/**
* Iterator to call on data receipt
*/
- GNUNET_DHT_ReplyProcessor iter;
+ GNUNET_DHT_GetIterator iter;
/**
* Closure for the iterator callback
};
-/**
- * Transmit the next pending message, called by notify_transmit_ready
- */
-static size_t
-transmit_pending (void *cls, size_t size, void *buf);
-
-
/**
* Handler for messages received from the DHT service
* a demultiplexer which handles numerous message types
service_message_handler (void *cls, const struct GNUNET_MessageHeader *msg);
-
-
/**
* Try to (re)connect to the DHT service.
*
}
+/**
+ * Transmit the next pending message, called by notify_transmit_ready
+ */
+static size_t
+transmit_pending (void *cls, size_t size, void *buf);
+
+
/**
* Try to send messages from list of messages to send
*/
GNUNET_TIME_UNIT_FOREVER_REL,
GNUNET_YES, &transmit_pending,
handle);
- if (NULL == handle->th)
- {
- do_disconnect (handle);
+ if (NULL != handle->th)
return;
- }
+ do_disconnect (handle);
}
/**
* Process a given reply that might match the given
* request.
+ *
+ * @param cls the 'struct GNUNET_DHT_ClientResultMessage'
+ * @param key query of the request
+ * @param value the 'struct GNUNET_DHT_RouteHandle' of a request matching the same key
+ * @return GNUNET_YES to continue to iterate over all results,
+ * GNUNET_NO if the reply is malformed
*/
static int
process_reply (void *cls, const GNUNET_HashCode * key, void *value)
{
- const struct GNUNET_DHT_RouteResultMessage *dht_msg = cls;
+ const struct GNUNET_DHT_ClientResultMessage *dht_msg = cls;
struct GNUNET_DHT_RouteHandle *rh = value;
- const struct GNUNET_MessageHeader *enc_msg;
- size_t enc_size;
- uint64_t uid;
- const struct GNUNET_PeerIdentity **outgoing_path;
- const struct GNUNET_PeerIdentity *pos;
- uint32_t outgoing_path_length;
- unsigned int i;
- char *path_offset;
-
- uid = GNUNET_ntohll (dht_msg->unique_id);
-#if HAVE_UID_FOR_TESTING
- if (uid != rh->uid)
+ const struct GNUNET_PeerIdentity *put_path;
+ const struct GNUNET_PeerIdentity *get_path;
+ uint32_t put_path_length;
+ uint32_t get_path_length;
+ size_t data_length;
+ size_t msize;
+ size_t meta_length;
+ const void *data;
+
+ if (dht_msg->unique_id != rh->uid)
{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Reply UID did not match request UID\n");
+ /* UID mismatch */
return GNUNET_YES;
}
-#endif
- enc_msg = (const struct GNUNET_MessageHeader *) &dht_msg[1];
- enc_size = ntohs (enc_msg->size);
- if (enc_size < sizeof (struct GNUNET_MessageHeader))
- {
- GNUNET_break (0);
- return GNUNET_NO;
- }
- path_offset = (char *) &dht_msg[1];
- path_offset += enc_size;
- pos = (const struct GNUNET_PeerIdentity *) path_offset;
- outgoing_path_length = ntohl (dht_msg->outgoing_path_length);
- if (outgoing_path_length * sizeof (struct GNUNET_PeerIdentity) >
- ntohs (dht_msg->header.size) - enc_size)
- {
- GNUNET_break (0);
- return GNUNET_NO;
- }
-
- if (outgoing_path_length > 0)
- {
- outgoing_path =
- GNUNET_malloc ((outgoing_path_length +
- 1) * sizeof (struct GNUNET_PeerIdentity *));
- for (i = 0; i < outgoing_path_length; i++)
+ msize = ntohs (dht_msg->header.size);
+ meta_length = sizeof (struct GNUNET_DHT_ClientResultMessage) +
+ sizeof (struct GNUNET_PeerIdentity) * (get_path_length + put_path_length);
+ put_path_length = ntohl (dht_msg->put_path_length);
+ get_path_length = ntohl (dht_msg->get_path_length);
+ if ( (msize < meta_length) ||
+ (get_path_length > GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_PeerIdentity)) ||
+ (put_path_length > GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_PeerIdentity)) )
{
- outgoing_path[i] = pos;
- pos++;
+ GNUNET_break (0);
+ return GNUNET_NO;
}
- outgoing_path[outgoing_path_length] = NULL;
- }
- else
- outgoing_path = NULL;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Processing reply.\n");
- rh->iter (rh->iter_cls, &rh->key, outgoing_path, enc_msg);
- GNUNET_free_non_null (outgoing_path);
+ data_length = msize - meta_length;
+ put_path = (const struct GNUNET_PeerIdentity *) &dht_msg[1];
+ get_path = &put_path[put_path_length];
+ data = &get_path[get_path_length];
+ rh->iter (rh->iter_cls,
+ GNUNET_TIME_absolute_ntoh (dht_msg->expiration),
+ key,
+ get_path, get_path_length,
+ put_path, put_path_length,
+ ntohl (dht_msg->type),
+ data_size, data);
return GNUNET_YES;
}
do_disconnect (handle);
return;
}
- if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_DHT_LOCAL_ROUTE_RESULT)
+ if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_DHT_CLIENT_RESULT)
{
GNUNET_break (0);
do_disconnect (handle);
return;
}
dht_msg = (const struct GNUNET_DHT_RouteResultMessage *) msg;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Comparing reply `%s' against %u pending requests.\n",
- GNUNET_h2s (&dht_msg->key),
- GNUNET_CONTAINER_multihashmap_size (handle->active_requests));
GNUNET_CONTAINER_multihashmap_get_multiple (handle->active_requests,
&dht_msg->key, &process_reply,
(void *) dht_msg);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Continuing to process replies from DHT\n");
GNUNET_CLIENT_receive (handle->client, &service_message_handler, handle,
GNUNET_TIME_UNIT_FOREVER_REL);
-
}
}
-
-
-/* ***** Special low-level API providing generic routing abstraction ***** */
-
-
/**
* Timeout for the transmission of a fire&forget-request. Clean it up.
*
* @param tc scheduler context
*/
static void
-timeout_route_request (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+timeout_put_request (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct PendingMessage *pending = cls;
struct GNUNET_DHT_Handle *handle;
- if (pending->free_on_send != GNUNET_YES)
- {
- /* timeouts should only apply to fire & forget requests! */
- GNUNET_break (0);
- return;
- }
handle = pending->handle;
GNUNET_CONTAINER_DLL_remove (handle->pending_head, handle->pending_tail,
pending);
/**
- * Initiate a generic DHT route operation.
+ * Perform a PUT operation storing data in the DHT.
*
- * @param handle handle to the DHT service
- * @param key the key to look up
- * @param desired_replication_level how many peers should ultimately receive
- * this message (advisory only, target may be too high for the
- * given DHT or not hit exactly).
- * @param options options for routing
- * @param enc send the encapsulated message to a peer close to the key
- * @param iter function to call on each result, NULL if no replies are expected
- * @param iter_cls closure for iter
- * @param timeout when to abort with an error if we fail to get
- * a confirmation for the request (when necessary) or how long
- * to wait for tramission to the service; only applies
- * if 'iter' is NULL
- * @param cont continuation to call when the request has been transmitted
- * the first time to the service
+ * @param handle handle to DHT service
+ * @param key the key to store under
+ * @param desired_replication_level estimate of how many
+ * nearest peers this request should reach
+ * @param options routing options for this message
+ * @param type type of the value
+ * @param size number of bytes in data; must be less than 64k
+ * @param data the data to store
+ * @param exp desired expiration time for the value
+ * @param timeout how long to wait for transmission of this request
+ * @param cont continuation to call when done (transmitting request to service)
* @param cont_cls closure for cont
- * @return handle to stop the request, NULL if the request is "fire and forget"
*/
-struct GNUNET_DHT_RouteHandle *
-GNUNET_DHT_route_start (struct GNUNET_DHT_Handle *handle,
- const GNUNET_HashCode * key,
- uint32_t desired_replication_level,
- enum GNUNET_DHT_RouteOption options,
- const struct GNUNET_MessageHeader *enc,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_DHT_ReplyProcessor iter, void *iter_cls,
- GNUNET_SCHEDULER_Task cont, void *cont_cls)
+void
+GNUNET_DHT_put (struct GNUNET_DHT_Handle *handle, const GNUNET_HashCode * key,
+ uint32_t desired_replication_level,
+ enum GNUNET_DHT_RouteOption options,
+ enum GNUNET_BLOCK_Type type, size_t size, const char *data,
+ struct GNUNET_TIME_Absolute exp,
+ struct GNUNET_TIME_Relative timeout, GNUNET_SCHEDULER_Task cont,
+ void *cont_cls)
{
- struct PendingMessage *pending;
- struct GNUNET_DHT_RouteMessage *message;
- struct GNUNET_DHT_RouteHandle *route_handle;
- uint16_t msize;
- uint16_t esize;
-
- esize = ntohs (enc->size);
- if (sizeof (struct GNUNET_DHT_RouteMessage) + esize >=
- GNUNET_SERVER_MAX_MESSAGE_SIZE)
- {
- GNUNET_break (0);
- return NULL;
- }
- msize = sizeof (struct GNUNET_DHT_RouteMessage) + esize;
+ struct GNUNET_DHT_ClientPutMessage *put_msg;
+
+ msize = sizeof (struct GNUNET_DHT_ClientPutMessage) + size;
+ if (msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
+ {
+ GNUNET_break (0);
+ if (NULL != cont)
+ cont (cont_cls, NULL);
+ return;
+ }
pending = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
- message = (struct GNUNET_DHT_RouteMessage *) &pending[1];
+ message = (struct GNUNET_DHT_ClientPutMessage *) &pending[1];
pending->msg = &message->header;
pending->handle = handle;
pending->cont = cont;
pending->cont_cls = cont_cls;
-
+ pending->free_on_send = GNUNET_YES;
+ pending->timeout_task =
+ GNUNET_SCHEDULER_add_delayed (timeout, &timeout_put_request, pending);
message->header.size = htons (msize);
- message->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_LOCAL_ROUTE);
+ message->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CLIENT_PUT);
+ message->type = htonl (type);
message->options = htonl ((uint32_t) options);
message->desired_replication_level = htonl (desired_replication_level);
- message->reserved = 0;
+ message->expiration = GNUNET_TIME_absolute_hton (exp);
message->key = *key;
handle->uid_gen++;
- message->unique_id = GNUNET_htonll (handle->uid_gen);
- memcpy (&message[1], enc, esize);
-
- if (iter != NULL)
- {
- route_handle = GNUNET_malloc (sizeof (struct GNUNET_DHT_RouteHandle));
- route_handle->key = *key;
- route_handle->iter = iter;
- route_handle->iter_cls = iter_cls;
- route_handle->dht_handle = handle;
- route_handle->uid = handle->uid_gen;
- route_handle->message = pending;
- GNUNET_CONTAINER_multihashmap_put (handle->active_requests, key,
- route_handle,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
- }
- else
- {
- route_handle = NULL;
- pending->free_on_send = GNUNET_YES;
- pending->timeout_task =
- GNUNET_SCHEDULER_add_delayed (timeout, &timeout_route_request, pending);
- }
+ message->unique_id = handle->uid_gen;
+ memcpy (&message[1], data, size);
GNUNET_CONTAINER_DLL_insert (handle->pending_head, handle->pending_tail,
pending);
pending->in_pending_queue = GNUNET_YES;
process_pending_messages (handle);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "DHT route start request processed, returning %p\n",
- route_handle);
- return route_handle;
-}
-
-
-/**
- * Stop a previously issued routing request
- *
- * @param route_handle handle to the request to stop
- */
-void
-GNUNET_DHT_route_stop (struct GNUNET_DHT_RouteHandle *route_handle)
-{
- struct GNUNET_DHT_Handle *handle;
- struct PendingMessage *pending;
- struct GNUNET_DHT_StopMessage *message;
- size_t msize;
-
- handle = route_handle->dht_handle;
- if (GNUNET_NO == route_handle->message->in_pending_queue)
- {
- /* need to send stop message */
- msize = sizeof (struct GNUNET_DHT_StopMessage);
- pending = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
- message = (struct GNUNET_DHT_StopMessage *) &pending[1];
- pending->msg = &message->header;
- message->header.size = htons (msize);
- message->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_LOCAL_ROUTE_STOP);
- message->reserved = 0;
- message->unique_id = GNUNET_htonll (route_handle->uid);
- message->key = route_handle->key;
- pending->handle = handle;
- pending->free_on_send = GNUNET_YES;
- pending->in_pending_queue = GNUNET_YES;
- GNUNET_CONTAINER_DLL_insert (handle->pending_head, handle->pending_tail,
- pending);
- process_pending_messages (handle);
- }
- else
- {
- /* simply remove pending request from message queue before
- * transmission, no need to transmit STOP request! */
- GNUNET_CONTAINER_DLL_remove (handle->pending_head, handle->pending_tail,
- route_handle->message);
- }
- GNUNET_assert (GNUNET_YES ==
- GNUNET_CONTAINER_multihashmap_remove
- (route_handle->dht_handle->active_requests, &route_handle->key,
- route_handle));
- GNUNET_free (route_handle->message);
- GNUNET_free (route_handle);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "DHT route stop request processed\n");
}
-
-/* ***** Special API for controlling DHT routing maintenance ******* */
-
-
/**
- * Send a control message to the DHT.
+ * Perform an asynchronous GET operation on the DHT identified. See
+ * also "GNUNET_BLOCK_evaluate".
*
* @param handle handle to the DHT service
- * @param command command
- * @param variable variable to the command
- * @param cont continuation to call when done (transmitting request to service)
- * @param cont_cls closure for cont
+ * @param timeout how long to wait for transmission of this request to the service
+ * @param type expected type of the response object
+ * @param key the key to look up
+ * @param desired_replication_level estimate of how many
+ nearest peers this request should reach
+ * @param options routing options for this message
+ * @param xquery extended query data (can be NULL, depending on type)
+ * @param xquery_size number of bytes in xquery
+ * @param iter function to call on each result
+ * @param iter_cls closure for iter
+ * @return handle to stop the async get
*/
-static void
-send_control_message (struct GNUNET_DHT_Handle *handle, uint16_t command,
- uint16_t variable, GNUNET_SCHEDULER_Task cont,
- void *cont_cls)
+struct GNUNET_DHT_GetHandle *
+GNUNET_DHT_get_start (struct GNUNET_DHT_Handle *handle,
+ struct GNUNET_TIME_Relative timeout,
+ enum GNUNET_BLOCK_Type type, const GNUNET_HashCode * key,
+ uint32_t desired_replication_level,
+ enum GNUNET_DHT_RouteOption options,
+ const void *xquery, size_t xquery_size,
+ GNUNET_DHT_GetIterator iter, void *iter_cls)
{
- struct GNUNET_DHT_ControlMessage *msg;
- struct PendingMessage *pending;
-
- pending =
- GNUNET_malloc (sizeof (struct PendingMessage) +
- sizeof (struct GNUNET_DHT_ControlMessage));
- msg = (struct GNUNET_DHT_ControlMessage *) &pending[1];
- pending->msg = &msg->header;
- msg->header.size = htons (sizeof (struct GNUNET_DHT_ControlMessage));
- msg->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CONTROL);
- msg->command = htons (command);
- msg->variable = htons (variable);
- pending->free_on_send = GNUNET_YES;
- pending->cont = cont;
- pending->cont_cls = cont_cls;
- pending->in_pending_queue = GNUNET_YES;
+ struct GNUNET_DHT_ClientGetMessage *get_msg;
+ struct GNUNET_DHT_GetHandle *get_handle;
+
+ msize = sizeof (struct GNUNET_DHT_ClientGetMessage) + xquery_size;
+ if (msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ pending = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
+ message = (struct GNUNET_DHT_ClientGetMessage *) &pending[1];
+ pending->msg = &message->header;
+ pending->handle = handle;
+ pending->free_on_send = GNUNET_NO;
+ message->header.size = htons (msize);
+ message->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET);
+ message->options = htonl ((uint32_t) options);
+ message->desired_replication_level = htonl (desired_replication_level);
+ message->type = htonl (type);
+ message->key = *key;
+ handle->uid_gen++;
+ message->unique_id = handle->uid_gen;
+ memcpy (&message[1], xquery, xquery_size);
GNUNET_CONTAINER_DLL_insert (handle->pending_head, handle->pending_tail,
pending);
+ pending->in_pending_queue = GNUNET_YES;
+ get_handle = GNUNET_malloc (sizeof (struct GNUNET_DHT_GetHandle));
+ get_handle->iter = iter;
+ get_handle->iter_cls = iter_cls;
+ get_handle->route_handle = pending;
+ GNUNET_CONTAINER_multihashmap_put (handle->active_requests,
+ key, get_handle,
+ GNUNET_CONTAINER_MULITHASHMAPOPTION_MULTIPLE);
process_pending_messages (handle);
+ return get_handle;
}
/**
- * Send a message to the DHT telling it to issue a single find
- * peer request using the peers unique identifier as key. This
- * is used to fill the routing table, and is normally controlled
- * by the DHT itself. However, for testing and perhaps more
- * close control over the DHT, this can be explicitly managed.
+ * Stop async DHT-get.
*
- * @param handle handle to the DHT service
- * @param cont continuation to call when done (transmitting request to service)
- * @param cont_cls closure for cont
+ * @param get_handle handle to the GET operation to stop
*/
void
-GNUNET_DHT_find_peers (struct GNUNET_DHT_Handle *handle,
- GNUNET_SCHEDULER_Task cont, void *cont_cls)
+GNUNET_DHT_get_stop (struct GNUNET_DHT_GetHandle *get_handle)
{
- send_control_message (handle, GNUNET_MESSAGE_TYPE_DHT_FIND_PEER, 0, cont,
- cont_cls);
-}
-
-
-
-#if HAVE_MALICIOUS
-
-/**
- * Send a message to the DHT telling it to start issuing random GET
- * requests every 'frequency' milliseconds.
- *
- * @param handle handle to the DHT service
- * @param frequency delay between sending malicious messages
- * @param cont continuation to call when done (transmitting request to service)
- * @param cont_cls closure for cont
- */
-void
-GNUNET_DHT_set_malicious_getter (struct GNUNET_DHT_Handle *handle,
- struct GNUNET_TIME_Relative frequency,
- GNUNET_SCHEDULER_Task cont, void *cont_cls)
-{
- if (frequency.rel_value > UINT16_MAX)
- {
- GNUNET_break (0);
- return;
- }
- send_control_message (handle, GNUNET_MESSAGE_TYPE_DHT_MALICIOUS_GET,
- frequency.rel_value, cont, cont_cls);
-}
-
-/**
- * Send a message to the DHT telling it to start issuing random PUT
- * requests every 'frequency' milliseconds.
- *
- * @param handle handle to the DHT service
- * @param frequency delay between sending malicious messages
- * @param cont continuation to call when done (transmitting request to service)
- * @param cont_cls closure for cont
- */
-void
-GNUNET_DHT_set_malicious_putter (struct GNUNET_DHT_Handle *handle,
- struct GNUNET_TIME_Relative frequency,
- GNUNET_SCHEDULER_Task cont, void *cont_cls)
-{
- if (frequency.rel_value > UINT16_MAX)
- {
- GNUNET_break (0);
- return;
- }
-
- send_control_message (handle, GNUNET_MESSAGE_TYPE_DHT_MALICIOUS_PUT,
- frequency.rel_value, cont, cont_cls);
-}
-
+ struct GNUNET_DHT_Handle *handle;
+ const struct GNUNET_DHT_ClientGetMessage *get_msg;
-/**
- * Send a message to the DHT telling it to start dropping
- * all requests received.
- *
- * @param handle handle to the DHT service
- * @param cont continuation to call when done (transmitting request to service)
- * @param cont_cls closure for cont
- *
- */
-void
-GNUNET_DHT_set_malicious_dropper (struct GNUNET_DHT_Handle *handle,
- GNUNET_SCHEDULER_Task cont, void *cont_cls)
-{
- send_control_message (handle, GNUNET_MESSAGE_TYPE_DHT_MALICIOUS_DROP, 0, cont,
- cont_cls);
+ handle = get_handle->pending->handle;
+ get_msg = (const struct GNUNET_DHT_ClientGetMessage*) get_handle->pending->msg;
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_remove (handle->active_requests,
+ &get_msg->key, get_handle));
+ if (GNUNET_YES == get_handle->pending->in_pending_queue)
+ {
+ GNUNET_CONTAINER_DLL_remove (handle->pending_head,
+ handle->pending_tail,
+ get_handle->pending);
+ get_handle->pending->in_pending_queue = GNUNET_NO;
+ }
+ GNUNET_free (get_handle->pending);
+ GNUNET_free (get_handle);
}
-#endif
/* end of dht_api.c */
projects / oweals / gnunet.git / commitdiff