/*
- This file is part of GNUnet.
- (C) 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 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 include/gnunet_ats_service.h
- * @brief automatic transport selection and outbound bandwidth determination
+ This file is part of GNUnet.
+ Copyright (C) 2010-2015 GNUnet e.V.
+
+ GNUnet is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License,
+ 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
+ Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ SPDX-License-Identifier: AGPL3.0-or-later
+ */
+/**
+ * @file
+ * Automatic transport selection and outbound bandwidth determination
+ *
* @author Christian Grothoff
* @author Matthias Wachs
+ *
+ * @defgroup ats ATS service
+ * Automatic Transport Selection and outbound bandwidth determination
+ *
+ * @see [Documentation](https://gnunet.org/ats-subsystem)
+ *
+ * @{
*/
#ifndef GNUNET_ATS_SERVICE_H
#define GNUNET_ATS_SERVICE_H
#include "gnunet_hello_lib.h"
-enum GNUNET_ATS_Network_Type
-{
- GNUNET_ATS_NET_UNSPECIFIED = 0,
- GNUNET_ATS_NET_LOOPBACK = 1,
- GNUNET_ATS_NET_LAN = 2,
- GNUNET_ATS_NET_WAN = 3,
- GNUNET_ATS_NET_WLAN = 4,
-};
+/**
+ * Default bandwidth assigned to a network : 64 KB/s
+ */
+#define GNUNET_ATS_DefaultBandwidth 65536
/**
- * Enum defining all known property types for ATS Enum values are used
- * in the GNUNET_ATS_Information struct as
- * (key,value)-pairs.
- *
- * Cost are always stored in uint32_t, so all units used to define costs
- * have to be normalized to fit in uint32_t [0 .. 4.294.967.295]
+ * Undefined value for an `enum GNUNET_ATS_Property`
+ */
+#define GNUNET_ATS_VALUE_UNDEFINED UINT32_MAX
+
+/**
+ * String representation for GNUNET_ATS_VALUE_UNDEFINED
*/
-enum GNUNET_ATS_Property
+#define GNUNET_ATS_VALUE_UNDEFINED_STR "undefined"
+
+/**
+ * Maximum bandwidth assigned to a network : 4095 MB/s
+ */
+#define GNUNET_ATS_MaxBandwidth UINT32_MAX
+
+/**
+ * Textual equivalent for GNUNET_ATS_MaxBandwidth
+ */
+#define GNUNET_ATS_MaxBandwidthString "unlimited"
+
+
+/**
+ * ATS performance characteristics for an address.
+ */
+struct GNUNET_ATS_Properties
{
/**
- * End of the array.
- * @deprecated
+ * Delay. Time between when the time packet is sent and the packet
+ * arrives. FOREVER if we did not measure yet.
*/
- GNUNET_ATS_ARRAY_TERMINATOR = 0,
+ struct GNUNET_TIME_Relative delay;
/**
- * Actual traffic on this connection from the other peer to this peer.
+ * Actual traffic on this connection from this peer to the other peer.
+ * Includes transport overhead.
*
* Unit: [bytes/second]
*/
- GNUNET_ATS_UTILIZATION_UP,
+ uint32_t utilization_out;
/**
- * Actual traffic on this connection from this peer to the other peer.
+ * Actual traffic on this connection from the other peer to this peer.
+ * Includes transport overhead.
*
* Unit: [bytes/second]
*/
- GNUNET_ATS_UTILIZATION_DOWN,
+ uint32_t utilization_in;
/**
- * Is this address located in WAN, LAN or a loopback address
- * Value is element of GNUNET_ATS_Network_Type
+ * Distance on network layer (required for distance-vector routing)
+ * in hops. Zero for direct connections (i.e. plain TCP/UDP).
*/
- GNUNET_ATS_NETWORK_TYPE,
+ unsigned int distance;
/**
- * Delay
- * Time between when the time packet is sent and the packet arrives
- *
- * Unit: [ms]
- *
- * Examples:
- *
- * LAN : 1
- * WLAN : 2
- * Dialup: 500
+ * Which network scope does the respective address belong to?
+ * This property does not change.
*/
- GNUNET_ATS_QUALITY_NET_DELAY,
+ enum GNUNET_NetworkType scope;
- /**
- * Distance on network layer (required for distance-vector routing).
- *
- * Unit: [DV-hops]
- */
- GNUNET_ATS_QUALITY_NET_DISTANCE,
+};
- /**
- * Network overhead on WAN (Wide-Area Network)
- *
- * How many bytes are sent on the WAN when 1 kilobyte (1024 bytes)
- * of application data is transmitted?
- * A factor used with connect cost, bandwidth cost and energy cost
- * to describe the overhead produced by the transport protocol
- *
- * Unit: [bytes/kb]
- *
- * Interpretation: less is better
- *
- * Examples:
- *
- * TCP/IPv4 over Ethernet: 1024 + 38 + 20 + 20 = 1102 [bytes/kb]
- * TCP/IPv6 over Ethernet: 1024 + 38 + 20 + 40 = 1122 [bytes/kb]
- * UDP/IPv4 over Ethernet: 1024 + 38 + 20 + 8 = 1090 [bytes/kb]
- * UDP/IPv6 over Ethernet: 1024 + 38 + 40 + 8 = 1110 [bytes/kb]
- */
- GNUNET_ATS_COST_WAN,
- /**
- * Network overhead on LAN (Local-Area Network)
- *
- * How many bytes are sent on the LAN when 1 kilobyte (1024 bytes)
- * of application data is transmitted?
- * A factor used with connect cost, bandwidth cost and energy cost
- * to describe the overhead produced by the transport protocol
- *
- * Unit: [bytes/kb]
- *
- * Interpretation: less is better
- *
- * Examples:
- *
- * TCP/IPv4 over Ethernet: 1024 + 38 + 20 + 20 = 1102 [bytes/kb]
- * TCP/IPv6 over Ethernet: 1024 + 38 + 20 + 40 = 1122 [bytes/kb]
- * UDP/IPv4 over Ethernet: 1024 + 38 + 20 + 8 = 1090 [bytes/kb]
- * UDP/IPv6 over Ethernet: 1024 + 38 + 40 + 8 = 1110 [bytes/kb]
- */
- GNUNET_ATS_COST_LAN,
+/**
+ * ATS performance characteristics for an address in
+ * network byte order (for IPC).
+ */
+struct GNUNET_ATS_PropertiesNBO
+{
/**
- * Network overhead on WLAN (Wireless Local Area Network)
- *
- * How many bytes are sent on the LAN when 1 kilobyte (1024 bytes)
- * of application data is transmitted?
- * A factor used with connect cost, bandwidth cost and energy cost
- * to describe the overhead produced by the transport protocol
- *
- * Unit: [bytes/kb]
- *
- * Interpretation: less is better
- *
- * Examples:
- *
- * TCP/IPv4 over Ethernet: 1024 + 38 + 20 + 20 = 1102 [bytes/kb]
- * TCP/IPv6 over Ethernet: 1024 + 38 + 20 + 40 = 1122 [bytes/kb]
- * UDP/IPv4 over Ethernet: 1024 + 38 + 20 + 8 = 1090 [bytes/kb]
- * UDP/IPv6 over Ethernet: 1024 + 38 + 40 + 8 = 1110 [bytes/kb]
- */
- GNUNET_ATS_COST_WLAN
- /* Cost related values */
- /* =================== */
- /**
- * Volume based cost in financial units to transmit data
- *
- * Note: This value is not bound to a specific currency or unit and only
- * used locally.
- * "cent" just refers the smallest amount of money in the respective
- * currency.
- *
- * Unit: [cent/MB]
- *
- * Interpretation: less is better
- *
- * Examples:
- * LAN: 0 [cent/MB]
- * 2G : 10 [cent/MB]
- */
- // GNUNET_ATS_COST_FINANCIAL_PER_VOLUME = 1,
- /**
- * Time based cost in financial units to transmit data
- *
- * Note: This value is not bound to a specific currency or unit and only
- * used locally.
- * "cent" just refers the smallest amount of money in the respective
- * currency.
- *
- * Unit: [cent/h]
- *
- * Interpretation: less is better
- *
- * Examples:
- * LAN : 0 [cent/h]
- * Dialup: 10 [cent/h]
- */
- // GNUNET_ATS_COST_FINANCIAL_PER_TIME = 2,
- /**
- * Computational costs
- *
- * Effort of preparing data to be sent with this transport
- * Includes encoding, encryption and conversion of data
- * Partial values can be summed up: c_sum = c_enc + c_enc + c_conv
- * Resulting values depend on local system properties, e.g. CPU
- *
- * Unit: [ms/GB]
- *
- * Interpretation: less is better
- *
- * Examples:
- *
- * HTTPS with AES CBC-256: 7,382
- * HTTPS with AES CBC-128: 5,279
- * HTTPS with RC4-1024: 2,652
- */
- // GNUNET_ATS_COST_COMPUTATIONAL = 3,
- /**
- * Energy consumption
- *
- * Energy consumption using this transport when sending with a certain
- * power at a certain bitrate. This is only an approximation based on:
- * Energy consumption E = P / D
- *
- * with:
- * Power P in Watt (J/s)
- * Datarate D in MBit/s
- *
- * Conversion between power P and dBm used by WLAN in radiotap's dBm TX power:
- *
- * Lp(dbm) = 10 log10 (P/ 1mW)
- *
- * => P = 1 mW * 10^(Lp(dbm)/10)
- *
- * Unit: [mJ/MB]
- *
- * Interpretation: less is better
- *
- * Examples:
- *
- * LAN: 0
- * WLAN: 89 (600 mW @ 802.11g /w 54 MBit/s)
- * Bluetooth: 267 (100 mW @ BT2.0 EDR /w 3 MBit/s)
- */
- // GNUNET_ATS_COST_ENERGY_CONSUMPTION = 4,
- /**
- * Connect cost
- * How many bytes are transmitted to initiate a new connection using
- * this transport?
- *
- * Unit: [bytes]
- *
- * Interpretation: less is better
- *
- * Examples:
- *
- * UDP (No connection) :
- * 0 bytes
- * TCP (TCP 3-Way handshake):
- * 220 bytes Ethernet, 172 bytes TCP/IP, 122 bytes TCP
- * HTTP (TCP + Header) :
- * 477 bytes Ethernet, 429 bytes TCP/IP, 374 bytes TCP, 278 bytes HTTP
- * HTTPS HTTP+TLS Handshake:
- * 2129 bytes Ethernet, 1975 bytes TCP/IP, 1755 bytes TCP, 1403 bytes HTTPS
- *
- * */
- // GNUNET_ATS_COST_CONNECT = 5,
- /**
- * Bandwidth cost
- *
- * How many bandwidth is available to consume?
- * Used to calculate which impact sending data with this transport has
- *
- * Unit: [kB/s]
- *
- * Interpretation: more is better
- *
- * Examples:
- * LAN: 12,800 (100 MBit/s)
- * WLAN: 6,912 (54 MBit/s)
- * Dial-up: 8 (64 Kbit/s)
- *
- */
- // GNUNET_ATS_COST_BANDWITH_AVAILABLE = 6,
- /**
- * Network overhead
- *
- * How many bytes are sent over the wire when 1 kilobyte (1024 bytes)
- * of application data is transmitted?
- * A factor used with connect cost, bandwidth cost and energy cost
- * to describe the overhead produced by the transport protocol
- *
- * Unit: [bytes/kb]
- *
- * Interpretation: less is better
- *
- * Examples:
- *
- * TCP/IPv4 over Ethernet: 1024 + 38 + 20 + 20 = 1102 [bytes/kb]
- * TCP/IPv6 over Ethernet: 1024 + 38 + 20 + 40 = 1122 [bytes/kb]
- * UDP/IPv4 over Ethernet: 1024 + 38 + 20 + 8 = 1090 [bytes/kb]
- * UDP/IPv6 over Ethernet: 1024 + 38 + 40 + 8 = 1110 [bytes/kb]
- */
- // GNUNET_ATS_COST_NETWORK_OVERHEAD = 7,
- /* Quality related values */
- /* ====================== */
- /* Physical layer quality properties */
- /**
- * Signal strength on physical layer
- *
- * Unit: [dBm]
- */
- // GNUNET_ATS_QUALITY_PHY_SIGNAL_STRENGTH = 1025,
- /**
- * Collision rate on physical layer
- *
- * Unit: [B/s]
- */
- // GNUNET_ATS_QUALITY_PHY_COLLISION_RATE = 1026,
- /**
- * Error rate on physical layer
- *
- * Unit: [B/s]
- */
- // GNUNET_ATS_QUALITY_PHY_ERROR_RATE = 1027,
- /**
- * Jitter
- * Time variations of the delay
- * 1st derivative of a delay function
- *
- * Unit: [ms]
- */
- // GNUNET_ATS_QUALITY_NET_JITTER = 1029,
- /**
- * Error rate on network layer
- *
- * Unit: [B/s]
- *
- * Examples:
- *
- * LAN : 0
- * WLAN : 400
- * Bluetooth : 100
- * Note: This numbers are just assumptions as an example, not
- * measured or somehow determined
- */
- // GNUNET_ATS_QUALITY_NET_ERRORRATE = 1030,
- /**
- * Drop rate on network layer
- * Bytes actively dismissed by a network component during transmission
- * Reasons for dropped data can be full queues, congestion, quota violations...
- *
- * Unit: [B/s]
- *
- * Examples:
+ * Actual traffic on this connection from this peer to the other peer.
+ * Includes transport overhead.
*
- * LAN : 0
- * WLAN : 400
- * Bluetooth : 100
- * Note: This numbers are just assumptions as an example, not
- * measured or somehow determined
+ * Unit: [bytes/second]
*/
- // GNUNET_ATS_QUALITY_NET_DROPRATE = 1031,
+ uint32_t utilization_out GNUNET_PACKED;
+
/**
- * Loss rate on network layer
- * Bytes lost during transmission
- * Reasons can be collisions, ...
- *
- * Unit: [B/s]
- *
- * Examples:
+ * Actual traffic on this connection from the other peer to this peer.
+ * Includes transport overhead.
*
- * LAN : 0
- * WLAN : 40
- * Bluetooth : 10
- * Note: This numbers are just assumptions as an example, not measured
- * or somehow determined
+ * Unit: [bytes/second]
*/
- // GNUNET_ATS_QUALITY_NET_LOSSRATE = 1032,
+ uint32_t utilization_in GNUNET_PACKED;
+
/**
- * Throughput on network layer
- *
- * Unit: [kB/s]
- *
- * Examples:
- *
- * LAN : 3400
- * WLAN : 1200
- * Dialup: 4
- *
+ * Which network scope does the respective address belong to?
+ * This property does not change.
*/
- // GNUNET_ATS_QUALITY_NET_THROUGHPUT = 1033,
- /* Availability related values */
- /* =========================== */
+ uint32_t scope GNUNET_PACKED;
+
/**
- * Is a peer reachable?
+ * Distance on network layer (required for distance-vector routing)
+ * in hops. Zero for direct connections (i.e. plain TCP/UDP).
*/
- // GNUNET_ATS_AVAILABILITY_REACHABLE = 2048,
+ uint32_t distance GNUNET_PACKED;
+
/**
- * Is there a connection established to a peer using this transport
+ * Delay. Time between when the time packet is sent and the packet
+ * arrives. FOREVER if we did not measure yet.
*/
- // GNUNET_ATS_AVAILABILITY_CONNECTED = 2049
+ struct GNUNET_TIME_RelativeNBO delay;
+
};
+
+
+/* ********************* LAN Characterization library ************************ */
+/* Note: these functions do not really communicate with the ATS service */
+
+
/**
- * Number of ATS quality properties
+ * Convert ATS properties from host to network byte order.
+ *
+ * @param nbo[OUT] value written
+ * @param hbo value read
*/
-#define GNUNET_ATS_QualityPropertiesCount 2
+void
+GNUNET_ATS_properties_hton (struct GNUNET_ATS_PropertiesNBO *nbo,
+ const struct GNUNET_ATS_Properties *hbo);
+
/**
- * ATS quality properties as array initializer
+ * Convert ATS properties from network to host byte order.
+ *
+ * @param hbo[OUT] value written
+ * @param nbo value read
*/
-#define GNUNET_ATS_QualityProperties {GNUNET_ATS_QUALITY_NET_DELAY, GNUNET_ATS_QUALITY_NET_DISTANCE}
+void
+GNUNET_ATS_properties_ntoh (struct GNUNET_ATS_Properties *hbo,
+ const struct GNUNET_ATS_PropertiesNBO *nbo);
-GNUNET_NETWORK_STRUCT_BEGIN
+
+/* ********************Connection Suggestion API ***************************** */
+
+/**
+ * Handle to the ATS subsystem for making suggestions about
+ * connections the peer would like to have.
+ */
+struct GNUNET_ATS_ConnectivityHandle;
/**
- * struct used to communicate the transport's properties like cost and
- * quality of service as well as high-level constraints on resource
- * consumption.
+ * Handle for address suggestion requests.
+ */
+struct GNUNET_ATS_ConnectivitySuggestHandle;
+
+
+/**
+ * Initialize the ATS connectivity suggestion client handle.
*
- * +---+
- * +-----------+ Constraints | | Plugin properties +---------+
- * | Highlevel |------------> |ATS| <------------------|Transport|
- * | Component | ATS struct | | ATS struct | Plugin |
- * +-----------+ | | +---------+
- * +---+
+ * @param cfg configuration to use
+ * @return ats connectivity handle, NULL on error
+ */
+struct GNUNET_ATS_ConnectivityHandle *
+GNUNET_ATS_connectivity_init (const struct GNUNET_CONFIGURATION_Handle *cfg);
+
+
+/**
+ * Shutdown ATS connectivity suggestion client.
*
- * This structure will be used by transport plugins to communicate
- * costs to ATS or by higher level components to tell ATS their
- * constraints. Always a pair of (GNUNET_ATS_Property,
- * uint32_t value). Value is always uint32_t, so all units used to
- * define costs have to be normalized to fit uint32_t.
+ * @param ch handle to destroy
*/
-struct GNUNET_ATS_Information
-{
- /**
- * ATS property type, in network byte order.
- */
- uint32_t type GNUNET_PACKED;
+void
+GNUNET_ATS_connectivity_done (struct GNUNET_ATS_ConnectivityHandle *ch);
- /**
- * ATS property value, in network byte order.
- */
- uint32_t value GNUNET_PACKED;
-};
-GNUNET_NETWORK_STRUCT_END
+
+/**
+ * We would like to establish a new connection with a peer. ATS
+ * should suggest a good address to begin with.
+ *
+ * @param ch handle
+ * @param peer identity of the peer we need an address for
+ * @param strength how urgent is the need for such a suggestion
+ * @return suggestion handle, NULL if request is already pending
+ */
+struct GNUNET_ATS_ConnectivitySuggestHandle *
+GNUNET_ATS_connectivity_suggest (struct GNUNET_ATS_ConnectivityHandle *ch,
+ const struct GNUNET_PeerIdentity *peer,
+ uint32_t strength);
+
+
+/**
+ * We no longer care about being connected to a peer.
+ *
+ * @param sh handle
+ */
+void
+GNUNET_ATS_connectivity_suggest_cancel (struct GNUNET_ATS_ConnectivitySuggestHandle *sh);
/* ******************************** Scheduling API ***************************** */
*/
struct GNUNET_ATS_SchedulingHandle;
-
/**
* Opaque session handle, defined by plugins. Contents not known to ATS.
*/
-struct Session;
+struct GNUNET_ATS_Session;
/**
* Signature of a function called by ATS with the current bandwidth
- * and address preferences as determined by ATS.
+ * and address preferences as determined by ATS. If our connection
+ * to ATS dies and thus all suggestions become invalid, this function
+ * is called ONCE with all arguments (except @a cls) being NULL/0.
*
* @param cls closure
- * @param address suggested address (including peer identity of the peer)
- * @param session session to use
- * @param bandwidth_out assigned outbound bandwidth for the connection
- * @param bandwidth_in assigned inbound bandwidth for the connection
- * @param ats performance data for the address (as far as known)
- * @param ats_count number of performance records in 'ats'
- */
-typedef void (*GNUNET_ATS_AddressSuggestionCallback) (void *cls,
- const struct
- GNUNET_HELLO_Address *
- address,
- struct Session * session,
- struct
- GNUNET_BANDWIDTH_Value32NBO
- bandwidth_out,
- struct
- GNUNET_BANDWIDTH_Value32NBO
- bandwidth_in,
- const struct
- GNUNET_ATS_Information *
- ats, uint32_t ats_count);
-
-
-/**
- * Initialize the ATS subsystem.
+ * @param peer for which we suggest an address, NULL if ATS connection died
+ * @param address suggested address (including peer identity of the peer),
+ * may be NULL to signal disconnect from peer
+ * @param session session to use, NULL to establish a new outgoing session
+ * @param bandwidth_out assigned outbound bandwidth for the connection,
+ * 0 to signal disconnect
+ * @param bandwidth_in assigned inbound bandwidth for the connection,
+ * 0 to signal disconnect
+ */
+typedef void
+(*GNUNET_ATS_AddressSuggestionCallback) (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_HELLO_Address *address,
+ struct GNUNET_ATS_Session *session,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in);
+
+
+/**
+ * Initialize the ATS scheduling subsystem.
*
* @param cfg configuration to use
* @param suggest_cb notification to call whenever the suggestation changed
- * @param suggest_cb_cls closure for 'suggest_cb'
+ * @param suggest_cb_cls closure for @a suggest_cb
* @return ats context
*/
struct GNUNET_ATS_SchedulingHandle *
/**
- * We would like to establish a new connection with a peer. ATS
- * should suggest a good address to begin with.
+ * Handle used within ATS to track an address.
+ */
+struct GNUNET_ATS_AddressRecord;
+
+
+/**
+ * We have a new address ATS should know. Addresses have to be added with this
+ * function before they can be: updated, set in use and destroyed
*
* @param sh handle
- * @param peer identity of the peer we need an address for
+ * @param address the address
+ * @param session session handle (if available, i.e. for incoming connections)
+ * @param prop performance data for the address
+ * @return handle to the address representation inside ATS, NULL
+ * on error (i.e. ATS knows this exact address already, or
+ * address is invalid)
*/
-void
-GNUNET_ATS_suggest_address (struct GNUNET_ATS_SchedulingHandle *sh,
- const struct GNUNET_PeerIdentity *peer);
+struct GNUNET_ATS_AddressRecord *
+GNUNET_ATS_address_add (struct GNUNET_ATS_SchedulingHandle *sh,
+ const struct GNUNET_HELLO_Address *address,
+ struct GNUNET_ATS_Session *session,
+ const struct GNUNET_ATS_Properties *prop);
/**
- * We want to cancel ATS suggesting addresses for a peer.
+ * An address was used to initiate a session.
*
- * @param sh handle
- * @param peer identity of the peer
+ * @param ar address record to update information for
+ * @param session session handle
*/
void
-GNUNET_ATS_suggest_address_cancel (struct GNUNET_ATS_SchedulingHandle *sh,
- const struct GNUNET_PeerIdentity *peer);
+GNUNET_ATS_address_add_session (struct GNUNET_ATS_AddressRecord *ar,
+ struct GNUNET_ATS_Session *session);
/**
- * Returns where the address is located: LAN or WAN or ...
- * @param addr address
- * @param addrlen address length
- * @return location as GNUNET_ATS_Information
+ * A @a session was destroyed, disassociate it from the given address
+ * record. If this was an incoming addess, destroys the address as
+ * well.
+ *
+ * @param ar address record to update information for
+ * @param session session handle
+ * @return #GNUNET_YES if the @a ar was destroyed because
+ * it was an incoming address,
+ * #GNUNET_NO if the @ar was kept because we can
+ * use it still to establish a new session
*/
-struct GNUNET_ATS_Information
-GNUNET_ATS_address_get_type (struct GNUNET_ATS_SchedulingHandle *sh,
- const struct sockaddr * addr,
- socklen_t addrlen);
+int
+GNUNET_ATS_address_del_session (struct GNUNET_ATS_AddressRecord *ar,
+ struct GNUNET_ATS_Session *session);
/**
* We have updated performance statistics for a given address. Note
* that this function can be called for addresses that are currently
* in use as well as addresses that are valid but not actively in use.
- * Furthermore, the peer may not even be connected to us right now (in
- * which case the call may be ignored or the information may be stored
- * for later use). Update bandwidth assignments.
+ * Furthermore, the peer may not even be connected to us right now (@a
+ * session value of NULL used to signal disconnect, or somehow we
+ * otherwise got updated on @a ats information). Based on the
+ * information provided, ATS may update bandwidth assignments and
+ * suggest to switch addresses.
*
- * @param sh handle
- * @param address updated address
- * @param session session handle (if available)
- * @param ats performance data for the address
- * @param ats_count number of performance records in 'ats'
+ * @param ar address record to update information for
+ * @param prop performance data for the address
*/
void
-GNUNET_ATS_address_update (struct GNUNET_ATS_SchedulingHandle *sh,
- const struct GNUNET_HELLO_Address *address,
- struct Session *session,
- const struct GNUNET_ATS_Information *ats,
- uint32_t ats_count);
+GNUNET_ATS_address_update (struct GNUNET_ATS_AddressRecord *ar,
+ const struct GNUNET_ATS_Properties *prop);
/**
- * An address is now in use or not used any more.
+ * An address got destroyed, stop using it as a valid address.
*
- * @param sh handle
- * @param address the address
- * @param session session handle
- * @param in_use GNUNET_YES if this address is now used, GNUNET_NO
- * if address is not used any more
+ * @param ar address record to destroy, it's validation has
+ * expired and ATS may no longer use it
*/
void
-GNUNET_ATS_address_in_use (struct GNUNET_ATS_SchedulingHandle *sh,
- const struct GNUNET_HELLO_Address *address,
- struct Session *session, int in_use);
+GNUNET_ATS_address_destroy (struct GNUNET_ATS_AddressRecord *ar);
-/**
- * A session got destroyed, stop including it as a valid address.
- *
- * @param sh handle
- * @param address the address
- * @param session session handle that is no longer valid (if available)
- */
-void
-GNUNET_ATS_address_destroyed (struct GNUNET_ATS_SchedulingHandle *sh,
- const struct GNUNET_HELLO_Address *address,
- struct Session *session);
/* ******************************** Performance API ***************************** */
*/
struct GNUNET_ATS_PerformanceHandle;
-
/**
- * Signature of a function that is called with QoS information about a peer.
+ * Signature of a function that is called with QoS information about an address.
*
* @param cls closure
- * @param address the address
+ * @param address the address, NULL if ATS service was disconnected or
+ * when the iteration is completed in the case of
+ * #GNUNET_ATS_performance_list_addresses()
+ * @param address_active #GNUNET_YES if this address is actively used
+ * to maintain a connection to a peer;
+ * #GNUNET_NO if the address is not actively used;
+ * #GNUNET_SYSERR if this address is no longer available for ATS
* @param bandwidth_out assigned outbound bandwidth for the connection
* @param bandwidth_in assigned inbound bandwidth for the connection
- * @param ats performance data for the address (as far as known)
- * @param ats_count number of performance records in 'ats'
+ * @param prop performance data for the address
+ */
+typedef void
+(*GNUNET_ATS_AddressInformationCallback) (void *cls,
+ const struct GNUNET_HELLO_Address *address,
+ int address_active,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in,
+ const struct GNUNET_ATS_Properties *prop);
+
+
+/**
+ * Handle for an address listing operation
*/
-typedef void (*GNUNET_ATS_PeerInformationCallback) (void *cls,
- const struct
- GNUNET_HELLO_Address *
- address,
- struct
- GNUNET_BANDWIDTH_Value32NBO
- bandwidth_out,
- struct
- GNUNET_BANDWIDTH_Value32NBO
- bandwidth_in,
- const struct
- GNUNET_ATS_Information *
- ats, uint32_t ats_count);
+struct GNUNET_ATS_AddressListHandle;
/**
* Get handle to access performance API of the ATS subsystem.
*
* @param cfg configuration to use
- * @param infocb function to call on performance changes, can be NULL
- * @param infocb_cls closure for infocb
+ * @param addr_info_cb callback called when performance characteristics for
+ * an address change
+ * @param addr_info_cb_cls closure for @a addr_info_cb
* @return ats performance context
*/
struct GNUNET_ATS_PerformanceHandle *
GNUNET_ATS_performance_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
- GNUNET_ATS_PeerInformationCallback infocb,
- void *infocb_cls);
+ GNUNET_ATS_AddressInformationCallback addr_info_cb,
+ void *addr_info_cb_cls);
+
+
+/**
+ * Get information about addresses known to the ATS subsystem.
+ *
+ * @param ph the performance handle to use
+ * @param peer peer idm can be NULL for all peers
+ * @param all #GNUNET_YES to get information about all addresses or #GNUNET_NO to
+ * get only address currently used
+ * @param infocb callback to call with the addresses,
+ * will callback with address == NULL when done
+ * @param infocb_cls closure for @a infocb
+ * @return handle to abort the operation
+ */
+struct GNUNET_ATS_AddressListHandle *
+GNUNET_ATS_performance_list_addresses (struct GNUNET_ATS_PerformanceHandle *ph,
+ const struct GNUNET_PeerIdentity *peer,
+ int all,
+ GNUNET_ATS_AddressInformationCallback infocb,
+ void *infocb_cls);
+
+
+/**
+ * Cancel a pending address listing operation
+ *
+ * @param alh the `struct GNUNET_ATS_AddressListHandle` handle to cancel
+ */
+void
+GNUNET_ATS_performance_list_addresses_cancel (struct GNUNET_ATS_AddressListHandle *alh);
/**
* @param res_delay if the reservation could not be satisfied (amount was 0), how
* long should the client wait until re-trying?
*/
-typedef void (*GNUNET_ATS_ReservationCallback) (void *cls,
- const struct GNUNET_PeerIdentity
- * peer, int32_t amount,
- struct GNUNET_TIME_Relative
- res_delay);
-
+typedef void
+(*GNUNET_ATS_ReservationCallback) (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ int32_t amount,
+ struct GNUNET_TIME_Relative res_delay);
/**
* @param amount reserve N bytes for receiving, negative
* amounts can be used to undo a (recent) reservation;
* @param rcb function to call with the resulting reservation information
- * @param rcb_cls closure for info
+ * @param rcb_cls closure for @a rcb
* @return NULL on error
* @deprecated will be replaced soon
*/
struct GNUNET_ATS_ReservationContext *
GNUNET_ATS_reserve_bandwidth (struct GNUNET_ATS_PerformanceHandle *ph,
- const struct GNUNET_PeerIdentity *peer,
- int32_t amount,
- GNUNET_ATS_ReservationCallback rcb,
- void *rcb_cls);
+ const struct GNUNET_PeerIdentity *peer,
+ int32_t amount,
+ GNUNET_ATS_ReservationCallback rcb,
+ void *rcb_cls);
/**
GNUNET_ATS_reserve_bandwidth_cancel (struct GNUNET_ATS_ReservationContext *rc);
+/**
+ * ATS preference types as array initializer
+ */
+#define GNUNET_ATS_PreferenceType {GNUNET_ATS_PREFERENCE_BANDWIDTH, GNUNET_ATS_PREFERENCE_LATENCY, GNUNET_ATS_PREFERENCE_END}
+
+/**
+ * ATS preference types as string array initializer
+ */
+#define GNUNET_ATS_PreferenceTypeString {"BANDWIDTH", "LATENCY", "END" }
/**
* Enum defining all known preference categories.
enum GNUNET_ATS_PreferenceKind
{
- /**
- * End of preference list.
- */
- GNUNET_ATS_PREFERENCE_END = 0,
-
/**
* Change the peer's bandwidth value (value per byte of bandwidth in
* the goal function) to the given amount. The argument is followed
* by a double value giving the desired value (can be negative).
* Preference changes are forgotten if peers disconnect.
*/
- GNUNET_ATS_PREFERENCE_BANDWIDTH,
+ GNUNET_ATS_PREFERENCE_BANDWIDTH = 0,
/**
* Change the peer's latency value to the given amount. The
* argument is followed by a double value giving the desired value
* (can be negative). The absolute score in the goal function is
- * the inverse of the latency in ms (minimum: 1 ms) multiplied by
- * the latency preferences.
+ * the inverse of the latency in microseconds (minimum: 1
+ * microsecond) multiplied by the latency preferences.
+ */
+ GNUNET_ATS_PREFERENCE_LATENCY = 1,
+
+ /**
+ * End of preference list.
*/
- GNUNET_ATS_PREFERENCE_LATENCY
+ GNUNET_ATS_PREFERENCE_END = 2
+
};
+/**
+ * Convert a GNUNET_ATS_PreferenceType to a string
+ *
+ * @param type the preference type
+ * @return a string or NULL if invalid
+ */
+const char *
+GNUNET_ATS_print_preference_type (enum GNUNET_ATS_PreferenceKind type);
+
+
/**
* Change preferences for the given peer. Preference changes are forgotten if peers
* disconnect.
*
+ * @param ph performance handle @param peer identifies the peer
+ * @param ... #GNUNET_ATS_PREFERENCE_END-terminated specification of the
+ * desired changes
+ */
+void
+GNUNET_ATS_performance_change_preference (struct GNUNET_ATS_PerformanceHandle *ph,
+ const struct GNUNET_PeerIdentity *peer,
+ ...);
+
+
+/**
+ * Application feedback on how good preference requirements are fulfilled
+ * for the preferences included in the given time scope [now - scope .. now]
+ *
+ * An application notifies ATS if (and only if) it has feedback information
+ * for specific properties. This values are valid until the feedback scores are
+ * updated by the application.
+ *
+ * If the application has no feedback for this preference kind the application
+ * will not explicitly call for this property and will not include it in this
+ * function call.
+ *
* @param ph performance handle
+ * @param scope the time interval this valid for: [now - scope .. now]
* @param peer identifies the peer
- * @param ... 0-terminated specification of the desired changes
+ * @param ... #GNUNET_ATS_PREFERENCE_END-terminated specification of the desired changes
*/
void
-GNUNET_ATS_change_preference (struct GNUNET_ATS_PerformanceHandle *ph,
- const struct GNUNET_PeerIdentity *peer, ...);
+GNUNET_ATS_performance_give_feedback (struct GNUNET_ATS_PerformanceHandle *ph,
+ const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_TIME_Relative scope,
+ ...);
+#endif
+/** @} */ /* end of group */
-#endif
/* end of file gnunet-service-transport_ats.h */
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