src/gns/gnunet-service-gns_resolver.c

   1 /*
   2      This file is part of GNUnet.
   3      (C) 2009, 2010, 2011 Christian Grothoff (and other contributing authors)
   4
   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.
   9
  10      GNUnet is distributed in the hope that it will be useful, but
  11      WITHOUT ANY WARRANTY; without even the implied warranty of
  12      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13      General Public License for more details.
  14
  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.
  19 */
  20
  21 /**
  22  *
  23  *
  24  * @file gns/gnunet-service-gns_resolver.c
  25  * @brief GNUnet GNS resolver logic
  26  * @author Martin Schanzenbach
  27  */
  28 #include "platform.h"
  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_dnsparser_lib.h"
  37 #include "gnunet_gns_service.h"
  38 #include "block_gns.h"
  39 #include "gns.h"
  40 #include "gnunet-service-gns_resolver.h"
  41
  42 #define DHT_LOOKUP_TIMEOUT DHT_OPERATION_TIMEOUT
  43 #define DHT_GNS_REPLICATION_LEVEL 5
  44 #define MAX_DNS_LABEL_LENGTH 63
  45
  46
  47 /**
  48  * Our handle to the namestore service
  49  */
  50 static struct GNUNET_NAMESTORE_Handle *namestore_handle;
  51
  52 /**
  53  * Our handle to the vpn service
  54  */
  55 static struct GNUNET_VPN_Handle *vpn_handle;
  56
  57 /**
  58  * Resolver handle to the dht
  59  */
  60 static struct GNUNET_DHT_Handle *dht_handle;
  61
  62 /**
  63  * Heap for parallel DHT lookups
  64  */
  65 static struct GNUNET_CONTAINER_Heap *dht_lookup_heap;
  66
  67 /**
  68  * Maximum amount of parallel queries in background
  69  */
  70 static unsigned long long max_allowed_background_queries;
  71
  72 /**
  73  * Wheather or not to ignore pending records
  74  */
  75 static int ignore_pending_records;
  76
  77 /**
  78  * Our local zone
  79  */
  80 static struct GNUNET_CRYPTO_ShortHashCode local_zone;
  81
  82 /**
  83  * a resolution identifier pool variable
  84  * FIXME overflow?
  85  * This is a non critical identifier useful for debugging
  86  */
  87 static unsigned long long rid = 0;
  88
  89
  90 /**
  91  * Determine if this name is canonical.
  92  * i.e.
  93  * a.b.gnunet  = not canonical
  94  * a           = canonical
  95  *
  96  * @param name the name to test
  97  * @return 1 if canonical
  98  */
  99 static int
 100 is_canonical(char* name)
 101 {
 102   uint32_t len = strlen(name);
 103   int i;
 104
 105   for (i=0; i<len; i++)
 106   {
 107     if (*(name+i) == '.')
 108       return 0;
 109   }
 110   return 1;
 111 }
 112
 113
 114 /**
 115  * Callback that shortens authorities
 116  *
 117  * @param gph the handle containing the name to shorten
 118  */
 119 static void
 120 shorten_authority_chain (struct GetPseuAuthorityHandle *gph);
 121
 122
 123 /**
 124  * Namestore calls this function if we have record for this name.
 125  * (or with rd_count=0 to indicate no matches)
 126  *
 127  * @param cls the pending query
 128  * @param key the key of the zone we did the lookup
 129  * @param expiration expiration date of the namestore entry
 130  * @param name the name for which we need an authority
 131  * @param rd_count the number of records with 'name'
 132  * @param rd the record data
 133  * @param signature the signature of the authority for the record data
 134  */
 135 static void
 136 process_pseu_lookup_ns (void* cls,
 137                       const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
 138                       struct GNUNET_TIME_Absolute expiration,
 139                       const char *name, unsigned int rd_count,
 140                       const struct GNUNET_NAMESTORE_RecordData *rd,
 141                       const struct GNUNET_CRYPTO_RsaSignature *signature)
 142 {
 143   struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
 144   struct GNUNET_NAMESTORE_RecordData new_pkey;
 145   struct AuthorityChain *iter;
 146
 147   if (rd_count > 0)
 148   {
 149     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 150                "GNS_AUTO_PSEU: Name %s already taken in NS!\n", name);
 151     if (0 == strcmp (gph->name, name))
 152     {
 153       if (gph->ahead->next != NULL)
 154       {
 155         if (GNUNET_CRYPTO_short_hash_cmp (&gph->ahead->next->zone,
 156                                           &gph->our_zone))
 157         {
 158           GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "GNS_GET_AUTH: trying next!\n");
 159           iter = gph->ahead->next;
 160           GNUNET_free (gph->ahead);
 161           gph->ahead = iter;
 162           shorten_authority_chain (gph);
 163           return;
 164         }
 165       }
 166
 167       /* Clean up */
 168       do
 169       {
 170         iter = gph->ahead->next;
 171         GNUNET_free (gph->ahead);
 172         gph->ahead = iter;
 173       } while (iter != NULL);
 174       GNUNET_CRYPTO_rsa_key_free (gph->key);
 175
 176       GNUNET_free (gph);
 177       return;
 178     }
 179
 180     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 181                 "GNS_AUTO_PSEU: Trying delegated name %s\n", gph->name);
 182     memcpy (gph->test_name, gph->name, strlen (gph->name)+1);
 183     GNUNET_NAMESTORE_lookup_record (namestore_handle,
 184                                     &gph->our_zone,
 185                                     gph->test_name,
 186                                     GNUNET_NAMESTORE_TYPE_ANY,
 187                                     &process_pseu_lookup_ns,
 188                                     gph);
 189     return;
 190   }
 191
 192   /** name is free */
 193   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 194             "GNS_AUTO_PSEU: Name %s not taken in NS! Adding\n", gph->test_name);
 195
 196   new_pkey.expiration = GNUNET_TIME_UNIT_FOREVER_ABS;
 197   new_pkey.data_size = sizeof (struct GNUNET_CRYPTO_ShortHashCode);
 198   new_pkey.data = &gph->ahead->zone;
 199   new_pkey.record_type = GNUNET_GNS_RECORD_PKEY;
 200   new_pkey.flags = GNUNET_NAMESTORE_RF_AUTHORITY
 201                  | GNUNET_NAMESTORE_RF_PRIVATE
 202                  | GNUNET_NAMESTORE_RF_PENDING;
 203   GNUNET_NAMESTORE_record_create (namestore_handle,
 204                                   gph->key,
 205                                   gph->test_name,
 206                                   &new_pkey,
 207                                   NULL, //cont
 208                                   NULL); //cls
 209   do
 210   {
 211     iter = gph->ahead->next;
 212     GNUNET_free (gph->ahead);
 213     gph->ahead = iter;
 214   } while (iter != NULL);
 215   GNUNET_CRYPTO_rsa_key_free (gph->key);
 216   GNUNET_free (gph);
 217
 218 }
 219
 220 /**
 221  * process result of a dht pseu lookup
 222  *
 223  * @param gph the handle
 224  * @param name the pseu result or NULL
 225  */
 226 static void
 227 process_pseu_result (struct GetPseuAuthorityHandle* gph, char* name)
 228 {
 229   if (NULL == name)
 230   {
 231     memcpy (gph->test_name, gph->ahead->name, strlen (gph->ahead->name)+1);
 232   }
 233   else
 234   {
 235     memcpy (gph->test_name, name, strlen(name)+1);
 236   }
 237
 238   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 239               "GNS_AUTO_PSEU: Checking %s for collision in NS\n",
 240               gph->test_name);
 241
 242   /**
 243    * Check for collision
 244    */
 245   GNUNET_NAMESTORE_lookup_record (namestore_handle,
 246                                   &gph->our_zone,
 247                                   gph->test_name,
 248                                   GNUNET_NAMESTORE_TYPE_ANY,
 249                                   &process_pseu_lookup_ns,
 250                                   gph);
 251 }
 252
 253 /**
 254  * Handle timeout for dht request
 255  *
 256  * @param cls the request handle as closure
 257  * @param tc the task context
 258  */
 259 static void
 260 handle_auth_discovery_timeout(void *cls,
 261                               const struct GNUNET_SCHEDULER_TaskContext *tc)
 262 {
 263   struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
 264   struct AuthorityChain *iter;
 265
 266   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 267               "GNS_GET_AUTH: dht lookup for query PSEU timed out.\n");
 268   GNUNET_DHT_get_stop (gph->get_handle);
 269   gph->get_handle = NULL;
 270
 271   if (gph->ahead->next != NULL)
 272   {
 273     if (GNUNET_CRYPTO_short_hash_cmp (&gph->ahead->next->zone,
 274                                       &gph->our_zone))
 275     {
 276       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "GNS_GET_AUTH: trying next!\n");
 277       iter = gph->ahead->next;
 278       GNUNET_free (gph->ahead);
 279       gph->ahead = iter;
 280       shorten_authority_chain (gph);
 281       return;
 282     }
 283   }
 284
 285   process_pseu_result (gph, NULL);
 286 }
 287
 288 /**
 289  * Function called when we find a PSEU entry in the DHT
 290  *
 291  * @param cls the request handle
 292  * @param exp lifetime
 293  * @param key the key the record was stored under
 294  * @param get_path get path
 295  * @param get_path_length get path length
 296  * @param put_path put path
 297  * @param put_path_length put path length
 298  * @param type the block type
 299  * @param size the size of the record
 300  * @param data the record data
 301  */
 302 static void
 303 process_auth_discovery_dht_result(void* cls,
 304                                   struct GNUNET_TIME_Absolute exp,
 305                                   const struct GNUNET_HashCode * key,
 306                                   const struct GNUNET_PeerIdentity *get_path,
 307                                   unsigned int get_path_length,
 308                                   const struct GNUNET_PeerIdentity *put_path,
 309                                   unsigned int put_path_length,
 310                                   enum GNUNET_BLOCK_Type type,
 311                                   size_t size, const void *data)
 312 {
 313   struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
 314   struct AuthorityChain *iter;
 315   struct GNSNameRecordBlock *nrb;
 316   char* rd_data = (char*)data;
 317   char* name;
 318   int num_records;
 319   size_t rd_size;
 320   int i;
 321
 322   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 323               "GNS_GET_AUTH: got dht result (size=%d)\n", size);
 324
 325   if (data == NULL)
 326   {
 327     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 328                 "GNS_GET_AUTH: got dht result null!\n", size);
 329
 330     do
 331     {
 332       iter = gph->ahead->next;
 333       GNUNET_free (gph->ahead);
 334       gph->ahead = iter;
 335     } while (iter != NULL);
 336     GNUNET_CRYPTO_rsa_key_free (gph->key);
 337     GNUNET_free (gph);
 338     return;
 339   }
 340
 341   nrb = (struct GNSNameRecordBlock*)data;
 342
 343   /* stop lookup and timeout task */
 344   GNUNET_DHT_get_stop (gph->get_handle);
 345   gph->get_handle = NULL;
 346   GNUNET_SCHEDULER_cancel (gph->timeout);
 347
 348   gph->get_handle = NULL;
 349
 350   nrb = (struct GNSNameRecordBlock*)data;
 351
 352   name = (char*)&nrb[1];
 353   num_records = ntohl (nrb->rd_count);
 354   {
 355     struct GNUNET_NAMESTORE_RecordData rd[num_records];
 356
 357     rd_data += strlen (name) + 1 + sizeof (struct GNSNameRecordBlock);
 358     rd_size = size - strlen (name) - 1 - sizeof (struct GNSNameRecordBlock);
 359
 360     if (GNUNET_SYSERR == GNUNET_NAMESTORE_records_deserialize (rd_size,
 361                                                                rd_data,
 362                                                                num_records,
 363                                                                rd))
 364     {
 365       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 366                   "GNS_GET_AUTH: Error deserializing data!\n");
 367     }
 368     else
 369     {
 370       for (i=0; i < num_records; i++)
 371       {
 372         if ((strcmp (name, "+") == 0) &&
 373             (rd[i].record_type == GNUNET_GNS_RECORD_PSEU))
 374         {
 375           /* found pseu */
 376           process_pseu_result (gph, (char*)rd[i].data);
 377           return;
 378         }
 379       }
 380     }
 381   }
 382
 383   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "GNS_GET_AUTH: no pseu in dht!\n");
 384
 385   if (gph->ahead->next != NULL)
 386   {
 387     if (GNUNET_CRYPTO_short_hash_cmp (&gph->ahead->next->zone,
 388                                       &gph->our_zone))
 389     {
 390       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "GNS_GET_AUTH: trying next!\n");
 391       iter = gph->ahead->next;
 392       GNUNET_free (gph->ahead);
 393       gph->ahead = iter;
 394       shorten_authority_chain (gph);
 395       return;
 396     }
 397   }
 398   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 399               "GNS_GET_AUTH: finished shorten, no results!\n");
 400   process_pseu_result (gph, NULL);
 401 }
 402
 403 /**
 404  * Process PSEU discovery for shorten via namestore
 405  *
 406  * @param cls the GetPseuAuthorityHandle
 407  * @param key the public key
 408  * @param expiration recorddata expiration
 409  * @param name the looked up name
 410  * @param rd_count number of records in set
 411  * @param rd record data
 412  * @param signature the signature
 413  */
 414 static void
 415 process_auth_discovery_ns_result(void* cls,
 416                       const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
 417                       struct GNUNET_TIME_Absolute expiration,
 418                       const char *name,
 419                       unsigned int rd_count,
 420                       const struct GNUNET_NAMESTORE_RecordData *rd,
 421                       const struct GNUNET_CRYPTO_RsaSignature *signature)
 422 {
 423   uint32_t xquery;
 424   struct GNUNET_CRYPTO_ShortHashCode name_hash;
 425   struct GNUNET_HashCode lookup_key;
 426   struct GNUNET_CRYPTO_HashAsciiEncoded lookup_key_string;
 427   struct GNUNET_HashCode name_hash_double;
 428   struct GNUNET_HashCode zone_hash_double;
 429   int i;
 430   struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
 431   struct AuthorityChain *iter;
 432
 433   /* no pseu found */
 434   if (rd_count == 0)
 435   {
 436     /**
 437      * check dht
 438      */
 439     GNUNET_CRYPTO_short_hash ("+", strlen ("+"), &name_hash);
 440     GNUNET_CRYPTO_short_hash_double (&name_hash, &name_hash_double);
 441     GNUNET_CRYPTO_short_hash_double (&gph->ahead->zone, &zone_hash_double);
 442     GNUNET_CRYPTO_hash_xor (&name_hash_double, &zone_hash_double, &lookup_key);
 443     GNUNET_CRYPTO_hash_to_enc (&lookup_key, &lookup_key_string);
 444
 445     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 446                "GNS_AUTO_PSEU: starting dht lookup for %s with key: %s\n",
 447                "+", (char*)&lookup_key_string);
 448
 449     gph->timeout = GNUNET_SCHEDULER_add_delayed (DHT_LOOKUP_TIMEOUT,
 450                                          &handle_auth_discovery_timeout, gph);
 451
 452     xquery = htonl (GNUNET_GNS_RECORD_PSEU);
 453
 454     GNUNET_assert (gph->get_handle == NULL);
 455
 456     gph->get_handle = GNUNET_DHT_get_start(dht_handle,
 457                                            GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
 458                                            &lookup_key,
 459                                            DHT_GNS_REPLICATION_LEVEL,
 460                                            GNUNET_DHT_RO_NONE,
 461                                            &xquery,
 462                                            sizeof(xquery),
 463                                            &process_auth_discovery_dht_result,
 464                                            gph);
 465     return;
 466   }
 467
 468   for (i=0; i < rd_count; i++)
 469   {
 470     if ((strcmp (name, "+") == 0) &&
 471         (rd[i].record_type == GNUNET_GNS_RECORD_PSEU))
 472     {
 473       /* found pseu */
 474       process_pseu_result (gph, (char*)rd[i].data);
 475       return;
 476     }
 477   }
 478
 479   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "GNS_GET_AUTH: no pseu in namestore!\n");
 480
 481   if (gph->ahead->next != NULL)
 482   {
 483     if (GNUNET_CRYPTO_short_hash_cmp (&gph->ahead->next->zone,
 484                                       &gph->our_zone))
 485     {
 486       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "GNS_GET_AUTH: trying next!\n");
 487       iter = gph->ahead->next;
 488       GNUNET_free (gph->ahead);
 489       gph->ahead = iter;
 490       shorten_authority_chain (gph);
 491       return;
 492     }
 493   }
 494
 495   process_pseu_result (gph, NULL);
 496 }
 497
 498 /**
 499  * Callback called by namestore for a zone to name
 500  * result
 501  *
 502  * @param cls the closure
 503  * @param zone_key the zone we queried
 504  * @param expire the expiration time of the name
 505  * @param name the name found or NULL
 506  * @param rd_len number of records for the name
 507  * @param rd the record data (PKEY) for the name
 508  * @param signature the signature for the record data
 509  */
 510 static void
 511 process_zone_to_name_discover (void *cls,
 512                  const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
 513                  struct GNUNET_TIME_Absolute expire,
 514                  const char *name,
 515                  unsigned int rd_len,
 516                  const struct GNUNET_NAMESTORE_RecordData *rd,
 517                  const struct GNUNET_CRYPTO_RsaSignature *signature)
 518 {
 519   struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
 520   struct AuthorityChain *iter;
 521
 522   /* we found a match in our own zone */
 523   if (rd_len != 0)
 524   {
 525     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 526                "GNS_AUTO_PSEU: name for zone in our root %s\n", name);
 527
 528     iter = gph->ahead;
 529     do
 530     {
 531       iter = gph->ahead->next;
 532       GNUNET_free (gph->ahead);
 533       gph->ahead = iter;
 534     } while (iter != NULL);
 535     GNUNET_CRYPTO_rsa_key_free (gph->key);
 536     GNUNET_free (gph);
 537   }
 538   else
 539   {
 540
 541     GNUNET_NAMESTORE_lookup_record (namestore_handle,
 542                                     &gph->ahead->zone,
 543                                     "+",
 544                                     GNUNET_GNS_RECORD_PSEU,
 545                                     &process_auth_discovery_ns_result,
 546                                     gph);
 547   }
 548
 549 }
 550
 551
 552 /**
 553  * Callback that shortens authorities
 554  *
 555  * @param name the name given by delegation
 556  * @param zone the authority
 557  * @param our_zone our local zone
 558  * @param key the private key of our authority
 559  */
 560 static void
 561 shorten_authority_chain (struct GetPseuAuthorityHandle *gph)
 562 {
 563
 564   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
 565               "GNS_AUTO_PSEU: New authority %s discovered\n",
 566               gph->ahead->name);
 567
 568   GNUNET_NAMESTORE_zone_to_name (namestore_handle,
 569                                  &gph->our_zone,
 570                                  &gph->ahead->zone,
 571                                  &process_zone_to_name_discover,
 572                                  gph);
 573
 574 }
 575
 576 static void
 577 start_shorten (struct AuthorityChain *atail,
 578                struct GNUNET_CRYPTO_RsaPrivateKey *key)
 579 {
 580   struct AuthorityChain *new_head = NULL;
 581   struct AuthorityChain *new_tail = NULL;
 582   struct AuthorityChain *iter;
 583   struct AuthorityChain *acopy;
 584   struct GetPseuAuthorityHandle *gph;
 585   struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
 586   struct GNUNET_CRYPTO_RsaPrivateKeyBinaryEncoded *pb_key;
 587
 588   /* First copy the authority chain in reverse order */
 589   for (iter = atail; iter != NULL; iter = iter->prev)
 590   {
 591     acopy = GNUNET_malloc (sizeof (struct AuthorityChain));
 592     memcpy (acopy, iter, sizeof (struct AuthorityChain));
 593     acopy->next = NULL;
 594     acopy->prev = NULL;
 595     GNUNET_CONTAINER_DLL_insert (new_head, new_tail, acopy);
 596   }
 597
 598   gph = GNUNET_malloc (sizeof (struct GetPseuAuthorityHandle));
 599
 600   GNUNET_CRYPTO_rsa_key_get_public (key, &pkey);
 601   pb_key = GNUNET_CRYPTO_rsa_encode_key (key);
 602   gph->key = GNUNET_CRYPTO_rsa_decode_key ((char*)pb_key, ntohs (pb_key->len));
 603   //gph->key = key;//GNUNET_malloc (sizeof (struct GNUNET_CRYPTO_RsaPrivateKey));
 604   //memcpy (gph->key, key, sizeof (struct GNUNET_CRYPTO_RsaPrivateKey));
 605
 606   GNUNET_CRYPTO_short_hash (&pkey,
 607                         sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
 608                         &gph->our_zone);
 609   gph->ahead = new_head;
 610
 611   shorten_authority_chain (gph);
 612 }
 613
 614 /**
 615  * Initialize the resolver
 616  *
 617  * @param nh the namestore handle
 618  * @param dh the dht handle
 619  * @param lz the local zone's hash
 620  * @param max_bg_queries maximum number of parallel background queries in dht
 621  * @param ignore_pending ignore records that still require user confirmation
 622  *        on lookup
 623  * @return GNUNET_OK on success
 624  */
 625 int
 626 gns_resolver_init(struct GNUNET_NAMESTORE_Handle *nh,
 627                   struct GNUNET_DHT_Handle *dh,
 628                   struct GNUNET_CRYPTO_ShortHashCode lz,
 629                   unsigned long long max_bg_queries,
 630                   int ignore_pending)
 631 {
 632   namestore_handle = nh;
 633   dht_handle = dh;
 634   local_zone = lz;
 635   dht_lookup_heap =
 636     GNUNET_CONTAINER_heap_create(GNUNET_CONTAINER_HEAP_ORDER_MIN);
 637   max_allowed_background_queries = max_bg_queries;
 638   ignore_pending_records = ignore_pending;
 639
 640   if ((namestore_handle != NULL) && (dht_handle != NULL))
 641   {
 642     return GNUNET_OK;
 643   }
 644   return GNUNET_SYSERR;
 645 }
 646
 647 /**
 648  * Cleanup background lookups
 649  *
 650  * @param cls closure to iterator
 651  * @param node heap nodes
 652  * @param element the resolver handle
 653  * @param cost heap cost
 654  * @return always GNUNET_YES
 655  */
 656 static int
 657 cleanup_pending_background_queries(void* cls,
 658                                    struct GNUNET_CONTAINER_HeapNode *node,
 659                                    void *element,
 660                                    GNUNET_CONTAINER_HeapCostType cost)
 661 {
 662   struct ResolverHandle *rh = (struct ResolverHandle *)element;
 663   ResolverCleanupContinuation cont = cls;
 664
 665   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 666              "GNS_CLEANUP-%llu: Terminating background lookup for %s\n",
 667              rh->id, rh->name);
 668   GNUNET_DHT_get_stop(rh->get_handle);
 669   rh->get_handle = NULL;
 670   rh->proc(rh->proc_cls, rh, 0, NULL);
 671
 672   GNUNET_CONTAINER_heap_remove_node(node);
 673
 674   if (GNUNET_CONTAINER_heap_get_size(dht_lookup_heap) == 0)
 675     cont();
 676
 677
 678   return GNUNET_YES;
 679 }
 680
 681
 682 /**
 683  * Shutdown resolver
 684  */
 685 void
 686 gns_resolver_cleanup(ResolverCleanupContinuation cont)
 687 {
 688   unsigned int s = GNUNET_CONTAINER_heap_get_size(dht_lookup_heap);
 689   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 690              "GNS_CLEANUP: %d pending background queries to terminate\n", s);
 691
 692   if (0 != s)
 693     GNUNET_CONTAINER_heap_iterate (dht_lookup_heap,
 694                                    &cleanup_pending_background_queries,
 695                                    cont);
 696   else
 697     cont();
 698 }
 699
 700
 701 /**
 702  * Helper function to free resolver handle
 703  *
 704  * @param rh the handle to free
 705  */
 706 static void
 707 free_resolver_handle(struct ResolverHandle* rh)
 708 {
 709   struct AuthorityChain *ac;
 710   struct AuthorityChain *ac_next;
 711
 712   if (NULL == rh)
 713     return;
 714
 715   ac = rh->authority_chain_head;
 716
 717   while (NULL != ac)
 718   {
 719     ac_next = ac->next;
 720     GNUNET_free(ac);
 721     ac = ac_next;
 722   }
 723
 724   if (NULL != rh->dns_raw_packet)
 725     GNUNET_free (rh->dns_raw_packet);
 726
 727   GNUNET_free(rh);
 728 }
 729
 730
 731 /**
 732  * Callback when record data is put into namestore
 733  *
 734  * @param cls the closure
 735  * @param success GNUNET_OK on success
 736  * @param emsg the error message. NULL if SUCCESS==GNUNET_OK
 737  */
 738 void
 739 on_namestore_record_put_result(void *cls,
 740                                int32_t success,
 741                                const char *emsg)
 742 {
 743   if (GNUNET_NO == success)
 744   {
 745     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 746                "GNS_NS: records already in namestore\n");
 747     return;
 748   }
 749   else if (GNUNET_YES == success)
 750   {
 751     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 752                "GNS_NS: records successfully put in namestore\n");
 753     return;
 754   }
 755
 756   GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
 757              "GNS_NS: Error putting records into namestore: %s\n", emsg);
 758 }
 759
 760 static void
 761 handle_lookup_timeout(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 762 {
 763   struct ResolverHandle *rh = cls;
 764
 765   if (rh->timeout_cont)
 766     rh->timeout_cont(rh->timeout_cont_cls, tc);
 767 }
 768
 769 /**
 770  * Processor for background lookups in the DHT
 771  *
 772  * @param cls closure (NULL)
 773  * @param rd_count number of records found (not 0)
 774  * @param rd record data
 775  */
 776 static void
 777 background_lookup_result_processor(void *cls,
 778                                    uint32_t rd_count,
 779                                    const struct GNUNET_NAMESTORE_RecordData *rd)
 780 {
 781   //We could do sth verbose/more useful here but it doesn't make any difference
 782   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 783              "GNS_BG: background dht lookup for finished. (%d results)\n",
 784              rd_count);
 785 }
 786
 787 /**
 788  * Handle timeout for DHT requests
 789  *
 790  * @param cls the request handle as closure
 791  * @param tc the task context
 792  */
 793 static void
 794 dht_lookup_timeout(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 795 {
 796   struct ResolverHandle *rh = cls;
 797   struct RecordLookupHandle *rlh = (struct RecordLookupHandle *)rh->proc_cls;
 798   char new_name[MAX_DNS_NAME_LENGTH];
 799
 800   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 801              "GNS_PHASE_REC-%d: dht lookup for query %s (%ds)timed out.\n",
 802              rh->id, rh->name, rh->timeout.rel_value);
 803   /**
 804    * Start resolution in bg
 805    */
 806   //strcpy(new_name, rh->name);
 807   //memcpy(new_name+strlen(new_name), GNUNET_GNS_TLD, strlen(GNUNET_GNS_TLD));
 808   GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
 809                   rh->name, GNUNET_GNS_TLD);
 810
 811   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 812              "GNS_PHASE_REC-%d: Starting background lookup for %s type %d\n",
 813              rh->id, new_name, rlh->record_type);
 814
 815   gns_resolver_lookup_record(rh->authority,
 816                              rh->private_local_zone,
 817                              rlh->record_type,
 818                              new_name,
 819                              rh->priv_key,
 820                              GNUNET_TIME_UNIT_FOREVER_REL,
 821                              GNUNET_NO,
 822                              &background_lookup_result_processor,
 823                              NULL);
 824   rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
 825
 826   GNUNET_DHT_get_stop (rh->get_handle);
 827   rh->get_handle = NULL;
 828   rh->proc(rh->proc_cls, rh, 0, NULL);
 829 }
 830
 831
 832 /**
 833  * Function called when we get a result from the dht
 834  * for our record query
 835  *
 836  * @param cls the request handle
 837  * @param exp lifetime
 838  * @param key the key the record was stored under
 839  * @param get_path get path
 840  * @param get_path_length get path length
 841  * @param put_path put path
 842  * @param put_path_length put path length
 843  * @param type the block type
 844  * @param size the size of the record
 845  * @param data the record data
 846  */
 847 static void
 848 process_record_result_dht(void* cls,
 849                  struct GNUNET_TIME_Absolute exp,
 850                  const struct GNUNET_HashCode * key,
 851                  const struct GNUNET_PeerIdentity *get_path,
 852                  unsigned int get_path_length,
 853                  const struct GNUNET_PeerIdentity *put_path,
 854                  unsigned int put_path_length,
 855                  enum GNUNET_BLOCK_Type type,
 856                  size_t size, const void *data)
 857 {
 858   struct ResolverHandle *rh;
 859   struct RecordLookupHandle *rlh;
 860   struct GNSNameRecordBlock *nrb;
 861   uint32_t num_records;
 862   char* name = NULL;
 863   char* rd_data = (char*)data;
 864   int i;
 865   int rd_size;
 866
 867   rh = (struct ResolverHandle *)cls;
 868   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 869              "GNS_PHASE_REC-%d: got dht result (size=%d)\n", rh->id, size);
 870
 871   if (data == NULL)
 872     return;
 873
 874   //FIXME maybe check expiration here, check block type
 875
 876
 877   rlh = (struct RecordLookupHandle *) rh->proc_cls;
 878   nrb = (struct GNSNameRecordBlock*)data;
 879
 880   /* stop lookup and timeout task */
 881   GNUNET_DHT_get_stop (rh->get_handle);
 882   rh->get_handle = NULL;
 883
 884   if (rh->dht_heap_node != NULL)
 885   {
 886     GNUNET_CONTAINER_heap_remove_node(rh->dht_heap_node);
 887     rh->dht_heap_node = NULL;
 888   }
 889
 890   if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
 891   {
 892     GNUNET_SCHEDULER_cancel(rh->timeout_task);
 893     rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
 894   }
 895
 896   rh->get_handle = NULL;
 897   name = (char*)&nrb[1];
 898   num_records = ntohl(nrb->rd_count);
 899   {
 900     struct GNUNET_NAMESTORE_RecordData rd[num_records];
 901
 902     rd_data += strlen(name) + 1 + sizeof(struct GNSNameRecordBlock);
 903     rd_size = size - strlen(name) - 1 - sizeof(struct GNSNameRecordBlock);
 904
 905     if (GNUNET_SYSERR == GNUNET_NAMESTORE_records_deserialize (rd_size,
 906                                                                rd_data,
 907                                                                num_records,
 908                                                                rd))
 909     {
 910       GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
 911                  "GNS_PHASE_REC-%d: Error deserializing data!\n", rh->id);
 912       return;
 913     }
 914
 915     for (i=0; i<num_records; i++)
 916     {
 917       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 918                "GNS_PHASE_REC-%d: Got name: %s (wanted %s)\n",
 919                rh->id, name, rh->name);
 920       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 921                "GNS_PHASE_REC-%d: Got type: %d\n",
 922                rh->id, rd[i].record_type);
 923       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 924                "GNS_PHASE_REC-%d: Got data length: %d\n",
 925                rh->id, rd[i].data_size);
 926       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 927                "GNS_PHASE_REC-%d: Got flag %d\n",
 928                rh->id, rd[i].flags);
 929
 930      if ((strcmp(name, rh->name) == 0) &&
 931          (rd[i].record_type == rlh->record_type))
 932       {
 933         rh->answered++;
 934       }
 935
 936     }
 937
 938     /**
 939      * FIXME check pubkey against existing key in namestore?
 940      * https://gnunet.org/bugs/view.php?id=2179
 941      */
 942
 943     /* Save to namestore */
 944     GNUNET_NAMESTORE_record_put (namestore_handle,
 945                                  &nrb->public_key,
 946                                  name,
 947                                  exp,
 948                                  num_records,
 949                                  rd,
 950                                  &nrb->signature,
 951                                  &on_namestore_record_put_result, //cont
 952                                  NULL); //cls
 953
 954
 955     if (rh->answered)
 956       rh->proc(rh->proc_cls, rh, num_records, rd);
 957     else
 958       rh->proc(rh->proc_cls, rh, 0, NULL);
 959   }
 960
 961 }
 962
 963
 964 /**
 965  * Start DHT lookup for a (name -> query->record_type) record in
 966  * rh->authority's zone
 967  *
 968  * @param rh the pending gns query context
 969  */
 970 static void
 971 resolve_record_dht(struct ResolverHandle *rh)
 972 {
 973   uint32_t xquery;
 974   struct GNUNET_CRYPTO_ShortHashCode name_hash;
 975   struct GNUNET_HashCode lookup_key;
 976   struct GNUNET_HashCode name_hash_double;
 977   struct GNUNET_HashCode zone_hash_double;
 978   struct GNUNET_CRYPTO_HashAsciiEncoded lookup_key_string;
 979   struct RecordLookupHandle *rlh = (struct RecordLookupHandle *)rh->proc_cls;
 980   struct ResolverHandle *rh_heap_root;
 981
 982   GNUNET_CRYPTO_short_hash(rh->name, strlen(rh->name), &name_hash);
 983   GNUNET_CRYPTO_short_hash_double(&name_hash, &name_hash_double);
 984   GNUNET_CRYPTO_short_hash_double(&rh->authority, &zone_hash_double);
 985   GNUNET_CRYPTO_hash_xor(&name_hash_double, &zone_hash_double, &lookup_key);
 986   GNUNET_CRYPTO_hash_to_enc (&lookup_key, &lookup_key_string);
 987
 988   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 989              "GNS_PHASE_REC-%d: starting dht lookup for %s with key: %s\n",
 990              rh->id, rh->name, (char*)&lookup_key_string);
 991
 992   //rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
 993   rh->dht_heap_node = NULL;
 994
 995   if (rh->timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
 996   {
 997     /**
 998      * Update timeout if necessary
 999      */
1000     if (rh->timeout_task == GNUNET_SCHEDULER_NO_TASK)
1001     {
1002
1003     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1004                "GNS_PHASE_REC-%d: Adjusting timeout\n", rh->id);
1005     /*
1006      * Set timeout for authority lookup phase to 1/2
1007      */
1008       rh->timeout_task = GNUNET_SCHEDULER_add_delayed(
1009                                 GNUNET_TIME_relative_divide(rh->timeout, 2),
1010                                                 &handle_lookup_timeout,
1011                                                 rh);
1012     }
1013     //rh->timeout_task = GNUNET_SCHEDULER_add_delayed (DHT_LOOKUP_TIMEOUT,
1014     //                                                   &dht_lookup_timeout,
1015     //                                                   rh);
1016     rh->timeout_cont = &dht_lookup_timeout;
1017     rh->timeout_cont_cls = rh;
1018   }
1019   else
1020   {
1021     if (max_allowed_background_queries <=
1022         GNUNET_CONTAINER_heap_get_size (dht_lookup_heap))
1023     {
1024       rh_heap_root = GNUNET_CONTAINER_heap_remove_root (dht_lookup_heap);
1025       GNUNET_DHT_get_stop(rh_heap_root->get_handle);
1026       rh_heap_root->get_handle = NULL;
1027       rh_heap_root->dht_heap_node = NULL;
1028
1029       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1030            "GNS_PHASE_REC-%d: Replacing oldest background query for %s\n",
1031                  rh->id, rh_heap_root->name);
1032       rh_heap_root->proc(rh_heap_root->proc_cls,
1033                          rh_heap_root,
1034                          0,
1035                          NULL);
1036     }
1037     rh->dht_heap_node = GNUNET_CONTAINER_heap_insert (dht_lookup_heap,
1038                                          rh,
1039                                          GNUNET_TIME_absolute_get().abs_value);
1040   }
1041
1042   xquery = htonl(rlh->record_type);
1043
1044   GNUNET_assert(rh->get_handle == NULL);
1045   rh->get_handle = GNUNET_DHT_get_start(dht_handle,
1046                        GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
1047                        &lookup_key,
1048                        DHT_GNS_REPLICATION_LEVEL,
1049                        GNUNET_DHT_RO_NONE,
1050                        &xquery,
1051                        sizeof(xquery),
1052                        &process_record_result_dht,
1053                        rh);
1054
1055 }
1056
1057
1058 /**
1059  * Namestore calls this function if we have record for this name.
1060  * (or with rd_count=0 to indicate no matches)
1061  *
1062  * @param cls the pending query
1063  * @param key the key of the zone we did the lookup
1064  * @param expiration expiration date of the namestore entry
1065  * @param name the name for which we need an authority
1066  * @param rd_count the number of records with 'name'
1067  * @param rd the record data
1068  * @param signature the signature of the authority for the record data
1069  */
1070 static void
1071 process_record_result_ns(void* cls,
1072                   const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
1073                   struct GNUNET_TIME_Absolute expiration,
1074                   const char *name, unsigned int rd_count,
1075                   const struct GNUNET_NAMESTORE_RecordData *rd,
1076                   const struct GNUNET_CRYPTO_RsaSignature *signature)
1077 {
1078   struct ResolverHandle *rh;
1079   struct RecordLookupHandle *rlh;
1080   struct GNUNET_TIME_Relative remaining_time;
1081   struct GNUNET_CRYPTO_ShortHashCode zone;
1082
1083   rh = (struct ResolverHandle *) cls;
1084   rlh = (struct RecordLookupHandle *)rh->proc_cls;
1085   GNUNET_CRYPTO_short_hash(key,
1086                      sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1087                      &zone);
1088   remaining_time = GNUNET_TIME_absolute_get_remaining (expiration);
1089
1090
1091
1092   rh->status = 0;
1093
1094   if (name != NULL)
1095   {
1096     rh->status |= RSL_RECORD_EXISTS;
1097   }
1098
1099   if (remaining_time.rel_value == 0)
1100   {
1101     rh->status |= RSL_RECORD_EXPIRED;
1102   }
1103
1104   if (rd_count == 0)
1105   {
1106     /**
1107      * Lookup terminated and no results
1108      */
1109     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1110       "GNS_PHASE_REC-%d: Namestore lookup for %s terminated without results\n",
1111          rh->id, name);
1112
1113     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1114                "GNS_PHASE_REC-%d: Record %s unknown in namestore\n",
1115                rh->id, rh->name);
1116     /**
1117      * Our zone and no result? Cannot resolve TT
1118      */
1119     rh->proc(rh->proc_cls, rh, 0, NULL);
1120     return;
1121
1122   }
1123   else
1124   {
1125
1126     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1127            "GNS_PHASE_REC-%d: Processing additional result %s from namestore\n",
1128               rh->id, name);
1129     int i;
1130     for (i=0; i<rd_count;i++)
1131     {
1132
1133       if (rd[i].record_type != rlh->record_type)
1134         continue;
1135
1136       if (ignore_pending_records &&
1137           (rd[i].flags & GNUNET_NAMESTORE_RF_PENDING))
1138       {
1139         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1140         "GNS_PHASE_REC-%d: Record %s is awaiting user confirmation. Skipping\n",
1141         rh->id, name);
1142         continue;
1143       }
1144
1145       if ((GNUNET_TIME_absolute_get_remaining (rd[i].expiration)).rel_value
1146           == 0)
1147       {
1148         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1149                    "GNS_PHASE_REC-%d: This record is expired. Skipping\n",
1150                    rh->id);
1151         continue;
1152       }
1153
1154       rh->answered++;
1155
1156     }
1157
1158     /**
1159      * no answers found
1160      */
1161     if (rh->answered == 0)
1162     {
1163       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1164                  "GNS_PHASE_REC-%d: No answers found. This is odd!\n", rh->id);
1165       rh->proc(rh->proc_cls, rh, 0, NULL);
1166       return;
1167     }
1168
1169     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1170                "GNS_PHASE_REC-%d: Found %d answer(s) to query in %d records!\n",
1171                rh->id, rh->answered, rd_count);
1172
1173     rh->proc(rh->proc_cls, rh, rd_count, rd);
1174   }
1175 }
1176
1177
1178 /**
1179  * VPN redirect result callback
1180  *
1181  * @param cls the resolver handle
1182  * @param af the requested address family
1183  * @param address in_addr(6) respectively
1184  */
1185 static void
1186 process_record_result_vpn (void* cls, int af, const void *address)
1187 {
1188   struct ResolverHandle *rh = cls;
1189   struct RecordLookupHandle *rlh;
1190   struct GNUNET_NAMESTORE_RecordData rd;
1191
1192   rlh = (struct RecordLookupHandle *)rh->proc_cls;
1193
1194   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1195              "GNS_PHASE_REC_VPN-%d: Got answer from VPN to query!\n",
1196              rh->id);
1197   if (af == AF_INET)
1198   {
1199     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1200                "GNS_PHASE_REC-%d: Answer is IPv4!\n",
1201                rh->id);
1202     if (rlh->record_type != GNUNET_GNS_RECORD_TYPE_A)
1203     {
1204       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1205                  "GNS_PHASE_REC-%d: Requested record is not IPv4!\n",
1206                  rh->id);
1207       rh->proc (rh->proc_cls, rh, 0, NULL);
1208       return;
1209     }
1210     rd.record_type = GNUNET_GNS_RECORD_TYPE_A;
1211     rd.expiration = GNUNET_TIME_UNIT_FOREVER_ABS;
1212     rd.data = address;
1213     rd.data_size = sizeof (struct in_addr);
1214     rd.flags = 0;
1215     rh->proc (rh->proc_cls, rh, 1, &rd);
1216     return;
1217   }
1218   else if (af == AF_INET6)
1219   {
1220     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1221                "GNS_PHASE_REC-%d: Answer is IPv6!\n",
1222                rh->id);
1223     if (rlh->record_type != GNUNET_GNS_RECORD_AAAA)
1224     {
1225       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1226                  "GNS_PHASE_REC-%d: Requested record is not IPv6!\n",
1227                  rh->id);
1228       rh->proc (rh->proc_cls, rh, 0, NULL);
1229       return;
1230     }
1231     rd.record_type = GNUNET_GNS_RECORD_AAAA;
1232     rd.expiration = GNUNET_TIME_UNIT_FOREVER_ABS;
1233     rd.data = address;
1234     rd.data_size = sizeof (struct in6_addr);
1235     rd.flags = 0;
1236     rh->proc (rh->proc_cls, rh, 1, &rd);
1237     return;
1238   }
1239
1240   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1241              "GNS_PHASE_REC-%d: Got garbage from VPN!\n",
1242              rh->id);
1243   rh->proc (rh->proc_cls, rh, 0, NULL);
1244 }
1245
1246
1247 /**
1248  * finish lookup
1249  *
1250  * @param rh resolver handle
1251  * @param rlh record lookup handle
1252  * @param rd_cound number of results
1253  * @param rd results
1254  */
1255 static void
1256 finish_lookup(struct ResolverHandle *rh,
1257               struct RecordLookupHandle* rlh,
1258               unsigned int rd_count,
1259               const struct GNUNET_NAMESTORE_RecordData *rd);
1260
1261 /**
1262  * Process VPN lookup result for record
1263  *
1264  * @param cls the record lookup handle
1265  * @param rh resolver handle
1266  * @param rd_count number of results (1)
1267  * @param rd record data containing the result
1268  */
1269 static void
1270 handle_record_vpn (void* cls, struct ResolverHandle *rh,
1271                    unsigned int rd_count,
1272                    const struct GNUNET_NAMESTORE_RecordData *rd)
1273 {
1274   struct RecordLookupHandle* rlh = (struct RecordLookupHandle*) cls;
1275
1276   if (rd_count == 0)
1277   {
1278     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1279                "GNS_PHASE_REC_VPN-%d: VPN returned no records. (status: %d)!\n",
1280                rh->id,
1281                rh->status);
1282     /* give up, cannot resolve */
1283     finish_lookup(rh, rlh, 0, NULL);
1284     free_resolver_handle(rh);
1285     return;
1286   }
1287
1288   /* results found yay */
1289   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1290              "GNS_PHASE_REC_VPN-%d: Record resolved from VPN!", rh->id);
1291
1292   finish_lookup(rh, rlh, rd_count, rd);
1293
1294   free_resolver_handle(rh);
1295 }
1296
1297
1298 /**
1299  * Sends a UDP dns query to a nameserver specified in the rh
1300  *
1301  * @param rh the request handle
1302  */
1303 static void
1304 send_dns_packet (struct ResolverHandle *rh);
1305
1306
1307 static void
1308 read_dns_response (void *cls,
1309                    const struct GNUNET_SCHEDULER_TaskContext *tc)
1310 {
1311   struct ResolverHandle *rh = cls;
1312   struct RecordLookupHandle *rlh = rh->proc_cls;
1313   char buf[UINT16_MAX];
1314   ssize_t r;
1315   struct sockaddr_in addr;
1316   socklen_t addrlen;
1317   struct GNUNET_DNSPARSER_Packet *packet;
1318   struct GNUNET_NAMESTORE_RecordData rd;
1319   int found_delegation = GNUNET_NO;
1320   char* delegation_name = NULL;
1321   int i;
1322
1323   rh->dns_read_task = GNUNET_SCHEDULER_NO_TASK;
1324   if (0 == (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
1325   {
1326     /* timeout or shutdown */
1327     rh->proc (rh->proc_cls, rh, 0, NULL);
1328     GNUNET_NETWORK_socket_close (rh->dns_sock);
1329     free_resolver_handle (rh);
1330     return;
1331   }
1332
1333   addrlen = sizeof (addr);
1334   r = GNUNET_NETWORK_socket_recvfrom (rh->dns_sock,
1335                                       buf, sizeof (buf),
1336                                       (struct sockaddr*) &addr,
1337                                       &addrlen);
1338
1339   if (-1 == r)
1340   {
1341     GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "recvfrom");
1342     rh->proc (rh->proc_cls, rh, 0, NULL);
1343     GNUNET_NETWORK_socket_close (rh->dns_sock);
1344     free_resolver_handle (rh);
1345     return;
1346   }
1347
1348   packet = GNUNET_DNSPARSER_parse (buf, r);
1349
1350   if (NULL == packet)
1351   {
1352     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1353                 "Failed to parse DNS reply!\n");
1354     rh->proc (rh->proc_cls, rh, 0, NULL);
1355     GNUNET_NETWORK_socket_close (rh->dns_sock);
1356     free_resolver_handle (rh);
1357     return;
1358   }
1359
1360   for (i = 0; i < packet->num_answers; i++)
1361   {
1362     if ((packet->answers[i].type == rlh->record_type) &&
1363         (0 == strcmp (packet->answers[i].name, rh->dns_name)))
1364     {
1365       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1366                   "Found record!\n");
1367       rd.data = packet->answers[i].data.raw.data;
1368       rd.data_size = packet->answers[i].data.raw.data_len;
1369       rd.record_type = packet->answers[i].type;
1370       rd.flags = 0;
1371       rd.expiration = packet->answers[i].expiration_time;
1372       rh->proc (rh->proc_cls, rh, 1, &rd);
1373       GNUNET_NETWORK_socket_close (rh->dns_sock);
1374       GNUNET_DNSPARSER_free_packet (packet);
1375       free_resolver_handle (rh);
1376       return;
1377     }
1378   }
1379
1380   for (i = 0; i < packet->num_authority_records; i++)
1381   {
1382     if (packet->authority_records[i].type == GNUNET_GNS_RECORD_TYPE_NS)
1383     {
1384       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1385                   "Found NS delegation!\n");
1386       found_delegation = GNUNET_YES;
1387       delegation_name = packet->authority_records[i].data.hostname;
1388       break;
1389     }
1390   }
1391
1392   for (i = 0; i < packet->num_additional_records; i++)
1393   {
1394     if (found_delegation == GNUNET_NO)
1395       break;
1396
1397     if ((packet->additional_records[i].type == GNUNET_GNS_RECORD_TYPE_A) &&
1398         (0 == strcmp (packet->additional_records[i].name, delegation_name)))
1399     {
1400       GNUNET_assert (sizeof (struct in_addr) ==
1401                      packet->authority_records[i].data.raw.data_len);
1402
1403       rh->dns_addr.sin_addr =
1404         *((struct in_addr*)packet->authority_records[i].data.raw.data);
1405       send_dns_packet (rh);
1406       GNUNET_DNSPARSER_free_packet (packet);
1407       return;
1408     }
1409   }
1410
1411   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1412               "Failed to parse DNS reply!\n");
1413   rh->proc (rh->proc_cls, rh, 0, NULL);
1414   GNUNET_NETWORK_socket_close (rh->dns_sock);
1415   free_resolver_handle (rh);
1416   GNUNET_DNSPARSER_free_packet (packet);
1417   return;
1418 }
1419
1420 /**
1421  * Sends a UDP dns query to a nameserver specified in the rh
1422  *
1423  * @param rh the request handle
1424  */
1425 static void
1426 send_dns_packet (struct ResolverHandle *rh)
1427 {
1428   struct GNUNET_NETWORK_FDSet *rset = GNUNET_NETWORK_fdset_create ();
1429   GNUNET_NETWORK_fdset_set (rset, rh->dns_sock);
1430
1431   GNUNET_NETWORK_socket_sendto (rh->dns_sock,
1432                                 rh->dns_raw_packet,
1433                                 rh->dns_raw_packet_size,
1434                                 (struct sockaddr*)&rh->dns_addr,
1435                                 sizeof (struct sockaddr_in));
1436
1437   rh->dns_read_task = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1438                                                     rh->timeout, //FIXME less?
1439                                                     rset,
1440                                                     NULL,
1441                                                     &read_dns_response,
1442                                                     rh);
1443
1444   GNUNET_NETWORK_fdset_destroy (rset);
1445
1446 }
1447
1448 /**
1449  * The final phase of resoution.
1450  * We found a NS RR and want to resolve via DNS
1451  *
1452  * @param rh the pending lookup handle
1453  * @param rd_count length of record data
1454  * @param rd record data containing VPN RR
1455  */
1456 static void
1457 resolve_record_dns (struct ResolverHandle *rh,
1458                     int rd_count,
1459                     const struct GNUNET_NAMESTORE_RecordData *rd)
1460 {
1461   struct GNUNET_DNSPARSER_Query query;
1462   struct GNUNET_DNSPARSER_Packet packet;
1463   struct GNUNET_DNSPARSER_Flags flags;
1464   char dns_name[MAX_DNS_NAME_LENGTH];
1465   struct in_addr dnsip;
1466   struct sockaddr_in addr;
1467   struct sockaddr *sa;
1468   int i;
1469   struct RecordLookupHandle *rlh = rh->proc_cls;
1470
1471   /* We cancel here as to not include the ns lookup in the timeout */
1472   if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1473   {
1474     GNUNET_SCHEDULER_cancel(rh->timeout_task);
1475     rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1476   }
1477   /* Start shortening */
1478   if ((rh->priv_key != NULL) && is_canonical (rh->name))
1479   {
1480     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1481              "GNS_PHASE_REC_DNS-%llu: Trying to shorten authority chain\n",
1482              rh->id);
1483              start_shorten (rh->authority_chain_tail,
1484              rh->priv_key);
1485   }
1486
1487   for (i = 0; i < rd_count; i++)
1488   {
1489     /* Synthesize dns name */
1490     if (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_NS)
1491       sprintf (rh->dns_name, "%s.%s", rh->name, (char*)rd[i].data);
1492     /* The glue */
1493     if (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_A)
1494       dnsip = *((struct in_addr*)rd[i].data);
1495   }
1496
1497   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1498               "GNS_PHASE_REC_DNS-%llu: Looking up %s from %s\n",
1499               dns_name,
1500               inet_ntoa (dnsip));
1501   rh->dns_sock = GNUNET_NETWORK_socket_create (AF_INET, SOCK_DGRAM, 0);
1502   if (rh->dns_sock == NULL)
1503   {
1504     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1505                 "GNS_PHASE_REC_DNS-%llu: Error creating udp socket for dns!\n",
1506                 rh->id);
1507     rh->proc(rh->proc_cls, rh, 0, NULL);
1508     return;
1509   }
1510
1511   memset (&addr, 0, sizeof (struct sockaddr_in));
1512   sa = (struct sockaddr *) &addr;
1513   sa->sa_family = AF_INET;
1514   if (GNUNET_OK != GNUNET_NETWORK_socket_bind (rh->dns_sock,
1515                                                sa,
1516                                                sizeof (struct sockaddr_in)))
1517   {
1518     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1519                 "GNS_PHASE_REC_DNS-%llu: Error binding udp socket for dns!\n",
1520                 rh->id);
1521     GNUNET_NETWORK_socket_close (rh->dns_sock);
1522     rh->proc(rh->proc_cls, rh, 0, NULL);
1523     return;
1524   }
1525   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1526               "GNS_PHASE_REC_DNS-%llu: NOT IMPLEMENTED!\n",
1527               rh->id);
1528   GNUNET_NETWORK_socket_close (rh->dns_sock);
1529   rh->proc(rh->proc_cls, rh, 0, NULL);
1530   /*TODO create dnsparser query, serialize, sendto, handle reply*/
1531   query.name = dns_name;
1532   query.type = rlh->record_type;
1533   query.class = GNUNET_DNSPARSER_CLASS_INTERNET;
1534   memset (&flags, 0, sizeof (flags));
1535   flags.recursion_desired = 1;
1536   flags.checking_disabled = 1;
1537   packet.queries = &query;
1538   packet.answers = NULL;
1539   packet.authority_records = NULL;
1540   packet.num_queries = 1;
1541   packet.num_answers = 0;
1542   packet.num_authority_records = 0;
1543   packet.num_additional_records = 0;
1544   packet.flags = flags;
1545   packet.id = rh->id;
1546   if (GNUNET_OK != GNUNET_DNSPARSER_pack (&packet,
1547                                           UINT16_MAX,
1548                                           &rh->dns_raw_packet,
1549                                           &rh->dns_raw_packet_size))
1550   {
1551     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1552                 "GNS_PHASE_REC_DNS-%llu: Creating raw dns packet!\n",
1553                 rh->id);
1554     GNUNET_NETWORK_socket_close (rh->dns_sock);
1555     rh->proc(rh->proc_cls, rh, 0, NULL);
1556     return;
1557   }
1558
1559   rh->dns_addr.sin_family = AF_INET;
1560   rh->dns_addr.sin_port = htons (53); //domain
1561   rh->dns_addr.sin_addr = dnsip;
1562 #if HAVE_SOCKADDR_IN_SIN_LEN
1563   rh->dns_addr.sin_len = (u_char) sizeof (struct sockaddr_in);
1564 #endif
1565
1566   send_dns_packet (rh);
1567
1568   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1569               "GNS_PHASE_REC_DNS-%llu: NOT IMPLEMENTED!\n",
1570               rh->id);
1571   GNUNET_free (rh->dns_raw_packet);
1572   GNUNET_NETWORK_socket_close (rh->dns_sock);
1573   rh->proc(rh->proc_cls, rh, 0, NULL);
1574 }
1575
1576
1577 /**
1578  * The final phase of resoution.
1579  * We found a VPN RR and want to request an IPv4/6 address
1580  *
1581  * @param rh the pending lookup handle
1582  * @param rd_count length of record data
1583  * @param rd record data containing VPN RR
1584  */
1585 static void
1586 resolve_record_vpn (struct ResolverHandle *rh,
1587                     int rd_count,
1588                     const struct GNUNET_NAMESTORE_RecordData *rd)
1589 {
1590   int af;
1591   int proto;
1592   struct GNUNET_HashCode peer_id;
1593   struct GNUNET_CRYPTO_HashAsciiEncoded s_pid;
1594   struct GNUNET_HashCode serv_desc;
1595   struct GNUNET_CRYPTO_HashAsciiEncoded s_sd;
1596
1597   /* We cancel here as to not include the ns lookup in the timeout */
1598   if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1599   {
1600     GNUNET_SCHEDULER_cancel(rh->timeout_task);
1601     rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1602   }
1603   /* Start shortening */
1604   if ((rh->priv_key != NULL) && is_canonical (rh->name))
1605   {
1606     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1607              "GNS_PHASE_REC_VPN-%llu: Trying to shorten authority chain\n",
1608              rh->id);
1609              start_shorten (rh->authority_chain_tail,
1610              rh->priv_key);
1611   }
1612
1613   /* Extracting VPN information FIXME rd parsing with NS API?*/
1614   if (4 != SSCANF ((char*)rd, "%d:%d:%s:%s", &af, &proto,
1615                    (char*)&s_pid, (char*)&s_sd))
1616   {
1617     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1618                 "GNS_PHASE_REC_VPN-%llu: Error parsing VPN RR!\n",
1619                 rh->id);
1620     rh->proc(rh->proc_cls, rh, 0, NULL);
1621     return;
1622   }
1623
1624   if ((GNUNET_OK != GNUNET_CRYPTO_hash_from_string ((char*)&s_pid, &peer_id)) ||
1625       (GNUNET_OK != GNUNET_CRYPTO_hash_from_string ((char*)&s_sd, &serv_desc)))
1626   {
1627     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1628                 "GNS_PHASE_REC_VPN-%llu: Error parsing VPN RR hashes!\n",
1629                 rh->id);
1630     rh->proc(rh->proc_cls, rh, 0, NULL);
1631     return;
1632   }
1633
1634   rh->proc = &handle_record_vpn;
1635
1636   //FIXME timeout??
1637   rh->vpn_handle = GNUNET_VPN_redirect_to_peer (vpn_handle,
1638                                           af, proto,
1639                                           (struct GNUNET_PeerIdentity*)&peer_id,
1640                                           &serv_desc,
1641                                           GNUNET_NO, //nac
1642                                           GNUNET_TIME_UNIT_FOREVER_ABS, //FIXME
1643                                           &process_record_result_vpn,
1644                                           rh);
1645
1646 }
1647
1648 /**
1649  * The final phase of resolution.
1650  * rh->name is a name that is canonical and we do not have a delegation.
1651  * Query namestore for this record
1652  *
1653  * @param rh the pending lookup handle
1654  */
1655 static void
1656 resolve_record_ns(struct ResolverHandle *rh)
1657 {
1658   struct RecordLookupHandle *rlh = (struct RecordLookupHandle *)rh->proc_cls;
1659
1660   /* We cancel here as to not include the ns lookup in the timeout */
1661   if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1662   {
1663     GNUNET_SCHEDULER_cancel(rh->timeout_task);
1664     rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1665   }
1666   /* Start shortening */
1667   if ((rh->priv_key != NULL) && is_canonical (rh->name))
1668   {
1669     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1670              "GNS_PHASE_REC-%llu: Trying to shorten authority chain\n",
1671              rh->id);
1672              start_shorten (rh->authority_chain_tail,
1673              rh->priv_key);
1674   }
1675
1676   /**
1677    * Try to resolve this record in our namestore.
1678    * The name to resolve is now in rh->authority_name
1679    * since we tried to resolve it to an authority
1680    * and failed.
1681    **/
1682   GNUNET_NAMESTORE_lookup_record(namestore_handle,
1683                                  &rh->authority,
1684                                  rh->name,
1685                                  rlh->record_type,
1686                                  &process_record_result_ns,
1687                                  rh);
1688 }
1689
1690
1691
1692 /**
1693  * Handle timeout for DHT requests
1694  *
1695  * @param cls the request handle as closure
1696  * @param tc the task context
1697  */
1698 static void
1699 dht_authority_lookup_timeout(void *cls,
1700                              const struct GNUNET_SCHEDULER_TaskContext *tc)
1701 {
1702   struct ResolverHandle *rh = cls;
1703   struct RecordLookupHandle *rlh = rh->proc_cls;
1704   char new_name[MAX_DNS_NAME_LENGTH];
1705
1706   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1707          "GNS_PHASE_DELEGATE_DHT-%llu: dht lookup for query %s (%ds)timed out.\n",
1708          rh->id, rh->authority_name, rh->timeout.rel_value);
1709
1710   rh->status |= RSL_TIMED_OUT;
1711
1712   rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1713
1714   GNUNET_DHT_get_stop (rh->get_handle);
1715   rh->get_handle = NULL;
1716
1717   if (strcmp(rh->name, "") == 0)
1718   {
1719     /*
1720      * promote authority back to name and try to resolve record
1721      */
1722     strcpy(rh->name, rh->authority_name);
1723     rh->proc(rh->proc_cls, rh, 0, NULL);
1724     return;
1725   }
1726
1727   /**
1728    * Start resolution in bg
1729    */
1730   GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH,
1731                   "%s.%s.%s", rh->name, rh->authority_name, GNUNET_GNS_TLD);
1732   //strcpy(new_name, rh->name);
1733   //strcpy(new_name+strlen(new_name), ".");
1734   //memcpy(new_name+strlen(new_name), GNUNET_GNS_TLD, strlen(GNUNET_GNS_TLD));
1735
1736   strcpy(rh->name, new_name);
1737
1738   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1739         "GNS_PHASE_DELEGATE_DHT-%llu: Starting background query for %s type %d\n",
1740         rh->id, rh->name, rlh->record_type);
1741
1742   gns_resolver_lookup_record(rh->authority,
1743                              rh->private_local_zone,
1744                              rlh->record_type,
1745                              new_name,
1746                              rh->priv_key,
1747                              GNUNET_TIME_UNIT_FOREVER_REL,
1748                              GNUNET_NO,
1749                              &background_lookup_result_processor,
1750                              NULL);
1751
1752   rh->proc(rh->proc_cls, rh, 0, NULL);
1753 }
1754
1755 /* Prototype */
1756 static void resolve_delegation_dht(struct ResolverHandle *rh);
1757
1758 /* Prototype */
1759 static void resolve_delegation_ns(struct ResolverHandle *rh);
1760
1761
1762 /**
1763  * Namestore resolution for delegation finished. Processing result.
1764  *
1765  * @param cls the closure
1766  * @param rh resolver handle
1767  * @param rd_count number of results (always 0)
1768  * @param rd record data (always NULL)
1769  */
1770 static void
1771 handle_delegation_ns(void* cls, struct ResolverHandle *rh,
1772                           unsigned int rd_count,
1773                           const struct GNUNET_NAMESTORE_RecordData *rd);
1774
1775
1776 /**
1777  * Function called when we get a result from the dht
1778  * for our query. Recursively tries to resolve authorities
1779  * for name in DHT.
1780  *
1781  * @param cls the request handle
1782  * @param exp lifetime
1783  * @param key the key the record was stored under
1784  * @param get_path get path
1785  * @param get_path_length get path length
1786  * @param put_path put path
1787  * @param put_path_length put path length
1788  * @param type the block type
1789  * @param size the size of the record
1790  * @param data the record data
1791  */
1792 static void
1793 process_delegation_result_dht(void* cls,
1794                  struct GNUNET_TIME_Absolute exp,
1795                  const struct GNUNET_HashCode * key,
1796                  const struct GNUNET_PeerIdentity *get_path,
1797                  unsigned int get_path_length,
1798                  const struct GNUNET_PeerIdentity *put_path,
1799                  unsigned int put_path_length,
1800                  enum GNUNET_BLOCK_Type type,
1801                  size_t size, const void *data)
1802 {
1803   struct ResolverHandle *rh;
1804   struct GNSNameRecordBlock *nrb;
1805   uint32_t num_records;
1806   char* name = NULL;
1807   char* rd_data = (char*) data;
1808   int i;
1809   int rd_size;
1810   struct GNUNET_CRYPTO_ShortHashCode zone, name_hash;
1811   struct GNUNET_HashCode zone_hash_double, name_hash_double;
1812
1813   rh = (struct ResolverHandle *)cls;
1814
1815   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1816              "GNS_PHASE_DELEGATE_DHT-%llu: Got DHT result\n", rh->id);
1817
1818   if (data == NULL)
1819     return;
1820
1821   nrb = (struct GNSNameRecordBlock*)data;
1822
1823   /* stop dht lookup and timeout task */
1824   GNUNET_DHT_get_stop (rh->get_handle);
1825
1826   rh->get_handle = NULL;
1827
1828   if (rh->dht_heap_node != NULL)
1829   {
1830     GNUNET_CONTAINER_heap_remove_node(rh->dht_heap_node);
1831     rh->dht_heap_node = NULL;
1832   }
1833
1834   num_records = ntohl(nrb->rd_count);
1835   name = (char*)&nrb[1];
1836   {
1837     struct GNUNET_NAMESTORE_RecordData rd[num_records];
1838
1839     rd_data += strlen(name) + 1 + sizeof(struct GNSNameRecordBlock);
1840     rd_size = size - strlen(name) - 1 - sizeof(struct GNSNameRecordBlock);
1841
1842     if (GNUNET_SYSERR == GNUNET_NAMESTORE_records_deserialize (rd_size,
1843                                                                rd_data,
1844                                                                num_records,
1845                                                                rd))
1846     {
1847       GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1848                  "GNS_PHASE_DELEGATE_DHT-%llu: Error deserializing data!\n",
1849                  rh->id);
1850       return;
1851     }
1852
1853     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1854                "GNS_PHASE_DELEGATE_DHT-%llu: Got name: %s (wanted %s)\n",
1855                rh->id, name, rh->authority_name);
1856     for (i=0; i<num_records; i++)
1857     {
1858
1859       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1860                 "GNS_PHASE_DELEGATE_DHT-%llu: Got name: %s (wanted %s)\n",
1861                 rh->id, name, rh->authority_name);
1862       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1863                  "GNS_PHASE_DELEGATE_DHT-%llu: Got type: %d (wanted %d)\n",
1864                  rh->id, rd[i].record_type, GNUNET_GNS_RECORD_PKEY);
1865       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1866                  "GNS_PHASE_DELEGATE_DHT-%llu: Got data length: %d\n",
1867                  rh->id, rd[i].data_size);
1868       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1869                  "GNS_PHASE_DELEGATE_DHT-%llu: Got flag %d\n",
1870                  rh->id, rd[i].flags);
1871
1872       if ((strcmp(name, rh->authority_name) == 0) &&
1873           (rd[i].record_type == GNUNET_GNS_RECORD_PKEY))
1874       {
1875         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1876                    "GNS_PHASE_DELEGATE_DHT-%llu: Authority found in DHT\n",
1877                    rh->id);
1878         rh->answered = 1;
1879         memcpy(&rh->authority, rd[i].data, sizeof(struct GNUNET_CRYPTO_ShortHashCode));
1880         struct AuthorityChain *auth =
1881           GNUNET_malloc(sizeof(struct AuthorityChain));
1882         auth->zone = rh->authority;
1883         memset(auth->name, 0, strlen(rh->authority_name)+1);
1884         strcpy(auth->name, rh->authority_name);
1885         GNUNET_CONTAINER_DLL_insert (rh->authority_chain_head,
1886                                      rh->authority_chain_tail,
1887                                      auth);
1888
1889         /** try to import pkey if private key available */
1890         //if (rh->priv_key && is_canonical (rh->name))
1891         //  process_discovered_authority(name, auth->zone,
1892         //                               rh->authority_chain_tail->zone,
1893         //                               rh->priv_key);
1894       }
1895
1896     }
1897
1898
1899     GNUNET_CRYPTO_short_hash(name, strlen(name), &name_hash);
1900     GNUNET_CRYPTO_short_hash_double(&name_hash, &name_hash_double);
1901     GNUNET_CRYPTO_hash_xor(key, &name_hash_double, &zone_hash_double);
1902     GNUNET_CRYPTO_short_hash_from_truncation (&zone_hash_double, &zone);
1903
1904     /* Save to namestore */
1905     if (0 != GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_tail->zone,
1906                                           &zone))
1907     {
1908       GNUNET_NAMESTORE_record_put (namestore_handle,
1909                                  &nrb->public_key,
1910                                  name,
1911                                  exp,
1912                                  num_records,
1913                                  rd,
1914                                  &nrb->signature,
1915                                  &on_namestore_record_put_result, //cont
1916                                  NULL); //cls
1917     }
1918   }
1919
1920   if (rh->answered)
1921   {
1922     rh->answered = 0;
1923     /**
1924      * delegate
1925      * FIXME in this case. should we ask namestore again?
1926      */
1927     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1928       "GNS_PHASE_DELEGATE_DHT-%llu: Answer from DHT for %s. Yet to resolve: %s\n",
1929       rh->id, rh->authority_name, rh->name);
1930
1931     if (strcmp(rh->name, "") == 0)
1932     {
1933       /* Start shortening */
1934       if ((rh->priv_key != NULL) && is_canonical (rh->name))
1935       {
1936         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1937              "GNS_PHASE_DELEGATE_DHT-%llu: Trying to shorten authority chain\n",
1938              rh->id);
1939         start_shorten (rh->authority_chain_tail,
1940                        rh->priv_key);
1941       }
1942
1943       rh->proc(rh->proc_cls, rh, 0, NULL);
1944     }
1945     else
1946     {
1947       rh->proc = &handle_delegation_ns;
1948       resolve_delegation_ns(rh);
1949     }
1950     return;
1951   }
1952
1953   /**
1954    * No pkey but name exists
1955    * promote back
1956    */
1957   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1958              "GNS_PHASE_DELEGATE_DHT-%llu: Adding %s back to %s\n",
1959              rh->id, rh->authority_name, rh->name);
1960   if (strcmp(rh->name, "") == 0)
1961     strcpy(rh->name, rh->authority_name);
1962   else
1963     GNUNET_snprintf(rh->name, MAX_DNS_NAME_LENGTH, "%s.%s",
1964                   rh->name, rh->authority_name); //FIXME ret
1965
1966   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1967              "GNS_PHASE_DELEGATE_DHT-%llu: %s restored\n", rh->id, rh->name);
1968   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1969            "GNS_PHASE_DELEGATE_DHT-%llu: DHT authority lookup found no match!\n",
1970            rh->id);
1971   rh->proc(rh->proc_cls, rh, 0, NULL);
1972 }
1973
1974 #define MAX_SOA_LENGTH sizeof(uint32_t)+sizeof(uint32_t)+sizeof(uint32_t)+sizeof(uint32_t)\
1975                         +(MAX_DNS_NAME_LENGTH*2)
1976 #define MAX_MX_LENGTH sizeof(uint16_t)+MAX_DNS_NAME_LENGTH
1977
1978
1979 static void
1980 expand_plus(char** dest, char* src, char* repl)
1981 {
1982   char* pos;
1983   unsigned int s_len = strlen(src)+1;
1984
1985   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1986              "GNS_POSTPROCESS: Got %s to expand with %s\n", src, repl);
1987
1988   if (s_len < 3)
1989   {
1990     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1991                "GNS_POSTPROCESS: %s to short\n", src);
1992
1993     /* no postprocessing */
1994     memcpy(*dest, src, s_len+1);
1995     return;
1996   }
1997
1998   if (0 == strcmp(src+s_len-3, ".+"))
1999   {
2000     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2001                "GNS_POSTPROCESS: Expanding .+ in %s\n", src);
2002     memset(*dest, 0, s_len+strlen(repl)+strlen(GNUNET_GNS_TLD));
2003     strcpy(*dest, src);
2004     pos = *dest+s_len-2;
2005     strcpy(pos, repl);
2006     pos += strlen(repl);
2007     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2008                "GNS_POSTPROCESS: Expanded to %s\n", *dest);
2009   }
2010   else
2011   {
2012     memcpy(*dest, src, s_len+1);
2013   }
2014 }
2015
2016 /**
2017  * finish lookup
2018  */
2019 static void
2020 finish_lookup(struct ResolverHandle *rh,
2021               struct RecordLookupHandle* rlh,
2022               unsigned int rd_count,
2023               const struct GNUNET_NAMESTORE_RecordData *rd)
2024 {
2025   int i;
2026   char new_rr_data[MAX_DNS_NAME_LENGTH];
2027   char new_mx_data[MAX_MX_LENGTH];
2028   char new_soa_data[MAX_SOA_LENGTH];
2029   struct GNUNET_NAMESTORE_RecordData p_rd[rd_count];
2030   char* repl_string;
2031   char* pos;
2032   unsigned int offset;
2033
2034   if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
2035   {
2036     GNUNET_SCHEDULER_cancel(rh->timeout_task);
2037     rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2038   }
2039
2040   if (rd_count > 0)
2041     memcpy(p_rd, rd, rd_count*sizeof(struct GNUNET_NAMESTORE_RecordData));
2042
2043   for (i = 0; i < rd_count; i++)
2044   {
2045
2046     if (rd[i].record_type != GNUNET_GNS_RECORD_TYPE_NS &&
2047         rd[i].record_type != GNUNET_GNS_RECORD_TYPE_CNAME &&
2048         rd[i].record_type != GNUNET_GNS_RECORD_MX &&
2049         rd[i].record_type != GNUNET_GNS_RECORD_TYPE_SOA)
2050     {
2051       p_rd[i].data = rd[i].data;
2052       continue;
2053     }
2054
2055     /**
2056      * for all those records we 'should'
2057      * also try to resolve the A/AAAA records (RFC1035)
2058      * This is a feature and not important
2059      */
2060
2061     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2062                "GNS_POSTPROCESS: Postprocessing\n");
2063
2064     if (strcmp(rh->name, "+") == 0)
2065       repl_string = rlh->name;
2066     else
2067       repl_string = rlh->name+strlen(rh->name)+1;
2068
2069     offset = 0;
2070     if (rd[i].record_type == GNUNET_GNS_RECORD_MX)
2071     {
2072       memcpy(new_mx_data, (char*)rd[i].data, sizeof(uint16_t));
2073       offset = sizeof(uint16_t);
2074       pos = new_mx_data+offset;
2075       expand_plus(&pos, (char*)rd[i].data+sizeof(uint16_t),
2076                   repl_string);
2077       offset += strlen(new_mx_data+sizeof(uint16_t))+1;
2078       p_rd[i].data = new_mx_data;
2079       p_rd[i].data_size = offset;
2080     }
2081     else if (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_SOA)
2082     {
2083       /* expand mname and rname */
2084       pos = new_soa_data;
2085       expand_plus(&pos, (char*)rd[i].data, repl_string);
2086       offset = strlen(new_soa_data)+1;
2087       pos = new_soa_data+offset;
2088       expand_plus(&pos, (char*)rd[i].data+offset, repl_string);
2089       offset += strlen(new_soa_data+offset)+1;
2090       /* cpy the 4 numbers serial refresh retry and expire */
2091       memcpy(new_soa_data+offset, (char*)rd[i].data+offset, sizeof(uint32_t)*5);
2092       offset += sizeof(uint32_t)*5;
2093       p_rd[i].data_size = offset;
2094       p_rd[i].data = new_soa_data;
2095     }
2096     else
2097     {
2098       pos = new_rr_data;
2099       expand_plus(&pos, (char*)rd[i].data, repl_string);
2100       p_rd[i].data_size = strlen(new_rr_data)+1;
2101       p_rd[i].data = new_rr_data;
2102     }
2103
2104   }
2105
2106   rlh->proc(rlh->proc_cls, rd_count, p_rd);
2107   GNUNET_free(rlh);
2108
2109 }
2110
2111 /**
2112  * Process DHT lookup result for record.
2113  *
2114  * @param cls the closure
2115  * @param rh resolver handle
2116  * @param rd_count number of results
2117  * @param rd record data
2118  */
2119 static void
2120 handle_record_dht(void* cls, struct ResolverHandle *rh,
2121                        unsigned int rd_count,
2122                        const struct GNUNET_NAMESTORE_RecordData *rd)
2123 {
2124   struct RecordLookupHandle* rlh;
2125
2126   rlh = (struct RecordLookupHandle*)cls;
2127   if (rd_count == 0)
2128   {
2129     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2130                "GNS_PHASE_REC-%d: No records for %s found in DHT. Aborting\n",
2131                rh->id, rh->name);
2132     /* give up, cannot resolve */
2133     finish_lookup(rh, rlh, 0, NULL);
2134     free_resolver_handle(rh);
2135     return;
2136   }
2137
2138   /* results found yay */
2139   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2140              "GNS_PHASE_REC-%d: Record resolved from DHT!", rh->id);
2141
2142   finish_lookup(rh, rlh, rd_count, rd);
2143   free_resolver_handle(rh);
2144
2145 }
2146
2147
2148
2149
2150 /**
2151  * Process namestore lookup result for record.
2152  *
2153  * @param cls the closure
2154  * @param rh resolver handle
2155  * @param rd_count number of results
2156  * @param rd record data
2157  */
2158 static void
2159 handle_record_ns (void* cls, struct ResolverHandle *rh,
2160                   unsigned int rd_count,
2161                   const struct GNUNET_NAMESTORE_RecordData *rd)
2162 {
2163   struct RecordLookupHandle* rlh;
2164   rlh = (struct RecordLookupHandle*) cls;
2165   if (rd_count == 0)
2166   {
2167     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2168                "GNS_PHASE_REC-%d: NS returned no records. (status: %d)!\n",
2169                rh->id,
2170                rh->status);
2171
2172     /**
2173      * There are 5 conditions that have to met for us to consult the DHT:
2174      * 1. The entry in the DHT is RSL_RECORD_EXPIRED AND
2175      * 2. No entry in the NS existed AND
2176      * 3. The zone queried is not the local resolver's zone AND
2177      * 4. The name that was looked up is '+'
2178      *    because if it was any other canonical name we either already queried
2179      *    the DHT for the authority in the authority lookup phase (and thus
2180      *    would already have an entry in the NS for the record)
2181      * 5. We are not in cache only mode
2182      */
2183     if (rh->status & (RSL_RECORD_EXPIRED | !RSL_RECORD_EXISTS) &&
2184         GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
2185                                      &rh->private_local_zone) &&
2186         (strcmp(rh->name, "+") == 0) &&
2187         (rh->only_cached == GNUNET_NO))
2188     {
2189       rh->proc = &handle_record_dht;
2190       resolve_record_dht(rh);
2191       return;
2192     }
2193     /* give up, cannot resolve */
2194     finish_lookup(rh, rlh, 0, NULL);
2195     free_resolver_handle(rh);
2196     return;
2197   }
2198
2199   /* results found yay */
2200   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2201              "GNS_PHASE_REC-%d: Record resolved from namestore!", rh->id);
2202
2203   finish_lookup(rh, rlh, rd_count, rd);
2204
2205   free_resolver_handle(rh);
2206
2207 }
2208
2209
2210 /**
2211  * Move one level up in the domain hierarchy and return the
2212  * passed top level domain.
2213  *
2214  * @param name the domain
2215  * @param dest the destination where the tld will be put
2216  */
2217 void
2218 pop_tld(char* name, char* dest)
2219 {
2220   uint32_t len;
2221
2222   if (is_canonical(name))
2223   {
2224     strcpy(dest, name);
2225     strcpy(name, "");
2226     return;
2227   }
2228
2229   for (len = strlen(name); len > 0; len--)
2230   {
2231     if (*(name+len) == '.')
2232       break;
2233   }
2234
2235   //Was canonical?
2236   if (len == 0)
2237     return;
2238
2239   name[len] = '\0';
2240
2241   strcpy(dest, (name+len+1));
2242 }
2243
2244 /**
2245  * Checks if name is in tld
2246  *
2247  * @param name the name to check
2248  * @param tld the TLD to check for
2249  * @return GNUNET_YES or GNUNET_NO
2250  */
2251 int
2252 is_tld(const char* name, const char* tld)
2253 {
2254   int offset = 0;
2255
2256   if (strlen(name) <= strlen(tld))
2257   {
2258     return GNUNET_NO;
2259   }
2260
2261   offset = strlen(name)-strlen(tld);
2262   if (strcmp(name+offset, tld) != 0)
2263   {
2264     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2265                "%s is not in .%s TLD\n", name, tld);
2266     return GNUNET_NO;
2267   }
2268   return GNUNET_YES;
2269 }
2270
2271 /**
2272  * DHT resolution for delegation finished. Processing result.
2273  *
2274  * @param cls the closure
2275  * @param rh resolver handle
2276  * @param rd_count number of results (always 0)
2277  * @param rd record data (always NULL)
2278  */
2279 static void
2280 handle_delegation_dht(void* cls, struct ResolverHandle *rh,
2281                           unsigned int rd_count,
2282                           const struct GNUNET_NAMESTORE_RecordData *rd)
2283 {
2284   struct RecordLookupHandle* rlh;
2285   rlh = (struct RecordLookupHandle*) cls;
2286
2287
2288   if (strcmp(rh->name, "") == 0)
2289   {
2290     if ((rlh->record_type == GNUNET_GNS_RECORD_PKEY))
2291     {
2292       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2293                  "GNS_PHASE_DELEGATE_DHT-%llu: Resolved queried PKEY via DHT.\n",
2294                  rh->id);
2295       finish_lookup(rh, rlh, rd_count, rd);
2296       free_resolver_handle(rh);
2297       return;
2298     }
2299     /* We resolved full name for delegation. resolving record */
2300     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2301      "GNS_PHASE_DELEGATE_DHT-%llu: Resolved full name for delegation via DHT.\n",
2302      rh->id);
2303     strcpy(rh->name, "+\0");
2304     rh->proc = &handle_record_ns;
2305     resolve_record_ns(rh);
2306     return;
2307   }
2308
2309   /**
2310    * we still have some left
2311    **/
2312   if (is_canonical(rh->name))
2313   {
2314     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2315              "GNS_PHASE_DELEGATE_DHT-%llu: Resolving canonical record %s in ns\n",
2316              rh->id,
2317              rh->name);
2318     rh->proc = &handle_record_ns;
2319     resolve_record_ns(rh);
2320     return;
2321   }
2322   /* give up, cannot resolve */
2323   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2324  "GNS_PHASE_DELEGATE_DHT-%llu: Cannot fully resolve delegation for %s via DHT!\n",
2325  rh->id, rh->name);
2326   finish_lookup(rh, rlh, 0, NULL);
2327   free_resolver_handle(rh);
2328 }
2329
2330
2331 /**
2332  * Start DHT lookup for a name -> PKEY (compare NS) record in
2333  * rh->authority's zone
2334  *
2335  * @param rh the pending gns query
2336  */
2337 static void
2338 resolve_delegation_dht(struct ResolverHandle *rh)
2339 {
2340   uint32_t xquery;
2341   struct GNUNET_CRYPTO_ShortHashCode name_hash;
2342   struct GNUNET_HashCode name_hash_double;
2343   struct GNUNET_HashCode zone_hash_double;
2344   struct GNUNET_HashCode lookup_key;
2345   struct ResolverHandle *rh_heap_root;
2346
2347   pop_tld(rh->name, rh->authority_name);
2348   GNUNET_CRYPTO_short_hash(rh->authority_name,
2349                      strlen(rh->authority_name),
2350                      &name_hash);
2351   GNUNET_CRYPTO_short_hash_double(&name_hash, &name_hash_double);
2352   GNUNET_CRYPTO_short_hash_double(&rh->authority, &zone_hash_double);
2353   GNUNET_CRYPTO_hash_xor(&name_hash_double, &zone_hash_double, &lookup_key);
2354
2355   rh->dht_heap_node = NULL;
2356
2357   if (rh->timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
2358   {
2359     //rh->timeout_task = GNUNET_SCHEDULER_add_delayed (DHT_LOOKUP_TIMEOUT,
2360     //                                          &dht_authority_lookup_timeout,
2361     //                                                   rh);
2362     rh->timeout_cont = &dht_authority_lookup_timeout;
2363     rh->timeout_cont_cls = rh;
2364   }
2365   else
2366   {
2367     if (max_allowed_background_queries <=
2368         GNUNET_CONTAINER_heap_get_size (dht_lookup_heap))
2369     {
2370       /* terminate oldest lookup */
2371       rh_heap_root = GNUNET_CONTAINER_heap_remove_root (dht_lookup_heap);
2372       GNUNET_DHT_get_stop(rh_heap_root->get_handle);
2373       rh_heap_root->dht_heap_node = NULL;
2374
2375       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2376         "GNS_PHASE_DELEGATE_DHT-%llu: Replacing oldest background query for %s\n",
2377         rh->id, rh_heap_root->authority_name);
2378
2379       rh_heap_root->proc(rh_heap_root->proc_cls,
2380                          rh_heap_root,
2381                          0,
2382                          NULL);
2383     }
2384     rh->dht_heap_node = GNUNET_CONTAINER_heap_insert (dht_lookup_heap,
2385                                          rh,
2386                                          GNUNET_TIME_absolute_get().abs_value);
2387   }
2388
2389   xquery = htonl(GNUNET_GNS_RECORD_PKEY);
2390
2391   GNUNET_assert(rh->get_handle == NULL);
2392   rh->get_handle = GNUNET_DHT_get_start(dht_handle,
2393                        GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
2394                        &lookup_key,
2395                        DHT_GNS_REPLICATION_LEVEL,
2396                        GNUNET_DHT_RO_NONE,
2397                        &xquery,
2398                        sizeof(xquery),
2399                        &process_delegation_result_dht,
2400                        rh);
2401
2402 }
2403
2404
2405 /**
2406  * Namestore resolution for delegation finished. Processing result.
2407  *
2408  * @param cls the closure
2409  * @param rh resolver handle
2410  * @param rd_count number of results (always 0)
2411  * @param rd record data (always NULL)
2412  */
2413 static void
2414 handle_delegation_ns(void* cls, struct ResolverHandle *rh,
2415                           unsigned int rd_count,
2416                           const struct GNUNET_NAMESTORE_RecordData *rd)
2417 {
2418   struct RecordLookupHandle* rlh;
2419   rlh = (struct RecordLookupHandle*) cls;
2420
2421   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2422              "GNS_PHASE_DELEGATE_NS-%llu: Resolution status: %d.\n",
2423              rh->id, rh->status);
2424
2425   if (strcmp(rh->name, "") == 0)
2426   {
2427     if (rlh->record_type == GNUNET_GNS_RECORD_PKEY)
2428     {
2429       GNUNET_assert(rd_count == 1);
2430       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2431                  "GNS_PHASE_DELEGATE_NS-%llu: Resolved queried PKEY in NS.\n",
2432                  rh->id);
2433       finish_lookup(rh, rlh, rd_count, rd);
2434       free_resolver_handle(rh);
2435       return;
2436     }
2437     /* We resolved full name for delegation. resolving record */
2438     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2439               "GNS_PHASE_DELEGATE_NS-%llu: Resolved full name for delegation.\n",
2440               rh->id);
2441
2442     if (rh->status & RSL_DELEGATE_VPN)
2443     {
2444       if (rlh->record_type == GNUNET_GNS_RECORD_VPN)
2445       {
2446         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2447                  "GNS_PHASE_DELEGATE_NS-%llu: Resolved queried VPNRR in NS.\n",
2448                  rh->id);
2449         finish_lookup(rh, rlh, rd_count, rd);
2450         free_resolver_handle(rh);
2451         return;
2452       }
2453       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2454              "GNS_PHASE_DELEGATE_NS-%llu: VPN delegation starting.\n",
2455              rh->id);
2456       GNUNET_assert (NULL != rd);
2457       rh->proc = &handle_record_vpn;
2458       resolve_record_vpn (rh, rd_count, rd);
2459     }
2460     else if (rh->status & RSL_DELEGATE_NS)
2461     {
2462       if (rlh->record_type == GNUNET_GNS_RECORD_TYPE_NS)
2463       {
2464         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2465                    "GNS_PHASE_DELEGATE_NS-%llu: Resolved queried NSRR in NS.\n",
2466                    rh->id);
2467         finish_lookup(rh, rlh, rd_count, rd);
2468         free_resolver_handle(rh);
2469         return;
2470       }
2471       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2472                  "GNS_PHASE_DELEGATE_NS-%llu: VPN delegation starting.\n",
2473                  rh->id);
2474       GNUNET_assert (NULL != rd);
2475       rh->proc = &handle_record_ns;
2476       resolve_record_dns (rh, rd_count, rd);
2477     }
2478     else
2479     {
2480       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2481                  "GNS_PHASE_DELEGATE_NS-%llu: Resolving record +\n",
2482                  rh->id);
2483       strcpy(rh->name, "+\0");
2484       rh->proc = &handle_record_ns;
2485       resolve_record_ns(rh);
2486     }
2487     return;
2488   }
2489
2490   /**
2491    * we still have some left
2492    * check if authority in ns is fresh
2493    * and exists
2494    * or we are authority
2495    **/
2496   if (((rh->status & RSL_RECORD_EXISTS) && (!(rh->status & RSL_RECORD_EXPIRED)))
2497       || !GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
2498                                        &rh->private_local_zone))
2499   {
2500     if (is_canonical(rh->name))
2501     {
2502       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2503                  "GNS_PHASE_DELEGATE_NS-%llu: Resolving canonical record %s\n",
2504                  rh->id,
2505                  rh->name);
2506       rh->proc = &handle_record_ns;
2507       resolve_record_ns(rh);
2508     }
2509     else
2510     {
2511       /* give up, cannot resolve */
2512       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2513           "GNS_PHASE_DELEGATE_NS-%llu: Cannot fully resolve delegation for %s!\n",
2514           rh->id,
2515           rh->name);
2516       finish_lookup(rh, rlh, rd_count, rd);
2517       //rlh->proc(rlh->proc_cls, 0, NULL);
2518     }
2519     return;
2520   }
2521
2522   if (rh->only_cached == GNUNET_YES)
2523   {
2524     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2525                "GNS_PHASE_DELEGATE_NS-%llu: Only cache resolution, no result\n",
2526                rh->id, rh->name);
2527     finish_lookup(rh, rlh, rd_count, rd);
2528     return;
2529   }
2530
2531   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2532       "GNS_PHASE_DELEGATE_NS-%llu: Trying to resolve delegation for %s via DHT\n",
2533       rh->id, rh->name);
2534   rh->proc = &handle_delegation_dht;
2535   resolve_delegation_dht(rh);
2536 }
2537
2538
2539
2540 /**
2541  * This is a callback function that should give us only PKEY
2542  * records. Used to query the namestore for the authority (PKEY)
2543  * for 'name'. It will recursively try to resolve the
2544  * authority for a given name from the namestore.
2545  *
2546  * @param cls the pending query
2547  * @param key the key of the zone we did the lookup
2548  * @param expiration expiration date of the record data set in the namestore
2549  * @param name the name for which we need an authority
2550  * @param rd_count the number of records with 'name'
2551  * @param rd the record data
2552  * @param signature the signature of the authority for the record data
2553  */
2554 static void
2555 process_delegation_result_ns(void* cls,
2556                    const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
2557                    struct GNUNET_TIME_Absolute expiration,
2558                    const char *name,
2559                    unsigned int rd_count,
2560                    const struct GNUNET_NAMESTORE_RecordData *rd,
2561                    const struct GNUNET_CRYPTO_RsaSignature *signature)
2562 {
2563   struct ResolverHandle *rh;
2564   struct GNUNET_TIME_Relative remaining_time;
2565   struct GNUNET_CRYPTO_ShortHashCode zone;
2566   char new_name[MAX_DNS_NAME_LENGTH];
2567
2568   rh = (struct ResolverHandle *)cls;
2569   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2570              "GNS_PHASE_DELEGATE_NS-%llu: Got %d records from authority lookup\n",
2571              rh->id, rd_count);
2572
2573   GNUNET_CRYPTO_short_hash(key,
2574                      sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
2575                      &zone);
2576   remaining_time = GNUNET_TIME_absolute_get_remaining (expiration);
2577
2578   rh->status = 0;
2579
2580   if (name != NULL)
2581   {
2582     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2583                "GNS_PHASE_DELEGATE_NS-%llu: Records with name %s exist.\n",
2584                rh->id, name);
2585     rh->status |= RSL_RECORD_EXISTS;
2586   }
2587
2588   if (remaining_time.rel_value == 0)
2589   {
2590     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2591                "GNS_PHASE_DELEGATE_NS-%llu: Record set %s expired.\n",
2592                rh->id, name);
2593     rh->status |= RSL_RECORD_EXPIRED;
2594   }
2595
2596   /**
2597    * No authority found in namestore.
2598    */
2599   if (rd_count == 0)
2600   {
2601     /**
2602      * We did not find an authority in the namestore
2603      */
2604
2605     /**
2606      * No PKEY in zone.
2607      * Promote this authority back to a name maybe it is
2608      * our record.
2609      */
2610     if (strcmp(rh->name, "") == 0)
2611     {
2612       /* simply promote back */
2613       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2614                  "GNS_PHASE_DELEGATE_NS-%llu: Promoting %s back to name\n",
2615                  rh->id, rh->authority_name);
2616       strcpy(rh->name, rh->authority_name);
2617     }
2618     else
2619     {
2620       /* add back to existing name */
2621       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2622                  "GNS_PHASE_DELEGATE_NS-%llu: Adding %s back to %s\n",
2623                  rh->id, rh->authority_name, rh->name);
2624       //memset(new_name, 0, strlen(rh->name) + strlen(rh->authority_name) + 2);
2625       GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
2626                       rh->name, rh->authority_name);
2627       //strcpy(new_name, rh->name);
2628       //strcpy(new_name+strlen(new_name), ".");
2629       //strcpy(new_name+strlen(new_name), rh->authority_name);
2630       strcpy(rh->name, new_name);
2631       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2632                  "GNS_PHASE_DELEGATE_NS-%llu: %s restored\n", rh->id, rh->name);
2633     }
2634     rh->proc(rh->proc_cls, rh, 0, NULL);
2635     return;
2636   }
2637
2638   /**
2639    * We found an authority that may be able to help us
2640    * move on with query
2641    * Note only 1 pkey should have been returned.. anything else would be strange
2642    */
2643   int i;
2644   for (i=0; i<rd_count;i++)
2645   {
2646     /**
2647      * Redirect via VPN
2648      */
2649     if (rd[i].record_type == GNUNET_GNS_RECORD_VPN)
2650     {
2651       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2652                  "GNS_PHASE_DELEGATE_NS-%llu: VPNRR found.\n",
2653                  rh->id);
2654       rh->status |= RSL_DELEGATE_VPN;
2655       rh->proc (rh->proc_cls, rh, rd_count, rd);
2656       return;
2657     }
2658
2659     /**
2660      * Redirect via NS
2661      * FIXME make optional
2662      */
2663     if (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_NS)
2664     {
2665       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2666                  "GNS_PHASE_DELEGATE_NS-%llu: NS found.\n",
2667                  rh->id);
2668       rh->status |= RSL_DELEGATE_NS;
2669       rh->proc (rh->proc_cls, rh, rd_count, rd);
2670     }
2671
2672     if (rd[i].record_type != GNUNET_GNS_RECORD_PKEY)
2673       continue;
2674
2675     if (ignore_pending_records &&
2676         (rd[i].flags & GNUNET_NAMESTORE_RF_PENDING))
2677     {
2678       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2679       "GNS_PHASE_DELEGATE_NS-%llu: PKEY for %s is pending user confirmation.\n",
2680         rh->id,
2681         name);
2682       continue;
2683     }
2684
2685     if ((GNUNET_TIME_absolute_get_remaining (rd[i].expiration)).rel_value
2686          == 0)
2687     {
2688       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2689                  "GNS_PHASE_DELEGATE_NS-%llu: This pkey is expired.\n",
2690                  rh->id);
2691       if (remaining_time.rel_value == 0)
2692       {
2693         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2694                    "GNS_PHASE_DELEGATE_NS-%llu: This dht entry is expired.\n",
2695                    rh->id);
2696         rh->authority_chain_head->fresh = 0;
2697         rh->proc(rh->proc_cls, rh, 0, NULL);
2698         return;
2699       }
2700
2701       continue;
2702     }
2703
2704     /**
2705      * Resolve rest of query with new authority
2706      */
2707     GNUNET_assert(rd[i].record_type == GNUNET_GNS_RECORD_PKEY);
2708     memcpy(&rh->authority, rd[i].data,
2709            sizeof(struct GNUNET_CRYPTO_ShortHashCode));
2710     struct AuthorityChain *auth = GNUNET_malloc(sizeof(struct AuthorityChain));
2711     auth->zone = rh->authority;
2712     memset(auth->name, 0, strlen(rh->authority_name)+1);
2713     strcpy(auth->name, rh->authority_name);
2714     GNUNET_CONTAINER_DLL_insert (rh->authority_chain_head,
2715                                  rh->authority_chain_tail,
2716                                  auth);
2717
2718     /** try to import pkey if private key available
2719      * TODO: Only import last one?
2720      */
2721     //if (rh->priv_key && (name != NULL) && is_canonical (rh->name))
2722     //  process_discovered_authority((char*)name, auth->zone,
2723     //                               rh->authority_chain_tail->zone,
2724     //                               rh->priv_key);
2725     /**
2726      * We are done with PKEY resolution if name is empty
2727      * else resolve again with new authority
2728      */
2729     if (strcmp(rh->name, "") == 0)
2730       rh->proc(rh->proc_cls, rh, rd_count, rd);
2731     else
2732       resolve_delegation_ns(rh);
2733     return;
2734   }
2735
2736   /**
2737    * no answers found
2738    */
2739   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2740     "GNS_PHASE_DELEGATE_NS-%llu: Authority lookup and no PKEY...\n", rh->id);
2741   /**
2742    * If we have found some records for the LAST label
2743    * we return the results. Else null.
2744    */
2745   if (strcmp(rh->name, "") == 0)
2746   {
2747     /* Start shortening */
2748     if ((rh->priv_key != NULL) && is_canonical (rh->name))
2749     {
2750       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2751               "GNS_PHASE_DELEGATE_NS-%llu: Trying to shorten authority chain\n",
2752               rh->id);
2753       start_shorten (rh->authority_chain_tail,
2754                     rh->priv_key);
2755     }
2756     /* simply promote back */
2757     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2758                "GNS_PHASE_DELEGATE_NS-%llu: Promoting %s back to name\n",
2759                rh->id, rh->authority_name);
2760     strcpy(rh->name, rh->authority_name);
2761     rh->proc(rh->proc_cls, rh, rd_count, rd);
2762   }
2763   else
2764   {
2765     rh->proc(rh->proc_cls, rh, 0, NULL);
2766   }
2767 }
2768
2769
2770 /**
2771  * Resolve the delegation chain for the request in our namestore
2772  *
2773  * @param rh the resolver handle
2774  */
2775 static void
2776 resolve_delegation_ns(struct ResolverHandle *rh)
2777 {
2778   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2779              "GNS_PHASE_DELEGATE_NS-%llu: Resolving delegation for %s\n",
2780              rh->id, rh->name);
2781   pop_tld(rh->name, rh->authority_name);
2782   GNUNET_NAMESTORE_lookup_record(namestore_handle,
2783                                  &rh->authority,
2784                                  rh->authority_name,
2785                                  GNUNET_GNS_RECORD_ANY,
2786                                  &process_delegation_result_ns,
2787                                  rh);
2788
2789 }
2790
2791
2792 /**
2793  * Lookup of a record in a specific zone
2794  * calls lookup result processor on result
2795  *
2796  * @param zone the root zone
2797  * @param pzone the private local zone
2798  * @param record_type the record type to look up
2799  * @param name the name to look up
2800  * @param key a private key for use with PSEU import (can be NULL)
2801  * @param timeout timeout for resolution
2802  * @param only_cached GNUNET_NO to only check locally not DHT for performance
2803  * @param proc the processor to call on result
2804  * @param cls the closure to pass to proc
2805  */
2806 void
2807 gns_resolver_lookup_record(struct GNUNET_CRYPTO_ShortHashCode zone,
2808                            struct GNUNET_CRYPTO_ShortHashCode pzone,
2809                            uint32_t record_type,
2810                            const char* name,
2811                            struct GNUNET_CRYPTO_RsaPrivateKey *key,
2812                            struct GNUNET_TIME_Relative timeout,
2813                            int only_cached,
2814                            RecordLookupProcessor proc,
2815                            void* cls)
2816 {
2817   struct ResolverHandle *rh;
2818   struct RecordLookupHandle* rlh;
2819   char string_hash[MAX_DNS_LABEL_LENGTH];
2820   char nzkey[MAX_DNS_LABEL_LENGTH];
2821   char* nzkey_ptr = nzkey;
2822
2823   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2824               "Starting resolution for %s (type=%d)!\n",
2825               name, record_type);
2826
2827
2828   if (is_canonical((char*)name) && (strcmp(GNUNET_GNS_TLD, name) != 0))
2829   {
2830     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2831                 "%s is canonical and not gnunet -> cannot resolve!\n", name);
2832     proc(cls, 0, NULL);
2833     return;
2834   }
2835
2836   rlh = GNUNET_malloc(sizeof(struct RecordLookupHandle));
2837   rh = GNUNET_malloc(sizeof (struct ResolverHandle));
2838
2839   rh->authority = zone;
2840   rh->id = rid++;
2841   rh->proc_cls = rlh;
2842   rh->priv_key = key;
2843   rh->timeout = timeout;
2844   rh->get_handle = NULL;
2845   rh->private_local_zone = pzone;
2846   rh->only_cached = only_cached;
2847
2848   if (NULL == key)
2849   {
2850     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2851                 "No shorten key for resolution\n");
2852   }
2853
2854   if (timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
2855   {
2856     /*
2857      * Set timeout for authority lookup phase to 1/2
2858      */
2859     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2860                 "Timeout for lookup set to %ds\n", rh->timeout.rel_value);
2861     rh->timeout_task = GNUNET_SCHEDULER_add_delayed(
2862                                 GNUNET_TIME_relative_divide(timeout, 2),
2863                                                 &handle_lookup_timeout,
2864                                                 rh);
2865     rh->timeout_cont = &dht_authority_lookup_timeout;
2866     rh->timeout_cont_cls = rh;
2867   }
2868   else
2869   {
2870     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "No timeout for query!\n");
2871     rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2872   }
2873
2874   if (strcmp(GNUNET_GNS_TLD, name) == 0)
2875   {
2876     /**
2877      * Only 'gnunet' given
2878      */
2879     strcpy(rh->name, "\0");
2880   }
2881   else
2882   {
2883     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2884                 "Checking for TLD...\n");
2885     if (is_zkey_tld(name) == GNUNET_YES)
2886     {
2887       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2888                   "TLD is zkey\n");
2889       /**
2890        * This is a zkey tld
2891        * build hash and use as initial authority
2892        */
2893       memset(rh->name, 0,
2894              strlen(name)-strlen(GNUNET_GNS_TLD_ZKEY));
2895       memcpy(rh->name, name,
2896              strlen(name)-strlen(GNUNET_GNS_TLD_ZKEY) - 1);
2897       pop_tld(rh->name, string_hash);
2898
2899       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2900                   "ZKEY is %s!\n", string_hash);
2901
2902       GNUNET_STRINGS_utf8_toupper(string_hash, &nzkey_ptr);
2903
2904       if (GNUNET_OK != GNUNET_CRYPTO_short_hash_from_string(nzkey,
2905                                                       &rh->authority))
2906       {
2907         GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2908                     "Cannot convert ZKEY %s to hash!\n", string_hash);
2909         GNUNET_free(rh);
2910         GNUNET_free(rlh);
2911         proc(cls, 0, NULL);
2912         return;
2913       }
2914
2915     }
2916     else
2917     {
2918       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2919                   "TLD is gnunet\n");
2920       /**
2921        * Presumably GNUNET tld
2922        */
2923       memset(rh->name, 0,
2924              strlen(name)-strlen(GNUNET_GNS_TLD));
2925       memcpy(rh->name, name,
2926              strlen(name)-strlen(GNUNET_GNS_TLD) - 1);
2927     }
2928   }
2929
2930   /**
2931    * Initialize authority chain
2932    */
2933   rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
2934   rh->authority_chain_head->prev = NULL;
2935   rh->authority_chain_head->next = NULL;
2936   rh->authority_chain_tail = rh->authority_chain_head;
2937   rh->authority_chain_head->zone = rh->authority;
2938
2939   /**
2940    * Copy original query into lookup handle
2941    */
2942   rlh->record_type = record_type;
2943   memset(rlh->name, 0, strlen(name) + 1);
2944   strcpy(rlh->name, name);
2945   rlh->proc = proc;
2946   rlh->proc_cls = cls;
2947
2948   rh->proc = &handle_delegation_ns;
2949   resolve_delegation_ns(rh);
2950 }
2951
2952 /******** END Record Resolver ***********/
2953
2954 /**
2955  * Callback calles by namestore for a zone to name
2956  * result
2957  *
2958  * @param cls the closure
2959  * @param zone_key the zone we queried
2960  * @param expire the expiration time of the name
2961  * @param name the name found or NULL
2962  * @param rd_len number of records for the name
2963  * @param rd the record data (PKEY) for the name
2964  * @param signature the signature for the record data
2965  */
2966 static void
2967 process_zone_to_name_shorten_root (void *cls,
2968                  const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
2969                  struct GNUNET_TIME_Absolute expire,
2970                  const char *name,
2971                  unsigned int rd_len,
2972                  const struct GNUNET_NAMESTORE_RecordData *rd,
2973                  const struct GNUNET_CRYPTO_RsaSignature *signature);
2974
2975
2976 /**
2977  * Callback called by namestore for a zone to name
2978  * result
2979  *
2980  * @param cls the closure
2981  * @param zone_key the zone we queried
2982  * @param expire the expiration time of the name
2983  * @param name the name found or NULL
2984  * @param rd_len number of records for the name
2985  * @param rd the record data (PKEY) for the name
2986  * @param signature the signature for the record data
2987  */
2988 static void
2989 process_zone_to_name_shorten_shorten (void *cls,
2990                  const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
2991                  struct GNUNET_TIME_Absolute expire,
2992                  const char *name,
2993                  unsigned int rd_len,
2994                  const struct GNUNET_NAMESTORE_RecordData *rd,
2995                  const struct GNUNET_CRYPTO_RsaSignature *signature)
2996 {
2997   struct ResolverHandle *rh = (struct ResolverHandle *)cls;
2998   struct NameShortenHandle* nsh = (struct NameShortenHandle*)rh->proc_cls;
2999   struct AuthorityChain *next_authority;
3000
3001   char result[MAX_DNS_NAME_LENGTH];
3002   char tmp_name[MAX_DNS_NAME_LENGTH];
3003   size_t answer_len;
3004
3005   /* we found a match in our own root zone */
3006   if (rd_len != 0)
3007   {
3008     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3009                "result strlen %d\n", strlen(name));
3010     answer_len = strlen(rh->name) + strlen(name) + strlen(GNUNET_GNS_TLD) + 3;
3011     memset(result, 0, answer_len);
3012
3013     if (strlen(rh->name) > 0)
3014     {
3015       sprintf (result, "%s.%s.%s.%s.%s",
3016                rh->name, name,
3017                nsh->shorten_zone_name, nsh->private_zone_name,
3018                GNUNET_GNS_TLD);
3019     }
3020     else
3021     {
3022       sprintf (result, "%s.%s.%s.%s", name,
3023                nsh->shorten_zone_name, nsh->private_zone_name,
3024                GNUNET_GNS_TLD);
3025     }
3026
3027     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3028                "Found shorten result %s\n", result);
3029     if (strlen (nsh->result) > strlen (result))
3030       strcpy (nsh->result, result);
3031   }
3032   else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3033                                         nsh->shorten_zone) == 0)
3034   {
3035     /**
3036      * This is our zone append .gnunet unless name is empty
3037      * (it shouldn't be, usually FIXME what happens if we
3038      * shorten to our zone to a "" record??)
3039      */
3040
3041     sprintf (result, "%s.%s.%s.%s",
3042              rh->name,
3043              nsh->shorten_zone_name, nsh->private_zone_name,
3044              GNUNET_GNS_TLD);
3045     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3046                "Our zone: Found %s as shorten result\n", result);
3047
3048     if (strlen (nsh->result) > strlen (result))
3049       strcpy (nsh->result, result);
3050     //nsh->proc(nsh->proc_cls, result);
3051     //GNUNET_free(nsh);
3052     //free_resolver_handle(rh);
3053     //return;
3054   }
3055
3056
3057   /**
3058    * No PSEU found.
3059    * continue with next authority if exists
3060    */
3061   if ((rh->authority_chain_head->next == NULL))
3062   {
3063     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3064                 "Sending %s as shorten result\n", nsh->result);
3065     nsh->proc(nsh->proc_cls, nsh->result);
3066     GNUNET_free (nsh);
3067     free_resolver_handle (rh);
3068     return;
3069   }
3070   next_authority = rh->authority_chain_head;
3071
3072   GNUNET_snprintf(tmp_name, MAX_DNS_NAME_LENGTH,
3073                   "%s.%s", rh->name, next_authority->name);
3074
3075   strcpy(rh->name, tmp_name);
3076   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3077              "No PSEU found for authority %s. Promoting back: %s\n",
3078              next_authority->name, rh->name);
3079
3080   GNUNET_CONTAINER_DLL_remove(rh->authority_chain_head,
3081                             rh->authority_chain_tail,
3082                             next_authority);
3083
3084   GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3085                                  &rh->authority_chain_tail->zone,
3086                                  &rh->authority_chain_head->zone,
3087                                  &process_zone_to_name_shorten_root,
3088                                  rh);
3089 }
3090
3091 /**
3092  * Callback calles by namestore for a zone to name
3093  * result
3094  *
3095  * @param cls the closure
3096  * @param zone_key the zone we queried
3097  * @param expire the expiration time of the name
3098  * @param name the name found or NULL
3099  * @param rd_len number of records for the name
3100  * @param rd the record data (PKEY) for the name
3101  * @param signature the signature for the record data
3102  */
3103 static void
3104 process_zone_to_name_shorten_private (void *cls,
3105                  const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
3106                  struct GNUNET_TIME_Absolute expire,
3107                  const char *name,
3108                  unsigned int rd_len,
3109                  const struct GNUNET_NAMESTORE_RecordData *rd,
3110                  const struct GNUNET_CRYPTO_RsaSignature *signature)
3111 {
3112   struct ResolverHandle *rh = (struct ResolverHandle *)cls;
3113   struct NameShortenHandle* nsh = (struct NameShortenHandle*)rh->proc_cls;
3114   struct AuthorityChain *next_authority;
3115
3116   char result[MAX_DNS_NAME_LENGTH];
3117   char tmp_name[MAX_DNS_NAME_LENGTH];
3118   size_t answer_len;
3119
3120   /* we found a match in our own root zone */
3121   if (rd_len != 0)
3122   {
3123     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3124                "result strlen %d\n", strlen(name));
3125     answer_len = strlen(rh->name) + strlen(name) + strlen(GNUNET_GNS_TLD) + 3;
3126     memset(result, 0, answer_len);
3127
3128     if (strlen(rh->name) > 0)
3129     {
3130       sprintf (result, "%s.%s.%s", rh->name, name, GNUNET_GNS_TLD);
3131     }
3132     else
3133     {
3134       sprintf (result, "%s.%s", name, GNUNET_GNS_TLD);
3135     }
3136
3137     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3138                "Found shorten result %s\n", result);
3139     if (strlen (nsh->result) > strlen (result))
3140       strcpy (nsh->result, result);
3141   }
3142   else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3143                                         nsh->private_zone) == 0)
3144   {
3145     /**
3146      * This is our zone append .gnunet unless name is empty
3147      * (it shouldn't be, usually FIXME what happens if we
3148      * shorten to our zone to a "" record??)
3149      */
3150
3151     sprintf (result, "%s.%s.%s",
3152              rh->name, nsh->private_zone_name, GNUNET_GNS_TLD);
3153     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3154                "Our private zone: Found %s as shorten result %s\n", result);
3155     if (strlen (nsh->result) > strlen (result))
3156       strcpy (nsh->result, result);
3157   }
3158
3159   if (nsh->shorten_zone != NULL)
3160   {
3161     /* backtrack authorities for names in priv zone */
3162     GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3163                                    nsh->shorten_zone,
3164                                    &rh->authority_chain_head->zone,
3165                                    &process_zone_to_name_shorten_shorten,
3166                                    rh);
3167   }
3168   else
3169   {
3170     /**
3171      * No PSEU found.
3172      * continue with next authority if exists
3173      */
3174     if ((rh->authority_chain_head->next == NULL))
3175     {
3176       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3177                  "Sending %s as shorten result\n", nsh->result);
3178       nsh->proc(nsh->proc_cls, nsh->result);
3179       GNUNET_free(nsh);
3180       free_resolver_handle(rh);
3181       return;
3182     }
3183     next_authority = rh->authority_chain_head;
3184
3185     GNUNET_snprintf(tmp_name, MAX_DNS_NAME_LENGTH,
3186                     "%s.%s", rh->name, next_authority->name);
3187
3188     strcpy(rh->name, tmp_name);
3189     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3190                "No PSEU found for authority %s. Promoting back: %s\n",
3191                next_authority->name, rh->name);
3192
3193     GNUNET_CONTAINER_DLL_remove(rh->authority_chain_head,
3194                               rh->authority_chain_tail,
3195                               next_authority);
3196
3197     GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3198                                    &rh->authority_chain_tail->zone,
3199                                    &rh->authority_chain_head->zone,
3200                                    &process_zone_to_name_shorten_root,
3201                                    rh);
3202   }
3203 }
3204
3205 /**
3206  * Callback calles by namestore for a zone to name
3207  * result
3208  *
3209  * @param cls the closure
3210  * @param zone_key the zone we queried
3211  * @param expire the expiration time of the name
3212  * @param name the name found or NULL
3213  * @param rd_len number of records for the name
3214  * @param rd the record data (PKEY) for the name
3215  * @param signature the signature for the record data
3216  */
3217 static void
3218 process_zone_to_name_shorten_root (void *cls,
3219                  const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
3220                  struct GNUNET_TIME_Absolute expire,
3221                  const char *name,
3222                  unsigned int rd_len,
3223                  const struct GNUNET_NAMESTORE_RecordData *rd,
3224                  const struct GNUNET_CRYPTO_RsaSignature *signature)
3225 {
3226   struct ResolverHandle *rh = (struct ResolverHandle *)cls;
3227   struct NameShortenHandle* nsh = (struct NameShortenHandle*)rh->proc_cls;
3228   struct AuthorityChain *next_authority;
3229
3230   char result[MAX_DNS_NAME_LENGTH];
3231   char tmp_name[MAX_DNS_NAME_LENGTH];
3232   size_t answer_len;
3233
3234   /* we found a match in our own root zone */
3235   if (rd_len != 0)
3236   {
3237     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3238                "result strlen %d\n", strlen(name));
3239     answer_len = strlen(rh->name) + strlen(name) + strlen(GNUNET_GNS_TLD) + 3;
3240     memset(result, 0, answer_len);
3241
3242     if (strlen(rh->name) > 0)
3243     {
3244       sprintf (result, "%s.%s.%s", rh->name, name, GNUNET_GNS_TLD);
3245     }
3246     else
3247     {
3248       sprintf (result, "%s.%s", name, GNUNET_GNS_TLD);
3249     }
3250
3251     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3252                "Found shorten result %s\n", result);
3253     if (strlen (nsh->result) > strlen (result))
3254       strcpy (nsh->result, result);
3255   }
3256   else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3257                                         nsh->root_zone) == 0)
3258   {
3259     /**
3260      * This is our zone append .gnunet unless name is empty
3261      * (it shouldn't be, usually FIXME what happens if we
3262      * shorten to our zone to a "" record??)
3263      */
3264
3265     sprintf (result, "%s.%s", rh->name, GNUNET_GNS_TLD);
3266     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3267                "Our zone: Found %s as shorten result\n", result);
3268     if (strlen (nsh->result) > strlen (result))
3269       strcpy (nsh->result, result);
3270   }
3271
3272   if (nsh->private_zone != NULL)
3273   {
3274     /* backtrack authorities for names in priv zone */
3275     GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3276                                    nsh->private_zone,
3277                                    &rh->authority_chain_head->zone,
3278                                    &process_zone_to_name_shorten_private,
3279                                    rh);
3280   }
3281   else
3282   {
3283     /**
3284      * No PSEU found.
3285      * continue with next authority if exists
3286      */
3287     if ((rh->authority_chain_head->next == NULL))
3288     {
3289       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3290                  "Sending %s as shorten result\n", nsh->result);
3291       nsh->proc(nsh->proc_cls, nsh->result);
3292       GNUNET_free(nsh);
3293       free_resolver_handle(rh);
3294       return;
3295     }
3296     next_authority = rh->authority_chain_head;
3297
3298     GNUNET_snprintf(tmp_name, MAX_DNS_NAME_LENGTH,
3299                     "%s.%s", rh->name, next_authority->name);
3300
3301     strcpy(rh->name, tmp_name);
3302     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3303                "No PSEU found for authority %s. Promoting back: %s\n",
3304                next_authority->name, rh->name);
3305
3306     GNUNET_CONTAINER_DLL_remove(rh->authority_chain_head,
3307                               rh->authority_chain_tail,
3308                               next_authority);
3309
3310     GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3311                                    &rh->authority_chain_tail->zone,
3312                                    &rh->authority_chain_head->zone,
3313                                    &process_zone_to_name_shorten_root,
3314                                    rh);
3315   }
3316 }
3317
3318
3319 /**
3320  * Process result from namestore delegation lookup
3321  * for shorten operation
3322  *
3323  * @param cls the client shorten handle
3324  * @param rh the resolver handle
3325  * @param rd_count number of results (0)
3326  * @param rd data (NULL)
3327  */
3328 void
3329 handle_delegation_ns_shorten(void* cls,
3330                       struct ResolverHandle *rh,
3331                       uint32_t rd_count,
3332                       const struct GNUNET_NAMESTORE_RecordData *rd)
3333 {
3334   struct NameShortenHandle *nsh;
3335   char result[MAX_DNS_NAME_LENGTH];
3336
3337   nsh = (struct NameShortenHandle *)cls;
3338
3339   /**
3340    * At this point rh->name contains the part of the name
3341    * that we do not have a PKEY in our namestore to resolve.
3342    * The authority chain in the resolver handle is now
3343    * useful to backtrack if needed
3344    */
3345
3346   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3347              "PKEY resolved as far as possible in ns up to %s!\n", rh->name);
3348   memset(result, 0, sizeof (result));
3349
3350   if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3351                                    nsh->root_zone) == 0)
3352   {
3353     /**
3354      * This is our zone append .gnunet unless name is empty
3355      * (it shouldn't be, usually FIXME what happens if we
3356      * shorten to our zone to a "" record??)
3357      */
3358
3359     sprintf (result, "%s.%s", rh->name, GNUNET_GNS_TLD);
3360     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3361                "Our zone: Found %s as shorten result\n", result);
3362
3363     if (strlen (nsh->result) > strlen (result))
3364       strcpy (nsh->result, result);
3365
3366   }
3367   else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3368                                         nsh->private_zone) == 0)
3369   {
3370     /**
3371      * This is our zone append .gnunet unless name is empty
3372      * (it shouldn't be, usually FIXME what happens if we
3373      * shorten to our zone to a "" record??)
3374      */
3375
3376     sprintf (result, "%s.%s.%s",
3377              rh->name, nsh->private_zone_name, GNUNET_GNS_TLD);
3378     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3379                "Our zone: Found %s as shorten result %s\n", result);
3380
3381     if (strlen (nsh->result) > strlen (result))
3382       strcpy (nsh->result, result);
3383   }
3384   else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3385                                         nsh->shorten_zone) == 0)
3386   {
3387     /**
3388      * This is our zone append .gnunet unless name is empty
3389      * (it shouldn't be, usually FIXME what happens if we
3390      * shorten to our zone to a "" record??)
3391      */
3392
3393     sprintf (result, "%s.%s.%s",
3394              rh->name, nsh->private_zone_name, GNUNET_GNS_TLD);
3395     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3396                "Our zone: Found %s as shorten result\n", result);
3397
3398     if (strlen (nsh->result) > strlen (result))
3399       strcpy (nsh->result, result);
3400   }
3401
3402
3403   /* backtrack authorities for names */
3404   GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3405                                  nsh->root_zone,
3406                                  &rh->authority_chain_head->zone,
3407                                  &process_zone_to_name_shorten_root,
3408                                  rh);
3409
3410 }
3411
3412
3413 /**
3414  * Callback calles by namestore for a zone to name
3415  * result
3416  *
3417  * @param cls the closure
3418  * @param zone_key the zone we queried
3419  * @param expire the expiration time of the name
3420  * @param name the name found or NULL
3421  * @param rd_len number of records for the name
3422  * @param rd the record data (PKEY) for the name
3423  * @param signature the signature for the record data
3424  */
3425 static void
3426 process_zone_to_name_zkey(void *cls,
3427                  const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
3428                  struct GNUNET_TIME_Absolute expire,
3429                  const char *name,
3430                  unsigned int rd_len,
3431                  const struct GNUNET_NAMESTORE_RecordData *rd,
3432                  const struct GNUNET_CRYPTO_RsaSignature *signature)
3433 {
3434   struct ResolverHandle *rh = cls;
3435   struct NameShortenHandle *nsh = rh->proc_cls;
3436   struct GNUNET_CRYPTO_ShortHashAsciiEncoded enc;
3437   char new_name[MAX_DNS_NAME_LENGTH];
3438
3439   /* zkey not in our zone */
3440   if (name == NULL)
3441   {
3442     /**
3443      * In this case we have not given this PKEY a name (yet)
3444      * It is either just not in our zone or not even cached
3445      * Since we do not know at this point we will not try to shorten
3446      * because PKEY import will happen if the user follows the zkey
3447      * link.
3448      */
3449     GNUNET_CRYPTO_short_hash_to_enc ((struct GNUNET_CRYPTO_ShortHashCode*)rd,
3450                                      &enc);
3451     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3452                "No name found for zkey %s returning verbatim!\n", enc);
3453     if (strcmp(rh->name, "") != 0)
3454       GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s.%s",
3455                       rh->name, enc, GNUNET_GNS_TLD_ZKEY);
3456     else
3457       GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
3458                       enc, GNUNET_GNS_TLD_ZKEY);
3459
3460     strcpy (nsh->result, new_name);
3461
3462     nsh->proc(nsh->proc_cls, new_name);
3463     GNUNET_free(nsh);
3464     free_resolver_handle(rh);
3465     return;
3466   }
3467
3468   if (strcmp(rh->name, "") != 0)
3469     GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
3470                     rh->name, name);
3471   else
3472     strcpy(new_name, name);
3473
3474   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3475              "Continue shorten for %s!\n", new_name);
3476
3477   strcpy(rh->name, new_name);
3478
3479   rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
3480   rh->authority_chain_tail = rh->authority_chain_head;
3481   rh->authority_chain_head->zone = rh->authority;
3482
3483
3484   /* Start delegation resolution in our namestore */
3485   resolve_delegation_ns(rh);
3486 }
3487
3488
3489 /**
3490  * Shorten api from resolver
3491  *
3492  * @param zone the root zone to use
3493  * @param pzone the private zone to use
3494  * @param szone the shorten zone to use
3495  * @param name the name to shorten
3496  * @param private_zone_name name of the private zone
3497  * @param shorten_zone_name name of the shorten zone
3498  * @param proc the processor to call with result
3499  * @param proc_cls closure to pass to proc
3500  */
3501 void
3502 gns_resolver_shorten_name (struct GNUNET_CRYPTO_ShortHashCode *zone,
3503                            struct GNUNET_CRYPTO_ShortHashCode *pzone,
3504                            struct GNUNET_CRYPTO_ShortHashCode *szone,
3505                            const char* name,
3506                            const char* private_zone_name,
3507                            const char* shorten_zone_name,
3508                            ShortenResultProcessor proc,
3509                            void* proc_cls)
3510 {
3511   struct ResolverHandle *rh;
3512   struct NameShortenHandle *nsh;
3513   char string_hash[MAX_DNS_LABEL_LENGTH];
3514   struct GNUNET_CRYPTO_ShortHashCode zkey;
3515   char nzkey[MAX_DNS_LABEL_LENGTH];
3516   char* nzkey_ptr = nzkey;
3517
3518
3519   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3520               "Starting shorten for %s!\n", name);
3521
3522   if (is_canonical ((char*)name))
3523   {
3524     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3525                 "%s is canonical. Returning verbatim\n", name);
3526     proc (proc_cls, name);
3527     return;
3528   }
3529
3530   nsh = GNUNET_malloc (sizeof (struct NameShortenHandle));
3531
3532   nsh->proc = proc;
3533   nsh->proc_cls = proc_cls;
3534   nsh->root_zone = zone;
3535   nsh->private_zone = pzone;
3536   nsh->shorten_zone = szone;
3537   strcpy (nsh->private_zone_name, private_zone_name);
3538   strcpy (nsh->shorten_zone_name, shorten_zone_name);
3539   strcpy (nsh->result, name);
3540
3541   rh = GNUNET_malloc (sizeof (struct ResolverHandle));
3542   rh->authority = *zone;
3543   rh->id = rid++;
3544   rh->priv_key = NULL;
3545   rh->proc = &handle_delegation_ns_shorten;
3546   rh->proc_cls = nsh;
3547   rh->id = rid++;
3548   rh->private_local_zone = *zone;
3549
3550   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3551                 "Checking for TLD...\n");
3552   if (is_zkey_tld (name) == GNUNET_YES)
3553   {
3554     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3555                 "TLD is zkey\n");
3556     /**
3557      * This is a zkey tld
3558      * build hash and use as initial authority
3559      * FIXME sscanf
3560      */
3561     memset (rh->name, 0,
3562             strlen (name)-strlen (GNUNET_GNS_TLD_ZKEY));
3563     memcpy (rh->name, name,
3564             strlen(name)-strlen (GNUNET_GNS_TLD_ZKEY) - 1);
3565     pop_tld (rh->name, string_hash);
3566
3567     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3568                 "ZKEY is %s!\n", string_hash);
3569
3570     GNUNET_STRINGS_utf8_toupper (string_hash, &nzkey_ptr);
3571
3572     if (GNUNET_OK != GNUNET_CRYPTO_short_hash_from_string (nzkey,
3573                                                            &zkey))
3574     {
3575       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3576                   "Cannot convert ZKEY %s to hash!\n", nzkey);
3577       GNUNET_free (rh);
3578       GNUNET_free (nsh);
3579       proc (proc_cls, name);
3580       return;
3581     }
3582
3583     GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3584                                    zone, //ours
3585                                    &zkey,
3586                                    &process_zone_to_name_zkey,
3587                                    rh);
3588     return;
3589
3590   }
3591   else
3592   {
3593     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3594                 "TLD is gnunet\n");
3595     /**
3596      * Presumably GNUNET tld
3597      */
3598     memset (rh->name, 0,
3599             strlen (name)-strlen (GNUNET_GNS_TLD));
3600     memcpy (rh->name, name,
3601             strlen (name)-strlen (GNUNET_GNS_TLD) - 1);
3602   }
3603
3604   rh->authority_chain_head = GNUNET_malloc (sizeof (struct AuthorityChain));
3605   rh->authority_chain_tail = rh->authority_chain_head;
3606   rh->authority_chain_head->zone = *zone;
3607
3608
3609   /* Start delegation resolution in our namestore */
3610   resolve_delegation_ns (rh);
3611 }
3612
3613 /*********** END NAME SHORTEN ********************/
3614
3615
3616 /**
3617  * Process result from namestore delegation lookup
3618  * for get authority operation
3619  *
3620  * @param cls the client get auth handle
3621  * @param rh the resolver handle
3622  * @param rd_count number of results (0)
3623  * @param rd data (NULL)
3624  */
3625 void
3626 handle_delegation_result_ns_get_auth(void* cls,
3627                       struct ResolverHandle *rh,
3628                       uint32_t rd_count,
3629                       const struct GNUNET_NAMESTORE_RecordData *rd)
3630 {
3631   struct GetNameAuthorityHandle* nah;
3632   char result[MAX_DNS_NAME_LENGTH];
3633   size_t answer_len;
3634
3635   nah = (struct GetNameAuthorityHandle*) rh->proc_cls;
3636
3637   /**
3638    * At this point rh->name contains the part of the name
3639    * that we do not have a PKEY in our namestore to resolve.
3640    * The authority chain in the resolver handle is now
3641    * useful to backtrack if needed
3642    */
3643
3644   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3645              "PKEY resolved as far as possible in ns up to %s!\n", rh->name);
3646
3647   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3648              "Building response!\n");
3649   if (is_canonical(rh->name))
3650   {
3651     /**
3652      * We successfully resolved the authority in the ns
3653      * FIXME for our purposes this is fine
3654      * but maybe we want to have an api that also looks
3655      * into the dht (i.e. option in message)
3656      **/
3657     if (strlen(rh->name) > strlen(nah->name))
3658     {
3659       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3660                  "Record name longer than original lookup name... odd!\n");
3661       //FIXME to sth here
3662     }
3663
3664     answer_len = strlen(nah->name) - strlen(rh->name)
3665       + strlen(GNUNET_GNS_TLD) + 1;
3666     memset(result, 0, answer_len);
3667     strcpy(result, nah->name + strlen(rh->name) + 1);
3668
3669     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3670                "Got authority result %s\n", result);
3671
3672     nah->proc(nah->proc_cls, result);
3673     GNUNET_free(nah);
3674     free_resolver_handle(rh);
3675   }
3676   else
3677   {
3678     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3679                "Unable to resolve authority for remaining %s!\n", rh->name);
3680     nah->proc(nah->proc_cls, "");
3681     GNUNET_free(nah);
3682     free_resolver_handle(rh);
3683   }
3684
3685
3686 }
3687
3688
3689 /**
3690  * Tries to resolve the authority for name
3691  * in our namestore
3692  *
3693  * @param zone the root zone to look up for
3694  * @param pzone the private local zone
3695  * @param name the name to lookup up
3696  * @param proc the processor to call when finished
3697  * @param proc_cls the closure to pass to the processor
3698  */
3699 void
3700 gns_resolver_get_authority(struct GNUNET_CRYPTO_ShortHashCode zone,
3701                            struct GNUNET_CRYPTO_ShortHashCode pzone,
3702                            const char* name,
3703                            GetAuthorityResultProcessor proc,
3704                            void* proc_cls)
3705 {
3706   struct ResolverHandle *rh;
3707   struct GetNameAuthorityHandle *nah;
3708
3709   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3710               "Starting authority resolution for %s!\n", name);
3711
3712   nah = GNUNET_malloc(sizeof (struct GetNameAuthorityHandle));
3713   rh = GNUNET_malloc(sizeof (struct ResolverHandle));
3714   rh->authority = zone;
3715   rh->id = rid++;
3716   rh->private_local_zone = pzone;
3717
3718   if (strcmp(GNUNET_GNS_TLD, name) == 0)
3719   {
3720     strcpy(rh->name, "\0");
3721   }
3722   else
3723   {
3724     memset(rh->name, 0,
3725            strlen(name)-strlen(GNUNET_GNS_TLD));
3726     memcpy(rh->name, name,
3727            strlen(name)-strlen(GNUNET_GNS_TLD) - 1);
3728   }
3729
3730   memset(nah->name, 0,
3731          strlen(name)+1);
3732   strcpy(nah->name, name);
3733
3734   rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
3735   rh->authority_chain_tail = rh->authority_chain_head;
3736   rh->authority_chain_head->zone = zone;
3737   rh->proc = &handle_delegation_result_ns_get_auth;
3738   rh->proc_cls = (void*)nah;
3739
3740   nah->proc = proc;
3741   nah->proc_cls = proc_cls;
3742
3743   /* Start delegation resolution in our namestore */
3744   resolve_delegation_ns(rh);
3745
3746 }
3747
3748 /******** END GET AUTHORITY *************/
3749
3750 /* end of gnunet-service-gns_resolver.c */