GNUnet  0.11.x
fs_download.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2001-2012 GNUnet e.V.
4 
5  GNUnet is free software: you can redistribute it and/or modify it
6  under the terms of the GNU Affero General Public License as published
7  by the Free Software Foundation, either version 3 of the License,
8  or (at your option) any later version.
9 
10  GNUnet is distributed in the hope that it will be useful, but
11  WITHOUT ANY WARRANTY; without even the implied warranty of
12  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  Affero General Public License for more details.
14 
15  You should have received a copy of the GNU Affero General Public License
16  along with this program. If not, see <http://www.gnu.org/licenses/>.
17 
18  SPDX-License-Identifier: AGPL3.0-or-later
19  */
25 #include "platform.h"
26 #include "gnunet_constants.h"
27 #include "gnunet_fs_service.h"
28 #include "fs_api.h"
29 #include "fs_tree.h"
30 
31 
36 static int
38 {
39  return (0 != (dc->options & GNUNET_FS_DOWNLOAD_OPTION_RECURSIVE)) &&
41  ((NULL == dc->meta) &&
42  ((NULL == dc->filename) ||
43  ((strlen (dc->filename) >= strlen (GNUNET_FS_DIRECTORY_EXT)) &&
44  (NULL != strstr (dc->filename + strlen (dc->filename)
45  - strlen (GNUNET_FS_DIRECTORY_EXT),
47 }
48 
49 
66 static uint64_t
67 compute_disk_offset (uint64_t fsize, uint64_t off, unsigned int depth)
68 {
69  unsigned int i;
70  uint64_t lsize; /* what is the size of all IBlocks for depth "i"? */
71  uint64_t loff; /* where do IBlocks for depth "i" start? */
72  unsigned int ioff; /* which IBlock corresponds to "off" at depth "i"? */
73 
74  if (0 == depth)
75  return off;
76  /* first IBlocks start at the end of file, rounded up
77  * to full DBLOCK_SIZE */
78  loff = ((fsize + DBLOCK_SIZE - 1) / DBLOCK_SIZE) * DBLOCK_SIZE;
79  lsize =
80  ((fsize + DBLOCK_SIZE - 1) / DBLOCK_SIZE) * sizeof(struct ContentHashKey);
81  GNUNET_assert (0 == (off % DBLOCK_SIZE));
82  ioff = (off / DBLOCK_SIZE);
83  for (i = 1; i < depth; i++)
84  {
85  loff += lsize;
86  lsize = (lsize + CHK_PER_INODE - 1) / CHK_PER_INODE;
87  GNUNET_assert (lsize > 0);
88  GNUNET_assert (0 == (ioff % CHK_PER_INODE));
89  ioff /= CHK_PER_INODE;
90  }
91  return loff + ioff * sizeof(struct ContentHashKey);
92 }
93 
94 
102 void
105 {
106  pi->value.download.dc = dc;
107  pi->value.download.cctx = dc->client_info;
108  pi->value.download.pctx =
109  (NULL == dc->parent) ? NULL : dc->parent->client_info;
110  pi->value.download.sctx =
111  (NULL == dc->search) ? NULL : dc->search->client_info;
112  pi->value.download.uri = dc->uri;
113  pi->value.download.filename = dc->filename;
114  pi->value.download.size = dc->length;
115  /* FIXME: Fix duration calculation to account for pauses */
116  pi->value.download.duration =
118  pi->value.download.completed = dc->completed;
119  pi->value.download.anonymity = dc->anonymity;
120  pi->value.download.eta =
122  pi->value.download.is_active = (NULL == dc->mq) ? GNUNET_NO : GNUNET_YES;
123  pi->fsh = dc->h;
124  if (0 == (dc->options & GNUNET_FS_DOWNLOAD_IS_PROBE))
125  dc->client_info = dc->h->upcb (dc->h->upcb_cls, pi);
126  else
128 }
129 
130 
135 {
139  struct GNUNET_HashCode query;
140 
144  const void *data;
145 
150 
155 
159  size_t size;
160 
164  enum GNUNET_BLOCK_Type type;
165 
169  int do_store;
170 
174  uint32_t respect_offered;
175 
180 };
181 
182 
192 static int
193 process_result_with_request (void *cls,
194  const struct GNUNET_HashCode *key,
195  void *value);
196 
197 
211 static int
213  const struct ContentHashKey *chk,
214  struct DownloadRequest *dr,
215  const char *block,
216  size_t len,
217  int do_store)
218 {
219  struct ProcessResultClosure prc;
220  char enc[len];
223  struct GNUNET_HashCode query;
224 
225  GNUNET_CRYPTO_hash_to_aes_key (&chk->key, &sk, &iv);
226  if (-1 == GNUNET_CRYPTO_symmetric_encrypt (block, len, &sk, &iv, enc))
227  {
228  GNUNET_break (0);
229  return GNUNET_SYSERR;
230  }
231  GNUNET_CRYPTO_hash (enc, len, &query);
232  if (0 != memcmp (&query, &chk->query, sizeof(struct GNUNET_HashCode)))
233  {
234  GNUNET_break_op (0);
235  return GNUNET_SYSERR;
236  }
237  GNUNET_log (
239  "Matching %u byte block for `%s' at offset %llu already present, no need for download!\n",
240  (unsigned int) len,
241  dc->filename,
242  (unsigned long long) dr->offset);
243  /* already got it! */
244  prc.dc = dc;
245  prc.data = enc;
246  prc.size = len;
247  prc.type = (0 == dr->depth) ? GNUNET_BLOCK_TYPE_FS_DBLOCK
249  prc.query = chk->query;
250  prc.do_store = do_store;
252  process_result_with_request (&prc, &chk->key, dr);
253  return GNUNET_OK;
254 }
255 
256 
264 static void
266 
267 
279 static void
280 trigger_recursive_download (void *cls,
281  const char *filename,
282  const struct GNUNET_FS_Uri *uri,
283  const struct GNUNET_CONTAINER_MetaData *meta,
284  size_t length,
285  const void *data);
286 
287 
294 static void
296 {
297  size_t size;
298  uint64_t size64;
299  void *data;
300  struct GNUNET_DISK_FileHandle *h;
301  struct GNUNET_DISK_MapHandle *m;
302 
304  size = (size_t) size64;
305  if (size64 != (uint64_t) size)
306  {
307  GNUNET_log (
309  _ (
310  "Recursive downloads of directories larger than 4 GB are not supported on 32-bit systems\n"));
311  return;
312  }
313  if (NULL != dc->filename)
314  {
318  }
319  else
320  {
321  GNUNET_assert (NULL != dc->temp_filename);
325  }
326  if (NULL == h)
327  return; /* oops */
329  if (NULL == data)
330  {
332  _ ("Directory too large for system address space\n"));
333  }
334  else
335  {
336  if (GNUNET_OK !=
338  data,
339  0,
341  dc))
342  {
343  GNUNET_log (
345  _ (
346  "Failed to access full directory contents of `%s' for recursive download\n"),
347  dc->filename);
348  }
350  }
352  if (NULL == dc->filename)
353  {
354  if (0 != unlink (dc->temp_filename))
356  "unlink",
357  dc->temp_filename);
359  dc->temp_filename = NULL;
360  }
361 }
362 
363 
374 static void
376 {
377  struct GNUNET_FS_ProgressInfo pi;
378  struct GNUNET_FS_DownloadContext *pos;
379 
380  /* first, check if we need to download children */
383  /* then, check if children are done already */
384  for (pos = dc->child_head; NULL != pos; pos = pos->next)
385  {
386  if ((NULL == pos->emsg) && (pos->completed < pos->length))
387  return; /* not done yet */
388  if ((NULL != pos->child_head) && (pos->has_finished != GNUNET_YES))
389  return; /* not transitively done yet */
390  }
391  /* All of our children are done, so mark this download done */
393  if (NULL != dc->job_queue)
394  {
396  dc->job_queue = NULL;
397  }
398  if (NULL != dc->task)
399  {
401  dc->task = NULL;
402  }
403  if (NULL != dc->rfh)
404  {
406  dc->rfh = NULL;
407  }
409 
410  /* signal completion */
413 
414  /* let parent know */
415  if (NULL != dc->parent)
417 }
418 
419 
430 static void
432  struct DownloadRequest *dr,
433  const char *data,
434  size_t data_len)
435 {
436  struct GNUNET_FS_ProgressInfo pi;
437  unsigned int i;
438  char enc[DBLOCK_SIZE];
439  struct ContentHashKey chks[CHK_PER_INODE];
440  struct ContentHashKey in_chk;
443  size_t dlen;
444  struct DownloadRequest *drc;
445  struct GNUNET_DISK_FileHandle *fh;
446  int complete;
447  const char *fn;
448  const char *odata;
449  size_t odata_len;
450 
451  odata = data;
452  odata_len = data_len;
453  if (BRS_DOWNLOAD_UP == dr->state)
454  return;
455  if (dr->depth > 0)
456  {
457  if ((dc->offset > 0) ||
459  {
460  /* NOTE: this test is not tight, but should suffice; the issue
461  here is that 'dr->num_children' may inherently only specify a
462  smaller range than what is in the original file;
463  thus, reconstruction of (some) inner blocks will fail.
464  FIXME: we might eventually want to write a tighter test to
465  maximize the circumstances under which we do succeed with
466  IBlock reconstruction. (need good tests though). */return;
467  }
468  complete = GNUNET_YES;
469  for (i = 0; i < dr->num_children; i++)
470  {
471  drc = dr->children[i];
472  try_match_block (dc, drc, data, data_len);
473  if (drc->state != BRS_RECONSTRUCT_META_UP)
474  complete = GNUNET_NO;
475  else
476  chks[i] = drc->chk;
477  }
478  if (GNUNET_YES != complete)
479  return;
480  data = (const char *) chks;
481  dlen = dr->num_children * sizeof(struct ContentHashKey);
482  }
483  else
484  {
485  if (dr->offset > data_len)
486  return; /* oops */
487  dlen = GNUNET_MIN (data_len - dr->offset, DBLOCK_SIZE);
488  }
489  GNUNET_CRYPTO_hash (&data[dr->offset], dlen, &in_chk.key);
490  GNUNET_CRYPTO_hash_to_aes_key (&in_chk.key, &sk, &iv);
491  if (-1 ==
492  GNUNET_CRYPTO_symmetric_encrypt (&data[dr->offset], dlen, &sk, &iv, enc))
493  {
494  GNUNET_break (0);
495  return;
496  }
497  GNUNET_CRYPTO_hash (enc, dlen, &in_chk.query);
498  switch (dr->state)
499  {
500  case BRS_INIT:
501  dr->chk = in_chk;
503  break;
504 
505  case BRS_CHK_SET:
506  if (0 != memcmp (&in_chk, &dr->chk, sizeof(struct ContentHashKey)))
507  {
508  /* other peer provided bogus meta data */
509  GNUNET_break_op (0);
510  break;
511  }
512  /* write block to disk */
513  fn = (NULL != dc->filename) ? dc->filename : dc->temp_filename;
514  if (NULL != fn)
515  {
524  if (NULL == fh)
525  {
528  _ ("Failed to open file `%s' for writing"),
529  fn);
531  dr->state = BRS_ERROR;
533  pi.value.download.specifics.error.message = dc->emsg;
535  return;
536  }
537  if (data_len != GNUNET_DISK_file_write (fh, odata, odata_len))
538  {
541  _ ("Failed to open file `%s' for writing"),
542  fn);
544  dr->state = BRS_ERROR;
546  pi.value.download.specifics.error.message = dc->emsg;
548  return;
549  }
551  }
552  /* signal success */
553  dr->state = BRS_DOWNLOAD_UP;
554  dc->completed = dc->length;
557  pi.value.download.specifics.progress.data = data;
558  pi.value.download.specifics.progress.offset = 0;
559  pi.value.download.specifics.progress.data_len = dlen;
560  pi.value.download.specifics.progress.depth = 0;
561  pi.value.download.specifics.progress.respect_offered = 0;
562  pi.value.download.specifics.progress.block_download_duration =
565  if ((NULL != dc->filename) &&
566  (0 != truncate (dc->filename,
569  "truncate",
570  dc->filename);
572  break;
573 
574  default:
575  /* how did we get here? */
576  GNUNET_break (0);
577  break;
578  }
579 }
580 
581 
600 static int
601 match_full_data (void *cls,
602  const char *plugin_name,
604  enum EXTRACTOR_MetaFormat format,
605  const char *data_mime_type,
606  const char *data,
607  size_t data_len)
608 {
609  struct GNUNET_FS_DownloadContext *dc = cls;
610 
612  return 0;
614  "Found %u bytes of FD!\n",
615  (unsigned int) data_len);
616  if (GNUNET_FS_uri_chk_get_file_size (dc->uri) != data_len)
617  {
618  GNUNET_break_op (0);
619  return 1; /* bogus meta data */
620  }
621  try_match_block (dc, dc->top_request, data, data_len);
622  return 1;
623 }
624 
625 
632 static void
634 {
635  unsigned int i;
636 
637  do
638  {
639  dr->state = BRS_DOWNLOAD_UP;
640  dr = dr->parent;
641  if (NULL == dr)
642  break;
643  for (i = 0; i < dr->num_children; i++)
644  if (dr->children[i]->state != BRS_DOWNLOAD_UP)
645  break;
646  }
647  while (i == dr->num_children);
648 }
649 
650 
661 static void
663  struct DownloadRequest *dr)
664 {
665  uint64_t off;
666  char block[DBLOCK_SIZE];
667  struct GNUNET_HashCode key;
668  uint64_t total;
669  size_t len;
670  unsigned int i;
671  struct DownloadRequest *drc;
672  uint64_t child_block_size;
673  const struct ContentHashKey *chks;
674  int up_done;
675 
676  GNUNET_assert (NULL != dc->rfh);
679  GNUNET_assert (dr->depth < dc->treedepth);
682  off = compute_disk_offset (total, dr->offset, dr->depth);
683  if (dc->old_file_size < off + len)
684  return; /* failure */
685  if (off != GNUNET_DISK_file_seek (dc->rfh, off, GNUNET_DISK_SEEK_SET))
686  {
688  return; /* failure */
689  }
690  if (len != GNUNET_DISK_file_read (dc->rfh, block, len))
691  {
693  return; /* failure */
694  }
695  GNUNET_CRYPTO_hash (block, len, &key);
696  if (0 != memcmp (&key, &dr->chk.key, sizeof(struct GNUNET_HashCode)))
697  return; /* mismatch */
698  if (GNUNET_OK !=
699  encrypt_existing_match (dc, &dr->chk, dr, block, len, GNUNET_NO))
700  {
701  /* hash matches but encrypted block does not, really bad */
702  dr->state = BRS_ERROR;
703  /* propagate up */
704  while (NULL != dr->parent)
705  {
706  dr = dr->parent;
707  dr->state = BRS_ERROR;
708  }
709  return;
710  }
711  /* block matches */
712  dr->state = BRS_DOWNLOAD_DOWN;
713 
714  /* set CHKs for children */
715  up_done = GNUNET_YES;
716  chks = (const struct ContentHashKey *) block;
717  for (i = 0; i < dr->num_children; i++)
718  {
719  drc = dr->children[i];
720  GNUNET_assert (drc->offset >= dr->offset);
721  child_block_size = GNUNET_FS_tree_compute_tree_size (drc->depth);
722  GNUNET_assert (0 == (drc->offset - dr->offset) % child_block_size);
723  if (BRS_INIT == drc->state)
724  {
725  drc->state = BRS_CHK_SET;
726  drc->chk = chks[drc->chk_idx];
728  }
729  if (BRS_DOWNLOAD_UP != drc->state)
730  up_done = GNUNET_NO; /* children not all done */
731  }
732  if (GNUNET_YES == up_done)
733  propagate_up (dr); /* children all done (or no children...) */
734 }
735 
736 
745 static int
746 retry_entry (void *cls, const struct GNUNET_HashCode *key, void *entry)
747 {
748  struct GNUNET_FS_DownloadContext *dc = cls;
749  struct DownloadRequest *dr = entry;
750  struct SearchMessage *sm;
751  struct GNUNET_MQ_Envelope *env;
752 
756  else
758  if (0 == dr->depth)
759  sm->type = htonl (GNUNET_BLOCK_TYPE_FS_DBLOCK);
760  else
761  sm->type = htonl (GNUNET_BLOCK_TYPE_FS_IBLOCK);
762  sm->anonymity_level = htonl (dc->anonymity);
763  sm->target = dc->target;
764  sm->query = dr->chk.query;
765  GNUNET_MQ_send (dc->mq, env);
766  return GNUNET_OK;
767 }
768 
769 
776 static void
778  struct DownloadRequest *dr)
779 {
780  unsigned int i;
781 
782  switch (dr->state)
783  {
784  case BRS_INIT:
785  GNUNET_assert (0);
786  break;
787 
789  GNUNET_assert (0);
790  break;
791 
793  GNUNET_assert (0);
794  break;
795 
796  case BRS_RECONSTRUCT_UP:
797  GNUNET_assert (0);
798  break;
799 
800  case BRS_CHK_SET:
801  /* normal case, start download */
802  break;
803 
804  case BRS_DOWNLOAD_DOWN:
805  for (i = 0; i < dr->num_children; i++)
807  return;
808 
809  case BRS_DOWNLOAD_UP:
810  /* We're done! */
811  return;
812 
813  case BRS_ERROR:
814  GNUNET_break (0);
815  return;
816  }
818  "Scheduling download at offset %llu and depth %u for `%s'\n",
819  (unsigned long long) dr->offset,
820  dr->depth,
821  GNUNET_h2s (&dr->chk.query));
823  &dr->chk.query,
824  dr))
825  return; /* already active */
827  &dr->chk.query,
828  dr,
830  if (NULL == dc->mq)
831  return; /* download not active */
832  retry_entry (dc, &dr->chk.query, dr);
833 }
834 
835 
836 #define GNUNET_FS_URI_CHK_PREFIX GNUNET_FS_URI_PREFIX GNUNET_FS_URI_CHK_INFIX
837 
849 static void
851  const char *filename,
852  const struct GNUNET_FS_Uri *uri,
853  const struct GNUNET_CONTAINER_MetaData *meta,
854  size_t length,
855  const void *data)
856 {
857  struct GNUNET_FS_DownloadContext *dc = cls;
858  struct GNUNET_FS_DownloadContext *cpos;
859  char *temp_name;
860  char *fn;
861  char *us;
862  char *ext;
863  char *dn;
864  char *pos;
865  char *full_name;
866  char *sfn;
867 
868  if (NULL == uri)
869  return; /* entry for the directory itself */
870  cpos = dc->child_head;
871  while (NULL != cpos)
872  {
873  if ((GNUNET_FS_uri_test_equal (uri, cpos->uri)) ||
874  ((NULL != filename) && (0 == strcmp (cpos->filename, filename))))
875  break;
876  cpos = cpos->next;
877  }
878  if (NULL != cpos)
879  return; /* already exists */
880  fn = NULL;
881  if (NULL == filename)
882  {
884  if (NULL == fn)
885  {
887  fn = GNUNET_strdup (&us[strlen (GNUNET_FS_URI_CHK_PREFIX)]);
888  GNUNET_free (us);
889  }
890  else if ('.' == fn[0])
891  {
892  ext = fn;
894  GNUNET_asprintf (&fn,
895  "%s%s",
896  &us[strlen (GNUNET_FS_URI_CHK_PREFIX)],
897  ext);
898  GNUNET_free (ext);
899  GNUNET_free (us);
900  }
901  /* change '\' to '/' (this should have happened
902  * during insertion, but malicious peers may
903  * not have done this) */
904  while (NULL != (pos = strstr (fn, "\\")))
905  *pos = '/';
906  /* remove '../' everywhere (again, well-behaved
907  * peers don't do this, but don't trust that
908  * we did not get something nasty) */
909  while (NULL != (pos = strstr (fn, "../")))
910  {
911  pos[0] = '_';
912  pos[1] = '_';
913  pos[2] = '_';
914  }
915  filename = fn;
916  }
917  if (NULL == dc->filename)
918  {
919  full_name = NULL;
920  }
921  else
922  {
923  dn = GNUNET_strdup (dc->filename);
924  GNUNET_break (
925  (strlen (dn) >= strlen (GNUNET_FS_DIRECTORY_EXT)) &&
926  (NULL != strstr (dn + strlen (dn) - strlen (GNUNET_FS_DIRECTORY_EXT),
928  sfn = GNUNET_strdup (filename);
929  while ((strlen (sfn) > 0) && ('/' == filename[strlen (sfn) - 1]))
930  sfn[strlen (sfn) - 1] = '\0';
931  if ((strlen (dn) >= strlen (GNUNET_FS_DIRECTORY_EXT)) &&
932  (NULL != strstr (dn + strlen (dn) - strlen (GNUNET_FS_DIRECTORY_EXT),
934  dn[strlen (dn) - strlen (GNUNET_FS_DIRECTORY_EXT)] = '\0';
936  ((strlen (filename) < strlen (GNUNET_FS_DIRECTORY_EXT)) ||
937  (NULL == strstr (filename + strlen (filename)
938  - strlen (GNUNET_FS_DIRECTORY_EXT),
940  {
941  GNUNET_asprintf (&full_name,
942  "%s%s%s%s",
943  dn,
945  sfn,
947  }
948  else
949  {
950  GNUNET_asprintf (&full_name, "%s%s%s", dn, DIR_SEPARATOR_STR, sfn);
951  }
952  GNUNET_free (sfn);
953  GNUNET_free (dn);
954  }
955  if ((NULL != full_name) &&
957  {
959  _ (
960  "Failed to create directory for recursive download of `%s'\n"),
961  full_name);
962  GNUNET_free (full_name);
963  GNUNET_free (fn);
964  return;
965  }
966 
967  temp_name = NULL;
969  "Triggering recursive download of size %llu with %u bytes MD\n",
970  (unsigned long long) GNUNET_FS_uri_chk_get_file_size (uri),
972  meta));
974  uri,
975  meta,
976  full_name,
977  temp_name,
978  0,
980  dc->anonymity,
981  dc->options,
982  NULL,
983  dc);
984  GNUNET_free (full_name);
985  GNUNET_free (temp_name);
986  GNUNET_free (fn);
987 }
988 
989 
995 void
997 {
998  if (NULL == dr)
999  return;
1000  for (unsigned int i = 0; i < dr->num_children; i++)
1002  GNUNET_free (dr->children);
1003  GNUNET_free (dr);
1004 }
1005 
1006 
1016 static int
1018  const struct GNUNET_HashCode *key,
1019  void *value)
1020 {
1021  struct ProcessResultClosure *prc = cls;
1022  struct DownloadRequest *dr = value;
1023  struct GNUNET_FS_DownloadContext *dc = prc->dc;
1024  struct DownloadRequest *drc;
1025  struct GNUNET_DISK_FileHandle *fh = NULL;
1028  char pt[prc->size];
1029  struct GNUNET_FS_ProgressInfo pi;
1030  uint64_t off;
1031  size_t bs;
1032  size_t app;
1033  int i;
1034  struct ContentHashKey *chkarr;
1035 
1036  GNUNET_log (
1038  "Received %u byte block `%s' matching pending request at depth %u and offset %llu/%llu\n",
1039  (unsigned int) prc->size,
1040  GNUNET_h2s (key),
1041  dr->depth,
1042  (unsigned long long) dr->offset,
1043  (unsigned long long) GNUNET_ntohll (dc->uri->data.chk.file_length));
1045  dc->uri->data.chk.file_length),
1046  dr->offset,
1047  dr->depth);
1048  if (prc->size != bs)
1049  {
1050  GNUNET_asprintf (
1051  &dc->emsg,
1052  _ (
1053  "Internal error or bogus download URI (expected %lu bytes at depth %u and offset %llu/%llu, got %lu bytes)"),
1054  bs,
1055  dr->depth,
1056  (unsigned long long) dr->offset,
1057  (unsigned long long) GNUNET_ntohll (dc->uri->data.chk.file_length),
1058  prc->size);
1060  while (NULL != dr->parent)
1061  {
1062  dr->state = BRS_ERROR;
1063  dr = dr->parent;
1064  }
1065  dr->state = BRS_ERROR;
1066  goto signal_error;
1067  }
1068 
1069  (void) GNUNET_CONTAINER_multihashmap_remove (dc->active, &prc->query, dr);
1070  GNUNET_CRYPTO_hash_to_aes_key (&dr->chk.key, &skey, &iv);
1071  if (-1 ==
1072  GNUNET_CRYPTO_symmetric_decrypt (prc->data, prc->size, &skey, &iv, pt))
1073  {
1074  GNUNET_break (0);
1075  dc->emsg = GNUNET_strdup (_ ("internal error decrypting content"));
1076  goto signal_error;
1077  }
1079  dr->offset,
1080  dr->depth);
1081  /* save to disk */
1082  if ((GNUNET_YES == prc->do_store) &&
1083  ((NULL != dc->filename) || (is_recursive_download (dc))) &&
1084  ((dr->depth == dc->treedepth) ||
1086  {
1088  : dc->temp_filename,
1095  if (NULL == fh)
1096  {
1097  GNUNET_asprintf (&dc->emsg,
1098  _ ("Download failed: could not open file `%s': %s"),
1099  dc->filename,
1100  strerror (errno));
1101  goto signal_error;
1102  }
1104  "Saving decrypted block to disk at offset %llu\n",
1105  (unsigned long long) off);
1106  if ((off != GNUNET_DISK_file_seek (fh, off, GNUNET_DISK_SEEK_SET)))
1107  {
1108  GNUNET_asprintf (&dc->emsg,
1109  _ ("Failed to seek to offset %llu in file `%s': %s"),
1110  (unsigned long long) off,
1111  dc->filename,
1112  strerror (errno));
1113  goto signal_error;
1114  }
1115  if (prc->size != GNUNET_DISK_file_write (fh, pt, prc->size))
1116  {
1117  GNUNET_asprintf (
1118  &dc->emsg,
1119  _ ("Failed to write block of %u bytes at offset %llu in file `%s': %s"),
1120  (unsigned int) prc->size,
1121  (unsigned long long) off,
1122  dc->filename,
1123  strerror (errno));
1124  goto signal_error;
1125  }
1127  fh = NULL;
1128  }
1129 
1130  if (0 == dr->depth)
1131  {
1132  /* DBLOCK, update progress and try recursion if applicable */
1133  app = prc->size;
1134  if (dr->offset < dc->offset)
1135  {
1136  /* starting offset begins in the middle of pt,
1137  * do not count first bytes as progress */
1138  GNUNET_assert (app > (dc->offset - dr->offset));
1139  app -= (dc->offset - dr->offset);
1140  }
1141  if (dr->offset + prc->size > dc->offset + dc->length)
1142  {
1143  /* end of block is after relevant range,
1144  * do not count last bytes as progress */
1145  GNUNET_assert (app >
1146  (dr->offset + prc->size) - (dc->offset + dc->length));
1147  app -= (dr->offset + prc->size) - (dc->offset + dc->length);
1148  }
1149  dc->completed += app;
1150 
1151  /* do recursive download if option is set and either meta data
1152  * says it is a directory or if no meta data is given AND filename
1153  * ends in '.gnd' (top-level case) */
1154  if (is_recursive_download (dc))
1156  pt,
1157  off,
1159  dc);
1160  }
1162  dr->state = BRS_DOWNLOAD_DOWN;
1164  pi.value.download.specifics.progress.data = pt;
1165  pi.value.download.specifics.progress.offset = dr->offset;
1166  pi.value.download.specifics.progress.data_len = prc->size;
1167  pi.value.download.specifics.progress.depth = dr->depth;
1168  pi.value.download.specifics.progress.respect_offered = prc->respect_offered;
1169  pi.value.download.specifics.progress.num_transmissions =
1170  prc->num_transmissions;
1171  if (prc->last_transmission.abs_value_us !=
1172  GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us)
1173  pi.value.download.specifics.progress.block_download_duration =
1175  else
1176  pi.value.download.specifics.progress.block_download_duration =
1177  GNUNET_TIME_UNIT_ZERO; /* found locally */
1179  if (0 == dr->depth)
1180  propagate_up (dr);
1181 
1182  if (dc->completed == dc->length)
1183  {
1184  /* download completed, signal */
1186  "Download completed, truncating file to desired length %llu\n",
1187  (unsigned long long) GNUNET_ntohll (
1188  dc->uri->data.chk.file_length));
1189  /* truncate file to size (since we store IBlocks at the end) */
1190  if (NULL != dc->filename)
1191  {
1192  if (0 != truncate (dc->filename,
1195  "truncate",
1196  dc->filename);
1197  }
1198  GNUNET_assert (0 == dr->depth);
1199  check_completed (dc);
1200  }
1201  if (0 == dr->depth)
1202  {
1203  /* bottom of the tree, no child downloads possible, just sync */
1205  return GNUNET_YES;
1206  }
1207 
1208  GNUNET_log (
1210  "Triggering downloads of children (this block was at depth %u and offset %llu)\n",
1211  dr->depth,
1212  (unsigned long long) dr->offset);
1213  GNUNET_assert (0 == (prc->size % sizeof(struct ContentHashKey)));
1214  chkarr = (struct ContentHashKey *) pt;
1215  for (i = dr->num_children - 1; i >= 0; i--)
1216  {
1217  drc = dr->children[i];
1218  switch (drc->state)
1219  {
1220  case BRS_INIT:
1221  if ((drc->chk_idx + 1) * sizeof(struct ContentHashKey) > prc->size)
1222  {
1223  /* 'chkarr' does not have enough space for this chk_idx;
1224  internal error! */
1225  GNUNET_break (0);
1226  GNUNET_assert (0);
1227  dc->emsg = GNUNET_strdup (_ ("internal error decoding tree"));
1228  goto signal_error;
1229  }
1230  drc->chk = chkarr[drc->chk_idx];
1231  drc->state = BRS_CHK_SET;
1232  if (GNUNET_YES == dc->issue_requests)
1233  schedule_block_download (dc, drc);
1234  break;
1235 
1236  case BRS_RECONSTRUCT_DOWN:
1237  GNUNET_assert (0);
1238  break;
1239 
1241  GNUNET_assert (0);
1242  break;
1243 
1244  case BRS_RECONSTRUCT_UP:
1245  GNUNET_assert (0);
1246  break;
1247 
1248  case BRS_CHK_SET:
1249  GNUNET_assert (0);
1250  break;
1251 
1252  case BRS_DOWNLOAD_DOWN:
1253  GNUNET_assert (0);
1254  break;
1255 
1256  case BRS_DOWNLOAD_UP:
1257  GNUNET_assert (0);
1258  break;
1259 
1260  case BRS_ERROR:
1261  GNUNET_assert (0);
1262  break;
1263 
1264  default:
1265  GNUNET_assert (0);
1266  break;
1267  }
1268  }
1270  return GNUNET_YES;
1271 
1272 signal_error:
1273  if (NULL != fh)
1276  pi.value.download.specifics.error.message = dc->emsg;
1278  GNUNET_MQ_destroy (dc->mq);
1279  dc->mq = NULL;
1281  dc->top_request = NULL;
1282  if (NULL != dc->job_queue)
1283  {
1285  dc->job_queue = NULL;
1286  }
1288  return GNUNET_NO;
1289 }
1290 
1291 
1299 static int
1300 check_put (void *cls, const struct ClientPutMessage *cm)
1301 {
1302  /* any varsize length is OK */
1303  return GNUNET_OK;
1304 }
1305 
1306 
1314 static void
1315 handle_put (void *cls, const struct ClientPutMessage *cm)
1316 {
1317  struct GNUNET_FS_DownloadContext *dc = cls;
1318  uint16_t msize = ntohs (cm->header.size) - sizeof(*cm);
1319  struct ProcessResultClosure prc;
1320 
1321  prc.dc = dc;
1322  prc.data = &cm[1];
1324  prc.size = msize;
1325  prc.type = ntohl (cm->type);
1326  prc.do_store = GNUNET_YES;
1327  prc.respect_offered = ntohl (cm->respect_offered);
1328  prc.num_transmissions = ntohl (cm->num_transmissions);
1329  GNUNET_CRYPTO_hash (prc.data, msize, &prc.query);
1331  "Received result for query `%s' from FS service\n",
1332  GNUNET_h2s (&prc.query));
1334  &prc.query,
1336  &prc);
1337 }
1338 
1339 
1348 static void
1350 {
1351  struct GNUNET_FS_DownloadContext *dc = cls;
1352 
1353  if (NULL != dc->mq)
1354  {
1355  GNUNET_MQ_destroy (dc->mq);
1356  dc->mq = NULL;
1357  }
1359  "Transmitting download request failed, trying to reconnect\n");
1360  try_reconnect (dc);
1361 }
1362 
1363 
1369 static void
1370 do_reconnect (void *cls)
1371 {
1372  struct GNUNET_FS_DownloadContext *dc = cls;
1374  { GNUNET_MQ_hd_var_size (put,
1376  struct ClientPutMessage,
1377  dc),
1378  GNUNET_MQ_handler_end () };
1379 
1380  dc->task = NULL;
1382  "fs",
1383  handlers,
1385  dc);
1386  if (NULL == dc->mq)
1387  {
1389  "Connecting to `%s'-service failed, will try again.\n",
1390  "FS");
1391  try_reconnect (dc);
1392  return;
1393  }
1395 }
1396 
1397 
1405 static void
1407 {
1408  if (NULL != dc->mq)
1409  {
1411  "Moving all requests back to pending list\n");
1412  GNUNET_MQ_destroy (dc->mq);
1413  dc->mq = NULL;
1414  }
1415  if (0 == dc->reconnect_backoff.rel_value_us)
1417  else
1419 
1421  "Will try to reconnect in %s\n",
1423  GNUNET_YES));
1424  GNUNET_break (NULL != dc->job_queue);
1425  dc->task =
1427 }
1428 
1429 
1436 static void
1438 {
1439  struct GNUNET_FS_DownloadContext *dc = cls;
1440  struct GNUNET_FS_ProgressInfo pi;
1441 
1442  GNUNET_assert (NULL == dc->mq);
1443  GNUNET_assert (NULL != dc->active);
1444  do_reconnect (dc);
1445  if (NULL != dc->mq)
1446  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Download activated\n");
1449 }
1450 
1451 
1457 static void
1459 {
1460  struct GNUNET_FS_DownloadContext *dc = cls;
1461  struct GNUNET_FS_ProgressInfo pi;
1462 
1463  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Download deactivated\n");
1464  if (NULL != dc->mq)
1465  {
1466  GNUNET_MQ_destroy (dc->mq);
1467  dc->mq = NULL;
1468  }
1471 }
1472 
1473 
1493 static struct DownloadRequest *
1495  unsigned int chk_idx,
1496  unsigned int depth,
1497  uint64_t dr_offset,
1498  uint64_t file_start_offset,
1499  uint64_t desired_length)
1500 {
1501  struct DownloadRequest *dr;
1502  unsigned int i;
1503  unsigned int head_skip;
1504  uint64_t child_block_size;
1505 
1506  dr = GNUNET_new (struct DownloadRequest);
1507  dr->parent = parent;
1508  dr->depth = depth;
1509  dr->offset = dr_offset;
1510  dr->chk_idx = chk_idx;
1511  if (0 == depth)
1512  return dr;
1513  child_block_size = GNUNET_FS_tree_compute_tree_size (depth - 1);
1514 
1515  /* calculate how many blocks at this level are not interesting
1516  * from the start (rounded down), either because of the requested
1517  * file offset or because this IBlock is further along */
1518  if (dr_offset < file_start_offset)
1519  {
1520  head_skip = (file_start_offset - dr_offset) / child_block_size;
1521  }
1522  else
1523  {
1524  head_skip = 0;
1525  }
1526 
1527  /* calculate index of last block at this level that is interesting (rounded up) */
1528  dr->num_children =
1529  (file_start_offset + desired_length - dr_offset) / child_block_size;
1530  if (dr->num_children * child_block_size <
1531  file_start_offset + desired_length - dr_offset)
1532  dr->num_children++; /* round up */
1533  GNUNET_assert (dr->num_children > head_skip);
1534  dr->num_children -= head_skip;
1535  if (dr->num_children > CHK_PER_INODE)
1536  dr->num_children = CHK_PER_INODE; /* cap at max */
1538  "Block at offset %llu and depth %u has %u children\n",
1539  (unsigned long long) dr_offset,
1540  depth,
1541  dr->num_children);
1542 
1543  /* now we can get the total number of *interesting* children for this block */
1544 
1545  /* why else would we have gotten here to begin with? (that'd be a bad logic error) */
1546  GNUNET_assert (dr->num_children > 0);
1547 
1548  dr->children = GNUNET_new_array (dr->num_children, struct DownloadRequest *);
1549  for (i = 0; i < dr->num_children; i++)
1550  {
1551  dr->children[i] =
1553  i + head_skip,
1554  depth - 1,
1555  dr_offset + (i + head_skip) * child_block_size,
1556  file_start_offset,
1557  desired_length);
1558  }
1559  return dr;
1560 }
1561 
1562 
1569 static void
1570 reconstruct_cont (void *cls)
1571 {
1572  struct GNUNET_FS_DownloadContext *dc = cls;
1573 
1574  /* clean up state from tree encoder */
1575  if (NULL != dc->task)
1576  {
1578  dc->task = NULL;
1579  }
1580  if (NULL != dc->rfh)
1581  {
1583  dc->rfh = NULL;
1584  }
1585  /* start "normal" download */
1587  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting normal download\n");
1589 }
1590 
1591 
1597 static void
1598 get_next_block (void *cls)
1599 {
1600  struct GNUNET_FS_DownloadContext *dc = cls;
1601 
1602  dc->task = NULL;
1604 }
1605 
1606 
1624 static void
1625 reconstruct_cb (void *cls,
1626  const struct ContentHashKey *chk,
1627  uint64_t offset,
1628  unsigned int depth,
1629  enum GNUNET_BLOCK_Type type,
1630  const void *block,
1631  uint16_t block_size)
1632 {
1633  struct GNUNET_FS_DownloadContext *dc = cls;
1634  struct GNUNET_FS_ProgressInfo pi;
1635  struct DownloadRequest *dr;
1636  uint64_t blen;
1637  unsigned int chld;
1638 
1639  /* find corresponding request entry */
1640  dr = dc->top_request;
1641  while (dr->depth > depth)
1642  {
1643  GNUNET_assert (dr->num_children > 0);
1644  blen = GNUNET_FS_tree_compute_tree_size (dr->depth - 1);
1645  chld = (offset - dr->offset) / blen;
1646  if (chld < dr->children[0]->chk_idx)
1647  {
1649  "Block %u < %u irrelevant for our range\n",
1650  chld,
1651  dr->children[0]->chk_idx);
1653  return; /* irrelevant block */
1654  }
1655  if (chld > dr->children[dr->num_children - 1]->chk_idx)
1656  {
1658  "Block %u > %u irrelevant for our range\n",
1659  chld,
1660  dr->children[dr->num_children - 1]->chk_idx);
1662  return; /* irrelevant block */
1663  }
1664  dr = dr->children[chld - dr->children[0]->chk_idx];
1665  }
1666  GNUNET_log (
1668  "Matched TE block with request at offset %llu and depth %u in state %d\n",
1669  (unsigned long long) dr->offset,
1670  dr->depth,
1671  dr->state);
1672  /* FIXME: this code needs more testing and might
1673  need to handle more states... */
1674  switch (dr->state)
1675  {
1676  case BRS_INIT:
1677  break;
1678 
1679  case BRS_RECONSTRUCT_DOWN:
1680  break;
1681 
1683  break;
1684 
1685  case BRS_RECONSTRUCT_UP:
1686  break;
1687 
1688  case BRS_CHK_SET:
1689  if (0 == memcmp (chk, &dr->chk, sizeof(struct ContentHashKey)))
1690  {
1691  GNUNET_log (
1693  "Reconstruction succeeded, can use block at offset %llu, depth %u\n",
1694  (unsigned long long) offset,
1695  depth);
1696  /* block matches, hence tree below matches;
1697  * this request is done! */
1698  dr->state = BRS_DOWNLOAD_UP;
1700  &dr->chk.query,
1701  dr);
1702  /* calculate how many bytes of payload this block
1703  * corresponds to */
1705  /* how many of those bytes are in the requested range? */
1706  blen = GNUNET_MIN (blen, dc->length + dc->offset - dr->offset);
1707  /* signal progress */
1708  dc->completed += blen;
1710  pi.value.download.specifics.progress.data = NULL;
1711  pi.value.download.specifics.progress.offset = offset;
1712  pi.value.download.specifics.progress.data_len = 0;
1713  pi.value.download.specifics.progress.depth = 0;
1714  pi.value.download.specifics.progress.respect_offered = 0;
1715  pi.value.download.specifics.progress.block_download_duration =
1718  /* FIXME: duplicated code from 'process_result_with_request - refactor */
1719  if (dc->completed == dc->length)
1720  {
1721  /* download completed, signal */
1723  "Download completed, truncating file to desired length %llu\n",
1724  (unsigned long long) GNUNET_ntohll (
1725  dc->uri->data.chk.file_length));
1726  /* truncate file to size (since we store IBlocks at the end) */
1727  if (NULL != dc->filename)
1728  {
1729  if (0 != truncate (dc->filename,
1732  "truncate",
1733  dc->filename);
1734  }
1735  }
1736  }
1737  else
1738  GNUNET_log (
1740  "Reconstruction failed, need to download block at offset %llu, depth %u\n",
1741  (unsigned long long) offset,
1742  depth);
1743  break;
1744 
1745  case BRS_DOWNLOAD_DOWN:
1746  break;
1747 
1748  case BRS_DOWNLOAD_UP:
1749  break;
1750 
1751  case BRS_ERROR:
1752  break;
1753 
1754  default:
1755  GNUNET_assert (0);
1756  break;
1757  }
1759  if ((dr == dc->top_request) && (dr->state == BRS_DOWNLOAD_UP))
1760  check_completed (dc);
1761 }
1762 
1763 
1776 static size_t
1777 fh_reader (void *cls, uint64_t offset, size_t max, void *buf, char **emsg)
1778 {
1779  struct GNUNET_FS_DownloadContext *dc = cls;
1780  struct GNUNET_DISK_FileHandle *fh = dc->rfh;
1781  ssize_t ret;
1782 
1783  if (NULL != emsg)
1784  *emsg = NULL;
1785  if (offset != GNUNET_DISK_file_seek (fh, offset, GNUNET_DISK_SEEK_SET))
1786  {
1787  if (NULL != emsg)
1788  *emsg = GNUNET_strdup (strerror (errno));
1789  return 0;
1790  }
1792  if (ret < 0)
1793  {
1794  if (NULL != emsg)
1795  *emsg = GNUNET_strdup (strerror (errno));
1796  return 0;
1797  }
1798  return ret;
1799 }
1800 
1801 
1808 void
1810 {
1811  struct GNUNET_FS_DownloadContext *dc = cls;
1812  struct GNUNET_FS_ProgressInfo pi;
1813  struct GNUNET_DISK_FileHandle *fh;
1814 
1815  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Start task running...\n");
1816  dc->task = NULL;
1817  if (0 == dc->length)
1818  {
1819  /* no bytes required! */
1820  if (NULL != dc->filename)
1821  {
1825  | ((0 ==
1828  : 0),
1834  }
1837  pi.value.download.specifics.start.meta = dc->meta;
1839  check_completed (dc);
1840  return;
1841  }
1842  if (NULL != dc->emsg)
1843  return;
1844  if (NULL == dc->top_request)
1845  {
1847  0,
1848  dc->treedepth - 1,
1849  0,
1850  dc->offset,
1851  dc->length);
1854  ? dc->uri->data.chk.chk
1855  : dc->uri->data.loc.fi.chk;
1856  /* signal start */
1858  if (NULL != dc->search)
1861  pi.value.download.specifics.start.meta = dc->meta;
1863  }
1865  /* attempt reconstruction from disk */
1870  if (dc->top_request->state == BRS_CHK_SET)
1871  {
1872  if (NULL != dc->rfh)
1873  {
1874  /* first, try top-down */
1876  "Trying top-down reconstruction for `%s'\n",
1877  dc->filename);
1879  switch (dc->top_request->state)
1880  {
1881  case BRS_CHK_SET:
1882  break; /* normal */
1883 
1884  case BRS_DOWNLOAD_DOWN:
1885  break; /* normal, some blocks already down */
1886 
1887  case BRS_DOWNLOAD_UP:
1888  /* already done entirely, party! */
1889  if (NULL != dc->rfh)
1890  {
1891  /* avoid hanging on to file handle longer than
1892  * necessary */
1894  dc->rfh = NULL;
1895  }
1896  return;
1897 
1898  case BRS_ERROR:
1899  GNUNET_asprintf (&dc->emsg, _ ("Invalid URI"));
1902  pi.value.download.specifics.error.message = dc->emsg;
1904  return;
1905 
1906  default:
1907  GNUNET_assert (0);
1908  break;
1909  }
1910  }
1911  }
1912  /* attempt reconstruction from meta data */
1914  (NULL != dc->meta))
1915  {
1916  GNUNET_log (
1918  "Trying to find embedded meta data for download of size %llu with %u bytes MD\n",
1919  (unsigned long long) GNUNET_FS_uri_chk_get_file_size (dc->uri),
1923  {
1924  if (NULL != dc->rfh)
1925  {
1926  /* avoid hanging on to file handle longer than
1927  * necessary */
1929  dc->rfh = NULL;
1930  }
1931  return; /* finished, status update was already done for us */
1932  }
1933  }
1934  if (NULL != dc->rfh)
1935  {
1936  /* finally, actually run bottom-up */
1938  "Trying bottom-up reconstruction of file `%s'\n",
1939  dc->filename);
1940  dc->te =
1943  dc,
1944  &fh_reader,
1945  &reconstruct_cb,
1946  NULL,
1947  &reconstruct_cont);
1949  }
1950  else
1951  {
1952  /* simple, top-level download */
1955  }
1957  check_completed (dc);
1958 }
1959 
1960 
1967 void
1969 {
1970  struct GNUNET_FS_DownloadContext *dc = cls;
1971  struct GNUNET_FS_ProgressInfo pi;
1972 
1973  if (NULL != dc->top)
1974  GNUNET_FS_end_top (dc->h, dc->top);
1975  while (NULL != dc->child_head)
1977  if (NULL != dc->search)
1978  {
1979  dc->search->download = NULL;
1980  dc->search = NULL;
1981  }
1982  if (NULL != dc->job_queue)
1983  {
1985  dc->job_queue = NULL;
1986  }
1987  if (NULL != dc->parent)
1989  dc->parent->child_tail,
1990  dc);
1991  if (NULL != dc->task)
1992  {
1994  dc->task = NULL;
1995  }
1998  if (NULL != dc->te)
1999  {
2001  dc->te = NULL;
2002  }
2003  if (NULL != dc->rfh)
2004  {
2006  dc->rfh = NULL;
2007  }
2009  if (NULL != dc->active)
2010  {
2012  dc->active = NULL;
2013  }
2014  GNUNET_free (dc->filename);
2019  GNUNET_assert (NULL == dc->job_queue);
2020  GNUNET_free (dc);
2021 }
2022 
2023 
2045  const struct GNUNET_FS_Uri *uri,
2046  const struct GNUNET_CONTAINER_MetaData *meta,
2047  const char *filename,
2048  const char *tempname,
2049  uint64_t offset,
2050  uint64_t length,
2051  uint32_t anonymity,
2053  void *cctx)
2054 {
2055  struct GNUNET_FS_DownloadContext *dc;
2056 
2058  if ((offset + length < offset) ||
2060  {
2061  GNUNET_break (0);
2062  return NULL;
2063  }
2066  "Starting download %p, %u bytes at offset %llu\n",
2067  dc,
2068  (unsigned int) length,
2069  (unsigned long long) offset);
2070  dc->h = h;
2071  dc->uri = GNUNET_FS_uri_dup (uri);
2073  dc->client_info = cctx;
2075  if (NULL != filename)
2076  {
2080  &dc->old_file_size,
2081  GNUNET_YES,
2082  GNUNET_YES));
2083  }
2084  if (GNUNET_FS_uri_test_loc (dc->uri))
2087  dc->offset = offset;
2088  dc->length = length;
2089  dc->anonymity = anonymity;
2090  dc->options = options;
2091  dc->active =
2093  GNUNET_NO);
2094  dc->treedepth =
2096  if ((NULL == filename) && (is_recursive_download (dc)))
2097  {
2098  if (NULL != tempname)
2099  dc->temp_filename = GNUNET_strdup (tempname);
2100  else
2101  dc->temp_filename = GNUNET_DISK_mktemp ("gnunet-directory-download-tmp");
2102  }
2104  "Starting download `%s' of %llu bytes with tree depth %u\n",
2105  filename,
2106  (unsigned long long) length,
2107  dc->treedepth);
2108  GNUNET_assert (NULL == dc->job_queue);
2110  return dc;
2111 }
2112 
2113 
2146  const struct GNUNET_FS_Uri *uri,
2147  const struct GNUNET_CONTAINER_MetaData *meta,
2148  const char *filename,
2149  const char *tempname,
2150  uint64_t offset,
2151  uint64_t length,
2152  uint32_t anonymity,
2154  void *cctx,
2156 {
2157  struct GNUNET_FS_DownloadContext *dc;
2158 
2160  uri,
2161  meta,
2162  filename,
2163  tempname,
2164  offset,
2165  length,
2166  anonymity,
2167  options,
2168  cctx);
2169  if (NULL == dc)
2170  return NULL;
2171  dc->parent = parent;
2172  if (NULL != parent)
2174  else if (0 == (GNUNET_FS_DOWNLOAD_IS_PROBE & options))
2175  dc->top =
2177  return dc;
2178 }
2179 
2180 
2217  struct GNUNET_FS_SearchResult *sr,
2218  const char *filename,
2219  const char *tempname,
2220  uint64_t offset,
2221  uint64_t length,
2222  uint32_t anonymity,
2224  void *cctx)
2225 {
2226  struct GNUNET_FS_DownloadContext *dc;
2227 
2228  if ((NULL == sr) || (NULL != sr->download))
2229  {
2230  GNUNET_break (0);
2231  return NULL;
2232  }
2234  sr->uri,
2235  sr->meta,
2236  filename,
2237  tempname,
2238  offset,
2239  length,
2240  anonymity,
2241  options,
2242  cctx);
2243  if (NULL == dc)
2244  return NULL;
2245  dc->search = sr;
2246  sr->download = dc;
2247  if (NULL != sr->probe_ctx)
2248  {
2250  sr->probe_ctx = NULL;
2252  }
2253  return dc;
2254 }
2255 
2256 
2262 void
2264 {
2265  if (dc->completed == dc->length)
2266  return;
2267  if (NULL != dc->mq)
2268  return; /* already running */
2269  GNUNET_assert (NULL == dc->job_queue);
2270  GNUNET_assert (NULL == dc->task);
2271  GNUNET_assert (NULL != dc->active);
2272  dc->job_queue =
2273  GNUNET_FS_queue_ (dc->h,
2276  dc,
2277  (dc->length + DBLOCK_SIZE - 1) / DBLOCK_SIZE,
2282  "Download %p put into queue as job %p\n",
2283  dc,
2284  dc->job_queue);
2285 }
2286 
2287 
2293 void
2295 {
2297 }
2298 
2299 
2305 void
2307 {
2308  struct GNUNET_FS_ProgressInfo pi;
2309 
2312 
2313  GNUNET_assert (NULL == dc->task);
2314  dc->job_queue =
2315  GNUNET_FS_queue_ (dc->h,
2318  dc,
2319  (dc->length + DBLOCK_SIZE - 1) / DBLOCK_SIZE,
2323 }
2324 
2325 
2332 void
2334 {
2335  struct GNUNET_FS_ProgressInfo pi;
2336  int have_children;
2337  int search_was_null;
2338 
2339  if (NULL != dc->top)
2340  GNUNET_FS_end_top (dc->h, dc->top);
2341  if (NULL != dc->task)
2342  {
2344  dc->task = NULL;
2345  }
2346  search_was_null = (NULL == dc->search);
2347  if (NULL != dc->search)
2348  {
2349  dc->search->download = NULL;
2351  dc->search = NULL;
2352  }
2353  if (NULL != dc->job_queue)
2354  {
2356  dc->job_queue = NULL;
2357  }
2358  if (NULL != dc->te)
2359  {
2361  dc->te = NULL;
2362  }
2363  have_children = (NULL != dc->child_head) ? GNUNET_YES : GNUNET_NO;
2364  while (NULL != dc->child_head)
2365  GNUNET_FS_download_stop (dc->child_head, do_delete);
2366  if (NULL != dc->parent)
2368  dc->parent->child_tail,
2369  dc);
2370  if (NULL != dc->serialization)
2372  ((NULL != dc->parent) || (! search_was_null))
2375  dc->serialization);
2376  if ((GNUNET_YES == have_children) && (NULL == dc->parent))
2378  (! search_was_null)
2381  dc->serialization);
2385  dc->top_request = NULL;
2386  if (NULL != dc->active)
2387  {
2389  dc->active = NULL;
2390  }
2391  if (NULL != dc->filename)
2392  {
2393  if ((dc->completed != dc->length) && (GNUNET_YES == do_delete))
2394  {
2395  if ((0 != unlink (dc->filename)) && (ENOENT != errno))
2397  "unlink",
2398  dc->filename);
2399  }
2400  GNUNET_free (dc->filename);
2401  }
2404  if (NULL != dc->temp_filename)
2405  {
2406  if (0 != unlink (dc->temp_filename))
2408  "unlink",
2409  dc->temp_filename);
2411  }
2413  GNUNET_assert (NULL == dc->job_queue);
2414  GNUNET_free (dc);
2415 }
2416 
2417 
2418 /* end of fs_download.c */
struct GNUNET_GETOPT_CommandLineOption options[]
Definition: 002.c:5
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
#define DBLOCK_SIZE
Size of the individual blocks used for file-sharing.
Definition: fs.h:40
void GNUNET_FS_search_result_sync_(struct GNUNET_FS_SearchResult *sr)
Synchronize this search result with its mirror on disk.
Definition: fs_api.c:2165
struct TopLevelActivity * GNUNET_FS_make_top(struct GNUNET_FS_Handle *h, SuspendSignalFunction ssf, void *ssf_cls)
Create a top-level activity entry.
Definition: fs_api.c:391
void GNUNET_FS_download_sync_(struct GNUNET_FS_DownloadContext *dc)
Synchronize this download struct with its mirror on disk.
Definition: fs_api.c:2052
void GNUNET_FS_remove_sync_file_(struct GNUNET_FS_Handle *h, const char *ext, const char *ent)
Remove serialization/deserialization file from disk.
Definition: fs_api.c:744
void GNUNET_FS_remove_sync_dir_(struct GNUNET_FS_Handle *h, const char *ext, const char *uni)
Remove serialization/deserialization directory from disk.
Definition: fs_api.c:803
void GNUNET_FS_dequeue_(struct GNUNET_FS_QueueEntry *qe)
Dequeue a job from the queue.
Definition: fs_api.c:366
struct GNUNET_FS_QueueEntry * GNUNET_FS_queue_(struct GNUNET_FS_Handle *h, GNUNET_SCHEDULER_TaskCallback start, GNUNET_SCHEDULER_TaskCallback stop, void *cls, unsigned int blocks, enum GNUNET_FS_QueuePriority priority)
Add a job to the queue.
Definition: fs_api.c:331
void GNUNET_FS_end_top(struct GNUNET_FS_Handle *h, struct TopLevelActivity *top)
Destroy a top-level activity entry.
Definition: fs_api.c:412
shared definitions for the FS library
@ BRS_DOWNLOAD_UP
This block and all of its children have been downloaded successfully (full completion propagates up).
Definition: fs_api.h:1660
@ BRS_RECONSTRUCT_META_UP
We've calculated the CHK bottom-up based on the meta data.
Definition: fs_api.h:1628
@ BRS_CHK_SET
We've determined the real, desired CHK for this block (full tree reconstruction failed),...
Definition: fs_api.h:1645
@ BRS_ERROR
We got a block back that matched the query but did not hash to the key (malicious publisher or hash c...
Definition: fs_api.h:1667
@ BRS_RECONSTRUCT_DOWN
We've checked the block on the path down the tree, and the content on disk did match the desired CHK,...
Definition: fs_api.h:1620
@ BRS_INIT
Initial state, block has only been allocated (since it is relevant to the overall download request).
Definition: fs_api.h:1612
@ BRS_DOWNLOAD_DOWN
We've successfully downloaded this block, but the children still need to be either downloaded or veri...
Definition: fs_api.h:1654
@ BRS_RECONSTRUCT_UP
We've calculated the CHK bottom-up based on what we have on disk, which may not be what the desired C...
Definition: fs_api.h:1636
#define MAX_INLINE_SIZE
Maximum size for a file to be considered for inlining in a directory.
Definition: fs_api.h:49
@ GNUNET_FS_URI_CHK
Content-hash-key (simple file).
Definition: fs_api.h:143
#define GNUNET_FS_SYNC_PATH_MASTER_DOWNLOAD
Name of the directory with master downloads (not associated with search or part of another download).
Definition: fs_api.h:65
void GNUNET_FS_stop_probe_ping_task_(struct GNUNET_FS_SearchResult *sr)
Stop the ping task for this search result.
Definition: fs_search.c:409
#define CHK_PER_INODE
Pick a multiple of 2 here to achieve 8-byte alignment! We also probably want DBlocks to have (roughly...
Definition: fs_api.h:43
@ GNUNET_FS_QUEUE_PRIORITY_NORMAL
Default priority.
Definition: fs_api.h:412
@ GNUNET_FS_QUEUE_PRIORITY_PROBE
This is a probe (low priority).
Definition: fs_api.h:407
void * GNUNET_FS_search_probe_progress_(void *cls, const struct GNUNET_FS_ProgressInfo *info)
Notification of FS that a search probe has made progress.
Definition: fs_search.c:280
#define GNUNET_FS_SYNC_PATH_CHILD_DOWNLOAD
Name of the directory with downloads that are part of another download or a search.
Definition: fs_api.h:71
void GNUNET_FS_download_signal_suspend_(void *cls)
Create SUSPEND event for the given download operation and then clean up our state (without stop signa...
Definition: fs_download.c:1968
static int retry_entry(void *cls, const struct GNUNET_HashCode *key, void *entry)
Add entries to the message queue.
Definition: fs_download.c:746
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)
Function called asking for the current (encoded) block to be processed.
Definition: fs_download.c:1625
static void propagate_up(struct DownloadRequest *dr)
Set the state of the given download request to BRS_DOWNLOAD_UP and propagate it up the tree.
Definition: fs_download.c:633
static void check_completed(struct GNUNET_FS_DownloadContext *dc)
Check if all child-downloads have completed (or trigger them if necessary) and once we're completely ...
Definition: fs_download.c:375
static void handle_put(void *cls, const struct ClientPutMessage *cm)
Type of a function to call when we receive a message from the service.
Definition: fs_download.c:1315
static int check_put(void *cls, const struct ClientPutMessage *cm)
Type of a function to call when we check the PUT message from the service.
Definition: fs_download.c:1300
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)
We found an entry in a directory.
Definition: fs_download.c:850
void GNUNET_FS_free_download_request_(struct DownloadRequest *dr)
(recursively) free download request structure
Definition: fs_download.c:996
static void activate_fs_download(void *cls)
We're allowed to ask the FS service for our blocks.
Definition: fs_download.c:1437
static size_t fh_reader(void *cls, uint64_t offset, size_t max, void *buf, char **emsg)
Function called by the tree encoder to obtain a block of plaintext data (for the lowest level of the ...
Definition: fs_download.c:1777
static void try_top_down_reconstruction(struct GNUNET_FS_DownloadContext *dc, struct DownloadRequest *dr)
Try top-down reconstruction.
Definition: fs_download.c:662
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)
Type of a function that libextractor calls for each meta data item found.
Definition: fs_download.c:601
static int process_result_with_request(void *cls, const struct GNUNET_HashCode *key, void *value)
Iterator over entries in the pending requests in the 'active' map for the reply that we just got.
Definition: fs_download.c:1017
void GNUNET_FS_download_make_status_(struct GNUNET_FS_ProgressInfo *pi, struct GNUNET_FS_DownloadContext *dc)
Fill in all of the generic fields for a download event and call the callback.
Definition: fs_download.c:103
static void deactivate_fs_download(void *cls)
We must stop to ask the FS service for our blocks.
Definition: fs_download.c:1458
void GNUNET_FS_download_start_task_(void *cls)
Task that creates the initial (top-level) download request for the file.
Definition: fs_download.c:1809
static void reconstruct_cont(void *cls)
Continuation after a possible attempt to reconstruct the current IBlock from the existing file.
Definition: fs_download.c:1570
static int is_recursive_download(struct GNUNET_FS_DownloadContext *dc)
Determine if the given download (options and meta data) should cause use to try to do a recursive dow...
Definition: fs_download.c:37
static int encrypt_existing_match(struct GNUNET_FS_DownloadContext *dc, const struct ContentHashKey *chk, struct DownloadRequest *dr, const char *block, size_t len, int do_store)
We've found a matching block without downloading it.
Definition: fs_download.c:212
static void do_reconnect(void *cls)
Reconnect to the FS service and transmit our queries NOW.
Definition: fs_download.c:1370
static void try_match_block(struct GNUNET_FS_DownloadContext *dc, struct DownloadRequest *dr, const char *data, size_t data_len)
We got a block of plaintext data (from the meta data).
Definition: fs_download.c:431
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)
(recursively) Create a download request structure.
Definition: fs_download.c:1494
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)
Helper function to setup the download context.
Definition: fs_download.c:2044
void GNUNET_FS_download_start_downloading_(struct GNUNET_FS_DownloadContext *dc)
Start the downloading process (by entering the queue).
Definition: fs_download.c:2263
static uint64_t compute_disk_offset(uint64_t fsize, uint64_t off, unsigned int depth)
We're storing the IBLOCKS after the DBLOCKS on disk (so that we only have to truncate the file once w...
Definition: fs_download.c:67
static void get_next_block(void *cls)
Task requesting the next block from the tree encoder.
Definition: fs_download.c:1598
static void full_recursive_download(struct GNUNET_FS_DownloadContext *dc)
We're done downloading a directory.
Definition: fs_download.c:295
#define GNUNET_FS_URI_CHK_PREFIX
Definition: fs_download.c:836
static void download_mq_error_handler(void *cls, enum GNUNET_MQ_Error error)
Generic error handler, called with the appropriate error code and the same closure specified at the c...
Definition: fs_download.c:1349
static void try_reconnect(struct GNUNET_FS_DownloadContext *dc)
We've lost our connection with the FS service.
Definition: fs_download.c:1406
static void schedule_block_download(struct GNUNET_FS_DownloadContext *dc, struct DownloadRequest *dr)
Schedule the download of the specified block in the tree.
Definition: fs_download.c:777
void GNUNET_FS_tree_encoder_next(struct GNUNET_FS_TreeEncoder *te)
Encrypt the next block of the file (and call proc and progress accordingly; or of course "cont" if we...
Definition: fs_tree.c:331
unsigned int GNUNET_FS_compute_depth(uint64_t flen)
Compute the depth of the CHK tree.
Definition: fs_tree.c:125
void GNUNET_FS_tree_encoder_finish(struct GNUNET_FS_TreeEncoder *te, char **emsg)
Clean up a tree encoder and return information about possible errors.
Definition: fs_tree.c:443
struct GNUNET_FS_TreeEncoder * GNUNET_FS_tree_encoder_create(struct GNUNET_FS_Handle *h, uint64_t size, void *cls, GNUNET_FS_DataReader reader, GNUNET_FS_TreeBlockProcessor proc, GNUNET_FS_TreeProgressCallback progress, GNUNET_SCHEDULER_TaskCallback cont)
Initialize a tree encoder.
Definition: fs_tree.c:269
uint64_t GNUNET_FS_tree_compute_tree_size(unsigned int depth)
Calculate how many bytes of payload a block tree of the given depth MAY correspond to at most (this f...
Definition: fs_tree.c:156
size_t GNUNET_FS_tree_calculate_block_size(uint64_t fsize, uint64_t offset, unsigned int depth)
Compute how many bytes of data should be stored in the specified block.
Definition: fs_tree.c:222
Merkle-tree-ish-CHK file encoding for GNUnet.
static int ret
Return value of the commandline.
Definition: gnunet-abd.c:81
static struct GNUNET_ARM_MonitorHandle * m
Monitor connection with ARM.
Definition: gnunet-arm.c:104
static struct GNUNET_ARM_Handle * h
Connection with ARM.
Definition: gnunet-arm.c:99
static struct GNUNET_CADET_MessageHandler handlers[]
Handlers, for diverse services.
static struct GNUNET_PEERINFO_Handle * pi
Handle to peerinfo service.
struct GNUNET_HashCode key
The key used in the DHT.
static unsigned int anonymity
static struct GNUNET_FS_DownloadContext * dc
static char * filename
static OpusEncoder * enc
OPUS encoder.
uint32_t data
The data value.
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
static char * value
Value of the record to add/remove.
static struct GNUNET_FS_Uri * uri
Value of URI provided on command-line (when not publishing a file but just creating UBlocks to refer ...
static struct GNUNET_CONTAINER_MetaData * meta
Meta-data provided via command-line option.
static char * plugin_name
Name of our plugin.
static char buf[2048]
static struct GNUNET_DISK_FileHandle * fh
File handle to STDIN, for reading restart/quit commands.
#define GNUNET_log(kind,...)
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:53
@ GNUNET_OK
Definition: gnunet_common.h:95
@ GNUNET_YES
Definition: gnunet_common.h:97
@ GNUNET_NO
Definition: gnunet_common.h:94
@ GNUNET_SYSERR
Definition: gnunet_common.h:93
#define GNUNET_MIN(a, b)
EXTRACTOR_MetaFormat
Format in which the extracted meta data is presented.
EXTRACTOR_MetaType
Enumeration defining various sources of keywords.
@ EXTRACTOR_METATYPE_GNUNET_FULL_DATA
GNUNET_BLOCK_Type
Blocks in the datastore and the datacache must have a unique type.
@ GNUNET_BLOCK_TYPE_FS_DBLOCK
Data block (leaf) in the CHK tree.
@ GNUNET_BLOCK_TYPE_FS_IBLOCK
Inner block in the CHK tree.
struct GNUNET_MQ_Handle * GNUNET_CLIENT_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *service_name, const struct GNUNET_MQ_MessageHandler *handlers, GNUNET_MQ_ErrorHandler error_handler, void *error_handler_cls)
Create a message queue to connect to a GNUnet service.
Definition: client.c:1064
ssize_t GNUNET_CRYPTO_symmetric_encrypt(const void *block, size_t size, const struct GNUNET_CRYPTO_SymmetricSessionKey *sessionkey, const struct GNUNET_CRYPTO_SymmetricInitializationVector *iv, void *result)
Encrypt a block using a symmetric sessionkey.
ssize_t GNUNET_CRYPTO_symmetric_decrypt(const void *block, size_t size, const struct GNUNET_CRYPTO_SymmetricSessionKey *sessionkey, const struct GNUNET_CRYPTO_SymmetricInitializationVector *iv, void *result)
Decrypt a given block using a symmetric sessionkey.
struct GNUNET_DISK_FileHandle * GNUNET_DISK_file_open(const char *fn, enum GNUNET_DISK_OpenFlags flags, enum GNUNET_DISK_AccessPermissions perm)
Open a file.
Definition: disk.c:1235
enum GNUNET_GenericReturnValue GNUNET_DISK_file_test(const char *fil)
Check that fil corresponds to a filename (of a file that exists and that is not a directory).
Definition: disk.c:482
char * GNUNET_DISK_mktemp(const char *t)
Create an (empty) temporary file on disk.
Definition: disk.c:381
ssize_t GNUNET_DISK_file_write(const struct GNUNET_DISK_FileHandle *h, const void *buffer, size_t n)
Write a buffer to a file.
Definition: disk.c:686
off_t GNUNET_DISK_file_seek(const struct GNUNET_DISK_FileHandle *h, off_t offset, enum GNUNET_DISK_Seek whence)
Move the read/write pointer in a file.
Definition: disk.c:206
enum GNUNET_GenericReturnValue GNUNET_DISK_file_size(const char *filename, uint64_t *size, int include_symbolic_links, int single_file_mode)
Get the size of the file (or directory) of the given file (in bytes).
Definition: disk.c:222
void * GNUNET_DISK_file_map(const struct GNUNET_DISK_FileHandle *h, struct GNUNET_DISK_MapHandle **m, enum GNUNET_DISK_MapType access, size_t len)
Map a file into memory.
Definition: disk.c:1378
enum GNUNET_GenericReturnValue GNUNET_DISK_file_close(struct GNUNET_DISK_FileHandle *h)
Close an open file.
Definition: disk.c:1306
enum GNUNET_GenericReturnValue GNUNET_DISK_directory_create_for_file(const char *filename)
Create the directory structure for storing a file.
Definition: disk.c:582
ssize_t GNUNET_DISK_file_read(const struct GNUNET_DISK_FileHandle *h, void *result, size_t len)
Read the contents of a binary file into a buffer.
Definition: disk.c:622
enum GNUNET_GenericReturnValue GNUNET_DISK_file_unmap(struct GNUNET_DISK_MapHandle *h)
Unmap a file.
Definition: disk.c:1409
@ GNUNET_DISK_OPEN_READ
Open the file for reading.
@ GNUNET_DISK_OPEN_TRUNCATE
Truncate file if it exists.
@ GNUNET_DISK_OPEN_CREATE
Create file if it doesn't exist.
@ GNUNET_DISK_OPEN_READWRITE
Open the file for both reading and writing.
@ GNUNET_DISK_PERM_USER_READ
Owner can read.
@ GNUNET_DISK_PERM_NONE
Nobody is allowed to do anything to the file.
@ GNUNET_DISK_PERM_GROUP_READ
Group can read.
@ GNUNET_DISK_PERM_USER_WRITE
Owner can write.
@ GNUNET_DISK_PERM_OTHER_READ
Everybody can read.
@ GNUNET_DISK_SEEK_SET
Seek an absolute position (from the start of the file).
@ GNUNET_DISK_MAP_TYPE_READ
Read-only memory map.
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
GNUNET_FS_DownloadOptions
Options for downloading.
int GNUNET_FS_directory_list_contents(size_t size, const void *data, uint64_t offset, GNUNET_FS_DirectoryEntryProcessor dep, void *dep_cls)
Iterate over all entries in a directory.
Definition: fs_directory.c:181
int GNUNET_FS_meta_data_test_for_directory(const struct GNUNET_CONTAINER_MetaData *md)
Does the meta-data claim that this is a directory? Checks if the mime-type is that of a GNUnet direct...
Definition: fs_directory.c:54
uint64_t GNUNET_FS_uri_chk_get_file_size(const struct GNUNET_FS_Uri *uri)
What is the size of the file that this URI refers to?
Definition: fs_uri.c:1370
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)
Download parts of a file.
Definition: fs_download.c:2145
int GNUNET_FS_uri_test_equal(const struct GNUNET_FS_Uri *u1, const struct GNUNET_FS_Uri *u2)
Test if two URIs are equal.
Definition: fs_uri.c:1211
int GNUNET_FS_uri_test_loc(const struct GNUNET_FS_Uri *uri)
Is this a location URI?
Definition: fs_uri.c:1394
void GNUNET_FS_download_resume(struct GNUNET_FS_DownloadContext *dc)
Resume a suspended download.
Definition: fs_download.c:2306
char * GNUNET_FS_uri_to_string(const struct GNUNET_FS_Uri *uri)
Convert a URI to a UTF-8 String.
Definition: fs_uri.c:2027
void GNUNET_FS_uri_destroy(struct GNUNET_FS_Uri *uri)
Free URI.
Definition: fs_uri.c:678
struct GNUNET_FS_Uri * GNUNET_FS_uri_dup(const struct GNUNET_FS_Uri *uri)
Duplicate URI.
Definition: fs_uri.c:997
void GNUNET_FS_download_stop(struct GNUNET_FS_DownloadContext *dc, int do_delete)
Stop a download (aborts if download is incomplete).
Definition: fs_download.c:2333
char * GNUNET_FS_meta_data_suggest_filename(const struct GNUNET_CONTAINER_MetaData *md)
Suggest a filename based on given metadata.
Definition: fs_misc.c:38
int GNUNET_FS_uri_test_chk(const struct GNUNET_FS_Uri *uri)
Is this a file (or directory) URI?
Definition: fs_uri.c:1356
#define GNUNET_FS_DIRECTORY_EXT
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)
Download parts of a file based on a search result.
Definition: fs_download.c:2216
void GNUNET_FS_download_suspend(struct GNUNET_FS_DownloadContext *dc)
Suspend a download.
Definition: fs_download.c:2294
int GNUNET_FS_uri_loc_get_peer_identity(const struct GNUNET_FS_Uri *uri, struct GNUNET_PeerIdentity *peer)
Obtain the identity of the peer offering the data.
Definition: fs_uri.c:822
@ GNUNET_FS_SEARCH_OPTION_LOOPBACK_ONLY
Only search the local host, do not search remote systems (no P2P)
@ GNUNET_FS_SEARCH_OPTION_NONE
No options (use defaults for everything).
@ GNUNET_FS_DOWNLOAD_IS_PROBE
Internal option used to flag this download as a 'probe' for a search result.
@ GNUNET_FS_DOWNLOAD_OPTION_RECURSIVE
Do a recursive download (that is, automatically trigger the download of files in directories).
@ GNUNET_FS_DOWNLOAD_OPTION_LOOPBACK_ONLY
Only download from the local host, do not access remote systems (no P2P)
@ GNUNET_FS_DOWNLOAD_NO_TEMPORARIES
Do not append temporary data to the target file (for the IBlocks).
@ GNUNET_FS_STATUS_DOWNLOAD_INACTIVE
Notification that this download is no longer actively being pursued (back in the queue).
@ GNUNET_FS_STATUS_DOWNLOAD_ERROR
Notification that this download encountered an error.
@ GNUNET_FS_STATUS_DOWNLOAD_COMPLETED
Notification that this download completed.
@ GNUNET_FS_STATUS_DOWNLOAD_SUSPEND
Notification that this download was suspended.
@ GNUNET_FS_STATUS_DOWNLOAD_START
Notification that we have started this download.
@ GNUNET_FS_STATUS_DOWNLOAD_PROGRESS
Notification about progress with this download.
@ GNUNET_FS_STATUS_DOWNLOAD_ACTIVE
Notification that this download is now actively being pursued (as opposed to waiting in the queue).
@ GNUNET_FS_STATUS_DOWNLOAD_STOPPED
Notification that this download was stopped (final event with respect to this action).
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:41
void GNUNET_CRYPTO_hash_to_aes_key(const struct GNUNET_HashCode *hc, struct GNUNET_CRYPTO_SymmetricSessionKey *skey, struct GNUNET_CRYPTO_SymmetricInitializationVector *iv)
Convert a hashcode into a key.
Definition: crypto_hash.c:146
int GNUNET_CONTAINER_multihashmap_get_multiple(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, GNUNET_CONTAINER_MulitHashMapIteratorCallback it, void *it_cls)
Iterate over all entries in the map that match a particular key.
int GNUNET_CONTAINER_multihashmap_contains_value(const struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, const void *value)
Check if the map contains the given value under the given key.
int GNUNET_CONTAINER_multihashmap_remove(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, const void *value)
Remove the given key-value pair from the map.
struct GNUNET_CONTAINER_MultiHashMap * GNUNET_CONTAINER_multihashmap_create(unsigned int len, int do_not_copy_keys)
Create a multi hash map.
int GNUNET_CONTAINER_multihashmap_put(struct GNUNET_CONTAINER_MultiHashMap *map, const struct GNUNET_HashCode *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
int GNUNET_CONTAINER_multihashmap_iterate(struct GNUNET_CONTAINER_MultiHashMap *map, GNUNET_CONTAINER_MulitHashMapIteratorCallback it, void *it_cls)
Iterate over all entries in the map.
void GNUNET_CONTAINER_multihashmap_destroy(struct GNUNET_CONTAINER_MultiHashMap *map)
Destroy a hash map.
@ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE
Allow multiple values with the same key.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
const char * GNUNET_h2s(const struct GNUNET_HashCode *hc)
Convert a hash value to a string (for printing debug messages).
#define GNUNET_log_strerror_file(level, cmd, filename)
Log an error message at log-level 'level' that indicates a failure of the command 'cmd' with the mess...
@ GNUNET_ERROR_TYPE_WARNING
@ GNUNET_ERROR_TYPE_ERROR
@ GNUNET_ERROR_TYPE_DEBUG
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_new_array(n, type)
Allocate a size n array with structs or unions of the given type.
#define GNUNET_free(ptr)
Wrapper around free.
int GNUNET_CONTAINER_meta_data_iterate(const struct GNUNET_CONTAINER_MetaData *md, EXTRACTOR_MetaDataProcessor iter, void *iter_cls)
Iterate over MD entries.
ssize_t GNUNET_CONTAINER_meta_data_get_serialized_size(const struct GNUNET_CONTAINER_MetaData *md)
Get the size of the full meta-data in serialized form.
void GNUNET_CONTAINER_meta_data_destroy(struct GNUNET_CONTAINER_MetaData *md)
Free meta data.
struct GNUNET_CONTAINER_MetaData * GNUNET_CONTAINER_meta_data_duplicate(const struct GNUNET_CONTAINER_MetaData *md)
Duplicate a MetaData token.
GNUNET_MQ_Error
Error codes for the queue.
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:355
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
void * cls
Closure for mv and cb.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
void GNUNET_MQ_destroy(struct GNUNET_MQ_Handle *mq)
Destroy the message queue.
Definition: mq.c:837
#define GNUNET_MESSAGE_TYPE_FS_START_SEARCH
Client asks FS service to start a (keyword) search.
#define GNUNET_MESSAGE_TYPE_FS_PUT
P2P response with content or active migration of content.
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_now(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run as soon as possible.
Definition: scheduler.c:1296
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:972
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1269
struct GNUNET_TIME_Relative GNUNET_TIME_absolute_get_duration(struct GNUNET_TIME_Absolute whence)
Get the duration of an operation as the difference of the current time and the given start time "henc...
Definition: time.c:263
#define GNUNET_TIME_UNIT_MILLISECONDS
One millisecond.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:86
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:542
#define GNUNET_TIME_UNIT_ZERO
Relative time zero.
const char * GNUNET_STRINGS_relative_time_to_string(struct GNUNET_TIME_Relative delta, int do_round)
Give relative time in human-readable fancy format.
Definition: strings.c:557
struct GNUNET_TIME_Relative GNUNET_TIME_calculate_eta(struct GNUNET_TIME_Absolute start, uint64_t finished, uint64_t total)
Calculate the estimate time of arrival/completion for an operation.
Definition: time.c:390
#define GNUNET_TIME_UNIT_FOREVER_ABS
Constant used to specify "forever".
#define GNUNET_TIME_STD_BACKOFF(r)
Perform our standard exponential back-off calculation, starting at 1 ms and then going by a factor of...
#define max(x, y)
static unsigned int size
Size of the "table".
Definition: peer.c:67
#define DIR_SEPARATOR_STR
Definition: platform.h:165
#define _(String)
GNU gettext support macro.
Definition: platform.h:177
Response from FS service with a result for a previous FS search.
Definition: fs.h:355
uint32_t respect_offered
How much respect did we offer (in total) before getting an answer (estimate).
Definition: fs.h:387
uint32_t type
Type of the block (in big endian).
Definition: fs.h:364
struct GNUNET_MessageHeader header
Message type will be GNUNET_MESSAGE_TYPE_FS_PUT.
Definition: fs.h:359
struct GNUNET_TIME_AbsoluteNBO last_transmission
When was the last time we've tried to download this block? (FOREVER if unknown/not relevant)
Definition: fs.h:375
uint32_t num_transmissions
How often did we transmit this query before getting an answer (estimate).
Definition: fs.h:381
content hash key
Definition: fs.h:54
struct GNUNET_HashCode key
Hash of the original content, used for encryption.
Definition: fs.h:58
struct GNUNET_HashCode query
Hash of the encrypted content, used for querying.
Definition: fs.h:63
Information about an active download request.
Definition: fs_api.h:1675
struct DownloadRequest ** children
Array (!) of child-requests, or NULL for the bottom of the tree.
Definition: fs_api.h:1684
unsigned int chk_idx
Offset of the CHK for this block in the parent block.
Definition: fs_api.h:1712
unsigned int num_children
Number of entries in children array.
Definition: fs_api.h:1702
uint64_t offset
Offset of the corresponding block.
Definition: fs_api.h:1697
enum BlockRequestState state
State in the FSM.
Definition: fs_api.h:1717
unsigned int depth
Depth of the corresponding block in the tree.
Definition: fs_api.h:1707
struct DownloadRequest * parent
Parent in the CHK-tree.
Definition: fs_api.h:1679
struct ContentHashKey chk
CHK for the request for this block (set during reconstruction to what we have on disk,...
Definition: fs_api.h:1690
struct ContentHashKey chk
Query and key of the top GNUNET_EC_IBlock.
Definition: fs_api.h:103
uint64_t file_length
Total size of the file in bytes.
Definition: fs_api.h:98
Meta data to associate with a file, directory or namespace.
Handle used to access files (and pipes).
Handle for a memory-mapping operation.
Definition: disk.c:1359
Context for controlling a download.
Definition: fs_api.h:1743
int has_finished
Flag set upon transitive completion (includes child downloads).
Definition: fs_api.h:1929
unsigned int treedepth
The depth of the file-tree.
Definition: fs_api.h:1917
char * filename
Where are we writing the data (name of the file, can be NULL!).
Definition: fs_api.h:1821
struct GNUNET_FS_Uri * uri
URI that identifies the file that we are downloading.
Definition: fs_api.h:1799
struct GNUNET_DISK_FileHandle * rfh
File handle for reading data from an existing file (to pass to tree encoder).
Definition: fs_api.h:1844
void * client_info
Context kept for the client.
Definition: fs_api.h:1794
uint64_t old_file_size
What was the size of the file on disk that we're downloading before we started? Used to detect if the...
Definition: fs_api.h:1897
int issue_requests
Are we ready to issue requests (reconstructions are finished)?
Definition: fs_api.h:1934
uint64_t completed
How many bytes have we already received within the specified range (DBlocks only).
Definition: fs_api.h:1889
uint64_t offset
What is the first offset that we're interested in?
Definition: fs_api.h:1877
struct GNUNET_FS_QueueEntry * job_queue
Our entry in the job queue.
Definition: fs_api.h:1833
char * emsg
Error message, NULL if we're doing OK.
Definition: fs_api.h:1809
struct GNUNET_SCHEDULER_Task * task
ID of a task that is using this struct and that must be cancelled when the download is being stopped ...
Definition: fs_api.h:1871
struct GNUNET_FS_TreeEncoder * te
Tree encoder used for the reconstruction.
Definition: fs_api.h:1838
struct GNUNET_FS_SearchResult * search
Associated search (used when downloading files based on search results), or NULL for none.
Definition: fs_api.h:1769
struct GNUNET_FS_DownloadContext * child_tail
Tail of list of child downloads.
Definition: fs_api.h:1779
struct GNUNET_CONTAINER_MultiHashMap * active
Map of active requests (those waiting for a response).
Definition: fs_api.h:1850
struct GNUNET_FS_DownloadContext * child_head
Head of list of child downloads.
Definition: fs_api.h:1774
struct GNUNET_TIME_Relative reconnect_backoff
How long to wait before we try to reconnect to FS service?
Definition: fs_api.h:1907
uint64_t length
How many bytes starting from offset are desired? This is NOT the overall length of the file!
Definition: fs_api.h:1883
char * serialization
Random portion of filename we use for syncing state of this download.
Definition: fs_api.h:1815
struct GNUNET_MQ_Handle * mq
Connection to the FS service.
Definition: fs_api.h:1757
uint32_t anonymity
Desired level of anonymity.
Definition: fs_api.h:1912
char * temp_filename
Where are we writing the data temporarily (name of the file, can be NULL!); used if we do not have a ...
Definition: fs_api.h:1828
struct GNUNET_FS_DownloadContext * next
Next download belonging to the same parent.
Definition: fs_api.h:1789
struct GNUNET_FS_DownloadContext * parent
Parent download (used when downloading files in directories).
Definition: fs_api.h:1763
struct DownloadRequest * top_request
Top-level download request.
Definition: fs_api.h:1855
struct GNUNET_PeerIdentity target
Identity of the peer having the content, or all-zeros if we don't know of such a peer.
Definition: fs_api.h:1861
struct GNUNET_CONTAINER_MetaData * meta
Known meta-data for the file (can be NULL).
Definition: fs_api.h:1804
enum GNUNET_FS_DownloadOptions options
Options for the download.
Definition: fs_api.h:1922
struct GNUNET_FS_Handle * h
Global FS context.
Definition: fs_api.h:1747
struct GNUNET_TIME_Absolute start_time
Time download was started.
Definition: fs_api.h:1902
struct TopLevelActivity * top
Our top-level activity entry (if we are top-level, otherwise NULL).
Definition: fs_api.h:1752
Master context for most FS operations.
Definition: fs_api.h:1069
void * upcb_cls
Closure for upcb.
Definition: fs_api.h:1088
GNUNET_FS_ProgressCallback upcb
Function to call with updates on our progress.
Definition: fs_api.h:1083
const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration to use.
Definition: fs_api.h:1073
Argument given to the progress callback with information about what is going on.
Information we store for each search result.
Definition: fs_api.h:498
struct GNUNET_FS_DownloadContext * download
ID of an associated download based on this search result (or NULL for none).
Definition: fs_api.h:545
void * client_info
Client info for this search result.
Definition: fs_api.h:533
struct GNUNET_FS_DownloadContext * probe_ctx
ID of a job that is currently probing this results' availability (NULL if we are not currently probin...
Definition: fs_api.h:539
struct GNUNET_FS_Uri * uri
URI to which this search result refers to.
Definition: fs_api.h:523
struct GNUNET_CONTAINER_MetaData * meta
Metadata for the search result.
Definition: fs_api.h:528
A Universal Resource Identifier (URI), opaque.
Definition: fs_api.h:166
union GNUNET_FS_Uri::@13 data
enum GNUNET_FS_UriType type
Type of the URI.
Definition: fs_api.h:170
struct Location loc
Information needed to retrieve a file including signed location (identity of a peer) of the content.
Definition: fs_api.h:217
struct FileIdentifier chk
Information needed to retrieve a file (content-hash-key plus file size).
Definition: fs_api.h:211
A 512-bit hashcode.
Message handler for a specific message type.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format.
Time for absolute times used by GNUnet, in microseconds.
uint64_t abs_value_us
The actual value.
uint64_t rel_value_us
The actual value.
struct FileIdentifier fi
Information about the shared file.
Definition: fs_api.h:116
Closure for iterator processing results.
Definition: fs_download.c:135
uint32_t respect_offered
how much respect did we offer to get this reply?
Definition: fs_download.c:174
size_t size
Number of bytes in data.
Definition: fs_download.c:159
int do_store
Flag to indicate if this block should be stored on disk.
Definition: fs_download.c:169
struct GNUNET_FS_DownloadContext * dc
Our download context.
Definition: fs_download.c:149
struct GNUNET_TIME_Absolute last_transmission
When did we last transmit the request?
Definition: fs_download.c:154
const void * data
Data found in P2P network.
Definition: fs_download.c:144
uint32_t num_transmissions
how often did we transmit the query?
Definition: fs_download.c:179
enum GNUNET_BLOCK_Type type
Type of data.
Definition: fs_download.c:164
struct GNUNET_HashCode query
Hash of data.
Definition: fs_download.c:139
Message sent from a GNUnet (fs) search activity to the gnunet-service-fs to start a search.
Definition: fs.h:269
struct GNUNET_PeerIdentity target
If the request is for a DBLOCK or IBLOCK, this is the identity of the peer that is known to have a re...
Definition: fs.h:306
uint32_t type
Type of the content that we're looking for.
Definition: fs.h:289
struct GNUNET_HashCode query
Hash of the public key for UBLOCKs; Hash of the CHK-encoded block for DBLOCKS and IBLOCKS.
Definition: fs.h:312
uint32_t anonymity_level
Desired anonymity level, big-endian.
Definition: fs.h:294
uint32_t options
Bitmask with options.
Definition: fs.h:284
enum GNUNET_TESTBED_UnderlayLinkModelType type
the type of this model