added automatic latest firmware spoofing (#16)

Reviewed-on: #16

README.md

@@ -8,6 +8,7 @@ Daemon that makes an OpenWrt router appear as a UniFi AP to UniFi Network contro
 | --- | --- | --- |
 | **L2 Discovery** | UDP broadcast + multicast every 10s | `announce.c` → port 10001 |
 | **Adoption** | AES-128-CBC handshake with the controller | `inform.c` → `handle_response()` |
+| **Firmware spoofing** | Persists and reports the target version requested by an upgrade | `inform.c` → `handle_response()` |
 | **WiFi Config** | Creates WiFi networks from the controller via UCI | `wlan.c` → `wlan_apply_config()` |
 | **Band Steering** | 802.11k/v Neighbor Reports + BSS Transition | `wlan.c` → `apply_vap()` |
 | **Fast Roaming** | 802.11r FT with mobility_domain derived from MAC | `wlan.c` → `apply_vap()` |
@@ -99,6 +100,10 @@ Daemon settings live in `/etc/openuf/openuf.conf`. Adoption and controller state
 are persisted separately in `/etc/openuf/state.json`; do not copy that file
 between devices because it contains the device authentication key.
 
+Because UniFi firmware cannot run on the OpenWrt host, an upgrade request does
+not download or install its image. Instead, openUF saves the requested firmware
+version in `state.json` and reports it in subsequent inform packets.
+
 ---
 
 ## Glossary