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path: root/src/fs/fs_test_lib.c
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/*
     This file is part of GNUnet.
     (C) 2010, 2011 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 fs/fs_test_lib.c
 * @brief library routines for testing FS publishing and downloading
 *        with multiple peers; this code is limited to flat files
 *        and no keywords (those functions can be tested with
 *        single-peer setups; this is for testing routing).
 * @author Christian Grothoff
 */
#include "platform.h"
#include "fs.h"
#include "fs_test_lib.h"
#include "gnunet_testing_lib.h"

#define CONNECT_ATTEMPTS 4

#define CONTENT_LIFETIME GNUNET_TIME_UNIT_HOURS

/**
 * Handle for a daemon started for testing FS.
 */
struct GNUNET_FS_TestDaemon
{

  /**
   * Global configuration, only stored in first test daemon,
   * otherwise NULL.
   */
  struct GNUNET_CONFIGURATION_Handle *gcfg;

  /**
   * Handle to the file sharing context using this daemon.
   */
  struct GNUNET_FS_Handle *fs;

  /**
   * Handle to the daemon via testing.
   */
  struct GNUNET_TESTING_Daemon *daemon;

  /**
   * Note that 'group' will be the same value for all of the
   * daemons started jointly.
   */
  struct GNUNET_TESTING_PeerGroup *group;

  /**
   * Configuration for accessing this peer.
   */
  struct GNUNET_CONFIGURATION_Handle *cfg;

  /**
   * ID of this peer.
   */
  struct GNUNET_PeerIdentity id;

  /**
   * Function to call when upload is done.
   */
  GNUNET_FS_TEST_UriContinuation publish_cont;
  
  /**
   * Closure for publish_cont.
   */
  void *publish_cont_cls;

  /**
   * Task to abort publishing (timeout).
   */
  GNUNET_SCHEDULER_TaskIdentifier publish_timeout_task;

  /**
   * Seed for file generation.
   */
  uint32_t publish_seed;

  /**
   * Context for current publishing operation.
   */
  struct GNUNET_FS_PublishContext *publish_context;

  /**
   * Result URI.
   */
  struct GNUNET_FS_Uri *publish_uri;

  /**
   * Name of the temporary file used, or NULL for none.
   */ 
  char *publish_tmp_file;

  /**
   * Function to call when download is done.
   */
  GNUNET_SCHEDULER_Task download_cont;

  /**
   * Closure for download_cont.
   */
  void *download_cont_cls;

  /**
   * Seed for download verification.
   */
  uint32_t download_seed;

  /**
   * Task to abort downloading (timeout).
   */
  GNUNET_SCHEDULER_TaskIdentifier download_timeout_task;

  /**
   * Context for current download operation.
   */  
  struct GNUNET_FS_DownloadContext *download_context;

  /**
   * Verbosity level of the current operation.
   */
  int verbose;

		
};

/**
 * Check whether peers successfully shut down.
 */
static void 
shutdown_callback (void *cls,
		   const char *emsg)
{
  struct GNUNET_CONFIGURATION_Handle *gcfg = cls;

  if (emsg != NULL)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                  "Shutdown of peers failed: %s\n",
		  emsg);
    }
  else
    {
#if VERBOSE
      GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                  "All peers successfully shut down!\n");
#endif
    }
  if (gcfg != NULL)
    GNUNET_CONFIGURATION_destroy (gcfg);
}


static void
report_uri (void *cls,
	    const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  struct GNUNET_FS_TestDaemon *daemon = cls;
  GNUNET_FS_TEST_UriContinuation cont;
  struct GNUNET_FS_Uri *uri;

  GNUNET_FS_publish_stop (daemon->publish_context);
  daemon->publish_context = NULL;
  cont = daemon->publish_cont;
  daemon->publish_cont = NULL;
  uri = daemon->publish_uri;
  cont (daemon->publish_cont_cls,
	uri);
  GNUNET_FS_uri_destroy (uri);
}	     


static void
report_success (void *cls,
		const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  struct GNUNET_FS_TestDaemon *daemon = cls;

  GNUNET_FS_download_stop (daemon->download_context, GNUNET_YES);
  daemon->download_context = NULL;
  GNUNET_SCHEDULER_add_continuation (daemon->download_cont,
				     daemon->download_cont_cls,
				     GNUNET_SCHEDULER_REASON_PREREQ_DONE);      
  daemon->download_cont = NULL;
}


static void*
progress_cb (void *cls,
	     const struct GNUNET_FS_ProgressInfo *info)
{
  struct GNUNET_FS_TestDaemon *daemon = cls;

  switch (info->status)
    {
    case GNUNET_FS_STATUS_PUBLISH_COMPLETED:      
      GNUNET_SCHEDULER_cancel (daemon->publish_timeout_task);
      daemon->publish_timeout_task = GNUNET_SCHEDULER_NO_TASK;
      daemon->publish_uri = GNUNET_FS_uri_dup (info->value.publish.specifics.completed.chk_uri);
      GNUNET_SCHEDULER_add_continuation (&report_uri,
					 daemon,
					 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
      break;
    case GNUNET_FS_STATUS_PUBLISH_PROGRESS:
      if (daemon->verbose)
	GNUNET_log (GNUNET_ERROR_TYPE_INFO,
		    "Publishing at %llu/%llu bytes\n",
		    (unsigned long long) info->value.publish.completed,
		    (unsigned long long) info->value.publish.size);
      break;
    case GNUNET_FS_STATUS_DOWNLOAD_PROGRESS:
      if (daemon->verbose)
	GNUNET_log (GNUNET_ERROR_TYPE_INFO,
		    "Download at %llu/%llu bytes\n",
		    (unsigned long long) info->value.download.completed,
		    (unsigned long long) info->value.download.size);
      break;
    case GNUNET_FS_STATUS_DOWNLOAD_COMPLETED:
      GNUNET_SCHEDULER_cancel (daemon->download_timeout_task);
      daemon->download_timeout_task = GNUNET_SCHEDULER_NO_TASK;
      GNUNET_SCHEDULER_add_continuation (&report_success,
					 daemon,
					 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
      break;
    case GNUNET_FS_STATUS_DOWNLOAD_ACTIVE:
    case GNUNET_FS_STATUS_DOWNLOAD_INACTIVE:
      break;
      /* FIXME: monitor data correctness during download progress */
      /* FIXME: do performance reports given sufficient verbosity */
      /* FIXME: advance timeout task to "immediate" on error */
    default:
      break;
    }
  return NULL;
}


struct StartContext
{
  struct GNUNET_TIME_Relative timeout;
  unsigned int total;
  unsigned int have;
  struct GNUNET_FS_TestDaemon **daemons;
  GNUNET_SCHEDULER_Task cont;
  void *cont_cls;
  struct GNUNET_TESTING_PeerGroup *group;
  struct GNUNET_CONFIGURATION_Handle *cfg;
  GNUNET_SCHEDULER_TaskIdentifier timeout_task;
};


static void 
notify_running (void *cls,
		const struct GNUNET_PeerIdentity *id,
		const struct GNUNET_CONFIGURATION_Handle *cfg,
		struct GNUNET_TESTING_Daemon *d,
		const char *emsg)
{
  struct StartContext *sctx = cls;
  unsigned int i;

  if (emsg != NULL)
    {
      GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
		  _("Failed to start daemon: %s\n"),
		  emsg);
      return;
    }
  i = 0;
  while (i < sctx->total)
    {
      if (GNUNET_TESTING_daemon_get (sctx->group,
				     i) == d)
	break;
      i++;
    }
  GNUNET_assert (i < sctx->total);
  GNUNET_assert (sctx->have < sctx->total);
  GNUNET_assert (sctx->daemons[i]->cfg == NULL);
  sctx->daemons[i]->cfg = GNUNET_CONFIGURATION_dup (cfg);
  sctx->daemons[i]->group = sctx->group;
  sctx->daemons[i]->daemon = d;
  sctx->daemons[i]->id = *id;
  sctx->have++;
  if (sctx->have == sctx->total)
    {
      GNUNET_SCHEDULER_add_continuation (sctx->cont,
					 sctx->cont_cls,
					 GNUNET_SCHEDULER_REASON_PREREQ_DONE);
      sctx->daemons[0]->gcfg = sctx->cfg;
      GNUNET_SCHEDULER_cancel (sctx->timeout_task);
      for (i=0;i<sctx->total;i++)
	{
	  sctx->daemons[i]->fs = GNUNET_FS_start (sctx->daemons[i]->cfg,
						  "<tester>",
						  &progress_cb,
						  sctx->daemons[i],
						  GNUNET_FS_FLAGS_NONE,
						  GNUNET_FS_OPTIONS_END);
	}
      GNUNET_free (sctx);
    }
}


static void
start_timeout (void *cls,
	       const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  struct StartContext *sctx = cls;
  unsigned int i;

  GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
	      "Timeout while trying to start daemons\n");
  GNUNET_TESTING_daemons_stop (sctx->group,
			       GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 30), 
			       &shutdown_callback,
			       NULL);
  for (i=0;i<sctx->total;i++)
    {
      if (i < sctx->have)
	GNUNET_CONFIGURATION_destroy (sctx->daemons[i]->cfg);
      GNUNET_free (sctx->daemons[i]);
      sctx->daemons[i] = NULL;
    }
  GNUNET_CONFIGURATION_destroy (sctx->cfg);
  GNUNET_SCHEDULER_add_continuation (sctx->cont,
				     sctx->cont_cls,
				     GNUNET_SCHEDULER_REASON_TIMEOUT);
  GNUNET_free (sctx);
}


/**
 * Start daemons for testing.
 *
 * @param template_cfg_file configuration template to use
 * @param timeout if this operation cannot be completed within the
 *                given period, call the continuation with an error code
 * @param total number of daemons to start
 * @param daemons array of 'total' entries to be initialized
 *                (array must already be allocated, will be filled)
 * @param cont function to call when done
 * @param cont_cls closure for cont
 */
void
GNUNET_FS_TEST_daemons_start (const char *template_cfg_file,
			      struct GNUNET_TIME_Relative timeout,
			      unsigned int total,
			      struct GNUNET_FS_TestDaemon **daemons,
			      GNUNET_SCHEDULER_Task cont,
			      void *cont_cls)
{
  struct StartContext *sctx;
  unsigned int i;

  GNUNET_assert (total > 0);
  sctx = GNUNET_malloc (sizeof (struct StartContext));
  sctx->daemons = daemons;
  sctx->total = total;
  sctx->cont = cont;
  sctx->cont_cls = cont_cls;
  sctx->cfg = GNUNET_CONFIGURATION_create ();
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_load (sctx->cfg,
				 template_cfg_file))
    {
      GNUNET_break (0);
      GNUNET_CONFIGURATION_destroy (sctx->cfg);
      GNUNET_free (sctx);
      GNUNET_SCHEDULER_add_continuation (cont,
					 cont_cls,
					 GNUNET_SCHEDULER_REASON_TIMEOUT);
      return;
    }
  for (i=0;i<total;i++)
    daemons[i] = GNUNET_malloc (sizeof (struct GNUNET_FS_TestDaemon));
  sctx->group = GNUNET_TESTING_daemons_start (sctx->cfg,
					      total,
					      total, /* Outstanding connections */
					      total, /* Outstanding ssh connections */
					      timeout,
					      NULL,
					      NULL,
					      &notify_running,
					      sctx,
					      NULL, NULL,
					      NULL);
  sctx->timeout_task = GNUNET_SCHEDULER_add_delayed (timeout,
						     &start_timeout,
						     sctx);
}


struct ConnectContext
{
  GNUNET_SCHEDULER_Task cont;
  void *cont_cls;
};


/**
 * Prototype of a function that will be called whenever
 * two daemons are connected by the testing library.
 *
 * @param cls closure
 * @param first peer id for first daemon
 * @param second peer id for the second daemon
 * @param distance distance between the connected peers
 * @param first_cfg config for the first daemon
 * @param second_cfg config for the second daemon
 * @param first_daemon handle for the first daemon
 * @param second_daemon handle for the second daemon
 * @param emsg error message (NULL on success)
 */
static void
notify_connection (void *cls,
		   const struct GNUNET_PeerIdentity *first,
		   const struct GNUNET_PeerIdentity *second,
		   uint32_t distance,
		   const struct GNUNET_CONFIGURATION_Handle *first_cfg,
		   const struct GNUNET_CONFIGURATION_Handle *second_cfg,
		   struct GNUNET_TESTING_Daemon *first_daemon,
		   struct GNUNET_TESTING_Daemon *second_daemon,
		   const char *emsg)
{
  struct ConnectContext *cc = cls;
  
  if (emsg != NULL)
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
		"Failed to connect peers: %s\n",
		emsg);
  GNUNET_SCHEDULER_add_continuation (cc->cont,
				     cc->cont_cls,
				     (emsg != NULL) 
				     ? GNUNET_SCHEDULER_REASON_TIMEOUT 
				     : GNUNET_SCHEDULER_REASON_PREREQ_DONE);
  GNUNET_free (cc);
}


/**
 * Connect two daemons for testing.
 *
 * @param daemon1 first daemon to connect
 * @param daemon2 second first daemon to connect
 * @param timeout if this operation cannot be completed within the
 *                given period, call the continuation with an error code
 * @param cont function to call when done
 * @param cont_cls closure for cont
 */
void
GNUNET_FS_TEST_daemons_connect (struct GNUNET_FS_TestDaemon *daemon1,
				struct GNUNET_FS_TestDaemon *daemon2,
				struct GNUNET_TIME_Relative timeout,
				GNUNET_SCHEDULER_Task cont,
				void *cont_cls)
{
  struct ConnectContext *ncc;

  ncc = GNUNET_malloc (sizeof (struct ConnectContext));
  ncc->cont = cont;
  ncc->cont_cls = cont_cls;
  GNUNET_TESTING_daemons_connect (daemon1->daemon,
				  daemon2->daemon,
				  timeout,
				  CONNECT_ATTEMPTS,
				  GNUNET_YES,
				  &notify_connection,
				  ncc);
}


/**
 * Obtain peer configuration used for testing.
 *
 * @param daemons array with the daemons
 * @param off which configuration to get
 * @return peer configuration
 */
const struct GNUNET_CONFIGURATION_Handle *
GNUNET_FS_TEST_get_configuration (struct GNUNET_FS_TestDaemon **daemons,
				  unsigned int off)
{
  return daemons[off]->cfg;  
}

/**
 * Obtain peer group used for testing.
 *
 * @param daemons array with the daemons (must contain at least one)
 * @return peer group
 */
struct GNUNET_TESTING_PeerGroup *
GNUNET_FS_TEST_get_group (struct GNUNET_FS_TestDaemon **daemons)
{
  return daemons[0]->group;  
}


/**
 * Stop daemons used for testing.
 *
 * @param total number of daemons to stop
 * @param daemons array with the daemons (values will be clobbered)
 */
void
GNUNET_FS_TEST_daemons_stop (unsigned int total,
			     struct GNUNET_FS_TestDaemon **daemons)
{
  unsigned int i;
  struct GNUNET_TESTING_PeerGroup *pg;
  struct GNUNET_CONFIGURATION_Handle *gcfg;

  GNUNET_assert (total > 0);
  GNUNET_assert (daemons[0] != NULL);
  pg = daemons[0]->group;
  gcfg = daemons[0]->gcfg;
  for (i=0;i<total;i++)
    {
      if (daemons[i]->fs != NULL)
	GNUNET_FS_stop (daemons[i]->fs);
      if (daemons[i]->cfg != NULL)
	GNUNET_CONFIGURATION_destroy (daemons[i]->cfg);
      if (NULL != daemons[i]->publish_tmp_file)
	{
	  GNUNET_break (GNUNET_OK ==
			GNUNET_DISK_directory_remove (daemons[i]->publish_tmp_file));
	  GNUNET_free (daemons[i]->publish_tmp_file);
	  daemons[i]->publish_tmp_file = NULL;
	}
      GNUNET_free (daemons[i]);
      daemons[i] = NULL;
    }  
  GNUNET_TESTING_daemons_stop (pg, 
			       GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 30), 
			       &shutdown_callback, 
			       gcfg);
}


static void
publish_timeout (void *cls,
		 const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  struct GNUNET_FS_TestDaemon *daemon = cls;
  GNUNET_FS_TEST_UriContinuation cont;

  GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
	      "Timeout while trying to publish data\n");
  cont = daemon->publish_cont;
  daemon->publish_timeout_task = GNUNET_SCHEDULER_NO_TASK;
  daemon->publish_cont = NULL;
  GNUNET_FS_publish_stop (daemon->publish_context);
  daemon->publish_context = NULL;
  cont (daemon->publish_cont_cls,
	NULL);
}


static size_t
file_generator (void *cls, 
		uint64_t offset,
		size_t max, 
		void *buf,
		char **emsg)
{
  struct GNUNET_FS_TestDaemon *daemon = cls;
  uint64_t pos;
  uint8_t *cbuf = buf;
  int mod;

  if (emsg != NULL)
    *emsg = NULL;
  if (buf == NULL)
    return 0;
  for (pos=0;pos<8;pos++)
    cbuf[pos] = (uint8_t) (offset >> pos*8);
  for (pos=8;pos<max;pos++)
    {
      mod = (255 - (offset / 1024 / 32));
      if (mod == 0)
	mod = 1;
      cbuf[pos] = (uint8_t) ((offset * daemon->publish_seed) % mod);  
    }
  return max;
}



/**
 * Publish a file at the given daemon.
 *
 * @param daemon where to publish
 * @param timeout if this operation cannot be completed within the
 *                given period, call the continuation with an error code
 * @param anonymity option for publication
 * @param do_index GNUNET_YES for index, GNUNET_NO for insertion,
 *                GNUNET_SYSERR for simulation
 * @param size size of the file to publish
 * @param seed seed to use for file generation
 * @param verbose how verbose to be in reporting
 * @param cont function to call when done
 * @param cont_cls closure for cont
 */
void
GNUNET_FS_TEST_publish (struct GNUNET_FS_TestDaemon *daemon,
			struct GNUNET_TIME_Relative timeout,
			uint32_t anonymity,
			int do_index,
			uint64_t size,
			uint32_t seed,
			unsigned int verbose,
			GNUNET_FS_TEST_UriContinuation cont,
			void *cont_cls)
{
  struct GNUNET_FS_FileInformation *fi;
  struct GNUNET_DISK_FileHandle *fh;
  char *emsg;
  uint64_t off;
  char buf[DBLOCK_SIZE];
  size_t bsize;
  struct GNUNET_FS_BlockOptions bo;
 
  GNUNET_assert (daemon->publish_cont == NULL);
  daemon->publish_cont = cont;
  daemon->publish_cont_cls = cont_cls;
  daemon->publish_seed = seed;
  daemon->verbose = verbose;
  bo.expiration_time = GNUNET_TIME_relative_to_absolute (CONTENT_LIFETIME);
  bo.anonymity_level = anonymity;
  bo.content_priority = 42;
  bo.replication_level = 1;
  if (GNUNET_YES == do_index)
    {
      GNUNET_assert (daemon->publish_tmp_file == NULL);
      daemon->publish_tmp_file = GNUNET_DISK_mktemp ("fs-test-publish-index");
      GNUNET_assert (daemon->publish_tmp_file != NULL);
      fh = GNUNET_DISK_file_open (daemon->publish_tmp_file,
				  GNUNET_DISK_OPEN_WRITE | GNUNET_DISK_OPEN_CREATE,
				  GNUNET_DISK_PERM_USER_READ | GNUNET_DISK_PERM_USER_WRITE);
      GNUNET_assert (NULL != fh);
      off = 0;      
      while (off < size)
	{
	  bsize = GNUNET_MIN (sizeof (buf),
			      size - off);
	  emsg = NULL;
	  GNUNET_assert (bsize ==
			 file_generator (daemon,
					 off,
					 bsize,
					 buf,
					 &emsg));
	  GNUNET_assert (emsg == NULL);
	  GNUNET_assert (bsize ==
			 GNUNET_DISK_file_write (fh,
						 buf,
						 bsize));
	  off += bsize;
	}
      GNUNET_assert (GNUNET_OK ==
		     GNUNET_DISK_file_close (fh));
      fi = GNUNET_FS_file_information_create_from_file (daemon->fs,
							daemon,						      
							daemon->publish_tmp_file,
							NULL, NULL,
							do_index,
							&bo);
    }
  else
    {
      fi = GNUNET_FS_file_information_create_from_reader (daemon->fs,
							  daemon,						      
							  size,
							  &file_generator,
							  daemon,
							  NULL,
							  NULL,
							  do_index,
							  &bo);
    }
  daemon->publish_context = GNUNET_FS_publish_start (daemon->fs,
						     fi,
						     NULL, NULL, NULL,
						     GNUNET_FS_PUBLISH_OPTION_NONE);
  daemon->publish_timeout_task = GNUNET_SCHEDULER_add_delayed (timeout,
							       &publish_timeout,
							       daemon);
}


static void
download_timeout (void *cls,
		  const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  struct GNUNET_FS_TestDaemon *daemon = cls;

  GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
	      "Timeout while trying to download file\n");
  daemon->download_timeout_task = GNUNET_SCHEDULER_NO_TASK;
  GNUNET_FS_download_stop (daemon->download_context, GNUNET_YES);
  daemon->download_context = NULL;
  GNUNET_SCHEDULER_add_continuation (daemon->download_cont,
				     daemon->download_cont_cls,
				     GNUNET_SCHEDULER_REASON_TIMEOUT);
  daemon->download_cont = NULL;
}


/**
 * Perform test download.
 *
 * @param daemon which peer to download from
 * @param timeout if this operation cannot be completed within the
 *                given period, call the continuation with an error code
 * @param anonymity option for download
 * @param seed used for file validation
 * @param uri URI of file to download (CHK/LOC only)
 * @param verbose how verbose to be in reporting
 * @param cont function to call when done
 * @param cont_cls closure for cont
 */
void
GNUNET_FS_TEST_download (struct GNUNET_FS_TestDaemon *daemon,
			 struct GNUNET_TIME_Relative timeout,
			 uint32_t anonymity,
			 uint32_t seed,
			 const struct GNUNET_FS_Uri *uri,
			 unsigned int verbose,
			 GNUNET_SCHEDULER_Task cont,
			 void *cont_cls)
{
  uint64_t size;
 
  GNUNET_assert (daemon->download_cont == NULL);
  size = GNUNET_FS_uri_chk_get_file_size (uri);
  daemon->verbose = verbose;
  daemon->download_cont = cont;
  daemon->download_cont_cls = cont_cls;
  daemon->download_seed = seed;  
  daemon->download_context = GNUNET_FS_download_start (daemon->fs,
						       uri,
						       NULL, NULL,
						       NULL,
						       0,
						       size,
						       anonymity,
						       GNUNET_FS_DOWNLOAD_OPTION_NONE,
						       NULL,
						       NULL);
  daemon->download_timeout_task = GNUNET_SCHEDULER_add_delayed (timeout,
								&download_timeout,
								daemon);
}

/* end of test_fs_lib.c */