Re: Socket protocol which does not use Unsupported.kext
Re: Socket protocol which does not use Unsupported.kext
- Subject: Re: Socket protocol which does not use Unsupported.kext
- From: "Gi youl Kim" <email@hidden>
- Date: Fri, 19 Oct 2007 13:26:12 -0700
Hi Micheal:
The drawbacks you posted are the reason why I want to code without
unsupported APIs.
If you implemented SCTP with socket support, let me know the functions
to register sockets which are supported by Apple.
By the way, what is kernel sources and headers and the headers
provided by Apple?
I have xnu-792.18.15 sources and MacOSX10.*.sdk. Do you mean that I
should use MacOSX10.*.sdk?
FYI
My protocol is 'LPX' which has protocol type 0x88ad. LPX is used for
our product which is kind of storage over the ethernet.
Here is plist which I use
<dict>
<key>com.apple.kpi.bsd</key>
<string>8.0.0</string>
<key>com.apple.kpi.iokit</key>
<string>8.0.0</string>
<key>com.apple.kpi.libkern</key>
<string>8.0.0</string>
<key>com.apple.kpi.mach</key>
<string>8.0.0</string>
<key>com.apple.kpi.unsupported</key>
<string>8.0.0</string>
</dict>
On 10/19/07, Michael Tuexen <email@hidden> wrote:
> Hi Aingoppa,
>
> what protocol do you want to implement? We have implemented SCTP, a
> transport protocol. Basically, it is the same code as in the FreeBSD 7.0
> kernel, but with some changes for Mac OS X (locking, timers).
>
> You need to use
>
> <dict>
> <key>com.apple.kernel</key>
> <string>8.10.1</string>
> </dict>
>
> in your Info.plist file and also use some headers from the
> kernel sources instead of the headers provided by Apple.
>
> This all and the usage of net_add_proto() and net_del_proto()
> is an unsupported API and has several drawbacks:
> 1. Apple can change it any time or make it impossible to
> implement transport protocols via NKEs. Fortunately,
> we could use the API from 10.3.9 to 10.4.10. Not sure
> about 10.5.
> 2. You can build a NKE only for one specific Mac OS X version.
> Although, you can build a universal binary for the NKE, it
> does only load on Intel or PPC, because the kernel has different
> versions.
> 3. You really depend on Apple, providing the source for the kernel
> to get the header files you need (you do not need the source files).
> This means you can not delevop/test a Leopard version until Apple
> releases the sources for a Leopard kernel. Not sure when this
> will happen. Currently not even the 10.4.10 sources are available.
>
> Best regards
> Michael
>
> On Oct 19, 2007, at 5:24 PM, Gi youl Kim wrote:
>
> > I want to create a protocol which support socket interface. I could
> > create one using net_add_proto() and net_del_proto().
> > But those functions are included by Unsupported.kext. And worse,
> > some functions like sbfree() was not even exported.
> > So I had to use codes in open xnu source to the protocol work.
> >
> > Can you create a socket protocol which does not use Unsupported.kext?
> > If you can't, how can you create a protocol?
> >
> > Aingoppa.
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