cvs commit: src/sys/net if_disc.c

Bruce M. Simpson bms at
Fri Nov 2 14:13:28 PDT 2007

Yar Tikhiy wrote:
> yar         2007-10-27 19:57:41 UTC
>   FreeBSD src repository
>   Modified files:
>     sys/net              if_disc.c 
>   Log:
>   Add a comment explaining why disc(4) bears the IFF_LOOPBACK flag.
>   It should be the final follow-up to an old yet unfinished discussion
>   on whether IFF_LOOPBACK is necessary for disc(4) and why.

Thanks for doing this.

It is also worth noting that blackhole routes in the forwarding table 
rely upon there being a lo(4) interface in the system unless fast 
forwarding is enabled. This is a 'gotcha' which people may not be aware 
of, though I think I may have commented it somewhere...


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