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  * @file gns/gnunet-service-gns.c
  23  * @brief GNUnet GNS service
  24  * @author Martin Schanzenbach
  25  */
  26 #include "platform.h"
  27 #include "gnunet_util_lib.h"
  28 #include "gnunet_transport_service.h"
  29 #include "gnunet_dns_service.h"
  30 #include "gnunet_dnsparser_lib.h"
  31 #include "gnunet_dht_service.h"
  32 #include "gnunet_namestore_service.h"
  33 #include "gnunet_gns_service.h"
  34 #include "gns.h"
  35
  36
  37 /* TODO into gnunet_protocols */
  38 #define GNUNET_MESSAGE_TYPE_GNS_CLIENT_LOOKUP 23
  39 #define GNUNET_MESSAGE_TYPE_GNS_CLIENT_RESULT 24
  40
  41 struct GNUNET_GNS_QueryRecordList
  42 {
  43   /**
  44    * DLL
  45    */
  46   struct GNUNET_GNS_QueryRecordList * next;
  47   struct GNUNET_GNS_QueryRecordList * prev;
  48
  49   struct GNUNET_DNSPARSER_Record * record;
  50 };
  51
  52 /**
  53  * A result list for namestore queries
  54  */
  55 struct GNUNET_GNS_PendingQuery
  56 {
  57   /* the answer packet */
  58   struct GNUNET_DNSPARSER_Packet *answer;
  59
  60   /* records to put into answer packet */
  61   struct GNUNET_GNS_QueryRecordList * records_head;
  62   struct GNUNET_GNS_QueryRecordList * records_tail;
  63
  64   int num_records;
  65   int num_authority_records; //FIXME are all of our replies auth?
  66
  67   char *name;
  68   uint16_t type;
  69   /* the dns request id */
  70   int id; // FIXME can handle->request_id also be used here?
  71
  72   /* the request handle to reply to */
  73   struct GNUNET_DNS_RequestHandle *request_handle;
  74
  75   /* hast this query been answered? */
  76   int answered;
  77
  78   /* we have an authority in namestore that
  79    * may be able to resolve
  80    */
  81   int authority_found;
  82 };
  83
  84
  85 /**
  86  * Our handle to the DNS handler library
  87  */
  88 struct GNUNET_DNS_Handle *dns_handle;
  89
  90 /**
  91  * Our handle to the DHT
  92  */
  93 struct GNUNET_DHT_Handle *dht_handle;
  94
  95 struct GNUNET_TIME_Relative dht_update_interval;
  96
  97 /**
  98  * Our private "key"
  99  * FIXME get the real deal
 100  */
 101 struct GNUNET_CRYPTO_RsaPrivateKey *zone_key;
 102
 103 /**
 104  * Our handle to the namestore service
 105  */
 106 struct GNUNET_NAMESTORE_Handle *namestore_handle;
 107
 108 /**
 109  * The configuration the GNS service is running with
 110  */
 111 const struct GNUNET_CONFIGURATION_Handle *GNS_cfg;
 112
 113 /**
 114  * Our notification context.
 115  */
 116 static struct GNUNET_SERVER_NotificationContext *nc;
 117
 118 /**
 119  * Our zone hash
 120  */
 121 GNUNET_HashCode *zone_hash;
 122
 123 /**
 124  * Task run during shutdown.
 125  *
 126  * @param cls unused
 127  * @param tc unused
 128  */
 129 static void
 130 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 131 {
 132   GNUNET_DNS_disconnect(dns_handle);
 133   GNUNET_NAMESTORE_disconnect(namestore_handle, 0);
 134   GNUNET_DHT_disconnect(dht_handle);
 135 }
 136
 137 void
 138 handle_dht_reply(void* cls,
 139                  struct GNUNET_TIME_Absolute exp,
 140                  const GNUNET_HashCode * key,
 141                  const struct GNUNET_PeerIdentity *get_path,
 142                  unsigned int get_path_length,
 143                  const struct GNUNET_PeerIdentity *put_path,
 144                  unsigned int put_path_length,
 145                  enum GNUNET_BLOCK_Type type,
 146                  size_t size, const void *data)
 147 {
 148 }
 149
 150 void
 151 process_auth_query(void* cls, const GNUNET_HashCode *zone,
 152                    const char *name, uint32_t record_type,
 153                    struct GNUNET_TIME_Absolute expiration,
 154                    enum GNUNET_NAMESTORE_RecordFlags flags,
 155                    const struct GNUNET_NAMESTORE_SignatureLocation *sig_loc,
 156                    size_t size, const void *data)
 157 {
 158   struct GNUNET_GNS_PendingQuery *query;
 159
 160   query = (struct GNUNET_GNS_PendingQuery *)cls;
 161
 162   /**
 163    * No authority found
 164    * FIXME We assume this will never return our authority
 165    */
 166   if ((NULL == data) && !query->authority_found)
 167   {
 168     GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Find authority\n");
 169     if (0 == strcmp(name, "gnunet"))
 170     {
 171       // Reached tld return nx
 172       GNUNET_log(GNUNET_ERROR_TYPE_INFO, "NX record\n");
 173       return;
 174     }
 175
 176     //Move name to next level
 177     while ((*name) != '.')
 178       name++;
 179
 180     name++;
 181     GNUNET_NAMESTORE_lookup_name(namestore_handle,
 182                                  zone_hash,
 183                                  name,
 184                                  GNUNET_GNS_RECORD_PKEY,
 185                                  &process_auth_query,
 186                                  query);
 187     return;
 188   }
 189
 190   /**
 191    * We found a PKEY that may be able to help us
 192    */
 193   GNUNET_HashCode *key = (GNUNET_HashCode*) data;
 194
 195   //FIXME magic number
 196   struct GNUNET_TIME_Relative timeout =
 197     GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 20);
 198   GNUNET_DHT_get_start (dht_handle,
 199                         timeout,
 200                         GNUNET_BLOCK_TYPE_TEST, //TODO our plugin
 201                         key,
 202                         5, //replication
 203                         GNUNET_DHT_RO_NONE,
 204                         query->name, //xquery FIXME nobody will know this name
 205                         strlen(query->name),
 206                         &handle_dht_reply,
 207                         query); //iter cls
 208
 209
 210 }
 211
 212
 213 /**
 214  * Phase 2 of resolution.
 215  */
 216 void
 217 lookup_dht(struct GNUNET_GNS_PendingQuery *query)
 218 {
 219   /**
 220    * In this phase we first want to find the
 221    * responsible authority in the namestore
 222    */
 223   GNUNET_NAMESTORE_lookup_name(namestore_handle,
 224                                zone_hash,
 225                                query->name,
 226                                GNUNET_GNS_RECORD_PKEY,
 227                                &process_auth_query,
 228                                query);
 229 }
 230
 231 void
 232 reply_to_dns(struct GNUNET_GNS_PendingQuery *answer)
 233 {
 234   struct GNUNET_GNS_QueryRecordList *i;
 235   struct GNUNET_DNSPARSER_Packet *packet;
 236   struct GNUNET_DNSPARSER_Flags dnsflags;
 237   int j;
 238   size_t len;
 239   int ret;
 240   char *buf;
 241
 242   packet = GNUNET_malloc(sizeof(struct GNUNET_DNSPARSER_Packet));
 243   packet->answers =
 244     GNUNET_malloc(sizeof(struct GNUNET_DNSPARSER_Record) * answer->num_records);
 245
 246   len = sizeof(struct GNUNET_DNSPARSER_Record*);
 247   j = 0;
 248   for (i=answer->records_head; i != NULL; i=i->next)
 249   {
 250     GNUNET_log(GNUNET_ERROR_TYPE_INFO,
 251                "Adding %s to DNS response\n", i->record->name);
 252     memcpy(&packet->answers[j],
 253            i->record,
 254            sizeof (struct GNUNET_DNSPARSER_Record));
 255     GNUNET_free(i->record);
 256     j++;
 257   }
 258   GNUNET_log(GNUNET_ERROR_TYPE_INFO, "after memcpy\n");
 259   /* FIXME how to handle auth, additional etc */
 260   packet->num_answers = answer->num_records;
 261   packet->num_authority_records = answer->num_authority_records;
 262
 263   dnsflags.authoritative_answer = 1;
 264   dnsflags.opcode = GNUNET_DNSPARSER_OPCODE_QUERY;
 265   dnsflags.return_code = GNUNET_DNSPARSER_RETURN_CODE_NO_ERROR; //not sure
 266   dnsflags.query_or_response = 1;
 267   packet->flags = dnsflags;
 268
 269   packet->id = answer->id;
 270   ret = GNUNET_DNSPARSER_pack (packet,
 271                                1024, /* FIXME magic from dns redirector */
 272                                &buf,
 273                                &len);
 274   GNUNET_log(GNUNET_ERROR_TYPE_INFO,
 275              "Built DNS response! (ret=%d)\n", ret);
 276   if (ret == GNUNET_OK)
 277   {
 278     GNUNET_log(GNUNET_ERROR_TYPE_INFO,
 279                "Answering DNS request\n");
 280     GNUNET_DNS_request_answer(answer->request_handle,
 281                               len,
 282                               buf);
 283     GNUNET_free(answer);
 284     GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Answered DNS request\n");
 285     //FIXME return code, free datastructures
 286   }
 287   else
 288   {
 289     GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
 290                "Error building DNS response! (ret=%d)", ret);
 291   }
 292 }
 293
 294 static void
 295 process_ns_result(void* cls, const GNUNET_HashCode *zone,
 296                   const char *name, uint32_t record_type,
 297                   struct GNUNET_TIME_Absolute expiration,
 298                   enum GNUNET_NAMESTORE_RecordFlags flags,
 299                   const struct GNUNET_NAMESTORE_SignatureLocation *sig_loc,
 300                   size_t size, const void *data)
 301 {
 302   struct GNUNET_GNS_PendingQuery *query;
 303   struct GNUNET_GNS_QueryRecordList *qrecord;
 304   struct GNUNET_DNSPARSER_Record *record;
 305   query = (struct GNUNET_GNS_PendingQuery *) cls;
 306
 307
 308   if (NULL == data)
 309   {
 310     /**
 311      * Last result received (or none)
 312      * Do we have what we need to answer?
 313      * If not -> DHT Phase
 314      * FIXME free memory
 315      */
 316     GNUNET_log(GNUNET_ERROR_TYPE_INFO,
 317                "Namestore lookup terminated. (answered=%d)", query->answered);
 318
 319     if (query->answered)
 320       reply_to_dns(query);
 321     else
 322       lookup_dht(query); //TODO
 323
 324   }
 325   else
 326   {
 327     /**
 328      * New result
 329      */
 330     GNUNET_log(GNUNET_ERROR_TYPE_INFO,
 331                "Processing additional result %s from namestore\n", name);
 332
 333     qrecord = GNUNET_malloc(sizeof(struct GNUNET_GNS_QueryRecordList));
 334     record = GNUNET_malloc(sizeof(struct GNUNET_DNSPARSER_Record));
 335     qrecord->record = record;
 336
 337     record->name = (char*)name;
 338     /* FIXME for gns records this requires the dnsparser to be modified!
 339      * or use RAW
 340      * maybe store record data appropriately in namestore to avoid this
 341      * huge switch?
 342      **/
 343     if (record_type == GNUNET_DNSPARSER_TYPE_A)
 344     {
 345       record->data.raw.data = (char*)data;
 346       record->data.raw.data_len = size;
 347     }
 348     record->expiration_time = expiration;
 349     record->type = record_type;
 350     record->class = GNUNET_DNSPARSER_CLASS_INTERNET; /* srsly? */
 351
 352     if (flags == GNUNET_NAMESTORE_RF_AUTHORITY)
 353     {
 354       //query->num_authority_records++;
 355     }
 356
 357     if ((0 == strcmp(query->name , name)) &&
 358         (query->type == record_type))
 359     {
 360       GNUNET_log(GNUNET_ERROR_TYPE_INFO, "Found answer to query!\n");
 361       query->answered = 1;
 362     }
 363
 364     query->num_records++;
 365
 366     //FIXME watch for leaks
 367     GNUNET_CONTAINER_DLL_insert(query->records_head,
 368                                 query->records_tail,
 369                                 qrecord);
 370   }
 371 }
 372
 373
 374 /**
 375  * Phase 1 of name resolution: Lookup local namestore
 376  *
 377  * @param name the name to look up
 378  * @param id the id of the dns request (for the reply)
 379  * @param type the record type to look for
 380  */
 381 void
 382 lookup_namestore(struct GNUNET_DNS_RequestHandle *rh,
 383                  char* name, uint16_t id, uint16_t type)
 384 {
 385   struct GNUNET_GNS_PendingQuery *answer;
 386
 387   /**
 388    * Do db lookup here. Make dht lookup if necessary
 389    * FIXME for now only local lookups for our zone!
 390    */
 391   GNUNET_log (GNUNET_ERROR_TYPE_INFO, "This is .gnunet (%s)!\n", name);
 392   answer = GNUNET_malloc(sizeof (struct GNUNET_GNS_PendingQuery));
 393   answer->id = id;
 394   answer->name = name;
 395   answer->type =type;
 396   answer->request_handle = rh;
 397
 398   GNUNET_NAMESTORE_lookup_name(namestore_handle,
 399                                zone_hash,
 400                                name,
 401                                type,
 402                                &process_ns_result,
 403                                answer);
 404 }
 405
 406 /**
 407  * The DNS request handler
 408  *
 409  * @param cls closure
 410  * @param rh request handle to user for reply
 411  * @param request_length number of bytes in request
 412  * @param request udp payload of the DNS request
 413  */
 414 void
 415 handle_dns_request(void *cls,
 416                    struct GNUNET_DNS_RequestHandle *rh,
 417                    size_t request_length,
 418                    const char *request)
 419 {
 420   /**
 421    * parse request for tld
 422    */
 423   struct GNUNET_DNSPARSER_Packet *p;
 424   int namelen;
 425   int i;
 426   char *tail;
 427
 428   GNUNET_log (GNUNET_ERROR_TYPE_INFO, "hijacked a request...processing\n");
 429   p = GNUNET_DNSPARSER_parse (request, request_length);
 430
 431   if (NULL == p)
 432   {
 433     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
 434                 "Received malformed DNS packet, leaving it untouched\n");
 435     GNUNET_DNS_request_forward (rh);
 436     return;
 437   }
 438
 439   /**
 440    * Check tld and decide if we or
 441    * legacy dns is responsible
 442    */
 443   for (i=0;i<p->num_queries;i++)
 444   {
 445     namelen = strlen(p->queries[i].name);
 446
 447     if (namelen < 7) /* this can't be .gnunet */
 448       continue;
 449     /**
 450      * Move our tld/root to config file
 451      * Generate fake DNS reply that replaces .gnunet with .org for testing?
 452      */
 453     tail = p->queries[i].name+(namelen-7);
 454     if (0 == strcmp(tail, ".gnunet"))
 455     {
 456       /* FIXME we need to answer to ALL queries in ONE response...
 457        * What happens if some requests should be handled by us and
 458        * others by DNS?
 459        * Like this we only answer one...
 460        */
 461       lookup_namestore(rh, p->queries[i].name, p->id, p->queries[i].type);
 462     }
 463     else
 464     {
 465       /**
 466        * This request does not concern us. Forward to real DNS.
 467        */
 468       GNUNET_log(GNUNET_ERROR_TYPE_INFO,
 469                  "Request for %s is forwarded to DNS\n", p->queries[i].name);
 470       GNUNET_DNS_request_forward (rh);
 471     }
 472   }
 473 }
 474
 475 /*TODO*/
 476 static void
 477 handle_client_record_lookup(void *cls,
 478                             struct GNUNET_SERVER_Client *client,
 479                             const struct GNUNET_MessageHeader *message)
 480 {
 481 }
 482
 483 /**
 484  * test function
 485  */
 486 void
 487 put_some_records(void)
 488 {
 489   /* put a few records into namestore */
 490   char* ipA = "1.2.3.4";
 491   char* ipB = "5.6.7.8";
 492   struct in_addr *alice = GNUNET_malloc(sizeof(struct in_addr));
 493   struct in_addr *bob = GNUNET_malloc(sizeof(struct in_addr));
 494   GNUNET_assert(1 == inet_pton (AF_INET, ipA, alice));
 495   GNUNET_assert(1 == inet_pton (AF_INET, ipB, bob));
 496   GNUNET_NAMESTORE_record_put (namestore_handle,
 497                                zone_hash,
 498                                "alice.gnunet",
 499                                GNUNET_GNS_RECORD_TYPE_A,
 500                                GNUNET_TIME_absolute_get_forever(),
 501                                GNUNET_NAMESTORE_RF_AUTHORITY,
 502                                NULL, //sig loc
 503                                sizeof(struct in_addr),
 504                                alice,
 505                                NULL,
 506                                NULL);
 507   GNUNET_NAMESTORE_record_put (namestore_handle,
 508                                zone_hash,
 509                                "bob.gnunet",
 510                                GNUNET_GNS_RECORD_TYPE_A,
 511                                GNUNET_TIME_absolute_get_forever(),
 512                                GNUNET_NAMESTORE_RF_AUTHORITY,
 513                                NULL, //sig loc
 514                                sizeof(struct in_addr),
 515                                bob,
 516                                NULL,
 517                                NULL);
 518 }
 519
 520 //Prototype... needed in put function
 521 static void
 522 update_zone_dht(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
 523
 524 void
 525 put_gns_record(void *cls, const GNUNET_HashCode *zone, const char *name,
 526                uint32_t record_type, struct GNUNET_TIME_Absolute expiration,
 527                enum GNUNET_NAMESTORE_RecordFlags flags,
 528                const struct GNUNET_NAMESTORE_SignatureLocation *sig_loc,
 529                size_t size, const void *record_data)
 530 {
 531   struct GNUNET_TIME_Relative timeout;
 532
 533   char* data;
 534   char* data_ptr;
 535   struct GNUNET_TIME_AbsoluteNBO exp_nbo;
 536   exp_nbo = GNUNET_TIME_absolute_hton (expiration);
 537   uint32_t namelen = htonl(strlen(name));
 538   uint16_t flags_nbo = htons(flags);
 539   uint64_t offset = GNUNET_htonll(sig_loc->offset);
 540   uint32_t depth = htonl(sig_loc->depth);
 541   uint32_t revision = htonl(sig_loc->revision);
 542
 543   /**
 544    * I guess this can be done prettier
 545    */
 546   size_t record_len = sizeof(size_t) + sizeof(uint32_t) +
 547     sizeof(uint16_t) +
 548     sizeof(struct GNUNET_NAMESTORE_SignatureLocation) +
 549     sizeof(uint32_t) + strlen(name) + size;
 550
 551   record_type = htonl(record_type);
 552
 553   data = GNUNET_malloc(record_len);
 554
 555   /* -_- */
 556   data_ptr = data;
 557   memcpy(data_ptr, &namelen, sizeof(size_t));
 558   data_ptr += sizeof(size_t);
 559
 560   memcpy(data_ptr, name, namelen);
 561   data_ptr += namelen;
 562
 563   memcpy(data_ptr, &record_type, sizeof(uint32_t));
 564   data_ptr += sizeof(uint32_t);
 565
 566   memcpy(data_ptr, &exp_nbo, sizeof(struct GNUNET_TIME_AbsoluteNBO));
 567   data_ptr += sizeof(struct GNUNET_TIME_AbsoluteNBO);
 568
 569   memcpy(data_ptr, &flags_nbo, sizeof(uint16_t));
 570   data_ptr += sizeof(uint16_t);
 571
 572   memcpy(data_ptr, &offset, sizeof(uint64_t));
 573   data_ptr += sizeof(uint64_t);
 574
 575   memcpy(data_ptr, &depth, sizeof(uint32_t));
 576   data_ptr += sizeof(uint32_t);
 577
 578   memcpy(data_ptr, &revision, sizeof(uint32_t));
 579   data_ptr += sizeof(uint32_t);
 580
 581   memcpy(data_ptr, &size, sizeof(uint32_t));
 582   data_ptr += sizeof(uint32_t);
 583
 584   /**
 585    * FIXME note that this only works with raw data in nbo
 586    * write helper function that converts properly and returns buffer
 587    */
 588   memcpy(data_ptr, record_data, size);
 589   data_ptr += size;
 590   /*Doing this made me sad...*/
 591
 592   /**
 593    * FIXME magic number
 594    */
 595   timeout = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 20);
 596
 597   GNUNET_DHT_put (dht_handle, zone_hash,
 598                   5, //replication
 599                   GNUNET_DHT_RO_NONE,
 600                   GNUNET_BLOCK_TYPE_TEST, //FIXME todo
 601                   (data_ptr-data),
 602                   data,
 603                   expiration, //FIXME from record makes sense?
 604                   timeout,
 605                   NULL, //FIXME continuation needed? success check?
 606                   NULL); //cls for cont
 607
 608   /**
 609    * Reschedule update
 610    */
 611   GNUNET_SCHEDULER_add_delayed (dht_update_interval,
 612                                 &update_zone_dht,
 613                                 NULL);
 614
 615 }
 616
 617 /**
 618  * Periodically iterate over our zone and store everything in dht
 619  */
 620 static void
 621 update_zone_dht(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 622 {
 623   GNUNET_NAMESTORE_zone_transfer (namestore_handle, zone_hash,
 624                                   &put_gns_record,
 625                                   NULL);
 626 }
 627
 628 /**
 629  * Process GNS requests.
 630  *
 631  * @param cls closure
 632  * @param server the initialized server
 633  * @param c configuration to use
 634  */
 635 static void
 636 run (void *cls, struct GNUNET_SERVER_Handle *server,
 637      const struct GNUNET_CONFIGURATION_Handle *c)
 638 {
 639
 640   /* The IPC message types */
 641   static const struct GNUNET_SERVER_MessageHandler handlers[] = {
 642     /* callback, cls, type, size */
 643     {&handle_client_record_lookup, NULL, GNUNET_MESSAGE_TYPE_GNS_CLIENT_LOOKUP,
 644       0},
 645     {NULL, NULL, 0, 0}
 646   };
 647
 648   zone_key = GNUNET_CRYPTO_rsa_key_create ();
 649   GNUNET_CRYPTO_hash(zone_key, GNUNET_CRYPTO_RSA_KEY_LENGTH,//FIXME is this ok?
 650                      zone_hash);
 651
 652   nc = GNUNET_SERVER_notification_context_create (server, 1);
 653
 654   /* FIXME - do some config parsing
 655    *       - Maybe only hijack dns if option is set (HIJACK_DNS=1)
 656    */
 657
 658   GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
 659                                 NULL);
 660   /**
 661    * Do gnunet dns init here
 662    */
 663   dns_handle = GNUNET_DNS_connect(c,
 664                                   GNUNET_DNS_FLAG_PRE_RESOLUTION,
 665                                   &handle_dns_request, /* rh */
 666                                   NULL); /* Closure */
 667
 668   if (NULL == dns_handle)
 669   {
 670     GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
 671                "Failed to connect to the dnsservice!\n");
 672   }
 673
 674   /**
 675    * handle to our local namestore
 676    */
 677   namestore_handle = GNUNET_NAMESTORE_connect(c);
 678
 679   if (NULL == namestore_handle)
 680   {
 681     //FIXME do error handling;
 682     GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
 683                "Failed to connect to the namestore!\n");
 684   }
 685
 686   /**
 687    * handle to the dht
 688    */
 689   dht_handle = GNUNET_DHT_connect(c, 1); //FIXME get ht_len from cfg
 690
 691   if (NULL == dht_handle)
 692   {
 693     GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Could not connect to DHT!\n");
 694   }
 695
 696   dht_update_interval = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS,
 697                                                       60); //FIXME from cfg
 698   GNUNET_SCHEDULER_add_delayed (dht_update_interval,
 699                                 &update_zone_dht,
 700                                 NULL);
 701
 702   put_some_records();
 703
 704   GNUNET_SERVER_add_handlers (server, handlers);
 705   /**
 706    * Esp the lookup would require to keep track of the clients' context
 707    * See dht.
 708    * GNUNET_SERVER_disconnect_notify (server, &client_disconnect, NULL);
 709    **/
 710 }
 711
 712
 713 /**
 714  * The main function for the GNS service.
 715  *
 716  * @param argc number of arguments from the command line
 717  * @param argv command line arguments
 718  * @return 0 ok, 1 on error
 719  */
 720 int
 721 main (int argc, char *const *argv)
 722 {
 723   int ret;
 724
 725   ret =
 726       (GNUNET_OK ==
 727        GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
 728                            NULL)) ? 0 : 1;
 729   return ret;
 730 }
 731
 732 /* end of gnunet-service-gns.c */