Link state changes

[Andrew Thompson]

> Revision 205024 - (annotate)
> Thu Mar 11 17:56:46 2010 UTC (2 months, 3 weeks ago) by qingli
>
> The if_tap interface is of IFT_ETHERNET type, but it
> does not set or update the if_link_state variable.
> As such RT_LINK_IS_UP() fails for the if_tap interface.
>
> Also, the RT_LINK_IS_UP() needs to bypass all loopback
> interfaces because loopback interfaces are considered
> up logically as long as the system is running.
>
> This patch fixes the above issues by setting and updating
> the if_link_state variable when the tap interface is
> opened or closed respectively. Similary approach is
> already done in the if_tun device.

This is also a problem for bridge(4) and possibly ef(4), edesc(4) and
epair(4). Should the same change be applied to them?


Andrew