/**
* Key of this request.
*/
- GNUNET_HashCode key;
+ struct GNUNET_HashCode key;
/**
* Position of this node in the min heap.
* Type of the requested block.
*/
enum GNUNET_BLOCK_Type type;
-
+
/**
* extended query (see gnunet_block_lib.h). Allocated at the
* end of this struct.
/**
* Path of the reply.
- */
+ */
const struct GNUNET_PeerIdentity *get_path;
/**
/**
* Forward the result to the given peer if it matches the request.
*
- * @param cls the 'struct ProcessContext' with the result
+ * @param cls the `struct ProcessContext` with the result
* @param key the query
- * @param value the 'struct RecentRequest' with the request
- * @return GNUNET_OK (continue to iterate),
- * GNUNET_SYSERR if the result is malformed or type unsupported
+ * @param value the `struct RecentRequest` with the request
+ * @return #GNUNET_OK (continue to iterate),
+ * #GNUNET_SYSERR if the result is malformed or type unsupported
*/
static int
-process (void *cls,
- const GNUNET_HashCode *key,
- void *value)
+process (void *cls, const struct GNUNET_HashCode * key, void *value)
{
struct ProcessContext *pc = cls;
struct RecentRequest *rr = value;
enum GNUNET_BLOCK_EvaluationResult eval;
unsigned int gpl;
unsigned int ppl;
+ struct GNUNET_HashCode hc;
+ const struct GNUNET_HashCode *eval_key;
- if ( (rr->type != GNUNET_BLOCK_TYPE_ANY) &&
- (rr->type != pc->type) )
- return GNUNET_OK; /* type missmatch */
+ if ((rr->type != GNUNET_BLOCK_TYPE_ANY) && (rr->type != pc->type))
+ return GNUNET_OK; /* type missmatch */
if (0 != (rr->options & GNUNET_DHT_RO_RECORD_ROUTE))
{
gpl = 0;
ppl = 0;
}
- eval = GNUNET_BLOCK_evaluate (GDS_block_context,
- pc->type,
- key,
- &rr->reply_bf,
- rr->reply_bf_mutator,
- rr->xquery,
- rr->xquery_size,
- pc->data,
- pc->data_size);
+ if ((0 != (rr->options & GNUNET_DHT_RO_FIND_PEER)) &&
+ (pc->type == GNUNET_BLOCK_TYPE_DHT_HELLO))
+ {
+ /* key may not match HELLO, which is OK since
+ * the search is approximate. Still, the evaluation
+ * would fail since the match is not exact. So
+ * we fake it by changing the key to the actual PID ... */
+ GNUNET_BLOCK_get_key (GDS_block_context, GNUNET_BLOCK_TYPE_DHT_HELLO,
+ pc->data, pc->data_size, &hc);
+ eval_key = &hc;
+ }
+ else
+ {
+ eval_key = key;
+ }
+ eval =
+ GNUNET_BLOCK_evaluate (GDS_block_context, pc->type, eval_key,
+ &rr->reply_bf, rr->reply_bf_mutator, rr->xquery,
+ rr->xquery_size, pc->data, pc->data_size);
switch (eval)
{
case GNUNET_BLOCK_EVALUATION_OK_MORE:
case GNUNET_BLOCK_EVALUATION_OK_LAST:
- GDS_NEIGHBOURS_handle_reply (&rr->peer,
- pc->type,
- pc->expiration_time,
- key,
- ppl,
- pc->put_path,
- gpl,
- pc->get_path,
- pc->data,
- pc->data_size);
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop
+ ("# Good REPLIES matched against routing table"),
+ 1, GNUNET_NO);
+ GDS_NEIGHBOURS_handle_reply (&rr->peer, pc->type, pc->expiration_time, key,
+ ppl, pc->put_path, gpl, pc->get_path, pc->data,
+ pc->data_size);
break;
case GNUNET_BLOCK_EVALUATION_OK_DUPLICATE:
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop
+ ("# Duplicate REPLIES matched against routing table"),
+ 1, GNUNET_NO);
return GNUNET_OK;
case GNUNET_BLOCK_EVALUATION_RESULT_INVALID:
- GNUNET_break_op (0);
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop
+ ("# Invalid REPLIES matched against routing table"),
+ 1, GNUNET_NO);
return GNUNET_SYSERR;
+ case GNUNET_BLOCK_EVALUATION_RESULT_IRRELEVANT:
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop
+ ("# Irrelevant REPLIES matched against routing table"),
+ 1, GNUNET_NO);
+ return GNUNET_OK;
case GNUNET_BLOCK_EVALUATION_REQUEST_VALID:
+ GNUNET_break (0);
+ return GNUNET_OK;
case GNUNET_BLOCK_EVALUATION_REQUEST_INVALID:
GNUNET_break (0);
return GNUNET_OK;
case GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED:
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop
+ ("# Unsupported REPLIES matched against routing table"),
+ 1, GNUNET_NO);
return GNUNET_SYSERR;
default:
GNUNET_break (0);
- return GNUNET_SYSERR;
+ return GNUNET_SYSERR;
}
return GNUNET_OK;
}
* @param key key for the content
* @param put_path_length number of entries in put_path
* @param put_path peers the original PUT traversed (if tracked)
- * @param get_path_length number of entries in put_path
+ * @param get_path_length number of entries in get_path
* @param get_path peers this reply has traversed so far (if tracked)
* @param data payload of the reply
* @param data_size number of bytes in data
*/
void
GDS_ROUTING_process (enum GNUNET_BLOCK_Type type,
- struct GNUNET_TIME_Absolute expiration_time,
- const GNUNET_HashCode *key,
- unsigned int put_path_length,
- const struct GNUNET_PeerIdentity *put_path,
- unsigned int get_path_length,
- const struct GNUNET_PeerIdentity *get_path,
- const void *data,
- size_t data_size)
+ struct GNUNET_TIME_Absolute expiration_time,
+ const struct GNUNET_HashCode * key, unsigned int put_path_length,
+ const struct GNUNET_PeerIdentity *put_path,
+ unsigned int get_path_length,
+ const struct GNUNET_PeerIdentity *get_path,
+ const void *data, size_t data_size)
{
struct ProcessContext pc;
pc.get_path = get_path;
pc.data = data;
pc.data_size = data_size;
- GNUNET_CONTAINER_multihashmap_get_multiple (recent_map,
- key,
- &process,
- &pc);
+ if (NULL == data)
+ {
+ /* Some apps might have an 'empty' reply as a valid reply; however,
+ 'process' will call GNUNET_BLOCK_evaluate' which treats a 'NULL'
+ reply as request-validation (but we need response-validation).
+ So we set 'data' to a 0-byte non-NULL value just to be sure */
+ GNUNET_break (0 == data_size);
+ pc.data_size = 0;
+ pc.data = ""; /* something not null */
+ }
+ GNUNET_CONTAINER_multihashmap_get_multiple (recent_map, key, &process, &pc);
+}
+
+
+/**
+ * Remove the oldest entry from the DHT routing table. Must only
+ * be called if it is known that there is at least one entry
+ * in the heap and hashmap.
+ */
+static void
+expire_oldest_entry ()
+{
+ struct RecentRequest *recent_req;
+
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop
+ ("# Entries removed from routing table"), 1,
+ GNUNET_NO);
+ recent_req = GNUNET_CONTAINER_heap_peek (recent_heap);
+ GNUNET_assert (recent_req != NULL);
+ GNUNET_CONTAINER_heap_remove_node (recent_req->heap_node);
+ GNUNET_CONTAINER_bloomfilter_free (recent_req->reply_bf);
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_remove (recent_map,
+ &recent_req->key,
+ recent_req));
+ GNUNET_free (recent_req);
+}
+
+
+/**
+ * Try to combine multiple recent requests for the same value
+ * (if they come from the same peer).
+ *
+ * @param cls the new 'struct RecentRequest' (to discard upon successful combination)
+ * @param key the query
+ * @param value the existing 'struct RecentRequest' (to update upon successful combination)
+ * @return GNUNET_OK (continue to iterate),
+ * GNUNET_SYSERR if the request was successfully combined
+ */
+static int
+try_combine_recent (void *cls, const struct GNUNET_HashCode * key, void *value)
+{
+ struct RecentRequest *in = cls;
+ struct RecentRequest *rr = value;
+
+ if ( (0 != memcmp (&in->peer,
+ &rr->peer,
+ sizeof (struct GNUNET_PeerIdentity))) ||
+ (in->type != rr->type) ||
+ (in->xquery_size != rr->xquery_size) ||
+ (0 != memcmp (in->xquery,
+ rr->xquery,
+ in->xquery_size)) )
+ return GNUNET_OK;
+ if (in->reply_bf_mutator != rr->reply_bf_mutator)
+ {
+ rr->reply_bf_mutator = in->reply_bf_mutator;
+ GNUNET_CONTAINER_bloomfilter_free (rr->reply_bf);
+ rr->reply_bf = in->reply_bf;
+ }
+ else
+ {
+ GNUNET_CONTAINER_bloomfilter_or2 (rr->reply_bf,
+ in->reply_bf);
+ GNUNET_CONTAINER_bloomfilter_free (in->reply_bf);
+ }
+ GNUNET_free (in);
+ return GNUNET_SYSERR;
}
* @param options options for processing
* @param key key for the content
* @param xquery extended query
- * @param xquery_size number of bytes in xquery
+ * @param xquery_size number of bytes in @a xquery
* @param reply_bf bloomfilter to filter duplicates
- * @param reply_bf_mutator mutator for reply_bf
-*/
+ * @param reply_bf_mutator mutator for @a reply_bf
+ */
void
GDS_ROUTING_add (const struct GNUNET_PeerIdentity *sender,
- enum GNUNET_BLOCK_Type type,
- enum GNUNET_DHT_RouteOption options,
- const GNUNET_HashCode *key,
- const void *xquery,
- size_t xquery_size,
- const struct GNUNET_CONTAINER_BloomFilter *reply_bf,
- uint32_t reply_bf_mutator)
+ enum GNUNET_BLOCK_Type type,
+ enum GNUNET_DHT_RouteOption options,
+ const struct GNUNET_HashCode * key, const void *xquery,
+ size_t xquery_size,
+ const struct GNUNET_CONTAINER_BloomFilter *reply_bf,
+ uint32_t reply_bf_mutator)
{
struct RecentRequest *recent_req;
while (GNUNET_CONTAINER_heap_get_size (recent_heap) >= DHT_MAX_RECENT)
- {
- recent_req = GNUNET_CONTAINER_heap_peek (recent_heap);
- GNUNET_assert (recent_req != NULL);
- GNUNET_CONTAINER_heap_remove_node (recent_req->heap_node);
- GNUNET_CONTAINER_bloomfilter_free (recent_req->reply_bf);
- GNUNET_free (recent_req);
- }
-
+ expire_oldest_entry ();
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop ("# Entries added to routing table"),
+ 1, GNUNET_NO);
recent_req = GNUNET_malloc (sizeof (struct RecentRequest) + xquery_size);
recent_req->peer = *sender;
recent_req->key = *key;
- recent_req->heap_node =
- GNUNET_CONTAINER_heap_insert (recent_heap, recent_req,
- GNUNET_TIME_absolute_get ().abs_value);
- recent_req->reply_bf =
- GNUNET_CONTAINER_bloomfilter_copy (reply_bf);
+ recent_req->reply_bf = GNUNET_CONTAINER_bloomfilter_copy (reply_bf);
recent_req->type = type;
recent_req->options = options;
recent_req->xquery = &recent_req[1];
+ memcpy (&recent_req[1], xquery, xquery_size);
recent_req->xquery_size = xquery_size;
recent_req->reply_bf_mutator = reply_bf_mutator;
- GNUNET_CONTAINER_multihashmap_put (recent_map,
- key,
- recent_req,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
+ if (GNUNET_SYSERR ==
+ GNUNET_CONTAINER_multihashmap_get_multiple (recent_map, key,
+ &try_combine_recent, recent_req))
+ {
+ GNUNET_STATISTICS_update (GDS_stats,
+ gettext_noop
+ ("# DHT requests combined"),
+ 1, GNUNET_NO);
+ return;
+ }
+ recent_req->heap_node =
+ GNUNET_CONTAINER_heap_insert (recent_heap, recent_req,
+ GNUNET_TIME_absolute_get ().abs_value_us);
+ GNUNET_CONTAINER_multihashmap_put (recent_map, key, recent_req,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
}
void
GDS_ROUTING_init ()
{
- recent_heap =
- GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
- recent_map =
- GNUNET_CONTAINER_multihashmap_create (DHT_MAX_RECENT * 4 / 3);
+ recent_heap = GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
+ recent_map = GNUNET_CONTAINER_multihashmap_create (DHT_MAX_RECENT * 4 / 3, GNUNET_NO);
}
void
GDS_ROUTING_done ()
{
- struct RecentRequest *recent_req;
-
while (GNUNET_CONTAINER_heap_get_size (recent_heap) > 0)
- {
- recent_req = GNUNET_CONTAINER_heap_peek (recent_heap);
- GNUNET_assert (recent_req != NULL);
- GNUNET_CONTAINER_heap_remove_node (recent_req->heap_node);
- GNUNET_CONTAINER_bloomfilter_free (recent_req->reply_bf);
- GNUNET_free (recent_req);
- }
+ expire_oldest_entry ();
GNUNET_assert (0 == GNUNET_CONTAINER_heap_get_size (recent_heap));
GNUNET_CONTAINER_heap_destroy (recent_heap);
recent_heap = NULL;
+ GNUNET_assert (0 == GNUNET_CONTAINER_multihashmap_size (recent_map));
GNUNET_CONTAINER_multihashmap_destroy (recent_map);
recent_map = NULL;
}
projects / oweals / gnunet.git / blobdiff