home *** CD-ROM | disk | FTP | other *** search
- File ODIPKT.DOC
-
- NAME
- ODIPKT
- Translate Open Data-Link Interface to Packet Driver interface.
-
- SYNOPSIS
- ODIPKT [ logical_board [ vector ] ]
- ODIPKTpn [ logical_board [ vector ] ]
-
- DESCRIPTION
- ODIPKT provides a Packet Driver API over Novell's Open Data-Link
- Interface (ODI), allowing a single network adapter to service IPX,
- TCP/IP, and other protocol stacks which use packet drivers. ODIPKT
- understands Ethernet, Token Ring, and ARCnet frame types. Ethernet and
- Token Ring frames are passed unchanged to packet driver applications, but
- ARCnet frames are internally mapped to Ethernet. Thus, packet driver
- applications do not need specific knowledge of ARCnet in order to operate
- in such environments.
-
- The logical_board argument indicates which logical adapter ODIPKT should
- bind to. Under ODI, there is one logical adapter per frame type. There
- may be multiple physical adapters, and multiple frame types per physical
- adapter. The logical adapter number starts at zero and increases by one
- for each frame type. For example, if a system contained two physical
- adapters with two frame types each, there would be four logical adapters
- numbered 0-3. The frame types are specified in the NET.CFG file which
- must be in the current directory (or on the APPEND path) when the ODI
- drivers are loaded.
-
- Typically, the frame type used by default by Netware on a given adapter
- will not be appropriate for TCP/IP. The correct frame type for TCP/IP on
- Token Ring is TOKEN-RING_SNAP and the correct frame type for TCP/IP on
- Ethernet is almost always ETHERNET_II. Assuming an existing installation
- with one adapter running the default Netware frame type, it will usually
- be necessary to define a second frame type (as listed above) and to
- specify the logical_board argument as 1. An exception to this rule is
- ARCnet which uses only one frame type. Below is a NET.CFG entry for a
- 3c501 using the default address and interrupt. Other Ethernet adapters
- would use similar configurations:
-
- Link driver 3c501
- envelope type ETHERNET_802.3
- envelope type ETHERNET_II
-
- Given the above entry, the logical_board argument of ODIPKT would be 1.
- Token Ring uses different frame types:
-
- Link driver token
- envelope type TOKEN-RING
- envelope type TOKEN-RING_SNAP
-
- Again, the logical_board should be specified as 1 for this nexample.
- ARCnet installations require no frame-type definitions and should use a
- logical_board of 0.
-
- Because ODIPKT.COM uses buffers provided by the Link Support Layer, the
- Link support section of NET.CFG must specify at least one buffer of a
- size appropriate to the medium in use. Some adapters require more
- buffers for optimal performance, e.g., the 3c503 can use at least five
- during reception of back-to-back packets. The following lines configure
- five buffers large enough for Ethernet:
-
- Link support
- Buffers 5 1600
-
- The correct buffer size for Token Ring will vary depending on the
- installation. Specifying too small a buffer size will result in
- unpredictable behavior.
-
- Vector is the packet driver interrupt at which to provide service. The
- default is 105 and the parameter is decimal.
-
- ODIPKT.COM should be loaded after lsl.com and the adapter-specific
- driver(s). It must, of course, be loaded before the packet driver
- applications which use it. The Netware shell and ipxodi.com can be
- loaded before or after the ODIPKT.COM program.
-
- ODIPKTPN.COM supports an older version of the ODI specification as used
- in Farallon's PhoneNET Talk product. Operation of ODIPKTPN.COM is
- identical to that of ODIPKT.COM but configuration of NET.CFG is somewhat
- different: no ``envelope'' statements are required or allowed. Because
- multiple frame types are not supported, ODIPKTPN.COM treats all Ethernet
- cards as ETHERNET_II.
-
- AUTHOR
- Dan Lanciani
- 185 Atlantic Road
- Gloucester, MA 01930
-
- The following copyright notice appears in the ODIPKT.ASM source file:
-
- ; ODIPKT.ASM - Adapter provides Packet Driver interface over ODI
- ;
- ; (c) Copyright Daniel D. Lanciani 1991-1994. All rights reserved.
- ;
- ; This unmodified source file and its executable form may be used and
- ; redistributed freely. The source may be modified, and the source or
- ; executable versions built from the modified source may be used and
- ; redistributed, provided that this notice and the copyright displayed by
- ; the exectuable remain intact, and provided that the executable displays
- ; an additional message indicating that it has been modified, and by whom.
- ;
- ; Daniel D. Lanciani releases this software "as is", with no express or
- ; implied warranty, including, but not limited to, the implied warranties
- ; of merchantability and fitness for a particular purpose.
- ;
- ; Please send bug reports to:
- ; Dan Lanciani
- ; 185 Atlantic Road
- ; Gloucester, MA 01930
- ; USA
- ; Voice: +1 508 283-4974
- ; Email: ddl@harvard.harvard.edu (Internet)
-
- USING ODIPKT WITH MS-DOS KERMIT
-
- ODIPKT is normally not needed, since MS-DOS Kermit 3.13 and later includes
- its own ODI interface, and can run on top of your network board's ODI driver.
-
- Under Microsoft Windows, however, unless Kermit is "locked in memory", Windows
- will move it around causing system crashes (or worse) when the ODI driver
- goes to write incoming data into Kermit's memory space (this is not a Kermit
- problem -- it would happen with any network application). Therefore we need
- to run Kermit over the WINPKT "shim". But WINPKT goes over a packet driver,
- not an ODI driver. That's where ODIPKT comes in -- it makes the ODI driver
- look like a packet driver to WINPKT, which, in turn feeds packets to Kermit.
-
-