2 This file is part of GNUnet.
3 (C) 2009-2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file namestore/namestore_api_common.c
23 * @brief API to access the NAMESTORE service
24 * @author Martin Schanzenbach
25 * @author Matthias Wachs
26 * @author Christian Grothoff
29 #include "gnunet_util_lib.h"
30 #include "gnunet_constants.h"
31 #include "gnunet_signatures.h"
32 #include "gnunet_arm_service.h"
33 #include "gnunet_namestore_service.h"
34 #include "gnunet_dnsparser_lib.h"
35 #include "gnunet_tun_lib.h"
36 #include "namestore.h"
39 #define LOG(kind,...) GNUNET_log_from (kind, "gns-api",__VA_ARGS__)
41 GNUNET_NETWORK_STRUCT_BEGIN
45 * Internal format of a record in the serialized form.
51 * Expiration time for the DNS record; relative or absolute depends
52 * on 'flags', network byte order.
54 uint64_t expiration_time GNUNET_PACKED;
57 * Number of bytes in 'data', network byte order.
59 uint32_t data_size GNUNET_PACKED;
62 * Type of the GNS/DNS record, network byte order.
64 uint32_t record_type GNUNET_PACKED;
67 * Flags for the record, network byte order.
69 uint32_t flags GNUNET_PACKED;
73 GNUNET_NETWORK_STRUCT_END
76 * Convert a UTF-8 string to UTF-8 lowercase
77 * @param src source string
78 * @return converted result
81 GNUNET_NAMESTORE_normalize_string (const char *src)
83 GNUNET_assert (NULL != src);
84 char *res = strdup (src);
86 GNUNET_STRINGS_utf8_tolower(src, &res);
92 * Convert a zone key to a string (for printing debug messages).
93 * This is one of the very few calls in the entire API that is
96 * @param z the zone key
97 * @return string form; will be overwritten by next call to #GNUNET_NAMESTORE_z2s
100 GNUNET_NAMESTORE_z2s (const struct GNUNET_CRYPTO_EccPublicKey *z)
102 static char buf[sizeof (struct GNUNET_CRYPTO_EccPublicKey) * 8];
105 end = GNUNET_STRINGS_data_to_string ((const unsigned char *) z,
106 sizeof (struct GNUNET_CRYPTO_EccPublicKey),
119 * Calculate how many bytes we will need to serialize the given
122 * @param rd_count number of records in the rd array
123 * @param rd array of #GNUNET_NAMESTORE_RecordData with @a rd_count elements
124 * @return the required size to serialize
127 GNUNET_NAMESTORE_records_get_size (unsigned int rd_count,
128 const struct GNUNET_NAMESTORE_RecordData *rd)
133 ret = sizeof (struct NetworkRecord) * rd_count;
134 for (i=0;i<rd_count;i++)
136 GNUNET_assert ((ret + rd[i].data_size) >= ret);
137 ret += rd[i].data_size;
144 * Serialize the given records to the given destination buffer.
146 * @param rd_count number of records in the rd array
147 * @param rd array of #GNUNET_NAMESTORE_RecordData with @a rd_count elements
148 * @param dest_size size of the destination array
149 * @param dest where to write the result
150 * @return the size of serialized records, -1 if records do not fit
153 GNUNET_NAMESTORE_records_serialize (unsigned int rd_count,
154 const struct GNUNET_NAMESTORE_RecordData *rd,
158 struct NetworkRecord rec;
163 for (i=0;i<rd_count;i++)
165 rec.expiration_time = GNUNET_htonll (rd[i].expiration_time);
166 rec.data_size = htonl ((uint32_t) rd[i].data_size);
167 rec.record_type = htonl (rd[i].record_type);
168 rec.flags = htonl (rd[i].flags);
169 if (off + sizeof (rec) > dest_size)
171 memcpy (&dest[off], &rec, sizeof (rec));
173 if (off + rd[i].data_size > dest_size)
175 memcpy (&dest[off], rd[i].data, rd[i].data_size);
176 off += rd[i].data_size;
183 * Compares if two records are equal (ignoring flags such
184 * as authority, private and pending, but not relative vs.
185 * absolute expiration time).
189 * @return #GNUNET_YES if the records are equal or #GNUNET_NO if they are not
192 GNUNET_NAMESTORE_records_cmp (const struct GNUNET_NAMESTORE_RecordData *a,
193 const struct GNUNET_NAMESTORE_RecordData *b)
195 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
196 "Comparing records\n");
197 if (a->record_type != b->record_type)
199 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
200 "Record type %lu != %lu\n", a->record_type, b->record_type);
203 if ((a->expiration_time != b->expiration_time) &&
204 ((a->expiration_time != 0) && (b->expiration_time != 0)))
206 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
207 "Expiration time %llu != %llu\n", a->expiration_time, b->expiration_time);
210 if ((a->flags & GNUNET_NAMESTORE_RF_RCMP_FLAGS)
211 != (b->flags & GNUNET_NAMESTORE_RF_RCMP_FLAGS))
213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
214 "Flags %lu (%lu) != %lu (%lu)\n", a->flags,
215 a->flags & GNUNET_NAMESTORE_RF_RCMP_FLAGS, b->flags,
216 b->flags & GNUNET_NAMESTORE_RF_RCMP_FLAGS);
219 if (a->data_size != b->data_size)
221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
222 "Data size %lu != %lu\n", a->data_size, b->data_size);
225 if (0 != memcmp (a->data, b->data, a->data_size))
227 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
228 "Data contents do not match\n");
231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
232 "Records are equal\n");
238 * Deserialize the given records to the given destination.
240 * @param len size of the serialized record data
241 * @param src the serialized record data
242 * @param rd_count number of records in the rd array
243 * @param dest where to put the data
244 * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
247 GNUNET_NAMESTORE_records_deserialize (size_t len,
249 unsigned int rd_count,
250 struct GNUNET_NAMESTORE_RecordData *dest)
252 struct NetworkRecord rec;
257 for (i=0;i<rd_count;i++)
259 if (off + sizeof (rec) > len)
260 return GNUNET_SYSERR;
261 memcpy (&rec, &src[off], sizeof (rec));
262 dest[i].expiration_time = GNUNET_ntohll (rec.expiration_time);
263 dest[i].data_size = ntohl ((uint32_t) rec.data_size);
264 dest[i].record_type = ntohl (rec.record_type);
265 dest[i].flags = ntohl (rec.flags);
268 if (off + dest[i].data_size > len)
269 return GNUNET_SYSERR;
270 dest[i].data = &src[off];
271 off += dest[i].data_size;
278 * Returns the expiration time of the given block of records. The block
279 * expiration time is the expiration time of the block with smallest
282 * @param rd_count number of records given in @a rd
283 * @param rd array of records
284 * @return absolute expiration time
286 struct GNUNET_TIME_Absolute
287 GNUNET_NAMESTORE_record_get_expiration_time (unsigned int rd_count,
288 const struct GNUNET_NAMESTORE_RecordData *rd)
291 struct GNUNET_TIME_Absolute expire;
292 struct GNUNET_TIME_Absolute at;
293 struct GNUNET_TIME_Relative rt;
296 return GNUNET_TIME_UNIT_ZERO_ABS;
297 expire = GNUNET_TIME_UNIT_FOREVER_ABS;
298 for (c = 0; c < rd_count; c++)
300 if (0 != (rd[c].flags & GNUNET_NAMESTORE_RF_RELATIVE_EXPIRATION))
302 rt.rel_value_us = rd[c].expiration_time;
303 at = GNUNET_TIME_relative_to_absolute (rt);
307 at.abs_value_us = rd[c].expiration_time;
309 expire = GNUNET_TIME_absolute_min (at, expire);
316 * Derive session key and iv from label and public key.
318 * @param iv initialization vector to initialize
319 * @param skey session key to initialize
320 * @param label label to use for KDF
321 * @param pub public key to use for KDF
324 derive_block_aes_key (struct GNUNET_CRYPTO_AesInitializationVector *iv,
325 struct GNUNET_CRYPTO_AesSessionKey *skey,
327 const struct GNUNET_CRYPTO_EccPublicKey *pub)
329 static const char ctx_key[] = "gns-aes-ctx-key";
330 static const char ctx_iv[] = "gns-aes-ctx-iv";
332 GNUNET_CRYPTO_kdf (skey, sizeof (struct GNUNET_CRYPTO_AesSessionKey),
333 pub, sizeof (struct GNUNET_CRYPTO_EccPublicKey),
334 label, strlen (label),
335 ctx_key, strlen (ctx_key),
337 GNUNET_CRYPTO_kdf (iv, sizeof (struct GNUNET_CRYPTO_AesInitializationVector),
338 pub, sizeof (struct GNUNET_CRYPTO_EccPublicKey),
339 label, strlen (label),
340 ctx_iv, strlen (ctx_iv),
346 * Sign name and records
348 * @param key the private key
349 * @param expire block expiration
350 * @param label the name for the records
351 * @param rd record data
352 * @param rd_count number of records
353 * @return NULL on error (block too large)
355 struct GNUNET_NAMESTORE_Block *
356 GNUNET_NAMESTORE_block_create (const struct GNUNET_CRYPTO_EccPrivateKey *key,
357 struct GNUNET_TIME_Absolute expire,
359 const struct GNUNET_NAMESTORE_RecordData *rd,
360 unsigned int rd_count)
362 size_t payload_len = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
363 char payload[sizeof (uint32_t) + payload_len];
364 struct GNUNET_NAMESTORE_Block *block;
365 struct GNUNET_CRYPTO_EccPublicKey pkey;
366 struct GNUNET_CRYPTO_EccPrivateKey *dkey;
367 struct GNUNET_CRYPTO_AesInitializationVector iv;
368 struct GNUNET_CRYPTO_AesSessionKey skey;
369 uint32_t rd_count_nbo;
371 if (payload_len > GNUNET_NAMESTORE_MAX_VALUE_SIZE)
373 rd_count_nbo = htonl (rd_count);
374 memcpy (payload, &rd_count_nbo, sizeof (uint32_t));
375 GNUNET_assert (payload_len ==
376 GNUNET_NAMESTORE_records_serialize (rd_count, rd,
377 payload_len, &payload[sizeof (uint32_t)]));
378 block = GNUNET_malloc (sizeof (struct GNUNET_NAMESTORE_Block) +
379 sizeof (uint32_t) + payload_len);
380 block->purpose.size = htonl (sizeof (uint32_t) + payload_len +
381 sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) +
382 sizeof (struct GNUNET_TIME_AbsoluteNBO));
383 block->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_GNS_RECORD_SIGN);
384 block->expiration_time = GNUNET_TIME_absolute_hton (expire);
385 dkey = GNUNET_CRYPTO_ecc_key_derive (key,
388 GNUNET_CRYPTO_ecc_key_get_public (dkey,
389 &block->derived_key);
390 GNUNET_CRYPTO_ecc_key_get_public (key,
392 derive_block_aes_key (&iv, &skey, label, &pkey);
393 GNUNET_break (payload_len + sizeof (uint32_t) ==
394 GNUNET_CRYPTO_aes_encrypt (payload, payload_len + sizeof (uint32_t),
398 GNUNET_CRYPTO_ecc_sign (dkey,
411 * Check if a signature is valid. This API is used by the GNS Block
412 * to validate signatures received from the network.
414 * @param block block to verify
415 * @return #GNUNET_OK if the signature is valid
418 GNUNET_NAMESTORE_block_verify (const struct GNUNET_NAMESTORE_Block *block)
420 return GNUNET_CRYPTO_ecc_verify (GNUNET_SIGNATURE_PURPOSE_GNS_RECORD_SIGN,
423 &block->derived_key);
430 * @param block block to decrypt
431 * @param zone_key public key of the zone
432 * @param label the name for the records
433 * @param proc function to call with the result
434 * @param proc_cls closure for proc
435 * @return #GNUNET_OK on success, #GNUNET_SYSERR if the block was
439 GNUNET_NAMESTORE_block_decrypt (const struct GNUNET_NAMESTORE_Block *block,
440 const struct GNUNET_CRYPTO_EccPublicKey *zone_key,
442 GNUNET_NAMESTORE_RecordCallback proc,
445 size_t payload_len = ntohl (block->purpose.size) -
446 sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) -
447 sizeof (struct GNUNET_TIME_AbsoluteNBO);
448 struct GNUNET_CRYPTO_AesInitializationVector iv;
449 struct GNUNET_CRYPTO_AesSessionKey skey;
451 if (ntohl (block->purpose.size) <
452 sizeof (struct GNUNET_CRYPTO_EccSignaturePurpose) -
453 sizeof (struct GNUNET_TIME_AbsoluteNBO))
456 return GNUNET_SYSERR;
458 derive_block_aes_key (&iv, &skey, label, zone_key);
460 char payload[payload_len];
463 GNUNET_break (payload_len ==
464 GNUNET_CRYPTO_aes_decrypt (&block[1], payload_len,
470 rd_count = ntohl (rd_count);
473 /* limit to sane value */
475 return GNUNET_SYSERR;
478 struct GNUNET_NAMESTORE_RecordData rd[rd_count];
481 GNUNET_NAMESTORE_records_deserialize (payload_len - sizeof (uint32_t),
482 &payload[sizeof (uint32_t)],
487 return GNUNET_SYSERR;
489 proc (proc_cls, rd_count, rd);
497 * Convert the 'value' of a record to a string.
499 * @param type type of the record
500 * @param data value in binary encoding
501 * @param data_size number of bytes in data
502 * @return NULL on error, otherwise human-readable representation of the value
505 GNUNET_NAMESTORE_value_to_string (uint32_t type,
510 const struct GNUNET_TUN_DnsSoaRecord *soa;
511 const struct GNUNET_TUN_GnsVpnRecord *vpn;
512 const struct GNUNET_TUN_DnsSrvRecord *srv;
513 const struct GNUNET_TUN_DnsTlsaRecord *tlsa;
514 struct GNUNET_CRYPTO_HashAsciiEncoded s_peer;
520 const char* soa_rname;
521 const char* soa_mname;
522 char tmp[INET6_ADDRSTRLEN];
528 case GNUNET_DNSPARSER_TYPE_A:
529 if (data_size != sizeof (struct in_addr))
531 if (NULL == inet_ntop (AF_INET, data, tmp, sizeof (tmp)))
533 return GNUNET_strdup (tmp);
534 case GNUNET_DNSPARSER_TYPE_NS:
535 return GNUNET_strndup (data, data_size);
536 case GNUNET_DNSPARSER_TYPE_CNAME:
537 return GNUNET_strndup (data, data_size);
538 case GNUNET_DNSPARSER_TYPE_SOA:
539 if (data_size <= sizeof (struct GNUNET_TUN_DnsSoaRecord))
542 soa_rname = (const char*) &soa[1];
543 soa_mname = memchr (soa_rname, 0, data_size - sizeof (struct GNUNET_TUN_DnsSoaRecord) - 1);
544 if (NULL == soa_mname)
547 if (NULL == memchr (soa_mname, 0,
548 data_size - (sizeof (struct GNUNET_TUN_DnsSoaRecord) + strlen (soa_rname) + 1)))
550 GNUNET_asprintf (&result,
551 "rname=%s mname=%s %lu,%lu,%lu,%lu,%lu",
552 soa_rname, soa_mname,
554 ntohl (soa->refresh),
557 ntohl (soa->minimum));
559 case GNUNET_DNSPARSER_TYPE_PTR:
560 return GNUNET_strndup (data, data_size);
561 case GNUNET_DNSPARSER_TYPE_MX:
562 mx_pref = ntohs(*((uint16_t*)data));
563 if (GNUNET_asprintf(&result, "%hu,%s", mx_pref, data+sizeof(uint16_t))
568 GNUNET_free (result);
571 case GNUNET_DNSPARSER_TYPE_TXT:
572 return GNUNET_strndup (data, data_size);
573 case GNUNET_DNSPARSER_TYPE_AAAA:
574 if (data_size != sizeof (struct in6_addr))
576 if (NULL == inet_ntop (AF_INET6, data, tmp, sizeof (tmp)))
578 return GNUNET_strdup (tmp);
579 case GNUNET_NAMESTORE_TYPE_PKEY:
580 if (data_size != sizeof (struct GNUNET_CRYPTO_EccPublicKey))
582 return GNUNET_CRYPTO_ecc_public_key_to_string (data);
583 case GNUNET_NAMESTORE_TYPE_PSEU:
584 return GNUNET_strndup (data, data_size);
585 case GNUNET_NAMESTORE_TYPE_LEHO:
586 return GNUNET_strndup (data, data_size);
587 case GNUNET_NAMESTORE_TYPE_VPN:
589 if ( (data_size <= sizeof (struct GNUNET_TUN_GnsVpnRecord)) ||
590 ('\0' != cdata[data_size - 1]) )
591 return NULL; /* malformed */
593 GNUNET_CRYPTO_hash_to_enc (&vpn->peer.hashPubKey, &s_peer);
594 if (0 == GNUNET_asprintf (&vpn_str, "%u %s %s",
595 (unsigned int) ntohs (vpn->proto),
596 (const char*) &s_peer,
597 (const char*) &vpn[1]))
599 GNUNET_free (vpn_str);
603 case GNUNET_DNSPARSER_TYPE_SRV:
605 if ( (data_size <= sizeof (struct GNUNET_TUN_DnsSrvRecord)) ||
606 ('\0' != cdata[data_size - 1]) )
607 return NULL; /* malformed */
610 if (0 == GNUNET_asprintf (&srv_str,
615 (const char *)&srv[1]))
617 GNUNET_free (srv_str);
621 case GNUNET_DNSPARSER_TYPE_TLSA:
623 if ( (data_size <= sizeof (struct GNUNET_TUN_DnsTlsaRecord)) ||
624 ('\0' != cdata[data_size - 1]) )
625 return NULL; /* malformed */
627 if (0 == GNUNET_asprintf (&tlsa_str,
632 (const char *) &tlsa[1]))
634 GNUNET_free (tlsa_str);
641 GNUNET_break (0); // not implemented
647 * Convert human-readable version of a 'value' of a record to the binary
650 * @param type type of the record
651 * @param s human-readable string
652 * @param data set to value in binary encoding (will be allocated)
653 * @param data_size set to number of bytes in data
654 * @return GNUNET_OK on success
657 GNUNET_NAMESTORE_string_to_value (uint32_t type,
662 struct in_addr value_a;
663 struct in6_addr value_aaaa;
664 struct GNUNET_CRYPTO_EccPublicKey pkey;
665 struct GNUNET_TUN_DnsSoaRecord *soa;
666 struct GNUNET_TUN_GnsVpnRecord *vpn;
667 struct GNUNET_TUN_DnsTlsaRecord *tlsa;
668 char result[253 + 1];
669 char soa_rname[253 + 1];
670 char soa_mname[253 + 1];
671 char s_peer[103 + 1];
672 char s_serv[253 + 1];
673 unsigned int soa_serial;
674 unsigned int soa_refresh;
675 unsigned int soa_retry;
676 unsigned int soa_expire;
677 unsigned int soa_min;
683 return GNUNET_SYSERR;
687 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
688 _("Unsupported record type %d\n"),
690 return GNUNET_SYSERR;
691 case GNUNET_DNSPARSER_TYPE_A:
692 if (1 != inet_pton (AF_INET, s, &value_a))
694 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
695 _("Unable to parse IPv4 address `%s'\n"),
697 return GNUNET_SYSERR;
699 *data = GNUNET_malloc (sizeof (struct in_addr));
700 memcpy (*data, &value_a, sizeof (value_a));
701 *data_size = sizeof (value_a);
703 case GNUNET_DNSPARSER_TYPE_NS:
704 *data = GNUNET_strdup (s);
705 *data_size = strlen (s) + 1;
707 case GNUNET_DNSPARSER_TYPE_CNAME:
708 *data = GNUNET_strdup (s);
709 *data_size = strlen (s) + 1;
711 case GNUNET_DNSPARSER_TYPE_SOA:
713 "rname=%253s mname=%253s %u,%u,%u,%u,%u",
714 soa_rname, soa_mname,
715 &soa_serial, &soa_refresh, &soa_retry, &soa_expire, &soa_min))
717 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
718 _("Unable to parse SOA record `%s'\n"),
720 return GNUNET_SYSERR;
722 *data_size = sizeof (struct GNUNET_TUN_DnsSoaRecord)+strlen(soa_rname)+strlen(soa_mname)+2;
723 *data = GNUNET_malloc (*data_size);
724 soa = (struct GNUNET_TUN_DnsSoaRecord*)*data;
725 soa->serial = htonl(soa_serial);
726 soa->refresh = htonl(soa_refresh);
727 soa->retry = htonl(soa_retry);
728 soa->expire = htonl(soa_expire);
729 soa->minimum = htonl(soa_min);
730 strcpy((char*)&soa[1], soa_rname);
731 strcpy((char*)&soa[1]+strlen(*data)+1, soa_mname);
733 case GNUNET_DNSPARSER_TYPE_PTR:
734 *data = GNUNET_strdup (s);
735 *data_size = strlen (s);
737 case GNUNET_DNSPARSER_TYPE_MX:
738 if (2 != SSCANF(s, "%hu,%253s", &mx_pref, result))
740 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
741 _("Unable to parse MX record `%s'\n"),
743 return GNUNET_SYSERR;
745 *data_size = sizeof (uint16_t)+strlen(result)+1;
746 *data = GNUNET_malloc (*data_size);
747 mx_pref_n = htons(mx_pref);
748 memcpy(*data, &mx_pref_n, sizeof (uint16_t));
749 strcpy((*data)+sizeof (uint16_t), result);
751 case GNUNET_DNSPARSER_TYPE_TXT:
752 *data = GNUNET_strdup (s);
753 *data_size = strlen (s);
755 case GNUNET_DNSPARSER_TYPE_AAAA:
756 if (1 != inet_pton (AF_INET6, s, &value_aaaa))
758 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
759 _("Unable to parse IPv6 address `%s'\n"),
761 return GNUNET_SYSERR;
763 *data = GNUNET_malloc (sizeof (struct in6_addr));
764 *data_size = sizeof (struct in6_addr);
765 memcpy (*data, &value_aaaa, sizeof (value_aaaa));
767 case GNUNET_NAMESTORE_TYPE_PKEY:
769 GNUNET_CRYPTO_ecc_public_key_from_string (s, strlen (s), &pkey))
771 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
772 _("Unable to parse PKEY record `%s'\n"),
774 return GNUNET_SYSERR;
776 *data = GNUNET_new (struct GNUNET_CRYPTO_EccPublicKey);
777 memcpy (*data, &pkey, sizeof (pkey));
778 *data_size = sizeof (struct GNUNET_CRYPTO_EccPublicKey);
780 case GNUNET_NAMESTORE_TYPE_PSEU:
781 *data = GNUNET_strdup (s);
782 *data_size = strlen (s);
784 case GNUNET_NAMESTORE_TYPE_LEHO:
785 *data = GNUNET_strdup (s);
786 *data_size = strlen (s);
788 case GNUNET_NAMESTORE_TYPE_VPN:
789 if (3 != SSCANF (s,"%u %103s %253s",
790 &proto, s_peer, s_serv))
792 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
793 _("Unable to parse VPN record string `%s'\n"),
795 return GNUNET_SYSERR;
797 *data_size = sizeof (struct GNUNET_TUN_GnsVpnRecord) + strlen (s_serv) + 1;
798 *data = vpn = GNUNET_malloc (*data_size);
799 if (GNUNET_OK != GNUNET_CRYPTO_hash_from_string ((char*)&s_peer,
800 &vpn->peer.hashPubKey))
804 return GNUNET_SYSERR;
806 vpn->proto = htons ((uint16_t) proto);
807 strcpy ((char*)&vpn[1], s_serv);
809 case GNUNET_DNSPARSER_TYPE_TLSA:
810 *data_size = sizeof (struct GNUNET_TUN_DnsTlsaRecord) + strlen (s) - 6;
811 *data = tlsa = GNUNET_malloc (*data_size);
812 if (4 != SSCANF (s, "%c %c %c %s",
815 &tlsa->matching_type,
818 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
819 _("Unable to parse TLSA record string `%s'\n"),
823 return GNUNET_SYSERR;
827 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
828 _("Unsupported record type %d\n"),
830 return GNUNET_SYSERR;
836 * Mapping of record type numbers to human-readable
843 { "A", GNUNET_DNSPARSER_TYPE_A },
844 { "NS", GNUNET_DNSPARSER_TYPE_NS },
845 { "CNAME", GNUNET_DNSPARSER_TYPE_CNAME },
846 { "SOA", GNUNET_DNSPARSER_TYPE_SOA },
847 { "PTR", GNUNET_DNSPARSER_TYPE_PTR },
848 { "MX", GNUNET_DNSPARSER_TYPE_MX },
849 { "TXT", GNUNET_DNSPARSER_TYPE_TXT },
850 { "AAAA", GNUNET_DNSPARSER_TYPE_AAAA },
851 { "PKEY", GNUNET_NAMESTORE_TYPE_PKEY },
852 { "PSEU", GNUNET_NAMESTORE_TYPE_PSEU },
853 { "LEHO", GNUNET_NAMESTORE_TYPE_LEHO },
854 { "VPN", GNUNET_NAMESTORE_TYPE_VPN },
855 { "TLSA", GNUNET_DNSPARSER_TYPE_TLSA },
861 * Convert a type name (i.e. "AAAA") to the corresponding number.
863 * @param typename name to convert
864 * @return corresponding number, UINT32_MAX on error
867 GNUNET_NAMESTORE_typename_to_number (const char *typename)
872 while ( (name_map[i].name != NULL) &&
873 (0 != strcasecmp (typename, name_map[i].name)) )
875 return name_map[i].number;
880 * Convert a type number (i.e. 1) to the corresponding type string (i.e. "A")
882 * @param type number of a type to convert
883 * @return corresponding typestring, NULL on error
886 GNUNET_NAMESTORE_number_to_typename (uint32_t type)
891 while ( (name_map[i].name != NULL) &&
892 (type != name_map[i].number) )
894 return name_map[i].name;
899 * Test if a given record is expired.
901 * @return #GNUNET_YES if the record is expired,
905 GNUNET_NAMESTORE_is_expired (const struct GNUNET_NAMESTORE_RecordData *rd)
907 struct GNUNET_TIME_Absolute at;
909 if (0 != (rd->flags & GNUNET_NAMESTORE_RF_RELATIVE_EXPIRATION))
911 at.abs_value_us = rd->expiration_time;
912 return (0 == GNUNET_TIME_absolute_get_remaining (at).rel_value_us) ? GNUNET_YES : GNUNET_NO;
917 * Calculate the DHT query for a given @a label in a given @a zone.
919 * @param zone private key of the zone
920 * @param label label of the record
921 * @param query hash to use for the query
924 GNUNET_NAMESTORE_query_from_private_key (const struct GNUNET_CRYPTO_EccPrivateKey *zone,
926 struct GNUNET_HashCode *query)
928 struct GNUNET_CRYPTO_EccPublicKey pub;
930 GNUNET_CRYPTO_ecc_key_get_public (zone, &pub);
931 GNUNET_NAMESTORE_query_from_public_key (&pub, label, query);
936 * Calculate the DHT query for a given @a label in a given @a zone.
938 * @param pub public key of the zone
939 * @param label label of the record
940 * @param query hash to use for the query
943 GNUNET_NAMESTORE_query_from_public_key (const struct GNUNET_CRYPTO_EccPublicKey *pub,
945 struct GNUNET_HashCode *query)
947 struct GNUNET_CRYPTO_EccPublicKey pd;
949 GNUNET_CRYPTO_ecc_public_key_derive (pub, label, "gns", &pd);
950 GNUNET_CRYPTO_hash (&pd, sizeof (pd), query);
954 /* end of namestore_common.c */