/*      $NetBSD: t_rnd.c,v 1.13 2023/11/24 16:36:23 riastradh Exp $     */

/*
* Copyright (c) 2009 The NetBSD Foundation, Inc.
* 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.
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/

#include <sys/cdefs.h>
__RCSID("$NetBSD: t_rnd.c,v 1.13 2023/11/24 16:36:23 riastradh Exp $");

#include <sys/types.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/rndio.h>

#include <atf-c.h>
#include <unistd.h>

#include <rump/rump.h>
#include <rump/rump_syscalls.h>

#include "h_macros.h"

ATF_TC(RNDADDDATA);
ATF_TC_HEAD(RNDADDDATA, tc)
{
       atf_tc_set_md_var(tc, "descr",
           "Checks ioctl(RNDADDDATA) (PR kern/42020)");
}

/* Adapted from example provided by Juho Salminen in the noted PR. */
ATF_TC_BODY(RNDADDDATA, tc)
{
       rnddata_t rd;
       int fd;

       rump_init();
       fd = rump_sys_open("/dev/random", O_RDWR, 0);
       if (fd == -1)
               atf_tc_fail_errno("cannot open /dev/random");

       rd.entropy = 1;
       rd.len = 1;
       if (rump_sys_ioctl(fd, RNDADDDATA, &rd) == -1)
               atf_tc_fail_errno("RNDADDDATA");
}

ATF_TC(RNDADDDATA2);
ATF_TC_HEAD(RNDADDDATA2, tc)
{
       atf_tc_set_md_var(tc, "descr", "checks ioctl(RNDADDDATA) deals with "
           "garbage len field");
}
ATF_TC_BODY(RNDADDDATA2, tc)
{
       rnddata_t rd;
       int fd;

       rump_init();
       fd = rump_sys_open("/dev/random", O_RDWR, 0);
       if (fd == -1)
               atf_tc_fail_errno("cannot open /dev/random");

       rd.entropy = 1;
       rd.len = -1;
       ATF_REQUIRE_ERRNO(EINVAL, rump_sys_ioctl(fd, RNDADDDATA, &rd) == -1);
}

ATF_TC(read_random);
ATF_TC_HEAD(read_random, tc)
{
       atf_tc_set_md_var(tc, "descr", "does reading /dev/random return "
           "within reasonable time");
       atf_tc_set_md_var(tc, "timeout", "10");
}

ATF_TC_BODY(read_random, tc)
{
       char buf[128];
       int fd;
       unsigned i;

       rump_init();
       for (i = 0; i < 1000; i++) {
               alarm(2);
               RL(fd = rump_sys_open("/dev/random", RUMP_O_RDONLY));
               RL(rump_sys_read(fd, buf, sizeof(buf)));
               RL(rump_sys_close(fd));
       }
}

ATF_TP_ADD_TCS(tp)
{
       ATF_TP_ADD_TC(tp, RNDADDDATA);
       ATF_TP_ADD_TC(tp, RNDADDDATA2);
       ATF_TP_ADD_TC(tp, read_random);

       return atf_no_error();
}