src/gns/gnunet-service-gns.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  * TODO:
  24  *    - Write xquery and block plugin
  25  *    - The smaller FIXME issues all around
  26  *
  27  * @file gns/gnunet-service-gns.c
  28  * @brief GNUnet GNS service
  29  * @author Martin Schanzenbach
  30  */
  31 #include "platform.h"
  32 #include "gnunet_util_lib.h"
  33 #include "gnunet_transport_service.h"
  34 #include "gnunet_dns_service.h"
  35 #include "gnunet_dnsparser_lib.h"
  36 #include "gnunet_dht_service.h"
  37 #include "gnunet_namestore_service.h"
  38 #include "gnunet_gns_service.h"
  39 #include "block_gns.h"
  40 #include "gns.h"
  41
  42 #define DHT_OPERATION_TIMEOUT  GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
  43 #define DHT_LOOKUP_TIMEOUT DHT_OPERATION_TIMEOUT
  44 #define DHT_GNS_REPLICATION_LEVEL 5
  45
  46 /* Ignore for now not used anyway and probably never will */
  47 #define GNUNET_MESSAGE_TYPE_GNS_CLIENT_LOOKUP 23
  48 #define GNUNET_MESSAGE_TYPE_GNS_CLIENT_RESULT 24
  49
  50 /**
  51  * Handle to a currenty pending resolution
  52  */
  53 struct GNUNET_GNS_ResolverHandle
  54 {
  55   /* The name to resolve */
  56   char *name;
  57
  58   /* the request handle to reply to */
  59   struct GNUNET_DNS_RequestHandle *request_handle;
  60
  61   /* the dns parser packet received */
  62   struct GNUNET_DNSPARSER_Packet *packet;
  63
  64   /* the query parsed from the packet */
  65
  66   struct GNUNET_DNSPARSER_Query *query;
  67
  68   /* has this query been answered? how many matches */
  69   int answered;
  70
  71   /* the authoritative zone to query */
  72   GNUNET_HashCode authority;
  73
  74   /* the name of the authoritative zone to query */
  75   char *authority_name;
  76
  77   /**
  78    * we have an authority in namestore that
  79    * may be able to resolve
  80    */
  81   int authority_found;
  82
  83   /* a handle for dht lookups. should be NULL if no lookups are in progress */
  84   struct GNUNET_DHT_GetHandle *get_handle;
  85
  86   /* timeout task for dht lookups */
  87   GNUNET_SCHEDULER_TaskIdentifier dht_timeout_task;
  88
  89 };
  90
  91
  92 /**
  93  * Our handle to the DNS handler library
  94  */
  95 struct GNUNET_DNS_Handle *dns_handle;
  96
  97 /**
  98  * Our handle to the DHT
  99  */
 100 struct GNUNET_DHT_Handle *dht_handle;
 101
 102 /**
 103  * Our zone's private key
 104  */
 105 struct GNUNET_CRYPTO_RsaPrivateKey *zone_key;
 106
 107 /**
 108  * Our handle to the namestore service
 109  * FIXME maybe need a second handle for iteration
 110  */
 111 struct GNUNET_NAMESTORE_Handle *namestore_handle;
 112
 113 /**
 114  * Handle to iterate over our authoritative zone in namestore
 115  */
 116 struct GNUNET_NAMESTORE_ZoneIterator *namestore_iter;
 117
 118 /**
 119  * The configuration the GNS service is running with
 120  */
 121 const struct GNUNET_CONFIGURATION_Handle *GNS_cfg;
 122
 123 /**
 124  * Our notification context.
 125  */
 126 static struct GNUNET_SERVER_NotificationContext *nc;
 127
 128 /**
 129  * Our zone hash
 130  */
 131 GNUNET_HashCode zone_hash;
 132
 133 /**
 134  * Our tld. Maybe get from config file
 135  */
 136 const char* gnunet_tld = ".gnunet";
 137
 138 /**
 139  * Useful for zone update for DHT put
 140  */
 141 static int num_public_records =  3600;
 142 struct GNUNET_TIME_Relative dht_update_interval;
 143 GNUNET_SCHEDULER_TaskIdentifier zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
 144
 145 /* Prototypes */
 146 static void reply_to_dns(struct GNUNET_GNS_ResolverHandle *answer,
 147                          uint32_t rd_count,
 148                          const struct GNUNET_NAMESTORE_RecordData *rd);
 149 static void resolve_name(struct GNUNET_GNS_ResolverHandle *rh);
 150
 151 /**
 152  * Task run during shutdown.
 153  *
 154  * @param cls unused
 155  * @param tc unused
 156  */
 157 static void
 158 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 159 {
 160   /* Kill zone task for it may make the scheduler hang */
 161   GNUNET_SCHEDULER_cancel(zone_update_taskid);
 162
 163   GNUNET_DNS_disconnect(dns_handle);
 164   GNUNET_NAMESTORE_disconnect(namestore_handle, 0);
 165   GNUNET_DHT_disconnect(dht_handle);
 166 }
 167
 168 /**
 169  * Callback when record data is put into namestore
 170  *
 171  * @param cls the closure
 172  * @param success GNUNET_OK on success
 173  * @param emsg the error message. NULL if SUCCESS==GNUNET_OK
 174  */
 175 void
 176 on_namestore_record_put_result(void *cls,
 177                                int32_t success,
 178                                const char *emsg)
 179 {
 180   if (GNUNET_NO == success)
 181   {
 182     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "records already in namestore\n");
 183     return;
 184   }
 185   else if (GNUNET_YES == success)
 186   {
 187     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 188                "records successfully put in namestore\n");
 189     return;
 190   }
 191
 192   GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
 193              "Error putting records into namestore: %s\n", emsg);
 194 }
 195
 196 /**
 197  * Handle timeout for DHT requests
 198  *
 199  * @param cls the request handle as closure
 200  * @param tc the task context
 201  */
 202 static void
 203 dht_lookup_timeout(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 204 {
 205   struct GNUNET_GNS_ResolverHandle *rh = cls;
 206
 207   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 208              "dht lookup for query %s (type=%d) timed out.\n",
 209              rh->name, rh->query->type);
 210
 211   GNUNET_DHT_get_stop (rh->get_handle);
 212   reply_to_dns(rh, 0, NULL);
 213 }
 214
 215 /**
 216  * Function called when we get a result from the dht
 217  * for our query
 218  *
 219  * @param cls the request handle
 220  * @param exp lifetime
 221  * @param key the key the record was stored under
 222  * @param get_path get path
 223  * @param get_path_length get path length
 224  * @param put_path put path
 225  * @param put_path_length put path length
 226  * @param type the block type
 227  * @param size the size of the record
 228  * @param data the record data
 229  */
 230 static void
 231 process_authority_dht_result(void* cls,
 232                  struct GNUNET_TIME_Absolute exp,
 233                  const GNUNET_HashCode * key,
 234                  const struct GNUNET_PeerIdentity *get_path,
 235                  unsigned int get_path_length,
 236                  const struct GNUNET_PeerIdentity *put_path,
 237                  unsigned int put_path_length,
 238                  enum GNUNET_BLOCK_Type type,
 239                  size_t size, const void *data)
 240 {
 241   struct GNUNET_GNS_ResolverHandle *rh;
 242   struct GNSNameRecordBlock *nrb;
 243   uint32_t num_records;
 244   char* name = NULL;
 245   char* rd_data = (char*) data;
 246   int i;
 247   int rd_size;
 248   GNUNET_HashCode zone, name_hash;
 249
 250   if (data == NULL)
 251     return;
 252
 253   //FIXME check expiration?
 254
 255   rh = (struct GNUNET_GNS_ResolverHandle *)cls;
 256   nrb = (struct GNSNameRecordBlock*)data;
 257
 258   /* stop dht lookup and timeout task */
 259   GNUNET_DHT_get_stop (rh->get_handle);
 260   GNUNET_SCHEDULER_cancel(rh->dht_timeout_task);
 261
 262   rh->get_handle = NULL;
 263   num_records = ntohl(nrb->rd_count);
 264   name = (char*)&nrb[1];
 265   {
 266     struct GNUNET_NAMESTORE_RecordData rd[num_records];
 267
 268     rd_data += strlen(name) + sizeof(struct GNSNameRecordBlock);
 269     rd_size = size - strlen(name) - sizeof(struct GNSNameRecordBlock);
 270
 271     if (GNUNET_SYSERR == GNUNET_NAMESTORE_records_deserialize (rd_size,
 272                                                                rd_data,
 273                                                                num_records,
 274                                                                rd))
 275     {
 276       GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Error deserializing data!\n");
 277       return;
 278     }
 279
 280     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 281                "Got name: %s (wanted %s)\n", name, rh->authority_name);
 282     for (i=0; i<num_records; i++)
 283     {
 284
 285       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 286                 "Got name: %s (wanted %s)\n", name, rh->authority_name);
 287       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 288                  "Got type: %d (wanted %d)\n",
 289                  rd[i].record_type, GNUNET_GNS_RECORD_PKEY);
 290       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 291                  "Got data length: %d\n", rd[i].data_size);
 292       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 293                  "Got flag %d\n", rd[i].flags);
 294
 295       if ((strcmp(name, rh->authority_name) == 0) &&
 296           (rd[i].record_type == GNUNET_GNS_RECORD_PKEY))
 297       {
 298         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Authority found in DHT\n");
 299         rh->answered = 1;
 300         GNUNET_CRYPTO_hash(
 301                    (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *)rd[i].data,
 302                    rd[i].data_size,
 303                    &rh->authority);
 304       }
 305
 306     }
 307
 308
 309     GNUNET_CRYPTO_hash(name, strlen(name), &name_hash);
 310     GNUNET_CRYPTO_hash_xor(key, &name_hash, &zone);
 311
 312     /* Save to namestore */
 313     if (0 == GNUNET_CRYPTO_hash_cmp(&zone_hash, &zone))
 314     {
 315       GNUNET_NAMESTORE_record_put (namestore_handle,
 316                                  &nrb->public_key,
 317                                  name,
 318                                  exp,
 319                                  num_records,
 320                                  rd,
 321                                  &nrb->signature,
 322                                  &on_namestore_record_put_result, //cont
 323                                  NULL); //cls
 324     }
 325   }
 326
 327   if (rh->answered)
 328   {
 329     rh->answered = 0;
 330     resolve_name(rh);
 331     return;
 332   }
 333   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "No authority in records\n");
 334   reply_to_dns(rh, 0, NULL);
 335 }
 336
 337 /**
 338  * Start DHT lookup for a name -> PKEY (compare NS) record in
 339  * query->authority's zone
 340  *
 341  * @param rh the pending gns query
 342  * @param name the name of the PKEY record
 343  */
 344 static void
 345 resolve_authority_dht(struct GNUNET_GNS_ResolverHandle *rh)
 346 {
 347   uint32_t xquery;
 348   GNUNET_HashCode name_hash;
 349   GNUNET_HashCode lookup_key;
 350
 351   GNUNET_CRYPTO_hash(rh->authority_name,
 352                      strlen(rh->authority_name),
 353                      &name_hash);
 354   GNUNET_CRYPTO_hash_xor(&name_hash, &rh->authority, &lookup_key);
 355
 356   rh->dht_timeout_task = GNUNET_SCHEDULER_add_delayed (DHT_LOOKUP_TIMEOUT,
 357                                                        &dht_lookup_timeout, rh);
 358
 359   xquery = htonl(GNUNET_GNS_RECORD_PKEY);
 360   //FIXME how long to wait for results?
 361   rh->get_handle = GNUNET_DHT_get_start(dht_handle,
 362                        DHT_OPERATION_TIMEOUT,
 363                        GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
 364                        &lookup_key,
 365                        DHT_GNS_REPLICATION_LEVEL,
 366                        GNUNET_DHT_RO_NONE,
 367                        &xquery,
 368                        sizeof(xquery),
 369                        &process_authority_dht_result,
 370                        rh);
 371
 372 }
 373
 374 /**
 375  * Function called when we get a result from the dht
 376  * for our query
 377  *
 378  * @param cls the request handle
 379  * @param exp lifetime
 380  * @param key the key the record was stored under
 381  * @param get_path get path
 382  * @param get_path_length get path length
 383  * @param put_path put path
 384  * @param put_path_length put path length
 385  * @param type the block type
 386  * @param size the size of the record
 387  * @param data the record data
 388  */
 389 static void
 390 process_name_dht_result(void* cls,
 391                  struct GNUNET_TIME_Absolute exp,
 392                  const GNUNET_HashCode * key,
 393                  const struct GNUNET_PeerIdentity *get_path,
 394                  unsigned int get_path_length,
 395                  const struct GNUNET_PeerIdentity *put_path,
 396                  unsigned int put_path_length,
 397                  enum GNUNET_BLOCK_Type type,
 398                  size_t size, const void *data)
 399 {
 400   struct GNUNET_GNS_ResolverHandle *rh;
 401   struct GNSNameRecordBlock *nrb;
 402   uint32_t num_records;
 403   char* name = NULL;
 404   char* rd_data = (char*)data;
 405   int i;
 406   int rd_size;
 407
 408   GNUNET_HashCode zone, name_hash;
 409   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "got dht result (size=%d)\n", size);
 410
 411   if (data == NULL)
 412     return;
 413
 414   //FIXME maybe check expiration here, check block type
 415
 416   rh = (struct GNUNET_GNS_ResolverHandle *)cls;
 417   nrb = (struct GNSNameRecordBlock*)data;
 418
 419   /* stop lookup and timeout task */
 420   GNUNET_DHT_get_stop (rh->get_handle);
 421   GNUNET_SCHEDULER_cancel(rh->dht_timeout_task);
 422
 423   rh->get_handle = NULL;
 424   name = (char*)&nrb[1];
 425   num_records = ntohl(nrb->rd_count);
 426   {
 427     struct GNUNET_NAMESTORE_RecordData rd[num_records];
 428
 429     rd_data += strlen(name) + sizeof(struct GNSNameRecordBlock);
 430     rd_size = size - strlen(name) - sizeof(struct GNSNameRecordBlock);
 431
 432     if (GNUNET_SYSERR == GNUNET_NAMESTORE_records_deserialize (rd_size,
 433                                                                rd_data,
 434                                                                num_records,
 435                                                                rd))
 436     {
 437       GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Error deserializing data!\n");
 438       return;
 439     }
 440
 441     for (i=0; i<num_records; i++)
 442     {
 443       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 444                "Got name: %s (wanted %s)\n", name, rh->name);
 445       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 446                "Got type: %d (wanted %d)\n",
 447                rd[i].record_type, rh->query->type);
 448       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 449                "Got data length: %d\n", rd[i].data_size);
 450       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 451                "Got flag %d\n", rd[i].flags);
 452
 453      if ((strcmp(name, rh->name) == 0) &&
 454          (rd[i].record_type == rh->query->type))
 455       {
 456         rh->answered++;
 457       }
 458
 459     }
 460
 461     GNUNET_CRYPTO_hash(name, strlen(name), &name_hash);
 462     GNUNET_CRYPTO_hash_xor(key, &name_hash, &zone);
 463
 464     /**
 465      * FIXME check pubkey against existing key in namestore?
 466      * https://gnunet.org/bugs/view.php?id=2179
 467      */
 468
 469     /* Save to namestore */
 470     GNUNET_NAMESTORE_record_put (namestore_handle,
 471                                  &nrb->public_key,
 472                                  name,
 473                                  exp,
 474                                  num_records,
 475                                  rd,
 476                                  &nrb->signature,
 477                                  &on_namestore_record_put_result, //cont
 478                                  NULL); //cls
 479
 480     if (rh->answered)
 481       reply_to_dns(rh, num_records, rd);
 482     else
 483       reply_to_dns(rh, 0, NULL);
 484   }
 485
 486 }
 487
 488
 489
 490
 491 /**
 492  * Start DHT lookup for a (name -> query->record_type) record in
 493  * query->authority's zone
 494  *
 495  * @param rh the pending gns query context
 496  * @param name the name to query record
 497  */
 498 static void
 499 resolve_name_dht(struct GNUNET_GNS_ResolverHandle *rh, const char* name)
 500 {
 501   uint32_t xquery;
 502   GNUNET_HashCode name_hash;
 503   GNUNET_HashCode lookup_key;
 504   struct GNUNET_CRYPTO_HashAsciiEncoded lookup_key_string;
 505
 506   GNUNET_CRYPTO_hash(name, strlen(name), &name_hash);
 507   GNUNET_CRYPTO_hash_xor(&name_hash, &rh->authority, &lookup_key);
 508   GNUNET_CRYPTO_hash_to_enc (&lookup_key, &lookup_key_string);
 509
 510   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 511              "starting dht lookup for %s with key: %s\n",
 512              name, (char*)&lookup_key_string);
 513
 514   rh->dht_timeout_task = GNUNET_SCHEDULER_add_delayed(DHT_LOOKUP_TIMEOUT,
 515                                                       &dht_lookup_timeout, rh);
 516
 517   xquery = htonl(rh->query->type);
 518   //FIXME how long to wait for results?
 519   rh->get_handle = GNUNET_DHT_get_start(dht_handle,
 520                        DHT_OPERATION_TIMEOUT,
 521                        GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
 522                        &lookup_key,
 523                        DHT_GNS_REPLICATION_LEVEL,
 524                        GNUNET_DHT_RO_NONE,
 525                        &xquery,
 526                        sizeof(xquery),
 527                        &process_name_dht_result,
 528                        rh);
 529
 530 }
 531
 532 //Prototype
 533 static void
 534 resolve_name(struct GNUNET_GNS_ResolverHandle *rh);
 535
 536 /**
 537  * This is a callback function that should give us only PKEY
 538  * records. Used to query the namestore for the authority (PKEY)
 539  * for 'name'
 540  *
 541  * @param cls the pending query
 542  * @param key the key of the zone we did the lookup
 543  * @param expiration expiration date of the record data set in the namestore
 544  * @param name the name for which we need an authority
 545  * @param rd_count the number of records with 'name'
 546  * @param rd the record data
 547  * @param signature the signature of the authority for the record data
 548  */
 549 static void
 550 process_authority_lookup(void* cls,
 551                    const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
 552                    struct GNUNET_TIME_Absolute expiration,
 553                    const char *name,
 554                    unsigned int rd_count,
 555                    const struct GNUNET_NAMESTORE_RecordData *rd,
 556                    const struct GNUNET_CRYPTO_RsaSignature *signature)
 557 {
 558   struct GNUNET_GNS_ResolverHandle *rh;
 559   struct GNUNET_TIME_Relative remaining_time;
 560   GNUNET_HashCode zone;
 561
 562   rh = (struct GNUNET_GNS_ResolverHandle *)cls;
 563   GNUNET_CRYPTO_hash(key,
 564                      sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
 565                      &zone);
 566   remaining_time = GNUNET_TIME_absolute_get_remaining (expiration);
 567
 568   /**
 569    * No authority found in namestore.
 570    */
 571   if (rd_count == 0)
 572   {
 573     /**
 574      * We did not find an authority in the namestore
 575      * _IF_ the current authoritative zone is us we cannot resolve
 576      * _ELSE_ we can still check the _expired_ dht
 577      */
 578     if (0 != GNUNET_CRYPTO_hash_cmp(&zone, &zone_hash) &&
 579         (remaining_time.rel_value == 0))
 580     {
 581       resolve_authority_dht(rh);
 582       return;
 583     }
 584     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Authority %s unknown\n",
 585                rh->authority_name);
 586     reply_to_dns(rh, 0, NULL);
 587     return;
 588   }
 589
 590   //Note only 1 pkey should have been returned.. anything else would be strange
 591   /**
 592    * We found an authority that may be able to help us
 593    * move on with query
 594    */
 595   int i;
 596   for (i=0; i<rd_count;i++)
 597   {
 598
 599     if (rd[i].record_type != GNUNET_GNS_RECORD_PKEY)
 600       continue;
 601
 602       if ((GNUNET_TIME_absolute_get_remaining (rd[i].expiration)).rel_value
 603           == 0)
 604       {
 605         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "This pkey is expired.\n");
 606         if (remaining_time.rel_value == 0)
 607         {
 608           GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 609                      "This dht entry is expired. Refreshing\n");
 610           resolve_authority_dht(rh);
 611         }
 612
 613         continue;
 614       }
 615
 616       /**
 617        * Resolve rest of query with new authority
 618        */
 619       GNUNET_assert(rd[i].record_type == GNUNET_GNS_RECORD_PKEY);
 620       GNUNET_CRYPTO_hash(rd[i].data,
 621                          sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
 622                          &rh->authority);
 623       resolve_name(rh);
 624       return;
 625
 626   }
 627
 628   /**
 629    * no answers found
 630    */
 631   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 632              "Authority lookup successful but no PKEY... never get here\n");
 633   reply_to_dns(rh, 0, NULL);
 634 }
 635
 636
 637 /**
 638  * Reply to client with the result from our lookup.
 639  *
 640  * @param rh the request handle of the lookup
 641  * @param rd_count the number of records to return
 642  * @param rd the record data
 643  */
 644 static void
 645 reply_to_dns(struct GNUNET_GNS_ResolverHandle *rh, uint32_t rd_count,
 646              const struct GNUNET_NAMESTORE_RecordData *rd)
 647 {
 648   int i;
 649   size_t len;
 650   int ret;
 651   char *buf;
 652   struct GNUNET_DNSPARSER_Packet *packet = rh->packet;
 653   struct GNUNET_DNSPARSER_Record answer_records[rh->answered];
 654   struct GNUNET_DNSPARSER_Record additional_records[rd_count-(rh->answered)];
 655   packet->answers = answer_records;
 656   packet->additional_records = additional_records;
 657
 658   /**
 659    * Put records in the DNS packet and modify it
 660    * to a response
 661    */
 662   len = sizeof(struct GNUNET_DNSPARSER_Record*);
 663   for (i=0; i < rd_count; i++)
 664   {
 665
 666     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 667                "Adding type %d to DNS response\n", rd[i].record_type);
 668     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Name: %s\n", rh->name);
 669     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "QName: %s\n", rh->query->name);
 670     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Record %d/%d\n", i+1, rd_count);
 671     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Record len %d\n", rd[i].data_size);
 672
 673     if (rd[i].record_type == rh->query->type)
 674     {
 675       answer_records[i].name = rh->query->name;
 676       answer_records[i].type = rd[i].record_type;
 677       answer_records[i].data.raw.data_len = rd[i].data_size;
 678       answer_records[i].data.raw.data = (char*)rd[i].data;
 679       answer_records[i].expiration_time = rd[i].expiration;
 680       answer_records[i].class = GNUNET_DNSPARSER_CLASS_INTERNET;//hmmn
 681     }
 682     else
 683     {
 684       additional_records[i].name = rh->query->name;
 685       additional_records[i].type = rd[i].record_type;
 686       additional_records[i].data.raw.data_len = rd[i].data_size;
 687       additional_records[i].data.raw.data = (char*)rd[i].data;
 688       additional_records[i].expiration_time = rd[i].expiration;
 689       additional_records[i].class = GNUNET_DNSPARSER_CLASS_INTERNET;//hmmn
 690     }
 691   }
 692
 693   packet->num_answers = rh->answered;
 694   packet->num_additional_records = rd_count-(rh->answered);
 695
 696   if (0 == GNUNET_CRYPTO_hash_cmp(&rh->authority, &zone_hash))
 697     packet->flags.authoritative_answer = 1;
 698   else
 699     packet->flags.authoritative_answer = 0;
 700
 701   if (rd == NULL)
 702     packet->flags.return_code = GNUNET_DNSPARSER_RETURN_CODE_NAME_ERROR;
 703   else
 704     packet->flags.return_code = GNUNET_DNSPARSER_RETURN_CODE_NO_ERROR;
 705
 706   packet->flags.query_or_response = 1;
 707
 708
 709   /**
 710    * Reply to DNS
 711    */
 712   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 713              "Building DNS response\n");
 714   ret = GNUNET_DNSPARSER_pack (packet,
 715                                1024, /* FIXME magic from dns redirector */
 716                                &buf,
 717                                &len);
 718   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 719              "Built DNS response! (ret=%d,len=%d)\n", ret, len);
 720   if (ret == GNUNET_OK)
 721   {
 722     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 723                "Answering DNS request\n");
 724     GNUNET_DNS_request_answer(rh->request_handle,
 725                               len,
 726                               buf);
 727     //GNUNET_free(answer);
 728     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Answered DNS request\n");
 729   }
 730   else
 731   {
 732     GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
 733                "Error building DNS response! (ret=%d)", ret);
 734   }
 735
 736   GNUNET_free(rh->name);
 737   GNUNET_free(rh);
 738 }
 739
 740
 741 /**
 742  * Namestore calls this function if we have record for this name.
 743  * (or with rd_count=0 to indicate no matches)
 744  *
 745  * @param cls the pending query
 746  * @param key the key of the zone we did the lookup
 747  * @param expiration expiration date of the namestore entry
 748  * @param name the name for which we need an authority
 749  * @param rd_count the number of records with 'name'
 750  * @param rd the record data
 751  * @param signature the signature of the authority for the record data
 752  */
 753 static void
 754 process_authoritative_result(void* cls,
 755                   const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
 756                   struct GNUNET_TIME_Absolute expiration,
 757                   const char *name, unsigned int rd_count,
 758                   const struct GNUNET_NAMESTORE_RecordData *rd,
 759                   const struct GNUNET_CRYPTO_RsaSignature *signature)
 760 {
 761   struct GNUNET_GNS_ResolverHandle *rh;
 762   struct GNUNET_TIME_Relative remaining_time;
 763   GNUNET_HashCode zone;
 764
 765   rh = (struct GNUNET_GNS_ResolverHandle *) cls;
 766   GNUNET_CRYPTO_hash(key,
 767                      sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
 768                      &zone);
 769   remaining_time = GNUNET_TIME_absolute_get_remaining (expiration);
 770
 771   if (rd_count == 0)
 772   {
 773     /**
 774      * Lookup terminated and no results
 775      * -> DHT Phase unless data is recent
 776      */
 777     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 778                "Namestore lookup for %s terminated without results\n", name);
 779
 780     /**
 781      * if this is not our zone we cannot rely on the namestore to be
 782      * complete. -> Query DHT
 783      */
 784     if (GNUNET_CRYPTO_hash_cmp(&zone, &zone_hash))
 785     {
 786       if (remaining_time.rel_value == 0)
 787       {
 788         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 789                    "trying dht...\n");
 790         resolve_name_dht(rh, name);
 791         return;
 792       }
 793       else
 794       {
 795         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 796                    "Record is still recent. No DHT lookup\n");
 797       }
 798     }
 799
 800     /**
 801      * Our zone and no result? Cannot resolve TT
 802      */
 803     GNUNET_assert(rh->answered == 0);
 804     reply_to_dns(rh, 0, NULL);
 805     return;
 806
 807   }
 808   else
 809   {
 810
 811     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 812                "Processing additional result %s from namestore\n", name);
 813     int i;
 814     for (i=0; i<rd_count;i++)
 815     {
 816
 817       if ((strcmp(name, rh->query->name) == 0)
 818           && (rd[i].record_type != rh->query->type))
 819         continue;
 820
 821       if ((GNUNET_TIME_absolute_get_remaining (rd[i].expiration)).rel_value
 822           == 0)
 823       {
 824         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "This record is expired. Skipping\n");
 825         continue;
 826       }
 827
 828       rh->answered++;
 829
 830     }
 831
 832     /**
 833      * no answers found
 834      * consult dht if expired
 835      */
 836     if ((remaining_time.rel_value == 0) && (rh->answered == 0))
 837     {
 838       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 839                  "This dht entry is old. Refreshing.\n");
 840       resolve_name_dht(rh, name);
 841       return;
 842     }
 843
 844     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Found %d answer(s) to query!\n",
 845                rh->answered);
 846
 847     reply_to_dns(rh, rd_count, rd);
 848   }
 849 }
 850
 851 /**
 852  * Determine if this name is canonical.
 853  * i.e.
 854  * a.b.gnunet  = not canonical
 855  * a           = canonical
 856  *
 857  * @param name the name to test
 858  * @return 1 if canonical
 859  */
 860 static int
 861 is_canonical(char* name)
 862 {
 863   uint32_t len = strlen(name);
 864   int i;
 865
 866   for (i=0; i<len; i++)
 867   {
 868     if (*(name+i) == '.')
 869       return 0;
 870   }
 871   return 1;
 872 }
 873
 874 /**
 875  * Move one level up in the domain hierarchy and return the
 876  * passed top level domain.
 877  *
 878  * @param name the domain
 879  * @return the tld
 880  */
 881 static char*
 882 pop_tld(char* name)
 883 {
 884   uint32_t len;
 885
 886   if (is_canonical(name))
 887     return NULL;
 888
 889   for (len = strlen(name); len > 0; len--)
 890   {
 891     if (*(name+len) == '.')
 892       break;
 893   }
 894
 895   if (len == 0)
 896     return NULL;
 897
 898   name[len] = '\0';
 899
 900   return (name+len+1);
 901 }
 902
 903
 904 /**
 905  * The first phase of resolution.
 906  * First check if the name is canonical.
 907  * If it is then try to resolve directly.
 908  * If not then we first have to resolve the authoritative entities.
 909  *
 910  * @param rh the pending lookup
 911  */
 912 static void
 913 resolve_name(struct GNUNET_GNS_ResolverHandle *rh)
 914 {
 915   if (is_canonical(rh->name))
 916   {
 917     /* We only need to check the current zone's ns */
 918     GNUNET_NAMESTORE_lookup_record(namestore_handle,
 919                                &rh->authority,
 920                                rh->name,
 921                                rh->query->type,
 922                                &process_authoritative_result,
 923                                rh);
 924   }
 925   else
 926   {
 927     /* We have to resolve the authoritative entity first */
 928     rh->authority_name = pop_tld(rh->name);
 929     GNUNET_NAMESTORE_lookup_record(namestore_handle,
 930                                  &rh->authority,
 931                                  rh->authority_name,
 932                                  GNUNET_GNS_RECORD_PKEY,
 933                                  &process_authority_lookup,
 934                                  rh);
 935   }
 936 }
 937
 938 /**
 939  * Entry point for name resolution
 940  * Setup a new query and try to resolve
 941  *
 942  * @param request the request handle of the DNS request from a client
 943  * @param p the DNS query packet we received
 944  * @param q the DNS query we received parsed from p
 945  */
 946 static void
 947 start_resolution(struct GNUNET_DNS_RequestHandle *request,
 948                  struct GNUNET_DNSPARSER_Packet *p,
 949                  struct GNUNET_DNSPARSER_Query *q)
 950 {
 951   struct GNUNET_GNS_ResolverHandle *rh;
 952
 953   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Starting resolution for (%s)!\n",
 954               q->name);
 955
 956   rh = GNUNET_malloc(sizeof (struct GNUNET_GNS_ResolverHandle));
 957   rh->packet = p;
 958   rh->query = q;
 959   rh->authority = zone_hash;
 960
 961   rh->name = GNUNET_malloc(strlen(q->name)
 962                               - strlen(gnunet_tld) + 1);
 963   memset(rh->name, 0,
 964          strlen(q->name)-strlen(gnunet_tld) + 1);
 965   memcpy(rh->name, q->name,
 966          strlen(q->name)-strlen(gnunet_tld));
 967
 968   rh->request_handle = request;
 969
 970   /* Start resolution in our zone */
 971   resolve_name(rh);
 972 }
 973
 974 /**
 975  * The DNS request handler
 976  * Called for every incoming DNS request.
 977  *
 978  * @param cls closure
 979  * @param rh request handle to user for reply
 980  * @param request_length number of bytes in request
 981  * @param request udp payload of the DNS request
 982  */
 983 static void
 984 handle_dns_request(void *cls,
 985                    struct GNUNET_DNS_RequestHandle *rh,
 986                    size_t request_length,
 987                    const char *request)
 988 {
 989   struct GNUNET_DNSPARSER_Packet *p;
 990   char *tldoffset;
 991
 992   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Hijacked a DNS request...processing\n");
 993   p = GNUNET_DNSPARSER_parse (request, request_length);
 994
 995   if (NULL == p)
 996   {
 997     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
 998                 "Received malformed DNS packet, leaving it untouched\n");
 999     GNUNET_DNS_request_forward (rh);
1000     return;
1001   }
1002
1003   /**
1004    * Check tld and decide if we or
1005    * legacy dns is responsible
1006    *
1007    * FIXME now in theory there could be more than 1 query in the request
1008    * but if this is case we get into trouble:
1009    * either we query the GNS or the DNS. We cannot do both!
1010    * So I suggest to either only allow a single query per request or
1011    * only allow GNS or DNS requests.
1012    * The way it is implemented here now is buggy and will lead to erratic
1013    * behaviour (if multiple queries are present).
1014    */
1015   if (p->num_queries == 0)
1016   {
1017     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1018                 "No Queries in DNS packet... forwarding\n");
1019     GNUNET_DNS_request_forward (rh);
1020   }
1021
1022   if (p->num_queries > 1)
1023   {
1024     /* Note: We could also look for .gnunet */
1025     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1026                 ">1 queriy in DNS packet... odd. We only process #1\n");
1027   }
1028
1029
1030   /**
1031    * Check for .gnunet
1032    */
1033   tldoffset = p->queries[0].name + strlen(p->queries[0].name);
1034
1035   while ((*tldoffset) != '.')
1036     tldoffset--;
1037
1038   if (0 == strcmp(tldoffset, gnunet_tld))
1039   {
1040     start_resolution(rh, p, p->queries);
1041   }
1042   else
1043   {
1044     /**
1045      * This request does not concern us. Forward to real DNS.
1046      */
1047     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1048                "Request for %s is forwarded to DNS\n", p->queries[0].name);
1049     GNUNET_DNS_request_forward (rh);
1050   }
1051
1052 }
1053
1054 /**
1055  * test function that stores some data in the namestore
1056  * This will also be replaced by a test progrm that
1057  * directl interfaces with the namestore
1058  */
1059 static void
1060 put_some_records(void)
1061 {
1062   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Populating namestore\n");
1063   /* put an A record into namestore FIXME use gnunet.org */
1064   char* ipB = "5.6.7.8";
1065
1066   struct in_addr *web = GNUNET_malloc(sizeof(struct in_addr));
1067   struct GNUNET_NAMESTORE_RecordData rdb_web;
1068
1069   GNUNET_assert(1 == inet_pton (AF_INET, ipB, web));
1070
1071   rdb_web.data_size = sizeof(struct in_addr);
1072   rdb_web.data = web;
1073   rdb_web.record_type = GNUNET_DNSPARSER_TYPE_A;
1074   rdb_web.expiration = GNUNET_TIME_absolute_get_forever ();
1075
1076   GNUNET_NAMESTORE_record_create (namestore_handle,
1077                                   zone_key,
1078                                   "www",
1079                                   &rdb_web,
1080                                   NULL,
1081                                   NULL);
1082 }
1083
1084 /**
1085  * Method called periodicattluy that triggers
1086  * iteration over root zone
1087  *
1088  * @param cls closure
1089  * @param tc task context
1090  */
1091 static void
1092 update_zone_dht_next(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1093 {
1094   GNUNET_NAMESTORE_zone_iterator_next(namestore_iter);
1095 }
1096
1097 /**
1098  * Continuation for DHT put
1099  *
1100  * @param cls closure
1101  * @param tc task context
1102  */
1103 static void
1104 record_dht_put(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1105 {
1106   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "put request transmitted\n");
1107 }
1108
1109 /* prototype */
1110 static void
1111 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1112
1113 /**
1114  * Function used to put all records successively into the DHT.
1115  *
1116  * @param cls the closure (NULL)
1117  * @param key the public key of the authority (ours)
1118  * @param expiration lifetime of the namestore entry
1119  * @param name the name of the records
1120  * @param rd_count the number of records in data
1121  * @param rd the record data
1122  * @param signature the signature for the record data
1123  */
1124 static void
1125 put_gns_record(void *cls,
1126                 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
1127                 struct GNUNET_TIME_Absolute expiration,
1128                 const char *name,
1129                 unsigned int rd_count,
1130                 const struct GNUNET_NAMESTORE_RecordData *rd,
1131                 const struct GNUNET_CRYPTO_RsaSignature *signature)
1132 {
1133
1134   struct GNSNameRecordBlock *nrb;
1135   GNUNET_HashCode name_hash;
1136   GNUNET_HashCode xor_hash;
1137   struct GNUNET_CRYPTO_HashAsciiEncoded xor_hash_string;
1138   uint32_t rd_payload_length;
1139   char* nrb_data = NULL;
1140
1141   /* we're done */
1142   if (NULL == name)
1143   {
1144     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Zone iteration finished\n");
1145     GNUNET_NAMESTORE_zone_iteration_stop (namestore_iter);
1146     zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_start,
1147                                                    NULL);
1148     return;
1149   }
1150
1151   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1152              "Putting records for %s into the DHT\n", name);
1153
1154   rd_payload_length = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
1155
1156   nrb = GNUNET_malloc(rd_payload_length + strlen(name) + 1
1157                       + sizeof(struct GNSNameRecordBlock));
1158
1159   if (signature != NULL)
1160     nrb->signature = *signature;
1161
1162   nrb->public_key = *key;
1163
1164   nrb->rd_count = htonl(rd_count);
1165
1166   memset(&nrb[1], 0, strlen(name) + 1);
1167   memcpy(&nrb[1], name, strlen(name));
1168
1169   nrb_data = (char*)&nrb[1];
1170   nrb_data += strlen(name) + 1;
1171
1172   if (-1 == GNUNET_NAMESTORE_records_serialize (rd_count,
1173                                                 rd,
1174                                                 rd_payload_length,
1175                                                 nrb_data))
1176   {
1177     GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Recor serialization failed!\n");
1178   }
1179
1180
1181   /*
1182    * calculate DHT key: H(name) xor H(pubkey)
1183    */
1184   GNUNET_CRYPTO_hash(name, strlen(name), &name_hash);
1185   GNUNET_CRYPTO_hash_xor(&zone_hash, &name_hash, &xor_hash);
1186   GNUNET_CRYPTO_hash_to_enc (&xor_hash, &xor_hash_string);
1187   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1188              "putting records for %s under key: %s with size %d\n",
1189              name, (char*)&xor_hash_string, rd_payload_length);
1190
1191   GNUNET_DHT_put (dht_handle, &xor_hash,
1192                   DHT_GNS_REPLICATION_LEVEL,
1193                   GNUNET_DHT_RO_NONE,
1194                   GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
1195                   rd_payload_length,
1196                   (char*)nrb,
1197                   expiration,
1198                   DHT_OPERATION_TIMEOUT,
1199                   &record_dht_put,
1200                   NULL); //cls for cont
1201
1202   num_public_records++;
1203
1204   /**
1205    * Reschedule periodic put
1206    */
1207   zone_update_taskid = GNUNET_SCHEDULER_add_delayed (dht_update_interval,
1208                                 &update_zone_dht_next,
1209                                 NULL);
1210
1211 }
1212
1213 /**
1214  * Puts a single trusted entity into the
1215  * namestore. Will be replaced in a testcase
1216  * that directly interacts with a persistent
1217  * namestore.
1218  *
1219  * @param name name of entity
1220  * @param keyfile keyfile
1221  */
1222 static void
1223 put_trusted(char* name, char* keyfile)
1224 {
1225   struct GNUNET_NAMESTORE_RecordData rd;
1226   struct GNUNET_CRYPTO_RsaPrivateKey *key;
1227   struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey;
1228   pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
1229
1230   key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
1231   GNUNET_CRYPTO_rsa_key_get_public (key, pkey);
1232   rd.data = pkey;
1233   rd.expiration = GNUNET_TIME_absolute_get_forever ();
1234   rd.data_size = sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded);
1235   rd.record_type = GNUNET_GNS_RECORD_PKEY;
1236
1237   GNUNET_NAMESTORE_record_create (namestore_handle,
1238                                   zone_key,
1239                                   name,
1240                                   &rd,
1241                                   NULL,
1242                                   NULL);
1243 }
1244
1245
1246
1247 /**
1248  * Periodically iterate over our zone and store everything in dht
1249  *
1250  * @param cls NULL
1251  * @param tc task context
1252  */
1253 static void
1254 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1255 {
1256   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Starting DHT zone update!\n");
1257   if (0 == num_public_records)
1258   {
1259     dht_update_interval = GNUNET_TIME_relative_multiply(
1260                                                       GNUNET_TIME_UNIT_SECONDS,
1261                                                       1);
1262   }
1263   else
1264   {
1265     dht_update_interval = GNUNET_TIME_relative_multiply(
1266                                                       GNUNET_TIME_UNIT_SECONDS,
1267                                                      (3600/num_public_records));
1268   }
1269   num_public_records = 0; //start counting again
1270   namestore_iter = GNUNET_NAMESTORE_zone_iteration_start (namestore_handle,
1271                                                           &zone_hash,
1272                                                           GNUNET_NAMESTORE_RF_AUTHORITY,
1273                                                           GNUNET_NAMESTORE_RF_PRIVATE,
1274                                                           &put_gns_record,
1275                                                           NULL);
1276 }
1277
1278 /**
1279  * Process GNS requests.
1280  *
1281  * @param cls closure
1282  * @param server the initialized server
1283  * @param c configuration to use
1284  */
1285 static void
1286 run (void *cls, struct GNUNET_SERVER_Handle *server,
1287      const struct GNUNET_CONFIGURATION_Handle *c)
1288 {
1289
1290   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Initializing GNS\n");
1291
1292   char* keyfile;
1293   char* trusted_entities;
1294   struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
1295
1296   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (c, "gns",
1297                                              "ZONEKEY", &keyfile))
1298   {
1299     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1300                 "No private key for root zone specified%s!\n", keyfile);
1301     GNUNET_SCHEDULER_shutdown(0);
1302     return;
1303   }
1304
1305   zone_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
1306   GNUNET_CRYPTO_rsa_key_get_public (zone_key, &pkey);
1307
1308   GNUNET_CRYPTO_hash(&pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1309                      &zone_hash);
1310
1311   nc = GNUNET_SERVER_notification_context_create (server, 1);
1312
1313   GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
1314                                 NULL);
1315
1316   if (GNUNET_YES ==
1317       GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
1318                                             "HIJACK_DNS"))
1319   {
1320     GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1321                "DNS hijacking enabled... connecting to service.\n");
1322     /**
1323      * Do gnunet dns init here
1324      */
1325     dns_handle = GNUNET_DNS_connect(c,
1326                                     GNUNET_DNS_FLAG_PRE_RESOLUTION,
1327                                     &handle_dns_request, /* rh */
1328                                     NULL); /* Closure */
1329     if (NULL == dns_handle)
1330     {
1331       GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1332                "Failed to connect to the dnsservice!\n");
1333     }
1334   }
1335
1336
1337
1338   /**
1339    * handle to our local namestore
1340    */
1341   namestore_handle = GNUNET_NAMESTORE_connect(c);
1342
1343   if (NULL == namestore_handle)
1344   {
1345     //FIXME do error handling;
1346     GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
1347                "Failed to connect to the namestore!\n");
1348     GNUNET_SCHEDULER_shutdown(0);
1349     return;
1350   }
1351
1352   char* trusted_start;
1353   char* trusted_name;
1354   char *trusted_key;
1355   int trusted_len;
1356   if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_string (c, "gns",
1357                                                       "TRUSTED",
1358                                                       &trusted_entities))
1359   {
1360     trusted_start = trusted_entities;
1361     trusted_len = strlen(trusted_entities);
1362     GNUNET_log(GNUNET_ERROR_TYPE_INFO,
1363                "Found trusted entities in config file, importing\n");
1364     while ((trusted_entities-trusted_start) < trusted_len)
1365     {
1366       trusted_name = trusted_entities;
1367       while (*trusted_entities != ':')
1368         trusted_entities++;
1369       *trusted_entities = '\0';
1370       trusted_entities++;
1371       trusted_key = trusted_entities;
1372       while (*trusted_entities != ',' && (*trusted_entities != '\0'))
1373         trusted_entities++;
1374       *trusted_entities = '\0';
1375       trusted_entities++;
1376
1377       if (GNUNET_YES == GNUNET_DISK_file_test (trusted_key))
1378       {
1379         GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Adding %s:%s to root zone\n",
1380                  trusted_name,
1381                  trusted_key);
1382         put_trusted(trusted_name, trusted_key);
1383       }
1384       else
1385       {
1386         GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Keyfile %s does not exist!\n",
1387                    trusted_key);
1388         //put_trusted(trusted_name, trusted_key); //FIXME for testing
1389       }
1390     }
1391
1392   }
1393
1394   /**
1395    * handle to the dht
1396    */
1397   dht_handle = GNUNET_DHT_connect(c, 1); //FIXME get ht_len from cfg
1398
1399   if (NULL == dht_handle)
1400   {
1401     GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Could not connect to DHT!\n");
1402   }
1403
1404   put_some_records(); //FIXME for testing
1405
1406   /**
1407    * Schedule periodic put
1408    * for our records
1409    * We have roughly an hour for all records;
1410    */
1411   dht_update_interval = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS,
1412                                                       1);
1413   zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_start, NULL);
1414
1415 }
1416
1417
1418 /**
1419  * The main function for the GNS service.
1420  *
1421  * @param argc number of arguments from the command line
1422  * @param argv command line arguments
1423  * @return 0 ok, 1 on error
1424  */
1425 int
1426 main (int argc, char *const *argv)
1427 {
1428   int ret;
1429
1430   ret =
1431       (GNUNET_OK ==
1432        GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
1433                            NULL)) ? 0 : 1;
1434   return ret;
1435 }
1436
1437 /* end of gnunet-service-gns.c */