/*
This file is part of GNUnet.
- (C) 2001, 2002, 2003, 2004, 2005, 2006, 2008 Christian Grothoff (and other contributing authors)
+ (C) 2001-2006, 2008-2012 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
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,
+ Free Software Foundation, Inc., 59 Tem ple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
-
/**
- * @file applications/fs/ecrs/search.c
+ * @file fs/fs_search.c
* @brief Helper functions for searching.
* @author Christian Grothoff
*/
#include "platform.h"
+#include "gnunet_constants.h"
+#include "gnunet_fs_service.h"
#include "gnunet_protocols.h"
-#include "gnunet_fs_lib.h"
-#include "gnunet_ecrs_lib.h"
-#include "ecrs_core.h"
-#include "ecrs.h"
+#include "fs_api.h"
+
-#define DEBUG_SEARCH GNUNET_NO
+/**
+ * Number of availability trials we perform per search result.
+ */
+#define AVAILABILITY_TRIALS_MAX 8
/**
- * Context for an individual search. Followed
- * by keyCount keys of type GNUNET_HashCode.
+ * Fill in all of the generic fields for a search event and
+ * call the callback.
+ *
+ * @param pi structure to fill in
+ * @param sc overall search context
+ * @return value returned by the callback
*/
-struct PendingSearch
+void *
+GNUNET_FS_search_make_status_ (struct GNUNET_FS_ProgressInfo *pi,
+ struct GNUNET_FS_SearchContext *sc)
{
- struct PendingSearch *next;
+ void *ret;
- struct GNUNET_ECRS_SearchContext *context;
+ pi->value.search.sc = sc;
+ pi->value.search.cctx = sc->client_info;
+ pi->value.search.pctx =
+ (NULL == sc->psearch_result) ? NULL : sc->psearch_result->client_info;
+ pi->value.search.query = sc->uri;
+ pi->value.search.duration =
+ GNUNET_TIME_absolute_get_duration (sc->start_time);
+ pi->value.search.anonymity = sc->anonymity;
+ ret = sc->h->upcb (sc->h->upcb_cls, pi);
+ return ret;
+}
- /**
- * The key (for decryption)
- */
- GNUNET_HashCode decryptKey;
- unsigned int keyCount;
+/**
+ * Check if the given result is identical
+ * to the given URI.
+ *
+ * @param cls points to the URI we check against
+ * @param key not used
+ * @param value a "struct GNUNET_FS_SearchResult" who's URI we
+ * should compare with
+ * @return GNUNET_SYSERR if the result is present,
+ * GNUNET_OK otherwise
+ */
+static int
+test_result_present (void *cls, const struct GNUNET_HashCode * key, void *value)
+{
+ const struct GNUNET_FS_Uri *uri = cls;
+ struct GNUNET_FS_SearchResult *sr = value;
- /**
- * What type of query is it?
- */
- unsigned int type;
+ if (GNUNET_FS_uri_test_equal (uri, sr->uri))
+ return GNUNET_SYSERR;
+ return GNUNET_OK;
+}
-};
/**
- * Context for search operation.
+ * We've found a new CHK result. Let the client
+ * know about it.
+ *
+ * @param sc the search context
+ * @param sr the specific result
*/
-struct GNUNET_ECRS_SearchContext
+static void
+notify_client_chk_result (struct GNUNET_FS_SearchContext *sc,
+ struct GNUNET_FS_SearchResult *sr)
{
- /**
- * Time when the cron-job was first started.
- */
- GNUNET_CronTime start;
+ struct GNUNET_FS_ProgressInfo pi;
- /**
- * What is the global timeout?
- */
- GNUNET_CronTime timeout;
+ pi.status = GNUNET_FS_STATUS_SEARCH_RESULT;
+ pi.value.search.specifics.result.meta = sr->meta;
+ pi.value.search.specifics.result.uri = sr->uri;
+ pi.value.search.specifics.result.result = sr;
+ pi.value.search.specifics.result.applicability_rank = sr->optional_support;
+ sr->client_info = GNUNET_FS_search_make_status_ (&pi, sc);
+}
+
+
+/**
+ * We've found new information about an existing CHK result. Let the
+ * client know about it.
+ *
+ * @param sc the search context
+ * @param sr the specific result
+ */
+static void
+notify_client_chk_update (struct GNUNET_FS_SearchContext *sc,
+ struct GNUNET_FS_SearchResult *sr)
+{
+ struct GNUNET_FS_ProgressInfo pi;
+
+ pi.status = GNUNET_FS_STATUS_SEARCH_UPDATE;
+ pi.value.search.specifics.update.cctx = sr->client_info;
+ pi.value.search.specifics.update.meta = sr->meta;
+ pi.value.search.specifics.update.uri = sr->uri;
+ pi.value.search.specifics.update.availability_rank =
+ 2 * sr->availability_success - sr->availability_trials;
+ pi.value.search.specifics.update.availability_certainty =
+ sr->availability_trials;
+ pi.value.search.specifics.update.applicability_rank = sr->optional_support;
+ sr->client_info = GNUNET_FS_search_make_status_ (&pi, sc);
+}
+
+/**
+ * Context for "get_result_present".
+ */
+struct GetResultContext
+{
/**
- * Search context
+ * The URI we're looking for.
*/
- struct GNUNET_FS_SearchContext *sctx;
+ const struct GNUNET_FS_Uri *uri;
/**
- * Active searches.
+ * Where to store a pointer to the search
+ * result struct if we found a match.
*/
- struct PendingSearch *queries;
+ struct GNUNET_FS_SearchResult *sr;
+};
- GNUNET_ECRS_SearchResultProcessor spcb;
- void *spcbClosure;
+/**
+ * Check if the given result is identical to the given URI and if so
+ * return it.
+ *
+ * @param cls a "struct GetResultContext"
+ * @param key not used
+ * @param value a "struct GNUNET_FS_SearchResult" who's URI we
+ * should compare with
+ * @return GNUNET_OK
+ */
+static int
+get_result_present (void *cls, const struct GNUNET_HashCode * key, void *value)
+{
+ struct GetResultContext *grc = cls;
+ struct GNUNET_FS_SearchResult *sr = value;
- struct GNUNET_GE_Context *ectx;
+ if (GNUNET_FS_uri_test_equal (grc->uri, sr->uri))
+ grc->sr = sr;
+ return GNUNET_OK;
+}
- struct GNUNET_GC_Configuration *cfg;
- int aborted;
+/**
+ * Signal result of last probe to client and then schedule next
+ * probe.
+ */
+static void
+signal_probe_result (struct GNUNET_FS_SearchResult *sr)
+{
+ struct GNUNET_FS_ProgressInfo pi;
- int my_sctx;
+ pi.status = GNUNET_FS_STATUS_SEARCH_UPDATE;
+ pi.value.search.specifics.update.cctx = sr->client_info;
+ pi.value.search.specifics.update.meta = sr->meta;
+ pi.value.search.specifics.update.uri = sr->uri;
+ pi.value.search.specifics.update.availability_rank = sr->availability_success;
+ pi.value.search.specifics.update.availability_certainty =
+ sr->availability_trials;
+ pi.value.search.specifics.update.applicability_rank = sr->optional_support;
+ sr->client_info = GNUNET_FS_search_make_status_ (&pi, sr->sc);
+ GNUNET_FS_search_start_probe_ (sr);
+}
- unsigned int anonymityLevel;
-};
+/**
+ * Handle the case where we have failed to receive a response for our probe.
+ *
+ * @param cls our 'struct GNUNET_FS_SearchResult*'
+ * @param tc scheduler context
+ */
+static void
+probe_failure_handler (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_FS_SearchResult *sr = cls;
+
+ sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ sr->availability_trials++;
+ GNUNET_FS_download_stop (sr->probe_ctx, GNUNET_YES);
+ sr->probe_ctx = NULL;
+ GNUNET_FS_search_result_sync_ (sr);
+ signal_probe_result (sr);
+}
-static int
-receive_response_callback (const GNUNET_HashCode * key,
- const GNUNET_DatastoreValue * value,
- void *cls, unsigned long long uid);
/**
- * Add a query to the SQC.
+ * Handle the case where we have gotten a response for our probe.
+ *
+ * @param cls our 'struct GNUNET_FS_SearchResult*'
+ * @param tc scheduler context
*/
static void
-add_search (unsigned int type,
- unsigned int keyCount,
- const GNUNET_HashCode * keys,
- const GNUNET_HashCode * dkey,
- struct GNUNET_ECRS_SearchContext *sqc)
-{
- struct PendingSearch *ps;
-
- ps =
- GNUNET_malloc (sizeof (struct PendingSearch) +
- sizeof (GNUNET_HashCode) * keyCount);
- ps->type = type;
- ps->keyCount = keyCount;
- memcpy (&ps[1], keys, sizeof (GNUNET_HashCode) * keyCount);
- ps->decryptKey = *dkey;
- ps->context = sqc;
- ps->next = sqc->queries;
- sqc->queries = ps;
- GNUNET_FS_start_search (sqc->sctx,
- NULL,
- type,
- keyCount,
- keys,
- sqc->anonymityLevel,
- &receive_response_callback, ps);
-}
-
-/**
- * Add the query that corresponds to the given URI
- * to the SQC.
+probe_success_handler (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_FS_SearchResult *sr = cls;
+
+ sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ sr->availability_trials++;
+ sr->availability_success++;
+ GNUNET_FS_download_stop (sr->probe_ctx, GNUNET_YES);
+ sr->probe_ctx = NULL;
+ GNUNET_FS_search_result_sync_ (sr);
+ signal_probe_result (sr);
+}
+
+
+/**
+ * Notification of FS that a search probe has made progress.
+ * This function is used INSTEAD of the client's event handler
+ * for downloads where the GNUNET_FS_DOWNLOAD_IS_PROBE flag is set.
+ *
+ * @param cls closure, always NULL (!), actual closure
+ * is in the client-context of the info struct
+ * @param info details about the event, specifying the event type
+ * and various bits about the event
+ * @return client-context (for the next progress call
+ * for this operation; should be set to NULL for
+ * SUSPEND and STOPPED events). The value returned
+ * will be passed to future callbacks in the respective
+ * field in the GNUNET_FS_ProgressInfo struct.
*/
-static void
-add_search_for_uri (const struct GNUNET_ECRS_URI *uri,
- struct GNUNET_ECRS_SearchContext *sqc)
+void *
+GNUNET_FS_search_probe_progress_ (void *cls,
+ const struct GNUNET_FS_ProgressInfo *info)
{
- struct GNUNET_GE_Context *ectx = sqc->ectx;
+ struct GNUNET_FS_SearchResult *sr = info->value.download.cctx;
+ struct GNUNET_TIME_Relative dur;
- switch (uri->type)
+ switch (info->status)
+ {
+ case GNUNET_FS_STATUS_DOWNLOAD_START:
+ /* ignore */
+ break;
+ case GNUNET_FS_STATUS_DOWNLOAD_RESUME:
+ /* probes should never be resumed */
+ GNUNET_assert (0);
+ break;
+ case GNUNET_FS_STATUS_DOWNLOAD_SUSPEND:
+ /* probes should never be suspended */
+ GNUNET_break (0);
+ break;
+ case GNUNET_FS_STATUS_DOWNLOAD_PROGRESS:
+ /* ignore */
+ break;
+ case GNUNET_FS_STATUS_DOWNLOAD_ERROR:
+ if (GNUNET_SCHEDULER_NO_TASK != sr->probe_cancel_task)
{
- case chk:
- GNUNET_GE_LOG (ectx,
- GNUNET_GE_ERROR | GNUNET_GE_BULK | GNUNET_GE_USER,
- _("CHK URI not allowed for search.\n"));
- break;
- case sks:
- {
- GNUNET_HashCode keys[2];
- GNUNET_HashCode hk; /* hk = GNUNET_hash(identifier) */
- GNUNET_HashCode hk2; /* hk2 = GNUNET_hash(hk) */
-
- GNUNET_hash (uri->data.sks.identifier,
- strlen (uri->data.sks.identifier), &hk);
- GNUNET_hash (&hk, sizeof (GNUNET_HashCode), &hk2);
- /* compute routing key keys[0] = H(key) ^ namespace */
- GNUNET_hash_xor (&hk2, &uri->data.sks.namespace, &keys[0]);
- keys[1] = uri->data.sks.namespace;
- add_search (GNUNET_ECRS_BLOCKTYPE_SIGNED, 2, &keys[0], &hk, sqc);
- break;
- }
- case ksk:
- {
- GNUNET_HashCode hc;
- GNUNET_HashCode query;
- struct GNUNET_RSA_PrivateKey *pk;
- GNUNET_RSA_PublicKey pub;
- int i;
- const char *keyword;
-
-#if DEBUG_SEARCH
- GNUNET_GE_LOG (ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "Computing queries (this may take a while).\n");
-#endif
- for (i = 0; i < uri->data.ksk.keywordCount; i++)
- {
- keyword = uri->data.ksk.keywords[i];
- /* first character of the keyword is
- "+" or " " to indicate mandatory or
- not -- ignore for hashing! */
- GNUNET_hash (&keyword[1], strlen (&keyword[1]), &hc);
- pk = GNUNET_RSA_create_key_from_hash (&hc);
- GNUNET_RSA_get_public_key (pk, &pub);
- GNUNET_hash (&pub, sizeof (GNUNET_RSA_PublicKey), &query);
- add_search (GNUNET_ECRS_BLOCKTYPE_ANY, /* GNUNET_ECRS_BLOCKTYPE_KEYWORD, GNUNET_ECRS_BLOCKTYPE_NAMESPACE or GNUNET_ECRS_BLOCKTYPE_KEYWORD_FOR_NAMESPACE ok */
- 1, &query, &hc, sqc);
- GNUNET_RSA_free_key (pk);
- }
-#if DEBUG_SEARCH
- GNUNET_GE_LOG (ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "Queries ready.\n");
-#endif
- break;
- }
- case loc:
- GNUNET_GE_LOG (ectx,
- GNUNET_GE_ERROR | GNUNET_GE_BULK | GNUNET_GE_USER,
- _("LOC URI not allowed for search.\n"));
- break;
- default:
- GNUNET_GE_BREAK (ectx, 0);
- /* unknown URI type */
- break;
+ GNUNET_SCHEDULER_cancel (sr->probe_cancel_task);
+ sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ sr->probe_cancel_task =
+ GNUNET_SCHEDULER_add_delayed (sr->remaining_probe_time,
+ &probe_failure_handler, sr);
+ break;
+ case GNUNET_FS_STATUS_DOWNLOAD_COMPLETED:
+ if (GNUNET_SCHEDULER_NO_TASK != sr->probe_cancel_task)
+ {
+ GNUNET_SCHEDULER_cancel (sr->probe_cancel_task);
+ sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
}
+ sr->probe_cancel_task =
+ GNUNET_SCHEDULER_add_now (&probe_success_handler, sr);
+ break;
+ case GNUNET_FS_STATUS_DOWNLOAD_STOPPED:
+ if (GNUNET_SCHEDULER_NO_TASK != sr->probe_cancel_task)
+ {
+ GNUNET_SCHEDULER_cancel (sr->probe_cancel_task);
+ sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ sr = NULL;
+ break;
+ case GNUNET_FS_STATUS_DOWNLOAD_ACTIVE:
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == sr->probe_cancel_task);
+ sr->probe_active_time = GNUNET_TIME_absolute_get ();
+ sr->probe_cancel_task =
+ GNUNET_SCHEDULER_add_delayed (sr->remaining_probe_time,
+ &probe_failure_handler, sr);
+ break;
+ case GNUNET_FS_STATUS_DOWNLOAD_INACTIVE:
+ if (GNUNET_SCHEDULER_NO_TASK != sr->probe_cancel_task)
+ {
+ GNUNET_SCHEDULER_cancel (sr->probe_cancel_task);
+ sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ dur = GNUNET_TIME_absolute_get_duration (sr->probe_active_time);
+ sr->remaining_probe_time =
+ GNUNET_TIME_relative_subtract (sr->remaining_probe_time, dur);
+ GNUNET_FS_search_result_sync_ (sr);
+ break;
+ default:
+ GNUNET_break (0);
+ return NULL;
+ }
+ return sr;
+}
+
+
+/**
+ * Start download probes for the given search result.
+ *
+ * @param sr the search result
+ */
+void
+GNUNET_FS_search_start_probe_ (struct GNUNET_FS_SearchResult *sr)
+{
+ uint64_t off;
+ uint64_t len;
+
+ if (NULL != sr->probe_ctx)
+ return;
+ if (NULL != sr->download)
+ return;
+ if (0 == (sr->sc->h->flags & GNUNET_FS_FLAGS_DO_PROBES))
+ return;
+ if (sr->availability_trials > AVAILABILITY_TRIALS_MAX)
+ return;
+ if ( (chk != sr->uri->type) && (loc != sr->uri->type))
+ return;
+ len = GNUNET_FS_uri_chk_get_file_size (sr->uri);
+ if (0 == len)
+ return;
+ if ((len <= DBLOCK_SIZE) && (sr->availability_success > 0))
+ return;
+ off = len / DBLOCK_SIZE;
+ if (off > 0)
+ off = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, off);
+ off *= DBLOCK_SIZE;
+ if (len - off < DBLOCK_SIZE)
+ len = len - off;
+ else
+ len = DBLOCK_SIZE;
+ sr->remaining_probe_time =
+ GNUNET_TIME_relative_multiply (sr->sc->h->avg_block_latency,
+ 2 * (1 + sr->availability_trials));
+ sr->probe_ctx =
+ GNUNET_FS_download_start (sr->sc->h, sr->uri, sr->meta, NULL, NULL, off,
+ len, sr->sc->anonymity,
+ GNUNET_FS_DOWNLOAD_NO_TEMPORARIES |
+ GNUNET_FS_DOWNLOAD_IS_PROBE, sr, NULL);
+}
+
+
+/**
+ * We have received a KSK result. Check how it fits in with the
+ * overall query and notify the client accordingly.
+ *
+ * @param sc context for the overall query
+ * @param ent entry for the specific keyword
+ * @param uri the URI that was found
+ * @param meta metadata associated with the URI
+ * under the "ent" keyword
+ */
+static void
+process_ksk_result (struct GNUNET_FS_SearchContext *sc,
+ struct SearchRequestEntry *ent,
+ const struct GNUNET_FS_Uri *uri,
+ const struct GNUNET_CONTAINER_MetaData *meta)
+{
+ struct GNUNET_HashCode key;
+ struct GNUNET_FS_SearchResult *sr;
+ struct GetResultContext grc;
+ int is_new;
+ unsigned int koff;
+
+ /* check if new */
+ GNUNET_assert (NULL != sc);
+ GNUNET_FS_uri_to_key (uri, &key);
+ if (GNUNET_SYSERR ==
+ GNUNET_CONTAINER_multihashmap_get_multiple (ent->results, &key,
+ &test_result_present,
+ (void *) uri))
+ return; /* duplicate result */
+ /* try to find search result in master map */
+ grc.sr = NULL;
+ grc.uri = uri;
+ GNUNET_CONTAINER_multihashmap_get_multiple (sc->master_result_map, &key,
+ &get_result_present, &grc);
+ sr = grc.sr;
+ is_new = (NULL == sr) || (sr->mandatory_missing > 0);
+ if (NULL == sr)
+ {
+ sr = GNUNET_malloc (sizeof (struct GNUNET_FS_SearchResult));
+ sr->sc = sc;
+ sr->uri = GNUNET_FS_uri_dup (uri);
+ sr->meta = GNUNET_CONTAINER_meta_data_duplicate (meta);
+ sr->mandatory_missing = sc->mandatory_count;
+ sr->key = key;
+ sr->keyword_bitmap = GNUNET_malloc ((sc->uri->data.ksk.keywordCount + 7) / 8); /* round up, count bits */
+ GNUNET_CONTAINER_multihashmap_put (sc->master_result_map, &key, sr,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ }
+ else
+ {
+ GNUNET_CONTAINER_meta_data_merge (sr->meta, meta);
+ }
+ koff = ent - sc->requests;
+ GNUNET_assert ( (ent >= sc->requests) && (koff < sc->uri->data.ksk.keywordCount));
+ sr->keyword_bitmap[koff / 8] |= (1 << (koff % 8));
+ /* check if mandatory satisfied */
+ if (ent->mandatory)
+ sr->mandatory_missing--;
+ else
+ sr->optional_support++;
+ if (0 != sr->mandatory_missing)
+ return;
+ if (is_new)
+ notify_client_chk_result (sc, sr);
+ else
+ notify_client_chk_update (sc, sr);
+ GNUNET_FS_search_result_sync_ (sr);
+ GNUNET_FS_search_start_probe_ (sr);
+}
+
+
+/**
+ * Start search for content, internal API.
+ *
+ * @param h handle to the file sharing subsystem
+ * @param uri specifies the search parameters; can be
+ * a KSK URI or an SKS URI.
+ * @param anonymity desired level of anonymity
+ * @param options options for the search
+ * @param cctx client context
+ * @param psearch parent search result (for namespace update searches)
+ * @return context that can be used to control the search
+ */
+static struct GNUNET_FS_SearchContext *
+search_start (struct GNUNET_FS_Handle *h, const struct GNUNET_FS_Uri *uri,
+ uint32_t anonymity, enum GNUNET_FS_SearchOptions options,
+ void *cctx, struct GNUNET_FS_SearchResult *psearch);
+
+
+/**
+ * We have received an SKS result. Start searching for updates and
+ * notify the client if it is a new result.
+ *
+ * @param sc context for the overall query
+ * @param id_update identifier for updates, NULL for none
+ * @param uri the URI that was found
+ * @param meta metadata associated with the URI
+ */
+static void
+process_sks_result (struct GNUNET_FS_SearchContext *sc, const char *id_update,
+ const struct GNUNET_FS_Uri *uri,
+ const struct GNUNET_CONTAINER_MetaData *meta)
+{
+ struct GNUNET_FS_Uri uu;
+ struct GNUNET_HashCode key;
+ struct GNUNET_FS_SearchResult *sr;
+
+ /* check if new */
+ GNUNET_assert (NULL != sc);
+ GNUNET_FS_uri_to_key (uri, &key);
+ GNUNET_CRYPTO_hash_xor (&uri->data.chk.chk.key, &uri->data.chk.chk.query,
+ &key);
+ if (GNUNET_SYSERR ==
+ GNUNET_CONTAINER_multihashmap_get_multiple (sc->master_result_map, &key,
+ &test_result_present,
+ (void *) uri))
+ return; /* duplicate result */
+ sr = GNUNET_malloc (sizeof (struct GNUNET_FS_SearchResult));
+ sr->sc = sc;
+ sr->uri = GNUNET_FS_uri_dup (uri);
+ sr->meta = GNUNET_CONTAINER_meta_data_duplicate (meta);
+ sr->key = key;
+ GNUNET_CONTAINER_multihashmap_put (sc->master_result_map, &key, sr,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ GNUNET_FS_search_result_sync_ (sr);
+ GNUNET_FS_search_start_probe_ (sr);
+ /* notify client */
+ notify_client_chk_result (sc, sr);
+ /* search for updates */
+ if (0 == strlen (id_update))
+ return; /* no updates */
+ uu.type = sks;
+ uu.data.sks.ns = sc->uri->data.sks.ns;
+ uu.data.sks.identifier = GNUNET_strdup (id_update);
+ (void) search_start (sc->h, &uu, sc->anonymity, sc->options, NULL, sr);
+ GNUNET_free (uu.data.sks.identifier);
}
+
/**
- * We found an GNUNET_EC_SBlock. Decode the meta-data and call
- * the callback of the SQC with the root-URI for the namespace,
- * together with the namespace advertisement. Also, if this is
- * a result with updates, automatically start the search for
- * updates.
+ * Decrypt a block using a 'keyword' as the passphrase. Given the
+ * KSK public key derived from the keyword, this function looks up
+ * the original keyword in the search context and decrypts the
+ * given ciphertext block.
+ *
+ * @param sc search context with the keywords
+ * @param public_key public key to use to lookup the keyword
+ * @param edata encrypted data
+ * @param edata_size number of bytes in 'edata' (and 'data')
+ * @param data where to store the plaintext
+ * @return keyword index on success, GNUNET_SYSERR on error (no such
+ * keyword, internal error)
*/
static int
-process_sblock_result (const GNUNET_EC_SBlock * sb,
- const GNUNET_HashCode * key,
- unsigned int size,
- struct GNUNET_ECRS_SearchContext *sqc)
-{
- static GNUNET_HashCode allZeros;
- struct GNUNET_GE_Context *ectx = sqc->ectx;
- GNUNET_ECRS_FileInfo fi;
- URI updateURI;
- int ret;
+decrypt_block_with_keyword (const struct GNUNET_FS_SearchContext *sc,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *public_key,
+ const void *edata,
+ size_t edata_size,
+ char *data)
+{
+ struct GNUNET_HashCode q;
+ struct GNUNET_CRYPTO_AesSessionKey skey;
+ struct GNUNET_CRYPTO_AesInitializationVector iv;
+ int i;
+
+ GNUNET_CRYPTO_hash (public_key,
+ sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
+ &q);
+ /* find key */
+ for (i = 0; i < sc->uri->data.ksk.keywordCount; i++)
+ if (0 == memcmp (&q, &sc->requests[i].query, sizeof (struct GNUNET_HashCode)))
+ break;
+ if (i == sc->uri->data.ksk.keywordCount)
+ {
+ /* oops, does not match any of our keywords!? */
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ /* decrypt */
+ GNUNET_CRYPTO_hash_to_aes_key (&sc->requests[i].key, &skey, &iv);
+ if (-1 ==
+ GNUNET_CRYPTO_aes_decrypt (edata, edata_size, &skey,
+ &iv, data))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ return i;
+}
+
+
+/**
+ * Process a keyword-search result.
+ *
+ * @param sc our search context
+ * @param kb the kblock
+ * @param size size of kb
+ */
+static void
+process_kblock (struct GNUNET_FS_SearchContext *sc, const struct KBlock *kb,
+ size_t size)
+{
+ size_t j;
+ char pt[size - sizeof (struct KBlock)];
+ const char *eos;
+ struct GNUNET_CONTAINER_MetaData *meta;
+ struct GNUNET_FS_Uri *uri;
+ char *emsg;
+ int i;
+
+ if (-1 == (i = decrypt_block_with_keyword (sc,
+ &kb->keyspace,
+ &kb[1],
+ size - sizeof (struct KBlock),
+ pt)))
+ return;
+ /* parse */
+ eos = memchr (pt, 0, sizeof (pt));
+ if (NULL == eos)
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ j = eos - pt + 1;
+ if (sizeof (pt) == j)
+ meta = GNUNET_CONTAINER_meta_data_create ();
+ else
+ meta = GNUNET_CONTAINER_meta_data_deserialize (&pt[j], sizeof (pt) - j);
+ if (NULL == meta)
+ {
+ GNUNET_break_op (0); /* kblock malformed */
+ return;
+ }
+ uri = GNUNET_FS_uri_parse (pt, &emsg);
+ if (NULL == uri)
+ {
+ GNUNET_break_op (0); /* kblock malformed */
+ GNUNET_free_non_null (emsg);
+ GNUNET_CONTAINER_meta_data_destroy (meta);
+ return;
+ }
+ /* process */
+ process_ksk_result (sc, &sc->requests[i], uri, meta);
+
+ /* clean up */
+ GNUNET_CONTAINER_meta_data_destroy (meta);
+ GNUNET_FS_uri_destroy (uri);
+}
+
+
+/**
+ * Process a keyword-search result with a namespace advertisment.
+ *
+ * @param sc our search context
+ * @param nb the nblock
+ * @param size size of nb
+ */
+static void
+process_nblock (struct GNUNET_FS_SearchContext *sc, const struct NBlock *nb,
+ size_t size)
+{
+ size_t j;
+ char pt[size - sizeof (struct NBlock)];
+ const char *eos;
+ struct GNUNET_CONTAINER_MetaData *meta;
+ struct GNUNET_FS_Uri *uri;
+ char *uris;
+ int i;
+
+ if (-1 == (i = decrypt_block_with_keyword (sc,
+ &nb->keyspace,
+ &nb[1],
+ size - sizeof (struct NBlock),
+ pt)))
+ return;
+ /* parse */
+ eos = memchr (pt, 0, sizeof (pt));
+ if (NULL == eos)
+ {
+ GNUNET_break_op (0);
+ return;
+ }
+ j = eos - pt + 1;
+ if (sizeof (pt) == j)
+ meta = GNUNET_CONTAINER_meta_data_create ();
+ else
+ meta = GNUNET_CONTAINER_meta_data_deserialize (&pt[j], sizeof (pt) - j);
+ if (NULL == meta)
+ {
+ GNUNET_break_op (0); /* nblock malformed */
+ return;
+ }
+
+ uri = GNUNET_malloc (sizeof (struct GNUNET_FS_Uri));
+ uri->type = sks;
+ uri->data.sks.identifier = GNUNET_strdup (pt);
+ GNUNET_CRYPTO_hash (&nb->subspace,
+ sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
+ &uri->data.sks.ns);
+ uris = GNUNET_FS_uri_to_string (uri);
+ GNUNET_CONTAINER_meta_data_insert (meta, "<gnunet>", EXTRACTOR_METATYPE_URI,
+ EXTRACTOR_METAFORMAT_UTF8, "text/plain",
+ uris, strlen (uris) + 1);
+ GNUNET_free (uris);
+ GNUNET_PSEUDONYM_add (sc->h->cfg, &uri->data.sks.ns, meta);
+ /* process */
+ process_ksk_result (sc, &sc->requests[i], uri, meta);
+
+ /* clean up */
+ GNUNET_CONTAINER_meta_data_destroy (meta);
+ GNUNET_FS_uri_destroy (uri);
+}
+
+
+/**
+ * Process a namespace-search result.
+ *
+ * @param sc our search context
+ * @param sb the sblock
+ * @param size size of sb
+ */
+static void
+process_sblock (struct GNUNET_FS_SearchContext *sc, const struct SBlock *sb,
+ size_t size)
+{
+ size_t len = size - sizeof (struct SBlock);
+ char pt[len];
+ struct GNUNET_CRYPTO_AesSessionKey skey;
+ struct GNUNET_CRYPTO_AesInitializationVector iv;
+ struct GNUNET_FS_Uri *uri;
+ struct GNUNET_CONTAINER_MetaData *meta;
const char *id;
const char *uris;
- unsigned int len;
- unsigned int off;
- int isRoot;
-
- len = size - sizeof (GNUNET_EC_SBlock);
- off = GNUNET_string_buffer_tokenize ((const char *) &sb[1],
- len, 2, &id, &uris);
- if (off == 0)
+ size_t off;
+ char *emsg;
+ struct GNUNET_HashCode key;
+ char *identifier;
+
+ /* decrypt */
+ identifier = sc->uri->data.sks.identifier;
+ GNUNET_CRYPTO_hash (identifier, strlen (identifier), &key);
+ GNUNET_CRYPTO_hash_to_aes_key (&key, &skey, &iv);
+ if (-1 == GNUNET_CRYPTO_aes_decrypt (&sb[1], len, &skey, &iv, pt))
+ {
+ GNUNET_break (0);
+ return;
+ }
+ /* parse */
+ off = GNUNET_STRINGS_buffer_tokenize (pt, len, 2, &id, &uris);
+ if (0 == off)
+ {
+ GNUNET_break_op (0); /* sblock malformed */
+ return;
+ }
+ meta = GNUNET_CONTAINER_meta_data_deserialize (&pt[off], len - off);
+ if (meta == NULL)
+ {
+ GNUNET_break_op (0); /* sblock malformed */
+ return;
+ }
+ uri = GNUNET_FS_uri_parse (uris, &emsg);
+ if (NULL == uri)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Failed to parse URI `%s': %s\n", uris,
+ emsg);
+ GNUNET_break_op (0); /* sblock malformed */
+ GNUNET_free_non_null (emsg);
+ GNUNET_CONTAINER_meta_data_destroy (meta);
+ return;
+ }
+ /* process */
+ process_sks_result (sc, id, uri, meta);
+ /* clean up */
+ GNUNET_FS_uri_destroy (uri);
+ GNUNET_CONTAINER_meta_data_destroy (meta);
+}
+
+
+/**
+ * Process a search result.
+ *
+ * @param sc our search context
+ * @param type type of the result
+ * @param expiration when it will expire
+ * @param data the (encrypted) response
+ * @param size size of data
+ */
+static void
+process_result (struct GNUNET_FS_SearchContext *sc, enum GNUNET_BLOCK_Type type,
+ struct GNUNET_TIME_Absolute expiration,
+ const void *data,
+ size_t size)
+{
+ if (GNUNET_TIME_absolute_get_duration (expiration).rel_value > 0)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Result received has already expired.\n");
+ return; /* result expired */
+ }
+ switch (type)
+ {
+ case GNUNET_BLOCK_TYPE_FS_KBLOCK:
+ if (!GNUNET_FS_uri_test_ksk (sc->uri))
{
- GNUNET_GE_BREAK_OP (ectx, 0); /* sblock malformed */
- return GNUNET_SYSERR;
+ GNUNET_break (0);
+ return;
}
- fi.meta = GNUNET_meta_data_deserialize (ectx, &id[off], len - off);
- if (fi.meta == NULL)
+ if (sizeof (struct KBlock) > size)
{
- GNUNET_GE_BREAK_OP (ectx, 0); /* sblock malformed */
- return GNUNET_SYSERR;
+ GNUNET_break_op (0);
+ return;
}
- isRoot = 0 == memcmp (&sb->identifier, &allZeros, sizeof (GNUNET_HashCode));
- fi.uri = GNUNET_ECRS_string_to_uri (ectx, uris);
- if ((isRoot) && (fi.uri == NULL))
+ process_kblock (sc, data, size);
+ break;
+ case GNUNET_BLOCK_TYPE_FS_SBLOCK:
+ if (!GNUNET_FS_uri_test_sks (sc->uri))
{
- fi.uri = GNUNET_malloc (sizeof (URI));
- fi.uri->type = sks;
- GNUNET_hash (&sb->subspace,
- sizeof (GNUNET_RSA_PublicKey),
- &fi.uri->data.sks.namespace);
- fi.uri->data.sks.identifier = GNUNET_strdup (id);
+ GNUNET_break (0);
+ return;
}
- if (fi.uri == NULL)
+ if (sizeof (struct SBlock) > size)
{
- GNUNET_GE_BREAK_OP (ectx, 0); /* sblock malformed */
- GNUNET_meta_data_destroy (fi.meta);
- return GNUNET_SYSERR;
+ GNUNET_break_op (0);
+ return;
}
- if (sqc->spcb != NULL)
+ process_sblock (sc, data, size);
+ break;
+ case GNUNET_BLOCK_TYPE_FS_NBLOCK:
+ if (!GNUNET_FS_uri_test_ksk (sc->uri))
{
- ret = sqc->spcb (&fi, key, isRoot, sqc->spcbClosure);
- if (ret == GNUNET_SYSERR)
- sqc->aborted = GNUNET_YES;
+ GNUNET_break (0);
+ return;
}
- else
- ret = GNUNET_OK;
- if ((strlen (id) > 0) && (strlen (uris) > 0))
+ if (sizeof (struct NBlock) > size)
{
- updateURI.type = sks;
- GNUNET_hash (&sb->subspace,
- sizeof (GNUNET_RSA_PublicKey),
- &updateURI.data.sks.namespace);
- updateURI.data.sks.identifier = GNUNET_strdup (id);
- add_search_for_uri (&updateURI, sqc);
- GNUNET_free (updateURI.data.sks.identifier);
+ GNUNET_break_op (0);
+ return;
}
- GNUNET_meta_data_destroy (fi.meta);
- GNUNET_ECRS_uri_destroy (fi.uri);
- return ret;
+ 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;
+ default:
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("Got result with unknown block type `%d', ignoring"), type);
+ break;
+ }
+}
+
+
+/**
+ * Shutdown any existing connection to the FS
+ * service and try to establish a fresh one
+ * (and then re-transmit our search request).
+ *
+ * @param sc the search to reconnec
+ */
+static void
+try_reconnect (struct GNUNET_FS_SearchContext *sc);
+
+
+/**
+ * Type of a function to call when we receive a message
+ * from the service.
+ *
+ * @param cls closure
+ * @param msg message received, NULL on timeout or fatal error
+ */
+static void
+receive_results (void *cls, const struct GNUNET_MessageHeader *msg)
+{
+ struct GNUNET_FS_SearchContext *sc = cls;
+ const struct ClientPutMessage *cm;
+ uint16_t msize;
+
+ if ((NULL == msg) || (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_FS_PUT) ||
+ (ntohs (msg->size) <= sizeof (struct ClientPutMessage)))
+ {
+ try_reconnect (sc);
+ return;
+ }
+ msize = ntohs (msg->size);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Receiving %u bytes of result from fs service\n", msize);
+ cm = (const struct ClientPutMessage *) msg;
+ process_result (sc, ntohl (cm->type),
+ GNUNET_TIME_absolute_ntoh (cm->expiration), &cm[1],
+ msize - sizeof (struct ClientPutMessage));
+ /* continue receiving */
+ GNUNET_CLIENT_receive (sc->client, &receive_results, sc,
+ GNUNET_TIME_UNIT_FOREVER_REL);
}
+
/**
- * Process replies received in response to our
- * queries. Verifies, decrypts and passes valid
- * replies to the callback.
+ * Schedule the transmission of the (next) search request
+ * to the service.
*
- * @return GNUNET_SYSERR if the entry is malformed
+ * @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.
+ */
+ struct GNUNET_HashCode *xoff;
+
+ /**
+ * Search context we are iterating for.
+ */
+ struct GNUNET_FS_SearchContext *sc;
+
+ /**
+ * Keyword offset the search result must match (0 for SKS)
+ */
+ unsigned int keyword_offset;
+};
+
+
+/**
+ * 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
-receive_response_callback (const GNUNET_HashCode * key,
- const GNUNET_DatastoreValue * value,
- void *cls, unsigned long long uid)
-{
- struct PendingSearch *ps = cls;
- struct GNUNET_ECRS_SearchContext *sqc = ps->context;
- struct GNUNET_GE_Context *ectx = sqc->ectx;
- unsigned int type;
- GNUNET_ECRS_FileInfo fi;
- unsigned int size;
- int ret;
- GNUNET_HashCode query;
- GNUNET_CronTime expiration;
-
- expiration = GNUNET_ntohll (value->expiration_time);
- if (expiration < GNUNET_get_time ())
- return GNUNET_OK; /* expired, ignore! */
- type = ntohl (value->type);
- size = ntohl (value->size) - sizeof (GNUNET_DatastoreValue);
-#if DEBUG_SEARCH
- GNUNET_GE_LOG (ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST | GNUNET_GE_USER,
- "Search received reply of type %u and size %u.\n", type,
- size);
-#endif
- if (GNUNET_OK !=
- GNUNET_EC_file_block_check_and_get_query (size,
- (const GNUNET_EC_DBlock *)
- &value[1], GNUNET_YES,
- &query))
- {
- GNUNET_GE_BREAK_OP (NULL, 0);
- return GNUNET_SYSERR;
- }
- if (!((0 == memcmp (&query,
- (GNUNET_HashCode *) & ps[1], sizeof (GNUNET_HashCode)))
- && ((ps->type == type) || (ps->type == GNUNET_ECRS_BLOCKTYPE_ANY))
- && (GNUNET_YES ==
- GNUNET_EC_is_block_applicable_for_query (type, size,
- (const GNUNET_EC_DBlock
- *) &value[1], &query,
- ps->keyCount,
- (GNUNET_HashCode *) &
- ps[1]))))
- {
- return GNUNET_OK; /* not a match */
- }
+build_result_set (void *cls, const struct GNUNET_HashCode * key, void *value)
+{
+ struct MessageBuilderContext *mbc = cls;
+ struct GNUNET_FS_SearchResult *sr = value;
- switch (type)
- {
- case GNUNET_ECRS_BLOCKTYPE_KEYWORD:
- {
- GNUNET_EC_KBlock *kb;
- const char *dstURI;
-#if DEBUG_SEARCH
- GNUNET_EncName enc;
-#endif
- int j;
-
- if (size < sizeof (GNUNET_EC_KBlock))
- {
- GNUNET_GE_BREAK_OP (NULL, 0);
- return GNUNET_SYSERR;
- }
- kb = GNUNET_malloc (size);
- memcpy (kb, &value[1], size);
-#if DEBUG_SEARCH
- IF_GELOG (ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST |
- GNUNET_GE_USER, GNUNET_hash_to_enc (&ps->decryptKey, &enc));
- GNUNET_GE_LOG (ectx,
- GNUNET_GE_DEBUG | GNUNET_GE_REQUEST |
- GNUNET_GE_USER,
- "Decrypting KBlock with key %s.\n", &enc);
-#endif
- GNUNET_ECRS_decryptInPlace (&ps->decryptKey,
- &kb[1], size - sizeof (GNUNET_EC_KBlock));
- j = sizeof (GNUNET_EC_KBlock);
- while ((j < size) && (((const char *) kb)[j] != '\0'))
- j++;
- if (j == size)
- {
- GNUNET_GE_BREAK_OP (ectx, 0); /* kblock malformed */
- GNUNET_free (kb);
- return GNUNET_SYSERR;
- }
- dstURI = (const char *) &kb[1];
- j++;
- fi.meta = GNUNET_meta_data_deserialize (ectx,
- &((const char *)
- kb)[j], size - j);
- if (fi.meta == NULL)
- {
- GNUNET_GE_BREAK_OP (ectx, 0); /* kblock malformed */
- GNUNET_free (kb);
- return GNUNET_SYSERR;
- }
- fi.uri = GNUNET_ECRS_string_to_uri (ectx, dstURI);
- if (fi.uri == NULL)
- {
- GNUNET_GE_BREAK_OP (ectx, 0); /* kblock malformed */
- GNUNET_meta_data_destroy (fi.meta);
- GNUNET_free (kb);
- return GNUNET_SYSERR;
- }
- if (sqc->spcb != NULL)
- {
- ret = sqc->spcb (&fi,
- &ps->decryptKey, GNUNET_NO, sqc->spcbClosure);
- if (ret == GNUNET_SYSERR)
- sqc->aborted = GNUNET_YES;
- }
- else
- ret = GNUNET_OK;
- GNUNET_ECRS_uri_destroy (fi.uri);
- GNUNET_meta_data_destroy (fi.meta);
- GNUNET_free (kb);
- return ret;
- }
- case GNUNET_ECRS_BLOCKTYPE_SIGNED:
- {
- GNUNET_EC_SBlock *sb;
- int ret;
-
- if (size < sizeof (GNUNET_EC_SBlock))
- {
- GNUNET_GE_BREAK_OP (ectx, 0); /* sblock malformed */
- return GNUNET_SYSERR;
- }
- sb = GNUNET_malloc (size);
- memcpy (sb, &value[1], size);
- GNUNET_ECRS_decryptInPlace (&ps->decryptKey,
- &sb[1], size - sizeof (GNUNET_EC_SBlock));
- ret = process_sblock_result (sb, &ps->decryptKey, size, sqc);
- GNUNET_free (sb);
- return ret;
- }
- case GNUNET_ECRS_BLOCKTYPE_KEYWORD_SIGNED:
- {
- GNUNET_EC_KSBlock *kb;
- int ret;
-
- if (size < sizeof (GNUNET_EC_KSBlock))
- {
- GNUNET_GE_BREAK_OP (ectx, 0); /* ksblock malformed */
- return GNUNET_SYSERR;
- }
- kb = GNUNET_malloc (size);
- memcpy (kb, &value[1], size);
- GNUNET_ECRS_decryptInPlace (&ps->decryptKey,
- &kb->sblock,
- size - sizeof (GNUNET_EC_KBlock) -
- sizeof (unsigned int));
- ret =
- process_sblock_result (&kb->sblock, &ps->decryptKey,
- size - sizeof (GNUNET_EC_KSBlock) +
- sizeof (GNUNET_EC_SBlock), sqc);
- GNUNET_free (kb);
- return ret;
- }
- default:
- GNUNET_GE_BREAK_OP (ectx, 0);
- break;
- } /* end switch */
+ if ( (NULL != sr->keyword_bitmap) &&
+ (0 == (sr->keyword_bitmap[mbc->keyword_offset / 8] & (1 << (mbc->keyword_offset % 8)))) )
+ return GNUNET_OK; /* have no match for this keyword yet */
+ if (mbc->skip_cnt > 0)
+ {
+ mbc->skip_cnt--;
+ return GNUNET_OK;
+ }
+ if (0 == mbc->put_cnt)
+ return GNUNET_SYSERR;
+ mbc->sc->search_request_map_offset++;
+ mbc->xoff[--mbc->put_cnt] = *key;
return GNUNET_OK;
}
+
/**
- * Start search for content.
+ * Iterating over the known results, count those
+ * matching the given result range and increment
+ * put count for each.
*
- * @param uri specifies the search parameters
- * @param uri set to the URI of the uploaded file
+ * @param cls the 'struct MessageBuilderContext'
+ * @param key key for a result
+ * @param value the search result
+ * @return GNUNET_OK to continue iterating
*/
-struct GNUNET_ECRS_SearchContext *
-GNUNET_ECRS_search_start (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- struct GNUNET_FS_SearchContext *sc,
- const struct GNUNET_ECRS_URI *uri,
- unsigned int anonymityLevel,
- GNUNET_ECRS_SearchResultProcessor spcb,
- void *spcbClosure)
+static int
+find_result_set (void *cls, const struct GNUNET_HashCode * key, void *value)
{
- struct GNUNET_ECRS_SearchContext *ctx;
+ struct MessageBuilderContext *mbc = cls;
+ struct GNUNET_FS_SearchResult *sr = value;
- if (GNUNET_YES == GNUNET_ECRS_uri_test_ksk (uri))
+ if ( (NULL != sr->keyword_bitmap) &&
+ (0 == (sr->keyword_bitmap[mbc->keyword_offset / 8] & (1 << (mbc->keyword_offset % 8)))) )
+ return GNUNET_OK; /* have no match for this keyword yet */
+ mbc->put_cnt++;
+ return GNUNET_OK;
+}
+
+
+/**
+ * We're ready to transmit the search request to the
+ * file-sharing service. Do it.
+ *
+ * @param cls closure
+ * @param size number of bytes available in buf
+ * @param buf where the callee should write the message
+ * @return number of bytes written to buf
+ */
+static size_t
+transmit_search_request (void *cls, size_t size, void *buf)
+{
+ struct GNUNET_FS_SearchContext *sc = cls;
+ struct MessageBuilderContext mbc;
+ size_t msize;
+ struct SearchMessage *sm;
+ const char *identifier;
+ struct GNUNET_HashCode key;
+ struct GNUNET_HashCode idh;
+ unsigned int sqms;
+ uint32_t options;
+
+ 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 = (struct GNUNET_HashCode *) & sm[1];
+ options = SEARCH_MESSAGE_OPTION_NONE;
+ if (0 != (sc->options & GNUNET_FS_SEARCH_OPTION_LOOPBACK_ONLY))
+ options |= SEARCH_MESSAGE_OPTION_LOOPBACK_ONLY;
+ if (GNUNET_FS_uri_test_ksk (sc->uri))
+ {
+ msize = sizeof (struct SearchMessage);
+ GNUNET_assert (size >= msize);
+ mbc.keyword_offset = sc->keyword_offset;
+ /* calculate total number of known results (in put_cnt => sqms) */
+ mbc.put_cnt = 0;
+ GNUNET_CONTAINER_multihashmap_iterate (sc->master_result_map,
+ &find_result_set, &mbc);
+ sqms = mbc.put_cnt;
+ /* calculate how many results we can send in this message */
+ mbc.put_cnt = (size - msize) / sizeof (struct 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);
+
+ /* now build message */
+ msize += sizeof (struct GNUNET_HashCode) * mbc.put_cnt;
+ sm->header.size = htons (msize);
+ sm->type = htonl (GNUNET_BLOCK_TYPE_ANY);
+ sm->anonymity_level = htonl (sc->anonymity);
+ memset (&sm->target, 0, sizeof (struct GNUNET_HashCode));
+ sm->query = sc->requests[sc->keyword_offset].query;
+ GNUNET_CONTAINER_multihashmap_iterate (sc->master_result_map,
+ &build_result_set, &mbc);
+ GNUNET_assert (sqms >= sc->search_request_map_offset);
+ if (sqms != sc->search_request_map_offset)
{
- if (1 != GNUNET_ECRS_uri_get_keyword_count_from_ksk (uri))
- return NULL;
+ /* more requesting to be done... */
+ sm->options = htonl (options | SEARCH_MESSAGE_OPTION_CONTINUED);
+ schedule_transmit_search_request (sc);
+ return msize;
}
+ sm->options = htonl (options);
+ 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->type = htonl (GNUNET_BLOCK_TYPE_FS_SBLOCK);
+ sm->anonymity_level = htonl (sc->anonymity);
+ sm->target = sc->uri->data.sks.ns;
+ identifier = sc->uri->data.sks.identifier;
+ GNUNET_CRYPTO_hash (identifier, strlen (identifier), &key);
+ GNUNET_CRYPTO_hash (&key, sizeof (struct GNUNET_HashCode), &idh);
+ GNUNET_CRYPTO_hash_xor (&idh, &sm->target, &sm->query);
+ mbc.put_cnt = (size - msize) / sizeof (struct GNUNET_HashCode);
+ sqms = GNUNET_CONTAINER_multihashmap_size (sc->master_result_map);
+ mbc.put_cnt = GNUNET_MIN (mbc.put_cnt, sqms - mbc.skip_cnt);
+ mbc.keyword_offset = 0;
+ if (sc->search_request_map_offset < sqms)
+ GNUNET_assert (mbc.put_cnt > 0);
+ msize += sizeof (struct GNUNET_HashCode) * mbc.put_cnt;
+ GNUNET_CONTAINER_multihashmap_iterate (sc->master_result_map,
+ &build_result_set, &mbc);
+ sm->header.size = htons (msize);
+ GNUNET_assert (sqms >= sc->search_request_map_offset);
+ if (sqms != sc->search_request_map_offset)
{
- if (GNUNET_YES != GNUNET_ECRS_uri_test_sks (uri))
- return NULL;
+ /* more requesting to be done... */
+ sm->options = htonl (options | SEARCH_MESSAGE_OPTION_CONTINUED);
+ schedule_transmit_search_request (sc);
+ return msize;
}
- ctx = GNUNET_malloc (sizeof (struct GNUNET_ECRS_SearchContext));
- ctx->start = GNUNET_get_time ();
- ctx->anonymityLevel = anonymityLevel;
- ctx->ectx = ectx;
- ctx->cfg = cfg;
- ctx->queries = NULL;
- ctx->spcb = spcb;
- ctx->spcbClosure = spcbClosure;
- ctx->aborted = GNUNET_NO;
- ctx->sctx = sc == NULL ? GNUNET_FS_create_search_context (ectx, cfg) : sc;
- if (ctx->sctx == NULL)
+ sm->options = htonl (options);
+ }
+ GNUNET_CLIENT_receive (sc->client, &receive_results, sc,
+ GNUNET_TIME_UNIT_FOREVER_REL);
+ return msize;
+}
+
+
+/**
+ * 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 (struct GNUNET_HashCode);
+ fit = GNUNET_MIN (fit, sqms);
+ size += sizeof (struct 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.
+ *
+ * @param cls our search context
+ * @param tc unused
+ */
+static void
+do_reconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_FS_SearchContext *sc = cls;
+ struct GNUNET_CLIENT_Connection *client;
+
+ sc->task = GNUNET_SCHEDULER_NO_TASK;
+ client = GNUNET_CLIENT_connect ("fs", sc->h->cfg);
+ if (NULL == client)
+ {
+ try_reconnect (sc);
+ return;
+ }
+ sc->client = client;
+ sc->search_request_map_offset = 0;
+ sc->keyword_offset = 0;
+ schedule_transmit_search_request (sc);
+}
+
+
+/**
+ * Shutdown any existing connection to the FS
+ * service and try to establish a fresh one
+ * (and then re-transmit our search request).
+ *
+ * @param sc the search to reconnec
+ */
+static void
+try_reconnect (struct GNUNET_FS_SearchContext *sc)
+{
+ if (NULL != sc->client)
+ {
+ GNUNET_CLIENT_disconnect (sc->client);
+ sc->client = NULL;
+ }
+ if (0 == sc->reconnect_backoff.rel_value)
+ sc->reconnect_backoff = GNUNET_TIME_UNIT_MILLISECONDS;
+ else
+ sc->reconnect_backoff = GNUNET_TIME_relative_min (GNUNET_TIME_relative_multiply (sc->reconnect_backoff, 2),
+ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 10));
+
+ sc->task =
+ GNUNET_SCHEDULER_add_delayed (sc->reconnect_backoff,
+ &do_reconnect,
+ sc);
+}
+
+
+/**
+ * Start search for content, internal API.
+ *
+ * @param h handle to the file sharing subsystem
+ * @param uri specifies the search parameters; can be
+ * a KSK URI or an SKS URI.
+ * @param anonymity desired level of anonymity
+ * @param options options for the search
+ * @param cctx initial value for the client context
+ * @param psearch parent search result (for namespace update searches)
+ * @return context that can be used to control the search
+ */
+static struct GNUNET_FS_SearchContext *
+search_start (struct GNUNET_FS_Handle *h, const struct GNUNET_FS_Uri *uri,
+ uint32_t anonymity, enum GNUNET_FS_SearchOptions options,
+ void *cctx, struct GNUNET_FS_SearchResult *psearch)
+{
+ struct GNUNET_FS_SearchContext *sc;
+ struct GNUNET_FS_ProgressInfo pi;
+
+ sc = GNUNET_malloc (sizeof (struct GNUNET_FS_SearchContext));
+ sc->h = h;
+ sc->options = options;
+ sc->uri = GNUNET_FS_uri_dup (uri);
+ sc->anonymity = anonymity;
+ sc->start_time = GNUNET_TIME_absolute_get ();
+ if (NULL != psearch)
+ {
+ sc->psearch_result = psearch;
+ psearch->update_search = sc;
+ }
+ sc->master_result_map = GNUNET_CONTAINER_multihashmap_create (16, GNUNET_NO);
+ sc->client_info = cctx;
+ if (GNUNET_OK != GNUNET_FS_search_start_searching_ (sc))
+ {
+ GNUNET_FS_uri_destroy (sc->uri);
+ GNUNET_CONTAINER_multihashmap_destroy (sc->master_result_map);
+ GNUNET_free (sc);
+ return NULL;
+ }
+ GNUNET_FS_search_sync_ (sc);
+ pi.status = GNUNET_FS_STATUS_SEARCH_START;
+ sc->client_info = GNUNET_FS_search_make_status_ (&pi, sc);
+ return sc;
+}
+
+
+/**
+ * Build the request and actually initiate the search using the
+ * GNUnet FS service.
+ *
+ * @param sc search context
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ */
+int
+GNUNET_FS_search_start_searching_ (struct GNUNET_FS_SearchContext *sc)
+{
+ unsigned int i;
+ const char *keyword;
+ struct GNUNET_HashCode hc;
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pub;
+ struct GNUNET_CRYPTO_RsaPrivateKey *pk;
+
+ GNUNET_assert (NULL == sc->client);
+ if (GNUNET_FS_uri_test_ksk (sc->uri))
+ {
+ GNUNET_assert (0 != sc->uri->data.ksk.keywordCount);
+ sc->requests =
+ GNUNET_malloc (sizeof (struct SearchRequestEntry) *
+ sc->uri->data.ksk.keywordCount);
+ for (i = 0; i < sc->uri->data.ksk.keywordCount; i++)
{
- GNUNET_free (ctx);
- return NULL;
+ keyword = &sc->uri->data.ksk.keywords[i][1];
+ GNUNET_CRYPTO_hash (keyword, strlen (keyword), &hc);
+ pk = GNUNET_CRYPTO_rsa_key_create_from_hash (&hc);
+ GNUNET_assert (NULL != pk);
+ GNUNET_CRYPTO_rsa_key_get_public (pk, &pub);
+ GNUNET_CRYPTO_rsa_key_free (pk);
+ GNUNET_CRYPTO_hash (&pub,
+ sizeof (struct
+ GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
+ &sc->requests[i].query);
+ sc->requests[i].mandatory = (sc->uri->data.ksk.keywords[i][0] == '+');
+ if (sc->requests[i].mandatory)
+ sc->mandatory_count++;
+ sc->requests[i].results = GNUNET_CONTAINER_multihashmap_create (4, GNUNET_NO);
+ GNUNET_CRYPTO_hash (keyword, strlen (keyword), &sc->requests[i].key);
}
- ctx->my_sctx = (sc == NULL);
- add_search_for_uri (uri, ctx);
- return ctx;
+ }
+ sc->client = GNUNET_CLIENT_connect ("fs", sc->h->cfg);
+ if (NULL == sc->client)
+ return GNUNET_SYSERR;
+ schedule_transmit_search_request (sc);
+ return GNUNET_OK;
}
+
/**
- * Stop search for content.
+ * Freeze probes for the given search result.
+ *
+ * @param cls the global FS handle
+ * @param key the key for the search result (unused)
+ * @param value the search result to free
+ * @return GNUNET_OK
+ */
+static int
+search_result_freeze_probes (void *cls, const struct GNUNET_HashCode * key,
+ void *value)
+{
+ struct GNUNET_FS_SearchResult *sr = value;
+
+ if (NULL != sr->probe_ctx)
+ {
+ GNUNET_FS_download_stop (sr->probe_ctx, GNUNET_YES);
+ sr->probe_ctx = NULL;
+ }
+ if (GNUNET_SCHEDULER_NO_TASK != sr->probe_cancel_task)
+ {
+ GNUNET_SCHEDULER_cancel (sr->probe_cancel_task);
+ sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (NULL != sr->update_search)
+ GNUNET_FS_search_pause (sr->update_search);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Resume probes for the given search result.
+ *
+ * @param cls the global FS handle
+ * @param key the key for the search result (unused)
+ * @param value the search result to free
+ * @return GNUNET_OK
+ */
+static int
+search_result_resume_probes (void *cls, const struct GNUNET_HashCode * key,
+ void *value)
+{
+ struct GNUNET_FS_SearchResult *sr = value;
+
+ GNUNET_FS_search_start_probe_ (sr);
+ if (NULL != sr->update_search)
+ GNUNET_FS_search_continue (sr->update_search);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Signal suspend and free the given search result.
+ *
+ * @param cls the global FS handle
+ * @param key the key for the search result (unused)
+ * @param value the search result to free
+ * @return GNUNET_OK
+ */
+static int
+search_result_suspend (void *cls, const struct GNUNET_HashCode * key, void *value)
+{
+ struct GNUNET_FS_SearchContext *sc = cls;
+ struct GNUNET_FS_SearchResult *sr = value;
+ struct GNUNET_FS_ProgressInfo pi;
+
+ if (NULL != sr->download)
+ {
+ GNUNET_FS_download_signal_suspend_ (sr->download);
+ sr->download = NULL;
+ }
+ if (NULL != sr->probe_ctx)
+ {
+ GNUNET_FS_download_stop (sr->probe_ctx, GNUNET_YES);
+ sr->probe_ctx = NULL;
+ }
+ if (NULL != sr->update_search)
+ {
+ GNUNET_FS_search_signal_suspend_ (sr->update_search);
+ sr->update_search = NULL;
+ }
+ pi.status = GNUNET_FS_STATUS_SEARCH_RESULT_SUSPEND;
+ pi.value.search.specifics.result_suspend.cctx = sr->client_info;
+ pi.value.search.specifics.result_suspend.meta = sr->meta;
+ pi.value.search.specifics.result_suspend.uri = sr->uri;
+ sr->client_info = GNUNET_FS_search_make_status_ (&pi, sc);
+ GNUNET_break (NULL == sr->client_info);
+ GNUNET_free_non_null (sr->serialization);
+ GNUNET_FS_uri_destroy (sr->uri);
+ GNUNET_CONTAINER_meta_data_destroy (sr->meta);
+ if (GNUNET_SCHEDULER_NO_TASK != sr->probe_cancel_task)
+ {
+ GNUNET_SCHEDULER_cancel (sr->probe_cancel_task);
+ sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ GNUNET_free_non_null (sr->keyword_bitmap);
+ GNUNET_free (sr);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Create SUSPEND event for the given search operation
+ * and then clean up our state (without stop signal).
+ *
+ * @param cls the 'struct GNUNET_FS_SearchContext' to signal for
+ */
+void
+GNUNET_FS_search_signal_suspend_ (void *cls)
+{
+ struct GNUNET_FS_SearchContext *sc = cls;
+ struct GNUNET_FS_ProgressInfo pi;
+ unsigned int i;
+
+ GNUNET_FS_end_top (sc->h, sc->top);
+ GNUNET_CONTAINER_multihashmap_iterate (sc->master_result_map,
+ &search_result_suspend, sc);
+ pi.status = GNUNET_FS_STATUS_SEARCH_SUSPEND;
+ sc->client_info = GNUNET_FS_search_make_status_ (&pi, sc);
+ GNUNET_break (NULL == sc->client_info);
+ if (sc->task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (sc->task);
+ if (NULL != sc->client)
+ GNUNET_CLIENT_disconnect (sc->client);
+ GNUNET_CONTAINER_multihashmap_destroy (sc->master_result_map);
+ if (NULL != sc->requests)
+ {
+ GNUNET_assert (GNUNET_FS_uri_test_ksk (sc->uri));
+ for (i = 0; i < sc->uri->data.ksk.keywordCount; i++)
+ GNUNET_CONTAINER_multihashmap_destroy (sc->requests[i].results);
+ }
+ GNUNET_free_non_null (sc->requests);
+ GNUNET_free_non_null (sc->emsg);
+ GNUNET_FS_uri_destroy (sc->uri);
+ GNUNET_free_non_null (sc->serialization);
+ GNUNET_free (sc);
+}
+
+
+/**
+ * Start search for content.
+ *
+ * @param h handle to the file sharing subsystem
+ * @param uri specifies the search parameters; can be
+ * a KSK URI or an SKS URI.
+ * @param anonymity desired level of anonymity
+ * @param options options for the search
+ * @param cctx initial value for the client context
+ * @return context that can be used to control the search
+ */
+struct GNUNET_FS_SearchContext *
+GNUNET_FS_search_start (struct GNUNET_FS_Handle *h,
+ const struct GNUNET_FS_Uri *uri, uint32_t anonymity,
+ enum GNUNET_FS_SearchOptions options, void *cctx)
+{
+ struct GNUNET_FS_SearchContext *ret;
+
+ ret = search_start (h, uri, anonymity, options, cctx, NULL);
+ if (NULL == ret)
+ return NULL;
+ ret->top = GNUNET_FS_make_top (h, &GNUNET_FS_search_signal_suspend_, ret);
+ return ret;
+}
+
+
+/**
+ * Pause search.
*
- * @param uri specifies the search parameters
- * @param uri set to the URI of the uploaded file
+ * @param sc context for the search that should be paused
*/
void
-GNUNET_ECRS_search_stop (struct GNUNET_ECRS_SearchContext *ctx)
+GNUNET_FS_search_pause (struct GNUNET_FS_SearchContext *sc)
{
- struct PendingSearch *pos;
+ struct GNUNET_FS_ProgressInfo pi;
+
+ if (GNUNET_SCHEDULER_NO_TASK != sc->task)
+ GNUNET_SCHEDULER_cancel (sc->task);
+ sc->task = GNUNET_SCHEDULER_NO_TASK;
+ if (NULL != sc->client)
+ GNUNET_CLIENT_disconnect (sc->client);
+ sc->client = NULL;
+ GNUNET_FS_search_sync_ (sc);
+ GNUNET_CONTAINER_multihashmap_iterate (sc->master_result_map,
+ &search_result_freeze_probes, sc);
+ pi.status = GNUNET_FS_STATUS_SEARCH_PAUSED;
+ sc->client_info = GNUNET_FS_search_make_status_ (&pi, sc);
+}
- while (ctx->queries != NULL)
+
+/**
+ * Continue paused search.
+ *
+ * @param sc context for the search that should be resumed
+ */
+void
+GNUNET_FS_search_continue (struct GNUNET_FS_SearchContext *sc)
+{
+ struct GNUNET_FS_ProgressInfo pi;
+
+ GNUNET_assert (NULL == sc->client);
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == sc->task);
+ do_reconnect (sc, NULL);
+ GNUNET_FS_search_sync_ (sc);
+ pi.status = GNUNET_FS_STATUS_SEARCH_CONTINUED;
+ sc->client_info = GNUNET_FS_search_make_status_ (&pi, sc);
+ GNUNET_CONTAINER_multihashmap_iterate (sc->master_result_map,
+ &search_result_resume_probes, sc);
+}
+
+
+/**
+ * Signal stop for the given search result.
+ *
+ * @param cls the global FS handle
+ * @param key the key for the search result (unused)
+ * @param value the search result to free
+ * @return GNUNET_OK
+ */
+static int
+search_result_stop (void *cls, const struct GNUNET_HashCode * key, void *value)
+{
+ struct GNUNET_FS_SearchContext *sc = cls;
+ struct GNUNET_FS_SearchResult *sr = value;
+ struct GNUNET_FS_ProgressInfo pi;
+
+ if (NULL != sr->probe_ctx)
+ {
+ GNUNET_FS_download_stop (sr->probe_ctx, GNUNET_YES);
+ sr->probe_ctx = NULL;
+ }
+ if (GNUNET_SCHEDULER_NO_TASK != sr->probe_cancel_task)
+ {
+ GNUNET_SCHEDULER_cancel (sr->probe_cancel_task);
+ sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+
+ if (NULL != sr->download)
+ {
+ sr->download->search = NULL;
+ sr->download->top =
+ GNUNET_FS_make_top (sr->download->h,
+ &GNUNET_FS_download_signal_suspend_, sr->download);
+ if (NULL != sr->download->serialization)
{
- pos = ctx->queries;
- ctx->queries = pos->next;
- if (!ctx->my_sctx)
- GNUNET_FS_stop_search (ctx->sctx, &receive_response_callback, pos);
- GNUNET_free (pos);
+ GNUNET_FS_remove_sync_file_ (sc->h, GNUNET_FS_SYNC_PATH_CHILD_DOWNLOAD,
+ sr->download->serialization);
+ GNUNET_free (sr->download->serialization);
+ sr->download->serialization = NULL;
}
- if (ctx->my_sctx)
- GNUNET_FS_destroy_search_context (ctx->sctx);
- GNUNET_free (ctx);
+ pi.status = GNUNET_FS_STATUS_DOWNLOAD_LOST_PARENT;
+ GNUNET_FS_download_make_status_ (&pi, sr->download);
+ GNUNET_FS_download_sync_ (sr->download);
+ sr->download = NULL;
+ }
+ pi.status = GNUNET_FS_STATUS_SEARCH_RESULT_STOPPED;
+ pi.value.search.specifics.result_stopped.cctx = sr->client_info;
+ pi.value.search.specifics.result_stopped.meta = sr->meta;
+ pi.value.search.specifics.result_stopped.uri = sr->uri;
+ sr->client_info = GNUNET_FS_search_make_status_ (&pi, sc);
+ return GNUNET_OK;
}
+
/**
- * Search for content.
+ * Free the given search result.
*
- * @param timeout how long to wait (relative)
- * @param uri specifies the search parameters
- * @param uri set to the URI of the uploaded file
+ * @param cls the global FS handle
+ * @param key the key for the search result (unused)
+ * @param value the search result to free
+ * @return GNUNET_OK
*/
-int
-GNUNET_ECRS_search (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- const struct GNUNET_ECRS_URI *uri,
- unsigned int anonymityLevel,
- GNUNET_ECRS_SearchResultProcessor spcb,
- void *spcbClosure, GNUNET_ECRS_TestTerminate tt,
- void *ttClosure)
-{
- struct GNUNET_ECRS_SearchContext *ctx;
-
- ctx =
- GNUNET_ECRS_search_start (ectx, cfg, NULL,
- uri, anonymityLevel, spcb, spcbClosure);
- if (ctx == NULL)
- return GNUNET_SYSERR;
- while (((NULL == tt) || (GNUNET_OK == tt (ttClosure)))
- && (GNUNET_NO == GNUNET_shutdown_test ())
- && (ctx->aborted == GNUNET_NO))
- GNUNET_thread_sleep (100 * GNUNET_CRON_MILLISECONDS);
- GNUNET_ECRS_search_stop (ctx);
+static int
+search_result_free (void *cls, const struct GNUNET_HashCode * key, void *value)
+{
+ struct GNUNET_FS_SearchResult *sr = value;
+
+ if (NULL != sr->update_search)
+ {
+ GNUNET_FS_search_stop (sr->update_search);
+ GNUNET_assert (NULL == sr->update_search);
+ }
+ GNUNET_break (NULL == sr->probe_ctx);
+ GNUNET_break (GNUNET_SCHEDULER_NO_TASK == sr->probe_cancel_task);
+ GNUNET_break (NULL == sr->client_info);
+ GNUNET_free_non_null (sr->serialization);
+ GNUNET_FS_uri_destroy (sr->uri);
+ GNUNET_CONTAINER_meta_data_destroy (sr->meta);
+ GNUNET_free_non_null (sr->keyword_bitmap);
+ GNUNET_free (sr);
return GNUNET_OK;
}
-/* end of search.c */
+/**
+ * Stop search for content.
+ *
+ * @param sc context for the search that should be stopped
+ */
+void
+GNUNET_FS_search_stop (struct GNUNET_FS_SearchContext *sc)
+{
+ struct GNUNET_FS_ProgressInfo pi;
+ unsigned int i;
+
+ if (NULL != sc->top)
+ GNUNET_FS_end_top (sc->h, sc->top);
+ GNUNET_CONTAINER_multihashmap_iterate (sc->master_result_map,
+ &search_result_stop, sc);
+ if (NULL != sc->psearch_result)
+ sc->psearch_result->update_search = NULL;
+ if (NULL != sc->serialization)
+ {
+ GNUNET_FS_remove_sync_file_ (sc->h,
+ (sc->psearch_result !=
+ NULL) ? GNUNET_FS_SYNC_PATH_CHILD_SEARCH :
+ GNUNET_FS_SYNC_PATH_MASTER_SEARCH,
+ sc->serialization);
+ GNUNET_FS_remove_sync_dir_ (sc->h,
+ (sc->psearch_result !=
+ NULL) ? GNUNET_FS_SYNC_PATH_CHILD_SEARCH :
+ GNUNET_FS_SYNC_PATH_MASTER_SEARCH,
+ sc->serialization);
+ GNUNET_free (sc->serialization);
+ }
+ pi.status = GNUNET_FS_STATUS_SEARCH_STOPPED;
+ sc->client_info = GNUNET_FS_search_make_status_ (&pi, sc);
+ GNUNET_break (NULL == sc->client_info);
+ if (GNUNET_SCHEDULER_NO_TASK != sc->task)
+ GNUNET_SCHEDULER_cancel (sc->task);
+ if (NULL != sc->client)
+ GNUNET_CLIENT_disconnect (sc->client);
+ GNUNET_CONTAINER_multihashmap_iterate (sc->master_result_map,
+ &search_result_free, sc);
+ GNUNET_CONTAINER_multihashmap_destroy (sc->master_result_map);
+ if (NULL != sc->requests)
+ {
+ GNUNET_assert (GNUNET_FS_uri_test_ksk (sc->uri));
+ for (i = 0; i < sc->uri->data.ksk.keywordCount; i++)
+ GNUNET_CONTAINER_multihashmap_destroy (sc->requests[i].results);
+ }
+ GNUNET_free_non_null (sc->requests);
+ GNUNET_free_non_null (sc->emsg);
+ GNUNET_FS_uri_destroy (sc->uri);
+ GNUNET_free (sc);
+}
+
+/* end of fs_search.c */
projects / oweals / gnunet.git / blobdiff