83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
|
/* Authors: Karl MacMillan <kmacmillan@tresys.com>
|
||
|
|
* Frank Mayer <mayerf@tresys.com>
|
||
|
|
*
|
||
|
|
* Copyright (C) 2003 - 2004 Tresys Technology, LLC
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation, version 2.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _CONDITIONAL_H_
|
||
|
|
#define _CONDITIONAL_H_
|
||
|
|
|
||
|
|
#include "avtab.h"
|
||
|
|
#include "symtab.h"
|
||
|
|
#include "policydb.h"
|
||
|
|
#include "../include/conditional.h"
|
||
|
|
|
||
|
|
#define COND_EXPR_MAXDEPTH 10
|
||
|
|
|
||
|
|
/*
|
||
|
|
* A conditional expression is a list of operators and operands
|
||
|
|
* in reverse polish notation.
|
||
|
|
*/
|
||
|
|
struct cond_expr {
|
||
|
|
#define COND_BOOL 1 /* plain bool */
|
||
|
|
#define COND_NOT 2 /* !bool */
|
||
|
|
#define COND_OR 3 /* bool || bool */
|
||
|
|
#define COND_AND 4 /* bool && bool */
|
||
|
|
#define COND_XOR 5 /* bool ^ bool */
|
||
|
|
#define COND_EQ 6 /* bool == bool */
|
||
|
|
#define COND_NEQ 7 /* bool != bool */
|
||
|
|
#define COND_LAST COND_NEQ
|
||
|
|
__u32 expr_type;
|
||
|
|
__u32 bool;
|
||
|
|
struct cond_expr *next;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Each cond_node contains a list of rules to be enabled/disabled
|
||
|
|
* depending on the current value of the conditional expression. This
|
||
|
|
* struct is for that list.
|
||
|
|
*/
|
||
|
|
struct cond_av_list {
|
||
|
|
struct avtab_node *node;
|
||
|
|
struct cond_av_list *next;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* A cond node represents a conditional block in a policy. It
|
||
|
|
* contains a conditional expression, the current state of the expression,
|
||
|
|
* two lists of rules to enable/disable depending on the value of the
|
||
|
|
* expression (the true list corresponds to if and the false list corresponds
|
||
|
|
* to else)..
|
||
|
|
*/
|
||
|
|
struct cond_node {
|
||
|
|
int cur_state;
|
||
|
|
struct cond_expr *expr;
|
||
|
|
struct cond_av_list *true_list;
|
||
|
|
struct cond_av_list *false_list;
|
||
|
|
struct cond_node *next;
|
||
|
|
};
|
||
|
|
|
||
|
|
int cond_policydb_init(struct policydb *p);
|
||
|
|
void cond_policydb_destroy(struct policydb *p);
|
||
|
|
|
||
|
|
int cond_init_bool_indexes(struct policydb *p);
|
||
|
|
int cond_destroy_bool(void *key, void *datum, void *p);
|
||
|
|
|
||
|
|
int cond_index_bool(void *key, void *datum, void *datap);
|
||
|
|
|
||
|
|
int cond_read_bool(struct policydb *p, struct hashtab *h, void *fp);
|
||
|
|
int cond_read_list(struct policydb *p, void *fp);
|
||
|
|
int cond_write_bool(void *key, void *datum, void *ptr);
|
||
|
|
int cond_write_list(struct policydb *p, struct cond_node *list, void *fp);
|
||
|
|
|
||
|
|
void cond_compute_av(struct avtab *ctab, struct avtab_key *key,
|
||
|
|
struct av_decision *avd, struct extended_perms *xperms);
|
||
|
|
void cond_compute_xperms(struct avtab *ctab, struct avtab_key *key,
|
||
|
|
struct extended_perms_decision *xpermd);
|
||
|
|
int evaluate_cond_node(struct policydb *p, struct cond_node *node);
|
||
|
|
|
||
|
|
#endif /* _CONDITIONAL_H_ */
|