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Diffstat (limited to 'src/dbstuff.h')
| -rw-r--r-- | src/dbstuff.h | 823 |
1 files changed, 823 insertions, 0 deletions
diff --git a/src/dbstuff.h b/src/dbstuff.h new file mode 100644 index 0000000..c1fb543 --- /dev/null +++ b/src/dbstuff.h @@ -0,0 +1,823 @@ +/************************************************* +* Exim - an Internet mail transport agent * +*************************************************/ + +/* Copyright (c) University of Cambridge 1995 - 2018 */ +/* Copyright (c) The Exim Maintainers 2020 */ +/* See the file NOTICE for conditions of use and distribution. */ + +/* This header file contains macro definitions so that a variety of DBM +libraries can be used by Exim. Nigel Metheringham provided the original set for +Berkeley DB 1.x in native mode and ndbm. Subsequently, versions for Berkeley DB +2.x and 3.x were added. Later still, support for tdb was added, courtesy of +James Antill. Most recently, support for native mode gdbm was added, with code +from Pierre A. Humblet, so Exim could be made to work with Cygwin. + +For convenience, the definitions of the structures used in the various hints +databases are also kept in this file, which is used by the maintenance +utilities as well as the main Exim binary. */ + + +# ifdef USE_TDB + +/* ************************* tdb interface ************************ */ + +#include <tdb.h> + +/* Basic DB type */ +#define EXIM_DB TDB_CONTEXT + +/* Cursor type: tdb uses the previous "key" in _nextkey() (really it wants +tdb_traverse to be called) */ +#define EXIM_CURSOR TDB_DATA + +/* The datum type used for queries */ +#define EXIM_DATUM TDB_DATA + +/* Some text for messages */ +#define EXIM_DBTYPE "tdb" + +/* Access functions */ + +/* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed */ +#define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \ + *(dbpp) = tdb_open(CS name, 0, TDB_DEFAULT, flags, mode) + +/* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */ +#define EXIM_DBGET(db, key, data) \ + (data = tdb_fetch(db, key), data.dptr != NULL) + +/* EXIM_DBPUT - returns nothing useful, assumes replace mode */ +#define EXIM_DBPUT(db, key, data) \ + tdb_store(db, key, data, TDB_REPLACE) + +/* EXIM_DBPUTB - non-overwriting for use by dbmbuild */ +#define EXIM_DBPUTB(db, key, data) \ + tdb_store(db, key, data, TDB_INSERT) + +/* Returns from EXIM_DBPUTB */ + +#define EXIM_DBPUTB_OK 0 +#define EXIM_DBPUTB_DUP (-1) + +/* EXIM_DBDEL */ +#define EXIM_DBDEL(db, key) tdb_delete(db, key) + +/* EXIM_DBCREATE_CURSOR - initialize for scanning operation */ +#define EXIM_DBCREATE_CURSOR(db, cursor) { \ + *(cursor) = store_malloc(sizeof(TDB_DATA)); (*(cursor))->dptr = NULL; } + +/* EXIM_DBSCAN - This is complicated because we have to free the last datum +free() must not die when passed NULL */ +#define EXIM_DBSCAN(db, key, data, first, cursor) \ + (key = (first ? tdb_firstkey(db) : tdb_nextkey(db, *(cursor))), \ + free((cursor)->dptr), *(cursor) = key, \ + key.dptr != NULL) + +/* EXIM_DBDELETE_CURSOR - terminate scanning operation. */ +#define EXIM_DBDELETE_CURSOR(cursor) free(cursor) + +/* EXIM_DBCLOSE */ +#define EXIM_DBCLOSE__(db) tdb_close(db) + +/* Datum access types - these are intended to be assignable */ + +#define EXIM_DATUM_SIZE(datum) (datum).dsize +#define EXIM_DATUM_DATA(datum) (datum).dptr + +/* Free the stuff inside the datum. */ + +#define EXIM_DATUM_FREE(datum) (free((datum).dptr), (datum).dptr = NULL) + +/* No initialization is needed. */ + +#define EXIM_DATUM_INIT(datum) + + + +/********************* Berkeley db native definitions **********************/ + +#elif defined USE_DB + +#include <db.h> + + +/* We can distinguish between versions 1.x and 2.x/3.x by looking for a +definition of DB_VERSION_STRING, which is present in versions 2.x onwards. */ + +#ifdef DB_VERSION_STRING + +# if DB_VERSION_MAJOR >= 6 +# error Version 6 and later BDB API is not supported +# endif + +/* The API changed (again!) between the 2.x and 3.x versions */ + +#if DB_VERSION_MAJOR >= 3 + +/***************** Berkeley db 3.x/4.x native definitions ******************/ + +/* Basic DB type */ +# if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1) +# define EXIM_DB DB_ENV +/* Cursor type, for scanning */ +# define EXIM_CURSOR DBC + +/* The datum type used for queries */ +# define EXIM_DATUM DBT + +/* Some text for messages */ +# define EXIM_DBTYPE "db (v4.1+)" + +/* Only more-recent versions. 5+ ? */ +# ifndef DB_FORCESYNC +# define DB_FORCESYNC 0 +# endif + + +/* Access functions */ + +/* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed. The +API changed for DB 4.1. - and we also starting using the "env" with a +specified working dir, to avoid the DBCONFIG file trap. */ + +# define ENV_TO_DB(env) ((DB *)((env)->app_private)) + +# define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \ + if ( db_env_create(dbpp, 0) != 0 \ + || ((*dbpp)->set_errcall(*dbpp, dbfn_bdb_error_callback), 0) \ + || (*dbpp)->open(*dbpp, CS dirname, DB_CREATE|DB_INIT_MPOOL|DB_PRIVATE, 0) != 0\ + ) \ + *dbpp = NULL; \ + else if (db_create((DB **) &((*dbpp)->app_private), *dbpp, 0) != 0) \ + { \ + ((DB_ENV *)(*dbpp))->close((DB_ENV *)(*dbpp), 0); \ + *dbpp = NULL; \ + } \ + else if (ENV_TO_DB(*dbpp)->open(ENV_TO_DB(*dbpp), NULL, CS name, NULL, \ + (flags) == O_RDONLY ? DB_UNKNOWN : DB_HASH, \ + (flags) == O_RDONLY ? DB_RDONLY : DB_CREATE, \ + mode) != 0 \ + ) \ + { \ + ENV_TO_DB(*dbpp)->close(ENV_TO_DB(*dbpp), 0); \ + ((DB_ENV *)(*dbpp))->close((DB_ENV *)(*dbpp), 0); \ + *dbpp = NULL; \ + } + +/* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */ +# define EXIM_DBGET(db, key, data) \ + (ENV_TO_DB(db)->get(ENV_TO_DB(db), NULL, &key, &data, 0) == 0) + +/* EXIM_DBPUT - returns nothing useful, assumes replace mode */ +# define EXIM_DBPUT(db, key, data) \ + ENV_TO_DB(db)->put(ENV_TO_DB(db), NULL, &key, &data, 0) + +/* EXIM_DBPUTB - non-overwriting for use by dbmbuild */ +# define EXIM_DBPUTB(db, key, data) \ + ENV_TO_DB(db)->put(ENV_TO_DB(db), NULL, &key, &data, DB_NOOVERWRITE) + +/* Return values from EXIM_DBPUTB */ + +# define EXIM_DBPUTB_OK 0 +# define EXIM_DBPUTB_DUP DB_KEYEXIST + +/* EXIM_DBDEL */ +# define EXIM_DBDEL(db, key) ENV_TO_DB(db)->del(ENV_TO_DB(db), NULL, &key, 0) + +/* EXIM_DBCREATE_CURSOR - initialize for scanning operation */ + +# define EXIM_DBCREATE_CURSOR(db, cursor) \ + ENV_TO_DB(db)->cursor(ENV_TO_DB(db), NULL, cursor, 0) + +/* EXIM_DBSCAN - returns TRUE if data is returned, FALSE at end */ +# define EXIM_DBSCAN(db, key, data, first, cursor) \ + ((cursor)->c_get(cursor, &key, &data, \ + (first? DB_FIRST : DB_NEXT)) == 0) + +/* EXIM_DBDELETE_CURSOR - terminate scanning operation */ +# define EXIM_DBDELETE_CURSOR(cursor) \ + (cursor)->c_close(cursor) + +/* EXIM_DBCLOSE */ +# define EXIM_DBCLOSE__(db) \ + (ENV_TO_DB(db)->close(ENV_TO_DB(db), 0) , ((DB_ENV *)(db))->close((DB_ENV *)(db), DB_FORCESYNC)) + +/* Datum access types - these are intended to be assignable. */ + +# define EXIM_DATUM_SIZE(datum) (datum).size +# define EXIM_DATUM_DATA(datum) (datum).data + +/* The whole datum structure contains other fields that must be cleared +before use, but we don't have to free anything after reading data. */ + +# define EXIM_DATUM_INIT(datum) memset(&datum, 0, sizeof(datum)) +# define EXIM_DATUM_FREE(datum) + +# else /* pre- 4.1 */ + +# define EXIM_DB DB + +/* Cursor type, for scanning */ +# define EXIM_CURSOR DBC + +/* The datum type used for queries */ +# define EXIM_DATUM DBT + +/* Some text for messages */ +# define EXIM_DBTYPE "db (v3/4)" + +/* Access functions */ + +/* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed. */ + +# define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \ + if (db_create(dbpp, NULL, 0) != 0 || \ + ((*dbpp)->set_errcall(*dbpp, dbfn_bdb_error_callback), \ + ((*dbpp)->open)(*dbpp, CS name, NULL, \ + ((flags) == O_RDONLY)? DB_UNKNOWN : DB_HASH, \ + ((flags) == O_RDONLY)? DB_RDONLY : DB_CREATE, \ + mode)) != 0) *(dbpp) = NULL + +/* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */ +# define EXIM_DBGET(db, key, data) \ + ((db)->get(db, NULL, &key, &data, 0) == 0) + +/* EXIM_DBPUT - returns nothing useful, assumes replace mode */ +# define EXIM_DBPUT(db, key, data) \ + (db)->put(db, NULL, &key, &data, 0) + +/* EXIM_DBPUTB - non-overwriting for use by dbmbuild */ +# define EXIM_DBPUTB(db, key, data) \ + (db)->put(db, NULL, &key, &data, DB_NOOVERWRITE) + +/* Return values from EXIM_DBPUTB */ + +# define EXIM_DBPUTB_OK 0 +# define EXIM_DBPUTB_DUP DB_KEYEXIST + +/* EXIM_DBDEL */ +# define EXIM_DBDEL(db, key) (db)->del(db, NULL, &key, 0) + +/* EXIM_DBCREATE_CURSOR - initialize for scanning operation */ + +# define EXIM_DBCREATE_CURSOR(db, cursor) \ + (db)->cursor(db, NULL, cursor, 0) + +/* EXIM_DBSCAN - returns TRUE if data is returned, FALSE at end */ +# define EXIM_DBSCAN(db, key, data, first, cursor) \ + ((cursor)->c_get(cursor, &key, &data, \ + (first? DB_FIRST : DB_NEXT)) == 0) + +/* EXIM_DBDELETE_CURSOR - terminate scanning operation */ +# define EXIM_DBDELETE_CURSOR(cursor) \ + (cursor)->c_close(cursor) + +/* EXIM_DBCLOSE */ +# define EXIM_DBCLOSE__(db) (db)->close(db, 0) + +/* Datum access types - these are intended to be assignable. */ + +# define EXIM_DATUM_SIZE(datum) (datum).size +# define EXIM_DATUM_DATA(datum) (datum).data + +/* The whole datum structure contains other fields that must be cleared +before use, but we don't have to free anything after reading data. */ + +# define EXIM_DATUM_INIT(datum) memset(&datum, 0, sizeof(datum)) +# define EXIM_DATUM_FREE(datum) + +# endif + + +#else /* DB_VERSION_MAJOR >= 3 */ + +/******************* Berkeley db 2.x native definitions ********************/ + +/* Basic DB type */ +#define EXIM_DB DB + +/* Cursor type, for scanning */ +#define EXIM_CURSOR DBC + +/* The datum type used for queries */ +#define EXIM_DATUM DBT + +/* Some text for messages */ +#define EXIM_DBTYPE "db (v2)" + +/* Access functions */ + +/* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed */ +#define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \ + if ((errno = db_open(CS name, DB_HASH, \ + ((flags) == O_RDONLY)? DB_RDONLY : DB_CREATE, \ + mode, NULL, NULL, dbpp)) != 0) *(dbpp) = NULL + +/* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */ +#define EXIM_DBGET(db, key, data) \ + ((db)->get(db, NULL, &key, &data, 0) == 0) + +/* EXIM_DBPUT - returns nothing useful, assumes replace mode */ +#define EXIM_DBPUT(db, key, data) \ + (db)->put(db, NULL, &key, &data, 0) + +/* EXIM_DBPUTB - non-overwriting for use by dbmbuild */ +#define EXIM_DBPUTB(db, key, data) \ + (db)->put(db, NULL, &key, &data, DB_NOOVERWRITE) + +/* Return values from EXIM_DBPUTB */ + +#define EXIM_DBPUTB_OK 0 +#define EXIM_DBPUTB_DUP DB_KEYEXIST + +/* EXIM_DBDEL */ +#define EXIM_DBDEL(db, key) (db)->del(db, NULL, &key, 0) + +/* EXIM_DBCREATE_CURSOR - initialize for scanning operation */ + +/* The API of this function was changed between releases 2.4.14 and 2.7.3. I do +not know exactly where the change happened, but the Change Log for 2.5.9 lists +the new option that is available, so I guess that it happened at 2.5.x. */ + +#if DB_VERSION_MINOR >= 5 +#define EXIM_DBCREATE_CURSOR(db, cursor) \ + (db)->cursor(db, NULL, cursor, 0) +#else +#define EXIM_DBCREATE_CURSOR(db, cursor) \ + (db)->cursor(db, NULL, cursor) +#endif + +/* EXIM_DBSCAN - returns TRUE if data is returned, FALSE at end */ +#define EXIM_DBSCAN(db, key, data, first, cursor) \ + ((cursor)->c_get(cursor, &key, &data, \ + (first? DB_FIRST : DB_NEXT)) == 0) + +/* EXIM_DBDELETE_CURSOR - terminate scanning operation */ +#define EXIM_DBDELETE_CURSOR(cursor) \ + (cursor)->c_close(cursor) + +/* EXIM_DBCLOSE */ +#define EXIM_DBCLOSE__(db) (db)->close(db, 0) + +/* Datum access types - these are intended to be assignable. */ + +#define EXIM_DATUM_SIZE(datum) (datum).size +#define EXIM_DATUM_DATA(datum) (datum).data + +/* The whole datum structure contains other fields that must be cleared +before use, but we don't have to free anything after reading data. */ + +#define EXIM_DATUM_INIT(datum) memset(&datum, 0, sizeof(datum)) +#define EXIM_DATUM_FREE(datum) + +#endif /* DB_VERSION_MAJOR >= 3 */ + + +/* If DB_VERSION_TYPE is not defined, we have version 1.x */ + +#else /* DB_VERSION_TYPE */ + +/******************* Berkeley db 1.x native definitions ********************/ + +/* Basic DB type */ +#define EXIM_DB DB + +/* Cursor type, not used with DB 1.x: just set up a dummy */ +#define EXIM_CURSOR int + +/* The datum type used for queries */ +#define EXIM_DATUM DBT + +/* Some text for messages */ +#define EXIM_DBTYPE "db (v1)" + +/* When scanning, for the non-first case we historically just passed 0 +as the flags field and it worked. On FreeBSD 8 it no longer works and +instead leads to memory exhaustion. The man-page on FreeBSD says to use +R_NEXT, but this 1.x is a historical fallback and I've no idea how portable +the use of that flag is; so the solution is to define R_NEXT here if it's not +already defined, with a default value of 0 because that's what we've always +before been able to pass successfully. */ +#ifndef R_NEXT +#define R_NEXT 0 +#endif + +/* Access functions */ + +/* EXIM_DBOPEN - sets *dbpp to point to an EXIM_DB, NULL if failed */ +#define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \ + *(dbpp) = dbopen(CS name, flags, mode, DB_HASH, NULL) + +/* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */ +#define EXIM_DBGET(db, key, data) \ + ((db)->get(db, &key, &data, 0) == 0) + +/* EXIM_DBPUT - returns nothing useful, assumes replace mode */ +#define EXIM_DBPUT(db, key, data) \ + (db)->put(db, &key, &data, 0) + +/* EXIM_DBPUTB - non-overwriting for use by dbmbuild */ +#define EXIM_DBPUTB(db, key, data) \ + (db)->put(db, &key, &data, R_NOOVERWRITE) + +/* Returns from EXIM_DBPUTB */ + +#define EXIM_DBPUTB_OK 0 +#define EXIM_DBPUTB_DUP 1 + +/* EXIM_DBDEL */ +#define EXIM_DBDEL(db, key) (db)->del(db, &key, 0) + +/* EXIM_DBCREATE_CURSOR - initialize for scanning operation (null) */ +#define EXIM_DBCREATE_CURSOR(db, cursor) {} + +/* EXIM_DBSCAN - returns TRUE if data is returned, FALSE at end */ +#define EXIM_DBSCAN(db, key, data, first, cursor) \ + ((db)->seq(db, &key, &data, (first? R_FIRST : R_NEXT)) == 0) + +/* EXIM_DBDELETE_CURSOR - terminate scanning operation (null). Make it +refer to cursor, to keep picky compilers happy. */ +#define EXIM_DBDELETE_CURSOR(cursor) { cursor = cursor; } + +/* EXIM_DBCLOSE */ +#define EXIM_DBCLOSE__(db) (db)->close(db) + +/* Datum access types - these are intended to be assignable */ + +#define EXIM_DATUM_SIZE(datum) (datum).size +#define EXIM_DATUM_DATA(datum) (datum).data + +/* There's no clearing required before use, and we don't have to free anything +after reading data. */ + +#define EXIM_DATUM_INIT(datum) +#define EXIM_DATUM_FREE(datum) + +#endif /* DB_VERSION_STRING */ + + + +/********************* gdbm interface definitions **********************/ + +#elif defined USE_GDBM + +#include <gdbm.h> + +/* Basic DB type */ +typedef struct { + GDBM_FILE gdbm; /* Database */ + datum lkey; /* Last key, for scans */ +} EXIM_DB; + +/* Cursor type, not used with gdbm: just set up a dummy */ +#define EXIM_CURSOR int + +/* The datum type used for queries */ +#define EXIM_DATUM datum + +/* Some text for messages */ + +#define EXIM_DBTYPE "gdbm" + +/* Access functions */ + +/* EXIM_DBOPEN - returns a EXIM_DB *, NULL if failed */ +#define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \ + { (*(dbpp)) = (EXIM_DB *) malloc(sizeof(EXIM_DB));\ + if (*(dbpp) != NULL) { \ + (*(dbpp))->lkey.dptr = NULL;\ + (*(dbpp))->gdbm = gdbm_open(CS name, 0, (((flags) & O_CREAT))?GDBM_WRCREAT:(((flags) & (O_RDWR|O_WRONLY))?GDBM_WRITER:GDBM_READER), mode, 0);\ + if ((*(dbpp))->gdbm == NULL) {\ + free(*(dbpp));\ + *(dbpp) = NULL;\ + }\ + }\ + } + +/* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */ +#define EXIM_DBGET(db, key, data) \ + (data = gdbm_fetch(db->gdbm, key), data.dptr != NULL) + +/* EXIM_DBPUT - returns nothing useful, assumes replace mode */ +#define EXIM_DBPUT(db, key, data) \ + gdbm_store(db->gdbm, key, data, GDBM_REPLACE) + +/* EXIM_DBPUTB - non-overwriting for use by dbmbuild */ +#define EXIM_DBPUTB(db, key, data) \ + gdbm_store(db->gdbm, key, data, GDBM_INSERT) + +/* Returns from EXIM_DBPUTB */ + +#define EXIM_DBPUTB_OK 0 +#define EXIM_DBPUTB_DUP 1 + +/* EXIM_DBDEL */ +#define EXIM_DBDEL(db, key) gdbm_delete(db->gdbm, key) + +/* EXIM_DBCREATE_CURSOR - initialize for scanning operation (null) */ +#define EXIM_DBCREATE_CURSOR(db, cursor) {} + +/* EXIM_DBSCAN */ +#define EXIM_DBSCAN(db, key, data, first, cursor) \ + ( key = ((first)? gdbm_firstkey(db->gdbm) : gdbm_nextkey(db->gdbm, db->lkey)), \ + (((db)->lkey.dptr != NULL)? (free((db)->lkey.dptr),1) : 1),\ + db->lkey = key, key.dptr != NULL) + +/* EXIM_DBDELETE_CURSOR - terminate scanning operation (null). Make it +refer to cursor, to keep picky compilers happy. */ +#define EXIM_DBDELETE_CURSOR(cursor) { cursor = cursor; } + +/* EXIM_DBCLOSE */ +#define EXIM_DBCLOSE__(db) \ +{ gdbm_close((db)->gdbm);\ + if ((db)->lkey.dptr != NULL) free((db)->lkey.dptr);\ + free(db); } + +/* Datum access types - these are intended to be assignable */ + +#define EXIM_DATUM_SIZE(datum) (datum).dsize +#define EXIM_DATUM_DATA(datum) (datum).dptr + +/* There's no clearing required before use, but we have to free the dptr +after reading data. */ + +#define EXIM_DATUM_INIT(datum) +#define EXIM_DATUM_FREE(datum) free(datum.dptr) + +#else /* USE_GDBM */ + + +/* If none of USE_DB, USG_GDBM, or USE_TDB are set, the default is the NDBM +interface */ + + +/********************* ndbm interface definitions **********************/ + +#include <ndbm.h> + +/* Basic DB type */ +#define EXIM_DB DBM + +/* Cursor type, not used with ndbm: just set up a dummy */ +#define EXIM_CURSOR int + +/* The datum type used for queries */ +#define EXIM_DATUM datum + +/* Some text for messages */ + +#define EXIM_DBTYPE "ndbm" + +/* Access functions */ + +/* EXIM_DBOPEN - returns a EXIM_DB *, NULL if failed */ +#define EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) \ + *(dbpp) = dbm_open(CS name, flags, mode) + +/* EXIM_DBGET - returns TRUE if successful, FALSE otherwise */ +#define EXIM_DBGET(db, key, data) \ + (data = dbm_fetch(db, key), data.dptr != NULL) + +/* EXIM_DBPUT - returns nothing useful, assumes replace mode */ +#define EXIM_DBPUT(db, key, data) \ + dbm_store(db, key, data, DBM_REPLACE) + +/* EXIM_DBPUTB - non-overwriting for use by dbmbuild */ +#define EXIM_DBPUTB(db, key, data) \ + dbm_store(db, key, data, DBM_INSERT) + +/* Returns from EXIM_DBPUTB */ + +#define EXIM_DBPUTB_OK 0 +#define EXIM_DBPUTB_DUP 1 + +/* EXIM_DBDEL */ +#define EXIM_DBDEL(db, key) dbm_delete(db, key) + +/* EXIM_DBCREATE_CURSOR - initialize for scanning operation (null) */ +#define EXIM_DBCREATE_CURSOR(db, cursor) {} + +/* EXIM_DBSCAN */ +#define EXIM_DBSCAN(db, key, data, first, cursor) \ + (key = (first? dbm_firstkey(db) : dbm_nextkey(db)), key.dptr != NULL) + +/* EXIM_DBDELETE_CURSOR - terminate scanning operation (null). Make it +refer to cursor, to keep picky compilers happy. */ +#define EXIM_DBDELETE_CURSOR(cursor) { cursor = cursor; } + +/* EXIM_DBCLOSE */ +#define EXIM_DBCLOSE__(db) dbm_close(db) + +/* Datum access types - these are intended to be assignable */ + +#define EXIM_DATUM_SIZE(datum) (datum).dsize +#define EXIM_DATUM_DATA(datum) (datum).dptr + +/* There's no clearing required before use, and we don't have to free anything +after reading data. */ + +#define EXIM_DATUM_INIT(datum) +#define EXIM_DATUM_FREE(datum) + +#endif /* USE_GDBM */ + + + + + +# ifdef COMPILE_UTILITY + +# define EXIM_DBOPEN(name, dirname, flags, mode, dbpp) \ + EXIM_DBOPEN__(name, dirname, flags, mode, dbpp) +# define EXIM_DBCLOSE(db) EXIM_DBCLOSE__(db) + +# else + +# define EXIM_DBOPEN(name, dirname, flags, mode, dbpp) \ + do { \ + DEBUG(D_hints_lookup) \ + debug_printf_indent("EXIM_DBOPEN: file <%s> dir <%s> flags=%s\n", \ + (name), (dirname), \ + (flags) == O_RDONLY ? "O_RDONLY" \ + : (flags) == O_RDWR ? "O_RDWR" \ + : (flags) == (O_RDWR|O_CREAT) ? "O_RDWR|O_CREAT" \ + : "??"); \ + if (is_tainted(name) || is_tainted(dirname)) \ + { \ + log_write(0, LOG_MAIN|LOG_PANIC, "Tainted name for DB file not permitted"); \ + *dbpp = NULL; \ + } \ + else \ + { EXIM_DBOPEN__(name, dirname, flags, mode, dbpp); } \ + DEBUG(D_hints_lookup) debug_printf_indent("returned from EXIM_DBOPEN: %p\n", *dbpp); \ + } while(0) +# define EXIM_DBCLOSE(db) \ + do { \ + DEBUG(D_hints_lookup) debug_printf_indent("EXIM_DBCLOSE(%p)\n", db); \ + EXIM_DBCLOSE__(db); \ + } while(0) + +# endif + +/********************* End of dbm library definitions **********************/ + + +/* Structure for carrying around an open DBM file, and an open locking file +that relates to it. */ + +typedef struct { + EXIM_DB *dbptr; + int lockfd; +} open_db; + + +/* Structures for records stored in exim database dbm files. They all +start with the same fields, described in the generic type. */ + + +typedef struct { + time_t time_stamp; /* Timestamp of writing */ +} dbdata_generic; + + +/* This structure keeps track of retry information for a host or a local +address. */ + +typedef struct { + time_t time_stamp; + /*************/ + time_t first_failed; /* Time of first failure */ + time_t last_try; /* Time of last try */ + time_t next_try; /* Time of next try */ + BOOL expired; /* Retry time has expired */ + int basic_errno; /* Errno of last failure */ + int more_errno; /* Additional information */ + uschar text[1]; /* Text message for last failure */ +} dbdata_retry; + +/* These structures keep track of addresses that have had callout verification +performed on them. There are two groups of records: + +1. keyed by localpart@domain - + Full address was tested and record holds result + +2. keyed by domain - + Domain response upto MAIL FROM:<>, postmaster, random local part; + +If a record exists, the result field is either ccache_accept or ccache_reject, +or, for a domain record only, ccache_reject_mfnull when MAIL FROM:<> was +rejected. The other fields, however, (which are only relevant to domain +records) may also contain ccache_unknown if that particular test has not been +done. + +Originally, there was only one structure, used for both types. However, it got +expanded for domain records, so it got split. To make it possible for Exim to +handle the old type of record, we retain the old definition. The different +kinds of record can be distinguished by their different lengths. */ + +typedef struct { + time_t time_stamp; + /*************/ + int result; + int postmaster_result; /* Postmaster is accepted */ + int random_result; /* Random local part was accepted */ +} dbdata_callout_cache_obs; + +typedef struct { + time_t time_stamp; /* Timestamp of last address check */ + /*************/ + int result; /* accept or reject */ +} dbdata_callout_cache_address; + +/* For this new layout, we put the additional fields (the timestamps) +last so that if somebody reverts to an older Exim, the new records will +still make sense because they match the old layout. */ + +typedef struct { + time_t time_stamp; /* Time stamp of last connection */ + /*************/ + int result; /* Domain reject or accept */ + int postmaster_result; /* Postmaster result */ + int random_result; /* Random result */ + time_t postmaster_stamp; /* Timestamp of postmaster check */ + time_t random_stamp; /* Timestamp of random check */ +} dbdata_callout_cache; + +/* This structure keeps track of messages that are waiting for a particular +host for a particular transport. */ + +typedef struct { + time_t time_stamp; + /*************/ + int count; /* Count of message ids */ + int sequence; /* Sequence for continued records */ + uschar text[1]; /* One long character string */ +} dbdata_wait; + + +/* The contents of the "misc" database are a mixture of different kinds of +record, as defined below. The keys used for a specific type all start with a +given string such as "etrn-" or "host-serialize-". */ + + +/* This structure records a connection to a particular host, for the +purpose of serializing access to certain hosts. For possible future extension, +a field is defined for holding the count of connections, but it is not +at present in use. The same structure is used for recording a running ETRN +process. */ + +typedef struct { + time_t time_stamp; + /*************/ + int count; /* Reserved for possible connection count */ +} dbdata_serialize; + + +/* This structure records the information required for the ratelimit +ACL condition. */ + +typedef struct { + time_t time_stamp; + /*************/ + int time_usec; /* Fractional part of time, from gettimeofday() */ + double rate; /* Smoothed sending rate at that time */ +} dbdata_ratelimit; + +/* Same as above, plus a Bloom filter for uniquifying events. */ + +typedef struct { + dbdata_ratelimit dbd; + time_t bloom_epoch; /* When the Bloom filter was last reset */ + unsigned bloom_size; /* Number of bytes in the Bloom filter */ + uschar bloom[40]; /* Bloom filter which may be larger than this */ +} dbdata_ratelimit_unique; + +#ifndef DISABLE_PIPE_CONNECT +/* This structure records the EHLO responses, cleartext and crypted, +for an IP, as bitmasks (cf. OPTION_TLS) */ + +typedef struct { + unsigned short cleartext_features; + unsigned short crypted_features; + unsigned short cleartext_auths; + unsigned short crypted_auths; +} ehlo_resp_precis; + +typedef struct { + time_t time_stamp; + /*************/ + ehlo_resp_precis data; +} dbdata_ehlo_resp; +#endif + +typedef struct { + time_t time_stamp; + /*************/ + uschar verify_override:1; + uschar ocsp:3; + uschar session[1]; +} dbdata_tls_session; + + +/* End of dbstuff.h */ |