Commit 2808493c authored by David Woodhouse's avatar David Woodhouse

Add copying files, readme explaining licensing

parent 9930aa5b
Pending legal review.
LGPLv2.1 for most parts, possibly Apache2 for EAS dæmon.
This project is licensed under the version 2.1 of the GNU Lesser
General Public License. Certain parts are also dual-licensed under
the version 2 of the Apache License.
For more details, see the copyright headers in the files themselves,
and the README file for an overview.
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This diff is collapsed.
This project consists of five distinct parts:
1. eas-daemon/
A core library implementing the ActiveSync protocol, along with a
dæmon which exposes all necessary functionality via DBus. This
code is dual-licensed under both LGPLv2.1+ *and* the Apache v2
licence.
2. libeasmail/ libeassync/ libeasaccount/
Client libraries used to access the above dæmon over DBus, and to
manage accounts in GConf. These libraries are licensed under
LGPLv2.1+.
3. syncevolution/
A SyncEvolution plugin. This may well move to the SyncEvolution
code base once the EAS client library APIs have stabilised, but
for now is stored locally for ease of development. It is licensed
under LGPLv2.1 (or LGPLv3 at your option).
4. camel/
A Camel (Evolution) email back end. As with the SyncEvolution
plugin, this will probably be moved our of this repository and
merged into the evolution-data-server package once the library
APIs have stablised. It is also licensed under LGPLv2.1+.
5. meego/
A graphical configuration tool designed to integrate as a module
into the Qt-based MeeGo Settings application. To match the rest of
the MeeGo UI code, this part is licensed under Apache v2.
PATENT LICENSING
================
It is rumoured that in some parts of the world, there are patents
which cover the use of ActiveSync from a mobile client.
No evidence has been discovered which can confirm the truth of this;
nobody who repeats these rumours can cite specific patents which read
on the methods herein.
Furthermore, a technical assessment of the code would suggest that
there is nothing here that could *possibly* be covered by a patent,
*even* under the corrupt and widely-abused US patent system.
Thus, the rumoured patents covering the ActiveSync implementation
would seem to be either on the server side where they do not affect
us, or on obscure parts of the protocol which we have not needed to
implement in this client. For the basic email and calendar
synchronisation, there is *nothing* here which is not *completely*
trivial and obvious, and which has not been done elsewhere, long ago.
If you are contacted by any individual or corporation claiming to have
patents covering any of the code herein, and attempting to extort
payment from you in return for licensing of their alleged patents,
they are likely to be committing the criminal offence of fraud. You
should, in the first instance, refer the matter to your local
constabulary. Either they do not have patents which truly read upon
this code and are simply trying to extort money with menaces, or if
they *do* have patents in some parts of the world which read on this
code base, they must have obtained those patents (or the relevant claims
in those patents) by misrepresentation. Which makes it fraud.
You may well find that such a extortionist would refuse to specify
which patents they claim are relevant; they just want to threaten you
in the expectation that you will pay them off without investigating
their claims. You should certainly not even *contemplate* paying for
a patent licence without demanding to see specific details of the
alleged patents which apply in your own country, and making your own
assessment as to whether those patents are valid and whether they
truly do read on this code base.
Nevertheless, the copyright licensing of this code base *DOES* allow
you to obtain a patent licence, if you see fit to support corrupt
business practices by doing so, and if your local laws do not prevent
you from making payments which contribute to corruption in foreign
countries.
Although the LGPLv2.1 alone would prevent you from distributing this
code if you had paid for a limited patent licence, the existence of
the dual-licence Apache v2 option means that you may continune to
distribute the code under *that* licence, even if you have paid for
patent licensing.
That is the reason for the dual LGPLv2.1 + Apachev2 licensing on the
libeas library and the ActiveSync dæmon which implement the core of
the protocol.
NOTE: This is not legal advice. But it *is* common sense.
David Woodhouse <dwmw2@infradead.org>
(Not speaking for my employer,
for any ex-employer(s),
or any future employer(s)).
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