diff options
Diffstat (limited to 'source3/lib/ldb/common/ldb_attributes.c')
| -rw-r--r-- | source3/lib/ldb/common/ldb_attributes.c | 308 |
1 files changed, 308 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..5ecbdc7940 --- /dev/null +++ b/source3/lib/ldb/common/ldb_attributes.c @@ -0,0 +1,308 @@ +/* + 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 3 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, see <http://www.gnu.org/licenses/>. +*/ +/* + 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) +{ + int i; + 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); + for (i=0;i<num_handlers;i++) { + if (h[ldb->schema.num_attrib_handlers+i].flags & LDB_ATTR_FLAG_ALLOCATED) { + h[ldb->schema.num_attrib_handlers+i].attr = talloc_strdup(ldb->schema.attrib_handlers, + h[ldb->schema.num_attrib_handlers+i].attr); + if (h[ldb->schema.num_attrib_handlers+i].attr == NULL) { + ldb_oom(ldb); + return -1; + } + } + } + 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; + } + if (h->flags & LDB_ATTR_FLAG_ALLOCATED) { + talloc_free(discard_const_p(char, h->attr)); + } + 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; + } +} |