* @file fs/fs_search.c
* @brief Helper functions for searching.
* @author Christian Grothoff
- *
- * TODO:
- * - add support for pushing "already seen" information
- * to FS service for bloomfilter (can wait)
*/
#include "platform.h"
process_nblock (sc, data, size);
break;
case GNUNET_BLOCK_TYPE_ANY:
+ GNUNET_break (0);
+ break;
case GNUNET_BLOCK_TYPE_FS_DBLOCK:
+ GNUNET_break (0);
+ break;
case GNUNET_BLOCK_TYPE_FS_ONDEMAND:
+ GNUNET_break (0);
+ break;
case GNUNET_BLOCK_TYPE_FS_IBLOCK:
GNUNET_break (0);
break;
}
+/**
+ * Schedule the transmission of the (next) search request
+ * to the service.
+ *
+ * @param sc context for the search
+ */
+static void
+schedule_transmit_search_request (struct GNUNET_FS_SearchContext *sc);
+
+
+/**
+ * Closure for 'build_result_set'.
+ */
+struct MessageBuilderContext
+{
+ /**
+ * How many entries can we store to xoff.
+ */
+ unsigned int put_cnt;
+
+ /**
+ * How many entries should we skip.
+ */
+ unsigned int skip_cnt;
+
+ /**
+ * Where to store the keys.
+ */
+ GNUNET_HashCode *xoff;
+
+ /**
+ * Search context we are iterating for.
+ */
+ struct GNUNET_FS_SearchContext *sc;
+
+ /**
+ * URI the search result must match, NULL for any
+ */
+ struct GNUNET_FS_Uri *uri;
+};
+
+
+/**
+ * Iterating over the known results, pick those
+ * matching the given result range and store
+ * their keys at 'xoff'.
+ *
+ * @param cls the 'struct MessageBuilderContext'
+ * @param key key for a result
+ * @param value the search result
+ * @return GNUNET_OK to continue iterating
+ */
+static int
+build_result_set (void *cls,
+ const GNUNET_HashCode *key,
+ void *value)
+{
+ struct MessageBuilderContext *mbc = cls;
+ struct GNUNET_FS_SearchResult *sr = value;
+
+ if ( (mbc->uri != NULL) &&
+ (GNUNET_YES != GNUNET_FS_uri_test_equal (mbc->uri,
+ sr->uri)) )
+ return GNUNET_OK;
+ if (mbc->skip_cnt > 0)
+ {
+ mbc->skip_cnt--;
+ return GNUNET_OK;
+ }
+ if (mbc->put_cnt == 0)
+ return GNUNET_SYSERR;
+ mbc->sc->search_request_map_offset++;
+ mbc->xoff[--mbc->put_cnt] = *key;
+ return GNUNET_OK;
+}
+
+
+/**
+ * Iterating over the known results, count those
+ * matching the given result range and increment
+ * put count for each.
+ *
+ * @param cls the 'struct MessageBuilderContext'
+ * @param key key for a result
+ * @param value the search result
+ * @return GNUNET_OK to continue iterating
+ */
+static int
+find_result_set (void *cls,
+ const GNUNET_HashCode *key,
+ void *value)
+{
+ struct MessageBuilderContext *mbc = cls;
+ struct GNUNET_FS_SearchResult *sr = value;
+
+ if ( (mbc->uri != NULL) &&
+ (GNUNET_YES != GNUNET_FS_uri_test_equal (mbc->uri,
+ sr->uri)) )
+ return GNUNET_OK;
+ mbc->put_cnt++;
+ return GNUNET_OK;
+}
+
+
/**
* We're ready to transmit the search request to the
* file-sharing service. Do it.
void *buf)
{
struct GNUNET_FS_SearchContext *sc = cls;
+ struct MessageBuilderContext mbc;
size_t msize;
struct SearchMessage *sm;
- unsigned int i;
const char *identifier;
GNUNET_HashCode key;
GNUNET_HashCode idh;
+ unsigned int sqms;
if (NULL == buf)
{
try_reconnect (sc);
return 0;
}
+ mbc.sc = sc;
+ mbc.skip_cnt = sc->search_request_map_offset;
+ sm = buf;
+ sm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_START_SEARCH);
+ mbc.xoff = (GNUNET_HashCode* ) &sm[1];
if (GNUNET_FS_uri_test_ksk (sc->uri))
{
- msize = sizeof (struct SearchMessage) * sc->uri->data.ksk.keywordCount;
+ msize = sizeof (struct SearchMessage);
GNUNET_assert (size >= msize);
- sm = buf;
- memset (sm, 0, msize);
- for (i=0;i<sc->uri->data.ksk.keywordCount;i++)
+ mbc.uri = NULL;
+ mbc.put_cnt = 0;
+ GNUNET_CONTAINER_multihashmap_iterate (sc->master_result_map,
+ &find_result_set,
+ &mbc);
+ sqms = mbc.put_cnt;
+ mbc.put_cnt = (size - msize) / sizeof (GNUNET_HashCode);
+ mbc.put_cnt = GNUNET_MIN (mbc.put_cnt,
+ sqms - mbc.skip_cnt);
+ if (sc->search_request_map_offset < sqms)
+ GNUNET_assert (mbc.put_cnt > 0);
+
+ sm->header.size = htons (msize);
+ if (0 != (sc->options & GNUNET_FS_SEARCH_OPTION_LOOPBACK_ONLY))
+ sm->options = htonl (1);
+ else
+ sm->options = htonl (0);
+ sm->type = htonl (GNUNET_BLOCK_TYPE_ANY);
+ sm->anonymity_level = htonl (sc->anonymity);
+ sm->query = sc->requests[sc->keyword_offset].query;
+ msize += sizeof (GNUNET_HashCode) * mbc.put_cnt;
+ GNUNET_CONTAINER_multihashmap_iterate (sc->master_result_map,
+ &build_result_set,
+ &mbc);
+ sm->header.size = htons (msize);
+ if (sqms != sc->search_request_map_offset)
{
- sm[i].header.size = htons (sizeof (struct SearchMessage));
- sm[i].header.type = htons (GNUNET_MESSAGE_TYPE_FS_START_SEARCH);
- if (0 != (sc->options & GNUNET_FS_SEARCH_OPTION_LOOPBACK_ONLY))
- sm[i].options = htonl (1);
- else
- sm[i].options = htonl (0);
- sm[i].type = htonl (GNUNET_BLOCK_TYPE_ANY);
- sm[i].anonymity_level = htonl (sc->anonymity);
- sm[i].query = sc->requests[i].query;
- /* FIXME: should transmit hash codes of all already-known results here!
- (and if they do not fit, add another message with the same
- header and additional already-seen results!) */
+ /* more requesting to be done... */
+ schedule_transmit_search_request (sc);
+ return msize;
+ }
+ sc->keyword_offset++;
+ if (sc->uri->data.ksk.keywordCount !=
+ sc->keyword_offset)
+ {
+ /* more requesting to be done... */
+ schedule_transmit_search_request (sc);
+ return msize;
}
}
else
GNUNET_assert (GNUNET_FS_uri_test_sks (sc->uri));
msize = sizeof (struct SearchMessage);
GNUNET_assert (size >= msize);
- sm = buf;
- memset (sm, 0, msize);
- sm->header.size = htons (sizeof (struct SearchMessage));
- sm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_START_SEARCH);
if (0 != (sc->options & GNUNET_FS_SEARCH_OPTION_LOOPBACK_ONLY))
sm->options = htonl (1);
else
GNUNET_CRYPTO_hash_xor (&idh,
&sm->target,
&sm->query);
- /* FIXME: should transmit hash codes of all already-known results here!
- (and if they do not fit, add another message with the same
- header and additional already-seen results!) */
- }
+ mbc.put_cnt = (size - msize) / sizeof (GNUNET_HashCode);
+ sqms = GNUNET_CONTAINER_multihashmap_size (sc->master_result_map);
+ mbc.put_cnt = GNUNET_MIN (mbc.put_cnt,
+ sqms - mbc.skip_cnt);
+ mbc.uri = NULL;
+ if (sc->search_request_map_offset < sqms)
+ GNUNET_assert (mbc.put_cnt > 0);
+ msize += sizeof (GNUNET_HashCode) * mbc.put_cnt;
+ GNUNET_CONTAINER_multihashmap_iterate (sc->master_result_map,
+ &build_result_set,
+ &mbc);
+ sm->header.size = htons (msize);
+ if (sqms != sc->search_request_map_offset)
+ {
+ /* more requesting to be done... */
+ schedule_transmit_search_request (sc);
+ return msize;
+ }
+ }
GNUNET_CLIENT_receive (sc->client,
&receive_results,
sc,
}
+/**
+ * Schedule the transmission of the (next) search request
+ * to the service.
+ *
+ * @param sc context for the search
+ */
+static void
+schedule_transmit_search_request (struct GNUNET_FS_SearchContext *sc)
+{
+ size_t size;
+ unsigned int sqms;
+ unsigned int fit;
+
+ size = sizeof (struct SearchMessage);
+ sqms = GNUNET_CONTAINER_multihashmap_size (sc->master_result_map) - sc->search_request_map_offset;
+ fit = (GNUNET_SERVER_MAX_MESSAGE_SIZE - 1 - size) / sizeof (GNUNET_HashCode);
+ fit = GNUNET_MIN (fit, sqms);
+ size += sizeof (GNUNET_HashCode) * fit;
+ GNUNET_CLIENT_notify_transmit_ready (sc->client,
+ size,
+ GNUNET_CONSTANTS_SERVICE_TIMEOUT,
+ GNUNET_NO,
+ &transmit_search_request,
+ sc);
+
+}
+
+
/**
* Reconnect to the FS service and transmit
* our queries NOW.
{
struct GNUNET_FS_SearchContext *sc = cls;
struct GNUNET_CLIENT_Connection *client;
- size_t size;
-
+
sc->task = GNUNET_SCHEDULER_NO_TASK;
client = GNUNET_CLIENT_connect ("fs",
sc->h->cfg);
return;
}
sc->client = client;
- if (GNUNET_FS_uri_test_ksk (sc->uri))
- size = sizeof (struct SearchMessage) * sc->uri->data.ksk.keywordCount;
- else
- size = sizeof (struct SearchMessage);
- GNUNET_CLIENT_notify_transmit_ready (client,
- size,
- GNUNET_CONSTANTS_SERVICE_TIMEOUT,
- GNUNET_NO,
- &transmit_search_request,
- sc);
+ sc->search_request_map_offset = 0;
+ sc->keyword_offset = 0;
+ schedule_transmit_search_request (sc);
}
GNUNET_HashCode hc;
struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pub;
struct GNUNET_CRYPTO_RsaPrivateKey *pk;
- size_t size;
GNUNET_assert (NULL == sc->client);
- if (GNUNET_FS_uri_test_ksk (sc->uri))
- {
- size = sizeof (struct SearchMessage) * sc->uri->data.ksk.keywordCount;
- }
- else
- {
- GNUNET_assert (GNUNET_FS_uri_test_sks (sc->uri));
- size = sizeof (struct SearchMessage);
- }
- if (size >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Too many keywords specified for a single search."));
- return GNUNET_SYSERR;
- }
if (GNUNET_FS_uri_test_ksk (sc->uri))
{
GNUNET_assert (0 != sc->uri->data.ksk.keywordCount);
for (i=0;i<sc->uri->data.ksk.keywordCount;i++)
{
keyword = &sc->uri->data.ksk.keywords[i][1];
- GNUNET_CRYPTO_hash (keyword, strlen (keyword), &hc);
+ GNUNET_CRYPTO_hash (keyword,
+ strlen (keyword),
+ &hc);
pk = GNUNET_CRYPTO_rsa_key_create_from_hash (&hc);
GNUNET_assert (pk != NULL);
GNUNET_CRYPTO_rsa_key_get_public (pk, &pub);
sc->h->cfg);
if (NULL == sc->client)
return GNUNET_SYSERR;
- GNUNET_CLIENT_notify_transmit_ready (sc->client,
- size,
- GNUNET_CONSTANTS_SERVICE_TIMEOUT,
- GNUNET_NO,
- &transmit_search_request,
- sc);
+ schedule_transmit_search_request (sc);
return GNUNET_OK;
}
projects / oweals / gnunet.git / blobdiff