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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_api.h"
/**
* Context for "GNUNET_FS_get_indexed_files".
*/
struct GNUNET_FS_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 GNUNET_FS_GetIndexedContext*")
* @param msg message with indexing information
*/
static void
handle_index_info (void *cls, const struct GNUNET_MessageHeader *msg)
{
struct GNUNET_FS_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");
(void) gic->iterator (gic->iterator_cls, NULL, NULL);
GNUNET_FS_get_indexed_files_cancel (gic);
return;
}
if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_FS_INDEX_LIST_END)
{
/* normal end-of-list */
(void) gic->iterator (gic->iterator_cls, NULL, NULL);
GNUNET_FS_get_indexed_files_cancel (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");
(void) gic->iterator (gic->iterator_cls, NULL, NULL);
GNUNET_FS_get_indexed_files_cancel (gic);
return;
}
if (GNUNET_OK != gic->iterator (gic->iterator_cls, filename, &iim->file_id))
{
GNUNET_FS_get_indexed_files_cancel (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
* @return NULL on error ('iter' is not called)
*/
struct GNUNET_FS_GetIndexedContext *
GNUNET_FS_get_indexed_files (struct GNUNET_FS_Handle *h,
GNUNET_FS_IndexedFileProcessor iterator,
void *iterator_cls)
{
struct GNUNET_CLIENT_Connection *client;
struct GNUNET_FS_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");
return NULL;
}
gic = GNUNET_malloc (sizeof (struct GNUNET_FS_GetIndexedContext));
gic->h = h;
gic->client = client;
gic->iterator = iterator;
gic->iterator_cls = iterator_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));
return gic;
}
/**
* Cancel iteration over all indexed files.
*
* @param gic operation to cancel
*/
void
GNUNET_FS_get_indexed_files_cancel (struct GNUNET_FS_GetIndexedContext *gic)
{
GNUNET_CLIENT_disconnect (gic->client, GNUNET_NO);
GNUNET_free (gic);
}
/* end of fs_list_indexed.c */
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