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_EccPrivateKey)
54 * Handle for a system on which GNUnet peers are executed;
55 * a system is used for reserving unique paths and ports.
57 struct GNUNET_TESTING_System;
61 * Handle for a GNUnet peer controlled by testing.
63 struct GNUNET_TESTING_Peer;
67 * Specification of a service that is to be shared among peers
69 struct GNUNET_TESTING_SharedService
72 * The name of the service.
77 * The configuration template for the service. Cannot be NULL
79 const struct GNUNET_CONFIGURATION_Handle *cfg;
82 * The number of peers which share an instance of the service. 0 for sharing
90 * Create a system handle. There must only be one system handle per operating
91 * system. Uses a default range for allowed ports. Ports are still tested for
94 * @param testdir only the directory name without any path. This is used for all
95 * service homes; the directory will be created in a temporary location
96 * depending on the underlying OS. This variable will be
97 * overridden with the value of the environmental variable
98 * GNUNET_TESTING_PREFIX, if it exists.
99 * @param trusted_ip the ip address which will be set as TRUSTED HOST in all
100 * service configurations generated to allow control connections from
101 * this ip. This can either be a single ip address or a network address
103 * @param hostname the hostname of the system we are using for testing; NULL for
105 * @param shared_services NULL terminated array describing services that are to
106 * be shared among peers
107 * @return handle to this system, NULL on error
109 struct GNUNET_TESTING_System *
110 GNUNET_TESTING_system_create (const char *testdir,
111 const char *trusted_ip,
112 const char *hostname,
113 const struct GNUNET_TESTING_SharedService *
118 * Create a system handle. There must only be one system
119 * handle per operating system. Use this function directly
120 * if multiple system objects are created for the same host
121 * (only really useful when testing --- or to make the port
122 * range configureable).
124 * @param testdir only the directory name without any path. This is used for
125 * all service homes; the directory will be created in a temporary
126 * location depending on the underlying OS. This variable will be
127 * overridden with the value of the environmental variable
128 * GNUNET_TESTING_PREFIX, if it exists.
129 * @param trusted_ip the ip address which will be set as TRUSTED HOST in all
130 * service configurations generated to allow control connections from
131 * this ip. This can either be a single ip address or a network address
133 * @param hostname the hostname of the system we are using for testing; NULL for
135 * @param shared_services NULL terminated array describing services that are to
136 * be shared among peers
137 * @param lowport lowest port number this system is allowed to allocate (inclusive)
138 * @param highport highest port number this system is allowed to allocate (exclusive)
139 * @return handle to this system, NULL on error
141 struct GNUNET_TESTING_System *
142 GNUNET_TESTING_system_create_with_portrange (const char *testdir,
143 const char *trusted_ip,
144 const char *hostname,
146 GNUNET_TESTING_SharedService *
153 * Free system resources.
155 * @param system system to be freed
156 * @param remove_paths should the 'testdir' and all subdirectories
157 * be removed (clean up on shutdown)?
160 GNUNET_TESTING_system_destroy (struct GNUNET_TESTING_System *system,
165 * Testing includes a number of pre-created hostkeys for
166 * faster peer startup. This function can be used to
167 * access the n-th key of those pre-created hostkeys; note
168 * that these keys are ONLY useful for testing and not
169 * secure as the private keys are part of the public
170 * GNUnet source code.
172 * This is primarily a helper function used internally
173 * by 'GNUNET_TESTING_peer_configure'.
175 * @param system the testing system handle
176 * @param key_number desired pre-created hostkey to obtain
177 * @param id set to the peer's identity (hash of the public
178 * key; if NULL, GNUNET_SYSERR is returned immediately
179 * @return NULL on error (not enough keys)
181 struct GNUNET_CRYPTO_EccPrivateKey *
182 GNUNET_TESTING_hostkey_get (const struct GNUNET_TESTING_System *system,
184 struct GNUNET_PeerIdentity *id);
188 * Reserve a port for a peer.
190 * @param system system to use for reservation tracking
191 * @return 0 if no free port was available
194 GNUNET_TESTING_reserve_port (struct GNUNET_TESTING_System *system);
198 * Release reservation of a TCP or UDP port for a peer
199 * (used during GNUNET_TESTING_peer_destroy).
201 * @param system system to use for reservation tracking
202 * @param port reserved port to release
205 GNUNET_TESTING_release_port (struct GNUNET_TESTING_System *system,
210 * Create a new configuration using the given configuration as a template;
211 * ports and paths will be modified to select available ports on the local
212 * system. The default configuration will be available in PATHS section under
213 * the option DEFAULTCONFIG after the call. SERVICE_HOME is also set in PATHS
214 * section to the temporary directory specific to this configuration. If we run
215 * out of "*port" numbers, return SYSERR.
217 * This is primarily a helper function used internally
218 * by 'GNUNET_TESTING_peer_configure'.
220 * @param system system to use to coordinate resource usage
221 * @param cfg template configuration to update
222 * @return GNUNET_OK on success, GNUNET_SYSERR on error - the configuration will
223 * be incomplete and should not be used there upon
226 GNUNET_TESTING_configuration_create (struct GNUNET_TESTING_System *system,
227 struct GNUNET_CONFIGURATION_Handle *cfg);
228 // FIXME: add dual to 'release' ports again...
232 * Configure a GNUnet peer. GNUnet must be installed on the local
233 * system and available in the PATH.
235 * @param system system to use to coordinate resource usage
236 * @param cfg configuration to use; will be UPDATED (to reflect needed
237 * changes in port numbers and paths)
238 * @param key_number number of the hostkey to use for the peer
239 * @param id identifier for the daemon, will be set, can be NULL
240 * @param emsg set to freshly allocated error message (set to NULL on success),
242 * @return handle to the peer, NULL on error
244 struct GNUNET_TESTING_Peer *
245 GNUNET_TESTING_peer_configure (struct GNUNET_TESTING_System *system,
246 struct GNUNET_CONFIGURATION_Handle *cfg,
248 struct GNUNET_PeerIdentity *id,
253 * Obtain the peer identity from a peer handle.
255 * @param peer peer handle for which we want the peer's identity
256 * @param id identifier for the daemon, will be set
259 GNUNET_TESTING_peer_get_identity (struct GNUNET_TESTING_Peer *peer,
260 struct GNUNET_PeerIdentity *id);
266 * @param peer peer to start
267 * @return GNUNET_OK on success, GNUNET_SYSERR on error (i.e. peer already running)
270 GNUNET_TESTING_peer_start (struct GNUNET_TESTING_Peer *peer);
274 * Stop the peer. This call is blocking as it kills the peer's main ARM process
275 * by sending a SIGTERM and waits on it. For asynchronous shutdown of peer, see
276 * GNUNET_TESTING_peer_stop_async().
278 * @param peer peer to stop
279 * @return GNUNET_OK on success, GNUNET_SYSERR on error (i.e. peer not running)
282 GNUNET_TESTING_peer_stop (struct GNUNET_TESTING_Peer *peer);
286 * Destroy the peer. Releases resources locked during peer configuration.
287 * If the peer is still running, it will be stopped AND a warning will be
288 * printed (users of the API should stop the peer explicitly first).
290 * @param peer peer to destroy
293 GNUNET_TESTING_peer_destroy (struct GNUNET_TESTING_Peer *peer);
297 * Sends SIGTERM to the peer's main process
299 * @param peer the handle to the peer
300 * @return GNUNET_OK if successful; GNUNET_SYSERR if the main process is NULL
301 * or upon any error while sending SIGTERM
304 GNUNET_TESTING_peer_kill (struct GNUNET_TESTING_Peer *peer);
308 * Waits for a peer to terminate. The peer's main process will also be destroyed.
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 waiting
315 GNUNET_TESTING_peer_wait (struct GNUNET_TESTING_Peer *peer);
319 * Callback to inform whether the peer is running or stopped.
321 * @param cls the closure given to GNUNET_TESTING_peer_stop_async()
322 * @param peer the respective peer whose status is being reported
323 * @param success GNUNET_YES if the peer is stopped; GNUNET_SYSERR upon any
326 typedef void (*GNUNET_TESTING_PeerStopCallback) (void *cls,
327 struct GNUNET_TESTING_Peer *
333 * Stop a peer asynchronously using ARM API. Peer's shutdown is signaled
334 * through the GNUNET_TESTING_PeerStopCallback().
336 * @param peer the peer to stop
337 * @param cb the callback to signal peer shutdown
338 * @param cb_cls closure for the above callback
339 * @return GNUNET_OK upon successfully giving the request to the ARM API (this
340 * does not mean that the peer is successfully stopped); GNUNET_SYSERR
344 GNUNET_TESTING_peer_stop_async (struct GNUNET_TESTING_Peer *peer,
345 GNUNET_TESTING_PeerStopCallback cb,
350 * Cancel a previous asynchronous peer stop request.
351 * GNUNET_TESTING_peer_stop_async() should have been called before on the given
352 * peer. It is an error to call this function if the peer stop callback was
355 * @param peer the peer on which GNUNET_TESTING_peer_stop_async() was called
359 GNUNET_TESTING_peer_stop_async_cancel (struct GNUNET_TESTING_Peer *peer);
363 * Signature of the 'main' function for a (single-peer) testcase that
364 * is run using 'GNUNET_TESTING_peer_run'.
367 * @param cfg configuration of the peer that was started
368 * @param peer identity of the peer that was created
370 typedef void (*GNUNET_TESTING_TestMain) (void *cls,
371 const struct GNUNET_CONFIGURATION_Handle *cfg,
372 struct GNUNET_TESTING_Peer *peer);
376 * Start a single peer and run a test using the testing library.
377 * Starts a peer using the given configuration and then invokes the
378 * given callback. This function ALSO initializes the scheduler loop
379 * and should thus be called directly from "main". The testcase
380 * should self-terminate by invoking 'GNUNET_SCHEDULER_shutdown'.
382 * @param testdir only the directory name without any path. This is used for
383 * all service homes; the directory will be created in a temporary
384 * location depending on the underlying OS
385 * @param cfgfilename name of the configuration file to use;
386 * use NULL to only run with defaults
387 * @param tm main function of the testcase
388 * @param tm_cls closure for 'tm'
389 * @return 0 on success, 1 on error
392 GNUNET_TESTING_peer_run (const char *testdir,
393 const char *cfgfilename,
394 GNUNET_TESTING_TestMain tm,
399 * Start a single service (no ARM, except of course if the given
400 * service name is 'arm') and run a test using the testing library.
401 * Starts a service using the given configuration and then invokes the
402 * given callback. This function ALSO initializes the scheduler loop
403 * and should thus be called directly from "main". The testcase
404 * should self-terminate by invoking 'GNUNET_SCHEDULER_shutdown'.
406 * This function is useful if the testcase is for a single service
407 * and if that service doesn't itself depend on other services.
409 * @param testdir only the directory name without any path. This is used for
410 * all service homes; the directory will be created in a temporary
411 * location depending on the underlying OS
412 * @param service_name name of the service to run
413 * @param cfgfilename name of the configuration file to use;
414 * use NULL to only run with defaults
415 * @param tm main function of the testcase
416 * @param tm_cls closure for 'tm'
417 * @return 0 on success, 1 on error
420 GNUNET_TESTING_service_run (const char *testdir,
421 const char *service_name,
422 const char *cfgfilename,
423 GNUNET_TESTING_TestMain tm,
428 * Sometimes we use the binary name to determine which specific
429 * test to run. In those cases, the string after the last "_"
430 * in 'argv[0]' specifies a string that determines the configuration
431 * file or plugin to use.
433 * This function returns the respective substring, taking care
434 * of issues such as binaries ending in '.exe' on W32.
436 * @param argv0 the name of the binary
437 * @return string between the last '_' and the '.exe' (or the end of the string),
438 * NULL if argv0 has no '_'
441 GNUNET_TESTING_get_testname_from_underscore (const char *argv0);
444 #if 0 /* keep Emacsens' auto-indent happy */