-extern bool setup_device(void);
-extern void close_device(void);
-extern bool read_packet(struct vpn_packet_t *);
-extern bool write_packet(struct vpn_packet_t *);
-extern void dump_device_stats(void);
-
-#endif /* __TINC_DEVICE_H__ */
+typedef struct devops_t {
+ bool (*setup)(void);
+ void (*close)(void);
+ bool (*read)(struct vpn_packet_t *);
+ bool (*write)(struct vpn_packet_t *);
+} 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;
+
+#endif /* __TINC_DEVICE_H__ */