Hey,
i tried using arpspoof within the official Kali Linux RPi3 / and Raspbian Image. This command
sudo arpspoof -i eth0 -t targetip gatewayip
works fine on both but if i use wlan0
sudo arpspoof -i wlan0 -t targetip gatewayip
if get this error(on Kali AND Raspbian):
libnet_write_link(): only -1 bytes written (Invalid argument)
i have no idea why...seems that only a few people have this problem and they havent found a way to fix it.
hope you can help me.