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/*
This file is part of GNUnet.
(C)
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 peerstore/gnunet-service-peerstore.c
* @brief peerstore service implementation
* @author Omar Tarabai
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "peerstore.h"
/**
* Our configuration.
*/
static const struct GNUNET_CONFIGURATION_Handle *cfg;
/**
* Database plugin library name
*/
char *db_lib_name;
/**
* Database handle
*/
static struct GNUNET_PEERSTORE_PluginFunctions *db;
/**
* Task run during shutdown.
*
* @param cls unused
* @param tc unused
*/
static void
shutdown_task (void *cls,
const struct GNUNET_SCHEDULER_TaskContext *tc)
{
if(NULL != db_lib_name)
{
GNUNET_break (NULL == GNUNET_PLUGIN_unload (db_lib_name, db));
GNUNET_free (db_lib_name);
db_lib_name = NULL;
}
}
/**
* A client disconnected. Remove all of its data structure entries.
*
* @param cls closure, NULL
* @param client identification of the client
*/
static void
handle_client_disconnect (void *cls,
struct GNUNET_SERVER_Client
* client)
{
}
/**
* Handle a store request from client
*
* @param cls unused
* @param client identification of the client
* @param message the actual message
*/
void handle_store (void *cls,
struct GNUNET_SERVER_Client *client,
const struct GNUNET_MessageHeader *message)
{
struct StoreRequestMessage *sreqm;
struct GNUNET_SERVER_TransmitContext *tc;
struct StoreResponseMessage *sresm;
uint16_t msg_size;
char *sub_system;
msg_size = ntohs(message->size);
GNUNET_break_op(msg_size > sizeof(struct GNUNET_MessageHeader) + sizeof(struct StoreRequestMessage));
sreqm = (struct StoreRequestMessage *)&message[1];
sub_system = (char *)&sreqm[1];
GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Received a store request (size: %lu) for sub system `%s' and peer `%s'\n",
msg_size,
sub_system,
GNUNET_i2s (&sreqm->peer));
//TODO: do the actual storage
//create a fake response for testing
char *response = "This is a response";
uint16_t resp_size = strlen(response);
tc = GNUNET_SERVER_transmit_context_create (client);
msg_size = sizeof(struct StoreResponseMessage) + resp_size;
sresm = malloc(msg_size);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending a response to client of size: %u, response size: %u\n", msg_size, resp_size);
sresm->header.type = htons(GNUNET_MESSAGE_TYPE_PEERSTORE_STORE_RESULT);
sresm->header.size = htons(msg_size);
sresm->success = htons(GNUNET_NO);
sresm->emsg_size = htons(resp_size);
char *msg_ptr = (char *)&sresm[1];
memcpy(msg_ptr, response, resp_size);
GNUNET_SERVER_transmit_context_append_message(tc, (struct GNUNET_MessageHeader *)sresm);
GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
}
/**
* Peerstore service runner.
*
* @param cls closure
* @param server the initialized server
* @param c configuration to use
*/
static void
run (void *cls,
struct GNUNET_SERVER_Handle *server,
const struct GNUNET_CONFIGURATION_Handle *c)
{
static const struct GNUNET_SERVER_MessageHandler handlers[] = {
{&handle_store, NULL, GNUNET_MESSAGE_TYPE_PEERSTORE_STORE, 0},
{NULL, NULL, 0, 0}
};
char *database;
cfg = c;
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_string (cfg, "peerstore", "DATABASE",
&database))
GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "No database backend configured\n");
else
{
GNUNET_asprintf (&db_lib_name, "libgnunet_plugin_peerstore_%s", database);
db = GNUNET_PLUGIN_load(db_lib_name, (void *) cfg);
GNUNET_free(database);
}
if(NULL == db)
GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Could not load database backend `%s'\n", db_lib_name);
else
{
GNUNET_SERVER_add_handlers (server, handlers);
GNUNET_SERVER_disconnect_notify (server,
&handle_client_disconnect,
NULL);
}
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
&shutdown_task,
NULL);
}
/**
* The main function for the peerstore service.
*
* @param argc number of arguments from the command line
* @param argv command line arguments
* @return 0 ok, 1 on error
*/
int
main (int argc, char *const *argv)
{
return (GNUNET_OK ==
GNUNET_SERVICE_run (argc,
argv,
"peerstore",
GNUNET_SERVICE_OPTION_NONE,
&run, NULL)) ? 0 : 1;
}
/* end of gnunet-service-peerstore.c */
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