1/* SPDX-License-Identifier: GPL-2.0-only */
 2/* Authors: Karl MacMillan <kmacmillan@tresys.com>
 3 *          Frank Mayer <mayerf@tresys.com>
 4 *
 5 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
 6 */
 7
 8#ifndef _CONDITIONAL_H_
 9#define _CONDITIONAL_H_
10
11#include "avtab.h"
12#include "symtab.h"
13#include "policydb.h"
14#include "../include/conditional.h"
15
16#define COND_EXPR_MAXDEPTH 10
17
18/*
19 * A conditional expression is a list of operators and operands
20 * in reverse polish notation.
21 */
 
 
 
 
 
 
 
 
 
 
 
 
 
22struct cond_expr {
23#define COND_BOOL	1 /* plain bool */
24#define COND_NOT	2 /* !bool */
25#define COND_OR		3 /* bool || bool */
26#define COND_AND	4 /* bool && bool */
27#define COND_XOR	5 /* bool ^ bool */
28#define COND_EQ		6 /* bool == bool */
29#define COND_NEQ	7 /* bool != bool */
30#define COND_LAST	COND_NEQ
31	__u32 expr_type;
32	__u32 bool;
33	struct cond_expr *next;
34};
35
36/*
37 * Each cond_node contains a list of rules to be enabled/disabled
38 * depending on the current value of the conditional expression. This
39 * struct is for that list.
40 */
41struct cond_av_list {
42	struct avtab_node *node;
43	struct cond_av_list *next;
44};
45
46/*
47 * A cond node represents a conditional block in a policy. It
48 * contains a conditional expression, the current state of the expression,
49 * two lists of rules to enable/disable depending on the value of the
50 * expression (the true list corresponds to if and the false list corresponds
51 * to else)..
52 */
53struct cond_node {
54	int cur_state;
55	struct cond_expr *expr;
56	struct cond_av_list *true_list;
57	struct cond_av_list *false_list;
58	struct cond_node *next;
59};
60
61int cond_policydb_init(struct policydb *p);
62void cond_policydb_destroy(struct policydb *p);
63
64int cond_init_bool_indexes(struct policydb *p);
65int cond_destroy_bool(void *key, void *datum, void *p);
66
67int cond_index_bool(void *key, void *datum, void *datap);
68
69int cond_read_bool(struct policydb *p, struct hashtab *h, void *fp);
70int cond_read_list(struct policydb *p, void *fp);
71int cond_write_bool(void *key, void *datum, void *ptr);
72int cond_write_list(struct policydb *p, struct cond_node *list, void *fp);
73
74void cond_compute_av(struct avtab *ctab, struct avtab_key *key,
75		struct av_decision *avd, struct extended_perms *xperms);
76void cond_compute_xperms(struct avtab *ctab, struct avtab_key *key,
77		struct extended_perms_decision *xpermd);
78int evaluate_cond_node(struct policydb *p, struct cond_node *node);
 
 
79
80#endif /* _CONDITIONAL_H_ */

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/* Authors: Karl MacMillan <kmacmillan@tresys.com>
 3 *          Frank Mayer <mayerf@tresys.com>
 4 *          Copyright (C) 2003 - 2004 Tresys Technology, LLC
 
 5 */
 6
 7#ifndef _CONDITIONAL_H_
 8#define _CONDITIONAL_H_
 9
10#include "avtab.h"
11#include "symtab.h"
12#include "policydb.h"
13#include "../include/conditional.h"
14
15#define COND_EXPR_MAXDEPTH 10
16
17/*
18 * A conditional expression is a list of operators and operands
19 * in reverse polish notation.
20 */
21struct cond_expr_node {
22#define COND_BOOL 1 /* plain bool */
23#define COND_NOT  2 /* !bool */
24#define COND_OR	  3 /* bool || bool */
25#define COND_AND  4 /* bool && bool */
26#define COND_XOR  5 /* bool ^ bool */
27#define COND_EQ	  6 /* bool == bool */
28#define COND_NEQ  7 /* bool != bool */
29#define COND_LAST COND_NEQ
30	u32 expr_type;
31	u32 boolean;
32};
33
34struct cond_expr {
35	struct cond_expr_node *nodes;
36	u32 len;
 
 
 
 
 
 
 
 
 
37};
38
39/*
40 * Each cond_node contains a list of rules to be enabled/disabled
41 * depending on the current value of the conditional expression. This
42 * struct is for that list.
43 */
44struct cond_av_list {
45	struct avtab_node **nodes;
46	u32 len;
47};
48
49/*
50 * A cond node represents a conditional block in a policy. It
51 * contains a conditional expression, the current state of the expression,
52 * two lists of rules to enable/disable depending on the value of the
53 * expression (the true list corresponds to if and the false list corresponds
54 * to else)..
55 */
56struct cond_node {
57	int cur_state;
58	struct cond_expr expr;
59	struct cond_av_list true_list;
60	struct cond_av_list false_list;
 
61};
62
63void cond_policydb_init(struct policydb *p);
64void cond_policydb_destroy(struct policydb *p);
65
66int cond_init_bool_indexes(struct policydb *p);
67int cond_destroy_bool(void *key, void *datum, void *p);
68
69int cond_index_bool(void *key, void *datum, void *datap);
70
71int cond_read_bool(struct policydb *p, struct symtab *s, void *fp);
72int cond_read_list(struct policydb *p, void *fp);
73int cond_write_bool(void *key, void *datum, void *ptr);
74int cond_write_list(struct policydb *p, void *fp);
75
76void cond_compute_av(struct avtab *ctab, struct avtab_key *key,
77		     struct av_decision *avd, struct extended_perms *xperms);
78void cond_compute_xperms(struct avtab *ctab, struct avtab_key *key,
79			 struct extended_perms_decision *xpermd);
80void evaluate_cond_nodes(struct policydb *p);
81void cond_policydb_destroy_dup(struct policydb *p);
82int cond_policydb_dup(struct policydb *new, const struct policydb *orig);
83
84#endif /* _CONDITIONAL_H_ */