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,
93 GNUNET_PeerIdentity * id,
95 GNUNET_TESTING_Daemon * d,
99 * Prototype of a function that will be called whenever
100 * a daemon was started by the testing library.
103 * @param id identifier for the daemon, NULL on error
104 * @param cfg configuration used by this daemon
105 * @param d handle for the daemon
106 * @param emsg error message (NULL on success)
108 typedef void (*GNUNET_TESTING_NotifyDaemonRunning) (void *cls,
110 GNUNET_PeerIdentity * id,
112 GNUNET_CONFIGURATION_Handle
114 struct GNUNET_TESTING_Daemon
115 * d, const char *emsg);
118 * Handle to an entire testbed of GNUnet peers.
120 struct GNUNET_TESTING_Testbed;
123 * Phases of starting GNUnet on a system.
125 enum GNUNET_TESTING_StartPhase
128 * Copy the configuration file to the target system.
133 * Configuration file has been copied, generate hostkey.
138 * Create the hostkey for the peer.
143 * Hostkey generated, wait for topology to be finished.
148 * Topology has been created, now start ARM.
153 * ARM has been started, check that it has properly daemonized and
154 * then try to connect to the CORE service (which should be
155 * auto-started by ARM).
160 * We're waiting for CORE to start.
165 * CORE is up, now make sure we get the HELLO for this peer.
170 * Core has notified us that we've established a connection to the service.
171 * The main FSM halts here and waits to be moved to UPDATE or CLEANUP.
176 * We've been asked to terminate the instance and are now waiting for
177 * the remote command to stop the gnunet-arm process and delete temporary
183 * We should shutdown a *single* service via gnunet-arm. Call the dead_cb
184 * upon notification from gnunet-arm that the service has been stopped.
186 SP_SERVICE_SHUTDOWN_START,
189 * We should start a *single* service via gnunet-arm. Call the daemon cb
190 * upon notification from gnunet-arm that the service has been started.
195 * We've received a configuration update and are currently waiting for
196 * the copy process for the update to complete. Once it is, we will
197 * return to "SP_START_DONE" (and rely on ARM to restart all affected
204 * Prototype of a function that will be called when a
205 * particular operation was completed the testing library.
208 * @param emsg NULL on success
210 typedef void (*GNUNET_TESTING_NotifyCompletion) (void *cls, const char *emsg);
213 * Prototype of a function that will be called with the
214 * number of connections created for a particular topology.
217 * @param num_connections the number of connections created
219 typedef void (*GNUNET_TESTING_NotifyConnections) (void *cls,
220 unsigned int num_connections);
223 * Handle for a GNUnet daemon (technically a set of
224 * daemons; the handle is really for the master ARM
225 * daemon) started by the testing library.
227 struct GNUNET_TESTING_Daemon
232 struct GNUNET_CONFIGURATION_Handle *cfg;
235 * At what time to give up starting the peer
237 struct GNUNET_TIME_Absolute max_timeout;
240 * Host to run GNUnet on.
245 * Port to use for ssh, NULL to let system choose default.
250 * Result of GNUNET_i2s of this peer,
256 * Username we are using.
261 * Name of the configuration file
266 * Callback to inform initiator that the peer's
267 * hostkey has been created.
269 GNUNET_TESTING_NotifyHostkeyCreated hostkey_callback;
272 * Closure for hostkey creation callback.
277 * Function to call when the peer is running.
279 GNUNET_TESTING_NotifyDaemonRunning cb;
287 * Arguments from "daemon_stop" call.
289 GNUNET_TESTING_NotifyCompletion dead_cb;
292 * Closure for 'dead_cb'.
297 * Arguments from "daemon_stop" call.
299 GNUNET_TESTING_NotifyCompletion update_cb;
302 * Closure for 'update_cb'.
307 * PID of the process that we started last.
309 struct GNUNET_OS_Process *proc;
312 * Handle to the server.
314 struct GNUNET_CORE_Handle *server;
317 * Handle to the transport service of this peer
319 struct GNUNET_TRANSPORT_Handle *th;
322 * HELLO message for this peer
324 struct GNUNET_HELLO_Message *hello;
327 * Handle to a pipe for reading the hostkey.
329 struct GNUNET_DISK_PipeHandle *pipe_stdout;
332 * Currently, a single char * pointing to a service
333 * that has been churned off.
335 * FIXME: make this a linked list of services that have been churned off!!!
337 char *churned_services;
340 * ID of the current task.
342 GNUNET_SCHEDULER_TaskIdentifier task;
345 * Identity of this peer (once started).
347 struct GNUNET_PeerIdentity id;
350 * Flag to indicate that we've already been asked
351 * to terminate (but could not because some action
352 * was still pending).
357 * GNUNET_YES if the hostkey has been created
358 * for this peer, GNUNET_NO otherwise.
363 * In which phase are we during the start of
366 enum GNUNET_TESTING_StartPhase phase;
369 * Current position in 'hostkeybuf' (for reading from gnunet-peerinfo)
371 unsigned int hostkeybufpos;
374 * Set to GNUNET_YES once the peer is up.
379 * Used to tell shutdown not to remove configuration for the peer
380 * (if it's going to be restarted later)
385 * Output from gnunet-peerinfo is read into this buffer.
387 char hostkeybuf[105];
393 * Handle to a group of GNUnet peers.
395 struct GNUNET_TESTING_PeerGroup;
399 * Prototype of a function that will be called whenever
400 * two daemons are connected by the testing library.
403 * @param first peer id for first daemon
404 * @param second peer id for the second daemon
405 * @param distance distance between the connected peers
406 * @param first_cfg config for the first daemon
407 * @param second_cfg config for the second daemon
408 * @param first_daemon handle for the first daemon
409 * @param second_daemon handle for the second daemon
410 * @param emsg error message (NULL on success)
412 typedef void (*GNUNET_TESTING_NotifyConnection) (void *cls,
414 GNUNET_PeerIdentity * first,
416 GNUNET_PeerIdentity * second,
419 GNUNET_CONFIGURATION_Handle *
422 GNUNET_CONFIGURATION_Handle *
424 struct GNUNET_TESTING_Daemon *
426 struct GNUNET_TESTING_Daemon *
431 * Prototype of a callback function indicating that two peers
432 * are currently connected.
435 * @param first peer id for first daemon
436 * @param second peer id for the second daemon
437 * @param distance distance between the connected peers
438 * @param emsg error message (NULL on success)
440 typedef void (*GNUNET_TESTING_NotifyTopology) (void *cls,
441 const struct GNUNET_PeerIdentity
443 const struct GNUNET_PeerIdentity
444 * second, const char *emsg);
447 * Starts a GNUnet daemon. GNUnet must be installed on the target
448 * system and available in the PATH. The machine must furthermore be
449 * reachable via "ssh" (unless the hostname is "NULL") without the
450 * need to enter a password.
452 * @param cfg configuration to use
453 * @param timeout how long to wait starting up peers
454 * @param pretend GNUNET_YES to set up files but not start peer GNUNET_NO
455 * to really start the peer (default)
456 * @param hostname name of the machine where to run GNUnet
457 * (use NULL for localhost).
458 * @param ssh_username ssh username to use when connecting to hostname
459 * @param sshport port to pass to ssh process when connecting to hostname
460 * @param hostkey pointer to a hostkey to be written to disk (instead of being generated)
461 * @param hostkey_callback function to call once the hostkey has been
462 * generated for this peer, but it hasn't yet been started
463 * (NULL to start immediately, otherwise waits on GNUNET_TESTING_daemon_continue_start)
464 * @param hostkey_cls closure for hostkey callback
465 * @param cb function to call once peer is up, or failed to start
466 * @param cb_cls closure for cb
467 * @return handle to the daemon (actual start will be completed asynchronously)
469 struct GNUNET_TESTING_Daemon *
470 GNUNET_TESTING_daemon_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
471 struct GNUNET_TIME_Relative timeout, int pretend,
472 const char *hostname, const char *ssh_username,
473 uint16_t sshport, const char *hostkey,
474 GNUNET_TESTING_NotifyHostkeyCreated
475 hostkey_callback, void *hostkey_cls,
476 GNUNET_TESTING_NotifyDaemonRunning cb,
480 * Continues GNUnet daemon startup when user wanted to be notified
481 * once a hostkey was generated (for creating friends files, blacklists,
484 * @param daemon the daemon to finish starting
487 GNUNET_TESTING_daemon_continue_startup (struct GNUNET_TESTING_Daemon *daemon);
490 * Check whether the given daemon is running.
492 * @param daemon the daemon to check
494 * @return GNUNET_YES if the daemon is up, GNUNET_NO if the
495 * daemon is down, GNUNET_SYSERR on error.
498 GNUNET_TESTING_daemon_running (struct GNUNET_TESTING_Daemon *daemon);
501 * Restart (stop and start) a GNUnet daemon.
503 * @param d the daemon that should be restarted
504 * @param cb function called once the daemon is (re)started
505 * @param cb_cls closure for cb
508 GNUNET_TESTING_daemon_restart (struct GNUNET_TESTING_Daemon *d,
509 GNUNET_TESTING_NotifyDaemonRunning cb,
513 * Start a peer that has previously been stopped using the daemon_stop
514 * call (and files weren't deleted and the allow restart flag)
516 * @param daemon the daemon to start (has been previously stopped)
517 * @param timeout how long to wait for restart
518 * @param cb the callback for notification when the peer is running
519 * @param cb_cls closure for the callback
522 GNUNET_TESTING_daemon_start_stopped (struct GNUNET_TESTING_Daemon *daemon,
523 struct GNUNET_TIME_Relative timeout,
524 GNUNET_TESTING_NotifyDaemonRunning cb,
528 * Starts a GNUnet daemon's service.
530 * @param d the daemon for which the service should be started
531 * @param service the name of the service to start
532 * @param timeout how long to wait for process for startup
533 * @param cb function called once gnunet-arm returns
534 * @param cb_cls closure for cb
537 GNUNET_TESTING_daemon_start_service (struct GNUNET_TESTING_Daemon *d,
539 struct GNUNET_TIME_Relative timeout,
540 GNUNET_TESTING_NotifyDaemonRunning cb,
544 * Starts a GNUnet daemon's service which has been previously turned off.
546 * @param d the daemon for which the service should be started
547 * @param service the name of the service to start
548 * @param timeout how long to wait for process for startup
549 * @param cb function called once gnunet-arm returns
550 * @param cb_cls closure for cb
553 GNUNET_TESTING_daemon_start_stopped_service (struct GNUNET_TESTING_Daemon *d,
555 struct GNUNET_TIME_Relative
557 GNUNET_TESTING_NotifyDaemonRunning
561 * Get a certain testing daemon handle.
563 * @param pg handle to the set of running peers
564 * @param position the number of the peer to return
566 struct GNUNET_TESTING_Daemon *
567 GNUNET_TESTING_daemon_get (struct GNUNET_TESTING_PeerGroup *pg,
568 unsigned int position);
572 * Get a daemon by peer identity, so callers can
573 * retrieve the daemon without knowing it's offset.
575 * @param pg the peer group to retrieve the daemon from
576 * @param peer_id the peer identity of the daemon to retrieve
578 * @return the daemon on success, or NULL if no such peer identity is found
580 struct GNUNET_TESTING_Daemon *
581 GNUNET_TESTING_daemon_get_by_id (struct GNUNET_TESTING_PeerGroup *pg,
582 struct GNUNET_PeerIdentity *peer_id);
586 * Stops a GNUnet daemon.
588 * @param d the daemon that should be stopped
589 * @param timeout how long to wait for process for shutdown to complete
590 * @param cb function called once the daemon was stopped
591 * @param cb_cls closure for cb
592 * @param delete_files GNUNET_YES to remove files, GNUNET_NO
593 * to leave them (i.e. for restarting at a later time,
594 * or logfile inspection once finished)
595 * @param allow_restart GNUNET_YES to restart peer later (using this API)
596 * GNUNET_NO to kill off and clean up for good
599 GNUNET_TESTING_daemon_stop (struct GNUNET_TESTING_Daemon *d,
600 struct GNUNET_TIME_Relative timeout,
601 GNUNET_TESTING_NotifyCompletion cb, void *cb_cls,
602 int delete_files, int allow_restart);
606 * Changes the configuration of a GNUnet daemon.
608 * @param d the daemon that should be modified
609 * @param cfg the new configuration for the daemon
610 * @param cb function called once the configuration was changed
611 * @param cb_cls closure for cb
614 GNUNET_TESTING_daemon_reconfigure (struct GNUNET_TESTING_Daemon *d,
615 struct GNUNET_CONFIGURATION_Handle *cfg,
616 GNUNET_TESTING_NotifyCompletion cb,
621 * Stops a single service of a GNUnet daemon. Used like daemon_stop,
622 * only doesn't stop the entire peer in any case. If the service
623 * is not currently running, this call is likely to fail after
626 * @param d the daemon that should be stopped
627 * @param service the name of the service to stop
628 * @param timeout how long to wait for process for shutdown to complete
629 * @param cb function called once the service was stopped
630 * @param cb_cls closure for cb
633 GNUNET_TESTING_daemon_stop_service (struct GNUNET_TESTING_Daemon *d,
635 struct GNUNET_TIME_Relative timeout,
636 GNUNET_TESTING_NotifyCompletion cb,
641 * Read a testing hosts file based on a configuration.
642 * Returns a DLL of hosts (caller must free!) on success
643 * or NULL on failure.
645 * @param cfg a configuration with a testing section
647 * @return DLL of hosts on success, NULL on failure
649 struct GNUNET_TESTING_Host *
650 GNUNET_TESTING_hosts_load (const struct GNUNET_CONFIGURATION_Handle *cfg);
654 * Start count gnunet instances with the same set of transports and
655 * applications. The port numbers (any option called "PORT") will be
656 * adjusted to ensure that no two peers running on the same system
657 * have the same port(s) in their respective configurations.
659 * @param cfg configuration template to use
660 * @param total number of daemons to start
661 * @param max_concurrent_connections for testing, how many peers can
662 * we connect to simultaneously
663 * @param max_concurrent_ssh when starting with ssh, how many ssh
664 * connections will we allow at once (based on remote hosts allowed!)
665 * @param timeout total time allowed for peers to start
666 * @param hostkey_callback function to call on each peers hostkey generation
667 * if NULL, peers will be started by this call, if non-null,
668 * GNUNET_TESTING_daemons_continue_startup must be called after
669 * successful hostkey generation
670 * @param hostkey_cls closure for hostkey callback
671 * @param cb function to call on each daemon that was started
672 * @param cb_cls closure for cb
673 * @param connect_callback function to call each time two hosts are connected
674 * @param connect_callback_cls closure for connect_callback
675 * @param hostnames linked list of host structs to use to start peers on
676 * (NULL to run on localhost only)
678 * @return NULL on error, otherwise handle to control peer group
680 struct GNUNET_TESTING_PeerGroup *
681 GNUNET_TESTING_daemons_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
683 unsigned int max_concurrent_connections,
684 unsigned int max_concurrent_ssh,
685 struct GNUNET_TIME_Relative timeout,
686 GNUNET_TESTING_NotifyHostkeyCreated
687 hostkey_callback, void *hostkey_cls,
688 GNUNET_TESTING_NotifyDaemonRunning cb,
690 GNUNET_TESTING_NotifyConnection connect_callback,
691 void *connect_callback_cls,
692 const struct GNUNET_TESTING_Host *hostnames);
696 * Function which continues a peer group starting up
697 * after successfully generating hostkeys for each peer.
699 * @param pg the peer group to continue starting
702 GNUNET_TESTING_daemons_continue_startup (struct GNUNET_TESTING_PeerGroup *pg);
706 * Establish a connection between two GNUnet daemons.
708 * @param d1 handle for the first daemon
709 * @param d2 handle for the second daemon
710 * @param timeout how long is the connection attempt
712 * @param max_connect_attempts how many times should we try to reconnect
714 * @param send_hello GNUNET_YES to send the HELLO, GNUNET_NO to assume
715 * the HELLO has already been exchanged
716 * @param cb function to call at the end
717 * @param cb_cls closure for cb
719 struct GNUNET_TESTING_ConnectContext *
720 GNUNET_TESTING_daemons_connect (struct GNUNET_TESTING_Daemon *d1,
721 struct GNUNET_TESTING_Daemon *d2,
722 struct GNUNET_TIME_Relative timeout,
723 unsigned int max_connect_attempts,
725 GNUNET_TESTING_NotifyConnection cb,
730 * Cancel an attempt to connect two daemons.
732 * @param cc connect context
735 GNUNET_TESTING_daemons_connect_cancel (struct GNUNET_TESTING_ConnectContext *cc);
739 * Restart all peers in the given group.
741 * @param pg the handle to the peer group
742 * @param callback function to call on completion (or failure)
743 * @param callback_cls closure for the callback function
746 GNUNET_TESTING_daemons_restart (struct GNUNET_TESTING_PeerGroup *pg,
747 GNUNET_TESTING_NotifyCompletion callback,
752 * Shutdown all peers started in the given group.
754 * @param pg handle to the peer group
755 * @param timeout how long to wait for shutdown
756 * @param cb callback to notify upon success or failure
757 * @param cb_cls closure for cb
760 GNUNET_TESTING_daemons_stop (struct GNUNET_TESTING_PeerGroup *pg,
761 struct GNUNET_TIME_Relative timeout,
762 GNUNET_TESTING_NotifyCompletion cb, void *cb_cls);
766 * Count the number of running peers.
768 * @param pg handle for the peer group
770 * @return the number of currently running peers in the peer group
773 GNUNET_TESTING_daemons_running (struct GNUNET_TESTING_PeerGroup *pg);
777 * Simulate churn by stopping some peers (and possibly
778 * re-starting others if churn is called multiple times). This
779 * function can only be used to create leave-join churn (peers "never"
780 * leave for good). First "voff" random peers that are currently
781 * online will be taken offline; then "von" random peers that are then
782 * offline will be put back online. No notifications will be
783 * generated for any of these operations except for the callback upon
784 * completion. Note that the implementation is at liberty to keep
785 * the ARM service itself (but none of the other services or daemons)
786 * running even though the "peer" is being varied offline.
788 * @param pg handle for the peer group
789 * @param service the service to churn on/off, NULL for all
790 * @param voff number of peers that should go offline
791 * @param von number of peers that should come back online;
792 * must be zero on first call (since "testbed_start"
793 * always starts all of the peers)
794 * @param timeout how long to wait for operations to finish before
796 * @param cb function to call at the end
797 * @param cb_cls closure for cb
800 GNUNET_TESTING_daemons_churn (struct GNUNET_TESTING_PeerGroup *pg,
801 char *service, unsigned int voff,
803 struct GNUNET_TIME_Relative timeout,
804 GNUNET_TESTING_NotifyCompletion cb, void *cb_cls);
808 * Start a given service for each of the peers in the peer group.
810 * @param pg handle for the peer group
811 * @param service the service to start
812 * @param timeout how long to wait for operations to finish before
814 * @param cb function to call once finished
815 * @param cb_cls closure for cb
819 GNUNET_TESTING_daemons_start_service (struct GNUNET_TESTING_PeerGroup *pg,
821 struct GNUNET_TIME_Relative timeout,
822 GNUNET_TESTING_NotifyCompletion cb,
827 * Callback function to process statistic values.
830 * @param peer the peer the statistics belong to
831 * @param subsystem name of subsystem that created the statistic
832 * @param name the name of the datum
833 * @param value the current value
834 * @param is_persistent GNUNET_YES if the value is persistent, GNUNET_NO if not
835 * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
837 typedef int (*GNUNET_TESTING_STATISTICS_Iterator) (void *cls,
839 GNUNET_PeerIdentity * peer,
840 const char *subsystem,
847 * Iterate over all (running) peers in the peer group, retrieve
848 * all statistics from each.
850 * @param pg the peergroup to iterate statistics of
851 * @param cont continuation to call once call is completed(?)
852 * @param proc processing function for each statistic retrieved
853 * @param cls closure to pass to proc
856 GNUNET_TESTING_get_statistics (struct GNUNET_TESTING_PeerGroup *pg,
857 GNUNET_STATISTICS_Callback cont,
858 GNUNET_TESTING_STATISTICS_Iterator proc,
863 * Topologies supported for testbeds.
865 enum GNUNET_TESTING_Topology
868 * A clique (everyone connected to everyone else).
870 GNUNET_TESTING_TOPOLOGY_CLIQUE,
873 * Small-world network (2d torus plus random links).
875 GNUNET_TESTING_TOPOLOGY_SMALL_WORLD,
878 * Small-world network (ring plus random links).
880 GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING,
885 GNUNET_TESTING_TOPOLOGY_RING,
890 GNUNET_TESTING_TOPOLOGY_2D_TORUS,
895 GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI,
898 * Certain percentage of peers are unable to communicate directly
899 * replicating NAT conditions
901 GNUNET_TESTING_TOPOLOGY_INTERNAT,
904 * Scale free topology.
906 GNUNET_TESTING_TOPOLOGY_SCALE_FREE,
909 * Straight line topology.
911 GNUNET_TESTING_TOPOLOGY_LINE,
914 * All peers are disconnected.
916 GNUNET_TESTING_TOPOLOGY_NONE,
919 * Read a topology from a given file.
921 GNUNET_TESTING_TOPOLOGY_FROM_FILE
925 * Options for connecting a topology.
927 enum GNUNET_TESTING_TopologyOption
930 * Try to connect all peers specified in the topology.
932 GNUNET_TESTING_TOPOLOGY_OPTION_ALL,
935 * Choose a random subset of connections to create.
937 GNUNET_TESTING_TOPOLOGY_OPTION_RANDOM,
940 * Create at least X connections for each peer.
942 GNUNET_TESTING_TOPOLOGY_OPTION_MINIMUM,
945 * Using a depth first search, create one connection
946 * per peer. If any are missed (graph disconnected)
947 * start over at those peers until all have at least one
950 GNUNET_TESTING_TOPOLOGY_OPTION_DFS,
953 * Find the N closest peers to each allowed peer in the
954 * topology and make sure a connection to those peers
955 * exists in the connect topology.
957 GNUNET_TESTING_TOPOLOGY_OPTION_ADD_CLOSEST,
960 * No options specified.
962 GNUNET_TESTING_TOPOLOGY_OPTION_NONE
967 * Get a topology from a string input.
969 * @param topology where to write the retrieved topology
970 * @param topology_string The string to attempt to
971 * get a configuration value from
972 * @return GNUNET_YES if topology string matched a
973 * known topology, GNUNET_NO if not
976 GNUNET_TESTING_topology_get (enum GNUNET_TESTING_Topology *topology,
977 const char *topology_string);
981 * Get connect topology option from string input.
983 * @param topology_option where to write the retrieved topology
984 * @param topology_string The string to attempt to
985 * get a configuration value from
986 * @return GNUNET_YES if topology string matched a
987 * known topology, GNUNET_NO if not
990 GNUNET_TESTING_topology_option_get (enum GNUNET_TESTING_TopologyOption
992 const char *topology_string);
996 * Takes a peer group and creates a topology based on the
997 * one specified. Creates a topology means generates friend
998 * files for the peers so they can only connect to those allowed
999 * by the topology. This will only have an effect once peers
1000 * are started if the FRIENDS_ONLY option is set in the base
1003 * Also takes an optional restrict topology which
1004 * disallows direct connections UNLESS they are specified in
1005 * the restricted topology.
1007 * A simple example; if the topology option is set to LINE
1008 * peers can ONLY connect in a LINE. However, if the topology
1009 * option is set to 2D-torus and the restrict option is set to
1010 * line with restrict_transports equal to "tcp udp", then peers
1011 * may connect in a 2D-torus, but will be restricted to tcp and
1012 * udp connections only in a LINE. Generally it only makes
1013 * sense to do this if restrict_topology is a subset of topology.
1015 * For testing peer discovery, etc. it is generally better to
1016 * leave restrict_topology as GNUNET_TESTING_TOPOLOGY_NONE and
1017 * then use the connect_topology function to restrict the initial
1020 * @param pg the peer group struct representing the running peers
1021 * @param topology which topology to connect the peers in
1022 * @param restrict_topology allow only direct connections in this topology,
1023 * based on those listed in restrict_transports, set to
1024 * GNUNET_TESTING_TOPOLOGY_NONE for no restrictions
1025 * @param restrict_transports space delimited list of transports to blacklist
1026 * to create restricted topology, NULL for none
1028 * @return the maximum number of connections were all allowed peers
1029 * connected to each other
1032 GNUNET_TESTING_create_topology (struct GNUNET_TESTING_PeerGroup *pg,
1033 enum GNUNET_TESTING_Topology topology,
1034 enum GNUNET_TESTING_Topology restrict_topology,
1035 const char *restrict_transports);
1039 * Iterate over all (running) peers in the peer group, retrieve
1040 * all connections that each currently has.
1042 * @param pg the peer group we are concerned with
1043 * @param cb callback for topology information
1044 * @param cls closure for callback
1047 GNUNET_TESTING_get_topology (struct GNUNET_TESTING_PeerGroup *pg,
1048 GNUNET_TESTING_NotifyTopology cb, void *cls);
1052 * Stop the connection process temporarily.
1054 * @param pg the peer group to stop connecting
1057 GNUNET_TESTING_stop_connections (struct GNUNET_TESTING_PeerGroup *pg);
1061 * Resume the connection process.
1063 * @param pg the peer group to resume connecting
1066 GNUNET_TESTING_resume_connections (struct GNUNET_TESTING_PeerGroup *pg);
1070 * There are many ways to connect peers that are supported by this function.
1071 * To connect peers in the same topology that was created via the
1072 * GNUNET_TESTING_create_topology, the topology variable must be set to
1073 * GNUNET_TESTING_TOPOLOGY_NONE. If the topology variable is specified,
1074 * a new instance of that topology will be generated and attempted to be
1075 * connected. This could result in some connections being impossible,
1076 * because some topologies are non-deterministic.
1078 * @param pg the peer group struct representing the running peers
1079 * @param topology which topology to connect the peers in
1080 * @param options options for connecting the topology
1081 * @param option_modifier modifier for options that take a parameter
1082 * @param connect_timeout how long to wait before giving up on connecting
1084 * @param connect_attempts how many times to attempt to connect two peers
1085 * over the connect_timeout duration
1086 * @param notify_callback notification to be called once all connections completed
1087 * @param notify_cls closure for notification callback
1089 * @return the number of connections that will be attempted, GNUNET_SYSERR on error
1092 GNUNET_TESTING_connect_topology (struct GNUNET_TESTING_PeerGroup *pg,
1093 enum GNUNET_TESTING_Topology topology,
1094 enum GNUNET_TESTING_TopologyOption options,
1095 double option_modifier,
1096 struct GNUNET_TIME_Relative connect_timeout,
1097 unsigned int connect_attempts,
1098 GNUNET_TESTING_NotifyCompletion
1099 notify_callback, void *notify_cls);
1103 * Start or stop an individual peer from the given group.
1105 * @param pg handle to the peer group
1106 * @param offset which peer to start or stop
1107 * @param desired_status GNUNET_YES to have it running, GNUNET_NO to stop it
1108 * @param timeout how long to wait for shutdown
1109 * @param cb function to call at the end
1110 * @param cb_cls closure for cb
1113 GNUNET_TESTING_daemons_vary (struct GNUNET_TESTING_PeerGroup *pg,
1114 unsigned int offset, int desired_status,
1115 struct GNUNET_TIME_Relative timeout,
1116 GNUNET_TESTING_NotifyCompletion cb, void *cb_cls);
1120 * Start a peer group with a given number of peers. Notify
1121 * on completion of peer startup and connection based on given
1122 * topological constraints. Optionally notify on each
1123 * established connection.
1125 * @param cfg configuration template to use
1126 * @param total number of daemons to start
1127 * @param timeout total time allowed for peers to start
1128 * @param connect_cb function to call each time two daemons are connected
1129 * @param peergroup_cb function to call once all peers are up and connected
1130 * @param peergroup_cls closure for peergroup callbacks
1131 * @param hostnames linked list of host structs to use to start peers on
1132 * (NULL to run on localhost only)
1134 * @return NULL on error, otherwise handle to control peer group
1136 struct GNUNET_TESTING_PeerGroup *
1137 GNUNET_TESTING_peergroup_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
1139 struct GNUNET_TIME_Relative timeout,
1140 GNUNET_TESTING_NotifyConnection connect_cb,
1141 GNUNET_TESTING_NotifyCompletion peergroup_cb,
1142 void *peergroup_cls,
1143 const struct GNUNET_TESTING_Host *hostnames);
1147 * Print current topology to a graphviz readable file.
1149 * @param pg a currently running peergroup to print to file
1150 * @param output_filename the file to write the topology to
1151 * @param notify_cb callback to call upon completion or failure
1152 * @param notify_cb_cls closure for notify_cb
1156 GNUNET_TESTING_peergroup_topology_to_file (struct GNUNET_TESTING_PeerGroup *pg,
1157 const char *output_filename,
1158 GNUNET_TESTING_NotifyCompletion
1159 notify_cb, void *notify_cb_cls);
1162 #if 0 /* keep Emacsens' auto-indent happy */