}
+/**
+ * Send traffic metric message to the service.
+ *
+ * @param cls the message to send
+ * @param size number of bytes available in buf
+ * @param buf where to copy the message
+ * @return number of bytes copied to buf
+ */
+static size_t
+send_metric (void *cls, size_t size, void *buf)
+{
+ struct TrafficMetricMessage *msg = cls;
+ uint16_t ssize;
+ if (buf == NULL)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Timeout while trying to transmit `%s' request.\n", "TRAFFIC_METRIC");
+ GNUNET_free (msg);
+ return 0;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Transmitting `%s' request.\n", "TRAFFIC_METRIC");
+ ssize = ntohs (msg->header.size);
+ GNUNET_assert (size >= ssize);
+ memcpy (buf, msg, ssize);
+ GNUNET_free (msg);
+ return ssize;
+}
+
+
+/**
+ * Set transport metrics for a peer and a direction
+ *
+ * @param handle transport handle
+ * @param peer the peer to set the metric for
+ * @param inbound set inbound direction (GNUNET_YES or GNUNET_NO)
+ * @param outbound set outbound direction (GNUNET_YES or GNUNET_NO)
+ * @param ats the metric as ATS information
+ * @param ats_count the number of metrics
+ *
+ * Supported ATS values:
+ * GNUNET_ATS_QUALITY_NET_DELAY (value in ms)
+ * GNUNET_ATS_QUALITY_NET_DISTANCE (value in count(hops))
+ *
+ * Example
+ * To enforce a delay of 10 ms for peer p1 in sending direction use:
+ *
+ * struct GNUNET_ATS_Information ats;
+ * ats.type = ntohl (GNUNET_ATS_QUALITY_NET_DELAY);
+ * ats.value = ntohl (10);
+ * GNUNET_TRANSPORT_set_traffic_metric (th, p1, TM_SEND, &ats, 1);
+ *
+ * Note:
+ * Delay restrictions in receiving direction will be enforced with
+ * 1 message delay.
+ */
+void
+GNUNET_TRANSPORT_set_traffic_metric (struct GNUNET_TRANSPORT_Handle *handle,
+ const struct GNUNET_PeerIdentity *peer,
+ int inbound,
+ int outbound,
+ const struct GNUNET_ATS_Information *ats,
+ size_t ats_count)
+{
+ struct TrafficMetricMessage *msg;
+
+ GNUNET_assert (NULL != handle);
+ GNUNET_assert (NULL != peer);
+ GNUNET_assert ((outbound == GNUNET_YES) || (outbound == GNUNET_NO));
+ GNUNET_assert ((inbound == GNUNET_YES) || (inbound == GNUNET_NO));
+
+ if ((GNUNET_NO == inbound) && (GNUNET_NO == outbound))
+ return;
+ if (0 == ats_count)
+ return;
+
+ size_t len = sizeof (struct TrafficMetricMessage) +
+ ats_count * sizeof (struct GNUNET_ATS_Information);
+
+ msg = GNUNET_malloc (len);
+ msg->header.size = htons (len);
+ msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_TRAFFIC_METRIC);
+ msg->direction = htons (0 + outbound + 2 * inbound);
+ msg->ats_count = htons (ats_count);
+ msg->peer = (*peer);
+ memcpy (&msg[1], ats, ats_count * sizeof (struct GNUNET_ATS_Information));
+ schedule_control_transmit (handle, len, &send_metric, msg);
+}
+
+
+
/**
* Offer the transport service the HELLO of another peer. Note that
* the transport service may just ignore this message if the HELLO is