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/*
This file is part of GNUnet.
(C) 2009, 2010 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 namestore/namestore_common.c
* @brief API to access the NAMESTORE service
* @author Martin Schanzenbach
* @author Matthias Wachs
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_constants.h"
#include "gnunet_arm_service.h"
#include "gnunet_namestore_service.h"
#include "namestore.h"
#define DEBUG_GNS_API GNUNET_EXTRA_LOGGING
#define LOG(kind,...) GNUNET_log_from (kind, "gns-api",__VA_ARGS__)
/**
* Serialize an array of GNUNET_NAMESTORE_RecordData *rd to transmit over the
* network
*
* @param dest where to write the serialized data
* @param rd_count number of elements in array
* @param rd array
*
* @return number of bytes written to destination dest
*/
size_t
GNUNET_NAMESTORE_records_serialize (char ** dest,
unsigned int rd_count,
const struct GNUNET_NAMESTORE_RecordData *rd)
{
//size_t len = 0;
struct GNUNET_NAMESTORE_NetworkRecord * nr;
char * d = (*dest);
int c = 0;
int offset;
size_t total_len = rd_count * sizeof (struct GNUNET_NAMESTORE_NetworkRecord);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Struct size: %u\n", total_len);
/* figure out total len required */
for (c = 0; c < rd_count; c ++)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Data size record[%i] : %u\n", c, rd[c].data_size);
total_len += rd[c].data_size;
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Serializing %i records with total length of %llu\n", rd_count, total_len);
(*dest) = GNUNET_malloc (total_len);
d = (*dest);
/* copy records */
offset = 0;
for (c = 0; c < rd_count; c ++)
{
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Serialized record [%i]: data_size %i\n", c,rd[c].data_size);
nr = (struct GNUNET_NAMESTORE_NetworkRecord *) &d[offset];
nr->data_size = htonl (rd[c].data_size);
nr->flags = htonl (rd[c].flags);
nr->record_type = htonl (rd[c].record_type);
nr->expiration = GNUNET_TIME_absolute_hton(rd[c].expiration);
/*put data here */
offset += sizeof (struct GNUNET_NAMESTORE_NetworkRecord);
memcpy (&d[offset], rd[c].data, rd[c].data_size);
offset += rd[c].data_size;
}
GNUNET_assert (offset == total_len);
return total_len;
}
/**
* Deserialize an array of GNUNET_NAMESTORE_RecordData *rd after transmission
* over the network
*
* @param source where to read the data to deserialize
* @param rd_count number of elements in array
* @param rd array
*
* @return number of elements deserialized
*/
int
GNUNET_NAMESTORE_records_deserialize ( struct GNUNET_NAMESTORE_RecordData **dest, char *src, size_t len)
{
struct GNUNET_NAMESTORE_NetworkRecord * nr;
struct GNUNET_NAMESTORE_RecordData *d = (*dest);
int elements;
size_t offset;
uint32_t data_size;
int c;
offset = 0;
elements = 0;
while (offset < len)
{
nr = (struct GNUNET_NAMESTORE_NetworkRecord *) &src[offset];
offset += sizeof (struct GNUNET_NAMESTORE_NetworkRecord);
data_size = ntohl (nr->data_size);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Datasize record[%i]: %u\n", elements, data_size);
offset += data_size;
elements ++;
}
GNUNET_assert (len == offset);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Deserializing %i records with total length of %u\n", elements, len);
(*dest) = GNUNET_malloc (elements * sizeof (struct GNUNET_NAMESTORE_RecordData));
d = (*dest);
offset = 0;
for (c = 0; c < elements; c++)
{
nr = (struct GNUNET_NAMESTORE_NetworkRecord *) &src[offset];
d[c].expiration = GNUNET_TIME_absolute_ntoh(nr->expiration);
d[c].record_type = ntohl (nr->record_type);
d[c].flags = ntohl (nr->flags);
d[c].data_size = ntohl (nr->data_size);
d[c].data = GNUNET_malloc (d[c].data_size);
GNUNET_assert (d[c].data != NULL);
offset += sizeof (struct GNUNET_NAMESTORE_NetworkRecord);
memcpy((char *) d[c].data, &src[offset], d[c].data_size);
offset += d[c].data_size;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Deserialized record[%i] /w data_size %i\n", c, d[c].data_size);
}
GNUNET_assert(offset == len);
return elements;
}
/* end of namestore_api.c */
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