Bruce M Simpson cd83bbd2aa Implement ifnet cloning for tun(4)/tap(4).
Make devfs cloning a sysctl/tunable which defaults to on.

If devfs cloning is enabled, only the super-user may create
tun(4)/tap(4)/vmnet(4) instances. Devfs cloning is still enabled by
default; it may be disabled from the loader or via sysctl with
"net.link.tap.devfs_cloning" and "net.link.tun.devfs_cloning".

Disabling its use affects potentially all tun(4)/tap(4) consumers
including OpenSSH, OpenVPN and VMware.

PR:		105228 (potentially also 90413, 105570)
Submitted by:	Landon Fuller
Tested by:	Andrej Tobola
Approved by:	core (rwatson)
MFC after:	4 weeks
2007-02-04 16:32:46 +00:00
..
2006-09-04 19:24:34 +00:00