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   char* pos;
1597   size_t len = (sizeof (uint32_t) * 2) + (sizeof (struct GNUNET_HashCode) * 2);
1598
1599   /* We cancel here as to not include the ns lookup in the timeout */
1600   if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1601   {
1602     GNUNET_SCHEDULER_cancel(rh->timeout_task);
1603     rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1604   }
1605   /* Start shortening */
1606   if ((rh->priv_key != NULL) && is_canonical (rh->name))
1607   {
1608     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1609              "GNS_PHASE_REC_VPN-%llu: Trying to shorten authority chain\n",
1610              rh->id);
1611              start_shorten (rh->authority_chain_tail,
1612              rh->priv_key);
1613   }
1614
1615   /* Extracting VPN information FIXME rd parsing with NS API?*/
1616   if (len != rd->data_size)
1617   {
1618     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1619                 "GNS_PHASE_REC_VPN-%llu: Error parsing VPN RR!\n",
1620                 rh->id);
1621     rh->proc(rh->proc_cls, rh, 0, NULL);
1622     return;
1623   }
1624
1625   pos = (char*)rd;
1626   memcpy (&af, pos, sizeof (uint32_t));
1627   pos += sizeof (uint32_t);
1628   memcpy (&proto, pos, sizeof (uint32_t));
1629   pos += sizeof (uint32_t);
1630   memcpy (&s_pid, pos, sizeof (struct GNUNET_HashCode));
1631   pos += sizeof (struct GNUNET_HashCode);
1632   memcpy (&s_sd, pos, sizeof (struct GNUNET_HashCode));
1633
1634
1635   if ((GNUNET_OK != GNUNET_CRYPTO_hash_from_string ((char*)&s_pid, &peer_id)) ||
1636       (GNUNET_OK != GNUNET_CRYPTO_hash_from_string ((char*)&s_sd, &serv_desc)))
1637   {
1638     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1639                 "GNS_PHASE_REC_VPN-%llu: Error parsing VPN RR hashes!\n",
1640                 rh->id);
1641     rh->proc(rh->proc_cls, rh, 0, NULL);
1642     return;
1643   }
1644
1645   rh->proc = &handle_record_vpn;
1646
1647   //FIXME timeout??
1648   rh->vpn_handle = GNUNET_VPN_redirect_to_peer (vpn_handle,
1649                                           af, proto,
1650                                           (struct GNUNET_PeerIdentity*)&peer_id,
1651                                           &serv_desc,
1652                                           GNUNET_NO, //nac
1653                                           GNUNET_TIME_UNIT_FOREVER_ABS, //FIXME
1654                                           &process_record_result_vpn,
1655                                           rh);
1656
1657 }
1658
1659 /**
1660  * The final phase of resolution.
1661  * rh->name is a name that is canonical and we do not have a delegation.
1662  * Query namestore for this record
1663  *
1664  * @param rh the pending lookup handle
1665  */
1666 static void
1667 resolve_record_ns(struct ResolverHandle *rh)
1668 {
1669   struct RecordLookupHandle *rlh = (struct RecordLookupHandle *)rh->proc_cls;
1670
1671   /* We cancel here as to not include the ns lookup in the timeout */
1672   if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
1673   {
1674     GNUNET_SCHEDULER_cancel(rh->timeout_task);
1675     rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1676   }
1677   /* Start shortening */
1678   if ((rh->priv_key != NULL) && is_canonical (rh->name))
1679   {
1680     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1681              "GNS_PHASE_REC-%llu: Trying to shorten authority chain\n",
1682              rh->id);
1683              start_shorten (rh->authority_chain_tail,
1684              rh->priv_key);
1685   }
1686
1687   /**
1688    * Try to resolve this record in our namestore.
1689    * The name to resolve is now in rh->authority_name
1690    * since we tried to resolve it to an authority
1691    * and failed.
1692    **/
1693   GNUNET_NAMESTORE_lookup_record(namestore_handle,
1694                                  &rh->authority,
1695                                  rh->name,
1696                                  rlh->record_type,
1697                                  &process_record_result_ns,
1698                                  rh);
1699 }
1700
1701
1702
1703 /**
1704  * Handle timeout for DHT requests
1705  *
1706  * @param cls the request handle as closure
1707  * @param tc the task context
1708  */
1709 static void
1710 dht_authority_lookup_timeout(void *cls,
1711                              const struct GNUNET_SCHEDULER_TaskContext *tc)
1712 {
1713   struct ResolverHandle *rh = cls;
1714   struct RecordLookupHandle *rlh = rh->proc_cls;
1715   char new_name[MAX_DNS_NAME_LENGTH];
1716
1717   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1718          "GNS_PHASE_DELEGATE_DHT-%llu: dht lookup for query %s (%ds)timed out.\n",
1719          rh->id, rh->authority_name, rh->timeout.rel_value);
1720
1721   rh->status |= RSL_TIMED_OUT;
1722
1723   rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1724
1725   GNUNET_DHT_get_stop (rh->get_handle);
1726   rh->get_handle = NULL;
1727
1728   if (strcmp(rh->name, "") == 0)
1729   {
1730     /*
1731      * promote authority back to name and try to resolve record
1732      */
1733     strcpy(rh->name, rh->authority_name);
1734     rh->proc(rh->proc_cls, rh, 0, NULL);
1735     return;
1736   }
1737
1738   /**
1739    * Start resolution in bg
1740    */
1741   GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH,
1742                   "%s.%s.%s", rh->name, rh->authority_name, GNUNET_GNS_TLD);
1743   //strcpy(new_name, rh->name);
1744   //strcpy(new_name+strlen(new_name), ".");
1745   //memcpy(new_name+strlen(new_name), GNUNET_GNS_TLD, strlen(GNUNET_GNS_TLD));
1746
1747   strcpy(rh->name, new_name);
1748
1749   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1750         "GNS_PHASE_DELEGATE_DHT-%llu: Starting background query for %s type %d\n",
1751         rh->id, rh->name, rlh->record_type);
1752
1753   gns_resolver_lookup_record(rh->authority,
1754                              rh->private_local_zone,
1755                              rlh->record_type,
1756                              new_name,
1757                              rh->priv_key,
1758                              GNUNET_TIME_UNIT_FOREVER_REL,
1759                              GNUNET_NO,
1760                              &background_lookup_result_processor,
1761                              NULL);
1762
1763   rh->proc(rh->proc_cls, rh, 0, NULL);
1764 }
1765
1766 /* Prototype */
1767 static void resolve_delegation_dht(struct ResolverHandle *rh);
1768
1769 /* Prototype */
1770 static void resolve_delegation_ns(struct ResolverHandle *rh);
1771
1772
1773 /**
1774  * Namestore resolution for delegation finished. Processing result.
1775  *
1776  * @param cls the closure
1777  * @param rh resolver handle
1778  * @param rd_count number of results (always 0)
1779  * @param rd record data (always NULL)
1780  */
1781 static void
1782 handle_delegation_ns(void* cls, struct ResolverHandle *rh,
1783                           unsigned int rd_count,
1784                           const struct GNUNET_NAMESTORE_RecordData *rd);
1785
1786
1787 /**
1788  * Function called when we get a result from the dht
1789  * for our query. Recursively tries to resolve authorities
1790  * for name in DHT.
1791  *
1792  * @param cls the request handle
1793  * @param exp lifetime
1794  * @param key the key the record was stored under
1795  * @param get_path get path
1796  * @param get_path_length get path length
1797  * @param put_path put path
1798  * @param put_path_length put path length
1799  * @param type the block type
1800  * @param size the size of the record
1801  * @param data the record data
1802  */
1803 static void
1804 process_delegation_result_dht(void* cls,
1805                  struct GNUNET_TIME_Absolute exp,
1806                  const struct GNUNET_HashCode * key,
1807                  const struct GNUNET_PeerIdentity *get_path,
1808                  unsigned int get_path_length,
1809                  const struct GNUNET_PeerIdentity *put_path,
1810                  unsigned int put_path_length,
1811                  enum GNUNET_BLOCK_Type type,
1812                  size_t size, const void *data)
1813 {
1814   struct ResolverHandle *rh;
1815   struct GNSNameRecordBlock *nrb;
1816   uint32_t num_records;
1817   char* name = NULL;
1818   char* rd_data = (char*) data;
1819   int i;
1820   int rd_size;
1821   struct GNUNET_CRYPTO_ShortHashCode zone, name_hash;
1822   struct GNUNET_HashCode zone_hash_double, name_hash_double;
1823
1824   rh = (struct ResolverHandle *)cls;
1825
1826   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1827              "GNS_PHASE_DELEGATE_DHT-%llu: Got DHT result\n", rh->id);
1828
1829   if (data == NULL)
1830     return;
1831
1832   nrb = (struct GNSNameRecordBlock*)data;
1833
1834   /* stop dht lookup and timeout task */
1835   GNUNET_DHT_get_stop (rh->get_handle);
1836
1837   rh->get_handle = NULL;
1838
1839   if (rh->dht_heap_node != NULL)
1840   {
1841     GNUNET_CONTAINER_heap_remove_node(rh->dht_heap_node);
1842     rh->dht_heap_node = NULL;
1843   }
1844
1845   num_records = ntohl(nrb->rd_count);
1846   name = (char*)&nrb[1];
1847   {
1848     struct GNUNET_NAMESTORE_RecordData rd[num_records];
1849
1850     rd_data += strlen(name) + 1 + sizeof(struct GNSNameRecordBlock);
1851     rd_size = size - strlen(name) - 1 - sizeof(struct GNSNameRecordBlock);
1852
1853     if (GNUNET_SYSERR == GNUNET_NAMESTORE_records_deserialize (rd_size,
1854                                                                rd_data,
1855                                                                num_records,
1856                                                                rd))
1857     {
1858       GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1859                  "GNS_PHASE_DELEGATE_DHT-%llu: Error deserializing data!\n",
1860                  rh->id);
1861       return;
1862     }
1863
1864     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1865                "GNS_PHASE_DELEGATE_DHT-%llu: Got name: %s (wanted %s)\n",
1866                rh->id, name, rh->authority_name);
1867     for (i=0; i<num_records; i++)
1868     {
1869
1870       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1871                 "GNS_PHASE_DELEGATE_DHT-%llu: Got name: %s (wanted %s)\n",
1872                 rh->id, name, rh->authority_name);
1873       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1874                  "GNS_PHASE_DELEGATE_DHT-%llu: Got type: %d (wanted %d)\n",
1875                  rh->id, rd[i].record_type, GNUNET_GNS_RECORD_PKEY);
1876       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1877                  "GNS_PHASE_DELEGATE_DHT-%llu: Got data length: %d\n",
1878                  rh->id, rd[i].data_size);
1879       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1880                  "GNS_PHASE_DELEGATE_DHT-%llu: Got flag %d\n",
1881                  rh->id, rd[i].flags);
1882
1883       if ((strcmp(name, rh->authority_name) == 0) &&
1884           (rd[i].record_type == GNUNET_GNS_RECORD_PKEY))
1885       {
1886         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1887                    "GNS_PHASE_DELEGATE_DHT-%llu: Authority found in DHT\n",
1888                    rh->id);
1889         rh->answered = 1;
1890         memcpy(&rh->authority, rd[i].data, sizeof(struct GNUNET_CRYPTO_ShortHashCode));
1891         struct AuthorityChain *auth =
1892           GNUNET_malloc(sizeof(struct AuthorityChain));
1893         auth->zone = rh->authority;
1894         memset(auth->name, 0, strlen(rh->authority_name)+1);
1895         strcpy(auth->name, rh->authority_name);
1896         GNUNET_CONTAINER_DLL_insert (rh->authority_chain_head,
1897                                      rh->authority_chain_tail,
1898                                      auth);
1899
1900         /** try to import pkey if private key available */
1901         //if (rh->priv_key && is_canonical (rh->name))
1902         //  process_discovered_authority(name, auth->zone,
1903         //                               rh->authority_chain_tail->zone,
1904         //                               rh->priv_key);
1905       }
1906
1907     }
1908
1909
1910     GNUNET_CRYPTO_short_hash(name, strlen(name), &name_hash);
1911     GNUNET_CRYPTO_short_hash_double(&name_hash, &name_hash_double);
1912     GNUNET_CRYPTO_hash_xor(key, &name_hash_double, &zone_hash_double);
1913     GNUNET_CRYPTO_short_hash_from_truncation (&zone_hash_double, &zone);
1914
1915     /* Save to namestore */
1916     if (0 != GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_tail->zone,
1917                                           &zone))
1918     {
1919       GNUNET_NAMESTORE_record_put (namestore_handle,
1920                                  &nrb->public_key,
1921                                  name,
1922                                  exp,
1923                                  num_records,
1924                                  rd,
1925                                  &nrb->signature,
1926                                  &on_namestore_record_put_result, //cont
1927                                  NULL); //cls
1928     }
1929   }
1930
1931   if (rh->answered)
1932   {
1933     rh->answered = 0;
1934     /**
1935      * delegate
1936      * FIXME in this case. should we ask namestore again?
1937      */
1938     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1939       "GNS_PHASE_DELEGATE_DHT-%llu: Answer from DHT for %s. Yet to resolve: %s\n",
1940       rh->id, rh->authority_name, rh->name);
1941
1942     if (strcmp(rh->name, "") == 0)
1943     {
1944       /* Start shortening */
1945       if ((rh->priv_key != NULL) && is_canonical (rh->name))
1946       {
1947         GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1948              "GNS_PHASE_DELEGATE_DHT-%llu: Trying to shorten authority chain\n",
1949              rh->id);
1950         start_shorten (rh->authority_chain_tail,
1951                        rh->priv_key);
1952       }
1953
1954       rh->proc(rh->proc_cls, rh, 0, NULL);
1955     }
1956     else
1957     {
1958       rh->proc = &handle_delegation_ns;
1959       resolve_delegation_ns(rh);
1960     }
1961     return;
1962   }
1963
1964   /**
1965    * No pkey but name exists
1966    * promote back
1967    */
1968   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1969              "GNS_PHASE_DELEGATE_DHT-%llu: Adding %s back to %s\n",
1970              rh->id, rh->authority_name, rh->name);
1971   if (strcmp(rh->name, "") == 0)
1972     strcpy(rh->name, rh->authority_name);
1973   else
1974     GNUNET_snprintf(rh->name, MAX_DNS_NAME_LENGTH, "%s.%s",
1975                   rh->name, rh->authority_name); //FIXME ret
1976
1977   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1978              "GNS_PHASE_DELEGATE_DHT-%llu: %s restored\n", rh->id, rh->name);
1979   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1980            "GNS_PHASE_DELEGATE_DHT-%llu: DHT authority lookup found no match!\n",
1981            rh->id);
1982   rh->proc(rh->proc_cls, rh, 0, NULL);
1983 }
1984
1985 #define MAX_SOA_LENGTH sizeof(uint32_t)+sizeof(uint32_t)+sizeof(uint32_t)+sizeof(uint32_t)\
1986                         +(MAX_DNS_NAME_LENGTH*2)
1987 #define MAX_MX_LENGTH sizeof(uint16_t)+MAX_DNS_NAME_LENGTH
1988
1989
1990 static void
1991 expand_plus(char** dest, char* src, char* repl)
1992 {
1993   char* pos;
1994   unsigned int s_len = strlen(src)+1;
1995
1996   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1997              "GNS_POSTPROCESS: Got %s to expand with %s\n", src, repl);
1998
1999   if (s_len < 3)
2000   {
2001     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2002                "GNS_POSTPROCESS: %s to short\n", src);
2003
2004     /* no postprocessing */
2005     memcpy(*dest, src, s_len+1);
2006     return;
2007   }
2008
2009   if (0 == strcmp(src+s_len-3, ".+"))
2010   {
2011     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2012                "GNS_POSTPROCESS: Expanding .+ in %s\n", src);
2013     memset(*dest, 0, s_len+strlen(repl)+strlen(GNUNET_GNS_TLD));
2014     strcpy(*dest, src);
2015     pos = *dest+s_len-2;
2016     strcpy(pos, repl);
2017     pos += strlen(repl);
2018     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2019                "GNS_POSTPROCESS: Expanded to %s\n", *dest);
2020   }
2021   else
2022   {
2023     memcpy(*dest, src, s_len+1);
2024   }
2025 }
2026
2027 /**
2028  * finish lookup
2029  */
2030 static void
2031 finish_lookup(struct ResolverHandle *rh,
2032               struct RecordLookupHandle* rlh,
2033               unsigned int rd_count,
2034               const struct GNUNET_NAMESTORE_RecordData *rd)
2035 {
2036   int i;
2037   char new_rr_data[MAX_DNS_NAME_LENGTH];
2038   char new_mx_data[MAX_MX_LENGTH];
2039   char new_soa_data[MAX_SOA_LENGTH];
2040   struct GNUNET_NAMESTORE_RecordData p_rd[rd_count];
2041   char* repl_string;
2042   char* pos;
2043   unsigned int offset;
2044
2045   if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
2046   {
2047     GNUNET_SCHEDULER_cancel(rh->timeout_task);
2048     rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2049   }
2050
2051   if (rd_count > 0)
2052     memcpy(p_rd, rd, rd_count*sizeof(struct GNUNET_NAMESTORE_RecordData));
2053
2054   for (i = 0; i < rd_count; i++)
2055   {
2056
2057     if (rd[i].record_type != GNUNET_GNS_RECORD_TYPE_NS &&
2058         rd[i].record_type != GNUNET_GNS_RECORD_TYPE_CNAME &&
2059         rd[i].record_type != GNUNET_GNS_RECORD_MX &&
2060         rd[i].record_type != GNUNET_GNS_RECORD_TYPE_SOA)
2061     {
2062       p_rd[i].data = rd[i].data;
2063       continue;
2064     }
2065
2066     /**
2067      * for all those records we 'should'
2068      * also try to resolve the A/AAAA records (RFC1035)
2069      * This is a feature and not important
2070      */
2071
2072     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2073                "GNS_POSTPROCESS: Postprocessing\n");
2074
2075     if (strcmp(rh->name, "+") == 0)
2076       repl_string = rlh->name;
2077     else
2078       repl_string = rlh->name+strlen(rh->name)+1;
2079
2080     offset = 0;
2081     if (rd[i].record_type == GNUNET_GNS_RECORD_MX)
2082     {
2083       memcpy(new_mx_data, (char*)rd[i].data, sizeof(uint16_t));
2084       offset = sizeof(uint16_t);
2085       pos = new_mx_data+offset;
2086       expand_plus(&pos, (char*)rd[i].data+sizeof(uint16_t),
2087                   repl_string);
2088       offset += strlen(new_mx_data+sizeof(uint16_t))+1;
2089       p_rd[i].data = new_mx_data;
2090       p_rd[i].data_size = offset;
2091     }
2092     else if (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_SOA)
2093     {
2094       /* expand mname and rname */
2095       pos = new_soa_data;
2096       expand_plus(&pos, (char*)rd[i].data, repl_string);
2097       offset = strlen(new_soa_data)+1;
2098       pos = new_soa_data+offset;
2099       expand_plus(&pos, (char*)rd[i].data+offset, repl_string);
2100       offset += strlen(new_soa_data+offset)+1;
2101       /* cpy the 4 numbers serial refresh retry and expire */
2102       memcpy(new_soa_data+offset, (char*)rd[i].data+offset, sizeof(uint32_t)*5);
2103       offset += sizeof(uint32_t)*5;
2104       p_rd[i].data_size = offset;
2105       p_rd[i].data = new_soa_data;
2106     }
2107     else
2108     {
2109       pos = new_rr_data;
2110       expand_plus(&pos, (char*)rd[i].data, repl_string);
2111       p_rd[i].data_size = strlen(new_rr_data)+1;
2112       p_rd[i].data = new_rr_data;
2113     }
2114
2115   }
2116
2117   rlh->proc(rlh->proc_cls, rd_count, p_rd);
2118   GNUNET_free(rlh);
2119
2120 }
2121
2122 /**
2123  * Process DHT lookup result for record.
2124  *
2125  * @param cls the closure
2126  * @param rh resolver handle
2127  * @param rd_count number of results
2128  * @param rd record data
2129  */
2130 static void
2131 handle_record_dht(void* cls, struct ResolverHandle *rh,
2132                        unsigned int rd_count,
2133                        const struct GNUNET_NAMESTORE_RecordData *rd)
2134 {
2135   struct RecordLookupHandle* rlh;
2136
2137   rlh = (struct RecordLookupHandle*)cls;
2138   if (rd_count == 0)
2139   {
2140     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2141                "GNS_PHASE_REC-%d: No records for %s found in DHT. Aborting\n",
2142                rh->id, rh->name);
2143     /* give up, cannot resolve */
2144     finish_lookup(rh, rlh, 0, NULL);
2145     free_resolver_handle(rh);
2146     return;
2147   }
2148
2149   /* results found yay */
2150   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2151              "GNS_PHASE_REC-%d: Record resolved from DHT!", rh->id);
2152
2153   finish_lookup(rh, rlh, rd_count, rd);
2154   free_resolver_handle(rh);
2155
2156 }
2157
2158
2159
2160
2161 /**
2162  * Process namestore lookup result for record.
2163  *
2164  * @param cls the closure
2165  * @param rh resolver handle
2166  * @param rd_count number of results
2167  * @param rd record data
2168  */
2169 static void
2170 handle_record_ns (void* cls, struct ResolverHandle *rh,
2171                   unsigned int rd_count,
2172                   const struct GNUNET_NAMESTORE_RecordData *rd)
2173 {
2174   struct RecordLookupHandle* rlh;
2175   rlh = (struct RecordLookupHandle*) cls;
2176   if (rd_count == 0)
2177   {
2178     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2179                "GNS_PHASE_REC-%d: NS returned no records. (status: %d)!\n",
2180                rh->id,
2181                rh->status);
2182
2183     /**
2184      * There are 5 conditions that have to met for us to consult the DHT:
2185      * 1. The entry in the DHT is RSL_RECORD_EXPIRED AND
2186      * 2. No entry in the NS existed AND
2187      * 3. The zone queried is not the local resolver's zone AND
2188      * 4. The name that was looked up is '+'
2189      *    because if it was any other canonical name we either already queried
2190      *    the DHT for the authority in the authority lookup phase (and thus
2191      *    would already have an entry in the NS for the record)
2192      * 5. We are not in cache only mode
2193      */
2194     if (rh->status & (RSL_RECORD_EXPIRED | !RSL_RECORD_EXISTS) &&
2195         GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
2196                                      &rh->private_local_zone) &&
2197         (strcmp(rh->name, "+") == 0) &&
2198         (rh->only_cached == GNUNET_NO))
2199     {
2200       rh->proc = &handle_record_dht;
2201       resolve_record_dht(rh);
2202       return;
2203     }
2204     /* give up, cannot resolve */
2205     finish_lookup(rh, rlh, 0, NULL);
2206     free_resolver_handle(rh);
2207     return;
2208   }
2209
2210   /* results found yay */
2211   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2212              "GNS_PHASE_REC-%d: Record resolved from namestore!", rh->id);
2213
2214   finish_lookup(rh, rlh, rd_count, rd);
2215
2216   free_resolver_handle(rh);
2217
2218 }
2219
2220
2221 /**
2222  * Move one level up in the domain hierarchy and return the
2223  * passed top level domain.
2224  *
2225  * @param name the domain
2226  * @param dest the destination where the tld will be put
2227  */
2228 void
2229 pop_tld(char* name, char* dest)
2230 {
2231   uint32_t len;
2232
2233   if (is_canonical(name))
2234   {
2235     strcpy(dest, name);
2236     strcpy(name, "");
2237     return;
2238   }
2239
2240   for (len = strlen(name); len > 0; len--)
2241   {
2242     if (*(name+len) == '.')
2243       break;
2244   }
2245
2246   //Was canonical?
2247   if (len == 0)
2248     return;
2249
2250   name[len] = '\0';
2251
2252   strcpy(dest, (name+len+1));
2253 }
2254
2255 /**
2256  * Checks if name is in tld
2257  *
2258  * @param name the name to check
2259  * @param tld the TLD to check for
2260  * @return GNUNET_YES or GNUNET_NO
2261  */
2262 int
2263 is_tld(const char* name, const char* tld)
2264 {
2265   int offset = 0;
2266
2267   if (strlen(name) <= strlen(tld))
2268   {
2269     return GNUNET_NO;
2270   }
2271
2272   offset = strlen(name)-strlen(tld);
2273   if (strcmp(name+offset, tld) != 0)
2274   {
2275     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2276                "%s is not in .%s TLD\n", name, tld);
2277     return GNUNET_NO;
2278   }
2279   return GNUNET_YES;
2280 }
2281
2282 /**
2283  * DHT resolution for delegation finished. Processing result.
2284  *
2285  * @param cls the closure
2286  * @param rh resolver handle
2287  * @param rd_count number of results (always 0)
2288  * @param rd record data (always NULL)
2289  */
2290 static void
2291 handle_delegation_dht(void* cls, struct ResolverHandle *rh,
2292                           unsigned int rd_count,
2293                           const struct GNUNET_NAMESTORE_RecordData *rd)
2294 {
2295   struct RecordLookupHandle* rlh;
2296   rlh = (struct RecordLookupHandle*) cls;
2297
2298
2299   if (strcmp(rh->name, "") == 0)
2300   {
2301     if ((rlh->record_type == GNUNET_GNS_RECORD_PKEY))
2302     {
2303       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2304                  "GNS_PHASE_DELEGATE_DHT-%llu: Resolved queried PKEY via DHT.\n",
2305                  rh->id);
2306       finish_lookup(rh, rlh, rd_count, rd);
2307       free_resolver_handle(rh);
2308       return;
2309     }
2310     /* We resolved full name for delegation. resolving record */
2311     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2312      "GNS_PHASE_DELEGATE_DHT-%llu: Resolved full name for delegation via DHT.\n",
2313      rh->id);
2314     strcpy(rh->name, "+\0");
2315     rh->proc = &handle_record_ns;
2316     resolve_record_ns(rh);
2317     return;
2318   }
2319
2320   /**
2321    * we still have some left
2322    **/
2323   if (is_canonical(rh->name))
2324   {
2325     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2326              "GNS_PHASE_DELEGATE_DHT-%llu: Resolving canonical record %s in ns\n",
2327              rh->id,
2328              rh->name);
2329     rh->proc = &handle_record_ns;
2330     resolve_record_ns(rh);
2331     return;
2332   }
2333   /* give up, cannot resolve */
2334   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2335  "GNS_PHASE_DELEGATE_DHT-%llu: Cannot fully resolve delegation for %s via DHT!\n",
2336  rh->id, rh->name);
2337   finish_lookup(rh, rlh, 0, NULL);
2338   free_resolver_handle(rh);
2339 }
2340
2341
2342 /**
2343  * Start DHT lookup for a name -> PKEY (compare NS) record in
2344  * rh->authority's zone
2345  *
2346  * @param rh the pending gns query
2347  */
2348 static void
2349 resolve_delegation_dht(struct ResolverHandle *rh)
2350 {
2351   uint32_t xquery;
2352   struct GNUNET_CRYPTO_ShortHashCode name_hash;
2353   struct GNUNET_HashCode name_hash_double;
2354   struct GNUNET_HashCode zone_hash_double;
2355   struct GNUNET_HashCode lookup_key;
2356   struct ResolverHandle *rh_heap_root;
2357
2358   pop_tld(rh->name, rh->authority_name);
2359   GNUNET_CRYPTO_short_hash(rh->authority_name,
2360                      strlen(rh->authority_name),
2361                      &name_hash);
2362   GNUNET_CRYPTO_short_hash_double(&name_hash, &name_hash_double);
2363   GNUNET_CRYPTO_short_hash_double(&rh->authority, &zone_hash_double);
2364   GNUNET_CRYPTO_hash_xor(&name_hash_double, &zone_hash_double, &lookup_key);
2365
2366   rh->dht_heap_node = NULL;
2367
2368   if (rh->timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
2369   {
2370     //rh->timeout_task = GNUNET_SCHEDULER_add_delayed (DHT_LOOKUP_TIMEOUT,
2371     //                                          &dht_authority_lookup_timeout,
2372     //                                                   rh);
2373     rh->timeout_cont = &dht_authority_lookup_timeout;
2374     rh->timeout_cont_cls = rh;
2375   }
2376   else
2377   {
2378     if (max_allowed_background_queries <=
2379         GNUNET_CONTAINER_heap_get_size (dht_lookup_heap))
2380     {
2381       /* terminate oldest lookup */
2382       rh_heap_root = GNUNET_CONTAINER_heap_remove_root (dht_lookup_heap);
2383       GNUNET_DHT_get_stop(rh_heap_root->get_handle);
2384       rh_heap_root->dht_heap_node = NULL;
2385
2386       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2387         "GNS_PHASE_DELEGATE_DHT-%llu: Replacing oldest background query for %s\n",
2388         rh->id, rh_heap_root->authority_name);
2389
2390       rh_heap_root->proc(rh_heap_root->proc_cls,
2391                          rh_heap_root,
2392                          0,
2393                          NULL);
2394     }
2395     rh->dht_heap_node = GNUNET_CONTAINER_heap_insert (dht_lookup_heap,
2396                                          rh,
2397                                          GNUNET_TIME_absolute_get().abs_value);
2398   }
2399
2400   xquery = htonl(GNUNET_GNS_RECORD_PKEY);
2401
2402   GNUNET_assert(rh->get_handle == NULL);
2403   rh->get_handle = GNUNET_DHT_get_start(dht_handle,
2404                        GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
2405                        &lookup_key,
2406                        DHT_GNS_REPLICATION_LEVEL,
2407                        GNUNET_DHT_RO_NONE,
2408                        &xquery,
2409                        sizeof(xquery),
2410                        &process_delegation_result_dht,
2411                        rh);
2412
2413 }
2414
2415
2416 /**
2417  * Namestore resolution for delegation finished. Processing result.
2418  *
2419  * @param cls the closure
2420  * @param rh resolver handle
2421  * @param rd_count number of results (always 0)
2422  * @param rd record data (always NULL)
2423  */
2424 static void
2425 handle_delegation_ns(void* cls, struct ResolverHandle *rh,
2426                           unsigned int rd_count,
2427                           const struct GNUNET_NAMESTORE_RecordData *rd)
2428 {
2429   struct RecordLookupHandle* rlh;
2430   rlh = (struct RecordLookupHandle*) cls;
2431
2432   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2433              "GNS_PHASE_DELEGATE_NS-%llu: Resolution status: %d.\n",
2434              rh->id, rh->status);
2435
2436   if (strcmp(rh->name, "") == 0)
2437   {
2438     if (rlh->record_type == GNUNET_GNS_RECORD_PKEY)
2439     {
2440       GNUNET_assert(rd_count == 1);
2441       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2442                  "GNS_PHASE_DELEGATE_NS-%llu: Resolved queried PKEY in NS.\n",
2443                  rh->id);
2444       finish_lookup(rh, rlh, rd_count, rd);
2445       free_resolver_handle(rh);
2446       return;
2447     }
2448     /* We resolved full name for delegation. resolving record */
2449     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2450               "GNS_PHASE_DELEGATE_NS-%llu: Resolved full name for delegation.\n",
2451               rh->id);
2452
2453     if (rh->status & RSL_DELEGATE_VPN)
2454     {
2455       if (rlh->record_type == GNUNET_GNS_RECORD_VPN)
2456       {
2457         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2458                  "GNS_PHASE_DELEGATE_NS-%llu: Resolved queried VPNRR in NS.\n",
2459                  rh->id);
2460         finish_lookup(rh, rlh, rd_count, rd);
2461         free_resolver_handle(rh);
2462         return;
2463       }
2464       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2465              "GNS_PHASE_DELEGATE_NS-%llu: VPN delegation starting.\n",
2466              rh->id);
2467       GNUNET_assert (NULL != rd);
2468       rh->proc = &handle_record_vpn;
2469       resolve_record_vpn (rh, rd_count, rd);
2470     }
2471     else if (rh->status & RSL_DELEGATE_NS)
2472     {
2473       if (rlh->record_type == GNUNET_GNS_RECORD_TYPE_NS)
2474       {
2475         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2476                    "GNS_PHASE_DELEGATE_NS-%llu: Resolved queried NSRR in NS.\n",
2477                    rh->id);
2478         finish_lookup(rh, rlh, rd_count, rd);
2479         free_resolver_handle(rh);
2480         return;
2481       }
2482       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2483                  "GNS_PHASE_DELEGATE_NS-%llu: VPN delegation starting.\n",
2484                  rh->id);
2485       GNUNET_assert (NULL != rd);
2486       rh->proc = &handle_record_ns;
2487       resolve_record_dns (rh, rd_count, rd);
2488     }
2489     else
2490     {
2491       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2492                  "GNS_PHASE_DELEGATE_NS-%llu: Resolving record +\n",
2493                  rh->id);
2494       strcpy(rh->name, "+\0");
2495       rh->proc = &handle_record_ns;
2496       resolve_record_ns(rh);
2497     }
2498     return;
2499   }
2500
2501   /**
2502    * we still have some left
2503    * check if authority in ns is fresh
2504    * and exists
2505    * or we are authority
2506    **/
2507   if (((rh->status & RSL_RECORD_EXISTS) && (!(rh->status & RSL_RECORD_EXPIRED)))
2508       || !GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
2509                                        &rh->private_local_zone))
2510   {
2511     if (is_canonical(rh->name))
2512     {
2513       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2514                  "GNS_PHASE_DELEGATE_NS-%llu: Resolving canonical record %s\n",
2515                  rh->id,
2516                  rh->name);
2517       rh->proc = &handle_record_ns;
2518       resolve_record_ns(rh);
2519     }
2520     else
2521     {
2522       /* give up, cannot resolve */
2523       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2524           "GNS_PHASE_DELEGATE_NS-%llu: Cannot fully resolve delegation for %s!\n",
2525           rh->id,
2526           rh->name);
2527       finish_lookup(rh, rlh, rd_count, rd);
2528       //rlh->proc(rlh->proc_cls, 0, NULL);
2529     }
2530     return;
2531   }
2532
2533   if (rh->only_cached == GNUNET_YES)
2534   {
2535     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2536                "GNS_PHASE_DELEGATE_NS-%llu: Only cache resolution, no result\n",
2537                rh->id, rh->name);
2538     finish_lookup(rh, rlh, rd_count, rd);
2539     return;
2540   }
2541
2542   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2543       "GNS_PHASE_DELEGATE_NS-%llu: Trying to resolve delegation for %s via DHT\n",
2544       rh->id, rh->name);
2545   rh->proc = &handle_delegation_dht;
2546   resolve_delegation_dht(rh);
2547 }
2548
2549
2550
2551 /**
2552  * This is a callback function that should give us only PKEY
2553  * records. Used to query the namestore for the authority (PKEY)
2554  * for 'name'. It will recursively try to resolve the
2555  * authority for a given name from the namestore.
2556  *
2557  * @param cls the pending query
2558  * @param key the key of the zone we did the lookup
2559  * @param expiration expiration date of the record data set in the namestore
2560  * @param name the name for which we need an authority
2561  * @param rd_count the number of records with 'name'
2562  * @param rd the record data
2563  * @param signature the signature of the authority for the record data
2564  */
2565 static void
2566 process_delegation_result_ns(void* cls,
2567                    const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
2568                    struct GNUNET_TIME_Absolute expiration,
2569                    const char *name,
2570                    unsigned int rd_count,
2571                    const struct GNUNET_NAMESTORE_RecordData *rd,
2572                    const struct GNUNET_CRYPTO_RsaSignature *signature)
2573 {
2574   struct ResolverHandle *rh;
2575   struct GNUNET_TIME_Relative remaining_time;
2576   struct GNUNET_CRYPTO_ShortHashCode zone;
2577   char new_name[MAX_DNS_NAME_LENGTH];
2578
2579   rh = (struct ResolverHandle *)cls;
2580   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2581              "GNS_PHASE_DELEGATE_NS-%llu: Got %d records from authority lookup\n",
2582              rh->id, rd_count);
2583
2584   GNUNET_CRYPTO_short_hash(key,
2585                      sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
2586                      &zone);
2587   remaining_time = GNUNET_TIME_absolute_get_remaining (expiration);
2588
2589   rh->status = 0;
2590
2591   if (name != NULL)
2592   {
2593     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2594                "GNS_PHASE_DELEGATE_NS-%llu: Records with name %s exist.\n",
2595                rh->id, name);
2596     rh->status |= RSL_RECORD_EXISTS;
2597   }
2598
2599   if (remaining_time.rel_value == 0)
2600   {
2601     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2602                "GNS_PHASE_DELEGATE_NS-%llu: Record set %s expired.\n",
2603                rh->id, name);
2604     rh->status |= RSL_RECORD_EXPIRED;
2605   }
2606
2607   /**
2608    * No authority found in namestore.
2609    */
2610   if (rd_count == 0)
2611   {
2612     /**
2613      * We did not find an authority in the namestore
2614      */
2615
2616     /**
2617      * No PKEY in zone.
2618      * Promote this authority back to a name maybe it is
2619      * our record.
2620      */
2621     if (strcmp(rh->name, "") == 0)
2622     {
2623       /* simply promote back */
2624       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2625                  "GNS_PHASE_DELEGATE_NS-%llu: Promoting %s back to name\n",
2626                  rh->id, rh->authority_name);
2627       strcpy(rh->name, rh->authority_name);
2628     }
2629     else
2630     {
2631       /* add back to existing name */
2632       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2633                  "GNS_PHASE_DELEGATE_NS-%llu: Adding %s back to %s\n",
2634                  rh->id, rh->authority_name, rh->name);
2635       //memset(new_name, 0, strlen(rh->name) + strlen(rh->authority_name) + 2);
2636       GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
2637                       rh->name, rh->authority_name);
2638       //strcpy(new_name, rh->name);
2639       //strcpy(new_name+strlen(new_name), ".");
2640       //strcpy(new_name+strlen(new_name), rh->authority_name);
2641       strcpy(rh->name, new_name);
2642       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2643                  "GNS_PHASE_DELEGATE_NS-%llu: %s restored\n", rh->id, rh->name);
2644     }
2645     rh->proc(rh->proc_cls, rh, 0, NULL);
2646     return;
2647   }
2648
2649   /**
2650    * We found an authority that may be able to help us
2651    * move on with query
2652    * Note only 1 pkey should have been returned.. anything else would be strange
2653    */
2654   int i;
2655   for (i=0; i<rd_count;i++)
2656   {
2657     /**
2658      * Redirect via VPN
2659      */
2660     if (rd[i].record_type == GNUNET_GNS_RECORD_VPN)
2661     {
2662       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2663                  "GNS_PHASE_DELEGATE_NS-%llu: VPNRR found.\n",
2664                  rh->id);
2665       rh->status |= RSL_DELEGATE_VPN;
2666       rh->proc (rh->proc_cls, rh, rd_count, rd);
2667       return;
2668     }
2669
2670     /**
2671      * Redirect via NS
2672      * FIXME make optional
2673      */
2674     if (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_NS)
2675     {
2676       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2677                  "GNS_PHASE_DELEGATE_NS-%llu: NS found.\n",
2678                  rh->id);
2679       rh->status |= RSL_DELEGATE_NS;
2680       rh->proc (rh->proc_cls, rh, rd_count, rd);
2681     }
2682
2683     if (rd[i].record_type != GNUNET_GNS_RECORD_PKEY)
2684       continue;
2685
2686     if (ignore_pending_records &&
2687         (rd[i].flags & GNUNET_NAMESTORE_RF_PENDING))
2688     {
2689       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2690       "GNS_PHASE_DELEGATE_NS-%llu: PKEY for %s is pending user confirmation.\n",
2691         rh->id,
2692         name);
2693       continue;
2694     }
2695
2696     if ((GNUNET_TIME_absolute_get_remaining (rd[i].expiration)).rel_value
2697          == 0)
2698     {
2699       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2700                  "GNS_PHASE_DELEGATE_NS-%llu: This pkey is expired.\n",
2701                  rh->id);
2702       if (remaining_time.rel_value == 0)
2703       {
2704         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2705                    "GNS_PHASE_DELEGATE_NS-%llu: This dht entry is expired.\n",
2706                    rh->id);
2707         rh->authority_chain_head->fresh = 0;
2708         rh->proc(rh->proc_cls, rh, 0, NULL);
2709         return;
2710       }
2711
2712       continue;
2713     }
2714
2715     /**
2716      * Resolve rest of query with new authority
2717      */
2718     GNUNET_assert(rd[i].record_type == GNUNET_GNS_RECORD_PKEY);
2719     memcpy(&rh->authority, rd[i].data,
2720            sizeof(struct GNUNET_CRYPTO_ShortHashCode));
2721     struct AuthorityChain *auth = GNUNET_malloc(sizeof(struct AuthorityChain));
2722     auth->zone = rh->authority;
2723     memset(auth->name, 0, strlen(rh->authority_name)+1);
2724     strcpy(auth->name, rh->authority_name);
2725     GNUNET_CONTAINER_DLL_insert (rh->authority_chain_head,
2726                                  rh->authority_chain_tail,
2727                                  auth);
2728
2729     /** try to import pkey if private key available
2730      * TODO: Only import last one?
2731      */
2732     //if (rh->priv_key && (name != NULL) && is_canonical (rh->name))
2733     //  process_discovered_authority((char*)name, auth->zone,
2734     //                               rh->authority_chain_tail->zone,
2735     //                               rh->priv_key);
2736     /**
2737      * We are done with PKEY resolution if name is empty
2738      * else resolve again with new authority
2739      */
2740     if (strcmp(rh->name, "") == 0)
2741       rh->proc(rh->proc_cls, rh, rd_count, rd);
2742     else
2743       resolve_delegation_ns(rh);
2744     return;
2745   }
2746
2747   /**
2748    * no answers found
2749    */
2750   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2751     "GNS_PHASE_DELEGATE_NS-%llu: Authority lookup and no PKEY...\n", rh->id);
2752   /**
2753    * If we have found some records for the LAST label
2754    * we return the results. Else null.
2755    */
2756   if (strcmp(rh->name, "") == 0)
2757   {
2758     /* Start shortening */
2759     if ((rh->priv_key != NULL) && is_canonical (rh->name))
2760     {
2761       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2762               "GNS_PHASE_DELEGATE_NS-%llu: Trying to shorten authority chain\n",
2763               rh->id);
2764       start_shorten (rh->authority_chain_tail,
2765                     rh->priv_key);
2766     }
2767     /* simply promote back */
2768     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2769                "GNS_PHASE_DELEGATE_NS-%llu: Promoting %s back to name\n",
2770                rh->id, rh->authority_name);
2771     strcpy(rh->name, rh->authority_name);
2772     rh->proc(rh->proc_cls, rh, rd_count, rd);
2773   }
2774   else
2775   {
2776     rh->proc(rh->proc_cls, rh, 0, NULL);
2777   }
2778 }
2779
2780
2781 /**
2782  * Resolve the delegation chain for the request in our namestore
2783  *
2784  * @param rh the resolver handle
2785  */
2786 static void
2787 resolve_delegation_ns(struct ResolverHandle *rh)
2788 {
2789   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2790              "GNS_PHASE_DELEGATE_NS-%llu: Resolving delegation for %s\n",
2791              rh->id, rh->name);
2792   pop_tld(rh->name, rh->authority_name);
2793   GNUNET_NAMESTORE_lookup_record(namestore_handle,
2794                                  &rh->authority,
2795                                  rh->authority_name,
2796                                  GNUNET_GNS_RECORD_ANY,
2797                                  &process_delegation_result_ns,
2798                                  rh);
2799
2800 }
2801
2802
2803 /**
2804  * Lookup of a record in a specific zone
2805  * calls lookup result processor on result
2806  *
2807  * @param zone the root zone
2808  * @param pzone the private local zone
2809  * @param record_type the record type to look up
2810  * @param name the name to look up
2811  * @param key a private key for use with PSEU import (can be NULL)
2812  * @param timeout timeout for resolution
2813  * @param only_cached GNUNET_NO to only check locally not DHT for performance
2814  * @param proc the processor to call on result
2815  * @param cls the closure to pass to proc
2816  */
2817 void
2818 gns_resolver_lookup_record(struct GNUNET_CRYPTO_ShortHashCode zone,
2819                            struct GNUNET_CRYPTO_ShortHashCode pzone,
2820                            uint32_t record_type,
2821                            const char* name,
2822                            struct GNUNET_CRYPTO_RsaPrivateKey *key,
2823                            struct GNUNET_TIME_Relative timeout,
2824                            int only_cached,
2825                            RecordLookupProcessor proc,
2826                            void* cls)
2827 {
2828   struct ResolverHandle *rh;
2829   struct RecordLookupHandle* rlh;
2830   char string_hash[MAX_DNS_LABEL_LENGTH];
2831   char nzkey[MAX_DNS_LABEL_LENGTH];
2832   char* nzkey_ptr = nzkey;
2833
2834   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2835               "Starting resolution for %s (type=%d)!\n",
2836               name, record_type);
2837
2838
2839   if (is_canonical((char*)name) && (strcmp(GNUNET_GNS_TLD, name) != 0))
2840   {
2841     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2842                 "%s is canonical and not gnunet -> cannot resolve!\n", name);
2843     proc(cls, 0, NULL);
2844     return;
2845   }
2846
2847   rlh = GNUNET_malloc(sizeof(struct RecordLookupHandle));
2848   rh = GNUNET_malloc(sizeof (struct ResolverHandle));
2849
2850   rh->authority = zone;
2851   rh->id = rid++;
2852   rh->proc_cls = rlh;
2853   rh->priv_key = key;
2854   rh->timeout = timeout;
2855   rh->get_handle = NULL;
2856   rh->private_local_zone = pzone;
2857   rh->only_cached = only_cached;
2858
2859   if (NULL == key)
2860   {
2861     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2862                 "No shorten key for resolution\n");
2863   }
2864
2865   if (timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
2866   {
2867     /*
2868      * Set timeout for authority lookup phase to 1/2
2869      */
2870     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2871                 "Timeout for lookup set to %ds\n", rh->timeout.rel_value);
2872     rh->timeout_task = GNUNET_SCHEDULER_add_delayed(
2873                                 GNUNET_TIME_relative_divide(timeout, 2),
2874                                                 &handle_lookup_timeout,
2875                                                 rh);
2876     rh->timeout_cont = &dht_authority_lookup_timeout;
2877     rh->timeout_cont_cls = rh;
2878   }
2879   else
2880   {
2881     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "No timeout for query!\n");
2882     rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2883   }
2884
2885   if (strcmp(GNUNET_GNS_TLD, name) == 0)
2886   {
2887     /**
2888      * Only 'gnunet' given
2889      */
2890     strcpy(rh->name, "\0");
2891   }
2892   else
2893   {
2894     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2895                 "Checking for TLD...\n");
2896     if (is_zkey_tld(name) == GNUNET_YES)
2897     {
2898       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2899                   "TLD is zkey\n");
2900       /**
2901        * This is a zkey tld
2902        * build hash and use as initial authority
2903        */
2904       memset(rh->name, 0,
2905              strlen(name)-strlen(GNUNET_GNS_TLD_ZKEY));
2906       memcpy(rh->name, name,
2907              strlen(name)-strlen(GNUNET_GNS_TLD_ZKEY) - 1);
2908       pop_tld(rh->name, string_hash);
2909
2910       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2911                   "ZKEY is %s!\n", string_hash);
2912
2913       GNUNET_STRINGS_utf8_toupper(string_hash, &nzkey_ptr);
2914
2915       if (GNUNET_OK != GNUNET_CRYPTO_short_hash_from_string(nzkey,
2916                                                       &rh->authority))
2917       {
2918         GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2919                     "Cannot convert ZKEY %s to hash!\n", string_hash);
2920         GNUNET_free(rh);
2921         GNUNET_free(rlh);
2922         proc(cls, 0, NULL);
2923         return;
2924       }
2925
2926     }
2927     else
2928     {
2929       GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2930                   "TLD is gnunet\n");
2931       /**
2932        * Presumably GNUNET tld
2933        */
2934       memset(rh->name, 0,
2935              strlen(name)-strlen(GNUNET_GNS_TLD));
2936       memcpy(rh->name, name,
2937              strlen(name)-strlen(GNUNET_GNS_TLD) - 1);
2938     }
2939   }
2940
2941   /**
2942    * Initialize authority chain
2943    */
2944   rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
2945   rh->authority_chain_head->prev = NULL;
2946   rh->authority_chain_head->next = NULL;
2947   rh->authority_chain_tail = rh->authority_chain_head;
2948   rh->authority_chain_head->zone = rh->authority;
2949
2950   /**
2951    * Copy original query into lookup handle
2952    */
2953   rlh->record_type = record_type;
2954   memset(rlh->name, 0, strlen(name) + 1);
2955   strcpy(rlh->name, name);
2956   rlh->proc = proc;
2957   rlh->proc_cls = cls;
2958
2959   rh->proc = &handle_delegation_ns;
2960   resolve_delegation_ns(rh);
2961 }
2962
2963 /******** END Record Resolver ***********/
2964
2965 /**
2966  * Callback calles by namestore for a zone to name
2967  * result
2968  *
2969  * @param cls the closure
2970  * @param zone_key the zone we queried
2971  * @param expire the expiration time of the name
2972  * @param name the name found or NULL
2973  * @param rd_len number of records for the name
2974  * @param rd the record data (PKEY) for the name
2975  * @param signature the signature for the record data
2976  */
2977 static void
2978 process_zone_to_name_shorten_root (void *cls,
2979                  const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
2980                  struct GNUNET_TIME_Absolute expire,
2981                  const char *name,
2982                  unsigned int rd_len,
2983                  const struct GNUNET_NAMESTORE_RecordData *rd,
2984                  const struct GNUNET_CRYPTO_RsaSignature *signature);
2985
2986
2987 /**
2988  * Callback called by namestore for a zone to name
2989  * result
2990  *
2991  * @param cls the closure
2992  * @param zone_key the zone we queried
2993  * @param expire the expiration time of the name
2994  * @param name the name found or NULL
2995  * @param rd_len number of records for the name
2996  * @param rd the record data (PKEY) for the name
2997  * @param signature the signature for the record data
2998  */
2999 static void
3000 process_zone_to_name_shorten_shorten (void *cls,
3001                  const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
3002                  struct GNUNET_TIME_Absolute expire,
3003                  const char *name,
3004                  unsigned int rd_len,
3005                  const struct GNUNET_NAMESTORE_RecordData *rd,
3006                  const struct GNUNET_CRYPTO_RsaSignature *signature)
3007 {
3008   struct ResolverHandle *rh = (struct ResolverHandle *)cls;
3009   struct NameShortenHandle* nsh = (struct NameShortenHandle*)rh->proc_cls;
3010   struct AuthorityChain *next_authority;
3011
3012   char result[MAX_DNS_NAME_LENGTH];
3013   char tmp_name[MAX_DNS_NAME_LENGTH];
3014   size_t answer_len;
3015
3016   /* we found a match in our own root zone */
3017   if (rd_len != 0)
3018   {
3019     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3020                "result strlen %d\n", strlen(name));
3021     answer_len = strlen(rh->name) + strlen(name) + strlen(GNUNET_GNS_TLD) + 3;
3022     memset(result, 0, answer_len);
3023
3024     if (strlen(rh->name) > 0)
3025     {
3026       sprintf (result, "%s.%s.%s.%s.%s",
3027                rh->name, name,
3028                nsh->shorten_zone_name, nsh->private_zone_name,
3029                GNUNET_GNS_TLD);
3030     }
3031     else
3032     {
3033       sprintf (result, "%s.%s.%s.%s", name,
3034                nsh->shorten_zone_name, nsh->private_zone_name,
3035                GNUNET_GNS_TLD);
3036     }
3037
3038     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3039                "Found shorten result %s\n", result);
3040     if (strlen (nsh->result) > strlen (result))
3041       strcpy (nsh->result, result);
3042   }
3043   else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3044                                         nsh->shorten_zone) == 0)
3045   {
3046     /**
3047      * This is our zone append .gnunet unless name is empty
3048      * (it shouldn't be, usually FIXME what happens if we
3049      * shorten to our zone to a "" record??)
3050      */
3051
3052     sprintf (result, "%s.%s.%s.%s",
3053              rh->name,
3054              nsh->shorten_zone_name, nsh->private_zone_name,
3055              GNUNET_GNS_TLD);
3056     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3057                "Our zone: Found %s as shorten result\n", result);
3058
3059     if (strlen (nsh->result) > strlen (result))
3060       strcpy (nsh->result, result);
3061     //nsh->proc(nsh->proc_cls, result);
3062     //GNUNET_free(nsh);
3063     //free_resolver_handle(rh);
3064     //return;
3065   }
3066
3067
3068   /**
3069    * No PSEU found.
3070    * continue with next authority if exists
3071    */
3072   if ((rh->authority_chain_head->next == NULL))
3073   {
3074     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3075                 "Sending %s as shorten result\n", nsh->result);
3076     nsh->proc(nsh->proc_cls, nsh->result);
3077     GNUNET_free (nsh);
3078     free_resolver_handle (rh);
3079     return;
3080   }
3081   next_authority = rh->authority_chain_head;
3082
3083   GNUNET_snprintf(tmp_name, MAX_DNS_NAME_LENGTH,
3084                   "%s.%s", rh->name, next_authority->name);
3085
3086   strcpy(rh->name, tmp_name);
3087   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3088              "No PSEU found for authority %s. Promoting back: %s\n",
3089              next_authority->name, rh->name);
3090
3091   GNUNET_CONTAINER_DLL_remove(rh->authority_chain_head,
3092                             rh->authority_chain_tail,
3093                             next_authority);
3094
3095   GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3096                                  &rh->authority_chain_tail->zone,
3097                                  &rh->authority_chain_head->zone,
3098                                  &process_zone_to_name_shorten_root,
3099                                  rh);
3100 }
3101
3102 /**
3103  * Callback calles by namestore for a zone to name
3104  * result
3105  *
3106  * @param cls the closure
3107  * @param zone_key the zone we queried
3108  * @param expire the expiration time of the name
3109  * @param name the name found or NULL
3110  * @param rd_len number of records for the name
3111  * @param rd the record data (PKEY) for the name
3112  * @param signature the signature for the record data
3113  */
3114 static void
3115 process_zone_to_name_shorten_private (void *cls,
3116                  const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
3117                  struct GNUNET_TIME_Absolute expire,
3118                  const char *name,
3119                  unsigned int rd_len,
3120                  const struct GNUNET_NAMESTORE_RecordData *rd,
3121                  const struct GNUNET_CRYPTO_RsaSignature *signature)
3122 {
3123   struct ResolverHandle *rh = (struct ResolverHandle *)cls;
3124   struct NameShortenHandle* nsh = (struct NameShortenHandle*)rh->proc_cls;
3125   struct AuthorityChain *next_authority;
3126
3127   char result[MAX_DNS_NAME_LENGTH];
3128   char tmp_name[MAX_DNS_NAME_LENGTH];
3129   size_t answer_len;
3130
3131   /* we found a match in our own root zone */
3132   if (rd_len != 0)
3133   {
3134     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3135                "result strlen %d\n", strlen(name));
3136     answer_len = strlen(rh->name) + strlen(name) + strlen(GNUNET_GNS_TLD) + 3;
3137     memset(result, 0, answer_len);
3138
3139     if (strlen(rh->name) > 0)
3140     {
3141       sprintf (result, "%s.%s.%s", rh->name, name, GNUNET_GNS_TLD);
3142     }
3143     else
3144     {
3145       sprintf (result, "%s.%s", name, GNUNET_GNS_TLD);
3146     }
3147
3148     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3149                "Found shorten result %s\n", result);
3150     if (strlen (nsh->result) > strlen (result))
3151       strcpy (nsh->result, result);
3152   }
3153   else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3154                                         nsh->private_zone) == 0)
3155   {
3156     /**
3157      * This is our zone append .gnunet unless name is empty
3158      * (it shouldn't be, usually FIXME what happens if we
3159      * shorten to our zone to a "" record??)
3160      */
3161
3162     sprintf (result, "%s.%s.%s",
3163              rh->name, nsh->private_zone_name, GNUNET_GNS_TLD);
3164     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3165                "Our private zone: Found %s as shorten result %s\n", result);
3166     if (strlen (nsh->result) > strlen (result))
3167       strcpy (nsh->result, result);
3168   }
3169
3170   if (nsh->shorten_zone != NULL)
3171   {
3172     /* backtrack authorities for names in priv zone */
3173     GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3174                                    nsh->shorten_zone,
3175                                    &rh->authority_chain_head->zone,
3176                                    &process_zone_to_name_shorten_shorten,
3177                                    rh);
3178   }
3179   else
3180   {
3181     /**
3182      * No PSEU found.
3183      * continue with next authority if exists
3184      */
3185     if ((rh->authority_chain_head->next == NULL))
3186     {
3187       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3188                  "Sending %s as shorten result\n", nsh->result);
3189       nsh->proc(nsh->proc_cls, nsh->result);
3190       GNUNET_free(nsh);
3191       free_resolver_handle(rh);
3192       return;
3193     }
3194     next_authority = rh->authority_chain_head;
3195
3196     GNUNET_snprintf(tmp_name, MAX_DNS_NAME_LENGTH,
3197                     "%s.%s", rh->name, next_authority->name);
3198
3199     strcpy(rh->name, tmp_name);
3200     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3201                "No PSEU found for authority %s. Promoting back: %s\n",
3202                next_authority->name, rh->name);
3203
3204     GNUNET_CONTAINER_DLL_remove(rh->authority_chain_head,
3205                               rh->authority_chain_tail,
3206                               next_authority);
3207
3208     GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3209                                    &rh->authority_chain_tail->zone,
3210                                    &rh->authority_chain_head->zone,
3211                                    &process_zone_to_name_shorten_root,
3212                                    rh);
3213   }
3214 }
3215
3216 /**
3217  * Callback calles by namestore for a zone to name
3218  * result
3219  *
3220  * @param cls the closure
3221  * @param zone_key the zone we queried
3222  * @param expire the expiration time of the name
3223  * @param name the name found or NULL
3224  * @param rd_len number of records for the name
3225  * @param rd the record data (PKEY) for the name
3226  * @param signature the signature for the record data
3227  */
3228 static void
3229 process_zone_to_name_shorten_root (void *cls,
3230                  const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
3231                  struct GNUNET_TIME_Absolute expire,
3232                  const char *name,
3233                  unsigned int rd_len,
3234                  const struct GNUNET_NAMESTORE_RecordData *rd,
3235                  const struct GNUNET_CRYPTO_RsaSignature *signature)
3236 {
3237   struct ResolverHandle *rh = (struct ResolverHandle *)cls;
3238   struct NameShortenHandle* nsh = (struct NameShortenHandle*)rh->proc_cls;
3239   struct AuthorityChain *next_authority;
3240
3241   char result[MAX_DNS_NAME_LENGTH];
3242   char tmp_name[MAX_DNS_NAME_LENGTH];
3243   size_t answer_len;
3244
3245   /* we found a match in our own root zone */
3246   if (rd_len != 0)
3247   {
3248     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3249                "result strlen %d\n", strlen(name));
3250     answer_len = strlen(rh->name) + strlen(name) + strlen(GNUNET_GNS_TLD) + 3;
3251     memset(result, 0, answer_len);
3252
3253     if (strlen(rh->name) > 0)
3254     {
3255       sprintf (result, "%s.%s.%s", rh->name, name, GNUNET_GNS_TLD);
3256     }
3257     else
3258     {
3259       sprintf (result, "%s.%s", name, GNUNET_GNS_TLD);
3260     }
3261
3262     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3263                "Found shorten result %s\n", result);
3264     if (strlen (nsh->result) > strlen (result))
3265       strcpy (nsh->result, result);
3266   }
3267   else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3268                                         nsh->root_zone) == 0)
3269   {
3270     /**
3271      * This is our zone append .gnunet unless name is empty
3272      * (it shouldn't be, usually FIXME what happens if we
3273      * shorten to our zone to a "" record??)
3274      */
3275
3276     sprintf (result, "%s.%s", rh->name, GNUNET_GNS_TLD);
3277     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3278                "Our zone: Found %s as shorten result\n", result);
3279     if (strlen (nsh->result) > strlen (result))
3280       strcpy (nsh->result, result);
3281   }
3282
3283   if (nsh->private_zone != NULL)
3284   {
3285     /* backtrack authorities for names in priv zone */
3286     GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3287                                    nsh->private_zone,
3288                                    &rh->authority_chain_head->zone,
3289                                    &process_zone_to_name_shorten_private,
3290                                    rh);
3291   }
3292   else
3293   {
3294     /**
3295      * No PSEU found.
3296      * continue with next authority if exists
3297      */
3298     if ((rh->authority_chain_head->next == NULL))
3299     {
3300       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3301                  "Sending %s as shorten result\n", nsh->result);
3302       nsh->proc(nsh->proc_cls, nsh->result);
3303       GNUNET_free(nsh);
3304       free_resolver_handle(rh);
3305       return;
3306     }
3307     next_authority = rh->authority_chain_head;
3308
3309     GNUNET_snprintf(tmp_name, MAX_DNS_NAME_LENGTH,
3310                     "%s.%s", rh->name, next_authority->name);
3311
3312     strcpy(rh->name, tmp_name);
3313     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3314                "No PSEU found for authority %s. Promoting back: %s\n",
3315                next_authority->name, rh->name);
3316
3317     GNUNET_CONTAINER_DLL_remove(rh->authority_chain_head,
3318                               rh->authority_chain_tail,
3319                               next_authority);
3320
3321     GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3322                                    &rh->authority_chain_tail->zone,
3323                                    &rh->authority_chain_head->zone,
3324                                    &process_zone_to_name_shorten_root,
3325                                    rh);
3326   }
3327 }
3328
3329
3330 /**
3331  * Process result from namestore delegation lookup
3332  * for shorten operation
3333  *
3334  * @param cls the client shorten handle
3335  * @param rh the resolver handle
3336  * @param rd_count number of results (0)
3337  * @param rd data (NULL)
3338  */
3339 void
3340 handle_delegation_ns_shorten(void* cls,
3341                       struct ResolverHandle *rh,
3342                       uint32_t rd_count,
3343                       const struct GNUNET_NAMESTORE_RecordData *rd)
3344 {
3345   struct NameShortenHandle *nsh;
3346   char result[MAX_DNS_NAME_LENGTH];
3347
3348   nsh = (struct NameShortenHandle *)cls;
3349
3350   /**
3351    * At this point rh->name contains the part of the name
3352    * that we do not have a PKEY in our namestore to resolve.
3353    * The authority chain in the resolver handle is now
3354    * useful to backtrack if needed
3355    */
3356
3357   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3358              "PKEY resolved as far as possible in ns up to %s!\n", rh->name);
3359   memset(result, 0, sizeof (result));
3360
3361   if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3362                                    nsh->root_zone) == 0)
3363   {
3364     /**
3365      * This is our zone append .gnunet unless name is empty
3366      * (it shouldn't be, usually FIXME what happens if we
3367      * shorten to our zone to a "" record??)
3368      */
3369
3370     sprintf (result, "%s.%s", rh->name, GNUNET_GNS_TLD);
3371     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3372                "Our zone: Found %s as shorten result\n", result);
3373
3374     if (strlen (nsh->result) > strlen (result))
3375       strcpy (nsh->result, result);
3376
3377   }
3378   else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3379                                         nsh->private_zone) == 0)
3380   {
3381     /**
3382      * This is our zone append .gnunet unless name is empty
3383      * (it shouldn't be, usually FIXME what happens if we
3384      * shorten to our zone to a "" record??)
3385      */
3386
3387     sprintf (result, "%s.%s.%s",
3388              rh->name, nsh->private_zone_name, GNUNET_GNS_TLD);
3389     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3390                "Our zone: Found %s as shorten result %s\n", result);
3391
3392     if (strlen (nsh->result) > strlen (result))
3393       strcpy (nsh->result, result);
3394   }
3395   else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
3396                                         nsh->shorten_zone) == 0)
3397   {
3398     /**
3399      * This is our zone append .gnunet unless name is empty
3400      * (it shouldn't be, usually FIXME what happens if we
3401      * shorten to our zone to a "" record??)
3402      */
3403
3404     sprintf (result, "%s.%s.%s",
3405              rh->name, nsh->private_zone_name, GNUNET_GNS_TLD);
3406     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3407                "Our zone: Found %s as shorten result\n", result);
3408
3409     if (strlen (nsh->result) > strlen (result))
3410       strcpy (nsh->result, result);
3411   }
3412
3413
3414   /* backtrack authorities for names */
3415   GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3416                                  nsh->root_zone,
3417                                  &rh->authority_chain_head->zone,
3418                                  &process_zone_to_name_shorten_root,
3419                                  rh);
3420
3421 }
3422
3423
3424 /**
3425  * Callback calles by namestore for a zone to name
3426  * result
3427  *
3428  * @param cls the closure
3429  * @param zone_key the zone we queried
3430  * @param expire the expiration time of the name
3431  * @param name the name found or NULL
3432  * @param rd_len number of records for the name
3433  * @param rd the record data (PKEY) for the name
3434  * @param signature the signature for the record data
3435  */
3436 static void
3437 process_zone_to_name_zkey(void *cls,
3438                  const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
3439                  struct GNUNET_TIME_Absolute expire,
3440                  const char *name,
3441                  unsigned int rd_len,
3442                  const struct GNUNET_NAMESTORE_RecordData *rd,
3443                  const struct GNUNET_CRYPTO_RsaSignature *signature)
3444 {
3445   struct ResolverHandle *rh = cls;
3446   struct NameShortenHandle *nsh = rh->proc_cls;
3447   struct GNUNET_CRYPTO_ShortHashAsciiEncoded enc;
3448   char new_name[MAX_DNS_NAME_LENGTH];
3449
3450   /* zkey not in our zone */
3451   if (name == NULL)
3452   {
3453     /**
3454      * In this case we have not given this PKEY a name (yet)
3455      * It is either just not in our zone or not even cached
3456      * Since we do not know at this point we will not try to shorten
3457      * because PKEY import will happen if the user follows the zkey
3458      * link.
3459      */
3460     GNUNET_CRYPTO_short_hash_to_enc ((struct GNUNET_CRYPTO_ShortHashCode*)rd,
3461                                      &enc);
3462     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3463                "No name found for zkey %s returning verbatim!\n", enc);
3464     if (strcmp(rh->name, "") != 0)
3465       GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s.%s",
3466                       rh->name, enc, GNUNET_GNS_TLD_ZKEY);
3467     else
3468       GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
3469                       enc, GNUNET_GNS_TLD_ZKEY);
3470
3471     strcpy (nsh->result, new_name);
3472
3473     nsh->proc(nsh->proc_cls, new_name);
3474     GNUNET_free(nsh);
3475     free_resolver_handle(rh);
3476     return;
3477   }
3478
3479   if (strcmp(rh->name, "") != 0)
3480     GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
3481                     rh->name, name);
3482   else
3483     strcpy(new_name, name);
3484
3485   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3486              "Continue shorten for %s!\n", new_name);
3487
3488   strcpy(rh->name, new_name);
3489
3490   rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
3491   rh->authority_chain_tail = rh->authority_chain_head;
3492   rh->authority_chain_head->zone = rh->authority;
3493
3494
3495   /* Start delegation resolution in our namestore */
3496   resolve_delegation_ns(rh);
3497 }
3498
3499
3500 /**
3501  * Shorten api from resolver
3502  *
3503  * @param zone the root zone to use
3504  * @param pzone the private zone to use
3505  * @param szone the shorten zone to use
3506  * @param name the name to shorten
3507  * @param private_zone_name name of the private zone
3508  * @param shorten_zone_name name of the shorten zone
3509  * @param proc the processor to call with result
3510  * @param proc_cls closure to pass to proc
3511  */
3512 void
3513 gns_resolver_shorten_name (struct GNUNET_CRYPTO_ShortHashCode *zone,
3514                            struct GNUNET_CRYPTO_ShortHashCode *pzone,
3515                            struct GNUNET_CRYPTO_ShortHashCode *szone,
3516                            const char* name,
3517                            const char* private_zone_name,
3518                            const char* shorten_zone_name,
3519                            ShortenResultProcessor proc,
3520                            void* proc_cls)
3521 {
3522   struct ResolverHandle *rh;
3523   struct NameShortenHandle *nsh;
3524   char string_hash[MAX_DNS_LABEL_LENGTH];
3525   struct GNUNET_CRYPTO_ShortHashCode zkey;
3526   char nzkey[MAX_DNS_LABEL_LENGTH];
3527   char* nzkey_ptr = nzkey;
3528
3529
3530   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3531               "Starting shorten for %s!\n", name);
3532
3533   if (is_canonical ((char*)name))
3534   {
3535     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3536                 "%s is canonical. Returning verbatim\n", name);
3537     proc (proc_cls, name);
3538     return;
3539   }
3540
3541   nsh = GNUNET_malloc (sizeof (struct NameShortenHandle));
3542
3543   nsh->proc = proc;
3544   nsh->proc_cls = proc_cls;
3545   nsh->root_zone = zone;
3546   nsh->private_zone = pzone;
3547   nsh->shorten_zone = szone;
3548   strcpy (nsh->private_zone_name, private_zone_name);
3549   strcpy (nsh->shorten_zone_name, shorten_zone_name);
3550   strcpy (nsh->result, name);
3551
3552   rh = GNUNET_malloc (sizeof (struct ResolverHandle));
3553   rh->authority = *zone;
3554   rh->id = rid++;
3555   rh->priv_key = NULL;
3556   rh->proc = &handle_delegation_ns_shorten;
3557   rh->proc_cls = nsh;
3558   rh->id = rid++;
3559   rh->private_local_zone = *zone;
3560
3561   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3562                 "Checking for TLD...\n");
3563   if (is_zkey_tld (name) == GNUNET_YES)
3564   {
3565     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3566                 "TLD is zkey\n");
3567     /**
3568      * This is a zkey tld
3569      * build hash and use as initial authority
3570      * FIXME sscanf
3571      */
3572     memset (rh->name, 0,
3573             strlen (name)-strlen (GNUNET_GNS_TLD_ZKEY));
3574     memcpy (rh->name, name,
3575             strlen(name)-strlen (GNUNET_GNS_TLD_ZKEY) - 1);
3576     pop_tld (rh->name, string_hash);
3577
3578     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3579                 "ZKEY is %s!\n", string_hash);
3580
3581     GNUNET_STRINGS_utf8_toupper (string_hash, &nzkey_ptr);
3582
3583     if (GNUNET_OK != GNUNET_CRYPTO_short_hash_from_string (nzkey,
3584                                                            &zkey))
3585     {
3586       GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3587                   "Cannot convert ZKEY %s to hash!\n", nzkey);
3588       GNUNET_free (rh);
3589       GNUNET_free (nsh);
3590       proc (proc_cls, name);
3591       return;
3592     }
3593
3594     GNUNET_NAMESTORE_zone_to_name (namestore_handle,
3595                                    zone, //ours
3596                                    &zkey,
3597                                    &process_zone_to_name_zkey,
3598                                    rh);
3599     return;
3600
3601   }
3602   else
3603   {
3604     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3605                 "TLD is gnunet\n");
3606     /**
3607      * Presumably GNUNET tld
3608      */
3609     memset (rh->name, 0,
3610             strlen (name)-strlen (GNUNET_GNS_TLD));
3611     memcpy (rh->name, name,
3612             strlen (name)-strlen (GNUNET_GNS_TLD) - 1);
3613   }
3614
3615   rh->authority_chain_head = GNUNET_malloc (sizeof (struct AuthorityChain));
3616   rh->authority_chain_tail = rh->authority_chain_head;
3617   rh->authority_chain_head->zone = *zone;
3618
3619
3620   /* Start delegation resolution in our namestore */
3621   resolve_delegation_ns (rh);
3622 }
3623
3624 /*********** END NAME SHORTEN ********************/
3625
3626
3627 /**
3628  * Process result from namestore delegation lookup
3629  * for get authority operation
3630  *
3631  * @param cls the client get auth handle
3632  * @param rh the resolver handle
3633  * @param rd_count number of results (0)
3634  * @param rd data (NULL)
3635  */
3636 void
3637 handle_delegation_result_ns_get_auth(void* cls,
3638                       struct ResolverHandle *rh,
3639                       uint32_t rd_count,
3640                       const struct GNUNET_NAMESTORE_RecordData *rd)
3641 {
3642   struct GetNameAuthorityHandle* nah;
3643   char result[MAX_DNS_NAME_LENGTH];
3644   size_t answer_len;
3645
3646   nah = (struct GetNameAuthorityHandle*) rh->proc_cls;
3647
3648   /**
3649    * At this point rh->name contains the part of the name
3650    * that we do not have a PKEY in our namestore to resolve.
3651    * The authority chain in the resolver handle is now
3652    * useful to backtrack if needed
3653    */
3654
3655   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3656              "PKEY resolved as far as possible in ns up to %s!\n", rh->name);
3657
3658   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3659              "Building response!\n");
3660   if (is_canonical(rh->name))
3661   {
3662     /**
3663      * We successfully resolved the authority in the ns
3664      * FIXME for our purposes this is fine
3665      * but maybe we want to have an api that also looks
3666      * into the dht (i.e. option in message)
3667      **/
3668     if (strlen(rh->name) > strlen(nah->name))
3669     {
3670       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3671                  "Record name longer than original lookup name... odd!\n");
3672       //FIXME to sth here
3673     }
3674
3675     answer_len = strlen(nah->name) - strlen(rh->name)
3676       + strlen(GNUNET_GNS_TLD) + 1;
3677     memset(result, 0, answer_len);
3678     strcpy(result, nah->name + strlen(rh->name) + 1);
3679
3680     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3681                "Got authority result %s\n", result);
3682
3683     nah->proc(nah->proc_cls, result);
3684     GNUNET_free(nah);
3685     free_resolver_handle(rh);
3686   }
3687   else
3688   {
3689     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3690                "Unable to resolve authority for remaining %s!\n", rh->name);
3691     nah->proc(nah->proc_cls, "");
3692     GNUNET_free(nah);
3693     free_resolver_handle(rh);
3694   }
3695
3696
3697 }
3698
3699
3700 /**
3701  * Tries to resolve the authority for name
3702  * in our namestore
3703  *
3704  * @param zone the root zone to look up for
3705  * @param pzone the private local zone
3706  * @param name the name to lookup up
3707  * @param proc the processor to call when finished
3708  * @param proc_cls the closure to pass to the processor
3709  */
3710 void
3711 gns_resolver_get_authority(struct GNUNET_CRYPTO_ShortHashCode zone,
3712                            struct GNUNET_CRYPTO_ShortHashCode pzone,
3713                            const char* name,
3714                            GetAuthorityResultProcessor proc,
3715                            void* proc_cls)
3716 {
3717   struct ResolverHandle *rh;
3718   struct GetNameAuthorityHandle *nah;
3719
3720   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3721               "Starting authority resolution for %s!\n", name);
3722
3723   nah = GNUNET_malloc(sizeof (struct GetNameAuthorityHandle));
3724   rh = GNUNET_malloc(sizeof (struct ResolverHandle));
3725   rh->authority = zone;
3726   rh->id = rid++;
3727   rh->private_local_zone = pzone;
3728
3729   if (strcmp(GNUNET_GNS_TLD, name) == 0)
3730   {
3731     strcpy(rh->name, "\0");
3732   }
3733   else
3734   {
3735     memset(rh->name, 0,
3736            strlen(name)-strlen(GNUNET_GNS_TLD));
3737     memcpy(rh->name, name,
3738            strlen(name)-strlen(GNUNET_GNS_TLD) - 1);
3739   }
3740
3741   memset(nah->name, 0,
3742          strlen(name)+1);
3743   strcpy(nah->name, name);
3744
3745   rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
3746   rh->authority_chain_tail = rh->authority_chain_head;
3747   rh->authority_chain_head->zone = zone;
3748   rh->proc = &handle_delegation_result_ns_get_auth;
3749   rh->proc_cls = (void*)nah;
3750
3751   nah->proc = proc;
3752   nah->proc_cls = proc_cls;
3753
3754   /* Start delegation resolution in our namestore */
3755   resolve_delegation_ns(rh);
3756
3757 }
3758
3759 /******** END GET AUTHORITY *************/
3760
3761 /* end of gnunet-service-gns_resolver.c */