| To: | |
|---|---|
| Subject: | Re: [ts-7000] RE: ts-7800 how do I make 4 (at least 2) identical network stacks? |
| From: | Walter Marvin <> |
| Date: | Wed, 6 Nov 2013 07:30:24 -0800 (PST) |
$500. The code would be 10-20 lines of IPTables code. You can see sample of
IPtTables code anywhere on the Web Start Time Dec 1 finish Dec 7 Must have
access to a TS7800 in that period
--------------------------------------------
On Wed, 11/6/13, Jonathan Leslie <> wrote:
Subject: Re: [ts-7000] RE: ts-7800 how do I make 4 (at least 2) identical
network stacks?
To: "" <>
Date: Wednesday, November 6, 2013, 7:06 AM
need a price and a
sample code of what the application program would look like
to individually address each of the 4 networks.
I
would want a sample programs like:
listen_on_network
-n<network_id> -p<port number>
-m<my_ip_address> send_on_network
-n<network_id> -p<port number>
-i<sendto_ip_address> -m<my_ip_address>
-s<the message>
gcc
compile and link.
where I can launch 4 instances of
the listen_on_network:
for
example:$listen_on_network -nA
-p4999 -m1.1.1.200
&$listen_on_network -nB -p4999
-m1.1.1.200 &$listen_on_network
-nC -p4999 -m1.1.1.200
&$listen_on_network -nD -p4999
-m1.1.1.200 &
and I can send messages to any of 4
devices as
such:
$send_on_network -p4999 -i1.1.1.101
-m1.1.1.200 -nA -s"are you there .101 on the A
network?"$send_on_network
-p4999 -i1.1.1.101 -m1.1.1.200 -nB -s"are you there
also B network
.101?"...
And it all works on a TS-8700 with a
bunch of cat5 cables and no
router.
Contact me:
From: Walter Marvin
<>
To:
Sent:
Wednesday, November 6, 2013 9:39 AM
Subject: Re:
[ts-7000] RE: ts-7800 how do I make 4 (at least 2) identical
network stacks?
I'd be happy to do Th IPTables solution for
you but I would require payment
--------------------------------------------
On Wed, 11/6/13, Jonathan Leslie <>
wrote:
Subject: Re: [ts-7000] RE: ts-7800 how do I make 4 (at least
2) identical network stacks?
To: ""
<>
Date: Wednesday, November 6, 2013, 5:34 AM
yeah, that's a
deal breaker. I've got the whole interface to
code up and handle, I need a quick selector switch
between
networks. Looks like I'm gonna be sticking
with
the winsystems board as multi-IP stacks are simple with
them. The Sad part is I bet there is a simple
solution with the TS-8700 as well, but I don't have
months to work it out. Customer wants a quote now
for
48 units too.
From: Walter Marvin
<>
To:
Sent:
Tuesday, November 5, 2013 10:58 PM
Subject: Re:
[ts-7000] RE: ts-7800 how do I make 4 (at least 2)
identical
network stacks?
A full TCP stack is not a trivial exercise, but
you can steal most of the code, and eliminate most of
it.Still, its a multi month project and much more work
than
IP routing solutions
--------------------------------------------
On Tue, 11/5/13, Jonathan Leslie
<>
wrote:
Subject: Re: [ts-7000] RE: ts-7800 how do I make 4 (at
least
2) identical network stacks?
To: ""
<>
Date: Tuesday, November 5, 2013, 5:09 PM
LOL. I only run
as root. what about this IP stack, what's the
difference
if its running under userspace code or part of the OS?
Seems like to me you are only changing who owns
the
code. So the ts-8700 has 4
NIC's???
From:
"" <>
To:
Sent:
Tuesday, November 5, 2013 8:03 PM
Subject:
[ts-7000] RE: ts-7800 how do I make 4 (at least 2)
identical
network stacks?
You can use raw ethernet frames to communicate
over a specific NIC under Linux. However, this imposes
the
requirement that any application using that method must
run
with root privilege. It also means having to craft a
substantial portion of an already working IP stack in
your
own userspace code. Not trivial.
---In
<> wrote:
when you say raw
ethernet are you talking sockets connections or
something
more "raw" than that?
From: Walter Marvin
<>
To:
Sent: Tuesday, November
5, 2013 10:22 AM
Subject: Re:
[ts-7000] ts-7800 how do I make 4 (at least 2)
identical
network stacks?
The same effect, however, can be done using raw
Ethernet on the receiving side
--------------------------------------------
On Mon, 11/4/13, Eric Robishaw <> wrote:
Subject: Re: [ts-7000] ts-7800 how do I make 4 (at
least
2)
identical network stacks?
To: ""
<>
Date: Monday, November 4, 2013, 9:08 PM
Maybe this is too simple... But why not just use
Udp broadcasting, let each device receive all the
messages
and filter out what they don't need. No need
for
special routing, etc..
On Monday, November 4, 2013, Walter Marvin wrote:
The mac address can be easily found. The problem
here is that Linux won't accept the same sub
network
on
two different interfaces and the IPs of the remote
boxes
can't be changed. This has to be handled by
routing
below the interface level, or raw Ethernet.
--------------------------------------------
On Mon, 11/4/13, Joseph Bouchard <>
wrote:
Subject: Re: [ts-7000] RE: ts-7800 how do I make 4 (at
least
2) identical network stacks?
To:
Date: Monday, November 4, 2013, 5:39 PM
Hi,
I've been following along in the background,
reading
about half of
what's been said, and understanding less, but I
haven't seen anyone
suggest this...
Can you use ARP to an advantage here? The normal way
I've used ARP is
when we have a terminal server which has not yet been
configured... you
arp the mac address to a hostname on your PC, then
connect
to the still
unconfigured box, and configure it. Your computer
knows
how
to find
that remote box by it's mac address, even if the
remote
box doesn't yet
know what it's IP address is yet. Can we do that
here?
Imagine this implementation... You have 4 boxes which
all
want to have
the same IP address, but they all have different MAC
addresses, which
I'll refer to MAC1, MAC2, etc. On your TS7800
you
have
a plain old
single interface eth0 with the address of your
choice,
and
a
typical
socket listener. When a client connects, you
accept(),
like
you
normally would. It's been years since I've
dealt
with the addr structs
the sockets use, but I'm thinking there is a way
to
tie
a mac address to
the socket, or lacking that use arp. At that point
your
file descriptor
is working correctly and you don't care about IP
addresses, you are just
talking back and forth op that open socket.
Maybe I've missed some critical detail, but the
point
is
when you use
mac addresses, and/or hostnames, and you don't
worry
about addresses any
more.
Good luck,
Joe
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