The userspace interface is divided in control operations and low-level data
exchange operation.
-CONTROL OPERATIONS:
+Control operations
+------------------
Generic netlink is used to implement the interface to the control operations.
The operations are composed by commands and events, all listed below:
All polling operations requested through one netlink socket are stopped when
it's closed.
-LOW-LEVEL DATA EXCHANGE:
+Low-level data exchange
+-----------------------
The userspace must use PF_NFC sockets to perform any data communication with
targets. All NFC sockets use AF_NFC::