-#define interface iface
-#else
-extern char *interface;
-#endif
-
-extern int setup_device(void);
-extern void close_device(void);
-extern int read_packet(vpn_packet_t *);
-extern int write_packet(vpn_packet_t *);
-extern void dump_device_stats(void);
+
+extern uint64_t device_in_packets;
+extern uint64_t device_in_bytes;
+extern uint64_t device_out_packets;
+extern uint64_t device_out_bytes;
+
+typedef struct devops_t {
+ bool (*setup)(void);
+ void (*close)(void);
+ bool (*read)(struct vpn_packet_t *);
+ bool (*write)(struct vpn_packet_t *);
+ void (*dump_stats)(void);
+} devops_t;
+
+extern const devops_t os_devops;
+extern const devops_t dummy_devops;
+extern const devops_t raw_socket_devops;
+extern const devops_t multicast_devops;
+extern const devops_t uml_devops;
+extern const devops_t vde_devops;
+extern devops_t devops;