summaryrefslogtreecommitdiff
path: root/src/util/util.h
blob: 3707290180c9835fed33b59720da6a2b049371e7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
/*
    Authors:
        Simo Sorce <ssorce@redhat.com>

    Copyright (C) 2009 Red Hat

    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; either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef __SSSD_UTIL_H__
#define __SSSD_UTIL_H__

#include "config.h"
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <unistd.h>
#include <string.h>
#include <strings.h>
#include <errno.h>
#include <libintl.h>
#include <limits.h>
#include <locale.h>
#include <time.h>
#include <pcre.h>
#include <sys/types.h>
#include <sys/stat.h>

#include <talloc.h>
#include <tevent.h>
#include <ldb.h>
#include <dhash.h>

#include "util/atomic_io.h"

#ifndef HAVE_ERRNO_T
#define HAVE_ERRNO_T
typedef int errno_t;
#endif

#define _(STRING) gettext (STRING)

#define ENUM_INDICATOR "*"

extern const char *debug_prg_name;
extern int debug_level;
extern int debug_timestamps;
extern int debug_microseconds;
extern int debug_to_file;
extern const char *debug_log_file;
void debug_fn(const char *format, ...);
int debug_get_level(int old_level);
int debug_convert_old_level(int old_level);
errno_t set_debug_file_from_fd(const int fd);

#define SSSDBG_FATAL_FAILURE  0x0010   /* level 0 */
#define SSSDBG_CRIT_FAILURE   0x0020   /* level 1 */
#define SSSDBG_OP_FAILURE     0x0040   /* level 2 */
#define SSSDBG_MINOR_FAILURE  0x0080   /* level 3 */
#define SSSDBG_CONF_SETTINGS  0x0100   /* level 4 */
#define SSSDBG_FUNC_DATA      0x0200   /* level 5 */
#define SSSDBG_TRACE_FUNC     0x0400   /* level 6 */
#define SSSDBG_TRACE_LIBS     0x1000   /* level 7 */
#define SSSDBG_TRACE_INTERNAL 0x2000   /* level 8 */
#define SSSDBG_TRACE_ALL      0x4000   /* level 9 */

#define SSSDBG_INVALID        -1
#define SSSDBG_UNRESOLVED     0
#define SSSDBG_MASK_ALL       0xFFF0   /* enable all debug levels */
#define SSSDBG_DEFAULT        SSSDBG_FATAL_FAILURE

#define SSSDBG_TIMESTAMP_UNRESOLVED   -1
#define SSSDBG_TIMESTAMP_DEFAULT       1

#define SSSDBG_MICROSECONDS_UNRESOLVED   -1
#define SSSDBG_MICROSECONDS_DEFAULT       0

#define SSSD_DEBUG_OPTS \
        {"debug-level", 'd', POPT_ARG_INT, &debug_level, 0, \
         _("Debug level"), NULL}, \
        {"debug-to-files", 'f', POPT_ARG_NONE, &debug_to_file, 0, \
         _("Send the debug output to files instead of stderr"), NULL }, \
        {"debug-timestamps", 0, POPT_ARG_INT, &debug_timestamps, 0, \
         _("Add debug timestamps"), NULL}, \
         {"debug-microseconds", 0, POPT_ARG_INT, &debug_microseconds, 0, \
          _("Show timestamps with microseconds"), NULL},

/** \def DEBUG(level, body)
    \brief macro to generate debug messages

    \param level the debug level, please use one of the SSSDBG_* macros
      Old format:
      - 1 is for critical errors users may find it difficult to understand but
        are still quite clear
      - 2-4 is for stuff developers are interested in in general, but
        shouldn't fill the screen with useless low level verbose stuff
      - 5-6 is for errors you may want to track, but only if you explicitly
        looking for additional clues
      - 7-10 is for informational stuff

    \param body the debug message you want to send, should end with \n
*/
#define DEBUG(level, body) do { \
    int __debug_macro_newlevel = debug_get_level(level); \
    if (DEBUG_IS_SET(__debug_macro_newlevel)) { \
        if (debug_timestamps) { \
            struct timeval __debug_macro_tv; \
            struct tm *__debug_macro_tm; \
            char __debug_macro_datetime[20]; \
            int __debug_macro_year; \
            gettimeofday(&__debug_macro_tv, NULL); \
            __debug_macro_tm = localtime(&__debug_macro_tv.tv_sec); \
            __debug_macro_year = __debug_macro_tm->tm_year + 1900; \
            /* get date time without year */ \
            memcpy(__debug_macro_datetime, ctime(&__debug_macro_tv.tv_sec), 19); \
            __debug_macro_datetime[19] = '\0'; \
            if (debug_microseconds) { \
                debug_fn("(%s:%.6d %d) [%s] [%s] (%#.4x): ", \
                         __debug_macro_datetime, __debug_macro_tv.tv_usec, \
                         __debug_macro_year, debug_prg_name, \
                         __FUNCTION__, __debug_macro_newlevel); \
            } else { \
                debug_fn("(%s %d) [%s] [%s] (%#.4x): ", \
                         __debug_macro_datetime, __debug_macro_year, \
                         debug_prg_name, __FUNCTION__, __debug_macro_newlevel); \
            } \
        } else { \
            debug_fn("[%s] [%s] (%#.4x): ", \
                     debug_prg_name, __FUNCTION__, __debug_macro_newlevel); \
        } \
        debug_fn body; \
    } \
} while(0)

/** \def DEBUG_MSG(level, function, message)
    \brief macro to generate debug messages with message from variable

    \param level the debug level, please use one of the SSSDBG_* macros

    \param function name of the function where DEBUG_MSG is called

    \param message message to be send (should not end with \n)
*/
#define DEBUG_MSG(level, function, message) do { \
    int __debug_macro_newlevel = debug_get_level(level); \
    if (DEBUG_IS_SET(__debug_macro_newlevel)) { \
        if (debug_timestamps) { \
            struct timeval __debug_macro_tv; \
            struct tm *__debug_macro_tm; \
            char __debug_macro_datetime[20]; \
            int __debug_macro_year; \
            gettimeofday(&__debug_macro_tv, NULL); \
            __debug_macro_tm = localtime(&__debug_macro_tv.tv_sec); \
            __debug_macro_year = __debug_macro_tm->tm_year + 1900; \
            /* get date time without year */ \
            memcpy(__debug_macro_datetime, ctime(&__debug_macro_tv.tv_sec), 19); \
            __debug_macro_datetime[19] = '\0'; \
            if (debug_microseconds) { \
                debug_fn("(%s:%.6d %d) [%s] [%s] (%#.4x): %s\n", \
                         __debug_macro_datetime, __debug_macro_tv.tv_usec, \
                         __debug_macro_year, debug_prg_name, \
                         function, __debug_macro_newlevel, message); \
            } else { \
                debug_fn("(%s %d) [%s] [%s] (%#.4x): %s\n", \
                         __debug_macro_datetime, __debug_macro_year, \
                         debug_prg_name, function, __debug_macro_newlevel, \
                         message); \
            } \
        } else { \
            debug_fn("[%s] [%s] (%#.4x): %s\n", \
                     debug_prg_name, function, __debug_macro_newlevel, message); \
        } \
    } \
} while(0)

/** \def DEBUG_IS_SET(level)
    \brief checks whether level (must be in new format) is set in debug_level

    \param level the debug level, please use one of the SSSDBG*_ macros
*/
#define DEBUG_IS_SET(level) (debug_level & (level))

#define CONVERT_AND_SET_DEBUG_LEVEL(new_value) debug_level = ( \
    ((new_value) != SSSDBG_INVALID) \
    ? debug_convert_old_level(new_value) \
    : SSSDBG_UNRESOLVED /* Debug level should be loaded from config file. */ \
);

#define PRINT(fmt, ...) fprintf(stdout, gettext(fmt), ##__VA_ARGS__)
#define ERROR(fmt, ...) fprintf(stderr, gettext(fmt), ##__VA_ARGS__)

#ifndef discard_const
#define discard_const(ptr) ((void *)((uintptr_t)(ptr)))
#endif

#ifndef NULL
#define NULL 0
#endif

#define ZERO_STRUCT(x) memset((char *)&(x), 0, sizeof(x))

#define EOK 0

#define SSSD_MAIN_OPTS SSSD_DEBUG_OPTS

#define FLAGS_NONE 0x0000
#define FLAGS_DAEMON 0x0001
#define FLAGS_INTERACTIVE 0x0002
#define FLAGS_PID_FILE 0x0004

#ifndef talloc_zfree
#define talloc_zfree(ptr) do { \
        TALLOC_CTX *_tmp_ctx = ptr; \
        ptr = NULL; \
        talloc_free(_tmp_ctx); \
    } while(0)
#endif

#ifndef discard_const_p
#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T)
# define discard_const_p(type, ptr) ((type *)((intptr_t)(ptr)))
#else
# define discard_const_p(type, ptr) ((type *)(ptr))
#endif
#endif

/* TODO: remove later
 * These functions are available in the latest tevent and are the ones that
 * should be used as tevent_req is rightfully opaque there */
#ifndef tevent_req_data
#define tevent_req_data(req, type) ((type *)req->private_state)
#define tevent_req_set_callback(req, func, data) \
    do { req->async.fn = func; req->async.private_data = data; } while(0)
#define tevent_req_callback_data(req, type) ((type *)req->async.private_data)
#define tevent_req_notify_callback(req) \
    do { \
        if (req->async.fn != NULL) { \
            req->async.fn(req); \
        } \
    } while(0)

/* noop */
#define tevent_loop_allow_nesting(x)
#endif

#define TEVENT_REQ_RETURN_ON_ERROR(req) do { \
    enum tevent_req_state TRROEstate; \
    uint64_t TRROEerr; \
    \
    if (tevent_req_is_error(req, &TRROEstate, &TRROEerr)) { \
        if (TRROEstate == TEVENT_REQ_USER_ERROR) { \
            return TRROEerr; \
        } \
        return EIO; \
    } \
} while (0)

#define OUT_OF_ID_RANGE(id, min, max) \
    (id == 0 || (min && (id < min)) || (max && (id > max)))

#define SIZE_T_MAX ((size_t) -1)

#define SIZE_T_OVERFLOW(current, add) \
                        (((size_t)(add)) > (SIZE_T_MAX - ((size_t)(current))))

static inline void
safealign_memcpy(void *dest, const void *src, size_t n, size_t *counter)
{
    memcpy(dest, src, n);
    if (counter) {
        *counter += n;
    }
}

#define SAFEALIGN_SET_VALUE(dest, value, type, pctr) do { \
    type CV_MACRO_val = (type)(value); \
    safealign_memcpy(dest, &CV_MACRO_val, sizeof(type), pctr); \
} while(0)

#define SAFEALIGN_COPY_INT64(dest, src, pctr) \
    safealign_memcpy(dest, src, sizeof(int64_t), pctr)

#define SAFEALIGN_SET_INT64(dest, value, pctr) \
    SAFEALIGN_SET_VALUE(dest, value, int64_t, pctr)

#define SAFEALIGN_COPY_UINT32(dest, src, pctr) \
    safealign_memcpy(dest, src, sizeof(uint32_t), pctr)

#define SAFEALIGN_SET_UINT32(dest, value, pctr) \
    SAFEALIGN_SET_VALUE(dest, value, uint32_t, pctr)

#define SAFEALIGN_COPY_INT32(dest, src, pctr) \
    safealign_memcpy(dest, src, sizeof(int32_t), pctr)

#define SAFEALIGN_SET_INT32(dest, value, pctr) \
    SAFEALIGN_SET_VALUE(dest, value, int32_t, pctr)

#define SAFEALIGN_COPY_UINT16(dest, src, pctr) \
    safealign_memcpy(dest, src, sizeof(uint16_t), pctr)

#define SAFEALIGN_SET_UINT16(dest, value, pctr) \
    SAFEALIGN_SET_VALUE(dest, value, uint16_t, pctr)

#define SAFEALIGN_COPY_UINT32_CHECK(dest, src, len, pctr) do { \
    if ((*(pctr) + sizeof(uint32_t)) > (len) || \
        SIZE_T_OVERFLOW(*(pctr), sizeof(uint32_t))) return EINVAL; \
    safealign_memcpy(dest, src, sizeof(uint32_t), pctr); \
} while(0)

#define SAFEALIGN_COPY_INT32_CHECK(dest, src, len, pctr) do { \
    if ((*(pctr) + sizeof(int32_t)) > (len) || \
        SIZE_T_OVERFLOW(*(pctr), sizeof(int32_t))) return EINVAL; \
    safealign_memcpy(dest, src, sizeof(int32_t), pctr); \
} while(0)

#define SAFEALIGN_COPY_UINT16_CHECK(dest, src, len, pctr) do { \
    if ((*(pctr) + sizeof(uint16_t)) > (len) || \
        SIZE_T_OVERFLOW(*(pctr), sizeof(uint16_t))) return EINVAL; \
    safealign_memcpy(dest, src, sizeof(uint16_t), pctr); \
} while(0)

#include "util/dlinklist.h"

/* From debug.c */
void ldb_debug_messages(void *context, enum ldb_debug_level level,
                        const char *fmt, va_list ap);
int open_debug_file_ex(const char *filename, FILE **filep);
int open_debug_file(void);
int rotate_debug_files(void);

/* From sss_log.c */
#define SSS_LOG_EMERG   0   /* system is unusable */
#define SSS_LOG_ALERT   1   /* action must be taken immediately */
#define SSS_LOG_CRIT    2   /* critical conditions */
#define SSS_LOG_ERR     3   /* error conditions */
#define SSS_LOG_WARNING 4   /* warning conditions */
#define SSS_LOG_NOTICE  5   /* normal but significant condition */
#define SSS_LOG_INFO    6   /* informational */
#define SSS_LOG_DEBUG   7   /* debug-level messages */

void sss_log(int priority, const char *format, ...);

/* from server.c */
struct main_context {
    struct tevent_context *event_ctx;
    struct confdb_ctx *confdb_ctx;
};

int die_if_parent_died(void);
int server_setup(const char *name, int flags,
                 const char *conf_entry,
                 struct main_context **main_ctx);
void server_loop(struct main_context *main_ctx);
void sig_term(int sig);

/* from signal.c */
#include <signal.h>
void BlockSignals(bool block, int signum);
void (*CatchSignal(int signum,void (*handler)(int )))(int);
void CatchChild(void);
void CatchChildLeaveStatus(void);

/* from memory.c */
typedef int (void_destructor_fn_t)(void *);

struct mem_holder {
    void *mem;
    void_destructor_fn_t *fn;
};

void *sss_mem_attach(TALLOC_CTX *mem_ctx,
                     void *ptr,
                     void_destructor_fn_t *fn);

int password_destructor(void *memctx);

/* from usertools.c */
char *get_username_from_uid(TALLOC_CTX *mem_ctx, uid_t uid);

struct sss_names_ctx {
    char *re_pattern;
    char *fq_fmt;

    pcre *re;
};

int sss_names_init(TALLOC_CTX *mem_ctx,
                   struct confdb_ctx *cdb,
                   struct sss_names_ctx **out);

int sss_parse_name(TALLOC_CTX *memctx,
                   struct sss_names_ctx *snctx,
                   const char *orig, char **domain, char **name);

char *
sss_get_cased_name(TALLOC_CTX *mem_ctx, const char *orig_name,
                   bool case_sensitive);

errno_t
sss_get_cased_name_list(TALLOC_CTX *mem_ctx, const char * const *orig,
                        bool case_sensitive, const char ***_cased);

/* from backup-file.c */
int backup_file(const char *src, int dbglvl);

/* from check_and_open.c */
enum check_file_type {
    CHECK_DONT_CHECK_FILE_TYPE = -1,
    CHECK_REG,
    CHECK_DIR,
    CHECK_CHR,
    CHECK_BLK,
    CHECK_FIFO,
    CHECK_LNK,
    CHECK_SOCK
};

/* check_file()
 * Verify that a file has certain permissions and/or is of a certain
 * file type. This function can be used to determine if a file is a
 * symlink.
 * Warning: use of this function implies a potential race condition
 * Opening a file before or after checking it does NOT guarantee that
 * it is still the same file. Additional checks should be performed
 * on the caller_stat_buf to ensure that it has the same device and
 * inode to minimize impact. Permission changes may have occurred,
 * however.
 */
errno_t check_file(const char *filename, const int uid, const int gid,
                   const int mode, enum check_file_type type,
                   struct stat *caller_stat_buf, bool follow_symlink);

/* check_fd()
 * Verify that an open file descriptor has certain permissions and/or
 * is of a certain file type. This function CANNOT detect symlinks,
 * as the file is already open and symlinks have been traversed. This
 * is the safer way to perform file checks and should be preferred
 * over check_file for nearly all situations.
 */
errno_t check_fd(int fd, const int uid, const int gid,
                 const int mode, enum check_file_type type,
                 struct stat *caller_stat_buf);

/* check_and_open_readonly()
 * Utility function to open a file and verify that it has certain
 * permissions and is of a certain file type. This function wraps
 * check_fd(), and is considered race-condition safe.
 */
errno_t check_and_open_readonly(const char *filename, int *fd, const uid_t uid,
                               const gid_t gid, const mode_t mode,
                               enum check_file_type type);

/* from util.c */
int split_on_separator(TALLOC_CTX *mem_ctx, const char *str,
                       const char sep, bool trim, char ***_list, int *size);

char **parse_args(const char *str);

errno_t sss_hash_create(TALLOC_CTX *mem_ctx,
                        unsigned long count,
                        hash_table_t **tbl);

errno_t sss_hash_create_ex(TALLOC_CTX *mem_ctx,
                           unsigned long count,
                           hash_table_t **tbl,
                           unsigned int directory_bits,
                           unsigned int segment_bits,
                           unsigned long min_load_factor,
                           unsigned long max_load_factor,
                           hash_delete_callback *delete_callback,
                           void *delete_private_data);

/* Copy a NULL-terminated string list
 * Returns NULL on out of memory error or invalid input
 */
char **dup_string_list(TALLOC_CTX *memctx, const char **str_list);

/* Take two string lists (terminated on a NULL char*)
 * and return up to three arrays of strings based on
 * shared ownership.
 *
 * Pass NULL to any return type you don't care about
 */
errno_t diff_string_lists(TALLOC_CTX *memctx,
                          char **string1,
                          char **string2,
                          char ***string1_only,
                          char ***string2_only,
                          char ***both_strings);

/* Sanitize an input string (e.g. a username) for use in
 * an LDAP/LDB filter
 * Returns a newly-constructed string attached to mem_ctx
 * It will fail only on an out of memory condition, where it
 * will return ENOMEM.
 */
errno_t sss_filter_sanitize(TALLOC_CTX *mem_ctx,
                            const char *input,
                            char **sanitized);

char *
sss_escape_ip_address(TALLOC_CTX *mem_ctx, int family, const char *addr);

/* from sss_tc_utf8.c */
char *
sss_tc_utf8_str_tolower(TALLOC_CTX *mem_ctx, const char *s);
uint8_t *
sss_tc_utf8_tolower(TALLOC_CTX *mem_ctx, const uint8_t *s, size_t len, size_t *_nlen);
bool sss_string_equal(bool cs, const char *s1, const char *s2);

/* len includes terminating '\0' */
struct sized_string {
    const char *str;
    size_t len;
};

void to_sized_string(struct sized_string *out, const char *in);

/* form domain_info.c */
struct sss_domain_info *new_subdomain(TALLOC_CTX *mem_ctx,
                                      struct sss_domain_info *parent,
                                      const char *name,
                                      const char *flat_name,
                                      const char *id);
struct sss_domain_info *copy_subdomain(TALLOC_CTX *mem_ctx,
                                       struct sss_domain_info *subdomain);

#endif /* __SSSD_UTIL_H__ */