*/
struct LCFContext
{
- /**
- * The type of this data structure. Set this to CLOSURE_TYPE_LCF
- */
- enum ClosureType type;
-
/**
* The gateway which will pass the link message to delegated host
*/
struct LCFContextQueue *prev;
};
+
+/**
+ * Notification context to be used to notify when connection to the neighbour's
+ * controller is opened
+ */
struct NeighbourConnectNotification
{
+ /**
+ * DLL next for inclusion in neighbour's list of notification requests
+ */
struct NeighbourConnectNotification *next;
+
+ /**
+ * DLL prev
+ */
struct NeighbourConnectNotification *prev;
+
+ /**
+ * The neighbour
+ */
struct Neighbour *n;
+
+ /**
+ * The notification callback to call when we are connect to neighbour
+ */
GST_NeigbourConnectNotifyCallback cb;
+
+ /**
+ * The closure for the above callback
+ */
void *cb_cls;
};
-
+
+
/**
* A connected controller which is not our child
*/
*/
struct GNUNET_TESTBED_Operation *conn_op;
+ /**
+ * DLL head for the list of notification requests
+ */
struct NeighbourConnectNotification *nl_head;
+ /**
+ * DLL tail for the list of notification requests
+ */
struct NeighbourConnectNotification *nl_tail;
+ /**
+ * Task id for the task to call notifications from the notification list
+ */
GNUNET_SCHEDULER_TaskIdentifier notify_task;
+ /**
+ * How many references are present currently to this neighbour's connection
+ */
unsigned int reference_cnt;
+ /**
+ * Is the conn_op inactivated?
+ */
unsigned int inactive;
-
/**
* The id of the host this controller is running on
*/
- uint32_t host_id;
-
+ uint32_t host_id;
};
+
+/**
+ * The neighbour list
+ */
static struct Neighbour **neighbour_list;
+
+/**
+ * The size of the neighbour list
+ */
static unsigned int neighbour_list_size;
+
+/**
+ * Context information for establishing a link to neighbour (Used is
+ * GST_handle_link_controllers()
+ */
struct NeighbourConnectCtxt
{
+ /**
+ * DLL next for inclusion in the corresponding context list
+ */
struct NeighbourConnectCtxt *next;
+
+ /**
+ * DLL tail
+ */
struct NeighbourConnectCtxt *prev;
+
+ /**
+ * The neighbour to whom connection should be made
+ */
struct Neighbour *n;
+
+ /**
+ * The client requesting the connection
+ */
struct GNUNET_SERVER_Client *client;
+
+ /**
+ * Task to be run upon timeout
+ */
GNUNET_SCHEDULER_TaskIdentifier timeout_task;
+
+ /**
+ * The notification handle associated with the neighbour's connection request
+ */
struct NeighbourConnectNotification *nh;
+
+ /**
+ * The id of the link-controllers operation responsible for creating this
+ * context
+ */
uint64_t op_id;
};
+/**
+ * DLL head for the list of neighbour connect contexts
+ */
struct NeighbourConnectCtxt *ncc_head;
+
+/**
+ * DLL tail for the list of neighbour connect contexts
+ */
struct NeighbourConnectCtxt *ncc_tail;
/**
route_list[route->dest] = route;
}
+
+/**
+ * Add a neighbour to the neighbour list. Grows the neighbour list
+ * automatically.
+ *
+ * @param n the neighbour to add
+ */
static void
neighbour_list_add (struct Neighbour *n)
{
void
GST_slave_list_clear ()
{
- unsigned int id;
struct HostRegistration *hr_entry;
+ struct GNUNET_TESTBED_ControllerProc *cproc;
+ unsigned int id;
for (id = 0; id < GST_slave_list_size; id++)
- if (NULL != GST_slave_list[id])
+ {
+ if (NULL == GST_slave_list[id])
+ continue;
+ while (NULL != (hr_entry = GST_slave_list[id]->hr_dll_head))
{
- while (NULL != (hr_entry = GST_slave_list[id]->hr_dll_head))
- {
- GNUNET_CONTAINER_DLL_remove (GST_slave_list[id]->hr_dll_head,
- GST_slave_list[id]->hr_dll_tail, hr_entry);
- GNUNET_free (hr_entry);
- }
- if (NULL != GST_slave_list[id]->rhandle)
- GNUNET_TESTBED_cancel_registration (GST_slave_list[id]->rhandle);
- (void)
- GNUNET_CONTAINER_multihashmap_iterate (GST_slave_list
- [id]->reghost_map,
- reghost_free_iterator,
- GST_slave_list[id]);
- GNUNET_CONTAINER_multihashmap_destroy (GST_slave_list[id]->reghost_map);
- if (NULL != GST_slave_list[id]->controller)
- GNUNET_TESTBED_controller_disconnect (GST_slave_list[id]->controller);
- if (NULL != GST_slave_list[id]->controller_proc)
- GNUNET_TESTBED_controller_stop (GST_slave_list[id]->controller_proc);
- GNUNET_free (GST_slave_list[id]);
+ GNUNET_CONTAINER_DLL_remove (GST_slave_list[id]->hr_dll_head,
+ GST_slave_list[id]->hr_dll_tail, hr_entry);
+ GNUNET_free (hr_entry);
+ }
+ if (NULL != GST_slave_list[id]->rhandle)
+ GNUNET_TESTBED_cancel_registration (GST_slave_list[id]->rhandle);
+ (void)
+ GNUNET_CONTAINER_multihashmap_iterate (GST_slave_list
+ [id]->reghost_map,
+ reghost_free_iterator,
+ GST_slave_list[id]);
+ GNUNET_CONTAINER_multihashmap_destroy (GST_slave_list[id]->reghost_map);
+ if (NULL != GST_slave_list[id]->controller)
+ GNUNET_TESTBED_controller_disconnect (GST_slave_list[id]->controller);
+ if (NULL != (cproc = GST_slave_list[id]->controller_proc))
+ {
+ LOG_DEBUG ("Stopping a slave\n");
+ GNUNET_TESTBED_controller_kill_ (cproc);
}
+ }
+ for (id = 0; id < GST_slave_list_size; id++)
+ {
+ if (NULL == GST_slave_list[id])
+ continue;
+ if (NULL != (cproc = GST_slave_list[id]->controller_proc))
+ {
+ GNUNET_TESTBED_controller_destroy_ (cproc);
+ LOG_DEBUG ("Slave stopped\n");
+ }
+ GNUNET_free (GST_slave_list[id]);
+ }
GNUNET_free_non_null (GST_slave_list);
GST_slave_list = NULL;
}
* @param event information about the event
*/
static void
-slave_event_callback (void *cls,
- const struct GNUNET_TESTBED_EventInformation *event)
+slave_event_cb (void *cls, const struct GNUNET_TESTBED_EventInformation *event)
{
struct LCFContext *lcf;
LCFContexts */
GNUNET_assert (GNUNET_TESTBED_ET_OPERATION_FINISHED == event->type);
lcf = event->op_cls;
- if (CLOSURE_TYPE_LCF == lcf->type)
- {
- GNUNET_assert (lcf->op == event->op);
- GNUNET_assert (FINISHED == lcf->state);
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != lcf->timeout_task);
- GNUNET_SCHEDULER_cancel (lcf->timeout_task);
- if (NULL == event->details.operation_finished.emsg)
- send_controller_link_response (lcf->client, lcf->operation_id,
- GNUNET_TESTBED_host_get_cfg_
- (GST_host_list[lcf->delegated_host_id]),
- NULL);
- else
- send_controller_link_response (lcf->client, lcf->operation_id,
- NULL,
- event->details.operation_finished.emsg);
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == lcf_proc_task_id);
- lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf);
- return;
- }
- GNUNET_assert (0);
+ GNUNET_assert (lcf->op == event->op);
+ GNUNET_assert (FINISHED == lcf->state);
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != lcf->timeout_task);
+ GNUNET_SCHEDULER_cancel (lcf->timeout_task);
+ if (NULL == event->details.operation_finished.emsg)
+ send_controller_link_response (lcf->client, lcf->operation_id,
+ GNUNET_TESTBED_host_get_cfg_
+ (GST_host_list[lcf->delegated_host_id]),
+ NULL);
+ else
+ send_controller_link_response (lcf->client, lcf->operation_id,
+ NULL,
+ event->details.operation_finished.emsg);
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK == lcf_proc_task_id);
+ lcf_proc_task_id = GNUNET_SCHEDULER_add_now (&lcf_proc_task, lcf);
+ return;
}
-static void
-slave_status_callback (void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg,
- int status);
/**
* Callback to signal successfull startup of the controller process
* GNUNET_TESTBED_controller_stop() shouldn't be called in this case
*/
static void
-slave_status_callback (void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg,
- int status)
+slave_status_cb (void *cls, const struct GNUNET_CONFIGURATION_Handle *cfg,
+ int status)
{
struct Slave *slave = cls;
struct LinkControllersContext *lcc;
}
slave->controller =
GNUNET_TESTBED_controller_connect (GST_host_list[slave->host_id],
- EVENT_MASK, &slave_event_callback,
+ EVENT_MASK, &slave_event_cb,
slave);
if (NULL != slave->controller)
{
slave->lcc = NULL;
}
+
+/**
+ * Trigger notification task if there are notification requests currently
+ * waiting in the given neighbour. Also activates the neighbour connect operation
+ * if it was previously inactivated so that the connection to the neighbour can
+ * be re-used
+ *
+ * @param n the neighbour
+ */
+static void
+trigger_notifications (struct Neighbour *n);
+
+
+/**
+ * Task to call the notification queued in the notifications list of the given
+ * neighbour
+ *
+ * @param cls the neighbour
+ * @param tc scheduler task context
+ */
static void
neighbour_connect_notify_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc);
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct Neighbour *n = cls;
+ struct NeighbourConnectNotification *h;
+ GNUNET_assert (NULL != (h = n->nl_head));
+ GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != n->notify_task);
+ n->notify_task = GNUNET_SCHEDULER_NO_TASK;
+ GNUNET_assert (NULL != n->controller);
+ GNUNET_CONTAINER_DLL_remove (n->nl_head, n->nl_tail, h);
+ trigger_notifications (n);
+ h->cb (h->cb_cls, n->controller);
+ GNUNET_free (h);
+}
+
+
+/**
+ * Trigger notification task if there are notification requests currently
+ * waiting in the given neighbour. Also activates the neighbour connect operation
+ * if it was previously inactivated so that the connection to the neighbour can
+ * be re-used
+ *
+ * @param n the neighbour
+ */
static void
trigger_notifications (struct Neighbour *n)
{
GNUNET_SCHEDULER_add_now (&neighbour_connect_notify_task, n);
}
-static void
-neighbour_connect_notify_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct Neighbour *n = cls;
- struct NeighbourConnectNotification *h;
-
- GNUNET_assert (NULL != (h = n->nl_head));
- GNUNET_assert (GNUNET_SCHEDULER_NO_TASK != n->notify_task);
- n->notify_task = GNUNET_SCHEDULER_NO_TASK;
- GNUNET_assert (NULL != n->controller);
- GNUNET_CONTAINER_DLL_remove (n->nl_head, n->nl_tail, h);
- trigger_notifications (n);
- h->cb (h->cb_cls, n->controller);
- GNUNET_free (h);
-}
+/**
+ * Callback to be called when the neighbour connect operation is started. The
+ * connection to the neigbour is opened here and any pending notifications are
+ * trigger.
+ *
+ * @param cls the neighbour
+ */
static void
opstart_neighbour_conn (void *cls)
{
LOG_DEBUG ("Opening connection to controller on host %u\n", n->host_id);
n->controller = GNUNET_TESTBED_controller_connect (GST_host_list[n->host_id],
EVENT_MASK,
- &slave_event_callback,
+ &slave_event_cb,
NULL);
trigger_notifications (n);
}
+
+/**
+ * Callback to be called when the neighbour connect operation is released
+ *
+ * @param cls the neighbour
+ */
static void
oprelease_neighbour_conn (void *cls)
{
n->inactive = 0;
}
+
+/**
+ * Try to open a connection to the given neigbour. If the connection is open
+ * already, then it is re-used. If not, the request is queued in the operation
+ * queues responsible for bounding the total number of file descriptors. The
+ * actual connection will happen when the operation queue marks the
+ * corresponding operation as active.
+ *
+ * @param n the neighbour to open a connection to
+ * @param cb the notification callback to call when the connection is opened
+ * @param cb_cls the closure for the above callback
+ */
struct NeighbourConnectNotification *
GST_neighbour_get_connection (struct Neighbour *n,
GST_NeigbourConnectNotifyCallback cb,
return h;
}
+
+/**
+ * Cancel the request for opening a connection to the neighbour
+ *
+ * @param h the notification handle
+ */
void
GST_neighbour_get_connection_cancel (struct NeighbourConnectNotification *h)
{
trigger_notifications (n);
}
+
+/**
+ * Release the connection to the neighbour. The actual connection will be
+ * closed if connections to other neighbour are waiting (to maintain a bound on
+ * the total number of connections that are open).
+ *
+ * @param n the neighbour whose connection can be closed
+ */
void
GST_neighbour_release_connection (struct Neighbour *n)
{
}
}
+
+/**
+ * Cleanup neighbour connect contexts
+ *
+ * @param ncc the neighbour connect context to cleanup
+ */
static void
cleanup_ncc (struct NeighbourConnectCtxt *ncc)
{
GNUNET_free (ncc);
}
+
+/**
+ * Cleans up the neighbour list
+ */
void
GST_neighbour_list_clean()
{
GNUNET_free_non_null (neighbour_list);
}
+
+/**
+ * Get a neighbour from the neighbour list
+ *
+ * @param id the index of the neighbour in the neighbour list
+ * @return the Neighbour; NULL if the given index in invalid (index greater than
+ * the list size or neighbour at that index is NULL)
+ */
struct Neighbour *
GST_get_neighbour (uint32_t id)
{
return neighbour_list[id];
}
+
+/**
+ * Function to cleanup the neighbour connect contexts
+ */
void
GST_free_nccq ()
{
cleanup_ncc (ncc_head);
}
+
+/**
+ * Task to be run upon timeout while attempting to connect to the neighbour
+ *
+ * @param cls the NeighbourConnectCtxt created in GST_handle_link_controllers()
+ * @param tc the scheduler task context
+ */
static void
timeout_neighbour_connect (void *cls,
const struct GNUNET_SCHEDULER_TaskContext *tc)
cleanup_ncc (ncc);
}
+
+/**
+ * Callback called when a connection to the neighbour is made
+ *
+ * @param cls the NeighbourConnectCtxt created in GST_handle_link_controllers()
+ * @param c the handle the neighbour's controller
+ */
static void
neighbour_connect_cb (void *cls, struct GNUNET_TESTBED_Controller *c)
{
cleanup_ncc (ncc);
}
+
+/**
+ * Function to create a neigbour and add it into the neighbour list
+ *
+ * @param host the host of the neighbour
+ */
struct Neighbour *
GST_create_neighbour (struct GNUNET_TESTBED_Host *host)
{
slave->controller_proc =
GNUNET_TESTBED_controller_start (GST_context->master_ip,
GST_host_list[slave->host_id],
- &slave_status_callback, slave);
+ &slave_status_cb, slave);
new_route = GNUNET_malloc (sizeof (struct Route));
new_route->dest = delegated_host_id;
new_route->thru = GST_context->host_id;
}
lcfq = GNUNET_malloc (sizeof (struct LCFContextQueue));
lcfq->lcf = GNUNET_malloc (sizeof (struct LCFContext));
- lcfq->lcf->type = CLOSURE_TYPE_LCF;
lcfq->lcf->delegated_host_id = delegated_host_id;
lcfq->lcf->slave_host_id = slave_host_id;
route = GST_find_dest_route (slave_host_id);
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