-extern void handle_incoming_vpn_data(void);
-extern void finish_connecting(connection_t *);
-extern void do_outgoing_connection(connection_t *);
-extern int handle_new_meta_connection(void);
-extern int setup_listen_socket(sockaddr_t *);
-extern int setup_vpn_in_socket(sockaddr_t *);
-extern void send_packet(struct node_t *, vpn_packet_t *);
-extern void receive_packet(struct node_t *, vpn_packet_t *);
+extern void handle_incoming_vpn_data(int, short, void *);
+extern void finish_connecting(struct connection_t *);
+extern void do_outgoing_connection(struct connection_t *);
+extern void handle_new_meta_connection(int, short, void *);
+extern int setup_listen_socket(const sockaddr_t *);
+extern int setup_vpn_in_socket(const sockaddr_t *);
+extern void send_packet(const struct node_t *, vpn_packet_t *);