25 Oct
2023
25 Oct
'23
6:12 p.m.
John,
Thank you for your work!
Finally a simple way to have a linux host with an up-to-date kernel (not just the pi:s)
I made the installed on a fresh Debian Bookworm
Two minor issues:
The link to the git site below seems to include the last "GT" sign which gives
the wrong URL to the site
The install script bails on adding additional hosts in the local db as below with an error
message and the continues.
Enter the node's address: area.node (e.g. 1.1) : 34.1023
Enter its node name : A34RTR
./BuildAndInstall.sh: command substitution: line 471: unexpected EOF while looking
for matching `"'
Other than that it seems to works just fine!
BR
/t
Den 2023-10-25 04:50 skrev "John Forecast" <john(a)forecast.name
<mailto:john@forecast.name>> följande:
Sometime around mid-2022 the Linux kernel developers decided to remove the DECnet code
from the Linux
kernel. Kernel 6.0.x was the last release which included source code for a DECnet
implementation. More
recently, there has been some discussion around removing the code from the Long Term
Support kernels.
These changes mean that the repository I have been maintaining at
<https://github.com/JohnForecast/RaspbianDECnet>
<https://github.com/JohnForecast/RaspbianDECnet>> can no longer be installed
on recent releases.
Over the past year or so, I have been working on a replacement for this repository with
the following
characteristics:
- Designed to be built as an external kernel module
This simplifies and speeds up the installation since we no longer need to rebuild the
entire
kernel.
- Can only be built as an ethernet endnode
Again this substantially simplifies the kernel code. The routing code was alway marked as
“experimental” and I never tried to get it running. If you need a DECnet router, pyDECnet
or
Route20 are much better solutions.
- Minimize the use of Linux kernel frameworks
Many of the problems with keeping RaspbianDECnet running between Linux versions
were changes to the kernel framework APIs. By limiting the use of these APIs I am hoping
that the kernel module will need fewer changes to keep up with kernel changes. So far,
I have had to make one additional conditional code change at kernel 6.5 and that was in
the socket layer so all networking code would need to be changed.
In addition to a new kernel module there have been a number of changes to the userland
code:
- What used to be “fal2” is now the default file access listener. The old “fal” is still
available in the
“fal-old” directory
- What used to be “nml2” is now the default and only network management listener.
- There is now a subset implementation of “ncp” which is sufficient to support all of the
requests
available from the Linux network management listener. It does implement a “tell” prefix so
all
of these commands may be issued to remote systems. In addition, it implements
“ncp copy known nodes from <node name/address>” to update the local node name
database.
- The new kernel module now supports node counters as defined in the Network Management
Specification and the ncp/nml combination are able to display and zero them.
- The installation procedure is no longer targeted solely at Raspberry Pi releases. The
current
procedure supports installation on systems derived from Debian or Fedora although only a
limited number of distributions have been tested (see README.DECnet).
This new release is available at:
<https://github.com/JohnForecast/LinuxDECnet>
<https://github.com/JohnForecast/LinuxDECnet>>
and should be considered to be in Beta test at this time. See README.DECnet in the top
level directory
for more information and installation instructions.
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