/* ldb database library Copyright (C) Andrew Tridgell 2004 Copyright (C) Stefan Metzmacher 2004 ** NOTE! The following LGPL license applies to the ldb ** library. This does NOT imply that all of Samba is released ** under the LGPL This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* * Name: ldb * * Component: ldb header * * Description: defines for base ldb API * * Author: Andrew Tridgell * Author: Stefan Metzmacher */ #ifndef _LDB_H_ #define _LDB_H_ 1 /* major restrictions as compared to normal LDAP: - no async calls. - each record must have a unique key field - the key must be representable as a NULL terminated C string and may not contain a comma or braces major restrictions as compared to tdb: - no explicit locking calls */ /* an individual lump of data in a result comes in this format. The pointer will usually be to a UTF-8 string if the application is sensible, but it can be to anything you like, including binary data blobs of arbitrary size. */ #ifndef ldb_val struct ldb_val { uint8_t *data; size_t length; }; #endif /* these flags are used in ldd_message_element.flags fields. The LDA_FLAGS_MOD_* flags are used in ldap_modify() calls to specify whether attributes are being added, deleted or modified */ #define LDB_FLAG_MOD_MASK 0x3 #define LDB_FLAG_MOD_ADD 1 #define LDB_FLAG_MOD_REPLACE 2 #define LDB_FLAG_MOD_DELETE 3 /* well known object IDs */ #define LDB_OID_COMPARATOR_AND "1.2.840.113556.1.4.803" #define LDB_OID_COMPARATOR_OR "1.2.840.113556.1.4.804" /* results are given back as arrays of ldb_message_element */ struct ldb_message_element { unsigned int flags; const char *name; unsigned int num_values; struct ldb_val *values; }; /* a ldb_message represents all or part of a record. It can contain an arbitrary number of elements. */ struct ldb_message { char *dn; unsigned int num_elements; struct ldb_message_element *elements; void *private_data; /* private to the backend */ }; enum ldb_changetype { LDB_CHANGETYPE_NONE=0, LDB_CHANGETYPE_ADD, LDB_CHANGETYPE_DELETE, LDB_CHANGETYPE_MODIFY }; /* a ldif record - from ldif_read */ struct ldb_ldif { enum ldb_changetype changetype; struct ldb_message *msg; }; enum ldb_scope {LDB_SCOPE_DEFAULT=-1, LDB_SCOPE_BASE=0, LDB_SCOPE_ONELEVEL=1, LDB_SCOPE_SUBTREE=2}; struct ldb_context; /* the fuction type for the callback used in traversing the database */ typedef int (*ldb_traverse_fn)(struct ldb_context *, const struct ldb_message *); struct ldb_module; /* debugging uses one of the following levels */ enum ldb_debug_level {LDB_DEBUG_FATAL, LDB_DEBUG_ERROR, LDB_DEBUG_WARNING, LDB_DEBUG_TRACE}; /* the user can optionally supply a debug function. The function is based on the vfprintf() style of interface, but with the addition of a severity level */ struct ldb_debug_ops { void (*debug)(void *context, enum ldb_debug_level level, const char *fmt, va_list ap); void *context; }; #define LDB_FLG_RDONLY 1 #ifndef PRINTF_ATTRIBUTE #define PRINTF_ATTRIBUTE(a,b) #endif /* structues for ldb_parse_tree handling code */ enum ldb_parse_op {LDB_OP_SIMPLE=1, LDB_OP_EXTENDED=2, LDB_OP_AND='&', LDB_OP_OR='|', LDB_OP_NOT='!'}; struct ldb_parse_tree { enum ldb_parse_op operation; union { struct { char *attr; struct ldb_val value; } simple; struct { char *attr; int dnAttributes; char *rule_id; struct ldb_val value; } extended; struct { unsigned int num_elements; struct ldb_parse_tree **elements; } list; struct { struct ldb_parse_tree *child; } not; } u; }; struct ldb_parse_tree *ldb_parse_tree(void *mem_ctx, const char *s); char *ldb_filter_from_tree(void *mem_ctx, struct ldb_parse_tree *tree); char *ldb_binary_encode(void *ctx, struct ldb_val val); /* functions for controlling attribute handling */ typedef int (*ldb_attr_handler_t)(struct ldb_context *, const struct ldb_val *, struct ldb_val *); typedef int (*ldb_attr_comparison_t)(struct ldb_context *, const struct ldb_val *, const struct ldb_val *); struct ldb_attrib_handler { const char *attr; /* LDB_ATTR_FLAG_* */ unsigned flags; /* convert from ldif to binary format */ ldb_attr_handler_t ldif_read_fn; /* convert from binary to ldif format */ ldb_attr_handler_t ldif_write_fn; /* canonicalise a value, for use by indexing and dn construction */ ldb_attr_handler_t canonicalise_fn; /* compare two values */ ldb_attr_comparison_t comparison_fn; }; #define LDB_ATTR_FLAG_HIDDEN (1<<0) #define LDB_ATTR_FLAG_WILDCARD (1<<1) /* well-known ldap attribute syntaxes - see rfc2252 section 4.3.2 */ #define LDB_SYNTAX_DN "1.3.6.1.4.1.1466.115.121.1.12" #define LDB_SYNTAX_DIRECTORY_STRING "1.3.6.1.4.1.1466.115.121.1.15" #define LDB_SYNTAX_INTEGER "1.3.6.1.4.1.1466.115.121.1.27" #define LDB_SYNTAX_OCTET_STRING "1.3.6.1.4.1.1466.115.121.1.40" #define LDB_SYNTAX_WILDCARD "LDB_SYNTAX_WILDCARD" #define LDB_SYNTAX_OBJECTCLASS "LDB_SYNTAX_OBJECTCLASS" /* initialise a ldb context */ struct ldb_context *ldb_init(void *mem_ctx); /* connect to a database. The URL can either be one of the following forms ldb://path ldapi://path flags is made up of LDB_FLG_* the options are passed uninterpreted to the backend, and are backend specific */ int ldb_connect(struct ldb_context *ldb, const char *url, unsigned int flags, const char *options[]); /* search the database given a LDAP-like search expression return the number of records found, or -1 on error use talloc_free to free the ldb_message returned */ int ldb_search(struct ldb_context *ldb, const char *base, enum ldb_scope scope, const char *expression, const char * const *attrs, struct ldb_message ***res); /* like ldb_search() but takes a parse tree */ int ldb_search_bytree(struct ldb_context *ldb, const char *base, enum ldb_scope scope, struct ldb_parse_tree *tree, const char * const *attrs, struct ldb_message ***res); /* add a record to the database. Will fail if a record with the given class and key already exists */ int ldb_add(struct ldb_context *ldb, const struct ldb_message *message); /* modify the specified attributes of a record */ int ldb_modify(struct ldb_context *ldb, const struct ldb_message *message); /* rename a record in the database */ int ldb_rename(struct ldb_context *ldb, const char *olddn, const char *newdn); /* create a named lock */ int ldb_lock(struct ldb_context *ldb, const char *lockname); /* release a named lock */ int ldb_unlock(struct ldb_context *ldb, const char *lockname); /* delete a record from the database */ int ldb_delete(struct ldb_context *ldb, const char *dn); /* return extended error information from the last call */ const char *ldb_errstring(struct ldb_context *ldb); /* casefold a string (should be UTF8, but at the moment it isn't) */ char *ldb_casefold(void *mem_ctx, const char *s); int ldb_caseless_cmp(const char *s1, const char *s2); /* ldif manipulation functions */ int ldb_ldif_write(struct ldb_context *ldb, int (*fprintf_fn)(void *, const char *, ...), void *private_data, const struct ldb_ldif *ldif); void ldb_ldif_read_free(struct ldb_context *ldb, struct ldb_ldif *); struct ldb_ldif *ldb_ldif_read(struct ldb_context *ldb, int (*fgetc_fn)(void *), void *private_data); struct ldb_ldif *ldb_ldif_read_file(struct ldb_context *ldb, FILE *f); struct ldb_ldif *ldb_ldif_read_string(struct ldb_context *ldb, const char *s); int ldb_ldif_write_file(struct ldb_context *ldb, FILE *f, const struct ldb_ldif *msg); char *ldb_base64_encode(void *mem_ctx, const char *buf, int len); int ldb_base64_decode(char *s); int ldb_attrib_add_handlers(struct ldb_context *ldb, const struct ldb_attrib_handler *handlers, unsigned num_handlers); /* useful functions for ldb_message structure manipulation */ int ldb_dn_cmp(const char *dn1, const char *dn2); int ldb_attr_cmp(const char *dn1, const char *dn2); /* case-fold a DN */ char *ldb_dn_fold(void * mem_ctx, const char * dn, void * user_data, int (* case_fold_attr_fn)(void * user_data, char * attr)); /* create an empty message */ struct ldb_message *ldb_msg_new(void *mem_ctx); /* find an element within an message */ struct ldb_message_element *ldb_msg_find_element(const struct ldb_message *msg, const char *attr_name); /* compare two ldb_val values - return 0 on match */ int ldb_val_equal_exact(const struct ldb_val *v1, const struct ldb_val *v2); /* find a value within an ldb_message_element */ struct ldb_val *ldb_msg_find_val(const struct ldb_message_element *el, struct ldb_val *val); /* add a new empty element to a ldb_message */ int ldb_msg_add_empty(struct ldb_context *ldb, struct ldb_message *msg, const char *attr_name, int flags); /* add a element to a ldb_message */ int ldb_msg_add(struct ldb_context *ldb, struct ldb_message *msg, const struct ldb_message_element *el, int flags); int ldb_msg_add_value(struct ldb_context *ldb, struct ldb_message *msg, const char *attr_name, const struct ldb_val *val); int ldb_msg_add_string(struct ldb_context *ldb, struct ldb_message *msg, const char *attr_name, const char *str); int ldb_msg_add_fmt(struct ldb_context *ldb, struct ldb_message *msg, const char *attr_name, const char *fmt, ...) PRINTF_ATTRIBUTE(4,5); /* compare two message elements - return 0 on match */ int ldb_msg_element_compare(struct ldb_message_element *el1, struct ldb_message_element *el2); /* find elements in a message and convert to a specific type, with a give default value if not found. Assumes that elements are single valued */ const struct ldb_val *ldb_msg_find_ldb_val(const struct ldb_message *msg, const char *attr_name); int ldb_msg_find_int(const struct ldb_message *msg, const char *attr_name, int default_value); unsigned int ldb_msg_find_uint(const struct ldb_message *msg, const char *attr_name, unsigned int default_value); int64_t ldb_msg_find_int64(const struct ldb_message *msg, const char *attr_name, int64_t default_value); uint64_t ldb_msg_find_uint64(const struct ldb_message *msg, const char *attr_name, uint64_t default_value); double ldb_msg_find_double(const struct ldb_message *msg, const char *attr_name, double default_value); const char *ldb_msg_find_string(const struct ldb_message *msg, const char *attr_name, const char *default_value); void ldb_msg_sort_elements(struct ldb_message *msg); void ldb_msg_free(struct ldb_context *ldb, struct ldb_message *msg); struct ldb_message *ldb_msg_copy(struct ldb_context *ldb, const struct ldb_message *msg); struct ldb_message *ldb_msg_canonicalize(struct ldb_context *ldb, const struct ldb_message *msg); struct ldb_message *ldb_msg_diff(struct ldb_context *ldb, struct ldb_message *msg1, struct ldb_message *msg2); struct ldb_val ldb_val_dup(void *mem_ctx, const struct ldb_val *v); /* this allows the user to set a debug function for error reporting */ int ldb_set_debug(struct ldb_context *ldb, void (*debug)(void *context, enum ldb_debug_level level, const char *fmt, va_list ap), void *context); /* this sets up debug to print messages on stderr */ int ldb_set_debug_stderr(struct ldb_context *ldb); /* control backend specific opaque values */ int ldb_set_opaque(struct ldb_context *ldb, const char *name, void *value); void *ldb_get_opaque(struct ldb_context *ldb, const char *name); #endif