extern void handle_new_meta_connection(struct event_loop_t *loop, void *, int);
extern int setup_listen_socket(const sockaddr_t *);
extern int setup_vpn_in_socket(struct meshlink_handle *mesh, const sockaddr_t *);
-extern bool send_sptps_data(void *handle, uint8_t type, const char *data, size_t len);
-extern bool receive_sptps_record(void *handle, uint8_t type, const char *data, uint16_t len);
+extern bool send_sptps_data(void *handle, uint8_t type, const void *data, size_t len);
+extern bool receive_sptps_record(void *handle, uint8_t type, const void *data, uint16_t len);
extern void send_packet(struct meshlink_handle *mesh, struct node_t *, struct vpn_packet_t *);
extern void receive_tcppacket(struct meshlink_handle *mesh, struct connection_t *, const char *, int);
extern void broadcast_packet(struct meshlink_handle *mesh, const struct node_t *, struct vpn_packet_t *);