[syslinux] nilo -> tftp-hpa interaction

[Giulio Orsero]

On Mon, 4 Feb 2002 17:21:48 +0100, Josef Siemes <jsiemes at web.de> wrote:

>Giulio Orsero <giulioo at pobox.com> schrieb am 04.02.02:
>> Floppy starts, detects nic, receives ip from dhcp server, requests boot
>> image to tftpd-hpa, then crashes when talking to tftp. Is  "Unknown TFTP
>> packet type 0x53ff" a kind of packet I can block using tftp-hpa -r option,
>> or it it nilo that is broken and there's nothing to do?
>
>hmm, could you try to make some tcpdump of this? Maybe this sheds
>some light on it.

# tcpdump  -n -x ether host <nilo ether addr>
tcpdump: listening on eth0
18:02:06.193560 0.0.0.0.0 > 0.0.0.0.67: bootp-#3 [|bootp]
                         4500 0240 0000 0000 3c11 7cae 0000 0000
                         0000 0000 0000 0043 022c 0000 0301 0600
                         0000 0000 0000 0000 0000 0000 0000 0000
                         0000 0000 0000
18:02:06.194998 192.168.1.7.67 > 192.168.1.115.68: Y:192.168.1.115
S:192.168.1.7 [|bootp] [tos 0x10]
                         4510 0148 0000 0000 1011 25cb c0a8 0107
                         c0a8 0173 0043 0044 0134 b25d 0201 0600
                         0000 0000 0000 0000 0000 0000 c0a8 0173
                         c0a8 0107 0000
18:02:06.214421 0.0.0.0.0 > 0.0.0.0.67: bootp-#3 Y:192.168.1.115
S:192.168.1.7 [|bootp]
                         4500 0240 0000 0000 3c11 7cae 0000 0000
                         0000 0000 0000 0043 022c 0000 0301 0600
                         0000 0000 0000 0000 0000 0000 c0a8 0173
                         c0a8 0107 0000
18:02:06.215871 192.168.1.7.67 > 192.168.1.115.68: Y:192.168.1.115
S:192.168.1.7 [|bootp] [tos 0x10]
                         4510 0148 0000 0000 1011 25cb c0a8 0107
                         c0a8 0173 0043 0044 0134 2928 0201 0600
                         0000 0000 0000 0000 0000 0000 c0a8 0173
                         c0a8 0107 0000
18:02:06.223671 arp who-has 192.168.1.7 tell 192.168.1.115
                         0001 0800 0604 0001 0050 5640 6b23 c0a8
                         0173 0000 0000 0000 c0a8 0107 92a8 111a
                         5010 4470 4ee4 0000 0000 0080 ff53
18:02:06.223701 arp reply 192.168.1.7 is-at 0:50:4:32:12:b0
                         0001 0800 0604 0002 0050 0432 12b0 c0a8
                         0107 0050 5640 6b23 c0a8 0173
18:02:06.370927 192.168.1.115.2001 > 192.168.1.7.69: 20 RRQ "niloboot"
                         4500 0030 0000 0000 3c11 faf2 c0a8 0173
                         c0a8 0107 07d1 0045 001c 0000 0001 6e69
                         6c6f 626f 6f74 006e 6574 6173 6369 6900
18:02:06.374918 192.168.1.7.3012 > 192.168.1.115.2001: udp 516
                         4500 0220 0fb8 0000 4011 e54a c0a8 0107
                         c0a8 0173 0bc4 07d1 020c f5af 0003 0001
                         3613 031b 5400 0000 0000 2092 0000 8092
                         6d6b 6e62 692d
<nilo died here>
18:02:11.368808 arp who-has 192.168.1.115 tell 192.168.1.7
                         0001 0800 0604 0001 0050 0432 12b0 c0a8
                         0107 0000 0000 0000 c0a8 0173
18:02:11.368947 192.168.1.7.3012 > 192.168.1.115.2001: udp 516
                         4500 0220 0fbf 0000 4011 e543 c0a8 0107
                         c0a8 0173 0bc4 07d1 020c f5af 0003 0001
                         3613 031b 5400 0000 0000 2092 0000 8092
                         6d6b 6e62 692d
18:02:12.368865 arp who-has 192.168.1.115 tell 192.168.1.7
                         0001 0800 0604 0001 0050 0432 12b0 c0a8
                         0107 0000 0000 0000 c0a8 0173
18:02:13.368923 arp who-has 192.168.1.115 tell 192.168.1.7
                         0001 0800 0604 0001 0050 0432 12b0 c0a8
                         0107 0000 0000 0000 c0a8 0173
18:02:16.369212 192.168.1.7.3012 > 192.168.1.115.2001: udp 516
                         4500 0220 0fc9 0000 4011 e539 c0a8 0107
                         c0a8 0173 0bc4 07d1 020c f5af 0003 0001
                         3613 031b 5400 0000 0000 2092 0000 8092
                         6d6b 6e62 692d
ò
13 packets received by filter

Thanks

-- 
giulioo at pobox.com