src/testing/testing.c

   1 /*
   2       This file is part of GNUnet
   3       (C) 2008, 2009 Christian Grothoff (and other contributing authors)
   4
   5       GNUnet is free software; you can redistribute it and/or modify
   6       it under the terms of the GNU General Public License as published
   7       by the Free Software Foundation; either version 2, or (at your
   8       option) any later version.
   9
  10       GNUnet is distributed in the hope that it will be useful, but
  11       WITHOUT ANY WARRANTY; without even the implied warranty of
  12       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13       General Public License for more details.
  14
  15       You should have received a copy of the GNU General Public License
  16       along with GNUnet; see the file COPYING.  If not, write to the
  17       Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18       Boston, MA 02111-1307, USA.
  19  */
  20
  21 /**
  22  * @file testing/testing.c
  23  * @brief convenience API for writing testcases for GNUnet
  24  *        Many testcases need to start and stop gnunetd,
  25  *        and this library is supposed to make that easier
  26  *        for TESTCASES.  Normal programs should always
  27  *        use functions from gnunet_{util,arm}_lib.h.  This API is
  28  *        ONLY for writing testcases!
  29  * @author Christian Grothoff
  30  *
  31  */
  32 #include "platform.h"
  33 #include "gnunet_arm_service.h"
  34 #include "gnunet_core_service.h"
  35 #include "gnunet_constants.h"
  36 #include "gnunet_testing_lib.h"
  37 #include "gnunet_transport_service.h"
  38 #include "gnunet_hello_lib.h"
  39
  40 #define DEBUG_TESTING GNUNET_NO
  41 #define DEBUG_TESTING_RECONNECT GNUNET_YES
  42
  43 /**
  44  * How long do we wait after starting gnunet-service-arm
  45  * for the core service to be alive?
  46  */
  47 #define ARM_START_WAIT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 120)
  48
  49 /**
  50  * How many times are we willing to try to wait for "scp" or
  51  * "gnunet-service-arm" to complete (waitpid) before giving up?
  52  */
  53 #define MAX_EXEC_WAIT_RUNS 250
  54
  55 static struct GNUNET_CORE_MessageHandler no_handlers[] = { {NULL, 0, 0} };
  56
  57 /**
  58  * Receive the HELLO from one peer, give it to the other
  59  * and ask them to connect.
  60  *
  61  * @param cls "struct ConnectContext"
  62  * @param message HELLO message of peer
  63  */
  64 static void
  65 process_hello (void *cls, const struct GNUNET_MessageHeader *message)
  66 {
  67   struct GNUNET_TESTING_Daemon *daemon = cls;
  68   if (daemon == NULL)
  69     return;
  70
  71   if (daemon->server != NULL)
  72     {
  73       GNUNET_CORE_disconnect(daemon->server);
  74       daemon->server = NULL;
  75     }
  76
  77   GNUNET_assert (message != NULL);
  78   if (daemon->th != NULL)
  79     {
  80       GNUNET_TRANSPORT_get_hello_cancel(daemon->th, &process_hello, daemon);
  81     }
  82 #if DEBUG_TESTING
  83   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
  84               "Received `%s' from transport service of `%4s'\n",
  85               "HELLO", GNUNET_i2s (&daemon->id));
  86 #endif
  87
  88   GNUNET_free_non_null(daemon->hello);
  89   daemon->hello = GNUNET_malloc(ntohs(message->size));
  90   memcpy(daemon->hello, message, ntohs(message->size));
  91
  92   if (daemon->th != NULL)
  93     {
  94       GNUNET_TRANSPORT_disconnect(daemon->th);
  95       daemon->th = NULL;
  96     }
  97
  98 }
  99
 100 /**
 101  * Function called after GNUNET_CORE_connect has succeeded
 102  * (or failed for good).  Note that the private key of the
 103  * peer is intentionally not exposed here; if you need it,
 104  * your process should try to read the private key file
 105  * directly (which should work if you are authorized...).
 106  *
 107  * @param cls closure
 108  * @param server handle to the server, NULL if we failed
 109  * @param my_identity ID of this peer, NULL if we failed
 110  * @param publicKey public key of this peer, NULL if we failed
 111  */
 112 static void
 113 testing_init (void *cls,
 114               struct GNUNET_CORE_Handle *server,
 115               const struct GNUNET_PeerIdentity *my_identity,
 116               const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
 117 {
 118   struct GNUNET_TESTING_Daemon *d = cls;
 119   GNUNET_TESTING_NotifyDaemonRunning cb;
 120
 121   GNUNET_assert (d->phase == SP_START_CORE);
 122   d->phase = SP_START_DONE;
 123   cb = d->cb;
 124   d->cb = NULL;
 125   if (server == NULL)
 126     {
 127       d->server = NULL;
 128       if (GNUNET_YES == d->dead)
 129         GNUNET_TESTING_daemon_stop (d, GNUNET_TIME_absolute_get_remaining(d->max_timeout), d->dead_cb, d->dead_cb_cls, GNUNET_YES);
 130       else if (NULL != cb)
 131         cb (d->cb_cls, NULL, d->cfg, d,
 132             _("Failed to connect to core service\n"));
 133       return;
 134     }
 135 #if DEBUG_TESTING
 136   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 137               "Successfully started peer `%4s'.\n", GNUNET_i2s (my_identity));
 138 #endif
 139   d->id = *my_identity;
 140   d->shortname = strdup (GNUNET_i2s (my_identity));
 141   d->server = server;
 142   d->running = GNUNET_YES;
 143   if (GNUNET_YES == d->dead)
 144     GNUNET_TESTING_daemon_stop (d, GNUNET_TIME_absolute_get_remaining(d->max_timeout), d->dead_cb, d->dead_cb_cls, GNUNET_YES);
 145   else if (NULL != cb)
 146     cb (d->cb_cls, my_identity, d->cfg, d, NULL);
 147 #if DEBUG_TESTING
 148   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 149               "Successfully started peer `%4s'.\n", GNUNET_i2s (my_identity));
 150 #endif
 151
 152
 153   d->th = GNUNET_TRANSPORT_connect (d->sched,
 154                                     d->cfg, d, NULL, NULL, NULL);
 155   if (d->th == NULL)
 156     {
 157       if (GNUNET_YES == d->dead)
 158         GNUNET_TESTING_daemon_stop (d, GNUNET_TIME_absolute_get_remaining(d->max_timeout), d->dead_cb, d->dead_cb_cls, GNUNET_YES);
 159       else if (NULL != d->cb)
 160         d->cb (d->cb_cls, &d->id, d->cfg, d,
 161             _("Failed to connect to transport service!\n"));
 162       return;
 163     }
 164
 165   GNUNET_TRANSPORT_get_hello (d->th, &process_hello, d);
 166 }
 167
 168
 169 /**
 170  * Finite-state machine for starting GNUnet.
 171  *
 172  * @param cls our "struct GNUNET_TESTING_Daemon"
 173  * @param tc unused
 174  */
 175 static void
 176 start_fsm (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 177 {
 178   struct GNUNET_TESTING_Daemon *d = cls;
 179   GNUNET_TESTING_NotifyDaemonRunning cb;
 180   enum GNUNET_OS_ProcessStatusType type;
 181   unsigned long code;
 182   char *dst;
 183   int bytes_read;
 184   static char hostkeybuf[105];
 185   static const char temphostkey[104];
 186
 187 #if DEBUG_TESTING
 188   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 189               "Peer FSM is in phase %u.\n", d->phase);
 190 #endif
 191
 192   d->task = GNUNET_SCHEDULER_NO_TASK;
 193   switch (d->phase)
 194     {
 195     case SP_COPYING:
 196       /* confirm copying complete */
 197       if (GNUNET_OK != GNUNET_OS_process_status (d->pid, &type, &code))
 198         {
 199           if (GNUNET_TIME_absolute_get_remaining(d->max_timeout).value == 0)
 200             {
 201               cb = d->cb;
 202               d->cb = NULL;
 203               if (NULL != cb)
 204                 cb (d->cb_cls,
 205                     NULL,
 206                     d->cfg, d, _("`scp' does not seem to terminate (timeout copying config).\n"));
 207               return;
 208             }
 209           /* wait some more */
 210           d->task
 211             = GNUNET_SCHEDULER_add_delayed (d->sched,
 212                                             GNUNET_CONSTANTS_EXEC_WAIT,
 213                                             &start_fsm, d);
 214           return;
 215         }
 216       if ((type != GNUNET_OS_PROCESS_EXITED) || (code != 0))
 217         {
 218           cb = d->cb;
 219           d->cb = NULL;
 220           if (NULL != cb)
 221             cb (d->cb_cls,
 222                 NULL, d->cfg, d, _("`scp' did not complete cleanly.\n"));
 223           return;
 224         }
 225 #if DEBUG_TESTING
 226       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 227                   "Successfully copied configuration file.\n");
 228 #endif
 229       d->phase = SP_COPIED;
 230       /* fall-through */
 231     case SP_COPIED:
 232       /* Start create hostkey process */
 233       d->pipe_stdout = GNUNET_DISK_pipe(GNUNET_NO);
 234       if (d->pipe_stdout == NULL)
 235         {
 236           cb = d->cb;
 237           d->cb = NULL;
 238           if (NULL != cb)
 239             cb (d->cb_cls,
 240                 NULL,
 241                 d->cfg,
 242                 d,
 243                 (NULL == d->hostname)
 244                 ? _("Failed to create pipe for `gnunet-peerinfo' process.\n")
 245                 : _("Failed to create pipe for `ssh' process.\n"));
 246           return;
 247         }
 248       if (NULL == d->hostname)
 249         {
 250 #if DEBUG_TESTING
 251           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 252                       "Starting `%s', with command `%s %s %s %s'.\n",
 253                       "gnunet-peerinfo", "gnunet-peerinfo", "-c", d->cfgfile,
 254                       "-sq");
 255 #endif
 256           d->pid = GNUNET_OS_start_process (NULL, d->pipe_stdout, "gnunet-peerinfo",
 257                                             "gnunet-peerinfo",
 258                                             "-c", d->cfgfile,
 259                                             "-sq", NULL);
 260           GNUNET_DISK_pipe_close_end(d->pipe_stdout, GNUNET_DISK_PIPE_END_WRITE);
 261         }
 262       else
 263         {
 264           if (d->username != NULL)
 265             GNUNET_asprintf (&dst, "%s@%s", d->username, d->hostname);
 266           else
 267             dst = GNUNET_strdup (d->hostname);
 268
 269 #if DEBUG_TESTING
 270           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 271                       "Starting `%s', with command `%s %s %s %s %s %s'.\n",
 272                       "gnunet-peerinfo", "ssh", dst, "gnunet-peerinfo", "-c", d->cfgfile,
 273                       "-sq");
 274 #endif
 275           d->pid = GNUNET_OS_start_process (NULL, d->pipe_stdout, "ssh",
 276                                             "ssh",
 277                                             dst,
 278                                             "gnunet-peerinfo",
 279                                             "-c", d->cfgfile, "-sq", NULL);
 280           GNUNET_DISK_pipe_close_end(d->pipe_stdout, GNUNET_DISK_PIPE_END_WRITE);
 281           GNUNET_free (dst);
 282         }
 283       if (-1 == d->pid)
 284         {
 285           GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 286                       _("Could not start `%s' process to create hostkey.\n"),
 287                       (NULL == d->hostname) ? "gnunet-peerinfo" : "ssh");
 288           cb = d->cb;
 289           d->cb = NULL;
 290           if (NULL != cb)
 291             cb (d->cb_cls,
 292                 NULL,
 293                 d->cfg,
 294                 d,
 295                 (NULL == d->hostname)
 296                 ? _("Failed to start `gnunet-peerinfo' process.\n")
 297                 : _("Failed to start `ssh' process.\n"));
 298           GNUNET_DISK_pipe_close(d->pipe_stdout);
 299           return;
 300         }
 301 #if DEBUG_TESTING
 302       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 303                   "Started `%s', waiting for hostkey.\n",
 304                   "gnunet-peerinfo");
 305 #endif
 306       d->phase = SP_HOSTKEY_CREATE;
 307       d->task
 308         = GNUNET_SCHEDULER_add_delayed (d->sched,
 309                                         GNUNET_CONSTANTS_EXEC_WAIT,
 310                                         &start_fsm, d);
 311       break;
 312     case SP_HOSTKEY_CREATE:
 313
 314       bytes_read = GNUNET_DISK_file_read(GNUNET_DISK_pipe_handle(d->pipe_stdout, GNUNET_DISK_PIPE_END_READ), &hostkeybuf, sizeof(hostkeybuf));
 315       if (bytes_read == 104) /* Success, we have read in the hostkey */
 316         {
 317           if (hostkeybuf[103] == '\n')
 318             hostkeybuf[103] = '\0';
 319           else
 320             GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Malformed output from gnunet-peerinfo!\n");
 321           memcpy(&temphostkey, &hostkeybuf, bytes_read);
 322
 323           if (GNUNET_OK != GNUNET_CRYPTO_hash_from_string (&temphostkey[0],
 324                                                            &d->id.hashPubKey))
 325             {
 326               GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Failed to convert string to peer identity!\n");
 327             }
 328           else
 329             {
 330               GNUNET_DISK_pipe_close(d->pipe_stdout);
 331               d->pipe_stdout = NULL;
 332             }
 333         }
 334
 335       if (GNUNET_OK != GNUNET_OS_process_status (d->pid, &type, &code))
 336         {
 337           if (GNUNET_TIME_absolute_get_remaining(d->max_timeout).value == 0)
 338             {
 339               cb = d->cb;
 340               d->cb = NULL;
 341               if (NULL != cb)
 342                 cb (d->cb_cls,
 343                     NULL,
 344                     d->cfg,
 345                     d,
 346                     (NULL == d->hostname)
 347                     ? _("`gnunet-peerinfo' does not seem to terminate.\n")
 348                     : _("`ssh' does not seem to terminate.\n"));
 349
 350               GNUNET_DISK_pipe_close(d->pipe_stdout);
 351               return;
 352             }
 353           /* wait some more */
 354           d->task
 355             = GNUNET_SCHEDULER_add_delayed (d->sched,
 356                                             GNUNET_CONSTANTS_EXEC_WAIT,
 357                                             &start_fsm, d);
 358           return;
 359         }
 360 #if DEBUG_TESTING
 361       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 362                   "Successfully got hostkey!\n");
 363 #endif
 364       if (d->pipe_stdout != NULL)
 365         {
 366           cb = d->cb;
 367           d->cb = NULL;
 368           if (NULL != cb)
 369             cb (d->cb_cls,
 370                 NULL,
 371                 d->cfg,
 372                 d,
 373                 _("`Failed to get hostkey!\n"));
 374           GNUNET_DISK_pipe_close(d->pipe_stdout);
 375           return;
 376         }
 377
 378       if (d->hostkey_callback != NULL)
 379         {
 380           d->hostkey_callback(d->hostkey_cls, &d->id, d, NULL);
 381           d->phase = SP_HOSTKEY_CREATED;
 382         }
 383       else
 384         {
 385           d->phase = SP_TOPOLOGY_SETUP;
 386         }
 387
 388       /* Fall through */
 389     case SP_HOSTKEY_CREATED:
 390       /* wait for topology finished */
 391       if ((GNUNET_YES == d->dead) || (GNUNET_TIME_absolute_get_remaining(d->max_timeout).value == 0))
 392         {
 393           cb = d->cb;
 394           d->cb = NULL;
 395           if (NULL != cb)
 396             cb (d->cb_cls,
 397                 NULL,
 398                 d->cfg,
 399                 d,
 400                 _("`Failed while waiting for topology setup!\n"));
 401           return;
 402         }
 403
 404       d->task
 405         = GNUNET_SCHEDULER_add_delayed (d->sched,
 406                                         GNUNET_CONSTANTS_EXEC_WAIT,
 407                                         &start_fsm, d);
 408       break;
 409     case SP_TOPOLOGY_SETUP:
 410       /* start GNUnet on remote host */
 411       if (NULL == d->hostname)
 412         {
 413 #if DEBUG_TESTING
 414           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 415                       "Starting `%s', with command `%s %s %s %s %s %s'.\n",
 416                       "gnunet-arm", "gnunet-arm", "-c", d->cfgfile,
 417                       "-L", "DEBUG",
 418                       "-s");
 419 #endif
 420           d->pid = GNUNET_OS_start_process (NULL, NULL, "gnunet-arm",
 421                                             "gnunet-arm",
 422                                             "-c", d->cfgfile,
 423 #if DEBUG_TESTING
 424                                             "-L", "DEBUG",
 425 #endif
 426                                             "-s", "-q", NULL);
 427         }
 428       else
 429         {
 430           if (d->username != NULL)
 431             GNUNET_asprintf (&dst, "%s@%s", d->username, d->hostname);
 432           else
 433             dst = GNUNET_strdup (d->hostname);
 434
 435 #if DEBUG_TESTING
 436           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 437                       "Starting `%s', with command `%s %s %s %s %s %s %s %s'.\n",
 438                       "gnunet-arm", "ssh", dst, "gnunet-arm", "-c", d->cfgfile,
 439                       "-L", "DEBUG", "-s", "-q");
 440 #endif
 441           d->pid = GNUNET_OS_start_process (NULL, NULL, "ssh",
 442                                             "ssh",
 443                                             dst,
 444                                             "gnunet-arm",
 445 #if DEBUG_TESTING
 446                                             "-L", "DEBUG",
 447 #endif
 448                                             "-c", d->cfgfile, "-s", "-q", NULL);
 449           GNUNET_free (dst);
 450         }
 451       if (-1 == d->pid)
 452         {
 453           GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 454                       _("Could not start `%s' process to start GNUnet.\n"),
 455                       (NULL == d->hostname) ? "gnunet-arm" : "ssh");
 456           cb = d->cb;
 457           d->cb = NULL;
 458           if (NULL != cb)
 459             cb (d->cb_cls,
 460                 NULL,
 461                 d->cfg,
 462                 d,
 463                 (NULL == d->hostname)
 464                 ? _("Failed to start `gnunet-arm' process.\n")
 465                 : _("Failed to start `ssh' process.\n"));
 466           return;
 467         }
 468 #if DEBUG_TESTING
 469       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 470                   "Started `%s', waiting for `%s' to be up.\n",
 471                   "gnunet-arm", "gnunet-service-core");
 472 #endif
 473       d->phase = SP_START_ARMING;
 474       d->task
 475         = GNUNET_SCHEDULER_add_delayed (d->sched,
 476                                         GNUNET_CONSTANTS_EXEC_WAIT,
 477                                         &start_fsm, d);
 478       break;
 479     case SP_START_ARMING:
 480       if (GNUNET_OK != GNUNET_OS_process_status (d->pid, &type, &code))
 481         {
 482           if (GNUNET_TIME_absolute_get_remaining(d->max_timeout).value == 0)
 483             {
 484               cb = d->cb;
 485               d->cb = NULL;
 486               if (NULL != cb)
 487                 cb (d->cb_cls,
 488                     NULL,
 489                     d->cfg,
 490                     d,
 491                     (NULL == d->hostname)
 492                     ? _("`gnunet-arm' does not seem to terminate.\n")
 493                     : _("`ssh' does not seem to terminate.\n"));
 494               return;
 495             }
 496           /* wait some more */
 497           d->task
 498             = GNUNET_SCHEDULER_add_delayed (d->sched,
 499                                             GNUNET_CONSTANTS_EXEC_WAIT,
 500                                             &start_fsm, d);
 501           return;
 502         }
 503 #if DEBUG_TESTING
 504       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 505                   "Successfully started `%s'.\n", "gnunet-arm");
 506 #endif
 507       d->phase = SP_START_CORE;
 508       d->server = GNUNET_CORE_connect (d->sched,
 509                                        d->cfg,
 510                                        ARM_START_WAIT,
 511                                        d,
 512                                        &testing_init,
 513                                        NULL, NULL,
 514                                        NULL, GNUNET_NO,
 515                                        NULL, GNUNET_NO, no_handlers);
 516       break;
 517     case SP_START_CORE:
 518       GNUNET_break (0);
 519       break;
 520     case SP_START_DONE:
 521       GNUNET_break (0);
 522       break;
 523     case SP_SHUTDOWN_START:
 524       /* confirm copying complete */
 525       if (GNUNET_OK != GNUNET_OS_process_status (d->pid, &type, &code))
 526         {
 527           if (GNUNET_TIME_absolute_get_remaining(d->max_timeout).value == 0)
 528             {
 529               d->dead_cb (d->dead_cb_cls,
 530                           _("either `gnunet-arm' or `ssh' does not seem to terminate.\n"));
 531               if (d->th != NULL)
 532                 {
 533                   GNUNET_TRANSPORT_get_hello_cancel(d->th, &process_hello, d);
 534                   GNUNET_TRANSPORT_disconnect(d->th);
 535                   d->th = NULL;
 536                 }
 537               GNUNET_CONFIGURATION_destroy (d->cfg);
 538               GNUNET_free (d->cfgfile);
 539               GNUNET_free_non_null(d->hello);
 540               GNUNET_free_non_null (d->hostname);
 541               GNUNET_free_non_null (d->username);
 542               GNUNET_free_non_null (d->shortname);
 543               GNUNET_free (d);
 544               return;
 545             }
 546           /* wait some more */
 547           d->task
 548             = GNUNET_SCHEDULER_add_delayed (d->sched,
 549                                             GNUNET_CONSTANTS_EXEC_WAIT,
 550                                             &start_fsm, d);
 551           return;
 552         }
 553       if ((type != GNUNET_OS_PROCESS_EXITED) || (code != 0))
 554         {
 555           if (NULL != d->dead_cb)
 556             d->dead_cb (d->dead_cb_cls,
 557                         _("shutdown (either `gnunet-arm' or `ssh') did not complete cleanly.\n"));
 558           if (d->th != NULL)
 559             {
 560               GNUNET_TRANSPORT_get_hello_cancel(d->th, &process_hello, d);
 561               GNUNET_TRANSPORT_disconnect(d->th);
 562               d->th = NULL;
 563             }
 564           GNUNET_CONFIGURATION_destroy (d->cfg);
 565           GNUNET_free (d->cfgfile);
 566           GNUNET_free_non_null(d->hello);
 567           GNUNET_free_non_null (d->hostname);
 568           GNUNET_free_non_null (d->username);
 569           GNUNET_free_non_null (d->shortname);
 570           GNUNET_free (d);
 571           return;
 572         }
 573 #if DEBUG_TESTING
 574       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Peer shutdown complete.\n");
 575 #endif
 576       if (d->th != NULL)
 577         {
 578           GNUNET_TRANSPORT_get_hello_cancel(d->th, &process_hello, d);
 579           GNUNET_TRANSPORT_disconnect(d->th);
 580           d->th = NULL;
 581         }
 582       /* state clean up and notifications */
 583       GNUNET_CONFIGURATION_destroy (d->cfg);
 584       GNUNET_free (d->cfgfile);
 585       GNUNET_free_non_null(d->hello);
 586       GNUNET_free_non_null (d->hostname);
 587       GNUNET_free_non_null (d->username);
 588       GNUNET_free_non_null (d->shortname);
 589       if (NULL != d->dead_cb)
 590         d->dead_cb (d->dead_cb_cls, NULL);
 591       GNUNET_free (d);
 592       break;
 593     case SP_CONFIG_UPDATE:
 594       /* confirm copying complete */
 595       if (GNUNET_OK != GNUNET_OS_process_status (d->pid, &type, &code))
 596         {
 597           if (GNUNET_TIME_absolute_get_remaining(d->max_timeout).value == 0) /* FIXME: config update should take timeout parameter! */
 598             {
 599               cb = d->cb;
 600               d->cb = NULL;
 601               if (NULL != cb)
 602                 cb (d->cb_cls,
 603                     NULL,
 604                     d->cfg, d, _("`scp' does not seem to terminate.\n"));
 605               return;
 606             }
 607           /* wait some more */
 608           d->task
 609             = GNUNET_SCHEDULER_add_delayed (d->sched,
 610                                             GNUNET_CONSTANTS_EXEC_WAIT,
 611                                             &start_fsm, d);
 612           return;
 613         }
 614       if ((type != GNUNET_OS_PROCESS_EXITED) || (code != 0))
 615         {
 616           if (NULL != d->update_cb)
 617             d->update_cb (d->update_cb_cls,
 618                           _("`scp' did not complete cleanly.\n"));
 619           return;
 620         }
 621 #if DEBUG_TESTING
 622       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 623                   "Successfully copied configuration file.\n");
 624 #endif
 625       if (NULL != d->update_cb)
 626         d->update_cb (d->update_cb_cls, NULL);
 627       d->phase = SP_START_DONE;
 628       break;
 629     }
 630 }
 631
 632 /**
 633  * Continues GNUnet daemon startup when user wanted to be notified
 634  * once a hostkey was generated (for creating friends files, blacklists,
 635  * etc.).
 636  *
 637  * @param daemon the daemon to finish starting
 638  */
 639 void
 640 GNUNET_TESTING_daemon_continue_startup(struct GNUNET_TESTING_Daemon *daemon)
 641 {
 642   GNUNET_assert(daemon->phase == SP_HOSTKEY_CREATED);
 643   daemon->phase = SP_TOPOLOGY_SETUP;
 644 }
 645
 646 /**
 647  * Starts a GNUnet daemon.  GNUnet must be installed on the target
 648  * system and available in the PATH.  The machine must furthermore be
 649  * reachable via "ssh" (unless the hostname is "NULL") without the
 650  * need to enter a password.
 651  *
 652  * @param sched scheduler to use
 653  * @param cfg configuration to use
 654  * @param timeout how long to wait starting up peers
 655  * @param hostname name of the machine where to run GNUnet
 656  *        (use NULL for localhost).
 657  * @param hostkey_callback function to call once the hostkey has been
 658  *        generated for this peer, but it hasn't yet been started
 659  *        (NULL to start immediately, otherwise waits on GNUNET_TESTING_daemon_continue_start)
 660  * @param hostkey_cls closure for hostkey callback
 661  * @param cb function to call with the result
 662  * @param cb_cls closure for cb
 663  * @return handle to the daemon (actual start will be completed asynchronously)
 664  */
 665 struct GNUNET_TESTING_Daemon *
 666 GNUNET_TESTING_daemon_start (struct GNUNET_SCHEDULER_Handle *sched,
 667                              const struct GNUNET_CONFIGURATION_Handle *cfg,
 668                              struct GNUNET_TIME_Relative timeout,
 669                              const char *hostname,
 670                              GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback,
 671                              void *hostkey_cls,
 672                              GNUNET_TESTING_NotifyDaemonRunning cb,
 673                              void *cb_cls)
 674 {
 675   struct GNUNET_TESTING_Daemon *ret;
 676   char *arg;
 677   char *username;
 678
 679   ret = GNUNET_malloc (sizeof (struct GNUNET_TESTING_Daemon));
 680   ret->sched = sched;
 681   ret->hostname = (hostname == NULL) ? NULL : GNUNET_strdup (hostname);
 682   ret->cfgfile = GNUNET_DISK_mktemp ("gnunet-testing-config");
 683 #if DEBUG_TESTING
 684   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 685               "Setting up peer with configuration file `%s'.\n",
 686               ret->cfgfile);
 687 #endif
 688   if (NULL == ret->cfgfile)
 689     {
 690       GNUNET_free_non_null (ret->hostname);
 691       GNUNET_free (ret);
 692       return NULL;
 693     }
 694   ret->hostkey_callback = hostkey_callback;
 695   ret->hostkey_cls = hostkey_cls;
 696   ret->cb = cb;
 697   ret->cb_cls = cb_cls;
 698   ret->max_timeout = GNUNET_TIME_relative_to_absolute(timeout);
 699   ret->cfg = GNUNET_CONFIGURATION_dup (cfg);
 700   GNUNET_CONFIGURATION_set_value_string (ret->cfg,
 701                                          "PATHS",
 702                                          "DEFAULTCONFIG", ret->cfgfile);
 703   /* 1) write configuration to temporary file */
 704   if (GNUNET_OK != GNUNET_CONFIGURATION_write (ret->cfg, ret->cfgfile))
 705     {
 706       if (0 != UNLINK (ret->cfgfile))
 707         GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
 708                                   "unlink", ret->cfgfile);
 709       GNUNET_CONFIGURATION_destroy (ret->cfg);
 710       GNUNET_free_non_null (ret->hostname);
 711       GNUNET_free (ret->cfgfile);
 712       GNUNET_free (ret);
 713       return NULL;
 714     }
 715   if (GNUNET_OK !=
 716       GNUNET_CONFIGURATION_get_value_string (cfg,
 717                                              "TESTING",
 718                                              "USERNAME", &username))
 719     {
 720       if (NULL != getenv ("USER"))
 721         username = GNUNET_strdup (getenv ("USER"));
 722       else
 723         username = NULL;
 724     }
 725   ret->username = username;
 726
 727   /* 2) copy file to remote host */
 728   if (NULL != hostname)
 729     {
 730 #if DEBUG_TESTING
 731       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 732                   "Copying configuration file to host `%s'.\n", hostname);
 733 #endif
 734       ret->phase = SP_COPYING;
 735       if (NULL != username)
 736         GNUNET_asprintf (&arg, "%s@%s:%s", username, hostname, ret->cfgfile);
 737       else
 738         GNUNET_asprintf (&arg, "%s:%s", hostname, ret->cfgfile);
 739       ret->pid = GNUNET_OS_start_process (NULL, NULL, "scp",
 740                                           "scp", ret->cfgfile, arg, NULL);
 741       GNUNET_free (arg);
 742       if (-1 == ret->pid)
 743         {
 744           GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 745                       _
 746                       ("Could not start `%s' process to copy configuration file.\n"),
 747                       "scp");
 748           if (0 != UNLINK (ret->cfgfile))
 749             GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
 750                                       "unlink", ret->cfgfile);
 751           GNUNET_CONFIGURATION_destroy (ret->cfg);
 752           GNUNET_free_non_null (ret->hostname);
 753           GNUNET_free_non_null (ret->username);
 754           GNUNET_free (ret->cfgfile);
 755           GNUNET_free (ret);
 756           return NULL;
 757         }
 758       ret->task
 759         = GNUNET_SCHEDULER_add_delayed (sched,
 760                                         GNUNET_CONSTANTS_EXEC_WAIT,
 761                                         &start_fsm, ret);
 762       return ret;
 763     }
 764 #if DEBUG_TESTING
 765   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 766               "No need to copy configuration file since we are running locally.\n");
 767 #endif
 768   ret->phase = SP_COPIED;
 769   GNUNET_SCHEDULER_add_continuation (sched,
 770                                      &start_fsm,
 771                                      ret,
 772                                      GNUNET_SCHEDULER_REASON_PREREQ_DONE);
 773   return ret;
 774 }
 775
 776
 777 /**
 778  * Restart (stop and start) a GNUnet daemon.
 779  *
 780  * @param d the daemon that should be restarted
 781  * @param cb function called once the daemon is (re)started
 782  * @param cb_cls closure for cb
 783  */
 784 void
 785 GNUNET_TESTING_daemon_restart (struct GNUNET_TESTING_Daemon *d,
 786                                GNUNET_TESTING_NotifyDaemonRunning cb, void *cb_cls)
 787 {
 788   char *arg;
 789   char *del_arg;
 790
 791   del_arg = NULL;
 792   if (NULL != d->cb)
 793     {
 794       d->dead = GNUNET_YES;
 795       return;
 796     }
 797
 798   d->cb = cb;
 799   d->cb_cls = cb_cls;
 800
 801   if (d->phase == SP_CONFIG_UPDATE)
 802     {
 803       GNUNET_SCHEDULER_cancel (d->sched, d->task);
 804       d->phase = SP_START_DONE;
 805     }
 806   if (d->server != NULL)
 807     {
 808       GNUNET_CORE_disconnect (d->server);
 809       d->server = NULL;
 810     }
 811
 812   if (d->th != NULL)
 813     {
 814       GNUNET_TRANSPORT_get_hello_cancel(d->th, &process_hello, d);
 815       GNUNET_TRANSPORT_disconnect(d->th);
 816       d->th = NULL;
 817     }
 818   /* state clean up and notifications */
 819   GNUNET_free_non_null(d->hello);
 820
 821 #if DEBUG_TESTING
 822     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 823                 _("Terminating peer `%4s'\n"), GNUNET_i2s (&d->id));
 824 #endif
 825
 826    d->phase = SP_START_ARMING;
 827
 828     /* Check if this is a local or remote process */
 829   if (NULL != d->hostname)
 830     {
 831 #if DEBUG_TESTING
 832       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 833                   "Stopping gnunet-arm with config `%s' on host `%s'.\n", d->cfgfile, d->hostname);
 834 #endif
 835
 836       if (d->username != NULL)
 837         GNUNET_asprintf (&arg, "%s@%s", d->username, d->hostname);
 838       else
 839         arg = GNUNET_strdup (d->hostname);
 840
 841       d->pid = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh",
 842                                         arg, "gnunet-arm",
 843 #if DEBUG_TESTING
 844                                         "-L", "DEBUG",
 845 #endif
 846                                         "-c", d->cfgfile, "-e", "-r", NULL);
 847       /* Use -r to restart arm and all services */
 848
 849       GNUNET_free (arg);
 850     }
 851   else
 852     {
 853 #if DEBUG_TESTING
 854       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 855                   "Stopping gnunet-arm with config `%s' locally.\n", d->cfgfile);
 856 #endif
 857       d->pid = GNUNET_OS_start_process (NULL, NULL, "gnunet-arm",
 858                                         "gnunet-arm",
 859 #if DEBUG_TESTING
 860                                         "-L", "DEBUG",
 861 #endif
 862                                         "-c", d->cfgfile, "-e", "-r", NULL);
 863     }
 864
 865     GNUNET_free_non_null(del_arg);
 866     d->task
 867       = GNUNET_SCHEDULER_add_delayed (d->sched,
 868                                       GNUNET_CONSTANTS_EXEC_WAIT,
 869                                       &start_fsm, d);
 870
 871 }
 872
 873
 874 /**
 875  * Stops a GNUnet daemon.
 876  *
 877  * @param d the daemon that should be stopped
 878  * @param timeout how long to wait for process for shutdown to complete
 879  * @param cb function called once the daemon was stopped
 880  * @param cb_cls closure for cb
 881  * @param delete_files GNUNET_YES to remove files, GNUNET_NO
 882  *        to leave them (i.e. for restarting at a later time,
 883  *        or logfile inspection once finished)
 884  */
 885 void
 886 GNUNET_TESTING_daemon_stop (struct GNUNET_TESTING_Daemon *d,
 887                             struct GNUNET_TIME_Relative timeout,
 888                             GNUNET_TESTING_NotifyCompletion cb, void *cb_cls,
 889                             int delete_files)
 890 {
 891   char *arg;
 892   char *del_arg;
 893   d->dead_cb = cb;
 894   d->dead_cb_cls = cb_cls;
 895
 896   if (NULL != d->cb)
 897     {
 898 #if DEBUG_TESTING
 899       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 900                  _("Setting d->dead on peer `%4s'\n"), GNUNET_i2s (&d->id));
 901 #endif
 902       d->dead = GNUNET_YES;
 903       return;
 904     }
 905
 906   del_arg = NULL;
 907   if (delete_files == GNUNET_YES)
 908     {
 909       GNUNET_asprintf(&del_arg, "-d");
 910     }
 911
 912   if (d->phase == SP_CONFIG_UPDATE)
 913     {
 914       GNUNET_SCHEDULER_cancel (d->sched, d->task);
 915       d->phase = SP_START_DONE;
 916     }
 917   if (d->server != NULL)
 918     {
 919       GNUNET_CORE_disconnect (d->server);
 920       d->server = NULL;
 921     }
 922   /* shutdown ARM process (will terminate others) */
 923 #if DEBUG_TESTING
 924   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 925               _("Terminating peer `%4s'\n"), GNUNET_i2s (&d->id));
 926 #endif
 927
 928   d->phase = SP_SHUTDOWN_START;
 929   /* Check if this is a local or remote process */
 930   if (NULL != d->hostname)
 931     {
 932 #if DEBUG_TESTING
 933       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 934                   "Stopping gnunet-arm with config `%s' on host `%s'.\n", d->cfgfile, d->hostname);
 935 #endif
 936
 937       if (d->username != NULL)
 938         GNUNET_asprintf (&arg, "%s@%s", d->username, d->hostname);
 939       else
 940         arg = GNUNET_strdup (d->hostname);
 941
 942       d->pid = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh",
 943                                         arg, "gnunet-arm",
 944 #if DEBUG_TESTING
 945                                         "-L", "DEBUG",
 946 #endif
 947                                         "-c", d->cfgfile, "-e", "-q", del_arg, NULL);
 948       /* Use -e to end arm, and -d to remove temp files */
 949
 950       GNUNET_free (arg);
 951     }
 952   else
 953     {
 954 #if DEBUG_TESTING
 955       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 956                   "Stopping gnunet-arm with config `%s' locally.\n", d->cfgfile);
 957 #endif
 958       d->pid = GNUNET_OS_start_process (NULL, NULL, "gnunet-arm",
 959                                         "gnunet-arm",
 960 #if DEBUG_TESTING
 961                                         "-L", "DEBUG",
 962 #endif
 963                                         "-c", d->cfgfile, "-e", "-q", del_arg, NULL);
 964     }
 965
 966   GNUNET_free_non_null(del_arg);
 967   d->max_timeout = GNUNET_TIME_relative_to_absolute(timeout);
 968   d->task
 969     = GNUNET_SCHEDULER_add_delayed (d->sched,
 970                                     GNUNET_CONSTANTS_EXEC_WAIT,
 971                                     &start_fsm, d);
 972 }
 973
 974
 975 /**
 976  * Changes the configuration of a GNUnet daemon.
 977  *
 978  * @param d the daemon that should be modified
 979  * @param cfg the new configuration for the daemon
 980  * @param cb function called once the configuration was changed
 981  * @param cb_cls closure for cb
 982  */
 983 void
 984 GNUNET_TESTING_daemon_reconfigure (struct GNUNET_TESTING_Daemon *d,
 985                                    struct GNUNET_CONFIGURATION_Handle *cfg,
 986                                    GNUNET_TESTING_NotifyCompletion cb,
 987                                    void *cb_cls)
 988 {
 989   char *arg;
 990
 991   if (d->phase != SP_START_DONE)
 992     {
 993       if (NULL != cb)
 994         cb (cb_cls,
 995             _
 996             ("Peer not yet running, can not change configuration at this point."));
 997       return;
 998     }
 999
1000   /* 1) write configuration to temporary file */
1001   if (GNUNET_OK != GNUNET_CONFIGURATION_write (cfg, d->cfgfile))
1002     {
1003       if (NULL != cb)
1004         cb (cb_cls, _("Failed to write new configuration to disk."));
1005       return;
1006     }
1007
1008   /* 2) copy file to remote host (if necessary) */
1009   if (NULL == d->hostname)
1010     {
1011       /* signal success */
1012       if (NULL != cb)
1013         cb (cb_cls, NULL);
1014       return;
1015     }
1016 #if DEBUG_TESTING
1017   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1018               "Copying updated configuration file to remote host `%s'.\n",
1019               d->hostname);
1020 #endif
1021   d->phase = SP_CONFIG_UPDATE;
1022   if (NULL != d->username)
1023     GNUNET_asprintf (&arg, "%s@%s:%s", d->username, d->hostname, d->cfgfile);
1024   else
1025     GNUNET_asprintf (&arg, "%s:%s", d->hostname, d->cfgfile);
1026   d->pid = GNUNET_OS_start_process (NULL, NULL, "scp", "scp", d->cfgfile, arg, NULL);
1027   GNUNET_free (arg);
1028   if (-1 == d->pid)
1029     {
1030       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1031                   _
1032                   ("Could not start `%s' process to copy configuration file.\n"),
1033                   "scp");
1034       if (NULL != cb)
1035         cb (cb_cls, _("Failed to copy new configuration to remote machine."));
1036       d->phase = SP_START_DONE;
1037       return;
1038     }
1039   d->update_cb = cb;
1040   d->update_cb_cls = cb_cls;
1041   d->task
1042     = GNUNET_SCHEDULER_add_delayed (d->sched,
1043                                     GNUNET_CONSTANTS_EXEC_WAIT,
1044                                     &start_fsm, d);
1045 }
1046
1047
1048 /**
1049  * Data kept for each pair of peers that we try
1050  * to connect.
1051  */
1052 struct ConnectContext
1053 {
1054   /**
1055    * Testing handle to the first daemon.
1056    */
1057   struct GNUNET_TESTING_Daemon *d1;
1058
1059   /**
1060    * Handle to core of first daemon (to check connect)
1061    */
1062   struct GNUNET_CORE_Handle * d1core;
1063
1064   /**
1065    * Testing handle to the second daemon.
1066    */
1067   struct GNUNET_TESTING_Daemon *d2;
1068
1069   /**
1070    * Transport handle to the second daemon.
1071    */
1072   struct GNUNET_TRANSPORT_Handle *d2th;
1073
1074   /**
1075    * Function to call once we are done (or have timed out).
1076    */
1077   GNUNET_TESTING_NotifyConnection cb;
1078
1079   /**
1080    * Closure for "nb".
1081    */
1082   void *cb_cls;
1083
1084   /**
1085    * When should this operation be complete (or we must trigger
1086    * a timeout).
1087    */
1088   struct GNUNET_TIME_Absolute timeout;
1089
1090   /**
1091    * The relative timeout from whence this connect attempt was
1092    * started.  Allows for reconnect attempts.
1093    */
1094   struct GNUNET_TIME_Relative relative_timeout;
1095
1096   /**
1097    * Maximum number of connect attempts, will retry connection
1098    * this number of times on failures.
1099    */
1100   unsigned int max_connect_attempts;
1101
1102   /**
1103    * Hello timeout task
1104    */
1105   GNUNET_SCHEDULER_TaskIdentifier hello_send_task;
1106
1107   /**
1108    * Connect timeout task
1109    */
1110   GNUNET_SCHEDULER_TaskIdentifier timeout_task;
1111
1112   /**
1113    * When should this operation be complete (or we must trigger
1114    * a timeout).
1115    */
1116   struct GNUNET_TIME_Relative timeout_hello;
1117
1118
1119   /**
1120    * Was the connection attempt successful?
1121    */
1122   int connected;
1123 };
1124
1125
1126 /** Forward declaration **/
1127 static void
1128 reattempt_daemons_connect(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1129
1130
1131 /**
1132  * Notify callback about success or failure of the attempt
1133  * to connect the two peers
1134  *
1135  * @param cls our "struct ConnectContext" (freed)
1136  * @param tc reason tells us if we succeeded or failed
1137  */
1138 static void
1139 notify_connect_result (void *cls,
1140                        const struct GNUNET_SCHEDULER_TaskContext *tc)
1141 {
1142   struct ConnectContext *ctx = cls;
1143   struct GNUNET_TIME_Relative remaining;
1144
1145   if (ctx->hello_send_task != GNUNET_SCHEDULER_NO_TASK)
1146     {
1147       GNUNET_SCHEDULER_cancel(ctx->d1->sched, ctx->hello_send_task);
1148       ctx->hello_send_task = GNUNET_SCHEDULER_NO_TASK;
1149     }
1150
1151   if ((ctx->timeout_task != GNUNET_SCHEDULER_NO_TASK) && (tc->reason != GNUNET_SCHEDULER_REASON_TIMEOUT))
1152     {
1153       GNUNET_SCHEDULER_cancel(ctx->d1->sched, ctx->timeout_task);
1154       ctx->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1155     }
1156
1157   if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
1158     {
1159       if (ctx->d2th != NULL)
1160         GNUNET_TRANSPORT_disconnect (ctx->d2th);
1161       ctx->d2th = NULL;
1162       if (ctx->d1core != NULL)
1163         GNUNET_CORE_disconnect (ctx->d1core);
1164
1165       ctx->d1core = NULL;
1166       GNUNET_free (ctx);
1167       return;
1168     }
1169
1170   remaining = GNUNET_TIME_absolute_get_remaining(ctx->timeout);
1171
1172   if (ctx->connected == GNUNET_YES)
1173     {
1174       if (ctx->cb != NULL)
1175         {
1176           ctx->cb (ctx->cb_cls, &ctx->d1->id, &ctx->d2->id, ctx->d1->cfg,
1177                    ctx->d2->cfg, ctx->d1, ctx->d2, NULL);
1178         }
1179     }
1180   else if (remaining.value > 0)
1181     {
1182       if (ctx->d1core != NULL)
1183         {
1184           GNUNET_CORE_disconnect(ctx->d1core);
1185           ctx->d1core = NULL;
1186         }
1187
1188       if (ctx->d2th != NULL)
1189         {
1190           GNUNET_TRANSPORT_disconnect(ctx->d2th);
1191           ctx->d2th = NULL;
1192         }
1193       GNUNET_SCHEDULER_add_now(ctx->d1->sched, &reattempt_daemons_connect, ctx);
1194       return;
1195     }
1196   else
1197     {
1198       if (ctx->cb != NULL)
1199         {
1200           ctx->cb (ctx->cb_cls, &ctx->d1->id, &ctx->d2->id, ctx->d1->cfg,
1201                    ctx->d2->cfg, ctx->d1, ctx->d2,
1202                    _("Peers failed to connect"));
1203         }
1204     }
1205
1206   GNUNET_TRANSPORT_disconnect (ctx->d2th);
1207   ctx->d2th = NULL;
1208   GNUNET_CORE_disconnect (ctx->d1core);
1209   ctx->d1core = NULL;
1210   GNUNET_free (ctx);
1211 }
1212
1213
1214 /**
1215  * Success, connection is up.  Signal client our success.
1216  *
1217  * @param cls our "struct ConnectContext"
1218  * @param peer identity of the peer that has connected
1219  * @param latency the round trip latency of the connection to this peer
1220  * @param distance distance the transport level distance to this peer
1221  *
1222  */
1223 static void
1224 connect_notify (void *cls, const struct GNUNET_PeerIdentity * peer, struct GNUNET_TIME_Relative latency,
1225                 uint32_t distance)
1226 {
1227   struct ConnectContext *ctx = cls;
1228
1229   if (memcmp(&ctx->d2->id, peer, sizeof(struct GNUNET_PeerIdentity)) == 0)
1230     {
1231       ctx->connected = GNUNET_YES;
1232       GNUNET_SCHEDULER_cancel(ctx->d1->sched, ctx->timeout_task);
1233       ctx->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1234       GNUNET_SCHEDULER_add_now (ctx->d1->sched,
1235                                 &notify_connect_result,
1236                                 ctx);
1237     }
1238
1239 }
1240
1241 static void
1242 send_hello(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1243 {
1244   struct ConnectContext *ctx = cls;
1245
1246   if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
1247     return;
1248
1249   if (ctx->d1->hello != NULL)
1250     {
1251       GNUNET_TRANSPORT_offer_hello (ctx->d2th, GNUNET_HELLO_get_header(ctx->d1->hello));
1252       ctx->timeout_hello = GNUNET_TIME_relative_add(ctx->timeout_hello,
1253                                                     GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS,
1254                                                                                   500));
1255     }
1256   ctx->hello_send_task = GNUNET_SCHEDULER_add_delayed(ctx->d1->sched,
1257                                                       ctx->timeout_hello,
1258                                                       &send_hello, ctx);
1259 }
1260
1261 /**
1262  * Establish a connection between two GNUnet daemons.
1263  *
1264  * @param d1 handle for the first daemon
1265  * @param d2 handle for the second daemon
1266  * @param timeout how long is the connection attempt
1267  *        allowed to take?
1268  * @param max_connect_attempts how many times should we try to reconnect
1269  *        (within timeout)
1270  * @param cb function to call at the end
1271  * @param cb_cls closure for cb
1272  */
1273 void
1274 GNUNET_TESTING_daemons_connect (struct GNUNET_TESTING_Daemon *d1,
1275                                 struct GNUNET_TESTING_Daemon *d2,
1276                                 struct GNUNET_TIME_Relative timeout,
1277                                 unsigned int max_connect_attempts,
1278                                 GNUNET_TESTING_NotifyConnection cb,
1279                                 void *cb_cls)
1280 {
1281   struct ConnectContext *ctx;
1282
1283   if ((d1->running == GNUNET_NO) || (d2->running == GNUNET_NO))
1284     {
1285       if (NULL != cb)
1286         cb (cb_cls, &d1->id, &d2->id, d1->cfg, d2->cfg, d1, d2,
1287             _("Peers are not fully running yet, can not connect!\n"));
1288       return;
1289     }
1290   ctx = GNUNET_malloc (sizeof (struct ConnectContext));
1291   ctx->d1 = d1;
1292   ctx->d2 = d2;
1293   ctx->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1294   ctx->timeout_hello = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500);
1295   ctx->relative_timeout = timeout;
1296   ctx->cb = cb;
1297   ctx->cb_cls = cb_cls;
1298   ctx->max_connect_attempts = max_connect_attempts;
1299   ctx->connected = GNUNET_NO;
1300 #if DEBUG_TESTING
1301   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1302               "Asked to connect peer %s to peer %s\n",
1303               d1->shortname, d2->shortname);
1304 #endif
1305
1306   ctx->d1core = GNUNET_CORE_connect (d1->sched,
1307                                      d1->cfg,
1308                                      timeout,
1309                                      ctx,
1310                                      NULL,
1311                                      &connect_notify, NULL,
1312                                      NULL, GNUNET_NO,
1313                                      NULL, GNUNET_NO, no_handlers);
1314   if (ctx->d1core == NULL)
1315     {
1316       GNUNET_free (ctx);
1317       if (NULL != cb)
1318         cb (cb_cls, &d1->id, &d2->id, d1->cfg, d2->cfg, d1, d2,
1319             _("Failed to connect to core service of first peer!\n"));
1320       return;
1321     }
1322
1323 #if DEBUG_TESTING > 2
1324   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1325               "Asked to connect peer %s to peer %s\n",
1326               d1->shortname, d2->shortname);
1327   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1328               "Connecting to transport service of peer %s\n", d2->shortname);
1329
1330 #endif
1331
1332   ctx->d2th = GNUNET_TRANSPORT_connect (d2->sched,
1333                                         d2->cfg, d2, NULL, NULL, NULL);
1334   if (ctx->d2th == NULL)
1335     {
1336       GNUNET_CORE_disconnect(ctx->d1core);
1337       GNUNET_free (ctx);
1338       if (NULL != cb)
1339         cb (cb_cls, &d1->id, &d2->id, d1->cfg, d2->cfg, d1, d2,
1340             _("Failed to connect to transport service!\n"));
1341       return;
1342     }
1343
1344   ctx->timeout_task = GNUNET_SCHEDULER_add_delayed (d1->sched,
1345                                                     GNUNET_TIME_relative_divide(ctx->relative_timeout, max_connect_attempts), /* Allow up to 8 reconnect attempts */
1346                                                     &notify_connect_result, ctx);
1347
1348   ctx->hello_send_task = GNUNET_SCHEDULER_add_now(ctx->d1->sched, &send_hello, ctx);
1349 }
1350
1351 static void
1352 reattempt_daemons_connect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1353 {
1354
1355   struct ConnectContext *ctx = cls;
1356   if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
1357     {
1358       return;
1359     }
1360 #if DEBUG_TESTING_RECONNECT
1361   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "re-attempting connect of peer %s to peer %s\n",
1362               ctx->d1->shortname, ctx->d2->shortname);
1363 #endif
1364
1365   GNUNET_assert(ctx->d1core == NULL);
1366
1367   ctx->d1core = GNUNET_CORE_connect (ctx->d1->sched,
1368                                      ctx->d1->cfg,
1369                                      GNUNET_TIME_absolute_get_remaining(ctx->timeout),
1370                                      ctx,
1371                                      NULL,
1372                                      &connect_notify, NULL,
1373                                      NULL, GNUNET_NO,
1374                                      NULL, GNUNET_NO, no_handlers);
1375   if (ctx->d1core == NULL)
1376     {
1377       if (NULL != ctx->cb)
1378         ctx->cb (ctx->cb_cls, &ctx->d1->id, &ctx->d2->id, ctx->d1->cfg, ctx->d2->cfg, ctx->d1, ctx->d2,
1379                  _("Failed to connect to core service of first peer!\n"));
1380       GNUNET_free (ctx);
1381       return;
1382     }
1383
1384   ctx->d2th = GNUNET_TRANSPORT_connect (ctx->d2->sched,
1385                                         ctx->d2->cfg, ctx->d2, NULL, NULL, NULL);
1386   if (ctx->d2th == NULL)
1387     {
1388       GNUNET_CORE_disconnect(ctx->d1core);
1389       GNUNET_free (ctx);
1390       if (NULL != ctx->cb)
1391         ctx->cb (ctx->cb_cls, &ctx->d1->id, &ctx->d2->id, ctx->d1->cfg, ctx->d2->cfg, ctx->d1, ctx->d2,
1392             _("Failed to connect to transport service!\n"));
1393       return;
1394     }
1395
1396   ctx->timeout_task = GNUNET_SCHEDULER_add_delayed (ctx->d1->sched,
1397                                                     GNUNET_TIME_relative_divide(ctx->relative_timeout, ctx->max_connect_attempts),
1398                                                     &notify_connect_result, ctx);
1399
1400   ctx->hello_send_task = GNUNET_SCHEDULER_add_now(ctx->d1->sched, &send_hello, ctx);
1401 }
1402
1403 /* end of testing.c */