On Mon, 17 Dec 2007, Renzo Davoli wrote:
Inter Process Networking (PATCH):
1. WHAT IS IPN?
---------------
IPN is a new address family designed for one-to-many, many-to-many and
peer-to-peer communication among processes.
Berkeley sockets have been designed for client-server or point-to-point
communication; AF_UNIX does not support multicast/broadcast. AF_IPN
does, in a simple, efficient but extensible way.
IPN is an Inter Process Communication paradigm where all the processes
appear as they were connected by a networking bus.
On IPN, processes can interoperate using real networking protocols
(e.g. ethernet) but also using application defined protocols (maybe
just sending ascii strings, video or audio frames, etc).
IPN provides networking (in the broaden definition you can imagine) to
the processes. Processes can be ethernet nodes, run their own TCP-IP stacks
if they like (e.g. virtual machines), mount ATAonEthernet disks, etc.etc.
IPN networks can be interconnected with real networks or IPN networks
running on different computers can interoperate (can be connected by
virtual cables).
IPN is part of the Virtual Square Project (vde, lwipv6, view-os,
umview/kmview, see wiki.virtualsquare.org).
other then the fact that this is bi-directional, how is this better then
using pipes and splice?
wouldn't it be better to just add the ability for multiple writers to send
to the same pipe, and then have all of them splice into the output of that
pipe? this would give the same data-agnostic communication that you are
looking for, and with the minor detail that software would have to filter
out messages that they send, would appear to meet all the goals you are
looking at, useing existing kernel features that are designed to be very
high performance.
David Lang
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