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 the current signature expires? (ZERO if the
281 * signature was never created).
283 struct GNUNET_TIME_Absolute pong_sig_expires;
286 * Signature for a 'struct TransportPongMessage' for this address.
288 struct GNUNET_CRYPTO_RsaSignature pong_signature;
299 * Entry in linked list of all of our plugins.
301 struct TransportPlugin
305 * This is a linked list.
307 struct TransportPlugin *next;
310 * API of the transport as returned by the plugin's
311 * initialization function.
313 struct GNUNET_TRANSPORT_PluginFunctions *api;
316 * Short name for the plugin (i.e. "tcp").
321 * Name of the library (i.e. "gnunet_plugin_transport_tcp").
326 * List of our known addresses for this transport.
328 struct OwnAddressList *addresses;
331 * Environment this transport service is using
334 struct GNUNET_TRANSPORT_PluginEnvironment env;
337 * ID of task that is used to clean up expired addresses.
339 GNUNET_SCHEDULER_TaskIdentifier address_update_task;
342 * Set to GNUNET_YES if we need to scrap the existing list of
343 * "addresses" and start fresh when we receive the next address
344 * update from a transport. Set to GNUNET_NO if we should just add
345 * the new address to the list and wait for the commit call.
349 struct ATS_plugin * rc;
352 * Hashmap of blacklisted peers for this particular transport.
354 struct GNUNET_CONTAINER_MultiHashMap *blacklist;
357 struct NeighbourList;
360 * For each neighbour we keep a list of messages
361 * that we still want to transmit to the neighbour.
367 * This is a doubly linked list.
369 struct MessageQueue *next;
372 * This is a doubly linked list.
374 struct MessageQueue *prev;
377 * The message(s) we want to transmit, GNUNET_MessageHeader(s)
378 * stuck together in memory. Allocated at the end of this struct.
380 const char *message_buf;
383 * Size of the message buf
385 size_t message_buf_size;
388 * Client responsible for queueing the message;
389 * used to check that a client has no two messages
390 * pending for the same target. Can be NULL.
392 struct TransportClient *client;
395 * Using which specific address should we send this message?
397 struct ForeignAddressList *specific_address;
400 * Peer ID of the Neighbour this entry belongs to.
402 struct GNUNET_PeerIdentity neighbour_id;
405 * Plugin that we used for the transmission.
406 * NULL until we scheduled a transmission.
408 struct TransportPlugin *plugin;
411 * At what time should we fail?
413 struct GNUNET_TIME_Absolute timeout;
416 * Internal message of the transport system that should not be
417 * included in the usual SEND-SEND_OK transmission confirmation
418 * traffic management scheme. Typically, "internal_msg" will
419 * be set whenever "client" is NULL (but it is not strictly
425 * How important is the message?
427 unsigned int priority;
433 * For a given Neighbour, which plugins are available
434 * to talk to this peer and what are their costs?
439 * This is a linked list.
441 struct ReadyList *next;
444 * Which of our transport plugins does this entry
447 struct TransportPlugin *plugin;
450 * Transport addresses, latency, and readiness for
451 * this particular plugin.
453 struct ForeignAddressList *addresses;
456 * To which neighbour does this ready list belong to?
458 struct NeighbourList *neighbour;
463 * Entry in linked list of all of our current neighbours.
469 * This is a linked list.
471 struct NeighbourList *next;
474 * Which of our transports is connected to this peer
475 * and what is their status?
477 struct ReadyList *plugins;
480 * Head of list of messages we would like to send to this peer;
481 * must contain at most one message per client.
483 struct MessageQueue *messages_head;
486 * Tail of list of messages we would like to send to this peer; must
487 * contain at most one message per client.
489 struct MessageQueue *messages_tail;
492 * Head of list of messages of messages we expected the continuation
493 * to be called to destroy the message
495 struct MessageQueue *cont_head;
498 * Tail of list of messages of messages we expected the continuation
499 * to be called to destroy the message
501 struct MessageQueue *cont_tail;
504 * Buffer for at most one payload message used when we receive
505 * payload data before our PING-PONG has succeeded. We then
506 * store such messages in this intermediary buffer until the
507 * connection is fully up.
509 struct GNUNET_MessageHeader *pre_connect_message_buffer;
512 * Context for peerinfo iteration.
513 * NULL after we are done processing peerinfo's information.
515 struct GNUNET_PEERINFO_IteratorContext *piter;
518 * Public key for this peer. Valid only if the respective flag is set below.
520 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
523 * Identity of this neighbour.
525 struct GNUNET_PeerIdentity id;
528 * ID of task scheduled to run when this peer is about to
529 * time out (will free resources associated with the peer).
531 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
534 * ID of task scheduled to run when we should retry transmitting
535 * the head of the message queue. Actually triggered when the
536 * transmission is timing out (we trigger instantly when we have
537 * a chance of success).
539 GNUNET_SCHEDULER_TaskIdentifier retry_task;
542 * How long until we should consider this peer dead
543 * (if we don't receive another message in the
546 struct GNUNET_TIME_Absolute peer_timeout;
549 * Tracker for inbound bandwidth.
551 struct GNUNET_BANDWIDTH_Tracker in_tracker;
554 * The latency we have seen for this particular address for
555 * this particular peer. This latency may have been calculated
556 * over multiple transports. This value reflects how long it took
557 * us to receive a response when SENDING via this particular
558 * transport/neighbour/address combination!
560 * FIXME: we need to periodically send PINGs to update this
561 * latency (at least more often than the current "huge" (11h?)
564 struct GNUNET_TIME_Relative latency;
567 * How often has the other peer (recently) violated the
568 * inbound traffic limit? Incremented by 10 per violation,
569 * decremented by 1 per non-violation (for each
572 unsigned int quota_violation_count;
575 * DV distance to this peer (1 if no DV is used).
580 * Have we seen an PONG from this neighbour in the past (and
581 * not had a disconnect since)?
586 * Do we have a valid public key for this neighbour?
588 int public_key_valid;
591 * Performance data for the peer.
593 struct GNUNET_TRANSPORT_ATS_Information *ats;
596 * Identity of the neighbour.
598 struct GNUNET_PeerIdentity peer;
603 * Message used to ask a peer to validate receipt (to check an address
604 * from a HELLO). Followed by the address we are trying to validate,
605 * or an empty address if we are just sending a PING to confirm that a
606 * connection which the receiver (of the PING) initiated is still valid.
608 struct TransportPingMessage
612 * Type will be GNUNET_MESSAGE_TYPE_TRANSPORT_PING
614 struct GNUNET_MessageHeader header;
617 * Challenge code (to ensure fresh reply).
619 uint32_t challenge GNUNET_PACKED;
622 * Who is the intended recipient?
624 struct GNUNET_PeerIdentity target;
630 * Message used to validate a HELLO. The challenge is included in the
631 * confirmation to make matching of replies to requests possible. The
632 * signature signs our public key, an expiration time and our address.<p>
634 * This message is followed by our transport address that the PING tried
635 * to confirm (if we liked it). The address can be empty (zero bytes)
636 * if the PING had not address either (and we received the request via
637 * a connection that we initiated).
639 struct TransportPongMessage
643 * Type will be GNUNET_MESSAGE_TYPE_TRANSPORT_PONG
645 struct GNUNET_MessageHeader header;
648 * Challenge code from PING (showing freshness). Not part of what
649 * is signed so that we can re-use signatures.
651 uint32_t challenge GNUNET_PACKED;
656 struct GNUNET_CRYPTO_RsaSignature signature;
659 * What are we signing and why? Two possible reason codes can be here:
660 * GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN to confirm that this is a
661 * plausible address for this peer (pid is set to identity of signer); or
662 * GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING to confirm that this is
663 * an address we used to connect to the peer with the given pid.
665 struct GNUNET_CRYPTO_RsaSignaturePurpose purpose;
668 * When does this signature expire?
670 struct GNUNET_TIME_AbsoluteNBO expiration;
673 * Either the identity of the peer Who signed this message, or the
674 * identity of the peer that we're connected to using the given
675 * address (depending on purpose.type).
677 struct GNUNET_PeerIdentity pid;
680 * Size of address appended to this message (part of what is
681 * being signed, hence not redundant).
689 * Linked list of messages to be transmitted to the client. Each
690 * entry is followed by the actual message.
692 struct ClientMessageQueueEntry
695 * This is a doubly-linked list.
697 struct ClientMessageQueueEntry *next;
700 * This is a doubly-linked list.
702 struct ClientMessageQueueEntry *prev;
707 * Client connected to the transport service.
709 struct TransportClient
713 * This is a linked list.
715 struct TransportClient *next;
718 * Handle to the client.
720 struct GNUNET_SERVER_Client *client;
723 * Linked list of messages yet to be transmitted to
726 struct ClientMessageQueueEntry *message_queue_head;
729 * Tail of linked list of messages yet to be transmitted to the
732 struct ClientMessageQueueEntry *message_queue_tail;
735 * Current transmit request handle.
737 struct GNUNET_CONNECTION_TransmitHandle *th;
740 * Is a call to "transmit_send_continuation" pending? If so, we
741 * must not free this struct (even if the corresponding client
742 * disconnects) and instead only remove it from the linked list and
743 * set the "client" field to NULL.
748 * Length of the list of messages pending for this client.
750 unsigned int message_count;
756 * Context of currently active requests to peerinfo
757 * for validation of HELLOs.
759 struct CheckHelloValidatedContext;
763 * Entry in map of all HELLOs awaiting validation.
765 struct ValidationEntry
769 * NULL if this entry is not part of a larger HELLO validation.
771 struct CheckHelloValidatedContext *chvc;
774 * The address, actually a pointer to the end
775 * of this struct. Do not free!
780 * Name of the transport.
782 char *transport_name;
785 * The public key of the peer.
787 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
790 * ID of task that will clean up this entry if we don't succeed
791 * with the validation first.
793 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
796 * At what time did we send this validation?
798 struct GNUNET_TIME_Absolute send_time;
801 * Session being validated (or NULL for none).
803 struct Session *session;
806 * Challenge number we used.
819 * Context of currently active requests to peerinfo
820 * for validation of HELLOs.
822 struct CheckHelloValidatedContext
826 * This is a doubly-linked list.
828 struct CheckHelloValidatedContext *next;
831 * This is a doubly-linked list.
833 struct CheckHelloValidatedContext *prev;
836 * Hello that we are validating.
838 const struct GNUNET_HELLO_Message *hello;
841 * Context for peerinfo iteration.
842 * NULL after we are done processing peerinfo's information.
844 struct GNUNET_PEERINFO_IteratorContext *piter;
847 * Was a HELLO known for this peer to peerinfo?
852 * Number of validation entries currently referring to this
855 unsigned int ve_count;
858 struct ATS_quality_metric
867 struct ATS_mechanism * prev;
868 struct ATS_mechanism * next;
869 struct ForeignAddressList * addr;
870 struct TransportPlugin * plugin;
871 struct ATS_peer * peer;
874 struct ATS_ressource_cost * rc;
880 struct GNUNET_PeerIdentity peer;
881 struct NeighbourList * n;
882 struct ATS_mechanism * m_head;
883 struct ATS_mechanism * m_tail;
885 /* preference value f */
893 * result of last GLPK run
899 * Ressource costs or quality metrics changed
900 * update problem before solving
902 int modified_resources;
905 * Ressource costs or quality metrics changed, update matrix
906 * update problem before solving
908 int modified_quality;
911 * Peers have connected or disconnected
912 * problem has to be recreated
914 int recreate_problem;
917 * Was the available basis invalid and we needed to rerun simplex?
919 int simplex_rerun_required;
922 * is problem currently valid and can it be solved
927 * Number of transport mechanisms in the problem
932 * Number of transport mechanisms in the problem
937 * row index where quality related rows start
942 * row index where quality related rows end
947 * row index where ressource cost related rows start
952 * row index where ressource cost related rows end
957 * column index for objective function value d
962 * column index for objective function value u
967 * column index for objective function value r
972 * column index for objective function value quality metrics
977 * column index for objective function value cost ressources
982 struct ATS_ressource_entry
984 /* index in ressources array */
986 /* depending ATSi parameter to calculcate limits */
995 /* index in ressources array */
997 /* depending ATSi parameter to calculcate limits */
999 /* cfg option to load limits */
1006 /* cofficients for the specific plugins */
1016 static struct ATS_ressource ressources[] =
1018 /* FIXME: the coefficients for the specific plugins */
1019 {1, 7, "LAN_BW_LIMIT", 0, VERY_BIG_DOUBLE_VALUE, 0, 1, 1, 2, 2, 1, 3},
1020 {2, 7, "WAN_BW_LIMIT", 0, VERY_BIG_DOUBLE_VALUE, 0, 1, 1, 2, 2, 2, 3},
1021 {3, 4, "WLAN_ENERGY_LIMIT", 0, VERY_BIG_DOUBLE_VALUE, 0, 0, 0, 0, 0, 2, 1}
1023 {4, 4, "COST_ENERGY_CONSUMPTION", VERY_BIG_DOUBLE_VALUE},
1024 {5, 5, "COST_CONNECT", VERY_BIG_DOUBLE_VALUE},
1025 {6, 6, "COST_BANDWITH_AVAILABLE", VERY_BIG_DOUBLE_VALUE},
1026 {7, 7, "COST_NETWORK_OVERHEAD", VERY_BIG_DOUBLE_VALUE},*/
1029 static int available_ressources = 3;
1037 * Time of last execution
1039 struct GNUNET_TIME_Absolute last;
1041 * Minimum intervall between two executions
1043 struct GNUNET_TIME_Relative min_delta;
1045 * Regular intervall when execution is triggered
1047 struct GNUNET_TIME_Relative exec_interval;
1049 * Maximum execution time per calculation
1051 struct GNUNET_TIME_Relative max_exec_duration;
1055 * GLPK (MLP) problem object
1061 * task to recalculate the bandwidth assignment
1063 GNUNET_SCHEDULER_TaskIdentifier ats_task;
1066 * Current state of the GLPK problem
1068 struct ATS_stat stat;
1071 * mechanisms used in current problem
1072 * needed for problem modification
1074 struct ATS_mechanism * mechanisms;
1077 * peers used in current problem
1078 * needed for problem modification
1080 struct ATS_peer * peers;
1083 * number of successful executions
1085 int successful_executions;
1088 * number with an invalid result
1090 int invalid_executions;
1093 * Maximum number of LP iterations per calculation
1098 * Dump problem to a file?
1103 * Dump solution to a file
1108 * Dump solution when minimum peers:
1113 * Dump solution when minimum addresses:
1118 * Dump solution overwrite file:
1138 * Minimum bandwidth per peer
1143 * Minimum number of connections per peer
1150 * Our HELLO message.
1152 static struct GNUNET_HELLO_Message *our_hello;
1157 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
1162 static struct GNUNET_PeerIdentity my_identity;
1167 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
1170 * Our configuration.
1172 const struct GNUNET_CONFIGURATION_Handle *cfg;
1175 * Linked list of all clients to this service.
1177 static struct TransportClient *clients;
1180 * All loaded plugins.
1182 static struct TransportPlugin *plugins;
1185 * Handle to peerinfo service.
1187 static struct GNUNET_PEERINFO_Handle *peerinfo;
1190 * All known neighbours and their HELLOs.
1192 static struct NeighbourList *neighbours;
1195 * Number of neighbours we'd like to have.
1197 static uint32_t max_connect_per_transport;
1200 * Head of linked list.
1202 static struct CheckHelloValidatedContext *chvc_head;
1205 * Tail of linked list.
1207 static struct CheckHelloValidatedContext *chvc_tail;
1210 * Map of PeerIdentities to 'struct ValidationEntry*'s (addresses
1211 * of the given peer that we are currently validating).
1213 static struct GNUNET_CONTAINER_MultiHashMap *validation_map;
1216 * Handle for reporting statistics.
1218 static struct GNUNET_STATISTICS_Handle *stats;
1221 * Identifier of 'refresh_hello' task.
1223 static GNUNET_SCHEDULER_TaskIdentifier hello_task;
1226 * Is transport service shutting down ?
1228 static int shutdown_in_progress;
1231 * Handle for ats information
1233 static struct ATS_info *ats;
1235 struct ATS_quality_entry
1243 static struct ATS_quality_metric qm[] =
1245 {1, 1028, "QUALITY_NET_DISTANCE"},
1246 {2, 1034, "QUALITY_NET_DELAY"},
1248 static int available_quality_metrics = 2;
1252 * The peer specified by the given neighbour has timed-out or a plugin
1253 * has disconnected. We may either need to do nothing (other plugins
1254 * still up), or trigger a full disconnect and clean up. This
1255 * function updates our state and do the necessary notifications.
1256 * Also notifies our clients that the neighbour is now officially
1259 * @param n the neighbour list entry for the peer
1260 * @param check should we just check if all plugins
1261 * disconnected or must we ask all plugins to
1264 static void disconnect_neighbour (struct NeighbourList *n, int check);
1267 * Check the ready list for the given neighbour and if a plugin is
1268 * ready for transmission (and if we have a message), do so!
1270 * @param nexi target peer for which to transmit
1272 static void try_transmission_to_peer (struct NeighbourList *n);
1274 static void ats_shutdown ( );
1276 static void ats_notify_peer_connect (
1277 const struct GNUNET_PeerIdentity *peer,
1278 const struct GNUNET_TRANSPORT_ATS_Information *ats_data, int ats_count);
1280 static void ats_notify_peer_disconnect (
1281 const struct GNUNET_PeerIdentity *peer);
1284 static void ats_notify_ats_data (
1285 const struct GNUNET_PeerIdentity *peer,
1286 const struct GNUNET_TRANSPORT_ATS_Information *ats_data);
1289 struct ForeignAddressList * ats_get_preferred_address (
1290 struct NeighbourList *n);
1293 ats_calculate_bandwidth_distribution ();
1296 * Find an entry in the neighbour list for a particular peer.
1298 * @return NULL if not found.
1300 static struct NeighbourList *
1301 find_neighbour (const struct GNUNET_PeerIdentity *key)
1303 struct NeighbourList *head = neighbours;
1305 while ((head != NULL) &&
1306 (0 != memcmp (key, &head->id, sizeof (struct GNUNET_PeerIdentity))))
1311 static int update_addr_value (struct ForeignAddressList *fal, uint32_t value , int ats_index)
1314 int set = GNUNET_NO;
1315 for (c=0; c<available_quality_metrics; c++)
1317 if (ats_index == qm[c].atis_index)
1319 fal->quality[c].values[0] = fal->quality[c].values[1];
1320 fal->quality[c].values[1] = fal->quality[c].values[2];
1321 fal->quality[c].values[2] = value;
1323 ats->stat.modified_quality = GNUNET_YES;
1326 if (set == GNUNET_NO)
1328 for (c=0; c<available_ressources; c++)
1330 if (ats_index == ressources[c].atis_index)
1332 fal->ressources[c].c = value;
1334 ats->stat.modified_resources = GNUNET_YES;
1343 update_addr_ats (struct ForeignAddressList *fal,
1344 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
1349 for (c1=0; c1<ats_count; c1++)
1351 set = update_addr_value(fal, ntohl(ats_data[c1].value), ntohl(ats_data[c1].type));
1357 * Find an entry in the transport list for a particular transport.
1359 * @return NULL if not found.
1361 static struct TransportPlugin *
1362 find_transport (const char *short_name)
1364 struct TransportPlugin *head = plugins;
1365 while ((head != NULL) && (0 != strcmp (short_name, head->short_name)))
1371 * Is a particular peer blacklisted for a particular transport?
1373 * @param peer the peer to check for
1374 * @param plugin the plugin used to connect to the peer
1376 * @return GNUNET_YES if the peer is blacklisted, GNUNET_NO if not
1379 is_blacklisted (const struct GNUNET_PeerIdentity *peer, struct TransportPlugin *plugin)
1382 if (plugin->blacklist != NULL)
1384 if (GNUNET_CONTAINER_multihashmap_contains (plugin->blacklist, &peer->hashPubKey) == GNUNET_YES)
1387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1388 "Peer `%s:%s' is blacklisted!\n",
1389 plugin->short_name, GNUNET_i2s (peer));
1392 GNUNET_STATISTICS_update (stats, "# blacklisted peers refused", 1, GNUNET_NO);
1402 add_peer_to_blacklist (struct GNUNET_PeerIdentity *peer,
1403 char *transport_name)
1405 struct TransportPlugin *plugin;
1407 plugin = find_transport(transport_name);
1408 if (plugin == NULL) /* Nothing to do */
1411 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1412 "Adding peer `%s' with plugin `%s' to blacklist\n",
1416 if (plugin->blacklist == NULL)
1417 plugin->blacklist = GNUNET_CONTAINER_multihashmap_create(TRANSPORT_BLACKLIST_HT_SIZE);
1418 GNUNET_assert(plugin->blacklist != NULL);
1419 GNUNET_CONTAINER_multihashmap_put(plugin->blacklist, &peer->hashPubKey,
1421 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1426 * Read the blacklist file, containing transport:peer entries.
1427 * Provided the transport is loaded, set up hashmap with these
1428 * entries to blacklist peers by transport.
1432 read_blacklist_file (const struct GNUNET_CONFIGURATION_Handle *cfg)
1439 struct GNUNET_PeerIdentity pid;
1441 struct GNUNET_CRYPTO_HashAsciiEncoded enc;
1442 unsigned int entries_found;
1443 char *transport_name;
1446 GNUNET_CONFIGURATION_get_value_filename (cfg,
1452 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1453 "Option `%s' in section `%s' not specified!\n",
1459 if (GNUNET_OK != GNUNET_DISK_file_test (fn))
1460 GNUNET_DISK_fn_write (fn, NULL, 0, GNUNET_DISK_PERM_USER_READ
1461 | GNUNET_DISK_PERM_USER_WRITE);
1462 if (0 != STAT (fn, &frstat))
1464 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1465 _("Could not read blacklist file `%s'\n"), fn);
1469 if (frstat.st_size == 0)
1472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1473 _("Blacklist file `%s' is empty.\n"),
1479 /* FIXME: use mmap */
1480 data = GNUNET_malloc_large (frstat.st_size);
1481 GNUNET_assert(data != NULL);
1482 if (frstat.st_size !=
1483 GNUNET_DISK_fn_read (fn, data, frstat.st_size))
1485 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1486 _("Failed to read blacklist from `%s'\n"), fn);
1493 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1495 while ((frstat.st_size >= sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded)) &&
1496 (pos <= frstat.st_size - sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded)))
1499 while ((colon_pos < frstat.st_size) && (data[colon_pos] != ':') && !isspace ( (unsigned char) data[colon_pos]))
1502 if (colon_pos >= frstat.st_size)
1504 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1505 _("Syntax error in blacklist file at offset %llu, giving up!\n"),
1506 (unsigned long long) colon_pos);
1512 if (isspace( (unsigned char) data[colon_pos]))
1514 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1515 _("Syntax error in blacklist file at offset %llu, skipping bytes.\n"),
1516 (unsigned long long) colon_pos);
1518 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1522 tsize = colon_pos - pos;
1523 if ((pos >= frstat.st_size) || (pos + tsize >= frstat.st_size) || (tsize == 0))
1525 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1526 _("Syntax error in blacklist file at offset %llu, giving up!\n"),
1527 (unsigned long long) colon_pos);
1536 transport_name = GNUNET_malloc(tsize + 1);
1537 memcpy(transport_name, &data[pos], tsize);
1538 pos = colon_pos + 1;
1540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1541 "Read transport name %s in blacklist file.\n",
1544 memcpy (&enc, &data[pos], sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded));
1545 if (!isspace ( (unsigned char) enc.encoding[sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded) - 1]))
1547 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1548 _("Syntax error in blacklist file at offset %llu, skipping bytes.\n"),
1549 (unsigned long long) pos);
1551 while ((pos < frstat.st_size) && (!isspace ( (unsigned char) data[pos])))
1553 GNUNET_free_non_null(transport_name);
1556 enc.encoding[sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded) - 1] = '\0';
1557 if (GNUNET_OK != GNUNET_CRYPTO_hash_from_string ((char *) &enc, &pid.hashPubKey))
1559 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1560 _("Syntax error in blacklist file at offset %llu, skipping bytes `%s'.\n"),
1561 (unsigned long long) pos,
1566 if (0 != memcmp (&pid,
1568 sizeof (struct GNUNET_PeerIdentity)))
1571 add_peer_to_blacklist (&pid,
1576 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1577 _("Found myself `%s' in blacklist (useless, ignored)\n"),
1581 pos = pos + sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded);
1582 GNUNET_free_non_null(transport_name);
1583 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1586 GNUNET_STATISTICS_update (stats, "# Transport entries blacklisted", entries_found, GNUNET_NO);
1593 * Function called to notify a client about the socket being ready to
1594 * queue more data. "buf" will be NULL and "size" zero if the socket
1595 * was closed for writing in the meantime.
1597 * @param cls closure
1598 * @param size number of bytes available in buf
1599 * @param buf where the callee should write the message
1600 * @return number of bytes written to buf
1603 transmit_to_client_callback (void *cls, size_t size, void *buf)
1605 struct TransportClient *client = cls;
1606 struct ClientMessageQueueEntry *q;
1609 const struct GNUNET_MessageHeader *msg;
1616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1617 "Transmission to client failed, closing connection.\n");
1619 /* fatal error with client, free message queue! */
1620 while (NULL != (q = client->message_queue_head))
1622 GNUNET_STATISTICS_update (stats,
1623 gettext_noop ("# bytes discarded (could not transmit to client)"),
1624 ntohs (((const struct GNUNET_MessageHeader*)&q[1])->size),
1626 GNUNET_CONTAINER_DLL_remove (client->message_queue_head,
1627 client->message_queue_tail,
1631 client->message_count = 0;
1636 while (NULL != (q = client->message_queue_head))
1638 msg = (const struct GNUNET_MessageHeader *) &q[1];
1639 msize = ntohs (msg->size);
1640 if (msize + tsize > size)
1643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1644 "Transmitting message of type %u to client.\n",
1647 GNUNET_CONTAINER_DLL_remove (client->message_queue_head,
1648 client->message_queue_tail,
1650 memcpy (&cbuf[tsize], msg, msize);
1653 client->message_count--;
1657 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
1658 client->th = GNUNET_SERVER_notify_transmit_ready (client->client,
1660 GNUNET_TIME_UNIT_FOREVER_REL,
1661 &transmit_to_client_callback,
1663 GNUNET_assert (client->th != NULL);
1670 * Convert an address to a string.
1672 * @param plugin name of the plugin responsible for the address
1673 * @param addr binary address
1674 * @param addr_len number of bytes in addr
1675 * @return NULL on error, otherwise address string
1678 a2s (const char *plugin,
1682 struct TransportPlugin *p;
1686 p = find_transport (plugin);
1687 if ((p == NULL) || (addr_len == 0) || (addr == NULL))
1690 return p->api->address_to_string (NULL,
1700 * Iterator to free entries in the validation_map.
1702 * @param cls closure (unused)
1703 * @param key current key code
1704 * @param value value in the hash map (validation to abort)
1705 * @return GNUNET_YES (always)
1708 abort_validation (void *cls,
1709 const GNUNET_HashCode * key,
1712 struct ValidationEntry *va = value;
1714 if (GNUNET_SCHEDULER_NO_TASK != va->timeout_task)
1715 GNUNET_SCHEDULER_cancel (va->timeout_task);
1716 GNUNET_free (va->transport_name);
1717 if (va->chvc != NULL)
1719 va->chvc->ve_count--;
1720 if (va->chvc->ve_count == 0)
1722 GNUNET_CONTAINER_DLL_remove (chvc_head,
1725 GNUNET_free (va->chvc);
1735 * HELLO validation cleanup task (validation failed).
1737 * @param cls the 'struct ValidationEntry' that failed
1738 * @param tc scheduler context (unused)
1741 timeout_hello_validation (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1743 struct ValidationEntry *va = cls;
1744 struct GNUNET_PeerIdentity pid;
1746 va->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1747 GNUNET_STATISTICS_update (stats,
1748 gettext_noop ("# address validation timeouts"),
1751 GNUNET_CRYPTO_hash (&va->publicKey,
1753 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1755 GNUNET_break (GNUNET_OK ==
1756 GNUNET_CONTAINER_multihashmap_remove (validation_map,
1759 abort_validation (NULL, NULL, va);
1765 * Send the specified message to the specified client. Since multiple
1766 * messages may be pending for the same client at a time, this code
1767 * makes sure that no message is lost.
1769 * @param client client to transmit the message to
1770 * @param msg the message to send
1771 * @param may_drop can this message be dropped if the
1772 * message queue for this client is getting far too large?
1775 transmit_to_client (struct TransportClient *client,
1776 const struct GNUNET_MessageHeader *msg, int may_drop)
1778 struct ClientMessageQueueEntry *q;
1781 if ((client->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
1783 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1785 ("Dropping message of type %u and size %u, have %u messages pending (%u is the soft limit)\n"),
1788 client->message_count,
1790 GNUNET_STATISTICS_update (stats,
1791 gettext_noop ("# messages dropped due to slow client"),
1796 msize = ntohs (msg->size);
1797 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
1798 q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
1799 memcpy (&q[1], msg, msize);
1800 GNUNET_CONTAINER_DLL_insert_after (client->message_queue_head,
1801 client->message_queue_tail,
1802 client->message_queue_tail,
1804 client->message_count++;
1805 if (client->th == NULL)
1807 client->th = GNUNET_SERVER_notify_transmit_ready (client->client,
1809 GNUNET_TIME_UNIT_FOREVER_REL,
1810 &transmit_to_client_callback,
1812 GNUNET_assert (client->th != NULL);
1818 * Transmit a 'SEND_OK' notification to the given client for the
1821 * @param client who to notify
1822 * @param n neighbour to notify about, can be NULL (on failure)
1823 * @param target target of the transmission
1824 * @param result status code for the transmission request
1827 transmit_send_ok (struct TransportClient *client,
1828 struct NeighbourList *n,
1829 const struct GNUNET_PeerIdentity *target,
1832 struct SendOkMessage send_ok_msg;
1834 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
1835 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
1836 send_ok_msg.success = htonl (result);
1838 send_ok_msg.latency = GNUNET_TIME_relative_hton (n->latency);
1840 send_ok_msg.latency = GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
1841 send_ok_msg.peer = *target;
1842 transmit_to_client (client, &send_ok_msg.header, GNUNET_NO);
1847 * Mark the given FAL entry as 'connected' (and hence preferred for
1848 * sending); also mark all others for the same peer as 'not connected'
1849 * (since only one can be preferred).
1851 * @param fal address to set to 'connected'
1854 mark_address_connected (struct ForeignAddressList *fal);
1859 * We should re-try transmitting to the given peer,
1860 * hopefully we've learned something in the meantime.
1863 retry_transmission_task (void *cls,
1864 const struct GNUNET_SCHEDULER_TaskContext *tc)
1866 struct NeighbourList *n = cls;
1868 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
1869 try_transmission_to_peer (n);
1874 * Function called by the GNUNET_TRANSPORT_TransmitFunction
1875 * upon "completion" of a send request. This tells the API
1876 * that it is now legal to send another message to the given
1879 * @param cls closure, identifies the entry on the
1880 * message queue that was transmitted and the
1881 * client responsible for queuing the message
1882 * @param target the peer receiving the message
1883 * @param result GNUNET_OK on success, if the transmission
1884 * failed, we should not tell the client to transmit
1888 transmit_send_continuation (void *cls,
1889 const struct GNUNET_PeerIdentity *target,
1892 struct MessageQueue *mq = cls;
1893 struct NeighbourList *n;
1895 GNUNET_STATISTICS_update (stats,
1896 gettext_noop ("# bytes pending with plugins"),
1897 - (int64_t) mq->message_buf_size,
1899 if (result == GNUNET_OK)
1901 GNUNET_STATISTICS_update (stats,
1902 gettext_noop ("# bytes successfully transmitted by plugins"),
1903 mq->message_buf_size,
1908 GNUNET_STATISTICS_update (stats,
1909 gettext_noop ("# bytes with transmission failure by plugins"),
1910 mq->message_buf_size,
1913 if (mq->specific_address != NULL)
1915 if (result == GNUNET_OK)
1917 mq->specific_address->timeout =
1918 GNUNET_TIME_relative_to_absolute
1919 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
1920 if (mq->specific_address->validated == GNUNET_YES)
1921 mark_address_connected (mq->specific_address);
1925 if (mq->specific_address->connected != GNUNET_NO)
1928 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1929 "Marking address `%s' as no longer connected (due to transmission problem)\n",
1930 a2s (mq->specific_address->ready_list->plugin->short_name,
1931 mq->specific_address->addr,
1932 mq->specific_address->addrlen));
1934 GNUNET_STATISTICS_update (stats,
1935 gettext_noop ("# connected addresses"),
1938 mq->specific_address->connected = GNUNET_NO;
1941 if (! mq->internal_msg)
1942 mq->specific_address->in_transmit = GNUNET_NO;
1944 n = find_neighbour (&mq->neighbour_id);
1945 if (mq->client != NULL)
1946 transmit_send_ok (mq->client, n, target, result);
1949 GNUNET_CONTAINER_DLL_remove (n->cont_head,
1956 if (result == GNUNET_OK)
1957 try_transmission_to_peer (n);
1958 else if (GNUNET_SCHEDULER_NO_TASK == n->retry_task)
1959 n->retry_task = GNUNET_SCHEDULER_add_now (&retry_transmission_task,
1966 * Check the ready list for the given neighbour and if a plugin is
1967 * ready for transmission (and if we have a message), do so!
1969 * @param neighbour target peer for which to transmit
1972 try_transmission_to_peer (struct NeighbourList *n)
1974 struct ReadyList *rl;
1975 struct MessageQueue *mq;
1976 struct GNUNET_TIME_Relative timeout;
1980 if (n->messages_head == NULL)
1983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1984 "Transmission queue for `%4s' is empty\n",
1985 GNUNET_i2s (&n->id));
1987 return; /* nothing to do */
1990 mq = n->messages_head;
1991 force_address = GNUNET_YES;
1992 if (mq->specific_address == NULL)
1995 mq->specific_address = ats_get_preferred_address(n);
1996 GNUNET_STATISTICS_update (stats,
1997 gettext_noop ("# transport selected peer address freely"),
2000 force_address = GNUNET_NO;
2002 if (mq->specific_address == NULL)
2004 GNUNET_STATISTICS_update (stats,
2005 gettext_noop ("# transport failed to selected peer address"),
2008 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
2009 if (timeout.rel_value == 0)
2012 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2013 "No destination address available to transmit message of size %u to peer `%4s'\n",
2014 mq->message_buf_size,
2015 GNUNET_i2s (&mq->neighbour_id));
2017 GNUNET_STATISTICS_update (stats,
2018 gettext_noop ("# bytes in message queue for other peers"),
2019 - (int64_t) mq->message_buf_size,
2021 GNUNET_STATISTICS_update (stats,
2022 gettext_noop ("# bytes discarded (no destination address available)"),
2023 mq->message_buf_size,
2025 if (mq->client != NULL)
2026 transmit_send_ok (mq->client, n, &n->id, GNUNET_NO);
2027 GNUNET_CONTAINER_DLL_remove (n->messages_head,
2031 return; /* nobody ready */
2033 GNUNET_STATISTICS_update (stats,
2034 gettext_noop ("# message delivery deferred (no address)"),
2037 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
2038 GNUNET_SCHEDULER_cancel (n->retry_task);
2039 n->retry_task = GNUNET_SCHEDULER_add_delayed (timeout,
2040 &retry_transmission_task,
2043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2044 "No validated destination address available to transmit message of size %u to peer `%4s', will wait %llums to find an address.\n",
2045 mq->message_buf_size,
2046 GNUNET_i2s (&mq->neighbour_id),
2049 /* FIXME: might want to trigger peerinfo lookup here
2050 (unless that's already pending...) */
2053 GNUNET_CONTAINER_DLL_remove (n->messages_head,
2056 if (mq->specific_address->connected == GNUNET_NO)
2057 mq->specific_address->connect_attempts++;
2058 rl = mq->specific_address->ready_list;
2059 mq->plugin = rl->plugin;
2060 if (!mq->internal_msg)
2061 mq->specific_address->in_transmit = GNUNET_YES;
2063 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2064 "Sending message of size %u for `%4s' to `%s' via plugin `%s'\n",
2065 mq->message_buf_size,
2066 GNUNET_i2s (&n->id),
2067 (mq->specific_address->addr != NULL)
2068 ? a2s (mq->plugin->short_name,
2069 mq->specific_address->addr,
2070 mq->specific_address->addrlen)
2072 rl->plugin->short_name);
2074 GNUNET_STATISTICS_update (stats,
2075 gettext_noop ("# bytes in message queue for other peers"),
2076 - (int64_t) mq->message_buf_size,
2078 GNUNET_STATISTICS_update (stats,
2079 gettext_noop ("# bytes pending with plugins"),
2080 mq->message_buf_size,
2083 GNUNET_CONTAINER_DLL_insert (n->cont_head,
2087 ret = rl->plugin->api->send (rl->plugin->api->cls,
2090 mq->message_buf_size,
2092 GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
2093 mq->specific_address->session,
2094 mq->specific_address->addr,
2095 mq->specific_address->addrlen,
2097 &transmit_send_continuation, mq);
2100 /* failure, but 'send' would not call continuation in this case,
2101 so we need to do it here! */
2102 transmit_send_continuation (mq,
2110 * Send the specified message to the specified peer.
2112 * @param client source of the transmission request (can be NULL)
2113 * @param peer_address ForeignAddressList where we should send this message
2114 * @param priority how important is the message
2115 * @param timeout how long do we have to transmit?
2116 * @param message_buf message(s) to send GNUNET_MessageHeader(s)
2117 * @param message_buf_size total size of all messages in message_buf
2118 * @param is_internal is this an internal message; these are pre-pended and
2119 * also do not count for plugins being "ready" to transmit
2120 * @param neighbour handle to the neighbour for transmission
2123 transmit_to_peer (struct TransportClient *client,
2124 struct ForeignAddressList *peer_address,
2125 unsigned int priority,
2126 struct GNUNET_TIME_Relative timeout,
2127 const char *message_buf,
2128 size_t message_buf_size,
2129 int is_internal, struct NeighbourList *neighbour)
2131 struct MessageQueue *mq;
2136 /* check for duplicate submission */
2137 mq = neighbour->messages_head;
2140 if (mq->client == client)
2142 /* client transmitted to same peer twice
2143 before getting SEND_OK! */
2151 GNUNET_STATISTICS_update (stats,
2152 gettext_noop ("# bytes in message queue for other peers"),
2155 mq = GNUNET_malloc (sizeof (struct MessageQueue) + message_buf_size);
2156 mq->specific_address = peer_address;
2157 mq->client = client;
2158 /* FIXME: this memcpy can be up to 7% of our total runtime! */
2159 memcpy (&mq[1], message_buf, message_buf_size);
2160 mq->message_buf = (const char*) &mq[1];
2161 mq->message_buf_size = message_buf_size;
2162 memcpy(&mq->neighbour_id, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
2163 mq->internal_msg = is_internal;
2164 mq->priority = priority;
2165 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
2167 GNUNET_CONTAINER_DLL_insert (neighbour->messages_head,
2168 neighbour->messages_tail,
2171 GNUNET_CONTAINER_DLL_insert_after (neighbour->messages_head,
2172 neighbour->messages_tail,
2173 neighbour->messages_tail,
2175 try_transmission_to_peer (neighbour);
2180 * Send a plain PING (without address or our HELLO) to the given
2181 * foreign address to try to establish a connection (and validate
2182 * that the other peer is really who he claimed he is).
2184 * @param n neighbour to PING
2187 transmit_plain_ping (struct NeighbourList *n)
2189 struct ValidationEntry *ve;
2190 struct TransportPingMessage ping;
2191 struct ReadyList *rl;
2192 struct TransportPlugin *plugin;
2193 struct ForeignAddressList *fal;
2195 if (! n->public_key_valid)
2197 /* This should not happen since the other peer
2198 should send us a HELLO prior to sending his
2200 GNUNET_break_op (0);
2201 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2202 "Could not transmit plain PING to `%s': public key not known\n",
2203 GNUNET_i2s (&n->id));
2206 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2207 "Looking for addresses to transmit plain PING to `%s'\n",
2208 GNUNET_i2s (&n->id));
2209 for (rl = n->plugins; rl != NULL; rl = rl->next)
2211 plugin = rl->plugin;
2212 for (fal = rl->addresses; fal != NULL; fal = fal->next)
2214 if (! fal->connected)
2216 ve = GNUNET_malloc (sizeof (struct ValidationEntry));
2217 ve->transport_name = GNUNET_strdup (plugin->short_name);
2218 ve->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
2220 ve->send_time = GNUNET_TIME_absolute_get();
2221 ve->session = fal->session;
2222 memcpy(&ve->publicKey,
2224 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2225 ve->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
2226 &timeout_hello_validation,
2228 GNUNET_CONTAINER_multihashmap_put (validation_map,
2231 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2232 ping.header.size = htons(sizeof(struct TransportPingMessage));
2233 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
2234 ping.challenge = htonl(ve->challenge);
2235 memcpy(&ping.target, &n->id, sizeof(struct GNUNET_PeerIdentity));
2236 GNUNET_STATISTICS_update (stats,
2237 gettext_noop ("# PING without HELLO messages sent"),
2240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2241 "Transmitting plain PING to `%s'\n",
2242 GNUNET_i2s (&n->id));
2243 transmit_to_peer (NULL,
2245 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
2246 HELLO_VERIFICATION_TIMEOUT,
2247 (const char*) &ping, sizeof (ping),
2255 * Mark the given FAL entry as 'connected' (and hence preferred for
2256 * sending); also mark all others for the same peer as 'not connected'
2257 * (since only one can be preferred).
2259 * @param fal address to set to 'connected'
2262 mark_address_connected (struct ForeignAddressList *fal)
2264 struct ForeignAddressList *pos;
2267 GNUNET_assert (GNUNET_YES == fal->validated);
2268 if (fal->connected == GNUNET_YES)
2269 return; /* nothing to do */
2271 pos = fal->ready_list->addresses;
2274 if (GNUNET_YES == pos->connected)
2277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2278 "Marking address `%s' as no longer connected (due to connect on other address)\n",
2279 a2s (pos->ready_list->plugin->short_name,
2283 GNUNET_break (cnt == GNUNET_YES);
2285 pos->connected = GNUNET_NO;
2286 GNUNET_STATISTICS_update (stats,
2287 gettext_noop ("# connected addresses"),
2293 fal->connected = GNUNET_YES;
2294 if (GNUNET_YES == cnt)
2296 GNUNET_STATISTICS_update (stats,
2297 gettext_noop ("# connected addresses"),
2305 * Find an address in any of the available transports for
2306 * the given neighbour that would be good for message
2307 * transmission. This is essentially the transport selection
2310 * @param neighbour for whom to select an address
2311 * @return selected address, NULL if we have none
2313 struct ForeignAddressList *
2314 find_ready_address(struct NeighbourList *neighbour)
2316 struct ReadyList *head = neighbour->plugins;
2317 struct ForeignAddressList *addresses;
2318 struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
2319 struct ForeignAddressList *best_address;
2321 /* Hack to prefer unix domain sockets */
2322 struct ForeignAddressList *unix_address = NULL;
2324 best_address = NULL;
2325 while (head != NULL)
2327 addresses = head->addresses;
2328 while (addresses != NULL)
2330 if ( (addresses->timeout.abs_value < now.abs_value) &&
2331 (addresses->connected == GNUNET_YES) )
2334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2335 "Marking long-time inactive connection to `%4s' as down.\n",
2336 GNUNET_i2s (&neighbour->id));
2338 GNUNET_STATISTICS_update (stats,
2339 gettext_noop ("# connected addresses"),
2342 addresses->connected = GNUNET_NO;
2344 addresses = addresses->next;
2347 addresses = head->addresses;
2348 while (addresses != NULL)
2351 if (addresses->addr != NULL)
2352 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2353 "Have address `%s' for peer `%4s' (status: %d, %d, %d, %u, %llums, %u)\n",
2354 a2s (head->plugin->short_name,
2356 addresses->addrlen),
2357 GNUNET_i2s (&neighbour->id),
2358 addresses->connected,
2359 addresses->in_transmit,
2360 addresses->validated,
2361 addresses->connect_attempts,
2362 (unsigned long long) addresses->timeout.abs_value,
2363 (unsigned int) addresses->distance);
2365 if (0==strcmp(head->plugin->short_name,"unix"))
2367 if ( (unix_address == NULL) ||
2368 ( (unix_address != NULL) &&
2369 (addresses->latency.rel_value < unix_address->latency.rel_value) ) )
2370 unix_address = addresses;
2372 if ( ( (best_address == NULL) ||
2373 (addresses->connected == GNUNET_YES) ||
2374 (best_address->connected == GNUNET_NO) ) &&
2375 (addresses->in_transmit == GNUNET_NO) &&
2376 ( (best_address == NULL) ||
2377 (addresses->latency.rel_value < best_address->latency.rel_value)) )
2378 best_address = addresses;
2379 /* FIXME: also give lower-latency addresses that are not
2380 connected a chance some times... */
2381 addresses = addresses->next;
2383 if (unix_address != NULL)
2387 if (unix_address != NULL)
2389 best_address = unix_address;
2391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2392 "Found UNIX address, forced this address\n");
2395 if (best_address != NULL)
2398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2399 "Best address found (`%s') has latency of %llu ms.\n",
2400 (best_address->addrlen > 0)
2401 ? a2s (best_address->ready_list->plugin->short_name,
2403 best_address->addrlen)
2405 best_address->latency.rel_value);
2410 GNUNET_STATISTICS_update (stats,
2411 gettext_noop ("# transmission attempts failed (no address)"),
2416 return best_address;
2424 struct GeneratorContext
2426 struct TransportPlugin *plug_pos;
2427 struct OwnAddressList *addr_pos;
2428 struct GNUNET_TIME_Absolute expiration;
2436 address_generator (void *cls, size_t max, void *buf)
2438 struct GeneratorContext *gc = cls;
2441 while ((gc->addr_pos == NULL) && (gc->plug_pos != NULL))
2443 gc->plug_pos = gc->plug_pos->next;
2444 gc->addr_pos = (gc->plug_pos != NULL) ? gc->plug_pos->addresses : NULL;
2446 if (NULL == gc->plug_pos)
2451 ret = GNUNET_HELLO_add_address (gc->plug_pos->short_name,
2454 gc->addr_pos->addrlen, buf, max);
2455 gc->addr_pos = gc->addr_pos->next;
2461 * Construct our HELLO message from all of the addresses of
2462 * all of the transports.
2465 * @param tc scheduler context
2468 refresh_hello_task (void *cls,
2469 const struct GNUNET_SCHEDULER_TaskContext *tc)
2471 struct GNUNET_HELLO_Message *hello;
2472 struct TransportClient *cpos;
2473 struct NeighbourList *npos;
2474 struct GeneratorContext gc;
2476 hello_task = GNUNET_SCHEDULER_NO_TASK;
2477 gc.plug_pos = plugins;
2478 gc.addr_pos = plugins != NULL ? plugins->addresses : NULL;
2479 gc.expiration = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
2480 hello = GNUNET_HELLO_create (&my_public_key, &address_generator, &gc);
2482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2483 "Refreshed my `%s', new size is %d\n", "HELLO", GNUNET_HELLO_size(hello));
2485 GNUNET_STATISTICS_update (stats,
2486 gettext_noop ("# refreshed my HELLO"),
2490 while (cpos != NULL)
2492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2493 "Transmitting my HELLO to client!\n");
2494 transmit_to_client (cpos,
2495 (const struct GNUNET_MessageHeader *) hello,
2500 GNUNET_free_non_null (our_hello);
2502 GNUNET_PEERINFO_add_peer (peerinfo, our_hello);
2503 for (npos = neighbours; npos != NULL; npos = npos->next)
2505 if (! npos->received_pong)
2508 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2509 "Transmitting updated `%s' to neighbour `%4s'\n",
2510 "HELLO", GNUNET_i2s (&npos->id));
2512 GNUNET_STATISTICS_update (stats,
2513 gettext_noop ("# transmitted my HELLO to other peers"),
2516 transmit_to_peer (NULL, NULL, 0,
2517 HELLO_ADDRESS_EXPIRATION,
2518 (const char *) our_hello,
2519 GNUNET_HELLO_size(our_hello),
2526 * Schedule task to refresh hello (unless such a
2527 * task exists already).
2532 #if DEBUG_TRANSPORT_HELLO
2533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2534 "refresh_hello() called!\n");
2536 if (hello_task != GNUNET_SCHEDULER_NO_TASK)
2539 = GNUNET_SCHEDULER_add_now (&refresh_hello_task,
2545 * Iterator over hash map entries that NULLs the session of validation
2546 * entries that match the given session.
2548 * @param cls closure (the 'struct Session*' to match against)
2549 * @param key current key code (peer ID, not used)
2550 * @param value value in the hash map ('struct ValidationEntry*')
2551 * @return GNUNET_YES (we should continue to iterate)
2554 remove_session_validations (void *cls,
2555 const GNUNET_HashCode * key,
2558 struct Session *session = cls;
2559 struct ValidationEntry *ve = value;
2561 if (session == ve->session)
2568 * We've been disconnected from the other peer (for some
2569 * connection-oriented transport). Either quickly
2570 * re-establish the connection or signal the disconnect
2573 * Only signal CORE level disconnect if ALL addresses
2574 * for the peer are exhausted.
2576 * @param p overall plugin context
2577 * @param nl neighbour that was disconnected
2580 try_fast_reconnect (struct TransportPlugin *p,
2581 struct NeighbourList *nl)
2583 /* FIXME-MW: fast reconnect / transport switching not implemented... */
2584 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2585 "try_fast_reconnect not implemented!\n");
2586 /* Note: the idea here is to hide problems with transports (or
2587 switching between plugins) from the core to eliminate the need to
2588 re-negotiate session keys and the like; OTOH, we should tell core
2589 quickly (much faster than timeout) `if a connection was lost and
2590 could not be re-established (i.e. other peer went down or is
2591 unable / refuses to communicate);
2593 So we should consider:
2594 1) ideally: our own willingness / need to connect
2595 2) prior failures to connect to this peer (by plugin)
2596 3) ideally: reasons why other peer terminated (as far as knowable)
2598 Most importantly, it must be POSSIBLE for another peer to terminate
2599 a connection for a while (without us instantly re-establishing it).
2600 Similarly, if another peer is gone we should quickly notify CORE.
2601 OTOH, if there was a minor glitch (i.e. crash of gnunet-service-transport
2602 on the other end), we should reconnect in such a way that BOTH CORE
2603 services never even notice.
2604 Furthermore, the same mechanism (or small variation) could be used
2605 to switch to a better-performing plugin (ATS).
2607 Finally, this needs to be tested throughly... */
2610 * GNUNET_NO in the call below makes transport disconnect the peer,
2611 * even if only a single address (out of say, six) went away. This
2612 * function must be careful to ONLY disconnect if the peer is gone,
2613 * not just a specific address.
2615 * More specifically, half the places it was used had it WRONG.
2618 /* No reconnect, signal disconnect instead! */
2620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2621 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&nl->id),
2622 "try_fast_reconnect");
2624 GNUNET_STATISTICS_update (stats,
2625 gettext_noop ("# disconnects due to try_fast_reconnect"),
2629 disconnect_neighbour (nl, GNUNET_YES);
2635 * Function that will be called whenever the plugin internally
2636 * cleans up a session pointer and hence the service needs to
2637 * discard all of those sessions as well. Plugins that do not
2638 * use sessions can simply omit calling this function and always
2639 * use NULL wherever a session pointer is needed.
2641 * @param cls closure
2642 * @param peer which peer was the session for
2643 * @param session which session is being destoyed
2646 plugin_env_session_end (void *cls,
2647 const struct GNUNET_PeerIdentity *peer,
2648 struct Session *session)
2650 struct TransportPlugin *p = cls;
2651 struct NeighbourList *nl;
2652 struct ReadyList *rl;
2653 struct ForeignAddressList *pos;
2654 struct ForeignAddressList *prev;
2657 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2658 "Session ended with peer `%4s', %s\n",
2660 "plugin_env_session_end");
2662 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
2663 &remove_session_validations,
2665 nl = find_neighbour (peer);
2669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2670 "No neighbour record found for peer `%4s'\n",
2673 return; /* was never marked as connected */
2678 if (rl->plugin == p)
2685 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2686 "Plugin was associated with peer `%4s'\n",
2689 GNUNET_STATISTICS_update (stats,
2690 gettext_noop ("# disconnects due to session end"),
2693 disconnect_neighbour (nl, GNUNET_YES);
2697 pos = rl->addresses;
2698 while ( (pos != NULL) &&
2699 (pos->session != session) )
2707 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2708 "Session was never marked as ready for peer `%4s'\n",
2711 //FIXME: This conflicts with inbound tcp connections and tcp nat ... debugging in progress
2712 GNUNET_STATISTICS_update (stats,
2713 gettext_noop ("# disconnects due to unready session"),
2716 disconnect_neighbour (nl, GNUNET_YES);
2717 return; /* was never marked as connected */
2719 pos->session = NULL;
2720 pos->connected = GNUNET_NO;
2721 if (pos->addrlen != 0)
2723 if (nl->received_pong != GNUNET_NO)
2725 GNUNET_STATISTICS_update (stats,
2726 gettext_noop ("# try_fast_reconnect thanks to plugin_env_session_end"),
2729 if (GNUNET_YES == pos->connected)
2730 try_fast_reconnect (p, nl);
2734 GNUNET_STATISTICS_update (stats,
2735 gettext_noop ("# disconnects due to missing pong"),
2738 if (GNUNET_YES == pos->connected)
2739 disconnect_neighbour (nl, GNUNET_YES);
2743 /* was inbound connection, free 'pos' */
2745 rl->addresses = pos->next;
2747 prev->next = pos->next;
2748 if (GNUNET_SCHEDULER_NO_TASK != pos->revalidate_task)
2750 GNUNET_SCHEDULER_cancel (pos->revalidate_task);
2751 pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
2753 GNUNET_free_non_null(pos->ressources);
2754 GNUNET_free_non_null(pos->quality);
2755 if (GNUNET_YES != pos->connected)
2757 /* nothing else to do, connection was never up... */
2762 ats->stat.recreate_problem = GNUNET_YES;
2763 if (nl->received_pong == GNUNET_NO)
2765 GNUNET_STATISTICS_update (stats,
2766 gettext_noop ("# disconnects due to NO pong"),
2769 disconnect_neighbour (nl, GNUNET_YES);
2770 return; /* nothing to do, never connected... */
2772 /* check if we have any validated addresses left */
2773 pos = rl->addresses;
2776 if (GNUNET_YES == pos->validated)
2778 GNUNET_STATISTICS_update (stats,
2779 gettext_noop ("# try_fast_reconnect thanks to validated_address"),
2782 try_fast_reconnect (p, nl);
2787 /* no valid addresses left, signal disconnect! */
2790 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2791 "Disconnecting peer `%4s', %s\n",
2793 "plugin_env_session_end");
2795 /* FIXME: This doesn't mean there are no addresses left for this PEER,
2796 * it means there aren't any left for this PLUGIN/PEER combination! So
2797 * calling disconnect_neighbour here with GNUNET_NO forces disconnect
2798 * when it isn't necessary. Using GNUNET_YES at least checks to see
2799 * if there are any addresses that work first, so as not to overdo it.
2802 GNUNET_STATISTICS_update (stats,
2803 gettext_noop ("# disconnects due to plugin_env_session_end"),
2806 disconnect_neighbour (nl, GNUNET_YES);
2811 * Function that must be called by each plugin to notify the
2812 * transport service about the addresses under which the transport
2813 * provided by the plugin can be reached.
2815 * @param cls closure
2816 * @param add_remove GNUNET_YES to add, GNUNET_NO to remove the address
2817 * @param addr one of the addresses of the host, NULL for the last address
2818 * the specific address format depends on the transport
2819 * @param addrlen length of the address
2822 plugin_env_notify_address (void *cls,
2827 struct TransportPlugin *p = cls;
2828 struct OwnAddressList *al;
2829 struct OwnAddressList *prev;
2831 GNUNET_assert (p->api != NULL);
2833 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2834 (add_remove == GNUNET_YES)
2835 ? "Adding `%s':%s to the set of our addresses\n"
2836 : "Removing `%s':%s from the set of our addresses\n",
2841 GNUNET_assert (addr != NULL);
2842 if (GNUNET_NO == add_remove)
2848 if ( (addrlen == al->addrlen) &&
2849 (0 == memcmp (addr, &al[1], addrlen)) )
2852 p->addresses = al->next;
2854 prev->next = al->next;
2865 al = GNUNET_malloc (sizeof (struct OwnAddressList) + addrlen);
2866 al->next = p->addresses;
2868 al->addrlen = addrlen;
2869 memcpy (&al[1], addr, addrlen);
2875 * Notify all of our clients about a peer connecting.
2878 notify_clients_connect (const struct GNUNET_PeerIdentity *peer,
2879 struct GNUNET_TIME_Relative latency,
2882 struct ConnectInfoMessage * cim;
2883 struct TransportClient *cpos;
2887 if (0 == memcmp (peer,
2889 sizeof (struct GNUNET_PeerIdentity)))
2895 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2896 "Notifying clients about connection with `%s'\n",
2899 GNUNET_STATISTICS_update (stats,
2900 gettext_noop ("# peers connected"),
2905 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
2906 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
2910 cim = GNUNET_malloc (size);
2911 cim->header.size = htons (size);
2912 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
2913 cim->ats_count = htonl(2);
2914 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
2915 (&(cim->ats))[0].value = htonl (distance);
2916 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
2917 (&(cim->ats))[1].value = htonl ((uint32_t) latency.rel_value);
2918 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
2919 (&(cim->ats))[2].value = htonl (0);
2920 memcpy (&cim->id, peer, sizeof (struct GNUNET_PeerIdentity));
2922 /* notify ats about connecting peer */
2923 if (shutdown_in_progress == GNUNET_NO)
2924 ats_notify_peer_connect (peer, &(cim->ats), 2);
2927 while (cpos != NULL)
2929 transmit_to_client (cpos, &(cim->header), GNUNET_NO);
2938 * Notify all of our clients about a peer disconnecting.
2941 notify_clients_disconnect (const struct GNUNET_PeerIdentity *peer)
2943 struct DisconnectInfoMessage dim;
2944 struct TransportClient *cpos;
2946 if (0 == memcmp (peer,
2948 sizeof (struct GNUNET_PeerIdentity)))
2954 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2955 "Notifying clients about lost connection to `%s'\n",
2958 GNUNET_STATISTICS_update (stats,
2959 gettext_noop ("# peers connected"),
2962 dim.header.size = htons (sizeof (struct DisconnectInfoMessage));
2963 dim.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
2964 dim.reserved = htonl (0);
2965 memcpy (&dim.peer, peer, sizeof (struct GNUNET_PeerIdentity));
2967 /* notify ats about connecting peer */
2968 if (shutdown_in_progress == GNUNET_NO)
2969 ats_notify_peer_disconnect (peer);
2972 while (cpos != NULL)
2974 transmit_to_client (cpos, &dim.header, GNUNET_NO);
2981 * Find a ForeignAddressList entry for the given neighbour
2982 * that matches the given address and transport.
2984 * @param neighbour which peer we care about
2985 * @param tname name of the transport plugin
2986 * @param session session to look for, NULL for 'any'; otherwise
2987 * can be used for the service to "learn" this session ID
2989 * @param addr binary address
2990 * @param addrlen length of addr
2991 * @return NULL if no such entry exists
2993 static struct ForeignAddressList *
2994 find_peer_address(struct NeighbourList *neighbour,
2996 struct Session *session,
3000 struct ReadyList *head;
3001 struct ForeignAddressList *pos;
3003 head = neighbour->plugins;
3004 while (head != NULL)
3006 if (0 == strcmp (tname, head->plugin->short_name))
3012 pos = head->addresses;
3013 while ( (pos != NULL) &&
3014 ( (pos->addrlen != addrlen) ||
3015 (memcmp(pos->addr, addr, addrlen) != 0) ) )
3017 if ( (session != NULL) &&
3018 (pos->session == session) )
3022 if ( (session != NULL) && (pos != NULL) )
3023 pos->session = session; /* learn it! */
3029 * Get the peer address struct for the given neighbour and
3030 * address. If it doesn't yet exist, create it.
3032 * @param neighbour which peer we care about
3033 * @param tname name of the transport plugin
3034 * @param session session of the plugin, or NULL for none
3035 * @param addr binary address
3036 * @param addrlen length of addr
3037 * @return NULL if we do not have a transport plugin for 'tname'
3039 static struct ForeignAddressList *
3040 add_peer_address (struct NeighbourList *neighbour,
3042 struct Session *session,
3046 struct ReadyList *head;
3047 struct ForeignAddressList *ret;
3050 ret = find_peer_address (neighbour, tname, session, addr, addrlen);
3053 head = neighbour->plugins;
3055 while (head != NULL)
3057 if (0 == strcmp (tname, head->plugin->short_name))
3063 ret = GNUNET_malloc(sizeof(struct ForeignAddressList) + addrlen);
3064 ret->session = session;
3065 if ((addrlen > 0) && (addr != NULL))
3067 ret->addr = (const char*) &ret[1];
3068 memcpy (&ret[1], addr, addrlen);
3075 ret->ressources = GNUNET_malloc(available_ressources * sizeof (struct ATS_ressource_entry));
3076 for (c=0; c<available_ressources; c++)
3078 struct ATS_ressource_entry *r = ret->ressources;
3080 r[c].atis_index = ressources[c].atis_index;
3081 if (0 == strcmp(neighbour->plugins->plugin->short_name,"unix"))
3083 r[c].c = ressources[c].c_unix;
3085 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"udp"))
3087 r[c].c = ressources[c].c_udp;
3089 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"tcp"))
3091 r[c].c = ressources[c].c_tcp;
3093 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"http"))
3095 r[c].c = ressources[c].c_http;
3097 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"https"))
3099 r[c].c = ressources[c].c_https;
3101 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"wlan"))
3103 r[c].c = ressources[c].c_wlan;
3107 r[c].c = ressources[c].c_default;
3108 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3109 "Assigning default cost to peer `%s' addr plugin `%s'! This should not happen!\n",
3110 GNUNET_i2s(&neighbour->peer),
3111 neighbour->plugins->plugin->short_name);
3115 ret->quality = GNUNET_malloc (available_quality_metrics * sizeof (struct ATS_quality_entry));
3116 ret->addrlen = addrlen;
3117 ret->expires = GNUNET_TIME_relative_to_absolute
3118 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
3119 ret->latency = GNUNET_TIME_relative_get_forever();
3121 ret->timeout = GNUNET_TIME_relative_to_absolute
3122 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
3123 ret->ready_list = head;
3124 ret->next = head->addresses;
3125 head->addresses = ret;
3131 * Closure for 'add_validated_address'.
3133 struct AddValidatedAddressContext
3136 * Entry that has been validated.
3138 const struct ValidationEntry *ve;
3141 * Flag set after we have added the address so
3142 * that we terminate the iteration next time.
3149 * Callback function used to fill a buffer of max bytes with a list of
3150 * addresses in the format used by HELLOs. Should use
3151 * "GNUNET_HELLO_add_address" as a helper function.
3153 * @param cls the 'struct AddValidatedAddressContext' with the validated address
3154 * @param max maximum number of bytes that can be written to buf
3155 * @param buf where to write the address information
3156 * @return number of bytes written, 0 to signal the
3157 * end of the iteration.
3160 add_validated_address (void *cls,
3161 size_t max, void *buf)
3163 struct AddValidatedAddressContext *avac = cls;
3164 const struct ValidationEntry *ve = avac->ve;
3166 if (GNUNET_YES == avac->done)
3168 avac->done = GNUNET_YES;
3169 return GNUNET_HELLO_add_address (ve->transport_name,
3170 GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION),
3180 * Closure for 'check_address_exists'.
3182 struct CheckAddressExistsClosure
3185 * Address to check for.
3190 * Name of the transport.
3197 struct Session *session;
3200 * Set to GNUNET_YES if the address exists.
3213 * Iterator over hash map entries. Checks if the given
3214 * validation entry is for the same address as what is given
3217 * @param cls the 'struct CheckAddressExistsClosure*'
3218 * @param key current key code (ignored)
3219 * @param value value in the hash map ('struct ValidationEntry')
3220 * @return GNUNET_YES if we should continue to
3221 * iterate (mismatch), GNUNET_NO if not (entry matched)
3224 check_address_exists (void *cls,
3225 const GNUNET_HashCode * key,
3228 struct CheckAddressExistsClosure *caec = cls;
3229 struct ValidationEntry *ve = value;
3231 if ( (0 == strcmp (caec->tname,
3232 ve->transport_name)) &&
3233 (caec->addrlen == ve->addrlen) &&
3234 (0 == memcmp (caec->addr,
3238 caec->exists = GNUNET_YES;
3241 if ( (ve->session != NULL) &&
3242 (caec->session == ve->session) )
3244 caec->exists = GNUNET_YES;
3252 neighbour_timeout_task (void *cls,
3253 const struct GNUNET_SCHEDULER_TaskContext *tc)
3255 struct NeighbourList *n = cls;
3258 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
3259 "Neighbour `%4s' has timed out!\n", GNUNET_i2s (&n->id));
3261 GNUNET_STATISTICS_update (stats,
3262 gettext_noop ("# disconnects due to timeout"),
3265 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3266 disconnect_neighbour (n, GNUNET_NO);
3271 * Schedule the job that will cause us to send a PING to the
3272 * foreign address to evaluate its validity and latency.
3274 * @param fal address to PING
3277 schedule_next_ping (struct ForeignAddressList *fal);
3281 * Add the given address to the list of foreign addresses
3282 * available for the given peer (check for duplicates).
3284 * @param cls the respective 'struct NeighbourList' to update
3285 * @param tname name of the transport
3286 * @param expiration expiration time
3287 * @param addr the address
3288 * @param addrlen length of the address
3289 * @return GNUNET_OK (always)
3292 add_to_foreign_address_list (void *cls,
3294 struct GNUNET_TIME_Absolute expiration,
3298 struct NeighbourList *n = cls;
3299 struct ForeignAddressList *fal;
3302 GNUNET_STATISTICS_update (stats,
3303 gettext_noop ("# valid peer addresses returned by PEERINFO"),
3307 fal = find_peer_address (n, tname, NULL, addr, addrlen);
3310 #if DEBUG_TRANSPORT_HELLO
3311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3312 "Adding address `%s' (%s) for peer `%4s' due to PEERINFO data for %llums.\n",
3313 a2s (tname, addr, addrlen),
3315 GNUNET_i2s (&n->id),
3316 expiration.abs_value);
3318 fal = add_peer_address (n, tname, NULL, addr, addrlen);
3321 GNUNET_STATISTICS_update (stats,
3322 gettext_noop ("# previously validated addresses lacking transport"),
3328 fal->expires = GNUNET_TIME_absolute_max (expiration,
3330 schedule_next_ping (fal);
3336 fal->expires = GNUNET_TIME_absolute_max (expiration,
3342 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3343 "Failed to add new address for `%4s'\n",
3344 GNUNET_i2s (&n->id));
3348 if (fal->validated == GNUNET_NO)
3350 fal->validated = GNUNET_YES;
3351 GNUNET_STATISTICS_update (stats,
3352 gettext_noop ("# peer addresses considered valid"),
3356 if (try == GNUNET_YES)
3359 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3360 "Have new addresses, will try to trigger transmissions.\n");
3362 try_transmission_to_peer (n);
3369 * Add addresses in validated HELLO "h" to the set of addresses
3370 * we have for this peer.
3372 * @param cls closure ('struct NeighbourList*')
3373 * @param peer id of the peer, NULL for last call
3374 * @param h hello message for the peer (can be NULL)
3375 * @param err_msg NULL if successful, otherwise contains error message
3378 add_hello_for_peer (void *cls,
3379 const struct GNUNET_PeerIdentity *peer,
3380 const struct GNUNET_HELLO_Message *h,
3381 const char *err_msg)
3383 struct NeighbourList *n = cls;
3385 if (err_msg != NULL)
3388 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3389 _("Error in communication with PEERINFO service: %s\n"),
3396 GNUNET_STATISTICS_update (stats,
3397 gettext_noop ("# outstanding peerinfo iterate requests"),
3404 return; /* no HELLO available */
3406 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3407 "Peerinfo had `%s' message for peer `%4s', adding existing addresses.\n",
3411 if (GNUNET_YES != n->public_key_valid)
3413 GNUNET_HELLO_get_key (h, &n->publicKey);
3414 n->public_key_valid = GNUNET_YES;
3416 GNUNET_HELLO_iterate_addresses (h,
3418 &add_to_foreign_address_list,
3424 * Create a fresh entry in our neighbour list for the given peer.
3425 * Will try to transmit our current HELLO to the new neighbour.
3426 * Do not call this function directly, use 'setup_peer_check_blacklist.
3428 * @param peer the peer for which we create the entry
3429 * @param do_hello should we schedule transmitting a HELLO
3430 * @return the new neighbour list entry
3432 static struct NeighbourList *
3433 setup_new_neighbour (const struct GNUNET_PeerIdentity *peer,
3436 struct NeighbourList *n;
3437 struct TransportPlugin *tp;
3438 struct ReadyList *rl;
3440 GNUNET_assert (0 != memcmp (peer,
3442 sizeof (struct GNUNET_PeerIdentity)));
3444 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3445 "Setting up state for neighbour `%4s'\n",
3448 GNUNET_STATISTICS_update (stats,
3449 gettext_noop ("# active neighbours"),
3452 n = GNUNET_malloc (sizeof (struct NeighbourList));
3453 n->next = neighbours;
3457 GNUNET_TIME_relative_to_absolute
3458 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
3459 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
3460 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
3461 MAX_BANDWIDTH_CARRY_S);
3465 if ((tp->api->send != NULL) && (!is_blacklisted(peer, tp)))
3467 rl = GNUNET_malloc (sizeof (struct ReadyList));
3469 rl->next = n->plugins;
3472 rl->addresses = NULL;
3476 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
3478 n->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
3479 &neighbour_timeout_task, n);
3482 GNUNET_STATISTICS_update (stats,
3483 gettext_noop ("# peerinfo new neighbor iterate requests"),
3486 GNUNET_STATISTICS_update (stats,
3487 gettext_noop ("# outstanding peerinfo iterate requests"),
3490 n->piter = GNUNET_PEERINFO_iterate (peerinfo, peer,
3491 GNUNET_TIME_UNIT_FOREVER_REL,
3492 &add_hello_for_peer, n);
3494 GNUNET_STATISTICS_update (stats,
3495 gettext_noop ("# HELLO's sent to new neighbors"),
3498 if (NULL != our_hello)
3499 transmit_to_peer (NULL, NULL, 0,
3500 HELLO_ADDRESS_EXPIRATION,
3501 (const char *) our_hello, GNUNET_HELLO_size(our_hello),
3509 * Function called after we have checked if communicating
3510 * with a given peer is acceptable.
3512 * @param cls closure
3513 * @param n NULL if communication is not acceptable
3515 typedef void (*SetupContinuation)(void *cls,
3516 struct NeighbourList *n);
3520 * Information kept for each client registered to perform
3526 * This is a linked list.
3528 struct Blacklisters *next;
3531 * This is a linked list.
3533 struct Blacklisters *prev;
3536 * Client responsible for this entry.
3538 struct GNUNET_SERVER_Client *client;
3541 * Blacklist check that we're currently performing.
3543 struct BlacklistCheck *bc;
3549 * Head of DLL of blacklisting clients.
3551 static struct Blacklisters *bl_head;
3554 * Tail of DLL of blacklisting clients.
3556 static struct Blacklisters *bl_tail;
3560 * Context we use when performing a blacklist check.
3562 struct BlacklistCheck
3566 * This is a linked list.
3568 struct BlacklistCheck *next;
3571 * This is a linked list.
3573 struct BlacklistCheck *prev;
3576 * Peer being checked.
3578 struct GNUNET_PeerIdentity peer;
3581 * Option for setup neighbour afterwards.
3586 * Continuation to call with the result.
3588 SetupContinuation cont;
3596 * Current transmission request handle for this client, or NULL if no
3597 * request is pending.
3599 struct GNUNET_CONNECTION_TransmitHandle *th;
3602 * Our current position in the blacklisters list.
3604 struct Blacklisters *bl_pos;
3607 * Current task performing the check.
3609 GNUNET_SCHEDULER_TaskIdentifier task;
3614 * Head of DLL of active blacklisting queries.
3616 static struct BlacklistCheck *bc_head;
3619 * Tail of DLL of active blacklisting queries.
3621 static struct BlacklistCheck *bc_tail;
3625 * Perform next action in the blacklist check.
3627 * @param cls the 'struct BlacklistCheck*'
3631 do_blacklist_check (void *cls,
3632 const struct GNUNET_SCHEDULER_TaskContext *tc);
3635 * Transmit blacklist query to the client.
3637 * @param cls the 'struct BlacklistCheck'
3638 * @param size number of bytes allowed
3639 * @param buf where to copy the message
3640 * @return number of bytes copied to buf
3643 transmit_blacklist_message (void *cls,
3647 struct BlacklistCheck *bc = cls;
3648 struct Blacklisters *bl;
3649 struct BlacklistMessage bm;
3654 GNUNET_assert (bc->task == GNUNET_SCHEDULER_NO_TASK);
3655 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3657 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3658 "Failed to send blacklist test for peer `%s' to client\n",
3659 GNUNET_i2s (&bc->peer));
3663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3664 "Sending blacklist test for peer `%s' to client\n",
3665 GNUNET_i2s (&bc->peer));
3668 bm.header.size = htons (sizeof (struct BlacklistMessage));
3669 bm.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_QUERY);
3670 bm.is_allowed = htonl (0);
3672 memcpy (buf, &bm, sizeof (bm));
3673 GNUNET_SERVER_receive_done (bl->client, GNUNET_OK);
3679 * Perform next action in the blacklist check.
3681 * @param cls the 'struct BlacklistCheck*'
3685 do_blacklist_check (void *cls,
3686 const struct GNUNET_SCHEDULER_TaskContext *tc)
3688 struct BlacklistCheck *bc = cls;
3689 struct Blacklisters *bl;
3691 bc->task = GNUNET_SCHEDULER_NO_TASK;
3696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3697 "No blacklist clients active, will now setup neighbour record for peer `%s'\n",
3698 GNUNET_i2s (&bc->peer));
3700 bc->cont (bc->cont_cls,
3701 setup_new_neighbour (&bc->peer, bc->do_hello));
3708 bc->th = GNUNET_SERVER_notify_transmit_ready (bl->client,
3709 sizeof (struct BlacklistMessage),
3710 GNUNET_TIME_UNIT_FOREVER_REL,
3711 &transmit_blacklist_message,
3718 * Obtain a 'struct NeighbourList' for the given peer. If such an entry
3719 * does not yet exist, check the blacklist. If the blacklist says creating
3720 * one is acceptable, create one and call the continuation; otherwise
3721 * call the continuation with NULL.
3723 * @param peer peer to setup or look up a struct NeighbourList for
3724 * @param do_hello should we also schedule sending our HELLO to the peer
3725 * if this is a new record
3726 * @param cont function to call with the 'struct NeigbhbourList*'
3727 * @param cont_cls closure for cont
3730 setup_peer_check_blacklist (const struct GNUNET_PeerIdentity *peer,
3732 SetupContinuation cont,
3735 struct NeighbourList *n;
3736 struct BlacklistCheck *bc;
3738 n = find_neighbour(peer);
3742 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3743 "Neighbour record exists for peer `%s'\n",
3750 if (bl_head == NULL)
3753 cont (cont_cls, setup_new_neighbour (peer, do_hello));
3755 setup_new_neighbour(peer, do_hello);
3758 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3759 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3761 bc->do_hello = do_hello;
3763 bc->cont_cls = cont_cls;
3764 bc->bl_pos = bl_head;
3765 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3771 * Function called with the result of querying a new blacklister about
3772 * it being allowed (or not) to continue to talk to an existing neighbour.
3774 * @param cls the original 'struct NeighbourList'
3775 * @param n NULL if we need to disconnect
3778 confirm_or_drop_neighbour (void *cls,
3779 struct NeighbourList *n)
3781 struct NeighbourList * orig = cls;
3786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3787 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&orig->id),
3788 "confirm_or_drop_neighboUr");
3790 GNUNET_STATISTICS_update (stats,
3791 gettext_noop ("# disconnects due to blacklist"),
3794 disconnect_neighbour (orig, GNUNET_NO);
3800 * Handle a request to start a blacklist.
3802 * @param cls closure (always NULL)
3803 * @param client identification of the client
3804 * @param message the actual message
3807 handle_blacklist_init (void *cls,
3808 struct GNUNET_SERVER_Client *client,
3809 const struct GNUNET_MessageHeader *message)
3811 struct Blacklisters *bl;
3812 struct BlacklistCheck *bc;
3813 struct NeighbourList *n;
3818 if (bl->client == client)
3821 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3826 bl = GNUNET_malloc (sizeof (struct Blacklisters));
3827 bl->client = client;
3828 GNUNET_SERVER_client_keep (client);
3829 GNUNET_CONTAINER_DLL_insert_after (bl_head, bl_tail, bl_tail, bl);
3830 /* confirm that all existing connections are OK! */
3834 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3835 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3837 bc->do_hello = GNUNET_NO;
3838 bc->cont = &confirm_or_drop_neighbour;
3841 if (n == neighbours) /* all would wait for the same client, no need to
3842 create more than just the first task right now */
3843 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3851 * Handle a request to blacklist a peer.
3853 * @param cls closure (always NULL)
3854 * @param client identification of the client
3855 * @param message the actual message
3858 handle_blacklist_reply (void *cls,
3859 struct GNUNET_SERVER_Client *client,
3860 const struct GNUNET_MessageHeader *message)
3862 const struct BlacklistMessage *msg = (const struct BlacklistMessage*) message;
3863 struct Blacklisters *bl;
3864 struct BlacklistCheck *bc;
3867 while ( (bl != NULL) &&
3868 (bl->client != client) )
3873 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3874 "Blacklist client disconnected\n");
3876 /* FIXME: other error handling here!? */
3877 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3882 if (ntohl (msg->is_allowed) == GNUNET_SYSERR)
3885 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3886 "Blacklist check failed, peer not allowed\n");
3888 bc->cont (bc->cont_cls, NULL);
3889 GNUNET_CONTAINER_DLL_remove (bc_head, bc_tail, bc);
3895 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3896 "Blacklist check succeeded, continuing with checks\n");
3898 bc->bl_pos = bc->bl_pos->next;
3899 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3902 /* check if any other bc's are waiting for this blacklister */
3906 if ( (bc->bl_pos == bl) &&
3907 (GNUNET_SCHEDULER_NO_TASK == bc->task) )
3908 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3916 * Send periodic PING messages to a given foreign address.
3918 * @param cls our 'struct PeriodicValidationContext*'
3919 * @param tc task context
3922 send_periodic_ping (void *cls,
3923 const struct GNUNET_SCHEDULER_TaskContext *tc)
3925 struct ForeignAddressList *peer_address = cls;
3926 struct TransportPlugin *tp;
3927 struct ValidationEntry *va;
3928 struct NeighbourList *neighbour;
3929 struct TransportPingMessage ping;
3930 struct CheckAddressExistsClosure caec;
3932 uint16_t hello_size;
3936 peer_address->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
3937 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3939 tp = peer_address->ready_list->plugin;
3940 neighbour = peer_address->ready_list->neighbour;
3941 if (GNUNET_YES != neighbour->public_key_valid)
3943 /* no public key yet, try again later */
3944 schedule_next_ping (peer_address);
3947 caec.addr = peer_address->addr;
3948 caec.addrlen = peer_address->addrlen;
3949 caec.tname = tp->short_name;
3950 caec.session = peer_address->session;
3951 caec.exists = GNUNET_NO;
3952 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
3953 &check_address_exists,
3955 if (caec.exists == GNUNET_YES)
3957 /* During validation attempts we will likely trigger the other
3958 peer trying to validate our address which in turn will cause
3959 it to send us its HELLO, so we expect to hit this case rather
3960 frequently. Only print something if we are very verbose. */
3961 #if DEBUG_TRANSPORT > 1
3962 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3963 "Some validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
3964 (peer_address->addr != NULL)
3965 ? a2s (tp->short_name,
3967 peer_address->addrlen)
3970 GNUNET_i2s (&neighbour->id));
3972 schedule_next_ping (peer_address);
3975 va = GNUNET_malloc (sizeof (struct ValidationEntry) + peer_address->addrlen);
3976 va->transport_name = GNUNET_strdup (tp->short_name);
3977 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
3979 va->send_time = GNUNET_TIME_absolute_get();
3980 va->session = peer_address->session;
3981 if (peer_address->addr != NULL)
3983 va->addr = (const void*) &va[1];
3984 memcpy (&va[1], peer_address->addr, peer_address->addrlen);
3985 va->addrlen = peer_address->addrlen;
3987 memcpy(&va->publicKey,
3988 &neighbour->publicKey,
3989 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
3991 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
3992 &timeout_hello_validation,
3994 GNUNET_CONTAINER_multihashmap_put (validation_map,
3995 &neighbour->id.hashPubKey,
3997 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3999 if (peer_address->validated != GNUNET_YES)
4000 hello_size = GNUNET_HELLO_size(our_hello);
4004 tsize = sizeof(struct TransportPingMessage) + hello_size;
4006 if (peer_address->addr != NULL)
4008 slen = strlen (tp->short_name) + 1;
4009 tsize += slen + peer_address->addrlen;
4013 slen = 0; /* make gcc happy */
4015 message_buf = GNUNET_malloc(tsize);
4016 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
4017 ping.challenge = htonl(va->challenge);
4018 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
4019 if (peer_address->validated != GNUNET_YES)
4021 memcpy(message_buf, our_hello, hello_size);
4024 if (peer_address->addr != NULL)
4026 ping.header.size = htons(sizeof(struct TransportPingMessage) +
4027 peer_address->addrlen +
4029 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
4032 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
4034 peer_address->addrlen);
4038 ping.header.size = htons(sizeof(struct TransportPingMessage));
4041 memcpy(&message_buf[hello_size],
4043 sizeof(struct TransportPingMessage));
4045 #if DEBUG_TRANSPORT_REVALIDATION
4046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4047 "Performing re-validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s'\n",
4048 (peer_address->addr != NULL)
4049 ? a2s (peer_address->plugin->short_name,
4051 peer_address->addrlen)
4054 GNUNET_i2s (&neighbour->id),
4055 "HELLO", hello_size,
4058 if (peer_address->validated != GNUNET_YES)
4059 GNUNET_STATISTICS_update (stats,
4060 gettext_noop ("# PING with HELLO messages sent"),
4064 GNUNET_STATISTICS_update (stats,
4065 gettext_noop ("# PING without HELLO messages sent"),
4068 GNUNET_STATISTICS_update (stats,
4069 gettext_noop ("# PING messages sent for re-validation"),
4072 transmit_to_peer (NULL, peer_address,
4073 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
4074 HELLO_VERIFICATION_TIMEOUT,
4076 GNUNET_YES, neighbour);
4077 GNUNET_free(message_buf);
4078 schedule_next_ping (peer_address);
4083 * Schedule the job that will cause us to send a PING to the
4084 * foreign address to evaluate its validity and latency.
4086 * @param fal address to PING
4089 schedule_next_ping (struct ForeignAddressList *fal)
4091 struct GNUNET_TIME_Relative delay;
4093 if (fal->revalidate_task != GNUNET_SCHEDULER_NO_TASK)
4095 delay = GNUNET_TIME_absolute_get_remaining (fal->expires);
4096 delay.rel_value /= 2; /* do before expiration */
4097 delay = GNUNET_TIME_relative_min (delay,
4098 LATENCY_EVALUATION_MAX_DELAY);
4099 if (GNUNET_YES != fal->estimated)
4101 delay = GNUNET_TIME_UNIT_ZERO;
4102 fal->estimated = GNUNET_YES;
4104 if (GNUNET_YES == fal->connected)
4106 delay = GNUNET_TIME_relative_min (delay,
4107 CONNECTED_LATENCY_EVALUATION_MAX_DELAY);
4109 /* FIXME: also adjust delay based on how close the last
4110 observed latency is to the latency of the best alternative */
4111 /* bound how fast we can go */
4112 delay = GNUNET_TIME_relative_max (delay,
4113 GNUNET_TIME_UNIT_SECONDS);
4114 /* randomize a bit (to avoid doing all at the same time) */
4115 delay.rel_value += GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1000);
4116 fal->revalidate_task = GNUNET_SCHEDULER_add_delayed(delay,
4117 &send_periodic_ping,
4125 * Function that will be called if we receive some payload
4126 * from another peer.
4128 * @param message the payload
4129 * @param n peer who claimed to be the sender
4132 handle_payload_message (const struct GNUNET_MessageHeader *message,
4133 struct NeighbourList *n)
4135 struct InboundMessage *im;
4136 struct TransportClient *cpos;
4139 msize = ntohs (message->size);
4140 if (n->received_pong == GNUNET_NO)
4143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4144 "Received message of type %u and size %u from `%4s', but no pong yet!\n",
4145 ntohs (message->type),
4146 ntohs (message->size),
4147 GNUNET_i2s (&n->id));
4149 GNUNET_free_non_null (n->pre_connect_message_buffer);
4150 n->pre_connect_message_buffer = GNUNET_malloc (msize);
4151 memcpy (n->pre_connect_message_buffer, message, msize);
4156 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4157 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
4158 ntohs (message->type),
4159 ntohs (message->size),
4160 GNUNET_i2s (&n->id));
4162 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
4165 n->quota_violation_count++;
4167 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4168 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
4169 n->in_tracker.available_bytes_per_s__,
4170 n->quota_violation_count);
4172 /* Discount 32k per violation */
4173 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
4178 if (n->quota_violation_count > 0)
4180 /* try to add 32k back */
4181 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
4183 n->quota_violation_count--;
4186 GNUNET_STATISTICS_update (stats,
4187 gettext_noop ("# payload received from other peers"),
4190 /* transmit message to all clients */
4191 uint32_t ats_count = 2;
4192 size_t size = sizeof (struct InboundMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information) + msize;
4193 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
4196 im = GNUNET_malloc (size);
4197 im->header.size = htons (size);
4198 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
4200 im->ats_count = htonl(ats_count);
4201 /* Setting ATS data */
4202 (&(im->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
4203 (&(im->ats))[0].value = htonl (n->distance);
4204 (&(im->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4205 (&(im->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
4206 (&(im->ats))[ats_count].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
4207 (&(im->ats))[ats_count].value = htonl (0);
4209 memcpy (&((&(im->ats))[ats_count+1]), message, msize);
4211 while (cpos != NULL)
4213 transmit_to_client (cpos, &im->header, GNUNET_YES);
4221 * Iterator over hash map entries. Checks if the given validation
4222 * entry is for the same challenge as what is given in the PONG.
4224 * @param cls the 'struct TransportPongMessage*'
4225 * @param key peer identity
4226 * @param value value in the hash map ('struct ValidationEntry')
4227 * @return GNUNET_YES if we should continue to
4228 * iterate (mismatch), GNUNET_NO if not (entry matched)
4231 check_pending_validation (void *cls,
4232 const GNUNET_HashCode * key,
4235 const struct TransportPongMessage *pong = cls;
4236 struct ValidationEntry *ve = value;
4237 struct AddValidatedAddressContext avac;
4238 unsigned int challenge = ntohl(pong->challenge);
4239 struct GNUNET_HELLO_Message *hello;
4240 struct GNUNET_PeerIdentity target;
4241 struct NeighbourList *n;
4242 struct ForeignAddressList *fal;
4243 struct OwnAddressList *oal;
4244 struct TransportPlugin *tp;
4245 struct GNUNET_MessageHeader *prem;
4251 ps = ntohs (pong->header.size);
4252 if (ps < sizeof (struct TransportPongMessage))
4254 GNUNET_break_op (0);
4257 addr = (const char*) &pong[1];
4258 slen = strlen (ve->transport_name) + 1;
4259 if ( (ps - sizeof (struct TransportPongMessage) < slen) ||
4260 (ve->challenge != challenge) ||
4261 (addr[slen-1] != '\0') ||
4262 (0 != strcmp (addr, ve->transport_name)) ||
4263 (ntohl (pong->purpose.size)
4264 != sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
4266 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
4267 sizeof (struct GNUNET_PeerIdentity) + ps - sizeof (struct TransportPongMessage)) )
4272 alen = ps - sizeof (struct TransportPongMessage) - slen;
4273 switch (ntohl (pong->purpose.purpose))
4275 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN:
4276 if ( (ve->addrlen + slen != ntohl (pong->addrlen)) ||
4277 (0 != memcmp (&addr[slen],
4281 return GNUNET_YES; /* different entry, keep trying! */
4283 if (0 != memcmp (&pong->pid,
4285 sizeof (struct GNUNET_PeerIdentity)))
4287 GNUNET_break_op (0);
4291 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN,
4296 GNUNET_break_op (0);
4301 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4302 "Confirmed validity of address, peer `%4s' has address `%s' (%s).\n",
4304 a2s (ve->transport_name,
4305 (const struct sockaddr *) ve->addr,
4307 ve->transport_name);
4310 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING:
4311 if (0 != memcmp (&pong->pid,
4313 sizeof (struct GNUNET_PeerIdentity)))
4317 GNUNET_asprintf(&peer, "%s",GNUNET_i2s (&pong->pid));
4319 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4320 "Received PONG for different identity: I am `%s', PONG identity: `%s'\n",
4321 GNUNET_i2s (&my_identity),
4327 if (ve->addrlen != 0)
4329 /* must have been for a different validation entry */
4332 tp = find_transport (ve->transport_name);
4338 oal = tp->addresses;
4341 if ( (oal->addrlen == alen) &&
4342 (0 == memcmp (&oal[1],
4350 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4351 _("Not accepting PONG from `%s' with address `%s' since I cannot confirm using this address.\n"),
4352 GNUNET_i2s (&pong->pid),
4353 a2s (ve->transport_name,
4356 /* FIXME: since the sender of the PONG currently uses the
4357 wrong address (see FIMXE there!), we cannot run a
4358 proper check here... */
4364 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING,
4369 GNUNET_break_op (0);
4374 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4375 "Confirmed that peer `%4s' is talking to us using address `%s' (%s) for us.\n",
4377 a2s (ve->transport_name,
4380 ve->transport_name);
4384 GNUNET_break_op (0);
4387 if (GNUNET_TIME_absolute_get_remaining (GNUNET_TIME_absolute_ntoh (pong->expiration)).rel_value == 0)
4389 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4390 _("Received expired signature. Check system time.\n"));
4393 GNUNET_STATISTICS_update (stats,
4394 gettext_noop ("# address validation successes"),
4397 /* create the updated HELLO */
4398 GNUNET_CRYPTO_hash (&ve->publicKey,
4399 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4400 &target.hashPubKey);
4401 if (ve->addr != NULL)
4403 avac.done = GNUNET_NO;
4405 hello = GNUNET_HELLO_create (&ve->publicKey,
4406 &add_validated_address,
4408 GNUNET_PEERINFO_add_peer (peerinfo,
4410 GNUNET_free (hello);
4412 n = find_neighbour (&target);
4415 n->publicKey = ve->publicKey;
4416 n->public_key_valid = GNUNET_YES;
4417 fal = add_peer_address (n,
4422 GNUNET_assert (fal != NULL);
4423 fal->expires = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
4424 fal->validated = GNUNET_YES;
4425 mark_address_connected (fal);
4426 GNUNET_STATISTICS_update (stats,
4427 gettext_noop ("# peer addresses considered valid"),
4430 fal->latency = GNUNET_TIME_absolute_get_duration (ve->send_time);
4431 update_addr_value (fal, GNUNET_TIME_absolute_get_duration (ve->send_time).rel_value, GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4433 schedule_next_ping (fal);
4434 if (n->latency.rel_value == GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
4435 n->latency = fal->latency;
4437 n->latency.rel_value = (fal->latency.rel_value + n->latency.rel_value) / 2;
4439 n->distance = fal->distance;
4440 if (GNUNET_NO == n->received_pong)
4442 n->received_pong = GNUNET_YES;
4443 notify_clients_connect (&target, n->latency, n->distance);
4444 if (NULL != (prem = n->pre_connect_message_buffer))
4446 n->pre_connect_message_buffer = NULL;
4447 handle_payload_message (prem, n);
4451 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4453 GNUNET_SCHEDULER_cancel (n->retry_task);
4454 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4455 try_transmission_to_peer (n);
4459 /* clean up validation entry */
4460 GNUNET_assert (GNUNET_YES ==
4461 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4464 abort_validation (NULL, NULL, ve);
4470 * Function that will be called if we receive a validation
4471 * of an address challenge that we transmitted to another
4472 * peer. Note that the validation should only be considered
4473 * acceptable if the challenge matches AND if the sender
4474 * address is at least a plausible address for this peer
4475 * (otherwise we may be seeing a MiM attack).
4477 * @param cls closure
4478 * @param message the pong message
4479 * @param peer who responded to our challenge
4480 * @param sender_address string describing our sender address (as observed
4481 * by the other peer in binary format)
4482 * @param sender_address_len number of bytes in 'sender_address'
4485 handle_pong (void *cls, const struct GNUNET_MessageHeader *message,
4486 const struct GNUNET_PeerIdentity *peer,
4487 const char *sender_address,
4488 size_t sender_address_len)
4490 if (0 == memcmp (peer,
4492 sizeof (struct GNUNET_PeerIdentity)))
4494 /* PONG send to self, ignore */
4495 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4496 "Receiving `%s' message from myself\n",
4500 #if DEBUG_TRANSPORT > 1
4501 /* we get tons of these that just get discarded, only log
4502 if we are quite verbose */
4503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4504 "Receiving `%s' message from `%4s'.\n", "PONG",
4507 GNUNET_STATISTICS_update (stats,
4508 gettext_noop ("# PONG messages received"),
4511 if (GNUNET_SYSERR !=
4512 GNUNET_CONTAINER_multihashmap_get_multiple (validation_map,
4514 &check_pending_validation,
4517 /* This is *expected* to happen a lot since we send
4518 PONGs to *all* known addresses of the sender of
4519 the PING, so most likely we get multiple PONGs
4520 per PING, and all but the first PONG will end up
4521 here. So really we should not print anything here
4522 unless we want to be very, very verbose... */
4523 #if DEBUG_TRANSPORT > 2
4524 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4525 "Received `%s' message from `%4s' but have no record of a matching `%s' message. Ignoring.\n",
4537 * Try to validate a neighbour's address by sending him our HELLO and a PING.
4539 * @param cls the 'struct ValidationEntry*'
4540 * @param neighbour neighbour to validate, NULL if validation failed
4543 transmit_hello_and_ping (void *cls,
4544 struct NeighbourList *neighbour)
4546 struct ValidationEntry *va = cls;
4547 struct ForeignAddressList *peer_address;
4548 struct TransportPingMessage ping;
4549 uint16_t hello_size;
4552 struct GNUNET_PeerIdentity id;
4555 GNUNET_CRYPTO_hash (&va->publicKey,
4556 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4558 if (neighbour == NULL)
4560 /* FIXME: stats... */
4561 GNUNET_break (GNUNET_OK ==
4562 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4565 abort_validation (NULL, NULL, va);
4568 neighbour->publicKey = va->publicKey;
4569 neighbour->public_key_valid = GNUNET_YES;
4570 peer_address = add_peer_address (neighbour,
4571 va->transport_name, NULL,
4572 (const void*) &va[1],
4574 if (peer_address == NULL)
4576 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4577 "Failed to add peer `%4s' for plugin `%s'\n",
4578 GNUNET_i2s (&neighbour->id),
4579 va->transport_name);
4580 GNUNET_break (GNUNET_OK ==
4581 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4584 abort_validation (NULL, NULL, va);
4587 if (NULL == our_hello)
4588 refresh_hello_task (NULL, NULL);
4589 hello_size = GNUNET_HELLO_size(our_hello);
4590 slen = strlen(va->transport_name) + 1;
4591 tsize = sizeof(struct TransportPingMessage) + hello_size + va->addrlen + slen;
4592 message_buf = GNUNET_malloc(tsize);
4593 ping.challenge = htonl(va->challenge);
4594 ping.header.size = htons(sizeof(struct TransportPingMessage) + slen + va->addrlen);
4595 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
4596 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
4597 memcpy(message_buf, our_hello, hello_size);
4598 memcpy(&message_buf[hello_size],
4600 sizeof(struct TransportPingMessage));
4601 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
4604 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
4608 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4609 "Performing validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s' (%u bytes)\n",
4612 : a2s (va->transport_name,
4613 (const void*) &va[1], va->addrlen),
4615 GNUNET_i2s (&neighbour->id),
4616 "HELLO", hello_size,
4617 "PING", sizeof (struct TransportPingMessage) + va->addrlen + slen);
4620 GNUNET_STATISTICS_update (stats,
4621 gettext_noop ("# PING messages sent for initial validation"),
4624 transmit_to_peer (NULL, peer_address,
4625 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
4626 HELLO_VERIFICATION_TIMEOUT,
4628 GNUNET_YES, neighbour);
4629 GNUNET_free(message_buf);
4634 * Check if the given address is already being validated; if not,
4635 * append the given address to the list of entries that are being be
4636 * validated and initiate validation.
4638 * @param cls closure ('struct CheckHelloValidatedContext *')
4639 * @param tname name of the transport
4640 * @param expiration expiration time
4641 * @param addr the address
4642 * @param addrlen length of the address
4643 * @return GNUNET_OK (always)
4646 run_validation (void *cls,
4648 struct GNUNET_TIME_Absolute expiration,
4652 struct CheckHelloValidatedContext *chvc = cls;
4653 struct GNUNET_PeerIdentity id;
4654 struct TransportPlugin *tp;
4655 struct ValidationEntry *va;
4656 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4657 struct CheckAddressExistsClosure caec;
4658 struct OwnAddressList *oal;
4660 GNUNET_assert (addr != NULL);
4662 GNUNET_STATISTICS_update (stats,
4663 gettext_noop ("# peer addresses scheduled for validation"),
4666 tp = find_transport (tname);
4669 GNUNET_log (GNUNET_ERROR_TYPE_INFO |
4670 GNUNET_ERROR_TYPE_BULK,
4672 ("Transport `%s' not loaded, will not try to validate peer address using this transport.\n"),
4674 GNUNET_STATISTICS_update (stats,
4675 gettext_noop ("# peer addresses not validated (plugin not available)"),
4680 /* check if this is one of our own addresses */
4681 oal = tp->addresses;
4684 if ( (oal->addrlen == addrlen) &&
4685 (0 == memcmp (&oal[1],
4689 /* not plausible, this address is equivalent to our own address! */
4690 GNUNET_STATISTICS_update (stats,
4691 gettext_noop ("# peer addresses not validated (loopback)"),
4698 GNUNET_HELLO_get_key (chvc->hello, &pk);
4699 GNUNET_CRYPTO_hash (&pk,
4701 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4704 if (is_blacklisted(&id, tp))
4707 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4708 "Attempted to validate blacklisted peer `%s' using `%s'!\n",
4716 caec.addrlen = addrlen;
4717 caec.session = NULL;
4719 caec.exists = GNUNET_NO;
4720 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
4721 &check_address_exists,
4723 if (caec.exists == GNUNET_YES)
4725 /* During validation attempts we will likely trigger the other
4726 peer trying to validate our address which in turn will cause
4727 it to send us its HELLO, so we expect to hit this case rather
4728 frequently. Only print something if we are very verbose. */
4729 #if DEBUG_TRANSPORT > 1
4730 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4731 "Validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
4732 a2s (tname, addr, addrlen),
4736 GNUNET_STATISTICS_update (stats,
4737 gettext_noop ("# peer addresses not validated (in progress)"),
4742 va = GNUNET_malloc (sizeof (struct ValidationEntry) + addrlen);
4745 va->transport_name = GNUNET_strdup (tname);
4746 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
4748 va->send_time = GNUNET_TIME_absolute_get();
4749 va->addr = (const void*) &va[1];
4750 memcpy (&va[1], addr, addrlen);
4751 va->addrlen = addrlen;
4752 GNUNET_HELLO_get_key (chvc->hello,
4754 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
4755 &timeout_hello_validation,
4757 GNUNET_CONTAINER_multihashmap_put (validation_map,
4760 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4761 setup_peer_check_blacklist (&id, GNUNET_NO,
4762 &transmit_hello_and_ping,
4769 * Check if addresses in validated hello "h" overlap with
4770 * those in "chvc->hello" and validate the rest.
4772 * @param cls closure
4773 * @param peer id of the peer, NULL for last call
4774 * @param h hello message for the peer (can be NULL)
4775 * @param err_msg NULL if successful, otherwise contains error message
4778 check_hello_validated (void *cls,
4779 const struct GNUNET_PeerIdentity *peer,
4780 const struct GNUNET_HELLO_Message *h,
4781 const char *err_msg)
4783 struct CheckHelloValidatedContext *chvc = cls;
4784 struct GNUNET_HELLO_Message *plain_hello;
4785 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4786 struct GNUNET_PeerIdentity target;
4787 struct NeighbourList *n;
4789 if (err_msg != NULL)
4792 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4793 _("Error in communication with PEERINFO service: %s\n"),
4801 GNUNET_STATISTICS_update (stats,
4802 gettext_noop ("# outstanding peerinfo iterate requests"),
4806 if (GNUNET_NO == chvc->hello_known)
4808 /* notify PEERINFO about the peer now, so that we at least
4809 have the public key if some other component needs it */
4810 GNUNET_HELLO_get_key (chvc->hello, &pk);
4811 GNUNET_CRYPTO_hash (&pk,
4812 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4813 &target.hashPubKey);
4814 plain_hello = GNUNET_HELLO_create (&pk,
4817 GNUNET_PEERINFO_add_peer (peerinfo, plain_hello);
4818 GNUNET_free (plain_hello);
4819 #if DEBUG_TRANSPORT_HELLO
4820 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4821 "PEERINFO had no `%s' message for peer `%4s', full validation needed.\n",
4823 GNUNET_i2s (&target));
4825 GNUNET_STATISTICS_update (stats,
4826 gettext_noop ("# new HELLOs requiring full validation"),
4829 GNUNET_HELLO_iterate_addresses (chvc->hello,
4836 GNUNET_STATISTICS_update (stats,
4837 gettext_noop ("# duplicate HELLO (peer known)"),
4842 if (chvc->ve_count == 0)
4844 GNUNET_CONTAINER_DLL_remove (chvc_head,
4853 #if DEBUG_TRANSPORT_HELLO
4854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4855 "PEERINFO had `%s' message for peer `%4s', validating only new addresses.\n",
4859 chvc->hello_known = GNUNET_YES;
4860 n = find_neighbour (peer);
4863 #if DEBUG_TRANSPORT_HELLO
4864 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4865 "Calling hello_iterate_addresses for %s!\n",
4868 GNUNET_HELLO_iterate_addresses (h,
4870 &add_to_foreign_address_list,
4872 try_transmission_to_peer (n);
4876 #if DEBUG_TRANSPORT_HELLO
4877 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4878 "No existing neighbor record for %s!\n",
4881 GNUNET_STATISTICS_update (stats,
4882 gettext_noop ("# no existing neighbour record (validating HELLO)"),
4886 GNUNET_STATISTICS_update (stats,
4887 gettext_noop ("# HELLO validations (update case)"),
4890 GNUNET_HELLO_iterate_new_addresses (chvc->hello,
4892 GNUNET_TIME_relative_to_absolute (HELLO_REVALIDATION_START_TIME),
4899 * Process HELLO-message.
4901 * @param plugin transport involved, may be NULL
4902 * @param message the actual message
4903 * @return GNUNET_OK if the HELLO was well-formed, GNUNET_SYSERR otherwise
4906 process_hello (struct TransportPlugin *plugin,
4907 const struct GNUNET_MessageHeader *message)
4910 struct GNUNET_PeerIdentity target;
4911 const struct GNUNET_HELLO_Message *hello;
4912 struct CheckHelloValidatedContext *chvc;
4913 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
4914 struct NeighbourList *n;
4915 #if DEBUG_TRANSPORT_HELLO > 2
4919 hsize = ntohs (message->size);
4920 if ((ntohs (message->type) != GNUNET_MESSAGE_TYPE_HELLO) ||
4921 (hsize < sizeof (struct GNUNET_MessageHeader)))
4924 return GNUNET_SYSERR;
4926 GNUNET_STATISTICS_update (stats,
4927 gettext_noop ("# HELLOs received for validation"),
4931 hello = (const struct GNUNET_HELLO_Message *) message;
4932 if (GNUNET_OK != GNUNET_HELLO_get_key (hello, &publicKey))
4934 #if DEBUG_TRANSPORT_HELLO
4935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4936 "Unable to get public key from `%s' for `%4s'!\n",
4938 GNUNET_i2s (&target));
4940 GNUNET_break_op (0);
4941 return GNUNET_SYSERR;
4943 GNUNET_CRYPTO_hash (&publicKey,
4944 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4945 &target.hashPubKey);
4947 #if DEBUG_TRANSPORT_HELLO
4948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4949 "Received `%s' message for `%4s'\n",
4951 GNUNET_i2s (&target));
4953 if (0 == memcmp (&my_identity,
4955 sizeof (struct GNUNET_PeerIdentity)))
4957 GNUNET_STATISTICS_update (stats,
4958 gettext_noop ("# HELLOs ignored for validation (is my own HELLO)"),
4963 n = find_neighbour (&target);
4965 (! n->public_key_valid) )
4967 GNUNET_HELLO_get_key (hello, &n->publicKey);
4968 n->public_key_valid = GNUNET_YES;
4971 /* check if load is too high before doing expensive stuff */
4972 if (GNUNET_SCHEDULER_get_load (GNUNET_SCHEDULER_PRIORITY_BACKGROUND) > MAX_HELLO_LOAD)
4974 GNUNET_STATISTICS_update (stats,
4975 gettext_noop ("# HELLOs ignored due to high load"),
4978 #if DEBUG_TRANSPORT_HELLO
4979 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4980 "Ignoring `%s' for `%4s', load too high.\n",
4982 GNUNET_i2s (&target));
4989 while (NULL != chvc)
4991 if (GNUNET_HELLO_equals (hello,
4993 GNUNET_TIME_absolute_get ()).abs_value > 0)
4995 #if DEBUG_TRANSPORT_HELLO > 2
4996 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4997 "Received duplicate `%s' message for `%4s'; ignored\n",
4999 GNUNET_i2s (&target));
5001 return GNUNET_OK; /* validation already pending */
5003 if (GNUNET_HELLO_size (hello) == GNUNET_HELLO_size (chvc->hello))
5004 GNUNET_break (0 != memcmp (hello, chvc->hello,
5005 GNUNET_HELLO_size(hello)));
5010 struct NeighbourList *temp_neighbor = find_neighbour(&target);
5011 if ((NULL != temp_neighbor))
5013 fprintf(stderr, "Already know peer, ignoring hello\n");
5018 #if DEBUG_TRANSPORT_HELLO > 2
5021 my_id = GNUNET_strdup(GNUNET_i2s(plugin->env.my_identity));
5023 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5024 "%s: Starting validation of `%s' message for `%4s' via '%s' of size %u\n",
5027 GNUNET_i2s (&target),
5029 GNUNET_HELLO_size(hello));
5034 chvc = GNUNET_malloc (sizeof (struct CheckHelloValidatedContext) + hsize);
5036 chvc->hello = (const struct GNUNET_HELLO_Message *) &chvc[1];
5037 memcpy (&chvc[1], hello, hsize);
5038 GNUNET_CONTAINER_DLL_insert (chvc_head,
5041 /* finally, check if HELLO was previously validated
5042 (continuation will then schedule actual validation) */
5043 GNUNET_STATISTICS_update (stats,
5044 gettext_noop ("# peerinfo process hello iterate requests"),
5047 GNUNET_STATISTICS_update (stats,
5048 gettext_noop ("# outstanding peerinfo iterate requests"),
5051 chvc->piter = GNUNET_PEERINFO_iterate (peerinfo,
5053 HELLO_VERIFICATION_TIMEOUT,
5054 &check_hello_validated, chvc);
5060 * The peer specified by the given neighbour has timed-out or a plugin
5061 * has disconnected. We may either need to do nothing (other plugins
5062 * still up), or trigger a full disconnect and clean up. This
5063 * function updates our state and does the necessary notifications.
5064 * Also notifies our clients that the neighbour is now officially
5067 * @param n the neighbour list entry for the peer
5068 * @param check GNUNET_YES to check if ALL addresses for this peer
5069 * are gone, GNUNET_NO to force a disconnect of the peer
5070 * regardless of whether other addresses exist.
5073 disconnect_neighbour (struct NeighbourList *n, int check)
5075 struct ReadyList *rpos;
5076 struct NeighbourList *npos;
5077 struct NeighbourList *nprev;
5078 struct MessageQueue *mq;
5079 struct ForeignAddressList *peer_addresses;
5080 struct ForeignAddressList *peer_pos;
5082 if (GNUNET_YES == check)
5085 while (NULL != rpos)
5087 peer_addresses = rpos->addresses;
5088 while (peer_addresses != NULL)
5090 // Do not disconnect if: an address is connected or an inbound address exists
5091 if ((GNUNET_YES == peer_addresses->connected) || (peer_addresses->addrlen == 0))
5094 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5095 "NOT Disconnecting from `%4s', still have live address `%s'!\n",
5096 GNUNET_i2s (&n->id),
5097 a2s (peer_addresses->ready_list->plugin->short_name,
5098 peer_addresses->addr,
5099 peer_addresses->addrlen));
5101 return; /* still connected */
5103 peer_addresses = peer_addresses->next;
5109 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
5110 "Disconnecting from `%4s'\n",
5111 GNUNET_i2s (&n->id));
5113 /* remove n from neighbours list */
5116 while ((npos != NULL) && (npos != n))
5121 GNUNET_assert (npos != NULL);
5123 neighbours = n->next;
5125 nprev->next = n->next;
5127 /* notify all clients about disconnect */
5128 if (GNUNET_YES == n->received_pong)
5129 notify_clients_disconnect (&n->id);
5131 /* clean up all plugins, cancel connections and pending transmissions */
5132 while (NULL != (rpos = n->plugins))
5134 n->plugins = rpos->next;
5135 rpos->plugin->api->disconnect (rpos->plugin->api->cls, &n->id);
5136 while (rpos->addresses != NULL)
5138 peer_pos = rpos->addresses;
5139 rpos->addresses = peer_pos->next;
5140 if (peer_pos->connected == GNUNET_YES)
5141 GNUNET_STATISTICS_update (stats,
5142 gettext_noop ("# connected addresses"),
5145 if (GNUNET_YES == peer_pos->validated)
5146 GNUNET_STATISTICS_update (stats,
5147 gettext_noop ("# peer addresses considered valid"),
5150 if (GNUNET_SCHEDULER_NO_TASK != peer_pos->revalidate_task)
5152 GNUNET_SCHEDULER_cancel (peer_pos->revalidate_task);
5153 peer_pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
5155 GNUNET_free(peer_pos->ressources);
5156 peer_pos->ressources = NULL;
5157 GNUNET_free(peer_pos->quality);
5158 peer_pos->ressources = NULL;
5159 GNUNET_free(peer_pos);
5160 ats->stat.recreate_problem = GNUNET_YES;
5165 /* free all messages on the queue */
5166 while (NULL != (mq = n->messages_head))
5168 GNUNET_STATISTICS_update (stats,
5169 gettext_noop ("# bytes in message queue for other peers"),
5170 - (int64_t) mq->message_buf_size,
5172 GNUNET_STATISTICS_update (stats,
5173 gettext_noop ("# bytes discarded due to disconnect"),
5174 mq->message_buf_size,
5176 GNUNET_CONTAINER_DLL_remove (n->messages_head,
5179 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
5181 sizeof(struct GNUNET_PeerIdentity)));
5185 while (NULL != (mq = n->cont_head))
5188 GNUNET_CONTAINER_DLL_remove (n->cont_head,
5191 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
5193 sizeof(struct GNUNET_PeerIdentity)));
5197 if (n->timeout_task != GNUNET_SCHEDULER_NO_TASK)
5199 GNUNET_SCHEDULER_cancel (n->timeout_task);
5200 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
5202 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
5204 GNUNET_SCHEDULER_cancel (n->retry_task);
5205 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
5207 if (n->piter != NULL)
5209 GNUNET_PEERINFO_iterate_cancel (n->piter);
5210 GNUNET_STATISTICS_update (stats,
5211 gettext_noop ("# outstanding peerinfo iterate requests"),
5216 /* finally, free n itself */
5217 GNUNET_STATISTICS_update (stats,
5218 gettext_noop ("# active neighbours"),
5221 GNUNET_free_non_null (n->pre_connect_message_buffer);
5227 * We have received a PING message from someone. Need to send a PONG message
5228 * in response to the peer by any means necessary.
5231 handle_ping (void *cls, const struct GNUNET_MessageHeader *message,
5232 const struct GNUNET_PeerIdentity *peer,
5233 struct Session *session,
5234 const char *sender_address,
5235 uint16_t sender_address_len)
5237 struct TransportPlugin *plugin = cls;
5238 struct SessionHeader *session_header = (struct SessionHeader*) session;
5239 struct TransportPingMessage *ping;
5240 struct TransportPongMessage *pong;
5241 struct NeighbourList *n;
5242 struct ReadyList *rl;
5243 struct ForeignAddressList *fal;
5244 struct OwnAddressList *oal;
5250 if (ntohs (message->size) < sizeof (struct TransportPingMessage))
5252 GNUNET_break_op (0);
5253 return GNUNET_SYSERR;
5256 ping = (struct TransportPingMessage *) message;
5257 if (0 != memcmp (&ping->target,
5258 plugin->env.my_identity,
5259 sizeof (struct GNUNET_PeerIdentity)))
5262 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5263 _("Received `%s' message from `%s' destined for `%s' which is not me!\n"),
5265 (sender_address != NULL)
5266 ? a2s (plugin->short_name,
5267 (const struct sockaddr *)sender_address,
5270 GNUNET_i2s (&ping->target));
5272 return GNUNET_SYSERR;
5275 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
5276 "Processing `%s' from `%s'\n",
5278 (sender_address != NULL)
5279 ? a2s (plugin->short_name,
5280 (const struct sockaddr *)sender_address,
5284 GNUNET_STATISTICS_update (stats,
5285 gettext_noop ("# PING messages received"),
5288 addr = (const char*) &ping[1];
5289 alen = ntohs (message->size) - sizeof (struct TransportPingMessage);
5290 slen = strlen (plugin->short_name) + 1;
5293 /* peer wants to confirm that we have an outbound connection to him */
5294 if (session == NULL)
5296 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5297 _("Refusing to create PONG since I do not have a session with `%s'.\n"),
5299 return GNUNET_SYSERR;
5301 /* FIXME-urg: the use of 'sender_address' in the code below is doubly-wrong:
5302 1) it is NULL when we need to have a real value
5303 2) it is documented to be the address of the sender (source-IP), where
5304 what we actually want is our LISTEN IP (what we 'bound' to); which we don't even
5307 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5308 "Creating PONG indicating that we received a connection at our address `%s' from `%s'.\n",
5309 a2s (plugin->short_name,
5311 sender_address_len),
5314 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5315 pong->header.size = htons (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5316 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5317 pong->purpose.size =
5318 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5320 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5321 sizeof (struct GNUNET_PeerIdentity) + sender_address_len + slen);
5322 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING);
5323 pong->challenge = ping->challenge;
5324 pong->addrlen = htonl(sender_address_len + slen);
5327 sizeof(struct GNUNET_PeerIdentity));
5331 if ((sender_address!=NULL) && (sender_address_len > 0))
5332 memcpy (&((char*)&pong[1])[slen],
5334 sender_address_len);
5335 if (GNUNET_TIME_absolute_get_remaining (session_header->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4)
5337 /* create / update cached sig */
5339 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5340 "Creating PONG signature to indicate active connection.\n");
5342 session_header->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5343 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5344 GNUNET_assert (GNUNET_OK ==
5345 GNUNET_CRYPTO_rsa_sign (my_private_key,
5347 &session_header->pong_signature));
5351 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5353 memcpy (&pong->signature,
5354 &session_header->pong_signature,
5355 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5361 /* peer wants to confirm that this is one of our addresses */
5365 plugin->api->check_address (plugin->api->cls,
5369 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5370 _("Not confirming PING with address `%s' since I cannot confirm having this address.\n"),
5371 a2s (plugin->short_name,
5376 oal = plugin->addresses;
5379 if ( (oal->addrlen == alen) &&
5386 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + alen + slen);
5387 pong->header.size = htons (sizeof (struct TransportPongMessage) + alen + slen);
5388 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5389 pong->purpose.size =
5390 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5392 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5393 sizeof (struct GNUNET_PeerIdentity) + alen + slen);
5394 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN);
5395 pong->challenge = ping->challenge;
5396 pong->addrlen = htonl(alen + slen);
5399 sizeof(struct GNUNET_PeerIdentity));
5400 memcpy (&pong[1], plugin->short_name, slen);
5401 memcpy (&((char*)&pong[1])[slen], addr, alen);
5402 if ( (oal != NULL) &&
5403 (GNUNET_TIME_absolute_get_remaining (oal->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4) )
5405 /* create / update cached sig */
5407 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5408 "Creating PONG signature to indicate ownership.\n");
5410 oal->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5411 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5412 GNUNET_assert (GNUNET_OK ==
5413 GNUNET_CRYPTO_rsa_sign (my_private_key,
5415 &oal->pong_signature));
5416 memcpy (&pong->signature,
5417 &oal->pong_signature,
5418 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5420 else if (oal == NULL)
5422 /* not using cache (typically DV-only) */
5423 pong->expiration = GNUNET_TIME_absolute_hton (GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5424 GNUNET_assert (GNUNET_OK ==
5425 GNUNET_CRYPTO_rsa_sign (my_private_key,
5431 /* can used cached version */
5432 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5433 memcpy (&pong->signature,
5434 &oal->pong_signature,
5435 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5438 n = find_neighbour(peer);
5439 GNUNET_assert (n != NULL);
5440 did_pong = GNUNET_NO;
5441 /* first try reliable response transmission */
5445 fal = rl->addresses;
5448 if (-1 != rl->plugin->api->send (rl->plugin->api->cls,
5451 ntohs (pong->header.size),
5452 TRANSPORT_PONG_PRIORITY,
5453 HELLO_VERIFICATION_TIMEOUT,
5460 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5461 "Transmitted PONG to `%s' via reliable mechanism\n",
5464 GNUNET_STATISTICS_update (stats,
5465 gettext_noop ("# PONGs unicast via reliable transport"),
5471 did_pong = GNUNET_YES;
5476 /* no reliable method found, do multicast */
5477 GNUNET_STATISTICS_update (stats,
5478 gettext_noop ("# PONGs multicast to all available addresses"),
5484 fal = rl->addresses;
5487 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5488 "Transmitting PONG to `%s' via unreliable mechanism `%s':%s\n",
5490 a2s (rl->plugin->short_name,
5493 rl->plugin->short_name);
5494 transmit_to_peer(NULL, fal,
5495 TRANSPORT_PONG_PRIORITY,
5496 HELLO_VERIFICATION_TIMEOUT,
5498 ntohs(pong->header.size),
5501 did_pong = GNUNET_YES;
5507 if (GNUNET_YES != did_pong)
5508 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5509 _("Could not send PONG to `%s': no address available\n"),
5516 * Function called by the plugin for each received message. Update
5517 * data volumes, possibly notify plugins about reducing the rate at
5518 * which they read from the socket and generally forward to our
5521 * @param cls the "struct TransportPlugin *" we gave to the plugin
5522 * @param peer (claimed) identity of the other peer
5523 * @param message the message, NULL if we only care about
5524 * learning about the delay until we should receive again
5525 * @param ats_data information for automatic transport selection
5526 * @param ats_count number of elements in ats not including 0-terminator
5527 * @param session identifier used for this session (can be NULL)
5528 * @param sender_address binary address of the sender (if observed)
5529 * @param sender_address_len number of bytes in sender_address
5530 * @return how long in ms the plugin should wait until receiving more data
5531 * (plugins that do not support this, can ignore the return value)
5533 static struct GNUNET_TIME_Relative
5534 plugin_env_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
5535 const struct GNUNET_MessageHeader *message,
5536 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
5538 struct Session *session,
5539 const char *sender_address,
5540 uint16_t sender_address_len)
5542 struct TransportPlugin *plugin = cls;
5543 struct ReadyList *service_context;
5544 struct ForeignAddressList *peer_address;
5546 struct NeighbourList *n;
5547 struct GNUNET_TIME_Relative ret;
5551 if (0 == memcmp (peer,
5553 sizeof (struct GNUNET_PeerIdentity)))
5555 /* refuse to receive from myself */
5557 return GNUNET_TIME_UNIT_FOREVER_REL;
5559 if (is_blacklisted (peer, plugin))
5560 return GNUNET_TIME_UNIT_FOREVER_REL;
5561 n = find_neighbour (peer);
5563 n = setup_new_neighbour (peer, GNUNET_YES);
5564 service_context = n->plugins;
5565 while ((service_context != NULL) && (plugin != service_context->plugin))
5566 service_context = service_context->next;
5567 GNUNET_assert ((plugin->api->send == NULL) || (service_context != NULL));
5568 peer_address = NULL;
5571 for (c=0; c<ats_count; c++)
5572 if (ntohl(ats_data[c].type) == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
5573 distance = ntohl(ats_data[c].value);
5575 /* notify ATS about incoming data */
5576 //ats_notify_ats_data(peer, ats_data);
5578 if (message != NULL)
5580 if ( (session != NULL) ||
5581 (sender_address != NULL) )
5582 peer_address = add_peer_address (n,
5586 sender_address_len);
5587 if (peer_address != NULL)
5589 update_addr_ats(peer_address, ats_data, ats_count);
5590 update_addr_value(peer_address, distance, GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5592 peer_address->distance = distance;
5593 if (GNUNET_YES == peer_address->validated)
5594 mark_address_connected (peer_address);
5595 peer_address->timeout
5596 = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5597 schedule_next_ping (peer_address);
5599 /* update traffic received amount ... */
5600 msize = ntohs (message->size);
5602 GNUNET_STATISTICS_update (stats,
5603 gettext_noop ("# bytes received from other peers"),
5606 n->distance = distance;
5608 GNUNET_TIME_relative_to_absolute
5609 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5610 GNUNET_SCHEDULER_cancel (n->timeout_task);
5612 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
5613 &neighbour_timeout_task, n);
5614 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
5616 /* dropping message due to frequent inbound volume violations! */
5617 GNUNET_log (GNUNET_ERROR_TYPE_WARNING |
5618 GNUNET_ERROR_TYPE_BULK,
5620 ("Dropping incoming message due to repeated bandwidth quota (%u b/s) violations (total of %u).\n"),
5621 n->in_tracker.available_bytes_per_s__,
5622 n->quota_violation_count);
5623 GNUNET_STATISTICS_update (stats,
5624 gettext_noop ("# bandwidth quota violations by other peers"),
5627 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
5629 if ((ntohs(message->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_ATS) &&
5630 (ntohs(message->size) == (sizeof (struct GNUNET_MessageHeader) + sizeof (uint32_t))))
5632 uint32_t value = ntohl(*((uint32_t *) &message[1]));
5633 //GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "GNUNET_MESSAGE_TYPE_TRANSPORT_ATS: %i \n", value);
5634 /* Force ressource and quality update */
5637 ats->stat.modified_resources = GNUNET_YES;
5638 ats->stat.modified_quality = GNUNET_YES;
5640 /* Force cost update */
5642 ats->stat.modified_resources = GNUNET_YES;
5643 /* Force quality update */
5645 ats->stat.modified_quality = GNUNET_YES;
5646 /* Force full rebuild */
5648 ats->stat.recreate_problem = GNUNET_YES;
5652 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5653 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
5654 ntohs (message->type),
5655 ntohs (message->size),
5658 switch (ntohs (message->type))
5660 case GNUNET_MESSAGE_TYPE_HELLO:
5661 GNUNET_STATISTICS_update (stats,
5662 gettext_noop ("# HELLO messages received from other peers"),
5665 process_hello (plugin, message);
5667 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
5668 handle_ping (plugin, message, peer, session, sender_address, sender_address_len);
5669 if (! n->received_pong)
5670 transmit_plain_ping (n);
5672 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
5673 handle_pong (plugin, message, peer, sender_address, sender_address_len);
5675 case GNUNET_MESSAGE_TYPE_TRANSPORT_ATS:
5678 handle_payload_message (message, n);
5682 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 0);
5683 if (ret.rel_value > 0)
5686 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5687 "Throttling read (%llu bytes excess at %u b/s), waiting %llu ms before reading more.\n",
5688 (unsigned long long) n->in_tracker.consumption_since_last_update__,
5689 (unsigned int) n->in_tracker.available_bytes_per_s__,
5690 (unsigned long long) ret.rel_value);
5692 GNUNET_STATISTICS_update (stats,
5693 gettext_noop ("# ms throttling suggested"),
5694 (int64_t) ret.rel_value,
5701 * Handle START-message. This is the first message sent to us
5702 * by any client which causes us to add it to our list.
5704 * @param cls closure (always NULL)
5705 * @param client identification of the client
5706 * @param message the actual message
5709 handle_start (void *cls,
5710 struct GNUNET_SERVER_Client *client,
5711 const struct GNUNET_MessageHeader *message)
5713 const struct StartMessage *start;
5714 struct TransportClient *c;
5715 struct ConnectInfoMessage * cim;
5716 struct NeighbourList *n;
5720 start = (const struct StartMessage*) message;
5722 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5723 "Received `%s' request from client\n", "START");
5728 if (c->client == client)
5730 /* client already on our list! */
5732 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5737 if ( (GNUNET_NO != ntohl (start->do_check)) &&
5738 (0 != memcmp (&start->self,
5740 sizeof (struct GNUNET_PeerIdentity))) )
5742 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5743 _("Rejecting control connection from peer `%s', which is not me!\n"),
5744 GNUNET_i2s (&start->self));
5745 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5748 c = GNUNET_malloc (sizeof (struct TransportClient));
5752 if (our_hello != NULL)
5755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5756 "Sending our own `%s' to new client\n", "HELLO");
5758 transmit_to_client (c,
5759 (const struct GNUNET_MessageHeader *) our_hello,
5761 /* tell new client about all existing connections */
5763 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
5764 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
5768 cim = GNUNET_malloc (size);
5769 cim->header.size = htons (size);
5770 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
5771 cim->ats_count = htonl(ats_count);
5772 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
5773 (&(cim->ats))[2].value = htonl (0);
5777 if (GNUNET_YES == n->received_pong)
5779 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5780 (&(cim->ats))[0].value = htonl (n->distance);
5781 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
5782 (&(cim->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
5784 transmit_to_client (c, &cim->header, GNUNET_NO);
5792 #if DEBUG_TRANSPORT_HELLO
5793 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5794 "No HELLO created yet, will transmit HELLO to client later!\n");
5798 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5803 * Handle HELLO-message.
5805 * @param cls closure (always NULL)
5806 * @param client identification of the client
5807 * @param message the actual message
5810 handle_hello (void *cls,
5811 struct GNUNET_SERVER_Client *client,
5812 const struct GNUNET_MessageHeader *message)
5816 GNUNET_STATISTICS_update (stats,
5817 gettext_noop ("# HELLOs received from clients"),
5820 ret = process_hello (NULL, message);
5821 GNUNET_SERVER_receive_done (client, ret);
5826 * Closure for 'transmit_client_message'; followed by
5827 * 'msize' bytes of the actual message.
5829 struct TransmitClientMessageContext
5832 * Client on whom's behalf we are sending.
5834 struct GNUNET_SERVER_Client *client;
5837 * Timeout for the transmission.
5839 struct GNUNET_TIME_Absolute timeout;
5847 * Size of the message in bytes.
5854 * Schedule transmission of a message we got from a client to a peer.
5856 * @param cls the 'struct TransmitClientMessageContext*'
5857 * @param n destination, or NULL on error (in that case, drop the message)
5860 transmit_client_message (void *cls,
5861 struct NeighbourList *n)
5863 struct TransmitClientMessageContext *tcmc = cls;
5864 struct TransportClient *tc;
5867 while ((tc != NULL) && (tc->client != tcmc->client))
5872 transmit_to_peer (tc, NULL, tcmc->priority,
5873 GNUNET_TIME_absolute_get_remaining (tcmc->timeout),
5875 tcmc->msize, GNUNET_NO, n);
5877 GNUNET_SERVER_receive_done (tcmc->client, GNUNET_OK);
5878 GNUNET_SERVER_client_drop (tcmc->client);
5884 * Handle SEND-message.
5886 * @param cls closure (always NULL)
5887 * @param client identification of the client
5888 * @param message the actual message
5891 handle_send (void *cls,
5892 struct GNUNET_SERVER_Client *client,
5893 const struct GNUNET_MessageHeader *message)
5895 const struct OutboundMessage *obm;
5896 const struct GNUNET_MessageHeader *obmm;
5897 struct TransmitClientMessageContext *tcmc;
5901 size = ntohs (message->size);
5903 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
5906 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5909 GNUNET_STATISTICS_update (stats,
5910 gettext_noop ("# payload received for other peers"),
5913 obm = (const struct OutboundMessage *) message;
5914 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
5915 msize = size - sizeof (struct OutboundMessage);
5917 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5918 "Received `%s' request from client with target `%4s' and message of type %u and size %u\n",
5919 "SEND", GNUNET_i2s (&obm->peer),
5923 tcmc = GNUNET_malloc (sizeof (struct TransmitClientMessageContext) + msize);
5924 tcmc->client = client;
5925 tcmc->priority = ntohl (obm->priority);
5926 tcmc->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_ntoh (obm->timeout));
5927 tcmc->msize = msize;
5928 /* FIXME: this memcpy can be up to 7% of our total runtime */
5929 memcpy (&tcmc[1], obmm, msize);
5930 GNUNET_SERVER_client_keep (client);
5931 setup_peer_check_blacklist (&obm->peer, GNUNET_YES,
5932 &transmit_client_message,
5938 * Handle request connect message
5940 * @param cls closure (always NULL)
5941 * @param client identification of the client
5942 * @param message the actual message
5945 handle_request_connect (void *cls,
5946 struct GNUNET_SERVER_Client *client,
5947 const struct GNUNET_MessageHeader *message)
5949 const struct TransportRequestConnectMessage *trcm =
5950 (const struct TransportRequestConnectMessage *) message;
5952 GNUNET_STATISTICS_update (stats,
5953 gettext_noop ("# REQUEST CONNECT messages received"),
5957 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
5958 "Received a request connect message for peer `%s'\n",
5959 GNUNET_i2s(&trcm->peer));
5961 setup_peer_check_blacklist (&trcm->peer, GNUNET_YES,
5963 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5968 * Handle SET_QUOTA-message.
5970 * @param cls closure (always NULL)
5971 * @param client identification of the client
5972 * @param message the actual message
5975 handle_set_quota (void *cls,
5976 struct GNUNET_SERVER_Client *client,
5977 const struct GNUNET_MessageHeader *message)
5979 const struct QuotaSetMessage *qsm =
5980 (const struct QuotaSetMessage *) message;
5981 struct NeighbourList *n;
5983 GNUNET_STATISTICS_update (stats,
5984 gettext_noop ("# SET QUOTA messages received"),
5987 n = find_neighbour (&qsm->peer);
5990 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5991 GNUNET_STATISTICS_update (stats,
5992 gettext_noop ("# SET QUOTA messages ignored (no such peer)"),
5998 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5999 "Received `%s' request (new quota %u, old quota %u) from client for peer `%4s'\n",
6001 (unsigned int) ntohl (qsm->quota.value__),
6002 (unsigned int) n->in_tracker.available_bytes_per_s__,
6003 GNUNET_i2s (&qsm->peer));
6005 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker,
6007 if (0 == ntohl (qsm->quota.value__))
6010 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6011 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&n->id),
6014 GNUNET_STATISTICS_update (stats,
6015 gettext_noop ("# disconnects due to quota of 0"),
6018 disconnect_neighbour (n, GNUNET_NO);
6020 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6025 * Take the given address and append it to the set of results sent back to
6028 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
6029 * @param address the resolved name, NULL to indicate the last response
6032 transmit_address_to_client (void *cls, const char *address)
6034 struct GNUNET_SERVER_TransmitContext *tc = cls;
6037 if (NULL != address)
6039 slen = strlen (address) + 1;
6040 GNUNET_SERVER_transmit_context_append_data (tc, address, slen,
6041 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
6045 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
6051 * Handle AddressLookup-message.
6053 * @param cls closure (always NULL)
6054 * @param client identification of the client
6055 * @param message the actual message
6058 handle_address_lookup (void *cls,
6059 struct GNUNET_SERVER_Client *client,
6060 const struct GNUNET_MessageHeader *message)
6062 const struct AddressLookupMessage *alum;
6063 struct TransportPlugin *lsPlugin;
6064 const char *nameTransport;
6065 const char *address;
6067 struct GNUNET_SERVER_TransmitContext *tc;
6068 struct GNUNET_TIME_Absolute timeout;
6069 struct GNUNET_TIME_Relative rtimeout;
6072 size = ntohs (message->size);
6073 if (size < sizeof (struct AddressLookupMessage))
6075 GNUNET_break_op (0);
6076 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6079 alum = (const struct AddressLookupMessage *) message;
6080 uint32_t addressLen = ntohl (alum->addrlen);
6081 if (size <= sizeof (struct AddressLookupMessage) + addressLen)
6083 GNUNET_break_op (0);
6084 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6087 address = (const char *) &alum[1];
6088 nameTransport = (const char *) &address[addressLen];
6090 [size - sizeof (struct AddressLookupMessage) - addressLen - 1] != '\0')
6092 GNUNET_break_op (0);
6093 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6096 timeout = GNUNET_TIME_absolute_ntoh (alum->timeout);
6097 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
6098 numeric = ntohl (alum->numeric_only);
6099 lsPlugin = find_transport (nameTransport);
6100 if (NULL == lsPlugin)
6102 tc = GNUNET_SERVER_transmit_context_create (client);
6103 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
6104 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
6105 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
6108 GNUNET_SERVER_disable_receive_done_warning (client);
6109 tc = GNUNET_SERVER_transmit_context_create (client);
6110 lsPlugin->api->address_pretty_printer (lsPlugin->api->cls,
6112 address, addressLen,
6115 &transmit_address_to_client, tc);
6120 * Setup the environment for this plugin.
6123 create_environment (struct TransportPlugin *plug)
6125 plug->env.cfg = cfg;
6126 plug->env.my_identity = &my_identity;
6127 plug->env.our_hello = &our_hello;
6128 plug->env.cls = plug;
6129 plug->env.receive = &plugin_env_receive;
6130 plug->env.notify_address = &plugin_env_notify_address;
6131 plug->env.session_end = &plugin_env_session_end;
6132 plug->env.max_connections = max_connect_per_transport;
6133 plug->env.stats = stats;
6138 * Start the specified transport (load the plugin).
6141 start_transport (struct GNUNET_SERVER_Handle *server,
6144 struct TransportPlugin *plug;
6147 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6148 _("Loading `%s' transport plugin\n"), name);
6149 GNUNET_asprintf (&libname, "libgnunet_plugin_transport_%s", name);
6150 plug = GNUNET_malloc (sizeof (struct TransportPlugin));
6151 create_environment (plug);
6152 plug->short_name = GNUNET_strdup (name);
6153 plug->lib_name = libname;
6154 plug->next = plugins;
6156 plug->api = GNUNET_PLUGIN_load (libname, &plug->env);
6157 if (plug->api == NULL)
6159 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6160 _("Failed to load transport plugin for `%s'\n"), name);
6161 GNUNET_free (plug->short_name);
6162 plugins = plug->next;
6163 GNUNET_free (libname);
6170 * Called whenever a client is disconnected. Frees our
6171 * resources associated with that client.
6173 * @param cls closure
6174 * @param client identification of the client
6177 client_disconnect_notification (void *cls,
6178 struct GNUNET_SERVER_Client *client)
6180 struct TransportClient *pos;
6181 struct TransportClient *prev;
6182 struct ClientMessageQueueEntry *mqe;
6183 struct Blacklisters *bl;
6184 struct BlacklistCheck *bc;
6189 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
6190 "Client disconnected, cleaning up.\n");
6192 /* clean up blacklister */
6196 if (bl->client == client)
6201 if (bc->bl_pos == bl)
6203 bc->bl_pos = bl->next;
6206 GNUNET_CONNECTION_notify_transmit_ready_cancel (bc->th);
6209 if (bc->task == GNUNET_SCHEDULER_NO_TASK)
6210 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
6216 GNUNET_CONTAINER_DLL_remove (bl_head,
6219 GNUNET_SERVER_client_drop (bl->client);
6225 /* clean up 'normal' clients */
6228 while ((pos != NULL) && (pos->client != client))
6235 while (NULL != (mqe = pos->message_queue_head))
6237 GNUNET_CONTAINER_DLL_remove (pos->message_queue_head,
6238 pos->message_queue_tail,
6240 pos->message_count--;
6244 clients = pos->next;
6246 prev->next = pos->next;
6247 if (GNUNET_YES == pos->tcs_pending)
6252 if (pos->th != NULL)
6254 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
6257 GNUNET_break (0 == pos->message_count);
6263 * Function called when the service shuts down. Unloads our plugins
6264 * and cancels pending validations.
6266 * @param cls closure, unused
6267 * @param tc task context (unused)
6270 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6272 struct TransportPlugin *plug;
6273 struct TransportPlugin *tmp;
6274 struct OwnAddressList *al;
6275 struct CheckHelloValidatedContext *chvc;
6277 shutdown_in_progress = GNUNET_YES;
6278 while (neighbours != NULL)
6281 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6282 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&neighbours->id),
6285 disconnect_neighbour (neighbours, GNUNET_NO);
6288 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6289 "Transport service is unloading plugins...\n");
6292 while (plug != NULL)
6294 if (plug->address_update_task != GNUNET_SCHEDULER_NO_TASK)
6296 GNUNET_SCHEDULER_cancel (plug->address_update_task);
6297 plug->address_update_task = GNUNET_SCHEDULER_NO_TASK;
6299 GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
6300 GNUNET_free (plug->lib_name);
6301 GNUNET_free (plug->short_name);
6302 while (NULL != (al = plug->addresses))
6304 plug->addresses = al->next;
6311 if (my_private_key != NULL)
6312 GNUNET_CRYPTO_rsa_key_free (my_private_key);
6313 GNUNET_free_non_null (our_hello);
6315 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
6318 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6319 validation_map = NULL;
6323 /* free 'chvc' data structure */
6324 while (NULL != (chvc = chvc_head))
6326 chvc_head = chvc->next;
6327 if (chvc->piter != NULL)
6329 GNUNET_PEERINFO_iterate_cancel (chvc->piter);
6330 GNUNET_STATISTICS_update (stats,
6331 gettext_noop ("# outstanding peerinfo iterate requests"),
6338 GNUNET_assert (chvc->ve_count == 0);
6345 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6348 if (peerinfo != NULL)
6350 GNUNET_PEERINFO_disconnect (peerinfo);
6353 if (GNUNET_SCHEDULER_NO_TASK != hello_task)
6355 GNUNET_SCHEDULER_cancel (hello_task);
6356 hello_task = GNUNET_SCHEDULER_NO_TASK;
6358 /* Can we assume those are gone by now, or do we need to clean up
6360 GNUNET_break (bl_head == NULL);
6361 GNUNET_break (bc_head == NULL);
6365 static int ats_evaluate_results (int result, int solution, char * problem)
6367 int cont = GNUNET_NO;
6368 #if DEBUG_ATS || VERBOSE_ATS
6369 int error_kind = GNUNET_ERROR_TYPE_DEBUG;
6372 error_kind = GNUNET_ERROR_TYPE_ERROR;
6376 case GNUNET_SYSERR : /* GNUNET problem, not GLPK related */
6377 #if DEBUG_ATS || VERBOSE_ATS
6378 GNUNET_log (error_kind, "%s , GLPK solving not executed\n", problem);
6381 case GLP_ESTOP : /* search terminated by application */
6382 #if DEBUG_ATS || VERBOSE_ATS
6383 GNUNET_log (error_kind, "%s , Search terminated by application\n", problem);
6386 case GLP_EITLIM : /* iteration limit exceeded */
6387 #if DEBUG_ATS || VERBOSE_ATS
6388 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Iteration limit exceeded\n", problem);
6391 case GLP_ETMLIM : /* time limit exceeded */
6392 #if DEBUG_ATS || VERBOSE_ATS
6393 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Time limit exceeded\n", problem);
6396 case GLP_ENOPFS : /* no primal feasible solution */
6397 case GLP_ENODFS : /* no dual feasible solution */
6398 #if DEBUG_ATS || VERBOSE_ATS
6399 GNUNET_log (error_kind, "%s No feasible solution\n", problem);
6403 case GLP_EBADB : /* invalid basis */
6404 case GLP_ESING : /* singular matrix */
6405 case GLP_ECOND : /* ill-conditioned matrix */
6406 case GLP_EBOUND : /* invalid bounds */
6407 case GLP_EFAIL : /* solver failed */
6408 case GLP_EOBJLL : /* objective lower limit reached */
6409 case GLP_EOBJUL : /* objective upper limit reached */
6410 case GLP_EROOT : /* root LP optimum not provided */
6411 #if DEBUG_ATS || VERBOSE_ATS
6412 GNUNET_log (error_kind, "%s Invalid Input data: %i\n", problem, result);
6417 #if DEBUG_ATS || VERBOSE_ATS
6418 GNUNET_log (error_kind, "%s Problem has been solved\n", problem);
6425 #if DEBUG_ATS || VERBOSE_ATS
6426 GNUNET_log (error_kind, "%s solution is undefined\n", problem);
6430 #if DEBUG_ATS || VERBOSE_ATS
6431 GNUNET_log (error_kind, "%s solution is optimal\n", problem);
6436 #if DEBUG_ATS || VERBOSE_ATS
6437 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"));
6442 #if DEBUG_ATS || VERBOSE_ATS
6443 GNUNET_log (error_kind, "%s problem has no %sfeasible solution\n", problem, (0==strcmp(problem,"LP")?"":"integer "));
6447 #if DEBUG_ATS || VERBOSE_ATS
6448 GNUNET_log (error_kind, "%s problem is infeasible \n", problem);
6452 #if DEBUG_ATS || VERBOSE_ATS
6453 GNUNET_log (error_kind, "%s problem is unbounded \n", problem);
6461 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)
6463 int result = GNUNET_SYSERR;
6464 int lp_solution = GNUNET_SYSERR;
6465 int mlp_solution = GNUNET_SYSERR;
6469 glp_init_smcp(&opt_lp);
6471 opt_lp.msg_lev = GLP_MSG_ALL;
6473 opt_lp.msg_lev = GLP_MSG_OFF;
6476 // setting iteration limit
6477 opt_lp.it_lim = max_it;
6479 opt_lp.tm_lim = max_dur;
6481 if (ats->stat.recreate_problem == GNUNET_YES)
6482 opt_lp.presolve = GLP_ON;
6483 result = glp_simplex(ats->prob, &opt_lp);
6484 lp_solution = glp_get_status (ats->prob);
6486 if ((result == GLP_ETMLIM) || (result == GLP_EITLIM))
6488 ats->stat.valid = GNUNET_NO;
6489 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ATS exceeded time or iteration limit!\n");
6493 if (ats_evaluate_results(result, lp_solution, "LP") == GNUNET_YES)
6495 stat->valid = GNUNET_YES;
6499 ats->stat.simplex_rerun_required = GNUNET_YES;
6500 opt_lp.presolve = GLP_ON;
6501 result = glp_simplex(ats->prob, &opt_lp);
6502 lp_solution = glp_get_status (ats->prob);
6504 // TODO: Remove if this does not appear until release
6505 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "EXECUTED SIMPLEX WITH PRESOLVER! %i \n", lp_solution);
6507 if (ats_evaluate_results(result, lp_solution, "LP") != GNUNET_YES)
6509 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "After execution simplex with presolver: STILL INVALID!\n");
6511 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);
6512 glp_write_lp (ats->prob, NULL, filename);
6513 GNUNET_free (filename);
6514 stat->valid = GNUNET_NO;
6515 ats->stat.recreate_problem = GNUNET_YES;
6518 stat->valid = GNUNET_YES;
6523 glp_init_iocp(&opt_mlp);
6525 opt_mlp.tm_lim = max_dur;
6528 opt_mlp.msg_lev = GLP_MSG_ALL;
6530 opt_mlp.msg_lev = GLP_MSG_OFF;
6533 result = glp_intopt (ats->prob, &opt_mlp);
6534 mlp_solution = glp_mip_status (ats->prob);
6535 stat->solution = mlp_solution;
6537 if (ats_evaluate_results(result, mlp_solution, "MLP") == GNUNET_YES)
6539 stat->valid = GNUNET_YES;
6543 // TODO: Remove if this does not appear until release
6544 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "MLP solution for %i peers, %i mechs is invalid: %i\n", ats->stat.c_peers, ats->stat.c_mechs, mlp_solution);
6545 stat->valid = GNUNET_NO;
6550 int error = GNUNET_NO;
6552 struct ATS_mechanism *t = NULL;
6553 for (c=1; c<= (c_peers); c++ )
6556 t = peers[c].m_head;
6559 bw = glp_get_col_prim(prob, t->col_index);
6563 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);
6565 if (check ==GNUNET_YES)
6567 glp_write_sol(prob, "invalid_solution.mlp");
6568 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid solution, check invalid_solution.mlp");
6569 GNUNET_STATISTICS_update (stats, "ATS invalid solutions", 1, GNUNET_NO);
6572 if (check ==GNUNET_NO)
6580 if (glp_get_col_prim(ats->prob,2*c_mechs+1) != 1)
6583 for (c=1; c<= available_quality_metrics; c++ )
6585 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));
6587 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));
6588 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));
6589 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));
6590 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "objective value: %f\n", glp_mip_obj_val(ats->prob));
6595 static void ats_delete_problem ()
6598 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Deleting problem\n");
6602 for (c=0; c< (ats->stat).c_mechs; c++)
6603 GNUNET_free_non_null (ats->mechanisms[c].rc);
6606 if (ats->mechanisms!=NULL)
6608 GNUNET_free(ats->mechanisms);
6609 ats->mechanisms = NULL;
6612 if (ats->peers!=NULL)
6614 GNUNET_free(ats->peers);
6618 if (ats->prob != NULL)
6620 glp_delete_prob(ats->prob);
6624 ats->stat.begin_cr = GNUNET_SYSERR;
6625 ats->stat.begin_qm = GNUNET_SYSERR;
6626 ats->stat.c_mechs = 0;
6627 ats->stat.c_peers = 0;
6628 ats->stat.end_cr = GNUNET_SYSERR;
6629 ats->stat.end_qm = GNUNET_SYSERR;
6630 ats->stat.solution = GNUNET_SYSERR;
6631 ats->stat.valid = GNUNET_SYSERR;
6635 static void ats_update_problem_qm ()
6640 int c_q_metrics = available_quality_metrics;
6642 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6643 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6645 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6647 row_index = ats->stat.begin_qm;
6649 for (c=1; c <= c_q_metrics; c++)
6654 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6657 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6658 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6660 ja[array_index] = c2;
6662 GNUNET_assert (ats->mechanisms[c2].addr != NULL);
6663 GNUNET_assert (ats->mechanisms[c2].peer != NULL);
6665 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
6667 double v0 = 0, v1 = 0, v2 = 0;
6669 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6670 if (v1 < 1) v0 = 0.1;
6671 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6672 if (v1 < 1) v0 = 0.1;
6673 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6674 if (v1 < 1) v0 = 0.1;
6675 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
6678 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
6680 double v0 = 0, v1 = 0, v2 = 0;
6681 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6683 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6685 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6687 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
6689 value = (double) 10 / value;
6693 ar[array_index] = (ats->mechanisms[c2].peer->f) * value;
6695 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]);
6699 ja[array_index] = ats->stat.col_qm + c - 1;
6700 ar[array_index] = -1;
6703 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6705 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6711 GNUNET_free_non_null (ja);
6712 GNUNET_free_non_null (ar);
6716 static void ats_update_problem_cr ()
6722 double ct_max, ct_min;
6724 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6725 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6727 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6728 row_index = ats->stat.begin_cr;
6731 for (c=0; c<available_ressources; c++)
6733 ct_max = ressources[c].c_max;
6734 ct_min = ressources[c].c_min;
6736 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
6738 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
6740 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6744 GNUNET_assert (ats->mechanisms[c2].addr != NULL);
6745 GNUNET_assert (ats->mechanisms[c2].peer != NULL);
6747 ja[array_index] = c2;
6748 value = ats->mechanisms[c2].addr->ressources[c].c;
6749 ar[array_index] = value;
6751 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6755 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6761 GNUNET_free_non_null (ja);
6762 GNUNET_free_non_null (ar);
6767 static void ats_update_problem_qm_TEST ()
6772 int old_ja[ats->stat.c_mechs + 2];
6773 double old_ar[ats->stat.c_mechs + 2];
6777 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6778 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6780 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics TEST\n");
6782 if (ats->stat.begin_qm >0)
6783 row_index = ats->stat.begin_qm;
6788 for (c=0; c<available_quality_metrics; c++)
6791 c_old = glp_get_mat_row (ats->prob, row_index, old_ja, old_ar);
6793 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6795 for (c2=1; c2<=c_old; c2++)
6797 ja[c2] = old_ja[c2];
6798 if ((changed < 3) && (c2>2) && (old_ar[c2] != -1))
6800 ar[c2] = old_ar[c2] + 5 - changed;
6804 ar[c2] = old_ar[c2];
6806 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]);
6809 glp_set_mat_row (ats->prob, row_index, c_old, ja, ar);
6814 GNUNET_free_non_null (ja);
6815 GNUNET_free_non_null (ar);
6817 #endif //END: HAVE_LIBGLPK
6819 /** solve the bandwidth distribution problem
6820 * @param max_it maximum iterations
6821 * @param max_dur maximum duration in ms
6822 * @param D weight for diversity
6823 * @param U weight for utility
6824 * @param R weight for relativity
6825 * @param v_b_min minimal bandwidth per peer
6826 * @param v_n_min minimum number of connections
6827 * @param stat result struct
6828 * @return GNUNET_SYSERR if glpk is not available, number of mechanisms used
6830 static int ats_create_problem (double D, double U, double R, int v_b_min, int v_n_min, struct ATS_stat *stat)
6832 ats->prob = glp_create_prob();
6838 int c_c_ressources = available_ressources;
6839 int c_q_metrics = available_quality_metrics;
6841 double M = VERY_BIG_DOUBLE_VALUE;
6842 double Q[c_q_metrics+1];
6843 for (c=1; c<=c_q_metrics; c++)
6848 struct NeighbourList *next = neighbours;
6851 int found_addresses = GNUNET_NO;
6852 struct ReadyList *r_next = next->plugins;
6853 while (r_next != NULL)
6855 struct ForeignAddressList * a_next = r_next->addresses;
6856 while (a_next != NULL)
6859 found_addresses = GNUNET_YES;
6860 a_next = a_next->next;
6862 r_next = r_next->next;
6864 if (found_addresses) c_peers++;
6871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No addresses for bw distribution available\n", c_peers);
6873 stat->valid = GNUNET_NO;
6876 return GNUNET_SYSERR;
6879 GNUNET_assert (ats->mechanisms == NULL);
6880 ats->mechanisms = GNUNET_malloc((1+c_mechs) * sizeof (struct ATS_mechanism));
6881 GNUNET_assert (ats->peers == NULL);
6882 ats->peers = GNUNET_malloc((1+c_peers) * sizeof (struct ATS_peer));
6884 struct ATS_mechanism * mechanisms = ats->mechanisms;
6885 struct ATS_peer * peers = ats->peers;
6893 int found_addresses = GNUNET_NO;
6894 struct ReadyList *r_next = next->plugins;
6895 while (r_next != NULL)
6897 struct ForeignAddressList * a_next = r_next->addresses;
6898 while (a_next != NULL)
6900 if (found_addresses == GNUNET_NO)
6902 peers[c_peers].peer = next->id;
6903 peers[c_peers].m_head = NULL;
6904 peers[c_peers].m_tail = NULL;
6905 peers[c_peers].f = 1.0 / c_mechs;
6908 mechanisms[c_mechs].addr = a_next;
6909 mechanisms[c_mechs].col_index = c_mechs;
6910 mechanisms[c_mechs].peer = &peers[c_peers];
6911 mechanisms[c_mechs].next = NULL;
6912 mechanisms[c_mechs].plugin = r_next->plugin;
6914 GNUNET_CONTAINER_DLL_insert_tail(peers[c_peers].m_head, peers[c_peers].m_tail, &mechanisms[c_mechs]);
6915 found_addresses = GNUNET_YES;
6918 a_next = a_next->next;
6920 r_next = r_next->next;
6922 if (found_addresses == GNUNET_YES)
6929 if (v_n_min > c_peers)
6933 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);
6936 int size = 1 + 3 + 10 *c_mechs + c_peers + (c_q_metrics*c_mechs)+ c_q_metrics + c_c_ressources * c_mechs ;
6939 int * ia = GNUNET_malloc (size * sizeof (int));
6940 int * ja = GNUNET_malloc (size * sizeof (int));
6941 double * ar = GNUNET_malloc(size* sizeof (double));
6943 glp_set_prob_name(ats->prob, "gnunet ats bandwidth distribution");
6944 glp_set_obj_dir(ats->prob, GLP_MAX);
6946 /* adding columns */
6948 glp_add_cols(ats->prob, 2 * c_mechs);
6949 /* adding b_t cols */
6950 for (c=1; c <= c_mechs; c++)
6953 GNUNET_asprintf(&name, "p_%s_b%i",GNUNET_i2s(&(mechanisms[c].peer->peer)), c);
6954 glp_set_col_name(ats->prob, c, name);
6956 glp_set_col_bnds(ats->prob, c, GLP_LO, 0.0, 0.0);
6957 glp_set_col_kind(ats->prob, c, GLP_CV);
6958 glp_set_obj_coef(ats->prob, c, 0);
6961 /* adding n_t cols */
6962 for (c=c_mechs+1; c <= 2*c_mechs; c++)
6964 GNUNET_asprintf(&name, "p_%s_n%i",GNUNET_i2s(&(mechanisms[c-c_mechs].peer->peer)),(c-c_mechs));
6965 glp_set_col_name(ats->prob, c, name);
6967 glp_set_col_bnds(ats->prob, c, GLP_DB, 0.0, 1.0);
6968 glp_set_col_kind(ats->prob, c, GLP_IV);
6969 glp_set_obj_coef(ats->prob, c, 0);
6972 /* feasibility constraints */
6973 /* Constraint 1: one address per peer*/
6975 glp_add_rows(ats->prob, c_peers);
6976 for (c=1; c<=c_peers; c++)
6979 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6981 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 1.0, 1.0);
6983 struct ATS_mechanism *m = peers[c].m_head;
6986 ia[array_index] = row_index;
6987 ja[array_index] = (c_mechs + m->col_index);
6988 ar[array_index] = 1;
6990 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6998 /* Constraint 2: only active mechanism gets bandwidth assigned */
6999 glp_add_rows(ats->prob, c_mechs);
7000 for (c=1; c<=c_mechs; c++)
7002 /* b_t - n_t * M <= 0 */
7004 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
7006 glp_set_row_bnds(ats->prob, row_index, GLP_UP, 0.0, 0.0);
7008 ia[array_index] = row_index;
7009 ja[array_index] = mechanisms[c].col_index;
7010 ar[array_index] = 1;
7012 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7015 ia[array_index] = row_index;
7016 ja[array_index] = c_mechs + mechanisms[c].col_index;
7017 ar[array_index] = -M;
7019 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7025 /* Constraint 3: minimum bandwidth*/
7026 glp_add_rows(ats->prob, c_mechs);
7027 for (c=1; c<=c_mechs; c++)
7029 /* b_t - n_t * b_min <= 0 */
7031 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
7033 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
7035 ia[array_index] = row_index;
7036 ja[array_index] = mechanisms[c].col_index;
7037 ar[array_index] = 1;
7039 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7042 ia[array_index] = row_index;
7043 ja[array_index] = c_mechs + mechanisms[c].col_index;
7044 ar[array_index] = -v_b_min;
7046 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7052 /* Constraint 4: max ressource capacity */
7053 /* V cr: bt * ct_r <= cr_max
7055 glp_add_rows(ats->prob, available_ressources);
7056 double ct_max = VERY_BIG_DOUBLE_VALUE;
7057 double ct_min = 0.0;
7059 stat->begin_cr = array_index;
7061 for (c=0; c<available_ressources; c++)
7063 ct_max = ressources[c].c_max;
7064 ct_min = ressources[c].c_min;
7066 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
7068 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
7070 for (c2=1; c2<=c_mechs; c2++)
7073 ia[array_index] = row_index;
7074 ja[array_index] = c2;
7075 value = mechanisms[c2].addr->ressources[c].c;
7076 ar[array_index] = value;
7078 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7084 stat->end_cr = array_index--;
7086 /* Constraint 5: min number of connections*/
7087 glp_add_rows(ats->prob, 1);
7088 for (c=1; c<=c_mechs; c++)
7090 // b_t - n_t * b_min >= 0
7092 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
7094 glp_set_row_bnds(ats->prob, row_index, GLP_LO, v_n_min, 0.0);
7096 ia[array_index] = row_index;
7097 ja[array_index] = c_mechs + mechanisms[c].col_index;
7098 ar[array_index] = 1;
7100 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7106 // optimisation constraints
7110 // Constraint 6: optimize for diversity
7112 col_d = glp_add_cols(ats->prob, 1);
7113 stat->col_d = col_d;
7114 //GNUNET_assert (col_d == (2*c_mechs) + 1);
7115 glp_set_col_name(ats->prob, col_d, "d");
7116 glp_set_obj_coef(ats->prob, col_d, D);
7117 glp_set_col_bnds(ats->prob, col_d, GLP_LO, 0.0, 0.0);
7118 glp_add_rows(ats->prob, 1);
7120 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
7122 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
7123 for (c=1; c<=c_mechs; c++)
7125 ia[array_index] = row_index;
7126 ja[array_index] = c_mechs + mechanisms[c].col_index;
7127 ar[array_index] = 1;
7129 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7133 ia[array_index] = row_index;
7134 ja[array_index] = col_d;
7135 ar[array_index] = -1;
7137 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7143 // Constraint 7: optimize for quality
7145 col_qm = glp_add_cols(ats->prob, c_q_metrics);
7146 stat->col_qm = col_qm;
7147 //GNUNET_assert (col_qm == (2*c_mechs) + 3 + 1);
7148 for (c=0; c< c_q_metrics; c++)
7150 GNUNET_asprintf(&name, "Q_%s",qm[c].name);
7151 glp_set_col_name(ats->prob, col_qm + c, name);
7152 glp_set_col_bnds(ats->prob, col_qm + c, GLP_LO, 0.0, 0.0);
7154 glp_set_obj_coef(ats->prob, col_qm + c, Q[c]);
7156 glp_add_rows(ats->prob, available_quality_metrics);
7157 stat->begin_qm = row_index;
7158 for (c=1; c <= c_q_metrics; c++)
7161 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
7164 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
7165 for (c2=1; c2<=c_mechs; c2++)
7168 ia[array_index] = row_index;
7169 ja[array_index] = c2;
7170 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
7172 double v0 = 0, v1 = 0, v2 = 0;
7173 v0 = mechanisms[c2].addr->quality[c-1].values[0];
7174 if (v1 < 1) v0 = 0.1;
7175 v1 = mechanisms[c2].addr->quality[c-1].values[1];
7176 if (v1 < 1) v0 = 0.1;
7177 v2 = mechanisms[c2].addr->quality[c-1].values[2];
7178 if (v1 < 1) v0 = 0.1;
7179 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
7182 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
7184 double v0 = 0, v1 = 0, v2 = 0;
7185 v0 = mechanisms[c2].addr->quality[c-1].values[0];
7187 v1 = mechanisms[c2].addr->quality[c-1].values[1];
7189 v2 = mechanisms[c2].addr->quality[c-1].values[2];
7191 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
7193 value = (double) 10 / value;
7197 ar[array_index] = (mechanisms[c2].peer->f) * value ;
7199 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]);
7204 ia[array_index] = row_index;
7205 ja[array_index] = col_qm + c - 1;
7206 ar[array_index] = -1;
7208 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7213 stat->end_qm = row_index-1;
7215 // Constraint 8: optimize bandwidth utility
7217 col_u = glp_add_cols(ats->prob, 1);
7218 stat->col_u = col_u;
7219 //GNUNET_assert (col_u == (2*c_mechs) + 2);
7220 glp_set_col_name(ats->prob, col_u, "u");
7221 glp_set_obj_coef(ats->prob, col_u, U);
7222 glp_set_col_bnds(ats->prob, col_u, GLP_LO, 0.0, 0.0);
7223 glp_add_rows(ats->prob, 1);
7225 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
7227 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
7228 for (c=1; c<=c_mechs; c++)
7230 ia[array_index] = row_index;
7231 ja[array_index] = c;
7232 ar[array_index] = mechanisms[c].peer->f;
7234 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7238 ia[array_index] = row_index;
7239 ja[array_index] = col_u;
7240 ar[array_index] = -1;
7242 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7248 // Constraint 9: optimize relativity
7250 col_r = glp_add_cols(ats->prob, 1);
7251 stat->col_r = col_r;
7252 //GNUNET_assert (col_r == (2*c_mechs) + 3);
7253 glp_set_col_name(ats->prob, col_r, "r");
7254 glp_set_obj_coef(ats->prob, col_r, R);
7255 glp_set_col_bnds(ats->prob, col_r, GLP_LO, 0.0, 0.0);
7256 glp_add_rows(ats->prob, c_peers);
7257 for (c=1; c<=c_peers; c++)
7259 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
7261 struct ATS_mechanism *m = peers[c].m_head;
7264 ia[array_index] = row_index;
7265 ja[array_index] = m->col_index;
7266 ar[array_index] = 1 / mechanisms[c].peer->f;
7268 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7273 ia[array_index] = row_index;
7274 ja[array_index] = col_r;
7275 ar[array_index] = -1;
7277 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7284 /* Loading the matrix */
7285 glp_load_matrix(ats->prob, array_index-1, ia, ja, ar);
7287 stat->c_mechs = c_mechs;
7288 stat->c_peers = c_peers;
7290 stat->valid = GNUNET_YES;
7302 void ats_notify_ats_data (
7303 const struct GNUNET_PeerIdentity *peer,
7304 const struct GNUNET_TRANSPORT_ATS_Information *ats_data)
7307 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ATS_notify_ats_data: %s\n",GNUNET_i2s(peer));
7309 if (shutdown_in_progress == GNUNET_NO)
7310 ats_calculate_bandwidth_distribution();
7312 #endif //END: HAVE_LIBGLPK
7315 ats_calculate_bandwidth_distribution ()
7319 struct GNUNET_TIME_Absolute start;
7320 struct GNUNET_TIME_Relative creation;
7321 struct GNUNET_TIME_Relative solving;
7322 char *text = "unmodified";
7324 struct GNUNET_TIME_Relative delta = GNUNET_TIME_absolute_get_difference (ats->last, GNUNET_TIME_absolute_get());
7325 if (delta.rel_value < ats->min_delta.rel_value)
7328 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "Minimum time between cycles not reached\n");
7333 if (shutdown_in_progress == GNUNET_YES)
7336 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "Transport service is shutting down\n");
7343 if (INT_MAX < ats->max_exec_duration.rel_value)
7346 dur = (int) ats->max_exec_duration.rel_value;
7349 ats->stat.simplex_rerun_required = GNUNET_NO;
7350 start = GNUNET_TIME_absolute_get();
7351 if ((ats->stat.recreate_problem == GNUNET_YES) || (ats->prob==NULL) || (ats->stat.valid == GNUNET_NO))
7354 ats->stat.recreate_problem = GNUNET_YES;
7355 ats_delete_problem ();
7356 ats_create_problem (ats->D, ats->U, ats->R, ats->v_b_min, ats->v_n_min, &ats->stat);
7358 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);
7362 else if ((ats->stat.recreate_problem == GNUNET_NO) && (ats->stat.modified_resources == GNUNET_YES) && (ats->stat.valid == GNUNET_YES))
7364 text = "modified resources";
7365 ats_update_problem_cr();
7367 else if ((ats->stat.recreate_problem == GNUNET_NO) && (ats->stat.modified_quality == GNUNET_YES) && (ats->stat.valid == GNUNET_YES))
7369 text = "modified quality";
7370 ats_update_problem_qm();
7371 //ats_update_problem_qm_TEST ();
7375 else GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Problem is unmodified\n");
7378 creation = GNUNET_TIME_absolute_get_difference(start,GNUNET_TIME_absolute_get());
7379 start = GNUNET_TIME_absolute_get();
7381 ats->stat.solution = GLP_UNDEF;
7382 if (ats->stat.valid == GNUNET_YES)
7384 ats_solve_problem(ats->max_iterations, ats->max_exec_duration.rel_value, ats->stat.c_peers, ats->stat.c_mechs, &ats->stat);
7386 solving = GNUNET_TIME_absolute_get_difference(start,GNUNET_TIME_absolute_get());
7388 if (ats->stat.valid == GNUNET_YES)
7390 int msg_type = GNUNET_ERROR_TYPE_DEBUG;
7392 msg_type = GNUNET_ERROR_TYPE_ERROR;
7394 GNUNET_log (msg_type, "MLP %s: creation time: %llu, execution time: %llu, %i mechanisms, simplex rerun: %s, solution %s\n",
7395 text, creation.rel_value, solving.rel_value,
7397 (ats->stat.simplex_rerun_required == GNUNET_NO) ? "NO" : "YES", (ats->stat.solution == 5) ? "OPTIMAL" : "INVALID");
7398 ats->successful_executions ++;
7399 GNUNET_STATISTICS_set (stats, "# ATS successful executions", ats->successful_executions, GNUNET_NO);
7401 if ((ats->stat.recreate_problem == GNUNET_YES) || (ats->prob==NULL))
7402 GNUNET_STATISTICS_set (stats, "ATS state",ATS_NEW, GNUNET_NO);
7403 else if ((ats->stat.modified_resources == GNUNET_YES) &&
7404 (ats->stat.modified_quality == GNUNET_NO))
7405 GNUNET_STATISTICS_set (stats, "ATS state", ATS_C_UPDATED, GNUNET_NO);
7406 else if ((ats->stat.modified_resources == GNUNET_NO) &&
7407 (ats->stat.modified_quality == GNUNET_YES) &&
7408 (ats->stat.simplex_rerun_required == GNUNET_NO))
7409 GNUNET_STATISTICS_set (stats, "ATS state", ATS_Q_UPDATED, GNUNET_NO);
7410 else if ((ats->stat.modified_resources == GNUNET_YES) &&
7411 (ats->stat.modified_quality == GNUNET_YES) &&
7412 (ats->stat.simplex_rerun_required == GNUNET_NO))
7413 GNUNET_STATISTICS_set (stats, "ATS state", ATS_QC_UPDATED, GNUNET_NO);
7414 else if (ats->stat.simplex_rerun_required == GNUNET_NO)
7415 GNUNET_STATISTICS_set (stats, "ATS state", ATS_UNMODIFIED, GNUNET_NO);
7419 if (ats->stat.c_peers != 0)
7421 ats->invalid_executions ++;
7422 GNUNET_STATISTICS_set (stats, "# ATS invalid executions", ats->invalid_executions, GNUNET_NO);
7426 GNUNET_STATISTICS_set (stats, "# ATS successful executions", ats->successful_executions, GNUNET_NO);
7430 GNUNET_STATISTICS_set (stats, "ATS duration", solving.rel_value + creation.rel_value, GNUNET_NO);
7431 GNUNET_STATISTICS_set (stats, "ATS mechanisms", ats->stat.c_mechs, GNUNET_NO);
7432 GNUNET_STATISTICS_set (stats, "ATS peers", ats->stat.c_peers, GNUNET_NO);
7433 GNUNET_STATISTICS_set (stats, "ATS solution", ats->stat.solution, GNUNET_NO);
7434 GNUNET_STATISTICS_set (stats, "ATS timestamp", start.abs_value, GNUNET_NO);
7436 if ((ats->save_mlp == GNUNET_YES) && (ats->stat.c_mechs >= ats->dump_min_peers) && (ats->stat.c_mechs >= ats->dump_min_addr))
7439 if (ats->dump_overwrite == GNUNET_NO)
7441 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i_%s_%llu.mlp",
7442 ats->stat.c_peers, ats->stat.c_mechs, text, GNUNET_TIME_absolute_get().abs_value);
7443 glp_write_lp (ats->prob, NULL, filename);
7447 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i.mlp",
7448 ats->stat.c_peers, ats->stat.c_mechs );
7449 glp_write_lp (ats->prob, NULL, filename);
7451 GNUNET_free (filename);
7453 if ((ats->save_solution == GNUNET_YES) && (ats->stat.c_mechs >= ats->dump_min_peers) && (ats->stat.c_mechs >= ats->dump_min_addr))
7456 if (ats->dump_overwrite == GNUNET_NO)
7458 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i_%s_%llu.sol",
7459 ats->stat.c_peers, ats->stat.c_mechs, text, GNUNET_TIME_absolute_get().abs_value);
7460 glp_print_sol (ats->prob, filename);
7464 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i.sol",
7465 ats->stat.c_peers, ats->stat.c_mechs);
7466 glp_print_sol (ats->prob, filename);
7468 GNUNET_free (filename);
7471 ats->last = GNUNET_TIME_absolute_get();
7472 ats->stat.recreate_problem = GNUNET_NO;
7473 ats->stat.modified_resources = GNUNET_NO;
7474 ats->stat.modified_quality = GNUNET_NO;
7479 ats_schedule_calculation (void *cls,
7480 const struct GNUNET_SCHEDULER_TaskContext *tc)
7482 struct ATS_info *ats = (struct ATS_info *) cls;
7483 if (ats==NULL) return;
7485 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7486 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
7489 if (shutdown_in_progress == GNUNET_YES)
7493 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Running scheduled calculation\n");
7496 ats_calculate_bandwidth_distribution (ats);
7498 ats->ats_task = GNUNET_SCHEDULER_add_delayed (ats->exec_interval,
7499 &ats_schedule_calculation, ats);
7505 unsigned long long value;
7508 ats = GNUNET_malloc(sizeof (struct ATS_info));
7510 ats->min_delta = ATS_MIN_INTERVAL;
7511 ats->exec_interval = ATS_EXEC_INTERVAL;
7512 ats->max_exec_duration = ATS_MAX_EXEC_DURATION;
7513 ats->max_iterations = ATS_MAX_ITERATIONS;
7514 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7517 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ATS not active\n");
7524 ats->v_b_min = 64000;
7526 ats->dump_min_peers = 1;
7527 ats->dump_min_addr = 1;
7528 ats->dump_overwrite = GNUNET_NO;
7529 ats->mechanisms = NULL;
7531 ats->successful_executions = 0;
7532 ats->invalid_executions = 0;
7538 /* loading cost ressources */
7539 for (c=0; c<available_ressources; c++)
7541 GNUNET_asprintf(§ion,"%s_UP",ressources[c].cfg_param);
7542 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
7544 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "transport",section, &value))
7547 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found ressource cost: [%s] = %llu\n", section, value);
7549 ressources[c].c_max = value;
7552 GNUNET_free (section);
7553 GNUNET_asprintf(§ion,"%s_DOWN",ressources[c].cfg_param);
7554 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
7556 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "transport",section, &value))
7559 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found ressource cost: [%s] = %llu\n", section, value);
7561 ressources[c].c_min = value;
7564 GNUNET_free (section);
7567 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MLP"))
7568 ats->save_mlp = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_MLP");
7570 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_SOLUTION"))
7571 ats->save_solution = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_SOLUTION");
7572 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
7573 ats->dump_overwrite = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_OVERWRITE");
7574 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_PEERS"))
7576 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_MIN_PEERS", &value);
7577 ats->dump_min_peers= value;
7579 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_ADDRS"))
7581 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_MIN_ADDRS", &value);
7582 ats->dump_min_addr= value;
7584 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
7586 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_OVERWRITE", &value);
7587 ats->min_delta.rel_value = value;
7590 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
7592 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_MIN_INTERVAL", &value);
7593 ats->min_delta.rel_value = value;
7596 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_EXEC_INTERVAL"))
7598 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_EXEC_INTERVAL", &value);
7599 ats->exec_interval.rel_value = value;
7601 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
7603 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_MIN_INTERVAL", &value);
7604 ats->min_delta.rel_value = value;
7607 ats->ats_task = GNUNET_SCHEDULER_add_now(&ats_schedule_calculation, ats);
7611 static void ats_shutdown ()
7614 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_destroy\n");
7616 if (ats->ats_task != GNUNET_SCHEDULER_NO_TASK)
7617 GNUNET_SCHEDULER_cancel(ats->ats_task);
7618 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7621 ats_delete_problem ();
7628 void ats_notify_peer_connect (
7629 const struct GNUNET_PeerIdentity *peer,
7630 const struct GNUNET_TRANSPORT_ATS_Information *ats_data, int ats_count)
7633 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_connect: %s\n",GNUNET_i2s(peer));
7635 //update_addr_ats();
7636 ats->stat.recreate_problem = GNUNET_YES;
7637 ats_calculate_bandwidth_distribution(ats);
7640 void ats_notify_peer_disconnect (
7641 const struct GNUNET_PeerIdentity *peer)
7644 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_disconnect: %s\n",GNUNET_i2s(peer));
7646 ats->stat.recreate_problem = GNUNET_YES;
7647 ats_calculate_bandwidth_distribution (ats);
7650 struct ForeignAddressList * ats_get_preferred_address (
7651 struct NeighbourList *n)
7654 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ats_get_prefered_transport for peer: %s\n",GNUNET_i2s(&n->id));
7656 struct ReadyList *next = n->plugins;
7657 while (next != NULL)
7660 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "plugin: %s %i\n",next->plugin->short_name,strcmp(next->plugin->short_name,"unix"));
7664 return find_ready_address(n);
7668 * Initiate transport service.
7670 * @param cls closure
7671 * @param server the initialized server
7672 * @param c configuration to use
7676 struct GNUNET_SERVER_Handle *server,
7677 const struct GNUNET_CONFIGURATION_Handle *c)
7679 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
7680 {&handle_start, NULL,
7681 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
7682 {&handle_hello, NULL,
7683 GNUNET_MESSAGE_TYPE_HELLO, 0},
7684 {&handle_send, NULL,
7685 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
7686 {&handle_request_connect, NULL,
7687 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT, sizeof(struct TransportRequestConnectMessage)},
7688 {&handle_set_quota, NULL,
7689 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
7690 {&handle_address_lookup, NULL,
7691 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP,
7693 {&handle_blacklist_init, NULL,
7694 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT, sizeof (struct GNUNET_MessageHeader)},
7695 {&handle_blacklist_reply, NULL,
7696 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY, sizeof (struct BlacklistMessage)},
7702 unsigned long long tneigh;
7705 shutdown_in_progress = GNUNET_NO;
7707 stats = GNUNET_STATISTICS_create ("transport", cfg);
7708 validation_map = GNUNET_CONTAINER_multihashmap_create (64);
7709 /* parse configuration */
7711 GNUNET_CONFIGURATION_get_value_number (c,
7716 GNUNET_CONFIGURATION_get_value_filename (c,
7718 "HOSTKEY", &keyfile)))
7720 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7722 ("Transport service is lacking key configuration settings. Exiting.\n"));
7723 GNUNET_SCHEDULER_shutdown ();
7726 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7729 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7730 validation_map = NULL;
7734 max_connect_per_transport = (uint32_t) tneigh;
7735 peerinfo = GNUNET_PEERINFO_connect (cfg);
7736 if (peerinfo == NULL)
7738 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7739 _("Could not access PEERINFO service. Exiting.\n"));
7740 GNUNET_SCHEDULER_shutdown ();
7743 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7746 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7747 validation_map = NULL;
7748 GNUNET_free (keyfile);
7751 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
7752 GNUNET_free (keyfile);
7753 if (my_private_key == NULL)
7755 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7757 ("Transport service could not access hostkey. Exiting.\n"));
7758 GNUNET_SCHEDULER_shutdown ();
7761 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7764 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7765 validation_map = NULL;
7768 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
7769 GNUNET_CRYPTO_hash (&my_public_key,
7770 sizeof (my_public_key), &my_identity.hashPubKey);
7771 /* setup notification */
7772 GNUNET_SERVER_disconnect_notify (server,
7773 &client_disconnect_notification, NULL);
7774 /* load plugins... */
7777 GNUNET_CONFIGURATION_get_value_string (c,
7778 "TRANSPORT", "PLUGINS", &plugs))
7780 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
7781 _("Starting transport plugins `%s'\n"), plugs);
7782 pos = strtok (plugs, " ");
7785 start_transport (server, pos);
7787 pos = strtok (NULL, " ");
7789 GNUNET_free (plugs);
7791 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
7792 &shutdown_task, NULL);
7799 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
7800 _("Transport service ready.\n"));
7802 /* If we have a blacklist file, read from it */
7803 read_blacklist_file(cfg);
7804 /* process client requests */
7805 GNUNET_SERVER_add_handlers (server, handlers);
7810 * The main function for the transport service.
7812 * @param argc number of arguments from the command line
7813 * @param argv command line arguments
7814 * @return 0 ok, 1 on error
7817 main (int argc, char *const *argv)
7819 a2s (NULL, NULL, 0); /* make compiler happy */
7820 return (GNUNET_OK ==
7821 GNUNET_SERVICE_run (argc,
7824 GNUNET_SERVICE_OPTION_NONE,
7825 &run, NULL)) ? 0 : 1;
7828 /* end of gnunet-service-transport.c */