Thomas Graf wrote:
* Patrick McHardy <[email protected]> 2007-12-18 00:51
Chris Friesen wrote:
Patrick McHardy wrote:
From a kernel perspective there are only complete dumps, the
filtering is done by iproute. So the fact that it shows them
when querying specifically implies there is a bug in the
iproute neighbour filter. Does it work if you omit "all"
>from the ip neigh show command?
Omitting "all" gives identical results. It is still missing entries
when compared with the output of "arp".
In that case the easiest way to debug this is probably if you
add some debugging to ip/ipneigh.c:print_neigh() since I'm
unable to reproduce this problem. A printf for all the filter
conditions (=> return 0) at the top should do.
Alternatively, you can download libnl and run
NLCB=debug src/nl-neigh-dump brief
and check if the netlink message is sent by the kenrel for the
neighbour in question.
It should be, according to Chris, "ip neigh show <ip>" does
show the missing entries, and in case of neighbour entries
all filtering is done in userspace.
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