Filter out neighborinfo if we don't have the module enabled

src/mesh/Router.cpp

@@ -469,8 +469,15 @@ void Router::perhapsHandleReceived(meshtastic_MeshPacket *p)
     // assert(radioConfig.has_preferences);
     bool ignore = is_in_repeated(config.lora.ignore_incoming, p->from) || (config.lora.ignore_mqtt && p->via_mqtt);
 
+    // Neighbor info module is disabled, ignore expensive neighbor info packets
+    if (p->which_payload_variant == meshtastic_MeshPacket_decoded_tag &&
+        p->decoded.portnum == meshtastic_PortNum_NEIGHBORINFO_APP &&
+        (!moduleConfig.has_neighbor_info || !moduleConfig.neighbor_info.enabled))
+        ignore = true;
+
     if (ignore) {
-        LOG_DEBUG("Ignoring incoming message, 0x%x is in our ignore list or came via MQTT\n", p->from);
+        LOG_DEBUG("Ignoring incoming message, 0x%x is in our ignore list, came via MQTT, or is on a portnum we haven't enabled\n",
+                  p->from);
     } else if (ignore |= shouldFilterReceived(p)) {
         LOG_DEBUG("Incoming message was filtered 0x%x\n", p->from);
     }