source4/lib/ldb/include/ldb_private.h

   1 /*
   2    ldb database library
   3
   4    Copyright (C) Andrew Tridgell    2004
   5    Copyright (C) Stefan Metzmacher  2004
   6    Copyright (C) Simo Sorce         2004-2005
   7
   8      ** NOTE! The following LGPL license applies to the ldb
   9      ** library. This does NOT imply that all of Samba is released
  10      ** under the LGPL
  11
  12    This library is free software; you can redistribute it and/or
  13    modify it under the terms of the GNU Lesser General Public
  14    License as published by the Free Software Foundation; either
  15    version 3 of the License, or (at your option) any later version.
  16
  17    This library is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20    Lesser General Public License for more details.
  21
  22    You should have received a copy of the GNU Lesser General Public
  23    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  24 */
  25
  26 /*
  27  *  Name: ldb
  28  *
  29  *  Component: ldb private header
  30  *
  31  *  Description: defines internal ldb structures used by the subsystem and modules
  32  *
  33  *  Author: Andrew Tridgell
  34  *  Author: Stefan Metzmacher
  35  */
  36
  37 #ifndef _LDB_PRIVATE_H_
  38 #define _LDB_PRIVATE_H_ 1
  39
  40 struct ldb_context;
  41
  42 struct ldb_module_ops;
  43
  44 struct ldb_backend_ops;
  45
  46 struct ldb_handle {
  47         int status;
  48         enum ldb_state state;
  49         struct ldb_context *ldb;
  50 };
  51
  52 /* basic module structure */
  53 struct ldb_module {
  54         struct ldb_module *prev, *next;
  55         struct ldb_context *ldb;
  56         void *private_data;
  57         const struct ldb_module_ops *ops;
  58 };
  59
  60 /*
  61    these function pointers define the operations that a ldb module can intercept
  62 */
  63 struct ldb_module_ops {
  64         const char *name;
  65         int (*init_context) (struct ldb_module *);
  66         int (*search)(struct ldb_module *, struct ldb_request *); /* search */
  67         int (*add)(struct ldb_module *, struct ldb_request *); /* add */
  68         int (*modify)(struct ldb_module *, struct ldb_request *); /* modify */
  69         int (*del)(struct ldb_module *, struct ldb_request *); /* delete */
  70         int (*rename)(struct ldb_module *, struct ldb_request *); /* rename */
  71         int (*request)(struct ldb_module *, struct ldb_request *); /* match any other operation */
  72         int (*extended)(struct ldb_module *, struct ldb_request *); /* extended operations */
  73         int (*start_transaction)(struct ldb_module *);
  74         int (*end_transaction)(struct ldb_module *);
  75         int (*del_transaction)(struct ldb_module *);
  76         int (*sequence_number)(struct ldb_module *, struct ldb_request *);
  77     void *private_data;
  78 };
  79
  80 /*
  81   schema related information needed for matching rules
  82 */
  83 struct ldb_schema {
  84         /* attribute handling table */
  85         unsigned num_attributes;
  86         struct ldb_schema_attribute *attributes;
  87 };
  88
  89 /*
  90   every ldb connection is started by establishing a ldb_context
  91 */
  92 struct ldb_context {
  93         /* the operations provided by the backend */
  94         struct ldb_module *modules;
  95
  96         /* debugging operations */
  97         struct ldb_debug_ops debug_ops;
  98
  99         /* custom utf8 functions */
 100         struct ldb_utf8_fns utf8_fns;
 101
 102         /* backend specific opaque parameters */
 103         struct ldb_opaque {
 104                 struct ldb_opaque *next;
 105                 const char *name;
 106                 void *value;
 107         } *opaque;
 108
 109         struct ldb_schema schema;
 110
 111         char *err_string;
 112
 113         int transaction_active;
 114
 115         int default_timeout;
 116
 117         unsigned int flags;
 118
 119         unsigned int create_perms;
 120
 121         char *modules_dir;
 122
 123         struct event_context *ev_ctx;
 124 };
 125
 126 #ifndef ARRAY_SIZE
 127 #define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
 128 #endif
 129
 130 /*
 131   simplify out of memory handling
 132 */
 133 #define ldb_oom(ldb) ldb_debug_set(ldb, LDB_DEBUG_FATAL, "ldb out of memory at %s:%d\n", __FILE__, __LINE__)
 134
 135 /* The following definitions come from lib/ldb/common/ldb.c  */
 136
 137 int ldb_connect_backend(struct ldb_context *ldb, const char *url, const char *options[],
 138                         struct ldb_module **backend_module);
 139 void ldb_set_default_dns(struct ldb_context *ldb);
 140
 141 /* The following definitions come from lib/ldb/common/ldb_debug.c  */
 142 void ldb_debug(struct ldb_context *ldb, enum ldb_debug_level level, const char *fmt, ...) PRINTF_ATTRIBUTE(3, 4);
 143 void ldb_debug_set(struct ldb_context *ldb, enum ldb_debug_level level,
 144                    const char *fmt, ...) PRINTF_ATTRIBUTE(3, 4);
 145
 146 /* The following definitions come from lib/ldb/common/ldb_ldif.c  */
 147 int ldb_should_b64_encode(const struct ldb_val *val);
 148
 149 extern const struct ldb_module_ops ldb_objectclass_module_ops;
 150 extern const struct ldb_module_ops ldb_operational_module_ops;
 151 extern const struct ldb_module_ops ldb_paged_results_module_ops;
 152 extern const struct ldb_module_ops ldb_rdn_name_module_ops;
 153 extern const struct ldb_module_ops ldb_schema_module_ops;
 154 extern const struct ldb_module_ops ldb_asq_module_ops;
 155 extern const struct ldb_module_ops ldb_server_sort_module_ops;
 156 extern const struct ldb_module_ops ldb_ldap_module_ops;
 157 extern const struct ldb_module_ops ldb_ildap_module_ops;
 158 extern const struct ldb_module_ops ldb_paged_searches_module_ops;
 159 extern const struct ldb_module_ops ldb_tdb_module_ops;
 160 extern const struct ldb_module_ops ldb_skel_module_ops;
 161 extern const struct ldb_module_ops ldb_subtree_rename_module_ops;
 162 extern const struct ldb_module_ops ldb_subtree_delete_module_ops;
 163 extern const struct ldb_module_ops ldb_sqlite3_module_ops;
 164 extern const struct ldb_module_ops ldb_wins_ldb_module_ops;
 165 extern const struct ldb_module_ops ldb_ranged_results_module_ops;
 166
 167 extern const struct ldb_backend_ops ldb_tdb_backend_ops;
 168 extern const struct ldb_backend_ops ldb_sqlite3_backend_ops;
 169 extern const struct ldb_backend_ops ldb_ldap_backend_ops;
 170 extern const struct ldb_backend_ops ldb_ldapi_backend_ops;
 171 extern const struct ldb_backend_ops ldb_ldaps_backend_ops;
 172
 173 int ldb_match_msg(struct ldb_context *ldb,
 174                   const struct ldb_message *msg,
 175                   const struct ldb_parse_tree *tree,
 176                   struct ldb_dn *base,
 177                   enum ldb_scope scope);
 178
 179 const struct ldb_schema_syntax *ldb_standard_syntax_by_name(struct ldb_context *ldb,
 180                                                             const char *syntax);
 181
 182 /* The following definitions come from lib/ldb/common/ldb_attributes.c  */
 183
 184 int ldb_schema_attribute_add_with_syntax(struct ldb_context *ldb,
 185                                          const char *name,
 186                                          unsigned flags,
 187                                          const struct ldb_schema_syntax *syntax);
 188 int ldb_schema_attribute_add(struct ldb_context *ldb,
 189                              const char *name,
 190                              unsigned flags,
 191                              const char *syntax);
 192 void ldb_schema_attribute_remove(struct ldb_context *ldb, const char *name);
 193 int ldb_setup_wellknown_attributes(struct ldb_context *ldb);
 194
 195 const char **ldb_subclass_list(struct ldb_context *ldb, const char *classname);
 196 void ldb_subclass_remove(struct ldb_context *ldb, const char *classname);
 197 int ldb_subclass_add(struct ldb_context *ldb, const char *classname, const char *subclass);
 198
 199 int ldb_handler_copy(struct ldb_context *ldb, void *mem_ctx,
 200                      const struct ldb_val *in, struct ldb_val *out);
 201 int ldb_comparison_binary(struct ldb_context *ldb, void *mem_ctx,
 202                           const struct ldb_val *v1, const struct ldb_val *v2);
 203
 204 /* The following definitions come from lib/ldb/common/ldb_controls.c  */
 205 struct ldb_control *get_control_from_list(struct ldb_control **controls, const char *oid);
 206 int save_controls(struct ldb_control *exclude, struct ldb_request *req, struct ldb_control ***saver);
 207 int check_critical_controls(struct ldb_control **controls);
 208
 209 /* The following definitions come from lib/ldb/common/ldb_utf8.c */
 210 char *ldb_casefold_default(void *context, void *mem_ctx, const char *s, size_t n);
 211
 212 void ldb_msg_remove_element(struct ldb_message *msg, struct ldb_message_element *el);
 213
 214 /**
 215   Obtain current/next database sequence number
 216 */
 217 int ldb_sequence_number(struct ldb_context *ldb, enum ldb_sequence_type type, uint64_t *seq_num);
 218
 219 #define LDB_SEQ_GLOBAL_SEQUENCE    0x01
 220 #define LDB_SEQ_TIMESTAMP_SEQUENCE 0x02
 221
 222
 223 /* MODULES specific headers -- SSS */
 224
 225 /* The following definitions come from lib/ldb/common/ldb_modules.c  */
 226
 227 const char **ldb_modules_list_from_string(struct ldb_context *ldb, TALLOC_CTX *mem_ctx, const char *string);
 228 int ldb_load_modules_list(struct ldb_context *ldb, const char **module_list, struct ldb_module *backend, struct ldb_module **out);
 229 int ldb_load_modules(struct ldb_context *ldb, const char *options[]);
 230 int ldb_init_module_chain(struct ldb_context *ldb, struct ldb_module *module);
 231 int ldb_next_request(struct ldb_module *module, struct ldb_request *request);
 232 int ldb_next_start_trans(struct ldb_module *module);
 233 int ldb_next_end_trans(struct ldb_module *module);
 234 int ldb_next_del_trans(struct ldb_module *module);
 235 int ldb_next_init(struct ldb_module *module);
 236
 237 void ldb_set_errstring(struct ldb_context *ldb, const char *err_string);
 238 void ldb_asprintf_errstring(struct ldb_context *ldb, const char *format, ...) PRINTF_ATTRIBUTE(2,3);
 239 void ldb_reset_err_string(struct ldb_context *ldb);
 240
 241 const char *ldb_default_modules_dir(void);
 242
 243 int ldb_register_module(const struct ldb_module_ops *);
 244
 245 typedef int (*ldb_connect_fn)(struct ldb_context *ldb, const char *url,
 246                               unsigned int flags, const char *options[],
 247                               struct ldb_module **module);
 248
 249 struct ldb_backend_ops {
 250         const char *name;
 251         ldb_connect_fn connect_fn;
 252 };
 253
 254 const char *ldb_default_modules_dir(void);
 255
 256 int ldb_register_backend(const char *url_prefix, ldb_connect_fn);
 257
 258 void *ldb_dso_load_symbol(struct ldb_context *ldb, const char *name,
 259                             const char *symbol);
 260
 261 struct ldb_handle *ldb_handle_new(TALLOC_CTX *mem_ctx, struct ldb_context *ldb);
 262
 263 int ldb_module_send_entry(struct ldb_request *req,
 264                           struct ldb_message *msg);
 265
 266 int ldb_module_send_referral(struct ldb_request *req,
 267                                            char *ref);
 268
 269 int ldb_module_done(struct ldb_request *req,
 270                     struct ldb_control **ctrls,
 271                     struct ldb_extended *response,
 272                     int error);
 273
 274 int ldb_mod_register_control(struct ldb_module *module, const char *oid);
 275
 276 #endif