2 This file is part of GNUnet.
3 (C) 2009, 2010, 2011 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.
24 * @file gns/gnunet-service-gns_resolver.c
25 * @brief GNUnet GNS resolver logic
26 * @author Martin Schanzenbach
29 #include "gnunet_util_lib.h"
30 #include "gnunet_transport_service.h"
31 #include "gnunet_dns_service.h"
32 #include "gnunet_dht_service.h"
33 #include "gnunet_namestore_service.h"
34 #include "gnunet_vpn_service.h"
35 #include "gnunet_dns_service.h"
36 #include "gnunet_resolver_service.h"
37 #include "gnunet_dnsparser_lib.h"
38 #include "../dns/dnsparser.h"
39 #include "gnunet_gns_service.h"
40 #include "block_gns.h"
42 #include "gnunet-service-gns_resolver.h"
44 #define DHT_LOOKUP_TIMEOUT DHT_OPERATION_TIMEOUT
45 #define DHT_GNS_REPLICATION_LEVEL 5
46 #define MAX_DNS_LABEL_LENGTH 63
50 * Our handle to the namestore service
52 static struct GNUNET_NAMESTORE_Handle *namestore_handle;
55 * Our handle to the vpn service
57 static struct GNUNET_VPN_Handle *vpn_handle;
60 * Resolver handle to the dht
62 static struct GNUNET_DHT_Handle *dht_handle;
65 * Heap for parallel DHT lookups
67 static struct GNUNET_CONTAINER_Heap *dht_lookup_heap;
70 * Maximum amount of parallel queries in background
72 static unsigned long long max_allowed_background_queries;
75 * Wheather or not to ignore pending records
77 static int ignore_pending_records;
82 static struct GNUNET_CRYPTO_ShortHashCode local_zone;
85 * Background shortening handles
87 static struct GetPseuAuthorityHandle *gph_head;
90 * Background shortening handles
92 static struct GetPseuAuthorityHandle *gph_tail;
95 * a resolution identifier pool variable
97 * This is a non critical identifier useful for debugging
99 static unsigned long long rid = 0;
109 if (NULL == strstr (name, "._"))
112 ndup = GNUNET_strdup (name);
115 if (NULL == strtok (NULL, "."))
118 if (NULL == strtok (NULL, "."))
121 if (NULL != strtok (NULL, "."))
128 * Determine if this name is canonical.
130 * a.b.gnunet = not canonical
133 * @param name the name to test
134 * @return 1 if canonical
137 is_canonical(char* name)
142 ndup = GNUNET_strdup (name);
143 tok = strtok (ndup, ".");
145 for (tok = strtok (NULL, "."); tok != NULL; tok = strtok (NULL, "."))
161 * Callback that shortens authorities
163 * @param gph the handle containing the name to shorten
166 shorten_authority_chain (struct GetPseuAuthorityHandle *gph);
170 * Namestore calls this function if we have record for this name.
171 * (or with rd_count=0 to indicate no matches)
173 * @param cls the pending query
174 * @param key the key of the zone we did the lookup
175 * @param expiration expiration date of the namestore entry
176 * @param name the name for which we need an authority
177 * @param rd_count the number of records with 'name'
178 * @param rd the record data
179 * @param signature the signature of the authority for the record data
182 process_pseu_lookup_ns (void* cls,
183 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
184 struct GNUNET_TIME_Absolute expiration,
185 const char *name, unsigned int rd_count,
186 const struct GNUNET_NAMESTORE_RecordData *rd,
187 const struct GNUNET_CRYPTO_RsaSignature *signature)
189 struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
190 struct GNUNET_NAMESTORE_RecordData new_pkey;
191 struct AuthorityChain *iter;
195 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
196 "GNS_AUTO_PSEU: Name %s already taken in NS!\n", name);
197 if (0 == strcmp (gph->name, name))
199 if (gph->ahead->next != NULL)
201 if (GNUNET_CRYPTO_short_hash_cmp (&gph->ahead->next->zone,
204 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "GNS_GET_AUTH: trying next!\n");
205 iter = gph->ahead->next;
206 GNUNET_free (gph->ahead);
208 shorten_authority_chain (gph);
216 iter = gph->ahead->next;
217 GNUNET_free (gph->ahead);
219 } while (iter != NULL);
220 GNUNET_CRYPTO_rsa_key_free (gph->key);
221 GNUNET_CONTAINER_DLL_remove (gph_head, gph_tail, gph);
226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
227 "GNS_AUTO_PSEU: Trying delegated name %s\n", gph->name);
228 memcpy (gph->test_name, gph->name, strlen (gph->name)+1);
229 GNUNET_NAMESTORE_lookup_record (namestore_handle,
232 GNUNET_NAMESTORE_TYPE_ANY,
233 &process_pseu_lookup_ns,
239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
240 "GNS_AUTO_PSEU: Name %s not taken in NS! Adding\n", gph->test_name);
242 new_pkey.expiration_time = UINT64_MAX;
243 new_pkey.data_size = sizeof (struct GNUNET_CRYPTO_ShortHashCode);
244 new_pkey.data = &gph->ahead->zone;
245 new_pkey.record_type = GNUNET_GNS_RECORD_PKEY;
246 new_pkey.flags = GNUNET_NAMESTORE_RF_AUTHORITY
247 | GNUNET_NAMESTORE_RF_PRIVATE
248 | GNUNET_NAMESTORE_RF_PENDING;
249 GNUNET_NAMESTORE_record_create (namestore_handle,
257 iter = gph->ahead->next;
258 GNUNET_free (gph->ahead);
260 } while (iter != NULL);
261 GNUNET_CRYPTO_rsa_key_free (gph->key);
262 GNUNET_CONTAINER_DLL_remove (gph_head, gph_tail, gph);
268 * process result of a dht pseu lookup
270 * @param gph the handle
271 * @param name the pseu result or NULL
274 process_pseu_result (struct GetPseuAuthorityHandle* gph, char* name)
278 memcpy (gph->test_name, gph->ahead->name, strlen (gph->ahead->name)+1);
282 memcpy (gph->test_name, name, strlen(name)+1);
285 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
286 "GNS_AUTO_PSEU: Checking %s for collision in NS\n",
290 * Check for collision
292 GNUNET_NAMESTORE_lookup_record (namestore_handle,
295 GNUNET_NAMESTORE_TYPE_ANY,
296 &process_pseu_lookup_ns,
301 * Handle timeout for dht request
303 * @param cls the request handle as closure
304 * @param tc the task context
307 handle_auth_discovery_timeout(void *cls,
308 const struct GNUNET_SCHEDULER_TaskContext *tc)
310 struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
311 struct AuthorityChain *iter;
313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
314 "GNS_GET_AUTH: dht lookup for query PSEU timed out.\n");
315 GNUNET_DHT_get_stop (gph->get_handle);
316 gph->get_handle = NULL;
318 if (gph->ahead->next != NULL)
320 if (GNUNET_CRYPTO_short_hash_cmp (&gph->ahead->next->zone,
323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "GNS_GET_AUTH: trying next!\n");
324 iter = gph->ahead->next;
325 GNUNET_free (gph->ahead);
327 shorten_authority_chain (gph);
332 process_pseu_result (gph, NULL);
336 * Function called when we find a PSEU entry in the DHT
338 * @param cls the request handle
339 * @param exp lifetime
340 * @param key the key the record was stored under
341 * @param get_path get path
342 * @param get_path_length get path length
343 * @param put_path put path
344 * @param put_path_length put path length
345 * @param type the block type
346 * @param size the size of the record
347 * @param data the record data
350 process_auth_discovery_dht_result(void* cls,
351 struct GNUNET_TIME_Absolute exp,
352 const struct GNUNET_HashCode * key,
353 const struct GNUNET_PeerIdentity *get_path,
354 unsigned int get_path_length,
355 const struct GNUNET_PeerIdentity *put_path,
356 unsigned int put_path_length,
357 enum GNUNET_BLOCK_Type type,
358 size_t size, const void *data)
360 struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
361 struct AuthorityChain *iter;
362 struct GNSNameRecordBlock *nrb;
363 char* rd_data = (char*)data;
369 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
370 "GNS_GET_AUTH: got dht result (size=%d)\n", size);
373 /* stop lookup and timeout task */
374 GNUNET_DHT_get_stop (gph->get_handle);
375 gph->get_handle = NULL;
376 GNUNET_SCHEDULER_cancel (gph->timeout);
380 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
381 "GNS_GET_AUTH: got dht result null!\n", size);
385 iter = gph->ahead->next;
386 GNUNET_free (gph->ahead);
388 } while (iter != NULL);
389 GNUNET_CRYPTO_rsa_key_free (gph->key);
390 GNUNET_CONTAINER_DLL_remove (gph_head, gph_tail, gph);
395 nrb = (struct GNSNameRecordBlock*)data;
399 nrb = (struct GNSNameRecordBlock*)data;
401 name = (char*)&nrb[1];
402 num_records = ntohl (nrb->rd_count);
404 struct GNUNET_NAMESTORE_RecordData rd[num_records];
406 rd_data += strlen (name) + 1 + sizeof (struct GNSNameRecordBlock);
407 rd_size = size - strlen (name) - 1 - sizeof (struct GNSNameRecordBlock);
409 if (GNUNET_SYSERR == GNUNET_NAMESTORE_records_deserialize (rd_size,
414 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
415 "GNS_GET_AUTH: Error deserializing data!\n");
419 for (i=0; i < num_records; i++)
421 if ((strcmp (name, "+") == 0) &&
422 (rd[i].record_type == GNUNET_GNS_RECORD_PSEU))
425 process_pseu_result (gph, (char*)rd[i].data);
432 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "GNS_GET_AUTH: no pseu in dht!\n");
434 if (gph->ahead->next != NULL)
436 if (GNUNET_CRYPTO_short_hash_cmp (&gph->ahead->next->zone,
439 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "GNS_GET_AUTH: trying next!\n");
440 iter = gph->ahead->next;
441 GNUNET_free (gph->ahead);
443 shorten_authority_chain (gph);
447 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
448 "GNS_GET_AUTH: finished shorten, no results!\n");
449 process_pseu_result (gph, NULL);
453 * Process PSEU discovery for shorten via namestore
455 * @param cls the GetPseuAuthorityHandle
456 * @param key the public key
457 * @param expiration recorddata expiration
458 * @param name the looked up name
459 * @param rd_count number of records in set
460 * @param rd record data
461 * @param signature the signature
464 process_auth_discovery_ns_result(void* cls,
465 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
466 struct GNUNET_TIME_Absolute expiration,
468 unsigned int rd_count,
469 const struct GNUNET_NAMESTORE_RecordData *rd,
470 const struct GNUNET_CRYPTO_RsaSignature *signature)
473 struct GNUNET_CRYPTO_ShortHashCode name_hash;
474 struct GNUNET_HashCode lookup_key;
475 struct GNUNET_CRYPTO_HashAsciiEncoded lookup_key_string;
476 struct GNUNET_HashCode name_hash_double;
477 struct GNUNET_HashCode zone_hash_double;
479 struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
480 struct AuthorityChain *iter;
488 GNUNET_CRYPTO_short_hash ("+", strlen ("+"), &name_hash);
489 GNUNET_CRYPTO_short_hash_double (&name_hash, &name_hash_double);
490 GNUNET_CRYPTO_short_hash_double (&gph->ahead->zone, &zone_hash_double);
491 GNUNET_CRYPTO_hash_xor (&name_hash_double, &zone_hash_double, &lookup_key);
492 GNUNET_CRYPTO_hash_to_enc (&lookup_key, &lookup_key_string);
494 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
495 "GNS_AUTO_PSEU: starting dht lookup for %s with key: %s\n",
496 "+", (char*)&lookup_key_string);
498 gph->timeout = GNUNET_SCHEDULER_add_delayed (DHT_LOOKUP_TIMEOUT,
499 &handle_auth_discovery_timeout, gph);
501 xquery = htonl (GNUNET_GNS_RECORD_PSEU);
503 GNUNET_assert (gph->get_handle == NULL);
505 gph->get_handle = GNUNET_DHT_get_start(dht_handle,
506 GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
508 DHT_GNS_REPLICATION_LEVEL,
512 &process_auth_discovery_dht_result,
517 for (i=0; i < rd_count; i++)
519 if ((strcmp (name, "+") == 0) &&
520 (rd[i].record_type == GNUNET_GNS_RECORD_PSEU))
523 process_pseu_result (gph, (char*)rd[i].data);
528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "GNS_GET_AUTH: no pseu in namestore!\n");
530 if (gph->ahead->next != NULL)
532 if (GNUNET_CRYPTO_short_hash_cmp (&gph->ahead->next->zone,
535 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "GNS_GET_AUTH: trying next!\n");
536 iter = gph->ahead->next;
537 GNUNET_free (gph->ahead);
539 shorten_authority_chain (gph);
544 process_pseu_result (gph, NULL);
548 * Callback called by namestore for a zone to name
551 * @param cls the closure
552 * @param zone_key the zone we queried
553 * @param expire the expiration time of the name
554 * @param name the name found or NULL
555 * @param rd_len number of records for the name
556 * @param rd the record data (PKEY) for the name
557 * @param signature the signature for the record data
560 process_zone_to_name_discover (void *cls,
561 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
562 struct GNUNET_TIME_Absolute expire,
565 const struct GNUNET_NAMESTORE_RecordData *rd,
566 const struct GNUNET_CRYPTO_RsaSignature *signature)
568 struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
569 struct AuthorityChain *iter;
571 /* we found a match in our own zone */
574 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
575 "GNS_AUTO_PSEU: name for zone in our root %s\n", name);
580 iter = gph->ahead->next;
581 GNUNET_free (gph->ahead);
583 } while (iter != NULL);
584 GNUNET_CRYPTO_rsa_key_free (gph->key);
585 GNUNET_CONTAINER_DLL_remove (gph_head, gph_tail, gph);
591 GNUNET_NAMESTORE_lookup_record (namestore_handle,
594 GNUNET_GNS_RECORD_PSEU,
595 &process_auth_discovery_ns_result,
603 * Callback that shortens authorities
605 * @param gph the handle to the shorten request
608 shorten_authority_chain (struct GetPseuAuthorityHandle *gph)
611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
612 "GNS_AUTO_PSEU: New authority %s discovered\n",
615 GNUNET_NAMESTORE_zone_to_name (namestore_handle,
618 &process_zone_to_name_discover,
624 start_shorten (struct AuthorityChain *atail,
625 struct GNUNET_CRYPTO_RsaPrivateKey *key)
627 struct AuthorityChain *new_head = NULL;
628 struct AuthorityChain *new_tail = NULL;
629 struct AuthorityChain *iter;
630 struct AuthorityChain *acopy;
631 struct GetPseuAuthorityHandle *gph;
632 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
633 struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *pb_key;
635 /* First copy the authority chain in reverse order */
636 for (iter = atail; iter != NULL; iter = iter->prev)
638 acopy = GNUNET_malloc (sizeof (struct AuthorityChain));
639 memcpy (acopy, iter, sizeof (struct AuthorityChain));
642 GNUNET_CONTAINER_DLL_insert (new_head, new_tail, acopy);
645 gph = GNUNET_malloc (sizeof (struct GetPseuAuthorityHandle));
647 GNUNET_CRYPTO_rsa_key_get_public (key, &pkey);
648 pb_key = GNUNET_CRYPTO_rsa_encode_key (key);
649 gph->key = GNUNET_CRYPTO_rsa_decode_key ((char*)pb_key, ntohs (pb_key->len));
650 //gph->key = key;//GNUNET_malloc (sizeof (struct GNUNET_CRYPTO_RsaPrivateKey));
651 //memcpy (gph->key, key, sizeof (struct GNUNET_CRYPTO_RsaPrivateKey));
653 GNUNET_CRYPTO_short_hash (&pkey,
654 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
656 gph->ahead = new_head;
658 GNUNET_CONTAINER_DLL_insert (gph_head, gph_tail, gph);
660 shorten_authority_chain (gph);
664 * Initialize the resolver
666 * @param nh the namestore handle
667 * @param dh the dht handle
668 * @param lz the local zone's hash
669 * @param cfg configuration handle
670 * @param max_bg_queries maximum number of parallel background queries in dht
671 * @param ignore_pending ignore records that still require user confirmation
673 * @return GNUNET_OK on success
676 gns_resolver_init(struct GNUNET_NAMESTORE_Handle *nh,
677 struct GNUNET_DHT_Handle *dh,
678 struct GNUNET_CRYPTO_ShortHashCode lz,
679 const struct GNUNET_CONFIGURATION_Handle *cfg,
680 unsigned long long max_bg_queries,
683 namestore_handle = nh;
687 GNUNET_CONTAINER_heap_create(GNUNET_CONTAINER_HEAP_ORDER_MIN);
688 max_allowed_background_queries = max_bg_queries;
689 ignore_pending_records = ignore_pending;
694 GNUNET_RESOLVER_connect (cfg);
696 if (NULL == vpn_handle)
698 vpn_handle = GNUNET_VPN_connect (cfg);
699 if (NULL == vpn_handle)
701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
702 "GNS_PHASE_INIT: Error connecting to VPN!\n");
704 return GNUNET_SYSERR;
708 if ((namestore_handle != NULL) && (dht_handle != NULL))
713 return GNUNET_SYSERR;
717 * Cleanup background lookups
719 * @param cls closure to iterator
720 * @param node heap nodes
721 * @param element the resolver handle
722 * @param cost heap cost
723 * @return always GNUNET_YES
726 cleanup_pending_background_queries(void* cls,
727 struct GNUNET_CONTAINER_HeapNode *node,
729 GNUNET_CONTAINER_HeapCostType cost)
731 struct ResolverHandle *rh = (struct ResolverHandle *)element;
732 ResolverCleanupContinuation cont = cls;
734 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
735 "GNS_CLEANUP-%llu: Terminating background lookup for %s\n",
737 GNUNET_DHT_get_stop(rh->get_handle);
738 rh->get_handle = NULL;
739 rh->proc(rh->proc_cls, rh, 0, NULL);
741 GNUNET_CONTAINER_heap_remove_node(node);
743 if (GNUNET_CONTAINER_heap_get_size(dht_lookup_heap) == 0)
755 gns_resolver_cleanup(ResolverCleanupContinuation cont)
757 unsigned int s = GNUNET_CONTAINER_heap_get_size(dht_lookup_heap);
758 struct GetPseuAuthorityHandle *tmp;
759 struct AuthorityChain *iter;
761 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
762 "GNS_CLEANUP: %d pending background queries to terminate\n", s);
765 for (tmp = gph_head; tmp != NULL; tmp = gph_head)
767 if (tmp->get_handle != NULL)
768 GNUNET_DHT_get_stop (tmp->get_handle);
769 tmp->get_handle = NULL;
770 if (tmp->timeout != GNUNET_SCHEDULER_NO_TASK)
771 GNUNET_SCHEDULER_cancel (tmp->timeout);
772 tmp->timeout = GNUNET_SCHEDULER_NO_TASK;
777 iter = tmp->ahead->next;
778 GNUNET_free (tmp->ahead);
780 } while (iter != NULL);
782 GNUNET_CRYPTO_rsa_key_free (tmp->key);
783 GNUNET_CONTAINER_DLL_remove (gph_head, gph_tail, tmp);
789 GNUNET_CONTAINER_heap_iterate (dht_lookup_heap,
790 &cleanup_pending_background_queries,
798 * Helper function to free resolver handle
800 * @param rh the handle to free
803 free_resolver_handle(struct ResolverHandle* rh)
805 struct AuthorityChain *ac;
806 struct AuthorityChain *ac_next;
811 ac = rh->authority_chain_head;
820 if (NULL != rh->dns_raw_packet)
821 GNUNET_free (rh->dns_raw_packet);
828 * Callback when record data is put into namestore
830 * @param cls the closure
831 * @param success GNUNET_OK on success
832 * @param emsg the error message. NULL if SUCCESS==GNUNET_OK
835 on_namestore_record_put_result(void *cls,
839 if (GNUNET_NO == success)
841 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
842 "GNS_NS: records already in namestore\n");
845 else if (GNUNET_YES == success)
847 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
848 "GNS_NS: records successfully put in namestore\n");
852 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
853 "GNS_NS: Error putting records into namestore: %s\n", emsg);
857 handle_lookup_timeout(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
859 struct ResolverHandle *rh = cls;
861 if (rh->timeout_cont)
862 rh->timeout_cont(rh->timeout_cont_cls, tc);
866 * Processor for background lookups in the DHT
868 * @param cls closure (NULL)
869 * @param rd_count number of records found (not 0)
870 * @param rd record data
873 background_lookup_result_processor(void *cls,
875 const struct GNUNET_NAMESTORE_RecordData *rd)
877 //We could do sth verbose/more useful here but it doesn't make any difference
878 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
879 "GNS_BG: background dht lookup finished. (%d results)\n",
884 * Handle timeout for DHT requests
886 * @param cls the request handle as closure
887 * @param tc the task context
890 dht_lookup_timeout(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
892 struct ResolverHandle *rh = cls;
893 struct RecordLookupHandle *rlh = (struct RecordLookupHandle *)rh->proc_cls;
894 char new_name[MAX_DNS_NAME_LENGTH];
896 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
897 "GNS_PHASE_REC-%d: dht lookup for query %s (%ds)timed out.\n",
898 rh->id, rh->name, rh->timeout.rel_value);
900 * Start resolution in bg
902 //strcpy(new_name, rh->name);
903 //memcpy(new_name+strlen(new_name), GNUNET_GNS_TLD, strlen(GNUNET_GNS_TLD));
904 GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
905 rh->name, GNUNET_GNS_TLD);
907 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
908 "GNS_PHASE_REC-%d: Starting background lookup for %s type %d\n",
909 rh->id, new_name, rlh->record_type);
911 gns_resolver_lookup_record(rh->authority,
912 rh->private_local_zone,
916 GNUNET_TIME_UNIT_FOREVER_REL,
918 &background_lookup_result_processor,
920 rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
922 GNUNET_DHT_get_stop (rh->get_handle);
923 rh->get_handle = NULL;
924 rh->proc(rh->proc_cls, rh, 0, NULL);
929 * Function called when we get a result from the dht
930 * for our record query
932 * @param cls the request handle
933 * @param exp lifetime
934 * @param key the key the record was stored under
935 * @param get_path get path
936 * @param get_path_length get path length
937 * @param put_path put path
938 * @param put_path_length put path length
939 * @param type the block type
940 * @param size the size of the record
941 * @param data the record data
944 process_record_result_dht(void* cls,
945 struct GNUNET_TIME_Absolute exp,
946 const struct GNUNET_HashCode * key,
947 const struct GNUNET_PeerIdentity *get_path,
948 unsigned int get_path_length,
949 const struct GNUNET_PeerIdentity *put_path,
950 unsigned int put_path_length,
951 enum GNUNET_BLOCK_Type type,
952 size_t size, const void *data)
954 struct ResolverHandle *rh;
955 struct RecordLookupHandle *rlh;
956 struct GNSNameRecordBlock *nrb;
957 uint32_t num_records;
959 char* rd_data = (char*)data;
963 rh = (struct ResolverHandle *)cls;
964 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
965 "GNS_PHASE_REC-%d: got dht result (size=%d)\n", rh->id, size);
967 //FIXME maybe check expiration here, check block type
970 rlh = (struct RecordLookupHandle *) rh->proc_cls;
971 nrb = (struct GNSNameRecordBlock*)data;
973 /* stop lookup and timeout task */
974 GNUNET_DHT_get_stop (rh->get_handle);
975 rh->get_handle = NULL;
977 if (rh->dht_heap_node != NULL)
979 GNUNET_CONTAINER_heap_remove_node(rh->dht_heap_node);
980 rh->dht_heap_node = NULL;
983 if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
985 GNUNET_SCHEDULER_cancel(rh->timeout_task);
986 rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
989 rh->get_handle = NULL;
990 name = (char*)&nrb[1];
991 num_records = ntohl(nrb->rd_count);
993 struct GNUNET_NAMESTORE_RecordData rd[num_records];
995 rd_data += strlen(name) + 1 + sizeof(struct GNSNameRecordBlock);
996 rd_size = size - strlen(name) - 1 - sizeof(struct GNSNameRecordBlock);
998 if (GNUNET_SYSERR == GNUNET_NAMESTORE_records_deserialize (rd_size,
1003 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1004 "GNS_PHASE_REC-%d: Error deserializing data!\n", rh->id);
1008 for (i=0; i<num_records; i++)
1010 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1011 "GNS_PHASE_REC-%d: Got name: %s (wanted %s)\n",
1012 rh->id, name, rh->name);
1013 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1014 "GNS_PHASE_REC-%d: Got type: %d (wanted %d)\n",
1015 rh->id, rd[i].record_type, rlh->record_type);
1016 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1017 "GNS_PHASE_REC-%d: Got data length: %d\n",
1018 rh->id, rd[i].data_size);
1019 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1020 "GNS_PHASE_REC-%d: Got flag %d\n",
1021 rh->id, rd[i].flags);
1023 if ((strcmp(name, rh->name) == 0) &&
1024 (rd[i].record_type == rlh->record_type))
1032 * FIXME check pubkey against existing key in namestore?
1033 * https://gnunet.org/bugs/view.php?id=2179
1036 /* Save to namestore */
1037 GNUNET_NAMESTORE_record_put (namestore_handle,
1044 &on_namestore_record_put_result, //cont
1049 rh->proc(rh->proc_cls, rh, num_records, rd);
1051 rh->proc(rh->proc_cls, rh, 0, NULL);
1058 * Start DHT lookup for a (name -> query->record_type) record in
1059 * rh->authority's zone
1061 * @param rh the pending gns query context
1064 resolve_record_dht (struct ResolverHandle *rh)
1067 struct GNUNET_CRYPTO_ShortHashCode name_hash;
1068 struct GNUNET_HashCode lookup_key;
1069 struct GNUNET_HashCode name_hash_double;
1070 struct GNUNET_HashCode zone_hash_double;
1071 struct GNUNET_CRYPTO_HashAsciiEncoded lookup_key_string;
1072 struct RecordLookupHandle *rlh = (struct RecordLookupHandle *)rh->proc_cls;
1073 struct ResolverHandle *rh_heap_root;
1075 GNUNET_CRYPTO_short_hash(rh->name, strlen(rh->name), &name_hash);
1076 GNUNET_CRYPTO_short_hash_double(&name_hash, &name_hash_double);
1077 GNUNET_CRYPTO_short_hash_double(&rh->authority, &zone_hash_double);
1078 GNUNET_CRYPTO_hash_xor(&name_hash_double, &zone_hash_double, &lookup_key);
1079 GNUNET_CRYPTO_hash_to_enc (&lookup_key, &lookup_key_string);
1081 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1082 "GNS_PHASE_REC-%d: starting dht lookup for %s with key: %s\n",
1083 rh->id, rh->name, (char*)&lookup_key_string);
1085 //rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1086 rh->dht_heap_node = NULL;
1088 if (rh->timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
1091 * Update timeout if necessary
1093 if (rh->timeout_task == GNUNET_SCHEDULER_NO_TASK)
1096 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1097 "GNS_PHASE_REC-%d: Adjusting timeout\n", rh->id);
1099 * Set timeout for authority lookup phase to 1/2
1101 rh->timeout_task = GNUNET_SCHEDULER_add_delayed(
1102 GNUNET_TIME_relative_divide(rh->timeout, 2),
1103 &handle_lookup_timeout,
1106 //rh->timeout_task = GNUNET_SCHEDULER_add_delayed (DHT_LOOKUP_TIMEOUT,
1107 // &dht_lookup_timeout,
1109 rh->timeout_cont = &dht_lookup_timeout;
1110 rh->timeout_cont_cls = rh;
1114 if (max_allowed_background_queries <=
1115 GNUNET_CONTAINER_heap_get_size (dht_lookup_heap))
1117 rh_heap_root = GNUNET_CONTAINER_heap_remove_root (dht_lookup_heap);
1118 GNUNET_DHT_get_stop(rh_heap_root->get_handle);
1119 rh_heap_root->get_handle = NULL;
1120 rh_heap_root->dht_heap_node = NULL;
1122 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1123 "GNS_PHASE_REC-%d: Replacing oldest background query for %s\n",
1124 rh->id, rh_heap_root->name);
1125 rh_heap_root->proc(rh_heap_root->proc_cls,
1130 rh->dht_heap_node = GNUNET_CONTAINER_heap_insert (dht_lookup_heap,
1132 GNUNET_TIME_absolute_get().abs_value);
1135 xquery = htonl(rlh->record_type);
1137 GNUNET_assert(rh->get_handle == NULL);
1138 rh->get_handle = GNUNET_DHT_get_start(dht_handle,
1139 GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
1141 DHT_GNS_REPLICATION_LEVEL,
1145 &process_record_result_dht,
1152 * Namestore calls this function if we have record for this name.
1153 * (or with rd_count=0 to indicate no matches)
1155 * @param cls the pending query
1156 * @param key the key of the zone we did the lookup
1157 * @param expiration expiration date of the namestore entry
1158 * @param name the name for which we need an authority
1159 * @param rd_count the number of records with 'name'
1160 * @param rd the record data
1161 * @param signature the signature of the authority for the record data
1164 process_record_result_ns (void* cls,
1165 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
1166 struct GNUNET_TIME_Absolute expiration,
1167 const char *name, unsigned int rd_count,
1168 const struct GNUNET_NAMESTORE_RecordData *rd,
1169 const struct GNUNET_CRYPTO_RsaSignature *signature)
1171 struct ResolverHandle *rh;
1172 struct RecordLookupHandle *rlh;
1173 struct GNUNET_TIME_Relative remaining_time;
1174 struct GNUNET_CRYPTO_ShortHashCode zone;
1175 struct GNUNET_TIME_Absolute et;
1178 rh = (struct ResolverHandle *) cls;
1179 rlh = (struct RecordLookupHandle *)rh->proc_cls;
1180 GNUNET_CRYPTO_short_hash(key,
1181 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1183 remaining_time = GNUNET_TIME_absolute_get_remaining (expiration);
1191 rh->status |= RSL_RECORD_EXISTS;
1193 if (remaining_time.rel_value == 0)
1195 rh->status |= RSL_RECORD_EXPIRED;
1202 * Lookup terminated and no results
1204 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1205 "GNS_PHASE_REC-%d: Namestore lookup for %s terminated without results\n",
1208 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1209 "GNS_PHASE_REC-%d: Record %s unknown in namestore\n",
1212 * Our zone and no result? Cannot resolve TT
1214 rh->proc(rh->proc_cls, rh, 0, NULL);
1220 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1221 "GNS_PHASE_REC-%d: Processing additional result %s from namestore\n",
1223 for (i=0; i<rd_count;i++)
1225 if (rd[i].record_type != rlh->record_type)
1228 if (ignore_pending_records &&
1229 (rd[i].flags & GNUNET_NAMESTORE_RF_PENDING))
1231 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1232 "GNS_PHASE_REC-%d: Record %s is awaiting user confirmation. Skipping\n",
1237 GNUNET_break (0 == (rd[i].flags & GNUNET_NAMESTORE_RF_RELATIVE_EXPIRATION));
1238 et.abs_value = rd[i].expiration_time;
1239 if ((GNUNET_TIME_absolute_get_remaining (et)).rel_value
1242 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1243 "GNS_PHASE_REC-%d: This record is expired. Skipping\n",
1253 if (rh->answered == 0)
1255 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1256 "GNS_PHASE_REC-%d: No answers found. This is odd!\n", rh->id);
1257 rh->proc(rh->proc_cls, rh, 0, NULL);
1261 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1262 "GNS_PHASE_REC-%d: Found %d answer(s) to query in %d records!\n",
1263 rh->id, rh->answered, rd_count);
1265 rh->proc(rh->proc_cls, rh, rd_count, rd);
1271 * VPN redirect result callback
1273 * @param cls the resolver handle
1274 * @param af the requested address family
1275 * @param address in_addr(6) respectively
1278 process_record_result_vpn (void* cls, int af, const void *address)
1280 struct ResolverHandle *rh = cls;
1281 struct RecordLookupHandle *rlh;
1282 struct GNUNET_NAMESTORE_RecordData rd;
1284 rlh = (struct RecordLookupHandle *)rh->proc_cls;
1286 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1287 "GNS_PHASE_REC_VPN-%d: Got answer from VPN to query!\n",
1291 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1292 "GNS_PHASE_REC-%d: Answer is IPv4!\n",
1294 if (rlh->record_type != GNUNET_GNS_RECORD_TYPE_A)
1296 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1297 "GNS_PHASE_REC-%d: Requested record is not IPv4!\n",
1299 rh->proc (rh->proc_cls, rh, 0, NULL);
1302 rd.record_type = GNUNET_GNS_RECORD_TYPE_A;
1303 rd.expiration_time = UINT64_MAX; /* FIXME: should probably pick something shorter... */
1305 rd.data_size = sizeof (struct in_addr);
1307 rh->proc (rh->proc_cls, rh, 1, &rd);
1310 else if (af == AF_INET6)
1312 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1313 "GNS_PHASE_REC-%d: Answer is IPv6!\n",
1315 if (rlh->record_type != GNUNET_GNS_RECORD_AAAA)
1317 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1318 "GNS_PHASE_REC-%d: Requested record is not IPv6!\n",
1320 rh->proc (rh->proc_cls, rh, 0, NULL);
1323 rd.record_type = GNUNET_GNS_RECORD_AAAA;
1324 rd.expiration_time = UINT64_MAX; /* FIXME: should probably pick something shorter... */
1326 rd.data_size = sizeof (struct in6_addr);
1328 rh->proc (rh->proc_cls, rh, 1, &rd);
1332 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1333 "GNS_PHASE_REC-%d: Got garbage from VPN!\n",
1335 rh->proc (rh->proc_cls, rh, 0, NULL);
1342 * @param rh resolver handle
1343 * @param rlh record lookup handle
1344 * @param rd_count number of results
1348 finish_lookup(struct ResolverHandle *rh,
1349 struct RecordLookupHandle* rlh,
1350 unsigned int rd_count,
1351 const struct GNUNET_NAMESTORE_RecordData *rd);
1354 * Process VPN lookup result for record
1356 * @param cls the record lookup handle
1357 * @param rh resolver handle
1358 * @param rd_count number of results (1)
1359 * @param rd record data containing the result
1362 handle_record_vpn (void* cls, struct ResolverHandle *rh,
1363 unsigned int rd_count,
1364 const struct GNUNET_NAMESTORE_RecordData *rd)
1366 struct RecordLookupHandle* rlh = (struct RecordLookupHandle*) cls;
1370 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1371 "GNS_PHASE_REC_VPN-%d: VPN returned no records. (status: %d)!\n",
1374 /* give up, cannot resolve */
1375 finish_lookup(rh, rlh, 0, NULL);
1376 free_resolver_handle(rh);
1380 /* results found yay */
1381 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1382 "GNS_PHASE_REC_VPN-%d: Record resolved from VPN!", rh->id);
1384 finish_lookup(rh, rlh, rd_count, rd);
1386 free_resolver_handle(rh);
1391 * Sends a UDP dns query to a nameserver specified in the rh
1393 * @param rh the resolver handle
1396 send_dns_packet (struct ResolverHandle *rh);
1400 handle_dns_resolver (void *cls,
1401 const struct sockaddr *addr,
1404 struct ResolverHandle *rh = cls;
1405 struct RecordLookupHandle *rlh = rh->proc_cls;
1406 struct GNUNET_NAMESTORE_RecordData rd;
1407 struct sockaddr_in *sai;
1408 struct sockaddr_in6 *sai6;
1412 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1413 "No address found in DNS!\n");
1414 finish_lookup (rh, rlh, 0, NULL);
1415 free_resolver_handle (rh);
1419 if (addrlen == sizeof (struct sockaddr_in))
1421 sai = (struct sockaddr_in*) addr;
1422 rd.record_type = GNUNET_GNS_RECORD_TYPE_A;
1423 rd.data_size = sizeof (struct in_addr);
1424 rd.data = &sai->sin_addr;
1428 sai6 = (struct sockaddr_in6*) addr;
1429 rd.record_type = GNUNET_GNS_RECORD_AAAA;
1430 rd.data_size = sizeof (struct in6_addr);
1431 rd.data = &sai6->sin6_addr;
1434 rd.expiration_time = UINT64_MAX; /* FIXME: should probably pick something shorter */
1437 finish_lookup (rh, rlh, 1, &rd);
1438 GNUNET_RESOLVER_request_cancel (rh->dns_resolver_handle);
1439 free_resolver_handle (rh);
1443 * Resolve DNS name via local stub resolver
1445 * @param rh the resolver handle
1448 resolve_dns_name (struct ResolverHandle *rh)
1450 struct RecordLookupHandle *rlh = rh->proc_cls;
1453 if ((rlh->record_type != GNUNET_GNS_RECORD_TYPE_A) &&
1454 (rlh->record_type != GNUNET_GNS_RECORD_AAAA))
1456 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1457 "Can only resolve A/AAAA via stub... abort\n");
1458 finish_lookup (rh, rlh, 0, NULL);
1459 free_resolver_handle (rh);
1463 if (rlh->record_type == GNUNET_GNS_RECORD_TYPE_A)
1468 //GNUNET_RESOLVER_connect (cfg); FIXME into init
1470 rh->dns_resolver_handle = GNUNET_RESOLVER_ip_get (rh->dns_name,
1473 &handle_dns_resolver,
1479 * Read DNS udp packet from socket
1481 * @param cls the resolver handle
1482 * @param tc task context
1485 read_dns_response (void *cls,
1486 const struct GNUNET_SCHEDULER_TaskContext *tc)
1488 struct ResolverHandle *rh = cls;
1489 struct RecordLookupHandle *rlh = rh->proc_cls;
1490 char buf[UINT16_MAX];
1492 struct sockaddr_in addr;
1494 struct GNUNET_DNSPARSER_Packet *packet;
1495 struct GNUNET_NAMESTORE_RecordData rd;
1496 int found_delegation = GNUNET_NO;
1497 int found_cname = GNUNET_NO;
1498 char* delegation_name = NULL;
1499 int zone_offset = 0;
1502 rh->dns_read_task = GNUNET_SCHEDULER_NO_TASK;
1503 if (0 == (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
1505 /* timeout or shutdown */
1506 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1507 "Terminating DNS query %d\n", tc->reason);
1508 finish_lookup (rh, rlh, 0, NULL);
1509 GNUNET_NETWORK_socket_close (rh->dns_sock);
1510 free_resolver_handle (rh);
1514 addrlen = sizeof (addr);
1515 r = GNUNET_NETWORK_socket_recvfrom (rh->dns_sock,
1517 (struct sockaddr*) &addr,
1522 GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "recvfrom");
1523 finish_lookup (rh, rlh, 0, NULL);
1524 GNUNET_NETWORK_socket_close (rh->dns_sock);
1525 free_resolver_handle (rh);
1529 packet = GNUNET_DNSPARSER_parse (buf, r);
1533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1534 "Failed to parse DNS reply!\n");
1535 finish_lookup (rh, rlh, 0, NULL);
1536 GNUNET_NETWORK_socket_close (rh->dns_sock);
1537 free_resolver_handle (rh);
1541 for (i = 0; i < packet->num_answers; i++)
1543 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1544 "Got record type %d (want %d)\n",
1545 packet->answers[i].type,
1547 /* http://tools.ietf.org/html/rfc1034#section-3.6.2 */
1548 if (packet->answers[i].type == GNUNET_GNS_RECORD_TYPE_CNAME)
1550 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1551 "CNAME... restarting query with %s\n",
1552 packet->answers[i].data.hostname
1554 strcpy (rh->dns_name, packet->answers[i].data.hostname);
1555 found_cname = GNUNET_YES;
1556 //send_dns_packet (rh);
1557 //GNUNET_DNSPARSER_free_packet (packet);
1561 if ((packet->answers[i].type == rlh->record_type) &&
1562 (0 == strcmp (packet->answers[i].name, rh->dns_name)))
1564 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1566 rd.data = packet->answers[i].data.raw.data;
1567 rd.data_size = packet->answers[i].data.raw.data_len;
1568 rd.record_type = packet->answers[i].type;
1570 rd.expiration_time = packet->answers[i].expiration_time.abs_value;
1571 finish_lookup (rh, rlh, 1, &rd);
1572 GNUNET_NETWORK_socket_close (rh->dns_sock);
1573 GNUNET_DNSPARSER_free_packet (packet);
1574 free_resolver_handle (rh);
1579 if (GNUNET_YES == found_cname)
1581 zone_offset = strlen (rh->dns_name) - strlen (rh->dns_zone) - 1;
1583 if (0 > zone_offset)
1586 /* restart query with CNAME */
1587 if (0 == strcmp (rh->dns_name+zone_offset, rh->dns_zone))
1589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1590 "Asking same server for %s\n", rh->dns_name);
1591 send_dns_packet (rh);
1595 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1596 "Trying system resolver for %s\n", rh->dns_name);
1597 resolve_dns_name (rh);
1600 GNUNET_DNSPARSER_free_packet (packet);
1604 for (i = 0; i < packet->num_authority_records; i++)
1607 if (packet->authority_records[i].type == GNUNET_GNS_RECORD_TYPE_NS)
1609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1610 "Found NS delegation!\n");
1611 found_delegation = GNUNET_YES;
1612 delegation_name = packet->authority_records[i].data.hostname;
1617 for (i = 0; i < packet->num_additional_records; i++)
1619 if (found_delegation == GNUNET_NO)
1622 if ((packet->additional_records[i].type == GNUNET_GNS_RECORD_TYPE_A) &&
1623 (0 == strcmp (packet->additional_records[i].name, delegation_name)))
1625 GNUNET_assert (sizeof (struct in_addr) ==
1626 packet->authority_records[i].data.raw.data_len);
1628 rh->dns_addr.sin_addr =
1629 *((struct in_addr*)packet->authority_records[i].data.raw.data);
1630 send_dns_packet (rh);
1631 GNUNET_DNSPARSER_free_packet (packet);
1636 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1637 "Nothing useful in DNS reply!\n");
1638 finish_lookup (rh, rlh, 0, NULL);
1639 GNUNET_NETWORK_socket_close (rh->dns_sock);
1640 free_resolver_handle (rh);
1641 GNUNET_DNSPARSER_free_packet (packet);
1646 * Sends a UDP dns query to a nameserver specified in the rh
1648 * @param rh the request handle
1651 send_dns_packet (struct ResolverHandle *rh)
1653 struct GNUNET_NETWORK_FDSet *rset = GNUNET_NETWORK_fdset_create ();
1654 GNUNET_NETWORK_fdset_set (rset, rh->dns_sock);
1656 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1657 "Sending %dbyte DNS query\n",
1658 rh->dns_raw_packet_size);
1660 GNUNET_NETWORK_socket_sendto (rh->dns_sock,
1662 rh->dns_raw_packet_size,
1663 (struct sockaddr*)&rh->dns_addr,
1664 sizeof (struct sockaddr_in));
1666 rh->dns_read_task = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1667 rh->timeout, //FIXME less?
1673 GNUNET_NETWORK_fdset_destroy (rset);
1678 * The final phase of resoution.
1679 * We found a NS RR and want to resolve via DNS
1681 * @param rh the pending lookup handle
1682 * @param rd_count length of record data
1683 * @param rd record data containing VPN RR
1686 resolve_record_dns (struct ResolverHandle *rh,
1688 const struct GNUNET_NAMESTORE_RecordData *rd)
1690 struct GNUNET_DNSPARSER_Query query;
1691 struct GNUNET_DNSPARSER_Packet packet;
1692 struct GNUNET_DNSPARSER_Flags flags;
1693 struct in_addr dnsip;
1694 struct sockaddr_in addr;
1695 struct sockaddr *sa;
1697 struct RecordLookupHandle *rlh = rh->proc_cls;
1699 memset (&packet, 0, sizeof (struct GNUNET_DNSPARSER_Packet));
1701 /* We cancel here as to not include the ns lookup in the timeout */
1702 if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1704 GNUNET_SCHEDULER_cancel(rh->timeout_task);
1705 rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1707 /* Start shortening */
1708 if ((rh->priv_key != NULL) && is_canonical (rh->name))
1710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1711 "GNS_PHASE_REC_DNS-%llu: Trying to shorten authority chain\n",
1713 start_shorten (rh->authority_chain_tail,
1717 for (i = 0; i < rd_count; i++)
1719 /* Synthesize dns name */
1720 if (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_NS)
1722 strcpy (rh->dns_zone, (char*)rd[i].data);
1723 if (0 == strcmp (rh->name, ""))
1724 strcpy (rh->dns_name, (char*)rd[i].data);
1726 sprintf (rh->dns_name, "%s.%s", rh->name, (char*)rd[i].data);
1729 if (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_A)
1730 dnsip = *((struct in_addr*)rd[i].data);
1733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1734 "GNS_PHASE_REC_DNS-%llu: Looking up %s from %s\n",
1738 rh->dns_sock = GNUNET_NETWORK_socket_create (AF_INET, SOCK_DGRAM, 0);
1739 if (rh->dns_sock == NULL)
1741 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1742 "GNS_PHASE_REC_DNS-%llu: Error creating udp socket for dns!\n",
1744 finish_lookup (rh, rlh, 0, NULL);
1745 free_resolver_handle (rh);
1749 memset (&addr, 0, sizeof (struct sockaddr_in));
1750 sa = (struct sockaddr *) &addr;
1751 sa->sa_family = AF_INET;
1752 if (GNUNET_OK != GNUNET_NETWORK_socket_bind (rh->dns_sock,
1754 sizeof (struct sockaddr_in)))
1756 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1757 "GNS_PHASE_REC_DNS-%llu: Error binding udp socket for dns!\n",
1759 GNUNET_NETWORK_socket_close (rh->dns_sock);
1760 finish_lookup (rh, rlh, 0, NULL);
1761 free_resolver_handle (rh);
1765 /*TODO create dnsparser query, serialize, sendto, handle reply*/
1766 query.name = rh->dns_name;
1767 query.type = rlh->record_type;
1768 query.class = GNUNET_DNSPARSER_CLASS_INTERNET;
1769 memset (&flags, 0, sizeof (flags));
1770 flags.recursion_desired = 1;
1771 flags.checking_disabled = 1;
1772 packet.queries = &query;
1773 packet.answers = NULL;
1774 packet.authority_records = NULL;
1775 packet.num_queries = 1;
1776 packet.num_answers = 0;
1777 packet.num_authority_records = 0;
1778 packet.num_additional_records = 0;
1779 packet.flags = flags;
1781 if (GNUNET_OK != GNUNET_DNSPARSER_pack (&packet,
1783 &rh->dns_raw_packet,
1784 &rh->dns_raw_packet_size))
1786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1787 "GNS_PHASE_REC_DNS-%llu: Creating raw dns packet!\n",
1789 GNUNET_NETWORK_socket_close (rh->dns_sock);
1790 finish_lookup (rh, rlh, 0, NULL);
1791 free_resolver_handle (rh);
1795 rh->dns_addr.sin_family = AF_INET;
1796 rh->dns_addr.sin_port = htons (53); //domain
1797 rh->dns_addr.sin_addr = dnsip;
1798 #if HAVE_SOCKADDR_IN_SIN_LEN
1799 rh->dns_addr.sin_len = (u_char) sizeof (struct sockaddr_in);
1802 send_dns_packet (rh);
1807 * The final phase of resoution.
1808 * We found a VPN RR and want to request an IPv4/6 address
1810 * @param rh the pending lookup handle
1811 * @param rd_count length of record data
1812 * @param rd record data containing VPN RR
1815 resolve_record_vpn (struct ResolverHandle *rh,
1817 const struct GNUNET_NAMESTORE_RecordData *rd)
1819 struct RecordLookupHandle *rlh = rh->proc_cls;
1820 struct GNUNET_HashCode serv_desc;
1821 struct vpn_data* vpn;
1824 /* We cancel here as to not include the ns lookup in the timeout */
1825 if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1827 GNUNET_SCHEDULER_cancel(rh->timeout_task);
1828 rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1830 /* Start shortening */
1831 if ((rh->priv_key != NULL) && is_canonical (rh->name))
1833 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1834 "GNS_PHASE_REC_VPN-%llu: Trying to shorten authority chain\n",
1836 start_shorten (rh->authority_chain_tail,
1840 vpn = (struct vpn_data*)rd->data;
1843 GNUNET_CRYPTO_hash ((char*)&vpn[1],
1844 strlen ((char*)&vpn[1]) + 1,
1846 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1847 "GNS_PHASE_REC_VPN-%llu: proto %hu peer %s!\n",
1850 GNUNET_h2s (&vpn->peer));
1852 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1853 "GNS_PHASE_REC_VPN-%llu: service %s -> %s!\n",
1856 GNUNET_h2s (&serv_desc));
1857 rh->proc = &handle_record_vpn;
1859 if (NULL == vpn_handle)
1861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1862 "GNS_PHASE_REC_VPN-%llu: VPN not connected!\n",
1864 finish_lookup (rh, rh->proc_cls, 0, NULL);
1865 free_resolver_handle (rh);
1869 if (rlh->record_type == GNUNET_GNS_RECORD_TYPE_A)
1875 rh->vpn_handle = GNUNET_VPN_redirect_to_peer (vpn_handle,
1876 af, ntohs (vpn->proto),
1877 (struct GNUNET_PeerIdentity *)&vpn->peer,
1880 GNUNET_TIME_UNIT_FOREVER_ABS, //FIXME
1881 &process_record_result_vpn,
1887 * The final phase of resolution.
1888 * rh->name is a name that is canonical and we do not have a delegation.
1889 * Query namestore for this record
1891 * @param rh the pending lookup handle
1894 resolve_record_ns(struct ResolverHandle *rh)
1896 struct RecordLookupHandle *rlh = (struct RecordLookupHandle *)rh->proc_cls;
1898 /* We cancel here as to not include the ns lookup in the timeout */
1899 if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1901 GNUNET_SCHEDULER_cancel(rh->timeout_task);
1902 rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1904 /* Start shortening */
1905 if ((rh->priv_key != NULL) && is_canonical (rh->name))
1907 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1908 "GNS_PHASE_REC-%llu: Trying to shorten authority chain\n",
1910 start_shorten (rh->authority_chain_tail,
1915 * Try to resolve this record in our namestore.
1916 * The name to resolve is now in rh->authority_name
1917 * since we tried to resolve it to an authority
1920 GNUNET_NAMESTORE_lookup_record(namestore_handle,
1924 &process_record_result_ns,
1931 * Handle timeout for DHT requests
1933 * @param cls the request handle as closure
1934 * @param tc the task context
1937 dht_authority_lookup_timeout(void *cls,
1938 const struct GNUNET_SCHEDULER_TaskContext *tc)
1940 struct ResolverHandle *rh = cls;
1941 struct RecordLookupHandle *rlh = rh->proc_cls;
1942 char new_name[MAX_DNS_NAME_LENGTH];
1944 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1945 "GNS_PHASE_DELEGATE_DHT-%llu: dht lookup for query %s (%ds)timed out.\n",
1946 rh->id, rh->authority_name, rh->timeout.rel_value);
1948 rh->status |= RSL_TIMED_OUT;
1950 rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1952 GNUNET_DHT_get_stop (rh->get_handle);
1953 rh->get_handle = NULL;
1955 if (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN)
1957 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1958 "GNS_PHASE_DELEGATE_DHT-%llu: Got shutdown\n",
1960 rh->proc(rh->proc_cls, rh, 0, NULL);
1964 if (strcmp(rh->name, "") == 0)
1967 * promote authority back to name and try to resolve record
1969 strcpy(rh->name, rh->authority_name);
1970 rh->proc(rh->proc_cls, rh, 0, NULL);
1975 * Start resolution in bg
1977 GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH,
1978 "%s.%s.%s", rh->name, rh->authority_name, GNUNET_GNS_TLD);
1979 //strcpy(new_name, rh->name);
1980 //strcpy(new_name+strlen(new_name), ".");
1981 //memcpy(new_name+strlen(new_name), GNUNET_GNS_TLD, strlen(GNUNET_GNS_TLD));
1983 strcpy(rh->name, new_name);
1985 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1986 "GNS_PHASE_DELEGATE_DHT-%llu: Starting background query for %s type %d\n",
1987 rh->id, rh->name, rlh->record_type);
1989 gns_resolver_lookup_record(rh->authority,
1990 rh->private_local_zone,
1994 GNUNET_TIME_UNIT_FOREVER_REL,
1996 &background_lookup_result_processor,
1999 rh->proc(rh->proc_cls, rh, 0, NULL);
2003 static void resolve_delegation_dht(struct ResolverHandle *rh);
2006 static void resolve_delegation_ns(struct ResolverHandle *rh);
2010 * Namestore resolution for delegation finished. Processing result.
2012 * @param cls the closure
2013 * @param rh resolver handle
2014 * @param rd_count number of results (always 0)
2015 * @param rd record data (always NULL)
2018 handle_delegation_ns(void* cls, struct ResolverHandle *rh,
2019 unsigned int rd_count,
2020 const struct GNUNET_NAMESTORE_RecordData *rd);
2024 * This is a callback function that checks for key revocation
2026 * @param cls the pending query
2027 * @param key the key of the zone we did the lookup
2028 * @param expiration expiration date of the record data set in the namestore
2029 * @param name the name for which we need an authority
2030 * @param rd_count the number of records with 'name'
2031 * @param rd the record data
2032 * @param signature the signature of the authority for the record data
2035 process_pkey_revocation_result_ns (void *cls,
2036 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
2037 struct GNUNET_TIME_Absolute expiration,
2039 unsigned int rd_count,
2040 const struct GNUNET_NAMESTORE_RecordData *rd,
2041 const struct GNUNET_CRYPTO_RsaSignature *signature)
2043 struct ResolverHandle *rh = cls;
2044 struct GNUNET_TIME_Relative remaining_time;
2047 remaining_time = GNUNET_TIME_absolute_get_remaining (expiration);
2049 for (i = 0; i < rd_count; i++)
2051 if (rd[i].record_type == GNUNET_GNS_RECORD_REV)
2053 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2054 "GNS_PHASE_DELEGATE_REV-%llu: Zone has been revoked.\n",
2056 rh->status |= RSL_PKEY_REVOKED;
2057 rh->proc (rh->proc_cls, rh, 0, NULL);
2062 if ((name == NULL) ||
2063 (remaining_time.rel_value == 0))
2065 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2066 "GNS_PHASE_DELEGATE_REV-%llu: + Records don't exist or are expired.\n",
2069 if (rh->timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
2071 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2072 "GNS_PHASE_DELEGATE_REV-%d: Starting background lookup for %s type %d\n",
2073 rh->id, "+.gnunet", GNUNET_GNS_RECORD_REV);
2075 gns_resolver_lookup_record(rh->authority,
2076 rh->private_local_zone,
2077 GNUNET_GNS_RECORD_REV,
2080 GNUNET_TIME_UNIT_FOREVER_REL,
2082 &background_lookup_result_processor,
2086 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2087 "GNS_PHASE_DELEGATE_REV-%llu: Revocation checkpassed\n",
2090 * We are done with PKEY resolution if name is empty
2091 * else resolve again with new authority
2093 if (strcmp (rh->name, "") == 0)
2094 rh->proc (rh->proc_cls, rh, 0, NULL);
2096 resolve_delegation_ns (rh);
2102 * Function called when we get a result from the dht
2103 * for our query. Recursively tries to resolve authorities
2106 * @param cls the request handle
2107 * @param exp lifetime
2108 * @param key the key the record was stored under
2109 * @param get_path get path
2110 * @param get_path_length get path length
2111 * @param put_path put path
2112 * @param put_path_length put path length
2113 * @param type the block type
2114 * @param size the size of the record
2115 * @param data the record data
2118 process_delegation_result_dht(void* cls,
2119 struct GNUNET_TIME_Absolute exp,
2120 const struct GNUNET_HashCode * key,
2121 const struct GNUNET_PeerIdentity *get_path,
2122 unsigned int get_path_length,
2123 const struct GNUNET_PeerIdentity *put_path,
2124 unsigned int put_path_length,
2125 enum GNUNET_BLOCK_Type type,
2126 size_t size, const void *data)
2128 struct ResolverHandle *rh;
2129 struct GNSNameRecordBlock *nrb;
2130 uint32_t num_records;
2132 char* rd_data = (char*) data;
2135 struct GNUNET_CRYPTO_ShortHashCode zone, name_hash;
2136 struct GNUNET_HashCode zone_hash_double, name_hash_double;
2138 rh = (struct ResolverHandle *)cls;
2140 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2141 "GNS_PHASE_DELEGATE_DHT-%llu: Got DHT result\n", rh->id);
2146 nrb = (struct GNSNameRecordBlock*)data;
2148 /* stop dht lookup and timeout task */
2149 GNUNET_DHT_get_stop (rh->get_handle);
2151 rh->get_handle = NULL;
2153 if (rh->dht_heap_node != NULL)
2155 GNUNET_CONTAINER_heap_remove_node(rh->dht_heap_node);
2156 rh->dht_heap_node = NULL;
2159 num_records = ntohl(nrb->rd_count);
2160 name = (char*)&nrb[1];
2162 struct GNUNET_NAMESTORE_RecordData rd[num_records];
2164 rd_data += strlen(name) + 1 + sizeof(struct GNSNameRecordBlock);
2165 rd_size = size - strlen(name) - 1 - sizeof(struct GNSNameRecordBlock);
2167 if (GNUNET_SYSERR == GNUNET_NAMESTORE_records_deserialize (rd_size,
2172 GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
2173 "GNS_PHASE_DELEGATE_DHT-%llu: Error deserializing data!\n",
2178 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2179 "GNS_PHASE_DELEGATE_DHT-%llu: Got name: %s (wanted %s)\n",
2180 rh->id, name, rh->authority_name);
2181 for (i=0; i<num_records; i++)
2184 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2185 "GNS_PHASE_DELEGATE_DHT-%llu: Got name: %s (wanted %s)\n",
2186 rh->id, name, rh->authority_name);
2187 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2188 "GNS_PHASE_DELEGATE_DHT-%llu: Got type: %d (wanted %d)\n",
2189 rh->id, rd[i].record_type, GNUNET_GNS_RECORD_PKEY);
2190 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2191 "GNS_PHASE_DELEGATE_DHT-%llu: Got data length: %d\n",
2192 rh->id, rd[i].data_size);
2193 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2194 "GNS_PHASE_DELEGATE_DHT-%llu: Got flag %d\n",
2195 rh->id, rd[i].flags);
2197 if ((rd[i].record_type == GNUNET_GNS_RECORD_VPN) ||
2198 (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_NS) ||
2199 (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_CNAME))
2202 * This is a VPN,NS,CNAME entry. Let namestore handle this after caching
2204 if (strcmp(rh->name, "") == 0)
2205 strcpy(rh->name, rh->authority_name);
2207 GNUNET_snprintf(rh->name, MAX_DNS_NAME_LENGTH, "%s.%s",
2208 rh->name, rh->authority_name); //FIXME ret
2213 if ((strcmp(name, rh->authority_name) == 0) &&
2214 (rd[i].record_type == GNUNET_GNS_RECORD_PKEY))
2216 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2217 "GNS_PHASE_DELEGATE_DHT-%llu: Authority found in DHT\n",
2220 memcpy(&rh->authority, rd[i].data, sizeof(struct GNUNET_CRYPTO_ShortHashCode));
2221 struct AuthorityChain *auth =
2222 GNUNET_malloc(sizeof(struct AuthorityChain));
2223 auth->zone = rh->authority;
2224 memset(auth->name, 0, strlen(rh->authority_name)+1);
2225 strcpy(auth->name, rh->authority_name);
2226 GNUNET_CONTAINER_DLL_insert (rh->authority_chain_head,
2227 rh->authority_chain_tail,
2230 /** try to import pkey if private key available */
2231 //if (rh->priv_key && is_canonical (rh->name))
2232 // process_discovered_authority(name, auth->zone,
2233 // rh->authority_chain_tail->zone,
2240 GNUNET_CRYPTO_short_hash(name, strlen(name), &name_hash);
2241 GNUNET_CRYPTO_short_hash_double(&name_hash, &name_hash_double);
2242 GNUNET_CRYPTO_hash_xor(key, &name_hash_double, &zone_hash_double);
2243 GNUNET_CRYPTO_short_hash_from_truncation (&zone_hash_double, &zone);
2245 /* Save to namestore */
2246 if (0 != GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_tail->zone,
2249 GNUNET_NAMESTORE_record_put (namestore_handle,
2256 &on_namestore_record_put_result, //cont
2266 * FIXME in this case. should we ask namestore again?
2268 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2269 "GNS_PHASE_DELEGATE_DHT-%llu: Answer from DHT for %s. Yet to resolve: %s\n",
2270 rh->id, rh->authority_name, rh->name);
2272 if (strcmp(rh->name, "") == 0)
2274 /* Start shortening */
2275 if ((rh->priv_key != NULL) && is_canonical (rh->name))
2277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2278 "GNS_PHASE_DELEGATE_DHT-%llu: Trying to shorten authority chain\n",
2280 start_shorten (rh->authority_chain_tail,
2285 rh->proc = &handle_delegation_ns;
2287 /* Check for key revocation and delegate */
2288 GNUNET_NAMESTORE_lookup_record (namestore_handle,
2291 GNUNET_GNS_RECORD_REV,
2292 &process_pkey_revocation_result_ns,
2295 /*if (strcmp(rh->name, "") == 0)
2297 if ((rh->priv_key != NULL) && is_canonical (rh->name))
2299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2300 "GNS_PHASE_DELEGATE_DHT-%llu: Trying to shorten authority chain\n",
2302 start_shorten (rh->authority_chain_tail,
2306 rh->proc(rh->proc_cls, rh, 0, NULL);
2310 rh->proc = &handle_delegation_ns;
2311 resolve_delegation_ns (rh);
2318 * No pkey but name exists
2321 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2322 "GNS_PHASE_DELEGATE_DHT-%llu: Adding %s back to %s\n",
2323 rh->id, rh->authority_name, rh->name);
2324 if (strcmp(rh->name, "") == 0)
2325 strcpy(rh->name, rh->authority_name);
2327 GNUNET_snprintf(rh->name, MAX_DNS_NAME_LENGTH, "%s.%s",
2328 rh->name, rh->authority_name); //FIXME ret
2330 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2331 "GNS_PHASE_DELEGATE_DHT-%llu: %s restored\n", rh->id, rh->name);
2332 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2333 "GNS_PHASE_DELEGATE_DHT-%llu: DHT authority lookup found no match!\n",
2335 rh->proc(rh->proc_cls, rh, 0, NULL);
2338 #define MAX_SOA_LENGTH sizeof(uint32_t)+sizeof(uint32_t)+sizeof(uint32_t)+sizeof(uint32_t)\
2339 +(MAX_DNS_NAME_LENGTH*2)
2340 #define MAX_MX_LENGTH sizeof(uint16_t)+MAX_DNS_NAME_LENGTH
2341 #define MAX_SRV_LENGTH (sizeof(uint16_t)*3)+MAX_DNS_NAME_LENGTH
2345 expand_plus(char* dest, char* src, char* repl)
2348 unsigned int s_len = strlen(src)+1;
2350 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2351 "GNS_POSTPROCESS: Got %s to expand with %s\n", src, repl);
2355 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2356 "GNS_POSTPROCESS: %s to short\n", src);
2358 /* no postprocessing */
2359 memcpy(dest, src, s_len+1);
2363 if (0 == strcmp(src+s_len-3, ".+"))
2365 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2366 "GNS_POSTPROCESS: Expanding .+ in %s\n", src);
2367 memset(dest, 0, s_len+strlen(repl)+strlen(GNUNET_GNS_TLD));
2371 pos += strlen(repl);
2372 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2373 "GNS_POSTPROCESS: Expanded to %s\n", dest);
2377 memcpy(dest, src, s_len+1);
2385 finish_lookup(struct ResolverHandle *rh,
2386 struct RecordLookupHandle* rlh,
2387 unsigned int rd_count,
2388 const struct GNUNET_NAMESTORE_RecordData *rd)
2391 char new_rr_data[MAX_DNS_NAME_LENGTH];
2392 char new_mx_data[MAX_MX_LENGTH];
2393 char new_soa_data[MAX_SOA_LENGTH];
2394 char new_srv_data[MAX_SRV_LENGTH];
2395 struct srv_data *old_srv;
2396 struct srv_data *new_srv;
2397 struct soa_data *old_soa;
2398 struct soa_data *new_soa;
2399 struct GNUNET_NAMESTORE_RecordData p_rd[rd_count];
2402 unsigned int offset;
2404 if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
2406 GNUNET_SCHEDULER_cancel(rh->timeout_task);
2407 rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2411 memcpy(p_rd, rd, rd_count*sizeof(struct GNUNET_NAMESTORE_RecordData));
2413 for (i = 0; i < rd_count; i++)
2416 if (rd[i].record_type != GNUNET_GNS_RECORD_TYPE_NS &&
2417 rd[i].record_type != GNUNET_GNS_RECORD_TYPE_CNAME &&
2418 rd[i].record_type != GNUNET_GNS_RECORD_MX &&
2419 rd[i].record_type != GNUNET_GNS_RECORD_TYPE_SOA &&
2420 rd[i].record_type != GNUNET_GNS_RECORD_TYPE_SRV)
2422 p_rd[i].data = rd[i].data;
2427 * for all those records we 'should'
2428 * also try to resolve the A/AAAA records (RFC1035)
2429 * This is a feature and not important
2432 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2433 "GNS_POSTPROCESS: Postprocessing\n");
2435 if (strcmp(rh->name, "+") == 0)
2436 repl_string = rlh->name;
2438 repl_string = rlh->name+strlen(rh->name)+1;
2441 if (rd[i].record_type == GNUNET_GNS_RECORD_MX)
2443 memcpy (new_mx_data, (char*)rd[i].data, sizeof(uint16_t));
2444 offset = sizeof(uint16_t);
2445 pos = new_mx_data+offset;
2446 expand_plus(pos, (char*)rd[i].data+sizeof(uint16_t),
2448 offset += strlen(new_mx_data+sizeof(uint16_t))+1;
2449 p_rd[i].data = new_mx_data;
2450 p_rd[i].data_size = offset;
2452 else if (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_SRV)
2455 * Prio, weight and port
2457 new_srv = (struct srv_data*)new_srv_data;
2458 old_srv = (struct srv_data*)rd[i].data;
2459 new_srv->prio = old_srv->prio;
2460 new_srv->weight = old_srv->weight;
2461 new_srv->port = old_srv->port;
2462 expand_plus((char*)&new_srv[1], (char*)&old_srv[1],
2464 p_rd[i].data = new_srv_data;
2465 p_rd[i].data_size = sizeof (struct srv_data) + strlen ((char*)&new_srv[1]) + 1;
2467 else if (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_SOA)
2469 /* expand mname and rname */
2470 old_soa = (struct soa_data*)rd[i].data;
2471 new_soa = (struct soa_data*)new_soa_data;
2472 memcpy (new_soa, old_soa, sizeof (struct soa_data));
2473 expand_plus((char*)&new_soa[1], (char*)&old_soa[1], repl_string);
2474 offset = strlen ((char*)&new_soa[1]) + 1;
2475 expand_plus((char*)&new_soa[1] + offset,
2476 (char*)&old_soa[1] + strlen ((char*)&old_soa[1]) + 1,
2478 p_rd[i].data_size = sizeof (struct soa_data)
2480 + strlen ((char*)&new_soa[1] + offset);
2481 p_rd[i].data = new_soa_data;
2486 expand_plus(pos, (char*)rd[i].data, repl_string);
2487 p_rd[i].data_size = strlen(new_rr_data)+1;
2488 p_rd[i].data = new_rr_data;
2493 rlh->proc(rlh->proc_cls, rd_count, p_rd);
2499 * Process DHT lookup result for record.
2501 * @param cls the closure
2502 * @param rh resolver handle
2503 * @param rd_count number of results
2504 * @param rd record data
2507 handle_record_dht(void* cls, struct ResolverHandle *rh,
2508 unsigned int rd_count,
2509 const struct GNUNET_NAMESTORE_RecordData *rd)
2511 struct RecordLookupHandle* rlh;
2513 rlh = (struct RecordLookupHandle*)cls;
2516 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2517 "GNS_PHASE_REC-%d: No records for %s found in DHT. Aborting\n",
2519 /* give up, cannot resolve */
2520 finish_lookup(rh, rlh, 0, NULL);
2521 free_resolver_handle(rh);
2525 /* results found yay */
2526 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2527 "GNS_PHASE_REC-%d: Record resolved from DHT!", rh->id);
2529 finish_lookup(rh, rlh, rd_count, rd);
2530 free_resolver_handle(rh);
2538 * Process namestore lookup result for record.
2540 * @param cls the closure
2541 * @param rh resolver handle
2542 * @param rd_count number of results
2543 * @param rd record data
2546 handle_record_ns (void* cls, struct ResolverHandle *rh,
2547 unsigned int rd_count,
2548 const struct GNUNET_NAMESTORE_RecordData *rd)
2550 struct RecordLookupHandle* rlh;
2551 rlh = (struct RecordLookupHandle*) cls;
2552 int check_dht = GNUNET_YES;
2556 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2557 "GNS_PHASE_REC-%d: NS returned no records. (status: %d)!\n",
2562 * There are 5 conditions that have to met for us to consult the DHT:
2563 * 1. The entry in the DHT is RSL_RECORD_EXPIRED OR
2564 * 2. No entry in the NS existed AND
2565 * 3. The zone queried is not the local resolver's zone AND
2566 * 4. The name that was looked up is '+'
2567 * because if it was any other canonical name we either already queried
2568 * the DHT for the authority in the authority lookup phase (and thus
2569 * would already have an entry in the NS for the record)
2570 * 5. We are not in cache only mode
2572 if (((rh->status & RSL_RECORD_EXPIRED) != 0) &&
2573 ((rh->status & RSL_RECORD_EXISTS) == 0) )
2574 check_dht = GNUNET_NO;
2576 if (0 != GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
2577 &rh->private_local_zone))
2578 check_dht = GNUNET_NO;
2580 if ((strcmp (rh->name, "+") != 0) && (is_srv (rh->name) != 0))
2581 check_dht = GNUNET_NO;
2584 if (rh->only_cached == GNUNET_YES)
2585 check_dht = GNUNET_NO;
2587 if (GNUNET_YES == check_dht)
2589 rh->proc = &handle_record_dht;
2590 resolve_record_dht(rh);
2593 /* give up, cannot resolve */
2594 finish_lookup(rh, rlh, 0, NULL);
2595 free_resolver_handle(rh);
2599 /* results found yay */
2600 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2601 "GNS_PHASE_REC-%d: Record resolved from namestore!", rh->id);
2603 finish_lookup(rh, rlh, rd_count, rd);
2605 free_resolver_handle(rh);
2611 * Move one level up in the domain hierarchy and return the
2612 * passed top level domain.
2614 * @param name the domain
2615 * @param dest the destination where the tld will be put
2618 pop_tld(char* name, char* dest)
2622 if (is_canonical (name))
2629 for (len = strlen(name); len > 0; len--)
2631 if (*(name+len) == '.')
2641 strcpy(dest, (name+len+1));
2645 * Checks if name is in tld
2647 * @param name the name to check
2648 * @param tld the TLD to check for
2649 * @return GNUNET_YES or GNUNET_NO
2652 is_tld(const char* name, const char* tld)
2656 if (strlen(name) <= strlen(tld))
2661 offset = strlen(name)-strlen(tld);
2662 if (strcmp(name+offset, tld) != 0)
2664 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2665 "%s is not in .%s TLD\n", name, tld);
2672 * DHT resolution for delegation finished. Processing result.
2674 * @param cls the closure
2675 * @param rh resolver handle
2676 * @param rd_count number of results (always 0)
2677 * @param rd record data (always NULL)
2680 handle_delegation_dht(void* cls, struct ResolverHandle *rh,
2681 unsigned int rd_count,
2682 const struct GNUNET_NAMESTORE_RecordData *rd)
2684 struct RecordLookupHandle* rlh;
2685 rlh = (struct RecordLookupHandle*) cls;
2688 if (strcmp(rh->name, "") == 0)
2690 if ((rlh->record_type == GNUNET_GNS_RECORD_PKEY))
2692 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2693 "GNS_PHASE_DELEGATE_DHT-%llu: Resolved queried PKEY via DHT.\n",
2695 finish_lookup(rh, rlh, rd_count, rd);
2696 free_resolver_handle(rh);
2699 /* We resolved full name for delegation. resolving record */
2700 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2701 "GNS_PHASE_DELEGATE_DHT-%llu: Resolved full name for delegation via DHT.\n",
2703 strcpy(rh->name, "+\0");
2704 rh->proc = &handle_record_ns;
2705 resolve_record_ns(rh);
2710 * we still have some left
2712 if (is_canonical(rh->name))
2714 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2715 "GNS_PHASE_DELEGATE_DHT-%llu: Resolving canonical record %s in ns\n",
2718 rh->proc = &handle_record_ns;
2719 resolve_record_ns(rh);
2722 /* give up, cannot resolve */
2723 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2724 "GNS_PHASE_DELEGATE_DHT-%llu: Cannot fully resolve delegation for %s via DHT!\n",
2726 finish_lookup(rh, rlh, 0, NULL);
2727 free_resolver_handle(rh);
2732 * Start DHT lookup for a name -> PKEY (compare NS) record in
2733 * rh->authority's zone
2735 * @param rh the pending gns query
2738 resolve_delegation_dht(struct ResolverHandle *rh)
2741 struct GNUNET_CRYPTO_ShortHashCode name_hash;
2742 struct GNUNET_HashCode name_hash_double;
2743 struct GNUNET_HashCode zone_hash_double;
2744 struct GNUNET_HashCode lookup_key;
2745 struct ResolverHandle *rh_heap_root;
2747 pop_tld(rh->name, rh->authority_name);
2748 GNUNET_CRYPTO_short_hash(rh->authority_name,
2749 strlen(rh->authority_name),
2751 GNUNET_CRYPTO_short_hash_double(&name_hash, &name_hash_double);
2752 GNUNET_CRYPTO_short_hash_double(&rh->authority, &zone_hash_double);
2753 GNUNET_CRYPTO_hash_xor(&name_hash_double, &zone_hash_double, &lookup_key);
2755 rh->dht_heap_node = NULL;
2757 if (rh->timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
2759 //rh->timeout_task = GNUNET_SCHEDULER_add_delayed (DHT_LOOKUP_TIMEOUT,
2760 // &dht_authority_lookup_timeout,
2762 rh->timeout_cont = &dht_authority_lookup_timeout;
2763 rh->timeout_cont_cls = rh;
2767 if (max_allowed_background_queries <=
2768 GNUNET_CONTAINER_heap_get_size (dht_lookup_heap))
2770 /* terminate oldest lookup */
2771 rh_heap_root = GNUNET_CONTAINER_heap_remove_root (dht_lookup_heap);
2772 GNUNET_DHT_get_stop(rh_heap_root->get_handle);
2773 rh_heap_root->dht_heap_node = NULL;
2775 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2776 "GNS_PHASE_DELEGATE_DHT-%llu: Replacing oldest background query for %s\n",
2777 rh->id, rh_heap_root->authority_name);
2779 rh_heap_root->proc(rh_heap_root->proc_cls,
2784 rh->dht_heap_node = GNUNET_CONTAINER_heap_insert (dht_lookup_heap,
2786 GNUNET_TIME_absolute_get().abs_value);
2789 xquery = htonl(GNUNET_GNS_RECORD_PKEY);
2791 GNUNET_assert(rh->get_handle == NULL);
2792 rh->get_handle = GNUNET_DHT_get_start(dht_handle,
2793 GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
2795 DHT_GNS_REPLICATION_LEVEL,
2799 &process_delegation_result_dht,
2806 * Namestore resolution for delegation finished. Processing result.
2808 * @param cls the closure
2809 * @param rh resolver handle
2810 * @param rd_count number of results (always 0)
2811 * @param rd record data (always NULL)
2814 handle_delegation_ns (void* cls, struct ResolverHandle *rh,
2815 unsigned int rd_count,
2816 const struct GNUNET_NAMESTORE_RecordData *rd)
2818 struct RecordLookupHandle* rlh;
2819 rlh = (struct RecordLookupHandle*) cls;
2820 int check_dht = GNUNET_YES;
2823 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2824 "GNS_PHASE_DELEGATE_NS-%llu: Resolution status: %d.\n",
2825 rh->id, rh->status);
2827 if (rh->status & RSL_PKEY_REVOKED)
2829 finish_lookup (rh, rlh, 0, NULL);
2830 free_resolver_handle (rh);
2834 if (strcmp(rh->name, "") == 0)
2837 /* We resolved full name for delegation. resolving record */
2838 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2839 "GNS_PHASE_DELEGATE_NS-%llu: Resolved full name for delegation.\n",
2841 if (rh->status & RSL_CNAME_FOUND)
2843 if (rlh->record_type == GNUNET_GNS_RECORD_TYPE_CNAME)
2845 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2846 "GNS_PHASE_DELEGATE_NS-%llu: Resolved queried CNAME in NS.\n",
2848 strcpy (rh->name, rh->authority_name);
2849 finish_lookup (rh, rlh, rd_count, rd);
2850 free_resolver_handle (rh);
2855 if (is_tld ((char*)rd->data, GNUNET_GNS_TLD_PLUS))
2857 s_len = strlen (rd->data) - 2;
2858 memcpy (rh->name, rd->data, s_len);
2859 rh->name[s_len] = '\0';
2860 resolve_delegation_ns (rh);
2863 else if (is_tld ((char*)rd->data, GNUNET_GNS_TLD_ZKEY))
2865 gns_resolver_lookup_record (rh->authority,
2866 rh->private_local_zone,
2875 free_resolver_handle (rh);
2881 strcpy (rh->dns_name, (char*)rd->data);
2882 resolve_dns_name (rh);
2887 else if (rh->status & RSL_DELEGATE_VPN)
2889 if (rlh->record_type == GNUNET_GNS_RECORD_VPN)
2891 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2892 "GNS_PHASE_DELEGATE_NS-%llu: Resolved queried VPNRR in NS.\n",
2894 finish_lookup(rh, rlh, rd_count, rd);
2895 free_resolver_handle(rh);
2898 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2899 "GNS_PHASE_DELEGATE_NS-%llu: VPN delegation starting.\n",
2901 GNUNET_assert (NULL != rd);
2902 rh->proc = &handle_record_vpn;
2903 resolve_record_vpn (rh, rd_count, rd);
2906 else if (rh->status & RSL_DELEGATE_NS)
2908 if (rlh->record_type == GNUNET_GNS_RECORD_TYPE_NS)
2910 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2911 "GNS_PHASE_DELEGATE_NS-%llu: Resolved queried NSRR in NS.\n",
2913 finish_lookup(rh, rlh, rd_count, rd);
2914 free_resolver_handle(rh);
2918 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2919 "GNS_PHASE_DELEGATE_NS-%llu: NS delegation starting.\n",
2921 GNUNET_assert (NULL != rd);
2922 rh->proc = &handle_record_ns;
2923 resolve_record_dns (rh, rd_count, rd);
2926 else if (rh->status & RSL_DELEGATE_PKEY)
2928 if (rh->status & RSL_PKEY_REVOKED)
2930 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2931 "GNS_PHASE_DELEGATE_NS-%llu: Resolved PKEY is revoked.\n",
2933 finish_lookup (rh, rlh, 0, NULL);
2934 free_resolver_handle (rh);
2937 else if (rlh->record_type == GNUNET_GNS_RECORD_PKEY)
2939 GNUNET_assert(rd_count == 1);
2940 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2941 "GNS_PHASE_DELEGATE_NS-%llu: Resolved queried PKEY in NS.\n",
2943 finish_lookup(rh, rlh, rd_count, rd);
2944 free_resolver_handle(rh);
2948 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2949 "GNS_PHASE_DELEGATE_NS-%llu: Resolving record +\n",
2951 strcpy(rh->name, "+\0");
2952 rh->proc = &handle_record_ns;
2953 resolve_record_ns(rh);
2957 if (rh->status & RSL_DELEGATE_NS)
2959 if (rlh->record_type == GNUNET_GNS_RECORD_TYPE_NS)
2961 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2962 "GNS_PHASE_DELEGATE_NS-%llu: Resolved queried NSRR in NS.\n",
2964 finish_lookup(rh, rlh, rd_count, rd);
2965 free_resolver_handle(rh);
2969 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2970 "GNS_PHASE_DELEGATE_NS-%llu: NS delegation starting.\n",
2972 GNUNET_assert (NULL != rd);
2973 rh->proc = &handle_record_ns;
2974 resolve_record_dns (rh, rd_count, rd);
2979 * we still have some left
2980 * check if authority in ns is fresh
2982 * or we are authority
2985 if ((rh->status & RSL_RECORD_EXISTS) &&
2986 !(rh->status & RSL_RECORD_EXPIRED))
2987 check_dht = GNUNET_NO;
2989 if (0 == GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
2990 &rh->private_local_zone))
2991 check_dht = GNUNET_NO;
2993 if (rh->only_cached == GNUNET_YES)
2994 check_dht = GNUNET_NO;
2996 if (check_dht == GNUNET_NO)
2998 if (is_canonical(rh->name))
3000 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3001 "GNS_PHASE_DELEGATE_NS-%llu: Resolving canonical record %s\n",
3004 rh->proc = &handle_record_ns;
3005 resolve_record_ns(rh);
3009 /* give up, cannot resolve */
3010 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3011 "GNS_PHASE_DELEGATE_NS-%llu: Cannot fully resolve delegation for %s!\n",
3014 finish_lookup(rh, rlh, rd_count, rd);
3015 //rlh->proc(rlh->proc_cls, 0, NULL);
3020 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3021 "GNS_PHASE_DELEGATE_NS-%llu: Trying to resolve delegation for %s via DHT\n",
3023 rh->proc = &handle_delegation_dht;
3024 resolve_delegation_dht(rh);
3029 * This is a callback function that should give us only PKEY
3030 * records. Used to query the namestore for the authority (PKEY)
3031 * for 'name'. It will recursively try to resolve the
3032 * authority for a given name from the namestore.
3034 * @param cls the pending query
3035 * @param key the key of the zone we did the lookup
3036 * @param expiration expiration date of the record data set in the namestore
3037 * @param name the name for which we need an authority
3038 * @param rd_count the number of records with 'name'
3039 * @param rd the record data
3040 * @param signature the signature of the authority for the record data
3043 process_delegation_result_ns (void* cls,
3044 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
3045 struct GNUNET_TIME_Absolute expiration,
3047 unsigned int rd_count,
3048 const struct GNUNET_NAMESTORE_RecordData *rd,
3049 const struct GNUNET_CRYPTO_RsaSignature *signature)
3051 struct ResolverHandle *rh;
3052 struct GNUNET_TIME_Relative remaining_time;
3053 struct GNUNET_CRYPTO_ShortHashCode zone;
3054 char new_name[MAX_DNS_NAME_LENGTH];
3056 struct GNUNET_TIME_Absolute et;
3058 rh = (struct ResolverHandle *)cls;
3059 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3060 "GNS_PHASE_DELEGATE_NS-%llu: Got %d records from authority lookup\n",
3063 GNUNET_CRYPTO_short_hash (key,
3064 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
3066 remaining_time = GNUNET_TIME_absolute_get_remaining (expiration);
3072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3073 "GNS_PHASE_DELEGATE_NS-%llu: Records with name %s exist.\n",
3075 rh->status |= RSL_RECORD_EXISTS;
3077 if (remaining_time.rel_value == 0)
3079 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3080 "GNS_PHASE_DELEGATE_NS-%llu: Record set %s expired.\n",
3082 rh->status |= RSL_RECORD_EXPIRED;
3087 * No authority found in namestore.
3092 * We did not find an authority in the namestore
3097 * Promote this authority back to a name maybe it is
3100 if (strcmp (rh->name, "") == 0)
3102 /* simply promote back */
3103 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3104 "GNS_PHASE_DELEGATE_NS-%llu: Promoting %s back to name\n",
3105 rh->id, rh->authority_name);
3106 strcpy (rh->name, rh->authority_name);
3110 /* add back to existing name */
3111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3112 "GNS_PHASE_DELEGATE_NS-%llu: Adding %s back to %s\n",
3113 rh->id, rh->authority_name, rh->name);
3114 GNUNET_snprintf (new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
3115 rh->name, rh->authority_name);
3116 strcpy (rh->name, new_name);
3117 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3118 "GNS_PHASE_DELEGATE_NS-%llu: %s restored\n",
3122 rh->proc (rh->proc_cls, rh, 0, NULL);
3127 * We found an authority that may be able to help us
3128 * move on with query
3129 * Note only 1 pkey should have been returned.. anything else would be strange
3131 for (i=0; i < rd_count;i++)
3135 * A CNAME. Like regular DNS this means the is no other record for this
3138 if (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_CNAME)
3140 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3141 "GNS_PHASE_DELEGATE_NS-%llu: CNAME found.\n",
3144 rh->status |= RSL_CNAME_FOUND;
3145 rh->proc (rh->proc_cls, rh, rd_count, rd);
3152 if (rd[i].record_type == GNUNET_GNS_RECORD_VPN)
3154 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3155 "GNS_PHASE_DELEGATE_NS-%llu: VPN found.\n",
3157 rh->status |= RSL_DELEGATE_VPN;
3158 rh->proc (rh->proc_cls, rh, rd_count, rd);
3164 * FIXME make optional
3166 if (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_NS)
3168 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3169 "GNS_PHASE_DELEGATE_NS-%llu: NS found.\n",
3171 rh->status |= RSL_DELEGATE_NS;
3172 rh->proc (rh->proc_cls, rh, rd_count, rd);
3176 if (rd[i].record_type != GNUNET_GNS_RECORD_PKEY)
3179 rh->status |= RSL_DELEGATE_PKEY;
3181 if ((ignore_pending_records != 0) &&
3182 (rd[i].flags & GNUNET_NAMESTORE_RF_PENDING))
3184 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3185 "GNS_PHASE_DELEGATE_NS-%llu: PKEY for %s is pending user confirmation.\n",
3191 GNUNET_break (0 == (rd[i].flags & GNUNET_NAMESTORE_RF_RELATIVE_EXPIRATION));
3192 et.abs_value = rd[i].expiration_time;
3193 if ((GNUNET_TIME_absolute_get_remaining (et)).rel_value
3196 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3197 "GNS_PHASE_DELEGATE_NS-%llu: This pkey is expired.\n",
3199 if (remaining_time.rel_value == 0)
3201 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3202 "GNS_PHASE_DELEGATE_NS-%llu: This dht entry is expired.\n",
3204 rh->authority_chain_head->fresh = 0;
3205 rh->proc (rh->proc_cls, rh, 0, NULL);
3213 * Resolve rest of query with new authority
3215 GNUNET_assert (rd[i].record_type == GNUNET_GNS_RECORD_PKEY);
3216 memcpy (&rh->authority, rd[i].data,
3217 sizeof (struct GNUNET_CRYPTO_ShortHashCode));
3218 struct AuthorityChain *auth = GNUNET_malloc(sizeof (struct AuthorityChain));
3219 auth->zone = rh->authority;
3220 memset (auth->name, 0, strlen (rh->authority_name)+1);
3221 strcpy (auth->name, rh->authority_name);
3222 GNUNET_CONTAINER_DLL_insert (rh->authority_chain_head,
3223 rh->authority_chain_tail,
3226 /* Check for key revocation and delegate */
3227 GNUNET_NAMESTORE_lookup_record (namestore_handle,
3230 GNUNET_GNS_RECORD_REV,
3231 &process_pkey_revocation_result_ns,
3240 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3241 "GNS_PHASE_DELEGATE_NS-%llu: Authority lookup and no PKEY...\n", rh->id);
3243 * If we have found some records for the LAST label
3244 * we return the results. Else null.
3246 if (strcmp(rh->name, "") == 0)
3248 /* Start shortening */
3249 if ((rh->priv_key != NULL) && is_canonical (rh->name))
3251 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3252 "GNS_PHASE_DELEGATE_NS-%llu: Trying to shorten authority chain\n",
3254 start_shorten (rh->authority_chain_tail,
3257 /* simply promote back */
3258 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3259 "GNS_PHASE_DELEGATE_NS-%llu: Promoting %s back to name\n",
3260 rh->id, rh->authority_name);
3261 strcpy(rh->name, rh->authority_name);
3262 rh->proc(rh->proc_cls, rh, rd_count, rd);
3266 rh->proc(rh->proc_cls, rh, 0, NULL);
3272 * Resolve the delegation chain for the request in our namestore
3274 * @param rh the resolver handle
3277 resolve_delegation_ns (struct ResolverHandle *rh)
3279 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3280 "GNS_PHASE_DELEGATE_NS-%llu: Resolving delegation for %s\n",
3282 pop_tld(rh->name, rh->authority_name);
3283 GNUNET_NAMESTORE_lookup_record(namestore_handle,
3286 GNUNET_GNS_RECORD_ANY,
3287 &process_delegation_result_ns,
3294 * Lookup of a record in a specific zone
3295 * calls lookup result processor on result
3297 * @param zone the root zone
3298 * @param pzone the private local zone
3299 * @param record_type the record type to look up
3300 * @param name the name to look up
3301 * @param key a private key for use with PSEU import (can be NULL)
3302 * @param timeout timeout for resolution
3303 * @param only_cached GNUNET_NO to only check locally not DHT for performance
3304 * @param proc the processor to call on result
3305 * @param cls the closure to pass to proc
3308 gns_resolver_lookup_record (struct GNUNET_CRYPTO_ShortHashCode zone,
3309 struct GNUNET_CRYPTO_ShortHashCode pzone,
3310 uint32_t record_type,
3312 struct GNUNET_CRYPTO_RsaPrivateKey *key,
3313 struct GNUNET_TIME_Relative timeout,
3315 RecordLookupProcessor proc,
3318 struct ResolverHandle *rh;
3319 struct RecordLookupHandle* rlh;
3320 char string_hash[MAX_DNS_LABEL_LENGTH];
3321 char nzkey[MAX_DNS_LABEL_LENGTH];
3322 char* nzkey_ptr = nzkey;
3324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3325 "Starting resolution for %s (type=%d)!\n",
3329 if (is_canonical((char*)name) && (strcmp(GNUNET_GNS_TLD, name) != 0))
3331 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3332 "%s is canonical and not gnunet -> cannot resolve!\n", name);
3337 rlh = GNUNET_malloc(sizeof(struct RecordLookupHandle));
3338 rh = GNUNET_malloc(sizeof (struct ResolverHandle));
3340 rh->authority = zone;
3344 rh->timeout = timeout;
3345 rh->get_handle = NULL;
3346 rh->private_local_zone = pzone;
3347 rh->only_cached = only_cached;
3351 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3352 "No shorten key for resolution\n");
3355 if (timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
3358 * Set timeout for authority lookup phase to 1/2
3360 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3361 "Timeout for lookup set to %ds\n", rh->timeout.rel_value);
3362 rh->timeout_task = GNUNET_SCHEDULER_add_delayed(
3363 GNUNET_TIME_relative_divide(timeout, 2),
3364 &handle_lookup_timeout,
3366 rh->timeout_cont = &dht_authority_lookup_timeout;
3367 rh->timeout_cont_cls = rh;
3371 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "No timeout for query!\n");
3372 rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3375 if (strcmp(GNUNET_GNS_TLD, name) == 0)
3378 * Only 'gnunet' given
3380 strcpy(rh->name, "\0");
3384 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3385 "Checking for TLD...\n");
3386 if (is_zkey_tld(name) == GNUNET_YES)
3388 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3391 * This is a zkey tld
3392 * build hash and use as initial authority
3395 strlen(name)-strlen(GNUNET_GNS_TLD_ZKEY));
3396 memcpy(rh->name, name,
3397 strlen(name)-strlen(GNUNET_GNS_TLD_ZKEY) - 1);
3398 pop_tld(rh->name, string_hash);
3400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3401 "ZKEY is %s!\n", string_hash);
3403 GNUNET_STRINGS_utf8_toupper(string_hash, &nzkey_ptr);
3405 if (GNUNET_OK != GNUNET_CRYPTO_short_hash_from_string(nzkey,
3408 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3409 "Cannot convert ZKEY %s to hash!\n", string_hash);
3419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3422 * Presumably GNUNET tld
3425 strlen(name)-strlen(GNUNET_GNS_TLD));
3426 memcpy(rh->name, name,
3427 strlen(name)-strlen(GNUNET_GNS_TLD) - 1);
3432 * Initialize authority chain
3434 rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
3435 rh->authority_chain_head->prev = NULL;
3436 rh->authority_chain_head->next = NULL;
3437 rh->authority_chain_tail = rh->authority_chain_head;
3438 rh->authority_chain_head->zone = rh->authority;
3441 * Copy original query into lookup handle
3443 rlh->record_type = record_type;
3444 memset(rlh->name, 0, strlen(name) + 1);
3445 strcpy(rlh->name, name);
3447 rlh->proc_cls = cls;
3449 rh->proc = &handle_delegation_ns;
3450 resolve_delegation_ns(rh);
3453 /******** END Record Resolver ***********/
3456 * Callback calles by namestore for a zone to name
3459 * @param cls the closure
3460 * @param zone_key the zone we queried
3461 * @param expire the expiration time of the name
3462 * @param name the name found or NULL
3463 * @param rd_len number of records for the name
3464 * @param rd the record data (PKEY) for the name
3465 * @param signature the signature for the record data
3468 process_zone_to_name_shorten_root (void *cls,
3469 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
3470 struct GNUNET_TIME_Absolute expire,
3472 unsigned int rd_len,
3473 const struct GNUNET_NAMESTORE_RecordData *rd,
3474 const struct GNUNET_CRYPTO_RsaSignature *signature);
3478 * Callback called by namestore for a zone to name
3481 * @param cls the closure
3482 * @param zone_key the zone we queried
3483 * @param expire the expiration time of the name
3484 * @param name the name found or NULL
3485 * @param rd_len number of records for the name
3486 * @param rd the record data (PKEY) for the name
3487 * @param signature the signature for the record data
3490 process_zone_to_name_shorten_shorten (void *cls,
3491 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
3492 struct GNUNET_TIME_Absolute expire,
3494 unsigned int rd_len,
3495 const struct GNUNET_NAMESTORE_RecordData *rd,
3496 const struct GNUNET_CRYPTO_RsaSignature *signature)
3498 struct ResolverHandle *rh = (struct ResolverHandle *)cls;
3499 struct NameShortenHandle* nsh = (struct NameShortenHandle*)rh->proc_cls;
3500 struct AuthorityChain *next_authority;
3502 char result[MAX_DNS_NAME_LENGTH];
3503 char tmp_name[MAX_DNS_NAME_LENGTH];
3506 /* we found a match in our own root zone */
3509 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3510 "result strlen %d\n", strlen(name));
3511 answer_len = strlen(rh->name) + strlen(name) + strlen(GNUNET_GNS_TLD) + 3;
3512 memset(result, 0, answer_len);
3514 if (strlen(rh->name) > 0)
3516 sprintf (result, "%s.%s.%s.%s.%s",
3518 nsh->shorten_zone_name, nsh->private_zone_name,
3523 sprintf (result, "%s.%s.%s.%s", name,
3524 nsh->shorten_zone_name, nsh->private_zone_name,
3528 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3529 "Found shorten result %s\n", result);
3530 if (strlen (nsh->result) > strlen (result))
3531 strcpy (nsh->result, result);
3533 else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3534 nsh->shorten_zone) == 0)
3537 * This is our zone append .gnunet unless name is empty
3538 * (it shouldn't be, usually FIXME what happens if we
3539 * shorten to our zone to a "" record??)
3542 sprintf (result, "%s.%s.%s.%s",
3544 nsh->shorten_zone_name, nsh->private_zone_name,
3546 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3547 "Our zone: Found %s as shorten result\n", result);
3549 if (strlen (nsh->result) > strlen (result))
3550 strcpy (nsh->result, result);
3551 //nsh->proc(nsh->proc_cls, result);
3553 //free_resolver_handle(rh);
3560 * continue with next authority if exists
3562 if ((rh->authority_chain_head->next == NULL))
3564 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3565 "Sending %s as shorten result\n", nsh->result);
3566 nsh->proc(nsh->proc_cls, nsh->result);
3568 free_resolver_handle (rh);
3571 next_authority = rh->authority_chain_head;
3573 GNUNET_snprintf(tmp_name, MAX_DNS_NAME_LENGTH,
3574 "%s.%s", rh->name, next_authority->name);
3576 strcpy(rh->name, tmp_name);
3577 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3578 "No PSEU found for authority %s. Promoting back: %s\n",
3579 next_authority->name, rh->name);
3581 GNUNET_CONTAINER_DLL_remove(rh->authority_chain_head,
3582 rh->authority_chain_tail,
3585 GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3586 &rh->authority_chain_tail->zone,
3587 &rh->authority_chain_head->zone,
3588 &process_zone_to_name_shorten_root,
3593 * Callback calles by namestore for a zone to name
3596 * @param cls the closure
3597 * @param zone_key the zone we queried
3598 * @param expire the expiration time of the name
3599 * @param name the name found or NULL
3600 * @param rd_len number of records for the name
3601 * @param rd the record data (PKEY) for the name
3602 * @param signature the signature for the record data
3605 process_zone_to_name_shorten_private (void *cls,
3606 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
3607 struct GNUNET_TIME_Absolute expire,
3609 unsigned int rd_len,
3610 const struct GNUNET_NAMESTORE_RecordData *rd,
3611 const struct GNUNET_CRYPTO_RsaSignature *signature)
3613 struct ResolverHandle *rh = (struct ResolverHandle *)cls;
3614 struct NameShortenHandle* nsh = (struct NameShortenHandle*)rh->proc_cls;
3615 struct AuthorityChain *next_authority;
3617 char result[MAX_DNS_NAME_LENGTH];
3618 char tmp_name[MAX_DNS_NAME_LENGTH];
3621 /* we found a match in our own root zone */
3624 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3625 "result strlen %d\n", strlen(name));
3626 answer_len = strlen(rh->name) + strlen(name) + strlen(GNUNET_GNS_TLD) + 3;
3627 memset(result, 0, answer_len);
3629 if (strlen(rh->name) > 0)
3631 sprintf (result, "%s.%s.%s", rh->name, name, GNUNET_GNS_TLD);
3635 sprintf (result, "%s.%s", name, GNUNET_GNS_TLD);
3638 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3639 "Found shorten result %s\n", result);
3640 if (strlen (nsh->result) > strlen (result))
3641 strcpy (nsh->result, result);
3643 else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3644 nsh->private_zone) == 0)
3647 * This is our zone append .gnunet unless name is empty
3648 * (it shouldn't be, usually FIXME what happens if we
3649 * shorten to our zone to a "" record??)
3652 sprintf (result, "%s.%s.%s",
3653 rh->name, nsh->private_zone_name, GNUNET_GNS_TLD);
3654 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3655 "Our private zone: Found %s as shorten result %s\n", result);
3656 if (strlen (nsh->result) > strlen (result))
3657 strcpy (nsh->result, result);
3660 if (nsh->shorten_zone != NULL)
3662 /* backtrack authorities for names in priv zone */
3663 GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3665 &rh->authority_chain_head->zone,
3666 &process_zone_to_name_shorten_shorten,
3673 * continue with next authority if exists
3675 if ((rh->authority_chain_head->next == NULL))
3677 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3678 "Sending %s as shorten result\n", nsh->result);
3679 nsh->proc(nsh->proc_cls, nsh->result);
3681 free_resolver_handle(rh);
3684 next_authority = rh->authority_chain_head;
3686 GNUNET_snprintf(tmp_name, MAX_DNS_NAME_LENGTH,
3687 "%s.%s", rh->name, next_authority->name);
3689 strcpy(rh->name, tmp_name);
3690 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3691 "No PSEU found for authority %s. Promoting back: %s\n",
3692 next_authority->name, rh->name);
3694 GNUNET_CONTAINER_DLL_remove(rh->authority_chain_head,
3695 rh->authority_chain_tail,
3698 GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3699 &rh->authority_chain_tail->zone,
3700 &rh->authority_chain_head->zone,
3701 &process_zone_to_name_shorten_root,
3707 * Callback calles by namestore for a zone to name
3710 * @param cls the closure
3711 * @param zone_key the zone we queried
3712 * @param expire the expiration time of the name
3713 * @param name the name found or NULL
3714 * @param rd_len number of records for the name
3715 * @param rd the record data (PKEY) for the name
3716 * @param signature the signature for the record data
3719 process_zone_to_name_shorten_root (void *cls,
3720 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
3721 struct GNUNET_TIME_Absolute expire,
3723 unsigned int rd_len,
3724 const struct GNUNET_NAMESTORE_RecordData *rd,
3725 const struct GNUNET_CRYPTO_RsaSignature *signature)
3727 struct ResolverHandle *rh = (struct ResolverHandle *)cls;
3728 struct NameShortenHandle* nsh = (struct NameShortenHandle*)rh->proc_cls;
3729 struct AuthorityChain *next_authority;
3731 char result[MAX_DNS_NAME_LENGTH];
3732 char tmp_name[MAX_DNS_NAME_LENGTH];
3735 /* we found a match in our own root zone */
3738 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3739 "result strlen %d\n", strlen(name));
3740 answer_len = strlen(rh->name) + strlen(name) + strlen(GNUNET_GNS_TLD) + 3;
3741 memset(result, 0, answer_len);
3743 if (strlen(rh->name) > 0)
3745 sprintf (result, "%s.%s.%s", rh->name, name, GNUNET_GNS_TLD);
3749 sprintf (result, "%s.%s", name, GNUNET_GNS_TLD);
3752 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3753 "Found shorten result %s\n", result);
3754 if (strlen (nsh->result) > strlen (result))
3755 strcpy (nsh->result, result);
3757 else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3758 nsh->root_zone) == 0)
3761 * This is our zone append .gnunet unless name is empty
3762 * (it shouldn't be, usually FIXME what happens if we
3763 * shorten to our zone to a "" record??)
3766 sprintf (result, "%s.%s", rh->name, GNUNET_GNS_TLD);
3767 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3768 "Our zone: Found %s as shorten result\n", result);
3769 if (strlen (nsh->result) > strlen (result))
3770 strcpy (nsh->result, result);
3773 if (nsh->private_zone != NULL)
3775 /* backtrack authorities for names in priv zone */
3776 GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3778 &rh->authority_chain_head->zone,
3779 &process_zone_to_name_shorten_private,
3786 * continue with next authority if exists
3788 if ((rh->authority_chain_head->next == NULL))
3790 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3791 "Sending %s as shorten result\n", nsh->result);
3792 nsh->proc(nsh->proc_cls, nsh->result);
3794 free_resolver_handle(rh);
3797 next_authority = rh->authority_chain_head;
3799 GNUNET_snprintf(tmp_name, MAX_DNS_NAME_LENGTH,
3800 "%s.%s", rh->name, next_authority->name);
3802 strcpy(rh->name, tmp_name);
3803 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3804 "No PSEU found for authority %s. Promoting back: %s\n",
3805 next_authority->name, rh->name);
3807 GNUNET_CONTAINER_DLL_remove(rh->authority_chain_head,
3808 rh->authority_chain_tail,
3811 GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3812 &rh->authority_chain_tail->zone,
3813 &rh->authority_chain_head->zone,
3814 &process_zone_to_name_shorten_root,
3821 * Process result from namestore delegation lookup
3822 * for shorten operation
3824 * @param cls the client shorten handle
3825 * @param rh the resolver handle
3826 * @param rd_count number of results (0)
3827 * @param rd data (NULL)
3830 handle_delegation_ns_shorten (void* cls,
3831 struct ResolverHandle *rh,
3833 const struct GNUNET_NAMESTORE_RecordData *rd)
3835 struct NameShortenHandle *nsh;
3836 char result[MAX_DNS_NAME_LENGTH];
3838 nsh = (struct NameShortenHandle *)cls;
3841 * At this point rh->name contains the part of the name
3842 * that we do not have a PKEY in our namestore to resolve.
3843 * The authority chain in the resolver handle is now
3844 * useful to backtrack if needed
3847 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3848 "PKEY resolved as far as possible in ns up to %s!\n", rh->name);
3849 memset(result, 0, sizeof (result));
3851 if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3852 nsh->root_zone) == 0)
3855 * This is our zone append .gnunet unless name is empty
3856 * (it shouldn't be, usually FIXME what happens if we
3857 * shorten to our zone to a "" record??)
3860 sprintf (result, "%s.%s", rh->name, GNUNET_GNS_TLD);
3861 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3862 "Our zone: Found %s as shorten result\n", result);
3864 if (strlen (nsh->result) > strlen (result))
3865 strcpy (nsh->result, result);
3868 else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3869 nsh->private_zone) == 0)
3872 * This is our zone append .gnunet unless name is empty
3873 * (it shouldn't be, usually FIXME what happens if we
3874 * shorten to our zone to a "" record??)
3877 sprintf (result, "%s.%s.%s",
3878 rh->name, nsh->private_zone_name, GNUNET_GNS_TLD);
3879 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3880 "Our zone: Found %s as shorten result %s\n", result);
3882 if (strlen (nsh->result) > strlen (result))
3883 strcpy (nsh->result, result);
3885 else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3886 nsh->shorten_zone) == 0)
3889 * This is our zone append .gnunet unless name is empty
3890 * (it shouldn't be, usually FIXME what happens if we
3891 * shorten to our zone to a "" record??)
3894 sprintf (result, "%s.%s.%s",
3895 rh->name, nsh->private_zone_name, GNUNET_GNS_TLD);
3896 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3897 "Our zone: Found %s as shorten result\n", result);
3899 if (strlen (nsh->result) > strlen (result))
3900 strcpy (nsh->result, result);
3904 /* backtrack authorities for names */
3905 GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3907 &rh->authority_chain_head->zone,
3908 &process_zone_to_name_shorten_root,
3915 * Callback calles by namestore for a zone to name
3918 * @param cls the closure
3919 * @param zone_key the zone we queried
3920 * @param expire the expiration time of the name
3921 * @param name the name found or NULL
3922 * @param rd_len number of records for the name
3923 * @param rd the record data (PKEY) for the name
3924 * @param signature the signature for the record data
3927 process_zone_to_name_zkey(void *cls,
3928 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
3929 struct GNUNET_TIME_Absolute expire,
3931 unsigned int rd_len,
3932 const struct GNUNET_NAMESTORE_RecordData *rd,
3933 const struct GNUNET_CRYPTO_RsaSignature *signature)
3935 struct ResolverHandle *rh = cls;
3936 struct NameShortenHandle *nsh = rh->proc_cls;
3937 struct GNUNET_CRYPTO_ShortHashAsciiEncoded enc;
3938 char new_name[MAX_DNS_NAME_LENGTH];
3940 /* zkey not in our zone */
3944 * In this case we have not given this PKEY a name (yet)
3945 * It is either just not in our zone or not even cached
3946 * Since we do not know at this point we will not try to shorten
3947 * because PKEY import will happen if the user follows the zkey
3950 GNUNET_CRYPTO_short_hash_to_enc ((struct GNUNET_CRYPTO_ShortHashCode*)rd,
3952 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3953 "No name found for zkey %s returning verbatim!\n", enc);
3954 if (strcmp(rh->name, "") != 0)
3955 GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s.%s",
3956 rh->name, enc, GNUNET_GNS_TLD_ZKEY);
3958 GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
3959 enc, GNUNET_GNS_TLD_ZKEY);
3961 strcpy (nsh->result, new_name);
3963 nsh->proc(nsh->proc_cls, new_name);
3965 free_resolver_handle(rh);
3969 if (strcmp(rh->name, "") != 0)
3970 GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
3973 strcpy(new_name, name);
3975 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3976 "Continue shorten for %s!\n", new_name);
3978 strcpy(rh->name, new_name);
3980 rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
3981 rh->authority_chain_tail = rh->authority_chain_head;
3982 rh->authority_chain_head->zone = rh->authority;
3985 /* Start delegation resolution in our namestore */
3986 resolve_delegation_ns(rh);
3991 * Shorten api from resolver
3993 * @param zone the root zone to use
3994 * @param pzone the private zone to use
3995 * @param szone the shorten zone to use
3996 * @param name the name to shorten
3997 * @param private_zone_name name of the private zone
3998 * @param shorten_zone_name name of the shorten zone
3999 * @param proc the processor to call with result
4000 * @param proc_cls closure to pass to proc
4003 gns_resolver_shorten_name (struct GNUNET_CRYPTO_ShortHashCode *zone,
4004 struct GNUNET_CRYPTO_ShortHashCode *pzone,
4005 struct GNUNET_CRYPTO_ShortHashCode *szone,
4007 const char* private_zone_name,
4008 const char* shorten_zone_name,
4009 ShortenResultProcessor proc,
4012 struct ResolverHandle *rh;
4013 struct NameShortenHandle *nsh;
4014 char string_hash[MAX_DNS_LABEL_LENGTH];
4015 struct GNUNET_CRYPTO_ShortHashCode zkey;
4016 char nzkey[MAX_DNS_LABEL_LENGTH];
4017 char* nzkey_ptr = nzkey;
4020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4021 "Starting shorten for %s!\n", name);
4023 if (is_canonical ((char*)name))
4025 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4026 "%s is canonical. Returning verbatim\n", name);
4027 proc (proc_cls, name);
4031 nsh = GNUNET_malloc (sizeof (struct NameShortenHandle));
4034 nsh->proc_cls = proc_cls;
4035 nsh->root_zone = zone;
4036 nsh->private_zone = pzone;
4037 nsh->shorten_zone = szone;
4038 strcpy (nsh->private_zone_name, private_zone_name);
4039 strcpy (nsh->shorten_zone_name, shorten_zone_name);
4040 strcpy (nsh->result, name);
4042 rh = GNUNET_malloc (sizeof (struct ResolverHandle));
4043 rh->authority = *zone;
4045 rh->priv_key = NULL;
4046 rh->proc = &handle_delegation_ns_shorten;
4049 rh->private_local_zone = *zone;
4051 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4052 "Checking for TLD...\n");
4053 if (is_zkey_tld (name) == GNUNET_YES)
4055 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4058 * This is a zkey tld
4059 * build hash and use as initial authority
4062 memset (rh->name, 0,
4063 strlen (name)-strlen (GNUNET_GNS_TLD_ZKEY));
4064 memcpy (rh->name, name,
4065 strlen(name)-strlen (GNUNET_GNS_TLD_ZKEY) - 1);
4066 pop_tld (rh->name, string_hash);
4068 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4069 "ZKEY is %s!\n", string_hash);
4071 GNUNET_STRINGS_utf8_toupper (string_hash, &nzkey_ptr);
4073 if (GNUNET_OK != GNUNET_CRYPTO_short_hash_from_string (nzkey,
4076 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4077 "Cannot convert ZKEY %s to hash!\n", nzkey);
4080 proc (proc_cls, name);
4084 GNUNET_NAMESTORE_zone_to_name (namestore_handle,
4087 &process_zone_to_name_zkey,
4094 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4097 * Presumably GNUNET tld
4099 memset (rh->name, 0,
4100 strlen (name)-strlen (GNUNET_GNS_TLD));
4101 memcpy (rh->name, name,
4102 strlen (name)-strlen (GNUNET_GNS_TLD) - 1);
4105 rh->authority_chain_head = GNUNET_malloc (sizeof (struct AuthorityChain));
4106 rh->authority_chain_tail = rh->authority_chain_head;
4107 rh->authority_chain_head->zone = *zone;
4110 /* Start delegation resolution in our namestore */
4111 resolve_delegation_ns (rh);
4114 /*********** END NAME SHORTEN ********************/
4118 * Process result from namestore delegation lookup
4119 * for get authority operation
4121 * @param cls the client get auth handle
4122 * @param rh the resolver handle
4123 * @param rd_count number of results (0)
4124 * @param rd data (NULL)
4127 handle_delegation_result_ns_get_auth(void* cls,
4128 struct ResolverHandle *rh,
4130 const struct GNUNET_NAMESTORE_RecordData *rd)
4132 struct GetNameAuthorityHandle* nah;
4133 char result[MAX_DNS_NAME_LENGTH];
4136 nah = (struct GetNameAuthorityHandle*) rh->proc_cls;
4139 * At this point rh->name contains the part of the name
4140 * that we do not have a PKEY in our namestore to resolve.
4141 * The authority chain in the resolver handle is now
4142 * useful to backtrack if needed
4145 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
4146 "PKEY resolved as far as possible in ns up to %s!\n", rh->name);
4148 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
4149 "Building response!\n");
4150 if (is_canonical(rh->name))
4153 * We successfully resolved the authority in the ns
4154 * FIXME for our purposes this is fine
4155 * but maybe we want to have an api that also looks
4156 * into the dht (i.e. option in message)
4158 if (strlen(rh->name) > strlen(nah->name))
4160 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
4161 "Record name longer than original lookup name... odd!\n");
4165 answer_len = strlen(nah->name) - strlen(rh->name)
4166 + strlen(GNUNET_GNS_TLD) + 1;
4167 memset(result, 0, answer_len);
4168 strcpy(result, nah->name + strlen(rh->name) + 1);
4170 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
4171 "Got authority result %s\n", result);
4173 nah->proc(nah->proc_cls, result);
4175 free_resolver_handle(rh);
4179 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
4180 "Unable to resolve authority for remaining %s!\n", rh->name);
4181 nah->proc(nah->proc_cls, "");
4183 free_resolver_handle(rh);
4191 * Tries to resolve the authority for name
4194 * @param zone the root zone to look up for
4195 * @param pzone the private local zone
4196 * @param name the name to lookup up
4197 * @param proc the processor to call when finished
4198 * @param proc_cls the closure to pass to the processor
4201 gns_resolver_get_authority(struct GNUNET_CRYPTO_ShortHashCode zone,
4202 struct GNUNET_CRYPTO_ShortHashCode pzone,
4204 GetAuthorityResultProcessor proc,
4207 struct ResolverHandle *rh;
4208 struct GetNameAuthorityHandle *nah;
4210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4211 "Starting authority resolution for %s!\n", name);
4213 nah = GNUNET_malloc(sizeof (struct GetNameAuthorityHandle));
4214 rh = GNUNET_malloc(sizeof (struct ResolverHandle));
4215 rh->authority = zone;
4217 rh->private_local_zone = pzone;
4219 if (strcmp(GNUNET_GNS_TLD, name) == 0)
4221 strcpy(rh->name, "\0");
4226 strlen(name)-strlen(GNUNET_GNS_TLD));
4227 memcpy(rh->name, name,
4228 strlen(name)-strlen(GNUNET_GNS_TLD) - 1);
4231 memset(nah->name, 0,
4233 strcpy(nah->name, name);
4235 rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
4236 rh->authority_chain_tail = rh->authority_chain_head;
4237 rh->authority_chain_head->zone = zone;
4238 rh->proc = &handle_delegation_result_ns_get_auth;
4239 rh->proc_cls = (void*)nah;
4242 nah->proc_cls = proc_cls;
4244 /* Start delegation resolution in our namestore */
4245 resolve_delegation_ns(rh);
4249 /******** END GET AUTHORITY *************/
4251 /* end of gnunet-service-gns_resolver.c */