Date: Wed, 8 Jan 2014 17:18:23 -0800 From: John-Mark Gurney <jmg@funkthat.com> To: current@FreeBSD.org Subject: interesting routing bug... Message-ID: <20140109011823.GI99167@funkthat.com>
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Well, I was trying to manually add a route for a host on the local
network (I can explain why, but it doesn't matter) and I got this:
# netstat -rnfinet
Routing tables
Internet:
Destination Gateway Flags Netif Expire
default 192.168.0.14 UGS re0
127.0.0.1 link#3 UH lo0
192.168.0.0/24 link#1 U re0
192.168.0.21 link#1 UHS lo0
# route add -host 192.168.0.254 -interface re0 -link 04:4a:31:d3:95:dc
add net 192.168.0.254: gateway re0
# netstat -rnfinet
Routing tables
Internet:
Destination Gateway Flags Netif Expire
0.0.0.0&0x20500 90:2b:34:ab:bb:85 US re0
default 192.168.0.14 UGS re0
10.0.0.0/8 link#2 U msk0
10.42.42.21 link#2 UHS lo0
127.0.0.1 link#3 UH lo0
192.168.0.0/24 link#1 U re0
192.168.0.21 link#1 UHS lo0
# route delete 0.0.0.0
delete net 0.0.0.0
# route flush
:: localhost -fib 0 done
::ffff:0.0.0.0 localhost -fib 0 done
fe80:: localhost -fib 0 done
ff02:: localhost -fib 0 done
# netstat -rnfinet
Routing tables
Internet:
Destination Gateway Flags Netif Expire
0.0.0.0&0x20500 90:2b:34:ab:bb:85 US re0
127.0.0.1 link#3 UH lo0
192.168.0.0/24 link#1 U re0
192.168.0.21 link#1 UHS lo0
So, as you can see, I have managed to add a bogus route w/o a way
to remove it short of rebooting the box... And because of this route,
some hosts like svn0.us-west.freebsd.org will match causing the machine
to try to find the ip on the local network.
This route I assume should be rejected by the kernel and not added,
or there is a mismatch between the route program and how the kernel
understands it.
I can provide more information upon request.
Thanks.
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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