I guess that kind of depends on what you are hoping to achieve with your
licensing. Zero licensing on commercial software is just asking to be
misused. All licensing systems will be compromised at some point if the
effort is worth it as we know so my goal would be to implement something
that encourages 'honest' users to remain honest. I think a simple check
against the domain or a mac address is worth the initial effort where as
licensing a commercial solution might not be for very low cost plugins
or even free software that you want to keep control of in terms of
distribution.
Steve
Colin Doncaster wrote:
Forgive me for asking but why wouldn't you just look at licensing a commercial available licensing system like RLM or similar. I would say that the amount of time spent building and maintaining your own would be far more costly.
Cheers
On 2012-10-24, at 10:57 AM, Steve Booth <[email protected]> wrote:
Remember that it's possible to have 'virtual' Ethernet devices with
synthetic MAC addresses. There is no guarantee that what the user sees as
network 'interfaces' are, in fact, actual physical hardware on the machine.
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Stephen
Newbold
Sent: Wednesday, October 24, 2012 1:30 AM
To: [email protected]; Nuke plug-in development discussion
Subject: Re: [Nuke-dev] Plugin Licencing
Hi Pierre,
Could you not just check all the mac addresses returned? If one matches then
you are good? If the network card is removed/changed I guess they need to
get a new licence.
Steve
Pierre Jasmin wrote:
All OS have a way to enumerate all mac addresses (sometimes there is
6, and eth0 can vary over time including if you have two ports by just
plugging the cable in other port) for you to strcmp The other scheme I
have seen is to use disk ID, this is more common for temp licenses
then permanent one though.
Pierre
On 10/23/2012 9:15 AM, Steve Booth wrote:
Mike,
If you're on a commercial workstation, and are not using a plug-in
network adapter card, then the MAC address will be unique, although
some (most?) workstations have not one, but **two** network
interfaces, so there will actually be two distinct MAC addresses. If,
however, you're using a plug-in card, you run the risk of crashing
your software if the network hardware is upgraded.
It is also possible, on Intel CPUs at least (not sure about AMD) to
obtain the CPU serial number. Microsoft has the '__cpuid' macro that
generates in-line, the MASM to obtain this:
http://msdn.microsoft.com/en-us/library/hskdteyh%28v=vs.100%29.aspx
That ties your software to a specific CPU (assuming CPU
identification is enabled in the BIOS), and is much more reliable.
Steve
*From:* [email protected]
[mailto:[email protected]] *On Behalf Of
*Stephen Newbold
*Sent:* Tuesday, October 23, 2012 1:03 AM
*To:* Nuke plug-in development discussion
*Subject:* Re: [Nuke-dev] Plugin Licencing
Hi Steve,
I can see how this would work when tying the plugin to a specific
domain but how would you approach locking the plugin to a single
machine? Use the MAC address?
Steve
Steve Booth wrote:
Mike,
How you do it depends on the OS platform you're using. Generally
speaking, what I do is to get the domain name from the network stack
(or just using the Win32 API under Windows), and compare it to a
const string. Thus, if you're working within, say, Disney Animation,
and the compositing domain is comp.disney.com, for example, just
error() if the domain does not match this string.
Hope that helps.
Steve
--
Stephen Newbold
Compositing Lead - Film
MPC
127 Wardour Street
Soho, London, W1F 0NL
Main - + 44 (0) 20 7434 3100
www.moving-picture.com
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_______________________________________________
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--
Stephen Newbold
Compositing Lead - Film
MPC
127 Wardour Street
Soho, London, W1F 0NL
Main - + 44 (0) 20 7434 3100
www.moving-picture.com
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