/*
This file is part of GNUnet.
- (C) 2009 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
- 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
#endif
#endif
-#include "gnunet_configuration_lib.h"
-#include "gnunet_crypto_lib.h"
-#include "gnunet_connection_lib.h"
-#include "gnunet_scheduler_lib.h"
-#include "gnunet_time_lib.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_ats_service.h"
/**
* Version number of the transport API.
*/
#define GNUNET_TRANSPORT_VERSION 0x00000000
+
/**
* Function called by the transport for each received message.
*
* @param cls closure
- * @param latency estimated latency for communicating with the
- * given peer
* @param peer (claimed) identity of the other peer
* @param message the message
+ * @param ats performance data
+ * @param ats_count number of entries in ats
*/
typedef void (*GNUNET_TRANSPORT_ReceiveCallback) (void *cls,
- struct GNUNET_TIME_Relative
- latency,
const struct
GNUNET_PeerIdentity * peer,
const struct
*
* @param cls closure
* @param peer the peer that connected
- * @param latency current latency of the connection
+ * @param ats performance data
+ * @param ats_count number of entries in ats (excluding 0-termination)
*/
-typedef void
- (*GNUNET_TRANSPORT_NotifyConnect) (void *cls,
- const struct GNUNET_PeerIdentity * peer,
- struct GNUNET_TIME_Relative latency);
+typedef void (*GNUNET_TRANSPORT_NotifyConnect) (void *cls,
+ const struct GNUNET_PeerIdentity
+ * peer);
/**
* Function called to notify transport users that another
* @param cls closure
* @param peer the peer that disconnected
*/
-typedef void
- (*GNUNET_TRANSPORT_NotifyDisconnect) (void *cls,
- const struct GNUNET_PeerIdentity *
- peer);
+typedef void (*GNUNET_TRANSPORT_NotifyDisconnect) (void *cls,
+ const struct
+ GNUNET_PeerIdentity * peer);
+
+
+/**
+ * Function to call with result of the try connect request.
+ *
+ *
+ * @param cls closure
+ * @param result GNUNET_OK if message was transmitted to transport service
+ * GNUNET_SYSERR if message was not transmitted to transport service
+ */
+typedef void (*GNUNET_TRANSPORT_TryConnectCallback) (void *cls,
+ const int result);
-typedef void
-(*GNUNET_TRANSPORT_AddressLookUpCallback) (void *cls,
- const char *address);
+/**
+ * Function to call with a textual representation of an address.
+ * This function will be called several times with different possible
+ * textual representations, and a last time with NULL to signal the end
+ * of the iteration.
+ *
+ * @param cls closure
+ * @param address NULL on error or end of iteration,
+ * otherwise 0-terminated printable UTF-8 string
+ */
+typedef void (*GNUNET_TRANSPORT_AddressToStringCallback) (void *cls,
+ const char *address);
+
+
+/**
+ * Function to call with a binary format of an address
+ *
+ * @param cls closure
+ * @param peer peer this update is about (never NULL)
+ * @param address address, NULL for disconnect notification in monitor mode
+ */
+typedef void (*GNUNET_TRANSPORT_PeerIterateCallback) (void *cls,
+ const struct
+ GNUNET_PeerIdentity *
+ peer,
+ const struct
+ GNUNET_HELLO_Address *
+ address);
+
/**
* 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 nd function to call on disconnect events
+ * @param rec receive function to call, or NULL
+ * @param nc function to call on connect events, or NULL
+ * @param nd function to call on disconnect events, or NULL
+ * @return NULL on error
*/
-struct GNUNET_TRANSPORT_Handle *GNUNET_TRANSPORT_connect (struct
- GNUNET_SCHEDULER_Handle
- *sched,
- const struct
- GNUNET_CONFIGURATION_Handle
- *cfg, void *cls,
- GNUNET_TRANSPORT_ReceiveCallback
- rec,
- GNUNET_TRANSPORT_NotifyConnect
- nc,
- GNUNET_TRANSPORT_NotifyDisconnect
- nd);
+struct GNUNET_TRANSPORT_Handle *
+GNUNET_TRANSPORT_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ const struct GNUNET_PeerIdentity *self, void *cls,
+ GNUNET_TRANSPORT_ReceiveCallback rec,
+ GNUNET_TRANSPORT_NotifyConnect nc,
+ GNUNET_TRANSPORT_NotifyDisconnect nd);
/**
* Disconnect from the transport service.
+ *
+ * @param handle handle returned from connect
*/
-void GNUNET_TRANSPORT_disconnect (struct GNUNET_TRANSPORT_Handle *handle);
+void
+GNUNET_TRANSPORT_disconnect (struct GNUNET_TRANSPORT_Handle *handle);
/**
- * Set the share of incoming/outgoing bandwidth for the given
- * peer to the specified amount.
+ * Opaque handle for a transmission-ready request.
+ */
+struct GNUNET_TRANSPORT_TryConnectHandle;
+
+
+/**
+ * Ask the transport service to establish a connection to
+ * the given peer.
*
* @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 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
- * either with reason "TIMEOUT" or with reason "PREREQ_DONE"
- * @param cont_cls closure for continuation
+ * @param target who we should try to connect to
+ * @param cb callback to be called when request was transmitted to transport
+ * service
+ * @param cb_cls closure for the callback
+ * @return a GNUNET_TRANSPORT_TryConnectHandle handle or
+ * NULL on failure (cb will not be called)
+ */
+struct GNUNET_TRANSPORT_TryConnectHandle *
+GNUNET_TRANSPORT_try_connect (struct GNUNET_TRANSPORT_Handle *handle,
+ const struct GNUNET_PeerIdentity *target,
+ GNUNET_TRANSPORT_TryConnectCallback cb,
+ void *cb_cls);
+
+
+/**
+ * Cancel the request to transport to try a connect
+ * Callback will not be called
+ *
+ * @param tch GNUNET_TRANSPORT_TryConnectHandle handle to cancel
*/
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_TIME_Relative timeout,
- GNUNET_SCHEDULER_Task cont, void *cont_cls);
+GNUNET_TRANSPORT_try_connect_cancel (struct GNUNET_TRANSPORT_TryConnectHandle *tch);
/**
/**
* Check if we could queue a message of the given size for
- * transmission. The transport service will take both its
- * internal buffers and bandwidth limits imposed by the
- * other peer into consideration when answering this query.
+ * transmission. The transport service will take both its internal
+ * buffers and bandwidth limits imposed by the other peer into
+ * consideration when answering this query.
*
* @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 priority how important is the message? @deprecated - remove?
* @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
* non-NULL if the notify callback was queued (can be used to cancel
* using GNUNET_TRANSPORT_notify_transmit_ready_cancel)
*/
-struct GNUNET_TRANSPORT_TransmitHandle
- *GNUNET_TRANSPORT_notify_transmit_ready (struct GNUNET_TRANSPORT_Handle
- *handle,
- const struct GNUNET_PeerIdentity
- *target, size_t size,
- unsigned int priority,
- struct GNUNET_TIME_Relative
- timeout,
- GNUNET_CONNECTION_TransmitReadyNotify
- notify, void *notify_cls);
+struct GNUNET_TRANSPORT_TransmitHandle *
+GNUNET_TRANSPORT_notify_transmit_ready (struct GNUNET_TRANSPORT_Handle *handle,
+ const struct GNUNET_PeerIdentity
+ *target, size_t size, uint32_t priority,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_CONNECTION_TransmitReadyNotify
+ notify, void *notify_cls);
/**
- * Cancel the specified transmission-ready
- * notification.
+ * Cancel the specified transmission-ready notification.
+ *
+ * @param th handle of the transmission notification request to cancel
*/
void
GNUNET_TRANSPORT_notify_transmit_ready_cancel (struct
GNUNET_TRANSPORT_TransmitHandle
- *h);
+ *th);
+
/**
- * Obtain the HELLO message for this peer.
+ * Function called whenever there is an update to the
+ * HELLO of this peer.
+ *
+ * @param cls closure
+ * @param hello our updated HELLO
+ */
+typedef void (*GNUNET_TRANSPORT_HelloUpdateCallback) (void *cls,
+ const struct
+ GNUNET_MessageHeader *
+ hello);
+
+
+/**
+ * Handle to cancel a 'GNUNET_TRANSPORT_get_hello' operation.
+ */
+struct GNUNET_TRANSPORT_GetHelloHandle;
+
+
+/**
+ * Checks if a given peer is connected to us
*
* @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).
- * cost estimate will be 0.
- * @param rec_cls closure for rec
+ * @param peer the peer to check
+ * @return #GNUNET_YES (connected) or #GNUNET_NO (disconnected)
+ */
+int
+GNUNET_TRANSPORT_check_peer_connected (struct GNUNET_TRANSPORT_Handle *handle,
+ const struct GNUNET_PeerIdentity *peer);
+
+
+/**
+ * Set transport metrics for a peer and a direction
+ *
+ * @param handle transport handle
+ * @param peer the peer to set the metric for
+ * @param inbound set inbound direction (GNUNET_YES or GNUNET_NO)
+ * @param outbound set outbound direction (GNUNET_YES or GNUNET_NO)
+ * @param ats the metric as ATS information
+ * @param ats_count the number of metrics
+ *
+ * Supported ATS values:
+ * GNUNET_ATS_QUALITY_NET_DELAY (value in ms)
+ * GNUNET_ATS_QUALITY_NET_DISTANCE (value in count(hops))
+ *
+ * Example
+ * To enforce a delay of 10 ms for peer p1 in sending direction use:
+ *
+ * struct GNUNET_ATS_Information ats;
+ * ats.type = ntohl (GNUNET_ATS_QUALITY_NET_DELAY);
+ * ats.value = ntohl (10);
+ * GNUNET_TRANSPORT_set_traffic_metric (th, p1, TM_SEND, &ats, 1);
+ *
+ * Note:
+ * Delay restrictions in receiving direction will be enforced with
+ * 1 message delay.
*/
void
+GNUNET_TRANSPORT_set_traffic_metric (struct GNUNET_TRANSPORT_Handle *handle,
+ const struct GNUNET_PeerIdentity *peer,
+ int inbound,
+ int outbound,
+ const struct GNUNET_ATS_Information *ats,
+ size_t ats_count);
+
+
+/**
+ * Obtain updates on changes to the HELLO message for this peer. The callback
+ * given in this function is never called synchronously.
+ *
+ * @param handle connection to transport service
+ * @param rec function to call with the HELLO
+ * @param rec_cls closure for rec
+ * @return handle to cancel the operation
+ */
+struct GNUNET_TRANSPORT_GetHelloHandle *
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);
+/**
+ * Stop receiving updates about changes to our HELLO message.
+ *
+ * @param ghh handle to cancel
+ */
+void
+GNUNET_TRANSPORT_get_hello_cancel (struct GNUNET_TRANSPORT_GetHelloHandle *ghh);
+
+
/**
* Offer the transport service the HELLO of another peer. Note that
* the transport service may just ignore this message if the HELLO is
*
* @param handle connection to transport service
* @param hello the hello message
+ * @param cont continuation to call when HELLO has been sent,
+ * tc reason GNUNET_SCHEDULER_REASON_TIMEOUT for fail
+ * tc reasong GNUNET_SCHEDULER_REASON_READ_READY for success
+ * @param cls closure for continuation
+ * @return a GNUNET_TRANSPORT_OfferHelloHandle handle or NULL on failure,
+ * in case of failure cont will not be called
+ *
*/
-void
+struct GNUNET_TRANSPORT_OfferHelloHandle *
GNUNET_TRANSPORT_offer_hello (struct GNUNET_TRANSPORT_Handle *handle,
- const struct GNUNET_MessageHeader *hello);
+ const struct GNUNET_MessageHeader *hello,
+ GNUNET_SCHEDULER_Task cont, void *cls);
+
/**
- * Obtain a AddressLookupMessage from a client and return to client all the host addresses of other peers.
+ * Cancel the request to transport to offer the HELLO message
*
- * @param handle connection to transport service
- * @param addLUmsg the address-lookup message
+ * @param ohh the GNUNET_TRANSPORT_OfferHelloHandle to cancel
*/
void
-GNUNET_TRANSPORT_address_lookup (struct GNUNET_TRANSPORT_Handle *handle,
- const char * address,
- size_t addressLen,
- const char * nameTrans,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_TRANSPORT_AddressLookUpCallback aluc,
- void *aluc_cls);
+GNUNET_TRANSPORT_offer_hello_cancel (struct GNUNET_TRANSPORT_OfferHelloHandle *ohh);
+
+
+/**
+ * Handle to cancel a pending address lookup.
+ */
+struct GNUNET_TRANSPORT_AddressToStringContext;
+
+
+/**
+ * Convert a binary address into a human readable address.
+ *
+ * @param cfg configuration to use
+ * @param address address to convert (binary format)
+ * @param numeric should (IP) addresses be displayed in numeric form
+ * (otherwise do reverse DNS lookup)
+ * @param timeout how long is the lookup allowed to take at most
+ * @param aluc function to call with the results
+ * @param aluc_cls closure for aluc
+ * @return handle to cancel the operation, NULL on error
+ */
+struct GNUNET_TRANSPORT_AddressToStringContext *
+GNUNET_TRANSPORT_address_to_string (const struct GNUNET_CONFIGURATION_Handle
+ *cfg,
+ const struct GNUNET_HELLO_Address *address,
+ int numeric,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_TRANSPORT_AddressToStringCallback
+ aluc, void *aluc_cls);
+
+
+/**
+ * Cancel request for address conversion.
+ *
+ * @param alc handle for the request to cancel
+ */
+void
+GNUNET_TRANSPORT_address_to_string_cancel (struct
+ GNUNET_TRANSPORT_AddressToStringContext
+ *alc);
+
+
+/**
+ * Return all the known addresses for a specific peer or all peers.
+ * Returns continuously all address if one_shot is set to GNUNET_NO
+ *
+ * CHANGE: Returns the address(es) that we are currently using for this
+ * peer. Upon completion, the 'AddressLookUpCallback' is called one more
+ * time with 'NULL' for the address and the peer. After this, the operation must no
+ * longer be explicitly cancelled.
+ *
+ * @param cfg configuration to use
+ * @param peer peer identity to look up the addresses of, CHANGE: allow NULL for all (connected) peers
+ * @param one_shot GNUNET_YES to return the current state and then end (with NULL+NULL),
+ * GNUNET_NO to monitor the set of addresses used (continuously, must be explicitly canceled, NOT implemented yet!)
+ * @param timeout how long is the lookup allowed to take at most
+ * @param peer_address_callback function to call with the results
+ * @param peer_address_callback_cls closure for peer_address_callback
+ */
+struct GNUNET_TRANSPORT_PeerIterateContext *
+GNUNET_TRANSPORT_peer_get_active_addresses (const struct
+ GNUNET_CONFIGURATION_Handle *cfg,
+ const struct GNUNET_PeerIdentity
+ *peer, int one_shot,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_TRANSPORT_PeerIterateCallback
+ peer_address_callback,
+ void *peer_address_callback_cls);
+
+
+/**
+ * Cancel request for peer lookup.
+ *
+ * @param alc handle for the request to cancel
+ */
+void
+GNUNET_TRANSPORT_peer_get_active_addresses_cancel (struct
+ GNUNET_TRANSPORT_PeerIterateContext
+ *alc);
+
+
+/**
+ * Handle for blacklisting peers.
+ */
+struct GNUNET_TRANSPORT_Blacklist;
+
+
+/**
+ * Function that decides if a connection is acceptable or not.
+ *
+ * @param cls closure
+ * @param pid peer to approve or disapproave
+ * @return GNUNET_OK if the connection is allowed, GNUNET_SYSERR if not
+ */
+typedef int (*GNUNET_TRANSPORT_BlacklistCallback) (void *cls,
+ const struct
+ GNUNET_PeerIdentity * pid);
+
+
+/**
+ * Install a blacklist callback. The service will be queried for all
+ * existing connections as well as any fresh connections to check if
+ * they are permitted. If the blacklisting callback is unregistered,
+ * all hosts that were denied in the past will automatically be
+ * whitelisted again. Cancelling the blacklist handle is also the
+ * only way to re-enable connections from peers that were previously
+ * blacklisted.
+ *
+ * @param cfg configuration to use
+ * @param cb callback to invoke to check if connections are allowed
+ * @param cb_cls closure for cb
+ * @return NULL on error, otherwise handle for cancellation
+ */
+struct GNUNET_TRANSPORT_Blacklist *
+GNUNET_TRANSPORT_blacklist (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ GNUNET_TRANSPORT_BlacklistCallback cb,
+ void *cb_cls);
+
+
+/**
+ * Abort the blacklist. Note that this function is the only way for
+ * removing a peer from the blacklist.
+ *
+ * @param br handle of the request that is to be cancelled
+ */
+void
+GNUNET_TRANSPORT_blacklist_cancel (struct GNUNET_TRANSPORT_Blacklist *br);
/* ifndef GNUNET_TRANSPORT_SERVICE_H */
#endif
/* end of gnunet_transport_service.h */
-
-
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