/* This file is part of GNUnet Copyright (C) 2008, 2009, 2012 GNUnet e.V. GNUnet is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. GNUnet is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. */ /** * @author Christian Grothoff * * @file * Convenience API for writing testcases for GNUnet * * @defgroup testing Testing library * Library for writing testcases for GNUnet. * * It can start/stop one or more peers on a system; testing is responsible for * managing private keys, ports and paths; it is a low-level library that does * not support higher-level functions such as P2P connection, topology * management or distributed testbed maintenance (those are provided by the * [Testbed service](@ref testbed)) * * @see [Documentation](https://gnunet.org/writing_testcases) * * @{ */ #ifndef GNUNET_TESTING_LIB_H #define GNUNET_TESTING_LIB_H #include "gnunet_util_lib.h" #include "gnunet_statistics_service.h" #include "gnunet_arm_service.h" #ifdef __cplusplus extern "C" { #if 0 /* keep Emacsens' auto-indent happy */ } #endif #endif /** * Size of each hostkey in the hostkey file (in BYTES). */ #define GNUNET_TESTING_HOSTKEYFILESIZE sizeof (struct GNUNET_CRYPTO_EddsaPrivateKey) /** * The environmental variable, if set, that dictates where testing should place * generated peer configurations */ #define GNUNET_TESTING_PREFIX "GNUNET_TESTING_PREFIX" /** * Handle for a system on which GNUnet peers are executed; * a system is used for reserving unique paths and ports. */ struct GNUNET_TESTING_System; /** * Handle for a GNUnet peer controlled by testing. */ struct GNUNET_TESTING_Peer; /** * Specification of a service that is to be shared among peers */ struct GNUNET_TESTING_SharedService { /** * The name of the service. */ const char *service; /** * The configuration template for the service. Cannot be NULL */ const struct GNUNET_CONFIGURATION_Handle *cfg; /** * The number of peers which share an instance of the service. 0 for sharing * among all peers */ unsigned int share; }; /** * Create a system handle. There must only be one system handle per operating * system. Uses a default range for allowed ports. Ports are still tested for * availability. * * @param testdir only the directory name without any path. This is used for all * service homes; the directory will be created in a temporary location * depending on the underlying OS. This variable will be * overridden with the value of the environmental variable * GNUNET_TESTING_PREFIX, if it exists. * @param trusted_ip the ip address which will be set as TRUSTED HOST in all * service configurations generated to allow control connections from * this ip. This can either be a single ip address or a network address * in CIDR notation. * @param hostname the hostname of the system we are using for testing; NULL for * localhost * @param shared_services NULL terminated array describing services that are to * be shared among peers * @return handle to this system, NULL on error */ struct GNUNET_TESTING_System * GNUNET_TESTING_system_create (const char *testdir, const char *trusted_ip, const char *hostname, const struct GNUNET_TESTING_SharedService * shared_services); /** * Create a system handle. There must only be one system * handle per operating system. Use this function directly * if multiple system objects are created for the same host * (only really useful when testing --- or to make the port * range configureable). * * @param testdir only the directory name without any path. This is used for * all service homes; the directory will be created in a temporary * location depending on the underlying OS. This variable will be * overridden with the value of the environmental variable * GNUNET_TESTING_PREFIX, if it exists. * @param trusted_ip the ip address which will be set as TRUSTED HOST in all * service configurations generated to allow control connections from * this ip. This can either be a single ip address or a network address * in CIDR notation. * @param hostname the hostname of the system we are using for testing; NULL for * localhost * @param shared_services NULL terminated array describing services that are to * be shared among peers * @param lowport lowest port number this system is allowed to allocate (inclusive) * @param highport highest port number this system is allowed to allocate (exclusive) * @return handle to this system, NULL on error */ struct GNUNET_TESTING_System * GNUNET_TESTING_system_create_with_portrange (const char *testdir, const char *trusted_ip, const char *hostname, const struct GNUNET_TESTING_SharedService *shared_services, uint16_t lowport, uint16_t highport); /** * Free system resources. * * @param system system to be freed * @param remove_paths should the 'testdir' and all subdirectories * be removed (clean up on shutdown)? */ void GNUNET_TESTING_system_destroy (struct GNUNET_TESTING_System *system, int remove_paths); /** * Testing includes a number of pre-created hostkeys for * faster peer startup. This function can be used to * access the n-th key of those pre-created hostkeys; note * that these keys are ONLY useful for testing and not * secure as the private keys are part of the public * GNUnet source code. * * This is primarily a helper function used internally * by #GNUNET_TESTING_peer_configure(). * * @param system the testing system handle * @param key_number desired pre-created hostkey to obtain * @param id set to the peer's identity (hash of the public * key; if NULL, #GNUNET_SYSERR is returned immediately * @return NULL on error (not enough keys) */ struct GNUNET_CRYPTO_EddsaPrivateKey * GNUNET_TESTING_hostkey_get (const struct GNUNET_TESTING_System *system, uint32_t key_number, struct GNUNET_PeerIdentity *id); /** * Reserve a port for a peer. * * @param system system to use for reservation tracking * @return 0 if no free port was available */ uint16_t GNUNET_TESTING_reserve_port (struct GNUNET_TESTING_System *system); /** * Release reservation of a TCP or UDP port for a peer * (used during GNUNET_TESTING_peer_destroy). * * @param system system to use for reservation tracking * @param port reserved port to release */ void GNUNET_TESTING_release_port (struct GNUNET_TESTING_System *system, uint16_t port); /** * Create a new configuration using the given configuration as a template; * ports and paths will be modified to select available ports on the local * system. The default configuration will be available in PATHS section under * the option DEFAULTCONFIG after the call. SERVICE_HOME is also set in PATHS * section to the temporary directory specific to this configuration. If we run * out of "*port" numbers, return #GNUNET_SYSERR. * * This is primarily a helper function used internally * by #GNUNET_TESTING_peer_configure(). * * @param system system to use to coordinate resource usage * @param cfg template configuration to update * @return #GNUNET_OK on success, * #GNUNET_SYSERR on error - the configuration will * be incomplete and should not be used there upon */ int GNUNET_TESTING_configuration_create (struct GNUNET_TESTING_System *system, struct GNUNET_CONFIGURATION_Handle *cfg); // FIXME: add dual to 'release' ports again... /** * Configure a GNUnet peer. GNUnet must be installed on the local * system and available in the PATH. * * @param system system to use to coordinate resource usage * @param cfg configuration to use; will be UPDATED (to reflect needed * changes in port numbers and paths) * @param key_number number of the hostkey to use for the peer * @param id identifier for the daemon, will be set, can be NULL * @param emsg set to freshly allocated error message (set to NULL on success), * can be NULL * @return handle to the peer, NULL on error */ struct GNUNET_TESTING_Peer * GNUNET_TESTING_peer_configure (struct GNUNET_TESTING_System *system, struct GNUNET_CONFIGURATION_Handle *cfg, uint32_t key_number, struct GNUNET_PeerIdentity *id, char **emsg); /** * Obtain the peer identity from a peer handle. * * @param peer peer handle for which we want the peer's identity * @param id identifier for the daemon, will be set */ void GNUNET_TESTING_peer_get_identity (struct GNUNET_TESTING_Peer *peer, struct GNUNET_PeerIdentity *id); /** * Start the peer. * * @param peer peer to start * @return #GNUNET_OK on success, * #GNUNET_SYSERR on error (i.e. peer already running) */ int GNUNET_TESTING_peer_start (struct GNUNET_TESTING_Peer *peer); /** * Stop the peer. This call is blocking as it kills the peer's main ARM process * by sending a SIGTERM and waits on it. For asynchronous shutdown of peer, see * GNUNET_TESTING_peer_stop_async(). * * @param peer peer to stop * @return #GNUNET_OK on success, * #GNUNET_SYSERR on error (i.e. peer not running) */ int GNUNET_TESTING_peer_stop (struct GNUNET_TESTING_Peer *peer); /** * Destroy the peer. Releases resources locked during peer configuration. * If the peer is still running, it will be stopped AND a warning will be * printed (users of the API should stop the peer explicitly first). * * @param peer peer to destroy */ void GNUNET_TESTING_peer_destroy (struct GNUNET_TESTING_Peer *peer); /** * Sends SIGTERM to the peer's main process * * @param peer the handle to the peer * @return #GNUNET_OK if successful; #GNUNET_SYSERR if the main process is NULL * or upon any error while sending SIGTERM */ int GNUNET_TESTING_peer_kill (struct GNUNET_TESTING_Peer *peer); /** * Waits for a peer to terminate. The peer's main process will also be destroyed. * * @param peer the handle to the peer * @return #GNUNET_OK if successful; #GNUNET_SYSERR if the main process is NULL * or upon any error while waiting */ int GNUNET_TESTING_peer_wait (struct GNUNET_TESTING_Peer *peer); /** * Callback to inform whether the peer is running or stopped. * * @param cls the closure given to GNUNET_TESTING_peer_stop_async() * @param peer the respective peer whose status is being reported * @param success #GNUNET_YES if the peer is stopped; #GNUNET_SYSERR upon any * error */ typedef void (*GNUNET_TESTING_PeerStopCallback) (void *cls, struct GNUNET_TESTING_Peer *peer, int success); /** * Stop a peer asynchronously using ARM API. Peer's shutdown is signaled * through the GNUNET_TESTING_PeerStopCallback(). * * @param peer the peer to stop * @param cb the callback to signal peer shutdown * @param cb_cls closure for the @a cb * @return #GNUNET_OK upon successfully giving the request to the ARM API (this * does not mean that the peer is successfully stopped); #GNUNET_SYSERR * upon any error. */ int GNUNET_TESTING_peer_stop_async (struct GNUNET_TESTING_Peer *peer, GNUNET_TESTING_PeerStopCallback cb, void *cb_cls); /** * Cancel a previous asynchronous peer stop request. * GNUNET_TESTING_peer_stop_async() should have been called before on the given * peer. It is an error to call this function if the peer stop callback was * already called * * @param peer the peer on which GNUNET_TESTING_peer_stop_async() was called * before. */ void GNUNET_TESTING_peer_stop_async_cancel (struct GNUNET_TESTING_Peer *peer); /** * Signature of the 'main' function for a (single-peer) testcase that * is run using #GNUNET_TESTING_peer_run(). * * @param cls closure * @param cfg configuration of the peer that was started * @param peer identity of the peer that was created */ typedef void (*GNUNET_TESTING_TestMain) (void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg, struct GNUNET_TESTING_Peer *peer); /** * Start a single peer and run a test using the testing library. * Starts a peer using the given configuration and then invokes the * given callback. This function ALSO initializes the scheduler loop * and should thus be called directly from "main". The testcase * should self-terminate by invoking 'GNUNET_SCHEDULER_shutdown'. * * @param testdir only the directory name without any path. This is used for * all service homes; the directory will be created in a temporary * location depending on the underlying OS * @param cfgfilename name of the configuration file to use; * use NULL to only run with defaults * @param tm main function of the testcase * @param tm_cls closure for 'tm' * @return 0 on success, 1 on error */ int GNUNET_TESTING_peer_run (const char *testdir, const char *cfgfilename, GNUNET_TESTING_TestMain tm, void *tm_cls); /** * Start a single service (no ARM, except of course if the given * service name is 'arm') and run a test using the testing library. * Starts a service using the given configuration and then invokes the * given callback. This function ALSO initializes the scheduler loop * and should thus be called directly from "main". The testcase * should self-terminate by invoking 'GNUNET_SCHEDULER_shutdown'. * * This function is useful if the testcase is for a single service * and if that service doesn't itself depend on other services. * * @param testdir only the directory name without any path. This is used for * all service homes; the directory will be created in a temporary * location depending on the underlying OS * @param service_name name of the service to run * @param cfgfilename name of the configuration file to use; * use NULL to only run with defaults * @param tm main function of the testcase * @param tm_cls closure for @a tm * @return 0 on success, 1 on error */ int GNUNET_TESTING_service_run (const char *testdir, const char *service_name, const char *cfgfilename, GNUNET_TESTING_TestMain tm, void *tm_cls); /** * Sometimes we use the binary name to determine which specific * test to run. In those cases, the string after the last "_" * in 'argv[0]' specifies a string that determines the configuration * file or plugin to use. * * This function returns the respective substring, taking care * of issues such as binaries ending in '.exe' on W32. * * @param argv0 the name of the binary * @return string between the last '_' and the '.exe' (or the end of the string), * NULL if argv0 has no '_' */ char * GNUNET_TESTING_get_testname_from_underscore (const char *argv0); #if 0 /* keep Emacsens' auto-indent happy */ { #endif #ifdef __cplusplus } #endif #endif /** @} */ /* end of group */