/*
- This file is part of GNUnet.
- (C) 2011 Christian Grothoff (and other contributing authors)
+ 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 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.
+ 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.
-*/
+ 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 ats/gnunet-service-ats_addresses.c
+ * @file ats/gnunet-service-ats_addresses.h
* @brief ats service address management
* @author Matthias Wachs
* @author Christian Grothoff
#include "gnunet_util_lib.h"
#include "gnunet_ats_service.h"
+#include "gnunet-service-ats.h"
+#include "gnunet_statistics_service.h"
#include "ats.h"
/**
- * Initialize address subsystem.
- * @param cfg configuration to use
+ * NOTE: Do not change this documentation. This documentation is based on
+ * gnunet.org:/vcs/fsnsg/ats-paper.git/tech-doku/ats-tech-guide.tex
+ * use build_txt.sh to generate plaintext output
+ *
+ * 1 ATS addresses : ATS address management
+ *
+ * This ATS addresses ("addresses") component manages the addresses known to
+ * ATS service and suggests addresses to transport service when it is
+ * interested in address suggestion for a peer. ATS addresses also
+ * instantiates the bandwidth assignment mechanism (solver), notifies it
+ * about changes to addresses and forwards changes to bandwidth assignments
+ * to transport, depending if transport is interested in this change.
+ *
+ * 1.1 Input data
+ *
+ * 1.1.1 Addresses
+ *
+ * Addresses are added by specifying peer ID, plugin, address, address length
+ * and session, if available. ATS information can be specified if available.
+ *
+ * 1.1.2 Networks
+ *
+ * ATS specifies a fix set of networks an address can belong to. For each
+ * network an inbound and outbound quota will be specified. The available
+ * networks and addtional helper varaibles are defined in
+ * gnunet_ats_service.h. At the moment 5 networks are defined:
+ * * GNUNET_ATS_NET_UNSPECIFIED
+ * * GNUNET_ATS_NET_LOOPBACK
+ * * GNUNET_ATS_NET_LAN
+ * * GNUNET_ATS_NET_WAN
+ * * GNUNET_ATS_NET_WLAN
+ *
+ * The total number of networks defined is stored in
+ * GNUNET_ATS_NetworkTypeCount GNUNET_ATS_NetworkType can be used array
+ * initializer for an int array, while GNUNET_ATS_NetworkType is an
+ * initializer for a char array containing a string description of all
+ * networks
+ *
+ * 1.1.3 Quotas
+ *
+ * An inbound and outbound quota for each of the networks mentioned in 1.1.2
+ * is loaded from ats configuration during initialization. This quota defines
+ * to total amount of inbound and outbound traffic allowed for a specific
+ * network. The configuration values used are in section ats:
+ * * "NETWORK"_QUOTA_IN = <value>
+ * * "NETWORK"_QUOTA_IN = <value>
+ *
+ * You can specify quotas by setting the <value> to a:
+ * * unrestricted: unlimited
+ * * number of bytes: e.g. 10240
+ * * fancy value: e.g. 64 Kib
+ *
+ * unlimited is defined as GNUNET_ATS_MaxBandwidthString and equivalent to
+ * the value GNUNET_ATS_MaxBandwidth Important predefined values for quotas
+ * are:
+ * * GNUNET_ATS_DefaultBandwidth: 65536
+ * * GNUNET_ATS_MaxBandwidth: UINT32_MAX
+ * * GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT: 1024
+ *
+ * Details of loading quotas and default values will be described on
+ *
+ * 1.1.4 Preference values
+ *
+ * 1.2 Data structures used
+ *
+ * Addresse uses struct ATS_Address for each address. The structs are stored
+ * in a linked list and provides a pointer void *solver_information for the
+ * solver to store address specific information. It provides the int values
+ * active which is set to GNUNET_YES if the address is select for transport
+ * use and used, representing that transport service is actively using this
+ * address. Address information are stored in peer, addr, addr_len, plugin.
+ *
+ * 1.3 Initialization
+ *
+ * During initialization a hashmap to store addresses is created. The quotas
+ * for all networks defined for ATS are loaded from configuration. For each
+ * network first the logic will check if the string
+ * GNUNET_ATS_MaxBandwidthString is configured, if not it will try to convert
+ * the configured value as a fancy size and if this fails it will try to use
+ * it as a value_number. If no configuration value is found it will assign
+ * GNUNET_ATS_DefaultBandwidth. The most important step is to load the
+ * configured solver using configuration "[ats]:MODE". Current solvers are
+ * MODE_PROPORTIONAL, MODE_MLP. Interaction is done using a solver API
+ *
+ * 1.4 Solver API
+ *
+ * Solver functions:
+ * * s_init: init the solver with required information
+ * * s_add: add a new address
+ * * s_update: update ATS values or session for an address
+ * * s_get: get prefered address for a peer
+ * * s_del: delete an address
+ * * s_pref: change preference value for a peer
+ * * s_done: shutdown solver
+ *
+ * Callbacks: addresses provides a bandwidth_changed_cb callback to the
+ * solver which is called when bandwidth assigned to peer has changed
+ *
+ * 1.5 Shutdown
+ *
+ * During shutdown all addresses are freed and the solver told to shutdown
+ *
+ * 1.6 Addresses and sessions
+ *
+ * Addresses consist of the address itself and a numerical session. When a
+ * new address without a session is added it has no session, so it gets
+ * session 0 assigned. When an address with a session is added and an address
+ * object with session 0 is found, this object is updated with the session
+ * otherwise a new address object with this session assigned is created.
+ *
+ * 1.6.1 Terminology
+ *
+ * Addresses a1,a2 with session s1, s2 are "exact" if:
+ * (a1 == a2)&&(s1 == s2)
+ * Addresses a1,a2 with session s1, s2 are "equivalent" if:
+ * (a1 == a2)&&((s1 == s2)||(s1 == 0)||(s2 == 0)
+ *
+ * 1.7 Address management
+ *
+ * Transport service notifies ATS about changes to the addresses known to
+ * him.
+ *
+ * 1.7.1 Adding an address
+ *
+ * When transport learns a new address it tells ATS and ATS is telling
+ * addresses about it using GAS_address_add. If not known to addresses it
+ * creates a new address object and calls solver's s_add. ATS information are
+ * deserialized and solver is notified about the session and ATS information
+ * using s_update.
+ *
+ * 1.7.2 Updating an address
+ *
+ * Addresses does an lookup up for the existing address with the given
+ * session. If disassembles included ATS information and notifies the solver
+ * using s_update about the update.
+ *
+ * 1.7.3 Deleting an address
+ *
+ * Addresses does an lookup for the exact address and session and if removes
+ * this address. If session != 0 the session is set to 0 and the address is
+ * kept. If session == 0, the addresses is removed.
+ *
+ * 1.7.4 Requesting an address suggestion
+ *
+ * The address client issues a request address message to be notified about
+ * address suggestions for a specific peer. Addresses asks the solver with
+ * s_get. If no address is available, it will not send a response, otherwise
+ * it will respond with the choosen address.
+ *
+ * 1.7.5 Address suggestions
+ *
+ * Addresses will notify the client automatically on any bandwidth_changed_cb
+ * by the solver if a address suggestion request is pending. If no address is
+ * available it will not respond at all If the client is not interested
+ * anymore, it has to cancel the address suggestion request.
+ *
+ * 1.7.6 Suggestions blocks and reset
+ *
+ * After suggesting an address it is blocked for ATS_BLOCKING_DELTA sec. to
+ * prevent the client from being thrashed. If the client requires immediately
+ * it can reset this block using GAS_addresses_handle_backoff_reset.
+ *
+ * 1.7.7 Marking address in use
+ *
+ * The client can notify addresses that it successfully uses an address and
+ * wants this address to be kept by calling GSA_address_in_use. Adresses will
+ * mark the address as used an notify the solver about the use.
+ *
+ * 1.7.8 Address lifecycle
+ *
+ * * (add address)
+ * * (updated address) || (address in use)
+ * * (delete address)
+ *
+ * 1.8 Bandwidth assignment
+ *
+ * The addresses are used to perform resource allocation operations. ATS
+ * addresses takes care of instantiating the solver configured and notifies
+ * the respective solver about address changes and receives changes to the
+ * bandwidth assignment from the solver. The current bandwidth assignment is
+ * sent to transport. The specific solvers will be described in the specific
+ * section.
+ *
+ * 1.9 Changing peer preferences
+ *
+ * The bandwidth assigned to a peer can be influenced by setting a preference
+ * for a peer. The prefernce will be given to to the solver with s_pref which
+ * has to take care of the preference value
+
*/
-void
-GAS_addresses_init (const struct GNUNET_CONFIGURATION_Handle *cfg);
+/*
+ * How long will address suggestions blocked after a suggestion
+ */
+#define ATS_BLOCKING_DELTA GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 100)
+
+/**
+ * Information provided by ATS normalization
+ */
+struct GAS_NormalizationInfo
+{
+ /**
+ * Next index to use in averaging queue
+ */
+ unsigned int avg_queue_index;
+
+ /**
+ * Averaging queue
+ */
+ uint32_t atsi_abs[GAS_normalization_queue_length];
+
+ /**
+ * Averaged ATSI values from queue
+ */
+ uint32_t avg;
+
+ /**
+ * Normalized values from queue to a range of values [1.0...2.0]
+ */
+ double norm;
+};
+
+/**
+ * Address with additional information
+ */
+struct ATS_Address
+{
+ /**
+ * Next element in DLL
+ */
+ struct ATS_Address *next;
+
+ /**
+ * Previous element in DLL
+ */
+ struct ATS_Address *prev;
+
+ /**
+ * Peer ID
+ */
+ struct GNUNET_PeerIdentity peer;
+
+ /**
+ * Session ID, 0 if no session is given
+ */
+ uint32_t session_id;
+
+ /**
+ * Address
+ */
+ const void *addr;
+
+ /**
+ * Address length
+ */
+ size_t addr_len;
+
+ /**
+ * Plugin name
+ */
+ char *plugin;
+
+ /**
+ * Solver specific information for this address
+ */
+ void *solver_information;
+
+ /**
+ * ATS performance information for this address
+ */
+ struct GNUNET_ATS_Information *atsi;
+
+ /**
+ * ATS performance information for this address
+ */
+ uint32_t atsi_count;
+
+ /**
+ * Inbound bandwidth assigned by solver in NBO
+ */
+ struct GNUNET_BANDWIDTH_Value32NBO assigned_bw_in;
+
+ /**
+ * Outbound bandwidth assigned by solver in NBO
+ */
+ struct GNUNET_BANDWIDTH_Value32NBO assigned_bw_out;
+
+ /**
+ * Blocking interval
+ */
+ struct GNUNET_TIME_Relative block_interval;
+
+ /**
+ * Time when address can be suggested again
+ */
+ struct GNUNET_TIME_Absolute blocked_until;
+
+ /**
+ * Is this the active address for this peer?
+ */
+ int active;
+
+ /**
+ * Is this the address for this peer in use?
+ */
+ int used;
+
+ /**
+ * Normalized ATS performance information for this address
+ * Each entry can be accessed using the GNUNET_ATS_QualityProperties avg_queue_index
+ */
+ struct GAS_NormalizationInfo atsin[GNUNET_ATS_QualityPropertiesCount];
+};
+
+/**
+ * Callback to call from solver when bandwidth for address has changed
+ *
+ * @param address the with changed bandwidth assigned
+ */
+typedef void
+(*GAS_bandwidth_changed_cb) (void *cls, struct ATS_Address *address);
+
+/**
+ * Callback to call from solver to obtain application preference values for a
+ * peer
+ *
+ * @param cls the cls
+ * @param id the peer id
+ * @return carry of double values containing the preferences with
+ * GNUNET_ATS_PreferenceCount elements
+ */
+typedef const double *
+(*GAS_get_preferences) (void *cls, const struct GNUNET_PeerIdentity *id);
+
+/**
+ * Callback to call from solver to obtain transport properties for an
+ * address
+ *
+ * @param cls the cls
+ * @param address the address
+ * @return carry of double values containing the preferences with
+ * GNUNET_ATS_PreferenceCount elements
+ */
+typedef const double *
+(*GAS_get_properties) (void *cls, const struct ATS_Address *address);
+
+/*
+ * Solver API
+ * ----------
+ */
+
+/**
+ * Init the problem solving component
+ *
+ * Quotas:
+ * network[i] contains the network type as type GNUNET_ATS_NetworkType[i]
+ * out_quota[i] contains outbound quota for network type i
+ * in_quota[i] contains inbound quota for network type i
+ *
+ * Example
+ * network = {GNUNET_ATS_NET_UNSPECIFIED, GNUNET_ATS_NET_LOOPBACK, GNUNET_ATS_NET_LAN, GNUNET_ATS_NET_WAN, GNUNET_ATS_NET_WLAN}
+ * network[2] == GNUNET_ATS_NET_LAN
+ * out_quota[2] == 65353
+ * in_quota[2] == 65353
+ *
+ * @param cfg configuration handle
+ * @param stats the GNUNET_STATISTICS handle
+ * @param addresses hashmap containing all addresses
+ * @param network array of GNUNET_ATS_NetworkType with length dest_length
+ * @param out_quota array of outbound quotas
+ * @param in_quota array of outbound quota
+ * @param bw_changed_cb callback to call when assigned changes
+ * @return handle for the solver on success, NULL on fail
+ */
+typedef void *
+(*GAS_solver_init) (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ const struct GNUNET_STATISTICS_Handle *stats,
+ const struct GNUNET_CONTAINER_MultiHashMap *addresses, int *network,
+ unsigned long long *out_quota, unsigned long long *in_quota,
+ int dest_length, GAS_bandwidth_changed_cb bw_changed_cb,
+ void *bw_changed_cb_cls, GAS_get_preferences get_preference,
+ void *get_preference_cls, GAS_get_properties get_properties,
+ void *get_properties_cls);
+
+/**
+ * Change the preference for a peer
+ *
+ * @param handle the solver handle
+ * @param client the client sending this request
+ * @param peer the peer id
+ * @param kind the preference kind to change
+ * @param score the new preference score
+ * @param pref_rel the normalized preference value for this kind over all clients
+ */
+typedef void
+(*GAS_solver_address_change_preference) (void *solver,
+ const struct GNUNET_PeerIdentity *peer, enum GNUNET_ATS_PreferenceKind kind,
+ double pref_rel);
+
+/**
+ * Give feedback about the current assignment
+ *
+ * @param handle the solver handle
+ * @param application the application sending this request
+ * @param peer the peer id
+ * @param scope the time interval for this feedback: [now - scope .. now]
+ * @param kind the preference kind for this feedback
+ * @param score the feedback score
+ */
+typedef void
+(*GAS_solver_address_feedback_preference) (void *solver, void *application,
+ const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_TIME_Relative scope,
+ enum GNUNET_ATS_PreferenceKind kind, double score);
+
+/**
+ * Notify the solver about a bulk operation changing possibly a lot of values
+ * Solver will not resolve until all bulk operations are marked as done
+ *
+ * @param solver the solver
+ */
+typedef void
+(*GAS_solver_bulk_start) (void *solver);
+
+/**
+ * Mark a bulk operation as done
+ * Solver will resolve if values have changed
+ *
+ * @param solver the solver
+ */
+typedef void
+(*GAS_solver_bulk_stop) (void *solver);
+
+/**
+ * Add a single address within a network to the solver
+ *
+ * @param solver the solver Handle
+ * @param addresses the address hashmap containing all addresses
+ * @param address the address to add
+ * @param network network type of this address
+ */
+typedef void
+(*GAS_solver_address_add) (void *solver, struct ATS_Address *address,
+ uint32_t network);
+
+/**
+ * Delete an address or just the session from the solver
+ *
+ * @param solver the solver Handle
+ * @param addresses the address hashmap containing all addresses
+ * @param address the address to delete
+ * @param session_only remove address or just session
+ */
+typedef void
+(*GAS_solver_address_delete) (void *solver, struct ATS_Address *address,
+ int session_only);
+
+/**
+ * Transport properties for this address have changed
+ *
+ * @param solver solver handle
+ * @param address the address
+ * @param type the ATSI type in HBO
+ * @param abs_value the absolute value of the property
+ * @param rel_value the normalized value
+ */
+typedef void
+(*GAS_solver_address_property_changed) (void *solver,
+ struct ATS_Address *address, uint32_t type, uint32_t abs_value,
+ double rel_value);
+
+/**
+ * Transport session for this address has changed
+ *
+ * NOTE: values in addresses are already updated
+ *
+ * @param solver solver handle
+ * @param address the address
+ * @param cur_session the current session
+ * @param new_session the new session
+ */
+typedef void
+(*GAS_solver_address_session_changed) (void *solver,
+ struct ATS_Address *address, uint32_t cur_session, uint32_t new_session);
+
+/**
+ * Transport session for this address has changed
+ *
+ * NOTE: values in addresses are already updated
+ *
+ * @param solver solver handle
+ * @param address the address
+ * @param in_use usage state
+ */
+typedef void
+(*GAS_solver_address_inuse_changed) (void *solver, struct ATS_Address *address,
+ int in_use);
+
+/**
+ * Network scope for this address has changed
+ *
+ * NOTE: values in addresses are already updated
+ *
+ * @param solver solver handle
+ * @param address the address
+ * @param current_network the current network
+ * @param new_network the new network
+ */
+typedef void
+(*GAS_solver_address_network_changed) (void *solver,
+ struct ATS_Address *address, uint32_t current_network, uint32_t new_network);
+
+/**
+ * Get the prefered address for a peer from solver
+ *
+ * @param solver the solver to use
+ * @param addresses the address hashmap containing all addresses
+ * @param peer the peer
+ */
+typedef const struct ATS_Address *
+(*GAS_solver_get_preferred_address) (void *solver,
+ const struct GNUNET_PeerIdentity *peer);
+
+/**
+ * Stop getting the prefered address for a peer from solver
+ *
+ * @param solver the solver to use
+ * @param addresses the address hashmap containing all addresses
+ * @param peer the peer
+ */
+typedef void
+(*GAS_solver_stop_get_preferred_address) (void *solver,
+ const struct GNUNET_PeerIdentity *peer);
+
+/**
+ * Shutdown solver
+ *
+ * @param solver the solver to shutdown
+ */
+
+typedef void
+(*GAS_solver_done) (void *solver);
+
+/**
+ * Initialize address subsystem. The addresses subsystem manages the addresses
+ * known and current performance information. It has a solver component
+ * responsible for the resource allocation. It tells the solver about changes
+ * and receives updates when the solver changes the ressource allocation.
+ *
+ * @param cfg configuration to use
+ * @param stats the statistics handle to use
+ * @return an address handle
+ */
+struct GAS_Addresses_Handle *
+GAS_addresses_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ const struct GNUNET_STATISTICS_Handle *stats);
/**
* Shutdown address subsystem.
+ *
+ * @param handle the address handle to shutdown
*/
void
-GAS_addresses_done (void);
+GAS_addresses_done (struct GAS_Addresses_Handle *handle);
/**
- * Returns where the address is located: LAN or WAN or ...
- * @param addr address
- * @param addrlen address length
- * @return location as GNUNET_ATS_Information
+ * Add a new address for a peer.
+ *
+ * @param handle the address handle to use
+ * @param peer peer
+ * @param plugin_name transport plugin name
+ * @param plugin_addr plugin address
+ * @param plugin_addr_len length of the plugin address
+ * @param session_id session id, can be 0
+ * @param atsi performance information for this address
+ * @param atsi_count number of performance information contained
*/
+void
+GAS_addresses_add (struct GAS_Addresses_Handle *handle,
+ const struct GNUNET_PeerIdentity *peer, const char *plugin_name,
+ const void *plugin_addr, size_t plugin_addr_len, uint32_t session_id,
+ const struct GNUNET_ATS_Information *atsi, uint32_t atsi_count);
-struct GNUNET_ATS_Information
-GAS_addresses_type (const struct sockaddr * addr, socklen_t addrlen);
+/**
+ * Notification about active use of an address.
+ * in_use == GNUNET_YES:
+ * This address is used to maintain an active connection with a peer.
+ * in_use == GNUNET_NO:
+ * This address is no longer used to maintain an active connection with a peer.
+ *
+ * Note: can only be called with in_use == GNUNET_NO if called with GNUNET_YES
+ * before
+ *
+ * @param handle the address handle to use
+ * @param peer peer
+ * @param plugin_name transport plugin name
+ * @param plugin_addr plugin address
+ * @param plugin_addr_len length of the plugin address
+ * @param session_id session id, can be 0
+ * @param in_use GNUNET_YES if GNUNET_NO
+ * @return GNUNET_SYSERR on failure (address unknown ...)
+ */
+int
+GAS_addresses_in_use (struct GAS_Addresses_Handle *handle,
+ const struct GNUNET_PeerIdentity *peer, const char *plugin_name,
+ const void *plugin_addr, size_t plugin_addr_len, uint32_t session_id,
+ int in_use);
/**
- * This address is now used or not used anymore
+ * Update an address with a session or performance information for a peer.
+ *
+ * If an address was added without a session it will be updated with the
+ * session
+ *
+ * @param handle the address handle to use
+ * @param peer peer
+ * @param plugin_name transport plugin name
+ * @param plugin_addr plugin address
+ * @param plugin_addr_len length of the plugin address
+ * @param session_id session id, can be 0
+ * @param atsi performance information for this address
+ * @param atsi_count number of performance information contained
*/
void
-GAS_addresses_in_use (const struct GNUNET_PeerIdentity *peer,
- const char *plugin_name, const void *plugin_addr,
- size_t plugin_addr_len, uint32_t session_id, int in_use);
+GAS_addresses_update (struct GAS_Addresses_Handle *handle,
+ const struct GNUNET_PeerIdentity *peer, const char *plugin_name,
+ const void *plugin_addr, size_t plugin_addr_len, uint32_t session_id,
+ const struct GNUNET_ATS_Information *atsi, uint32_t atsi_count);
+/**
+ * Remove an address or just a session for a peer.
+ *
+ * @param handle the address handle to use
+ * @param peer peer
+ * @param plugin_name transport plugin name
+ * @param plugin_addr plugin address
+ * @param plugin_addr_len length of the plugin address
+ * @param session_id session id, can be 0
+ */
void
-GAS_addresses_update (const struct GNUNET_PeerIdentity *peer,
- const char *plugin_name, const void *plugin_addr,
- size_t plugin_addr_len, uint32_t session_id,
- const struct GNUNET_ATS_Information *atsi,
- uint32_t atsi_count);
+GAS_addresses_destroy (struct GAS_Addresses_Handle *handle,
+ const struct GNUNET_PeerIdentity *peer, const char *plugin_name,
+ const void *plugin_addr, size_t plugin_addr_len, uint32_t session_id);
+/**
+ * Remove all addresses
+ *
+ * @param handle the address handle to use
+ */
+void
+GAS_addresses_destroy_all (struct GAS_Addresses_Handle *handle);
+/**
+ * Request address suggestions for a peer
+ *
+ * @param handle the address handle
+ * @param peer the peer id
+ */
void
-GAS_addresses_destroy (const struct GNUNET_PeerIdentity *peer,
- const char *plugin_name, const void *plugin_addr,
- size_t plugin_addr_len, uint32_t session_id);
+GAS_addresses_request_address (struct GAS_Addresses_Handle *handle,
+ const struct GNUNET_PeerIdentity *peer);
+/**
+ * Cancel address suggestions for a peer
+ *
+ * @param handle the address handle
+ * @param peer the peer id
+ */
+void
+GAS_addresses_request_address_cancel (struct GAS_Addresses_Handle *handle,
+ const struct GNUNET_PeerIdentity *peer);
+/**
+ * Reset suggestion backoff for a peer
+ *
+ * Suggesting addresses is blocked for ATS_BLOCKING_DELTA. Blocking can be
+ * reset using this function
+ *
+ * @param handle the address handle
+ * @param peer the peer id
+ */
void
-GAS_addresses_destroy_all (void);
+GAS_addresses_handle_backoff_reset (struct GAS_Addresses_Handle *handle,
+ const struct GNUNET_PeerIdentity *peer);
+/**
+ * Change the preference for a peer
+ *
+ * @param handle the address handle
+ * @param client the client sending this request
+ * @param peer the peer id
+ * @param kind the preference kind to change
+ * @param score_abs the new preference score
+ */
+void
+GAS_addresses_change_preference (struct GAS_Addresses_Handle *handle,
+ void *client, const struct GNUNET_PeerIdentity *peer,
+ enum GNUNET_ATS_PreferenceKind kind, float score_abs);
-// FIXME: this function should likely end up in the LP-subsystem and
-// not with 'addresses' in the future...
-// Note: this call should trigger an address suggestion
-// (GAS_scheduling_transmit_address_suggestion)
+/**
+ * Change the preference for a peer
+ *
+ * @param handle the address handle
+ * @param application the client sending this request
+ * @param peer the peer id
+ * @param scope the time interval this valid for: [now - scope .. now]
+ * @param kind the preference kind to change
+ * @param score_abs the new preference score
+ */
void
-GAS_addresses_request_address (const struct GNUNET_PeerIdentity *peer);
+GAS_addresses_preference_feedback (struct GAS_Addresses_Handle *handle,
+ void *application, const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_TIME_Relative scope,
+ enum GNUNET_ATS_PreferenceKind kind, float score_abs);
+/**
+ * Iterator for GAS_addresses_iterate_peers
+ *
+ * @param p_it_cls closure
+ * @param id the peer id
+ */
+typedef void
+(*GNUNET_ATS_Peer_Iterator) (void *p_it_cls,
+ const struct GNUNET_PeerIdentity *id);
-// FIXME: this function should likely end up in the LP-subsystem and
-// not with 'addresses' in the future...
+/**
+ * Return all peers currently known to ATS
+ *
+ * @param handle the address handle to use
+ * @param p_it the iterator to call for every peer
+ * @param p_it_cls the closure for the iterator
+ */
void
-GAS_addresses_change_preference (const struct GNUNET_PeerIdentity *peer,
- enum GNUNET_ATS_PreferenceKind kind,
- float score);
+GAS_addresses_iterate_peers (struct GAS_Addresses_Handle *handle,
+ GNUNET_ATS_Peer_Iterator p_it, void *p_it_cls);
+/**
+ * Iterator for GAS_addresses_get_peer_info
+ *
+ * @param p_it_cls closure closure
+ * @param id the peer id
+ * @param plugin_name plugin name
+ * @param plugin_addr address
+ * @param plugin_addr_len address length
+ * @param address_active is address actively used
+ * @param atsi ats performance information
+ * @param atsi_count number of ats performance elements
+ * @param bandwidth_out current outbound bandwidth assigned to address
+ * @param bandwidth_in current inbound bandwidth assigned to address
+ */
+typedef void
+(*GNUNET_ATS_PeerInfo_Iterator) (void *p_it_cls,
+ const struct GNUNET_PeerIdentity *id, const char *plugin_name,
+ const void *plugin_addr, size_t plugin_addr_len, const int address_active,
+ const struct GNUNET_ATS_Information *atsi, uint32_t atsi_count,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in);
-/* FIXME: add performance request API */
+/**
+ * Return information all peers currently known to ATS
+ *
+ * @param handle the address handle to use
+ * @param peer the respective peer
+ * @param pi_it the iterator to call for every peer
+ * @param pi_it_cls the closure for the iterator
+ */
+void
+GAS_addresses_get_peer_info (struct GAS_Addresses_Handle *handle,
+ const struct GNUNET_PeerIdentity *peer, GNUNET_ATS_PeerInfo_Iterator pi_it,
+ void *pi_it_cls);
#endif
+
+/* end of gnunet-service-ats_addresses.h */