On Tue, Oct 10, 2017 at 03:28:39PM +0000, Anthony Coulter wrote:
> I upgraded OpenBSD 6.1 to 6.2 on a Vultr node and after the first
> reboot dhclient reports this new error:
>
> /var/db/dhclient.leases.vio0 line 15: Expecting CIDR prefix length.
> option classless-static-routes 0.0.0.0/33
33 is an invalid number here. The number of bits must be between 0 and
32.
The correct specification for a default route is
0.0.0.0/0 <route ip>
.... Ken
> ^
>
> At this moment I both OpenBSD 6.1 and 6.2 are running on different
> instances of Vultr nodes. Copying different versions of /sbin/dhclient
> back and forth between my boxes shows that they're putting different
> classless-static-routes lines in the leases file:
>
> option classless-static-routes 0.0.0.0/0 108.61.190.1, 169.254.169.254/32
> 108.61.190.1;
> option classless-static-routes 0.0.0.0/33 108.61.190.1, 169.254.169.254/32
> 108.61.190.1;
>
> (The top line is created by a 6.1 dhclient executable; the bottom line
> is created by 6.2.)
>
> Here's a tcpdump trace showing what happens when I renew my lease on
> the server in question. Since "classless-static-routes" is option 121,
> I was expecting to see a "79" (hex) somewhere in the response, but I
> don't. So I have no idea where dhclient is getting the invalid mask
> length from.
>
> # doas tcpdump -nXi vio0 port 67 and port 68
> tcpdump: listening on vio0, link-type EN10MB
> 11:22:13.801668 108.61.190.203.68 > 255.255.255.255.67: xid:0xc9048474
> [|bootp] [tos 0x10]
> 0000: 4510 0148 0000 0000 8011 0e8d 6c3d becb E..H........l=..
> 0010: ffff ffff 0044 0043 0134 57f1 0101 0600 .....D.C.4W.....
> 0020: c904 8474 0000 0000 0000 0000 0000 0000 ...t............
> 0030: 0000 0000 0000 0000 5600 0035 275c 0000 ........V..5'\..
> 0040: 0000 0000 0000 0000 0000 0000 0000 0000 ................
> 0050: 0000 0000 0000 0000 0000 0000 0000 0000 ................
> 0060: 0000 0000 0000 ......
>
> 11:22:13.803582 169.254.169.254.67 > 108.61.190.203.68: xid:0xc9048474
> Y:108.61.190.203 [|bootp] [tos 0xc0]
> 0000: 45c0 0157 30df 0000 4011 c8f1 a9fe a9fe E..W0...@.......
> 0010: 6c3d becb 0043 0044 0143 f7de 0201 0600 l=...C.D.C......
> 0020: c904 8474 0000 0000 0000 0000 6c3d becb ...t........l=..
> 0030: 0000 0000 0000 0000 5600 0035 275c 0000 ........V..5'\..
> 0040: 0000 0000 0000 0000 0000 0000 0000 0000 ................
> 0050: 0000 0000 0000 0000 0000 0000 0000 0000 ................
> 0060: 0000 0000 0000 ......
>
> ^C
> 170 packets received by filter
> 0 packets dropped by kernel
>
> Regards,
> Anthony Coulter
>
