/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2002, 2004 Networks Associates Technology, Inc.
 * All rights reserved.
 *
 * This software was developed for the FreeBSD Project by NAI Labs, the
 * Security Research Division of Network Associates, Inc. under
 * DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA
 * CHATS research program.
 *
 * 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
 * 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/param.h>
#include <sys/errno.h>
#include <sys/mount.h>
#include <sys/time.h>
#include <sys/sysctl.h>

#include <security/mac_bsdextended/mac_bsdextended.h>

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ugidfw.h>

void add_rule(int argc, char *argv[]);
void list_rules(void);
void remove_rule(int argc, char *argv[]);
void set_rule(int argc, char *argv[]);
void usage(void);

void
usage(void)
{

        fprintf(stderr, "usage: ugidfw add [subject [not] [uid uid] [gid gid]]"
            " [object [not] [uid uid] \\\n");
        fprintf(stderr, "    [gid gid]] mode arswxn\n");
        fprintf(stderr, "       ugidfw list\n");
        fprintf(stderr, "       ugidfw set rulenum [subject [not] [uid uid] [gid gid]]"
            " [object [not] \\\n");
        fprintf(stderr, "    [uid uid] [gid gid]] mode arswxn\n");
        fprintf(stderr, "       ugidfw remove rulenum\n");

        exit(1);
}

void
add_rule(int argc, char *argv[])
{
        char errstr[BUFSIZ], charstr[BUFSIZ];
        struct mac_bsdextended_rule rule;
        int error, rulenum;

        error = bsde_parse_rule(argc, argv, &rule, BUFSIZ, errstr);
        if (error) {
                warnx("%s", errstr);
                return;
        }

        error = bsde_add_rule(&rulenum, &rule, BUFSIZ, errstr);
        if (error) {
                warnx("%s", errstr);
                return;
        }
        if (bsde_rule_to_string(&rule, charstr, BUFSIZ) == -1)
                warnx("Added rule, but unable to print string.");
        else
                printf("%d %s\n", rulenum, charstr);
}

void
list_rules(void)
{
        char errstr[BUFSIZ], charstr[BUFSIZ];
        struct mac_bsdextended_rule rule;
        int error, i, rule_count, rule_slots;

        rule_slots = bsde_get_rule_slots(BUFSIZ, errstr);
        if (rule_slots == -1) {
                warnx("unable to get rule slots; mac_bsdextended.ko "
                    "may not be loaded");
                errx(1, "bsde_get_rule_slots: %s", errstr);
        }

        rule_count = bsde_get_rule_count(BUFSIZ, errstr);
        if (rule_count == -1)
                errx(1, "bsde_get_rule_count: %s", errstr);

        printf("%d slots, %d rules\n", rule_slots, rule_count);

        for (i = 0; i < rule_slots; i++) {
                error = bsde_get_rule(i, &rule, BUFSIZ, errstr);
                switch (error) {
                case -2:
                        continue;
                case -1:
                        warnx("rule %d: %s", i, errstr);
                        continue;
                case 0:
                        break;
                }

                if (bsde_rule_to_string(&rule, charstr, BUFSIZ) == -1)
                        warnx("unable to translate rule %d to string", i);
                else
                        printf("%d %s\n", i, charstr);
        }
}

void
set_rule(int argc, char *argv[])
{
        char errstr[BUFSIZ];
        struct mac_bsdextended_rule rule;
        long value;
        int error, rulenum;
        char *endp;

        if (argc < 1)
                usage();

        value = strtol(argv[0], &endp, 10);
        if (*endp != '\0')
                usage();

        if ((long) value != (int) value || value < 0)
                usage();

        rulenum = value;

        error = bsde_parse_rule(argc - 1, argv + 1, &rule, BUFSIZ, errstr);
        if (error) {
                warnx("%s", errstr);
                return;
        }

        error = bsde_set_rule(rulenum, &rule, BUFSIZ, errstr);
        if (error) {
                warnx("%s", errstr);
                return;
        }
}

void
remove_rule(int argc, char *argv[])
{
        char errstr[BUFSIZ];
        long value;
        int error, rulenum;
        char *endp;

        if (argc != 1)
                usage();

        value = strtol(argv[0], &endp, 10);
        if (*endp != '\0')  
                usage();

        if ((long) value != (int) value || value < 0)
                usage();

        rulenum = value;

        error = bsde_delete_rule(rulenum, BUFSIZ, errstr);
        if (error)
                warnx("%s", errstr);
}

int
main(int argc, char *argv[])
{

        if (argc < 2)
                usage();

        if (strcmp("add", argv[1]) == 0) {
                add_rule(argc-2, argv+2);
        } else if (strcmp("list", argv[1]) == 0) {
                if (argc != 2)
                        usage();
                list_rules();
        } else if (strcmp("set", argv[1]) == 0) {
                set_rule(argc-2, argv+2);
        } else if (strcmp("remove", argv[1]) == 0) {
                remove_rule(argc-2, argv+2);
        } else
                usage();

        return (0);
}