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 3, 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"
36 #include "gnunet_statistics_service.h"
41 #if 0 /* keep Emacsens' auto-indent happy */
46 #define HOSTKEYFILESIZE 914
49 * Handle for a GNUnet daemon (technically a set of
50 * daemons; the handle is really for the master ARM
51 * daemon) started by the testing library.
53 struct GNUNET_TESTING_Daemon;
56 * Linked list of hostnames and ports to use for starting daemons.
58 struct GNUNET_TESTING_Host
61 * Pointer to next item in the list.
63 struct GNUNET_TESTING_Host *next;
66 * Hostname to connect to.
71 * Username to use when connecting (may be null).
76 * Port to use for SSH connection (used for ssh
77 * connection forwarding, 0 to let ssh decide)
83 * Prototype of a function that will be called whenever
84 * a daemon was started by the testing library.
87 * @param id identifier for the daemon, NULL on error
88 * @param d handle for the daemon
89 * @param emsg error message (NULL on success)
91 typedef void (*GNUNET_TESTING_NotifyHostkeyCreated)(void *cls,
92 const struct GNUNET_PeerIdentity *id,
93 struct GNUNET_TESTING_Daemon *d,
97 * Prototype of a function that will be called whenever
98 * a daemon was started by the testing library.
101 * @param id identifier for the daemon, NULL on error
102 * @param cfg configuration used by this daemon
103 * @param d handle for the daemon
104 * @param emsg error message (NULL on success)
106 typedef void (*GNUNET_TESTING_NotifyDaemonRunning)(void *cls,
107 const struct GNUNET_PeerIdentity *id,
108 const struct GNUNET_CONFIGURATION_Handle *cfg,
109 struct GNUNET_TESTING_Daemon *d,
114 * Handle to an entire testbed of GNUnet peers.
116 struct GNUNET_TESTING_Testbed;
119 * Phases of starting GNUnet on a system.
121 enum GNUNET_TESTING_StartPhase
124 * Copy the configuration file to the target system.
129 * Configuration file has been copied, generate hostkey.
134 * Create the hostkey for the peer.
139 * Hostkey generated, wait for topology to be finished.
144 * Topology has been created, now start ARM.
149 * ARM has been started, check that it has properly daemonized and
150 * then try to connect to the CORE service (which should be
151 * auto-started by ARM).
156 * We're waiting for CORE to start.
161 * CORE is up, now make sure we get the HELLO for this peer.
166 * Core has notified us that we've established a connection to the service.
167 * The main FSM halts here and waits to be moved to UPDATE or CLEANUP.
172 * We've been asked to terminate the instance and are now waiting for
173 * the remote command to stop the gnunet-arm process and delete temporary
179 * We've received a configuration update and are currently waiting for
180 * the copy process for the update to complete. Once it is, we will
181 * return to "SP_START_DONE" (and rely on ARM to restart all affected
188 * Prototype of a function that will be called when a
189 * particular operation was completed the testing library.
192 * @param emsg NULL on success
194 typedef void (*GNUNET_TESTING_NotifyCompletion)(void *cls,
198 * Prototype of a function that will be called with the
199 * number of connections created for a particular topology.
202 * @param num_connections the number of connections created
204 typedef void (*GNUNET_TESTING_NotifyConnections)(void *cls,
205 unsigned int num_connections);
208 * Handle for a GNUnet daemon (technically a set of
209 * daemons; the handle is really for the master ARM
210 * daemon) started by the testing library.
212 struct GNUNET_TESTING_Daemon
217 struct GNUNET_CONFIGURATION_Handle *cfg;
220 * At what time to give up starting the peer
222 struct GNUNET_TIME_Absolute max_timeout;
225 * Host to run GNUnet on.
230 * Port to use for ssh, NULL to let system choose default.
235 * Result of GNUNET_i2s of this peer,
241 * Username we are using.
246 * Name of the configuration file
251 * Callback to inform initiator that the peer's
252 * hostkey has been created.
254 GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback;
257 * Closure for hostkey creation callback.
262 * Function to call when the peer is running.
264 GNUNET_TESTING_NotifyDaemonRunning cb;
272 * Arguments from "daemon_stop" call.
274 GNUNET_TESTING_NotifyCompletion dead_cb;
277 * Closure for 'dead_cb'.
282 * Arguments from "daemon_stop" call.
284 GNUNET_TESTING_NotifyCompletion update_cb;
287 * Closure for 'update_cb'.
292 * Identity of this peer (once started).
294 struct GNUNET_PeerIdentity id;
297 * Flag to indicate that we've already been asked
298 * to terminate (but could not because some action
299 * was still pending).
304 * PID of the process that we started last.
306 struct GNUNET_OS_Process *proc;
309 * In which phase are we during the start of
312 enum GNUNET_TESTING_StartPhase phase;
315 * ID of the current task.
317 GNUNET_SCHEDULER_TaskIdentifier task;
320 * Handle to the server.
322 struct GNUNET_CORE_Handle *server;
325 * Handle to the transport service of this peer
327 struct GNUNET_TRANSPORT_Handle *th;
330 * HELLO message for this peer
332 struct GNUNET_HELLO_Message *hello;
335 * Handle to a pipe for reading the hostkey.
337 struct GNUNET_DISK_PipeHandle *pipe_stdout;
340 * Output from gnunet-peerinfo is read into this buffer.
342 char hostkeybuf[105];
345 * Current position in 'hostkeybuf' (for reading from gnunet-peerinfo)
347 unsigned int hostkeybufpos;
350 * Set to GNUNET_YES once the peer is up.
355 * Used to tell shutdown not to remove configuration for the peer
356 * (if it's going to be restarted later)
363 * Handle to a group of GNUnet peers.
365 struct GNUNET_TESTING_PeerGroup;
369 * Prototype of a function that will be called whenever
370 * two daemons are connected by the testing library.
373 * @param first peer id for first daemon
374 * @param second peer id for the second daemon
375 * @param distance distance between the connected peers
376 * @param first_cfg config for the first daemon
377 * @param second_cfg config for the second daemon
378 * @param first_daemon handle for the first daemon
379 * @param second_daemon handle for the second daemon
380 * @param emsg error message (NULL on success)
382 typedef void (*GNUNET_TESTING_NotifyConnection)(void *cls,
383 const struct GNUNET_PeerIdentity *first,
384 const struct GNUNET_PeerIdentity *second,
386 const struct GNUNET_CONFIGURATION_Handle *first_cfg,
387 const struct GNUNET_CONFIGURATION_Handle *second_cfg,
388 struct GNUNET_TESTING_Daemon *first_daemon,
389 struct GNUNET_TESTING_Daemon *second_daemon,
393 * Prototype of a callback function indicating that two peers
394 * are currently connected.
397 * @param first peer id for first daemon
398 * @param second peer id for the second daemon
399 * @param distance distance between the connected peers
400 * @param emsg error message (NULL on success)
402 typedef void (*GNUNET_TESTING_NotifyTopology)(void *cls,
403 const struct GNUNET_PeerIdentity *first,
404 const struct GNUNET_PeerIdentity *second,
408 * Starts a GNUnet daemon. GNUnet must be installed on the target
409 * system and available in the PATH. The machine must furthermore be
410 * reachable via "ssh" (unless the hostname is "NULL") without the
411 * need to enter a password.
413 * @param cfg configuration to use
414 * @param timeout how long to wait starting up peers
415 * @param hostname name of the machine where to run GNUnet
416 * (use NULL for localhost).
417 * @param ssh_username ssh username to use when connecting to hostname
418 * @param sshport port to pass to ssh process when connecting to hostname
419 * @param hostkey pointer to a hostkey to be written to disk (instead of being generated)
420 * @param hostkey_callback function to call once the hostkey has been
421 * generated for this peer, but it hasn't yet been started
422 * (NULL to start immediately, otherwise waits on GNUNET_TESTING_daemon_continue_start)
423 * @param hostkey_cls closure for hostkey callback
424 * @param cb function to call once peer is up, or failed to start
425 * @param cb_cls closure for cb
426 * @return handle to the daemon (actual start will be completed asynchronously)
428 struct GNUNET_TESTING_Daemon *
429 GNUNET_TESTING_daemon_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
430 struct GNUNET_TIME_Relative timeout,
431 const char *hostname,
432 const char *ssh_username,
435 GNUNET_TESTING_NotifyHostkeyCreated
436 hostkey_callback, void *hostkey_cls,
437 GNUNET_TESTING_NotifyDaemonRunning cb,
441 * Continues GNUnet daemon startup when user wanted to be notified
442 * once a hostkey was generated (for creating friends files, blacklists,
445 * @param daemon the daemon to finish starting
448 GNUNET_TESTING_daemon_continue_startup(struct GNUNET_TESTING_Daemon *daemon);
451 * Check whether the given daemon is running.
453 * @param daemon the daemon to check
455 * @return GNUNET_YES if the daemon is up, GNUNET_NO if the
456 * daemon is down, GNUNET_SYSERR on error.
459 GNUNET_TESTING_daemon_running (struct GNUNET_TESTING_Daemon *daemon);
462 * Restart (stop and start) a GNUnet daemon.
464 * @param d the daemon that should be restarted
465 * @param cb function called once the daemon is (re)started
466 * @param cb_cls closure for cb
469 GNUNET_TESTING_daemon_restart (struct GNUNET_TESTING_Daemon *d,
470 GNUNET_TESTING_NotifyDaemonRunning cb, void *cb_cls);
473 * Start a peer that has previously been stopped using the daemon_stop
474 * call (and files weren't deleted and the allow restart flag)
476 * @param daemon the daemon to start (has been previously stopped)
477 * @param timeout how long to wait for restart
478 * @param cb the callback for notification when the peer is running
479 * @param cb_cls closure for the callback
482 GNUNET_TESTING_daemon_start_stopped (struct GNUNET_TESTING_Daemon *daemon,
483 struct GNUNET_TIME_Relative timeout,
484 GNUNET_TESTING_NotifyDaemonRunning cb,
488 * Get a certain testing daemon handle.
490 * @param pg handle to the set of running peers
491 * @param position the number of the peer to return
493 struct GNUNET_TESTING_Daemon *
494 GNUNET_TESTING_daemon_get (struct GNUNET_TESTING_PeerGroup *pg,
495 unsigned int position);
498 * Get a daemon by peer identity, so callers can
499 * retrieve the daemon without knowing it's offset.
501 * @param pg the peer group to retrieve the daemon from
502 * @param peer_id the peer identity of the daemon to retrieve
504 * @return the daemon on success, or NULL if no such peer identity is found
506 struct GNUNET_TESTING_Daemon *
507 GNUNET_TESTING_daemon_get_by_id (struct GNUNET_TESTING_PeerGroup *pg,
508 struct GNUNET_PeerIdentity *peer_id);
511 * Stops a GNUnet daemon.
513 * @param d the daemon that should be stopped
514 * @param timeout how long to wait for process for shutdown to complete
515 * @param cb function called once the daemon was stopped
516 * @param cb_cls closure for cb
517 * @param delete_files GNUNET_YES to remove files, GNUNET_NO
518 * to leave them (i.e. for restarting at a later time,
519 * or logfile inspection once finished)
520 * @param allow_restart GNUNET_YES to restart peer later (using this API)
521 * GNUNET_NO to kill off and clean up for good
524 GNUNET_TESTING_daemon_stop (struct GNUNET_TESTING_Daemon *d,
525 struct GNUNET_TIME_Relative timeout,
526 GNUNET_TESTING_NotifyCompletion cb, void *cb_cls,
527 int delete_files, int allow_restart);
531 * Changes the configuration of a GNUnet daemon.
533 * @param d the daemon that should be modified
534 * @param cfg the new configuration for the daemon
535 * @param cb function called once the configuration was changed
536 * @param cb_cls closure for cb
538 void GNUNET_TESTING_daemon_reconfigure (struct GNUNET_TESTING_Daemon *d,
539 struct GNUNET_CONFIGURATION_Handle *cfg,
540 GNUNET_TESTING_NotifyCompletion cb,
545 * Establish a connection between two GNUnet daemons.
547 * @param d1 handle for the first daemon
548 * @param d2 handle for the second daemon
549 * @param timeout how long is the connection attempt
551 * @param max_connect_attempts how many times should we try to reconnect
553 * @param send_hello GNUNET_YES to send the HELLO, GNUNET_NO to assume
554 * the HELLO has already been exchanged
555 * @param cb function to call at the end
556 * @param cb_cls closure for cb
559 GNUNET_TESTING_daemons_connect (struct GNUNET_TESTING_Daemon *d1,
560 struct GNUNET_TESTING_Daemon *d2,
561 struct GNUNET_TIME_Relative timeout,
562 unsigned int max_connect_attempts,
564 GNUNET_TESTING_NotifyConnection cb,
571 * Start count gnunet instances with the same set of transports and
572 * applications. The port numbers (any option called "PORT") will be
573 * adjusted to ensure that no two peers running on the same system
574 * have the same port(s) in their respective configurations.
576 * @param cfg configuration template to use
577 * @param total number of daemons to start
578 * @param max_concurrent_connections for testing, how many peers can
579 * we connect to simultaneously
580 * @param max_concurrent_ssh when starting with ssh, how many ssh
581 * connections will we allow at once (based on remote hosts allowed!)
582 * @param timeout total time allowed for peers to start
583 * @param hostkey_callback function to call on each peers hostkey generation
584 * if NULL, peers will be started by this call, if non-null,
585 * GNUNET_TESTING_daemons_continue_startup must be called after
586 * successful hostkey generation
587 * @param hostkey_cls closure for hostkey callback
588 * @param cb function to call on each daemon that was started
589 * @param cb_cls closure for cb
590 * @param connect_callback function to call each time two hosts are connected
591 * @param connect_callback_cls closure for connect_callback
592 * @param hostnames linked list of host structs to use to start peers on
593 * (NULL to run on localhost only)
595 * @return NULL on error, otherwise handle to control peer group
597 struct GNUNET_TESTING_PeerGroup *
598 GNUNET_TESTING_daemons_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
600 unsigned int max_concurrent_connections,
601 unsigned int max_concurrent_ssh,
602 struct GNUNET_TIME_Relative timeout,
603 GNUNET_TESTING_NotifyHostkeyCreated
604 hostkey_callback, void *hostkey_cls,
605 GNUNET_TESTING_NotifyDaemonRunning cb,
607 GNUNET_TESTING_NotifyConnection
608 connect_callback, void *connect_callback_cls,
609 const struct GNUNET_TESTING_Host *hostnames);
612 * Function which continues a peer group starting up
613 * after successfully generating hostkeys for each peer.
615 * @param pg the peer group to continue starting
618 GNUNET_TESTING_daemons_continue_startup(struct GNUNET_TESTING_PeerGroup *pg);
621 * Restart all peers in the given group.
623 * @param pg the handle to the peer group
624 * @param callback function to call on completion (or failure)
625 * @param callback_cls closure for the callback function
628 GNUNET_TESTING_daemons_restart (struct GNUNET_TESTING_PeerGroup *pg,
629 GNUNET_TESTING_NotifyCompletion callback,
634 * Shutdown all peers started in the given group.
636 * @param pg handle to the peer group
637 * @param timeout how long to wait for shutdown
638 * @param cb callback to notify upon success or failure
639 * @param cb_cls closure for cb
642 GNUNET_TESTING_daemons_stop (struct GNUNET_TESTING_PeerGroup *pg,
643 struct GNUNET_TIME_Relative timeout,
644 GNUNET_TESTING_NotifyCompletion cb,
649 * Count the number of running peers.
651 * @param pg handle for the peer group
653 * @return the number of currently running peers in the peer group
656 GNUNET_TESTING_daemons_running (struct GNUNET_TESTING_PeerGroup *pg);
659 * Simulate churn by stopping some peers (and possibly
660 * re-starting others if churn is called multiple times). This
661 * function can only be used to create leave-join churn (peers "never"
662 * leave for good). First "voff" random peers that are currently
663 * online will be taken offline; then "von" random peers that are then
664 * offline will be put back online. No notifications will be
665 * generated for any of these operations except for the callback upon
666 * completion. Note that the implementation is at liberty to keep
667 * the ARM service itself (but none of the other services or daemons)
668 * running even though the "peer" is being varied offline.
670 * @param pg handle for the peer group
671 * @param voff number of peers that should go offline
672 * @param von number of peers that should come back online;
673 * must be zero on first call (since "testbed_start"
674 * always starts all of the peers)
675 * @param timeout how long to wait for operations to finish before
677 * @param cb function to call at the end
678 * @param cb_cls closure for cb
681 GNUNET_TESTING_daemons_churn (struct GNUNET_TESTING_PeerGroup *pg,
684 struct GNUNET_TIME_Relative timeout,
685 GNUNET_TESTING_NotifyCompletion cb,
689 * Callback function to process statistic values.
692 * @param peer the peer the statistics belong to
693 * @param subsystem name of subsystem that created the statistic
694 * @param name the name of the datum
695 * @param value the current value
696 * @param is_persistent GNUNET_YES if the value is persistent, GNUNET_NO if not
697 * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
699 typedef int (*GNUNET_TESTING_STATISTICS_Iterator) (void *cls,
700 const struct GNUNET_PeerIdentity *peer,
701 const char *subsystem,
707 * Iterate over all (running) peers in the peer group, retrieve
708 * all statistics from each.
711 GNUNET_TESTING_get_statistics (struct GNUNET_TESTING_PeerGroup *pg,
712 GNUNET_STATISTICS_Callback cont,
713 GNUNET_TESTING_STATISTICS_Iterator proc, void *cls);
716 * Topologies supported for testbeds.
718 enum GNUNET_TESTING_Topology
721 * A clique (everyone connected to everyone else).
723 GNUNET_TESTING_TOPOLOGY_CLIQUE,
726 * Small-world network (2d torus plus random links).
728 GNUNET_TESTING_TOPOLOGY_SMALL_WORLD,
731 * Small-world network (ring plus random links).
733 GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING,
738 GNUNET_TESTING_TOPOLOGY_RING,
743 GNUNET_TESTING_TOPOLOGY_2D_TORUS,
748 GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI,
751 * Certain percentage of peers are unable to communicate directly
752 * replicating NAT conditions
754 GNUNET_TESTING_TOPOLOGY_INTERNAT,
757 * Scale free topology.
759 GNUNET_TESTING_TOPOLOGY_SCALE_FREE,
762 * Straight line topology.
764 GNUNET_TESTING_TOPOLOGY_LINE,
767 * All peers are disconnected.
769 GNUNET_TESTING_TOPOLOGY_NONE,
772 * Read a topology from a given file.
774 GNUNET_TESTING_TOPOLOGY_FROM_FILE
778 * Options for connecting a topology.
780 enum GNUNET_TESTING_TopologyOption
783 * Try to connect all peers specified in the topology.
785 GNUNET_TESTING_TOPOLOGY_OPTION_ALL,
788 * Choose a random subset of connections to create.
790 GNUNET_TESTING_TOPOLOGY_OPTION_RANDOM,
793 * Create at least X connections for each peer.
795 GNUNET_TESTING_TOPOLOGY_OPTION_MINIMUM,
798 * Using a depth first search, create one connection
799 * per peer. If any are missed (graph disconnected)
800 * start over at those peers until all have at least one
803 GNUNET_TESTING_TOPOLOGY_OPTION_DFS,
806 * Find the N closest peers to each allowed peer in the
807 * topology and make sure a connection to those peers
808 * exists in the connect topology.
810 GNUNET_TESTING_TOPOLOGY_OPTION_ADD_CLOSEST,
813 * No options specified.
815 GNUNET_TESTING_TOPOLOGY_OPTION_NONE
820 * Get a topology from a string input.
822 * @param topology where to write the retrieved topology
823 * @param topology_string The string to attempt to
824 * get a configuration value from
825 * @return GNUNET_YES if topology string matched a
826 * known topology, GNUNET_NO if not
829 GNUNET_TESTING_topology_get(enum GNUNET_TESTING_Topology *topology,
830 const char * topology_string);
833 * Get connect topology option from string input.
835 * @param topology_option where to write the retrieved topology
836 * @param topology_string The string to attempt to
837 * get a configuration value from
838 * @return GNUNET_YES if topology string matched a
839 * known topology, GNUNET_NO if not
842 GNUNET_TESTING_topology_option_get(enum GNUNET_TESTING_TopologyOption *topology_option,
843 const char * topology_string);
847 * Takes a peer group and creates a topology based on the
848 * one specified. Creates a topology means generates friend
849 * files for the peers so they can only connect to those allowed
850 * by the topology. This will only have an effect once peers
851 * are started if the FRIENDS_ONLY option is set in the base
854 * Also takes an optional restrict topology which
855 * disallows direct connections UNLESS they are specified in
856 * the restricted topology.
858 * A simple example; if the topology option is set to LINE
859 * peers can ONLY connect in a LINE. However, if the topology
860 * option is set to 2D-torus and the restrict option is set to
861 * line with restrict_transports equal to "tcp udp", then peers
862 * may connect in a 2D-torus, but will be restricted to tcp and
863 * udp connections only in a LINE. Generally it only makes
864 * sense to do this if restrict_topology is a subset of topology.
866 * For testing peer discovery, etc. it is generally better to
867 * leave restrict_topology as GNUNET_TESTING_TOPOLOGY_NONE and
868 * then use the connect_topology function to restrict the initial
871 * @param pg the peer group struct representing the running peers
872 * @param topology which topology to connect the peers in
873 * @param restrict_topology allow only direct connections in this topology,
874 * based on those listed in restrict_transports, set to
875 * GNUNET_TESTING_TOPOLOGY_NONE for no restrictions
876 * @param restrict_transports space delimited list of transports to blacklist
877 * to create restricted topology, NULL for none
879 * @return the maximum number of connections were all allowed peers
880 * connected to each other
883 GNUNET_TESTING_create_topology (struct GNUNET_TESTING_PeerGroup *pg,
884 enum GNUNET_TESTING_Topology topology,
885 enum GNUNET_TESTING_Topology restrict_topology,
886 const char *restrict_transports);
889 * Iterate over all (running) peers in the peer group, retrieve
890 * all connections that each currently has.
892 * @param pg the peer group we are concerned with
893 * @param cb callback for topology information
894 * @param cls closure for callback
897 GNUNET_TESTING_get_topology (struct GNUNET_TESTING_PeerGroup *pg,
898 GNUNET_TESTING_NotifyTopology cb, void *cls);
901 * Stop the connection process temporarily.
903 * @param pg the peer group to stop connecting
905 void GNUNET_TESTING_stop_connections(struct GNUNET_TESTING_PeerGroup *pg);
908 * Resume the connection process.
910 * @param pg the peer group to resume connecting
912 void GNUNET_TESTING_resume_connections(struct GNUNET_TESTING_PeerGroup *pg);
915 * There are many ways to connect peers that are supported by this function.
916 * To connect peers in the same topology that was created via the
917 * GNUNET_TESTING_create_topology, the topology variable must be set to
918 * GNUNET_TESTING_TOPOLOGY_NONE. If the topology variable is specified,
919 * a new instance of that topology will be generated and attempted to be
920 * connected. This could result in some connections being impossible,
921 * because some topologies are non-deterministic.
923 * @param pg the peer group struct representing the running peers
924 * @param topology which topology to connect the peers in
925 * @param options options for connecting the topology
926 * @param option_modifier modifier for options that take a parameter
927 * @param connect_timeout how long to wait before giving up on connecting
929 * @param connect_attempts how many times to attempt to connect two peers
930 * over the connect_timeout duration
931 * @param notify_callback notification to be called once all connections completed
932 * @param notify_cls closure for notification callback
934 * @return the number of connections that will be attempted, GNUNET_SYSERR on error
937 GNUNET_TESTING_connect_topology (struct GNUNET_TESTING_PeerGroup *pg,
938 enum GNUNET_TESTING_Topology topology,
939 enum GNUNET_TESTING_TopologyOption options,
940 double option_modifier,
941 struct GNUNET_TIME_Relative connect_timeout,
942 unsigned int connect_attempts,
943 GNUNET_TESTING_NotifyCompletion
944 notify_callback, void *notify_cls);
947 * Start or stop an individual peer from the given group.
949 * @param pg handle to the peer group
950 * @param offset which peer to start or stop
951 * @param desired_status GNUNET_YES to have it running, GNUNET_NO to stop it
952 * @param timeout how long to wait for shutdown
953 * @param cb function to call at the end
954 * @param cb_cls closure for cb
957 GNUNET_TESTING_daemons_vary (struct GNUNET_TESTING_PeerGroup *pg,
960 struct GNUNET_TIME_Relative timeout,
961 GNUNET_TESTING_NotifyCompletion cb,
965 #if 0 /* keep Emacsens' auto-indent happy */