1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
23  *
24  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
25  * Use is subject to license terms.
26  */
27 
28 #ifndef	_DHCP_SYMBOL_H
29 #define	_DHCP_SYMBOL_H
30 
31 /*
32  * This file, along with <dhcp_symbol_common.h>, contains the DHCP symbol
33  * constants and the definitions for the external interfaces to the parsing
34  * logic (contained in dhcp_symbol.c) for symbol definitions. These
35  * definitions can and should be used by all consumers of DHCP symbols.
36  */
37 
38 #include <sys/types.h>
39 #include <dhcp_symbol_common.h>
40 
41 #ifdef	__cplusplus
42 extern "C" {
43 #endif
44 
45 /*
46  * Vendor class length (and implicitly, the number of classes)
47  */
48 #define	DSYM_CLASS_SIZE		128			/* Single class max */
49 #define	DSYM_MAX_CLASS_SIZE	(DSYM_CLASS_SIZE * 10)	/* At least 10 */
50 
51 /*
52  * Maximum symbol length
53  */
54 #define	DSYM_MAX_SYM_LEN	128
55 
56 /*
57  * symbol parsing error codes
58  */
59 typedef enum {
60 	DSYM_SUCCESS,
61 	DSYM_SYNTAX_ERROR,
62 	DSYM_NULL_FIELD,
63 	DSYM_TOO_MANY_FIELDS,
64 	DSYM_CODE_OUT_OF_RANGE,
65 	DSYM_VALUE_OUT_OF_RANGE,
66 	DSYM_INVALID_CAT,
67 	DSYM_INVALID_TYPE,
68 	DSYM_EXCEEDS_CLASS_SIZE,
69 	DSYM_EXCEEDS_MAX_CLASS_SIZE,
70 	DSYM_NO_MEMORY,
71 	DSYM_INVALID_FIELD_NUM
72 } dsym_errcode_t;
73 
74 /*
75  * symbol fields
76  */
77 #define	DSYM_CAT_FIELD		0
78 #define	DSYM_CODE_FIELD		1
79 #define	DSYM_TYPE_FIELD		2
80 #define	DSYM_GRAN_FIELD		3
81 #define	DSYM_MAX_FIELD		4
82 #define	DSYM_NUM_FIELDS		5
83 #define	DSYM_FIRST_FIELD	DSYM_CAT_FIELD
84 
85 /*
86  * This structure is used by the dhcp_symbol_t structure below
87  * when the option being defined is a vendor option. In which case,
88  * this structure contains the client classes for which the option
89  * applies.
90  */
91 typedef struct dhcp_classes {
92 	char		**dc_names;
93 	uint8_t		dc_cnt;
94 } dhcp_classes_t;
95 
96 /*
97  * This structure is used to define a DHCP symbol. The structure is
98  * used by both the inittab parsing routines and by the dhcptab parsing
99  * routines to define a symbol definition in either of those tables.
100  * Note that ds_dhcpv6 is defined last so that it needn't be initialized
101  * as part of the inittab_table[] definition.
102  */
103 typedef struct dhcp_symbol {
104 	dsym_category_t	ds_category;			/* category */
105 	ushort_t	ds_code;			/* option code */
106 	char		ds_name[DSYM_MAX_SYM_LEN + 1];	/* option name */
107 	dsym_cdtype_t	ds_type;			/* type of parm */
108 	uchar_t		ds_gran;			/* granularity */
109 	uchar_t		ds_max;				/* maximum number */
110 	dhcp_classes_t	ds_classes;			/* client classes */
111 	uchar_t		ds_dhcpv6;			/* dhcpv6 flag */
112 } dhcp_symbol_t;
113 
114 extern void dsym_free_fields(char **);
115 extern void dsym_free_classes(dhcp_classes_t *);
116 extern void dsym_close_parser(char **, dhcp_symbol_t *);
117 extern dsym_errcode_t dsym_init_parser(const char *, const char *, char ***,
118     dhcp_symbol_t *);
119 extern dsym_errcode_t dsym_parse_field(int, char **, dhcp_symbol_t *);
120 extern dsym_errcode_t dsym_parser(char **, dhcp_symbol_t *, int *, boolean_t);
121 extern dsym_errcode_t dsym_get_cat_id(const char *, dsym_category_t *,
122     boolean_t);
123 extern dsym_errcode_t dsym_get_code_ranges(const char *cat, ushort_t *,
124     ushort_t *, boolean_t);
125 extern dsym_errcode_t dsym_get_type_id(const char *, dsym_cdtype_t *,
126     boolean_t);
127 
128 #ifdef	__cplusplus
129 }
130 #endif
131 
132 #endif	/* _DHCP_SYMBOL_H */
133