/*
This file is part of GNUnet.
- (C) 2009, 2010, 2011 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2009, 2010, 2011, 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.
*/
/**
*/
#include "platform.h"
-#include "gnunet_block_lib.h"
-#include "gnunet_util_lib.h"
+#include "gnunet_constants.h"
#include "gnunet_protocols.h"
-#include "gnunet_nse_service.h"
-#include "gnunet_core_service.h"
-#include "gnunet_datacache_lib.h"
-#include "gnunet_transport_service.h"
-#include "gnunet_hello_lib.h"
-#include "gnunet_dht_service.h"
#include "gnunet_statistics_service.h"
-#include "dht_new.h"
-#include <fenv.h>
-#include "gnunet-service-dht_clients.h"
+#include "gnunet-service-dht.h"
#include "gnunet-service-dht_datacache.h"
#include "gnunet-service-dht_neighbours.h"
+#include "dht.h"
/**
- * Linked list of messages to send to clients.
+ * Should routing details be logged to stderr (for debugging)?
*/
-struct PendingMessage
-{
- /**
- * Pointer to next item in the list
- */
- struct PendingMessage *next;
+#define LOG_TRAFFIC(kind,...) GNUNET_log_from (kind, "dht-traffic",__VA_ARGS__)
- /**
- * Pointer to previous item in the list
- */
- struct PendingMessage *prev;
-
- /**
- * Actual message to be sent, allocated at the end of the struct:
- * // msg = (cast) &pm[1];
- * // memcpy (&pm[1], data, len);
- */
- const struct GNUNET_MessageHeader *msg;
-
-};
+#define LOG(kind,...) GNUNET_log_from (kind, "dht-clients",__VA_ARGS__)
/**
* handle to connect to it, and any pending messages
* that need to be sent to it.
*/
-struct ClientList
-{
- /**
- * Linked list of active clients
- */
- struct ClientList *next;
+struct ClientHandle;
- /**
- * Linked list of active clients
- */
- struct ClientList *prev;
- /**
- * The handle to this client
- */
- struct GNUNET_SERVER_Client *client_handle;
-
- /**
- * Handle to the current transmission request, NULL
- * if none pending.
- */
- struct GNUNET_CONNECTION_TransmitHandle *transmit_handle;
+/**
+ * Entry in the local forwarding map for a client's GET request.
+ */
+struct ClientQueryRecord
+{
/**
- * Linked list of pending messages for this client
+ * The key this request was about
*/
- struct PendingMessage *pending_head;
+ struct GNUNET_HashCode key;
/**
- * Tail of linked list of pending messages for this client
+ * Kept in a DLL with @e client.
*/
- struct PendingMessage *pending_tail;
-
-};
-
-
-/**
- * Entry in the DHT routing table for a client's GET request.
- */
-struct ClientQueryRecord
-{
+ struct ClientQueryRecord *next;
/**
- * The key this request was about
+ * Kept in a DLL with @e client.
*/
- GNUNET_HashCode key;
+ struct ClientQueryRecord *prev;
/**
* Client responsible for the request.
*/
- struct ClientList *client;
+ struct ClientHandle *ch;
/**
* Extended query (see gnunet_block_lib.h), allocated at the end of this struct.
/**
* Replies we have already seen for this request.
*/
- GNUNET_HashCode *seen_replies;
+ struct GNUNET_HashCode *seen_replies;
/**
* Pointer to this nodes heap location in the retry-heap (for fast removal)
/**
* The type for the data for the GET request.
*/
- enum GNUNET_BLOCK_Type msg_type;
+ enum GNUNET_BLOCK_Type type;
+
+};
+
+
+/**
+ * Struct containing paremeters of monitoring requests.
+ */
+struct ClientMonitorRecord
+{
+
+ /**
+ * Next element in DLL.
+ */
+ struct ClientMonitorRecord *next;
+
+ /**
+ * Previous element in DLL.
+ */
+ struct ClientMonitorRecord *prev;
+
+ /**
+ * Type of blocks that are of interest
+ */
+ enum GNUNET_BLOCK_Type type;
+
+ /**
+ * Key of data of interest, NULL for all.
+ */
+ struct GNUNET_HashCode *key;
+
+ /**
+ * Flag whether to notify about GET messages.
+ */
+ int16_t get;
+
+ /**
+ * Flag whether to notify about GET_REPONSE messages.
+ */
+ int16_t get_resp;
+
+ /**
+ * Flag whether to notify about PUT messages.
+ */
+ uint16_t put;
+
+ /**
+ * Client to notify of these requests.
+ */
+ struct ClientHandle *ch;
+};
+
+
+/**
+ * Struct containing information about a client,
+ * handle to connect to it, and any pending messages
+ * that need to be sent to it.
+ */
+struct ClientHandle
+{
+ /**
+ * Linked list of active queries of this client.
+ */
+ struct ClientQueryRecord *cqr_head;
+
+ /**
+ * Linked list of active queries of this client.
+ */
+ struct ClientQueryRecord *cqr_tail;
+
+ /**
+ * The handle to this client
+ */
+ struct GNUNET_SERVICE_Client *client;
+
+ /**
+ * The message queue to this client
+ */
+ struct GNUNET_MQ_Handle *mq;
};
+/**
+ * Our handle to the BLOCK library.
+ */
+struct GNUNET_BLOCK_Context *GDS_block_context;
+
+/**
+ * Handle for the statistics service.
+ */
+struct GNUNET_STATISTICS_Handle *GDS_stats;
+
+/**
+ * Handle for the service.
+ */
+struct GNUNET_SERVICE_Handle *GDS_service;
+
+/**
+ * The configuration the DHT service is running with
+ */
+const struct GNUNET_CONFIGURATION_Handle *GDS_cfg;
/**
- * List of active clients.
+ * List of active monitoring requests.
*/
-static struct ClientList *client_head;
+static struct ClientMonitorRecord *monitor_head;
/**
- * List of active clients.
+ * List of active monitoring requests.
*/
-static struct ClientList *client_tail;
+static struct ClientMonitorRecord *monitor_tail;
/**
- * Hashmap for fast key based lookup, maps keys to 'struct ClientQueryRecord' entries.
+ * Hashmap for fast key based lookup, maps keys to `struct ClientQueryRecord` entries.
*/
static struct GNUNET_CONTAINER_MultiHashMap *forward_map;
/**
* Task that re-transmits requests (using retry_heap).
*/
-static GNUNET_SCHEDULER_TaskIdentifier retry_task;
+static struct GNUNET_SCHEDULER_Task *retry_task;
/**
- * Find a client if it exists, add it otherwise.
- *
- * @param client the server handle to the client
+ * Free data structures associated with the given query.
*
- * @return the client if found, a new client otherwise
+ * @param record record to remove
*/
-static struct ClientList *
-find_active_client (struct GNUNET_SERVER_Client *client)
+static void
+remove_client_record (struct ClientQueryRecord *record)
{
- struct ClientList *pos = client_list;
- struct ClientList *ret;
+ struct ClientHandle *ch = record->ch;
- while (pos != NULL)
- {
- if (pos->client_handle == client)
- return pos;
- pos = pos->next;
- }
- ret = GNUNET_malloc (sizeof (struct ClientList));
- ret->client_handle = client;
- GNUNET_CONTAINER_DLL_insert (client_head,
- client_tail,
- ret);
- return ret;
+ GNUNET_CONTAINER_DLL_remove (ch->cqr_head,
+ ch->cqr_tail,
+ record);
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_remove (forward_map,
+ &record->key,
+ record));
+ if (NULL != record->hnode)
+ GNUNET_CONTAINER_heap_remove_node (record->hnode);
+ GNUNET_array_grow (record->seen_replies,
+ record->seen_replies_count,
+ 0);
+ GNUNET_free (record);
}
/**
- * Iterator over hash map entries that frees all entries
- * associated with the given client.
+ * Functions with this signature are called whenever a local client is
+ * connects to us.
*
- * @param cls client to search for in source routes
- * @param key current key code (ignored)
- * @param value value in the hash map, a ClientQueryRecord
- * @return GNUNET_YES (we should continue to iterate)
+ * @param cls closure (NULL for dht)
+ * @param client identification of the client
+ * @param mq message queue for talking to @a client
+ * @return our `struct ClientHandle` for @a client
*/
-static int
-remove_client_records (void *cls, const GNUNET_HashCode * key, void *value)
+static void *
+client_connect_cb (void *cls,
+ struct GNUNET_SERVICE_Client *client,
+ struct GNUNET_MQ_Handle *mq)
{
- struct ClientList *client = cls;
- struct ClientQueryRecord *record = value;
+ struct ClientHandle *ch;
- if (record->client != client)
- return GNUNET_YES;
- GNUNET_assert (GNUNET_YES ==
- GNUNET_CONTAINER_multihashmap_remove (forward_map,
- key, record));
- GNUNET_CONTAINER_heap_remove_node (record->hnode);
- GNUNET_ARRAY_append (record->seen_replies,
- record->seen_replies_count,
- 0);
- GNUNET_free (record);
- return GNUNET_YES;
+ ch = GNUNET_new (struct ClientHandle);
+ ch->client = client;
+ ch->mq = mq;
+ return ch;
}
* is disconnected on the network level.
*
* @param cls closure (NULL for dht)
- * @param client identification of the client; NULL
- * for the last call when the server is destroyed
+ * @param client identification of the client
+ * @param app_ctx our `struct ClientHandle` for @a client
*/
static void
-handle_client_disconnect (void *cls,
- struct GNUNET_SERVER_Client *client)
+client_disconnect_cb (void *cls,
+ struct GNUNET_SERVICE_Client *client,
+ void *app_ctx)
{
- struct ClientList *pos = client_list;
- struct ClientList *found;
- struct PendingMessage *reply;
+ struct ClientHandle *ch = app_ctx;
+ struct ClientQueryRecord *cqr;
+ struct ClientMonitorRecord *monitor;
- found = NULL;
- while (pos != NULL)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Local client %p disconnects\n",
+ ch);
+ monitor = monitor_head;
+ while (NULL != monitor)
{
- if (pos->client_handle == client)
+ if (monitor->ch == ch)
{
- GNUNET_CONTAINER_DLL_remove (client_head,
- client_tail,
- pos);
- found = pos;
- break;
+ struct ClientMonitorRecord *next;
+
+ next = monitor->next;
+ GNUNET_free_non_null (monitor->key);
+ GNUNET_CONTAINER_DLL_remove (monitor_head,
+ monitor_tail,
+ monitor);
+ GNUNET_free (monitor);
+ monitor = next;
}
- pos = pos->next;
- }
- if (found == NULL)
- return;
- if (found->transmit_handle != NULL)
- GNUNET_CONNECTION_notify_transmit_ready_cancel (found->transmit_handle);
- while (NULL != (reply = found->pending_head))
+ else
{
- GNUNET_CONTAINER_DLL_remove (found->pending_head, found->pending_tail,
- reply);
- GNUNET_free (reply);
+ monitor = monitor->next;
}
- GNUNET_CONTAINER_multihashmap_iterate (forward_list.hashmap,
- &remove_client_records, found);
- GNUNET_free (found);
+ }
+ while (NULL != (cqr = ch->cqr_head))
+ remove_client_record (cqr);
+ GNUNET_free (ch);
}
/**
- * Route the given request via the DHT. This includes updating
+ * Route the given request via the DHT. This includes updating
* the bloom filter and retransmission times, building the P2P
* message and initiating the routing operation.
*/
transmit_request (struct ClientQueryRecord *cqr)
{
int32_t reply_bf_mutator;
-
- reply_bf_mutator = (int32_t) GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
- UINT32_MAX);
- reply_bf = GNUNET_BLOCK_construct_bloomfilter (reply_bf_mutator,
- cqr->seen_replies,
- cqr->seen_replies_count);
- GST_NEIGHBOURS_handle_get (cqr->msg_type,
- cqr->msg_options,
- cqr->replication,
- &cqr->key,
- cqr->xquery,
- cqr->xquery_size,
- reply_bf,
- reply_bf_mutator,
- NULL /* no peers blocked initially */);
- GNUNET_CONTAINER_bloomfilter_destroy (reply_bf);
-
- /* exponential back-off for retries, max 1h */
- cqr->retry_frequency =
- GNUNET_TIME_relative_max (GNUNET_TIME_UNIT_HOURS,
- GNUNET_TIME_relative_multiply (cqr->retry_frequency, 2));
+ struct GNUNET_CONTAINER_BloomFilter *reply_bf;
+ struct GNUNET_CONTAINER_BloomFilter *peer_bf;
+
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop ("# GET requests from clients injected"),
+ 1,
+ GNUNET_NO);
+ reply_bf_mutator =
+ (int32_t) GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
+ UINT32_MAX);
+ reply_bf
+ = GNUNET_BLOCK_construct_bloomfilter (reply_bf_mutator,
+ cqr->seen_replies,
+ cqr->seen_replies_count);
+ peer_bf
+ = GNUNET_CONTAINER_bloomfilter_init (NULL,
+ DHT_BLOOM_SIZE,
+ GNUNET_CONSTANTS_BLOOMFILTER_K);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Initiating GET for %s, replication %u, already have %u replies\n",
+ GNUNET_h2s (&cqr->key),
+ cqr->replication,
+ cqr->seen_replies_count);
+ GDS_NEIGHBOURS_handle_get (cqr->type,
+ cqr->msg_options,
+ cqr->replication,
+ 0 /* hop count */ ,
+ &cqr->key,
+ cqr->xquery,
+ cqr->xquery_size,
+ reply_bf,
+ reply_bf_mutator,
+ peer_bf);
+ GNUNET_CONTAINER_bloomfilter_free (reply_bf);
+ GNUNET_CONTAINER_bloomfilter_free (peer_bf);
+
+ /* exponential back-off for retries.
+ * max GNUNET_TIME_STD_EXPONENTIAL_BACKOFF_THRESHOLD (15 min) */
+ cqr->retry_frequency = GNUNET_TIME_STD_BACKOFF (cqr->retry_frequency);
cqr->retry_time = GNUNET_TIME_relative_to_absolute (cqr->retry_frequency);
}
/**
- * Task that looks at the 'retry_heap' and transmits all of the requests
+ * Task that looks at the #retry_heap and transmits all of the requests
* on the heap that are ready for transmission. Then re-schedules
* itself (unless the heap is empty).
*
* @param cls unused
- * @param tc scheduler context
*/
static void
-transmit_next_request_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+transmit_next_request_task (void *cls)
{
struct ClientQueryRecord *cqr;
struct GNUNET_TIME_Relative delay;
- retry_task = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
+ retry_task = NULL;
while (NULL != (cqr = GNUNET_CONTAINER_heap_remove_root (retry_heap)))
+ {
+ cqr->hnode = NULL;
+ delay = GNUNET_TIME_absolute_get_remaining (cqr->retry_time);
+ if (delay.rel_value_us > 0)
{
- cqr->hnode = NULL;
- delay = GNUNET_TIME_absolute_get_remaining (cqr->retry_time);
- if (delay.value > 0)
- {
- cqr->hnode = GNUNET_CONTAINER_heap_insert (retry_heap, cqr,
- cqr->retry_time.abs_value);
- retry_task = GNUNET_SCHEDULER_add_delayed (delay,
- &transmit_next_request_task,
- NULL);
- return;
- }
- transmit_request (cqr);
+ cqr->hnode =
+ GNUNET_CONTAINER_heap_insert (retry_heap,
+ cqr,
+ cqr->retry_time.abs_value_us);
+ retry_task =
+ GNUNET_SCHEDULER_add_delayed (delay,
+ &transmit_next_request_task,
+ NULL);
+ return;
}
+ transmit_request (cqr);
+ cqr->hnode
+ = GNUNET_CONTAINER_heap_insert (retry_heap, cqr,
+ cqr->retry_time.abs_value_us);
+ }
+}
+
+
+/**
+ * Check DHT PUT messages from the client.
+ *
+ * @param cls the client we received this message from
+ * @param dht_msg the actual message received
+ * @return #GNUNET_OK (always)
+ */
+static int
+check_dht_local_put (void *cls,
+ const struct GNUNET_DHT_ClientPutMessage *dht_msg)
+{
+ /* always well-formed */
+ return GNUNET_OK;
}
/**
* Handler for PUT messages.
*
- * @param cls closure for the service
- * @param client the client we received this message from
- * @param message the actual message received
+ * @param cls the client we received this message from
+ * @param dht_msg the actual message received
*/
static void
-handle_dht_local_put (void *cls, struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+handle_dht_local_put (void *cls,
+ const struct GNUNET_DHT_ClientPutMessage *dht_msg)
{
- const struct GNUNET_DHT_ClientPutMessage *dht_msg;
+ struct ClientHandle *ch = cls;
+ struct GNUNET_CONTAINER_BloomFilter *peer_bf;
uint16_t size;
-
- size = ntohs (message->size);
- if (size < sizeof (struct GNUNET_DHT_ClientPutMessage))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- }
- dht_msg = (const struct GNUNET_DHT_ClientPutMessage *) message;
+ struct GNUNET_MQ_Envelope *env;
+ struct GNUNET_DHT_ClientPutConfirmationMessage *conf;
+
+ size = ntohs (dht_msg->header.size);
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop ("# PUT requests received from clients"),
+ 1,
+ GNUNET_NO);
+ LOG_TRAFFIC (GNUNET_ERROR_TYPE_DEBUG,
+ "CLIENT-PUT %s\n",
+ GNUNET_h2s_full (&dht_msg->key));
/* give to local clients */
- GDS_CLIENT_handle_reply (GNUNET_TIME_absolute_ntoh (dht_msg->expiration),
- &dht_msg->key,
- 0, NULL,
- 0, NULL,
- ntohl (dht_msg->type),
- size - sizeof (struct GNUNET_DHT_ClientPutMessage),
- &dht_msg[1]);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Handling local PUT of %u-bytes for query %s\n",
+ size - sizeof (struct GNUNET_DHT_ClientPutMessage),
+ GNUNET_h2s (&dht_msg->key));
+ GDS_CLIENTS_handle_reply (GNUNET_TIME_absolute_ntoh (dht_msg->expiration),
+ &dht_msg->key,
+ 0,
+ NULL,
+ 0,
+ NULL,
+ ntohl (dht_msg->type),
+ size - sizeof (struct GNUNET_DHT_ClientPutMessage),
+ &dht_msg[1]);
/* store locally */
- GST_DATACACHE_handle_put (GNUNET_TIME_absolute_ntoh (dht_msg->expiration),
- &dht_msg->key,
- 0, NULL,
- ntohl (dht_msg->type),
- size - sizeof (struct GNUNET_DHT_ClientPutMessage),
- &dht_msg[1]);
+ GDS_DATACACHE_handle_put (GNUNET_TIME_absolute_ntoh (dht_msg->expiration),
+ &dht_msg->key,
+ 0,
+ NULL,
+ ntohl (dht_msg->type),
+ size - sizeof (struct GNUNET_DHT_ClientPutMessage),
+ &dht_msg[1]);
/* route to other peers */
- GST_NEIGHBOURS_handle_put (ntohl (dht_msg->type),
- ntohl (dht_msg->options),
- ntohl (dht_msg->desired_replication_level),
- GNUNET_TIME_absolute_ntoh (dht_msg->expiration),
- &dht_msg->key,
- &dht_msg[1],
- size - sizeof (struct GNUNET_DHT_ClientPutMessage));
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ peer_bf
+ = GNUNET_CONTAINER_bloomfilter_init (NULL,
+ DHT_BLOOM_SIZE,
+ GNUNET_CONSTANTS_BLOOMFILTER_K);
+ GDS_NEIGHBOURS_handle_put (ntohl (dht_msg->type),
+ ntohl (dht_msg->options),
+ ntohl (dht_msg->desired_replication_level),
+ GNUNET_TIME_absolute_ntoh (dht_msg->expiration),
+ 0 /* hop count */,
+ peer_bf,
+ &dht_msg->key,
+ 0,
+ NULL,
+ &dht_msg[1],
+ size - sizeof (struct GNUNET_DHT_ClientPutMessage));
+ GDS_CLIENTS_process_put (ntohl (dht_msg->options),
+ ntohl (dht_msg->type),
+ 0,
+ ntohl (dht_msg->desired_replication_level),
+ 1,
+ GDS_NEIGHBOURS_get_id(),
+ GNUNET_TIME_absolute_ntoh (dht_msg->expiration),
+ &dht_msg->key,
+ &dht_msg[1],
+ size - sizeof (struct GNUNET_DHT_ClientPutMessage));
+ GNUNET_CONTAINER_bloomfilter_free (peer_bf);
+ env = GNUNET_MQ_msg (conf,
+ GNUNET_MESSAGE_TYPE_DHT_CLIENT_PUT_OK);
+ conf->reserved = htonl (0);
+ conf->unique_id = dht_msg->unique_id;
+ GNUNET_MQ_send (ch->mq,
+ env);
+ GNUNET_SERVICE_client_continue (ch->client);
}
/**
- * Handler for any generic DHT messages, calls the appropriate handler
- * depending on message type, sends confirmation if responses aren't otherwise
- * expected.
+ * Check DHT GET messages from the client.
*
- * @param cls closure for the service
- * @param client the client we received this message from
+ * @param cls the client we received this message from
* @param message the actual message received
+ * @return #GNUNET_OK (always)
+ */
+static int
+check_dht_local_get (void *cls,
+ const struct GNUNET_DHT_ClientGetMessage *get)
+{
+ /* always well-formed */
+ return GNUNET_OK;
+}
+
+
+/**
+ * Handle a result from local datacache for a GET operation.
+ *
+ * @param cls the `struct ClientHandle` of the client doing the query
+ * @param type type of the block
+ * @param expiration_time when does the content expire
+ * @param key key for the content
+ * @param put_path_length number of entries in @a put_path
+ * @param put_path peers the original PUT traversed (if tracked)
+ * @param get_path_length number of entries in @a get_path
+ * @param get_path peers this reply has traversed so far (if tracked)
+ * @param data payload of the reply
+ * @param data_size number of bytes in @a data
*/
static void
-handle_dht_local_get (void *cls, struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+handle_local_result (void *cls,
+ enum GNUNET_BLOCK_Type type,
+ struct GNUNET_TIME_Absolute expiration_time,
+ const struct GNUNET_HashCode *key,
+ unsigned int put_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *get_path,
+ const void *data,
+ size_t data_size)
{
- const struct GNUNET_DHT_ClientGetMessage *get;
- const struct GNUNET_MessageHeader *enc_msg;
+ // FIXME: this needs some clean up: inline the function,
+ // possibly avoid even looking up the client!
+ GDS_CLIENTS_handle_reply (expiration_time,
+ key,
+ 0, NULL,
+ put_path_length, put_path,
+ type,
+ data_size, data);
+}
+
+/**
+ * Handler for DHT GET messages from the client.
+ *
+ * @param cls the client we received this message from
+ * @param message the actual message received
+ */
+static void
+handle_dht_local_get (void *cls,
+ const struct GNUNET_DHT_ClientGetMessage *get)
+{
+ struct ClientHandle *ch = cls;
struct ClientQueryRecord *cqr;
size_t xquery_size;
- const char* xquery;
+ const char *xquery;
uint16_t size;
- size = ntohs (message->size);
- if (size < sizeof (struct GNUNET_DHT_ClientGetMessage))
- {
- GNUNET_break (0);
- GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
- return;
- }
+ size = ntohs (get->header.size);
xquery_size = size - sizeof (struct GNUNET_DHT_ClientGetMessage);
- get = (const struct GNUNET_DHT_ClientGetMessage *) message;
- xquery = (const char*) &get[1];
+ xquery = (const char *) &get[1];
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop
+ ("# GET requests received from clients"), 1,
+ GNUNET_NO);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received GET request for %s from local client %p, xq: %.*s\n",
+ GNUNET_h2s (&get->key),
+ ch->client,
+ xquery_size,
+ xquery);
+ LOG_TRAFFIC (GNUNET_ERROR_TYPE_DEBUG,
+ "CLIENT-GET %s\n",
+ GNUNET_h2s_full (&get->key));
-
cqr = GNUNET_malloc (sizeof (struct ClientQueryRecord) + xquery_size);
cqr->key = get->key;
- cqr->client = find_active_client (client);
- cqr->xquery = (void*) &cqr[1];
- memcpy (&cqr[1], xquery, xquery_size);
- cqr->hnode = GNUNET_CONTAINER_heap_insert (retry_heap, cqr, 0);
- cqr->retry_frequency = GNUNET_TIME_UNIT_MILLISECONDS;
+ cqr->ch = ch;
+ cqr->xquery = (void *) &cqr[1];
+ GNUNET_memcpy (&cqr[1], xquery, xquery_size);
+ cqr->hnode = GNUNET_CONTAINER_heap_insert (retry_heap, cqr, 0);
+ cqr->retry_frequency = GNUNET_TIME_UNIT_SECONDS;
cqr->retry_time = GNUNET_TIME_absolute_get ();
cqr->unique_id = get->unique_id;
cqr->xquery_size = xquery_size;
cqr->replication = ntohl (get->desired_replication_level);
cqr->msg_options = ntohl (get->options);
- cqr->msg_type = ntohl (get->type);
- GNUNET_CONTAINER_multihashmap_put (forward_map, KEY, cqr,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ cqr->type = ntohl (get->type);
+ GNUNET_CONTAINER_DLL_insert (ch->cqr_head,
+ ch->cqr_tail,
+ cqr);
+ GNUNET_CONTAINER_multihashmap_put (forward_map,
+ &cqr->key,
+ cqr,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ GDS_CLIENTS_process_get (ntohl (get->options),
+ ntohl (get->type),
+ 0,
+ ntohl (get->desired_replication_level),
+ 1,
+ GDS_NEIGHBOURS_get_id(),
+ &get->key);
/* start remote requests */
- if (GNUNET_SCHEDULER_NO_TASK != retry_task)
+ if (NULL != retry_task)
GNUNET_SCHEDULER_cancel (retry_task);
- retry_task = GNUNET_SCHEDULER_add_now (&transmit_next_request_task, NULL);
+ retry_task = GNUNET_SCHEDULER_add_now (&transmit_next_request_task,
+ NULL);
/* perform local lookup */
GDS_DATACACHE_handle_get (&get->key,
- cqr->msg_type,
+ cqr->type,
cqr->xquery,
xquery_size,
- NULL, 0);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ NULL,
+ 0,
+ &handle_local_result,
+ ch);
+ GNUNET_SERVICE_client_continue (ch->client);
}
/**
- * Closure for 'remove_by_uid'.
+ * Closure for #find_by_unique_id().
*/
-struct RemoveByUidContext
+struct FindByUniqueIdContext
{
/**
- * Client that issued the removal request.
+ * Where to store the result, if found.
*/
- struct ClientList *client;
+ struct ClientQueryRecord *cqr;
- /**
- * Unique ID of the request.
- */
- uint64_t uid;
+ uint64_t unique_id;
};
/**
- * Iterator over hash map entries that frees all entries
- * that match the given client and UID.
+ * Function called for each existing DHT record for the given
+ * query. Checks if it matches the UID given in the closure
+ * and if so returns the entry as a result.
*
- * @param cls UID and client to search for in source routes
- * @param key current key code
- * @param value value in the hash map, a ClientQueryRecord
- * @return GNUNET_YES (we should continue to iterate)
+ * @param cls the search context
+ * @param key query for the lookup (not used)
+ * @param value the `struct ClientQueryRecord`
+ * @return #GNUNET_YES to continue iteration (result not yet found)
*/
static int
-remove_by_uid (void *cls, const GNUNET_HashCode * key, void *value)
+find_by_unique_id (void *cls,
+ const struct GNUNET_HashCode *key,
+ void *value)
{
- const struct RemoveByUidContext *ctx = cls;
- struct ClientQueryRecord *record = value;
+ struct FindByUniqueIdContext *fui_ctx = cls;
+ struct ClientQueryRecord *cqr = value;
- if (record->uid != ctx->uid)
+ if (cqr->unique_id != fui_ctx->unique_id)
return GNUNET_YES;
- return remove_client_records (ctx->client, key, record);
+ fui_ctx->cqr = cqr;
+ return GNUNET_NO;
}
/**
- * Handler for any generic DHT stop messages, calls the appropriate handler
- * depending on message type (if processed locally)
+ * Check "GET result seen" messages from the client.
*
- * @param cls closure for the service
- * @param client the client we received this message from
+ * @param cls the client we received this message from
* @param message the actual message received
+ * @return #GNUNET_OK if @a seen is well-formed
+ */
+static int
+check_dht_local_get_result_seen (void *cls,
+ const struct GNUNET_DHT_ClientGetResultSeenMessage *seen)
+{
+ uint16_t size;
+ unsigned int hash_count;
+
+ size = ntohs (seen->header.size);
+ hash_count = (size - sizeof (struct GNUNET_DHT_ClientGetResultSeenMessage)) / sizeof (struct GNUNET_HashCode);
+ if (size != sizeof (struct GNUNET_DHT_ClientGetResultSeenMessage) + hash_count * sizeof (struct GNUNET_HashCode))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ return GNUNET_OK;
+}
+
+
+/**
+ * Handler for "GET result seen" messages from the client.
*
+ * @param cls the client we received this message from
+ * @param message the actual message received
*/
static void
-handle_dht_local_get_stop (void *cls, struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+handle_dht_local_get_result_seen (void *cls,
+ const struct GNUNET_DHT_ClientGetResultSeenMessage *seen)
{
- const struct GNUNET_DHT_ClientGetStopMessage *dht_stop_msg =
- (const struct GNUNET_DHT_ClientGetStopMessage *) message;
-
- ctx.client = find_active_client (client);
- ctx.uid = &dht_stop_msg.unique_id);
+ struct ClientHandle *ch = cls;
+ uint16_t size;
+ unsigned int hash_count;
+ unsigned int old_count;
+ const struct GNUNET_HashCode *hc;
+ struct FindByUniqueIdContext fui_ctx;
+ struct ClientQueryRecord *cqr;
+
+ size = ntohs (seen->header.size);
+ hash_count = (size - sizeof (struct GNUNET_DHT_ClientGetResultSeenMessage)) / sizeof (struct GNUNET_HashCode);
+ hc = (const struct GNUNET_HashCode*) &seen[1];
+ fui_ctx.unique_id = seen->unique_id;
+ fui_ctx.cqr = NULL;
GNUNET_CONTAINER_multihashmap_get_multiple (forward_map,
- &dht_stop_msg->key,
- &remove_by_uid,
- &ctx);
- GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ &seen->key,
+ &find_by_unique_id,
+ &fui_ctx);
+ if (NULL == (cqr = fui_ctx.cqr))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVICE_client_drop (ch->client);
+ return;
+ }
+ /* finally, update 'seen' list */
+ old_count = cqr->seen_replies_count;
+ GNUNET_array_grow (cqr->seen_replies,
+ cqr->seen_replies_count,
+ cqr->seen_replies_count + hash_count);
+ GNUNET_memcpy (&cqr->seen_replies[old_count],
+ hc,
+ sizeof (struct GNUNET_HashCode) * hash_count);
}
/**
- * Task run to check for messages that need to be sent to a client.
+ * Closure for #remove_by_unique_id().
+ */
+struct RemoveByUniqueIdContext
+{
+ /**
+ * Client that issued the removal request.
+ */
+ struct ClientHandle *ch;
+
+ /**
+ * Unique ID of the request.
+ */
+ uint64_t unique_id;
+};
+
+
+/**
+ * Iterator over hash map entries that frees all entries
+ * that match the given client and unique ID.
*
- * @param client a ClientList, containing the client and any messages to be sent to it
+ * @param cls unique ID and client to search for in source routes
+ * @param key current key code
+ * @param value value in the hash map, a ClientQueryRecord
+ * @return #GNUNET_YES (we should continue to iterate)
*/
-static void
-process_pending_messages (struct ClientList *client);
+static int
+remove_by_unique_id (void *cls,
+ const struct GNUNET_HashCode *key,
+ void *value)
+{
+ const struct RemoveByUniqueIdContext *ctx = cls;
+ struct ClientQueryRecord *cqr = value;
+
+ if (cqr->unique_id != ctx->unique_id)
+ return GNUNET_YES;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Removing client %p's record for key %s (by unique id)\n",
+ ctx->ch->client,
+ GNUNET_h2s (key));
+ remove_client_record (cqr);
+ return GNUNET_YES;
+}
/**
- * Callback called as a result of issuing a GNUNET_SERVER_notify_transmit_ready
- * request. A ClientList is passed as closure, take the head of the list
- * and copy it into buf, which has the result of sending the message to the
- * client.
+ * Handler for any generic DHT stop messages, calls the appropriate handler
+ * depending on message type (if processed locally)
*
- * @param cls closure to this call
- * @param size maximum number of bytes available to send
- * @param buf where to copy the actual message to
+ * @param cls client we received this message from
+ * @param message the actual message received
*
- * @return the number of bytes actually copied, 0 indicates failure
*/
-static size_t
-send_reply_to_client (void *cls, size_t size, void *buf)
+static void
+handle_dht_local_get_stop (void *cls,
+ const struct GNUNET_DHT_ClientGetStopMessage *dht_stop_msg)
{
- struct ClientList *client = cls;
- char *cbuf = buf;
- struct PendingMessage *reply;
- size_t off;
- size_t msize;
-
- client->transmit_handle = NULL;
- if (buf == NULL)
- {
- /* client disconnected */
- return 0;
- }
- off = 0;
- while ((NULL != (reply = client->pending_head)) &&
- (size >= off + (msize = ntohs (reply->msg->size))))
- {
- GNUNET_CONTAINER_DLL_remove (client->pending_head, client->pending_tail,
- reply);
- memcpy (&cbuf[off], reply->msg, msize);
- GNUNET_free (reply);
- off += msize;
- }
- process_pending_messages (client);
- return off;
+ struct ClientHandle *ch = cls;
+ struct RemoveByUniqueIdContext ctx;
+
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop
+ ("# GET STOP requests received from clients"), 1,
+ GNUNET_NO);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received GET STOP request for %s from local client %p\n",
+ GNUNET_h2s (&dht_stop_msg->key),
+ ch->client);
+ ctx.ch = ch;
+ ctx.unique_id = dht_stop_msg->unique_id;
+ GNUNET_CONTAINER_multihashmap_get_multiple (forward_map,
+ &dht_stop_msg->key,
+ &remove_by_unique_id,
+ &ctx);
+ GNUNET_SERVICE_client_continue (ch->client);
}
/**
- * Task run to check for messages that need to be sent to a client.
+ * Handler for monitor start messages
+ *
+ * @param cls the client we received this message from
+ * @param msg the actual message received
*
- * @param client a ClientList, containing the client and any messages to be sent to it
*/
static void
-process_pending_messages (struct ClientList *client)
+handle_dht_local_monitor (void *cls,
+ const struct GNUNET_DHT_MonitorStartStopMessage *msg)
{
- if ((client->pending_head == NULL) || (client->transmit_handle != NULL))
- return;
- client->transmit_handle =
- GNUNET_SERVER_notify_transmit_ready (client->client_handle,
- ntohs (client->pending_head->
- msg->size),
- GNUNET_TIME_UNIT_FOREVER_REL,
- &send_reply_to_client, client);
+ struct ClientHandle *ch = cls;
+ struct ClientMonitorRecord *r;
+
+ r = GNUNET_new (struct ClientMonitorRecord);
+ r->ch = ch;
+ r->type = ntohl (msg->type);
+ r->get = ntohs (msg->get);
+ r->get_resp = ntohs (msg->get_resp);
+ r->put = ntohs (msg->put);
+ if (0 == ntohs (msg->filter_key))
+ {
+ r->key = NULL;
+ }
+ else
+ {
+ r->key = GNUNET_new (struct GNUNET_HashCode);
+ GNUNET_memcpy (r->key,
+ &msg->key,
+ sizeof (struct GNUNET_HashCode));
+ }
+ GNUNET_CONTAINER_DLL_insert (monitor_head,
+ monitor_tail,
+ r);
+ GNUNET_SERVICE_client_continue (ch->client);
}
/**
- * Add a PendingMessage to the clients list of messages to be sent
+ * Handler for monitor stop messages
*
- * @param client the active client to send the message to
- * @param pending_message the actual message to send
+ * @param cls the client we received this message from
+ * @param msg the actual message received
*/
static void
-add_pending_message (struct ClientList *client,
- struct PendingMessage *pending_message)
+handle_dht_local_monitor_stop (void *cls,
+ const struct GNUNET_DHT_MonitorStartStopMessage *msg)
{
- GNUNET_CONTAINER_DLL_insert_tail (client->pending_head, client->pending_tail,
- pending_message);
- process_pending_messages (client);
+ struct ClientHandle *ch = cls;
+ struct ClientMonitorRecord *r;
+ int keys_match;
+
+ GNUNET_SERVICE_client_continue (ch->client);
+ for (r = monitor_head; NULL != r; r = r->next)
+ {
+ if (NULL == r->key)
+ {
+ keys_match = (0 == ntohs(msg->filter_key));
+ }
+ else
+ {
+ keys_match = ( (0 != ntohs(msg->filter_key)) &&
+ (! memcmp (r->key,
+ &msg->key,
+ sizeof(struct GNUNET_HashCode))) );
+ }
+ if ( (ch == r->ch) &&
+ (ntohl(msg->type) == r->type) &&
+ (r->get == msg->get) &&
+ (r->get_resp == msg->get_resp) &&
+ (r->put == msg->put) &&
+ keys_match )
+ {
+ GNUNET_CONTAINER_DLL_remove (monitor_head,
+ monitor_tail,
+ r);
+ GNUNET_free_non_null (r->key);
+ GNUNET_free (r);
+ return; /* Delete only ONE entry */
+ }
+ }
}
/**
- * Closure for 'forward_reply'
+ * Closure for #forward_reply()
*/
struct ForwardReplyContext
{
/**
- * Actual message to send to matching clients.
+ * Expiration time of the reply.
*/
- struct PendingMessage *pm;
+ struct GNUNET_TIME_Absolute expiration;
/**
- * Embedded payload.
+ * GET path taken.
*/
- const void *data;
+ const struct GNUNET_PeerIdentity *get_path;
/**
- * Type of the data.
+ * PUT path taken.
*/
- enum GNUNET_BLOCK_Type type;
+ const struct GNUNET_PeerIdentity *put_path;
+
+ /**
+ * Embedded payload.
+ */
+ const void *data;
/**
* Number of bytes in data.
size_t data_size;
/**
- * Do we need to copy 'pm' because it was already used?
+ * Number of entries in @e get_path.
*/
- int do_copy;
+ unsigned int get_path_length;
+
+ /**
+ * Number of entries in @e put_path.
+ */
+ unsigned int put_path_length;
+
+ /**
+ * Type of the data.
+ */
+ enum GNUNET_BLOCK_Type type;
};
* @param cls the 'struct ForwardReplyContext'
* @param key current key
* @param value value in the hash map, a ClientQueryRecord
- * @return GNUNET_YES (we should continue to iterate),
- * if the result is mal-formed, GNUNET_NO
+ * @return #GNUNET_YES (we should continue to iterate),
+ * if the result is mal-formed, #GNUNET_NO
*/
static int
-forward_reply (void *cls, const GNUNET_HashCode * key, void *value)
+forward_reply (void *cls,
+ const struct GNUNET_HashCode *key,
+ void *value)
{
struct ForwardReplyContext *frc = cls;
struct ClientQueryRecord *record = value;
- struct PendingMessage *pm;
- struct ReplyMessage *reply;
+ struct GNUNET_MQ_Envelope *env;
+ struct GNUNET_DHT_ClientResultMessage *reply;
enum GNUNET_BLOCK_EvaluationResult eval;
int do_free;
- GNUNET_HashCode ch;
- unsigned int i;
-
+ struct GNUNET_HashCode ch;
+ struct GNUNET_PeerIdentity *paths;
+
+ LOG_TRAFFIC (GNUNET_ERROR_TYPE_DEBUG,
+ "CLIENT-RESULT %s\n",
+ GNUNET_h2s_full (key));
if ( (record->type != GNUNET_BLOCK_TYPE_ANY) &&
- (record->type != frc->type) )
- return GNUNET_YES; /* type mismatch */
- GNUNET_CRYPTO_hash (frc->data,
- frc->data_size,
- &ch);
- for (i=0;i<record->seen_replies_count;i++)
+ (record->type != frc->type))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Record type missmatch, not passing request for key %s to local client\n",
+ GNUNET_h2s (key));
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop
+ ("# Key match, type mismatches in REPLY to CLIENT"),
+ 1, GNUNET_NO);
+ return GNUNET_YES; /* type mismatch */
+ }
+ GNUNET_CRYPTO_hash (frc->data, frc->data_size, &ch);
+ for (unsigned int i = 0; i < record->seen_replies_count; i++)
if (0 == memcmp (&record->seen_replies[i],
- &ch,
- sizeof (GNUNET_HashCode)))
- return GNUNET_YES; /* duplicate */
- eval =
- GNUNET_BLOCK_evaluate (GDS_block_context,
- record->type, key,
- NULL, 0,
- record->xquery,
- record->xquery_size,
- frc->data,
- frc->data_size);
+ &ch,
+ sizeof (struct GNUNET_HashCode)))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Duplicate reply, not passing request for key %s to local client\n",
+ GNUNET_h2s (key));
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop
+ ("# Duplicate REPLIES to CLIENT request dropped"),
+ 1, GNUNET_NO);
+ return GNUNET_YES; /* duplicate */
+ }
+ eval
+ = GNUNET_BLOCK_evaluate (GDS_block_context,
+ record->type,
+ GNUNET_BLOCK_EO_NONE,
+ key,
+ NULL,
+ 0,
+ record->xquery,
+ record->xquery_size,
+ frc->data,
+ frc->data_size);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Evaluation result is %d for key %s for local client's query\n",
+ (int) eval,
+ GNUNET_h2s (key));
switch (eval)
{
case GNUNET_BLOCK_EVALUATION_OK_LAST:
do_free = GNUNET_YES;
break;
case GNUNET_BLOCK_EVALUATION_OK_MORE:
- GNUNET_ARRAY_append (record->seen_replies,
- record->seen_replies_count,
- ch);
+ GNUNET_array_append (record->seen_replies,
+ record->seen_replies_count,
+ ch);
do_free = GNUNET_NO;
break;
case GNUNET_BLOCK_EVALUATION_OK_DUPLICATE:
case GNUNET_BLOCK_EVALUATION_REQUEST_INVALID:
GNUNET_break (0);
return GNUNET_NO;
+ case GNUNET_BLOCK_EVALUATION_RESULT_IRRELEVANT:
+ return GNUNET_YES;
case GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED:
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "Unsupported block type (%u) in request!\n",
- record->type);
+ _("Unsupported block type (%u) in request!\n"), record->type);
+ return GNUNET_NO;
+ default:
+ GNUNET_break (0);
return GNUNET_NO;
}
- if (GNUNET_NO == frc->do_copy)
- {
- /* first time, we can use the original data */
- pm = frc->pm;
- frc->do_copy = GNUNET_YES;
- }
- else
- {
- /* two clients waiting for same reply, must copy for queueing */
- pm = GNUNET_malloc (sizeof (struct PendingMessage) +
- ntohs (frc->pm->msg->size));
- memcpy (pm, frc->pm,
- sizeof (struct PendingMessage) + ntohs (frc->pm->msg->size));
- pm->next = pm->prev = NULL;
- }
- reply = (struct ReplyMessage*) &pm[1];
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop ("# RESULTS queued for clients"),
+ 1,
+ GNUNET_NO);
+ env = GNUNET_MQ_msg_extra (reply,
+ frc->data_size +
+ (frc->get_path_length + frc->put_path_length) * sizeof (struct GNUNET_PeerIdentity),
+ GNUNET_MESSAGE_TYPE_DHT_CLIENT_RESULT);
+ reply->type = htonl (frc->type);
+ reply->get_path_length = htonl (frc->get_path_length);
+ reply->put_path_length = htonl (frc->put_path_length);
reply->unique_id = record->unique_id;
- add_pending_message (record->client, pm);
+ reply->expiration = GNUNET_TIME_absolute_hton (frc->expiration);
+ reply->key = *key;
+ paths = (struct GNUNET_PeerIdentity *) &reply[1];
+ GNUNET_memcpy (paths,
+ frc->put_path,
+ sizeof (struct GNUNET_PeerIdentity) * frc->put_path_length);
+ GNUNET_memcpy (&paths[frc->put_path_length],
+ frc->get_path,
+ sizeof (struct GNUNET_PeerIdentity) * frc->get_path_length);
+ GNUNET_memcpy (&paths[frc->get_path_length + frc->put_path_length],
+ frc->data,
+ frc->data_size);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending reply to query %s for client %p\n",
+ GNUNET_h2s (key),
+ record->ch->client);
+ GNUNET_MQ_send (record->ch->mq,
+ env);
if (GNUNET_YES == do_free)
- remove_client_records (record->client, key, record);
+ remove_client_record (record);
return GNUNET_YES;
}
*
* @param expiration when will the reply expire
* @param key the query this reply is for
- * @param get_path_length number of peers in 'get_path'
+ * @param get_path_length number of peers in @a get_path
* @param get_path path the reply took on get
- * @param put_path_length number of peers in 'put_path'
+ * @param put_path_length number of peers in @a put_path
* @param put_path path the reply took on put
* @param type type of the reply
- * @param data_size number of bytes in 'data'
+ * @param data_size number of bytes in @a data
* @param data application payload data
*/
void
-GDS_CLIENT_handle_reply (struct GNUNET_TIME_Absolute expiration,
- const GNUNET_HashCode *key,
- unsigned int get_path_length,
- const struct GNUNET_PeerIdentity *get_path,
- unsigned int put_path_length,
- const struct GNUNET_PeerIdentity *put_path,
- enum GNUNET_BLOCK_Type type,
- size_t data_size,
- const void *data)
+GDS_CLIENTS_handle_reply (struct GNUNET_TIME_Absolute expiration,
+ const struct GNUNET_HashCode *key,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *get_path,
+ unsigned int put_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ enum GNUNET_BLOCK_Type type,
+ size_t data_size,
+ const void *data)
{
struct ForwardReplyContext frc;
- struct PendingMessage *pm;
- struct ReplyMessage *reply;
- struct GNUNET_PeerIdentity *paths;
size_t msize;
- if (NULL ==
- GNUNET_CONTAINER_multihashmap_get (foward_map, key))
- return; /* no matching request, fast exit! */
- msize = sizeof(struct ReplyMessage) + data_size +
+ msize = sizeof (struct GNUNET_DHT_ClientResultMessage) + data_size +
(get_path_length + put_path_length) * sizeof (struct GNUNET_PeerIdentity);
if (msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Could not pass reply to client, message too big!\n"));
- return;
- }
- pm = (struct PendingMessage *) GNUNET_malloc (msize + sizeof (struct PendingMessage));
- reply = (struct ReplyMessage*) &pm[1];
- pm->msg = &reply->header;
- reply->header.size = htons ((uint16_t) msize);
- reply->header.type = htons (GNUNET_MESSAGE_TYPE_DHT_CLIENT_RESULT);
- reply->type = htonl (type);
- reply->get_path_length = htonl (get_path_length);
- reply->put_path_length = htonl (put_path_length);
- reply->unique_id = 0; /* filled in later */
- reply->expiration = GNUNET_TIME_absolute_hton (expiration);
- reply->key = *key;
- paths = (struct GNUNET_PeerIdentity*) &reply[1];
- mempcy (paths, get_path,
- sizeof (struct GNUNET_PeerIdentity) * get_path_length);
- mempcy (&paths[get_path_length],
- put_path, sizeof (struct GNUNET_PeerIdentity) * put_path_length);
- memcpy (&paths[get_path_length + put_path_length],
- data,
- data_size);
- frc.do_copy = GNUNET_NO;
- frc.pm = pm;
+ {
+ GNUNET_break (0);
+ return;
+ }
+ if (NULL == GNUNET_CONTAINER_multihashmap_get (forward_map,
+ key))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "No matching client for reply for key %s\n",
+ GNUNET_h2s (key));
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop ("# REPLIES ignored for CLIENTS (no match)"),
+ 1,
+ GNUNET_NO);
+ return; /* no matching request, fast exit! */
+ }
+ frc.expiration = expiration;
+ frc.get_path = get_path;
+ frc.put_path = put_path;
frc.data = data;
frc.data_size = data_size;
+ frc.get_path_length = get_path_length;
+ frc.put_path_length = put_path_length;
frc.type = type;
- GNUNET_CONTAINER_multihashmap_get_multiple (foward_map, key,
- &forward_reply,
- &frc);
- if (GNUNET_NO == frc.do_copy)
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Forwarding reply for key %s to client\n",
+ GNUNET_h2s (key));
+ GNUNET_CONTAINER_multihashmap_get_multiple (forward_map,
+ key,
+ &forward_reply,
+ &frc);
+
+}
+
+
+/**
+ * Check if some client is monitoring GET messages and notify
+ * them in that case.
+ *
+ * @param options Options, for instance RecordRoute, DemultiplexEverywhere.
+ * @param type The type of data in the request.
+ * @param hop_count Hop count so far.
+ * @param path_length number of entries in path (or 0 if not recorded).
+ * @param path peers on the GET path (or NULL if not recorded).
+ * @param desired_replication_level Desired replication level.
+ * @param key Key of the requested data.
+ */
+void
+GDS_CLIENTS_process_get (uint32_t options,
+ enum GNUNET_BLOCK_Type type,
+ uint32_t hop_count,
+ uint32_t desired_replication_level,
+ unsigned int path_length,
+ const struct GNUNET_PeerIdentity *path,
+ const struct GNUNET_HashCode * key)
+{
+ struct ClientMonitorRecord *m;
+ struct ClientHandle **cl;
+ unsigned int cl_size;
+
+ cl = NULL;
+ cl_size = 0;
+ for (m = monitor_head; NULL != m; m = m->next)
+ {
+ if ( ( (GNUNET_BLOCK_TYPE_ANY == m->type) ||
+ (m->type == type) ) &&
+ ( (NULL == m->key) ||
+ (0 == memcmp (key,
+ m->key,
+ sizeof(struct GNUNET_HashCode))) ) )
{
- /* did not match any of the requests, free! */
- GNUNET_free (buf);
+ struct GNUNET_MQ_Envelope *env;
+ struct GNUNET_DHT_MonitorGetMessage *mmsg;
+ struct GNUNET_PeerIdentity *msg_path;
+ size_t msize;
+ unsigned int i;
+
+ /* Don't send duplicates */
+ for (i = 0; i < cl_size; i++)
+ if (cl[i] == m->ch)
+ break;
+ if (i < cl_size)
+ continue;
+ GNUNET_array_append (cl,
+ cl_size,
+ m->ch);
+
+ msize = path_length * sizeof (struct GNUNET_PeerIdentity);
+ env = GNUNET_MQ_msg_extra (mmsg,
+ msize,
+ GNUNET_MESSAGE_TYPE_DHT_MONITOR_GET);
+ mmsg->options = htonl(options);
+ mmsg->type = htonl(type);
+ mmsg->hop_count = htonl(hop_count);
+ mmsg->desired_replication_level = htonl(desired_replication_level);
+ mmsg->get_path_length = htonl(path_length);
+ mmsg->key = *key;
+ msg_path = (struct GNUNET_PeerIdentity *) &mmsg[1];
+ GNUNET_memcpy (msg_path,
+ path,
+ path_length * sizeof (struct GNUNET_PeerIdentity));
+ GNUNET_MQ_send (m->ch->mq,
+ env);
}
+ }
+ GNUNET_free_non_null (cl);
}
/**
- * Initialize client subsystem.
+ * Check if some client is monitoring GET RESP messages and notify
+ * them in that case.
*
- * @param server the initialized server
+ * @param type The type of data in the result.
+ * @param get_path Peers on GET path (or NULL if not recorded).
+ * @param get_path_length number of entries in get_path.
+ * @param put_path peers on the PUT path (or NULL if not recorded).
+ * @param put_path_length number of entries in get_path.
+ * @param exp Expiration time of the data.
+ * @param key Key of the data.
+ * @param data Pointer to the result data.
+ * @param size Number of bytes in @a data.
*/
-void
-GDS_CLIENT_init (struct GNUNET_SERVER_Handle *server)
+void
+GDS_CLIENTS_process_get_resp (enum GNUNET_BLOCK_Type type,
+ const struct GNUNET_PeerIdentity *get_path,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ unsigned int put_path_length,
+ struct GNUNET_TIME_Absolute exp,
+ const struct GNUNET_HashCode * key,
+ const void *data,
+ size_t size)
{
- static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
- {&handle_dht_local_put, NULL,
- GNUNET_MESSAGE_TYPE_DHT_CLIENT_PUT, 0},
- {&handle_dht_local_get, NULL,
- GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET, 0},
- {&handle_dht_local_get_stop, NULL,
- GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET_STOP,
- sizeof (struct GNUNET_DHT_StopMessage) },
- {NULL, NULL, 0, 0}
- };
- forward_map = GNUNET_CONTAINER_multihashmap_create (1024);
- retry_heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
- GNUNET_SERVER_add_handlers (server, plugin_handlers);
- GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
+ struct ClientMonitorRecord *m;
+ struct ClientHandle **cl;
+ unsigned int cl_size;
+
+ cl = NULL;
+ cl_size = 0;
+ for (m = monitor_head; NULL != m; m = m->next)
+ {
+ if ((GNUNET_BLOCK_TYPE_ANY == m->type || m->type == type) &&
+ (NULL == m->key ||
+ memcmp (key, m->key, sizeof(struct GNUNET_HashCode)) == 0))
+ {
+ struct GNUNET_MQ_Envelope *env;
+ struct GNUNET_DHT_MonitorGetRespMessage *mmsg;
+ struct GNUNET_PeerIdentity *path;
+ size_t msize;
+ unsigned int i;
+
+ /* Don't send duplicates */
+ for (i = 0; i < cl_size; i++)
+ if (cl[i] == m->ch)
+ break;
+ if (i < cl_size)
+ continue;
+ GNUNET_array_append (cl,
+ cl_size,
+ m->ch);
+
+ msize = size;
+ msize += (get_path_length + put_path_length)
+ * sizeof (struct GNUNET_PeerIdentity);
+ env = GNUNET_MQ_msg_extra (mmsg,
+ msize,
+ GNUNET_MESSAGE_TYPE_DHT_MONITOR_GET_RESP);
+ mmsg->type = htonl(type);
+ mmsg->put_path_length = htonl(put_path_length);
+ mmsg->get_path_length = htonl(get_path_length);
+ mmsg->expiration_time = GNUNET_TIME_absolute_hton(exp);
+ mmsg->key = *key;
+ path = (struct GNUNET_PeerIdentity *) &mmsg[1];
+ GNUNET_memcpy (path,
+ put_path,
+ put_path_length * sizeof (struct GNUNET_PeerIdentity));
+ GNUNET_memcpy (path,
+ get_path,
+ get_path_length * sizeof (struct GNUNET_PeerIdentity));
+ GNUNET_memcpy (&path[get_path_length],
+ data,
+ size);
+ GNUNET_MQ_send (m->ch->mq,
+ env);
+ }
+ }
+ GNUNET_free_non_null (cl);
}
/**
- * Shutdown client subsystem.
+ * Check if some client is monitoring PUT messages and notify
+ * them in that case.
+ *
+ * @param options Options, for instance RecordRoute, DemultiplexEverywhere.
+ * @param type The type of data in the request.
+ * @param hop_count Hop count so far.
+ * @param path_length number of entries in path (or 0 if not recorded).
+ * @param path peers on the PUT path (or NULL if not recorded).
+ * @param desired_replication_level Desired replication level.
+ * @param exp Expiration time of the data.
+ * @param key Key under which data is to be stored.
+ * @param data Pointer to the data carried.
+ * @param size Number of bytes in data.
*/
void
-GDS_CLIENT_done ()
+GDS_CLIENTS_process_put (uint32_t options,
+ enum GNUNET_BLOCK_Type type,
+ uint32_t hop_count,
+ uint32_t desired_replication_level,
+ unsigned int path_length,
+ const struct GNUNET_PeerIdentity *path,
+ struct GNUNET_TIME_Absolute exp,
+ const struct GNUNET_HashCode *key,
+ const void *data,
+ size_t size)
{
- GNUNET_assert (client_head == NULL);
- GNUNET_assert (client_tail == NULL);
- if (GNUNET_SCHEDULER_NO_TASK != retry_task)
+ struct ClientMonitorRecord *m;
+ struct ClientHandle **cl;
+ unsigned int cl_size;
+
+ cl = NULL;
+ cl_size = 0;
+ for (m = monitor_head; NULL != m; m = m->next)
+ {
+ if ((GNUNET_BLOCK_TYPE_ANY == m->type || m->type == type) &&
+ (NULL == m->key ||
+ memcmp (key, m->key, sizeof(struct GNUNET_HashCode)) == 0))
{
- GNUNET_SCHEDULER_cancel (retry_task);
- retry_task = GNUNET_SCHEDULER_NO_TASK;
+ struct GNUNET_MQ_Envelope *env;
+ struct GNUNET_DHT_MonitorPutMessage *mmsg;
+ struct GNUNET_PeerIdentity *msg_path;
+ size_t msize;
+ unsigned int i;
+
+ /* Don't send duplicates */
+ for (i = 0; i < cl_size; i++)
+ if (cl[i] == m->ch)
+ break;
+ if (i < cl_size)
+ continue;
+ GNUNET_array_append (cl,
+ cl_size,
+ m->ch);
+
+ msize = size;
+ msize += path_length * sizeof (struct GNUNET_PeerIdentity);
+ env = GNUNET_MQ_msg_extra (mmsg,
+ msize,
+ GNUNET_MESSAGE_TYPE_DHT_MONITOR_PUT);
+ mmsg->options = htonl(options);
+ mmsg->type = htonl(type);
+ mmsg->hop_count = htonl(hop_count);
+ mmsg->desired_replication_level = htonl (desired_replication_level);
+ mmsg->put_path_length = htonl (path_length);
+ mmsg->key = *key;
+ mmsg->expiration_time = GNUNET_TIME_absolute_hton (exp);
+ msg_path = (struct GNUNET_PeerIdentity *) &mmsg[1];
+ GNUNET_memcpy (msg_path,
+ path,
+ path_length * sizeof (struct GNUNET_PeerIdentity));
+ GNUNET_memcpy (&msg_path[path_length],
+ data,
+ size);
+ GNUNET_MQ_send (m->ch->mq,
+ env);
}
- GNUNET_assert (0 == GNUNET_CONTAINER_heap_get_size (retry_heap));
- GNUNET_CONTAINER_heap_destroy (retry_heap);
- retry_heap = NULL;
- GNUNET_assert (0 == GNUNET_CONTAINER_multihashmap_size (forward_map));
- GNUNET_CONTAINER_multihashmap_destroy (forward_map);
- forward_map = NULL;
+ }
+ GNUNET_free_non_null (cl);
}
-/* end of gnunet-service-dht_clients.c */
+/**
+ * Initialize client subsystem.
+ *
+ * @param server the initialized server
+ */
+static void
+GDS_CLIENTS_init ()
+{
+ forward_map
+ = GNUNET_CONTAINER_multihashmap_create (1024,
+ GNUNET_YES);
+ retry_heap
+ = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
+}
+
+
+/**
+ * Shutdown client subsystem.
+ */
+static void
+GDS_CLIENTS_stop ()
+{
+ if (NULL != retry_task)
+ {
+ GNUNET_SCHEDULER_cancel (retry_task);
+ retry_task = NULL;
+ }
+}
+
+
+/**
+ * Define "main" method using service macro.
+ *
+ * @param name name of the service, i.e. "dht" or "xdht"
+ * @param run name of the initializaton method for the service
+ */
+#define GDS_DHT_SERVICE_INIT(name,run) \
+ GNUNET_SERVICE_MAIN \
+ (name, \
+ GNUNET_SERVICE_OPTION_NONE, \
+ run, \
+ &client_connect_cb, \
+ &client_disconnect_cb, \
+ NULL, \
+ GNUNET_MQ_hd_var_size (dht_local_put, \
+ GNUNET_MESSAGE_TYPE_DHT_CLIENT_PUT, \
+ struct GNUNET_DHT_ClientPutMessage, \
+ NULL), \
+ GNUNET_MQ_hd_var_size (dht_local_get, \
+ GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET, \
+ struct GNUNET_DHT_ClientGetMessage, \
+ NULL), \
+ GNUNET_MQ_hd_fixed_size (dht_local_get_stop, \
+ GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET_STOP, \
+ struct GNUNET_DHT_ClientGetStopMessage, \
+ NULL), \
+ GNUNET_MQ_hd_fixed_size (dht_local_monitor, \
+ GNUNET_MESSAGE_TYPE_DHT_MONITOR_START, \
+ struct GNUNET_DHT_MonitorStartStopMessage, \
+ NULL), \
+ GNUNET_MQ_hd_fixed_size (dht_local_monitor_stop, \
+ GNUNET_MESSAGE_TYPE_DHT_MONITOR_STOP, \
+ struct GNUNET_DHT_MonitorStartStopMessage, \
+ NULL), \
+ GNUNET_MQ_hd_var_size (dht_local_get_result_seen, \
+ GNUNET_MESSAGE_TYPE_DHT_CLIENT_GET_RESULTS_KNOWN, \
+ struct GNUNET_DHT_ClientGetResultSeenMessage , \
+ NULL), \
+ GNUNET_MQ_handler_end ())
+
+
+/**
+ * MINIMIZE heap size (way below 128k) since this process doesn't need much.
+ */
+void __attribute__ ((destructor))
+GDS_CLIENTS_done ()
+{
+ if (NULL != retry_heap)
+ {
+ GNUNET_assert (0 == GNUNET_CONTAINER_heap_get_size (retry_heap));
+ GNUNET_CONTAINER_heap_destroy (retry_heap);
+ retry_heap = NULL;
+ }
+ if (NULL != forward_map)
+ {
+ GNUNET_assert (0 == GNUNET_CONTAINER_multihashmap_size (forward_map));
+ GNUNET_CONTAINER_multihashmap_destroy (forward_map);
+ forward_map = NULL;
+ }
+}
+
+/* end of gnunet-service-dht_clients.c */
projects / oweals / gnunet.git / blobdiff