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path: root/src/transport/test_plugin_transport.c
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/*
     This file is part of GNUnet.
     (C) 2009 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 transport/test_plugin_transport.c
 * @brief testcase for transport_api.c
 * @author Sailor Siraj
 * @author Christian Grothoff
 */

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_hello_lib.h"
#include "gnunet_peerinfo_service.h"
#include "gnunet_statistics_service.h"
#include "gnunet_protocols.h"
#include "gnunet_transport_plugin.h"
#include "transport.h"

/**
 * How long until we give up on transmitting the message?
 */
#define WAIT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
#define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30)

#define HOSTKEY_FILE "test_plugin_hostkey.ecc"

/**
 * Our public key.
 */
static struct GNUNET_PeerIdentity my_identity;

/**
 * Our private key.
 */
static struct GNUNET_CRYPTO_EccPrivateKey *my_private_key;

/**
 * Our configuration.
 */
const struct GNUNET_CONFIGURATION_Handle *cfg;

/**
 * Our configuration.
 */
struct GNUNET_STATISTICS_Handle *stats;

/**
 * Our HELLO
 */
struct GNUNET_HELLO_Message *hello;

/**
 * Number of neighbours we'd like to have.
 */
static uint32_t max_connect_per_transport;

/**
 * Environment for this plugin.
 */
struct GNUNET_TRANSPORT_PluginEnvironment env;

/**
 *handle for the api provided by this plugin
 */
struct GNUNET_TRANSPORT_PluginFunctions *api;

/**
 * Helper handler
 */
struct GNUNET_HELPER_Handle *suid_helper;

/**
 * Timeout task
 */
static GNUNET_SCHEDULER_TaskIdentifier timeout_endbadly;

/**
 * Timeout task
 */
static GNUNET_SCHEDULER_TaskIdentifier timeout_wait;

/**
 * Library name
 */
static char *libname;

/**
 * Plugin addresses head
 */
struct AddressWrapper *head;

/**
 * Plugin addresses tail
 */
struct AddressWrapper *tail;

unsigned int addresses_reported;

unsigned int pretty_printers_running;

/**
 * Did the test pass or fail?
 */
static int ok;


struct AddressWrapper
{
  struct AddressWrapper *next;

  struct AddressWrapper *prev;

  void *addr;

  size_t addrlen;

  char *addrstring;
};


static void
end ()
{
  struct AddressWrapper *w;
  int c = 0;
  ok = 0;

  if (GNUNET_SCHEDULER_NO_TASK != timeout_endbadly)
  {
      GNUNET_SCHEDULER_cancel (timeout_endbadly);
      timeout_endbadly = GNUNET_SCHEDULER_NO_TASK;
  }
  if (NULL != api)
      GNUNET_PLUGIN_unload (libname, api);

  while (NULL != head)
  {
      w = head;
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
		  "Plugin did not remove address `%s'\n", w->addrstring);
      GNUNET_CONTAINER_DLL_remove (head, tail, w);
      c ++;
      GNUNET_free (w->addr);
      GNUNET_free (w->addrstring);
      GNUNET_free (w);
  }
  if (c > 0)
  {
    GNUNET_break (0);
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
		"Plugin did not remove %u addresses \n", c);
    ok = 1;
  }


  GNUNET_free (libname);
  libname = NULL;
  GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
  stats = NULL;

  if (NULL != suid_helper)
  {
    GNUNET_HELPER_stop (suid_helper, GNUNET_NO);
    suid_helper = NULL;
  }
}


static void
end_badly (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  struct AddressWrapper *w;
  int c = 0;

  timeout_endbadly = GNUNET_SCHEDULER_NO_TASK;
  if (GNUNET_SCHEDULER_NO_TASK != timeout_wait)
  {
      GNUNET_SCHEDULER_cancel (timeout_wait);
      timeout_wait = GNUNET_SCHEDULER_NO_TASK;
  }

  if (pretty_printers_running > 0)
  {
      timeout_endbadly = GNUNET_SCHEDULER_add_delayed(GNUNET_TIME_UNIT_SECONDS, &end_badly, &ok);
      GNUNET_log (GNUNET_ERROR_TYPE_INFO,
		  "Have pending calls to pretty_printer ... deferring shutdown\n");
      return;
  }

  if (NULL != cls)
  {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
		  "Test took too long to execute, timeout .... \n");
  }

  if (NULL != libname)
  {
    if (NULL != api)
      GNUNET_PLUGIN_unload (libname, api);
    GNUNET_free (libname);
    libname = NULL;
  }

  while (NULL != head)
  {
      w = head;
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
		  "Plugin did not remove address `%s'\n", w->addrstring);
      GNUNET_CONTAINER_DLL_remove (head, tail, w);
      c ++;
      GNUNET_free (w->addr);
      GNUNET_free (w->addrstring);
      GNUNET_free (w);
  }
  if (c > 0)
  {
    GNUNET_break (0);
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
		"Plugin did not remove %u addresses\n", c);
  }

  if (NULL != stats)
  {
    GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
    stats = NULL;
  }

  if (NULL != suid_helper)
  {
    GNUNET_HELPER_stop (suid_helper, GNUNET_NO);
    suid_helper = NULL;
  }

  ok = 1;
}


static void
wait_end (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  timeout_wait = GNUNET_SCHEDULER_NO_TASK;
  if (0 == addresses_reported)
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
		"Plugin did not report any addresses, could not check address conversion functions\n");
  end ();
}


static void
end_badly_now ()
{
  if (GNUNET_SCHEDULER_NO_TASK != timeout_wait)
  {
      GNUNET_SCHEDULER_cancel (timeout_wait);
      timeout_wait = GNUNET_SCHEDULER_NO_TASK;
  }
  if (GNUNET_SCHEDULER_NO_TASK != timeout_endbadly)
  {
      GNUNET_SCHEDULER_cancel (timeout_endbadly);
      timeout_endbadly = GNUNET_SCHEDULER_NO_TASK;
  }
  timeout_endbadly = GNUNET_SCHEDULER_add_now (&end_badly, NULL);
}


static struct GNUNET_TIME_Relative
env_receive (void *cls,
            const struct GNUNET_PeerIdentity *peer,
            const struct GNUNET_MessageHeader *message,
            struct Session * session,
            const char *sender_address,
            uint16_t sender_address_len)
{
  /* do nothing */
  return GNUNET_TIME_relative_get_zero_();
}


static int got_reply;


/**
 * Take the given address and append it to the set of results sent back to
 * the client.
 *
 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
 * @param buf text to transmit
 */
static void
address_pretty_printer_cb (void *cls, const char *buf)
{
  if (NULL != buf)
  {
    got_reply = GNUNET_YES;
    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                "Pretty address : `%s'\n", buf);
    pretty_printers_running --;
  }
  else
  {
      if (GNUNET_NO == got_reply)
      {
          pretty_printers_running --;
          GNUNET_break (0);
          end_badly_now ();
      }
  }
}


static void
env_notify_address (void *cls,
                    int add_remove,
                    const void *addr,
                    size_t addrlen,
                    const char *plugin)
{
  struct AddressWrapper *w;
  struct AddressWrapper *wtmp;
  void *s2a;
  size_t s2a_len;

  if (GNUNET_YES == add_remove)
  {
      addresses_reported ++;
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "Adding address of length %u\n", addrlen);

      for (wtmp = head; NULL != wtmp; wtmp = wtmp->next)
      {
      	if ((addrlen == wtmp->addrlen) && (0 == memcmp (addr, wtmp->addr, addrlen)))
      	{
          	GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                      "Duplicate address notification .... \n");
      			return;
      	}
      }

      w = GNUNET_new (struct AddressWrapper);
      w->addr = GNUNET_malloc (addrlen);
      w->addrlen = addrlen;
      memcpy (w->addr, addr, addrlen);
      GNUNET_CONTAINER_DLL_insert(head, tail, w);
      got_reply = GNUNET_NO;
      GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                  "Testing: address_to_string \n");
      w->addrstring = strdup (api->address_to_string (api, w->addr, w->addrlen));
      if (NULL == w->addrstring)
      {
          GNUNET_break (0);
          GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                      "Plugin cannot convert address to string!\n");
          end_badly_now();
          return;
      }
      else
      {
      	GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                  "Plugin added address `%s'\n", w->addrstring);
        GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                    "Testing address_to_string: OK\n");
      }

      GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                  "Testing: string_to_address \n");
      s2a = NULL;
      s2a_len = 0;
      if ((GNUNET_OK != api->string_to_address (api, w->addrstring, strlen (w->addrstring)+1, &s2a, &s2a_len)) || (NULL == s2a))
      {
          GNUNET_break (0);
          GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                      "Plugin cannot convert string to address!\n");
          end_badly_now();
          return;
      }

      /*
      GNUNET_log (GNUNET_ERROR_TYPE_INFO,
						"Plugin creates `%s' %u\n",api->address_to_string (api, s2a, s2a_len), s2a_len);

      int c1;
      for (c1 = 0; c1 < s2a_len; c1++ )
      	fprintf (stderr, "%u == %u\n", ((char *) s2a)[c1], ((char *) w->addr)[c1]);
      	*/
      if (s2a_len != w->addrlen)
      {
          GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                      "Plugin creates different address length when converting address->string->address: %u != %u\n", w->addrlen, s2a_len);
      }
      else if (0 != memcmp (s2a, w->addr, s2a_len))
      {
            GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                        "Plugin creates different address length when converting back and forth %i!\n", memcmp (s2a, w->addr, s2a_len));
      }
      else
      {
        GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                    "Testing string_to_address: OK\n");
      }
      GNUNET_free (s2a);

      pretty_printers_running ++;
      api->address_pretty_printer (api->cls, plugin, addr, addrlen,
                                    GNUNET_YES, GNUNET_TIME_UNIT_MINUTES,
                                    &address_pretty_printer_cb,
                                    w);

      if (GNUNET_OK != api->check_address (api->cls, w->addr, w->addrlen))
      {
          GNUNET_break (0);
          GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                      "Plugin refuses added address!\n");
          end_badly_now();
          return;
      }
      if (GNUNET_SCHEDULER_NO_TASK != timeout_wait)
      {
          GNUNET_SCHEDULER_cancel (timeout_wait);
          timeout_wait = GNUNET_SCHEDULER_NO_TASK;
      }

      timeout_wait = GNUNET_SCHEDULER_add_delayed (WAIT, &wait_end, NULL);

  }
  else if (GNUNET_NO == add_remove)
  {
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "Removing address of length %u\n", addrlen);

      w = head;
      while (NULL != w)
      {
          if ((addrlen == w->addrlen) && (0 == memcmp (w->addr, addr, addrlen)))
          {
            break;
          }
          w = w->next;
      }

      if (w == NULL)
      {
          GNUNET_break (0);
          GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                      "Plugin removes address never added!\n");
          end_badly_now();
          return;
      }

      GNUNET_CONTAINER_DLL_remove (head, tail, w);
      GNUNET_free (w->addr);
      GNUNET_free (w->addrstring);
      GNUNET_free (w);
  }
  else
  {
      GNUNET_break (0);
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                  "Invalid operation: %u\n", add_remove);
      end_badly_now ();
      return;
  }
}


static struct GNUNET_ATS_Information
env_get_address_type (void *cls,
                     const struct sockaddr *addr,
                     size_t addrlen)
{
  struct GNUNET_ATS_Information ats;
  ats.type = htonl (GNUNET_ATS_NETWORK_TYPE);
  ats.value = htonl (GNUNET_ATS_NET_LOOPBACK);
  return ats;
}


static const struct GNUNET_MessageHeader *
env_get_our_hello ()
{
  return (const struct GNUNET_MessageHeader *) hello;
}


static void
env_session_end (void *cls,
		 const struct GNUNET_PeerIdentity *peer,
		 struct Session * session)
{
}


static void
env_update_metrics (void *cls,
	  const struct GNUNET_PeerIdentity *peer,
	  const void *address,
	  uint16_t address_len,
	  struct Session *session,
	  const struct GNUNET_ATS_Information *ats,
	  uint32_t ats_count)
{
}


static void
setup_plugin_environment ()
{
  env.cfg = cfg;
  env.cls = &env;
  env.my_identity = &my_identity;
  env.max_connections = max_connect_per_transport;
  env.stats = stats;
  env.receive = &env_receive;
  env.notify_address = &env_notify_address;
  env.get_address_type = &env_get_address_type;
  env.update_address_metrics = &env_update_metrics;
  env.get_our_hello = &env_get_our_hello;
  env.session_end = &env_session_end;
}


static int
handle_helper_message (void *cls, void *client,
                       const struct GNUNET_MessageHeader *hdr)
{
  return GNUNET_OK;
}


/**
 * Runs the test.
 *
 * @param cls closure
 * @param c configuration to use
 */
static void
run (void *cls, char *const *args, const char *cfgfile,
     const struct GNUNET_CONFIGURATION_Handle *c)
{
  char *const *argv = cls;
  unsigned long long tneigh;
  char *keyfile;
  char *plugin;
  char *sep;

  timeout_endbadly = GNUNET_SCHEDULER_add_delayed (TIMEOUT, end_badly, &ok);

  cfg = c;
  /* parse configuration */
  if ( (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (c,
							    "TRANSPORT",
							    "NEIGHBOUR_LIMIT",
							    &tneigh)) ||
       (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (c,
							      "PEER", "PRIVATE_KEY",
							      &keyfile)))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Transport service is lacking key configuration settings.  Exiting.\n");
    return;
  }

  if (NULL == (stats = GNUNET_STATISTICS_create ("transport", cfg)))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
		"Could not create statistics.  Exiting.\n");
    end_badly_now ();
    return;
  }

  if (GNUNET_OK != GNUNET_DISK_file_test (HOSTKEY_FILE))
  {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                  "Hostkey `%s' missing.  Exiting.\n",
                  HOSTKEY_FILE);
      GNUNET_free (keyfile);
      end_badly_now ();
      return;
  }

  if (GNUNET_OK != GNUNET_DISK_directory_create_for_file (keyfile))
  {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                  "Could not create a directory for hostkey `%s'.  Exiting.\n",
                  keyfile);
      GNUNET_free (keyfile);
      end_badly_now ();
      return;
  }

  if (GNUNET_OK !=  GNUNET_DISK_file_copy (HOSTKEY_FILE, keyfile))
  {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                  "Could not copy hostkey `%s' to destination `%s'.  Exiting.\n",
                  HOSTKEY_FILE, keyfile);
      GNUNET_free (keyfile);
      end_badly_now ();
      return;
  }


  max_connect_per_transport = (uint32_t) tneigh;
  my_private_key = GNUNET_CRYPTO_ecc_key_create_from_file (keyfile);
  GNUNET_free (keyfile);
  if (NULL == my_private_key)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Could not access hostkey.  Exiting.\n");
    end_badly_now ();
    return;
  }
  GNUNET_CRYPTO_ecc_key_get_public_for_signature (my_private_key, &my_identity.public_key);

  hello = GNUNET_HELLO_create (&my_identity.public_key, NULL, NULL, GNUNET_NO);

  /* load plugins... */
  setup_plugin_environment ();

  GNUNET_assert (strlen (argv[0]) > strlen ("test_plugin_"));
  plugin = strstr(argv[0],"test_plugin_");
  sep = strrchr(argv[0],'.');
  if (NULL == plugin)
  {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Not a valid test name\n");
      end_badly_now ();
      return;
  }
  plugin += strlen ("test_plugin_");
  if (NULL != sep)
      sep[0] = '\0';

  /* Hack for WLAN: start a second helper */
  if (0 == strcmp (plugin, "wlan"))
  {
    char * helper_argv[3];
    helper_argv[0] = (char *) "gnunet-helper-transport-wlan-dummy";
    helper_argv[1] = (char *) "2";
    helper_argv[2] = NULL;
    suid_helper = GNUNET_HELPER_start (GNUNET_NO,
				       "gnunet-helper-transport-wlan-dummy",
                                       helper_argv,
                                       &handle_helper_message,
                                       NULL,
                                       NULL);
  }

  /* Loading plugin */
  GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Loading transport plugin %s\n", plugin);
  GNUNET_asprintf (&libname, "libgnunet_plugin_transport_%s", plugin);
  api = GNUNET_PLUGIN_load (libname, &env);
  if (api == NULL)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                "Failed to load transport plugin for %s\n", plugin);
    end_badly_now ();
    return;
  }

  timeout_wait = GNUNET_SCHEDULER_add_delayed (WAIT, &wait_end, NULL);

  /* Check if all functions are implemented */
  if (NULL == api->address_pretty_printer)
  {
      GNUNET_break (0);
      end_badly_now ();
      return;
  }
  if (NULL == api->address_to_string)
  {
      GNUNET_break (0);
      end_badly_now ();
      return;
  }
  GNUNET_assert (NULL != api->check_address);
  if (NULL == api->check_address)
  {
      GNUNET_break (0);
      end_badly_now ();
      return;
  }
  GNUNET_assert (NULL != api->disconnect);
  if (NULL == api->disconnect)
  {
      GNUNET_break (0);
      end_badly_now ();
      return;
  }
  GNUNET_assert (NULL != api->get_session);
  if (NULL == api->get_session)
  {
      GNUNET_break (0);
      end_badly_now ();
      return;
  }
  if (NULL == api->address_pretty_printer)
  {
      GNUNET_break (0);
      end_badly_now ();
      return;
  }
  if (NULL == api->string_to_address)
  {
      GNUNET_break (0);
      end_badly_now ();
      return;
  }

}


/**
 * The main function for the test
 *
 * @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)
{
  static struct GNUNET_GETOPT_CommandLineOption options[] = {
    GNUNET_GETOPT_OPTION_END
  };
  int ret;

  GNUNET_DISK_directory_remove ("/tmp/test-gnunetd-plugin-transport");

  char *const argv_prog[] = {
    "test_plugin_transport",
    "-c",
    "test_plugin_transport_data.conf",
    NULL
  };
  GNUNET_log_setup ("test-plugin-transport",
                    "WARNING",
                    NULL);
  ok = 1;                       /* set to fail */
  ret = (GNUNET_OK == GNUNET_PROGRAM_run (3,
					  argv_prog,
					  "test-plugin-transport",
					  "testcase",
					  options,
					  &run,
					  (void *) argv)) ? ok : 1;
  GNUNET_DISK_directory_remove ("/tmp/test-gnunetd-plugin-transport");
  return ret;
}

/* end of test_plugin_transport.c */