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3 (C) 2008--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 2, or (at your
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13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 * @file testbed/gnunet-service-testbed_links.c
23 * @brief TESTBED service components that deals with starting slave controllers
24 * and establishing lateral links between controllers
25 * @author Sree Harsha Totakura
28 #include "gnunet-service-testbed.h"
31 * Redefine LOG with a changed log component string
36 #define LOG(kind,...) \
37 GNUNET_log_from (kind, "testbed-links", __VA_ARGS__)
40 * The event mask for the events we listen from sub-controllers
42 #define EVENT_MASK (1LL << GNUNET_TESTBED_ET_OPERATION_FINISHED)
46 * States of LCFContext
51 * The Context has been initialized; Nothing has been done on it
56 * Delegated host has been registered at the forwarding controller
58 DELEGATED_HOST_REGISTERED,
61 * The slave host has been registred at the forwarding controller
63 SLAVE_HOST_REGISTERED,
66 * The context has been finished (may have error)
73 * Link controllers request forwarding context
78 * The type of this data structure. Set this to CLOSURE_TYPE_LCF
80 enum ClosureType type;
83 * The gateway which will pass the link message to delegated host
85 struct Slave *gateway;
88 * The client which has asked to perform this operation
90 struct GNUNET_SERVER_Client *client;
93 * Handle for operations which are forwarded while linking controllers
95 struct GNUNET_TESTBED_Operation *op;
100 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
103 * The id of the operation which created this context
105 uint64_t operation_id;
108 * should the slave controller start the delegated controller?
113 * The state of this context
115 enum LCFContextState state;
120 uint32_t delegated_host_id;
125 uint32_t slave_host_id;
131 * Structure of a queue entry in LCFContext request queue
133 struct LCFContextQueue
138 struct LCFContext *lcf;
143 struct LCFContextQueue *next;
148 struct LCFContextQueue *prev;
151 struct NeighbourConnectNotification
153 struct NeighbourConnectNotification *next;
154 struct NeighbourConnectNotification *prev;
156 GST_NeigbourConnectNotifyCallback cb;
161 * A connected controller which is not our child
166 * The controller handle
168 struct GNUNET_TESTBED_Controller *controller;
171 * Operation handle for opening a lateral connection to another controller.
172 * Will be NULL if the slave controller is started by this controller
174 struct GNUNET_TESTBED_Operation *conn_op;
176 struct NeighbourConnectNotification *nl_head;
178 struct NeighbourConnectNotification *nl_tail;
180 GNUNET_SCHEDULER_TaskIdentifier notify_task;
182 unsigned int reference_cnt;
184 unsigned int inactive;
188 * The id of the host this controller is running on
194 static struct Neighbour **neighbour_list;
195 static unsigned int neighbour_list_size;
197 struct NeighbourConnectCtxt
199 struct NeighbourConnectCtxt *next;
200 struct NeighbourConnectCtxt *prev;
202 struct GNUNET_SERVER_Client *client;
203 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
204 struct NeighbourConnectNotification *nh;
208 struct NeighbourConnectCtxt *ncc_head;
209 struct NeighbourConnectCtxt *ncc_tail;
212 * A list of directly linked neighbours
214 struct Slave **GST_slave_list;
217 * The size of directly linked neighbours list
219 unsigned int GST_slave_list_size;
224 static struct Route **route_list;
227 * The head for the LCF queue
229 static struct LCFContextQueue *lcfq_head;
232 * The tail for the LCF queue
234 static struct LCFContextQueue *lcfq_tail;
237 * The lcf_task handle
239 static GNUNET_SCHEDULER_TaskIdentifier lcf_proc_task_id;
242 * The size of the route list
244 static unsigned int route_list_size;
248 * Adds a slave to the slave array
250 * @param slave the slave controller to add
253 slave_list_add (struct Slave *slave)
255 if (slave->host_id >= GST_slave_list_size)
256 GST_array_grow_large_enough (GST_slave_list, GST_slave_list_size,
258 GNUNET_assert (NULL == GST_slave_list[slave->host_id]);
259 GST_slave_list[slave->host_id] = slave;
264 * Adds a route to the route list
266 * @param route the route to add
269 route_list_add (struct Route *route)
271 if (route->dest >= route_list_size)
272 GST_array_grow_large_enough (route_list, route_list_size, route->dest);
273 GNUNET_assert (NULL == route_list[route->dest]);
274 route_list[route->dest] = route;
278 neighbour_list_add (struct Neighbour *n)
280 if (n->host_id >= neighbour_list_size)
281 GST_array_grow_large_enough (neighbour_list, neighbour_list_size, n->host_id);
282 GNUNET_assert (NULL == neighbour_list[n->host_id]);
283 neighbour_list[n->host_id] = n;
288 * Cleans up the route list
291 GST_route_list_clear ()
295 for (id = 0; id < route_list_size; id++)
296 if (NULL != route_list[id])
297 GNUNET_free (route_list[id]);
298 GNUNET_free_non_null (route_list);
304 * Iterator for freeing hash map entries in a slave's reghost_map
306 * @param cls handle to the slave
307 * @param key current key code
308 * @param value value in the hash map
309 * @return GNUNET_YES if we should continue to
314 reghost_free_iterator (void *cls, const struct GNUNET_HashCode *key,
317 struct Slave *slave = cls;
318 struct RegisteredHostContext *rhc = value;
319 struct ForwardedOverlayConnectContext *focc;
321 GNUNET_assert (GNUNET_YES ==
322 GNUNET_CONTAINER_multihashmap_remove (slave->reghost_map, key,
324 while (NULL != (focc = rhc->focc_dll_head))
326 GNUNET_CONTAINER_DLL_remove (rhc->focc_dll_head, rhc->focc_dll_tail, focc);
327 GST_cleanup_focc (focc);
329 if (NULL != rhc->sub_op)
330 GNUNET_TESTBED_operation_done (rhc->sub_op);
331 if (NULL != rhc->client)
332 GNUNET_SERVER_client_drop (rhc->client);
339 * Cleans up the slave list
342 GST_slave_list_clear ()
345 struct HostRegistration *hr_entry;
347 for (id = 0; id < GST_slave_list_size; id++)
348 if (NULL != GST_slave_list[id])
350 while (NULL != (hr_entry = GST_slave_list[id]->hr_dll_head))
352 GNUNET_CONTAINER_DLL_remove (GST_slave_list[id]->hr_dll_head,
353 GST_slave_list[id]->hr_dll_tail, hr_entry);
354 GNUNET_free (hr_entry);
356 if (NULL != GST_slave_list[id]->rhandle)
357 GNUNET_TESTBED_cancel_registration (GST_slave_list[id]->rhandle);
359 GNUNET_CONTAINER_multihashmap_iterate (GST_slave_list
361 reghost_free_iterator,
363 GNUNET_CONTAINER_multihashmap_destroy (GST_slave_list[id]->reghost_map);
364 if (NULL != GST_slave_list[id]->controller)
365 GNUNET_TESTBED_controller_disconnect (GST_slave_list[id]->controller);
366 if (NULL != GST_slave_list[id]->controller_proc)
367 GNUNET_TESTBED_controller_stop (GST_slave_list[id]->controller_proc);
368 GNUNET_free (GST_slave_list[id]);
370 GNUNET_free_non_null (GST_slave_list);
371 GST_slave_list = NULL;
376 * Finds the route with directly connected host as destination through which
377 * the destination host can be reached
379 * @param host_id the id of the destination host
380 * @return the route with directly connected destination host; NULL if no route
384 GST_find_dest_route (uint32_t host_id)
388 if (route_list_size <= host_id)
390 while (NULL != (route = route_list[host_id]))
392 if (route->thru == GST_context->host_id)
394 host_id = route->thru;
401 * Function to send a failure reponse for controller link operation
403 * @param client the client to send the message to
404 * @param operation_id the operation ID of the controller link request
405 * @param cfg the configuration with which the delegated controller is started.
406 * Can be NULL if the delegated controller is not started but just
408 * @param emsg set to an error message explaining why the controller link
409 * failed. Setting this to NULL signifies success. !This should be
410 * NULL if cfg is set!
413 send_controller_link_response (struct GNUNET_SERVER_Client *client,
414 uint64_t operation_id,
415 const struct GNUNET_CONFIGURATION_Handle
419 struct GNUNET_TESTBED_ControllerLinkResponse *msg;
425 GNUNET_assert ((NULL == cfg) || (NULL == emsg));
429 msize = sizeof (struct GNUNET_TESTBED_ControllerLinkResponse);
432 xconfig = GNUNET_TESTBED_compress_cfg_ (cfg,
435 msize += xconfig_size;
438 msize += strlen (emsg);
439 msg = GNUNET_malloc (msize);
440 msg->header.type = htons
441 (GNUNET_MESSAGE_TYPE_TESTBED_LINK_CONTROLLERS_RESULT);
442 msg->header.size = htons (msize);
444 msg->success = htons (GNUNET_YES);
445 msg->operation_id = GNUNET_htonll (operation_id);
446 msg->config_size = htons ((uint16_t) config_size);
449 memcpy (&msg[1], xconfig, xconfig_size);
450 GNUNET_free (xconfig);
453 memcpy (&msg[1], emsg, strlen (emsg));
454 GST_queue_message (client, &msg->header);
459 * The Link Controller forwarding task
461 * @param cls the LCFContext
462 * @param tc the Task context from scheduler
465 lcf_proc_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
469 * Completion callback for host registrations while forwarding Link Controller messages
471 * @param cls the LCFContext
472 * @param emsg the error message; NULL if host registration is successful
475 lcf_proc_cc (void *cls, const char *emsg)
477 struct LCFContext *lcf = cls;
479 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == lcf_proc_task_id);
484 goto registration_error;
485 lcf->state = DELEGATED_HOST_REGISTERED;
486 lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf);
488 case DELEGATED_HOST_REGISTERED:
490 goto registration_error;
491 lcf->state = SLAVE_HOST_REGISTERED;
492 lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf);
495 GNUNET_assert (0); /* Shouldn't reach here */
500 LOG (GNUNET_ERROR_TYPE_WARNING, "Host registration failed with message: %s\n",
502 lcf->state = FINISHED;
503 lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf);
508 * The Link Controller forwarding task
510 * @param cls the LCFContext
511 * @param tc the Task context from scheduler
514 lcf_proc_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
518 * Task to free resources when forwarded link controllers has been timedout
520 * @param cls the LCFContext
521 * @param tc the task context from scheduler
524 lcf_forwarded_operation_timeout (void *cls,
525 const struct GNUNET_SCHEDULER_TaskContext *tc)
527 struct LCFContext *lcf = cls;
529 lcf->timeout_task = GNUNET_SCHEDULER_NO_TASK;
530 // GST_forwarded_operation_timeout (lcf->fopc, tc);
531 LOG (GNUNET_ERROR_TYPE_WARNING,
532 "A forwarded controller link operation has timed out\n");
533 send_controller_link_response (lcf->client, lcf->operation_id, NULL,
534 "A forwarded controller link operation has "
536 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == lcf_proc_task_id);
537 lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf);
542 * The Link Controller forwarding task
544 * @param cls the LCFContext
545 * @param tc the Task context from scheduler
548 lcf_proc_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
550 struct LCFContext *lcf = cls;
551 struct LCFContextQueue *lcfq;
553 lcf_proc_task_id = GNUNET_SCHEDULER_NO_TASK;
558 GNUNET_TESTBED_is_host_registered_ (GST_host_list
559 [lcf->delegated_host_id],
560 lcf->gateway->controller))
562 GST_queue_host_registration (lcf->gateway, lcf_proc_cc, lcf,
563 GST_host_list[lcf->delegated_host_id]);
567 lcf->state = DELEGATED_HOST_REGISTERED;
568 lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf);
571 case DELEGATED_HOST_REGISTERED:
573 GNUNET_TESTBED_is_host_registered_ (GST_host_list[lcf->slave_host_id],
574 lcf->gateway->controller))
576 GST_queue_host_registration (lcf->gateway, lcf_proc_cc, lcf,
577 GST_host_list[lcf->slave_host_id]);
581 lcf->state = SLAVE_HOST_REGISTERED;
582 lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf);
585 case SLAVE_HOST_REGISTERED:
586 lcf->op = GNUNET_TESTBED_controller_link (lcf,
587 lcf->gateway->controller,
588 GST_host_list[lcf->delegated_host_id],
589 GST_host_list[lcf->slave_host_id],
591 lcf->is_subordinate);
593 GNUNET_SCHEDULER_add_delayed (GST_timeout, &lcf_forwarded_operation_timeout,
595 lcf->state = FINISHED;
599 GNUNET_assert (lcfq->lcf == lcf);
600 GNUNET_SERVER_client_drop (lcf->client);
601 GNUNET_TESTBED_operation_done (lcf->op);
603 GNUNET_CONTAINER_DLL_remove (lcfq_head, lcfq_tail, lcfq);
605 if (NULL != lcfq_head)
607 GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcfq_head->lcf);
613 * Callback for event from slave controllers
616 * @param event information about the event
619 slave_event_callback (void *cls,
620 const struct GNUNET_TESTBED_EventInformation *event)
622 struct RegisteredHostContext *rhc;
623 struct LCFContext *lcf;
624 struct GNUNET_CONFIGURATION_Handle *cfg;
625 struct GNUNET_TESTBED_Operation *old_op;
627 /* We currently only get here when working on RegisteredHostContexts and
629 GNUNET_assert (GNUNET_TESTBED_ET_OPERATION_FINISHED == event->type);
631 if (CLOSURE_TYPE_RHC == rhc->type)
633 GNUNET_assert (rhc->sub_op == event->op);
637 cfg = event->details.operation_finished.generic;
638 old_op = rhc->sub_op;
639 rhc->state = RHC_LINK;
641 GNUNET_TESTBED_controller_link (rhc, rhc->gateway->controller,
642 rhc->reg_host, rhc->host, cfg,
644 GNUNET_TESTBED_operation_done (old_op);
647 LOG_DEBUG ("OL: Linking controllers successfull\n");
648 GNUNET_TESTBED_operation_done (rhc->sub_op);
650 rhc->state = RHC_OL_CONNECT;
651 GST_process_next_focc (rhc);
659 if (CLOSURE_TYPE_LCF == lcf->type)
661 GNUNET_assert (lcf->op == event->op);
662 GNUNET_assert (FINISHED == lcf->state);
663 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != lcf->timeout_task);
664 GNUNET_SCHEDULER_cancel (lcf->timeout_task);
665 if (NULL == event->details.operation_finished.emsg)
666 send_controller_link_response (lcf->client, lcf->operation_id,
667 GNUNET_TESTBED_host_get_cfg_
668 (GST_host_list[lcf->delegated_host_id]),
671 send_controller_link_response (lcf->client, lcf->operation_id,
673 event->details.operation_finished.emsg);
674 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == lcf_proc_task_id);
675 lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf);
682 slave_status_callback (void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg,
686 * Callback to signal successfull startup of the controller process
688 * @param cls the handle to the slave whose status is to be found here
689 * @param cfg the configuration with which the controller has been started;
690 * NULL if status is not GNUNET_OK
691 * @param status GNUNET_OK if the startup is successfull; GNUNET_SYSERR if not,
692 * GNUNET_TESTBED_controller_stop() shouldn't be called in this case
695 slave_status_callback (void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg,
698 struct Slave *slave = cls;
699 struct LinkControllersContext *lcc;
702 if (GNUNET_SYSERR == status)
704 slave->controller_proc = NULL;
705 GST_slave_list[slave->host_id] = NULL;
708 LOG (GNUNET_ERROR_TYPE_WARNING, "Unexpected slave shutdown\n");
709 GNUNET_SCHEDULER_shutdown (); /* We too shutdown */
713 GNUNET_TESTBED_controller_connect (GST_host_list[slave->host_id],
714 EVENT_MASK, &slave_event_callback,
716 if (NULL != slave->controller)
718 send_controller_link_response (lcc->client, lcc->operation_id, cfg, NULL);
722 send_controller_link_response (lcc->client, lcc->operation_id, NULL,
723 "Could not connect to delegated controller");
724 GNUNET_TESTBED_controller_stop (slave->controller_proc);
725 GST_slave_list[slave->host_id] = NULL;
733 if (NULL != lcc->client)
735 GNUNET_SERVER_receive_done (lcc->client, GNUNET_OK);
736 GNUNET_SERVER_client_drop (lcc->client);
746 neighbour_connect_notify_task (void *cls,
747 const struct GNUNET_SCHEDULER_TaskContext *tc);
750 trigger_notifications (struct Neighbour *n)
752 GNUNET_assert (NULL != n->conn_op);
753 if (NULL == n->nl_head)
755 if (NULL == n->controller)
757 if (GNUNET_SCHEDULER_NO_TASK != n->notify_task)
759 if (1 == n->inactive)
761 GNUNET_assert (0 == n->reference_cnt);
762 GNUNET_TESTBED_operation_activate_ (n->conn_op);
767 GNUNET_SCHEDULER_add_now (&neighbour_connect_notify_task, n);
771 neighbour_connect_notify_task (void *cls,
772 const struct GNUNET_SCHEDULER_TaskContext *tc)
774 struct Neighbour *n = cls;
775 struct NeighbourConnectNotification *h;
777 GNUNET_assert (NULL != (h = n->nl_head));
778 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != n->notify_task);
779 n->notify_task = GNUNET_SCHEDULER_NO_TASK;
780 GNUNET_assert (NULL != n->controller);
781 GNUNET_CONTAINER_DLL_remove (n->nl_head, n->nl_tail, h);
782 trigger_notifications (n);
783 h->cb (h->cb_cls, n->controller);
788 opstart_neighbour_conn (void *cls)
790 struct Neighbour *n = cls;
792 GNUNET_assert (NULL != n->conn_op);
793 GNUNET_assert (NULL == n->controller);
794 LOG_DEBUG ("Opening connection to controller on host %u\n", n->host_id);
795 n->controller = GNUNET_TESTBED_controller_connect (GST_host_list[n->host_id],
797 &slave_event_callback,
799 trigger_notifications (n);
803 oprelease_neighbour_conn (void *cls)
805 struct Neighbour *n = cls;
807 GNUNET_assert (0 == n->reference_cnt);
808 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == n->notify_task);
809 GNUNET_assert (NULL == n->nl_head);
810 if (NULL != n->controller)
812 LOG_DEBUG ("Closing connection to controller on host %u\n", n->host_id);
813 GNUNET_TESTBED_controller_disconnect (n->controller);
814 n->controller = NULL;
820 struct NeighbourConnectNotification *
821 GST_neighbour_get_connection (struct Neighbour *n,
822 GST_NeigbourConnectNotifyCallback cb,
825 struct NeighbourConnectNotification *h;
827 GNUNET_assert (NULL != cb);
828 LOG_DEBUG ("Attempting to get connection to controller on host %u\n",
830 h = GNUNET_malloc (sizeof (struct NeighbourConnectNotification));
834 GNUNET_CONTAINER_DLL_insert_tail (n->nl_head, n->nl_tail, h);
835 if (NULL == n->conn_op)
837 GNUNET_assert (NULL == n->controller);
838 n->conn_op = GNUNET_TESTBED_operation_create_ (n, &opstart_neighbour_conn,
839 &oprelease_neighbour_conn);
840 GNUNET_TESTBED_operation_queue_insert_ (GST_opq_openfds, n->conn_op);
841 GNUNET_TESTBED_operation_begin_wait_ (n->conn_op);
844 trigger_notifications (n);
849 GST_neighbour_get_connection_cancel (struct NeighbourConnectNotification *h)
855 cleanup_task = (h == n->nl_head) ? GNUNET_YES : GNUNET_NO;
856 GNUNET_CONTAINER_DLL_remove (n->nl_head, n->nl_tail, h);
858 if (GNUNET_NO == cleanup_task)
860 if (GNUNET_SCHEDULER_NO_TASK == n->notify_task)
862 GNUNET_assert (0 < n->reference_cnt);
864 GNUNET_SCHEDULER_cancel (n->notify_task);
865 n->notify_task = GNUNET_SCHEDULER_NO_TASK;
866 if (NULL == n->nl_head)
868 if ( (0 == n->reference_cnt) && (0 == n->inactive) )
871 GNUNET_TESTBED_operation_inactivate_ (n->conn_op);
875 trigger_notifications (n);
879 GST_neighbour_release_connection (struct Neighbour *n)
881 GNUNET_assert (0 == n->inactive);
882 GNUNET_assert (0 < n->reference_cnt);
884 if (0 == n->reference_cnt)
887 GNUNET_TESTBED_operation_inactivate_ (n->conn_op);
892 cleanup_ncc (struct NeighbourConnectCtxt *ncc)
895 GST_neighbour_get_connection_cancel (ncc->nh);
896 if (GNUNET_SCHEDULER_NO_TASK != ncc->timeout_task)
897 GNUNET_SCHEDULER_cancel (ncc->timeout_task);
898 GNUNET_SERVER_client_drop (ncc->client);
899 GNUNET_CONTAINER_DLL_remove (ncc_head, ncc_tail, ncc);
904 GST_neighbour_list_clean()
909 for (id = 0; id < neighbour_list_size; id++)
911 if (NULL == (n = neighbour_list[id]))
913 if (NULL != n->conn_op)
914 GNUNET_TESTBED_operation_release_ (n->conn_op);
916 neighbour_list[id] = NULL;
918 GNUNET_free_non_null (neighbour_list);
922 GST_get_neighbour (uint32_t id)
924 if (neighbour_list_size <= id)
927 return neighbour_list[id];
933 while (NULL != ncc_head)
934 cleanup_ncc (ncc_head);
938 timeout_neighbour_connect (void *cls,
939 const struct GNUNET_SCHEDULER_TaskContext *tc)
941 struct NeighbourConnectCtxt *ncc = cls;
943 ncc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
944 send_controller_link_response (ncc->client, ncc->op_id, NULL,
945 "Could not connect to delegated controller");
950 neighbour_connect_cb (void *cls, struct GNUNET_TESTBED_Controller *c)
952 struct NeighbourConnectCtxt *ncc = cls;
954 GNUNET_SCHEDULER_cancel (ncc->timeout_task);
955 ncc->timeout_task = GNUNET_SCHEDULER_NO_TASK;
957 GST_neighbour_release_connection (ncc->n);
958 send_controller_link_response (ncc->client, ncc->op_id, NULL, NULL);
963 * Message handler for GNUNET_MESSAGE_TYPE_TESTBED_LCONTROLLERS message
966 * @param client identification of the client
967 * @param message the actual message
970 GST_handle_link_controllers (void *cls, struct GNUNET_SERVER_Client *client,
971 const struct GNUNET_MessageHeader *message)
973 const struct GNUNET_TESTBED_ControllerLinkRequest *msg;
974 struct LCFContextQueue *lcfq;
976 struct Route *new_route;
978 uint32_t delegated_host_id;
979 uint32_t slave_host_id;
981 if (NULL == GST_context)
984 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
987 msg = (const struct GNUNET_TESTBED_ControllerLinkRequest *) message;
988 delegated_host_id = ntohl (msg->delegated_host_id);
989 if (delegated_host_id == GST_context->host_id)
992 LOG (GNUNET_ERROR_TYPE_WARNING, "Trying to link ourselves\n");
993 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
996 if ((delegated_host_id >= GST_host_list_size) ||
997 (NULL == GST_host_list[delegated_host_id]))
999 LOG (GNUNET_ERROR_TYPE_WARNING,
1000 "Delegated host %u not registered with us\n", delegated_host_id);
1001 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1004 slave_host_id = ntohl (msg->slave_host_id);
1005 if ((slave_host_id >= GST_host_list_size) ||
1006 (NULL == GST_host_list[slave_host_id]))
1008 LOG (GNUNET_ERROR_TYPE_WARNING, "Slave host %u not registered with us\n",
1010 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1013 if (slave_host_id == delegated_host_id)
1015 LOG (GNUNET_ERROR_TYPE_WARNING, "Slave and delegated host are same\n");
1016 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1019 op_id = GNUNET_ntohll (msg->operation_id);
1020 if (slave_host_id == GST_context->host_id) /* Link from us */
1022 struct Slave *slave;
1023 struct LinkControllersContext *lcc;
1026 if (1 != msg->is_subordinate)
1028 struct Neighbour *n;
1029 struct NeighbourConnectCtxt *ncc;
1031 if ((delegated_host_id < neighbour_list_size) &&
1032 (NULL != neighbour_list[delegated_host_id]))
1035 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1038 LOG_DEBUG ("Received request to establish a link to host %u\n",
1040 n = GNUNET_malloc (sizeof (struct Neighbour));
1041 n->host_id = delegated_host_id;
1042 neighbour_list_add (n); /* just add; connect on-demand */
1043 ncc = GNUNET_malloc (sizeof (struct NeighbourConnectCtxt));
1046 ncc->client = client;
1047 GNUNET_SERVER_client_keep (client);
1048 ncc->nh = GST_neighbour_get_connection (n, neighbour_connect_cb, ncc);
1049 ncc->timeout_task = GNUNET_SCHEDULER_add_delayed (GST_timeout,
1050 &timeout_neighbour_connect,
1052 GNUNET_CONTAINER_DLL_insert_tail (ncc_head, ncc_tail, ncc);
1053 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1056 if ((delegated_host_id < GST_slave_list_size) &&
1057 (NULL != GST_slave_list[delegated_host_id]))
1060 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1063 LOG_DEBUG ("Received request to start and establish a link to host %u\n",
1065 slave = GNUNET_malloc (sizeof (struct Slave));
1066 slave->host_id = delegated_host_id;
1067 slave->reghost_map = GNUNET_CONTAINER_multihashmap_create (100, GNUNET_NO);
1068 slave_list_add (slave);
1069 lcc = GNUNET_malloc (sizeof (struct LinkControllersContext));
1070 lcc->operation_id = op_id;
1071 GNUNET_SERVER_client_keep (client);
1072 lcc->client = client;
1074 slave->controller_proc =
1075 GNUNET_TESTBED_controller_start (GST_context->master_ip,
1076 GST_host_list[slave->host_id],
1077 &slave_status_callback, slave);
1078 new_route = GNUNET_malloc (sizeof (struct Route));
1079 new_route->dest = delegated_host_id;
1080 new_route->thru = GST_context->host_id;
1081 route_list_add (new_route);
1085 /* Route the request */
1086 if (slave_host_id >= route_list_size)
1088 LOG (GNUNET_ERROR_TYPE_WARNING, "No route towards slave host");
1089 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1092 lcfq = GNUNET_malloc (sizeof (struct LCFContextQueue));
1093 lcfq->lcf = GNUNET_malloc (sizeof (struct LCFContext));
1094 lcfq->lcf->type = CLOSURE_TYPE_LCF;
1095 lcfq->lcf->delegated_host_id = delegated_host_id;
1096 lcfq->lcf->slave_host_id = slave_host_id;
1097 route = GST_find_dest_route (slave_host_id);
1098 GNUNET_assert (NULL != route); /* because we add routes carefully */
1099 GNUNET_assert (route->dest < GST_slave_list_size);
1100 GNUNET_assert (NULL != GST_slave_list[route->dest]);
1101 lcfq->lcf->is_subordinate = msg->is_subordinate;
1102 lcfq->lcf->state = INIT;
1103 lcfq->lcf->operation_id = op_id;
1104 lcfq->lcf->gateway = GST_slave_list[route->dest];
1105 GNUNET_SERVER_client_keep (client);
1106 lcfq->lcf->client = client;
1107 if (NULL == lcfq_head)
1109 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == lcf_proc_task_id);
1110 GNUNET_CONTAINER_DLL_insert_tail (lcfq_head, lcfq_tail, lcfq);
1111 lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcfq->lcf);
1114 GNUNET_CONTAINER_DLL_insert_tail (lcfq_head, lcfq_tail, lcfq);
1115 /* FIXME: Adding a new route should happen after the controllers are linked
1117 if (1 != msg->is_subordinate)
1119 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1122 if ((delegated_host_id < route_list_size) &&
1123 (NULL != route_list[delegated_host_id]))
1125 GNUNET_break_op (0); /* Are you trying to link delegated host twice
1126 * with is subordinate flag set to GNUNET_YES? */
1127 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1130 new_route = GNUNET_malloc (sizeof (struct Route));
1131 new_route->dest = delegated_host_id;
1132 new_route->thru = route->dest;
1133 route_list_add (new_route);
1134 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1139 * Cleans up the queue used for forwarding link controllers requests
1144 struct LCFContextQueue *lcfq;
1146 if (NULL != lcfq_head)
1148 if (GNUNET_SCHEDULER_NO_TASK != lcf_proc_task_id)
1150 GNUNET_SCHEDULER_cancel (lcf_proc_task_id);
1151 lcf_proc_task_id = GNUNET_SCHEDULER_NO_TASK;
1154 GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == lcf_proc_task_id);
1155 for (lcfq = lcfq_head; NULL != lcfq; lcfq = lcfq_head)
1157 GNUNET_SERVER_client_drop (lcfq->lcf->client);
1158 GNUNET_free (lcfq->lcf);
1159 GNUNET_CONTAINER_DLL_remove (lcfq_head, lcfq_tail, lcfq);