small patch for ngctl

[Ganbold]

Brian Candler wrote:
> On Fri, May 19, 2006 at 05:25:16PM +0900, Ganbold wrote:
>   
>> Rec'd data packet on hook "qqqq":
>> 0000:  ff ff ff ff ff ff 00 14 6c 2e 23 71 08 00 45 00  ........l.#q..E.
>> 0010:  00 4e 17 4e 00 00 80 11 a0 c6 c0 a8 00 3b c0 a8  .N.N.........;..
>> 0020:  00 ff 00 89 00 89 00 3a b1 dc 80 8f 01 10 00 01  .......:........
>> 0030:  00 00 00 00 00 00 20 45 4f 45 42 46 44 45 42 45  ...... EOEBFDEBE
>> 0040:  42 43 41 43 41 43 41 43 41 43 41 43 41 43 41 43  BCACACACACACACAC
>> ...
>>
>> Is it what it supposed to handle?
>>     
>
> Looks like a valid ethernet frame to me;
>
> ff:ff:ff:ff:ff:ff  - destination MAC addr (broadcast)
> 00:14:6c:2e:23:71  - source MAC addr
> 0800               - protocol (IP)
>   45 00            - IPv4
>   00 4e            - datagram length
>   17 4e 00 00      - ID, flags, frag offset
>   80               - TTL
>   11               - protocol (UDP)
>   a0 c6            - header checksum
>   c0 a8 00 3b      - source IP: 192.168.0.59
>   c0 a8 00 ff      - destination IP: 192.168.0.255
>   00 89            - source port 137
>   00 89            - destination port 137
>   00 3a            - length
>   b1 dc            - UDP checksum
>   ...              - ... data
>
> So I'd say this is some Windows machine broadcasting NetBIOS crap around
> your network :-)
>   
Yeah, I'm all alone with FreeBSD, everybody in office uses Windows 
except me :(

Ganbold
> Regards,
>
> Brian.
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