2 This file is part of GNUnet.
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 sensor/gnunet-service-sensor.c
23 * @brief sensor service implementation
24 * @author Omar Tarabai
28 #include "gnunet_util_lib.h"
30 #include "gnunet_statistics_service.h"
33 * Minimum sensor execution interval (in seconds)
35 #define MIN_INTERVAL 30
38 * Structure containing sensor definition
49 * Path to definition file
54 * First part of version number
56 uint16_t version_major;
59 * Second part of version number
61 uint16_t version_minor;
69 * Sensor currently enabled
74 * Category under which the sensor falls (e.g. tcp, datastore)
79 * When does the sensor become active
81 struct GNUNET_TIME_Absolute *start_time;
84 * When does the sensor expire
86 struct GNUNET_TIME_Absolute *end_time;
89 * Time interval to collect sensor information (e.g. every 1 min)
91 struct GNUNET_TIME_Relative interval;
94 * Lifetime of an information sample after which it is deleted from storage
96 struct GNUNET_TIME_Relative lifetime;
99 * A set of required peer capabilities for the sensor to collect meaningful information (e.g. ipv6)
104 * Either "gnunet-statistics" or external "process"
109 * Name of the GNUnet service that is the source for the gnunet-statistics entry
111 char *gnunet_stat_service;
114 * Name of the gnunet-statistics entry
116 char *gnunet_stat_name;
119 * Handle to statistics get request (OR GNUNET_SCHEDULER_NO_TASK)
121 struct GNUNET_STATISTICS_GetHandle *gnunet_stat_get_handle;
124 * Name of the external process to be executed
129 * Arguments to be passed to the external process
134 * The output datatype to be expected
136 char *expected_datatype;
139 * Peer-identity of peer running collection point
141 struct GNUNET_PeerIdentity *collection_point;
144 * Time interval to send sensor information to collection point (e.g. every 30 mins)
146 struct GNUNET_TIME_Relative *collection_interval;
149 * Flag specifying if value is to be communicated to the p2p network
154 * Time interval to communicate value to the p2p network
156 struct GNUNET_TIME_Relative *p2p_interval;
159 * Execution task (OR GNUNET_SCHEDULER_NO_TASK)
161 GNUNET_SCHEDULER_TaskIdentifier execution_task;
164 * Is the sensor being executed
173 static const struct GNUNET_CONFIGURATION_Handle *cfg;
176 * Hashmap of loaded sensor definitions
178 struct GNUNET_CONTAINER_MultiHashMap *sensors;
181 * Supported sources of sensor information
183 static const char *sources[] = { "gnunet-statistics", "process", NULL };
186 * Supported datatypes of sensor information
188 static const char *datatypes[] = { "uint64", "double", "string", NULL };
191 * Handle to statistics service
193 struct GNUNET_STATISTICS_Handle *statistics;
196 * Remove sensor execution from scheduler
199 * @param key hash of sensor name, key to hashmap
200 * @param value a 'struct SensorInfo *'
201 * @return #GNUNET_YES if we should continue to
205 int destroy_sensor(void *cls,
206 const struct GNUNET_HashCode *key, void *value)
208 struct SensorInfo *sensorinfo = value;
210 if(NULL != sensorinfo->gnunet_stat_get_handle)
212 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Canceling a statistics get request for sensor `%s'\n", sensorinfo->name);
213 GNUNET_STATISTICS_get_cancel(sensorinfo->gnunet_stat_get_handle);
215 if(GNUNET_SCHEDULER_NO_TASK != sensorinfo->execution_task)
217 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Unscheduling sensor `%s'\n", sensorinfo->name);
218 GNUNET_SCHEDULER_cancel(sensorinfo->execution_task);
219 sensorinfo->execution_task = GNUNET_SCHEDULER_NO_TASK;
221 GNUNET_free(sensorinfo);
226 * Task run during shutdown.
232 shutdown_task (void *cls,
233 const struct GNUNET_SCHEDULER_TaskContext *tc)
235 GNUNET_CONTAINER_multihashmap_iterate(sensors, &destroy_sensor, NULL);
236 GNUNET_CONTAINER_multihashmap_destroy(sensors);
237 if(NULL != statistics)
238 GNUNET_STATISTICS_destroy(statistics, GNUNET_YES);
239 GNUNET_SCHEDULER_shutdown();
244 * A client disconnected. Remove all of its data structure entries.
246 * @param cls closure, NULL
247 * @param client identification of the client
250 handle_client_disconnect (void *cls,
251 struct GNUNET_SERVER_Client
257 * Parses a version number string into major and minor
259 * @param version full version string
260 * @param major pointer to parsed major value
261 * @param minor pointer to parsed minor value
262 * @return #GNUNET_OK if parsing went ok, #GNUNET_SYSERROR in case of error
265 version_parse(char *version, uint16_t *major, uint16_t *minor)
270 for(; isdigit(*version); version++)
273 majorval += *version - '0';
276 return GNUNET_SYSERR;
278 for(; isdigit(*version); version++)
281 minorval += *version - '0';
284 return GNUNET_SYSERR;
292 * Load sensor definition from configuration
294 * @param cfg configuration handle
295 * @param sectionname configuration section containing definition
297 static struct SensorInfo *
298 load_sensor_from_cfg(struct GNUNET_CONFIGURATION_Handle *cfg, const char *sectionname)
300 struct SensorInfo *sensor;
304 unsigned long long time_sec;
306 sensor = GNUNET_new(struct SensorInfo);
308 sensor->name = GNUNET_strdup(sectionname);
310 if(GNUNET_OK != GNUNET_CONFIGURATION_get_value_string(cfg, sectionname, "VERSION", &version_str))
312 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Error reading sensor version\n"));
316 if(GNUNET_OK != version_parse(version_str, &(sensor->version_major), &(sensor->version_minor)))
318 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Invalid sensor version number, format should be major.minor\n"));
320 GNUNET_free(version_str);
323 GNUNET_free(version_str);
325 GNUNET_CONFIGURATION_get_value_string(cfg, sectionname, "DESCRIPTION", &sensor->description);
327 if(GNUNET_OK != GNUNET_CONFIGURATION_get_value_string(cfg, sectionname, "CATEGORY", &sensor->category) ||
328 NULL == sensor->category)
330 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Error reading sensor category\n"));
335 if(GNUNET_NO == GNUNET_CONFIGURATION_get_value_yesno(cfg, sectionname, "ENABLED"))
336 sensor->enabled = GNUNET_NO;
338 sensor->enabled = GNUNET_YES;
340 sensor->start_time = NULL;
341 if(GNUNET_OK == GNUNET_CONFIGURATION_get_value_string(cfg, sectionname, "START_TIME", &starttime_str))
343 GNUNET_STRINGS_fancy_time_to_absolute(starttime_str, sensor->start_time);
344 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Start time loaded: `%s'. Parsed: %d\n", starttime_str, (NULL != sensor->start_time));
345 GNUNET_free(starttime_str);
348 sensor->end_time = NULL;
349 if(GNUNET_OK == GNUNET_CONFIGURATION_get_value_string(cfg, sectionname, "END_TIME", &endtime_str))
351 GNUNET_STRINGS_fancy_time_to_absolute(endtime_str, sensor->end_time);
352 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "End time loaded: `%s'. Parsed: %d\n", endtime_str, (NULL != sensor->end_time));
353 GNUNET_free(endtime_str);
356 if(GNUNET_OK != GNUNET_CONFIGURATION_get_value_number(cfg, sectionname, "INTERVAL", &time_sec))
358 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Error reading sensor run interval\n"));
362 if(time_sec < MIN_INTERVAL)
364 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Sensor run interval too low (%" PRIu64 " < %d)\n"),
365 time_sec, MIN_INTERVAL);
369 sensor->interval = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, time_sec);
371 if(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, sectionname, "LIFETIME", &time_sec))
373 sensor->lifetime = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, time_sec);
376 sensor->lifetime = GNUNET_TIME_UNIT_FOREVER_REL;
379 if(GNUNET_OK != GNUNET_CONFIGURATION_get_value_choice(cfg, sectionname, "SOURCE", sources, (const char **)&sensor->source))
381 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Error reading sensor source\n"));
385 if(sources[0] == sensor->source) //gnunet-statistics
387 if(GNUNET_OK != GNUNET_CONFIGURATION_get_value_string(cfg, sectionname, "GNUNET_STAT_SERVICE", &sensor->gnunet_stat_service) ||
388 GNUNET_OK != GNUNET_CONFIGURATION_get_value_string(cfg, sectionname, "GNUNET_STAT_NAME", &sensor->gnunet_stat_name))
390 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Error reading sensor gnunet-statistics source information\n"));
394 sensor->gnunet_stat_get_handle = NULL;
396 else if(sources[1] == sensor->source) //process
398 if(GNUNET_OK != GNUNET_CONFIGURATION_get_value_string(cfg, sectionname, "EXT_PROCESS", &sensor->ext_process))
400 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Error reading sensor process name\n"));
404 GNUNET_CONFIGURATION_get_value_string(cfg, sectionname, "EXT_ARGS", &sensor->ext_args);
407 if(GNUNET_OK != GNUNET_CONFIGURATION_get_value_choice(cfg, sectionname, "EXPECTED_DATATYPE", datatypes, (const char **)&sensor->expected_datatype))
409 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Error reading sensor expected datatype\n"));
413 if(sources[0] == sensor->source && datatypes[0] != sensor->expected_datatype)
415 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Invalid expected datatype, gnunet-statistics returns uint64 values\n"));
419 //TODO: reporting mechanism
421 sensor->execution_task = GNUNET_SCHEDULER_NO_TASK;
423 sensor->running = GNUNET_NO;
429 * Load sensor definition from file
431 * @param filename full path to file containing sensor definition
433 static struct SensorInfo *
434 load_sensor_from_file(const char *filename)
436 struct GNUNET_CONFIGURATION_Handle *sensorcfg;
437 const char *filebasename;
438 struct SensorInfo *sensor;
441 if(GNUNET_YES != GNUNET_DISK_file_test(filename))
443 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Failed to access sensor file: %s\n"), filename);
446 //load file as configuration
447 sensorcfg = GNUNET_CONFIGURATION_create();
448 if(GNUNET_SYSERR == GNUNET_CONFIGURATION_parse(sensorcfg, filename))
450 GNUNET_CONFIGURATION_destroy(sensorcfg);
451 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Failed to load sensor definition: %s\n"), filename);
454 //configuration section should be the same as filename
455 filebasename = GNUNET_STRINGS_get_short_name(filename);
456 sensor = load_sensor_from_cfg(sensorcfg, filebasename);
457 sensor->def_file = GNUNET_strdup(filename);
459 GNUNET_CONFIGURATION_destroy(sensorcfg);
465 * Compares version numbers of two sensors
467 * @param s1 first sensor
468 * @param s2 second sensor
469 * @return 1: s1 > s2, 0: s1 == s2, -1: s1 < s2
472 sensor_version_compare(struct SensorInfo *s1, struct SensorInfo *s2)
474 if(s1->version_major == s2->version_major)
475 return (s1->version_minor < s2->version_minor) ? -1 : (s1->version_minor > s2->version_minor);
477 return (s1->version_major < s2->version_major) ? -1 : (s1->version_major > s2->version_major);
481 * Adds a new sensor to given hashmap.
482 * If the same name exist, compares versions and update if old.
484 * @param sensor Sensor structure to add
485 * @param map Hashmap to add to
486 * @return #GNUNET_YES if added, #GNUNET_NO if not added which is not necessarily an error
489 add_sensor_to_hashmap(struct SensorInfo *sensor, struct GNUNET_CONTAINER_MultiHashMap *map)
491 struct GNUNET_HashCode key;
492 struct SensorInfo *existing;
494 GNUNET_CRYPTO_hash(sensor->name, strlen(sensor->name), &key);
495 existing = GNUNET_CONTAINER_multihashmap_get(map, &key);
496 if(NULL != existing) //sensor with same name already exists
498 if(sensor_version_compare(existing, sensor) >= 0) //same or newer version already exist
500 GNUNET_log(GNUNET_ERROR_TYPE_INFO, _("Sensor `%s' already exists with same or newer version\n"), sensor->name);
505 GNUNET_CONTAINER_multihashmap_remove(map, &key, existing); //remove the old version
506 GNUNET_free(existing);
507 GNUNET_log(GNUNET_ERROR_TYPE_INFO, _("Upgrading sensor `%s' to a newer version\n"), sensor->name);
510 if(GNUNET_SYSERR == GNUNET_CONTAINER_multihashmap_put(map, &key, sensor, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
512 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Error adding new sensor `%s' to global hashmap, this should not happen\n"), sensor->name);
520 * Iterating over files in sensors directory
523 * @param filename complete filename (absolute path)
524 * @return #GNUNET_OK to continue to iterate
527 reload_sensors_dir_cb(void *cls, const char *filename)
529 struct SensorInfo *sensor;
531 if(GNUNET_YES != GNUNET_DISK_file_test(filename))
533 sensor = load_sensor_from_file(filename);
536 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("Error loading sensor from file: %s\n"), filename);
539 if(GNUNET_YES == add_sensor_to_hashmap(sensor, sensors))
540 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, _("Sensor `%s' added to global hashmap\n"), sensor->name);
542 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, ("Could not add sensor `%s' to global hashmap\n"), sensor->name);
548 * Get path to the directory containing the sensor definition files
550 * @return sensor files directory
558 datadir = GNUNET_OS_installation_get_path(GNUNET_OS_IPK_DATADIR);
559 GNUNET_asprintf(&sensordir, "%ssensors%s",
560 datadir, DIR_SEPARATOR_STR);
566 * Reads sensor definitions from data files
574 sensordir = get_sensor_dir();
575 GNUNET_log(GNUNET_ERROR_TYPE_INFO, _("Reloading sensor definitions from directory `%s'\n"), sensordir);
576 GNUNET_assert(GNUNET_YES == GNUNET_DISK_directory_test(sensordir, GNUNET_YES));
578 //read all files in sensors directory
579 GNUNET_DISK_directory_scan(sensordir, &reload_sensors_dir_cb, NULL);
580 GNUNET_log(GNUNET_ERROR_TYPE_INFO, _("Loaded %d sensors from directory `%s'\n"),
581 GNUNET_CONTAINER_multihashmap_size(sensors), sensordir);
585 * Creates a structure with basic sensor info to be sent to a client
587 * @param sensor sensor information
588 * @return message ready to be sent to client
590 static struct SensorInfoMessage *
591 create_sensor_info_msg(struct SensorInfo *sensor)
593 struct SensorInfoMessage *msg;
599 name_len = strlen(sensor->name);
600 if(NULL == sensor->description)
603 desc_len = strlen(sensor->description) + 1;
605 len += sizeof(struct SensorInfoMessage);
608 msg = GNUNET_malloc(len);
609 msg->header.size = htons(len);
610 msg->header.type = htons(GNUNET_MESSAGE_TYPE_SENSOR_INFO);
611 msg->name_len = htons(name_len);
612 msg->description_len = htons(desc_len);
613 msg->version_major = htons(sensor->version_major);
614 msg->version_minor = htons(sensor->version_minor);
615 str_ptr = (char*) &msg[1];
616 memcpy(str_ptr, sensor->name, name_len);
617 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending sensor name (%d): %.*s\n",
618 name_len, name_len, str_ptr);
620 memcpy(str_ptr, sensor->description, desc_len);
621 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Sending sensor description (%d): %.*s\n",
622 desc_len, desc_len, str_ptr);
628 * Handle GET SENSOR message.
631 * @param client identification of the client
632 * @param message the actual message
635 handle_get_sensor (void *cls, struct GNUNET_SERVER_Client *client,
636 const struct GNUNET_MessageHeader *message)
638 struct GNUNET_SERVER_TransmitContext *tc;
640 size_t sensorname_len;
641 struct GNUNET_HashCode key;
642 struct SensorInfo *sensorinfo;
643 struct SensorInfoMessage *msg;
645 sensorname = (char *)&message[1];
646 sensorname_len = ntohs(message->size) - sizeof(struct GNUNET_MessageHeader);
647 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "`%s' message received for sensor (%d) `%.*s'\n",
648 "GET SENSOR", sensorname_len, sensorname_len, sensorname);
649 tc = GNUNET_SERVER_transmit_context_create (client);
650 GNUNET_CRYPTO_hash(sensorname, sensorname_len, &key);
651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Created key hash for requested sensor\n");
652 sensorinfo = (struct SensorInfo *)GNUNET_CONTAINER_multihashmap_get(sensors, &key);
653 if(NULL != sensorinfo)
655 msg = create_sensor_info_msg(sensorinfo);
656 GNUNET_SERVER_transmit_context_append_message(tc, (struct GNUNET_MessageHeader *)msg);
660 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Requested sensor `%.*s' was not found\n",
661 sensorname_len, sensorname);
662 GNUNET_SERVER_transmit_context_append_data(tc, NULL, 0, GNUNET_MESSAGE_TYPE_SENSOR_END);
663 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
667 * Iterator for sensors and adds them to transmit context
669 * @param cls a 'struct GNUNET_SERVER_TransmitContext *'
670 * @param key hash of sensor name, key to hashmap
671 * @param value a 'struct SensorInfo *'
673 int add_sensor_to_tc(void *cls,
674 const struct GNUNET_HashCode *key, void *value)
676 struct GNUNET_SERVER_TransmitContext *tc = cls;
677 struct SensorInfo *sensorinfo = value;
678 struct SensorInfoMessage *msg;
680 msg = create_sensor_info_msg(sensorinfo);
681 GNUNET_SERVER_transmit_context_append_message(tc, (struct GNUNET_MessageHeader *)msg);
689 * Handle GET ALL SENSORS message.
692 * @param client identification of the client
693 * @param message the actual message
696 handle_get_all_sensors (void *cls, struct GNUNET_SERVER_Client *client,
697 const struct GNUNET_MessageHeader *message)
699 struct GNUNET_SERVER_TransmitContext *tc;
701 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "`%s' message received.\n",
703 tc = GNUNET_SERVER_transmit_context_create (client);
704 GNUNET_CONTAINER_multihashmap_iterate(sensors, &add_sensor_to_tc, tc);
705 GNUNET_SERVER_transmit_context_append_data(tc, NULL, 0, GNUNET_MESSAGE_TYPE_SENSOR_END);
706 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
710 * Do a series of checks to determine if sensor should execute
712 * @return #GNUNET_YES / #GNUNET_NO
715 should_run_sensor(struct SensorInfo *sensorinfo)
717 //FIXME: some checks should disable the sensor (e.g. expired)
718 struct GNUNET_TIME_Absolute now;
720 if(GNUNET_NO == sensorinfo->enabled)
722 GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Sensor `%s' is disabled, will not run\n", sensorinfo->name);
725 now = GNUNET_TIME_absolute_get();
726 if(NULL != sensorinfo->start_time
727 && now.abs_value_us < sensorinfo->start_time->abs_value_us)
729 GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Start time for sensor `%s' not reached yet, will not run\n", sensorinfo->name);
732 if(NULL != sensorinfo->end_time
733 && now.abs_value_us >= sensorinfo->end_time->abs_value_us)
735 GNUNET_log(GNUNET_ERROR_TYPE_INFO, "End time for sensor `%s' passed, will not run\n", sensorinfo->name);
742 * Callback function to process statistic values
744 * @param cls 'struct SensorInfo *'
745 * @param subsystem name of subsystem that created the statistic
746 * @param name the name of the datum
747 * @param value the current value
748 * @param is_persistent #GNUNET_YES if the value is persistent, #GNUNET_NO if not
749 * @return #GNUNET_OK to continue, #GNUNET_SYSERR to abort iteration
751 int sensor_statistics_iterator (void *cls,
752 const char *subsystem,
757 struct SensorInfo *sensorinfo = cls;
759 GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Received a value for sensor `%s': %" PRIu64 "\n", sensorinfo->name, value);
764 * Continuation called after sensor gets all gnunet statistics values
766 * @param cls 'struct SensorInfo *'
767 * @param success #GNUNET_OK if statistics were
768 * successfully obtained, #GNUNET_SYSERR if not.
770 void end_sensor_run_stat (void *cls, int success)
772 struct SensorInfo *sensorinfo = cls;
774 sensorinfo->gnunet_stat_get_handle = NULL;
775 sensorinfo->running = GNUNET_NO;
779 * Callback for output of executed sensor process
781 * @param cls 'struct SensorInfo *'
782 * @param line line of output from a command, NULL for the end
784 void sensor_process_callback (void *cls, const char *line)
786 struct SensorInfo *sensorinfo = cls;
790 sensorinfo->running = GNUNET_NO;
793 GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Received a value for sensor `%s': %s\n", sensorinfo->name, line);
797 * Actual execution of a sensor
799 * @param cls 'struct SensorInfo'
803 sensor_run (void *cls,
804 const struct GNUNET_SCHEDULER_TaskContext * tc)
806 struct SensorInfo *sensorinfo = cls;
811 sensorinfo->execution_task = GNUNET_SCHEDULER_add_delayed(sensorinfo->interval, &sensor_run, sensorinfo);
812 if(GNUNET_YES == sensorinfo->running) //FIXME: should we try to kill?
814 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Sensor `%s' running for too long, will try again next interval\n", sensorinfo->name);
817 if(GNUNET_NO == should_run_sensor(sensorinfo))
819 sensorinfo->running = GNUNET_YES;
820 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Starting the execution of sensor `%s'\n", sensorinfo->name);
821 if(sources[0] == sensorinfo->source) //gnunet-statistics
823 if(NULL == statistics)
825 statistics = GNUNET_STATISTICS_create("sensor", cfg);
827 sensorinfo->gnunet_stat_get_handle = GNUNET_STATISTICS_get(statistics,
828 sensorinfo->gnunet_stat_service,
829 sensorinfo->gnunet_stat_name,
830 sensorinfo->interval, //try to get values only for the interval of the sensor
831 &end_sensor_run_stat,
832 &sensor_statistics_iterator,
835 else if(sources[1] == sensorinfo->source)
837 //FIXME: break execution if process is a path
838 //check if the process exists in $PATH
839 process_path = GNUNET_strdup(sensorinfo->ext_process);
841 GNUNET_OS_check_helper_binary(sensorinfo->ext_process, GNUNET_NO, NULL); //search in $PATH
842 if(GNUNET_SYSERR == check_result)
844 //search in sensor directory
845 sensors_dir = get_sensor_dir();
846 GNUNET_free(process_path);
847 GNUNET_asprintf(&process_path, "%s%s-files%s%s",
851 sensorinfo->ext_process);
852 GNUNET_free(sensors_dir);
854 GNUNET_OS_check_helper_binary(process_path, GNUNET_NO, NULL);
856 if(GNUNET_SYSERR == check_result)
858 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Sensor `%s' process `%s' problem: binary doesn't exist or not executable\n",
860 sensorinfo->ext_process);
861 //FIXME: disable sensor here?
862 sensorinfo->running = GNUNET_NO;
863 GNUNET_free(process_path);
866 GNUNET_OS_command_run(&sensor_process_callback,
868 GNUNET_TIME_UNIT_FOREVER_REL,
870 sensorinfo->ext_process,
871 sensorinfo->ext_args,
873 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Process started for sensor `%s'\n", sensorinfo->name);
877 sensorinfo->running = GNUNET_NO;
878 GNUNET_break(0); //shouldn't happen
883 * Starts the execution of a sensor
886 * @param key hash of sensor name, key to hashmap (unused)
887 * @param value a 'struct SensorInfo *'
888 * @return #GNUNET_YES if we should continue to
892 int schedule_sensor(void *cls,
893 const struct GNUNET_HashCode *key, void *value)
895 struct SensorInfo *sensorinfo = value;
897 if(GNUNET_NO == should_run_sensor(sensorinfo))
899 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Scheduling sensor `%s' to run after %" PRIu64 " microseconds\n",
900 sensorinfo->name, sensorinfo->interval.rel_value_us);
901 if(GNUNET_SCHEDULER_NO_TASK != sensorinfo->execution_task)
903 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Sensor `%s' execution task already set, this should not happen\n", sensorinfo->name);
906 sensorinfo->execution_task = GNUNET_SCHEDULER_add_delayed(sensorinfo->interval, &sensor_run, sensorinfo);
911 * Starts the execution of all enabled sensors
915 schedule_all_sensors()
917 GNUNET_CONTAINER_multihashmap_iterate(sensors, &schedule_sensor, NULL);
921 * Process statistics requests.
924 * @param server the initialized server
925 * @param c configuration to use
929 struct GNUNET_SERVER_Handle *server,
930 const struct GNUNET_CONFIGURATION_Handle *c)
932 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
933 {&handle_get_sensor, NULL, GNUNET_MESSAGE_TYPE_SENSOR_GET,
935 {&handle_get_all_sensors, NULL, GNUNET_MESSAGE_TYPE_SENSOR_GETALL,
936 sizeof (struct GNUNET_MessageHeader)},
941 sensors = GNUNET_CONTAINER_multihashmap_create(10, GNUNET_NO);
943 schedule_all_sensors();
944 GNUNET_SERVER_add_handlers (server, handlers);
945 GNUNET_SERVER_disconnect_notify (server,
946 &handle_client_disconnect,
948 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
955 * The main function for the sensor service.
957 * @param argc number of arguments from the command line
958 * @param argv command line arguments
959 * @return 0 ok, 1 on error
962 main (int argc, char *const *argv)
965 GNUNET_SERVICE_run (argc,
968 GNUNET_SERVICE_OPTION_NONE,
969 &run, NULL)) ? 0 : 1;
972 /* end of gnunet-service-sensor.c */