#include "platform.h"
#include "gnunet-service-ats_reservations.h"
+/**
+ * Number of seconds that available bandwidth carries over
+ * (can accumulate).
+ */
+#define MAX_BANDWIDTH_CARRY_S 5
+
+
+/**
+ * Map of peer identities to 'struct GNUNET_BANDWIDTH_Tracker *'s
+ */
+static struct GNUNET_CONTAINER_MultiHashMap *trackers;
+
/**
* Reserve the given amount of incoming bandwidth (in bytes) from the
*/
struct GNUNET_TIME_Relative
GAS_reservations_reserve (const struct GNUNET_PeerIdentity *peer,
- int32_t amount)
+ int32_t amount)
{
- /* FIXME: implement... */
- /* permit all reservations instantly for now */
+ struct GNUNET_BANDWIDTH_Tracker *tracker;
+ struct GNUNET_TIME_Relative ret;
+
+ tracker = GNUNET_CONTAINER_multihashmap_get (trackers, &peer->hashPubKey);
+ if (NULL == tracker)
+ return GNUNET_TIME_UNIT_ZERO; /* not connected, satisfy now */
+ if (amount >= 0)
+ {
+ ret = GNUNET_BANDWIDTH_tracker_get_delay (tracker, amount);
+ if (ret.rel_value_us > 0)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Delay to satisfy reservation for %d bytes is %s\n",
+ (int) amount,
+ GNUNET_STRINGS_relative_time_to_string (ret,
+ GNUNET_YES));
+ return ret;
+ }
+ }
+ (void) GNUNET_BANDWIDTH_tracker_consume (tracker, amount);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Reserved %d bytes\n", (int) amount);
return GNUNET_TIME_UNIT_ZERO;
}
/**
* Set the amount of bandwidth the other peer could currently transmit
* to us (as far as we know) to the given value.
- *
+ *
* @param peer identity of the peer
* @param bandwidth_in currently available bandwidth from that peer to
* this peer (estimate)
*/
void
GAS_reservations_set_bandwidth (const struct GNUNET_PeerIdentity *peer,
- struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
{
+ struct GNUNET_BANDWIDTH_Tracker *tracker;
+
+ tracker = GNUNET_CONTAINER_multihashmap_get (trackers, &peer->hashPubKey);
+ if (0 == ntohl (bandwidth_in.value__))
+ {
+ if (NULL == tracker)
+ return;
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_remove (trackers,
+ &peer->hashPubKey,
+ tracker));
+ GNUNET_free (tracker);
+ return;
+ }
+ if (NULL == tracker)
+ {
+ tracker = GNUNET_malloc (sizeof (struct GNUNET_BANDWIDTH_Tracker));
+ GNUNET_BANDWIDTH_tracker_init (tracker, bandwidth_in,
+ MAX_BANDWIDTH_CARRY_S);
+ GNUNET_CONTAINER_multihashmap_put (trackers, &peer->hashPubKey, tracker,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
+ return;
+ }
+ GNUNET_BANDWIDTH_tracker_update_quota (tracker, bandwidth_in);
}
-
/**
* Initialize reservations subsystem.
*/
void
GAS_reservations_init ()
{
+ trackers = GNUNET_CONTAINER_multihashmap_create (128, GNUNET_NO);
+}
+
+
+/**
+ * Free memory of bandwidth tracker.
+ *
+ * @param cls NULL
+ * @param key peer identity (unused)
+ * @param value the 'struct GNUNET_BANDWIDTH_Tracker' to free
+ * @return GNUNET_OK (continue to iterate)
+ */
+static int
+free_tracker (void *cls, const struct GNUNET_HashCode * key, void *value)
+{
+ struct GNUNET_BANDWIDTH_Tracker *tracker = value;
+
+ GNUNET_free (tracker);
+ return GNUNET_OK;
}
void
GAS_reservations_done ()
{
+ GNUNET_CONTAINER_multihashmap_iterate (trackers, &free_tracker, NULL);
+ GNUNET_CONTAINER_multihashmap_destroy (trackers);
}
-
-
/* end of gnunet-service-ats_reservations.c */