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, 3)
  43 #define DHT_LOOKUP_TIMEOUT DHT_OPERATION_TIMEOUT
  44 #define DHT_GNS_REPLICATION_LEVEL 5
  45 #define MAX_DNS_LABEL_LENGTH 63
  46
  47 /* Ignore for now not used anyway and probably never will */
  48 #define GNUNET_MESSAGE_TYPE_GNS_LOOKUP 23
  49 #define GNUNET_MESSAGE_TYPE_GNS_LOOKUP_RESULT 24
  50 #define GNUNET_MESSAGE_TYPE_GNS_SHORTEN 25
  51 #define GNUNET_MESSAGE_TYPE_GNS_SHORTEN_RESULT 26
  52
  53
  54 struct AuthorityChain
  55 {
  56   struct AuthorityChain *prev;
  57
  58   struct AuthorityChain *next;
  59
  60   GNUNET_HashCode zone;
  61
  62   /* (local) name of the authority */
  63   char* name;
  64
  65   /* was the ns entry fresh */
  66   int fresh;
  67 };
  68
  69 struct GNUNET_GNS_ResolverHandle;
  70
  71 typedef void (*ResolutionResultProcessor) (void *cls,
  72                                   struct GNUNET_GNS_ResolverHandle *rh,
  73                                   uint32_t rd_count,
  74                                   const struct GNUNET_NAMESTORE_RecordData *rd);
  75
  76 enum ResolutionStatus
  77 {
  78   EXISTS = 1,
  79   EXPIRED = 2
  80 };
  81
  82 /**
  83  * Handle to a currenty pending resolution
  84  */
  85 struct GNUNET_GNS_ResolverHandle
  86 {
  87   /* The name to resolve */
  88   char *name;
  89
  90   /* the request handle to reply to */
  91   struct GNUNET_DNS_RequestHandle *request_handle;
  92
  93   /* the dns parser packet received */
  94   struct GNUNET_DNSPARSER_Packet *packet;
  95
  96   /* the query parsed from the packet */
  97
  98   struct GNUNET_DNSPARSER_Query *query;
  99
 100   /* has this query been answered? how many matches */
 101   int answered;
 102
 103   /* the authoritative zone to query */
 104   GNUNET_HashCode authority;
 105
 106   /* the name of the authoritative zone to query */
 107   char *authority_name;
 108
 109   /**
 110    * we have an authority in namestore that
 111    * may be able to resolve
 112    */
 113   int authority_found;
 114
 115   /* a handle for dht lookups. should be NULL if no lookups are in progress */
 116   struct GNUNET_DHT_GetHandle *get_handle;
 117
 118   /* timeout task for dht lookups */
 119   GNUNET_SCHEDULER_TaskIdentifier dht_timeout_task;
 120
 121   ResolutionResultProcessor proc;
 122
 123   void* proc_cls;
 124
 125   struct AuthorityChain *authority_chain_head;
 126   struct AuthorityChain *authority_chain_tail;
 127
 128   enum ResolutionStatus status;
 129
 130 };
 131
 132 struct ClientShortenHandle
 133 {
 134   struct GNUNET_SERVER_Client *client;
 135   uint64_t unique_id;
 136   GNUNET_HashCode key;
 137   char* name;
 138   uint32_t offset;
 139 };
 140
 141 /**
 142  * Our handle to the DNS handler library
 143  */
 144 struct GNUNET_DNS_Handle *dns_handle;
 145
 146 /**
 147  * Our handle to the DHT
 148  */
 149 struct GNUNET_DHT_Handle *dht_handle;
 150
 151 /**
 152  * Our zone's private key
 153  */
 154 struct GNUNET_CRYPTO_RsaPrivateKey *zone_key;
 155
 156 /**
 157  * Our handle to the namestore service
 158  * FIXME maybe need a second handle for iteration
 159  */
 160 struct GNUNET_NAMESTORE_Handle *namestore_handle;
 161
 162 /**
 163  * Handle to iterate over our authoritative zone in namestore
 164  */
 165 struct GNUNET_NAMESTORE_ZoneIterator *namestore_iter;
 166
 167 /**
 168  * The configuration the GNS service is running with
 169  */
 170 const struct GNUNET_CONFIGURATION_Handle *GNS_cfg;
 171
 172 /**
 173  * Our notification context.
 174  */
 175 static struct GNUNET_SERVER_NotificationContext *nc;
 176
 177 /**
 178  * Our zone hash
 179  */
 180 GNUNET_HashCode zone_hash;
 181
 182 /**
 183  * Our tld. Maybe get from config file
 184  */
 185 const char* gnunet_tld = ".gnunet";
 186
 187 /**
 188  * Useful for zone update for DHT put
 189  */
 190 static int num_public_records =  3600;
 191 struct GNUNET_TIME_Relative dht_update_interval;
 192 GNUNET_SCHEDULER_TaskIdentifier zone_update_taskid = GNUNET_SCHEDULER_NO_TASK;
 193
 194 //static void resolve_name(struct GNUNET_GNS_ResolverHandle *rh);
 195
 196 /**
 197  * Reply to client with the result from our lookup.
 198  *
 199  * @param rh the request handle of the lookup
 200  * @param rd_count the number of records to return
 201  * @param rd the record data
 202  */
 203 static void
 204 reply_to_dns(void* cls, struct GNUNET_GNS_ResolverHandle *rh, uint32_t rd_count,
 205              const struct GNUNET_NAMESTORE_RecordData *rd)
 206 {
 207   int i;
 208   size_t len;
 209   int ret;
 210   char *buf;
 211   struct GNUNET_DNSPARSER_Packet *packet = rh->packet;
 212   struct GNUNET_DNSPARSER_Record answer_records[rh->answered];
 213   struct GNUNET_DNSPARSER_Record additional_records[rd_count-(rh->answered)];
 214   packet->answers = answer_records;
 215   packet->additional_records = additional_records;
 216
 217   /**
 218    * Put records in the DNS packet and modify it
 219    * to a response
 220    */
 221   len = sizeof(struct GNUNET_DNSPARSER_Record*);
 222   for (i=0; i < rd_count; i++)
 223   {
 224
 225     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 226                "Adding type %d to DNS response\n", rd[i].record_type);
 227     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Name: %s\n", rh->name);
 228     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "QName: %s\n", rh->query->name);
 229     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Record %d/%d\n", i+1, rd_count);
 230     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Record len %d\n", rd[i].data_size);
 231
 232     if (rd[i].record_type == rh->query->type)
 233     {
 234       answer_records[i].name = rh->query->name;
 235       answer_records[i].type = rd[i].record_type;
 236       answer_records[i].data.raw.data_len = rd[i].data_size;
 237       answer_records[i].data.raw.data = (char*)rd[i].data;
 238       answer_records[i].expiration_time = rd[i].expiration;
 239       answer_records[i].class = GNUNET_DNSPARSER_CLASS_INTERNET;//hmmn
 240     }
 241     else
 242     {
 243       additional_records[i].name = rh->query->name;
 244       additional_records[i].type = rd[i].record_type;
 245       additional_records[i].data.raw.data_len = rd[i].data_size;
 246       additional_records[i].data.raw.data = (char*)rd[i].data;
 247       additional_records[i].expiration_time = rd[i].expiration;
 248       additional_records[i].class = GNUNET_DNSPARSER_CLASS_INTERNET;//hmmn
 249     }
 250   }
 251
 252   packet->num_answers = rh->answered;
 253   packet->num_additional_records = rd_count-(rh->answered);
 254
 255   if (0 == GNUNET_CRYPTO_hash_cmp(&rh->authority, &zone_hash))
 256     packet->flags.authoritative_answer = 1;
 257   else
 258     packet->flags.authoritative_answer = 0;
 259
 260   if (rd == NULL)
 261     packet->flags.return_code = GNUNET_DNSPARSER_RETURN_CODE_NAME_ERROR;
 262   else
 263     packet->flags.return_code = GNUNET_DNSPARSER_RETURN_CODE_NO_ERROR;
 264
 265   packet->flags.query_or_response = 1;
 266
 267
 268   /**
 269    * Reply to DNS
 270    */
 271   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 272              "Building DNS response\n");
 273   ret = GNUNET_DNSPARSER_pack (packet,
 274                                1024, /* FIXME magic from dns redirector */
 275                                &buf,
 276                                &len);
 277   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 278              "Built DNS response! (ret=%d,len=%d)\n", ret, len);
 279   if (ret == GNUNET_OK)
 280   {
 281     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 282                "Answering DNS request\n");
 283     GNUNET_DNS_request_answer(rh->request_handle,
 284                               len,
 285                               buf);
 286     //GNUNET_free(answer);
 287     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Answered DNS request\n");
 288   }
 289   else
 290   {
 291     GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
 292                "Error building DNS response! (ret=%d)", ret);
 293   }
 294
 295   GNUNET_free(rh->name);
 296   GNUNET_free(rh);
 297 }
 298
 299
 300 /**
 301  * Task run during shutdown.
 302  *
 303  * @param cls unused
 304  * @param tc unused
 305  */
 306 static void
 307 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 308 {
 309   /* Kill zone task for it may make the scheduler hang */
 310   if (zone_update_taskid)
 311     GNUNET_SCHEDULER_cancel(zone_update_taskid);
 312
 313   GNUNET_DNS_disconnect(dns_handle);
 314   GNUNET_NAMESTORE_disconnect(namestore_handle, 1);
 315   GNUNET_DHT_disconnect(dht_handle);
 316 }
 317
 318 /**
 319  * Callback when record data is put into namestore
 320  *
 321  * @param cls the closure
 322  * @param success GNUNET_OK on success
 323  * @param emsg the error message. NULL if SUCCESS==GNUNET_OK
 324  */
 325 void
 326 on_namestore_record_put_result(void *cls,
 327                                int32_t success,
 328                                const char *emsg)
 329 {
 330   if (GNUNET_NO == success)
 331   {
 332     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "records already in namestore\n");
 333     return;
 334   }
 335   else if (GNUNET_YES == success)
 336   {
 337     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 338                "records successfully put in namestore\n");
 339     return;
 340   }
 341
 342   GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
 343              "Error putting records into namestore: %s\n", emsg);
 344 }
 345
 346 /**
 347  * Handle timeout for DHT requests
 348  *
 349  * @param cls the request handle as closure
 350  * @param tc the task context
 351  */
 352 static void
 353 dht_lookup_timeout(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
 354 {
 355   struct GNUNET_GNS_ResolverHandle *rh = cls;
 356
 357   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 358              "dht lookup for query %s (type=%d) timed out.\n",
 359              rh->name, rh->query->type);
 360
 361   GNUNET_DHT_get_stop (rh->get_handle);
 362   rh->proc(rh->proc_cls, rh, 0, NULL);
 363 }
 364
 365
 366
 367 /**
 368  * Function called when we get a result from the dht
 369  * for our query
 370  *
 371  * @param cls the request handle
 372  * @param exp lifetime
 373  * @param key the key the record was stored under
 374  * @param get_path get path
 375  * @param get_path_length get path length
 376  * @param put_path put path
 377  * @param put_path_length put path length
 378  * @param type the block type
 379  * @param size the size of the record
 380  * @param data the record data
 381  */
 382 static void
 383 process_record_dht_result(void* cls,
 384                  struct GNUNET_TIME_Absolute exp,
 385                  const GNUNET_HashCode * key,
 386                  const struct GNUNET_PeerIdentity *get_path,
 387                  unsigned int get_path_length,
 388                  const struct GNUNET_PeerIdentity *put_path,
 389                  unsigned int put_path_length,
 390                  enum GNUNET_BLOCK_Type type,
 391                  size_t size, const void *data)
 392 {
 393   struct GNUNET_GNS_ResolverHandle *rh;
 394   struct GNSNameRecordBlock *nrb;
 395   uint32_t num_records;
 396   char* name = NULL;
 397   char* rd_data = (char*)data;
 398   int i;
 399   int rd_size;
 400
 401   GNUNET_HashCode zone, name_hash;
 402   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "got dht result (size=%d)\n", size);
 403
 404   if (data == NULL)
 405     return;
 406
 407   //FIXME maybe check expiration here, check block type
 408
 409   rh = (struct GNUNET_GNS_ResolverHandle *)cls;
 410   nrb = (struct GNSNameRecordBlock*)data;
 411
 412   /* stop lookup and timeout task */
 413   GNUNET_DHT_get_stop (rh->get_handle);
 414   GNUNET_SCHEDULER_cancel(rh->dht_timeout_task);
 415
 416   rh->get_handle = NULL;
 417   name = (char*)&nrb[1];
 418   num_records = ntohl(nrb->rd_count);
 419   {
 420     struct GNUNET_NAMESTORE_RecordData rd[num_records];
 421
 422     rd_data += strlen(name) + 1 + sizeof(struct GNSNameRecordBlock);
 423     rd_size = size - strlen(name) - 1 - sizeof(struct GNSNameRecordBlock);
 424
 425     if (GNUNET_SYSERR == GNUNET_NAMESTORE_records_deserialize (rd_size,
 426                                                                rd_data,
 427                                                                num_records,
 428                                                                rd))
 429     {
 430       GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Error deserializing data!\n");
 431       return;
 432     }
 433
 434     for (i=0; i<num_records; i++)
 435     {
 436       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 437                "Got name: %s (wanted %s)\n", name, rh->name);
 438       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 439                "Got type: %d (wanted %d)\n",
 440                rd[i].record_type, rh->query->type);
 441       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 442                "Got data length: %d\n", rd[i].data_size);
 443       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 444                "Got flag %d\n", rd[i].flags);
 445
 446      if ((strcmp(name, rh->name) == 0) &&
 447          (rd[i].record_type == rh->query->type))
 448       {
 449         rh->answered++;
 450       }
 451
 452     }
 453
 454     GNUNET_CRYPTO_hash(name, strlen(name), &name_hash);
 455     GNUNET_CRYPTO_hash_xor(key, &name_hash, &zone);
 456
 457     /**
 458      * FIXME check pubkey against existing key in namestore?
 459      * https://gnunet.org/bugs/view.php?id=2179
 460      */
 461
 462     /* Save to namestore */
 463     GNUNET_NAMESTORE_record_put (namestore_handle,
 464                                  &nrb->public_key,
 465                                  name,
 466                                  exp,
 467                                  num_records,
 468                                  rd,
 469                                  &nrb->signature,
 470                                  &on_namestore_record_put_result, //cont
 471                                  NULL); //cls
 472
 473     if (rh->answered)
 474       rh->proc(rh->proc_cls, rh, num_records, rd);
 475     else
 476       rh->proc(rh->proc_cls, rh, 0, NULL);
 477   }
 478
 479 }
 480
 481
 482 /**
 483  * Start DHT lookup for a (name -> query->record_type) record in
 484  * rh->authority's zone
 485  *
 486  * @param rh the pending gns query context
 487  * @param name the name to query record
 488  */
 489 static void
 490 resolve_record_from_dht(struct GNUNET_GNS_ResolverHandle *rh)
 491 {
 492   uint32_t xquery;
 493   GNUNET_HashCode name_hash;
 494   GNUNET_HashCode lookup_key;
 495   struct GNUNET_CRYPTO_HashAsciiEncoded lookup_key_string;
 496
 497   GNUNET_CRYPTO_hash(rh->name, strlen(rh->name), &name_hash);
 498   GNUNET_CRYPTO_hash_xor(&name_hash, &rh->authority, &lookup_key);
 499   GNUNET_CRYPTO_hash_to_enc (&lookup_key, &lookup_key_string);
 500
 501   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 502              "starting dht lookup for %s with key: %s\n",
 503              rh->name, (char*)&lookup_key_string);
 504
 505   rh->dht_timeout_task = GNUNET_SCHEDULER_add_delayed(DHT_LOOKUP_TIMEOUT,
 506                                                       &dht_lookup_timeout, rh);
 507
 508   xquery = htonl(rh->query->type);
 509   rh->get_handle = GNUNET_DHT_get_start(dht_handle,
 510                        DHT_OPERATION_TIMEOUT,
 511                        GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
 512                        &lookup_key,
 513                        DHT_GNS_REPLICATION_LEVEL,
 514                        GNUNET_DHT_RO_NONE,
 515                        &xquery,
 516                        sizeof(xquery),
 517                        &process_record_dht_result,
 518                        rh);
 519
 520 }
 521
 522
 523 /**
 524  * Namestore calls this function if we have record for this name.
 525  * (or with rd_count=0 to indicate no matches)
 526  *
 527  * @param cls the pending query
 528  * @param key the key of the zone we did the lookup
 529  * @param expiration expiration date of the namestore entry
 530  * @param name the name for which we need an authority
 531  * @param rd_count the number of records with 'name'
 532  * @param rd the record data
 533  * @param signature the signature of the authority for the record data
 534  */
 535 static void
 536 process_record_lookup_ns(void* cls,
 537                   const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
 538                   struct GNUNET_TIME_Absolute expiration,
 539                   const char *name, unsigned int rd_count,
 540                   const struct GNUNET_NAMESTORE_RecordData *rd,
 541                   const struct GNUNET_CRYPTO_RsaSignature *signature)
 542 {
 543   struct GNUNET_GNS_ResolverHandle *rh;
 544   struct GNUNET_TIME_Relative remaining_time;
 545   GNUNET_HashCode zone;
 546
 547   rh = (struct GNUNET_GNS_ResolverHandle *) cls;
 548   GNUNET_CRYPTO_hash(key,
 549                      sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
 550                      &zone);
 551   remaining_time = GNUNET_TIME_absolute_get_remaining (expiration);
 552
 553   rh->status = 0;
 554
 555   if (name != NULL)
 556   {
 557     rh->status |= EXISTS;
 558   }
 559
 560   if (remaining_time.rel_value == 0)
 561   {
 562     rh->status |= EXPIRED;
 563   }
 564
 565   if (rd_count == 0)
 566   {
 567     /**
 568      * Lookup terminated and no results
 569      */
 570     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 571                "Namestore lookup for %s terminated without results\n", name);
 572
 573
 574
 575     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 576                "Record %s unknown in namestore\n",
 577                rh->name);
 578     /**
 579      * Our zone and no result? Cannot resolve TT
 580      */
 581     rh->proc(rh->proc_cls, rh, 0, NULL);
 582     return;
 583
 584   }
 585   else
 586   {
 587
 588     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 589                "Processing additional result %s from namestore\n", name);
 590     int i;
 591     for (i=0; i<rd_count;i++)
 592     {
 593
 594       if (rd[i].record_type != rh->query->type)
 595         continue;
 596
 597       if ((GNUNET_TIME_absolute_get_remaining (rd[i].expiration)).rel_value
 598           == 0)
 599       {
 600         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "This record is expired. Skipping\n");
 601         continue;
 602       }
 603
 604       rh->answered++;
 605
 606     }
 607
 608     /**
 609      * no answers found
 610      */
 611     if (rh->answered == 0)
 612     {
 613       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 614                  "No answers found. This is odd!\n");
 615       rh->proc(rh->proc_cls, rh, 0, NULL);
 616       return;
 617     }
 618
 619     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Found %d answer(s) to query!\n",
 620                rh->answered);
 621
 622     rh->proc(rh->proc_cls, rh, rd_count, rd);
 623   }
 624 }
 625
 626 /**
 627  * The final phase of resolution.
 628  * This is a name that is canonical and we do not have a delegation.
 629  *
 630  * @param rh the pending lookup
 631  */
 632 static void
 633 resolve_record_from_ns(struct GNUNET_GNS_ResolverHandle *rh)
 634 {
 635
 636   /**
 637    * Try to resolve this record in our namestore.
 638    * The name to resolve is now in rh->authority_name
 639    * since we tried to resolve it to an authority
 640    * and failed.
 641    **/
 642   GNUNET_NAMESTORE_lookup_record(namestore_handle,
 643                                  &rh->authority,
 644                                  rh->name,
 645                                  rh->query->type,
 646                                  &process_record_lookup_ns,
 647                                  rh);
 648
 649 }
 650
 651
 652 /**
 653  * Handle timeout for DHT requests
 654  *
 655  * @param cls the request handle as closure
 656  * @param tc the task context
 657  */
 658 static void
 659 dht_authority_lookup_timeout(void *cls,
 660                              const struct GNUNET_SCHEDULER_TaskContext *tc)
 661 {
 662   struct GNUNET_GNS_ResolverHandle *rh = cls;
 663
 664   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 665              "dht lookup for query %s (type=%d) timed out.\n",
 666              rh->name, rh->query->type);
 667
 668   GNUNET_DHT_get_stop (rh->get_handle);
 669   if (strcmp(rh->name, "") == 0)
 670   {
 671     /*
 672      * promote authority back to name and try to resolve record
 673      */
 674     strcpy(rh->name, rh->authority_name);
 675   }
 676   rh->proc(rh->proc_cls, rh, 0, NULL);
 677 }
 678
 679 // Prototype
 680 static void resolve_delegation_from_dht(struct GNUNET_GNS_ResolverHandle *rh);
 681
 682 /**
 683  * Function called when we get a result from the dht
 684  * for our query. Recursively tries to resolve PKEYs
 685  * for name in DHT.
 686  *
 687  * @param cls the request handle
 688  * @param exp lifetime
 689  * @param key the key the record was stored under
 690  * @param get_path get path
 691  * @param get_path_length get path length
 692  * @param put_path put path
 693  * @param put_path_length put path length
 694  * @param type the block type
 695  * @param size the size of the record
 696  * @param data the record data
 697  */
 698 static void
 699 process_authority_dht_result(void* cls,
 700                  struct GNUNET_TIME_Absolute exp,
 701                  const GNUNET_HashCode * key,
 702                  const struct GNUNET_PeerIdentity *get_path,
 703                  unsigned int get_path_length,
 704                  const struct GNUNET_PeerIdentity *put_path,
 705                  unsigned int put_path_length,
 706                  enum GNUNET_BLOCK_Type type,
 707                  size_t size, const void *data)
 708 {
 709   struct GNUNET_GNS_ResolverHandle *rh;
 710   struct GNSNameRecordBlock *nrb;
 711   uint32_t num_records;
 712   char* name = NULL;
 713   char* rd_data = (char*) data;
 714   int i;
 715   int rd_size;
 716   GNUNET_HashCode zone, name_hash;
 717
 718   if (data == NULL)
 719     return;
 720
 721   //FIXME check expiration?
 722
 723   rh = (struct GNUNET_GNS_ResolverHandle *)cls;
 724   nrb = (struct GNSNameRecordBlock*)data;
 725
 726   /* stop dht lookup and timeout task */
 727   GNUNET_DHT_get_stop (rh->get_handle);
 728   GNUNET_SCHEDULER_cancel(rh->dht_timeout_task);
 729
 730   rh->get_handle = NULL;
 731   num_records = ntohl(nrb->rd_count);
 732   name = (char*)&nrb[1];
 733   {
 734     struct GNUNET_NAMESTORE_RecordData rd[num_records];
 735
 736     rd_data += strlen(name) + 1 + sizeof(struct GNSNameRecordBlock);
 737     rd_size = size - strlen(name) - 1 - sizeof(struct GNSNameRecordBlock);
 738
 739     if (GNUNET_SYSERR == GNUNET_NAMESTORE_records_deserialize (rd_size,
 740                                                                rd_data,
 741                                                                num_records,
 742                                                                rd))
 743     {
 744       GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Error deserializing data!\n");
 745       return;
 746     }
 747
 748     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 749                "Got name: %s (wanted %s)\n", name, rh->authority_name);
 750     for (i=0; i<num_records; i++)
 751     {
 752
 753       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 754                 "Got name: %s (wanted %s)\n", name, rh->authority_name);
 755       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 756                  "Got type: %d (wanted %d)\n",
 757                  rd[i].record_type, GNUNET_GNS_RECORD_PKEY);
 758       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 759                  "Got data length: %d\n", rd[i].data_size);
 760       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 761                  "Got flag %d\n", rd[i].flags);
 762
 763       if ((strcmp(name, rh->authority_name) == 0) &&
 764           (rd[i].record_type == GNUNET_GNS_RECORD_PKEY))
 765       {
 766         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Authority found in DHT\n");
 767         rh->answered = 1;
 768         memcpy(&rh->authority, rd[i].data, sizeof(GNUNET_HashCode));
 769         struct AuthorityChain *auth =
 770           GNUNET_malloc(sizeof(struct AuthorityChain));
 771         auth->zone = rh->authority;
 772         GNUNET_CONTAINER_DLL_insert (rh->authority_chain_head,
 773                                      rh->authority_chain_tail,
 774                                      auth);
 775       }
 776
 777     }
 778
 779
 780     GNUNET_CRYPTO_hash(name, strlen(name), &name_hash);
 781     GNUNET_CRYPTO_hash_xor(key, &name_hash, &zone);
 782
 783     /* Save to namestore */
 784     if (0 != GNUNET_CRYPTO_hash_cmp(&zone_hash, &zone))
 785     {
 786       GNUNET_NAMESTORE_record_put (namestore_handle,
 787                                  &nrb->public_key,
 788                                  name,
 789                                  exp,
 790                                  num_records,
 791                                  rd,
 792                                  &nrb->signature,
 793                                  &on_namestore_record_put_result, //cont
 794                                  NULL); //cls
 795     }
 796   }
 797
 798   if (rh->answered)
 799   {
 800     rh->answered = 0;
 801     /* delegate */
 802     if (strcmp(rh->name, "") == 0)
 803       rh->proc(rh->proc_cls, rh, 0, NULL);
 804     else
 805       resolve_delegation_from_dht(rh);
 806     return;
 807   }
 808
 809   /**
 810    * should never get here unless false dht key/put
 811    * block plugin should handle this
 812    **/
 813
 814   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "DHT authority lookup error!\n");
 815   GNUNET_break(0);
 816 }
 817
 818
 819 /**
 820  * Process DHT lookup result for record.
 821  *
 822  * @param cls the closure
 823  * @param rh resolver handle
 824  * @param rd_count number of results (always 0)
 825  * @param rd record data (always NULL)
 826  */
 827 static void
 828 process_record_result_dht(void* cls, struct GNUNET_GNS_ResolverHandle *rh,
 829                        unsigned int rd_count,
 830                        const struct GNUNET_NAMESTORE_RecordData *rd)
 831 {
 832   if (rd_count == 0)
 833   {
 834     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 835                "No records for %s found in DHT. Aborting\n",
 836                rh->name);
 837     /* give up, cannot resolve */
 838     reply_to_dns(NULL, rh, 0, NULL);
 839     return;
 840   }
 841
 842   /* results found yay */
 843   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 844              "Record resolved from namestore!");
 845   reply_to_dns(NULL, rh, rd_count, rd);
 846
 847 }
 848
 849
 850 /**
 851  * Process namestore lookup result for record.
 852  *
 853  * @param cls the closure
 854  * @param rh resolver handle
 855  * @param rd_count number of results (always 0)
 856  * @param rd record data (always NULL)
 857  */
 858 static void
 859 process_record_result_ns(void* cls, struct GNUNET_GNS_ResolverHandle *rh,
 860                        unsigned int rd_count,
 861                        const struct GNUNET_NAMESTORE_RecordData *rd)
 862 {
 863   if (rd_count == 0)
 864   {
 865     /* ns entry expired. try dht */
 866     if (rh->status & (EXPIRED | !EXISTS))
 867     {
 868       rh->proc = &process_record_result_dht;
 869       resolve_record_from_dht(rh);
 870       return;
 871     }
 872     /* give up, cannot resolve */
 873     reply_to_dns(NULL, rh, 0, NULL);
 874     return;
 875   }
 876
 877   /* results found yay */
 878   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 879              "Record resolved from namestore!");
 880   reply_to_dns(NULL, rh, rd_count, rd);
 881
 882 }
 883
 884
 885 /**
 886  * Determine if this name is canonical.
 887  * i.e.
 888  * a.b.gnunet  = not canonical
 889  * a           = canonical
 890  *
 891  * @param name the name to test
 892  * @return 1 if canonical
 893  */
 894 static int
 895 is_canonical(char* name)
 896 {
 897   uint32_t len = strlen(name);
 898   int i;
 899
 900   for (i=0; i<len; i++)
 901   {
 902     if (*(name+i) == '.')
 903       return 0;
 904   }
 905   return 1;
 906 }
 907
 908 /**
 909  * Move one level up in the domain hierarchy and return the
 910  * passed top level domain.
 911  *
 912  * @param name the domain
 913  * @param dest the destination where the tld will be put
 914  */
 915 void
 916 pop_tld(char* name, char* dest)
 917 {
 918   uint32_t len;
 919
 920   if (is_canonical(name))
 921   {
 922     strcpy(dest, name);
 923     strcpy(name, "");
 924     return;
 925   }
 926
 927   for (len = strlen(name); len > 0; len--)
 928   {
 929     if (*(name+len) == '.')
 930       break;
 931   }
 932
 933   //Was canonical?
 934   if (len == 0)
 935     return;
 936
 937   name[len] = '\0';
 938
 939   strcpy(dest, (name+len+1));
 940 }
 941
 942 /**
 943  * DHT resolution for delegation finished. Processing result.
 944  *
 945  * @param cls the closure
 946  * @param rh resolver handle
 947  * @param rd_count number of results (always 0)
 948  * @param rd record data (always NULL)
 949  */
 950 static void
 951 process_dht_delegation_dns(void* cls, struct GNUNET_GNS_ResolverHandle *rh,
 952                           unsigned int rd_count,
 953                           const struct GNUNET_NAMESTORE_RecordData *rd)
 954 {
 955   if (strcmp(rh->name, "") == 0)
 956   {
 957     /* We resolved full name for delegation. resolving record */
 958     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 959       "Resolved full name for delegation via DHT. resolving record '' in ns\n");
 960     rh->proc = &process_record_result_ns;
 961     resolve_record_from_ns(rh);
 962     return;
 963   }
 964
 965   /**
 966    * we still have some left
 967    **/
 968   if (is_canonical(rh->name))
 969   {
 970     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 971                "Resolving canonical record %s in ns\n", rh->name);
 972     rh->proc = &process_record_result_ns;
 973     resolve_record_from_ns(rh);
 974     return;
 975   }
 976   /* give up, cannot resolve */
 977   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
 978              "Cannot fully resolve delegation for %s via DHT!\n",
 979              rh->name);
 980   reply_to_dns(NULL, rh, 0, NULL);
 981 }
 982
 983
 984 /**
 985  * Start DHT lookup for a name -> PKEY (compare NS) record in
 986  * rh->authority's zone
 987  *
 988  * @param rh the pending gns query
 989  * @param name the name of the PKEY record
 990  */
 991 static void
 992 resolve_delegation_from_dht(struct GNUNET_GNS_ResolverHandle *rh)
 993 {
 994   uint32_t xquery;
 995   GNUNET_HashCode name_hash;
 996   GNUNET_HashCode lookup_key;
 997
 998   GNUNET_CRYPTO_hash(rh->authority_name,
 999                      strlen(rh->authority_name),
1000                      &name_hash);
1001   GNUNET_CRYPTO_hash_xor(&name_hash, &rh->authority, &lookup_key);
1002
1003   rh->dht_timeout_task = GNUNET_SCHEDULER_add_delayed (DHT_LOOKUP_TIMEOUT,
1004                                                   &dht_authority_lookup_timeout,
1005                                                        rh);
1006
1007   xquery = htonl(GNUNET_GNS_RECORD_PKEY);
1008
1009   rh->get_handle = GNUNET_DHT_get_start(dht_handle,
1010                        DHT_OPERATION_TIMEOUT,
1011                        GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
1012                        &lookup_key,
1013                        DHT_GNS_REPLICATION_LEVEL,
1014                        GNUNET_DHT_RO_NONE,
1015                        &xquery,
1016                        sizeof(xquery),
1017                        &process_authority_dht_result,
1018                        rh);
1019
1020 }
1021
1022
1023 /**
1024  * Namestore resolution for delegation finished. Processing result.
1025  *
1026  * @param cls the closure
1027  * @param rh resolver handle
1028  * @param rd_count number of results (always 0)
1029  * @param rd record data (always NULL)
1030  */
1031 static void
1032 process_ns_delegation_dns(void* cls, struct GNUNET_GNS_ResolverHandle *rh,
1033                           unsigned int rd_count,
1034                           const struct GNUNET_NAMESTORE_RecordData *rd)
1035 {
1036   if (strcmp(rh->name, "") == 0)
1037   {
1038     /* We resolved full name for delegation. resolving record */
1039     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1040                "Resolved full name for delegation. resolving record ''\n");
1041     rh->proc = &process_record_result_ns;
1042     resolve_record_from_ns(rh);
1043     return;
1044   }
1045
1046   /**
1047    * we still have some left
1048    * check if ns entry is fresh
1049    **/
1050   if (rh->status & (EXISTS | !EXPIRED))
1051   {
1052     if (is_canonical(rh->name))
1053     {
1054       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1055                  "Resolving canonical record %s\n", rh->name);
1056       rh->proc = &process_record_result_ns;
1057       resolve_record_from_ns(rh);
1058     }
1059     else
1060     {
1061       /* give up, cannot resolve */
1062       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1063                  "Cannot fully resolve delegation for %s!\n",
1064                  rh->name);
1065       reply_to_dns(NULL, rh, 0, NULL);
1066     }
1067     return;
1068   }
1069
1070   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1071              "Trying to resolve delegation for %s via DHT\n",
1072              rh->name);
1073   rh->proc = &process_dht_delegation_dns;
1074   resolve_delegation_from_dht(rh);
1075 }
1076
1077 //Prototype
1078 static void resolve_delegation_from_ns(struct GNUNET_GNS_ResolverHandle *rh);
1079
1080 /**
1081  * This is a callback function that should give us only PKEY
1082  * records. Used to query the namestore for the authority (PKEY)
1083  * for 'name'. It will recursively try to resolve the
1084  * authority for a given name from the namestore.
1085  *
1086  * @param cls the pending query
1087  * @param key the key of the zone we did the lookup
1088  * @param expiration expiration date of the record data set in the namestore
1089  * @param name the name for which we need an authority
1090  * @param rd_count the number of records with 'name'
1091  * @param rd the record data
1092  * @param signature the signature of the authority for the record data
1093  */
1094 static void
1095 process_authority_lookup_ns(void* cls,
1096                    const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
1097                    struct GNUNET_TIME_Absolute expiration,
1098                    const char *name,
1099                    unsigned int rd_count,
1100                    const struct GNUNET_NAMESTORE_RecordData *rd,
1101                    const struct GNUNET_CRYPTO_RsaSignature *signature)
1102 {
1103   struct GNUNET_GNS_ResolverHandle *rh;
1104   struct GNUNET_TIME_Relative remaining_time;
1105   GNUNET_HashCode zone;
1106   char* new_name;
1107
1108   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Got %d records from authority lookup\n",
1109              rd_count);
1110
1111   rh = (struct GNUNET_GNS_ResolverHandle *)cls;
1112   GNUNET_CRYPTO_hash(key,
1113                      sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1114                      &zone);
1115   remaining_time = GNUNET_TIME_absolute_get_remaining (expiration);
1116
1117   rh->status = 0;
1118
1119   if (name != NULL)
1120   {
1121     rh->status |= EXISTS;
1122   }
1123
1124   if (remaining_time.rel_value == 0)
1125   {
1126     rh->status |= EXPIRED;
1127   }
1128
1129   /**
1130    * No authority found in namestore.
1131    */
1132   if (rd_count == 0)
1133   {
1134     /**
1135      * We did not find an authority in the namestore
1136      */
1137
1138     /**
1139      * No PKEY in zone.
1140      * Promote this authority back to a name maybe it is
1141      * our record.
1142      */
1143     if (strcmp(rh->name, "") == 0)
1144     {
1145       /* simply promote back */
1146       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1147                  "Promoting %s back to name\n", rh->authority_name);
1148       strcpy(rh->name, rh->authority_name);
1149     }
1150     else
1151     {
1152       /* add back to existing name */
1153       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1154                  "Adding %s back to %s\n",
1155                  rh->authority_name, rh->name);
1156       new_name = GNUNET_malloc(strlen(rh->name)
1157                                + strlen(rh->authority_name) + 2);
1158       memset(new_name, 0, strlen(rh->name) + strlen(rh->authority_name) + 2);
1159       strcpy(new_name, rh->name);
1160       strcpy(new_name+strlen(new_name)+1, ".");
1161       strcpy(new_name+strlen(new_name)+2, rh->authority_name);
1162       GNUNET_free(rh->name);
1163       rh->name = new_name;
1164     }
1165     rh->proc(rh->proc_cls, rh, 0, NULL);
1166     return;
1167   }
1168
1169   //Note only 1 pkey should have been returned.. anything else would be strange
1170   /**
1171    * We found an authority that may be able to help us
1172    * move on with query
1173    */
1174   int i;
1175   for (i=0; i<rd_count;i++)
1176   {
1177
1178     if (rd[i].record_type != GNUNET_GNS_RECORD_PKEY)
1179       continue;
1180
1181     if ((GNUNET_TIME_absolute_get_remaining (rd[i].expiration)).rel_value
1182          == 0)
1183     {
1184       GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "This pkey is expired.\n");
1185       if (remaining_time.rel_value == 0)
1186       {
1187         GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1188                    "This dht entry is expired.\n");
1189         rh->authority_chain_head->fresh = 0;
1190         rh->proc(rh->proc_cls, rh, 0, NULL);
1191         return;
1192       }
1193
1194       continue;
1195     }
1196
1197     /**
1198      * Resolve rest of query with new authority
1199      */
1200     GNUNET_assert(rd[i].record_type == GNUNET_GNS_RECORD_PKEY);
1201     memcpy(&rh->authority, rd[i].data, sizeof(GNUNET_HashCode));
1202     struct AuthorityChain *auth = GNUNET_malloc(sizeof(struct AuthorityChain));
1203     auth->zone = rh->authority;
1204     GNUNET_CONTAINER_DLL_insert (rh->authority_chain_head,
1205                                  rh->authority_chain_tail,
1206                                  auth);
1207
1208     /**
1209      * We are done with PKEY resolution if name is empty
1210      * else resolve again with new authority
1211      */
1212     if (strcmp(rh->name, "") == 0)
1213       rh->proc(rh->proc_cls, rh, 0, NULL);
1214     else
1215       resolve_delegation_from_ns(rh);
1216     return;
1217   }
1218
1219   /**
1220    * no answers found
1221    */
1222   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1223              "Authority lookup successful but no PKEY... never get here\n");
1224   rh->proc(rh->proc_cls, rh, 0, NULL);
1225 }
1226
1227
1228 /**
1229  * Resolve the delegation chain for the request
1230  *
1231  * @param rh the resolver handle
1232  */
1233 static void
1234 resolve_delegation_from_ns(struct GNUNET_GNS_ResolverHandle *rh)
1235 {
1236
1237   pop_tld(rh->name, rh->authority_name);
1238   GNUNET_NAMESTORE_lookup_record(namestore_handle,
1239                                  &rh->authority,
1240                                  rh->authority_name,
1241                                  GNUNET_GNS_RECORD_PKEY,
1242                                  &process_authority_lookup_ns,
1243                                  rh);
1244
1245 }
1246
1247 /**
1248  * Entry point for name resolution
1249  * Setup a new query and try to resolve
1250  *
1251  * @param request the request handle of the DNS request from a client
1252  * @param p the DNS query packet we received
1253  * @param q the DNS query we received parsed from p
1254  */
1255 static void
1256 start_resolution_from_dns(struct GNUNET_DNS_RequestHandle *request,
1257                           struct GNUNET_DNSPARSER_Packet *p,
1258                           struct GNUNET_DNSPARSER_Query *q)
1259 {
1260   struct GNUNET_GNS_ResolverHandle *rh;
1261
1262   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1263               "Starting resolution for %s (type=%d)!\n",
1264               q->name, q->type);
1265
1266   rh = GNUNET_malloc(sizeof (struct GNUNET_GNS_ResolverHandle));
1267   rh->packet = p;
1268   rh->query = q;
1269   rh->authority = zone_hash;
1270
1271
1272   rh->name = GNUNET_malloc(strlen(q->name)
1273                               - strlen(gnunet_tld) + 1);
1274   memset(rh->name, 0,
1275          strlen(q->name)-strlen(gnunet_tld) + 1);
1276   memcpy(rh->name, q->name,
1277          strlen(q->name)-strlen(gnunet_tld));
1278
1279   rh->authority_name = GNUNET_malloc(sizeof(char)*MAX_DNS_LABEL_LENGTH);
1280
1281   rh->request_handle = request;
1282
1283   rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
1284   rh->authority_chain_tail = rh->authority_chain_head;
1285   rh->authority_chain_head->zone = zone_hash;
1286
1287   /* Start resolution in our zone */
1288   rh->proc = &process_ns_delegation_dns;
1289   resolve_delegation_from_ns(rh);
1290 }
1291
1292 /**
1293  * The DNS request handler
1294  * Called for every incoming DNS request.
1295  *
1296  * @param cls closure
1297  * @param rh request handle to user for reply
1298  * @param request_length number of bytes in request
1299  * @param request udp payload of the DNS request
1300  */
1301 static void
1302 handle_dns_request(void *cls,
1303                    struct GNUNET_DNS_RequestHandle *rh,
1304                    size_t request_length,
1305                    const char *request)
1306 {
1307   struct GNUNET_DNSPARSER_Packet *p;
1308   char *tldoffset;
1309
1310   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Hijacked a DNS request...processing\n");
1311   p = GNUNET_DNSPARSER_parse (request, request_length);
1312
1313   if (NULL == p)
1314   {
1315     GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1316                 "Received malformed DNS packet, leaving it untouched\n");
1317     GNUNET_DNS_request_forward (rh);
1318     return;
1319   }
1320
1321   /**
1322    * Check tld and decide if we or
1323    * legacy dns is responsible
1324    *
1325    * FIXME now in theory there could be more than 1 query in the request
1326    * but if this is case we get into trouble:
1327    * either we query the GNS or the DNS. We cannot do both!
1328    * So I suggest to either only allow a single query per request or
1329    * only allow GNS or DNS requests.
1330    * The way it is implemented here now is buggy and will lead to erratic
1331    * behaviour (if multiple queries are present).
1332    */
1333   if (p->num_queries == 0)
1334   {
1335     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1336                 "No Queries in DNS packet... forwarding\n");
1337     GNUNET_DNS_request_forward (rh);
1338   }
1339
1340   if (p->num_queries > 1)
1341   {
1342     /* Note: We could also look for .gnunet */
1343     GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1344                 ">1 queriy in DNS packet... odd. We only process #1\n");
1345   }
1346
1347
1348   /**
1349    * Check for .gnunet
1350    */
1351   tldoffset = p->queries[0].name + strlen(p->queries[0].name);
1352
1353   while ((*tldoffset) != '.')
1354     tldoffset--;
1355
1356   if (0 == strcmp(tldoffset, gnunet_tld))
1357   {
1358     start_resolution_from_dns(rh, p, p->queries);
1359   }
1360   else
1361   {
1362     /**
1363      * This request does not concern us. Forward to real DNS.
1364      */
1365     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1366                "Request for %s is forwarded to DNS\n", p->queries[0].name);
1367     GNUNET_DNS_request_forward (rh);
1368   }
1369
1370 }
1371
1372 /**
1373  * Method called periodicattluy that triggers
1374  * iteration over root zone
1375  *
1376  * @param cls closure
1377  * @param tc task context
1378  */
1379 static void
1380 update_zone_dht_next(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1381 {
1382   GNUNET_NAMESTORE_zone_iterator_next(namestore_iter);
1383 }
1384
1385 /**
1386  * Continuation for DHT put
1387  *
1388  * @param cls closure
1389  * @param tc task context
1390  */
1391 static void
1392 record_dht_put(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1393 {
1394   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "put request transmitted\n");
1395 }
1396
1397 /* prototype */
1398 static void
1399 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1400
1401 /**
1402  * Function used to put all records successively into the DHT.
1403  *
1404  * @param cls the closure (NULL)
1405  * @param key the public key of the authority (ours)
1406  * @param expiration lifetime of the namestore entry
1407  * @param name the name of the records
1408  * @param rd_count the number of records in data
1409  * @param rd the record data
1410  * @param signature the signature for the record data
1411  */
1412 static void
1413 put_gns_record(void *cls,
1414                 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
1415                 struct GNUNET_TIME_Absolute expiration,
1416                 const char *name,
1417                 unsigned int rd_count,
1418                 const struct GNUNET_NAMESTORE_RecordData *rd,
1419                 const struct GNUNET_CRYPTO_RsaSignature *signature)
1420 {
1421
1422   struct GNSNameRecordBlock *nrb;
1423   GNUNET_HashCode name_hash;
1424   GNUNET_HashCode xor_hash;
1425   struct GNUNET_CRYPTO_HashAsciiEncoded xor_hash_string;
1426   uint32_t rd_payload_length;
1427   char* nrb_data = NULL;
1428
1429   /* we're done */
1430   if (NULL == name)
1431   {
1432     GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Zone iteration finished\n");
1433     GNUNET_NAMESTORE_zone_iteration_stop (namestore_iter);
1434     zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_start,
1435                                                    NULL);
1436     return;
1437   }
1438
1439   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1440              "Putting records for %s into the DHT\n", name);
1441
1442   rd_payload_length = GNUNET_NAMESTORE_records_get_size (rd_count, rd);
1443
1444   nrb = GNUNET_malloc(rd_payload_length + strlen(name) + 1
1445                       + sizeof(struct GNSNameRecordBlock));
1446
1447   if (signature != NULL)
1448     nrb->signature = *signature;
1449
1450   nrb->public_key = *key;
1451
1452   nrb->rd_count = htonl(rd_count);
1453
1454   memset(&nrb[1], 0, strlen(name) + 1);
1455   memcpy(&nrb[1], name, strlen(name));
1456
1457   nrb_data = (char*)&nrb[1];
1458   nrb_data += strlen(name) + 1;
1459
1460   rd_payload_length += sizeof(struct GNSNameRecordBlock) +
1461     strlen(name) + 1;
1462
1463   if (-1 == GNUNET_NAMESTORE_records_serialize (rd_count,
1464                                                 rd,
1465                                                 rd_payload_length,
1466                                                 nrb_data))
1467   {
1468     GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Record serialization failed!\n");
1469     return;
1470     //FIXME what to do
1471   }
1472
1473
1474   /*
1475    * calculate DHT key: H(name) xor H(pubkey)
1476    */
1477   GNUNET_CRYPTO_hash(name, strlen(name), &name_hash);
1478   GNUNET_CRYPTO_hash_xor(&zone_hash, &name_hash, &xor_hash);
1479   GNUNET_CRYPTO_hash_to_enc (&xor_hash, &xor_hash_string);
1480   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1481              "putting records for %s under key: %s with size %d\n",
1482              name, (char*)&xor_hash_string, rd_payload_length);
1483
1484   GNUNET_DHT_put (dht_handle, &xor_hash,
1485                   DHT_GNS_REPLICATION_LEVEL,
1486                   GNUNET_DHT_RO_NONE,
1487                   GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
1488                   rd_payload_length,
1489                   (char*)nrb,
1490                   expiration,
1491                   DHT_OPERATION_TIMEOUT,
1492                   &record_dht_put,
1493                   NULL); //cls for cont
1494
1495   num_public_records++;
1496
1497   /**
1498    * Reschedule periodic put
1499    */
1500   zone_update_taskid = GNUNET_SCHEDULER_add_delayed (dht_update_interval,
1501                                 &update_zone_dht_next,
1502                                 NULL);
1503
1504 }
1505
1506 /**
1507  * Periodically iterate over our zone and store everything in dht
1508  *
1509  * @param cls NULL
1510  * @param tc task context
1511  */
1512 static void
1513 update_zone_dht_start(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1514 {
1515   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Starting DHT zone update!\n");
1516   if (0 == num_public_records)
1517   {
1518     dht_update_interval = GNUNET_TIME_relative_multiply(
1519                                                       GNUNET_TIME_UNIT_SECONDS,
1520                                                       1);
1521   }
1522   else
1523   {
1524     dht_update_interval = GNUNET_TIME_relative_multiply(
1525                                                       GNUNET_TIME_UNIT_SECONDS,
1526                                                      (3600/num_public_records));
1527   }
1528   num_public_records = 0; //start counting again
1529   namestore_iter = GNUNET_NAMESTORE_zone_iteration_start (namestore_handle,
1530                                                           &zone_hash,
1531                                                           GNUNET_NAMESTORE_RF_AUTHORITY,
1532                                                           GNUNET_NAMESTORE_RF_PRIVATE,
1533                                                           &put_gns_record,
1534                                                           NULL);
1535 }
1536
1537 //Prototype
1538 static void send_shorten_response(const char* name,
1539                                   struct ClientShortenHandle *csh);
1540 static void
1541 process_shorten_pseu_lookup_ns(void *cls,
1542                  const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
1543                  struct GNUNET_TIME_Absolute expire,
1544                  const char *name,
1545                  unsigned int rd_len,
1546                  const struct GNUNET_NAMESTORE_RecordData *rd,
1547                  const struct GNUNET_CRYPTO_RsaSignature *signature)
1548 {
1549   struct GNUNET_GNS_ResolverHandle *rh =
1550     (struct GNUNET_GNS_ResolverHandle *)cls;
1551   struct GNUNET_TIME_Relative remaining_time;
1552
1553
1554   rh->status = 0;
1555
1556   if (name != NULL)
1557   {
1558     rh->status |= EXISTS;
1559   }
1560
1561   if (remaining_time.rel_value == 0)
1562   {
1563     rh->status |= EXPIRED;
1564   }
1565
1566
1567
1568   rh->proc(cls, rh, rd_len, rd);
1569 }
1570
1571
1572 /**
1573  * Start DHT lookup for a PSEUdonym record in
1574  * rh->authority's zone
1575  *
1576  * @param rh the pending gns query
1577  * @param name the name of the PKEY record
1578  */
1579 static void
1580 resolve_pseu_from_dht(struct GNUNET_GNS_ResolverHandle *rh)
1581 {
1582   uint32_t xquery;
1583   GNUNET_HashCode name_hash;
1584   GNUNET_HashCode lookup_key;
1585
1586   //Empty string
1587   GNUNET_CRYPTO_hash("",
1588                      1,
1589                      &name_hash);
1590
1591   GNUNET_CRYPTO_hash_xor(&name_hash, &rh->authority, &lookup_key);
1592
1593   rh->dht_timeout_task = GNUNET_SCHEDULER_add_delayed (DHT_LOOKUP_TIMEOUT,
1594                                                   &dht_lookup_timeout,
1595                                                        rh);
1596
1597   xquery = htonl(GNUNET_GNS_RECORD_PSEU);
1598
1599   rh->get_handle = GNUNET_DHT_get_start(dht_handle,
1600                        DHT_OPERATION_TIMEOUT,
1601                        GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
1602                        &lookup_key,
1603                        DHT_GNS_REPLICATION_LEVEL,
1604                        GNUNET_DHT_RO_NONE,
1605                        &xquery,
1606                        sizeof(xquery),
1607                        &process_authority_dht_result,
1608                        rh);
1609
1610 }
1611
1612 //Prototype
1613 static void
1614 handle_shorten_pseu_ns_result(void* cls,
1615                               struct GNUNET_GNS_ResolverHandle *rh,
1616                               uint32_t rd_count,
1617                               const struct GNUNET_NAMESTORE_RecordData *rd);
1618
1619 static void
1620 handle_shorten_zone_to_name(void *cls,
1621                  const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
1622                  struct GNUNET_TIME_Absolute expire,
1623                  const char *name,
1624                  unsigned int rd_len,
1625                  const struct GNUNET_NAMESTORE_RecordData *rd,
1626                  const struct GNUNET_CRYPTO_RsaSignature *signature)
1627 {
1628   struct GNUNET_GNS_ResolverHandle *rh =
1629     (struct GNUNET_GNS_ResolverHandle *)cls;
1630   struct ClientShortenHandle* csh = (struct ClientShortenHandle*) rh->proc_cls;
1631
1632   char* result;
1633
1634   /* we found a match in our own zone */
1635   if (rd_len != 0)
1636   {
1637     result = GNUNET_malloc(strlen(rh->name) + strlen(name) + 1);
1638     memset(result, 0, strlen(rh->name) + strlen(name) + 1);
1639     memcpy(result, rh->name, strlen(rh->name));
1640     memcpy(result+strlen(rh->name)+1, name, strlen(name));
1641
1642     send_shorten_response(result, csh);
1643
1644     GNUNET_free(result);
1645   }
1646   else
1647   {
1648     /**
1649      * Nothing in our zone
1650      * check PSEU for this authority in namestore
1651      */
1652     rh->proc = &handle_shorten_pseu_ns_result;
1653     GNUNET_NAMESTORE_lookup_record(namestore_handle,
1654                                    &rh->authority_chain_head->zone,
1655                                    "",
1656                                    GNUNET_GNS_RECORD_PSEU,
1657                                    &process_shorten_pseu_lookup_ns,
1658                                    rh);
1659   }
1660 }
1661
1662 /**
1663  * Process result from namestore delegation lookup
1664  * for shorten operation
1665  *
1666  * @param cls the client shorten handle
1667  * @param rh the resolver handle
1668  * @param rd_count number of results (0)
1669  * @param rd data (NULL)
1670  */
1671 void
1672 handle_shorten_pseu_dht_result(void* cls,
1673                       struct GNUNET_GNS_ResolverHandle *rh,
1674                       uint32_t rd_len,
1675                       const struct GNUNET_NAMESTORE_RecordData *rd)
1676 {
1677   struct ClientShortenHandle* csh = (struct ClientShortenHandle*) cls;
1678   struct AuthorityChain *auth_chain;
1679   char* pseu;
1680   char* result;
1681   char* new_name;
1682   int i;
1683
1684   /**
1685    * PSEU found
1686    */
1687   if (rd_len != 0)
1688   {
1689     for (i=0; i < rd_len; i++)
1690     {
1691       if (rd[i].record_type == GNUNET_GNS_RECORD_PSEU)
1692         break;
1693     }
1694
1695     pseu = (char*) rd[i].data;
1696     result = GNUNET_malloc(strlen(rh->name) + strlen(pseu) + 1);
1697     memset(result, 0, strlen(rh->name) + strlen(pseu) + 1);
1698     memcpy(result, rh->name, strlen(rh->name));
1699     memcpy(result+strlen(rh->name)+1, pseu, strlen(pseu));
1700
1701     send_shorten_response(result, csh);
1702
1703     GNUNET_free(result);
1704     return;
1705   }
1706
1707   /**
1708    * No PSEU found.
1709    * continue with next authority
1710    * backtrack
1711    */
1712   auth_chain = rh->authority_chain_head;
1713
1714   if ((auth_chain->next->next == NULL) &&
1715       GNUNET_CRYPTO_hash_cmp(&auth_chain->next->zone, &zone_hash) == 0)
1716   {
1717     /**
1718      * Our zone is next
1719      */
1720     result = GNUNET_malloc(strlen(rh->name) + strlen(auth_chain->name) + 2);
1721     memset(result, 0, strlen(rh->name) + strlen(auth_chain->name) + 2);
1722     strcpy(result, rh->name);
1723     strcpy(result+strlen(rh->name)+1, ".");
1724     strcpy(result+strlen(rh->name)+2, auth_chain->name);
1725     send_shorten_response(result, csh);
1726
1727     return;
1728   }
1729
1730   /**
1731    * Continue with next authority
1732    */
1733   new_name = GNUNET_malloc(strlen(rh->name)+
1734                            strlen(auth_chain->name) + 2);
1735   memset(new_name, 0, strlen(rh->name)+
1736                       strlen(auth_chain->name) + 2);
1737   strcpy(new_name, rh->name);
1738   strcpy(new_name+strlen(rh->name)+1, ".");
1739   strcpy(new_name+strlen(rh->name)+2, auth_chain->name);
1740   GNUNET_CONTAINER_DLL_remove(rh->authority_chain_head,
1741                               rh->authority_chain_tail,
1742                               auth_chain);
1743
1744   GNUNET_NAMESTORE_zone_to_name (namestore_handle,
1745                                  &zone_hash,
1746                                  &rh->authority_chain_head->zone,
1747                                  &handle_shorten_zone_to_name,
1748                                  rh);
1749
1750 }
1751
1752
1753
1754 /**
1755  * Process result from namestore PSEU lookup
1756  * for shorten operation
1757  * FIXME do we need to check for own zone here?
1758  *
1759  * @param cls the client shorten handle
1760  * @param rh the resolver handle
1761  * @param rd_count number of results (0 if none found)
1762  * @param rd data (NULL if none found)
1763  */
1764 static void
1765 handle_shorten_pseu_ns_result(void* cls,
1766                       struct GNUNET_GNS_ResolverHandle *rh,
1767                       uint32_t rd_len,
1768                       const struct GNUNET_NAMESTORE_RecordData *rd)
1769 {
1770   struct ClientShortenHandle* csh = (struct ClientShortenHandle*) cls;
1771   struct AuthorityChain *auth_chain;
1772   char* pseu;
1773   char* result;
1774   char* new_name;
1775   int i;
1776
1777   /**
1778    * PSEU found
1779    */
1780   if (rd_len != 0)
1781   {
1782     for (i=0; i < rd_len; i++)
1783     {
1784       if (rd[i].record_type == GNUNET_GNS_RECORD_PSEU)
1785         break;
1786     }
1787
1788     pseu = (char*) rd[i].data;
1789     result = GNUNET_malloc(strlen(rh->name) + strlen(pseu) + 1);
1790     memset(result, 0, strlen(rh->name) + strlen(pseu) + 1);
1791     memcpy(result, rh->name, strlen(rh->name));
1792     memcpy(result+strlen(rh->name)+1, pseu, strlen(pseu));
1793
1794     send_shorten_response(result, csh);
1795
1796     GNUNET_free(result);
1797     return;
1798   }
1799
1800   /**
1801    * No PSEU found. Ask DHT if expired.
1802    * Else contunue with next authority
1803    */
1804   if (rh->status & (EXISTS | !EXPIRED))
1805   {
1806     /**
1807      * backtrack
1808      */
1809     auth_chain = rh->authority_chain_head;
1810     new_name = GNUNET_malloc(strlen(rh->name)+
1811                              strlen(auth_chain->name) + 2);
1812     memset(new_name, 0, strlen(rh->name)+
1813                         strlen(auth_chain->name) + 2);
1814     strcpy(new_name, rh->name);
1815     strcpy(new_name+strlen(rh->name)+1, ".");
1816     strcpy(new_name+strlen(rh->name)+2, auth_chain->name);
1817
1818     GNUNET_CONTAINER_DLL_remove(rh->authority_chain_head,
1819                                 rh->authority_chain_tail,
1820                                 auth_chain);
1821
1822     GNUNET_NAMESTORE_zone_to_name (namestore_handle,
1823                                    &zone_hash,
1824                                    &rh->authority_chain_head->zone,
1825                                    &handle_shorten_zone_to_name,
1826                                    rh);
1827     return;
1828   }
1829
1830   /**
1831    * Ask DHT
1832    */
1833   rh->authority = rh->authority_chain_head->zone;
1834   rh->proc = &handle_shorten_pseu_dht_result;
1835   resolve_pseu_from_dht(rh);
1836
1837 }
1838
1839
1840
1841 /**
1842  * Process result from namestore delegation lookup
1843  * for shorten operation
1844  *
1845  * @param cls the client shorten handle
1846  * @param rh the resolver handle
1847  * @param rd_count number of results (0)
1848  * @param rd data (NULL)
1849  */
1850 void
1851 handle_shorten_delegation_result(void* cls,
1852                       struct GNUNET_GNS_ResolverHandle *rh,
1853                       uint32_t rd_count,
1854                       const struct GNUNET_NAMESTORE_RecordData *rd)
1855 {
1856   struct ClientShortenHandle* csh = (struct ClientShortenHandle*) cls;
1857   struct AuthorityChain *auth_chain;
1858
1859   /**
1860    * At this point rh->name contains the part of the name
1861    * that we do not have a PKEY in our namestore to resolve.
1862    * The authority chain in the resolver handle is now
1863    * useful to backtrack if needed
1864    */
1865
1866   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1867              "PKEY resolved as far as possible in ns up to %s!\n", rh->name);
1868
1869   if (GNUNET_CRYPTO_hash_cmp(&rh->authority_chain_head->zone,
1870                              &zone_hash) == 0)
1871   {
1872     /**
1873      * This is our zone append .gnunet unless name is empty
1874      * (it shouldn't be, usually FIXME what happens if we
1875      * shorten to our zone to a "" record??)
1876      **/
1877     send_shorten_response(rh->name, csh); //FIXME +.gnunet!
1878     //FIXME free
1879     return;
1880   }
1881   csh->offset++; //FIXME needed?
1882   auth_chain = rh->authority_chain_head;
1883   /* backtrack authorities for pseu */
1884   GNUNET_NAMESTORE_zone_to_name (namestore_handle,
1885                                  &zone_hash, //ours
1886                                  &auth_chain->zone,
1887                                  &handle_shorten_zone_to_name,
1888                                  rh);
1889
1890 }
1891
1892 typedef void (*ShortenResponseProc) (void* cls, const char* name);
1893
1894 /**
1895  * Shorten a given name
1896  *
1897  * @param name the name to shorten
1898  * @param proc the processor to call when finished
1899  * @praram cls the closure to the processor
1900  */
1901 static void
1902 shorten_name(char* name, struct ClientShortenHandle* csh)
1903 {
1904
1905   struct GNUNET_GNS_ResolverHandle *rh;
1906
1907   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1908               "Starting resolution for %s (type=%d)!\n",
1909               name, GNUNET_GNS_RECORD_PKEY);
1910
1911   rh = GNUNET_malloc(sizeof (struct GNUNET_GNS_ResolverHandle));
1912   rh->authority = zone_hash;
1913
1914   rh->name = GNUNET_malloc(strlen(name)
1915                               - strlen(gnunet_tld) + 1);
1916   memset(rh->name, 0,
1917          strlen(name)-strlen(gnunet_tld) + 1);
1918   memcpy(rh->name, name,
1919          strlen(name)-strlen(gnunet_tld));
1920
1921   csh->name = GNUNET_malloc(strlen(name)
1922                             - strlen(gnunet_tld) + 1);
1923   memset(rh->name, 0,
1924          strlen(name)-strlen(gnunet_tld) + 1);
1925   memcpy(rh->name, name,
1926          strlen(name)-strlen(gnunet_tld));
1927
1928   rh->authority_name = GNUNET_malloc(sizeof(char)*MAX_DNS_LABEL_LENGTH);
1929
1930   rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
1931   rh->authority_chain_tail = rh->authority_chain_head;
1932   rh->authority_chain_head->zone = zone_hash;
1933   rh->proc = &handle_shorten_delegation_result;
1934   rh->proc_cls = (void*)csh;
1935
1936   /* Start delegation resolution in our namestore */
1937   resolve_delegation_from_ns(rh);
1938
1939 }
1940
1941 /**
1942  * Send shorten response back to client
1943  * FIXME this is without .gnunet!
1944  *
1945  * @param cls the client handle in closure
1946  * @param name the shortened name result or NULL if cannot be shortened
1947  */
1948 static void
1949 send_shorten_response(const char* name, struct ClientShortenHandle *csh)
1950 {
1951   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending `%s' message\n",
1952               "SHORTEN_RESULT");
1953   struct GNUNET_GNS_ClientShortenResultMessage *rmsg;
1954
1955   if (name == NULL)
1956   {
1957     name = '\0';
1958   }
1959
1960   rmsg = GNUNET_malloc(sizeof(struct GNUNET_GNS_ClientShortenResultMessage *)
1961                        + strlen(name));
1962
1963   rmsg->unique_id = csh->unique_id;
1964   rmsg->key = csh->key;
1965   rmsg->header.type = htons(GNUNET_MESSAGE_TYPE_GNS_SHORTEN_RESULT);
1966   rmsg->header.size =
1967     htons(sizeof(struct GNUNET_GNS_ClientShortenResultMessage *) +
1968           strlen(name));
1969
1970   strcpy((char*)&rmsg[1], name);
1971
1972   GNUNET_SERVER_notification_context_unicast (nc, csh->client,
1973                               (const struct GNUNET_MessageHeader *) &rmsg,
1974                               GNUNET_NO);
1975
1976   GNUNET_SERVER_receive_done (csh->client, GNUNET_OK);
1977
1978   GNUNET_free(csh);
1979   GNUNET_free(rmsg);
1980
1981 }
1982
1983 /**
1984  * Handle a shorten message from the api
1985  *
1986  * @param cls the closure
1987  * @param client the client
1988  * @param message the message
1989  */
1990 static void handle_shorten(void *cls,
1991                            struct GNUNET_SERVER_Client * client,
1992                            const struct GNUNET_MessageHeader * message)
1993 {
1994   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "SHORTEN");
1995
1996   size_t msg_size = 0;
1997   struct ClientShortenHandle *csh;
1998
1999   if (ntohs (message->size) != sizeof (struct GNUNET_GNS_ClientShortenMessage))
2000   {
2001     GNUNET_break_op (0);
2002     GNUNET_SERVER_receive_done (client, GNUNET_OK);
2003     return;
2004   }
2005
2006   struct GNUNET_GNS_ClientShortenMessage *sh_msg =
2007     (struct GNUNET_GNS_ClientShortenMessage *) message;
2008
2009   msg_size = ntohs(message->size);
2010
2011   if (msg_size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
2012   {
2013     GNUNET_break_op (0);
2014     GNUNET_SERVER_receive_done (client, GNUNET_OK);
2015     return;
2016   }
2017
2018   csh = GNUNET_malloc(sizeof(struct ClientShortenHandle));
2019   csh->client = client;
2020   csh->unique_id = sh_msg->unique_id;
2021   csh->key = sh_msg->key;
2022
2023   //Offset in original name
2024   csh->offset = 0;
2025
2026
2027   shorten_name((char*)&sh_msg[1], csh);
2028
2029 }
2030
2031 /**
2032  * TODO
2033  */
2034 static void
2035 handle_lookup(void *cls,
2036               struct GNUNET_SERVER_Client * client,
2037               const struct GNUNET_MessageHeader * message)
2038 {
2039 }
2040
2041 /**
2042  * Process GNS requests.
2043  *
2044  * @param cls closure)
2045  * @param server the initialized server
2046  * @param c configuration to use
2047  */
2048 static void
2049 run (void *cls, struct GNUNET_SERVER_Handle *server,
2050      const struct GNUNET_CONFIGURATION_Handle *c)
2051 {
2052
2053   GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Initializing GNS\n");
2054
2055   char* keyfile;
2056   struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
2057
2058   static const struct GNUNET_SERVER_MessageHandler handlers[] = {
2059     {&handle_shorten, NULL, GNUNET_MESSAGE_TYPE_GNS_SHORTEN, 0},
2060     {&handle_lookup, NULL, GNUNET_MESSAGE_TYPE_GNS_LOOKUP, 0}
2061   };
2062
2063   if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (c, "gns",
2064                                              "ZONEKEY", &keyfile))
2065   {
2066     GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2067                 "No private key for root zone specified%s!\n", keyfile);
2068     GNUNET_SCHEDULER_shutdown(0);
2069     return;
2070   }
2071
2072   zone_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
2073   GNUNET_CRYPTO_rsa_key_get_public (zone_key, &pkey);
2074
2075   GNUNET_CRYPTO_hash(&pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
2076                      &zone_hash);
2077
2078
2079   if (GNUNET_YES ==
2080       GNUNET_CONFIGURATION_get_value_yesno (c, "gns",
2081                                             "HIJACK_DNS"))
2082   {
2083     GNUNET_log(GNUNET_ERROR_TYPE_INFO,
2084                "DNS hijacking enabled... connecting to service.\n");
2085     /**
2086      * Do gnunet dns init here
2087      */
2088     dns_handle = GNUNET_DNS_connect(c,
2089                                     GNUNET_DNS_FLAG_PRE_RESOLUTION,
2090                                     &handle_dns_request, /* rh */
2091                                     NULL); /* Closure */
2092     if (NULL == dns_handle)
2093     {
2094       GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
2095                "Failed to connect to the dnsservice!\n");
2096     }
2097   }
2098
2099
2100
2101   /**
2102    * handle to our local namestore
2103    */
2104   namestore_handle = GNUNET_NAMESTORE_connect(c);
2105
2106   if (NULL == namestore_handle)
2107   {
2108     //FIXME do error handling;
2109     GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
2110                "Failed to connect to the namestore!\n");
2111     GNUNET_SCHEDULER_shutdown(0);
2112     return;
2113   }
2114
2115   /**
2116    * handle to the dht
2117    */
2118   dht_handle = GNUNET_DHT_connect(c, 1); //FIXME get ht_len from cfg
2119
2120   if (NULL == dht_handle)
2121   {
2122     GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Could not connect to DHT!\n");
2123   }
2124
2125   //put_some_records(); //FIXME for testing
2126
2127   /**
2128    * Schedule periodic put
2129    * for our records
2130    * We have roughly an hour for all records;
2131    */
2132   dht_update_interval = GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS,
2133                                                       1);
2134   //zone_update_taskid = GNUNET_SCHEDULER_add_now (&update_zone_dht_start, NULL);
2135
2136   GNUNET_SERVER_add_handlers (server, handlers);
2137
2138   //FIXME
2139   //GNUNET_SERVER_disconnect_notify (server,
2140   //                                 &client_disconnect_notification,
2141   //                                 NULL);
2142
2143   nc = GNUNET_SERVER_notification_context_create (server, 1);
2144
2145   GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
2146                                 NULL);
2147 }
2148
2149
2150 /**
2151  * The main function for the GNS service.
2152  *
2153  * @param argc number of arguments from the command line
2154  * @param argv command line arguments
2155  * @return 0 ok, 1 on error
2156  */
2157 int
2158 main (int argc, char *const *argv)
2159 {
2160   int ret;
2161
2162   ret =
2163       (GNUNET_OK ==
2164        GNUNET_SERVICE_run (argc, argv, "gns", GNUNET_SERVICE_OPTION_NONE, &run,
2165                            NULL)) ? 0 : 1;
2166   return ret;
2167 }
2168
2169 /* end of gnunet-service-gns.c */