Re: Accessing ifnet
Re: Accessing ifnet
- Subject: Re: Accessing ifnet
- From: Rick Macklem <email@hidden>
- Date: Fri, 6 Jun 2008 11:02:55 -0400 (EDT)
On Fri, 6 Jun 2008, Michael T??xen wrote:
Dear all,
in an NKE I'm using code like
TAILQ_FOREACH(ifn, &ifnet, if_list) {
/* Do something with ifn */
}
and need to protect it by
ifnet_head_lock_shared();
TAILQ_FOREACH(ifn, &ifnet, if_list) {
/* Do something with ifn */
}
ifnet_head_done();
but the kextload reports
kld(): Undefined symbols:
_ifnet_head_done
_ifnet_head_lock_shared
As OSBundleLibraries I use com.apple.kernel.
I do know that I'm using unsupported API... but is there a way
to use the mutex routines?
To the best of my knowledge, you can't link to those routines, because
they aren't in the mach_kernel's symbol table. However, so long as you
abide by the terms of the APSL, you can crib them from the sources and
put them in your Kext. (I'm assuming you already understand the risks
associated with doing this, such as "Apple could change them for any
release and you code will then be broken".)
If you download xnu-1228 sources, look in bsd/net/dlil.c for them.
rick
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