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Diffstat (limited to 'src/testbed/gnunet-service-testbed_links.c')
-rw-r--r-- | src/testbed/gnunet-service-testbed_links.c | 1468 |
1 files changed, 0 insertions, 1468 deletions
diff --git a/src/testbed/gnunet-service-testbed_links.c b/src/testbed/gnunet-service-testbed_links.c deleted file mode 100644 index f4c27ffa2..000000000 --- a/src/testbed/gnunet-service-testbed_links.c +++ /dev/null | |||
@@ -1,1468 +0,0 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2008--2013 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software: you can redistribute it and/or modify it | ||
6 | under the terms of the GNU Affero General Public License as published | ||
7 | by the Free Software Foundation, either version 3 of the License, | ||
8 | or (at your option) any later version. | ||
9 | |||
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 | Affero General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Affero General Public License | ||
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
17 | |||
18 | SPDX-License-Identifier: AGPL3.0-or-later | ||
19 | */ | ||
20 | |||
21 | /** | ||
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 | ||
26 | */ | ||
27 | |||
28 | #include "platform.h" | ||
29 | #include "gnunet-service-testbed.h" | ||
30 | |||
31 | /** | ||
32 | * Redefine LOG with a changed log component string | ||
33 | */ | ||
34 | #ifdef LOG | ||
35 | #undef LOG | ||
36 | #endif | ||
37 | #define LOG(kind, ...) \ | ||
38 | GNUNET_log_from (kind, "testbed-links", __VA_ARGS__) | ||
39 | |||
40 | /** | ||
41 | * The event mask for the events we listen from sub-controllers | ||
42 | */ | ||
43 | #define EVENT_MASK (1LL << GNUNET_TESTBED_ET_OPERATION_FINISHED) | ||
44 | |||
45 | |||
46 | /** | ||
47 | * States of LCFContext | ||
48 | */ | ||
49 | enum LCFContextState | ||
50 | { | ||
51 | /** | ||
52 | * The Context has been initialized; Nothing has been done on it | ||
53 | */ | ||
54 | INIT, | ||
55 | |||
56 | /** | ||
57 | * Delegated host has been registered at the forwarding controller | ||
58 | */ | ||
59 | DELEGATED_HOST_REGISTERED, | ||
60 | |||
61 | /** | ||
62 | * The slave host has been registered at the forwarding controller | ||
63 | */ | ||
64 | SLAVE_HOST_REGISTERED, | ||
65 | |||
66 | /** | ||
67 | * The context has been finished (may have error) | ||
68 | */ | ||
69 | FINISHED | ||
70 | }; | ||
71 | |||
72 | |||
73 | /** | ||
74 | * Link controllers request forwarding context | ||
75 | */ | ||
76 | struct LCFContext | ||
77 | { | ||
78 | /** | ||
79 | * The LCFContext | ||
80 | */ | ||
81 | struct LCFContext *next; | ||
82 | |||
83 | /** | ||
84 | * The LCFContext | ||
85 | */ | ||
86 | struct LCFContext *prev; | ||
87 | |||
88 | /** | ||
89 | * The gateway which will pass the link message to delegated host | ||
90 | */ | ||
91 | struct Slave *gateway; | ||
92 | |||
93 | /** | ||
94 | * The client which has asked to perform this operation | ||
95 | */ | ||
96 | struct GNUNET_SERVICE_Client *client; | ||
97 | |||
98 | /** | ||
99 | * Handle for operations which are forwarded while linking controllers | ||
100 | */ | ||
101 | struct GNUNET_TESTBED_Operation *op; | ||
102 | |||
103 | /** | ||
104 | * The timeout task | ||
105 | */ | ||
106 | struct GNUNET_SCHEDULER_Task *timeout_task; | ||
107 | |||
108 | /** | ||
109 | * The id of the operation which created this context | ||
110 | */ | ||
111 | uint64_t operation_id; | ||
112 | |||
113 | /** | ||
114 | * should the slave controller start the delegated controller? | ||
115 | */ | ||
116 | int is_subordinate; | ||
117 | |||
118 | /** | ||
119 | * The state of this context | ||
120 | */ | ||
121 | enum LCFContextState state; | ||
122 | |||
123 | /** | ||
124 | * The delegated host | ||
125 | */ | ||
126 | uint32_t delegated_host_id; | ||
127 | |||
128 | /** | ||
129 | * The slave host | ||
130 | */ | ||
131 | uint32_t slave_host_id; | ||
132 | }; | ||
133 | |||
134 | |||
135 | /** | ||
136 | * Notification context to be used to notify when connection to the neighbour's | ||
137 | * controller is opened | ||
138 | */ | ||
139 | struct NeighbourConnectNotification | ||
140 | { | ||
141 | /** | ||
142 | * DLL next for inclusion in neighbour's list of notification requests | ||
143 | */ | ||
144 | struct NeighbourConnectNotification *next; | ||
145 | |||
146 | /** | ||
147 | * DLL prev | ||
148 | */ | ||
149 | struct NeighbourConnectNotification *prev; | ||
150 | |||
151 | /** | ||
152 | * The neighbour | ||
153 | */ | ||
154 | struct Neighbour *n; | ||
155 | |||
156 | /** | ||
157 | * The notification callback to call when we are connect to neighbour | ||
158 | */ | ||
159 | GST_NeighbourConnectNotifyCallback cb; | ||
160 | |||
161 | /** | ||
162 | * The closure for the above callback | ||
163 | */ | ||
164 | void *cb_cls; | ||
165 | }; | ||
166 | |||
167 | |||
168 | /** | ||
169 | * A connected controller which is not our child | ||
170 | */ | ||
171 | struct Neighbour | ||
172 | { | ||
173 | /** | ||
174 | * The controller handle | ||
175 | */ | ||
176 | struct GNUNET_TESTBED_Controller *controller; | ||
177 | |||
178 | /** | ||
179 | * Operation handle for opening a lateral connection to another controller. | ||
180 | * Will be NULL if the slave controller is started by this controller | ||
181 | */ | ||
182 | struct GNUNET_TESTBED_Operation *conn_op; | ||
183 | |||
184 | /** | ||
185 | * DLL head for the list of notification requests | ||
186 | */ | ||
187 | struct NeighbourConnectNotification *nl_head; | ||
188 | |||
189 | /** | ||
190 | * DLL tail for the list of notification requests | ||
191 | */ | ||
192 | struct NeighbourConnectNotification *nl_tail; | ||
193 | |||
194 | /** | ||
195 | * Task id for the task to call notifications from the notification list | ||
196 | */ | ||
197 | struct GNUNET_SCHEDULER_Task *notify_task; | ||
198 | |||
199 | /** | ||
200 | * How many references are present currently to this neighbour's connection | ||
201 | */ | ||
202 | unsigned int reference_cnt; | ||
203 | |||
204 | /** | ||
205 | * Is the conn_op inactivated? | ||
206 | */ | ||
207 | unsigned int inactive; | ||
208 | |||
209 | /** | ||
210 | * The id of the host this controller is running on | ||
211 | */ | ||
212 | uint32_t host_id; | ||
213 | }; | ||
214 | |||
215 | |||
216 | /** | ||
217 | * The neighbour list | ||
218 | */ | ||
219 | static struct Neighbour **neighbour_list; | ||
220 | |||
221 | /** | ||
222 | * The size of the neighbour list | ||
223 | */ | ||
224 | static unsigned int neighbour_list_size; | ||
225 | |||
226 | |||
227 | /** | ||
228 | * Context information for establishing a link to neighbour (Used is | ||
229 | * GST_handle_link_controllers() | ||
230 | */ | ||
231 | struct NeighbourConnectCtxt | ||
232 | { | ||
233 | /** | ||
234 | * DLL next for inclusion in the corresponding context list | ||
235 | */ | ||
236 | struct NeighbourConnectCtxt *next; | ||
237 | |||
238 | /** | ||
239 | * DLL tail | ||
240 | */ | ||
241 | struct NeighbourConnectCtxt *prev; | ||
242 | |||
243 | /** | ||
244 | * The neighbour to whom connection should be made | ||
245 | */ | ||
246 | struct Neighbour *n; | ||
247 | |||
248 | /** | ||
249 | * The client requesting the connection | ||
250 | */ | ||
251 | struct GNUNET_SERVICE_Client *client; | ||
252 | |||
253 | /** | ||
254 | * Task to be run upon timeout | ||
255 | */ | ||
256 | struct GNUNET_SCHEDULER_Task *timeout_task; | ||
257 | |||
258 | /** | ||
259 | * The notification handle associated with the neighbour's connection request | ||
260 | */ | ||
261 | struct NeighbourConnectNotification *nh; | ||
262 | |||
263 | /** | ||
264 | * The id of the link-controllers operation responsible for creating this | ||
265 | * context | ||
266 | */ | ||
267 | uint64_t op_id; | ||
268 | }; | ||
269 | |||
270 | /** | ||
271 | * DLL head for the list of neighbour connect contexts | ||
272 | */ | ||
273 | struct NeighbourConnectCtxt *ncc_head; | ||
274 | |||
275 | /** | ||
276 | * DLL tail for the list of neighbour connect contexts | ||
277 | */ | ||
278 | struct NeighbourConnectCtxt *ncc_tail; | ||
279 | |||
280 | /** | ||
281 | * A list of directly linked neighbours | ||
282 | */ | ||
283 | struct Slave **GST_slave_list; | ||
284 | |||
285 | /** | ||
286 | * The size of directly linked neighbours list | ||
287 | */ | ||
288 | unsigned int GST_slave_list_size; | ||
289 | |||
290 | /** | ||
291 | * A list of routes | ||
292 | */ | ||
293 | static struct Route **route_list; | ||
294 | |||
295 | /** | ||
296 | * The LCF queue | ||
297 | */ | ||
298 | static struct LCFContext *lcf_head; | ||
299 | |||
300 | /** | ||
301 | * The tail for the LCF queue | ||
302 | */ | ||
303 | static struct LCFContext *lcf_tail; | ||
304 | |||
305 | /** | ||
306 | * The lcf_task handle | ||
307 | */ | ||
308 | static struct GNUNET_SCHEDULER_Task *lcf_proc_task_id; | ||
309 | |||
310 | /** | ||
311 | * The size of the route list | ||
312 | */ | ||
313 | static unsigned int route_list_size; | ||
314 | |||
315 | |||
316 | /** | ||
317 | * Adds a slave to the slave array | ||
318 | * | ||
319 | * @param slave the slave controller to add | ||
320 | */ | ||
321 | static void | ||
322 | slave_list_add (struct Slave *slave) | ||
323 | { | ||
324 | if (slave->host_id >= GST_slave_list_size) | ||
325 | GST_array_grow_large_enough (GST_slave_list, | ||
326 | GST_slave_list_size, | ||
327 | slave->host_id); | ||
328 | GNUNET_assert (NULL == GST_slave_list[slave->host_id]); | ||
329 | GST_slave_list[slave->host_id] = slave; | ||
330 | } | ||
331 | |||
332 | |||
333 | /** | ||
334 | * Clean up all forwarded operation overlay context matching the | ||
335 | * client given in @a cls. | ||
336 | * | ||
337 | * @param cls a `struct GNUNET_SERVICE_Client *` to match | ||
338 | * @param key unused | ||
339 | * @param value the `struct RegisteredHostContext` to search for @a cls | ||
340 | * @return #GNUNET_OK (continue iterating) | ||
341 | */ | ||
342 | static int | ||
343 | drop_client_entries (void *cls, | ||
344 | const struct GNUNET_HashCode *key, | ||
345 | void *value) | ||
346 | { | ||
347 | struct GNUNET_SERVICE_Client *client = cls; | ||
348 | struct RegisteredHostContext *rhc = value; | ||
349 | struct ForwardedOverlayConnectContext *focc; | ||
350 | struct ForwardedOverlayConnectContext *foccn; | ||
351 | |||
352 | for (focc = rhc->focc_dll_head; NULL != focc; focc = foccn) | ||
353 | { | ||
354 | foccn = focc->next; | ||
355 | if (focc->client == client) | ||
356 | GST_cleanup_focc (focc); | ||
357 | } | ||
358 | return GNUNET_OK; | ||
359 | } | ||
360 | |||
361 | |||
362 | /** | ||
363 | * Adds a route to the route list | ||
364 | * | ||
365 | * @param route the route to add | ||
366 | */ | ||
367 | static void | ||
368 | route_list_add (struct Route *route) | ||
369 | { | ||
370 | if (route->dest >= route_list_size) | ||
371 | GST_array_grow_large_enough (route_list, route_list_size, route->dest); | ||
372 | GNUNET_assert (NULL == route_list[route->dest]); | ||
373 | route_list[route->dest] = route; | ||
374 | } | ||
375 | |||
376 | |||
377 | /** | ||
378 | * Add a neighbour to the neighbour list. Grows the neighbour list | ||
379 | * automatically. | ||
380 | * | ||
381 | * @param n the neighbour to add | ||
382 | */ | ||
383 | static void | ||
384 | neighbour_list_add (struct Neighbour *n) | ||
385 | { | ||
386 | if (n->host_id >= neighbour_list_size) | ||
387 | GST_array_grow_large_enough (neighbour_list, neighbour_list_size, | ||
388 | n->host_id); | ||
389 | GNUNET_assert (NULL == neighbour_list[n->host_id]); | ||
390 | neighbour_list[n->host_id] = n; | ||
391 | } | ||
392 | |||
393 | |||
394 | /** | ||
395 | * Cleans up the route list | ||
396 | */ | ||
397 | void | ||
398 | GST_route_list_clear () | ||
399 | { | ||
400 | unsigned int id; | ||
401 | |||
402 | for (id = 0; id < route_list_size; id++) | ||
403 | if (NULL != route_list[id]) | ||
404 | GNUNET_free (route_list[id]); | ||
405 | GNUNET_free (route_list); | ||
406 | route_list = NULL; | ||
407 | } | ||
408 | |||
409 | |||
410 | /** | ||
411 | * Iterator for freeing hash map entries in a slave's reghost_map | ||
412 | * | ||
413 | * @param cls handle to the slave | ||
414 | * @param key current key code | ||
415 | * @param value value in the hash map | ||
416 | * @return #GNUNET_YES if we should continue to iterate, | ||
417 | * #GNUNET_NO if not. | ||
418 | */ | ||
419 | static int | ||
420 | reghost_free_iterator (void *cls, | ||
421 | const struct GNUNET_HashCode *key, | ||
422 | void *value) | ||
423 | { | ||
424 | struct Slave *slave = cls; | ||
425 | struct RegisteredHostContext *rhc = value; | ||
426 | struct ForwardedOverlayConnectContext *focc; | ||
427 | |||
428 | GNUNET_assert (GNUNET_YES == | ||
429 | GNUNET_CONTAINER_multihashmap_remove (slave->reghost_map, key, | ||
430 | value)); | ||
431 | while (NULL != (focc = rhc->focc_dll_head)) | ||
432 | GST_cleanup_focc (focc); | ||
433 | GNUNET_free (value); | ||
434 | return GNUNET_YES; | ||
435 | } | ||
436 | |||
437 | |||
438 | /** | ||
439 | * Kill a #Slave object | ||
440 | * | ||
441 | * @param slave the #Slave object | ||
442 | */ | ||
443 | static void | ||
444 | kill_slave (struct Slave *slave) | ||
445 | { | ||
446 | struct HostRegistration *hr_entry; | ||
447 | |||
448 | while (NULL != (hr_entry = slave->hr_dll_head)) | ||
449 | { | ||
450 | GNUNET_CONTAINER_DLL_remove (slave->hr_dll_head, slave->hr_dll_tail, | ||
451 | hr_entry); | ||
452 | GNUNET_free (hr_entry); | ||
453 | } | ||
454 | if (NULL != slave->rhandle) | ||
455 | GNUNET_TESTBED_cancel_registration (slave->rhandle); | ||
456 | GNUNET_assert (GNUNET_SYSERR != | ||
457 | GNUNET_CONTAINER_multihashmap_iterate (slave->reghost_map, | ||
458 | reghost_free_iterator, | ||
459 | slave)); | ||
460 | GNUNET_CONTAINER_multihashmap_destroy (slave->reghost_map); | ||
461 | if (NULL != slave->controller) | ||
462 | GNUNET_TESTBED_controller_disconnect (slave->controller); | ||
463 | if (NULL != slave->controller_proc) | ||
464 | { | ||
465 | LOG_DEBUG ("Stopping a slave\n"); | ||
466 | GNUNET_TESTBED_controller_kill_ (slave->controller_proc); | ||
467 | } | ||
468 | } | ||
469 | |||
470 | |||
471 | /** | ||
472 | * Destroy a #Slave object | ||
473 | * | ||
474 | * @param slave the #Slave object | ||
475 | */ | ||
476 | static void | ||
477 | destroy_slave (struct Slave *slave) | ||
478 | { | ||
479 | if (NULL != slave->controller_proc) | ||
480 | { | ||
481 | GNUNET_TESTBED_controller_destroy_ (slave->controller_proc); | ||
482 | LOG_DEBUG ("Slave stopped\n"); | ||
483 | } | ||
484 | GST_slave_list[slave->host_id] = NULL; | ||
485 | GNUNET_free (slave); | ||
486 | } | ||
487 | |||
488 | |||
489 | /** | ||
490 | * Cleans up the slave list | ||
491 | */ | ||
492 | void | ||
493 | GST_slave_list_clear () | ||
494 | { | ||
495 | struct Slave *slave; | ||
496 | unsigned int id; | ||
497 | |||
498 | for (id = 0; id < GST_slave_list_size; id++) | ||
499 | { | ||
500 | slave = GST_slave_list[id]; | ||
501 | if (NULL == slave) | ||
502 | continue; | ||
503 | kill_slave (slave); | ||
504 | } | ||
505 | for (id = 0; id < GST_slave_list_size; id++) | ||
506 | { | ||
507 | slave = GST_slave_list[id]; | ||
508 | if (NULL == slave) | ||
509 | continue; | ||
510 | destroy_slave (slave); | ||
511 | } | ||
512 | GNUNET_free (GST_slave_list); | ||
513 | GST_slave_list = NULL; | ||
514 | } | ||
515 | |||
516 | |||
517 | /** | ||
518 | * Finds the route with directly connected host as destination through which | ||
519 | * the destination host can be reached | ||
520 | * | ||
521 | * @param host_id the id of the destination host | ||
522 | * @return the route with directly connected destination host; NULL if no route | ||
523 | * is found | ||
524 | */ | ||
525 | struct Route * | ||
526 | GST_find_dest_route (uint32_t host_id) | ||
527 | { | ||
528 | struct Route *route; | ||
529 | |||
530 | if (route_list_size <= host_id) | ||
531 | return NULL; | ||
532 | while (NULL != (route = route_list[host_id])) | ||
533 | { | ||
534 | if (route->thru == GST_context->host_id) | ||
535 | break; | ||
536 | host_id = route->thru; | ||
537 | } | ||
538 | return route; | ||
539 | } | ||
540 | |||
541 | |||
542 | /** | ||
543 | * Function to send a failure response for controller link operation | ||
544 | * | ||
545 | * @param client the client to send the message to | ||
546 | * @param operation_id the operation ID of the controller link request | ||
547 | * @param cfg the configuration with which the delegated controller is started. | ||
548 | * Can be NULL if the delegated controller is not started but just | ||
549 | * linked to. | ||
550 | * @param emsg set to an error message explaining why the controller link | ||
551 | * failed. Setting this to NULL signifies success. !This should be | ||
552 | * NULL if cfg is set! | ||
553 | */ | ||
554 | static void | ||
555 | send_controller_link_response (struct GNUNET_SERVICE_Client *client, | ||
556 | uint64_t operation_id, | ||
557 | const struct GNUNET_CONFIGURATION_Handle *cfg, | ||
558 | const char *emsg) | ||
559 | { | ||
560 | struct GNUNET_MQ_Envelope *env; | ||
561 | struct GNUNET_TESTBED_ControllerLinkResponse *msg; | ||
562 | char *xconfig; | ||
563 | size_t config_size; | ||
564 | size_t xconfig_size; | ||
565 | uint16_t msize; | ||
566 | |||
567 | GNUNET_assert ((NULL == cfg) || (NULL == emsg)); | ||
568 | xconfig = NULL; | ||
569 | xconfig_size = 0; | ||
570 | config_size = 0; | ||
571 | msize = 0; | ||
572 | if (NULL != cfg) | ||
573 | { | ||
574 | xconfig = GNUNET_TESTBED_compress_cfg_ (cfg, | ||
575 | &config_size, | ||
576 | &xconfig_size); | ||
577 | msize += xconfig_size; | ||
578 | } | ||
579 | if (NULL != emsg) | ||
580 | msize += strlen (emsg); | ||
581 | env = GNUNET_MQ_msg_extra (msg, | ||
582 | msize, | ||
583 | GNUNET_MESSAGE_TYPE_TESTBED_LINK_CONTROLLERS_RESULT); | ||
584 | if (NULL == emsg) | ||
585 | msg->success = htons (GNUNET_YES); | ||
586 | msg->operation_id = GNUNET_htonll (operation_id); | ||
587 | msg->config_size = htons ((uint16_t) config_size); | ||
588 | if (NULL != xconfig) | ||
589 | { | ||
590 | GNUNET_memcpy (&msg[1], | ||
591 | xconfig, | ||
592 | xconfig_size); | ||
593 | GNUNET_free (xconfig); | ||
594 | } | ||
595 | if (NULL != emsg) | ||
596 | GNUNET_memcpy (&msg[1], | ||
597 | emsg, | ||
598 | strlen (emsg)); | ||
599 | GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq (client), | ||
600 | env); | ||
601 | } | ||
602 | |||
603 | |||
604 | /** | ||
605 | * The Link Controller forwarding task | ||
606 | * | ||
607 | * @param cls the LCFContext | ||
608 | */ | ||
609 | static void | ||
610 | lcf_proc_task (void *cls); | ||
611 | |||
612 | |||
613 | /** | ||
614 | * Completion callback for host registrations while forwarding Link Controller messages | ||
615 | * | ||
616 | * @param cls the LCFContext | ||
617 | * @param emsg the error message; NULL if host registration is successful | ||
618 | */ | ||
619 | static void | ||
620 | lcf_proc_cc (void *cls, | ||
621 | const char *emsg) | ||
622 | { | ||
623 | struct LCFContext *lcf = cls; | ||
624 | |||
625 | GNUNET_assert (NULL == lcf_proc_task_id); | ||
626 | switch (lcf->state) | ||
627 | { | ||
628 | case INIT: | ||
629 | if (NULL != emsg) | ||
630 | goto registration_error; | ||
631 | lcf->state = DELEGATED_HOST_REGISTERED; | ||
632 | lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf); | ||
633 | break; | ||
634 | |||
635 | case DELEGATED_HOST_REGISTERED: | ||
636 | if (NULL != emsg) | ||
637 | goto registration_error; | ||
638 | lcf->state = SLAVE_HOST_REGISTERED; | ||
639 | lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf); | ||
640 | break; | ||
641 | |||
642 | default: | ||
643 | GNUNET_assert (0); /* Shouldn't reach here */ | ||
644 | } | ||
645 | return; | ||
646 | |||
647 | registration_error: | ||
648 | LOG (GNUNET_ERROR_TYPE_WARNING, | ||
649 | "Host registration failed with message: %s\n", | ||
650 | emsg); | ||
651 | lcf->state = FINISHED; | ||
652 | lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, | ||
653 | lcf); | ||
654 | } | ||
655 | |||
656 | |||
657 | /** | ||
658 | * The Link Controller forwarding task | ||
659 | * | ||
660 | * @param cls the LCFContext | ||
661 | */ | ||
662 | static void | ||
663 | lcf_proc_task (void *cls); | ||
664 | |||
665 | |||
666 | /** | ||
667 | * Task to free resources when forwarded link controllers has been timedout | ||
668 | * | ||
669 | * @param cls the LCFContext | ||
670 | */ | ||
671 | static void | ||
672 | lcf_forwarded_operation_timeout (void *cls) | ||
673 | { | ||
674 | struct LCFContext *lcf = cls; | ||
675 | |||
676 | lcf->timeout_task = NULL; | ||
677 | // GST_forwarded_operation_timeout (lcf->fopc, tc); | ||
678 | LOG (GNUNET_ERROR_TYPE_WARNING, | ||
679 | "A forwarded controller link operation has timed out\n"); | ||
680 | send_controller_link_response (lcf->client, | ||
681 | lcf->operation_id, | ||
682 | NULL, | ||
683 | "A forwarded controller link operation has timed out\n"); | ||
684 | GNUNET_assert (NULL == lcf_proc_task_id); | ||
685 | lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, | ||
686 | lcf); | ||
687 | } | ||
688 | |||
689 | |||
690 | /** | ||
691 | * The Link Controller forwarding task | ||
692 | * | ||
693 | * @param cls the LCFContext | ||
694 | */ | ||
695 | static void | ||
696 | lcf_proc_task (void *cls) | ||
697 | { | ||
698 | struct LCFContext *lcf = cls; | ||
699 | |||
700 | lcf_proc_task_id = NULL; | ||
701 | switch (lcf->state) | ||
702 | { | ||
703 | case INIT: | ||
704 | if (GNUNET_NO == | ||
705 | GNUNET_TESTBED_is_host_registered_ (GST_host_list | ||
706 | [lcf->delegated_host_id], | ||
707 | lcf->gateway->controller)) | ||
708 | { | ||
709 | GST_queue_host_registration (lcf->gateway, lcf_proc_cc, lcf, | ||
710 | GST_host_list[lcf->delegated_host_id]); | ||
711 | } | ||
712 | else | ||
713 | { | ||
714 | lcf->state = DELEGATED_HOST_REGISTERED; | ||
715 | lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf); | ||
716 | } | ||
717 | break; | ||
718 | |||
719 | case DELEGATED_HOST_REGISTERED: | ||
720 | if (GNUNET_NO == | ||
721 | GNUNET_TESTBED_is_host_registered_ (GST_host_list[lcf->slave_host_id], | ||
722 | lcf->gateway->controller)) | ||
723 | { | ||
724 | GST_queue_host_registration (lcf->gateway, lcf_proc_cc, lcf, | ||
725 | GST_host_list[lcf->slave_host_id]); | ||
726 | } | ||
727 | else | ||
728 | { | ||
729 | lcf->state = SLAVE_HOST_REGISTERED; | ||
730 | lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf); | ||
731 | } | ||
732 | break; | ||
733 | |||
734 | case SLAVE_HOST_REGISTERED: | ||
735 | lcf->op = GNUNET_TESTBED_controller_link (lcf, | ||
736 | lcf->gateway->controller, | ||
737 | GST_host_list[lcf-> | ||
738 | delegated_host_id], | ||
739 | GST_host_list[lcf->slave_host_id], | ||
740 | lcf->is_subordinate); | ||
741 | lcf->timeout_task = | ||
742 | GNUNET_SCHEDULER_add_delayed (GST_timeout, | ||
743 | &lcf_forwarded_operation_timeout, | ||
744 | lcf); | ||
745 | lcf->state = FINISHED; | ||
746 | break; | ||
747 | |||
748 | case FINISHED: | ||
749 | if (NULL != lcf->op) | ||
750 | GNUNET_TESTBED_operation_done (lcf->op); | ||
751 | GNUNET_CONTAINER_DLL_remove (lcf_head, | ||
752 | lcf_tail, | ||
753 | lcf); | ||
754 | GNUNET_free (lcf); | ||
755 | if (NULL != lcf_head) | ||
756 | lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, | ||
757 | lcf_head); | ||
758 | } | ||
759 | } | ||
760 | |||
761 | |||
762 | /** | ||
763 | * Callback for event from slave controllers | ||
764 | * | ||
765 | * @param cls NULL | ||
766 | * @param event information about the event | ||
767 | */ | ||
768 | static void | ||
769 | slave_event_cb (void *cls, const struct GNUNET_TESTBED_EventInformation *event) | ||
770 | { | ||
771 | struct LCFContext *lcf; | ||
772 | |||
773 | /* We currently only get here when working on LCFContexts */ | ||
774 | GNUNET_assert (GNUNET_TESTBED_ET_OPERATION_FINISHED == event->type); | ||
775 | lcf = event->op_cls; | ||
776 | GNUNET_assert (lcf->op == event->op); | ||
777 | GNUNET_TESTBED_operation_done (lcf->op); | ||
778 | lcf->op = NULL; | ||
779 | GNUNET_assert (FINISHED == lcf->state); | ||
780 | GNUNET_assert (NULL != lcf->timeout_task); | ||
781 | GNUNET_SCHEDULER_cancel (lcf->timeout_task); | ||
782 | if (NULL == event->details.operation_finished.emsg) | ||
783 | send_controller_link_response (lcf->client, lcf->operation_id, | ||
784 | GNUNET_TESTBED_host_get_cfg_ | ||
785 | (GST_host_list[lcf->delegated_host_id]), | ||
786 | NULL); | ||
787 | else | ||
788 | send_controller_link_response (lcf->client, lcf->operation_id, | ||
789 | NULL, | ||
790 | event->details.operation_finished.emsg); | ||
791 | GNUNET_assert (NULL == lcf_proc_task_id); | ||
792 | lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf); | ||
793 | return; | ||
794 | } | ||
795 | |||
796 | |||
797 | /** | ||
798 | * Callback to signal successful startup of the controller process | ||
799 | * | ||
800 | * @param cls the handle to the slave whose status is to be found here | ||
801 | * @param cfg the configuration with which the controller has been started; | ||
802 | * NULL if status is not #GNUNET_OK | ||
803 | * @param status #GNUNET_OK if the startup is successful; #GNUNET_SYSERR if not, | ||
804 | * GNUNET_TESTBED_controller_stop() shouldn't be called in this case | ||
805 | */ | ||
806 | static void | ||
807 | slave_status_cb (void *cls, | ||
808 | const struct GNUNET_CONFIGURATION_Handle *cfg, | ||
809 | int status) | ||
810 | { | ||
811 | struct Slave *slave = cls; | ||
812 | struct LinkControllersContext *lcc; | ||
813 | |||
814 | lcc = slave->lcc; | ||
815 | if (GNUNET_SYSERR == status) | ||
816 | { | ||
817 | slave->controller_proc = NULL; | ||
818 | /* Stop all link controller forwarding tasks since we shutdown here anyway | ||
819 | and as these tasks they depend on the operation queues which are created | ||
820 | through GNUNET_TESTBED_controller_connect() and in kill_slave() we call | ||
821 | the destructor function GNUNET_TESTBED_controller_disconnect() */ | ||
822 | GST_free_lcf (); | ||
823 | kill_slave (slave); | ||
824 | destroy_slave (slave); | ||
825 | slave = NULL; | ||
826 | LOG (GNUNET_ERROR_TYPE_WARNING, "Unexpected slave shutdown\n"); | ||
827 | GNUNET_SCHEDULER_shutdown (); /* We too shutdown */ | ||
828 | goto clean_lcc; | ||
829 | } | ||
830 | slave->controller = | ||
831 | GNUNET_TESTBED_controller_connect (GST_host_list[slave->host_id], | ||
832 | EVENT_MASK, &slave_event_cb, | ||
833 | slave); | ||
834 | if (NULL != slave->controller) | ||
835 | { | ||
836 | send_controller_link_response (lcc->client, lcc->operation_id, cfg, NULL); | ||
837 | } | ||
838 | else | ||
839 | { | ||
840 | send_controller_link_response (lcc->client, lcc->operation_id, NULL, | ||
841 | "Could not connect to delegated controller"); | ||
842 | kill_slave (slave); | ||
843 | destroy_slave (slave); | ||
844 | slave = NULL; | ||
845 | } | ||
846 | |||
847 | clean_lcc: | ||
848 | if (NULL != lcc) | ||
849 | { | ||
850 | if (NULL != lcc->client) | ||
851 | { | ||
852 | GNUNET_SERVICE_client_continue (lcc->client); | ||
853 | lcc->client = NULL; | ||
854 | } | ||
855 | GNUNET_free (lcc); | ||
856 | } | ||
857 | if (NULL != slave) | ||
858 | slave->lcc = NULL; | ||
859 | } | ||
860 | |||
861 | |||
862 | /** | ||
863 | * Trigger notification task if there are notification requests currently | ||
864 | * waiting in the given neighbour. Also activates the neighbour connect operation | ||
865 | * if it was previously inactivated so that the connection to the neighbour can | ||
866 | * be re-used | ||
867 | * | ||
868 | * @param n the neighbour | ||
869 | */ | ||
870 | static void | ||
871 | trigger_notifications (struct Neighbour *n); | ||
872 | |||
873 | |||
874 | /** | ||
875 | * Task to call the notification queued in the notifications list of the given | ||
876 | * neighbour | ||
877 | * | ||
878 | * @param cls the neighbour | ||
879 | */ | ||
880 | static void | ||
881 | neighbour_connect_notify_task (void *cls) | ||
882 | { | ||
883 | struct Neighbour *n = cls; | ||
884 | struct NeighbourConnectNotification *h; | ||
885 | |||
886 | GNUNET_assert (NULL != (h = n->nl_head)); | ||
887 | GNUNET_assert (NULL != n->notify_task); | ||
888 | n->notify_task = NULL; | ||
889 | GNUNET_assert (NULL != n->controller); | ||
890 | GNUNET_CONTAINER_DLL_remove (n->nl_head, n->nl_tail, h); | ||
891 | trigger_notifications (n); | ||
892 | h->cb (h->cb_cls, n->controller); | ||
893 | GNUNET_free (h); | ||
894 | } | ||
895 | |||
896 | |||
897 | /** | ||
898 | * Trigger notification task if there are notification requests currently | ||
899 | * waiting in the given neighbour. Also activates the neighbour connect operation | ||
900 | * if it was previously inactivated so that the connection to the neighbour can | ||
901 | * be re-used | ||
902 | * | ||
903 | * @param n the neighbour | ||
904 | */ | ||
905 | static void | ||
906 | trigger_notifications (struct Neighbour *n) | ||
907 | { | ||
908 | GNUNET_assert (NULL != n->conn_op); | ||
909 | if (NULL == n->nl_head) | ||
910 | return; | ||
911 | if (NULL == n->controller) | ||
912 | return; | ||
913 | if (NULL != n->notify_task) | ||
914 | return; | ||
915 | if (1 == n->inactive) | ||
916 | { | ||
917 | GNUNET_assert (0 == n->reference_cnt); | ||
918 | GNUNET_TESTBED_operation_activate_ (n->conn_op); | ||
919 | n->inactive = 0; | ||
920 | } | ||
921 | n->reference_cnt++; | ||
922 | n->notify_task = | ||
923 | GNUNET_SCHEDULER_add_now (&neighbour_connect_notify_task, n); | ||
924 | } | ||
925 | |||
926 | |||
927 | /** | ||
928 | * Callback to be called when the neighbour connect operation is started. The | ||
929 | * connection to the neighbour is opened here and any pending notifications are | ||
930 | * trigger. | ||
931 | * | ||
932 | * @param cls the neighbour | ||
933 | */ | ||
934 | static void | ||
935 | opstart_neighbour_conn (void *cls) | ||
936 | { | ||
937 | struct Neighbour *n = cls; | ||
938 | |||
939 | GNUNET_assert (NULL != n->conn_op); | ||
940 | GNUNET_assert (NULL == n->controller); | ||
941 | LOG_DEBUG ("Opening connection to controller on host %u\n", n->host_id); | ||
942 | n->controller = GNUNET_TESTBED_controller_connect (GST_host_list[n->host_id], | ||
943 | EVENT_MASK, | ||
944 | &slave_event_cb, | ||
945 | NULL); | ||
946 | trigger_notifications (n); | ||
947 | } | ||
948 | |||
949 | |||
950 | /** | ||
951 | * Callback to be called when the neighbour connect operation is released | ||
952 | * | ||
953 | * @param cls the neighbour | ||
954 | */ | ||
955 | static void | ||
956 | oprelease_neighbour_conn (void *cls) | ||
957 | { | ||
958 | struct Neighbour *n = cls; | ||
959 | |||
960 | GNUNET_assert (0 == n->reference_cnt); | ||
961 | GNUNET_assert (NULL == n->notify_task); | ||
962 | GNUNET_assert (NULL == n->nl_head); | ||
963 | if (NULL != n->controller) | ||
964 | { | ||
965 | LOG_DEBUG ("Closing connection to controller on host %u\n", n->host_id); | ||
966 | GNUNET_TESTBED_controller_disconnect (n->controller); | ||
967 | n->controller = NULL; | ||
968 | } | ||
969 | n->conn_op = NULL; | ||
970 | n->inactive = 0; | ||
971 | } | ||
972 | |||
973 | |||
974 | /** | ||
975 | * Try to open a connection to the given neighbour. If the connection is open | ||
976 | * already, then it is re-used. If not, the request is queued in the operation | ||
977 | * queues responsible for bounding the total number of file descriptors. The | ||
978 | * actual connection will happen when the operation queue marks the | ||
979 | * corresponding operation as active. | ||
980 | * | ||
981 | * @param n the neighbour to open a connection to | ||
982 | * @param cb the notification callback to call when the connection is opened | ||
983 | * @param cb_cls the closure for the above callback | ||
984 | */ | ||
985 | struct NeighbourConnectNotification * | ||
986 | GST_neighbour_get_connection (struct Neighbour *n, | ||
987 | GST_NeighbourConnectNotifyCallback cb, | ||
988 | void *cb_cls) | ||
989 | { | ||
990 | struct NeighbourConnectNotification *h; | ||
991 | |||
992 | GNUNET_assert (NULL != cb); | ||
993 | LOG_DEBUG ("Attempting to get connection to controller on host %u\n", | ||
994 | n->host_id); | ||
995 | h = GNUNET_new (struct NeighbourConnectNotification); | ||
996 | h->n = n; | ||
997 | h->cb = cb; | ||
998 | h->cb_cls = cb_cls; | ||
999 | GNUNET_CONTAINER_DLL_insert_tail (n->nl_head, n->nl_tail, h); | ||
1000 | if (NULL == n->conn_op) | ||
1001 | { | ||
1002 | GNUNET_assert (NULL == n->controller); | ||
1003 | n->conn_op = GNUNET_TESTBED_operation_create_ (n, &opstart_neighbour_conn, | ||
1004 | &oprelease_neighbour_conn); | ||
1005 | GNUNET_TESTBED_operation_queue_insert_ (GST_opq_openfds, n->conn_op); | ||
1006 | GNUNET_TESTBED_operation_begin_wait_ (n->conn_op); | ||
1007 | return h; | ||
1008 | } | ||
1009 | trigger_notifications (n); | ||
1010 | return h; | ||
1011 | } | ||
1012 | |||
1013 | |||
1014 | /** | ||
1015 | * Cancel the request for opening a connection to the neighbour | ||
1016 | * | ||
1017 | * @param h the notification handle | ||
1018 | */ | ||
1019 | void | ||
1020 | GST_neighbour_get_connection_cancel (struct NeighbourConnectNotification *h) | ||
1021 | { | ||
1022 | struct Neighbour *n; | ||
1023 | int cleanup_task; | ||
1024 | |||
1025 | n = h->n; | ||
1026 | cleanup_task = (h == n->nl_head) ? GNUNET_YES : GNUNET_NO; | ||
1027 | GNUNET_CONTAINER_DLL_remove (n->nl_head, n->nl_tail, h); | ||
1028 | GNUNET_free (h); | ||
1029 | if (GNUNET_NO == cleanup_task) | ||
1030 | return; | ||
1031 | if (NULL == n->notify_task) | ||
1032 | return; | ||
1033 | GNUNET_assert (0 < n->reference_cnt); | ||
1034 | n->reference_cnt--; | ||
1035 | GNUNET_SCHEDULER_cancel (n->notify_task); | ||
1036 | n->notify_task = NULL; | ||
1037 | if (NULL == n->nl_head) | ||
1038 | { | ||
1039 | if ((0 == n->reference_cnt) && (0 == n->inactive)) | ||
1040 | { | ||
1041 | n->inactive = 1; | ||
1042 | GNUNET_TESTBED_operation_inactivate_ (n->conn_op); | ||
1043 | } | ||
1044 | return; | ||
1045 | } | ||
1046 | trigger_notifications (n); | ||
1047 | } | ||
1048 | |||
1049 | |||
1050 | /** | ||
1051 | * Release the connection to the neighbour. The actual connection will be | ||
1052 | * closed if connections to other neighbour are waiting (to maintain a bound on | ||
1053 | * the total number of connections that are open). | ||
1054 | * | ||
1055 | * @param n the neighbour whose connection can be closed | ||
1056 | */ | ||
1057 | void | ||
1058 | GST_neighbour_release_connection (struct Neighbour *n) | ||
1059 | { | ||
1060 | GNUNET_assert (0 == n->inactive); | ||
1061 | GNUNET_assert (0 < n->reference_cnt); | ||
1062 | n->reference_cnt--; | ||
1063 | if (0 == n->reference_cnt) | ||
1064 | { | ||
1065 | n->inactive = 1; | ||
1066 | GNUNET_TESTBED_operation_inactivate_ (n->conn_op); | ||
1067 | } | ||
1068 | } | ||
1069 | |||
1070 | |||
1071 | /** | ||
1072 | * Cleanup neighbour connect contexts | ||
1073 | * | ||
1074 | * @param ncc the neighbour connect context to cleanup | ||
1075 | */ | ||
1076 | static void | ||
1077 | cleanup_ncc (struct NeighbourConnectCtxt *ncc) | ||
1078 | { | ||
1079 | if (NULL != ncc->nh) | ||
1080 | GST_neighbour_get_connection_cancel (ncc->nh); | ||
1081 | if (NULL != ncc->timeout_task) | ||
1082 | GNUNET_SCHEDULER_cancel (ncc->timeout_task); | ||
1083 | GNUNET_CONTAINER_DLL_remove (ncc_head, | ||
1084 | ncc_tail, | ||
1085 | ncc); | ||
1086 | GNUNET_free (ncc); | ||
1087 | } | ||
1088 | |||
1089 | |||
1090 | /** | ||
1091 | * Cleans up the neighbour list | ||
1092 | */ | ||
1093 | void | ||
1094 | GST_neighbour_list_clean () | ||
1095 | { | ||
1096 | struct Neighbour *n; | ||
1097 | unsigned int id; | ||
1098 | |||
1099 | for (id = 0; id < neighbour_list_size; id++) | ||
1100 | { | ||
1101 | if (NULL == (n = neighbour_list[id])) | ||
1102 | continue; | ||
1103 | if (NULL != n->conn_op) | ||
1104 | GNUNET_TESTBED_operation_release_ (n->conn_op); | ||
1105 | GNUNET_free (n); | ||
1106 | neighbour_list[id] = NULL; | ||
1107 | } | ||
1108 | GNUNET_free (neighbour_list); | ||
1109 | } | ||
1110 | |||
1111 | |||
1112 | /** | ||
1113 | * Get a neighbour from the neighbour list | ||
1114 | * | ||
1115 | * @param id the index of the neighbour in the neighbour list | ||
1116 | * @return the Neighbour; NULL if the given index in invalid (index greater than | ||
1117 | * the list size or neighbour at that index is NULL) | ||
1118 | */ | ||
1119 | struct Neighbour * | ||
1120 | GST_get_neighbour (uint32_t id) | ||
1121 | { | ||
1122 | if (neighbour_list_size <= id) | ||
1123 | return NULL; | ||
1124 | return neighbour_list[id]; | ||
1125 | } | ||
1126 | |||
1127 | |||
1128 | /** | ||
1129 | * Function to cleanup the neighbour connect contexts | ||
1130 | */ | ||
1131 | void | ||
1132 | GST_free_nccq () | ||
1133 | { | ||
1134 | while (NULL != ncc_head) | ||
1135 | cleanup_ncc (ncc_head); | ||
1136 | } | ||
1137 | |||
1138 | |||
1139 | /** | ||
1140 | * Task to be run upon timeout while attempting to connect to the neighbour | ||
1141 | * | ||
1142 | * @param cls the NeighbourConnectCtxt created in GST_handle_link_controllers() | ||
1143 | */ | ||
1144 | static void | ||
1145 | timeout_neighbour_connect (void *cls) | ||
1146 | { | ||
1147 | struct NeighbourConnectCtxt *ncc = cls; | ||
1148 | |||
1149 | ncc->timeout_task = NULL; | ||
1150 | send_controller_link_response (ncc->client, | ||
1151 | ncc->op_id, | ||
1152 | NULL, | ||
1153 | "Could not connect to delegated controller"); | ||
1154 | cleanup_ncc (ncc); | ||
1155 | } | ||
1156 | |||
1157 | |||
1158 | /** | ||
1159 | * Callback called when a connection to the neighbour is made | ||
1160 | * | ||
1161 | * @param cls the NeighbourConnectCtxt created in GST_handle_link_controllers() | ||
1162 | * @param c the handle the neighbour's controller | ||
1163 | */ | ||
1164 | static void | ||
1165 | neighbour_connect_cb (void *cls, | ||
1166 | struct GNUNET_TESTBED_Controller *c) | ||
1167 | { | ||
1168 | struct NeighbourConnectCtxt *ncc = cls; | ||
1169 | |||
1170 | GNUNET_SCHEDULER_cancel (ncc->timeout_task); | ||
1171 | ncc->timeout_task = NULL; | ||
1172 | ncc->nh = NULL; | ||
1173 | GST_neighbour_release_connection (ncc->n); | ||
1174 | send_controller_link_response (ncc->client, | ||
1175 | ncc->op_id, | ||
1176 | NULL, | ||
1177 | NULL); | ||
1178 | cleanup_ncc (ncc); | ||
1179 | } | ||
1180 | |||
1181 | |||
1182 | /** | ||
1183 | * Function to create a neighbour and add it into the neighbour list | ||
1184 | * | ||
1185 | * @param host the host of the neighbour | ||
1186 | */ | ||
1187 | struct Neighbour * | ||
1188 | GST_create_neighbour (struct GNUNET_TESTBED_Host *host) | ||
1189 | { | ||
1190 | struct Neighbour *n; | ||
1191 | |||
1192 | n = GNUNET_new (struct Neighbour); | ||
1193 | n->host_id = GNUNET_TESTBED_host_get_id_ (host); | ||
1194 | neighbour_list_add (n); /* just add; connect on-demand */ | ||
1195 | return n; | ||
1196 | } | ||
1197 | |||
1198 | |||
1199 | /** | ||
1200 | * Message handler for #GNUNET_MESSAGE_TYPE_TESTBED_LCONTROLLERS message | ||
1201 | * | ||
1202 | * @param cls identification of the client | ||
1203 | * @param msg the actual message | ||
1204 | */ | ||
1205 | void | ||
1206 | handle_link_controllers (void *cls, | ||
1207 | const struct GNUNET_TESTBED_ControllerLinkRequest *msg) | ||
1208 | { | ||
1209 | struct GNUNET_SERVICE_Client *client = cls; | ||
1210 | struct LCFContext *lcf; | ||
1211 | struct Route *route; | ||
1212 | struct Route *new_route; | ||
1213 | uint64_t op_id; | ||
1214 | uint32_t delegated_host_id; | ||
1215 | uint32_t slave_host_id; | ||
1216 | |||
1217 | if (NULL == GST_context) | ||
1218 | { | ||
1219 | GNUNET_break (0); | ||
1220 | GNUNET_SERVICE_client_drop (client); | ||
1221 | return; | ||
1222 | } | ||
1223 | delegated_host_id = ntohl (msg->delegated_host_id); | ||
1224 | if (delegated_host_id == GST_context->host_id) | ||
1225 | { | ||
1226 | GNUNET_break (0); | ||
1227 | LOG (GNUNET_ERROR_TYPE_WARNING, | ||
1228 | "Trying to link ourselves\n"); | ||
1229 | GNUNET_SERVICE_client_drop (client); | ||
1230 | return; | ||
1231 | } | ||
1232 | if ((delegated_host_id >= GST_host_list_size) || | ||
1233 | (NULL == GST_host_list[delegated_host_id])) | ||
1234 | { | ||
1235 | LOG (GNUNET_ERROR_TYPE_WARNING, | ||
1236 | "Delegated host %u not registered with us\n", | ||
1237 | delegated_host_id); | ||
1238 | GNUNET_SERVICE_client_drop (client); | ||
1239 | return; | ||
1240 | } | ||
1241 | slave_host_id = ntohl (msg->slave_host_id); | ||
1242 | if ((slave_host_id >= GST_host_list_size) || | ||
1243 | (NULL == GST_host_list[slave_host_id])) | ||
1244 | { | ||
1245 | LOG (GNUNET_ERROR_TYPE_WARNING, | ||
1246 | "Slave host %u not registered with us\n", | ||
1247 | slave_host_id); | ||
1248 | GNUNET_SERVICE_client_drop (client); | ||
1249 | return; | ||
1250 | } | ||
1251 | if (slave_host_id == delegated_host_id) | ||
1252 | { | ||
1253 | LOG (GNUNET_ERROR_TYPE_WARNING, | ||
1254 | "Slave and delegated host are same\n"); | ||
1255 | GNUNET_SERVICE_client_drop (client); | ||
1256 | return; | ||
1257 | } | ||
1258 | op_id = GNUNET_ntohll (msg->operation_id); | ||
1259 | if (slave_host_id == GST_context->host_id) /* Link from us */ | ||
1260 | { | ||
1261 | struct Slave *slave; | ||
1262 | struct LinkControllersContext *lcc; | ||
1263 | |||
1264 | if (1 != msg->is_subordinate) | ||
1265 | { | ||
1266 | struct Neighbour *n; | ||
1267 | struct NeighbourConnectCtxt *ncc; | ||
1268 | |||
1269 | if ((delegated_host_id < neighbour_list_size) && | ||
1270 | (NULL != neighbour_list[delegated_host_id])) | ||
1271 | { | ||
1272 | GNUNET_break (0); | ||
1273 | GNUNET_SERVICE_client_drop (client); | ||
1274 | return; | ||
1275 | } | ||
1276 | LOG_DEBUG ("Received request to establish a link to host %u\n", | ||
1277 | delegated_host_id); | ||
1278 | n = GST_create_neighbour (GST_host_list[delegated_host_id]); | ||
1279 | ncc = GNUNET_new (struct NeighbourConnectCtxt); | ||
1280 | ncc->n = n; | ||
1281 | ncc->op_id = op_id; | ||
1282 | ncc->client = client; | ||
1283 | ncc->nh = GST_neighbour_get_connection (n, | ||
1284 | &neighbour_connect_cb, | ||
1285 | ncc); | ||
1286 | ncc->timeout_task | ||
1287 | = GNUNET_SCHEDULER_add_delayed (GST_timeout, | ||
1288 | &timeout_neighbour_connect, | ||
1289 | ncc); | ||
1290 | GNUNET_CONTAINER_DLL_insert_tail (ncc_head, | ||
1291 | ncc_tail, | ||
1292 | ncc); | ||
1293 | GNUNET_SERVICE_client_continue (client); | ||
1294 | return; | ||
1295 | } | ||
1296 | if ((delegated_host_id < GST_slave_list_size) && | ||
1297 | (NULL != GST_slave_list[delegated_host_id])) | ||
1298 | { | ||
1299 | GNUNET_break (0); | ||
1300 | GNUNET_SERVICE_client_drop (client); | ||
1301 | return; | ||
1302 | } | ||
1303 | LOG_DEBUG ("Received request to start and establish a link to host %u\n", | ||
1304 | delegated_host_id); | ||
1305 | slave = GNUNET_new (struct Slave); | ||
1306 | slave->host_id = delegated_host_id; | ||
1307 | slave->reghost_map = GNUNET_CONTAINER_multihashmap_create (100, | ||
1308 | GNUNET_NO); | ||
1309 | slave_list_add (slave); | ||
1310 | lcc = GNUNET_new (struct LinkControllersContext); | ||
1311 | lcc->operation_id = op_id; | ||
1312 | lcc->client = client; | ||
1313 | slave->lcc = lcc; | ||
1314 | slave->controller_proc | ||
1315 | = GNUNET_TESTBED_controller_start (GST_context->master_ip, | ||
1316 | GST_host_list[slave->host_id], | ||
1317 | &slave_status_cb, | ||
1318 | slave); | ||
1319 | new_route = GNUNET_new (struct Route); | ||
1320 | new_route->dest = delegated_host_id; | ||
1321 | new_route->thru = GST_context->host_id; | ||
1322 | route_list_add (new_route); | ||
1323 | return; | ||
1324 | } | ||
1325 | |||
1326 | /* Route the request */ | ||
1327 | if (slave_host_id >= route_list_size) | ||
1328 | { | ||
1329 | LOG (GNUNET_ERROR_TYPE_WARNING, | ||
1330 | "No route towards slave host"); | ||
1331 | GNUNET_SERVICE_client_drop (client); | ||
1332 | return; | ||
1333 | } | ||
1334 | lcf = GNUNET_new (struct LCFContext); | ||
1335 | lcf->delegated_host_id = delegated_host_id; | ||
1336 | lcf->slave_host_id = slave_host_id; | ||
1337 | route = GST_find_dest_route (slave_host_id); | ||
1338 | GNUNET_assert (NULL != route); /* because we add routes carefully */ | ||
1339 | GNUNET_assert (route->dest < GST_slave_list_size); | ||
1340 | GNUNET_assert (NULL != GST_slave_list[route->dest]); | ||
1341 | lcf->is_subordinate = msg->is_subordinate; | ||
1342 | lcf->state = INIT; | ||
1343 | lcf->operation_id = op_id; | ||
1344 | lcf->gateway = GST_slave_list[route->dest]; | ||
1345 | lcf->client = client; | ||
1346 | if (NULL == lcf_head) | ||
1347 | { | ||
1348 | GNUNET_assert (NULL == lcf_proc_task_id); | ||
1349 | GNUNET_CONTAINER_DLL_insert_tail (lcf_head, | ||
1350 | lcf_tail, | ||
1351 | lcf); | ||
1352 | lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, | ||
1353 | lcf); | ||
1354 | } | ||
1355 | else | ||
1356 | { | ||
1357 | GNUNET_CONTAINER_DLL_insert_tail (lcf_head, | ||
1358 | lcf_tail, | ||
1359 | lcf); | ||
1360 | } | ||
1361 | /* FIXME: Adding a new route should happen after the controllers are linked | ||
1362 | * successfully */ | ||
1363 | if (1 != msg->is_subordinate) | ||
1364 | { | ||
1365 | GNUNET_SERVICE_client_continue (client); | ||
1366 | return; | ||
1367 | } | ||
1368 | if ((delegated_host_id < route_list_size) && | ||
1369 | (NULL != route_list[delegated_host_id])) | ||
1370 | { | ||
1371 | GNUNET_break_op (0); /* Are you trying to link delegated host twice | ||
1372 | * with is subordinate flag set to GNUNET_YES? */ | ||
1373 | GNUNET_SERVICE_client_drop (client); | ||
1374 | return; | ||
1375 | } | ||
1376 | new_route = GNUNET_new (struct Route); | ||
1377 | new_route->dest = delegated_host_id; | ||
1378 | new_route->thru = route->dest; | ||
1379 | route_list_add (new_route); | ||
1380 | GNUNET_SERVICE_client_continue (client); | ||
1381 | } | ||
1382 | |||
1383 | |||
1384 | /** | ||
1385 | * Clean up @a client handle if we stored any via #handle_link_controllers(), | ||
1386 | * the given client disconnected. | ||
1387 | * | ||
1388 | * @param client the client that is history | ||
1389 | */ | ||
1390 | void | ||
1391 | GST_link_notify_disconnect (struct GNUNET_SERVICE_Client *client) | ||
1392 | { | ||
1393 | struct NeighbourConnectCtxt *ncc; | ||
1394 | struct NeighbourConnectCtxt *nccn; | ||
1395 | struct LCFContext *lcf; | ||
1396 | struct LCFContext *lcfn; | ||
1397 | |||
1398 | for (ncc = ncc_head; NULL != ncc; ncc = nccn) | ||
1399 | { | ||
1400 | nccn = ncc->next; | ||
1401 | if (ncc->client == client) | ||
1402 | cleanup_ncc (ncc); | ||
1403 | } | ||
1404 | for (unsigned int i = 0; i < GST_slave_list_size; i++) | ||
1405 | { | ||
1406 | struct Slave *slave = GST_slave_list[i]; | ||
1407 | struct LinkControllersContext *lcc; | ||
1408 | |||
1409 | if (NULL == slave) | ||
1410 | continue; | ||
1411 | GNUNET_CONTAINER_multihashmap_iterate (slave->reghost_map, | ||
1412 | &drop_client_entries, | ||
1413 | client); | ||
1414 | lcc = slave->lcc; | ||
1415 | if (NULL == lcc) | ||
1416 | continue; | ||
1417 | if (lcc->client == client) | ||
1418 | { | ||
1419 | slave->lcc = NULL; | ||
1420 | GNUNET_free (lcc); | ||
1421 | } | ||
1422 | } | ||
1423 | for (lcf = lcf_head; NULL != lcf; lcf = lcfn) | ||
1424 | { | ||
1425 | lcfn = lcf->next; | ||
1426 | if ((NULL != lcf) && | ||
1427 | (client == lcf->client)) | ||
1428 | { | ||
1429 | if (NULL != lcf->op) | ||
1430 | GNUNET_TESTBED_operation_done (lcf->op); | ||
1431 | GNUNET_CONTAINER_DLL_remove (lcf_head, | ||
1432 | lcf_tail, | ||
1433 | lcf); | ||
1434 | GNUNET_free (lcf); | ||
1435 | } | ||
1436 | } | ||
1437 | } | ||
1438 | |||
1439 | |||
1440 | /** | ||
1441 | * Cleans up the queue used for forwarding link controllers requests | ||
1442 | */ | ||
1443 | void | ||
1444 | GST_free_lcf () | ||
1445 | { | ||
1446 | struct LCFContext *lcf; | ||
1447 | |||
1448 | if (NULL != lcf_head) | ||
1449 | { | ||
1450 | if (NULL != lcf_proc_task_id) | ||
1451 | { | ||
1452 | GNUNET_SCHEDULER_cancel (lcf_proc_task_id); | ||
1453 | lcf_proc_task_id = NULL; | ||
1454 | } | ||
1455 | } | ||
1456 | GNUNET_assert (NULL == lcf_proc_task_id); | ||
1457 | for (lcf = lcf_head; NULL != lcf; lcf = lcf_head) | ||
1458 | { | ||
1459 | if (NULL != lcf->op) | ||
1460 | GNUNET_TESTBED_operation_done (lcf->op); | ||
1461 | if (NULL != lcf->timeout_task) | ||
1462 | GNUNET_SCHEDULER_cancel (lcf->timeout_task); | ||
1463 | GNUNET_CONTAINER_DLL_remove (lcf_head, | ||
1464 | lcf_tail, | ||
1465 | lcf); | ||
1466 | GNUNET_free (lcf); | ||
1467 | } | ||
1468 | } | ||