/*
This file is part of GNUnet.
- (C) 2001-2013 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2001-2014 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Tem ple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Boston, MA 02110-1301, USA.
*/
/**
* @file fs/fs_search.c
* @return #GNUNET_OK
*/
static int
-get_result_present (void *cls, const struct GNUNET_HashCode * key, void *value)
+get_result_present (void *cls,
+ const struct GNUNET_HashCode *key,
+ void *value)
{
struct GetResultContext *grc = cls;
struct GNUNET_FS_SearchResult *sr = value;
* 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)
+probe_failure_handler (void *cls)
{
struct GNUNET_FS_SearchResult *sr = cls;
- sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ sr->probe_cancel_task = NULL;
sr->availability_trials++;
GNUNET_FS_download_stop (sr->probe_ctx, GNUNET_YES);
sr->probe_ctx = NULL;
- if (GNUNET_SCHEDULER_NO_TASK != sr->probe_ping_task)
- {
- GNUNET_SCHEDULER_cancel (sr->probe_ping_task);
- sr->probe_ping_task = GNUNET_SCHEDULER_NO_TASK;
- }
+ GNUNET_FS_stop_probe_ping_task_ (sr);
GNUNET_FS_search_result_sync_ (sr);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Probe #%u for search result %p failed\n",
* 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
-probe_success_handler (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+probe_success_handler (void *cls)
{
struct GNUNET_FS_SearchResult *sr = cls;
- sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ sr->probe_cancel_task = NULL;
sr->availability_trials++;
sr->availability_success++;
GNUNET_FS_download_stop (sr->probe_ctx, GNUNET_YES);
sr->probe_ctx = NULL;
- if (GNUNET_SCHEDULER_NO_TASK != sr->probe_ping_task)
- {
- GNUNET_SCHEDULER_cancel (sr->probe_ping_task);
- sr->probe_ping_task = GNUNET_SCHEDULER_NO_TASK;
- }
+ GNUNET_FS_stop_probe_ping_task_ (sr);
GNUNET_FS_search_result_sync_ (sr);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Probe #%u for search result %p succeeded\n",
/* ignore */
break;
case GNUNET_FS_STATUS_DOWNLOAD_ERROR:
- if (GNUNET_SCHEDULER_NO_TASK != sr->probe_cancel_task)
+ if (NULL != sr->probe_cancel_task)
{
GNUNET_SCHEDULER_cancel (sr->probe_cancel_task);
- sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ sr->probe_cancel_task = NULL;
}
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)
+ if (NULL != sr->probe_cancel_task)
{
GNUNET_SCHEDULER_cancel (sr->probe_cancel_task);
- sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ sr->probe_cancel_task = NULL;
}
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)
+ if (NULL != sr->probe_cancel_task)
{
GNUNET_SCHEDULER_cancel (sr->probe_cancel_task);
- sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ sr->probe_cancel_task = NULL;
}
sr = NULL;
break;
case GNUNET_FS_STATUS_DOWNLOAD_ACTIVE:
- if (GNUNET_SCHEDULER_NO_TASK == sr->probe_cancel_task)
+ if (NULL == sr->probe_cancel_task)
{
sr->probe_active_time = GNUNET_TIME_absolute_get ();
sr->probe_cancel_task =
}
break;
case GNUNET_FS_STATUS_DOWNLOAD_INACTIVE:
- if (GNUNET_SCHEDULER_NO_TASK != sr->probe_cancel_task)
+ if (NULL != sr->probe_cancel_task)
{
GNUNET_SCHEDULER_cancel (sr->probe_cancel_task);
- sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ sr->probe_cancel_task = NULL;
}
dur = GNUNET_TIME_absolute_get_duration (sr->probe_active_time);
sr->remaining_probe_time =
/**
* Task run periodically to remind clients that a probe is active.
*
- * @param cls the 'struct GNUNET_FS_SearchResult' that we are probing for
- * @param tc scheduler context
+ * @param cls the `struct GNUNET_FS_SearchResult` that we are probing for
*/
static void
-probe_ping_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+probe_ping_task_cb (void *cls)
{
- struct GNUNET_FS_SearchResult *sr = cls;
+ struct GNUNET_FS_Handle *h = cls;
+ struct GNUNET_FS_SearchResult *sr;
- signal_probe_result (sr);
- sr->probe_ping_task
+ for (sr = h->probes_head; NULL != sr; sr = sr->next)
+ if (NULL != sr->probe_ctx->client)
+ signal_probe_result (sr);
+ h->probe_ping_task
= GNUNET_SCHEDULER_add_delayed (GNUNET_FS_PROBE_UPDATE_FREQUENCY,
- &probe_ping_task,
- sr);
+ &probe_ping_task_cb,
+ h);
+}
+
+
+/**
+ * Start the ping task for this search result.
+ *
+ * @param sr result to start pinging for.
+ */
+static void
+start_probe_ping_task (struct GNUNET_FS_SearchResult *sr)
+{
+ struct GNUNET_FS_Handle *h = sr->h;
+
+ GNUNET_CONTAINER_DLL_insert (h->probes_head,
+ h->probes_tail,
+ sr);
+ if (NULL == h->probe_ping_task)
+ h->probe_ping_task
+ = GNUNET_SCHEDULER_add_now (&probe_ping_task_cb,
+ h);
+}
+
+
+/**
+ * Stop the ping task for this search result.
+ *
+ * @param sr result to start pinging for.
+ */
+void
+GNUNET_FS_stop_probe_ping_task_ (struct GNUNET_FS_SearchResult *sr)
+{
+ struct GNUNET_FS_Handle *h = sr->h;
+
+ GNUNET_CONTAINER_DLL_remove (h->probes_head,
+ h->probes_tail,
+ sr);
+ if (NULL == h->probes_head)
+ {
+ GNUNET_SCHEDULER_cancel (h->probe_ping_task);
+ h->probe_ping_task = NULL;
+ }
}
len, sr->anonymity,
GNUNET_FS_DOWNLOAD_NO_TEMPORARIES |
GNUNET_FS_DOWNLOAD_IS_PROBE, sr, NULL);
- sr->probe_ping_task
- = GNUNET_SCHEDULER_add_now (&probe_ping_task,
- sr);
+ start_probe_ping_task (sr);
}
{
GNUNET_FS_download_stop (sr->probe_ctx, GNUNET_YES);
sr->probe_ctx = NULL;
+ GNUNET_FS_stop_probe_ping_task_ (sr);
}
- if (GNUNET_SCHEDULER_NO_TASK != sr->probe_ping_task)
- {
- GNUNET_SCHEDULER_cancel (sr->probe_ping_task);
- sr->probe_ping_task = GNUNET_SCHEDULER_NO_TASK;
- }
- if (GNUNET_SCHEDULER_NO_TASK != sr->probe_cancel_task)
+ if (NULL != sr->probe_cancel_task)
{
GNUNET_SCHEDULER_cancel (sr->probe_cancel_task);
- sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ sr->probe_cancel_task = NULL;
}
}
* @return #GNUNET_OK to continue iterating
*/
static int
-build_result_set (void *cls, const struct GNUNET_HashCode * key, void *value)
+build_result_set (void *cls,
+ const struct GNUNET_HashCode *key,
+ void *value)
{
struct MessageBuilderContext *mbc = cls;
struct GNUNET_FS_SearchResult *sr = value;
/**
- * Iterating over the known results, count those
- * matching the given result range and increment
- * put count for each.
+ * 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
* @return #GNUNET_OK to continue iterating
*/
static int
-find_result_set (void *cls, const struct GNUNET_HashCode * key, void *value)
+find_result_set (void *cls,
+ const struct GNUNET_HashCode *key,
+ void *value)
{
struct MessageBuilderContext *mbc = cls;
struct GNUNET_FS_SearchResult *sr = value;
/**
- * We're ready to transmit the search request to the
- * file-sharing service. Do it.
+ * We're ready to transmit the search request to the file-sharing
+ * service. Do it. If the request is too large to fit into a single
+ * message, transmit in increments.
*
* @param cls closure
* @param size number of bytes available in @a buf
size_t msize;
struct SearchMessage *sm;
struct GNUNET_CRYPTO_EcdsaPublicKey dpub;
- unsigned int sqms;
+ unsigned int total_seen_results; /* total number of result hashes to send */
+ unsigned int message_size_limit;
uint32_t options;
if (NULL == buf)
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];
+ 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;
msize = sizeof (struct SearchMessage);
GNUNET_assert (size >= msize);
mbc.keyword_offset = sc->keyword_offset;
- /* calculate total number of known results (in put_cnt => sqms) */
+ /* calculate total number of known results (in put_cnt => total_seen_results) */
mbc.put_cnt = 0;
GNUNET_CONTAINER_multihashmap_iterate (sc->master_result_map,
&find_result_set, &mbc);
- sqms = mbc.put_cnt;
+ total_seen_results = 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)
+ message_size_limit = (size - msize) / sizeof (struct GNUNET_HashCode);
+ mbc.put_cnt = GNUNET_MIN (message_size_limit,
+ total_seen_results - mbc.skip_cnt);
+ if (sc->search_request_map_offset < total_seen_results)
GNUNET_assert (mbc.put_cnt > 0);
/* now build message */
sm->query = sc->requests[sc->keyword_offset].uquery;
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)
+ GNUNET_assert (0 == mbc.put_cnt);
+ GNUNET_assert (total_seen_results >= sc->search_request_map_offset);
+ if (total_seen_results != sc->search_request_map_offset)
{
/* more requesting to be done... */
sm->options = htonl (options | SEARCH_MESSAGE_OPTION_CONTINUED);
}
sm->options = htonl (options);
sc->keyword_offset++;
+ sc->search_request_map_offset = 0;
if (sc->uri->data.ksk.keywordCount != sc->keyword_offset)
{
/* more requesting to be done... */
GNUNET_CRYPTO_hash (&dpub,
sizeof (dpub),
&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);
+ message_size_limit = (size - msize) / sizeof (struct GNUNET_HashCode);
+ total_seen_results = GNUNET_CONTAINER_multihashmap_size (sc->master_result_map);
+ mbc.put_cnt = GNUNET_MIN (message_size_limit,
+ total_seen_results - mbc.skip_cnt);
mbc.keyword_offset = 0;
- if (sc->search_request_map_offset < sqms)
+ if (sc->search_request_map_offset < total_seen_results)
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)
+ GNUNET_assert (total_seen_results >= sc->search_request_map_offset);
+ if (total_seen_results != sc->search_request_map_offset)
{
/* more requesting to be done... */
sm->options = htonl (options | SEARCH_MESSAGE_OPTION_CONTINUED);
}
sm->options = htonl (options);
}
- GNUNET_CLIENT_receive (sc->client, &receive_results, sc,
+ GNUNET_CLIENT_receive (sc->client,
+ &receive_results, sc,
GNUNET_TIME_UNIT_FOREVER_REL);
return msize;
}
schedule_transmit_search_request (struct GNUNET_FS_SearchContext *sc)
{
size_t size;
- unsigned int sqms;
+ unsigned int left;
unsigned int fit;
+ unsigned int request;
size = sizeof (struct SearchMessage);
- sqms =
+ left =
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;
+ request = GNUNET_MIN (fit, left);
+ size += sizeof (struct GNUNET_HashCode) * request;
GNUNET_CLIENT_notify_transmit_ready (sc->client, size,
GNUNET_CONSTANTS_SERVICE_TIMEOUT,
- GNUNET_NO, &transmit_search_request, sc);
-
+ GNUNET_NO,
+ &transmit_search_request, sc);
}
* our queries NOW.
*
* @param cls our search context
- * @param tc unused
*/
static void
-do_reconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+do_reconnect (void *cls)
{
struct GNUNET_FS_SearchContext *sc = cls;
struct GNUNET_CLIENT_Connection *client;
- sc->task = GNUNET_SCHEDULER_NO_TASK;
+ sc->task = NULL;
client = GNUNET_CLIENT_connect ("fs", sc->h->cfg);
if (NULL == client)
{
sc->client = GNUNET_CLIENT_connect ("fs", sc->h->cfg);
if (NULL == sc->client)
return GNUNET_SYSERR;
+ sc->search_request_map_offset = 0;
schedule_transmit_search_request (sc);
return GNUNET_OK;
}
{
GNUNET_FS_download_stop (sr->probe_ctx, GNUNET_YES);
sr->probe_ctx = NULL;
+ GNUNET_FS_stop_probe_ping_task_ (sr);
}
- if (GNUNET_SCHEDULER_NO_TASK != sr->probe_ping_task)
- {
- GNUNET_SCHEDULER_cancel (sr->probe_ping_task);
- sr->probe_ping_task = GNUNET_SCHEDULER_NO_TASK;
- }
- if (GNUNET_SCHEDULER_NO_TASK != sr->probe_cancel_task)
+ if (NULL != sr->probe_cancel_task)
{
GNUNET_SCHEDULER_cancel (sr->probe_cancel_task);
- sr->probe_cancel_task = GNUNET_SCHEDULER_NO_TASK;
+ sr->probe_cancel_task = NULL;
}
if (NULL != sr->update_search)
GNUNET_FS_search_pause (sr->update_search);
pi.status = GNUNET_FS_STATUS_SEARCH_SUSPEND;
sc->client_info = GNUNET_FS_search_make_status_ (&pi, sc->h, sc);
GNUNET_break (NULL == sc->client_info);
- if (sc->task != GNUNET_SCHEDULER_NO_TASK)
+ if (sc->task != NULL)
{
GNUNET_SCHEDULER_cancel (sc->task);
- sc->task = GNUNET_SCHEDULER_NO_TASK;
+ sc->task = NULL;
}
if (NULL != sc->client)
{
{
struct GNUNET_FS_ProgressInfo pi;
- if (GNUNET_SCHEDULER_NO_TASK != sc->task)
+ if (NULL != sc->task)
{
GNUNET_SCHEDULER_cancel (sc->task);
- sc->task = GNUNET_SCHEDULER_NO_TASK;
+ sc->task = NULL;
}
if (NULL != sc->client)
GNUNET_CLIENT_disconnect (sc->client);
struct GNUNET_FS_ProgressInfo pi;
GNUNET_assert (NULL == sc->client);
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == sc->task);
- do_reconnect (sc, NULL);
+ GNUNET_assert (NULL == sc->task);
+ do_reconnect (sc);
GNUNET_FS_search_sync_ (sc);
pi.status = GNUNET_FS_STATUS_SEARCH_CONTINUED;
sc->client_info = GNUNET_FS_search_make_status_ (&pi, sc->h, sc);
GNUNET_assert (NULL == sr->update_search);
}
GNUNET_break (NULL == sr->probe_ctx);
- GNUNET_break (GNUNET_SCHEDULER_NO_TASK == sr->probe_cancel_task);
- GNUNET_break (GNUNET_SCHEDULER_NO_TASK == sr->probe_ping_task);
+ GNUNET_break (NULL == sr->probe_cancel_task);
GNUNET_break (NULL == sr->client_info);
GNUNET_free_non_null (sr->serialization);
GNUNET_FS_uri_destroy (sr->uri);
pi.status = GNUNET_FS_STATUS_SEARCH_STOPPED;
sc->client_info = GNUNET_FS_search_make_status_ (&pi, sc->h, sc);
GNUNET_break (NULL == sc->client_info);
- if (GNUNET_SCHEDULER_NO_TASK != sc->task)
+ if (NULL != sc->task)
GNUNET_SCHEDULER_cancel (sc->task);
if (NULL != sc->client)
GNUNET_CLIENT_disconnect (sc->client);
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