r14344: More helpful messages on error for command line specified controls

fixes in paged_results
asq -> async
(This used to be commit fbd347544001da9e46246eb0b4a8d165ccab15c9)

1 files changed, 377 insertions, 11 deletions

diff --git a/source4/lib/ldb/modules/asq.c b/source4/lib/ldb/modules/asq.c
index 33ba9bed04..1449ece975 100644
--- a/source4/lib/ldb/modules/asq.c
+++ b/source4/lib/ldb/modules/asq.c
@@ -77,9 +77,8 @@ static int build_response(struct ldb_result *res, int result)
 }
 
 /* search */
-static int asq_search(struct ldb_module *module, struct ldb_request *req)
+static int asq_search(struct ldb_module *module, struct ldb_control *control, struct ldb_request *req)
 {
-	struct ldb_control *control;
 	struct ldb_asq_control *asq_ctrl;
 	struct ldb_request *base_req;
 	struct ldb_message_element *el;
@@ -87,13 +86,6 @@ static int asq_search(struct ldb_module *module, struct ldb_request *req)
 	char **base_attrs;
 	int i, c, ret;
 
-	/* check if there's a paged request control */
-	control = get_control_from_list(req->controls, LDB_CONTROL_ASQ_OID);
-	if (control == NULL) {
-		/* not found go on */
-		return ldb_next_request(module, req);
-	}
-
 	/* pre-allocate a clean result structure */
 	req->op.search.res = res = talloc_zero(req, struct ldb_result);
 	if (res == NULL)
@@ -197,15 +189,388 @@ static int asq_search(struct ldb_module *module, struct ldb_request *req)
 	return build_response(res, ASQ_CTRL_SUCCESS);
 }
 
+struct asq_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 *req_attrs;
+	char *req_attribute;
+	int asq_ret;
+
+	struct ldb_request *base_req;
+	struct ldb_async_result *base_res;
+
+	struct ldb_request **reqs;
+	int num_reqs;
+	int cur_req;
+
+	struct ldb_control **controls;
+};
+
+static struct ldb_async_handle *init_handle(void *mem_ctx, struct ldb_module *module,
+					    void *context,
+					    int (*callback)(struct ldb_context *, void *, struct ldb_async_result *),
+					    int timeout)
+{
+	struct asq_async_context *ac;
+	struct ldb_async_handle *h;
+
+	h = talloc_zero(mem_ctx, struct ldb_async_handle);
+	if (h == NULL) {
+		ldb_set_errstring(module->ldb, talloc_asprintf(module, "Out of Memory"));
+		return NULL;
+	}
+
+	h->module = module;
+
+	ac = talloc_zero(h, struct asq_async_context);
+	if (ac == NULL) {
+		ldb_set_errstring(module->ldb, talloc_asprintf(module, "Out of Memory"));
+		talloc_free(h);
+		return NULL;
+	}
+
+	h->private_data = (void *)ac;
+
+	h->state = LDB_ASYNC_INIT;
+	h->status = LDB_SUCCESS;
+
+	ac->module = module;
+	ac->up_context = context;
+	ac->up_callback = callback;
+	ac->timeout = timeout;
+
+	return h;
+}
+
+static int asq_terminate(struct ldb_async_handle *handle)
+{
+	struct asq_async_context *ac;
+	struct ldb_async_result *ares;
+	struct ldb_asq_control *asq;
+	int i;
+
+	ac = talloc_get_type(handle->private_data, struct asq_async_context);
+
+	handle->status = LDB_SUCCESS;
+	handle->state = LDB_ASYNC_DONE;
+
+	ares = talloc_zero(ac, struct ldb_async_result);
+	if (ares == NULL)
+		return LDB_ERR_OPERATIONS_ERROR;
+
+	ares->type = LDB_REPLY_DONE;
+
+	if (ac->controls) {
+		for (i = 0; ac->controls[i]; i++);
+		ares->controls = talloc_steal(ares, ac->controls);
+	} else {
+		i = 0;
+	}
+
+	ares->controls = talloc_realloc(ares, ares->controls, struct ldb_control *, i + 2);
+	
+	if (ares->controls == NULL)
+		return LDB_ERR_OPERATIONS_ERROR;
+
+	ares->controls[i] = talloc(ares->controls, struct ldb_control);
+	if (ares->controls[i] == NULL)
+		return LDB_ERR_OPERATIONS_ERROR;
+
+	ares->controls[i]->oid = LDB_CONTROL_ASQ_OID;
+	ares->controls[i]->critical = 0;
+
+	asq = talloc_zero(ares->controls[i], struct ldb_asq_control);
+	if (asq == NULL)
+		return LDB_ERR_OPERATIONS_ERROR;
+
+	asq->result = ac->asq_ret;
+	
+	ares->controls[i]->data = asq;
+
+	ares->controls[i + 1] = NULL;
+
+	ac->up_callback(ac->module->ldb, ac->up_context, ares);
+
+	return LDB_SUCCESS;
+}
+
+static int asq_base_callback(struct ldb_context *ldb, void *context, struct ldb_async_result *ares)
+{
+	struct asq_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 asq_async_context);
+
+	/* we are interested only in the single reply (base search) we receive here */
+	if (ares->type == LDB_REPLY_ENTRY) {
+		ac->base_res = talloc_steal(ac, ares);
+	} else {
+		talloc_free(ares);
+	}
+
+	return LDB_SUCCESS;
+error:
+	talloc_free(ares);
+	return LDB_ERR_OPERATIONS_ERROR;
+}
+
+static int asq_reqs_callback(struct ldb_context *ldb, void *context, struct ldb_async_result *ares)
+{
+	struct asq_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 asq_async_context);
+
+	/* we are interested only in the single reply (base search) we receive here */
+	if (ares->type == LDB_REPLY_ENTRY) {
+
+		/* pass the message up to the original callback as we
+		 * do not have to elaborate on it any further */
+		return ac->up_callback(ac->module->ldb, ac->up_context, ares);
+		
+	} else { /* ignore any REFERRAL or DONE reply */
+		talloc_free(ares);
+	}
+
+	return LDB_SUCCESS;
+error:
+	talloc_free(ares);
+	return LDB_ERR_OPERATIONS_ERROR;
+}
+
+static int asq_search_async(struct ldb_module *module, struct ldb_control *control, struct ldb_request *req)
+{
+	struct ldb_asq_control *asq_ctrl;
+	struct asq_async_context *ac;
+	struct ldb_async_handle *h;
+	char **base_attrs;
+	int ret;
+
+	req->async.handle = NULL;
+
+	if (!req->async.callback || !req->async.context) {
+		ldb_set_errstring(module->ldb, talloc_asprintf(module,
+				  "Async interface called with NULL callback function or NULL context"));
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+	
+	asq_ctrl = talloc_get_type(control->data, struct ldb_asq_control);
+	if (!asq_ctrl) {
+		return LDB_ERR_PROTOCOL_ERROR;
+	}
+
+	h = init_handle(req, module, req->async.context, req->async.callback, req->async.timeout);
+	if (!h) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+	ac = talloc_get_type(h->private_data, struct asq_async_context);
+
+	req->async.handle = h;
+
+	/* check the search is well formed */
+	if (req->op.search.scope != LDB_SCOPE_BASE) {
+		ac->asq_ret = ASQ_CTRL_UNWILLING_TO_PERFORM;
+		return asq_terminate(h);
+	}
+
+	ac->req_attrs = req->op.search.attrs;
+	ac->req_attribute = talloc_strdup(ac, asq_ctrl->source_attribute);
+	if (ac->req_attribute == NULL)
+		return LDB_ERR_OPERATIONS_ERROR;
+
+	/* get the object to retrieve the DNs to search */
+	ac->base_req = talloc_zero(req, struct ldb_request);
+	if (ac->base_req == NULL)
+		return LDB_ERR_OPERATIONS_ERROR;
+	ac->base_req->operation = req->operation;
+	ac->base_req->op.search.base = req->op.search.base;
+	ac->base_req->op.search.scope = LDB_SCOPE_BASE;
+	ac->base_req->op.search.tree = req->op.search.tree;
+	base_attrs = talloc_array(ac->base_req, char *, 2);
+	if (base_attrs == NULL)
+		return LDB_ERR_OPERATIONS_ERROR;
+	base_attrs[0] = talloc_strdup(base_attrs, asq_ctrl->source_attribute);
+	if (base_attrs[0] == NULL)
+		return LDB_ERR_OPERATIONS_ERROR;
+	base_attrs[1] = NULL;
+	ac->base_req->op.search.attrs = (const char * const *)base_attrs;
+	ac->base_req->creds = req->creds;
+
+	ac->base_req->async.context = ac;
+	ac->base_req->async.callback = asq_base_callback;
+	ac->base_req->async.timeout = req->async.timeout;
+
+	ret = ldb_request(module->ldb, ac->base_req);
+
+	if (ret != LDB_SUCCESS) {
+		return ret;
+	}
+
+	return LDB_SUCCESS;
+}
+
+static int asq_async_requests(struct ldb_async_handle *handle) {
+	struct asq_async_context *ac;
+	struct ldb_message_element *el;
+	int i;
+
+	ac = talloc_get_type(handle->private_data, struct asq_async_context);
+
+	/* look up the DNs */
+	el = ldb_msg_find_element(ac->base_res->message, ac->req_attribute);
+	/* no values found */
+	if (el == NULL) {
+		ac->asq_ret = ASQ_CTRL_SUCCESS;
+		return asq_terminate(handle);
+	}
+
+	/* build up the requests call chain */
+	ac->num_reqs = el->num_values;
+	ac->cur_req = 0;
+	ac->reqs = talloc_array(ac, struct ldb_request *, ac->num_reqs);
+	if (ac->reqs == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	for (i = 0; i < el->num_values; i++) {
+
+		ac->reqs[i] = talloc_zero(ac->reqs, struct ldb_request);
+		if (ac->reqs[i] == NULL)
+			return LDB_ERR_OPERATIONS_ERROR;
+		ac->reqs[i]->operation = LDB_ASYNC_SEARCH;
+		ac->reqs[i]->op.search.base = ldb_dn_explode(ac->reqs[i], (const char *)el->values[i].data);
+		if (ac->reqs[i]->op.search.base == NULL) {
+			ac->asq_ret = ASQ_CTRL_INVALID_ATTRIBUTE_SYNTAX;
+			return asq_terminate(handle);
+		}
+		ac->reqs[i]->op.search.scope = LDB_SCOPE_BASE;
+		ac->reqs[i]->op.search.tree = ac->base_req->op.search.tree;
+		ac->reqs[i]->op.search.attrs = ac->req_attrs;
+		ac->reqs[i]->creds = ac->base_req->creds;
+
+		ac->reqs[i]->async.context = ac;
+		ac->reqs[i]->async.callback = asq_reqs_callback;
+		ac->reqs[i]->async.timeout = ac->base_req->async.timeout;
+	}
+
+	return LDB_SUCCESS;
+}
+
+static int asq_async_wait(struct ldb_async_handle *handle, enum ldb_async_wait_type type)
+{
+	struct asq_async_context *ac;
+	int ret;
+    
+	if (!handle || !handle->private_data) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	if (handle->state == LDB_ASYNC_DONE) {
+		return handle->status;
+	}
+
+	handle->state = LDB_ASYNC_PENDING;
+
+	ac = talloc_get_type(handle->private_data, struct asq_async_context);
+
+	if (type == LDB_WAIT_ALL) {
+		while (ac->base_req->async.handle->state != LDB_ASYNC_DONE) {
+			ret = ldb_async_wait(ac->base_req->async.handle, type);
+			if (ret != LDB_SUCCESS) goto error;
+		}
+
+		ret = asq_async_requests(handle);
+		if (ret != LDB_SUCCESS) goto error;
+
+		for (; ac->cur_req < ac->num_reqs; ac->cur_req++) {
+			ret = ldb_request(ac->module->ldb, ac->reqs[ac->cur_req]);
+			if (ret != LDB_SUCCESS) goto error;
+
+			while (ac->reqs[ac->cur_req]->async.handle->state != LDB_ASYNC_DONE) {
+				ret = ldb_async_wait(ac->reqs[ac->cur_req]->async.handle, type);
+				if (ret != LDB_SUCCESS) goto error;
+			}
+		}
+
+		return asq_terminate(handle);
+	}
+
+	/* type == LDB_WAIT_NONE */
+
+	if (ac->base_req->async.handle->state != LDB_ASYNC_DONE) {
+		ret = ldb_async_wait(ac->base_req->async.handle, type);
+		if (ret != LDB_SUCCESS) goto error;
+
+		if (ac->base_req->async.handle->state != LDB_ASYNC_DONE) {
+			return ret;
+		}
+	}
+
+	if (ac->reqs == NULL) {
+		/* need to build up the reqs array before calling out */
+		ret = asq_async_requests(handle);
+		if (ret != LDB_SUCCESS) goto error;
+	}
+
+	if (ac->cur_req < ac->num_reqs) {
+
+		if (ac->reqs[ac->cur_req]->async.handle == NULL) {
+			ret = ldb_request(ac->module->ldb, ac->reqs[ac->cur_req]);
+			if (ret != LDB_SUCCESS) goto error;
+		}
+
+		if (ac->reqs[ac->cur_req]->async.handle->state != LDB_ASYNC_DONE) {
+			ret = ldb_async_wait(ac->reqs[ac->cur_req]->async.handle, type);
+			if (ret != LDB_SUCCESS) goto error;
+		}
+
+		if (ac->reqs[ac->cur_req]->async.handle->state == LDB_ASYNC_DONE) {
+			ac->cur_req++;
+		}
+
+		return handle->status;
+	}
+
+	return asq_terminate(handle);
+
+error:
+	handle->state = LDB_ASYNC_DONE;
+	handle->status = ret;
+	return ret;
+}
+
 static int asq(struct ldb_module *module, struct ldb_request *req)
 {
+	struct ldb_control *control;
+
+	/* check if there's a paged request control */
+	control = get_control_from_list(req->controls, LDB_CONTROL_ASQ_OID);
+	if (control == NULL) {
+		/* not found go on */
+		return ldb_next_request(module, req);
+	}
+
 	switch (req->operation) {
 
 	case LDB_REQ_SEARCH:
-		return asq_search(module, req);
+		return asq_search(module, control, req);
+	
+	case LDB_ASYNC_SEARCH:
+		return asq_search_async(module, control, req);
 
 	default:
-		return ldb_next_request(module, req);
+		return LDB_ERR_PROTOCOL_ERROR;
 
 	}
 }
@@ -232,6 +597,7 @@ static int asq_init(struct ldb_module *module)
 static const struct ldb_module_ops asq_ops = {
 	.name		   = "asq",
 	.request      	   = asq,
+	.async_wait        = asq_async_wait,
 	.init_context	   = asq_init
 };