#include "gns.h"
#include "gnunet-service-gns_resolver.h"
-#define DHT_OPERATION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3)
#define DHT_LOOKUP_TIMEOUT DHT_OPERATION_TIMEOUT
#define DHT_GNS_REPLICATION_LEVEL 5
#define MAX_DNS_LABEL_LENGTH 63
/**
* Our handle to the namestore service
*/
-struct GNUNET_NAMESTORE_Handle *namestore_handle;
+static struct GNUNET_NAMESTORE_Handle *namestore_handle;
/**
* Resolver handle to the dht
*/
-struct GNUNET_DHT_Handle *dht_handle;
+static struct GNUNET_DHT_Handle *dht_handle;
/**
- * Connects resolver to the dht
+ * Heap for parallel DHT lookups
+ */
+static struct GNUNET_CONTAINER_Heap *dht_lookup_heap;
+
+/**
+ * Maximum amount of parallel queries in background
+ */
+static unsigned long long max_allowed_background_queries;
+
+/**
+ * Wheather or not to ignore pending records
+ */
+static int ignore_pending_records;
+
+/**
+ * Our local zone
+ */
+static struct GNUNET_CRYPTO_ShortHashCode local_zone;
+
+/**
+ * a resolution identifier pool variable
+ * FIXME overflow?
+ * This is a non critical identifier useful for debugging
+ */
+static unsigned long long rid = 0;
+
+/**
+ * Namestore calls this function if we have record for this name.
+ * (or with rd_count=0 to indicate no matches)
+ *
+ * @param cls the pending query
+ * @param key the key of the zone we did the lookup
+ * @param expiration expiration date of the namestore entry
+ * @param name the name for which we need an authority
+ * @param rd_count the number of records with 'name'
+ * @param rd the record data
+ * @param signature the signature of the authority for the record data
+ */
+static void
+process_pseu_lookup_ns(void* cls,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
+ struct GNUNET_TIME_Absolute expiration,
+ const char *name, unsigned int rd_count,
+ const struct GNUNET_NAMESTORE_RecordData *rd,
+ const struct GNUNET_CRYPTO_RsaSignature *signature)
+{
+ struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
+ struct GNUNET_NAMESTORE_RecordData new_pkey;
+
+ if (rd_count > 0)
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_AUTO_PSEU: Name %s already taken in NS!\n", name);
+ if (0 == strcmp(gph->name, name))
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_AUTO_PSEU: Intelligent replacement not implemented\n",
+ name);
+ GNUNET_free(gph);
+ return;
+ }
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_AUTO_PSEU: Trying delegated name %s\n", gph->name);
+ memcpy(gph->new_name, gph->name, strlen(gph->name)+1);
+ GNUNET_NAMESTORE_lookup_record(namestore_handle,
+ &gph->zone,
+ gph->new_name,
+ GNUNET_NAMESTORE_TYPE_ANY,
+ &process_pseu_lookup_ns,
+ gph);
+ return;
+ }
+
+ /** name is free */
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_AUTO_PSEU: Name %s not taken in NS! Adding\n", gph->new_name);
+
+ new_pkey.expiration = GNUNET_TIME_absolute_get_forever ();
+ new_pkey.data_size = sizeof(struct GNUNET_CRYPTO_ShortHashCode);
+ new_pkey.data = &gph->new_zone;
+ new_pkey.record_type = GNUNET_GNS_RECORD_PKEY;
+ new_pkey.flags = GNUNET_NAMESTORE_RF_AUTHORITY
+ | GNUNET_NAMESTORE_RF_PRIVATE
+ | GNUNET_NAMESTORE_RF_PENDING;
+ GNUNET_NAMESTORE_record_create (namestore_handle,
+ gph->key,
+ gph->new_name,
+ &new_pkey,
+ NULL, //cont
+ NULL); //cls
+ GNUNET_free(gph);
+
+}
+
+/**
+ * process result of a dht pseu lookup
+ *
+ * @param gph the handle
+ * @param name the pseu result or NULL
+ */
+static void
+process_pseu_result(struct GetPseuAuthorityHandle* gph, char* name)
+{
+ if (NULL == name)
+ {
+ memcpy(gph->new_name, gph->name, strlen(gph->name)+1);
+ }
+ else
+ {
+ memcpy(gph->new_name, name, strlen(name)+1);
+ }
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_AUTO_PSEU: Checking %s for collision in NS\n", gph->new_name);
+
+ /**
+ * Check for collision
+ */
+ GNUNET_NAMESTORE_lookup_record(namestore_handle,
+ &gph->zone,
+ gph->new_name,
+ GNUNET_NAMESTORE_TYPE_ANY,
+ &process_pseu_lookup_ns,
+ gph);
+}
+
+/**
+ * Handle timeout for dht request
+ *
+ * @param cls the request handle as closure
+ * @param tc the task context
+ */
+static void
+handle_auth_discovery_timeout(void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_GET_AUTH: dht lookup for query PSEU timed out.\n");
+ GNUNET_DHT_get_stop (gph->get_handle);
+ gph->get_handle = NULL;
+ process_pseu_result(gph, NULL);
+}
+
+/**
+ * Function called when we find a PSEU entry in the DHT
+ *
+ * @param cls the request handle
+ * @param exp lifetime
+ * @param key the key the record was stored under
+ * @param get_path get path
+ * @param get_path_length get path length
+ * @param put_path put path
+ * @param put_path_length put path length
+ * @param type the block type
+ * @param size the size of the record
+ * @param data the record data
+ */
+static void
+process_auth_discovery_dht_result(void* cls,
+ struct GNUNET_TIME_Absolute exp,
+ const GNUNET_HashCode * key,
+ const struct GNUNET_PeerIdentity *get_path,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ unsigned int put_path_length,
+ enum GNUNET_BLOCK_Type type,
+ size_t size, const void *data)
+{
+ struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
+ struct GNSNameRecordBlock *nrb;
+ char* rd_data = (char*)data;
+ char* name;
+ int num_records;
+ size_t rd_size;
+ int i;
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_GET_AUTH: got dht result (size=%d)\n", size);
+
+ if (data == NULL)
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
+ "GNS_GET_AUTH: got dht result null!\n", size);
+ GNUNET_break(0);
+ GNUNET_free(gph);
+ return;
+ }
+
+ nrb = (struct GNSNameRecordBlock*)data;
+
+ /* stop lookup and timeout task */
+ GNUNET_DHT_get_stop (gph->get_handle);
+ gph->get_handle = NULL;
+ GNUNET_SCHEDULER_cancel(gph->timeout);
+
+ gph->get_handle = NULL;
+
+ nrb = (struct GNSNameRecordBlock*)data;
+
+ name = (char*)&nrb[1];
+ num_records = ntohl(nrb->rd_count);
+ {
+ struct GNUNET_NAMESTORE_RecordData rd[num_records];
+
+ rd_data += strlen(name) + 1 + sizeof(struct GNSNameRecordBlock);
+ rd_size = size - strlen(name) - 1 - sizeof(struct GNSNameRecordBlock);
+
+ if (GNUNET_SYSERR == GNUNET_NAMESTORE_records_deserialize (rd_size,
+ rd_data,
+ num_records,
+ rd))
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
+ "GNS_GET_AUTH: Error deserializing data!\n");
+ GNUNET_break(0);
+ GNUNET_free(gph);
+ return;
+ }
+
+ for (i=0; i<num_records; i++)
+ {
+ if ((strcmp(name, "+") == 0) &&
+ (rd[i].record_type == GNUNET_GNS_RECORD_PSEU))
+ {
+ /* found pseu */
+ process_pseu_result(gph, (char*)rd[i].data);
+ return;
+ }
+ }
+ }
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "GNS_GET_AUTH: no pseu in dht!\n");
+ process_pseu_result(gph, NULL);
+}
+
+static void
+process_auth_discovery_ns_result(void* cls,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *key,
+ struct GNUNET_TIME_Absolute expiration,
+ const char *name, unsigned int rd_count,
+ const struct GNUNET_NAMESTORE_RecordData *rd,
+ const struct GNUNET_CRYPTO_RsaSignature *signature)
+{
+ uint32_t xquery;
+ struct GNUNET_CRYPTO_ShortHashCode name_hash;
+ GNUNET_HashCode lookup_key;
+ struct GNUNET_CRYPTO_HashAsciiEncoded lookup_key_string;
+ GNUNET_HashCode name_hash_double;
+ GNUNET_HashCode zone_hash_double;
+ int i;
+ struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
+
+ /* no pseu found */
+ if (rd_count == 0)
+ {
+ /**
+ * check dht
+ */
+ GNUNET_CRYPTO_short_hash("+", strlen("+"), &name_hash);
+ GNUNET_CRYPTO_short_hash_double (&name_hash, &name_hash_double);
+ GNUNET_CRYPTO_short_hash_double (&gph->new_zone, &zone_hash_double);
+ GNUNET_CRYPTO_hash_xor(&name_hash_double, &zone_hash_double, &lookup_key);
+ GNUNET_CRYPTO_hash_to_enc (&lookup_key, &lookup_key_string);
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_AUTO_PSEU: starting dht lookup for %s with key: %s\n",
+ "+", (char*)&lookup_key_string);
+
+ gph->timeout = GNUNET_SCHEDULER_add_delayed(DHT_LOOKUP_TIMEOUT,
+ &handle_auth_discovery_timeout, gph);
+
+ xquery = htonl(GNUNET_GNS_RECORD_PSEU);
+
+ GNUNET_assert(gph->get_handle == NULL);
+ gph->get_handle = GNUNET_DHT_get_start(dht_handle,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
+ &lookup_key,
+ DHT_GNS_REPLICATION_LEVEL,
+ GNUNET_DHT_RO_NONE,
+ &xquery,
+ sizeof(xquery),
+ &process_auth_discovery_dht_result,
+ gph);
+ return;
+ }
+ for (i=0; i<rd_count; i++)
+ {
+ if ((strcmp(name, "+") == 0) &&
+ (rd[i].record_type == GNUNET_GNS_RECORD_PSEU))
+ {
+ /* found pseu */
+ process_pseu_result(gph, (char*)rd[i].data);
+ return;
+ }
+ }
+}
+
+/**
+ * Callback called by namestore for a zone to name
+ * result
+ *
+ * @param cls the closure
+ * @param zone_key the zone we queried
+ * @param expire the expiration time of the name
+ * @param name the name found or NULL
+ * @param rd_len number of records for the name
+ * @param rd the record data (PKEY) for the name
+ * @param signature the signature for the record data
*/
static void
-connect_to_dht()
+process_zone_to_name_discover(void *cls,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
+ struct GNUNET_TIME_Absolute expire,
+ const char *name,
+ unsigned int rd_len,
+ const struct GNUNET_NAMESTORE_RecordData *rd,
+ const struct GNUNET_CRYPTO_RsaSignature *signature)
+{
+ struct GetPseuAuthorityHandle* gph = (struct GetPseuAuthorityHandle*)cls;
+
+ /* we found a match in our own zone */
+ if (rd_len != 0)
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_AUTO_PSEU: name for zone in our root %s\n", name);
+ GNUNET_free(gph);
+ }
+ else
+ {
+
+ GNUNET_NAMESTORE_lookup_record(namestore_handle,
+ &gph->new_zone,
+ "+",
+ GNUNET_GNS_RECORD_PSEU,
+ &process_auth_discovery_ns_result,
+ gph);
+ }
+
+
+}
+
+
+/**
+ * Callback for new authories
+ *
+ * @param name the name given by delegation
+ * @param zone the authority
+ * @param our_zone our local zone
+ * @param key the private key of our authority
+ */
+static void process_discovered_authority(char* name,
+ struct GNUNET_CRYPTO_ShortHashCode zone,
+ struct GNUNET_CRYPTO_ShortHashCode our_zone,
+ struct GNUNET_CRYPTO_RsaPrivateKey *key)
+{
+ struct GetPseuAuthorityHandle *gph;
+ size_t namelen;
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_AUTO_PSEU: New authority %s discovered\n",
+ name);
+
+ gph = GNUNET_malloc(sizeof(struct GetPseuAuthorityHandle));
+ namelen = strlen(name) + 1;
+ memcpy(gph->name, name, namelen);
+
+ gph->new_zone = zone;
+ gph->zone = our_zone;
+ gph->key = key;
+
+ GNUNET_NAMESTORE_zone_to_name (namestore_handle,
+ &our_zone,
+ &gph->new_zone,
+ &process_zone_to_name_discover,
+ gph);
+
+}
+
+/**
+ * Initialize the resolver
+ *
+ * @param nh the namestore handle
+ * @param dh the dht handle
+ * @param lz the local zone's hash
+ * @param max_bg_queries maximum number of parallel background queries in dht
+ * @param ignore_pending ignore records that still require user confirmation
+ * on lookup
+ * @return GNUNET_OK on success
+ */
+int
+gns_resolver_init(struct GNUNET_NAMESTORE_Handle *nh,
+ struct GNUNET_DHT_Handle *dh,
+ struct GNUNET_CRYPTO_ShortHashCode lz,
+ unsigned long long max_bg_queries,
+ int ignore_pending)
+{
+ namestore_handle = nh;
+ dht_handle = dh;
+ local_zone = lz;
+ dht_lookup_heap =
+ GNUNET_CONTAINER_heap_create(GNUNET_CONTAINER_HEAP_ORDER_MIN);
+ max_allowed_background_queries = max_bg_queries;
+ ignore_pending_records = ignore_pending;
+
+ if ((namestore_handle != NULL) && (dht_handle != NULL))
+ {
+ return GNUNET_OK;
+ }
+ return GNUNET_SYSERR;
+}
+
+/**
+ * Cleanup background lookups
+ *
+ * @param cls closure to iterator
+ * @param node heap nodes
+ * @param element the resolver handle
+ * @param cost heap cost
+ * @return always GNUNET_YES
+ */
+static int
+cleanup_pending_background_queries(void* cls,
+ struct GNUNET_CONTAINER_HeapNode *node,
+ void *element,
+ GNUNET_CONTAINER_HeapCostType cost)
{
- //FIXME
+ struct ResolverHandle *rh = (struct ResolverHandle *)element;
+ ResolverCleanupContinuation cont = cls;
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_CLEANUP-%llu: Terminating background lookup for %s\n",
+ rh->id, rh->name);
+ GNUNET_DHT_get_stop(rh->get_handle);
+ rh->get_handle = NULL;
+ rh->proc(rh->proc_cls, rh, 0, NULL);
+
+ GNUNET_CONTAINER_heap_remove_node(node);
+
+ if (GNUNET_CONTAINER_heap_get_size(dht_lookup_heap) == 0)
+ cont();
+
+
+ return GNUNET_YES;
}
+
+/**
+ * Shutdown resolver
+ */
+void
+gns_resolver_cleanup(ResolverCleanupContinuation cont)
+{
+ unsigned int s = GNUNET_CONTAINER_heap_get_size(dht_lookup_heap);
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_CLEANUP: %d pending background queries to terminate\n", s);
+
+ if (0 != s)
+ GNUNET_CONTAINER_heap_iterate (dht_lookup_heap,
+ &cleanup_pending_background_queries,
+ cont);
+ else
+ cont();
+}
+
+
/**
* Helper function to free resolver handle
*
- * @rh the handle to free
+ * @param rh the handle to free
*/
static void
free_resolver_handle(struct ResolverHandle* rh)
if (NULL == rh)
return;
- GNUNET_free_non_null (rh->name);
- GNUNET_free_non_null (rh->authority_name);
-
ac = rh->authority_chain_head;
while (NULL != ac)
{
ac_next = ac->next;
- GNUNET_free_non_null (ac->name);
GNUNET_free(ac);
ac = ac_next;
}
{
if (GNUNET_NO == success)
{
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "records already in namestore\n");
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_NS: records already in namestore\n");
return;
}
else if (GNUNET_YES == success)
{
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "records successfully put in namestore\n");
+ "GNS_NS: records successfully put in namestore\n");
return;
}
GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
- "Error putting records into namestore: %s\n", emsg);
+ "GNS_NS: Error putting records into namestore: %s\n", emsg);
}
+static void
+handle_lookup_timeout(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct ResolverHandle *rh = cls;
+
+ if (rh->timeout_cont)
+ rh->timeout_cont(rh->timeout_cont_cls, tc);
+}
+
+/**
+ * Processor for background lookups in the DHT
+ *
+ * @param cls closure (NULL)
+ * @param rd_count number of records found (not 0)
+ * @param rd record data
+ */
+static void
+background_lookup_result_processor(void *cls,
+ uint32_t rd_count,
+ const struct GNUNET_NAMESTORE_RecordData *rd)
+{
+ //We could do sth verbose/more useful here but it doesn't make any difference
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_BG: background dht lookup for finished. (%d results)\n",
+ rd_count);
+}
/**
* Handle timeout for DHT requests
dht_lookup_timeout(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct ResolverHandle *rh = cls;
+ struct RecordLookupHandle *rlh = (struct RecordLookupHandle *)rh->proc_cls;
+ char new_name[MAX_DNS_NAME_LENGTH];
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "dht lookup for query %s timed out.\n",
- rh->name);
+ "GNS_PHASE_REC-%d: dht lookup for query %s (%ds)timed out.\n",
+ rh->id, rh->name, rh->timeout.rel_value);
+ /**
+ * Start resolution in bg
+ */
+ //strcpy(new_name, rh->name);
+ //memcpy(new_name+strlen(new_name), GNUNET_GNS_TLD, strlen(GNUNET_GNS_TLD));
+ GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
+ rh->name, GNUNET_GNS_TLD);
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_REC-%d: Starting background lookup for %s type %d\n",
+ rh->id, new_name, rlh->record_type);
+
+ gns_resolver_lookup_record(rh->authority,
+ rlh->record_type,
+ new_name,
+ rh->priv_key,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &background_lookup_result_processor,
+ NULL);
+ rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+
GNUNET_DHT_get_stop (rh->get_handle);
+ rh->get_handle = NULL;
rh->proc(rh->proc_cls, rh, 0, NULL);
}
char* rd_data = (char*)data;
int i;
int rd_size;
-
- GNUNET_HashCode zone, name_hash;
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "got dht result (size=%d)\n", size);
+
+ rh = (struct ResolverHandle *)cls;
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_REC-%d: got dht result (size=%d)\n", rh->id, size);
if (data == NULL)
return;
//FIXME maybe check expiration here, check block type
- rh = (struct ResolverHandle *)cls;
+
rlh = (struct RecordLookupHandle *) rh->proc_cls;
nrb = (struct GNSNameRecordBlock*)data;
/* stop lookup and timeout task */
GNUNET_DHT_get_stop (rh->get_handle);
- GNUNET_SCHEDULER_cancel(rh->dht_timeout_task);
+ rh->get_handle = NULL;
+
+ if (rh->dht_heap_node != NULL)
+ {
+ GNUNET_CONTAINER_heap_remove_node(rh->dht_heap_node);
+ rh->dht_heap_node = NULL;
+ }
+ if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel(rh->timeout_task);
+ rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+
rh->get_handle = NULL;
name = (char*)&nrb[1];
num_records = ntohl(nrb->rd_count);
num_records,
rd))
{
- GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Error deserializing data!\n");
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
+ "GNS_PHASE_REC-%d: Error deserializing data!\n", rh->id);
return;
}
for (i=0; i<num_records; i++)
{
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Got name: %s (wanted %s)\n", name, rh->name);
+ "GNS_PHASE_REC-%d: Got name: %s (wanted %s)\n",
+ rh->id, name, rh->name);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Got type: %d\n",
- rd[i].record_type);
+ "GNS_PHASE_REC-%d: Got type: %d\n",
+ rh->id, rd[i].record_type);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Got data length: %d\n", rd[i].data_size);
+ "GNS_PHASE_REC-%d: Got data length: %d\n",
+ rh->id, rd[i].data_size);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Got flag %d\n", rd[i].flags);
+ "GNS_PHASE_REC-%d: Got flag %d\n",
+ rh->id, rd[i].flags);
if ((strcmp(name, rh->name) == 0) &&
(rd[i].record_type == rlh->record_type))
}
- GNUNET_CRYPTO_hash(name, strlen(name), &name_hash);
- GNUNET_CRYPTO_hash_xor(key, &name_hash, &zone);
-
/**
* FIXME check pubkey against existing key in namestore?
* https://gnunet.org/bugs/view.php?id=2179
&nrb->signature,
&on_namestore_record_put_result, //cont
NULL); //cls
+
if (rh->answered)
rh->proc(rh->proc_cls, rh, num_records, rd);
resolve_record_dht(struct ResolverHandle *rh)
{
uint32_t xquery;
- GNUNET_HashCode name_hash;
+ struct GNUNET_CRYPTO_ShortHashCode name_hash;
GNUNET_HashCode lookup_key;
+ GNUNET_HashCode name_hash_double;
+ GNUNET_HashCode zone_hash_double;
struct GNUNET_CRYPTO_HashAsciiEncoded lookup_key_string;
struct RecordLookupHandle *rlh = (struct RecordLookupHandle *)rh->proc_cls;
-
- GNUNET_CRYPTO_hash(rh->name, strlen(rh->name), &name_hash);
- GNUNET_CRYPTO_hash_xor(&name_hash, &rh->authority, &lookup_key);
+ struct ResolverHandle *rh_heap_root;
+
+ GNUNET_CRYPTO_short_hash(rh->name, strlen(rh->name), &name_hash);
+ GNUNET_CRYPTO_short_hash_double(&name_hash, &name_hash_double);
+ GNUNET_CRYPTO_short_hash_double(&rh->authority, &zone_hash_double);
+ GNUNET_CRYPTO_hash_xor(&name_hash_double, &zone_hash_double, &lookup_key);
GNUNET_CRYPTO_hash_to_enc (&lookup_key, &lookup_key_string);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "starting dht lookup for %s with key: %s\n",
- rh->name, (char*)&lookup_key_string);
+ "GNS_PHASE_REC-%d: starting dht lookup for %s with key: %s\n",
+ rh->id, rh->name, (char*)&lookup_key_string);
- rh->dht_timeout_task = GNUNET_SCHEDULER_add_delayed(DHT_LOOKUP_TIMEOUT,
- &dht_lookup_timeout, rh);
+ //rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ rh->dht_heap_node = NULL;
+ if (rh->timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
+ {
+ /**
+ * Update timeout if necessary
+ */
+ if (rh->timeout_task == GNUNET_SCHEDULER_NO_TASK)
+ {
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_REC-%d: Adjusting timeout\n", rh->id);
+ /*
+ * Set timeout for authority lookup phase to 1/2
+ */
+ rh->timeout_task = GNUNET_SCHEDULER_add_delayed(
+ GNUNET_TIME_relative_divide(rh->timeout, 2),
+ &handle_lookup_timeout,
+ rh);
+ }
+ //rh->timeout_task = GNUNET_SCHEDULER_add_delayed (DHT_LOOKUP_TIMEOUT,
+ // &dht_lookup_timeout,
+ // rh);
+ rh->timeout_cont = &dht_lookup_timeout;
+ rh->timeout_cont_cls = rh;
+ }
+ else
+ {
+ if (max_allowed_background_queries <=
+ GNUNET_CONTAINER_heap_get_size (dht_lookup_heap))
+ {
+ rh_heap_root = GNUNET_CONTAINER_heap_remove_root (dht_lookup_heap);
+ GNUNET_DHT_get_stop(rh_heap_root->get_handle);
+ rh_heap_root->get_handle = NULL;
+ rh_heap_root->dht_heap_node = NULL;
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_REC-%d: Replacing oldest background query for %s\n",
+ rh->id, rh_heap_root->name);
+ rh_heap_root->proc(rh_heap_root->proc_cls,
+ rh_heap_root,
+ 0,
+ NULL);
+ }
+ rh->dht_heap_node = GNUNET_CONTAINER_heap_insert (dht_lookup_heap,
+ rh,
+ GNUNET_TIME_absolute_get().abs_value);
+ }
+
xquery = htonl(rlh->record_type);
+
+ GNUNET_assert(rh->get_handle == NULL);
rh->get_handle = GNUNET_DHT_get_start(dht_handle,
- DHT_OPERATION_TIMEOUT,
+ GNUNET_TIME_UNIT_FOREVER_REL,
GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
&lookup_key,
DHT_GNS_REPLICATION_LEVEL,
struct ResolverHandle *rh;
struct RecordLookupHandle *rlh;
struct GNUNET_TIME_Relative remaining_time;
- GNUNET_HashCode zone;
+ struct GNUNET_CRYPTO_ShortHashCode zone;
rh = (struct ResolverHandle *) cls;
rlh = (struct RecordLookupHandle *)rh->proc_cls;
- GNUNET_CRYPTO_hash(key,
+ GNUNET_CRYPTO_short_hash(key,
sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
&zone);
remaining_time = GNUNET_TIME_absolute_get_remaining (expiration);
+
+
rh->status = 0;
if (name != NULL)
{
- rh->status |= EXISTS;
+ rh->status |= RSL_RECORD_EXISTS;
}
if (remaining_time.rel_value == 0)
{
- rh->status |= EXPIRED;
+ rh->status |= RSL_RECORD_EXPIRED;
}
if (rd_count == 0)
* Lookup terminated and no results
*/
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Namestore lookup for %s terminated without results\n", name);
+ "GNS_PHASE_REC-%d: Namestore lookup for %s terminated without results\n",
+ rh->id, name);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Record %s unknown in namestore\n",
- rh->name);
+ "GNS_PHASE_REC-%d: Record %s unknown in namestore\n",
+ rh->id, rh->name);
/**
* Our zone and no result? Cannot resolve TT
*/
{
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Processing additional result %s from namestore\n", name);
+ "GNS_PHASE_REC-%d: Processing additional result %s from namestore\n",
+ rh->id, name);
int i;
for (i=0; i<rd_count;i++)
{
-
+
if (rd[i].record_type != rlh->record_type)
continue;
+
+ if (ignore_pending_records &&
+ (rd[i].flags & GNUNET_NAMESTORE_RF_PENDING))
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_REC-%d: Record %s is awaiting user confirmation. Skipping\n",
+ rh->id, name);
+ continue;
+ }
if ((GNUNET_TIME_absolute_get_remaining (rd[i].expiration)).rel_value
== 0)
{
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "This record is expired. Skipping\n");
+ "GNS_PHASE_REC-%d: This record is expired. Skipping\n",
+ rh->id);
continue;
}
if (rh->answered == 0)
{
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "No answers found. This is odd!\n");
+ "GNS_PHASE_REC-%d: No answers found. This is odd!\n", rh->id);
rh->proc(rh->proc_cls, rh, 0, NULL);
return;
}
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Found %d answer(s) to query!\n",
- rh->answered);
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_REC-%d: Found %d answer(s) to query in %d records!\n",
+ rh->id, rh->answered, rd_count);
rh->proc(rh->proc_cls, rh, rd_count, rd);
}
{
struct RecordLookupHandle *rlh = (struct RecordLookupHandle *)rh->proc_cls;
+ /* We cancel here as to not include the ns lookup in the timeout */
+ if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel(rh->timeout_task);
+ rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+
/**
* Try to resolve this record in our namestore.
* The name to resolve is now in rh->authority_name
}
+
/**
* Handle timeout for DHT requests
*
const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct ResolverHandle *rh = cls;
+ struct RecordLookupHandle *rlh = rh->proc_cls;
+ char new_name[MAX_DNS_NAME_LENGTH];
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "dht lookup for query %s timed out.\n",
- rh->name);
+ "GNS_PHASE_DELEGATE_DHT-%llu: dht lookup for query %s (%ds)timed out.\n",
+ rh->id, rh->authority_name, rh->timeout.rel_value);
+
+ rh->status |= RSL_TIMED_OUT;
+ rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+
GNUNET_DHT_get_stop (rh->get_handle);
+ rh->get_handle = NULL;
+
if (strcmp(rh->name, "") == 0)
{
/*
* promote authority back to name and try to resolve record
*/
strcpy(rh->name, rh->authority_name);
+ rh->proc(rh->proc_cls, rh, 0, NULL);
+ return;
}
+
+ /**
+ * Start resolution in bg
+ */
+ GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH,
+ "%s.%s.%s", rh->name, rh->authority_name, GNUNET_GNS_TLD);
+ //strcpy(new_name, rh->name);
+ //strcpy(new_name+strlen(new_name), ".");
+ //memcpy(new_name+strlen(new_name), GNUNET_GNS_TLD, strlen(GNUNET_GNS_TLD));
+
+ strcpy(rh->name, new_name);
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_DHT-%llu: Starting background query for %s type %d\n",
+ rh->id, rh->name, rlh->record_type);
+
+ gns_resolver_lookup_record(rh->authority,
+ rlh->record_type,
+ new_name,
+ rh->priv_key,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &background_lookup_result_processor,
+ NULL);
+
rh->proc(rh->proc_cls, rh, 0, NULL);
}
/* Prototype */
static void resolve_delegation_dht(struct ResolverHandle *rh);
+/* Prototype */
+static void resolve_delegation_ns(struct ResolverHandle *rh);
+
+
+/**
+ * Namestore resolution for delegation finished. Processing result.
+ *
+ * @param cls the closure
+ * @param rh resolver handle
+ * @param rd_count number of results (always 0)
+ * @param rd record data (always NULL)
+ */
+static void
+handle_delegation_ns(void* cls, struct ResolverHandle *rh,
+ unsigned int rd_count,
+ const struct GNUNET_NAMESTORE_RecordData *rd);
+
+
/**
* Function called when we get a result from the dht
* for our query. Recursively tries to resolve authorities
char* rd_data = (char*) data;
int i;
int rd_size;
- GNUNET_HashCode zone, name_hash;
+ struct GNUNET_CRYPTO_ShortHashCode zone, name_hash;
+ GNUNET_HashCode zone_hash_double, name_hash_double;
+
+ rh = (struct ResolverHandle *)cls;
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Got DHT result\n");
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_DHT-%llu: Got DHT result\n", rh->id);
if (data == NULL)
return;
- //FIXME check expiration?
-
- rh = (struct ResolverHandle *)cls;
nrb = (struct GNSNameRecordBlock*)data;
/* stop dht lookup and timeout task */
GNUNET_DHT_get_stop (rh->get_handle);
- GNUNET_SCHEDULER_cancel(rh->dht_timeout_task);
rh->get_handle = NULL;
+
+ if (rh->dht_heap_node != NULL)
+ {
+ GNUNET_CONTAINER_heap_remove_node(rh->dht_heap_node);
+ rh->dht_heap_node = NULL;
+ }
+
num_records = ntohl(nrb->rd_count);
name = (char*)&nrb[1];
{
num_records,
rd))
{
- GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "Error deserializing data!\n");
+ GNUNET_log(GNUNET_ERROR_TYPE_ERROR,
+ "GNS_PHASE_DELEGATE_DHT-%llu: Error deserializing data!\n",
+ rh->id);
return;
}
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Got name: %s (wanted %s)\n", name, rh->authority_name);
+ "GNS_PHASE_DELEGATE_DHT-%llu: Got name: %s (wanted %s)\n",
+ rh->id, name, rh->authority_name);
for (i=0; i<num_records; i++)
{
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Got name: %s (wanted %s)\n", name, rh->authority_name);
+ "GNS_PHASE_DELEGATE_DHT-%llu: Got name: %s (wanted %s)\n",
+ rh->id, name, rh->authority_name);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Got type: %d (wanted %d)\n",
- rd[i].record_type, GNUNET_GNS_RECORD_PKEY);
+ "GNS_PHASE_DELEGATE_DHT-%llu: Got type: %d (wanted %d)\n",
+ rh->id, rd[i].record_type, GNUNET_GNS_RECORD_PKEY);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Got data length: %d\n", rd[i].data_size);
+ "GNS_PHASE_DELEGATE_DHT-%llu: Got data length: %d\n",
+ rh->id, rd[i].data_size);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Got flag %d\n", rd[i].flags);
+ "GNS_PHASE_DELEGATE_DHT-%llu: Got flag %d\n",
+ rh->id, rd[i].flags);
if ((strcmp(name, rh->authority_name) == 0) &&
(rd[i].record_type == GNUNET_GNS_RECORD_PKEY))
{
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Authority found in DHT\n");
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_DHT-%llu: Authority found in DHT\n",
+ rh->id);
rh->answered = 1;
- memcpy(&rh->authority, rd[i].data, sizeof(GNUNET_HashCode));
+ memcpy(&rh->authority, rd[i].data, sizeof(struct GNUNET_CRYPTO_ShortHashCode));
struct AuthorityChain *auth =
GNUNET_malloc(sizeof(struct AuthorityChain));
auth->zone = rh->authority;
- auth->name = GNUNET_malloc(strlen(rh->authority_name)+1);
memset(auth->name, 0, strlen(rh->authority_name)+1);
strcpy(auth->name, rh->authority_name);
GNUNET_CONTAINER_DLL_insert (rh->authority_chain_head,
rh->authority_chain_tail,
auth);
+
+ /** try to import pkey if private key available */
+ if (rh->priv_key)
+ process_discovered_authority(name, auth->zone,
+ rh->authority_chain_tail->zone,
+ rh->priv_key);
}
}
- GNUNET_CRYPTO_hash(name, strlen(name), &name_hash);
- GNUNET_CRYPTO_hash_xor(key, &name_hash, &zone);
+ GNUNET_CRYPTO_short_hash(name, strlen(name), &name_hash);
+ GNUNET_CRYPTO_short_hash_double(&name_hash, &name_hash_double);
+ GNUNET_CRYPTO_hash_xor(key, &name_hash_double, &zone_hash_double);
+ GNUNET_CRYPTO_short_hash_from_truncation (&zone_hash_double, &zone);
/* Save to namestore */
- if (0 != GNUNET_CRYPTO_hash_cmp(&rh->authority_chain_tail->zone, &zone))
+ if (0 != GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_tail->zone,
+ &zone))
{
GNUNET_NAMESTORE_record_put (namestore_handle,
&nrb->public_key,
* delegate
* FIXME in this case. should we ask namestore again?
*/
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_DHT-%llu: Answer from DHT for %s. Yet to resolve: %s\n",
+ rh->id, rh->authority_name, rh->name);
if (strcmp(rh->name, "") == 0)
+ {
rh->proc(rh->proc_cls, rh, 0, NULL);
+ }
else
- resolve_delegation_dht(rh);
+ {
+ rh->proc = &handle_delegation_ns;
+ resolve_delegation_ns(rh);
+ }
return;
}
-
+
/**
- * should never get here unless false dht key/put
- * block plugin should handle this
- **/
- GNUNET_log(GNUNET_ERROR_TYPE_ERROR, "DHT authority lookup error!\n");
- GNUNET_break(0);
+ * No pkey but name exists
+ * promote back
+ */
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_DHT-%llu: Adding %s back to %s\n",
+ rh->id, rh->authority_name, rh->name);
+ if (strcmp(rh->name, "") == 0)
+ strcpy(rh->name, rh->authority_name);
+ else
+ GNUNET_snprintf(rh->name, MAX_DNS_NAME_LENGTH, "%s.%s",
+ rh->name, rh->authority_name); //FIXME ret
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_DHT-%llu: %s restored\n", rh->id, rh->name);
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_DHT-%llu: DHT authority lookup found no match!\n",
+ rh->id);
+ rh->proc(rh->proc_cls, rh, 0, NULL);
+}
+
+#define MAX_SOA_LENGTH sizeof(uint32_t)+sizeof(uint32_t)+sizeof(uint32_t)+sizeof(uint32_t)\
+ +(MAX_DNS_NAME_LENGTH*2)
+#define MAX_MX_LENGTH sizeof(uint16_t)+MAX_DNS_NAME_LENGTH
+
+
+static void
+expand_plus(char** dest, char* src, char* repl)
+{
+ char* pos;
+ unsigned int s_len = strlen(src)+1;
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_POSTPROCESS: Got %s to expand with %s\n", src, repl);
+
+ if (s_len < 3)
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_POSTPROCESS: %s to short\n", src);
+
+ /* no postprocessing */
+ memcpy(*dest, src, s_len+1);
+ return;
+ }
+
+ if (0 == strcmp(src+s_len-3, ".+"))
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_POSTPROCESS: Expanding .+ in %s\n", src);
+ memset(*dest, 0, s_len+strlen(repl)+strlen(GNUNET_GNS_TLD));
+ strcpy(*dest, src);
+ pos = *dest+s_len-2;
+ strcpy(pos, repl);
+ pos += strlen(repl);
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_POSTPROCESS: Expanded to %s\n", *dest);
+ }
+ else
+ {
+ memcpy(*dest, src, s_len+1);
+ }
}
+/**
+ * finish lookup
+ */
+static void
+finish_lookup(struct ResolverHandle *rh,
+ struct RecordLookupHandle* rlh,
+ unsigned int rd_count,
+ const struct GNUNET_NAMESTORE_RecordData *rd)
+{
+ int i;
+ char new_rr_data[MAX_DNS_NAME_LENGTH];
+ char new_mx_data[MAX_MX_LENGTH];
+ char new_soa_data[MAX_SOA_LENGTH];
+ struct GNUNET_NAMESTORE_RecordData p_rd[rd_count];
+ char* repl_string;
+ char* pos;
+ unsigned int offset;
+
+ if (rh->timeout_task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel(rh->timeout_task);
+
+ if (rd_count > 0)
+ memcpy(p_rd, rd, rd_count*sizeof(struct GNUNET_NAMESTORE_RecordData));
+
+ for (i = 0; i < rd_count; i++)
+ {
+
+ if (rd[i].record_type != GNUNET_GNS_RECORD_TYPE_NS &&
+ rd[i].record_type != GNUNET_GNS_RECORD_TYPE_CNAME &&
+ rd[i].record_type != GNUNET_GNS_RECORD_MX &&
+ rd[i].record_type != GNUNET_GNS_RECORD_TYPE_SOA)
+ {
+ p_rd[i].data = rd[i].data;
+ continue;
+ }
+
+ /**
+ * for all those records we 'should'
+ * also try to resolve the A/AAAA records (RFC1035)
+ * This is a feature and not important
+ */
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_POSTPROCESS: Postprocessing\n");
+
+ if (strcmp(rh->name, "+") == 0)
+ repl_string = rlh->name;
+ else
+ repl_string = rlh->name+strlen(rh->name)+1;
+
+ offset = 0;
+ if (rd[i].record_type == GNUNET_GNS_RECORD_MX)
+ {
+ memcpy(new_mx_data, (char*)rd[i].data, sizeof(uint16_t));
+ offset = sizeof(uint16_t);
+ pos = new_mx_data+offset;
+ expand_plus(&pos, (char*)rd[i].data+sizeof(uint16_t),
+ repl_string);
+ offset += strlen(new_mx_data+sizeof(uint16_t))+1;
+ p_rd[i].data = new_mx_data;
+ p_rd[i].data_size = offset;
+ }
+ else if (rd[i].record_type == GNUNET_GNS_RECORD_TYPE_SOA)
+ {
+ /* expand mname and rname */
+ pos = new_soa_data;
+ expand_plus(&pos, (char*)rd[i].data, repl_string);
+ offset = strlen(new_soa_data)+1;
+ pos = new_soa_data+offset;
+ expand_plus(&pos, (char*)rd[i].data+offset, repl_string);
+ offset += strlen(new_soa_data+offset)+1;
+ /* cpy the 4 numbers serial refresh retry and expire */
+ memcpy(new_soa_data+offset, (char*)rd[i].data+offset, sizeof(uint32_t)*5);
+ offset += sizeof(uint32_t)*5;
+ p_rd[i].data_size = offset;
+ p_rd[i].data = new_soa_data;
+ }
+ else
+ {
+ pos = new_rr_data;
+ expand_plus(&pos, (char*)rd[i].data, repl_string);
+ p_rd[i].data_size = strlen(new_rr_data)+1;
+ p_rd[i].data = new_rr_data;
+ }
+
+ }
+
+ rlh->proc(rlh->proc_cls, rd_count, p_rd);
+ GNUNET_free(rlh);
+
+}
/**
* Process DHT lookup result for record.
const struct GNUNET_NAMESTORE_RecordData *rd)
{
struct RecordLookupHandle* rlh;
+
rlh = (struct RecordLookupHandle*)cls;
if (rd_count == 0)
{
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "No records for %s found in DHT. Aborting\n",
- rh->name);
+ "GNS_PHASE_REC-%d: No records for %s found in DHT. Aborting\n",
+ rh->id, rh->name);
/* give up, cannot resolve */
- rlh->proc(rlh->proc_cls, 0, NULL);
+ finish_lookup(rh, rlh, 0, NULL);
+ free_resolver_handle(rh);
return;
}
/* results found yay */
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Record resolved from DHT!");
- rlh->proc(rlh->proc_cls, rd_count, rd);
+ "GNS_PHASE_REC-%d: Record resolved from DHT!", rh->id);
+
+ finish_lookup(rh, rlh, rd_count, rd);
+ free_resolver_handle(rh);
}
rlh = (struct RecordLookupHandle*) cls;
if (rd_count == 0)
{
- /* ns entry expired and not ours. try dht */
- if (rh->status & (EXPIRED | !EXISTS) &&
- GNUNET_CRYPTO_hash_cmp(&rh->authority_chain_head->zone,
- &rh->authority_chain_tail->zone))
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_REC-%d: NS returned no records. (status: %d)!\n",
+ rh->id,
+ rh->status);
+
+ /**
+ * There are 4 conditions that have to met for us to consult the DHT:
+ * 1. The entry in the DHT is RSL_RECORD_EXPIRED AND
+ * 2. No entry in the NS existed AND
+ * 3. The zone queried is not the local resolver's zone AND
+ * 4. The name that was looked up is '+'
+ * because if it was any other canonical name we either already queried
+ * the DHT for the authority in the authority lookup phase (and thus
+ * would already have an entry in the NS for the record)
+ */
+ if (rh->status & (RSL_RECORD_EXPIRED | !RSL_RECORD_EXISTS) &&
+ GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
+ &local_zone) &&
+ (strcmp(rh->name, "+") == 0))
{
rh->proc = &handle_record_dht;
resolve_record_dht(rh);
return;
}
/* give up, cannot resolve */
- rlh->proc(rlh->proc_cls, 0, NULL);
+ finish_lookup(rh, rlh, 0, NULL);
+ free_resolver_handle(rh);
return;
}
/* results found yay */
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Record resolved from namestore!");
- rlh->proc(rlh->proc_cls, rd_count, rd);
+ "GNS_PHASE_REC-%d: Record resolved from namestore!", rh->id);
+
+ finish_lookup(rh, rlh, rd_count, rd);
+
+ free_resolver_handle(rh);
}
strcpy(dest, (name+len+1));
}
+/**
+ * Checks if name is in tld
+ *
+ * @param name the name to check
+ * @param tld the TLD to check for
+ * @return GNUNET_YES or GNUNET_NO
+ */
+int
+is_tld(const char* name, const char* tld)
+{
+ int offset = 0;
+
+ if (strlen(name) <= strlen(tld))
+ {
+ return GNUNET_NO;
+ }
+
+ offset = strlen(name)-strlen(tld);
+ if (strcmp(name+offset, tld) != 0)
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "%s is not in .%s TLD\n", name, tld);
+ return GNUNET_NO;
+ }
+ return GNUNET_YES;
+}
+
/**
* DHT resolution for delegation finished. Processing result.
*
struct RecordLookupHandle* rlh;
rlh = (struct RecordLookupHandle*) cls;
+
if (strcmp(rh->name, "") == 0)
{
+ if ((rlh->record_type == GNUNET_GNS_RECORD_PKEY))
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_DHT-%llu: Resolved queried PKEY via DHT.\n",
+ rh->id);
+ finish_lookup(rh, rlh, rd_count, rd);
+ free_resolver_handle(rh);
+ return;
+ }
/* We resolved full name for delegation. resolving record */
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Resolved full name for delegation via DHT. resolving record '' in ns\n");
+ "GNS_PHASE_DELEGATE_DHT-%llu: Resolved full name for delegation via DHT.\n",
+ rh->id);
+ strcpy(rh->name, "+\0");
rh->proc = &handle_record_ns;
resolve_record_ns(rh);
return;
if (is_canonical(rh->name))
{
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Resolving canonical record %s in ns\n", rh->name);
+ "GNS_PHASE_DELEGATE_DHT-%llu: Resolving canonical record %s in ns\n",
+ rh->id,
+ rh->name);
rh->proc = &handle_record_ns;
resolve_record_ns(rh);
return;
}
/* give up, cannot resolve */
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Cannot fully resolve delegation for %s via DHT!\n",
- rh->name);
- rlh->proc(rlh->proc_cls, 0, NULL);
+ "GNS_PHASE_DELEGATE_DHT-%llu: Cannot fully resolve delegation for %s via DHT!\n",
+ rh->id, rh->name);
+ finish_lookup(rh, rlh, 0, NULL);
+ free_resolver_handle(rh);
}
resolve_delegation_dht(struct ResolverHandle *rh)
{
uint32_t xquery;
- GNUNET_HashCode name_hash;
+ struct GNUNET_CRYPTO_ShortHashCode name_hash;
+ GNUNET_HashCode name_hash_double;
+ GNUNET_HashCode zone_hash_double;
GNUNET_HashCode lookup_key;
-
- GNUNET_CRYPTO_hash(rh->authority_name,
+ struct ResolverHandle *rh_heap_root;
+
+ pop_tld(rh->name, rh->authority_name);
+ GNUNET_CRYPTO_short_hash(rh->authority_name,
strlen(rh->authority_name),
&name_hash);
- GNUNET_CRYPTO_hash_xor(&name_hash, &rh->authority, &lookup_key);
-
- rh->dht_timeout_task = GNUNET_SCHEDULER_add_delayed (DHT_LOOKUP_TIMEOUT,
- &dht_authority_lookup_timeout,
- rh);
+ GNUNET_CRYPTO_short_hash_double(&name_hash, &name_hash_double);
+ GNUNET_CRYPTO_short_hash_double(&rh->authority, &zone_hash_double);
+ GNUNET_CRYPTO_hash_xor(&name_hash_double, &zone_hash_double, &lookup_key);
+
+ rh->dht_heap_node = NULL;
+ if (rh->timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
+ {
+ //rh->timeout_task = GNUNET_SCHEDULER_add_delayed (DHT_LOOKUP_TIMEOUT,
+ // &dht_authority_lookup_timeout,
+ // rh);
+ rh->timeout_cont = &dht_authority_lookup_timeout;
+ rh->timeout_cont_cls = rh;
+ }
+ else
+ {
+ if (max_allowed_background_queries <=
+ GNUNET_CONTAINER_heap_get_size (dht_lookup_heap))
+ {
+ /* terminate oldest lookup */
+ rh_heap_root = GNUNET_CONTAINER_heap_remove_root (dht_lookup_heap);
+ GNUNET_DHT_get_stop(rh_heap_root->get_handle);
+ rh_heap_root->dht_heap_node = NULL;
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_DHT-%llu: Replacing oldest background query for %s\n",
+ rh->id, rh_heap_root->authority_name);
+
+ rh_heap_root->proc(rh_heap_root->proc_cls,
+ rh_heap_root,
+ 0,
+ NULL);
+ }
+ rh->dht_heap_node = GNUNET_CONTAINER_heap_insert (dht_lookup_heap,
+ rh,
+ GNUNET_TIME_absolute_get().abs_value);
+ }
+
xquery = htonl(GNUNET_GNS_RECORD_PKEY);
+ GNUNET_assert(rh->get_handle == NULL);
rh->get_handle = GNUNET_DHT_get_start(dht_handle,
- DHT_OPERATION_TIMEOUT,
+ GNUNET_TIME_UNIT_FOREVER_REL,
GNUNET_BLOCK_TYPE_GNS_NAMERECORD,
&lookup_key,
DHT_GNS_REPLICATION_LEVEL,
{
struct RecordLookupHandle* rlh;
rlh = (struct RecordLookupHandle*) cls;
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_NS-%llu: Resolution status: %d.\n",
+ rh->id, rh->status);
if (strcmp(rh->name, "") == 0)
{
+ if ((rlh->record_type == GNUNET_GNS_RECORD_PKEY))
+ {
+ GNUNET_assert(rd_count == 1);
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_NS-%llu: Resolved queried PKEY in NS.\n",
+ rh->id);
+ finish_lookup(rh, rlh, rd_count, rd);
+ free_resolver_handle(rh);
+ return;
+ }
/* We resolved full name for delegation. resolving record */
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Resolved full name for delegation. resolving record ''\n");
+ "GNS_PHASE_DELEGATE_NS-%llu: Resolved full name for delegation.\n",
+ rh->id);
+ strcpy(rh->name, "+\0");
rh->proc = &handle_record_ns;
resolve_record_ns(rh);
return;
* and exists
* or we are authority
**/
- if ((rh->status & (EXISTS | !EXPIRED)) ||
- !GNUNET_CRYPTO_hash_cmp(&rh->authority_chain_head->zone,
- &rh->authority_chain_tail->zone))
+ if (((rh->status & RSL_RECORD_EXISTS) && (!(rh->status & RSL_RECORD_EXPIRED)))
+ || !GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
+ &local_zone))
{
if (is_canonical(rh->name))
{
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Resolving canonical record %s\n", rh->name);
+ "GNS_PHASE_DELEGATE_NS-%llu: Resolving canonical record %s\n",
+ rh->id,
+ rh->name);
rh->proc = &handle_record_ns;
resolve_record_ns(rh);
}
{
/* give up, cannot resolve */
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Cannot fully resolve delegation for %s!\n",
- rh->name);
- rlh->proc(rlh->proc_cls, 0, NULL);
+ "GNS_PHASE_DELEGATE_NS-%llu: Cannot fully resolve delegation for %s!\n",
+ rh->id,
+ rh->name);
+ finish_lookup(rh, rlh, rd_count, rd);
+ //rlh->proc(rlh->proc_cls, 0, NULL);
}
return;
}
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Trying to resolve delegation for %s via DHT\n",
- rh->name);
+ "GNS_PHASE_DELEGATE_NS-%llu: Trying to resolve delegation for %s via DHT\n",
+ rh->id, rh->name);
rh->proc = &handle_delegation_dht;
resolve_delegation_dht(rh);
}
-/* Prototype */
-static void resolve_delegation_ns(struct ResolverHandle *rh);
/**
{
struct ResolverHandle *rh;
struct GNUNET_TIME_Relative remaining_time;
- GNUNET_HashCode zone;
- char* new_name;
-
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Got %d records from authority lookup\n",
- rd_count);
+ struct GNUNET_CRYPTO_ShortHashCode zone;
+ char new_name[MAX_DNS_NAME_LENGTH];
+
+ rh = (struct ResolverHandle *)cls;
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_NS-%llu: Got %d records from authority lookup\n",
+ rh->id, rd_count);
- rh = (struct ResolverHandle *)cls;
- GNUNET_CRYPTO_hash(key,
+ GNUNET_CRYPTO_short_hash(key,
sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
&zone);
remaining_time = GNUNET_TIME_absolute_get_remaining (expiration);
if (name != NULL)
{
- rh->status |= EXISTS;
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_NS-%llu: Records with name %s exist.\n",
+ rh->id, name);
+ rh->status |= RSL_RECORD_EXISTS;
}
if (remaining_time.rel_value == 0)
{
- rh->status |= EXPIRED;
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_NS-%llu: Record set %s expired.\n",
+ rh->id, name);
+ rh->status |= RSL_RECORD_EXPIRED;
}
/**
{
/* simply promote back */
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Promoting %s back to name\n", rh->authority_name);
+ "GNS_PHASE_DELEGATE_NS-%llu: Promoting %s back to name\n",
+ rh->id, rh->authority_name);
strcpy(rh->name, rh->authority_name);
}
else
{
/* add back to existing name */
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Adding %s back to %s\n",
- rh->authority_name, rh->name);
- new_name = GNUNET_malloc(strlen(rh->name)
- + strlen(rh->authority_name) + 2);
- memset(new_name, 0, strlen(rh->name) + strlen(rh->authority_name) + 2);
- strcpy(new_name, rh->name);
- strcpy(new_name+strlen(new_name)+1, ".");
- strcpy(new_name+strlen(new_name)+2, rh->authority_name);
- GNUNET_free(rh->name);
- rh->name = new_name;
+ "GNS_PHASE_DELEGATE_NS-%llu: Adding %s back to %s\n",
+ rh->id, rh->authority_name, rh->name);
+ //memset(new_name, 0, strlen(rh->name) + strlen(rh->authority_name) + 2);
+ GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
+ rh->name, rh->authority_name);
+ //strcpy(new_name, rh->name);
+ //strcpy(new_name+strlen(new_name), ".");
+ //strcpy(new_name+strlen(new_name), rh->authority_name);
+ strcpy(rh->name, new_name);
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_NS-%llu: %s restored\n", rh->id, rh->name);
}
rh->proc(rh->proc_cls, rh, 0, NULL);
return;
if (rd[i].record_type != GNUNET_GNS_RECORD_PKEY)
continue;
+
+ if (ignore_pending_records &&
+ (rd[i].flags & GNUNET_NAMESTORE_RF_PENDING))
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_NS-%llu: PKEY for %s is pending user confirmation.\n",
+ name,
+ rh->id);
+ continue;
+ }
if ((GNUNET_TIME_absolute_get_remaining (rd[i].expiration)).rel_value
== 0)
{
- GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "This pkey is expired.\n");
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_NS-%llu: This pkey is expired.\n",
+ rh->id);
if (remaining_time.rel_value == 0)
{
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "This dht entry is expired.\n");
+ "GNS_PHASE_DELEGATE_NS-%llu: This dht entry is expired.\n",
+ rh->id);
rh->authority_chain_head->fresh = 0;
rh->proc(rh->proc_cls, rh, 0, NULL);
return;
* Resolve rest of query with new authority
*/
GNUNET_assert(rd[i].record_type == GNUNET_GNS_RECORD_PKEY);
- memcpy(&rh->authority, rd[i].data, sizeof(GNUNET_HashCode));
+ memcpy(&rh->authority, rd[i].data,
+ sizeof(struct GNUNET_CRYPTO_ShortHashCode));
struct AuthorityChain *auth = GNUNET_malloc(sizeof(struct AuthorityChain));
auth->zone = rh->authority;
- auth->name = GNUNET_malloc(strlen(rh->authority_name)+1);
memset(auth->name, 0, strlen(rh->authority_name)+1);
strcpy(auth->name, rh->authority_name);
GNUNET_CONTAINER_DLL_insert (rh->authority_chain_head,
rh->authority_chain_tail,
auth);
+ /** try to import pkey if private key available */
+ if (rh->priv_key)
+ process_discovered_authority((char*)name, auth->zone,
+ rh->authority_chain_tail->zone,
+ rh->priv_key);
/**
* We are done with PKEY resolution if name is empty
* else resolve again with new authority
*/
if (strcmp(rh->name, "") == 0)
- rh->proc(rh->proc_cls, rh, 0, NULL);
+ rh->proc(rh->proc_cls, rh, rd_count, rd);
else
resolve_delegation_ns(rh);
return;
* no answers found
*/
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Authority lookup successful but no PKEY... never get here\n");
- rh->proc(rh->proc_cls, rh, 0, NULL);
+ "GNS_PHASE_DELEGATE_NS-%llu: Authority lookup and no PKEY...\n", rh->id);
+ /**
+ * If we have found some records for the LAST label
+ * we return the results. Else null.
+ */
+ if (strcmp(rh->name, "") == 0)
+ {
+ /* simply promote back */
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_PHASE_DELEGATE_NS-%llu: Promoting %s back to name\n",
+ rh->id, rh->authority_name);
+ strcpy(rh->name, rh->authority_name);
+ rh->proc(rh->proc_cls, rh, rd_count, rd);
+ }
+ else
+ {
+ rh->proc(rh->proc_cls, rh, 0, NULL);
+ }
}
resolve_delegation_ns(struct ResolverHandle *rh)
{
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
- "Resolving delegation for %s\n", rh->name);
+ "GNS_PHASE_DELEGATE_NS-%llu: Resolving delegation for %s\n",
+ rh->id, rh->name);
pop_tld(rh->name, rh->authority_name);
GNUNET_NAMESTORE_lookup_record(namestore_handle,
&rh->authority,
rh->authority_name,
- GNUNET_GNS_RECORD_PKEY,
+ GNUNET_GNS_RECORD_ANY,
&process_delegation_result_ns,
rh);
* @param zone the root zone
* @param record_type the record type to look up
* @param name the name to look up
+ * @param key a private key for use with PSEU import (can be NULL)
+ * @param timeout timeout for resolution
* @param proc the processor to call on result
* @param cls the closure to pass to proc
*/
void
-gns_resolver_lookup_record(GNUNET_HashCode zone,
+gns_resolver_lookup_record(struct GNUNET_CRYPTO_ShortHashCode zone,
uint32_t record_type,
const char* name,
+ struct GNUNET_CRYPTO_RsaPrivateKey *key,
+ struct GNUNET_TIME_Relative timeout,
RecordLookupProcessor proc,
void* cls)
{
struct ResolverHandle *rh;
struct RecordLookupHandle* rlh;
+ char string_hash[MAX_DNS_LABEL_LENGTH];
+ char nzkey[MAX_DNS_LABEL_LENGTH];
+ char* nzkey_ptr = nzkey;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Starting resolution for %s (type=%d)!\n",
name, record_type);
+
+ if (is_canonical((char*)name) && (strcmp(GNUNET_GNS_TLD, name) != 0))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s is canonical and not gnunet -> cannot resolve!\n", name);
+ proc(cls, 0, NULL);
+ return;
+ }
+
rlh = GNUNET_malloc(sizeof(struct RecordLookupHandle));
rh = GNUNET_malloc(sizeof (struct ResolverHandle));
rh->authority = zone;
+ rh->id = rid++;
rh->proc_cls = rlh;
- rh->name = GNUNET_malloc(strlen(name)
- - strlen(GNUNET_GNS_TLD));
- memset(rh->name, 0,
- strlen(name)-strlen(GNUNET_GNS_TLD));
- memcpy(rh->name, name,
- strlen(name)-strlen(GNUNET_GNS_TLD) - 1);
- rh->authority_name = GNUNET_malloc(sizeof(char)*MAX_DNS_LABEL_LENGTH);
+ rh->priv_key = key;
+ rh->timeout = timeout;
+ rh->get_handle = NULL;
+ if (timeout.rel_value != GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
+ {
+ /*
+ * Set timeout for authority lookup phase to 1/2
+ */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Timeout for lookup set to %ds\n", rh->timeout.rel_value);
+ rh->timeout_task = GNUNET_SCHEDULER_add_delayed(
+ GNUNET_TIME_relative_divide(timeout, 2),
+ &handle_lookup_timeout,
+ rh);
+ rh->timeout_cont = &dht_authority_lookup_timeout;
+ rh->timeout_cont_cls = rh;
+ }
+ else
+ {
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "No timeout for query!\n");
+ rh->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+
+ if (strcmp(GNUNET_GNS_TLD, name) == 0)
+ {
+ /**
+ * Only 'gnunet' given
+ */
+ strcpy(rh->name, "\0");
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Checking for TLD...\n");
+ if (is_zkey_tld(name) == GNUNET_YES)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "TLD is zkey\n");
+ /**
+ * This is a zkey tld
+ * build hash and use as initial authority
+ */
+ memset(rh->name, 0,
+ strlen(name)-strlen(GNUNET_GNS_TLD_ZKEY));
+ memcpy(rh->name, name,
+ strlen(name)-strlen(GNUNET_GNS_TLD_ZKEY) - 1);
+ pop_tld(rh->name, string_hash);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "ZKEY is %s!\n", string_hash);
+
+ GNUNET_STRINGS_utf8_toupper(string_hash, &nzkey_ptr);
+
+ if (GNUNET_OK != GNUNET_CRYPTO_short_hash_from_string(nzkey,
+ &rh->authority))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Cannot convert ZKEY %s to hash!\n", string_hash);
+ GNUNET_free(rh);
+ GNUNET_free(rlh);
+ proc(cls, 0, NULL);
+ return;
+ }
+
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "TLD is gnunet\n");
+ /**
+ * Presumably GNUNET tld
+ */
+ memset(rh->name, 0,
+ strlen(name)-strlen(GNUNET_GNS_TLD));
+ memcpy(rh->name, name,
+ strlen(name)-strlen(GNUNET_GNS_TLD) - 1);
+ }
+ }
+
+ /**
+ * Initialize authority chain
+ */
rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
rh->authority_chain_head->prev = NULL;
rh->authority_chain_head->next = NULL;
rh->authority_chain_tail = rh->authority_chain_head;
- rh->authority_chain_head->zone = zone;
-
+ rh->authority_chain_head->zone = rh->authority;
+
+ /**
+ * Copy original query into lookup handle
+ */
rlh->record_type = record_type;
- rlh->name = (char*)name; //FIXME
+ memset(rlh->name, 0, strlen(name) + 1);
+ strcpy(rlh->name, name);
rlh->proc = proc;
rlh->proc_cls = cls;
struct NameShortenHandle* nsh = (struct NameShortenHandle*)rh->proc_cls;
struct AuthorityChain *next_authority;
- char* result;
- char* next_authority_name;
+ char result[MAX_DNS_NAME_LENGTH];
+ char next_authority_name[MAX_DNS_LABEL_LENGTH];
size_t answer_len;
/* we found a match in our own zone */
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
"result strlen %d\n", strlen(name));
answer_len = strlen(rh->name) + strlen(name) + strlen(GNUNET_GNS_TLD) + 3;
- result = GNUNET_malloc(answer_len);
memset(result, 0, answer_len);
- strcpy(result, rh->name);
- strcpy(result+strlen(rh->name), ".");
- strcpy(result+strlen(rh->name)+1, name);
- strcpy(result+strlen(rh->name)+strlen(name)+1, ".");
- strcpy(result+strlen(rh->name)+strlen(name)+2, GNUNET_GNS_TLD);
+ if (strlen(rh->name) > 0)
+ {
+ strcpy(result, rh->name);
+ strcpy(result+strlen(rh->name), ".");
+ }
+
+ strcpy(result+strlen(result), name);
+ strcpy(result+strlen(result), ".");
+ strcpy(result+strlen(result), GNUNET_GNS_TLD);
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
"Sending shorten result %s\n", result);
nsh->proc(nsh->proc_cls, result);
+ GNUNET_free(nsh);
free_resolver_handle(rh);
- GNUNET_free(result);
}
- else if (GNUNET_CRYPTO_hash_cmp(&rh->authority_chain_head->zone,
- &rh->authority_chain_tail->zone))
+ else if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
+ &local_zone) == 0)
{
/* our zone, just append .gnunet */
answer_len = strlen(rh->name) + strlen(GNUNET_GNS_TLD) + 2;
- result = GNUNET_malloc(answer_len);
memset(result, 0, answer_len);
strcpy(result, rh->name);
strcpy(result+strlen(rh->name), ".");
"Our zone: Sending name as shorten result %s\n", rh->name);
nsh->proc(nsh->proc_cls, result);
+ GNUNET_free(nsh);
free_resolver_handle(rh);
- GNUNET_free(result);
}
else
{
* continue with next authority
*/
next_authority = rh->authority_chain_head;
- next_authority_name = GNUNET_malloc(strlen(rh->name)+
- strlen(next_authority->name) + 2);
- memset(next_authority_name, 0, strlen(rh->name)+
- strlen(next_authority->name) + 2);
- strcpy(next_authority_name, rh->name);
- strcpy(next_authority_name+strlen(rh->name)+1, ".");
- strcpy(next_authority_name+strlen(rh->name)+2, next_authority->name);
-
- GNUNET_free(rh->name);
- rh->name = next_authority_name;
+
+ GNUNET_snprintf(next_authority_name, MAX_DNS_NAME_LENGTH,
+ "%s.%s", rh->name, next_authority->name);
+
+ strcpy(rh->name, next_authority_name);
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "No PSEU found for authority %s. Promoting back: %s\n",
+ next_authority->name, rh->name);
+
GNUNET_CONTAINER_DLL_remove(rh->authority_chain_head,
rh->authority_chain_tail,
next_authority);
}
}
+/**
+ * DHT resolution for delegation. Processing result.
+ *
+ * @param cls the closure
+ * @param rh resolver handle
+ * @param rd_count number of results
+ * @param rd record data
+ */
+static void
+handle_delegation_dht_bg_shorten(void* cls, struct ResolverHandle *rh,
+ unsigned int rd_count,
+ const struct GNUNET_NAMESTORE_RecordData *rd)
+{
+
+ /* We resolved full name for delegation. resolving record */
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_SHORTEN: Resolved up to %s for delegation via DHT in background.\n",
+ rh->name);
+ free_resolver_handle(rh);
+}
/**
* Process result from namestore delegation lookup
const struct GNUNET_NAMESTORE_RecordData *rd)
{
struct NameShortenHandle *nsh;
- char* result;
+ char result[MAX_DNS_NAME_LENGTH];
size_t answer_len;
+ struct ResolverHandle *rh_bg;
nsh = (struct NameShortenHandle *)cls;
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
"PKEY resolved as far as possible in ns up to %s!\n", rh->name);
- if (GNUNET_CRYPTO_hash_cmp(&rh->authority_chain_head->zone,
- &rh->authority_chain_tail->zone) == 0)
+ if (GNUNET_CRYPTO_short_hash_cmp(&rh->authority_chain_head->zone,
+ &local_zone) == 0)
{
/**
* This is our zone append .gnunet unless name is empty
* (it shouldn't be, usually FIXME what happens if we
* shorten to our zone to a "" record??)
- **/
+ */
answer_len = strlen(rh->name) + strlen(GNUNET_GNS_TLD) + 2;
- result = GNUNET_malloc(answer_len);
memset(result, 0, answer_len);
strcpy(result, rh->name);
strcpy(result+strlen(rh->name), ".");
"Our zone: Sending name as shorten result %s\n", rh->name);
nsh->proc(nsh->proc_cls, result);
+ GNUNET_free(nsh);
free_resolver_handle(rh);
- GNUNET_free(result);
return;
}
+ /**
+ * we have to this before zone to name for rh might
+ * be freed by then
+ */
+ rh_bg = NULL;
+ if (!is_canonical(rh->name))
+ {
+ rh_bg = GNUNET_malloc(sizeof(struct ResolverHandle));
+ memcpy(rh_bg, rh, sizeof(struct ResolverHandle));
+ rh_bg->id = rid++;
+ }
+
/* backtrack authorities for names */
GNUNET_NAMESTORE_zone_to_name (namestore_handle,
&rh->authority_chain_tail->zone, //ours
&rh->authority_chain_head->zone,
&process_zone_to_name_shorten,
rh);
+
+ if (rh_bg == NULL)
+ {
+ return;
+ }
+
+ /**
+ * If authority resolution is incomplete we can do a background lookup
+ * of the full name so that next time we can (likely) fully or at least
+ * further shorten the name
+ */
+ rh_bg->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
+ rh_bg->authority_chain_tail = rh_bg->authority_chain_head;
+ rh_bg->authority_chain_head->zone = rh_bg->authority;
+
+ rh_bg->proc = &handle_delegation_dht_bg_shorten;
+ rh_bg->proc_cls = NULL;
+
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "GNS_SHORTEN: Starting background lookup for %s\n",
+ rh_bg->name);
+
+ resolve_delegation_dht(rh_bg);
+
+}
+
+
+/**
+ * Callback calles by namestore for a zone to name
+ * result
+ *
+ * @param cls the closure
+ * @param zone_key the zone we queried
+ * @param expire the expiration time of the name
+ * @param name the name found or NULL
+ * @param rd_len number of records for the name
+ * @param rd the record data (PKEY) for the name
+ * @param signature the signature for the record data
+ */
+static void
+process_zone_to_name_zkey(void *cls,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *zone_key,
+ struct GNUNET_TIME_Absolute expire,
+ const char *name,
+ unsigned int rd_len,
+ const struct GNUNET_NAMESTORE_RecordData *rd,
+ const struct GNUNET_CRYPTO_RsaSignature *signature)
+{
+ struct ResolverHandle *rh = cls;
+ struct NameShortenHandle *nsh = rh->proc_cls;
+ struct GNUNET_CRYPTO_ShortHashAsciiEncoded enc;
+ char new_name[MAX_DNS_NAME_LENGTH];
+
+ /* zkey not in our zone */
+ if (name == NULL)
+ {
+ /**
+ * In this case we have not given this PKEY a name (yet)
+ * It is either just not in our zone or not even cached
+ * Since we do not know at this point we will not try to shorten
+ * because PKEY import will happen if the user follows the zkey
+ * link.
+ */
+ GNUNET_CRYPTO_short_hash_to_enc ((struct GNUNET_CRYPTO_ShortHashCode*)rd,
+ &enc);
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "No name found for zkey %s returning verbatim!\n", enc);
+ if (strcmp(rh->name, "") != 0)
+ GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s.%s",
+ rh->name, enc, GNUNET_GNS_TLD_ZKEY);
+ else
+ GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
+ enc, GNUNET_GNS_TLD_ZKEY);
+ nsh->proc(nsh->proc_cls, new_name);
+ GNUNET_free(nsh);
+ free_resolver_handle(rh);
+ return;
+ }
+
+ if (strcmp(rh->name, "") != 0)
+ GNUNET_snprintf(new_name, MAX_DNS_NAME_LENGTH, "%s.%s",
+ rh->name, name);
+ else
+ strcpy(new_name, name);
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
+ "Continue shorten for %s!\n", new_name);
+
+ strcpy(rh->name, new_name);
+
+ rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
+ rh->authority_chain_tail = rh->authority_chain_head;
+ rh->authority_chain_head->zone = rh->authority;
+
+
+ /* Start delegation resolution in our namestore */
+ resolve_delegation_ns(rh);
}
+
/**
* Shorten api from resolver
*
* @param zone the zone to use
* @param name the name to shorten
+ * @param key optional private key for background lookups and PSEU import
* @param proc the processor to call with result
- * @param cls closure to pass to proc
+ * @param proc_cls closure to pass to proc
*/
void
-gns_resolver_shorten_name(GNUNET_HashCode zone,
+gns_resolver_shorten_name(struct GNUNET_CRYPTO_ShortHashCode zone,
const char* name,
+ struct GNUNET_CRYPTO_RsaPrivateKey *key,
ShortenResultProcessor proc,
- void* cls)
+ void* proc_cls)
{
struct ResolverHandle *rh;
struct NameShortenHandle *nsh;
+ char string_hash[MAX_DNS_LABEL_LENGTH];
+ struct GNUNET_CRYPTO_ShortHashCode zkey;
+ char nzkey[MAX_DNS_LABEL_LENGTH];
+ char* nzkey_ptr = nzkey;
+
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Starting shorten for %s!\n", name);
+ if (is_canonical((char*)name))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s is canonical. Returning verbatim\n", name);
+ proc(proc_cls, name);
+ return;
+ }
+
nsh = GNUNET_malloc(sizeof (struct NameShortenHandle));
+
+ nsh->proc = proc;
+ nsh->proc_cls = proc_cls;
+
rh = GNUNET_malloc(sizeof (struct ResolverHandle));
rh->authority = zone;
- rh->name = GNUNET_malloc(strlen(name)
- - strlen(GNUNET_GNS_TLD));
- memset(rh->name, 0,
- strlen(name)-strlen(GNUNET_GNS_TLD));
- memcpy(rh->name, name,
- strlen(name)-strlen(GNUNET_GNS_TLD)-1);
-
- rh->authority_name = GNUNET_malloc(sizeof(char)*MAX_DNS_LABEL_LENGTH);
- rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
- rh->authority_chain_tail = rh->authority_chain_head;
- rh->authority_chain_head->zone = zone;
+ rh->id = rid++;
+ rh->priv_key = key;
rh->proc = &handle_delegation_ns_shorten;
rh->proc_cls = nsh;
+ rh->id = rid++;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Checking for TLD...\n");
+ if (is_zkey_tld(name) == GNUNET_YES)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "TLD is zkey\n");
+ /**
+ * This is a zkey tld
+ * build hash and use as initial authority
+ * FIXME sscanf
+ */
+ memset(rh->name, 0,
+ strlen(name)-strlen(GNUNET_GNS_TLD_ZKEY));
+ memcpy(rh->name, name,
+ strlen(name)-strlen(GNUNET_GNS_TLD_ZKEY) - 1);
+ pop_tld(rh->name, string_hash);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "ZKEY is %s!\n", string_hash);
+
+ GNUNET_STRINGS_utf8_toupper(string_hash, &nzkey_ptr);
- nsh->proc = proc;
- nsh->proc_cls = cls;
+ if (GNUNET_OK != GNUNET_CRYPTO_short_hash_from_string(nzkey,
+ &zkey))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Cannot convert ZKEY %s to hash!\n", nzkey);
+ GNUNET_free(rh);
+ GNUNET_free(nsh);
+ proc(proc_cls, name);
+ return;
+ }
+
+ GNUNET_NAMESTORE_zone_to_name (namestore_handle,
+ &zone, //ours
+ &zkey,
+ &process_zone_to_name_zkey,
+ rh);
+ return;
+
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "TLD is gnunet\n");
+ /**
+ * Presumably GNUNET tld
+ */
+ memset(rh->name, 0,
+ strlen(name)-strlen(GNUNET_GNS_TLD));
+ memcpy(rh->name, name,
+ strlen(name)-strlen(GNUNET_GNS_TLD) - 1);
+ }
+
+ rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
+ rh->authority_chain_tail = rh->authority_chain_head;
+ rh->authority_chain_head->zone = zone;
+
/* Start delegation resolution in our namestore */
resolve_delegation_ns(rh);
const struct GNUNET_NAMESTORE_RecordData *rd)
{
struct GetNameAuthorityHandle* nah;
- char* result;
+ char result[MAX_DNS_NAME_LENGTH];
size_t answer_len;
nah = (struct GetNameAuthorityHandle*) rh->proc_cls;
answer_len = strlen(nah->name) - strlen(rh->name)
+ strlen(GNUNET_GNS_TLD) + 1;
- result = GNUNET_malloc(answer_len);
memset(result, 0, answer_len);
strcpy(result, nah->name + strlen(rh->name) + 1);
"Got authority result %s\n", result);
nah->proc(nah->proc_cls, result);
- free_resolver_handle(rh);
- GNUNET_free(result);
GNUNET_free(nah);
+ free_resolver_handle(rh);
}
else
{
GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
"Unable to resolve authority for remaining %s!\n", rh->name);
nah->proc(nah->proc_cls, "");
- free_resolver_handle(rh);
GNUNET_free(nah);
+ free_resolver_handle(rh);
}
* @param zone the root zone to look up for
* @param name the name to lookup up
* @param proc the processor to call when finished
- * @param cls the closure to pass to the processor
+ * @param proc_cls the closure to pass to the processor
*/
void
-gns_resolver_get_authority(GNUNET_HashCode zone,
+gns_resolver_get_authority(struct GNUNET_CRYPTO_ShortHashCode zone,
const char* name,
GetAuthorityResultProcessor proc,
- void* cls)
+ void* proc_cls)
{
struct ResolverHandle *rh;
struct GetNameAuthorityHandle *nah;
nah = GNUNET_malloc(sizeof (struct GetNameAuthorityHandle));
rh = GNUNET_malloc(sizeof (struct ResolverHandle));
rh->authority = zone;
+ rh->id = rid++;
+
+ if (strcmp(GNUNET_GNS_TLD, name) == 0)
+ {
+ strcpy(rh->name, "\0");
+ }
+ else
+ {
+ memset(rh->name, 0,
+ strlen(name)-strlen(GNUNET_GNS_TLD));
+ memcpy(rh->name, name,
+ strlen(name)-strlen(GNUNET_GNS_TLD) - 1);
+ }
- rh->name = GNUNET_malloc(strlen(name)
- - strlen(GNUNET_GNS_TLD));
- memset(rh->name, 0,
- strlen(name)-strlen(GNUNET_GNS_TLD));
- memcpy(rh->name, name,
- strlen(name)-strlen(GNUNET_GNS_TLD) - 1);
-
- nah->name = GNUNET_malloc(strlen(name)+1);
memset(nah->name, 0,
strlen(name)+1);
strcpy(nah->name, name);
- rh->authority_name = GNUNET_malloc(MAX_DNS_LABEL_LENGTH);
-
rh->authority_chain_head = GNUNET_malloc(sizeof(struct AuthorityChain));
rh->authority_chain_tail = rh->authority_chain_head;
rh->authority_chain_head->zone = zone;
rh->proc_cls = (void*)nah;
nah->proc = proc;
- nah->proc_cls = cls;
+ nah->proc_cls = proc_cls;
/* Start delegation resolution in our namestore */
resolve_delegation_ns(rh);
projects / oweals / gnunet.git / blobdiff