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- /*
- This file is part of GNUnet.
- (C) 2003, 2004, 2006, 2009 Christian Grothoff (and other contributing authors)
- GNUnet is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 3, or (at your
- option) any later version.
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
- */
- /**
- * @file fs/fs_list_indexed.c
- * @author Christian Grothoff
- * @brief provide a list of all indexed files
- */
- #include "platform.h"
- #include "gnunet_constants.h"
- #include "gnunet_fs_service.h"
- #include "gnunet_protocols.h"
- #include "fs.h"
- /**
- * Context for "GNUNET_FS_get_indexed_files".
- */
- struct GetIndexedContext
- {
- /**
- * Handle to global FS context.
- */
- struct GNUNET_FS_Handle *h;
- /**
- * Connection to the FS service.
- */
- struct GNUNET_CLIENT_Connection *client;
- /**
- * Function to call for each indexed file.
- */
- GNUNET_FS_IndexedFileProcessor iterator;
- /**
- * Closure for iterator.
- */
- void *iterator_cls;
- /**
- * Continuation to trigger at the end.
- */
- GNUNET_SCHEDULER_Task cont;
- /**
- * Closure for cont.
- */
- void *cont_cls;
- };
- /**
- * Function called on each response from the FS
- * service with information about indexed files.
- *
- * @param cls closure (of type "struct GetIndexedContext*")
- * @param msg message with indexing information
- */
- static void
- handle_index_info (void *cls, const struct GNUNET_MessageHeader *msg)
- {
- struct GetIndexedContext *gic = cls;
- const struct IndexInfoMessage *iim;
- uint16_t msize;
- const char *filename;
- if (NULL == msg)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _
- ("Failed to receive response for `%s' request from `%s' service.\n"),
- "GET_INDEXED", "fs");
- GNUNET_SCHEDULER_add_continuation (gic->cont, gic->cont_cls,
- GNUNET_SCHEDULER_REASON_TIMEOUT);
- GNUNET_CLIENT_disconnect (gic->client, GNUNET_NO);
- GNUNET_free (gic);
- return;
- }
- if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_END)
- {
- /* normal end-of-list */
- GNUNET_SCHEDULER_add_continuation (gic->cont, gic->cont_cls,
- GNUNET_SCHEDULER_REASON_PREREQ_DONE);
- GNUNET_CLIENT_disconnect (gic->client, GNUNET_NO);
- GNUNET_free (gic);
- return;
- }
- msize = ntohs (msg->size);
- iim = (const struct IndexInfoMessage *) msg;
- filename = (const char *) &iim[1];
- if ((ntohs (msg->type) != GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_ENTRY) ||
- (msize <= sizeof (struct IndexInfoMessage)) ||
- (filename[msize - sizeof (struct IndexInfoMessage) - 1] != '\0'))
- {
- /* bogus reply */
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _
- ("Failed to receive valid response for `%s' request from `%s' service.\n"),
- "GET_INDEXED", "fs");
- GNUNET_SCHEDULER_add_continuation (gic->cont, gic->cont_cls,
- GNUNET_SCHEDULER_REASON_TIMEOUT);
- GNUNET_CLIENT_disconnect (gic->client, GNUNET_NO);
- GNUNET_free (gic);
- return;
- }
- if (GNUNET_OK != gic->iterator (gic->iterator_cls, filename, &iim->file_id))
- {
- GNUNET_SCHEDULER_add_continuation (gic->cont, gic->cont_cls,
- GNUNET_SCHEDULER_REASON_PREREQ_DONE);
- GNUNET_CLIENT_disconnect (gic->client, GNUNET_NO);
- GNUNET_free (gic);
- return;
- }
- /* get more */
- GNUNET_CLIENT_receive (gic->client, &handle_index_info, gic,
- GNUNET_CONSTANTS_SERVICE_TIMEOUT);
- }
- /**
- * Iterate over all indexed files.
- *
- * @param h handle to the file sharing subsystem
- * @param iterator function to call on each indexed file
- * @param iterator_cls closure for iterator
- * @param cont continuation to call when done;
- * reason should be "TIMEOUT" (on
- * error) or "PREREQ_DONE" (on success)
- * @param cont_cls closure for cont
- */
- void
- GNUNET_FS_get_indexed_files (struct GNUNET_FS_Handle *h,
- GNUNET_FS_IndexedFileProcessor iterator,
- void *iterator_cls, GNUNET_SCHEDULER_Task cont,
- void *cont_cls)
- {
- struct GNUNET_CLIENT_Connection *client;
- struct GetIndexedContext *gic;
- struct GNUNET_MessageHeader msg;
- client = GNUNET_CLIENT_connect ("fs", h->cfg);
- if (NULL == client)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to not connect to `%s' service.\n"), "fs");
- GNUNET_SCHEDULER_add_continuation (cont, cont_cls,
- GNUNET_SCHEDULER_REASON_TIMEOUT);
- return;
- }
- gic = GNUNET_malloc (sizeof (struct GetIndexedContext));
- gic->h = h;
- gic->client = client;
- gic->iterator = iterator;
- gic->iterator_cls = iterator_cls;
- gic->cont = cont;
- gic->cont_cls = cont_cls;
- msg.size = htons (sizeof (struct GNUNET_MessageHeader));
- msg.type = htons (GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_GET);
- GNUNET_assert (GNUNET_OK ==
- GNUNET_CLIENT_transmit_and_get_response (client, &msg,
- GNUNET_CONSTANTS_SERVICE_TIMEOUT,
- GNUNET_YES,
- &handle_index_info,
- gic));
- }
- /* end of fs_list_indexed.c */
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