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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2000 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef _DHCPTAB_H
#define _DHCPTAB_H
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Implementation-specific data structures and constants for the binary
* dhcptab container. These structures are subject to change at any time.
*/
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/types.h>
#include <dhcp_svc_public.h>
#define DT_NOREC 0 /* "no record" id value */
#define DT_MAGIC 0x0d6c94ab /* "dhcptab" in a hexadecimal world */
/*
* Constants for use with find_dt
*/
#define FIND_PARTIAL 0x0001 /* allow partial success */
#define FIND_POSITION 0x0002 /* return dt_recpos_t's */
/*
* Header atop the dhcptab container -- contains some basic information
* about the container for sanity-checking purposes.
*/
typedef struct dt_header {
unsigned char dth_version; /* container version */
unsigned char dth_align[3]; /* ensure binary compatibility */
uint32_t dth_magic; /* magic for sanity check */
uint32_t dth_pad[4]; /* for future use */
} dt_header_t;
/*
* What each dt_rec_t looks like on-disk -- note that we cannot just write
* dt_rec_t's because the `dt_value' field can be arbitrarily large.
* Instead, write out the dt_rec_t structure followed by the variable-size
* `rec_dtval' array which will contain the current value of `dt_value'.
* Since `rec_dtval' is of variable size, we must explicitly keep track of
* its length via `rec_dtvalsize'.
*/
typedef struct dt_filerec {
dt_rec_t rec_dt; /* actual dt_rec_t */
uint32_t rec_dtvalsize; /* total size of rec_dtval */
char rec_dtval[1]; /* dt_value field from dt_rec_t */
} dt_filerec_t;
/*
* Per-record state describing the underlying record, including its
* position on-disk; these are returned instead of dt_rec_t's when find_dt
* is called with FIND_POSITION set. Note that for this to work, the
* dt_rec_t must be the first member.
*/
typedef struct dt_recpos {
dt_rec_t dtp_rec; /* traditional dt_rec_t */
size_t dtp_size; /* its size in the file */
off_t dtp_off; /* its starting offset in the file */
} dt_recpos_t;
/*
* Per-instance state for each handle returned from open_dt
*/
typedef struct dt_handle {
unsigned int dh_oflags; /* flags passed into open_dt */
char dh_location[MAXPATHLEN]; /* location of container */
} dt_handle_t;
#ifdef __cplusplus
}
#endif
#endif /* _DHCPTAB_H */
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