2 This file is part of GNUnet
3 (C) 2008, 2009 Christian Grothoff (and other contributing authors)
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.
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.
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.
22 * @file include/gnunet_testing_lib.h
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
32 #ifndef GNUNET_TESTING_LIB_H
33 #define GNUNET_TESTING_LIB_H
35 #include "gnunet_util_lib.h"
40 #if 0 /* keep Emacsens' auto-indent happy */
46 * Handle for a GNUnet daemon (technically a set of
47 * daemons; the handle is really for the master ARM
48 * daemon) started by the testing library.
50 struct GNUNET_TESTING_Daemon;
53 * Prototype of a function that will be called whenever
54 * a daemon was started by the testing library.
57 * @param id identifier for the daemon, NULL on error
58 * @param d handle for the daemon
59 * @param emsg error message (NULL on success)
61 typedef void (*GNUNET_TESTING_NotifyHostkeyCreated)(void *cls,
62 const struct GNUNET_PeerIdentity *id,
63 struct GNUNET_TESTING_Daemon *d,
67 * Prototype of a function that will be called whenever
68 * a daemon was started by the testing library.
71 * @param id identifier for the daemon, NULL on error
72 * @param cfg configuration used by this daemon
73 * @param d handle for the daemon
74 * @param emsg error message (NULL on success)
76 typedef void (*GNUNET_TESTING_NotifyDaemonRunning)(void *cls,
77 const struct GNUNET_PeerIdentity *id,
78 const struct GNUNET_CONFIGURATION_Handle *cfg,
79 struct GNUNET_TESTING_Daemon *d,
84 * Handle to an entire testbed of GNUnet peers.
86 struct GNUNET_TESTING_Testbed;
89 * Phases of starting GNUnet on a system.
91 enum GNUNET_TESTING_StartPhase
94 * Copy the configuration file to the target system.
99 * Configuration file has been copied, generate hostkey.
104 * Create the hostkey for the peer.
109 * Hostkey generated, wait for topology to be finished.
114 * Topology has been created, now start ARM.
119 * ARM has been started, check that it has properly daemonized and
120 * then try to connect to the CORE service (which should be
121 * auto-started by ARM).
126 * We're waiting for CORE to start.
131 * Core has notified us that we've established a connection to the service.
132 * The main FSM halts here and waits to be moved to UPDATE or CLEANUP.
137 * We've been asked to terminate the instance and are now waiting for
138 * the remote command to stop the gnunet-arm process and delete temporary
144 * We've received a configuration update and are currently waiting for
145 * the copy process for the update to complete. Once it is, we will
146 * return to "SP_START_DONE" (and rely on ARM to restart all affected
153 * Prototype of a function that will be called when a
154 * particular operation was completed the testing library.
157 * @param emsg NULL on success
159 typedef void (*GNUNET_TESTING_NotifyCompletion)(void *cls,
163 * Prototype of a function that will be called with the
164 * number of connections created for a particular topology.
167 * @param num_connections the number of connections created
169 typedef void (*GNUNET_TESTING_NotifyConnections)(void *cls,
170 unsigned int num_connections);
173 * Handle for a GNUnet daemon (technically a set of
174 * daemons; the handle is really for the master ARM
175 * daemon) started by the testing library.
177 struct GNUNET_TESTING_Daemon
182 struct GNUNET_SCHEDULER_Handle *sched;
187 struct GNUNET_CONFIGURATION_Handle *cfg;
190 * At what time to give up starting the peer
192 struct GNUNET_TIME_Absolute max_timeout;
195 * Host to run GNUnet on.
200 * Result of GNUNET_i2s of this peer,
206 * Username we are using.
211 * Name of the configuration file
216 * Callback to inform initiator that the peer's
217 * hostkey has been created.
219 GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback;
222 * Closure for hostkey creation callback.
227 * Function to call when the peer is running.
229 GNUNET_TESTING_NotifyDaemonRunning cb;
237 * Arguments from "daemon_stop" call.
239 GNUNET_TESTING_NotifyCompletion dead_cb;
242 * Closure for 'dead_cb'.
247 * Arguments from "daemon_stop" call.
249 GNUNET_TESTING_NotifyCompletion update_cb;
252 * Closure for 'update_cb'.
257 * Identity of this peer (once started).
259 struct GNUNET_PeerIdentity id;
262 * Flag to indicate that we've already been asked
263 * to terminate (but could not because some action
264 * was still pending).
269 * PID of the process that we started last.
274 * In which phase are we during the start of
277 enum GNUNET_TESTING_StartPhase phase;
280 * ID of the current task.
282 GNUNET_SCHEDULER_TaskIdentifier task;
285 * Handle to the server.
287 struct GNUNET_CORE_Handle *server;
290 * Handle to the transport service of this peer
292 struct GNUNET_TRANSPORT_Handle *th;
295 * HELLO message for this peer
297 struct GNUNET_HELLO_Message *hello;
300 * Handle to a pipe for reading the hostkey.
302 struct GNUNET_DISK_PipeHandle *pipe_stdout;
305 * Output from gnunet-peerinfo is read into this buffer.
307 char hostkeybuf[105];
310 * Current position in 'hostkeybuf' (for reading from gnunet-peerinfo)
312 unsigned int hostkeybufpos;
315 * Set to GNUNET_YES once the peer is up.
320 * Used to tell shutdown not to remove configuration for the peer
321 * (if it's going to be restarted later)
328 * Handle to a group of GNUnet peers.
330 struct GNUNET_TESTING_PeerGroup;
334 * Prototype of a function that will be called whenever
335 * two daemons are connected by the testing library.
338 * @param first peer id for first daemon
339 * @param second peer id for the second daemon
340 * @param first_cfg config for the first daemon
341 * @param second_cfg config for the second daemon
342 * @param first_daemon handle for the first daemon
343 * @param second_daemon handle for the second daemon
344 * @param emsg error message (NULL on success)
346 typedef void (*GNUNET_TESTING_NotifyConnection)(void *cls,
347 const struct GNUNET_PeerIdentity *first,
348 const struct GNUNET_PeerIdentity *second,
349 const struct GNUNET_CONFIGURATION_Handle *first_cfg,
350 const struct GNUNET_CONFIGURATION_Handle *second_cfg,
351 struct GNUNET_TESTING_Daemon *first_daemon,
352 struct GNUNET_TESTING_Daemon *second_daemon,
356 * Starts a GNUnet daemon. GNUnet must be installed on the target
357 * system and available in the PATH. The machine must furthermore be
358 * reachable via "ssh" (unless the hostname is "NULL") without the
359 * need to enter a password.
361 * @param sched scheduler to use
362 * @param cfg configuration to use
363 * @param timeout how long to wait starting up peers
364 * @param hostname name of the machine where to run GNUnet
365 * (use NULL for localhost).
366 * @param hostkey_callback function to call once the hostkey has been
367 * generated for this peer, but it hasn't yet been started
368 * (NULL to start immediately, otherwise waits on GNUNET_TESTING_daemon_continue_start)
369 * @param hostkey_cls closure for hostkey callback
370 * @param cb function to call with the result
371 * @param cb_cls closure for cb
372 * @return handle to the daemon (actual start will be completed asynchronously)
374 struct GNUNET_TESTING_Daemon *
375 GNUNET_TESTING_daemon_start (struct GNUNET_SCHEDULER_Handle *sched,
376 const struct GNUNET_CONFIGURATION_Handle *cfg,
377 struct GNUNET_TIME_Relative timeout,
378 const char *hostname,
379 GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback,
381 GNUNET_TESTING_NotifyDaemonRunning cb,
385 * Continues GNUnet daemon startup when user wanted to be notified
386 * once a hostkey was generated (for creating friends files, blacklists,
389 * @param daemon the daemon to finish starting
392 GNUNET_TESTING_daemon_continue_startup(struct GNUNET_TESTING_Daemon *daemon);
395 * Restart (stop and start) a GNUnet daemon.
397 * @param d the daemon that should be restarted
398 * @param cb function called once the daemon is (re)started
399 * @param cb_cls closure for cb
402 GNUNET_TESTING_daemon_restart (struct GNUNET_TESTING_Daemon *d,
403 GNUNET_TESTING_NotifyDaemonRunning cb, void *cb_cls);
406 * Start a peer that has previously been stopped using the daemon_stop
407 * call (and files weren't deleted and the allow restart flag)
409 * @param daemon the daemon to start (has been previously stopped)
410 * @param timeout how long to wait for restart
411 * @param cb the callback for notification when the peer is running
412 * @param cb_cls closure for the callback
415 GNUNET_TESTING_daemon_start_stopped (struct GNUNET_TESTING_Daemon *daemon,
416 struct GNUNET_TIME_Relative timeout,
417 GNUNET_TESTING_NotifyDaemonRunning cb,
421 * Get a certain testing daemon handle.
423 * @param pg handle to the set of running peers
424 * @param position the number of the peer to return
426 struct GNUNET_TESTING_Daemon *
427 GNUNET_TESTING_daemon_get (struct GNUNET_TESTING_PeerGroup *pg,
428 unsigned int position);
432 * Stops a GNUnet daemon.
434 * @param d the daemon that should be stopped
435 * @param timeout how long to wait for process for shutdown to complete
436 * @param cb function called once the daemon was stopped
437 * @param cb_cls closure for cb
438 * @param delete_files GNUNET_YES to remove files, GNUNET_NO
439 * to leave them (i.e. for restarting at a later time,
440 * or logfile inspection once finished)
441 * @param allow_restart GNUNET_YES to restart peer later (using this API)
442 * GNUNET_NO to kill off and clean up for good
445 GNUNET_TESTING_daemon_stop (struct GNUNET_TESTING_Daemon *d,
446 struct GNUNET_TIME_Relative timeout,
447 GNUNET_TESTING_NotifyCompletion cb, void *cb_cls,
448 int delete_files, int allow_restart);
452 * Changes the configuration of a GNUnet daemon.
454 * @param d the daemon that should be modified
455 * @param cfg the new configuration for the daemon
456 * @param cb function called once the configuration was changed
457 * @param cb_cls closure for cb
459 void GNUNET_TESTING_daemon_reconfigure (struct GNUNET_TESTING_Daemon *d,
460 struct GNUNET_CONFIGURATION_Handle *cfg,
461 GNUNET_TESTING_NotifyCompletion cb,
466 * Establish a connection between two GNUnet daemons.
468 * @param d1 handle for the first daemon
469 * @param d2 handle for the second daemon
470 * @param timeout how long is the connection attempt
472 * @param max_connect_attempts how many times should we try to reconnect
474 * @param cb function to call at the end
475 * @param cb_cls closure for cb
477 void GNUNET_TESTING_daemons_connect (struct GNUNET_TESTING_Daemon *d1,
478 struct GNUNET_TESTING_Daemon *d2,
479 struct GNUNET_TIME_Relative timeout,
480 unsigned int max_connect_attempts,
481 GNUNET_TESTING_NotifyConnection cb,
488 * Start count gnunetd processes with the same set of transports and
489 * applications. The port numbers (any option called "PORT") will be
490 * adjusted to ensure that no two peers running on the same system
491 * have the same port(s) in their respective configurations.
493 * @param sched scheduler to use
494 * @param cfg configuration template to use
495 * @param total number of daemons to start
496 * @param timeout total time allowed for peers to start
497 * @param hostkey_callback function to call on each peers hostkey generation
498 * if NULL, peers will be started by this call, if non-null,
499 * GNUNET_TESTING_daemons_continue_startup must be called after
500 * successful hostkey generation
501 * @param hostkey_cls closure for hostkey callback
502 * @param cb function to call on each daemon that was started
503 * @param cb_cls closure for cb
504 * @param connect_callback function to call each time two hosts are connected
505 * @param connect_callback_cls closure for connect_callback
506 * @param hostnames space-separated list of hostnames to use; can be NULL (to run
507 * everything on localhost).
508 * @return NULL on error, otherwise handle to control peer group
510 struct GNUNET_TESTING_PeerGroup *
511 GNUNET_TESTING_daemons_start (struct GNUNET_SCHEDULER_Handle *sched,
512 const struct GNUNET_CONFIGURATION_Handle *cfg,
514 struct GNUNET_TIME_Relative timeout,
515 GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback,
517 GNUNET_TESTING_NotifyDaemonRunning cb,
519 GNUNET_TESTING_NotifyConnection
520 connect_callback, void *connect_callback_cls,
521 const char *hostnames);
524 * Function which continues a peer group starting up
525 * after successfully generating hostkeys for each peer.
527 * @param pg the peer group to continue starting
530 GNUNET_TESTING_daemons_continue_startup(struct GNUNET_TESTING_PeerGroup *pg);
533 * Restart all peers in the given group.
535 * @param pg the handle to the peer group
536 * @param callback function to call on completion (or failure)
537 * @param callback_cls closure for the callback function
540 GNUNET_TESTING_daemons_restart (struct GNUNET_TESTING_PeerGroup *pg,
541 GNUNET_TESTING_NotifyCompletion callback,
546 * Shutdown all peers started in the given group.
548 * @param pg handle to the peer group
549 * @param timeout how long to wait for shutdown
552 GNUNET_TESTING_daemons_stop (struct GNUNET_TESTING_PeerGroup *pg,
553 struct GNUNET_TIME_Relative timeout);
557 * Simulate churn by stopping some peers (and possibly
558 * re-starting others if churn is called multiple times). This
559 * function can only be used to create leave-join churn (peers "never"
560 * leave for good). First "voff" random peers that are currently
561 * online will be taken offline; then "von" random peers that are then
562 * offline will be put back online. No notifications will be
563 * generated for any of these operations except for the callback upon
564 * completion. Note that the implementation is at liberty to keep
565 * the ARM service itself (but none of the other services or daemons)
566 * running even though the "peer" is being varied offline.
568 * @param pg handle for the peer group
569 * @param voff number of peers that should go offline
570 * @param von number of peers that should come back online;
571 * must be zero on first call (since "testbed_start"
572 * always starts all of the peers)
573 * @param timeout how long to wait for operations to finish before
575 * @param cb function to call at the end
576 * @param cb_cls closure for cb
579 GNUNET_TESTING_daemons_churn (struct GNUNET_TESTING_PeerGroup *pg,
582 struct GNUNET_TIME_Relative timeout,
583 GNUNET_TESTING_NotifyCompletion cb,
588 * Topologies supported for testbeds.
590 enum GNUNET_TESTING_Topology
593 * A clique (everyone connected to everyone else).
595 GNUNET_TESTING_TOPOLOGY_CLIQUE,
598 * Small-world network (2d torus plus random links).
600 GNUNET_TESTING_TOPOLOGY_SMALL_WORLD,
603 * Small-world network (ring plus random links).
605 GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING,
610 GNUNET_TESTING_TOPOLOGY_RING,
615 GNUNET_TESTING_TOPOLOGY_2D_TORUS,
620 GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI,
623 * Certain percentage of peers are unable to communicate directly
624 * replicating NAT conditions
626 GNUNET_TESTING_TOPOLOGY_INTERNAT,
629 * Scale free topology.
631 GNUNET_TESTING_TOPOLOGY_SCALE_FREE,
634 * All peers are disconnected.
636 GNUNET_TESTING_TOPOLOGY_NONE
640 * Options for connecting a topology.
642 enum GNUNET_TESTING_TopologyOption
645 * Try to connect all peers specified in the topology.
647 GNUNET_TESTING_TOPOLOGY_OPTION_ALL,
650 * Choose a random subset of connections to create.
652 GNUNET_TESTING_TOPOLOGY_OPTION_RANDOM,
655 * Create at least X connections for each peer.
657 GNUNET_TESTING_TOPOLOGY_OPTION_MINIMUM,
660 * Using a depth first search, create one connection
661 * per peer. If any are missed (graph disconnected)
662 * start over at those peers until all have at least one
665 GNUNET_TESTING_TOPOLOGY_OPTION_DFS,
668 * No options specified.
670 GNUNET_TESTING_TOPOLOGY_OPTION_NONE
675 * Get a topology from a string input.
677 * @param topology where to write the retrieved topology
678 * @param topology_string The string to attempt to
679 * get a configuration value from
680 * @return GNUNET_YES if topology string matched a
681 * known topology, GNUNET_NO if not
684 GNUNET_TESTING_topology_get(enum GNUNET_TESTING_Topology *topology, char * topology_string);
687 * Get connect topology option from string input.
689 * @param topology where to write the retrieved topology
690 * @param topology_string The string to attempt to
691 * get a configuration value from
692 * @return GNUNET_YES if topology string matched a
693 * known topology, GNUNET_NO if not
696 GNUNET_TESTING_topology_option_get(enum GNUNET_TESTING_TopologyOption *topology, char * topology_string);
700 * Takes a peer group and creates a topology based on the
701 * one specified. Creates a topology means generates friend
702 * files for the peers so they can only connect to those allowed
703 * by the topology. This will only have an effect once peers
704 * are started if the FRIENDS_ONLY option is set in the base
705 * config. Also takes an optional restrict topology which
706 * disallows direct TCP connections UNLESS they are specified in
707 * the restricted topology.
709 * @param pg the peer group struct representing the running peers
710 * @param topology which topology to connect the peers in
711 * @param restrict_topology allow only direct TCP connections in this topology
712 * @param restrict_transports space delimited list of transports to blacklist
713 * to create restricted topology
715 * @return the maximum number of connections were all allowed peers
716 * connected to each other
719 GNUNET_TESTING_create_topology (struct GNUNET_TESTING_PeerGroup *pg,
720 enum GNUNET_TESTING_Topology topology,
721 enum GNUNET_TESTING_Topology restrict_topology,
722 char *restrict_transports);
725 * There are many ways to connect peers that are supported by this function.
726 * To connect peers in the same topology that was created via the
727 * GNUNET_TESTING_create_topology, the topology variable must be set to
728 * GNUNET_TESTING_TOPOLOGY_NONE. If the topology variable is specified,
729 * a new instance of that topology will be generated and attempted to be
730 * connected. This could result in some connections being impossible,
731 * because some topologies are non-deterministic.
733 * @param pg the peer group struct representing the running peers
734 * @param topology which topology to connect the peers in
735 * @param options options for connecting the topology
736 * @param option_modifier modifier for options that take a parameter
737 * @return the number of connections that will be attempted, GNUNET_SYSERR on error
740 GNUNET_TESTING_connect_topology (struct GNUNET_TESTING_PeerGroup *pg,
741 enum GNUNET_TESTING_Topology topology,
742 enum GNUNET_TESTING_TopologyOption options,
743 double option_modifier);
746 * Start or stop an individual peer from the given group.
748 * @param pg handle to the peer group
749 * @param offset which peer to start or stop
750 * @param desired_status GNUNET_YES to have it running, GNUNET_NO to stop it
751 * @param timeout how long to wait for shutdown
752 * @param cb function to call at the end
753 * @param cb_cls closure for cb
756 GNUNET_TESTING_daemons_vary (struct GNUNET_TESTING_PeerGroup *pg,
759 struct GNUNET_TIME_Relative timeout,
760 GNUNET_TESTING_NotifyCompletion cb,
765 * Start "count" GNUnet daemons with a particular topology.
767 * @param sched scheduler to use
768 * @param cfg configuration template to use
769 * @param count number of peers the testbed should have
770 * @param topology desired topology (enforced via F2F)
771 * @param cb function to call on each daemon that was started
772 * @param cb_cls closure for cb
773 * @param hostname where to run the peers; can be NULL (to run
774 * everything on localhost). Additional
775 * hosts can be specified using a NULL-terminated list of
776 * varargs, hosts will then be used round-robin from that
778 * @return handle to control the testbed
780 struct GNUNET_TESTING_Testbed *
781 GNUNET_TESTING_testbed_start (struct GNUNET_SCHEDULER_Handle *sched,
782 const struct GNUNET_CONFIGURATION_Handle *cfg,
784 enum GNUNET_TESTING_Topology topology,
785 GNUNET_TESTING_NotifyDaemonRunning cb,
787 const char *hostname,
792 * Stop all of the daemons started with the start function.
794 * @param tb handle for the testbed
795 * @param cb function to call when done
796 * @param cb_cls closure for cb
799 GNUNET_TESTING_testbed_stop (struct GNUNET_TESTING_Testbed *tb,
800 GNUNET_TESTING_NotifyCompletion cb,
805 * Simulate churn in the testbed by stopping some peers (and possibly
806 * re-starting others if churn is called multiple times). This
807 * function can only be used to create leave-join churn (peers "never"
808 * leave for good). First "voff" random peers that are currently
809 * online will be taken offline; then "von" random peers that are then
810 * offline will be put back online. No notifications will be
811 * generated for any of these operations except for the callback upon
812 * completion. Note that the implementation is at liberty to keep
813 * the ARM service itself (but none of the other services or daemons)
814 * running even though the "peer" is being varied offline.
816 * @param tb handle for the testbed
817 * @param voff number of peers that should go offline
818 * @param von number of peers that should come back online;
819 * must be zero on first call (since "testbed_start"
820 * always starts all of the peers)
821 * @param cb function to call at the end
822 * @param cb_cls closure for cb
825 GNUNET_TESTING_testbed_churn (struct GNUNET_TESTING_Testbed *tb,
828 GNUNET_TESTING_NotifyCompletion cb,
832 #if 0 /* keep Emacsens' auto-indent happy */