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/*
This file is part of GNUnet.
(C) 2012 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 2, 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 lockmanager/gnunet-service-lockmanager.c
* @brief implementation of the LOCKMANAGER service
* @author Sree Harsha Totakura
*/
#include "platform.h"
#include "gnunet_common.h"
#include "gnunet_protocols.h"
#include "gnunet_service_lib.h"
#include "gnunet_server_lib.h"
#include "lockmanager.h"
#define LOG(kind,...) \
GNUNET_log_from (kind, "gnunet-service-lockmanager",__VA_ARGS__)
#define TIME_REL_MINS(min) \
GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, min)
#define TIMEOUT TIME_REL_MINS(3)
/**
* Transmit notify for sending message to client
*
* @param cls the message to send
* @param size number of bytes available in buf
* @param buf where the callee should write the message
* @return number of bytes written to buf
*/
static size_t
transmit_notify (void *cls, size_t size, void *buf)
{
struct GNUNET_LOCKMANAGER_Message *msg = cls;
uint16_t msg_size;
if ((0 == size) || (NULL == buf))
{
/* FIXME: Timed out -- requeue? */
return 0;
}
msg_size = ntohs (msg->header.size);
GNUNET_assert (size >= msg_size);
memcpy (buf, msg, msg_size);
GNUNET_free (msg);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Message of size %u sent\n", msg_size);
return msg_size;
}
/**
* Handler for GNUNET_MESSAGE_TYPE_LOCKMANAGER_ACQUIRE
*
* @param cls NULL
* @param client the client sending this message
* @param message GNUNET_MESSAGE_TYPE_LOCKMANAGER_ACQUIRE message
*/
static void
handle_acquire (void *cls,
struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
const struct GNUNET_LOCKMANAGER_Message *request;
struct GNUNET_LOCKMANAGER_Message *reply;
int16_t request_size;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Received an ACQUIRE message\n");
request = (struct GNUNET_LOCKMANAGER_Message *) message;
/* FIXME: Dummy implementation; just echos success for every lock */
request_size = ntohs (message->size);
reply = GNUNET_malloc (request_size);
memcpy (reply, request, request_size);
reply->header.type = htons (GNUNET_MESSAGE_TYPE_LOCKMANAGER_SUCCESS);
GNUNET_SERVER_notify_transmit_ready (client,
request_size,
TIMEOUT,
&transmit_notify,
reply);
GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
/**
* Handle for GNUNET_MESSAGE_TYPE_LOCKMANAGER_RELEASE
*
* @param
* @return
*/
static void
handle_release (void *cls,
struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Received a RELEASE message\n");
GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
/**
* Lock manager setup
*
* @param cls closure
* @param server the initialized server
* @param cfg configuration to use
*/
static void
lockmanager_run (void *cls,
struct GNUNET_SERVER_Handle * server,
const struct GNUNET_CONFIGURATION_Handle *cfg)
{
static const struct GNUNET_SERVER_MessageHandler message_handlers[] =
{
{&handle_acquire, NULL, GNUNET_MESSAGE_TYPE_LOCKMANAGER_ACQUIRE, 0},
{&handle_release, NULL, GNUNET_MESSAGE_TYPE_LOCKMANAGER_RELEASE, 0},
{NULL}
};
LOG (GNUNET_ERROR_TYPE_DEBUG, "Starting lockmanager\n");
GNUNET_SERVER_add_handlers (server,
message_handlers);
}
/**
* The starting point of execution
*/
int main (int argc, char *const *argv)
{
int ret;
LOG (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
ret =
(GNUNET_OK ==
GNUNET_SERVICE_run (argc,
argv,
"lockmanager",
GNUNET_SERVICE_OPTION_NONE,
&lockmanager_run,
NULL)) ? 0 : 1;
LOG (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
return ret;
}
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