Definition of Arp result flags?

Can anyone provide some information about the HW Type, and what the Flags mean, for the Arp command shown below?

root@OpenWrt:~# arp -x
IP address       HW type     Flags       HW address            Mask     Device
192.168.1.67     0x1         0x0         00:00:00:00:00:00     *        eth0.2
192.168.1.115    0x1         0x0         00:00:00:00:00:00     *        eth0.2
192.168.1.1      0x1         0x2         00:1f:90:XX:XX:XX     *        eth0.2
192.168.10.199   0x1         0x2         78:31:c1:XX:XX:XX     *        br-lan

I looked at Man on a Linux box (no Man on OpenWRT), but I can't seem to find it.

I gather 0x0 means "Incomplete", but wondering what the other flags could be and mean.

The flags indicate if the mac address has been learned, manually set, published (announced by another node than the requested) or is incomplete.

I think you can must check your kernel source to figure out what the flags mean or you simply try it. My system translates

0x0 incomplete
0x2 complete
0x6 complete and manually set

Learned by comparing the output of arp with /proc/net/arp.

The definition of the flags is given in include/uapi/linux/if_arp.h.

Definition of Arp result flags?

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