/*
This file is part of GNUnet.
- (C) 2012-2014 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2012-2016 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
* @file set/set_api.c
* @brief api for the set service
* @author Florian Dold
+ * @author Christian Grothoff
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_protocols.h"
-#include "gnunet_client_lib.h"
#include "gnunet_set_service.h"
#include "set.h"
#define LOG(kind,...) GNUNET_log_from (kind, "set-api",__VA_ARGS__)
+struct SetCopyRequest
+{
+ struct SetCopyRequest *next;
+
+ struct SetCopyRequest *prev;
+
+ void *cls;
+
+ GNUNET_SET_CopyReadyCallback cb;
+};
+
/**
* Opaque handle to a set.
*/
struct GNUNET_SET_Handle
{
- /**
- * Client connected to the set service.
- */
- struct GNUNET_CLIENT_Connection *client;
-
/**
* Message queue for @e client.
*/
* Has the set become invalid (e.g. service died)?
*/
int invalid;
+
+ /**
+ * Both client and service count the number of iterators
+ * created so far to match replies with iterators.
+ */
+ uint16_t iteration_id;
+
+ /**
+ * Configuration, needed when creating (lazy) copies.
+ */
+ const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+ /**
+ * Doubly linked list of copy requests.
+ */
+ struct SetCopyRequest *copy_req_head;
+
+ /**
+ * Doubly linked list of copy requests.
+ */
+ struct SetCopyRequest *copy_req_tail;
};
*/
struct GNUNET_SET_ListenHandle
{
- /**
- * Connection to the service.
- */
- struct GNUNET_CLIENT_Connection *client;
/**
* Message queue for the client.
/**
* Task for reconnecting when the listener fails.
*/
- GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
+ struct GNUNET_SCHEDULER_Task *reconnect_task;
/**
* Operation we listen for.
};
+/* mutual recursion with handle_copy_lazy */
+static struct GNUNET_SET_Handle *
+create_internal (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ enum GNUNET_SET_OperationType op,
+ const uint32_t *cookie);
+
+
/**
* Handle element for iteration over the set. Notifies the
* iterator and sends an acknowledgement to the service.
*
- * @param cls the set
- * @param mh the message
+ * @param cls the `struct GNUNET_SET_Handle *`
+ * @param msg the message
*/
static void
-handle_iter_element (void *cls,
- const struct GNUNET_MessageHeader *mh)
+handle_copy_lazy (void *cls,
+ const struct GNUNET_SET_CopyLazyResponseMessage *msg)
+{
+ struct GNUNET_SET_Handle *set = cls;
+ struct SetCopyRequest *req;
+ struct GNUNET_SET_Handle *new_set;
+
+ req = set->copy_req_head;
+ if (NULL == req)
+ {
+ /* Service sent us unsolicited lazy copy response */
+ GNUNET_break (0);
+ return;
+ }
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Handling response to lazy copy\n");
+ GNUNET_CONTAINER_DLL_remove (set->copy_req_head,
+ set->copy_req_tail,
+ req);
+ // We pass none as operation here, since it doesn't matter when
+ // cloning.
+ new_set = create_internal (set->cfg,
+ GNUNET_SET_OPERATION_NONE,
+ &msg->cookie);
+ req->cb (req->cls, new_set);
+ GNUNET_free (req);
+}
+
+
+/**
+ * Check that the given @a msg is well-formed.
+ *
+ * @param cls closure
+ * @param msg message to check
+ * @return #GNUNET_OK if message is well-formed
+ */
+static int
+check_iter_element (void *cls,
+ const struct GNUNET_SET_IterResponseMessage *msg)
+{
+ /* minimum size was already checked, everything else is OK! */
+ return GNUNET_OK;
+}
+
+
+/**
+ * Handle element for iteration over the set. Notifies the
+ * iterator and sends an acknowledgement to the service.
+ *
+ * @param cls the `struct GNUNET_SET_Handle *`
+ * @param mh the message
+ */
+ static void
+ handle_iter_element (void *cls,
+ const struct GNUNET_SET_IterResponseMessage *msg)
{
struct GNUNET_SET_Handle *set = cls;
GNUNET_SET_ElementIterator iter = set->iterator;
struct GNUNET_SET_Element element;
- const struct GNUNET_SET_IterResponseMessage *msg;
struct GNUNET_SET_IterAckMessage *ack_msg;
struct GNUNET_MQ_Envelope *ev;
uint16_t msize;
- msize = ntohs (mh->size);
- if (msize < sizeof (sizeof (struct GNUNET_SET_IterResponseMessage)))
+ msize = ntohs (msg->header.size);
+ if (set->iteration_id != ntohs (msg->iteration_id))
{
- /* message malformed */
- GNUNET_break (0);
- set->iterator = NULL;
- iter (set->iterator_cls,
- NULL);
+ /* element from a previous iteration, skip! */
iter = NULL;
}
if (NULL != iter)
{
- msg = (const struct GNUNET_SET_IterResponseMessage *) mh;
element.size = msize - sizeof (struct GNUNET_SET_IterResponseMessage);
- element.element_type = htons (msg->element_type);
+ element.element_type = ntohs (msg->element_type);
element.data = &msg[1];
iter (set->iterator_cls,
&element);
if (NULL == iter)
return;
set->iterator = NULL;
+ set->iteration_id++;
iter (set->iterator_cls,
NULL);
}
+/**
+ * Check that the given @a msg is well-formed.
+ *
+ * @param cls closure
+ * @param msg message to check
+ * @return #GNUNET_OK if message is well-formed
+ */
+static int
+check_result (void *cls,
+ const struct GNUNET_SET_ResultMessage *msg)
+{
+ /* minimum size was already checked, everything else is OK! */
+ return GNUNET_OK;
+}
+
+
/**
* Handle result message for a set operation.
*
*/
static void
handle_result (void *cls,
- const struct GNUNET_MessageHeader *mh)
+ const struct GNUNET_SET_ResultMessage *msg)
{
struct GNUNET_SET_Handle *set = cls;
- const struct GNUNET_SET_ResultMessage *msg;
struct GNUNET_SET_OperationHandle *oh;
struct GNUNET_SET_Element e;
enum GNUNET_SET_Status result_status;
+ int destroy_set;
- msg = (const struct GNUNET_SET_ResultMessage *) mh;
GNUNET_assert (NULL != set->mq);
result_status = ntohs (msg->result_status);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Got result message with status %d\n",
+ result_status);
+
oh = GNUNET_MQ_assoc_get (set->mq,
ntohl (msg->request_id));
if (NULL == oh)
"Ignoring result from canceled operation\n");
return;
}
- if (GNUNET_SET_STATUS_OK != result_status)
+
+ switch (result_status)
{
- /* status is not STATUS_OK => there's no attached element,
- * and this is the last result message we get */
- GNUNET_MQ_assoc_remove (set->mq, ntohl (msg->request_id));
- GNUNET_CONTAINER_DLL_remove (set->ops_head,
- set->ops_tail,
- oh);
- if ( (GNUNET_YES == set->destroy_requested) &&
- (NULL == set->ops_head) )
- GNUNET_SET_destroy (set);
- if (NULL != oh->result_cb)
- oh->result_cb (oh->result_cls,
- NULL,
- result_status);
- GNUNET_free (oh);
- return;
+ case GNUNET_SET_STATUS_OK:
+ case GNUNET_SET_STATUS_ADD_LOCAL:
+ case GNUNET_SET_STATUS_ADD_REMOTE:
+ goto do_element;
+ case GNUNET_SET_STATUS_FAILURE:
+ case GNUNET_SET_STATUS_DONE:
+ goto do_final;
+ case GNUNET_SET_STATUS_HALF_DONE:
+ /* not used anymore */
+ GNUNET_assert (0);
}
- e.data = &msg[1];
- e.size = ntohs (mh->size) - sizeof (struct GNUNET_SET_ResultMessage);
- e.element_type = msg->element_type;
+
+do_final:
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Treating result as final status\n");
+ GNUNET_MQ_assoc_remove (set->mq,
+ ntohl (msg->request_id));
+ GNUNET_CONTAINER_DLL_remove (set->ops_head,
+ set->ops_tail,
+ oh);
+ /* Need to do this calculation _before_ the result callback,
+ as IF the application still has a valid set handle, it
+ may trigger destruction of the set during the callback. */
+ destroy_set = (GNUNET_YES == set->destroy_requested) &&
+ (NULL == set->ops_head);
if (NULL != oh->result_cb)
+ {
oh->result_cb (oh->result_cls,
- &e,
+ NULL,
result_status);
-}
-
-
-/**
- * Handle request message for a listen operation
- *
- * @param cls the listen handle
- * @param mh the message
- */
-static void
-handle_request (void *cls,
- const struct GNUNET_MessageHeader *mh)
-{
- const struct GNUNET_SET_RequestMessage *msg = (const struct GNUNET_SET_RequestMessage *) mh;
- struct GNUNET_SET_ListenHandle *lh = cls;
- struct GNUNET_SET_Request *req;
- const struct GNUNET_MessageHeader *context_msg;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "processing operation request\n");
- req = GNUNET_new (struct GNUNET_SET_Request);
- req->accept_id = ntohl (msg->accept_id);
- context_msg = GNUNET_MQ_extract_nested_mh (msg);
- /* calling #GNUNET_SET_accept() in the listen cb will set req->accepted */
- lh->listen_cb (lh->listen_cls, &msg->peer_id, context_msg, req);
-
- /* we got another request => reset the backoff */
- lh->reconnect_backoff = GNUNET_TIME_UNIT_MILLISECONDS;
-
- if (GNUNET_NO == req->accepted)
+ }
+ else
{
- struct GNUNET_MQ_Envelope *mqm;
- struct GNUNET_SET_RejectMessage *rmsg;
-
- mqm = GNUNET_MQ_msg (rmsg,
- GNUNET_MESSAGE_TYPE_SET_REJECT);
- rmsg->accept_reject_id = msg->accept_id;
- GNUNET_MQ_send (lh->mq, mqm);
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "rejecting request\n");
+ "No callback for final status\n");
}
- GNUNET_free (req);
+ if (destroy_set)
+ GNUNET_SET_destroy (set);
+ GNUNET_free (oh);
+ return;
+do_element:
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "processed op request from service\n");
-
- /* the accept-case is handled in GNUNET_SET_accept,
- * as we have the accept message available there */
+ "Treating result as element\n");
+ e.data = &msg[1];
+ e.size = ntohs (msg->header.size) - sizeof (struct GNUNET_SET_ResultMessage);
+ e.element_type = ntohs (msg->element_type);
+ if (NULL != oh->result_cb)
+ oh->result_cb (oh->result_cls,
+ &e,
+ result_status);
}
enum GNUNET_MQ_Error error)
{
struct GNUNET_SET_Handle *set = cls;
+ GNUNET_SET_ElementIterator iter = set->iterator;
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Handling client set error\n");
+ "Handling client set error %d\n",
+ error);
while (NULL != set->ops_head)
{
if (NULL != set->ops_head->result_cb)
GNUNET_SET_STATUS_FAILURE);
set_operation_destroy (set->ops_head);
}
+ set->iterator = NULL;
+ set->iteration_id++;
+ if (NULL != iter)
+ iter (set->iterator_cls,
+ NULL);
set->invalid = GNUNET_YES;
if (GNUNET_YES == set->destroy_requested)
{
}
+static struct GNUNET_SET_Handle *
+create_internal (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ enum GNUNET_SET_OperationType op,
+ const uint32_t *cookie)
+{
+ struct GNUNET_SET_Handle *set = GNUNET_new (struct GNUNET_SET_Handle);
+ struct GNUNET_MQ_MessageHandler mq_handlers[] = {
+ GNUNET_MQ_hd_var_size (result,
+ GNUNET_MESSAGE_TYPE_SET_RESULT,
+ struct GNUNET_SET_ResultMessage,
+ set),
+ GNUNET_MQ_hd_var_size (iter_element,
+ GNUNET_MESSAGE_TYPE_SET_ITER_ELEMENT,
+ struct GNUNET_SET_IterResponseMessage,
+ set),
+ GNUNET_MQ_hd_fixed_size (iter_done,
+ GNUNET_MESSAGE_TYPE_SET_ITER_DONE,
+ struct GNUNET_MessageHeader,
+ set),
+ GNUNET_MQ_hd_fixed_size (copy_lazy,
+ GNUNET_MESSAGE_TYPE_SET_COPY_LAZY_RESPONSE,
+ struct GNUNET_SET_CopyLazyResponseMessage,
+ set),
+ GNUNET_MQ_handler_end ()
+ };
+ struct GNUNET_MQ_Envelope *mqm;
+ struct GNUNET_SET_CreateMessage *create_msg;
+ struct GNUNET_SET_CopyLazyConnectMessage *copy_msg;
+
+ set->cfg = cfg;
+ set->mq = GNUNET_CLIENT_connecT (cfg,
+ "set",
+ mq_handlers,
+ &handle_client_set_error,
+ set);
+ if (NULL == set->mq)
+ {
+ GNUNET_free (set);
+ return NULL;
+ }
+ if (NULL == cookie)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Creating new set (operation %u)\n",
+ op);
+ mqm = GNUNET_MQ_msg (create_msg,
+ GNUNET_MESSAGE_TYPE_SET_CREATE);
+ create_msg->operation = htonl (op);
+ }
+ else
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Creating new set (lazy copy)\n",
+ op);
+ mqm = GNUNET_MQ_msg (copy_msg,
+ GNUNET_MESSAGE_TYPE_SET_COPY_LAZY_CONNECT);
+ copy_msg->cookie = *cookie;
+ }
+ GNUNET_MQ_send (set->mq, mqm);
+ return set;
+}
+
+
/**
* Create an empty set, supporting the specified operation.
*
GNUNET_SET_create (const struct GNUNET_CONFIGURATION_Handle *cfg,
enum GNUNET_SET_OperationType op)
{
- static const struct GNUNET_MQ_MessageHandler mq_handlers[] = {
- { &handle_result, GNUNET_MESSAGE_TYPE_SET_RESULT, 0},
- { &handle_iter_element, GNUNET_MESSAGE_TYPE_SET_ITER_ELEMENT, 0},
- { &handle_iter_done,
- GNUNET_MESSAGE_TYPE_SET_ITER_DONE,
- sizeof (struct GNUNET_MessageHeader) },
- GNUNET_MQ_HANDLERS_END
- };
- struct GNUNET_SET_Handle *set;
- struct GNUNET_MQ_Envelope *mqm;
- struct GNUNET_SET_CreateMessage *msg;
-
- set = GNUNET_new (struct GNUNET_SET_Handle);
- set->client = GNUNET_CLIENT_connect ("set", cfg);
- if (NULL == set->client)
- {
- GNUNET_free (set);
- return NULL;
- }
- set->mq = GNUNET_MQ_queue_for_connection_client (set->client,
- mq_handlers,
- &handle_client_set_error, set);
- GNUNET_assert (NULL != set->mq);
- mqm = GNUNET_MQ_msg (msg,
- GNUNET_MESSAGE_TYPE_SET_CREATE);
- msg->operation = htonl (op);
- GNUNET_MQ_send (set->mq, mqm);
- return set;
+ return create_internal (cfg, op, NULL);
}
}
mqm = GNUNET_MQ_msg_extra (msg, element->size,
GNUNET_MESSAGE_TYPE_SET_ADD);
- msg->element_type = element->element_type;
- memcpy (&msg[1],
- element->data,
- element->size);
+ msg->element_type = htons (element->element_type);
+ GNUNET_memcpy (&msg[1],
+ element->data,
+ element->size);
GNUNET_MQ_notify_sent (mqm,
cont, cont_cls);
GNUNET_MQ_send (set->mq, mqm);
mqm = GNUNET_MQ_msg_extra (msg,
element->size,
GNUNET_MESSAGE_TYPE_SET_REMOVE);
- msg->element_type = element->element_type;
- memcpy (&msg[1],
- element->data,
- element->size);
+ msg->element_type = htons (element->element_type);
+ GNUNET_memcpy (&msg[1],
+ element->data,
+ element->size);
GNUNET_MQ_notify_sent (mqm,
cont, cont_cls);
GNUNET_MQ_send (set->mq, mqm);
void
GNUNET_SET_destroy (struct GNUNET_SET_Handle *set)
{
+ /* destroying set while iterator is active is currently
+ not supported; we should expand the API to allow
+ clients to explicitly cancel the iteration! */
+ GNUNET_assert (NULL == set->iterator);
if (NULL != set->ops_head)
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
}
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Really destroying set\n");
- if (NULL != set->client)
- {
- GNUNET_CLIENT_disconnect (set->client);
- set->client = NULL;
- }
if (NULL != set->mq)
{
GNUNET_MQ_destroy (set->mq);
* Connect to the set service in order to listen for requests.
*
* @param cls the `struct GNUNET_SET_ListenHandle *` to connect
- * @param tc task context if invoked as a task, NULL otherwise
*/
static void
-listen_connect (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc);
+listen_connect (void *cls);
+
+
+/**
+ * Check validity of request message for a listen operation
+ *
+ * @param cls the listen handle
+ * @param msg the message
+ * @return #GNUNET_OK if the message is well-formed
+ */
+static int
+check_request (void *cls,
+ const struct GNUNET_SET_RequestMessage *msg)
+{
+ const struct GNUNET_MessageHeader *context_msg;
+
+ if (ntohs (msg->header.size) == sizeof (*msg))
+ return GNUNET_OK; /* no context message is OK */
+ context_msg = GNUNET_MQ_extract_nested_mh (msg);
+ if (NULL == context_msg)
+ {
+ /* malformed context message is NOT ok */
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
+ return GNUNET_OK;
+}
+
+
+/**
+ * Handle request message for a listen operation
+ *
+ * @param cls the listen handle
+ * @param msg the message
+ */
+static void
+handle_request (void *cls,
+ const struct GNUNET_SET_RequestMessage *msg)
+{
+ struct GNUNET_SET_ListenHandle *lh = cls;
+ struct GNUNET_SET_Request req;
+ const struct GNUNET_MessageHeader *context_msg;
+ struct GNUNET_MQ_Envelope *mqm;
+ struct GNUNET_SET_RejectMessage *rmsg;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Processing incoming operation request\n");
+ /* we got another valid request => reset the backoff */
+ lh->reconnect_backoff = GNUNET_TIME_UNIT_MILLISECONDS;
+ req.accept_id = ntohl (msg->accept_id);
+ req.accepted = GNUNET_NO;
+ context_msg = GNUNET_MQ_extract_nested_mh (msg);
+ /* calling #GNUNET_SET_accept() in the listen cb will set req->accepted */
+ lh->listen_cb (lh->listen_cls,
+ &msg->peer_id,
+ context_msg,
+ &req);
+ if (GNUNET_YES == req.accepted)
+ return; /* the accept-case is handled in #GNUNET_SET_accept() */
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Rejecting request\n");
+ mqm = GNUNET_MQ_msg (rmsg,
+ GNUNET_MESSAGE_TYPE_SET_REJECT);
+ rmsg->accept_reject_id = msg->accept_id;
+ GNUNET_MQ_send (lh->mq, mqm);
+}
/**
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Listener broke down (%d), re-connecting\n",
(int) error);
- GNUNET_CLIENT_disconnect (lh->client);
- lh->client = NULL;
GNUNET_MQ_destroy (lh->mq);
lh->mq = NULL;
lh->reconnect_task = GNUNET_SCHEDULER_add_delayed (lh->reconnect_backoff,
- &listen_connect, lh);
+ &listen_connect,
+ lh);
lh->reconnect_backoff = GNUNET_TIME_STD_BACKOFF (lh->reconnect_backoff);
}
* Connect to the set service in order to listen for requests.
*
* @param cls the `struct GNUNET_SET_ListenHandle *` to connect
- * @param tc task context if invoked as a task, NULL otherwise
*/
static void
-listen_connect (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+listen_connect (void *cls)
{
- static const struct GNUNET_MQ_MessageHandler mq_handlers[] = {
- { &handle_request, GNUNET_MESSAGE_TYPE_SET_REQUEST },
- GNUNET_MQ_HANDLERS_END
- };
struct GNUNET_SET_ListenHandle *lh = cls;
+ struct GNUNET_MQ_MessageHandler mq_handlers[] = {
+ GNUNET_MQ_hd_var_size (request,
+ GNUNET_MESSAGE_TYPE_SET_REQUEST,
+ struct GNUNET_SET_RequestMessage,
+ lh),
+ GNUNET_MQ_handler_end ()
+ };
struct GNUNET_MQ_Envelope *mqm;
struct GNUNET_SET_ListenMessage *msg;
- if ( (NULL != tc) &&
- (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)) )
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Listener not reconnecting due to shutdown\n");
- return;
- }
- lh->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
-
- GNUNET_assert (NULL == lh->client);
- lh->client = GNUNET_CLIENT_connect ("set", lh->cfg);
- if (NULL == lh->client)
- return;
+ lh->reconnect_task = NULL;
GNUNET_assert (NULL == lh->mq);
- lh->mq = GNUNET_MQ_queue_for_connection_client (lh->client, mq_handlers,
- &handle_client_listener_error, lh);
+ lh->mq = GNUNET_CLIENT_connecT (lh->cfg,
+ "set",
+ mq_handlers,
+ &handle_client_listener_error,
+ lh);
+ if (NULL == lh->mq)
+ return;
mqm = GNUNET_MQ_msg (msg, GNUNET_MESSAGE_TYPE_SET_LISTEN);
msg->operation = htonl (lh->operation);
msg->app_id = lh->app_id;
- GNUNET_MQ_send (lh->mq, mqm);
+ GNUNET_MQ_send (lh->mq,
+ mqm);
}
lh->operation = operation;
lh->app_id = *app_id;
lh->reconnect_backoff = GNUNET_TIME_UNIT_MILLISECONDS;
- listen_connect (lh, NULL);
- if (NULL == lh->client)
+ listen_connect (lh);
+ if (NULL == lh->mq)
{
GNUNET_free (lh);
return NULL;
GNUNET_MQ_destroy (lh->mq);
lh->mq = NULL;
}
- if (NULL != lh->client)
- {
- GNUNET_CLIENT_disconnect (lh->client);
- lh->client = NULL;
- }
- if (GNUNET_SCHEDULER_NO_TASK != lh->reconnect_task)
+ if (NULL != lh->reconnect_task)
{
GNUNET_SCHEDULER_cancel (lh->reconnect_task);
- lh->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ lh->reconnect_task = NULL;
}
GNUNET_free (lh);
}
GNUNET_SET_commit (struct GNUNET_SET_OperationHandle *oh,
struct GNUNET_SET_Handle *set)
{
- GNUNET_assert (NULL == oh->set);
+ if (NULL != oh->set)
+ {
+ /* Some other set was already commited for this
+ * operation, there is a logic bug in the client of this API */
+ GNUNET_break (0);
+ return GNUNET_OK;
+ }
if (GNUNET_YES == set->invalid)
return GNUNET_SYSERR;
GNUNET_assert (NULL != oh->conclude_mqm);
return GNUNET_YES;
}
+
+void
+GNUNET_SET_copy_lazy (struct GNUNET_SET_Handle *set,
+ GNUNET_SET_CopyReadyCallback cb,
+ void *cls)
+{
+ struct GNUNET_MQ_Envelope *ev;
+ struct SetCopyRequest *req;
+
+ ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_SET_COPY_LAZY_PREPARE);
+ GNUNET_MQ_send (set->mq, ev);
+
+ req = GNUNET_new (struct SetCopyRequest);
+ req->cb = cb;
+ req->cls = cls;
+ GNUNET_CONTAINER_DLL_insert (set->copy_req_head,
+ set->copy_req_tail,
+ req);
+}
+
+
+/**
+ * Create a copy of an element. The copy
+ * must be GNUNET_free-d by the caller.
+ *
+ * @param element the element to copy
+ * @return the copied element
+ */
+struct GNUNET_SET_Element *
+GNUNET_SET_element_dup (const struct GNUNET_SET_Element *element)
+{
+ struct GNUNET_SET_Element *copy;
+
+ copy = GNUNET_malloc (element->size + sizeof (struct GNUNET_SET_Element));
+ copy->size = element->size;
+ copy->element_type = element->element_type;
+ copy->data = ©[1];
+ GNUNET_memcpy (©[1],
+ element->data,
+ copy->size);
+ return copy;
+}
+
+
+/**
+ * Hash a set element.
+ *
+ * @param element the element that should be hashed
+ * @param[out] ret_hash a pointer to where the hash of @a element
+ * should be stored
+ */
+void
+GNUNET_SET_element_hash (const struct GNUNET_SET_Element *element,
+ struct GNUNET_HashCode *ret_hash)
+{
+ struct GNUNET_HashContext *ctx = GNUNET_CRYPTO_hash_context_start ();
+
+ /* It's not guaranteed that the element data is always after the element header,
+ so we need to hash the chunks separately. */
+ GNUNET_CRYPTO_hash_context_read (ctx, &element->size, sizeof (uint16_t));
+ GNUNET_CRYPTO_hash_context_read (ctx, &element->element_type, sizeof (uint16_t));
+ GNUNET_CRYPTO_hash_context_read (ctx, element->data, element->size);
+ GNUNET_CRYPTO_hash_context_finish (ctx, ret_hash);
+}
+
/* end of set_api.c */
projects / oweals / gnunet.git / blobdiff