1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 */
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) 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 /********************* Berkeley db native definitions **********************/
105 /* We can distinguish between versions 1.x and 2.x/3.x by looking for a
106 definition of DB_VERSION_STRING, which is present in versions 2.x onwards. */
108 #ifdef DB_VERSION_STRING
110 # if DB_VERSION_MAJOR >= 6
111 # error Version 6 and later BDB API is not supported
114 /* The API changed (again!) between the 2.x and 3.x versions */
116 #if DB_VERSION_MAJOR >= 3
118 /***************** Berkeley db 3.x/4.x native definitions ******************/
121 # if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
122 # define EXIM_DB DB_ENV
123 /* Cursor type, for scanning */
124 # define EXIM_CURSOR DBC
126 /* The datum type used for queries */
127 # define EXIM_DATUM DBT
129 /* Some text for messages */
130 # define EXIM_DBTYPE "db (v4.1+)"
132 /* Only more-recent versions. 5+ ? */
133 # ifndef DB_FORCESYNC
134 # define DB_FORCESYNC 0
138 /* Access functions */
140 /* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed. The
141 API changed for DB 4.1. - and we also starting using the "env" with a
142 specified working dir, to avoid the DBCONFIG file trap. */
144 # define ENV_TO_DB(env) ((DB *)((env)->app_private))
146 # define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \
147 if ( db_env_create(dbpp, 0) != 0 \
148 || ((*dbpp)->set_errcall(*dbpp, dbfn_bdb_error_callback), 0) \
149 || (*dbpp)->open(*dbpp, CS dirname, DB_CREATE|DB_INIT_MPOOL|DB_PRIVATE, 0) != 0\
152 else if (db_create((DB **) &((*dbpp)->app_private), *dbpp, 0) != 0) \
154 ((DB_ENV *)(*dbpp))->close((DB_ENV *)(*dbpp), 0); \
157 else if (ENV_TO_DB(*dbpp)->open(ENV_TO_DB(*dbpp), NULL, CS name, NULL, \
158 (flags) == O_RDONLY ? DB_UNKNOWN : DB_HASH, \
159 (flags) == O_RDONLY ? DB_RDONLY : DB_CREATE, \
163 ENV_TO_DB(*dbpp)->close(ENV_TO_DB(*dbpp), 0); \
164 ((DB_ENV *)(*dbpp))->close((DB_ENV *)(*dbpp), 0); \
168 /* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */
169 # define EXIM_DBGET(db, key, data) \
170 (ENV_TO_DB(db)->get(ENV_TO_DB(db), NULL, &key, &data, 0) == 0)
172 /* EXIM_DBPUT - returns nothing useful, assumes replace mode */
173 # define EXIM_DBPUT(db, key, data) \
174 ENV_TO_DB(db)->put(ENV_TO_DB(db), NULL, &key, &data, 0)
176 /* EXIM_DBPUTB - non-overwriting for use by dbmbuild */
177 # define EXIM_DBPUTB(db, key, data) \
178 ENV_TO_DB(db)->put(ENV_TO_DB(db), NULL, &key, &data, DB_NOOVERWRITE)
180 /* Return values from EXIM_DBPUTB */
182 # define EXIM_DBPUTB_OK 0
183 # define EXIM_DBPUTB_DUP DB_KEYEXIST
186 # define EXIM_DBDEL(db, key) ENV_TO_DB(db)->del(ENV_TO_DB(db), NULL, &key, 0)
188 /* EXIM_DBCREATE_CURSOR - initialize for scanning operation */
190 # define EXIM_DBCREATE_CURSOR(db, cursor) \
191 ENV_TO_DB(db)->cursor(ENV_TO_DB(db), NULL, cursor, 0)
193 /* EXIM_DBSCAN - returns TRUE if data is returned, FALSE at end */
194 # define EXIM_DBSCAN(db, key, data, first, cursor) \
195 ((cursor)->c_get(cursor, &key, &data, \
196 (first? DB_FIRST : DB_NEXT)) == 0)
198 /* EXIM_DBDELETE_CURSOR - terminate scanning operation */
199 # define EXIM_DBDELETE_CURSOR(cursor) \
200 (cursor)->c_close(cursor)
203 # define EXIM_DBCLOSE__(db) \
204 (ENV_TO_DB(db)->close(ENV_TO_DB(db), 0) , ((DB_ENV *)(db))->close((DB_ENV *)(db), DB_FORCESYNC))
206 /* Datum access types - these are intended to be assignable. */
208 # define EXIM_DATUM_SIZE(datum) (datum).size
209 # define EXIM_DATUM_DATA(datum) (datum).data
211 /* The whole datum structure contains other fields that must be cleared
212 before use, but we don't have to free anything after reading data. */
214 # define EXIM_DATUM_INIT(datum) memset(&datum, 0, sizeof(datum))
215 # define EXIM_DATUM_FREE(datum)
217 # else /* pre- 4.1 */
221 /* Cursor type, for scanning */
222 # define EXIM_CURSOR DBC
224 /* The datum type used for queries */
225 # define EXIM_DATUM DBT
227 /* Some text for messages */
228 # define EXIM_DBTYPE "db (v3/4)"
230 /* Access functions */
232 /* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed. */
234 # define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \
235 if (db_create(dbpp, NULL, 0) != 0 || \
236 ((*dbpp)->set_errcall(*dbpp, dbfn_bdb_error_callback), \
237 ((*dbpp)->open)(*dbpp, CS name, NULL, \
238 ((flags) == O_RDONLY)? DB_UNKNOWN : DB_HASH, \
239 ((flags) == O_RDONLY)? DB_RDONLY : DB_CREATE, \
240 mode)) != 0) *(dbpp) = NULL
242 /* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */
243 # define EXIM_DBGET(db, key, data) \
244 ((db)->get(db, NULL, &key, &data, 0) == 0)
246 /* EXIM_DBPUT - returns nothing useful, assumes replace mode */
247 # define EXIM_DBPUT(db, key, data) \
248 (db)->put(db, NULL, &key, &data, 0)
250 /* EXIM_DBPUTB - non-overwriting for use by dbmbuild */
251 # define EXIM_DBPUTB(db, key, data) \
252 (db)->put(db, NULL, &key, &data, DB_NOOVERWRITE)
254 /* Return values from EXIM_DBPUTB */
256 # define EXIM_DBPUTB_OK 0
257 # define EXIM_DBPUTB_DUP DB_KEYEXIST
260 # define EXIM_DBDEL(db, key) (db)->del(db, NULL, &key, 0)
262 /* EXIM_DBCREATE_CURSOR - initialize for scanning operation */
264 # define EXIM_DBCREATE_CURSOR(db, cursor) \
265 (db)->cursor(db, NULL, cursor, 0)
267 /* EXIM_DBSCAN - returns TRUE if data is returned, FALSE at end */
268 # define EXIM_DBSCAN(db, key, data, first, cursor) \
269 ((cursor)->c_get(cursor, &key, &data, \
270 (first? DB_FIRST : DB_NEXT)) == 0)
272 /* EXIM_DBDELETE_CURSOR - terminate scanning operation */
273 # define EXIM_DBDELETE_CURSOR(cursor) \
274 (cursor)->c_close(cursor)
277 # define EXIM_DBCLOSE__(db) (db)->close(db, 0)
279 /* Datum access types - these are intended to be assignable. */
281 # define EXIM_DATUM_SIZE(datum) (datum).size
282 # define EXIM_DATUM_DATA(datum) (datum).data
284 /* The whole datum structure contains other fields that must be cleared
285 before use, but we don't have to free anything after reading data. */
287 # define EXIM_DATUM_INIT(datum) memset(&datum, 0, sizeof(datum))
288 # define EXIM_DATUM_FREE(datum)
293 #else /* DB_VERSION_MAJOR >= 3 */
295 /******************* Berkeley db 2.x native definitions ********************/
300 /* Cursor type, for scanning */
301 #define EXIM_CURSOR DBC
303 /* The datum type used for queries */
304 #define EXIM_DATUM DBT
306 /* Some text for messages */
307 #define EXIM_DBTYPE "db (v2)"
309 /* Access functions */
311 /* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed */
312 #define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \
313 if ((errno = db_open(CS name, DB_HASH, \
314 ((flags) == O_RDONLY)? DB_RDONLY : DB_CREATE, \
315 mode, NULL, NULL, dbpp)) != 0) *(dbpp) = NULL
317 /* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */
318 #define EXIM_DBGET(db, key, data) \
319 ((db)->get(db, NULL, &key, &data, 0) == 0)
321 /* EXIM_DBPUT - returns nothing useful, assumes replace mode */
322 #define EXIM_DBPUT(db, key, data) \
323 (db)->put(db, NULL, &key, &data, 0)
325 /* EXIM_DBPUTB - non-overwriting for use by dbmbuild */
326 #define EXIM_DBPUTB(db, key, data) \
327 (db)->put(db, NULL, &key, &data, DB_NOOVERWRITE)
329 /* Return values from EXIM_DBPUTB */
331 #define EXIM_DBPUTB_OK 0
332 #define EXIM_DBPUTB_DUP DB_KEYEXIST
335 #define EXIM_DBDEL(db, key) (db)->del(db, NULL, &key, 0)
337 /* EXIM_DBCREATE_CURSOR - initialize for scanning operation */
339 /* The API of this function was changed between releases 2.4.14 and 2.7.3. I do
340 not know exactly where the change happened, but the Change Log for 2.5.9 lists
341 the new option that is available, so I guess that it happened at 2.5.x. */
343 #if DB_VERSION_MINOR >= 5
344 #define EXIM_DBCREATE_CURSOR(db, cursor) \
345 (db)->cursor(db, NULL, cursor, 0)
347 #define EXIM_DBCREATE_CURSOR(db, cursor) \
348 (db)->cursor(db, NULL, cursor)
351 /* EXIM_DBSCAN - returns TRUE if data is returned, FALSE at end */
352 #define EXIM_DBSCAN(db, key, data, first, cursor) \
353 ((cursor)->c_get(cursor, &key, &data, \
354 (first? DB_FIRST : DB_NEXT)) == 0)
356 /* EXIM_DBDELETE_CURSOR - terminate scanning operation */
357 #define EXIM_DBDELETE_CURSOR(cursor) \
358 (cursor)->c_close(cursor)
361 #define EXIM_DBCLOSE__(db) (db)->close(db, 0)
363 /* Datum access types - these are intended to be assignable. */
365 #define EXIM_DATUM_SIZE(datum) (datum).size
366 #define EXIM_DATUM_DATA(datum) (datum).data
368 /* The whole datum structure contains other fields that must be cleared
369 before use, but we don't have to free anything after reading data. */
371 #define EXIM_DATUM_INIT(datum) memset(&datum, 0, sizeof(datum))
372 #define EXIM_DATUM_FREE(datum)
374 #endif /* DB_VERSION_MAJOR >= 3 */
377 /* If DB_VERSION_TYPE is not defined, we have version 1.x */
379 #else /* DB_VERSION_TYPE */
381 /******************* Berkeley db 1.x native definitions ********************/
386 /* Cursor type, not used with DB 1.x: just set up a dummy */
387 #define EXIM_CURSOR int
389 /* The datum type used for queries */
390 #define EXIM_DATUM DBT
392 /* Some text for messages */
393 #define EXIM_DBTYPE "db (v1)"
395 /* When scanning, for the non-first case we historically just passed 0
396 as the flags field and it worked. On FreeBSD 8 it no longer works and
397 instead leads to memory exhaustion. The man-page on FreeBSD says to use
398 R_NEXT, but this 1.x is a historical fallback and I've no idea how portable
399 the use of that flag is; so the solution is to define R_NEXT here if it's not
400 already defined, with a default value of 0 because that's what we've always
401 before been able to pass successfully. */
406 /* Access functions */
408 /* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed */
409 #define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \
410 *(dbpp) = dbopen(CS name, flags, mode, DB_HASH, NULL)
412 /* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */
413 #define EXIM_DBGET(db, key, data) \
414 ((db)->get(db, &key, &data, 0) == 0)
416 /* EXIM_DBPUT - returns nothing useful, assumes replace mode */
417 #define EXIM_DBPUT(db, key, data) \
418 (db)->put(db, &key, &data, 0)
420 /* EXIM_DBPUTB - non-overwriting for use by dbmbuild */
421 #define EXIM_DBPUTB(db, key, data) \
422 (db)->put(db, &key, &data, R_NOOVERWRITE)
424 /* Returns from EXIM_DBPUTB */
426 #define EXIM_DBPUTB_OK 0
427 #define EXIM_DBPUTB_DUP 1
430 #define EXIM_DBDEL(db, key) (db)->del(db, &key, 0)
432 /* EXIM_DBCREATE_CURSOR - initialize for scanning operation (null) */
433 #define EXIM_DBCREATE_CURSOR(db, cursor) {}
435 /* EXIM_DBSCAN - returns TRUE if data is returned, FALSE at end */
436 #define EXIM_DBSCAN(db, key, data, first, cursor) \
437 ((db)->seq(db, &key, &data, (first? R_FIRST : R_NEXT)) == 0)
439 /* EXIM_DBDELETE_CURSOR - terminate scanning operation (null). */
440 #define EXIM_DBDELETE_CURSOR(cursor) { }
443 #define EXIM_DBCLOSE__(db) (db)->close(db)
445 /* Datum access types - these are intended to be assignable */
447 #define EXIM_DATUM_SIZE(datum) (datum).size
448 #define EXIM_DATUM_DATA(datum) (datum).data
450 /* There's no clearing required before use, and we don't have to free anything
451 after reading data. */
453 #define EXIM_DATUM_INIT(datum)
454 #define EXIM_DATUM_FREE(datum)
456 #endif /* DB_VERSION_STRING */
460 /********************* gdbm interface definitions **********************/
462 #elif defined USE_GDBM
468 GDBM_FILE gdbm; /* Database */
469 datum lkey; /* Last key, for scans */
472 /* Cursor type, not used with gdbm: just set up a dummy */
473 #define EXIM_CURSOR int
475 /* The datum type used for queries */
476 #define EXIM_DATUM datum
478 /* Some text for messages */
480 #define EXIM_DBTYPE "gdbm"
482 /* Access functions */
484 /* EXIM_DBOPEN - returns a EXIM_DB *, NULL if failed */
485 #define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \
486 { (*(dbpp)) = (EXIM_DB *) malloc(sizeof(EXIM_DB));\
487 if (*(dbpp) != NULL) { \
488 (*(dbpp))->lkey.dptr = NULL;\
489 (*(dbpp))->gdbm = gdbm_open(CS name, 0, (((flags) & O_CREAT))?GDBM_WRCREAT:(((flags) & (O_RDWR|O_WRONLY))?GDBM_WRITER:GDBM_READER), mode, 0);\
490 if ((*(dbpp))->gdbm == NULL) {\
497 /* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */
498 #define EXIM_DBGET(db, key, data) \
499 (data = gdbm_fetch(db->gdbm, key), data.dptr != NULL)
501 /* EXIM_DBPUT - returns nothing useful, assumes replace mode */
502 #define EXIM_DBPUT(db, key, data) \
503 gdbm_store(db->gdbm, key, data, GDBM_REPLACE)
505 /* EXIM_DBPUTB - non-overwriting for use by dbmbuild */
506 #define EXIM_DBPUTB(db, key, data) \
507 gdbm_store(db->gdbm, key, data, GDBM_INSERT)
509 /* Returns from EXIM_DBPUTB */
511 #define EXIM_DBPUTB_OK 0
512 #define EXIM_DBPUTB_DUP 1
515 #define EXIM_DBDEL(db, key) gdbm_delete(db->gdbm, key)
517 /* EXIM_DBCREATE_CURSOR - initialize for scanning operation (null) */
518 #define EXIM_DBCREATE_CURSOR(db, cursor) {}
521 #define EXIM_DBSCAN(db, key, data, first, cursor) \
522 ( key = ((first)? gdbm_firstkey(db->gdbm) : gdbm_nextkey(db->gdbm, db->lkey)), \
523 (((db)->lkey.dptr != NULL)? (free((db)->lkey.dptr),1) : 1),\
524 db->lkey = key, key.dptr != NULL)
526 /* EXIM_DBDELETE_CURSOR - terminate scanning operation (null). */
527 #define EXIM_DBDELETE_CURSOR(cursor) { }
530 #define EXIM_DBCLOSE__(db) \
531 { gdbm_close((db)->gdbm);\
532 if ((db)->lkey.dptr != NULL) free((db)->lkey.dptr);\
535 /* Datum access types - these are intended to be assignable */
537 #define EXIM_DATUM_SIZE(datum) (datum).dsize
538 #define EXIM_DATUM_DATA(datum) (datum).dptr
540 /* There's no clearing required before use, but we have to free the dptr
541 after reading data. */
543 #define EXIM_DATUM_INIT(datum)
544 #define EXIM_DATUM_FREE(datum) free(datum.dptr)
549 /* If none of USE_DB, USG_GDBM, or USE_TDB are set, the default is the NDBM
553 /********************* ndbm interface definitions **********************/
560 /* Cursor type, not used with ndbm: just set up a dummy */
561 #define EXIM_CURSOR int
563 /* The datum type used for queries */
564 #define EXIM_DATUM datum
566 /* Some text for messages */
568 #define EXIM_DBTYPE "ndbm"
570 /* Access functions */
572 /* EXIM_DBOPEN - returns a EXIM_DB *, NULL if failed */
573 #define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \
574 *(dbpp) = dbm_open(CS name, flags, mode)
576 /* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */
577 #define EXIM_DBGET(db, key, data) \
578 (data = dbm_fetch(db, key), data.dptr != NULL)
580 /* EXIM_DBPUT - returns nothing useful, assumes replace mode */
581 #define EXIM_DBPUT(db, key, data) \
582 dbm_store(db, key, data, DBM_REPLACE)
584 /* EXIM_DBPUTB - non-overwriting for use by dbmbuild */
585 #define EXIM_DBPUTB(db, key, data) \
586 dbm_store(db, key, data, DBM_INSERT)
588 /* Returns from EXIM_DBPUTB */
590 #define EXIM_DBPUTB_OK 0
591 #define EXIM_DBPUTB_DUP 1
594 #define EXIM_DBDEL(db, key) dbm_delete(db, key)
596 /* EXIM_DBCREATE_CURSOR - initialize for scanning operation (null) */
597 #define EXIM_DBCREATE_CURSOR(db, cursor) {}
600 #define EXIM_DBSCAN(db, key, data, first, cursor) \
601 (key = (first? dbm_firstkey(db) : dbm_nextkey(db)), key.dptr != NULL)
603 /* EXIM_DBDELETE_CURSOR - terminate scanning operation (null). */
604 #define EXIM_DBDELETE_CURSOR(cursor) { }
607 #define EXIM_DBCLOSE__(db) dbm_close(db)
609 /* Datum access types - these are intended to be assignable */
611 #define EXIM_DATUM_SIZE(datum) (datum).dsize
612 #define EXIM_DATUM_DATA(datum) (datum).dptr
614 /* There's no clearing required before use, and we don't have to free anything
615 after reading data. */
617 #define EXIM_DATUM_INIT(datum)
618 #define EXIM_DATUM_FREE(datum)
620 #endif /* USE_GDBM */
626 # ifdef COMPILE_UTILITY
628 # define EXIM_DBOPEN(name, dirname, flags, mode, dbpp) \
629 EXIM_DBOPEN__(name, dirname, flags, mode, dbpp)
630 # define EXIM_DBCLOSE(db) EXIM_DBCLOSE__(db)
634 # define EXIM_DBOPEN(name, dirname, flags, mode, dbpp) \
636 DEBUG(D_hints_lookup) \
637 debug_printf_indent("EXIM_DBOPEN: file <%s> dir <%s> flags=%s\n", \
639 (flags) == O_RDONLY ? "O_RDONLY" \
640 : (flags) == O_RDWR ? "O_RDWR" \
641 : (flags) == (O_RDWR|O_CREAT) ? "O_RDWR|O_CREAT" \
643 if (is_tainted(name) || is_tainted(dirname)) \
645 log_write(0, LOG_MAIN|LOG_PANIC, "Tainted name for DB file not permitted"); \
649 { EXIM_DBOPEN__(name, dirname, flags, mode, dbpp); } \
650 DEBUG(D_hints_lookup) debug_printf_indent("returned from EXIM_DBOPEN: %p\n", *dbpp); \
652 # define EXIM_DBCLOSE(db) \
654 DEBUG(D_hints_lookup) debug_printf_indent("EXIM_DBCLOSE(%p)\n", db); \
655 EXIM_DBCLOSE__(db); \
660 /********************* End of dbm library definitions **********************/
663 /* Structure for carrying around an open DBM file, and an open locking file
664 that relates to it. */
672 /* Structures for records stored in exim database dbm files. They all
673 start with the same fields, described in the generic type. */
677 time_t time_stamp; /* Timestamp of writing */
681 /* This structure keeps track of retry information for a host or a local
687 time_t first_failed; /* Time of first failure */
688 time_t last_try; /* Time of last try */
689 time_t next_try; /* Time of next try */
690 BOOL expired; /* Retry time has expired */
691 int basic_errno; /* Errno of last failure */
692 int more_errno; /* Additional information */
693 uschar text[1]; /* Text message for last failure */
696 /* These structures keep track of addresses that have had callout verification
697 performed on them. There are two groups of records:
699 1. keyed by localpart@domain -
700 Full address was tested and record holds result
703 Domain response upto MAIL FROM:<>, postmaster, random local part;
705 If a record exists, the result field is either ccache_accept or ccache_reject,
706 or, for a domain record only, ccache_reject_mfnull when MAIL FROM:<> was
707 rejected. The other fields, however, (which are only relevant to domain
708 records) may also contain ccache_unknown if that particular test has not been
711 Originally, there was only one structure, used for both types. However, it got
712 expanded for domain records, so it got split. To make it possible for Exim to
713 handle the old type of record, we retain the old definition. The different
714 kinds of record can be distinguished by their different lengths. */
720 int postmaster_result; /* Postmaster is accepted */
721 int random_result; /* Random local part was accepted */
722 } dbdata_callout_cache_obs;
725 time_t time_stamp; /* Timestamp of last address check */
727 int result; /* accept or reject */
728 } dbdata_callout_cache_address;
730 /* For this new layout, we put the additional fields (the timestamps)
731 last so that if somebody reverts to an older Exim, the new records will
732 still make sense because they match the old layout. */
735 time_t time_stamp; /* Time stamp of last connection */
737 int result; /* Domain reject or accept */
738 int postmaster_result; /* Postmaster result */
739 int random_result; /* Random result */
740 time_t postmaster_stamp; /* Timestamp of postmaster check */
741 time_t random_stamp; /* Timestamp of random check */
742 } dbdata_callout_cache;
744 /* This structure keeps track of messages that are waiting for a particular
745 host for a particular transport. */
750 int count; /* Count of message ids */
751 int sequence; /* Sequence for continued records */
752 uschar text[1]; /* One long character string */
756 /* The contents of the "misc" database are a mixture of different kinds of
757 record, as defined below. The keys used for a specific type all start with a
758 given string such as "etrn-" or "host-serialize-". */
761 /* This structure records a connection to a particular host, for the
762 purpose of serializing access to certain hosts. For possible future extension,
763 a field is defined for holding the count of connections, but it is not
764 at present in use. The same structure is used for recording a running ETRN
770 int count; /* Reserved for possible connection count */
774 /* This structure records the information required for the ratelimit
780 int time_usec; /* Fractional part of time, from gettimeofday() */
781 double rate; /* Smoothed sending rate at that time */
784 /* Same as above, plus a Bloom filter for uniquifying events. */
787 dbdata_ratelimit dbd;
788 time_t bloom_epoch; /* When the Bloom filter was last reset */
789 unsigned bloom_size; /* Number of bytes in the Bloom filter */
790 uschar bloom[40]; /* Bloom filter which may be larger than this */
791 } dbdata_ratelimit_unique;
793 #ifndef DISABLE_PIPE_CONNECT
794 /* This structure records the EHLO responses, cleartext and crypted,
795 for an IP, as bitmasks (cf. OPTION_TLS) */
798 unsigned short cleartext_features;
799 unsigned short crypted_features;
800 unsigned short cleartext_auths;
801 unsigned short crypted_auths;
807 ehlo_resp_precis data;
814 uschar verify_override:1;
817 } dbdata_tls_session;
820 /* End of dbstuff.h */