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|
/*
ldb database library
Copyright (C) Derrell Lipman 2005
** 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 sqlite3 backend
*
* Description: core files for SQLITE3 backend
*
* Author: Derrell Lipman (based on Andrew Tridgell's LDAP backend)
*/
#include <stdarg.h>
#include "includes.h"
#include "ldb/include/ldb.h"
#include "ldb/include/ldb_private.h"
#include "ldb/include/ldb_parse.h"
#include "ldb/include/ldb_explode_dn.h"
#include "ldb/ldb_sqlite3/ldb_sqlite3.h"
/*
* Macros used throughout
*/
#ifndef FALSE
# define FALSE (0)
# define TRUE (! FALSE)
#endif
#define QUERY_NOROWS(lsqlite3, bRollbackOnError, sql...) \
do { \
if (query_norows(lsqlite3, sql) != 0) { \
if (bRollbackOnError) { \
query_norows(lsqlite3, \
"ROLLBACK;"); \
} \
return -1; \
} \
} while (0)
#define QUERY_INT(lsqlite3, result_var, bRollbackOnError, sql...) \
do { \
if (query_int(lsqlite3, &result_var, sql) != 0) { \
if (bRollbackOnError) { \
query_norows(lsqlite3, \
"ROLLBACK;"); \
} \
return -1; \
} \
} while (0)
/*
* Forward declarations
*/
static int
lsqlite3_rename(struct ldb_module * module,
const char * olddn,
const char * newdn);
static int
lsqlite3_delete(struct ldb_module *module,
const char *dn);
static int
lsqlite3_search(struct ldb_module * module,
const char * pBaseDN,
enum ldb_scope scope,
const char * pExpression,
const char * const attrs[],
struct ldb_message *** res);
static int
lsqlite3_add(struct ldb_module *module,
const struct ldb_message *msg);
static int
lsqlite3_modify(struct ldb_module *module,
const struct ldb_message *msg);
static int
lsqlite3_lock(struct ldb_module *module,
const char *lockname);
static int
lsqlite3_unlock(struct ldb_module *module,
const char *lockname);
static const char *
lsqlite3_errstring(struct ldb_module *module);
static int
initialize(struct lsqlite3_private *lsqlite3,
const char *url);
static int
destructor(void *p);
static int
query_norows(const struct lsqlite3_private *lsqlite3,
const char *pSql,
...);
static int
query_int(const struct lsqlite3_private * lsqlite3,
long long * pRet,
const char * pSql,
...);
static int case_fold_attr_required(void * hUserData,
char *attr);
static char *
parsetree_to_sql(struct ldb_module *module,
char * hTalloc,
const struct ldb_parse_tree *t);
static char *
parsetree_to_tablelist(struct ldb_module *module,
char * hTalloc,
const struct ldb_parse_tree *t);
static int
new_attr(struct ldb_module * module,
char * pAttrName);
static int
msg_to_sql(struct ldb_module * module,
const struct ldb_message * msg,
long long eid,
int use_flags);
static int
new_dn(struct ldb_module * module,
char * pDN,
long long * pEID);
/*
* Table of operations for the sqlite3 backend
*/
static const struct ldb_module_ops lsqlite3_ops = {
"sqlite",
lsqlite3_search,
lsqlite3_add,
lsqlite3_modify,
lsqlite3_delete,
lsqlite3_rename,
lsqlite3_lock,
lsqlite3_unlock,
lsqlite3_errstring
};
/*
* Public functions
*/
/*
* connect to the database
*/
struct ldb_context *
lsqlite3_connect(const char *url,
unsigned int flags,
const char *options[])
{
int i;
int ret;
struct ldb_context * ldb = NULL;
struct lsqlite3_private * lsqlite3 = NULL;
ldb = talloc(NULL, struct ldb_context);
if (!ldb) {
errno = ENOMEM;
goto failed;
}
lsqlite3 = talloc(ldb, struct lsqlite3_private);
if (!lsqlite3) {
errno = ENOMEM;
goto failed;
}
lsqlite3->sqlite = NULL;
lsqlite3->options = NULL;
lsqlite3->lock_count = 0;
ret = initialize(lsqlite3, url);
if (ret != SQLITE_OK) {
goto failed;
}
talloc_set_destructor(lsqlite3, destructor);
ldb->modules = talloc(ldb, struct ldb_module);
if (!ldb->modules) {
errno = ENOMEM;
goto failed;
}
ldb->modules->ldb = ldb;
ldb->modules->prev = ldb->modules->next = NULL;
ldb->modules->private_data = lsqlite3;
ldb->modules->ops = &lsqlite3_ops;
if (options) {
/*
* take a copy of the options array, so we don't have to rely
* on the caller keeping it around (it might be dynamic)
*/
for (i=0;options[i];i++) ;
lsqlite3->options = talloc_array(lsqlite3, char *, i+1);
if (!lsqlite3->options) {
goto failed;
}
for (i=0;options[i];i++) {
lsqlite3->options[i+1] = NULL;
lsqlite3->options[i] =
talloc_strdup(lsqlite3->options, options[i]);
if (!lsqlite3->options[i]) {
goto failed;
}
}
}
return ldb;
failed:
if (lsqlite3->sqlite != NULL) {
(void) sqlite3_close(lsqlite3->sqlite);
}
talloc_free(ldb);
return NULL;
}
/*
* Interface functions referenced by lsqlite3_ops
*/
/* rename a record */
static int
lsqlite3_rename(struct ldb_module * module,
const char * olddn,
const char * newdn)
{
/* ignore ltdb specials */
if (olddn[0] == '@' ||newdn[0] == '@') {
return 0;
}
#warning "lsqlite3_rename() is not yet supported"
return -1;
}
/* delete a record */
static int
lsqlite3_delete(struct ldb_module *module,
const char *dn)
{
/* ignore ltdb specials */
if (dn[0] == '@') {
return 0;
}
return -1;
}
/* search for matching records */
static int
lsqlite3_search(struct ldb_module * module,
const char * pBaseDN,
enum ldb_scope scope,
const char * pExpression,
const char * const attrs[],
struct ldb_message *** res)
{
long long eid = 0;
char * sql;
char * sql_constraints;
char * table_list;
char * hTalloc;
struct ldb_parse_tree * pTree;
struct lsqlite3_private * lsqlite3 = module->private_data;
if (pBaseDN == NULL) {
pBaseDN = "";
}
/* Begin a transaction */
QUERY_NOROWS(lsqlite3, FALSE, "BEGIN IMMEDIATE;");
/*
* Obtain the eid of the base DN
*/
QUERY_INT(lsqlite3,
eid,
TRUE,
"SELECT eid "
" FROM ldb_attr_dn "
" WHERE attr_value = %Q;",
pBaseDN);
/* Parse the filter expression into a tree we can work with */
if ((pTree = ldb_parse_tree(module->ldb, pExpression)) == NULL) {
return -1;
}
/* Allocate a temporary talloc context */
hTalloc = talloc_new(module->ldb);
/* Move the parse tree to our temporary context */
talloc_steal(hTalloc, pTree);
/* Convert filter into a series of SQL statements (constraints) */
sql_constraints = parsetree_to_sql(module, hTalloc, pTree);
/* Get the list of attribute names to use as our extra table list */
table_list = parsetree_to_tablelist(module, hTalloc, pTree);
switch(scope) {
case LDB_SCOPE_DEFAULT:
case LDB_SCOPE_SUBTREE:
sql = sqlite3_mprintf(
"SELECT entry.entry_data\n"
" FROM ldb_entry AS entry\n"
" WHERE entry.eid IN\n"
" (SELECT DISTINCT ldb_entry.eid\n"
" FROM ldb_entry,\n"
" ldb_descendants,\n"
" %q\n"
" WHERE ldb_descendants.aeid = %lld\n"
" AND ldb_entry.eid = ldb_descendants.deid\n"
" AND ldap_entry.eid IN\n"
"%s"
");",
table_list,
eid,
sql_constraints);
break;
case LDB_SCOPE_BASE:
sql = sqlite3_mprintf(
"SELECT entry.entry_data\n"
" FROM ldb_entry AS entry\n"
" WHERE entry.eid IN\n"
" (SELECT DISTINCT ldb_entry.eid\n"
" FROM %q\n"
" WHERE ldb_entry.eid = %lld\n"
" AND ldb_entry.eid IN\n"
"%s"
");",
table_list,
eid,
sql_constraints);
break;
case LDB_SCOPE_ONELEVEL:
sql = sqlite3_mprintf(
"SELECT entry.entry_data\n"
" FROM ldb_entry AS entry\n"
" WHERE entry.eid IN\n"
" (SELECT DISTINCT ldb_entry.eid\n"
" FROM ldb_entry AS pchild, "
" %q\n"
" WHERE ldb_entry.eid = pchild.eid "
" AND pchild.peid = %lld "
" AND ldb_entry.eid IN\n"
"%s"
");",
table_list,
eid,
sql_constraints);
break;
}
#warning "retrieve and return the result set of the search here"
/* End the transaction */
QUERY_NOROWS(lsqlite3, FALSE, "END TRANSACTION;");
return 0;
}
/* add a record */
static int
lsqlite3_add(struct ldb_module *module,
const struct ldb_message *msg)
{
long long eid;
struct lsqlite3_private * lsqlite3 = module->private_data;
/* ignore ltdb specials */
if (msg->dn[0] == '@') {
return 0;
}
/* Begin a transaction */
QUERY_NOROWS(lsqlite3, FALSE, "BEGIN EXCLUSIVE;");
/*
* Build any portions of the directory tree that don't exist. If the
* final component already exists, it's an error.
*/
if (new_dn(module, msg->dn, &eid) != 0) {
QUERY_NOROWS(lsqlite3, FALSE, "ROLLBACK;");
return -1;
}
/* Add attributes to this new entry */
if (msg_to_sql(module, msg, eid, FALSE) != 0) {
QUERY_NOROWS(lsqlite3, FALSE, "ROLLBACK;");
return -1;
}
/* Everything worked. Commit it! */
QUERY_NOROWS(lsqlite3, TRUE, "COMMIT;");
return 0;
}
/* modify a record */
static int
lsqlite3_modify(struct ldb_module *module,
const struct ldb_message *msg)
{
struct lsqlite3_private * lsqlite3 = module->private_data;
/* ignore ltdb specials */
if (msg->dn[0] == '@') {
return 0;
}
/* Begin a transaction */
QUERY_NOROWS(lsqlite3, FALSE, "BEGIN EXCLUSIVE;");
/* Everything worked. Commit it! */
QUERY_NOROWS(lsqlite3, TRUE, "COMMIT;");
return 0 ;
}
/* obtain a named lock */
static int
lsqlite3_lock(struct ldb_module *module,
const char *lockname)
{
if (lockname == NULL) {
return -1;
}
/* TODO implement a local locking mechanism here */
return 0;
}
/* release a named lock */
static int
lsqlite3_unlock(struct ldb_module *module,
const char *lockname)
{
if (lockname == NULL) {
return -1;
}
/* TODO implement a local locking mechanism here */
return 0;
}
/* return extended error information */
static const char *
lsqlite3_errstring(struct ldb_module *module)
{
struct lsqlite3_private * lsqlite3 = module->private_data;
return sqlite3_errmsg(lsqlite3->sqlite);
}
/*
* Static functions
*/
static int
initialize(struct lsqlite3_private *lsqlite3,
const char *url)
{
int ret;
long long queryInt;
const char * pTail;
sqlite3_stmt * stmt;
const char * schema =
"-- ------------------------------------------------------"
"PRAGMA auto_vacuum=1;"
"-- ------------------------------------------------------"
"BEGIN EXCLUSIVE;"
"-- ------------------------------------------------------"
"CREATE TABLE ldb_info AS"
" SELECT 'LDB' AS database_type,"
" '1.0' AS version;"
"-- ------------------------------------------------------"
"-- Schema"
"/*"
" * The entry table holds the information about an entry. "
" * This table is used to obtain the EID of the entry and to "
" * support scope=one and scope=base. The parent and child"
" * table is included in the entry table since all the other"
" * attributes are dependent on EID."
" */"
"CREATE TABLE ldb_entry"
"("
" -- Unique identifier of this LDB entry"
" eid INTEGER PRIMARY KEY,"
" -- Unique identifier of the parent LDB entry"
" peid INTEGER REFERENCES ldb_entry,"
" -- Distinguished name of this entry"
" dn TEXT,"
" -- Time when the entry was created"
" create_timestamp INTEGER,"
" -- Time when the entry was last modified"
" modify_timestamp INTEGER,"
" -- Attributes of this entry, in the form"
" -- attr\1value\0[attr\1value\0]*\0"
" entry_data TEXT"
");"
"/*"
" * The purpose of the descendant table is to support the"
" * subtree search feature. For each LDB entry with a unique"
" * ID (AEID), this table contains the unique identifiers"
" * (DEID) of the descendant entries."
" *"
" * For evern entry in the directory, a row exists in this"
" * table for each of its ancestors including itself. The "
" * size of the table depends on the depth of each entry. In "
" * the worst case, if all the entries were at the same "
" * depth, the number of rows in the table is O(nm) where "
" * n is the number of nodes in the directory and m is the "
" * depth of the tree. "
" */"
"CREATE TABLE ldb_descendants"
"("
" -- The unique identifier of the ancestor LDB entry"
" aeid INTEGER REFERENCES ldb_entry,"
" -- The unique identifier of the descendant LDB entry"
" deid INTEGER REFERENCES ldb_entry"
");"
"CREATE TABLE ldb_object_classes"
"("
" -- Object classes are inserted into this table to track"
" -- their class hierarchy. 'top' is the top-level class"
" -- of which all other classes are subclasses."
" class_name TEXT PRIMARY KEY,"
" -- tree_key tracks the position of the class in"
" -- the hierarchy"
" tree_key TEXT UNIQUE"
");"
"/*"
" * There is one attribute table per searchable attribute."
" */"
"/*"
"CREATE TABLE ldb_attr_ATTRIBUTE_NAME"
"("
" -- The unique identifier of the LDB entry"
" eid INTEGER REFERENCES ldb_entry,"
" -- Normalized attribute value"
" attr_value TEXT"
");"
"*/"
"-- ------------------------------------------------------"
"-- Indexes"
"-- ------------------------------------------------------"
"-- Triggers"
"CREATE TRIGGER ldb_entry_insert_tr"
" AFTER INSERT"
" ON ldb_entry"
" FOR EACH ROW"
" BEGIN"
" UPDATE ldb_entry"
" SET create_timestamp = strftime('%s', 'now'),"
" modify_timestamp = strftime('%s', 'now')"
" WHERE eid = new.eid;"
" END;"
"CREATE TRIGGER ldb_entry_update_tr"
" AFTER UPDATE"
" ON ldb_entry"
" FOR EACH ROW"
" BEGIN"
" UPDATE ldb_entry"
" SET modify_timestamp = strftime('%s', 'now')"
" WHERE eid = old.eid;"
" END;"
"-- ------------------------------------------------------"
"-- Table initialization"
"/* We need an implicit 'top' level object class */"
"INSERT INTO ldb_attributes (attr_name,"
" parent_tree_key)"
" SELECT 'top', '';"
"-- ------------------------------------------------------"
"COMMIT;"
"-- ------------------------------------------------------"
;
/* Skip protocol indicator of url */
if (strncmp(url, "sqlite://", 9) != 0) {
return SQLITE_MISUSE;
}
/* Update pointer to just after the protocol indicator */
url += 9;
/* Try to open the (possibly empty/non-existent) database */
if ((ret = sqlite3_open(url, &lsqlite3->sqlite)) != SQLITE_OK) {
return ret;
}
/* Begin a transaction */
QUERY_NOROWS(lsqlite3, FALSE, "BEGIN EXCLUSIVE;");
/* Determine if this is a new database. No tables means it is. */
QUERY_INT(lsqlite3,
queryInt,
TRUE,
"SELECT COUNT(*) "
" FROM sqlite_master "
" WHERE type = 'table';");
if (queryInt == 0) {
/*
* Create the database schema
*/
for (pTail = discard_const_p(char, schema); pTail != NULL; ) {
if ((ret = sqlite3_prepare(
lsqlite3->sqlite,
pTail,
-1,
&stmt,
&pTail)) != SQLITE_OK ||
(ret = sqlite3_step(stmt)) != SQLITE_DONE ||
(ret = sqlite3_finalize(stmt)) != SQLITE_OK) {
QUERY_NOROWS(lsqlite3, FALSE, "ROLLBACK;");
(void) sqlite3_close(lsqlite3->sqlite);
return ret;
}
}
} else {
/*
* Ensure that the database we opened is one of ours
*/
if (query_int(lsqlite3,
&queryInt,
"SELECT "
" (SELECT COUNT(*) = 3"
" FROM sqlite_master "
" WHERE type = 'table' "
" AND name IN "
" ("
" 'ldb_entry', "
" 'ldb_descendants', "
" 'ldb_object_classes' "
" ) "
" ) "
" AND "
" (SELECT 1 "
" FROM ldb_info "
" WHERE database_type = 'LDB' "
" AND version = '1.0'"
" );") != 0 ||
queryInt != 1) {
/* It's not one that we created. See ya! */
QUERY_NOROWS(lsqlite3, FALSE, "ROLLBACK;");
(void) sqlite3_close(lsqlite3->sqlite);
return SQLITE_MISUSE;
}
}
/* Commit the transaction */
QUERY_NOROWS(lsqlite3, FALSE, "COMMIT;");
return SQLITE_OK;
}
static int
destructor(void *p)
{
struct lsqlite3_private * lsqlite3 = p;
(void) sqlite3_close(lsqlite3->sqlite);
return 0;
}
/*
* query_norows()
*
* This function is used for queries that are not expected to return any rows,
* e.g. BEGIN, COMMIT, ROLLBACK, CREATE TABLE, INSERT, UPDATE, DELETE, etc.
* There are no provisions here for returning data from rows in a table, so do
* not pass SELECT queries to this function.
*/
static int
query_norows(const struct lsqlite3_private *lsqlite3,
const char *pSql,
...)
{
int ret;
int bLoop;
char * p;
const char * pTail;
sqlite3_stmt * pStmt;
va_list args;
/* Begin access to variable argument list */
va_start(args, pSql);
/* Format the query */
if ((p = sqlite3_vmprintf(pSql, args)) == NULL) {
return -1;
}
/*
* Prepare and execute the SQL statement. Loop allows retrying on
* certain errors, e.g. SQLITE_SCHEMA occurs if the schema changes,
* requiring retrying the operation.
*/
for (bLoop = TRUE; bLoop; ) {
/* Compile the SQL statement into sqlite virtual machine */
if ((ret = sqlite3_prepare(lsqlite3->sqlite,
pTail,
-1,
&pStmt,
&pTail)) != SQLITE_OK) {
ret = -1;
break;
}
/* No rows expected, so just step through machine code once */
if ((ret = sqlite3_step(pStmt)) == SQLITE_SCHEMA) {
(void) sqlite3_finalize(pStmt);
continue;
} else if (ret != SQLITE_DONE) {
(void) sqlite3_finalize(pStmt);
ret = -1;
break;
}
/* Free the virtual machine */
if ((ret = sqlite3_finalize(pStmt)) == SQLITE_SCHEMA) {
(void) sqlite3_finalize(pStmt);
continue;
} else if (ret != SQLITE_OK) {
(void) sqlite3_finalize(pStmt);
ret = -1;
break;
}
/*
* Normal condition is only one time through loop. Loop is
* rerun in error conditions, via "continue", above.
*/
ret = 0;
bLoop = FALSE;
}
/* All done with variable argument list */
va_end(args);
/* Free the memory we allocated for our query string */
sqlite3_free(p);
return ret;
}
/*
* query_int()
*
* This function is used for the common case of queries that return a single
* integer value.
*
* NOTE: If more than one value is returned by the query, all but the first
* one will be ignored.
*/
static int
query_int(const struct lsqlite3_private * lsqlite3,
long long * pRet,
const char * pSql,
...)
{
int ret;
int bLoop;
char * p;
const char * pTail;
sqlite3_stmt * pStmt;
va_list args;
/* Begin access to variable argument list */
va_start(args, pSql);
/* Format the query */
if ((p = sqlite3_vmprintf(pSql, args)) == NULL) {
return -1;
}
/*
* Prepare and execute the SQL statement. Loop allows retrying on
* certain errors, e.g. SQLITE_SCHEMA occurs if the schema changes,
* requiring retrying the operation.
*/
for (bLoop = TRUE; bLoop; ) {
/* Compile the SQL statement into sqlite virtual machine */
if ((ret = sqlite3_prepare(lsqlite3->sqlite,
pTail,
-1,
&pStmt,
&pTail)) != SQLITE_OK) {
ret = -1;
break;
}
/* No rows expected, so just step through machine code once */
if ((ret = sqlite3_step(pStmt)) == SQLITE_SCHEMA) {
(void) sqlite3_finalize(pStmt);
continue;
} else if (ret != SQLITE_ROW) {
(void) sqlite3_finalize(pStmt);
ret = -1;
break;
}
/* Get the value to be returned */
*pRet = sqlite3_column_int64(pStmt, 0);
/* Free the virtual machine */
if ((ret = sqlite3_finalize(pStmt)) == SQLITE_SCHEMA) {
(void) sqlite3_finalize(pStmt);
continue;
} else if (ret != SQLITE_OK) {
(void) sqlite3_finalize(pStmt);
ret = -1;
break;
}
/*
* Normal condition is only one time through loop. Loop is
* rerun in error conditions, via "continue", above.
*/
ret = 0;
bLoop = FALSE;
}
/* All done with variable argument list */
va_end(args);
/* Free the memory we allocated for our query string */
sqlite3_free(p);
return ret;
}
/*
callback function used in call to ldb_dn_fold() for determining whether an
attribute type requires case folding.
*/
static int
case_fold_attr_required(void * hUserData,
char *attr)
{
// struct ldb_module * module = hUserData;
#warning "currently, all attributes require case folding"
return TRUE;
}
/*
* add a single set of ldap message values to a ldb_message
*/
#warning "add_msg_attr() not yet implemented or used"
#if 0
static int
add_msg_attr(struct ldb_context *ldb,
struct ldb_message *msg,
const char *attr,
struct berval **bval)
{
int i;
int count;
struct ldb_message_element * el;
count = ldap_count_values_len(bval);
if (count <= 0) {
return -1;
}
el = talloc_realloc(msg, msg->elements, struct ldb_message_element,
msg->num_elements + 1);
if (!el) {
errno = ENOMEM;
return -1;
}
msg->elements = el;
el = &msg->elements[msg->num_elements];
el->name = talloc_strdup(msg->elements, attr);
if (!el->name) {
errno = ENOMEM;
return -1;
}
el->flags = 0;
el->num_values = 0;
el->values = talloc_array(msg->elements, struct ldb_val, count);
if (!el->values) {
errno = ENOMEM;
return -1;
}
for (i=0;i<count;i++) {
el->values[i].data = talloc_memdup(el->values, bval[i]->bv_val, bval[i]->bv_len);
if (!el->values[i].data) {
return -1;
}
el->values[i].length = bval[i]->bv_len;
el->num_values++;
}
msg->num_elements++;
return 0;
}
#endif
static char *
parsetree_to_sql(struct ldb_module *module,
char * hTalloc,
const struct ldb_parse_tree *t)
{
int i;
char * child;
char * p;
char * ret = NULL;
char * pAttrName;
switch(t->operation) {
case LDB_OP_SIMPLE:
break;
case LDB_OP_AND:
ret = parsetree_to_sql(module,
hTalloc,
t->u.list.elements[0]);
for (i = 1; i < t->u.list.num_elements; i++) {
child =
parsetree_to_sql(
module,
hTalloc,
t->u.list.elements[i]);
ret = talloc_asprintf_append(ret,
"INTERSECT\n"
"%s\n",
child);
talloc_free(child);
}
child = ret;
ret = talloc_asprintf("(\n"
"%s\n"
")\n",
child);
talloc_free(child);
return ret;
case LDB_OP_OR:
child =
parsetree_to_sql(
module,
hTalloc,
t->u.list.elements[0]);
for (i = 1; i < t->u.list.num_elements; i++) {
child =
parsetree_to_sql(
module,
hTalloc,
t->u.list.elements[i]);
ret = talloc_asprintf_append(ret,
"UNION\n"
"%s\n",
child);
talloc_free(child);
}
child = ret;
ret = talloc_asprintf("(\n"
"%s\n"
")\n",
child);
talloc_free(child);
return ret;
case LDB_OP_NOT:
child =
parsetree_to_sql(
module,
hTalloc,
t->u.not.child);
ret = talloc_asprintf(hTalloc,
"(\n"
" SELECT eid\n"
" FROM ldb_entry\n"
" WHERE eid NOT IN %s\n"
")\n",
child);
talloc_free(child);
return ret;
default:
/* should never occur */
abort();
};
/* Get a case-folded copy of the attribute name */
pAttrName = ldb_casefold((struct ldb_context *) module,
t->u.simple.attr);
/*
* For simple searches, we want to retrieve the list of EIDs that
* match the criteria. We accomplish this by searching the
* appropriate table, ldb_attr_<attributeName>, for the eid
* corresponding to all matching values.
*/
if (t->u.simple.value.length == 1 &&
(*(const char *) t->u.simple.value.data) == '*') {
/*
* Special case for "attr_name=*". In this case, we want the
* eid corresponding to all values in the specified attribute
* table.
*/
if ((p = sqlite3_mprintf("(\n"
" SELECT eid\n"
" FROM ldb_attr_%q\n"
")\n",
pAttrName)) == NULL) {
return NULL;
}
ret = talloc_strdup(hTalloc, p);
sqlite3_free(p);
} else if (strcasecmp(t->u.simple.attr, "objectclass") == 0) {
/*
* For object classes, we want to search for all objectclasses
* that are subclasses as well.
*/
if ((p = sqlite3_mprintf(
"(\n"
" SELECT eid\n"
" FROM ldb_attr_objectclass\n"
" WHERE attr_name IN\n"
" (SELECT class_name\n"
" FROM ldb_objectclasses\n"
" WHERE tree_key GLOB\n"
" (SELECT tree_key\n"
" FROM ldb_objectclasses\n"
" WHERE class_name = %Q) || '*')\n"
")\n",
t->u.simple.value.data)) == NULL) {
return NULL;
}
ret = talloc_strdup(hTalloc, p);
sqlite3_free(p);
} else {
/* A normal query. */
if ((p = sqlite3_mprintf("(\n"
" SELECT eid\n"
" FROM ldb_attr_%q\n"
" WHERE attr_value = %Q\n"
")\n",
pAttrName,
t->u.simple.value.data)) == NULL) {
return NULL;
}
ret = talloc_strdup(hTalloc, p);
sqlite3_free(p);
}
return ret;
}
static char *
parsetree_to_tablelist(struct ldb_module *module,
char * hTalloc,
const struct ldb_parse_tree *t)
{
#warning "obtain talloc'ed array of attribute names for table list"
return NULL;
}
static int
new_attr(struct ldb_module * module,
char * pAttrName)
{
struct lsqlite3_private * lsqlite3 = module->private_data;
/* NOTE: pAttrName is assumed to already be case-folded here! */
QUERY_NOROWS(lsqlite3,
FALSE,
"CREATE TABLE ldb_attr_%q "
"("
" eid INTEGER REFERENCES ldb_entry, "
" attr_value TEXT"
");",
pAttrName);
return 0;
}
/*
* Issue a series of SQL statements to implement the ADD/MODIFY/DELETE
* requests in the ldb_message
*/
static int
msg_to_sql(struct ldb_module * module,
const struct ldb_message * msg,
long long eid,
int use_flags)
{
int flags;
char * pAttrName;
unsigned int i;
unsigned int j;
struct lsqlite3_private * lsqlite3 = module->private_data;
for (i = 0; i < msg->num_elements; i++) {
const struct ldb_message_element *el = &msg->elements[i];
if (! use_flags) {
flags = LDB_FLAG_MOD_ADD;
} else {
flags = el->flags & LDB_FLAG_MOD_MASK;
}
/* Get a case-folded copy of the attribute name */
pAttrName = ldb_casefold((struct ldb_context *) module,
el->name);
if (flags == LDB_FLAG_MOD_ADD) {
/* Create the attribute table if it doesn't exist */
if (new_attr(module, pAttrName) != 0) {
return -1;
}
}
/* For each value of the specified attribute name... */
for (j = 0; j < el->num_values; j++) {
/* ... bind the attribute value, if necessary */
switch (flags) {
case LDB_FLAG_MOD_ADD:
QUERY_NOROWS(lsqlite3,
FALSE,
"INSERT INTO ldb_attr_%q "
" (eid, attr_value) "
" VALUES "
" (%lld, %Q);",
pAttrName,
eid, el->values[j].data);
QUERY_NOROWS(lsqlite3,
FALSE,
"UPDATE ldb_entry "
" SET entry_data = "
" add_attr(entry_data, "
" %Q, %Q) "
" WHERE eid = %lld;",
el->name, el->values[j].data,
eid);
break;
case LDB_FLAG_MOD_REPLACE:
QUERY_NOROWS(lsqlite3,
FALSE,
"UPDATE ldb_attr_%q "
" SET attr_value = %Q "
" WHERE eid = %lld;",
pAttrName,
el->values[j].data,
eid);
QUERY_NOROWS(lsqlite3,
FALSE,
"UPDATE ldb_entry "
" SET entry_data = "
" mod_attr(entry_data, "
" %Q, %Q) "
" WHERE eid = %lld;",
el->name, el->values[j].data,
eid);
break;
case LDB_FLAG_MOD_DELETE:
/* No additional parameters to this query */
QUERY_NOROWS(lsqlite3,
FALSE,
"DELETE FROM ldb_attr_%q "
" WHERE eid = %lld "
" AND attr_value = %Q;",
pAttrName,
eid,
el->values[j].data);
QUERY_NOROWS(lsqlite3,
FALSE,
"UPDATE ldb_entry "
" SET entry_data = "
" del_attr(entry_data, "
" %Q, %Q) "
" WHERE eid = %lld;",
el->name, el->values[j].data,
eid);
break;
}
}
}
return 0;
}
static int
new_dn(struct ldb_module * module,
char * pDN,
long long * pEID)
{
struct ldb_dn * pExplodedDN;
struct ldb_context * ldb = module->ldb;
// struct lsqlite3_private * lsqlite3 = module->private_data;
/* Explode and normalize the DN */
if ((pExplodedDN =
ldb_explode_dn(ldb,
pDN,
ldb,
case_fold_attr_required)) == NULL) {
return -1;
}
#warning "*** new_dn() not yet fully implemented ***"
return -1;
}
|