Change bpf(4) to use the cdevpriv API.

Right now the bpf(4) driver uses the cloning API to generate /dev/bpf%u.
When an application such as tcpdump needs a BPF, it opens /dev/bpf0,
/dev/bpf1, etc. until it opens the first available device node. We used
this approach, because our devfs implementation didn't allow
per-descriptor data.

Now that we can, make it use devfs_get_cdevpriv() to obtain the private
data. To remain compatible with the existing implementation, add a
symlink from /dev/bpf0 to /dev/bpf. I've already changed libpcap to
compile with HAVE_CLONING_BPF, which makes it use /dev/bpf. There may be
other applications in the base system (dhclient) that use the loop to
obtain a valid bpf.

Discussed on:	src-committers
Approved by:	csjp

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/libpcap/config.h b/lib/libpcap/config.h
index a96d891808381..78bb0db1fc624 100644
--- a/lib/libpcap/config.h
+++ b/lib/libpcap/config.h
@@ -15,7 +15,7 @@
 /* #undef BDEBUG */
 
 /* define if you have a cloning BPF device */
-/* #undef HAVE_CLONING_BPF */
+#define HAVE_CLONING_BPF 1
 
 /* define if you have the DAG API */
 /* #undef HAVE_DAG_API */