/*
This file is part of GNUnet.
- (C) 2001-2011 Christian Grothoff (and other contributing authors)
+ (C) 2001-2012 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
* @file fs/fs_download.c
* @brief download methods
* @author Christian Grothoff
- *
- * TODO:
- * - different priority for scheduling probe downloads?
*/
#include "platform.h"
#include "gnunet_constants.h"
#include "fs_api.h"
#include "fs_tree.h"
-#define DEBUG_DOWNLOAD GNUNET_EXTRA_LOGGING
/**
* Determine if the given download (options and meta data) should cause
*/
int do_store;
+ /**
+ * When did we last transmit the request?
+ */
struct GNUNET_TIME_Absolute last_transmission;
};
GNUNET_break_op (0);
return GNUNET_SYSERR;
}
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Matching block for `%s' at offset %llu already present, no need for download!\n",
+ "Matching %u byte block for `%s' at offset %llu already present, no need for download!\n",
+ (unsigned int) len,
dc->filename, (unsigned long long) dr->offset);
-#endif
/* already got it! */
prc.dc = dc;
prc.data = enc;
GNUNET_FS_dequeue_ (dc->job_queue);
dc->job_queue = NULL;
}
+ if (GNUNET_SCHEDULER_NO_TASK != dc->task)
+ {
+ GNUNET_SCHEDULER_cancel (dc->task);
+ dc->task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (dc->rfh != NULL)
+ {
+ GNUNET_break (GNUNET_OK == GNUNET_DISK_file_close (dc->rfh));
+ dc->rfh = NULL;
+ }
GNUNET_FS_download_sync_ (dc);
/* signal completion */
pi.value.download.specifics.progress.data_len = dlen;
pi.value.download.specifics.progress.depth = 0;
pi.value.download.specifics.progress.trust_offered = 0;
+ pi.value.download.specifics.progress.block_download_duration = GNUNET_TIME_UNIT_ZERO;
GNUNET_FS_download_make_status_ (&pi, dc);
if ((NULL != dc->filename) &&
(0 !=
if (type != EXTRACTOR_METATYPE_GNUNET_FULL_DATA)
return 0;
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found %u bytes of FD!\n",
(unsigned int) data_len);
-#endif
if (GNUNET_FS_uri_chk_get_file_size (dc->uri) != data_len)
{
GNUNET_break_op (0);
uint64_t total;
size_t len;
unsigned int i;
- unsigned int chk_off;
struct DownloadRequest *drc;
uint64_t child_block_size;
const struct ContentHashKey *chks;
drc = dr->children[i];
GNUNET_assert (drc->offset >= dr->offset);
child_block_size = GNUNET_FS_tree_compute_tree_size (drc->depth);
- GNUNET_assert (0 == (drc->offset - dr->offset) % child_block_size);
- chk_off = (drc->offset - dr->offset) / child_block_size;
+ GNUNET_assert (0 == (drc->offset - dr->offset) % child_block_size);
if (drc->state == BRS_INIT)
{
drc->state = BRS_CHK_SET;
- drc->chk = chks[chk_off];
+ drc->chk = chks[drc->chk_idx];
try_top_down_reconstruction (dc, drc);
}
if (drc->state != BRS_DOWNLOAD_UP)
GNUNET_break (0);
return;
}
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Scheduling download at offset %llu and depth %u for `%s'\n",
(unsigned long long) dr->offset, dr->depth,
GNUNET_h2s (&dr->chk.query));
-#endif
if (GNUNET_NO !=
GNUNET_CONTAINER_multihashmap_contains_value (dc->active, &dr->chk.query,
dr))
}
temp_name = NULL;
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Triggering recursive download of size %llu with %u bytes MD\n",
(unsigned long long) GNUNET_FS_uri_chk_get_file_size (uri),
(unsigned int)
GNUNET_CONTAINER_meta_data_get_serialized_size (meta));
-#endif
GNUNET_FS_download_start (dc->h, uri, meta, full_name, temp_name, 0,
GNUNET_FS_uri_chk_get_file_size (uri),
dc->anonymity, dc->options, NULL, dc);
int i;
struct ContentHashKey *chkarr;
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received block `%s' matching pending request at depth %u and offset %llu/%llu\n",
+ "Received %u byte block `%s' matching pending request at depth %u and offset %llu/%llu\n",
+ (unsigned int) prc->size,
GNUNET_h2s (key), dr->depth, (unsigned long long) dr->offset,
(unsigned long long) GNUNET_ntohll (dc->uri->data.
chk.file_length));
-
-#endif
bs = GNUNET_FS_tree_calculate_block_size (GNUNET_ntohll
(dc->uri->data.chk.file_length),
dr->offset, dr->depth);
dr->is_pending = GNUNET_NO;
}
-
GNUNET_CRYPTO_hash_to_aes_key (&dr->chk.key, &skey, &iv);
if (-1 == GNUNET_CRYPTO_aes_decrypt (prc->data, prc->size, &skey, &iv, pt))
{
dc->filename, STRERROR (errno));
goto signal_error;
}
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Saving decrypted block to disk at offset %llu\n",
(unsigned long long) off);
-#endif
if ((off != GNUNET_DISK_file_seek (fh, off, GNUNET_DISK_SEEK_SET)))
{
GNUNET_asprintf (&dc->emsg,
&trigger_recursive_download, dc);
}
+ GNUNET_assert (dc->completed <= dc->length);
dr->state = BRS_DOWNLOAD_DOWN;
pi.status = GNUNET_FS_STATUS_DOWNLOAD_PROGRESS;
pi.value.download.specifics.progress.data = pt;
pi.value.download.specifics.progress.depth = dr->depth;
pi.value.download.specifics.progress.trust_offered = 0;
if (prc->last_transmission.abs_value != GNUNET_TIME_UNIT_FOREVER_ABS.abs_value)
- pi.value.download.specifics.progress.block_download_duration =
- GNUNET_TIME_absolute_get_duration (prc->last_transmission);
+ pi.value.download.specifics.progress.block_download_duration
+ = GNUNET_TIME_absolute_get_duration (prc->last_transmission);
else
- pi.value.download.specifics.progress.block_download_duration.rel_value =
- GNUNET_TIME_UNIT_FOREVER_REL.rel_value;
+ pi.value.download.specifics.progress.block_download_duration
+ = GNUNET_TIME_UNIT_ZERO; /* found locally */
GNUNET_FS_download_make_status_ (&pi, dc);
- GNUNET_assert (dc->completed <= dc->length);
if (dr->depth == 0)
propagate_up (dr);
if (dc->completed == dc->length)
{
/* download completed, signal */
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Download completed, truncating file to desired length %llu\n",
(unsigned long long) GNUNET_ntohll (dc->uri->data.
chk.file_length));
-#endif
/* truncate file to size (since we store IBlocks at the end) */
if (dc->filename != NULL)
{
return GNUNET_YES;
}
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Triggering downloads of children (this block was at depth %u and offset %llu)\n",
dr->depth, (unsigned long long) dr->offset);
-#endif
GNUNET_assert (0 == (prc->size % sizeof (struct ContentHashKey)));
chkarr = (struct ContentHashKey *) pt;
- for (i = (prc->size / sizeof (struct ContentHashKey)) - 1; i >= 0; i--)
+ for (i = dr->num_children - 1; i >= 0; i--)
{
drc = dr->children[i];
switch (drc->state)
{
case BRS_INIT:
- drc->chk = chkarr[i];
+ drc->chk = chkarr[drc->chk_idx];
drc->state = BRS_CHK_SET;
- schedule_block_download (dc, drc);
+ if (GNUNET_YES == dc->issue_requests)
+ schedule_block_download (dc, drc);
break;
case BRS_RECONSTRUCT_DOWN:
GNUNET_assert (0);
prc.do_store = GNUNET_YES;
prc.last_transmission = last_transmission;
GNUNET_CRYPTO_hash (data, size, &prc.query);
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received result for query `%s' from `%s'-service\n",
GNUNET_h2s (&prc.query), "FS");
-#endif
GNUNET_CONTAINER_multihashmap_get_multiple (dc->active, &prc.query,
&process_result_with_request,
&prc);
dc->th = NULL;
if (NULL == buf)
{
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Transmitting download request failed, trying to reconnect\n");
-#endif
try_reconnect (dc);
return 0;
}
while ((NULL != (dr = dc->pending_head)) &&
(size >= msize + sizeof (struct SearchMessage)))
{
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Transmitting download request for `%s' to `%s'-service\n",
GNUNET_h2s (&dr->chk.query), "FS");
-#endif
memset (sm, 0, sizeof (struct SearchMessage));
sm->header.size = htons (sizeof (struct SearchMessage));
sm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_START_SEARCH);
if (NULL != dc->client)
{
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Moving all requests back to pending list\n");
-#endif
if (NULL != dc->th)
{
GNUNET_CLIENT_notify_transmit_ready_cancel (dc->th);
dc->in_receive = GNUNET_NO;
dc->client = NULL;
}
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Will try to reconnect in 1s\n");
-#endif
dc->task =
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS, &do_reconnect,
dc);
struct GNUNET_FS_DownloadContext *dc = cls;
struct GNUNET_FS_ProgressInfo pi;
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Download activated\n");
-#endif
GNUNET_assert (NULL != client);
GNUNET_assert (dc->client == NULL);
GNUNET_assert (dc->th == NULL);
dc->pending_head = NULL;
dc->pending_tail = NULL;
GNUNET_CONTAINER_multihashmap_iterate (dc->active, &retry_entry, dc);
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Asking for transmission to FS service\n");
-#endif
if (dc->pending_head != NULL)
{
dc->th =
struct GNUNET_FS_DownloadContext *dc = cls;
struct GNUNET_FS_ProgressInfo pi;
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Download deactivated\n");
-#endif
if (NULL != dc->th)
{
GNUNET_CLIENT_notify_transmit_ready_cancel (dc->th);
* (recursively) Create a download request structure.
*
* @param parent parent of the current entry
+ * @param chk_idx index of the chk for this block in the parent block
* @param depth depth of the current entry, 0 are the DBLOCKs,
* top level block is 'dc->treedepth - 1'
* @param dr_offset offset in the original file this block maps to
* the specified depth
*/
static struct DownloadRequest *
-create_download_request (struct DownloadRequest *parent, unsigned int depth,
+create_download_request (struct DownloadRequest *parent,
+ unsigned int chk_idx,
+ unsigned int depth,
uint64_t dr_offset, uint64_t file_start_offset,
uint64_t desired_length)
{
dr->parent = parent;
dr->depth = depth;
dr->offset = dr_offset;
+ dr->chk_idx = chk_idx;
if (depth > 0)
{
child_block_size = GNUNET_FS_tree_compute_tree_size (depth - 1);
if (dr_offset < file_start_offset)
head_skip = file_start_offset / child_block_size;
else
- head_skip = dr_offset / child_block_size;
+ head_skip = 0;
/* calculate index of last block at this level that is interesting (rounded up) */
- dr->num_children = file_start_offset + desired_length / child_block_size;
+ dr->num_children = (file_start_offset + desired_length - dr_offset) / child_block_size;
if (dr->num_children * child_block_size <
- file_start_offset + desired_length)
+ file_start_offset + desired_length - dr_offset)
dr->num_children++; /* round up */
-
- /* now we can get the total number of children for this block */
- dr->num_children -= head_skip;
if (dr->num_children > CHK_PER_INODE)
dr->num_children = CHK_PER_INODE; /* cap at max */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Block at offset %llu and depth %u has %u children\n",
+ (unsigned long long) dr_offset,
+ depth,
+ dr->num_children);
+
+ /* now we can get the total number of *interesting* children for this block */
+ dr->num_children -= head_skip;
/* why else would we have gotten here to begin with? (that'd be a bad logic error) */
GNUNET_assert (dr->num_children > 0);
GNUNET_malloc (dr->num_children * sizeof (struct DownloadRequest *));
for (i = 0; i < dr->num_children; i++)
dr->children[i] =
- create_download_request (dr, depth - 1,
- dr_offset + i * child_block_size,
+ create_download_request (dr, i + head_skip, depth - 1,
+ dr_offset + (i + head_skip) * child_block_size,
file_start_offset, desired_length);
}
return dr;
{
struct GNUNET_FS_DownloadContext *dc = cls;
- /* clean up state from tree encoder */
- if (dc->te != NULL)
- {
- GNUNET_FS_tree_encoder_finish (dc->te, NULL, NULL);
- dc->te = NULL;
- }
+ /* clean up state from tree encoder */
if (dc->task != GNUNET_SCHEDULER_NO_TASK)
{
GNUNET_SCHEDULER_cancel (dc->task);
dc->rfh = NULL;
}
/* start "normal" download */
+ dc->issue_requests = GNUNET_YES;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Starting normal download\n");
schedule_block_download (dc, dc->top_request);
}
dr = dc->top_request;
while (dr->depth > depth)
{
- blen = GNUNET_FS_tree_compute_tree_size (dr->depth);
+ GNUNET_assert (dr->num_children > 0);
+ blen = GNUNET_FS_tree_compute_tree_size (dr->depth - 1);
chld = (offset - dr->offset) / blen;
- GNUNET_assert (chld < dr->num_children);
- dr = dr->children[chld];
+ if (chld < dr->children[0]->chk_idx)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Block %u < %u irrelevant for our range\n",
+ chld,
+ dr->children[dr->num_children-1]->chk_idx);
+ dc->task = GNUNET_SCHEDULER_add_now (&get_next_block, dc);
+ return; /* irrelevant block */
+ }
+ if (chld > dr->children[dr->num_children-1]->chk_idx)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Block %u > %u irrelevant for our range\n",
+ chld,
+ dr->children[dr->num_children-1]->chk_idx);
+ dc->task = GNUNET_SCHEDULER_add_now (&get_next_block, dc);
+ return; /* irrelevant block */
+ }
+ dr = dr->children[chld - dr->children[0]->chk_idx];
}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Matched TE block with request at offset %llu and depth %u in state %d\n",
+ (unsigned long long) dr->offset,
+ dr->depth,
+ dr->state);
+ /* FIXME: this code needs more testing and might
+ need to handle more states... */
switch (dr->state)
{
case BRS_INIT:
case BRS_CHK_SET:
if (0 == memcmp (chk, &dr->chk, sizeof (struct ContentHashKey)))
{
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Reconstruction succeeded, can use block at offset %llu, depth %u\n",
+ (unsigned long long) offset,
+ depth);
/* block matches, hence tree below matches;
* this request is done! */
dr->state = BRS_DOWNLOAD_UP;
+ (void) GNUNET_CONTAINER_multihashmap_remove (dc->active, &dr->chk.query, dr);
+ if (GNUNET_YES == dr->is_pending)
+ {
+ GNUNET_break (0); /* how did we get here? */
+ GNUNET_CONTAINER_DLL_remove (dc->pending_head, dc->pending_tail, dr);
+ dr->is_pending = GNUNET_NO;
+ }
/* calculate how many bytes of payload this block
* corresponds to */
blen = GNUNET_FS_tree_compute_tree_size (dr->depth);
pi.value.download.specifics.progress.data_len = 0;
pi.value.download.specifics.progress.depth = 0;
pi.value.download.specifics.progress.trust_offered = 0;
+ pi.value.download.specifics.progress.block_download_duration = GNUNET_TIME_UNIT_ZERO;
GNUNET_FS_download_make_status_ (&pi, dc);
+ /* FIXME: duplicated code from 'process_result_with_request - refactor */
+ if (dc->completed == dc->length)
+ {
+ /* download completed, signal */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Download completed, truncating file to desired length %llu\n",
+ (unsigned long long) GNUNET_ntohll (dc->uri->data.
+ chk.file_length));
+ /* truncate file to size (since we store IBlocks at the end) */
+ if (dc->filename != NULL)
+ {
+ if (0 !=
+ truncate (dc->filename,
+ GNUNET_ntohll (dc->uri->data.chk.file_length)))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "truncate",
+ dc->filename);
+ }
+ }
}
else
- {
- }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Reconstruction failed, need to download block at offset %llu, depth %u\n",
+ (unsigned long long) offset,
+ depth);
break;
case BRS_DOWNLOAD_DOWN:
break;
GNUNET_assert (0);
break;
}
+ dc->task = GNUNET_SCHEDULER_add_now (&get_next_block, dc);
if ((dr == dc->top_request) && (dr->state == BRS_DOWNLOAD_UP))
- {
check_completed (dc);
- return;
- }
- dc->task = GNUNET_SCHEDULER_add_now (&get_next_block, dc);
}
struct GNUNET_FS_ProgressInfo pi;
struct GNUNET_DISK_FileHandle *fh;
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Start task running...\n");
-#endif
dc->task = GNUNET_SCHEDULER_NO_TASK;
if (dc->length == 0)
{
GNUNET_DISK_file_close (fh);
}
GNUNET_FS_download_sync_ (dc);
+ pi.status = GNUNET_FS_STATUS_DOWNLOAD_START;
+ pi.value.download.specifics.start.meta = dc->meta;
+ GNUNET_FS_download_make_status_ (&pi, dc);
check_completed (dc);
return;
}
if (dc->top_request == NULL)
{
dc->top_request =
- create_download_request (NULL, dc->treedepth - 1, 0, dc->offset,
+ create_download_request (NULL, 0, dc->treedepth - 1, 0, dc->offset,
dc->length);
dc->top_request->state = BRS_CHK_SET;
dc->top_request->chk =
chk) ? dc->uri->data.chk.chk : dc->uri->data.loc.fi.chk;
/* signal start */
GNUNET_FS_download_sync_ (dc);
+ if (NULL != dc->search)
+ GNUNET_FS_search_result_sync_ (dc->search);
pi.status = GNUNET_FS_STATUS_DOWNLOAD_START;
pi.value.download.specifics.start.meta = dc->meta;
GNUNET_FS_download_make_status_ (&pi, dc);
if (dc->rfh != NULL)
{
/* first, try top-down */
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Trying top-down reconstruction for `%s'\n", dc->filename);
-#endif
try_top_down_reconstruction (dc, dc->top_request);
switch (dc->top_request->state)
{
if ((GNUNET_FS_uri_chk_get_file_size (dc->uri) <= MAX_INLINE_SIZE) &&
(NULL != dc->meta))
{
-#if DEBUG_DOWNLOAD
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Trying to find embedded meta data for download of size %llu with %u bytes MD\n",
(unsigned long long) GNUNET_FS_uri_chk_get_file_size (dc->uri),
(unsigned int)
GNUNET_CONTAINER_meta_data_get_serialized_size (dc->meta));
-#endif
GNUNET_CONTAINER_meta_data_iterate (dc->meta, &match_full_data, dc);
if (dc->top_request->state == BRS_DOWNLOAD_UP)
{
}
if (dc->rfh != NULL)
{
- /* finally, try bottom-up */
-#if DEBUG_DOWNLOAD
+ /* finally, actually run bottom-up */
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Trying bottom-up reconstruction of file `%s'\n", dc->filename);
-#endif
dc->te =
- GNUNET_FS_tree_encoder_create (dc->h, dc->old_file_size, dc, &fh_reader,
- &reconstruct_cb, NULL,
- &reconstruct_cont);
+ GNUNET_FS_tree_encoder_create (dc->h,
+ GNUNET_FS_uri_chk_get_file_size (dc->uri),
+ dc, &fh_reader,
+ &reconstruct_cb, NULL,
+ &reconstruct_cont);
dc->task = GNUNET_SCHEDULER_add_now (&get_next_block, dc);
}
else
{
/* simple, top-level download */
+ dc->issue_requests = GNUNET_YES;
schedule_block_download (dc, dc->top_request);
}
if (dc->top_request->state == BRS_DOWNLOAD_UP)
/**
- * Download parts of a file. Note that 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>
- *
- * This function should be used to focus a download towards a
- * particular portion of the file (optimization), not to strictly
- * limit the download to exactly those bytes.
+ * Helper function to setup the download context.
*
* @param h handle to the file sharing subsystem
* @param uri the URI of the file (determines what to download); CHK or LOC URI
* @param anonymity anonymity level to use for the download
* @param options various options
* @param cctx initial value for the client context for this download
- * @param parent parent download to associate this download with (use NULL
- * for top-level downloads; useful for manually-triggered recursive downloads)
* @return context that can be used to control this download
*/
struct GNUNET_FS_DownloadContext *
-GNUNET_FS_download_start (struct GNUNET_FS_Handle *h,
- const struct GNUNET_FS_Uri *uri,
- const struct GNUNET_CONTAINER_MetaData *meta,
- 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_DownloadContext *parent)
+create_download_context (struct GNUNET_FS_Handle *h,
+ const struct GNUNET_FS_Uri *uri,
+ const struct GNUNET_CONTAINER_MetaData *meta,
+ 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_DownloadContext *dc;
GNUNET_assert (GNUNET_FS_uri_test_chk (uri) || GNUNET_FS_uri_test_loc (uri));
-
if ((offset + length < offset) ||
(offset + length > GNUNET_FS_uri_chk_get_file_size (uri)))
{
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->parent = parent;
- if (parent != NULL)
- {
- GNUNET_CONTAINER_DLL_insert (parent->child_head, parent->child_tail, dc);
- }
dc->uri = GNUNET_FS_uri_dup (uri);
dc->meta = GNUNET_CONTAINER_meta_data_duplicate (meta);
dc->client_info = cctx;
{
dc->filename = GNUNET_strdup (filename);
if (GNUNET_YES == GNUNET_DISK_file_test (filename))
- GNUNET_DISK_file_size (filename, &dc->old_file_size, GNUNET_YES);
+ GNUNET_break (GNUNET_OK == GNUNET_DISK_file_size (filename, &dc->old_file_size, GNUNET_YES, GNUNET_YES));
}
if (GNUNET_FS_uri_test_loc (dc->uri))
GNUNET_assert (GNUNET_OK ==
GNUNET_CONTAINER_multihashmap_create (1 + 2 * (length / DBLOCK_SIZE));
dc->treedepth =
GNUNET_FS_compute_depth (GNUNET_FS_uri_chk_get_file_size (dc->uri));
- if ((filename == NULL) && (is_recursive_download (dc)))
+ if ((NULL == filename) && (is_recursive_download (dc)))
{
- if (tempname != NULL)
+ if (NULL != tempname)
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",
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Starting download `%s' of %llu bytes with tree depth %u\n",
+ filename,
+ (unsigned long long) length,
dc->treedepth);
-#endif
- if (parent == NULL)
- {
+ dc->task = GNUNET_SCHEDULER_add_now (&GNUNET_FS_download_start_task_, dc);
+ return dc;
+}
+
+
+/**
+ * Download parts of a file. Note that 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>
+ *
+ * This function should 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 uri the URI of the file (determines what to download); CHK or LOC URI
+ * @param meta known metadata for the file (can be NULL)
+ * @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 options
+ * @param cctx initial value for the client context for this download
+ * @param parent parent download to associate this download with (use NULL
+ * for top-level downloads; useful for manually-triggered recursive downloads)
+ * @return context that can be used to control this download
+ */
+struct GNUNET_FS_DownloadContext *
+GNUNET_FS_download_start (struct GNUNET_FS_Handle *h,
+ const struct GNUNET_FS_Uri *uri,
+ const struct GNUNET_CONTAINER_MetaData *meta,
+ 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_DownloadContext *parent)
+{
+ struct GNUNET_FS_DownloadContext *dc;
+
+ dc = create_download_context (h, uri, meta, filename, tempname,
+ offset, length, anonymity, options, cctx);
+ if (NULL == dc)
+ return NULL;
+ dc->parent = parent;
+ if (NULL != parent)
+ GNUNET_CONTAINER_DLL_insert (parent->child_head, parent->child_tail, dc);
+ else
dc->top =
GNUNET_FS_make_top (dc->h, &GNUNET_FS_download_signal_suspend_, dc);
- }
- dc->task = GNUNET_SCHEDULER_add_now (&GNUNET_FS_download_start_task_, dc);
return dc;
}
{
struct GNUNET_FS_DownloadContext *dc;
- if ((sr == NULL) || (sr->download != NULL))
+ if ((NULL == sr) || (NULL != sr->download))
{
GNUNET_break (0);
return NULL;
}
- GNUNET_assert (GNUNET_FS_uri_test_chk (sr->uri) ||
- GNUNET_FS_uri_test_loc (sr->uri));
- if ((offset + length < offset) ||
- (offset + length > sr->uri->data.chk.file_length))
- {
- GNUNET_break (0);
+ dc = create_download_context (h, sr->uri, sr->meta, filename, tempname,
+ offset, length, anonymity, options, cctx);
+ if (NULL == dc)
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)
+ if (NULL != sr->probe_ctx)
{
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
- dc->task = GNUNET_SCHEDULER_add_now (&GNUNET_FS_download_start_task_, dc);
return dc;
}
GNUNET_assert (dc->job_queue == NULL);
dc->job_queue =
GNUNET_FS_queue_ (dc->h, &activate_fs_download, &deactivate_fs_download,
- dc, (dc->length + DBLOCK_SIZE - 1) / DBLOCK_SIZE);
+ dc, (dc->length + DBLOCK_SIZE - 1) / DBLOCK_SIZE,
+ (0 == (dc->options & GNUNET_FS_DOWNLOAD_IS_PROBE))
+ ? GNUNET_FS_QUEUE_PRIORITY_NORMAL
+ : GNUNET_FS_QUEUE_PRIORITY_PROBE);
}
if (dc->top != NULL)
GNUNET_FS_end_top (dc->h, dc->top);
-
-
if (dc->task != GNUNET_SCHEDULER_NO_TASK)
{
GNUNET_SCHEDULER_cancel (dc->task);
if (dc->search != NULL)
{
dc->search->download = NULL;
+ GNUNET_FS_search_result_sync_ (dc->search);
dc->search = NULL;
}
if (dc->job_queue != NULL)
projects / oweals / gnunet.git / blobdiff