Copy traffic from a monitor port to ip

Hi guys,

I have configured port mirroring on my gl.inet ar750s.
Lan port 1 is mirrored to the wan port. That works fine.
Now I want also be able to get this traffic through wifi connection.
I tried to "tee" the traffic from every possible interface with no success. I also can't see the traffic on the router itself with tcpdump on the wan interface (but on a pc connected to the wan interface) so I wonder if it's even possible to copy this traffic with iptables or is there some hw acceleration in the switch which makes it impossible?