/*
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
* @author Christian Grothoff
*/
#include "platform.h"
+#include "gnunet_constants.h"
#include "gnunet_core_service.h"
#include "core.h"
/**
- * Context for the core service connection.
+ * Information we track for each peer.
*/
-struct GNUNET_CORE_Handle
+struct PeerRecord
{
/**
- * Our scheduler.
+ * We generally do NOT keep peer records in a DLL; this
+ * DLL is only used IF this peer's 'pending_head' message
+ * is ready for transmission.
+ */
+ struct PeerRecord *prev;
+
+ /**
+ * We generally do NOT keep peer records in a DLL; this
+ * DLL is only used IF this peer's 'pending_head' message
+ * is ready for transmission.
+ */
+ struct PeerRecord *next;
+
+ /**
+ * Peer the record is about.
+ */
+ struct GNUNET_PeerIdentity peer;
+
+ /**
+ * Corresponding core handle.
+ */
+ struct GNUNET_CORE_Handle *ch;
+
+ /**
+ * Head of doubly-linked list of pending requests.
+ * Requests are sorted by deadline *except* for HEAD,
+ * which is only modified upon transmission to core.
+ */
+ struct GNUNET_CORE_TransmitHandle *pending_head;
+
+ /**
+ * Tail of doubly-linked list of pending requests.
+ */
+ struct GNUNET_CORE_TransmitHandle *pending_tail;
+
+ /**
+ * Pending callback waiting for peer information, or NULL for none.
+ */
+ GNUNET_CORE_PeerConfigurationInfoCallback pcic;
+
+ /**
+ * Closure for pcic.
+ */
+ void *pcic_cls;
+
+ /**
+ * Request information ID for the given pcic (needed in case a
+ * request is cancelled after being submitted to core and a new
+ * one is generated; in this case, we need to avoid matching the
+ * reply to the first (cancelled) request to the second request).
+ */
+ uint32_t rim_id;
+
+ /**
+ * ID of timeout task for the 'pending_head' handle
+ * which is the one with the smallest timeout.
*/
- struct GNUNET_SCHEDULER_Handle *sched;
+ GNUNET_SCHEDULER_TaskIdentifier timeout_task;
+
+ /**
+ * Current size of the queue of pending requests.
+ */
+ unsigned int queue_size;
+
+ /**
+ * SendMessageRequest ID generator for this peer.
+ */
+ uint16_t smr_id_gen;
+
+};
+
+
+/**
+ * Entry in a doubly-linked list of control messages to be transmitted
+ * to the core service. Control messages include traffic allocation,
+ * connection requests and of course our initial 'init' request.
+ *
+ * The actual message is allocated at the end of this struct.
+ */
+struct ControlMessage
+{
+ /**
+ * This is a doubly-linked list.
+ */
+ struct ControlMessage *next;
+
+ /**
+ * This is a doubly-linked list.
+ */
+ struct ControlMessage *prev;
+
+ /**
+ * Function to run after transmission failed/succeeded.
+ */
+ GNUNET_CORE_ControlContinuation cont;
+
+ /**
+ * Closure for 'cont'.
+ */
+ void *cont_cls;
+
+ /**
+ * Transmit handle (if one is associated with this ControlMessage), or NULL.
+ */
+ struct GNUNET_CORE_TransmitHandle *th;
+};
+
+
+
+/**
+ * Context for the core service connection.
+ */
+struct GNUNET_CORE_Handle
+{
/**
* Configuration we're using.
*/
GNUNET_CORE_StartupCallback init;
- /**
- * Function to call whenever we're notified about a peer connecting
- * (pre-connects, no session key exchange yet).
- */
- GNUNET_CORE_ConnectEventHandler pre_connects;
-
/**
* Function to call whenever we're notified about a peer connecting.
*/
*/
GNUNET_CORE_DisconnectEventHandler disconnects;
+ /**
+ * Function to call whenever we're notified about a peer changing status.
+ */
+ GNUNET_CORE_PeerStatusEventHandler status_events;
+
/**
* Function to call whenever we receive an inbound message.
*/
/**
* Handle for our current transmission request.
*/
- struct GNUNET_CLIENT_TransmitHandle *th;
+ struct GNUNET_CLIENT_TransmitHandle *cth;
/**
* Head of doubly-linked list of pending requests.
*/
- struct GNUNET_CORE_TransmitHandle *pending_head;
+ struct ControlMessage *control_pending_head;
/**
* Tail of doubly-linked list of pending requests.
*/
- struct GNUNET_CORE_TransmitHandle *pending_tail;
+ struct ControlMessage *control_pending_tail;
/**
- * Currently submitted request (or NULL)
+ * Head of doubly-linked list of peers that are core-approved
+ * to send their next message.
*/
- struct GNUNET_CORE_TransmitHandle *submitted;
+ struct PeerRecord *ready_peer_head;
/**
- * Currently submitted request based on solicitation (or NULL)
+ * Tail of doubly-linked list of peers that are core-approved
+ * to send their next message.
*/
- struct GNUNET_CORE_TransmitHandle *solicit_transmit_req;
+ struct PeerRecord *ready_peer_tail;
/**
- * Buffer where we store a message for transmission in response
- * to a traffic solicitation (or NULL).
+ * Hash map listing all of the peers that we are currently
+ * connected to.
*/
- char *solicit_buffer;
+ struct GNUNET_CONTAINER_MultiHashMap *peers;
/**
- * How long to wait until we time out the connection attempt?
+ * Identity of this peer.
*/
- struct GNUNET_TIME_Absolute startup_timeout;
+ struct GNUNET_PeerIdentity me;
/**
* ID of reconnect task (if any).
*/
GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
+ /**
+ * Current delay we use for re-trying to connect to core.
+ */
+ struct GNUNET_TIME_Relative retry_backoff;
+
+ /**
+ * Request information ID generator.
+ */
+ uint32_t rim_id_gen;
+
+ /**
+ * Number of messages we are allowed to queue per target.
+ */
+ unsigned int queue_size;
+
/**
* Number of entries in the handlers array.
*/
* requests?
*/
int currently_down;
+
};
struct GNUNET_CORE_TransmitHandle *prev;
/**
- * Corresponding core handle.
+ * Corresponding peer record.
*/
- struct GNUNET_CORE_Handle *ch;
+ struct PeerRecord *peer;
+
+ /**
+ * Corresponding SEND_REQUEST message. Only non-NULL
+ * while SEND_REQUEST message is pending.
+ */
+ struct ControlMessage *cm;
/**
* Function that will be called to get the actual request
*/
void *get_message_cls;
- /**
- * If this entry is for a configuration request, pointer
- * to the information callback; otherwise NULL.
- */
- GNUNET_CORE_PeerConfigurationInfoCallback info;
-
- /**
- * Closure for info.
- */
- void *info_cls;
-
- /**
- * If this entry is for a transmission request, pointer
- * to the notify callback; otherwise NULL.
- */
- GNUNET_CONNECTION_TransmitReadyNotify notify;
-
- /**
- * Closure for notify.
- */
- void *notify_cls;
-
- /**
- * Peer the request is about.
- */
- struct GNUNET_PeerIdentity peer;
-
/**
* Timeout for this handle.
*/
struct GNUNET_TIME_Absolute timeout;
- /**
- * ID of timeout task.
- */
- GNUNET_SCHEDULER_TaskIdentifier timeout_task;
-
/**
* How important is this message?
*/
*/
uint16_t msize;
+ /**
+ * Send message request ID for this request.
+ */
+ uint16_t smr_id;
};
/**
- * Function called when we are ready to transmit our
- * "START" message (or when this operation timed out).
+ * Our current client connection went down. Clean it up
+ * and try to reconnect!
*
- * @param cls closure
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- * @return number of bytes written to buf
+ * @param h our handle to the core service
*/
-static size_t transmit_start (void *cls, size_t size, void *buf);
+static void
+reconnect (struct GNUNET_CORE_Handle *h);
/**
- * Our current client connection went down. Clean it up
- * and try to reconnect!
+ * Task schedule to try to re-connect to core.
*
- * @param h our handle to the core service
+ * @param cls the 'struct GNUNET_CORE_Handle'
+ * @param tc task context
*/
static void
-reconnect (struct GNUNET_CORE_Handle *h)
+reconnect_task (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_CORE_Handle *h = cls;
+
+ h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Connecting to CORE service after delay\n");
+#endif
+ reconnect (h);
+}
+
+
+/**
+ * Notify clients about disconnect and free
+ * the entry for connected peer.
+ *
+ * @param cls the 'struct GNUNET_CORE_Handle*'
+ * @param key the peer identity (not used)
+ * @param value the 'struct PeerRecord' to free.
+ * @return GNUNET_YES (continue)
+ */
+static int
+disconnect_and_free_peer_entry (void *cls,
+ const GNUNET_HashCode *key,
+ void *value)
+{
+ static struct GNUNET_BANDWIDTH_Value32NBO zero;
+ struct GNUNET_CORE_Handle *h = cls;
+ struct GNUNET_CORE_TransmitHandle *th;
+ struct PeerRecord *pr = value;
+ GNUNET_CORE_PeerConfigurationInfoCallback pcic;
+
+ while (NULL != (th = pr->pending_head))
+ {
+ GNUNET_CONTAINER_DLL_remove (pr->pending_head,
+ pr->pending_tail,
+ th);
+ pr->queue_size--;
+ GNUNET_assert (0 ==
+ th->get_message (th->get_message_cls,
+ 0, NULL));
+ GNUNET_free (th);
+ }
+ if (NULL != (pcic = pr->pcic))
+ {
+ pr->pcic = NULL;
+ pcic (pr->pcic_cls,
+ &pr->peer,
+ zero,
+ 0, 0);
+ }
+ if (pr->timeout_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (pr->timeout_task);
+ pr->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ GNUNET_assert (pr->queue_size == 0);
+ if ( (pr->prev != NULL) ||
+ (pr->next != NULL) ||
+ (h->ready_peer_head == pr) )
+ GNUNET_CONTAINER_DLL_remove (h->ready_peer_head,
+ h->ready_peer_tail,
+ pr);
+ if (h->disconnects != NULL)
+ h->disconnects (h->cls,
+ &pr->peer);
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_remove (h->peers,
+ key,
+ pr));
+ GNUNET_assert (pr->pending_head == NULL);
+ GNUNET_assert (pr->pending_tail == NULL);
+ GNUNET_assert (pr->ch = h);
+ GNUNET_assert (pr->queue_size == 0);
+ GNUNET_assert (pr->timeout_task == GNUNET_SCHEDULER_NO_TASK);
+ GNUNET_free (pr);
+ return GNUNET_YES;
+}
+
+
+/**
+ * Close down any existing connection to the CORE service and
+ * try re-establishing it later.
+ *
+ * @param h our handle
+ */
+static void
+reconnect_later (struct GNUNET_CORE_Handle *h)
{
- GNUNET_CLIENT_disconnect (h->client);
+ struct ControlMessage *cm;
+ struct PeerRecord *pr;
+
+ GNUNET_assert (h->reconnect_task == GNUNET_SCHEDULER_NO_TASK);
+ if (h->client != NULL)
+ {
+ GNUNET_CLIENT_disconnect (h->client, GNUNET_NO);
+ h->client = NULL;
+ h->cth = NULL;
+ GNUNET_CONTAINER_multihashmap_iterate (h->peers,
+ &disconnect_and_free_peer_entry,
+ h);
+ }
+ while (NULL != (pr = h->ready_peer_head))
+ GNUNET_CONTAINER_DLL_remove (h->ready_peer_head,
+ h->ready_peer_tail,
+ pr);
h->currently_down = GNUNET_YES;
- h->client = GNUNET_CLIENT_connect (h->sched, "core", h->cfg);
- h->th = GNUNET_CLIENT_notify_transmit_ready (h->client,
- sizeof (struct InitMessage) +
- sizeof (uint16_t) * h->hcnt,
- GNUNET_TIME_UNIT_SECONDS,
- GNUNET_NO,
- &transmit_start, h);
+ h->reconnect_task = GNUNET_SCHEDULER_add_delayed (h->retry_backoff,
+ &reconnect_task,
+ h);
+ while (NULL != (cm = h->control_pending_head))
+ {
+ GNUNET_CONTAINER_DLL_remove (h->control_pending_head,
+ h->control_pending_tail,
+ cm);
+ if (cm->th != NULL)
+ cm->th->cm = NULL;
+ if (cm->cont != NULL)
+ cm->cont (cm->cont_cls, GNUNET_NO);
+ GNUNET_free (cm);
+ }
+ GNUNET_assert (h->control_pending_head == NULL);
+ h->retry_backoff = GNUNET_TIME_relative_min (GNUNET_TIME_UNIT_SECONDS,
+ h->retry_backoff);
+ h->retry_backoff = GNUNET_TIME_relative_multiply (h->retry_backoff, 2);
}
+/**
+ * Check the list of pending requests, send the next
+ * one to the core.
+ *
+ * @param h core handle
+ * @param ignore_currently_down transmit message even if not initialized?
+ */
+static void
+trigger_next_request (struct GNUNET_CORE_Handle *h,
+ int ignore_currently_down);
+
+
/**
* The given request hit its timeout. Remove from the
* doubly-linked list and call the respective continuation.
* @param tc context, can be NULL (!)
*/
static void
-timeout_request (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+transmission_timeout (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc);
+
+
+/**
+ * Send a control message to the peer asking for transmission
+ * of the message in the given peer record.
+ *
+ * @param pr peer to request transmission to
+ */
+static void
+request_next_transmission (struct PeerRecord *pr)
{
- struct GNUNET_CORE_TransmitHandle *th = cls;
+ struct GNUNET_CORE_Handle *h = pr->ch;
+ struct ControlMessage *cm;
+ struct SendMessageRequest *smr;
+ struct GNUNET_CORE_TransmitHandle *th;
+ if (pr->timeout_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (pr->timeout_task);
+ pr->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (NULL == (th = pr->pending_head))
+ {
+ trigger_next_request (h, GNUNET_NO);
+ return;
+ }
+ if (th->cm != NULL)
+ return; /* already done */
+ GNUNET_assert (pr->prev == NULL);
+ GNUNET_assert (pr->next == NULL);
+ pr->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining (th->timeout),
+ &transmission_timeout,
+ pr);
+ cm = GNUNET_malloc (sizeof (struct ControlMessage) +
+ sizeof (struct SendMessageRequest));
+ th->cm = cm;
+ cm->th = th;
+ smr = (struct SendMessageRequest*) &cm[1];
+ smr->header.type = htons (GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST);
+ smr->header.size = htons (sizeof (struct SendMessageRequest));
+ smr->priority = htonl (th->priority);
+ smr->deadline = GNUNET_TIME_absolute_hton (th->timeout);
+ smr->peer = pr->peer;
+ smr->queue_size = htonl (pr->queue_size);
+ smr->size = htons (th->msize);
+ smr->smr_id = htons (th->smr_id = pr->smr_id_gen++);
+ GNUNET_CONTAINER_DLL_insert_after (h->control_pending_head,
+ h->control_pending_tail,
+ h->control_pending_tail,
+ cm);
+#if DEBUG_CORE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Transmission request timed out.\n");
- th->timeout_task = GNUNET_SCHEDULER_NO_TASK;
- GNUNET_assert (0 == th->get_message (th->get_message_cls, 0, NULL));
+ "Adding SEND REQUEST for peer `%s' to message queue\n",
+ GNUNET_i2s (&pr->peer));
+#endif
+ trigger_next_request (h, GNUNET_NO);
}
/**
- * Function called when we are ready to transmit a request from our
- * request list (or when this operation timed out).
+ * The given request hit its timeout. Remove from the
+ * doubly-linked list and call the respective continuation.
*
- * @param cls closure
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- * @return number of bytes written to buf
+ * @param cls the transmit handle of the request that timed out
+ * @param tc context, can be NULL (!)
+ */
+static void
+transmission_timeout (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct PeerRecord *pr = cls;
+ struct GNUNET_CORE_Handle *h = pr->ch;
+ struct GNUNET_CORE_TransmitHandle *th;
+
+ pr->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ th = pr->pending_head;
+ GNUNET_CONTAINER_DLL_remove (pr->pending_head,
+ pr->pending_tail,
+ th);
+ pr->queue_size--;
+ if ( (pr->prev != NULL) ||
+ (pr->next != NULL) ||
+ (pr == h->ready_peer_head) )
+ {
+ /* the request that was 'approved' by core was
+ canceled before it could be transmitted; remove
+ us from the 'ready' list */
+ GNUNET_CONTAINER_DLL_remove (h->ready_peer_head,
+ h->ready_peer_tail,
+ pr);
+ }
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Signalling timeout of request for transmission to CORE service\n");
+#endif
+ GNUNET_assert (0 == th->get_message (th->get_message_cls, 0, NULL));
+ request_next_transmission (pr);
+}
+
+
+/**
+ * Transmit the next message to the core service.
*/
static size_t
-request_start (void *cls, size_t size, void *buf)
+transmit_message (void *cls,
+ size_t size,
+ void *buf)
{
struct GNUNET_CORE_Handle *h = cls;
+ struct ControlMessage *cm;
struct GNUNET_CORE_TransmitHandle *th;
+ struct PeerRecord *pr;
+ struct SendMessage *sm;
+ const struct GNUNET_MessageHeader *hdr;
+ uint16_t msize;
size_t ret;
- h->th = NULL;
- th = h->pending_head;
+ GNUNET_assert (h->reconnect_task == GNUNET_SCHEDULER_NO_TASK);
+ h->cth = NULL;
if (buf == NULL)
{
- timeout_request (th, NULL);
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmission failed, initiating reconnect\n");
+#endif
+ reconnect_later (h);
return 0;
}
- /* create new timeout task (in case core takes too long to respond!) */
- th->timeout_task = GNUNET_SCHEDULER_add_delayed (h->sched,
- GNUNET_TIME_absolute_get_remaining
- (th->timeout),
- &timeout_request, th);
- /* remove th from doubly-linked pending list, move to submitted */
- GNUNET_assert (th->prev == NULL);
- h->pending_head = th->next;
- if (th->next == NULL)
- h->pending_tail = NULL;
- else
- th->next->prev = NULL;
- GNUNET_assert (h->submitted == NULL);
- h->submitted = th;
- GNUNET_assert (size >= th->msize);
- ret = th->get_message (th->get_message_cls, size, buf);
- GNUNET_assert (ret <= size);
- return ret;
+ /* first check for control messages */
+ if (NULL != (cm = h->control_pending_head))
+ {
+ hdr = (const struct GNUNET_MessageHeader*) &cm[1];
+ msize = ntohs (hdr->size);
+ if (size < msize)
+ {
+ trigger_next_request (h, GNUNET_NO);
+ return 0;
+ }
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmitting control message with %u bytes of type %u to core.\n",
+ (unsigned int) msize,
+ (unsigned int) ntohs (hdr->type));
+#endif
+ memcpy (buf, hdr, msize);
+ GNUNET_CONTAINER_DLL_remove (h->control_pending_head,
+ h->control_pending_tail,
+ cm);
+ if (cm->th != NULL)
+ cm->th->cm = NULL;
+ if (NULL != cm->cont)
+ cm->cont (cm->cont_cls, GNUNET_OK);
+ GNUNET_free (cm);
+ trigger_next_request (h, GNUNET_NO);
+ return msize;
+ }
+ /* now check for 'ready' P2P messages */
+ if (NULL != (pr = h->ready_peer_head))
+ {
+ GNUNET_assert (pr->pending_head != NULL);
+ th = pr->pending_head;
+ if (size < th->msize + sizeof (struct SendMessage))
+ {
+ trigger_next_request (h, GNUNET_NO);
+ return 0;
+ }
+ GNUNET_CONTAINER_DLL_remove (h->ready_peer_head,
+ h->ready_peer_tail,
+ pr);
+ GNUNET_CONTAINER_DLL_remove (pr->pending_head,
+ pr->pending_tail,
+ th);
+ pr->queue_size--;
+ if (pr->timeout_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (pr->timeout_task);
+ pr->timeout_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmitting SEND request to `%s' with %u bytes.\n",
+ GNUNET_i2s (&pr->peer),
+ (unsigned int) th->msize);
+#endif
+ sm = (struct SendMessage *) buf;
+ sm->header.type = htons (GNUNET_MESSAGE_TYPE_CORE_SEND);
+ sm->priority = htonl (th->priority);
+ sm->deadline = GNUNET_TIME_absolute_hton (th->timeout);
+ sm->peer = pr->peer;
+ ret = th->get_message (th->get_message_cls,
+ size - sizeof (struct SendMessage),
+ &sm[1]);
+
+ if (0 == ret)
+ {
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Size of clients message to peer %s is 0!\n",
+ GNUNET_i2s(&pr->peer));
+#endif
+ /* client decided to send nothing! */
+ request_next_transmission (pr);
+ return 0;
+ }
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Produced SEND message to core with %u bytes payload\n",
+ (unsigned int) ret);
+#endif
+ GNUNET_assert (ret >= sizeof (struct GNUNET_MessageHeader));
+ if (ret + sizeof (struct SendMessage) >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
+ {
+ GNUNET_break (0);
+ request_next_transmission (pr);
+ return 0;
+ }
+ ret += sizeof (struct SendMessage);
+ sm->header.size = htons (ret);
+ GNUNET_assert (ret <= size);
+ GNUNET_free (th);
+ request_next_transmission (pr);
+ return ret;
+ }
+ return 0;
}
/**
* Check the list of pending requests, send the next
* one to the core.
+ *
+ * @param h core handle
+ * @param ignore_currently_down transmit message even if not initialized?
*/
static void
-trigger_next_request (struct GNUNET_CORE_Handle *h)
+trigger_next_request (struct GNUNET_CORE_Handle *h,
+ int ignore_currently_down)
{
- struct GNUNET_CORE_TransmitHandle *th;
- if (h->currently_down)
- return; /* connection temporarily down */
- if (NULL == (th = h->pending_head))
- return; /* no requests pending */
- GNUNET_assert (NULL == h->th);
- if (GNUNET_SCHEDULER_NO_TASK != th->timeout_task)
- {
- GNUNET_SCHEDULER_cancel (h->sched, th->timeout_task);
- th->timeout_task = GNUNET_SCHEDULER_NO_TASK;
- }
- h->th = GNUNET_CLIENT_notify_transmit_ready (h->client,
- th->msize,
- GNUNET_TIME_absolute_get_remaining
- (th->timeout),
- GNUNET_NO,
- &request_start,
- h);
+ uint16_t msize;
+
+ if ( (GNUNET_YES == h->currently_down) &&
+ (ignore_currently_down == GNUNET_NO) )
+ {
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Core connection down, not processing queue\n");
+#endif
+ return;
+ }
+ if (NULL != h->cth)
+ {
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Request pending, not processing queue\n");
+#endif
+ return;
+ }
+ if (h->control_pending_head != NULL)
+ msize = ntohs (((struct GNUNET_MessageHeader*) &h->control_pending_head[1])->size);
+ else if (h->ready_peer_head != NULL)
+ msize = h->ready_peer_head->pending_head->msize + sizeof (struct SendMessage);
+ else
+ {
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Request queue empty, not processing queue\n");
+#endif
+ return; /* no pending message */
+ }
+ h->cth = GNUNET_CLIENT_notify_transmit_ready (h->client,
+ msize,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_NO,
+ &transmit_message, h);
}
/**
- * Handler for most messages received from the core.
+ * Handler for notification messages received from the core.
*
* @param cls our "struct GNUNET_CORE_Handle"
* @param msg the message received from the core service
*/
static void
-main_handler (void *cls, const struct GNUNET_MessageHeader *msg)
+main_notify_handler (void *cls,
+ const struct GNUNET_MessageHeader *msg)
{
struct GNUNET_CORE_Handle *h = cls;
- unsigned int hpos;
+ const struct InitReplyMessage *m;
const struct ConnectNotifyMessage *cnm;
+ const struct DisconnectNotifyMessage *dnm;
const struct NotifyTrafficMessage *ntm;
- const struct ConfigurationInfoMessage *cim;
const struct GNUNET_MessageHeader *em;
+ const struct ConfigurationInfoMessage *cim;
+ const struct PeerStatusNotifyMessage *psnm;
+ const struct SendMessageReady *smr;
+ const struct GNUNET_CORE_MessageHandler *mh;
+ GNUNET_CORE_StartupCallback init;
+ GNUNET_CORE_PeerConfigurationInfoCallback pcic;
+ struct PeerRecord *pr;
+ struct GNUNET_CORE_TransmitHandle *th;
+ unsigned int hpos;
+ int trigger;
uint16_t msize;
uint16_t et;
- const struct GNUNET_CORE_MessageHandler *mh;
+ uint32_t ats_count;
if (msg == NULL)
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_
("Client was disconnected from core service, trying to reconnect.\n"));
- reconnect (h);
+ reconnect_later (h);
return;
}
msize = ntohs (msg->size);
#endif
switch (ntohs (msg->type))
{
- case GNUNET_MESSAGE_TYPE_CORE_NOTIFY_PRE_CONNECT:
- if (NULL == h->pre_connects)
+ case GNUNET_MESSAGE_TYPE_CORE_INIT_REPLY:
+ if (ntohs (msg->size) != sizeof (struct InitReplyMessage))
+ {
+ GNUNET_break (0);
+ reconnect_later (h);
+ return;
+ }
+ m = (const struct InitReplyMessage *) msg;
+ GNUNET_break (0 == ntohl (m->reserved));
+ /* start our message processing loop */
+ if (GNUNET_YES == h->currently_down)
+ {
+ h->currently_down = GNUNET_NO;
+ trigger_next_request (h, GNUNET_NO);
+ }
+ h->retry_backoff = GNUNET_TIME_UNIT_MILLISECONDS;
+ GNUNET_CRYPTO_hash (&m->publicKey,
+ sizeof (struct
+ GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
+ &h->me.hashPubKey);
+ if (NULL != (init = h->init))
+ {
+ /* mark so we don't call init on reconnect */
+ h->init = NULL;
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Connected to core service of peer `%s'.\n",
+ GNUNET_i2s (&h->me));
+#endif
+ init (h->cls, h, &h->me, &m->publicKey);
+ }
+ else
+ {
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Successfully reconnected to core service.\n");
+#endif
+ }
+ /* fake 'connect to self' */
+ pr = GNUNET_CONTAINER_multihashmap_get (h->peers,
+ &h->me.hashPubKey);
+ GNUNET_assert (pr == NULL);
+ pr = GNUNET_malloc (sizeof (struct PeerRecord));
+ pr->peer = h->me;
+ pr->ch = h;
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_put (h->peers,
+ &h->me.hashPubKey,
+ pr,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
+ if (NULL != h->connects)
+ h->connects (h->cls,
+ &h->me,
+ NULL);
+ break;
+ case GNUNET_MESSAGE_TYPE_CORE_NOTIFY_CONNECT:
+ if (msize < sizeof (struct ConnectNotifyMessage))
{
GNUNET_break (0);
- break;
+ reconnect_later (h);
+ return;
}
- if (msize != sizeof (struct ConnectNotifyMessage))
+ cnm = (const struct ConnectNotifyMessage *) msg;
+ ats_count = ntohl (cnm->ats_count);
+ if ( (msize != sizeof (struct ConnectNotifyMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information)) ||
+ (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR != ntohl ((&cnm->ats)[ats_count].type)) )
{
GNUNET_break (0);
- break;
+ reconnect_later (h);
+ return;
}
- cnm = (const struct ConnectNotifyMessage *) msg;
- h->pre_connects (h->cls,
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received notification about connection from `%s'.\n",
+ GNUNET_i2s (&cnm->peer));
+#endif
+ if (0 == memcmp (&h->me,
&cnm->peer,
- GNUNET_TIME_relative_ntoh (cnm->latency),
- ntohl (cnm->distance));
+ sizeof (struct GNUNET_PeerIdentity)))
+ {
+ /* connect to self!? */
+ GNUNET_break (0);
+ return;
+ }
+ pr = GNUNET_CONTAINER_multihashmap_get (h->peers,
+ &cnm->peer.hashPubKey);
+ if (pr != NULL)
+ {
+ GNUNET_break (0);
+ reconnect_later (h);
+ return;
+ }
+ pr = GNUNET_malloc (sizeof (struct PeerRecord));
+ pr->peer = cnm->peer;
+ pr->ch = h;
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_put (h->peers,
+ &cnm->peer.hashPubKey,
+ pr,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
+ if (NULL != h->connects)
+ h->connects (h->cls,
+ &cnm->peer,
+ &cnm->ats);
break;
- case GNUNET_MESSAGE_TYPE_CORE_NOTIFY_CONNECT:
- if (NULL == h->connects)
+ case GNUNET_MESSAGE_TYPE_CORE_NOTIFY_DISCONNECT:
+ if (msize != sizeof (struct DisconnectNotifyMessage))
{
GNUNET_break (0);
- break;
+ reconnect_later (h);
+ return;
}
- if (msize != sizeof (struct ConnectNotifyMessage))
+ dnm = (const struct DisconnectNotifyMessage *) msg;
+ if (0 == memcmp (&h->me,
+ &dnm->peer,
+ sizeof (struct GNUNET_PeerIdentity)))
+ {
+ /* connection to self!? */
+ GNUNET_break (0);
+ return;
+ }
+ GNUNET_break (0 == ntohl (dnm->reserved));
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received notification about disconnect from `%s'.\n",
+ GNUNET_i2s (&dnm->peer));
+#endif
+ pr = GNUNET_CONTAINER_multihashmap_get (h->peers,
+ &dnm->peer.hashPubKey);
+ if (pr == NULL)
+ {
+ GNUNET_break (0);
+ reconnect_later (h);
+ return;
+ }
+ trigger = ( (pr->prev != NULL) ||
+ (pr->next != NULL) ||
+ (h->ready_peer_head == pr) );
+ disconnect_and_free_peer_entry (h, &dnm->peer.hashPubKey, pr);
+ if (trigger)
+ trigger_next_request (h, GNUNET_NO);
+ break;
+ case GNUNET_MESSAGE_TYPE_CORE_NOTIFY_STATUS_CHANGE:
+ if (NULL == h->status_events)
{
GNUNET_break (0);
- break;
}
- cnm = (const struct ConnectNotifyMessage *) msg;
- h->connects (h->cls,
- &cnm->peer,
- GNUNET_TIME_relative_ntoh (cnm->latency),
- ntohl (cnm->distance));
- break;
- case GNUNET_MESSAGE_TYPE_CORE_NOTIFY_DISCONNECT:
- if (NULL == h->disconnects)
+ if (msize < sizeof (struct PeerStatusNotifyMessage))
{
GNUNET_break (0);
- break;
+ reconnect_later (h);
+ return;
}
- if (msize != sizeof (struct ConnectNotifyMessage))
+ psnm = (const struct PeerStatusNotifyMessage *) msg;
+ if (0 == memcmp (&h->me,
+ &psnm->peer,
+ sizeof (struct GNUNET_PeerIdentity)))
+ {
+ /* self-change!? */
+ GNUNET_break (0);
+ return;
+ }
+ ats_count = ntohl (psnm->ats_count);
+ if ( (msize != sizeof (struct PeerStatusNotifyMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information)) ||
+ (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR != ntohl ((&psnm->ats)[ats_count].type)) )
{
GNUNET_break (0);
- break;
+ reconnect_later (h);
+ return;
}
- cnm = (const struct ConnectNotifyMessage *) msg;
- h->disconnects (h->cls,
- &cnm->peer);
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received notification about status change by `%s'.\n",
+ GNUNET_i2s (&psnm->peer));
+#endif
+ pr = GNUNET_CONTAINER_multihashmap_get (h->peers,
+ &psnm->peer.hashPubKey);
+ if (pr == NULL)
+ {
+ GNUNET_break (0);
+ reconnect_later (h);
+ return;
+ }
+ h->status_events (h->cls,
+ &psnm->peer,
+ psnm->bandwidth_in,
+ psnm->bandwidth_out,
+ GNUNET_TIME_absolute_ntoh (psnm->timeout),
+ &psnm->ats);
break;
case GNUNET_MESSAGE_TYPE_CORE_NOTIFY_INBOUND:
- if (msize <
- sizeof (struct NotifyTrafficMessage) +
- sizeof (struct GNUNET_MessageHeader))
+ if (msize < sizeof (struct NotifyTrafficMessage))
{
GNUNET_break (0);
- break;
+ reconnect_later (h);
+ return;
}
ntm = (const struct NotifyTrafficMessage *) msg;
- em = (const struct GNUNET_MessageHeader *) &ntm[1];
+
+ ats_count = ntohl (ntm->ats_count);
+ if ( (msize < sizeof (struct NotifyTrafficMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information)
+ + sizeof (struct GNUNET_MessageHeader)) ||
+ (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR != ntohl ((&ntm->ats)[ats_count].type)) )
+ {
+ GNUNET_break (0);
+ reconnect_later (h);
+ return;
+ }
+ em = (const struct GNUNET_MessageHeader *) &(&ntm->ats)[ats_count+1];
#if DEBUG_CORE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received message of type %u from peer `%4s'\n",
- ntohs (em->type), GNUNET_i2s (&ntm->peer));
+ "Received message of type %u and size %u from peer `%4s'\n",
+ ntohs (em->type),
+ ntohs (em->size),
+ GNUNET_i2s (&ntm->peer));
#endif
+ pr = GNUNET_CONTAINER_multihashmap_get (h->peers,
+ &ntm->peer.hashPubKey);
+ if (pr == NULL)
+ {
+ GNUNET_break (0);
+ reconnect_later (h);
+ return;
+ }
if ((GNUNET_NO == h->inbound_hdr_only) &&
- (msize != ntohs (em->size) + sizeof (struct NotifyTrafficMessage)))
+ (msize != ntohs (em->size) + sizeof (struct NotifyTrafficMessage) +
+ + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information)) )
{
GNUNET_break (0);
- break;
+ reconnect_later (h);
+ return;
}
et = ntohs (em->type);
for (hpos = 0; hpos < h->hcnt; hpos++)
}
if (GNUNET_OK !=
h->handlers[hpos].callback (h->cls, &ntm->peer, em,
- GNUNET_TIME_relative_ntoh (ntm->latency),
- ntohl (ntm->distance)))
+ &ntm->ats))
{
- /* error in processing, disconnect ! */
- reconnect (h);
- return;
+ /* error in processing, do not process other messages! */
+ break;
}
}
if (NULL != h->inbound_notify)
h->inbound_notify (h->cls, &ntm->peer, em,
- GNUNET_TIME_relative_ntoh (ntm->latency),
- ntohl (ntm->distance));
+ &ntm->ats);
break;
case GNUNET_MESSAGE_TYPE_CORE_NOTIFY_OUTBOUND:
- if (msize <
- sizeof (struct NotifyTrafficMessage) +
- sizeof (struct GNUNET_MessageHeader))
+ if (msize < sizeof (struct NotifyTrafficMessage))
{
GNUNET_break (0);
- break;
+ reconnect_later (h);
+ return;
}
ntm = (const struct NotifyTrafficMessage *) msg;
- em = (const struct GNUNET_MessageHeader *) &ntm[1];
+ if (0 == memcmp (&h->me,
+ &ntm->peer,
+ sizeof (struct GNUNET_PeerIdentity)))
+ {
+ /* self-change!? */
+ GNUNET_break (0);
+ return;
+ }
+ ats_count = ntohl (ntm->ats_count);
+ if ( (msize < sizeof (struct NotifyTrafficMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information)
+ + sizeof (struct GNUNET_MessageHeader)) ||
+ (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR != ntohl ((&ntm->ats)[ats_count].type)) )
+ {
+ GNUNET_break (0);
+ reconnect_later (h);
+ return;
+ }
+ em = (const struct GNUNET_MessageHeader *) &(&ntm->ats)[ats_count+1];
+ pr = GNUNET_CONTAINER_multihashmap_get (h->peers,
+ &ntm->peer.hashPubKey);
+ if (pr == NULL)
+ {
+ GNUNET_break (0);
+ reconnect_later (h);
+ return;
+ }
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received notification about transmission to `%s'.\n",
+ GNUNET_i2s (&ntm->peer));
+#endif
if ((GNUNET_NO == h->outbound_hdr_only) &&
- (msize != ntohs (em->size) + sizeof (struct NotifyTrafficMessage)))
+ (msize != ntohs (em->size) + sizeof (struct NotifyTrafficMessage)
+ + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information)) )
{
GNUNET_break (0);
- break;
+ reconnect_later (h);
+ return;
}
if (NULL == h->outbound_notify)
{
break;
}
h->outbound_notify (h->cls, &ntm->peer, em,
- GNUNET_TIME_relative_ntoh (ntm->latency),
- ntohl (ntm->distance));
+ &ntm->ats);
break;
- case GNUNET_MESSAGE_TYPE_CORE_CONFIGURATION_INFO:
- if (msize != sizeof (struct ConfigurationInfoMessage))
+ case GNUNET_MESSAGE_TYPE_CORE_SEND_READY:
+ if (msize != sizeof (struct SendMessageReady))
{
GNUNET_break (0);
- break;
+ reconnect_later (h);
+ return;
+ }
+ smr = (const struct SendMessageReady *) msg;
+ pr = GNUNET_CONTAINER_multihashmap_get (h->peers,
+ &smr->peer.hashPubKey);
+ if (pr == NULL)
+ {
+ GNUNET_break (0);
+ reconnect_later (h);
+ return;
+ }
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received notification about transmission readiness to `%s'.\n",
+ GNUNET_i2s (&smr->peer));
+#endif
+ if (pr->pending_head == NULL)
+ {
+ /* request must have been cancelled between the original request
+ and the response from core, ignore core's readiness */
+ return;
}
- if (NULL == h->submitted)
- break;
- cim = (const struct ConfigurationInfoMessage *) msg;
-
- /* process configuration data */
- if (h->submitted->info != NULL)
- h->submitted->info (h->submitted->info_cls,
- &h->submitted->peer,
- ntohl (cim->bpm_in),
- ntohl (cim->bpm_out),
- (int) ntohl (cim->reserved_amount),
- cim->preference);
- /* done, clean up! */
- GNUNET_CORE_notify_transmit_ready_cancel (h->submitted); // HUH?
- trigger_next_request (h);
+
+ th = pr->pending_head;
+ if (ntohs (smr->smr_id) != th->smr_id)
+ {
+ /* READY message is for expired or cancelled message,
+ ignore! (we should have already sent another request) */
+ break;
+ }
+ if ( (pr->prev != NULL) ||
+ (pr->next != NULL) ||
+ (h->ready_peer_head == pr) )
+ {
+ /* we should not already be on the ready list... */
+ GNUNET_break (0);
+ reconnect_later (h);
+ return;
+ }
+ GNUNET_CONTAINER_DLL_insert (h->ready_peer_head,
+ h->ready_peer_tail,
+ pr);
+ trigger_next_request (h, GNUNET_NO);
break;
- default:
- GNUNET_break (0);
+ case GNUNET_MESSAGE_TYPE_CORE_CONFIGURATION_INFO:
+ if (ntohs (msg->size) != sizeof (struct ConfigurationInfoMessage))
+ {
+ GNUNET_break (0);
+ reconnect_later (h);
+ return;
+ }
+ cim = (const struct ConfigurationInfoMessage*) msg;
+ if (0 == memcmp (&h->me,
+ &cim->peer,
+ sizeof (struct GNUNET_PeerIdentity)))
+ {
+ /* self-change!? */
+ GNUNET_break (0);
+ return;
+ }
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received notification about configuration update for `%s'.\n",
+ GNUNET_i2s (&cim->peer));
+#endif
+ pr = GNUNET_CONTAINER_multihashmap_get (h->peers,
+ &cim->peer.hashPubKey);
+ if (pr == NULL)
+ {
+ GNUNET_break (0);
+ reconnect_later (h);
+ return;
+ }
+ if (pr->rim_id != ntohl (cim->rim_id))
+ {
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Reservation ID mismatch in notification...\n");
+#endif
+ break;
+ }
+ pcic = pr->pcic;
+ pr->pcic = NULL;
+ if (pcic != NULL)
+ pcic (pr->pcic_cls,
+ &pr->peer,
+ cim->bw_out,
+ ntohl (cim->reserved_amount),
+ GNUNET_ntohll (cim->preference));
break;
+ default:
+ reconnect_later (h);
+ return;
}
GNUNET_CLIENT_receive (h->client,
- &main_handler, h, GNUNET_TIME_UNIT_FOREVER_REL);
+ &main_notify_handler, h,
+ GNUNET_TIME_UNIT_FOREVER_REL);
}
-
-/**
- * Function called when we are ready to transmit our
- * "START" message (or when this operation timed out).
- *
- * @param cls closure
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- * @return number of bytes written to buf
- */
-static size_t transmit_start (void *cls, size_t size, void *buf);
-
-
/**
- * Function called on the first message received from
- * the service (contains our public key, etc.).
- * Should trigger calling the init callback
- * and then start our regular message processing.
+ * Task executed once we are done transmitting the INIT message.
+ * Starts our 'receive' loop.
*
- * @param cls closure
- * @param msg message received, NULL on timeout or fatal error
+ * @param cls the 'struct GNUNET_CORE_Handle'
+ * @param success were we successful
*/
static void
-init_reply_handler (void *cls, const struct GNUNET_MessageHeader *msg)
+init_done_task (void *cls,
+ int success)
{
struct GNUNET_CORE_Handle *h = cls;
- const struct InitReplyMessage *m;
- GNUNET_CORE_StartupCallback init;
- struct GNUNET_PeerIdentity my_identity;
- if ((msg == NULL) ||
- (ntohs (msg->size) != sizeof (struct InitReplyMessage)) ||
- (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_CORE_INIT_REPLY))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _
- ("Error connecting to core service (failed to receive `%s' message).\n"),
- "INIT_REPLY");
- GNUNET_break (msg == NULL);
- transmit_start (h, 0, NULL);
- return;
- }
- m = (const struct InitReplyMessage *) msg;
- /* start our message processing loop */
-#if DEBUG_CORE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- _
- ("Successfully connected to core service, starting processing loop.\n"));
-#endif
- h->currently_down = GNUNET_NO;
- trigger_next_request (h);
- GNUNET_CLIENT_receive (h->client,
- &main_handler, h, GNUNET_TIME_UNIT_FOREVER_REL);
- if (NULL != (init = h->init))
+ if (success == GNUNET_SYSERR)
+ return; /* shutdown */
+ if (success == GNUNET_NO)
{
- /* mark so we don't call init on reconnect */
- h->init = NULL;
#if DEBUG_CORE
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("Successfully connected to core service.\n"));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Failed to exchange INIT with core, retrying\n");
#endif
- GNUNET_CRYPTO_hash (&m->publicKey,
- sizeof (struct
- GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
- &my_identity.hashPubKey);
- init (h->cls, h, &my_identity, &m->publicKey);
+ if (h->reconnect_task == GNUNET_SCHEDULER_NO_TASK)
+ reconnect_later (h);
+ return;
}
-}
-
-
-static void
-reconnect_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_CORE_Handle *h = cls;
- h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
- reconnect (h);
+ GNUNET_CLIENT_receive (h->client,
+ &main_notify_handler,
+ h,
+ GNUNET_TIME_UNIT_FOREVER_REL);
}
/**
- * Function called when we are ready to transmit our
- * "START" message (or when this operation timed out).
+ * Our current client connection went down. Clean it up
+ * and try to reconnect!
*
- * @param cls closure
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- * @return number of bytes written to buf
+ * @param h our handle to the core service
*/
-static size_t
-transmit_start (void *cls, size_t size, void *buf)
+static void
+reconnect (struct GNUNET_CORE_Handle *h)
{
- struct GNUNET_CORE_Handle *h = cls;
+ struct ControlMessage *cm;
struct InitMessage *init;
- uint16_t *ts;
- uint16_t msize;
uint32_t opt;
+ uint16_t msize;
+ uint16_t *ts;
unsigned int hpos;
- struct GNUNET_TIME_Relative delay;
- h->th = NULL;
- if (size == 0)
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Reconnecting to CORE service\n");
+#endif
+ GNUNET_assert (h->client == NULL);
+ GNUNET_assert (h->currently_down == GNUNET_YES);
+ h->client = GNUNET_CLIENT_connect ("core", h->cfg);
+ if (h->client == NULL)
{
- if ((h->init == NULL) ||
- (GNUNET_TIME_absolute_get ().value < h->startup_timeout.value))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("Failed to connect to core service, retrying.\n"));
- delay = GNUNET_TIME_absolute_get_remaining (h->startup_timeout);
- if ((h->init == NULL) || (delay.value > 1000))
- delay = GNUNET_TIME_UNIT_SECONDS;
- if (h->init == NULL)
- h->startup_timeout =
- GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_MINUTES);
- h->reconnect_task =
- GNUNET_SCHEDULER_add_delayed (h->sched,
- delay, &reconnect_task, h);
- return 0;
- }
- /* timeout on initial connect */
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to connect to core service, giving up.\n"));
- h->init (h->cls, NULL, NULL, NULL);
- GNUNET_CORE_disconnect (h);
- return 0;
+ reconnect_later (h);
+ return;
}
msize = h->hcnt * sizeof (uint16_t) + sizeof (struct InitMessage);
- GNUNET_assert (size >= msize);
- init = buf;
+ cm = GNUNET_malloc (sizeof (struct ControlMessage) +
+ msize);
+ cm->cont = &init_done_task;
+ cm->cont_cls = h;
+ init = (struct InitMessage*) &cm[1];
init->header.type = htons (GNUNET_MESSAGE_TYPE_CORE_INIT);
init->header.size = htons (msize);
- opt = GNUNET_CORE_OPTION_NOTHING;
- if (h->pre_connects != NULL)
- opt |= GNUNET_CORE_OPTION_SEND_PRE_CONNECT;
- if (h->connects != NULL)
- opt |= GNUNET_CORE_OPTION_SEND_CONNECT;
- if (h->disconnects != NULL)
- opt |= GNUNET_CORE_OPTION_SEND_DISCONNECT;
+ opt = GNUNET_CORE_OPTION_SEND_CONNECT | GNUNET_CORE_OPTION_SEND_DISCONNECT;
+ if (h->status_events != NULL)
+ opt |= GNUNET_CORE_OPTION_SEND_STATUS_CHANGE;
if (h->inbound_notify != NULL)
{
if (h->inbound_hdr_only)
opt |= GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND;
}
init->options = htonl (opt);
- ts = (uint16_t *) & init[1];
+ ts = (uint16_t *) &init[1];
for (hpos = 0; hpos < h->hcnt; hpos++)
ts[hpos] = htons (h->handlers[hpos].type);
- GNUNET_CLIENT_receive (h->client,
- &init_reply_handler,
- h,
- GNUNET_TIME_absolute_get_remaining
- (h->startup_timeout));
- return sizeof (struct InitMessage) + h->hcnt * sizeof (uint16_t);
+ GNUNET_CONTAINER_DLL_insert (h->control_pending_head,
+ h->control_pending_tail,
+ cm);
+ trigger_next_request (h, GNUNET_YES);
}
+
/**
* Connect to the core service. Note that the connection may
* complete (or fail) asynchronously.
*
- * @param sched scheduler to use
* @param cfg configuration to use
- * @param timeout after how long should we give up trying to connect to the core service?
+ * @param queue_size size of the per-peer message queue
* @param cls closure for the various callbacks that follow (including handlers in the handlers array)
* @param init callback to call on timeout or once we have successfully
* connected to the core service; note that timeout is only meaningful if init is not NULL
- * @param pre_connects function to call on peer pre-connect (no session key yet), can be NULL
* @param connects function to call on peer connect, can be NULL
* @param disconnects function to call on peer disconnect / timeout, can be NULL
+ * @param status_events function to call on changes to peer connection status, can be NULL
* @param inbound_notify function to call for all inbound messages, can be NULL
* @param inbound_hdr_only set to GNUNET_YES if inbound_notify will only read the
* GNUNET_MessageHeader and hence we do not need to give it the full message;
* NULL on error (in this case, init is never called)
*/
struct GNUNET_CORE_Handle *
-GNUNET_CORE_connect (struct GNUNET_SCHEDULER_Handle *sched,
- const struct GNUNET_CONFIGURATION_Handle *cfg,
- struct GNUNET_TIME_Relative timeout,
+GNUNET_CORE_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ unsigned int queue_size,
void *cls,
GNUNET_CORE_StartupCallback init,
- GNUNET_CORE_ConnectEventHandler pre_connects,
GNUNET_CORE_ConnectEventHandler connects,
GNUNET_CORE_DisconnectEventHandler disconnects,
+ GNUNET_CORE_PeerStatusEventHandler status_events,
GNUNET_CORE_MessageCallback inbound_notify,
int inbound_hdr_only,
GNUNET_CORE_MessageCallback outbound_notify,
struct GNUNET_CORE_Handle *h;
h = GNUNET_malloc (sizeof (struct GNUNET_CORE_Handle));
- h->sched = sched;
h->cfg = cfg;
+ h->queue_size = queue_size;
h->cls = cls;
h->init = init;
- h->pre_connects = pre_connects;
h->connects = connects;
h->disconnects = disconnects;
+ h->status_events = status_events;
h->inbound_notify = inbound_notify;
h->outbound_notify = outbound_notify;
h->inbound_hdr_only = inbound_hdr_only;
h->outbound_hdr_only = outbound_hdr_only;
h->handlers = handlers;
- h->client = GNUNET_CLIENT_connect (sched, "core", cfg);
- if (h->client == NULL)
- {
- GNUNET_free (h);
- return NULL;
- }
- h->startup_timeout = GNUNET_TIME_relative_to_absolute (timeout);
h->hcnt = 0;
+ h->currently_down = GNUNET_YES;
+ h->peers = GNUNET_CONTAINER_multihashmap_create (128);
+ h->retry_backoff = GNUNET_TIME_UNIT_MILLISECONDS;
while (handlers[h->hcnt].callback != NULL)
h->hcnt++;
GNUNET_assert (h->hcnt <
sizeof (struct InitMessage)) / sizeof (uint16_t));
#if DEBUG_CORE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Trying to connect to core service in next %llu ms.\n",
- timeout.value);
+ "Connecting to CORE service\n");
#endif
- h->th =
- GNUNET_CLIENT_notify_transmit_ready (h->client,
- sizeof (struct InitMessage) +
- sizeof (uint16_t) * h->hcnt, timeout,
- GNUNET_YES,
- &transmit_start, h);
+ reconnect (h);
return h;
}
/**
- * Disconnect from the core service.
+ * Disconnect from the core service. This function can only
+ * be called *after* all pending 'GNUNET_CORE_notify_transmit_ready'
+ * requests have been explicitly canceled.
*
* @param handle connection to core to disconnect
*/
void
GNUNET_CORE_disconnect (struct GNUNET_CORE_Handle *handle)
{
- if (handle->th != NULL)
- GNUNET_CLIENT_notify_transmit_ready_cancel (handle->th);
- if (handle->solicit_transmit_req != NULL)
- GNUNET_CORE_notify_transmit_ready_cancel (handle->solicit_transmit_req);
- if (handle->reconnect_task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel (handle->sched, handle->reconnect_task);
- GNUNET_CLIENT_disconnect (handle->client);
- GNUNET_free_non_null (handle->solicit_buffer);
- GNUNET_free (handle);
-}
-
-
-/**
- * Build the message requesting data transmission.
- */
-static size_t
-produce_send (void *cls, size_t size, void *buf)
-{
- struct GNUNET_CORE_TransmitHandle *th = cls;
- struct GNUNET_CORE_Handle *h;
- struct SendMessage *sm;
- size_t dt;
- GNUNET_CONNECTION_TransmitReadyNotify notify;
- void *notify_cls;
-
- h = th->ch;
- if (buf == NULL)
- {
- /* timeout or error */
-#if DEBUG_CORE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "P2P transmission request for `%4s' timed out.\n",
- GNUNET_i2s(&th->peer));
-#endif
- GNUNET_assert (0 == th->notify (th->notify_cls, 0, NULL));
- GNUNET_CORE_notify_transmit_ready_cancel (th);
- trigger_next_request (h);
- return 0;
- }
+ struct ControlMessage *cm;
+
#if DEBUG_CORE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Preparing for P2P transmission to `%4s'.\n",
- GNUNET_i2s(&th->peer));
+ "Disconnecting from CORE service\n");
#endif
- GNUNET_assert (th->timeout_task != GNUNET_SCHEDULER_NO_TASK);
- sm = (struct SendMessage *) buf;
- sm->header.type = htons (GNUNET_MESSAGE_TYPE_CORE_SEND);
- sm->priority = htonl (th->priority);
- sm->deadline = GNUNET_TIME_absolute_hton (th->timeout);
- sm->peer = th->peer;
- notify = th->notify;
- notify_cls = th->notify_cls;
- GNUNET_CORE_notify_transmit_ready_cancel (th);
- trigger_next_request (h);
- GNUNET_assert (size >= sizeof (struct SendMessage));
- dt = notify (notify_cls, size - sizeof (struct SendMessage), &sm[1]);
- if (0 == dt)
- {
- /* client decided to send nothing! */
- return 0;
+ if (handle->cth != NULL)
+ {
+ GNUNET_CLIENT_notify_transmit_ready_cancel (handle->cth);
+ handle->cth = NULL;
+ }
+ if (handle->client != NULL)
+ {
+ GNUNET_CLIENT_disconnect (handle->client, GNUNET_NO);
+ handle->client = NULL;
+ }
+ while (NULL != (cm = handle->control_pending_head))
+ {
+ GNUNET_CONTAINER_DLL_remove (handle->control_pending_head,
+ handle->control_pending_tail,
+ cm);
+ if (cm->th != NULL)
+ cm->th->cm = NULL;
+ if (cm->cont != NULL)
+ cm->cont (cm->cont_cls, GNUNET_SYSERR);
+ GNUNET_free (cm);
}
- GNUNET_assert (dt >= sizeof (struct GNUNET_MessageHeader));
- sm->header.size = htons (dt + sizeof (struct SendMessage));
- GNUNET_assert (dt + sizeof (struct SendMessage) < size);
- return dt + sizeof (struct SendMessage);
+ if (handle->reconnect_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (handle->reconnect_task);
+ handle->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ GNUNET_CONTAINER_multihashmap_iterate (handle->peers,
+ &disconnect_and_free_peer_entry,
+ handle);
+ GNUNET_CONTAINER_multihashmap_destroy (handle->peers);
+ GNUNET_break (handle->ready_peer_head == NULL);
+ GNUNET_free (handle);
}
/**
* Ask the core to call "notify" once it is ready to transmit the
- * given number of bytes to the specified "target". If we are not yet
- * connected to the specified peer, a call to this function will cause
- * us to try to establish a connection.
+ * given number of bytes to the specified "target". Must only be
+ * called after a connection to the respective peer has been
+ * established (and the client has been informed about this).
*
* @param handle connection to core service
* @param priority how important is the message?
*/
struct GNUNET_CORE_TransmitHandle *
GNUNET_CORE_notify_transmit_ready (struct GNUNET_CORE_Handle *handle,
- unsigned int priority,
+ uint32_t priority,
struct GNUNET_TIME_Relative maxdelay,
const struct GNUNET_PeerIdentity *target,
size_t notify_size,
GNUNET_CONNECTION_TransmitReadyNotify notify,
void *notify_cls)
{
+ struct PeerRecord *pr;
struct GNUNET_CORE_TransmitHandle *th;
+ struct GNUNET_CORE_TransmitHandle *pos;
+ struct GNUNET_CORE_TransmitHandle *prev;
+ struct GNUNET_CORE_TransmitHandle *minp;
+ pr = GNUNET_CONTAINER_multihashmap_get (handle->peers,
+ &target->hashPubKey);
+ if (NULL == pr)
+ {
+ /* attempt to send to peer that is not connected */
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
+ "Attempting to send to peer `%s' from peer `%s', but not connected!\n",
+ GNUNET_i2s(target), GNUNET_h2s(&handle->me.hashPubKey));
+ GNUNET_break (0);
+ return NULL;
+ }
GNUNET_assert (notify_size + sizeof (struct SendMessage) <
GNUNET_SERVER_MAX_MESSAGE_SIZE);
th = GNUNET_malloc (sizeof (struct GNUNET_CORE_TransmitHandle));
- th->ch = handle;
- /* append to list */
- th->prev = handle->pending_tail;
- if (handle->pending_tail == NULL)
- handle->pending_head = th;
- else
- handle->pending_tail->next = th;
- th->get_message = &produce_send;
- th->get_message_cls = th;
- th->notify = notify;
- th->notify_cls = notify_cls;
- th->peer = *target;
+ th->peer = pr;
+ GNUNET_assert(NULL != notify);
+ th->get_message = notify;
+ th->get_message_cls = notify_cls;
th->timeout = GNUNET_TIME_relative_to_absolute (maxdelay);
- th->timeout_task = GNUNET_SCHEDULER_add_delayed (handle->sched,
- maxdelay,
- &timeout_request, th);
th->priority = priority;
- th->msize = sizeof (struct SendMessage) + notify_size;
+ th->msize = notify_size;
+ /* bound queue size */
+ if (pr->queue_size == handle->queue_size)
+ {
+ /* find lowest-priority entry, but skip the head of the list */
+ minp = pr->pending_head->next;
+ prev = minp;
+ while (prev != NULL)
+ {
+ if (prev->priority < minp->priority)
+ minp = prev;
+ prev = prev->next;
+ }
+ if (minp == NULL)
+ {
+ GNUNET_break (handle->queue_size != 0);
+ GNUNET_break (pr->queue_size == 0);
+ GNUNET_free(th);
+ return NULL;
+ }
+ if (priority <= minp->priority)
+ {
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Dropping transmission request: priority too low\n");
+#endif
+ return NULL; /* priority too low */
+ }
+ GNUNET_CONTAINER_DLL_remove (pr->pending_head,
+ pr->pending_tail,
+ minp);
+ pr->queue_size--;
+ GNUNET_assert (0 ==
+ minp->get_message (minp->get_message_cls,
+ 0, NULL));
+ GNUNET_free (minp);
+ }
+
+ /* Order entries by deadline, but SKIP 'HEAD' if
+ we're in the 'ready_peer_*' DLL */
+ pos = pr->pending_head;
+ if ( (pr->prev != NULL) ||
+ (pr->next != NULL) ||
+ (pr == handle->ready_peer_head) )
+ {
+ GNUNET_assert (pos != NULL);
+ pos = pos->next; /* skip head */
+ }
+
+ /* insertion sort */
+ prev = pos;
+ while ( (pos != NULL) &&
+ (pos->timeout.abs_value < th->timeout.abs_value) )
+ {
+ prev = pos;
+ pos = pos->next;
+ }
+ GNUNET_CONTAINER_DLL_insert_after (pr->pending_head,
+ pr->pending_tail,
+ prev,
+ th);
+ pr->queue_size++;
/* was the request queue previously empty? */
- if ( (handle->pending_head == th) &&
- (handle->th == NULL) )
- trigger_next_request (handle);
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmission request added to queue\n");
+#endif
+ if (pr->pending_head == th)
+ request_next_transmission (pr);
return th;
}
/**
* Cancel the specified transmission-ready notification.
*
- * @param h handle that was returned by "notify_transmit_ready".
+ * @param th handle that was returned by "notify_transmit_ready".
*/
void
GNUNET_CORE_notify_transmit_ready_cancel (struct GNUNET_CORE_TransmitHandle
- *h)
+ *th)
+{
+ struct PeerRecord *pr = th->peer;
+ struct GNUNET_CORE_Handle *h = pr->ch;
+ int was_head;
+
+ was_head = (pr->pending_head == th);
+ GNUNET_CONTAINER_DLL_remove (pr->pending_head,
+ pr->pending_tail,
+ th);
+ pr->queue_size--;
+ if (th->cm != NULL)
+ {
+ /* we're currently in the control queue, remove */
+ GNUNET_CONTAINER_DLL_remove (h->control_pending_head,
+ h->control_pending_tail,
+ th->cm);
+ GNUNET_free (th->cm);
+ }
+ GNUNET_free (th);
+ if (was_head)
+ {
+ if ( (pr->prev != NULL) ||
+ (pr->next != NULL) ||
+ (pr == h->ready_peer_head) )
+ {
+ /* the request that was 'approved' by core was
+ canceled before it could be transmitted; remove
+ us from the 'ready' list */
+ GNUNET_CONTAINER_DLL_remove (h->ready_peer_head,
+ h->ready_peer_tail,
+ pr);
+ }
+ request_next_transmission (pr);
+ }
+}
+
+
+/* ****************** GNUNET_CORE_peer_request_connect ******************** */
+
+/**
+ * Handle for a request to the core to connect to
+ * a particular peer. Can be used to cancel the request
+ * (before the 'cont'inuation is called).
+ */
+struct GNUNET_CORE_PeerRequestHandle
+{
+
+ /**
+ * Link to control message.
+ */
+ struct ControlMessage *cm;
+
+ /**
+ * Core handle used.
+ */
+ struct GNUNET_CORE_Handle *h;
+
+ /**
+ * Continuation to run when done.
+ */
+ GNUNET_CORE_ControlContinuation cont;
+
+ /**
+ * Closure for 'cont'.
+ */
+ void *cont_cls;
+
+};
+
+
+/**
+ * Continuation called when the control message was transmitted.
+ * Calls the original continuation and frees the remaining
+ * resources.
+ *
+ * @param cls the 'struct GNUNET_CORE_PeerRequestHandle'
+ * @param success was the request transmitted?
+ */
+static void
+peer_request_connect_cont (void *cls,
+ int success)
+{
+ struct GNUNET_CORE_PeerRequestHandle *ret = cls;
+
+ if (ret->cont != NULL)
+ ret->cont (ret->cont_cls, success);
+ GNUNET_free (ret);
+}
+
+
+/**
+ * Request that the core should try to connect to a particular peer.
+ * Once the request has been transmitted to the core, the continuation
+ * function will be called. Note that this does NOT mean that a
+ * connection was successfully established -- it only means that the
+ * core will now try. Successful establishment of the connection
+ * will be signalled to the 'connects' callback argument of
+ * 'GNUNET_CORE_connect' only. If the core service does not respond
+ * to our connection attempt within the given time frame, 'cont' will
+ * be called with the TIMEOUT reason code.
+ *
+ * @param h core handle
+ * @param timeout how long to try to talk to core
+ * @param peer who should we connect to
+ * @param cont function to call once the request has been completed (or timed out)
+ * @param cont_cls closure for cont
+ *
+ * @return NULL on error or already connected,
+ * otherwise handle for cancellation
+ */
+struct GNUNET_CORE_PeerRequestHandle *
+GNUNET_CORE_peer_request_connect (struct GNUNET_CORE_Handle *h,
+ struct GNUNET_TIME_Relative timeout,
+ const struct GNUNET_PeerIdentity * peer,
+ GNUNET_CORE_ControlContinuation cont,
+ void *cont_cls)
+{
+ struct GNUNET_CORE_PeerRequestHandle *ret;
+ struct ControlMessage *cm;
+ struct ConnectMessage *msg;
+
+ if (NULL != GNUNET_CONTAINER_multihashmap_get (h->peers,
+ &peer->hashPubKey))
+ return NULL; /* Already connected, means callback should have happened already! */
+
+
+ cm = GNUNET_malloc (sizeof (struct ControlMessage) +
+ sizeof (struct ConnectMessage));
+ msg = (struct ConnectMessage*) &cm[1];
+ msg->header.type = htons (GNUNET_MESSAGE_TYPE_CORE_REQUEST_CONNECT);
+ msg->header.size = htons (sizeof (struct ConnectMessage));
+ msg->reserved = htonl (0);
+ msg->timeout = GNUNET_TIME_relative_hton (timeout);
+ msg->peer = *peer;
+ GNUNET_CONTAINER_DLL_insert (h->control_pending_head,
+ h->control_pending_tail,
+ cm);
+ ret = GNUNET_malloc (sizeof (struct GNUNET_CORE_PeerRequestHandle));
+ ret->h = h;
+ ret->cm = cm;
+ ret->cont = cont;
+ ret->cont_cls = cont_cls;
+ cm->cont = &peer_request_connect_cont;
+ cm->cont_cls = ret;
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Queueing REQUEST_CONNECT request\n");
+#endif
+ if (h->control_pending_head == cm)
+ trigger_next_request (h, GNUNET_NO);
+ return ret;
+}
+
+
+/**
+ * Cancel a pending request to connect to a particular peer. Must not
+ * be called after the 'cont' function was invoked.
+ *
+ * @param req request handle that was returned for the original request
+ */
+void
+GNUNET_CORE_peer_request_connect_cancel (struct GNUNET_CORE_PeerRequestHandle *req)
+{
+ struct GNUNET_CORE_Handle *h = req->h;
+ struct ControlMessage *cm = req->cm;
+
+ GNUNET_CONTAINER_DLL_remove (h->control_pending_head,
+ h->control_pending_tail,
+ cm);
+ GNUNET_free (cm);
+ GNUNET_free (req);
+}
+
+
+/* ****************** GNUNET_CORE_peer_change_preference ******************** */
+
+
+struct GNUNET_CORE_InformationRequestContext
+{
+
+ /**
+ * Our connection to the service.
+ */
+ struct GNUNET_CORE_Handle *h;
+
+ /**
+ * Function to call with the information.
+ */
+ GNUNET_CORE_PeerConfigurationInfoCallback info;
+
+ /**
+ * Closure for info.
+ */
+ void *info_cls;
+
+ /**
+ * Link to control message, NULL if CM was sent.
+ */
+ struct ControlMessage *cm;
+
+ /**
+ * Link to peer record.
+ */
+ struct PeerRecord *pr;
+};
+
+
+/**
+ * CM was sent, remove link so we don't double-free.
+ *
+ * @param cls the 'struct GNUNET_CORE_InformationRequestContext'
+ * @param success were we successful?
+ */
+static void
+change_preference_send_continuation (void *cls,
+ int success)
{
- struct GNUNET_CORE_Handle *handle = h->ch;
+ struct GNUNET_CORE_InformationRequestContext *irc = cls;
- if (handle->submitted == h)
+ irc->cm = NULL;
+}
+
+
+/**
+ * Obtain statistics and/or change preferences for the given peer.
+ *
+ * @param h core handle
+ * @param peer identifies the peer
+ * @param timeout after how long should we give up (and call "info" with NULL
+ * for "peer" to signal an error)?
+ * @param bw_out set to the current bandwidth limit (sending) for this peer,
+ * caller should set "bw_out" to "-1" to avoid changing
+ * the current value; otherwise "bw_out" will be lowered to
+ * the specified value; passing a pointer to "0" can be used to force
+ * us to disconnect from the peer; "bw_out" might not increase
+ * as specified since the upper bound is generally
+ * determined by the other peer!
+ * @param amount reserve N bytes for receiving, negative
+ * amounts can be used to undo a (recent) reservation;
+ * @param preference increase incoming traffic share preference by this amount;
+ * in the absence of "amount" reservations, we use this
+ * preference value to assign proportional bandwidth shares
+ * to all connected peers
+ * @param info function to call with the resulting configuration information
+ * @param info_cls closure for info
+ * @return NULL on error
+ */
+struct GNUNET_CORE_InformationRequestContext *
+GNUNET_CORE_peer_change_preference (struct GNUNET_CORE_Handle *h,
+ const struct GNUNET_PeerIdentity *peer,
+ struct GNUNET_TIME_Relative timeout,
+ struct GNUNET_BANDWIDTH_Value32NBO bw_out,
+ int32_t amount,
+ uint64_t preference,
+ GNUNET_CORE_PeerConfigurationInfoCallback info,
+ void *info_cls)
+{
+ struct GNUNET_CORE_InformationRequestContext *irc;
+ struct PeerRecord *pr;
+ struct RequestInfoMessage *rim;
+ struct ControlMessage *cm;
+
+ pr = GNUNET_CONTAINER_multihashmap_get (h->peers,
+ &peer->hashPubKey);
+ if (NULL == pr)
{
- handle->submitted = NULL;
+ /* attempt to change preference on peer that is not connected */
+ GNUNET_break (0);
+ return NULL;
}
- else
+ if (pr->pcic != NULL)
{
- if (h->prev == NULL)
- handle->pending_head = h->next;
- else
- h->prev->next = h->next;
- if (h->next == NULL)
- handle->pending_tail = h->prev;
- else
- h->next->prev = h->prev;
+ /* second change before first one is done */
+ GNUNET_break (0);
+ return NULL;
+ }
+ irc = GNUNET_malloc (sizeof (struct GNUNET_CORE_InformationRequestContext));
+ irc->h = h;
+ irc->pr = pr;
+ irc->info = info;
+ irc->info_cls = info_cls;
+ cm = GNUNET_malloc (sizeof (struct ControlMessage) +
+ sizeof (struct RequestInfoMessage));
+ cm->cont = &change_preference_send_continuation;
+ cm->cont_cls = irc;
+ irc->cm = cm;
+ rim = (struct RequestInfoMessage*) &cm[1];
+ rim->header.size = htons (sizeof (struct RequestInfoMessage));
+ rim->header.type = htons (GNUNET_MESSAGE_TYPE_CORE_REQUEST_INFO);
+ rim->rim_id = htonl (pr->rim_id = h->rim_id_gen++);
+ rim->limit_outbound = bw_out;
+ rim->reserve_inbound = htonl (amount);
+ rim->preference_change = GNUNET_htonll(preference);
+ rim->peer = *peer;
+#if DEBUG_CORE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Queueing CHANGE PREFERENCE request\n");
+#endif
+ GNUNET_CONTAINER_DLL_insert (h->control_pending_head,
+ h->control_pending_tail,
+ cm);
+ pr->pcic = info;
+ pr->pcic_cls = info_cls;
+ if (h->control_pending_head == cm)
+ trigger_next_request (h, GNUNET_NO);
+ return irc;
+}
+
+
+/**
+ * Cancel request for getting information about a peer.
+ * Note that an eventual change in preference, trust or bandwidth
+ * assignment MAY have already been committed at the time,
+ * so cancelling a request is NOT sure to undo the original
+ * request. The original request may or may not still commit.
+ * The only thing cancellation ensures is that the callback
+ * from the original request will no longer be called.
+ *
+ * @param irc context returned by the original GNUNET_CORE_peer_get_info call
+ */
+void
+GNUNET_CORE_peer_change_preference_cancel (struct GNUNET_CORE_InformationRequestContext *irc)
+{
+ struct GNUNET_CORE_Handle *h = irc->h;
+ struct PeerRecord *pr = irc->pr;
+
+ if (irc->cm != NULL)
+ {
+ GNUNET_CONTAINER_DLL_remove (h->control_pending_head,
+ h->control_pending_tail,
+ irc->cm);
+ GNUNET_free (irc->cm);
}
- if (h->timeout_task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel (handle->sched, h->timeout_task);
- GNUNET_free (h);
+ pr->pcic = NULL;
+ pr->pcic_cls = NULL;
+ GNUNET_free (irc);
}
projects / oweals / gnunet.git / blobdiff