gnunet-daemon-hostlist_client.h File Reference

hostlist support. More...

#include "gnunet_core_service.h"
#include "gnunet_statistics_service.h"
#include "gnunet_util_lib.h"

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Typedefs
typedef void(*	GNUNET_HOSTLIST_UriHandler) (const char *uri)
	Function that handles an advertised URI.

Functions
int	GNUNET_HOSTLIST_client_start (const struct GNUNET_CONFIGURATION_Handle *c, struct GNUNET_STATISTICS_Handle *st, GNUNET_CORE_ConnectEventHandler *ch, GNUNET_CORE_DisconnectEventHandler *dh, GNUNET_HOSTLIST_UriHandler *msgh, int learn)
	Start downloading hostlists from hostlist servers as necessary.
void	GNUNET_HOSTLIST_client_stop (void)
	Stop downloading hostlists from hostlist servers as necessary.

Detailed Description

hostlist support.

Downloads HELLOs via HTTP.

Author

Christian Grothoff

Definition in file gnunet-daemon-hostlist_client.h.

Typedef Documentation

GNUNET_HOSTLIST_UriHandler

typedef void(* GNUNET_HOSTLIST_UriHandler) (const char *uri)

Function that handles an advertised URI.

Parameters

uri	0-termianted URI of a hostlist

Definition at line 38 of file gnunet-daemon-hostlist_client.h.

Function Documentation

GNUNET_HOSTLIST_client_start()

int GNUNET_HOSTLIST_client_start	(	const struct GNUNET_CONFIGURATION_Handle *	c,
		struct GNUNET_STATISTICS_Handle *	st,
		GNUNET_CORE_ConnectEventHandler *	ch,
		GNUNET_CORE_DisconnectEventHandler *	dh,
		GNUNET_HOSTLIST_UriHandler *	msgh,
		int	learn
	)

Start downloading hostlists from hostlist servers as necessary.

Parameters

	c	configuration to use
	st	statistics handle to use
[out]	ch	set to handler for CORE connect events
[out]	dh	set to handler for CORE disconnect events
[out]	msgh	set to handler for CORE advertisement messages
	learn	should we learn hostlist URLs from CORE

Returns

GNUNET_OK on success

Definition at line 1650 of file gnunet-daemon-hostlist_client.c.

{
  char *filename;
  char *proxytype_str;
  int result;
 
  GNUNET_assert (NULL != st);
  if (0 != curl_global_init (CURL_GLOBAL_WIN32))
  {
    GNUNET_break (0);
    return GNUNET_SYSERR;
  }
  cfg = c;
  stats = st;
 
  /* Read proxy configuration */
  peerstore = GNUNET_PEERSTORE_connect (c);
  if (GNUNET_OK ==
      GNUNET_CONFIGURATION_get_value_string (cfg, "HOSTLIST", "PROXY", &proxy))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found proxy host: `%s'\n", proxy);
    /* proxy username */
    if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (cfg,
                                                            "HOSTLIST",
                                                            "PROXY_USERNAME",
                                                            &proxy_username))
    {
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "Found proxy username name: `%s'\n",
                  proxy_username);
    }
 
    /* proxy password */
    if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (cfg,
                                                            "HOSTLIST",
                                                            "PROXY_PASSWORD",
                                                            &proxy_password))
    {
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "Found proxy password name: `%s'\n",
                  proxy_password);
    }
 
    /* proxy type */
    if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (cfg,
                                                            "HOSTLIST",
                                                            "PROXY_TYPE",
                                                            &proxytype_str))
    {
      if (GNUNET_OK != GNUNET_STRINGS_utf8_toupper (proxytype_str,
                                                    proxytype_str))
        GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                    "Unable to convert `%s' to UTF-8 uppercase\n",
                    proxytype_str);
      proxy_type = CURLPROXY_HTTP;
      if (0 == strcmp (proxytype_str, "HTTP"))
        proxy_type = CURLPROXY_HTTP;
      else if (0 == strcmp (proxytype_str, "HTTP_1_0"))
        proxy_type = CURLPROXY_HTTP_1_0;
      else if (0 == strcmp (proxytype_str, "SOCKS4"))
        proxy_type = CURLPROXY_SOCKS4;
      else if (0 == strcmp (proxytype_str, "SOCKS5"))
        proxy_type = CURLPROXY_SOCKS5;
      else if (0 == strcmp (proxytype_str, "SOCKS4A"))
        proxy_type = CURLPROXY_SOCKS4A;
      else if (0 == strcmp (proxytype_str, "SOCKS5_HOSTNAME"))
        proxy_type = CURLPROXY_SOCKS5_HOSTNAME;
      else
      {
        GNUNET_log (
          GNUNET_ERROR_TYPE_ERROR,
          _ (
            "Invalid proxy type: `%s', disabling proxy! Check configuration!\n")
          ,
          proxytype_str);
        GNUNET_free (proxytype_str);
        GNUNET_free (proxy);
        proxy = NULL;
        GNUNET_free (proxy_username);
        proxy_username = NULL;
        GNUNET_free (proxy_password);
        proxy_password = NULL;
 
        return GNUNET_SYSERR;
      }
    }
    GNUNET_free (proxytype_str);
  }
 
  stat_learning = learn;
  *ch = &handler_connect;
  *dh = &handler_disconnect;
  linked_list_head = NULL;
  linked_list_tail = NULL;
  stat_use_bootstrap = GNUNET_YES;
  stat_testing_hostlist = GNUNET_NO;
  stat_testing_allowed = GNUNET_YES;
 
  if (GNUNET_YES == stat_learning)
  {
    *msgh = &handler_advertisement;
    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                _ ("Learning is enabled on this peer\n"));
    load_hostlist_file ();
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Hostlists will be saved to file again in %s\n",
                GNUNET_STRINGS_relative_time_to_string (SAVING_INTERVAL,
                                                        GNUNET_YES));
    ti_saving_task = GNUNET_SCHEDULER_add_delayed (SAVING_INTERVAL,
                                                   &task_hostlist_saving,
                                                   NULL);
  }
  else
  {
    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                _ ("Learning is not enabled on this peer\n"));
    *msgh = NULL;
    if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_filename (cfg,
                                                              "HOSTLIST",
                                                              "HOSTLISTFILE",
                                                              &filename))
    {
      if (GNUNET_YES == GNUNET_DISK_file_test (filename))
      {
        result = remove (filename);
        if (0 == result)
          GNUNET_log (
            GNUNET_ERROR_TYPE_INFO,
            _ (
              "Since learning is not enabled on this peer, hostlist file `%s' was removed\n"),
            filename);
        else
          GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
                                    "remove",
                                    filename);
      }
    }
    GNUNET_free (filename);
  }
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Loading stats value on hostlist download frequency\n");
  sget = GNUNET_STATISTICS_get (stats,
                                "hostlist",
                                gettext_noop (
                                  "# milliseconds between hostlist downloads"),
                                &primary_task,
                                &process_stat,
                                NULL);
  if (NULL == sget)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Statistics request failed, scheduling hostlist download\n");
    ti_check_download = GNUNET_SCHEDULER_add_now (&task_check, NULL);
  }
  else
  {
    ti_check_download = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES,
                                                      &stat_timeout_task,
                                                      NULL);
  }
  return GNUNET_OK;
}

References _, cfg, ch, filename, gettext_noop, GNUNET_assert, GNUNET_break, GNUNET_CONFIGURATION_get_value_filename(), GNUNET_CONFIGURATION_get_value_string(), GNUNET_DISK_file_test(), GNUNET_ERROR_TYPE_DEBUG, GNUNET_ERROR_TYPE_ERROR, GNUNET_ERROR_TYPE_INFO, GNUNET_ERROR_TYPE_WARNING, GNUNET_free, GNUNET_log, GNUNET_log_strerror_file, GNUNET_NO, GNUNET_OK, GNUNET_PEERSTORE_connect(), GNUNET_SCHEDULER_add_delayed(), GNUNET_SCHEDULER_add_now(), GNUNET_STATISTICS_get(), GNUNET_STRINGS_relative_time_to_string(), GNUNET_STRINGS_utf8_toupper(), GNUNET_SYSERR, GNUNET_TIME_UNIT_MINUTES, GNUNET_YES, handler_advertisement(), handler_connect(), handler_disconnect(), linked_list_head, linked_list_tail, load_hostlist_file(), peerstore, primary_task(), process_stat(), proxy, proxy_password, proxy_type, proxy_username, result, SAVING_INTERVAL, sget, st, stat_learning, stat_testing_allowed, stat_testing_hostlist, stat_timeout_task, stat_use_bootstrap, stats, task_check(), task_hostlist_saving(), ti_check_download, and ti_saving_task.

Referenced by run().

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GNUNET_HOSTLIST_client_stop()

void GNUNET_HOSTLIST_client_stop

(

void

)

Stop downloading hostlists from hostlist servers as necessary.

Definition at line 1823 of file gnunet-daemon-hostlist_client.c.

{
  struct StoreHelloEntry *pos;
 
  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Hostlist client shutdown\n");
  while (NULL != (pos = she_head))
  {
    GNUNET_CONTAINER_DLL_remove (she_head, she_tail, pos);
    GNUNET_PEERSTORE_hello_add_cancel (pos->sc);
    GNUNET_free (pos);
  }
  if (NULL != sget)
  {
    GNUNET_STATISTICS_get_cancel (sget);
    sget = NULL;
  }
  stats = NULL;
  if (GNUNET_YES == stat_learning)
    save_hostlist_file (GNUNET_YES);
  if (NULL != ti_saving_task)
  {
    GNUNET_SCHEDULER_cancel (ti_saving_task);
    ti_saving_task = NULL;
  }
  if (NULL != ti_download_dispatcher_task)
  {
    GNUNET_SCHEDULER_cancel (ti_download_dispatcher_task);
    ti_download_dispatcher_task = NULL;
  }
  if (NULL != ti_testing_intervall_task)
  {
    GNUNET_SCHEDULER_cancel (ti_testing_intervall_task);
    ti_testing_intervall_task = NULL;
  }
  if (NULL != ti_download)
  {
    GNUNET_SCHEDULER_cancel (ti_download);
    ti_download = NULL;
    update_hostlist ();
    clean_up ();
  }
  if (NULL != ti_check_download)
  {
    GNUNET_SCHEDULER_cancel (ti_check_download);
    ti_check_download = NULL;
    curl_global_cleanup ();
  }
  GNUNET_free (proxy);
  proxy = NULL;
  GNUNET_free (proxy_username);
  proxy_username = NULL;
  GNUNET_free (proxy_password);
  proxy_password = NULL;
  if (NULL != peerstore)
  {
    GNUNET_PEERSTORE_disconnect (peerstore);
    peerstore = NULL;
  }
  cfg = NULL;
}

References cfg, clean_up(), GNUNET_CONTAINER_DLL_remove, GNUNET_ERROR_TYPE_DEBUG, GNUNET_free, GNUNET_log, GNUNET_PEERSTORE_disconnect(), GNUNET_PEERSTORE_hello_add_cancel(), GNUNET_SCHEDULER_cancel(), GNUNET_STATISTICS_get_cancel(), GNUNET_YES, peerstore, proxy, proxy_password, proxy_username, save_hostlist_file(), StoreHelloEntry::sc, sget, she_head, she_tail, stat_learning, stats, ti_check_download, ti_download, ti_download_dispatcher_task, ti_saving_task, ti_testing_intervall_task, and update_hostlist().

Referenced by cleaning_task().

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