* @author Christian Grothoff
*
* TODO:
- * - persistence (can wait)
* - location URI suppport (can wait, easy)
* - different priority for scheduling probe downloads?
* - check if iblocks can be computed from existing blocks (can wait, hard)
= dc->client_info;
pi->value.download.pctx
= (dc->parent == NULL) ? NULL : dc->parent->client_info;
+ pi->value.download.sctx
+ = (dc->search == NULL) ? NULL : dc->search->client_info;
pi->value.download.uri
= dc->uri;
pi->value.download.filename
GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
fh = NULL;
if ( (dc->old_file_size > off) &&
- (dc->filename != NULL) )
- {
- fh = GNUNET_DISK_file_open (dc->filename,
- GNUNET_DISK_OPEN_READ,
- GNUNET_DISK_PERM_NONE);
- }
+ (dc->filename != NULL) )
+ fh = GNUNET_DISK_file_open (dc->filename,
+ GNUNET_DISK_OPEN_READ,
+ GNUNET_DISK_PERM_NONE);
if ( (fh != NULL) &&
(off ==
GNUNET_DISK_file_seek (fh,
{
GNUNET_break_op (0);
}
+ GNUNET_break (GNUNET_OK == GNUNET_DISK_file_close (fh));
return;
}
}
pos = pos->next;
}
dc->has_finished = GNUNET_YES;
+ GNUNET_FS_download_sync_ (dc);
/* signal completion */
pi.status = GNUNET_FS_STATUS_DOWNLOAD_COMPLETED;
GNUNET_FS_download_make_status_ (&pi, dc);
}
+/**
+ * Free entries in the map.
+ *
+ * @param cls unused (NULL)
+ * @param key unused
+ * @param entry entry of type "struct DownloadRequest" which is freed
+ * @return GNUNET_OK
+ */
+static int
+free_entry (void *cls,
+ const GNUNET_HashCode *key,
+ void *entry)
+{
+ GNUNET_free (entry);
+ return GNUNET_OK;
+}
+
+
/**
* Iterator over entries in the pending requests in the 'active' map for the
* reply that we just got.
}
GNUNET_assert (sm->depth == dc->treedepth);
}
- // FIXME: make persistent
if (sm->depth == dc->treedepth)
{
+ GNUNET_FS_download_sync_ (dc);
GNUNET_free (sm);
return GNUNET_YES;
}
sm->depth + 1);
}
GNUNET_free (sm);
+ GNUNET_FS_download_sync_ (dc);
return GNUNET_YES;
signal_error:
dc->th = NULL;
}
GNUNET_CLIENT_disconnect (dc->client, GNUNET_NO);
+ GNUNET_CONTAINER_multihashmap_iterate (dc->active,
+ &free_entry,
+ NULL);
+ dc->pending = NULL;
dc->client = NULL;
GNUNET_free (sm);
+ GNUNET_FS_download_sync_ (dc);
return GNUNET_NO;
}
struct GNUNET_FS_ProgressInfo pi;
GNUNET_assert (NULL != client);
+ GNUNET_assert (dc->client == NULL);
+ GNUNET_assert (dc->th == NULL);
dc->client = client;
GNUNET_CLIENT_receive (client,
&receive_results,
GNUNET_CONTAINER_multihashmap_iterate (dc->active,
&retry_entry,
dc);
- if ( (dc->th == NULL) &&
- (dc->client != NULL) )
- dc->th = GNUNET_CLIENT_notify_transmit_ready (dc->client,
- sizeof (struct SearchMessage),
- GNUNET_CONSTANTS_SERVICE_TIMEOUT,
- GNUNET_NO,
- &transmit_download_request,
- dc);
+ dc->th = GNUNET_CLIENT_notify_transmit_ready (dc->client,
+ sizeof (struct SearchMessage),
+ GNUNET_CONSTANTS_SERVICE_TIMEOUT,
+ GNUNET_NO,
+ &transmit_download_request,
+ dc);
}
}
+/**
+ * Create SUSPEND event for the given download operation
+ * and then clean up our state (without stop signal).
+ *
+ * @param cls the 'struct GNUNET_FS_DownloadContext' to signal for
+ */
+void
+GNUNET_FS_download_signal_suspend_ (void *cls)
+{
+ struct GNUNET_FS_DownloadContext *dc = cls;
+ struct GNUNET_FS_ProgressInfo pi;
+
+ if (dc->top != NULL)
+ GNUNET_FS_end_top (dc->h, dc->top);
+ while (NULL != dc->child_head)
+ GNUNET_FS_download_signal_suspend_ (dc->child_head);
+ if (dc->search != NULL)
+ {
+ dc->search->download = NULL;
+ dc->search = NULL;
+ }
+ if (dc->job_queue != NULL)
+ {
+ GNUNET_FS_dequeue_ (dc->job_queue);
+ dc->job_queue = NULL;
+ }
+ if (dc->parent != NULL)
+ GNUNET_CONTAINER_DLL_remove (dc->parent->child_head,
+ dc->parent->child_tail,
+ dc);
+ pi.status = GNUNET_FS_STATUS_DOWNLOAD_SUSPEND;
+ GNUNET_FS_download_make_status_ (&pi, dc);
+ if (GNUNET_SCHEDULER_NO_TASK != dc->task)
+ GNUNET_SCHEDULER_cancel (dc->h->sched,
+ dc->task);
+ GNUNET_CONTAINER_multihashmap_iterate (dc->active,
+ &free_entry,
+ NULL);
+ GNUNET_CONTAINER_multihashmap_destroy (dc->active);
+ GNUNET_free_non_null (dc->filename);
+ GNUNET_CONTAINER_meta_data_destroy (dc->meta);
+ GNUNET_FS_uri_destroy (dc->uri);
+ GNUNET_free_non_null (dc->temp_filename);
+ GNUNET_free_non_null (dc->serialization);
+ GNUNET_free (dc);
+}
+
+
/**
* Download parts of a file. Note that this will store
* the blocks at the respective offset in the given file. Also, the
GNUNET_break (0);
return NULL;
}
- // FIXME: add support for "loc" URIs!
#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Starting download `%s' of %llu bytes\n",
&dc->old_file_size,
GNUNET_YES);
}
- // FIXME: set "dc->target" for LOC uris!
+ if (GNUNET_FS_uri_test_loc (dc->uri))
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_FS_uri_loc_get_peer_identity (dc->uri,
+ &dc->target));
dc->offset = offset;
dc->length = length;
dc->anonymity = anonymity;
"Download tree has depth %u\n",
dc->treedepth);
#endif
- // FIXME: make persistent
+ if (parent == NULL)
+ {
+ dc->top = GNUNET_FS_make_top (dc->h,
+ &GNUNET_FS_download_signal_suspend_,
+ dc);
+ }
pi.status = GNUNET_FS_STATUS_DOWNLOAD_START;
pi.value.download.specifics.start.meta = meta;
GNUNET_FS_download_make_status_ (&pi, dc);
&dc->uri->data.chk.chk,
0,
1 /* 0 == CHK, 1 == top */);
+ GNUNET_FS_download_sync_ (dc);
GNUNET_FS_download_start_downloading_ (dc);
return dc;
}
+/**
+ * Download parts of a file based on a search result. The download
+ * will be associated with the search result (and the association
+ * will be preserved when serializing/deserializing the state).
+ * If the search is stopped, the download will not be aborted but
+ * be 'promoted' to a stand-alone download.
+ *
+ * As with the other download function, this will store
+ * the blocks at the respective offset in the given file. Also, the
+ * download is still using the blocking of the underlying FS
+ * encoding. As a result, the download may *write* outside of the
+ * given boundaries (if offset and length do not match the 32k FS
+ * block boundaries). <p>
+ *
+ * The given range can be used to focus a download towards a
+ * particular portion of the file (optimization), not to strictly
+ * limit the download to exactly those bytes.
+ *
+ * @param h handle to the file sharing subsystem
+ * @param sr the search result to use for the download (determines uri and
+ * meta data and associations)
+ * @param filename where to store the file, maybe NULL (then no file is
+ * created on disk and data must be grabbed from the callbacks)
+ * @param tempname where to store temporary file data, not used if filename is non-NULL;
+ * can be NULL (in which case we will pick a name if needed); the temporary file
+ * may already exist, in which case we will try to use the data that is there and
+ * if it is not what is desired, will overwrite it
+ * @param offset at what offset should we start the download (typically 0)
+ * @param length how many bytes should be downloaded starting at offset
+ * @param anonymity anonymity level to use for the download
+ * @param options various download options
+ * @param cctx initial value for the client context for this download
+ * @return context that can be used to control this download
+ */
+struct GNUNET_FS_DownloadContext *
+GNUNET_FS_download_start_from_search (struct GNUNET_FS_Handle *h,
+ struct GNUNET_FS_SearchResult *sr,
+ const char *filename,
+ const char *tempname,
+ uint64_t offset,
+ uint64_t length,
+ uint32_t anonymity,
+ enum GNUNET_FS_DownloadOptions options,
+ void *cctx)
+{
+ struct GNUNET_FS_ProgressInfo pi;
+ struct GNUNET_FS_DownloadContext *dc;
+
+ if (sr->download != NULL)
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ GNUNET_assert (GNUNET_FS_uri_test_chk (sr->uri));
+ if ( (offset + length < offset) ||
+ (offset + length > sr->uri->data.chk.file_length) )
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+#if DEBUG_DOWNLOAD
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Starting download `%s' of %llu bytes\n",
+ filename,
+ (unsigned long long) length);
+#endif
+ dc = GNUNET_malloc (sizeof(struct GNUNET_FS_DownloadContext));
+ dc->h = h;
+ dc->search = sr;
+ sr->download = dc;
+ if (sr->probe_ctx != NULL)
+ {
+ GNUNET_FS_download_stop (sr->probe_ctx, GNUNET_YES);
+ sr->probe_ctx = NULL;
+ }
+ dc->uri = GNUNET_FS_uri_dup (sr->uri);
+ dc->meta = GNUNET_CONTAINER_meta_data_duplicate (sr->meta);
+ dc->client_info = cctx;
+ dc->start_time = GNUNET_TIME_absolute_get ();
+ if (NULL != filename)
+ {
+ dc->filename = GNUNET_strdup (filename);
+ if (GNUNET_YES == GNUNET_DISK_file_test (filename))
+ GNUNET_DISK_file_size (filename,
+ &dc->old_file_size,
+ GNUNET_YES);
+ }
+ if (GNUNET_FS_uri_test_loc (dc->uri))
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_FS_uri_loc_get_peer_identity (dc->uri,
+ &dc->target));
+ dc->offset = offset;
+ dc->length = length;
+ dc->anonymity = anonymity;
+ dc->options = options;
+ dc->active = GNUNET_CONTAINER_multihashmap_create (1 + 2 * (length / DBLOCK_SIZE));
+ dc->treedepth = GNUNET_FS_compute_depth (GNUNET_ntohll(dc->uri->data.chk.file_length));
+ if ( (filename == NULL) &&
+ (is_recursive_download (dc) ) )
+ {
+ if (tempname != NULL)
+ dc->temp_filename = GNUNET_strdup (tempname);
+ else
+ dc->temp_filename = GNUNET_DISK_mktemp ("gnunet-directory-download-tmp");
+ }
+
+#if DEBUG_DOWNLOAD
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Download tree has depth %u\n",
+ dc->treedepth);
+#endif
+ pi.status = GNUNET_FS_STATUS_DOWNLOAD_START;
+ pi.value.download.specifics.start.meta = dc->meta;
+ GNUNET_FS_download_make_status_ (&pi, dc);
+ schedule_block_download (dc,
+ &dc->uri->data.chk.chk,
+ 0,
+ 1 /* 0 == CHK, 1 == top */);
+ GNUNET_FS_download_sync_ (dc);
+ GNUNET_FS_download_start_downloading_ (dc);
+ return dc;
+}
+
+
/**
* Start the downloading process (by entering the queue).
*
void
GNUNET_FS_download_start_downloading_ (struct GNUNET_FS_DownloadContext *dc)
{
+ GNUNET_assert (dc->job_queue == NULL);
dc->job_queue = GNUNET_FS_queue_ (dc->h,
&activate_fs_download,
&deactivate_fs_download,
}
-/**
- * Free entries in the map.
- *
- * @param cls unused (NULL)
- * @param key unused
- * @param entry entry of type "struct DownloadRequest" which is freed
- * @return GNUNET_OK
- */
-static int
-free_entry (void *cls,
- const GNUNET_HashCode *key,
- void *entry)
-{
- GNUNET_free (entry);
- return GNUNET_OK;
-}
-
-
/**
* Stop a download (aborts if download is incomplete).
*
int do_delete)
{
struct GNUNET_FS_ProgressInfo pi;
+ int have_children;
+ if (dc->top != NULL)
+ GNUNET_FS_end_top (dc->h, dc->top);
+ if (dc->search != NULL)
+ {
+ dc->search->download = NULL;
+ dc->search = NULL;
+ }
if (dc->job_queue != NULL)
{
GNUNET_FS_dequeue_ (dc->job_queue);
dc->job_queue = NULL;
}
+ have_children = (NULL != dc->child_head) ? GNUNET_YES : GNUNET_NO;
while (NULL != dc->child_head)
GNUNET_FS_download_stop (dc->child_head,
do_delete);
- // FIXME: make unpersistent
if (dc->parent != NULL)
GNUNET_CONTAINER_DLL_remove (dc->parent->child_head,
dc->parent->child_tail,
- dc);
-
+ dc);
+ if (dc->serialization != NULL)
+ GNUNET_FS_remove_sync_file_ (dc->h,
+ ( (dc->parent != NULL) || (dc->search != NULL) )
+ ? GNUNET_FS_SYNC_PATH_CHILD_DOWNLOAD
+ : GNUNET_FS_SYNC_PATH_MASTER_DOWNLOAD ,
+ dc->serialization);
+ if ( (GNUNET_YES == have_children) &&
+ (dc->parent == NULL) )
+ GNUNET_FS_remove_sync_dir_ (dc->h,
+ (dc->search != NULL)
+ ? GNUNET_FS_SYNC_PATH_CHILD_DOWNLOAD
+ : GNUNET_FS_SYNC_PATH_MASTER_DOWNLOAD,
+ dc->serialization);
pi.status = GNUNET_FS_STATUS_DOWNLOAD_STOPPED;
GNUNET_FS_download_make_status_ (&pi, dc);
if (GNUNET_SCHEDULER_NO_TASK != dc->task)
dc->temp_filename);
GNUNET_free (dc->temp_filename);
}
- /* FIXME: clean up serialization file itself! */
GNUNET_free_non_null (dc->serialization);
GNUNET_free (dc);
}