src/fs/fs_publish.c

   1 /*
   2      This file is part of GNUnet.
   3      (C) 2009, 2010 Christian Grothoff (and other contributing authors)
   4
   5      GNUnet is free software; you can redistribute it and/or modify
   6      it under the terms of the GNU General Public License as published
   7      by the Free Software Foundation; either version 3, or (at your
   8      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      General Public License for more details.
  14
  15      You should have received a copy of the GNU General Public License
  16      along with GNUnet; see the file COPYING.  If not, write to the
  17      Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18      Boston, MA 02111-1307, USA.
  19 */
  20
  21 /**
  22  * @file fs/fs_publish.c
  23  * @brief publish a file or directory in GNUnet
  24  * @see http://gnunet.org/encoding
  25  * @author Krista Bennett
  26  * @author Christian Grothoff
  27  */
  28
  29 #include "platform.h"
  30 #include "gnunet_constants.h"
  31 #include "gnunet_signatures.h"
  32 #include "gnunet_util_lib.h"
  33 #include "gnunet_fs_service.h"
  34 #include "fs.h"
  35 #include "fs_tree.h"
  36
  37 #define DEBUG_PUBLISH GNUNET_NO
  38
  39
  40 /**
  41  * Context for "ds_put_cont".
  42  */
  43 struct PutContCtx
  44 {
  45   /**
  46    * Current publishing context.
  47    */
  48   struct GNUNET_FS_PublishContext *sc;
  49
  50   /**
  51    * Specific file with the block.
  52    */
  53   struct GNUNET_FS_FileInformation *p;
  54
  55   /**
  56    * Function to run next, if any (can be NULL).
  57    */
  58   GNUNET_SCHEDULER_Task cont;
  59
  60   /**
  61    * Closure for cont.
  62    */
  63   void *cont_cls;
  64 };
  65
  66
  67 /**
  68  * Fill in all of the generic fields for
  69  * a publish event and call the callback.
  70  *
  71  * @param pi structure to fill in
  72  * @param sc overall publishing context
  73  * @param p file information for the file being published
  74  * @param offset where in the file are we so far
  75  * @return value returned from callback
  76  */
  77 void *
  78 GNUNET_FS_publish_make_status_ (struct GNUNET_FS_ProgressInfo *pi,
  79                                 struct GNUNET_FS_PublishContext *sc,
  80                                 const struct GNUNET_FS_FileInformation *p,
  81                                 uint64_t offset)
  82 {
  83   pi->value.publish.pc = sc;
  84   pi->value.publish.fi = p;
  85   pi->value.publish.cctx
  86     = p->client_info;
  87   pi->value.publish.pctx
  88     = (NULL == p->dir) ? NULL : p->dir->client_info;
  89   pi->value.publish.filename = p->filename;
  90   pi->value.publish.size
  91     = (p->is_directory) ? p->data.dir.dir_size : p->data.file.file_size;
  92   pi->value.publish.eta
  93     = GNUNET_TIME_calculate_eta (p->start_time,
  94                                  offset,
  95                                  pi->value.publish.size);
  96   pi->value.publish.completed = offset;
  97   pi->value.publish.duration = GNUNET_TIME_absolute_get_duration (p->start_time);
  98   pi->value.publish.anonymity = p->anonymity;
  99   return sc->h->upcb (sc->h->upcb_cls,
 100                       pi);
 101 }
 102
 103
 104 /**
 105  * Cleanup the publish context, we're done with it.
 106  *
 107  * @param cls struct to clean up after
 108  * @param tc scheduler context
 109  */
 110 static void
 111 publish_cleanup (void *cls,
 112                  const struct GNUNET_SCHEDULER_TaskContext *tc)
 113 {
 114   struct GNUNET_FS_PublishContext *pc = cls;
 115
 116   if (pc->fhc != NULL)
 117     {
 118       GNUNET_CRYPTO_hash_file_cancel (pc->fhc);
 119       pc->fhc = NULL;
 120     }
 121   GNUNET_FS_file_information_destroy (pc->fi, NULL, NULL);
 122   if (pc->namespace != NULL)
 123     GNUNET_FS_namespace_delete (pc->namespace, GNUNET_NO);
 124   GNUNET_free_non_null (pc->nid);
 125   GNUNET_free_non_null (pc->nuid);
 126   GNUNET_free_non_null (pc->serialization);
 127   if (pc->dsh != NULL)
 128     {
 129       GNUNET_DATASTORE_disconnect (pc->dsh, GNUNET_NO);
 130       pc->dsh = NULL;
 131     }
 132   if (pc->client != NULL)
 133     GNUNET_CLIENT_disconnect (pc->client, GNUNET_NO);
 134   GNUNET_free (pc);
 135 }
 136
 137
 138 /**
 139  * Function called by the datastore API with
 140  * the result from the PUT request.
 141  *
 142  * @param cls our closure
 143  * @param success GNUNET_OK on success
 144  * @param msg error message (or NULL)
 145  */
 146 static void
 147 ds_put_cont (void *cls,
 148              int success,
 149              const char *msg)
 150 {
 151   struct PutContCtx *pcc = cls;
 152   struct GNUNET_FS_ProgressInfo pi;
 153
 154   if (GNUNET_SYSERR == pcc->sc->in_network_wait)
 155     {
 156       /* we were aborted in the meantime, finish shutdown! */
 157       GNUNET_SCHEDULER_add_continuation (&publish_cleanup,
 158                                          pcc->sc,
 159                                          GNUNET_SCHEDULER_REASON_PREREQ_DONE);
 160       GNUNET_free (pcc);
 161       return;
 162     }
 163   GNUNET_assert (GNUNET_YES == pcc->sc->in_network_wait);
 164   pcc->sc->in_network_wait = GNUNET_NO;
 165   if (GNUNET_OK != success)
 166     {
 167       GNUNET_asprintf (&pcc->p->emsg,
 168                        _("Publishing failed: %s"),
 169                        msg);
 170       pi.status = GNUNET_FS_STATUS_PUBLISH_ERROR;
 171       pi.value.publish.eta = GNUNET_TIME_UNIT_FOREVER_REL;
 172       pi.value.publish.specifics.error.message = pcc->p->emsg;
 173       pcc->p->client_info = GNUNET_FS_publish_make_status_ (&pi, pcc->sc, pcc->p, 0);
 174       if ( (pcc->p->is_directory == GNUNET_NO) &&
 175            (pcc->p->filename != NULL) &&
 176            (pcc->p->data.file.do_index == GNUNET_YES) )
 177         {
 178           /* run unindex to clean up */
 179           GNUNET_FS_unindex_start (pcc->sc->h,
 180                                    pcc->p->filename,
 181                                    NULL);
 182         }
 183     }
 184   if (NULL != pcc->cont)
 185     pcc->sc->upload_task
 186       = GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
 187                                             pcc->cont,
 188                                             pcc->cont_cls);
 189   GNUNET_free (pcc);
 190 }
 191
 192
 193 /**
 194  * Generate the callback that signals clients
 195  * that a file (or directory) has been completely
 196  * published.
 197  *
 198  * @param p the completed upload
 199  * @param sc context of the publication
 200  */
 201 static void
 202 signal_publish_completion (struct GNUNET_FS_FileInformation *p,
 203                            struct GNUNET_FS_PublishContext *sc)
 204 {
 205   struct GNUNET_FS_ProgressInfo pi;
 206
 207   pi.status = GNUNET_FS_STATUS_PUBLISH_COMPLETED;
 208   pi.value.publish.eta = GNUNET_TIME_UNIT_ZERO;
 209   pi.value.publish.specifics.completed.chk_uri = p->chk_uri;
 210   p->client_info = GNUNET_FS_publish_make_status_ (&pi, sc, p,
 211                                                    GNUNET_ntohll (p->chk_uri->data.chk.file_length));
 212 }
 213
 214
 215 /**
 216  * Generate the callback that signals clients
 217  * that a file (or directory) has encountered
 218  * a problem during publication.
 219  *
 220  * @param p the upload that had trouble
 221  * @param sc context of the publication
 222  * @param emsg error message
 223  */
 224 static void
 225 signal_publish_error (struct GNUNET_FS_FileInformation *p,
 226                       struct GNUNET_FS_PublishContext *sc,
 227                       const char *emsg)
 228 {
 229   struct GNUNET_FS_ProgressInfo pi;
 230
 231   p->emsg = GNUNET_strdup (emsg);
 232   pi.status = GNUNET_FS_STATUS_PUBLISH_ERROR;
 233   pi.value.publish.eta = GNUNET_TIME_UNIT_FOREVER_REL;
 234   pi.value.publish.specifics.error.message =emsg;
 235   p->client_info = GNUNET_FS_publish_make_status_ (&pi, sc, p, 0);
 236   if ( (p->is_directory == GNUNET_NO) &&
 237        (p->filename != NULL) &&
 238        (p->data.file.do_index == GNUNET_YES) )
 239     {
 240       /* run unindex to clean up */
 241       GNUNET_FS_unindex_start (sc->h,
 242                                p->filename,
 243                                NULL);
 244     }
 245
 246 }
 247
 248
 249 /**
 250  * Datastore returns from reservation cancel request.
 251  *
 252  * @param cls the 'struct GNUNET_FS_PublishContext'
 253  * @param success success code (not used)
 254  * @param msg error message (typically NULL, not used)
 255  */
 256 static void
 257 finish_release_reserve (void *cls,
 258                         int success,
 259                         const char *msg)
 260 {
 261   struct GNUNET_FS_PublishContext *pc = cls;
 262
 263   pc->qre = NULL;
 264   signal_publish_completion (pc->fi, pc);
 265   pc->all_done = GNUNET_YES;
 266   GNUNET_FS_publish_sync_ (pc);
 267 }
 268
 269
 270 /**
 271  * We've finished publishing the SBlock as part of a larger upload.
 272  * Check the result and complete the larger upload.
 273  *
 274  * @param cls the "struct GNUNET_FS_PublishContext*" of the larger upload
 275  * @param uri URI of the published SBlock
 276  * @param emsg NULL on success, otherwise error message
 277  */
 278 static void
 279 publish_sblocks_cont (void *cls,
 280                       const struct GNUNET_FS_Uri *uri,
 281                       const char *emsg)
 282 {
 283   struct GNUNET_FS_PublishContext *pc = cls;
 284   if (NULL != emsg)
 285     {
 286       signal_publish_error (pc->fi,
 287                             pc,
 288                             emsg);
 289       GNUNET_FS_publish_sync_ (pc);
 290       return;
 291     }
 292   GNUNET_assert (pc->qre == NULL);
 293   if ( (pc->dsh != NULL) &&
 294        (pc->rid != 0) )
 295     {
 296       pc->qre = GNUNET_DATASTORE_release_reserve (pc->dsh,
 297                                                   pc->rid,
 298                                                   UINT_MAX,
 299                                                   UINT_MAX,
 300                                                   GNUNET_TIME_UNIT_FOREVER_REL,
 301                                                   &finish_release_reserve,
 302                                                   pc);
 303     }
 304   else
 305     {
 306       finish_release_reserve (pc, GNUNET_OK, NULL);
 307     }
 308 }
 309
 310
 311 /**
 312  * We are almost done publishing the structure,
 313  * add SBlocks (if needed).
 314  *
 315  * @param sc overall upload data
 316  */
 317 static void
 318 publish_sblock (struct GNUNET_FS_PublishContext *sc)
 319 {
 320   if (NULL != sc->namespace)
 321     GNUNET_FS_publish_sks (sc->h,
 322                            sc->namespace,
 323                            sc->nid,
 324                            sc->nuid,
 325                            sc->fi->meta,
 326                            sc->fi->chk_uri,
 327                            sc->fi->expirationTime,
 328                            sc->fi->anonymity,
 329                            sc->fi->priority,
 330                            sc->options,
 331                            &publish_sblocks_cont,
 332                            sc);
 333   else
 334     publish_sblocks_cont (sc, NULL, NULL);
 335 }
 336
 337
 338 /**
 339  * We've finished publishing a KBlock as part of a larger upload.
 340  * Check the result and continue the larger upload.
 341  *
 342  * @param cls the "struct GNUNET_FS_PublishContext*"
 343  *        of the larger upload
 344  * @param uri URI of the published blocks
 345  * @param emsg NULL on success, otherwise error message
 346  */
 347 static void
 348 publish_kblocks_cont (void *cls,
 349                       const struct GNUNET_FS_Uri *uri,
 350                       const char *emsg)
 351 {
 352   struct GNUNET_FS_PublishContext *pc = cls;
 353   struct GNUNET_FS_FileInformation *p = pc->fi_pos;
 354
 355   if (NULL != emsg)
 356     {
 357 #if DEBUG_PUBLISH
 358       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 359                   "Error uploading KSK blocks: %s\n",
 360                   emsg);
 361 #endif
 362       signal_publish_error (p, pc, emsg);
 363       GNUNET_FS_file_information_sync_ (p);
 364       GNUNET_FS_publish_sync_ (pc);
 365       pc->upload_task
 366         = GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
 367                                               &GNUNET_FS_publish_main_,
 368                                               pc);
 369       return;
 370     }
 371 #if DEBUG_PUBLISH
 372   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 373               "KSK blocks published, moving on to next file\n");
 374 #endif
 375   if (NULL != p->dir)
 376     signal_publish_completion (p, pc);
 377   /* move on to next file */
 378   if (NULL != p->next)
 379     pc->fi_pos = p->next;
 380   else
 381     pc->fi_pos = p->dir;
 382   GNUNET_FS_publish_sync_ (pc);
 383   pc->upload_task
 384     = GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
 385                                           &GNUNET_FS_publish_main_,
 386                                           pc);
 387 }
 388
 389
 390 /**
 391  * Function called by the tree encoder to obtain
 392  * a block of plaintext data (for the lowest level
 393  * of the tree).
 394  *
 395  * @param cls our publishing context
 396  * @param offset identifies which block to get
 397  * @param max (maximum) number of bytes to get; returning
 398  *        fewer will also cause errors
 399  * @param buf where to copy the plaintext buffer
 400  * @param emsg location to store an error message (on error)
 401  * @return number of bytes copied to buf, 0 on error
 402  */
 403 static size_t
 404 block_reader (void *cls,
 405               uint64_t offset,
 406               size_t max,
 407               void *buf,
 408               char **emsg)
 409 {
 410   struct GNUNET_FS_PublishContext *sc = cls;
 411   struct GNUNET_FS_FileInformation *p;
 412   size_t pt_size;
 413   const char *dd;
 414
 415   p = sc->fi_pos;
 416   if (p->is_directory)
 417     {
 418       pt_size = GNUNET_MIN(max,
 419                            p->data.dir.dir_size - offset);
 420       dd = p->data.dir.dir_data;
 421       memcpy (buf,
 422               &dd[offset],
 423               pt_size);
 424     }
 425   else
 426     {
 427       pt_size = GNUNET_MIN(max,
 428                            p->data.file.file_size - offset);
 429       if (pt_size == 0)
 430         return 0; /* calling reader with pt_size==0
 431                      might free buf, so don't! */
 432       if (pt_size !=
 433           p->data.file.reader (p->data.file.reader_cls,
 434                                offset,
 435                                pt_size,
 436                                buf,
 437                                emsg))
 438         return 0;
 439     }
 440   return pt_size;
 441 }
 442
 443
 444 /**
 445  * The tree encoder has finished processing a
 446  * file.   Call it's finish method and deal with
 447  * the final result.
 448  *
 449  * @param cls our publishing context
 450  * @param tc scheduler's task context (not used)
 451  */
 452 static void
 453 encode_cont (void *cls,
 454              const struct GNUNET_SCHEDULER_TaskContext *tc)
 455 {
 456   struct GNUNET_FS_PublishContext *sc = cls;
 457   struct GNUNET_FS_FileInformation *p;
 458   struct GNUNET_FS_ProgressInfo pi;
 459   char *emsg;
 460
 461   p = sc->fi_pos;
 462   GNUNET_FS_tree_encoder_finish (p->te,
 463                                  &p->chk_uri,
 464                                  &emsg);
 465   p->te = NULL;
 466   if (NULL != emsg)
 467     {
 468 #if DEBUG_PUBLISH
 469       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 470                   "Error during tree walk: %s\n",
 471                   emsg);
 472 #endif
 473       GNUNET_asprintf (&p->emsg,
 474                        _("Publishing failed: %s"),
 475                        emsg);
 476       GNUNET_free (emsg);
 477       pi.status = GNUNET_FS_STATUS_PUBLISH_ERROR;
 478       pi.value.publish.eta = GNUNET_TIME_UNIT_FOREVER_REL;
 479       pi.value.publish.specifics.error.message = p->emsg;
 480       p->client_info =  GNUNET_FS_publish_make_status_ (&pi, sc, p, 0);
 481     }
 482 #if DEBUG_PUBLISH
 483   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 484               "Finished with tree encoder\n");
 485 #endif
 486   /* final progress event */
 487   pi.status = GNUNET_FS_STATUS_PUBLISH_PROGRESS;
 488   pi.value.publish.specifics.progress.data = NULL;
 489   pi.value.publish.specifics.progress.offset = GNUNET_FS_uri_chk_get_file_size (p->chk_uri);
 490   pi.value.publish.specifics.progress.data_len = 0;
 491   pi.value.publish.specifics.progress.depth = 0;
 492   p->client_info = GNUNET_FS_publish_make_status_ (&pi, sc, p,
 493                                                    GNUNET_FS_uri_chk_get_file_size (p->chk_uri));
 494
 495   /* continue with main */
 496   sc->upload_task
 497     = GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
 498                                           &GNUNET_FS_publish_main_,
 499                                           sc);
 500 }
 501
 502
 503 /**
 504  * Function called asking for the current (encoded)
 505  * block to be processed.  After processing the
 506  * client should either call "GNUNET_FS_tree_encode_next"
 507  * or (on error) "GNUNET_FS_tree_encode_finish".
 508  *
 509  * @param cls closure
 510  * @param query the query for the block (key for lookup in the datastore)
 511  * @param offset offset of the block in the file
 512  * @param type type of the block (IBLOCK or DBLOCK)
 513  * @param block the (encrypted) block
 514  * @param block_size size of block (in bytes)
 515  */
 516 static void
 517 block_proc (void *cls,
 518             const GNUNET_HashCode *query,
 519             uint64_t offset,
 520             enum GNUNET_BLOCK_Type type,
 521             const void *block,
 522             uint16_t block_size)
 523 {
 524   struct GNUNET_FS_PublishContext *sc = cls;
 525   struct GNUNET_FS_FileInformation *p;
 526   struct PutContCtx * dpc_cls;
 527   struct OnDemandBlock odb;
 528
 529   p = sc->fi_pos;
 530   if (NULL == sc->dsh)
 531     {
 532 #if DEBUG_PUBLISH
 533       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 534                   "Waiting for datastore connection\n");
 535 #endif
 536       sc->upload_task
 537         = GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
 538                                               &GNUNET_FS_publish_main_,
 539                                               sc);
 540       return;
 541     }
 542
 543   GNUNET_assert (GNUNET_NO == sc->in_network_wait);
 544   sc->in_network_wait = GNUNET_YES;
 545   dpc_cls = GNUNET_malloc(sizeof(struct PutContCtx));
 546   dpc_cls->cont = &GNUNET_FS_publish_main_;
 547   dpc_cls->cont_cls = sc;
 548   dpc_cls->sc = sc;
 549   dpc_cls->p = p;
 550   if ( (! p->is_directory) &&
 551        (GNUNET_YES == p->data.file.do_index) &&
 552        (type == GNUNET_BLOCK_TYPE_FS_DBLOCK) )
 553     {
 554 #if DEBUG_PUBLISH
 555       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 556                   "Indexing block `%s' for offset %llu with index size %u\n",
 557                   GNUNET_h2s (query),
 558                   (unsigned long long) offset,
 559                   sizeof (struct OnDemandBlock));
 560 #endif
 561       odb.offset = GNUNET_htonll (offset);
 562       odb.file_id = p->data.file.file_id;
 563       GNUNET_DATASTORE_put (sc->dsh,
 564                             (p->is_directory) ? 0 : sc->rid,
 565                             query,
 566                             sizeof (struct OnDemandBlock),
 567                             &odb,
 568                             GNUNET_BLOCK_TYPE_FS_ONDEMAND,
 569                             p->priority,
 570                             p->anonymity,
 571                             p->expirationTime,
 572                             -2, 1,
 573                             GNUNET_CONSTANTS_SERVICE_TIMEOUT,
 574                             &ds_put_cont,
 575                             dpc_cls);
 576       return;
 577     }
 578 #if DEBUG_PUBLISH
 579   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 580               "Publishing block `%s' for offset %llu with size %u\n",
 581               GNUNET_h2s (query),
 582               (unsigned long long) offset,
 583               (unsigned int) block_size);
 584 #endif
 585   GNUNET_DATASTORE_put (sc->dsh,
 586                         (p->is_directory) ? 0 : sc->rid,
 587                         query,
 588                         block_size,
 589                         block,
 590                         type,
 591                         p->priority,
 592                         p->anonymity,
 593                         p->expirationTime,
 594                         -2, 1,
 595                         GNUNET_CONSTANTS_SERVICE_TIMEOUT,
 596                         &ds_put_cont,
 597                         dpc_cls);
 598 }
 599
 600
 601 /**
 602  * Function called with information about our
 603  * progress in computing the tree encoding.
 604  *
 605  * @param cls closure
 606  * @param offset where are we in the file
 607  * @param pt_block plaintext of the currently processed block
 608  * @param pt_size size of pt_block
 609  * @param depth depth of the block in the tree
 610  */
 611 static void
 612 progress_proc (void *cls,
 613                uint64_t offset,
 614                const void *pt_block,
 615                size_t pt_size,
 616                unsigned int depth)
 617 {
 618   struct GNUNET_FS_PublishContext *sc = cls;
 619   struct GNUNET_FS_FileInformation *p;
 620   struct GNUNET_FS_ProgressInfo pi;
 621
 622   p = sc->fi_pos;
 623   pi.status = GNUNET_FS_STATUS_PUBLISH_PROGRESS;
 624   pi.value.publish.specifics.progress.data = pt_block;
 625   pi.value.publish.specifics.progress.offset = offset;
 626   pi.value.publish.specifics.progress.data_len = pt_size;
 627   pi.value.publish.specifics.progress.depth = depth;
 628   p->client_info = GNUNET_FS_publish_make_status_ (&pi, sc, p, offset);
 629 }
 630
 631
 632 /**
 633  * We are uploading a file or directory; load (if necessary) the next
 634  * block into memory, encrypt it and send it to the FS service.  Then
 635  * continue with the main task.
 636  *
 637  * @param sc overall upload data
 638  */
 639 static void
 640 publish_content (struct GNUNET_FS_PublishContext *sc)
 641 {
 642   struct GNUNET_FS_FileInformation *p;
 643   char *emsg;
 644   struct GNUNET_FS_DirectoryBuilder *db;
 645   struct GNUNET_FS_FileInformation *dirpos;
 646   void *raw_data;
 647   uint64_t size;
 648
 649   p = sc->fi_pos;
 650   GNUNET_assert (p != NULL);
 651   if (NULL == p->te)
 652     {
 653       if (p->is_directory)
 654         {
 655 #if DEBUG_PUBLISH
 656           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 657                       "Creating directory\n");
 658 #endif
 659           db = GNUNET_FS_directory_builder_create (p->meta);
 660           dirpos = p->data.dir.entries;
 661           while (NULL != dirpos)
 662             {
 663               if (dirpos->is_directory)
 664                 {
 665                   raw_data = dirpos->data.dir.dir_data;
 666                   dirpos->data.dir.dir_data = NULL;
 667                 }
 668               else
 669                 {
 670                   raw_data = NULL;
 671                   if ( (dirpos->data.file.file_size < MAX_INLINE_SIZE) &&
 672                        (dirpos->data.file.file_size > 0) )
 673                     {
 674                       raw_data = GNUNET_malloc (dirpos->data.file.file_size);
 675                       emsg = NULL;
 676                       if (dirpos->data.file.file_size !=
 677                           dirpos->data.file.reader (dirpos->data.file.reader_cls,
 678                                                     0,
 679                                                     dirpos->data.file.file_size,
 680                                                     raw_data,
 681                                                     &emsg))
 682                         {
 683                           GNUNET_free_non_null (emsg);
 684                           GNUNET_free (raw_data);
 685                           raw_data = NULL;
 686                         }
 687                     }
 688                 }
 689               GNUNET_FS_directory_builder_add (db,
 690                                                dirpos->chk_uri,
 691                                                dirpos->meta,
 692                                                raw_data);
 693               GNUNET_free_non_null (raw_data);
 694               dirpos = dirpos->next;
 695             }
 696           GNUNET_FS_directory_builder_finish (db,
 697                                               &p->data.dir.dir_size,
 698                                               &p->data.dir.dir_data);
 699           GNUNET_FS_file_information_sync_ (p);
 700         }
 701       size = (p->is_directory)
 702         ? p->data.dir.dir_size
 703         : p->data.file.file_size;
 704 #if DEBUG_PUBLISH
 705       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 706                   "Creating tree encoder\n");
 707 #endif
 708       p->te = GNUNET_FS_tree_encoder_create (sc->h,
 709                                              size,
 710                                              sc,
 711                                              &block_reader,
 712                                              &block_proc,
 713                                              &progress_proc,
 714                                              &encode_cont);
 715
 716     }
 717 #if DEBUG_PUBLISH
 718   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 719               "Processing next block from tree\n");
 720 #endif
 721   GNUNET_FS_tree_encoder_next (p->te);
 722 }
 723
 724
 725 /**
 726  * Process the response (or lack thereof) from
 727  * the "fs" service to our 'start index' request.
 728  *
 729  * @param cls closure (of type "struct GNUNET_FS_PublishContext*"_)
 730  * @param msg the response we got
 731  */
 732 static void
 733 process_index_start_response (void *cls,
 734                               const struct GNUNET_MessageHeader *msg)
 735 {
 736   struct GNUNET_FS_PublishContext *sc = cls;
 737   struct GNUNET_FS_FileInformation *p;
 738   const char *emsg;
 739   uint16_t msize;
 740
 741   GNUNET_CLIENT_disconnect (sc->client, GNUNET_NO);
 742   sc->client = NULL;
 743   p = sc->fi_pos;
 744   if (msg == NULL)
 745     {
 746       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
 747                   _("Can not index file `%s': %s.  Will try to insert instead.\n"),
 748                   p->filename,
 749                   _("timeout on index-start request to `fs' service"));
 750       p->data.file.do_index = GNUNET_NO;
 751       GNUNET_FS_file_information_sync_ (p);
 752       publish_content (sc);
 753       return;
 754     }
 755   if (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_FS_INDEX_START_OK)
 756     {
 757       msize = ntohs (msg->size);
 758       emsg = (const char *) &msg[1];
 759       if ( (msize <= sizeof (struct GNUNET_MessageHeader)) ||
 760            (emsg[msize - sizeof(struct GNUNET_MessageHeader) - 1] != '\0') )
 761         emsg = gettext_noop ("unknown error");
 762       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
 763                   _("Can not index file `%s': %s.  Will try to insert instead.\n"),
 764                   p->filename,
 765                   gettext (emsg));
 766       p->data.file.do_index = GNUNET_NO;
 767       GNUNET_FS_file_information_sync_ (p);
 768       publish_content (sc);
 769       return;
 770     }
 771   p->data.file.index_start_confirmed = GNUNET_YES;
 772   /* success! continue with indexing */
 773   GNUNET_FS_file_information_sync_ (p);
 774   publish_content (sc);
 775 }
 776
 777
 778 /**
 779  * Function called once the hash computation over an
 780  * indexed file has completed.
 781  *
 782  * @param cls closure, our publishing context
 783  * @param res resulting hash, NULL on error
 784  */
 785 static void
 786 hash_for_index_cb (void *cls,
 787                    const GNUNET_HashCode *
 788                    res)
 789 {
 790   struct GNUNET_FS_PublishContext *sc = cls;
 791   struct GNUNET_FS_FileInformation *p;
 792   struct IndexStartMessage *ism;
 793   size_t slen;
 794   struct GNUNET_CLIENT_Connection *client;
 795   uint64_t dev;
 796   uint64_t ino;
 797   char *fn;
 798
 799   sc->fhc = NULL;
 800   p = sc->fi_pos;
 801   if (NULL == res)
 802     {
 803       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
 804                   _("Can not index file `%s': %s.  Will try to insert instead.\n"),
 805                   p->filename,
 806                   _("failed to compute hash"));
 807       p->data.file.do_index = GNUNET_NO;
 808       GNUNET_FS_file_information_sync_ (p);
 809       publish_content (sc);
 810       return;
 811     }
 812   if (GNUNET_YES == p->data.file.index_start_confirmed)
 813     {
 814       publish_content (sc);
 815       return;
 816     }
 817   fn = GNUNET_STRINGS_filename_expand (p->filename);
 818   GNUNET_assert (fn != NULL);
 819   slen = strlen (fn) + 1;
 820   if (slen >= GNUNET_SERVER_MAX_MESSAGE_SIZE - sizeof(struct IndexStartMessage))
 821     {
 822       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
 823                   _("Can not index file `%s': %s.  Will try to insert instead.\n"),
 824                   fn,
 825                   _("filename too long"));
 826       GNUNET_free (fn);
 827       p->data.file.do_index = GNUNET_NO;
 828       GNUNET_FS_file_information_sync_ (p);
 829       publish_content (sc);
 830       return;
 831     }
 832 #if DEBUG_PUBLISH
 833   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 834               "Hash of indexed file `%s' is `%s'\n",
 835               p->filename,
 836               GNUNET_h2s (res));
 837 #endif
 838   client = GNUNET_CLIENT_connect ("fs",
 839                                   sc->h->cfg);
 840   if (NULL == client)
 841     {
 842       GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
 843                   _("Can not index file `%s': %s.  Will try to insert instead.\n"),
 844                   p->filename,
 845                   _("could not connect to `fs' service"));
 846       p->data.file.do_index = GNUNET_NO;
 847       publish_content (sc);
 848       GNUNET_free (fn);
 849       return;
 850     }
 851   if (p->data.file.have_hash != GNUNET_YES)
 852     {
 853       p->data.file.file_id = *res;
 854       p->data.file.have_hash = GNUNET_YES;
 855       GNUNET_FS_file_information_sync_ (p);
 856     }
 857   ism = GNUNET_malloc (sizeof(struct IndexStartMessage) +
 858                        slen);
 859   ism->header.size = htons(sizeof(struct IndexStartMessage) +
 860                            slen);
 861   ism->header.type = htons(GNUNET_MESSAGE_TYPE_FS_INDEX_START);
 862   if (GNUNET_OK ==
 863       GNUNET_DISK_file_get_identifiers (p->filename,
 864                                         &dev,
 865                                         &ino))
 866     {
 867       ism->device = GNUNET_htonll (dev);
 868       ism->inode = GNUNET_htonll(ino);
 869     }
 870 #if DEBUG_PUBLISH
 871   else
 872     {
 873       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 874                   _("Failed to get file identifiers for `%s'\n"),
 875                   p->filename);
 876     }
 877 #endif
 878   ism->file_id = *res;
 879   memcpy (&ism[1],
 880           fn,
 881           slen);
 882   GNUNET_free (fn);
 883   sc->client = client;
 884   GNUNET_break (GNUNET_YES ==
 885                 GNUNET_CLIENT_transmit_and_get_response (client,
 886                                                          &ism->header,
 887                                                          GNUNET_TIME_UNIT_FOREVER_REL,
 888                                                          GNUNET_YES,
 889                                                          &process_index_start_response,
 890                                                          sc));
 891   GNUNET_free (ism);
 892 }
 893
 894
 895 /**
 896  * Main function that performs the upload.
 897  *
 898  * @param cls "struct GNUNET_FS_PublishContext" identifies the upload
 899  * @param tc task context
 900  */
 901 void
 902 GNUNET_FS_publish_main_ (void *cls,
 903                          const struct GNUNET_SCHEDULER_TaskContext *tc)
 904 {
 905   struct GNUNET_FS_PublishContext *pc = cls;
 906   struct GNUNET_FS_ProgressInfo pi;
 907   struct GNUNET_FS_FileInformation *p;
 908   struct GNUNET_FS_Uri *loc;
 909   char *fn;
 910
 911   pc->upload_task = GNUNET_SCHEDULER_NO_TASK;
 912   p = pc->fi_pos;
 913   if (NULL == p)
 914     {
 915 #if DEBUG_PUBLISH
 916       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 917                   "Publishing complete, now publishing SKS and KSK blocks.\n");
 918 #endif
 919       /* upload of entire hierarchy complete,
 920          publish namespace entries */
 921       GNUNET_FS_publish_sync_ (pc);
 922       publish_sblock (pc);
 923       return;
 924     }
 925   /* find starting position */
 926   while ( (p->is_directory) &&
 927           (NULL != p->data.dir.entries) &&
 928           (NULL == p->emsg) &&
 929           (NULL == p->data.dir.entries->chk_uri) )
 930     {
 931       p = p->data.dir.entries;
 932       pc->fi_pos = p;
 933       GNUNET_FS_publish_sync_ (pc);
 934     }
 935   /* abort on error */
 936   if (NULL != p->emsg)
 937     {
 938 #if DEBUG_PUBLISH
 939       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 940                   "Error uploading: %s\n",
 941                   p->emsg);
 942 #endif
 943       /* error with current file, abort all
 944          related files as well! */
 945       while (NULL != p->dir)
 946         {
 947           fn = GNUNET_CONTAINER_meta_data_get_by_type (p->meta,
 948                                                        EXTRACTOR_METATYPE_FILENAME);
 949           p = p->dir;
 950           if (fn != NULL)
 951             {
 952               GNUNET_asprintf (&p->emsg,
 953                                _("Recursive upload failed at `%s': %s"),
 954                                fn,
 955                                p->emsg);
 956               GNUNET_free (fn);
 957             }
 958           else
 959             {
 960               GNUNET_asprintf (&p->emsg,
 961                                _("Recursive upload failed: %s"),
 962                                p->emsg);
 963             }
 964           pi.status = GNUNET_FS_STATUS_PUBLISH_ERROR;
 965           pi.value.publish.eta = GNUNET_TIME_UNIT_FOREVER_REL;
 966           pi.value.publish.specifics.error.message = p->emsg;
 967           p->client_info = GNUNET_FS_publish_make_status_ (&pi, pc, p, 0);
 968         }
 969       pc->all_done = GNUNET_YES;
 970       GNUNET_FS_publish_sync_ (pc);
 971       return;
 972     }
 973   /* handle completion */
 974   if (NULL != p->chk_uri)
 975     {
 976 #if DEBUG_PUBLISH
 977       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 978                   "File upload complete, now publishing KSK blocks.\n");
 979 #endif
 980       if (0 == p->anonymity)
 981         {
 982           /* zero anonymity, box CHK URI in LOC URI */
 983           loc = GNUNET_FS_uri_loc_create (p->chk_uri,
 984                                           pc->h->cfg,
 985                                           p->expirationTime);
 986           GNUNET_FS_uri_destroy (p->chk_uri);
 987           p->chk_uri = loc;
 988         }
 989       GNUNET_FS_publish_sync_ (pc);
 990       /* upload of "p" complete, publish KBlocks! */
 991       if (p->keywords != NULL)
 992         {
 993           GNUNET_FS_publish_ksk (pc->h,
 994                                  p->keywords,
 995                                  p->meta,
 996                                  p->chk_uri,
 997                                  p->expirationTime,
 998                                  p->anonymity,
 999                                  p->priority,
1000                                  pc->options,
1001                                  &publish_kblocks_cont,
1002                                  pc);
1003         }
1004       else
1005         {
1006           publish_kblocks_cont (pc,
1007                                 p->chk_uri,
1008                                 NULL);
1009         }
1010       return;
1011     }
1012   if ( (!p->is_directory) &&
1013        (p->data.file.do_index) )
1014     {
1015       if (NULL == p->filename)
1016         {
1017           p->data.file.do_index = GNUNET_NO;
1018           GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1019                       _("Can not index file `%s': %s.  Will try to insert instead.\n"),
1020                       "<no-name>",
1021                       _("needs to be an actual file"));
1022           GNUNET_FS_file_information_sync_ (p);
1023           publish_content (pc);
1024           return;
1025         }
1026       if (p->data.file.have_hash)
1027         {
1028           hash_for_index_cb (pc,
1029                              &p->data.file.file_id);
1030         }
1031       else
1032         {
1033           p->start_time = GNUNET_TIME_absolute_get ();
1034           pc->fhc = GNUNET_CRYPTO_hash_file (GNUNET_SCHEDULER_PRIORITY_IDLE,
1035                                              p->filename,
1036                                              HASHING_BLOCKSIZE,
1037                                              &hash_for_index_cb,
1038                                              pc);
1039         }
1040       return;
1041     }
1042   publish_content (pc);
1043 }
1044
1045
1046 /**
1047  * Signal the FS's progress function that we are starting
1048  * an upload.
1049  *
1050  * @param cls closure (of type "struct GNUNET_FS_PublishContext*")
1051  * @param fi the entry in the publish-structure
1052  * @param length length of the file or directory
1053  * @param meta metadata for the file or directory (can be modified)
1054  * @param uri pointer to the keywords that will be used for this entry (can be modified)
1055  * @param anonymity pointer to selected anonymity level (can be modified)
1056  * @param priority pointer to selected priority (can be modified)
1057  * @param do_index should we index?
1058  * @param expirationTime pointer to selected expiration time (can be modified)
1059  * @param client_info pointer to client context set upon creation (can be modified)
1060  * @return GNUNET_OK to continue (always)
1061  */
1062 static int
1063 fip_signal_start(void *cls,
1064                  struct GNUNET_FS_FileInformation *fi,
1065                  uint64_t length,
1066                  struct GNUNET_CONTAINER_MetaData *meta,
1067                  struct GNUNET_FS_Uri **uri,
1068                  uint32_t *anonymity,
1069                  uint32_t *priority,
1070                  int *do_index,
1071                  struct GNUNET_TIME_Absolute *expirationTime,
1072                  void **client_info)
1073 {
1074   struct GNUNET_FS_PublishContext *sc = cls;
1075   struct GNUNET_FS_ProgressInfo pi;
1076   unsigned int kc;
1077   uint64_t left;
1078
1079   if (*do_index)
1080     {
1081       /* space for on-demand blocks */
1082       sc->reserve_space += ((length + DBLOCK_SIZE - 1) / DBLOCK_SIZE) * sizeof (struct OnDemandBlock);
1083     }
1084   else
1085     {
1086       /* space for DBlocks */
1087       sc->reserve_space += length;
1088     }
1089   /* entries for IBlocks and DBlocks, space for IBlocks */
1090   left = length;
1091   while (1)
1092     {
1093       left = (left + DBLOCK_SIZE - 1) / DBLOCK_SIZE;
1094       sc->reserve_entries += left;
1095       if (left <= 1)
1096         break;
1097       left = left * sizeof (struct ContentHashKey);
1098       sc->reserve_space += left;
1099     }
1100   sc->reserve_entries++;
1101   /* entries and space for keywords */
1102   if (NULL != *uri)
1103     {
1104       kc = GNUNET_FS_uri_ksk_get_keyword_count (*uri);
1105       sc->reserve_entries += kc;
1106       sc->reserve_space += GNUNET_SERVER_MAX_MESSAGE_SIZE * kc;
1107     }
1108   pi.status = GNUNET_FS_STATUS_PUBLISH_START;
1109   *client_info = GNUNET_FS_publish_make_status_ (&pi, sc, fi, 0);
1110   GNUNET_FS_file_information_sync_ (fi);
1111   return GNUNET_OK;
1112 }
1113
1114
1115 /**
1116  * Signal the FS's progress function that we are suspending
1117  * an upload.
1118  *
1119  * @param cls closure (of type "struct GNUNET_FS_PublishContext*")
1120  * @param fi the entry in the publish-structure
1121  * @param length length of the file or directory
1122  * @param meta metadata for the file or directory (can be modified)
1123  * @param uri pointer to the keywords that will be used for this entry (can be modified)
1124  * @param anonymity pointer to selected anonymity level (can be modified)
1125  * @param priority pointer to selected priority (can be modified)
1126  * @param do_index should we index?
1127  * @param expirationTime pointer to selected expiration time (can be modified)
1128  * @param client_info pointer to client context set upon creation (can be modified)
1129  * @return GNUNET_OK to continue (always)
1130  */
1131 static int
1132 fip_signal_suspend(void *cls,
1133                    struct GNUNET_FS_FileInformation *fi,
1134                    uint64_t length,
1135                    struct GNUNET_CONTAINER_MetaData *meta,
1136                    struct GNUNET_FS_Uri **uri,
1137                    uint32_t *anonymity,
1138                    uint32_t *priority,
1139                    int *do_index,
1140                    struct GNUNET_TIME_Absolute *expirationTime,
1141                    void **client_info)
1142 {
1143   struct GNUNET_FS_PublishContext*sc = cls;
1144   struct GNUNET_FS_ProgressInfo pi;
1145   uint64_t off;
1146
1147   GNUNET_free_non_null (fi->serialization);
1148   fi->serialization = NULL;
1149   off = (fi->chk_uri == NULL) ? 0 : length;
1150   pi.status = GNUNET_FS_STATUS_PUBLISH_SUSPEND;
1151   GNUNET_break (NULL == GNUNET_FS_publish_make_status_ (&pi, sc, fi, off));
1152   *client_info = NULL;
1153   if (NULL != sc->dsh)
1154     {
1155       GNUNET_DATASTORE_disconnect (sc->dsh, GNUNET_NO);
1156       sc->dsh = NULL;
1157     }
1158   return GNUNET_OK;
1159 }
1160
1161
1162 /**
1163  * Create SUSPEND event for the given publish operation
1164  * and then clean up our state (without stop signal).
1165  *
1166  * @param cls the 'struct GNUNET_FS_PublishContext' to signal for
1167  */
1168 void
1169 GNUNET_FS_publish_signal_suspend_ (void *cls)
1170 {
1171   struct GNUNET_FS_PublishContext *pc = cls;
1172
1173   if (GNUNET_SCHEDULER_NO_TASK != pc->upload_task)
1174     {
1175       GNUNET_SCHEDULER_cancel (pc->upload_task);
1176       pc->upload_task = GNUNET_SCHEDULER_NO_TASK;
1177     }
1178   GNUNET_FS_file_information_inspect (pc->fi,
1179                                       &fip_signal_suspend,
1180                                       pc);
1181   GNUNET_FS_end_top (pc->h, pc->top);
1182   publish_cleanup (pc, NULL);
1183 }
1184
1185
1186 /**
1187  * We have gotten a reply for our space reservation request.
1188  * Either fail (insufficient space) or start publishing for good.
1189  *
1190  * @param cls the 'struct GNUNET_FS_PublishContext*'
1191  * @param success positive reservation ID on success
1192  * @param msg error message on error, otherwise NULL
1193  */
1194 static void
1195 finish_reserve (void *cls,
1196                 int success,
1197                 const char *msg)
1198 {
1199   struct GNUNET_FS_PublishContext *pc = cls;
1200
1201   pc->qre = NULL;
1202   if ( (msg != NULL) ||
1203        (success <= 0) )
1204     {
1205       GNUNET_asprintf (&pc->fi->emsg,
1206                        _("Insufficient space for publishing: %s"),
1207                        msg);
1208       signal_publish_error (pc->fi,
1209                             pc,
1210                             pc->fi->emsg);
1211       return;
1212     }
1213   pc->rid = success;
1214   pc->upload_task
1215     = GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
1216                                           &GNUNET_FS_publish_main_,
1217                                           pc);
1218 }
1219
1220
1221 /**
1222  * Publish a file or directory.
1223  *
1224  * @param h handle to the file sharing subsystem
1225  * @param fi information about the file or directory structure to publish
1226  * @param namespace namespace to publish the file in, NULL for no namespace
1227  * @param nid identifier to use for the publishd content in the namespace
1228  *        (can be NULL, must be NULL if namespace is NULL)
1229  * @param nuid update-identifier that will be used for future updates
1230  *        (can be NULL, must be NULL if namespace or nid is NULL)
1231  * @param options options for the publication
1232  * @return context that can be used to control the publish operation
1233  */
1234 struct GNUNET_FS_PublishContext *
1235 GNUNET_FS_publish_start (struct GNUNET_FS_Handle *h,
1236                          struct GNUNET_FS_FileInformation *fi,
1237                          struct GNUNET_FS_Namespace *namespace,
1238                          const char *nid,
1239                          const char *nuid,
1240                          enum GNUNET_FS_PublishOptions options)
1241 {
1242   struct GNUNET_FS_PublishContext *ret;
1243   struct GNUNET_DATASTORE_Handle *dsh;
1244
1245   GNUNET_assert (NULL != h);
1246   if (0 == (options & GNUNET_FS_PUBLISH_OPTION_SIMULATE_ONLY))
1247     {
1248       dsh = GNUNET_DATASTORE_connect (h->cfg);
1249       if (NULL == dsh)
1250         return NULL;
1251     }
1252   else
1253     {
1254       dsh = NULL;
1255     }
1256   ret = GNUNET_malloc (sizeof (struct GNUNET_FS_PublishContext));
1257   ret->dsh = dsh;
1258   ret->h = h;
1259   ret->fi = fi;
1260   ret->namespace = namespace;
1261   if (namespace != NULL)
1262     {
1263       namespace->rc++;
1264       GNUNET_assert (NULL != nid);
1265       ret->nid = GNUNET_strdup (nid);
1266       if (NULL != nuid)
1267         ret->nuid = GNUNET_strdup (nuid);
1268     }
1269   /* signal start */
1270   GNUNET_FS_file_information_inspect (ret->fi,
1271                                       &fip_signal_start,
1272                                       ret);
1273   ret->fi_pos = ret->fi;
1274   ret->top = GNUNET_FS_make_top (h, &GNUNET_FS_publish_signal_suspend_, ret);
1275   GNUNET_FS_publish_sync_ (ret);
1276   if (NULL != ret->dsh)
1277     {
1278       GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1279                   _("Reserving space for %u entries and %llu bytes for publication\n"),
1280                   (unsigned int) ret->reserve_entries,
1281                   (unsigned long long) ret->reserve_space);
1282       ret->qre = GNUNET_DATASTORE_reserve (ret->dsh,
1283                                            ret->reserve_space,
1284                                            ret->reserve_entries,
1285                                            UINT_MAX,
1286                                            UINT_MAX,
1287                                            GNUNET_TIME_UNIT_FOREVER_REL,
1288                                            &finish_reserve,
1289                                            ret);
1290     }
1291   else
1292     {
1293       ret->upload_task
1294         = GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_BACKGROUND,
1295                                               &GNUNET_FS_publish_main_,
1296                                               ret);
1297     }
1298   return ret;
1299 }
1300
1301
1302 /**
1303  * Signal the FS's progress function that we are stopping
1304  * an upload.
1305  *
1306  * @param cls closure (of type "struct GNUNET_FS_PublishContext*")
1307  * @param fi the entry in the publish-structure
1308  * @param length length of the file or directory
1309  * @param meta metadata for the file or directory (can be modified)
1310  * @param uri pointer to the keywords that will be used for this entry (can be modified)
1311  * @param anonymity pointer to selected anonymity level (can be modified)
1312  * @param priority pointer to selected priority (can be modified)
1313  * @param do_index should we index?
1314  * @param expirationTime pointer to selected expiration time (can be modified)
1315  * @param client_info pointer to client context set upon creation (can be modified)
1316  * @return GNUNET_OK to continue (always)
1317  */
1318 static int
1319 fip_signal_stop(void *cls,
1320                 struct GNUNET_FS_FileInformation *fi,
1321                 uint64_t length,
1322                 struct GNUNET_CONTAINER_MetaData *meta,
1323                 struct GNUNET_FS_Uri **uri,
1324                 uint32_t *anonymity,
1325                 uint32_t *priority,
1326                 int *do_index,
1327                 struct GNUNET_TIME_Absolute *expirationTime,
1328                 void **client_info)
1329 {
1330   struct GNUNET_FS_PublishContext*sc = cls;
1331   struct GNUNET_FS_ProgressInfo pi;
1332   uint64_t off;
1333
1334   if (fi->serialization != NULL)
1335     {
1336       GNUNET_FS_remove_sync_file_ (sc->h,
1337                                    GNUNET_FS_SYNC_PATH_FILE_INFO,
1338                                    fi->serialization);
1339       GNUNET_free (fi->serialization);
1340       fi->serialization = NULL;
1341     }
1342   off = (fi->chk_uri == NULL) ? 0 : length;
1343   pi.status = GNUNET_FS_STATUS_PUBLISH_STOPPED;
1344   GNUNET_break (NULL == GNUNET_FS_publish_make_status_ (&pi, sc, fi, off));
1345   *client_info = NULL;
1346   return GNUNET_OK;
1347 }
1348
1349
1350 /**
1351  * Stop an upload.  Will abort incomplete uploads (but
1352  * not remove blocks that have already been publishd) or
1353  * simply clean up the state for completed uploads.
1354  * Must NOT be called from within the event callback!
1355  *
1356  * @param pc context for the upload to stop
1357  */
1358 void
1359 GNUNET_FS_publish_stop (struct GNUNET_FS_PublishContext *pc)
1360 {
1361   GNUNET_FS_end_top (pc->h, pc->top);
1362   if (NULL != pc->qre)
1363     {
1364       GNUNET_DATASTORE_cancel (pc->qre);
1365       pc->qre = NULL;
1366     }
1367   if (NULL != pc->dsh)
1368     {
1369       GNUNET_DATASTORE_disconnect (pc->dsh, GNUNET_NO);
1370       pc->dsh = NULL;
1371     }
1372   if (GNUNET_SCHEDULER_NO_TASK != pc->upload_task)
1373     {
1374       GNUNET_SCHEDULER_cancel (pc->upload_task);
1375       pc->upload_task = GNUNET_SCHEDULER_NO_TASK;
1376     }
1377   if (pc->serialization != NULL)
1378     {
1379       GNUNET_FS_remove_sync_file_ (pc->h, GNUNET_FS_SYNC_PATH_MASTER_PUBLISH, pc->serialization);
1380       GNUNET_free (pc->serialization);
1381       pc->serialization = NULL;
1382     }
1383   GNUNET_FS_file_information_inspect (pc->fi,
1384                                       &fip_signal_stop,
1385                                       pc);
1386   if (GNUNET_YES == pc->in_network_wait)
1387     {
1388       pc->in_network_wait = GNUNET_SYSERR;
1389       return;
1390     }
1391   publish_cleanup (pc, NULL);
1392 }
1393
1394
1395 /**
1396  * Context for the KSK publication.
1397  */
1398 struct PublishKskContext
1399 {
1400
1401   /**
1402    * Keywords to use.
1403    */
1404   struct GNUNET_FS_Uri *ksk_uri;
1405
1406   /**
1407    * Global FS context.
1408    */
1409   struct GNUNET_FS_Handle *h;
1410
1411   /**
1412    * The master block that we are sending
1413    * (in plaintext), has "mdsize+slen" more
1414    * bytes than the struct would suggest.
1415    */
1416   struct KBlock *kb;
1417
1418   /**
1419    * Buffer of the same size as "kb" for
1420    * the encrypted version.
1421    */
1422   struct KBlock *cpy;
1423
1424   /**
1425    * Handle to the datastore, NULL if we are just
1426    * simulating.
1427    */
1428   struct GNUNET_DATASTORE_Handle *dsh;
1429
1430   /**
1431    * Function to call once we're done.
1432    */
1433   GNUNET_FS_PublishContinuation cont;
1434
1435   /**
1436    * Closure for cont.
1437    */
1438   void *cont_cls;
1439
1440   /**
1441    * When should the KBlocks expire?
1442    */
1443   struct GNUNET_TIME_Absolute expirationTime;
1444
1445   /**
1446    * Size of the serialized metadata.
1447    */
1448   ssize_t mdsize;
1449
1450   /**
1451    * Size of the (CHK) URI as a string.
1452    */
1453   size_t slen;
1454
1455   /**
1456    * Keyword that we are currently processing.
1457    */
1458   unsigned int i;
1459
1460   /**
1461    * Anonymity level for the KBlocks.
1462    */
1463   uint32_t anonymity;
1464
1465   /**
1466    * Priority for the KBlocks.
1467    */
1468   uint32_t priority;
1469 };
1470
1471
1472 /**
1473  * Continuation of "GNUNET_FS_publish_ksk" that performs
1474  * the actual publishing operation (iterating over all
1475  * of the keywords).
1476  *
1477  * @param cls closure of type "struct PublishKskContext*"
1478  * @param tc unused
1479  */
1480 static void
1481 publish_ksk_cont (void *cls,
1482                   const struct GNUNET_SCHEDULER_TaskContext *tc);
1483
1484
1485 /**
1486  * Function called by the datastore API with
1487  * the result from the PUT request.
1488  *
1489  * @param cls closure of type "struct PublishKskContext*"
1490  * @param success GNUNET_OK on success
1491  * @param msg error message (or NULL)
1492  */
1493 static void
1494 kb_put_cont (void *cls,
1495              int success,
1496              const char *msg)
1497 {
1498   struct PublishKskContext *pkc = cls;
1499
1500   if (GNUNET_OK != success)
1501     {
1502       if (NULL != pkc->dsh)
1503         {
1504           GNUNET_DATASTORE_disconnect (pkc->dsh, GNUNET_NO);
1505           pkc->dsh = NULL;
1506         }
1507       GNUNET_free (pkc->cpy);
1508       GNUNET_free (pkc->kb);
1509       pkc->cont (pkc->cont_cls,
1510                  NULL,
1511                  msg);
1512       GNUNET_FS_uri_destroy (pkc->ksk_uri);
1513       GNUNET_free (pkc);
1514       return;
1515     }
1516   GNUNET_SCHEDULER_add_continuation (&publish_ksk_cont,
1517                                      pkc,
1518                                      GNUNET_SCHEDULER_REASON_PREREQ_DONE);
1519 }
1520
1521
1522 /**
1523  * Continuation of "GNUNET_FS_publish_ksk" that performs the actual
1524  * publishing operation (iterating over all of the keywords).
1525  *
1526  * @param cls closure of type "struct PublishKskContext*"
1527  * @param tc unused
1528  */
1529 static void
1530 publish_ksk_cont (void *cls,
1531                   const struct GNUNET_SCHEDULER_TaskContext *tc)
1532 {
1533   struct PublishKskContext *pkc = cls;
1534   const char *keyword;
1535   GNUNET_HashCode key;
1536   GNUNET_HashCode query;
1537   struct GNUNET_CRYPTO_AesSessionKey skey;
1538   struct GNUNET_CRYPTO_AesInitializationVector iv;
1539   struct GNUNET_CRYPTO_RsaPrivateKey *pk;
1540
1541
1542   if ( (pkc->i == pkc->ksk_uri->data.ksk.keywordCount) ||
1543        (NULL == pkc->dsh) )
1544     {
1545       if (NULL != pkc->dsh)
1546         {
1547           GNUNET_DATASTORE_disconnect (pkc->dsh, GNUNET_NO);
1548           pkc->dsh = NULL;
1549         }
1550       GNUNET_free (pkc->cpy);
1551       GNUNET_free (pkc->kb);
1552       pkc->cont (pkc->cont_cls,
1553                  pkc->ksk_uri,
1554                  NULL);
1555       GNUNET_FS_uri_destroy (pkc->ksk_uri);
1556       GNUNET_free (pkc);
1557       return;
1558     }
1559   keyword = pkc->ksk_uri->data.ksk.keywords[pkc->i++];
1560   /* first character of keyword indicates if it is
1561      mandatory or not -- ignore for hashing */
1562   GNUNET_CRYPTO_hash (&keyword[1], strlen (&keyword[1]), &key);
1563   GNUNET_CRYPTO_hash_to_aes_key (&key, &skey, &iv);
1564   GNUNET_CRYPTO_aes_encrypt (&pkc->kb[1],
1565                              pkc->slen + pkc->mdsize,
1566                              &skey,
1567                              &iv,
1568                              &pkc->cpy[1]);
1569   pk = GNUNET_CRYPTO_rsa_key_create_from_hash (&key);
1570   GNUNET_assert (NULL != pk);
1571   GNUNET_CRYPTO_rsa_key_get_public (pk, &pkc->cpy->keyspace);
1572   GNUNET_CRYPTO_hash (&pkc->cpy->keyspace,
1573                       sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1574                       &query);
1575   GNUNET_assert (GNUNET_OK ==
1576                  GNUNET_CRYPTO_rsa_sign (pk,
1577                                          &pkc->cpy->purpose,
1578                                          &pkc->cpy->signature));
1579   GNUNET_CRYPTO_rsa_key_free (pk);
1580   GNUNET_DATASTORE_put (pkc->dsh,
1581                         0,
1582                         &query,
1583                         pkc->mdsize +
1584                         sizeof (struct KBlock) +
1585                         pkc->slen,
1586                         pkc->cpy,
1587                         GNUNET_BLOCK_TYPE_FS_KBLOCK,
1588                         pkc->priority,
1589                         pkc->anonymity,
1590                         pkc->expirationTime,
1591                         -2, 1,
1592                         GNUNET_CONSTANTS_SERVICE_TIMEOUT,
1593                         &kb_put_cont,
1594                         pkc);
1595 }
1596
1597
1598 /**
1599  * Publish a CHK under various keywords on GNUnet.
1600  *
1601  * @param h handle to the file sharing subsystem
1602  * @param ksk_uri keywords to use
1603  * @param meta metadata to use
1604  * @param uri URI to refer to in the KBlock
1605  * @param expirationTime when the KBlock expires
1606  * @param anonymity anonymity level for the KBlock
1607  * @param priority priority for the KBlock
1608  * @param options publication options
1609  * @param cont continuation
1610  * @param cont_cls closure for cont
1611  */
1612 void
1613 GNUNET_FS_publish_ksk (struct GNUNET_FS_Handle *h,
1614                        const struct GNUNET_FS_Uri *ksk_uri,
1615                        const struct GNUNET_CONTAINER_MetaData *meta,
1616                        const struct GNUNET_FS_Uri *uri,
1617                        struct GNUNET_TIME_Absolute expirationTime,
1618                        uint32_t anonymity,
1619                        uint32_t priority,
1620                        enum GNUNET_FS_PublishOptions options,
1621                        GNUNET_FS_PublishContinuation cont,
1622                        void *cont_cls)
1623 {
1624   struct PublishKskContext *pkc;
1625   char *uris;
1626   size_t size;
1627   char *kbe;
1628   char *sptr;
1629
1630   GNUNET_assert (NULL != uri);
1631   pkc = GNUNET_malloc (sizeof (struct PublishKskContext));
1632   pkc->h = h;
1633   pkc->expirationTime = expirationTime;
1634   pkc->anonymity = anonymity;
1635   pkc->priority = priority;
1636   pkc->cont = cont;
1637   pkc->cont_cls = cont_cls;
1638   if (0 == (options & GNUNET_FS_PUBLISH_OPTION_SIMULATE_ONLY))
1639     {
1640       pkc->dsh = GNUNET_DATASTORE_connect (h->cfg);
1641       if (pkc->dsh == NULL)
1642         {
1643           cont (cont_cls, NULL, _("Could not connect to datastore."));
1644           GNUNET_free (pkc);
1645           return;
1646         }
1647     }
1648   if (meta == NULL)
1649     pkc->mdsize = 0;
1650   else
1651     pkc->mdsize = GNUNET_CONTAINER_meta_data_get_serialized_size (meta);
1652   GNUNET_assert (pkc->mdsize >= 0);
1653   uris = GNUNET_FS_uri_to_string (uri);
1654   pkc->slen = strlen (uris) + 1;
1655   size = pkc->mdsize + sizeof (struct KBlock) + pkc->slen;
1656   if (size > MAX_KBLOCK_SIZE)
1657     {
1658       size = MAX_KBLOCK_SIZE;
1659       pkc->mdsize = size - sizeof (struct KBlock) - pkc->slen;
1660     }
1661   pkc->kb = GNUNET_malloc (size);
1662   kbe = (char *) &pkc->kb[1];
1663   memcpy (kbe, uris, pkc->slen);
1664   GNUNET_free (uris);
1665   sptr = &kbe[pkc->slen];
1666   if (meta != NULL)
1667     pkc->mdsize = GNUNET_CONTAINER_meta_data_serialize (meta,
1668                                                         &sptr,
1669                                                         pkc->mdsize,
1670                                                         GNUNET_CONTAINER_META_DATA_SERIALIZE_PART);
1671   if (pkc->mdsize == -1)
1672     {
1673       GNUNET_break (0);
1674       GNUNET_free (pkc->kb);
1675       if (pkc->dsh != NULL)
1676         {
1677           GNUNET_DATASTORE_disconnect (pkc->dsh, GNUNET_NO);
1678           pkc->dsh = NULL;
1679         }
1680       cont (cont_cls, NULL, _("Internal error."));
1681       GNUNET_free (pkc);
1682       return;
1683     }
1684   size = sizeof (struct KBlock) + pkc->slen + pkc->mdsize;
1685
1686   pkc->cpy = GNUNET_malloc (size);
1687   pkc->cpy->purpose.size = htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
1688                                   sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) +
1689                                   pkc->mdsize +
1690                                   pkc->slen);
1691   pkc->cpy->purpose.purpose = htonl(GNUNET_SIGNATURE_PURPOSE_FS_KBLOCK);
1692   pkc->ksk_uri = GNUNET_FS_uri_dup (ksk_uri);
1693   GNUNET_SCHEDULER_add_continuation (&publish_ksk_cont,
1694                                      pkc,
1695                                      GNUNET_SCHEDULER_REASON_PREREQ_DONE);
1696 }
1697
1698
1699 /* end of fs_publish.c */