struct ClientList *next;
/**
- * ID of a client making a request, NULL if this entry is for a
- * peer.
+ * ID of a client.
*/
struct GNUNET_SERVER_Client *client;
--- /dev/null
+/*
+ This file is part of GNUnet.
+ (C) 2011 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 3, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file fs/gnunet-service-fs_cp.c
+ * @brief API to handle 'connected peers'
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "gnunet-service-fs.h"
+#include "gnunet-service-fs_cp.h"
+
+
+struct GSF_PeerTransmitHandle
+{
+
+ /**
+ * Time when this transmission request was issued.
+ */
+ struct GNUNET_TIME_Absolute transmission_request_start_time;
+
+
+};
+
+
+/**
+ * A connected peer.
+ */
+struct GSF_ConnectedPeer
+{
+
+ /**
+ * Performance data for this peer.
+ */
+ struct GSF_PeerPerformanceData ppd;
+
+ /**
+ * Time until when we blocked this peer from migrating
+ * data to us.
+ */
+ struct GNUNET_TIME_Absolute last_migration_block;
+
+ /**
+ * Handle for an active request for transmission to this
+ * peer, or NULL.
+ */
+ struct GNUNET_CORE_TransmitHandle *cth;
+
+ /**
+ * Messages (replies, queries, content migration) we would like to
+ * send to this peer in the near future. Sorted by priority, head.
+ */
+ struct GSF_PeerTransmitHandle *pth_head;
+
+ /**
+ * Messages (replies, queries, content migration) we would like to
+ * send to this peer in the near future. Sorted by priority, tail.
+ */
+ struct GSF_PeerTransmitHandle *pth_tail;
+
+ /**
+ * Context of our GNUNET_CORE_peer_change_preference call (or NULL).
+ */
+ struct GNUNET_CORE_InformationRequestContext *irc;
+
+ /**
+ * ID of delay task for scheduling transmission.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier delayed_transmission_request_task;
+
+ /**
+ * Increase in traffic preference still to be submitted
+ * to the core service for this peer.
+ */
+ uint64_t inc_preference;
+
+ /**
+ * Trust rating for this peer
+ */
+ uint32_t trust;
+
+ /**
+ * Trust rating for this peer on disk.
+ */
+ uint32_t disk_trust;
+
+ /**
+ * The peer's identity.
+ */
+ GNUNET_PEER_Id pid;
+
+ /**
+ * Which offset in "last_p2p_replies" will be updated next?
+ * (we go round-robin).
+ */
+ unsigned int last_p2p_replies_woff;
+
+ /**
+ * Which offset in "last_client_replies" will be updated next?
+ * (we go round-robin).
+ */
+ unsigned int last_client_replies_woff;
+
+ /**
+ * Current offset into 'last_request_times' ring buffer.
+ */
+ unsigned int last_request_times_off;
+
+};
+
+
+/**
+ * A peer connected to us. Setup the connected peer
+ * records.
+ *
+ * @param peer identity of peer that connected
+ * @param atsi performance data for the connection
+ * @return handle to connected peer entry
+ */
+struct GSF_ConnectedPeer *
+GSF_peer_connect_handler_ (const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_TRANSPORT_ATS_Information *atsi)
+{
+ // FIXME
+ return NULL;
+}
+
+
+/**
+ * Transmit a message to the given peer as soon as possible.
+ * If the peer disconnects before the transmission can happen,
+ * the callback is invoked with a 'NULL' buffer.
+ *
+ * @param peer target peer
+ * @param is_query is this a query (GNUNET_YES) or content (GNUNET_NO)
+ * @param priority how important is this request?
+ * @param timeout when does this request timeout (call gmc with error)
+ * @param size number of bytes we would like to send to the peer
+ * @param gmc function to call to get the message
+ * @param gmc_cls closure for gmc
+ * @return handle to cancel request
+ */
+struct GSF_PeerTransmitHandle *
+GSF_peer_transmit_ (struct GSF_ConnectedPeer *peer,
+ int is_query,
+ uint32_t priority,
+ struct GNUNET_TIME_Relative timeout,
+ size_t size,
+ GSF_GetMessageCallback gmc,
+ void *gmc_cls)
+{
+ // FIXME
+ return NULL;
+}
+
+
+/**
+ * Cancel an earlier request for transmission.
+ */
+void
+GSF_peer_transmit_cancel_ (struct GSF_PeerTransmitHandle *pth)
+{
+}
+
+
+/**
+ * Report on receiving a reply; update the performance record of the given peer.
+ *
+ * @param peer responding peer (will be updated)
+ * @param request_time time at which the original query was transmitted
+ * @param request_priority priority of the original request
+ * @param initiator_client local client on responsible for query (or NULL)
+ * @param initiator_peer other peer responsible for query (or NULL)
+ */
+void
+GSF_peer_update_performance_ (struct GSF_ConnectedPeer *peer,
+ GNUNET_TIME_Absolute request_time,
+ uint32_t request_priority,
+ const struct GSF_LocalClient *initiator_client,
+ const struct GSF_ConnectedPeer *initiator_peer)
+{
+}
+
+
+/**
+ * Method called whenever a given peer has a status change.
+ *
+ * @param cls closure
+ * @param peer peer identity this notification is about
+ * @param bandwidth_in available amount of inbound bandwidth
+ * @param bandwidth_out available amount of outbound bandwidth
+ * @param timeout absolute time when this peer will time out
+ * unless we see some further activity from it
+ * @param atsi status information
+ */
+void
+GSF_peer_status_handler_ (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
+ struct GNUNET_TIME_Absolute timeout,
+ const struct GNUNET_TRANSPORT_ATS_Information *atsi)
+{
+}
+
+
+/**
+ * A peer disconnected from us. Tear down the connected peer
+ * record.
+ *
+ * @param cls unused
+ * @param peer identity of peer that connected
+ */
+void
+GSF_peer_disconnect_handler_ (void *cls,
+ const struct GNUNET_PeerIdentity *peer)
+{
+}
+
+
+/**
+ * Iterate over all connected peers.
+ *
+ * @param it function to call for each peer
+ * @param it_cls closure for it
+ */
+void
+GSF_iterate_connected_peers_ (GSF_ConnectedPeerIterator it,
+ void *it_cls)
+{
+}
+
+
+/**
+ * Try to reserve bandwidth (to receive data FROM the given peer).
+ * This function must only be called ONCE per connected peer at a
+ * time; it can be called again after the 'rc' callback was invoked.
+ * If the peer disconnects, the request is (silently!) ignored (and
+ * the requester is responsible to register for notification about the
+ * peer disconnect if any special action needs to be taken in this
+ * case).
+ *
+ * @param cp peer to reserve bandwidth from
+ * @param size number of bytes to reserve
+ * @param rc function to call upon reservation success or failure
+ * @param rc_cls closure for rc
+ */
+void
+GSF_connected_peer_reserve_ (struct GSF_ConnectedPeer *cp,
+ size_t size,
+ GSF_PeerReserveCallback rc,
+ void *rc_cls)
+{
+ // FIXME: should we allow queueing multiple reservation requests?
+ // FIXME: what about cancellation?
+ // FIXME: change docu on peer disconnect handling?
+ if (NULL != cp->irc)
+ {
+ rc (rc_cls, cp, GNUNET_NO);
+ return;
+ }
+ // FIXME...
+}
+
+
+#endif
+/* end of gnunet-service-fs_cp.h */
/**
- * A peer connected to us. Setup the connected peer
- * records.
+ * Performance data kept for a peer.
+ */
+struct GSF_PeerPerformanceData
+{
+
+ /**
+ * Transport performance data.
+ */
+ struct GNUNET_TRANSPORT_ATS_Information *atsi;
+
+ /**
+ * List of the last clients for which this peer successfully
+ * answered a query.
+ */
+ struct GSF_LocalClient *last_client_replies[CS2P_SUCCESS_LIST_SIZE];
+
+ /**
+ * List of the last PIDs for which
+ * this peer successfully answered a query;
+ * We use 0 to indicate no successful reply.
+ */
+ GNUNET_PEER_Id last_p2p_replies[P2P_SUCCESS_LIST_SIZE];
+
+ /**
+ * Average delay between sending the peer a request and
+ * getting a reply (only calculated over the requests for
+ * which we actually got a reply). Calculated
+ * as a moving average: new_delay = ((n-1)*last_delay+curr_delay) / n
+ */
+ struct GNUNET_TIME_Relative avg_reply_delay;
+
+ /**
+ * Point in time until which this peer does not want us to migrate content
+ * to it.
+ */
+ struct GNUNET_TIME_Absolute migration_blocked_until;
+
+ /**
+ * Transmission times for the last MAX_QUEUE_PER_PEER
+ * requests for this peer. Used as a ring buffer, current
+ * offset is stored in 'last_request_times_off'. If the
+ * oldest entry is more recent than the 'avg_delay', we should
+ * not send any more requests right now.
+ */
+ struct GNUNET_TIME_Absolute last_request_times[MAX_QUEUE_PER_PEER];
+
+ /**
+ * How long does it typically take for us to transmit a message
+ * to this peer? (delay between the request being issued and
+ * the callback being invoked).
+ */
+ struct GNUNET_LOAD_Value *transmission_delay;
+
+ /**
+ * Average priority of successful replies. Calculated
+ * as a moving average: new_avg = ((n-1)*last_avg+curr_prio) / n
+ */
+ double avg_priority;
+
+ /**
+ * Number of pending queries (replies are not counted)
+ */
+ unsigned int pending_queries;
+
+ /**
+ * Number of pending replies (queries are not counted)
+ */
+ unsigned int pending_replies;
+
+};
+
+
+/**
+ * Signature of function called on a connected peer.
*
- * @param peer identity of peer that connected
- * @param atsi performance data for the connection
- * @return handle to connected peer entry
+ * @param cls closure
+ * @param peer identity of the peer
+ * @param cp handle to the connected peer record
+ * @param perf peer performance data
*/
-struct GSF_ConnectedPeer *
-GSF_peer_connect_handler_ (const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_TRANSPORT_ATS_Information *atsi);
+typedef void (*GSF_ConnectedPeerIterator)(void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ struct GSF_ConnectedPeer *cp,
+ const struct GSF_PeerPerformanceData *ppd);
/**
void *buf);
+/**
+ * Signature of function called on a reservation success or failure.
+ *
+ * @param cls closure
+ * @param cp handle to the connected peer record
+ * @param success GNUNET_YES on success, GNUNET_NO on failure
+ */
+typedef void (*GSF_PeerReserveCallback)(void *cls,
+ struct GSF_ConnectedPeer *cp,
+ int success);
+
+
+/**
+ * Handle to cancel a transmission request.
+ */
+struct GSF_PeerTransmitHandle;
+
+
+/**
+ * A peer connected to us. Setup the connected peer
+ * records.
+ *
+ * @param peer identity of peer that connected
+ * @param atsi performance data for the connection
+ * @return handle to connected peer entry
+ */
+struct GSF_ConnectedPeer *
+GSF_peer_connect_handler_ (const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_TRANSPORT_ATS_Information *atsi);
+
+
/**
* Transmit a message to the given peer as soon as possible.
* If the peer disconnects before the transmission can happen,
* the callback is invoked with a 'NULL' buffer.
*
* @param peer target peer
+ * @param is_query is this a query (GNUNET_YES) or content (GNUNET_NO)
+ * @param priority how important is this request?
+ * @param timeout when does this request timeout (call gmc with error)
* @param size number of bytes we would like to send to the peer
* @param gmc function to call to get the message
* @param gmc_cls closure for gmc
+ * @return handle to cancel request
*/
-void
+struct GSF_PeerTransmitHandle *
GSF_peer_transmit_ (struct GSF_ConnectedPeer *peer,
+ int is_query,
+ uint32_t priority,
+ struct GNUNET_TIME_Relative timeout,
size_t size,
GSF_GetMessageCallback gmc,
void *gmc_cls);
+/**
+ * Cancel an earlier request for transmission.
+ */
+void
+GSF_peer_transmit_cancel_ (struct GSF_PeerTransmitHandle *pth);
+
+
+/**
+ * Report on receiving a reply; update the performance record of the given peer.
+ *
+ * @param peer responding peer (will be updated)
+ * @param request_time time at which the original query was transmitted
+ * @param request_priority priority of the original request
+ * @param initiator_client local client on responsible for query (or NULL)
+ * @param initiator_peer other peer responsible for query (or NULL)
+ */
+void
+GSF_peer_update_performance_ (struct GSF_ConnectedPeer *peer,
+ GNUNET_TIME_Absolute request_time,
+ uint32_t request_priority,
+ const struct GSF_LocalClient *initiator_client,
+ const struct GSF_ConnectedPeer *initiator_peer);
+
+
/**
* Method called whenever a given peer has a status change.
*
/**
- * Signature of function called on a connected peer.
+ * Notification that a local client disconnected. Clean up all of our
+ * references to the given handle.
*
- * @param cls closure
- * @param peer identity of the peer
- * @param cp handle to the connected peer record
+ * @param lc handle to the local client (henceforth invalid)
*/
-typedef void (*GSF_ConnectedPeerIterator)(void *cls,
- const struct GNUNET_PeerIdentity *peer,
- struct GSF_ConnectedPeer *cp);
+void
+GSF_handle_local_client_disconnect_ (const struct GSF_LocalClient *lc);
/**
void *it_cls);
-/**
- * Register callback to invoke on peer disconnect.
- *
- * @param cp peer to monitor
- * @param it function to call on disconnect
- * @param it_cls closure for it
- */
-void
-GSF_connected_peer_register_disconnect_callback_ (struct GSF_ConnectedPeer *cp,
- GSF_ConnectedPeerIterator it,
- void *it_cls);
-
-
-/**
- * Unregister callback to invoke on peer disconnect.
- *
- * @param cp peer to stop monitoring
- * @param it function to no longer call on disconnect
- * @param it_cls closure for it
- */
-void
-GSF_connected_peer_unregister_disconnect_callback_ (struct GSF_ConnectedPeer *cp,
- GSF_ConnectedPeerIterator it,
- void *it_cls);
-
-
-/**
- * Signature of function called on a reservation success.
- *
- * @param cls closure
- * @param cp handle to the connected peer record
- */
-typedef void (*GSF_PeerReserveCallback)(void *cls,
- struct GSF_ConnectedPeer *cp);
-
-
+// FIXME: should we allow queueing multiple reservation requests?
+// FIXME: what about cancellation?
+// FIXME: change docu on peer disconnect handling?
/**
* Try to reserve bandwidth (to receive data FROM the given peer).
* This function must only be called ONCE per connected peer at a
--- /dev/null
+/*
+ This file is part of GNUnet.
+ (C) 2011 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 3, or (at your
+ option) any later version.
+
+ GNUnet is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file fs/gnunet-service-fs_lc.c
+ * @brief API to handle 'connected peers'
+ * @author Christian Grothoff
+ */
+
+#include "platform.h"
+#include "gnunet-service-fs_lc.h"
+
+
+/**
+ * Doubly-linked list of requests we are performing
+ * on behalf of the same client.
+ */
+struct ClientRequest
+{
+
+ /**
+ * This is a doubly-linked list.
+ */
+ struct ClientRequest *next;
+
+ /**
+ * This is a doubly-linked list.
+ */
+ struct ClientRequest *prev;
+
+ /**
+ * Request this entry represents.
+ */
+ struct GSF_PendingRequest *pr;
+
+ /**
+ * Client list this request belongs to.
+ */
+ struct GSF_LocalClient *lc;
+
+};
+
+
+
+/**
+ * Replies to be transmitted to the client. The actual
+ * response message is allocated after this struct.
+ */
+struct ClientResponse
+{
+ /**
+ * This is a doubly-linked list.
+ */
+ struct ClientResponse *next;
+
+ /**
+ * This is a doubly-linked list.
+ */
+ struct ClientResponse *prev;
+
+ /**
+ * Client list entry this response belongs to.
+ */
+ struct GSF_LocalClient *lc;
+
+ /**
+ * Number of bytes in the response.
+ */
+ size_t msize;
+};
+
+
+
+/**
+ * A local client.
+ */
+struct GSF_LocalClient
+{
+
+ /**
+ * We keep clients in a DLL.
+ */
+ struct GSF_LocalClient *next;
+
+ /**
+ * We keep clients in a DLL.
+ */
+ struct GSF_LocalClient *prev;
+
+ /**
+ * ID of the client.
+ */
+ struct GNUNET_SERVER_Client *client;
+
+ /**
+ * Head of list of requests performed on behalf
+ * of this client right now.
+ */
+ struct ClientRequest *cr_head;
+
+ /**
+ * Tail of list of requests performed on behalf
+ * of this client right now.
+ */
+ struct ClientRequest *cr_tail;
+
+ /**
+ * Head of linked list of responses.
+ */
+ struct ClientResponse *res_head;
+
+ /**
+ * Tail of linked list of responses.
+ */
+ struct ClientResponse *res_tail;
+
+ /**
+ * Context for sending replies.
+ */
+ struct GNUNET_CONNECTION_TransmitHandle *th;
+
+};
+
+
+/**
+ * Head of linked list of our local clients.
+ */
+static struct GSF_LocalClient *client_head;
+
+
+/**
+ * Head of linked list of our local clients.
+ */
+static struct GSF_LocalClient *client_tail;
+
+
+/**
+ * Look up a local client record or create one if it
+ * doesn't exist yet.
+ *
+ * @param client handle of the client
+ * @return handle to local client entry
+ */
+struct GSF_LocalClient *
+GSF_local_client_lookup_ (struct GNUNET_SERVER_Client *client)
+{
+ struct GSF_LocalClient *pos;
+
+ pos = client_head;
+ while ( (pos != NULL) &&
+ (pos->client != client) )
+ pos = pos->next;
+ if (pos != NULL)
+ return pos;
+ pos = GNUNET_malloc (sizeof (struct GSF_LocalClient));
+ pos->client = client;
+ GNUNET_CONTAINER_DLL_insert (client_head,
+ client_tail,
+ pos);
+ return pos;
+}
+
+
+/**
+ * Handle START_SEARCH-message (search request from local client).
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param message the actual message
+ */
+void
+GSF_local_client_start_search_handler_ (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ static GNUNET_HashCode all_zeros;
+ const struct SearchMessage *sm;
+ struct GSF_LocalClient *lc;
+ struct ClientRequest *cr;
+ struct GSF_PendingRequest *pr;
+ uint16_t msize;
+ unsigned int sc;
+ enum GNUNET_BLOCK_Type type;
+ enum GSF_PendingRequestOptions options;
+
+ msize = ntohs (message->size);
+ if ( (msize < sizeof (struct SearchMessage)) ||
+ (0 != (msize - sizeof (struct SearchMessage)) % sizeof (GNUNET_HashCode)) )
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# client searches received"),
+ 1,
+ GNUNET_NO);
+ sc = (msize - sizeof (struct SearchMessage)) / sizeof (GNUNET_HashCode);
+ sm = (const struct SearchMessage*) message;
+ type = ntohl (sm->type);
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received request for `%s' of type %u from local client\n",
+ GNUNET_h2s (&sm->query),
+ (unsigned int) type);
+#endif
+ lc = GSF_local_client_lookup_ (client);
+
+
+ /* detect duplicate KBLOCK requests */
+ if ( (type == GNUNET_BLOCK_TYPE_FS_KBLOCK) ||
+ (type == GNUNET_BLOCK_TYPE_FS_NBLOCK) ||
+ (type == GNUNET_BLOCK_TYPE_ANY) )
+ {
+ cr = lc->cr_head;
+ while ( (cl != NULL) &&
+ ( (0 != memcmp (GSF_pending_request_get_query_ (cr->pr),
+ &sm->query,
+ sizeof (GNUNET_HashCode))) ||
+ (GSF_pending_request_get_type_ (cr->pr) != type) ) )
+ cr = cr->next;
+ if (crl != NULL)
+ {
+#if DEBUG_FS
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Have existing request, merging content-seen lists.\n");
+#endif
+ GSF_pending_request_update_ (cr->pr,
+ &sm[1],
+ sc);
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# client searches updated (merged content seen list)"),
+ 1,
+ GNUNET_NO);
+ GNUNET_SERVER_receive_done (client,
+ GNUNET_OK);
+ return;
+ }
+ }
+
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# client searches active"),
+ 1,
+ GNUNET_NO);
+ cr = GNUNET_malloc (sizeof (struct ClientRequest));
+ cr->lc = lc;
+ GNUNET_CONTAINER_DLL_insert (lc->cr_head,
+ lc->cr_tail,
+ cr);
+ options = GSF_PRO_LOCAL_REQUEST;
+ if (0 != (1 & ntohl (sm->options)))
+ options |= GSF_PRO_LOCAL_ONLY;
+ cr->pr = GSF_pending_request_create (options,
+
+ type,
+ &sm->query,
+ (type == GNUNET_BLOCK_TYPE_SBLOCK)
+ ? &sm->target /* namespace */
+ : NULL,
+ (0 != memcmp (&sm->target,
+ &all_zeros,
+ sizeof (GNUNET_HashCode)))
+ ? &sm->target,
+ : NULL,
+ NULL /* bf */, 0 /* mingle */,
+ ntohl (sm->anonymity_level),
+ 0 /* priority */,
+ &sm[1], sc,
+ &client_response_handler,
+ cr);
+ // FIXME: start local processing and/or P2P processing?
+}
+
+
+/**
+ * Transmit the given message by copying it to the target buffer
+ * "buf". "buf" will be NULL and "size" zero if the socket was closed
+ * for writing in the meantime. In that case, do nothing
+ * (the disconnect or shutdown handler will take care of the rest).
+ * If we were able to transmit messages and there are still more
+ * pending, ask core again for further calls to this function.
+ *
+ * @param cls closure, pointer to the 'struct GSF_LocalClient'
+ * @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_to_client (void *cls,
+ size_t size,
+ void *buf)
+{
+ struct GSF_LocalClient *lc = cls;
+ char *cbuf = buf;
+ struct ClientResponse *res;
+ size_t msize;
+
+ cl->th = NULL;
+ if (NULL == buf)
+ return 0;
+ msize = 0;
+ while ( (NULL != (res = lc->res_head) ) &&
+ (res->msize <= size) )
+ {
+ memcpy (&cbuf[msize], &res[1], res->msize);
+ msize += res->msize;
+ size -= res->msize;
+ GNUNET_CONTAINER_DLL_remove (cl->res_head,
+ cl->res_tail,
+ res);
+ GNUNET_free (res);
+ }
+ if (NULL != res)
+ lc->th = GNUNET_SERVER_notify_transmit_ready (lc->client,
+ res->msize,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &transmit_to_client,
+ lc);
+ return msize;
+}
+
+
+/**
+ * Transmit a message to the given local client as soon as possible.
+ * If the client disconnects before transmission, the message is
+ * simply discarded.
+ *
+ * @param lc recipient
+ * @param msg message to transmit to client
+ */
+void
+GSF_local_client_transmit_ (struct GSF_LocalClient *lc,
+ const struct GNUNET_MessageHeader *msg)
+{
+ struct ClientResponse *res;
+ size_t msize;
+
+ msize = ntohs (msg->size);
+ res = GNUNET_malloc (sizeof (struct ClientResponse) + msize);
+ res->lc = lc;
+ res->msize = msize;
+ GNUNET_CONTAINER_DLL_insert_tail (lc->res_head,
+ lc->res_tail,
+ res);
+ if (NULL == lc->tc)
+ lc->tc = GNUNET_CLIENT_notify_transmit_ready (lc->client,
+ msize,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_NO,
+ &transmit_to_client,
+ lc);
+}
+
+
+/**
+ * A client disconnected from us. Tear down the local client
+ * record.
+ *
+ * @param cls unused
+ * @param client handle of the client
+ */
+void
+GSF_client_disconnect_handler_ (void *cls,
+ const struct GNUNET_SERVER_Client *client)
+{
+ struct GSF_LocalClient *pos;
+ struct DisconnectCallback *dc;
+ struct ClientRequest *cr;
+ struct ClientResponse *res;
+
+ pos = client_head;
+ while ( (pos != NULL) &&
+ (pos->client != client) )
+ pos = pos->next;
+ if (pos == NULL)
+ return pos;
+ while (NULL != (cr = pos->cr_head))
+ {
+ GNUNET_CONTAINER_DLL_remove (pos->cr_head,
+ pos->cr_tail,
+ cr);
+ GSF_pending_request_cancel_ (cr->pr);
+ GNUNET_free (cr);
+ }
+ while (NULL != (res = pos->res_head))
+ {
+ GNUNET_CONTAINER_DLL_remove (pos->res_head,
+ pos->res_tail,
+ res);
+ GNUNET_free (res);
+ }
+ if (pos->th != NULL)
+ {
+ GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
+ pos->th = NULL;
+ }
+ GSF_handle_local_client_disconnect_ (pos);
+ GNUNET_free (pos);
+}
+
+
+/* end of gnunet-service-fs_lc.c */
/**
- * A local client disconnected from us. Tear down the local client
- * record.
+ * A client disconnected from us. Tear down the local client record.
*
* @param cls unused
* @param client handle of the client
*/
void
-GSF_local_client_disconnect_handler_ (void *cls,
- const struct GNUNET_SERVER_Client *client);
+GSF_client_disconnect_handler_ (void *cls,
+ const struct GNUNET_SERVER_Client *client);
-
-/**
- * Signature of function called on a local client
- *
- * @param cls closure
- * @param lc local client handle
- */
-typedef int (*GSF_LocalClientIterator)(void *cls,
- struct GSF_LocalClient *lc);
-
-
-
-/**
- * Register callback to invoke on local client disconnect.
- *
- * @param lc client to monitor
- * @param it function to call on disconnect
- * @param it_cls closure for it
- */
-void
-GSF_local_client_register_disconnect_callback_ (struct GSF_LocalClient *lc,
- GSF_LocalClientIterator it,
- void *it_cls);
-
-
-/**
- * Register callback to invoke on local client disconnect.
- *
- * @param lc client to stop monitoring
- * @param it function to no longer call on disconnect
- * @param it_cls closure for it
- */
-void
-GSF_local_client_unregister_disconnect_callback_ (struct GSF_LocalClient *lc,
- GSF_PendingRequestIterator it,
- void *it_cls);
-
#endif
/* end of gnunet-service-fs_lc.h */
/*
This file is part of GNUnet.
- (C) 2009, 2010 Christian Grothoff (and other contributing authors)
+ (C) 2009, 2010, 2011 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
void *rh_cls);
+/**
+ * Update a given pending request with additional replies
+ * that have been seen.
+ *
+ * @param pr request to update
+ * @param replies_seen hash codes of replies that we've seen
+ * @param replies_seen_count size of the replies_seen array
+ */
+void
+GSF_pending_request_update_ (struct GSF_PendingRequest *pr,
+ const GNUNET_HashCode *replies_seen,
+ unsigned int replies_seen_count);
+
+
+/**
+ * Get the query for a given pending request.
+ *
+ * @param pr the request
+ * @return pointer to the query (only valid as long as pr is valid)
+ */
+const GNUNET_HashCode *
+GSF_pending_request_get_query_ (const struct GSF_PendingRequest *pr);
+
+
+/**
+ * Get the type of a given pending request.
+ *
+ * @param pr the request
+ * @return query type
+ */
+enum GNUNET_BLOCK_Type
+GSF_pending_request_get_type_ (const struct GSF_PendingRequest *pr);
+
+
/**
* Generate the message corresponding to the given pending request for
* transmission to other peers (or at least determine its size).
-/**
- * Register callback to invoke on request destruction.
- *
- * @param pr request to monitor
- * @param it function to call on destruction
- * @param it_cls closure for it
- */
-void
-GSF_pending_request_register_destroy_callback_ (struct GSF_PendingRequest *pr,
- GSF_PendingRequestIterator it,
- void *it_cls);
-
-
-/**
- * Unregister callback to invoke on request destruction.
- *
- * @param pr request to stop monitoring
- * @param it function to no longer call on destruction
- * @param it_cls closure for it
- */
-void
-GSF_pending_request_unregister_destroy_callback_ (struct GSF_PendingRequest *pr,
- GSF_PendingRequestIterator it,
- void *it_cls);
-
-
#endif
/* end of gnunet-service-fs_pr.h */
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