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22 * @file testbed/testbed_api_hosts.c
23 * @brief API for manipulating 'hosts' controlled by the GNUnet testing service;
24 * allows parsing hosts files, starting, stopping and communicating (via
25 * SSH/stdin/stdout) with the remote (or local) processes
26 * @author Christian Grothoff
29 #include "gnunet_util_lib.h"
30 #include "gnunet_testbed_service.h"
31 #include "gnunet_core_service.h"
32 #include "gnunet_transport_service.h"
34 #include "testbed_api.h"
35 #include "testbed_api_hosts.h"
36 #include "testbed_helper.h"
37 #include "testbed_api_operations.h"
43 * Generic logging shorthand
45 #define LOG(kind, ...) \
46 GNUNET_log_from (kind, "testbed-api-hosts", __VA_ARGS__);
49 * Debug logging shorthand
51 #define LOG_DEBUG(...) \
52 LOG (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__);
55 * Prints API violation message
57 #define API_VIOLATION(cond,errstr) \
61 LOG (GNUNET_ERROR_TYPE_ERROR, "API violation detected: %s\n", errstr); \
66 * Log an error message at log-level 'level' that indicates a failure of the
67 * command 'cmd' with the message given by gai_strerror(rc).
69 #define LOG_GAI(level, cmd, rc) do { LOG(level, _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, gai_strerror(rc)); } while(0)
72 * Number of extra elements we create space for when we grow host list
74 #define HOST_LIST_GROW_STEP 10
78 * A list entry for registered controllers list
80 struct RegisteredController
83 * The controller at which this host is registered
85 const struct GNUNET_TESTBED_Controller *controller;
88 * The next ptr for DLL
90 struct RegisteredController *next;
93 * The prev ptr for DLL
95 struct RegisteredController *prev;
100 * Opaque handle to a host running experiments managed by the testing framework.
101 * The master process must be able to SSH to this host without password (via
104 struct GNUNET_TESTBED_Host
108 * The hostname of the host; NULL for localhost
110 const char *hostname;
113 * The username to be used for SSH login
115 const char *username;
118 * the configuration to use as a template while starting a controller on this
119 * host. Operation queue size specific to a host are also read from this
120 * configuration handle. After starting the controller, it points to the actual
121 * configuration with which the controller is running
123 struct GNUNET_CONFIGURATION_Handle *cfg;
126 * The head for the list of controllers where this host is registered
128 struct RegisteredController *rc_head;
131 * The tail for the list of controllers where this host is registered
133 struct RegisteredController *rc_tail;
136 * Operation queue for simultaneous overlay connect operations target at this
139 struct OperationQueue *opq_parallel_overlay_connect_operations;
142 * Is a controller started on this host? FIXME: Is this needed?
144 int controller_started;
147 * Is this host locked by GNUNET_TESTBED_controller_start()?
152 * Global ID we use to refer to a host on the network
157 * The port which is to be used for SSH
165 * Array of available hosts
167 static struct GNUNET_TESTBED_Host **host_list;
170 * The size of the available hosts list
172 static unsigned int host_list_size;
176 * Lookup a host by ID.
178 * @param id global host ID assigned to the host; 0 is
179 * reserved to always mean 'localhost'
180 * @return handle to the host, NULL if host not found
182 struct GNUNET_TESTBED_Host *
183 GNUNET_TESTBED_host_lookup_by_id_ (uint32_t id)
185 if (host_list_size <= id)
187 return host_list[id];
192 * Create a host by ID; given this host handle, we could not
193 * run peers at the host, but we can talk about the host
196 * @param id global host ID assigned to the host; 0 is
197 * reserved to always mean 'localhost'
198 * @param cfg the configuration to use as a template while starting a controller
199 * on this host. Operation queue sizes specific to a host are also
200 * read from this configuration handle
201 * @return handle to the host, NULL on error
203 struct GNUNET_TESTBED_Host *
204 GNUNET_TESTBED_host_create_by_id_ (uint32_t id,
205 const struct GNUNET_CONFIGURATION_Handle *cfg)
207 return GNUNET_TESTBED_host_create_with_id (id, NULL, NULL, cfg, 0);
212 * Obtain the host's unique global ID.
214 * @param host handle to the host, NULL means 'localhost'
215 * @return id global host ID assigned to the host (0 is
216 * 'localhost', but then obviously not globally unique)
219 GNUNET_TESTBED_host_get_id_ (const struct GNUNET_TESTBED_Host * host)
226 * Obtain the host's hostname.
228 * @param host handle to the host, NULL means 'localhost'
229 * @return hostname of the host
232 GNUNET_TESTBED_host_get_hostname (const struct GNUNET_TESTBED_Host *host)
234 return host->hostname;
239 * Obtain the host's username
241 * @param host handle to the host, NULL means 'localhost'
242 * @return username to login to the host
245 GNUNET_TESTBED_host_get_username_ (const struct GNUNET_TESTBED_Host *host)
247 return host->username;
252 * Obtain the host's ssh port
254 * @param host handle to the host, NULL means 'localhost'
255 * @return username to login to the host
258 GNUNET_TESTBED_host_get_ssh_port_ (const struct GNUNET_TESTBED_Host * host)
265 * Check whether a controller is already started on the given host
267 * @param host the handle to the host
268 * @return GNUNET_YES if the controller is already started; GNUNET_NO if not
271 GNUNET_TESTBED_host_controller_started (const struct GNUNET_TESTBED_Host *host)
273 return host->controller_started;
278 * Obtain the host's configuration template
280 * @param host handle to the host
281 * @return the host's configuration template
283 const struct GNUNET_CONFIGURATION_Handle *
284 GNUNET_TESTBED_host_get_cfg_ (const struct GNUNET_TESTBED_Host *host)
291 * Function to replace host's configuration
293 * @param host the host handle
294 * @param new_cfg the new configuration to replace the old one
297 GNUNET_TESTBED_host_replace_cfg_ (struct GNUNET_TESTBED_Host *host,
298 const struct GNUNET_CONFIGURATION_Handle *new_cfg)
300 GNUNET_CONFIGURATION_destroy (host->cfg);
301 host->cfg = GNUNET_CONFIGURATION_dup (new_cfg);
306 * Create a host to run peers and controllers on.
308 * @param id global host ID assigned to the host; 0 is
309 * reserved to always mean 'localhost'
310 * @param hostname name of the host, use "NULL" for localhost
311 * @param username username to use for the login; may be NULL
312 * @param cfg the configuration to use as a template while starting a controller
313 * on this host. Operation queue sizes specific to a host are also
314 * read from this configuration handle
315 * @param port port number to use for ssh; use 0 to let ssh decide
316 * @return handle to the host, NULL on error
318 struct GNUNET_TESTBED_Host *
319 GNUNET_TESTBED_host_create_with_id (uint32_t id, const char *hostname,
320 const char *username,
321 const struct GNUNET_CONFIGURATION_Handle
325 struct GNUNET_TESTBED_Host *host;
326 unsigned int new_size;
328 if ((id < host_list_size) && (NULL != host_list[id]))
330 LOG (GNUNET_ERROR_TYPE_WARNING, "Host with id: %u already created\n", id);
333 host = GNUNET_new (struct GNUNET_TESTBED_Host);
334 host->hostname = (NULL != hostname) ? GNUNET_strdup (hostname) : NULL;
335 host->username = (NULL != username) ? GNUNET_strdup (username) : NULL;
337 host->port = (0 == port) ? 22 : port;
338 host->cfg = GNUNET_CONFIGURATION_dup (cfg);
339 host->opq_parallel_overlay_connect_operations =
340 GNUNET_TESTBED_operation_queue_create_ (OPERATION_QUEUE_TYPE_ADAPTIVE,
342 new_size = host_list_size;
343 while (id >= new_size)
344 new_size += HOST_LIST_GROW_STEP;
345 if (new_size != host_list_size)
346 GNUNET_array_grow (host_list, host_list_size, new_size);
347 GNUNET_assert (id < host_list_size);
348 LOG (GNUNET_ERROR_TYPE_DEBUG, "Adding host with id: %u\n", host->id);
349 host_list[id] = host;
355 * Create a host to run peers and controllers on.
357 * @param hostname name of the host, use "NULL" for localhost
358 * @param username username to use for the login; may be NULL
359 * @param cfg the configuration to use as a template while starting a controller
360 * on this host. Operation queue sizes specific to a host are also
361 * read from this configuration handle
362 * @param port port number to use for ssh; use 0 to let ssh decide
363 * @return handle to the host, NULL on error
365 struct GNUNET_TESTBED_Host *
366 GNUNET_TESTBED_host_create (const char *hostname, const char *username,
367 const struct GNUNET_CONFIGURATION_Handle *cfg,
370 static uint32_t uid_generator;
372 if (NULL == hostname)
373 return GNUNET_TESTBED_host_create_with_id (0, hostname, username,
375 return GNUNET_TESTBED_host_create_with_id (++uid_generator, hostname,
376 username, cfg, port);
381 * Load a set of hosts from a configuration file.
383 * @param filename file with the host specification
384 * @param cfg the configuration to use as a template while starting a controller
385 * on any of the loaded hosts. Operation queue sizes specific to a host
386 * are also read from this configuration handle
387 * @param hosts set to the hosts found in the file; caller must free this if
388 * number of hosts returned is greater than 0
389 * @return number of hosts returned in 'hosts', 0 on error
392 GNUNET_TESTBED_hosts_load_from_file (const char *filename,
393 const struct GNUNET_CONFIGURATION_Handle
395 struct GNUNET_TESTBED_Host ***hosts)
397 struct GNUNET_TESTBED_Host *starting_host;
403 regmatch_t pmatch[6];
410 GNUNET_assert (NULL != filename);
411 if (GNUNET_YES != GNUNET_DISK_file_test (filename))
413 LOG (GNUNET_ERROR_TYPE_WARNING, _("Hosts file %s not found\n"), filename);
417 GNUNET_DISK_file_size (filename, &fs, GNUNET_YES, GNUNET_YES))
421 LOG (GNUNET_ERROR_TYPE_WARNING, _("Hosts file %s has no data\n"), filename);
424 data = GNUNET_malloc (fs);
425 if (fs != GNUNET_DISK_fn_read (filename, data, fs))
428 LOG (GNUNET_ERROR_TYPE_WARNING, _("Hosts file %s cannot be read\n"),
434 starting_host = NULL;
436 /* refer RFC 952 and RFC 1123 for valid hostnames */
437 GNUNET_assert (0 == regcomp (&rex,
438 "^(([[:alnum:]]+)@)?" /* username */
439 "([[:alnum:]]+[-[:alnum:]_\\.]+)" /* hostname */
440 "(:([[:digit:]]{1,5}))?", /* port */
441 REG_EXTENDED | REG_ICASE));
442 while (offset < (fs - 1))
445 if (((data[offset] == '\n')) && (buf != &data[offset]))
453 if ((REG_NOMATCH == regexec (&rex, buf, 6, pmatch, 0))
454 || (-1 == pmatch[3].rm_so))
456 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
457 "Error reading line `%s' in hostfile\n", buf);
458 buf = &data[offset + 1];
461 if (-1 != pmatch[2].rm_so)
463 size = pmatch[2].rm_eo - pmatch[2].rm_so;
464 username = GNUNET_malloc (size + 1);
465 username[size] = '\0';
466 GNUNET_assert (NULL != strncpy (username, buf + pmatch[2].rm_so, size));
468 if (-1 != pmatch[5].rm_so)
470 (void) SSCANF (buf + pmatch[5].rm_so, "%5hd", &port);
472 size = pmatch[3].rm_eo - pmatch[3].rm_so;
473 hostname = GNUNET_malloc (size + 1);
474 hostname[size] = '\0';
475 GNUNET_assert (NULL != strncpy (hostname, buf + pmatch[3].rm_so, size));
476 LOG (GNUNET_ERROR_TYPE_DEBUG,
477 "Successfully read host %s, port %d and user %s from file\n",
478 (NULL == hostname) ? "NULL" : hostname,
480 (NULL == username) ? "NULL" : username);
481 /* We store hosts in a static list; hence we only require the starting
482 * host pointer in that list to access the newly created list of hosts */
483 if (NULL == starting_host)
484 starting_host = GNUNET_TESTBED_host_create (hostname, username, cfg,
487 (void) GNUNET_TESTBED_host_create (hostname, username, cfg, port);
489 GNUNET_free_non_null (username);
490 GNUNET_free (hostname);
491 buf = &data[offset + 1];
493 else if ((data[offset] == '\n') || (data[offset] == '\0'))
494 buf = &data[offset + 1];
498 if (NULL == starting_host)
500 *hosts = GNUNET_malloc (sizeof (struct GNUNET_TESTBED_Host *) * count);
501 memcpy (*hosts, &host_list[GNUNET_TESTBED_host_get_id_ (starting_host)],
502 sizeof (struct GNUNET_TESTBED_Host *) * count);
508 * Resolves a hostname using getaddrinfo
510 * @param host the hostname
511 * @return the string representing the IPv4 address of the given host; NULL upon error
514 simple_resolve (const char *host)
516 struct addrinfo *res;
517 const struct sockaddr_in *in_addr;
519 struct addrinfo hint;
522 hint.ai_family = AF_INET; /* IPv4 */
523 hint.ai_socktype = 0;
524 hint.ai_protocol = 0;
527 hint.ai_canonname = NULL;
529 hint.ai_flags = AI_NUMERICSERV;
531 LOG_DEBUG ("Resolving [%s]\n", host);
532 if (0 != (rc = getaddrinfo (host, "22", &hint, &res)))
534 LOG_GAI (GNUNET_ERROR_TYPE_ERROR, "getaddrinfo", rc);
537 GNUNET_assert (NULL != res);
538 GNUNET_assert (NULL != res->ai_addr);
539 GNUNET_assert (sizeof (struct sockaddr_in) == res->ai_addrlen);
540 in_addr = (const struct sockaddr_in *) res->ai_addr;
541 hostip = inet_ntoa (in_addr->sin_addr);
542 GNUNET_assert (NULL != hostip);
544 LOG_DEBUG ("Resolved [%s] to [%s]\n", host, hostip);
550 * Loads the set of host allocated by the LoadLeveler Job Scheduler. This
551 * function is only available when compiled with support for LoadLeveler and is
552 * used for running on the SuperMUC
554 * @param cfg the configuration to use as a template while starting a controller
555 * on any of the loaded hosts. Operation queue sizes specific to a host
556 * are also read from this configuration handle
557 * @param hosts set to the hosts found in the file; caller must free this if
558 * number of hosts returned is greater than 0
559 * @return number of hosts returned in 'hosts', 0 on error
562 GNUNET_TESTBED_hosts_load_from_loadleveler (const struct
563 GNUNET_CONFIGURATION_Handle *cfg,
564 struct GNUNET_TESTBED_Host ***hosts)
567 LOG (GNUNET_ERROR_TYPE_ERROR,
568 _("The function %s is only available when compiled with (--with-ll)\n"),
572 const char *hostfile;
574 if (NULL == (hostfile = getenv ("MP_SAVEHOSTFILE")))
579 return GNUNET_TESTBED_hosts_load_from_file (hostfile, cfg, hosts);
585 * Destroy a host handle. Must only be called once everything
586 * running on that host has been stopped.
588 * @param host handle to destroy
591 GNUNET_TESTBED_host_destroy (struct GNUNET_TESTBED_Host *host)
593 struct RegisteredController *rc;
596 GNUNET_assert (host->id < host_list_size);
597 GNUNET_assert (host_list[host->id] == host);
598 host_list[host->id] = NULL;
599 /* clear registered controllers list */
600 for (rc = host->rc_head; NULL != rc; rc = host->rc_head)
602 GNUNET_CONTAINER_DLL_remove (host->rc_head, host->rc_tail, rc);
605 GNUNET_free_non_null ((char *) host->username);
606 GNUNET_free_non_null ((char *) host->hostname);
607 GNUNET_TESTBED_operation_queue_destroy_
608 (host->opq_parallel_overlay_connect_operations);
609 GNUNET_CONFIGURATION_destroy (host->cfg);
611 while (host_list_size >= HOST_LIST_GROW_STEP)
613 for (id = host_list_size - 1; id > host_list_size - HOST_LIST_GROW_STEP;
615 if (NULL != host_list[id])
617 if (id != host_list_size - HOST_LIST_GROW_STEP)
619 if (NULL != host_list[id])
621 host_list_size -= HOST_LIST_GROW_STEP;
624 GNUNET_realloc (host_list,
625 sizeof (struct GNUNET_TESTBED_Host *) * host_list_size);
630 * Marks a host as registered with a controller
632 * @param host the host to mark
633 * @param controller the controller at which this host is registered
636 GNUNET_TESTBED_mark_host_registered_at_ (struct GNUNET_TESTBED_Host *host,
637 const struct GNUNET_TESTBED_Controller
640 struct RegisteredController *rc;
642 for (rc = host->rc_head; NULL != rc; rc = rc->next)
644 if (controller == rc->controller) /* already registered at controller */
650 rc = GNUNET_new (struct RegisteredController);
651 rc->controller = controller;
652 GNUNET_CONTAINER_DLL_insert_tail (host->rc_head, host->rc_tail, rc);
657 * Unmarks a host registered at a controller
659 * @param host the host to unmark
660 * @param controller the controller at which this host has to be unmarked
663 GNUNET_TESTBED_deregister_host_at_ (struct GNUNET_TESTBED_Host *host,
664 const struct GNUNET_TESTBED_Controller
667 struct RegisteredController *rc;
669 for (rc = host->rc_head; NULL != rc; rc=rc->next)
670 if (controller == rc->controller)
677 GNUNET_CONTAINER_DLL_remove (host->rc_head, host->rc_tail, rc);
683 * Checks whether a host has been registered
685 * @param host the host to check
686 * @param controller the controller at which host's registration is checked
687 * @return GNUNET_YES if registered; GNUNET_NO if not
690 GNUNET_TESTBED_is_host_registered_ (const struct GNUNET_TESTBED_Host *host,
691 const struct GNUNET_TESTBED_Controller
694 struct RegisteredController *rc;
696 for (rc = host->rc_head; NULL != rc; rc = rc->next)
698 if (controller == rc->controller) /* already registered at controller */
708 * Handle for controller process
710 struct GNUNET_TESTBED_ControllerProc
715 struct GNUNET_HELPER_Handle *helper;
718 * The arguments used to start the helper
723 * The host where the helper is run
725 struct GNUNET_TESTBED_Host *host;
728 * The controller error callback
730 GNUNET_TESTBED_ControllerStatusCallback cb;
733 * The closure for the above callback
738 * The send handle for the helper
740 struct GNUNET_HELPER_SendHandle *shandle;
743 * The message corresponding to send handle
745 struct GNUNET_MessageHeader *msg;
751 * Function to copy NULL terminated list of arguments
753 * @param argv the NULL terminated list of arguments. Cannot be NULL.
754 * @return the copied NULL terminated arguments
757 copy_argv (const char *const *argv)
762 GNUNET_assert (NULL != argv);
763 for (argp = 0; NULL != argv[argp]; argp++) ;
764 argv_dup = GNUNET_malloc (sizeof (char *) * (argp + 1));
765 for (argp = 0; NULL != argv[argp]; argp++)
766 argv_dup[argp] = GNUNET_strdup (argv[argp]);
772 * Function to join NULL terminated list of arguments
774 * @param argv1 the NULL terminated list of arguments. Cannot be NULL.
775 * @param argv2 the NULL terminated list of arguments. Cannot be NULL.
776 * @return the joined NULL terminated arguments
779 join_argv (const char *const *argv1, const char *const *argv2)
788 for (cnt = 0; NULL != argv1[cnt]; cnt++)
790 argv = GNUNET_strdup (argv1[cnt]);
791 GNUNET_array_append (argvj, carg, argv);
793 for (cnt = 0; NULL != argv2[cnt]; cnt++)
795 argv = GNUNET_strdup (argv2[cnt]);
796 GNUNET_array_append (argvj, carg, argv);
798 GNUNET_array_append (argvj, carg, NULL);
804 * Frees the given NULL terminated arguments
806 * @param argv the NULL terminated list of arguments
809 free_argv (char **argv)
813 for (argp = 0; NULL != argv[argp]; argp++)
814 GNUNET_free (argv[argp]);
820 * Generates arguments for opening a remote shell. Builds up the arguments
821 * from the environment variable GNUNET_TESTBED_RSH_CMD. The variable
822 * should not mention `-p' (port) option and destination address as these will
823 * be set locally in the function from its parameteres. If the environmental
824 * variable is not found then it defaults to `ssh -o BatchMode=yes -o
825 * NoHostAuthenticationForLocalhost=yes -o StrictHostkeyChecking=no -o
826 * PasswordAuthentication=noc'
828 * @param port the destination port number
829 * @param hostname the hostname of the target host
830 * @param username the username to use while connecting to target host
831 * @return NULL terminated list of arguments
834 gen_rsh_args (const char *port, const char *hostname, const char *username)
836 static const char *default_ssh_args[] = {
841 "NoHostAuthenticationForLocalhost=yes",
843 "StrictHostKeyChecking=no",
845 "PasswordAuthentication=no",
858 if (NULL != (ssh_cmd = getenv ("GNUNET_TESTBED_RSH_CMD")))
860 ssh_cmd = GNUNET_strdup (ssh_cmd);
861 ssh_cmd_cp = ssh_cmd;
862 for (size = 0; NULL != (arg = strtok (ssh_cmd, " ")); ssh_cmd = NULL)
863 GNUNET_array_append (ssh_args, size, GNUNET_strdup (arg));
864 GNUNET_free (ssh_cmd_cp);
868 ssh_args = copy_argv (default_ssh_args);
869 size = (sizeof (default_ssh_args)) / (sizeof (const char *));
870 GNUNET_array_grow (ssh_args, size, size - 1);
872 for (cnt = 0; cnt < size; cnt++)
897 ssh_args[cnt] = GNUNET_strdup (new_arg);
899 GNUNET_array_append (ssh_args, size, NULL);
905 * Generates the arguments needed for executing the given binary in a remote
906 * shell. Builds the arguments from the environmental variable
907 * GNUNET_TETSBED_RSH_CMD_SUFFIX. If the environmental variable is not found,
908 * only the given binary name will be present in the returned arguments
910 * @param append_args the arguments to append after generating the suffix
911 * arguments. Can be NULL; if not must be NULL terminated 'char *' array
912 * @return NULL-terminated args
915 gen_rsh_suffix_args (const char * const *append_args)
922 unsigned int append_cnt;
926 if (NULL != (rshell_cmd = getenv ("GNUNET_TESTBED_RSH_CMD_SUFFIX")))
928 rshell_cmd = GNUNET_strdup (rshell_cmd);
929 rshell_cmd_cp = rshell_cmd;
930 for (; NULL != (arg = strtok (rshell_cmd, " ")); rshell_cmd = NULL)
931 GNUNET_array_append (rshell_args, cnt, GNUNET_strdup (arg));
932 GNUNET_free (rshell_cmd_cp);
934 if (NULL != append_args)
936 for (append_cnt = 0; NULL != append_args[append_cnt]; append_cnt++)
937 GNUNET_array_append (rshell_args, cnt, GNUNET_strdup (append_args[append_cnt]));
939 GNUNET_array_append (rshell_args, cnt, NULL);
945 * Functions with this signature are called whenever a
946 * complete message is received by the tokenizer.
948 * Do not call GNUNET_SERVER_mst_destroy in callback
951 * @param client identification of the client
952 * @param message the actual message
954 * @return GNUNET_OK on success, GNUNET_SYSERR to stop further processing
957 helper_mst (void *cls, void *client, const struct GNUNET_MessageHeader *message)
959 struct GNUNET_TESTBED_ControllerProc *cp = cls;
960 const struct GNUNET_TESTBED_HelperReply *msg;
961 const char *hostname;
966 msg = (const struct GNUNET_TESTBED_HelperReply *) message;
967 GNUNET_assert (sizeof (struct GNUNET_TESTBED_HelperReply) <
968 ntohs (msg->header.size));
969 GNUNET_assert (GNUNET_MESSAGE_TYPE_TESTBED_HELPER_REPLY ==
970 ntohs (msg->header.type));
971 config_size = (uLongf) ntohs (msg->config_size);
973 (uLongf) (ntohs (msg->header.size) -
974 sizeof (struct GNUNET_TESTBED_HelperReply));
975 config = GNUNET_malloc (config_size);
976 GNUNET_assert (Z_OK ==
977 uncompress ((Bytef *) config, &config_size,
978 (const Bytef *) &msg[1], xconfig_size));
979 /* Replace the configuration template present in the host with the
980 controller's running configuration */
981 GNUNET_CONFIGURATION_destroy (cp->host->cfg);
982 cp->host->cfg = GNUNET_CONFIGURATION_create ();
983 GNUNET_assert (GNUNET_CONFIGURATION_deserialize
984 (cp->host->cfg, config, config_size, GNUNET_NO));
985 GNUNET_free (config);
986 if (NULL == (hostname = GNUNET_TESTBED_host_get_hostname (cp->host)))
987 hostname = "localhost";
988 /* Change the hostname so that we can connect to it */
989 GNUNET_CONFIGURATION_set_value_string (cp->host->cfg, "testbed", "hostname",
991 cp->host->locked = GNUNET_NO;
992 cp->host->controller_started = GNUNET_YES;
993 cp->cb (cp->cls, cp->host->cfg, GNUNET_OK);
999 * Continuation function from GNUNET_HELPER_send()
1001 * @param cls closure
1002 * @param result GNUNET_OK on success,
1003 * GNUNET_NO if helper process died
1004 * GNUNET_SYSERR during GNUNET_HELPER_stop
1007 clear_msg (void *cls, int result)
1009 struct GNUNET_TESTBED_ControllerProc *cp = cls;
1011 GNUNET_assert (NULL != cp->shandle);
1013 GNUNET_free (cp->msg);
1019 * Callback that will be called when the helper process dies. This is not called
1020 * when the helper process is stoped using GNUNET_HELPER_stop()
1022 * @param cls the closure from GNUNET_HELPER_start()
1025 helper_exp_cb (void *cls)
1027 struct GNUNET_TESTBED_ControllerProc *cp = cls;
1028 GNUNET_TESTBED_ControllerStatusCallback cb;
1034 GNUNET_TESTBED_controller_stop (cp);
1036 cb (cb_cls, NULL, GNUNET_SYSERR);
1041 * Starts a controller process at the given host. The given host's configration
1042 * is used as a Template configuration to use for the remote controller; the
1043 * remote controller will be started with a slightly modified configuration
1044 * (port numbers, unix domain sockets and service home values are changed as per
1045 * TESTING library on the remote host). The modified configuration replaces the
1046 * host's existing configuration before signalling success through the
1047 * GNUNET_TESTBED_ControllerStatusCallback()
1049 * @param trusted_ip the ip address of the controller which will be set as TRUSTED
1050 * HOST(all connections form this ip are permitted by the testbed) when
1051 * starting testbed controller at host. This can either be a single ip
1052 * address or a network address in CIDR notation.
1053 * @param host the host where the controller has to be started. CANNOT be NULL.
1054 * @param cb function called when the controller is successfully started or
1055 * dies unexpectedly; GNUNET_TESTBED_controller_stop shouldn't be
1056 * called if cb is called with GNUNET_SYSERR as status. Will never be
1057 * called in the same task as 'GNUNET_TESTBED_controller_start'
1058 * (synchronous errors will be signalled by returning NULL). This
1059 * parameter cannot be NULL.
1060 * @param cls closure for above callbacks
1061 * @return the controller process handle, NULL on errors
1063 struct GNUNET_TESTBED_ControllerProc *
1064 GNUNET_TESTBED_controller_start (const char *trusted_ip,
1065 struct GNUNET_TESTBED_Host *host,
1066 GNUNET_TESTBED_ControllerStatusCallback cb,
1069 struct GNUNET_TESTBED_ControllerProc *cp;
1070 struct GNUNET_TESTBED_HelperInit *msg;
1071 const struct GNUNET_CONFIGURATION_Handle *cfg;
1072 const char *hostname;
1073 static char *const binary_argv[] = {
1074 HELPER_TESTBED_BINARY, NULL
1077 GNUNET_assert (NULL != host);
1078 GNUNET_assert (NULL != (cfg = GNUNET_TESTBED_host_get_cfg_ (host)));
1080 API_VIOLATION (GNUNET_NO == host->locked,
1081 "Host is already locked by a previous call to GNUNET_TESTBED_controller_start()");
1082 host->locked = GNUNET_YES;
1083 API_VIOLATION (GNUNET_NO == host->controller_started,
1084 "Attempting to start a controller on a host which is already started a controller");
1085 cp = GNUNET_new (struct GNUNET_TESTBED_ControllerProc);
1086 if (0 == GNUNET_TESTBED_host_get_id_ (host))
1089 GNUNET_HELPER_start (GNUNET_YES, HELPER_TESTBED_BINARY, binary_argv,
1090 &helper_mst, &helper_exp_cb, cp);
1094 char *helper_binary_path_args[2];
1096 char **rsh_suffix_args;
1097 const char *username;
1103 username = host->username;
1104 hostname = host->hostname;
1105 GNUNET_asprintf (&port, "%u", host->port);
1106 LOG_DEBUG ("Starting remote connection to destination %s\n", hostname);
1108 GNUNET_CONFIGURATION_get_value_filename (cfg, "testbed",
1109 "HELPER_BINARY_PATH",
1110 &helper_binary_path_args[0]))
1111 helper_binary_path_args[0] =
1112 GNUNET_OS_get_libexec_binary_path (HELPER_TESTBED_BINARY);
1113 helper_binary_path_args[1] = NULL;
1114 rsh_args = gen_rsh_args (port, hostname, username);
1115 rsh_suffix_args = gen_rsh_suffix_args ((const char **) helper_binary_path_args);
1117 join_argv ((const char **) rsh_args, (const char **) rsh_suffix_args);
1118 free_argv (rsh_args);
1119 free_argv (rsh_suffix_args);
1121 argstr = GNUNET_strdup ("");
1122 for (cnt = 0; NULL != cp->helper_argv[cnt]; cnt++)
1125 GNUNET_assert (0 < GNUNET_asprintf (&argstr, "%s %s", aux, cp->helper_argv[cnt]));
1128 LOG_DEBUG ("Helper cmd str: %s\n", argstr);
1129 GNUNET_free (argstr);
1131 GNUNET_HELPER_start (GNUNET_NO, cp->helper_argv[0], cp->helper_argv, &helper_mst,
1132 &helper_exp_cb, cp);
1133 GNUNET_free (helper_binary_path_args[0]);
1135 if (NULL == cp->helper)
1137 if (NULL != cp->helper_argv)
1138 free_argv (cp->helper_argv);
1145 msg = GNUNET_TESTBED_create_helper_init_msg_ (trusted_ip, hostname, cfg);
1146 cp->msg = &msg->header;
1148 GNUNET_HELPER_send (cp->helper, &msg->header, GNUNET_NO, &clear_msg, cp);
1149 if (NULL == cp->shandle)
1152 GNUNET_TESTBED_controller_stop (cp);
1160 * Sends termination signal to the controller's helper process
1162 * @param cproc the handle to the controller's helper process
1165 GNUNET_TESTBED_controller_kill_ (struct GNUNET_TESTBED_ControllerProc *cproc)
1167 if (NULL != cproc->shandle)
1168 GNUNET_HELPER_send_cancel (cproc->shandle);
1169 if (NULL != cproc->helper)
1170 GNUNET_HELPER_kill (cproc->helper, GNUNET_YES);
1175 * Cleans-up the controller's helper process handle
1177 * @param cproc the handle to the controller's helper process
1180 GNUNET_TESTBED_controller_destroy_ (struct GNUNET_TESTBED_ControllerProc *cproc)
1182 if (NULL != cproc->helper)
1184 GNUNET_break (GNUNET_OK == GNUNET_HELPER_wait (cproc->helper));
1185 GNUNET_HELPER_destroy (cproc->helper);
1187 if (NULL != cproc->helper_argv)
1188 free_argv (cproc->helper_argv);
1189 cproc->host->controller_started = GNUNET_NO;
1190 cproc->host->locked = GNUNET_NO;
1191 GNUNET_free_non_null (cproc->msg);
1192 GNUNET_free (cproc);
1197 * Stop the controller process (also will terminate all peers and controllers
1198 * dependent on this controller). This function blocks until the testbed has
1199 * been fully terminated (!). The controller status cb from
1200 * GNUNET_TESTBED_controller_start() will not be called.
1202 * @param cproc the controller process handle
1205 GNUNET_TESTBED_controller_stop (struct GNUNET_TESTBED_ControllerProc *cproc)
1207 GNUNET_TESTBED_controller_kill_ (cproc);
1208 GNUNET_TESTBED_controller_destroy_ (cproc);
1213 * The handle for whether a host is habitable or not
1215 struct GNUNET_TESTBED_HostHabitableCheckHandle
1220 const struct GNUNET_TESTBED_Host *host;
1223 * The callback to call once we have the status
1225 GNUNET_TESTBED_HostHabitableCallback cb;
1228 * The callback closure
1233 * The process handle for the SSH process
1235 struct GNUNET_OS_Process *auxp;
1238 * The arguments used to start the helper
1243 * Task id for the habitability check task
1245 struct GNUNET_SCHEDULER_Task * habitability_check_task;
1248 * How long we wait before checking the process status. Should grow
1251 struct GNUNET_TIME_Relative wait_time;
1257 * Task for checking whether a host is habitable or not
1259 * @param cls GNUNET_TESTBED_HostHabitableCheckHandle
1262 habitability_check (void *cls)
1264 struct GNUNET_TESTBED_HostHabitableCheckHandle *h = cls;
1266 GNUNET_TESTBED_HostHabitableCallback cb;
1267 const struct GNUNET_TESTBED_Host *host;
1269 enum GNUNET_OS_ProcessStatusType type;
1272 h->habitability_check_task = NULL;
1273 ret = GNUNET_OS_process_status (h->auxp, &type, &code);
1274 if (GNUNET_SYSERR == ret)
1280 if (GNUNET_NO == ret)
1282 h->wait_time = GNUNET_TIME_STD_BACKOFF (h->wait_time);
1283 h->habitability_check_task =
1284 GNUNET_SCHEDULER_add_delayed (h->wait_time, &habitability_check, h);
1287 GNUNET_OS_process_destroy (h->auxp);
1289 ret = (0 != code) ? GNUNET_NO : GNUNET_YES;
1292 if (NULL != h->auxp)
1293 GNUNET_OS_process_destroy (h->auxp);
1297 free_argv (h->helper_argv);
1300 cb (cb_cls, host, ret);
1305 * Checks whether a host can be used to start testbed service
1307 * @param host the host to check
1308 * @param config the configuration handle to lookup the path of the testbed
1310 * @param cb the callback to call to inform about habitability of the given host
1311 * @param cb_cls the closure for the callback
1312 * @return NULL upon any error or a handle which can be passed to
1313 * GNUNET_TESTBED_is_host_habitable_cancel()
1315 struct GNUNET_TESTBED_HostHabitableCheckHandle *
1316 GNUNET_TESTBED_is_host_habitable (const struct GNUNET_TESTBED_Host *host,
1317 const struct GNUNET_CONFIGURATION_Handle
1319 GNUNET_TESTBED_HostHabitableCallback cb,
1322 struct GNUNET_TESTBED_HostHabitableCheckHandle *h;
1324 char **rsh_suffix_args;
1326 const char *hostname;
1329 h = GNUNET_new (struct GNUNET_TESTBED_HostHabitableCheckHandle);
1333 hostname = (NULL == host->hostname) ? "127.0.0.1" : host->hostname;
1335 GNUNET_CONFIGURATION_get_value_filename (config, "testbed",
1336 "HELPER_BINARY_PATH",
1339 GNUNET_OS_get_libexec_binary_path (HELPER_TESTBED_BINARY);
1340 GNUNET_asprintf (&port, "%u", host->port);
1341 rsh_args = gen_rsh_args (port, hostname, host->username);
1344 stat_args[0] = "stat";
1345 stat_args[2] = NULL;
1346 rsh_suffix_args = gen_rsh_suffix_args ((const char **) stat_args);
1347 GNUNET_free (stat_args[1]);
1348 h->helper_argv = join_argv ((const char **) rsh_args,
1349 (const char **) rsh_suffix_args);
1350 free_argv (rsh_suffix_args);
1351 free_argv (rsh_args);
1353 GNUNET_OS_start_process_vap (GNUNET_NO, GNUNET_OS_INHERIT_STD_ERR, NULL,
1354 NULL, NULL, h->helper_argv[0], h->helper_argv);
1355 if (NULL == h->auxp)
1357 GNUNET_break (0); /* Cannot exec SSH? */
1361 h->wait_time = GNUNET_TIME_STD_BACKOFF (h->wait_time);
1362 h->habitability_check_task =
1363 GNUNET_SCHEDULER_add_delayed (h->wait_time, &habitability_check, h);
1369 * Function to cancel a request started using GNUNET_TESTBED_is_host_habitable()
1371 * @param handle the habitability check handle
1374 GNUNET_TESTBED_is_host_habitable_cancel (struct
1375 GNUNET_TESTBED_HostHabitableCheckHandle
1378 GNUNET_SCHEDULER_cancel (handle->habitability_check_task);
1379 (void) GNUNET_OS_process_kill (handle->auxp, GNUNET_TERM_SIG);
1380 (void) GNUNET_OS_process_wait (handle->auxp);
1381 GNUNET_OS_process_destroy (handle->auxp);
1382 free_argv (handle->helper_argv);
1383 GNUNET_free (handle);
1388 * Register a host with the controller
1390 * @param controller the controller handle
1391 * @param host the host to register
1392 * @param cc the completion callback to call to inform the status of
1393 * registration. After calling this callback the registration handle
1394 * will be invalid. Cannot be NULL.
1395 * @param cc_cls the closure for the cc
1396 * @return handle to the host registration which can be used to cancel the
1399 struct GNUNET_TESTBED_HostRegistrationHandle *
1400 GNUNET_TESTBED_register_host (struct GNUNET_TESTBED_Controller *controller,
1401 struct GNUNET_TESTBED_Host *host,
1402 GNUNET_TESTBED_HostRegistrationCompletion cc,
1405 struct GNUNET_TESTBED_HostRegistrationHandle *rh;
1406 struct GNUNET_TESTBED_AddHostMessage *msg;
1407 const char *username;
1408 const char *hostname;
1415 uint16_t username_length;
1416 uint16_t hostname_length;
1418 if (NULL != controller->rh)
1420 hostname = GNUNET_TESTBED_host_get_hostname (host);
1421 if (GNUNET_YES == GNUNET_TESTBED_is_host_registered_ (host, controller))
1423 LOG (GNUNET_ERROR_TYPE_WARNING, "Host hostname: %s already registered\n",
1424 (NULL == hostname) ? "localhost" : hostname);
1427 rh = GNUNET_new (struct GNUNET_TESTBED_HostRegistrationHandle);
1430 GNUNET_assert (NULL != cc);
1432 rh->cc_cls = cc_cls;
1433 controller->rh = rh;
1434 username = GNUNET_TESTBED_host_get_username_ (host);
1435 username_length = 0;
1436 if (NULL != username)
1437 username_length = strlen (username);
1438 GNUNET_assert (NULL != hostname); /* Hostname must be present */
1439 hostname_length = strlen (hostname);
1440 GNUNET_assert (NULL != host->cfg);
1441 config = GNUNET_CONFIGURATION_serialize (host->cfg, &config_size);
1442 cc_size = GNUNET_TESTBED_compress_config_ (config, config_size, &cconfig);
1443 GNUNET_free (config);
1444 msg_size = (sizeof (struct GNUNET_TESTBED_AddHostMessage));
1445 msg_size += username_length;
1446 msg_size += hostname_length;
1447 msg_size += cc_size;
1448 msg = GNUNET_malloc (msg_size);
1449 msg->header.size = htons (msg_size);
1450 msg->header.type = htons (GNUNET_MESSAGE_TYPE_TESTBED_ADD_HOST);
1451 msg->host_id = htonl (GNUNET_TESTBED_host_get_id_ (host));
1452 msg->ssh_port = htons (GNUNET_TESTBED_host_get_ssh_port_ (host));
1454 if (NULL != username)
1456 msg->username_length = htons (username_length);
1457 ptr = memcpy (ptr, username, username_length);
1458 ptr += username_length;
1460 msg->hostname_length = htons (hostname_length);
1461 ptr = memcpy (ptr, hostname, hostname_length);
1462 ptr += hostname_length;
1463 msg->config_size = htons (config_size);
1464 ptr = memcpy (ptr, cconfig, cc_size);
1466 GNUNET_assert ((ptr - (void *) msg) == msg_size);
1467 GNUNET_free (cconfig);
1468 GNUNET_TESTBED_queue_message_ (controller,
1469 (struct GNUNET_MessageHeader *) msg);
1475 * Cancel the pending registration. Note that if the registration message is
1476 * already sent to the service the cancellation has only the effect that the
1477 * registration completion callback for the registration is never called.
1479 * @param handle the registration handle to cancel
1482 GNUNET_TESTBED_cancel_registration (struct GNUNET_TESTBED_HostRegistrationHandle
1485 if (handle != handle->c->rh)
1490 handle->c->rh = NULL;
1491 GNUNET_free (handle);
1496 * Queues the given operation in the queue for parallel overlay connects of the
1499 * @param h the host handle
1500 * @param op the operation to queue in the given host's parally overlay connect
1504 GNUNET_TESTBED_host_queue_oc_ (struct GNUNET_TESTBED_Host *h,
1505 struct GNUNET_TESTBED_Operation *op)
1507 GNUNET_TESTBED_operation_queue_insert_
1508 (h->opq_parallel_overlay_connect_operations, op);
1513 * Resolves the hostname of the host to an ip address
1515 * @param host the host whose hostname is to be resolved
1518 GNUNET_TESTBED_host_resolve_ (struct GNUNET_TESTBED_Host *host)
1522 hostname = (char *) host->hostname;
1523 host->hostname = simple_resolve (hostname);
1524 if (NULL == host->hostname)
1527 host->hostname = hostname;
1530 GNUNET_free (hostname);
1531 host->hostname = GNUNET_strdup (host->hostname);
1534 /* end of testbed_api_hosts.c */