X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=src%2Fdht%2Fgnunet-service-dht_clients.c;h=df56c010a57c7b1ed61c4fadb14f6a2805fd80e3;hb=5b32752cd7b02adcb8e6fec7798637638c6f63a0;hp=13102a9981165015443cf1a7419df5fe9956b4e8;hpb=0630a77f37cea3f7257f6b6ea846c75d40fac2dd;p=oweals%2Fgnunet.git diff --git a/src/dht/gnunet-service-dht_clients.c b/src/dht/gnunet-service-dht_clients.c index 13102a998..df56c010a 100644 --- a/src/dht/gnunet-service-dht_clients.c +++ b/src/dht/gnunet-service-dht_clients.c @@ -1,6 +1,6 @@ /* 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 @@ -14,8 +14,8 @@ 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. */ /** @@ -26,38 +26,21 @@ */ #include "platform.h" +#include "gnunet_constants.h" #include "gnunet_protocols.h" #include "gnunet_statistics_service.h" #include "gnunet-service-dht.h" -#include "gnunet-service-dht_clients.h" #include "gnunet-service-dht_datacache.h" #include "gnunet-service-dht_neighbours.h" -#include "dht_new.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__) /** @@ -65,57 +48,34 @@ struct PendingMessage * 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. @@ -125,7 +85,7 @@ struct ClientQueryRecord /** * 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) @@ -177,17 +137,114 @@ struct ClientQueryRecord /** - * List of active clients. + * 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 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; @@ -199,63 +256,55 @@ static struct GNUNET_CONTAINER_Heap *retry_heap; /** * 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_head; - 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, - *key); - GNUNET_free (record); - return GNUNET_YES; + ch = GNUNET_new (struct ClientHandle); + ch->client = client; + ch->mq = mq; + return ch; } @@ -264,36 +313,49 @@ remove_client_records (void *cls, const GNUNET_HashCode * key, void *value) * 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; - struct PendingMessage *reply; - - pos = find_active_client (client); - GNUNET_CONTAINER_DLL_remove (client_head, - client_tail, - pos); - if (pos->transmit_handle != NULL) - GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->transmit_handle); - while (NULL != (reply = pos->pending_head)) + struct ClientHandle *ch = app_ctx; + struct ClientQueryRecord *cqr; + struct ClientMonitorRecord *monitor; + + GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, + "Local client %p disconnects\n", + ch); + monitor = monitor_head; + while (NULL != monitor) + { + if (monitor->ch == ch) { - GNUNET_CONTAINER_DLL_remove (pos->pending_head, pos->pending_tail, - reply); - GNUNET_free (reply); + 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; } - GNUNET_CONTAINER_multihashmap_iterate (forward_map, - &remove_client_records, pos); - GNUNET_free (pos); + else + { + monitor = monitor->next; + } + } + 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. */ @@ -302,188 +364,433 @@ transmit_request (struct ClientQueryRecord *cqr) { int32_t reply_bf_mutator; struct GNUNET_CONTAINER_BloomFilter *reply_bf; - - 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); + 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, - NULL /* no peers blocked initially */); + 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 1h */ - cqr->retry_frequency = - GNUNET_TIME_relative_max (GNUNET_TIME_UNIT_HOURS, - GNUNET_TIME_relative_multiply (cqr->retry_frequency, 2)); + /* 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.rel_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 */ + 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]); + &dht_msg->key, + 0, + NULL, + 0, + NULL, + ntohl (dht_msg->type), + size - sizeof (struct GNUNET_DHT_ClientPutMessage), + &dht_msg[1]); /* store locally */ 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]); + &dht_msg->key, + 0, + NULL, + ntohl (dht_msg->type), + size - sizeof (struct GNUNET_DHT_ClientPutMessage), + &dht_msg[1]); /* route to other peers */ + 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 */, - NULL /* peer bloom filter */, - &dht_msg->key, - 0, NULL, - &dht_msg[1], - size - sizeof (struct GNUNET_DHT_ClientPutMessage)); - GNUNET_SERVER_receive_done (client, GNUNET_OK); + 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; + // 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->type = ntohl (get->type); - GNUNET_CONTAINER_multihashmap_put (forward_map, &get->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->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_unique_id'. + * Closure for #find_by_unique_id(). + */ +struct FindByUniqueIdContext +{ + /** + * Where to store the result, if found. + */ + struct ClientQueryRecord *cqr; + + uint64_t unique_id; +}; + + +/** + * 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 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 +find_by_unique_id (void *cls, + const struct GNUNET_HashCode *key, + void *value) +{ + struct FindByUniqueIdContext *fui_ctx = cls; + struct ClientQueryRecord *cqr = value; + + if (cqr->unique_id != fui_ctx->unique_id) + return GNUNET_YES; + fui_ctx->cqr = cqr; + return GNUNET_NO; +} + + +/** + * Check "GET result seen" messages from the client. + * + * @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_result_seen (void *cls, + const struct GNUNET_DHT_ClientGetResultSeenMessage *seen) +{ + 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, + &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); +} + + +/** + * Closure for #remove_by_unique_id(). */ struct RemoveByUniqueIdContext { /** * Client that issued the removal request. */ - struct ClientList *client; + struct ClientHandle *ch; /** * Unique ID of the request. @@ -493,23 +800,30 @@ struct RemoveByUniqueIdContext /** - * Iterator over hash map entries that frees all entries + * Iterator over hash map entries that frees all entries * that match the given client and unique ID. * * @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) + * @return #GNUNET_YES (we should continue to iterate) */ static int -remove_by_unique_id (void *cls, const GNUNET_HashCode * key, void *value) +remove_by_unique_id (void *cls, + const struct GNUNET_HashCode *key, + void *value) { const struct RemoveByUniqueIdContext *ctx = cls; - struct ClientQueryRecord *record = value; + struct ClientQueryRecord *cqr = value; - if (record->unique_id != ctx->unique_id) + if (cqr->unique_id != ctx->unique_id) return GNUNET_YES; - return remove_client_records (ctx->client, key, record); + 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; } @@ -517,135 +831,144 @@ remove_by_unique_id (void *cls, const GNUNET_HashCode * key, void *value) * Handler for any generic DHT stop messages, calls the appropriate handler * depending on message type (if processed locally) * - * @param cls closure for the service - * @param client the client we received this message from + * @param cls 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_stop (void *cls, + const struct GNUNET_DHT_ClientGetStopMessage *dht_stop_msg) { - const struct GNUNET_DHT_ClientGetStopMessage *dht_stop_msg = - (const struct GNUNET_DHT_ClientGetStopMessage *) message; + struct ClientHandle *ch = cls; struct RemoveByUniqueIdContext ctx; - - ctx.client = find_active_client (client); + + 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_SERVER_receive_done (client, GNUNET_OK); + &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. - * - * @param client a ClientList, containing the client and any messages to be sent to it - */ -static void -process_pending_messages (struct ClientList *client); - - -/** - * 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 monitor start messages * - * @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 the client we received this message from + * @param msg 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_monitor (void *cls, + const struct GNUNET_DHT_MonitorStartStopMessage *msg) { - struct ClientList *client = cls; - char *cbuf = buf; - struct PendingMessage *reply; - size_t off; - size_t msize; - - client->transmit_handle = NULL; - if (buf == NULL) + 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)) { - /* client disconnected */ - return 0; + r->key = NULL; } - off = 0; - while ((NULL != (reply = client->pending_head)) && - (size >= off + (msize = ntohs (reply->msg->size)))) + else { - GNUNET_CONTAINER_DLL_remove (client->pending_head, client->pending_tail, - reply); - memcpy (&cbuf[off], reply->msg, msize); - GNUNET_free (reply); - off += msize; + r->key = GNUNET_new (struct GNUNET_HashCode); + GNUNET_memcpy (r->key, + &msg->key, + sizeof (struct GNUNET_HashCode)); } - process_pending_messages (client); - return off; + GNUNET_CONTAINER_DLL_insert (monitor_head, + monitor_tail, + r); + GNUNET_SERVICE_client_continue (ch->client); } /** - * Task run to check for messages that need to be sent to a client. + * Handler for monitor stop messages * - * @param client a ClientList, containing the client and any messages to be sent to it + * @param cls the client we received this message from + * @param msg the actual message received */ static void -process_pending_messages (struct ClientList *client) +handle_dht_local_monitor_stop (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; + int keys_match; -/** - * Add a PendingMessage to the clients list of messages to be sent - * - * @param client the active client to send the message to - * @param pending_message the actual message to send - */ -static void -add_pending_message (struct ClientList *client, - struct PendingMessage *pending_message) -{ - GNUNET_CONTAINER_DLL_insert_tail (client->pending_head, client->pending_tail, - pending_message); - process_pending_messages (client); + 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. @@ -653,9 +976,19 @@ struct ForwardReplyContext size_t data_size; /** - * Do we need to copy 'pm' because it was already used? + * Number of entries in @e get_path. + */ + unsigned int get_path_length; + + /** + * Number of entries in @e put_path. */ - int do_copy; + unsigned int put_path_length; + + /** + * Type of the data. + */ + enum GNUNET_BLOCK_Type type; }; @@ -668,40 +1001,68 @@ struct ForwardReplyContext * @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 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;iseen_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: @@ -709,8 +1070,8 @@ forward_reply (void *cls, const GNUNET_HashCode * key, void *value) break; case GNUNET_BLOCK_EVALUATION_OK_MORE: GNUNET_array_append (record->seen_replies, - record->seen_replies_count, - ch); + record->seen_replies_count, + ch); do_free = GNUNET_NO; break; case GNUNET_BLOCK_EVALUATION_OK_DUPLICATE: @@ -726,32 +1087,48 @@ forward_reply (void *cls, const GNUNET_HashCode * key, void *value) 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 GNUNET_DHT_ClientResultMessage*) &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; } @@ -763,74 +1140,301 @@ forward_reply (void *cls, const GNUNET_HashCode * key, void *value) * * @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_CLIENTS_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) + 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 GNUNET_DHT_ClientResultMessage *reply; - struct GNUNET_PeerIdentity *paths; size_t msize; - if (NULL == - GNUNET_CONTAINER_multihashmap_get (forward_map, key)) - return; /* no matching request, fast exit! */ - msize = sizeof(struct GNUNET_DHT_ClientResultMessage) + 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 GNUNET_DHT_ClientResultMessage*) &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]; - memcpy (paths, get_path, - sizeof (struct GNUNET_PeerIdentity) * get_path_length); - memcpy (&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 (forward_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 (pm); + 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); +} + + +/** + * Check if some client is monitoring GET RESP messages and notify + * them in that case. + * + * @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_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) +{ + 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); +} + + +/** + * 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_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) +{ + 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_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_free_non_null (cl); } @@ -839,46 +1443,90 @@ GDS_CLIENTS_handle_reply (struct GNUNET_TIME_Absolute expiration, * * @param server the initialized server */ -void -GDS_CLIENTS_init (struct GNUNET_SERVER_Handle *server) +static void +GDS_CLIENTS_init () { - 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_ClientGetStopMessage) }, - {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); + forward_map + = GNUNET_CONTAINER_multihashmap_create (1024, + GNUNET_YES); + retry_heap + = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN); } /** * Shutdown client subsystem. */ -void +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 () { - GNUNET_assert (client_head == NULL); - GNUNET_assert (client_tail == NULL); - if (GNUNET_SCHEDULER_NO_TASK != retry_task) - { - GNUNET_SCHEDULER_cancel (retry_task); - retry_task = GNUNET_SCHEDULER_NO_TASK; - } - 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; + 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 */ -