/*-
 * Copyright (c) 1999, Andrzej Bialecki <abial@freebsd.org>
 * 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 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.
 *
 *	$Id: spy.h,v 1.1 1999/11/21 19:27:55 root Exp $
 */

#ifndef __SPY_H_
#define __SPY_H_

/* this structure is used to set up per-syscall options */
struct spy_ctl {
	char *name;
	u_int32_t opt;
	uid_t uid;
	gid_t gid;
};

/* SPY opt */
#define	SPY_NONE	0x0000
#define	SPY_USER	0x0001
#define	SPY_ROOT	0x0002
#define	SPY_UID		0x0004
#define	SPY_GID		0x0008
#define	SPY_ALL		(SPY_USER | SPY_ROOT)

#define	SPY_ARGS	0x0010
#define	SPY_OTHER	0x0020
#define	SPY_FULL	(SPY_ARGS | SPY_OTHER)

#define	SPY_OPTNUM	6

char *spy_opt[]={
	"user",
	"root",
	"uid",
	"gid",
	"args",
	"other"
};

struct spy_ent {
	u_char inuse;		/* currently is intercepted */
	u_int64_t used;		/* how many times it was intercepted */
	u_char block;		/* disable this syscall, based on opt */
	u_int32_t opt;		/* log level and opt */
	uid_t uid;		/* optional value for opt */
	gid_t gid;		/* optional value for opt */
	struct sysent o;	/* original sysent */
	struct sysent n;	/* new sysent */
	void (*handler)(struct proc *p, void *arg, u_int32_t opt);
				/* handler for syscall arguments */
};

#ifdef _KERNEL
/* From /sys/kern/syscalls.c */
extern char *syscallnames[];

static sy_call_t spy_dispatch;

static void format_opt(char *buf, u_int *opt, uid_t *uid, gid_t *gid);
static u_int parse_opt(char *buf, uid_t *uid, gid_t *gid);
static int parse_sysc_opt(char *buf, u_int *opt, uid_t *uid, gid_t *gid);
static void spy_execve(struct proc *p, void *arg, u_int32_t opt);
static void spy_chdir(struct proc *p, void *arg, u_int32_t opt);
static void spy_setuid(struct proc *p, void *arg, u_int32_t opt);
static void spy_setgid(struct proc *p, void *arg, u_int32_t opt);
static void spy_open(struct proc *p, void *arg, u_int32_t opt);
static void spy_link(struct proc *p, void *arg, u_int32_t opt);
static void spy_unlink(struct proc *p, void *arg, u_int32_t opt);
static void spy_chmod(struct proc *p, void *arg, u_int32_t opt);
static void spy_chown(struct proc *p, void *arg, u_int32_t opt);
static void spy_mount(struct proc *p, void *arg, u_int32_t opt);

static void start_spy(u_int64_t);
static void stop_spy(u_int64_t);
static void sysc_disable(u_int64_t);
static void sysc_enable(u_int64_t);
#endif

#endif