I have a wired computing device that I would like to attach to my wireless network. I also have a WiFi repeater device that has an RJ-45 Ethernet jack and a pair of wireless antennae. Normally, the repeater is designed to connect to the existing LAN through its wire and transmit to wireless devices through its antennae in access point mode. I would like to use OpenWRT to reverse this order. I want my repeater device to use OpenWRT to connect to the existing LAN through its wireless interfaces and relay this communication through its wired interface to my wired-only computing device.
So far, the closest configuration I have achieved has been to set my repeater as a wireless bridge client with a separate network address scheme as well as its own DHCP server. This works well for allowing the wired computing device behind the repeater to communicate out to the internet. Unfortunately, my original network cannot easily discover the computing device and its services because they are separated into a different sub-network.
Is there a way to wirelessly bridge the two LAN topologies so the bridge client does not need its own network address scheme or DHCP? If Wireless Bridge Mode cannot do this, could we instead develop a WiFi Adapter Mode? This would turn a device running OpenWRT into a simple translator to enable a single wired computing device to connect to a wireless network as a DHCP client.