1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 - 2021 */
7 /* See the file NOTICE for conditions of use and distribution. */
9 /* This header file contains macro definitions so that a variety of DBM
10 libraries can be used by Exim. Nigel Metheringham provided the original set for
11 Berkeley DB 1.x in native mode and ndbm. Subsequently, versions for Berkeley DB
12 2.x and 3.x were added. Later still, support for tdb was added, courtesy of
13 James Antill. Most recently, support for native mode gdbm was added, with code
14 from Pierre A. Humblet, so Exim could be made to work with Cygwin.
16 For convenience, the definitions of the structures used in the various hints
17 databases are also kept in this file, which is used by the maintenance
18 utilities as well as the main Exim binary. */
23 /* ************************* tdb interface ************************ */
28 # define EXIM_DB TDB_CONTEXT
30 /* Cursor type: tdb uses the previous "key" in _nextkey() (really it wants
31 tdb_traverse to be called) */
32 # define EXIM_CURSOR TDB_DATA
34 /* The datum type used for queries */
35 # define EXIM_DATUM TDB_DATA
37 /* Some text for messages */
38 # define EXIM_DBTYPE "tdb"
40 /* Access functions */
42 /* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed */
43 # define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \
44 *(dbpp) = tdb_open(CS name, 0, TDB_DEFAULT, flags, mode)
46 /* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */
47 # define EXIM_DBGET(db, key, data) \
48 (data = tdb_fetch(db, key), data.dptr != NULL)
50 /* EXIM_DBPUT - returns nothing useful, assumes replace mode */
51 # define EXIM_DBPUT(db, key, data) \
52 tdb_store(db, key, data, TDB_REPLACE)
54 /* EXIM_DBPUTB - non-overwriting for use by dbmbuild */
55 # define EXIM_DBPUTB(db, key, data) \
56 tdb_store(db, key, data, TDB_INSERT)
58 /* Returns from EXIM_DBPUTB */
60 # define EXIM_DBPUTB_OK 0
61 # define EXIM_DBPUTB_DUP (-1)
64 # define EXIM_DBDEL(db, key) tdb_delete(db, key)
66 /* EXIM_DBCREATE_CURSOR - initialize for scanning operation */
67 # define EXIM_DBCREATE_CURSOR(db, cursor) { \
68 *(cursor) = store_malloc(sizeof(TDB_DATA)); (*(cursor))->dptr = NULL; }
70 /* EXIM_DBSCAN - This is complicated because we have to free the last datum
71 free() must not die when passed NULL */
72 # define EXIM_DBSCAN(db, key, data, first, cursor) \
73 (key = (first ? tdb_firstkey(db) : tdb_nextkey(db, *(cursor))), \
74 free((cursor)->dptr), *(cursor) = key, \
77 /* EXIM_DBDELETE_CURSOR - terminate scanning operation. */
78 # define EXIM_DBDELETE_CURSOR(cursor) store_free(cursor)
81 # define EXIM_DBCLOSE__(db) tdb_close(db)
83 /* Datum access types - these are intended to be assignable */
85 # define EXIM_DATUM_SIZE(datum) (datum).dsize
86 # define EXIM_DATUM_DATA(datum) (datum).dptr
88 /* Free the stuff inside the datum. */
90 # define EXIM_DATUM_FREE(datum) (free((datum).dptr), (datum).dptr = NULL)
92 /* No initialization is needed. */
94 # define EXIM_DATUM_INIT(datum)
98 # define EXIM_DB_RLIMIT 150
105 /********************* Berkeley db native definitions **********************/
112 /* We can distinguish between versions 1.x and 2.x/3.x by looking for a
113 definition of DB_VERSION_STRING, which is present in versions 2.x onwards. */
115 # ifdef DB_VERSION_STRING
117 # if DB_VERSION_MAJOR >= 6
118 # error Version 6 and later BDB API is not supported
121 /* The API changed (again!) between the 2.x and 3.x versions */
123 # if DB_VERSION_MAJOR >= 3
125 /***************** Berkeley db 3.x/4.x native definitions ******************/
128 # if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
129 # define EXIM_DB DB_ENV
130 /* Cursor type, for scanning */
131 # define EXIM_CURSOR DBC
133 /* The datum type used for queries */
134 # define EXIM_DATUM DBT
136 /* Some text for messages */
137 # define EXIM_DBTYPE "db (v4.1+)"
139 /* Only more-recent versions. 5+ ? */
140 # ifndef DB_FORCESYNC
141 # define DB_FORCESYNC 0
145 /* Access functions */
147 /* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed. The
148 API changed for DB 4.1. - and we also starting using the "env" with a
149 specified working dir, to avoid the DBCONFIG file trap. */
151 # define ENV_TO_DB(env) ((DB *)((env)->app_private))
153 # define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \
154 if ( db_env_create(dbpp, 0) != 0 \
155 || ((*dbpp)->set_errcall(*dbpp, dbfn_bdb_error_callback), 0) \
156 || (*dbpp)->open(*dbpp, CS dirname, DB_CREATE|DB_INIT_MPOOL|DB_PRIVATE, 0) != 0\
159 else if (db_create((DB **) &((*dbpp)->app_private), *dbpp, 0) != 0) \
161 ((DB_ENV *)(*dbpp))->close((DB_ENV *)(*dbpp), 0); \
164 else if (ENV_TO_DB(*dbpp)->open(ENV_TO_DB(*dbpp), NULL, CS name, NULL, \
165 (flags) == O_RDONLY ? DB_UNKNOWN : DB_HASH, \
166 (flags) == O_RDONLY ? DB_RDONLY : DB_CREATE, \
170 ENV_TO_DB(*dbpp)->close(ENV_TO_DB(*dbpp), 0); \
171 ((DB_ENV *)(*dbpp))->close((DB_ENV *)(*dbpp), 0); \
175 /* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */
176 # define EXIM_DBGET(db, key, data) \
177 (ENV_TO_DB(db)->get(ENV_TO_DB(db), NULL, &key, &data, 0) == 0)
179 /* EXIM_DBPUT - returns nothing useful, assumes replace mode */
180 # define EXIM_DBPUT(db, key, data) \
181 ENV_TO_DB(db)->put(ENV_TO_DB(db), NULL, &key, &data, 0)
183 /* EXIM_DBPUTB - non-overwriting for use by dbmbuild */
184 # define EXIM_DBPUTB(db, key, data) \
185 ENV_TO_DB(db)->put(ENV_TO_DB(db), NULL, &key, &data, DB_NOOVERWRITE)
187 /* Return values from EXIM_DBPUTB */
189 # define EXIM_DBPUTB_OK 0
190 # define EXIM_DBPUTB_DUP DB_KEYEXIST
193 # define EXIM_DBDEL(db, key) ENV_TO_DB(db)->del(ENV_TO_DB(db), NULL, &key, 0)
195 /* EXIM_DBCREATE_CURSOR - initialize for scanning operation */
197 # define EXIM_DBCREATE_CURSOR(db, cursor) \
198 ENV_TO_DB(db)->cursor(ENV_TO_DB(db), NULL, cursor, 0)
200 /* EXIM_DBSCAN - returns TRUE if data is returned, FALSE at end */
201 # define EXIM_DBSCAN(db, key, data, first, cursor) \
202 ((cursor)->c_get(cursor, &key, &data, \
203 (first? DB_FIRST : DB_NEXT)) == 0)
205 /* EXIM_DBDELETE_CURSOR - terminate scanning operation */
206 # define EXIM_DBDELETE_CURSOR(cursor) \
207 (cursor)->c_close(cursor)
210 # define EXIM_DBCLOSE__(db) \
211 (ENV_TO_DB(db)->close(ENV_TO_DB(db), 0) , ((DB_ENV *)(db))->close((DB_ENV *)(db), DB_FORCESYNC))
213 /* Datum access types - these are intended to be assignable. */
215 # define EXIM_DATUM_SIZE(datum) (datum).size
216 # define EXIM_DATUM_DATA(datum) (datum).data
218 /* The whole datum structure contains other fields that must be cleared
219 before use, but we don't have to free anything after reading data. */
221 # define EXIM_DATUM_INIT(datum) memset(&datum, 0, sizeof(datum))
222 # define EXIM_DATUM_FREE(datum)
224 # else /* pre- 4.1 */
228 /* Cursor type, for scanning */
229 # define EXIM_CURSOR DBC
231 /* The datum type used for queries */
232 # define EXIM_DATUM DBT
234 /* Some text for messages */
235 # define EXIM_DBTYPE "db (v3/4)"
237 /* Access functions */
239 /* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed. */
241 # define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \
242 if (db_create(dbpp, NULL, 0) != 0 || \
243 ((*dbpp)->set_errcall(*dbpp, dbfn_bdb_error_callback), \
244 ((*dbpp)->open)(*dbpp, CS name, NULL, \
245 ((flags) == O_RDONLY)? DB_UNKNOWN : DB_HASH, \
246 ((flags) == O_RDONLY)? DB_RDONLY : DB_CREATE, \
247 mode)) != 0) *(dbpp) = NULL
249 /* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */
250 # define EXIM_DBGET(db, key, data) \
251 ((db)->get(db, NULL, &key, &data, 0) == 0)
253 /* EXIM_DBPUT - returns nothing useful, assumes replace mode */
254 # define EXIM_DBPUT(db, key, data) \
255 (db)->put(db, NULL, &key, &data, 0)
257 /* EXIM_DBPUTB - non-overwriting for use by dbmbuild */
258 # define EXIM_DBPUTB(db, key, data) \
259 (db)->put(db, NULL, &key, &data, DB_NOOVERWRITE)
261 /* Return values from EXIM_DBPUTB */
263 # define EXIM_DBPUTB_OK 0
264 # define EXIM_DBPUTB_DUP DB_KEYEXIST
267 # define EXIM_DBDEL(db, key) (db)->del(db, NULL, &key, 0)
269 /* EXIM_DBCREATE_CURSOR - initialize for scanning operation */
271 # define EXIM_DBCREATE_CURSOR(db, cursor) \
272 (db)->cursor(db, NULL, cursor, 0)
274 /* EXIM_DBSCAN - returns TRUE if data is returned, FALSE at end */
275 # define EXIM_DBSCAN(db, key, data, first, cursor) \
276 ((cursor)->c_get(cursor, &key, &data, \
277 (first? DB_FIRST : DB_NEXT)) == 0)
279 /* EXIM_DBDELETE_CURSOR - terminate scanning operation */
280 # define EXIM_DBDELETE_CURSOR(cursor) \
281 (cursor)->c_close(cursor)
284 # define EXIM_DBCLOSE__(db) (db)->close(db, 0)
286 /* Datum access types - these are intended to be assignable. */
288 # define EXIM_DATUM_SIZE(datum) (datum).size
289 # define EXIM_DATUM_DATA(datum) (datum).data
291 /* The whole datum structure contains other fields that must be cleared
292 before use, but we don't have to free anything after reading data. */
294 # define EXIM_DATUM_INIT(datum) memset(&datum, 0, sizeof(datum))
295 # define EXIM_DATUM_FREE(datum)
300 # else /* DB_VERSION_MAJOR >= 3 */
302 /******************* Berkeley db 2.x native definitions ********************/
307 /* Cursor type, for scanning */
308 # define EXIM_CURSOR DBC
310 /* The datum type used for queries */
311 # define EXIM_DATUM DBT
313 /* Some text for messages */
314 # define EXIM_DBTYPE "db (v2)"
316 /* Access functions */
318 /* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed */
319 # define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \
320 if ((errno = db_open(CS name, DB_HASH, \
321 ((flags) == O_RDONLY)? DB_RDONLY : DB_CREATE, \
322 mode, NULL, NULL, dbpp)) != 0) *(dbpp) = NULL
324 /* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */
325 # define EXIM_DBGET(db, key, data) \
326 ((db)->get(db, NULL, &key, &data, 0) == 0)
328 /* EXIM_DBPUT - returns nothing useful, assumes replace mode */
329 # define EXIM_DBPUT(db, key, data) \
330 (db)->put(db, NULL, &key, &data, 0)
332 /* EXIM_DBPUTB - non-overwriting for use by dbmbuild */
333 # define EXIM_DBPUTB(db, key, data) \
334 (db)->put(db, NULL, &key, &data, DB_NOOVERWRITE)
336 /* Return values from EXIM_DBPUTB */
338 # define EXIM_DBPUTB_OK 0
339 # define EXIM_DBPUTB_DUP DB_KEYEXIST
342 # define EXIM_DBDEL(db, key) (db)->del(db, NULL, &key, 0)
344 /* EXIM_DBCREATE_CURSOR - initialize for scanning operation */
346 /* The API of this function was changed between releases 2.4.14 and 2.7.3. I do
347 not know exactly where the change happened, but the Change Log for 2.5.9 lists
348 the new option that is available, so I guess that it happened at 2.5.x. */
350 # if DB_VERSION_MINOR >= 5
351 # define EXIM_DBCREATE_CURSOR(db, cursor) \
352 (db)->cursor(db, NULL, cursor, 0)
354 # define EXIM_DBCREATE_CURSOR(db, cursor) \
355 (db)->cursor(db, NULL, cursor)
358 /* EXIM_DBSCAN - returns TRUE if data is returned, FALSE at end */
359 # define EXIM_DBSCAN(db, key, data, first, cursor) \
360 ((cursor)->c_get(cursor, &key, &data, \
361 (first? DB_FIRST : DB_NEXT)) == 0)
363 /* EXIM_DBDELETE_CURSOR - terminate scanning operation */
364 # define EXIM_DBDELETE_CURSOR(cursor) \
365 (cursor)->c_close(cursor)
368 # define EXIM_DBCLOSE__(db) (db)->close(db, 0)
370 /* Datum access types - these are intended to be assignable. */
372 # define EXIM_DATUM_SIZE(datum) (datum).size
373 # define EXIM_DATUM_DATA(datum) (datum).data
375 /* The whole datum structure contains other fields that must be cleared
376 before use, but we don't have to free anything after reading data. */
378 # define EXIM_DATUM_INIT(datum) memset(&datum, 0, sizeof(datum))
379 # define EXIM_DATUM_FREE(datum)
381 # endif /* DB_VERSION_MAJOR >= 3 */
384 /* If DB_VERSION_TYPE is not defined, we have version 1.x */
386 # else /* DB_VERSION_TYPE */
388 /******************* Berkeley db 1.x native definitions ********************/
393 /* Cursor type, not used with DB 1.x: just set up a dummy */
394 # define EXIM_CURSOR int
396 /* The datum type used for queries */
397 # define EXIM_DATUM DBT
399 /* Some text for messages */
400 # define EXIM_DBTYPE "db (v1)"
402 /* When scanning, for the non-first case we historically just passed 0
403 as the flags field and it worked. On FreeBSD 8 it no longer works and
404 instead leads to memory exhaustion. The man-page on FreeBSD says to use
405 R_NEXT, but this 1.x is a historical fallback and I've no idea how portable
406 the use of that flag is; so the solution is to define R_NEXT here if it's not
407 already defined, with a default value of 0 because that's what we've always
408 before been able to pass successfully. */
413 /* Access functions */
415 /* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed */
416 # define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \
417 *(dbpp) = dbopen(CS name, flags, mode, DB_HASH, NULL)
419 /* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */
420 # define EXIM_DBGET(db, key, data) \
421 ((db)->get(db, &key, &data, 0) == 0)
423 /* EXIM_DBPUT - returns nothing useful, assumes replace mode */
424 # define EXIM_DBPUT(db, key, data) \
425 (db)->put(db, &key, &data, 0)
427 /* EXIM_DBPUTB - non-overwriting for use by dbmbuild */
428 # define EXIM_DBPUTB(db, key, data) \
429 (db)->put(db, &key, &data, R_NOOVERWRITE)
431 /* Returns from EXIM_DBPUTB */
433 # define EXIM_DBPUTB_OK 0
434 # define EXIM_DBPUTB_DUP 1
437 # define EXIM_DBDEL(db, key) (db)->del(db, &key, 0)
439 /* EXIM_DBCREATE_CURSOR - initialize for scanning operation (null) */
440 # define EXIM_DBCREATE_CURSOR(db, cursor) {}
442 /* EXIM_DBSCAN - returns TRUE if data is returned, FALSE at end */
443 # define EXIM_DBSCAN(db, key, data, first, cursor) \
444 ((db)->seq(db, &key, &data, (first? R_FIRST : R_NEXT)) == 0)
446 /* EXIM_DBDELETE_CURSOR - terminate scanning operation (null). */
447 # define EXIM_DBDELETE_CURSOR(cursor) { }
450 # define EXIM_DBCLOSE__(db) (db)->close(db)
452 /* Datum access types - these are intended to be assignable */
454 # define EXIM_DATUM_SIZE(datum) (datum).size
455 # define EXIM_DATUM_DATA(datum) (datum).data
457 /* There's no clearing required before use, and we don't have to free anything
458 after reading data. */
460 # define EXIM_DATUM_INIT(datum)
461 # define EXIM_DATUM_FREE(datum)
463 # endif /* DB_VERSION_STRING */
466 /* all BDB versions */
469 # define EXIM_DB_RLIMIT 150
476 /********************* gdbm interface definitions **********************/
478 #elif defined USE_GDBM
484 GDBM_FILE gdbm; /* Database */
485 datum lkey; /* Last key, for scans */
488 /* Cursor type, not used with gdbm: just set up a dummy */
489 # define EXIM_CURSOR int
491 /* The datum type used for queries */
492 # define EXIM_DATUM datum
494 /* Some text for messages */
496 # define EXIM_DBTYPE "gdbm"
498 /* Access functions */
500 /* EXIM_DBOPEN - returns a EXIM_DB *, NULL if failed */
501 # define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \
502 { (*(dbpp)) = (EXIM_DB *) malloc(sizeof(EXIM_DB));\
503 if (*(dbpp) != NULL) { \
504 (*(dbpp))->lkey.dptr = NULL;\
505 (*(dbpp))->gdbm = gdbm_open(CS name, 0, (((flags) & O_CREAT))?GDBM_WRCREAT:(((flags) & (O_RDWR|O_WRONLY))?GDBM_WRITER:GDBM_READER), mode, 0);\
506 if ((*(dbpp))->gdbm == NULL) {\
513 /* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */
514 # define EXIM_DBGET(db, key, data) \
515 (data = gdbm_fetch(db->gdbm, key), data.dptr != NULL)
517 /* EXIM_DBPUT - returns nothing useful, assumes replace mode */
518 # define EXIM_DBPUT(db, key, data) \
519 gdbm_store(db->gdbm, key, data, GDBM_REPLACE)
521 /* EXIM_DBPUTB - non-overwriting for use by dbmbuild */
522 # define EXIM_DBPUTB(db, key, data) \
523 gdbm_store(db->gdbm, key, data, GDBM_INSERT)
525 /* Returns from EXIM_DBPUTB */
527 # define EXIM_DBPUTB_OK 0
528 # define EXIM_DBPUTB_DUP 1
531 # define EXIM_DBDEL(db, key) gdbm_delete(db->gdbm, key)
533 /* EXIM_DBCREATE_CURSOR - initialize for scanning operation (null) */
534 # define EXIM_DBCREATE_CURSOR(db, cursor) {}
537 # define EXIM_DBSCAN(db, key, data, first, cursor) \
538 ( key = ((first)? gdbm_firstkey(db->gdbm) : gdbm_nextkey(db->gdbm, db->lkey)), \
539 (((db)->lkey.dptr != NULL)? (free((db)->lkey.dptr),1) : 1),\
540 db->lkey = key, key.dptr != NULL)
542 /* EXIM_DBDELETE_CURSOR - terminate scanning operation (null). */
543 # define EXIM_DBDELETE_CURSOR(cursor) { }
546 # define EXIM_DBCLOSE__(db) \
547 { gdbm_close((db)->gdbm);\
548 if ((db)->lkey.dptr != NULL) free((db)->lkey.dptr);\
551 /* Datum access types - these are intended to be assignable */
553 # define EXIM_DATUM_SIZE(datum) (datum).dsize
554 # define EXIM_DATUM_DATA(datum) (datum).dptr
556 /* There's no clearing required before use, but we have to free the dptr
557 after reading data. */
559 # define EXIM_DATUM_INIT(datum)
560 # define EXIM_DATUM_FREE(datum) free(datum.dptr)
564 # define EXIM_DB_RLIMIT 150
573 /* If none of USE_DB, USG_GDBM, or USE_TDB are set, the default is the NDBM
577 /********************* ndbm interface definitions **********************/
584 /* Cursor type, not used with ndbm: just set up a dummy */
585 # define EXIM_CURSOR int
587 /* The datum type used for queries */
588 # define EXIM_DATUM datum
590 /* Some text for messages */
592 # define EXIM_DBTYPE "ndbm"
594 /* Access functions */
596 /* EXIM_DBOPEN - returns a EXIM_DB *, NULL if failed */
597 # define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \
598 *(dbpp) = dbm_open(CS name, flags, mode)
600 /* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */
601 # define EXIM_DBGET(db, key, data) \
602 (data = dbm_fetch(db, key), data.dptr != NULL)
604 /* EXIM_DBPUT - returns nothing useful, assumes replace mode */
605 # define EXIM_DBPUT(db, key, data) \
606 dbm_store(db, key, data, DBM_REPLACE)
608 /* EXIM_DBPUTB - non-overwriting for use by dbmbuild */
609 # define EXIM_DBPUTB(db, key, data) \
610 dbm_store(db, key, data, DBM_INSERT)
612 /* Returns from EXIM_DBPUTB */
614 # define EXIM_DBPUTB_OK 0
615 # define EXIM_DBPUTB_DUP 1
618 # define EXIM_DBDEL(db, key) dbm_delete(db, key)
620 /* EXIM_DBCREATE_CURSOR - initialize for scanning operation (null) */
621 # define EXIM_DBCREATE_CURSOR(db, cursor) {}
624 # define EXIM_DBSCAN(db, key, data, first, cursor) \
625 (key = (first? dbm_firstkey(db) : dbm_nextkey(db)), key.dptr != NULL)
627 /* EXIM_DBDELETE_CURSOR - terminate scanning operation (null). */
628 # define EXIM_DBDELETE_CURSOR(cursor) { }
631 # define EXIM_DBCLOSE__(db) dbm_close(db)
633 /* Datum access types - these are intended to be assignable */
635 # define EXIM_DATUM_SIZE(datum) (datum).dsize
636 # define EXIM_DATUM_DATA(datum) (datum).dptr
638 /* There's no clearing required before use, and we don't have to free anything
639 after reading data. */
641 # define EXIM_DATUM_INIT(datum)
642 # define EXIM_DATUM_FREE(datum)
646 # define EXIM_DB_RLIMIT 150
648 #endif /* USE_GDBM */
654 #ifdef COMPILE_UTILITY
656 # define EXIM_DBOPEN(name, dirname, flags, mode, dbpp) \
657 EXIM_DBOPEN__(name, dirname, flags, mode, dbpp)
658 # define EXIM_DBCLOSE(db) EXIM_DBCLOSE__(db)
662 # define EXIM_DBOPEN(name, dirname, flags, mode, dbpp) \
664 DEBUG(D_hints_lookup) \
665 debug_printf_indent("EXIM_DBOPEN: file <%s> dir <%s> flags=%s\n", \
667 (flags) == O_RDONLY ? "O_RDONLY" \
668 : (flags) == O_RDWR ? "O_RDWR" \
669 : (flags) == (O_RDWR|O_CREAT) ? "O_RDWR|O_CREAT" \
671 if (is_tainted2(name, LOG_MAIN|LOG_PANIC, "Tainted name '%s' for DB file not permitted", name) \
672 || is_tainted2(dirname, LOG_MAIN|LOG_PANIC, "Tainted name '%s' for DB directory not permitted", dirname)) \
675 { EXIM_DBOPEN__(name, dirname, flags, mode, dbpp); } \
676 DEBUG(D_hints_lookup) debug_printf_indent("returned from EXIM_DBOPEN: %p\n", *dbpp); \
678 # define EXIM_DBCLOSE(db) \
680 DEBUG(D_hints_lookup) debug_printf_indent("EXIM_DBCLOSE(%p)\n", db); \
681 EXIM_DBCLOSE__(db); \
686 /********************* End of dbm library definitions **********************/
689 /* Structure for carrying around an open DBM file, and an open locking file
690 that relates to it. */
698 /* Structures for records stored in exim database dbm files. They all
699 start with the same fields, described in the generic type. */
703 time_t time_stamp; /* Timestamp of writing */
707 /* This structure keeps track of retry information for a host or a local
713 time_t first_failed; /* Time of first failure */
714 time_t last_try; /* Time of last try */
715 time_t next_try; /* Time of next try */
716 BOOL expired; /* Retry time has expired */
717 int basic_errno; /* Errno of last failure */
718 int more_errno; /* Additional information */
719 uschar text[1]; /* Text message for last failure */
722 /* These structures keep track of addresses that have had callout verification
723 performed on them. There are two groups of records:
725 1. keyed by localpart@domain -
726 Full address was tested and record holds result
729 Domain response upto MAIL FROM:<>, postmaster, random local part;
731 If a record exists, the result field is either ccache_accept or ccache_reject,
732 or, for a domain record only, ccache_reject_mfnull when MAIL FROM:<> was
733 rejected. The other fields, however, (which are only relevant to domain
734 records) may also contain ccache_unknown if that particular test has not been
737 Originally, there was only one structure, used for both types. However, it got
738 expanded for domain records, so it got split. To make it possible for Exim to
739 handle the old type of record, we retain the old definition. The different
740 kinds of record can be distinguished by their different lengths. */
746 int postmaster_result; /* Postmaster is accepted */
747 int random_result; /* Random local part was accepted */
748 } dbdata_callout_cache_obs;
751 time_t time_stamp; /* Timestamp of last address check */
753 int result; /* accept or reject */
754 } dbdata_callout_cache_address;
756 /* For this new layout, we put the additional fields (the timestamps)
757 last so that if somebody reverts to an older Exim, the new records will
758 still make sense because they match the old layout. */
761 time_t time_stamp; /* Time stamp of last connection */
763 int result; /* Domain reject or accept */
764 int postmaster_result; /* Postmaster result */
765 int random_result; /* Random result */
766 time_t postmaster_stamp; /* Timestamp of postmaster check */
767 time_t random_stamp; /* Timestamp of random check */
768 } dbdata_callout_cache;
770 /* This structure keeps track of messages that are waiting for a particular
771 host for a particular transport. */
776 int count; /* Count of message ids */
777 int sequence; /* Sequence for continued records */
778 uschar text[1]; /* One long character string */
782 /* The contents of the "misc" database are a mixture of different kinds of
783 record, as defined below. The keys used for a specific type all start with a
784 given string such as "etrn-" or "host-serialize-". */
787 /* This structure records a connection to a particular host, for the
788 purpose of serializing access to certain hosts. For possible future extension,
789 a field is defined for holding the count of connections, but it is not
790 at present in use. The same structure is used for recording a running ETRN
796 int count; /* Reserved for possible connection count */
800 /* This structure records the information required for the ratelimit
806 int time_usec; /* Fractional part of time, from gettimeofday() */
807 double rate; /* Smoothed sending rate at that time */
810 /* Same as above, plus a Bloom filter for uniquifying events. */
813 dbdata_ratelimit dbd;
814 time_t bloom_epoch; /* When the Bloom filter was last reset */
815 unsigned bloom_size; /* Number of bytes in the Bloom filter */
816 uschar bloom[40]; /* Bloom filter which may be larger than this */
817 } dbdata_ratelimit_unique;
820 /* For "seen" ACL condition */
825 #ifndef DISABLE_PIPE_CONNECT
826 /* This structure records the EHLO responses, cleartext and crypted,
827 for an IP, as bitmasks (cf. OPTION_TLS). For LIMITS, also values
828 advertised for MAILMAX, RCPTMAX and RCPTDOMAINMAX; zero meaning no
832 unsigned short cleartext_features;
833 unsigned short crypted_features;
834 unsigned short cleartext_auths;
835 unsigned short crypted_auths;
837 # ifdef EXPERIMENTAL_ESMTP_LIMITS
838 unsigned int limit_mail;
839 unsigned int limit_rcpt;
840 unsigned int limit_rcptdom;
847 ehlo_resp_precis data;
854 uschar verify_override:1;
857 } dbdata_tls_session;
860 /* End of dbstuff.h */