create network cloned devices without specifying a unit

[Darren Reed]

A diff has been attached to the following PR:

kern/46633: create network cloned devices without specifying a unit

It should eventually show up here:
http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=46633
(but is not there currently)

Testing:

firewall# ./ifconfig tun create
tun0
firewall# ./ifconfig tun create
tun1
firewall# ./ifconfig gif create
gif0
firewall# ifconfig tun1
tun1: flags=10<POINTOPOINT> mtu 1500
firewall# ifconfig gif0
gif0: flags=8010<POINTOPOINT,MULTICAST>
firewall# ifconfig gif0 destroy
firewall# ifconfig tun1 destroy
firewall# ifconfig tun0 destroy
firewall# ifconfig tun0
ifconfig: SIOCGIFFLAGS tun0: Device not configured

Comments?
Criticisims?
Code review?

Darren


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[Matthew Mondor]

On Wed, 27 Jun 2012 22:00:44 +1000

Post by Darren Reed
firewall# ./ifconfig tun create
tun0

I think it's a good thing to have, making the C and ifconfig cloning
interfaces more consistent. I actually didn't know that this was not
already possible using ifconfig(8).

[Manuel Bouyer]

Post by Darren Reed
kern/46633: create network cloned devices without specifying a unit
http://gnats.netbsd.org/cgi-bin/query-pr-single.pl?number=46633
(but is not there currently)
firewall# ./ifconfig tun create
tun0
firewall# ./ifconfig tun create
tun1
firewall# ./ifconfig gif create
gif0
firewall# ifconfig tun1
tun1: flags=10<POINTOPOINT> mtu 1500
firewall# ifconfig gif0
gif0: flags=8010<POINTOPOINT,MULTICAST>
firewall# ifconfig gif0 destroy
firewall# ifconfig tun1 destroy
firewall# ifconfig tun0 destroy
firewall# ifconfig tun0
ifconfig: SIOCGIFFLAGS tun0: Device not configured
Comments?
Criticisims?
Code review?

Code looks good. I can't see a use case for this myself, and as long as I can
still 'ifconfig vlan1234 create' I'm happy :)
I guess this will be usefull for higher level network management tools.