students can easily observe
the results of their keystrokes using a second network terminal.
Install FTP network drivers on two terminals, run PKTSEND.COM on one of
them, and SNOOPER on a second. Data sent over the ethernet via PKTSEND.COM
will be intercepted by SNOOPER to be recorded.
When no network is installed, load DUMMY.COM into memory first to confirm
that PKTSEND software is working. This is a TSR program loaded at DOS that
accepts packets via FTP interrupts and discards them (i.e. a null device
driver). Using PKTSEND.COM and DUMMY.COM together demonstrates the intended
use of this software.
Acknowledgments:
Internet: patrick@xiris.com