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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 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 testbed/gnunet-testbed-helper.c
* @brief Helper binary that is started from a remote controller to start
* gnunet-service-testbed. This binary also receives configuration
* from the remove controller which is put in a temporary location
* with ports and paths fixed so that gnunet-service-testbed runs
* without any hurdels. This binary also kills the testbed service
* should the connection from the remote controller is dropped
* @author Sree Harsha Totakura <sreeharsha@totakura.in>
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_testing_lib-new.h"
#include "testbed_helper.h"
/**
* Generic debug logging shortcut
*/
#define LOG_DEBUG(...) \
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
/**
* Handle to the testing system
*/
static struct GNUNET_TESTING_System *test_system;
/**
* Our message stream tokenizer
*/
struct GNUNET_SERVER_MessageStreamTokenizer *tokenizer;
/**
* Disk handle from stdin
*/
static struct GNUNET_DISK_FileHandle *stdin_fd;
/**
* Message receive buffer
*/
static void *buf;
/**
* The size of the above buffer
*/
static size_t buf_size;
/**
* Task identifier for the read task
*/
static GNUNET_SCHEDULER_TaskIdentifier read_task_id;
/**
* Task identifier for the shutdown task
*/
static GNUNET_SCHEDULER_TaskIdentifier shutdown_task_id;
/**
* Task to shutting down nicely
*
* @param cls NULL
* @return tc the task context
*/
static void
shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
if (GNUNET_SCHEDULER_NO_TASK != read_task_id)
GNUNET_SCHEDULER_cancel (read_task_id);
(void) GNUNET_DISK_file_close (stdin_fd);
GNUNET_free_non_null (buf);
GNUNET_SERVER_mst_destroy (tokenizer);
if (NULL != test_system)
GNUNET_TESTING_system_destroy (test_system, GNUNET_YES);
}
/**
* Functions with this signature are called whenever a
* complete message is received by the tokenizer.
*
* Do not call GNUNET_SERVER_mst_destroy in callback
*
* @param cls closure
* @param client identification of the client
* @param message the actual message
*
* @return GNUNET_OK on success, GNUNET_SYSERR to stop further processing
*/
static int
tokenizer_cb (void *cls, void *client,
const struct GNUNET_MessageHeader *message)
{
GNUNET_break (0);
return GNUNET_OK;
}
/**
* Task to read from stdin
*
* @param cls NULL
* @return tc the task context
*/
static void
read_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
ssize_t sread;
static int ignore_reading = GNUNET_NO;
int ret;
read_task_id = GNUNET_SCHEDULER_NO_TASK;
if (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason)
return;
sread = GNUNET_DISK_file_read (stdin_fd, buf, buf_size);
if (GNUNET_SYSERR == sread)
{
GNUNET_break (0); /* FIXME: stdin closed - kill child */
GNUNET_SCHEDULER_cancel (shutdown_task_id);
shutdown_task_id = GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
return;
}
LOG_DEBUG ("Read %u bytes\n", sread);
read_task_id = /* No timeout while reading */
GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
stdin_fd, &read_task, NULL);
if (GNUNET_YES == ignore_reading)
return;
ret = GNUNET_SERVER_mst_receive (tokenizer, NULL, buf, sread,
GNUNET_YES, GNUNET_YES);
GNUNET_assert (GNUNET_SYSERR != ret);
if (GNUNET_NO == ret)
{
LOG_DEBUG ("We only listen for 1 message -- ignoring others\n");
ignore_reading = GNUNET_YES;
}
}
/**
* Main function that will be run.
*
* @param cls closure
* @param args remaining command-line arguments
* @param cfgfile name of the configuration file used (for saving, can be NULL!)
* @param cfg configuration
*/
static void
run (void *cls, char *const *args, const char *cfgfile,
const struct GNUNET_CONFIGURATION_Handle * cfg)
{
tokenizer = GNUNET_SERVER_mst_create (&tokenizer_cb, NULL);
stdin_fd = GNUNET_DISK_get_handle_from_native (stdin);
buf_size = sizeof (struct GNUNET_TESTBED_HelperInit) + 8 * 1024;
buf = GNUNET_malloc (buf_size);
read_task_id = /* No timeout while reading */
GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
stdin_fd, &read_task, NULL);
shutdown_task_id =
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
&shutdown_task, NULL);
}
/**
* Main function
*
* @param argc the number of command line arguments
* @param argv command line arg array
* @return return code
*/
int main (int argc, char **argv)
{
struct GNUNET_GETOPT_CommandLineOption options[] = {
GNUNET_GETOPT_OPTION_END
};
if (GNUNET_OK !=
GNUNET_PROGRAM_run ( argc, argv, "gnunet-testbed-helper",
"Helper for starting gnunet-service-testbed",
options, &run, NULL))
return 1;
else return 0;
}
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