*/
GNUNET_TRANSPORT_HelloUpdateCallback rec;
+ /**
+ * Task for calling the HelloUpdateCallback when we already have a HELLO
+ */
+ GNUNET_SCHEDULER_TaskIdentifier notify_task;
+
/**
* Closure for rec.
*/
};
+/**
+ * Linked list for all try-connect requests
+ */
+struct GNUNET_TRANSPORT_TryConnectHandle
+{
+ struct GNUNET_TRANSPORT_TryConnectHandle *prev;
+ struct GNUNET_TRANSPORT_TryConnectHandle *next;
+
+ struct GNUNET_PeerIdentity pid;
+
+ struct GNUNET_TRANSPORT_Handle *th;
+ struct GNUNET_TRANSPORT_TransmitHandle *tth;
+ GNUNET_TRANSPORT_TryConnectCallback cb;
+ void *cb_cls;
+};
+
+
+/**
+ * Linked list for all try-connect requests
+ */
+struct GNUNET_TRANSPORT_OfferHelloHandle
+{
+ struct GNUNET_TRANSPORT_OfferHelloHandle *prev;
+ struct GNUNET_TRANSPORT_OfferHelloHandle *next;
+
+ struct GNUNET_TRANSPORT_Handle *th;
+
+ struct GNUNET_TRANSPORT_TransmitHandle *tth;
+ GNUNET_SCHEDULER_Task cont;
+
+ void *cls;
+
+ struct GNUNET_MessageHeader *msg;
+};
+
/**
* Handle for the transport service (includes all of the
*/
struct GNUNET_TRANSPORT_GetHelloHandle *hwl_tail;
+ /**
+ * Linked list of pending try connect requests head
+ */
+ struct GNUNET_TRANSPORT_TryConnectHandle *tc_head;
+
+ /**
+ * Linked list of pending try connect requests tail
+ */
+ struct GNUNET_TRANSPORT_TryConnectHandle *tc_tail;
+
+ /**
+ * Linked list of pending offer HELLO requests head
+ */
+ struct GNUNET_TRANSPORT_OfferHelloHandle *oh_head;
+
+ /**
+ * Linked list of pending offer HELLO requests tail
+ */
+ struct GNUNET_TRANSPORT_OfferHelloHandle *oh_tail;
+
/**
* My configuration.
*/
};
+
/**
* Schedule the task to send one message, either from the control
* list or the peer message queues to the service.
* @param size number of bytes to be transmitted
* @param notify function to call to get the content
* @param notify_cls closure for notify
+ * @return a GNUNET_TRANSPORT_TransmitHandle
*/
-static void
+static struct GNUNET_TRANSPORT_TransmitHandle *
schedule_control_transmit (struct GNUNET_TRANSPORT_Handle *h, size_t size,
GNUNET_CONNECTION_TransmitReadyNotify notify,
void *notify_cls)
th->notify_size = size;
GNUNET_CONTAINER_DLL_insert_tail (h->control_head, h->control_tail, th);
schedule_transmission (h);
+ return th;
}
}
+/**
+ * Cancel control request for transmission to the transport service.
+ *
+ * @param th handle to the transport service
+ * @param tth transmit handle to cancel
+ */
+static void
+cancel_control_transmit (struct GNUNET_TRANSPORT_Handle *th, struct GNUNET_TRANSPORT_TransmitHandle *tth)
+{
+ GNUNET_assert (NULL != th);
+ GNUNET_assert (NULL != tth);
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Canceling transmit of contral transmission requested\n");
+
+ GNUNET_CONTAINER_DLL_remove (th->control_head, th->control_tail, tth);
+ GNUNET_free (tth);
+}
+
+
+
/**
* Send REQUEST_CONNECT message to the service.
*
static size_t
send_try_connect (void *cls, size_t size, void *buf)
{
- struct GNUNET_PeerIdentity *pid = cls;
+ struct GNUNET_TRANSPORT_TryConnectHandle *tch = cls;
struct TransportRequestConnectMessage msg;
if (buf == NULL)
{
- GNUNET_free (pid);
+ if (NULL != tch->cb)
+ tch->cb (tch->cb_cls, GNUNET_SYSERR);
+ GNUNET_CONTAINER_DLL_remove (tch->th->tc_head, tch->th->tc_tail, tch);
+ GNUNET_free (tch);
return 0;
}
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Transmitting `%s' request with respect to `%4s'.\n", "REQUEST_CONNECT",
- GNUNET_i2s (pid));
+ GNUNET_i2s (&tch->pid));
GNUNET_assert (size >= sizeof (struct TransportRequestConnectMessage));
msg.header.size = htons (sizeof (struct TransportRequestConnectMessage));
msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT);
msg.reserved = htonl (0);
- msg.peer = *pid;
+ msg.peer = tch->pid;
memcpy (buf, &msg, sizeof (msg));
- GNUNET_free (pid);
+ if (NULL != tch->cb)
+ tch->cb (tch->cb_cls, GNUNET_OK);
+ GNUNET_CONTAINER_DLL_remove (tch->th->tc_head, tch->th->tc_tail, tch);
+ GNUNET_free (tch);
return sizeof (struct TransportRequestConnectMessage);
}
*
* @param handle connection to transport service
* @param target who we should try to connect to
- * @return GNUNET_OK if request can be scheduled
- * GNUNET_NO please retry later because we are reconnecting
- * GNUNET_SYSERR on failure
+ * @param cb callback to be called when request was transmitted to transport
+ * service
+ * @param cb_cls closure for the callback
+ * @return a GNUNET_TRANSPORT_TryConnectHandle handle or
+ * NULL on failure (cb will not be called)
*/
-int
+struct GNUNET_TRANSPORT_TryConnectHandle *
GNUNET_TRANSPORT_try_connect (struct GNUNET_TRANSPORT_Handle *handle,
- const struct GNUNET_PeerIdentity *target)
+ const struct GNUNET_PeerIdentity *target,
+ GNUNET_TRANSPORT_TryConnectCallback cb,
+ void *cb_cls)
{
- struct GNUNET_PeerIdentity *pid;
- if (NULL == handle->client)
- {
- if (GNUNET_SCHEDULER_NO_TASK == handle->reconnect_task)
- return GNUNET_SYSERR; /* this should never happen */
- else
- return GNUNET_NO; /* please retry */
- }
+ struct GNUNET_TRANSPORT_TryConnectHandle *tch = NULL;
- pid = GNUNET_malloc (sizeof (struct GNUNET_PeerIdentity));
- *pid = *target;
- schedule_control_transmit (handle,
+ if (NULL == handle->client)
+ return NULL;
+
+ tch = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_TryConnectHandle));
+ tch->th = handle;
+ tch->pid = *(target);
+ tch->cb = cb;
+ tch->cb_cls = cb_cls;
+ tch->tth = schedule_control_transmit (handle,
sizeof (struct TransportRequestConnectMessage),
- &send_try_connect, pid);
- return GNUNET_OK;
+ &send_try_connect, tch);
+ GNUNET_CONTAINER_DLL_insert(handle->tc_head, handle->tc_tail, tch);
+ return tch;
}
-struct SendHelloContext
+/**
+ * Cancel the request to transport to try a connect
+ * Callback will not be called
+ *
+ * @param tch GNUNET_TRANSPORT_TryConnectHandle handle to cancel
+ */
+void
+GNUNET_TRANSPORT_try_connect_cancel (struct GNUNET_TRANSPORT_TryConnectHandle *tch)
{
- GNUNET_SCHEDULER_Task cont;
-
- void *cls;
+ struct GNUNET_TRANSPORT_Handle *th;
+ GNUNET_assert (NULL != tch);
- struct GNUNET_MessageHeader *msg;
-};
+ th = tch->th;
+ cancel_control_transmit (th, tch->tth);
+ GNUNET_CONTAINER_DLL_remove (th->tc_head, th->tc_tail, tch);
+ GNUNET_free (tch);
+}
/**
* Send HELLO message to the service.
static size_t
send_hello (void *cls, size_t size, void *buf)
{
- struct SendHelloContext *shc = cls;
- struct GNUNET_MessageHeader *msg = shc->msg;
+ struct GNUNET_TRANSPORT_OfferHelloHandle *ohh = cls;
+ struct GNUNET_MessageHeader *msg = ohh->msg;
uint16_t ssize;
struct GNUNET_SCHEDULER_TaskContext tc;
tc.read_ready = NULL;
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Timeout while trying to transmit `%s' request.\n", "HELLO");
- if (NULL != shc->cont)
- shc->cont (shc->cls, &tc);
+ if (NULL != ohh->cont)
+ ohh->cont (ohh->cls, &tc);
GNUNET_free (msg);
- GNUNET_free (shc);
+ GNUNET_CONTAINER_DLL_remove (ohh->th->oh_head, ohh->th->oh_tail, ohh);
+ GNUNET_free (ohh);
return 0;
}
LOG (GNUNET_ERROR_TYPE_DEBUG, "Transmitting `%s' request.\n", "HELLO");
memcpy (buf, msg, ssize);
GNUNET_free (msg);
tc.reason = GNUNET_SCHEDULER_REASON_READ_READY;
- if (NULL != shc->cont)
- shc->cont (shc->cls, &tc);
- GNUNET_free (shc);
+ if (NULL != ohh->cont)
+ ohh->cont (ohh->cls, &tc);
+ GNUNET_CONTAINER_DLL_remove (ohh->th->oh_head, ohh->th->oh_tail, ohh);
+ GNUNET_free (ohh);
+ return ssize;
+}
+
+
+/**
+ * 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 direction can be: TM_SEND, TM_RECV, TM_BOTH
+ * @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 #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 direction,
+ const struct GNUNET_ATS_Information *ats,
+ size_t ats_count)
+{
+ struct TrafficMetricMessage *msg;
+
+ GNUNET_assert (NULL != handle);
+ GNUNET_assert (NULL != peer);
+ GNUNET_assert (direction >= TM_SEND);
+ GNUNET_assert (direction <= TM_BOTH);
+
+ 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 (direction);
+ 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
* @param hello the hello message
* @param cont continuation to call when HELLO has been sent,
* tc reason GNUNET_SCHEDULER_REASON_TIMEOUT for fail
- * tc reasong GNUNET_SCHEDULER_REASON_READY for success
+ * tc reasong GNUNET_SCHEDULER_REASON_READ_READY for success
* @param cls closure for continuation
+ * @return a GNUNET_TRANSPORT_OfferHelloHandle handle or NULL on failure,
+ * in case of failure cont will not be called
*
*/
-void
+struct GNUNET_TRANSPORT_OfferHelloHandle *
GNUNET_TRANSPORT_offer_hello (struct GNUNET_TRANSPORT_Handle *handle,
const struct GNUNET_MessageHeader *hello,
GNUNET_SCHEDULER_Task cont, void *cls)
{
- uint16_t size;
- struct GNUNET_PeerIdentity peer;
+ struct GNUNET_TRANSPORT_OfferHelloHandle *ohh;
struct GNUNET_MessageHeader *msg;
- struct SendHelloContext * shc;
- struct GNUNET_SCHEDULER_TaskContext tc;
+ struct GNUNET_PeerIdentity peer;
+ uint16_t size;
- tc.read_ready = NULL;
- tc.write_ready = NULL;
- tc.reason = GNUNET_SCHEDULER_REASON_TIMEOUT;
+ GNUNET_assert (NULL != handle);
+ GNUNET_assert (NULL != hello);
if (NULL == handle->client)
- {
- if (NULL != cont)
- cont (cls, &tc);
- return;
- }
+ return NULL;
+
GNUNET_break (ntohs (hello->type) == GNUNET_MESSAGE_TYPE_HELLO);
size = ntohs (hello->size);
GNUNET_break (size >= sizeof (struct GNUNET_MessageHeader));
GNUNET_HELLO_get_id ((const struct GNUNET_HELLO_Message *) hello, &peer))
{
GNUNET_break (0);
- if (NULL != cont)
- if (NULL != cont)
- cont (cls, &tc);
- return;
+ return NULL;
}
+
msg = GNUNET_malloc (size);
memcpy (msg, hello, size);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Offering `%s' message of `%4s' to transport for validation.\n", "HELLO",
GNUNET_i2s (&peer));
- shc = GNUNET_malloc (sizeof (struct SendHelloContext));
- shc->msg = msg;
- shc->cont = cont;
- shc->cls = cls;
- schedule_control_transmit (handle, size, &send_hello, shc);
+
+ ohh = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_OfferHelloHandle));
+ ohh->th = handle;
+ ohh->cont = cont;
+ ohh->cls = cls;
+ ohh->msg = msg;
+ ohh->tth = schedule_control_transmit (handle, size, &send_hello, ohh);
+ GNUNET_CONTAINER_DLL_insert (handle->oh_head, handle->oh_tail, ohh);
+ return ohh;
+}
+
+
+/**
+ * Cancel the request to transport to offer the HELLO message
+ *
+ * @param ohh the GNUNET_TRANSPORT_OfferHelloHandle to cancel
+ */
+void
+GNUNET_TRANSPORT_offer_hello_cancel (struct GNUNET_TRANSPORT_OfferHelloHandle *ohh)
+{
+ struct GNUNET_TRANSPORT_Handle *th = ohh->th;
+ GNUNET_assert (NULL != ohh);
+
+ cancel_control_transmit (ohh->th, ohh->tth);
+ GNUNET_CONTAINER_DLL_remove (th->oh_head, th->oh_tail, ohh);
+ GNUNET_free (ohh->msg);
+ GNUNET_free (ohh);
+}
+
+int
+GNUNET_TRANSPORT_check_neighbour_connected (struct GNUNET_TRANSPORT_Handle *handle,
+ const struct GNUNET_PeerIdentity *peer)
+{
+ GNUNET_assert (NULL != handle);
+ GNUNET_assert (NULL != peer);
+
+ if (GNUNET_YES == GNUNET_CONTAINER_multihashmap_contains(handle->neighbours, &peer->hashPubKey))
+ return GNUNET_YES;
+ else
+ return GNUNET_NO;
+}
+
+
+/**
+ * Task to call the HelloUpdateCallback of the GetHelloHandle
+ *
+ * @param cls the GetHelloHandle
+ * @param tc the scheduler task context
+ */
+static void
+call_hello_update_cb_async (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_TRANSPORT_GetHelloHandle *ghh = cls;
+
+ GNUNET_assert (NULL != ghh->handle->my_hello);
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != ghh->notify_task);
+ ghh->notify_task = GNUNET_SCHEDULER_NO_TASK;
+ ghh->rec (ghh->rec_cls,
+ (const struct GNUNET_MessageHeader *) ghh->handle->my_hello);
}
/**
- * Obtain the HELLO message for this peer.
+ * Obtain the HELLO message for this peer. The callback given in this function
+ * is never called synchronously.
*
* @param handle connection to transport service
* @param rec function to call with the HELLO, sender will be our peer
hwl->handle = handle;
GNUNET_CONTAINER_DLL_insert (handle->hwl_head, handle->hwl_tail, hwl);
if (handle->my_hello != NULL)
- rec (rec_cls, (const struct GNUNET_MessageHeader *) handle->my_hello);
+ hwl->notify_task = GNUNET_SCHEDULER_add_now (&call_hello_update_cb_async,
+ hwl);
return hwl;
}
{
struct GNUNET_TRANSPORT_Handle *handle = ghh->handle;
+ if (GNUNET_SCHEDULER_NO_TASK != ghh->notify_task)
+ GNUNET_SCHEDULER_cancel (ghh->notify_task);
GNUNET_CONTAINER_DLL_remove (handle->hwl_head, handle->hwl_tail, ghh);
GNUNET_free (ghh);
}
}
GNUNET_free_non_null (handle->my_hello);
handle->my_hello = NULL;
+ GNUNET_assert (handle->tc_head == NULL);
+ GNUNET_assert (handle->tc_tail == NULL);
GNUNET_assert (handle->hwl_head == NULL);
GNUNET_assert (handle->hwl_tail == NULL);
GNUNET_CONTAINER_heap_destroy (handle->ready_heap);
projects / oweals / gnunet.git / blobdiff