/*
This file is part of GNUnet.
- (C) 2001, 2002, 2003, 2004, 2005, 2006, 2008, 2009, 2010 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?
- * - check if iblocks can be computed from existing blocks (can wait, hard)
*/
#include "platform.h"
#include "gnunet_constants.h"
#include "gnunet_fs_service.h"
-#include "fs.h"
+#include "fs_api.h"
#include "fs_tree.h"
-#define DEBUG_DOWNLOAD GNUNET_NO
/**
* Determine if the given download (options and meta data) should cause
static int
is_recursive_download (struct GNUNET_FS_DownloadContext *dc)
{
- return (0 != (dc->options & GNUNET_FS_DOWNLOAD_OPTION_RECURSIVE)) &&
- ( (GNUNET_YES == GNUNET_FS_meta_data_test_for_directory (dc->meta)) ||
- ( (dc->meta == NULL) &&
- ( (NULL == dc->filename) ||
- ( (strlen (dc->filename) >= strlen (GNUNET_FS_DIRECTORY_EXT)) &&
- (NULL !=
- strstr (dc->filename + strlen(dc->filename) - strlen(GNUNET_FS_DIRECTORY_EXT),
- GNUNET_FS_DIRECTORY_EXT)) ) ) ) );
+ return (0 != (dc->options & GNUNET_FS_DOWNLOAD_OPTION_RECURSIVE)) &&
+ ((GNUNET_YES == GNUNET_FS_meta_data_test_for_directory (dc->meta)) ||
+ ((NULL == dc->meta) &&
+ ((NULL == dc->filename) ||
+ ((strlen (dc->filename) >= strlen (GNUNET_FS_DIRECTORY_EXT)) &&
+ (NULL !=
+ strstr (dc->filename + strlen (dc->filename) -
+ strlen (GNUNET_FS_DIRECTORY_EXT),
+ GNUNET_FS_DIRECTORY_EXT))))));
}
* Given the offset of a block (with respect to the DBLOCKS) and its
* depth, return the offset where we would store this block in the
* file.
- *
+ *
* @param fsize overall file size
* @param off offset of the block in the file
- * @param depth depth of the block in the tree
- * @param treedepth maximum depth of the tree
+ * @param depth depth of the block in the tree, 0 for DBLOCK
* @return off for DBLOCKS (depth == treedepth),
* otherwise an offset past the end
* of the file that does not overlap
* with the range for any other block
*/
static uint64_t
-compute_disk_offset (uint64_t fsize,
- uint64_t off,
- unsigned int depth,
- unsigned int treedepth)
+compute_disk_offset (uint64_t fsize, uint64_t off, unsigned int depth)
{
unsigned int i;
- uint64_t lsize; /* what is the size of all IBlocks for depth "i"? */
- uint64_t loff; /* where do IBlocks for depth "i" start? */
- unsigned int ioff; /* which IBlock corresponds to "off" at depth "i"? */
-
- if (depth == treedepth)
+ uint64_t lsize; /* what is the size of all IBlocks for depth "i"? */
+ uint64_t loff; /* where do IBlocks for depth "i" start? */
+ unsigned int ioff; /* which IBlock corresponds to "off" at depth "i"? */
+
+ if (0 == depth)
return off;
/* first IBlocks start at the end of file, rounded up
- to full DBLOCK_SIZE */
+ * to full DBLOCK_SIZE */
loff = ((fsize + DBLOCK_SIZE - 1) / DBLOCK_SIZE) * DBLOCK_SIZE;
- lsize = ( (fsize + DBLOCK_SIZE-1) / DBLOCK_SIZE) * sizeof (struct ContentHashKey);
+ lsize =
+ ((fsize + DBLOCK_SIZE -
+ 1) / DBLOCK_SIZE) * sizeof (struct ContentHashKey);
GNUNET_assert (0 == (off % DBLOCK_SIZE));
ioff = (off / DBLOCK_SIZE);
- for (i=treedepth-1;i>depth;i--)
- {
- loff += lsize;
- lsize = (lsize + CHK_PER_INODE - 1) / CHK_PER_INODE;
- GNUNET_assert (lsize > 0);
- GNUNET_assert (0 == (ioff % CHK_PER_INODE));
- ioff /= CHK_PER_INODE;
- }
+ for (i = 1; i < depth; i++)
+ {
+ loff += lsize;
+ lsize = (lsize + CHK_PER_INODE - 1) / CHK_PER_INODE;
+ GNUNET_assert (lsize > 0);
+ GNUNET_assert (0 == (ioff % CHK_PER_INODE));
+ ioff /= CHK_PER_INODE;
+ }
return loff + ioff * sizeof (struct ContentHashKey);
}
-/**
- * Given a file of the specified treedepth and a block at the given
- * offset and depth, calculate the offset for the CHK at the given
- * index.
- *
- * @param offset the offset of the first
- * DBLOCK in the subtree of the
- * identified IBLOCK
- * @param depth the depth of the IBLOCK in the tree
- * @param treedepth overall depth of the tree
- * @param k which CHK in the IBLOCK are we
- * talking about
- * @return offset if k=0, otherwise an appropriately
- * larger value (i.e., if depth = treedepth-1,
- * the returned value should be offset+DBLOCK_SIZE)
- */
-static uint64_t
-compute_dblock_offset (uint64_t offset,
- unsigned int depth,
- unsigned int treedepth,
- unsigned int k)
-{
- unsigned int i;
- uint64_t lsize; /* what is the size of the sum of all DBlocks
- that a CHK at depth i corresponds to? */
-
- if (depth == treedepth)
- return offset;
- lsize = DBLOCK_SIZE;
- for (i=treedepth-1;i>depth;i--)
- lsize *= CHK_PER_INODE;
- return offset + k * lsize;
-}
-
-
/**
* Fill in all of the generic fields for a download event and call the
* callback.
*/
void
GNUNET_FS_download_make_status_ (struct GNUNET_FS_ProgressInfo *pi,
- struct GNUNET_FS_DownloadContext *dc)
+ struct GNUNET_FS_DownloadContext *dc)
{
pi->value.download.dc = dc;
- pi->value.download.cctx
- = 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
- = dc->filename;
- pi->value.download.size
- = dc->length;
- pi->value.download.duration
- = GNUNET_TIME_absolute_get_duration (dc->start_time);
- pi->value.download.completed
- = dc->completed;
- pi->value.download.anonymity
- = dc->anonymity;
- pi->value.download.eta
- = GNUNET_TIME_calculate_eta (dc->start_time,
- dc->completed,
- dc->length);
- pi->value.download.is_active = (dc->client == NULL) ? GNUNET_NO : GNUNET_YES;
+ pi->value.download.cctx = dc->client_info;
+ pi->value.download.pctx =
+ (NULL == dc->parent) ? NULL : dc->parent->client_info;
+ pi->value.download.sctx =
+ (NULL == dc->search) ? NULL : dc->search->client_info;
+ pi->value.download.uri = dc->uri;
+ pi->value.download.filename = dc->filename;
+ pi->value.download.size = dc->length;
+ /* FIXME: Fix duration calculation to account for pauses */
+ pi->value.download.duration =
+ GNUNET_TIME_absolute_get_duration (dc->start_time);
+ pi->value.download.completed = dc->completed;
+ pi->value.download.anonymity = dc->anonymity;
+ pi->value.download.eta =
+ GNUNET_TIME_calculate_eta (dc->start_time, dc->completed, dc->length);
+ pi->value.download.is_active = (NULL == dc->client) ? GNUNET_NO : GNUNET_YES;
if (0 == (dc->options & GNUNET_FS_DOWNLOAD_IS_PROBE))
- dc->client_info = dc->h->upcb (dc->h->upcb_cls,
- pi);
+ dc->client_info = dc->h->upcb (dc->h->upcb_cls, pi);
else
- dc->client_info = GNUNET_FS_search_probe_progress_ (NULL,
- pi);
+ dc->client_info = GNUNET_FS_search_probe_progress_ (NULL, pi);
}
+
/**
* We're ready to transmit a search request to the
- * file-sharing service. Do it. If there is
- * more than one request pending, try to send
+ * file-sharing service. Do it. If there is
+ * more than one request pending, try to send
* multiple or request another transmission.
*
* @param cls closure
* @return number of bytes written to buf
*/
static size_t
-transmit_download_request (void *cls,
- size_t size,
- void *buf);
+transmit_download_request (void *cls, size_t size, void *buf);
/**
*/
struct ProcessResultClosure
{
-
+
/**
* Hash of data.
*/
/**
* Data found in P2P network.
- */
+ */
const void *data;
/**
* Our download context.
*/
struct GNUNET_FS_DownloadContext *dc;
-
+
/**
* Number of bytes in data.
*/
* Flag to indicate if this block should be stored on disk.
*/
int do_store;
-
+
+ /**
+ * When did we last transmit the request?
+ */
+ struct GNUNET_TIME_Absolute last_transmission;
+
};
* @return GNUNET_YES (we should continue to iterate); unless serious error
*/
static int
-process_result_with_request (void *cls,
- const GNUNET_HashCode * key,
- void *value);
+process_result_with_request (void *cls, const GNUNET_HashCode * key,
+ void *value);
/**
* We've found a matching block without downloading it.
* Encrypt it and pass it to our "receive" function as
* if we had received it from the network.
- *
+ *
* @param dc download in question
* @param chk request this relates to
- * @param sm request details
+ * @param dr request details
* @param block plaintext data matching request
* @param len number of bytes in block
- * @param depth depth of the block
* @param do_store should we still store the block on disk?
* @return GNUNET_OK on success
*/
static int
encrypt_existing_match (struct GNUNET_FS_DownloadContext *dc,
- const struct ContentHashKey *chk,
- struct DownloadRequest *sm,
- const char * block,
- size_t len,
- int depth,
- int do_store)
+ const struct ContentHashKey *chk,
+ struct DownloadRequest *dr, const char *block,
+ size_t len, int do_store)
{
struct ProcessResultClosure prc;
char enc[len];
struct GNUNET_CRYPTO_AesSessionKey sk;
struct GNUNET_CRYPTO_AesInitializationVector iv;
GNUNET_HashCode query;
-
+
GNUNET_CRYPTO_hash_to_aes_key (&chk->key, &sk, &iv);
- if (-1 == GNUNET_CRYPTO_aes_encrypt (block, len,
- &sk,
- &iv,
- enc))
- {
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
+ if (-1 == GNUNET_CRYPTO_aes_encrypt (block, len, &sk, &iv, enc))
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
GNUNET_CRYPTO_hash (enc, len, &query);
- if (0 != memcmp (&query,
- &chk->query,
- sizeof (GNUNET_HashCode)))
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
-#if DEBUG_DOWNLOAD
+ if (0 != memcmp (&query, &chk->query, sizeof (GNUNET_HashCode)))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Matching block already present, no need for download!\n");
-#endif
+ "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);
/* already got it! */
prc.dc = dc;
prc.data = enc;
prc.size = len;
- prc.type = (dc->treedepth == depth)
- ? GNUNET_BLOCK_TYPE_FS_DBLOCK
- : GNUNET_BLOCK_TYPE_FS_IBLOCK;
+ prc.type =
+ (0 ==
+ dr->depth) ? GNUNET_BLOCK_TYPE_FS_DBLOCK : GNUNET_BLOCK_TYPE_FS_IBLOCK;
prc.query = chk->query;
prc.do_store = do_store;
- process_result_with_request (&prc,
- &chk->key,
- sm);
+ prc.last_transmission = GNUNET_TIME_UNIT_FOREVER_ABS;
+ process_result_with_request (&prc, &chk->key, dr);
return GNUNET_OK;
}
/**
- * Closure for match_full_data.
+ * We've lost our connection with the FS service.
+ * Re-establish it and re-transmit all of our
+ * pending requests.
+ *
+ * @param dc download context that is having trouble
*/
-struct MatchDataContext
-{
- /**
- * CHK we are looking for.
- */
- const struct ContentHashKey *chk;
+static void
+try_reconnect (struct GNUNET_FS_DownloadContext *dc);
- /**
- * Download we're processing.
- */
- struct GNUNET_FS_DownloadContext *dc;
- /**
- * Request details.
- */
- struct DownloadRequest *sm;
+/**
+ * We found an entry in a directory. Check if the respective child
+ * already exists and if not create the respective child download.
+ *
+ * @param cls the parent download
+ * @param filename name of the file in the directory
+ * @param uri URI of the file (CHK or LOC)
+ * @param meta meta data of the file
+ * @param length number of bytes in data
+ * @param data contents of the file (or NULL if they were not inlined)
+ */
+static void
+trigger_recursive_download (void *cls, const char *filename,
+ const struct GNUNET_FS_Uri *uri,
+ const struct GNUNET_CONTAINER_MetaData *meta,
+ size_t length, const void *data);
- /**
- * Overall offset in the file.
- */
- uint64_t offset;
- /**
- * Desired length of the block.
- */
- size_t len;
+/**
+ * We're done downloading a directory. Open the file and
+ * trigger all of the (remaining) child downloads.
+ *
+ * @param dc context of download that just completed
+ */
+static void
+full_recursive_download (struct GNUNET_FS_DownloadContext *dc)
+{
+ size_t size;
+ uint64_t size64;
+ void *data;
+ struct GNUNET_DISK_FileHandle *h;
+ struct GNUNET_DISK_MapHandle *m;
+
+ size64 = GNUNET_FS_uri_chk_get_file_size (dc->uri);
+ size = (size_t) size64;
+ if (size64 != (uint64_t) size)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Recursive downloads of directories larger than 4 GB are not supported on 32-bit systems\n"));
+ return;
+ }
+ if (NULL != dc->filename)
+ {
+ h = GNUNET_DISK_file_open (dc->filename, GNUNET_DISK_OPEN_READ,
+ GNUNET_DISK_PERM_NONE);
+ }
+ else
+ {
+ GNUNET_assert (NULL != dc->temp_filename);
+ h = GNUNET_DISK_file_open (dc->temp_filename, GNUNET_DISK_OPEN_READ,
+ GNUNET_DISK_PERM_NONE);
+ }
+ if (NULL == h)
+ return; /* oops */
+ data = GNUNET_DISK_file_map (h, &m, GNUNET_DISK_MAP_TYPE_READ, size);
+ if (NULL == data)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Directory too large for system address space\n"));
+ }
+ else
+ {
+ GNUNET_FS_directory_list_contents (size, data, 0,
+ &trigger_recursive_download, dc);
+ GNUNET_DISK_file_unmap (m);
+ }
+ GNUNET_DISK_file_close (h);
+ if (NULL == dc->filename)
+ {
+ if (0 != UNLINK (dc->temp_filename))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink",
+ dc->temp_filename);
+ GNUNET_free (dc->temp_filename);
+ dc->temp_filename = NULL;
+ }
+}
- /**
- * Flag set to GNUNET_YES on success.
- */
- int done;
-};
/**
- * Type of a function that libextractor calls for each
- * meta data item found.
+ * Check if all child-downloads have completed (or trigger them if
+ * necessary) and once we're completely done, signal completion (and
+ * possibly recurse to parent). This function MUST be called when the
+ * download of a file itself is done or when the download of a file is
+ * done and then later a direct child download has completed (and
+ * hence this download may complete itself).
*
- * @param cls closure (user-defined)
- * @param plugin_name name of the plugin that produced this value;
- * special values can be used (i.e. '<zlib>' for zlib being
- * used in the main libextractor library and yielding
- * meta data).
- * @param type libextractor-type describing the meta data
- * @param format basic format information about data
- * @param data_mime_type mime-type of data (not of the original file);
- * can be NULL (if mime-type is not known)
- * @param data actual meta-data found
- * @param data_len number of bytes in data
- * @return 0 to continue extracting, 1 to abort
- */
-static int
-match_full_data (void *cls,
- const char *plugin_name,
- enum EXTRACTOR_MetaType type,
- enum EXTRACTOR_MetaFormat format,
- const char *data_mime_type,
- const char *data,
- size_t data_len)
+ * @param dc download to check for completion of children
+ */
+static void
+check_completed (struct GNUNET_FS_DownloadContext *dc)
{
- struct MatchDataContext *mdc = cls;
- GNUNET_HashCode key;
+ struct GNUNET_FS_ProgressInfo pi;
+ struct GNUNET_FS_DownloadContext *pos;
- if (type == EXTRACTOR_METATYPE_GNUNET_FULL_DATA)
- {
- if ( (mdc->offset > data_len) ||
- (mdc->offset + mdc->len > data_len) )
- return 1;
- GNUNET_CRYPTO_hash (&data[mdc->offset],
- mdc->len,
- &key);
- if (0 != memcmp (&key,
- &mdc->chk->key,
- sizeof (GNUNET_HashCode)))
- {
- GNUNET_break_op (0);
- return 1;
- }
- /* match found! */
- if (GNUNET_OK !=
- encrypt_existing_match (mdc->dc,
- mdc->chk,
- mdc->sm,
- &data[mdc->offset],
- mdc->len,
- 0,
- GNUNET_YES))
- {
- GNUNET_break_op (0);
- return 1;
- }
- mdc->done = GNUNET_YES;
- return 1;
- }
- return 0;
+ /* first, check if we need to download children */
+ if ((NULL == dc->child_head) && (is_recursive_download (dc)))
+ full_recursive_download (dc);
+ /* then, check if children are done already */
+ for (pos = dc->child_head; NULL != pos; pos = pos->next)
+ {
+ if ((pos->emsg == NULL) && (pos->completed < pos->length))
+ return; /* not done yet */
+ if ((pos->child_head != NULL) && (pos->has_finished != GNUNET_YES))
+ return; /* not transitively done yet */
+ }
+ /* All of our children are done, so mark this download done */
+ dc->has_finished = GNUNET_YES;
+ if (NULL != dc->job_queue)
+ {
+ 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 (NULL != dc->rfh)
+ {
+ GNUNET_break (GNUNET_OK == GNUNET_DISK_file_close (dc->rfh));
+ dc->rfh = NULL;
+ }
+ GNUNET_FS_download_sync_ (dc);
+
+ /* signal completion */
+ pi.status = GNUNET_FS_STATUS_DOWNLOAD_COMPLETED;
+ GNUNET_FS_download_make_status_ (&pi, dc);
+
+ /* let parent know */
+ if (NULL != dc->parent)
+ check_completed (dc->parent);
}
/**
- * Schedule the download of the specified block in the tree.
+ * We got a block of plaintext data (from the meta data).
+ * Try it for upward reconstruction of the data. On success,
+ * the top-level block will move to state BRS_DOWNLOAD_UP.
*
- * @param dc overall download this block belongs to
- * @param chk content-hash-key of the block
- * @param offset offset of the block in the file
- * (for IBlocks, the offset is the lowest
- * offset of any DBlock in the subtree under
- * the IBlock)
- * @param depth depth of the block, 0 is the root of the tree
+ * @param dc context for the download
+ * @param dr download request to match against
+ * @param data plaintext data, starting from the beginning of the file
+ * @param data_len number of bytes in data
*/
static void
-schedule_block_download (struct GNUNET_FS_DownloadContext *dc,
- const struct ContentHashKey *chk,
- uint64_t offset,
- unsigned int depth)
+try_match_block (struct GNUNET_FS_DownloadContext *dc,
+ struct DownloadRequest *dr, const char *data, size_t data_len)
{
- struct DownloadRequest *sm;
- uint64_t total;
- uint64_t off;
- size_t len;
- char block[DBLOCK_SIZE];
- GNUNET_HashCode key;
- struct MatchDataContext mdc;
+ struct GNUNET_FS_ProgressInfo pi;
+ unsigned int i;
+ char enc[DBLOCK_SIZE];
+ struct ContentHashKey chks[CHK_PER_INODE];
+ struct ContentHashKey in_chk;
+ struct GNUNET_CRYPTO_AesSessionKey sk;
+ struct GNUNET_CRYPTO_AesInitializationVector iv;
+ size_t dlen;
+ struct DownloadRequest *drc;
struct GNUNET_DISK_FileHandle *fh;
-
- total = GNUNET_ntohll (dc->uri->data.chk.file_length);
- len = GNUNET_FS_tree_calculate_block_size (total,
- dc->treedepth,
- offset,
- depth);
- off = compute_disk_offset (total,
- offset,
- depth,
- dc->treedepth);
- sm = GNUNET_malloc (sizeof (struct DownloadRequest));
- sm->chk = *chk;
- sm->offset = offset;
- sm->depth = depth;
- sm->is_pending = GNUNET_YES;
- sm->next = dc->pending;
- dc->pending = sm;
- GNUNET_CONTAINER_multihashmap_put (dc->active,
- &chk->query,
- sm,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
- if ( (dc->tried_full_data == GNUNET_NO) &&
- (depth == 0) )
- {
- mdc.dc = dc;
- mdc.sm = sm;
- mdc.chk = chk;
- mdc.offset = offset;
- mdc.len = len;
- mdc.done = GNUNET_NO;
- GNUNET_CONTAINER_meta_data_iterate (dc->meta,
- &match_full_data,
- &mdc);
- if (mdc.done == GNUNET_YES)
- return;
- dc->tried_full_data = GNUNET_YES;
- }
-#if DEBUG_DOWNLOAD
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Scheduling download at offset %llu and depth %u for `%s'\n",
- (unsigned long long) offset,
- depth,
- GNUNET_h2s (&chk->query));
-#endif
- 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);
- if ( (fh != NULL) &&
- (off ==
- GNUNET_DISK_file_seek (fh,
- off,
- GNUNET_DISK_SEEK_SET) ) &&
- (len ==
- GNUNET_DISK_file_read (fh,
- block,
- len)) )
+ int complete;
+ const char *fn;
+ const char *odata;
+ size_t odata_len;
+
+ odata = data;
+ odata_len = data_len;
+ if (BRS_DOWNLOAD_UP == dr->state)
+ return;
+ if (dr->depth > 0)
+ {
+ complete = GNUNET_YES;
+ for (i = 0; i < dr->num_children; i++)
{
- GNUNET_CRYPTO_hash (block, len, &key);
- if ( (0 == memcmp (&key,
- &chk->key,
- sizeof (GNUNET_HashCode))) &&
- (GNUNET_OK ==
- encrypt_existing_match (dc,
- chk,
- sm,
- block,
- len,
- depth,
- GNUNET_NO)) )
- {
- GNUNET_break (GNUNET_OK == GNUNET_DISK_file_close (fh));
- return;
- }
+ drc = dr->children[i];
+ try_match_block (dc, drc, data, data_len);
+ if (drc->state != BRS_RECONSTRUCT_META_UP)
+ complete = GNUNET_NO;
+ else
+ chks[i] = drc->chk;
}
- if (fh != NULL)
- GNUNET_break (GNUNET_OK == GNUNET_DISK_file_close (fh));
- if (depth < dc->treedepth)
+ if (GNUNET_YES != complete)
+ return;
+ data = (const char *) chks;
+ dlen = dr->num_children * sizeof (struct ContentHashKey);
+ }
+ else
+ {
+ if (dr->offset > data_len)
+ return; /* oops */
+ dlen = GNUNET_MIN (data_len - dr->offset, DBLOCK_SIZE);
+ }
+ GNUNET_CRYPTO_hash (&data[dr->offset], dlen, &in_chk.key);
+ GNUNET_CRYPTO_hash_to_aes_key (&in_chk.key, &sk, &iv);
+ if (-1 == GNUNET_CRYPTO_aes_encrypt (&data[dr->offset], dlen, &sk, &iv, enc))
+ {
+ GNUNET_break (0);
+ return;
+ }
+ GNUNET_CRYPTO_hash (enc, dlen, &in_chk.query);
+ switch (dr->state)
+ {
+ case BRS_INIT:
+ dr->chk = in_chk;
+ dr->state = BRS_RECONSTRUCT_META_UP;
+ break;
+ case BRS_CHK_SET:
+ if (0 != memcmp (&in_chk, &dr->chk, sizeof (struct ContentHashKey)))
{
- // FIXME: try if we could
- // reconstitute this IBLOCK
- // from the existing blocks on disk (can wait)
- // (read block(s), encode, compare with
- // query; if matches, simply return)
+ /* other peer provided bogus meta data */
+ GNUNET_break_op (0);
+ break;
}
-
- if ( (dc->th == NULL) &&
- (dc->client != NULL) )
+ /* write block to disk */
+ fn = (NULL != dc->filename) ? dc->filename : dc->temp_filename;
+ fh = GNUNET_DISK_file_open (fn,
+ GNUNET_DISK_OPEN_READWRITE |
+ GNUNET_DISK_OPEN_CREATE |
+ GNUNET_DISK_OPEN_TRUNCATE,
+ GNUNET_DISK_PERM_USER_READ |
+ GNUNET_DISK_PERM_USER_WRITE |
+ GNUNET_DISK_PERM_GROUP_READ |
+ GNUNET_DISK_PERM_OTHER_READ);
+ if (NULL == fh)
{
-#if DEBUG_DOWNLOAD
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Asking for transmission to FS service\n");
-#endif
- dc->th = GNUNET_CLIENT_notify_transmit_ready (dc->client,
- sizeof (struct SearchMessage),
- GNUNET_CONSTANTS_SERVICE_TIMEOUT,
- GNUNET_NO,
- &transmit_download_request,
- dc);
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "open", fn);
+ GNUNET_asprintf (&dc->emsg, _("Failed to open file `%s' for writing"),
+ fn);
+ GNUNET_DISK_file_close (fh);
+ dr->state = BRS_ERROR;
+ pi.status = GNUNET_FS_STATUS_DOWNLOAD_ERROR;
+ pi.value.download.specifics.error.message = dc->emsg;
+ GNUNET_FS_download_make_status_ (&pi, dc);
+ return;
}
- else
+ if (data_len != GNUNET_DISK_file_write (fh, odata, odata_len))
{
-#if DEBUG_DOWNLOAD
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Transmission request not issued (%p %p)\n",
- dc->th,
- dc->client);
-#endif
-
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "write", fn);
+ GNUNET_asprintf (&dc->emsg, _("Failed to open file `%s' for writing"),
+ fn);
+ GNUNET_DISK_file_close (fh);
+ dr->state = BRS_ERROR;
+ pi.status = GNUNET_FS_STATUS_DOWNLOAD_ERROR;
+ pi.value.download.specifics.error.message = dc->emsg;
+ GNUNET_FS_download_make_status_ (&pi, dc);
+ return;
}
-
+ GNUNET_DISK_file_close (fh);
+ /* signal success */
+ dr->state = BRS_DOWNLOAD_UP;
+ dc->completed = dc->length;
+ GNUNET_FS_download_sync_ (dc);
+ pi.status = GNUNET_FS_STATUS_DOWNLOAD_PROGRESS;
+ pi.value.download.specifics.progress.data = data;
+ pi.value.download.specifics.progress.offset = 0;
+ 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 !=
+ truncate (dc->filename,
+ GNUNET_ntohll (dc->uri->data.chk.file_length))))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "truncate",
+ dc->filename);
+ check_completed (dc);
+ break;
+ default:
+ /* how did we get here? */
+ GNUNET_break (0);
+ break;
+ }
}
-
/**
- * Suggest a filename based on given metadata.
- *
- * @param md given meta data
- * @return NULL if meta data is useless for suggesting a filename
+ * Type of a function that libextractor calls for each
+ * meta data item found. If we find full data meta data,
+ * call 'try_match_block' on it.
+ *
+ * @param cls our 'struct GNUNET_FS_DownloadContext*'
+ * @param plugin_name name of the plugin that produced this value;
+ * special values can be used (i.e. '<zlib>' for zlib being
+ * used in the main libextractor library and yielding
+ * meta data).
+ * @param type libextractor-type describing the meta data
+ * @param format basic format information about data
+ * @param data_mime_type mime-type of data (not of the original file);
+ * can be NULL (if mime-type is not known)
+ * @param data actual meta-data found
+ * @param data_len number of bytes in data
+ * @return 0 to continue extracting, 1 to abort
*/
-char *
-GNUNET_FS_meta_data_suggest_filename (const struct GNUNET_CONTAINER_MetaData *md)
+static int
+match_full_data (void *cls, const char *plugin_name,
+ enum EXTRACTOR_MetaType type, enum EXTRACTOR_MetaFormat format,
+ const char *data_mime_type, const char *data, size_t data_len)
{
- static const char *mimeMap[][2] = {
- {"application/bz2", ".bz2"},
- {"application/gnunet-directory", ".gnd"},
- {"application/java", ".class"},
- {"application/msword", ".doc"},
- {"application/ogg", ".ogg"},
- {"application/pdf", ".pdf"},
- {"application/pgp-keys", ".key"},
- {"application/pgp-signature", ".pgp"},
- {"application/postscript", ".ps"},
- {"application/rar", ".rar"},
- {"application/rtf", ".rtf"},
- {"application/xml", ".xml"},
- {"application/x-debian-package", ".deb"},
- {"application/x-dvi", ".dvi"},
- {"applixation/x-flac", ".flac"},
- {"applixation/x-gzip", ".gz"},
- {"application/x-java-archive", ".jar"},
- {"application/x-java-vm", ".class"},
- {"application/x-python-code", ".pyc"},
- {"application/x-redhat-package-manager", ".rpm"},
- {"application/x-rpm", ".rpm"},
- {"application/x-tar", ".tar"},
- {"application/x-tex-pk", ".pk"},
- {"application/x-texinfo", ".texinfo"},
- {"application/x-xcf", ".xcf"},
- {"application/x-xfig", ".xfig"},
- {"application/zip", ".zip"},
-
- {"audio/midi", ".midi"},
- {"audio/mpeg", ".mp3"},
- {"audio/real", ".rm"},
- {"audio/x-wav", ".wav"},
-
- {"image/gif", ".gif"},
- {"image/jpeg", ".jpg"},
- {"image/pcx", ".pcx"},
- {"image/png", ".png"},
- {"image/tiff", ".tiff"},
- {"image/x-ms-bmp", ".bmp"},
- {"image/x-xpixmap", ".xpm"},
-
- {"text/css", ".css"},
- {"text/html", ".html"},
- {"text/plain", ".txt"},
- {"text/rtf", ".rtf"},
- {"text/x-c++hdr", ".h++"},
- {"text/x-c++src", ".c++"},
- {"text/x-chdr", ".h"},
- {"text/x-csrc", ".c"},
- {"text/x-java", ".java"},
- {"text/x-moc", ".moc"},
- {"text/x-pascal", ".pas"},
- {"text/x-perl", ".pl"},
- {"text/x-python", ".py"},
- {"text/x-tex", ".tex"},
-
- {"video/avi", ".avi"},
- {"video/mpeg", ".mpeg"},
- {"video/quicktime", ".qt"},
- {"video/real", ".rm"},
- {"video/x-msvideo", ".avi"},
- {NULL, NULL},
- };
- char *ret;
- unsigned int i;
- char *mime;
- char *base;
- const char *ext;
-
- ret = GNUNET_CONTAINER_meta_data_get_by_type (md,
- EXTRACTOR_METATYPE_FILENAME);
- if (ret != NULL)
- return ret;
- ext = NULL;
- mime = GNUNET_CONTAINER_meta_data_get_by_type (md,
- EXTRACTOR_METATYPE_MIMETYPE);
- if (mime != NULL)
- {
- i = 0;
- while ( (mimeMap[i][0] != NULL) &&
- (0 != strcmp (mime, mimeMap[i][0])))
- i++;
- if (mimeMap[i][1] == NULL)
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG |
- GNUNET_ERROR_TYPE_BULK,
- _("Did not find mime type `%s' in extension list.\n"),
- mime);
- else
- ext = mimeMap[i][1];
- GNUNET_free (mime);
- }
- base = GNUNET_CONTAINER_meta_data_get_first_by_types (md,
- EXTRACTOR_METATYPE_TITLE,
- EXTRACTOR_METATYPE_BOOK_TITLE,
- EXTRACTOR_METATYPE_ORIGINAL_TITLE,
- EXTRACTOR_METATYPE_PACKAGE_NAME,
- EXTRACTOR_METATYPE_URL,
- EXTRACTOR_METATYPE_URI,
- EXTRACTOR_METATYPE_DESCRIPTION,
- EXTRACTOR_METATYPE_ISRC,
- EXTRACTOR_METATYPE_JOURNAL_NAME,
- EXTRACTOR_METATYPE_AUTHOR_NAME,
- EXTRACTOR_METATYPE_SUBJECT,
- EXTRACTOR_METATYPE_ALBUM,
- EXTRACTOR_METATYPE_ARTIST,
- EXTRACTOR_METATYPE_KEYWORDS,
- EXTRACTOR_METATYPE_COMMENT,
- EXTRACTOR_METATYPE_UNKNOWN,
- -1);
- if ( (base == NULL) &&
- (ext == NULL) )
- return NULL;
- if (base == NULL)
- return GNUNET_strdup (ext);
- if (ext == NULL)
- return base;
- GNUNET_asprintf (&ret,
- "%s%s",
- base,
- ext);
- GNUNET_free (base);
- return ret;
+ struct GNUNET_FS_DownloadContext *dc = cls;
+
+ if (EXTRACTOR_METATYPE_GNUNET_FULL_DATA != type)
+ return 0;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found %u bytes of FD!\n",
+ (unsigned int) data_len);
+ if (GNUNET_FS_uri_chk_get_file_size (dc->uri) != data_len)
+ {
+ GNUNET_break_op (0);
+ return 1; /* bogus meta data */
+ }
+ try_match_block (dc, dc->top_request, data, data_len);
+ return 1;
}
/**
- * We've lost our connection with the FS service.
- * Re-establish it and re-transmit all of our
- * pending requests.
+ * Set the state of the given download request to
+ * BRS_DOWNLOAD_UP and propagate it up the tree.
*
- * @param dc download context that is having trouble
+ * @param dr download request that is done
*/
static void
-try_reconnect (struct GNUNET_FS_DownloadContext *dc);
-
+propagate_up (struct DownloadRequest *dr)
+{
+ unsigned int i;
-/**
- * We found an entry in a directory. Check if the respective child
- * already exists and if not create the respective child download.
- *
- * @param cls the parent download
- * @param filename name of the file in the directory
- * @param uri URI of the file (CHK or LOC)
- * @param meta meta data of the file
- * @param length number of bytes in data
- * @param data contents of the file (or NULL if they were not inlined)
- */
-static void
-trigger_recursive_download (void *cls,
- const char *filename,
- const struct GNUNET_FS_Uri *uri,
- const struct GNUNET_CONTAINER_MetaData *meta,
- size_t length,
- const void *data);
+ do
+ {
+ dr->state = BRS_DOWNLOAD_UP;
+ dr = dr->parent;
+ if (NULL == dr)
+ break;
+ for (i = 0; i < dr->num_children; i++)
+ if (dr->children[i]->state != BRS_DOWNLOAD_UP)
+ break;
+ }
+ while (i == dr->num_children);
+}
/**
- * We're done downloading a directory. Open the file and
- * trigger all of the (remaining) child downloads.
+ * Try top-down reconstruction. Before, the given request node
+ * must have the state BRS_CHK_SET. Afterwards, more nodes may
+ * have that state or advanced to BRS_DOWNLOAD_DOWN or even
+ * BRS_DOWNLOAD_UP. It is also possible to get BRS_ERROR on the
+ * top level.
*
- * @param dc context of download that just completed
+ * @param dc overall download this block belongs to
+ * @param dr block to reconstruct
*/
static void
-full_recursive_download (struct GNUNET_FS_DownloadContext *dc)
+try_top_down_reconstruction (struct GNUNET_FS_DownloadContext *dc,
+ struct DownloadRequest *dr)
{
- size_t size;
- uint64_t size64;
- void *data;
- struct GNUNET_DISK_FileHandle *h;
- struct GNUNET_DISK_MapHandle *m;
-
- size64 = GNUNET_FS_uri_chk_get_file_size (dc->uri);
- size = (size_t) size64;
- if (size64 != (uint64_t) size)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Recursive downloads of directories larger than 4 GB are not supported on 32-bit systems\n"));
- return;
- }
- if (dc->filename != NULL)
- {
- h = GNUNET_DISK_file_open (dc->filename,
- GNUNET_DISK_OPEN_READ,
- GNUNET_DISK_PERM_NONE);
- }
- else
- {
- GNUNET_assert (dc->temp_filename != NULL);
- h = GNUNET_DISK_file_open (dc->temp_filename,
- GNUNET_DISK_OPEN_READ,
- GNUNET_DISK_PERM_NONE);
- }
- if (h == NULL)
- return; /* oops */
- data = GNUNET_DISK_file_map (h, &m, GNUNET_DISK_MAP_TYPE_READ, size);
- if (data == NULL)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Directory too large for system address space\n"));
- }
- else
+ uint64_t off;
+ char block[DBLOCK_SIZE];
+ GNUNET_HashCode key;
+ uint64_t total;
+ size_t len;
+ unsigned int i;
+ struct DownloadRequest *drc;
+ uint64_t child_block_size;
+ const struct ContentHashKey *chks;
+ int up_done;
+
+ GNUNET_assert (NULL != dc->rfh);
+ GNUNET_assert (BRS_CHK_SET == dr->state);
+ total = GNUNET_FS_uri_chk_get_file_size (dc->uri);
+ GNUNET_assert (dr->depth < dc->treedepth);
+ len = GNUNET_FS_tree_calculate_block_size (total, dr->offset, dr->depth);
+ GNUNET_assert (len <= DBLOCK_SIZE);
+ off = compute_disk_offset (total, dr->offset, dr->depth);
+ if (dc->old_file_size < off + len)
+ return; /* failure */
+ if (off != GNUNET_DISK_file_seek (dc->rfh, off, GNUNET_DISK_SEEK_SET))
+ {
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "seek", dc->filename);
+ return; /* failure */
+ }
+ if (len != GNUNET_DISK_file_read (dc->rfh, block, len))
+ {
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "read", dc->filename);
+ return; /* failure */
+ }
+ GNUNET_CRYPTO_hash (block, len, &key);
+ if (0 != memcmp (&key, &dr->chk.key, sizeof (GNUNET_HashCode)))
+ return; /* mismatch */
+ if (GNUNET_OK !=
+ encrypt_existing_match (dc, &dr->chk, dr, block, len, GNUNET_NO))
+ {
+ /* hash matches but encrypted block does not, really bad */
+ dr->state = BRS_ERROR;
+ /* propagate up */
+ while (NULL != dr->parent)
{
- GNUNET_FS_directory_list_contents (size,
- data,
- 0,
- &trigger_recursive_download,
- dc);
- GNUNET_DISK_file_unmap (m);
+ dr = dr->parent;
+ dr->state = BRS_ERROR;
}
- GNUNET_DISK_file_close (h);
- if (dc->filename == NULL)
+ return;
+ }
+ /* block matches */
+ dr->state = BRS_DOWNLOAD_DOWN;
+
+ /* set CHKs for children */
+ up_done = GNUNET_YES;
+ chks = (const struct ContentHashKey *) block;
+ for (i = 0; i < dr->num_children; i++)
+ {
+ 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);
+ if (BRS_INIT == drc->state)
{
- if (0 != UNLINK (dc->temp_filename))
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
- "unlink",
- dc->temp_filename);
- GNUNET_free (dc->temp_filename);
- dc->temp_filename = NULL;
+ drc->state = BRS_CHK_SET;
+ drc->chk = chks[drc->chk_idx];
+ try_top_down_reconstruction (dc, drc);
}
+ if (BRS_DOWNLOAD_UP != drc->state)
+ up_done = GNUNET_NO; /* children not all done */
+ }
+ if (GNUNET_YES == up_done)
+ propagate_up (dr); /* children all done (or no children...) */
}
/**
- * Check if all child-downloads have completed and
- * if so, signal completion (and possibly recurse to
- * parent).
+ * Schedule the download of the specified block in the tree.
+ *
+ * @param dc overall download this block belongs to
+ * @param dr request to schedule
*/
static void
-check_completed (struct GNUNET_FS_DownloadContext *dc)
+schedule_block_download (struct GNUNET_FS_DownloadContext *dc,
+ struct DownloadRequest *dr)
{
- struct GNUNET_FS_ProgressInfo pi;
- struct GNUNET_FS_DownloadContext *pos;
+ unsigned int i;
- pos = dc->child_head;
- while (pos != NULL)
- {
- if ( (pos->emsg == NULL) &&
- (pos->completed < pos->length) )
- return; /* not done yet */
- if ( (pos->child_head != NULL) &&
- (pos->has_finished != GNUNET_YES) )
- return; /* not transitively done yet */
- 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);
- if (dc->parent != NULL)
- check_completed (dc->parent);
+ switch (dr->state)
+ {
+ case BRS_INIT:
+ GNUNET_assert (0);
+ break;
+ case BRS_RECONSTRUCT_DOWN:
+ GNUNET_assert (0);
+ break;
+ case BRS_RECONSTRUCT_META_UP:
+ GNUNET_assert (0);
+ break;
+ case BRS_RECONSTRUCT_UP:
+ GNUNET_assert (0);
+ break;
+ case BRS_CHK_SET:
+ /* normal case, start download */
+ break;
+ case BRS_DOWNLOAD_DOWN:
+ for (i = 0; i < dr->num_children; i++)
+ schedule_block_download (dc, dr->children[i]);
+ return;
+ case BRS_DOWNLOAD_UP:
+ /* We're done! */
+ return;
+ case BRS_ERROR:
+ GNUNET_break (0);
+ return;
+ }
+ 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));
+ if (GNUNET_NO !=
+ GNUNET_CONTAINER_multihashmap_contains_value (dc->active, &dr->chk.query,
+ dr))
+ return; /* already active */
+ GNUNET_CONTAINER_multihashmap_put (dc->active, &dr->chk.query, dr,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ if (NULL == dc->client)
+ return; /* download not active */
+ GNUNET_CONTAINER_DLL_insert (dc->pending_head, dc->pending_tail, dr);
+ dr->is_pending = GNUNET_YES;
+ if (NULL == dc->th)
+ dc->th =
+ GNUNET_CLIENT_notify_transmit_ready (dc->client,
+ sizeof (struct SearchMessage),
+ GNUNET_CONSTANTS_SERVICE_TIMEOUT,
+ GNUNET_NO,
+ &transmit_download_request, dc);
}
+#define GNUNET_FS_URI_CHK_PREFIX GNUNET_FS_URI_PREFIX GNUNET_FS_URI_CHK_INFIX
+
/**
* We found an entry in a directory. Check if the respective child
* already exists and if not create the respective child download.
* @param length number of bytes in data
* @param data contents of the file (or NULL if they were not inlined)
*/
-static void
-trigger_recursive_download (void *cls,
- const char *filename,
- const struct GNUNET_FS_Uri *uri,
- const struct GNUNET_CONTAINER_MetaData *meta,
- size_t length,
- const void *data)
+static void
+trigger_recursive_download (void *cls, const char *filename,
+ const struct GNUNET_FS_Uri *uri,
+ const struct GNUNET_CONTAINER_MetaData *meta,
+ size_t length, const void *data)
{
- struct GNUNET_FS_DownloadContext *dc = cls;
+ struct GNUNET_FS_DownloadContext *dc = cls;
struct GNUNET_FS_DownloadContext *cpos;
- struct GNUNET_DISK_FileHandle *fh;
char *temp_name;
- const char *real_name;
char *fn;
char *us;
char *ext;
char *dn;
char *pos;
char *full_name;
+ char *sfn;
if (NULL == uri)
- return; /* entry for the directory itself */
+ return; /* entry for the directory itself */
cpos = dc->child_head;
- while (cpos != NULL)
- {
- if ( (GNUNET_FS_uri_test_equal (uri,
- cpos->uri)) ||
- ( (filename != NULL) &&
- (0 == strcmp (cpos->filename,
- filename)) ) )
- break;
- cpos = cpos->next;
- }
- if (cpos != NULL)
- return; /* already exists */
+ while (NULL != cpos)
+ {
+ if ((GNUNET_FS_uri_test_equal (uri, cpos->uri)) ||
+ ((NULL != filename) && (0 == strcmp (cpos->filename, filename))))
+ break;
+ cpos = cpos->next;
+ }
+ if (NULL != cpos)
+ return; /* already exists */
fn = NULL;
if (NULL == filename)
+ {
+ fn = GNUNET_FS_meta_data_suggest_filename (meta);
+ if (NULL == fn)
{
- fn = GNUNET_FS_meta_data_suggest_filename (meta);
- if (fn == NULL)
- {
- us = GNUNET_FS_uri_to_string (uri);
- fn = GNUNET_strdup (&us [strlen (GNUNET_FS_URI_PREFIX
- GNUNET_FS_URI_CHK_INFIX)]);
- GNUNET_free (us);
- }
- else if (fn[0] == '.')
- {
- ext = fn;
- us = GNUNET_FS_uri_to_string (uri);
- GNUNET_asprintf (&fn,
- "%s%s",
- &us[strlen (GNUNET_FS_URI_PREFIX
- GNUNET_FS_URI_CHK_INFIX)], ext);
- GNUNET_free (ext);
- GNUNET_free (us);
- }
- /* change '\' to '/' (this should have happened
- during insertion, but malicious peers may
- not have done this) */
- while (NULL != (pos = strstr (fn, "\\")))
- *pos = '/';
- /* remove '../' everywhere (again, well-behaved
- peers don't do this, but don't trust that
- we did not get something nasty) */
- while (NULL != (pos = strstr (fn, "../")))
- {
- pos[0] = '_';
- pos[1] = '_';
- pos[2] = '_';
- }
- filename = fn;
+ us = GNUNET_FS_uri_to_string (uri);
+ fn = GNUNET_strdup (&us[strlen (GNUNET_FS_URI_CHK_PREFIX)]);
+ GNUNET_free (us);
+ }
+ else if ('.' == fn[0])
+ {
+ ext = fn;
+ us = GNUNET_FS_uri_to_string (uri);
+ GNUNET_asprintf (&fn, "%s%s", &us[strlen (GNUNET_FS_URI_CHK_PREFIX)],
+ ext);
+ GNUNET_free (ext);
+ GNUNET_free (us);
}
- if (dc->filename == NULL)
+ /* change '\' to '/' (this should have happened
+ * during insertion, but malicious peers may
+ * not have done this) */
+ while (NULL != (pos = strstr (fn, "\\")))
+ *pos = '/';
+ /* remove '../' everywhere (again, well-behaved
+ * peers don't do this, but don't trust that
+ * we did not get something nasty) */
+ while (NULL != (pos = strstr (fn, "../")))
{
- full_name = NULL;
+ pos[0] = '_';
+ pos[1] = '_';
+ pos[2] = '_';
}
+ filename = fn;
+ }
+ if (NULL == dc->filename)
+ {
+ full_name = NULL;
+ }
else
+ {
+ dn = GNUNET_strdup (dc->filename);
+ GNUNET_break ((strlen (dn) >= strlen (GNUNET_FS_DIRECTORY_EXT)) &&
+ (NULL !=
+ strstr (dn + strlen (dn) - strlen (GNUNET_FS_DIRECTORY_EXT),
+ GNUNET_FS_DIRECTORY_EXT)));
+ sfn = GNUNET_strdup (filename);
+ while ((strlen (sfn) > 0) && ('/' == filename[strlen (sfn) - 1]))
+ sfn[strlen (sfn) - 1] = '\0';
+ if ((strlen (dn) >= strlen (GNUNET_FS_DIRECTORY_EXT)) &&
+ (NULL !=
+ strstr (dn + strlen (dn) - strlen (GNUNET_FS_DIRECTORY_EXT),
+ GNUNET_FS_DIRECTORY_EXT)))
+ dn[strlen (dn) - strlen (GNUNET_FS_DIRECTORY_EXT)] = '\0';
+ if ((GNUNET_YES == GNUNET_FS_meta_data_test_for_directory (meta)) &&
+ ((strlen (filename) < strlen (GNUNET_FS_DIRECTORY_EXT)) ||
+ (NULL ==
+ strstr (filename + strlen (filename) -
+ strlen (GNUNET_FS_DIRECTORY_EXT), GNUNET_FS_DIRECTORY_EXT))))
{
- dn = GNUNET_strdup (dc->filename);
- GNUNET_break ( (strlen (dn) >= strlen (GNUNET_FS_DIRECTORY_EXT)) &&
- (NULL !=
- strstr (dn + strlen(dn) - strlen(GNUNET_FS_DIRECTORY_EXT),
- GNUNET_FS_DIRECTORY_EXT)) );
- if ( (strlen (dn) >= strlen (GNUNET_FS_DIRECTORY_EXT)) &&
- (NULL !=
- strstr (dn + strlen(dn) - strlen(GNUNET_FS_DIRECTORY_EXT),
- GNUNET_FS_DIRECTORY_EXT)) )
- dn[strlen(dn) - strlen (GNUNET_FS_DIRECTORY_EXT)] = '\0';
- if ( (GNUNET_YES == GNUNET_FS_meta_data_test_for_directory (meta)) &&
- ( (strlen (filename) < strlen (GNUNET_FS_DIRECTORY_EXT)) ||
- (NULL ==
- strstr (filename + strlen(filename) - strlen(GNUNET_FS_DIRECTORY_EXT),
- GNUNET_FS_DIRECTORY_EXT)) ) )
- {
- GNUNET_asprintf (&full_name,
- "%s%s%s%s",
- dn,
- DIR_SEPARATOR_STR,
- filename,
- GNUNET_FS_DIRECTORY_EXT);
- }
- else
- {
- GNUNET_asprintf (&full_name,
- "%s%s%s",
- dn,
- DIR_SEPARATOR_STR,
- filename);
- }
- GNUNET_free (dn);
+ GNUNET_asprintf (&full_name, "%s%s%s%s", dn, DIR_SEPARATOR_STR, sfn,
+ GNUNET_FS_DIRECTORY_EXT);
}
- if ( (full_name != NULL) &&
- (GNUNET_OK !=
- GNUNET_DISK_directory_create_for_file (full_name)) )
+ else
{
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Failed to create directory for recursive download of `%s'\n"),
- full_name);
- GNUNET_free (full_name);
- GNUNET_free_non_null (fn);
- return;
+ GNUNET_asprintf (&full_name, "%s%s%s", dn, DIR_SEPARATOR_STR, sfn);
}
+ GNUNET_free (sfn);
+ GNUNET_free (dn);
+ }
+ if ((NULL != full_name) &&
+ (GNUNET_OK != GNUNET_DISK_directory_create_for_file (full_name)))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Failed to create directory for recursive download of `%s'\n"),
+ full_name);
+ GNUNET_free (full_name);
+ GNUNET_free_non_null (fn);
+ return;
+ }
temp_name = NULL;
- if ( (data != NULL) &&
- (GNUNET_FS_uri_chk_get_file_size (uri) == length) )
- {
- if (full_name == NULL)
- {
- temp_name = GNUNET_DISK_mktemp ("gnunet-directory-download-tmp");
- real_name = temp_name;
- }
- else
- {
- real_name = full_name;
- }
- /* write to disk, then trigger normal download which will instantly progress to completion */
- fh = GNUNET_DISK_file_open (real_name,
- GNUNET_DISK_OPEN_WRITE | GNUNET_DISK_OPEN_TRUNCATE | GNUNET_DISK_OPEN_CREATE,
- GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE);
- if (fh == NULL)
- {
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
- "open",
- real_name);
- GNUNET_free (full_name);
- GNUNET_free_non_null (fn);
- return;
- }
- if (length !=
- GNUNET_DISK_file_write (fh,
- data,
- length))
- {
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
- "write",
- full_name);
- }
- GNUNET_DISK_file_close (fh);
- }
- 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);
+ 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));
+ 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);
GNUNET_free_non_null (full_name);
GNUNET_free_non_null (temp_name);
GNUNET_free_non_null (fn);
/**
- * Free entries in the map.
+ * (recursively) free download request structure
*
- * @param cls unused (NULL)
- * @param key unused
- * @param entry entry of type "struct DownloadRequest" which is freed
- * @return GNUNET_OK
+ * @param dr request to free
*/
-static int
-free_entry (void *cls,
- const GNUNET_HashCode *key,
- void *entry)
+void
+GNUNET_FS_free_download_request_ (struct DownloadRequest *dr)
{
- GNUNET_free (entry);
- return GNUNET_OK;
+ unsigned int i;
+
+ if (NULL == dr)
+ return;
+ for (i = 0; i < dr->num_children; i++)
+ GNUNET_FS_free_download_request_ (dr->children[i]);
+ GNUNET_free_non_null (dr->children);
+ GNUNET_free (dr);
}
* @return GNUNET_YES (we should continue to iterate); unless serious error
*/
static int
-process_result_with_request (void *cls,
- const GNUNET_HashCode * key,
- void *value)
+process_result_with_request (void *cls, const GNUNET_HashCode * key,
+ void *value)
{
struct ProcessResultClosure *prc = cls;
- struct DownloadRequest *sm = value;
- struct DownloadRequest *ppos;
- struct DownloadRequest *pprev;
- struct GNUNET_DISK_FileHandle *fh;
+ struct DownloadRequest *dr = value;
struct GNUNET_FS_DownloadContext *dc = prc->dc;
+ struct DownloadRequest *drc;
+ struct GNUNET_DISK_FileHandle *fh = NULL;
struct GNUNET_CRYPTO_AesSessionKey skey;
struct GNUNET_CRYPTO_AesInitializationVector iv;
char pt[prc->size];
size_t bs;
size_t app;
int i;
- struct ContentHashKey *chk;
+ struct ContentHashKey *chkarr;
- fh = NULL;
- bs = GNUNET_FS_tree_calculate_block_size (GNUNET_ntohll (dc->uri->data.chk.file_length),
- dc->treedepth,
- sm->offset,
- sm->depth);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "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));
+ bs = GNUNET_FS_tree_calculate_block_size (GNUNET_ntohll
+ (dc->uri->data.chk.file_length),
+ dr->offset, dr->depth);
if (prc->size != bs)
+ {
+ GNUNET_asprintf (&dc->emsg,
+ _
+ ("Internal error or bogus download URI (expected %u bytes at depth %u and offset %llu/%llu, got %u bytes)"),
+ bs, dr->depth, (unsigned long long) dr->offset,
+ (unsigned long long) GNUNET_ntohll (dc->uri->data.
+ chk.file_length),
+ prc->size);
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s\n", dc->emsg);
+ while (NULL != dr->parent)
{
-#if DEBUG_DOWNLOAD
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Internal error or bogus download URI (expected %u bytes, got %u)\n",
- bs,
- prc->size);
-#endif
- dc->emsg = GNUNET_strdup ("Internal error or bogus download URI");
- goto signal_error;
- }
- GNUNET_assert (GNUNET_YES ==
- GNUNET_CONTAINER_multihashmap_remove (dc->active,
- &prc->query,
- sm));
- /* if this request is on the pending list, remove it! */
- pprev = NULL;
- ppos = dc->pending;
- while (ppos != NULL)
- {
- if (ppos == sm)
- {
- if (pprev == NULL)
- dc->pending = ppos->next;
- else
- pprev->next = ppos->next;
- break;
- }
- pprev = ppos;
- ppos = ppos->next;
+ dr->state = BRS_ERROR;
+ dr = dr->parent;
}
- GNUNET_CRYPTO_hash_to_aes_key (&sm->chk.key, &skey, &iv);
- if (-1 == GNUNET_CRYPTO_aes_decrypt (prc->data,
- prc->size,
- &skey,
- &iv,
- pt))
+ dr->state = BRS_ERROR;
+ goto signal_error;
+ }
+
+ (void) GNUNET_CONTAINER_multihashmap_remove (dc->active, &prc->query, dr);
+ if (GNUNET_YES == dr->is_pending)
+ {
+ GNUNET_CONTAINER_DLL_remove (dc->pending_head, dc->pending_tail, dr);
+ 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))
+ {
+ GNUNET_break (0);
+ dc->emsg = GNUNET_strdup (_("internal error decrypting content"));
+ goto signal_error;
+ }
+ off =
+ compute_disk_offset (GNUNET_ntohll (dc->uri->data.chk.file_length),
+ dr->offset, dr->depth);
+ /* save to disk */
+ if ((GNUNET_YES == prc->do_store) &&
+ ((NULL != dc->filename) || (is_recursive_download (dc))) &&
+ ((dr->depth == dc->treedepth) ||
+ (0 == (dc->options & GNUNET_FS_DOWNLOAD_NO_TEMPORARIES))))
+ {
+ fh = GNUNET_DISK_file_open (NULL != dc->filename
+ ? dc->filename : dc->temp_filename,
+ GNUNET_DISK_OPEN_READWRITE |
+ GNUNET_DISK_OPEN_CREATE,
+ GNUNET_DISK_PERM_USER_READ |
+ GNUNET_DISK_PERM_USER_WRITE |
+ GNUNET_DISK_PERM_GROUP_READ |
+ GNUNET_DISK_PERM_OTHER_READ);
+ if (NULL == fh)
{
- GNUNET_break (0);
- dc->emsg = GNUNET_strdup ("internal error decrypting content");
+ GNUNET_asprintf (&dc->emsg,
+ _("Download failed: could not open file `%s': %s"),
+ dc->filename, STRERROR (errno));
goto signal_error;
}
- off = compute_disk_offset (GNUNET_ntohll (dc->uri->data.chk.file_length),
- sm->offset,
- sm->depth,
- dc->treedepth);
- /* save to disk */
- if ( ( GNUNET_YES == prc->do_store) &&
- ( (dc->filename != NULL) ||
- (is_recursive_download (dc)) ) &&
- ( (sm->depth == dc->treedepth) ||
- (0 == (dc->options & GNUNET_FS_DOWNLOAD_NO_TEMPORARIES)) ) )
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Saving decrypted block to disk at offset %llu\n",
+ (unsigned long long) off);
+ if ((off != GNUNET_DISK_file_seek (fh, off, GNUNET_DISK_SEEK_SET)))
{
- fh = GNUNET_DISK_file_open (dc->filename != NULL
- ? dc->filename
- : dc->temp_filename,
- GNUNET_DISK_OPEN_READWRITE |
- GNUNET_DISK_OPEN_CREATE,
- GNUNET_DISK_PERM_USER_READ |
- GNUNET_DISK_PERM_USER_WRITE |
- GNUNET_DISK_PERM_GROUP_READ |
- GNUNET_DISK_PERM_OTHER_READ);
+ GNUNET_asprintf (&dc->emsg,
+ _("Failed to seek to offset %llu in file `%s': %s"),
+ (unsigned long long) off, dc->filename,
+ STRERROR (errno));
+ goto signal_error;
}
- if ( (NULL == fh) &&
- (GNUNET_YES == prc->do_store) &&
- ( (dc->filename != NULL) ||
- (is_recursive_download (dc)) ) &&
- ( (sm->depth == dc->treedepth) ||
- (0 == (dc->options & GNUNET_FS_DOWNLOAD_NO_TEMPORARIES)) ) )
+ if (prc->size != GNUNET_DISK_file_write (fh, pt, prc->size))
{
GNUNET_asprintf (&dc->emsg,
- _("Download failed: could not open file `%s': %s\n"),
- dc->filename,
- STRERROR (errno));
+ _
+ ("Failed to write block of %u bytes at offset %llu in file `%s': %s"),
+ (unsigned int) prc->size, (unsigned long long) off,
+ dc->filename, STRERROR (errno));
goto signal_error;
}
- if (fh != NULL)
+ GNUNET_break (GNUNET_OK == GNUNET_DISK_file_close (fh));
+ fh = NULL;
+ }
+
+ if (0 == dr->depth)
+ {
+ /* DBLOCK, update progress and try recursion if applicable */
+ app = prc->size;
+ if (dr->offset < dc->offset)
{
-#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,
- _("Failed to seek to offset %llu in file `%s': %s\n"),
- (unsigned long long) off,
- dc->filename,
- STRERROR (errno));
- goto signal_error;
- }
- if (prc->size !=
- GNUNET_DISK_file_write (fh,
- pt,
- prc->size))
- {
- GNUNET_asprintf (&dc->emsg,
- _("Failed to write block of %u bytes at offset %llu in file `%s': %s\n"),
- (unsigned int) prc->size,
- (unsigned long long) off,
- dc->filename,
- STRERROR (errno));
- goto signal_error;
- }
- GNUNET_break (GNUNET_OK == GNUNET_DISK_file_close (fh));
- fh = NULL;
+ /* starting offset begins in the middle of pt,
+ * do not count first bytes as progress */
+ GNUNET_assert (app > (dc->offset - dr->offset));
+ app -= (dc->offset - dr->offset);
}
- if (sm->depth == dc->treedepth)
+ if (dr->offset + prc->size > dc->offset + dc->length)
{
- app = prc->size;
- if (sm->offset < dc->offset)
- {
- /* starting offset begins in the middle of pt,
- do not count first bytes as progress */
- GNUNET_assert (app > (dc->offset - sm->offset));
- app -= (dc->offset - sm->offset);
- }
- if (sm->offset + prc->size > dc->offset + dc->length)
- {
- /* end of block is after relevant range,
- do not count last bytes as progress */
- GNUNET_assert (app > (sm->offset + prc->size) - (dc->offset + dc->length));
- app -= (sm->offset + prc->size) - (dc->offset + dc->length);
- }
- dc->completed += app;
-
- /* do recursive download if option is set and either meta data
- says it is a directory or if no meta data is given AND filename
- ends in '.gnd' (top-level case) */
- if (is_recursive_download (dc))
- GNUNET_FS_directory_list_contents (prc->size,
- pt,
- off,
- &trigger_recursive_download,
- dc);
-
+ /* end of block is after relevant range,
+ * do not count last bytes as progress */
+ GNUNET_assert (app >
+ (dr->offset + prc->size) - (dc->offset + dc->length));
+ app -= (dr->offset + prc->size) - (dc->offset + dc->length);
}
+ dc->completed += app;
+
+ /* do recursive download if option is set and either meta data
+ * says it is a directory or if no meta data is given AND filename
+ * ends in '.gnd' (top-level case) */
+ if (is_recursive_download (dc))
+ GNUNET_FS_directory_list_contents (prc->size, pt, off,
+ &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.offset = sm->offset;
+ pi.value.download.specifics.progress.offset = dr->offset;
pi.value.download.specifics.progress.data_len = prc->size;
- pi.value.download.specifics.progress.depth = sm->depth;
+ 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);
+ else
+ 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 (0 == dr->depth)
+ propagate_up (dr);
+
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 (NULL != dc->filename)
{
-#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)
- {
- if (0 != truncate (dc->filename,
- GNUNET_ntohll (dc->uri->data.chk.file_length)))
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
- "truncate",
- dc->filename);
- }
- if (dc->job_queue != NULL)
- {
- GNUNET_FS_dequeue_ (dc->job_queue);
- dc->job_queue = NULL;
- }
- if (is_recursive_download (dc))
- full_recursive_download (dc);
- if (dc->child_head == NULL)
- {
- /* signal completion */
- pi.status = GNUNET_FS_STATUS_DOWNLOAD_COMPLETED;
- GNUNET_FS_download_make_status_ (&pi, dc);
- if (dc->parent != NULL)
- check_completed (dc->parent);
- }
- GNUNET_assert (sm->depth == dc->treedepth);
- }
- if (sm->depth == dc->treedepth)
- {
- GNUNET_FS_download_sync_ (dc);
- GNUNET_free (sm);
- return GNUNET_YES;
+ if (0 !=
+ truncate (dc->filename,
+ GNUNET_ntohll (dc->uri->data.chk.file_length)))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "truncate",
+ dc->filename);
}
-#if DEBUG_DOWNLOAD
+ GNUNET_assert (0 == dr->depth);
+ check_completed (dc);
+ }
+ if (0 == dr->depth)
+ {
+ /* bottom of the tree, no child downloads possible, just sync */
+ GNUNET_FS_download_sync_ (dc);
+ return GNUNET_YES;
+ }
+
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Triggering downloads of children (this block was at depth %u and offset %llu)\n",
- sm->depth,
- (unsigned long long) sm->offset);
-#endif
- GNUNET_assert (0 == (prc->size % sizeof(struct ContentHashKey)));
- chk = (struct ContentHashKey*) pt;
- for (i=(prc->size / sizeof(struct ContentHashKey))-1;i>=0;i--)
+ "Triggering downloads of children (this block was at depth %u and offset %llu)\n",
+ dr->depth, (unsigned long long) dr->offset);
+ GNUNET_assert (0 == (prc->size % sizeof (struct ContentHashKey)));
+ chkarr = (struct ContentHashKey *) pt;
+ for (i = dr->num_children - 1; i >= 0; i--)
+ {
+ drc = dr->children[i];
+ switch (drc->state)
{
- off = compute_dblock_offset (sm->offset,
- sm->depth,
- dc->treedepth,
- i);
- if ( (off + DBLOCK_SIZE >= dc->offset) &&
- (off < dc->offset + dc->length) )
- schedule_block_download (dc,
- &chk[i],
- off,
- sm->depth + 1);
+ case BRS_INIT:
+ if ((drc->chk_idx + 1) * sizeof (struct ContentHashKey) > prc->size)
+ {
+ /* 'chkarr' does not have enough space for this chk_idx;
+ internal error! */
+ GNUNET_break (0);
+ dc->emsg = GNUNET_strdup (_("internal error decoding tree"));
+ goto signal_error;
+ }
+ drc->chk = chkarr[drc->chk_idx];
+ drc->state = BRS_CHK_SET;
+ if (GNUNET_YES == dc->issue_requests)
+ schedule_block_download (dc, drc);
+ break;
+ case BRS_RECONSTRUCT_DOWN:
+ GNUNET_assert (0);
+ break;
+ case BRS_RECONSTRUCT_META_UP:
+ GNUNET_assert (0);
+ break;
+ case BRS_RECONSTRUCT_UP:
+ GNUNET_assert (0);
+ break;
+ case BRS_CHK_SET:
+ GNUNET_assert (0);
+ break;
+ case BRS_DOWNLOAD_DOWN:
+ GNUNET_assert (0);
+ break;
+ case BRS_DOWNLOAD_UP:
+ GNUNET_assert (0);
+ break;
+ case BRS_ERROR:
+ GNUNET_assert (0);
+ break;
+ default:
+ GNUNET_assert (0);
+ break;
}
- GNUNET_free (sm);
+ }
GNUNET_FS_download_sync_ (dc);
return GNUNET_YES;
- signal_error:
- if (fh != NULL)
+signal_error:
+ if (NULL != fh)
GNUNET_DISK_file_close (fh);
pi.status = GNUNET_FS_STATUS_DOWNLOAD_ERROR;
pi.value.download.specifics.error.message = dc->emsg;
GNUNET_FS_download_make_status_ (&pi, dc);
/* abort all pending requests */
if (NULL != dc->th)
- {
- GNUNET_CLIENT_notify_transmit_ready_cancel (dc->th);
- dc->th = NULL;
- }
- GNUNET_CLIENT_disconnect (dc->client, GNUNET_NO);
- GNUNET_CONTAINER_multihashmap_iterate (dc->active,
- &free_entry,
- NULL);
- dc->pending = NULL;
+ {
+ GNUNET_CLIENT_notify_transmit_ready_cancel (dc->th);
+ dc->th = NULL;
+ }
+ GNUNET_CLIENT_disconnect (dc->client);
+ dc->in_receive = GNUNET_NO;
dc->client = NULL;
- GNUNET_free (sm);
+ GNUNET_FS_free_download_request_ (dc->top_request);
+ dc->top_request = NULL;
+ GNUNET_CONTAINER_multihashmap_destroy (dc->active);
+ dc->active = NULL;
+ dc->pending_head = NULL;
+ dc->pending_tail = NULL;
GNUNET_FS_download_sync_ (dc);
return GNUNET_NO;
}
*
* @param dc our download context
* @param type type of the result
+ * @param last_transmission when was this block requested the last time? (FOREVER if unknown/not applicable)
* @param data the (encrypted) response
* @param size size of data
*/
static void
process_result (struct GNUNET_FS_DownloadContext *dc,
- enum GNUNET_BLOCK_Type type,
- const void *data,
- size_t size)
+ enum GNUNET_BLOCK_Type type,
+ struct GNUNET_TIME_Absolute last_transmission,
+ const void *data, size_t size)
{
struct ProcessResultClosure prc;
prc.size = size;
prc.type = type;
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);
+ "Received result for query `%s' from `%s'-service\n",
+ GNUNET_h2s (&prc.query), "FS");
+ GNUNET_CONTAINER_multihashmap_get_multiple (dc->active, &prc.query,
+ &process_result_with_request,
+ &prc);
}
* @param cls closure
* @param msg message received, NULL on timeout or fatal error
*/
-static void
-receive_results (void *cls,
- const struct GNUNET_MessageHeader * msg)
+static void
+receive_results (void *cls, const struct GNUNET_MessageHeader *msg)
{
struct GNUNET_FS_DownloadContext *dc = cls;
- const struct PutMessage *cm;
- uint16_t msize;
-
- if ( (NULL == msg) ||
- (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_FS_PUT) ||
- (sizeof (struct PutMessage) > ntohs(msg->size)) )
- {
- GNUNET_break (msg == NULL);
- try_reconnect (dc);
- return;
- }
- msize = ntohs(msg->size);
- cm = (const struct PutMessage*) msg;
- process_result (dc,
- ntohl (cm->type),
- &cm[1],
- msize - sizeof (struct PutMessage));
- if (dc->client == NULL)
- return; /* fatal error */
+ const struct ClientPutMessage *cm;
+ uint16_t msize;
+
+ if ((NULL == msg) || (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_FS_PUT) ||
+ (sizeof (struct ClientPutMessage) > ntohs (msg->size)))
+ {
+ GNUNET_break (NULL == msg);
+ try_reconnect (dc);
+ return;
+ }
+ msize = ntohs (msg->size);
+ cm = (const struct ClientPutMessage *) msg;
+ process_result (dc, ntohl (cm->type),
+ GNUNET_TIME_absolute_ntoh (cm->last_transmission), &cm[1],
+ msize - sizeof (struct ClientPutMessage));
+ if (NULL == dc->client)
+ return; /* fatal error */
/* continue receiving */
- GNUNET_CLIENT_receive (dc->client,
- &receive_results,
- dc,
- GNUNET_TIME_UNIT_FOREVER_REL);
+ GNUNET_CLIENT_receive (dc->client, &receive_results, dc,
+ GNUNET_TIME_UNIT_FOREVER_REL);
}
-
/**
* We're ready to transmit a search request to the
- * file-sharing service. Do it. If there is
- * more than one request pending, try to send
+ * file-sharing service. Do it. If there is
+ * more than one request pending, try to send
* multiple or request another transmission.
*
* @param cls closure
* @return number of bytes written to buf
*/
static size_t
-transmit_download_request (void *cls,
- size_t size,
- void *buf)
+transmit_download_request (void *cls, size_t size, void *buf)
{
struct GNUNET_FS_DownloadContext *dc = cls;
size_t msize;
struct SearchMessage *sm;
+ struct DownloadRequest *dr;
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;
- }
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmitting download request failed, trying to reconnect\n");
+ try_reconnect (dc);
+ return 0;
+ }
GNUNET_assert (size >= sizeof (struct SearchMessage));
msize = 0;
sm = buf;
- while ( (dc->pending != NULL) &&
- (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 (&dc->pending->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 (0 != (dc->options & GNUNET_FS_DOWNLOAD_OPTION_LOOPBACK_ONLY))
- sm->options = htonl (1);
- else
- sm->options = htonl (0);
- if (dc->pending->depth == dc->treedepth)
- sm->type = htonl (GNUNET_BLOCK_TYPE_FS_DBLOCK);
- else
- sm->type = htonl (GNUNET_BLOCK_TYPE_FS_IBLOCK);
- sm->anonymity_level = htonl (dc->anonymity);
- sm->target = dc->target.hashPubKey;
- sm->query = dc->pending->chk.query;
- dc->pending->is_pending = GNUNET_NO;
- dc->pending = dc->pending->next;
- msize += sizeof (struct SearchMessage);
- sm++;
- }
- if (dc->pending != NULL)
- dc->th = GNUNET_CLIENT_notify_transmit_ready (dc->client,
- sizeof (struct SearchMessage),
- GNUNET_CONSTANTS_SERVICE_TIMEOUT,
- GNUNET_NO,
- &transmit_download_request,
- dc);
+ while ((NULL != (dr = dc->pending_head)) &&
+ (size >= msize + sizeof (struct SearchMessage)))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmitting download request for `%s' to `%s'-service\n",
+ GNUNET_h2s (&dr->chk.query), "FS");
+ memset (sm, 0, sizeof (struct SearchMessage));
+ sm->header.size = htons (sizeof (struct SearchMessage));
+ sm->header.type = htons (GNUNET_MESSAGE_TYPE_FS_START_SEARCH);
+ if (0 != (dc->options & GNUNET_FS_DOWNLOAD_OPTION_LOOPBACK_ONLY))
+ sm->options = htonl (GNUNET_FS_SEARCH_OPTION_LOOPBACK_ONLY);
+ else
+ sm->options = htonl (GNUNET_FS_SEARCH_OPTION_NONE);
+ if (0 == dr->depth)
+ sm->type = htonl (GNUNET_BLOCK_TYPE_FS_DBLOCK);
+ else
+ sm->type = htonl (GNUNET_BLOCK_TYPE_FS_IBLOCK);
+ sm->anonymity_level = htonl (dc->anonymity);
+ sm->target = dc->target.hashPubKey;
+ sm->query = dr->chk.query;
+ GNUNET_CONTAINER_DLL_remove (dc->pending_head, dc->pending_tail, dr);
+ dr->is_pending = GNUNET_NO;
+ msize += sizeof (struct SearchMessage);
+ sm++;
+ }
+ if (NULL != dc->pending_head)
+ {
+ dc->th =
+ GNUNET_CLIENT_notify_transmit_ready (dc->client,
+ sizeof (struct SearchMessage),
+ GNUNET_CONSTANTS_SERVICE_TIMEOUT,
+ GNUNET_NO,
+ &transmit_download_request, dc);
+ GNUNET_assert (NULL != dc->th);
+ }
+ if (GNUNET_NO == dc->in_receive)
+ {
+ dc->in_receive = GNUNET_YES;
+ GNUNET_CLIENT_receive (dc->client, &receive_results, dc,
+ GNUNET_TIME_UNIT_FOREVER_REL);
+ }
return msize;
}
* @param tc unused
*/
static void
-do_reconnect (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+do_reconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_FS_DownloadContext *dc = cls;
struct GNUNET_CLIENT_Connection *client;
-
+
dc->task = GNUNET_SCHEDULER_NO_TASK;
- client = GNUNET_CLIENT_connect (dc->h->sched,
- "fs",
- dc->h->cfg);
+ client = GNUNET_CLIENT_connect ("fs", dc->h->cfg);
if (NULL == client)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "Connecting to `%s'-service failed, will try again.\n",
- "FS");
- try_reconnect (dc);
- return;
- }
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "Connecting to `%s'-service failed, will try again.\n", "FS");
+ try_reconnect (dc);
+ return;
+ }
dc->client = client;
- dc->th = GNUNET_CLIENT_notify_transmit_ready (client,
- sizeof (struct SearchMessage),
- GNUNET_CONSTANTS_SERVICE_TIMEOUT,
- GNUNET_NO,
- &transmit_download_request,
- dc);
- GNUNET_CLIENT_receive (client,
- &receive_results,
- dc,
- GNUNET_TIME_UNIT_FOREVER_REL);
+ if (NULL != dc->pending_head)
+ {
+ dc->th =
+ GNUNET_CLIENT_notify_transmit_ready (client,
+ sizeof (struct SearchMessage),
+ GNUNET_CONSTANTS_SERVICE_TIMEOUT,
+ GNUNET_NO,
+ &transmit_download_request, dc);
+ GNUNET_assert (NULL != dc->th);
+ }
}
/**
- * Add entries that are not yet pending back to the pending list.
+ * Add entries to the pending list.
*
* @param cls our download context
* @param key unused
* @return GNUNET_OK
*/
static int
-retry_entry (void *cls,
- const GNUNET_HashCode *key,
- void *entry)
+retry_entry (void *cls, const GNUNET_HashCode * key, void *entry)
{
struct GNUNET_FS_DownloadContext *dc = cls;
struct DownloadRequest *dr = entry;
- if (! dr->is_pending)
- {
- dr->next = dc->pending;
- dr->is_pending = GNUNET_YES;
- dc->pending = entry;
- }
+ dr->next = NULL;
+ dr->prev = NULL;
+ GNUNET_CONTAINER_DLL_insert (dc->pending_head, dc->pending_tail, dr);
+ dr->is_pending = GNUNET_YES;
return GNUNET_OK;
}
static void
try_reconnect (struct GNUNET_FS_DownloadContext *dc)
{
-
+
if (NULL != dc->client)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Moving all requests back to pending list\n");
+ if (NULL != dc->th)
{
-#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->th = NULL;
- }
- GNUNET_CONTAINER_multihashmap_iterate (dc->active,
- &retry_entry,
- dc);
- GNUNET_CLIENT_disconnect (dc->client, GNUNET_NO);
- dc->client = NULL;
+ GNUNET_CLIENT_notify_transmit_ready_cancel (dc->th);
+ dc->th = NULL;
}
-#if DEBUG_DOWNLOAD
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Will try to reconnect in 1s\n");
-#endif
- dc->task
- = GNUNET_SCHEDULER_add_delayed (dc->h->sched,
- GNUNET_TIME_UNIT_SECONDS,
- &do_reconnect,
- dc);
+ /* full reset of the pending list */
+ dc->pending_head = NULL;
+ dc->pending_tail = NULL;
+ GNUNET_CONTAINER_multihashmap_iterate (dc->active, &retry_entry, dc);
+ GNUNET_CLIENT_disconnect (dc->client);
+ dc->in_receive = GNUNET_NO;
+ dc->client = NULL;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Will try to reconnect in 1s\n");
+ dc->task =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS, &do_reconnect,
+ dc);
}
-
/**
* We're allowed to ask the FS service for our blocks. Start the download.
*
* @param client handle to use for communcation with FS (we must destroy it!)
*/
static void
-activate_fs_download (void *cls,
- struct GNUNET_CLIENT_Connection *client)
+activate_fs_download (void *cls, struct GNUNET_CLIENT_Connection *client)
{
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_log (GNUNET_ERROR_TYPE_DEBUG, "Download activated\n");
GNUNET_assert (NULL != client);
- GNUNET_assert (dc->client == NULL);
- GNUNET_assert (dc->th == NULL);
+ GNUNET_assert (NULL == dc->client);
+ GNUNET_assert (NULL == dc->th);
dc->client = client;
- GNUNET_CLIENT_receive (client,
- &receive_results,
- dc,
- GNUNET_TIME_UNIT_FOREVER_REL);
pi.status = GNUNET_FS_STATUS_DOWNLOAD_ACTIVE;
GNUNET_FS_download_make_status_ (&pi, dc);
- GNUNET_CONTAINER_multihashmap_iterate (dc->active,
- &retry_entry,
- dc);
-#if DEBUG_DOWNLOAD
+ dc->pending_head = NULL;
+ dc->pending_tail = NULL;
+ GNUNET_CONTAINER_multihashmap_iterate (dc->active, &retry_entry, dc);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Asking for transmission to FS service\n");
-#endif
- dc->th = GNUNET_CLIENT_notify_transmit_ready (dc->client,
- sizeof (struct SearchMessage),
- GNUNET_CONSTANTS_SERVICE_TIMEOUT,
- GNUNET_NO,
- &transmit_download_request,
- dc);
- GNUNET_assert (dc->th != NULL);
+ "Asking for transmission to FS service\n");
+ if (NULL != dc->pending_head)
+ {
+ dc->th =
+ GNUNET_CLIENT_notify_transmit_ready (dc->client,
+ sizeof (struct SearchMessage),
+ GNUNET_CONSTANTS_SERVICE_TIMEOUT,
+ GNUNET_NO,
+ &transmit_download_request, dc);
+ GNUNET_assert (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
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Download deactivated\n");
if (NULL != dc->th)
+ {
+ GNUNET_CLIENT_notify_transmit_ready_cancel (dc->th);
+ dc->th = NULL;
+ }
+ if (NULL != dc->client)
+ {
+ GNUNET_CLIENT_disconnect (dc->client);
+ dc->in_receive = GNUNET_NO;
+ dc->client = NULL;
+ }
+ dc->pending_head = NULL;
+ dc->pending_tail = NULL;
+ pi.status = GNUNET_FS_STATUS_DOWNLOAD_INACTIVE;
+ GNUNET_FS_download_make_status_ (&pi, dc);
+}
+
+
+/**
+ * (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
+ * (as in, offset of the first byte of the first DBLOCK
+ * in the subtree rooted in the returned download request tree)
+ * @param file_start_offset desired starting offset for the download
+ * in the original file; requesting tree should not contain
+ * DBLOCKs prior to the file_start_offset
+ * @param desired_length desired number of bytes the user wanted to access
+ * (from file_start_offset). Resulting tree should not contain
+ * DBLOCKs after file_start_offset + file_length.
+ * @return download request tree for the given range of DBLOCKs at
+ * the specified depth
+ */
+static struct DownloadRequest *
+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)
+{
+ struct DownloadRequest *dr;
+ unsigned int i;
+ unsigned int head_skip;
+ uint64_t child_block_size;
+
+ dr = GNUNET_malloc (sizeof (struct DownloadRequest));
+ dr->parent = parent;
+ dr->depth = depth;
+ dr->offset = dr_offset;
+ dr->chk_idx = chk_idx;
+ if (0 == depth)
+ return dr;
+ child_block_size = GNUNET_FS_tree_compute_tree_size (depth - 1);
+
+ /* calculate how many blocks at this level are not interesting
+ * from the start (rounded down), either because of the requested
+ * file offset or because this IBlock is further along */
+ if (dr_offset < file_start_offset)
+ head_skip = file_start_offset / child_block_size;
+ else
+ head_skip = 0;
+
+ /* calculate index of last block at this level that is interesting (rounded up) */
+ 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 - dr_offset)
+ dr->num_children++; /* round up */
+ 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 */
+
+ /* why else would we have gotten here to begin with? (that'd be a bad logic error) */
+ GNUNET_assert (dr->num_children > 0);
+
+ dr->children =
+ GNUNET_malloc (dr->num_children * sizeof (struct DownloadRequest *));
+ for (i = 0; i < dr->num_children; i++)
+ dr->children[i] =
+ create_download_request (dr, i + head_skip, depth - 1,
+ dr_offset + (i + head_skip) * child_block_size,
+ file_start_offset, desired_length);
+ return dr;
+}
+
+
+/**
+ * Continuation after a possible attempt to reconstruct
+ * the current IBlock from the existing file.
+ *
+ * @param cls the 'struct ReconstructContext'
+ * @param tc scheduler context
+ */
+static void
+reconstruct_cont (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_FS_DownloadContext *dc = cls;
+
+ /* clean up state from tree encoder */
+ if (dc->task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (dc->task);
+ dc->task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (NULL != dc->rfh)
+ {
+ GNUNET_break (GNUNET_OK == GNUNET_DISK_file_close (dc->rfh));
+ 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);
+}
+
+
+/**
+ * Task requesting the next block from the tree encoder.
+ *
+ * @param cls the 'struct GNUJNET_FS_DownloadContext' we're processing
+ * @param tc task context
+ */
+static void
+get_next_block (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_FS_DownloadContext *dc = cls;
+
+ dc->task = GNUNET_SCHEDULER_NO_TASK;
+ GNUNET_FS_tree_encoder_next (dc->te);
+}
+
+
+/**
+ * Function called asking for the current (encoded)
+ * block to be processed. After processing the
+ * client should either call "GNUNET_FS_tree_encode_next"
+ * or (on error) "GNUNET_FS_tree_encode_finish".
+ *
+ * This function checks if the content on disk matches
+ * the expected content based on the URI.
+ *
+ * @param cls closure
+ * @param chk content hash key for the block
+ * @param offset offset of the block
+ * @param depth depth of the block, 0 for DBLOCK
+ * @param type type of the block (IBLOCK or DBLOCK)
+ * @param block the (encrypted) block
+ * @param block_size size of block (in bytes)
+ */
+static void
+reconstruct_cb (void *cls, const struct ContentHashKey *chk, uint64_t offset,
+ unsigned int depth, enum GNUNET_BLOCK_Type type,
+ const void *block, uint16_t block_size)
+{
+ struct GNUNET_FS_DownloadContext *dc = cls;
+ struct GNUNET_FS_ProgressInfo pi;
+ struct DownloadRequest *dr;
+ uint64_t blen;
+ unsigned int chld;
+
+ /* find corresponding request entry */
+ dr = dc->top_request;
+ while (dr->depth > depth)
+ {
+ GNUNET_assert (dr->num_children > 0);
+ blen = GNUNET_FS_tree_compute_tree_size (dr->depth - 1);
+ chld = (offset - dr->offset) / blen;
+ if (chld < dr->children[0]->chk_idx)
{
- GNUNET_CLIENT_notify_transmit_ready_cancel (dc->th);
- dc->th = NULL;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Block %u < %u irrelevant for our range\n",
+ chld,
+ dr->children[0]->chk_idx);
+ dc->task = GNUNET_SCHEDULER_add_now (&get_next_block, dc);
+ return; /* irrelevant block */
}
- if (NULL != dc->client)
+ if (chld > dr->children[dr->num_children-1]->chk_idx)
{
- GNUNET_CLIENT_disconnect (dc->client, GNUNET_NO);
- dc->client = NULL;
+ 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 */
}
- pi.status = GNUNET_FS_STATUS_DOWNLOAD_INACTIVE;
- GNUNET_FS_download_make_status_ (&pi, dc);
+ 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:
+ break;
+ case BRS_RECONSTRUCT_DOWN:
+ break;
+ case BRS_RECONSTRUCT_META_UP:
+ break;
+ case BRS_RECONSTRUCT_UP:
+ break;
+ 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);
+ /* how many of those bytes are in the requested range? */
+ blen = GNUNET_MIN (blen, dc->length + dc->offset - dr->offset);
+ /* signal progress */
+ dc->completed += blen;
+ pi.status = GNUNET_FS_STATUS_DOWNLOAD_PROGRESS;
+ pi.value.download.specifics.progress.data = NULL;
+ pi.value.download.specifics.progress.offset = offset;
+ 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 (NULL != dc->filename)
+ {
+ 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;
+ case BRS_DOWNLOAD_UP:
+ break;
+ case BRS_ERROR:
+ break;
+ default:
+ 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);
+}
+
+
+/**
+ * Function called by the tree encoder to obtain a block of plaintext
+ * data (for the lowest level of the tree).
+ *
+ * @param cls our 'struct ReconstructContext'
+ * @param offset identifies which block to get
+ * @param max (maximum) number of bytes to get; returning
+ * fewer will also cause errors
+ * @param buf where to copy the plaintext buffer
+ * @param emsg location to store an error message (on error)
+ * @return number of bytes copied to buf, 0 on error
+ */
+static size_t
+fh_reader (void *cls, uint64_t offset, size_t max, void *buf, char **emsg)
+{
+ struct GNUNET_FS_DownloadContext *dc = cls;
+ struct GNUNET_DISK_FileHandle *fh = dc->rfh;
+ ssize_t ret;
+
+ if (NULL != emsg)
+ *emsg = NULL;
+ if (offset != GNUNET_DISK_file_seek (fh, offset, GNUNET_DISK_SEEK_SET))
+ {
+ if (NULL != emsg)
+ *emsg = GNUNET_strdup (strerror (errno));
+ return 0;
+ }
+ ret = GNUNET_DISK_file_read (fh, buf, max);
+ if (ret < 0)
+ {
+ if (NULL != emsg)
+ *emsg = GNUNET_strdup (strerror (errno));
+ return 0;
+ }
+ return ret;
+}
+
+
+/**
+ * Task that creates the initial (top-level) download
+ * request for the file.
+ *
+ * @param cls the 'struct GNUNET_FS_DownloadContext'
+ * @param tc scheduler context
+ */
+void
+GNUNET_FS_download_start_task_ (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_FS_DownloadContext *dc = cls;
+ struct GNUNET_FS_ProgressInfo pi;
+ struct GNUNET_DISK_FileHandle *fh;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Start task running...\n");
+ dc->task = GNUNET_SCHEDULER_NO_TASK;
+ if (0 == dc->length)
+ {
+ /* no bytes required! */
+ if (NULL != dc->filename)
+ {
+ fh = GNUNET_DISK_file_open (dc->filename,
+ GNUNET_DISK_OPEN_READWRITE |
+ GNUNET_DISK_OPEN_CREATE |
+ ((0 ==
+ GNUNET_FS_uri_chk_get_file_size (dc->uri)) ?
+ GNUNET_DISK_OPEN_TRUNCATE : 0),
+ GNUNET_DISK_PERM_USER_READ |
+ GNUNET_DISK_PERM_USER_WRITE |
+ GNUNET_DISK_PERM_GROUP_READ |
+ GNUNET_DISK_PERM_OTHER_READ);
+ 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 (NULL != dc->emsg)
+ return;
+ if (NULL == dc->top_request)
+ {
+ dc->top_request =
+ create_download_request (NULL, 0, dc->treedepth - 1, 0, dc->offset,
+ dc->length);
+ dc->top_request->state = BRS_CHK_SET;
+ dc->top_request->chk =
+ (dc->uri->type ==
+ 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);
+ }
+ GNUNET_FS_download_start_downloading_ (dc);
+ /* attempt reconstruction from disk */
+ if (GNUNET_YES == GNUNET_DISK_file_test (dc->filename))
+ dc->rfh =
+ GNUNET_DISK_file_open (dc->filename, GNUNET_DISK_OPEN_READ,
+ GNUNET_DISK_PERM_NONE);
+ if (dc->top_request->state == BRS_CHK_SET)
+ {
+ if (NULL != dc->rfh)
+ {
+ /* first, try top-down */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Trying top-down reconstruction for `%s'\n", dc->filename);
+ try_top_down_reconstruction (dc, dc->top_request);
+ switch (dc->top_request->state)
+ {
+ case BRS_CHK_SET:
+ break; /* normal */
+ case BRS_DOWNLOAD_DOWN:
+ break; /* normal, some blocks already down */
+ case BRS_DOWNLOAD_UP:
+ /* already done entirely, party! */
+ if (NULL != dc->rfh)
+ {
+ /* avoid hanging on to file handle longer than
+ * necessary */
+ GNUNET_DISK_file_close (dc->rfh);
+ dc->rfh = NULL;
+ }
+ return;
+ case BRS_ERROR:
+ GNUNET_asprintf (&dc->emsg, _("Invalid URI"));
+ GNUNET_FS_download_sync_ (dc);
+ pi.status = GNUNET_FS_STATUS_DOWNLOAD_ERROR;
+ pi.value.download.specifics.error.message = dc->emsg;
+ GNUNET_FS_download_make_status_ (&pi, dc);
+ return;
+ default:
+ GNUNET_assert (0);
+ break;
+ }
+ }
+ }
+ /* attempt reconstruction from meta data */
+ if ((GNUNET_FS_uri_chk_get_file_size (dc->uri) <= MAX_INLINE_SIZE) &&
+ (NULL != dc->meta))
+ {
+ 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));
+ GNUNET_CONTAINER_meta_data_iterate (dc->meta, &match_full_data, dc);
+ if (BRS_DOWNLOAD_UP == dc->top_request->state)
+ {
+ if (NULL != dc->rfh)
+ {
+ /* avoid hanging on to file handle longer than
+ * necessary */
+ GNUNET_DISK_file_close (dc->rfh);
+ dc->rfh = NULL;
+ }
+ return; /* finished, status update was already done for us */
+ }
+ }
+ if (NULL != dc->rfh)
+ {
+ /* finally, actually run bottom-up */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Trying bottom-up reconstruction of file `%s'\n", dc->filename);
+ dc->te =
+ 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 (BRS_DOWNLOAD_UP == dc->top_request->state)
+ check_completed (dc);
}
{
struct GNUNET_FS_DownloadContext *dc = cls;
struct GNUNET_FS_ProgressInfo pi;
-
- if (dc->top != NULL)
+
+ if (NULL != dc->top)
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);
+ GNUNET_FS_download_signal_suspend_ (dc->child_head);
+ if (NULL != dc->search)
+ {
+ dc->search->download = NULL;
+ dc->search = NULL;
+ }
+ if (NULL != dc->job_queue)
+ {
+ GNUNET_FS_dequeue_ (dc->job_queue);
+ dc->job_queue = NULL;
+ }
+ if (NULL != dc->parent)
+ GNUNET_CONTAINER_DLL_remove (dc->parent->child_head, dc->parent->child_tail,
+ dc);
+ if (GNUNET_SCHEDULER_NO_TASK != dc->task)
+ {
+ GNUNET_SCHEDULER_cancel (dc->task);
+ dc->task = GNUNET_SCHEDULER_NO_TASK;
+ }
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);
+ if (NULL != dc->te)
+ {
+ GNUNET_FS_tree_encoder_finish (dc->te, NULL, NULL);
+ dc->te = NULL;
+ }
+ if (NULL != dc->rfh)
+ {
+ GNUNET_DISK_file_close (dc->rfh);
+ dc->rfh = NULL;
+ }
+ GNUNET_FS_free_download_request_ (dc->top_request);
+ if (NULL != dc->active)
+ {
+ GNUNET_CONTAINER_multihashmap_destroy (dc->active);
+ dc->active = NULL;
+ }
GNUNET_free_non_null (dc->filename);
GNUNET_CONTAINER_meta_data_destroy (dc->meta);
GNUNET_FS_uri_destroy (dc->uri);
}
+/**
+ * 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 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
+ * @return context that can be used to control this download
+ */
+struct GNUNET_FS_DownloadContext *
+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;
+ }
+ dc = GNUNET_malloc (sizeof (struct GNUNET_FS_DownloadContext));
+ dc->h = h;
+ dc->uri = GNUNET_FS_uri_dup (uri);
+ dc->meta = GNUNET_CONTAINER_meta_data_duplicate (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_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_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_FS_uri_chk_get_file_size (dc->uri));
+ if ((NULL == filename) && (is_recursive_download (dc)))
+ {
+ if (NULL != tempname)
+ dc->temp_filename = GNUNET_strdup (tempname);
+ else
+ dc->temp_filename = GNUNET_DISK_mktemp ("gnunet-directory-download-tmp");
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Starting download `%s' of %llu bytes with tree depth %u\n",
+ filename,
+ (unsigned long long) length,
+ dc->treedepth);
+ 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
*/
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)
+ 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_ProgressInfo pi;
struct GNUNET_FS_DownloadContext *dc;
- GNUNET_assert (GNUNET_FS_uri_test_chk (uri));
- if ( (offset + length < offset) ||
- (offset + length > 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 = create_download_context (h, uri, meta, filename, tempname,
+ offset, length, anonymity, options, cctx);
+ if (NULL == dc)
+ return NULL;
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->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
- 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);
- 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);
+ 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);
return dc;
}
*/
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_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 == NULL) ||
- (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;
+ if ((NULL == sr) || (NULL != sr->download))
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ dc = create_download_context (h, sr->uri, sr->meta, filename, tempname,
+ offset, length, anonymity, options, cctx);
+ if (NULL == dc)
+ return NULL;
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;
+ if (NULL != sr->probe_ctx)
+ {
+ GNUNET_FS_download_stop (sr->probe_ctx, GNUNET_YES);
+ sr->probe_ctx = NULL;
+ }
+ return dc;
}
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,
- dc,
- (dc->length + DBLOCK_SIZE-1) / DBLOCK_SIZE);
+ if (dc->completed == dc->length)
+ return;
+ GNUNET_assert (NULL == dc->job_queue);
+ dc->job_queue =
+ GNUNET_FS_queue_ (dc->h, &activate_fs_download, &deactivate_fs_download,
+ 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);
}
* @param do_delete delete files of incomplete downloads
*/
void
-GNUNET_FS_download_stop (struct GNUNET_FS_DownloadContext *dc,
- int do_delete)
+GNUNET_FS_download_stop (struct GNUNET_FS_DownloadContext *dc, int do_delete)
{
struct GNUNET_FS_ProgressInfo pi;
int have_children;
+ int search_was_null;
- if (dc->top != NULL)
+ if (NULL != dc->top)
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;
- }
+ if (GNUNET_SCHEDULER_NO_TASK != dc->task)
+ {
+ GNUNET_SCHEDULER_cancel (dc->task);
+ dc->task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ search_was_null = (NULL == dc->search);
+ if (NULL != dc->search)
+ {
+ dc->search->download = NULL;
+ GNUNET_FS_search_result_sync_ (dc->search);
+ dc->search = NULL;
+ }
+ if (NULL != dc->job_queue)
+ {
+ GNUNET_FS_dequeue_ (dc->job_queue);
+ dc->job_queue = NULL;
+ }
+ if (NULL != dc->te)
+ {
+ GNUNET_FS_tree_encoder_finish (dc->te, NULL, NULL);
+ dc->te = 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);
- if (dc->parent != NULL)
- GNUNET_CONTAINER_DLL_remove (dc->parent->child_head,
- dc->parent->child_tail,
- dc);
- if (dc->serialization != NULL)
+ GNUNET_FS_download_stop (dc->child_head, do_delete);
+ if (NULL != dc->parent)
+ GNUNET_CONTAINER_DLL_remove (dc->parent->child_head, dc->parent->child_tail,
+ dc);
+ if (NULL != dc->serialization)
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);
+ ((NULL != dc->parent) ||
+ (! search_was_null)) ? GNUNET_FS_SYNC_PATH_CHILD_DOWNLOAD :
+ GNUNET_FS_SYNC_PATH_MASTER_DOWNLOAD,
+ dc->serialization);
+ if ((GNUNET_YES == have_children) && (NULL == dc->parent))
+ GNUNET_FS_remove_sync_dir_ (dc->h,
+ (! search_was_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)
- GNUNET_SCHEDULER_cancel (dc->h->sched,
- dc->task);
- GNUNET_CONTAINER_multihashmap_iterate (dc->active,
- &free_entry,
- NULL);
- GNUNET_CONTAINER_multihashmap_destroy (dc->active);
- if (dc->filename != NULL)
+ GNUNET_FS_free_download_request_ (dc->top_request);
+ dc->top_request = NULL;
+ if (NULL != dc->active)
+ {
+ GNUNET_CONTAINER_multihashmap_destroy (dc->active);
+ dc->active = NULL;
+ }
+ if (NULL != dc->filename)
+ {
+ if ((dc->completed != dc->length) && (GNUNET_YES == do_delete))
{
- if ( (dc->completed != dc->length) &&
- (GNUNET_YES == do_delete) )
- {
- if (0 != UNLINK (dc->filename))
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
- "unlink",
- dc->filename);
- }
- GNUNET_free (dc->filename);
+ if (0 != UNLINK (dc->filename))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink",
+ dc->filename);
}
+ GNUNET_free (dc->filename);
+ }
GNUNET_CONTAINER_meta_data_destroy (dc->meta);
GNUNET_FS_uri_destroy (dc->uri);
if (NULL != dc->temp_filename)
- {
- if (0 != UNLINK (dc->temp_filename))
- GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
- "unlink",
- dc->temp_filename);
- GNUNET_free (dc->temp_filename);
- }
+ {
+ if (0 != UNLINK (dc->temp_filename))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "unlink",
+ dc->temp_filename);
+ GNUNET_free (dc->temp_filename);
+ }
GNUNET_free_non_null (dc->serialization);
GNUNET_free (dc);
}
projects / oweals / gnunet.git / blobdiff