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;
218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "NULL \n");
224 * Called whenever a client is disconnected. Frees our
225 * resources associated with that client.
228 * @param client identification of the client
230 static void handle_stop (void *cls,
231 struct GNUNET_SERVER_Client * client,
232 const struct GNUNET_MessageHeader * message)
234 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_RECORD_REMOVE");
235 struct DisconnectMessage * msg = (struct DisconnectMessage *) message;
236 struct GNUNET_NAMESTORE_ZoneIteration * no;
237 struct GNUNET_NAMESTORE_Client * nc;
240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %p disconnected \n", client);
242 nc = client_lookup (client);
249 for (no = nc->op_head; no != NULL; no = no->next)
251 GNUNET_CONTAINER_DLL_remove (nc->op_head, nc->op_tail, no);
255 drop = ntohl(msg->drop);
256 if (GNUNET_YES == drop)
258 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Dropping namestore content\n");
259 int stop = GNUNET_NO;
261 while (stop == GNUNET_NO)
263 GSN_database->iterate_records (GSN_database->cls, NULL, NULL, offset, &drop_iterator, &stop);
264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "STOP %u \n");
269 GNUNET_SERVER_client_drop(nc->client);
270 GNUNET_CONTAINER_DLL_remove (client_head, client_tail, nc);
275 handle_lookup_name_it (void *cls,
276 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
277 struct GNUNET_TIME_Absolute expire,
279 unsigned int rd_count,
280 const struct GNUNET_NAMESTORE_RecordData *rd,
281 const struct GNUNET_CRYPTO_RsaSignature *signature)
284 struct LookupNameContext *lnc = cls;
285 struct LookupNameResponseMessage *lnr_msg;
287 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key_tmp;
288 struct GNUNET_NAMESTORE_RecordData *rd_selected = NULL;
292 struct GNUNET_CRYPTO_RsaSignature *signature_tmp;
300 name_len = strlen(name) + 1;
302 int copied_elements = 0;
303 int contains_signature = 0;
306 /* count records to copy */
309 if (lnc->record_type != 0)
311 /* special record type needed */
312 for (c = 0; c < rd_count; c ++)
313 if (rd[c].record_type == lnc->record_type)
314 copied_elements++; /* found matching record */
315 rd_selected = GNUNET_malloc (copied_elements * sizeof (struct GNUNET_NAMESTORE_RecordData));
317 for (c = 0; c < rd_count; c ++)
319 if (rd[c].record_type == lnc->record_type)
321 /* found matching record */
322 memcpy (&rd_selected[copied_elements], &rd[c], sizeof (struct GNUNET_NAMESTORE_RecordData));
329 copied_elements = rd_count;
330 rd_selected = (struct GNUNET_NAMESTORE_RecordData *) rd;
338 expire = GNUNET_TIME_UNIT_ZERO_ABS;
343 rd_ser_len = GNUNET_NAMESTORE_records_get_size(copied_elements, rd_selected);
344 char rd_ser[rd_ser_len];
345 GNUNET_NAMESTORE_records_serialize(copied_elements, rd_selected, rd_ser_len, rd_ser);
347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found %u records for name `%s' in zone `%s'\n",
348 copied_elements, lnc->name, GNUNET_h2s(lnc->zone));
350 if ((copied_elements == rd_count) && (signature != NULL))
351 contains_signature = GNUNET_YES;
353 if (rd_selected != rd)
354 GNUNET_free (rd_selected);
356 r_size = sizeof (struct LookupNameResponseMessage) +
357 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) +
360 contains_signature * sizeof (struct GNUNET_CRYPTO_RsaSignature);
362 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "NAMESTORE_LOOKUP_NAME_RESPONSE");
364 lnr_msg = GNUNET_malloc (r_size);
366 lnr_msg->gns_header.header.type = ntohs (GNUNET_MESSAGE_TYPE_NAMESTORE_LOOKUP_NAME_RESPONSE);
367 lnr_msg->gns_header.header.size = ntohs (r_size);
368 lnr_msg->gns_header.r_id = htonl (lnc->request_id);
369 lnr_msg->rd_count = htons (rd_count);
370 lnr_msg->rd_len = htons (rd_ser_len);
371 lnr_msg->name_len = htons (name_len);
372 lnr_msg->expire = GNUNET_TIME_absolute_hton(expire);
373 lnr_msg->contains_sig = htons (contains_signature);
375 zone_key_tmp = (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *) &lnr_msg[1];
376 name_tmp = (char *) &zone_key_tmp[1];
377 rd_tmp = &name_tmp[name_len];
378 signature_tmp = (struct GNUNET_CRYPTO_RsaSignature *) &rd_tmp[rd_ser_len];
380 if (zone_key != NULL)
381 memcpy (zone_key_tmp, zone_key, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
384 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded dummy;
385 memset (&dummy, '0', sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
386 memcpy (zone_key_tmp, &dummy, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
388 memcpy (name_tmp, name, name_len);
389 memcpy (rd_tmp, rd_ser, rd_ser_len);
391 if (GNUNET_YES == contains_signature)
392 memcpy (signature_tmp, signature, sizeof (struct GNUNET_CRYPTO_RsaSignature));
393 GNUNET_SERVER_notification_context_unicast (snc, lnc->nc->client, (const struct GNUNET_MessageHeader *) lnr_msg, GNUNET_NO);
395 GNUNET_free (lnr_msg);
398 static void handle_lookup_name (void *cls,
399 struct GNUNET_SERVER_Client * client,
400 const struct GNUNET_MessageHeader * message)
402 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_LOOKUP_NAME");
403 struct LookupNameContext lnc;
404 struct GNUNET_NAMESTORE_Client *nc;
411 if (ntohs (message->size) < sizeof (struct LookupNameMessage))
414 GNUNET_SERVER_receive_done (client, GNUNET_OK);
418 nc = client_lookup(client);
422 GNUNET_SERVER_receive_done (client, GNUNET_OK);
426 struct LookupNameMessage * ln_msg = (struct LookupNameMessage *) message;
427 rid = ntohl (ln_msg->gns_header.r_id);
428 name_len = ntohl (ln_msg->name_len);
429 type = ntohl (ln_msg->record_type);
431 if ((name_len == 0) || (name_len > 256))
434 GNUNET_SERVER_receive_done (client, GNUNET_OK);
438 name = (char *) &ln_msg[1];
439 if (name[name_len -1] != '\0')
442 GNUNET_SERVER_receive_done (client, GNUNET_OK);
446 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Looking up record for name `%s' in zone `%s'\n", name, GNUNET_h2s(&ln_msg->zone));
448 /* do the actual lookup */
449 lnc.request_id = rid;
451 lnc.record_type = type;
453 lnc.zone = &ln_msg->zone;
454 res = GSN_database->iterate_records(GSN_database->cls, &ln_msg->zone, name, 0, &handle_lookup_name_it, &lnc);
456 GNUNET_SERVER_receive_done (client, GNUNET_OK);
459 static void handle_record_put (void *cls,
460 struct GNUNET_SERVER_Client * client,
461 const struct GNUNET_MessageHeader * message)
463 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_RECORD_PUT");
464 struct GNUNET_NAMESTORE_Client *nc;
465 struct GNUNET_TIME_Absolute expire;
466 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key;
467 struct GNUNET_CRYPTO_RsaSignature *signature;
468 struct RecordPutResponseMessage rpr_msg;
478 int res = GNUNET_SYSERR;
480 if (ntohs (message->size) < sizeof (struct RecordPutMessage))
483 GNUNET_SERVER_receive_done (client, GNUNET_OK);
487 nc = client_lookup (client);
491 GNUNET_SERVER_receive_done (client, GNUNET_OK);
495 struct RecordPutMessage * rp_msg = (struct RecordPutMessage *) message;
497 rid = ntohl (rp_msg->gns_header.r_id);
498 msg_size = ntohs (rp_msg->gns_header.header.size);
499 key_len = ntohs (rp_msg->key_len);
500 name_len = ntohs (rp_msg->name_len);
501 rd_count = ntohs (rp_msg->rd_count);
502 rd_ser_len = ntohs(rp_msg->rd_len);
504 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
507 GNUNET_SERVER_receive_done (client, GNUNET_OK);
511 if ((rd_count < 1) || (rd_ser_len < 1) || (name_len >=256) || (name_len == 0))
514 GNUNET_SERVER_receive_done (client, GNUNET_OK);
518 msg_size_exp = sizeof (struct RecordPutMessage) + key_len + name_len + rd_ser_len;
519 if (msg_size != msg_size_exp)
521 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Expected message %u size but message size is %u \n", msg_size_exp, msg_size);
523 GNUNET_SERVER_receive_done (client, GNUNET_OK);
526 if ((name_len == 0) || (name_len > 256))
529 GNUNET_SERVER_receive_done (client, GNUNET_OK);
533 zone_key = (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *) &rp_msg[1];
534 name = &((char *)zone_key)[key_len];
536 if (name[name_len -1] != '\0')
539 GNUNET_SERVER_receive_done (client, GNUNET_OK);
543 expire = GNUNET_TIME_absolute_ntoh(rp_msg->expire);
544 signature = (struct GNUNET_CRYPTO_RsaSignature *) &rp_msg->signature;
546 rd_ser = &name[name_len];
547 struct GNUNET_NAMESTORE_RecordData rd[rd_count];
548 res = GNUNET_NAMESTORE_records_deserialize(rd_ser_len, rd_ser, rd_count, rd);
549 if (res != GNUNET_OK)
556 GNUNET_HashCode zone_hash;
557 GNUNET_CRYPTO_hash (zone_key, key_len, &zone_hash);
559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Putting %u record for name `%s' in zone `%s'\n", rd_count, name, GNUNET_h2s(&zone_hash));
561 /* Database operation */
562 res = GSN_database->put_records(GSN_database->cls,
569 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Putting record for name `%s': %s\n",
570 name, (res == GNUNET_OK) ? "OK" : "FAIL");
574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "RECORD_PUT_RESPONSE");
575 rpr_msg.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_PUT_RESPONSE);
576 rpr_msg.op_id = rp_msg->gns_header.r_id;
577 rpr_msg.header.size = htons (sizeof (struct RecordPutResponseMessage));
578 if (GNUNET_OK == res)
579 rpr_msg.op_result = htons (GNUNET_OK);
581 rpr_msg.op_result = htons (GNUNET_NO);
582 GNUNET_SERVER_notification_context_unicast (snc, nc->client, (const struct GNUNET_MessageHeader *) &rpr_msg, GNUNET_NO);
584 GNUNET_SERVER_receive_done (client, GNUNET_OK);
587 struct CreateRecordContext
589 struct GNUNET_NAMESTORE_RecordData *rd;
590 struct GNUNET_CRYPTO_RsaPrivateKey *pkey;
591 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pubkey;
592 struct GNUNET_TIME_Absolute expire;
599 handle_create_record_it (void *cls,
600 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pubkey,
601 struct GNUNET_TIME_Absolute expire,
603 unsigned int rd_count,
604 const struct GNUNET_NAMESTORE_RecordData *rd,
605 const struct GNUNET_CRYPTO_RsaSignature *signature)
607 struct CreateRecordContext * crc = cls;
608 struct GNUNET_CRYPTO_RsaSignature *signature_new = NULL;
609 struct GNUNET_NAMESTORE_RecordData *rd_new = NULL;
611 int exist = GNUNET_SYSERR;
612 int update = GNUNET_NO;
614 int rd_count_new = 0;
616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found %u existing records for `%s'\n", rd_count, crc->name);
618 for (c = 0; c < rd_count; c++)
621 if ((crc->rd->record_type == rd[c].record_type) &&
622 (crc->rd->data_size == rd[c].data_size) &&
623 (0 == memcmp (crc->rd->data, rd[c].data, rd[c].data_size)))
625 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found existing records for `%s' to update expiration date!\n", crc->name);
627 if (crc->rd->expiration.abs_value != rd[c].expiration.abs_value)
633 if (exist == GNUNET_SYSERR)
634 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "NO existing records for `%s' to update!\n", crc->name);
636 if (exist == GNUNET_SYSERR)
638 rd_new = GNUNET_malloc ((rd_count+1) * sizeof (struct GNUNET_NAMESTORE_RecordData));
639 memcpy (rd_new, rd, rd_count * sizeof (struct GNUNET_NAMESTORE_RecordData));
640 rd_count_new = rd_count + 1;
641 rd_new[rd_count] = *(crc->rd);
642 signature_new = GNUNET_NAMESTORE_create_signature (crc->pkey, crc->name, rd_new, rd_count+1);
644 if (NULL == signature_new)
651 else if (update == GNUNET_NO)
653 /* Exact same record already exists */
654 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No update for %s' record required!\n", crc->name);
658 else if (update == GNUNET_YES)
661 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Updating existing records for `%s'!\n", crc->name);
662 rd_new = GNUNET_malloc ((rd_count) * sizeof (struct GNUNET_NAMESTORE_RecordData));
663 memcpy (rd_new, rd, rd_count * sizeof (struct GNUNET_NAMESTORE_RecordData));
664 rd_count_new = rd_count;
665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Updating expiration from %llu to %llu!\n", rd_new[exist].expiration.abs_value, crc->rd->expiration.abs_value);
666 rd_new[exist].expiration = crc->rd->expiration;
667 signature_new = GNUNET_NAMESTORE_create_signature (crc->pkey, crc->name, rd_new, rd_count_new);
668 if (NULL == signature_new)
676 /* Database operation */
677 GNUNET_assert ((rd_new != NULL) && (rd_count_new > 0));
678 res = GSN_database->put_records(GSN_database->cls,
679 (const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *) crc->pubkey,
682 rd_count_new, rd_new,
684 GNUNET_break (GNUNET_OK == res);
688 GNUNET_free_non_null (rd_new);
689 GNUNET_free_non_null (signature_new);
693 /* failed to create the record */
694 crc->res = GNUNET_SYSERR;
697 /* database operations OK */
698 if (GNUNET_YES == update)
699 /* we updated an existing record */
700 crc->res = GNUNET_NO;
702 /* we created a new record */
703 crc->res = GNUNET_YES;
706 /* identical entry existed, so we did nothing */
707 crc->res = GNUNET_NO;
713 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Update result for name `%s' %u\n", crc->name, res);
717 static void handle_record_create (void *cls,
718 struct GNUNET_SERVER_Client * client,
719 const struct GNUNET_MessageHeader * message)
721 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_RECORD_CREATE");
722 struct GNUNET_NAMESTORE_Client *nc;
723 struct CreateRecordContext crc;
724 struct GNUNET_CRYPTO_RsaPrivateKey *pkey;
725 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pub;
726 struct RecordCreateResponseMessage rcr_msg;
727 GNUNET_HashCode pubkey_hash;
739 int res = GNUNET_SYSERR;
741 if (ntohs (message->size) < sizeof (struct RecordCreateMessage))
744 GNUNET_SERVER_receive_done (client, GNUNET_OK);
748 nc = client_lookup(client);
752 GNUNET_SERVER_receive_done (client, GNUNET_OK);
756 struct RecordCreateMessage * rp_msg = (struct RecordCreateMessage *) message;
757 rid = ntohl (rp_msg->gns_header.r_id);
758 name_len = ntohs (rp_msg->name_len);
759 msg_size = ntohs (message->size);
760 rd_count = ntohs (rp_msg->rd_count);
761 rd_ser_len = ntohs (rp_msg->rd_len);
762 key_len = ntohs (rp_msg->pkey_len);
763 msg_size_exp = sizeof (struct RecordCreateMessage) + key_len + name_len + rd_ser_len;
765 if (msg_size != msg_size_exp)
767 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Expected message %u size but message size is %u \n", msg_size_exp, msg_size);
769 GNUNET_SERVER_receive_done (client, GNUNET_OK);
773 if ((name_len == 0) || (name_len > 256))
776 GNUNET_SERVER_receive_done (client, GNUNET_OK);
780 pkey_tmp = (char *) &rp_msg[1];
781 name_tmp = &pkey_tmp[key_len];
782 rd_ser = &name_tmp[name_len];
784 if (name_tmp[name_len -1] != '\0')
787 GNUNET_SERVER_receive_done (client, GNUNET_OK);
791 struct GNUNET_NAMESTORE_RecordData rd[rd_count];
792 res = GNUNET_NAMESTORE_records_deserialize(rd_ser_len, rd_ser, rd_count, rd);
793 if ((res != GNUNET_OK) || (rd_count != 1))
799 /* Extracting and converting private key */
800 pkey = GNUNET_CRYPTO_rsa_decode_key((char *) pkey_tmp, key_len);
801 GNUNET_assert (pkey != NULL);
802 GNUNET_CRYPTO_rsa_key_get_public(pkey, &pub);
803 GNUNET_CRYPTO_hash (&pub, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded), &pubkey_hash);
810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Creating record for name `%s' in zone `%s'\n", name_tmp, GNUNET_h2s(&pubkey_hash));
812 /* Get existing records for name */
813 res = GSN_database->iterate_records(GSN_database->cls, &pubkey_hash, name_tmp, 0, &handle_create_record_it, &crc);
814 if (res != GNUNET_SYSERR)
816 GNUNET_CRYPTO_rsa_key_free(pkey);
820 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "RECORD_CREATE_RESPONSE");
821 rcr_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_CREATE_RESPONSE);
822 rcr_msg.gns_header.r_id = htonl (rid);
823 rcr_msg.gns_header.header.size = htons (sizeof (struct RecordCreateResponseMessage));
824 if ((GNUNET_OK == res) && (crc.res == GNUNET_YES))
825 rcr_msg.op_result = htons (GNUNET_YES);
826 else if ((GNUNET_OK == res) && (crc.res == GNUNET_NO))
827 rcr_msg.op_result = htons (GNUNET_NO);
829 rcr_msg.op_result = htons (GNUNET_SYSERR);
830 GNUNET_SERVER_notification_context_unicast (snc, nc->client, (const struct GNUNET_MessageHeader *) &rcr_msg, GNUNET_NO);
832 GNUNET_SERVER_receive_done (client, GNUNET_OK);
836 struct RemoveRecordContext
838 struct GNUNET_NAMESTORE_RecordData *rd;
839 struct GNUNET_CRYPTO_RsaPrivateKey *pkey;
844 handle_record_remove_it (void *cls,
845 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
846 struct GNUNET_TIME_Absolute expire,
848 unsigned int rd_count,
849 const struct GNUNET_NAMESTORE_RecordData *rd,
850 const struct GNUNET_CRYPTO_RsaSignature *signature)
852 struct RemoveRecordContext *rrc = cls;
853 unsigned int rd_count_new = rd_count -1;
854 struct GNUNET_NAMESTORE_RecordData rd_new[rd_count_new];
857 int found = GNUNET_NO;
859 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Name `%s 'currently has %u records\n", name, rd_count);
863 /* Could not find record to remove */
868 /* Find record to remove */
870 for (c = 0; c < rd_count; c++)
872 if ((rd[c].expiration.abs_value == rrc->rd->expiration.abs_value) &&
873 (rd[c].flags == rrc->rd->flags) &&
874 (rd[c].record_type == rrc->rd->record_type) &&
875 (rd[c].data_size == rrc->rd->data_size) &&
876 (0 == memcmp (rd[c].data, rrc->rd->data, rrc->rd->data_size)))
878 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found record to remove!\n", rd_count);
888 if ((c2 != rd_count_new) || (found == GNUNET_NO))
890 /* Could not find record to remove */
894 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Name `%s' now has %u records\n", name, rd_count_new);
896 /* Create new signature */
897 struct GNUNET_CRYPTO_RsaSignature * new_signature;
898 new_signature = GNUNET_NAMESTORE_create_signature (rrc->pkey, name, rd_new, rd_count_new);
900 if (new_signature == NULL)
902 /* Signature failed */
908 res = GSN_database->put_records(GSN_database->cls,
912 rd_count_new, rd_new,
914 GNUNET_free (new_signature);
916 if (GNUNET_OK != res)
918 /* Could put records into database */
926 static void handle_record_remove (void *cls,
927 struct GNUNET_SERVER_Client * client,
928 const struct GNUNET_MessageHeader * message)
930 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "NAMESTORE_RECORD_REMOVE");
931 struct GNUNET_NAMESTORE_Client *nc;
932 struct RecordRemoveResponseMessage rrr_msg;
933 struct GNUNET_CRYPTO_RsaPrivateKey *pkey;
934 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pub;
935 GNUNET_HashCode pubkey_hash;
936 char * pkey_tmp = NULL;
937 char * name_tmp = NULL;
938 char * rd_ser = NULL;
941 size_t rd_ser_len = 0;
943 size_t msg_size_exp = 0;
947 int res = GNUNET_SYSERR;
949 if (ntohs (message->size) < sizeof (struct RecordRemoveMessage))
952 GNUNET_SERVER_receive_done (client, GNUNET_OK);
956 nc = client_lookup(client);
960 GNUNET_SERVER_receive_done (client, GNUNET_OK);
964 struct RecordRemoveMessage * rr_msg = (struct RecordRemoveMessage *) message;
965 rid = ntohl (rr_msg->gns_header.r_id);
966 name_len = ntohs (rr_msg->name_len);
967 rd_ser_len = ntohs (rr_msg->rd_len);
968 rd_count = ntohs (rr_msg->rd_count);
969 key_len = ntohs (rr_msg->key_len);
970 msg_size = ntohs (message->size);
972 if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
975 GNUNET_SERVER_receive_done (client, GNUNET_OK);
979 if ((rd_count != 1) || (rd_ser_len < 1) || (name_len >=256) || (name_len == 0))
982 GNUNET_SERVER_receive_done (client, GNUNET_OK);
986 msg_size_exp = sizeof (struct RecordRemoveMessage) + key_len + name_len + rd_ser_len;
987 if (msg_size != msg_size_exp)
989 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Expected message %u size but message size is %u \n", msg_size_exp, msg_size);
991 GNUNET_SERVER_receive_done (client, GNUNET_OK);
995 if ((rd_count != 1) || (rd_ser_len < 1) || (name_len >=256) || (name_len == 0))
998 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1002 pkey_tmp = (char *) &rr_msg[1];
1003 name_tmp = &pkey_tmp[key_len];
1004 rd_ser = &name_tmp[name_len];
1007 if ((name_len == 0) || (name_len > 256))
1009 GNUNET_break_op (0);
1010 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1014 if (name_tmp[name_len -1] != '\0')
1016 GNUNET_break_op (0);
1017 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1021 /* Extracting and converting private key */
1022 pkey = GNUNET_CRYPTO_rsa_decode_key((char *) pkey_tmp, key_len);
1023 GNUNET_assert (pkey != NULL);
1024 GNUNET_CRYPTO_rsa_key_get_public(pkey, &pub);
1025 GNUNET_CRYPTO_hash (&pub, sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded), &pubkey_hash);
1027 struct GNUNET_NAMESTORE_RecordData rd[rd_count];
1028 res = GNUNET_NAMESTORE_records_deserialize(rd_ser_len, rd_ser, rd_count, rd);
1029 if ((res != GNUNET_OK) || (rd_count != 1))
1031 GNUNET_break_op (0);
1035 struct RemoveRecordContext rrc;
1039 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Removing record for name `%s' in zone `%s'\n", name_tmp, GNUNET_h2s(&pubkey_hash));
1041 /* Database operation */
1042 res = GSN_database->iterate_records (GSN_database->cls,
1046 handle_record_remove_it, &rrc);
1048 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Removing record for name `%s': %s\n",
1049 name_tmp, (rrc.op_res == 0) ? "OK" : "FAIL");
1054 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "RECORD_REMOVE_RESPONSE");
1055 rrr_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_REMOVE_RESPONSE);
1056 rrr_msg.gns_header.r_id = rr_msg->gns_header.r_id;
1057 rrr_msg.gns_header.header.size = htons (sizeof (struct RecordRemoveResponseMessage));
1058 rrr_msg.op_result = htons (res);
1059 GNUNET_SERVER_notification_context_unicast (snc, nc->client, (const struct GNUNET_MessageHeader *) &rrr_msg, GNUNET_NO);
1061 GNUNET_CRYPTO_rsa_key_free (pkey);
1063 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1066 struct ZoneIterationProcResult
1069 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded zone_key;
1072 struct GNUNET_CRYPTO_RsaSignature signature;
1073 struct GNUNET_TIME_Absolute expire;
1083 void zone_iteration_proc (void *cls,
1084 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
1085 struct GNUNET_TIME_Absolute expire,
1087 unsigned int rd_count,
1088 const struct GNUNET_NAMESTORE_RecordData *rd,
1089 const struct GNUNET_CRYPTO_RsaSignature *signature)
1091 struct ZoneIterationProcResult *zipr = cls;
1093 if (zone_key != NULL)
1095 zipr->zone_key = *zone_key;
1096 zipr->have_zone_key = GNUNET_YES;
1099 zipr->have_zone_key = GNUNET_NO;
1101 zipr->expire = expire;
1105 memcpy (zipr->name, name, strlen(name) + 1);
1106 zipr->have_name = GNUNET_YES;
1109 zipr->have_name = GNUNET_NO;
1111 if (signature != NULL)
1113 zipr->signature = *signature;
1114 zipr->have_signature = GNUNET_YES;
1117 zipr->have_signature = GNUNET_NO;
1119 if ((rd_count > 0) && (rd != NULL))
1121 len = GNUNET_NAMESTORE_records_get_size(rd_count, rd);
1122 zipr->rd_ser = GNUNET_malloc (len);
1123 GNUNET_NAMESTORE_records_serialize(rd_count, rd, len, zipr->rd_ser);
1124 zipr->rd_ser_len = len;
1128 static void handle_iteration_start (void *cls,
1129 struct GNUNET_SERVER_Client * client,
1130 const struct GNUNET_MessageHeader * message)
1132 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ZONE_ITERATION_START");
1134 struct ZoneIterationStartMessage * zis_msg = (struct ZoneIterationStartMessage *) message;
1135 struct GNUNET_NAMESTORE_Client *nc;
1136 struct GNUNET_NAMESTORE_ZoneIteration *zi;
1137 struct ZoneIterationResponseMessage zir_msg;
1138 struct ZoneIterationProcResult zipr;
1141 nc = client_lookup(client);
1144 GNUNET_break_op (0);
1145 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1149 zi = GNUNET_malloc (sizeof (struct GNUNET_NAMESTORE_ZoneIteration));
1150 zi->request_id = ntohl (zis_msg->gns_header.r_id);
1153 zi->zone = zis_msg->zone;
1155 GNUNET_CONTAINER_DLL_insert (nc->op_head, nc->op_tail, zi);
1157 res = GSN_database->iterate_records (GSN_database->cls, &zis_msg->zone, NULL, zi->offset , &zone_iteration_proc, &zipr);
1160 /* GNUNET_OK on success */
1164 /* GNUNET_SYSERR on error */
1167 /* GNUNET_NO if there were no results, */
1175 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n", "ZONE_ITERATION_RESPONSE");
1176 zir_msg.gns_header.header.type = htons (GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_RESPONSE);
1177 zir_msg.gns_header.r_id = htonl(zi->request_id);
1178 zir_msg.gns_header.header.size = htons (sizeof (struct ZoneIterationResponseMessage));
1181 GNUNET_SERVER_notification_context_unicast (snc, zi->client->client, (const struct GNUNET_MessageHeader *) &zir_msg, GNUNET_NO);
1184 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1187 static void handle_iteration_stop (void *cls,
1188 struct GNUNET_SERVER_Client * client,
1189 const struct GNUNET_MessageHeader * message)
1191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ZONE_ITERATION_STOP");
1193 struct GNUNET_NAMESTORE_Client *nc;
1194 struct GNUNET_NAMESTORE_ZoneIteration *zi;
1195 struct ZoneIterationStopMessage * zis_msg = (struct ZoneIterationStopMessage *) message;
1198 nc = client_lookup(client);
1201 GNUNET_break_op (0);
1202 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1206 rid = ntohl (zis_msg->gns_header.r_id);
1207 for (zi = nc->op_head; zi != NULL; zi = zi->next)
1209 if (zi->request_id == rid)
1214 GNUNET_break_op (0);
1215 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1219 GNUNET_CONTAINER_DLL_remove(nc->op_head, nc->op_tail, zi);
1220 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Stopped zone iteration for zone `%s'\n", GNUNET_h2s (&zi->zone));
1223 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1226 static void handle_iteration_next (void *cls,
1227 struct GNUNET_SERVER_Client * client,
1228 const struct GNUNET_MessageHeader * message)
1230 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ZONE_ITERATION_NEXT");
1232 struct GNUNET_NAMESTORE_Client *nc;
1233 struct GNUNET_NAMESTORE_ZoneIteration *zi;
1234 struct ZoneIterationStopMessage * zis_msg = (struct ZoneIterationStopMessage *) message;
1238 nc = client_lookup(client);
1241 GNUNET_break_op (0);
1242 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1246 rid = ntohl (zis_msg->gns_header.r_id);
1247 for (zi = nc->op_head; zi != NULL; zi = zi->next)
1249 if (zi->request_id == rid)
1254 GNUNET_break_op (0);
1255 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1260 res = GSN_database->iterate_records (GSN_database->cls, &zi->zone, NULL, zi->offset , &zone_iteration_proc, zi);
1266 * Process template requests.
1268 * @param cls closure
1269 * @param server the initialized server
1270 * @param cfg configuration to use
1273 run (void *cls, struct GNUNET_SERVER_Handle *server,
1274 const struct GNUNET_CONFIGURATION_Handle *cfg)
1278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting namestore service\n");
1280 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
1281 {&handle_start, NULL,
1282 GNUNET_MESSAGE_TYPE_NAMESTORE_START, sizeof (struct StartMessage)},
1283 {&handle_stop, NULL,
1284 GNUNET_MESSAGE_TYPE_NAMESTORE_DISCONNECT, sizeof (struct DisconnectMessage)},
1285 {&handle_lookup_name, NULL,
1286 GNUNET_MESSAGE_TYPE_NAMESTORE_LOOKUP_NAME, 0},
1287 {&handle_record_put, NULL,
1288 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_PUT, 0},
1289 {&handle_record_create, NULL,
1290 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_CREATE, 0},
1291 {&handle_record_remove, NULL,
1292 GNUNET_MESSAGE_TYPE_NAMESTORE_RECORD_REMOVE, 0},
1293 {&handle_iteration_start, NULL,
1294 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_START, sizeof (struct ZoneIterationStartMessage)},
1295 {&handle_iteration_stop, NULL,
1296 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_STOP, sizeof (struct ZoneIterationStopMessage)},
1297 {&handle_iteration_next, NULL,
1298 GNUNET_MESSAGE_TYPE_NAMESTORE_ZONE_ITERATION_NEXT, 0},
1304 /* Loading database plugin */
1306 GNUNET_CONFIGURATION_get_value_string (cfg, "namestore", "database",
1308 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "No database backend configured\n");
1310 GNUNET_asprintf (&db_lib_name, "libgnunet_plugin_namestore_%s", database);
1311 GSN_database = GNUNET_PLUGIN_load (db_lib_name, (void *) GSN_cfg);
1312 if (GSN_database == NULL)
1313 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Could not load database backend `%s'\n",
1315 GNUNET_free (database);
1317 /* Configuring server handles */
1318 GNUNET_SERVER_add_handlers (server, handlers);
1319 snc = GNUNET_SERVER_notification_context_create (server, 16);
1320 GNUNET_SERVER_disconnect_notify (server,
1321 &client_disconnect_notification,
1324 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &cleanup_task,
1331 * The main function for the template service.
1333 * @param argc number of arguments from the command line
1334 * @param argv command line arguments
1335 * @return 0 ok, 1 on error
1338 main (int argc, char *const *argv)
1340 return (GNUNET_OK ==
1341 GNUNET_SERVICE_run (argc, argv, "namestore",
1342 GNUNET_SERVICE_OPTION_NONE, &run, NULL)) ? 0 : 1;
1345 /* end of gnunet-service-namestore.c */