2 This file is part of GNUnet.
3 (C) 2009 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file namestore/gnunet-service-namestore.c
23 * @brief namestore for the GNUnet naming system
24 * @author Matthias Wachs
27 #include "gnunet_getopt_lib.h"
28 #include "gnunet_service_lib.h"
29 #include "gnunet_namestore_service.h"
30 #include "gnunet_namestore_plugin.h"
31 #include "gnunet_signatures.h"
32 #include "namestore.h"
37 * A namestore operation.
39 struct GNUNET_NAMESTORE_ZoneIteration
41 struct GNUNET_NAMESTORE_ZoneIteration *next;
42 struct GNUNET_NAMESTORE_ZoneIteration *prev;
44 struct GNUNET_NAMESTORE_Client * client;
57 struct GNUNET_NAMESTORE_Client
59 struct GNUNET_NAMESTORE_Client *next;
60 struct GNUNET_NAMESTORE_Client *prev;
62 struct GNUNET_SERVER_Client * client;
64 struct GNUNET_NAMESTORE_ZoneIteration *op_head;
65 struct GNUNET_NAMESTORE_ZoneIteration *op_tail;
71 * Configuration handle.
73 const struct GNUNET_CONFIGURATION_Handle *GSN_cfg;
75 static struct GNUNET_NAMESTORE_PluginFunctions *GSN_database;
78 * Our notification context.
80 static struct GNUNET_SERVER_NotificationContext *snc;
82 static char *db_lib_name;
84 static struct GNUNET_NAMESTORE_Client *client_head;
85 static struct GNUNET_NAMESTORE_Client *client_tail;
89 * Task run during shutdown.
95 cleanup_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
97 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Stopping namestore service\n");
99 struct GNUNET_NAMESTORE_ZoneIteration * no;
100 struct GNUNET_NAMESTORE_ZoneIteration * tmp;
101 struct GNUNET_NAMESTORE_Client * nc;
102 struct GNUNET_NAMESTORE_Client * next;
104 GNUNET_SERVER_notification_context_destroy (snc);
107 for (nc = client_head; nc != NULL; nc = next)
110 for (no = nc->op_head; no != NULL; no = tmp)
113 GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, no);
117 GNUNET_SERVER_client_drop(nc->client);
118 GNUNET_CONTAINER_DLL_remove (client_head, client_tail, nc);
122 GNUNET_break (NULL == GNUNET_PLUGIN_unload (db_lib_name, GSN_database));
123 GNUNET_free (db_lib_name);
126 static struct GNUNET_NAMESTORE_Client *
127 client_lookup (struct GNUNET_SERVER_Client *client)
129 struct GNUNET_NAMESTORE_Client * nc;
131 GNUNET_assert (NULL != client);
133 for (nc = client_head; nc != NULL; nc = nc->next)
135 if (client == nc->client)
142 * Called whenever a client is disconnected. Frees our
143 * resources associated with that client.
146 * @param client identification of the client
149 client_disconnect_notification (void *cls, struct GNUNET_SERVER_Client *client)
151 struct GNUNET_NAMESTORE_ZoneIteration * no;
152 struct GNUNET_NAMESTORE_Client * nc;
156 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %p disconnected \n", client);
158 nc = client_lookup (client);
160 if ((NULL == client) || (NULL == nc))
163 for (no = nc->op_head; no != NULL; no = no->next)
165 GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, no);
169 GNUNET_SERVER_client_drop(nc->client);
170 GNUNET_CONTAINER_DLL_remove (client_head, client_tail, nc);
176 static void handle_start (void *cls,
177 struct GNUNET_SERVER_Client * client,
178 const struct GNUNET_MessageHeader * message)
180 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %p connected\n", client);
182 struct GNUNET_NAMESTORE_Client * nc = GNUNET_malloc (sizeof (struct GNUNET_NAMESTORE_Client));
184 GNUNET_SERVER_notification_context_add (snc, client);
185 GNUNET_CONTAINER_DLL_insert(client_head, client_tail, nc);
186 GNUNET_SERVER_client_keep (client);
187 GNUNET_SERVER_receive_done (client, GNUNET_OK);
190 struct LookupNameContext
192 struct GNUNET_NAMESTORE_Client *nc;
194 uint32_t record_type;
195 GNUNET_HashCode *zone;
199 void drop_iterator (void *cls,
200 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
201 struct GNUNET_TIME_Absolute expire,
204 const struct GNUNET_NAMESTORE_RecordData *rd,
205 const struct GNUNET_CRYPTO_RsaSignature *signature)
207 GNUNET_HashCode zone_hash;
209 if (NULL != zone_key)
211 GNUNET_CRYPTO_hash(zone_key, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded), &zone_hash);
212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Deleting zone `%s'\n", GNUNET_h2s (&zone_hash));
213 GSN_database->delete_zone (GSN_database->cls, &zone_hash);
217 (*stop) = GNUNET_YES;
223 * Called whenever a client is disconnected. Frees our
224 * resources associated with that client.
227 * @param client identification of the client
229 static void handle_stop (void *cls,
230 struct GNUNET_SERVER_Client * client,
231 const struct GNUNET_MessageHeader * message)
233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_RECORD_REMOVE");
234 struct DisconnectMessage * msg = (struct DisconnectMessage *) message;
235 struct GNUNET_NAMESTORE_ZoneIteration * no;
236 struct GNUNET_NAMESTORE_Client * nc;
239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %p disconnected \n", client);
241 nc = client_lookup (client);
248 for (no = nc->op_head; no != NULL; no = no->next)
250 GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, no);
254 drop = ntohl(msg->drop);
255 if (GNUNET_YES == drop)
257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Dropping namestore content\n");
258 int stop = GNUNET_NO;
260 while (stop == GNUNET_NO)
262 GSN_database->iterate_records (GSN_database->cls, NULL, NULL, offset, &drop_iterator, &stop);
267 GNUNET_SERVER_client_drop(nc->client);
268 GNUNET_CONTAINER_DLL_remove (client_head, client_tail, nc);
273 handle_lookup_name_it (void *cls,
274 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
275 struct GNUNET_TIME_Absolute expire,
277 unsigned int rd_count,
278 const struct GNUNET_NAMESTORE_RecordData *rd,
279 const struct GNUNET_CRYPTO_RsaSignature *signature)
282 struct LookupNameContext *lnc = cls;
283 struct LookupNameResponseMessage *lnr_msg;
285 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key_tmp;
286 struct GNUNET_NAMESTORE_RecordData *rd_selected = NULL;
290 struct GNUNET_CRYPTO_RsaSignature *signature_tmp;
296 name_len = strlen(name) + 1;
298 int copied_elements = 0;
299 int contains_signature = 0;
302 /* count records to copy */
305 if (lnc->record_type != 0)
307 /* special record type needed */
308 for (c = 0; c < rd_count; c ++)
309 if (rd[c].record_type == lnc->record_type)
310 copied_elements++; /* found matching record */
311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found %u records with type %u for name `%s' in zone `%s'\n",
312 copied_elements, lnc->record_type, lnc->name, GNUNET_h2s(lnc->zone));
313 rd_selected = GNUNET_malloc (copied_elements * sizeof (struct GNUNET_NAMESTORE_RecordData));
315 for (c = 0; c < rd_count; c ++)
317 if (rd[c].record_type == lnc->record_type)
319 /* found matching record */
320 memcpy (&rd_selected[copied_elements], &rd[c], sizeof (struct GNUNET_NAMESTORE_RecordData));
327 copied_elements = rd_count;
328 rd_selected = (struct GNUNET_NAMESTORE_RecordData *) rd;
336 expire = GNUNET_TIME_UNIT_ZERO_ABS;
339 rd_ser_len = GNUNET_NAMESTORE_records_get_size(copied_elements, rd_selected);
340 char rd_ser[rd_ser_len];
341 GNUNET_NAMESTORE_records_serialize(copied_elements, rd_selected, rd_ser_len, rd_ser);
343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found %u records for name `%s' in zone `%s'\n",
344 copied_elements, lnc->name, GNUNET_h2s(lnc->zone));
346 if ((copied_elements == rd_count) && (signature != NULL))
347 contains_signature = GNUNET_YES;
349 if (rd_selected != rd)
350 GNUNET_free (rd_selected);
352 r_size = sizeof (struct LookupNameResponseMessage) +
353 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) +
356 contains_signature * sizeof (struct GNUNET_CRYPTO_RsaSignature);
358 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "NAMESTORE_LOOKUP_NAME_RESPONSE");
360 lnr_msg = GNUNET_malloc (r_size);
362 lnr_msg->gns_header.header.type = ntohs (GNUNET_MESSAGE_TYPE_NAMESTORE_LOOKUP_NAME_RESPONSE);
363 lnr_msg->gns_header.header.size = ntohs (r_size);
364 lnr_msg->gns_header.r_id = htonl (lnc->request_id);
365 lnr_msg->rd_count = htons (copied_elements);
366 lnr_msg->rd_len = htons (rd_ser_len);
367 lnr_msg->name_len = htons (name_len);
368 lnr_msg->expire = GNUNET_TIME_absolute_hton(expire);
369 lnr_msg->contains_sig = htons (contains_signature);
371 zone_key_tmp = (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *) &lnr_msg[1];
372 name_tmp = (char *) &zone_key_tmp[1];
373 rd_tmp = &name_tmp[name_len];
374 signature_tmp = (struct GNUNET_CRYPTO_RsaSignature *) &rd_tmp[rd_ser_len];
376 if (zone_key != NULL)
377 memcpy (zone_key_tmp, zone_key, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
380 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded dummy;
381 memset (&dummy, '0', sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
382 memcpy (zone_key_tmp, &dummy, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
384 memcpy (name_tmp, name, name_len);
385 memcpy (rd_tmp, rd_ser, rd_ser_len);
387 if (GNUNET_YES == contains_signature)
388 memcpy (signature_tmp, signature, sizeof (struct GNUNET_CRYPTO_RsaSignature));
389 GNUNET_SERVER_notification_context_unicast (snc, lnc->nc->client, (const struct GNUNET_MessageHeader *) lnr_msg, GNUNET_NO);
391 GNUNET_free (lnr_msg);
394 static void handle_lookup_name (void *cls,
395 struct GNUNET_SERVER_Client * client,
396 const struct GNUNET_MessageHeader * message)
398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_LOOKUP_NAME");
399 struct LookupNameContext lnc;
400 struct GNUNET_NAMESTORE_Client *nc;
407 if (ntohs (message->size) < sizeof (struct LookupNameMessage))
410 GNUNET_SERVER_receive_done (client, GNUNET_OK);
414 nc = client_lookup(client);
418 GNUNET_SERVER_receive_done (client, GNUNET_OK);
422 struct LookupNameMessage * ln_msg = (struct LookupNameMessage *) message;
423 rid = ntohl (ln_msg->gns_header.r_id);
424 name_len = ntohl (ln_msg->name_len);
425 type = ntohl (ln_msg->record_type);
427 if ((name_len == 0) || (name_len > 256))
430 GNUNET_SERVER_receive_done (client, GNUNET_OK);
434 name = (char *) &ln_msg[1];
435 if (name[name_len -1] != '\0')
438 GNUNET_SERVER_receive_done (client, GNUNET_OK);
443 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Looking up all records for name `%s' in zone `%s'\n", name, GNUNET_h2s(&ln_msg->zone));
445 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Looking up records with type %u for name `%s' in zone `%s'\n", type, name, GNUNET_h2s(&ln_msg->zone));
446 /* do the actual lookup */
447 lnc.request_id = rid;
449 lnc.record_type = type;
451 lnc.zone = &ln_msg->zone;
452 res = GSN_database->iterate_records(GSN_database->cls, &ln_msg->zone, name, 0, &handle_lookup_name_it, &lnc);
454 GNUNET_SERVER_receive_done (client, GNUNET_OK);
457 static void handle_record_put (void *cls,
458 struct GNUNET_SERVER_Client * client,
459 const struct GNUNET_MessageHeader * message)
461 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_RECORD_PUT");
462 struct GNUNET_NAMESTORE_Client *nc;
463 struct GNUNET_TIME_Absolute expire;
464 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key;
465 struct GNUNET_CRYPTO_RsaSignature *signature;
466 struct RecordPutResponseMessage rpr_msg;
476 int res = GNUNET_SYSERR;
478 if (ntohs (message->size) < sizeof (struct RecordPutMessage))
481 GNUNET_SERVER_receive_done (client, GNUNET_OK);
485 nc = client_lookup (client);
489 GNUNET_SERVER_receive_done (client, GNUNET_OK);
493 struct RecordPutMessage * rp_msg = (struct RecordPutMessage *) message;
495 rid = ntohl (rp_msg->gns_header.r_id);
496 msg_size = ntohs (rp_msg->gns_header.header.size);
497 key_len = ntohs (rp_msg->key_len);
498 name_len = ntohs (rp_msg->name_len);
499 rd_count = ntohs (rp_msg->rd_count);
500 rd_ser_len = ntohs(rp_msg->rd_len);
502 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
505 GNUNET_SERVER_receive_done (client, GNUNET_OK);
509 if ((rd_count < 1) || (rd_ser_len < 1) || (name_len >=256) || (name_len == 0))
512 GNUNET_SERVER_receive_done (client, GNUNET_OK);
516 msg_size_exp = sizeof (struct RecordPutMessage) + key_len + name_len + rd_ser_len;
517 if (msg_size != msg_size_exp)
519 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Expected message %u size but message size is %u \n", msg_size_exp, msg_size);
521 GNUNET_SERVER_receive_done (client, GNUNET_OK);
524 if ((name_len == 0) || (name_len > 256))
527 GNUNET_SERVER_receive_done (client, GNUNET_OK);
531 zone_key = (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *) &rp_msg[1];
532 name = &((char *)zone_key)[key_len];
534 if (name[name_len -1] != '\0')
537 GNUNET_SERVER_receive_done (client, GNUNET_OK);
541 expire = GNUNET_TIME_absolute_ntoh(rp_msg->expire);
542 signature = (struct GNUNET_CRYPTO_RsaSignature *) &rp_msg->signature;
544 rd_ser = &name[name_len];
545 struct GNUNET_NAMESTORE_RecordData rd[rd_count];
546 res = GNUNET_NAMESTORE_records_deserialize(rd_ser_len, rd_ser, rd_count, rd);
547 if (res != GNUNET_OK)
554 GNUNET_HashCode zone_hash;
555 GNUNET_CRYPTO_hash (zone_key, key_len, &zone_hash);
557 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Putting %u record for name `%s' in zone `%s'\n", rd_count, name, GNUNET_h2s(&zone_hash));
559 /* Database operation */
560 res = GSN_database->put_records(GSN_database->cls,
567 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Putting record for name `%s': %s\n",
568 name, (res == GNUNET_OK) ? "OK" : "FAIL");
572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "RECORD_PUT_RESPONSE");
573 rpr_msg.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_PUT_RESPONSE);
574 rpr_msg.op_id = rp_msg->gns_header.r_id;
575 rpr_msg.header.size = htons (sizeof (struct RecordPutResponseMessage));
576 if (GNUNET_OK == res)
577 rpr_msg.op_result = htons (GNUNET_OK);
579 rpr_msg.op_result = htons (GNUNET_NO);
580 GNUNET_SERVER_notification_context_unicast (snc, nc->client, (const struct GNUNET_MessageHeader *) &rpr_msg, GNUNET_NO);
582 GNUNET_SERVER_receive_done (client, GNUNET_OK);
585 struct CreateRecordContext
587 struct GNUNET_NAMESTORE_RecordData *rd;
588 struct GNUNET_CRYPTO_RsaPrivateKey *pkey;
589 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pubkey;
590 struct GNUNET_TIME_Absolute expire;
597 handle_create_record_it (void *cls,
598 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pubkey,
599 struct GNUNET_TIME_Absolute expire,
601 unsigned int rd_count,
602 const struct GNUNET_NAMESTORE_RecordData *rd,
603 const struct GNUNET_CRYPTO_RsaSignature *signature)
605 struct CreateRecordContext * crc = cls;
606 struct GNUNET_CRYPTO_RsaSignature *signature_new = NULL;
607 struct GNUNET_NAMESTORE_RecordData *rd_new = NULL;
609 int exist = GNUNET_SYSERR;
610 int update = GNUNET_NO;
612 int rd_count_new = 0;
614 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found %u existing records for `%s'\n", rd_count, crc->name);
616 for (c = 0; c < rd_count; c++)
619 if ((crc->rd->record_type == rd[c].record_type) &&
620 (crc->rd->data_size == rd[c].data_size) &&
621 (0 == memcmp (crc->rd->data, rd[c].data, rd[c].data_size)))
623 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found existing records for `%s' to update expiration date!\n", crc->name);
625 if (crc->rd->expiration.abs_value != rd[c].expiration.abs_value)
631 if (exist == GNUNET_SYSERR)
632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "NO existing records for `%s' to update!\n", crc->name);
634 if (exist == GNUNET_SYSERR)
636 rd_new = GNUNET_malloc ((rd_count+1) * sizeof (struct GNUNET_NAMESTORE_RecordData));
637 memcpy (rd_new, rd, rd_count * sizeof (struct GNUNET_NAMESTORE_RecordData));
638 rd_count_new = rd_count + 1;
639 rd_new[rd_count] = *(crc->rd);
640 signature_new = GNUNET_NAMESTORE_create_signature (crc->pkey, crc->name, rd_new, rd_count+1);
642 if (NULL == signature_new)
649 else if (update == GNUNET_NO)
651 /* Exact same record already exists */
652 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No update for %s' record required!\n", crc->name);
656 else if (update == GNUNET_YES)
659 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Updating existing records for `%s'!\n", crc->name);
660 rd_new = GNUNET_malloc ((rd_count) * sizeof (struct GNUNET_NAMESTORE_RecordData));
661 memcpy (rd_new, rd, rd_count * sizeof (struct GNUNET_NAMESTORE_RecordData));
662 rd_count_new = rd_count;
663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Updating expiration from %llu to %llu!\n", rd_new[exist].expiration.abs_value, crc->rd->expiration.abs_value);
664 rd_new[exist].expiration = crc->rd->expiration;
665 signature_new = GNUNET_NAMESTORE_create_signature (crc->pkey, crc->name, rd_new, rd_count_new);
666 if (NULL == signature_new)
674 /* Database operation */
675 GNUNET_assert ((rd_new != NULL) && (rd_count_new > 0));
676 res = GSN_database->put_records(GSN_database->cls,
677 (const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *) crc->pubkey,
680 rd_count_new, rd_new,
682 GNUNET_break (GNUNET_OK == res);
686 GNUNET_free_non_null (rd_new);
687 GNUNET_free_non_null (signature_new);
691 /* failed to create the record */
692 crc->res = GNUNET_SYSERR;
695 /* database operations OK */
696 if (GNUNET_YES == update)
697 /* we updated an existing record */
698 crc->res = GNUNET_NO;
700 /* we created a new record */
701 crc->res = GNUNET_YES;
704 /* identical entry existed, so we did nothing */
705 crc->res = GNUNET_NO;
711 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Update result for name `%s' %u\n", crc->name, res);
715 static void handle_record_create (void *cls,
716 struct GNUNET_SERVER_Client * client,
717 const struct GNUNET_MessageHeader * message)
719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_RECORD_CREATE");
720 struct GNUNET_NAMESTORE_Client *nc;
721 struct CreateRecordContext crc;
722 struct GNUNET_CRYPTO_RsaPrivateKey *pkey;
723 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pub;
724 struct RecordCreateResponseMessage rcr_msg;
725 GNUNET_HashCode pubkey_hash;
737 int res = GNUNET_SYSERR;
739 if (ntohs (message->size) < sizeof (struct RecordCreateMessage))
742 GNUNET_SERVER_receive_done (client, GNUNET_OK);
746 nc = client_lookup(client);
750 GNUNET_SERVER_receive_done (client, GNUNET_OK);
754 struct RecordCreateMessage * rp_msg = (struct RecordCreateMessage *) message;
755 rid = ntohl (rp_msg->gns_header.r_id);
756 name_len = ntohs (rp_msg->name_len);
757 msg_size = ntohs (message->size);
758 rd_count = ntohs (rp_msg->rd_count);
759 rd_ser_len = ntohs (rp_msg->rd_len);
760 key_len = ntohs (rp_msg->pkey_len);
761 msg_size_exp = sizeof (struct RecordCreateMessage) + key_len + name_len + rd_ser_len;
763 if (msg_size != msg_size_exp)
765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Expected message %u size but message size is %u \n", msg_size_exp, msg_size);
767 GNUNET_SERVER_receive_done (client, GNUNET_OK);
771 if ((name_len == 0) || (name_len > 256))
774 GNUNET_SERVER_receive_done (client, GNUNET_OK);
778 pkey_tmp = (char *) &rp_msg[1];
779 name_tmp = &pkey_tmp[key_len];
780 rd_ser = &name_tmp[name_len];
782 if (name_tmp[name_len -1] != '\0')
785 GNUNET_SERVER_receive_done (client, GNUNET_OK);
789 struct GNUNET_NAMESTORE_RecordData rd[rd_count];
790 res = GNUNET_NAMESTORE_records_deserialize(rd_ser_len, rd_ser, rd_count, rd);
791 if ((res != GNUNET_OK) || (rd_count != 1))
797 /* Extracting and converting private key */
798 pkey = GNUNET_CRYPTO_rsa_decode_key((char *) pkey_tmp, key_len);
799 GNUNET_assert (pkey != NULL);
800 GNUNET_CRYPTO_rsa_key_get_public(pkey, &pub);
801 GNUNET_CRYPTO_hash (&pub, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded), &pubkey_hash);
808 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Creating record for name `%s' in zone `%s'\n", name_tmp, GNUNET_h2s(&pubkey_hash));
810 /* Get existing records for name */
811 res = GSN_database->iterate_records(GSN_database->cls, &pubkey_hash, name_tmp, 0, &handle_create_record_it, &crc);
812 if (res != GNUNET_SYSERR)
814 GNUNET_CRYPTO_rsa_key_free(pkey);
818 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "RECORD_CREATE_RESPONSE");
819 rcr_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_CREATE_RESPONSE);
820 rcr_msg.gns_header.r_id = htonl (rid);
821 rcr_msg.gns_header.header.size = htons (sizeof (struct RecordCreateResponseMessage));
822 if ((GNUNET_OK == res) && (crc.res == GNUNET_YES))
823 rcr_msg.op_result = htons (GNUNET_YES);
824 else if ((GNUNET_OK == res) && (crc.res == GNUNET_NO))
825 rcr_msg.op_result = htons (GNUNET_NO);
827 rcr_msg.op_result = htons (GNUNET_SYSERR);
828 GNUNET_SERVER_notification_context_unicast (snc, nc->client, (const struct GNUNET_MessageHeader *) &rcr_msg, GNUNET_NO);
830 GNUNET_SERVER_receive_done (client, GNUNET_OK);
834 struct RemoveRecordContext
836 struct GNUNET_NAMESTORE_RecordData *rd;
837 struct GNUNET_CRYPTO_RsaPrivateKey *pkey;
842 handle_record_remove_it (void *cls,
843 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
844 struct GNUNET_TIME_Absolute expire,
846 unsigned int rd_count,
847 const struct GNUNET_NAMESTORE_RecordData *rd,
848 const struct GNUNET_CRYPTO_RsaSignature *signature)
850 struct RemoveRecordContext *rrc = cls;
851 unsigned int rd_count_new = rd_count -1;
852 struct GNUNET_NAMESTORE_RecordData rd_new[rd_count_new];
855 int found = GNUNET_NO;
857 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Name `%s 'currently has %u records\n", name, rd_count);
861 /* Could not find record to remove */
866 /* Find record to remove */
868 for (c = 0; c < rd_count; c++)
870 if ((rd[c].expiration.abs_value == rrc->rd->expiration.abs_value) &&
871 (rd[c].flags == rrc->rd->flags) &&
872 (rd[c].record_type == rrc->rd->record_type) &&
873 (rd[c].data_size == rrc->rd->data_size) &&
874 (0 == memcmp (rd[c].data, rrc->rd->data, rrc->rd->data_size)))
876 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found record to remove!\n", rd_count);
886 if ((c2 != rd_count_new) || (found == GNUNET_NO))
888 /* Could not find record to remove */
892 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Name `%s' now has %u records\n", name, rd_count_new);
894 /* Create new signature */
895 struct GNUNET_CRYPTO_RsaSignature * new_signature;
896 new_signature = GNUNET_NAMESTORE_create_signature (rrc->pkey, name, rd_new, rd_count_new);
898 if (new_signature == NULL)
900 /* Signature failed */
906 res = GSN_database->put_records(GSN_database->cls,
910 rd_count_new, rd_new,
912 GNUNET_free (new_signature);
914 if (GNUNET_OK != res)
916 /* Could put records into database */
924 static void handle_record_remove (void *cls,
925 struct GNUNET_SERVER_Client * client,
926 const struct GNUNET_MessageHeader * message)
928 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_RECORD_REMOVE");
929 struct GNUNET_NAMESTORE_Client *nc;
930 struct RecordRemoveResponseMessage rrr_msg;
931 struct GNUNET_CRYPTO_RsaPrivateKey *pkey;
932 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pub;
933 GNUNET_HashCode pubkey_hash;
934 char * pkey_tmp = NULL;
935 char * name_tmp = NULL;
936 char * rd_ser = NULL;
939 size_t rd_ser_len = 0;
941 size_t msg_size_exp = 0;
945 int res = GNUNET_SYSERR;
947 if (ntohs (message->size) < sizeof (struct RecordRemoveMessage))
950 GNUNET_SERVER_receive_done (client, GNUNET_OK);
954 nc = client_lookup(client);
958 GNUNET_SERVER_receive_done (client, GNUNET_OK);
962 struct RecordRemoveMessage * rr_msg = (struct RecordRemoveMessage *) message;
963 rid = ntohl (rr_msg->gns_header.r_id);
964 name_len = ntohs (rr_msg->name_len);
965 rd_ser_len = ntohs (rr_msg->rd_len);
966 rd_count = ntohs (rr_msg->rd_count);
967 key_len = ntohs (rr_msg->key_len);
968 msg_size = ntohs (message->size);
970 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
973 GNUNET_SERVER_receive_done (client, GNUNET_OK);
977 if ((rd_count != 1) || (rd_ser_len < 1) || (name_len >=256) || (name_len == 0))
980 GNUNET_SERVER_receive_done (client, GNUNET_OK);
984 msg_size_exp = sizeof (struct RecordRemoveMessage) + key_len + name_len + rd_ser_len;
985 if (msg_size != msg_size_exp)
987 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Expected message %u size but message size is %u \n", msg_size_exp, msg_size);
989 GNUNET_SERVER_receive_done (client, GNUNET_OK);
993 if ((rd_count != 1) || (rd_ser_len < 1) || (name_len >=256) || (name_len == 0))
996 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1000 pkey_tmp = (char *) &rr_msg[1];
1001 name_tmp = &pkey_tmp[key_len];
1002 rd_ser = &name_tmp[name_len];
1005 if ((name_len == 0) || (name_len > 256))
1007 GNUNET_break_op (0);
1008 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1012 if (name_tmp[name_len -1] != '\0')
1014 GNUNET_break_op (0);
1015 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1019 /* Extracting and converting private key */
1020 pkey = GNUNET_CRYPTO_rsa_decode_key((char *) pkey_tmp, key_len);
1021 GNUNET_assert (pkey != NULL);
1022 GNUNET_CRYPTO_rsa_key_get_public(pkey, &pub);
1023 GNUNET_CRYPTO_hash (&pub, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded), &pubkey_hash);
1025 struct GNUNET_NAMESTORE_RecordData rd[rd_count];
1026 res = GNUNET_NAMESTORE_records_deserialize(rd_ser_len, rd_ser, rd_count, rd);
1027 if ((res != GNUNET_OK) || (rd_count != 1))
1029 GNUNET_break_op (0);
1033 struct RemoveRecordContext rrc;
1037 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Removing record for name `%s' in zone `%s'\n", name_tmp, GNUNET_h2s(&pubkey_hash));
1039 /* Database operation */
1040 res = GSN_database->iterate_records (GSN_database->cls,
1044 handle_record_remove_it, &rrc);
1046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Removing record for name `%s': %s\n",
1047 name_tmp, (rrc.op_res == 0) ? "OK" : "FAIL");
1052 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "RECORD_REMOVE_RESPONSE");
1053 rrr_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_REMOVE_RESPONSE);
1054 rrr_msg.gns_header.r_id = rr_msg->gns_header.r_id;
1055 rrr_msg.gns_header.header.size = htons (sizeof (struct RecordRemoveResponseMessage));
1056 rrr_msg.op_result = htons (res);
1057 GNUNET_SERVER_notification_context_unicast (snc, nc->client, (const struct GNUNET_MessageHeader *) &rrr_msg, GNUNET_NO);
1059 GNUNET_CRYPTO_rsa_key_free (pkey);
1061 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1064 struct ZoneIterationProcResult
1067 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded zone_key;
1070 struct GNUNET_CRYPTO_RsaSignature signature;
1071 struct GNUNET_TIME_Absolute expire;
1081 void zone_iteration_proc (void *cls,
1082 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
1083 struct GNUNET_TIME_Absolute expire,
1085 unsigned int rd_count,
1086 const struct GNUNET_NAMESTORE_RecordData *rd,
1087 const struct GNUNET_CRYPTO_RsaSignature *signature)
1089 struct ZoneIterationProcResult *zipr = cls;
1091 if (zone_key != NULL)
1093 zipr->zone_key = *zone_key;
1094 zipr->have_zone_key = GNUNET_YES;
1097 zipr->have_zone_key = GNUNET_NO;
1099 zipr->expire = expire;
1103 memcpy (zipr->name, name, strlen(name) + 1);
1104 zipr->have_name = GNUNET_YES;
1107 zipr->have_name = GNUNET_NO;
1109 if (signature != NULL)
1111 zipr->signature = *signature;
1112 zipr->have_signature = GNUNET_YES;
1115 zipr->have_signature = GNUNET_NO;
1117 if ((rd_count > 0) && (rd != NULL))
1119 len = GNUNET_NAMESTORE_records_get_size(rd_count, rd);
1120 zipr->rd_ser = GNUNET_malloc (len);
1121 GNUNET_NAMESTORE_records_serialize(rd_count, rd, len, zipr->rd_ser);
1122 zipr->rd_ser_len = len;
1126 static void handle_iteration_start (void *cls,
1127 struct GNUNET_SERVER_Client * client,
1128 const struct GNUNET_MessageHeader * message)
1130 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ZONE_ITERATION_START");
1132 struct ZoneIterationStartMessage * zis_msg = (struct ZoneIterationStartMessage *) message;
1133 struct GNUNET_NAMESTORE_Client *nc;
1134 struct GNUNET_NAMESTORE_ZoneIteration *zi;
1135 struct ZoneIterationResponseMessage zir_msg;
1136 struct ZoneIterationProcResult zipr;
1139 nc = client_lookup(client);
1142 GNUNET_break_op (0);
1143 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1147 zi = GNUNET_malloc (sizeof (struct GNUNET_NAMESTORE_ZoneIteration));
1148 zi->request_id = ntohl (zis_msg->gns_header.r_id);
1151 zi->zone = zis_msg->zone;
1153 GNUNET_CONTAINER_DLL_insert (nc->op_head, nc->op_tail, zi);
1155 res = GSN_database->iterate_records (GSN_database->cls, &zis_msg->zone, NULL, zi->offset , &zone_iteration_proc, &zipr);
1158 /* GNUNET_OK on success */
1162 /* GNUNET_SYSERR on error */
1165 /* GNUNET_NO if there were no results, */
1173 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "ZONE_ITERATION_RESPONSE");
1174 zir_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_RESPONSE);
1175 zir_msg.gns_header.r_id = htonl(zi->request_id);
1176 zir_msg.gns_header.header.size = htons (sizeof (struct ZoneIterationResponseMessage));
1179 GNUNET_SERVER_notification_context_unicast (snc, zi->client->client, (const struct GNUNET_MessageHeader *) &zir_msg, GNUNET_NO);
1182 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1185 static void handle_iteration_stop (void *cls,
1186 struct GNUNET_SERVER_Client * client,
1187 const struct GNUNET_MessageHeader * message)
1189 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ZONE_ITERATION_STOP");
1191 struct GNUNET_NAMESTORE_Client *nc;
1192 struct GNUNET_NAMESTORE_ZoneIteration *zi;
1193 struct ZoneIterationStopMessage * zis_msg = (struct ZoneIterationStopMessage *) message;
1196 nc = client_lookup(client);
1199 GNUNET_break_op (0);
1200 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1204 rid = ntohl (zis_msg->gns_header.r_id);
1205 for (zi = nc->op_head; zi != NULL; zi = zi->next)
1207 if (zi->request_id == rid)
1212 GNUNET_break_op (0);
1213 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1217 GNUNET_CONTAINER_DLL_remove(nc->op_head, nc->op_tail, zi);
1218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Stopped zone iteration for zone `%s'\n", GNUNET_h2s (&zi->zone));
1221 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1224 static void handle_iteration_next (void *cls,
1225 struct GNUNET_SERVER_Client * client,
1226 const struct GNUNET_MessageHeader * message)
1228 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ZONE_ITERATION_NEXT");
1230 struct GNUNET_NAMESTORE_Client *nc;
1231 struct GNUNET_NAMESTORE_ZoneIteration *zi;
1232 struct ZoneIterationStopMessage * zis_msg = (struct ZoneIterationStopMessage *) message;
1236 nc = client_lookup(client);
1239 GNUNET_break_op (0);
1240 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1244 rid = ntohl (zis_msg->gns_header.r_id);
1245 for (zi = nc->op_head; zi != NULL; zi = zi->next)
1247 if (zi->request_id == rid)
1252 GNUNET_break_op (0);
1253 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1258 res = GSN_database->iterate_records (GSN_database->cls, &zi->zone, NULL, zi->offset , &zone_iteration_proc, zi);
1264 * Process template requests.
1266 * @param cls closure
1267 * @param server the initialized server
1268 * @param cfg configuration to use
1271 run (void *cls, struct GNUNET_SERVER_Handle *server,
1272 const struct GNUNET_CONFIGURATION_Handle *cfg)
1276 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting namestore service\n");
1278 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1279 {&handle_start, NULL,
1280 GNUNET_MESSAGE_TYPE_NAMESTORE_START, sizeof (struct StartMessage)},
1281 {&handle_stop, NULL,
1282 GNUNET_MESSAGE_TYPE_NAMESTORE_DISCONNECT, sizeof (struct DisconnectMessage)},
1283 {&handle_lookup_name, NULL,
1284 GNUNET_MESSAGE_TYPE_NAMESTORE_LOOKUP_NAME, 0},
1285 {&handle_record_put, NULL,
1286 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_PUT, 0},
1287 {&handle_record_create, NULL,
1288 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_CREATE, 0},
1289 {&handle_record_remove, NULL,
1290 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_REMOVE, 0},
1291 {&handle_iteration_start, NULL,
1292 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START, sizeof (struct ZoneIterationStartMessage)},
1293 {&handle_iteration_stop, NULL,
1294 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP, sizeof (struct ZoneIterationStopMessage)},
1295 {&handle_iteration_next, NULL,
1296 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT, 0},
1302 /* Loading database plugin */
1304 GNUNET_CONFIGURATION_get_value_string (cfg, "namestore", "database",
1306 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "No database backend configured\n");
1308 GNUNET_asprintf (&db_lib_name, "libgnunet_plugin_namestore_%s", database);
1309 GSN_database = GNUNET_PLUGIN_load (db_lib_name, (void *) GSN_cfg);
1310 if (GSN_database == NULL)
1311 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Could not load database backend `%s'\n",
1313 GNUNET_free (database);
1315 /* Configuring server handles */
1316 GNUNET_SERVER_add_handlers (server, handlers);
1317 snc = GNUNET_SERVER_notification_context_create (server, 16);
1318 GNUNET_SERVER_disconnect_notify (server,
1319 &client_disconnect_notification,
1322 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &cleanup_task,
1329 * The main function for the template service.
1331 * @param argc number of arguments from the command line
1332 * @param argv command line arguments
1333 * @return 0 ok, 1 on error
1336 main (int argc, char *const *argv)
1338 return (GNUNET_OK ==
1339 GNUNET_SERVICE_run (argc, argv, "namestore",
1340 GNUNET_SERVICE_OPTION_NONE, &run, NULL)) ? 0 : 1;
1343 /* end of gnunet-service-namestore.c */