2 This file is part of GNUnet
3 (C) 2008, 2009, 2012 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
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13 General Public License for more details.
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22 * @file include/gnunet_testing_lib.h
23 * @brief convenience API for writing testcases for GNUnet;
24 * can start/stop one or more peers on a system;
25 * testing is responsible for managing private keys,
26 * ports and paths; it is a low-level library that
27 * does not support higher-level functions such as
28 * P2P connection, topology management or distributed
29 * testbed maintenance (those are in gnunet_testbed_service.h)
30 * @author Christian Grothoff
33 #ifndef GNUNET_TESTING_LIB_H
34 #define GNUNET_TESTING_LIB_H
36 #include "gnunet_util_lib.h"
37 #include "gnunet_statistics_service.h"
38 #include "gnunet_arm_service.h"
43 #if 0 /* keep Emacsens' auto-indent happy */
49 * Size of each hostkey in the hostkey file (in BYTES).
51 #define GNUNET_TESTING_HOSTKEYFILESIZE sizeof (struct GNUNET_CRYPTO_EddsaPrivateKey)
54 * The environmental variable, if set, that dictates where testing should place
55 * generated peer configurations
57 #define GNUNET_TESTING_PREFIX "GNUNET_TESTING_PREFIX"
61 * Handle for a system on which GNUnet peers are executed;
62 * a system is used for reserving unique paths and ports.
64 struct GNUNET_TESTING_System;
68 * Handle for a GNUnet peer controlled by testing.
70 struct GNUNET_TESTING_Peer;
74 * Specification of a service that is to be shared among peers
76 struct GNUNET_TESTING_SharedService
79 * The name of the service.
84 * The configuration template for the service. Cannot be NULL
86 const struct GNUNET_CONFIGURATION_Handle *cfg;
89 * The number of peers which share an instance of the service. 0 for sharing
97 * Create a system handle. There must only be one system handle per operating
98 * system. Uses a default range for allowed ports. Ports are still tested for
101 * @param testdir only the directory name without any path. This is used for all
102 * service homes; the directory will be created in a temporary location
103 * depending on the underlying OS. This variable will be
104 * overridden with the value of the environmental variable
105 * GNUNET_TESTING_PREFIX, if it exists.
106 * @param trusted_ip the ip address which will be set as TRUSTED HOST in all
107 * service configurations generated to allow control connections from
108 * this ip. This can either be a single ip address or a network address
110 * @param hostname the hostname of the system we are using for testing; NULL for
112 * @param shared_services NULL terminated array describing services that are to
113 * be shared among peers
114 * @return handle to this system, NULL on error
116 struct GNUNET_TESTING_System *
117 GNUNET_TESTING_system_create (const char *testdir,
118 const char *trusted_ip,
119 const char *hostname,
120 const struct GNUNET_TESTING_SharedService *
125 * Create a system handle. There must only be one system
126 * handle per operating system. Use this function directly
127 * if multiple system objects are created for the same host
128 * (only really useful when testing --- or to make the port
129 * range configureable).
131 * @param testdir only the directory name without any path. This is used for
132 * all service homes; the directory will be created in a temporary
133 * location depending on the underlying OS. This variable will be
134 * overridden with the value of the environmental variable
135 * GNUNET_TESTING_PREFIX, if it exists.
136 * @param trusted_ip the ip address which will be set as TRUSTED HOST in all
137 * service configurations generated to allow control connections from
138 * this ip. This can either be a single ip address or a network address
140 * @param hostname the hostname of the system we are using for testing; NULL for
142 * @param shared_services NULL terminated array describing services that are to
143 * be shared among peers
144 * @param lowport lowest port number this system is allowed to allocate (inclusive)
145 * @param highport highest port number this system is allowed to allocate (exclusive)
146 * @return handle to this system, NULL on error
148 struct GNUNET_TESTING_System *
149 GNUNET_TESTING_system_create_with_portrange (const char *testdir,
150 const char *trusted_ip,
151 const char *hostname,
153 GNUNET_TESTING_SharedService *
160 * Free system resources.
162 * @param system system to be freed
163 * @param remove_paths should the 'testdir' and all subdirectories
164 * be removed (clean up on shutdown)?
167 GNUNET_TESTING_system_destroy (struct GNUNET_TESTING_System *system,
172 * Testing includes a number of pre-created hostkeys for
173 * faster peer startup. This function can be used to
174 * access the n-th key of those pre-created hostkeys; note
175 * that these keys are ONLY useful for testing and not
176 * secure as the private keys are part of the public
177 * GNUnet source code.
179 * This is primarily a helper function used internally
180 * by 'GNUNET_TESTING_peer_configure'.
182 * @param system the testing system handle
183 * @param key_number desired pre-created hostkey to obtain
184 * @param id set to the peer's identity (hash of the public
185 * key; if NULL, GNUNET_SYSERR is returned immediately
186 * @return NULL on error (not enough keys)
188 struct GNUNET_CRYPTO_EddsaPrivateKey *
189 GNUNET_TESTING_hostkey_get (const struct GNUNET_TESTING_System *system,
191 struct GNUNET_PeerIdentity *id);
195 * Reserve a port for a peer.
197 * @param system system to use for reservation tracking
198 * @return 0 if no free port was available
201 GNUNET_TESTING_reserve_port (struct GNUNET_TESTING_System *system);
205 * Release reservation of a TCP or UDP port for a peer
206 * (used during GNUNET_TESTING_peer_destroy).
208 * @param system system to use for reservation tracking
209 * @param port reserved port to release
212 GNUNET_TESTING_release_port (struct GNUNET_TESTING_System *system,
217 * Create a new configuration using the given configuration as a template;
218 * ports and paths will be modified to select available ports on the local
219 * system. The default configuration will be available in PATHS section under
220 * the option DEFAULTCONFIG after the call. SERVICE_HOME is also set in PATHS
221 * section to the temporary directory specific to this configuration. If we run
222 * out of "*port" numbers, return SYSERR.
224 * This is primarily a helper function used internally
225 * by 'GNUNET_TESTING_peer_configure'.
227 * @param system system to use to coordinate resource usage
228 * @param cfg template configuration to update
229 * @return GNUNET_OK on success, GNUNET_SYSERR on error - the configuration will
230 * be incomplete and should not be used there upon
233 GNUNET_TESTING_configuration_create (struct GNUNET_TESTING_System *system,
234 struct GNUNET_CONFIGURATION_Handle *cfg);
235 // FIXME: add dual to 'release' ports again...
239 * Configure a GNUnet peer. GNUnet must be installed on the local
240 * system and available in the PATH.
242 * @param system system to use to coordinate resource usage
243 * @param cfg configuration to use; will be UPDATED (to reflect needed
244 * changes in port numbers and paths)
245 * @param key_number number of the hostkey to use for the peer
246 * @param id identifier for the daemon, will be set, can be NULL
247 * @param emsg set to freshly allocated error message (set to NULL on success),
249 * @return handle to the peer, NULL on error
251 struct GNUNET_TESTING_Peer *
252 GNUNET_TESTING_peer_configure (struct GNUNET_TESTING_System *system,
253 struct GNUNET_CONFIGURATION_Handle *cfg,
255 struct GNUNET_PeerIdentity *id,
260 * Obtain the peer identity from a peer handle.
262 * @param peer peer handle for which we want the peer's identity
263 * @param id identifier for the daemon, will be set
266 GNUNET_TESTING_peer_get_identity (struct GNUNET_TESTING_Peer *peer,
267 struct GNUNET_PeerIdentity *id);
273 * @param peer peer to start
274 * @return GNUNET_OK on success, GNUNET_SYSERR on error (i.e. peer already running)
277 GNUNET_TESTING_peer_start (struct GNUNET_TESTING_Peer *peer);
281 * Stop the peer. This call is blocking as it kills the peer's main ARM process
282 * by sending a SIGTERM and waits on it. For asynchronous shutdown of peer, see
283 * GNUNET_TESTING_peer_stop_async().
285 * @param peer peer to stop
286 * @return GNUNET_OK on success, GNUNET_SYSERR on error (i.e. peer not running)
289 GNUNET_TESTING_peer_stop (struct GNUNET_TESTING_Peer *peer);
293 * Destroy the peer. Releases resources locked during peer configuration.
294 * If the peer is still running, it will be stopped AND a warning will be
295 * printed (users of the API should stop the peer explicitly first).
297 * @param peer peer to destroy
300 GNUNET_TESTING_peer_destroy (struct GNUNET_TESTING_Peer *peer);
304 * Sends SIGTERM to the peer's main process
306 * @param peer the handle to the peer
307 * @return GNUNET_OK if successful; GNUNET_SYSERR if the main process is NULL
308 * or upon any error while sending SIGTERM
311 GNUNET_TESTING_peer_kill (struct GNUNET_TESTING_Peer *peer);
315 * Waits for a peer to terminate. The peer's main process will also be destroyed.
317 * @param peer the handle to the peer
318 * @return GNUNET_OK if successful; GNUNET_SYSERR if the main process is NULL
319 * or upon any error while waiting
322 GNUNET_TESTING_peer_wait (struct GNUNET_TESTING_Peer *peer);
326 * Callback to inform whether the peer is running or stopped.
328 * @param cls the closure given to GNUNET_TESTING_peer_stop_async()
329 * @param peer the respective peer whose status is being reported
330 * @param success GNUNET_YES if the peer is stopped; GNUNET_SYSERR upon any
333 typedef void (*GNUNET_TESTING_PeerStopCallback) (void *cls,
334 struct GNUNET_TESTING_Peer *
340 * Stop a peer asynchronously using ARM API. Peer's shutdown is signaled
341 * through the GNUNET_TESTING_PeerStopCallback().
343 * @param peer the peer to stop
344 * @param cb the callback to signal peer shutdown
345 * @param cb_cls closure for the above callback
346 * @return GNUNET_OK upon successfully giving the request to the ARM API (this
347 * does not mean that the peer is successfully stopped); GNUNET_SYSERR
351 GNUNET_TESTING_peer_stop_async (struct GNUNET_TESTING_Peer *peer,
352 GNUNET_TESTING_PeerStopCallback cb,
357 * Cancel a previous asynchronous peer stop request.
358 * GNUNET_TESTING_peer_stop_async() should have been called before on the given
359 * peer. It is an error to call this function if the peer stop callback was
362 * @param peer the peer on which GNUNET_TESTING_peer_stop_async() was called
366 GNUNET_TESTING_peer_stop_async_cancel (struct GNUNET_TESTING_Peer *peer);
370 * Signature of the 'main' function for a (single-peer) testcase that
371 * is run using 'GNUNET_TESTING_peer_run'.
374 * @param cfg configuration of the peer that was started
375 * @param peer identity of the peer that was created
377 typedef void (*GNUNET_TESTING_TestMain) (void *cls,
378 const struct GNUNET_CONFIGURATION_Handle *cfg,
379 struct GNUNET_TESTING_Peer *peer);
383 * Start a single peer and run a test using the testing library.
384 * Starts a peer using the given configuration and then invokes the
385 * given callback. This function ALSO initializes the scheduler loop
386 * and should thus be called directly from "main". The testcase
387 * should self-terminate by invoking 'GNUNET_SCHEDULER_shutdown'.
389 * @param testdir only the directory name without any path. This is used for
390 * all service homes; the directory will be created in a temporary
391 * location depending on the underlying OS
392 * @param cfgfilename name of the configuration file to use;
393 * use NULL to only run with defaults
394 * @param tm main function of the testcase
395 * @param tm_cls closure for 'tm'
396 * @return 0 on success, 1 on error
399 GNUNET_TESTING_peer_run (const char *testdir,
400 const char *cfgfilename,
401 GNUNET_TESTING_TestMain tm,
406 * Start a single service (no ARM, except of course if the given
407 * service name is 'arm') and run a test using the testing library.
408 * Starts a service using the given configuration and then invokes the
409 * given callback. This function ALSO initializes the scheduler loop
410 * and should thus be called directly from "main". The testcase
411 * should self-terminate by invoking 'GNUNET_SCHEDULER_shutdown'.
413 * This function is useful if the testcase is for a single service
414 * and if that service doesn't itself depend on other services.
416 * @param testdir only the directory name without any path. This is used for
417 * all service homes; the directory will be created in a temporary
418 * location depending on the underlying OS
419 * @param service_name name of the service to run
420 * @param cfgfilename name of the configuration file to use;
421 * use NULL to only run with defaults
422 * @param tm main function of the testcase
423 * @param tm_cls closure for 'tm'
424 * @return 0 on success, 1 on error
427 GNUNET_TESTING_service_run (const char *testdir,
428 const char *service_name,
429 const char *cfgfilename,
430 GNUNET_TESTING_TestMain tm,
435 * Sometimes we use the binary name to determine which specific
436 * test to run. In those cases, the string after the last "_"
437 * in 'argv[0]' specifies a string that determines the configuration
438 * file or plugin to use.
440 * This function returns the respective substring, taking care
441 * of issues such as binaries ending in '.exe' on W32.
443 * @param argv0 the name of the binary
444 * @return string between the last '_' and the '.exe' (or the end of the string),
445 * NULL if argv0 has no '_'
448 GNUNET_TESTING_get_testname_from_underscore (const char *argv0);
451 #if 0 /* keep Emacsens' auto-indent happy */