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- GNIP - (G)NIP is a (N)ew (I)nterface for (P)ING
- ===============================================
-
-
- Purpose
- -------
-
- The GNIP program was created to provide two new features not currently
- available with the LANtastic 6.0 'NET PING' command:
-
- 1. GNIP displays the serial number of each node found on the network.
- This allows a network administrator to quickly determine which machines on
- the network are using which serial numbers.
-
- 2. To return errorlevel codes which can be used in DOS batch files for
- determining presence of a node and whether the node is a LANtastic server.
-
-
- How PING Works
- --------------
-
- The LANtastic 6.0 PING interface uses network broadcast datagrams to identify
- nodes by their machine names. The REDIR program listens for PING query
- datagrams that match its name and respond with a datagram containing
- information about the node, including version, serial number, and whether
- SERVER is currently running. Once a node has been identified, a "be quiet"
- datagram is sent to it. Queries and "be quiet" datagrams are sent until the
- ping response buffer fills or no further responses are received.
-
-
- Caveats
- -------
-
- 1. The PING interface is only available in LANtastic 6.0 or higher. Earlier
- versions will not run GNIP and will not respond to PING query datagrams.
-
- 2. Datagrams are by definition a "non-reliable" transport mechanism. They
- can be lost due to collisions on the network or if the receiver is busy
- doing something else, like processing another datagram. Although the PING
- interface usually finds all the matching nodes, network performance and
- traffic can affect results.
-
- 3. Only one node on the network can issue PING broadcasts at any one time.
- A PING reservation and release broadcast is used to arbitrate among multiple
- nodes. GNIP will automatically try twice before returning a "Network Busy"
- error.
-
- 4. A LANtastic node does not reply to its own PINGs. When enumerating
- serial numbers, you can type REDIR /DESCRIBE to see the serial number of
- the node you are using.
-
- 5. Wildcard PINGs will cause a burst of datagrams on the network,
- determined by how many nodes match the wildcard, and how readily they
- recognize a "be quiet" datagram. A non-wildcard, single-node ping will not
- cause any significant network traffic.
-
-
-
- Syntax
- ------
-
- The GNIP command line looks like:
-
- GNIP <Machine> {A=Adapter} {N=Number} {Raw} {Silent}
-
-
- Where:
-
- <Machine> is the machine name of the node or nodes on the network that
- you wish to identify. You can PING for nodes beginning with a common
- string by appending the '*' wildcard character to the string or identify
- all nodes on the network by specifying <Machine> with a single '*'. This
- is the only required command line argument.
-
- 'Adapter' is the logical adapter number on which to perform the PING. If
- no adapter is specified, all adapters will be searched.
-
- 'Number' is the number of responses to collect during the PING. A
- node may reply several times before seeing a "be quiet" message, so it is
- best to specify N to be at least twice the number of nodes you expect to
- discover. The default number is 1, which is sufficient for a PING of a
- single node. The maximum N is 910. Specifying a larger value will return
- a "Not enough memory" error.
-
- The 'Raw' command line switch turns off filtering of multiple responses.
- This switch can be used to identify network nodes that are not receiving
- "be quiet" messages due to network delays or hardware problems.
-
- The 'Silent' command line switch turns off all displays other than
- command line or memory errors. This switch can be used to test for a
- single node from within a batch file and testing ERRORLEVEL for the results
- of the PING. See below for a sample batch file.
-
-
- Display
- -------
-
- The ping response data is displayed in five columns. A sample display looks
- like this:
-
- Machine Adapter Version Server Serial Number
- TOWER1 0 6.0 √ ABC0001001
-
-
- Examples
- --------
-
- GNIP TOWER1
-
- Looks for a machine named 'TOWER1' on any adapter.
-
-
- GNIP TOWER* A=0 N=10
-
- Looks for any machines with names starting with 'TOWER' on adapter 0. A
- total of ten responses will be accepted before filtering multiple responses.
-
- GNIP * N=50
-
- Identifies all machines on all adapters. A total of 50 responses will be
- accepted before filtering out multiple responses.
-
- GNIP * N=200 Raw
-
- Identifies all machines on all adapters. A total of 200 responses will be
- accepted. Multiple responses will be displayed.
-
-
- ERRORLEVEL Values
- -----------------
-
- GNIP will return one of six error codes depending on the results of a
- non-wildcard PING:
-
- 0 - Indicates that the PING found the specified node and it is running
- SERVER.
-
- 1 - Is the DOS error code for Invalid function. This usually means that
- a LANtastic 6.x REDIR is not present on the machine trying to run
- GNIP.
-
- 8 - Is the DOS error code for Out of memory. N was greater than 910 or
- there was insufficient DOS memory.
-
- 54 - Is the DOS error code for Network Busy. This means that another node
- on the network is currently using PING.
-
- 148 - Is the error code returned if there were no responders to the PING.
-
- 149 - Is the error code returned if the specified node was found but it
- is only running REDIR. It is not running SERVER.
-
-
- GNIP can return error codes 1, 8, 54 or 148 above for wildcard PINGs. A
- return code of 0 only means that a wildcard PING found at least one node.
-
- Sample Batch File
- -----------------
-
- Here is a sample batch file that tests the error code returned by GNIP.
- Note the use of the 'Silent' command line switch to turn off any display
- and that errorlevels must be tested in descending order.
-
- @echo off
- gnip %1 silent
- if errorlevel 149 goto foundw
- if errorlevel 148 goto noresp
- if errorlevel 54 goto busy
- if errorlevel 1 goto invalid
- echo %1 is a server
- goto end
- :invalid
- echo REDIR not present
- goto end
- :busy
- echo Network busy
- goto end
- :foundw
- echo %1 is a workstation
- goto end
- :noresp
- echo %1 not found
- :end
- ------------------------------------------------------------------
- ARTISOFT, Inc. makes no warranties as to the completeness or accuracy of this
- document. LANtastic is a trademark of ARTISOFT, Inc. Brand names, company
- names, and product names are trademarks or registered trademarks of their
- respective companies.
-
-
-
-