[libdnet-devel] interface-bound ARP lookups?

[Heiko W. <he...@or...>]

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Hello List,

i was trying to read my ARP-cache with arp_get() and stumbled upon a
weird error: It's only possible to get the ethernet address from a
corresponding ip, if it its linked to my first interface, eth0. First,
i thought my code is buggy, but then i tested the same function with
the test programm and got the same result. Here's the output:

$ sudo dumbnet arp get 192.168.100.154
192.168.100.154 at 00:40:8c:68:20:3f

$ sudo dumbnet arp get 192.168.200.40
dumbnet: arp_get: No such process

$ arp
Address                  HWtype  HWaddress           Flags
Mask            Iface
192.168.100.154          ether   00:40:8c:68:20:3f  
C                     eth0
192.168.200.40           ether   00:0a:27:de:b9:8a  
C                     eth3

Did i miss something?

I work on a Ubuntu 9.04 System with Linux Kernel 2.6.28-11-generic and
libdumbnet1 1.8-1.5 (?)(the source says 1.1.1.1). I should attach,
that on current Ubuntu-systems libdnet ist called 'libdumbnet', etc. i
hope somebody has an answer, because i see no real alternative for
reading the cache..

best regards,
Heiko Westermann
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