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-rw-r--r--src/rest-plugins/plugin_rest_namestore.c1103
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diff --git a/src/rest-plugins/plugin_rest_namestore.c b/src/rest-plugins/plugin_rest_namestore.c
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1/*
2 This file is part of GNUnet.
3 Copyright (C) 2012-2015 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/**
19 * @author Martin Schanzenbach
20 * @author Philippe Buschmann
21 * @file namestore/plugin_rest_namestore.c
22 * @brief GNUnet Namestore REST plugin
23 */
24
25#include "platform.h"
26#include "gnunet_rest_plugin.h"
27#include "gnunet_gns_service.h"
28#include "gnunet_namestore_service.h"
29#include "gnunet_identity_service.h"
30#include "gnunet_rest_lib.h"
31#include "gnunet_json_lib.h"
32#include "microhttpd.h"
33#include <jansson.h>
34
35/**
36 * Namestore Namespace
37 */
38#define GNUNET_REST_API_NS_NAMESTORE "/namestore"
39
40/**
41 * Error message Unknown Error
42 */
43#define GNUNET_REST_NAMESTORE_ERROR_UNKNOWN "Unknown Error"
44
45/**
46 * Error message No identity found
47 */
48#define GNUNET_REST_IDENTITY_NOT_FOUND "No identity found"
49
50/**
51 * Error message No default zone specified
52 */
53#define GNUNET_REST_NAMESTORE_NO_DEFAULT_ZONE "No default zone specified"
54
55/**
56 * Error message Failed request
57 */
58#define GNUNET_REST_NAMESTORE_FAILED "Namestore action failed"
59
60/**
61 * Error message invalid data
62 */
63#define GNUNET_REST_NAMESTORE_INVALID_DATA "Data invalid"
64
65/**
66 * Error message No data
67 */
68#define GNUNET_REST_NAMESTORE_NO_DATA "No data"
69
70/**
71 * State while collecting all egos
72 */
73#define ID_REST_STATE_INIT 0
74
75/**
76 * Done collecting egos
77 */
78#define ID_REST_STATE_POST_INIT 1
79/**
80 * The configuration handle
81 */
82const struct GNUNET_CONFIGURATION_Handle *cfg;
83
84/**
85 * HTTP methods allows for this plugin
86 */
87static char* allow_methods;
88
89/**
90 * @brief struct returned by the initialization function of the plugin
91 */
92struct Plugin
93{
94 const struct GNUNET_CONFIGURATION_Handle *cfg;
95};
96
97/**
98 * The default namestore ego
99 */
100struct EgoEntry
101{
102 /**
103 * DLL
104 */
105 struct EgoEntry *next;
106
107 /**
108 * DLL
109 */
110 struct EgoEntry *prev;
111
112 /**
113 * Ego Identifier
114 */
115 char *identifier;
116
117 /**
118 * Public key string
119 */
120 char *keystring;
121
122 /**
123 * The Ego
124 */
125 struct GNUNET_IDENTITY_Ego *ego;
126};
127
128/**
129 * The request handle
130 */
131struct RequestHandle
132{
133 /**
134 * Records to store
135 */
136 char *record_name;
137
138 /**
139 * Records to store
140 */
141 struct GNUNET_GNSRECORD_Data *rd;
142
143 /**
144 * NAMESTORE Operation
145 */
146 struct GNUNET_NAMESTORE_QueueEntry *add_qe;
147
148 /**
149 * Response object
150 */
151 json_t *resp_object;
152
153 /**
154 * The processing state
155 */
156 int state;
157
158 /**
159 * Handle to NAMESTORE
160 */
161 struct GNUNET_NAMESTORE_Handle *ns_handle;
162
163 /**
164 * Handle to NAMESTORE it
165 */
166 struct GNUNET_NAMESTORE_ZoneIterator *list_it;
167
168 /**
169 * Private key for the zone
170 */
171 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_pkey;
172
173 /**
174 * IDENTITY Operation
175 */
176 struct EgoEntry *ego_entry;
177
178 /**
179 * Ego list
180 */
181 struct EgoEntry *ego_head;
182
183 /**
184 * Ego list
185 */
186 struct EgoEntry *ego_tail;
187
188 /**
189 * IDENTITY Operation
190 */
191 struct GNUNET_IDENTITY_Operation *op;
192
193 /**
194 * Handle to Identity service.
195 */
196 struct GNUNET_IDENTITY_Handle *identity_handle;
197
198 /**
199 * Rest connection
200 */
201 struct GNUNET_REST_RequestHandle *rest_handle;
202
203 /**
204 * Desired timeout for the lookup (default is no timeout).
205 */
206 struct GNUNET_TIME_Relative timeout;
207
208 /**
209 * ID of a task associated with the resolution process.
210 */
211 struct GNUNET_SCHEDULER_Task *timeout_task;
212
213 /**
214 * The plugin result processor
215 */
216 GNUNET_REST_ResultProcessor proc;
217
218 /**
219 * The closure of the result processor
220 */
221 void *proc_cls;
222
223 /**
224 * The url
225 */
226 char *url;
227
228 /**
229 * Error response message
230 */
231 char *emsg;
232
233 /**
234 * Response code
235 */
236 int response_code;
237
238};
239
240/**
241 * Cleanup lookup handle
242 * @param handle Handle to clean up
243 */
244static void
245cleanup_handle (void *cls)
246{
247 struct RequestHandle *handle = cls;
248 struct EgoEntry *ego_entry;
249 struct EgoEntry *ego_tmp;
250
251 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
252 "Cleaning up\n");
253 if (NULL != handle->timeout_task)
254 {
255 GNUNET_SCHEDULER_cancel (handle->timeout_task);
256 handle->timeout_task = NULL;
257 }
258 if (NULL != handle->record_name)
259 GNUNET_free(handle->record_name);
260 if (NULL != handle->url)
261 GNUNET_free(handle->url);
262 if (NULL != handle->emsg)
263 GNUNET_free(handle->emsg);
264 if (NULL != handle->rd)
265 {
266 if (NULL != handle->rd->data)
267 GNUNET_free((void*)handle->rd->data);
268 GNUNET_free(handle->rd);
269 }
270 if (NULL != handle->timeout_task)
271 GNUNET_SCHEDULER_cancel(handle->timeout_task);
272 if (NULL != handle->list_it)
273 GNUNET_NAMESTORE_zone_iteration_stop(handle->list_it);
274 if (NULL != handle->add_qe)
275 GNUNET_NAMESTORE_cancel(handle->add_qe);
276 if (NULL != handle->identity_handle)
277 GNUNET_IDENTITY_disconnect(handle->identity_handle);
278 if (NULL != handle->ns_handle)
279 {
280 GNUNET_NAMESTORE_disconnect(handle->ns_handle);
281 }
282
283 for (ego_entry = handle->ego_head;
284 NULL != ego_entry;)
285 {
286 ego_tmp = ego_entry;
287 ego_entry = ego_entry->next;
288 GNUNET_free(ego_tmp->identifier);
289 GNUNET_free(ego_tmp->keystring);
290 GNUNET_free(ego_tmp);
291 }
292
293 if(NULL != handle->resp_object)
294 {
295 json_decref(handle->resp_object);
296 }
297
298 GNUNET_free (handle);
299}
300
301
302/**
303 * Task run on errors. Reports an error and cleans up everything.
304 *
305 * @param cls the `struct RequestHandle`
306 */
307static void
308do_error (void *cls)
309{
310 struct RequestHandle *handle = cls;
311 struct MHD_Response *resp;
312 json_t *json_error = json_object();
313 char *response;
314
315 if (NULL == handle->emsg)
316 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_ERROR_UNKNOWN);
317
318 json_object_set_new(json_error,"error", json_string(handle->emsg));
319
320 if (0 == handle->response_code)
321 handle->response_code = MHD_HTTP_OK;
322 response = json_dumps (json_error, 0);
323 resp = GNUNET_REST_create_response (response);
324 handle->proc (handle->proc_cls, resp, handle->response_code);
325 json_decref(json_error);
326 GNUNET_free(response);
327 GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
328}
329
330
331/**
332 * Get EgoEntry from list with either a public key or a name
333 * If public key and name are not NULL, it returns the public key result first
334 *
335 * @param handle the RequestHandle
336 * @param pubkey the public key of an identity (only one can be NULL)
337 * @param name the name of an identity (only one can be NULL)
338 * @return EgoEntry or NULL if not found
339 */
340struct EgoEntry*
341get_egoentry_namestore(struct RequestHandle *handle, char *name)
342{
343 struct EgoEntry *ego_entry;
344 if (NULL != name)
345 {
346 for (ego_entry = handle->ego_head;
347 NULL != ego_entry;
348 ego_entry = ego_entry->next)
349 {
350 if (0 != strcasecmp (name, ego_entry->identifier))
351 continue;
352 return ego_entry;
353 }
354 }
355 return NULL;
356}
357
358
359/**
360 * Does internal server error when iteration failed.
361 *
362 * @param cls the `struct RequestHandle`
363 */
364static void
365namestore_iteration_error (void *cls)
366{
367 struct RequestHandle *handle = cls;
368 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
369 GNUNET_SCHEDULER_add_now (&do_error, handle);
370 return;
371}
372
373
374/**
375 * Create finished callback
376 *
377 * @param cls the `struct RequestHandle`
378 * @param success the success indicating integer, GNUNET_OK on success
379 * @param emsg the error message (can be NULL)
380 */
381static void
382create_finished (void *cls, int32_t success, const char *emsg)
383{
384 struct RequestHandle *handle = cls;
385 struct MHD_Response *resp;
386
387 handle->add_qe = NULL;
388 if (GNUNET_YES != success)
389 {
390 if (NULL != emsg)
391 {
392 handle->emsg = GNUNET_strdup(emsg);
393 GNUNET_SCHEDULER_add_now (&do_error, handle);
394 return;
395 }
396 handle->emsg = GNUNET_strdup("Error storing records");
397 GNUNET_SCHEDULER_add_now (&do_error, handle);
398 return;
399 }
400 resp = GNUNET_REST_create_response (NULL);
401 handle->proc (handle->proc_cls, resp, MHD_HTTP_NO_CONTENT);
402 GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
403}
404
405
406/**
407 * Delete finished callback
408 *
409 * @param cls the `struct RequestHandle`
410 * @param success the success indicating integer, GNUNET_OK on success
411 * @param emsg the error message (can be NULL)
412 */
413static void
414del_finished (void *cls, int32_t success, const char *emsg)
415{
416 struct RequestHandle *handle = cls;
417
418 handle->add_qe = NULL;
419 if (GNUNET_NO == success)
420 {
421 handle->response_code = MHD_HTTP_NOT_FOUND;
422 handle->emsg = GNUNET_strdup("No record found");
423 GNUNET_SCHEDULER_add_now (&do_error, handle);
424 return;
425 }
426 if (GNUNET_SYSERR == success)
427 {
428 if (NULL != emsg)
429 {
430 handle->emsg = GNUNET_strdup(emsg);
431 GNUNET_SCHEDULER_add_now (&do_error, handle);
432 return;
433 }
434 handle->emsg = GNUNET_strdup("Deleting record failed");
435 GNUNET_SCHEDULER_add_now (&do_error, handle);
436 return;
437 }
438 handle->proc (handle->proc_cls,
439 GNUNET_REST_create_response (NULL),
440 MHD_HTTP_NO_CONTENT);
441 GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
442}
443
444
445/**
446 * Iteration over all results finished, build final
447 * response.
448 *
449 * @param cls the `struct RequestHandle`
450 */
451static void
452namestore_list_finished (void *cls)
453{
454 struct RequestHandle *handle = cls;
455 char *result_str;
456 struct MHD_Response *resp;
457
458 handle->list_it = NULL;
459
460 if (NULL == handle->resp_object)
461 handle->resp_object = json_array();
462
463 result_str = json_dumps (handle->resp_object, 0);
464 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Result %s\n", result_str);
465 resp = GNUNET_REST_create_response (result_str);
466 handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
467 GNUNET_free_non_null (result_str);
468 GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
469}
470
471
472/**
473 * Create a response with requested records
474 *
475 * @param handle the RequestHandle
476 */
477static void
478namestore_list_iteration (void *cls,
479 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key,
480 const char *rname,
481 unsigned int rd_len,
482 const struct GNUNET_GNSRECORD_Data *rd)
483{
484 struct RequestHandle *handle = cls;
485 json_t *record_obj;
486
487 if (NULL == handle->resp_object)
488 handle->resp_object = json_array();
489
490 for (unsigned int i = 0; i < rd_len; i++)
491 {
492 if ( (GNUNET_GNSRECORD_TYPE_NICK == rd[i].record_type) &&
493 (0 != strcmp (rname, GNUNET_GNS_EMPTY_LABEL_AT)) )
494 continue;
495
496 record_obj = GNUNET_JSON_from_gns_record(rname,rd);
497
498 if(NULL == record_obj)
499 continue;
500
501 json_array_append (handle->resp_object, record_obj);
502 json_decref (record_obj);
503 }
504
505 GNUNET_NAMESTORE_zone_iterator_next (handle->list_it, 1);
506}
507
508/**
509 * @param cls closure
510 * @param ego ego handle
511 * @param ctx context for application to store data for this ego
512 * (during the lifetime of this process, initially NULL)
513 * @param identifier identifier assigned by the user for this ego,
514 * NULL if the user just deleted the ego and it
515 * must thus no longer be used
516 */
517static void
518default_ego_get (void *cls,
519 struct GNUNET_IDENTITY_Ego *ego,
520 void **ctx,
521 const char *identifier)
522{
523 struct RequestHandle *handle = cls;
524 handle->op = NULL;
525
526 if (ego == NULL)
527 {
528 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_NO_DEFAULT_ZONE);
529 GNUNET_SCHEDULER_add_now (&do_error, handle);
530 return;
531 }
532 handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key (ego);
533
534 handle->list_it = GNUNET_NAMESTORE_zone_iteration_start (handle->ns_handle,
535 handle->zone_pkey,
536 &namestore_iteration_error,
537 handle,
538 &namestore_list_iteration,
539 handle,
540 &namestore_list_finished,
541 handle);
542 if (NULL == handle->list_it)
543 {
544 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
545 GNUNET_SCHEDULER_add_now (&do_error, handle);
546 return;
547 }
548}
549
550
551/**
552 * Handle namestore GET request
553 *
554 * @param con_handle the connection handle
555 * @param url the url
556 * @param cls the RequestHandle
557 */
558void
559namestore_get (struct GNUNET_REST_RequestHandle *con_handle,
560 const char* url,
561 void *cls)
562{
563 struct RequestHandle *handle = cls;
564 struct EgoEntry *ego_entry;
565 char *egoname;
566
567 egoname = NULL;
568 ego_entry = NULL;
569
570 //set zone to name if given
571 if (strlen (GNUNET_REST_API_NS_NAMESTORE) < strlen (handle->url))
572 {
573 egoname = &handle->url[strlen (GNUNET_REST_API_NS_NAMESTORE)+1];
574 ego_entry = get_egoentry_namestore(handle, egoname);
575
576 if (NULL == ego_entry)
577 {
578 handle->response_code = MHD_HTTP_NOT_FOUND;
579 handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
580 GNUNET_SCHEDULER_add_now (&do_error, handle);
581 return;
582 }
583 }
584 if ( NULL != ego_entry )
585 {
586 handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key(ego_entry->ego);
587 }
588
589 if (NULL == handle->zone_pkey)
590 {
591 handle->op = GNUNET_IDENTITY_get (handle->identity_handle,
592 "namestore",
593 &default_ego_get,
594 handle);
595 return;
596 }
597 handle->list_it = GNUNET_NAMESTORE_zone_iteration_start (handle->ns_handle,
598 handle->zone_pkey,
599 &namestore_iteration_error,
600 handle,
601 &namestore_list_iteration,
602 handle,
603 &namestore_list_finished,
604 handle);
605 if (NULL == handle->list_it)
606 {
607 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
608 GNUNET_SCHEDULER_add_now (&do_error, handle);
609 return;
610 }
611}
612
613
614/**
615 * @param cls closure
616 * @param ego ego handle
617 * @param ctx context for application to store data for this ego
618 * (during the lifetime of this process, initially NULL)
619 * @param identifier identifier assigned by the user for this ego,
620 * NULL if the user just deleted the ego and it
621 * must thus no longer be used
622 */
623static void
624default_ego_post (void *cls,
625 struct GNUNET_IDENTITY_Ego *ego,
626 void **ctx,
627 const char *identifier)
628{
629 struct RequestHandle *handle = cls;
630 handle->op = NULL;
631
632 if (ego == NULL)
633 {
634 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_NO_DEFAULT_ZONE);
635 GNUNET_SCHEDULER_add_now (&do_error, handle);
636 return;
637 }
638 handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key (ego);
639
640 handle->add_qe = GNUNET_NAMESTORE_records_store (handle->ns_handle,
641 handle->zone_pkey,
642 handle->record_name,
643 1,
644 handle->rd,
645 &create_finished,
646 handle);
647 if (NULL == handle->add_qe)
648 {
649 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
650 GNUNET_SCHEDULER_add_now (&do_error, handle);
651 return;
652 }
653}
654
655
656/**
657 * Handle namestore POST request
658 *
659 * @param con_handle the connection handle
660 * @param url the url
661 * @param cls the RequestHandle
662 */
663void
664namestore_add (struct GNUNET_REST_RequestHandle *con_handle,
665 const char* url,
666 void *cls)
667{
668 struct RequestHandle *handle = cls;
669 struct GNUNET_GNSRECORD_Data *gns_record;
670 struct EgoEntry *ego_entry;
671 char *egoname;
672 json_t *data_js;
673 json_t *name_json;
674 json_error_t err;
675 char term_data[handle->rest_handle->data_size + 1];
676
677 struct GNUNET_JSON_Specification gnsspec[] = {
678 GNUNET_JSON_spec_gnsrecord_data(&gns_record),
679 GNUNET_JSON_spec_end ()
680 };
681
682 if (0 >= handle->rest_handle->data_size)
683 {
684 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_NO_DATA);
685 GNUNET_SCHEDULER_add_now (&do_error, handle);
686 return;
687 }
688 term_data[handle->rest_handle->data_size] = '\0';
689 GNUNET_memcpy(term_data, handle->rest_handle->data,
690 handle->rest_handle->data_size);
691 data_js = json_loads (term_data, JSON_DECODE_ANY, &err);
692 if (GNUNET_OK != GNUNET_JSON_parse (data_js, gnsspec, NULL, NULL))
693 {
694 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_INVALID_DATA);
695 GNUNET_SCHEDULER_add_now (&do_error, handle);
696 GNUNET_JSON_parse_free(gnsspec);
697 json_decref (data_js);
698 return;
699 }
700 handle->rd = gns_record;
701
702 name_json = json_object_get(data_js, "record_name");
703 if (!json_is_string(name_json))
704 {
705 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_INVALID_DATA);
706 GNUNET_SCHEDULER_add_now (&do_error, handle);
707 json_decref (data_js);
708 return;
709 }
710 handle->record_name = GNUNET_strdup(json_string_value(name_json));
711 if(NULL == handle->record_name)
712 {
713 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_INVALID_DATA);
714 GNUNET_SCHEDULER_add_now (&do_error, handle);
715 json_decref (data_js);
716 return;
717 }
718 if (0 >= strlen(handle->record_name))
719 {
720 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_INVALID_DATA);
721 GNUNET_SCHEDULER_add_now (&do_error, handle);
722 json_decref (data_js);
723 return;
724 }
725 json_decref (data_js);
726
727 egoname = NULL;
728 ego_entry = NULL;
729
730 //set zone to name if given
731 if (strlen (GNUNET_REST_API_NS_NAMESTORE) < strlen (handle->url))
732 {
733 egoname = &handle->url[strlen (GNUNET_REST_API_NS_NAMESTORE)+1];
734 ego_entry = get_egoentry_namestore(handle, egoname);
735
736 if (NULL == ego_entry)
737 {
738 handle->response_code = MHD_HTTP_NOT_FOUND;
739 handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
740 GNUNET_SCHEDULER_add_now (&do_error, handle);
741 return;
742 }
743 }
744 if (NULL != ego_entry)
745 {
746 handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key(ego_entry->ego);
747 }
748 if (NULL == handle->zone_pkey)
749 {
750 handle->op = GNUNET_IDENTITY_get (handle->identity_handle,
751 "namestore",
752 &default_ego_post,
753 handle);
754 return;
755 }
756 handle->add_qe = GNUNET_NAMESTORE_records_store (handle->ns_handle,
757 handle->zone_pkey,
758 handle->record_name,
759 1,
760 handle->rd,
761 &create_finished,
762 handle);
763 if (NULL == handle->add_qe)
764 {
765 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
766 GNUNET_SCHEDULER_add_now (&do_error, handle);
767 return;
768 }
769}
770
771
772/**
773 * @param cls closure
774 * @param ego ego handle
775 * @param ctx context for application to store data for this ego
776 * (during the lifetime of this process, initially NULL)
777 * @param identifier identifier assigned by the user for this ego,
778 * NULL if the user just deleted the ego and it
779 * must thus no longer be used
780 */
781static void
782default_ego_delete (void *cls,
783 struct GNUNET_IDENTITY_Ego *ego,
784 void **ctx,
785 const char *identifier)
786{
787 struct RequestHandle *handle = cls;
788 handle->op = NULL;
789
790 if (ego == NULL)
791 {
792 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_NO_DEFAULT_ZONE);
793 GNUNET_SCHEDULER_add_now (&do_error, handle);
794 return;
795 }
796 handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key (ego);
797
798 handle->add_qe = GNUNET_NAMESTORE_records_store (handle->ns_handle,
799 handle->zone_pkey,
800 handle->record_name,
801 0,
802 NULL,
803 &del_finished,
804 handle);
805 if (NULL == handle->add_qe)
806 {
807 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
808 GNUNET_SCHEDULER_add_now (&do_error, handle);
809 return;
810 }
811}
812
813
814/**
815 * Handle namestore DELETE request
816 *
817 * @param con_handle the connection handle
818 * @param url the url
819 * @param cls the RequestHandle
820 */
821void
822namestore_delete (struct GNUNET_REST_RequestHandle *con_handle,
823 const char* url,
824 void *cls)
825{
826 struct RequestHandle *handle = cls;
827 struct GNUNET_HashCode key;
828 struct EgoEntry *ego_entry;
829 char *egoname;
830
831 egoname = NULL;
832 ego_entry = NULL;
833
834 //set zone to name if given
835 if (strlen (GNUNET_REST_API_NS_NAMESTORE) < strlen (handle->url))
836 {
837 egoname = &handle->url[strlen (GNUNET_REST_API_NS_NAMESTORE)+1];
838 ego_entry = get_egoentry_namestore(handle, egoname);
839
840 if (NULL == ego_entry)
841 {
842 handle->response_code = MHD_HTTP_NOT_FOUND;
843 handle->emsg = GNUNET_strdup(GNUNET_REST_IDENTITY_NOT_FOUND);
844 GNUNET_SCHEDULER_add_now (&do_error, handle);
845 return;
846 }
847 }
848 if ( NULL != ego_entry )
849 {
850 handle->zone_pkey = GNUNET_IDENTITY_ego_get_private_key(ego_entry->ego);
851 }
852
853 GNUNET_CRYPTO_hash ("record_name", strlen ("record_name"), &key);
854 if ( GNUNET_NO
855 == GNUNET_CONTAINER_multihashmap_contains (con_handle->url_param_map,
856 &key))
857 {
858 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_INVALID_DATA);
859 GNUNET_SCHEDULER_add_now (&do_error, handle);
860 return;
861 }
862 handle->record_name = GNUNET_strdup(
863 GNUNET_CONTAINER_multihashmap_get (con_handle->url_param_map, &key));
864
865 if (NULL == handle->zone_pkey)
866 {
867 handle->op = GNUNET_IDENTITY_get (handle->identity_handle,
868 "namestore",
869 &default_ego_delete,
870 handle);
871 return;
872 }
873
874 handle->add_qe = GNUNET_NAMESTORE_records_store (handle->ns_handle,
875 handle->zone_pkey,
876 handle->record_name,
877 0,
878 NULL,
879 &del_finished,
880 handle);
881 if (NULL == handle->add_qe)
882 {
883 handle->emsg = GNUNET_strdup(GNUNET_REST_NAMESTORE_FAILED);
884 GNUNET_SCHEDULER_add_now (&do_error, handle);
885 return;
886 }
887}
888
889
890
891/**
892 * Respond to OPTIONS request
893 *
894 * @param con_handle the connection handle
895 * @param url the url
896 * @param cls the RequestHandle
897 */
898static void
899options_cont (struct GNUNET_REST_RequestHandle *con_handle,
900 const char* url,
901 void *cls)
902{
903 struct MHD_Response *resp;
904 struct RequestHandle *handle = cls;
905
906 //independent of path return all options
907 resp = GNUNET_REST_create_response (NULL);
908 MHD_add_response_header (resp,
909 "Access-Control-Allow-Methods",
910 allow_methods);
911 handle->proc (handle->proc_cls, resp, MHD_HTTP_OK);
912 GNUNET_SCHEDULER_add_now (&cleanup_handle, handle);
913 return;
914}
915
916
917/**
918 * Handle rest request
919 *
920 * @param handle the request handle
921 */
922static void
923init_cont (struct RequestHandle *handle)
924{
925 struct GNUNET_REST_RequestHandlerError err;
926 static const struct GNUNET_REST_RequestHandler handlers[] = {
927 {MHD_HTTP_METHOD_GET, GNUNET_REST_API_NS_NAMESTORE, &namestore_get},
928 {MHD_HTTP_METHOD_POST, GNUNET_REST_API_NS_NAMESTORE, &namestore_add},
929 {MHD_HTTP_METHOD_DELETE, GNUNET_REST_API_NS_NAMESTORE, &namestore_delete},
930 {MHD_HTTP_METHOD_OPTIONS, GNUNET_REST_API_NS_NAMESTORE, &options_cont},
931 GNUNET_REST_HANDLER_END
932 };
933
934 if (GNUNET_NO == GNUNET_REST_handle_request (handle->rest_handle,
935 handlers,
936 &err,
937 handle))
938 {
939 handle->response_code = err.error_code;
940 GNUNET_SCHEDULER_add_now (&do_error, handle);
941 }
942}
943
944
945/**
946 * This function is initially called for all egos and then again
947 * whenever a ego's identifier changes or if it is deleted. At the
948 * end of the initial pass over all egos, the function is once called
949 * with 'NULL' for 'ego'. That does NOT mean that the callback won't
950 * be invoked in the future or that there was an error.
951 *
952 * When used with 'GNUNET_IDENTITY_create' or 'GNUNET_IDENTITY_get',
953 * this function is only called ONCE, and 'NULL' being passed in
954 * 'ego' does indicate an error (i.e. name is taken or no default
955 * value is known). If 'ego' is non-NULL and if '*ctx'
956 * is set in those callbacks, the value WILL be passed to a subsequent
957 * call to the identity callback of 'GNUNET_IDENTITY_connect' (if
958 * that one was not NULL).
959 *
960 * When an identity is renamed, this function is called with the
961 * (known) ego but the NEW identifier.
962 *
963 * When an identity is deleted, this function is called with the
964 * (known) ego and "NULL" for the 'identifier'. In this case,
965 * the 'ego' is henceforth invalid (and the 'ctx' should also be
966 * cleaned up).
967 *
968 * @param cls closure
969 * @param ego ego handle
970 * @param ctx context for application to store data for this ego
971 * (during the lifetime of this process, initially NULL)
972 * @param name identifier assigned by the user for this ego,
973 * NULL if the user just deleted the ego and it
974 * must thus no longer be used
975 */
976static void
977id_connect_cb (void *cls,
978 struct GNUNET_IDENTITY_Ego *ego,
979 void **ctx,
980 const char *name)
981{
982 struct RequestHandle *handle = cls;
983 struct EgoEntry *ego_entry;
984 struct GNUNET_CRYPTO_EcdsaPublicKey pk;
985
986 if ((NULL == ego) && (ID_REST_STATE_INIT == handle->state))
987 {
988 handle->state = ID_REST_STATE_POST_INIT;
989 init_cont(handle);
990 return;
991 }
992 if (ID_REST_STATE_INIT == handle->state)
993 {
994 ego_entry = GNUNET_new(struct EgoEntry);
995 GNUNET_IDENTITY_ego_get_public_key (ego, &pk);
996 ego_entry->keystring = GNUNET_CRYPTO_ecdsa_public_key_to_string (&pk);
997 ego_entry->ego = ego;
998 GNUNET_asprintf (&ego_entry->identifier, "%s", name);
999 GNUNET_CONTAINER_DLL_insert_tail(handle->ego_head, handle->ego_tail,
1000 ego_entry);
1001 }
1002
1003}
1004
1005
1006/**
1007 * Function processing the REST call
1008 *
1009 * @param method HTTP method
1010 * @param url URL of the HTTP request
1011 * @param data body of the HTTP request (optional)
1012 * @param data_size length of the body
1013 * @param proc callback function for the result
1014 * @param proc_cls closure for callback function
1015 * @return GNUNET_OK if request accepted
1016 */
1017static void
1018rest_process_request(struct GNUNET_REST_RequestHandle *rest_handle,
1019 GNUNET_REST_ResultProcessor proc,
1020 void *proc_cls)
1021{
1022 struct RequestHandle *handle = GNUNET_new (struct RequestHandle);
1023
1024 handle->response_code = 0;
1025 handle->timeout = GNUNET_TIME_UNIT_FOREVER_REL;
1026 handle->proc_cls = proc_cls;
1027 handle->proc = proc;
1028 handle->rest_handle = rest_handle;
1029 handle->zone_pkey = NULL;
1030
1031 handle->url = GNUNET_strdup (rest_handle->url);
1032 if (handle->url[strlen (handle->url)-1] == '/')
1033 handle->url[strlen (handle->url)-1] = '\0';
1034 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Connecting...\n");
1035
1036 handle->ns_handle = GNUNET_NAMESTORE_connect (cfg);
1037 handle->identity_handle = GNUNET_IDENTITY_connect (cfg, &id_connect_cb, handle);
1038 handle->timeout_task =
1039 GNUNET_SCHEDULER_add_delayed (handle->timeout,
1040 &do_error,
1041 handle);
1042
1043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Connected\n");
1044}
1045
1046
1047/**
1048 * Entry point for the plugin.
1049 *
1050 * @param cls Config info
1051 * @return NULL on error, otherwise the plugin context
1052 */
1053void *
1054libgnunet_plugin_rest_namestore_init (void *cls)
1055{
1056 static struct Plugin plugin;
1057 struct GNUNET_REST_Plugin *api;
1058
1059 cfg = cls;
1060 if (NULL != plugin.cfg)
1061 return NULL; /* can only initialize once! */
1062 memset (&plugin, 0, sizeof (struct Plugin));
1063 plugin.cfg = cfg;
1064 api = GNUNET_new (struct GNUNET_REST_Plugin);
1065 api->cls = &plugin;
1066 api->name = GNUNET_REST_API_NS_NAMESTORE;
1067 api->process_request = &rest_process_request;
1068 GNUNET_asprintf (&allow_methods,
1069 "%s, %s, %s, %s, %s",
1070 MHD_HTTP_METHOD_GET,
1071 MHD_HTTP_METHOD_POST,
1072 MHD_HTTP_METHOD_PUT,
1073 MHD_HTTP_METHOD_DELETE,
1074 MHD_HTTP_METHOD_OPTIONS);
1075
1076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1077 _("Namestore REST API initialized\n"));
1078 return api;
1079}
1080
1081
1082/**
1083 * Exit point from the plugin.
1084 *
1085 * @param cls the plugin context (as returned by "init")
1086 * @return always NULL
1087 */
1088void *
1089libgnunet_plugin_rest_namestore_done (void *cls)
1090{
1091 struct GNUNET_REST_Plugin *api = cls;
1092 struct Plugin *plugin = api->cls;
1093 plugin->cfg = NULL;
1094
1095 GNUNET_free_non_null (allow_methods);
1096 GNUNET_free (api);
1097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1098 "Namestore REST plugin is finished\n");
1099 return NULL;
1100}
1101
1102/* end of plugin_rest_namestore.c */
1103
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-25 07:40:58 +0000