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;
1326 static int update_addr_ats (struct ForeignAddressList *fal, const struct GNUNET_TRANSPORT_ATS_Information *ats_data, int ats_count)
1330 for (c1=0; c1<ats_count; c1++)
1332 set = update_addr_value(fal, ntohl(ats_data[c1].value), ntohl(ats_data[c1].type));
1338 * Find an entry in the transport list for a particular transport.
1340 * @return NULL if not found.
1342 static struct TransportPlugin *
1343 find_transport (const char *short_name)
1345 struct TransportPlugin *head = plugins;
1346 while ((head != NULL) && (0 != strcmp (short_name, head->short_name)))
1352 * Is a particular peer blacklisted for a particular transport?
1354 * @param peer the peer to check for
1355 * @param plugin the plugin used to connect to the peer
1357 * @return GNUNET_YES if the peer is blacklisted, GNUNET_NO if not
1360 is_blacklisted (const struct GNUNET_PeerIdentity *peer, struct TransportPlugin *plugin)
1363 if (plugin->blacklist != NULL)
1365 if (GNUNET_CONTAINER_multihashmap_contains (plugin->blacklist, &peer->hashPubKey) == GNUNET_YES)
1368 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1369 "Peer `%s:%s' is blacklisted!\n",
1370 plugin->short_name, GNUNET_i2s (peer));
1373 GNUNET_STATISTICS_update (stats, "# blacklisted peers refused", 1, GNUNET_NO);
1383 add_peer_to_blacklist (struct GNUNET_PeerIdentity *peer, char *transport_name)
1385 struct TransportPlugin *plugin;
1387 plugin = find_transport(transport_name);
1388 if (plugin == NULL) /* Nothing to do */
1390 if (plugin->blacklist == NULL)
1391 plugin->blacklist = GNUNET_CONTAINER_multihashmap_create(TRANSPORT_BLACKLIST_HT_SIZE);
1392 GNUNET_assert(plugin->blacklist != NULL);
1393 GNUNET_CONTAINER_multihashmap_put(plugin->blacklist, &peer->hashPubKey,
1395 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1400 * Read the blacklist file, containing transport:peer entries.
1401 * Provided the transport is loaded, set up hashmap with these
1402 * entries to blacklist peers by transport.
1406 read_blacklist_file (const struct GNUNET_CONFIGURATION_Handle *cfg)
1413 struct GNUNET_PeerIdentity pid;
1415 struct GNUNET_CRYPTO_HashAsciiEncoded enc;
1416 unsigned int entries_found;
1417 char *transport_name;
1420 GNUNET_CONFIGURATION_get_value_filename (cfg,
1426 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1427 "Option `%s' in section `%s' not specified!\n",
1433 if (GNUNET_OK != GNUNET_DISK_file_test (fn))
1434 GNUNET_DISK_fn_write (fn, NULL, 0, GNUNET_DISK_PERM_USER_READ
1435 | GNUNET_DISK_PERM_USER_WRITE);
1436 if (0 != STAT (fn, &frstat))
1438 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1439 _("Could not read blacklist file `%s'\n"), fn);
1443 if (frstat.st_size == 0)
1446 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1447 _("Blacklist file `%s' is empty.\n"),
1453 /* FIXME: use mmap */
1454 data = GNUNET_malloc_large (frstat.st_size);
1455 GNUNET_assert(data != NULL);
1456 if (frstat.st_size !=
1457 GNUNET_DISK_fn_read (fn, data, frstat.st_size))
1459 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1460 _("Failed to read blacklist from `%s'\n"), fn);
1467 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1469 while ((frstat.st_size >= sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded)) &&
1470 (pos <= frstat.st_size - sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded)))
1473 while ((colon_pos < frstat.st_size) && (data[colon_pos] != ':') && !isspace ( (unsigned char) data[colon_pos]))
1476 if (colon_pos >= frstat.st_size)
1478 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1479 _("Syntax error in blacklist file at offset %llu, giving up!\n"),
1480 (unsigned long long) colon_pos);
1486 if (isspace( (unsigned char) data[colon_pos]))
1488 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1489 _("Syntax error in blacklist file at offset %llu, skipping bytes.\n"),
1490 (unsigned long long) colon_pos);
1492 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1496 tsize = colon_pos - pos;
1497 if ((pos >= frstat.st_size) || (pos + tsize >= frstat.st_size) || (tsize == 0))
1499 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1500 _("Syntax error in blacklist file at offset %llu, giving up!\n"),
1501 (unsigned long long) colon_pos);
1510 transport_name = GNUNET_malloc(tsize + 1);
1511 memcpy(transport_name, &data[pos], tsize);
1512 pos = colon_pos + 1;
1514 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1515 "Read transport name %s in blacklist file.\n",
1518 memcpy (&enc, &data[pos], sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded));
1519 if (!isspace ( (unsigned char) enc.encoding[sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded) - 1]))
1521 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1522 _("Syntax error in blacklist file at offset %llu, skipping bytes.\n"),
1523 (unsigned long long) pos);
1525 while ((pos < frstat.st_size) && (!isspace ( (unsigned char) data[pos])))
1527 GNUNET_free_non_null(transport_name);
1530 enc.encoding[sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded) - 1] = '\0';
1531 if (GNUNET_OK != GNUNET_CRYPTO_hash_from_string ((char *) &enc, &pid.hashPubKey))
1533 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1534 _("Syntax error in blacklist file at offset %llu, skipping bytes `%s'.\n"),
1535 (unsigned long long) pos,
1540 if (0 != memcmp (&pid,
1542 sizeof (struct GNUNET_PeerIdentity)))
1545 add_peer_to_blacklist (&pid,
1550 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1551 _("Found myself `%s' in blacklist (useless, ignored)\n"),
1555 pos = pos + sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded);
1556 GNUNET_free_non_null(transport_name);
1557 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1560 GNUNET_STATISTICS_update (stats, "# Transport entries blacklisted", entries_found, GNUNET_NO);
1567 * Function called to notify a client about the socket being ready to
1568 * queue more data. "buf" will be NULL and "size" zero if the socket
1569 * was closed for writing in the meantime.
1571 * @param cls closure
1572 * @param size number of bytes available in buf
1573 * @param buf where the callee should write the message
1574 * @return number of bytes written to buf
1577 transmit_to_client_callback (void *cls, size_t size, void *buf)
1579 struct TransportClient *client = cls;
1580 struct ClientMessageQueueEntry *q;
1583 const struct GNUNET_MessageHeader *msg;
1590 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1591 "Transmission to client failed, closing connection.\n");
1593 /* fatal error with client, free message queue! */
1594 while (NULL != (q = client->message_queue_head))
1596 GNUNET_STATISTICS_update (stats,
1597 gettext_noop ("# bytes discarded (could not transmit to client)"),
1598 ntohs (((const struct GNUNET_MessageHeader*)&q[1])->size),
1600 GNUNET_CONTAINER_DLL_remove (client->message_queue_head,
1601 client->message_queue_tail,
1605 client->message_count = 0;
1610 while (NULL != (q = client->message_queue_head))
1612 msg = (const struct GNUNET_MessageHeader *) &q[1];
1613 msize = ntohs (msg->size);
1614 if (msize + tsize > size)
1617 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1618 "Transmitting message of type %u to client.\n",
1621 GNUNET_CONTAINER_DLL_remove (client->message_queue_head,
1622 client->message_queue_tail,
1624 memcpy (&cbuf[tsize], msg, msize);
1627 client->message_count--;
1631 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
1632 client->th = GNUNET_SERVER_notify_transmit_ready (client->client,
1634 GNUNET_TIME_UNIT_FOREVER_REL,
1635 &transmit_to_client_callback,
1637 GNUNET_assert (client->th != NULL);
1644 * Convert an address to a string.
1646 * @param plugin name of the plugin responsible for the address
1647 * @param addr binary address
1648 * @param addr_len number of bytes in addr
1649 * @return NULL on error, otherwise address string
1652 a2s (const char *plugin,
1656 struct TransportPlugin *p;
1660 p = find_transport (plugin);
1663 return p->api->address_to_string (p->api->cls,
1670 * Mark the given FAL entry as 'connected' (and hence preferred for
1671 * sending); also mark all others for the same peer as 'not connected'
1672 * (since only one can be preferred).
1674 * @param fal address to set to 'connected'
1677 mark_address_connected (struct ForeignAddressList *fal)
1679 struct ForeignAddressList *pos;
1682 GNUNET_assert (GNUNET_YES == fal->validated);
1683 if (fal->connected == GNUNET_YES)
1684 return; /* nothing to do */
1686 pos = fal->ready_list->addresses;
1689 if (GNUNET_YES == pos->connected)
1692 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1693 "Marking address `%s' as no longer connected (due to connect on other address)\n",
1694 a2s (pos->ready_list->plugin->short_name,
1698 GNUNET_break (cnt == GNUNET_YES);
1700 pos->connected = GNUNET_NO;
1701 GNUNET_STATISTICS_update (stats,
1702 gettext_noop ("# connected addresses"),
1708 fal->connected = GNUNET_YES;
1709 if (GNUNET_YES == cnt)
1711 GNUNET_STATISTICS_update (stats,
1712 gettext_noop ("# connected addresses"),
1720 * Send the specified message to the specified client. Since multiple
1721 * messages may be pending for the same client at a time, this code
1722 * makes sure that no message is lost.
1724 * @param client client to transmit the message to
1725 * @param msg the message to send
1726 * @param may_drop can this message be dropped if the
1727 * message queue for this client is getting far too large?
1730 transmit_to_client (struct TransportClient *client,
1731 const struct GNUNET_MessageHeader *msg, int may_drop)
1733 struct ClientMessageQueueEntry *q;
1736 if ((client->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
1738 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1740 ("Dropping message of type %u and size %u, have %u messages pending (%u is the soft limit)\n"),
1743 client->message_count,
1745 GNUNET_STATISTICS_update (stats,
1746 gettext_noop ("# messages dropped due to slow client"),
1751 msize = ntohs (msg->size);
1752 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
1753 q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
1754 memcpy (&q[1], msg, msize);
1755 GNUNET_CONTAINER_DLL_insert_after (client->message_queue_head,
1756 client->message_queue_tail,
1757 client->message_queue_tail,
1759 client->message_count++;
1760 if (client->th == NULL)
1762 client->th = GNUNET_SERVER_notify_transmit_ready (client->client,
1764 GNUNET_TIME_UNIT_FOREVER_REL,
1765 &transmit_to_client_callback,
1767 GNUNET_assert (client->th != NULL);
1773 * Transmit a 'SEND_OK' notification to the given client for the
1776 * @param client who to notify
1777 * @param n neighbour to notify about, can be NULL (on failure)
1778 * @param target target of the transmission
1779 * @param result status code for the transmission request
1782 transmit_send_ok (struct TransportClient *client,
1783 struct NeighbourList *n,
1784 const struct GNUNET_PeerIdentity *target,
1787 struct SendOkMessage send_ok_msg;
1789 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
1790 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
1791 send_ok_msg.success = htonl (result);
1793 send_ok_msg.latency = GNUNET_TIME_relative_hton (n->latency);
1795 send_ok_msg.latency = GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
1796 send_ok_msg.peer = *target;
1797 transmit_to_client (client, &send_ok_msg.header, GNUNET_NO);
1802 * Function called by the GNUNET_TRANSPORT_TransmitFunction
1803 * upon "completion" of a send request. This tells the API
1804 * that it is now legal to send another message to the given
1807 * @param cls closure, identifies the entry on the
1808 * message queue that was transmitted and the
1809 * client responsible for queuing the message
1810 * @param target the peer receiving the message
1811 * @param result GNUNET_OK on success, if the transmission
1812 * failed, we should not tell the client to transmit
1816 transmit_send_continuation (void *cls,
1817 const struct GNUNET_PeerIdentity *target,
1820 struct MessageQueue *mq = cls;
1821 struct NeighbourList *n;
1823 GNUNET_STATISTICS_update (stats,
1824 gettext_noop ("# bytes pending with plugins"),
1825 - (int64_t) mq->message_buf_size,
1827 if (result == GNUNET_OK)
1829 GNUNET_STATISTICS_update (stats,
1830 gettext_noop ("# bytes successfully transmitted by plugins"),
1831 mq->message_buf_size,
1836 GNUNET_STATISTICS_update (stats,
1837 gettext_noop ("# bytes with transmission failure by plugins"),
1838 mq->message_buf_size,
1841 if (mq->specific_address != NULL)
1843 if (result == GNUNET_OK)
1845 mq->specific_address->timeout =
1846 GNUNET_TIME_relative_to_absolute
1847 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
1848 if (mq->specific_address->validated == GNUNET_YES)
1849 mark_address_connected (mq->specific_address);
1853 if (mq->specific_address->connected != GNUNET_NO)
1856 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1857 "Marking address `%s' as no longer connected (due to transmission problem)\n",
1858 a2s (mq->specific_address->ready_list->plugin->short_name,
1859 mq->specific_address->addr,
1860 mq->specific_address->addrlen));
1862 GNUNET_STATISTICS_update (stats,
1863 gettext_noop ("# connected addresses"),
1866 mq->specific_address->connected = GNUNET_NO;
1869 if (! mq->internal_msg)
1870 mq->specific_address->in_transmit = GNUNET_NO;
1872 n = find_neighbour(&mq->neighbour_id);
1873 if (mq->client != NULL)
1874 transmit_send_ok (mq->client, n, target, result);
1877 try_transmission_to_peer (n);
1882 * Find an address in any of the available transports for
1883 * the given neighbour that would be good for message
1884 * transmission. This is essentially the transport selection
1887 * @param neighbour for whom to select an address
1888 * @return selected address, NULL if we have none
1890 struct ForeignAddressList *
1891 find_ready_address(struct NeighbourList *neighbour)
1893 struct ReadyList *head = neighbour->plugins;
1894 struct ForeignAddressList *addresses;
1895 struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
1896 struct ForeignAddressList *best_address;
1898 /* Hack to prefer unix domain sockets */
1899 struct ForeignAddressList *unix_address = NULL;
1901 best_address = NULL;
1902 while (head != NULL)
1904 addresses = head->addresses;
1905 while (addresses != NULL)
1907 if ( (addresses->timeout.abs_value < now.abs_value) &&
1908 (addresses->connected == GNUNET_YES) )
1911 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1912 "Marking long-time inactive connection to `%4s' as down.\n",
1913 GNUNET_i2s (&neighbour->id));
1915 GNUNET_STATISTICS_update (stats,
1916 gettext_noop ("# connected addresses"),
1919 addresses->connected = GNUNET_NO;
1921 addresses = addresses->next;
1924 addresses = head->addresses;
1925 while (addresses != NULL)
1927 #if DEBUG_TRANSPORT > 1
1928 if (addresses->addr != NULL)
1929 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1930 "Have address `%s' for peer `%4s' (status: %d, %d, %d, %u, %llums, %u)\n",
1931 a2s (head->plugin->short_name,
1933 addresses->addrlen),
1934 GNUNET_i2s (&neighbour->id),
1935 addresses->connected,
1936 addresses->in_transmit,
1937 addresses->validated,
1938 addresses->connect_attempts,
1939 (unsigned long long) addresses->timeout.abs_value,
1940 (unsigned int) addresses->distance);
1942 if (0==strcmp(head->plugin->short_name,"unix"))
1944 if ((unix_address == NULL) || ((unix_address != NULL) &&
1945 (addresses->latency.rel_value < unix_address->latency.rel_value)))
1946 unix_address = addresses;
1948 if ( ( (best_address == NULL) ||
1949 (addresses->connected == GNUNET_YES) ||
1950 (best_address->connected == GNUNET_NO) ) &&
1951 (addresses->in_transmit == GNUNET_NO) &&
1952 ( (best_address == NULL) ||
1953 (addresses->latency.rel_value < best_address->latency.rel_value)) )
1954 best_address = addresses;
1955 /* FIXME: also give lower-latency addresses that are not
1956 connected a chance some times... */
1957 addresses = addresses->next;
1959 if (unix_address != NULL)
1963 if (unix_address != NULL)
1965 best_address = unix_address;
1967 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found unix address, forced this address\n");
1970 if (best_address != NULL)
1974 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1975 "Best address found (`%s') has latency of %llu ms.\n",
1976 (best_address->addrlen > 0)
1977 ? a2s (best_address->ready_list->plugin->short_name,
1979 best_address->addrlen)
1981 best_address->latency.rel_value);
1986 GNUNET_STATISTICS_update (stats,
1987 gettext_noop ("# transmission attempts failed (no address)"),
1992 return best_address;
1998 * We should re-try transmitting to the given peer,
1999 * hopefully we've learned something in the meantime.
2002 retry_transmission_task (void *cls,
2003 const struct GNUNET_SCHEDULER_TaskContext *tc)
2005 struct NeighbourList *n = cls;
2007 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
2008 try_transmission_to_peer (n);
2013 * Check the ready list for the given neighbour and if a plugin is
2014 * ready for transmission (and if we have a message), do so!
2016 * @param neighbour target peer for which to transmit
2019 try_transmission_to_peer (struct NeighbourList *n)
2021 struct ReadyList *rl;
2022 struct MessageQueue *mq;
2023 struct GNUNET_TIME_Relative timeout;
2027 if (n->messages_head == NULL)
2030 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2031 "Transmission queue for `%4s' is empty\n",
2032 GNUNET_i2s (&n->id));
2034 return; /* nothing to do */
2037 mq = n->messages_head;
2038 force_address = GNUNET_YES;
2039 if (mq->specific_address == NULL)
2042 mq->specific_address = ats_get_preferred_address(n);
2043 GNUNET_STATISTICS_update (stats,
2044 gettext_noop ("# transport selected peer address freely"),
2047 force_address = GNUNET_NO;
2049 if (mq->specific_address == NULL)
2051 GNUNET_STATISTICS_update (stats,
2052 gettext_noop ("# transport failed to selected peer address"),
2055 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
2056 if (timeout.rel_value == 0)
2059 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2060 "No destination address available to transmit message of size %u to peer `%4s'\n",
2061 mq->message_buf_size,
2062 GNUNET_i2s (&mq->neighbour_id));
2064 GNUNET_STATISTICS_update (stats,
2065 gettext_noop ("# bytes in message queue for other peers"),
2066 - (int64_t) mq->message_buf_size,
2068 GNUNET_STATISTICS_update (stats,
2069 gettext_noop ("# bytes discarded (no destination address available)"),
2070 mq->message_buf_size,
2072 if (mq->client != NULL)
2073 transmit_send_ok (mq->client, n, &n->id, GNUNET_NO);
2074 GNUNET_CONTAINER_DLL_remove (n->messages_head,
2078 return; /* nobody ready */
2080 GNUNET_STATISTICS_update (stats,
2081 gettext_noop ("# message delivery deferred (no address)"),
2084 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
2085 GNUNET_SCHEDULER_cancel (n->retry_task);
2086 n->retry_task = GNUNET_SCHEDULER_add_delayed (timeout,
2087 &retry_transmission_task,
2090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2091 "No validated destination address available to transmit message of size %u to peer `%4s', will wait %llums to find an address.\n",
2092 mq->message_buf_size,
2093 GNUNET_i2s (&mq->neighbour_id),
2096 /* FIXME: might want to trigger peerinfo lookup here
2097 (unless that's already pending...) */
2100 GNUNET_CONTAINER_DLL_remove (n->messages_head,
2103 if (mq->specific_address->connected == GNUNET_NO)
2104 mq->specific_address->connect_attempts++;
2105 rl = mq->specific_address->ready_list;
2106 mq->plugin = rl->plugin;
2107 if (!mq->internal_msg)
2108 mq->specific_address->in_transmit = GNUNET_YES;
2110 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2111 "Sending message of size %u for `%4s' to `%s' via plugin `%s'\n",
2112 mq->message_buf_size,
2113 GNUNET_i2s (&n->id),
2114 (mq->specific_address->addr != NULL)
2115 ? a2s (mq->plugin->short_name,
2116 mq->specific_address->addr,
2117 mq->specific_address->addrlen)
2119 rl->plugin->short_name);
2121 GNUNET_STATISTICS_update (stats,
2122 gettext_noop ("# bytes in message queue for other peers"),
2123 - (int64_t) mq->message_buf_size,
2125 GNUNET_STATISTICS_update (stats,
2126 gettext_noop ("# bytes pending with plugins"),
2127 mq->message_buf_size,
2129 ret = rl->plugin->api->send (rl->plugin->api->cls,
2132 mq->message_buf_size,
2134 GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
2135 mq->specific_address->session,
2136 mq->specific_address->addr,
2137 mq->specific_address->addrlen,
2139 &transmit_send_continuation, mq);
2142 /* failure, but 'send' would not call continuation in this case,
2143 so we need to do it here! */
2144 transmit_send_continuation (mq,
2152 * Send the specified message to the specified peer.
2154 * @param client source of the transmission request (can be NULL)
2155 * @param peer_address ForeignAddressList where we should send this message
2156 * @param priority how important is the message
2157 * @param timeout how long do we have to transmit?
2158 * @param message_buf message(s) to send GNUNET_MessageHeader(s)
2159 * @param message_buf_size total size of all messages in message_buf
2160 * @param is_internal is this an internal message; these are pre-pended and
2161 * also do not count for plugins being "ready" to transmit
2162 * @param neighbour handle to the neighbour for transmission
2165 transmit_to_peer (struct TransportClient *client,
2166 struct ForeignAddressList *peer_address,
2167 unsigned int priority,
2168 struct GNUNET_TIME_Relative timeout,
2169 const char *message_buf,
2170 size_t message_buf_size,
2171 int is_internal, struct NeighbourList *neighbour)
2173 struct MessageQueue *mq;
2178 /* check for duplicate submission */
2179 mq = neighbour->messages_head;
2182 if (mq->client == client)
2184 /* client transmitted to same peer twice
2185 before getting SEND_OK! */
2193 GNUNET_STATISTICS_update (stats,
2194 gettext_noop ("# bytes in message queue for other peers"),
2197 mq = GNUNET_malloc (sizeof (struct MessageQueue) + message_buf_size);
2198 mq->specific_address = peer_address;
2199 mq->client = client;
2200 /* FIXME: this memcpy can be up to 7% of our total runtime! */
2201 memcpy (&mq[1], message_buf, message_buf_size);
2202 mq->message_buf = (const char*) &mq[1];
2203 mq->message_buf_size = message_buf_size;
2204 memcpy(&mq->neighbour_id, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
2205 mq->internal_msg = is_internal;
2206 mq->priority = priority;
2207 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
2209 GNUNET_CONTAINER_DLL_insert (neighbour->messages_head,
2210 neighbour->messages_tail,
2213 GNUNET_CONTAINER_DLL_insert_after (neighbour->messages_head,
2214 neighbour->messages_tail,
2215 neighbour->messages_tail,
2217 try_transmission_to_peer (neighbour);
2224 struct GeneratorContext
2226 struct TransportPlugin *plug_pos;
2227 struct OwnAddressList *addr_pos;
2228 struct GNUNET_TIME_Absolute expiration;
2236 address_generator (void *cls, size_t max, void *buf)
2238 struct GeneratorContext *gc = cls;
2241 while ((gc->addr_pos == NULL) && (gc->plug_pos != NULL))
2243 gc->plug_pos = gc->plug_pos->next;
2244 gc->addr_pos = (gc->plug_pos != NULL) ? gc->plug_pos->addresses : NULL;
2246 if (NULL == gc->plug_pos)
2251 ret = GNUNET_HELLO_add_address (gc->plug_pos->short_name,
2254 gc->addr_pos->addrlen, buf, max);
2255 gc->addr_pos = gc->addr_pos->next;
2261 * Construct our HELLO message from all of the addresses of
2262 * all of the transports.
2267 struct GNUNET_HELLO_Message *hello;
2268 struct TransportClient *cpos;
2269 struct NeighbourList *npos;
2270 struct GeneratorContext gc;
2272 gc.plug_pos = plugins;
2273 gc.addr_pos = plugins != NULL ? plugins->addresses : NULL;
2274 gc.expiration = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
2275 hello = GNUNET_HELLO_create (&my_public_key, &address_generator, &gc);
2277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2278 "Refreshed my `%s', new size is %d\n", "HELLO", GNUNET_HELLO_size(hello));
2280 GNUNET_STATISTICS_update (stats,
2281 gettext_noop ("# refreshed my HELLO"),
2285 while (cpos != NULL)
2287 transmit_to_client (cpos,
2288 (const struct GNUNET_MessageHeader *) hello,
2293 GNUNET_free_non_null (our_hello);
2295 GNUNET_PEERINFO_add_peer (peerinfo, our_hello);
2297 while (npos != NULL)
2300 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2301 "Transmitting updated `%s' to neighbour `%4s'\n",
2302 "HELLO", GNUNET_i2s (&npos->id));
2304 GNUNET_STATISTICS_update (stats,
2305 gettext_noop ("# transmitted my HELLO to other peers"),
2308 transmit_to_peer (NULL, NULL, 0,
2309 HELLO_ADDRESS_EXPIRATION,
2310 (const char *) our_hello,
2311 GNUNET_HELLO_size(our_hello),
2319 * Task used to clean up expired addresses for a plugin.
2321 * @param cls closure
2325 expire_address_task (void *cls,
2326 const struct GNUNET_SCHEDULER_TaskContext *tc);
2330 * Update the list of addresses for this plugin,
2331 * expiring those that are past their expiration date.
2333 * @param plugin addresses of which plugin should be recomputed?
2334 * @param fresh set to GNUNET_YES if a new address was added
2335 * and we need to regenerate the HELLO even if nobody
2339 update_addresses (struct TransportPlugin *plugin,
2342 static struct GNUNET_TIME_Absolute last_update;
2343 struct GNUNET_TIME_Relative min_remaining;
2344 struct GNUNET_TIME_Relative remaining;
2345 struct GNUNET_TIME_Absolute now;
2346 struct OwnAddressList *pos;
2347 struct OwnAddressList *prev;
2348 struct OwnAddressList *next;
2351 if (plugin->address_update_task != GNUNET_SCHEDULER_NO_TASK)
2352 GNUNET_SCHEDULER_cancel (plugin->address_update_task);
2353 plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
2354 now = GNUNET_TIME_absolute_get ();
2355 min_remaining = GNUNET_TIME_UNIT_FOREVER_REL;
2356 expired = (GNUNET_TIME_absolute_get_duration (last_update).rel_value > (HELLO_ADDRESS_EXPIRATION.rel_value / 4));
2358 pos = plugin->addresses;
2362 if (pos->expires.abs_value < now.abs_value)
2364 expired = GNUNET_YES;
2366 plugin->addresses = pos->next;
2368 prev->next = pos->next;
2373 remaining = GNUNET_TIME_absolute_get_remaining (pos->expires);
2374 if (remaining.rel_value < min_remaining.rel_value)
2375 min_remaining = remaining;
2381 if (expired || fresh)
2386 min_remaining = GNUNET_TIME_relative_min (min_remaining,
2387 GNUNET_TIME_relative_divide (HELLO_ADDRESS_EXPIRATION,
2389 plugin->address_update_task
2390 = GNUNET_SCHEDULER_add_delayed (min_remaining,
2391 &expire_address_task, plugin);
2396 * Task used to clean up expired addresses for a plugin.
2398 * @param cls closure
2402 expire_address_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2404 struct TransportPlugin *plugin = cls;
2406 plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
2407 if (0 == (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2408 update_addresses (plugin, GNUNET_NO);
2413 * Iterator over hash map entries that NULLs the session of validation
2414 * entries that match the given session.
2416 * @param cls closure (the 'struct Session*' to match against)
2417 * @param key current key code (peer ID, not used)
2418 * @param value value in the hash map ('struct ValidationEntry*')
2419 * @return GNUNET_YES (we should continue to iterate)
2422 remove_session_validations (void *cls,
2423 const GNUNET_HashCode * key,
2426 struct Session *session = cls;
2427 struct ValidationEntry *ve = value;
2429 if (session == ve->session)
2436 * We've been disconnected from the other peer (for some
2437 * connection-oriented transport). Either quickly
2438 * re-establish the connection or signal the disconnect
2441 * Only signal CORE level disconnect if ALL addresses
2442 * for the peer are exhausted.
2444 * @param p overall plugin context
2445 * @param nl neighbour that was disconnected
2448 try_fast_reconnect (struct TransportPlugin *p,
2449 struct NeighbourList *nl)
2451 /* FIXME-MW: fast reconnect / transport switching not implemented... */
2452 /* Note: the idea here is to hide problems with transports (or
2453 switching between plugins) from the core to eliminate the need to
2454 re-negotiate session keys and the like; OTOH, we should tell core
2455 quickly (much faster than timeout) `if a connection was lost and
2456 could not be re-established (i.e. other peer went down or is
2457 unable / refuses to communicate);
2459 So we should consider:
2460 1) ideally: our own willingness / need to connect
2461 2) prior failures to connect to this peer (by plugin)
2462 3) ideally: reasons why other peer terminated (as far as knowable)
2464 Most importantly, it must be POSSIBLE for another peer to terminate
2465 a connection for a while (without us instantly re-establishing it).
2466 Similarly, if another peer is gone we should quickly notify CORE.
2467 OTOH, if there was a minor glitch (i.e. crash of gnunet-service-transport
2468 on the other end), we should reconnect in such a way that BOTH CORE
2469 services never even notice.
2470 Furthermore, the same mechanism (or small variation) could be used
2471 to switch to a better-performing plugin (ATS).
2473 Finally, this needs to be tested throughly... */
2476 * GNUNET_NO in the call below makes transport disconnect the peer,
2477 * even if only a single address (out of say, six) went away. This
2478 * function must be careful to ONLY disconnect if the peer is gone,
2479 * not just a specifi address.
2481 * More specifically, half the places it was used had it WRONG.
2484 /* No reconnect, signal disconnect instead! */
2485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2486 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&nl->id),
2487 "try_fast_reconnect");
2488 disconnect_neighbour (nl, GNUNET_YES);
2493 * Function that will be called whenever the plugin internally
2494 * cleans up a session pointer and hence the service needs to
2495 * discard all of those sessions as well. Plugins that do not
2496 * use sessions can simply omit calling this function and always
2497 * use NULL wherever a session pointer is needed.
2499 * @param cls closure
2500 * @param peer which peer was the session for
2501 * @param session which session is being destoyed
2504 plugin_env_session_end (void *cls,
2505 const struct GNUNET_PeerIdentity *peer,
2506 struct Session *session)
2508 struct TransportPlugin *p = cls;
2509 struct NeighbourList *nl;
2510 struct ReadyList *rl;
2511 struct ForeignAddressList *pos;
2512 struct ForeignAddressList *prev;
2514 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
2515 &remove_session_validations,
2517 nl = find_neighbour (peer);
2519 return; /* was never marked as connected */
2523 if (rl->plugin == p)
2528 return; /* was never marked as connected */
2530 pos = rl->addresses;
2531 while ( (pos != NULL) &&
2532 (pos->session != session) )
2538 return; /* was never marked as connected */
2539 pos->session = NULL;
2540 if (pos->addrlen != 0)
2542 if (nl->received_pong != GNUNET_NO)
2543 try_fast_reconnect (p, nl);
2546 /* was inbound connection, free 'pos' */
2548 rl->addresses = pos->next;
2550 prev->next = pos->next;
2551 if (GNUNET_SCHEDULER_NO_TASK != pos->revalidate_task)
2553 GNUNET_SCHEDULER_cancel (pos->revalidate_task);
2554 pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
2556 GNUNET_free_non_null(pos->ressources);
2557 GNUNET_free_non_null(pos->quality);
2559 ats->stat.recreate_problem = GNUNET_YES;
2560 if (nl->received_pong == GNUNET_NO)
2561 return; /* nothing to do, never connected... */
2562 /* check if we have any validated addresses left */
2563 pos = rl->addresses;
2568 try_fast_reconnect (p, nl);
2573 /* no valid addresses left, signal disconnect! */
2575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2576 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&nl->id),
2577 "plugin_env_session_end");
2578 /* FIXME: This doesn't mean there are no addresses left for this PEER,
2579 * it means there aren't any left for this PLUGIN/PEER combination! So
2580 * calling disconnect_neighbor here with GNUNET_NO forces disconnect
2581 * when it isn't necessary. Using GNUNET_YES at least checks to see
2582 * if there are any addresses that work first, so as not to overdo it.
2585 disconnect_neighbour (nl, GNUNET_YES);
2590 * Function that must be called by each plugin to notify the
2591 * transport service about the addresses under which the transport
2592 * provided by the plugin can be reached.
2594 * @param cls closure
2595 * @param name name of the transport that generated the address
2596 * @param addr one of the addresses of the host, NULL for the last address
2597 * the specific address format depends on the transport
2598 * @param addrlen length of the address
2599 * @param expires when should this address automatically expire?
2602 plugin_env_notify_address (void *cls,
2606 struct GNUNET_TIME_Relative expires)
2608 struct TransportPlugin *p = cls;
2609 struct OwnAddressList *al;
2610 struct GNUNET_TIME_Absolute abex;
2612 GNUNET_assert (addr != NULL);
2613 abex = GNUNET_TIME_relative_to_absolute (expires);
2614 GNUNET_assert (p == find_transport (name));
2618 if ( (addrlen == al->addrlen) &&
2619 (0 == memcmp (addr, &al[1], addrlen)) )
2622 update_addresses (p, GNUNET_NO);
2627 al = GNUNET_malloc (sizeof (struct OwnAddressList) + addrlen);
2628 al->next = p->addresses;
2631 al->addrlen = addrlen;
2632 memcpy (&al[1], addr, addrlen);
2633 update_addresses (p, GNUNET_YES);
2638 * Notify all of our clients about a peer connecting.
2641 notify_clients_connect (const struct GNUNET_PeerIdentity *peer,
2642 struct GNUNET_TIME_Relative latency,
2645 struct ConnectInfoMessage * cim;
2646 struct TransportClient *cpos;
2651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2652 "Notifying clients about connection from `%s'\n",
2655 GNUNET_STATISTICS_update (stats,
2656 gettext_noop ("# peers connected"),
2661 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
2662 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
2666 cim = GNUNET_malloc (size);
2668 cim->header.size = htons (size);
2669 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
2670 cim->ats_count = htonl(2);
2671 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
2672 (&(cim->ats))[0].value = htonl (distance);
2673 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
2674 (&(cim->ats))[1].value = htonl ((uint32_t) latency.rel_value);
2675 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
2676 (&(cim->ats))[2].value = htonl (0);
2677 memcpy (&cim->id, peer, sizeof (struct GNUNET_PeerIdentity));
2679 /* notify ats about connecting peer */
2680 ats_notify_peer_connect (peer, &(cim->ats), 2);
2683 while (cpos != NULL)
2685 transmit_to_client (cpos, &(cim->header), GNUNET_NO);
2694 * Notify all of our clients about a peer disconnecting.
2697 notify_clients_disconnect (const struct GNUNET_PeerIdentity *peer)
2699 struct DisconnectInfoMessage dim;
2700 struct TransportClient *cpos;
2703 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2704 "Notifying clients about lost connection to `%s'\n",
2707 GNUNET_STATISTICS_update (stats,
2708 gettext_noop ("# peers connected"),
2711 dim.header.size = htons (sizeof (struct DisconnectInfoMessage));
2712 dim.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
2713 dim.reserved = htonl (0);
2714 memcpy (&dim.peer, peer, sizeof (struct GNUNET_PeerIdentity));
2716 /* notify ats about connecting peer */
2717 ats_notify_peer_disconnect (peer);
2720 while (cpos != NULL)
2722 transmit_to_client (cpos, &dim.header, GNUNET_NO);
2729 * Find a ForeignAddressList entry for the given neighbour
2730 * that matches the given address and transport.
2732 * @param neighbour which peer we care about
2733 * @param tname name of the transport plugin
2734 * @param session session to look for, NULL for 'any'; otherwise
2735 * can be used for the service to "learn" this session ID
2737 * @param addr binary address
2738 * @param addrlen length of addr
2739 * @return NULL if no such entry exists
2741 static struct ForeignAddressList *
2742 find_peer_address(struct NeighbourList *neighbour,
2744 struct Session *session,
2748 struct ReadyList *head;
2749 struct ForeignAddressList *pos;
2751 head = neighbour->plugins;
2752 while (head != NULL)
2754 if (0 == strcmp (tname, head->plugin->short_name))
2760 pos = head->addresses;
2761 while ( (pos != NULL) &&
2762 ( (pos->addrlen != addrlen) ||
2763 (memcmp(pos->addr, addr, addrlen) != 0) ) )
2765 if ( (session != NULL) &&
2766 (pos->session == session) )
2770 if ( (session != NULL) && (pos != NULL) )
2771 pos->session = session; /* learn it! */
2777 * Get the peer address struct for the given neighbour and
2778 * address. If it doesn't yet exist, create it.
2780 * @param neighbour which peer we care about
2781 * @param tname name of the transport plugin
2782 * @param session session of the plugin, or NULL for none
2783 * @param addr binary address
2784 * @param addrlen length of addr
2785 * @return NULL if we do not have a transport plugin for 'tname'
2787 static struct ForeignAddressList *
2788 add_peer_address (struct NeighbourList *neighbour,
2790 struct Session *session,
2794 struct ReadyList *head;
2795 struct ForeignAddressList *ret;
2798 ret = find_peer_address (neighbour, tname, session, addr, addrlen);
2801 head = neighbour->plugins;
2803 while (head != NULL)
2805 if (0 == strcmp (tname, head->plugin->short_name))
2811 ret = GNUNET_malloc(sizeof(struct ForeignAddressList) + addrlen);
2812 ret->session = session;
2813 if ((addrlen > 0) && (addr != NULL))
2815 ret->addr = (const char*) &ret[1];
2816 memcpy (&ret[1], addr, addrlen);
2823 ret->ressources = GNUNET_malloc(available_ressources * sizeof (struct ATS_ressource_entry));
2824 for (c=0; c<available_ressources; c++)
2826 struct ATS_ressource_entry *r = ret->ressources;
2828 r[c].atis_index = ressources[c].atis_index;
2829 if (0 == strcmp(neighbour->plugins->plugin->short_name,"unix"))
2831 r[c].c = ressources[c].c_unix;
2833 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"udp"))
2835 r[c].c = ressources[c].c_udp;
2837 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"tcp"))
2839 r[c].c = ressources[c].c_tcp;
2841 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"http"))
2843 r[c].c = ressources[c].c_http;
2845 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"https"))
2847 r[c].c = ressources[c].c_https;
2849 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"wlan"))
2851 r[c].c = ressources[c].c_wlan;
2855 r[c].c = ressources[c].c_default;
2856 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2857 "Assigning default cost to peer `%s' addr plugin `%s'! This should not happen!\n",
2858 GNUNET_i2s(&neighbour->peer),
2859 neighbour->plugins->plugin->short_name);
2863 ret->quality = GNUNET_malloc (available_quality_metrics * sizeof (struct ATS_quality_entry));
2864 ret->addrlen = addrlen;
2865 ret->expires = GNUNET_TIME_relative_to_absolute
2866 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2867 ret->latency = GNUNET_TIME_relative_get_forever();
2869 ret->timeout = GNUNET_TIME_relative_to_absolute
2870 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2871 ret->ready_list = head;
2872 ret->next = head->addresses;
2873 head->addresses = ret;
2879 * Closure for 'add_validated_address'.
2881 struct AddValidatedAddressContext
2884 * Entry that has been validated.
2886 const struct ValidationEntry *ve;
2889 * Flag set after we have added the address so
2890 * that we terminate the iteration next time.
2897 * Callback function used to fill a buffer of max bytes with a list of
2898 * addresses in the format used by HELLOs. Should use
2899 * "GNUNET_HELLO_add_address" as a helper function.
2901 * @param cls the 'struct AddValidatedAddressContext' with the validated address
2902 * @param max maximum number of bytes that can be written to buf
2903 * @param buf where to write the address information
2904 * @return number of bytes written, 0 to signal the
2905 * end of the iteration.
2908 add_validated_address (void *cls,
2909 size_t max, void *buf)
2911 struct AddValidatedAddressContext *avac = cls;
2912 const struct ValidationEntry *ve = avac->ve;
2914 if (GNUNET_YES == avac->done)
2916 avac->done = GNUNET_YES;
2917 return GNUNET_HELLO_add_address (ve->transport_name,
2918 GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION),
2928 * Closure for 'check_address_exists'.
2930 struct CheckAddressExistsClosure
2933 * Address to check for.
2938 * Name of the transport.
2945 struct Session *session;
2948 * Set to GNUNET_YES if the address exists.
2961 * Iterator over hash map entries. Checks if the given
2962 * validation entry is for the same address as what is given
2965 * @param cls the 'struct CheckAddressExistsClosure*'
2966 * @param key current key code (ignored)
2967 * @param value value in the hash map ('struct ValidationEntry')
2968 * @return GNUNET_YES if we should continue to
2969 * iterate (mismatch), GNUNET_NO if not (entry matched)
2972 check_address_exists (void *cls,
2973 const GNUNET_HashCode * key,
2976 struct CheckAddressExistsClosure *caec = cls;
2977 struct ValidationEntry *ve = value;
2979 if ( (0 == strcmp (caec->tname,
2980 ve->transport_name)) &&
2981 (caec->addrlen == ve->addrlen) &&
2982 (0 == memcmp (caec->addr,
2986 caec->exists = GNUNET_YES;
2989 if ( (ve->session != NULL) &&
2990 (caec->session == ve->session) )
2992 caec->exists = GNUNET_YES;
3001 * Iterator to free entries in the validation_map.
3003 * @param cls closure (unused)
3004 * @param key current key code
3005 * @param value value in the hash map (validation to abort)
3006 * @return GNUNET_YES (always)
3009 abort_validation (void *cls,
3010 const GNUNET_HashCode * key,
3013 struct ValidationEntry *va = value;
3015 if (GNUNET_SCHEDULER_NO_TASK != va->timeout_task)
3016 GNUNET_SCHEDULER_cancel (va->timeout_task);
3017 GNUNET_free (va->transport_name);
3018 if (va->chvc != NULL)
3020 va->chvc->ve_count--;
3021 if (va->chvc->ve_count == 0)
3023 GNUNET_CONTAINER_DLL_remove (chvc_head,
3026 GNUNET_free (va->chvc);
3036 * HELLO validation cleanup task (validation failed).
3038 * @param cls the 'struct ValidationEntry' that failed
3039 * @param tc scheduler context (unused)
3042 timeout_hello_validation (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3044 struct ValidationEntry *va = cls;
3045 struct GNUNET_PeerIdentity pid;
3047 va->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3048 GNUNET_STATISTICS_update (stats,
3049 gettext_noop ("# address validation timeouts"),
3052 GNUNET_CRYPTO_hash (&va->publicKey,
3054 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
3056 GNUNET_break (GNUNET_OK ==
3057 GNUNET_CONTAINER_multihashmap_remove (validation_map,
3060 abort_validation (NULL, NULL, va);
3065 neighbour_timeout_task (void *cls,
3066 const struct GNUNET_SCHEDULER_TaskContext *tc)
3068 struct NeighbourList *n = cls;
3071 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
3072 "Neighbour `%4s' has timed out!\n", GNUNET_i2s (&n->id));
3074 GNUNET_STATISTICS_update (stats,
3075 gettext_noop ("# disconnects due to timeout"),
3078 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3079 disconnect_neighbour (n, GNUNET_NO);
3084 * Schedule the job that will cause us to send a PING to the
3085 * foreign address to evaluate its validity and latency.
3087 * @param fal address to PING
3090 schedule_next_ping (struct ForeignAddressList *fal);
3094 * Add the given address to the list of foreign addresses
3095 * available for the given peer (check for duplicates).
3097 * @param cls the respective 'struct NeighbourList' to update
3098 * @param tname name of the transport
3099 * @param expiration expiration time
3100 * @param addr the address
3101 * @param addrlen length of the address
3102 * @return GNUNET_OK (always)
3105 add_to_foreign_address_list (void *cls,
3107 struct GNUNET_TIME_Absolute expiration,
3111 struct NeighbourList *n = cls;
3112 struct ForeignAddressList *fal;
3115 GNUNET_STATISTICS_update (stats,
3116 gettext_noop ("# valid peer addresses returned by PEERINFO"),
3120 fal = find_peer_address (n, tname, NULL, addr, addrlen);
3123 #if DEBUG_TRANSPORT_HELLO
3124 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3125 "Adding address `%s' (%s) for peer `%4s' due to PEERINFO data for %llums.\n",
3126 a2s (tname, addr, addrlen),
3128 GNUNET_i2s (&n->id),
3129 expiration.abs_value);
3131 fal = add_peer_address (n, tname, NULL, addr, addrlen);
3134 GNUNET_STATISTICS_update (stats,
3135 gettext_noop ("# previously validated addresses lacking transport"),
3141 fal->expires = GNUNET_TIME_absolute_max (expiration,
3143 schedule_next_ping (fal);
3149 fal->expires = GNUNET_TIME_absolute_max (expiration,
3154 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3155 "Failed to add new address for `%4s'\n",
3156 GNUNET_i2s (&n->id));
3159 if (fal->validated == GNUNET_NO)
3161 fal->validated = GNUNET_YES;
3162 GNUNET_STATISTICS_update (stats,
3163 gettext_noop ("# peer addresses considered valid"),
3167 if (try == GNUNET_YES)
3169 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3170 "Have new addresses, will try to trigger transmissions.\n");
3171 try_transmission_to_peer (n);
3178 * Add addresses in validated HELLO "h" to the set of addresses
3179 * we have for this peer.
3181 * @param cls closure ('struct NeighbourList*')
3182 * @param peer id of the peer, NULL for last call
3183 * @param h hello message for the peer (can be NULL)
3184 * @param err_msg NULL if successful, otherwise contains error message
3187 add_hello_for_peer (void *cls,
3188 const struct GNUNET_PeerIdentity *peer,
3189 const struct GNUNET_HELLO_Message *h,
3190 const char *err_msg)
3192 struct NeighbourList *n = cls;
3194 if (err_msg != NULL)
3196 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3197 _("Error in communication with PEERINFO service\n"));
3202 GNUNET_STATISTICS_update (stats,
3203 gettext_noop ("# outstanding peerinfo iterate requests"),
3210 return; /* no HELLO available */
3212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3213 "Peerinfo had `%s' message for peer `%4s', adding existing addresses.\n",
3217 if (GNUNET_YES != n->public_key_valid)
3219 GNUNET_HELLO_get_key (h, &n->publicKey);
3220 n->public_key_valid = GNUNET_YES;
3222 GNUNET_HELLO_iterate_addresses (h,
3224 &add_to_foreign_address_list,
3230 * Create a fresh entry in our neighbour list for the given peer.
3231 * Will try to transmit our current HELLO to the new neighbour.
3232 * Do not call this function directly, use 'setup_peer_check_blacklist.
3234 * @param peer the peer for which we create the entry
3235 * @param do_hello should we schedule transmitting a HELLO
3236 * @return the new neighbour list entry
3238 static struct NeighbourList *
3239 setup_new_neighbour (const struct GNUNET_PeerIdentity *peer,
3242 struct NeighbourList *n;
3243 struct TransportPlugin *tp;
3244 struct ReadyList *rl;
3247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3248 "Setting up state for neighbour `%4s'\n",
3251 GNUNET_assert (our_hello != NULL);
3252 GNUNET_STATISTICS_update (stats,
3253 gettext_noop ("# active neighbours"),
3256 n = GNUNET_malloc (sizeof (struct NeighbourList));
3257 n->next = neighbours;
3261 GNUNET_TIME_relative_to_absolute
3262 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
3263 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
3264 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
3265 MAX_BANDWIDTH_CARRY_S);
3269 if ((tp->api->send != NULL) && (!is_blacklisted(peer, tp)))
3271 rl = GNUNET_malloc (sizeof (struct ReadyList));
3273 rl->next = n->plugins;
3276 rl->addresses = NULL;
3280 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
3282 n->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
3283 &neighbour_timeout_task, n);
3286 GNUNET_STATISTICS_update (stats,
3287 gettext_noop ("# peerinfo new neighbor iterate requests"),
3290 GNUNET_STATISTICS_update (stats,
3291 gettext_noop ("# outstanding peerinfo iterate requests"),
3294 n->piter = GNUNET_PEERINFO_iterate (peerinfo, peer,
3295 GNUNET_TIME_UNIT_FOREVER_REL,
3296 &add_hello_for_peer, n);
3298 GNUNET_STATISTICS_update (stats,
3299 gettext_noop ("# HELLO's sent to new neighbors"),
3302 transmit_to_peer (NULL, NULL, 0,
3303 HELLO_ADDRESS_EXPIRATION,
3304 (const char *) our_hello, GNUNET_HELLO_size(our_hello),
3312 * Function called after we have checked if communicating
3313 * with a given peer is acceptable.
3315 * @param cls closure
3316 * @param n NULL if communication is not acceptable
3318 typedef void (*SetupContinuation)(void *cls,
3319 struct NeighbourList *n);
3323 * Information kept for each client registered to perform
3329 * This is a linked list.
3331 struct Blacklisters *next;
3334 * This is a linked list.
3336 struct Blacklisters *prev;
3339 * Client responsible for this entry.
3341 struct GNUNET_SERVER_Client *client;
3344 * Blacklist check that we're currently performing.
3346 struct BlacklistCheck *bc;
3352 * Head of DLL of blacklisting clients.
3354 static struct Blacklisters *bl_head;
3357 * Tail of DLL of blacklisting clients.
3359 static struct Blacklisters *bl_tail;
3363 * Context we use when performing a blacklist check.
3365 struct BlacklistCheck
3369 * This is a linked list.
3371 struct BlacklistCheck *next;
3374 * This is a linked list.
3376 struct BlacklistCheck *prev;
3379 * Peer being checked.
3381 struct GNUNET_PeerIdentity peer;
3384 * Option for setup neighbour afterwards.
3389 * Continuation to call with the result.
3391 SetupContinuation cont;
3399 * Current transmission request handle for this client, or NULL if no
3400 * request is pending.
3402 struct GNUNET_CONNECTION_TransmitHandle *th;
3405 * Our current position in the blacklisters list.
3407 struct Blacklisters *bl_pos;
3410 * Current task performing the check.
3412 GNUNET_SCHEDULER_TaskIdentifier task;
3417 * Head of DLL of active blacklisting queries.
3419 static struct BlacklistCheck *bc_head;
3422 * Tail of DLL of active blacklisting queries.
3424 static struct BlacklistCheck *bc_tail;
3428 * Perform next action in the blacklist check.
3430 * @param cls the 'struct BlacklistCheck*'
3434 do_blacklist_check (void *cls,
3435 const struct GNUNET_SCHEDULER_TaskContext *tc);
3438 * Transmit blacklist query to the client.
3440 * @param cls the 'struct BlacklistCheck'
3441 * @param size number of bytes allowed
3442 * @param buf where to copy the message
3443 * @return number of bytes copied to buf
3446 transmit_blacklist_message (void *cls,
3450 struct BlacklistCheck *bc = cls;
3451 struct Blacklisters *bl;
3452 struct BlacklistMessage bm;
3457 GNUNET_assert (bc->task == GNUNET_SCHEDULER_NO_TASK);
3458 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3463 bm.header.size = htons (sizeof (struct BlacklistMessage));
3464 bm.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_QUERY);
3465 bm.is_allowed = htonl (0);
3467 memcpy (buf, &bm, sizeof (bm));
3468 GNUNET_SERVER_receive_done (bl->client, GNUNET_OK);
3474 * Perform next action in the blacklist check.
3476 * @param cls the 'struct BlacklistCheck*'
3480 do_blacklist_check (void *cls,
3481 const struct GNUNET_SCHEDULER_TaskContext *tc)
3483 struct BlacklistCheck *bc = cls;
3484 struct Blacklisters *bl;
3486 bc->task = GNUNET_SCHEDULER_NO_TASK;
3490 bc->cont (bc->cont_cls,
3491 setup_new_neighbour (&bc->peer, bc->do_hello));
3498 bc->th = GNUNET_SERVER_notify_transmit_ready (bl->client,
3499 sizeof (struct BlacklistMessage),
3500 GNUNET_TIME_UNIT_FOREVER_REL,
3501 &transmit_blacklist_message,
3508 * Obtain a 'struct NeighbourList' for the given peer. If such an entry
3509 * does not yet exist, check the blacklist. If the blacklist says creating
3510 * one is acceptable, create one and call the continuation; otherwise
3511 * call the continuation with NULL.
3513 * @param peer peer to setup or look up a struct NeighbourList for
3514 * @param do_hello should we also schedule sending our HELLO to the peer
3515 * if this is a new record
3516 * @param cont function to call with the 'struct NeigbhbourList*'
3517 * @param cont_cls closure for cont
3520 setup_peer_check_blacklist (const struct GNUNET_PeerIdentity *peer,
3522 SetupContinuation cont,
3525 struct NeighbourList *n;
3526 struct BlacklistCheck *bc;
3528 n = find_neighbour(peer);
3535 if (bl_head == NULL)
3538 cont (cont_cls, setup_new_neighbour (peer, do_hello));
3540 setup_new_neighbour(peer, do_hello);
3543 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3544 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3546 bc->do_hello = do_hello;
3548 bc->cont_cls = cont_cls;
3549 bc->bl_pos = bl_head;
3550 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3556 * Function called with the result of querying a new blacklister about
3557 * it being allowed (or not) to continue to talk to an existing neighbour.
3559 * @param cls the original 'struct NeighbourList'
3560 * @param n NULL if we need to disconnect
3563 confirm_or_drop_neighbour (void *cls,
3564 struct NeighbourList *n)
3566 struct NeighbourList * orig = cls;
3570 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3571 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&orig->id),
3572 "confirm_or_drop_neighboUr");
3573 disconnect_neighbour (orig, GNUNET_NO);
3579 * Handle a request to start a blacklist.
3581 * @param cls closure (always NULL)
3582 * @param client identification of the client
3583 * @param message the actual message
3586 handle_blacklist_init (void *cls,
3587 struct GNUNET_SERVER_Client *client,
3588 const struct GNUNET_MessageHeader *message)
3590 struct Blacklisters *bl;
3591 struct BlacklistCheck *bc;
3592 struct NeighbourList *n;
3597 if (bl->client == client)
3600 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3605 bl = GNUNET_malloc (sizeof (struct Blacklisters));
3606 bl->client = client;
3607 GNUNET_SERVER_client_keep (client);
3608 GNUNET_CONTAINER_DLL_insert_after (bl_head, bl_tail, bl_tail, bl);
3609 /* confirm that all existing connections are OK! */
3613 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3614 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3616 bc->do_hello = GNUNET_NO;
3617 bc->cont = &confirm_or_drop_neighbour;
3620 if (n == neighbours) /* all would wait for the same client, no need to
3621 create more than just the first task right now */
3622 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3630 * Handle a request to blacklist a peer.
3632 * @param cls closure (always NULL)
3633 * @param client identification of the client
3634 * @param message the actual message
3637 handle_blacklist_reply (void *cls,
3638 struct GNUNET_SERVER_Client *client,
3639 const struct GNUNET_MessageHeader *message)
3641 const struct BlacklistMessage *msg = (const struct BlacklistMessage*) message;
3642 struct Blacklisters *bl;
3643 struct BlacklistCheck *bc;
3646 while ( (bl != NULL) &&
3647 (bl->client != client) )
3651 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3656 if (ntohl (msg->is_allowed) == GNUNET_SYSERR)
3658 bc->cont (bc->cont_cls, NULL);
3659 GNUNET_CONTAINER_DLL_remove (bc_head, bc_tail, bc);
3664 bc->bl_pos = bc->bl_pos->next;
3665 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3668 /* check if any other bc's are waiting for this blacklister */
3672 if ( (bc->bl_pos == bl) &&
3673 (GNUNET_SCHEDULER_NO_TASK == bc->task) )
3674 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3682 * Send periodic PING messages to a given foreign address.
3684 * @param cls our 'struct PeriodicValidationContext*'
3685 * @param tc task context
3688 send_periodic_ping (void *cls,
3689 const struct GNUNET_SCHEDULER_TaskContext *tc)
3691 struct ForeignAddressList *peer_address = cls;
3692 struct TransportPlugin *tp;
3693 struct ValidationEntry *va;
3694 struct NeighbourList *neighbour;
3695 struct TransportPingMessage ping;
3696 struct CheckAddressExistsClosure caec;
3698 uint16_t hello_size;
3702 peer_address->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
3703 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3705 tp = peer_address->ready_list->plugin;
3706 neighbour = peer_address->ready_list->neighbour;
3707 if (GNUNET_YES != neighbour->public_key_valid)
3709 /* no public key yet, try again later */
3710 schedule_next_ping (peer_address);
3713 caec.addr = peer_address->addr;
3714 caec.addrlen = peer_address->addrlen;
3715 caec.tname = tp->short_name;
3716 caec.session = peer_address->session;
3717 caec.exists = GNUNET_NO;
3718 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
3719 &check_address_exists,
3721 if (caec.exists == GNUNET_YES)
3723 /* During validation attempts we will likely trigger the other
3724 peer trying to validate our address which in turn will cause
3725 it to send us its HELLO, so we expect to hit this case rather
3726 frequently. Only print something if we are very verbose. */
3727 #if DEBUG_TRANSPORT > 1
3728 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3729 "Some validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
3730 (peer_address->addr != NULL)
3731 ? a2s (tp->short_name,
3733 peer_address->addrlen)
3736 GNUNET_i2s (&neighbour->id));
3738 schedule_next_ping (peer_address);
3741 va = GNUNET_malloc (sizeof (struct ValidationEntry) + peer_address->addrlen);
3742 va->transport_name = GNUNET_strdup (tp->short_name);
3743 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
3745 va->send_time = GNUNET_TIME_absolute_get();
3746 va->session = peer_address->session;
3747 if (peer_address->addr != NULL)
3749 va->addr = (const void*) &va[1];
3750 memcpy (&va[1], peer_address->addr, peer_address->addrlen);
3751 va->addrlen = peer_address->addrlen;
3753 memcpy(&va->publicKey,
3754 &neighbour->publicKey,
3755 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
3757 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
3758 &timeout_hello_validation,
3760 GNUNET_CONTAINER_multihashmap_put (validation_map,
3761 &neighbour->id.hashPubKey,
3763 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3765 if (peer_address->validated != GNUNET_YES)
3766 hello_size = GNUNET_HELLO_size(our_hello);
3770 tsize = sizeof(struct TransportPingMessage) + hello_size;
3772 if (peer_address->addr != NULL)
3774 slen = strlen (tp->short_name) + 1;
3775 tsize += slen + peer_address->addrlen;
3779 slen = 0; /* make gcc happy */
3781 message_buf = GNUNET_malloc(tsize);
3782 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
3783 ping.challenge = htonl(va->challenge);
3784 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
3785 if (peer_address->validated != GNUNET_YES)
3787 memcpy(message_buf, our_hello, hello_size);
3790 if (peer_address->addr != NULL)
3792 ping.header.size = htons(sizeof(struct TransportPingMessage) +
3793 peer_address->addrlen +
3795 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
3798 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
3800 peer_address->addrlen);
3804 ping.header.size = htons(sizeof(struct TransportPingMessage));
3807 memcpy(&message_buf[hello_size],
3809 sizeof(struct TransportPingMessage));
3811 #if DEBUG_TRANSPORT_REVALIDATION
3812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3813 "Performing re-validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s'\n",
3814 (peer_address->addr != NULL)
3815 ? a2s (peer_address->plugin->short_name,
3817 peer_address->addrlen)
3820 GNUNET_i2s (&neighbour->id),
3821 "HELLO", hello_size,
3824 if (peer_address->validated != GNUNET_YES)
3825 GNUNET_STATISTICS_update (stats,
3826 gettext_noop ("# PING with HELLO messages sent"),
3830 GNUNET_STATISTICS_update (stats,
3831 gettext_noop ("# PING without HELLO messages sent"),
3834 GNUNET_STATISTICS_update (stats,
3835 gettext_noop ("# PING messages sent for re-validation"),
3838 transmit_to_peer (NULL, peer_address,
3839 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
3840 HELLO_VERIFICATION_TIMEOUT,
3842 GNUNET_YES, neighbour);
3843 GNUNET_free(message_buf);
3844 schedule_next_ping (peer_address);
3849 * Schedule the job that will cause us to send a PING to the
3850 * foreign address to evaluate its validity and latency.
3852 * @param fal address to PING
3855 schedule_next_ping (struct ForeignAddressList *fal)
3857 struct GNUNET_TIME_Relative delay;
3859 if (fal->revalidate_task != GNUNET_SCHEDULER_NO_TASK)
3861 delay = GNUNET_TIME_absolute_get_remaining (fal->expires);
3862 delay.rel_value /= 2; /* do before expiration */
3863 delay = GNUNET_TIME_relative_min (delay,
3864 LATENCY_EVALUATION_MAX_DELAY);
3865 if (GNUNET_YES != fal->estimated)
3867 delay = GNUNET_TIME_UNIT_ZERO;
3868 fal->estimated = GNUNET_YES;
3870 if (GNUNET_YES == fal->connected)
3872 delay = GNUNET_TIME_relative_min (delay,
3873 CONNECTED_LATENCY_EVALUATION_MAX_DELAY);
3875 /* FIXME: also adjust delay based on how close the last
3876 observed latency is to the latency of the best alternative */
3877 /* bound how fast we can go */
3878 delay = GNUNET_TIME_relative_max (delay,
3879 GNUNET_TIME_UNIT_SECONDS);
3880 /* randomize a bit (to avoid doing all at the same time) */
3881 delay.rel_value += GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1000);
3882 fal->revalidate_task = GNUNET_SCHEDULER_add_delayed(delay,
3883 &send_periodic_ping,
3891 * Function that will be called if we receive some payload
3892 * from another peer.
3894 * @param message the payload
3895 * @param n peer who claimed to be the sender
3898 handle_payload_message (const struct GNUNET_MessageHeader *message,
3899 struct NeighbourList *n)
3901 struct InboundMessage *im;
3902 struct TransportClient *cpos;
3905 msize = ntohs (message->size);
3906 if (n->received_pong == GNUNET_NO)
3908 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3909 "Received message of type %u and size %u from `%4s', but no pong yet!!\n",
3910 ntohs (message->type),
3911 ntohs (message->size),
3912 GNUNET_i2s (&n->id));
3913 GNUNET_free_non_null (n->pre_connect_message_buffer);
3914 n->pre_connect_message_buffer = GNUNET_malloc (msize);
3915 memcpy (n->pre_connect_message_buffer, message, msize);
3920 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3921 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
3922 ntohs (message->type),
3923 ntohs (message->size),
3924 GNUNET_i2s (&n->id));
3926 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3929 n->quota_violation_count++;
3931 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3932 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
3933 n->in_tracker.available_bytes_per_s__,
3934 n->quota_violation_count);
3936 /* Discount 32k per violation */
3937 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3942 if (n->quota_violation_count > 0)
3944 /* try to add 32k back */
3945 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3947 n->quota_violation_count--;
3950 GNUNET_STATISTICS_update (stats,
3951 gettext_noop ("# payload received from other peers"),
3954 /* transmit message to all clients */
3955 uint32_t ats_count = 2;
3956 size_t size = sizeof (struct InboundMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information) + msize;
3957 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
3960 im = GNUNET_malloc (size);
3961 im->header.size = htons (size);
3962 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
3964 im->ats_count = htonl(ats_count);
3965 /* Setting ATS data */
3966 (&(im->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
3967 (&(im->ats))[0].value = htonl (n->distance);
3968 (&(im->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
3969 (&(im->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
3970 (&(im->ats))[ats_count].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
3971 (&(im->ats))[ats_count].value = htonl (0);
3973 memcpy (&((&(im->ats))[ats_count+1]), message, msize);
3975 while (cpos != NULL)
3977 transmit_to_client (cpos, &im->header, GNUNET_YES);
3985 * Iterator over hash map entries. Checks if the given validation
3986 * entry is for the same challenge as what is given in the PONG.
3988 * @param cls the 'struct TransportPongMessage*'
3989 * @param key peer identity
3990 * @param value value in the hash map ('struct ValidationEntry')
3991 * @return GNUNET_YES if we should continue to
3992 * iterate (mismatch), GNUNET_NO if not (entry matched)
3995 check_pending_validation (void *cls,
3996 const GNUNET_HashCode * key,
3999 const struct TransportPongMessage *pong = cls;
4000 struct ValidationEntry *ve = value;
4001 struct AddValidatedAddressContext avac;
4002 unsigned int challenge = ntohl(pong->challenge);
4003 struct GNUNET_HELLO_Message *hello;
4004 struct GNUNET_PeerIdentity target;
4005 struct NeighbourList *n;
4006 struct ForeignAddressList *fal;
4007 struct OwnAddressList *oal;
4008 struct TransportPlugin *tp;
4009 struct GNUNET_MessageHeader *prem;
4015 ps = ntohs (pong->header.size);
4016 if (ps < sizeof (struct TransportPongMessage))
4018 GNUNET_break_op (0);
4021 addr = (const char*) &pong[1];
4022 slen = strlen (ve->transport_name) + 1;
4023 if ( (ps - sizeof (struct TransportPongMessage) < slen) ||
4024 (ve->challenge != challenge) ||
4025 (addr[slen-1] != '\0') ||
4026 (0 != strcmp (addr, ve->transport_name)) ||
4027 (ntohl (pong->purpose.size)
4028 != sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
4030 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
4031 sizeof (struct GNUNET_PeerIdentity) + ps - sizeof (struct TransportPongMessage)) )
4036 alen = ps - sizeof (struct TransportPongMessage) - slen;
4037 switch (ntohl (pong->purpose.purpose))
4039 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN:
4040 if ( (ve->addrlen + slen != ntohl (pong->addrlen)) ||
4041 (0 != memcmp (&addr[slen],
4045 return GNUNET_YES; /* different entry, keep trying! */
4047 if (0 != memcmp (&pong->pid,
4049 sizeof (struct GNUNET_PeerIdentity)))
4051 GNUNET_break_op (0);
4055 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN,
4060 GNUNET_break_op (0);
4065 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4066 "Confirmed validity of address, peer `%4s' has address `%s' (%s).\n",
4068 a2s (ve->transport_name,
4069 (const struct sockaddr *) ve->addr,
4071 ve->transport_name);
4074 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING:
4075 if (0 != memcmp (&pong->pid,
4077 sizeof (struct GNUNET_PeerIdentity)))
4080 GNUNET_asprintf(&peer, "%s",GNUNET_i2s (&pong->pid));
4081 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4082 "Received PONG for different identity: I am `%s', PONG identity: `%s'\n",GNUNET_i2s (&my_identity), peer );
4086 if (ve->addrlen != 0)
4088 /* must have been for a different validation entry */
4091 tp = find_transport (ve->transport_name);
4097 oal = tp->addresses;
4100 if ( (oal->addrlen == alen) &&
4101 (0 == memcmp (&oal[1],
4109 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4110 _("Not accepting PONG with address `%s' since I cannot confirm having this address.\n"),
4111 a2s (ve->transport_name,
4117 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING,
4122 GNUNET_break_op (0);
4127 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4128 "Confirmed that peer `%4s' is talking to us using address `%s' (%s) for us.\n",
4130 a2s (ve->transport_name,
4133 ve->transport_name);
4137 GNUNET_break_op (0);
4140 if (GNUNET_TIME_absolute_get_remaining (GNUNET_TIME_absolute_ntoh (pong->expiration)).rel_value == 0)
4142 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4143 _("Received expired signature. Check system time.\n"));
4146 GNUNET_STATISTICS_update (stats,
4147 gettext_noop ("# address validation successes"),
4150 /* create the updated HELLO */
4151 GNUNET_CRYPTO_hash (&ve->publicKey,
4152 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4153 &target.hashPubKey);
4154 if (ve->addr != NULL)
4156 avac.done = GNUNET_NO;
4158 hello = GNUNET_HELLO_create (&ve->publicKey,
4159 &add_validated_address,
4161 GNUNET_PEERINFO_add_peer (peerinfo,
4163 GNUNET_free (hello);
4165 n = find_neighbour (&target);
4168 n->publicKey = ve->publicKey;
4169 n->public_key_valid = GNUNET_YES;
4170 fal = add_peer_address (n,
4175 GNUNET_assert (fal != NULL);
4176 fal->expires = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
4177 fal->validated = GNUNET_YES;
4178 mark_address_connected (fal);
4179 GNUNET_STATISTICS_update (stats,
4180 gettext_noop ("# peer addresses considered valid"),
4183 fal->latency = GNUNET_TIME_absolute_get_duration (ve->send_time);
4184 update_addr_value (fal, GNUNET_TIME_absolute_get_duration (ve->send_time).rel_value, GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4186 schedule_next_ping (fal);
4187 if (n->latency.rel_value == GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
4188 n->latency = fal->latency;
4190 n->latency.rel_value = (fal->latency.rel_value + n->latency.rel_value) / 2;
4192 n->distance = fal->distance;
4193 if (GNUNET_NO == n->received_pong)
4195 n->received_pong = GNUNET_YES;
4197 notify_clients_connect (&target, n->latency, n->distance);
4198 if (NULL != (prem = n->pre_connect_message_buffer))
4200 n->pre_connect_message_buffer = NULL;
4201 handle_payload_message (prem, n);
4205 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4207 GNUNET_SCHEDULER_cancel (n->retry_task);
4208 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4209 try_transmission_to_peer (n);
4213 /* clean up validation entry */
4214 GNUNET_assert (GNUNET_YES ==
4215 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4218 abort_validation (NULL, NULL, ve);
4224 * Function that will be called if we receive a validation
4225 * of an address challenge that we transmitted to another
4226 * peer. Note that the validation should only be considered
4227 * acceptable if the challenge matches AND if the sender
4228 * address is at least a plausible address for this peer
4229 * (otherwise we may be seeing a MiM attack).
4231 * @param cls closure
4232 * @param message the pong message
4233 * @param peer who responded to our challenge
4234 * @param sender_address string describing our sender address (as observed
4235 * by the other peer in binary format)
4236 * @param sender_address_len number of bytes in 'sender_address'
4239 handle_pong (void *cls, const struct GNUNET_MessageHeader *message,
4240 const struct GNUNET_PeerIdentity *peer,
4241 const char *sender_address,
4242 size_t sender_address_len)
4244 #if DEBUG_TRANSPORT > 1
4245 /* we get tons of these that just get discarded, only log
4246 if we are quite verbose */
4247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4248 "Receiving `%s' message from `%4s'.\n", "PONG",
4251 GNUNET_STATISTICS_update (stats,
4252 gettext_noop ("# PONG messages received"),
4255 if (GNUNET_SYSERR !=
4256 GNUNET_CONTAINER_multihashmap_get_multiple (validation_map,
4258 &check_pending_validation,
4261 /* This is *expected* to happen a lot since we send
4262 PONGs to *all* known addresses of the sender of
4263 the PING, so most likely we get multiple PONGs
4264 per PING, and all but the first PONG will end up
4265 here. So really we should not print anything here
4266 unless we want to be very, very verbose... */
4267 #if DEBUG_TRANSPORT > 2
4268 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4269 "Received `%s' message from `%4s' but have no record of a matching `%s' message. Ignoring.\n",
4281 * Try to validate a neighbour's address by sending him our HELLO and a PING.
4283 * @param cls the 'struct ValidationEntry*'
4284 * @param neighbour neighbour to validate, NULL if validation failed
4287 transmit_hello_and_ping (void *cls,
4288 struct NeighbourList *neighbour)
4290 struct ValidationEntry *va = cls;
4291 struct ForeignAddressList *peer_address;
4292 struct TransportPingMessage ping;
4293 uint16_t hello_size;
4296 struct GNUNET_PeerIdentity id;
4299 GNUNET_CRYPTO_hash (&va->publicKey,
4300 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4302 if (neighbour == NULL)
4304 /* FIXME: stats... */
4305 GNUNET_break (GNUNET_OK ==
4306 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4309 abort_validation (NULL, NULL, va);
4312 neighbour->publicKey = va->publicKey;
4313 neighbour->public_key_valid = GNUNET_YES;
4314 peer_address = add_peer_address (neighbour,
4315 va->transport_name, NULL,
4316 (const void*) &va[1],
4318 if (peer_address == NULL)
4320 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4321 "Failed to add peer `%4s' for plugin `%s'\n",
4322 GNUNET_i2s (&neighbour->id),
4323 va->transport_name);
4324 GNUNET_break (GNUNET_OK ==
4325 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4328 abort_validation (NULL, NULL, va);
4331 hello_size = GNUNET_HELLO_size(our_hello);
4332 slen = strlen(va->transport_name) + 1;
4333 tsize = sizeof(struct TransportPingMessage) + hello_size + va->addrlen + slen;
4334 message_buf = GNUNET_malloc(tsize);
4335 ping.challenge = htonl(va->challenge);
4336 ping.header.size = htons(sizeof(struct TransportPingMessage) + slen + va->addrlen);
4337 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
4338 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
4339 memcpy(message_buf, our_hello, hello_size);
4340 memcpy(&message_buf[hello_size],
4342 sizeof(struct TransportPingMessage));
4343 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
4346 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
4350 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4351 "Performing validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s' (%u bytes)\n",
4354 : a2s (va->transport_name,
4355 (const void*) &va[1], va->addrlen),
4357 GNUNET_i2s (&neighbour->id),
4358 "HELLO", hello_size,
4359 "PING", sizeof (struct TransportPingMessage) + va->addrlen + slen);
4362 GNUNET_STATISTICS_update (stats,
4363 gettext_noop ("# PING messages sent for initial validation"),
4366 transmit_to_peer (NULL, peer_address,
4367 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
4368 HELLO_VERIFICATION_TIMEOUT,
4370 GNUNET_YES, neighbour);
4371 GNUNET_free(message_buf);
4376 * Check if the given address is already being validated; if not,
4377 * append the given address to the list of entries that are being be
4378 * validated and initiate validation.
4380 * @param cls closure ('struct CheckHelloValidatedContext *')
4381 * @param tname name of the transport
4382 * @param expiration expiration time
4383 * @param addr the address
4384 * @param addrlen length of the address
4385 * @return GNUNET_OK (always)
4388 run_validation (void *cls,
4390 struct GNUNET_TIME_Absolute expiration,
4394 struct CheckHelloValidatedContext *chvc = cls;
4395 struct GNUNET_PeerIdentity id;
4396 struct TransportPlugin *tp;
4397 struct ValidationEntry *va;
4398 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4399 struct CheckAddressExistsClosure caec;
4400 struct OwnAddressList *oal;
4402 GNUNET_assert (addr != NULL);
4404 GNUNET_STATISTICS_update (stats,
4405 gettext_noop ("# peer addresses scheduled for validation"),
4408 tp = find_transport (tname);
4411 GNUNET_log (GNUNET_ERROR_TYPE_INFO |
4412 GNUNET_ERROR_TYPE_BULK,
4414 ("Transport `%s' not loaded, will not try to validate peer address using this transport.\n"),
4416 GNUNET_STATISTICS_update (stats,
4417 gettext_noop ("# peer addresses not validated (plugin not available)"),
4422 /* check if this is one of our own addresses */
4423 oal = tp->addresses;
4426 if ( (oal->addrlen == addrlen) &&
4427 (0 == memcmp (&oal[1],
4431 /* not plausible, this address is equivalent to our own address! */
4432 GNUNET_STATISTICS_update (stats,
4433 gettext_noop ("# peer addresses not validated (loopback)"),
4440 GNUNET_HELLO_get_key (chvc->hello, &pk);
4441 GNUNET_CRYPTO_hash (&pk,
4443 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4446 if (is_blacklisted(&id, tp))
4449 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4450 "Attempted to validate blacklisted peer `%s' using `%s'!\n",
4458 caec.addrlen = addrlen;
4459 caec.session = NULL;
4461 caec.exists = GNUNET_NO;
4462 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
4463 &check_address_exists,
4465 if (caec.exists == GNUNET_YES)
4467 /* During validation attempts we will likely trigger the other
4468 peer trying to validate our address which in turn will cause
4469 it to send us its HELLO, so we expect to hit this case rather
4470 frequently. Only print something if we are very verbose. */
4471 #if DEBUG_TRANSPORT > 1
4472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4473 "Validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
4474 a2s (tname, addr, addrlen),
4478 GNUNET_STATISTICS_update (stats,
4479 gettext_noop ("# peer addresses not validated (in progress)"),
4484 va = GNUNET_malloc (sizeof (struct ValidationEntry) + addrlen);
4487 va->transport_name = GNUNET_strdup (tname);
4488 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
4490 va->send_time = GNUNET_TIME_absolute_get();
4491 va->addr = (const void*) &va[1];
4492 memcpy (&va[1], addr, addrlen);
4493 va->addrlen = addrlen;
4494 GNUNET_HELLO_get_key (chvc->hello,
4496 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
4497 &timeout_hello_validation,
4499 GNUNET_CONTAINER_multihashmap_put (validation_map,
4502 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4503 setup_peer_check_blacklist (&id, GNUNET_NO,
4504 &transmit_hello_and_ping,
4511 * Check if addresses in validated hello "h" overlap with
4512 * those in "chvc->hello" and validate the rest.
4514 * @param cls closure
4515 * @param peer id of the peer, NULL for last call
4516 * @param h hello message for the peer (can be NULL)
4517 * @param err_msg NULL if successful, otherwise contains error message
4520 check_hello_validated (void *cls,
4521 const struct GNUNET_PeerIdentity *peer,
4522 const struct GNUNET_HELLO_Message *h,
4523 const char *err_msg)
4525 struct CheckHelloValidatedContext *chvc = cls;
4526 struct GNUNET_HELLO_Message *plain_hello;
4527 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4528 struct GNUNET_PeerIdentity target;
4529 struct NeighbourList *n;
4531 if (err_msg != NULL)
4533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4534 _("Error in communication with PEERINFO service\n"));
4540 GNUNET_STATISTICS_update (stats,
4541 gettext_noop ("# outstanding peerinfo iterate requests"),
4545 if (GNUNET_NO == chvc->hello_known)
4547 /* notify PEERINFO about the peer now, so that we at least
4548 have the public key if some other component needs it */
4549 GNUNET_HELLO_get_key (chvc->hello, &pk);
4550 GNUNET_CRYPTO_hash (&pk,
4551 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4552 &target.hashPubKey);
4553 plain_hello = GNUNET_HELLO_create (&pk,
4556 GNUNET_PEERINFO_add_peer (peerinfo, plain_hello);
4557 GNUNET_free (plain_hello);
4558 #if DEBUG_TRANSPORT_HELLO
4559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4560 "PEERINFO had no `%s' message for peer `%4s', full validation needed.\n",
4562 GNUNET_i2s (&target));
4564 GNUNET_STATISTICS_update (stats,
4565 gettext_noop ("# new HELLOs requiring full validation"),
4568 GNUNET_HELLO_iterate_addresses (chvc->hello,
4575 GNUNET_STATISTICS_update (stats,
4576 gettext_noop ("# duplicate HELLO (peer known)"),
4581 if (chvc->ve_count == 0)
4583 GNUNET_CONTAINER_DLL_remove (chvc_head,
4592 #if DEBUG_TRANSPORT_HELLO
4593 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4594 "PEERINFO had `%s' message for peer `%4s', validating only new addresses.\n",
4598 chvc->hello_known = GNUNET_YES;
4599 n = find_neighbour (peer);
4602 #if DEBUG_TRANSPORT_HELLO
4603 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4604 "Calling hello_iterate_addresses for %s!\n",
4607 GNUNET_HELLO_iterate_addresses (h,
4609 &add_to_foreign_address_list,
4611 try_transmission_to_peer (n);
4615 #if DEBUG_TRANSPORT_HELLO
4616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4617 "No existing neighbor record for %s!\n",
4620 GNUNET_STATISTICS_update (stats,
4621 gettext_noop ("# no existing neighbour record (validating HELLO)"),
4625 GNUNET_STATISTICS_update (stats,
4626 gettext_noop ("# HELLO validations (update case)"),
4629 GNUNET_HELLO_iterate_new_addresses (chvc->hello,
4631 GNUNET_TIME_relative_to_absolute (HELLO_REVALIDATION_START_TIME),
4638 * Process HELLO-message.
4640 * @param plugin transport involved, may be NULL
4641 * @param message the actual message
4642 * @return GNUNET_OK if the HELLO was well-formed, GNUNET_SYSERR otherwise
4645 process_hello (struct TransportPlugin *plugin,
4646 const struct GNUNET_MessageHeader *message)
4649 struct GNUNET_PeerIdentity target;
4650 const struct GNUNET_HELLO_Message *hello;
4651 struct CheckHelloValidatedContext *chvc;
4652 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
4653 #if DEBUG_TRANSPORT_HELLO > 2
4656 hsize = ntohs (message->size);
4657 if ((ntohs (message->type) != GNUNET_MESSAGE_TYPE_HELLO) ||
4658 (hsize < sizeof (struct GNUNET_MessageHeader)))
4661 return GNUNET_SYSERR;
4663 GNUNET_STATISTICS_update (stats,
4664 gettext_noop ("# HELLOs received for validation"),
4668 /* first, check if load is too high */
4669 if (GNUNET_SCHEDULER_get_load (GNUNET_SCHEDULER_PRIORITY_BACKGROUND) > MAX_HELLO_LOAD)
4671 GNUNET_STATISTICS_update (stats,
4672 gettext_noop ("# HELLOs ignored due to high load"),
4675 #if DEBUG_TRANSPORT_HELLO
4676 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4677 "Ignoring `%s' for `%4s', load too high.\n",
4679 GNUNET_i2s (&target));
4683 hello = (const struct GNUNET_HELLO_Message *) message;
4684 if (GNUNET_OK != GNUNET_HELLO_get_key (hello, &publicKey))
4686 #if DEBUG_TRANSPORT_HELLO
4687 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4688 "Unable to get public key from `%s' for `%4s'!\n",
4690 GNUNET_i2s (&target));
4692 GNUNET_break_op (0);
4693 return GNUNET_SYSERR;
4696 GNUNET_CRYPTO_hash (&publicKey,
4697 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4698 &target.hashPubKey);
4700 #if DEBUG_TRANSPORT_HELLO
4701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4702 "Received `%s' message for `%4s'\n",
4704 GNUNET_i2s (&target));
4707 if (0 == memcmp (&my_identity,
4709 sizeof (struct GNUNET_PeerIdentity)))
4711 GNUNET_STATISTICS_update (stats,
4712 gettext_noop ("# HELLOs ignored for validation (is my own HELLO)"),
4718 while (NULL != chvc)
4720 if (GNUNET_HELLO_equals (hello,
4722 GNUNET_TIME_absolute_get ()).abs_value > 0)
4724 #if DEBUG_TRANSPORT_HELLO > 2
4725 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4726 "Received duplicate `%s' message for `%4s'; ignored\n",
4728 GNUNET_i2s (&target));
4730 return GNUNET_OK; /* validation already pending */
4732 if (GNUNET_HELLO_size(hello) == GNUNET_HELLO_size (chvc->hello))
4733 GNUNET_break (0 != memcmp (hello, chvc->hello,
4734 GNUNET_HELLO_size(hello)));
4739 struct NeighbourList *temp_neighbor = find_neighbour(&target);
4740 if ((NULL != temp_neighbor))
4742 fprintf(stderr, "Already know peer, ignoring hello\n");
4747 #if DEBUG_TRANSPORT_HELLO > 2
4750 my_id = GNUNET_strdup(GNUNET_i2s(plugin->env.my_identity));
4751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4752 "%s: Starting validation of `%s' message for `%4s' via '%s' of size %u\n",
4755 GNUNET_i2s (&target),
4757 GNUNET_HELLO_size(hello));
4761 chvc = GNUNET_malloc (sizeof (struct CheckHelloValidatedContext) + hsize);
4763 chvc->hello = (const struct GNUNET_HELLO_Message *) &chvc[1];
4764 memcpy (&chvc[1], hello, hsize);
4765 GNUNET_CONTAINER_DLL_insert (chvc_head,
4768 /* finally, check if HELLO was previously validated
4769 (continuation will then schedule actual validation) */
4770 GNUNET_STATISTICS_update (stats,
4771 gettext_noop ("# peerinfo process hello iterate requests"),
4774 GNUNET_STATISTICS_update (stats,
4775 gettext_noop ("# outstanding peerinfo iterate requests"),
4778 chvc->piter = GNUNET_PEERINFO_iterate (peerinfo,
4780 HELLO_VERIFICATION_TIMEOUT,
4781 &check_hello_validated, chvc);
4787 * The peer specified by the given neighbour has timed-out or a plugin
4788 * has disconnected. We may either need to do nothing (other plugins
4789 * still up), or trigger a full disconnect and clean up. This
4790 * function updates our state and does the necessary notifications.
4791 * Also notifies our clients that the neighbour is now officially
4794 * @param n the neighbour list entry for the peer
4795 * @param check GNUNET_YES to check if ALL addresses for this peer
4796 * are gone, GNUNET_NO to force a disconnect of the peer
4797 * regardless of whether other addresses exist.
4800 disconnect_neighbour (struct NeighbourList *n, int check)
4802 struct ReadyList *rpos;
4803 struct NeighbourList *npos;
4804 struct NeighbourList *nprev;
4805 struct MessageQueue *mq;
4806 struct ForeignAddressList *peer_addresses;
4807 struct ForeignAddressList *peer_pos;
4809 if (GNUNET_YES == check)
4812 while (NULL != rpos)
4814 peer_addresses = rpos->addresses;
4815 while (peer_addresses != NULL)
4817 if (GNUNET_YES == peer_addresses->connected)
4819 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4820 "NOT Disconnecting from `%4s', still have live addresses!\n",
4821 GNUNET_i2s (&n->id));
4822 return; /* still connected */
4824 peer_addresses = peer_addresses->next;
4830 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4831 "Disconnecting from `%4s'\n",
4832 GNUNET_i2s (&n->id));
4834 /* remove n from neighbours list */
4837 while ((npos != NULL) && (npos != n))
4842 GNUNET_assert (npos != NULL);
4844 neighbours = n->next;
4846 nprev->next = n->next;
4848 /* notify all clients about disconnect */
4849 if (GNUNET_YES == n->received_pong)
4850 notify_clients_disconnect (&n->id);
4852 /* clean up all plugins, cancel connections and pending transmissions */
4853 while (NULL != (rpos = n->plugins))
4855 n->plugins = rpos->next;
4856 rpos->plugin->api->disconnect (rpos->plugin->api->cls, &n->id);
4857 while (rpos->addresses != NULL)
4859 peer_pos = rpos->addresses;
4860 rpos->addresses = peer_pos->next;
4861 if (peer_pos->connected == GNUNET_YES)
4862 GNUNET_STATISTICS_update (stats,
4863 gettext_noop ("# connected addresses"),
4866 if (GNUNET_YES == peer_pos->validated)
4867 GNUNET_STATISTICS_update (stats,
4868 gettext_noop ("# peer addresses considered valid"),
4871 if (GNUNET_SCHEDULER_NO_TASK != peer_pos->revalidate_task)
4873 GNUNET_SCHEDULER_cancel (peer_pos->revalidate_task);
4874 peer_pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
4876 GNUNET_free(peer_pos->ressources);
4877 peer_pos->ressources = NULL;
4878 GNUNET_free(peer_pos->quality);
4879 peer_pos->ressources = NULL;
4880 GNUNET_free(peer_pos);
4881 ats->stat.recreate_problem = GNUNET_YES;
4886 /* free all messages on the queue */
4887 while (NULL != (mq = n->messages_head))
4889 GNUNET_STATISTICS_update (stats,
4890 gettext_noop ("# bytes in message queue for other peers"),
4891 - (int64_t) mq->message_buf_size,
4893 GNUNET_STATISTICS_update (stats,
4894 gettext_noop ("# bytes discarded due to disconnect"),
4895 mq->message_buf_size,
4897 GNUNET_CONTAINER_DLL_remove (n->messages_head,
4900 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
4902 sizeof(struct GNUNET_PeerIdentity)));
4905 if (n->timeout_task != GNUNET_SCHEDULER_NO_TASK)
4907 GNUNET_SCHEDULER_cancel (n->timeout_task);
4908 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4910 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4912 GNUNET_SCHEDULER_cancel (n->retry_task);
4913 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4915 if (n->piter != NULL)
4917 GNUNET_PEERINFO_iterate_cancel (n->piter);
4918 GNUNET_STATISTICS_update (stats,
4919 gettext_noop ("# outstanding peerinfo iterate requests"),
4924 /* finally, free n itself */
4925 GNUNET_STATISTICS_update (stats,
4926 gettext_noop ("# active neighbours"),
4929 GNUNET_free_non_null (n->pre_connect_message_buffer);
4935 * We have received a PING message from someone. Need to send a PONG message
4936 * in response to the peer by any means necessary.
4939 handle_ping(void *cls, const struct GNUNET_MessageHeader *message,
4940 const struct GNUNET_PeerIdentity *peer,
4941 struct Session *session,
4942 const char *sender_address,
4943 uint16_t sender_address_len)
4945 struct TransportPlugin *plugin = cls;
4946 struct SessionHeader *session_header = (struct SessionHeader*) session;
4947 struct TransportPingMessage *ping;
4948 struct TransportPongMessage *pong;
4949 struct NeighbourList *n;
4950 struct ReadyList *rl;
4951 struct ForeignAddressList *fal;
4952 struct OwnAddressList *oal;
4957 if (ntohs (message->size) < sizeof (struct TransportPingMessage))
4959 GNUNET_break_op (0);
4960 return GNUNET_SYSERR;
4963 ping = (struct TransportPingMessage *) message;
4964 if (0 != memcmp (&ping->target,
4965 plugin->env.my_identity,
4966 sizeof (struct GNUNET_PeerIdentity)))
4968 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4969 _("Received `%s' message from `%s' destined for `%s' which is not me!\n"),
4971 (sender_address != NULL)
4972 ? a2s (plugin->short_name,
4973 (const struct sockaddr *)sender_address,
4976 GNUNET_i2s (&ping->target));
4977 return GNUNET_SYSERR;
4980 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4981 "Processing `%s' from `%s'\n",
4983 (sender_address != NULL)
4984 ? a2s (plugin->short_name,
4985 (const struct sockaddr *)sender_address,
4989 GNUNET_STATISTICS_update (stats,
4990 gettext_noop ("# PING messages received"),
4993 addr = (const char*) &ping[1];
4994 alen = ntohs (message->size) - sizeof (struct TransportPingMessage);
4995 slen = strlen (plugin->short_name) + 1;
4998 /* peer wants to confirm that we have an outbound connection to him */
4999 if (session == NULL)
5001 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5002 _("Refusing to create PONG since I do not have a session with `%s'.\n"),
5004 return GNUNET_SYSERR;
5006 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5007 pong->header.size = htons (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5008 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5009 pong->purpose.size =
5010 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5012 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5013 sizeof (struct GNUNET_PeerIdentity) + sender_address_len + slen);
5014 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING);
5015 pong->challenge = ping->challenge;
5016 pong->addrlen = htonl(sender_address_len + slen);
5019 sizeof(struct GNUNET_PeerIdentity));
5023 if ((sender_address!=NULL) && (sender_address_len > 0))
5024 memcpy (&((char*)&pong[1])[slen],
5026 sender_address_len);
5027 if (GNUNET_TIME_absolute_get_remaining (session_header->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4)
5029 /* create / update cached sig */
5031 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5032 "Creating PONG signature to indicate active connection.\n");
5034 session_header->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5035 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5036 GNUNET_assert (GNUNET_OK ==
5037 GNUNET_CRYPTO_rsa_sign (my_private_key,
5039 &session_header->pong_signature));
5043 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5045 memcpy (&pong->signature,
5046 &session_header->pong_signature,
5047 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5053 /* peer wants to confirm that this is one of our addresses */
5057 plugin->api->check_address (plugin->api->cls,
5061 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5062 _("Not confirming PING with address `%s' since I cannot confirm having this address.\n"),
5063 a2s (plugin->short_name,
5068 oal = plugin->addresses;
5071 if ( (oal->addrlen == alen) &&
5078 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + alen + slen);
5079 pong->header.size = htons (sizeof (struct TransportPongMessage) + alen + slen);
5080 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5081 pong->purpose.size =
5082 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5084 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5085 sizeof (struct GNUNET_PeerIdentity) + alen + slen);
5086 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN);
5087 pong->challenge = ping->challenge;
5088 pong->addrlen = htonl(alen + slen);
5091 sizeof(struct GNUNET_PeerIdentity));
5092 memcpy (&pong[1], plugin->short_name, slen);
5093 memcpy (&((char*)&pong[1])[slen], addr, alen);
5094 if ( (oal != NULL) &&
5095 (GNUNET_TIME_absolute_get_remaining (oal->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4) )
5097 /* create / update cached sig */
5099 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5100 "Creating PONG signature to indicate ownership.\n");
5102 oal->pong_sig_expires = GNUNET_TIME_absolute_min (oal->expires,
5103 GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5104 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5105 GNUNET_assert (GNUNET_OK ==
5106 GNUNET_CRYPTO_rsa_sign (my_private_key,
5108 &oal->pong_signature));
5109 memcpy (&pong->signature,
5110 &oal->pong_signature,
5111 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5113 else if (oal == NULL)
5115 /* not using cache (typically DV-only) */
5116 pong->expiration = GNUNET_TIME_absolute_hton (GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5117 GNUNET_assert (GNUNET_OK ==
5118 GNUNET_CRYPTO_rsa_sign (my_private_key,
5124 /* can used cached version */
5125 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5126 memcpy (&pong->signature,
5127 &oal->pong_signature,
5128 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5131 n = find_neighbour(peer);
5132 GNUNET_assert (n != NULL);
5133 /* first try reliable response transmission */
5137 fal = rl->addresses;
5140 if (-1 != rl->plugin->api->send (rl->plugin->api->cls,
5143 ntohs (pong->header.size),
5144 TRANSPORT_PONG_PRIORITY,
5145 HELLO_VERIFICATION_TIMEOUT,
5153 GNUNET_STATISTICS_update (stats,
5154 gettext_noop ("# PONGs unicast via reliable transport"),
5164 /* no reliable method found, do multicast */
5165 GNUNET_STATISTICS_update (stats,
5166 gettext_noop ("# PONGs multicast to all available addresses"),
5172 fal = rl->addresses;
5175 transmit_to_peer(NULL, fal,
5176 TRANSPORT_PONG_PRIORITY,
5177 HELLO_VERIFICATION_TIMEOUT,
5179 ntohs(pong->header.size),
5195 * Function called by the plugin for each received message.
5196 * Update data volumes, possibly notify plugins about
5197 * reducing the rate at which they read from the socket
5198 * and generally forward to our receive callback.
5200 * @param cls the "struct TransportPlugin *" we gave to the plugin
5201 * @param peer (claimed) identity of the other peer
5202 * @param message the message, NULL if we only care about
5203 * learning about the delay until we should receive again
5204 * @param ats_data information for automatic transport selection
5205 * @param ats_count number of elements in ats not including 0-terminator
5206 * @param session identifier used for this session (can be NULL)
5207 * @param sender_address binary address of the sender (if observed)
5208 * @param sender_address_len number of bytes in sender_address
5209 * @return how long in ms the plugin should wait until receiving more data
5210 * (plugins that do not support this, can ignore the return value)
5212 static struct GNUNET_TIME_Relative
5213 plugin_env_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
5214 const struct GNUNET_MessageHeader *message,
5215 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
5217 struct Session *session,
5218 const char *sender_address,
5219 uint16_t sender_address_len)
5221 struct TransportPlugin *plugin = cls;
5222 struct ReadyList *service_context;
5223 struct ForeignAddressList *peer_address;
5225 struct NeighbourList *n;
5226 struct GNUNET_TIME_Relative ret;
5227 if (is_blacklisted (peer, plugin))
5228 return GNUNET_TIME_UNIT_FOREVER_REL;
5232 n = find_neighbour (peer);
5234 n = setup_new_neighbour (peer, GNUNET_YES);
5235 service_context = n->plugins;
5236 while ((service_context != NULL) && (plugin != service_context->plugin))
5237 service_context = service_context->next;
5238 GNUNET_assert ((plugin->api->send == NULL) || (service_context != NULL));
5239 peer_address = NULL;
5242 for (c=0; c<ats_count; c++)
5244 if (ntohl(ats_data[c].type) == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
5246 distance = ntohl(ats_data[c].value);
5250 /* notify ATS about incoming data */
5251 //ats_notify_ats_data(peer, ats_data);
5254 if (message != NULL)
5256 if ( (session != NULL) ||
5257 (sender_address != NULL) )
5258 peer_address = add_peer_address (n,
5262 sender_address_len);
5263 if (peer_address != NULL)
5266 update_addr_ats(peer_address, ats_data, ats_count);
5267 update_addr_value(peer_address, distance, GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5269 peer_address->distance = distance;
5270 if (GNUNET_YES == peer_address->validated)
5271 mark_address_connected (peer_address);
5272 peer_address->timeout
5274 GNUNET_TIME_relative_to_absolute
5275 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5276 schedule_next_ping (peer_address);
5278 /* update traffic received amount ... */
5279 msize = ntohs (message->size);
5281 GNUNET_STATISTICS_update (stats,
5282 gettext_noop ("# bytes received from other peers"),
5285 n->distance = distance;
5287 GNUNET_TIME_relative_to_absolute
5288 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5289 GNUNET_SCHEDULER_cancel (n->timeout_task);
5291 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
5292 &neighbour_timeout_task, n);
5293 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
5295 /* dropping message due to frequent inbound volume violations! */
5296 GNUNET_log (GNUNET_ERROR_TYPE_WARNING |
5297 GNUNET_ERROR_TYPE_BULK,
5299 ("Dropping incoming message due to repeated bandwidth quota (%u b/s) violations (total of %u).\n"),
5300 n->in_tracker.available_bytes_per_s__,
5301 n->quota_violation_count);
5302 GNUNET_STATISTICS_update (stats,
5303 gettext_noop ("# bandwidth quota violations by other peers"),
5306 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
5308 if ((ntohs(message->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_ATS) &&
5309 (ntohs(message->size) == (sizeof (struct GNUNET_MessageHeader) + sizeof (uint32_t))))
5311 uint32_t value = ntohl(*((uint32_t *) &message[1]));
5312 //GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "GNUNET_MESSAGE_TYPE_TRANSPORT_ATS: %i \n", value);
5313 /* Force ressource and quality update */
5316 ats->stat.modified_resources = GNUNET_YES;
5317 ats->stat.modified_quality = GNUNET_YES;
5319 /* Force cost update */
5321 ats->stat.modified_resources = GNUNET_YES;
5322 /* Force quality update */
5324 ats->stat.modified_quality = GNUNET_YES;
5325 /* Force full rebuild */
5327 ats->stat.recreate_problem = GNUNET_YES;
5331 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5332 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
5333 ntohs (message->type),
5334 ntohs (message->size),
5337 switch (ntohs (message->type))
5339 case GNUNET_MESSAGE_TYPE_HELLO:
5340 GNUNET_STATISTICS_update (stats,
5341 gettext_noop ("# HELLO messages received from other peers"),
5344 process_hello (plugin, message);
5346 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
5347 handle_ping (plugin, message, peer, session, sender_address, sender_address_len);
5349 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
5350 handle_pong (plugin, message, peer, sender_address, sender_address_len);
5352 case GNUNET_MESSAGE_TYPE_TRANSPORT_ATS:
5355 handle_payload_message (message, n);
5359 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 0);
5360 if (ret.rel_value > 0)
5362 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5363 "Throttling read (%llu bytes excess at %u b/s), waiting %llums before reading more.\n",
5364 (unsigned long long) n->in_tracker.consumption_since_last_update__,
5365 (unsigned int) n->in_tracker.available_bytes_per_s__,
5366 (unsigned long long) ret.rel_value);
5367 GNUNET_STATISTICS_update (stats,
5368 gettext_noop ("# ms throttling suggested"),
5369 (int64_t) ret.rel_value,
5376 * Handle START-message. This is the first message sent to us
5377 * by any client which causes us to add it to our list.
5379 * @param cls closure (always NULL)
5380 * @param client identification of the client
5381 * @param message the actual message
5384 handle_start (void *cls,
5385 struct GNUNET_SERVER_Client *client,
5386 const struct GNUNET_MessageHeader *message)
5388 const struct StartMessage *start;
5389 struct TransportClient *c;
5390 struct ConnectInfoMessage * cim;
5391 struct NeighbourList *n;
5395 start = (const struct StartMessage*) message;
5397 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5398 "Received `%s' request from client\n", "START");
5403 if (c->client == client)
5405 /* client already on our list! */
5407 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5412 if ( (GNUNET_NO != ntohl (start->do_check)) &&
5413 (0 != memcmp (&start->self,
5415 sizeof (struct GNUNET_PeerIdentity))) )
5417 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5418 _("Rejecting control connection from peer `%s', which is not me!\n"),
5419 GNUNET_i2s (&start->self));
5420 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5423 c = GNUNET_malloc (sizeof (struct TransportClient));
5427 if (our_hello != NULL)
5430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5431 "Sending our own `%s' to new client\n", "HELLO");
5433 transmit_to_client (c,
5434 (const struct GNUNET_MessageHeader *) our_hello,
5436 /* tell new client about all existing connections */
5438 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
5439 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
5443 cim = GNUNET_malloc (size);
5444 cim->header.size = htons (size);
5445 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
5446 cim->ats_count = htonl(ats_count);
5447 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
5448 (&(cim->ats))[2].value = htonl (0);
5452 if (GNUNET_YES == n->received_pong)
5454 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5455 (&(cim->ats))[0].value = htonl (n->distance);
5456 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
5457 (&(cim->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
5459 transmit_to_client (c, &cim->header, GNUNET_NO);
5465 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5470 * Handle HELLO-message.
5472 * @param cls closure (always NULL)
5473 * @param client identification of the client
5474 * @param message the actual message
5477 handle_hello (void *cls,
5478 struct GNUNET_SERVER_Client *client,
5479 const struct GNUNET_MessageHeader *message)
5483 GNUNET_STATISTICS_update (stats,
5484 gettext_noop ("# HELLOs received from clients"),
5487 ret = process_hello (NULL, message);
5488 GNUNET_SERVER_receive_done (client, ret);
5493 * Closure for 'transmit_client_message'; followed by
5494 * 'msize' bytes of the actual message.
5496 struct TransmitClientMessageContext
5499 * Client on whom's behalf we are sending.
5501 struct GNUNET_SERVER_Client *client;
5504 * Timeout for the transmission.
5506 struct GNUNET_TIME_Absolute timeout;
5514 * Size of the message in bytes.
5521 * Schedule transmission of a message we got from a client to a peer.
5523 * @param cls the 'struct TransmitClientMessageContext*'
5524 * @param n destination, or NULL on error (in that case, drop the message)
5527 transmit_client_message (void *cls,
5528 struct NeighbourList *n)
5530 struct TransmitClientMessageContext *tcmc = cls;
5531 struct TransportClient *tc;
5534 while ((tc != NULL) && (tc->client != tcmc->client))
5539 transmit_to_peer (tc, NULL, tcmc->priority,
5540 GNUNET_TIME_absolute_get_remaining (tcmc->timeout),
5542 tcmc->msize, GNUNET_NO, n);
5544 GNUNET_SERVER_receive_done (tcmc->client, GNUNET_OK);
5545 GNUNET_SERVER_client_drop (tcmc->client);
5551 * Handle SEND-message.
5553 * @param cls closure (always NULL)
5554 * @param client identification of the client
5555 * @param message the actual message
5558 handle_send (void *cls,
5559 struct GNUNET_SERVER_Client *client,
5560 const struct GNUNET_MessageHeader *message)
5562 const struct OutboundMessage *obm;
5563 const struct GNUNET_MessageHeader *obmm;
5564 struct TransmitClientMessageContext *tcmc;
5568 size = ntohs (message->size);
5570 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
5573 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5576 GNUNET_STATISTICS_update (stats,
5577 gettext_noop ("# payload received for other peers"),
5580 obm = (const struct OutboundMessage *) message;
5581 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
5582 msize = size - sizeof (struct OutboundMessage);
5584 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5585 "Received `%s' request from client with target `%4s' and message of type %u and size %u\n",
5586 "SEND", GNUNET_i2s (&obm->peer),
5590 tcmc = GNUNET_malloc (sizeof (struct TransmitClientMessageContext) + msize);
5591 tcmc->client = client;
5592 tcmc->priority = ntohl (obm->priority);
5593 tcmc->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_ntoh (obm->timeout));
5594 tcmc->msize = msize;
5595 /* FIXME: this memcpy can be up to 7% of our total runtime */
5596 memcpy (&tcmc[1], obmm, msize);
5597 GNUNET_SERVER_client_keep (client);
5598 setup_peer_check_blacklist (&obm->peer, GNUNET_YES,
5599 &transmit_client_message,
5605 * Handle request connect message
5607 * @param cls closure (always NULL)
5608 * @param client identification of the client
5609 * @param message the actual message
5612 handle_request_connect (void *cls,
5613 struct GNUNET_SERVER_Client *client,
5614 const struct GNUNET_MessageHeader *message)
5616 const struct TransportRequestConnectMessage *trcm =
5617 (const struct TransportRequestConnectMessage *) message;
5619 GNUNET_STATISTICS_update (stats,
5620 gettext_noop ("# REQUEST CONNECT messages received"),
5623 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Received a request connect message for peer %s\n", GNUNET_i2s(&trcm->peer));
5624 setup_peer_check_blacklist (&trcm->peer, GNUNET_YES,
5626 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5630 * Handle SET_QUOTA-message.
5632 * @param cls closure (always NULL)
5633 * @param client identification of the client
5634 * @param message the actual message
5637 handle_set_quota (void *cls,
5638 struct GNUNET_SERVER_Client *client,
5639 const struct GNUNET_MessageHeader *message)
5641 const struct QuotaSetMessage *qsm =
5642 (const struct QuotaSetMessage *) message;
5643 struct NeighbourList *n;
5645 GNUNET_STATISTICS_update (stats,
5646 gettext_noop ("# SET QUOTA messages received"),
5649 n = find_neighbour (&qsm->peer);
5652 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5653 GNUNET_STATISTICS_update (stats,
5654 gettext_noop ("# SET QUOTA messages ignored (no such peer)"),
5660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5661 "Received `%s' request (new quota %u, old quota %u) from client for peer `%4s'\n",
5663 (unsigned int) ntohl (qsm->quota.value__),
5664 (unsigned int) n->in_tracker.available_bytes_per_s__,
5665 GNUNET_i2s (&qsm->peer));
5667 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker,
5669 if (0 == ntohl (qsm->quota.value__))
5671 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5672 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&n->id),
5674 disconnect_neighbour (n, GNUNET_NO);
5676 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5681 * Take the given address and append it to the set of results sent back to
5684 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
5685 * @param address the resolved name, NULL to indicate the last response
5688 transmit_address_to_client (void *cls, const char *address)
5690 struct GNUNET_SERVER_TransmitContext *tc = cls;
5693 if (NULL == address)
5696 slen = strlen (address) + 1;
5698 GNUNET_SERVER_transmit_context_append_data (tc, address, slen,
5699 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5700 if (NULL == address)
5701 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
5706 * Handle AddressLookup-message.
5708 * @param cls closure (always NULL)
5709 * @param client identification of the client
5710 * @param message the actual message
5713 handle_address_lookup (void *cls,
5714 struct GNUNET_SERVER_Client *client,
5715 const struct GNUNET_MessageHeader *message)
5717 const struct AddressLookupMessage *alum;
5718 struct TransportPlugin *lsPlugin;
5719 const char *nameTransport;
5720 const char *address;
5722 struct GNUNET_SERVER_TransmitContext *tc;
5723 struct GNUNET_TIME_Absolute timeout;
5724 struct GNUNET_TIME_Relative rtimeout;
5727 size = ntohs (message->size);
5728 if (size < sizeof (struct AddressLookupMessage))
5730 GNUNET_break_op (0);
5731 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5734 alum = (const struct AddressLookupMessage *) message;
5735 uint32_t addressLen = ntohl (alum->addrlen);
5736 if (size <= sizeof (struct AddressLookupMessage) + addressLen)
5738 GNUNET_break_op (0);
5739 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5742 address = (const char *) &alum[1];
5743 nameTransport = (const char *) &address[addressLen];
5745 [size - sizeof (struct AddressLookupMessage) - addressLen - 1] != '\0')
5747 GNUNET_break_op (0);
5748 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5751 timeout = GNUNET_TIME_absolute_ntoh (alum->timeout);
5752 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5753 numeric = ntohl (alum->numeric_only);
5754 lsPlugin = find_transport (nameTransport);
5755 if (NULL == lsPlugin)
5757 tc = GNUNET_SERVER_transmit_context_create (client);
5758 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5759 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5760 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
5763 tc = GNUNET_SERVER_transmit_context_create (client);
5764 lsPlugin->api->address_pretty_printer (lsPlugin->api->cls,
5766 address, addressLen,
5769 &transmit_address_to_client, tc);
5774 * Setup the environment for this plugin.
5777 create_environment (struct TransportPlugin *plug)
5779 plug->env.cfg = cfg;
5780 plug->env.my_identity = &my_identity;
5781 plug->env.our_hello = &our_hello;
5782 plug->env.cls = plug;
5783 plug->env.receive = &plugin_env_receive;
5784 plug->env.notify_address = &plugin_env_notify_address;
5785 plug->env.session_end = &plugin_env_session_end;
5786 plug->env.max_connections = max_connect_per_transport;
5787 plug->env.stats = stats;
5792 * Start the specified transport (load the plugin).
5795 start_transport (struct GNUNET_SERVER_Handle *server,
5798 struct TransportPlugin *plug;
5801 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5802 _("Loading `%s' transport plugin\n"), name);
5803 GNUNET_asprintf (&libname, "libgnunet_plugin_transport_%s", name);
5804 plug = GNUNET_malloc (sizeof (struct TransportPlugin));
5805 create_environment (plug);
5806 plug->short_name = GNUNET_strdup (name);
5807 plug->lib_name = libname;
5808 plug->next = plugins;
5810 plug->api = GNUNET_PLUGIN_load (libname, &plug->env);
5811 if (plug->api == NULL)
5813 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5814 _("Failed to load transport plugin for `%s'\n"), name);
5815 GNUNET_free (plug->short_name);
5816 plugins = plug->next;
5817 GNUNET_free (libname);
5824 * Called whenever a client is disconnected. Frees our
5825 * resources associated with that client.
5827 * @param cls closure
5828 * @param client identification of the client
5831 client_disconnect_notification (void *cls,
5832 struct GNUNET_SERVER_Client *client)
5834 struct TransportClient *pos;
5835 struct TransportClient *prev;
5836 struct ClientMessageQueueEntry *mqe;
5837 struct Blacklisters *bl;
5838 struct BlacklistCheck *bc;
5843 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
5844 "Client disconnected, cleaning up.\n");
5846 /* clean up blacklister */
5850 if (bl->client == client)
5855 if (bc->bl_pos == bl)
5857 bc->bl_pos = bl->next;
5860 GNUNET_CONNECTION_notify_transmit_ready_cancel (bc->th);
5863 if (bc->task == GNUNET_SCHEDULER_NO_TASK)
5864 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
5870 GNUNET_CONTAINER_DLL_remove (bl_head,
5873 GNUNET_SERVER_client_drop (bl->client);
5879 /* clean up 'normal' clients */
5882 while ((pos != NULL) && (pos->client != client))
5889 while (NULL != (mqe = pos->message_queue_head))
5891 GNUNET_CONTAINER_DLL_remove (pos->message_queue_head,
5892 pos->message_queue_tail,
5894 pos->message_count--;
5898 clients = pos->next;
5900 prev->next = pos->next;
5901 if (GNUNET_YES == pos->tcs_pending)
5906 if (pos->th != NULL)
5908 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
5911 GNUNET_break (0 == pos->message_count);
5917 * Function called when the service shuts down. Unloads our plugins
5918 * and cancels pending validations.
5920 * @param cls closure, unused
5921 * @param tc task context (unused)
5924 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5926 struct TransportPlugin *plug;
5927 struct OwnAddressList *al;
5928 struct CheckHelloValidatedContext *chvc;
5930 while (neighbours != NULL)
5932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5933 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&neighbours->id),
5935 disconnect_neighbour (neighbours, GNUNET_NO);
5938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5939 "Transport service is unloading plugins...\n");
5941 while (NULL != (plug = plugins))
5943 plugins = plug->next;
5944 if (plug->address_update_task != GNUNET_SCHEDULER_NO_TASK)
5946 GNUNET_SCHEDULER_cancel (plug->address_update_task);
5947 plug->address_update_task = GNUNET_SCHEDULER_NO_TASK;
5949 GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
5950 GNUNET_free (plug->lib_name);
5951 GNUNET_free (plug->short_name);
5952 while (NULL != (al = plug->addresses))
5954 plug->addresses = al->next;
5959 if (my_private_key != NULL)
5960 GNUNET_CRYPTO_rsa_key_free (my_private_key);
5961 GNUNET_free_non_null (our_hello);
5963 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
5966 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
5967 validation_map = NULL;
5971 /* free 'chvc' data structure */
5972 while (NULL != (chvc = chvc_head))
5974 chvc_head = chvc->next;
5975 if (chvc->piter != NULL)
5977 GNUNET_PEERINFO_iterate_cancel (chvc->piter);
5978 GNUNET_STATISTICS_update (stats,
5979 gettext_noop ("# outstanding peerinfo iterate requests"),
5985 GNUNET_assert (chvc->ve_count == 0);
5992 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
5995 if (peerinfo != NULL)
5997 GNUNET_PEERINFO_disconnect (peerinfo);
6000 /* Can we assume those are gone by now, or do we need to clean up
6002 GNUNET_break (bl_head == NULL);
6003 GNUNET_break (bc_head == NULL);
6007 static int ats_evaluate_results (int result, int solution, char * problem)
6009 int cont = GNUNET_NO;
6010 int error_kind = GNUNET_ERROR_TYPE_DEBUG;
6012 error_kind = GNUNET_ERROR_TYPE_ERROR;
6016 case GLP_ESTOP : /* search terminated by application */
6017 GNUNET_log (error_kind, "%s , Search terminated by application\n", problem);
6019 case GLP_EITLIM : /* iteration limit exceeded */
6020 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Iteration limit exceeded\n", problem);
6023 case GLP_ETMLIM : /* time limit exceeded */
6024 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Time limit exceeded\n", problem);
6026 case GLP_ENOPFS : /* no primal feasible solution */
6027 case GLP_ENODFS : /* no dual feasible solution */
6028 GNUNET_log (error_kind, "%s No feasible solution\n", problem);
6031 case GLP_EBADB : /* invalid basis */
6032 case GLP_ESING : /* singular matrix */
6033 case GLP_ECOND : /* ill-conditioned matrix */
6034 case GLP_EBOUND : /* invalid bounds */
6035 case GLP_EFAIL : /* solver failed */
6036 case GLP_EOBJLL : /* objective lower limit reached */
6037 case GLP_EOBJUL : /* objective upper limit reached */
6038 case GLP_EROOT : /* root LP optimum not provided */
6039 GNUNET_log (error_kind, "%s Invalid Input data: %i\n", problem, result);
6043 GNUNET_log (error_kind, "%s Problem has been solved\n", problem);
6049 GNUNET_log (error_kind, "%s solution is undefined\n", problem);
6052 GNUNET_log (error_kind, "%s solution is optimal\n", problem);
6056 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"));
6060 GNUNET_log (error_kind, "%s problem has no %sfeasible solution\n", problem, (0==strcmp(problem,"LP")?"":"integer "));
6063 GNUNET_log (error_kind, "%s problem is infeasible \n", problem);
6066 GNUNET_log (error_kind, "%s problem is unbounded \n", problem);
6073 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)
6082 glp_init_smcp(&opt_lp);
6084 opt_lp.msg_lev = GLP_MSG_ALL;
6086 opt_lp.msg_lev = GLP_MSG_OFF;
6089 // setting iteration limit
6090 opt_lp.it_lim = max_it;
6092 opt_lp.tm_lim = max_dur;
6094 if (ats->stat.recreate_problem == GNUNET_YES)
6095 opt_lp.presolve = GLP_ON;
6096 result = glp_simplex(ats->prob, &opt_lp);
6097 lp_solution = glp_get_status (ats->prob);
6099 if ((result == GLP_ETMLIM) || (result == GLP_ETMLIM))
6101 ats->stat.valid = GNUNET_NO;
6102 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ATS exceeded time or iteration limit!\n");
6106 if (ats_evaluate_results(result, lp_solution, "LP") == GNUNET_YES)
6108 stat->valid = GNUNET_YES;
6112 ats->stat.simplex_rerun_required = GNUNET_YES;
6113 opt_lp.presolve = GLP_ON;
6114 result = glp_simplex(ats->prob, &opt_lp);
6115 lp_solution = glp_get_status (ats->prob);
6117 // TODO: Remove if this does not appear until release
6118 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "EXECUTED SIMPLEX WITH PRESOLVER! %i \n", lp_solution);
6120 if (ats_evaluate_results(result, lp_solution, "LP") != GNUNET_YES)
6122 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "After execution simplex with presolver: STILL INVALID!\n");
6124 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);
6125 glp_write_lp (ats->prob, NULL, filename);
6126 GNUNET_free (filename);
6127 stat->valid = GNUNET_NO;
6128 ats->stat.recreate_problem = GNUNET_YES;
6131 stat->valid = GNUNET_YES;
6136 glp_init_iocp(&opt_mlp);
6138 opt_mlp.tm_lim = max_dur;
6141 opt_mlp.msg_lev = GLP_MSG_ALL;
6143 opt_mlp.msg_lev = GLP_MSG_OFF;
6146 result = glp_intopt (ats->prob, &opt_mlp);
6147 mlp_solution = glp_mip_status (ats->prob);
6148 stat->solution = mlp_solution;
6150 if (ats_evaluate_results(result, mlp_solution, "MLP") == GNUNET_YES)
6152 stat->valid = GNUNET_YES;
6156 // TODO: Remove if this does not appear until release
6157 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "MLP SOLUTION INVALID: %i\n", lp_solution);
6158 stat->valid = GNUNET_NO;
6163 int error = GNUNET_NO;
6165 struct ATS_mechanism *t = NULL;
6166 for (c=1; c<= (c_peers); c++ )
6169 t = peers[c].m_head;
6172 bw = glp_get_col_prim(prob, t->col_index);
6176 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);
6178 if (check ==GNUNET_YES)
6180 glp_write_sol(prob, "invalid_solution.mlp");
6181 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid solution, check invalid_solution.mlp");
6182 GNUNET_STATISTICS_update (stats, "ATS invalid solutions", 1, GNUNET_NO);
6185 if (check ==GNUNET_NO)
6193 if (glp_get_col_prim(ats->prob,2*c_mechs+1) != 1)
6196 for (c=1; c<= available_quality_metrics; c++ )
6198 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));
6200 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));
6201 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));
6202 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));
6203 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "objective value: %f\n", glp_mip_obj_val(ats->prob));
6208 static void ats_delete_problem ()
6211 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Deleting problem\n");
6215 for (c=0; c< (ats->stat).c_mechs; c++)
6216 GNUNET_free_non_null (ats->mechanisms[c].rc);
6219 if (ats->mechanisms!=NULL)
6221 GNUNET_free(ats->mechanisms);
6222 ats->mechanisms = NULL;
6225 if (ats->peers!=NULL)
6227 GNUNET_free(ats->peers);
6231 if (ats->prob != NULL)
6233 glp_delete_prob(ats->prob);
6237 ats->stat.begin_cr = GNUNET_SYSERR;
6238 ats->stat.begin_qm = GNUNET_SYSERR;
6239 ats->stat.c_mechs = 0;
6240 ats->stat.c_peers = 0;
6241 ats->stat.end_cr = GNUNET_SYSERR;
6242 ats->stat.end_qm = GNUNET_SYSERR;
6243 ats->stat.solution = GNUNET_SYSERR;
6244 ats->stat.valid = GNUNET_SYSERR;
6248 static void ats_update_problem_qm ()
6253 int c_q_metrics = available_quality_metrics;
6255 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6256 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6258 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6260 row_index = ats->stat.begin_qm;
6262 for (c=1; c <= c_q_metrics; c++)
6267 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6270 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6271 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6273 ja[array_index] = c2;
6275 GNUNET_assert (ats->mechanisms[c2].addr != NULL);
6276 GNUNET_assert (ats->mechanisms[c2].peer != NULL);
6278 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
6280 double v0 = 0, v1 = 0, v2 = 0;
6282 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6283 if (v1 < 1) v0 = 0.1;
6284 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6285 if (v1 < 1) v0 = 0.1;
6286 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6287 if (v1 < 1) v0 = 0.1;
6288 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
6291 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
6293 double v0 = 0, v1 = 0, v2 = 0;
6294 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6296 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6298 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6300 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
6302 value = (double) 10 / value;
6306 ar[array_index] = (ats->mechanisms[c2].peer->f) * value;
6308 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]);
6312 ja[array_index] = ats->stat.col_qm + c - 1;
6313 ar[array_index] = -1;
6316 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6318 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6324 GNUNET_free_non_null (ja);
6325 GNUNET_free_non_null (ar);
6329 static void ats_update_problem_cr ()
6335 double ct_max, ct_min;
6337 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6338 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6340 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6341 row_index = ats->stat.begin_cr;
6343 for (c=0; c<available_ressources; c++)
6345 ct_max = ressources[c].c_max;
6346 ct_min = ressources[c].c_min;
6348 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
6350 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
6352 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6356 GNUNET_assert (ats->mechanisms[c2].addr != NULL);
6357 GNUNET_assert (ats->mechanisms[c2].peer != NULL);
6359 ja[array_index] = c2;
6360 value = ats->mechanisms[c2].addr->ressources[c].c;
6361 ar[array_index] = value;
6363 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6367 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6373 GNUNET_free_non_null (ja);
6374 GNUNET_free_non_null (ar);
6379 static void ats_update_problem_qm_TEST ()
6384 int old_ja[ats->stat.c_mechs + 2];
6385 double old_ar[ats->stat.c_mechs + 2];
6389 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6390 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6392 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics TEST\n");
6394 if (ats->stat.begin_qm >0)
6395 row_index = ats->stat.begin_qm;
6400 for (c=0; c<available_quality_metrics; c++)
6403 c_old = glp_get_mat_row (ats->prob, row_index, old_ja, old_ar);
6405 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6407 for (c2=1; c2<=c_old; c2++)
6409 ja[c2] = old_ja[c2];
6410 if ((changed < 3) && (c2>2) && (old_ar[c2] != -1))
6412 ar[c2] = old_ar[c2] + 5 - changed;
6416 ar[c2] = old_ar[c2];
6418 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]);
6421 glp_set_mat_row (ats->prob, row_index, c_old, ja, ar);
6426 GNUNET_free_non_null (ja);
6427 GNUNET_free_non_null (ar);
6429 #endif //END: HAVE_LIBGLPK
6431 /** solve the bandwidth distribution problem
6432 * @param max_it maximum iterations
6433 * @param max_dur maximum duration in ms
6434 * @param D weight for diversity
6435 * @param U weight for utility
6436 * @param R weight for relativity
6437 * @param v_b_min minimal bandwidth per peer
6438 * @param v_n_min minimum number of connections
6439 * @param stat result struct
6440 * @return GNUNET_SYSERR if glpk is not available, number of mechanisms used
6442 static int ats_create_problem (double D, double U, double R, int v_b_min, int v_n_min, struct ATS_stat *stat)
6444 ats->prob = glp_create_prob();
6450 int c_c_ressources = available_ressources;
6451 int c_q_metrics = available_quality_metrics;
6453 double M = VERY_BIG_DOUBLE_VALUE;
6454 double Q[c_q_metrics+1];
6455 for (c=1; c<=c_q_metrics; c++)
6460 struct NeighbourList *next = neighbours;
6463 int found_addresses = GNUNET_NO;
6464 struct ReadyList *r_next = next->plugins;
6465 while (r_next != NULL)
6467 struct ForeignAddressList * a_next = r_next->addresses;
6468 while (a_next != NULL)
6471 found_addresses = GNUNET_YES;
6472 a_next = a_next->next;
6474 r_next = r_next->next;
6476 if (found_addresses) c_peers++;
6483 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No addresses for bw distribution available\n", c_peers);
6485 stat->valid = GNUNET_NO;
6488 return GNUNET_SYSERR;
6491 ats->mechanisms = GNUNET_malloc((1+c_mechs) * sizeof (struct ATS_mechanism));
6492 ats->peers = GNUNET_malloc((1+c_peers) * sizeof (struct ATS_peer));
6494 struct ATS_mechanism * mechanisms = ats->mechanisms;
6495 struct ATS_peer * peers = ats->peers;
6503 int found_addresses = GNUNET_NO;
6504 struct ReadyList *r_next = next->plugins;
6505 while (r_next != NULL)
6507 struct ForeignAddressList * a_next = r_next->addresses;
6508 while (a_next != NULL)
6510 if (found_addresses == GNUNET_NO)
6512 peers[c_peers].peer = next->id;
6513 peers[c_peers].m_head = NULL;
6514 peers[c_peers].m_tail = NULL;
6515 peers[c_peers].f = 1.0 / c_mechs;
6518 mechanisms[c_mechs].addr = a_next;
6519 mechanisms[c_mechs].col_index = c_mechs;
6520 mechanisms[c_mechs].peer = &peers[c_peers];
6521 mechanisms[c_mechs].next = NULL;
6522 mechanisms[c_mechs].plugin = r_next->plugin;
6524 GNUNET_CONTAINER_DLL_insert_tail(peers[c_peers].m_head, peers[c_peers].m_tail, &mechanisms[c_mechs]);
6525 found_addresses = GNUNET_YES;
6528 a_next = a_next->next;
6530 r_next = r_next->next;
6532 if (found_addresses == GNUNET_YES)
6539 if (v_n_min > c_peers)
6543 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);
6546 int size = 1 + 3 + 10 *c_mechs + c_peers + (c_q_metrics*c_mechs)+ c_q_metrics + c_c_ressources * c_mechs ;
6549 int * ia = GNUNET_malloc (size * sizeof (int));
6550 int * ja = GNUNET_malloc (size * sizeof (int));
6551 double * ar = GNUNET_malloc(size* sizeof (double));
6553 glp_set_prob_name(ats->prob, "gnunet ats bandwidth distribution");
6554 glp_set_obj_dir(ats->prob, GLP_MAX);
6556 /* adding columns */
6558 glp_add_cols(ats->prob, 2 * c_mechs);
6559 /* adding b_t cols */
6560 for (c=1; c <= c_mechs; c++)
6563 GNUNET_asprintf(&name, "p_%s_b%i",GNUNET_i2s(&(mechanisms[c].peer->peer)), c);
6564 glp_set_col_name(ats->prob, c, name);
6566 glp_set_col_bnds(ats->prob, c, GLP_LO, 0.0, 0.0);
6567 glp_set_obj_coef(ats->prob, c, 0);
6570 /* adding n_t cols */
6571 for (c=c_mechs+1; c <= 2*c_mechs; c++)
6573 GNUNET_asprintf(&name, "p_%s_n%i",GNUNET_i2s(&(mechanisms[c-c_mechs].peer->peer)),(c-c_mechs));
6574 glp_set_col_name(ats->prob, c, name);
6576 glp_set_col_bnds(ats->prob, c, GLP_DB, 0.0, 1.0);
6577 glp_set_col_kind(ats->prob, c, GLP_IV);
6578 glp_set_obj_coef(ats->prob, c, 0);
6581 /* feasibility constraints */
6582 /* Constraint 1: one address per peer*/
6584 glp_add_rows(ats->prob, c_peers);
6585 for (c=1; c<=c_peers; c++)
6588 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6590 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 1.0, 1.0);
6592 struct ATS_mechanism *m = peers[c].m_head;
6595 ia[array_index] = row_index;
6596 ja[array_index] = (c_mechs + m->col_index);
6597 ar[array_index] = 1;
6599 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6607 /* Constraint 2: only active mechanism gets bandwidth assigned */
6608 glp_add_rows(ats->prob, c_mechs);
6609 for (c=1; c<=c_mechs; c++)
6611 /* b_t - n_t * M <= 0 */
6613 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6615 glp_set_row_bnds(ats->prob, row_index, GLP_UP, 0.0, 0.0);
6617 ia[array_index] = row_index;
6618 ja[array_index] = mechanisms[c].col_index;
6619 ar[array_index] = 1;
6621 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6624 ia[array_index] = row_index;
6625 ja[array_index] = c_mechs + mechanisms[c].col_index;
6626 ar[array_index] = -M;
6628 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6634 /* Constraint 3: minimum bandwidth*/
6635 glp_add_rows(ats->prob, c_mechs);
6636 for (c=1; c<=c_mechs; c++)
6638 /* b_t - n_t * b_min <= 0 */
6640 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6642 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
6644 ia[array_index] = row_index;
6645 ja[array_index] = mechanisms[c].col_index;
6646 ar[array_index] = 1;
6648 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6651 ia[array_index] = row_index;
6652 ja[array_index] = c_mechs + mechanisms[c].col_index;
6653 ar[array_index] = -v_b_min;
6655 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6661 /* Constraint 4: max ressource capacity */
6662 /* V cr: bt * ct_r <= cr_max
6664 glp_add_rows(ats->prob, available_ressources);
6665 double ct_max = VERY_BIG_DOUBLE_VALUE;
6666 double ct_min = 0.0;
6668 stat->begin_cr = array_index;
6670 for (c=0; c<available_ressources; c++)
6672 ct_max = ressources[c].c_max;
6673 ct_min = ressources[c].c_min;
6675 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
6677 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
6679 for (c2=1; c2<=c_mechs; c2++)
6682 ia[array_index] = row_index;
6683 ja[array_index] = c2;
6684 value = mechanisms[c2].addr->ressources[c].c;
6685 ar[array_index] = value;
6687 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6693 stat->end_cr = array_index--;
6695 /* Constraint 5: min number of connections*/
6696 glp_add_rows(ats->prob, 1);
6697 for (c=1; c<=c_mechs; c++)
6699 // b_t - n_t * b_min >= 0
6701 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6703 glp_set_row_bnds(ats->prob, row_index, GLP_LO, v_n_min, 0.0);
6705 ia[array_index] = row_index;
6706 ja[array_index] = c_mechs + mechanisms[c].col_index;
6707 ar[array_index] = 1;
6709 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6715 // optimisation constraints
6719 // Constraint 6: optimize for diversity
6721 col_d = glp_add_cols(ats->prob, 1);
6722 stat->col_d = col_d;
6723 //GNUNET_assert (col_d == (2*c_mechs) + 1);
6724 glp_set_col_name(ats->prob, col_d, "d");
6725 glp_set_obj_coef(ats->prob, col_d, D);
6726 glp_set_col_bnds(ats->prob, col_d, GLP_LO, 0.0, 0.0);
6727 glp_add_rows(ats->prob, 1);
6729 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6731 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6732 for (c=1; c<=c_mechs; c++)
6734 // b_t - n_t * b_min >= 0
6735 ia[array_index] = row_index;
6736 ja[array_index] = c_mechs + mechanisms[c].col_index;
6737 ar[array_index] = 1;
6739 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] = col_d;
6745 ar[array_index] = -1;
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 7: optimize for quality
6755 col_qm = glp_add_cols(ats->prob, c_q_metrics);
6756 stat->col_qm = col_qm;
6757 //GNUNET_assert (col_qm == (2*c_mechs) + 3 + 1);
6758 for (c=0; c< c_q_metrics; c++)
6760 GNUNET_asprintf(&name, "Q_%s",qm[c].name);
6761 glp_set_col_name(ats->prob, col_qm + c, name);
6762 glp_set_col_bnds(ats->prob, col_qm + c, GLP_LO, 0.0, 0.0);
6764 glp_set_obj_coef(ats->prob, col_qm + c, Q[c]);
6766 glp_add_rows(ats->prob, available_quality_metrics);
6767 stat->begin_qm = row_index;
6768 for (c=1; c <= c_q_metrics; c++)
6771 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6774 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6775 for (c2=1; c2<=c_mechs; c2++)
6778 ia[array_index] = row_index;
6779 ja[array_index] = c2;
6780 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
6782 double v0 = 0, v1 = 0, v2 = 0;
6783 v0 = mechanisms[c2].addr->quality[c-1].values[0];
6784 if (v1 < 1) v0 = 0.1;
6785 v1 = mechanisms[c2].addr->quality[c-1].values[1];
6786 if (v1 < 1) v0 = 0.1;
6787 v2 = mechanisms[c2].addr->quality[c-1].values[2];
6788 if (v1 < 1) v0 = 0.1;
6789 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
6792 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
6794 double v0 = 0, v1 = 0, v2 = 0;
6795 v0 = mechanisms[c2].addr->quality[c-1].values[0];
6797 v1 = mechanisms[c2].addr->quality[c-1].values[1];
6799 v2 = mechanisms[c2].addr->quality[c-1].values[2];
6801 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
6803 value = (double) 10 / value;
6807 ar[array_index] = (mechanisms[c2].peer->f) * value ;
6809 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]);
6814 ia[array_index] = row_index;
6815 ja[array_index] = col_qm + c - 1;
6816 ar[array_index] = -1;
6818 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6823 stat->end_qm = row_index-1;
6825 // Constraint 8: optimize bandwidth utility
6827 col_u = glp_add_cols(ats->prob, 1);
6828 stat->col_u = col_u;
6829 //GNUNET_assert (col_u == (2*c_mechs) + 2);
6830 glp_set_col_name(ats->prob, col_u, "u");
6831 glp_set_obj_coef(ats->prob, col_u, U);
6832 glp_set_col_bnds(ats->prob, col_u, GLP_LO, 0.0, 0.0);
6833 glp_add_rows(ats->prob, 1);
6835 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6837 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6838 for (c=1; c<=c_mechs; c++)
6840 ia[array_index] = row_index;
6841 ja[array_index] = c;
6842 ar[array_index] = mechanisms[c].peer->f;
6844 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6848 ia[array_index] = row_index;
6849 ja[array_index] = col_u;
6850 ar[array_index] = -1;
6852 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6858 // Constraint 9: optimize relativity
6860 col_r = glp_add_cols(ats->prob, 1);
6861 stat->col_r = col_r;
6862 //GNUNET_assert (col_r == (2*c_mechs) + 3);
6863 glp_set_col_name(ats->prob, col_r, "r");
6864 glp_set_obj_coef(ats->prob, col_r, R);
6865 glp_set_col_bnds(ats->prob, col_r, GLP_LO, 0.0, 0.0);
6866 glp_add_rows(ats->prob, c_peers);
6867 for (c=1; c<=c_peers; c++)
6869 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
6871 struct ATS_mechanism *m = peers[c].m_head;
6874 ia[array_index] = row_index;
6875 ja[array_index] = m->col_index;
6876 ar[array_index] = 1 / mechanisms[c].peer->f;
6878 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6883 ia[array_index] = row_index;
6884 ja[array_index] = col_r;
6885 ar[array_index] = -1;
6887 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6894 /* Loading the matrix */
6895 glp_load_matrix(ats->prob, array_index-1, ia, ja, ar);
6897 stat->c_mechs = c_mechs;
6898 stat->c_peers = c_peers;
6900 stat->valid = GNUNET_YES;
6912 void ats_notify_ats_data (
6913 const struct GNUNET_PeerIdentity *peer,
6914 const struct GNUNET_TRANSPORT_ATS_Information *ats_data)
6917 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ATS_notify_ats_data: %s\n",GNUNET_i2s(peer));
6919 ats_calculate_bandwidth_distribution();
6921 #endif //END: HAVE_LIBGLPK
6924 ats_calculate_bandwidth_distribution ()
6928 struct GNUNET_TIME_Absolute start;
6929 struct GNUNET_TIME_Relative creation;
6930 struct GNUNET_TIME_Relative solving;
6931 char *text = "unmodified";
6933 struct GNUNET_TIME_Relative delta = GNUNET_TIME_absolute_get_difference (ats->last, GNUNET_TIME_absolute_get());
6934 if (delta.rel_value < ats->min_delta.rel_value)
6937 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "Minimum time between cycles not reached\n");
6943 if (INT_MAX < ats->max_exec_duration.rel_value)
6946 dur = (int) ats->max_exec_duration.rel_value;
6948 ats->stat.simplex_rerun_required = GNUNET_NO;
6949 start = GNUNET_TIME_absolute_get();
6950 if ((ats->stat.recreate_problem == GNUNET_YES) || (ats->prob==NULL) || (ats->stat.valid == GNUNET_NO))
6953 ats->stat.recreate_problem = GNUNET_YES;
6954 ats_delete_problem ();
6955 ats_create_problem (ats->D, ats->U, ats->R, ats->v_b_min, ats->v_n_min, &ats->stat);
6957 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);
6961 else if ((ats->stat.recreate_problem == GNUNET_NO) && (ats->stat.modified_resources == GNUNET_YES) && (ats->stat.valid == GNUNET_YES))
6963 text = "modified resources";
6964 ats_update_problem_cr();
6966 else if ((ats->stat.recreate_problem == GNUNET_NO) && (ats->stat.modified_quality == GNUNET_YES) && (ats->stat.valid == GNUNET_YES))
6968 text = "modified quality";
6969 ats_update_problem_qm();
6970 //ats_update_problem_qm_TEST ();
6974 else GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Problem is unmodified\n");
6977 creation = GNUNET_TIME_absolute_get_difference(start,GNUNET_TIME_absolute_get());
6978 start = GNUNET_TIME_absolute_get();
6980 ats->stat.solution = GLP_UNDEF;
6981 if (ats->stat.valid == GNUNET_YES)
6983 ats_solve_problem(ats->max_iterations, ats->max_exec_duration.rel_value, ats->stat.c_peers, ats->stat.c_mechs, &ats->stat);
6985 solving = GNUNET_TIME_absolute_get_difference(start,GNUNET_TIME_absolute_get());
6987 if (ats->stat.valid == GNUNET_YES)
6989 int msg_type = GNUNET_ERROR_TYPE_DEBUG;
6991 msg_type = GNUNET_ERROR_TYPE_ERROR;
6993 GNUNET_log (msg_type, "MLP %s: creation time: %llu, execution time: %llu, %i mechanisms, simplex rerun: %s, solution %s\n",
6994 text, creation.rel_value, solving.rel_value,
6996 (ats->stat.simplex_rerun_required == GNUNET_NO) ? "NO" : "YES", (ats->stat.solution == 5) ? "OPTIMAL" : "INVALID");
6997 ats->successful_executions ++;
6998 GNUNET_STATISTICS_set (stats, "# ATS successful executions", ats->successful_executions, GNUNET_NO);
7000 if ((ats->stat.recreate_problem == GNUNET_YES) || (ats->prob==NULL))
7001 GNUNET_STATISTICS_set (stats, "ATS state",ATS_NEW, GNUNET_NO);
7002 else if ((ats->stat.modified_resources == GNUNET_YES) &&
7003 (ats->stat.modified_quality == GNUNET_NO))
7004 GNUNET_STATISTICS_set (stats, "ATS state", ATS_C_UPDATED, GNUNET_NO);
7005 else if ((ats->stat.modified_resources == GNUNET_NO) &&
7006 (ats->stat.modified_quality == GNUNET_YES) &&
7007 (ats->stat.simplex_rerun_required == GNUNET_NO))
7008 GNUNET_STATISTICS_set (stats, "ATS state", ATS_Q_UPDATED, GNUNET_NO);
7009 else if ((ats->stat.modified_resources == GNUNET_YES) &&
7010 (ats->stat.modified_quality == GNUNET_YES) &&
7011 (ats->stat.simplex_rerun_required == GNUNET_NO))
7012 GNUNET_STATISTICS_set (stats, "ATS state", ATS_QC_UPDATED, GNUNET_NO);
7013 else if (ats->stat.simplex_rerun_required == GNUNET_NO)
7014 GNUNET_STATISTICS_set (stats, "ATS state", ATS_UNMODIFIED, GNUNET_NO);
7018 if (ats->stat.c_peers != 0)
7020 ats->invalid_executions ++;
7021 GNUNET_STATISTICS_set (stats, "# ATS invalid executions", ats->invalid_executions, GNUNET_NO);
7025 GNUNET_STATISTICS_set (stats, "# ATS successful executions", ats->successful_executions, GNUNET_NO);
7029 GNUNET_STATISTICS_set (stats, "ATS duration", solving.rel_value + creation.rel_value, GNUNET_NO);
7030 GNUNET_STATISTICS_set (stats, "ATS mechanisms", ats->stat.c_mechs, GNUNET_NO);
7031 GNUNET_STATISTICS_set (stats, "ATS peers", ats->stat.c_peers, GNUNET_NO);
7032 GNUNET_STATISTICS_set (stats, "ATS solution", ats->stat.solution, GNUNET_NO);
7033 GNUNET_STATISTICS_set (stats, "ATS timestamp", start.abs_value, GNUNET_NO);
7035 if ((ats->save_mlp == GNUNET_YES) && (ats->stat.c_mechs >= ats->dump_min_peers) && (ats->stat.c_mechs >= ats->dump_min_addr))
7038 if (ats->dump_overwrite == GNUNET_NO)
7040 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i_%s_%llu.mlp",
7041 ats->stat.c_peers, ats->stat.c_mechs, text, GNUNET_TIME_absolute_get().abs_value);
7042 glp_write_lp (ats->prob, NULL, filename);
7046 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i.mlp",
7047 ats->stat.c_peers, ats->stat.c_mechs );
7048 glp_write_lp (ats->prob, NULL, filename);
7050 GNUNET_free (filename);
7052 if ((ats->save_solution == GNUNET_YES) && (ats->stat.c_mechs >= ats->dump_min_peers) && (ats->stat.c_mechs >= ats->dump_min_addr))
7055 if (ats->dump_overwrite == GNUNET_NO)
7057 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i_%s_%llu.sol",
7058 ats->stat.c_peers, ats->stat.c_mechs, text, GNUNET_TIME_absolute_get().abs_value);
7059 glp_print_sol (ats->prob, filename);
7063 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i.sol",
7064 ats->stat.c_peers, ats->stat.c_mechs);
7065 glp_print_sol (ats->prob, filename);
7067 GNUNET_free (filename);
7070 ats->last = GNUNET_TIME_absolute_get();
7071 ats->stat.recreate_problem = GNUNET_NO;
7072 ats->stat.modified_resources = GNUNET_NO;
7073 ats->stat.modified_quality = GNUNET_NO;
7078 ats_schedule_calculation (void *cls,
7079 const struct GNUNET_SCHEDULER_TaskContext *tc)
7081 struct ATS_info *ats = (struct ATS_info *) cls;
7082 if (ats==NULL) return;
7084 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7085 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
7089 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Running scheduled calculation\n");
7092 ats_calculate_bandwidth_distribution (ats);
7094 ats->ats_task = GNUNET_SCHEDULER_add_delayed (ats->exec_interval,
7095 &ats_schedule_calculation, ats);
7101 unsigned long long value;
7104 ats = GNUNET_malloc(sizeof (struct ATS_info));
7106 ats->min_delta = ATS_MIN_INTERVAL;
7107 ats->exec_interval = ATS_EXEC_INTERVAL;
7108 ats->max_exec_duration = ATS_MAX_EXEC_DURATION;
7109 ats->max_iterations = ATS_MAX_ITERATIONS;
7110 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7113 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "GLPK not installed, ATS not active\n");
7120 ats->v_b_min = 64000;
7122 ats->dump_min_peers = 1;
7123 ats->dump_min_addr = 1;
7124 ats->dump_overwrite = GNUNET_NO;
7125 ats->mechanisms = NULL;
7127 ats->successful_executions = 0;
7128 ats->invalid_executions = 0;
7134 /* loading cost ressources */
7135 for (c=0; c<available_ressources; c++)
7137 GNUNET_asprintf(§ion,"%s_UP",ressources[c].cfg_param);
7138 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
7140 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "transport",section, &value))
7143 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found ressource cost: [%s] = %llu\n", section, value);
7145 ressources[c].c_max = value;
7148 GNUNET_free (section);
7149 GNUNET_asprintf(§ion,"%s_DOWN",ressources[c].cfg_param);
7150 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
7152 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "transport",section, &value))
7155 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found ressource cost: [%s] = %llu\n", section, value);
7157 ressources[c].c_min = value;
7160 GNUNET_free (section);
7163 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MLP"))
7164 ats->save_mlp = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_MLP");
7166 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_SOLUTION"))
7167 ats->save_solution = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_SOLUTION");
7168 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
7169 ats->dump_overwrite = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_OVERWRITE");
7170 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_PEERS"))
7172 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_MIN_PEERS", &value);
7173 ats->dump_min_peers= value;
7175 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_ADDRS"))
7177 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_MIN_ADDRS", &value);
7178 ats->dump_min_addr= value;
7180 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
7182 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_OVERWRITE", &value);
7183 ats->min_delta.rel_value = value;
7186 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
7188 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_MIN_INTERVAL", &value);
7189 ats->min_delta.rel_value = value;
7192 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_EXEC_INTERVAL"))
7194 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_EXEC_INTERVAL", &value);
7195 ats->exec_interval.rel_value = value;
7197 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
7199 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_MIN_INTERVAL", &value);
7200 ats->min_delta.rel_value = value;
7203 ats->ats_task = GNUNET_SCHEDULER_add_now(&ats_schedule_calculation, ats);
7207 static void ats_shutdown ()
7210 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_destroy\n");
7212 if (ats->ats_task != GNUNET_SCHEDULER_NO_TASK)
7213 GNUNET_SCHEDULER_cancel(ats->ats_task);
7214 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7217 ats_delete_problem ();
7224 void ats_notify_peer_connect (
7225 const struct GNUNET_PeerIdentity *peer,
7226 const struct GNUNET_TRANSPORT_ATS_Information *ats_data, int ats_count)
7229 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_connect: %s\n",GNUNET_i2s(peer));
7231 //update_addr_ats();
7232 ats->stat.recreate_problem = GNUNET_YES;
7233 ats_calculate_bandwidth_distribution(ats);
7236 void ats_notify_peer_disconnect (
7237 const struct GNUNET_PeerIdentity *peer)
7240 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_disconnect: %s\n",GNUNET_i2s(peer));
7242 ats->stat.recreate_problem = GNUNET_YES;
7243 ats_calculate_bandwidth_distribution (ats);
7246 struct ForeignAddressList * ats_get_preferred_address (
7247 struct NeighbourList *n)
7250 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ats_get_prefered_transport for peer: %s\n",GNUNET_i2s(&n->id));
7252 struct ReadyList *next = n->plugins;
7253 while (next != NULL)
7256 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "plugin: %s %i\n",next->plugin->short_name,strcmp(next->plugin->short_name,"unix"));
7260 return find_ready_address(n);
7264 * Initiate transport service.
7266 * @param cls closure
7267 * @param server the initialized server
7268 * @param c configuration to use
7272 struct GNUNET_SERVER_Handle *server,
7273 const struct GNUNET_CONFIGURATION_Handle *c)
7275 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
7276 {&handle_start, NULL,
7277 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
7278 {&handle_hello, NULL,
7279 GNUNET_MESSAGE_TYPE_HELLO, 0},
7280 {&handle_send, NULL,
7281 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
7282 {&handle_request_connect, NULL,
7283 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT, sizeof(struct TransportRequestConnectMessage)},
7284 {&handle_set_quota, NULL,
7285 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
7286 {&handle_address_lookup, NULL,
7287 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP,
7289 {&handle_blacklist_init, NULL,
7290 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT, sizeof (struct GNUNET_MessageHeader)},
7291 {&handle_blacklist_reply, NULL,
7292 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY, sizeof (struct BlacklistMessage)},
7298 unsigned long long tneigh;
7302 stats = GNUNET_STATISTICS_create ("transport", cfg);
7303 validation_map = GNUNET_CONTAINER_multihashmap_create (64);
7304 /* parse configuration */
7306 GNUNET_CONFIGURATION_get_value_number (c,
7311 GNUNET_CONFIGURATION_get_value_filename (c,
7313 "HOSTKEY", &keyfile)))
7315 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7317 ("Transport service is lacking key configuration settings. Exiting.\n"));
7318 GNUNET_SCHEDULER_shutdown ();
7321 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7324 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7325 validation_map = NULL;
7329 max_connect_per_transport = (uint32_t) tneigh;
7330 peerinfo = GNUNET_PEERINFO_connect (cfg);
7331 if (peerinfo == NULL)
7333 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7334 _("Could not access PEERINFO service. Exiting.\n"));
7335 GNUNET_SCHEDULER_shutdown ();
7338 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7341 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7342 validation_map = NULL;
7343 GNUNET_free (keyfile);
7346 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
7347 GNUNET_free (keyfile);
7348 if (my_private_key == NULL)
7350 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7352 ("Transport service could not access hostkey. Exiting.\n"));
7353 GNUNET_SCHEDULER_shutdown ();
7356 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7359 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7360 validation_map = NULL;
7363 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
7364 GNUNET_CRYPTO_hash (&my_public_key,
7365 sizeof (my_public_key), &my_identity.hashPubKey);
7366 /* setup notification */
7367 GNUNET_SERVER_disconnect_notify (server,
7368 &client_disconnect_notification, NULL);
7369 /* load plugins... */
7372 GNUNET_CONFIGURATION_get_value_string (c,
7373 "TRANSPORT", "PLUGINS", &plugs))
7375 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
7376 _("Starting transport plugins `%s'\n"), plugs);
7377 pos = strtok (plugs, " ");
7380 start_transport (server, pos);
7382 pos = strtok (NULL, " ");
7384 GNUNET_free (plugs);
7386 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
7387 &shutdown_task, NULL);
7394 GNUNET_log (GNUNET_ERROR_TYPE_INFO, _("Transport service ready.\n"));
7396 /* If we have a blacklist file, read from it */
7397 read_blacklist_file(cfg);
7398 /* process client requests */
7399 GNUNET_SERVER_add_handlers (server, handlers);
7404 * The main function for the transport service.
7406 * @param argc number of arguments from the command line
7407 * @param argv command line arguments
7408 * @return 0 ok, 1 on error
7411 main (int argc, char *const *argv)
7413 a2s (NULL, NULL, 0); /* make compiler happy */
7414 return (GNUNET_OK ==
7415 GNUNET_SERVICE_run (argc,
7418 GNUNET_SERVICE_OPTION_NONE,
7419 &run, NULL)) ? 0 : 1;
7422 /* end of gnunet-service-transport.c */