K 10
svn:author
V 4
loos
K 8
svn:date
V 27
2015-07-31T20:02:12.970155Z
K 7
svn:log
V 577
Do not allocate the buffers at opening of the descriptor, because once
the buffer is allocated we are committed to a particular buffer method
(BPF_BUFMODE_BUFFER in this case).

If we are using zero-copy buffers, the userland program must register its
buffers before set the interface.

If we are using kernel memory buffers, we can allocate the buffer at the
time that the interface is being set.

This fix allows the usage of BIOCSETBUFMODE after r235746.

Update the comments to reflect the recent changes.

MFC after:	2 weeks
Sponsored by:	Rubicon Communications (Netgate)

END