r15942: Remove the sync internal ldb calls altogether.
[jelmer/samba4-debian.git] / source / dsdb / samdb / ldb_modules / rootdse.c
index 68de8c884c20e958b4a8ddb5d901065d6c0564ef..46b34a469ba492fd09082ce1e5b07cd95cb75d09 100644 (file)
@@ -26,7 +26,7 @@
 #include "lib/ldb/include/ldb_errors.h"
 #include "lib/ldb/include/ldb_private.h"
 #include "auth/gensec/gensec.h"
-#include <time.h>
+#include "system/time.h"
 
 struct private_data {
        int num_controls;
@@ -43,38 +43,36 @@ static int do_attribute(const char * const *attrs, const char *name)
                ldb_attr_in_list(attrs, "*");
 }
 
+
 /*
   add dynamically generated attributes to rootDSE result
 */
-static int rootdse_add_dynamic(struct ldb_module *module, struct ldb_request *req)
+static int rootdse_add_dynamic(struct ldb_module *module, struct ldb_message *msg, const char * const *attrs)
 {
        struct private_data *priv = talloc_get_type(module->private_data, struct private_data);
-       struct ldb_search *s = &req->op.search;
-       struct ldb_message *msg;
        struct cli_credentials *server_creds;
 
-       /* this is gross, and will be removed when I change ldb_result not
-          to be so pointer crazy :-) */
-       if (s->res->msgs == NULL) {
-               return LDB_SUCCESS;
-       }
-
-       msg = s->res->msgs[0];
-
        msg->dn = ldb_dn_explode(msg, "");
 
-       if (do_attribute(s->attrs, "currentTime")) {
-               if (ldb_msg_add_string(msg, "currentTime", 
-                                      ldb_timestring(msg, time(NULL))) != 0) {
+       /* don't return the distinduishedName attribute if any */
+       ldb_msg_remove_attr(msg, "distinguishedName");
+
+       if (do_attribute(attrs, "currentTime")) {
+               if (ldb_msg_add_steal_string(msg, "currentTime", 
+                                            ldb_timestring(msg, time(NULL))) != 0) {
                        goto failed;
                }
        }
 
-       if (do_attribute(s->attrs, "supportedControl")) {
+       if (do_attribute(attrs, "supportedControl")) {
                int i;
                for (i = 0; i < priv->num_controls; i++) {
-                       if (ldb_msg_add_string(msg, "supportedControl",
-                                               priv->controls[i]) != 0) {
+                       char *control = talloc_strdup(msg, priv->controls[i]);
+                       if (!control) {
+                               goto failed;
+                       }
+                       if (ldb_msg_add_steal_string(msg, "supportedControl",
+                                                    control) != 0) {
                                goto failed;
                        }
                }
@@ -82,26 +80,38 @@ static int rootdse_add_dynamic(struct ldb_module *module, struct ldb_request *re
 
        server_creds = talloc_get_type(ldb_get_opaque(module->ldb, "server_credentials"), 
                                       struct cli_credentials);
-       if (do_attribute(s->attrs, "supportedSASLMechanisms")) {
-               const struct gensec_security_ops **ops = cli_credentials_gensec_list(server_creds);
+       if (server_creds && do_attribute(attrs, "supportedSASLMechanisms")) {
+               struct gensec_security_ops **backends = gensec_security_all();
+               enum credentials_use_kerberos use_kerberos
+                       = cli_credentials_get_kerberos_state(server_creds);
+               struct gensec_security_ops **ops
+                       = gensec_use_kerberos_mechs(msg, backends, use_kerberos);
                int i;
                for (i = 0; ops && ops[i]; i++) {
                        if (ops[i]->sasl_name) {
-                               const char *sasl_name = talloc_strdup(msg, ops[i]->sasl_name);
+                               char *sasl_name = talloc_strdup(msg, ops[i]->sasl_name);
                                if (!sasl_name) {
                                        goto failed;
                                }
-                               if (ldb_msg_add_string(msg, "supportedSASLMechanisms",
-                                                      sasl_name) != 0) {
+                               if (ldb_msg_add_steal_string(msg, "supportedSASLMechanisms",
+                                                            sasl_name) != 0) {
                                        goto failed;
                                }
                        }
                }
        }
+
+       if (do_attribute(attrs, "highestCommittedUSN")) {
+               if (module->ldb->sequence_number != NULL && 
+                   ldb_msg_add_fmt(msg, "highestCommittedUSN", 
+                                   "%llu", module->ldb->sequence_number(module->ldb)) != 0) {
+                       goto failed;
+               }
+       }
        
        /* TODO: lots more dynamic attributes should be added here */
 
-       return 0;
+       return LDB_SUCCESS;
 
 failed:
        return LDB_ERR_OPERATIONS_ERROR;
@@ -110,40 +120,96 @@ failed:
 /*
   handle search requests
 */
-static int rootdse_search_bytree(struct ldb_module *module, struct ldb_request *req)
+
+struct rootdse_async_context {
+       struct ldb_module *module;
+       void *up_context;
+       int (*up_callback)(struct ldb_context *, void *, struct ldb_async_result *);
+       int timeout;
+
+       const char * const * attrs;
+};
+
+static int rootdse_async_callback(struct ldb_context *ldb, void *context, struct ldb_async_result *ares)
+{
+       struct rootdse_async_context *ac;
+
+       if (!context || !ares) {
+               ldb_set_errstring(ldb, talloc_asprintf(ldb, "NULL Context or Result in callback"));
+               goto error;
+       }
+
+       ac = talloc_get_type(context, struct rootdse_async_context);
+
+       if (ares->type == LDB_REPLY_ENTRY) {
+               /* for each record returned post-process to add any dynamic
+                  attributes that have been asked for */
+               if (rootdse_add_dynamic(ac->module, ares->message, ac->attrs) != LDB_SUCCESS) {
+                       goto error;
+               }
+       }
+
+       return ac->up_callback(ldb, ac->up_context, ares);
+
+error:
+       talloc_free(ares);
+       return LDB_ERR_OPERATIONS_ERROR;
+}
+
+static int rootdse_search(struct ldb_module *module, struct ldb_request *req)
 {
-       struct ldb_search *s = &req->op.search;
+       struct rootdse_async_context *ac;
+       struct ldb_request *down_req;
        int ret;
-       TALLOC_CTX *tmp_ctx;
 
        /* see if its for the rootDSE */
-       if (s->scope != LDB_SCOPE_BASE ||
-           (s->base && s->base->comp_num != 0)) {
+       if (req->op.search.scope != LDB_SCOPE_BASE ||
+           (req->op.search.base && req->op.search.base->comp_num != 0)) {
                return ldb_next_request(module, req);
        }
 
-       tmp_ctx = talloc_new(module);
+       ac = talloc(req, struct rootdse_async_context);
+       if (ac == NULL) {
+               return LDB_ERR_OPERATIONS_ERROR;
+       }
+
+       ac->module = module;
+       ac->up_context = req->async.context;
+       ac->up_callback = req->async.callback;
+       ac->timeout = req->async.timeout;
+       ac->attrs = req->op.search.attrs;
+
+       down_req = talloc_zero(req, struct ldb_request);
+       if (down_req == NULL) {
+               return LDB_ERR_OPERATIONS_ERROR;
+       }
 
+       down_req->operation = req->operation;
        /* in our db we store the rootDSE with a DN of cn=rootDSE */
-       s->base = ldb_dn_explode(tmp_ctx, "cn=rootDSE");
-       s->tree = ldb_parse_tree(tmp_ctx, "dn=*");
-       if (s->base == NULL || s->tree == NULL) {
+       down_req->op.search.base = ldb_dn_explode(down_req, "cn=rootDSE");
+       down_req->op.search.scope = LDB_SCOPE_BASE;
+       down_req->op.search.tree = ldb_parse_tree(down_req, "dn=*");
+       if (down_req->op.search.base == NULL || down_req->op.search.tree == NULL) {
                ldb_oom(module->ldb);
-               talloc_free(tmp_ctx);
+               talloc_free(down_req);
                return LDB_ERR_OPERATIONS_ERROR;
        }
+       down_req->op.search.attrs = req->op.search.attrs;
+       down_req->controls = req->controls;
 
-       /* grab the static contents of the record */
-       ret = ldb_next_request(module, req);
+       down_req->async.context = ac;
+       down_req->async.callback = rootdse_async_callback;
+       down_req->async.timeout = req->async.timeout;
 
-       req->op.search.res = s->res;
+       /* perform the search */
+       ret = ldb_next_request(module, down_req);
 
+       /* do not free down_req as the call results may be linked to it,
+        * it will be freed when the upper level request get freed */
        if (ret == LDB_SUCCESS) {
-               ret = rootdse_add_dynamic(module, req);
+               req->async.handle = down_req->async.handle;
        }
 
-       talloc_free(tmp_ctx);
-
        return ret;
 }
 
@@ -172,44 +238,41 @@ static int rootdse_register_control(struct ldb_module *module, struct ldb_reques
 static int rootdse_request(struct ldb_module *module, struct ldb_request *req)
 {
        switch (req->operation) {
-       case LDB_REQ_SEARCH:
-               return rootdse_search_bytree(module, req);
+
        case LDB_REQ_REGISTER:
                return rootdse_register_control(module, req);
+
        default:
                break;
        }
        return ldb_next_request(module, req);
 }
 
-static const struct ldb_module_ops rootdse_ops = {
-       .name           = "rootdse",
-       .request        = rootdse_request
-};
-
-struct ldb_module *rootdse_module_init(struct ldb_context *ldb, const char *options[])
+static int rootdse_init(struct ldb_module *module)
 {
-       struct ldb_module *ctx;
        struct private_data *data;
 
-       ctx = talloc(ldb, struct ldb_module);
-       if (!ctx)
-               return NULL;
-
-       data = talloc(ctx, struct private_data);
+       data = talloc(module, struct private_data);
        if (data == NULL) {
-               talloc_free(ctx);
-               return NULL;
+               return -1;
        }
 
        data->num_controls = 0;
        data->controls = NULL;
-       ctx->private_data = data;
+       module->private_data = data;
 
-       ctx->ldb = ldb;
-       ctx->prev = ctx->next = NULL;
-       ctx->ops = &rootdse_ops;
+       return ldb_next_init(module);
+}
 
-       return ctx;
+static const struct ldb_module_ops rootdse_ops = {
+       .name                   = "rootdse",
+       .init_context           = rootdse_init,
+       .search                 = rootdse_search,
+       .request                = rootdse_request
+};
+
+int rootdse_module_init(void)
+{
+       return ldb_register_module(&rootdse_ops);
 }