gnunet-dht-hello.c File Reference

Obtain HELLO from DHT for bootstrapping. More...

#include "platform.h"
#include "gnunet_dht_service.h"

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Macros
#define	LOG(kind, ...)   GNUNET_log_from (kind, "dht-clients", __VA_ARGS__)

Functions
static void	cleanup_task (void *cls)
	Task run to clean up on shutdown. More...
static void	hello_done_cb (void *cls)
	Task run when we are finished. More...
static void	hello_result_cb (void *cls, const char *url)
	Function called on our HELLO. More...
static void	run (void *cls, char *const *args, const char *cfgfile, const struct GNUNET_CONFIGURATION_Handle *cfg)
	Main function that will be run by the scheduler. More...
int	main (int argc, char *const *argv)
	Entry point for gnunet-dht-hello. More...

Variables
static struct GNUNET_DHT_Handle *	dht_handle
	Handle to the DHT. More...
static struct GNUNET_DHT_HelloGetHandle *	get_hello_handle
	Handle to the DHT hello get operation. More...
static int	global_ret
	Global status value. More...

Detailed Description

Obtain HELLO from DHT for bootstrapping.

Author

Christian Grothoff

Definition in file gnunet-dht-hello.c.

Macro Definition Documentation

LOG

#define LOG	(		kind,
			...
	)		GNUNET_log_from (kind, "dht-clients", __VA_ARGS__)

Definition at line 28 of file gnunet-dht-hello.c.

Function Documentation

cleanup_task()

static void cleanup_task ( void *  cls )

static

Task run to clean up on shutdown.

Parameters

cls

unused

Definition at line 52 of file gnunet-dht-hello.c.

{
  if (NULL != get_hello_handle)
  {
    GNUNET_DHT_hello_get_cancel (get_hello_handle);
    get_hello_handle = NULL;
  }
  if (NULL != dht_handle)
  {
    GNUNET_DHT_disconnect (dht_handle);
    dht_handle = NULL;
  }
}

References dht_handle, get_hello_handle, GNUNET_DHT_disconnect(), and GNUNET_DHT_hello_get_cancel().

Referenced by run().

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hello_done_cb()

static void hello_done_cb ( void *  cls )

static

Task run when we are finished.

Triggers shutdown.

Parameters

cls

unused

Definition at line 73 of file gnunet-dht-hello.c.

{
  GNUNET_SCHEDULER_shutdown ();
}

References GNUNET_SCHEDULER_shutdown().

Referenced by run().

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hello_result_cb()

static void hello_result_cb ( void *  cls, const char *  url  )

static

Function called on our HELLO.

Parameters

cls	closure
url	the HELLO URL

Definition at line 86 of file gnunet-dht-hello.c.

{
  get_hello_handle = NULL;
  fprintf (stdout,
           "%s\n",
           url);
  GNUNET_SCHEDULER_shutdown ();
}

References get_hello_handle, and GNUNET_SCHEDULER_shutdown().

Referenced by run().

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run()

static void run ( void *  cls, char *const *  args, const char *  cfgfile, const struct GNUNET_CONFIGURATION_Handle *  cfg  )

static

Main function that will be run by the scheduler.

Parameters

cls	closure, NULL
args	remaining command-line arguments
cfgfile	name of the configuration file used (for saving, can be NULL!)
cfg	configuration

Definition at line 106 of file gnunet-dht-hello.c.

{
  (void) cls;
  (void) cfgfile;
  GNUNET_SCHEDULER_add_shutdown (&cleanup_task,
                                 NULL);
  if (NULL == (dht_handle = GNUNET_DHT_connect (cfg,
                                                1)))
  {
    fprintf (stderr,
             _ ("Failed to connect to DHT service!\n"));
    global_ret = EXIT_NOTCONFIGURED;
    GNUNET_SCHEDULER_shutdown ();
    return;
  }
  if (NULL == args[0])
  {
    get_hello_handle = GNUNET_DHT_hello_get (dht_handle,
                                             &hello_result_cb,
                                             NULL);
    GNUNET_break (NULL != get_hello_handle);
  }
  else
  {
    GNUNET_DHT_hello_offer (dht_handle,
                            args[0],
                            &hello_done_cb,
                            NULL);
  }
}

References _, consensus-simulation::args, cfg, cleanup_task(), dht_handle, EXIT_NOTCONFIGURED, get_hello_handle, global_ret, GNUNET_break, GNUNET_DHT_connect(), GNUNET_DHT_hello_get(), GNUNET_DHT_hello_offer(), GNUNET_SCHEDULER_add_shutdown(), GNUNET_SCHEDULER_shutdown(), hello_done_cb(), and hello_result_cb().

Referenced by main().

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main()

int main	(	int	argc,
		char *const *	argv
	)

Entry point for gnunet-dht-hello.

Parameters

argc	number of arguments from the command line
argv	command line arguments

Returns

0 ok, 1 on error

Definition at line 149 of file gnunet-dht-hello.c.

{
  struct GNUNET_GETOPT_CommandLineOption options[] = {
    GNUNET_GETOPT_OPTION_END
  };
  enum GNUNET_GenericReturnValue iret;
 
  if (GNUNET_OK !=
      GNUNET_STRINGS_get_utf8_args (argc, argv,
                                    &argc, &argv))
    return 2;
  iret = GNUNET_PROGRAM_run (
    argc,
    argv,
    "gnunet-dht-hello [URL]",
    gettext_noop (
      "Obtain HELLO from DHT or provide HELLO to DHT for bootstrapping"),
    options,
    &run,
    NULL);
  if (GNUNET_SYSERR == iret)
    return EXIT_FAILURE;
  if (GNUNET_NO == iret)
    return EXIT_SUCCESS;
  return global_ret;
}

References gettext_noop, global_ret, GNUNET_GETOPT_OPTION_END, GNUNET_NO, GNUNET_OK, GNUNET_PROGRAM_run(), GNUNET_STRINGS_get_utf8_args(), GNUNET_SYSERR, options, and run().

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Variable Documentation

dht_handle

struct GNUNET_DHT_Handle* dht_handle

static

Handle to the DHT.

Definition at line 33 of file gnunet-dht-hello.c.

Referenced by cleanup_task(), and run().

get_hello_handle

struct GNUNET_DHT_HelloGetHandle* get_hello_handle

static

Handle to the DHT hello get operation.

Definition at line 38 of file gnunet-dht-hello.c.

Referenced by cleanup_task(), hello_result_cb(), and run().

global_ret

int global_ret

static

Global status value.

Definition at line 43 of file gnunet-dht-hello.c.

Referenced by main(), and run().