2 This file is part of GNUnet.
3 (C) 2009, 2010 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
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13 General Public License for more details.
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22 * @file transport/gnunet-service-transport.c
23 * @brief low-level P2P messaging
24 * @author Christian Grothoff
28 #include "gnunet_client_lib.h"
29 #include "gnunet_container_lib.h"
30 #include "gnunet_constants.h"
31 #include "gnunet_getopt_lib.h"
32 #include "gnunet_hello_lib.h"
33 #include "gnunet_os_lib.h"
34 #include "gnunet_peerinfo_service.h"
35 #include "gnunet_plugin_lib.h"
36 #include "gnunet_protocols.h"
37 #include "gnunet_service_lib.h"
38 #include "gnunet_signatures.h"
39 #include "gnunet_transport_plugin.h"
40 #include "transport.h"
45 #define DEBUG_BLACKLIST GNUNET_NO
47 #define DEBUG_PING_PONG GNUNET_NO
49 #define DEBUG_TRANSPORT_HELLO GNUNET_NO
51 #define DEBUG_ATS GNUNET_NO
53 #define VERBOSE_ATS GNUNET_NO
56 * Should we do some additional checks (to validate behavior
59 #define EXTRA_CHECKS GNUNET_YES
62 * How many messages can we have pending for a given client process
63 * before we start to drop incoming messages? We typically should
64 * have only one client and so this would be the primary buffer for
65 * messages, so the number should be chosen rather generously.
67 * The expectation here is that most of the time the queue is large
68 * enough so that a drop is virtually never required. Note that
69 * this value must be about as large as 'TOTAL_MSGS' in the
70 * 'test_transport_api_reliability.c', otherwise that testcase may
73 #define MAX_PENDING (128 * 1024)
76 * Size of the per-transport blacklist hash maps.
78 #define TRANSPORT_BLACKLIST_HT_SIZE 16
81 * How often should we try to reconnect to a peer using a particular
82 * transport plugin before giving up? Note that the plugin may be
83 * added back to the list after PLUGIN_RETRY_FREQUENCY expires.
85 #define MAX_CONNECT_RETRY 3
88 * Limit on the number of ready-to-run tasks when validating
89 * HELLOs. If more tasks are ready to run, we will drop
90 * HELLOs instead of validating them.
92 #define MAX_HELLO_LOAD 4
95 * How often must a peer violate bandwidth quotas before we start
96 * to simply drop its messages?
98 #define QUOTA_VIOLATION_DROP_THRESHOLD 10
101 * How long until a HELLO verification attempt should time out?
102 * Must be rather small, otherwise a partially successful HELLO
103 * validation (some addresses working) might not be available
104 * before a client's request for a connection fails for good.
105 * Besides, if a single request to an address takes a long time,
106 * then the peer is unlikely worthwhile anyway.
108 #define HELLO_VERIFICATION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
111 * How long is a PONG signature valid? We'll recycle a signature until
112 * 1/4 of this time is remaining. PONGs should expire so that if our
113 * external addresses change an adversary cannot replay them indefinitely.
114 * OTOH, we don't want to spend too much time generating PONG signatures,
115 * so they must have some lifetime to reduce our CPU usage.
117 #define PONG_SIGNATURE_LIFETIME GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 1)
120 * Priority to use for PONG messages.
122 #define TRANSPORT_PONG_PRIORITY 4
125 * How often do we re-add (cheaper) plugins to our list of plugins
126 * to try for a given connected peer?
128 #define PLUGIN_RETRY_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 15)
131 * After how long do we expire an address in a HELLO that we just
132 * validated? This value is also used for our own addresses when we
135 #define HELLO_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 12)
139 * How long before an existing address expires should we again try to
140 * validate it? Must be (significantly) smaller than
141 * HELLO_ADDRESS_EXPIRATION.
143 #define HELLO_REVALIDATION_START_TIME GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 1)
146 * Maximum frequency for re-evaluating latencies for all transport addresses.
148 #define LATENCY_EVALUATION_MAX_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 1)
151 * Maximum frequency for re-evaluating latencies for connected addresses.
153 #define CONNECTED_LATENCY_EVALUATION_MAX_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 1)
155 #define VERY_BIG_DOUBLE_VALUE 100000000000LL
158 #define ATS_Q_UPDATED 1
159 #define ATS_C_UPDATED 2
160 #define ATS_QC_UPDATED 3
161 #define ATS_UNMODIFIED 4
164 * List of addresses of other peers
166 struct ForeignAddressList
169 * This is a linked list.
171 struct ForeignAddressList *next;
174 * Which ready list does this entry belong to.
176 struct ReadyList *ready_list;
179 * How long until we auto-expire this address (unless it is
180 * re-confirmed by the transport)?
182 struct GNUNET_TIME_Absolute expires;
185 * Task used to re-validate addresses, updates latencies and
188 GNUNET_SCHEDULER_TaskIdentifier revalidate_task;
196 * Session (or NULL if no valid session currently exists or if the
197 * plugin does not use sessions).
199 struct Session *session;
201 struct ATS_ressource_entry * ressources;
203 struct ATS_quality_entry * quality;
206 * What was the last latency observed for this address, plugin and peer?
208 struct GNUNET_TIME_Relative latency;
211 * If we did not successfully transmit a message to the given peer
212 * via this connection during the specified time, we should consider
213 * the connection to be dead. This is used in the case that a TCP
214 * transport simply stalls writing to the stream but does not
215 * formerly get a signal that the other peer died.
217 struct GNUNET_TIME_Absolute timeout;
220 * How often have we tried to connect using this plugin? Used to
221 * discriminate against addresses that do not work well.
222 * FIXME: not yet used, but should be!
224 unsigned int connect_attempts;
227 * DV distance to this peer (1 if no DV is used).
228 * FIXME: need to set this from transport plugins!
238 * Have we ever estimated the latency of this address? Used to
239 * ensure that the first time we add an address, we immediately
245 * Are we currently connected via this address? The first time we
246 * successfully transmit or receive data to a peer via a particular
247 * address, we set this to GNUNET_YES. If we later get an error
248 * (disconnect notification, transmission failure, timeout), we set
249 * it back to GNUNET_NO.
254 * Is this plugin currently busy transmitting to the specific target?
255 * GNUNET_NO if not (initial, default state is GNUNET_NO). Internal
256 * messages do not count as 'in transmit'.
261 * Has this address been validated yet?
269 * Entry in linked list of network addresses for ourselves. Also
270 * includes a cached signature for 'struct TransportPongMessage's.
272 struct OwnAddressList
275 * This is a linked list.
277 struct OwnAddressList *next;
280 * How long until we actually auto-expire this address (unless it is
281 * re-confirmed by the transport)?
283 struct GNUNET_TIME_Absolute expires;
286 * How long until the current signature expires? (ZERO if the
287 * signature was never created).
289 struct GNUNET_TIME_Absolute pong_sig_expires;
292 * Signature for a 'struct TransportPongMessage' for this address.
294 struct GNUNET_CRYPTO_RsaSignature pong_signature;
305 * Entry in linked list of all of our plugins.
307 struct TransportPlugin
311 * This is a linked list.
313 struct TransportPlugin *next;
316 * API of the transport as returned by the plugin's
317 * initialization function.
319 struct GNUNET_TRANSPORT_PluginFunctions *api;
322 * Short name for the plugin (i.e. "tcp").
327 * Name of the library (i.e. "gnunet_plugin_transport_tcp").
332 * List of our known addresses for this transport.
334 struct OwnAddressList *addresses;
337 * Environment this transport service is using
340 struct GNUNET_TRANSPORT_PluginEnvironment env;
343 * ID of task that is used to clean up expired addresses.
345 GNUNET_SCHEDULER_TaskIdentifier address_update_task;
348 * Set to GNUNET_YES if we need to scrap the existing list of
349 * "addresses" and start fresh when we receive the next address
350 * update from a transport. Set to GNUNET_NO if we should just add
351 * the new address to the list and wait for the commit call.
355 struct ATS_plugin * rc;
358 * Hashmap of blacklisted peers for this particular transport.
360 struct GNUNET_CONTAINER_MultiHashMap *blacklist;
363 struct NeighbourList;
366 * For each neighbour we keep a list of messages
367 * that we still want to transmit to the neighbour.
373 * This is a doubly linked list.
375 struct MessageQueue *next;
378 * This is a doubly linked list.
380 struct MessageQueue *prev;
383 * The message(s) we want to transmit, GNUNET_MessageHeader(s)
384 * stuck together in memory. Allocated at the end of this struct.
386 const char *message_buf;
389 * Size of the message buf
391 size_t message_buf_size;
394 * Client responsible for queueing the message;
395 * used to check that a client has no two messages
396 * pending for the same target. Can be NULL.
398 struct TransportClient *client;
401 * Using which specific address should we send this message?
403 struct ForeignAddressList *specific_address;
406 * Peer ID of the Neighbour this entry belongs to.
408 struct GNUNET_PeerIdentity neighbour_id;
411 * Plugin that we used for the transmission.
412 * NULL until we scheduled a transmission.
414 struct TransportPlugin *plugin;
417 * At what time should we fail?
419 struct GNUNET_TIME_Absolute timeout;
422 * Internal message of the transport system that should not be
423 * included in the usual SEND-SEND_OK transmission confirmation
424 * traffic management scheme. Typically, "internal_msg" will
425 * be set whenever "client" is NULL (but it is not strictly
431 * How important is the message?
433 unsigned int priority;
439 * For a given Neighbour, which plugins are available
440 * to talk to this peer and what are their costs?
445 * This is a linked list.
447 struct ReadyList *next;
450 * Which of our transport plugins does this entry
453 struct TransportPlugin *plugin;
456 * Transport addresses, latency, and readiness for
457 * this particular plugin.
459 struct ForeignAddressList *addresses;
462 * To which neighbour does this ready list belong to?
464 struct NeighbourList *neighbour;
469 * Entry in linked list of all of our current neighbours.
475 * This is a linked list.
477 struct NeighbourList *next;
480 * Which of our transports is connected to this peer
481 * and what is their status?
483 struct ReadyList *plugins;
486 * Head of list of messages we would like to send to this peer;
487 * must contain at most one message per client.
489 struct MessageQueue *messages_head;
492 * Tail of list of messages we would like to send to this peer; must
493 * contain at most one message per client.
495 struct MessageQueue *messages_tail;
498 * Buffer for at most one payload message used when we receive
499 * payload data before our PING-PONG has succeeded. We then
500 * store such messages in this intermediary buffer until the
501 * connection is fully up.
503 struct GNUNET_MessageHeader *pre_connect_message_buffer;
506 * Context for peerinfo iteration.
507 * NULL after we are done processing peerinfo's information.
509 struct GNUNET_PEERINFO_IteratorContext *piter;
512 * Public key for this peer. Valid only if the respective flag is set below.
514 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
517 * Identity of this neighbour.
519 struct GNUNET_PeerIdentity id;
522 * ID of task scheduled to run when this peer is about to
523 * time out (will free resources associated with the peer).
525 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
528 * ID of task scheduled to run when we should retry transmitting
529 * the head of the message queue. Actually triggered when the
530 * transmission is timing out (we trigger instantly when we have
531 * a chance of success).
533 GNUNET_SCHEDULER_TaskIdentifier retry_task;
536 * How long until we should consider this peer dead
537 * (if we don't receive another message in the
540 struct GNUNET_TIME_Absolute peer_timeout;
543 * Tracker for inbound bandwidth.
545 struct GNUNET_BANDWIDTH_Tracker in_tracker;
548 * The latency we have seen for this particular address for
549 * this particular peer. This latency may have been calculated
550 * over multiple transports. This value reflects how long it took
551 * us to receive a response when SENDING via this particular
552 * transport/neighbour/address combination!
554 * FIXME: we need to periodically send PINGs to update this
555 * latency (at least more often than the current "huge" (11h?)
558 struct GNUNET_TIME_Relative latency;
561 * How often has the other peer (recently) violated the
562 * inbound traffic limit? Incremented by 10 per violation,
563 * decremented by 1 per non-violation (for each
566 unsigned int quota_violation_count;
569 * DV distance to this peer (1 if no DV is used).
574 * Have we seen an PONG from this neighbour in the past (and
575 * not had a disconnect since)?
580 * Do we have a valid public key for this neighbour?
582 int public_key_valid;
585 * Performance data for the peer.
587 struct GNUNET_TRANSPORT_ATS_Information *ats;
590 * Identity of the neighbour.
592 struct GNUNET_PeerIdentity peer;
597 * Message used to ask a peer to validate receipt (to check an address
598 * from a HELLO). Followed by the address we are trying to validate,
599 * or an empty address if we are just sending a PING to confirm that a
600 * connection which the receiver (of the PING) initiated is still valid.
602 struct TransportPingMessage
606 * Type will be GNUNET_MESSAGE_TYPE_TRANSPORT_PING
608 struct GNUNET_MessageHeader header;
611 * Challenge code (to ensure fresh reply).
613 uint32_t challenge GNUNET_PACKED;
616 * Who is the intended recipient?
618 struct GNUNET_PeerIdentity target;
624 * Message used to validate a HELLO. The challenge is included in the
625 * confirmation to make matching of replies to requests possible. The
626 * signature signs our public key, an expiration time and our address.<p>
628 * This message is followed by our transport address that the PING tried
629 * to confirm (if we liked it). The address can be empty (zero bytes)
630 * if the PING had not address either (and we received the request via
631 * a connection that we initiated).
633 struct TransportPongMessage
637 * Type will be GNUNET_MESSAGE_TYPE_TRANSPORT_PONG
639 struct GNUNET_MessageHeader header;
642 * Challenge code from PING (showing freshness). Not part of what
643 * is signed so that we can re-use signatures.
645 uint32_t challenge GNUNET_PACKED;
650 struct GNUNET_CRYPTO_RsaSignature signature;
653 * What are we signing and why? Two possible reason codes can be here:
654 * GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN to confirm that this is a
655 * plausible address for this peer (pid is set to identity of signer); or
656 * GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING to confirm that this is
657 * an address we used to connect to the peer with the given pid.
659 struct GNUNET_CRYPTO_RsaSignaturePurpose purpose;
662 * When does this signature expire?
664 struct GNUNET_TIME_AbsoluteNBO expiration;
667 * Either the identity of the peer Who signed this message, or the
668 * identity of the peer that we're connected to using the given
669 * address (depending on purpose.type).
671 struct GNUNET_PeerIdentity pid;
674 * Size of address appended to this message (part of what is
675 * being signed, hence not redundant).
683 * Linked list of messages to be transmitted to the client. Each
684 * entry is followed by the actual message.
686 struct ClientMessageQueueEntry
689 * This is a doubly-linked list.
691 struct ClientMessageQueueEntry *next;
694 * This is a doubly-linked list.
696 struct ClientMessageQueueEntry *prev;
701 * Client connected to the transport service.
703 struct TransportClient
707 * This is a linked list.
709 struct TransportClient *next;
712 * Handle to the client.
714 struct GNUNET_SERVER_Client *client;
717 * Linked list of messages yet to be transmitted to
720 struct ClientMessageQueueEntry *message_queue_head;
723 * Tail of linked list of messages yet to be transmitted to the
726 struct ClientMessageQueueEntry *message_queue_tail;
729 * Current transmit request handle.
731 struct GNUNET_CONNECTION_TransmitHandle *th;
734 * Is a call to "transmit_send_continuation" pending? If so, we
735 * must not free this struct (even if the corresponding client
736 * disconnects) and instead only remove it from the linked list and
737 * set the "client" field to NULL.
742 * Length of the list of messages pending for this client.
744 unsigned int message_count;
750 * Context of currently active requests to peerinfo
751 * for validation of HELLOs.
753 struct CheckHelloValidatedContext;
757 * Entry in map of all HELLOs awaiting validation.
759 struct ValidationEntry
763 * NULL if this entry is not part of a larger HELLO validation.
765 struct CheckHelloValidatedContext *chvc;
768 * The address, actually a pointer to the end
769 * of this struct. Do not free!
774 * Name of the transport.
776 char *transport_name;
779 * The public key of the peer.
781 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
784 * ID of task that will clean up this entry if we don't succeed
785 * with the validation first.
787 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
790 * At what time did we send this validation?
792 struct GNUNET_TIME_Absolute send_time;
795 * Session being validated (or NULL for none).
797 struct Session *session;
800 * Challenge number we used.
813 * Context of currently active requests to peerinfo
814 * for validation of HELLOs.
816 struct CheckHelloValidatedContext
820 * This is a doubly-linked list.
822 struct CheckHelloValidatedContext *next;
825 * This is a doubly-linked list.
827 struct CheckHelloValidatedContext *prev;
830 * Hello that we are validating.
832 const struct GNUNET_HELLO_Message *hello;
835 * Context for peerinfo iteration.
836 * NULL after we are done processing peerinfo's information.
838 struct GNUNET_PEERINFO_IteratorContext *piter;
841 * Was a HELLO known for this peer to peerinfo?
846 * Number of validation entries currently referring to this
849 unsigned int ve_count;
852 struct ATS_quality_metric
861 struct ATS_mechanism * prev;
862 struct ATS_mechanism * next;
863 struct ForeignAddressList * addr;
864 struct TransportPlugin * plugin;
865 struct ATS_peer * peer;
868 struct ATS_ressource_cost * rc;
874 struct GNUNET_PeerIdentity peer;
875 struct NeighbourList * n;
876 struct ATS_mechanism * m_head;
877 struct ATS_mechanism * m_tail;
879 /* preference value f */
887 * result of last GLPK run
893 * Ressource costs or quality metrics changed
894 * update problem before solving
896 int modified_resources;
899 * Ressource costs or quality metrics changed, update matrix
900 * update problem before solving
902 int modified_quality;
905 * Peers have connected or disconnected
906 * problem has to be recreated
908 int recreate_problem;
911 * Was the available basis invalid and we needed to rerun simplex?
913 int simplex_rerun_required;
916 * is problem currently valid and can it be solved
921 * Number of transport mechanisms in the problem
926 * Number of transport mechanisms in the problem
931 * row index where quality related rows start
936 * row index where quality related rows end
941 * row index where ressource cost related rows start
946 * row index where ressource cost related rows end
951 * column index for objective function value d
956 * column index for objective function value u
961 * column index for objective function value r
966 * column index for objective function value quality metrics
971 * column index for objective function value cost ressources
976 struct ATS_ressource_entry
978 /* index in ressources array */
980 /* depending ATSi parameter to calculcate limits */
989 /* index in ressources array */
991 /* depending ATSi parameter to calculcate limits */
993 /* cfg option to load limits */
1000 /* cofficients for the specific plugins */
1010 static struct ATS_ressource ressources[] =
1012 /* FIXME: the coefficients for the specific plugins */
1013 {1, 7, "LAN_BW_LIMIT", 0, VERY_BIG_DOUBLE_VALUE, 0, 1, 1, 2, 2, 1, 3},
1014 {2, 7, "WAN_BW_LIMIT", 0, VERY_BIG_DOUBLE_VALUE, 0, 1, 1, 2, 2, 2, 3},
1015 {3, 4, "WLAN_ENERGY_LIMIT", 0, VERY_BIG_DOUBLE_VALUE, 0, 0, 0, 0, 0, 2, 1}
1017 {4, 4, "COST_ENERGY_CONSUMPTION", VERY_BIG_DOUBLE_VALUE},
1018 {5, 5, "COST_CONNECT", VERY_BIG_DOUBLE_VALUE},
1019 {6, 6, "COST_BANDWITH_AVAILABLE", VERY_BIG_DOUBLE_VALUE},
1020 {7, 7, "COST_NETWORK_OVERHEAD", VERY_BIG_DOUBLE_VALUE},*/
1023 static int available_ressources = 3;
1031 * Time of last execution
1033 struct GNUNET_TIME_Absolute last;
1035 * Minimum intervall between two executions
1037 struct GNUNET_TIME_Relative min_delta;
1039 * Regular intervall when execution is triggered
1041 struct GNUNET_TIME_Relative exec_interval;
1043 * Maximum execution time per calculation
1045 struct GNUNET_TIME_Relative max_exec_duration;
1049 * GLPK (MLP) problem object
1055 * task to recalculate the bandwidth assignment
1057 GNUNET_SCHEDULER_TaskIdentifier ats_task;
1060 * Current state of the GLPK problem
1062 struct ATS_stat stat;
1065 * mechanisms used in current problem
1066 * needed for problem modification
1068 struct ATS_mechanism * mechanisms;
1071 * peers used in current problem
1072 * needed for problem modification
1074 struct ATS_peer * peers;
1077 * number of successful executions
1079 int successful_executions;
1082 * number with an invalid result
1084 int invalid_executions;
1087 * Maximum number of LP iterations per calculation
1092 * Dump problem to a file?
1097 * Dump solution to a file
1102 * Dump solution when minimum peers:
1107 * Dump solution when minimum addresses:
1112 * Dump solution overwrite file:
1132 * Minimum bandwidth per peer
1137 * Minimum number of connections per peer
1144 * Our HELLO message.
1146 static struct GNUNET_HELLO_Message *our_hello;
1151 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
1156 static struct GNUNET_PeerIdentity my_identity;
1161 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
1164 * Our configuration.
1166 const struct GNUNET_CONFIGURATION_Handle *cfg;
1169 * Linked list of all clients to this service.
1171 static struct TransportClient *clients;
1174 * All loaded plugins.
1176 static struct TransportPlugin *plugins;
1179 * Handle to peerinfo service.
1181 static struct GNUNET_PEERINFO_Handle *peerinfo;
1184 * All known neighbours and their HELLOs.
1186 static struct NeighbourList *neighbours;
1189 * Number of neighbours we'd like to have.
1191 static uint32_t max_connect_per_transport;
1194 * Head of linked list.
1196 static struct CheckHelloValidatedContext *chvc_head;
1199 * Tail of linked list.
1201 static struct CheckHelloValidatedContext *chvc_tail;
1204 * Map of PeerIdentities to 'struct ValidationEntry*'s (addresses
1205 * of the given peer that we are currently validating).
1207 static struct GNUNET_CONTAINER_MultiHashMap *validation_map;
1210 * Handle for reporting statistics.
1212 static struct GNUNET_STATISTICS_Handle *stats;
1215 * Handle for ats information
1217 static struct ATS_info *ats;
1219 struct ATS_quality_entry
1227 static struct ATS_quality_metric qm[] =
1229 {1, 1028, "QUALITY_NET_DISTANCE"},
1230 {2, 1034, "QUALITY_NET_DELAY"},
1232 static int available_quality_metrics = 2;
1236 * The peer specified by the given neighbour has timed-out or a plugin
1237 * has disconnected. We may either need to do nothing (other plugins
1238 * still up), or trigger a full disconnect and clean up. This
1239 * function updates our state and do the necessary notifications.
1240 * Also notifies our clients that the neighbour is now officially
1243 * @param n the neighbour list entry for the peer
1244 * @param check should we just check if all plugins
1245 * disconnected or must we ask all plugins to
1248 static void disconnect_neighbour (struct NeighbourList *n, int check);
1251 * Check the ready list for the given neighbour and if a plugin is
1252 * ready for transmission (and if we have a message), do so!
1254 * @param nexi target peer for which to transmit
1256 static void try_transmission_to_peer (struct NeighbourList *n);
1258 static void ats_shutdown ( );
1260 static void ats_notify_peer_connect (
1261 const struct GNUNET_PeerIdentity *peer,
1262 const struct GNUNET_TRANSPORT_ATS_Information *ats_data, int ats_count);
1264 static void ats_notify_peer_disconnect (
1265 const struct GNUNET_PeerIdentity *peer);
1268 static void ats_notify_ats_data (
1269 const struct GNUNET_PeerIdentity *peer,
1270 const struct GNUNET_TRANSPORT_ATS_Information *ats_data);
1273 struct ForeignAddressList * ats_get_preferred_address (
1274 struct NeighbourList *n);
1277 ats_calculate_bandwidth_distribution ();
1280 * Find an entry in the neighbour list for a particular peer.
1282 * @return NULL if not found.
1284 static struct NeighbourList *
1285 find_neighbour (const struct GNUNET_PeerIdentity *key)
1287 struct NeighbourList *head = neighbours;
1289 while ((head != NULL) &&
1290 (0 != memcmp (key, &head->id, sizeof (struct GNUNET_PeerIdentity))))
1295 static int update_addr_value (struct ForeignAddressList *fal, uint32_t value , int ats_index)
1298 int set = GNUNET_NO;
1299 for (c=0; c<available_quality_metrics; c++)
1301 if (ats_index == qm[c].atis_index)
1303 fal->quality[c].values[0] = fal->quality[c].values[1];
1304 fal->quality[c].values[1] = fal->quality[c].values[2];
1305 fal->quality[c].values[2] = value;
1307 ats->stat.modified_quality = GNUNET_YES;
1310 if (set == GNUNET_NO)
1312 for (c=0; c<available_ressources; c++)
1314 if (ats_index == ressources[c].atis_index)
1316 fal->ressources[c].c = value;
1318 ats->stat.modified_resources = GNUNET_YES;
1327 update_addr_ats (struct ForeignAddressList *fal,
1328 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
1333 for (c1=0; c1<ats_count; c1++)
1335 set = update_addr_value(fal, ntohl(ats_data[c1].value), ntohl(ats_data[c1].type));
1341 * Find an entry in the transport list for a particular transport.
1343 * @return NULL if not found.
1345 static struct TransportPlugin *
1346 find_transport (const char *short_name)
1348 struct TransportPlugin *head = plugins;
1349 while ((head != NULL) && (0 != strcmp (short_name, head->short_name)))
1355 * Is a particular peer blacklisted for a particular transport?
1357 * @param peer the peer to check for
1358 * @param plugin the plugin used to connect to the peer
1360 * @return GNUNET_YES if the peer is blacklisted, GNUNET_NO if not
1363 is_blacklisted (const struct GNUNET_PeerIdentity *peer, struct TransportPlugin *plugin)
1366 if (plugin->blacklist != NULL)
1368 if (GNUNET_CONTAINER_multihashmap_contains (plugin->blacklist, &peer->hashPubKey) == GNUNET_YES)
1371 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1372 "Peer `%s:%s' is blacklisted!\n",
1373 plugin->short_name, GNUNET_i2s (peer));
1376 GNUNET_STATISTICS_update (stats, "# blacklisted peers refused", 1, GNUNET_NO);
1386 add_peer_to_blacklist (struct GNUNET_PeerIdentity *peer,
1387 char *transport_name)
1389 struct TransportPlugin *plugin;
1391 plugin = find_transport(transport_name);
1392 if (plugin == NULL) /* Nothing to do */
1395 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1396 "Adding peer `%s' with plugin `%s' to blacklist\n",
1400 if (plugin->blacklist == NULL)
1401 plugin->blacklist = GNUNET_CONTAINER_multihashmap_create(TRANSPORT_BLACKLIST_HT_SIZE);
1402 GNUNET_assert(plugin->blacklist != NULL);
1403 GNUNET_CONTAINER_multihashmap_put(plugin->blacklist, &peer->hashPubKey,
1405 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1410 * Read the blacklist file, containing transport:peer entries.
1411 * Provided the transport is loaded, set up hashmap with these
1412 * entries to blacklist peers by transport.
1416 read_blacklist_file (const struct GNUNET_CONFIGURATION_Handle *cfg)
1423 struct GNUNET_PeerIdentity pid;
1425 struct GNUNET_CRYPTO_HashAsciiEncoded enc;
1426 unsigned int entries_found;
1427 char *transport_name;
1430 GNUNET_CONFIGURATION_get_value_filename (cfg,
1436 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1437 "Option `%s' in section `%s' not specified!\n",
1443 if (GNUNET_OK != GNUNET_DISK_file_test (fn))
1444 GNUNET_DISK_fn_write (fn, NULL, 0, GNUNET_DISK_PERM_USER_READ
1445 | GNUNET_DISK_PERM_USER_WRITE);
1446 if (0 != STAT (fn, &frstat))
1448 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1449 _("Could not read blacklist file `%s'\n"), fn);
1453 if (frstat.st_size == 0)
1456 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1457 _("Blacklist file `%s' is empty.\n"),
1463 /* FIXME: use mmap */
1464 data = GNUNET_malloc_large (frstat.st_size);
1465 GNUNET_assert(data != NULL);
1466 if (frstat.st_size !=
1467 GNUNET_DISK_fn_read (fn, data, frstat.st_size))
1469 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1470 _("Failed to read blacklist from `%s'\n"), fn);
1477 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1479 while ((frstat.st_size >= sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded)) &&
1480 (pos <= frstat.st_size - sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded)))
1483 while ((colon_pos < frstat.st_size) && (data[colon_pos] != ':') && !isspace ( (unsigned char) data[colon_pos]))
1486 if (colon_pos >= frstat.st_size)
1488 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1489 _("Syntax error in blacklist file at offset %llu, giving up!\n"),
1490 (unsigned long long) colon_pos);
1496 if (isspace( (unsigned char) data[colon_pos]))
1498 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1499 _("Syntax error in blacklist file at offset %llu, skipping bytes.\n"),
1500 (unsigned long long) colon_pos);
1502 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1506 tsize = colon_pos - pos;
1507 if ((pos >= frstat.st_size) || (pos + tsize >= frstat.st_size) || (tsize == 0))
1509 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1510 _("Syntax error in blacklist file at offset %llu, giving up!\n"),
1511 (unsigned long long) colon_pos);
1520 transport_name = GNUNET_malloc(tsize + 1);
1521 memcpy(transport_name, &data[pos], tsize);
1522 pos = colon_pos + 1;
1524 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1525 "Read transport name %s in blacklist file.\n",
1528 memcpy (&enc, &data[pos], sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded));
1529 if (!isspace ( (unsigned char) enc.encoding[sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded) - 1]))
1531 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1532 _("Syntax error in blacklist file at offset %llu, skipping bytes.\n"),
1533 (unsigned long long) pos);
1535 while ((pos < frstat.st_size) && (!isspace ( (unsigned char) data[pos])))
1537 GNUNET_free_non_null(transport_name);
1540 enc.encoding[sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded) - 1] = '\0';
1541 if (GNUNET_OK != GNUNET_CRYPTO_hash_from_string ((char *) &enc, &pid.hashPubKey))
1543 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1544 _("Syntax error in blacklist file at offset %llu, skipping bytes `%s'.\n"),
1545 (unsigned long long) pos,
1550 if (0 != memcmp (&pid,
1552 sizeof (struct GNUNET_PeerIdentity)))
1555 add_peer_to_blacklist (&pid,
1560 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1561 _("Found myself `%s' in blacklist (useless, ignored)\n"),
1565 pos = pos + sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded);
1566 GNUNET_free_non_null(transport_name);
1567 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1570 GNUNET_STATISTICS_update (stats, "# Transport entries blacklisted", entries_found, GNUNET_NO);
1577 * Function called to notify a client about the socket being ready to
1578 * queue more data. "buf" will be NULL and "size" zero if the socket
1579 * was closed for writing in the meantime.
1581 * @param cls closure
1582 * @param size number of bytes available in buf
1583 * @param buf where the callee should write the message
1584 * @return number of bytes written to buf
1587 transmit_to_client_callback (void *cls, size_t size, void *buf)
1589 struct TransportClient *client = cls;
1590 struct ClientMessageQueueEntry *q;
1593 const struct GNUNET_MessageHeader *msg;
1600 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1601 "Transmission to client failed, closing connection.\n");
1603 /* fatal error with client, free message queue! */
1604 while (NULL != (q = client->message_queue_head))
1606 GNUNET_STATISTICS_update (stats,
1607 gettext_noop ("# bytes discarded (could not transmit to client)"),
1608 ntohs (((const struct GNUNET_MessageHeader*)&q[1])->size),
1610 GNUNET_CONTAINER_DLL_remove (client->message_queue_head,
1611 client->message_queue_tail,
1615 client->message_count = 0;
1620 while (NULL != (q = client->message_queue_head))
1622 msg = (const struct GNUNET_MessageHeader *) &q[1];
1623 msize = ntohs (msg->size);
1624 if (msize + tsize > size)
1627 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1628 "Transmitting message of type %u to client.\n",
1631 GNUNET_CONTAINER_DLL_remove (client->message_queue_head,
1632 client->message_queue_tail,
1634 memcpy (&cbuf[tsize], msg, msize);
1637 client->message_count--;
1641 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
1642 client->th = GNUNET_SERVER_notify_transmit_ready (client->client,
1644 GNUNET_TIME_UNIT_FOREVER_REL,
1645 &transmit_to_client_callback,
1647 GNUNET_assert (client->th != NULL);
1654 * Convert an address to a string.
1656 * @param plugin name of the plugin responsible for the address
1657 * @param addr binary address
1658 * @param addr_len number of bytes in addr
1659 * @return NULL on error, otherwise address string
1662 a2s (const char *plugin,
1666 struct TransportPlugin *p;
1670 p = find_transport (plugin);
1673 return p->api->address_to_string (p->api->cls,
1680 * Mark the given FAL entry as 'connected' (and hence preferred for
1681 * sending); also mark all others for the same peer as 'not connected'
1682 * (since only one can be preferred).
1684 * @param fal address to set to 'connected'
1687 mark_address_connected (struct ForeignAddressList *fal)
1689 struct ForeignAddressList *pos;
1692 GNUNET_assert (GNUNET_YES == fal->validated);
1693 if (fal->connected == GNUNET_YES)
1694 return; /* nothing to do */
1696 pos = fal->ready_list->addresses;
1699 if (GNUNET_YES == pos->connected)
1702 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1703 "Marking address `%s' as no longer connected (due to connect on other address)\n",
1704 a2s (pos->ready_list->plugin->short_name,
1708 GNUNET_break (cnt == GNUNET_YES);
1710 pos->connected = GNUNET_NO;
1711 GNUNET_STATISTICS_update (stats,
1712 gettext_noop ("# connected addresses"),
1718 fal->connected = GNUNET_YES;
1719 if (GNUNET_YES == cnt)
1721 GNUNET_STATISTICS_update (stats,
1722 gettext_noop ("# connected addresses"),
1730 * Send the specified message to the specified client. Since multiple
1731 * messages may be pending for the same client at a time, this code
1732 * makes sure that no message is lost.
1734 * @param client client to transmit the message to
1735 * @param msg the message to send
1736 * @param may_drop can this message be dropped if the
1737 * message queue for this client is getting far too large?
1740 transmit_to_client (struct TransportClient *client,
1741 const struct GNUNET_MessageHeader *msg, int may_drop)
1743 struct ClientMessageQueueEntry *q;
1746 if ((client->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
1748 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1750 ("Dropping message of type %u and size %u, have %u messages pending (%u is the soft limit)\n"),
1753 client->message_count,
1755 GNUNET_STATISTICS_update (stats,
1756 gettext_noop ("# messages dropped due to slow client"),
1761 msize = ntohs (msg->size);
1762 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
1763 q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
1764 memcpy (&q[1], msg, msize);
1765 GNUNET_CONTAINER_DLL_insert_after (client->message_queue_head,
1766 client->message_queue_tail,
1767 client->message_queue_tail,
1769 client->message_count++;
1770 if (client->th == NULL)
1772 client->th = GNUNET_SERVER_notify_transmit_ready (client->client,
1774 GNUNET_TIME_UNIT_FOREVER_REL,
1775 &transmit_to_client_callback,
1777 GNUNET_assert (client->th != NULL);
1783 * Transmit a 'SEND_OK' notification to the given client for the
1786 * @param client who to notify
1787 * @param n neighbour to notify about, can be NULL (on failure)
1788 * @param target target of the transmission
1789 * @param result status code for the transmission request
1792 transmit_send_ok (struct TransportClient *client,
1793 struct NeighbourList *n,
1794 const struct GNUNET_PeerIdentity *target,
1797 struct SendOkMessage send_ok_msg;
1799 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
1800 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
1801 send_ok_msg.success = htonl (result);
1803 send_ok_msg.latency = GNUNET_TIME_relative_hton (n->latency);
1805 send_ok_msg.latency = GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
1806 send_ok_msg.peer = *target;
1807 transmit_to_client (client, &send_ok_msg.header, GNUNET_NO);
1812 * Function called by the GNUNET_TRANSPORT_TransmitFunction
1813 * upon "completion" of a send request. This tells the API
1814 * that it is now legal to send another message to the given
1817 * @param cls closure, identifies the entry on the
1818 * message queue that was transmitted and the
1819 * client responsible for queuing the message
1820 * @param target the peer receiving the message
1821 * @param result GNUNET_OK on success, if the transmission
1822 * failed, we should not tell the client to transmit
1826 transmit_send_continuation (void *cls,
1827 const struct GNUNET_PeerIdentity *target,
1830 struct MessageQueue *mq = cls;
1831 struct NeighbourList *n;
1833 GNUNET_STATISTICS_update (stats,
1834 gettext_noop ("# bytes pending with plugins"),
1835 - (int64_t) mq->message_buf_size,
1837 if (result == GNUNET_OK)
1839 GNUNET_STATISTICS_update (stats,
1840 gettext_noop ("# bytes successfully transmitted by plugins"),
1841 mq->message_buf_size,
1846 GNUNET_STATISTICS_update (stats,
1847 gettext_noop ("# bytes with transmission failure by plugins"),
1848 mq->message_buf_size,
1851 if (mq->specific_address != NULL)
1853 if (result == GNUNET_OK)
1855 mq->specific_address->timeout =
1856 GNUNET_TIME_relative_to_absolute
1857 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
1858 if (mq->specific_address->validated == GNUNET_YES)
1859 mark_address_connected (mq->specific_address);
1863 if (mq->specific_address->connected != GNUNET_NO)
1866 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1867 "Marking address `%s' as no longer connected (due to transmission problem)\n",
1868 a2s (mq->specific_address->ready_list->plugin->short_name,
1869 mq->specific_address->addr,
1870 mq->specific_address->addrlen));
1872 GNUNET_STATISTICS_update (stats,
1873 gettext_noop ("# connected addresses"),
1876 mq->specific_address->connected = GNUNET_NO;
1879 if (! mq->internal_msg)
1880 mq->specific_address->in_transmit = GNUNET_NO;
1882 n = find_neighbour(&mq->neighbour_id);
1883 if (mq->client != NULL)
1884 transmit_send_ok (mq->client, n, target, result);
1887 try_transmission_to_peer (n);
1892 * Find an address in any of the available transports for
1893 * the given neighbour that would be good for message
1894 * transmission. This is essentially the transport selection
1897 * @param neighbour for whom to select an address
1898 * @return selected address, NULL if we have none
1900 struct ForeignAddressList *
1901 find_ready_address(struct NeighbourList *neighbour)
1903 struct ReadyList *head = neighbour->plugins;
1904 struct ForeignAddressList *addresses;
1905 struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
1906 struct ForeignAddressList *best_address;
1908 /* Hack to prefer unix domain sockets */
1909 struct ForeignAddressList *unix_address = NULL;
1911 best_address = NULL;
1912 while (head != NULL)
1914 addresses = head->addresses;
1915 while (addresses != NULL)
1917 if ( (addresses->timeout.abs_value < now.abs_value) &&
1918 (addresses->connected == GNUNET_YES) )
1921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1922 "Marking long-time inactive connection to `%4s' as down.\n",
1923 GNUNET_i2s (&neighbour->id));
1925 GNUNET_STATISTICS_update (stats,
1926 gettext_noop ("# connected addresses"),
1929 addresses->connected = GNUNET_NO;
1931 addresses = addresses->next;
1934 addresses = head->addresses;
1935 while (addresses != NULL)
1937 #if DEBUG_TRANSPORT > 1
1938 if (addresses->addr != NULL)
1939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1940 "Have address `%s' for peer `%4s' (status: %d, %d, %d, %u, %llums, %u)\n",
1941 a2s (head->plugin->short_name,
1943 addresses->addrlen),
1944 GNUNET_i2s (&neighbour->id),
1945 addresses->connected,
1946 addresses->in_transmit,
1947 addresses->validated,
1948 addresses->connect_attempts,
1949 (unsigned long long) addresses->timeout.abs_value,
1950 (unsigned int) addresses->distance);
1952 if (0==strcmp(head->plugin->short_name,"unix"))
1954 if ((unix_address == NULL) || ((unix_address != NULL) &&
1955 (addresses->latency.rel_value < unix_address->latency.rel_value)))
1956 unix_address = addresses;
1958 if ( ( (best_address == NULL) ||
1959 (addresses->connected == GNUNET_YES) ||
1960 (best_address->connected == GNUNET_NO) ) &&
1961 (addresses->in_transmit == GNUNET_NO) &&
1962 ( (best_address == NULL) ||
1963 (addresses->latency.rel_value < best_address->latency.rel_value)) )
1964 best_address = addresses;
1965 /* FIXME: also give lower-latency addresses that are not
1966 connected a chance some times... */
1967 addresses = addresses->next;
1969 if (unix_address != NULL)
1973 if (unix_address != NULL)
1975 best_address = unix_address;
1977 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found unix address, forced this address\n");
1980 if (best_address != NULL)
1984 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1985 "Best address found (`%s') has latency of %llu ms.\n",
1986 (best_address->addrlen > 0)
1987 ? a2s (best_address->ready_list->plugin->short_name,
1989 best_address->addrlen)
1991 best_address->latency.rel_value);
1996 GNUNET_STATISTICS_update (stats,
1997 gettext_noop ("# transmission attempts failed (no address)"),
2002 return best_address;
2008 * We should re-try transmitting to the given peer,
2009 * hopefully we've learned something in the meantime.
2012 retry_transmission_task (void *cls,
2013 const struct GNUNET_SCHEDULER_TaskContext *tc)
2015 struct NeighbourList *n = cls;
2017 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
2018 try_transmission_to_peer (n);
2023 * Check the ready list for the given neighbour and if a plugin is
2024 * ready for transmission (and if we have a message), do so!
2026 * @param neighbour target peer for which to transmit
2029 try_transmission_to_peer (struct NeighbourList *n)
2031 struct ReadyList *rl;
2032 struct MessageQueue *mq;
2033 struct GNUNET_TIME_Relative timeout;
2037 if (n->messages_head == NULL)
2040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2041 "Transmission queue for `%4s' is empty\n",
2042 GNUNET_i2s (&n->id));
2044 return; /* nothing to do */
2047 mq = n->messages_head;
2048 force_address = GNUNET_YES;
2049 if (mq->specific_address == NULL)
2052 mq->specific_address = ats_get_preferred_address(n);
2053 GNUNET_STATISTICS_update (stats,
2054 gettext_noop ("# transport selected peer address freely"),
2057 force_address = GNUNET_NO;
2059 if (mq->specific_address == NULL)
2061 GNUNET_STATISTICS_update (stats,
2062 gettext_noop ("# transport failed to selected peer address"),
2065 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
2066 if (timeout.rel_value == 0)
2069 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2070 "No destination address available to transmit message of size %u to peer `%4s'\n",
2071 mq->message_buf_size,
2072 GNUNET_i2s (&mq->neighbour_id));
2074 GNUNET_STATISTICS_update (stats,
2075 gettext_noop ("# bytes in message queue for other peers"),
2076 - (int64_t) mq->message_buf_size,
2078 GNUNET_STATISTICS_update (stats,
2079 gettext_noop ("# bytes discarded (no destination address available)"),
2080 mq->message_buf_size,
2082 if (mq->client != NULL)
2083 transmit_send_ok (mq->client, n, &n->id, GNUNET_NO);
2084 GNUNET_CONTAINER_DLL_remove (n->messages_head,
2088 return; /* nobody ready */
2090 GNUNET_STATISTICS_update (stats,
2091 gettext_noop ("# message delivery deferred (no address)"),
2094 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
2095 GNUNET_SCHEDULER_cancel (n->retry_task);
2096 n->retry_task = GNUNET_SCHEDULER_add_delayed (timeout,
2097 &retry_transmission_task,
2100 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2101 "No validated destination address available to transmit message of size %u to peer `%4s', will wait %llums to find an address.\n",
2102 mq->message_buf_size,
2103 GNUNET_i2s (&mq->neighbour_id),
2106 /* FIXME: might want to trigger peerinfo lookup here
2107 (unless that's already pending...) */
2110 GNUNET_CONTAINER_DLL_remove (n->messages_head,
2113 if (mq->specific_address->connected == GNUNET_NO)
2114 mq->specific_address->connect_attempts++;
2115 rl = mq->specific_address->ready_list;
2116 mq->plugin = rl->plugin;
2117 if (!mq->internal_msg)
2118 mq->specific_address->in_transmit = GNUNET_YES;
2120 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2121 "Sending message of size %u for `%4s' to `%s' via plugin `%s'\n",
2122 mq->message_buf_size,
2123 GNUNET_i2s (&n->id),
2124 (mq->specific_address->addr != NULL)
2125 ? a2s (mq->plugin->short_name,
2126 mq->specific_address->addr,
2127 mq->specific_address->addrlen)
2129 rl->plugin->short_name);
2131 GNUNET_STATISTICS_update (stats,
2132 gettext_noop ("# bytes in message queue for other peers"),
2133 - (int64_t) mq->message_buf_size,
2135 GNUNET_STATISTICS_update (stats,
2136 gettext_noop ("# bytes pending with plugins"),
2137 mq->message_buf_size,
2139 ret = rl->plugin->api->send (rl->plugin->api->cls,
2142 mq->message_buf_size,
2144 GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
2145 mq->specific_address->session,
2146 mq->specific_address->addr,
2147 mq->specific_address->addrlen,
2149 &transmit_send_continuation, mq);
2152 /* failure, but 'send' would not call continuation in this case,
2153 so we need to do it here! */
2154 transmit_send_continuation (mq,
2162 * Send the specified message to the specified peer.
2164 * @param client source of the transmission request (can be NULL)
2165 * @param peer_address ForeignAddressList where we should send this message
2166 * @param priority how important is the message
2167 * @param timeout how long do we have to transmit?
2168 * @param message_buf message(s) to send GNUNET_MessageHeader(s)
2169 * @param message_buf_size total size of all messages in message_buf
2170 * @param is_internal is this an internal message; these are pre-pended and
2171 * also do not count for plugins being "ready" to transmit
2172 * @param neighbour handle to the neighbour for transmission
2175 transmit_to_peer (struct TransportClient *client,
2176 struct ForeignAddressList *peer_address,
2177 unsigned int priority,
2178 struct GNUNET_TIME_Relative timeout,
2179 const char *message_buf,
2180 size_t message_buf_size,
2181 int is_internal, struct NeighbourList *neighbour)
2183 struct MessageQueue *mq;
2188 /* check for duplicate submission */
2189 mq = neighbour->messages_head;
2192 if (mq->client == client)
2194 /* client transmitted to same peer twice
2195 before getting SEND_OK! */
2203 GNUNET_STATISTICS_update (stats,
2204 gettext_noop ("# bytes in message queue for other peers"),
2207 mq = GNUNET_malloc (sizeof (struct MessageQueue) + message_buf_size);
2208 mq->specific_address = peer_address;
2209 mq->client = client;
2210 /* FIXME: this memcpy can be up to 7% of our total runtime! */
2211 memcpy (&mq[1], message_buf, message_buf_size);
2212 mq->message_buf = (const char*) &mq[1];
2213 mq->message_buf_size = message_buf_size;
2214 memcpy(&mq->neighbour_id, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
2215 mq->internal_msg = is_internal;
2216 mq->priority = priority;
2217 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
2219 GNUNET_CONTAINER_DLL_insert (neighbour->messages_head,
2220 neighbour->messages_tail,
2223 GNUNET_CONTAINER_DLL_insert_after (neighbour->messages_head,
2224 neighbour->messages_tail,
2225 neighbour->messages_tail,
2227 try_transmission_to_peer (neighbour);
2234 struct GeneratorContext
2236 struct TransportPlugin *plug_pos;
2237 struct OwnAddressList *addr_pos;
2238 struct GNUNET_TIME_Absolute expiration;
2246 address_generator (void *cls, size_t max, void *buf)
2248 struct GeneratorContext *gc = cls;
2251 while ((gc->addr_pos == NULL) && (gc->plug_pos != NULL))
2253 gc->plug_pos = gc->plug_pos->next;
2254 gc->addr_pos = (gc->plug_pos != NULL) ? gc->plug_pos->addresses : NULL;
2256 if (NULL == gc->plug_pos)
2261 ret = GNUNET_HELLO_add_address (gc->plug_pos->short_name,
2264 gc->addr_pos->addrlen, buf, max);
2265 gc->addr_pos = gc->addr_pos->next;
2271 * Construct our HELLO message from all of the addresses of
2272 * all of the transports.
2277 struct GNUNET_HELLO_Message *hello;
2278 struct TransportClient *cpos;
2279 struct NeighbourList *npos;
2280 struct GeneratorContext gc;
2282 gc.plug_pos = plugins;
2283 gc.addr_pos = plugins != NULL ? plugins->addresses : NULL;
2284 gc.expiration = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
2285 hello = GNUNET_HELLO_create (&my_public_key, &address_generator, &gc);
2287 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2288 "Refreshed my `%s', new size is %d\n", "HELLO", GNUNET_HELLO_size(hello));
2290 GNUNET_STATISTICS_update (stats,
2291 gettext_noop ("# refreshed my HELLO"),
2295 while (cpos != NULL)
2297 transmit_to_client (cpos,
2298 (const struct GNUNET_MessageHeader *) hello,
2303 GNUNET_free_non_null (our_hello);
2305 GNUNET_PEERINFO_add_peer (peerinfo, our_hello);
2307 while (npos != NULL)
2310 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2311 "Transmitting updated `%s' to neighbour `%4s'\n",
2312 "HELLO", GNUNET_i2s (&npos->id));
2314 GNUNET_STATISTICS_update (stats,
2315 gettext_noop ("# transmitted my HELLO to other peers"),
2318 transmit_to_peer (NULL, NULL, 0,
2319 HELLO_ADDRESS_EXPIRATION,
2320 (const char *) our_hello,
2321 GNUNET_HELLO_size(our_hello),
2329 * Task used to clean up expired addresses for a plugin.
2331 * @param cls closure
2335 expire_address_task (void *cls,
2336 const struct GNUNET_SCHEDULER_TaskContext *tc);
2340 * Update the list of addresses for this plugin,
2341 * expiring those that are past their expiration date.
2343 * @param plugin addresses of which plugin should be recomputed?
2344 * @param fresh set to GNUNET_YES if a new address was added
2345 * and we need to regenerate the HELLO even if nobody
2349 update_addresses (struct TransportPlugin *plugin,
2352 static struct GNUNET_TIME_Absolute last_update;
2353 struct GNUNET_TIME_Relative min_remaining;
2354 struct GNUNET_TIME_Relative remaining;
2355 struct GNUNET_TIME_Absolute now;
2356 struct OwnAddressList *pos;
2357 struct OwnAddressList *prev;
2358 struct OwnAddressList *next;
2361 if (plugin->address_update_task != GNUNET_SCHEDULER_NO_TASK)
2362 GNUNET_SCHEDULER_cancel (plugin->address_update_task);
2363 plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
2364 now = GNUNET_TIME_absolute_get ();
2365 min_remaining = GNUNET_TIME_UNIT_FOREVER_REL;
2366 expired = (GNUNET_TIME_absolute_get_duration (last_update).rel_value > (HELLO_ADDRESS_EXPIRATION.rel_value / 4));
2368 pos = plugin->addresses;
2372 if (pos->expires.abs_value < now.abs_value)
2374 expired = GNUNET_YES;
2376 plugin->addresses = pos->next;
2378 prev->next = pos->next;
2383 remaining = GNUNET_TIME_absolute_get_remaining (pos->expires);
2384 if (remaining.rel_value < min_remaining.rel_value)
2385 min_remaining = remaining;
2391 if (expired || fresh)
2396 min_remaining = GNUNET_TIME_relative_min (min_remaining,
2397 GNUNET_TIME_relative_divide (HELLO_ADDRESS_EXPIRATION,
2399 plugin->address_update_task
2400 = GNUNET_SCHEDULER_add_delayed (min_remaining,
2401 &expire_address_task, plugin);
2406 * Task used to clean up expired addresses for a plugin.
2408 * @param cls closure
2412 expire_address_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2414 struct TransportPlugin *plugin = cls;
2416 plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
2417 if (0 == (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2418 update_addresses (plugin, GNUNET_NO);
2423 * Iterator over hash map entries that NULLs the session of validation
2424 * entries that match the given session.
2426 * @param cls closure (the 'struct Session*' to match against)
2427 * @param key current key code (peer ID, not used)
2428 * @param value value in the hash map ('struct ValidationEntry*')
2429 * @return GNUNET_YES (we should continue to iterate)
2432 remove_session_validations (void *cls,
2433 const GNUNET_HashCode * key,
2436 struct Session *session = cls;
2437 struct ValidationEntry *ve = value;
2439 if (session == ve->session)
2446 * We've been disconnected from the other peer (for some
2447 * connection-oriented transport). Either quickly
2448 * re-establish the connection or signal the disconnect
2451 * Only signal CORE level disconnect if ALL addresses
2452 * for the peer are exhausted.
2454 * @param p overall plugin context
2455 * @param nl neighbour that was disconnected
2458 try_fast_reconnect (struct TransportPlugin *p,
2459 struct NeighbourList *nl)
2461 /* FIXME-MW: fast reconnect / transport switching not implemented... */
2462 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2463 "try_fast_reconnect not implemented!\n");
2464 /* Note: the idea here is to hide problems with transports (or
2465 switching between plugins) from the core to eliminate the need to
2466 re-negotiate session keys and the like; OTOH, we should tell core
2467 quickly (much faster than timeout) `if a connection was lost and
2468 could not be re-established (i.e. other peer went down or is
2469 unable / refuses to communicate);
2471 So we should consider:
2472 1) ideally: our own willingness / need to connect
2473 2) prior failures to connect to this peer (by plugin)
2474 3) ideally: reasons why other peer terminated (as far as knowable)
2476 Most importantly, it must be POSSIBLE for another peer to terminate
2477 a connection for a while (without us instantly re-establishing it).
2478 Similarly, if another peer is gone we should quickly notify CORE.
2479 OTOH, if there was a minor glitch (i.e. crash of gnunet-service-transport
2480 on the other end), we should reconnect in such a way that BOTH CORE
2481 services never even notice.
2482 Furthermore, the same mechanism (or small variation) could be used
2483 to switch to a better-performing plugin (ATS).
2485 Finally, this needs to be tested throughly... */
2488 * GNUNET_NO in the call below makes transport disconnect the peer,
2489 * even if only a single address (out of say, six) went away. This
2490 * function must be careful to ONLY disconnect if the peer is gone,
2491 * not just a specifi address.
2493 * More specifically, half the places it was used had it WRONG.
2496 /* No reconnect, signal disconnect instead! */
2498 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2499 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&nl->id),
2500 "try_fast_reconnect");
2502 disconnect_neighbour (nl, GNUNET_YES);
2507 * Function that will be called whenever the plugin internally
2508 * cleans up a session pointer and hence the service needs to
2509 * discard all of those sessions as well. Plugins that do not
2510 * use sessions can simply omit calling this function and always
2511 * use NULL wherever a session pointer is needed.
2513 * @param cls closure
2514 * @param peer which peer was the session for
2515 * @param session which session is being destoyed
2518 plugin_env_session_end (void *cls,
2519 const struct GNUNET_PeerIdentity *peer,
2520 struct Session *session)
2522 struct TransportPlugin *p = cls;
2523 struct NeighbourList *nl;
2524 struct ReadyList *rl;
2525 struct ForeignAddressList *pos;
2526 struct ForeignAddressList *prev;
2529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2530 "Session ended with peer `%4s', %s\n",
2532 "plugin_env_session_end");
2534 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
2535 &remove_session_validations,
2537 nl = find_neighbour (peer);
2541 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2542 "No neighbour record found for peer `%4s'\n",
2545 return; /* was never marked as connected */
2550 if (rl->plugin == p)
2557 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2558 "Plugin was associated with peer `%4s'\n",
2561 disconnect_neighbour (nl, GNUNET_YES);
2565 pos = rl->addresses;
2566 while ( (pos != NULL) &&
2567 (pos->session != session) )
2575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2576 "Session was never marked as ready for peer `%4s'\n",
2579 //FIXME: This conflicts with inbound tcp connections and tcp nat ... debugging in progress
2580 //disconnect_neighbour (nl, GNUNET_YES);
2581 return; /* was never marked as connected */
2583 pos->session = NULL;
2584 if (pos->addrlen != 0)
2586 if (nl->received_pong != GNUNET_NO)
2587 try_fast_reconnect (p, nl);
2589 disconnect_neighbour (nl, GNUNET_YES);
2592 /* was inbound connection, free 'pos' */
2594 rl->addresses = pos->next;
2596 prev->next = pos->next;
2597 if (GNUNET_SCHEDULER_NO_TASK != pos->revalidate_task)
2599 GNUNET_SCHEDULER_cancel (pos->revalidate_task);
2600 pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
2602 GNUNET_free_non_null(pos->ressources);
2603 GNUNET_free_non_null(pos->quality);
2605 ats->stat.recreate_problem = GNUNET_YES;
2606 if (nl->received_pong == GNUNET_NO)
2608 disconnect_neighbour (nl, GNUNET_YES);
2609 return; /* nothing to do, never connected... */
2611 /* check if we have any validated addresses left */
2612 pos = rl->addresses;
2617 try_fast_reconnect (p, nl);
2622 /* no valid addresses left, signal disconnect! */
2625 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2626 "Disconnecting peer `%4s', %s\n",
2628 "plugin_env_session_end");
2630 /* FIXME: This doesn't mean there are no addresses left for this PEER,
2631 * it means there aren't any left for this PLUGIN/PEER combination! So
2632 * calling disconnect_neighbour here with GNUNET_NO forces disconnect
2633 * when it isn't necessary. Using GNUNET_YES at least checks to see
2634 * if there are any addresses that work first, so as not to overdo it.
2637 disconnect_neighbour (nl, GNUNET_YES);
2642 * Function that must be called by each plugin to notify the
2643 * transport service about the addresses under which the transport
2644 * provided by the plugin can be reached.
2646 * @param cls closure
2647 * @param name name of the transport that generated the address
2648 * @param addr one of the addresses of the host, NULL for the last address
2649 * the specific address format depends on the transport
2650 * @param addrlen length of the address
2651 * @param expires when should this address automatically expire?
2654 plugin_env_notify_address (void *cls,
2658 struct GNUNET_TIME_Relative expires)
2660 struct TransportPlugin *p = cls;
2661 struct OwnAddressList *al;
2662 struct GNUNET_TIME_Absolute abex;
2664 GNUNET_assert (addr != NULL);
2665 abex = GNUNET_TIME_relative_to_absolute (expires);
2666 GNUNET_assert (p == find_transport (name));
2670 if ( (addrlen == al->addrlen) &&
2671 (0 == memcmp (addr, &al[1], addrlen)) )
2674 update_addresses (p, GNUNET_NO);
2679 al = GNUNET_malloc (sizeof (struct OwnAddressList) + addrlen);
2680 al->next = p->addresses;
2683 al->addrlen = addrlen;
2684 memcpy (&al[1], addr, addrlen);
2685 update_addresses (p, GNUNET_YES);
2690 * Notify all of our clients about a peer connecting.
2693 notify_clients_connect (const struct GNUNET_PeerIdentity *peer,
2694 struct GNUNET_TIME_Relative latency,
2697 struct ConnectInfoMessage * cim;
2698 struct TransportClient *cpos;
2703 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2704 "Notifying clients about connection from `%s'\n",
2707 GNUNET_STATISTICS_update (stats,
2708 gettext_noop ("# peers connected"),
2713 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
2714 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
2718 cim = GNUNET_malloc (size);
2720 cim->header.size = htons (size);
2721 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
2722 cim->ats_count = htonl(2);
2723 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
2724 (&(cim->ats))[0].value = htonl (distance);
2725 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
2726 (&(cim->ats))[1].value = htonl ((uint32_t) latency.rel_value);
2727 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
2728 (&(cim->ats))[2].value = htonl (0);
2729 memcpy (&cim->id, peer, sizeof (struct GNUNET_PeerIdentity));
2731 /* notify ats about connecting peer */
2732 ats_notify_peer_connect (peer, &(cim->ats), 2);
2735 while (cpos != NULL)
2737 transmit_to_client (cpos, &(cim->header), GNUNET_NO);
2746 * Notify all of our clients about a peer disconnecting.
2749 notify_clients_disconnect (const struct GNUNET_PeerIdentity *peer)
2751 struct DisconnectInfoMessage dim;
2752 struct TransportClient *cpos;
2755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2756 "Notifying clients about lost connection to `%s'\n",
2759 GNUNET_STATISTICS_update (stats,
2760 gettext_noop ("# peers connected"),
2763 dim.header.size = htons (sizeof (struct DisconnectInfoMessage));
2764 dim.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
2765 dim.reserved = htonl (0);
2766 memcpy (&dim.peer, peer, sizeof (struct GNUNET_PeerIdentity));
2768 /* notify ats about connecting peer */
2769 ats_notify_peer_disconnect (peer);
2772 while (cpos != NULL)
2774 transmit_to_client (cpos, &dim.header, GNUNET_NO);
2781 * Find a ForeignAddressList entry for the given neighbour
2782 * that matches the given address and transport.
2784 * @param neighbour which peer we care about
2785 * @param tname name of the transport plugin
2786 * @param session session to look for, NULL for 'any'; otherwise
2787 * can be used for the service to "learn" this session ID
2789 * @param addr binary address
2790 * @param addrlen length of addr
2791 * @return NULL if no such entry exists
2793 static struct ForeignAddressList *
2794 find_peer_address(struct NeighbourList *neighbour,
2796 struct Session *session,
2800 struct ReadyList *head;
2801 struct ForeignAddressList *pos;
2803 head = neighbour->plugins;
2804 while (head != NULL)
2806 if (0 == strcmp (tname, head->plugin->short_name))
2812 pos = head->addresses;
2813 while ( (pos != NULL) &&
2814 ( (pos->addrlen != addrlen) ||
2815 (memcmp(pos->addr, addr, addrlen) != 0) ) )
2817 if ( (session != NULL) &&
2818 (pos->session == session) )
2822 if ( (session != NULL) && (pos != NULL) )
2823 pos->session = session; /* learn it! */
2829 * Get the peer address struct for the given neighbour and
2830 * address. If it doesn't yet exist, create it.
2832 * @param neighbour which peer we care about
2833 * @param tname name of the transport plugin
2834 * @param session session of the plugin, or NULL for none
2835 * @param addr binary address
2836 * @param addrlen length of addr
2837 * @return NULL if we do not have a transport plugin for 'tname'
2839 static struct ForeignAddressList *
2840 add_peer_address (struct NeighbourList *neighbour,
2842 struct Session *session,
2846 struct ReadyList *head;
2847 struct ForeignAddressList *ret;
2850 ret = find_peer_address (neighbour, tname, session, addr, addrlen);
2853 head = neighbour->plugins;
2855 while (head != NULL)
2857 if (0 == strcmp (tname, head->plugin->short_name))
2863 ret = GNUNET_malloc(sizeof(struct ForeignAddressList) + addrlen);
2864 ret->session = session;
2865 if ((addrlen > 0) && (addr != NULL))
2867 ret->addr = (const char*) &ret[1];
2868 memcpy (&ret[1], addr, addrlen);
2875 ret->ressources = GNUNET_malloc(available_ressources * sizeof (struct ATS_ressource_entry));
2876 for (c=0; c<available_ressources; c++)
2878 struct ATS_ressource_entry *r = ret->ressources;
2880 r[c].atis_index = ressources[c].atis_index;
2881 if (0 == strcmp(neighbour->plugins->plugin->short_name,"unix"))
2883 r[c].c = ressources[c].c_unix;
2885 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"udp"))
2887 r[c].c = ressources[c].c_udp;
2889 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"tcp"))
2891 r[c].c = ressources[c].c_tcp;
2893 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"http"))
2895 r[c].c = ressources[c].c_http;
2897 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"https"))
2899 r[c].c = ressources[c].c_https;
2901 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"wlan"))
2903 r[c].c = ressources[c].c_wlan;
2907 r[c].c = ressources[c].c_default;
2908 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2909 "Assigning default cost to peer `%s' addr plugin `%s'! This should not happen!\n",
2910 GNUNET_i2s(&neighbour->peer),
2911 neighbour->plugins->plugin->short_name);
2915 ret->quality = GNUNET_malloc (available_quality_metrics * sizeof (struct ATS_quality_entry));
2916 ret->addrlen = addrlen;
2917 ret->expires = GNUNET_TIME_relative_to_absolute
2918 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2919 ret->latency = GNUNET_TIME_relative_get_forever();
2921 ret->timeout = GNUNET_TIME_relative_to_absolute
2922 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2923 ret->ready_list = head;
2924 ret->next = head->addresses;
2925 head->addresses = ret;
2931 * Closure for 'add_validated_address'.
2933 struct AddValidatedAddressContext
2936 * Entry that has been validated.
2938 const struct ValidationEntry *ve;
2941 * Flag set after we have added the address so
2942 * that we terminate the iteration next time.
2949 * Callback function used to fill a buffer of max bytes with a list of
2950 * addresses in the format used by HELLOs. Should use
2951 * "GNUNET_HELLO_add_address" as a helper function.
2953 * @param cls the 'struct AddValidatedAddressContext' with the validated address
2954 * @param max maximum number of bytes that can be written to buf
2955 * @param buf where to write the address information
2956 * @return number of bytes written, 0 to signal the
2957 * end of the iteration.
2960 add_validated_address (void *cls,
2961 size_t max, void *buf)
2963 struct AddValidatedAddressContext *avac = cls;
2964 const struct ValidationEntry *ve = avac->ve;
2966 if (GNUNET_YES == avac->done)
2968 avac->done = GNUNET_YES;
2969 return GNUNET_HELLO_add_address (ve->transport_name,
2970 GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION),
2980 * Closure for 'check_address_exists'.
2982 struct CheckAddressExistsClosure
2985 * Address to check for.
2990 * Name of the transport.
2997 struct Session *session;
3000 * Set to GNUNET_YES if the address exists.
3013 * Iterator over hash map entries. Checks if the given
3014 * validation entry is for the same address as what is given
3017 * @param cls the 'struct CheckAddressExistsClosure*'
3018 * @param key current key code (ignored)
3019 * @param value value in the hash map ('struct ValidationEntry')
3020 * @return GNUNET_YES if we should continue to
3021 * iterate (mismatch), GNUNET_NO if not (entry matched)
3024 check_address_exists (void *cls,
3025 const GNUNET_HashCode * key,
3028 struct CheckAddressExistsClosure *caec = cls;
3029 struct ValidationEntry *ve = value;
3031 if ( (0 == strcmp (caec->tname,
3032 ve->transport_name)) &&
3033 (caec->addrlen == ve->addrlen) &&
3034 (0 == memcmp (caec->addr,
3038 caec->exists = GNUNET_YES;
3041 if ( (ve->session != NULL) &&
3042 (caec->session == ve->session) )
3044 caec->exists = GNUNET_YES;
3053 * Iterator to free entries in the validation_map.
3055 * @param cls closure (unused)
3056 * @param key current key code
3057 * @param value value in the hash map (validation to abort)
3058 * @return GNUNET_YES (always)
3061 abort_validation (void *cls,
3062 const GNUNET_HashCode * key,
3065 struct ValidationEntry *va = value;
3067 if (GNUNET_SCHEDULER_NO_TASK != va->timeout_task)
3068 GNUNET_SCHEDULER_cancel (va->timeout_task);
3069 GNUNET_free (va->transport_name);
3070 if (va->chvc != NULL)
3072 va->chvc->ve_count--;
3073 if (va->chvc->ve_count == 0)
3075 GNUNET_CONTAINER_DLL_remove (chvc_head,
3078 GNUNET_free (va->chvc);
3088 * HELLO validation cleanup task (validation failed).
3090 * @param cls the 'struct ValidationEntry' that failed
3091 * @param tc scheduler context (unused)
3094 timeout_hello_validation (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3096 struct ValidationEntry *va = cls;
3097 struct GNUNET_PeerIdentity pid;
3099 va->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3100 GNUNET_STATISTICS_update (stats,
3101 gettext_noop ("# address validation timeouts"),
3104 GNUNET_CRYPTO_hash (&va->publicKey,
3106 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
3108 GNUNET_break (GNUNET_OK ==
3109 GNUNET_CONTAINER_multihashmap_remove (validation_map,
3112 abort_validation (NULL, NULL, va);
3117 neighbour_timeout_task (void *cls,
3118 const struct GNUNET_SCHEDULER_TaskContext *tc)
3120 struct NeighbourList *n = cls;
3123 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
3124 "Neighbour `%4s' has timed out!\n", GNUNET_i2s (&n->id));
3126 GNUNET_STATISTICS_update (stats,
3127 gettext_noop ("# disconnects due to timeout"),
3130 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3131 disconnect_neighbour (n, GNUNET_NO);
3136 * Schedule the job that will cause us to send a PING to the
3137 * foreign address to evaluate its validity and latency.
3139 * @param fal address to PING
3142 schedule_next_ping (struct ForeignAddressList *fal);
3146 * Add the given address to the list of foreign addresses
3147 * available for the given peer (check for duplicates).
3149 * @param cls the respective 'struct NeighbourList' to update
3150 * @param tname name of the transport
3151 * @param expiration expiration time
3152 * @param addr the address
3153 * @param addrlen length of the address
3154 * @return GNUNET_OK (always)
3157 add_to_foreign_address_list (void *cls,
3159 struct GNUNET_TIME_Absolute expiration,
3163 struct NeighbourList *n = cls;
3164 struct ForeignAddressList *fal;
3167 GNUNET_STATISTICS_update (stats,
3168 gettext_noop ("# valid peer addresses returned by PEERINFO"),
3172 fal = find_peer_address (n, tname, NULL, addr, addrlen);
3175 #if DEBUG_TRANSPORT_HELLO
3176 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3177 "Adding address `%s' (%s) for peer `%4s' due to PEERINFO data for %llums.\n",
3178 a2s (tname, addr, addrlen),
3180 GNUNET_i2s (&n->id),
3181 expiration.abs_value);
3183 fal = add_peer_address (n, tname, NULL, addr, addrlen);
3186 GNUNET_STATISTICS_update (stats,
3187 gettext_noop ("# previously validated addresses lacking transport"),
3193 fal->expires = GNUNET_TIME_absolute_max (expiration,
3195 schedule_next_ping (fal);
3201 fal->expires = GNUNET_TIME_absolute_max (expiration,
3207 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3208 "Failed to add new address for `%4s'\n",
3209 GNUNET_i2s (&n->id));
3213 if (fal->validated == GNUNET_NO)
3215 fal->validated = GNUNET_YES;
3216 GNUNET_STATISTICS_update (stats,
3217 gettext_noop ("# peer addresses considered valid"),
3221 if (try == GNUNET_YES)
3224 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3225 "Have new addresses, will try to trigger transmissions.\n");
3227 try_transmission_to_peer (n);
3234 * Add addresses in validated HELLO "h" to the set of addresses
3235 * we have for this peer.
3237 * @param cls closure ('struct NeighbourList*')
3238 * @param peer id of the peer, NULL for last call
3239 * @param h hello message for the peer (can be NULL)
3240 * @param err_msg NULL if successful, otherwise contains error message
3243 add_hello_for_peer (void *cls,
3244 const struct GNUNET_PeerIdentity *peer,
3245 const struct GNUNET_HELLO_Message *h,
3246 const char *err_msg)
3248 struct NeighbourList *n = cls;
3250 if (err_msg != NULL)
3253 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3254 _("Error in communication with PEERINFO service: %s\n"),
3261 GNUNET_STATISTICS_update (stats,
3262 gettext_noop ("# outstanding peerinfo iterate requests"),
3269 return; /* no HELLO available */
3271 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3272 "Peerinfo had `%s' message for peer `%4s', adding existing addresses.\n",
3276 if (GNUNET_YES != n->public_key_valid)
3278 GNUNET_HELLO_get_key (h, &n->publicKey);
3279 n->public_key_valid = GNUNET_YES;
3281 GNUNET_HELLO_iterate_addresses (h,
3283 &add_to_foreign_address_list,
3289 * Create a fresh entry in our neighbour list for the given peer.
3290 * Will try to transmit our current HELLO to the new neighbour.
3291 * Do not call this function directly, use 'setup_peer_check_blacklist.
3293 * @param peer the peer for which we create the entry
3294 * @param do_hello should we schedule transmitting a HELLO
3295 * @return the new neighbour list entry
3297 static struct NeighbourList *
3298 setup_new_neighbour (const struct GNUNET_PeerIdentity *peer,
3301 struct NeighbourList *n;
3302 struct TransportPlugin *tp;
3303 struct ReadyList *rl;
3306 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3307 "Setting up state for neighbour `%4s'\n",
3310 GNUNET_assert (our_hello != NULL);
3311 GNUNET_STATISTICS_update (stats,
3312 gettext_noop ("# active neighbours"),
3315 n = GNUNET_malloc (sizeof (struct NeighbourList));
3316 n->next = neighbours;
3320 GNUNET_TIME_relative_to_absolute
3321 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
3322 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
3323 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
3324 MAX_BANDWIDTH_CARRY_S);
3328 if ((tp->api->send != NULL) && (!is_blacklisted(peer, tp)))
3330 rl = GNUNET_malloc (sizeof (struct ReadyList));
3332 rl->next = n->plugins;
3335 rl->addresses = NULL;
3339 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
3341 n->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
3342 &neighbour_timeout_task, n);
3345 GNUNET_STATISTICS_update (stats,
3346 gettext_noop ("# peerinfo new neighbor iterate requests"),
3349 GNUNET_STATISTICS_update (stats,
3350 gettext_noop ("# outstanding peerinfo iterate requests"),
3353 n->piter = GNUNET_PEERINFO_iterate (peerinfo, peer,
3354 GNUNET_TIME_UNIT_FOREVER_REL,
3355 &add_hello_for_peer, n);
3357 GNUNET_STATISTICS_update (stats,
3358 gettext_noop ("# HELLO's sent to new neighbors"),
3361 transmit_to_peer (NULL, NULL, 0,
3362 HELLO_ADDRESS_EXPIRATION,
3363 (const char *) our_hello, GNUNET_HELLO_size(our_hello),
3371 * Function called after we have checked if communicating
3372 * with a given peer is acceptable.
3374 * @param cls closure
3375 * @param n NULL if communication is not acceptable
3377 typedef void (*SetupContinuation)(void *cls,
3378 struct NeighbourList *n);
3382 * Information kept for each client registered to perform
3388 * This is a linked list.
3390 struct Blacklisters *next;
3393 * This is a linked list.
3395 struct Blacklisters *prev;
3398 * Client responsible for this entry.
3400 struct GNUNET_SERVER_Client *client;
3403 * Blacklist check that we're currently performing.
3405 struct BlacklistCheck *bc;
3411 * Head of DLL of blacklisting clients.
3413 static struct Blacklisters *bl_head;
3416 * Tail of DLL of blacklisting clients.
3418 static struct Blacklisters *bl_tail;
3422 * Context we use when performing a blacklist check.
3424 struct BlacklistCheck
3428 * This is a linked list.
3430 struct BlacklistCheck *next;
3433 * This is a linked list.
3435 struct BlacklistCheck *prev;
3438 * Peer being checked.
3440 struct GNUNET_PeerIdentity peer;
3443 * Option for setup neighbour afterwards.
3448 * Continuation to call with the result.
3450 SetupContinuation cont;
3458 * Current transmission request handle for this client, or NULL if no
3459 * request is pending.
3461 struct GNUNET_CONNECTION_TransmitHandle *th;
3464 * Our current position in the blacklisters list.
3466 struct Blacklisters *bl_pos;
3469 * Current task performing the check.
3471 GNUNET_SCHEDULER_TaskIdentifier task;
3476 * Head of DLL of active blacklisting queries.
3478 static struct BlacklistCheck *bc_head;
3481 * Tail of DLL of active blacklisting queries.
3483 static struct BlacklistCheck *bc_tail;
3487 * Perform next action in the blacklist check.
3489 * @param cls the 'struct BlacklistCheck*'
3493 do_blacklist_check (void *cls,
3494 const struct GNUNET_SCHEDULER_TaskContext *tc);
3497 * Transmit blacklist query to the client.
3499 * @param cls the 'struct BlacklistCheck'
3500 * @param size number of bytes allowed
3501 * @param buf where to copy the message
3502 * @return number of bytes copied to buf
3505 transmit_blacklist_message (void *cls,
3509 struct BlacklistCheck *bc = cls;
3510 struct Blacklisters *bl;
3511 struct BlacklistMessage bm;
3516 GNUNET_assert (bc->task == GNUNET_SCHEDULER_NO_TASK);
3517 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3519 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3520 "Failed to send blacklist test for peer `%s' to client\n",
3521 GNUNET_i2s (&bc->peer));
3525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3526 "Sending blacklist test for peer `%s' to client\n",
3527 GNUNET_i2s (&bc->peer));
3530 bm.header.size = htons (sizeof (struct BlacklistMessage));
3531 bm.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_QUERY);
3532 bm.is_allowed = htonl (0);
3534 memcpy (buf, &bm, sizeof (bm));
3535 GNUNET_SERVER_receive_done (bl->client, GNUNET_OK);
3541 * Perform next action in the blacklist check.
3543 * @param cls the 'struct BlacklistCheck*'
3547 do_blacklist_check (void *cls,
3548 const struct GNUNET_SCHEDULER_TaskContext *tc)
3550 struct BlacklistCheck *bc = cls;
3551 struct Blacklisters *bl;
3553 bc->task = GNUNET_SCHEDULER_NO_TASK;
3558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3559 "No blacklist clients active, will now setup neighbour record for peer `%s'\n",
3560 GNUNET_i2s (&bc->peer));
3562 bc->cont (bc->cont_cls,
3563 setup_new_neighbour (&bc->peer, bc->do_hello));
3570 bc->th = GNUNET_SERVER_notify_transmit_ready (bl->client,
3571 sizeof (struct BlacklistMessage),
3572 GNUNET_TIME_UNIT_FOREVER_REL,
3573 &transmit_blacklist_message,
3580 * Obtain a 'struct NeighbourList' for the given peer. If such an entry
3581 * does not yet exist, check the blacklist. If the blacklist says creating
3582 * one is acceptable, create one and call the continuation; otherwise
3583 * call the continuation with NULL.
3585 * @param peer peer to setup or look up a struct NeighbourList for
3586 * @param do_hello should we also schedule sending our HELLO to the peer
3587 * if this is a new record
3588 * @param cont function to call with the 'struct NeigbhbourList*'
3589 * @param cont_cls closure for cont
3592 setup_peer_check_blacklist (const struct GNUNET_PeerIdentity *peer,
3594 SetupContinuation cont,
3597 struct NeighbourList *n;
3598 struct BlacklistCheck *bc;
3600 n = find_neighbour(peer);
3604 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3605 "Neighbour record exists for peer `%s'\n",
3612 if (bl_head == NULL)
3615 cont (cont_cls, setup_new_neighbour (peer, do_hello));
3617 setup_new_neighbour(peer, do_hello);
3620 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3621 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3623 bc->do_hello = do_hello;
3625 bc->cont_cls = cont_cls;
3626 bc->bl_pos = bl_head;
3627 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3633 * Function called with the result of querying a new blacklister about
3634 * it being allowed (or not) to continue to talk to an existing neighbour.
3636 * @param cls the original 'struct NeighbourList'
3637 * @param n NULL if we need to disconnect
3640 confirm_or_drop_neighbour (void *cls,
3641 struct NeighbourList *n)
3643 struct NeighbourList * orig = cls;
3648 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3649 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&orig->id),
3650 "confirm_or_drop_neighboUr");
3652 disconnect_neighbour (orig, GNUNET_NO);
3658 * Handle a request to start a blacklist.
3660 * @param cls closure (always NULL)
3661 * @param client identification of the client
3662 * @param message the actual message
3665 handle_blacklist_init (void *cls,
3666 struct GNUNET_SERVER_Client *client,
3667 const struct GNUNET_MessageHeader *message)
3669 struct Blacklisters *bl;
3670 struct BlacklistCheck *bc;
3671 struct NeighbourList *n;
3676 if (bl->client == client)
3679 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3684 bl = GNUNET_malloc (sizeof (struct Blacklisters));
3685 bl->client = client;
3686 GNUNET_SERVER_client_keep (client);
3687 GNUNET_CONTAINER_DLL_insert_after (bl_head, bl_tail, bl_tail, bl);
3688 /* confirm that all existing connections are OK! */
3692 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3693 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3695 bc->do_hello = GNUNET_NO;
3696 bc->cont = &confirm_or_drop_neighbour;
3699 if (n == neighbours) /* all would wait for the same client, no need to
3700 create more than just the first task right now */
3701 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3709 * Handle a request to blacklist a peer.
3711 * @param cls closure (always NULL)
3712 * @param client identification of the client
3713 * @param message the actual message
3716 handle_blacklist_reply (void *cls,
3717 struct GNUNET_SERVER_Client *client,
3718 const struct GNUNET_MessageHeader *message)
3720 const struct BlacklistMessage *msg = (const struct BlacklistMessage*) message;
3721 struct Blacklisters *bl;
3722 struct BlacklistCheck *bc;
3725 while ( (bl != NULL) &&
3726 (bl->client != client) )
3731 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3732 "Blacklist client disconnected\n");
3734 /* FIXME: other error handling here!? */
3735 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3740 if (ntohl (msg->is_allowed) == GNUNET_SYSERR)
3743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3744 "Blacklist check failed, peer not allowed\n");
3746 bc->cont (bc->cont_cls, NULL);
3747 GNUNET_CONTAINER_DLL_remove (bc_head, bc_tail, bc);
3753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3754 "Blacklist check succeeded, continuing with checks\n");
3756 bc->bl_pos = bc->bl_pos->next;
3757 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3760 /* check if any other bc's are waiting for this blacklister */
3764 if ( (bc->bl_pos == bl) &&
3765 (GNUNET_SCHEDULER_NO_TASK == bc->task) )
3766 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3774 * Send periodic PING messages to a given foreign address.
3776 * @param cls our 'struct PeriodicValidationContext*'
3777 * @param tc task context
3780 send_periodic_ping (void *cls,
3781 const struct GNUNET_SCHEDULER_TaskContext *tc)
3783 struct ForeignAddressList *peer_address = cls;
3784 struct TransportPlugin *tp;
3785 struct ValidationEntry *va;
3786 struct NeighbourList *neighbour;
3787 struct TransportPingMessage ping;
3788 struct CheckAddressExistsClosure caec;
3790 uint16_t hello_size;
3794 peer_address->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
3795 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3797 tp = peer_address->ready_list->plugin;
3798 neighbour = peer_address->ready_list->neighbour;
3799 if (GNUNET_YES != neighbour->public_key_valid)
3801 /* no public key yet, try again later */
3802 schedule_next_ping (peer_address);
3805 caec.addr = peer_address->addr;
3806 caec.addrlen = peer_address->addrlen;
3807 caec.tname = tp->short_name;
3808 caec.session = peer_address->session;
3809 caec.exists = GNUNET_NO;
3810 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
3811 &check_address_exists,
3813 if (caec.exists == GNUNET_YES)
3815 /* During validation attempts we will likely trigger the other
3816 peer trying to validate our address which in turn will cause
3817 it to send us its HELLO, so we expect to hit this case rather
3818 frequently. Only print something if we are very verbose. */
3819 #if DEBUG_TRANSPORT > 1
3820 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3821 "Some validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
3822 (peer_address->addr != NULL)
3823 ? a2s (tp->short_name,
3825 peer_address->addrlen)
3828 GNUNET_i2s (&neighbour->id));
3830 schedule_next_ping (peer_address);
3833 va = GNUNET_malloc (sizeof (struct ValidationEntry) + peer_address->addrlen);
3834 va->transport_name = GNUNET_strdup (tp->short_name);
3835 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
3837 va->send_time = GNUNET_TIME_absolute_get();
3838 va->session = peer_address->session;
3839 if (peer_address->addr != NULL)
3841 va->addr = (const void*) &va[1];
3842 memcpy (&va[1], peer_address->addr, peer_address->addrlen);
3843 va->addrlen = peer_address->addrlen;
3845 memcpy(&va->publicKey,
3846 &neighbour->publicKey,
3847 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
3849 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
3850 &timeout_hello_validation,
3852 GNUNET_CONTAINER_multihashmap_put (validation_map,
3853 &neighbour->id.hashPubKey,
3855 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3857 if (peer_address->validated != GNUNET_YES)
3858 hello_size = GNUNET_HELLO_size(our_hello);
3862 tsize = sizeof(struct TransportPingMessage) + hello_size;
3864 if (peer_address->addr != NULL)
3866 slen = strlen (tp->short_name) + 1;
3867 tsize += slen + peer_address->addrlen;
3871 slen = 0; /* make gcc happy */
3873 message_buf = GNUNET_malloc(tsize);
3874 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
3875 ping.challenge = htonl(va->challenge);
3876 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
3877 if (peer_address->validated != GNUNET_YES)
3879 memcpy(message_buf, our_hello, hello_size);
3882 if (peer_address->addr != NULL)
3884 ping.header.size = htons(sizeof(struct TransportPingMessage) +
3885 peer_address->addrlen +
3887 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
3890 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
3892 peer_address->addrlen);
3896 ping.header.size = htons(sizeof(struct TransportPingMessage));
3899 memcpy(&message_buf[hello_size],
3901 sizeof(struct TransportPingMessage));
3903 #if DEBUG_TRANSPORT_REVALIDATION
3904 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3905 "Performing re-validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s'\n",
3906 (peer_address->addr != NULL)
3907 ? a2s (peer_address->plugin->short_name,
3909 peer_address->addrlen)
3912 GNUNET_i2s (&neighbour->id),
3913 "HELLO", hello_size,
3916 if (peer_address->validated != GNUNET_YES)
3917 GNUNET_STATISTICS_update (stats,
3918 gettext_noop ("# PING with HELLO messages sent"),
3922 GNUNET_STATISTICS_update (stats,
3923 gettext_noop ("# PING without HELLO messages sent"),
3926 GNUNET_STATISTICS_update (stats,
3927 gettext_noop ("# PING messages sent for re-validation"),
3930 transmit_to_peer (NULL, peer_address,
3931 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
3932 HELLO_VERIFICATION_TIMEOUT,
3934 GNUNET_YES, neighbour);
3935 GNUNET_free(message_buf);
3936 schedule_next_ping (peer_address);
3941 * Schedule the job that will cause us to send a PING to the
3942 * foreign address to evaluate its validity and latency.
3944 * @param fal address to PING
3947 schedule_next_ping (struct ForeignAddressList *fal)
3949 struct GNUNET_TIME_Relative delay;
3951 if (fal->revalidate_task != GNUNET_SCHEDULER_NO_TASK)
3953 delay = GNUNET_TIME_absolute_get_remaining (fal->expires);
3954 delay.rel_value /= 2; /* do before expiration */
3955 delay = GNUNET_TIME_relative_min (delay,
3956 LATENCY_EVALUATION_MAX_DELAY);
3957 if (GNUNET_YES != fal->estimated)
3959 delay = GNUNET_TIME_UNIT_ZERO;
3960 fal->estimated = GNUNET_YES;
3962 if (GNUNET_YES == fal->connected)
3964 delay = GNUNET_TIME_relative_min (delay,
3965 CONNECTED_LATENCY_EVALUATION_MAX_DELAY);
3967 /* FIXME: also adjust delay based on how close the last
3968 observed latency is to the latency of the best alternative */
3969 /* bound how fast we can go */
3970 delay = GNUNET_TIME_relative_max (delay,
3971 GNUNET_TIME_UNIT_SECONDS);
3972 /* randomize a bit (to avoid doing all at the same time) */
3973 delay.rel_value += GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1000);
3974 fal->revalidate_task = GNUNET_SCHEDULER_add_delayed(delay,
3975 &send_periodic_ping,
3983 * Function that will be called if we receive some payload
3984 * from another peer.
3986 * @param message the payload
3987 * @param n peer who claimed to be the sender
3990 handle_payload_message (const struct GNUNET_MessageHeader *message,
3991 struct NeighbourList *n)
3993 struct InboundMessage *im;
3994 struct TransportClient *cpos;
3997 msize = ntohs (message->size);
3998 if (n->received_pong == GNUNET_NO)
4001 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4002 "Received message of type %u and size %u from `%4s', but no pong yet!!\n",
4003 ntohs (message->type),
4004 ntohs (message->size),
4005 GNUNET_i2s (&n->id));
4007 GNUNET_free_non_null (n->pre_connect_message_buffer);
4008 n->pre_connect_message_buffer = GNUNET_malloc (msize);
4009 memcpy (n->pre_connect_message_buffer, message, msize);
4014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4015 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
4016 ntohs (message->type),
4017 ntohs (message->size),
4018 GNUNET_i2s (&n->id));
4020 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
4023 n->quota_violation_count++;
4025 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4026 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
4027 n->in_tracker.available_bytes_per_s__,
4028 n->quota_violation_count);
4030 /* Discount 32k per violation */
4031 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
4036 if (n->quota_violation_count > 0)
4038 /* try to add 32k back */
4039 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
4041 n->quota_violation_count--;
4044 GNUNET_STATISTICS_update (stats,
4045 gettext_noop ("# payload received from other peers"),
4048 /* transmit message to all clients */
4049 uint32_t ats_count = 2;
4050 size_t size = sizeof (struct InboundMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information) + msize;
4051 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
4054 im = GNUNET_malloc (size);
4055 im->header.size = htons (size);
4056 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
4058 im->ats_count = htonl(ats_count);
4059 /* Setting ATS data */
4060 (&(im->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
4061 (&(im->ats))[0].value = htonl (n->distance);
4062 (&(im->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4063 (&(im->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
4064 (&(im->ats))[ats_count].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
4065 (&(im->ats))[ats_count].value = htonl (0);
4067 memcpy (&((&(im->ats))[ats_count+1]), message, msize);
4069 while (cpos != NULL)
4071 transmit_to_client (cpos, &im->header, GNUNET_YES);
4079 * Iterator over hash map entries. Checks if the given validation
4080 * entry is for the same challenge as what is given in the PONG.
4082 * @param cls the 'struct TransportPongMessage*'
4083 * @param key peer identity
4084 * @param value value in the hash map ('struct ValidationEntry')
4085 * @return GNUNET_YES if we should continue to
4086 * iterate (mismatch), GNUNET_NO if not (entry matched)
4089 check_pending_validation (void *cls,
4090 const GNUNET_HashCode * key,
4093 const struct TransportPongMessage *pong = cls;
4094 struct ValidationEntry *ve = value;
4095 struct AddValidatedAddressContext avac;
4096 unsigned int challenge = ntohl(pong->challenge);
4097 struct GNUNET_HELLO_Message *hello;
4098 struct GNUNET_PeerIdentity target;
4099 struct NeighbourList *n;
4100 struct ForeignAddressList *fal;
4101 struct OwnAddressList *oal;
4102 struct TransportPlugin *tp;
4103 struct GNUNET_MessageHeader *prem;
4109 ps = ntohs (pong->header.size);
4110 if (ps < sizeof (struct TransportPongMessage))
4112 GNUNET_break_op (0);
4115 addr = (const char*) &pong[1];
4116 slen = strlen (ve->transport_name) + 1;
4117 if ( (ps - sizeof (struct TransportPongMessage) < slen) ||
4118 (ve->challenge != challenge) ||
4119 (addr[slen-1] != '\0') ||
4120 (0 != strcmp (addr, ve->transport_name)) ||
4121 (ntohl (pong->purpose.size)
4122 != sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
4124 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
4125 sizeof (struct GNUNET_PeerIdentity) + ps - sizeof (struct TransportPongMessage)) )
4130 alen = ps - sizeof (struct TransportPongMessage) - slen;
4131 switch (ntohl (pong->purpose.purpose))
4133 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN:
4134 if ( (ve->addrlen + slen != ntohl (pong->addrlen)) ||
4135 (0 != memcmp (&addr[slen],
4139 return GNUNET_YES; /* different entry, keep trying! */
4141 if (0 != memcmp (&pong->pid,
4143 sizeof (struct GNUNET_PeerIdentity)))
4145 GNUNET_break_op (0);
4149 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN,
4154 GNUNET_break_op (0);
4159 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4160 "Confirmed validity of address, peer `%4s' has address `%s' (%s).\n",
4162 a2s (ve->transport_name,
4163 (const struct sockaddr *) ve->addr,
4165 ve->transport_name);
4168 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING:
4169 if (0 != memcmp (&pong->pid,
4171 sizeof (struct GNUNET_PeerIdentity)))
4174 GNUNET_asprintf(&peer, "%s",GNUNET_i2s (&pong->pid));
4176 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4177 "Received PONG for different identity: I am `%s', PONG identity: `%s'\n",
4178 GNUNET_i2s (&my_identity),
4184 if (ve->addrlen != 0)
4186 /* must have been for a different validation entry */
4189 tp = find_transport (ve->transport_name);
4195 oal = tp->addresses;
4198 if ( (oal->addrlen == alen) &&
4199 (0 == memcmp (&oal[1],
4207 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4208 _("Not accepting PONG with address `%s' since I cannot confirm having this address.\n"),
4209 a2s (ve->transport_name,
4215 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING,
4220 GNUNET_break_op (0);
4225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4226 "Confirmed that peer `%4s' is talking to us using address `%s' (%s) for us.\n",
4228 a2s (ve->transport_name,
4231 ve->transport_name);
4235 GNUNET_break_op (0);
4238 if (GNUNET_TIME_absolute_get_remaining (GNUNET_TIME_absolute_ntoh (pong->expiration)).rel_value == 0)
4240 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4241 _("Received expired signature. Check system time.\n"));
4244 GNUNET_STATISTICS_update (stats,
4245 gettext_noop ("# address validation successes"),
4248 /* create the updated HELLO */
4249 GNUNET_CRYPTO_hash (&ve->publicKey,
4250 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4251 &target.hashPubKey);
4252 if (ve->addr != NULL)
4254 avac.done = GNUNET_NO;
4256 hello = GNUNET_HELLO_create (&ve->publicKey,
4257 &add_validated_address,
4259 GNUNET_PEERINFO_add_peer (peerinfo,
4261 GNUNET_free (hello);
4263 n = find_neighbour (&target);
4266 n->publicKey = ve->publicKey;
4267 n->public_key_valid = GNUNET_YES;
4268 fal = add_peer_address (n,
4273 GNUNET_assert (fal != NULL);
4274 fal->expires = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
4275 fal->validated = GNUNET_YES;
4276 mark_address_connected (fal);
4277 GNUNET_STATISTICS_update (stats,
4278 gettext_noop ("# peer addresses considered valid"),
4281 fal->latency = GNUNET_TIME_absolute_get_duration (ve->send_time);
4282 update_addr_value (fal, GNUNET_TIME_absolute_get_duration (ve->send_time).rel_value, GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4284 schedule_next_ping (fal);
4285 if (n->latency.rel_value == GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
4286 n->latency = fal->latency;
4288 n->latency.rel_value = (fal->latency.rel_value + n->latency.rel_value) / 2;
4290 n->distance = fal->distance;
4291 if (GNUNET_NO == n->received_pong)
4293 n->received_pong = GNUNET_YES;
4295 notify_clients_connect (&target, n->latency, n->distance);
4296 if (NULL != (prem = n->pre_connect_message_buffer))
4298 n->pre_connect_message_buffer = NULL;
4299 handle_payload_message (prem, n);
4303 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4305 GNUNET_SCHEDULER_cancel (n->retry_task);
4306 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4307 try_transmission_to_peer (n);
4311 /* clean up validation entry */
4312 GNUNET_assert (GNUNET_YES ==
4313 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4316 abort_validation (NULL, NULL, ve);
4322 * Function that will be called if we receive a validation
4323 * of an address challenge that we transmitted to another
4324 * peer. Note that the validation should only be considered
4325 * acceptable if the challenge matches AND if the sender
4326 * address is at least a plausible address for this peer
4327 * (otherwise we may be seeing a MiM attack).
4329 * @param cls closure
4330 * @param message the pong message
4331 * @param peer who responded to our challenge
4332 * @param sender_address string describing our sender address (as observed
4333 * by the other peer in binary format)
4334 * @param sender_address_len number of bytes in 'sender_address'
4337 handle_pong (void *cls, const struct GNUNET_MessageHeader *message,
4338 const struct GNUNET_PeerIdentity *peer,
4339 const char *sender_address,
4340 size_t sender_address_len)
4342 #if DEBUG_TRANSPORT > 1
4343 /* we get tons of these that just get discarded, only log
4344 if we are quite verbose */
4345 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4346 "Receiving `%s' message from `%4s'.\n", "PONG",
4349 GNUNET_STATISTICS_update (stats,
4350 gettext_noop ("# PONG messages received"),
4353 if (GNUNET_SYSERR !=
4354 GNUNET_CONTAINER_multihashmap_get_multiple (validation_map,
4356 &check_pending_validation,
4359 /* This is *expected* to happen a lot since we send
4360 PONGs to *all* known addresses of the sender of
4361 the PING, so most likely we get multiple PONGs
4362 per PING, and all but the first PONG will end up
4363 here. So really we should not print anything here
4364 unless we want to be very, very verbose... */
4365 #if DEBUG_TRANSPORT > 2
4366 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4367 "Received `%s' message from `%4s' but have no record of a matching `%s' message. Ignoring.\n",
4379 * Try to validate a neighbour's address by sending him our HELLO and a PING.
4381 * @param cls the 'struct ValidationEntry*'
4382 * @param neighbour neighbour to validate, NULL if validation failed
4385 transmit_hello_and_ping (void *cls,
4386 struct NeighbourList *neighbour)
4388 struct ValidationEntry *va = cls;
4389 struct ForeignAddressList *peer_address;
4390 struct TransportPingMessage ping;
4391 uint16_t hello_size;
4394 struct GNUNET_PeerIdentity id;
4397 GNUNET_CRYPTO_hash (&va->publicKey,
4398 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4400 if (neighbour == NULL)
4402 /* FIXME: stats... */
4403 GNUNET_break (GNUNET_OK ==
4404 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4407 abort_validation (NULL, NULL, va);
4410 neighbour->publicKey = va->publicKey;
4411 neighbour->public_key_valid = GNUNET_YES;
4412 peer_address = add_peer_address (neighbour,
4413 va->transport_name, NULL,
4414 (const void*) &va[1],
4416 if (peer_address == NULL)
4418 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4419 "Failed to add peer `%4s' for plugin `%s'\n",
4420 GNUNET_i2s (&neighbour->id),
4421 va->transport_name);
4422 GNUNET_break (GNUNET_OK ==
4423 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4426 abort_validation (NULL, NULL, va);
4429 hello_size = GNUNET_HELLO_size(our_hello);
4430 slen = strlen(va->transport_name) + 1;
4431 tsize = sizeof(struct TransportPingMessage) + hello_size + va->addrlen + slen;
4432 message_buf = GNUNET_malloc(tsize);
4433 ping.challenge = htonl(va->challenge);
4434 ping.header.size = htons(sizeof(struct TransportPingMessage) + slen + va->addrlen);
4435 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
4436 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
4437 memcpy(message_buf, our_hello, hello_size);
4438 memcpy(&message_buf[hello_size],
4440 sizeof(struct TransportPingMessage));
4441 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
4444 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
4448 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4449 "Performing validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s' (%u bytes)\n",
4452 : a2s (va->transport_name,
4453 (const void*) &va[1], va->addrlen),
4455 GNUNET_i2s (&neighbour->id),
4456 "HELLO", hello_size,
4457 "PING", sizeof (struct TransportPingMessage) + va->addrlen + slen);
4460 GNUNET_STATISTICS_update (stats,
4461 gettext_noop ("# PING messages sent for initial validation"),
4464 transmit_to_peer (NULL, peer_address,
4465 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
4466 HELLO_VERIFICATION_TIMEOUT,
4468 GNUNET_YES, neighbour);
4469 GNUNET_free(message_buf);
4474 * Check if the given address is already being validated; if not,
4475 * append the given address to the list of entries that are being be
4476 * validated and initiate validation.
4478 * @param cls closure ('struct CheckHelloValidatedContext *')
4479 * @param tname name of the transport
4480 * @param expiration expiration time
4481 * @param addr the address
4482 * @param addrlen length of the address
4483 * @return GNUNET_OK (always)
4486 run_validation (void *cls,
4488 struct GNUNET_TIME_Absolute expiration,
4492 struct CheckHelloValidatedContext *chvc = cls;
4493 struct GNUNET_PeerIdentity id;
4494 struct TransportPlugin *tp;
4495 struct ValidationEntry *va;
4496 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4497 struct CheckAddressExistsClosure caec;
4498 struct OwnAddressList *oal;
4500 GNUNET_assert (addr != NULL);
4502 GNUNET_STATISTICS_update (stats,
4503 gettext_noop ("# peer addresses scheduled for validation"),
4506 tp = find_transport (tname);
4509 GNUNET_log (GNUNET_ERROR_TYPE_INFO |
4510 GNUNET_ERROR_TYPE_BULK,
4512 ("Transport `%s' not loaded, will not try to validate peer address using this transport.\n"),
4514 GNUNET_STATISTICS_update (stats,
4515 gettext_noop ("# peer addresses not validated (plugin not available)"),
4520 /* check if this is one of our own addresses */
4521 oal = tp->addresses;
4524 if ( (oal->addrlen == addrlen) &&
4525 (0 == memcmp (&oal[1],
4529 /* not plausible, this address is equivalent to our own address! */
4530 GNUNET_STATISTICS_update (stats,
4531 gettext_noop ("# peer addresses not validated (loopback)"),
4538 GNUNET_HELLO_get_key (chvc->hello, &pk);
4539 GNUNET_CRYPTO_hash (&pk,
4541 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4544 if (is_blacklisted(&id, tp))
4547 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4548 "Attempted to validate blacklisted peer `%s' using `%s'!\n",
4556 caec.addrlen = addrlen;
4557 caec.session = NULL;
4559 caec.exists = GNUNET_NO;
4560 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
4561 &check_address_exists,
4563 if (caec.exists == GNUNET_YES)
4565 /* During validation attempts we will likely trigger the other
4566 peer trying to validate our address which in turn will cause
4567 it to send us its HELLO, so we expect to hit this case rather
4568 frequently. Only print something if we are very verbose. */
4569 #if DEBUG_TRANSPORT > 1
4570 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4571 "Validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
4572 a2s (tname, addr, addrlen),
4576 GNUNET_STATISTICS_update (stats,
4577 gettext_noop ("# peer addresses not validated (in progress)"),
4582 va = GNUNET_malloc (sizeof (struct ValidationEntry) + addrlen);
4585 va->transport_name = GNUNET_strdup (tname);
4586 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
4588 va->send_time = GNUNET_TIME_absolute_get();
4589 va->addr = (const void*) &va[1];
4590 memcpy (&va[1], addr, addrlen);
4591 va->addrlen = addrlen;
4592 GNUNET_HELLO_get_key (chvc->hello,
4594 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
4595 &timeout_hello_validation,
4597 GNUNET_CONTAINER_multihashmap_put (validation_map,
4600 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4601 setup_peer_check_blacklist (&id, GNUNET_NO,
4602 &transmit_hello_and_ping,
4609 * Check if addresses in validated hello "h" overlap with
4610 * those in "chvc->hello" and validate the rest.
4612 * @param cls closure
4613 * @param peer id of the peer, NULL for last call
4614 * @param h hello message for the peer (can be NULL)
4615 * @param err_msg NULL if successful, otherwise contains error message
4618 check_hello_validated (void *cls,
4619 const struct GNUNET_PeerIdentity *peer,
4620 const struct GNUNET_HELLO_Message *h,
4621 const char *err_msg)
4623 struct CheckHelloValidatedContext *chvc = cls;
4624 struct GNUNET_HELLO_Message *plain_hello;
4625 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4626 struct GNUNET_PeerIdentity target;
4627 struct NeighbourList *n;
4629 if (err_msg != NULL)
4632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4633 _("Error in communication with PEERINFO service: %s\n"),
4641 GNUNET_STATISTICS_update (stats,
4642 gettext_noop ("# outstanding peerinfo iterate requests"),
4646 if (GNUNET_NO == chvc->hello_known)
4648 /* notify PEERINFO about the peer now, so that we at least
4649 have the public key if some other component needs it */
4650 GNUNET_HELLO_get_key (chvc->hello, &pk);
4651 GNUNET_CRYPTO_hash (&pk,
4652 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4653 &target.hashPubKey);
4654 plain_hello = GNUNET_HELLO_create (&pk,
4657 GNUNET_PEERINFO_add_peer (peerinfo, plain_hello);
4658 GNUNET_free (plain_hello);
4659 #if DEBUG_TRANSPORT_HELLO
4660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4661 "PEERINFO had no `%s' message for peer `%4s', full validation needed.\n",
4663 GNUNET_i2s (&target));
4665 GNUNET_STATISTICS_update (stats,
4666 gettext_noop ("# new HELLOs requiring full validation"),
4669 GNUNET_HELLO_iterate_addresses (chvc->hello,
4676 GNUNET_STATISTICS_update (stats,
4677 gettext_noop ("# duplicate HELLO (peer known)"),
4682 if (chvc->ve_count == 0)
4684 GNUNET_CONTAINER_DLL_remove (chvc_head,
4693 #if DEBUG_TRANSPORT_HELLO
4694 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4695 "PEERINFO had `%s' message for peer `%4s', validating only new addresses.\n",
4699 chvc->hello_known = GNUNET_YES;
4700 n = find_neighbour (peer);
4703 #if DEBUG_TRANSPORT_HELLO
4704 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4705 "Calling hello_iterate_addresses for %s!\n",
4708 GNUNET_HELLO_iterate_addresses (h,
4710 &add_to_foreign_address_list,
4712 try_transmission_to_peer (n);
4716 #if DEBUG_TRANSPORT_HELLO
4717 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4718 "No existing neighbor record for %s!\n",
4721 GNUNET_STATISTICS_update (stats,
4722 gettext_noop ("# no existing neighbour record (validating HELLO)"),
4726 GNUNET_STATISTICS_update (stats,
4727 gettext_noop ("# HELLO validations (update case)"),
4730 GNUNET_HELLO_iterate_new_addresses (chvc->hello,
4732 GNUNET_TIME_relative_to_absolute (HELLO_REVALIDATION_START_TIME),
4739 * Process HELLO-message.
4741 * @param plugin transport involved, may be NULL
4742 * @param message the actual message
4743 * @return GNUNET_OK if the HELLO was well-formed, GNUNET_SYSERR otherwise
4746 process_hello (struct TransportPlugin *plugin,
4747 const struct GNUNET_MessageHeader *message)
4750 struct GNUNET_PeerIdentity target;
4751 const struct GNUNET_HELLO_Message *hello;
4752 struct CheckHelloValidatedContext *chvc;
4753 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
4754 #if DEBUG_TRANSPORT_HELLO > 2
4757 hsize = ntohs (message->size);
4758 if ((ntohs (message->type) != GNUNET_MESSAGE_TYPE_HELLO) ||
4759 (hsize < sizeof (struct GNUNET_MessageHeader)))
4762 return GNUNET_SYSERR;
4764 GNUNET_STATISTICS_update (stats,
4765 gettext_noop ("# HELLOs received for validation"),
4769 /* first, check if load is too high */
4770 if (GNUNET_SCHEDULER_get_load (GNUNET_SCHEDULER_PRIORITY_BACKGROUND) > MAX_HELLO_LOAD)
4772 GNUNET_STATISTICS_update (stats,
4773 gettext_noop ("# HELLOs ignored due to high load"),
4776 #if DEBUG_TRANSPORT_HELLO
4777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4778 "Ignoring `%s' for `%4s', load too high.\n",
4780 GNUNET_i2s (&target));
4784 hello = (const struct GNUNET_HELLO_Message *) message;
4785 if (GNUNET_OK != GNUNET_HELLO_get_key (hello, &publicKey))
4787 #if DEBUG_TRANSPORT_HELLO
4788 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4789 "Unable to get public key from `%s' for `%4s'!\n",
4791 GNUNET_i2s (&target));
4793 GNUNET_break_op (0);
4794 return GNUNET_SYSERR;
4797 GNUNET_CRYPTO_hash (&publicKey,
4798 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4799 &target.hashPubKey);
4801 #if DEBUG_TRANSPORT_HELLO
4802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4803 "Received `%s' message for `%4s'\n",
4805 GNUNET_i2s (&target));
4808 if (0 == memcmp (&my_identity,
4810 sizeof (struct GNUNET_PeerIdentity)))
4812 GNUNET_STATISTICS_update (stats,
4813 gettext_noop ("# HELLOs ignored for validation (is my own HELLO)"),
4819 while (NULL != chvc)
4821 if (GNUNET_HELLO_equals (hello,
4823 GNUNET_TIME_absolute_get ()).abs_value > 0)
4825 #if DEBUG_TRANSPORT_HELLO > 2
4826 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4827 "Received duplicate `%s' message for `%4s'; ignored\n",
4829 GNUNET_i2s (&target));
4831 return GNUNET_OK; /* validation already pending */
4833 if (GNUNET_HELLO_size(hello) == GNUNET_HELLO_size (chvc->hello))
4834 GNUNET_break (0 != memcmp (hello, chvc->hello,
4835 GNUNET_HELLO_size(hello)));
4840 struct NeighbourList *temp_neighbor = find_neighbour(&target);
4841 if ((NULL != temp_neighbor))
4843 fprintf(stderr, "Already know peer, ignoring hello\n");
4848 #if DEBUG_TRANSPORT_HELLO > 2
4851 my_id = GNUNET_strdup(GNUNET_i2s(plugin->env.my_identity));
4853 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4854 "%s: Starting validation of `%s' message for `%4s' via '%s' of size %u\n",
4857 GNUNET_i2s (&target),
4859 GNUNET_HELLO_size(hello));
4864 chvc = GNUNET_malloc (sizeof (struct CheckHelloValidatedContext) + hsize);
4866 chvc->hello = (const struct GNUNET_HELLO_Message *) &chvc[1];
4867 memcpy (&chvc[1], hello, hsize);
4868 GNUNET_CONTAINER_DLL_insert (chvc_head,
4871 /* finally, check if HELLO was previously validated
4872 (continuation will then schedule actual validation) */
4873 GNUNET_STATISTICS_update (stats,
4874 gettext_noop ("# peerinfo process hello iterate requests"),
4877 GNUNET_STATISTICS_update (stats,
4878 gettext_noop ("# outstanding peerinfo iterate requests"),
4881 chvc->piter = GNUNET_PEERINFO_iterate (peerinfo,
4883 HELLO_VERIFICATION_TIMEOUT,
4884 &check_hello_validated, chvc);
4890 * The peer specified by the given neighbour has timed-out or a plugin
4891 * has disconnected. We may either need to do nothing (other plugins
4892 * still up), or trigger a full disconnect and clean up. This
4893 * function updates our state and does the necessary notifications.
4894 * Also notifies our clients that the neighbour is now officially
4897 * @param n the neighbour list entry for the peer
4898 * @param check GNUNET_YES to check if ALL addresses for this peer
4899 * are gone, GNUNET_NO to force a disconnect of the peer
4900 * regardless of whether other addresses exist.
4903 disconnect_neighbour (struct NeighbourList *n, int check)
4905 struct ReadyList *rpos;
4906 struct NeighbourList *npos;
4907 struct NeighbourList *nprev;
4908 struct MessageQueue *mq;
4909 struct ForeignAddressList *peer_addresses;
4910 struct ForeignAddressList *peer_pos;
4912 if (GNUNET_YES == check)
4915 while (NULL != rpos)
4917 peer_addresses = rpos->addresses;
4918 while (peer_addresses != NULL)
4920 if (GNUNET_YES == peer_addresses->connected)
4923 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4924 "NOT Disconnecting from `%4s', still have live addresses!\n",
4925 GNUNET_i2s (&n->id));
4927 return; /* still connected */
4929 peer_addresses = peer_addresses->next;
4935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4936 "Disconnecting from `%4s'\n",
4937 GNUNET_i2s (&n->id));
4939 /* remove n from neighbours list */
4942 while ((npos != NULL) && (npos != n))
4947 GNUNET_assert (npos != NULL);
4949 neighbours = n->next;
4951 nprev->next = n->next;
4953 /* notify all clients about disconnect */
4954 if (GNUNET_YES == n->received_pong)
4955 notify_clients_disconnect (&n->id);
4957 /* clean up all plugins, cancel connections and pending transmissions */
4958 while (NULL != (rpos = n->plugins))
4960 n->plugins = rpos->next;
4961 rpos->plugin->api->disconnect (rpos->plugin->api->cls, &n->id);
4962 while (rpos->addresses != NULL)
4964 peer_pos = rpos->addresses;
4965 rpos->addresses = peer_pos->next;
4966 if (peer_pos->connected == GNUNET_YES)
4967 GNUNET_STATISTICS_update (stats,
4968 gettext_noop ("# connected addresses"),
4971 if (GNUNET_YES == peer_pos->validated)
4972 GNUNET_STATISTICS_update (stats,
4973 gettext_noop ("# peer addresses considered valid"),
4976 if (GNUNET_SCHEDULER_NO_TASK != peer_pos->revalidate_task)
4978 GNUNET_SCHEDULER_cancel (peer_pos->revalidate_task);
4979 peer_pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
4981 GNUNET_free(peer_pos->ressources);
4982 peer_pos->ressources = NULL;
4983 GNUNET_free(peer_pos->quality);
4984 peer_pos->ressources = NULL;
4985 GNUNET_free(peer_pos);
4986 ats->stat.recreate_problem = GNUNET_YES;
4991 /* free all messages on the queue */
4992 while (NULL != (mq = n->messages_head))
4994 GNUNET_STATISTICS_update (stats,
4995 gettext_noop ("# bytes in message queue for other peers"),
4996 - (int64_t) mq->message_buf_size,
4998 GNUNET_STATISTICS_update (stats,
4999 gettext_noop ("# bytes discarded due to disconnect"),
5000 mq->message_buf_size,
5002 GNUNET_CONTAINER_DLL_remove (n->messages_head,
5005 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
5007 sizeof(struct GNUNET_PeerIdentity)));
5010 if (n->timeout_task != GNUNET_SCHEDULER_NO_TASK)
5012 GNUNET_SCHEDULER_cancel (n->timeout_task);
5013 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
5015 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
5017 GNUNET_SCHEDULER_cancel (n->retry_task);
5018 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
5020 if (n->piter != NULL)
5022 GNUNET_PEERINFO_iterate_cancel (n->piter);
5023 GNUNET_STATISTICS_update (stats,
5024 gettext_noop ("# outstanding peerinfo iterate requests"),
5029 /* finally, free n itself */
5030 GNUNET_STATISTICS_update (stats,
5031 gettext_noop ("# active neighbours"),
5034 GNUNET_free_non_null (n->pre_connect_message_buffer);
5040 * We have received a PING message from someone. Need to send a PONG message
5041 * in response to the peer by any means necessary.
5044 handle_ping(void *cls, const struct GNUNET_MessageHeader *message,
5045 const struct GNUNET_PeerIdentity *peer,
5046 struct Session *session,
5047 const char *sender_address,
5048 uint16_t sender_address_len)
5050 struct TransportPlugin *plugin = cls;
5051 struct SessionHeader *session_header = (struct SessionHeader*) session;
5052 struct TransportPingMessage *ping;
5053 struct TransportPongMessage *pong;
5054 struct NeighbourList *n;
5055 struct ReadyList *rl;
5056 struct ForeignAddressList *fal;
5057 struct OwnAddressList *oal;
5062 if (ntohs (message->size) < sizeof (struct TransportPingMessage))
5064 GNUNET_break_op (0);
5065 return GNUNET_SYSERR;
5068 ping = (struct TransportPingMessage *) message;
5069 if (0 != memcmp (&ping->target,
5070 plugin->env.my_identity,
5071 sizeof (struct GNUNET_PeerIdentity)))
5074 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5075 _("Received `%s' message from `%s' destined for `%s' which is not me!\n"),
5077 (sender_address != NULL)
5078 ? a2s (plugin->short_name,
5079 (const struct sockaddr *)sender_address,
5082 GNUNET_i2s (&ping->target));
5084 return GNUNET_SYSERR;
5087 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
5088 "Processing `%s' from `%s'\n",
5090 (sender_address != NULL)
5091 ? a2s (plugin->short_name,
5092 (const struct sockaddr *)sender_address,
5096 GNUNET_STATISTICS_update (stats,
5097 gettext_noop ("# PING messages received"),
5100 addr = (const char*) &ping[1];
5101 alen = ntohs (message->size) - sizeof (struct TransportPingMessage);
5102 slen = strlen (plugin->short_name) + 1;
5105 /* peer wants to confirm that we have an outbound connection to him */
5106 if (session == NULL)
5108 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5109 _("Refusing to create PONG since I do not have a session with `%s'.\n"),
5111 return GNUNET_SYSERR;
5113 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5114 pong->header.size = htons (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5115 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5116 pong->purpose.size =
5117 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5119 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5120 sizeof (struct GNUNET_PeerIdentity) + sender_address_len + slen);
5121 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING);
5122 pong->challenge = ping->challenge;
5123 pong->addrlen = htonl(sender_address_len + slen);
5126 sizeof(struct GNUNET_PeerIdentity));
5130 if ((sender_address!=NULL) && (sender_address_len > 0))
5131 memcpy (&((char*)&pong[1])[slen],
5133 sender_address_len);
5134 if (GNUNET_TIME_absolute_get_remaining (session_header->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4)
5136 /* create / update cached sig */
5138 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5139 "Creating PONG signature to indicate active connection.\n");
5141 session_header->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5142 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5143 GNUNET_assert (GNUNET_OK ==
5144 GNUNET_CRYPTO_rsa_sign (my_private_key,
5146 &session_header->pong_signature));
5150 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5152 memcpy (&pong->signature,
5153 &session_header->pong_signature,
5154 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5160 /* peer wants to confirm that this is one of our addresses */
5164 plugin->api->check_address (plugin->api->cls,
5168 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5169 _("Not confirming PING with address `%s' since I cannot confirm having this address.\n"),
5170 a2s (plugin->short_name,
5175 oal = plugin->addresses;
5178 if ( (oal->addrlen == alen) &&
5185 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + alen + slen);
5186 pong->header.size = htons (sizeof (struct TransportPongMessage) + alen + slen);
5187 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5188 pong->purpose.size =
5189 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5191 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5192 sizeof (struct GNUNET_PeerIdentity) + alen + slen);
5193 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN);
5194 pong->challenge = ping->challenge;
5195 pong->addrlen = htonl(alen + slen);
5198 sizeof(struct GNUNET_PeerIdentity));
5199 memcpy (&pong[1], plugin->short_name, slen);
5200 memcpy (&((char*)&pong[1])[slen], addr, alen);
5201 if ( (oal != NULL) &&
5202 (GNUNET_TIME_absolute_get_remaining (oal->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4) )
5204 /* create / update cached sig */
5206 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5207 "Creating PONG signature to indicate ownership.\n");
5209 oal->pong_sig_expires = GNUNET_TIME_absolute_min (oal->expires,
5210 GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5211 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5212 GNUNET_assert (GNUNET_OK ==
5213 GNUNET_CRYPTO_rsa_sign (my_private_key,
5215 &oal->pong_signature));
5216 memcpy (&pong->signature,
5217 &oal->pong_signature,
5218 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5220 else if (oal == NULL)
5222 /* not using cache (typically DV-only) */
5223 pong->expiration = GNUNET_TIME_absolute_hton (GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5224 GNUNET_assert (GNUNET_OK ==
5225 GNUNET_CRYPTO_rsa_sign (my_private_key,
5231 /* can used cached version */
5232 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5233 memcpy (&pong->signature,
5234 &oal->pong_signature,
5235 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5238 n = find_neighbour(peer);
5239 GNUNET_assert (n != NULL);
5240 /* first try reliable response transmission */
5244 fal = rl->addresses;
5247 if (-1 != rl->plugin->api->send (rl->plugin->api->cls,
5250 ntohs (pong->header.size),
5251 TRANSPORT_PONG_PRIORITY,
5252 HELLO_VERIFICATION_TIMEOUT,
5260 GNUNET_STATISTICS_update (stats,
5261 gettext_noop ("# PONGs unicast via reliable transport"),
5271 /* no reliable method found, do multicast */
5272 GNUNET_STATISTICS_update (stats,
5273 gettext_noop ("# PONGs multicast to all available addresses"),
5279 fal = rl->addresses;
5282 transmit_to_peer(NULL, fal,
5283 TRANSPORT_PONG_PRIORITY,
5284 HELLO_VERIFICATION_TIMEOUT,
5286 ntohs(pong->header.size),
5302 * Function called by the plugin for each received message.
5303 * Update data volumes, possibly notify plugins about
5304 * reducing the rate at which they read from the socket
5305 * and generally forward to our receive callback.
5307 * @param cls the "struct TransportPlugin *" we gave to the plugin
5308 * @param peer (claimed) identity of the other peer
5309 * @param message the message, NULL if we only care about
5310 * learning about the delay until we should receive again
5311 * @param ats_data information for automatic transport selection
5312 * @param ats_count number of elements in ats not including 0-terminator
5313 * @param session identifier used for this session (can be NULL)
5314 * @param sender_address binary address of the sender (if observed)
5315 * @param sender_address_len number of bytes in sender_address
5316 * @return how long in ms the plugin should wait until receiving more data
5317 * (plugins that do not support this, can ignore the return value)
5319 static struct GNUNET_TIME_Relative
5320 plugin_env_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
5321 const struct GNUNET_MessageHeader *message,
5322 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
5324 struct Session *session,
5325 const char *sender_address,
5326 uint16_t sender_address_len)
5328 struct TransportPlugin *plugin = cls;
5329 struct ReadyList *service_context;
5330 struct ForeignAddressList *peer_address;
5332 struct NeighbourList *n;
5333 struct GNUNET_TIME_Relative ret;
5334 if (is_blacklisted (peer, plugin))
5335 return GNUNET_TIME_UNIT_FOREVER_REL;
5339 n = find_neighbour (peer);
5341 n = setup_new_neighbour (peer, GNUNET_YES);
5342 service_context = n->plugins;
5343 while ((service_context != NULL) && (plugin != service_context->plugin))
5344 service_context = service_context->next;
5345 GNUNET_assert ((plugin->api->send == NULL) || (service_context != NULL));
5346 peer_address = NULL;
5349 for (c=0; c<ats_count; c++)
5351 if (ntohl(ats_data[c].type) == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
5353 distance = ntohl(ats_data[c].value);
5357 /* notify ATS about incoming data */
5358 //ats_notify_ats_data(peer, ats_data);
5361 if (message != NULL)
5363 if ( (session != NULL) ||
5364 (sender_address != NULL) )
5365 peer_address = add_peer_address (n,
5369 sender_address_len);
5370 if (peer_address != NULL)
5373 update_addr_ats(peer_address, ats_data, ats_count);
5374 update_addr_value(peer_address, distance, GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5376 peer_address->distance = distance;
5377 if (GNUNET_YES == peer_address->validated)
5378 mark_address_connected (peer_address);
5379 peer_address->timeout
5381 GNUNET_TIME_relative_to_absolute
5382 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5383 schedule_next_ping (peer_address);
5385 /* update traffic received amount ... */
5386 msize = ntohs (message->size);
5388 GNUNET_STATISTICS_update (stats,
5389 gettext_noop ("# bytes received from other peers"),
5392 n->distance = distance;
5394 GNUNET_TIME_relative_to_absolute
5395 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5396 GNUNET_SCHEDULER_cancel (n->timeout_task);
5398 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
5399 &neighbour_timeout_task, n);
5400 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
5402 /* dropping message due to frequent inbound volume violations! */
5403 GNUNET_log (GNUNET_ERROR_TYPE_WARNING |
5404 GNUNET_ERROR_TYPE_BULK,
5406 ("Dropping incoming message due to repeated bandwidth quota (%u b/s) violations (total of %u).\n"),
5407 n->in_tracker.available_bytes_per_s__,
5408 n->quota_violation_count);
5409 GNUNET_STATISTICS_update (stats,
5410 gettext_noop ("# bandwidth quota violations by other peers"),
5413 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
5415 if ((ntohs(message->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_ATS) &&
5416 (ntohs(message->size) == (sizeof (struct GNUNET_MessageHeader) + sizeof (uint32_t))))
5418 uint32_t value = ntohl(*((uint32_t *) &message[1]));
5419 //GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "GNUNET_MESSAGE_TYPE_TRANSPORT_ATS: %i \n", value);
5420 /* Force ressource and quality update */
5423 ats->stat.modified_resources = GNUNET_YES;
5424 ats->stat.modified_quality = GNUNET_YES;
5426 /* Force cost update */
5428 ats->stat.modified_resources = GNUNET_YES;
5429 /* Force quality update */
5431 ats->stat.modified_quality = GNUNET_YES;
5432 /* Force full rebuild */
5434 ats->stat.recreate_problem = GNUNET_YES;
5438 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5439 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
5440 ntohs (message->type),
5441 ntohs (message->size),
5444 switch (ntohs (message->type))
5446 case GNUNET_MESSAGE_TYPE_HELLO:
5447 GNUNET_STATISTICS_update (stats,
5448 gettext_noop ("# HELLO messages received from other peers"),
5451 process_hello (plugin, message);
5453 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
5454 handle_ping (plugin, message, peer, session, sender_address, sender_address_len);
5456 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
5457 handle_pong (plugin, message, peer, sender_address, sender_address_len);
5459 case GNUNET_MESSAGE_TYPE_TRANSPORT_ATS:
5462 handle_payload_message (message, n);
5466 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 0);
5467 if (ret.rel_value > 0)
5470 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5471 "Throttling read (%llu bytes excess at %u b/s), waiting %llums before reading more.\n",
5472 (unsigned long long) n->in_tracker.consumption_since_last_update__,
5473 (unsigned int) n->in_tracker.available_bytes_per_s__,
5474 (unsigned long long) ret.rel_value);
5476 GNUNET_STATISTICS_update (stats,
5477 gettext_noop ("# ms throttling suggested"),
5478 (int64_t) ret.rel_value,
5485 * Handle START-message. This is the first message sent to us
5486 * by any client which causes us to add it to our list.
5488 * @param cls closure (always NULL)
5489 * @param client identification of the client
5490 * @param message the actual message
5493 handle_start (void *cls,
5494 struct GNUNET_SERVER_Client *client,
5495 const struct GNUNET_MessageHeader *message)
5497 const struct StartMessage *start;
5498 struct TransportClient *c;
5499 struct ConnectInfoMessage * cim;
5500 struct NeighbourList *n;
5504 start = (const struct StartMessage*) message;
5506 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5507 "Received `%s' request from client\n", "START");
5512 if (c->client == client)
5514 /* client already on our list! */
5516 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5521 if ( (GNUNET_NO != ntohl (start->do_check)) &&
5522 (0 != memcmp (&start->self,
5524 sizeof (struct GNUNET_PeerIdentity))) )
5526 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5527 _("Rejecting control connection from peer `%s', which is not me!\n"),
5528 GNUNET_i2s (&start->self));
5529 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5532 c = GNUNET_malloc (sizeof (struct TransportClient));
5536 if (our_hello != NULL)
5539 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5540 "Sending our own `%s' to new client\n", "HELLO");
5542 transmit_to_client (c,
5543 (const struct GNUNET_MessageHeader *) our_hello,
5545 /* tell new client about all existing connections */
5547 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
5548 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
5552 cim = GNUNET_malloc (size);
5553 cim->header.size = htons (size);
5554 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
5555 cim->ats_count = htonl(ats_count);
5556 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
5557 (&(cim->ats))[2].value = htonl (0);
5561 if (GNUNET_YES == n->received_pong)
5563 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5564 (&(cim->ats))[0].value = htonl (n->distance);
5565 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
5566 (&(cim->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
5568 transmit_to_client (c, &cim->header, GNUNET_NO);
5574 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5579 * Handle HELLO-message.
5581 * @param cls closure (always NULL)
5582 * @param client identification of the client
5583 * @param message the actual message
5586 handle_hello (void *cls,
5587 struct GNUNET_SERVER_Client *client,
5588 const struct GNUNET_MessageHeader *message)
5592 GNUNET_STATISTICS_update (stats,
5593 gettext_noop ("# HELLOs received from clients"),
5596 ret = process_hello (NULL, message);
5597 GNUNET_SERVER_receive_done (client, ret);
5602 * Closure for 'transmit_client_message'; followed by
5603 * 'msize' bytes of the actual message.
5605 struct TransmitClientMessageContext
5608 * Client on whom's behalf we are sending.
5610 struct GNUNET_SERVER_Client *client;
5613 * Timeout for the transmission.
5615 struct GNUNET_TIME_Absolute timeout;
5623 * Size of the message in bytes.
5630 * Schedule transmission of a message we got from a client to a peer.
5632 * @param cls the 'struct TransmitClientMessageContext*'
5633 * @param n destination, or NULL on error (in that case, drop the message)
5636 transmit_client_message (void *cls,
5637 struct NeighbourList *n)
5639 struct TransmitClientMessageContext *tcmc = cls;
5640 struct TransportClient *tc;
5643 while ((tc != NULL) && (tc->client != tcmc->client))
5648 transmit_to_peer (tc, NULL, tcmc->priority,
5649 GNUNET_TIME_absolute_get_remaining (tcmc->timeout),
5651 tcmc->msize, GNUNET_NO, n);
5653 GNUNET_SERVER_receive_done (tcmc->client, GNUNET_OK);
5654 GNUNET_SERVER_client_drop (tcmc->client);
5660 * Handle SEND-message.
5662 * @param cls closure (always NULL)
5663 * @param client identification of the client
5664 * @param message the actual message
5667 handle_send (void *cls,
5668 struct GNUNET_SERVER_Client *client,
5669 const struct GNUNET_MessageHeader *message)
5671 const struct OutboundMessage *obm;
5672 const struct GNUNET_MessageHeader *obmm;
5673 struct TransmitClientMessageContext *tcmc;
5677 size = ntohs (message->size);
5679 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
5682 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5685 GNUNET_STATISTICS_update (stats,
5686 gettext_noop ("# payload received for other peers"),
5689 obm = (const struct OutboundMessage *) message;
5690 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
5691 msize = size - sizeof (struct OutboundMessage);
5693 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5694 "Received `%s' request from client with target `%4s' and message of type %u and size %u\n",
5695 "SEND", GNUNET_i2s (&obm->peer),
5699 tcmc = GNUNET_malloc (sizeof (struct TransmitClientMessageContext) + msize);
5700 tcmc->client = client;
5701 tcmc->priority = ntohl (obm->priority);
5702 tcmc->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_ntoh (obm->timeout));
5703 tcmc->msize = msize;
5704 /* FIXME: this memcpy can be up to 7% of our total runtime */
5705 memcpy (&tcmc[1], obmm, msize);
5706 GNUNET_SERVER_client_keep (client);
5707 setup_peer_check_blacklist (&obm->peer, GNUNET_YES,
5708 &transmit_client_message,
5714 * Handle request connect message
5716 * @param cls closure (always NULL)
5717 * @param client identification of the client
5718 * @param message the actual message
5721 handle_request_connect (void *cls,
5722 struct GNUNET_SERVER_Client *client,
5723 const struct GNUNET_MessageHeader *message)
5725 const struct TransportRequestConnectMessage *trcm =
5726 (const struct TransportRequestConnectMessage *) message;
5728 GNUNET_STATISTICS_update (stats,
5729 gettext_noop ("# REQUEST CONNECT messages received"),
5733 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
5734 "Received a request connect message for peer `%s'\n",
5735 GNUNET_i2s(&trcm->peer));
5737 setup_peer_check_blacklist (&trcm->peer, GNUNET_YES,
5739 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5744 * Handle SET_QUOTA-message.
5746 * @param cls closure (always NULL)
5747 * @param client identification of the client
5748 * @param message the actual message
5751 handle_set_quota (void *cls,
5752 struct GNUNET_SERVER_Client *client,
5753 const struct GNUNET_MessageHeader *message)
5755 const struct QuotaSetMessage *qsm =
5756 (const struct QuotaSetMessage *) message;
5757 struct NeighbourList *n;
5759 GNUNET_STATISTICS_update (stats,
5760 gettext_noop ("# SET QUOTA messages received"),
5763 n = find_neighbour (&qsm->peer);
5766 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5767 GNUNET_STATISTICS_update (stats,
5768 gettext_noop ("# SET QUOTA messages ignored (no such peer)"),
5774 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5775 "Received `%s' request (new quota %u, old quota %u) from client for peer `%4s'\n",
5777 (unsigned int) ntohl (qsm->quota.value__),
5778 (unsigned int) n->in_tracker.available_bytes_per_s__,
5779 GNUNET_i2s (&qsm->peer));
5781 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker,
5783 if (0 == ntohl (qsm->quota.value__))
5786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5787 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&n->id),
5790 disconnect_neighbour (n, GNUNET_NO);
5792 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5797 * Take the given address and append it to the set of results sent back to
5800 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
5801 * @param address the resolved name, NULL to indicate the last response
5804 transmit_address_to_client (void *cls, const char *address)
5806 struct GNUNET_SERVER_TransmitContext *tc = cls;
5809 if (NULL == address)
5812 slen = strlen (address) + 1;
5814 GNUNET_SERVER_transmit_context_append_data (tc, address, slen,
5815 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5816 if (NULL == address)
5817 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
5822 * Handle AddressLookup-message.
5824 * @param cls closure (always NULL)
5825 * @param client identification of the client
5826 * @param message the actual message
5829 handle_address_lookup (void *cls,
5830 struct GNUNET_SERVER_Client *client,
5831 const struct GNUNET_MessageHeader *message)
5833 const struct AddressLookupMessage *alum;
5834 struct TransportPlugin *lsPlugin;
5835 const char *nameTransport;
5836 const char *address;
5838 struct GNUNET_SERVER_TransmitContext *tc;
5839 struct GNUNET_TIME_Absolute timeout;
5840 struct GNUNET_TIME_Relative rtimeout;
5843 size = ntohs (message->size);
5844 if (size < sizeof (struct AddressLookupMessage))
5846 GNUNET_break_op (0);
5847 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5850 alum = (const struct AddressLookupMessage *) message;
5851 uint32_t addressLen = ntohl (alum->addrlen);
5852 if (size <= sizeof (struct AddressLookupMessage) + addressLen)
5854 GNUNET_break_op (0);
5855 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5858 address = (const char *) &alum[1];
5859 nameTransport = (const char *) &address[addressLen];
5861 [size - sizeof (struct AddressLookupMessage) - addressLen - 1] != '\0')
5863 GNUNET_break_op (0);
5864 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5867 timeout = GNUNET_TIME_absolute_ntoh (alum->timeout);
5868 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5869 numeric = ntohl (alum->numeric_only);
5870 lsPlugin = find_transport (nameTransport);
5871 if (NULL == lsPlugin)
5873 tc = GNUNET_SERVER_transmit_context_create (client);
5874 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5875 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5876 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
5879 tc = GNUNET_SERVER_transmit_context_create (client);
5880 lsPlugin->api->address_pretty_printer (lsPlugin->api->cls,
5882 address, addressLen,
5885 &transmit_address_to_client, tc);
5890 * Setup the environment for this plugin.
5893 create_environment (struct TransportPlugin *plug)
5895 plug->env.cfg = cfg;
5896 plug->env.my_identity = &my_identity;
5897 plug->env.our_hello = &our_hello;
5898 plug->env.cls = plug;
5899 plug->env.receive = &plugin_env_receive;
5900 plug->env.notify_address = &plugin_env_notify_address;
5901 plug->env.session_end = &plugin_env_session_end;
5902 plug->env.max_connections = max_connect_per_transport;
5903 plug->env.stats = stats;
5908 * Start the specified transport (load the plugin).
5911 start_transport (struct GNUNET_SERVER_Handle *server,
5914 struct TransportPlugin *plug;
5917 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5918 _("Loading `%s' transport plugin\n"), name);
5919 GNUNET_asprintf (&libname, "libgnunet_plugin_transport_%s", name);
5920 plug = GNUNET_malloc (sizeof (struct TransportPlugin));
5921 create_environment (plug);
5922 plug->short_name = GNUNET_strdup (name);
5923 plug->lib_name = libname;
5924 plug->next = plugins;
5926 plug->api = GNUNET_PLUGIN_load (libname, &plug->env);
5927 if (plug->api == NULL)
5929 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5930 _("Failed to load transport plugin for `%s'\n"), name);
5931 GNUNET_free (plug->short_name);
5932 plugins = plug->next;
5933 GNUNET_free (libname);
5940 * Called whenever a client is disconnected. Frees our
5941 * resources associated with that client.
5943 * @param cls closure
5944 * @param client identification of the client
5947 client_disconnect_notification (void *cls,
5948 struct GNUNET_SERVER_Client *client)
5950 struct TransportClient *pos;
5951 struct TransportClient *prev;
5952 struct ClientMessageQueueEntry *mqe;
5953 struct Blacklisters *bl;
5954 struct BlacklistCheck *bc;
5959 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
5960 "Client disconnected, cleaning up.\n");
5962 /* clean up blacklister */
5966 if (bl->client == client)
5971 if (bc->bl_pos == bl)
5973 bc->bl_pos = bl->next;
5976 GNUNET_CONNECTION_notify_transmit_ready_cancel (bc->th);
5979 if (bc->task == GNUNET_SCHEDULER_NO_TASK)
5980 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
5986 GNUNET_CONTAINER_DLL_remove (bl_head,
5989 GNUNET_SERVER_client_drop (bl->client);
5995 /* clean up 'normal' clients */
5998 while ((pos != NULL) && (pos->client != client))
6005 while (NULL != (mqe = pos->message_queue_head))
6007 GNUNET_CONTAINER_DLL_remove (pos->message_queue_head,
6008 pos->message_queue_tail,
6010 pos->message_count--;
6014 clients = pos->next;
6016 prev->next = pos->next;
6017 if (GNUNET_YES == pos->tcs_pending)
6022 if (pos->th != NULL)
6024 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
6027 GNUNET_break (0 == pos->message_count);
6033 * Function called when the service shuts down. Unloads our plugins
6034 * and cancels pending validations.
6036 * @param cls closure, unused
6037 * @param tc task context (unused)
6040 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6042 struct TransportPlugin *plug;
6043 struct OwnAddressList *al;
6044 struct CheckHelloValidatedContext *chvc;
6046 while (neighbours != NULL)
6049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6050 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&neighbours->id),
6053 disconnect_neighbour (neighbours, GNUNET_NO);
6056 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6057 "Transport service is unloading plugins...\n");
6059 while (NULL != (plug = plugins))
6061 plugins = plug->next;
6062 if (plug->address_update_task != GNUNET_SCHEDULER_NO_TASK)
6064 GNUNET_SCHEDULER_cancel (plug->address_update_task);
6065 plug->address_update_task = GNUNET_SCHEDULER_NO_TASK;
6067 GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
6068 GNUNET_free (plug->lib_name);
6069 GNUNET_free (plug->short_name);
6070 while (NULL != (al = plug->addresses))
6072 plug->addresses = al->next;
6077 if (my_private_key != NULL)
6078 GNUNET_CRYPTO_rsa_key_free (my_private_key);
6079 GNUNET_free_non_null (our_hello);
6081 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
6084 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6085 validation_map = NULL;
6089 /* free 'chvc' data structure */
6090 while (NULL != (chvc = chvc_head))
6092 chvc_head = chvc->next;
6093 if (chvc->piter != NULL)
6095 GNUNET_PEERINFO_iterate_cancel (chvc->piter);
6096 GNUNET_STATISTICS_update (stats,
6097 gettext_noop ("# outstanding peerinfo iterate requests"),
6104 GNUNET_assert (chvc->ve_count == 0);
6111 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6114 if (peerinfo != NULL)
6116 GNUNET_PEERINFO_disconnect (peerinfo);
6119 /* Can we assume those are gone by now, or do we need to clean up
6121 GNUNET_break (bl_head == NULL);
6122 GNUNET_break (bc_head == NULL);
6126 static int ats_evaluate_results (int result, int solution, char * problem)
6128 int cont = GNUNET_NO;
6129 int error_kind = GNUNET_ERROR_TYPE_DEBUG;
6131 error_kind = GNUNET_ERROR_TYPE_ERROR;
6135 case GLP_ESTOP : /* search terminated by application */
6136 GNUNET_log (error_kind, "%s , Search terminated by application\n", problem);
6138 case GLP_EITLIM : /* iteration limit exceeded */
6139 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Iteration limit exceeded\n", problem);
6142 case GLP_ETMLIM : /* time limit exceeded */
6143 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Time limit exceeded\n", problem);
6145 case GLP_ENOPFS : /* no primal feasible solution */
6146 case GLP_ENODFS : /* no dual feasible solution */
6147 GNUNET_log (error_kind, "%s No feasible solution\n", problem);
6150 case GLP_EBADB : /* invalid basis */
6151 case GLP_ESING : /* singular matrix */
6152 case GLP_ECOND : /* ill-conditioned matrix */
6153 case GLP_EBOUND : /* invalid bounds */
6154 case GLP_EFAIL : /* solver failed */
6155 case GLP_EOBJLL : /* objective lower limit reached */
6156 case GLP_EOBJUL : /* objective upper limit reached */
6157 case GLP_EROOT : /* root LP optimum not provided */
6158 GNUNET_log (error_kind, "%s Invalid Input data: %i\n", problem, result);
6162 GNUNET_log (error_kind, "%s Problem has been solved\n", problem);
6168 GNUNET_log (error_kind, "%s solution is undefined\n", problem);
6171 GNUNET_log (error_kind, "%s solution is optimal\n", problem);
6175 GNUNET_log (error_kind, "%s solution is %s feasible, however, its optimality (or non-optimality) has not been proven, \n", problem, (0==strcmp(problem,"LP")?"":"integer"));
6179 GNUNET_log (error_kind, "%s problem has no %sfeasible solution\n", problem, (0==strcmp(problem,"LP")?"":"integer "));
6182 GNUNET_log (error_kind, "%s problem is infeasible \n", problem);
6185 GNUNET_log (error_kind, "%s problem is unbounded \n", problem);
6192 static void ats_solve_problem (unsigned int max_it, unsigned int max_dur, unsigned int c_peers, unsigned int c_mechs, struct ATS_stat *stat)
6201 glp_init_smcp(&opt_lp);
6203 opt_lp.msg_lev = GLP_MSG_ALL;
6205 opt_lp.msg_lev = GLP_MSG_OFF;
6208 // setting iteration limit
6209 opt_lp.it_lim = max_it;
6211 opt_lp.tm_lim = max_dur;
6213 if (ats->stat.recreate_problem == GNUNET_YES)
6214 opt_lp.presolve = GLP_ON;
6215 result = glp_simplex(ats->prob, &opt_lp);
6216 lp_solution = glp_get_status (ats->prob);
6218 if ((result == GLP_ETMLIM) || (result == GLP_ETMLIM))
6220 ats->stat.valid = GNUNET_NO;
6221 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ATS exceeded time or iteration limit!\n");
6225 if (ats_evaluate_results(result, lp_solution, "LP") == GNUNET_YES)
6227 stat->valid = GNUNET_YES;
6231 ats->stat.simplex_rerun_required = GNUNET_YES;
6232 opt_lp.presolve = GLP_ON;
6233 result = glp_simplex(ats->prob, &opt_lp);
6234 lp_solution = glp_get_status (ats->prob);
6236 // TODO: Remove if this does not appear until release
6237 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "EXECUTED SIMPLEX WITH PRESOLVER! %i \n", lp_solution);
6239 if (ats_evaluate_results(result, lp_solution, "LP") != GNUNET_YES)
6241 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "After execution simplex with presolver: STILL INVALID!\n");
6243 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i_%llu.mlp",ats->stat.c_peers, ats->stat.c_mechs, GNUNET_TIME_absolute_get().abs_value);
6244 glp_write_lp (ats->prob, NULL, filename);
6245 GNUNET_free (filename);
6246 stat->valid = GNUNET_NO;
6247 ats->stat.recreate_problem = GNUNET_YES;
6250 stat->valid = GNUNET_YES;
6255 glp_init_iocp(&opt_mlp);
6257 opt_mlp.tm_lim = max_dur;
6260 opt_mlp.msg_lev = GLP_MSG_ALL;
6262 opt_mlp.msg_lev = GLP_MSG_OFF;
6265 result = glp_intopt (ats->prob, &opt_mlp);
6266 mlp_solution = glp_mip_status (ats->prob);
6267 stat->solution = mlp_solution;
6269 if (ats_evaluate_results(result, mlp_solution, "MLP") == GNUNET_YES)
6271 stat->valid = GNUNET_YES;
6275 // TODO: Remove if this does not appear until release
6276 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "MLP SOLUTION INVALID: %i\n", lp_solution);
6277 stat->valid = GNUNET_NO;
6282 int error = GNUNET_NO;
6284 struct ATS_mechanism *t = NULL;
6285 for (c=1; c<= (c_peers); c++ )
6288 t = peers[c].m_head;
6291 bw = glp_get_col_prim(prob, t->col_index);
6295 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[%i][%i] `%s' %s %s %f\n", c, t->col_index, GNUNET_h2s(&peers[c].peer.hashPubKey), t->plugin->short_name, glp_get_col_name(prob,t->col_index), bw);
6297 if (check ==GNUNET_YES)
6299 glp_write_sol(prob, "invalid_solution.mlp");
6300 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid solution, check invalid_solution.mlp");
6301 GNUNET_STATISTICS_update (stats, "ATS invalid solutions", 1, GNUNET_NO);
6304 if (check ==GNUNET_NO)
6312 if (glp_get_col_prim(ats->prob,2*c_mechs+1) != 1)
6315 for (c=1; c<= available_quality_metrics; c++ )
6317 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s %f\n", glp_get_col_name(ats->prob,2*c_mechs+3+c), glp_get_col_prim(ats->prob,2*c_mechs+3+c));
6319 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s %f\n", glp_get_col_name(ats->prob,2*c_mechs+1), glp_get_col_prim(ats->prob,2*c_mechs+1));
6320 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s %f\n", glp_get_col_name(ats->prob,2*c_mechs+2), glp_get_col_prim(ats->prob,2*c_mechs+2));
6321 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "%s %f\n", glp_get_col_name(ats->prob,2*c_mechs+3), glp_get_col_prim(ats->prob,2*c_mechs+3));
6322 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "objective value: %f\n", glp_mip_obj_val(ats->prob));
6327 static void ats_delete_problem ()
6330 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Deleting problem\n");
6334 for (c=0; c< (ats->stat).c_mechs; c++)
6335 GNUNET_free_non_null (ats->mechanisms[c].rc);
6338 if (ats->mechanisms!=NULL)
6340 GNUNET_free(ats->mechanisms);
6341 ats->mechanisms = NULL;
6344 if (ats->peers!=NULL)
6346 GNUNET_free(ats->peers);
6350 if (ats->prob != NULL)
6352 glp_delete_prob(ats->prob);
6356 ats->stat.begin_cr = GNUNET_SYSERR;
6357 ats->stat.begin_qm = GNUNET_SYSERR;
6358 ats->stat.c_mechs = 0;
6359 ats->stat.c_peers = 0;
6360 ats->stat.end_cr = GNUNET_SYSERR;
6361 ats->stat.end_qm = GNUNET_SYSERR;
6362 ats->stat.solution = GNUNET_SYSERR;
6363 ats->stat.valid = GNUNET_SYSERR;
6367 static void ats_update_problem_qm ()
6372 int c_q_metrics = available_quality_metrics;
6374 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6375 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6377 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6379 row_index = ats->stat.begin_qm;
6381 for (c=1; c <= c_q_metrics; c++)
6386 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6389 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6390 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6392 ja[array_index] = c2;
6394 GNUNET_assert (ats->mechanisms[c2].addr != NULL);
6395 GNUNET_assert (ats->mechanisms[c2].peer != NULL);
6397 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
6399 double v0 = 0, v1 = 0, v2 = 0;
6401 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6402 if (v1 < 1) v0 = 0.1;
6403 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6404 if (v1 < 1) v0 = 0.1;
6405 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6406 if (v1 < 1) v0 = 0.1;
6407 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
6410 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
6412 double v0 = 0, v1 = 0, v2 = 0;
6413 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6415 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6417 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6419 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
6421 value = (double) 10 / value;
6425 ar[array_index] = (ats->mechanisms[c2].peer->f) * value;
6427 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: %s [%i,%i]=%f \n",array_index, qm[c-1].name, row_index, ja[array_index], ar[array_index]);
6431 ja[array_index] = ats->stat.col_qm + c - 1;
6432 ar[array_index] = -1;
6435 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6437 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6443 GNUNET_free_non_null (ja);
6444 GNUNET_free_non_null (ar);
6448 static void ats_update_problem_cr ()
6454 double ct_max, ct_min;
6456 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6457 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6459 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6460 row_index = ats->stat.begin_cr;
6462 for (c=0; c<available_ressources; c++)
6464 ct_max = ressources[c].c_max;
6465 ct_min = ressources[c].c_min;
6467 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
6469 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
6471 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6475 GNUNET_assert (ats->mechanisms[c2].addr != NULL);
6476 GNUNET_assert (ats->mechanisms[c2].peer != NULL);
6478 ja[array_index] = c2;
6479 value = ats->mechanisms[c2].addr->ressources[c].c;
6480 ar[array_index] = value;
6482 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6486 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6492 GNUNET_free_non_null (ja);
6493 GNUNET_free_non_null (ar);
6498 static void ats_update_problem_qm_TEST ()
6503 int old_ja[ats->stat.c_mechs + 2];
6504 double old_ar[ats->stat.c_mechs + 2];
6508 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6509 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6511 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics TEST\n");
6513 if (ats->stat.begin_qm >0)
6514 row_index = ats->stat.begin_qm;
6519 for (c=0; c<available_quality_metrics; c++)
6522 c_old = glp_get_mat_row (ats->prob, row_index, old_ja, old_ar);
6524 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6526 for (c2=1; c2<=c_old; c2++)
6528 ja[c2] = old_ja[c2];
6529 if ((changed < 3) && (c2>2) && (old_ar[c2] != -1))
6531 ar[c2] = old_ar[c2] + 5 - changed;
6535 ar[c2] = old_ar[c2];
6537 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: old [%i,%i]=%f new [%i,%i]=%f\n",c2, row_index, old_ja[c2], old_ar[c2], row_index, ja[c2], ar[c2]);
6540 glp_set_mat_row (ats->prob, row_index, c_old, ja, ar);
6545 GNUNET_free_non_null (ja);
6546 GNUNET_free_non_null (ar);
6548 #endif //END: HAVE_LIBGLPK
6550 /** solve the bandwidth distribution problem
6551 * @param max_it maximum iterations
6552 * @param max_dur maximum duration in ms
6553 * @param D weight for diversity
6554 * @param U weight for utility
6555 * @param R weight for relativity
6556 * @param v_b_min minimal bandwidth per peer
6557 * @param v_n_min minimum number of connections
6558 * @param stat result struct
6559 * @return GNUNET_SYSERR if glpk is not available, number of mechanisms used
6561 static int ats_create_problem (double D, double U, double R, int v_b_min, int v_n_min, struct ATS_stat *stat)
6563 ats->prob = glp_create_prob();
6569 int c_c_ressources = available_ressources;
6570 int c_q_metrics = available_quality_metrics;
6572 double M = VERY_BIG_DOUBLE_VALUE;
6573 double Q[c_q_metrics+1];
6574 for (c=1; c<=c_q_metrics; c++)
6579 struct NeighbourList *next = neighbours;
6582 int found_addresses = GNUNET_NO;
6583 struct ReadyList *r_next = next->plugins;
6584 while (r_next != NULL)
6586 struct ForeignAddressList * a_next = r_next->addresses;
6587 while (a_next != NULL)
6590 found_addresses = GNUNET_YES;
6591 a_next = a_next->next;
6593 r_next = r_next->next;
6595 if (found_addresses) c_peers++;
6602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No addresses for bw distribution available\n", c_peers);
6604 stat->valid = GNUNET_NO;
6607 return GNUNET_SYSERR;
6610 ats->mechanisms = GNUNET_malloc((1+c_mechs) * sizeof (struct ATS_mechanism));
6611 ats->peers = GNUNET_malloc((1+c_peers) * sizeof (struct ATS_peer));
6613 struct ATS_mechanism * mechanisms = ats->mechanisms;
6614 struct ATS_peer * peers = ats->peers;
6622 int found_addresses = GNUNET_NO;
6623 struct ReadyList *r_next = next->plugins;
6624 while (r_next != NULL)
6626 struct ForeignAddressList * a_next = r_next->addresses;
6627 while (a_next != NULL)
6629 if (found_addresses == GNUNET_NO)
6631 peers[c_peers].peer = next->id;
6632 peers[c_peers].m_head = NULL;
6633 peers[c_peers].m_tail = NULL;
6634 peers[c_peers].f = 1.0 / c_mechs;
6637 mechanisms[c_mechs].addr = a_next;
6638 mechanisms[c_mechs].col_index = c_mechs;
6639 mechanisms[c_mechs].peer = &peers[c_peers];
6640 mechanisms[c_mechs].next = NULL;
6641 mechanisms[c_mechs].plugin = r_next->plugin;
6643 GNUNET_CONTAINER_DLL_insert_tail(peers[c_peers].m_head, peers[c_peers].m_tail, &mechanisms[c_mechs]);
6644 found_addresses = GNUNET_YES;
6647 a_next = a_next->next;
6649 r_next = r_next->next;
6651 if (found_addresses == GNUNET_YES)
6658 if (v_n_min > c_peers)
6662 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Creating problem with: %i peers, %i mechanisms, %i resource entries, %i quality metrics \n", c_peers, c_mechs, c_c_ressources, c_q_metrics);
6665 int size = 1 + 3 + 10 *c_mechs + c_peers + (c_q_metrics*c_mechs)+ c_q_metrics + c_c_ressources * c_mechs ;
6668 int * ia = GNUNET_malloc (size * sizeof (int));
6669 int * ja = GNUNET_malloc (size * sizeof (int));
6670 double * ar = GNUNET_malloc(size* sizeof (double));
6672 glp_set_prob_name(ats->prob, "gnunet ats bandwidth distribution");
6673 glp_set_obj_dir(ats->prob, GLP_MAX);
6675 /* adding columns */
6677 glp_add_cols(ats->prob, 2 * c_mechs);
6678 /* adding b_t cols */
6679 for (c=1; c <= c_mechs; c++)
6682 GNUNET_asprintf(&name, "p_%s_b%i",GNUNET_i2s(&(mechanisms[c].peer->peer)), c);
6683 glp_set_col_name(ats->prob, c, name);
6685 glp_set_col_bnds(ats->prob, c, GLP_LO, 0.0, 0.0);
6686 glp_set_obj_coef(ats->prob, c, 0);
6689 /* adding n_t cols */
6690 for (c=c_mechs+1; c <= 2*c_mechs; c++)
6692 GNUNET_asprintf(&name, "p_%s_n%i",GNUNET_i2s(&(mechanisms[c-c_mechs].peer->peer)),(c-c_mechs));
6693 glp_set_col_name(ats->prob, c, name);
6695 glp_set_col_bnds(ats->prob, c, GLP_DB, 0.0, 1.0);
6696 glp_set_col_kind(ats->prob, c, GLP_IV);
6697 glp_set_obj_coef(ats->prob, c, 0);
6700 /* feasibility constraints */
6701 /* Constraint 1: one address per peer*/
6703 glp_add_rows(ats->prob, c_peers);
6704 for (c=1; c<=c_peers; c++)
6707 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6709 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 1.0, 1.0);
6711 struct ATS_mechanism *m = peers[c].m_head;
6714 ia[array_index] = row_index;
6715 ja[array_index] = (c_mechs + m->col_index);
6716 ar[array_index] = 1;
6718 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6726 /* Constraint 2: only active mechanism gets bandwidth assigned */
6727 glp_add_rows(ats->prob, c_mechs);
6728 for (c=1; c<=c_mechs; c++)
6730 /* b_t - n_t * M <= 0 */
6732 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6734 glp_set_row_bnds(ats->prob, row_index, GLP_UP, 0.0, 0.0);
6736 ia[array_index] = row_index;
6737 ja[array_index] = mechanisms[c].col_index;
6738 ar[array_index] = 1;
6740 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6743 ia[array_index] = row_index;
6744 ja[array_index] = c_mechs + mechanisms[c].col_index;
6745 ar[array_index] = -M;
6747 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6753 /* Constraint 3: minimum bandwidth*/
6754 glp_add_rows(ats->prob, c_mechs);
6755 for (c=1; c<=c_mechs; c++)
6757 /* b_t - n_t * b_min <= 0 */
6759 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6761 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
6763 ia[array_index] = row_index;
6764 ja[array_index] = mechanisms[c].col_index;
6765 ar[array_index] = 1;
6767 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6770 ia[array_index] = row_index;
6771 ja[array_index] = c_mechs + mechanisms[c].col_index;
6772 ar[array_index] = -v_b_min;
6774 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6780 /* Constraint 4: max ressource capacity */
6781 /* V cr: bt * ct_r <= cr_max
6783 glp_add_rows(ats->prob, available_ressources);
6784 double ct_max = VERY_BIG_DOUBLE_VALUE;
6785 double ct_min = 0.0;
6787 stat->begin_cr = array_index;
6789 for (c=0; c<available_ressources; c++)
6791 ct_max = ressources[c].c_max;
6792 ct_min = ressources[c].c_min;
6794 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
6796 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
6798 for (c2=1; c2<=c_mechs; c2++)
6801 ia[array_index] = row_index;
6802 ja[array_index] = c2;
6803 value = mechanisms[c2].addr->ressources[c].c;
6804 ar[array_index] = value;
6806 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6812 stat->end_cr = array_index--;
6814 /* Constraint 5: min number of connections*/
6815 glp_add_rows(ats->prob, 1);
6816 for (c=1; c<=c_mechs; c++)
6818 // b_t - n_t * b_min >= 0
6820 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6822 glp_set_row_bnds(ats->prob, row_index, GLP_LO, v_n_min, 0.0);
6824 ia[array_index] = row_index;
6825 ja[array_index] = c_mechs + mechanisms[c].col_index;
6826 ar[array_index] = 1;
6828 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6834 // optimisation constraints
6838 // Constraint 6: optimize for diversity
6840 col_d = glp_add_cols(ats->prob, 1);
6841 stat->col_d = col_d;
6842 //GNUNET_assert (col_d == (2*c_mechs) + 1);
6843 glp_set_col_name(ats->prob, col_d, "d");
6844 glp_set_obj_coef(ats->prob, col_d, D);
6845 glp_set_col_bnds(ats->prob, col_d, GLP_LO, 0.0, 0.0);
6846 glp_add_rows(ats->prob, 1);
6848 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6850 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6851 for (c=1; c<=c_mechs; c++)
6853 // b_t - n_t * b_min >= 0
6854 ia[array_index] = row_index;
6855 ja[array_index] = c_mechs + mechanisms[c].col_index;
6856 ar[array_index] = 1;
6858 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6862 ia[array_index] = row_index;
6863 ja[array_index] = col_d;
6864 ar[array_index] = -1;
6866 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6872 // Constraint 7: optimize for quality
6874 col_qm = glp_add_cols(ats->prob, c_q_metrics);
6875 stat->col_qm = col_qm;
6876 //GNUNET_assert (col_qm == (2*c_mechs) + 3 + 1);
6877 for (c=0; c< c_q_metrics; c++)
6879 GNUNET_asprintf(&name, "Q_%s",qm[c].name);
6880 glp_set_col_name(ats->prob, col_qm + c, name);
6881 glp_set_col_bnds(ats->prob, col_qm + c, GLP_LO, 0.0, 0.0);
6883 glp_set_obj_coef(ats->prob, col_qm + c, Q[c]);
6885 glp_add_rows(ats->prob, available_quality_metrics);
6886 stat->begin_qm = row_index;
6887 for (c=1; c <= c_q_metrics; c++)
6890 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6893 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6894 for (c2=1; c2<=c_mechs; c2++)
6897 ia[array_index] = row_index;
6898 ja[array_index] = c2;
6899 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
6901 double v0 = 0, v1 = 0, v2 = 0;
6902 v0 = mechanisms[c2].addr->quality[c-1].values[0];
6903 if (v1 < 1) v0 = 0.1;
6904 v1 = mechanisms[c2].addr->quality[c-1].values[1];
6905 if (v1 < 1) v0 = 0.1;
6906 v2 = mechanisms[c2].addr->quality[c-1].values[2];
6907 if (v1 < 1) v0 = 0.1;
6908 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
6911 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
6913 double v0 = 0, v1 = 0, v2 = 0;
6914 v0 = mechanisms[c2].addr->quality[c-1].values[0];
6916 v1 = mechanisms[c2].addr->quality[c-1].values[1];
6918 v2 = mechanisms[c2].addr->quality[c-1].values[2];
6920 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
6922 value = (double) 10 / value;
6926 ar[array_index] = (mechanisms[c2].peer->f) * value ;
6928 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: %s [%i,%i]=%f \n",array_index, qm[c-1].name, ia[array_index], ja[array_index], ar[array_index]);
6933 ia[array_index] = row_index;
6934 ja[array_index] = col_qm + c - 1;
6935 ar[array_index] = -1;
6937 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6942 stat->end_qm = row_index-1;
6944 // Constraint 8: optimize bandwidth utility
6946 col_u = glp_add_cols(ats->prob, 1);
6947 stat->col_u = col_u;
6948 //GNUNET_assert (col_u == (2*c_mechs) + 2);
6949 glp_set_col_name(ats->prob, col_u, "u");
6950 glp_set_obj_coef(ats->prob, col_u, U);
6951 glp_set_col_bnds(ats->prob, col_u, GLP_LO, 0.0, 0.0);
6952 glp_add_rows(ats->prob, 1);
6954 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6956 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6957 for (c=1; c<=c_mechs; c++)
6959 ia[array_index] = row_index;
6960 ja[array_index] = c;
6961 ar[array_index] = mechanisms[c].peer->f;
6963 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6967 ia[array_index] = row_index;
6968 ja[array_index] = col_u;
6969 ar[array_index] = -1;
6971 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6977 // Constraint 9: optimize relativity
6979 col_r = glp_add_cols(ats->prob, 1);
6980 stat->col_r = col_r;
6981 //GNUNET_assert (col_r == (2*c_mechs) + 3);
6982 glp_set_col_name(ats->prob, col_r, "r");
6983 glp_set_obj_coef(ats->prob, col_r, R);
6984 glp_set_col_bnds(ats->prob, col_r, GLP_LO, 0.0, 0.0);
6985 glp_add_rows(ats->prob, c_peers);
6986 for (c=1; c<=c_peers; c++)
6988 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
6990 struct ATS_mechanism *m = peers[c].m_head;
6993 ia[array_index] = row_index;
6994 ja[array_index] = m->col_index;
6995 ar[array_index] = 1 / mechanisms[c].peer->f;
6997 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7002 ia[array_index] = row_index;
7003 ja[array_index] = col_r;
7004 ar[array_index] = -1;
7006 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7013 /* Loading the matrix */
7014 glp_load_matrix(ats->prob, array_index-1, ia, ja, ar);
7016 stat->c_mechs = c_mechs;
7017 stat->c_peers = c_peers;
7019 stat->valid = GNUNET_YES;
7031 void ats_notify_ats_data (
7032 const struct GNUNET_PeerIdentity *peer,
7033 const struct GNUNET_TRANSPORT_ATS_Information *ats_data)
7036 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ATS_notify_ats_data: %s\n",GNUNET_i2s(peer));
7038 ats_calculate_bandwidth_distribution();
7040 #endif //END: HAVE_LIBGLPK
7043 ats_calculate_bandwidth_distribution ()
7047 struct GNUNET_TIME_Absolute start;
7048 struct GNUNET_TIME_Relative creation;
7049 struct GNUNET_TIME_Relative solving;
7050 char *text = "unmodified";
7052 struct GNUNET_TIME_Relative delta = GNUNET_TIME_absolute_get_difference (ats->last, GNUNET_TIME_absolute_get());
7053 if (delta.rel_value < ats->min_delta.rel_value)
7056 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "Minimum time between cycles not reached\n");
7062 if (INT_MAX < ats->max_exec_duration.rel_value)
7065 dur = (int) ats->max_exec_duration.rel_value;
7067 ats->stat.simplex_rerun_required = GNUNET_NO;
7068 start = GNUNET_TIME_absolute_get();
7069 if ((ats->stat.recreate_problem == GNUNET_YES) || (ats->prob==NULL) || (ats->stat.valid == GNUNET_NO))
7072 ats->stat.recreate_problem = GNUNET_YES;
7073 ats_delete_problem ();
7074 ats_create_problem (ats->D, ats->U, ats->R, ats->v_b_min, ats->v_n_min, &ats->stat);
7076 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Peers/Addresses were modified... new problem: %i peer, %i mechs\n", ats->stat.c_peers, ats->stat.c_mechs);
7080 else if ((ats->stat.recreate_problem == GNUNET_NO) && (ats->stat.modified_resources == GNUNET_YES) && (ats->stat.valid == GNUNET_YES))
7082 text = "modified resources";
7083 ats_update_problem_cr();
7085 else if ((ats->stat.recreate_problem == GNUNET_NO) && (ats->stat.modified_quality == GNUNET_YES) && (ats->stat.valid == GNUNET_YES))
7087 text = "modified quality";
7088 ats_update_problem_qm();
7089 //ats_update_problem_qm_TEST ();
7093 else GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Problem is unmodified\n");
7096 creation = GNUNET_TIME_absolute_get_difference(start,GNUNET_TIME_absolute_get());
7097 start = GNUNET_TIME_absolute_get();
7099 ats->stat.solution = GLP_UNDEF;
7100 if (ats->stat.valid == GNUNET_YES)
7102 ats_solve_problem(ats->max_iterations, ats->max_exec_duration.rel_value, ats->stat.c_peers, ats->stat.c_mechs, &ats->stat);
7104 solving = GNUNET_TIME_absolute_get_difference(start,GNUNET_TIME_absolute_get());
7106 if (ats->stat.valid == GNUNET_YES)
7108 int msg_type = GNUNET_ERROR_TYPE_DEBUG;
7110 msg_type = GNUNET_ERROR_TYPE_ERROR;
7112 GNUNET_log (msg_type, "MLP %s: creation time: %llu, execution time: %llu, %i mechanisms, simplex rerun: %s, solution %s\n",
7113 text, creation.rel_value, solving.rel_value,
7115 (ats->stat.simplex_rerun_required == GNUNET_NO) ? "NO" : "YES", (ats->stat.solution == 5) ? "OPTIMAL" : "INVALID");
7116 ats->successful_executions ++;
7117 GNUNET_STATISTICS_set (stats, "# ATS successful executions", ats->successful_executions, GNUNET_NO);
7119 if ((ats->stat.recreate_problem == GNUNET_YES) || (ats->prob==NULL))
7120 GNUNET_STATISTICS_set (stats, "ATS state",ATS_NEW, GNUNET_NO);
7121 else if ((ats->stat.modified_resources == GNUNET_YES) &&
7122 (ats->stat.modified_quality == GNUNET_NO))
7123 GNUNET_STATISTICS_set (stats, "ATS state", ATS_C_UPDATED, GNUNET_NO);
7124 else if ((ats->stat.modified_resources == GNUNET_NO) &&
7125 (ats->stat.modified_quality == GNUNET_YES) &&
7126 (ats->stat.simplex_rerun_required == GNUNET_NO))
7127 GNUNET_STATISTICS_set (stats, "ATS state", ATS_Q_UPDATED, GNUNET_NO);
7128 else if ((ats->stat.modified_resources == GNUNET_YES) &&
7129 (ats->stat.modified_quality == GNUNET_YES) &&
7130 (ats->stat.simplex_rerun_required == GNUNET_NO))
7131 GNUNET_STATISTICS_set (stats, "ATS state", ATS_QC_UPDATED, GNUNET_NO);
7132 else if (ats->stat.simplex_rerun_required == GNUNET_NO)
7133 GNUNET_STATISTICS_set (stats, "ATS state", ATS_UNMODIFIED, GNUNET_NO);
7137 if (ats->stat.c_peers != 0)
7139 ats->invalid_executions ++;
7140 GNUNET_STATISTICS_set (stats, "# ATS invalid executions", ats->invalid_executions, GNUNET_NO);
7144 GNUNET_STATISTICS_set (stats, "# ATS successful executions", ats->successful_executions, GNUNET_NO);
7148 GNUNET_STATISTICS_set (stats, "ATS duration", solving.rel_value + creation.rel_value, GNUNET_NO);
7149 GNUNET_STATISTICS_set (stats, "ATS mechanisms", ats->stat.c_mechs, GNUNET_NO);
7150 GNUNET_STATISTICS_set (stats, "ATS peers", ats->stat.c_peers, GNUNET_NO);
7151 GNUNET_STATISTICS_set (stats, "ATS solution", ats->stat.solution, GNUNET_NO);
7152 GNUNET_STATISTICS_set (stats, "ATS timestamp", start.abs_value, GNUNET_NO);
7154 if ((ats->save_mlp == GNUNET_YES) && (ats->stat.c_mechs >= ats->dump_min_peers) && (ats->stat.c_mechs >= ats->dump_min_addr))
7157 if (ats->dump_overwrite == GNUNET_NO)
7159 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i_%s_%llu.mlp",
7160 ats->stat.c_peers, ats->stat.c_mechs, text, GNUNET_TIME_absolute_get().abs_value);
7161 glp_write_lp (ats->prob, NULL, filename);
7165 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i.mlp",
7166 ats->stat.c_peers, ats->stat.c_mechs );
7167 glp_write_lp (ats->prob, NULL, filename);
7169 GNUNET_free (filename);
7171 if ((ats->save_solution == GNUNET_YES) && (ats->stat.c_mechs >= ats->dump_min_peers) && (ats->stat.c_mechs >= ats->dump_min_addr))
7174 if (ats->dump_overwrite == GNUNET_NO)
7176 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i_%s_%llu.sol",
7177 ats->stat.c_peers, ats->stat.c_mechs, text, GNUNET_TIME_absolute_get().abs_value);
7178 glp_print_sol (ats->prob, filename);
7182 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i.sol",
7183 ats->stat.c_peers, ats->stat.c_mechs);
7184 glp_print_sol (ats->prob, filename);
7186 GNUNET_free (filename);
7189 ats->last = GNUNET_TIME_absolute_get();
7190 ats->stat.recreate_problem = GNUNET_NO;
7191 ats->stat.modified_resources = GNUNET_NO;
7192 ats->stat.modified_quality = GNUNET_NO;
7197 ats_schedule_calculation (void *cls,
7198 const struct GNUNET_SCHEDULER_TaskContext *tc)
7200 struct ATS_info *ats = (struct ATS_info *) cls;
7201 if (ats==NULL) return;
7203 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7204 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
7208 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Running scheduled calculation\n");
7211 ats_calculate_bandwidth_distribution (ats);
7213 ats->ats_task = GNUNET_SCHEDULER_add_delayed (ats->exec_interval,
7214 &ats_schedule_calculation, ats);
7220 unsigned long long value;
7223 ats = GNUNET_malloc(sizeof (struct ATS_info));
7225 ats->min_delta = ATS_MIN_INTERVAL;
7226 ats->exec_interval = ATS_EXEC_INTERVAL;
7227 ats->max_exec_duration = ATS_MAX_EXEC_DURATION;
7228 ats->max_iterations = ATS_MAX_ITERATIONS;
7229 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7232 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "GLPK not installed, ATS not active\n");
7239 ats->v_b_min = 64000;
7241 ats->dump_min_peers = 1;
7242 ats->dump_min_addr = 1;
7243 ats->dump_overwrite = GNUNET_NO;
7244 ats->mechanisms = NULL;
7246 ats->successful_executions = 0;
7247 ats->invalid_executions = 0;
7253 /* loading cost ressources */
7254 for (c=0; c<available_ressources; c++)
7256 GNUNET_asprintf(§ion,"%s_UP",ressources[c].cfg_param);
7257 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
7259 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "transport",section, &value))
7262 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found ressource cost: [%s] = %llu\n", section, value);
7264 ressources[c].c_max = value;
7267 GNUNET_free (section);
7268 GNUNET_asprintf(§ion,"%s_DOWN",ressources[c].cfg_param);
7269 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
7271 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "transport",section, &value))
7274 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found ressource cost: [%s] = %llu\n", section, value);
7276 ressources[c].c_min = value;
7279 GNUNET_free (section);
7282 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MLP"))
7283 ats->save_mlp = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_MLP");
7285 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_SOLUTION"))
7286 ats->save_solution = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_SOLUTION");
7287 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
7288 ats->dump_overwrite = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_OVERWRITE");
7289 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_PEERS"))
7291 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_MIN_PEERS", &value);
7292 ats->dump_min_peers= value;
7294 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_ADDRS"))
7296 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_MIN_ADDRS", &value);
7297 ats->dump_min_addr= value;
7299 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
7301 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_OVERWRITE", &value);
7302 ats->min_delta.rel_value = value;
7305 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
7307 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_MIN_INTERVAL", &value);
7308 ats->min_delta.rel_value = value;
7311 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_EXEC_INTERVAL"))
7313 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_EXEC_INTERVAL", &value);
7314 ats->exec_interval.rel_value = value;
7316 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
7318 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_MIN_INTERVAL", &value);
7319 ats->min_delta.rel_value = value;
7322 ats->ats_task = GNUNET_SCHEDULER_add_now(&ats_schedule_calculation, ats);
7326 static void ats_shutdown ()
7329 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_destroy\n");
7331 if (ats->ats_task != GNUNET_SCHEDULER_NO_TASK)
7332 GNUNET_SCHEDULER_cancel(ats->ats_task);
7333 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7336 ats_delete_problem ();
7343 void ats_notify_peer_connect (
7344 const struct GNUNET_PeerIdentity *peer,
7345 const struct GNUNET_TRANSPORT_ATS_Information *ats_data, int ats_count)
7348 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_connect: %s\n",GNUNET_i2s(peer));
7350 //update_addr_ats();
7351 ats->stat.recreate_problem = GNUNET_YES;
7352 ats_calculate_bandwidth_distribution(ats);
7355 void ats_notify_peer_disconnect (
7356 const struct GNUNET_PeerIdentity *peer)
7359 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_disconnect: %s\n",GNUNET_i2s(peer));
7361 ats->stat.recreate_problem = GNUNET_YES;
7362 ats_calculate_bandwidth_distribution (ats);
7365 struct ForeignAddressList * ats_get_preferred_address (
7366 struct NeighbourList *n)
7369 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ats_get_prefered_transport for peer: %s\n",GNUNET_i2s(&n->id));
7371 struct ReadyList *next = n->plugins;
7372 while (next != NULL)
7375 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "plugin: %s %i\n",next->plugin->short_name,strcmp(next->plugin->short_name,"unix"));
7379 return find_ready_address(n);
7383 * Initiate transport service.
7385 * @param cls closure
7386 * @param server the initialized server
7387 * @param c configuration to use
7391 struct GNUNET_SERVER_Handle *server,
7392 const struct GNUNET_CONFIGURATION_Handle *c)
7394 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
7395 {&handle_start, NULL,
7396 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
7397 {&handle_hello, NULL,
7398 GNUNET_MESSAGE_TYPE_HELLO, 0},
7399 {&handle_send, NULL,
7400 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
7401 {&handle_request_connect, NULL,
7402 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT, sizeof(struct TransportRequestConnectMessage)},
7403 {&handle_set_quota, NULL,
7404 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
7405 {&handle_address_lookup, NULL,
7406 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP,
7408 {&handle_blacklist_init, NULL,
7409 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT, sizeof (struct GNUNET_MessageHeader)},
7410 {&handle_blacklist_reply, NULL,
7411 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY, sizeof (struct BlacklistMessage)},
7417 unsigned long long tneigh;
7421 stats = GNUNET_STATISTICS_create ("transport", cfg);
7422 validation_map = GNUNET_CONTAINER_multihashmap_create (64);
7423 /* parse configuration */
7425 GNUNET_CONFIGURATION_get_value_number (c,
7430 GNUNET_CONFIGURATION_get_value_filename (c,
7432 "HOSTKEY", &keyfile)))
7434 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7436 ("Transport service is lacking key configuration settings. Exiting.\n"));
7437 GNUNET_SCHEDULER_shutdown ();
7440 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7443 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7444 validation_map = NULL;
7448 max_connect_per_transport = (uint32_t) tneigh;
7449 peerinfo = GNUNET_PEERINFO_connect (cfg);
7450 if (peerinfo == NULL)
7452 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7453 _("Could not access PEERINFO service. Exiting.\n"));
7454 GNUNET_SCHEDULER_shutdown ();
7457 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7460 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7461 validation_map = NULL;
7462 GNUNET_free (keyfile);
7465 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
7466 GNUNET_free (keyfile);
7467 if (my_private_key == NULL)
7469 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7471 ("Transport service could not access hostkey. Exiting.\n"));
7472 GNUNET_SCHEDULER_shutdown ();
7475 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7478 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7479 validation_map = NULL;
7482 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
7483 GNUNET_CRYPTO_hash (&my_public_key,
7484 sizeof (my_public_key), &my_identity.hashPubKey);
7485 /* setup notification */
7486 GNUNET_SERVER_disconnect_notify (server,
7487 &client_disconnect_notification, NULL);
7488 /* load plugins... */
7491 GNUNET_CONFIGURATION_get_value_string (c,
7492 "TRANSPORT", "PLUGINS", &plugs))
7494 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
7495 _("Starting transport plugins `%s'\n"), plugs);
7496 pos = strtok (plugs, " ");
7499 start_transport (server, pos);
7501 pos = strtok (NULL, " ");
7503 GNUNET_free (plugs);
7505 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
7506 &shutdown_task, NULL);
7513 GNUNET_log (GNUNET_ERROR_TYPE_INFO, _("Transport service ready.\n"));
7515 /* If we have a blacklist file, read from it */
7516 read_blacklist_file(cfg);
7517 /* process client requests */
7518 GNUNET_SERVER_add_handlers (server, handlers);
7523 * The main function for the transport service.
7525 * @param argc number of arguments from the command line
7526 * @param argv command line arguments
7527 * @return 0 ok, 1 on error
7530 main (int argc, char *const *argv)
7532 a2s (NULL, NULL, 0); /* make compiler happy */
7533 return (GNUNET_OK ==
7534 GNUNET_SERVICE_run (argc,
7537 GNUNET_SERVICE_OPTION_NONE,
7538 &run, NULL)) ? 0 : 1;
7541 /* end of gnunet-service-transport.c */