GNUnet  0.17.6
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 
1007 static int
1009  const struct GNUNET_HashCode *key,
1010  void *value)
1011 {
1012  struct ProcessResultClosure *prc = cls;
1013  struct DownloadRequest *dr = value;
1014  struct GNUNET_FS_DownloadContext *dc = prc->dc;
1015  struct DownloadRequest *drc;
1016  struct GNUNET_DISK_FileHandle *fh = NULL;
1019  char pt[prc->size];
1020  struct GNUNET_FS_ProgressInfo pi;
1021  uint64_t off;
1022  size_t bs;
1023  size_t app;
1024  int i;
1025  struct ContentHashKey *chkarr;
1026 
1027  GNUNET_log (
1029  "Received %u byte block `%s' matching pending request at depth %u and offset %llu/%llu\n",
1030  (unsigned int) prc->size,
1031  GNUNET_h2s (key),
1032  dr->depth,
1033  (unsigned long long) dr->offset,
1034  (unsigned long long) GNUNET_ntohll (dc->uri->data.chk.file_length));
1036  dc->uri->data.chk.file_length),
1037  dr->offset,
1038  dr->depth);
1039  if (prc->size != bs)
1040  {
1041  GNUNET_asprintf (
1042  &dc->emsg,
1043  _ (
1044  "Internal error or bogus download URI (expected %lu bytes at depth %u and offset %llu/%llu, got %lu bytes)"),
1045  bs,
1046  dr->depth,
1047  (unsigned long long) dr->offset,
1048  (unsigned long long) GNUNET_ntohll (dc->uri->data.chk.file_length),
1049  prc->size);
1051  while (NULL != dr->parent)
1052  {
1053  dr->state = BRS_ERROR;
1054  dr = dr->parent;
1055  }
1056  dr->state = BRS_ERROR;
1057  goto signal_error;
1058  }
1059 
1060  (void) GNUNET_CONTAINER_multihashmap_remove (dc->active, &prc->query, dr);
1061  GNUNET_CRYPTO_hash_to_aes_key (&dr->chk.key, &skey, &iv);
1062  if (-1 ==
1063  GNUNET_CRYPTO_symmetric_decrypt (prc->data, prc->size, &skey, &iv, pt))
1064  {
1065  GNUNET_break (0);
1066  dc->emsg = GNUNET_strdup (_ ("internal error decrypting content"));
1067  goto signal_error;
1068  }
1070  dr->offset,
1071  dr->depth);
1072  /* save to disk */
1073  if ((GNUNET_YES == prc->do_store) &&
1074  ((NULL != dc->filename) || (is_recursive_download (dc))) &&
1075  ((dr->depth == dc->treedepth) ||
1077  {
1079  : dc->temp_filename,
1086  if (NULL == fh)
1087  {
1088  GNUNET_asprintf (&dc->emsg,
1089  _ ("Download failed: could not open file `%s': %s"),
1090  dc->filename,
1091  strerror (errno));
1092  goto signal_error;
1093  }
1095  "Saving decrypted block to disk at offset %llu\n",
1096  (unsigned long long) off);
1097  if ((off != GNUNET_DISK_file_seek (fh, off, GNUNET_DISK_SEEK_SET)))
1098  {
1099  GNUNET_asprintf (&dc->emsg,
1100  _ ("Failed to seek to offset %llu in file `%s': %s"),
1101  (unsigned long long) off,
1102  dc->filename,
1103  strerror (errno));
1104  goto signal_error;
1105  }
1106  if (prc->size != GNUNET_DISK_file_write (fh, pt, prc->size))
1107  {
1108  GNUNET_asprintf (
1109  &dc->emsg,
1110  _ ("Failed to write block of %u bytes at offset %llu in file `%s': %s"),
1111  (unsigned int) prc->size,
1112  (unsigned long long) off,
1113  dc->filename,
1114  strerror (errno));
1115  goto signal_error;
1116  }
1118  fh = NULL;
1119  }
1120 
1121  if (0 == dr->depth)
1122  {
1123  /* DBLOCK, update progress and try recursion if applicable */
1124  app = prc->size;
1125  if (dr->offset < dc->offset)
1126  {
1127  /* starting offset begins in the middle of pt,
1128  * do not count first bytes as progress */
1129  GNUNET_assert (app > (dc->offset - dr->offset));
1130  app -= (dc->offset - dr->offset);
1131  }
1132  if (dr->offset + prc->size > dc->offset + dc->length)
1133  {
1134  /* end of block is after relevant range,
1135  * do not count last bytes as progress */
1136  GNUNET_assert (app >
1137  (dr->offset + prc->size) - (dc->offset + dc->length));
1138  app -= (dr->offset + prc->size) - (dc->offset + dc->length);
1139  }
1140  dc->completed += app;
1141 
1142  /* do recursive download if option is set and either meta data
1143  * says it is a directory or if no meta data is given AND filename
1144  * ends in '.gnd' (top-level case) */
1145  if (is_recursive_download (dc))
1147  pt,
1148  off,
1150  dc);
1151  }
1153  dr->state = BRS_DOWNLOAD_DOWN;
1155  pi.value.download.specifics.progress.data = pt;
1156  pi.value.download.specifics.progress.offset = dr->offset;
1157  pi.value.download.specifics.progress.data_len = prc->size;
1158  pi.value.download.specifics.progress.depth = dr->depth;
1159  pi.value.download.specifics.progress.respect_offered = prc->respect_offered;
1160  pi.value.download.specifics.progress.num_transmissions =
1161  prc->num_transmissions;
1162  if (prc->last_transmission.abs_value_us !=
1163  GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us)
1164  pi.value.download.specifics.progress.block_download_duration =
1166  else
1167  pi.value.download.specifics.progress.block_download_duration =
1168  GNUNET_TIME_UNIT_ZERO; /* found locally */
1170  if (0 == dr->depth)
1171  propagate_up (dr);
1172 
1173  if (dc->completed == dc->length)
1174  {
1175  /* download completed, signal */
1177  "Download completed, truncating file to desired length %llu\n",
1178  (unsigned long long) GNUNET_ntohll (
1179  dc->uri->data.chk.file_length));
1180  /* truncate file to size (since we store IBlocks at the end) */
1181  if (NULL != dc->filename)
1182  {
1183  if (0 != truncate (dc->filename,
1186  "truncate",
1187  dc->filename);
1188  }
1189  GNUNET_assert (0 == dr->depth);
1190  check_completed (dc);
1191  }
1192  if (0 == dr->depth)
1193  {
1194  /* bottom of the tree, no child downloads possible, just sync */
1196  return GNUNET_YES;
1197  }
1198 
1199  GNUNET_log (
1201  "Triggering downloads of children (this block was at depth %u and offset %llu)\n",
1202  dr->depth,
1203  (unsigned long long) dr->offset);
1204  GNUNET_assert (0 == (prc->size % sizeof(struct ContentHashKey)));
1205  chkarr = (struct ContentHashKey *) pt;
1206  for (i = dr->num_children - 1; i >= 0; i--)
1207  {
1208  drc = dr->children[i];
1209  switch (drc->state)
1210  {
1211  case BRS_INIT:
1212  if ((drc->chk_idx + 1) * sizeof(struct ContentHashKey) > prc->size)
1213  {
1214  /* 'chkarr' does not have enough space for this chk_idx;
1215  internal error! */
1216  GNUNET_break (0);
1217  GNUNET_assert (0);
1218  dc->emsg = GNUNET_strdup (_ ("internal error decoding tree"));
1219  goto signal_error;
1220  }
1221  drc->chk = chkarr[drc->chk_idx];
1222  drc->state = BRS_CHK_SET;
1223  if (GNUNET_YES == dc->issue_requests)
1224  schedule_block_download (dc, drc);
1225  break;
1226 
1227  case BRS_RECONSTRUCT_DOWN:
1228  GNUNET_assert (0);
1229  break;
1230 
1232  GNUNET_assert (0);
1233  break;
1234 
1235  case BRS_RECONSTRUCT_UP:
1236  GNUNET_assert (0);
1237  break;
1238 
1239  case BRS_CHK_SET:
1240  GNUNET_assert (0);
1241  break;
1242 
1243  case BRS_DOWNLOAD_DOWN:
1244  GNUNET_assert (0);
1245  break;
1246 
1247  case BRS_DOWNLOAD_UP:
1248  GNUNET_assert (0);
1249  break;
1250 
1251  case BRS_ERROR:
1252  GNUNET_assert (0);
1253  break;
1254 
1255  default:
1256  GNUNET_assert (0);
1257  break;
1258  }
1259  }
1261  return GNUNET_YES;
1262 
1263 signal_error:
1264  if (NULL != fh)
1267  pi.value.download.specifics.error.message = dc->emsg;
1269  GNUNET_MQ_destroy (dc->mq);
1270  dc->mq = NULL;
1272  dc->top_request = NULL;
1273  if (NULL != dc->job_queue)
1274  {
1276  dc->job_queue = NULL;
1277  }
1279  return GNUNET_NO;
1280 }
1281 
1282 
1290 static int
1291 check_put (void *cls, const struct ClientPutMessage *cm)
1292 {
1293  /* any varsize length is OK */
1294  return GNUNET_OK;
1295 }
1296 
1297 
1305 static void
1306 handle_put (void *cls, const struct ClientPutMessage *cm)
1307 {
1308  struct GNUNET_FS_DownloadContext *dc = cls;
1309  uint16_t msize = ntohs (cm->header.size) - sizeof(*cm);
1310  struct ProcessResultClosure prc;
1311 
1312  prc.dc = dc;
1313  prc.data = &cm[1];
1315  prc.size = msize;
1316  prc.type = ntohl (cm->type);
1317  prc.do_store = GNUNET_YES;
1318  prc.respect_offered = ntohl (cm->respect_offered);
1319  prc.num_transmissions = ntohl (cm->num_transmissions);
1320  GNUNET_CRYPTO_hash (prc.data, msize, &prc.query);
1322  "Received result for query `%s' from FS service\n",
1323  GNUNET_h2s (&prc.query));
1325  &prc.query,
1327  &prc);
1328 }
1329 
1330 
1339 static void
1341 {
1342  struct GNUNET_FS_DownloadContext *dc = cls;
1343 
1344  if (NULL != dc->mq)
1345  {
1346  GNUNET_MQ_destroy (dc->mq);
1347  dc->mq = NULL;
1348  }
1350  "Transmitting download request failed, trying to reconnect\n");
1351  try_reconnect (dc);
1352 }
1353 
1354 
1360 static void
1361 do_reconnect (void *cls)
1362 {
1363  struct GNUNET_FS_DownloadContext *dc = cls;
1365  { GNUNET_MQ_hd_var_size (put,
1367  struct ClientPutMessage,
1368  dc),
1369  GNUNET_MQ_handler_end () };
1370 
1371  dc->task = NULL;
1373  "fs",
1374  handlers,
1376  dc);
1377  if (NULL == dc->mq)
1378  {
1380  "Connecting to `%s'-service failed, will try again.\n",
1381  "FS");
1382  try_reconnect (dc);
1383  return;
1384  }
1386 }
1387 
1388 
1396 static void
1398 {
1399  if (NULL != dc->mq)
1400  {
1402  "Moving all requests back to pending list\n");
1403  GNUNET_MQ_destroy (dc->mq);
1404  dc->mq = NULL;
1405  }
1406  if (0 == dc->reconnect_backoff.rel_value_us)
1408  else
1410 
1412  "Will try to reconnect in %s\n",
1414  GNUNET_YES));
1415  GNUNET_break (NULL != dc->job_queue);
1416  dc->task =
1418 }
1419 
1420 
1427 static void
1429 {
1430  struct GNUNET_FS_DownloadContext *dc = cls;
1431  struct GNUNET_FS_ProgressInfo pi;
1432 
1433  GNUNET_assert (NULL == dc->mq);
1434  GNUNET_assert (NULL != dc->active);
1435  do_reconnect (dc);
1436  if (NULL != dc->mq)
1437  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Download activated\n");
1440 }
1441 
1442 
1448 static void
1450 {
1451  struct GNUNET_FS_DownloadContext *dc = cls;
1452  struct GNUNET_FS_ProgressInfo pi;
1453 
1454  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Download deactivated\n");
1455  if (NULL != dc->mq)
1456  {
1457  GNUNET_MQ_destroy (dc->mq);
1458  dc->mq = NULL;
1459  }
1462 }
1463 
1464 
1484 static struct DownloadRequest *
1486  unsigned int chk_idx,
1487  unsigned int depth,
1488  uint64_t dr_offset,
1489  uint64_t file_start_offset,
1490  uint64_t desired_length)
1491 {
1492  struct DownloadRequest *dr;
1493  unsigned int i;
1494  unsigned int head_skip;
1495  uint64_t child_block_size;
1496 
1497  dr = GNUNET_new (struct DownloadRequest);
1498  dr->parent = parent;
1499  dr->depth = depth;
1500  dr->offset = dr_offset;
1501  dr->chk_idx = chk_idx;
1502  if (0 == depth)
1503  return dr;
1504  child_block_size = GNUNET_FS_tree_compute_tree_size (depth - 1);
1505 
1506  /* calculate how many blocks at this level are not interesting
1507  * from the start (rounded down), either because of the requested
1508  * file offset or because this IBlock is further along */
1509  if (dr_offset < file_start_offset)
1510  {
1511  head_skip = (file_start_offset - dr_offset) / child_block_size;
1512  }
1513  else
1514  {
1515  head_skip = 0;
1516  }
1517 
1518  /* calculate index of last block at this level that is interesting (rounded up) */
1519  dr->num_children =
1520  (file_start_offset + desired_length - dr_offset) / child_block_size;
1521  if (dr->num_children * child_block_size <
1522  file_start_offset + desired_length - dr_offset)
1523  dr->num_children++; /* round up */
1524  GNUNET_assert (dr->num_children > head_skip);
1525  dr->num_children -= head_skip;
1526  if (dr->num_children > CHK_PER_INODE)
1527  dr->num_children = CHK_PER_INODE; /* cap at max */
1529  "Block at offset %llu and depth %u has %u children\n",
1530  (unsigned long long) dr_offset,
1531  depth,
1532  dr->num_children);
1533 
1534  /* now we can get the total number of *interesting* children for this block */
1535 
1536  /* why else would we have gotten here to begin with? (that'd be a bad logic error) */
1537  GNUNET_assert (dr->num_children > 0);
1538 
1539  dr->children = GNUNET_new_array (dr->num_children, struct DownloadRequest *);
1540  for (i = 0; i < dr->num_children; i++)
1541  {
1542  dr->children[i] =
1544  i + head_skip,
1545  depth - 1,
1546  dr_offset + (i + head_skip) * child_block_size,
1547  file_start_offset,
1548  desired_length);
1549  }
1550  return dr;
1551 }
1552 
1553 
1560 static void
1561 reconstruct_cont (void *cls)
1562 {
1563  struct GNUNET_FS_DownloadContext *dc = cls;
1564 
1565  /* clean up state from tree encoder */
1566  if (NULL != dc->task)
1567  {
1569  dc->task = NULL;
1570  }
1571  if (NULL != dc->rfh)
1572  {
1574  dc->rfh = NULL;
1575  }
1576  /* start "normal" download */
1578  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting normal download\n");
1580 }
1581 
1582 
1588 static void
1589 get_next_block (void *cls)
1590 {
1591  struct GNUNET_FS_DownloadContext *dc = cls;
1592 
1593  dc->task = NULL;
1595 }
1596 
1597 
1615 static void
1616 reconstruct_cb (void *cls,
1617  const struct ContentHashKey *chk,
1618  uint64_t offset,
1619  unsigned int depth,
1620  enum GNUNET_BLOCK_Type type,
1621  const void *block,
1622  uint16_t block_size)
1623 {
1624  struct GNUNET_FS_DownloadContext *dc = cls;
1625  struct GNUNET_FS_ProgressInfo pi;
1626  struct DownloadRequest *dr;
1627  uint64_t blen;
1628  unsigned int chld;
1629 
1630  /* find corresponding request entry */
1631  dr = dc->top_request;
1632  while (dr->depth > depth)
1633  {
1634  GNUNET_assert (dr->num_children > 0);
1635  blen = GNUNET_FS_tree_compute_tree_size (dr->depth - 1);
1636  chld = (offset - dr->offset) / blen;
1637  if (chld < dr->children[0]->chk_idx)
1638  {
1640  "Block %u < %u irrelevant for our range\n",
1641  chld,
1642  dr->children[0]->chk_idx);
1644  return; /* irrelevant block */
1645  }
1646  if (chld > dr->children[dr->num_children - 1]->chk_idx)
1647  {
1649  "Block %u > %u irrelevant for our range\n",
1650  chld,
1651  dr->children[dr->num_children - 1]->chk_idx);
1653  return; /* irrelevant block */
1654  }
1655  dr = dr->children[chld - dr->children[0]->chk_idx];
1656  }
1657  GNUNET_log (
1659  "Matched TE block with request at offset %llu and depth %u in state %d\n",
1660  (unsigned long long) dr->offset,
1661  dr->depth,
1662  dr->state);
1663  /* FIXME: this code needs more testing and might
1664  need to handle more states... */
1665  switch (dr->state)
1666  {
1667  case BRS_INIT:
1668  break;
1669 
1670  case BRS_RECONSTRUCT_DOWN:
1671  break;
1672 
1674  break;
1675 
1676  case BRS_RECONSTRUCT_UP:
1677  break;
1678 
1679  case BRS_CHK_SET:
1680  if (0 == memcmp (chk, &dr->chk, sizeof(struct ContentHashKey)))
1681  {
1682  GNUNET_log (
1684  "Reconstruction succeeded, can use block at offset %llu, depth %u\n",
1685  (unsigned long long) offset,
1686  depth);
1687  /* block matches, hence tree below matches;
1688  * this request is done! */
1689  dr->state = BRS_DOWNLOAD_UP;
1691  &dr->chk.query,
1692  dr);
1693  /* calculate how many bytes of payload this block
1694  * corresponds to */
1696  /* how many of those bytes are in the requested range? */
1697  blen = GNUNET_MIN (blen, dc->length + dc->offset - dr->offset);
1698  /* signal progress */
1699  dc->completed += blen;
1701  pi.value.download.specifics.progress.data = NULL;
1702  pi.value.download.specifics.progress.offset = offset;
1703  pi.value.download.specifics.progress.data_len = 0;
1704  pi.value.download.specifics.progress.depth = 0;
1705  pi.value.download.specifics.progress.respect_offered = 0;
1706  pi.value.download.specifics.progress.block_download_duration =
1709  /* FIXME: duplicated code from 'process_result_with_request - refactor */
1710  if (dc->completed == dc->length)
1711  {
1712  /* download completed, signal */
1714  "Download completed, truncating file to desired length %llu\n",
1715  (unsigned long long) GNUNET_ntohll (
1716  dc->uri->data.chk.file_length));
1717  /* truncate file to size (since we store IBlocks at the end) */
1718  if (NULL != dc->filename)
1719  {
1720  if (0 != truncate (dc->filename,
1723  "truncate",
1724  dc->filename);
1725  }
1726  }
1727  }
1728  else
1729  GNUNET_log (
1731  "Reconstruction failed, need to download block at offset %llu, depth %u\n",
1732  (unsigned long long) offset,
1733  depth);
1734  break;
1735 
1736  case BRS_DOWNLOAD_DOWN:
1737  break;
1738 
1739  case BRS_DOWNLOAD_UP:
1740  break;
1741 
1742  case BRS_ERROR:
1743  break;
1744 
1745  default:
1746  GNUNET_assert (0);
1747  break;
1748  }
1750  if ((dr == dc->top_request) && (dr->state == BRS_DOWNLOAD_UP))
1751  check_completed (dc);
1752 }
1753 
1754 
1767 static size_t
1768 fh_reader (void *cls, uint64_t offset, size_t max, void *buf, char **emsg)
1769 {
1770  struct GNUNET_FS_DownloadContext *dc = cls;
1771  struct GNUNET_DISK_FileHandle *fh = dc->rfh;
1772  ssize_t ret;
1773 
1774  if (NULL != emsg)
1775  *emsg = NULL;
1776  if (offset != GNUNET_DISK_file_seek (fh, offset, GNUNET_DISK_SEEK_SET))
1777  {
1778  if (NULL != emsg)
1779  *emsg = GNUNET_strdup (strerror (errno));
1780  return 0;
1781  }
1783  if (ret < 0)
1784  {
1785  if (NULL != emsg)
1786  *emsg = GNUNET_strdup (strerror (errno));
1787  return 0;
1788  }
1789  return ret;
1790 }
1791 
1792 
1799 void
1801 {
1802  struct GNUNET_FS_DownloadContext *dc = cls;
1803  struct GNUNET_FS_ProgressInfo pi;
1804  struct GNUNET_DISK_FileHandle *fh;
1805 
1806  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Start task running...\n");
1807  dc->task = NULL;
1808  if (0 == dc->length)
1809  {
1810  /* no bytes required! */
1811  if (NULL != dc->filename)
1812  {
1816  | ((0 ==
1819  : 0),
1825  }
1828  pi.value.download.specifics.start.meta = dc->meta;
1830  check_completed (dc);
1831  return;
1832  }
1833  if (NULL != dc->emsg)
1834  return;
1835  if (NULL == dc->top_request)
1836  {
1838  0,
1839  dc->treedepth - 1,
1840  0,
1841  dc->offset,
1842  dc->length);
1845  ? dc->uri->data.chk.chk
1846  : dc->uri->data.loc.fi.chk;
1847  /* signal start */
1849  if (NULL != dc->search)
1852  pi.value.download.specifics.start.meta = dc->meta;
1854  }
1856  /* attempt reconstruction from disk */
1861  if (dc->top_request->state == BRS_CHK_SET)
1862  {
1863  if (NULL != dc->rfh)
1864  {
1865  /* first, try top-down */
1867  "Trying top-down reconstruction for `%s'\n",
1868  dc->filename);
1870  switch (dc->top_request->state)
1871  {
1872  case BRS_CHK_SET:
1873  break; /* normal */
1874 
1875  case BRS_DOWNLOAD_DOWN:
1876  break; /* normal, some blocks already down */
1877 
1878  case BRS_DOWNLOAD_UP:
1879  /* already done entirely, party! */
1880  if (NULL != dc->rfh)
1881  {
1882  /* avoid hanging on to file handle longer than
1883  * necessary */
1885  dc->rfh = NULL;
1886  }
1887  return;
1888 
1889  case BRS_ERROR:
1890  GNUNET_asprintf (&dc->emsg, _ ("Invalid URI"));
1893  pi.value.download.specifics.error.message = dc->emsg;
1895  return;
1896 
1897  default:
1898  GNUNET_assert (0);
1899  break;
1900  }
1901  }
1902  }
1903  /* attempt reconstruction from meta data */
1905  (NULL != dc->meta))
1906  {
1907  GNUNET_log (
1909  "Trying to find embedded meta data for download of size %llu with %u bytes MD\n",
1910  (unsigned long long) GNUNET_FS_uri_chk_get_file_size (dc->uri),
1914  {
1915  if (NULL != dc->rfh)
1916  {
1917  /* avoid hanging on to file handle longer than
1918  * necessary */
1920  dc->rfh = NULL;
1921  }
1922  return; /* finished, status update was already done for us */
1923  }
1924  }
1925  if (NULL != dc->rfh)
1926  {
1927  /* finally, actually run bottom-up */
1929  "Trying bottom-up reconstruction of file `%s'\n",
1930  dc->filename);
1931  dc->te =
1934  dc,
1935  &fh_reader,
1936  &reconstruct_cb,
1937  NULL,
1938  &reconstruct_cont);
1940  }
1941  else
1942  {
1943  /* simple, top-level download */
1946  }
1948  check_completed (dc);
1949 }
1950 
1951 
1952 void
1954 {
1955  struct GNUNET_FS_DownloadContext *dc = cls;
1956  struct GNUNET_FS_ProgressInfo pi;
1957 
1958  if (NULL != dc->top)
1959  GNUNET_FS_end_top (dc->h, dc->top);
1960  while (NULL != dc->child_head)
1962  if (NULL != dc->search)
1963  {
1964  dc->search->download = NULL;
1965  dc->search = NULL;
1966  }
1967  if (NULL != dc->job_queue)
1968  {
1970  dc->job_queue = NULL;
1971  }
1972  if (NULL != dc->parent)
1974  dc->parent->child_tail,
1975  dc);
1976  if (NULL != dc->task)
1977  {
1979  dc->task = NULL;
1980  }
1983  if (NULL != dc->te)
1984  {
1986  dc->te = NULL;
1987  }
1988  if (NULL != dc->rfh)
1989  {
1991  dc->rfh = NULL;
1992  }
1994  if (NULL != dc->active)
1995  {
1997  dc->active = NULL;
1998  }
1999  GNUNET_free (dc->filename);
2004  GNUNET_assert (NULL == dc->job_queue);
2005  GNUNET_free (dc);
2006 }
2007 
2008 
2030  const struct GNUNET_FS_Uri *uri,
2031  const struct GNUNET_CONTAINER_MetaData *meta,
2032  const char *filename,
2033  const char *tempname,
2034  uint64_t offset,
2035  uint64_t length,
2036  uint32_t anonymity,
2038  void *cctx)
2039 {
2040  struct GNUNET_FS_DownloadContext *dc;
2041 
2043  if ((offset + length < offset) ||
2045  {
2046  GNUNET_break (0);
2047  return NULL;
2048  }
2051  "Starting download %p, %u bytes at offset %llu\n",
2052  dc,
2053  (unsigned int) length,
2054  (unsigned long long) offset);
2055  dc->h = h;
2056  dc->uri = GNUNET_FS_uri_dup (uri);
2058  dc->client_info = cctx;
2060  if (NULL != filename)
2061  {
2065  &dc->old_file_size,
2066  GNUNET_YES,
2067  GNUNET_YES));
2068  }
2069  if (GNUNET_FS_uri_test_loc (dc->uri))
2072  dc->offset = offset;
2073  dc->length = length;
2074  dc->anonymity = anonymity;
2075  dc->options = options;
2076  dc->active =
2078  GNUNET_NO);
2079  dc->treedepth =
2081  if ((NULL == filename) && (is_recursive_download (dc)))
2082  {
2083  if (NULL != tempname)
2084  dc->temp_filename = GNUNET_strdup (tempname);
2085  else
2086  dc->temp_filename = GNUNET_DISK_mktemp ("gnunet-directory-download-tmp");
2087  }
2089  "Starting download `%s' of %llu bytes with tree depth %u\n",
2090  filename,
2091  (unsigned long long) length,
2092  dc->treedepth);
2093  GNUNET_assert (NULL == dc->job_queue);
2095  return dc;
2096 }
2097 
2098 
2131  const struct GNUNET_FS_Uri *uri,
2132  const struct GNUNET_CONTAINER_MetaData *meta,
2133  const char *filename,
2134  const char *tempname,
2135  uint64_t offset,
2136  uint64_t length,
2137  uint32_t anonymity,
2139  void *cctx,
2141 {
2142  struct GNUNET_FS_DownloadContext *dc;
2143 
2145  uri,
2146  meta,
2147  filename,
2148  tempname,
2149  offset,
2150  length,
2151  anonymity,
2152  options,
2153  cctx);
2154  if (NULL == dc)
2155  return NULL;
2156  dc->parent = parent;
2157  if (NULL != parent)
2159  else if (0 == (GNUNET_FS_DOWNLOAD_IS_PROBE & options))
2160  dc->top =
2162  return dc;
2163 }
2164 
2165 
2202  struct GNUNET_FS_SearchResult *sr,
2203  const char *filename,
2204  const char *tempname,
2205  uint64_t offset,
2206  uint64_t length,
2207  uint32_t anonymity,
2209  void *cctx)
2210 {
2211  struct GNUNET_FS_DownloadContext *dc;
2212 
2213  if ((NULL == sr) || (NULL != sr->download))
2214  {
2215  GNUNET_break (0);
2216  return NULL;
2217  }
2219  sr->uri,
2220  sr->meta,
2221  filename,
2222  tempname,
2223  offset,
2224  length,
2225  anonymity,
2226  options,
2227  cctx);
2228  if (NULL == dc)
2229  return NULL;
2230  dc->search = sr;
2231  sr->download = dc;
2232  if (NULL != sr->probe_ctx)
2233  {
2235  sr->probe_ctx = NULL;
2237  }
2238  return dc;
2239 }
2240 
2241 
2247 void
2249 {
2250  if (dc->completed == dc->length)
2251  return;
2252  if (NULL != dc->mq)
2253  return; /* already running */
2254  GNUNET_assert (NULL == dc->job_queue);
2255  GNUNET_assert (NULL == dc->task);
2256  GNUNET_assert (NULL != dc->active);
2257  dc->job_queue =
2258  GNUNET_FS_queue_ (dc->h,
2261  dc,
2262  (dc->length + DBLOCK_SIZE - 1) / DBLOCK_SIZE,
2267  "Download %p put into queue as job %p\n",
2268  dc,
2269  dc->job_queue);
2270 }
2271 
2272 
2278 void
2280 {
2282 }
2283 
2284 
2290 void
2292 {
2293  struct GNUNET_FS_ProgressInfo pi;
2294 
2297 
2298  GNUNET_assert (NULL == dc->task);
2299  dc->job_queue =
2300  GNUNET_FS_queue_ (dc->h,
2303  dc,
2304  (dc->length + DBLOCK_SIZE - 1) / DBLOCK_SIZE,
2308 }
2309 
2310 
2317 void
2319 {
2320  struct GNUNET_FS_ProgressInfo pi;
2321  int have_children;
2322  int search_was_null;
2323 
2324  if (NULL != dc->top)
2325  GNUNET_FS_end_top (dc->h, dc->top);
2326  if (NULL != dc->task)
2327  {
2329  dc->task = NULL;
2330  }
2331  search_was_null = (NULL == dc->search);
2332  if (NULL != dc->search)
2333  {
2334  dc->search->download = NULL;
2336  dc->search = NULL;
2337  }
2338  if (NULL != dc->job_queue)
2339  {
2341  dc->job_queue = NULL;
2342  }
2343  if (NULL != dc->te)
2344  {
2346  dc->te = NULL;
2347  }
2348  have_children = (NULL != dc->child_head) ? GNUNET_YES : GNUNET_NO;
2349  while (NULL != dc->child_head)
2350  GNUNET_FS_download_stop (dc->child_head, do_delete);
2351  if (NULL != dc->parent)
2353  dc->parent->child_tail,
2354  dc);
2355  if (NULL != dc->serialization)
2357  ((NULL != dc->parent) || (! search_was_null))
2360  dc->serialization);
2361  if ((GNUNET_YES == have_children) && (NULL == dc->parent))
2363  (! search_was_null)
2366  dc->serialization);
2370  dc->top_request = NULL;
2371  if (NULL != dc->active)
2372  {
2374  dc->active = NULL;
2375  }
2376  if (NULL != dc->filename)
2377  {
2378  if ((dc->completed != dc->length) && (GNUNET_YES == do_delete))
2379  {
2380  if ((0 != unlink (dc->filename)) && (ENOENT != errno))
2382  "unlink",
2383  dc->filename);
2384  }
2385  GNUNET_free (dc->filename);
2386  }
2389  if (NULL != dc->temp_filename)
2390  {
2391  if (0 != unlink (dc->temp_filename))
2393  "unlink",
2394  dc->temp_filename);
2396  }
2398  GNUNET_assert (NULL == dc->job_queue);
2399  GNUNET_free (dc);
2400 }
2401 
2402 
2403 /* end of fs_download.c */
struct GNUNET_GETOPT_CommandLineOption options[]
Definition: 002.c:5
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
GNUNET_BLOCK_Type
WARNING: This header is generated! In order to add DHT block types, you must register them in GANA,...
@ GNUNET_BLOCK_TYPE_FS_IBLOCK
Inner block in the CHK tree.
@ GNUNET_BLOCK_TYPE_FS_DBLOCK
Data block (leaf) in the CHK tree.
#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:2148
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:380
void GNUNET_FS_download_sync_(struct GNUNET_FS_DownloadContext *dc)
Synchronize this download struct with its mirror on disk.
Definition: fs_api.c:2035
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:727
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:786
void GNUNET_FS_dequeue_(struct GNUNET_FS_QueueEntry *qe)
Dequeue a job from the queue.
Definition: fs_api.c:355
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:320
void GNUNET_FS_end_top(struct GNUNET_FS_Handle *h, struct TopLevelActivity *top)
Destroy a top-level activity entry.
Definition: fs_api.c:401
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:1953
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:1616
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:1306
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:1291
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:1428
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:1768
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:1008
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:1449
void GNUNET_FS_download_start_task_(void *cls)
Task that creates the initial (top-level) download request for the file.
Definition: fs_download.c:1800
static void reconstruct_cont(void *cls)
Continuation after a possible attempt to reconstruct the current IBlock from the existing file.
Definition: fs_download.c:1561
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:1361
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:1485
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:2029
void GNUNET_FS_download_start_downloading_(struct GNUNET_FS_DownloadContext *dc)
Start the downloading process (by entering the queue).
Definition: fs_download.c:2248
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:1589
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:1340
static void try_reconnect(struct GNUNET_FS_DownloadContext *dc)
We've lost our connection with the FS service.
Definition: fs_download.c:1397
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:320
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:432
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:258
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:211
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.
API for file sharing via GNUnet.
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:1055
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:1376
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:2130
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:1217
int GNUNET_FS_uri_test_loc(const struct GNUNET_FS_Uri *uri)
Is this a location URI?
Definition: fs_uri.c:1400
void GNUNET_FS_download_resume(struct GNUNET_FS_DownloadContext *dc)
Resume a suspended download.
Definition: fs_download.c:2291
char * GNUNET_FS_uri_to_string(const struct GNUNET_FS_Uri *uri)
Convert a URI to a UTF-8 String.
Definition: fs_uri.c:2033
void GNUNET_FS_uri_destroy(struct GNUNET_FS_Uri *uri)
Free URI.
Definition: fs_uri.c:684
struct GNUNET_FS_Uri * GNUNET_FS_uri_dup(const struct GNUNET_FS_Uri *uri)
Duplicate URI.
Definition: fs_uri.c:1003
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:2318
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:1362
#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:2201
void GNUNET_FS_download_suspend(struct GNUNET_FS_DownloadContext *dc)
Suspend a download.
Definition: fs_download.c:2279
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:828
@ 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:151
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.
enum GNUNET_GenericReturnValue 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.
enum GNUNET_GenericReturnValue 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.
enum GNUNET_GenericReturnValue 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.
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_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_log(kind,...)
uint64_t GNUNET_ntohll(uint64_t n)
Convert unsigned 64-bit integer to host byte order.
Definition: common_endian.c:53
void * cls
Closure for mv and cb.
EXTRACTOR_MetaFormat
Format in which the extracted meta data is presented.
#define GNUNET_MIN(a, b)
EXTRACTOR_MetaType
Enumeration defining various sources of keywords.
@ GNUNET_OK
Definition: gnunet_common.h:99
@ GNUNET_YES
@ GNUNET_NO
Definition: gnunet_common.h:98
@ GNUNET_SYSERR
Definition: gnunet_common.h:97
@ EXTRACTOR_METATYPE_GNUNET_FULL_DATA
#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:302
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:71
#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:685
#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:1281
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:957
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:1254
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:435
#define GNUNET_TIME_UNIT_MILLISECONDS
One millisecond.
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_get(void)
Get the current time.
Definition: time.c:110
struct GNUNET_TIME_Absolute GNUNET_TIME_absolute_ntoh(struct GNUNET_TIME_AbsoluteNBO a)
Convert absolute time from network byte order.
Definition: time.c:736
#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:570
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:563
#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