Is there any source code(or open source protocols) implementing the
whole OSI 7 model ?

Regards
Tom

In article <1189910525.516828.179200@n39g2000hsh.googlegroups .com>,
lostlander <lostlander.tom@gmail.com> wrote:

> Is there any source code(or open source protocols) implementing the
> whole OSI 7 model ?

I don't think any protocols were ever specified for some of the layers.
In particular, I can't recall a Session Layer protocol ever being
specified.

--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
*** PLEASE don't copy me on replies, I'll read them in the group ***

On Sep 15, 10:42 pm, lostlander <lostlander....@gmail.com> wrote:
> Is there any source code(or open source protocols) implementing the
> whole OSI 7 model ?
>
> Regards
> Tom

In another life I remember an extensive implemtation by a company
called Marben. I think Sun distributed it for a while

On 15 Sep 2007, Barry Margolin <barmar@alum.mit.edu> wrote:

> In article
> <1189910525.516828.179200@n39g2000hsh.googlegroups .com>,
> lostlander <lostlander.tom@gmail.com> wrote:
>
>> Is there any source code(or open source protocols) implementing
>> the whole OSI 7 model ?
>
> I don't think any protocols were ever specified for some of the
> layers. In particular, I can't recall a Session Layer protocol
> ever being specified.

Well, there's X.225, Session Protocol Specification for Systems
Interconnection for CCITT Applications. Actually, there were specs for
all the upper layers. I happen to be working on a project right now
that uses all 7 layers of the OSI stack right on up to FTAM file
transfer at the application layer! Loads of fun ;-)

Dave

--
D.a.v.i.d T.i.k.t.i.n
t.i.k.t.i.n [at] a.d.v.a.n.c.e.d.r.e.l.a.y [dot] c.o.m

On 15 Sep 2007, lostlander <lostlander.tom@gmail.com> wrote:

> Is there any source code(or open source protocols) implementing the
> whole OSI 7 model ?

There was some fairly old code floating around called ISODE which had
all the upper layers. It was open source. Maybe you can track down a
copy.

http://en.wikipedia.org/wiki/ISODE

Dave

--
D.a.v.i.d T.i.k.t.i.n
t.i.k.t.i.n [at] a.d.v.a.n.c.e.d.r.e.l.a.y [dot] c.o.m

Barry Margolin <barmar@alum.mit.edu> writes:

> In article <1189910525.516828.179200@n39g2000hsh.googlegroups .com>,
> lostlander <lostlander.tom@gmail.com> wrote:
>
>> Is there any source code(or open source protocols) implementing the
>> whole OSI 7 model ?
>
> I don't think any protocols were ever specified for some of the layers.
> In particular, I can't recall a Session Layer protocol ever being
> specified.

No, all the layers had some specifications, at least in draft form.
Most had multiple, competing specifications from the various
independent groups involved.

One of the problems with OSI was that it was very expensive to
develop. Just to start, you had to buy expensive specs, and then you
had to deal with the complexity, not just in terms of implementing
complicated protocols, but also in negotiating the sea of
specifications and potential markets to figure out what you needed to
implement to begin with. Towards the very end, a couple of these
issues were resolved -- cheap spec prices for universities, for
example -- but it was way too little, way too late. So the normal
sources for commonly available code never got engaged. If you find
available source code, it will probably be something abandoned by a
big company (and you know how big companies can be about giving away
anything, no matter how useless to them).

Another issue with "the whole OSI 7 model" is that it was rarely if
ever implemented as a monolith. Typically the transport layers would
have been one thing -- often purchased from a third party, typically
in the kernel with other transport protocols -- while the upper layers
would have been something quite distinct, normally in a user
application. So if you go looking, keep in mind that you're probably
looking for two pieces. I wouldn't be at all surprised if you could
turn up a Unix implementation of TP4 (the connection oriented
transport layer), but the upper layers may be lost to history. And you
won't catch me crying about it....

-don