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Eddy Petrișor wrote:

> It seems there is something wrong with
> /usr/lib/laptop-net/arp-discovery:
> 
> bounty:/home/eddy/usr/src/laptop-net/laptop-net-2.26#
> /usr/lib/laptop-net/arp-discovery eth0 /etc/laptop-net/ip-map ; echo
> "ERROR = $?"
> @NO-RESPONSES@
> ERROR = 0

This looks like a deterministic problem :-/ (well, probably is a
initialization issue)...

I have tried to see what happens (and complied the package with
- -DDEBUGGING_OUTPUT), which packages are generated and fired up
tshark on a console while running by hand arp-discovery, and behold,
the answer came right away:

bounty:/home/eddy/usr/src/laptop-net/laptop-net-2.26/src#
./arp-discovery eth0 /etc/laptop-net/ip-map
00 15 c5 bb a3 23
addr=3239607126
target->s_addr = 3239607126      source->s_addr =        0
addr=4266502336
target->s_addr = 4266502336      source->s_addr =        0
addr=4261521600
target->s_addr = 4261521600      source->s_addr =        0
addr=16779786
target->s_addr = 16779786        source->s_addr =        0
addr=1275988490
target->s_addr = 1275988490      source->s_addr =        0
addr=537790986
target->s_addr = 537790986       source->s_addr =        0
addr=370084362
target->s_addr = 370084362       source->s_addr =        0

ff ff ff ff ff ff 00 15 c5 bb a3 23 08 06 00 01
08 00 06 04 00 01 00 15 c5 bb a3 23 00 00 00 00
00 00 00 00 00 00 56 7b 18 c1

ff ff ff ff ff ff 00 15 c5 bb a3 23 08 06 00 01
08 00 06 04 00 01 00 15 c5 bb a3 23 00 00 00 00
00 00 00 00 00 00 c0 a8 4d fe

00 15 c5 bb a3 23 00 0f 66 7f ab a0 08 06 00 01
08 00 06 04 00 02 00 0f 66 7f ab a0 c0 a8 4d fe
00 0f 66 7f ab a0 c0 a8 4d fe
00:0f:66:7f:ab:a0 c0 a8 4d fe
ritter

If tshark is not started, the response doesn't come, so this looks
like either a deterministic problem (want to measure, phenomena
disappears ;-) or an initialization issue and tshark does the
initialization job for arp-discovery.

[...]
ff ff ff ff ff ff 00 15 c5 bb a3 23 08 06 00 01
08 00 06 04 00 01 00 15 c5 bb a3 23 00 00 00 00
00 00 00 00 00 00 0a 0a 0e 20

ff ff ff ff ff ff 00 15 c5 bb a3 23 08 06 00 01
08 00 06 04 00 01 00 15 c5 bb a3 23 00 00 00 00
00 00 00 00 00 00 0a 0a 0f 16

ff ff ff ff ff ff 00 0f 66 7f ab a0 08 06 00 01
08 00 06 04 00 01 00 0f 66 7f ab a0 c0 a8 4d fe
00 00 00 00 00 00 c0 a8 4d 6f

00 0f 66 7f ab a0 00 15 c5 bb a3 23 08 06 00 01
08 00 06 04 00 02 00 15 c5 bb a3 23 c0 a8 4d 6f
00 0f 66 7f ab a0 c0 a8 4d fe
00:15:c5:bb:a3:23 c0 a8 4d 6f
@NO-RESPONSES@


I am not sure if this has anything to do with the pcap library which
arp-discovery uses (0.7) as opposed to tshark's 0.8 (0.9.5).

I will try to look deeper into this.

- --
Regards,
EddyP
=============================================
"Imagination is more important than knowledge" A.Einstein
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