gnunet-search.c File Reference

searching for files on GNUnet More...

#include "platform.h"
#include "gnunet_fs_service.h"

Include dependency graph for gnunet-search.c:

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Functions
static int	item_printer (void *cls, const char *plugin_name, enum EXTRACTOR_MetaType type, enum EXTRACTOR_MetaFormat format, const char *data_mime_type, const char *data, size_t data_size)
	Type of a function that libextractor calls for each meta data item found. More...
static void	clean_task (void *cls)
static void *	progress_cb (void *cls, const struct GNUNET_FS_ProgressInfo *info)
	Called by FS client to give information about the progress of an operation. More...
static void	shutdown_task (void *cls)
static void	timeout_task (void *cls)
static void	run (void *cls, char *const *args, const char *cfgfile, const struct GNUNET_CONFIGURATION_Handle *c)
	Main function that will be run by the scheduler. More...
int	main (int argc, char *const *argv)
	The main function to search GNUnet. More...

Variables
static int	ret
static const struct GNUNET_CONFIGURATION_Handle *	cfg
static struct GNUNET_FS_Handle *	ctx
static struct GNUNET_FS_SearchContext *	sc
static char *	output_filename
static struct GNUNET_FS_DirectoryBuilder *	db
static unsigned int	anonymity = 1
static struct GNUNET_TIME_Relative	timeout
	Timeout for the search, 0 means to wait for CTRL-C. More...
static unsigned int	results_limit
static unsigned int	results
static unsigned int	verbose
static int	local_only
static struct GNUNET_SCHEDULER_Task *	tt

Detailed Description

searching for files on GNUnet

Author

Christian Grothoff

Krista Bennett

James Blackwell

Igor Wronsky

Definition in file gnunet-search.c.

Function Documentation

item_printer()

static int item_printer ( void *  cls, const char *  plugin_name, enum EXTRACTOR_MetaType  type, enum EXTRACTOR_MetaFormat  format, const char *  data_mime_type, const char *  data, size_t  data_size  )

static

Type of a function that libextractor calls for each meta data item found.

Parameters

cls	closure (user-defined, unused)
plugin_name	name of the plugin that produced this value; special values can be used (i.e. '<zlib>' for zlib being used in the main libextractor library and yielding meta data).
type	libextractor-type describing the meta data
format	basic format information about data
data_mime_type	mime-type of data (not of the original file); can be NULL (if mime-type is not known)
data	actual meta-data found
data_size	number of bytes in data

Returns

0 to continue extracting, 1 to abort

Definition at line 79 of file gnunet-search.c.

References dgettext, EXTRACTOR_METAFORMAT_C_STRING, EXTRACTOR_METAFORMAT_UTF8, EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME, and LIBEXTRACTOR_GETTEXT_DOMAIN.

Referenced by progress_cb().

{
  if ((format != EXTRACTOR_METAFORMAT_UTF8) &&
      (format != EXTRACTOR_METAFORMAT_C_STRING))
    return 0;
  if (type == EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME)
    return 0;
#if HAVE_LIBEXTRACTOR
  printf ("\t%20s: %s\n",
          dgettext (LIBEXTRACTOR_GETTEXT_DOMAIN,
                    EXTRACTOR_metatype_to_string (type)),
          data);
#else
  printf ("\t%20d: %s\n", type, data);
#endif
  return 0;
}

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clean_task()

static void clean_task ( void *  cls )

static

Definition at line 105 of file gnunet-search.c.

References _, GNUNET_break, GNUNET_DISK_fn_write(), GNUNET_DISK_PERM_USER_READ, GNUNET_DISK_PERM_USER_WRITE, GNUNET_free, GNUNET_free_non_null, GNUNET_FS_directory_builder_finish(), GNUNET_FS_stop(), GNUNET_OK, and output_filename.

Referenced by progress_cb().

{
  size_t dsize;
  void *ddata;

  GNUNET_FS_stop (ctx);
  ctx = NULL;
  if (output_filename == NULL)
    return;
  if (GNUNET_OK != GNUNET_FS_directory_builder_finish (db, &dsize, &ddata))
  {
    GNUNET_break (0);
    GNUNET_free (output_filename);
    return;
  }
  if (dsize != GNUNET_DISK_fn_write (output_filename,
                                     ddata,
                                     dsize,
                                     GNUNET_DISK_PERM_USER_READ
                                     | GNUNET_DISK_PERM_USER_WRITE))
  {
    fprintf (stderr,
             _ ("Failed to write directory with search results to `%s'\n"),
             output_filename);
  }
  GNUNET_free_non_null (ddata);
  GNUNET_free (output_filename);
}

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progress_cb()

static void* progress_cb ( void *  cls, const struct GNUNET_FS_ProgressInfo *  info  )

static

Called by FS client to give information about the progress of an operation.

Parameters

cls	closure
info	details about the event, specifying the event type and various bits about the event

Returns

client-context (for the next progress call for this operation; should be set to NULL for SUSPEND and STOPPED events). The value returned will be passed to future callbacks in the respective field in the GNUNET_FS_ProgressInfo struct.

Definition at line 149 of file gnunet-search.c.

References _, clean_task(), EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME, filename, GNUNET_CONTAINER_meta_data_get_by_type(), GNUNET_CONTAINER_meta_data_iterate(), GNUNET_DISK_filename_canonicalize(), GNUNET_free, GNUNET_free_non_null, GNUNET_FS_directory_builder_add(), GNUNET_FS_DIRECTORY_EXT, GNUNET_FS_meta_data_test_for_directory(), GNUNET_FS_STATUS_SEARCH_ERROR, GNUNET_FS_STATUS_SEARCH_RESULT, GNUNET_FS_STATUS_SEARCH_RESULT_STOPPED, GNUNET_FS_STATUS_SEARCH_START, GNUNET_FS_STATUS_SEARCH_STOPPED, GNUNET_FS_STATUS_SEARCH_UPDATE, GNUNET_FS_uri_to_string(), GNUNET_SCHEDULER_add_now(), GNUNET_SCHEDULER_shutdown(), GNUNET_YES, item_printer(), results, results_limit, GNUNET_FS_ProgressInfo::search, GNUNET_FS_ProgressInfo::status, uri, GNUNET_FS_ProgressInfo::value, and verbose.

Referenced by run().

{
  static unsigned int cnt;
  int is_directory;
  char *uri;
  char *filename;

  switch (info->status)
  {
  case GNUNET_FS_STATUS_SEARCH_START:
    break;

  case GNUNET_FS_STATUS_SEARCH_RESULT:
    if (db != NULL)
      GNUNET_FS_directory_builder_add (db,
                                       info->value.search.specifics.result.uri,
                                       info->value.search.specifics.result.meta,
                                       NULL);
    uri = GNUNET_FS_uri_to_string (info->value.search.specifics.result.uri);
    printf ("#%u:\n", ++cnt);
    filename = GNUNET_CONTAINER_meta_data_get_by_type (
      info->value.search.specifics.result.meta,
      EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME);
    is_directory = GNUNET_FS_meta_data_test_for_directory (
      info->value.search.specifics.result.meta);
    if (NULL != filename)
    {
      while ((filename[0] != '\0') && ('/' == filename[strlen (filename) - 1]))
        filename[strlen (filename) - 1] = '\0';
      GNUNET_DISK_filename_canonicalize (filename);
      if (GNUNET_YES == is_directory)
        printf ("gnunet-download -o \"%s%s\" -R %s\n",
                filename,
                GNUNET_FS_DIRECTORY_EXT,
                uri);
      else
        printf ("gnunet-download -o \"%s\" %s\n", filename, uri);
    }
    else if (GNUNET_YES == is_directory)
      printf ("gnunet-download -o \"collection%s\" -R %s\n",
              GNUNET_FS_DIRECTORY_EXT,
              uri);
    else
      printf ("gnunet-download %s\n", uri);
    if (verbose)
      GNUNET_CONTAINER_meta_data_iterate (info->value.search.specifics.result
                                          .meta,
                                          &item_printer,
                                          NULL);
    printf ("\n");
    fflush (stdout);
    GNUNET_free_non_null (filename);
    GNUNET_free (uri);
    results++;
    if ((results_limit > 0) && (results >= results_limit))
      GNUNET_SCHEDULER_shutdown ();
    break;

  case GNUNET_FS_STATUS_SEARCH_UPDATE:
    break;

  case GNUNET_FS_STATUS_SEARCH_RESULT_STOPPED:
    /* ignore */
    break;

  case GNUNET_FS_STATUS_SEARCH_ERROR:
    fprintf (stderr,
             _ ("Error searching: %s.\n"),
             info->value.search.specifics.error.message);
    GNUNET_SCHEDULER_shutdown ();
    break;

  case GNUNET_FS_STATUS_SEARCH_STOPPED:
    GNUNET_SCHEDULER_add_now (&clean_task, NULL);
    break;

  default:
    fprintf (stderr, _ ("Unexpected status: %d\n"), info->status);
    break;
  }
  return NULL;
}

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shutdown_task()

static void shutdown_task ( void *  cls )

static

Definition at line 234 of file gnunet-search.c.

References GNUNET_FS_search_stop().

Referenced by run().

{
  if (sc != NULL)
  {
    GNUNET_FS_search_stop (sc);
    sc = NULL;
  }
}

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timeout_task()

static void timeout_task ( void *  cls )

static

Definition at line 245 of file gnunet-search.c.

References GNUNET_SCHEDULER_shutdown().

Referenced by run().

{
  tt = NULL;
  GNUNET_SCHEDULER_shutdown ();
}

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run()

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

static

Main function that will be run by the scheduler.

Parameters

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

Definition at line 261 of file gnunet-search.c.

References _, anonymity, GNUNET_FS_directory_builder_create(), GNUNET_FS_FLAGS_NONE, GNUNET_FS_OPTIONS_END, GNUNET_FS_SEARCH_OPTION_LOOPBACK_ONLY, GNUNET_FS_SEARCH_OPTION_NONE, GNUNET_FS_search_start(), GNUNET_FS_start(), GNUNET_FS_stop(), GNUNET_FS_uri_destroy(), GNUNET_FS_uri_ksk_create_from_args(), GNUNET_SCHEDULER_add_delayed(), GNUNET_SCHEDULER_add_shutdown(), local_only, options, output_filename, progress_cb(), GNUNET_TIME_Relative::rel_value_us, ret, shutdown_task(), timeout, timeout_task(), and uri.

Referenced by main().

{
  struct GNUNET_FS_Uri *uri;
  unsigned int argc;
  enum GNUNET_FS_SearchOptions options;

  argc = 0;
  while (NULL != args[argc])
    argc++;
  uri = GNUNET_FS_uri_ksk_create_from_args (argc, (const char **) args);
  if (NULL == uri)
  {
    fprintf (stderr,
             "%s",
             _ ("Could not create keyword URI from arguments.\n"));
    ret = 1;
    return;
  }
  cfg = c;
  ctx = GNUNET_FS_start (cfg,
                         "gnunet-search",
                         &progress_cb,
                         NULL,
                         GNUNET_FS_FLAGS_NONE,
                         GNUNET_FS_OPTIONS_END);
  if (NULL == ctx)
  {
    fprintf (stderr, _ ("Could not initialize `%s' subsystem.\n"), "FS");
    GNUNET_FS_uri_destroy (uri);
    ret = 1;
    return;
  }
  if (output_filename != NULL)
    db = GNUNET_FS_directory_builder_create (NULL);
  options = GNUNET_FS_SEARCH_OPTION_NONE;
  if (local_only)
    options |= GNUNET_FS_SEARCH_OPTION_LOOPBACK_ONLY;
  sc = GNUNET_FS_search_start (ctx, uri, anonymity, options, NULL);
  GNUNET_FS_uri_destroy (uri);
  if (NULL == sc)
  {
    fprintf (stderr, "%s", _ ("Could not start searching.\n"));
    GNUNET_FS_stop (ctx);
    ret = 1;
    return;
  }
  if (0 != timeout.rel_value_us)
    tt = GNUNET_SCHEDULER_add_delayed (timeout, &timeout_task, NULL);
  GNUNET_SCHEDULER_add_shutdown (&shutdown_task, NULL);
}

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main()

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

The main function to search GNUnet.

Parameters

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

Returns

0 ok, 1 on error

Definition at line 324 of file gnunet-search.c.

References anonymity, gettext_noop, GNUNET_free, GNUNET_GETOPT_OPTION_END, GNUNET_GETOPT_option_flag(), GNUNET_GETOPT_option_relative_time(), GNUNET_GETOPT_option_string(), GNUNET_GETOPT_option_uint(), GNUNET_GETOPT_option_verbose(), GNUNET_OK, GNUNET_PROGRAM_run(), GNUNET_STRINGS_get_utf8_args(), local_only, output_filename, results_limit, ret, run(), timeout, and verbose.

{
  struct GNUNET_GETOPT_CommandLineOption options[] =
  { GNUNET_GETOPT_option_uint ('a',
                               "anonymity",
                               "LEVEL",
                               gettext_noop (
                                 "set the desired LEVEL of receiver-anonymity"),
                               &anonymity),
    GNUNET_GETOPT_option_flag (
      'n',
      "no-network",
      gettext_noop ("only search the local peer (no P2P network search)"),
      &local_only),
    GNUNET_GETOPT_option_string (
      'o',
      "output",
      "PREFIX",
      gettext_noop ("write search results to file starting with PREFIX"),
      &output_filename),
    GNUNET_GETOPT_option_relative_time (
      't',
      "timeout",
      "DELAY",
      gettext_noop ("automatically terminate search after DELAY"),
      &timeout),
    GNUNET_GETOPT_option_verbose (&verbose),
    GNUNET_GETOPT_option_uint ('N',
                               "results",
                               "VALUE",
                               gettext_noop ("automatically terminate search "
                                             "after VALUE results are found"),
                               &results_limit),
    GNUNET_GETOPT_OPTION_END };

  if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
    return 2;

  ret =
    (GNUNET_OK ==
     GNUNET_PROGRAM_run (argc,
                         argv,
                         "gnunet-search [OPTIONS] KEYWORD",
                         gettext_noop (
                           "Search GNUnet for files that were published on GNUnet"),
                         options,
                         &run,
                         NULL))
    ? ret
    : 1;
  GNUNET_free ((void *) argv);
  return ret;
}

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Variable Documentation

ret

int ret

static

Definition at line 31 of file gnunet-search.c.

Referenced by main(), and run().

cfg

const struct GNUNET_CONFIGURATION_Handle* cfg

static

Definition at line 33 of file gnunet-search.c.

ctx

struct GNUNET_FS_Handle* ctx

static

Definition at line 35 of file gnunet-search.c.

sc

struct GNUNET_FS_SearchContext* sc

static

Definition at line 37 of file gnunet-search.c.

Referenced by call_completion_task(), connect_cb(), continue_writing(), database_setup(), datacache_get_successors_iterator(), deserialize_search(), deserialize_search_file(), deserialize_search_result(), disconnect_cb(), extract_box_cb(), find_sender_by_address(), GNUNET_FS_search_make_status_(), GNUNET_HELLO_extract_address(), GNUNET_PEERSTORE_disconnect(), GNUNET_PEERSTORE_store(), GNUNET_TESTBED_get_statistics(), GNUNET_TRANSPORT_TESTING_large_send(), GNUNET_TRANSPORT_TESTING_simple_send(), handle_client_start_search(), handle_datastore_reply(), handle_request(), iteration_completion_cb(), iterator_cb(), locate_by_id(), op_done_task(), opc_search_iterator(), oprelease_get_stats(), opstart_get_stats(), process_ksk_result(), process_sblock(), process_sks_result(), reconnect(), schedule_transmit_search_request(), search_iterator(), search_start(), server_access_cb(), server_disconnect_cb(), server_lookup_connection(), server_send_callback(), service_run_main(), signal_download_resume(), signal_socks_failure(), store_request_sent(), and timeout_cadet_task().

output_filename

char* output_filename

static

Definition at line 39 of file gnunet-search.c.

Referenced by clean_task(), main(), and run().

db

struct GNUNET_FS_DirectoryBuilder* db

static

Definition at line 41 of file gnunet-search.c.

Referenced by GNUNET_PQ_connect(), GNUNET_PQ_connect_with_cfg(), and publish_content().

anonymity

unsigned int anonymity = 1

static

Definition at line 43 of file gnunet-search.c.

Referenced by main(), and run().

timeout

struct GNUNET_TIME_Relative timeout

static

Timeout for the search, 0 means to wait for CTRL-C.

Definition at line 48 of file gnunet-search.c.

Referenced by main(), and run().

results_limit

unsigned int results_limit

static

Definition at line 50 of file gnunet-search.c.

Referenced by main(), and progress_cb().

results

unsigned int results

static

Definition at line 52 of file gnunet-search.c.

Referenced by progress_cb().

verbose

unsigned int verbose

static

Definition at line 54 of file gnunet-search.c.

Referenced by main(), and progress_cb().

local_only

int local_only

static

Definition at line 56 of file gnunet-search.c.

Referenced by main(), and run().

tt

struct GNUNET_SCHEDULER_Task* tt

static

Definition at line 58 of file gnunet-search.c.