86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
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/*
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* An access vector table (avtab) is a hash table
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* of access vectors and transition types indexed
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* by a type pair and a class. An access vector
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* table is used to represent the type enforcement
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* tables.
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*
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* Author : Stephen Smalley, <sds@epoch.ncsc.mil>
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*/
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/* Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
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*
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* Added conditional policy language extensions
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*
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* Copyright (C) 2003 Tresys Technology, LLC
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2.
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*/
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#ifndef _SS_AVTAB_H_
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#define _SS_AVTAB_H_
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struct avtab_key {
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u32 source_type; /* source type */
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u32 target_type; /* target type */
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u32 target_class; /* target object class */
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};
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struct avtab_datum {
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#define AVTAB_ALLOWED 1
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#define AVTAB_AUDITALLOW 2
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#define AVTAB_AUDITDENY 4
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#define AVTAB_AV (AVTAB_ALLOWED | AVTAB_AUDITALLOW | AVTAB_AUDITDENY)
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#define AVTAB_TRANSITION 16
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#define AVTAB_MEMBER 32
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#define AVTAB_CHANGE 64
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#define AVTAB_TYPE (AVTAB_TRANSITION | AVTAB_MEMBER | AVTAB_CHANGE)
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#define AVTAB_ENABLED 0x80000000 /* reserved for used in cond_avtab */
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u32 specified; /* what fields are specified */
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u32 data[3]; /* access vectors or types */
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#define avtab_allowed(x) (x)->data[0]
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#define avtab_auditdeny(x) (x)->data[1]
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#define avtab_auditallow(x) (x)->data[2]
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#define avtab_transition(x) (x)->data[0]
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#define avtab_change(x) (x)->data[1]
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#define avtab_member(x) (x)->data[2]
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};
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struct avtab_node {
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struct avtab_key key;
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struct avtab_datum datum;
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struct avtab_node *next;
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};
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struct avtab {
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struct avtab_node **htable;
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u32 nel; /* number of elements */
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};
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int avtab_init(struct avtab *);
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struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *k, int specified);
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void avtab_destroy(struct avtab *h);
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void avtab_hash_eval(struct avtab *h, char *tag);
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int avtab_read_item(void *fp, struct avtab_datum *avdatum, struct avtab_key *avkey);
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int avtab_read(struct avtab *a, void *fp, u32 config);
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struct avtab_node *avtab_insert_nonunique(struct avtab *h, struct avtab_key *key,
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struct avtab_datum *datum);
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struct avtab_node *avtab_search_node(struct avtab *h, struct avtab_key *key, int specified);
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struct avtab_node *avtab_search_node_next(struct avtab_node *node, int specified);
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void avtab_cache_init(void);
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void avtab_cache_destroy(void);
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#define AVTAB_HASH_BITS 15
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#define AVTAB_HASH_BUCKETS (1 << AVTAB_HASH_BITS)
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#define AVTAB_HASH_MASK (AVTAB_HASH_BUCKETS-1)
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#define AVTAB_SIZE AVTAB_HASH_BUCKETS
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#endif /* _SS_AVTAB_H_ */
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