2 This file is part of GNUnet.
3 (C) 2009, 2010, 2012, 2013 Christian Grothoff (and other contributing authors)
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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
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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.
23 * @brief API for accessing the ARM service
24 * @author Christian Grothoff
28 #include "gnunet_util_lib.h"
29 #include "gnunet_arm_service.h"
30 #include "gnunet_protocols.h"
33 #define LOG(kind,...) GNUNET_log_from (kind, "arm-api",__VA_ARGS__)
36 * Handle for interacting with ARM.
38 struct GNUNET_ARM_Handle
41 * Our control connection to the ARM service.
43 struct GNUNET_CLIENT_Connection *client;
46 * The configuration that we are using.
48 struct GNUNET_CONFIGURATION_Handle *cfg;
51 * Handle for our current transmission request.
53 struct GNUNET_CLIENT_TransmitHandle *cth;
56 * Head of doubly-linked list of pending requests.
58 struct ARMControlMessage *control_pending_head;
61 * Tail of doubly-linked list of pending requests.
63 struct ARMControlMessage *control_pending_tail;
66 * Head of doubly-linked list of sent requests.
68 struct ARMControlMessage *control_sent_head;
71 * Tail of doubly-linked list of sent requests.
73 struct ARMControlMessage *control_sent_tail;
76 * Callback to invoke on connection/disconnection.
78 GNUNET_ARM_ConnectionStatusCallback conn_status;
81 * Closure for conn_status.
83 void *conn_status_cls;
86 * ARM control message for the 'arm_termination_handler'
87 * with the continuation to call once the ARM shutdown is done.
89 struct ARMControlMessage *thm;
92 * ID of the reconnect task (if any).
94 GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
97 * Current delay we use for re-trying to connect to core.
99 struct GNUNET_TIME_Relative retry_backoff;
102 * Counter for request identifiers
104 uint64_t request_id_counter;
107 * Are we currently disconnected and hence unable to send?
109 unsigned char currently_down;
112 * GNUNET_YES if we're running a service test.
114 unsigned char service_test_is_active;
119 * Entry in a doubly-linked list of control messages to be transmitted
120 * to the arm service.
122 * The actual message is allocated at the end of this struct.
124 struct ARMControlMessage
127 * This is a doubly-linked list.
129 struct ARMControlMessage *next;
132 * This is a doubly-linked list.
134 struct ARMControlMessage *prev;
139 struct GNUNET_ARM_Handle *h;
144 struct GNUNET_ARM_Message *msg;
147 * Callback for service state change requests.
149 GNUNET_ARM_ResultCallback result_cont;
152 * Callback for service list requests.
154 GNUNET_ARM_ServiceListCallback list_cont;
157 * Closure for 'result_cont' or 'list_cont'.
162 * Timeout for the operation.
164 struct GNUNET_TIME_Absolute timeout;
167 * Task to run when request times out.
169 GNUNET_SCHEDULER_TaskIdentifier timeout_task_id;
172 * Flags for passing std descriptors to ARM (when starting ARM).
174 enum GNUNET_OS_InheritStdioFlags std_inheritance;
177 * Type of the request expressed as a message type (start, stop or list).
186 * @param h arm handle
187 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
190 reconnect_arm (struct GNUNET_ARM_Handle *h);
194 * Check the list of pending requests, send the next
197 * @param h arm handle
198 * @param ignore_currently_down transmit message even if not initialized?
201 trigger_next_request (struct GNUNET_ARM_Handle *h, int ignore_currently_down);
205 * Task scheduled to try to re-connect to arm.
207 * @param cls the 'struct GNUNET_ARM_Handle'
208 * @param tc task context
211 reconnect_arm_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
213 struct GNUNET_ARM_Handle *h = cls;
215 h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
216 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connecting to ARM service after delay\n");
222 * Close down any existing connection to the ARM service and
223 * try re-establishing it later.
225 * @param h our handle
228 reconnect_arm_later (struct GNUNET_ARM_Handle *h)
230 if (GNUNET_NO != h->currently_down)
234 GNUNET_CLIENT_notify_transmit_ready_cancel (h->cth);
237 if (NULL != h->client)
239 GNUNET_CLIENT_disconnect (h->client);
242 h->currently_down = GNUNET_YES;
243 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == h->reconnect_task);
245 GNUNET_SCHEDULER_add_delayed (h->retry_backoff, &reconnect_arm_task, h);
246 /* Don't clear pending messages on disconnection, deliver them later
247 clear_pending_messages (h, GNUNET_ARM_REQUEST_DISCONNECTED);
248 GNUNET_assert (NULL == h->control_pending_head);
250 h->retry_backoff = GNUNET_TIME_STD_BACKOFF (h->retry_backoff);
251 if (NULL != h->conn_status)
252 h->conn_status (h->conn_status_cls, GNUNET_NO);
257 * Find a control message by its unique ID.
259 * @param h ARM handle
260 * @param id unique message ID to use for the lookup
261 * @return NULL if not found
263 static struct ARMControlMessage *
264 find_cm_by_id (struct GNUNET_ARM_Handle *h, uint64_t id)
266 struct ARMControlMessage *result;
267 for (result = h->control_sent_head; result; result = result->next)
268 if (id == result->msg->request_id)
275 * Handler for ARM 'termination' reply (failure to receive).
277 * @param cls our "struct GNUNET_ARM_Handle"
278 * @param msg expected to be NULL
281 arm_termination_handler (void *cls, const struct GNUNET_MessageHeader *msg)
283 struct GNUNET_ARM_Handle *h = cls;
284 struct ARMControlMessage *cm;
289 GNUNET_CLIENT_receive (h->client, &arm_termination_handler, h,
290 GNUNET_TIME_UNIT_FOREVER_REL);
295 h->currently_down = GNUNET_YES;
296 GNUNET_CLIENT_disconnect (h->client);
298 if (NULL != cm->result_cont)
299 cm->result_cont (cm->cont_cls,
300 GNUNET_ARM_REQUEST_SENT_OK,
301 (const char *) &cm->msg[1],
302 GNUNET_ARM_RESULT_STOPPED);
303 GNUNET_free (cm->msg);
309 * Handler for ARM replies.
311 * @param cls our `struct GNUNET_ARM_Handle`
312 * @param msg the message received from the arm service
315 client_notify_handler (void *cls,
316 const struct GNUNET_MessageHeader *msg)
318 struct GNUNET_ARM_Handle *h = cls;
319 const struct GNUNET_ARM_Message *arm_msg;
320 const struct GNUNET_ARM_ResultMessage *res;
321 const struct GNUNET_ARM_ListResultMessage *lres;
322 struct ARMControlMessage *cm;
326 enum GNUNET_ARM_Result result;
336 LOG (GNUNET_ERROR_TYPE_INFO,
337 _("Client was disconnected from arm service, trying to reconnect.\n"));
338 reconnect_arm_later (h);
341 msize = ntohs (msg->size);
342 LOG (GNUNET_ERROR_TYPE_DEBUG,
343 "Processing message of type %u and size %u from arm service\n",
344 ntohs (msg->type), msize);
345 if (msize < sizeof (struct GNUNET_ARM_Message))
348 reconnect_arm_later (h);
351 arm_msg = (const struct GNUNET_ARM_Message *) msg;
352 GNUNET_break (0 == ntohl (arm_msg->reserved));
353 id = GNUNET_ntohll (arm_msg->request_id);
354 cm = find_cm_by_id (h, id);
357 LOG (GNUNET_ERROR_TYPE_DEBUG,
358 "Message with unknown id %llu\n",
363 switch (ntohs (msg->type))
365 case GNUNET_MESSAGE_TYPE_ARM_RESULT:
366 if (msize < sizeof (struct GNUNET_ARM_ResultMessage))
372 case GNUNET_MESSAGE_TYPE_ARM_LIST_RESULT:
373 if (msize < sizeof (struct GNUNET_ARM_ListResultMessage))
380 lres = (const struct GNUNET_ARM_ListResultMessage *) msg;
381 rcount = ntohs (lres->count);
385 list = GNUNET_malloc (sizeof (const char *) * rcount);
386 pos = (const char *)&lres[1];
387 for (i = 0; i < rcount; i++)
389 const char *end = memchr (pos, 0, msize - size_check);
397 size_check += (end - pos) + 1;
400 if (GNUNET_YES == fail)
411 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != cm->timeout_task_id);
412 GNUNET_SCHEDULER_cancel (cm->timeout_task_id);
413 GNUNET_CONTAINER_DLL_remove (h->control_sent_head,
414 h->control_sent_tail, cm);
415 if (GNUNET_YES == fail)
417 reconnect_arm_later (h);
418 GNUNET_free (cm->msg);
422 if ( (GNUNET_MESSAGE_TYPE_ARM_RESULT == ntohs (msg->type)) &&
423 (0 == strcasecmp ((const char *) &cm->msg[1],
425 (NULL != (res = (const struct GNUNET_ARM_ResultMessage *) msg)) &&
426 (GNUNET_ARM_RESULT_STOPPING == ntohl (res->result)) )
428 /* special case: if we are stopping 'gnunet-service-arm', we do not just
429 wait for the result message, but also wait for the service to close
430 the connection (and then we have to close our client handle as well);
431 this is done by installing a different receive handler, waiting for
432 the connection to go down */
436 cm->result_cont (h->thm->cont_cls,
437 GNUNET_ARM_REQUEST_SENT_OK,
438 (const char *) &h->thm->msg[1],
439 GNUNET_ARM_RESULT_IS_NOT_KNOWN);
440 GNUNET_free (h->thm->msg);
441 GNUNET_free (h->thm);
444 GNUNET_CLIENT_receive (h->client, &arm_termination_handler, h,
445 GNUNET_TIME_UNIT_FOREVER_REL);
448 GNUNET_CLIENT_receive (h->client, &client_notify_handler, h,
449 GNUNET_TIME_UNIT_FOREVER_REL);
450 switch (ntohs (msg->type))
452 case GNUNET_MESSAGE_TYPE_ARM_RESULT:
453 res = (const struct GNUNET_ARM_ResultMessage *) msg;
454 LOG (GNUNET_ERROR_TYPE_DEBUG,
455 "Received response from ARM for service `%s': %u\n",
456 (const char *) &cm->msg[1], ntohs (msg->type));
457 result = (enum GNUNET_ARM_Result) ntohl (res->result);
458 if (NULL != cm->result_cont)
459 cm->result_cont (cm->cont_cls, GNUNET_ARM_REQUEST_SENT_OK,
460 (const char *) &cm->msg[1], result);
462 case GNUNET_MESSAGE_TYPE_ARM_LIST_RESULT:
463 if (NULL != cm->list_cont)
464 cm->list_cont (cm->cont_cls, GNUNET_ARM_REQUEST_SENT_OK, rcount,
466 GNUNET_free_non_null (list);
469 GNUNET_free (cm->msg);
475 * Transmit the next message to the arm service.
477 * @param cls closure with the 'struct GNUNET_ARM_Handle'
478 * @param size number of bytes available in buf
479 * @param buf where the callee should write the message
480 * @return number of bytes written to buf
483 transmit_arm_message (void *cls, size_t size, void *buf)
485 struct GNUNET_ARM_Handle *h = cls;
486 struct ARMControlMessage *cm;
487 struct GNUNET_ARM_Message *arm_msg;
489 int notify_connection;
492 notify_connection = GNUNET_NO;
493 LOG (GNUNET_ERROR_TYPE_DEBUG,
494 "transmit_arm_message is running with %p buffer of size %lu. ARM is known to be %s\n",
495 buf, size, h->currently_down ? "unconnected" : "connected");
496 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == h->reconnect_task);
498 if ((GNUNET_YES == h->currently_down) && (NULL != buf))
500 h->currently_down = GNUNET_NO;
501 notify_connection = GNUNET_YES;
502 h->retry_backoff = GNUNET_TIME_UNIT_MILLISECONDS;
503 GNUNET_CLIENT_receive (h->client, &client_notify_handler, h,
504 GNUNET_TIME_UNIT_FOREVER_REL);
508 LOG (GNUNET_ERROR_TYPE_DEBUG,
509 "Transmission failed, initiating reconnect\n");
510 reconnect_arm_later (h);
513 if (NULL == (cm = h->control_pending_head))
515 LOG (GNUNET_ERROR_TYPE_DEBUG, "Queue is empty, not sending anything\n");
519 GNUNET_assert (NULL != cm->msg);
520 msize = ntohs (cm->msg->header.size);
523 LOG (GNUNET_ERROR_TYPE_DEBUG,
524 "Request is too big (%u < %u), not sending it\n", size, msize);
525 trigger_next_request (h, GNUNET_NO);
530 if (0 == h->request_id_counter)
531 h->request_id_counter++;
532 request_id = h->request_id_counter++;
533 LOG (GNUNET_ERROR_TYPE_DEBUG,
534 "Transmitting control message with %u bytes of type %u to arm with id %llu\n",
535 (unsigned int) msize, (unsigned int) ntohs (cm->msg->header.type), request_id);
536 arm_msg->reserved = htonl (0);
537 arm_msg->request_id = GNUNET_htonll (request_id);
538 memcpy (buf, cm->msg, msize);
539 /* Otherwise we won't be able to find it later! */
540 arm_msg->request_id = request_id;
541 GNUNET_CONTAINER_DLL_remove (h->control_pending_head,
542 h->control_pending_tail, cm);
543 GNUNET_CONTAINER_DLL_insert_tail (h->control_sent_head,
544 h->control_sent_tail, cm);
545 /* Don't free msg, keep it around (kind of wasteful, but then we don't
546 * really have many messages to handle, and it'll be freed when it times
549 trigger_next_request (h, GNUNET_NO);
552 if ((GNUNET_YES == notify_connection) && (NULL != h->conn_status))
553 h->conn_status (h->conn_status_cls, GNUNET_YES);
559 * Check the list of pending requests, send the next
562 * @param h arm handle
563 * @param ignore_currently_down transmit message even if not initialized?
566 trigger_next_request (struct GNUNET_ARM_Handle *h, int ignore_currently_down)
570 msize = sizeof (struct GNUNET_MessageHeader);
571 if ((GNUNET_YES == h->currently_down) && (ignore_currently_down == GNUNET_NO))
573 LOG (GNUNET_ERROR_TYPE_DEBUG,
574 "ARM connection down, not processing queue\n");
579 LOG (GNUNET_ERROR_TYPE_DEBUG, "Request pending, not processing queue\n");
582 if (NULL != h->control_pending_head)
584 ntohs (h->control_pending_head->msg->header.size);
585 else if (GNUNET_NO == ignore_currently_down)
587 LOG (GNUNET_ERROR_TYPE_DEBUG,
588 "Request queue empty, not processing queue\n");
589 return; /* no pending message */
592 GNUNET_CLIENT_notify_transmit_ready (h->client, msize,
593 GNUNET_TIME_UNIT_FOREVER_REL,
594 GNUNET_NO, &transmit_arm_message, h);
601 * @param h arm handle
602 * @return GNUNET_OK on success, GNUNET_SYSERR on failure
605 reconnect_arm (struct GNUNET_ARM_Handle *h)
607 GNUNET_assert (NULL == h->client);
608 GNUNET_assert (GNUNET_YES == h->currently_down);
609 h->client = GNUNET_CLIENT_connect ("arm", h->cfg);
610 if (NULL == h->client)
612 LOG (GNUNET_ERROR_TYPE_DEBUG,
613 "arm_api, GNUNET_CLIENT_connect returned NULL\n");
614 if (NULL != h->conn_status)
615 h->conn_status (h->conn_status_cls, GNUNET_SYSERR);
616 return GNUNET_SYSERR;
618 LOG (GNUNET_ERROR_TYPE_DEBUG,
619 "arm_api, GNUNET_CLIENT_connect returned non-NULL\n");
620 trigger_next_request (h, GNUNET_YES);
626 * Set up a context for communicating with ARM, then
627 * start connecting to the ARM service using that context.
629 * @param cfg configuration to use (needed to contact ARM;
630 * the ARM service may internally use a different
631 * configuration to determine how to start the service).
632 * @param conn_status will be called when connecting/disconnecting
633 * @param cls closure for conn_status
634 * @return context to use for further ARM operations, NULL on error.
636 struct GNUNET_ARM_Handle *
637 GNUNET_ARM_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
638 GNUNET_ARM_ConnectionStatusCallback conn_status, void *cls)
640 struct GNUNET_ARM_Handle *h;
642 h = GNUNET_new (struct GNUNET_ARM_Handle);
643 h->cfg = GNUNET_CONFIGURATION_dup (cfg);
644 h->currently_down = GNUNET_YES;
645 h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
646 h->conn_status = conn_status;
647 h->conn_status_cls = cls;
648 if (GNUNET_OK != reconnect_arm (h))
658 * Disconnect from the ARM service (if connected) and destroy the context.
660 * @param h the handle that was being used
663 GNUNET_ARM_disconnect_and_free (struct GNUNET_ARM_Handle *h)
665 struct ARMControlMessage *cm;
667 LOG (GNUNET_ERROR_TYPE_DEBUG, "Disconnecting from ARM service\n");
670 GNUNET_CLIENT_notify_transmit_ready_cancel (h->cth);
673 while ((NULL != (cm = h->control_pending_head))
674 || (NULL != (cm = h->control_sent_head)) )
676 if (NULL != h->control_pending_head)
677 GNUNET_CONTAINER_DLL_remove (h->control_pending_head,
678 h->control_pending_tail, cm);
680 GNUNET_CONTAINER_DLL_remove (h->control_sent_head,
681 h->control_sent_tail, cm);
682 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != cm->timeout_task_id);
683 GNUNET_SCHEDULER_cancel (cm->timeout_task_id);
684 if (NULL != cm->result_cont)
685 cm->result_cont (cm->cont_cls, GNUNET_ARM_REQUEST_DISCONNECTED,
687 /* FIXME: What about list callback? */
688 GNUNET_free_non_null (cm->msg);
691 if (NULL != h->client)
693 GNUNET_CLIENT_disconnect (h->client);
696 if (GNUNET_SCHEDULER_NO_TASK != h->reconnect_task)
698 GNUNET_SCHEDULER_cancel (h->reconnect_task);
699 h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
701 if (GNUNET_NO == h->service_test_is_active)
703 GNUNET_CONFIGURATION_destroy (h->cfg);
710 * Message timed out. Remove it from the queue.
712 * @param cls the message (struct ARMControlMessage *)
713 * @param tc task context
716 control_message_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
718 struct ARMControlMessage *cm = cls;
719 struct GNUNET_ARM_Message *arm_msg;
721 LOG (GNUNET_ERROR_TYPE_DEBUG,
722 "Control message timed out\n");
724 if ((NULL == arm_msg) || (0 == arm_msg->request_id))
726 GNUNET_CONTAINER_DLL_remove (cm->h->control_pending_head,
727 cm->h->control_pending_tail, cm);
731 GNUNET_CONTAINER_DLL_remove (cm->h->control_sent_head,
732 cm->h->control_sent_tail, cm);
734 if (NULL != cm->result_cont)
735 cm->result_cont (cm->cont_cls, GNUNET_ARM_REQUEST_TIMEOUT, NULL, 0);
736 else if (NULL != cm->list_cont)
737 cm->list_cont (cm->cont_cls, GNUNET_ARM_REQUEST_TIMEOUT, 0, NULL);
738 GNUNET_free_non_null (cm->msg);
744 * A client specifically requested starting of ARM itself.
745 * This function is called with information about whether
746 * or not ARM is running; if it is, report success. If
747 * it is not, start the ARM process.
749 * @param cls the context for the request that we will report on (struct ARMControlMessage *)
750 * @param result GNUNET_YES if ARM is running
753 arm_service_report (void *cls,
756 struct ARMControlMessage *cm = cls;
757 struct GNUNET_ARM_Handle *h;
758 struct GNUNET_OS_Process *proc;
759 unsigned char test_is_active;
767 test_is_active = cm->h->service_test_is_active;
768 if ((GNUNET_YES == test_is_active) &&
769 (GNUNET_YES == result))
771 LOG (GNUNET_ERROR_TYPE_DEBUG,
772 "Looks like `%s' is already running.\n",
773 "gnunet-service-arm");
774 /* arm is running! */
776 cm->result_cont (cm->cont_cls,
777 GNUNET_ARM_REQUEST_SENT_OK, "arm",
778 GNUNET_ARM_RESULT_IS_STARTED_ALREADY);
780 if (GNUNET_NO == test_is_active)
782 /* User disconnected & destroyed ARM handle in the middle of
783 * the service test, so we kept the handle around until now.
785 GNUNET_CONFIGURATION_destroy (cm->h->cfg);
788 if ((GNUNET_YES == result) ||
789 (GNUNET_NO == test_is_active))
794 cm->h->service_test_is_active = GNUNET_NO;
795 LOG (GNUNET_ERROR_TYPE_DEBUG,
796 "Looks like `%s' is not running, will start it.\n",
797 "gnunet-service-arm");
798 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (
799 cm->h->cfg, "arm", "PREFIX", &loprefix))
800 loprefix = GNUNET_strdup ("");
801 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (
802 cm->h->cfg, "arm", "OPTIONS", &lopostfix))
803 lopostfix = GNUNET_strdup ("");
804 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (
805 cm->h->cfg, "arm", "BINARY", &cbinary))
807 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_WARNING, "arm", "BINARY");
809 cm->result_cont (cm->cont_cls,
810 GNUNET_ARM_REQUEST_SENT_OK, "arm",
811 GNUNET_ARM_RESULT_IS_NOT_KNOWN);
813 GNUNET_free (loprefix);
814 GNUNET_free (lopostfix);
817 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (
818 cm->h->cfg, "arm", "CONFIG", &config))
820 binary = GNUNET_OS_get_libexec_binary_path (cbinary);
821 GNUNET_asprintf ("edbinary,
824 GNUNET_free (cbinary);
825 if ((GNUNET_YES == GNUNET_CONFIGURATION_have_value (
826 cm->h->cfg, "TESTING", "WEAKRANDOM")) &&
827 (GNUNET_YES == GNUNET_CONFIGURATION_get_value_yesno (
828 cm->h->cfg, "TESTING", "WEAKRANDOM")) &&
829 (GNUNET_NO == GNUNET_CONFIGURATION_have_value (
830 cm->h->cfg, "TESTING", "HOSTFILE")))
832 /* Means we are ONLY running locally */
833 /* we're clearly running a test, don't daemonize */
835 proc = GNUNET_OS_start_process_s (GNUNET_NO, cm->std_inheritance,
836 NULL, loprefix, quotedbinary,
837 /* no daemonization! */
840 proc = GNUNET_OS_start_process_s (GNUNET_NO, cm->std_inheritance,
841 NULL, loprefix, quotedbinary, "-c", config,
842 /* no daemonization! */
848 proc = GNUNET_OS_start_process_s (GNUNET_NO, cm->std_inheritance,
849 NULL, loprefix, quotedbinary,
850 "-d", lopostfix, NULL);
852 proc = GNUNET_OS_start_process_s (GNUNET_NO, cm->std_inheritance,
853 NULL, loprefix, quotedbinary, "-c",
855 "-d", lopostfix, NULL);
857 GNUNET_free (binary);
858 GNUNET_free (quotedbinary);
859 GNUNET_free_non_null (config);
860 GNUNET_free (loprefix);
861 GNUNET_free (lopostfix);
865 cm->result_cont (cm->cont_cls, GNUNET_ARM_REQUEST_SENT_OK, "arm",
866 GNUNET_ARM_RESULT_START_FAILED);
871 cm->result_cont (cm->cont_cls, GNUNET_ARM_REQUEST_SENT_OK, "arm",
872 GNUNET_ARM_RESULT_STARTING);
873 GNUNET_OS_process_destroy (proc);
881 * Start or stop a service.
883 * @param h handle to ARM
884 * @param service_name name of the service
885 * @param timeout how long to wait before failing for good
886 * @param cb callback to invoke when service is ready
887 * @param cb_cls closure for callback
888 * @param type type of the request
891 change_service (struct GNUNET_ARM_Handle *h, const char *service_name,
892 struct GNUNET_TIME_Relative timeout, GNUNET_ARM_ResultCallback cb,
893 void *cb_cls, uint16_t type)
895 struct ARMControlMessage *cm;
897 struct GNUNET_ARM_Message *msg;
899 slen = strlen (service_name) + 1;
900 if (slen + sizeof (struct GNUNET_ARM_Message) >=
901 GNUNET_SERVER_MAX_MESSAGE_SIZE)
905 cb (cb_cls, GNUNET_ARM_REQUEST_TOO_LONG, NULL, 0);
908 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting %s of service `%s'.\n",
909 (GNUNET_MESSAGE_TYPE_ARM_START == type) ? "start" : "termination",
911 cm = GNUNET_malloc (sizeof (struct ARMControlMessage) + slen);
913 cm->result_cont = cb;
914 cm->cont_cls = cb_cls;
915 cm->timeout = GNUNET_TIME_relative_to_absolute (timeout);
916 memcpy (&cm[1], service_name, slen);
917 msg = GNUNET_malloc (sizeof (struct GNUNET_ARM_Message) + slen);
918 msg->header.size = htons (sizeof (struct GNUNET_ARM_Message) + slen);
919 msg->header.type = htons (type);
920 msg->reserved = htonl (0);
921 memcpy (&msg[1], service_name, slen);
923 LOG (GNUNET_ERROR_TYPE_DEBUG,
924 "Inserting a control message into the queue. Timeout is %s\n",
925 GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_remaining (cm->timeout),
927 GNUNET_CONTAINER_DLL_insert_tail (h->control_pending_head,
928 h->control_pending_tail, cm);
929 cm->timeout_task_id =
930 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining
931 (cm->timeout), &control_message_timeout, cm);
932 trigger_next_request (h, GNUNET_NO);
937 * Request for a service to be started.
939 * @param h handle to ARM
940 * @param service_name name of the service
941 * @param std_inheritance inheritance of std streams
942 * @param timeout how long to wait before failing for good
943 * @param cont callback to invoke after request is sent or not sent
944 * @param cont_cls closure for callback
947 GNUNET_ARM_request_service_start (struct GNUNET_ARM_Handle *h,
948 const char *service_name,
949 enum GNUNET_OS_InheritStdioFlags std_inheritance,
950 struct GNUNET_TIME_Relative timeout,
951 GNUNET_ARM_ResultCallback cont,
954 struct ARMControlMessage *cm;
957 LOG (GNUNET_ERROR_TYPE_DEBUG,
958 "Asked to start service `%s' within %s\n", service_name,
959 GNUNET_STRINGS_relative_time_to_string (timeout, GNUNET_NO));
960 if (0 == strcasecmp ("arm", service_name))
963 * 1) We're connected to ARM already. Invoke the callback immediately.
964 * 2) We're not connected to ARM.
965 * Cancel any reconnection attempts temporarily, then perform
968 if (GNUNET_NO == h->currently_down)
970 LOG (GNUNET_ERROR_TYPE_DEBUG, "ARM is already running\n");
972 cont (cont_cls, GNUNET_ARM_REQUEST_SENT_OK, "arm", GNUNET_ARM_RESULT_IS_STARTED_ALREADY);
974 else if (GNUNET_NO == h->service_test_is_active)
978 GNUNET_CLIENT_notify_transmit_ready_cancel (h->cth);
981 if (NULL != h->client)
983 GNUNET_CLIENT_disconnect (h->client);
986 if (GNUNET_SCHEDULER_NO_TASK != h->reconnect_task)
988 GNUNET_SCHEDULER_cancel (h->reconnect_task);
989 h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
992 LOG (GNUNET_ERROR_TYPE_DEBUG,
993 "Not connected to ARM, will do a service test\n");
995 slen = strlen ("arm") + 1;
996 cm = GNUNET_malloc (sizeof (struct ARMControlMessage) + slen);
998 cm->result_cont = cont;
999 cm->cont_cls = cont_cls;
1000 cm->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1001 cm->std_inheritance = std_inheritance;
1002 memcpy (&cm[1], service_name, slen);
1003 h->service_test_is_active = GNUNET_YES;
1004 GNUNET_CLIENT_service_test ("arm", h->cfg, timeout, &arm_service_report,
1009 /* Service test is already running - tell user to chill out and try
1012 LOG (GNUNET_ERROR_TYPE_DEBUG, "Service test is already in progress, we're busy\n");
1014 cont (cont_cls, GNUNET_ARM_REQUEST_BUSY, NULL, 0);
1018 change_service (h, service_name, timeout, cont, cont_cls,
1019 GNUNET_MESSAGE_TYPE_ARM_START);
1024 * Request a service to be stopped.
1025 * Stopping arm itself will not invalidate its handle, and
1026 * ARM API will try to restore connection to the ARM service,
1027 * even if ARM connection was lost because you asked for ARM to be stopped.
1028 * Call GNUNET_ARM_disconnect_and_free () to free the handle and prevent
1029 * further connection attempts.
1031 * @param h handle to ARM
1032 * @param service_name name of the service
1033 * @param timeout how long to wait before failing for good
1034 * @param cont callback to invoke after request is sent or is not sent
1035 * @param cont_cls closure for callback
1038 GNUNET_ARM_request_service_stop (struct GNUNET_ARM_Handle *h,
1039 const char *service_name,
1040 struct GNUNET_TIME_Relative timeout,
1041 GNUNET_ARM_ResultCallback cont,
1044 LOG (GNUNET_ERROR_TYPE_DEBUG,
1045 "Stopping service `%s' within %s\n",
1047 GNUNET_STRINGS_relative_time_to_string (timeout, GNUNET_NO));
1048 change_service (h, service_name, timeout, cont, cont_cls,
1049 GNUNET_MESSAGE_TYPE_ARM_STOP);
1054 * Request a list of running services.
1056 * @param h handle to ARM
1057 * @param timeout how long to wait before failing for good
1058 * @param cont callback to invoke after request is sent or is not sent
1059 * @param cont_cls closure for callback
1062 GNUNET_ARM_request_service_list (struct GNUNET_ARM_Handle *h,
1063 struct GNUNET_TIME_Relative timeout,
1064 GNUNET_ARM_ServiceListCallback cont,
1067 struct ARMControlMessage *cm;
1068 struct GNUNET_ARM_Message *msg;
1070 LOG (GNUNET_ERROR_TYPE_DEBUG,
1071 "Requesting LIST from ARM service with timeout: %s\n",
1072 GNUNET_STRINGS_relative_time_to_string (timeout, GNUNET_YES));
1073 cm = GNUNET_new (struct ARMControlMessage);
1075 cm->list_cont = cont;
1076 cm->cont_cls = cont_cls;
1077 cm->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1078 msg = GNUNET_malloc (sizeof (struct GNUNET_ARM_Message));
1079 msg->header.size = htons (sizeof (struct GNUNET_ARM_Message));
1080 msg->header.type = htons (GNUNET_MESSAGE_TYPE_ARM_LIST);
1081 msg->reserved = htonl (0);
1083 GNUNET_CONTAINER_DLL_insert_tail (h->control_pending_head,
1084 h->control_pending_tail, cm);
1085 cm->timeout_task_id =
1086 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining
1087 (cm->timeout), &control_message_timeout, cm);
1088 trigger_next_request (h, GNUNET_NO);
1092 /* end of arm_api.c */