[HECnet] User mode DECnet (was Multinet Tunnel Connections to SG1::)

[Mark Benson]

On 7 Jun 2012, at 15:15, Bob Armstrong <bob at jfcl.com> wrote:

Johnny Billquist wrote:
Are you actually talking now about implementing a DECnet stack on a machine
in user mode?
That is definitely not doable.

Is that really true?   I don't believe it.   How about an Einstein style
"gedanken experiment" - put simh on a machine (which is an entirely user
mode program), load VMS on it.   Bingo - a user mode implementation of a
DECnet stack.

I don't mean this as a practical solution to DECnet on Linux, but it's
clearly possible to get all the Ethernet access you need to implement DECnet
in a user mode program.

N.B.   "user mode" is not the same as "run as root".   Promiscuous mode
requires root privilege, but that's still a user mode program

That's what made me peopose that it may be possible. SimH already
implements the underlying ethernet wizardry to allow DECnet and other
ethernet-based protocols to operate inside the simulator.

-- 
Mark Benson

http://markbenson.org/blog
http://twitter.com/MDBenson