/*
This file is part of GNUnet.
- (C) 2009-2013 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2009-2013 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
struct Neighbour *neighbour;
/**
- * Function to call when notify_size bytes are available
+ * Function to call when @e notify_size bytes are available
* for transmission.
*/
GNUNET_TRANSPORT_TransmitReadyNotify notify;
/**
- * Closure for notify.
+ * Closure for @e notify.
*/
void *notify_cls;
* Task to trigger request timeout if the request is stalled due to
* congestion.
*/
- GNUNET_SCHEDULER_TaskIdentifier timeout_task;
+ struct GNUNET_SCHEDULER_Task * timeout_task;
/**
* How many bytes is our notify callback waiting for?
/**
- * Entry in hash table of all of our current neighbours.
+ * Entry in hash table of all of our current (connected) neighbours.
*/
struct Neighbour
{
struct GNUNET_BANDWIDTH_Tracker out_tracker;
/**
- * Entry in our readyness heap (which is sorted by 'next_ready'
+ * Entry in our readyness heap (which is sorted by @e next_ready
* value). NULL if there is no pending transmission request for
- * this neighbour or if we're waiting for 'is_ready' to become
- * true AFTER the 'out_tracker' suggested that this peer's quota
- * has been satisfied (so once 'is_ready' goes to GNUNET_YES,
+ * this neighbour or if we're waiting for @e is_ready to become
+ * true AFTER the @e out_tracker suggested that this peer's quota
+ * has been satisfied (so once @e is_ready goes to #GNUNET_YES,
* we should immediately go back into the heap).
*/
struct GNUNET_CONTAINER_HeapNode *hn;
/**
* Task for calling the HelloUpdateCallback when we already have a HELLO
*/
- GNUNET_SCHEDULER_TaskIdentifier notify_task;
+ struct GNUNET_SCHEDULER_Task * notify_task;
/**
* Closure for @e rec.
};
+
/**
- * Linked list for all try-connect requests
+ * Entry in linked list for a try-connect request.
*/
struct GNUNET_TRANSPORT_TryConnectHandle
{
*/
struct GNUNET_TRANSPORT_TryConnectHandle *next;
+ /**
+ * Peer we should try to connect to.
+ */
struct GNUNET_PeerIdentity pid;
+ /**
+ * Transport service handle this request is part of.
+ */
struct GNUNET_TRANSPORT_Handle *th;
+ /**
+ * Message transmission request to communicate to service.
+ */
struct GNUNET_TRANSPORT_TransmitHandle *tth;
+ /**
+ * Function to call upon completion (of request transmission).
+ */
GNUNET_TRANSPORT_TryConnectCallback cb;
/**
* Closure for @e cb.
*/
void *cb_cls;
+
+};
+
+
+/**
+ * Entry in linked list for all try-disconnect requests
+ */
+struct GNUNET_TRANSPORT_TryDisconnectHandle
+{
+ /**
+ * For the DLL.
+ */
+ struct GNUNET_TRANSPORT_TryDisconnectHandle *prev;
+
+ /**
+ * For the DLL.
+ */
+ struct GNUNET_TRANSPORT_TryDisconnectHandle *next;
+
+ /**
+ * Peer we should try to connect to.
+ */
+ struct GNUNET_PeerIdentity pid;
+
+ /**
+ * Transport service handle this request is part of.
+ */
+ struct GNUNET_TRANSPORT_Handle *th;
+
+ /**
+ * Message transmission request to communicate to service.
+ */
+ struct GNUNET_TRANSPORT_TransmitHandle *tth;
+
+ /**
+ * Function to call upon completion (of request transmission).
+ */
+ GNUNET_TRANSPORT_TryDisconnectCallback cb;
+
+ /**
+ * Closure for @e cb.
+ */
+ void *cb_cls;
+
};
/**
- * Linked list for all try-connect requests
+ * Entry in linked list for all offer-HELLO requests.
*/
struct GNUNET_TRANSPORT_OfferHelloHandle
{
*/
struct GNUNET_TRANSPORT_OfferHelloHandle *next;
+ /**
+ * Transport service handle we use for transmission.
+ */
struct GNUNET_TRANSPORT_Handle *th;
+ /**
+ * Transmission handle for this request.
+ */
struct GNUNET_TRANSPORT_TransmitHandle *tth;
- GNUNET_SCHEDULER_Task cont;
+ /**
+ * Function to call once we are done.
+ */
+ GNUNET_SCHEDULER_TaskCallback cont;
/**
* Closure for @e cont
*/
void *cls;
+ /**
+ * The HELLO message to be transmitted.
+ */
struct GNUNET_MessageHeader *msg;
};
*/
struct GNUNET_TRANSPORT_TryConnectHandle *tc_tail;
+ /**
+ * Linked list of pending try disconnect requests head
+ */
+ struct GNUNET_TRANSPORT_TryDisconnectHandle *td_head;
+
+ /**
+ * Linked list of pending try connect requests tail
+ */
+ struct GNUNET_TRANSPORT_TryDisconnectHandle *td_tail;
+
/**
* Linked list of pending offer HELLO requests head
*/
/**
* ID of the task trying to reconnect to the service.
*/
- GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
+ struct GNUNET_SCHEDULER_Task * reconnect_task;
/**
* ID of the task trying to trigger transmission for a peer while
* messages and the smallest entry in the 'ready_heap' has a time
* stamp in the future.
*/
- GNUNET_SCHEDULER_TaskIdentifier quota_task;
+ struct GNUNET_SCHEDULER_Task * quota_task;
/**
* Delay until we try to reconnect.
};
-
/**
* Schedule the task to send one message, either from the control
* list or the peer message queues to the service.
}
-
+/**
+ * The outbound quota has changed in a way that may require
+ * us to reset the timeout. Update the timeout.
+ *
+ * @param cls the `struct Neighbour` for which the timeout changed
+ */
static void
outbound_bw_tracker_update (void *cls)
{
struct Neighbour *n = cls;
struct GNUNET_TIME_Relative delay;
+
if (NULL == n->hn)
return;
-
delay = GNUNET_BANDWIDTH_tracker_get_delay (&n->out_tracker,
- n->th->notify_size + n->traffic_overhead);
- LOG(GNUNET_ERROR_TYPE_DEBUG,
- "New outbound delay %llu us\n",delay.rel_value_us);
+ n->th->notify_size + n->traffic_overhead);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "New outbound delay %llu us\n",
+ GNUNET_STRINGS_relative_time_to_string (delay,
+ GNUNET_NO));
GNUNET_CONTAINER_heap_update_cost (n->h->ready_heap,
n->hn, delay.rel_value_us);
schedule_transmission (n->h);
GNUNET_assert (GNUNET_YES ==
GNUNET_CONTAINER_multipeermap_remove (handle->neighbours, key,
n));
+ GNUNET_BANDWIDTH_tracker_notification_stop (&n->out_tracker);
GNUNET_free (n);
return GNUNET_YES;
}
-static int reconnecting;
/**
* Function we use for handling incoming messages.
* @param msg message received, NULL on timeout or fatal error
*/
static void
-demultiplexer (void *cls, const struct GNUNET_MessageHeader *msg)
+demultiplexer (void *cls,
+ const struct GNUNET_MessageHeader *msg)
{
struct GNUNET_TRANSPORT_Handle *h = cls;
const struct DisconnectInfoMessage *dim;
uint32_t bytes_physical;
GNUNET_assert (NULL != h->client);
- if (GNUNET_YES == reconnecting)
+ if (GNUNET_YES == h->reconnecting)
{
return;
}
{
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Error receiving from transport service, disconnecting temporarily.\n");
- reconnecting = GNUNET_YES;
+ h->reconnecting = GNUNET_YES;
disconnect_and_schedule_reconnect (h);
return;
}
"CONNECT",
GNUNET_i2s (&cim->id),
ntohl (cim->quota_out.value__));
- GNUNET_BANDWIDTH_tracker_update_quota (&n->out_tracker, cim->quota_out);
+ GNUNET_BANDWIDTH_tracker_update_quota (&n->out_tracker,
+ cim->quota_out);
if (h->nc_cb != NULL)
h->nc_cb (h->cls, &n->id);
break;
if (bytes_physical >= bytes_msg)
{
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Overhead for %u byte message: %u\n",
- bytes_msg, bytes_physical - bytes_msg);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Overhead for %u byte message: %u\n",
+ bytes_msg,
+ bytes_physical - bytes_msg);
n->traffic_overhead += bytes_physical - bytes_msg;
}
GNUNET_break (GNUNET_NO == n->is_ready);
n->is_ready = GNUNET_YES;
if ((NULL != n->th) && (NULL == n->hn))
{
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != n->th->timeout_task);
+ GNUNET_assert (NULL != n->th->timeout_task);
GNUNET_SCHEDULER_cancel (n->th->timeout_task);
- n->th->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ n->th->timeout_task = NULL;
/* we've been waiting for this (congestion, not quota,
* caused delayed transmission) */
n->hn = GNUNET_CONTAINER_heap_insert (h->ready_heap, n, 0);
struct GNUNET_TRANSPORT_TransmitHandle *th = cls;
struct Neighbour *n = th->neighbour;
- n->th->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ n->th->timeout_task = NULL;
GNUNET_assert (th == n->th);
GNUNET_assert (NULL == n->hn);
n->th = NULL;
/* peer not ready, wait for notification! */
GNUNET_assert (n == GNUNET_CONTAINER_heap_remove_root (h->ready_heap));
n->hn = NULL;
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == n->th->timeout_task);
+ GNUNET_assert (NULL == n->th->timeout_task);
n->th->timeout_task =
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining
(n->th->timeout),
struct GNUNET_TRANSPORT_TransmitHandle *th;
struct Neighbour *n;
- h->quota_task = GNUNET_SCHEDULER_NO_TASK;
+ h->quota_task = NULL;
GNUNET_assert (NULL != h->client);
/* destroy all requests that have timed out */
while ((NULL != (n = GNUNET_CONTAINER_heap_peek (h->ready_heap))) &&
struct Neighbour *n;
GNUNET_assert (NULL != h->client);
- if (h->quota_task != GNUNET_SCHEDULER_NO_TASK)
+ if (h->quota_task != NULL)
{
GNUNET_SCHEDULER_cancel (h->quota_task);
- h->quota_task = GNUNET_SCHEDULER_NO_TASK;
+ h->quota_task = NULL;
}
if (NULL != h->control_head)
delay = GNUNET_TIME_UNIT_ZERO;
{
struct GNUNET_TRANSPORT_Handle *h = cls;
- h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ h->reconnect_task = NULL;
if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
{
/* shutdown, just give up */
GNUNET_assert (NULL == h->client);
GNUNET_assert (NULL == h->control_head);
GNUNET_assert (NULL == h->control_tail);
- reconnecting = GNUNET_NO;
+ h->reconnecting = GNUNET_NO;
h->client = GNUNET_CLIENT_connect ("transport", h->cfg);
GNUNET_assert (NULL != h->client);
{
struct GNUNET_TRANSPORT_TransmitHandle *th;
- GNUNET_assert (h->reconnect_task == GNUNET_SCHEDULER_NO_TASK);
+ GNUNET_assert (h->reconnect_task == NULL);
if (NULL != h->cth)
{
GNUNET_CLIENT_notify_transmit_ready_cancel (h->cth);
/* Forget about all neighbours that we used to be connected to */
GNUNET_CONTAINER_multipeermap_iterate (h->neighbours,
&neighbour_delete, h);
- if (h->quota_task != GNUNET_SCHEDULER_NO_TASK)
+ if (h->quota_task != NULL)
{
GNUNET_SCHEDULER_cancel (h->quota_task);
- h->quota_task = GNUNET_SCHEDULER_NO_TASK;
+ h->quota_task = NULL;
}
while ((NULL != (th = h->control_head)))
{
}
-
/**
- * Send REQUEST_CONNECT message to the service.
+ * Send #GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT message to the
+ * service.
*
- * @param cls the `struct GNUNET_PeerIdentity`
+ * @param cls the `struct GNUNET_TRANSPORT_TryConnectHandle`
* @param size number of bytes available in @a buf
* @param buf where to copy the message
* @return number of bytes copied to @a buf
*/
static size_t
-send_try_connect (void *cls, size_t size, void *buf)
+send_try_connect (void *cls,
+ size_t size,
+ void *buf)
{
struct GNUNET_TRANSPORT_TryConnectHandle *tch = cls;
struct TransportRequestConnectMessage msg;
- if (buf == NULL)
+ tch->tth = NULL;
+ if (NULL == buf)
{
- if (NULL != tch->cb)
- tch->cb (tch->cb_cls, GNUNET_SYSERR);
- GNUNET_CONTAINER_DLL_remove (tch->th->tc_head, tch->th->tc_tail, tch);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Discarding `%s' request to `%4s' due to error in transport service connection.\n",
"REQUEST_CONNECT",
GNUNET_i2s (&tch->pid));
- GNUNET_free (tch);
+ if (NULL != tch->cb)
+ tch->cb (tch->cb_cls,
+ GNUNET_SYSERR);
+ GNUNET_TRANSPORT_try_connect_cancel (tch);
return 0;
}
LOG (GNUNET_ERROR_TYPE_DEBUG,
memcpy (buf, &msg, sizeof (msg));
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);
+ GNUNET_TRANSPORT_try_connect_cancel (tch);
return sizeof (struct TransportRequestConnectMessage);
}
+
/**
* Ask the transport service to establish a connection to
* the given peer.
GNUNET_TRANSPORT_TryConnectCallback cb,
void *cb_cls)
{
- struct GNUNET_TRANSPORT_TryConnectHandle *tch = NULL;
+ struct GNUNET_TRANSPORT_TryConnectHandle *tch;
if (NULL == handle->client)
- return NULL;
+ return NULL;
tch = GNUNET_new (struct GNUNET_TRANSPORT_TryConnectHandle);
tch->th = handle;
- tch->pid = *(target);
+ tch->pid = *target;
tch->cb = cb;
tch->cb_cls = cb_cls;
tch->tth = schedule_control_transmit (handle,
sizeof (struct TransportRequestConnectMessage),
&send_try_connect, tch);
- GNUNET_CONTAINER_DLL_insert(handle->tc_head, handle->tc_tail, tch);
+ GNUNET_CONTAINER_DLL_insert (handle->tc_head,
+ handle->tc_tail,
+ tch);
return tch;
}
struct GNUNET_TRANSPORT_Handle *th;
th = tch->th;
- cancel_control_transmit (th, tch->tth);
- GNUNET_CONTAINER_DLL_remove (th->tc_head, th->tc_tail, tch);
+ if (NULL != tch->tth)
+ cancel_control_transmit (th, tch->tth);
+ GNUNET_CONTAINER_DLL_remove (th->tc_head,
+ th->tc_tail,
+ tch);
GNUNET_free (tch);
}
+
+/**
+ * Send #GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_DISCONNECT message to the
+ * service.
+ *
+ * @param cls the `struct GNUNET_TRANSPORT_TryDisconnectHandle`
+ * @param size number of bytes available in @a buf
+ * @param buf where to copy the message
+ * @return number of bytes copied to @a buf
+ */
+static size_t
+send_try_disconnect (void *cls,
+ size_t size,
+ void *buf)
+{
+ struct GNUNET_TRANSPORT_TryDisconnectHandle *tdh = cls;
+ struct TransportRequestConnectMessage msg;
+
+ tdh->th = NULL;
+ if (NULL == buf)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Discarding `%s' request to `%4s' due to error in transport service connection.\n",
+ "REQUEST_DISCONNECT",
+ GNUNET_i2s (&tdh->pid));
+ if (NULL != tdh->cb)
+ tdh->cb (tdh->cb_cls,
+ GNUNET_SYSERR);
+ GNUNET_TRANSPORT_try_disconnect_cancel (tdh);
+ return 0;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmitting `%s' request with respect to `%4s'.\n",
+ "REQUEST_DISCONNECT",
+ GNUNET_i2s (&tdh->pid));
+ GNUNET_assert (size >= sizeof (struct TransportRequestDisconnectMessage));
+ msg.header.size = htons (sizeof (struct TransportRequestDisconnectMessage));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_DISCONNECT);
+ msg.reserved = htonl (0);
+ msg.peer = tdh->pid;
+ memcpy (buf, &msg, sizeof (msg));
+ if (NULL != tdh->cb)
+ tdh->cb (tdh->cb_cls, GNUNET_OK);
+ GNUNET_TRANSPORT_try_disconnect_cancel (tdh);
+ return sizeof (struct TransportRequestDisconnectMessage);
+}
+
+
+/**
+ * Ask the transport service to shutdown a connection to
+ * the given peer.
+ *
+ * @param handle connection to transport service
+ * @param target who we should try to connect to
+ * @param cb callback to be called when request was transmitted to transport
+ * service
+ * @param cb_cls closure for the callback @a cb
+ * @return a `struct GNUNET_TRANSPORT_TryDisconnectHandle` handle or
+ * NULL on failure (cb will not be called)
+ */
+struct GNUNET_TRANSPORT_TryDisconnectHandle *
+GNUNET_TRANSPORT_try_disconnect (struct GNUNET_TRANSPORT_Handle *handle,
+ const struct GNUNET_PeerIdentity *target,
+ GNUNET_TRANSPORT_TryDisconnectCallback cb,
+ void *cb_cls)
+{
+ struct GNUNET_TRANSPORT_TryDisconnectHandle *tdh;
+
+ if (NULL == handle->client)
+ return NULL;
+ tdh = GNUNET_new (struct GNUNET_TRANSPORT_TryDisconnectHandle);
+ tdh->th = handle;
+ tdh->pid = *target;
+ tdh->cb = cb;
+ tdh->cb_cls = cb_cls;
+ tdh->tth = schedule_control_transmit (handle,
+ sizeof (struct TransportRequestDisconnectMessage),
+ &send_try_disconnect, tdh);
+ GNUNET_CONTAINER_DLL_insert (handle->td_head,
+ handle->td_tail,
+ tdh);
+ return tdh;
+}
+
+
+/**
+ * Cancel the request to transport to try a disconnect
+ * Callback will not be called
+ *
+ * @param tdh the handle to cancel
+ */
+void
+GNUNET_TRANSPORT_try_disconnect_cancel (struct GNUNET_TRANSPORT_TryDisconnectHandle *tdh)
+{
+ struct GNUNET_TRANSPORT_Handle *th;
+
+ th = tdh->th;
+ if (NULL != tdh->tth)
+ cancel_control_transmit (th, tdh->tth);
+ GNUNET_CONTAINER_DLL_remove (th->td_head,
+ th->td_tail,
+ tdh);
+ GNUNET_free (tdh);
+}
+
+
/**
* Send HELLO message to the service.
*
}
-
/**
* Offer the transport service the HELLO of another peer. Note that
* the transport service may just ignore this message if the HELLO is
struct GNUNET_TRANSPORT_OfferHelloHandle *
GNUNET_TRANSPORT_offer_hello (struct GNUNET_TRANSPORT_Handle *handle,
const struct GNUNET_MessageHeader *hello,
- GNUNET_SCHEDULER_Task cont, void *cls)
+ GNUNET_SCHEDULER_TaskCallback cont, void *cls)
{
struct GNUNET_TRANSPORT_OfferHelloHandle *ohh;
struct GNUNET_MessageHeader *msg;
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;
+ GNUNET_assert (NULL != ghh->notify_task);
+ ghh->notify_task = NULL;
ghh->rec (ghh->rec_cls,
(const struct GNUNET_MessageHeader *) ghh->handle->my_hello);
}
{
struct GNUNET_TRANSPORT_Handle *handle = ghh->handle;
- if (GNUNET_SCHEDULER_NO_TASK != ghh->notify_task)
+ if (NULL != ghh->notify_task)
GNUNET_SCHEDULER_cancel (ghh->notify_task);
GNUNET_CONTAINER_DLL_remove (handle->hwl_head, handle->hwl_tail, ghh);
GNUNET_free (ghh);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Transport disconnect called!\n");
/* this disconnects all neighbours... */
- if (handle->reconnect_task == GNUNET_SCHEDULER_NO_TASK)
+ if (handle->reconnect_task == NULL)
disconnect_and_schedule_reconnect (handle);
/* and now we stop trying to connect again... */
- if (handle->reconnect_task != GNUNET_SCHEDULER_NO_TASK)
+ if (handle->reconnect_task != NULL)
{
GNUNET_SCHEDULER_cancel (handle->reconnect_task);
- handle->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ handle->reconnect_task = NULL;
}
GNUNET_CONTAINER_multipeermap_destroy (handle->neighbours);
handle->neighbours = NULL;
- if (handle->quota_task != GNUNET_SCHEDULER_NO_TASK)
+ if (handle->quota_task != NULL)
{
GNUNET_SCHEDULER_cancel (handle->quota_task);
- handle->quota_task = GNUNET_SCHEDULER_NO_TASK;
+ handle->quota_task = NULL;
}
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_assert (NULL == handle->tc_head);
+ GNUNET_assert (NULL == handle->tc_tail);
+ GNUNET_assert (NULL == handle->hwl_head);
+ GNUNET_assert (NULL == handle->hwl_tail);
GNUNET_CONTAINER_heap_destroy (handle->ready_heap);
handle->ready_heap = NULL;
GNUNET_free (handle);
}
else
{
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != th->timeout_task);
+ GNUNET_assert (NULL != th->timeout_task);
GNUNET_SCHEDULER_cancel (th->timeout_task);
- th->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ th->timeout_task = NULL;
}
GNUNET_free (th);
}
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