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 3, 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_NO
  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   int msize;
  69   if (daemon == NULL)
  70     return;
  71
  72   if (daemon->server != NULL)
  73     {
  74       GNUNET_CORE_disconnect(daemon->server);
  75       daemon->server = NULL;
  76     }
  77
  78   GNUNET_assert (message != NULL);
  79   msize = ntohs(message->size);
  80   if (msize < 1)
  81     {
  82       return;
  83     }
  84   if (daemon->th != NULL)
  85     {
  86       GNUNET_TRANSPORT_get_hello_cancel(daemon->th, &process_hello, daemon);
  87     }
  88 #if DEBUG_TESTING
  89   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
  90               "Received `%s' from transport service of `%4s'\n",
  91               "HELLO", GNUNET_i2s (&daemon->id));
  92 #endif
  93
  94
  95
  96     {
  97       GNUNET_free_non_null(daemon->hello);
  98       daemon->hello = GNUNET_malloc(msize);
  99       memcpy(daemon->hello, message, msize);
 100
 101       if (daemon->th != NULL)
 102         {
 103           GNUNET_TRANSPORT_disconnect(daemon->th);
 104           daemon->th = NULL;
 105         }
 106     }
 107
 108 }
 109
 110 /**
 111  * Function called after GNUNET_CORE_connect has succeeded
 112  * (or failed for good).  Note that the private key of the
 113  * peer is intentionally not exposed here; if you need it,
 114  * your process should try to read the private key file
 115  * directly (which should work if you are authorized...).
 116  *
 117  * @param cls closure
 118  * @param server handle to the server, NULL if we failed
 119  * @param my_identity ID of this peer, NULL if we failed
 120  * @param publicKey public key of this peer, NULL if we failed
 121  */
 122 static void
 123 testing_init (void *cls,
 124               struct GNUNET_CORE_Handle *server,
 125               const struct GNUNET_PeerIdentity *my_identity,
 126               const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
 127 {
 128   struct GNUNET_TESTING_Daemon *d = cls;
 129   GNUNET_TESTING_NotifyDaemonRunning cb;
 130
 131   GNUNET_assert (d->phase == SP_START_CORE);
 132   d->phase = SP_START_DONE;
 133   cb = d->cb;
 134   d->cb = NULL;
 135   if (server == NULL)
 136     {
 137       d->server = NULL;
 138       if (GNUNET_YES == d->dead)
 139         GNUNET_TESTING_daemon_stop (d, GNUNET_TIME_absolute_get_remaining(d->max_timeout), d->dead_cb, d->dead_cb_cls, GNUNET_YES, GNUNET_NO);
 140       else if (NULL != cb)
 141         cb (d->cb_cls, NULL, d->cfg, d,
 142             _("Failed to connect to core service\n"));
 143       return;
 144     }
 145 #if DEBUG_TESTING
 146   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 147               "Successfully started peer `%4s'.\n", GNUNET_i2s (my_identity));
 148 #endif
 149   d->id = *my_identity;
 150   d->shortname = strdup (GNUNET_i2s (my_identity));
 151   d->server = server;
 152   d->running = GNUNET_YES;
 153   if (GNUNET_YES == d->dead)
 154     GNUNET_TESTING_daemon_stop (d, GNUNET_TIME_absolute_get_remaining(d->max_timeout), d->dead_cb, d->dead_cb_cls, GNUNET_YES, GNUNET_NO);
 155   else if (NULL != cb)
 156     cb (d->cb_cls, my_identity, d->cfg, d, NULL);
 157 #if DEBUG_TESTING
 158   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 159               "Successfully started peer `%4s'.\n", GNUNET_i2s (my_identity));
 160 #endif
 161
 162
 163   d->th = GNUNET_TRANSPORT_connect (d->sched,
 164                                     d->cfg,
 165                                     &d->id,
 166                                     d, NULL, NULL, NULL);
 167   if (d->th == NULL)
 168     {
 169       if (GNUNET_YES == d->dead)
 170         GNUNET_TESTING_daemon_stop (d, GNUNET_TIME_absolute_get_remaining(d->max_timeout), d->dead_cb, d->dead_cb_cls, GNUNET_YES, GNUNET_NO);
 171       else if (NULL != d->cb)
 172         d->cb (d->cb_cls, &d->id, d->cfg, d,
 173             _("Failed to connect to transport service!\n"));
 174       return;
 175     }
 176
 177   GNUNET_TRANSPORT_get_hello (d->th, &process_hello, d);
 178 }
 179
 180
 181 /**
 182  * Finite-state machine for starting GNUnet.
 183  *
 184  * @param cls our "struct GNUNET_TESTING_Daemon"
 185  * @param tc unused
 186  */
 187 static void
 188 start_fsm (void *cls,
 189            const struct GNUNET_SCHEDULER_TaskContext *tc)
 190 {
 191   struct GNUNET_TESTING_Daemon *d = cls;
 192   GNUNET_TESTING_NotifyDaemonRunning cb;
 193   enum GNUNET_OS_ProcessStatusType type;
 194   unsigned long code;
 195   char *dst;
 196   int bytes_read;
 197
 198 #if DEBUG_TESTING
 199   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 200               "Peer FSM is in phase %u.\n", d->phase);
 201 #endif
 202
 203   d->task = GNUNET_SCHEDULER_NO_TASK;
 204   switch (d->phase)
 205     {
 206     case SP_COPYING:
 207       /* confirm copying complete */
 208       if (GNUNET_OK != GNUNET_OS_process_status (d->pid, &type, &code))
 209         {
 210           if (GNUNET_TIME_absolute_get_remaining(d->max_timeout).value == 0)
 211             {
 212               cb = d->cb;
 213               d->cb = NULL;
 214               if (NULL != cb)
 215                 cb (d->cb_cls,
 216                     NULL,
 217                     d->cfg, d, _("`scp' does not seem to terminate (timeout copying config).\n"));
 218               return;
 219             }
 220           /* wait some more */
 221           d->task
 222             = GNUNET_SCHEDULER_add_delayed (d->sched,
 223                                             GNUNET_CONSTANTS_EXEC_WAIT,
 224                                             &start_fsm, d);
 225           return;
 226         }
 227       if ((type != GNUNET_OS_PROCESS_EXITED) || (code != 0))
 228         {
 229           cb = d->cb;
 230           d->cb = NULL;
 231           if (NULL != cb)
 232             cb (d->cb_cls,
 233                 NULL, d->cfg, d, _("`scp' did not complete cleanly.\n"));
 234           return;
 235         }
 236 #if DEBUG_TESTING
 237       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 238                   "Successfully copied configuration file.\n");
 239 #endif
 240       d->phase = SP_COPIED;
 241       /* fall-through */
 242     case SP_COPIED:
 243       /* Start create hostkey process */
 244       d->pipe_stdout = GNUNET_DISK_pipe (GNUNET_NO, GNUNET_NO, GNUNET_YES);
 245       if (d->pipe_stdout == NULL)
 246         {
 247           cb = d->cb;
 248           d->cb = NULL;
 249           if (NULL != cb)
 250             cb (d->cb_cls,
 251                 NULL,
 252                 d->cfg,
 253                 d,
 254                 (NULL == d->hostname)
 255                 ? _("Failed to create pipe for `gnunet-peerinfo' process.\n")
 256                 : _("Failed to create pipe for `ssh' process.\n"));
 257           return;
 258         }
 259       if (NULL == d->hostname)
 260         {
 261 #if DEBUG_TESTING
 262           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 263                       "Starting `%s', with command `%s %s %s %s'.\n",
 264                       "gnunet-peerinfo", "gnunet-peerinfo", "-c", d->cfgfile,
 265                       "-sq");
 266 #endif
 267           d->pid = GNUNET_OS_start_process (NULL, d->pipe_stdout, "gnunet-peerinfo",
 268                                             "gnunet-peerinfo",
 269                                             "-c", d->cfgfile,
 270                                             "-sq", NULL);
 271           GNUNET_DISK_pipe_close_end(d->pipe_stdout, GNUNET_DISK_PIPE_END_WRITE);
 272         }
 273       else
 274         {
 275           if (d->username != NULL)
 276             GNUNET_asprintf (&dst, "%s@%s", d->username, d->hostname);
 277           else
 278             dst = GNUNET_strdup (d->hostname);
 279
 280 #if DEBUG_TESTING
 281           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 282                       "Starting `%s', with command `%s %s %s %s %s %s'.\n",
 283                       "gnunet-peerinfo", "ssh", dst, "gnunet-peerinfo", "-c", d->cfgfile,
 284                       "-sq");
 285 #endif
 286           if (d->ssh_port_str == NULL)
 287             {
 288               d->pid = GNUNET_OS_start_process (NULL, d->pipe_stdout, "ssh",
 289                                                 "ssh",
 290 #if !DEBUG_TESTING
 291                                                 "-q",
 292 #endif
 293                                                 dst,
 294                                                 "gnunet-peerinfo",
 295                                                 "-c", d->cfgfile, "-sq", NULL);
 296             }
 297           else
 298             {
 299               d->pid = GNUNET_OS_start_process (NULL, d->pipe_stdout, "ssh",
 300                                                 "ssh", "-p", d->ssh_port_str,
 301 #if !DEBUG_TESTING
 302                                                 "-q",
 303 #endif
 304                                                 dst,
 305                                                 "gnunet-peerinfo",
 306                                                 "-c", d->cfgfile, "-sq", NULL);
 307             }
 308           GNUNET_DISK_pipe_close_end(d->pipe_stdout, GNUNET_DISK_PIPE_END_WRITE);
 309           GNUNET_free (dst);
 310         }
 311       if (-1 == d->pid)
 312         {
 313           GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 314                       _("Could not start `%s' process to create hostkey.\n"),
 315                       (NULL == d->hostname) ? "gnunet-peerinfo" : "ssh");
 316           cb = d->cb;
 317           d->cb = NULL;
 318           if (NULL != cb)
 319             cb (d->cb_cls,
 320                 NULL,
 321                 d->cfg,
 322                 d,
 323                 (NULL == d->hostname)
 324                 ? _("Failed to start `gnunet-peerinfo' process.\n")
 325                 : _("Failed to start `ssh' process.\n"));
 326           GNUNET_DISK_pipe_close(d->pipe_stdout);
 327           return;
 328         }
 329 #if DEBUG_TESTING
 330       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 331                   "Started `%s', waiting for hostkey.\n",
 332                   "gnunet-peerinfo");
 333 #endif
 334       d->phase = SP_HOSTKEY_CREATE;
 335       d->task
 336         = GNUNET_SCHEDULER_add_read_file (d->sched,
 337                                           GNUNET_TIME_absolute_get_remaining(d->max_timeout),
 338                                           GNUNET_DISK_pipe_handle(d->pipe_stdout,
 339                                                                   GNUNET_DISK_PIPE_END_READ),
 340                                           &start_fsm,
 341                                           d);
 342       break;
 343     case SP_HOSTKEY_CREATE:
 344       bytes_read = GNUNET_DISK_file_read(GNUNET_DISK_pipe_handle(d->pipe_stdout,
 345                                                                  GNUNET_DISK_PIPE_END_READ),
 346                                          &d->hostkeybuf[d->hostkeybufpos],
 347                                          sizeof(d->hostkeybuf) - d->hostkeybufpos);
 348       if (bytes_read > 0)
 349         d->hostkeybufpos += bytes_read;
 350
 351       if ( (d->hostkeybufpos < 104) &&
 352            (bytes_read > 0) )
 353         {
 354           /* keep reading */
 355           d->task
 356             = GNUNET_SCHEDULER_add_read_file (d->sched,
 357                                               GNUNET_TIME_absolute_get_remaining(d->max_timeout),
 358                                               GNUNET_DISK_pipe_handle(d->pipe_stdout,
 359                                                                       GNUNET_DISK_PIPE_END_READ),
 360                                               &start_fsm,
 361                                               d);
 362           return;
 363         }
 364       d->hostkeybuf[103] = '\0';
 365       if ( (bytes_read < 0) ||
 366            (GNUNET_OK != GNUNET_CRYPTO_hash_from_string (d->hostkeybuf,
 367                                                          &d->id.hashPubKey)) )
 368         {
 369           /* error */
 370           if (bytes_read < 0)
 371             GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
 372                        _("Error reading from gnunet-peerinfo: %s\n"),
 373                        STRERROR (errno));
 374           else
 375             GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
 376                        _("Malformed output from gnunet-peerinfo!\n"));
 377           cb = d->cb;
 378           d->cb = NULL;
 379           GNUNET_DISK_pipe_close(d->pipe_stdout);
 380           d->pipe_stdout = NULL;
 381           (void) PLIBC_KILL (d->pid, SIGKILL);
 382           GNUNET_break (GNUNET_OK == GNUNET_OS_process_wait (d->pid));
 383           d->pid = 0;
 384           if (NULL != cb)
 385             cb (d->cb_cls,
 386                 NULL,
 387                 d->cfg,
 388                 d,
 389                 _("`Failed to get hostkey!\n"));
 390           return;
 391         }
 392       GNUNET_DISK_pipe_close(d->pipe_stdout);
 393       d->pipe_stdout = NULL;
 394       (void) PLIBC_KILL (d->pid, SIGKILL);
 395       GNUNET_break (GNUNET_OK == GNUNET_OS_process_wait (d->pid));
 396       d->pid = 0;
 397 #if DEBUG_TESTING
 398       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 399                   "Successfully got hostkey!\n");
 400 #endif
 401       if (d->hostkey_callback != NULL)
 402         {
 403           d->hostkey_callback(d->hostkey_cls, &d->id, d, NULL);
 404           d->phase = SP_HOSTKEY_CREATED;
 405         }
 406       else
 407         {
 408           d->phase = SP_TOPOLOGY_SETUP;
 409         }
 410       /* Fall through */
 411     case SP_HOSTKEY_CREATED:
 412       /* wait for topology finished */
 413       if ((GNUNET_YES == d->dead) || (GNUNET_TIME_absolute_get_remaining(d->max_timeout).value == 0))
 414         {
 415           cb = d->cb;
 416           d->cb = NULL;
 417           if (NULL != cb)
 418             cb (d->cb_cls,
 419                 NULL,
 420                 d->cfg,
 421                 d,
 422                 _("`Failed while waiting for topology setup!\n"));
 423           return;
 424         }
 425
 426       d->task
 427         = GNUNET_SCHEDULER_add_delayed (d->sched,
 428                                         GNUNET_CONSTANTS_EXEC_WAIT,
 429                                         &start_fsm, d);
 430       break;
 431     case SP_TOPOLOGY_SETUP:
 432       /* start GNUnet on remote host */
 433       if (NULL == 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'.\n",
 438                       "gnunet-arm", "gnunet-arm", "-c", d->cfgfile,
 439                       "-L", "DEBUG",
 440                       "-s");
 441 #endif
 442           d->pid = GNUNET_OS_start_process (NULL, NULL, "gnunet-arm",
 443                                             "gnunet-arm",
 444                                             "-c", d->cfgfile,
 445 #if DEBUG_TESTING
 446                                             "-L", "DEBUG",
 447 #endif
 448                                             "-s", "-q", NULL);
 449         }
 450       else
 451         {
 452           if (d->username != NULL)
 453             GNUNET_asprintf (&dst, "%s@%s", d->username, d->hostname);
 454           else
 455             dst = GNUNET_strdup (d->hostname);
 456
 457 #if DEBUG_TESTING
 458           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 459                       "Starting `%s', with command `%s %s %s %s %s %s %s %s'.\n",
 460                       "gnunet-arm", "ssh", dst, "gnunet-arm", "-c", d->cfgfile,
 461                       "-L", "DEBUG", "-s", "-q");
 462 #endif
 463           if (d->ssh_port_str == NULL)
 464             {
 465               d->pid = GNUNET_OS_start_process (NULL, NULL, "ssh",
 466                                                 "ssh",
 467 #if !DEBUG_TESTING
 468                                                 "-q",
 469 #endif
 470                                                 dst,
 471                                                 "gnunet-arm",
 472 #if DEBUG_TESTING
 473                                                 "-L", "DEBUG",
 474 #endif
 475                                                 "-c", d->cfgfile, "-s", "-q", NULL);
 476             }
 477           else
 478             {
 479
 480               d->pid = GNUNET_OS_start_process (NULL, NULL, "ssh",
 481                                                 "ssh", "-p", d->ssh_port_str,
 482 #if !DEBUG_TESTING
 483                                                 "-q",
 484 #endif
 485                                                 dst,
 486                                                 "gnunet-arm",
 487 #if DEBUG_TESTING
 488                                                 "-L", "DEBUG",
 489 #endif
 490                                                 "-c", d->cfgfile, "-s", "-q", NULL);
 491             }
 492           GNUNET_free (dst);
 493         }
 494       if (-1 == d->pid)
 495         {
 496           GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 497                       _("Could not start `%s' process to start GNUnet.\n"),
 498                       (NULL == d->hostname) ? "gnunet-arm" : "ssh");
 499           cb = d->cb;
 500           d->cb = NULL;
 501           if (NULL != cb)
 502             cb (d->cb_cls,
 503                 NULL,
 504                 d->cfg,
 505                 d,
 506                 (NULL == d->hostname)
 507                 ? _("Failed to start `gnunet-arm' process.\n")
 508                 : _("Failed to start `ssh' process.\n"));
 509           return;
 510         }
 511 #if DEBUG_TESTING
 512       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 513                   "Started `%s', waiting for `%s' to be up.\n",
 514                   "gnunet-arm", "gnunet-service-core");
 515 #endif
 516       d->phase = SP_START_ARMING;
 517       d->task
 518         = GNUNET_SCHEDULER_add_delayed (d->sched,
 519                                         GNUNET_CONSTANTS_EXEC_WAIT,
 520                                         &start_fsm, d);
 521       break;
 522     case SP_START_ARMING:
 523       if (GNUNET_OK != GNUNET_OS_process_status (d->pid, &type, &code))
 524         {
 525           if (GNUNET_TIME_absolute_get_remaining(d->max_timeout).value == 0)
 526             {
 527               cb = d->cb;
 528               d->cb = NULL;
 529               if (NULL != cb)
 530                 cb (d->cb_cls,
 531                     NULL,
 532                     d->cfg,
 533                     d,
 534                     (NULL == d->hostname)
 535                     ? _("`gnunet-arm' does not seem to terminate.\n")
 536                     : _("`ssh' does not seem to terminate.\n"));
 537               return;
 538             }
 539           /* wait some more */
 540           d->task
 541             = GNUNET_SCHEDULER_add_delayed (d->sched,
 542                                             GNUNET_CONSTANTS_EXEC_WAIT,
 543                                             &start_fsm, d);
 544           return;
 545         }
 546 #if DEBUG_TESTING
 547       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 548                   "Successfully started `%s'.\n", "gnunet-arm");
 549 #endif
 550       d->phase = SP_START_CORE;
 551       d->server = GNUNET_CORE_connect (d->sched,
 552                                        d->cfg,
 553                                        ARM_START_WAIT,
 554                                        d,
 555                                        &testing_init,
 556                                        NULL, NULL, NULL,
 557                                        NULL, GNUNET_NO,
 558                                        NULL, GNUNET_NO, no_handlers);
 559       break;
 560     case SP_START_CORE:
 561       GNUNET_break (0);
 562       break;
 563     case SP_START_DONE:
 564       GNUNET_break (0);
 565       break;
 566     case SP_SHUTDOWN_START:
 567       /* confirm copying complete */
 568       if (GNUNET_OK != GNUNET_OS_process_status (d->pid, &type, &code))
 569         {
 570           if (GNUNET_TIME_absolute_get_remaining(d->max_timeout).value == 0)
 571             {
 572               if (NULL != d->dead_cb)
 573                 d->dead_cb (d->dead_cb_cls,
 574                             _("either `gnunet-arm' or `ssh' does not seem to terminate.\n"));
 575               if (d->th != NULL)
 576                 {
 577                   GNUNET_TRANSPORT_get_hello_cancel(d->th, &process_hello, d);
 578                   GNUNET_TRANSPORT_disconnect(d->th);
 579                   d->th = NULL;
 580                 }
 581               GNUNET_CONFIGURATION_destroy (d->cfg);
 582               GNUNET_free (d->cfgfile);
 583               GNUNET_free_non_null(d->hello);
 584               GNUNET_free_non_null (d->hostname);
 585               GNUNET_free_non_null (d->username);
 586               GNUNET_free_non_null (d->shortname);
 587               GNUNET_free (d);
 588               return;
 589             }
 590           /* wait some more */
 591           d->task
 592             = GNUNET_SCHEDULER_add_delayed (d->sched,
 593                                             GNUNET_CONSTANTS_EXEC_WAIT,
 594                                             &start_fsm, d);
 595           return;
 596         }
 597       if ((type != GNUNET_OS_PROCESS_EXITED) || (code != 0))
 598         {
 599           if (NULL != d->dead_cb)
 600             d->dead_cb (d->dead_cb_cls,
 601                         _("shutdown (either `gnunet-arm' or `ssh') did not complete cleanly.\n"));
 602           if (d->th != NULL)
 603             {
 604               GNUNET_TRANSPORT_get_hello_cancel(d->th, &process_hello, d);
 605               GNUNET_TRANSPORT_disconnect(d->th);
 606               d->th = NULL;
 607             }
 608           GNUNET_CONFIGURATION_destroy (d->cfg);
 609           GNUNET_free (d->cfgfile);
 610           GNUNET_free_non_null(d->hello);
 611           GNUNET_free_non_null (d->hostname);
 612           GNUNET_free_non_null (d->username);
 613           GNUNET_free_non_null (d->shortname);
 614           GNUNET_free (d);
 615           return;
 616         }
 617 #if DEBUG_TESTING
 618       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Peer shutdown complete.\n");
 619 #endif
 620       if (d->th != NULL)
 621         {
 622           GNUNET_TRANSPORT_get_hello_cancel(d->th, &process_hello, d);
 623           GNUNET_TRANSPORT_disconnect(d->th);
 624           d->th = NULL;
 625         }
 626       /* state clean up and notifications */
 627       if (d->churn == GNUNET_NO)
 628         {
 629           GNUNET_CONFIGURATION_destroy (d->cfg);
 630           GNUNET_free (d->cfgfile);
 631           GNUNET_free_non_null (d->hostname);
 632           GNUNET_free_non_null (d->username);
 633         }
 634
 635       GNUNET_free_non_null(d->hello);
 636       d->hello = NULL;
 637       GNUNET_free_non_null (d->shortname);
 638       d->shortname = NULL;
 639       if (NULL != d->dead_cb)
 640         d->dead_cb (d->dead_cb_cls, NULL);
 641
 642       if (d->churn == GNUNET_NO)
 643         GNUNET_free (d);
 644
 645       break;
 646     case SP_CONFIG_UPDATE:
 647       /* confirm copying complete */
 648       if (GNUNET_OK != GNUNET_OS_process_status (d->pid, &type, &code))
 649         {
 650           if (GNUNET_TIME_absolute_get_remaining(d->max_timeout).value == 0) /* FIXME: config update should take timeout parameter! */
 651             {
 652               cb = d->cb;
 653               d->cb = NULL;
 654               if (NULL != cb)
 655                 cb (d->cb_cls,
 656                     NULL,
 657                     d->cfg, d, _("`scp' does not seem to terminate.\n"));
 658               return;
 659             }
 660           /* wait some more */
 661           d->task
 662             = GNUNET_SCHEDULER_add_delayed (d->sched,
 663                                             GNUNET_CONSTANTS_EXEC_WAIT,
 664                                             &start_fsm, d);
 665           return;
 666         }
 667       if ((type != GNUNET_OS_PROCESS_EXITED) || (code != 0))
 668         {
 669           if (NULL != d->update_cb)
 670             d->update_cb (d->update_cb_cls,
 671                           _("`scp' did not complete cleanly.\n"));
 672           return;
 673         }
 674 #if DEBUG_TESTING
 675       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 676                   "Successfully copied configuration file.\n");
 677 #endif
 678       if (NULL != d->update_cb)
 679         d->update_cb (d->update_cb_cls, NULL);
 680       d->phase = SP_START_DONE;
 681       break;
 682     }
 683 }
 684
 685 /**
 686  * Continues GNUnet daemon startup when user wanted to be notified
 687  * once a hostkey was generated (for creating friends files, blacklists,
 688  * etc.).
 689  *
 690  * @param daemon the daemon to finish starting
 691  */
 692 void
 693 GNUNET_TESTING_daemon_continue_startup(struct GNUNET_TESTING_Daemon *daemon)
 694 {
 695   GNUNET_assert(daemon->phase == SP_HOSTKEY_CREATED);
 696   daemon->phase = SP_TOPOLOGY_SETUP;
 697 }
 698
 699
 700 /**
 701  * Start a peer that has previously been stopped using the daemon_stop
 702  * call (and files weren't deleted and the allow restart flag)
 703  *
 704  * @param daemon the daemon to start (has been previously stopped)
 705  * @param timeout how long to wait for restart
 706  * @param cb the callback for notification when the peer is running
 707  * @param cb_cls closure for the callback
 708  */
 709 void
 710 GNUNET_TESTING_daemon_start_stopped (struct GNUNET_TESTING_Daemon *daemon,
 711                                      struct GNUNET_TIME_Relative timeout,
 712                                      GNUNET_TESTING_NotifyDaemonRunning cb,
 713                                      void *cb_cls)
 714 {
 715   if (daemon->running == GNUNET_YES)
 716   {
 717     cb(cb_cls, &daemon->id, daemon->cfg, daemon, "Daemon already running, can't restart!");
 718     return;
 719   }
 720
 721   daemon->cb = cb;
 722   daemon->cb_cls = cb_cls;
 723   daemon->phase = SP_TOPOLOGY_SETUP;
 724   daemon->max_timeout = GNUNET_TIME_relative_to_absolute(timeout);
 725
 726   GNUNET_SCHEDULER_add_continuation (daemon->sched,
 727                                      &start_fsm,
 728                                      daemon,
 729                                      GNUNET_SCHEDULER_REASON_PREREQ_DONE);
 730 }
 731
 732 /**
 733  * Starts a GNUnet daemon.  GNUnet must be installed on the target
 734  * system and available in the PATH.  The machine must furthermore be
 735  * reachable via "ssh" (unless the hostname is "NULL") without the
 736  * need to enter a password.
 737  *
 738  * @param sched scheduler to use
 739  * @param cfg configuration to use
 740  * @param timeout how long to wait starting up peers
 741  * @param hostname name of the machine where to run GNUnet
 742  *        (use NULL for localhost).
 743  * @param ssh_username ssh username to use when connecting to hostname
 744  * @param sshport port to pass to ssh process when connecting to hostname
 745  * @param hostkey_callback function to call once the hostkey has been
 746  *        generated for this peer, but it hasn't yet been started
 747  *        (NULL to start immediately, otherwise waits on GNUNET_TESTING_daemon_continue_start)
 748  * @param hostkey_cls closure for hostkey callback
 749  * @param cb function to call once peer is up, or failed to start
 750  * @param cb_cls closure for cb
 751  * @return handle to the daemon (actual start will be completed asynchronously)
 752  */
 753 struct GNUNET_TESTING_Daemon *
 754 GNUNET_TESTING_daemon_start (struct GNUNET_SCHEDULER_Handle *sched,
 755                              const struct GNUNET_CONFIGURATION_Handle *cfg,
 756                              struct GNUNET_TIME_Relative timeout,
 757                              const char *hostname,
 758                              const char *ssh_username,
 759                              uint16_t sshport,
 760                              GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback,
 761                              void *hostkey_cls,
 762                              GNUNET_TESTING_NotifyDaemonRunning cb,
 763                              void *cb_cls)
 764 {
 765   struct GNUNET_TESTING_Daemon *ret;
 766   char *arg;
 767   char *username;
 768
 769   ret = GNUNET_malloc (sizeof (struct GNUNET_TESTING_Daemon));
 770   ret->sched = sched;
 771   ret->hostname = (hostname == NULL) ? NULL : GNUNET_strdup (hostname);
 772   if (sshport != 0)
 773     {
 774       GNUNET_asprintf(&ret->ssh_port_str, "%d", sshport);
 775     }
 776   else
 777     ret->ssh_port_str = NULL;
 778   ret->cfgfile = GNUNET_DISK_mktemp ("gnunet-testing-config");
 779 #if DEBUG_TESTING
 780   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 781               "Setting up peer with configuration file `%s'.\n",
 782               ret->cfgfile);
 783 #endif
 784   if (NULL == ret->cfgfile)
 785     {
 786       GNUNET_free_non_null (ret->hostname);
 787       GNUNET_free (ret);
 788       return NULL;
 789     }
 790   ret->hostkey_callback = hostkey_callback;
 791   ret->hostkey_cls = hostkey_cls;
 792   ret->cb = cb;
 793   ret->cb_cls = cb_cls;
 794   ret->max_timeout = GNUNET_TIME_relative_to_absolute(timeout);
 795   ret->cfg = GNUNET_CONFIGURATION_dup (cfg);
 796   GNUNET_CONFIGURATION_set_value_string (ret->cfg,
 797                                          "PATHS",
 798                                          "DEFAULTCONFIG", ret->cfgfile);
 799   /* 1) write configuration to temporary file */
 800   if (GNUNET_OK != GNUNET_CONFIGURATION_write (ret->cfg, ret->cfgfile))
 801     {
 802       if (0 != UNLINK (ret->cfgfile))
 803         GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
 804                                   "unlink", ret->cfgfile);
 805       GNUNET_CONFIGURATION_destroy (ret->cfg);
 806       GNUNET_free_non_null (ret->hostname);
 807       GNUNET_free (ret->cfgfile);
 808       GNUNET_free (ret);
 809       return NULL;
 810     }
 811   if (ssh_username != NULL)
 812     username = GNUNET_strdup(ssh_username);
 813   if ((ssh_username == NULL) && (GNUNET_OK !=
 814       GNUNET_CONFIGURATION_get_value_string (cfg,
 815                                              "TESTING",
 816                                              "USERNAME", &username)))
 817     {
 818       if (NULL != getenv ("USER"))
 819         username = GNUNET_strdup (getenv ("USER"));
 820       else
 821         username = NULL;
 822     }
 823   ret->username = username;
 824
 825   /* 2) copy file to remote host */
 826   if (NULL != hostname)
 827     {
 828 #if DEBUG_TESTING
 829       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 830                   "Copying configuration file to host `%s'.\n", hostname);
 831 #endif
 832       ret->phase = SP_COPYING;
 833       if (NULL != username)
 834         GNUNET_asprintf (&arg, "%s@%s:%s", username, hostname, ret->cfgfile);
 835       else
 836         GNUNET_asprintf (&arg, "%s:%s", hostname, ret->cfgfile);
 837
 838       if (ret->ssh_port_str == NULL)
 839         {
 840           ret->pid = GNUNET_OS_start_process (NULL, NULL, "scp",
 841                                               "scp",
 842 #if !DEBUG_TESTING
 843                                               "-q",
 844 #endif
 845                                               ret->cfgfile, arg, NULL);
 846         }
 847       else
 848         {
 849           ret->pid = GNUNET_OS_start_process (NULL, NULL, "scp",
 850                                               "scp", "-P", ret->ssh_port_str,
 851 #if !DEBUG_TESTING
 852                                               "-q",
 853 #endif
 854                                               ret->cfgfile, arg, NULL);
 855         }
 856       GNUNET_free (arg);
 857       if (-1 == ret->pid)
 858         {
 859           GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 860                       _
 861                       ("Could not start `%s' process to copy configuration file.\n"),
 862                       "scp");
 863           if (0 != UNLINK (ret->cfgfile))
 864             GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING,
 865                                       "unlink", ret->cfgfile);
 866           GNUNET_CONFIGURATION_destroy (ret->cfg);
 867           GNUNET_free_non_null (ret->hostname);
 868           GNUNET_free_non_null (ret->username);
 869           GNUNET_free (ret->cfgfile);
 870           GNUNET_free (ret);
 871           return NULL;
 872         }
 873       ret->task
 874         = GNUNET_SCHEDULER_add_delayed (sched,
 875                                         GNUNET_CONSTANTS_EXEC_WAIT,
 876                                         &start_fsm, ret);
 877       return ret;
 878     }
 879 #if DEBUG_TESTING
 880   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 881               "No need to copy configuration file since we are running locally.\n");
 882 #endif
 883   ret->phase = SP_COPIED;
 884   GNUNET_SCHEDULER_add_continuation (sched,
 885                                      &start_fsm,
 886                                      ret,
 887                                      GNUNET_SCHEDULER_REASON_PREREQ_DONE);
 888   return ret;
 889 }
 890
 891
 892 /**
 893  * Restart (stop and start) a GNUnet daemon.
 894  *
 895  * @param d the daemon that should be restarted
 896  * @param cb function called once the daemon is (re)started
 897  * @param cb_cls closure for cb
 898  */
 899 void
 900 GNUNET_TESTING_daemon_restart (struct GNUNET_TESTING_Daemon *d,
 901                                GNUNET_TESTING_NotifyDaemonRunning cb, void *cb_cls)
 902 {
 903   char *arg;
 904   char *del_arg;
 905
 906   del_arg = NULL;
 907   if (NULL != d->cb)
 908     {
 909       d->dead = GNUNET_YES;
 910       return;
 911     }
 912
 913   d->cb = cb;
 914   d->cb_cls = cb_cls;
 915
 916   if (d->phase == SP_CONFIG_UPDATE)
 917     {
 918       GNUNET_SCHEDULER_cancel (d->sched, d->task);
 919       d->phase = SP_START_DONE;
 920     }
 921   if (d->server != NULL)
 922     {
 923       GNUNET_CORE_disconnect (d->server);
 924       d->server = NULL;
 925     }
 926
 927   if (d->th != NULL)
 928     {
 929       GNUNET_TRANSPORT_get_hello_cancel(d->th, &process_hello, d);
 930       GNUNET_TRANSPORT_disconnect(d->th);
 931       d->th = NULL;
 932     }
 933   /* state clean up and notifications */
 934   GNUNET_free_non_null(d->hello);
 935
 936 #if DEBUG_TESTING
 937     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 938                 _("Terminating peer `%4s'\n"), GNUNET_i2s (&d->id));
 939 #endif
 940
 941    d->phase = SP_START_ARMING;
 942
 943     /* Check if this is a local or remote process */
 944   if (NULL != d->hostname)
 945     {
 946 #if DEBUG_TESTING
 947       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 948                   "Stopping gnunet-arm with config `%s' on host `%s'.\n", d->cfgfile, d->hostname);
 949 #endif
 950
 951       if (d->username != NULL)
 952         GNUNET_asprintf (&arg, "%s@%s", d->username, d->hostname);
 953       else
 954         arg = GNUNET_strdup (d->hostname);
 955
 956       d->pid = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh",
 957 #if !DEBUG_TESTING
 958                                         "-q",
 959 #endif
 960                                         arg, "gnunet-arm",
 961 #if DEBUG_TESTING
 962                                         "-L", "DEBUG",
 963 #endif
 964                                         "-c", d->cfgfile, "-e", "-r", NULL);
 965       /* Use -r to restart arm and all services */
 966
 967       GNUNET_free (arg);
 968     }
 969   else
 970     {
 971 #if DEBUG_TESTING
 972       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 973                   "Stopping gnunet-arm with config `%s' locally.\n", d->cfgfile);
 974 #endif
 975       d->pid = GNUNET_OS_start_process (NULL, NULL, "gnunet-arm",
 976                                         "gnunet-arm",
 977 #if DEBUG_TESTING
 978                                         "-L", "DEBUG",
 979 #endif
 980                                         "-c", d->cfgfile, "-e", "-r", NULL);
 981     }
 982
 983     GNUNET_free_non_null(del_arg);
 984     d->task
 985       = GNUNET_SCHEDULER_add_delayed (d->sched,
 986                                       GNUNET_CONSTANTS_EXEC_WAIT,
 987                                       &start_fsm, d);
 988
 989 }
 990
 991
 992 /**
 993  * Stops a GNUnet daemon.
 994  *
 995  * @param d the daemon that should be stopped
 996  * @param timeout how long to wait for process for shutdown to complete
 997  * @param cb function called once the daemon was stopped
 998  * @param cb_cls closure for cb
 999  * @param delete_files GNUNET_YES to remove files, GNUNET_NO
1000  *        to leave them
1001  * @param allow_restart GNUNET_YES to restart peer later (using this API)
1002  *        GNUNET_NO to kill off and clean up for good
1003  */
1004 void
1005 GNUNET_TESTING_daemon_stop (struct GNUNET_TESTING_Daemon *d,
1006                             struct GNUNET_TIME_Relative timeout,
1007                             GNUNET_TESTING_NotifyCompletion cb, void *cb_cls,
1008                             int delete_files,
1009                             int allow_restart)
1010 {
1011   char *arg;
1012   char *del_arg;
1013   d->dead_cb = cb;
1014   d->dead_cb_cls = cb_cls;
1015
1016   if (NULL != d->cb)
1017     {
1018 #if DEBUG_TESTING
1019       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1020                  _("Setting d->dead on peer `%4s'\n"), GNUNET_i2s (&d->id));
1021 #endif
1022       d->dead = GNUNET_YES;
1023       return;
1024     }
1025
1026   if ((d->running == GNUNET_NO) && (d->churn == GNUNET_YES)) /* Peer has already been stopped in churn context! */
1027     {
1028       /* Free what was left from churning! */
1029       GNUNET_assert(d->cfg != NULL);
1030       GNUNET_CONFIGURATION_destroy (d->cfg);
1031       if (delete_files == GNUNET_YES)
1032         {
1033           if (0 != UNLINK(d->cfgfile))
1034             {
1035               GNUNET_log_strerror(GNUNET_ERROR_TYPE_WARNING, "unlink");
1036             }
1037         }
1038       GNUNET_free (d->cfgfile);
1039       GNUNET_free_non_null (d->hostname);
1040       GNUNET_free_non_null (d->username);
1041       if (NULL != d->dead_cb)
1042         d->dead_cb (d->dead_cb_cls, NULL);
1043       GNUNET_free(d);
1044       return;
1045     }
1046
1047   del_arg = NULL;
1048   if (delete_files == GNUNET_YES)
1049     {
1050       GNUNET_asprintf(&del_arg, "-d");
1051     }
1052
1053   if (d->phase == SP_CONFIG_UPDATE)
1054     {
1055       GNUNET_SCHEDULER_cancel (d->sched, d->task);
1056       d->phase = SP_START_DONE;
1057     }
1058   if (d->server != NULL)
1059     {
1060       GNUNET_CORE_disconnect (d->server);
1061       d->server = NULL;
1062     }
1063   /* shutdown ARM process (will terminate others) */
1064 #if DEBUG_TESTING
1065   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1066               _("Terminating peer `%4s'\n"), GNUNET_i2s (&d->id));
1067 #endif
1068   d->phase = SP_SHUTDOWN_START;
1069   d->running = GNUNET_NO;
1070   if (allow_restart == GNUNET_YES)
1071     d->churn = GNUNET_YES;
1072   if (d->th != NULL)
1073     {
1074       GNUNET_TRANSPORT_get_hello_cancel(d->th, &process_hello, d);
1075       GNUNET_TRANSPORT_disconnect(d->th);
1076       d->th = NULL;
1077     }
1078   /* Check if this is a local or remote process */
1079   if (NULL != d->hostname)
1080     {
1081 #if DEBUG_TESTING
1082       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1083                   "Stopping gnunet-arm with config `%s' on host `%s'.\n", d->cfgfile, d->hostname);
1084 #endif
1085
1086       if (d->username != NULL)
1087         GNUNET_asprintf (&arg, "%s@%s", d->username, d->hostname);
1088       else
1089         arg = GNUNET_strdup (d->hostname);
1090
1091       d->pid = GNUNET_OS_start_process (NULL, NULL, "ssh", "ssh",
1092 #if !DEBUG_TESTING
1093                                         "-q",
1094 #endif
1095                                         arg, "gnunet-arm",
1096 #if DEBUG_TESTING
1097                                         "-L", "DEBUG",
1098 #endif
1099                                         "-c", d->cfgfile, "-e", "-q", del_arg, NULL);
1100       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1101                   "Stopping gnunet-arm with command ssh %s gnunet-arm -c %s -e -q %s\n", arg, "gnunet-arm", d->cfgfile, del_arg);
1102       /* Use -e to end arm, and -d to remove temp files */
1103       GNUNET_free (arg);
1104     }
1105   else
1106     {
1107 #if DEBUG_TESTING
1108       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1109                   "Stopping gnunet-arm with config `%s' locally.\n", d->cfgfile);
1110 #endif
1111       d->pid = GNUNET_OS_start_process (NULL, NULL, "gnunet-arm",
1112                                         "gnunet-arm",
1113 #if DEBUG_TESTING
1114                                         "-L", "DEBUG",
1115 #endif
1116                                         "-c", d->cfgfile, "-e", "-q", del_arg, NULL);
1117     }
1118
1119   GNUNET_free_non_null(del_arg);
1120   d->max_timeout = GNUNET_TIME_relative_to_absolute(timeout);
1121   d->task
1122     = GNUNET_SCHEDULER_add_now (d->sched,
1123                                 &start_fsm, d);
1124 }
1125
1126
1127 /**
1128  * Changes the configuration of a GNUnet daemon.
1129  *
1130  * @param d the daemon that should be modified
1131  * @param cfg the new configuration for the daemon
1132  * @param cb function called once the configuration was changed
1133  * @param cb_cls closure for cb
1134  */
1135 void
1136 GNUNET_TESTING_daemon_reconfigure (struct GNUNET_TESTING_Daemon *d,
1137                                    struct GNUNET_CONFIGURATION_Handle *cfg,
1138                                    GNUNET_TESTING_NotifyCompletion cb,
1139                                    void *cb_cls)
1140 {
1141   char *arg;
1142
1143   if (d->phase != SP_START_DONE)
1144     {
1145       if (NULL != cb)
1146         cb (cb_cls,
1147             _
1148             ("Peer not yet running, can not change configuration at this point."));
1149       return;
1150     }
1151
1152   /* 1) write configuration to temporary file */
1153   if (GNUNET_OK != GNUNET_CONFIGURATION_write (cfg, d->cfgfile))
1154     {
1155       if (NULL != cb)
1156         cb (cb_cls, _("Failed to write new configuration to disk."));
1157       return;
1158     }
1159
1160   /* 2) copy file to remote host (if necessary) */
1161   if (NULL == d->hostname)
1162     {
1163       /* signal success */
1164       if (NULL != cb)
1165         cb (cb_cls, NULL);
1166       return;
1167     }
1168 #if DEBUG_TESTING
1169   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1170               "Copying updated configuration file to remote host `%s'.\n",
1171               d->hostname);
1172 #endif
1173   d->phase = SP_CONFIG_UPDATE;
1174   if (NULL != d->username)
1175     GNUNET_asprintf (&arg, "%s@%s:%s", d->username, d->hostname, d->cfgfile);
1176   else
1177     GNUNET_asprintf (&arg, "%s:%s", d->hostname, d->cfgfile);
1178   d->pid = GNUNET_OS_start_process (NULL, NULL, "scp", "scp",
1179 #if !DEBUG_TESTING
1180                                     "-q",
1181 #endif
1182                                     d->cfgfile, arg, NULL);
1183   GNUNET_free (arg);
1184   if (-1 == d->pid)
1185     {
1186       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1187                   _
1188                   ("Could not start `%s' process to copy configuration file.\n"),
1189                   "scp");
1190       if (NULL != cb)
1191         cb (cb_cls, _("Failed to copy new configuration to remote machine."));
1192       d->phase = SP_START_DONE;
1193       return;
1194     }
1195   d->update_cb = cb;
1196   d->update_cb_cls = cb_cls;
1197   d->task
1198     = GNUNET_SCHEDULER_add_delayed (d->sched,
1199                                     GNUNET_CONSTANTS_EXEC_WAIT,
1200                                     &start_fsm, d);
1201 }
1202
1203
1204 /**
1205  * Data kept for each pair of peers that we try
1206  * to connect.
1207  */
1208 struct ConnectContext
1209 {
1210   /**
1211    * Testing handle to the first daemon.
1212    */
1213   struct GNUNET_TESTING_Daemon *d1;
1214
1215   /**
1216    * Handle to core of first daemon (to check connect)
1217    */
1218   struct GNUNET_CORE_Handle * d1core;
1219
1220   /**
1221    * Testing handle to the second daemon.
1222    */
1223   struct GNUNET_TESTING_Daemon *d2;
1224
1225   /**
1226    * Handler for the request to core to connect to this peer.
1227    */
1228   struct GNUNET_CORE_PeerRequestHandle *connect_request_handle;
1229
1230   /**
1231    * Transport handle to the second daemon.
1232    */
1233   struct GNUNET_TRANSPORT_Handle *d2th;
1234
1235   /**
1236    * Function to call once we are done (or have timed out).
1237    */
1238   GNUNET_TESTING_NotifyConnection cb;
1239
1240   /**
1241    * Closure for "nb".
1242    */
1243   void *cb_cls;
1244
1245   /**
1246    * When should this operation be complete (or we must trigger
1247    * a timeout).
1248    */
1249   struct GNUNET_TIME_Absolute timeout;
1250
1251   /**
1252    * The relative timeout from whence this connect attempt was
1253    * started.  Allows for reconnect attempts.
1254    */
1255   struct GNUNET_TIME_Relative relative_timeout;
1256
1257   /**
1258    * Maximum number of connect attempts, will retry connection
1259    * this number of times on failures.
1260    */
1261   unsigned int max_connect_attempts;
1262
1263   /**
1264    * Hello timeout task
1265    */
1266   GNUNET_SCHEDULER_TaskIdentifier hello_send_task;
1267
1268   /**
1269    * Connect timeout task
1270    */
1271   GNUNET_SCHEDULER_TaskIdentifier timeout_task;
1272
1273   /**
1274    * When should this operation be complete (or we must trigger
1275    * a timeout).
1276    */
1277   struct GNUNET_TIME_Relative timeout_hello;
1278
1279   /**
1280    * Was the connection attempt successful?
1281    */
1282   int connected;
1283
1284   /**
1285    * The distance between the two connected peers
1286    */
1287   uint32_t distance;
1288 };
1289
1290
1291 /** Forward declaration **/
1292 static void
1293 reattempt_daemons_connect(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1294
1295
1296 /**
1297  * Notify callback about success or failure of the attempt
1298  * to connect the two peers
1299  *
1300  * @param cls our "struct ConnectContext" (freed)
1301  * @param tc reason tells us if we succeeded or failed
1302  */
1303 static void
1304 notify_connect_result (void *cls,
1305                        const struct GNUNET_SCHEDULER_TaskContext *tc)
1306 {
1307   struct ConnectContext *ctx = cls;
1308   struct GNUNET_TIME_Relative remaining;
1309
1310   ctx->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1311   if (ctx->hello_send_task != GNUNET_SCHEDULER_NO_TASK)
1312     {
1313       GNUNET_SCHEDULER_cancel(ctx->d1->sched, ctx->hello_send_task);
1314       ctx->hello_send_task = GNUNET_SCHEDULER_NO_TASK;
1315     }
1316
1317   if (ctx->connect_request_handle != NULL)
1318     {
1319       GNUNET_CORE_peer_request_connect_cancel (ctx->connect_request_handle);
1320       ctx->connect_request_handle = NULL;
1321     }
1322   if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
1323     {
1324       if (ctx->d2th != NULL)
1325         GNUNET_TRANSPORT_disconnect (ctx->d2th);
1326       ctx->d2th = NULL;
1327       if (ctx->d1core != NULL)
1328         GNUNET_CORE_disconnect (ctx->d1core);
1329 #if CONNECT_CORE2
1330       if (ctx->d2core != NULL)
1331         GNUNET_CORE_disconnect (ctx->d2core);
1332       ctx->d2core = NULL;
1333 #endif
1334       ctx->d1core = NULL;
1335
1336       GNUNET_free (ctx);
1337       return;
1338     }
1339
1340   remaining = GNUNET_TIME_absolute_get_remaining(ctx->timeout);
1341
1342   if (ctx->connected == GNUNET_YES)
1343     {
1344       if (ctx->cb != NULL)
1345         {
1346           ctx->cb (ctx->cb_cls, &ctx->d1->id, &ctx->d2->id, ctx->distance, ctx->d1->cfg,
1347                    ctx->d2->cfg, ctx->d1, ctx->d2, NULL);
1348         }
1349     }
1350   else if (remaining.value > 0)
1351     {
1352       if (ctx->d1core != NULL)
1353         {
1354           GNUNET_CORE_disconnect(ctx->d1core);
1355           ctx->d1core = NULL;
1356         }
1357 #if CONNECT_CORE2
1358       if (ctx->d2core != NULL)
1359         {
1360           GNUNET_CORE_disconnect(ctx->d2core);
1361           ctx->d2core = NULL;
1362         }
1363 #endif
1364
1365       if (ctx->d2th != NULL)
1366         {
1367           GNUNET_TRANSPORT_disconnect(ctx->d2th);
1368           ctx->d2th = NULL;
1369         }
1370       GNUNET_SCHEDULER_add_now(ctx->d1->sched, &reattempt_daemons_connect, ctx);
1371       return;
1372     }
1373   else
1374     {
1375       if (ctx->cb != NULL)
1376         {
1377           ctx->cb (ctx->cb_cls, &ctx->d1->id, &ctx->d2->id, 0, ctx->d1->cfg,
1378                    ctx->d2->cfg, ctx->d1, ctx->d2,
1379                    _("Peers failed to connect"));
1380         }
1381     }
1382
1383   GNUNET_TRANSPORT_disconnect (ctx->d2th);
1384   ctx->d2th = NULL;
1385   GNUNET_CORE_disconnect (ctx->d1core);
1386   ctx->d1core = NULL;
1387   GNUNET_free (ctx);
1388 }
1389
1390
1391 /**
1392  * Success, connection is up.  Signal client our success.
1393  *
1394  * @param cls our "struct ConnectContext"
1395  * @param peer identity of the peer that has connected
1396  * @param latency the round trip latency of the connection to this peer
1397  * @param distance distance the transport level distance to this peer
1398  *
1399  */
1400 static void
1401 connect_notify (void *cls, const struct GNUNET_PeerIdentity * peer, struct GNUNET_TIME_Relative latency,
1402                 uint32_t distance)
1403 {
1404   struct ConnectContext *ctx = cls;
1405
1406   if (memcmp(&ctx->d2->id, peer, sizeof(struct GNUNET_PeerIdentity)) == 0)
1407     {
1408       ctx->connected = GNUNET_YES;
1409       ctx->distance = distance;
1410       GNUNET_SCHEDULER_cancel(ctx->d1->sched, ctx->timeout_task);
1411       ctx->timeout_task = GNUNET_SCHEDULER_add_now (ctx->d1->sched,
1412                                                     &notify_connect_result,
1413                                                     ctx);
1414     }
1415
1416 }
1417
1418 #if CONNECT_CORE2
1419 /**
1420  * Success, connection is up.  Signal client our success.
1421  *
1422  * @param cls our "struct ConnectContext"
1423  * @param peer identity of the peer that has connected
1424  * @param latency the round trip latency of the connection to this peer
1425  * @param distance distance the transport level distance to this peer
1426  *
1427  */
1428 static void
1429 connect_notify_core2 (void *cls, const struct GNUNET_PeerIdentity * peer, struct GNUNET_TIME_Relative latency,
1430                 uint32_t distance)
1431 {
1432   struct ConnectContext *ctx = cls;
1433
1434   if (memcmp(&ctx->d2->id, peer, sizeof(struct GNUNET_PeerIdentity)) == 0)
1435     {
1436       ctx->connected = GNUNET_YES;
1437       ctx->distance = distance;
1438       GNUNET_SCHEDULER_cancel(ctx->d1->sched, ctx->timeout_task);
1439       ctx->timeout_task = GNUNET_SCHEDULER_add_now (ctx->d1->sched,
1440                                                     &notify_connect_result,
1441                                                     ctx);
1442     }
1443
1444 }
1445 #endif
1446
1447 /**
1448  * Task called once a core connect request has been transmitted.
1449  *
1450  * @param cls struct ConnectContext
1451  * @param tc context information (why was this task triggered now)
1452  */
1453 void core_connect_request_cont (void *cls,
1454                                 const struct
1455                                 GNUNET_SCHEDULER_TaskContext * tc)
1456 {
1457   struct ConnectContext *ctx = cls;
1458
1459   if (tc->reason == GNUNET_SCHEDULER_REASON_PREREQ_DONE)
1460     ctx->connect_request_handle = NULL;
1461   return;
1462 }
1463
1464 static void
1465 send_hello(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1466 {
1467   struct ConnectContext *ctx = cls;
1468   struct GNUNET_MessageHeader *hello;
1469   ctx->hello_send_task = GNUNET_SCHEDULER_NO_TASK;
1470   if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
1471     return;
1472   if ((ctx->d1->hello != NULL) && (NULL != GNUNET_HELLO_get_header(ctx->d1->hello)))
1473     {
1474       hello = GNUNET_HELLO_get_header(ctx->d1->hello);
1475       GNUNET_assert(hello != NULL);
1476       GNUNET_TRANSPORT_offer_hello (ctx->d2th, hello);
1477
1478       ctx->connect_request_handle = GNUNET_CORE_peer_request_connect (ctx->d1->sched,
1479                                                                       ctx->d2->cfg,
1480                                                                       GNUNET_TIME_relative_divide(ctx->relative_timeout,
1481                                                                                                   ctx->max_connect_attempts + 1),
1482                                                                       &ctx->d1->id,
1483                                                                       &core_connect_request_cont,
1484                                                                       ctx);
1485       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending connect request to core for peer %s\n", GNUNET_i2s(&ctx->d1->id));
1486       ctx->timeout_hello = GNUNET_TIME_relative_add(ctx->timeout_hello,
1487                                                     GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS,
1488                                                                                   500));
1489     }
1490   ctx->hello_send_task = GNUNET_SCHEDULER_add_delayed(ctx->d1->sched,
1491                                                       ctx->timeout_hello,
1492                                                       &send_hello, ctx);
1493 }
1494
1495 /**
1496  * Establish a connection between two GNUnet daemons.
1497  *
1498  * @param d1 handle for the first daemon
1499  * @param d2 handle for the second daemon
1500  * @param timeout how long is the connection attempt
1501  *        allowed to take?
1502  * @param max_connect_attempts how many times should we try to reconnect
1503  *        (within timeout)
1504  * @param cb function to call at the end
1505  * @param cb_cls closure for cb
1506  */
1507 void
1508 GNUNET_TESTING_daemons_connect (struct GNUNET_TESTING_Daemon *d1,
1509                                 struct GNUNET_TESTING_Daemon *d2,
1510                                 struct GNUNET_TIME_Relative timeout,
1511                                 unsigned int max_connect_attempts,
1512                                 GNUNET_TESTING_NotifyConnection cb,
1513                                 void *cb_cls)
1514 {
1515   struct ConnectContext *ctx;
1516
1517   if ((d1->running == GNUNET_NO) || (d2->running == GNUNET_NO))
1518     {
1519       if (NULL != cb)
1520         cb (cb_cls, &d1->id, &d2->id, 0, d1->cfg, d2->cfg, d1, d2,
1521             _("Peers are not fully running yet, can not connect!\n"));
1522       return;
1523     }
1524   ctx = GNUNET_malloc (sizeof (struct ConnectContext));
1525   ctx->d1 = d1;
1526   ctx->d2 = d2;
1527   ctx->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1528   ctx->timeout_hello = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500);
1529   ctx->relative_timeout = timeout;
1530   ctx->cb = cb;
1531   ctx->cb_cls = cb_cls;
1532   ctx->max_connect_attempts = max_connect_attempts;
1533   ctx->connected = GNUNET_NO;
1534 #if DEBUG_TESTING
1535   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1536               "Asked to connect peer %s to peer %s\n",
1537               d1->shortname, d2->shortname);
1538 #endif
1539
1540   ctx->d1core = GNUNET_CORE_connect (d1->sched,
1541                                      d1->cfg,
1542                                      timeout,
1543                                      ctx,
1544                                      NULL,
1545                                      &connect_notify, NULL, NULL,
1546                                      NULL, GNUNET_NO,
1547                                      NULL, GNUNET_NO, no_handlers);
1548   if (ctx->d1core == NULL)
1549     {
1550       GNUNET_free (ctx);
1551       if (NULL != cb)
1552         cb (cb_cls, &d1->id, &d2->id, 0, d1->cfg, d2->cfg, d1, d2,
1553             _("Failed to connect to core service of first peer!\n"));
1554       return;
1555     }
1556
1557 #if CONNECT_CORE2
1558   ctx->d2core = GNUNET_CORE_connect (d2->sched,
1559                                      d2->cfg,
1560                                      timeout,
1561                                      ctx,
1562                                      NULL,
1563                                      NULL, NULL, NULL,
1564                                      NULL, GNUNET_NO,
1565                                      NULL, GNUNET_NO, no_handlers);
1566   if (ctx->d2core == NULL)
1567     {
1568       GNUNET_free (ctx);
1569       if (NULL != cb)
1570         cb (cb_cls, &d1->id, &d2->id, 0, d1->cfg, d2->cfg, d1, d2,
1571             _("Failed to connect to core service of second peer!\n"));
1572       return;
1573     }
1574 #endif
1575
1576 #if DEBUG_TESTING > 2
1577   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1578               "Asked to connect peer %s to peer %s\n",
1579               d1->shortname, d2->shortname);
1580   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1581               "Connecting to transport service of peer %s\n", d2->shortname);
1582
1583 #endif
1584
1585   ctx->d2th = GNUNET_TRANSPORT_connect (d2->sched,
1586                                         d2->cfg,
1587                                         &d2->id,
1588                                         d2, NULL, NULL, NULL);
1589   if (ctx->d2th == NULL)
1590     {
1591       GNUNET_CORE_disconnect(ctx->d1core);
1592       GNUNET_free (ctx);
1593       if (NULL != cb)
1594         cb (cb_cls, &d1->id, &d2->id, 0, d1->cfg, d2->cfg, d1, d2,
1595             _("Failed to connect to transport service!\n"));
1596       return;
1597     }
1598
1599   ctx->timeout_task = GNUNET_SCHEDULER_add_delayed (d1->sched,
1600                                                     GNUNET_TIME_relative_divide(ctx->relative_timeout,
1601                                                     ctx->max_connect_attempts),
1602                                                     &notify_connect_result, ctx);
1603
1604   ctx->hello_send_task = GNUNET_SCHEDULER_add_now(ctx->d1->sched, &send_hello, ctx);
1605 }
1606
1607 static void
1608 reattempt_daemons_connect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1609 {
1610
1611   struct ConnectContext *ctx = cls;
1612   if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
1613     {
1614       return;
1615     }
1616 #if DEBUG_TESTING_RECONNECT
1617   GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "re-attempting connect of peer %s to peer %s\n",
1618               ctx->d1->shortname, ctx->d2->shortname);
1619 #endif
1620
1621   GNUNET_assert(ctx->d1core == NULL);
1622
1623   ctx->d1core = GNUNET_CORE_connect (ctx->d1->sched,
1624                                      ctx->d1->cfg,
1625                                      GNUNET_TIME_absolute_get_remaining(ctx->timeout),
1626                                      ctx,
1627                                      NULL,
1628                                      &connect_notify, NULL, NULL,
1629                                      NULL, GNUNET_NO,
1630                                      NULL, GNUNET_NO, no_handlers);
1631   if (ctx->d1core == NULL)
1632     {
1633       if (NULL != ctx->cb)
1634         ctx->cb (ctx->cb_cls, &ctx->d1->id, &ctx->d2->id, 0, ctx->d1->cfg, ctx->d2->cfg, ctx->d1, ctx->d2,
1635                  _("Failed to connect to core service of first peer!\n"));
1636       GNUNET_free (ctx);
1637       return;
1638     }
1639
1640   ctx->d2th = GNUNET_TRANSPORT_connect (ctx->d2->sched,
1641                                         ctx->d2->cfg,
1642                                         &ctx->d2->id,
1643                                         ctx->d2, NULL, NULL, NULL);
1644   if (ctx->d2th == NULL)
1645     {
1646       GNUNET_CORE_disconnect(ctx->d1core);
1647       GNUNET_free (ctx);
1648       if (NULL != ctx->cb)
1649         ctx->cb (ctx->cb_cls, &ctx->d1->id, &ctx->d2->id, 0, ctx->d1->cfg, ctx->d2->cfg, ctx->d1, ctx->d2,
1650             _("Failed to connect to transport service!\n"));
1651       return;
1652     }
1653
1654   ctx->timeout_task = GNUNET_SCHEDULER_add_delayed (ctx->d1->sched,
1655                                                     GNUNET_TIME_relative_divide(ctx->relative_timeout, ctx->max_connect_attempts),
1656                                                     &notify_connect_result, ctx);
1657
1658   ctx->hello_send_task = GNUNET_SCHEDULER_add_now(ctx->d1->sched, &send_hello, ctx);
1659 }
1660
1661 /* end of testing.c */