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3 Copyright (C) 2008, 2009, 2012 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
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17 * @author Christian Grothoff
20 * Convenience API for writing testcases for GNUnet
22 * @defgroup testing Testing library
23 * Library for writing testcases for GNUnet.
25 * It can start/stop one or more peers on a system; testing is responsible for
26 * managing private keys, ports and paths; it is a low-level library that does
27 * not support higher-level functions such as P2P connection, topology
28 * management or distributed testbed maintenance (those are provided by the
29 * [Testbed service](@ref testbed))
31 * @see [Documentation](https://gnunet.org/writing_testcases)
36 #ifndef GNUNET_TESTING_LIB_H
37 #define GNUNET_TESTING_LIB_H
39 #include "gnunet_util_lib.h"
40 #include "gnunet_statistics_service.h"
41 #include "gnunet_arm_service.h"
46 #if 0 /* keep Emacsens' auto-indent happy */
52 * Size of each hostkey in the hostkey file (in BYTES).
54 #define GNUNET_TESTING_HOSTKEYFILESIZE sizeof (struct GNUNET_CRYPTO_EddsaPrivateKey)
57 * The environmental variable, if set, that dictates where testing should place
58 * generated peer configurations
60 #define GNUNET_TESTING_PREFIX "GNUNET_TESTING_PREFIX"
64 * Handle for a system on which GNUnet peers are executed;
65 * a system is used for reserving unique paths and ports.
67 struct GNUNET_TESTING_System;
71 * Handle for a GNUnet peer controlled by testing.
73 struct GNUNET_TESTING_Peer;
77 * Specification of a service that is to be shared among peers
79 struct GNUNET_TESTING_SharedService
82 * The name of the service.
87 * The configuration template for the service. Cannot be NULL
89 const struct GNUNET_CONFIGURATION_Handle *cfg;
92 * The number of peers which share an instance of the service. 0 for sharing
100 * Create a system handle. There must only be one system handle per operating
101 * system. Uses a default range for allowed ports. Ports are still tested for
104 * @param testdir only the directory name without any path. This is used for all
105 * service homes; the directory will be created in a temporary location
106 * depending on the underlying OS. This variable will be
107 * overridden with the value of the environmental variable
108 * GNUNET_TESTING_PREFIX, if it exists.
109 * @param trusted_ip the ip address which will be set as TRUSTED HOST in all
110 * service configurations generated to allow control connections from
111 * this ip. This can either be a single ip address or a network address
113 * @param hostname the hostname of the system we are using for testing; NULL for
115 * @param shared_services NULL terminated array describing services that are to
116 * be shared among peers
117 * @return handle to this system, NULL on error
119 struct GNUNET_TESTING_System *
120 GNUNET_TESTING_system_create (const char *testdir,
121 const char *trusted_ip,
122 const char *hostname,
123 const struct GNUNET_TESTING_SharedService *
128 * Create a system handle. There must only be one system
129 * handle per operating system. Use this function directly
130 * if multiple system objects are created for the same host
131 * (only really useful when testing --- or to make the port
132 * range configureable).
134 * @param testdir only the directory name without any path. This is used for
135 * all service homes; the directory will be created in a temporary
136 * location depending on the underlying OS. This variable will be
137 * overridden with the value of the environmental variable
138 * GNUNET_TESTING_PREFIX, if it exists.
139 * @param trusted_ip the ip address which will be set as TRUSTED HOST in all
140 * service configurations generated to allow control connections from
141 * this ip. This can either be a single ip address or a network address
143 * @param hostname the hostname of the system we are using for testing; NULL for
145 * @param shared_services NULL terminated array describing services that are to
146 * be shared among peers
147 * @param lowport lowest port number this system is allowed to allocate (inclusive)
148 * @param highport highest port number this system is allowed to allocate (exclusive)
149 * @return handle to this system, NULL on error
151 struct GNUNET_TESTING_System *
152 GNUNET_TESTING_system_create_with_portrange (const char *testdir,
153 const char *trusted_ip,
154 const char *hostname,
155 const struct GNUNET_TESTING_SharedService *shared_services,
161 * Free system resources.
163 * @param system system to be freed
164 * @param remove_paths should the 'testdir' and all subdirectories
165 * be removed (clean up on shutdown)?
168 GNUNET_TESTING_system_destroy (struct GNUNET_TESTING_System *system,
173 * Testing includes a number of pre-created hostkeys for
174 * faster peer startup. This function can be used to
175 * access the n-th key of those pre-created hostkeys; note
176 * that these keys are ONLY useful for testing and not
177 * secure as the private keys are part of the public
178 * GNUnet source code.
180 * This is primarily a helper function used internally
181 * by #GNUNET_TESTING_peer_configure().
183 * @param system the testing system handle
184 * @param key_number desired pre-created hostkey to obtain
185 * @param id set to the peer's identity (hash of the public
186 * key; if NULL, #GNUNET_SYSERR is returned immediately
187 * @return NULL on error (not enough keys)
189 struct GNUNET_CRYPTO_EddsaPrivateKey *
190 GNUNET_TESTING_hostkey_get (const struct GNUNET_TESTING_System *system,
192 struct GNUNET_PeerIdentity *id);
196 * Reserve a port for a peer.
198 * @param system system to use for reservation tracking
199 * @return 0 if no free port was available
202 GNUNET_TESTING_reserve_port (struct GNUNET_TESTING_System *system);
206 * Release reservation of a TCP or UDP port for a peer
207 * (used during GNUNET_TESTING_peer_destroy).
209 * @param system system to use for reservation tracking
210 * @param port reserved port to release
213 GNUNET_TESTING_release_port (struct GNUNET_TESTING_System *system,
218 * Create a new configuration using the given configuration as a template;
219 * ports and paths will be modified to select available ports on the local
220 * system. The default configuration will be available in PATHS section under
221 * the option DEFAULTCONFIG after the call. SERVICE_HOME is also set in PATHS
222 * section to the temporary directory specific to this configuration. If we run
223 * out of "*port" numbers, return #GNUNET_SYSERR.
225 * This is primarily a helper function used internally
226 * by #GNUNET_TESTING_peer_configure().
228 * @param system system to use to coordinate resource usage
229 * @param cfg template configuration to update
230 * @return #GNUNET_OK on success,
231 * #GNUNET_SYSERR on error - the configuration will
232 * be incomplete and should not be used there upon
235 GNUNET_TESTING_configuration_create (struct GNUNET_TESTING_System *system,
236 struct GNUNET_CONFIGURATION_Handle *cfg);
237 // FIXME: add dual to 'release' ports again...
241 * Configure a GNUnet peer. GNUnet must be installed on the local
242 * system and available in the PATH.
244 * @param system system to use to coordinate resource usage
245 * @param cfg configuration to use; will be UPDATED (to reflect needed
246 * changes in port numbers and paths)
247 * @param key_number number of the hostkey to use for the peer
248 * @param id identifier for the daemon, will be set, can be NULL
249 * @param emsg set to freshly allocated error message (set to NULL on success),
251 * @return handle to the peer, NULL on error
253 struct GNUNET_TESTING_Peer *
254 GNUNET_TESTING_peer_configure (struct GNUNET_TESTING_System *system,
255 struct GNUNET_CONFIGURATION_Handle *cfg,
257 struct GNUNET_PeerIdentity *id,
262 * Obtain the peer identity from a peer handle.
264 * @param peer peer handle for which we want the peer's identity
265 * @param id identifier for the daemon, will be set
268 GNUNET_TESTING_peer_get_identity (struct GNUNET_TESTING_Peer *peer,
269 struct GNUNET_PeerIdentity *id);
275 * @param peer peer to start
276 * @return #GNUNET_OK on success,
277 * #GNUNET_SYSERR on error (i.e. peer already running)
280 GNUNET_TESTING_peer_start (struct GNUNET_TESTING_Peer *peer);
284 * Stop the peer. This call is blocking as it kills the peer's main ARM process
285 * by sending a SIGTERM and waits on it. For asynchronous shutdown of peer, see
286 * GNUNET_TESTING_peer_stop_async().
288 * @param peer peer to stop
289 * @return #GNUNET_OK on success,
290 * #GNUNET_SYSERR on error (i.e. peer not running)
293 GNUNET_TESTING_peer_stop (struct GNUNET_TESTING_Peer *peer);
297 * Destroy the peer. Releases resources locked during peer configuration.
298 * If the peer is still running, it will be stopped AND a warning will be
299 * printed (users of the API should stop the peer explicitly first).
301 * @param peer peer to destroy
304 GNUNET_TESTING_peer_destroy (struct GNUNET_TESTING_Peer *peer);
308 * Sends SIGTERM to the peer's main process
310 * @param peer the handle to the peer
311 * @return #GNUNET_OK if successful; #GNUNET_SYSERR if the main process is NULL
312 * or upon any error while sending SIGTERM
315 GNUNET_TESTING_peer_kill (struct GNUNET_TESTING_Peer *peer);
319 * Waits for a peer to terminate. The peer's main process will also be destroyed.
321 * @param peer the handle to the peer
322 * @return #GNUNET_OK if successful; #GNUNET_SYSERR if the main process is NULL
323 * or upon any error while waiting
326 GNUNET_TESTING_peer_wait (struct GNUNET_TESTING_Peer *peer);
330 * Callback to inform whether the peer is running or stopped.
332 * @param cls the closure given to GNUNET_TESTING_peer_stop_async()
333 * @param peer the respective peer whose status is being reported
334 * @param success #GNUNET_YES if the peer is stopped; #GNUNET_SYSERR upon any
338 (*GNUNET_TESTING_PeerStopCallback) (void *cls,
339 struct GNUNET_TESTING_Peer *peer,
344 * Stop a peer asynchronously using ARM API. Peer's shutdown is signaled
345 * through the GNUNET_TESTING_PeerStopCallback().
347 * @param peer the peer to stop
348 * @param cb the callback to signal peer shutdown
349 * @param cb_cls closure for the @a cb
350 * @return #GNUNET_OK upon successfully giving the request to the ARM API (this
351 * does not mean that the peer is successfully stopped); #GNUNET_SYSERR
355 GNUNET_TESTING_peer_stop_async (struct GNUNET_TESTING_Peer *peer,
356 GNUNET_TESTING_PeerStopCallback cb,
361 * Cancel a previous asynchronous peer stop request.
362 * GNUNET_TESTING_peer_stop_async() should have been called before on the given
363 * peer. It is an error to call this function if the peer stop callback was
366 * @param peer the peer on which GNUNET_TESTING_peer_stop_async() was called
370 GNUNET_TESTING_peer_stop_async_cancel (struct GNUNET_TESTING_Peer *peer);
374 * Signature of the 'main' function for a (single-peer) testcase that
375 * is run using #GNUNET_TESTING_peer_run().
378 * @param cfg configuration of the peer that was started
379 * @param peer identity of the peer that was created
382 (*GNUNET_TESTING_TestMain) (void *cls,
383 const struct GNUNET_CONFIGURATION_Handle *cfg,
384 struct GNUNET_TESTING_Peer *peer);
388 * Start a single peer and run a test using the testing library.
389 * Starts a peer using the given configuration and then invokes the
390 * given callback. This function ALSO initializes the scheduler loop
391 * and should thus be called directly from "main". The testcase
392 * should self-terminate by invoking 'GNUNET_SCHEDULER_shutdown'.
394 * @param testdir only the directory name without any path. This is used for
395 * all service homes; the directory will be created in a temporary
396 * location depending on the underlying OS
397 * @param cfgfilename name of the configuration file to use;
398 * use NULL to only run with defaults
399 * @param tm main function of the testcase
400 * @param tm_cls closure for 'tm'
401 * @return 0 on success, 1 on error
404 GNUNET_TESTING_peer_run (const char *testdir,
405 const char *cfgfilename,
406 GNUNET_TESTING_TestMain tm,
411 * Start a single service (no ARM, except of course if the given
412 * service name is 'arm') and run a test using the testing library.
413 * Starts a service using the given configuration and then invokes the
414 * given callback. This function ALSO initializes the scheduler loop
415 * and should thus be called directly from "main". The testcase
416 * should self-terminate by invoking 'GNUNET_SCHEDULER_shutdown'.
418 * This function is useful if the testcase is for a single service
419 * and if that service doesn't itself depend on other services.
421 * @param testdir only the directory name without any path. This is used for
422 * all service homes; the directory will be created in a temporary
423 * location depending on the underlying OS
424 * @param service_name name of the service to run
425 * @param cfgfilename name of the configuration file to use;
426 * use NULL to only run with defaults
427 * @param tm main function of the testcase
428 * @param tm_cls closure for @a tm
429 * @return 0 on success, 1 on error
432 GNUNET_TESTING_service_run (const char *testdir,
433 const char *service_name,
434 const char *cfgfilename,
435 GNUNET_TESTING_TestMain tm,
440 * Sometimes we use the binary name to determine which specific
441 * test to run. In those cases, the string after the last "_"
442 * in 'argv[0]' specifies a string that determines the configuration
443 * file or plugin to use.
445 * This function returns the respective substring, taking care
446 * of issues such as binaries ending in '.exe' on W32.
448 * @param argv0 the name of the binary
449 * @return string between the last '_' and the '.exe' (or the end of the string),
450 * NULL if argv0 has no '_'
453 GNUNET_TESTING_get_testname_from_underscore (const char *argv0);
456 #if 0 /* keep Emacsens' auto-indent happy */
465 /** @} */ /* end of group */