/*-
 * Copyright (c) 2018 Aniket Pandey
 *
 * 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 AUTHOR 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 AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * 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
 * SUCH DAMAGE.
 */

#include <sys/ioctl.h>

#include <bsm/audit.h>
#include <security/audit/audit_ioctl.h>

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

static int filedesc;
static FILE *fileptr;

ATF_TC(auditpipe_get_qlen);
ATF_TC_HEAD(auditpipe_get_qlen, tc)
{
        atf_tc_set_md_var(tc, "descr", "Verifies whether the auditpipe ioctl, "
                                        "AUDITPIPE_GET_QLEN works properly");
}

ATF_TC_BODY(auditpipe_get_qlen, tc)
{
        int qlen = -1;
        ATF_REQUIRE((filedesc = open("/dev/auditpipe", O_RDONLY)) != -1);
        ATF_REQUIRE_EQ(0, ioctl(filedesc, AUDITPIPE_GET_QLEN, &qlen));
        ATF_REQUIRE(qlen != -1);
        close(filedesc);
}


ATF_TC(auditpipe_get_qlimit);
ATF_TC_HEAD(auditpipe_get_qlimit, tc)
{
        atf_tc_set_md_var(tc, "descr", "Verifies whether the auditpipe ioctl, "
                                        "AUDITPIPE_GET_QLIMIT works properly");
}

ATF_TC_BODY(auditpipe_get_qlimit, tc)
{
        int qlimit = -1;
        ATF_REQUIRE((filedesc = open("/dev/auditpipe", O_RDONLY)) != -1);
        ATF_REQUIRE_EQ(0, ioctl(filedesc, AUDITPIPE_GET_QLIMIT, &qlimit));
        ATF_REQUIRE(qlimit != -1);
        close(filedesc);
}


ATF_TC_WITH_CLEANUP(auditpipe_set_qlimit);
ATF_TC_HEAD(auditpipe_set_qlimit, tc)
{
        atf_tc_set_md_var(tc, "descr", "Verifies whether the auditpipe ioctl, "
                                        "AUDITPIPE_SET_QLIMIT works properly");
}

ATF_TC_BODY(auditpipe_set_qlimit, tc)
{
        int test_qlimit, curr_qlimit, recv_qlimit;

        ATF_REQUIRE((filedesc = open("/dev/auditpipe", O_RDONLY)) != -1);
        /* Retreive the current QLIMIT value and store it in a file */
        ATF_REQUIRE_EQ(0, ioctl(filedesc, AUDITPIPE_GET_QLIMIT, &curr_qlimit));
        ATF_REQUIRE((fileptr = fopen("qlimit_store", "a")) != NULL);
        ATF_REQUIRE_EQ(sizeof(curr_qlimit),
                fprintf(fileptr, "%d\n", curr_qlimit));

        /*
         * Set QLIMIT different from the current system value to confirm
         * proper functioning of AUDITPIPE_SET_QLIMIT ioctl.
         */
        test_qlimit = curr_qlimit - 1;
        ATF_REQUIRE_EQ(0, ioctl(filedesc, AUDITPIPE_SET_QLIMIT, &test_qlimit));
        /* Receive modified value and check whether QLIMIT was set correctly */
        ATF_REQUIRE_EQ(0, ioctl(filedesc, AUDITPIPE_GET_QLIMIT, &recv_qlimit));
        ATF_REQUIRE_EQ(test_qlimit, recv_qlimit);

        fclose(fileptr);
        close(filedesc);
}

ATF_TC_CLEANUP(auditpipe_set_qlimit, tc)
{
        if (atf_utils_file_exists("qlimit_store")) {
                int fd, curr_qlim;
                ATF_REQUIRE((fileptr = fopen("qlimit_store", "r")) != NULL);
                ATF_REQUIRE(fscanf(fileptr, "%d", &curr_qlim));

                ATF_REQUIRE((fd = open("/dev/auditpipe", O_RDONLY)) != -1);
                /* Set QLIMIT's value as it was prior to test-case invocation */
                ATF_REQUIRE_EQ(0, ioctl(fd, AUDITPIPE_SET_QLIMIT, &curr_qlim));

                close(fd);
                fclose(fileptr);
        }
}


ATF_TC(auditpipe_get_qlimit_min);
ATF_TC_HEAD(auditpipe_get_qlimit_min, tc)
{
        atf_tc_set_md_var(tc, "descr", "Verifies whether the auditpipe ioctl, "
                                "AUDITPIPE_GET_QLIMIT_MIN works properly");
}

ATF_TC_BODY(auditpipe_get_qlimit_min, tc)
{
        int qlim_min = -1;
        ATF_REQUIRE((filedesc = open("/dev/auditpipe", O_RDONLY)) != -1);
        ATF_REQUIRE_EQ(0, ioctl(filedesc, AUDITPIPE_GET_QLIMIT_MIN, &qlim_min));
        ATF_REQUIRE(qlim_min != -1);
        close(filedesc);
}


ATF_TC(auditpipe_get_qlimit_max);
ATF_TC_HEAD(auditpipe_get_qlimit_max, tc)
{
        atf_tc_set_md_var(tc, "descr", "Verifies whether the auditpipe ioctl, "
                                "AUDITPIPE_GET_QLIMIT_MAX works properly");
}

ATF_TC_BODY(auditpipe_get_qlimit_max, tc)
{
        int qlim_max = -1;
        ATF_REQUIRE((filedesc = open("/dev/auditpipe", O_RDONLY)) != -1);
        ATF_REQUIRE_EQ(0, ioctl(filedesc, AUDITPIPE_GET_QLIMIT_MAX, &qlim_max));
        ATF_REQUIRE(qlim_max != -1);
        close(filedesc);
}


ATF_TC(auditpipe_get_maxauditdata);
ATF_TC_HEAD(auditpipe_get_maxauditdata, tc)
{
        atf_tc_set_md_var(tc, "descr", "Verifies whether the auditpipe ioctl, "
                                "AUDITPIPE_GET_MAXAUDITDATA works properly");
}

ATF_TC_BODY(auditpipe_get_maxauditdata, tc)
{
        int audata = -1;
        ATF_REQUIRE((filedesc = open("/dev/auditpipe", O_RDONLY)) != -1);
        ATF_REQUIRE_EQ(0, ioctl(filedesc, AUDITPIPE_GET_MAXAUDITDATA, &audata));
        ATF_REQUIRE(audata != -1);
        close(filedesc);
}


ATF_TP_ADD_TCS(tp)
{
        ATF_TP_ADD_TC(tp, auditpipe_get_qlen);
        ATF_TP_ADD_TC(tp, auditpipe_get_qlimit);
        ATF_TP_ADD_TC(tp, auditpipe_set_qlimit);
        ATF_TP_ADD_TC(tp, auditpipe_get_qlimit_min);
        ATF_TP_ADD_TC(tp, auditpipe_get_qlimit_max);
        ATF_TP_ADD_TC(tp, auditpipe_get_maxauditdata);

        return (atf_no_error());
}