2 This file is part of GNUnet
3 (C) 2008--2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
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"
42 * Generic logging shorthand
44 #define LOG(kind, ...) \
45 GNUNET_log_from (kind, "testbed-api-hosts", __VA_ARGS__);
48 * Debug logging shorthand
50 #define LOG_DEBUG(...) \
51 LOG (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__);
54 * Prints API violation message
56 #define API_VIOLATION(cond,errstr) \
60 LOG (GNUNET_ERROR_TYPE_ERROR, "API violation detected: %s\n", errstr); \
65 * Log an error message at log-level 'level' that indicates a failure of the
66 * command 'cmd' with the message given by gai_strerror(rc).
68 #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)
71 * Number of extra elements we create space for when we grow host list
73 #define HOST_LIST_GROW_STEP 10
77 * A list entry for registered controllers list
79 struct RegisteredController
82 * The controller at which this host is registered
84 const struct GNUNET_TESTBED_Controller *controller;
87 * The next ptr for DLL
89 struct RegisteredController *next;
92 * The prev ptr for DLL
94 struct RegisteredController *prev;
99 * Opaque handle to a host running experiments managed by the testing framework.
100 * The master process must be able to SSH to this host without password (via
103 struct GNUNET_TESTBED_Host
107 * The hostname of the host; NULL for localhost
109 const char *hostname;
112 * The username to be used for SSH login
114 const char *username;
117 * the configuration to use as a template while starting a controller on this
118 * host. Operation queue size specific to a host are also read from this
119 * configuration handle. After starting the controller, it points to the actual
120 * configuration with which the controller is running
122 struct GNUNET_CONFIGURATION_Handle *cfg;
125 * The head for the list of controllers where this host is registered
127 struct RegisteredController *rc_head;
130 * The tail for the list of controllers where this host is registered
132 struct RegisteredController *rc_tail;
135 * Operation queue for simultaneous overlay connect operations target at this
138 struct OperationQueue *opq_parallel_overlay_connect_operations;
141 * Is a controller started on this host? FIXME: Is this needed?
143 int controller_started;
146 * Is this host locked by GNUNET_TESTBED_controller_start()?
151 * Global ID we use to refer to a host on the network
156 * The port which is to be used for SSH
164 * Array of available hosts
166 static struct GNUNET_TESTBED_Host **host_list;
169 * The size of the available hosts list
171 static unsigned int host_list_size;
175 * Lookup a host by ID.
177 * @param id global host ID assigned to the host; 0 is
178 * reserved to always mean 'localhost'
179 * @return handle to the host, NULL if host not found
181 struct GNUNET_TESTBED_Host *
182 GNUNET_TESTBED_host_lookup_by_id_ (uint32_t id)
184 if (host_list_size <= id)
186 return host_list[id];
191 * Create a host by ID; given this host handle, we could not
192 * run peers at the host, but we can talk about the host
195 * @param id global host ID assigned to the host; 0 is
196 * reserved to always mean 'localhost'
197 * @param cfg the configuration to use as a template while starting a controller
198 * on this host. Operation queue sizes specific to a host are also
199 * read from this configuration handle
200 * @return handle to the host, NULL on error
202 struct GNUNET_TESTBED_Host *
203 GNUNET_TESTBED_host_create_by_id_ (uint32_t id,
204 const struct GNUNET_CONFIGURATION_Handle
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_malloc (sizeof (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 **host_array;
398 struct GNUNET_TESTBED_Host *starting_host;
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 while (offset < (fs - 1))
439 if (((data[offset] == '\n')) && (buf != &data[offset]))
443 SSCANF (buf, "%255[a-zA-Z0-9_]@%255[.a-zA-Z0-9-]:%5hd", username,
447 LOG (GNUNET_ERROR_TYPE_DEBUG,
448 "Successfully read host %s, port %d and user %s from file\n",
449 hostname, port, username);
450 /* We store hosts in a static list; hence we only require the starting
451 * host pointer in that list to access the newly created list of hosts */
452 if (NULL == starting_host)
453 starting_host = GNUNET_TESTBED_host_create (hostname, username, cfg,
456 (void) GNUNET_TESTBED_host_create (hostname, username, cfg, port);
460 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
461 "Error reading line `%s' in hostfile\n", buf);
462 buf = &data[offset + 1];
464 else if ((data[offset] == '\n') || (data[offset] == '\0'))
465 buf = &data[offset + 1];
468 if (NULL == starting_host)
470 *hosts = GNUNET_malloc (sizeof (struct GNUNET_TESTBED_Host *) * count);
471 memcpy (*hosts, &host_list[GNUNET_TESTBED_host_get_id_ (starting_host)],
472 sizeof (struct GNUNET_TESTBED_Host *) * count);
478 * Resolves a hostname using getaddrinfo
480 * @param host the hostname
481 * @return the string representing the IPv4 address of the given host; NULL upon error
484 simple_resolve (const char *host)
486 struct addrinfo *res;
487 const struct sockaddr_in *in_addr;
489 struct addrinfo hint;
492 hint.ai_family = AF_INET; /* IPv4 */
493 hint.ai_socktype = 0;
494 hint.ai_protocol = 0;
497 hint.ai_canonname = NULL;
499 hint.ai_flags = AI_NUMERICSERV;
501 LOG_DEBUG ("Resolving [%s]\n", host);
502 if (0 != (rc = getaddrinfo (host, "22", &hint, &res)))
504 LOG_GAI (GNUNET_ERROR_TYPE_ERROR, "getaddrinfo", rc);
507 GNUNET_assert (NULL != res);
508 GNUNET_assert (NULL != res->ai_addr);
509 GNUNET_assert (sizeof (struct sockaddr_in) == res->ai_addrlen);
510 in_addr = (const struct sockaddr_in *) res->ai_addr;
511 hostip = inet_ntoa (in_addr->sin_addr);
512 GNUNET_assert (NULL != hostip);
514 LOG_DEBUG ("Resolved [%s] to [%s]\n", host, hostip);
520 cmpstringp(const void *p1, const void *p2)
522 /* The actual arguments to this function are "pointers to
523 pointers to char", but strcmp(3) arguments are "pointers
524 to char", hence the following cast plus dereference */
526 return strcmp(* (char * const *) p1, * (char * const *) p2);
531 * Loads the set of host allocated by the LoadLeveler Job Scheduler. This
532 * function is only available when compiled with support for LoadLeveler and is
533 * used for running on the SuperMUC
535 * @param cfg the configuration to use as a template while starting a controller
536 * on any of the loaded hosts. Operation queue sizes specific to a host
537 * are also read from this configuration handle
538 * @param hosts set to the hosts found in the file; caller must free this if
539 * number of hosts returned is greater than 0
540 * @return number of hosts returned in 'hosts', 0 on error
543 GNUNET_TESTBED_hosts_load_from_loadleveler (const struct
544 GNUNET_CONFIGURATION_Handle *cfg,
545 struct GNUNET_TESTBED_Host ***hosts)
548 LOG (GNUNET_ERROR_TYPE_ERROR,
549 _("The function %s is only available when compiled with (--with-ll)\n"),
553 const char *hostfile;
557 struct GNUNET_TESTBED_Host **host_list;
570 if (NULL == (hostfile = getenv ("MP_SAVEHOSTFILE")))
575 if (GNUNET_SYSERR == GNUNET_DISK_file_size (hostfile, &size, GNUNET_YES,
586 buf = GNUNET_malloc (size + 1);
587 rsize = GNUNET_DISK_fn_read (hostfile, buf, (size_t) size);
588 if ( (GNUNET_SYSERR == rsize) || ((ssize_t) size != rsize) )
600 while (offset < size)
605 if ('!' == buf[offset])
611 if ('\n' == buf[offset])
615 if ('!' == buf[offset])
620 if ( (' ' == buf[offset])
621 || ('\t' == buf[offset])
622 || ('\r' == buf[offset]) )
627 hostname = &buf[offset];
631 if (isspace (buf[offset]))
634 for (host = 0; host < nhosts; host++)
635 if (0 == strcmp (hostnames[host], hostname))
639 LOG_DEBUG ("Adding host [%s]\n", hostname);
640 hostname = GNUNET_strdup (hostname);
641 GNUNET_array_append (hostnames, nhosts, hostname);
644 LOG_DEBUG ("Not adding host [%s] as it is already included\n", hostname);
652 GNUNET_free_non_null (buf);
653 if (NULL == hostnames)
657 qsort (hostnames, nhosts, sizeof (hostnames[0]), cmpstringp);
658 host_list = GNUNET_malloc (sizeof (struct GNUNET_TESTBED_Host *) * nhosts);
659 for (host = 0; host < nhosts; host++)
660 host_list[host] = GNUNET_TESTBED_host_create (hostnames[host], NULL, cfg, 0);
664 for (host = 0; host < nhosts; host++)
665 GNUNET_free (hostnames[host]);
666 GNUNET_free(hostnames);
673 * Destroy a host handle. Must only be called once everything
674 * running on that host has been stopped.
676 * @param host handle to destroy
679 GNUNET_TESTBED_host_destroy (struct GNUNET_TESTBED_Host *host)
681 struct RegisteredController *rc;
684 GNUNET_assert (host->id < host_list_size);
685 GNUNET_assert (host_list[host->id] == host);
686 host_list[host->id] = NULL;
687 /* clear registered controllers list */
688 for (rc = host->rc_head; NULL != rc; rc = host->rc_head)
690 GNUNET_CONTAINER_DLL_remove (host->rc_head, host->rc_tail, rc);
693 GNUNET_free_non_null ((char *) host->username);
694 GNUNET_free_non_null ((char *) host->hostname);
695 GNUNET_TESTBED_operation_queue_destroy_
696 (host->opq_parallel_overlay_connect_operations);
697 GNUNET_CONFIGURATION_destroy (host->cfg);
699 while (host_list_size >= HOST_LIST_GROW_STEP)
701 for (id = host_list_size - 1; id > host_list_size - HOST_LIST_GROW_STEP;
703 if (NULL != host_list[id])
705 if (id != host_list_size - HOST_LIST_GROW_STEP)
707 if (NULL != host_list[id])
709 host_list_size -= HOST_LIST_GROW_STEP;
712 GNUNET_realloc (host_list,
713 sizeof (struct GNUNET_TESTBED_Host *) * host_list_size);
718 * Marks a host as registered with a controller
720 * @param host the host to mark
721 * @param controller the controller at which this host is registered
724 GNUNET_TESTBED_mark_host_registered_at_ (struct GNUNET_TESTBED_Host *host,
725 const struct GNUNET_TESTBED_Controller
728 struct RegisteredController *rc;
730 for (rc = host->rc_head; NULL != rc; rc = rc->next)
732 if (controller == rc->controller) /* already registered at controller */
738 rc = GNUNET_malloc (sizeof (struct RegisteredController));
739 rc->controller = controller;
740 GNUNET_CONTAINER_DLL_insert_tail (host->rc_head, host->rc_tail, rc);
745 * Unmarks a host registered at a controller
747 * @param host the host to unmark
748 * @param controller the controller at which this host has to be unmarked
751 GNUNET_TESTBED_deregister_host_at_ (struct GNUNET_TESTBED_Host *host,
752 const struct GNUNET_TESTBED_Controller
755 struct RegisteredController *rc;
757 for (rc = host->rc_head; NULL != rc; rc=rc->next)
758 if (controller == rc->controller)
765 GNUNET_CONTAINER_DLL_remove (host->rc_head, host->rc_tail, rc);
771 * Checks whether a host has been registered
773 * @param host the host to check
774 * @param controller the controller at which host's registration is checked
775 * @return GNUNET_YES if registered; GNUNET_NO if not
778 GNUNET_TESTBED_is_host_registered_ (const struct GNUNET_TESTBED_Host *host,
779 const struct GNUNET_TESTBED_Controller
782 struct RegisteredController *rc;
784 for (rc = host->rc_head; NULL != rc; rc = rc->next)
786 if (controller == rc->controller) /* already registered at controller */
796 * Handle for controller process
798 struct GNUNET_TESTBED_ControllerProc
803 struct GNUNET_HELPER_Handle *helper;
806 * The arguments used to start the helper
811 * The host where the helper is run
813 struct GNUNET_TESTBED_Host *host;
816 * The controller error callback
818 GNUNET_TESTBED_ControllerStatusCallback cb;
821 * The closure for the above callback
826 * The send handle for the helper
828 struct GNUNET_HELPER_SendHandle *shandle;
831 * The message corresponding to send handle
833 struct GNUNET_MessageHeader *msg;
839 * Function to copy NULL terminated list of arguments
841 * @param argv the NULL terminated list of arguments. Cannot be NULL.
842 * @return the copied NULL terminated arguments
845 copy_argv (const char *const *argv)
850 GNUNET_assert (NULL != argv);
851 for (argp = 0; NULL != argv[argp]; argp++) ;
852 argv_dup = GNUNET_malloc (sizeof (char *) * (argp + 1));
853 for (argp = 0; NULL != argv[argp]; argp++)
854 argv_dup[argp] = strdup (argv[argp]);
860 * Function to join NULL terminated list of arguments
862 * @param argv1 the NULL terminated list of arguments. Cannot be NULL.
863 * @param argv2 the NULL terminated list of arguments. Cannot be NULL.
864 * @return the joined NULL terminated arguments
867 join_argv (const char *const *argv1, const char *const *argv2)
876 for (cnt = 0; NULL != argv1[cnt]; cnt++)
878 argv = GNUNET_strdup (argv1[cnt]);
879 GNUNET_array_append (argvj, carg, argv);
881 for (cnt = 0; NULL != argv2[cnt]; cnt++)
883 argv = GNUNET_strdup (argv2[cnt]);
884 GNUNET_array_append (argvj, carg, argv);
886 GNUNET_array_append (argvj, carg, NULL);
892 * Frees the given NULL terminated arguments
894 * @param argv the NULL terminated list of arguments
897 free_argv (char **argv)
901 for (argp = 0; NULL != argv[argp]; argp++)
902 GNUNET_free (argv[argp]);
908 * Generates arguments for opening a remote shell. Builds up the arguments
909 * from the environment variable GNUNET_TESTBED_RSH_CMD. The variable
910 * should not mention `-p' (port) option and destination address as these will
911 * be set locally in the function from its parameteres. If the environmental
912 * variable is not found then it defaults to `ssh -o BatchMode=yes -o
913 * NoHostAuthenticationForLocalhost=yes'
915 * @param port the destination port number
916 * @param dst the destination address
917 * @return NULL terminated list of arguments
920 gen_rsh_args (const char *port, const char *dst)
922 static const char *default_ssh_args[] = {
927 "NoHostAuthenticationForLocalhost=yes",
937 if (NULL != (ssh_cmd = getenv ("GNUNET_TESTBED_RSH_CMD")))
939 ssh_cmd = GNUNET_strdup (ssh_cmd);
940 ssh_cmd_cp = ssh_cmd;
941 for (cnt = 0; NULL != (arg = strtok (ssh_cmd, " ")); ssh_cmd = NULL)
942 GNUNET_array_append (ssh_args, cnt, GNUNET_strdup (arg));
943 GNUNET_free (ssh_cmd_cp);
947 ssh_args = copy_argv (default_ssh_args);
948 cnt = (sizeof (default_ssh_args)) / (sizeof (const char *));
949 GNUNET_array_grow (ssh_args, cnt, cnt - 1);
951 GNUNET_array_append (ssh_args, cnt, GNUNET_strdup ("-p"));
952 GNUNET_array_append (ssh_args, cnt, GNUNET_strdup (port));
953 GNUNET_array_append (ssh_args, cnt, GNUNET_strdup (dst));
954 GNUNET_array_append (ssh_args, cnt, NULL);
960 * Generates the arguments needed for executing the given binary in a remote
961 * shell. Builds the arguments from the environmental variable
962 * GNUNET_TETSBED_RSH_CMD_SUFFIX. If the environmental variable is not found,
963 * only the given binary name will be present in the returned arguments
965 * @param append_args the arguments to append after generating the suffix
966 * arguments. Can be NULL; if not must be NULL terminated 'char *' array
967 * @return NULL-terminated args
970 gen_rsh_suffix_args (const char * const *append_args)
977 unsigned int append_cnt;
981 if (NULL != (rshell_cmd = getenv ("GNUNET_TESTBED_RSH_CMD_SUFFIX")))
983 rshell_cmd = GNUNET_strdup (rshell_cmd);
984 rshell_cmd_cp = rshell_cmd;
985 for (; NULL != (arg = strtok (rshell_cmd, " ")); rshell_cmd = NULL)
986 GNUNET_array_append (rshell_args, cnt, GNUNET_strdup (arg));
987 GNUNET_free (rshell_cmd_cp);
989 if (NULL != append_args)
991 for (append_cnt = 0; NULL != append_args[append_cnt]; append_cnt++)
992 GNUNET_array_append (rshell_args, cnt, GNUNET_strdup (append_args[append_cnt]));
994 GNUNET_array_append (rshell_args, cnt, NULL);
1000 * Functions with this signature are called whenever a
1001 * complete message is received by the tokenizer.
1003 * Do not call GNUNET_SERVER_mst_destroy in callback
1005 * @param cls closure
1006 * @param client identification of the client
1007 * @param message the actual message
1009 * @return GNUNET_OK on success, GNUNET_SYSERR to stop further processing
1012 helper_mst (void *cls, void *client, const struct GNUNET_MessageHeader *message)
1014 struct GNUNET_TESTBED_ControllerProc *cp = cls;
1015 const struct GNUNET_TESTBED_HelperReply *msg;
1016 const char *hostname;
1019 uLongf xconfig_size;
1021 msg = (const struct GNUNET_TESTBED_HelperReply *) message;
1022 GNUNET_assert (sizeof (struct GNUNET_TESTBED_HelperReply) <
1023 ntohs (msg->header.size));
1024 GNUNET_assert (GNUNET_MESSAGE_TYPE_TESTBED_HELPER_REPLY ==
1025 ntohs (msg->header.type));
1026 config_size = (uLongf) ntohs (msg->config_size);
1028 (uLongf) (ntohs (msg->header.size) -
1029 sizeof (struct GNUNET_TESTBED_HelperReply));
1030 config = GNUNET_malloc (config_size);
1031 GNUNET_assert (Z_OK ==
1032 uncompress ((Bytef *) config, &config_size,
1033 (const Bytef *) &msg[1], xconfig_size));
1034 /* Replace the configuration template present in the host with the
1035 controller's running configuration */
1036 GNUNET_CONFIGURATION_destroy (cp->host->cfg);
1037 cp->host->cfg = GNUNET_CONFIGURATION_create ();
1038 GNUNET_assert (GNUNET_CONFIGURATION_deserialize
1039 (cp->host->cfg, config, config_size, GNUNET_NO));
1040 GNUNET_free (config);
1041 if (NULL == (hostname = GNUNET_TESTBED_host_get_hostname (cp->host)))
1042 hostname = "localhost";
1043 /* Change the hostname so that we can connect to it */
1044 GNUNET_CONFIGURATION_set_value_string (cp->host->cfg, "testbed", "hostname",
1046 cp->host->locked = GNUNET_NO;
1047 cp->host->controller_started = GNUNET_YES;
1048 cp->cb (cp->cls, cp->host->cfg, GNUNET_OK);
1054 * Continuation function from GNUNET_HELPER_send()
1056 * @param cls closure
1057 * @param result GNUNET_OK on success,
1058 * GNUNET_NO if helper process died
1059 * GNUNET_SYSERR during GNUNET_HELPER_stop
1062 clear_msg (void *cls, int result)
1064 struct GNUNET_TESTBED_ControllerProc *cp = cls;
1066 GNUNET_assert (NULL != cp->shandle);
1068 GNUNET_free (cp->msg);
1073 * Callback that will be called when the helper process dies. This is not called
1074 * when the helper process is stoped using GNUNET_HELPER_stop()
1076 * @param cls the closure from GNUNET_HELPER_start()
1079 helper_exp_cb (void *cls)
1081 struct GNUNET_TESTBED_ControllerProc *cp = cls;
1082 GNUNET_TESTBED_ControllerStatusCallback cb;
1088 GNUNET_TESTBED_controller_stop (cp);
1090 cb (cb_cls, NULL, GNUNET_SYSERR);
1095 * Starts a controller process at the given host. The given host's configration
1096 * is used as a Template configuration to use for the remote controller; the
1097 * remote controller will be started with a slightly modified configuration
1098 * (port numbers, unix domain sockets and service home values are changed as per
1099 * TESTING library on the remote host). The modified configuration replaces the
1100 * host's existing configuration before signalling success through the
1101 * GNUNET_TESTBED_ControllerStatusCallback()
1103 * @param trusted_ip the ip address of the controller which will be set as TRUSTED
1104 * HOST(all connections form this ip are permitted by the testbed) when
1105 * starting testbed controller at host. This can either be a single ip
1106 * address or a network address in CIDR notation.
1107 * @param host the host where the controller has to be started. CANNOT be NULL.
1108 * @param cb function called when the controller is successfully started or
1109 * dies unexpectedly; GNUNET_TESTBED_controller_stop shouldn't be
1110 * called if cb is called with GNUNET_SYSERR as status. Will never be
1111 * called in the same task as 'GNUNET_TESTBED_controller_start'
1112 * (synchronous errors will be signalled by returning NULL). This
1113 * parameter cannot be NULL.
1114 * @param cls closure for above callbacks
1115 * @return the controller process handle, NULL on errors
1117 struct GNUNET_TESTBED_ControllerProc *
1118 GNUNET_TESTBED_controller_start (const char *trusted_ip,
1119 struct GNUNET_TESTBED_Host *host,
1120 GNUNET_TESTBED_ControllerStatusCallback cb,
1123 struct GNUNET_TESTBED_ControllerProc *cp;
1124 struct GNUNET_TESTBED_HelperInit *msg;
1125 const struct GNUNET_CONFIGURATION_Handle *cfg;
1126 const char *hostname;
1127 static char *const binary_argv[] = {
1128 HELPER_TESTBED_BINARY, NULL
1131 GNUNET_assert (NULL != host);
1132 GNUNET_assert (NULL != (cfg = GNUNET_TESTBED_host_get_cfg_ (host)));
1134 API_VIOLATION (GNUNET_NO == host->locked,
1135 "Host is already locked by a previous call to GNUNET_TESTBED_controller_start()");
1136 host->locked = GNUNET_YES;
1137 API_VIOLATION (GNUNET_NO == host->controller_started,
1138 "Attempting to start a controller on a host which is already started a controller");
1139 cp = GNUNET_malloc (sizeof (struct GNUNET_TESTBED_ControllerProc));
1140 if (0 == GNUNET_TESTBED_host_get_id_ (host))
1143 GNUNET_HELPER_start (GNUNET_YES, HELPER_TESTBED_BINARY, binary_argv,
1144 &helper_mst, &helper_exp_cb, cp);
1148 char *helper_binary_path_args[2];
1150 char **rsh_suffix_args;
1151 const char *username;
1155 username = GNUNET_TESTBED_host_get_username_ (host);
1156 hostname = GNUNET_TESTBED_host_get_hostname (host);
1157 GNUNET_asprintf (&port, "%u", GNUNET_TESTBED_host_get_ssh_port_ (host));
1158 if (NULL == username)
1159 GNUNET_asprintf (&dst, "%s", hostname);
1161 GNUNET_asprintf (&dst, "%s@%s", username, hostname);
1162 LOG_DEBUG ("Starting SSH to destination %s\n", dst);
1165 GNUNET_CONFIGURATION_get_value_string (cfg, "testbed",
1166 "HELPER_BINARY_PATH",
1167 &helper_binary_path_args[0]))
1168 helper_binary_path_args[0] =
1169 GNUNET_OS_get_libexec_binary_path (HELPER_TESTBED_BINARY);
1170 helper_binary_path_args[1] = NULL;
1171 rsh_args = gen_rsh_args (port, dst);
1172 rsh_suffix_args = gen_rsh_suffix_args ((const char **) helper_binary_path_args);
1174 join_argv ((const char **) rsh_args, (const char **) rsh_suffix_args);
1175 free_argv (rsh_args);
1176 free_argv (rsh_suffix_args);
1180 GNUNET_HELPER_start (GNUNET_NO, cp->helper_argv[0], cp->helper_argv, &helper_mst,
1181 &helper_exp_cb, cp);
1182 GNUNET_free (helper_binary_path_args[0]);
1184 if (NULL == cp->helper)
1186 if (NULL != cp->helper_argv)
1187 free_argv (cp->helper_argv);
1194 msg = GNUNET_TESTBED_create_helper_init_msg_ (trusted_ip, hostname, cfg);
1195 cp->msg = &msg->header;
1197 GNUNET_HELPER_send (cp->helper, &msg->header, GNUNET_NO, &clear_msg, cp);
1198 if (NULL == cp->shandle)
1201 GNUNET_TESTBED_controller_stop (cp);
1209 * Sends termination signal to the controller's helper process
1211 * @param cproc the handle to the controller's helper process
1214 GNUNET_TESTBED_controller_kill_ (struct GNUNET_TESTBED_ControllerProc *cproc)
1216 if (NULL != cproc->shandle)
1217 GNUNET_HELPER_send_cancel (cproc->shandle);
1218 if (NULL != cproc->helper)
1219 GNUNET_HELPER_kill (cproc->helper, GNUNET_YES);
1224 * Cleans-up the controller's helper process handle
1226 * @param cproc the handle to the controller's helper process
1229 GNUNET_TESTBED_controller_destroy_ (struct GNUNET_TESTBED_ControllerProc *cproc)
1231 if (NULL != cproc->helper)
1233 GNUNET_break (GNUNET_OK == GNUNET_HELPER_wait (cproc->helper));
1234 GNUNET_HELPER_destroy (cproc->helper);
1236 if (NULL != cproc->helper_argv)
1237 free_argv (cproc->helper_argv);
1238 cproc->host->controller_started = GNUNET_NO;
1239 cproc->host->locked = GNUNET_NO;
1240 GNUNET_free (cproc);
1245 * Stop the controller process (also will terminate all peers and controllers
1246 * dependent on this controller). This function blocks until the testbed has
1247 * been fully terminated (!). The controller status cb from
1248 * GNUNET_TESTBED_controller_start() will not be called.
1250 * @param cproc the controller process handle
1253 GNUNET_TESTBED_controller_stop (struct GNUNET_TESTBED_ControllerProc *cproc)
1255 GNUNET_TESTBED_controller_kill_ (cproc);
1256 GNUNET_TESTBED_controller_destroy_ (cproc);
1261 * The handle for whether a host is habitable or not
1263 struct GNUNET_TESTBED_HostHabitableCheckHandle
1268 const struct GNUNET_TESTBED_Host *host;
1271 * The callback to call once we have the status
1273 GNUNET_TESTBED_HostHabitableCallback cb;
1276 * The callback closure
1281 * The process handle for the SSH process
1283 struct GNUNET_OS_Process *auxp;
1286 * The arguments used to start the helper
1291 * Task id for the habitability check task
1293 GNUNET_SCHEDULER_TaskIdentifier habitability_check_task;
1296 * How long we wait before checking the process status. Should grow
1299 struct GNUNET_TIME_Relative wait_time;
1305 * Task for checking whether a host is habitable or not
1307 * @param cls GNUNET_TESTBED_HostHabitableCheckHandle
1308 * @param tc the scheduler task context
1311 habitability_check (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1313 struct GNUNET_TESTBED_HostHabitableCheckHandle *h = cls;
1315 GNUNET_TESTBED_HostHabitableCallback cb;
1316 const struct GNUNET_TESTBED_Host *host;
1318 enum GNUNET_OS_ProcessStatusType type;
1321 h->habitability_check_task = GNUNET_SCHEDULER_NO_TASK;
1322 ret = GNUNET_OS_process_status (h->auxp, &type, &code);
1323 if (GNUNET_SYSERR == ret)
1329 if (GNUNET_NO == ret)
1331 h->wait_time = GNUNET_TIME_STD_BACKOFF (h->wait_time);
1332 h->habitability_check_task =
1333 GNUNET_SCHEDULER_add_delayed (h->wait_time, &habitability_check, h);
1336 GNUNET_OS_process_destroy (h->auxp);
1338 ret = (0 != code) ? GNUNET_NO : GNUNET_YES;
1341 if (NULL != h->auxp)
1342 GNUNET_OS_process_destroy (h->auxp);
1346 free_argv (h->helper_argv);
1349 cb (cb_cls, host, ret);
1354 * Checks whether a host can be used to start testbed service
1356 * @param host the host to check
1357 * @param config the configuration handle to lookup the path of the testbed
1359 * @param cb the callback to call to inform about habitability of the given host
1360 * @param cb_cls the closure for the callback
1361 * @return NULL upon any error or a handle which can be passed to
1362 * GNUNET_TESTBED_is_host_habitable_cancel()
1364 struct GNUNET_TESTBED_HostHabitableCheckHandle *
1365 GNUNET_TESTBED_is_host_habitable (const struct GNUNET_TESTBED_Host *host,
1366 const struct GNUNET_CONFIGURATION_Handle
1368 GNUNET_TESTBED_HostHabitableCallback cb,
1371 struct GNUNET_TESTBED_HostHabitableCheckHandle *h;
1373 char **rsh_suffix_args;
1375 const char *hostname;
1379 h = GNUNET_malloc (sizeof (struct GNUNET_TESTBED_HostHabitableCheckHandle));
1383 hostname = (NULL == host->hostname) ? "127.0.0.1" : host->hostname;
1384 if (NULL == host->username)
1385 dst = GNUNET_strdup (hostname);
1387 GNUNET_asprintf (&dst, "%s@%s", host->username, hostname);
1389 GNUNET_CONFIGURATION_get_value_string (config, "testbed",
1390 "HELPER_BINARY_PATH",
1393 GNUNET_OS_get_libexec_binary_path (HELPER_TESTBED_BINARY);
1394 GNUNET_asprintf (&port, "%u", host->port);
1395 rsh_args = gen_rsh_args (port, dst);
1400 stat_args[0] = "stat";
1401 stat_args[2] = NULL;
1402 rsh_suffix_args = gen_rsh_suffix_args ((const char **) stat_args);
1403 GNUNET_free (stat_args[1]);
1404 h->helper_argv = join_argv ((const char **) rsh_args,
1405 (const char **) rsh_suffix_args);
1406 free_argv (rsh_suffix_args);
1407 free_argv (rsh_args);
1409 GNUNET_OS_start_process_vap (GNUNET_NO, GNUNET_OS_INHERIT_STD_ERR, NULL,
1410 NULL, h->helper_argv[0], h->helper_argv);
1411 if (NULL == h->auxp)
1413 GNUNET_break (0); /* Cannot exec SSH? */
1417 h->wait_time = GNUNET_TIME_STD_BACKOFF (h->wait_time);
1418 h->habitability_check_task =
1419 GNUNET_SCHEDULER_add_delayed (h->wait_time, &habitability_check, h);
1425 * Function to cancel a request started using GNUNET_TESTBED_is_host_habitable()
1427 * @param handle the habitability check handle
1430 GNUNET_TESTBED_is_host_habitable_cancel (struct
1431 GNUNET_TESTBED_HostHabitableCheckHandle
1434 GNUNET_SCHEDULER_cancel (handle->habitability_check_task);
1435 (void) GNUNET_OS_process_kill (handle->auxp, SIGTERM);
1436 (void) GNUNET_OS_process_wait (handle->auxp);
1437 GNUNET_OS_process_destroy (handle->auxp);
1438 free_argv (handle->helper_argv);
1439 GNUNET_free (handle);
1444 * handle for host registration
1446 struct GNUNET_TESTBED_HostRegistrationHandle
1449 * The host being registered
1451 struct GNUNET_TESTBED_Host *host;
1454 * The controller at which this host is being registered
1456 struct GNUNET_TESTBED_Controller *c;
1459 * The Registartion completion callback
1461 GNUNET_TESTBED_HostRegistrationCompletion cc;
1464 * The closure for above callback
1471 * Register a host with the controller
1473 * @param controller the controller handle
1474 * @param host the host to register
1475 * @param cc the completion callback to call to inform the status of
1476 * registration. After calling this callback the registration handle
1477 * will be invalid. Cannot be NULL.
1478 * @param cc_cls the closure for the cc
1479 * @return handle to the host registration which can be used to cancel the
1482 struct GNUNET_TESTBED_HostRegistrationHandle *
1483 GNUNET_TESTBED_register_host (struct GNUNET_TESTBED_Controller *controller,
1484 struct GNUNET_TESTBED_Host *host,
1485 GNUNET_TESTBED_HostRegistrationCompletion cc,
1488 struct GNUNET_TESTBED_HostRegistrationHandle *rh;
1489 struct GNUNET_TESTBED_AddHostMessage *msg;
1490 const char *username;
1491 const char *hostname;
1498 uint16_t username_length;
1499 uint16_t hostname_length;
1501 if (NULL != controller->rh)
1503 hostname = GNUNET_TESTBED_host_get_hostname (host);
1504 if (GNUNET_YES == GNUNET_TESTBED_is_host_registered_ (host, controller))
1506 LOG (GNUNET_ERROR_TYPE_WARNING, "Host hostname: %s already registered\n",
1507 (NULL == hostname) ? "localhost" : hostname);
1510 rh = GNUNET_malloc (sizeof (struct GNUNET_TESTBED_HostRegistrationHandle));
1513 GNUNET_assert (NULL != cc);
1515 rh->cc_cls = cc_cls;
1516 controller->rh = rh;
1517 username = GNUNET_TESTBED_host_get_username_ (host);
1518 username_length = 0;
1519 if (NULL != username)
1520 username_length = strlen (username);
1521 GNUNET_assert (NULL != hostname); /* Hostname must be present */
1522 hostname_length = strlen (hostname);
1523 GNUNET_assert (NULL != host->cfg);
1524 config = GNUNET_CONFIGURATION_serialize (host->cfg, &config_size);
1525 cc_size = GNUNET_TESTBED_compress_config_ (config, config_size, &cconfig);
1526 GNUNET_free (config);
1527 msg_size = (sizeof (struct GNUNET_TESTBED_AddHostMessage));
1528 msg_size += username_length;
1529 msg_size += hostname_length;
1530 msg_size += cc_size;
1531 msg = GNUNET_malloc (msg_size);
1532 msg->header.size = htons (msg_size);
1533 msg->header.type = htons (GNUNET_MESSAGE_TYPE_TESTBED_ADD_HOST);
1534 msg->host_id = htonl (GNUNET_TESTBED_host_get_id_ (host));
1535 msg->ssh_port = htons (GNUNET_TESTBED_host_get_ssh_port_ (host));
1537 if (NULL != username)
1539 msg->username_length = htons (username_length);
1540 ptr = memcpy (ptr, username, username_length);
1541 ptr += username_length;
1543 msg->hostname_length = htons (hostname_length);
1544 ptr = memcpy (ptr, hostname, hostname_length);
1545 ptr += hostname_length;
1546 msg->config_size = htons (config_size);
1547 ptr = memcpy (ptr, cconfig, cc_size);
1549 GNUNET_assert ((ptr - (void *) msg) == msg_size);
1550 GNUNET_free (cconfig);
1551 GNUNET_TESTBED_queue_message_ (controller,
1552 (struct GNUNET_MessageHeader *) msg);
1558 * Cancel the pending registration. Note that if the registration message is
1559 * already sent to the service the cancellation has only the effect that the
1560 * registration completion callback for the registration is never called.
1562 * @param handle the registration handle to cancel
1565 GNUNET_TESTBED_cancel_registration (struct GNUNET_TESTBED_HostRegistrationHandle
1568 if (handle != handle->c->rh)
1573 handle->c->rh = NULL;
1574 GNUNET_free (handle);
1579 * Queues the given operation in the queue for parallel overlay connects of the
1582 * @param h the host handle
1583 * @param op the operation to queue in the given host's parally overlay connect
1587 GNUNET_TESTBED_host_queue_oc_ (struct GNUNET_TESTBED_Host *h,
1588 struct GNUNET_TESTBED_Operation *op)
1590 GNUNET_TESTBED_operation_queue_insert_
1591 (h->opq_parallel_overlay_connect_operations, op);
1596 * Handler for GNUNET_MESSAGE_TYPE_TESTBED_ADDHOSTCONFIRM message from
1597 * controller (testbed service)
1599 * @param c the controller handler
1600 * @param msg message received
1601 * @return GNUNET_YES if we can continue receiving from service; GNUNET_NO if
1605 GNUNET_TESTBED_host_handle_addhostconfirm_ (struct GNUNET_TESTBED_Controller *c,
1607 GNUNET_TESTBED_HostConfirmedMessage
1610 struct GNUNET_TESTBED_HostRegistrationHandle *rh;
1619 if (GNUNET_TESTBED_host_get_id_ (rh->host) != ntohl (msg->host_id))
1621 LOG_DEBUG ("Mismatch in host id's %u, %u of host confirm msg\n",
1622 GNUNET_TESTBED_host_get_id_ (rh->host), ntohl (msg->host_id));
1626 msg_size = ntohs (msg->header.size);
1627 if (sizeof (struct GNUNET_TESTBED_HostConfirmedMessage) == msg_size)
1629 LOG_DEBUG ("Host %u successfully registered\n", ntohl (msg->host_id));
1630 GNUNET_TESTBED_mark_host_registered_at_ (rh->host, c);
1631 rh->cc (rh->cc_cls, NULL);
1635 /* We have an error message */
1636 emsg = (char *) &msg[1];
1638 emsg[msg_size - sizeof (struct GNUNET_TESTBED_HostConfirmedMessage)])
1644 LOG (GNUNET_ERROR_TYPE_ERROR, _("Adding host %u failed with error: %s\n"),
1645 ntohl (msg->host_id), emsg);
1646 rh->cc (rh->cc_cls, emsg);
1653 * Resolves the hostname of the host to an ip address
1655 * @param host the host whose hostname is to be resolved
1658 GNUNET_TESTBED_host_resolve_ (struct GNUNET_TESTBED_Host *host)
1662 hostname = (char *) host->hostname;
1663 host->hostname = simple_resolve (hostname);
1664 if (NULL == host->hostname)
1667 host->hostname = hostname;
1670 GNUNET_free (hostname);
1671 host->hostname = GNUNET_strdup (host->hostname);
1674 /* end of testbed_api_hosts.c */