This component will be the Binder RPC proxy between the TEE and external clients including the host VM and (one day) other VMs. The proxy exposes the Binder RPC protocol IMicrofuchsia over virtio-socket on the port specified in the binder definition (currently 5680). The host is expected to provide an instance of IHostProxy over this interface to let the TEE send requests to the host.
For each TA found in the configuration exposed to the binder-proxy the proxy instantiates a Binder RPC server. The proxy allocates listening ports to TA servers in iteration order starting one above the control port. The root object of each server is an instance of ITrustedApp. The RPC server connects to the FIDL protocol exposed by the TA lazily when a binder call is received.