Can a wi-fi adapter not support NAT?

Question

linux

You need to forward the Internet to another computer by setting up nat and dhcp.
There is a PC with a built-in network card and wi-fi dlink g132.
In hotspot mode g132 can not work.
And I decided to take the Internet on wlan0 and give it to the network through eth0.
There were no difficulties with dhcp, but after trying different nat settings, the Internet did not work.
Could it be the adapter? He himself is a worker.

Answer 1

the wi-fi adapter has no idea what NAT is, it will transmit what the adapter driver gave it. (OSI layer 1)
The Wi-Fi adapter driver has no idea what NAT is, it will transmit what the upstream module gave it to it (OSI layer 2)
Here is the module in the kernel that provides OSI 3, including iptables, knows what is NAT but has no idea who will transmit what it will form :)