Subject: Re: standards/5645: No answer from 0.0.0.0
To: None <netbsd-bugs@NetBSD.ORG>
From: Wolfgang Rupprecht <firstname.lastname@example.org>
Date: 06/24/1998 09:13:28
> Any request to 0.0.0.0 gets no response.
The fact that BSD ever routed unitcast packets to a location that was
not indicated in the routing table was a bug. It is my belief that
the routing table should be WYSIWYG.
If this weird routing is desired, one should be able to do the
following in /etc/netstart (*):
ifconfig lo0 alias 0.0.0.0
route add -inet -host 0.0.0.0 -iface lo0
Please lets not wire routing policy into the code.
(*) Note: I say should. The current code has limitations/bugs that
prevents this from working.
# route add -inet -host 0.0.0.0 -iface 127.0.0.1
writing to routing socket: File exists
add host 0.0.0.0: gateway 127.0.0.1: File exists
bug 1) the radix routing table appears to get confused and think
0.0.0.0/0 and 0.0.0.0/32 are one and the same CIDR entity.
2) interfaces can't be named by name in 'route add -iface ifname".
one has to look up the interface's primary address with ifconfig
and then use that as the arg to "route add"
3) ifconfig -a doesn't show alias addresses
Wolfgang Rupprecht <email@example.com>