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);
448 * Starts a GNUnet daemon. GNUnet must be installed on the target
449 * system and available in the PATH. The machine must furthermore be
450 * reachable via "ssh" (unless the hostname is "NULL") without the
451 * need to enter a password.
453 * @param cfg configuration to use
454 * @param timeout how long to wait starting up peers
455 * @param pretend GNUNET_YES to set up files but not start peer GNUNET_NO
456 * to really start the peer (default)
457 * @param hostname name of the machine where to run GNUnet
458 * (use NULL for localhost).
459 * @param ssh_username ssh username to use when connecting to hostname
460 * @param sshport port to pass to ssh process when connecting to hostname
461 * @param hostkey pointer to a hostkey to be written to disk (instead of being generated)
462 * @param hostkey_callback function to call once the hostkey has been
463 * generated for this peer, but it hasn't yet been started
464 * (NULL to start immediately, otherwise waits on GNUNET_TESTING_daemon_continue_start)
465 * @param hostkey_cls closure for hostkey callback
466 * @param cb function to call once peer is up, or failed to start
467 * @param cb_cls closure for cb
468 * @return handle to the daemon (actual start will be completed asynchronously)
470 struct GNUNET_TESTING_Daemon *
471 GNUNET_TESTING_daemon_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
472 struct GNUNET_TIME_Relative timeout, int pretend,
473 const char *hostname, const char *ssh_username,
474 uint16_t sshport, const char *hostkey,
475 GNUNET_TESTING_NotifyHostkeyCreated
476 hostkey_callback, void *hostkey_cls,
477 GNUNET_TESTING_NotifyDaemonRunning cb,
481 * Continues GNUnet daemon startup when user wanted to be notified
482 * once a hostkey was generated (for creating friends files, blacklists,
485 * @param daemon the daemon to finish starting
488 GNUNET_TESTING_daemon_continue_startup (struct GNUNET_TESTING_Daemon *daemon);
492 * Check whether the given daemon is running.
494 * @param daemon the daemon to check
496 * @return GNUNET_YES if the daemon is up, GNUNET_NO if the
497 * daemon is down, GNUNET_SYSERR on error.
500 GNUNET_TESTING_daemon_running (struct GNUNET_TESTING_Daemon *daemon);
504 * Restart (stop and start) a GNUnet daemon.
506 * @param d the daemon that should be restarted
507 * @param cb function called once the daemon is (re)started
508 * @param cb_cls closure for cb
511 GNUNET_TESTING_daemon_restart (struct GNUNET_TESTING_Daemon *d,
512 GNUNET_TESTING_NotifyDaemonRunning cb,
517 * Start a peer that has previously been stopped using the daemon_stop
518 * call (and files weren't deleted and the allow restart flag)
520 * @param daemon the daemon to start (has been previously stopped)
521 * @param timeout how long to wait for restart
522 * @param cb the callback for notification when the peer is running
523 * @param cb_cls closure for the callback
526 GNUNET_TESTING_daemon_start_stopped (struct GNUNET_TESTING_Daemon *daemon,
527 struct GNUNET_TIME_Relative timeout,
528 GNUNET_TESTING_NotifyDaemonRunning cb,
533 * Starts a GNUnet daemon's service.
535 * @param d the daemon for which the service should be started
536 * @param service the name of the service to start
537 * @param timeout how long to wait for process for startup
538 * @param cb function called once gnunet-arm returns
539 * @param cb_cls closure for cb
542 GNUNET_TESTING_daemon_start_service (struct GNUNET_TESTING_Daemon *d,
544 struct GNUNET_TIME_Relative timeout,
545 GNUNET_TESTING_NotifyDaemonRunning cb,
550 * Starts a GNUnet daemon's service which has been previously turned off.
552 * @param d the daemon for which the service should be started
553 * @param service the name of the service to start
554 * @param timeout how long to wait for process for startup
555 * @param cb function called once gnunet-arm returns
556 * @param cb_cls closure for cb
559 GNUNET_TESTING_daemon_start_stopped_service (struct GNUNET_TESTING_Daemon *d,
561 struct GNUNET_TIME_Relative
563 GNUNET_TESTING_NotifyDaemonRunning
568 * Get a certain testing daemon handle.
570 * @param pg handle to the set of running peers
571 * @param position the number of the peer to return
573 struct GNUNET_TESTING_Daemon *
574 GNUNET_TESTING_daemon_get (struct GNUNET_TESTING_PeerGroup *pg,
575 unsigned int position);
579 * Get a daemon by peer identity, so callers can
580 * retrieve the daemon without knowing it's offset.
582 * @param pg the peer group to retrieve the daemon from
583 * @param peer_id the peer identity of the daemon to retrieve
585 * @return the daemon on success, or NULL if no such peer identity is found
587 struct GNUNET_TESTING_Daemon *
588 GNUNET_TESTING_daemon_get_by_id (struct GNUNET_TESTING_PeerGroup *pg,
589 struct GNUNET_PeerIdentity *peer_id);
593 * Stops a GNUnet daemon.
595 * @param d the daemon that should be stopped
596 * @param timeout how long to wait for process for shutdown to complete
597 * @param cb function called once the daemon was stopped
598 * @param cb_cls closure for cb
599 * @param delete_files GNUNET_YES to remove files, GNUNET_NO
600 * to leave them (i.e. for restarting at a later time,
601 * or logfile inspection once finished)
602 * @param allow_restart GNUNET_YES to restart peer later (using this API)
603 * GNUNET_NO to kill off and clean up for good
606 GNUNET_TESTING_daemon_stop (struct GNUNET_TESTING_Daemon *d,
607 struct GNUNET_TIME_Relative timeout,
608 GNUNET_TESTING_NotifyCompletion cb, void *cb_cls,
609 int delete_files, int allow_restart);
613 * Changes the configuration of a GNUnet daemon.
615 * @param d the daemon that should be modified
616 * @param cfg the new configuration for the daemon
617 * @param cb function called once the configuration was changed
618 * @param cb_cls closure for cb
621 GNUNET_TESTING_daemon_reconfigure (struct GNUNET_TESTING_Daemon *d,
622 struct GNUNET_CONFIGURATION_Handle *cfg,
623 GNUNET_TESTING_NotifyCompletion cb,
628 * Stops a single service of a GNUnet daemon. Used like daemon_stop,
629 * only doesn't stop the entire peer in any case. If the service
630 * is not currently running, this call is likely to fail after
633 * @param d the daemon that should be stopped
634 * @param service the name of the service to stop
635 * @param timeout how long to wait for process for shutdown to complete
636 * @param cb function called once the service was stopped
637 * @param cb_cls closure for cb
640 GNUNET_TESTING_daemon_stop_service (struct GNUNET_TESTING_Daemon *d,
642 struct GNUNET_TIME_Relative timeout,
643 GNUNET_TESTING_NotifyCompletion cb,
648 * Read a testing hosts file based on a configuration.
649 * Returns a DLL of hosts (caller must free!) on success
650 * or NULL on failure.
652 * @param cfg a configuration with a testing section
654 * @return DLL of hosts on success, NULL on failure
656 struct GNUNET_TESTING_Host *
657 GNUNET_TESTING_hosts_load (const struct GNUNET_CONFIGURATION_Handle *cfg);
661 * Start count gnunet instances with the same set of transports and
662 * applications. The port numbers (any option called "PORT") will be
663 * adjusted to ensure that no two peers running on the same system
664 * have the same port(s) in their respective configurations.
666 * @param cfg configuration template to use
667 * @param total number of daemons to start
668 * @param max_concurrent_connections for testing, how many peers can
669 * we connect to simultaneously
670 * @param max_concurrent_ssh when starting with ssh, how many ssh
671 * connections will we allow at once (based on remote hosts allowed!)
672 * @param timeout total time allowed for peers to start
673 * @param hostkey_callback function to call on each peers hostkey generation
674 * if NULL, peers will be started by this call, if non-null,
675 * GNUNET_TESTING_daemons_continue_startup must be called after
676 * successful hostkey generation
677 * @param hostkey_cls closure for hostkey callback
678 * @param cb function to call on each daemon that was started
679 * @param cb_cls closure for cb
680 * @param connect_callback function to call each time two hosts are connected
681 * @param connect_callback_cls closure for connect_callback
682 * @param hostnames linked list of host structs to use to start peers on
683 * (NULL to run on localhost only)
685 * @return NULL on error, otherwise handle to control peer group
687 struct GNUNET_TESTING_PeerGroup *
688 GNUNET_TESTING_daemons_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
690 unsigned int max_concurrent_connections,
691 unsigned int max_concurrent_ssh,
692 struct GNUNET_TIME_Relative timeout,
693 GNUNET_TESTING_NotifyHostkeyCreated
694 hostkey_callback, void *hostkey_cls,
695 GNUNET_TESTING_NotifyDaemonRunning cb,
697 GNUNET_TESTING_NotifyConnection connect_callback,
698 void *connect_callback_cls,
699 const struct GNUNET_TESTING_Host *hostnames);
703 * Function which continues a peer group starting up
704 * after successfully generating hostkeys for each peer.
706 * @param pg the peer group to continue starting
709 GNUNET_TESTING_daemons_continue_startup (struct GNUNET_TESTING_PeerGroup *pg);
713 * Establish a connection between two GNUnet daemons.
715 * @param d1 handle for the first daemon
716 * @param d2 handle for the second daemon
717 * @param timeout how long is the connection attempt
719 * @param max_connect_attempts how many times should we try to reconnect
721 * @param send_hello GNUNET_YES to send the HELLO, GNUNET_NO to assume
722 * the HELLO has already been exchanged
723 * @param cb function to call at the end
724 * @param cb_cls closure for cb
726 struct GNUNET_TESTING_ConnectContext *
727 GNUNET_TESTING_daemons_connect (struct GNUNET_TESTING_Daemon *d1,
728 struct GNUNET_TESTING_Daemon *d2,
729 struct GNUNET_TIME_Relative timeout,
730 unsigned int max_connect_attempts,
732 GNUNET_TESTING_NotifyConnection cb,
737 * Cancel an attempt to connect two daemons.
739 * @param cc connect context
742 GNUNET_TESTING_daemons_connect_cancel (struct GNUNET_TESTING_ConnectContext
747 * Restart all peers in the given group.
749 * @param pg the handle to the peer group
750 * @param callback function to call on completion (or failure)
751 * @param callback_cls closure for the callback function
754 GNUNET_TESTING_daemons_restart (struct GNUNET_TESTING_PeerGroup *pg,
755 GNUNET_TESTING_NotifyCompletion callback,
760 * Shutdown all peers started in the given group.
762 * @param pg handle to the peer group
763 * @param timeout how long to wait for shutdown
764 * @param cb callback to notify upon success or failure
765 * @param cb_cls closure for cb
768 GNUNET_TESTING_daemons_stop (struct GNUNET_TESTING_PeerGroup *pg,
769 struct GNUNET_TIME_Relative timeout,
770 GNUNET_TESTING_NotifyCompletion cb, void *cb_cls);
774 * Count the number of running peers.
776 * @param pg handle for the peer group
778 * @return the number of currently running peers in the peer group
781 GNUNET_TESTING_daemons_running (struct GNUNET_TESTING_PeerGroup *pg);
785 * Simulate churn by stopping some peers (and possibly
786 * re-starting others if churn is called multiple times). This
787 * function can only be used to create leave-join churn (peers "never"
788 * leave for good). First "voff" random peers that are currently
789 * online will be taken offline; then "von" random peers that are then
790 * offline will be put back online. No notifications will be
791 * generated for any of these operations except for the callback upon
792 * completion. Note that the implementation is at liberty to keep
793 * the ARM service itself (but none of the other services or daemons)
794 * running even though the "peer" is being varied offline.
796 * @param pg handle for the peer group
797 * @param service the service to churn on/off, NULL for all
798 * @param voff number of peers that should go offline
799 * @param von number of peers that should come back online;
800 * must be zero on first call (since "testbed_start"
801 * always starts all of the peers)
802 * @param timeout how long to wait for operations to finish before
804 * @param cb function to call at the end
805 * @param cb_cls closure for cb
808 GNUNET_TESTING_daemons_churn (struct GNUNET_TESTING_PeerGroup *pg,
809 char *service, unsigned int voff,
811 struct GNUNET_TIME_Relative timeout,
812 GNUNET_TESTING_NotifyCompletion cb, void *cb_cls);
816 * Start a given service for each of the peers in the peer group.
818 * @param pg handle for the peer group
819 * @param service the service to start
820 * @param timeout how long to wait for operations to finish before
822 * @param cb function to call once finished
823 * @param cb_cls closure for cb
827 GNUNET_TESTING_daemons_start_service (struct GNUNET_TESTING_PeerGroup *pg,
829 struct GNUNET_TIME_Relative timeout,
830 GNUNET_TESTING_NotifyCompletion cb,
835 * Callback function to process statistic values.
838 * @param peer the peer the statistics belong to
839 * @param subsystem name of subsystem that created the statistic
840 * @param name the name of the datum
841 * @param value the current value
842 * @param is_persistent GNUNET_YES if the value is persistent, GNUNET_NO if not
843 * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
845 typedef int (*GNUNET_TESTING_STATISTICS_Iterator) (void *cls,
847 GNUNET_PeerIdentity * peer,
848 const char *subsystem,
855 * Iterate over all (running) peers in the peer group, retrieve
856 * all statistics from each.
858 * @param pg the peergroup to iterate statistics of
859 * @param cont continuation to call once call is completed(?)
860 * @param proc processing function for each statistic retrieved
861 * @param cls closure to pass to proc
864 GNUNET_TESTING_get_statistics (struct GNUNET_TESTING_PeerGroup *pg,
865 GNUNET_STATISTICS_Callback cont,
866 GNUNET_TESTING_STATISTICS_Iterator proc,
871 * Topologies supported for testbeds.
873 enum GNUNET_TESTING_Topology
876 * A clique (everyone connected to everyone else).
878 GNUNET_TESTING_TOPOLOGY_CLIQUE,
881 * Small-world network (2d torus plus random links).
883 GNUNET_TESTING_TOPOLOGY_SMALL_WORLD,
886 * Small-world network (ring plus random links).
888 GNUNET_TESTING_TOPOLOGY_SMALL_WORLD_RING,
893 GNUNET_TESTING_TOPOLOGY_RING,
898 GNUNET_TESTING_TOPOLOGY_2D_TORUS,
903 GNUNET_TESTING_TOPOLOGY_ERDOS_RENYI,
906 * Certain percentage of peers are unable to communicate directly
907 * replicating NAT conditions
909 GNUNET_TESTING_TOPOLOGY_INTERNAT,
912 * Scale free topology.
914 GNUNET_TESTING_TOPOLOGY_SCALE_FREE,
917 * Straight line topology.
919 GNUNET_TESTING_TOPOLOGY_LINE,
922 * All peers are disconnected.
924 GNUNET_TESTING_TOPOLOGY_NONE,
927 * Read a topology from a given file.
929 GNUNET_TESTING_TOPOLOGY_FROM_FILE
933 * Options for connecting a topology.
935 enum GNUNET_TESTING_TopologyOption
938 * Try to connect all peers specified in the topology.
940 GNUNET_TESTING_TOPOLOGY_OPTION_ALL,
943 * Choose a random subset of connections to create.
945 GNUNET_TESTING_TOPOLOGY_OPTION_RANDOM,
948 * Create at least X connections for each peer.
950 GNUNET_TESTING_TOPOLOGY_OPTION_MINIMUM,
953 * Using a depth first search, create one connection
954 * per peer. If any are missed (graph disconnected)
955 * start over at those peers until all have at least one
958 GNUNET_TESTING_TOPOLOGY_OPTION_DFS,
961 * Find the N closest peers to each allowed peer in the
962 * topology and make sure a connection to those peers
963 * exists in the connect topology.
965 GNUNET_TESTING_TOPOLOGY_OPTION_ADD_CLOSEST,
968 * No options specified.
970 GNUNET_TESTING_TOPOLOGY_OPTION_NONE
975 * Get a topology from a string input.
977 * @param topology where to write the retrieved topology
978 * @param topology_string The string to attempt to
979 * get a configuration value from
980 * @return GNUNET_YES if topology string matched a
981 * known topology, GNUNET_NO if not
984 GNUNET_TESTING_topology_get (enum GNUNET_TESTING_Topology *topology,
985 const char *topology_string);
989 * Get connect topology option from string input.
991 * @param topology_option where to write the retrieved topology
992 * @param topology_string The string to attempt to
993 * get a configuration value from
994 * @return GNUNET_YES if topology string matched a
995 * known topology, GNUNET_NO if not
998 GNUNET_TESTING_topology_option_get (enum GNUNET_TESTING_TopologyOption
1000 const char *topology_string);
1004 * Takes a peer group and creates a topology based on the
1005 * one specified. Creates a topology means generates friend
1006 * files for the peers so they can only connect to those allowed
1007 * by the topology. This will only have an effect once peers
1008 * are started if the FRIENDS_ONLY option is set in the base
1011 * Also takes an optional restrict topology which
1012 * disallows direct connections UNLESS they are specified in
1013 * the restricted topology.
1015 * A simple example; if the topology option is set to LINE
1016 * peers can ONLY connect in a LINE. However, if the topology
1017 * option is set to 2D-torus and the restrict option is set to
1018 * line with restrict_transports equal to "tcp udp", then peers
1019 * may connect in a 2D-torus, but will be restricted to tcp and
1020 * udp connections only in a LINE. Generally it only makes
1021 * sense to do this if restrict_topology is a subset of topology.
1023 * For testing peer discovery, etc. it is generally better to
1024 * leave restrict_topology as GNUNET_TESTING_TOPOLOGY_NONE and
1025 * then use the connect_topology function to restrict the initial
1028 * @param pg the peer group struct representing the running peers
1029 * @param topology which topology to connect the peers in
1030 * @param restrict_topology allow only direct connections in this topology,
1031 * based on those listed in restrict_transports, set to
1032 * GNUNET_TESTING_TOPOLOGY_NONE for no restrictions
1033 * @param restrict_transports space delimited list of transports to blacklist
1034 * to create restricted topology, NULL for none
1036 * @return the maximum number of connections were all allowed peers
1037 * connected to each other
1040 GNUNET_TESTING_create_topology (struct GNUNET_TESTING_PeerGroup *pg,
1041 enum GNUNET_TESTING_Topology topology,
1042 enum GNUNET_TESTING_Topology restrict_topology,
1043 const char *restrict_transports);
1047 * Iterate over all (running) peers in the peer group, retrieve
1048 * all connections that each currently has.
1050 * @param pg the peer group we are concerned with
1051 * @param cb callback for topology information
1052 * @param cls closure for callback
1055 GNUNET_TESTING_get_topology (struct GNUNET_TESTING_PeerGroup *pg,
1056 GNUNET_TESTING_NotifyTopology cb, void *cls);
1060 * Stop the connection process temporarily.
1062 * @param pg the peer group to stop connecting
1065 GNUNET_TESTING_stop_connections (struct GNUNET_TESTING_PeerGroup *pg);
1069 * Resume the connection process.
1071 * @param pg the peer group to resume connecting
1074 GNUNET_TESTING_resume_connections (struct GNUNET_TESTING_PeerGroup *pg);
1078 * There are many ways to connect peers that are supported by this function.
1079 * To connect peers in the same topology that was created via the
1080 * GNUNET_TESTING_create_topology, the topology variable must be set to
1081 * GNUNET_TESTING_TOPOLOGY_NONE. If the topology variable is specified,
1082 * a new instance of that topology will be generated and attempted to be
1083 * connected. This could result in some connections being impossible,
1084 * because some topologies are non-deterministic.
1086 * @param pg the peer group struct representing the running peers
1087 * @param topology which topology to connect the peers in
1088 * @param options options for connecting the topology
1089 * @param option_modifier modifier for options that take a parameter
1090 * @param connect_timeout how long to wait before giving up on connecting
1092 * @param connect_attempts how many times to attempt to connect two peers
1093 * over the connect_timeout duration
1094 * @param notify_callback notification to be called once all connections completed
1095 * @param notify_cls closure for notification callback
1097 * @return the number of connections that will be attempted, GNUNET_SYSERR on error
1100 GNUNET_TESTING_connect_topology (struct GNUNET_TESTING_PeerGroup *pg,
1101 enum GNUNET_TESTING_Topology topology,
1102 enum GNUNET_TESTING_TopologyOption options,
1103 double option_modifier,
1104 struct GNUNET_TIME_Relative connect_timeout,
1105 unsigned int connect_attempts,
1106 GNUNET_TESTING_NotifyCompletion
1107 notify_callback, void *notify_cls);
1111 * Start or stop an individual peer from the given group.
1113 * @param pg handle to the peer group
1114 * @param offset which peer to start or stop
1115 * @param desired_status GNUNET_YES to have it running, GNUNET_NO to stop it
1116 * @param timeout how long to wait for shutdown
1117 * @param cb function to call at the end
1118 * @param cb_cls closure for cb
1121 GNUNET_TESTING_daemons_vary (struct GNUNET_TESTING_PeerGroup *pg,
1122 unsigned int offset, int desired_status,
1123 struct GNUNET_TIME_Relative timeout,
1124 GNUNET_TESTING_NotifyCompletion cb, void *cb_cls);
1128 * Start a peer group with a given number of peers. Notify
1129 * on completion of peer startup and connection based on given
1130 * topological constraints. Optionally notify on each
1131 * established connection.
1133 * @param cfg configuration template to use
1134 * @param total number of daemons to start
1135 * @param timeout total time allowed for peers to start
1136 * @param connect_cb function to call each time two daemons are connected
1137 * @param peergroup_cb function to call once all peers are up and connected
1138 * @param peergroup_cls closure for peergroup callbacks
1139 * @param hostnames linked list of host structs to use to start peers on
1140 * (NULL to run on localhost only)
1142 * @return NULL on error, otherwise handle to control peer group
1144 struct GNUNET_TESTING_PeerGroup *
1145 GNUNET_TESTING_peergroup_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
1147 struct GNUNET_TIME_Relative timeout,
1148 GNUNET_TESTING_NotifyConnection connect_cb,
1149 GNUNET_TESTING_NotifyCompletion peergroup_cb,
1150 void *peergroup_cls,
1151 const struct GNUNET_TESTING_Host *hostnames);
1155 * Print current topology to a graphviz readable file.
1157 * @param pg a currently running peergroup to print to file
1158 * @param output_filename the file to write the topology to
1159 * @param notify_cb callback to call upon completion or failure
1160 * @param notify_cb_cls closure for notify_cb
1164 GNUNET_TESTING_peergroup_topology_to_file (struct GNUNET_TESTING_PeerGroup *pg,
1165 const char *output_filename,
1166 GNUNET_TESTING_NotifyCompletion
1167 notify_cb, void *notify_cb_cls);
1170 #if 0 /* keep Emacsens' auto-indent happy */