/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (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 2014 Garrett D'Amore <garrett@damore.org>
 *
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _DHCP_SYMBOL_H
#define _DHCP_SYMBOL_H

/*
 * This file, along with <dhcp_symbol_common.h>, contains the DHCP symbol
 * constants and the definitions for the external interfaces to the parsing
 * logic (contained in dhcp_symbol.c) for symbol definitions. These
 * definitions can and should be used by all consumers of DHCP symbols.
 */

#include <sys/types.h>
#include <dhcp_symbol_common.h>

#ifdef  __cplusplus
extern "C" {
#endif

/*
 * Vendor class length (and implicitly, the number of classes)
 */
#define DSYM_CLASS_SIZE         128                     /* Single class max */
#define DSYM_MAX_CLASS_SIZE     (DSYM_CLASS_SIZE * 10)  /* At least 10 */

/*
 * Maximum symbol length
 */
#define DSYM_MAX_SYM_LEN        128

/*
 * symbol parsing error codes
 */
typedef enum {
        DSYM_SUCCESS,
        DSYM_SYNTAX_ERROR,
        DSYM_NULL_FIELD,
        DSYM_TOO_MANY_FIELDS,
        DSYM_CODE_OUT_OF_RANGE,
        DSYM_VALUE_OUT_OF_RANGE,
        DSYM_INVALID_CAT,
        DSYM_INVALID_TYPE,
        DSYM_EXCEEDS_CLASS_SIZE,
        DSYM_EXCEEDS_MAX_CLASS_SIZE,
        DSYM_NO_MEMORY,
        DSYM_INVALID_FIELD_NUM
} dsym_errcode_t;

/*
 * symbol fields
 */
#define DSYM_CAT_FIELD          0
#define DSYM_CODE_FIELD         1
#define DSYM_TYPE_FIELD         2
#define DSYM_GRAN_FIELD         3
#define DSYM_MAX_FIELD          4
#define DSYM_NUM_FIELDS         5
#define DSYM_FIRST_FIELD        DSYM_CAT_FIELD

/*
 * This structure is used by the dhcp_symbol_t structure below
 * when the option being defined is a vendor option. In which case,
 * this structure contains the client classes for which the option
 * applies.
 */
typedef struct dhcp_classes {
        char            **dc_names;
        uint8_t         dc_cnt;
} dhcp_classes_t;

/*
 * This structure is used to define a DHCP symbol. The structure is
 * used by both the inittab parsing routines and by the dhcptab parsing
 * routines to define a symbol definition in either of those tables.
 * Note that ds_dhcpv6 is defined last so that it needn't be initialized
 * as part of the inittab_table[] definition.
 */
typedef struct dhcp_symbol {
        dsym_category_t ds_category;                    /* category */
        ushort_t        ds_code;                        /* option code */
        char            ds_name[DSYM_MAX_SYM_LEN + 1];  /* option name */
        dsym_cdtype_t   ds_type;                        /* type of parm */
        uchar_t         ds_gran;                        /* granularity */
        uchar_t         ds_max;                         /* maximum number */
        dhcp_classes_t  ds_classes;                     /* client classes */
        uchar_t         ds_dhcpv6;                      /* dhcpv6 flag */
} dhcp_symbol_t;

extern void dsym_free_fields(char **);
extern void dsym_free_classes(dhcp_classes_t *);
extern void dsym_close_parser(char **, dhcp_symbol_t *);
extern dsym_errcode_t dsym_init_parser(const char *, const char *, char ***,
    dhcp_symbol_t *);
extern dsym_errcode_t dsym_parse_field(int, char **, dhcp_symbol_t *);
extern dsym_errcode_t dsym_parser(char **, dhcp_symbol_t *, int *, boolean_t);
extern dsym_errcode_t dsym_get_cat_id(const char *, dsym_category_t *,
    boolean_t);
extern dsym_errcode_t dsym_get_code_ranges(const char *cat, ushort_t *,
    ushort_t *, boolean_t);
extern dsym_errcode_t dsym_get_type_id(const char *, dsym_cdtype_t *,
    boolean_t);

#ifdef  __cplusplus
}
#endif

#endif  /* _DHCP_SYMBOL_H */