/*
This file is part of GNUnet.
- Copyright (C) 2009-2013, 2016 GNUnet e.V.
+ Copyright (C) 2009-2013, 2016, 2018 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
-
+
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
#include "gnunet_transport_core_service.h"
#include "transport.h"
-#define LOG(kind,...) GNUNET_log_from (kind, "transport-api-core",__VA_ARGS__)
+#define LOG(kind, ...) GNUNET_log_from (kind, "transport-api-core", __VA_ARGS__)
/**
- * If we could not send any payload to a peer for this amount of
- * time, we print a warning.
+ * How large to start with for the hashmap of neighbours.
*/
-#define UNREADY_WARN_TIME GNUNET_TIME_UNIT_MINUTES
+#define STARTING_NEIGHBOURS_SIZE 16
/**
- * How large to start with for the hashmap of neighbours.
+ * Window size. How many messages to the same target do we pass
+ * to TRANSPORT without a SEND_OK in between? Small values limit
+ * thoughput, large values will increase latency.
+ *
+ * FIXME-OPTIMIZE: find out what good values are experimentally,
+ * maybe set adaptively (i.e. to observed available bandwidth).
*/
-#define STARTING_NEIGHBOURS_SIZE 16
+#define SEND_WINDOW_SIZE 4
/**
*/
struct Neighbour
{
+
+ /**
+ * Identity of this neighbour.
+ */
+ struct GNUNET_PeerIdentity id;
+
/**
* Overall transport handle.
*/
void *handlers_cls;
/**
- * Identity of this neighbour.
- */
- struct GNUNET_PeerIdentity id;
-
- /**
- * Outbound bandwidh tracker.
+ * How many messages can we still send to this peer before we should
+ * throttle?
*/
- struct GNUNET_BANDWIDTH_Tracker out_tracker;
+ unsigned int ready_window;
/**
- * 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 @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).
+ * Used to indicate our status if @e env is non-NULL. Set to
+ * #GNUNET_YES if we did pass a message to the MQ and are waiting
+ * for the call to #notify_send_done(). Set to #GNUNET_NO if the @e
+ * ready_window is 0 and @e env is waiting for a
+ * #GNUNET_MESSAGE_TYPE_TRANSPORT_RECV_OK?
*/
- struct GNUNET_CONTAINER_HeapNode *hn;
-
- /**
- * Task to trigger MQ when we have enough bandwidth for the
- * next transmission.
- */
- struct GNUNET_SCHEDULER_Task *timeout_task;
-
- /**
- * Sending consumed more bytes on wire than payload was announced
- * This overhead is added to the delay of next sending operation
- */
- unsigned long long traffic_overhead;
-
- /**
- * Is this peer currently ready to receive a message?
- */
- int is_ready;
+ int16_t awaiting_done;
/**
* Size of the message in @e env.
*/
uint16_t env_size;
-
};
-
/**
* Handle for the transport service (includes all of the
* state for the transport service).
/**
* function to call on connect events
*/
- GNUNET_TRANSPORT_NotifyConnecT nc_cb;
+ GNUNET_TRANSPORT_NotifyConnect nc_cb;
/**
* function to call on disconnect events
*/
- GNUNET_TRANSPORT_NotifyDisconnecT nd_cb;
-
- /**
- * function to call on excess bandwidth events
- */
- GNUNET_TRANSPORT_NotifyExcessBandwidtH neb_cb;
+ GNUNET_TRANSPORT_NotifyDisconnect nd_cb;
/**
* My client connection to the transport service.
* (if #GNUNET_NO, then @e self is all zeros!).
*/
int check_self;
-
};
neighbour_find (struct GNUNET_TRANSPORT_CoreHandle *h,
const struct GNUNET_PeerIdentity *peer)
{
- return GNUNET_CONTAINER_multipeermap_get (h->neighbours,
- peer);
-}
-
-
-/**
- * Function called by the bandwidth tracker if we have excess
- * bandwidth.
- *
- * @param cls the `struct Neighbour` that has excess bandwidth
- */
-static void
-notify_excess_cb (void *cls)
-{
- struct Neighbour *n = cls;
- struct GNUNET_TRANSPORT_CoreHandle *h = n->h;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Notifying CORE that more bandwidth is available for %s\n",
- GNUNET_i2s (&n->id));
-
- if (NULL != h->neb_cb)
- h->neb_cb (h->cls,
- &n->id,
- n->handlers_cls);
+ return GNUNET_CONTAINER_multipeermap_get (h->neighbours, peer);
}
* #GNUNET_NO if not.
*/
static int
-neighbour_delete (void *cls,
- const struct GNUNET_PeerIdentity *key,
- void *value)
+neighbour_delete (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
{
struct GNUNET_TRANSPORT_CoreHandle *handle = cls;
struct Neighbour *n = value;
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Dropping entry for neighbour `%s'.\n",
GNUNET_i2s (key));
- GNUNET_BANDWIDTH_tracker_notification_stop (&n->out_tracker);
if (NULL != handle->nd_cb)
- handle->nd_cb (handle->cls,
- &n->id,
- n->handlers_cls);
- if (NULL != n->timeout_task)
- {
- GNUNET_SCHEDULER_cancel (n->timeout_task);
- n->timeout_task = NULL;
- }
+ handle->nd_cb (handle->cls, &n->id, n->handlers_cls);
if (NULL != n->env)
{
GNUNET_MQ_send_cancel (n->env);
}
GNUNET_MQ_destroy (n->mq);
GNUNET_assert (NULL == n->mq);
- GNUNET_assert (GNUNET_YES ==
- GNUNET_CONTAINER_multipeermap_remove (handle->neighbours,
- key,
- n));
+ GNUNET_assert (
+ GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_remove (handle->neighbours, key, n));
GNUNET_free (n);
return GNUNET_YES;
}
* @param error error code
*/
static void
-mq_error_handler (void *cls,
- enum GNUNET_MQ_Error error)
+mq_error_handler (void *cls, enum GNUNET_MQ_Error error)
{
struct GNUNET_TRANSPORT_CoreHandle *h = cls;
}
-/**
- * Function we use for checking incoming HELLO messages.
- *
- * @param cls closure, a `struct GNUNET_TRANSPORT_CoreHandle *`
- * @param msg message received
- * @return #GNUNET_OK if message is well-formed
- */
-static int
-check_hello (void *cls,
- const struct GNUNET_MessageHeader *msg)
-{
- struct GNUNET_PeerIdentity me;
-
- if (GNUNET_OK !=
- GNUNET_HELLO_get_id ((const struct GNUNET_HELLO_Message *) msg,
- &me))
- {
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
- return GNUNET_OK;
-}
-
-
-/**
- * Function we use for handling incoming HELLO messages.
- *
- * @param cls closure, a `struct GNUNET_TRANSPORT_CoreHandle *`
- * @param msg message received
- */
-static void
-handle_hello (void *cls,
- const struct GNUNET_MessageHeader *msg)
-{
- /* we do not care => FIXME: signal in options to NEVER send HELLOs! */
-}
-
-
/**
* A message from the handler's message queue to a neighbour was
* transmitted. Now trigger (possibly delayed) notification of the
* neighbour's message queue that we are done and thus ready for
- * the next message.
+ * the next message. Note that the MQ being ready is independent
+ * of the send window, as we may queue many messages and simply
+ * not pass them to TRANSPORT if the send window is insufficient.
*
* @param cls the `struct Neighbour` where the message was sent
*/
static void
-notify_send_done_fin (void *cls)
+notify_send_done (void *cls)
{
struct Neighbour *n = cls;
- n->timeout_task = NULL;
- n->is_ready = GNUNET_YES;
+ n->awaiting_done = GNUNET_NO;
+ n->env = NULL;
GNUNET_MQ_impl_send_continue (n->mq);
}
/**
- * A message from the handler's message queue to a neighbour was
- * transmitted. Now trigger (possibly delayed) notification of the
- * neighbour's message queue that we are done and thus ready for
- * the next message.
+ * We have an envelope waiting for transmission at @a n, and
+ * our transmission window is positive. Perform the transmission.
*
- * @param cls the `struct Neighbour` where the message was sent
+ * @param n neighbour to perform transmission for
*/
static void
-notify_send_done (void *cls)
+do_send (struct Neighbour *n)
{
- struct Neighbour *n = cls;
- struct GNUNET_TIME_Relative delay;
-
- n->timeout_task = NULL;
- if (NULL != n->env)
- {
- GNUNET_BANDWIDTH_tracker_consume (&n->out_tracker,
- n->env_size + n->traffic_overhead);
- n->env = NULL;
- n->traffic_overhead = 0;
- }
- delay = GNUNET_BANDWIDTH_tracker_get_delay (&n->out_tracker,
- 128);
- if (0 == delay.rel_value_us)
- {
- n->is_ready = GNUNET_YES;
- GNUNET_MQ_impl_send_continue (n->mq);
- return;
- }
- GNUNET_MQ_impl_send_in_flight (n->mq);
- /* cannot send even a small message without violating
- quota, wait a before allowing MQ to send next message */
- n->timeout_task = GNUNET_SCHEDULER_add_delayed (delay,
- ¬ify_send_done_fin,
- n);
+ GNUNET_assert (0 < n->ready_window);
+ GNUNET_assert (NULL != n->env);
+ n->ready_window--;
+ n->awaiting_done = GNUNET_YES;
+ GNUNET_MQ_notify_sent (n->env, ¬ify_send_done, n);
+ GNUNET_MQ_send (n->h->mq, n->env);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Passed message of type %u for neighbour `%s' to TRANSPORT.\n",
+ ntohs (GNUNET_MQ_env_get_msg (n->env)->type),
+ GNUNET_i2s (&n->id));
}
void *impl_state)
{
struct Neighbour *n = impl_state;
- struct GNUNET_TRANSPORT_CoreHandle *h = n->h;
struct OutboundMessage *obm;
uint16_t msize;
- GNUNET_assert (GNUNET_YES == n->is_ready);
msize = ntohs (msg->size);
if (msize >= GNUNET_MAX_MESSAGE_SIZE - sizeof (*obm))
{
GNUNET_MQ_impl_send_continue (mq);
return;
}
- GNUNET_assert (NULL == n->env);
- n->env = GNUNET_MQ_msg_nested_mh (obm,
- GNUNET_MESSAGE_TYPE_TRANSPORT_SEND,
- msg);
- obm->reserved = htonl (0);
- obm->timeout = GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_MINUTES); /* FIXME: to be removed */
- obm->peer = n->id;
- GNUNET_assert (NULL == n->timeout_task);
- n->is_ready = GNUNET_NO;
- n->env_size = ntohs (msg->size);
- GNUNET_MQ_notify_sent (n->env,
- ¬ify_send_done,
- n);
- GNUNET_MQ_send (h->mq,
- n->env);
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Queued message of type %u for neighbour `%s'.\n",
+ "CORE requested transmission of message of type %u to neighbour `%s'.\n",
ntohs (msg->type),
GNUNET_i2s (&n->id));
+
+ GNUNET_assert (NULL == n->env);
+ n->env =
+ GNUNET_MQ_msg_nested_mh (obm, GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, msg);
+ n->env_size = ntohs (msg->size);
+ {
+ struct GNUNET_MQ_Envelope *env;
+
+ env = GNUNET_MQ_get_current_envelope (mq);
+ obm->priority = htonl ((uint32_t) GNUNET_MQ_env_get_options (env));
+ }
+ obm->peer = n->id;
+ if (0 == n->ready_window)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Flow control delays transmission to CORE until we see SEND_OK.\n");
+ return; /* can't send yet, need to wait for SEND_OK */
+ }
+ do_send (n);
}
* @param impl_state state of the implementation
*/
static void
-mq_destroy_impl (struct GNUNET_MQ_Handle *mq,
- void *impl_state)
+mq_destroy_impl (struct GNUNET_MQ_Handle *mq, void *impl_state)
{
struct Neighbour *n = impl_state;
* @param impl_state state specific to the implementation
*/
static void
-mq_cancel_impl (struct GNUNET_MQ_Handle *mq,
- void *impl_state)
+mq_cancel_impl (struct GNUNET_MQ_Handle *mq, void *impl_state)
{
struct Neighbour *n = impl_state;
- GNUNET_assert (GNUNET_NO == n->is_ready);
- if (NULL != n->env)
+ n->ready_window++;
+ if (GNUNET_YES == n->awaiting_done)
{
GNUNET_MQ_send_cancel (n->env);
n->env = NULL;
+ n->awaiting_done = GNUNET_NO;
+ }
+ else
+ {
+ GNUNET_assert (0 == n->ready_window);
+ n->env = NULL;
}
-
- n->is_ready = GNUNET_YES;
}
* @param error error code
*/
static void
-peer_mq_error_handler (void *cls,
- enum GNUNET_MQ_Error error)
+peer_mq_error_handler (void *cls, enum GNUNET_MQ_Error error)
{
/* struct Neighbour *n = cls; */
}
-/**
- * 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->timeout_task)
- return;
- delay = GNUNET_BANDWIDTH_tracker_get_delay (&n->out_tracker,
- 128);
- GNUNET_SCHEDULER_cancel (n->timeout_task);
- n->timeout_task = GNUNET_SCHEDULER_add_delayed (delay,
- ¬ify_send_done,
- n);
-}
-
-
/**
* Function we use for handling incoming connect messages.
*
* @param cim message received
*/
static void
-handle_connect (void *cls,
- const struct ConnectInfoMessage *cim)
+handle_connect (void *cls, const struct ConnectInfoMessage *cim)
{
struct GNUNET_TRANSPORT_CoreHandle *h = cls;
struct Neighbour *n;
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Receiving CONNECT message for `%s' with quota %u\n",
- GNUNET_i2s (&cim->id),
- ntohl (cim->quota_out.value__));
+ "Receiving CONNECT message for `%s'\n",
+ GNUNET_i2s (&cim->id));
n = neighbour_find (h, &cim->id);
if (NULL != n)
{
n = GNUNET_new (struct Neighbour);
n->id = cim->id;
n->h = h;
- n->is_ready = GNUNET_YES;
- n->traffic_overhead = 0;
- GNUNET_BANDWIDTH_tracker_init2 (&n->out_tracker,
- &outbound_bw_tracker_update,
- n,
- GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
- MAX_BANDWIDTH_CARRY_S,
- ¬ify_excess_cb,
- n);
+ n->ready_window = SEND_WINDOW_SIZE;
GNUNET_assert (GNUNET_OK ==
- GNUNET_CONTAINER_multipeermap_put (h->neighbours,
- &n->id,
- n,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ GNUNET_CONTAINER_multipeermap_put (
+ h->neighbours,
+ &n->id,
+ n,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
- GNUNET_BANDWIDTH_tracker_update_quota (&n->out_tracker,
- cim->quota_out);
n->mq = GNUNET_MQ_queue_for_callbacks (&mq_send_impl,
&mq_destroy_impl,
&mq_cancel_impl,
n);
if (NULL != h->nc_cb)
{
- n->handlers_cls = h->nc_cb (h->cls,
- &n->id,
- n->mq);
- GNUNET_MQ_set_handlers_closure (n->mq,
- n->handlers_cls);
+ n->handlers_cls = h->nc_cb (h->cls, &n->id, n->mq);
+ GNUNET_MQ_set_handlers_closure (n->mq, n->handlers_cls);
}
}
* @param dim message received
*/
static void
-handle_disconnect (void *cls,
- const struct DisconnectInfoMessage *dim)
+handle_disconnect (void *cls, const struct DisconnectInfoMessage *dim)
{
struct GNUNET_TRANSPORT_CoreHandle *h = cls;
struct Neighbour *n;
disconnect_and_schedule_reconnect (h);
return;
}
- GNUNET_assert (GNUNET_YES ==
- neighbour_delete (h,
- &dim->peer,
- n));
+ GNUNET_assert (GNUNET_YES == neighbour_delete (h, &dim->peer, n));
}
* @param okm message received
*/
static void
-handle_send_ok (void *cls,
- const struct SendOkMessage *okm)
+handle_send_ok (void *cls, const struct SendOkMessage *okm)
{
struct GNUNET_TRANSPORT_CoreHandle *h = cls;
struct Neighbour *n;
- uint32_t bytes_msg;
- uint32_t bytes_physical;
- bytes_msg = ntohl (okm->bytes_msg);
- bytes_physical = ntohl (okm->bytes_physical);
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Receiving SEND_OK message, transmission to %s %s.\n",
- GNUNET_i2s (&okm->peer),
- ntohl (okm->success) == GNUNET_OK ? "succeeded" : "failed");
- n = neighbour_find (h,
- &okm->peer);
+ "Receiving SEND_OK message for transmission to %s\n",
+ GNUNET_i2s (&okm->peer));
+ n = neighbour_find (h, &okm->peer);
if (NULL == n)
{
/* We should never get a 'SEND_OK' for a peer that we are not
disconnect_and_schedule_reconnect (h);
return;
}
- if (bytes_physical > bytes_msg)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Overhead for %u byte message was %u\n",
- bytes_msg,
- bytes_physical - bytes_msg);
- n->traffic_overhead += bytes_physical - bytes_msg;
- }
+ n->ready_window++;
+ if ((NULL != n->env) && (1 == n->ready_window))
+ do_send (n);
}
* @param im message received
*/
static int
-check_recv (void *cls,
- const struct InboundMessage *im)
+check_recv (void *cls, const struct InboundMessage *im)
{
const struct GNUNET_MessageHeader *imm;
uint16_t size;
* @param im message received
*/
static void
-handle_recv (void *cls,
- const struct InboundMessage *im)
+handle_recv (void *cls, const struct InboundMessage *im)
{
struct GNUNET_TRANSPORT_CoreHandle *h = cls;
- const struct GNUNET_MessageHeader *imm
- = (const struct GNUNET_MessageHeader *) &im[1];
+ const struct GNUNET_MessageHeader *imm =
+ (const struct GNUNET_MessageHeader *) &im[1];
struct Neighbour *n;
LOG (GNUNET_ERROR_TYPE_DEBUG,
disconnect_and_schedule_reconnect (h);
return;
}
- GNUNET_MQ_inject_message (n->mq,
- imm);
-}
-
-
-/**
- * Function we use for handling incoming set quota messages.
- *
- * @param cls closure, a `struct GNUNET_TRANSPORT_CoreHandle *`
- * @param msg message received
- */
-static void
-handle_set_quota (void *cls,
- const struct QuotaSetMessage *qm)
-{
- struct GNUNET_TRANSPORT_CoreHandle *h = cls;
- struct Neighbour *n;
-
- n = neighbour_find (h,
- &qm->peer);
- if (NULL == n)
- {
- GNUNET_break (0);
- disconnect_and_schedule_reconnect (h);
- return;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Receiving SET_QUOTA message for `%s' with quota %u\n",
- GNUNET_i2s (&qm->peer),
- ntohl (qm->quota.value__));
- GNUNET_BANDWIDTH_tracker_update_quota (&n->out_tracker,
- qm->quota);
+ GNUNET_MQ_inject_message (n->mq, imm);
}
reconnect (void *cls)
{
struct GNUNET_TRANSPORT_CoreHandle *h = cls;
- struct GNUNET_MQ_MessageHandler handlers[] = {
- GNUNET_MQ_hd_var_size (hello,
- GNUNET_MESSAGE_TYPE_HELLO,
- struct GNUNET_MessageHeader,
- h),
- GNUNET_MQ_hd_fixed_size (connect,
- GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT,
- struct ConnectInfoMessage,
- h),
- GNUNET_MQ_hd_fixed_size (disconnect,
- GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT,
- struct DisconnectInfoMessage,
- h),
- GNUNET_MQ_hd_fixed_size (send_ok,
- GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK,
- struct SendOkMessage,
- h),
- GNUNET_MQ_hd_var_size (recv,
- GNUNET_MESSAGE_TYPE_TRANSPORT_RECV,
- struct InboundMessage,
- h),
- GNUNET_MQ_hd_fixed_size (set_quota,
- GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA,
- struct QuotaSetMessage,
- h),
- GNUNET_MQ_handler_end ()
- };
+ struct GNUNET_MQ_MessageHandler handlers[] =
+ {GNUNET_MQ_hd_fixed_size (connect,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT,
+ struct ConnectInfoMessage,
+ h),
+ GNUNET_MQ_hd_fixed_size (disconnect,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT,
+ struct DisconnectInfoMessage,
+ h),
+ GNUNET_MQ_hd_fixed_size (send_ok,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK,
+ struct SendOkMessage,
+ h),
+ GNUNET_MQ_hd_var_size (recv,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_RECV,
+ struct InboundMessage,
+ h),
+ GNUNET_MQ_handler_end ()};
struct GNUNET_MQ_Envelope *env;
struct StartMessage *s;
uint32_t options;
h->reconnect_task = NULL;
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Connecting to transport service.\n");
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Connecting to transport service.\n");
GNUNET_assert (NULL == h->mq);
- h->mq = GNUNET_CLIENT_connect (h->cfg,
- "transport",
- handlers,
- &mq_error_handler,
- h);
+ h->mq =
+ GNUNET_CLIENT_connect (h->cfg, "transport", handlers, &mq_error_handler, h);
if (NULL == h->mq)
return;
- env = GNUNET_MQ_msg (s,
- GNUNET_MESSAGE_TYPE_TRANSPORT_START);
+ env = GNUNET_MQ_msg (s, GNUNET_MESSAGE_TYPE_TRANSPORT_START);
options = 0;
if (h->check_self)
options |= 1;
options |= 2;
s->options = htonl (options);
s->self = h->self;
- GNUNET_MQ_send (h->mq,
- env);
+ GNUNET_MQ_send (h->mq, env);
}
/**
- * Function that will schedule the job that will try
- * to connect us again to the client.
+ * Disconnect from the transport service.
*
* @param h transport service to reconnect
*/
static void
-disconnect_and_schedule_reconnect (struct GNUNET_TRANSPORT_CoreHandle *h)
+disconnect (struct GNUNET_TRANSPORT_CoreHandle *h)
{
- GNUNET_assert (NULL == h->reconnect_task);
- /* Forget about all neighbours that we used to be connected to */
- GNUNET_CONTAINER_multipeermap_iterate (h->neighbours,
- &neighbour_delete,
- h);
+ GNUNET_CONTAINER_multipeermap_iterate (h->neighbours, &neighbour_delete, h);
if (NULL != h->mq)
{
GNUNET_MQ_destroy (h->mq);
h->mq = NULL;
}
+}
+
+
+/**
+ * Function that will schedule the job that will try
+ * to connect us again to the client.
+ *
+ * @param h transport service to reconnect
+ */
+static void
+disconnect_and_schedule_reconnect (struct GNUNET_TRANSPORT_CoreHandle *h)
+{
+ GNUNET_assert (NULL == h->reconnect_task);
+ disconnect (h);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Scheduling task to reconnect to transport service in %s.\n",
- GNUNET_STRINGS_relative_time_to_string (h->reconnect_delay,
- GNUNET_YES));
+ GNUNET_STRINGS_relative_time_to_string (h->reconnect_delay, GNUNET_YES));
h->reconnect_task =
- GNUNET_SCHEDULER_add_delayed (h->reconnect_delay,
- &reconnect,
- h);
+ GNUNET_SCHEDULER_add_delayed (h->reconnect_delay, &reconnect, h);
h->reconnect_delay = GNUNET_TIME_STD_BACKOFF (h->reconnect_delay);
}
{
struct Neighbour *n;
- n = neighbour_find (handle,
- peer);
+ n = neighbour_find (handle, peer);
if (NULL == n)
return NULL;
return n->mq;
}
+/**
+ * Notification from the CORE service to the TRANSPORT service
+ * that the CORE service has finished processing a message from
+ * TRANSPORT (via the @code{handlers} of #GNUNET_TRANSPORT_core_connect())
+ * and that it is thus now OK for TRANSPORT to send more messages
+ * for @a pid.
+ *
+ * Used to provide flow control, this is our equivalent to
+ * #GNUNET_SERVICE_client_continue() of an ordinary service.
+ *
+ * Note that due to the use of a window, TRANSPORT may send multiple
+ * messages destined for the same peer even without an intermediate
+ * call to this function. However, CORE must still call this function
+ * once per message received, as otherwise eventually the window will
+ * be full and TRANSPORT will stop providing messages to CORE for @a
+ * pid.
+ *
+ * @param ch core handle
+ * @param pid which peer was the message from that was fully processed by CORE
+ */
+void
+GNUNET_TRANSPORT_core_receive_continue (struct GNUNET_TRANSPORT_CoreHandle *ch,
+ const struct GNUNET_PeerIdentity *pid)
+{
+ struct GNUNET_MQ_Envelope *env;
+ struct RecvOkMessage *rok;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Message for %s finished CORE processing, sending RECV_OK.\n",
+ GNUNET_i2s (pid));
+ if (NULL == ch->mq)
+ return;
+ env = GNUNET_MQ_msg (rok, GNUNET_MESSAGE_TYPE_TRANSPORT_RECV_OK);
+ rok->increase_window_delta = htonl (1);
+ rok->peer = *pid;
+ GNUNET_MQ_send (ch->mq, env);
+}
+
+
/**
* Connect to the transport service. Note that the connection may
* complete (or fail) asynchronously.
* @param rec receive function to call
* @param nc function to call on connect events
* @param nd function to call on disconnect events
- * @param neb function to call if we have excess bandwidth to a peer
* @return NULL on error
*/
struct GNUNET_TRANSPORT_CoreHandle *
GNUNET_TRANSPORT_core_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
- const struct GNUNET_PeerIdentity *self,
- const struct GNUNET_MQ_MessageHandler *handlers,
- void *cls,
- GNUNET_TRANSPORT_NotifyConnecT nc,
- GNUNET_TRANSPORT_NotifyDisconnecT nd,
- GNUNET_TRANSPORT_NotifyExcessBandwidtH neb)
+ const struct GNUNET_PeerIdentity *self,
+ const struct GNUNET_MQ_MessageHandler *handlers,
+ void *cls,
+ GNUNET_TRANSPORT_NotifyConnect nc,
+ GNUNET_TRANSPORT_NotifyDisconnect nd)
{
struct GNUNET_TRANSPORT_CoreHandle *h;
unsigned int i;
h->cls = cls;
h->nc_cb = nc;
h->nd_cb = nd;
- h->neb_cb = neb;
h->reconnect_delay = GNUNET_TIME_UNIT_ZERO;
if (NULL != handlers)
{
- for (i=0;NULL != handlers[i].cb; i++) ;
- h->handlers = GNUNET_new_array (i + 1,
- struct GNUNET_MQ_MessageHandler);
+ for (i = 0; NULL != handlers[i].cb; i++)
+ ;
+ h->handlers = GNUNET_new_array (i + 1, struct GNUNET_MQ_MessageHandler);
GNUNET_memcpy (h->handlers,
- handlers,
- i * sizeof (struct GNUNET_MQ_MessageHandler));
+ handlers,
+ i * sizeof (struct GNUNET_MQ_MessageHandler));
}
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Connecting to transport service\n");
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Connecting to transport service\n");
reconnect (h);
if (NULL == h->mq)
{
return NULL;
}
h->neighbours =
- GNUNET_CONTAINER_multipeermap_create (STARTING_NEIGHBOURS_SIZE,
- GNUNET_YES);
+ GNUNET_CONTAINER_multipeermap_create (STARTING_NEIGHBOURS_SIZE, GNUNET_YES);
return h;
}
/**
* Disconnect from the transport service.
*
- * @param handle handle to the service as returned from #GNUNET_TRANSPORT_core_connect()
+ * @param handle handle to the service as returned from
+ * #GNUNET_TRANSPORT_core_connect()
*/
void
GNUNET_TRANSPORT_core_disconnect (struct GNUNET_TRANSPORT_CoreHandle *handle)
{
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Transport disconnect called!\n");
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Transport disconnect called!\n");
/* this disconnects all neighbours... */
- if (NULL == handle->reconnect_task)
- disconnect_and_schedule_reconnect (handle);
+ disconnect (handle);
/* and now we stop trying to connect again... */
if (NULL != handle->reconnect_task)
{
projects / oweals / gnunet.git / blobdiff