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/*-
* Copyright (c) 2013 Arthur Mesh <arthurmesh@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef SYS_DEV_RANDOM_RANDOM_ADAPTORS_H_INCLUDED
#define SYS_DEV_RANDOM_RANDOM_ADAPTORS_H_INCLUDED
MALLOC_DECLARE(M_ENTROPY);
typedef void random_adaptor_init_func_t(void);
typedef void random_adaptor_deinit_func_t(void);
typedef void random_adaptor_read_func_t(uint8_t *, u_int);
typedef void random_adaptor_write_func_t(uint8_t *, u_int);
typedef int random_adaptor_seeded_func_t(void);
typedef void random_adaptor_reseed_func_t(void);
struct random_adaptor {
const char *ra_ident;
int ra_priority;
random_adaptor_init_func_t *ra_init;
random_adaptor_deinit_func_t *ra_deinit;
random_adaptor_read_func_t *ra_read;
random_adaptor_write_func_t *ra_write;
random_adaptor_reseed_func_t *ra_reseed;
random_adaptor_seeded_func_t *ra_seeded;
};
struct random_adaptors {
LIST_ENTRY(random_adaptors) rra_entries; /* list of providers */
const char *rra_name; /* name of random adaptor */
struct random_adaptor *rra_ra;
};
/* Dummy "always-block" pseudo-device */
extern struct random_adaptor randomdev_dummy;
void random_adaptors_init(void);
void random_adaptors_deinit(void);
void random_adaptor_register(const char *, struct random_adaptor *);
void random_adaptor_deregister(const char *);
int random_adaptor_read(struct cdev *, struct uio *, int);
int random_adaptor_write(struct cdev *, struct uio *, int);
int random_adaptor_poll(struct cdev *, int, struct thread *);
int random_adaptor_read_rate(void);
void random_adaptor_unblock(void);
#endif /* SYS_DEV_RANDOM_RANDOM_ADAPTORS_H_INCLUDED */
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