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authorAndrew Tridgell <tridge@samba.org>2006-09-24 02:49:04 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 12:14:36 -0500
commit3e2c696e45b24b0192ab7b1ddaf1dd4d79571609 (patch)
tree9c4423bdb006f7c183fea0c87331d23e7043d0b1 /source3/lib/ldb/common/ldb_attributes.c
parent0c3194816b513e3743ddcacd1eca2b683ca39b88 (diff)
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r18866: Jeremy and Volker have given the go-ahead on the group mapping ldb
code. Yay! This first commit copies lib/ldb/ from Samba4. A huge congratulations should go to Simo on this - he has put an enormous amount of work into ldb, and it's great to see it go into the Samba3 tree. (This used to be commit bbedf2e34315f5c420a3a05dfe22b1d5cf79f042)
Diffstat (limited to 'source3/lib/ldb/common/ldb_attributes.c')
-rw-r--r--source3/lib/ldb/common/ldb_attributes.c295
1 files changed, 295 insertions, 0 deletions
diff --git a/source3/lib/ldb/common/ldb_attributes.c b/source3/lib/ldb/common/ldb_attributes.c
new file mode 100644
index 0000000000..c8a7909b4c
--- /dev/null
+++ b/source3/lib/ldb/common/ldb_attributes.c
@@ -0,0 +1,295 @@
+/*
+ ldb database library
+
+ Copyright (C) Andrew Tridgell 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
+*/
+/*
+ register handlers for specific attributes and objectclass relationships
+
+ this allows a backend to store its schema information in any format
+ it likes (or to not have any schema information at all) while keeping the
+ message matching logic generic
+*/
+
+#include "includes.h"
+#include "ldb/include/includes.h"
+
+/*
+ add to the list of ldif handlers for this ldb context
+*/
+int ldb_set_attrib_handlers(struct ldb_context *ldb,
+ const struct ldb_attrib_handler *handlers,
+ unsigned num_handlers)
+{
+ struct ldb_attrib_handler *h;
+ h = talloc_realloc(ldb, ldb->schema.attrib_handlers,
+ struct ldb_attrib_handler,
+ ldb->schema.num_attrib_handlers + num_handlers);
+ if (h == NULL) {
+ ldb_oom(ldb);
+ return -1;
+ }
+ ldb->schema.attrib_handlers = h;
+ memcpy(h + ldb->schema.num_attrib_handlers,
+ handlers, sizeof(*h) * num_handlers);
+ ldb->schema.num_attrib_handlers += num_handlers;
+ return 0;
+}
+
+
+/*
+ default function for read/write/canonicalise
+*/
+static int ldb_default_copy(struct ldb_context *ldb,
+ void *mem_ctx,
+ const struct ldb_val *in,
+ struct ldb_val *out)
+{
+ *out = ldb_val_dup(mem_ctx, in);
+
+ if (out->data == NULL && in->data != NULL) {
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ default function for comparison
+*/
+static int ldb_default_cmp(struct ldb_context *ldb,
+ void *mem_ctx,
+ const struct ldb_val *v1,
+ const struct ldb_val *v2)
+{
+ if (v1->length != v2->length) {
+ return v1->length - v2->length;
+ }
+ return memcmp(v1->data, v2->data, v1->length);
+}
+
+/*
+ default handler function pointers
+*/
+static const struct ldb_attrib_handler ldb_default_attrib_handler = {
+ .attr = NULL,
+ .ldif_read_fn = ldb_default_copy,
+ .ldif_write_fn = ldb_default_copy,
+ .canonicalise_fn = ldb_default_copy,
+ .comparison_fn = ldb_default_cmp,
+};
+
+/*
+ return the attribute handlers for a given attribute
+*/
+const struct ldb_attrib_handler *ldb_attrib_handler(struct ldb_context *ldb,
+ const char *attrib)
+{
+ int i;
+ const struct ldb_attrib_handler *def = &ldb_default_attrib_handler;
+ /* TODO: should be replaced with a binary search, with a sort on add */
+ for (i=0;i<ldb->schema.num_attrib_handlers;i++) {
+ if (strcmp(ldb->schema.attrib_handlers[i].attr, "*") == 0) {
+ def = &ldb->schema.attrib_handlers[i];
+ }
+ if (ldb_attr_cmp(attrib, ldb->schema.attrib_handlers[i].attr) == 0) {
+ return &ldb->schema.attrib_handlers[i];
+ }
+ }
+ return def;
+}
+
+
+/*
+ add to the list of ldif handlers for this ldb context
+*/
+void ldb_remove_attrib_handler(struct ldb_context *ldb, const char *attrib)
+{
+ const struct ldb_attrib_handler *h;
+ int i;
+ h = ldb_attrib_handler(ldb, attrib);
+ if (h == &ldb_default_attrib_handler) {
+ return;
+ }
+ i = h - ldb->schema.attrib_handlers;
+ if (i < ldb->schema.num_attrib_handlers - 1) {
+ memmove(&ldb->schema.attrib_handlers[i],
+ h+1, sizeof(*h) * (ldb->schema.num_attrib_handlers-(i+1)));
+ }
+ ldb->schema.num_attrib_handlers--;
+}
+
+/*
+ setup a attribute handler using a standard syntax
+*/
+int ldb_set_attrib_handler_syntax(struct ldb_context *ldb,
+ const char *attr, const char *syntax)
+{
+ const struct ldb_attrib_handler *h = ldb_attrib_handler_syntax(ldb, syntax);
+ struct ldb_attrib_handler h2;
+ if (h == NULL) {
+ ldb_debug(ldb, LDB_DEBUG_ERROR, "Unknown syntax '%s'\n", syntax);
+ return -1;
+ }
+ h2 = *h;
+ h2.attr = attr;
+ return ldb_set_attrib_handlers(ldb, &h2, 1);
+}
+
+/*
+ setup the attribute handles for well known attributes
+*/
+int ldb_setup_wellknown_attributes(struct ldb_context *ldb)
+{
+ const struct {
+ const char *attr;
+ const char *syntax;
+ } wellknown[] = {
+ { "dn", LDB_SYNTAX_DN },
+ { "ncName", LDB_SYNTAX_DN },
+ { "distinguishedName", LDB_SYNTAX_DN },
+ { "cn", LDB_SYNTAX_DIRECTORY_STRING },
+ { "dc", LDB_SYNTAX_DIRECTORY_STRING },
+ { "ou", LDB_SYNTAX_DIRECTORY_STRING },
+ { "objectClass", LDB_SYNTAX_OBJECTCLASS }
+ };
+ int i;
+ for (i=0;i<ARRAY_SIZE(wellknown);i++) {
+ if (ldb_set_attrib_handler_syntax(ldb, wellknown[i].attr,
+ wellknown[i].syntax) != 0) {
+ return -1;
+ }
+ }
+ return 0;
+}
+
+
+/*
+ return the list of subclasses for a class
+*/
+const char **ldb_subclass_list(struct ldb_context *ldb, const char *classname)
+{
+ int i;
+ for (i=0;i<ldb->schema.num_classes;i++) {
+ if (ldb_attr_cmp(classname, ldb->schema.classes[i].name) == 0) {
+ return (const char **)ldb->schema.classes[i].subclasses;
+ }
+ }
+ return NULL;
+}
+
+
+/*
+ add a new subclass
+*/
+static int ldb_subclass_new(struct ldb_context *ldb, const char *classname, const char *subclass)
+{
+ struct ldb_subclass *s, *c;
+ s = talloc_realloc(ldb, ldb->schema.classes, struct ldb_subclass, ldb->schema.num_classes+1);
+ if (s == NULL) goto failed;
+
+ ldb->schema.classes = s;
+ c = &s[ldb->schema.num_classes];
+ c->name = talloc_strdup(s, classname);
+ if (c->name == NULL) goto failed;
+
+ c->subclasses = talloc_array(s, char *, 2);
+ if (c->subclasses == NULL) goto failed;
+
+ c->subclasses[0] = talloc_strdup(c->subclasses, subclass);
+ if (c->subclasses[0] == NULL) goto failed;
+ c->subclasses[1] = NULL;
+
+ ldb->schema.num_classes++;
+
+ return 0;
+failed:
+ ldb_oom(ldb);
+ return -1;
+}
+
+/*
+ add a subclass
+*/
+int ldb_subclass_add(struct ldb_context *ldb, const char *classname, const char *subclass)
+{
+ int i, n;
+ struct ldb_subclass *c;
+ char **s;
+
+ for (i=0;i<ldb->schema.num_classes;i++) {
+ if (ldb_attr_cmp(classname, ldb->schema.classes[i].name) == 0) {
+ break;
+ }
+ }
+ if (i == ldb->schema.num_classes) {
+ return ldb_subclass_new(ldb, classname, subclass);
+ }
+ c = &ldb->schema.classes[i];
+
+ for (n=0;c->subclasses[n];n++) /* noop */;
+
+ s = talloc_realloc(ldb->schema.classes, c->subclasses, char *, n+2);
+ if (s == NULL) {
+ ldb_oom(ldb);
+ return -1;
+ }
+
+ c->subclasses = s;
+ s[n] = talloc_strdup(s, subclass);
+ if (s[n] == NULL) {
+ ldb_oom(ldb);
+ return -1;
+ }
+ s[n+1] = NULL;
+
+ return 0;
+}
+
+/*
+ remove a set of subclasses for a class
+*/
+void ldb_subclass_remove(struct ldb_context *ldb, const char *classname)
+{
+ int i;
+ struct ldb_subclass *c;
+
+ for (i=0;i<ldb->schema.num_classes;i++) {
+ if (ldb_attr_cmp(classname, ldb->schema.classes[i].name) == 0) {
+ break;
+ }
+ }
+ if (i == ldb->schema.num_classes) {
+ return;
+ }
+
+ c = &ldb->schema.classes[i];
+ talloc_free(c->name);
+ talloc_free(c->subclasses);
+ if (ldb->schema.num_classes-(i+1) > 0) {
+ memmove(c, c+1, sizeof(*c) * (ldb->schema.num_classes-(i+1)));
+ }
+ ldb->schema.num_classes--;
+ if (ldb->schema.num_classes == 0) {
+ talloc_free(ldb->schema.classes);
+ ldb->schema.classes = NULL;
+ }
+}