/*
This file is part of GNUnet.
- (C) 2009 Christian Grothoff (and other contributing authors)
+ (C) 2009, 2010 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
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
* @file transport/transport_api.c
* @brief library to access the low-level P2P IO service
* @author Christian Grothoff
- *
- * TODO:
- * - set_quota with low bandwidth should cause peer
- * disconnects (currently never does that) (MINOR)
*/
#include "platform.h"
+#include "gnunet_bandwidth_lib.h"
#include "gnunet_client_lib.h"
+#include "gnunet_constants.h"
+#include "gnunet_container_lib.h"
#include "gnunet_arm_service.h"
#include "gnunet_hello_lib.h"
#include "gnunet_protocols.h"
*/
#define OFFER_HELLO_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30)
+/**
+ * After how long do we automatically retry an unsuccessful
+ * CONNECT request?
+ */
+#define CONNECT_RETRY_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, 750)
+
/**
* How long should ARM wait when starting up the
* transport service before reporting back?
*/
#define STOP_SERVICE_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
+
/**
- * Entry in linked list of all of our current neighbours.
+ * What stage are we in for transmission processing?
*/
-struct NeighbourList
-{
+enum TransmitStage
+ {
+ /**
+ * No active message.
+ */
+ TS_NEW = 0,
+
+ /**
+ * Message in local queue, not given to service.
+ */
+ TS_QUEUED = 1,
+
+ /**
+ * Message given to service, not confirmed (no SEND_OK).
+ */
+ TS_TRANSMITTED = 2,
+
+ /**
+ * One message was given to service and before it was confirmed,
+ * another one was already queued (waiting for SEND_OK to pass on
+ * to service).
+ */
+ TS_TRANSMITTED_QUEUED = 3
+ };
- /**
- * This is a linked list.
- */
- struct NeighbourList *next;
+
+/**
+ * Handle for a transmission-ready request.
+ */
+struct GNUNET_TRANSPORT_TransmitHandle
+{
/**
- * Active transmit handle, can be NULL. Used to move
- * from ready to wait list on disconnect and to block
- * two transmissions to the same peer from being scheduled
- * at the same time.
+ * Neighbour for this handle, NULL for control-traffic.
*/
- struct GNUNET_TRANSPORT_TransmitHandle *transmit_handle;
-
+ struct NeighbourList *neighbour;
/**
- * Identity of this neighbour.
+ * Function to call when notify_size bytes are available
+ * for transmission.
*/
- struct GNUNET_PeerIdentity id;
+ GNUNET_CONNECTION_TransmitReadyNotify notify;
/**
- * At what time did we reset last_sent last?
+ * Closure for notify.
*/
- struct GNUNET_TIME_Absolute last_quota_update;
+ void *notify_cls;
/**
- * How many bytes have we sent since the "last_quota_update"
- * timestamp?
+ * transmit_ready task Id. The task is used to introduce the
+ * artificial delay that may be required to maintain the bandwidth
+ * limits. Later, this will be the ID of the "transmit_timeout"
+ * task which is used to signal a timeout if the transmission could
+ * not be done in a timely fashion.
*/
- uint64_t last_sent;
+ GNUNET_SCHEDULER_TaskIdentifier notify_delay_task;
/**
- * Global quota for outbound traffic to the neighbour in bytes/ms.
+ * Timeout for this request.
*/
- uint32_t quota_out;
+ struct GNUNET_TIME_Absolute timeout;
/**
- * Set to GNUNET_YES if we are currently allowed to
- * transmit a message to the transport service for this
- * peer, GNUNET_NO otherwise.
+ * How many bytes is our notify callback waiting for?
*/
- int transmit_ok;
+ size_t notify_size;
/**
- * Set to GNUNET_YES if we have received an ACK for the
- * given peer. Peers that receive our HELLO always respond
- * with an ACK to let us know that we are successfully
- * communicating. Note that a PING can not be used for this
- * since PINGs are only send if a HELLO address requires
- * confirmation (and also, PINGs are not passed to the
- * transport API itself).
+ * How important is this message?
*/
- int received_ack;
+ unsigned int priority;
};
/**
- * Linked list of requests from clients for our HELLO
- * that were deferred.
+ * Handle for a control message queue entry.
*/
-struct HelloWaitList
+struct ControlMessage
{
/**
- * This is a linked list.
+ * This is a doubly-linked list.
*/
- struct HelloWaitList *next;
+ struct ControlMessage *next;
/**
- * Reference back to our transport handle.
+ * This is a doubly-linked list.
*/
- struct GNUNET_TRANSPORT_Handle *handle;
+ struct ControlMessage *prev;
/**
- * Callback to call once we got our HELLO.
+ * Overall transport handle.
*/
- GNUNET_TRANSPORT_ReceiveCallback rec;
+ struct GNUNET_TRANSPORT_Handle *h;
/**
- * Closure for rec.
+ * Function to call when notify_size bytes are available
+ * for transmission.
*/
- void *rec_cls;
+ GNUNET_CONNECTION_TransmitReadyNotify notify;
/**
- * When to time out (call rec with NULL).
+ * Closure for notify.
*/
- struct GNUNET_TIME_Absolute timeout;
+ void *notify_cls;
/**
- * Timeout task (used to trigger timeout,
- * cancel if we get the HELLO in time).
+ * transmit_ready task Id. The task is used to introduce the
+ * artificial delay that may be required to maintain the bandwidth
+ * limits. Later, this will be the ID of the "transmit_timeout"
+ * task which is used to signal a timeout if the transmission could
+ * not be done in a timely fashion.
*/
- GNUNET_SCHEDULER_TaskIdentifier task;
+ GNUNET_SCHEDULER_TaskIdentifier notify_delay_task;
+ /**
+ * How many bytes is our notify callback waiting for?
+ */
+ size_t notify_size;
};
/**
- * Opaque handle for a transmission-ready request.
+ * Entry in linked list of all of our current neighbours.
*/
-struct GNUNET_TRANSPORT_TransmitHandle
+struct NeighbourList
{
/**
- * We keep the transmit handles that are waiting for
- * a transport-level connection in a doubly linked list.
+ * This is a linked list.
*/
- struct GNUNET_TRANSPORT_TransmitHandle *next;
+ struct NeighbourList *next;
/**
- * We keep the transmit handles that are waiting for
- * a transport-level connection in a doubly linked list.
+ * Overall transport handle.
*/
- struct GNUNET_TRANSPORT_TransmitHandle *prev;
+ struct GNUNET_TRANSPORT_Handle *h;
/**
- * Handle of the main transport data structure.
+ * Active transmit handle; available if 'transmit_forbidden'
+ * is GNUNET_NO.
*/
- struct GNUNET_TRANSPORT_Handle *handle;
+ struct GNUNET_TRANSPORT_TransmitHandle transmit_handle;
/**
- * Neighbour for this handle, can be NULL if the service
- * is not yet connected to the target.
+ * Identity of this neighbour.
*/
- struct NeighbourList *neighbour;
+ struct GNUNET_PeerIdentity id;
/**
- * Which peer is this transmission going to be for? All
- * zeros if it is control-traffic to the service.
+ * Outbound bandwidh tracker.
*/
- struct GNUNET_PeerIdentity target;
+ struct GNUNET_BANDWIDTH_Tracker out_tracker;
/**
- * Function to call when notify_size bytes are available
- * for transmission.
+ * Set to GNUNET_NO if we are currently allowed to accept a
+ * message to the transport service for this peer, GNUNET_YES
+ * if we have one and are waiting for transmission, GNUNET_SYSERR
+ * if we are waiting for confirmation AND have already accepted
+ * yet another message.
*/
- GNUNET_NETWORK_TransmitReadyNotify notify;
+ enum TransmitStage transmit_stage;
/**
- * Closure for notify.
+ * Have we received a notification that this peer is connected
+ * to us right now?
*/
- void *notify_cls;
+ int is_connected;
+
+};
+
+
+/**
+ * Linked list of requests from clients for our HELLO that were
+ * deferred.
+ */
+struct HelloWaitList
+{
/**
- * transmit_ready task Id. The task is used to introduce the
- * artificial delay that may be required to maintain the bandwidth
- * limits. Later, this will be the ID of the "transmit_timeout"
- * task which is used to signal a timeout if the transmission could
- * not be done in a timely fashion.
+ * This is a linked list.
*/
- GNUNET_SCHEDULER_TaskIdentifier notify_delay_task;
+ struct HelloWaitList *next;
/**
- * Timeout for this request.
+ * Reference back to our transport handle.
*/
- struct GNUNET_TIME_Absolute timeout;
+ struct GNUNET_TRANSPORT_Handle *handle;
/**
- * How many bytes is our notify callback waiting for?
+ * Callback to call once we got our HELLO.
*/
- size_t notify_size;
+ GNUNET_TRANSPORT_HelloUpdateCallback rec;
+
+ /**
+ * Closure for rec.
+ */
+ void *rec_cls;
};
GNUNET_TRANSPORT_NotifyDisconnect nd_cb;
/**
- * The current HELLO message for this peer. Updated
- * whenever transports change their addresses.
+ * Head of DLL of control messages.
*/
- struct GNUNET_HELLO_Message *my_hello;
+ struct ControlMessage *control_head;
/**
- * My client connection to the transport service.
+ * Tail of DLL of control messages.
*/
- struct GNUNET_CLIENT_Connection *client;
+ struct ControlMessage *control_tail;
/**
- * Handle to our registration with the client for notification.
+ * The current HELLO message for this peer. Updated
+ * whenever transports change their addresses.
*/
- struct GNUNET_NETWORK_TransmitHandle *network_handle;
+ struct GNUNET_HELLO_Message *my_hello;
/**
- * Linked list of transmit handles that are waiting for the
- * transport to connect to the respective peer. When we
- * receive notification that the transport connected to a
- * peer, we go over this list and check if someone has already
- * requested a transmission to the new peer; if so, we trigger
- * the next step.
+ * My client connection to the transport service.
*/
- struct GNUNET_TRANSPORT_TransmitHandle *connect_wait_head;
+ struct GNUNET_CLIENT_Connection *client;
/**
- * Linked list of transmit handles that are waiting for the
- * transport to be ready for transmission to the respective
- * peer. When we
- * receive notification that the transport disconnected from
- * a peer, we go over this list and move the entry back to
- * the connect_wait list.
+ * Handle to our registration with the client for notification.
*/
- struct GNUNET_TRANSPORT_TransmitHandle *connect_ready_head;
+ struct GNUNET_CLIENT_TransmitHandle *network_handle;
/**
* Linked list of pending requests for our HELLO.
/**
* My configuration.
*/
- struct GNUNET_CONFIGURATION_Handle *cfg;
+ const struct GNUNET_CONFIGURATION_Handle *cfg;
/**
* Linked list of the current neighbours of this peer.
struct NeighbourList *neighbours;
/**
- * ID of the task trying to reconnect to the
- * service.
+ * Peer identity as assumed by this process, or all zeros.
+ */
+ struct GNUNET_PeerIdentity self;
+
+ /**
+ * ID of the task trying to reconnect to the service.
*/
GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
+ /**
+ * ID of the task trying to trigger transmission for a peer
+ * while maintaining bandwidth quotas.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier quota_task;
+
/**
* Delay until we try to reconnect.
*/
struct GNUNET_TIME_Relative reconnect_delay;
/**
- * Do we currently have a transmission pending?
- * (schedule transmission was called but has not
- * yet succeeded)?
+ * Set once we are in the process of disconnecting from the
+ * service.
*/
- int transmission_scheduled;
+ int in_disconnect;
+
+ /**
+ * Should we check that 'self' matches what the service thinks?
+ * (if GNUNET_NO, then 'self' is all zeros!).
+ */
+ int check_self;
};
+// FIXME: replace with hash map!
+/**
+ * Get the neighbour list entry for the given peer
+ *
+ * @param h our context
+ * @param peer peer to look up
+ * @return NULL if no such peer entry exists
+ */
static struct NeighbourList *
-find_neighbour (struct GNUNET_TRANSPORT_Handle *h,
+neighbour_find (struct GNUNET_TRANSPORT_Handle *h,
const struct GNUNET_PeerIdentity *peer)
{
struct NeighbourList *pos;
/**
- * Schedule the task to send one message from the
- * connect_ready list to the service.
+ * Schedule the task to send one message, either from the control
+ * list or the peer message queues to the service.
*/
static void schedule_transmission (struct GNUNET_TRANSPORT_Handle *h);
/**
- * Transmit message to client...
+ * Function called by the scheduler when the timeout for bandwidth
+ * availablility for the target neighbour is reached.
+ *
+ * @param cls the 'struct GNUNET_TRANSPORT_Handle*'
+ * @param tc scheduler context
+ */
+static void
+quota_transmit_ready (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_TRANSPORT_Handle *h = cls;
+
+ h->quota_task = GNUNET_SCHEDULER_NO_TASK;
+ schedule_transmission (h);
+}
+
+
+/**
+ * Figure out which transmission to a peer can be done right now.
+ * If none can, schedule a task to call 'schedule_transmission'
+ * whenever a peer transmission can be done in the future and
+ * return NULL. Otherwise return the next transmission to be
+ * performed.
+ *
+ * @param h handle to transport
+ * @return NULL to wait longer before doing any peer transmissions
+ */
+static struct GNUNET_TRANSPORT_TransmitHandle *
+schedule_peer_transmission (struct GNUNET_TRANSPORT_Handle *h)
+{
+ struct GNUNET_TRANSPORT_TransmitHandle *ret;
+ struct GNUNET_TRANSPORT_TransmitHandle *th;
+ struct NeighbourList *n;
+ struct NeighbourList *next;
+ struct GNUNET_TIME_Relative retry_time;
+ struct GNUNET_TIME_Relative duration;
+
+ if (h->quota_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (h->sched,
+ h->quota_task);
+ h->quota_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ retry_time = GNUNET_TIME_UNIT_FOREVER_REL;
+ ret = NULL;
+ next = h->neighbours;
+ while (NULL != (n = next))
+ {
+ next = n->next;
+ if (n->transmit_stage != TS_QUEUED)
+ continue; /* not eligible */
+ if (n->is_connected != GNUNET_YES)
+ continue;
+
+ th = &n->transmit_handle;
+ GNUNET_break (n == th->neighbour);
+ /* check outgoing quota */
+ duration = GNUNET_BANDWIDTH_tracker_get_delay (&n->out_tracker,
+ th->notify_size - sizeof (struct OutboundMessage));
+ if (th->timeout.value < duration.value)
+ {
+ /* signal timeout! */
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Would need %llu ms before bandwidth is available for delivery to `%4s', that is too long. Signaling timeout.\n",
+ duration.value,
+ GNUNET_i2s (&n->id));
+#endif
+ if (th->notify_delay_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (h->sched, th->notify_delay_task);
+ th->notify_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ n->transmit_stage = TS_NEW;
+ if (NULL != th->notify)
+ GNUNET_assert (0 == th->notify (th->notify_cls, 0, NULL));
+ continue;
+ }
+ if (duration.value > 0)
+ {
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Need more bandwidth (%u b/s allowed, %u b needed), delaying delivery to `%4s' by %llu ms\n",
+ (unsigned int) n->out_tracker.available_bytes_per_s__,
+ (unsigned int) th->notify_size - sizeof (struct OutboundMessage),
+ GNUNET_i2s (&n->id),
+ duration.value);
+#endif
+ retry_time = GNUNET_TIME_relative_min (retry_time,
+ duration);
+ continue;
+ }
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Have %u bytes of bandwidth available for transmission to `%4s' right now\n",
+ th->notify_size - sizeof (struct OutboundMessage),
+ GNUNET_i2s (&n->id));
+#endif
+
+ if ( (ret == NULL) ||
+ (ret->priority < th->priority) )
+ ret = th;
+ }
+ if (ret == NULL)
+ h->quota_task = GNUNET_SCHEDULER_add_delayed (h->sched,
+ retry_time,
+ "a_transmit_ready,
+ h);
+ return ret;
+}
+
+
+/**
+ * Transmit message(s) to service.
+ *
+ * @param cls handle to transport
+ * @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
transport_notify_ready (void *cls, size_t size, void *buf)
{
struct GNUNET_TRANSPORT_Handle *h = cls;
+ struct ControlMessage *cm;
struct GNUNET_TRANSPORT_TransmitHandle *th;
struct NeighbourList *n;
+ struct OutboundMessage obm;
size_t ret;
+ size_t mret;
+ size_t nret;
char *cbuf;
h->network_handle = NULL;
- h->transmission_scheduled = GNUNET_NO;
if (buf == NULL)
{
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "Could not transmit to transport service, cancelling pending requests\n");
-#endif
- th = h->connect_ready_head;
- if (th->next != NULL)
- th->next->prev = NULL;
- h->connect_ready_head = th->next;
- if (NULL != (n = th->neighbour))
- {
- GNUNET_assert (n->transmit_handle == th);
- n->transmit_handle = NULL;
- }
- GNUNET_assert (0 == th->notify (th->notify_cls, 0, NULL));
- GNUNET_free (th);
+ schedule_transmission (h);
return 0;
- }
+ }
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Ready to transmit %u bytes to transport service\n", size);
#endif
cbuf = buf;
ret = 0;
- h->network_handle = NULL;
- h->transmission_scheduled = GNUNET_NO;
- do
+ while ( (NULL != (cm = h->control_head)) &&
+ (cm->notify_size <= size) )
{
- th = h->connect_ready_head;
- if (th->notify_delay_task != GNUNET_SCHEDULER_NO_PREREQUISITE_TASK)
- {
- /* remove existing time out task (only applies if
- this is not the first iteration of the loop) */
- GNUNET_SCHEDULER_cancel (h->sched,
- th->notify_delay_task);
- th->notify_delay_task = GNUNET_SCHEDULER_NO_PREREQUISITE_TASK;
- }
- GNUNET_assert (th->notify_size <= size);
- if (th->next != NULL)
- th->next->prev = NULL;
- h->connect_ready_head = th->next;
- if (NULL != (n = th->neighbour))
+ if (cm->notify_delay_task != GNUNET_SCHEDULER_NO_TASK)
{
- GNUNET_assert (n->transmit_handle == th);
- n->transmit_handle = NULL;
+ GNUNET_SCHEDULER_cancel (h->sched, cm->notify_delay_task);
+ cm->notify_delay_task = GNUNET_SCHEDULER_NO_TASK;
}
- ret += th->notify (th->notify_cls, size, &cbuf[ret]);
- GNUNET_free (th);
- if (n != NULL)
- n->last_sent += ret;
- size -= ret;
+ GNUNET_CONTAINER_DLL_remove (h->control_head,
+ h->control_tail,
+ cm);
+ nret = cm->notify (cm->notify_cls, size, &cbuf[ret]);
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Added %u bytes of control message at %u\n",
+ nret,
+ ret);
+#endif
+ GNUNET_free (cm);
+ ret += nret;
+ size -= nret;
}
- while ((h->connect_ready_head != NULL) &&
- (h->connect_ready_head->notify_size <= size));
- if (h->connect_ready_head != NULL)
- schedule_transmission (h);
+ while ( (NULL != (th = schedule_peer_transmission (h))) &&
+ (th->notify_size <= size) )
+ {
+ if (th->notify_delay_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (h->sched, th->notify_delay_task);
+ th->notify_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ n = th->neighbour;
+ switch (n->transmit_stage)
+ {
+ case TS_NEW:
+ GNUNET_break (0);
+ break;
+ case TS_QUEUED:
+ n->transmit_stage = TS_TRANSMITTED;
+ break;
+ case TS_TRANSMITTED:
+ GNUNET_break (0);
+ break;
+ case TS_TRANSMITTED_QUEUED:
+ GNUNET_break (0);
+ break;
+ default:
+ GNUNET_break (0);
+ }
+ GNUNET_assert (size >= sizeof (struct OutboundMessage));
+ mret = th->notify (th->notify_cls,
+ size - sizeof (struct OutboundMessage),
+ &cbuf[ret + sizeof (struct OutboundMessage)]);
+ GNUNET_assert (mret <= size - sizeof (struct OutboundMessage));
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Message of %u bytes with timeout %llums constructed for `%4s'\n",
+ (unsigned int) mret,
+ (unsigned long long) GNUNET_TIME_absolute_get_remaining (th->timeout).value,
+ GNUNET_i2s (&n->id));
+#endif
+ if (mret != 0)
+ {
+ GNUNET_assert (mret + sizeof (struct OutboundMessage) < GNUNET_SERVER_MAX_MESSAGE_SIZE);
+ obm.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND);
+ obm.header.size = htons (mret + sizeof (struct OutboundMessage));
+ obm.priority = htonl (th->priority);
+ obm.timeout = GNUNET_TIME_relative_hton (GNUNET_TIME_absolute_get_remaining (th->timeout));
+ obm.peer = n->id;
+ memcpy (&cbuf[ret], &obm, sizeof (struct OutboundMessage));
+ ret += (mret + sizeof (struct OutboundMessage));
+ size -= (mret + sizeof (struct OutboundMessage));
+ GNUNET_BANDWIDTH_tracker_consume (&n->out_tracker, mret);
+ }
+ else
+ {
+ switch (n->transmit_stage)
+ {
+ case TS_NEW:
+ GNUNET_break (0);
+ break;
+ case TS_QUEUED:
+ GNUNET_break (0);
+ break;
+ case TS_TRANSMITTED:
+ n->transmit_stage = TS_NEW;
+ break;
+ case TS_TRANSMITTED_QUEUED:
+ n->transmit_stage = TS_QUEUED;
+ continue;
+ default:
+ GNUNET_break (0);
+ }
+ }
+ }
+ schedule_transmission (h);
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Transmitting %u bytes to transport service\n", ret);
/**
- * Schedule the task to send one message from the
- * connect_ready list to the service.
+ * Schedule the task to send one message, either from the control
+ * list or the peer message queues to the service.
*/
static void
schedule_transmission (struct GNUNET_TRANSPORT_Handle *h)
{
+ size_t size;
+ struct GNUNET_TIME_Relative timeout;
struct GNUNET_TRANSPORT_TransmitHandle *th;
- GNUNET_assert (NULL == h->network_handle);
+ if (NULL != h->network_handle)
+ return;
if (h->client == NULL)
{
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "Could not yet schedule transmission: we are not yet connected to the transport service!\n");
- return; /* not yet connected */
- }
- th = h->connect_ready_head;
- if (th == NULL)
- return; /* no request pending */
- if (th->notify_delay_task != GNUNET_SCHEDULER_NO_PREREQUISITE_TASK)
- {
- /* remove existing time out task, will be integrated
- with transmit_ready notification! */
- GNUNET_SCHEDULER_cancel (h->sched,
- th->notify_delay_task);
- th->notify_delay_task = GNUNET_SCHEDULER_NO_PREREQUISITE_TASK;
- }
- h->transmission_scheduled = GNUNET_YES;
- h->network_handle = GNUNET_CLIENT_notify_transmit_ready (h->client,
- th->notify_size,
- GNUNET_TIME_absolute_get_remaining
- (th->timeout),
- &transport_notify_ready,
- h);
- GNUNET_assert (NULL != h->network_handle);
-}
-
-
-/**
- * Insert the given transmit handle in the given sorted
- * doubly linked list based on timeout.
- *
- * @param head pointer to the head of the linked list
- * @param th element to insert into the list
- */
-static void
-insert_transmit_handle (struct GNUNET_TRANSPORT_TransmitHandle **head,
- struct GNUNET_TRANSPORT_TransmitHandle *th)
-{
- struct GNUNET_TRANSPORT_TransmitHandle *pos;
- struct GNUNET_TRANSPORT_TransmitHandle *prev;
-
- pos = *head;
- prev = NULL;
- while ((pos != NULL) && (pos->timeout.value < th->timeout.value))
- {
- prev = pos;
- pos = pos->next;
- }
- if (prev == NULL)
- {
- th->next = *head;
- if (th->next != NULL)
- th->next->prev = th;
- *head = th;
- }
- else
- {
- th->next = pos;
- th->prev = prev;
- prev->next = th;
- if (pos != NULL)
- pos->prev = th;
- }
-}
-
-
-/**
- * Cancel a pending notify delay task (if pending) and also remove the
- * given transmit handle from whatever list is on.
- *
- * @param th handle for the transmission request to manipulate
- */
-static void
-remove_from_any_list (struct GNUNET_TRANSPORT_TransmitHandle *th)
-{
- struct GNUNET_TRANSPORT_Handle *h;
-
- h = th->handle;
- if (th->notify_delay_task != GNUNET_SCHEDULER_NO_PREREQUISITE_TASK)
- {
- GNUNET_SCHEDULER_cancel (h->sched, th->notify_delay_task);
- th->notify_delay_task = GNUNET_SCHEDULER_NO_PREREQUISITE_TASK;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ _("Could not yet schedule transmission: we are not yet connected to the transport service!\n"));
+ return; /* not yet connected */
}
- if (th->prev == NULL)
+ if (NULL != h->control_head)
{
- if (th == h->connect_wait_head)
- h->connect_wait_head = th->next;
- else
- h->connect_ready_head = th->next;
+ size = h->control_head->notify_size;
+ timeout = GNUNET_TIME_UNIT_FOREVER_REL;
}
else
{
- th->prev->next = th->next;
+ th = schedule_peer_transmission (h);
+ if (th == NULL)
+ {
+ /* no transmission ready right now */
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Could not yet schedule transmission: none ready\n");
+#endif
+ return;
+ }
+ size = th->notify_size;
+ timeout = GNUNET_TIME_absolute_get_remaining (th->timeout);
}
- if (th->next != NULL)
- th->next->prev = th->prev;
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Calling notify_transmit_ready\n");
+#endif
+ h->network_handle =
+ GNUNET_CLIENT_notify_transmit_ready (h->client,
+ size,
+ timeout,
+ GNUNET_NO,
+ &transport_notify_ready,
+ h);
+ GNUNET_assert (NULL != h->network_handle);
}
* TransmitHandle.
*/
static void
-transmit_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+control_transmit_timeout (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct GNUNET_TRANSPORT_TransmitHandle *th = cls;
-
- th->notify_delay_task = GNUNET_SCHEDULER_NO_PREREQUISITE_TASK;
- if (th->neighbour != NULL)
- th->neighbour->transmit_handle = NULL;
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "Request for transmission to peer `%s' timed out.\n",
- GNUNET_i2s(&th->target));
-#endif
- remove_from_any_list (th);
- th->notify (th->notify_cls, 0, NULL);
+ struct ControlMessage *th = cls;
+
+ th->notify_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ if (NULL != th->notify)
+ th->notify (th->notify_cls, 0, NULL);
+ GNUNET_CONTAINER_DLL_remove (th->h->control_head,
+ th->h->control_tail,
+ th);
GNUNET_free (th);
}
-
-
/**
* Queue control request for transmission to the transport
* service.
*
+ * @param h handle to the transport service
* @param size number of bytes to be transmitted
* @param at_head request must be added to the head of the queue
* (otherwise request will be appended)
size_t size,
int at_head,
struct GNUNET_TIME_Relative timeout,
- GNUNET_NETWORK_TransmitReadyNotify notify,
+ GNUNET_CONNECTION_TransmitReadyNotify notify,
void *notify_cls)
{
- struct GNUNET_TRANSPORT_TransmitHandle *th;
+ struct ControlMessage *th;
- th = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_TransmitHandle));
- th->handle = h;
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Control transmit of %u bytes within %llums requested\n",
+ size, (unsigned long long) timeout.value);
+#endif
+ th = GNUNET_malloc (sizeof (struct ControlMessage));
+ th->h = h;
th->notify = notify;
th->notify_cls = notify_cls;
- th->timeout = GNUNET_TIME_relative_to_absolute (timeout);
th->notify_size = size;
- th->notify_delay_task
+ th->notify_delay_task
= GNUNET_SCHEDULER_add_delayed (h->sched,
- GNUNET_NO,
- GNUNET_SCHEDULER_PRIORITY_KEEP,
- GNUNET_SCHEDULER_NO_PREREQUISITE_TASK,
- timeout,
- &transmit_timeout, th);
+ timeout, &control_transmit_timeout, th);
if (at_head)
- {
- th->next = h->connect_ready_head;
- h->connect_ready_head = th;
- if (th->next != NULL)
- th->next->prev = th;
- }
+ GNUNET_CONTAINER_DLL_insert (h->control_head,
+ h->control_tail,
+ th);
else
- {
- insert_transmit_handle (&h->connect_ready_head, th);
- }
- if (GNUNET_NO == h->transmission_scheduled)
- schedule_transmission (h);
-}
-
-
-/**
- * Update the quota values for the given neighbour now.
- */
-static void
-update_quota (struct NeighbourList *n)
-{
- struct GNUNET_TIME_Relative delta;
- uint64_t allowed;
- uint64_t remaining;
-
- delta = GNUNET_TIME_absolute_get_duration (n->last_quota_update);
- allowed = delta.value * n->quota_out;
- if (n->last_sent < allowed)
- {
- remaining = allowed - n->last_sent;
- if (n->quota_out > 0)
- remaining /= n->quota_out;
- else
- remaining = 0;
- if (remaining > MAX_BANDWIDTH_CARRY)
- remaining = MAX_BANDWIDTH_CARRY;
- n->last_sent = 0;
- n->last_quota_update = GNUNET_TIME_absolute_get ();
- n->last_quota_update.value -= remaining;
- }
- else
- {
- n->last_sent -= allowed;
- n->last_quota_update = GNUNET_TIME_absolute_get ();
- }
+ GNUNET_CONTAINER_DLL_insert_after (h->control_head,
+ h->control_tail,
+ h->control_tail,
+ th);
+ schedule_transmission (h);
}
struct GNUNET_TIME_Absolute timeout;
- uint32_t quota_in;
+ struct GNUNET_BANDWIDTH_Value32NBO quota_in;
};
+/**
+ * Send SET_QUOTA message to the service.
+ *
+ * @param cls the 'struct SetQuotaContext'
+ * @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_set_quota (void *cls, size_t size, void *buf)
{
if (buf == NULL)
{
GNUNET_SCHEDULER_add_continuation (sqc->handle->sched,
- GNUNET_NO,
sqc->cont,
sqc->cont_cls,
GNUNET_SCHEDULER_REASON_TIMEOUT);
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Transmitting `%s' request with respect to `%4s'.\n",
- "SET_QUOTA", GNUNET_i2s (&sqc->target));
+ "SET_QUOTA",
+ GNUNET_i2s (&sqc->target));
#endif
GNUNET_assert (size >= sizeof (struct QuotaSetMessage));
msg = buf;
msg->header.size = htons (sizeof (struct QuotaSetMessage));
msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA);
- msg->quota_in = htonl (sqc->quota_in);
+ msg->quota = sqc->quota_in;
memcpy (&msg->peer, &sqc->target, sizeof (struct GNUNET_PeerIdentity));
if (sqc->cont != NULL)
GNUNET_SCHEDULER_add_continuation (sqc->handle->sched,
- GNUNET_NO,
sqc->cont,
sqc->cont_cls,
GNUNET_SCHEDULER_REASON_PREREQ_DONE);
*
* @param handle connection to transport service
* @param target who's bandwidth quota is being changed
- * @param quota_in incoming bandwidth quota in bytes per ms; 0 can
- * be used to force all traffic to be discarded
- * @param quota_out outgoing bandwidth quota in bytes per ms; 0 can
- * be used to force all traffic to be discarded
+ * @param quota_in incoming bandwidth quota in bytes per ms
+ * @param quota_out outgoing bandwidth quota in bytes per ms
* @param timeout how long to wait until signaling failure if
* we can not communicate the quota change
* @param cont continuation to call when done, will be called
void
GNUNET_TRANSPORT_set_quota (struct GNUNET_TRANSPORT_Handle *handle,
const struct GNUNET_PeerIdentity *target,
- uint32_t quota_in,
- uint32_t quota_out,
+ struct GNUNET_BANDWIDTH_Value32NBO quota_in,
+ struct GNUNET_BANDWIDTH_Value32NBO quota_out,
struct GNUNET_TIME_Relative timeout,
GNUNET_SCHEDULER_Task cont, void *cont_cls)
{
struct NeighbourList *n;
struct SetQuotaContext *sqc;
- n = find_neighbour (handle, target);
+ n = neighbour_find (handle, target);
if (n != NULL)
{
- update_quota (n);
- if (n->quota_out < quota_out)
- n->last_quota_update = GNUNET_TIME_absolute_get ();
- n->quota_out = quota_out;
+#if DEBUG_TRANSPORT
+ if (ntohl (quota_out.value__) != n->out_tracker.available_bytes_per_s__)
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Quota changed from %u to %u for peer `%s'\n",
+ (unsigned int) n->out_tracker.available_bytes_per_s__,
+ (unsigned int) ntohl (quota_out.value__),
+ GNUNET_i2s (target));
+ else
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Quota remains at %u for peer `%s'\n",
+ (unsigned int) n->out_tracker.available_bytes_per_s__,
+ GNUNET_i2s (target));
+#endif
+ GNUNET_BANDWIDTH_tracker_update_quota (&n->out_tracker,
+ quota_out);
+ }
+ else
+ {
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Quota changed to %u for peer `%s', but I have no such neighbour!\n",
+ (unsigned int) ntohl (quota_out.value__),
+ GNUNET_i2s (target));
+#endif
}
sqc = GNUNET_malloc (sizeof (struct SetQuotaContext));
sqc->handle = handle;
}
-/**
- * A "get_hello" request has timed out. Signal the client
- * and clean up.
- */
-static void
-hello_wait_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct HelloWaitList *hwl = cls;
- struct HelloWaitList *pos;
- struct HelloWaitList *prev;
-
- prev = NULL;
- pos = hwl->handle->hwl_head;
- while (pos != hwl)
- {
- GNUNET_assert (pos != NULL);
- prev = pos;
- pos = pos->next;
- }
- if (prev == NULL)
- hwl->handle->hwl_head = hwl->next;
- else
- prev->next = hwl->next;
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Timeout trying to obtain `%s' from transport service.\n"),
- "HELLO");
- /* signal timeout */
- if (hwl->rec != NULL)
- hwl->rec (hwl->rec_cls, GNUNET_TIME_UNIT_ZERO, NULL, NULL);
- GNUNET_free (hwl);
-}
-
-
/**
* Obtain the HELLO message for this peer.
*
* @param handle connection to transport service
- * @param timeout how long to wait for the HELLO
* @param rec function to call with the HELLO, sender will be our peer
* identity; message and sender will be NULL on timeout
* (handshake with transport service pending/failed).
*/
void
GNUNET_TRANSPORT_get_hello (struct GNUNET_TRANSPORT_Handle *handle,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_TRANSPORT_ReceiveCallback rec,
+ GNUNET_TRANSPORT_HelloUpdateCallback rec,
void *rec_cls)
{
- struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
- struct GNUNET_PeerIdentity me;
struct HelloWaitList *hwl;
+ hwl = GNUNET_malloc (sizeof (struct HelloWaitList));
+ hwl->next = handle->hwl_head;
+ handle->hwl_head = hwl;
+ hwl->handle = handle;
+ hwl->rec = rec;
+ hwl->rec_cls = rec_cls;
if (handle->my_hello == NULL)
+ return;
+ rec (rec_cls, (const struct GNUNET_MessageHeader *) handle->my_hello);
+}
+
+
+
+/**
+ * Stop receiving updates about changes to our HELLO message.
+ *
+ * @param handle connection to transport service
+ * @param rec function previously registered to be called with the HELLOs
+ * @param rec_cls closure for rec
+ */
+void
+GNUNET_TRANSPORT_get_hello_cancel (struct GNUNET_TRANSPORT_Handle *handle,
+ GNUNET_TRANSPORT_HelloUpdateCallback rec,
+ void *rec_cls)
+{
+ struct HelloWaitList *pos;
+ struct HelloWaitList *prev;
+
+ prev = NULL;
+ pos = handle->hwl_head;
+ while (pos != NULL)
{
- hwl = GNUNET_malloc (sizeof (struct HelloWaitList));
- hwl->next = handle->hwl_head;
- handle->hwl_head = hwl;
- hwl->handle = handle;
- hwl->rec = rec;
- hwl->rec_cls = rec_cls;
- hwl->timeout = GNUNET_TIME_relative_to_absolute (timeout);
- hwl->task = GNUNET_SCHEDULER_add_delayed (handle->sched,
- GNUNET_YES,
- GNUNET_SCHEDULER_PRIORITY_KEEP,
- GNUNET_SCHEDULER_NO_PREREQUISITE_TASK,
- timeout,
- &hello_wait_timeout, hwl);
- return;
+ if ( (pos->rec == rec) &&
+ (pos->rec_cls == rec_cls) )
+ break;
+ prev = pos;
+ pos = pos->next;
}
- GNUNET_assert (GNUNET_OK == GNUNET_HELLO_get_key (handle->my_hello, &pk));
- GNUNET_CRYPTO_hash (&pk,
- sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
- &me.hashPubKey);
-
- rec (rec_cls,
- GNUNET_TIME_UNIT_ZERO,
- &me, (const struct GNUNET_MessageHeader *) handle->my_hello);
+ GNUNET_break (pos != NULL);
+ if (pos == NULL)
+ return;
+ if (prev == NULL)
+ handle->hwl_head = pos->next;
+ else
+ prev->next = pos->next;
+ GNUNET_free (pos);
}
+/**
+ * Send HELLO message to the service.
+ *
+ * @param cls the HELLO 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_hello (void *cls, size_t size, void *buf)
{
if (buf == NULL)
{
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+#if DEBUG_TRANSPORT_TIMEOUT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Timeout while trying to transmit `%s' request.\n",
"HELLO");
#endif
{
struct GNUNET_MessageHeader *hc;
uint16_t size;
+ struct GNUNET_PeerIdentity peer;
- if (handle->client == NULL)
- {
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "Not connected to transport service, dropping offered HELLO\n");
-#endif
- return;
- }
GNUNET_break (ntohs (hello->type) == GNUNET_MESSAGE_TYPE_HELLO);
size = ntohs (hello->size);
GNUNET_break (size >= sizeof (struct GNUNET_MessageHeader));
+ if (GNUNET_OK != GNUNET_HELLO_get_id ((const struct GNUNET_HELLO_Message*) hello,
+ &peer))
+ {
+ GNUNET_break (0);
+ return;
+ }
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Offering `%s' message of `%4s' to transport for validation.\n",
+ "HELLO",
+ GNUNET_i2s (&peer));
+#endif
hc = GNUNET_malloc (size);
memcpy (hc, hello, size);
schedule_control_transmit (handle,
/**
- * Function we use for handling incoming messages.
+ * Transmit START message to service.
+ *
+ * @param cls unused
+ * @param size number of bytes available in buf
+ * @param buf where to copy the message
+ * @return number of bytes copied to buf
*/
-static void demultiplexer (void *cls, const struct GNUNET_MessageHeader *msg);
-
-
static size_t
send_start (void *cls, size_t size, void *buf)
{
- struct GNUNET_MessageHeader *s = buf;
+ struct GNUNET_TRANSPORT_Handle *h = cls;
+ struct StartMessage s;
if (buf == NULL)
{
+ /* Can only be shutdown, just give up */
#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- "Timeout while trying to transmit `%s' request.\n",
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Shutdown while trying to transmit `%s' request.\n",
"START");
#endif
return 0;
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Transmitting `%s' request.\n", "START");
#endif
- GNUNET_assert (size >= sizeof (struct GNUNET_MessageHeader));
- s->size = htons (sizeof (struct GNUNET_MessageHeader));
- s->type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_START);
- return sizeof (struct GNUNET_MessageHeader);
+ GNUNET_assert (size >= sizeof (struct StartMessage));
+ s.header.size = htons (sizeof (struct StartMessage));
+ s.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_START);
+ s.do_check = htonl (h->check_self);
+ s.self = h->self;
+ memcpy (buf, &s, sizeof (struct StartMessage));
+ return sizeof (struct StartMessage);
}
/**
- * We're ready to transmit the request that the transport service
- * should connect to a new peer. In addition to sending the
- * request, schedule the next phase for the transmission processing
- * that caused the connect request in the first place.
+ * Free neighbour.
+ *
+ * @param n the entry to free
*/
-static size_t
-request_connect (void *cls, size_t size, void *buf)
+static void
+neighbour_free (struct NeighbourList *n)
{
- struct GNUNET_TRANSPORT_TransmitHandle *th = cls;
- struct TryConnectMessage *tcm;
struct GNUNET_TRANSPORT_Handle *h;
+ struct NeighbourList *prev;
+ struct NeighbourList *pos;
- GNUNET_assert (th->notify_delay_task == GNUNET_SCHEDULER_NO_PREREQUISITE_TASK);
- h = th->handle;
- if (buf == NULL)
- {
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Failed to transmit `%s' request for `%4s' to service.\n",
- "TRY_CONNECT",
- GNUNET_i2s(&th->target));
-#endif
- th->notify (th->notify_cls, 0, NULL);
- GNUNET_free (th);
- return 0;
- }
+ h = n->h;
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Transmitting `%s' message for `%4s'.\n",
- "TRY_CONNECT", GNUNET_i2s (&th->target));
+ "Removing neighbour `%s' from list of connected peers.\n",
+ GNUNET_i2s (&n->id));
#endif
- GNUNET_assert (size >= sizeof (struct TryConnectMessage));
- tcm = buf;
- tcm->header.size = htons (sizeof (struct TryConnectMessage));
- tcm->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_TRY_CONNECT);
- tcm->reserved = htonl (0);
- memcpy (&tcm->peer, &th->target, sizeof (struct GNUNET_PeerIdentity));
- th->notify_delay_task
- = GNUNET_SCHEDULER_add_delayed (h->sched,
- GNUNET_NO,
- GNUNET_SCHEDULER_PRIORITY_KEEP,
- GNUNET_SCHEDULER_NO_PREREQUISITE_TASK,
- GNUNET_TIME_absolute_get_remaining
- (th->timeout), &transmit_timeout, th);
- insert_transmit_handle (&h->connect_wait_head, th);
- return sizeof (struct TryConnectMessage);
+ GNUNET_break (n->is_connected == GNUNET_NO);
+ GNUNET_break (n->transmit_stage == TS_NEW);
+
+ prev = NULL;
+ pos = h->neighbours;
+ while (pos != n)
+ {
+ prev = pos;
+ pos = pos->next;
+ }
+ if (prev == NULL)
+ h->neighbours = n->next;
+ else
+ prev->next = n->next;
+ GNUNET_free (n);
}
/**
- * Schedule a request to connect to the given
- * neighbour (and if successful, add the specified
- * handle to the wait list).
+ * Mark neighbour as disconnected.
*
- * @param th handle for a request to transmit once we
- * have connected
+ * @param n the entry to mark as disconnected
*/
static void
-try_connect (struct GNUNET_TRANSPORT_TransmitHandle *th)
+neighbour_disconnect (struct NeighbourList *n)
{
- GNUNET_assert (th->notify_delay_task == GNUNET_SCHEDULER_NO_PREREQUISITE_TASK);
- schedule_control_transmit (th->handle,
- sizeof (struct TryConnectMessage),
- GNUNET_NO,
- GNUNET_TIME_absolute_get_remaining (th->timeout),
- &request_connect, th);
+ struct GNUNET_TRANSPORT_Handle *h = n->h;
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Removing neighbour `%s' from list of connected peers.\n",
+ GNUNET_i2s (&n->id));
+#endif
+ GNUNET_break (n->is_connected == GNUNET_YES);
+ n->is_connected = GNUNET_NO;
+ if (h->nc_cb != NULL)
+ h->nd_cb (h->cls, &n->id);
+ if (n->transmit_stage == TS_NEW)
+ neighbour_free (n);
}
/**
- * Remove neighbour from our list
+ * Function we use for handling incoming messages.
+ *
+ * @param cls closure (struct GNUNET_TRANSPORT_Handle *)
+ * @param msg message received, NULL on timeout or fatal error
*/
-static void
-remove_neighbour (struct GNUNET_TRANSPORT_Handle *h,
- const struct GNUNET_PeerIdentity *peer)
-{
- struct NeighbourList *prev;
- struct NeighbourList *pos;
- struct GNUNET_TRANSPORT_TransmitHandle *th;
-
- prev = NULL;
- pos = h->neighbours;
- while ((pos != NULL) &&
- (0 != memcmp (peer, &pos->id, sizeof (struct GNUNET_PeerIdentity))))
- {
- prev = pos;
- pos = pos->next;
- }
- if (pos == NULL)
- {
- GNUNET_break (0);
- return;
- }
- if (prev == NULL)
- h->neighbours = pos->next;
- else
- prev->next = pos->next;
- if (NULL != (th = pos->transmit_handle))
- {
- pos->transmit_handle = NULL;
- th->neighbour = NULL;
- remove_from_any_list (th);
- try_connect (th);
- }
- if (h->nc_cb != NULL)
- h->nd_cb (h->cls, peer);
- GNUNET_free (pos);
-}
+static void demultiplexer (void *cls,
+ const struct GNUNET_MessageHeader *msg);
/**
* Try again to connect to transport service.
+ *
+ * @param cls the handle to the transport service
+ * @param tc scheduler context
*/
static void
-reconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+reconnect (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_TRANSPORT_Handle *h = cls;
- struct GNUNET_TRANSPORT_TransmitHandle *pos;
+ struct ControlMessage *pos;
struct NeighbourList *n;
+ struct NeighbourList *next;
- /* Forget about all neighbours that we used to be connected
- to */
- while (NULL != (n = h->neighbours))
- remove_neighbour (h, &n->id);
+ h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
+ {
+ /* shutdown, just give up */
+ return;
+ }
+ /* Forget about all neighbours that we used to be connected to */
+ n = h->neighbours;
+ while (NULL != n)
+ {
+#if DEBUG_TRANSPORT_DISCONNECT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Disconnecting due to reconnect being called\n");
+#endif
+ next = n->next;
+ if (n->is_connected)
+ neighbour_disconnect (n);
+ n = next;
+ }
#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Connecting to transport service.\n");
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Connecting to transport service.\n");
#endif
GNUNET_assert (h->client == NULL);
- h->reconnect_task = GNUNET_SCHEDULER_NO_PREREQUISITE_TASK;
h->client = GNUNET_CLIENT_connect (h->sched, "transport", h->cfg);
GNUNET_assert (h->client != NULL);
- /* make sure we don't send "START" twice,
- remove existing entry from queue (if present) */
- pos = h->connect_ready_head;
+ /* make sure we don't send "START" twice, remove existing entry from
+ queue (if present) */
+ pos = h->control_head;
while (pos != NULL)
{
if (pos->notify == &send_start)
{
- if (pos->prev == NULL)
- h->connect_ready_head = pos->next;
- else
- pos->prev->next = pos->next;
- if (pos->next != NULL)
- pos->next->prev = pos->prev;
- GNUNET_assert (pos->neighbour == NULL);
+ GNUNET_CONTAINER_DLL_remove (h->control_head,
+ h->control_tail,
+ pos);
+ if (GNUNET_SCHEDULER_NO_TASK != pos->notify_delay_task)
+ {
+ GNUNET_SCHEDULER_cancel (h->sched, pos->notify_delay_task);
+ pos->notify_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ }
GNUNET_free (pos);
break;
}
pos = pos->next;
}
schedule_control_transmit (h,
- sizeof (struct GNUNET_MessageHeader),
+ sizeof (struct StartMessage),
GNUNET_YES,
- GNUNET_TIME_UNIT_FOREVER_REL, &send_start, NULL);
+ GNUNET_TIME_UNIT_FOREVER_REL, &send_start, h);
GNUNET_CLIENT_receive (h->client,
&demultiplexer, h, GNUNET_TIME_UNIT_FOREVER_REL);
}
/**
* Function that will schedule the job that will try
* to connect us again to the client.
+ *
+ * @param h transport service to reconnect
*/
static void
schedule_reconnect (struct GNUNET_TRANSPORT_Handle *h)
h->reconnect_delay.value);
#endif
GNUNET_assert (h->client == NULL);
- GNUNET_assert (h->reconnect_task == GNUNET_SCHEDULER_NO_PREREQUISITE_TASK);
+ GNUNET_assert (h->reconnect_task == GNUNET_SCHEDULER_NO_TASK);
h->reconnect_task
= GNUNET_SCHEDULER_add_delayed (h->sched,
- GNUNET_NO,
- GNUNET_SCHEDULER_PRIORITY_DEFAULT,
- GNUNET_SCHEDULER_NO_PREREQUISITE_TASK,
h->reconnect_delay, &reconnect, h);
- h->reconnect_delay = GNUNET_TIME_UNIT_SECONDS;
-}
-
-
-/**
- * We are connected to the respective peer, check the
- * bandwidth limits and schedule the transmission.
- */
-static void schedule_request (struct GNUNET_TRANSPORT_TransmitHandle *th);
-
-
-/**
- * Function called by the scheduler when the timeout
- * for bandwidth availablility for the target
- * neighbour is reached.
- */
-static void
-transmit_ready (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_TRANSPORT_TransmitHandle *th = cls;
-
- th->notify_delay_task = GNUNET_SCHEDULER_NO_PREREQUISITE_TASK;
- schedule_request (th);
-}
-
-
-/**
- * Remove the given transmit handle from the wait list. Does NOT free
- * it.
- */
-static void
-remove_from_wait_list (struct GNUNET_TRANSPORT_TransmitHandle *th)
-{
- if (th->prev == NULL)
- th->handle->connect_wait_head = th->next;
+ if (h->reconnect_delay.value == 0)
+ {
+ h->reconnect_delay = GNUNET_TIME_UNIT_MILLISECONDS;
+ }
else
- th->prev->next = th->next;
- if (th->next != NULL)
- th->next->prev = th->prev;
+ {
+ h->reconnect_delay = GNUNET_TIME_relative_multiply (h->reconnect_delay, 2);
+ h->reconnect_delay = GNUNET_TIME_relative_min (GNUNET_TIME_UNIT_SECONDS,
+ h->reconnect_delay);
+ }
}
/**
- * We are connected to the respective peer, check the
- * bandwidth limits and schedule the transmission.
+ * Send request connect message to the service.
+ *
+ * @param cls the TransportRequestConnectMessage
+ * @param size number of bytes available in buf
+ * @param buf where to copy the message
+ * @return number of bytes copied to buf
*/
-static void
-schedule_request (struct GNUNET_TRANSPORT_TransmitHandle *th)
+static size_t
+send_transport_request_connect (void *cls, size_t size, void *buf)
{
- struct GNUNET_TRANSPORT_Handle *h;
- struct GNUNET_TIME_Relative duration;
- struct NeighbourList *n;
- uint64_t available;
+ struct TransportRequestConnectMessage *trcm = cls;
- h = th->handle;
- n = th->neighbour;
- if (th->notify_delay_task != GNUNET_SCHEDULER_NO_PREREQUISITE_TASK)
- {
- GNUNET_SCHEDULER_cancel (h->sched, th->notify_delay_task);
- th->notify_delay_task = GNUNET_SCHEDULER_NO_PREREQUISITE_TASK;
- }
- /* check outgoing quota */
- duration = GNUNET_TIME_absolute_get_duration (n->last_quota_update);
- if (duration.value > MIN_QUOTA_REFRESH_TIME)
- {
- update_quota (n);
- duration = GNUNET_TIME_absolute_get_duration (n->last_quota_update);
- }
- available = duration.value * n->quota_out;
- if (available < n->last_sent + th->notify_size)
+ if (buf == NULL)
{
- /* calculate how much bandwidth we'd still need to
- accumulate and based on that how long we'll have
- to wait... */
- available = n->last_sent + th->notify_size - available;
- duration = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
- available / n->quota_out);
- if (th->timeout.value <
- GNUNET_TIME_relative_to_absolute (duration).value)
- {
- /* signal timeout! */
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Would need %llu ms before bandwidth is available for delivery to `%4s', that is too long. Signaling timeout.\n",
- duration.value,
- GNUNET_i2s(&th->target));
-#endif
- remove_from_wait_list (th);
- th->notify (th->notify_cls, 0, NULL);
- GNUNET_free (th);
- return;
- }
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Need more bandwidth, delaying delivery to `%4s' by %llu ms\n",
- GNUNET_i2s(&th->target),
- duration.value);
+ "Buffer null for %s\n",
+ "REQUEST_CONNECT");
#endif
- th->notify_delay_task
- = GNUNET_SCHEDULER_add_delayed (h->sched,
- GNUNET_NO,
- GNUNET_SCHEDULER_PRIORITY_KEEP,
- GNUNET_SCHEDULER_NO_PREREQUISITE_TASK,
- duration, &transmit_ready, th);
- return;
+ GNUNET_free (trcm);
+ return 0;
}
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Bandwidth available for transmission to `%4s'\n",
- GNUNET_i2s (&n->id));
-#endif
- if (GNUNET_NO == n->transmit_ok)
- {
- /* we may be ready, but transport service is not;
- wait for SendOkMessage or timeout */
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Need to wait for transport service `%s' message\n",
- "SEND_OK");
-#endif
- th->notify_delay_task
- = GNUNET_SCHEDULER_add_delayed (h->sched,
- GNUNET_NO,
- GNUNET_SCHEDULER_PRIORITY_KEEP,
- GNUNET_SCHEDULER_NO_PREREQUISITE_TASK,
- GNUNET_TIME_absolute_get_remaining
- (th->timeout), &transmit_timeout, th);
- return;
- }
- n->transmit_ok = GNUNET_NO;
- remove_from_wait_list (th);
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Moving message for `%4s' to ready list\n",
- GNUNET_i2s(&n->id));
+ "Transmitting `%s' request for `%4s'.\n",
+ "REQUEST_CONNECT",
+ GNUNET_i2s (&trcm->peer));
#endif
- insert_transmit_handle (&h->connect_ready_head, th);
- if (GNUNET_NO == h->transmission_scheduled)
- schedule_transmission (h);
+ GNUNET_assert (size >= sizeof (struct TransportRequestConnectMessage));
+ memcpy(buf, trcm, sizeof(struct TransportRequestConnectMessage));
+ return sizeof(struct TransportRequestConnectMessage);
}
+/**
+ * Create and send a request connect message to
+ * the transport service for a particular peer.
+ *
+ * @param h handle to the transport service
+ * @param n the neighbor to send the request connect message about
+ *
+ */
+static void send_request_connect_message(struct GNUNET_TRANSPORT_Handle *h, struct NeighbourList *n)
+{
+ struct TransportRequestConnectMessage *trcm;
+
+ trcm = GNUNET_malloc(sizeof(struct TransportRequestConnectMessage));
+ trcm->header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT);
+ trcm->header.size = htons(sizeof(struct TransportRequestConnectMessage));
+ memcpy(&trcm->peer, &n->id, sizeof(struct GNUNET_PeerIdentity));
+ schedule_control_transmit (h,
+ sizeof (struct TransportRequestConnectMessage),
+ GNUNET_NO,
+ GNUNET_TIME_UNIT_FOREVER_REL, &send_transport_request_connect, trcm);
+}
/**
* Add neighbour to our list
+ *
+ * @return NULL if this API is currently disconnecting from the service
*/
-static void
-add_neighbour (struct GNUNET_TRANSPORT_Handle *h,
- uint32_t quota_out,
- struct GNUNET_TIME_Relative latency,
+static struct NeighbourList *
+neighbour_add (struct GNUNET_TRANSPORT_Handle *h,
const struct GNUNET_PeerIdentity *pid)
{
struct NeighbourList *n;
- struct GNUNET_TRANSPORT_TransmitHandle *prev;
- struct GNUNET_TRANSPORT_TransmitHandle *pos;
- struct GNUNET_TRANSPORT_TransmitHandle *next;
+ if (GNUNET_YES == h->in_disconnect)
+ return NULL;
/* check for duplicates */
- if (NULL != find_neighbour (h, pid))
+ if (NULL != (n = neighbour_find (h, pid)))
{
GNUNET_break (0);
- return;
+ return n;
}
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Creating entry for new neighbour `%4s'.\n", GNUNET_i2s (pid));
+ "Creating entry for neighbour `%4s'.\n",
+ GNUNET_i2s (pid));
#endif
n = GNUNET_malloc (sizeof (struct NeighbourList));
n->id = *pid;
- n->last_quota_update = GNUNET_TIME_absolute_get ();
- n->quota_out = quota_out;
+ GNUNET_BANDWIDTH_tracker_init (&n->out_tracker,
+ GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
+ MAX_BANDWIDTH_CARRY_S);
n->next = h->neighbours;
- n->transmit_ok = GNUNET_YES;
+ n->h = h;
h->neighbours = n;
- if (h->nc_cb != NULL)
- h->nc_cb (h->cls, &n->id, latency);
- prev = NULL;
- pos = h->connect_wait_head;
- while (pos != NULL)
- {
- next = pos->next;
- if (0 == memcmp (pid,
- &pos->target, sizeof (struct GNUNET_PeerIdentity)))
- {
- pos->neighbour = n;
- GNUNET_assert (NULL == n->transmit_handle);
- n->transmit_handle = pos;
- if (prev == NULL)
- h->connect_wait_head = next;
- else
- prev->next = next;
- if (GNUNET_YES == n->received_ack)
- {
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Found pending request for `%4s' will trigger it now.\n",
- GNUNET_i2s (&pos->target));
-#endif
- if (pos->notify_delay_task != GNUNET_SCHEDULER_NO_PREREQUISITE_TASK)
- {
- GNUNET_SCHEDULER_cancel (h->sched, pos->notify_delay_task);
- pos->notify_delay_task = GNUNET_SCHEDULER_NO_PREREQUISITE_TASK;
- }
- schedule_request (pos);
- }
- else
- {
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Found pending request for `%4s' but still need `%s' before proceeding.\n",
- GNUNET_i2s (&pos->target),
- "ACK");
-#endif
- }
- break;
- }
- prev = pos;
- pos = next;
- }
+
+
+ return n;
}
* Connect to the transport service. Note that the connection may
* complete (or fail) asynchronously.
*
-
* @param sched scheduler to use
* @param cfg configuration to use
+ * @param self our own identity (API should check that it matches
+ * the identity found by transport), or NULL (no check)
* @param cls closure for the callbacks
* @param rec receive function to call
* @param nc function to call on connect events
- * @param dc function to call on disconnect events
+ * @param nd function to call on disconnect events
*/
struct GNUNET_TRANSPORT_Handle *
GNUNET_TRANSPORT_connect (struct GNUNET_SCHEDULER_Handle *sched,
- struct GNUNET_CONFIGURATION_Handle *cfg,
+ const struct GNUNET_CONFIGURATION_Handle *cfg,
+ const struct GNUNET_PeerIdentity *self,
void *cls,
GNUNET_TRANSPORT_ReceiveCallback rec,
GNUNET_TRANSPORT_NotifyConnect nc,
{
struct GNUNET_TRANSPORT_Handle *ret;
- GNUNET_ARM_start_service ("peerinfo",
- cfg, sched, START_SERVICE_TIMEOUT, NULL, NULL);
- GNUNET_ARM_start_service ("transport",
- cfg, sched, START_SERVICE_TIMEOUT, NULL, NULL);
ret = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_Handle));
+ if (self != NULL)
+ {
+ ret->self = *self;
+ ret->check_self = GNUNET_YES;
+ }
ret->sched = sched;
ret->cfg = cfg;
ret->cls = cls;
}
-/**
- * These stop activities must be run in a fresh
- * scheduler that is NOT in shutdown mode.
- */
-static void
-stop_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_TRANSPORT_Handle *handle = cls;
- GNUNET_ARM_stop_service ("transport",
- handle->cfg,
- tc->sched, STOP_SERVICE_TIMEOUT, NULL, NULL);
- GNUNET_ARM_stop_service ("peerinfo",
- handle->cfg,
- tc->sched, STOP_SERVICE_TIMEOUT, NULL, NULL);
-}
-
-
/**
* Disconnect from the transport service.
*/
struct NeighbourList *n;
struct HelloWaitList *hwl;
struct GNUNET_CLIENT_Connection *client;
+ struct ControlMessage *cm;
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Transport disconnect called!\n");
#endif
- while (NULL != (th = handle->connect_ready_head))
- {
- handle->connect_ready_head = th->next;
- th->notify (th->notify_cls, 0, NULL);
- GNUNET_free (th);
- }
- while (NULL != (th = handle->connect_wait_head))
- {
- handle->connect_wait_head = th->next;
- if (th->notify_delay_task != GNUNET_SCHEDULER_NO_PREREQUISITE_TASK)
- {
- GNUNET_SCHEDULER_cancel (handle->sched, th->notify_delay_task);
- th->notify_delay_task = GNUNET_SCHEDULER_NO_PREREQUISITE_TASK;
- }
- th->notify (th->notify_cls, 0, NULL);
- GNUNET_free (th);
- }
+ handle->in_disconnect = GNUNET_YES;
while (NULL != (n = handle->neighbours))
{
handle->neighbours = n->next;
+ switch (n->transmit_stage)
+ {
+ case TS_NEW:
+ case TS_TRANSMITTED:
+ /* nothing to do */
+ break;
+ case TS_QUEUED:
+ case TS_TRANSMITTED_QUEUED:
+ th = &n->transmit_handle;
+ if (th->notify_delay_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (handle->sched,
+ th->notify_delay_task);
+ th->notify_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ GNUNET_assert (0 == th->notify (th->notify_cls, 0, NULL));
+ break;
+ default:
+ GNUNET_break (0);
+ }
GNUNET_free (n);
}
while (NULL != (hwl = handle->hwl_head))
{
handle->hwl_head = hwl->next;
- GNUNET_SCHEDULER_cancel (handle->sched, hwl->task);
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Disconnect while trying to obtain `%s' from transport service.\n"),
- "HELLO");
+ _
+ ("Disconnect while notification for `%s' still registered.\n"),
+ "HELLO");
if (hwl->rec != NULL)
- hwl->rec (hwl->rec_cls, GNUNET_TIME_UNIT_ZERO, NULL, NULL);
+ hwl->rec (hwl->rec_cls, NULL);
GNUNET_free (hwl);
}
- if (handle->reconnect_task != GNUNET_SCHEDULER_NO_PREREQUISITE_TASK)
+
+ /* Check for still scheduled control messages, cancel delay tasks if so */
+ /* Added because somehow a notify_delay_task is remaining scheduled and is ever so annoying */
+ while ( (NULL != (cm = handle->control_head)))
+ {
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Disconnect before control message sent!\n");
+#endif
+ if (cm->notify_delay_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (handle->sched, cm->notify_delay_task);
+ cm->notify_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ GNUNET_CONTAINER_DLL_remove (handle->control_head,
+ handle->control_tail,
+ cm);
+ GNUNET_free (cm);
+ }
+ /* end check */
+
+ if (handle->reconnect_task != GNUNET_SCHEDULER_NO_TASK)
{
GNUNET_SCHEDULER_cancel (handle->sched, handle->reconnect_task);
- handle->reconnect_task = GNUNET_SCHEDULER_NO_PREREQUISITE_TASK;
+ handle->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (handle->quota_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (handle->sched, handle->quota_task);
+ handle->quota_task = GNUNET_SCHEDULER_NO_TASK;
}
GNUNET_free_non_null (handle->my_hello);
handle->my_hello = NULL;
- GNUNET_SCHEDULER_run (&stop_task, handle);
+
+ if (NULL != handle->network_handle)
+ {
+ GNUNET_CLIENT_notify_transmit_ready_cancel (handle->network_handle);
+ handle->network_handle = NULL;
+ }
if (NULL != (client = handle->client))
{
#if DEBUG_TRANSPORT
"Disconnecting from transport service for good.\n");
#endif
handle->client = NULL;
- GNUNET_CLIENT_disconnect (client);
+ GNUNET_CLIENT_disconnect (client, GNUNET_NO);
}
- if (client == NULL)
- GNUNET_free (handle);
+ GNUNET_free (handle);
}
/**
- * Type of a function to call when we receive a message
- * from the service.
+ * Function we use for handling incoming messages.
*
- * @param cls closure
+ * @param cls closure (struct GNUNET_TRANSPORT_Handle *)
* @param msg message received, NULL on timeout or fatal error
*/
static void
const struct GNUNET_MessageHeader *imm;
const struct SendOkMessage *okm;
struct HelloWaitList *hwl;
+ struct HelloWaitList *next_hwl;
struct NeighbourList *n;
- struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
struct GNUNET_PeerIdentity me;
- struct GNUNET_TRANSPORT_TransmitHandle *th;
uint16_t size;
- if ((msg == NULL) || (h->client == NULL))
+ if (h->client == NULL)
+ {
+ /* shutdown initiated from 'GNUNET_TRANSPORT_disconnect',
+ finish clean up work! */
+ GNUNET_free (h);
+ return;
+ }
+ if (msg == NULL)
{
- if (h->client != NULL)
- {
#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- "Error receiving from transport service, disconnecting temporarily.\n");
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "Error receiving from transport service, disconnecting temporarily.\n");
#endif
- if (h->network_handle != NULL)
- {
- GNUNET_NETWORK_notify_transmit_ready_cancel (h->network_handle);
- h->network_handle = NULL;
- h->transmission_scheduled = GNUNET_NO;
- th = h->connect_ready_head;
- /* add timeout again, we cancelled the transmit_ready task! */
- GNUNET_assert (th->notify_delay_task == GNUNET_SCHEDULER_NO_PREREQUISITE_TASK);
- th->notify_delay_task
- = GNUNET_SCHEDULER_add_delayed (h->sched,
- GNUNET_NO,
- GNUNET_SCHEDULER_PRIORITY_KEEP,
- GNUNET_SCHEDULER_NO_PREREQUISITE_TASK,
- GNUNET_TIME_absolute_get_remaining(th->timeout),
- &transmit_timeout,
- th);
- }
- GNUNET_CLIENT_disconnect (h->client);
- h->client = NULL;
- schedule_reconnect (h);
- }
- else
- {
- /* shutdown initiated from 'GNUNET_TRANSPORT_disconnect',
- finish clean up work! */
- GNUNET_free (h);
- }
+ if (h->network_handle != NULL)
+ {
+ GNUNET_CLIENT_notify_transmit_ready_cancel (h->network_handle);
+ h->network_handle = NULL;
+ }
+ GNUNET_CLIENT_disconnect (h->client, GNUNET_NO);
+ h->client = NULL;
+ schedule_reconnect (h);
return;
}
GNUNET_CLIENT_receive (h->client,
{
case GNUNET_MESSAGE_TYPE_HELLO:
if (GNUNET_OK !=
- GNUNET_HELLO_get_key ((const struct GNUNET_HELLO_Message *) msg,
- &pkey))
+ GNUNET_HELLO_get_id ((const struct GNUNET_HELLO_Message *) msg,
+ &me))
{
GNUNET_break (0);
break;
}
- GNUNET_CRYPTO_hash (&pkey,
- sizeof (struct
- GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
- &me.hashPubKey);
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Receiving (my own) `%s' message, I am `%4s'.\n",
}
h->my_hello = GNUNET_malloc (size);
memcpy (h->my_hello, msg, size);
- while (NULL != (hwl = h->hwl_head))
+ hwl = h->hwl_head;
+ while (NULL != hwl)
{
- h->hwl_head = hwl->next;
- GNUNET_SCHEDULER_cancel (h->sched, hwl->task);
- GNUNET_TRANSPORT_get_hello (h,
- GNUNET_TIME_UNIT_ZERO,
- hwl->rec, hwl->rec_cls);
- GNUNET_free (hwl);
+ next_hwl = hwl->next;
+ hwl->rec (hwl->rec_cls,
+ (const struct GNUNET_MessageHeader *) h->my_hello);
+ hwl = next_hwl;
}
break;
case GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT:
"Receiving `%s' message for `%4s'.\n",
"CONNECT", GNUNET_i2s (&cim->id));
#endif
- add_neighbour (h,
- ntohl (cim->quota_out),
- GNUNET_TIME_relative_ntoh (cim->latency), &cim->id);
+ n = neighbour_find (h, &cim->id);
+ if (n == NULL)
+ n = neighbour_add (h,
+ &cim->id);
+ if (n == NULL)
+ return;
+ GNUNET_break (n->is_connected == GNUNET_NO);
+ n->is_connected = GNUNET_YES;
+ if (h->nc_cb != NULL)
+ h->nc_cb (h->cls, &n->id,
+ GNUNET_TIME_relative_ntoh (cim->latency),
+ ntohl (cim->distance));
break;
case GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT:
if (size != sizeof (struct DisconnectInfoMessage))
break;
}
dim = (const struct DisconnectInfoMessage *) msg;
-#if DEBUG_TRANSPORT
+#if DEBUG_TRANSPORT_DISCONNECT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Receiving `%s' message for `%4s'.\n",
- "DISCONNECT", GNUNET_i2s (&dim->peer));
+ "DISCONNECT",
+ GNUNET_i2s (&dim->peer));
#endif
- remove_neighbour (h, &dim->peer);
+ n = neighbour_find (h, &dim->peer);
+ GNUNET_break (n != NULL);
+ if (n != NULL)
+ neighbour_disconnect (n);
break;
case GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK:
if (size != sizeof (struct SendOkMessage))
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Receiving `%s' message, transmission %s.\n", "SEND_OK",
- ntohl(okm->success) == GNUNET_OK ? "succeeded" : "failed");
+ ntohl (okm->success) == GNUNET_OK ? "succeeded" : "failed");
#endif
- n = find_neighbour (h, &okm->peer);
+ n = neighbour_find (h, &okm->peer);
GNUNET_assert (n != NULL);
- n->transmit_ok = GNUNET_YES;
- if (n->transmit_handle != NULL)
- {
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Processing pending message\n");
-#endif
- GNUNET_SCHEDULER_cancel (h->sched,
- n->transmit_handle->notify_delay_task);
- n->transmit_handle->notify_delay_task =
- GNUNET_SCHEDULER_NO_PREREQUISITE_TASK;
- GNUNET_assert (GNUNET_YES == n->received_ack);
- schedule_request (n->transmit_handle);
- }
+ switch (n->transmit_stage)
+ {
+ case TS_NEW:
+ GNUNET_break (0);
+ break;
+ case TS_QUEUED:
+ GNUNET_break (0);
+ break;
+ case TS_TRANSMITTED:
+ n->transmit_stage = TS_NEW;
+ break;
+ case TS_TRANSMITTED_QUEUED:
+ n->transmit_stage = TS_QUEUED;
+ schedule_transmission (h);
+ break;
+ default:
+ GNUNET_break (0);
+ }
break;
case GNUNET_MESSAGE_TYPE_TRANSPORT_RECV:
#if DEBUG_TRANSPORT
GNUNET_break (0);
break;
}
- switch (ntohs (imm->type))
- {
- case GNUNET_MESSAGE_TYPE_TRANSPORT_ACK:
#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Receiving `%s' message from `%4s'.\n",
- "ACK", GNUNET_i2s (&im->peer));
-#endif
- n = find_neighbour (h, &im->peer);
- if (n == NULL)
- {
- GNUNET_break (0);
- break;
- }
- if (n->received_ack == GNUNET_NO)
- {
- n->received_ack = GNUNET_YES;
- if (NULL != n->transmit_handle)
- {
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Peer connected, scheduling delayed message for deliverery now.\n");
-#endif
- schedule_request (n->transmit_handle);
- }
- }
- break;
- default:
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received message of type %u from `%4s'.\n",
- ntohs (imm->type), GNUNET_i2s (&im->peer));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received message of type %u from `%4s'.\n",
+ ntohs (imm->type), GNUNET_i2s (&im->peer));
#endif
- if (h->rec != NULL)
- h->rec (h->cls,
- GNUNET_TIME_relative_ntoh (im->latency), &im->peer, imm);
- break;
- }
+ n = neighbour_find (h, &im->peer);
+ if (n == NULL)
+ {
+ GNUNET_break (0);
+ break;
+ }
+ if (n->is_connected != GNUNET_YES)
+ {
+ GNUNET_break (0);
+ break;
+ }
+ if (h->rec != NULL)
+ h->rec (h->cls, &im->peer, imm,
+ GNUNET_TIME_relative_ntoh (im->latency), ntohl(im->distance));
break;
default:
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
}
-struct ClientTransmitWrapper
-{
- GNUNET_NETWORK_TransmitReadyNotify notify;
- void *notify_cls;
- struct GNUNET_TRANSPORT_TransmitHandle *th;
-};
-
-
/**
- * Transmit message of a client destined for another
- * peer to the service.
+ * Called when our transmit request timed out before any transport
+ * reported success connecting to the desired peer or before the
+ * transport was ready to receive. Signal error and free
+ * TransmitHandle.
+ *
+ * @param cls the 'struct GNUNET_TRANSPORT_TransmitHandle*' that is timing out
+ * @param tc scheduler context
*/
-static size_t
-client_notify_wrapper (void *cls, size_t size, void *buf)
+static void
+peer_transmit_timeout (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct ClientTransmitWrapper *ctw = cls;
- struct OutboundMessage *obm;
- struct GNUNET_MessageHeader *hdr;
- size_t ret;
+ struct GNUNET_TRANSPORT_TransmitHandle *th = cls;
+ struct NeighbourList *n;
+ GNUNET_CONNECTION_TransmitReadyNotify notify;
+ void *notify_cls;
- if (size == 0)
- {
+ th->notify_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ n = th->neighbour;
#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Transmission request could not be satisfied.\n");
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "Triggering timeout for request to transmit to `%4s' (%d)\n",
+ GNUNET_i2s (&n->id),
+ n->transmit_stage);
#endif
- ret = ctw->notify (ctw->notify_cls, 0, NULL);
- GNUNET_assert (ret == 0);
- GNUNET_free (ctw);
- return 0;
- }
- GNUNET_assert (size >= sizeof (struct OutboundMessage));
- obm = buf;
- ret = ctw->notify (ctw->notify_cls,
- size - sizeof (struct OutboundMessage),
- (void *) &obm[1]);
- if (ret == 0)
+ notify = th->notify;
+ notify_cls = th->notify_cls;
+ switch (n->transmit_stage)
{
- /* Need to reset flag, no SEND means no SEND_OK! */
- ctw->th->neighbour->transmit_ok = GNUNET_YES;
- GNUNET_free (ctw);
- return 0;
+ case TS_NEW:
+ GNUNET_break (0);
+ break;
+ case TS_QUEUED:
+ n->transmit_stage = TS_NEW;
+ if (n->is_connected == GNUNET_NO)
+ neighbour_free (n);
+ break;
+ case TS_TRANSMITTED:
+ GNUNET_break (0);
+ break;
+ case TS_TRANSMITTED_QUEUED:
+ n->transmit_stage = TS_TRANSMITTED;
+ break;
+ default:
+ GNUNET_break (0);
}
- GNUNET_assert (ret >= sizeof (struct GNUNET_MessageHeader));
- hdr = (struct GNUNET_MessageHeader *) &obm[1];
- GNUNET_assert (ntohs (hdr->size) == ret);
- GNUNET_assert (ret + sizeof (struct OutboundMessage) <
- GNUNET_SERVER_MAX_MESSAGE_SIZE);
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Transmitting `%s' message with data for `%4s'\n",
- "SEND", GNUNET_i2s (&ctw->th->target));
-#endif
- ret += sizeof (struct OutboundMessage);
- obm->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND);
- obm->header.size = htons (ret);
- obm->reserved = htonl (0);
- obm->peer = ctw->th->target;
- GNUNET_free (ctw);
- return ret;
+ if (NULL != notify)
+ notify (notify_cls, 0, NULL);
}
-
/**
* Check if we could queue a message of the given size for
* transmission. The transport service will take both its
* @param handle connection to transport service
* @param target who should receive the message
* @param size how big is the message we want to transmit?
+ * @param priority how important is the message?
* @param timeout after how long should we give up (and call
* notify with buf NULL and size 0)?
* @param notify function to call when we are ready to
*handle,
const struct GNUNET_PeerIdentity
*target, size_t size,
+ unsigned int priority,
struct GNUNET_TIME_Relative timeout,
- GNUNET_NETWORK_TransmitReadyNotify
+ GNUNET_CONNECTION_TransmitReadyNotify
notify, void *notify_cls)
{
- struct GNUNET_TRANSPORT_TransmitHandle *pos;
struct GNUNET_TRANSPORT_TransmitHandle *th;
struct NeighbourList *n;
- struct ClientTransmitWrapper *ctw;
if (size + sizeof (struct OutboundMessage) >=
GNUNET_SERVER_MAX_MESSAGE_SIZE)
{
+#if DEBUG_TRANSPORT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Message size is %d, max allowed is %d.\n",
+ size + sizeof (struct OutboundMessage), GNUNET_SERVER_MAX_MESSAGE_SIZE - 1);
+#endif
GNUNET_break (0);
return NULL;
}
-#if DEBUG_TRANSPORT
+
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Asking transport service for transmission of %u bytes to peer `%4s'.\n",
- size, GNUNET_i2s (target));
-#endif
- n = find_neighbour (handle, target);
- ctw = GNUNET_malloc (sizeof (struct ClientTransmitWrapper));
- th = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_TransmitHandle));
- ctw->notify = notify;
- ctw->notify_cls = notify_cls;
- ctw->th = th;
- th->handle = handle;
- th->target = *target;
- th->notify = &client_notify_wrapper;
- th->notify_cls = ctw;
- th->notify_size = size + sizeof (struct OutboundMessage);
- th->timeout = GNUNET_TIME_relative_to_absolute (timeout);
- th->neighbour = n;
- if (NULL == n)
+ "Asking transport service for transmission of %u bytes to peer `%4s' within %llu ms.\n",
+ size, GNUNET_i2s (target),
+ (unsigned long long) timeout.value);
+
+ n = neighbour_find (handle, target);
+ if (n == NULL)
{
- pos = handle->connect_wait_head;
- while (pos != NULL)
- {
- GNUNET_assert (0 != memcmp (target,
- &pos->target,
- sizeof (struct GNUNET_PeerIdentity)));
- pos = pos->next;
- }
-#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Will now try to connect to `%4s'.\n", GNUNET_i2s (target));
-#endif
- try_connect (th);
- return th;
+ "Created neighbour entry for peer `%s'\n",
+ GNUNET_i2s (target));
+ n = neighbour_add (handle, target);
+
}
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Transmission request queued for transmission to transport service.\n");
-#endif
- GNUNET_assert (NULL == n->transmit_handle);
- n->transmit_handle = th;
- if (GNUNET_YES != n->received_ack)
+ /**
+ * Send a request connect message if not connected,
+ * otherwise we will never send anything to
+ * transport service
+ */
+ if (n->is_connected == GNUNET_NO)
+ {
+ send_request_connect_message(handle, n);
+ }
+
+ if (n == NULL)
{
-#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Connection to `%4s' is not yet confirmed connected, scheduling timeout (%llu ms) only.\n",
- GNUNET_i2s (target), timeout.value);
-#endif
- th->notify_delay_task
- = GNUNET_SCHEDULER_add_delayed (handle->sched,
- GNUNET_NO,
- GNUNET_SCHEDULER_PRIORITY_KEEP,
- GNUNET_SCHEDULER_NO_PREREQUISITE_TASK,
- timeout, &transmit_timeout, th);
- return th;
+ "Could not create neighbour entry for peer `%s'\n",
+ GNUNET_i2s (target));
+ return NULL;
}
-
-#if DEBUG_TRANSPORT
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Peer `%4s' is ready to receive, scheduling message for delivery now.\n",
- GNUNET_i2s (target));
-#endif
- schedule_request (th);
+ switch (n->transmit_stage)
+ {
+ case TS_NEW:
+ n->transmit_stage = TS_QUEUED;
+ break;
+ case TS_QUEUED:
+ GNUNET_break (0);
+ return NULL;
+ case TS_TRANSMITTED:
+ n->transmit_stage = TS_TRANSMITTED_QUEUED;
+ break;
+ case TS_TRANSMITTED_QUEUED:
+ GNUNET_break (0);
+ return NULL;
+ default:
+ GNUNET_break (0);
+ return NULL;
+ }
+ th = &n->transmit_handle;
+ th->neighbour = n;
+ th->notify = notify;
+ th->notify_cls = notify_cls;
+ th->timeout = GNUNET_TIME_relative_to_absolute (timeout);
+ th->notify_size = size + sizeof (struct OutboundMessage);
+ th->priority = priority;
+ th->notify_delay_task
+ = GNUNET_SCHEDULER_add_delayed (handle->sched, timeout,
+ &peer_transmit_timeout, th);
+ schedule_transmission (handle);
return th;
}
/**
- * Cancel the specified transmission-ready
- * notification.
+ * Cancel the specified transmission-ready notification.
*/
void
GNUNET_TRANSPORT_notify_transmit_ready_cancel (struct
GNUNET_TRANSPORT_TransmitHandle
*th)
{
- struct GNUNET_TRANSPORT_Handle *h;
+ struct NeighbourList *n;
+ n = th->neighbour;
#if DEBUG_TRANSPORT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Transmission request of %u bytes to `%4s' was cancelled.\n",
- th->notify_size - sizeof(struct OutboundMessage),
- GNUNET_i2s (&th->target));
+ "Transmission request of %u bytes to `%4s' was cancelled.\n",
+ th->notify_size - sizeof (struct OutboundMessage),
+ GNUNET_i2s (&n->id));
#endif
- GNUNET_assert (th->notify == &client_notify_wrapper);
- remove_from_any_list (th);
- h = th->handle;
- if ((h->connect_ready_head == NULL) && (h->network_handle != NULL))
+ switch (n->transmit_stage)
{
- GNUNET_NETWORK_notify_transmit_ready_cancel (h->network_handle);
- h->network_handle = NULL;
- h->transmission_scheduled = GNUNET_NO;
+ case TS_NEW:
+ GNUNET_break (0);
+ break;
+ case TS_QUEUED:
+ n->transmit_stage = TS_NEW;
+ if (n->is_connected == GNUNET_NO)
+ neighbour_free (n);
+ break;
+ case TS_TRANSMITTED:
+ GNUNET_break (0);
+ break;
+ case TS_TRANSMITTED_QUEUED:
+ n->transmit_stage = TS_TRANSMITTED;
+ break;
+ default:
+ GNUNET_break (0);
}
- GNUNET_free (th->notify_cls);
- GNUNET_free (th);
}
projects / oweals / gnunet.git / blobdiff