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| author | Eric Dumazet <[email protected]> | 2015-07-27 11:33:50 +0200 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2015-07-28 23:41:24 -0700 |
| commit | 11c91ef98f37cd743098de26160fffd7f9bd40e1 (patch) | |
| tree | fbac25bfba3cd3487b659d37cf31d5d9d5c7070a /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 865b804244f228e80fb62abe464296399253cce8 (diff) | |
arp: filter NOARP neighbours for SIOCGARP
When arp is off on a device, and ioctl(SIOCGARP) is queried,
a buggy answer is given with MAC address of the device, instead
of the mac address of the destination/gateway.
We filter out NUD_NOARP neighbours for /proc/net/arp,
we must do the same for SIOCGARP ioctl.
Tested:
lpaa23:~# ./arp 10.246.7.190
MAC=00:01:e8:22:cb:1d // correct answer
lpaa23:~# ip link set dev eth0 arp off
lpaa23:~# cat /proc/net/arp # check arp table is now 'empty'
IP address HW type Flags HW address Mask Device
lpaa23:~# ./arp 10.246.7.190
MAC=00:1a:11:c3:0d:7f // buggy answer before patch (this is eth0 mac)
After patch :
lpaa23:~# ip link set dev eth0 arp off
lpaa23:~# ./arp 10.246.7.190
ioctl(SIOCGARP) failed: No such device or address
Signed-off-by: Eric Dumazet <[email protected]>
Reported-by: Vytautas Valancius <[email protected]>
Cc: Willem de Bruijn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions