1/*
2 * This file describes the internal interface used by the labeler
3 * for calling the user-supplied memory allocation, validation,
4 * and locking routine.
5 *
6 * Author : Eamon Walsh <ewalsh@epoch.ncsc.mil>
7 */
8#ifndef _SELABEL_INTERNAL_H_
9#define _SELABEL_INTERNAL_H_
10
11#include <stdlib.h>
12#include <stdarg.h>
13#include <selinux/selinux.h>
14#include <selinux/label.h>
15#include "dso.h"
16
17/*
18 * Installed backends
19 */
20int selabel_file_init(struct selabel_handle *rec, const struct selinux_opt *opts,
21		      unsigned nopts) hidden;
22int selabel_media_init(struct selabel_handle *rec, const struct selinux_opt *opts,
23		      unsigned nopts) hidden;
24int selabel_x_init(struct selabel_handle *rec, const struct selinux_opt *opts,
25		   unsigned nopts) hidden;
26int selabel_db_init(struct selabel_handle *rec,
27		    const struct selinux_opt *opts, unsigned nopts) hidden;
28int selabel_property_init(struct selabel_handle *rec,
29			  const struct selinux_opt *opts, unsigned nopts) hidden;
30
31/*
32 * Labeling internal structures
33 */
34struct selabel_sub {
35	char *src;
36	int slen;
37	char *dst;
38	struct selabel_sub *next;
39};
40
41struct selabel_lookup_rec {
42	char * ctx_raw;
43	char * ctx_trans;
44	int validated;
45};
46
47struct selabel_handle {
48	/* arguments that were passed to selabel_open */
49	unsigned int backend;
50	int validating;
51
52	/* labeling operations */
53	struct selabel_lookup_rec *(*func_lookup) (struct selabel_handle *h,
54						   const char *key, int type);
55	void (*func_close) (struct selabel_handle *h);
56	void (*func_stats) (struct selabel_handle *h);
57	bool (*func_partial_match) (struct selabel_handle *h, const char *key);
58	struct selabel_lookup_rec *(*func_lookup_best_match) (struct selabel_handle *h,
59							 const char *key,
60							 const char **aliases,
61							 int type);
62
63	/* supports backend-specific state information */
64	void *data;
65
66	/* substitution support */
67	struct selabel_sub *subs;
68};
69
70/*
71 * Validation function
72 */
73extern int
74selabel_validate(struct selabel_handle *rec,
75		 struct selabel_lookup_rec *contexts) hidden;
76
77#endif				/* _SELABEL_INTERNAL_H_ */
78