5 * Copyright (c) 2002 Jason L. Wright (jason@thought.net)
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Jason L. Wright
19 * 4. The name of the author may not be used to endorse or promote products
20 * derived from this software without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
24 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
30 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
31 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
36 /* Some of the tests depend on these values */
37 #define RNDTEST_NBYTES 2500
38 #define RNDTEST_NBITS (8 * RNDTEST_NBYTES)
40 struct rndtest_state {
41 device_t rs_parent; /* associated device */
42 u_int8_t *rs_end, *rs_begin, *rs_current;
44 int rs_collect; /* collect and test data */
45 int rs_discard; /* discard/accept random data */
46 u_int8_t rs_buf[RNDTEST_NBYTES];
49 struct rndtest_stats {
50 u_int32_t rst_discard; /* number of bytes discarded */
51 u_int32_t rst_tests; /* number of test runs */
52 u_int32_t rst_monobit; /* monobit test failures */
53 u_int32_t rst_runs; /* 0/1 runs failures */
54 u_int32_t rst_longruns; /* longruns failures */
55 u_int32_t rst_chi; /* chi^2 failures */
58 extern struct rndtest_state *rndtest_attach(device_t dev);
59 extern void rndtest_detach(struct rndtest_state *);
60 extern void rndtest_harvest(struct rndtest_state *arg, void * buf, u_int len);