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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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 * @file transport/gnunet-service-transport.c
23 * @brief low-level P2P messaging
24 * @author Christian Grothoff
28 #include "gnunet_client_lib.h"
29 #include "gnunet_container_lib.h"
30 #include "gnunet_constants.h"
31 #include "gnunet_getopt_lib.h"
32 #include "gnunet_hello_lib.h"
33 #include "gnunet_os_lib.h"
34 #include "gnunet_peerinfo_service.h"
35 #include "gnunet_plugin_lib.h"
36 #include "gnunet_protocols.h"
37 #include "gnunet_service_lib.h"
38 #include "gnunet_signatures.h"
39 #include "gnunet_transport_plugin.h"
40 #include "transport.h"
45 #define DEBUG_BLACKLIST GNUNET_NO
47 #define DEBUG_PING_PONG GNUNET_NO
49 #define DEBUG_TRANSPORT_HELLO GNUNET_NO
51 #define DEBUG_ATS GNUNET_NO
53 #define VERBOSE_ATS GNUNET_NO
56 * Should we do some additional checks (to validate behavior
59 #define EXTRA_CHECKS GNUNET_YES
62 * How many messages can we have pending for a given client process
63 * before we start to drop incoming messages? We typically should
64 * have only one client and so this would be the primary buffer for
65 * messages, so the number should be chosen rather generously.
67 * The expectation here is that most of the time the queue is large
68 * enough so that a drop is virtually never required. Note that
69 * this value must be about as large as 'TOTAL_MSGS' in the
70 * 'test_transport_api_reliability.c', otherwise that testcase may
73 #define MAX_PENDING (128 * 1024)
76 * Size of the per-transport blacklist hash maps.
78 #define TRANSPORT_BLACKLIST_HT_SIZE 16
81 * How often should we try to reconnect to a peer using a particular
82 * transport plugin before giving up? Note that the plugin may be
83 * added back to the list after PLUGIN_RETRY_FREQUENCY expires.
85 #define MAX_CONNECT_RETRY 3
88 * Limit on the number of ready-to-run tasks when validating
89 * HELLOs. If more tasks are ready to run, we will drop
90 * HELLOs instead of validating them.
92 #define MAX_HELLO_LOAD 4
95 * How often must a peer violate bandwidth quotas before we start
96 * to simply drop its messages?
98 #define QUOTA_VIOLATION_DROP_THRESHOLD 10
101 * How long until a HELLO verification attempt should time out?
102 * Must be rather small, otherwise a partially successful HELLO
103 * validation (some addresses working) might not be available
104 * before a client's request for a connection fails for good.
105 * Besides, if a single request to an address takes a long time,
106 * then the peer is unlikely worthwhile anyway.
108 #define HELLO_VERIFICATION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
111 * How long is a PONG signature valid? We'll recycle a signature until
112 * 1/4 of this time is remaining. PONGs should expire so that if our
113 * external addresses change an adversary cannot replay them indefinitely.
114 * OTOH, we don't want to spend too much time generating PONG signatures,
115 * so they must have some lifetime to reduce our CPU usage.
117 #define PONG_SIGNATURE_LIFETIME GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 1)
120 * Priority to use for PONG messages.
122 #define TRANSPORT_PONG_PRIORITY 4
125 * How often do we re-add (cheaper) plugins to our list of plugins
126 * to try for a given connected peer?
128 #define PLUGIN_RETRY_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 15)
131 * After how long do we expire an address in a HELLO that we just
132 * validated? This value is also used for our own addresses when we
135 #define HELLO_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 12)
139 * How long before an existing address expires should we again try to
140 * validate it? Must be (significantly) smaller than
141 * HELLO_ADDRESS_EXPIRATION.
143 #define HELLO_REVALIDATION_START_TIME GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 1)
146 * Maximum frequency for re-evaluating latencies for all transport addresses.
148 #define LATENCY_EVALUATION_MAX_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 1)
151 * Maximum frequency for re-evaluating latencies for connected addresses.
153 #define CONNECTED_LATENCY_EVALUATION_MAX_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 1)
155 #define VERY_BIG_DOUBLE_VALUE 100000000000LL
158 #define ATS_Q_UPDATED 1
159 #define ATS_C_UPDATED 2
160 #define ATS_QC_UPDATED 3
161 #define ATS_UNMODIFIED 4
164 * List of addresses of other peers
166 struct ForeignAddressList
169 * This is a linked list.
171 struct ForeignAddressList *next;
174 * Which ready list does this entry belong to.
176 struct ReadyList *ready_list;
179 * How long until we auto-expire this address (unless it is
180 * re-confirmed by the transport)?
182 struct GNUNET_TIME_Absolute expires;
185 * Task used to re-validate addresses, updates latencies and
188 GNUNET_SCHEDULER_TaskIdentifier revalidate_task;
196 * Session (or NULL if no valid session currently exists or if the
197 * plugin does not use sessions).
199 struct Session *session;
201 struct ATS_ressource_entry * ressources;
203 struct ATS_quality_entry * quality;
206 * What was the last latency observed for this address, plugin and peer?
208 struct GNUNET_TIME_Relative latency;
211 * If we did not successfully transmit a message to the given peer
212 * via this connection during the specified time, we should consider
213 * the connection to be dead. This is used in the case that a TCP
214 * transport simply stalls writing to the stream but does not
215 * formerly get a signal that the other peer died.
217 struct GNUNET_TIME_Absolute timeout;
220 * How often have we tried to connect using this plugin? Used to
221 * discriminate against addresses that do not work well.
222 * FIXME: not yet used, but should be!
224 unsigned int connect_attempts;
227 * DV distance to this peer (1 if no DV is used).
228 * FIXME: need to set this from transport plugins!
238 * Have we ever estimated the latency of this address? Used to
239 * ensure that the first time we add an address, we immediately
245 * Are we currently connected via this address? The first time we
246 * successfully transmit or receive data to a peer via a particular
247 * address, we set this to GNUNET_YES. If we later get an error
248 * (disconnect notification, transmission failure, timeout), we set
249 * it back to GNUNET_NO.
254 * Is this plugin currently busy transmitting to the specific target?
255 * GNUNET_NO if not (initial, default state is GNUNET_NO). Internal
256 * messages do not count as 'in transmit'.
261 * Has this address been validated yet?
269 * Entry in linked list of network addresses for ourselves. Also
270 * includes a cached signature for 'struct TransportPongMessage's.
272 struct OwnAddressList
275 * This is a linked list.
277 struct OwnAddressList *next;
280 * How long until we actually auto-expire this address (unless it is
281 * re-confirmed by the transport)?
283 struct GNUNET_TIME_Absolute expires;
286 * How long until the current signature expires? (ZERO if the
287 * signature was never created).
289 struct GNUNET_TIME_Absolute pong_sig_expires;
292 * Signature for a 'struct TransportPongMessage' for this address.
294 struct GNUNET_CRYPTO_RsaSignature pong_signature;
305 * Entry in linked list of all of our plugins.
307 struct TransportPlugin
311 * This is a linked list.
313 struct TransportPlugin *next;
316 * API of the transport as returned by the plugin's
317 * initialization function.
319 struct GNUNET_TRANSPORT_PluginFunctions *api;
322 * Short name for the plugin (i.e. "tcp").
327 * Name of the library (i.e. "gnunet_plugin_transport_tcp").
332 * List of our known addresses for this transport.
334 struct OwnAddressList *addresses;
337 * Environment this transport service is using
340 struct GNUNET_TRANSPORT_PluginEnvironment env;
343 * ID of task that is used to clean up expired addresses.
345 GNUNET_SCHEDULER_TaskIdentifier address_update_task;
348 * Set to GNUNET_YES if we need to scrap the existing list of
349 * "addresses" and start fresh when we receive the next address
350 * update from a transport. Set to GNUNET_NO if we should just add
351 * the new address to the list and wait for the commit call.
355 struct ATS_plugin * rc;
358 * Hashmap of blacklisted peers for this particular transport.
360 struct GNUNET_CONTAINER_MultiHashMap *blacklist;
363 struct NeighbourList;
366 * For each neighbour we keep a list of messages
367 * that we still want to transmit to the neighbour.
373 * This is a doubly linked list.
375 struct MessageQueue *next;
378 * This is a doubly linked list.
380 struct MessageQueue *prev;
383 * The message(s) we want to transmit, GNUNET_MessageHeader(s)
384 * stuck together in memory. Allocated at the end of this struct.
386 const char *message_buf;
389 * Size of the message buf
391 size_t message_buf_size;
394 * Client responsible for queueing the message;
395 * used to check that a client has no two messages
396 * pending for the same target. Can be NULL.
398 struct TransportClient *client;
401 * Using which specific address should we send this message?
403 struct ForeignAddressList *specific_address;
406 * Peer ID of the Neighbour this entry belongs to.
408 struct GNUNET_PeerIdentity neighbour_id;
411 * Plugin that we used for the transmission.
412 * NULL until we scheduled a transmission.
414 struct TransportPlugin *plugin;
417 * At what time should we fail?
419 struct GNUNET_TIME_Absolute timeout;
422 * Internal message of the transport system that should not be
423 * included in the usual SEND-SEND_OK transmission confirmation
424 * traffic management scheme. Typically, "internal_msg" will
425 * be set whenever "client" is NULL (but it is not strictly
431 * How important is the message?
433 unsigned int priority;
439 * For a given Neighbour, which plugins are available
440 * to talk to this peer and what are their costs?
445 * This is a linked list.
447 struct ReadyList *next;
450 * Which of our transport plugins does this entry
453 struct TransportPlugin *plugin;
456 * Transport addresses, latency, and readiness for
457 * this particular plugin.
459 struct ForeignAddressList *addresses;
462 * To which neighbour does this ready list belong to?
464 struct NeighbourList *neighbour;
469 * Entry in linked list of all of our current neighbours.
475 * This is a linked list.
477 struct NeighbourList *next;
480 * Which of our transports is connected to this peer
481 * and what is their status?
483 struct ReadyList *plugins;
486 * Head of list of messages we would like to send to this peer;
487 * must contain at most one message per client.
489 struct MessageQueue *messages_head;
492 * Tail of list of messages we would like to send to this peer; must
493 * contain at most one message per client.
495 struct MessageQueue *messages_tail;
498 * Buffer for at most one payload message used when we receive
499 * payload data before our PING-PONG has succeeded. We then
500 * store such messages in this intermediary buffer until the
501 * connection is fully up.
503 struct GNUNET_MessageHeader *pre_connect_message_buffer;
506 * Context for peerinfo iteration.
507 * NULL after we are done processing peerinfo's information.
509 struct GNUNET_PEERINFO_IteratorContext *piter;
512 * Public key for this peer. Valid only if the respective flag is set below.
514 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
517 * Identity of this neighbour.
519 struct GNUNET_PeerIdentity id;
522 * ID of task scheduled to run when this peer is about to
523 * time out (will free resources associated with the peer).
525 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
528 * ID of task scheduled to run when we should retry transmitting
529 * the head of the message queue. Actually triggered when the
530 * transmission is timing out (we trigger instantly when we have
531 * a chance of success).
533 GNUNET_SCHEDULER_TaskIdentifier retry_task;
536 * How long until we should consider this peer dead
537 * (if we don't receive another message in the
540 struct GNUNET_TIME_Absolute peer_timeout;
543 * Tracker for inbound bandwidth.
545 struct GNUNET_BANDWIDTH_Tracker in_tracker;
548 * The latency we have seen for this particular address for
549 * this particular peer. This latency may have been calculated
550 * over multiple transports. This value reflects how long it took
551 * us to receive a response when SENDING via this particular
552 * transport/neighbour/address combination!
554 * FIXME: we need to periodically send PINGs to update this
555 * latency (at least more often than the current "huge" (11h?)
558 struct GNUNET_TIME_Relative latency;
561 * How often has the other peer (recently) violated the
562 * inbound traffic limit? Incremented by 10 per violation,
563 * decremented by 1 per non-violation (for each
566 unsigned int quota_violation_count;
569 * DV distance to this peer (1 if no DV is used).
574 * Have we seen an PONG from this neighbour in the past (and
575 * not had a disconnect since)?
580 * Do we have a valid public key for this neighbour?
582 int public_key_valid;
585 * Performance data for the peer.
587 struct GNUNET_TRANSPORT_ATS_Information *ats;
590 * Identity of the neighbour.
592 struct GNUNET_PeerIdentity peer;
597 * Message used to ask a peer to validate receipt (to check an address
598 * from a HELLO). Followed by the address we are trying to validate,
599 * or an empty address if we are just sending a PING to confirm that a
600 * connection which the receiver (of the PING) initiated is still valid.
602 struct TransportPingMessage
606 * Type will be GNUNET_MESSAGE_TYPE_TRANSPORT_PING
608 struct GNUNET_MessageHeader header;
611 * Challenge code (to ensure fresh reply).
613 uint32_t challenge GNUNET_PACKED;
616 * Who is the intended recipient?
618 struct GNUNET_PeerIdentity target;
624 * Message used to validate a HELLO. The challenge is included in the
625 * confirmation to make matching of replies to requests possible. The
626 * signature signs our public key, an expiration time and our address.<p>
628 * This message is followed by our transport address that the PING tried
629 * to confirm (if we liked it). The address can be empty (zero bytes)
630 * if the PING had not address either (and we received the request via
631 * a connection that we initiated).
633 struct TransportPongMessage
637 * Type will be GNUNET_MESSAGE_TYPE_TRANSPORT_PONG
639 struct GNUNET_MessageHeader header;
642 * Challenge code from PING (showing freshness). Not part of what
643 * is signed so that we can re-use signatures.
645 uint32_t challenge GNUNET_PACKED;
650 struct GNUNET_CRYPTO_RsaSignature signature;
653 * What are we signing and why? Two possible reason codes can be here:
654 * GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN to confirm that this is a
655 * plausible address for this peer (pid is set to identity of signer); or
656 * GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING to confirm that this is
657 * an address we used to connect to the peer with the given pid.
659 struct GNUNET_CRYPTO_RsaSignaturePurpose purpose;
662 * When does this signature expire?
664 struct GNUNET_TIME_AbsoluteNBO expiration;
667 * Either the identity of the peer Who signed this message, or the
668 * identity of the peer that we're connected to using the given
669 * address (depending on purpose.type).
671 struct GNUNET_PeerIdentity pid;
674 * Size of address appended to this message (part of what is
675 * being signed, hence not redundant).
683 * Linked list of messages to be transmitted to the client. Each
684 * entry is followed by the actual message.
686 struct ClientMessageQueueEntry
689 * This is a doubly-linked list.
691 struct ClientMessageQueueEntry *next;
694 * This is a doubly-linked list.
696 struct ClientMessageQueueEntry *prev;
701 * Client connected to the transport service.
703 struct TransportClient
707 * This is a linked list.
709 struct TransportClient *next;
712 * Handle to the client.
714 struct GNUNET_SERVER_Client *client;
717 * Linked list of messages yet to be transmitted to
720 struct ClientMessageQueueEntry *message_queue_head;
723 * Tail of linked list of messages yet to be transmitted to the
726 struct ClientMessageQueueEntry *message_queue_tail;
729 * Current transmit request handle.
731 struct GNUNET_CONNECTION_TransmitHandle *th;
734 * Is a call to "transmit_send_continuation" pending? If so, we
735 * must not free this struct (even if the corresponding client
736 * disconnects) and instead only remove it from the linked list and
737 * set the "client" field to NULL.
742 * Length of the list of messages pending for this client.
744 unsigned int message_count;
750 * Context of currently active requests to peerinfo
751 * for validation of HELLOs.
753 struct CheckHelloValidatedContext;
757 * Entry in map of all HELLOs awaiting validation.
759 struct ValidationEntry
763 * NULL if this entry is not part of a larger HELLO validation.
765 struct CheckHelloValidatedContext *chvc;
768 * The address, actually a pointer to the end
769 * of this struct. Do not free!
774 * Name of the transport.
776 char *transport_name;
779 * The public key of the peer.
781 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
784 * ID of task that will clean up this entry if we don't succeed
785 * with the validation first.
787 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
790 * At what time did we send this validation?
792 struct GNUNET_TIME_Absolute send_time;
795 * Session being validated (or NULL for none).
797 struct Session *session;
800 * Challenge number we used.
813 * Context of currently active requests to peerinfo
814 * for validation of HELLOs.
816 struct CheckHelloValidatedContext
820 * This is a doubly-linked list.
822 struct CheckHelloValidatedContext *next;
825 * This is a doubly-linked list.
827 struct CheckHelloValidatedContext *prev;
830 * Hello that we are validating.
832 const struct GNUNET_HELLO_Message *hello;
835 * Context for peerinfo iteration.
836 * NULL after we are done processing peerinfo's information.
838 struct GNUNET_PEERINFO_IteratorContext *piter;
841 * Was a HELLO known for this peer to peerinfo?
846 * Number of validation entries currently referring to this
849 unsigned int ve_count;
852 struct ATS_quality_metric
861 struct ATS_mechanism * prev;
862 struct ATS_mechanism * next;
863 struct ForeignAddressList * addr;
864 struct TransportPlugin * plugin;
865 struct ATS_peer * peer;
868 struct ATS_ressource_cost * rc;
874 struct GNUNET_PeerIdentity peer;
875 struct NeighbourList * n;
876 struct ATS_mechanism * m_head;
877 struct ATS_mechanism * m_tail;
879 /* preference value f */
887 * result of last GLPK run
893 * Ressource costs or quality metrics changed
894 * update problem before solving
896 int modified_resources;
899 * Ressource costs or quality metrics changed, update matrix
900 * update problem before solving
902 int modified_quality;
905 * Peers have connected or disconnected
906 * problem has to be recreated
908 int recreate_problem;
911 * Was the available basis invalid and we needed to rerun simplex?
913 int simplex_rerun_required;
916 * is problem currently valid and can it be solved
921 * Number of transport mechanisms in the problem
926 * Number of transport mechanisms in the problem
931 * row index where quality related rows start
936 * row index where quality related rows end
941 * row index where ressource cost related rows start
946 * row index where ressource cost related rows end
951 * column index for objective function value d
956 * column index for objective function value u
961 * column index for objective function value r
966 * column index for objective function value quality metrics
971 * column index for objective function value cost ressources
976 struct ATS_ressource_entry
978 /* index in ressources array */
980 /* depending ATSi parameter to calculcate limits */
989 /* index in ressources array */
991 /* depending ATSi parameter to calculcate limits */
993 /* cfg option to load limits */
1000 /* cofficients for the specific plugins */
1010 static struct ATS_ressource ressources[] =
1012 /* FIXME: the coefficients for the specific plugins */
1013 {1, 7, "LAN_BW_LIMIT", 0, VERY_BIG_DOUBLE_VALUE, 0, 1, 1, 2, 2, 1, 3},
1014 {2, 7, "WAN_BW_LIMIT", 0, VERY_BIG_DOUBLE_VALUE, 0, 1, 1, 2, 2, 2, 3},
1015 {3, 4, "WLAN_ENERGY_LIMIT", 0, VERY_BIG_DOUBLE_VALUE, 0, 0, 0, 0, 0, 2, 1}
1017 {4, 4, "COST_ENERGY_CONSUMPTION", VERY_BIG_DOUBLE_VALUE},
1018 {5, 5, "COST_CONNECT", VERY_BIG_DOUBLE_VALUE},
1019 {6, 6, "COST_BANDWITH_AVAILABLE", VERY_BIG_DOUBLE_VALUE},
1020 {7, 7, "COST_NETWORK_OVERHEAD", VERY_BIG_DOUBLE_VALUE},*/
1023 static int available_ressources = 3;
1031 * Time of last execution
1033 struct GNUNET_TIME_Absolute last;
1035 * Minimum intervall between two executions
1037 struct GNUNET_TIME_Relative min_delta;
1039 * Regular intervall when execution is triggered
1041 struct GNUNET_TIME_Relative exec_interval;
1043 * Maximum execution time per calculation
1045 struct GNUNET_TIME_Relative max_exec_duration;
1049 * GLPK (MLP) problem object
1055 * task to recalculate the bandwidth assignment
1057 GNUNET_SCHEDULER_TaskIdentifier ats_task;
1060 * Current state of the GLPK problem
1062 struct ATS_stat stat;
1065 * mechanisms used in current problem
1066 * needed for problem modification
1068 struct ATS_mechanism * mechanisms;
1071 * peers used in current problem
1072 * needed for problem modification
1074 struct ATS_peer * peers;
1077 * number of successful executions
1079 int successful_executions;
1082 * number with an invalid result
1084 int invalid_executions;
1087 * Maximum number of LP iterations per calculation
1092 * Dump problem to a file?
1097 * Dump solution to a file
1102 * Dump solution when minimum peers:
1107 * Dump solution when minimum addresses:
1112 * Dump solution overwrite file:
1132 * Minimum bandwidth per peer
1137 * Minimum number of connections per peer
1144 * Our HELLO message.
1146 static struct GNUNET_HELLO_Message *our_hello;
1151 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
1156 static struct GNUNET_PeerIdentity my_identity;
1161 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
1164 * Our configuration.
1166 const struct GNUNET_CONFIGURATION_Handle *cfg;
1169 * Linked list of all clients to this service.
1171 static struct TransportClient *clients;
1174 * All loaded plugins.
1176 static struct TransportPlugin *plugins;
1179 * Handle to peerinfo service.
1181 static struct GNUNET_PEERINFO_Handle *peerinfo;
1184 * All known neighbours and their HELLOs.
1186 static struct NeighbourList *neighbours;
1189 * Number of neighbours we'd like to have.
1191 static uint32_t max_connect_per_transport;
1194 * Head of linked list.
1196 static struct CheckHelloValidatedContext *chvc_head;
1199 * Tail of linked list.
1201 static struct CheckHelloValidatedContext *chvc_tail;
1204 * Map of PeerIdentities to 'struct ValidationEntry*'s (addresses
1205 * of the given peer that we are currently validating).
1207 static struct GNUNET_CONTAINER_MultiHashMap *validation_map;
1210 * Handle for reporting statistics.
1212 static struct GNUNET_STATISTICS_Handle *stats;
1215 * Is transport service shutting down ?
1217 static int shutdown_in_progress;
1220 * Handle for ats information
1222 static struct ATS_info *ats;
1224 struct ATS_quality_entry
1232 static struct ATS_quality_metric qm[] =
1234 {1, 1028, "QUALITY_NET_DISTANCE"},
1235 {2, 1034, "QUALITY_NET_DELAY"},
1237 static int available_quality_metrics = 2;
1241 * The peer specified by the given neighbour has timed-out or a plugin
1242 * has disconnected. We may either need to do nothing (other plugins
1243 * still up), or trigger a full disconnect and clean up. This
1244 * function updates our state and do the necessary notifications.
1245 * Also notifies our clients that the neighbour is now officially
1248 * @param n the neighbour list entry for the peer
1249 * @param check should we just check if all plugins
1250 * disconnected or must we ask all plugins to
1253 static void disconnect_neighbour (struct NeighbourList *n, int check);
1256 * Check the ready list for the given neighbour and if a plugin is
1257 * ready for transmission (and if we have a message), do so!
1259 * @param nexi target peer for which to transmit
1261 static void try_transmission_to_peer (struct NeighbourList *n);
1263 static void ats_shutdown ( );
1265 static void ats_notify_peer_connect (
1266 const struct GNUNET_PeerIdentity *peer,
1267 const struct GNUNET_TRANSPORT_ATS_Information *ats_data, int ats_count);
1269 static void ats_notify_peer_disconnect (
1270 const struct GNUNET_PeerIdentity *peer);
1273 static void ats_notify_ats_data (
1274 const struct GNUNET_PeerIdentity *peer,
1275 const struct GNUNET_TRANSPORT_ATS_Information *ats_data);
1278 struct ForeignAddressList * ats_get_preferred_address (
1279 struct NeighbourList *n);
1282 ats_calculate_bandwidth_distribution ();
1285 * Find an entry in the neighbour list for a particular peer.
1287 * @return NULL if not found.
1289 static struct NeighbourList *
1290 find_neighbour (const struct GNUNET_PeerIdentity *key)
1292 struct NeighbourList *head = neighbours;
1294 while ((head != NULL) &&
1295 (0 != memcmp (key, &head->id, sizeof (struct GNUNET_PeerIdentity))))
1300 static int update_addr_value (struct ForeignAddressList *fal, uint32_t value , int ats_index)
1303 int set = GNUNET_NO;
1304 for (c=0; c<available_quality_metrics; c++)
1306 if (ats_index == qm[c].atis_index)
1308 fal->quality[c].values[0] = fal->quality[c].values[1];
1309 fal->quality[c].values[1] = fal->quality[c].values[2];
1310 fal->quality[c].values[2] = value;
1312 ats->stat.modified_quality = GNUNET_YES;
1315 if (set == GNUNET_NO)
1317 for (c=0; c<available_ressources; c++)
1319 if (ats_index == ressources[c].atis_index)
1321 fal->ressources[c].c = value;
1323 ats->stat.modified_resources = GNUNET_YES;
1332 update_addr_ats (struct ForeignAddressList *fal,
1333 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
1338 for (c1=0; c1<ats_count; c1++)
1340 set = update_addr_value(fal, ntohl(ats_data[c1].value), ntohl(ats_data[c1].type));
1346 * Find an entry in the transport list for a particular transport.
1348 * @return NULL if not found.
1350 static struct TransportPlugin *
1351 find_transport (const char *short_name)
1353 struct TransportPlugin *head = plugins;
1354 while ((head != NULL) && (0 != strcmp (short_name, head->short_name)))
1360 * Is a particular peer blacklisted for a particular transport?
1362 * @param peer the peer to check for
1363 * @param plugin the plugin used to connect to the peer
1365 * @return GNUNET_YES if the peer is blacklisted, GNUNET_NO if not
1368 is_blacklisted (const struct GNUNET_PeerIdentity *peer, struct TransportPlugin *plugin)
1371 if (plugin->blacklist != NULL)
1373 if (GNUNET_CONTAINER_multihashmap_contains (plugin->blacklist, &peer->hashPubKey) == GNUNET_YES)
1376 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1377 "Peer `%s:%s' is blacklisted!\n",
1378 plugin->short_name, GNUNET_i2s (peer));
1381 GNUNET_STATISTICS_update (stats, "# blacklisted peers refused", 1, GNUNET_NO);
1391 add_peer_to_blacklist (struct GNUNET_PeerIdentity *peer,
1392 char *transport_name)
1394 struct TransportPlugin *plugin;
1396 plugin = find_transport(transport_name);
1397 if (plugin == NULL) /* Nothing to do */
1400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1401 "Adding peer `%s' with plugin `%s' to blacklist\n",
1405 if (plugin->blacklist == NULL)
1406 plugin->blacklist = GNUNET_CONTAINER_multihashmap_create(TRANSPORT_BLACKLIST_HT_SIZE);
1407 GNUNET_assert(plugin->blacklist != NULL);
1408 GNUNET_CONTAINER_multihashmap_put(plugin->blacklist, &peer->hashPubKey,
1410 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1415 * Read the blacklist file, containing transport:peer entries.
1416 * Provided the transport is loaded, set up hashmap with these
1417 * entries to blacklist peers by transport.
1421 read_blacklist_file (const struct GNUNET_CONFIGURATION_Handle *cfg)
1428 struct GNUNET_PeerIdentity pid;
1430 struct GNUNET_CRYPTO_HashAsciiEncoded enc;
1431 unsigned int entries_found;
1432 char *transport_name;
1435 GNUNET_CONFIGURATION_get_value_filename (cfg,
1441 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1442 "Option `%s' in section `%s' not specified!\n",
1448 if (GNUNET_OK != GNUNET_DISK_file_test (fn))
1449 GNUNET_DISK_fn_write (fn, NULL, 0, GNUNET_DISK_PERM_USER_READ
1450 | GNUNET_DISK_PERM_USER_WRITE);
1451 if (0 != STAT (fn, &frstat))
1453 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1454 _("Could not read blacklist file `%s'\n"), fn);
1458 if (frstat.st_size == 0)
1461 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1462 _("Blacklist file `%s' is empty.\n"),
1468 /* FIXME: use mmap */
1469 data = GNUNET_malloc_large (frstat.st_size);
1470 GNUNET_assert(data != NULL);
1471 if (frstat.st_size !=
1472 GNUNET_DISK_fn_read (fn, data, frstat.st_size))
1474 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1475 _("Failed to read blacklist from `%s'\n"), fn);
1482 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1484 while ((frstat.st_size >= sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded)) &&
1485 (pos <= frstat.st_size - sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded)))
1488 while ((colon_pos < frstat.st_size) && (data[colon_pos] != ':') && !isspace ( (unsigned char) data[colon_pos]))
1491 if (colon_pos >= frstat.st_size)
1493 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1494 _("Syntax error in blacklist file at offset %llu, giving up!\n"),
1495 (unsigned long long) colon_pos);
1501 if (isspace( (unsigned char) data[colon_pos]))
1503 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1504 _("Syntax error in blacklist file at offset %llu, skipping bytes.\n"),
1505 (unsigned long long) colon_pos);
1507 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1511 tsize = colon_pos - pos;
1512 if ((pos >= frstat.st_size) || (pos + tsize >= frstat.st_size) || (tsize == 0))
1514 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1515 _("Syntax error in blacklist file at offset %llu, giving up!\n"),
1516 (unsigned long long) colon_pos);
1525 transport_name = GNUNET_malloc(tsize + 1);
1526 memcpy(transport_name, &data[pos], tsize);
1527 pos = colon_pos + 1;
1529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1530 "Read transport name %s in blacklist file.\n",
1533 memcpy (&enc, &data[pos], sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded));
1534 if (!isspace ( (unsigned char) enc.encoding[sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded) - 1]))
1536 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1537 _("Syntax error in blacklist file at offset %llu, skipping bytes.\n"),
1538 (unsigned long long) pos);
1540 while ((pos < frstat.st_size) && (!isspace ( (unsigned char) data[pos])))
1542 GNUNET_free_non_null(transport_name);
1545 enc.encoding[sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded) - 1] = '\0';
1546 if (GNUNET_OK != GNUNET_CRYPTO_hash_from_string ((char *) &enc, &pid.hashPubKey))
1548 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1549 _("Syntax error in blacklist file at offset %llu, skipping bytes `%s'.\n"),
1550 (unsigned long long) pos,
1555 if (0 != memcmp (&pid,
1557 sizeof (struct GNUNET_PeerIdentity)))
1560 add_peer_to_blacklist (&pid,
1565 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1566 _("Found myself `%s' in blacklist (useless, ignored)\n"),
1570 pos = pos + sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded);
1571 GNUNET_free_non_null(transport_name);
1572 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1575 GNUNET_STATISTICS_update (stats, "# Transport entries blacklisted", entries_found, GNUNET_NO);
1582 * Function called to notify a client about the socket being ready to
1583 * queue more data. "buf" will be NULL and "size" zero if the socket
1584 * was closed for writing in the meantime.
1586 * @param cls closure
1587 * @param size number of bytes available in buf
1588 * @param buf where the callee should write the message
1589 * @return number of bytes written to buf
1592 transmit_to_client_callback (void *cls, size_t size, void *buf)
1594 struct TransportClient *client = cls;
1595 struct ClientMessageQueueEntry *q;
1598 const struct GNUNET_MessageHeader *msg;
1605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1606 "Transmission to client failed, closing connection.\n");
1608 /* fatal error with client, free message queue! */
1609 while (NULL != (q = client->message_queue_head))
1611 GNUNET_STATISTICS_update (stats,
1612 gettext_noop ("# bytes discarded (could not transmit to client)"),
1613 ntohs (((const struct GNUNET_MessageHeader*)&q[1])->size),
1615 GNUNET_CONTAINER_DLL_remove (client->message_queue_head,
1616 client->message_queue_tail,
1620 client->message_count = 0;
1625 while (NULL != (q = client->message_queue_head))
1627 msg = (const struct GNUNET_MessageHeader *) &q[1];
1628 msize = ntohs (msg->size);
1629 if (msize + tsize > size)
1632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1633 "Transmitting message of type %u to client.\n",
1636 GNUNET_CONTAINER_DLL_remove (client->message_queue_head,
1637 client->message_queue_tail,
1639 memcpy (&cbuf[tsize], msg, msize);
1642 client->message_count--;
1646 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
1647 client->th = GNUNET_SERVER_notify_transmit_ready (client->client,
1649 GNUNET_TIME_UNIT_FOREVER_REL,
1650 &transmit_to_client_callback,
1652 GNUNET_assert (client->th != NULL);
1659 * Convert an address to a string.
1661 * @param plugin name of the plugin responsible for the address
1662 * @param addr binary address
1663 * @param addr_len number of bytes in addr
1664 * @return NULL on error, otherwise address string
1667 a2s (const char *plugin,
1671 struct TransportPlugin *p;
1675 p = find_transport (plugin);
1678 if ((addr_len == 0) || (addr == NULL))
1680 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1681 "a2s: malformed address from plugin `%s'\n",
1683 GNUNET_assert (addr_len != 0);
1684 GNUNET_assert (addr != NULL);
1686 return p->api->address_to_string (p->api->cls,
1693 * Mark the given FAL entry as 'connected' (and hence preferred for
1694 * sending); also mark all others for the same peer as 'not connected'
1695 * (since only one can be preferred).
1697 * @param fal address to set to 'connected'
1700 mark_address_connected (struct ForeignAddressList *fal)
1702 struct ForeignAddressList *pos;
1705 GNUNET_assert (GNUNET_YES == fal->validated);
1706 if (fal->connected == GNUNET_YES)
1707 return; /* nothing to do */
1709 pos = fal->ready_list->addresses;
1712 if (GNUNET_YES == pos->connected)
1715 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1716 "Marking address `%s' as no longer connected (due to connect on other address)\n",
1717 a2s (pos->ready_list->plugin->short_name,
1721 GNUNET_break (cnt == GNUNET_YES);
1723 pos->connected = GNUNET_NO;
1724 GNUNET_STATISTICS_update (stats,
1725 gettext_noop ("# connected addresses"),
1731 fal->connected = GNUNET_YES;
1732 if (GNUNET_YES == cnt)
1734 GNUNET_STATISTICS_update (stats,
1735 gettext_noop ("# connected addresses"),
1743 * Send the specified message to the specified client. Since multiple
1744 * messages may be pending for the same client at a time, this code
1745 * makes sure that no message is lost.
1747 * @param client client to transmit the message to
1748 * @param msg the message to send
1749 * @param may_drop can this message be dropped if the
1750 * message queue for this client is getting far too large?
1753 transmit_to_client (struct TransportClient *client,
1754 const struct GNUNET_MessageHeader *msg, int may_drop)
1756 struct ClientMessageQueueEntry *q;
1759 if ((client->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
1761 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1763 ("Dropping message of type %u and size %u, have %u messages pending (%u is the soft limit)\n"),
1766 client->message_count,
1768 GNUNET_STATISTICS_update (stats,
1769 gettext_noop ("# messages dropped due to slow client"),
1774 msize = ntohs (msg->size);
1775 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
1776 q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
1777 memcpy (&q[1], msg, msize);
1778 GNUNET_CONTAINER_DLL_insert_after (client->message_queue_head,
1779 client->message_queue_tail,
1780 client->message_queue_tail,
1782 client->message_count++;
1783 if (client->th == NULL)
1785 client->th = GNUNET_SERVER_notify_transmit_ready (client->client,
1787 GNUNET_TIME_UNIT_FOREVER_REL,
1788 &transmit_to_client_callback,
1790 GNUNET_assert (client->th != NULL);
1796 * Transmit a 'SEND_OK' notification to the given client for the
1799 * @param client who to notify
1800 * @param n neighbour to notify about, can be NULL (on failure)
1801 * @param target target of the transmission
1802 * @param result status code for the transmission request
1805 transmit_send_ok (struct TransportClient *client,
1806 struct NeighbourList *n,
1807 const struct GNUNET_PeerIdentity *target,
1810 struct SendOkMessage send_ok_msg;
1812 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
1813 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
1814 send_ok_msg.success = htonl (result);
1816 send_ok_msg.latency = GNUNET_TIME_relative_hton (n->latency);
1818 send_ok_msg.latency = GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
1819 send_ok_msg.peer = *target;
1820 transmit_to_client (client, &send_ok_msg.header, GNUNET_NO);
1825 * Function called by the GNUNET_TRANSPORT_TransmitFunction
1826 * upon "completion" of a send request. This tells the API
1827 * that it is now legal to send another message to the given
1830 * @param cls closure, identifies the entry on the
1831 * message queue that was transmitted and the
1832 * client responsible for queuing the message
1833 * @param target the peer receiving the message
1834 * @param result GNUNET_OK on success, if the transmission
1835 * failed, we should not tell the client to transmit
1839 transmit_send_continuation (void *cls,
1840 const struct GNUNET_PeerIdentity *target,
1843 struct MessageQueue *mq = cls;
1844 struct NeighbourList *n;
1846 GNUNET_STATISTICS_update (stats,
1847 gettext_noop ("# bytes pending with plugins"),
1848 - (int64_t) mq->message_buf_size,
1850 if (result == GNUNET_OK)
1852 GNUNET_STATISTICS_update (stats,
1853 gettext_noop ("# bytes successfully transmitted by plugins"),
1854 mq->message_buf_size,
1859 GNUNET_STATISTICS_update (stats,
1860 gettext_noop ("# bytes with transmission failure by plugins"),
1861 mq->message_buf_size,
1864 if (mq->specific_address != NULL)
1866 if (result == GNUNET_OK)
1868 mq->specific_address->timeout =
1869 GNUNET_TIME_relative_to_absolute
1870 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
1871 if (mq->specific_address->validated == GNUNET_YES)
1872 mark_address_connected (mq->specific_address);
1876 if (mq->specific_address->connected != GNUNET_NO)
1879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1880 "Marking address `%s' as no longer connected (due to transmission problem)\n",
1881 a2s (mq->specific_address->ready_list->plugin->short_name,
1882 mq->specific_address->addr,
1883 mq->specific_address->addrlen));
1885 GNUNET_STATISTICS_update (stats,
1886 gettext_noop ("# connected addresses"),
1889 mq->specific_address->connected = GNUNET_NO;
1892 if (! mq->internal_msg)
1893 mq->specific_address->in_transmit = GNUNET_NO;
1895 n = find_neighbour(&mq->neighbour_id);
1896 if (mq->client != NULL)
1897 transmit_send_ok (mq->client, n, target, result);
1900 try_transmission_to_peer (n);
1905 * Find an address in any of the available transports for
1906 * the given neighbour that would be good for message
1907 * transmission. This is essentially the transport selection
1910 * @param neighbour for whom to select an address
1911 * @return selected address, NULL if we have none
1913 struct ForeignAddressList *
1914 find_ready_address(struct NeighbourList *neighbour)
1916 struct ReadyList *head = neighbour->plugins;
1917 struct ForeignAddressList *addresses;
1918 struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
1919 struct ForeignAddressList *best_address;
1921 /* Hack to prefer unix domain sockets */
1922 struct ForeignAddressList *unix_address = NULL;
1924 best_address = NULL;
1925 while (head != NULL)
1927 addresses = head->addresses;
1928 while (addresses != NULL)
1930 if ( (addresses->timeout.abs_value < now.abs_value) &&
1931 (addresses->connected == GNUNET_YES) )
1934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1935 "Marking long-time inactive connection to `%4s' as down.\n",
1936 GNUNET_i2s (&neighbour->id));
1938 GNUNET_STATISTICS_update (stats,
1939 gettext_noop ("# connected addresses"),
1942 addresses->connected = GNUNET_NO;
1944 addresses = addresses->next;
1947 addresses = head->addresses;
1948 while (addresses != NULL)
1950 #if DEBUG_TRANSPORT > 1
1951 if (addresses->addr != NULL)
1952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1953 "Have address `%s' for peer `%4s' (status: %d, %d, %d, %u, %llums, %u)\n",
1954 a2s (head->plugin->short_name,
1956 addresses->addrlen),
1957 GNUNET_i2s (&neighbour->id),
1958 addresses->connected,
1959 addresses->in_transmit,
1960 addresses->validated,
1961 addresses->connect_attempts,
1962 (unsigned long long) addresses->timeout.abs_value,
1963 (unsigned int) addresses->distance);
1965 if (0==strcmp(head->plugin->short_name,"unix"))
1967 if ((unix_address == NULL) || ((unix_address != NULL) &&
1968 (addresses->latency.rel_value < unix_address->latency.rel_value)))
1969 unix_address = addresses;
1971 if ( ( (best_address == NULL) ||
1972 (addresses->connected == GNUNET_YES) ||
1973 (best_address->connected == GNUNET_NO) ) &&
1974 (addresses->in_transmit == GNUNET_NO) &&
1975 ( (best_address == NULL) ||
1976 (addresses->latency.rel_value < best_address->latency.rel_value)) )
1977 best_address = addresses;
1978 /* FIXME: also give lower-latency addresses that are not
1979 connected a chance some times... */
1980 addresses = addresses->next;
1982 if (unix_address != NULL)
1986 if (unix_address != NULL)
1988 best_address = unix_address;
1990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1991 "Found UNIX address, forced this address\n");
1994 if (best_address != NULL)
1997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1998 "Best address found (`%s') has latency of %llu ms.\n",
1999 (best_address->addrlen > 0)
2000 ? a2s (best_address->ready_list->plugin->short_name,
2002 best_address->addrlen)
2004 best_address->latency.rel_value);
2009 GNUNET_STATISTICS_update (stats,
2010 gettext_noop ("# transmission attempts failed (no address)"),
2015 return best_address;
2021 * We should re-try transmitting to the given peer,
2022 * hopefully we've learned something in the meantime.
2025 retry_transmission_task (void *cls,
2026 const struct GNUNET_SCHEDULER_TaskContext *tc)
2028 struct NeighbourList *n = cls;
2030 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
2031 try_transmission_to_peer (n);
2036 * Check the ready list for the given neighbour and if a plugin is
2037 * ready for transmission (and if we have a message), do so!
2039 * @param neighbour target peer for which to transmit
2042 try_transmission_to_peer (struct NeighbourList *n)
2044 struct ReadyList *rl;
2045 struct MessageQueue *mq;
2046 struct GNUNET_TIME_Relative timeout;
2050 if (n->messages_head == NULL)
2053 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2054 "Transmission queue for `%4s' is empty\n",
2055 GNUNET_i2s (&n->id));
2057 return; /* nothing to do */
2060 mq = n->messages_head;
2061 force_address = GNUNET_YES;
2062 if (mq->specific_address == NULL)
2065 mq->specific_address = ats_get_preferred_address(n);
2066 GNUNET_STATISTICS_update (stats,
2067 gettext_noop ("# transport selected peer address freely"),
2070 force_address = GNUNET_NO;
2072 if (mq->specific_address == NULL)
2074 GNUNET_STATISTICS_update (stats,
2075 gettext_noop ("# transport failed to selected peer address"),
2078 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
2079 if (timeout.rel_value == 0)
2082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2083 "No destination address available to transmit message of size %u to peer `%4s'\n",
2084 mq->message_buf_size,
2085 GNUNET_i2s (&mq->neighbour_id));
2087 GNUNET_STATISTICS_update (stats,
2088 gettext_noop ("# bytes in message queue for other peers"),
2089 - (int64_t) mq->message_buf_size,
2091 GNUNET_STATISTICS_update (stats,
2092 gettext_noop ("# bytes discarded (no destination address available)"),
2093 mq->message_buf_size,
2095 if (mq->client != NULL)
2096 transmit_send_ok (mq->client, n, &n->id, GNUNET_NO);
2097 GNUNET_CONTAINER_DLL_remove (n->messages_head,
2101 return; /* nobody ready */
2103 GNUNET_STATISTICS_update (stats,
2104 gettext_noop ("# message delivery deferred (no address)"),
2107 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
2108 GNUNET_SCHEDULER_cancel (n->retry_task);
2109 n->retry_task = GNUNET_SCHEDULER_add_delayed (timeout,
2110 &retry_transmission_task,
2113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2114 "No validated destination address available to transmit message of size %u to peer `%4s', will wait %llums to find an address.\n",
2115 mq->message_buf_size,
2116 GNUNET_i2s (&mq->neighbour_id),
2119 /* FIXME: might want to trigger peerinfo lookup here
2120 (unless that's already pending...) */
2123 GNUNET_CONTAINER_DLL_remove (n->messages_head,
2126 if (mq->specific_address->connected == GNUNET_NO)
2127 mq->specific_address->connect_attempts++;
2128 rl = mq->specific_address->ready_list;
2129 mq->plugin = rl->plugin;
2130 if (!mq->internal_msg)
2131 mq->specific_address->in_transmit = GNUNET_YES;
2133 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2134 "Sending message of size %u for `%4s' to `%s' via plugin `%s'\n",
2135 mq->message_buf_size,
2136 GNUNET_i2s (&n->id),
2137 (mq->specific_address->addr != NULL)
2138 ? a2s (mq->plugin->short_name,
2139 mq->specific_address->addr,
2140 mq->specific_address->addrlen)
2142 rl->plugin->short_name);
2144 GNUNET_STATISTICS_update (stats,
2145 gettext_noop ("# bytes in message queue for other peers"),
2146 - (int64_t) mq->message_buf_size,
2148 GNUNET_STATISTICS_update (stats,
2149 gettext_noop ("# bytes pending with plugins"),
2150 mq->message_buf_size,
2152 ret = rl->plugin->api->send (rl->plugin->api->cls,
2155 mq->message_buf_size,
2157 GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
2158 mq->specific_address->session,
2159 mq->specific_address->addr,
2160 mq->specific_address->addrlen,
2162 &transmit_send_continuation, mq);
2165 /* failure, but 'send' would not call continuation in this case,
2166 so we need to do it here! */
2167 transmit_send_continuation (mq,
2175 * Send the specified message to the specified peer.
2177 * @param client source of the transmission request (can be NULL)
2178 * @param peer_address ForeignAddressList where we should send this message
2179 * @param priority how important is the message
2180 * @param timeout how long do we have to transmit?
2181 * @param message_buf message(s) to send GNUNET_MessageHeader(s)
2182 * @param message_buf_size total size of all messages in message_buf
2183 * @param is_internal is this an internal message; these are pre-pended and
2184 * also do not count for plugins being "ready" to transmit
2185 * @param neighbour handle to the neighbour for transmission
2188 transmit_to_peer (struct TransportClient *client,
2189 struct ForeignAddressList *peer_address,
2190 unsigned int priority,
2191 struct GNUNET_TIME_Relative timeout,
2192 const char *message_buf,
2193 size_t message_buf_size,
2194 int is_internal, struct NeighbourList *neighbour)
2196 struct MessageQueue *mq;
2201 /* check for duplicate submission */
2202 mq = neighbour->messages_head;
2205 if (mq->client == client)
2207 /* client transmitted to same peer twice
2208 before getting SEND_OK! */
2216 GNUNET_STATISTICS_update (stats,
2217 gettext_noop ("# bytes in message queue for other peers"),
2220 mq = GNUNET_malloc (sizeof (struct MessageQueue) + message_buf_size);
2221 mq->specific_address = peer_address;
2222 mq->client = client;
2223 /* FIXME: this memcpy can be up to 7% of our total runtime! */
2224 memcpy (&mq[1], message_buf, message_buf_size);
2225 mq->message_buf = (const char*) &mq[1];
2226 mq->message_buf_size = message_buf_size;
2227 memcpy(&mq->neighbour_id, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
2228 mq->internal_msg = is_internal;
2229 mq->priority = priority;
2230 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
2232 GNUNET_CONTAINER_DLL_insert (neighbour->messages_head,
2233 neighbour->messages_tail,
2236 GNUNET_CONTAINER_DLL_insert_after (neighbour->messages_head,
2237 neighbour->messages_tail,
2238 neighbour->messages_tail,
2240 try_transmission_to_peer (neighbour);
2247 struct GeneratorContext
2249 struct TransportPlugin *plug_pos;
2250 struct OwnAddressList *addr_pos;
2251 struct GNUNET_TIME_Absolute expiration;
2259 address_generator (void *cls, size_t max, void *buf)
2261 struct GeneratorContext *gc = cls;
2264 while ((gc->addr_pos == NULL) && (gc->plug_pos != NULL))
2266 gc->plug_pos = gc->plug_pos->next;
2267 gc->addr_pos = (gc->plug_pos != NULL) ? gc->plug_pos->addresses : NULL;
2269 if (NULL == gc->plug_pos)
2274 ret = GNUNET_HELLO_add_address (gc->plug_pos->short_name,
2277 gc->addr_pos->addrlen, buf, max);
2278 gc->addr_pos = gc->addr_pos->next;
2284 * Construct our HELLO message from all of the addresses of
2285 * all of the transports.
2290 struct GNUNET_HELLO_Message *hello;
2291 struct TransportClient *cpos;
2292 struct NeighbourList *npos;
2293 struct GeneratorContext gc;
2295 gc.plug_pos = plugins;
2296 gc.addr_pos = plugins != NULL ? plugins->addresses : NULL;
2297 gc.expiration = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
2298 hello = GNUNET_HELLO_create (&my_public_key, &address_generator, &gc);
2300 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2301 "Refreshed my `%s', new size is %d\n", "HELLO", GNUNET_HELLO_size(hello));
2303 GNUNET_STATISTICS_update (stats,
2304 gettext_noop ("# refreshed my HELLO"),
2308 while (cpos != NULL)
2310 transmit_to_client (cpos,
2311 (const struct GNUNET_MessageHeader *) hello,
2316 GNUNET_free_non_null (our_hello);
2318 GNUNET_PEERINFO_add_peer (peerinfo, our_hello);
2320 while (npos != NULL)
2323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2324 "Transmitting updated `%s' to neighbour `%4s'\n",
2325 "HELLO", GNUNET_i2s (&npos->id));
2327 GNUNET_STATISTICS_update (stats,
2328 gettext_noop ("# transmitted my HELLO to other peers"),
2331 transmit_to_peer (NULL, NULL, 0,
2332 HELLO_ADDRESS_EXPIRATION,
2333 (const char *) our_hello,
2334 GNUNET_HELLO_size(our_hello),
2342 * Task used to clean up expired addresses for a plugin.
2344 * @param cls closure
2348 expire_address_task (void *cls,
2349 const struct GNUNET_SCHEDULER_TaskContext *tc);
2353 * Update the list of addresses for this plugin,
2354 * expiring those that are past their expiration date.
2356 * @param plugin addresses of which plugin should be recomputed?
2357 * @param fresh set to GNUNET_YES if a new address was added
2358 * and we need to regenerate the HELLO even if nobody
2362 update_addresses (struct TransportPlugin *plugin,
2365 static struct GNUNET_TIME_Absolute last_update;
2366 struct GNUNET_TIME_Relative min_remaining;
2367 struct GNUNET_TIME_Relative remaining;
2368 struct GNUNET_TIME_Absolute now;
2369 struct OwnAddressList *pos;
2370 struct OwnAddressList *prev;
2371 struct OwnAddressList *next;
2374 if (plugin->address_update_task != GNUNET_SCHEDULER_NO_TASK)
2375 GNUNET_SCHEDULER_cancel (plugin->address_update_task);
2376 plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
2377 now = GNUNET_TIME_absolute_get ();
2378 min_remaining = GNUNET_TIME_UNIT_FOREVER_REL;
2379 expired = (GNUNET_TIME_absolute_get_duration (last_update).rel_value > (HELLO_ADDRESS_EXPIRATION.rel_value / 4));
2381 pos = plugin->addresses;
2385 if (pos->expires.abs_value < now.abs_value)
2387 expired = GNUNET_YES;
2389 plugin->addresses = pos->next;
2391 prev->next = pos->next;
2396 remaining = GNUNET_TIME_absolute_get_remaining (pos->expires);
2397 if (remaining.rel_value < min_remaining.rel_value)
2398 min_remaining = remaining;
2404 if (expired || fresh)
2409 min_remaining = GNUNET_TIME_relative_min (min_remaining,
2410 GNUNET_TIME_relative_divide (HELLO_ADDRESS_EXPIRATION,
2412 plugin->address_update_task
2413 = GNUNET_SCHEDULER_add_delayed (min_remaining,
2414 &expire_address_task, plugin);
2419 * Task used to clean up expired addresses for a plugin.
2421 * @param cls closure
2425 expire_address_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2427 struct TransportPlugin *plugin = cls;
2429 plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
2430 if (0 == (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2431 update_addresses (plugin, GNUNET_NO);
2436 * Iterator over hash map entries that NULLs the session of validation
2437 * entries that match the given session.
2439 * @param cls closure (the 'struct Session*' to match against)
2440 * @param key current key code (peer ID, not used)
2441 * @param value value in the hash map ('struct ValidationEntry*')
2442 * @return GNUNET_YES (we should continue to iterate)
2445 remove_session_validations (void *cls,
2446 const GNUNET_HashCode * key,
2449 struct Session *session = cls;
2450 struct ValidationEntry *ve = value;
2452 if (session == ve->session)
2459 * We've been disconnected from the other peer (for some
2460 * connection-oriented transport). Either quickly
2461 * re-establish the connection or signal the disconnect
2464 * Only signal CORE level disconnect if ALL addresses
2465 * for the peer are exhausted.
2467 * @param p overall plugin context
2468 * @param nl neighbour that was disconnected
2471 try_fast_reconnect (struct TransportPlugin *p,
2472 struct NeighbourList *nl)
2474 /* FIXME-MW: fast reconnect / transport switching not implemented... */
2475 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2476 "try_fast_reconnect not implemented!\n");
2477 /* Note: the idea here is to hide problems with transports (or
2478 switching between plugins) from the core to eliminate the need to
2479 re-negotiate session keys and the like; OTOH, we should tell core
2480 quickly (much faster than timeout) `if a connection was lost and
2481 could not be re-established (i.e. other peer went down or is
2482 unable / refuses to communicate);
2484 So we should consider:
2485 1) ideally: our own willingness / need to connect
2486 2) prior failures to connect to this peer (by plugin)
2487 3) ideally: reasons why other peer terminated (as far as knowable)
2489 Most importantly, it must be POSSIBLE for another peer to terminate
2490 a connection for a while (without us instantly re-establishing it).
2491 Similarly, if another peer is gone we should quickly notify CORE.
2492 OTOH, if there was a minor glitch (i.e. crash of gnunet-service-transport
2493 on the other end), we should reconnect in such a way that BOTH CORE
2494 services never even notice.
2495 Furthermore, the same mechanism (or small variation) could be used
2496 to switch to a better-performing plugin (ATS).
2498 Finally, this needs to be tested throughly... */
2501 * GNUNET_NO in the call below makes transport disconnect the peer,
2502 * even if only a single address (out of say, six) went away. This
2503 * function must be careful to ONLY disconnect if the peer is gone,
2504 * not just a specifi address.
2506 * More specifically, half the places it was used had it WRONG.
2509 /* No reconnect, signal disconnect instead! */
2511 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2512 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&nl->id),
2513 "try_fast_reconnect");
2515 disconnect_neighbour (nl, GNUNET_YES);
2520 * Function that will be called whenever the plugin internally
2521 * cleans up a session pointer and hence the service needs to
2522 * discard all of those sessions as well. Plugins that do not
2523 * use sessions can simply omit calling this function and always
2524 * use NULL wherever a session pointer is needed.
2526 * @param cls closure
2527 * @param peer which peer was the session for
2528 * @param session which session is being destoyed
2531 plugin_env_session_end (void *cls,
2532 const struct GNUNET_PeerIdentity *peer,
2533 struct Session *session)
2535 struct TransportPlugin *p = cls;
2536 struct NeighbourList *nl;
2537 struct ReadyList *rl;
2538 struct ForeignAddressList *pos;
2539 struct ForeignAddressList *prev;
2542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2543 "Session ended with peer `%4s', %s\n",
2545 "plugin_env_session_end");
2547 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
2548 &remove_session_validations,
2550 nl = find_neighbour (peer);
2554 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2555 "No neighbour record found for peer `%4s'\n",
2558 return; /* was never marked as connected */
2563 if (rl->plugin == p)
2570 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2571 "Plugin was associated with peer `%4s'\n",
2574 disconnect_neighbour (nl, GNUNET_YES);
2578 pos = rl->addresses;
2579 while ( (pos != NULL) &&
2580 (pos->session != session) )
2588 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2589 "Session was never marked as ready for peer `%4s'\n",
2592 //FIXME: This conflicts with inbound tcp connections and tcp nat ... debugging in progress
2593 disconnect_neighbour (nl, GNUNET_YES);
2594 return; /* was never marked as connected */
2596 pos->session = NULL;
2597 if (pos->addrlen != 0)
2599 if (nl->received_pong != GNUNET_NO)
2600 try_fast_reconnect (p, nl);
2602 disconnect_neighbour (nl, GNUNET_YES);
2605 /* was inbound connection, free 'pos' */
2607 rl->addresses = pos->next;
2609 prev->next = pos->next;
2610 if (GNUNET_SCHEDULER_NO_TASK != pos->revalidate_task)
2612 GNUNET_SCHEDULER_cancel (pos->revalidate_task);
2613 pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
2615 GNUNET_free_non_null(pos->ressources);
2616 GNUNET_free_non_null(pos->quality);
2618 ats->stat.recreate_problem = GNUNET_YES;
2619 if (nl->received_pong == GNUNET_NO)
2621 disconnect_neighbour (nl, GNUNET_YES);
2622 return; /* nothing to do, never connected... */
2624 /* check if we have any validated addresses left */
2625 pos = rl->addresses;
2630 try_fast_reconnect (p, nl);
2635 /* no valid addresses left, signal disconnect! */
2638 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2639 "Disconnecting peer `%4s', %s\n",
2641 "plugin_env_session_end");
2643 /* FIXME: This doesn't mean there are no addresses left for this PEER,
2644 * it means there aren't any left for this PLUGIN/PEER combination! So
2645 * calling disconnect_neighbour here with GNUNET_NO forces disconnect
2646 * when it isn't necessary. Using GNUNET_YES at least checks to see
2647 * if there are any addresses that work first, so as not to overdo it.
2650 disconnect_neighbour (nl, GNUNET_YES);
2655 * Function that must be called by each plugin to notify the
2656 * transport service about the addresses under which the transport
2657 * provided by the plugin can be reached.
2659 * @param cls closure
2660 * @param name name of the transport that generated the address
2661 * @param addr one of the addresses of the host, NULL for the last address
2662 * the specific address format depends on the transport
2663 * @param addrlen length of the address
2664 * @param expires when should this address automatically expire?
2667 plugin_env_notify_address (void *cls,
2671 struct GNUNET_TIME_Relative expires)
2673 struct TransportPlugin *p = cls;
2674 struct OwnAddressList *al;
2675 struct GNUNET_TIME_Absolute abex;
2677 GNUNET_assert (addr != NULL);
2678 abex = GNUNET_TIME_relative_to_absolute (expires);
2679 GNUNET_assert (p == find_transport (name));
2683 if ( (addrlen == al->addrlen) &&
2684 (0 == memcmp (addr, &al[1], addrlen)) )
2687 update_addresses (p, GNUNET_NO);
2692 al = GNUNET_malloc (sizeof (struct OwnAddressList) + addrlen);
2693 al->next = p->addresses;
2696 al->addrlen = addrlen;
2697 memcpy (&al[1], addr, addrlen);
2698 update_addresses (p, GNUNET_YES);
2703 * Notify all of our clients about a peer connecting.
2706 notify_clients_connect (const struct GNUNET_PeerIdentity *peer,
2707 struct GNUNET_TIME_Relative latency,
2710 struct ConnectInfoMessage * cim;
2711 struct TransportClient *cpos;
2716 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2717 "Notifying clients about connection from `%s'\n",
2720 GNUNET_STATISTICS_update (stats,
2721 gettext_noop ("# peers connected"),
2726 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
2727 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
2731 cim = GNUNET_malloc (size);
2733 cim->header.size = htons (size);
2734 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
2735 cim->ats_count = htonl(2);
2736 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
2737 (&(cim->ats))[0].value = htonl (distance);
2738 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
2739 (&(cim->ats))[1].value = htonl ((uint32_t) latency.rel_value);
2740 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
2741 (&(cim->ats))[2].value = htonl (0);
2742 memcpy (&cim->id, peer, sizeof (struct GNUNET_PeerIdentity));
2744 /* notify ats about connecting peer */
2745 if (shutdown_in_progress == GNUNET_NO)
2746 ats_notify_peer_connect (peer, &(cim->ats), 2);
2749 while (cpos != NULL)
2751 transmit_to_client (cpos, &(cim->header), GNUNET_NO);
2760 * Notify all of our clients about a peer disconnecting.
2763 notify_clients_disconnect (const struct GNUNET_PeerIdentity *peer)
2765 struct DisconnectInfoMessage dim;
2766 struct TransportClient *cpos;
2769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2770 "Notifying clients about lost connection to `%s'\n",
2773 GNUNET_STATISTICS_update (stats,
2774 gettext_noop ("# peers connected"),
2777 dim.header.size = htons (sizeof (struct DisconnectInfoMessage));
2778 dim.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
2779 dim.reserved = htonl (0);
2780 memcpy (&dim.peer, peer, sizeof (struct GNUNET_PeerIdentity));
2782 /* notify ats about connecting peer */
2783 if (shutdown_in_progress == GNUNET_NO)
2784 ats_notify_peer_disconnect (peer);
2787 while (cpos != NULL)
2789 transmit_to_client (cpos, &dim.header, GNUNET_NO);
2796 * Find a ForeignAddressList entry for the given neighbour
2797 * that matches the given address and transport.
2799 * @param neighbour which peer we care about
2800 * @param tname name of the transport plugin
2801 * @param session session to look for, NULL for 'any'; otherwise
2802 * can be used for the service to "learn" this session ID
2804 * @param addr binary address
2805 * @param addrlen length of addr
2806 * @return NULL if no such entry exists
2808 static struct ForeignAddressList *
2809 find_peer_address(struct NeighbourList *neighbour,
2811 struct Session *session,
2815 struct ReadyList *head;
2816 struct ForeignAddressList *pos;
2818 head = neighbour->plugins;
2819 while (head != NULL)
2821 if (0 == strcmp (tname, head->plugin->short_name))
2827 pos = head->addresses;
2828 while ( (pos != NULL) &&
2829 ( (pos->addrlen != addrlen) ||
2830 (memcmp(pos->addr, addr, addrlen) != 0) ) )
2832 if ( (session != NULL) &&
2833 (pos->session == session) )
2837 if ( (session != NULL) && (pos != NULL) )
2838 pos->session = session; /* learn it! */
2844 * Get the peer address struct for the given neighbour and
2845 * address. If it doesn't yet exist, create it.
2847 * @param neighbour which peer we care about
2848 * @param tname name of the transport plugin
2849 * @param session session of the plugin, or NULL for none
2850 * @param addr binary address
2851 * @param addrlen length of addr
2852 * @return NULL if we do not have a transport plugin for 'tname'
2854 static struct ForeignAddressList *
2855 add_peer_address (struct NeighbourList *neighbour,
2857 struct Session *session,
2861 struct ReadyList *head;
2862 struct ForeignAddressList *ret;
2865 ret = find_peer_address (neighbour, tname, session, addr, addrlen);
2868 head = neighbour->plugins;
2870 while (head != NULL)
2872 if (0 == strcmp (tname, head->plugin->short_name))
2878 ret = GNUNET_malloc(sizeof(struct ForeignAddressList) + addrlen);
2879 ret->session = session;
2880 if ((addrlen > 0) && (addr != NULL))
2882 ret->addr = (const char*) &ret[1];
2883 memcpy (&ret[1], addr, addrlen);
2890 ret->ressources = GNUNET_malloc(available_ressources * sizeof (struct ATS_ressource_entry));
2891 for (c=0; c<available_ressources; c++)
2893 struct ATS_ressource_entry *r = ret->ressources;
2895 r[c].atis_index = ressources[c].atis_index;
2896 if (0 == strcmp(neighbour->plugins->plugin->short_name,"unix"))
2898 r[c].c = ressources[c].c_unix;
2900 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"udp"))
2902 r[c].c = ressources[c].c_udp;
2904 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"tcp"))
2906 r[c].c = ressources[c].c_tcp;
2908 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"http"))
2910 r[c].c = ressources[c].c_http;
2912 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"https"))
2914 r[c].c = ressources[c].c_https;
2916 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"wlan"))
2918 r[c].c = ressources[c].c_wlan;
2922 r[c].c = ressources[c].c_default;
2923 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2924 "Assigning default cost to peer `%s' addr plugin `%s'! This should not happen!\n",
2925 GNUNET_i2s(&neighbour->peer),
2926 neighbour->plugins->plugin->short_name);
2930 ret->quality = GNUNET_malloc (available_quality_metrics * sizeof (struct ATS_quality_entry));
2931 ret->addrlen = addrlen;
2932 ret->expires = GNUNET_TIME_relative_to_absolute
2933 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2934 ret->latency = GNUNET_TIME_relative_get_forever();
2936 ret->timeout = GNUNET_TIME_relative_to_absolute
2937 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2938 ret->ready_list = head;
2939 ret->next = head->addresses;
2940 head->addresses = ret;
2946 * Closure for 'add_validated_address'.
2948 struct AddValidatedAddressContext
2951 * Entry that has been validated.
2953 const struct ValidationEntry *ve;
2956 * Flag set after we have added the address so
2957 * that we terminate the iteration next time.
2964 * Callback function used to fill a buffer of max bytes with a list of
2965 * addresses in the format used by HELLOs. Should use
2966 * "GNUNET_HELLO_add_address" as a helper function.
2968 * @param cls the 'struct AddValidatedAddressContext' with the validated address
2969 * @param max maximum number of bytes that can be written to buf
2970 * @param buf where to write the address information
2971 * @return number of bytes written, 0 to signal the
2972 * end of the iteration.
2975 add_validated_address (void *cls,
2976 size_t max, void *buf)
2978 struct AddValidatedAddressContext *avac = cls;
2979 const struct ValidationEntry *ve = avac->ve;
2981 if (GNUNET_YES == avac->done)
2983 avac->done = GNUNET_YES;
2984 return GNUNET_HELLO_add_address (ve->transport_name,
2985 GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION),
2995 * Closure for 'check_address_exists'.
2997 struct CheckAddressExistsClosure
3000 * Address to check for.
3005 * Name of the transport.
3012 struct Session *session;
3015 * Set to GNUNET_YES if the address exists.
3028 * Iterator over hash map entries. Checks if the given
3029 * validation entry is for the same address as what is given
3032 * @param cls the 'struct CheckAddressExistsClosure*'
3033 * @param key current key code (ignored)
3034 * @param value value in the hash map ('struct ValidationEntry')
3035 * @return GNUNET_YES if we should continue to
3036 * iterate (mismatch), GNUNET_NO if not (entry matched)
3039 check_address_exists (void *cls,
3040 const GNUNET_HashCode * key,
3043 struct CheckAddressExistsClosure *caec = cls;
3044 struct ValidationEntry *ve = value;
3046 if ( (0 == strcmp (caec->tname,
3047 ve->transport_name)) &&
3048 (caec->addrlen == ve->addrlen) &&
3049 (0 == memcmp (caec->addr,
3053 caec->exists = GNUNET_YES;
3056 if ( (ve->session != NULL) &&
3057 (caec->session == ve->session) )
3059 caec->exists = GNUNET_YES;
3068 * Iterator to free entries in the validation_map.
3070 * @param cls closure (unused)
3071 * @param key current key code
3072 * @param value value in the hash map (validation to abort)
3073 * @return GNUNET_YES (always)
3076 abort_validation (void *cls,
3077 const GNUNET_HashCode * key,
3080 struct ValidationEntry *va = value;
3082 if (GNUNET_SCHEDULER_NO_TASK != va->timeout_task)
3083 GNUNET_SCHEDULER_cancel (va->timeout_task);
3084 GNUNET_free (va->transport_name);
3085 if (va->chvc != NULL)
3087 va->chvc->ve_count--;
3088 if (va->chvc->ve_count == 0)
3090 GNUNET_CONTAINER_DLL_remove (chvc_head,
3093 GNUNET_free (va->chvc);
3103 * HELLO validation cleanup task (validation failed).
3105 * @param cls the 'struct ValidationEntry' that failed
3106 * @param tc scheduler context (unused)
3109 timeout_hello_validation (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3111 struct ValidationEntry *va = cls;
3112 struct GNUNET_PeerIdentity pid;
3114 va->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3115 GNUNET_STATISTICS_update (stats,
3116 gettext_noop ("# address validation timeouts"),
3119 GNUNET_CRYPTO_hash (&va->publicKey,
3121 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
3123 GNUNET_break (GNUNET_OK ==
3124 GNUNET_CONTAINER_multihashmap_remove (validation_map,
3127 abort_validation (NULL, NULL, va);
3132 neighbour_timeout_task (void *cls,
3133 const struct GNUNET_SCHEDULER_TaskContext *tc)
3135 struct NeighbourList *n = cls;
3138 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
3139 "Neighbour `%4s' has timed out!\n", GNUNET_i2s (&n->id));
3141 GNUNET_STATISTICS_update (stats,
3142 gettext_noop ("# disconnects due to timeout"),
3145 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3146 disconnect_neighbour (n, GNUNET_NO);
3151 * Schedule the job that will cause us to send a PING to the
3152 * foreign address to evaluate its validity and latency.
3154 * @param fal address to PING
3157 schedule_next_ping (struct ForeignAddressList *fal);
3161 * Add the given address to the list of foreign addresses
3162 * available for the given peer (check for duplicates).
3164 * @param cls the respective 'struct NeighbourList' to update
3165 * @param tname name of the transport
3166 * @param expiration expiration time
3167 * @param addr the address
3168 * @param addrlen length of the address
3169 * @return GNUNET_OK (always)
3172 add_to_foreign_address_list (void *cls,
3174 struct GNUNET_TIME_Absolute expiration,
3178 struct NeighbourList *n = cls;
3179 struct ForeignAddressList *fal;
3182 GNUNET_STATISTICS_update (stats,
3183 gettext_noop ("# valid peer addresses returned by PEERINFO"),
3187 fal = find_peer_address (n, tname, NULL, addr, addrlen);
3190 #if DEBUG_TRANSPORT_HELLO
3191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3192 "Adding address `%s' (%s) for peer `%4s' due to PEERINFO data for %llums.\n",
3193 a2s (tname, addr, addrlen),
3195 GNUNET_i2s (&n->id),
3196 expiration.abs_value);
3198 fal = add_peer_address (n, tname, NULL, addr, addrlen);
3201 GNUNET_STATISTICS_update (stats,
3202 gettext_noop ("# previously validated addresses lacking transport"),
3208 fal->expires = GNUNET_TIME_absolute_max (expiration,
3210 schedule_next_ping (fal);
3216 fal->expires = GNUNET_TIME_absolute_max (expiration,
3222 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3223 "Failed to add new address for `%4s'\n",
3224 GNUNET_i2s (&n->id));
3228 if (fal->validated == GNUNET_NO)
3230 fal->validated = GNUNET_YES;
3231 GNUNET_STATISTICS_update (stats,
3232 gettext_noop ("# peer addresses considered valid"),
3236 if (try == GNUNET_YES)
3239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3240 "Have new addresses, will try to trigger transmissions.\n");
3242 try_transmission_to_peer (n);
3249 * Add addresses in validated HELLO "h" to the set of addresses
3250 * we have for this peer.
3252 * @param cls closure ('struct NeighbourList*')
3253 * @param peer id of the peer, NULL for last call
3254 * @param h hello message for the peer (can be NULL)
3255 * @param err_msg NULL if successful, otherwise contains error message
3258 add_hello_for_peer (void *cls,
3259 const struct GNUNET_PeerIdentity *peer,
3260 const struct GNUNET_HELLO_Message *h,
3261 const char *err_msg)
3263 struct NeighbourList *n = cls;
3265 if (err_msg != NULL)
3268 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3269 _("Error in communication with PEERINFO service: %s\n"),
3276 GNUNET_STATISTICS_update (stats,
3277 gettext_noop ("# outstanding peerinfo iterate requests"),
3284 return; /* no HELLO available */
3286 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3287 "Peerinfo had `%s' message for peer `%4s', adding existing addresses.\n",
3291 if (GNUNET_YES != n->public_key_valid)
3293 GNUNET_HELLO_get_key (h, &n->publicKey);
3294 n->public_key_valid = GNUNET_YES;
3296 GNUNET_HELLO_iterate_addresses (h,
3298 &add_to_foreign_address_list,
3304 * Create a fresh entry in our neighbour list for the given peer.
3305 * Will try to transmit our current HELLO to the new neighbour.
3306 * Do not call this function directly, use 'setup_peer_check_blacklist.
3308 * @param peer the peer for which we create the entry
3309 * @param do_hello should we schedule transmitting a HELLO
3310 * @return the new neighbour list entry
3312 static struct NeighbourList *
3313 setup_new_neighbour (const struct GNUNET_PeerIdentity *peer,
3316 struct NeighbourList *n;
3317 struct TransportPlugin *tp;
3318 struct ReadyList *rl;
3321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3322 "Setting up state for neighbour `%4s'\n",
3325 GNUNET_STATISTICS_update (stats,
3326 gettext_noop ("# active neighbours"),
3329 n = GNUNET_malloc (sizeof (struct NeighbourList));
3330 n->next = neighbours;
3334 GNUNET_TIME_relative_to_absolute
3335 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
3336 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
3337 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
3338 MAX_BANDWIDTH_CARRY_S);
3342 if ((tp->api->send != NULL) && (!is_blacklisted(peer, tp)))
3344 rl = GNUNET_malloc (sizeof (struct ReadyList));
3346 rl->next = n->plugins;
3349 rl->addresses = NULL;
3353 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
3355 n->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
3356 &neighbour_timeout_task, n);
3359 GNUNET_STATISTICS_update (stats,
3360 gettext_noop ("# peerinfo new neighbor iterate requests"),
3363 GNUNET_STATISTICS_update (stats,
3364 gettext_noop ("# outstanding peerinfo iterate requests"),
3367 n->piter = GNUNET_PEERINFO_iterate (peerinfo, peer,
3368 GNUNET_TIME_UNIT_FOREVER_REL,
3369 &add_hello_for_peer, n);
3371 GNUNET_STATISTICS_update (stats,
3372 gettext_noop ("# HELLO's sent to new neighbors"),
3375 if (NULL != our_hello)
3376 transmit_to_peer (NULL, NULL, 0,
3377 HELLO_ADDRESS_EXPIRATION,
3378 (const char *) our_hello, GNUNET_HELLO_size(our_hello),
3386 * Function called after we have checked if communicating
3387 * with a given peer is acceptable.
3389 * @param cls closure
3390 * @param n NULL if communication is not acceptable
3392 typedef void (*SetupContinuation)(void *cls,
3393 struct NeighbourList *n);
3397 * Information kept for each client registered to perform
3403 * This is a linked list.
3405 struct Blacklisters *next;
3408 * This is a linked list.
3410 struct Blacklisters *prev;
3413 * Client responsible for this entry.
3415 struct GNUNET_SERVER_Client *client;
3418 * Blacklist check that we're currently performing.
3420 struct BlacklistCheck *bc;
3426 * Head of DLL of blacklisting clients.
3428 static struct Blacklisters *bl_head;
3431 * Tail of DLL of blacklisting clients.
3433 static struct Blacklisters *bl_tail;
3437 * Context we use when performing a blacklist check.
3439 struct BlacklistCheck
3443 * This is a linked list.
3445 struct BlacklistCheck *next;
3448 * This is a linked list.
3450 struct BlacklistCheck *prev;
3453 * Peer being checked.
3455 struct GNUNET_PeerIdentity peer;
3458 * Option for setup neighbour afterwards.
3463 * Continuation to call with the result.
3465 SetupContinuation cont;
3473 * Current transmission request handle for this client, or NULL if no
3474 * request is pending.
3476 struct GNUNET_CONNECTION_TransmitHandle *th;
3479 * Our current position in the blacklisters list.
3481 struct Blacklisters *bl_pos;
3484 * Current task performing the check.
3486 GNUNET_SCHEDULER_TaskIdentifier task;
3491 * Head of DLL of active blacklisting queries.
3493 static struct BlacklistCheck *bc_head;
3496 * Tail of DLL of active blacklisting queries.
3498 static struct BlacklistCheck *bc_tail;
3502 * Perform next action in the blacklist check.
3504 * @param cls the 'struct BlacklistCheck*'
3508 do_blacklist_check (void *cls,
3509 const struct GNUNET_SCHEDULER_TaskContext *tc);
3512 * Transmit blacklist query to the client.
3514 * @param cls the 'struct BlacklistCheck'
3515 * @param size number of bytes allowed
3516 * @param buf where to copy the message
3517 * @return number of bytes copied to buf
3520 transmit_blacklist_message (void *cls,
3524 struct BlacklistCheck *bc = cls;
3525 struct Blacklisters *bl;
3526 struct BlacklistMessage bm;
3531 GNUNET_assert (bc->task == GNUNET_SCHEDULER_NO_TASK);
3532 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3534 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3535 "Failed to send blacklist test for peer `%s' to client\n",
3536 GNUNET_i2s (&bc->peer));
3540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3541 "Sending blacklist test for peer `%s' to client\n",
3542 GNUNET_i2s (&bc->peer));
3545 bm.header.size = htons (sizeof (struct BlacklistMessage));
3546 bm.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_QUERY);
3547 bm.is_allowed = htonl (0);
3549 memcpy (buf, &bm, sizeof (bm));
3550 GNUNET_SERVER_receive_done (bl->client, GNUNET_OK);
3556 * Perform next action in the blacklist check.
3558 * @param cls the 'struct BlacklistCheck*'
3562 do_blacklist_check (void *cls,
3563 const struct GNUNET_SCHEDULER_TaskContext *tc)
3565 struct BlacklistCheck *bc = cls;
3566 struct Blacklisters *bl;
3568 bc->task = GNUNET_SCHEDULER_NO_TASK;
3573 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3574 "No blacklist clients active, will now setup neighbour record for peer `%s'\n",
3575 GNUNET_i2s (&bc->peer));
3577 bc->cont (bc->cont_cls,
3578 setup_new_neighbour (&bc->peer, bc->do_hello));
3585 bc->th = GNUNET_SERVER_notify_transmit_ready (bl->client,
3586 sizeof (struct BlacklistMessage),
3587 GNUNET_TIME_UNIT_FOREVER_REL,
3588 &transmit_blacklist_message,
3595 * Obtain a 'struct NeighbourList' for the given peer. If such an entry
3596 * does not yet exist, check the blacklist. If the blacklist says creating
3597 * one is acceptable, create one and call the continuation; otherwise
3598 * call the continuation with NULL.
3600 * @param peer peer to setup or look up a struct NeighbourList for
3601 * @param do_hello should we also schedule sending our HELLO to the peer
3602 * if this is a new record
3603 * @param cont function to call with the 'struct NeigbhbourList*'
3604 * @param cont_cls closure for cont
3607 setup_peer_check_blacklist (const struct GNUNET_PeerIdentity *peer,
3609 SetupContinuation cont,
3612 struct NeighbourList *n;
3613 struct BlacklistCheck *bc;
3615 n = find_neighbour(peer);
3619 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3620 "Neighbour record exists for peer `%s'\n",
3627 if (bl_head == NULL)
3630 cont (cont_cls, setup_new_neighbour (peer, do_hello));
3632 setup_new_neighbour(peer, do_hello);
3635 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3636 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3638 bc->do_hello = do_hello;
3640 bc->cont_cls = cont_cls;
3641 bc->bl_pos = bl_head;
3642 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3648 * Function called with the result of querying a new blacklister about
3649 * it being allowed (or not) to continue to talk to an existing neighbour.
3651 * @param cls the original 'struct NeighbourList'
3652 * @param n NULL if we need to disconnect
3655 confirm_or_drop_neighbour (void *cls,
3656 struct NeighbourList *n)
3658 struct NeighbourList * orig = cls;
3663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3664 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&orig->id),
3665 "confirm_or_drop_neighboUr");
3667 disconnect_neighbour (orig, GNUNET_NO);
3673 * Handle a request to start a blacklist.
3675 * @param cls closure (always NULL)
3676 * @param client identification of the client
3677 * @param message the actual message
3680 handle_blacklist_init (void *cls,
3681 struct GNUNET_SERVER_Client *client,
3682 const struct GNUNET_MessageHeader *message)
3684 struct Blacklisters *bl;
3685 struct BlacklistCheck *bc;
3686 struct NeighbourList *n;
3691 if (bl->client == client)
3694 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3699 bl = GNUNET_malloc (sizeof (struct Blacklisters));
3700 bl->client = client;
3701 GNUNET_SERVER_client_keep (client);
3702 GNUNET_CONTAINER_DLL_insert_after (bl_head, bl_tail, bl_tail, bl);
3703 /* confirm that all existing connections are OK! */
3707 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3708 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3710 bc->do_hello = GNUNET_NO;
3711 bc->cont = &confirm_or_drop_neighbour;
3714 if (n == neighbours) /* all would wait for the same client, no need to
3715 create more than just the first task right now */
3716 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3724 * Handle a request to blacklist a peer.
3726 * @param cls closure (always NULL)
3727 * @param client identification of the client
3728 * @param message the actual message
3731 handle_blacklist_reply (void *cls,
3732 struct GNUNET_SERVER_Client *client,
3733 const struct GNUNET_MessageHeader *message)
3735 const struct BlacklistMessage *msg = (const struct BlacklistMessage*) message;
3736 struct Blacklisters *bl;
3737 struct BlacklistCheck *bc;
3740 while ( (bl != NULL) &&
3741 (bl->client != client) )
3746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3747 "Blacklist client disconnected\n");
3749 /* FIXME: other error handling here!? */
3750 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3755 if (ntohl (msg->is_allowed) == GNUNET_SYSERR)
3758 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3759 "Blacklist check failed, peer not allowed\n");
3761 bc->cont (bc->cont_cls, NULL);
3762 GNUNET_CONTAINER_DLL_remove (bc_head, bc_tail, bc);
3768 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3769 "Blacklist check succeeded, continuing with checks\n");
3771 bc->bl_pos = bc->bl_pos->next;
3772 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3775 /* check if any other bc's are waiting for this blacklister */
3779 if ( (bc->bl_pos == bl) &&
3780 (GNUNET_SCHEDULER_NO_TASK == bc->task) )
3781 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3789 * Send periodic PING messages to a given foreign address.
3791 * @param cls our 'struct PeriodicValidationContext*'
3792 * @param tc task context
3795 send_periodic_ping (void *cls,
3796 const struct GNUNET_SCHEDULER_TaskContext *tc)
3798 struct ForeignAddressList *peer_address = cls;
3799 struct TransportPlugin *tp;
3800 struct ValidationEntry *va;
3801 struct NeighbourList *neighbour;
3802 struct TransportPingMessage ping;
3803 struct CheckAddressExistsClosure caec;
3805 uint16_t hello_size;
3809 peer_address->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
3810 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3812 tp = peer_address->ready_list->plugin;
3813 neighbour = peer_address->ready_list->neighbour;
3814 if (GNUNET_YES != neighbour->public_key_valid)
3816 /* no public key yet, try again later */
3817 schedule_next_ping (peer_address);
3820 caec.addr = peer_address->addr;
3821 caec.addrlen = peer_address->addrlen;
3822 caec.tname = tp->short_name;
3823 caec.session = peer_address->session;
3824 caec.exists = GNUNET_NO;
3825 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
3826 &check_address_exists,
3828 if (caec.exists == GNUNET_YES)
3830 /* During validation attempts we will likely trigger the other
3831 peer trying to validate our address which in turn will cause
3832 it to send us its HELLO, so we expect to hit this case rather
3833 frequently. Only print something if we are very verbose. */
3834 #if DEBUG_TRANSPORT > 1
3835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3836 "Some validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
3837 (peer_address->addr != NULL)
3838 ? a2s (tp->short_name,
3840 peer_address->addrlen)
3843 GNUNET_i2s (&neighbour->id));
3845 schedule_next_ping (peer_address);
3848 va = GNUNET_malloc (sizeof (struct ValidationEntry) + peer_address->addrlen);
3849 va->transport_name = GNUNET_strdup (tp->short_name);
3850 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
3852 va->send_time = GNUNET_TIME_absolute_get();
3853 va->session = peer_address->session;
3854 if (peer_address->addr != NULL)
3856 va->addr = (const void*) &va[1];
3857 memcpy (&va[1], peer_address->addr, peer_address->addrlen);
3858 va->addrlen = peer_address->addrlen;
3860 memcpy(&va->publicKey,
3861 &neighbour->publicKey,
3862 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
3864 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
3865 &timeout_hello_validation,
3867 GNUNET_CONTAINER_multihashmap_put (validation_map,
3868 &neighbour->id.hashPubKey,
3870 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3872 if (peer_address->validated != GNUNET_YES)
3873 hello_size = GNUNET_HELLO_size(our_hello);
3877 tsize = sizeof(struct TransportPingMessage) + hello_size;
3879 if (peer_address->addr != NULL)
3881 slen = strlen (tp->short_name) + 1;
3882 tsize += slen + peer_address->addrlen;
3886 slen = 0; /* make gcc happy */
3888 message_buf = GNUNET_malloc(tsize);
3889 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
3890 ping.challenge = htonl(va->challenge);
3891 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
3892 if (peer_address->validated != GNUNET_YES)
3894 memcpy(message_buf, our_hello, hello_size);
3897 if (peer_address->addr != NULL)
3899 ping.header.size = htons(sizeof(struct TransportPingMessage) +
3900 peer_address->addrlen +
3902 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
3905 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
3907 peer_address->addrlen);
3911 ping.header.size = htons(sizeof(struct TransportPingMessage));
3914 memcpy(&message_buf[hello_size],
3916 sizeof(struct TransportPingMessage));
3918 #if DEBUG_TRANSPORT_REVALIDATION
3919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3920 "Performing re-validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s'\n",
3921 (peer_address->addr != NULL)
3922 ? a2s (peer_address->plugin->short_name,
3924 peer_address->addrlen)
3927 GNUNET_i2s (&neighbour->id),
3928 "HELLO", hello_size,
3931 if (peer_address->validated != GNUNET_YES)
3932 GNUNET_STATISTICS_update (stats,
3933 gettext_noop ("# PING with HELLO messages sent"),
3937 GNUNET_STATISTICS_update (stats,
3938 gettext_noop ("# PING without HELLO messages sent"),
3941 GNUNET_STATISTICS_update (stats,
3942 gettext_noop ("# PING messages sent for re-validation"),
3945 transmit_to_peer (NULL, peer_address,
3946 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
3947 HELLO_VERIFICATION_TIMEOUT,
3949 GNUNET_YES, neighbour);
3950 GNUNET_free(message_buf);
3951 schedule_next_ping (peer_address);
3956 * Schedule the job that will cause us to send a PING to the
3957 * foreign address to evaluate its validity and latency.
3959 * @param fal address to PING
3962 schedule_next_ping (struct ForeignAddressList *fal)
3964 struct GNUNET_TIME_Relative delay;
3966 if (fal->revalidate_task != GNUNET_SCHEDULER_NO_TASK)
3968 delay = GNUNET_TIME_absolute_get_remaining (fal->expires);
3969 delay.rel_value /= 2; /* do before expiration */
3970 delay = GNUNET_TIME_relative_min (delay,
3971 LATENCY_EVALUATION_MAX_DELAY);
3972 if (GNUNET_YES != fal->estimated)
3974 delay = GNUNET_TIME_UNIT_ZERO;
3975 fal->estimated = GNUNET_YES;
3977 if (GNUNET_YES == fal->connected)
3979 delay = GNUNET_TIME_relative_min (delay,
3980 CONNECTED_LATENCY_EVALUATION_MAX_DELAY);
3982 /* FIXME: also adjust delay based on how close the last
3983 observed latency is to the latency of the best alternative */
3984 /* bound how fast we can go */
3985 delay = GNUNET_TIME_relative_max (delay,
3986 GNUNET_TIME_UNIT_SECONDS);
3987 /* randomize a bit (to avoid doing all at the same time) */
3988 delay.rel_value += GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1000);
3989 fal->revalidate_task = GNUNET_SCHEDULER_add_delayed(delay,
3990 &send_periodic_ping,
3998 * Function that will be called if we receive some payload
3999 * from another peer.
4001 * @param message the payload
4002 * @param n peer who claimed to be the sender
4005 handle_payload_message (const struct GNUNET_MessageHeader *message,
4006 struct NeighbourList *n)
4008 struct InboundMessage *im;
4009 struct TransportClient *cpos;
4012 msize = ntohs (message->size);
4013 if (n->received_pong == GNUNET_NO)
4016 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4017 "Received message of type %u and size %u from `%4s', but no pong yet!\n",
4018 ntohs (message->type),
4019 ntohs (message->size),
4020 GNUNET_i2s (&n->id));
4022 GNUNET_free_non_null (n->pre_connect_message_buffer);
4023 n->pre_connect_message_buffer = GNUNET_malloc (msize);
4024 memcpy (n->pre_connect_message_buffer, message, msize);
4029 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4030 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
4031 ntohs (message->type),
4032 ntohs (message->size),
4033 GNUNET_i2s (&n->id));
4035 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
4038 n->quota_violation_count++;
4040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4041 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
4042 n->in_tracker.available_bytes_per_s__,
4043 n->quota_violation_count);
4045 /* Discount 32k per violation */
4046 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
4051 if (n->quota_violation_count > 0)
4053 /* try to add 32k back */
4054 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
4056 n->quota_violation_count--;
4059 GNUNET_STATISTICS_update (stats,
4060 gettext_noop ("# payload received from other peers"),
4063 /* transmit message to all clients */
4064 uint32_t ats_count = 2;
4065 size_t size = sizeof (struct InboundMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information) + msize;
4066 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
4069 im = GNUNET_malloc (size);
4070 im->header.size = htons (size);
4071 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
4073 im->ats_count = htonl(ats_count);
4074 /* Setting ATS data */
4075 (&(im->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
4076 (&(im->ats))[0].value = htonl (n->distance);
4077 (&(im->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4078 (&(im->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
4079 (&(im->ats))[ats_count].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
4080 (&(im->ats))[ats_count].value = htonl (0);
4082 memcpy (&((&(im->ats))[ats_count+1]), message, msize);
4084 while (cpos != NULL)
4086 transmit_to_client (cpos, &im->header, GNUNET_YES);
4094 * Iterator over hash map entries. Checks if the given validation
4095 * entry is for the same challenge as what is given in the PONG.
4097 * @param cls the 'struct TransportPongMessage*'
4098 * @param key peer identity
4099 * @param value value in the hash map ('struct ValidationEntry')
4100 * @return GNUNET_YES if we should continue to
4101 * iterate (mismatch), GNUNET_NO if not (entry matched)
4104 check_pending_validation (void *cls,
4105 const GNUNET_HashCode * key,
4108 const struct TransportPongMessage *pong = cls;
4109 struct ValidationEntry *ve = value;
4110 struct AddValidatedAddressContext avac;
4111 unsigned int challenge = ntohl(pong->challenge);
4112 struct GNUNET_HELLO_Message *hello;
4113 struct GNUNET_PeerIdentity target;
4114 struct NeighbourList *n;
4115 struct ForeignAddressList *fal;
4116 struct OwnAddressList *oal;
4117 struct TransportPlugin *tp;
4118 struct GNUNET_MessageHeader *prem;
4124 ps = ntohs (pong->header.size);
4125 if (ps < sizeof (struct TransportPongMessage))
4127 GNUNET_break_op (0);
4130 addr = (const char*) &pong[1];
4131 slen = strlen (ve->transport_name) + 1;
4132 if ( (ps - sizeof (struct TransportPongMessage) < slen) ||
4133 (ve->challenge != challenge) ||
4134 (addr[slen-1] != '\0') ||
4135 (0 != strcmp (addr, ve->transport_name)) ||
4136 (ntohl (pong->purpose.size)
4137 != sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
4139 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
4140 sizeof (struct GNUNET_PeerIdentity) + ps - sizeof (struct TransportPongMessage)) )
4145 alen = ps - sizeof (struct TransportPongMessage) - slen;
4146 switch (ntohl (pong->purpose.purpose))
4148 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN:
4149 if ( (ve->addrlen + slen != ntohl (pong->addrlen)) ||
4150 (0 != memcmp (&addr[slen],
4154 return GNUNET_YES; /* different entry, keep trying! */
4156 if (0 != memcmp (&pong->pid,
4158 sizeof (struct GNUNET_PeerIdentity)))
4160 GNUNET_break_op (0);
4164 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN,
4169 GNUNET_break_op (0);
4174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4175 "Confirmed validity of address, peer `%4s' has address `%s' (%s).\n",
4177 a2s (ve->transport_name,
4178 (const struct sockaddr *) ve->addr,
4180 ve->transport_name);
4183 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING:
4184 if (0 != memcmp (&pong->pid,
4186 sizeof (struct GNUNET_PeerIdentity)))
4189 GNUNET_asprintf(&peer, "%s",GNUNET_i2s (&pong->pid));
4191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4192 "Received PONG for different identity: I am `%s', PONG identity: `%s'\n",
4193 GNUNET_i2s (&my_identity),
4199 if (ve->addrlen != 0)
4201 /* must have been for a different validation entry */
4204 tp = find_transport (ve->transport_name);
4210 oal = tp->addresses;
4213 if ( (oal->addrlen == alen) &&
4214 (0 == memcmp (&oal[1],
4222 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4223 _("Not accepting PONG with address `%s' since I cannot confirm having this address.\n"),
4224 a2s (ve->transport_name,
4230 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING,
4235 GNUNET_break_op (0);
4240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4241 "Confirmed that peer `%4s' is talking to us using address `%s' (%s) for us.\n",
4243 a2s (ve->transport_name,
4246 ve->transport_name);
4250 GNUNET_break_op (0);
4253 if (GNUNET_TIME_absolute_get_remaining (GNUNET_TIME_absolute_ntoh (pong->expiration)).rel_value == 0)
4255 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4256 _("Received expired signature. Check system time.\n"));
4259 GNUNET_STATISTICS_update (stats,
4260 gettext_noop ("# address validation successes"),
4263 /* create the updated HELLO */
4264 GNUNET_CRYPTO_hash (&ve->publicKey,
4265 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4266 &target.hashPubKey);
4267 if (ve->addr != NULL)
4269 avac.done = GNUNET_NO;
4271 hello = GNUNET_HELLO_create (&ve->publicKey,
4272 &add_validated_address,
4274 GNUNET_PEERINFO_add_peer (peerinfo,
4276 GNUNET_free (hello);
4278 n = find_neighbour (&target);
4281 n->publicKey = ve->publicKey;
4282 n->public_key_valid = GNUNET_YES;
4283 fal = add_peer_address (n,
4288 GNUNET_assert (fal != NULL);
4289 fal->expires = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
4290 fal->validated = GNUNET_YES;
4291 mark_address_connected (fal);
4292 GNUNET_STATISTICS_update (stats,
4293 gettext_noop ("# peer addresses considered valid"),
4296 fal->latency = GNUNET_TIME_absolute_get_duration (ve->send_time);
4297 update_addr_value (fal, GNUNET_TIME_absolute_get_duration (ve->send_time).rel_value, GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4299 schedule_next_ping (fal);
4300 if (n->latency.rel_value == GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
4301 n->latency = fal->latency;
4303 n->latency.rel_value = (fal->latency.rel_value + n->latency.rel_value) / 2;
4305 n->distance = fal->distance;
4306 if (GNUNET_NO == n->received_pong)
4308 n->received_pong = GNUNET_YES;
4310 notify_clients_connect (&target, n->latency, n->distance);
4311 if (NULL != (prem = n->pre_connect_message_buffer))
4313 n->pre_connect_message_buffer = NULL;
4314 handle_payload_message (prem, n);
4318 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4320 GNUNET_SCHEDULER_cancel (n->retry_task);
4321 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4322 try_transmission_to_peer (n);
4326 /* clean up validation entry */
4327 GNUNET_assert (GNUNET_YES ==
4328 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4331 abort_validation (NULL, NULL, ve);
4337 * Function that will be called if we receive a validation
4338 * of an address challenge that we transmitted to another
4339 * peer. Note that the validation should only be considered
4340 * acceptable if the challenge matches AND if the sender
4341 * address is at least a plausible address for this peer
4342 * (otherwise we may be seeing a MiM attack).
4344 * @param cls closure
4345 * @param message the pong message
4346 * @param peer who responded to our challenge
4347 * @param sender_address string describing our sender address (as observed
4348 * by the other peer in binary format)
4349 * @param sender_address_len number of bytes in 'sender_address'
4352 handle_pong (void *cls, const struct GNUNET_MessageHeader *message,
4353 const struct GNUNET_PeerIdentity *peer,
4354 const char *sender_address,
4355 size_t sender_address_len)
4357 #if DEBUG_TRANSPORT > 1
4358 /* we get tons of these that just get discarded, only log
4359 if we are quite verbose */
4360 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4361 "Receiving `%s' message from `%4s'.\n", "PONG",
4364 GNUNET_STATISTICS_update (stats,
4365 gettext_noop ("# PONG messages received"),
4368 if (GNUNET_SYSERR !=
4369 GNUNET_CONTAINER_multihashmap_get_multiple (validation_map,
4371 &check_pending_validation,
4374 /* This is *expected* to happen a lot since we send
4375 PONGs to *all* known addresses of the sender of
4376 the PING, so most likely we get multiple PONGs
4377 per PING, and all but the first PONG will end up
4378 here. So really we should not print anything here
4379 unless we want to be very, very verbose... */
4380 #if DEBUG_TRANSPORT > 2
4381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4382 "Received `%s' message from `%4s' but have no record of a matching `%s' message. Ignoring.\n",
4394 * Try to validate a neighbour's address by sending him our HELLO and a PING.
4396 * @param cls the 'struct ValidationEntry*'
4397 * @param neighbour neighbour to validate, NULL if validation failed
4400 transmit_hello_and_ping (void *cls,
4401 struct NeighbourList *neighbour)
4403 struct ValidationEntry *va = cls;
4404 struct ForeignAddressList *peer_address;
4405 struct TransportPingMessage ping;
4406 uint16_t hello_size;
4409 struct GNUNET_PeerIdentity id;
4412 GNUNET_CRYPTO_hash (&va->publicKey,
4413 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4415 if (neighbour == NULL)
4417 /* FIXME: stats... */
4418 GNUNET_break (GNUNET_OK ==
4419 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4422 abort_validation (NULL, NULL, va);
4425 neighbour->publicKey = va->publicKey;
4426 neighbour->public_key_valid = GNUNET_YES;
4427 peer_address = add_peer_address (neighbour,
4428 va->transport_name, NULL,
4429 (const void*) &va[1],
4431 if (peer_address == NULL)
4433 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4434 "Failed to add peer `%4s' for plugin `%s'\n",
4435 GNUNET_i2s (&neighbour->id),
4436 va->transport_name);
4437 GNUNET_break (GNUNET_OK ==
4438 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4441 abort_validation (NULL, NULL, va);
4444 hello_size = GNUNET_HELLO_size(our_hello);
4445 slen = strlen(va->transport_name) + 1;
4446 tsize = sizeof(struct TransportPingMessage) + hello_size + va->addrlen + slen;
4447 message_buf = GNUNET_malloc(tsize);
4448 ping.challenge = htonl(va->challenge);
4449 ping.header.size = htons(sizeof(struct TransportPingMessage) + slen + va->addrlen);
4450 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
4451 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
4452 memcpy(message_buf, our_hello, hello_size);
4453 memcpy(&message_buf[hello_size],
4455 sizeof(struct TransportPingMessage));
4456 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
4459 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
4463 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4464 "Performing validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s' (%u bytes)\n",
4467 : a2s (va->transport_name,
4468 (const void*) &va[1], va->addrlen),
4470 GNUNET_i2s (&neighbour->id),
4471 "HELLO", hello_size,
4472 "PING", sizeof (struct TransportPingMessage) + va->addrlen + slen);
4475 GNUNET_STATISTICS_update (stats,
4476 gettext_noop ("# PING messages sent for initial validation"),
4479 transmit_to_peer (NULL, peer_address,
4480 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
4481 HELLO_VERIFICATION_TIMEOUT,
4483 GNUNET_YES, neighbour);
4484 GNUNET_free(message_buf);
4489 * Check if the given address is already being validated; if not,
4490 * append the given address to the list of entries that are being be
4491 * validated and initiate validation.
4493 * @param cls closure ('struct CheckHelloValidatedContext *')
4494 * @param tname name of the transport
4495 * @param expiration expiration time
4496 * @param addr the address
4497 * @param addrlen length of the address
4498 * @return GNUNET_OK (always)
4501 run_validation (void *cls,
4503 struct GNUNET_TIME_Absolute expiration,
4507 struct CheckHelloValidatedContext *chvc = cls;
4508 struct GNUNET_PeerIdentity id;
4509 struct TransportPlugin *tp;
4510 struct ValidationEntry *va;
4511 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4512 struct CheckAddressExistsClosure caec;
4513 struct OwnAddressList *oal;
4515 GNUNET_assert (addr != NULL);
4517 GNUNET_STATISTICS_update (stats,
4518 gettext_noop ("# peer addresses scheduled for validation"),
4521 tp = find_transport (tname);
4524 GNUNET_log (GNUNET_ERROR_TYPE_INFO |
4525 GNUNET_ERROR_TYPE_BULK,
4527 ("Transport `%s' not loaded, will not try to validate peer address using this transport.\n"),
4529 GNUNET_STATISTICS_update (stats,
4530 gettext_noop ("# peer addresses not validated (plugin not available)"),
4535 /* check if this is one of our own addresses */
4536 oal = tp->addresses;
4539 if ( (oal->addrlen == addrlen) &&
4540 (0 == memcmp (&oal[1],
4544 /* not plausible, this address is equivalent to our own address! */
4545 GNUNET_STATISTICS_update (stats,
4546 gettext_noop ("# peer addresses not validated (loopback)"),
4553 GNUNET_HELLO_get_key (chvc->hello, &pk);
4554 GNUNET_CRYPTO_hash (&pk,
4556 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4559 if (is_blacklisted(&id, tp))
4562 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4563 "Attempted to validate blacklisted peer `%s' using `%s'!\n",
4571 caec.addrlen = addrlen;
4572 caec.session = NULL;
4574 caec.exists = GNUNET_NO;
4575 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
4576 &check_address_exists,
4578 if (caec.exists == GNUNET_YES)
4580 /* During validation attempts we will likely trigger the other
4581 peer trying to validate our address which in turn will cause
4582 it to send us its HELLO, so we expect to hit this case rather
4583 frequently. Only print something if we are very verbose. */
4584 #if DEBUG_TRANSPORT > 1
4585 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4586 "Validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
4587 a2s (tname, addr, addrlen),
4591 GNUNET_STATISTICS_update (stats,
4592 gettext_noop ("# peer addresses not validated (in progress)"),
4597 va = GNUNET_malloc (sizeof (struct ValidationEntry) + addrlen);
4600 va->transport_name = GNUNET_strdup (tname);
4601 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
4603 va->send_time = GNUNET_TIME_absolute_get();
4604 va->addr = (const void*) &va[1];
4605 memcpy (&va[1], addr, addrlen);
4606 va->addrlen = addrlen;
4607 GNUNET_HELLO_get_key (chvc->hello,
4609 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
4610 &timeout_hello_validation,
4612 GNUNET_CONTAINER_multihashmap_put (validation_map,
4615 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4616 setup_peer_check_blacklist (&id, GNUNET_NO,
4617 &transmit_hello_and_ping,
4624 * Check if addresses in validated hello "h" overlap with
4625 * those in "chvc->hello" and validate the rest.
4627 * @param cls closure
4628 * @param peer id of the peer, NULL for last call
4629 * @param h hello message for the peer (can be NULL)
4630 * @param err_msg NULL if successful, otherwise contains error message
4633 check_hello_validated (void *cls,
4634 const struct GNUNET_PeerIdentity *peer,
4635 const struct GNUNET_HELLO_Message *h,
4636 const char *err_msg)
4638 struct CheckHelloValidatedContext *chvc = cls;
4639 struct GNUNET_HELLO_Message *plain_hello;
4640 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4641 struct GNUNET_PeerIdentity target;
4642 struct NeighbourList *n;
4644 if (err_msg != NULL)
4647 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4648 _("Error in communication with PEERINFO service: %s\n"),
4656 GNUNET_STATISTICS_update (stats,
4657 gettext_noop ("# outstanding peerinfo iterate requests"),
4661 if (GNUNET_NO == chvc->hello_known)
4663 /* notify PEERINFO about the peer now, so that we at least
4664 have the public key if some other component needs it */
4665 GNUNET_HELLO_get_key (chvc->hello, &pk);
4666 GNUNET_CRYPTO_hash (&pk,
4667 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4668 &target.hashPubKey);
4669 plain_hello = GNUNET_HELLO_create (&pk,
4672 GNUNET_PEERINFO_add_peer (peerinfo, plain_hello);
4673 GNUNET_free (plain_hello);
4674 #if DEBUG_TRANSPORT_HELLO
4675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4676 "PEERINFO had no `%s' message for peer `%4s', full validation needed.\n",
4678 GNUNET_i2s (&target));
4680 GNUNET_STATISTICS_update (stats,
4681 gettext_noop ("# new HELLOs requiring full validation"),
4684 GNUNET_HELLO_iterate_addresses (chvc->hello,
4691 GNUNET_STATISTICS_update (stats,
4692 gettext_noop ("# duplicate HELLO (peer known)"),
4697 if (chvc->ve_count == 0)
4699 GNUNET_CONTAINER_DLL_remove (chvc_head,
4708 #if DEBUG_TRANSPORT_HELLO
4709 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4710 "PEERINFO had `%s' message for peer `%4s', validating only new addresses.\n",
4714 chvc->hello_known = GNUNET_YES;
4715 n = find_neighbour (peer);
4718 #if DEBUG_TRANSPORT_HELLO
4719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4720 "Calling hello_iterate_addresses for %s!\n",
4723 GNUNET_HELLO_iterate_addresses (h,
4725 &add_to_foreign_address_list,
4727 try_transmission_to_peer (n);
4731 #if DEBUG_TRANSPORT_HELLO
4732 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4733 "No existing neighbor record for %s!\n",
4736 GNUNET_STATISTICS_update (stats,
4737 gettext_noop ("# no existing neighbour record (validating HELLO)"),
4741 GNUNET_STATISTICS_update (stats,
4742 gettext_noop ("# HELLO validations (update case)"),
4745 GNUNET_HELLO_iterate_new_addresses (chvc->hello,
4747 GNUNET_TIME_relative_to_absolute (HELLO_REVALIDATION_START_TIME),
4754 * Process HELLO-message.
4756 * @param plugin transport involved, may be NULL
4757 * @param message the actual message
4758 * @return GNUNET_OK if the HELLO was well-formed, GNUNET_SYSERR otherwise
4761 process_hello (struct TransportPlugin *plugin,
4762 const struct GNUNET_MessageHeader *message)
4765 struct GNUNET_PeerIdentity target;
4766 const struct GNUNET_HELLO_Message *hello;
4767 struct CheckHelloValidatedContext *chvc;
4768 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
4769 #if DEBUG_TRANSPORT_HELLO > 2
4772 hsize = ntohs (message->size);
4773 if ((ntohs (message->type) != GNUNET_MESSAGE_TYPE_HELLO) ||
4774 (hsize < sizeof (struct GNUNET_MessageHeader)))
4777 return GNUNET_SYSERR;
4779 GNUNET_STATISTICS_update (stats,
4780 gettext_noop ("# HELLOs received for validation"),
4784 /* first, check if load is too high */
4785 if (GNUNET_SCHEDULER_get_load (GNUNET_SCHEDULER_PRIORITY_BACKGROUND) > MAX_HELLO_LOAD)
4787 GNUNET_STATISTICS_update (stats,
4788 gettext_noop ("# HELLOs ignored due to high load"),
4791 #if DEBUG_TRANSPORT_HELLO
4792 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4793 "Ignoring `%s' for `%4s', load too high.\n",
4795 GNUNET_i2s (&target));
4799 hello = (const struct GNUNET_HELLO_Message *) message;
4800 if (GNUNET_OK != GNUNET_HELLO_get_key (hello, &publicKey))
4802 #if DEBUG_TRANSPORT_HELLO
4803 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4804 "Unable to get public key from `%s' for `%4s'!\n",
4806 GNUNET_i2s (&target));
4808 GNUNET_break_op (0);
4809 return GNUNET_SYSERR;
4812 GNUNET_CRYPTO_hash (&publicKey,
4813 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4814 &target.hashPubKey);
4816 #if DEBUG_TRANSPORT_HELLO
4817 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4818 "Received `%s' message for `%4s'\n",
4820 GNUNET_i2s (&target));
4823 if (0 == memcmp (&my_identity,
4825 sizeof (struct GNUNET_PeerIdentity)))
4827 GNUNET_STATISTICS_update (stats,
4828 gettext_noop ("# HELLOs ignored for validation (is my own HELLO)"),
4834 while (NULL != chvc)
4836 if (GNUNET_HELLO_equals (hello,
4838 GNUNET_TIME_absolute_get ()).abs_value > 0)
4840 #if DEBUG_TRANSPORT_HELLO > 2
4841 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4842 "Received duplicate `%s' message for `%4s'; ignored\n",
4844 GNUNET_i2s (&target));
4846 return GNUNET_OK; /* validation already pending */
4848 if (GNUNET_HELLO_size(hello) == GNUNET_HELLO_size (chvc->hello))
4849 GNUNET_break (0 != memcmp (hello, chvc->hello,
4850 GNUNET_HELLO_size(hello)));
4855 struct NeighbourList *temp_neighbor = find_neighbour(&target);
4856 if ((NULL != temp_neighbor))
4858 fprintf(stderr, "Already know peer, ignoring hello\n");
4863 #if DEBUG_TRANSPORT_HELLO > 2
4866 my_id = GNUNET_strdup(GNUNET_i2s(plugin->env.my_identity));
4868 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4869 "%s: Starting validation of `%s' message for `%4s' via '%s' of size %u\n",
4872 GNUNET_i2s (&target),
4874 GNUNET_HELLO_size(hello));
4879 chvc = GNUNET_malloc (sizeof (struct CheckHelloValidatedContext) + hsize);
4881 chvc->hello = (const struct GNUNET_HELLO_Message *) &chvc[1];
4882 memcpy (&chvc[1], hello, hsize);
4883 GNUNET_CONTAINER_DLL_insert (chvc_head,
4886 /* finally, check if HELLO was previously validated
4887 (continuation will then schedule actual validation) */
4888 GNUNET_STATISTICS_update (stats,
4889 gettext_noop ("# peerinfo process hello iterate requests"),
4892 GNUNET_STATISTICS_update (stats,
4893 gettext_noop ("# outstanding peerinfo iterate requests"),
4896 chvc->piter = GNUNET_PEERINFO_iterate (peerinfo,
4898 HELLO_VERIFICATION_TIMEOUT,
4899 &check_hello_validated, chvc);
4905 * The peer specified by the given neighbour has timed-out or a plugin
4906 * has disconnected. We may either need to do nothing (other plugins
4907 * still up), or trigger a full disconnect and clean up. This
4908 * function updates our state and does the necessary notifications.
4909 * Also notifies our clients that the neighbour is now officially
4912 * @param n the neighbour list entry for the peer
4913 * @param check GNUNET_YES to check if ALL addresses for this peer
4914 * are gone, GNUNET_NO to force a disconnect of the peer
4915 * regardless of whether other addresses exist.
4918 disconnect_neighbour (struct NeighbourList *n, int check)
4920 struct ReadyList *rpos;
4921 struct NeighbourList *npos;
4922 struct NeighbourList *nprev;
4923 struct MessageQueue *mq;
4924 struct ForeignAddressList *peer_addresses;
4925 struct ForeignAddressList *peer_pos;
4927 if (GNUNET_YES == check)
4930 while (NULL != rpos)
4932 peer_addresses = rpos->addresses;
4933 while (peer_addresses != NULL)
4935 // Do not disconnect if: an address is connected or an inbound address exists
4936 if ((GNUNET_YES == peer_addresses->connected) || (peer_addresses->addrlen == 0))
4939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4940 "NOT Disconnecting from `%4s', still have live addresses!\n",
4941 GNUNET_i2s (&n->id));
4943 return; /* still connected */
4945 peer_addresses = peer_addresses->next;
4951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4952 "Disconnecting from `%4s'\n",
4953 GNUNET_i2s (&n->id));
4955 /* remove n from neighbours list */
4958 while ((npos != NULL) && (npos != n))
4963 GNUNET_assert (npos != NULL);
4965 neighbours = n->next;
4967 nprev->next = n->next;
4969 /* notify all clients about disconnect */
4970 if (GNUNET_YES == n->received_pong)
4971 notify_clients_disconnect (&n->id);
4973 /* clean up all plugins, cancel connections and pending transmissions */
4974 while (NULL != (rpos = n->plugins))
4976 n->plugins = rpos->next;
4977 rpos->plugin->api->disconnect (rpos->plugin->api->cls, &n->id);
4978 while (rpos->addresses != NULL)
4980 peer_pos = rpos->addresses;
4981 rpos->addresses = peer_pos->next;
4982 if (peer_pos->connected == GNUNET_YES)
4983 GNUNET_STATISTICS_update (stats,
4984 gettext_noop ("# connected addresses"),
4987 if (GNUNET_YES == peer_pos->validated)
4988 GNUNET_STATISTICS_update (stats,
4989 gettext_noop ("# peer addresses considered valid"),
4992 if (GNUNET_SCHEDULER_NO_TASK != peer_pos->revalidate_task)
4994 GNUNET_SCHEDULER_cancel (peer_pos->revalidate_task);
4995 peer_pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
4997 GNUNET_free(peer_pos->ressources);
4998 peer_pos->ressources = NULL;
4999 GNUNET_free(peer_pos->quality);
5000 peer_pos->ressources = NULL;
5001 GNUNET_free(peer_pos);
5002 ats->stat.recreate_problem = GNUNET_YES;
5007 /* free all messages on the queue */
5008 while (NULL != (mq = n->messages_head))
5010 GNUNET_STATISTICS_update (stats,
5011 gettext_noop ("# bytes in message queue for other peers"),
5012 - (int64_t) mq->message_buf_size,
5014 GNUNET_STATISTICS_update (stats,
5015 gettext_noop ("# bytes discarded due to disconnect"),
5016 mq->message_buf_size,
5018 GNUNET_CONTAINER_DLL_remove (n->messages_head,
5021 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
5023 sizeof(struct GNUNET_PeerIdentity)));
5026 if (n->timeout_task != GNUNET_SCHEDULER_NO_TASK)
5028 GNUNET_SCHEDULER_cancel (n->timeout_task);
5029 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
5031 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
5033 GNUNET_SCHEDULER_cancel (n->retry_task);
5034 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
5036 if (n->piter != NULL)
5038 GNUNET_PEERINFO_iterate_cancel (n->piter);
5039 GNUNET_STATISTICS_update (stats,
5040 gettext_noop ("# outstanding peerinfo iterate requests"),
5045 /* finally, free n itself */
5046 GNUNET_STATISTICS_update (stats,
5047 gettext_noop ("# active neighbours"),
5050 GNUNET_free_non_null (n->pre_connect_message_buffer);
5056 * We have received a PING message from someone. Need to send a PONG message
5057 * in response to the peer by any means necessary.
5060 handle_ping(void *cls, const struct GNUNET_MessageHeader *message,
5061 const struct GNUNET_PeerIdentity *peer,
5062 struct Session *session,
5063 const char *sender_address,
5064 uint16_t sender_address_len)
5066 struct TransportPlugin *plugin = cls;
5067 struct SessionHeader *session_header = (struct SessionHeader*) session;
5068 struct TransportPingMessage *ping;
5069 struct TransportPongMessage *pong;
5070 struct NeighbourList *n;
5071 struct ReadyList *rl;
5072 struct ForeignAddressList *fal;
5073 struct OwnAddressList *oal;
5078 if (ntohs (message->size) < sizeof (struct TransportPingMessage))
5080 GNUNET_break_op (0);
5081 return GNUNET_SYSERR;
5084 ping = (struct TransportPingMessage *) message;
5085 if (0 != memcmp (&ping->target,
5086 plugin->env.my_identity,
5087 sizeof (struct GNUNET_PeerIdentity)))
5090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5091 _("Received `%s' message from `%s' destined for `%s' which is not me!\n"),
5093 (sender_address != NULL)
5094 ? a2s (plugin->short_name,
5095 (const struct sockaddr *)sender_address,
5098 GNUNET_i2s (&ping->target));
5100 return GNUNET_SYSERR;
5103 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
5104 "Processing `%s' from `%s'\n",
5106 (sender_address != NULL)
5107 ? a2s (plugin->short_name,
5108 (const struct sockaddr *)sender_address,
5112 GNUNET_STATISTICS_update (stats,
5113 gettext_noop ("# PING messages received"),
5116 addr = (const char*) &ping[1];
5117 alen = ntohs (message->size) - sizeof (struct TransportPingMessage);
5118 slen = strlen (plugin->short_name) + 1;
5121 /* peer wants to confirm that we have an outbound connection to him */
5122 if (session == NULL)
5124 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5125 _("Refusing to create PONG since I do not have a session with `%s'.\n"),
5127 return GNUNET_SYSERR;
5129 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5130 pong->header.size = htons (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5131 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5132 pong->purpose.size =
5133 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5135 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5136 sizeof (struct GNUNET_PeerIdentity) + sender_address_len + slen);
5137 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING);
5138 pong->challenge = ping->challenge;
5139 pong->addrlen = htonl(sender_address_len + slen);
5142 sizeof(struct GNUNET_PeerIdentity));
5146 if ((sender_address!=NULL) && (sender_address_len > 0))
5147 memcpy (&((char*)&pong[1])[slen],
5149 sender_address_len);
5150 if (GNUNET_TIME_absolute_get_remaining (session_header->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4)
5152 /* create / update cached sig */
5154 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5155 "Creating PONG signature to indicate active connection.\n");
5157 session_header->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5158 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5159 GNUNET_assert (GNUNET_OK ==
5160 GNUNET_CRYPTO_rsa_sign (my_private_key,
5162 &session_header->pong_signature));
5166 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5168 memcpy (&pong->signature,
5169 &session_header->pong_signature,
5170 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5176 /* peer wants to confirm that this is one of our addresses */
5180 plugin->api->check_address (plugin->api->cls,
5184 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5185 _("Not confirming PING with address `%s' since I cannot confirm having this address.\n"),
5186 a2s (plugin->short_name,
5191 oal = plugin->addresses;
5194 if ( (oal->addrlen == alen) &&
5201 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + alen + slen);
5202 pong->header.size = htons (sizeof (struct TransportPongMessage) + alen + slen);
5203 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5204 pong->purpose.size =
5205 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5207 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5208 sizeof (struct GNUNET_PeerIdentity) + alen + slen);
5209 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN);
5210 pong->challenge = ping->challenge;
5211 pong->addrlen = htonl(alen + slen);
5214 sizeof(struct GNUNET_PeerIdentity));
5215 memcpy (&pong[1], plugin->short_name, slen);
5216 memcpy (&((char*)&pong[1])[slen], addr, alen);
5217 if ( (oal != NULL) &&
5218 (GNUNET_TIME_absolute_get_remaining (oal->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4) )
5220 /* create / update cached sig */
5222 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5223 "Creating PONG signature to indicate ownership.\n");
5225 oal->pong_sig_expires = GNUNET_TIME_absolute_min (oal->expires,
5226 GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5227 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5228 GNUNET_assert (GNUNET_OK ==
5229 GNUNET_CRYPTO_rsa_sign (my_private_key,
5231 &oal->pong_signature));
5232 memcpy (&pong->signature,
5233 &oal->pong_signature,
5234 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5236 else if (oal == NULL)
5238 /* not using cache (typically DV-only) */
5239 pong->expiration = GNUNET_TIME_absolute_hton (GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5240 GNUNET_assert (GNUNET_OK ==
5241 GNUNET_CRYPTO_rsa_sign (my_private_key,
5247 /* can used cached version */
5248 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5249 memcpy (&pong->signature,
5250 &oal->pong_signature,
5251 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5254 n = find_neighbour(peer);
5255 GNUNET_assert (n != NULL);
5256 /* first try reliable response transmission */
5260 fal = rl->addresses;
5263 if (-1 != rl->plugin->api->send (rl->plugin->api->cls,
5266 ntohs (pong->header.size),
5267 TRANSPORT_PONG_PRIORITY,
5268 HELLO_VERIFICATION_TIMEOUT,
5276 GNUNET_STATISTICS_update (stats,
5277 gettext_noop ("# PONGs unicast via reliable transport"),
5287 /* no reliable method found, do multicast */
5288 GNUNET_STATISTICS_update (stats,
5289 gettext_noop ("# PONGs multicast to all available addresses"),
5295 fal = rl->addresses;
5298 transmit_to_peer(NULL, fal,
5299 TRANSPORT_PONG_PRIORITY,
5300 HELLO_VERIFICATION_TIMEOUT,
5302 ntohs(pong->header.size),
5318 * Function called by the plugin for each received message.
5319 * Update data volumes, possibly notify plugins about
5320 * reducing the rate at which they read from the socket
5321 * and generally forward to our receive callback.
5323 * @param cls the "struct TransportPlugin *" we gave to the plugin
5324 * @param peer (claimed) identity of the other peer
5325 * @param message the message, NULL if we only care about
5326 * learning about the delay until we should receive again
5327 * @param ats_data information for automatic transport selection
5328 * @param ats_count number of elements in ats not including 0-terminator
5329 * @param session identifier used for this session (can be NULL)
5330 * @param sender_address binary address of the sender (if observed)
5331 * @param sender_address_len number of bytes in sender_address
5332 * @return how long in ms the plugin should wait until receiving more data
5333 * (plugins that do not support this, can ignore the return value)
5335 static struct GNUNET_TIME_Relative
5336 plugin_env_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
5337 const struct GNUNET_MessageHeader *message,
5338 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
5340 struct Session *session,
5341 const char *sender_address,
5342 uint16_t sender_address_len)
5344 struct TransportPlugin *plugin = cls;
5345 struct ReadyList *service_context;
5346 struct ForeignAddressList *peer_address;
5348 struct NeighbourList *n;
5349 struct GNUNET_TIME_Relative ret;
5353 if (is_blacklisted (peer, plugin))
5354 return GNUNET_TIME_UNIT_FOREVER_REL;
5355 n = find_neighbour (peer);
5357 n = setup_new_neighbour (peer, GNUNET_YES);
5358 service_context = n->plugins;
5359 while ((service_context != NULL) && (plugin != service_context->plugin))
5360 service_context = service_context->next;
5361 GNUNET_assert ((plugin->api->send == NULL) || (service_context != NULL));
5362 peer_address = NULL;
5365 for (c=0; c<ats_count; c++)
5366 if (ntohl(ats_data[c].type) == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
5367 distance = ntohl(ats_data[c].value);
5369 /* notify ATS about incoming data */
5370 //ats_notify_ats_data(peer, ats_data);
5372 if (message != NULL)
5374 if ( (session != NULL) ||
5375 (sender_address != NULL) )
5376 peer_address = add_peer_address (n,
5380 sender_address_len);
5381 if (peer_address != NULL)
5383 update_addr_ats(peer_address, ats_data, ats_count);
5384 update_addr_value(peer_address, distance, GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5386 peer_address->distance = distance;
5387 if (GNUNET_YES == peer_address->validated)
5388 mark_address_connected (peer_address);
5389 peer_address->timeout
5390 = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5391 schedule_next_ping (peer_address);
5393 /* update traffic received amount ... */
5394 msize = ntohs (message->size);
5396 GNUNET_STATISTICS_update (stats,
5397 gettext_noop ("# bytes received from other peers"),
5400 n->distance = distance;
5402 GNUNET_TIME_relative_to_absolute
5403 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5404 GNUNET_SCHEDULER_cancel (n->timeout_task);
5406 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
5407 &neighbour_timeout_task, n);
5408 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
5410 /* dropping message due to frequent inbound volume violations! */
5411 GNUNET_log (GNUNET_ERROR_TYPE_WARNING |
5412 GNUNET_ERROR_TYPE_BULK,
5414 ("Dropping incoming message due to repeated bandwidth quota (%u b/s) violations (total of %u).\n"),
5415 n->in_tracker.available_bytes_per_s__,
5416 n->quota_violation_count);
5417 GNUNET_STATISTICS_update (stats,
5418 gettext_noop ("# bandwidth quota violations by other peers"),
5421 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
5423 if ((ntohs(message->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_ATS) &&
5424 (ntohs(message->size) == (sizeof (struct GNUNET_MessageHeader) + sizeof (uint32_t))))
5426 uint32_t value = ntohl(*((uint32_t *) &message[1]));
5427 //GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "GNUNET_MESSAGE_TYPE_TRANSPORT_ATS: %i \n", value);
5428 /* Force ressource and quality update */
5431 ats->stat.modified_resources = GNUNET_YES;
5432 ats->stat.modified_quality = GNUNET_YES;
5434 /* Force cost update */
5436 ats->stat.modified_resources = GNUNET_YES;
5437 /* Force quality update */
5439 ats->stat.modified_quality = GNUNET_YES;
5440 /* Force full rebuild */
5442 ats->stat.recreate_problem = GNUNET_YES;
5446 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5447 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
5448 ntohs (message->type),
5449 ntohs (message->size),
5452 switch (ntohs (message->type))
5454 case GNUNET_MESSAGE_TYPE_HELLO:
5455 GNUNET_STATISTICS_update (stats,
5456 gettext_noop ("# HELLO messages received from other peers"),
5459 process_hello (plugin, message);
5461 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
5462 handle_ping (plugin, message, peer, session, sender_address, sender_address_len);
5464 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
5465 handle_pong (plugin, message, peer, sender_address, sender_address_len);
5467 case GNUNET_MESSAGE_TYPE_TRANSPORT_ATS:
5470 handle_payload_message (message, n);
5474 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 0);
5475 if (ret.rel_value > 0)
5478 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5479 "Throttling read (%llu bytes excess at %u b/s), waiting %llu ms before reading more.\n",
5480 (unsigned long long) n->in_tracker.consumption_since_last_update__,
5481 (unsigned int) n->in_tracker.available_bytes_per_s__,
5482 (unsigned long long) ret.rel_value);
5484 GNUNET_STATISTICS_update (stats,
5485 gettext_noop ("# ms throttling suggested"),
5486 (int64_t) ret.rel_value,
5493 * Handle START-message. This is the first message sent to us
5494 * by any client which causes us to add it to our list.
5496 * @param cls closure (always NULL)
5497 * @param client identification of the client
5498 * @param message the actual message
5501 handle_start (void *cls,
5502 struct GNUNET_SERVER_Client *client,
5503 const struct GNUNET_MessageHeader *message)
5505 const struct StartMessage *start;
5506 struct TransportClient *c;
5507 struct ConnectInfoMessage * cim;
5508 struct NeighbourList *n;
5512 start = (const struct StartMessage*) message;
5514 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5515 "Received `%s' request from client\n", "START");
5520 if (c->client == client)
5522 /* client already on our list! */
5524 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5529 if ( (GNUNET_NO != ntohl (start->do_check)) &&
5530 (0 != memcmp (&start->self,
5532 sizeof (struct GNUNET_PeerIdentity))) )
5534 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5535 _("Rejecting control connection from peer `%s', which is not me!\n"),
5536 GNUNET_i2s (&start->self));
5537 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5540 c = GNUNET_malloc (sizeof (struct TransportClient));
5544 if (our_hello != NULL)
5547 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5548 "Sending our own `%s' to new client\n", "HELLO");
5550 transmit_to_client (c,
5551 (const struct GNUNET_MessageHeader *) our_hello,
5553 /* tell new client about all existing connections */
5555 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
5556 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
5560 cim = GNUNET_malloc (size);
5561 cim->header.size = htons (size);
5562 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
5563 cim->ats_count = htonl(ats_count);
5564 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
5565 (&(cim->ats))[2].value = htonl (0);
5569 if (GNUNET_YES == n->received_pong)
5571 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5572 (&(cim->ats))[0].value = htonl (n->distance);
5573 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
5574 (&(cim->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
5576 transmit_to_client (c, &cim->header, GNUNET_NO);
5582 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5587 * Handle HELLO-message.
5589 * @param cls closure (always NULL)
5590 * @param client identification of the client
5591 * @param message the actual message
5594 handle_hello (void *cls,
5595 struct GNUNET_SERVER_Client *client,
5596 const struct GNUNET_MessageHeader *message)
5600 GNUNET_STATISTICS_update (stats,
5601 gettext_noop ("# HELLOs received from clients"),
5604 ret = process_hello (NULL, message);
5605 GNUNET_SERVER_receive_done (client, ret);
5610 * Closure for 'transmit_client_message'; followed by
5611 * 'msize' bytes of the actual message.
5613 struct TransmitClientMessageContext
5616 * Client on whom's behalf we are sending.
5618 struct GNUNET_SERVER_Client *client;
5621 * Timeout for the transmission.
5623 struct GNUNET_TIME_Absolute timeout;
5631 * Size of the message in bytes.
5638 * Schedule transmission of a message we got from a client to a peer.
5640 * @param cls the 'struct TransmitClientMessageContext*'
5641 * @param n destination, or NULL on error (in that case, drop the message)
5644 transmit_client_message (void *cls,
5645 struct NeighbourList *n)
5647 struct TransmitClientMessageContext *tcmc = cls;
5648 struct TransportClient *tc;
5651 while ((tc != NULL) && (tc->client != tcmc->client))
5656 transmit_to_peer (tc, NULL, tcmc->priority,
5657 GNUNET_TIME_absolute_get_remaining (tcmc->timeout),
5659 tcmc->msize, GNUNET_NO, n);
5661 GNUNET_SERVER_receive_done (tcmc->client, GNUNET_OK);
5662 GNUNET_SERVER_client_drop (tcmc->client);
5668 * Handle SEND-message.
5670 * @param cls closure (always NULL)
5671 * @param client identification of the client
5672 * @param message the actual message
5675 handle_send (void *cls,
5676 struct GNUNET_SERVER_Client *client,
5677 const struct GNUNET_MessageHeader *message)
5679 const struct OutboundMessage *obm;
5680 const struct GNUNET_MessageHeader *obmm;
5681 struct TransmitClientMessageContext *tcmc;
5685 size = ntohs (message->size);
5687 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
5690 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5693 GNUNET_STATISTICS_update (stats,
5694 gettext_noop ("# payload received for other peers"),
5697 obm = (const struct OutboundMessage *) message;
5698 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
5699 msize = size - sizeof (struct OutboundMessage);
5701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5702 "Received `%s' request from client with target `%4s' and message of type %u and size %u\n",
5703 "SEND", GNUNET_i2s (&obm->peer),
5707 tcmc = GNUNET_malloc (sizeof (struct TransmitClientMessageContext) + msize);
5708 tcmc->client = client;
5709 tcmc->priority = ntohl (obm->priority);
5710 tcmc->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_ntoh (obm->timeout));
5711 tcmc->msize = msize;
5712 /* FIXME: this memcpy can be up to 7% of our total runtime */
5713 memcpy (&tcmc[1], obmm, msize);
5714 GNUNET_SERVER_client_keep (client);
5715 setup_peer_check_blacklist (&obm->peer, GNUNET_YES,
5716 &transmit_client_message,
5722 * Handle request connect message
5724 * @param cls closure (always NULL)
5725 * @param client identification of the client
5726 * @param message the actual message
5729 handle_request_connect (void *cls,
5730 struct GNUNET_SERVER_Client *client,
5731 const struct GNUNET_MessageHeader *message)
5733 const struct TransportRequestConnectMessage *trcm =
5734 (const struct TransportRequestConnectMessage *) message;
5736 GNUNET_STATISTICS_update (stats,
5737 gettext_noop ("# REQUEST CONNECT messages received"),
5741 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
5742 "Received a request connect message for peer `%s'\n",
5743 GNUNET_i2s(&trcm->peer));
5745 setup_peer_check_blacklist (&trcm->peer, GNUNET_YES,
5747 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5752 * Handle SET_QUOTA-message.
5754 * @param cls closure (always NULL)
5755 * @param client identification of the client
5756 * @param message the actual message
5759 handle_set_quota (void *cls,
5760 struct GNUNET_SERVER_Client *client,
5761 const struct GNUNET_MessageHeader *message)
5763 const struct QuotaSetMessage *qsm =
5764 (const struct QuotaSetMessage *) message;
5765 struct NeighbourList *n;
5767 GNUNET_STATISTICS_update (stats,
5768 gettext_noop ("# SET QUOTA messages received"),
5771 n = find_neighbour (&qsm->peer);
5774 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5775 GNUNET_STATISTICS_update (stats,
5776 gettext_noop ("# SET QUOTA messages ignored (no such peer)"),
5781 #if DEBUG_TRANSPORT || 1
5782 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5783 "Received `%s' request (new quota %u, old quota %u) from client for peer `%4s'\n",
5785 (unsigned int) ntohl (qsm->quota.value__),
5786 (unsigned int) n->in_tracker.available_bytes_per_s__,
5787 GNUNET_i2s (&qsm->peer));
5789 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker,
5791 if (0 == ntohl (qsm->quota.value__))
5794 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5795 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&n->id),
5798 disconnect_neighbour (n, GNUNET_NO);
5800 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5805 * Take the given address and append it to the set of results sent back to
5808 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
5809 * @param address the resolved name, NULL to indicate the last response
5812 transmit_address_to_client (void *cls, const char *address)
5814 struct GNUNET_SERVER_TransmitContext *tc = cls;
5817 if (NULL == address)
5820 slen = strlen (address) + 1;
5822 GNUNET_SERVER_transmit_context_append_data (tc, address, slen,
5823 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5824 if (NULL == address)
5825 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
5830 * Handle AddressLookup-message.
5832 * @param cls closure (always NULL)
5833 * @param client identification of the client
5834 * @param message the actual message
5837 handle_address_lookup (void *cls,
5838 struct GNUNET_SERVER_Client *client,
5839 const struct GNUNET_MessageHeader *message)
5841 const struct AddressLookupMessage *alum;
5842 struct TransportPlugin *lsPlugin;
5843 const char *nameTransport;
5844 const char *address;
5846 struct GNUNET_SERVER_TransmitContext *tc;
5847 struct GNUNET_TIME_Absolute timeout;
5848 struct GNUNET_TIME_Relative rtimeout;
5851 size = ntohs (message->size);
5852 if (size < sizeof (struct AddressLookupMessage))
5854 GNUNET_break_op (0);
5855 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5858 alum = (const struct AddressLookupMessage *) message;
5859 uint32_t addressLen = ntohl (alum->addrlen);
5860 if (size <= sizeof (struct AddressLookupMessage) + addressLen)
5862 GNUNET_break_op (0);
5863 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5866 address = (const char *) &alum[1];
5867 nameTransport = (const char *) &address[addressLen];
5869 [size - sizeof (struct AddressLookupMessage) - addressLen - 1] != '\0')
5871 GNUNET_break_op (0);
5872 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5875 timeout = GNUNET_TIME_absolute_ntoh (alum->timeout);
5876 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5877 numeric = ntohl (alum->numeric_only);
5878 lsPlugin = find_transport (nameTransport);
5879 if (NULL == lsPlugin)
5881 tc = GNUNET_SERVER_transmit_context_create (client);
5882 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5883 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5884 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
5887 tc = GNUNET_SERVER_transmit_context_create (client);
5888 lsPlugin->api->address_pretty_printer (lsPlugin->api->cls,
5890 address, addressLen,
5893 &transmit_address_to_client, tc);
5898 * Setup the environment for this plugin.
5901 create_environment (struct TransportPlugin *plug)
5903 plug->env.cfg = cfg;
5904 plug->env.my_identity = &my_identity;
5905 plug->env.our_hello = &our_hello;
5906 plug->env.cls = plug;
5907 plug->env.receive = &plugin_env_receive;
5908 plug->env.notify_address = &plugin_env_notify_address;
5909 plug->env.session_end = &plugin_env_session_end;
5910 plug->env.max_connections = max_connect_per_transport;
5911 plug->env.stats = stats;
5916 * Start the specified transport (load the plugin).
5919 start_transport (struct GNUNET_SERVER_Handle *server,
5922 struct TransportPlugin *plug;
5925 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5926 _("Loading `%s' transport plugin\n"), name);
5927 GNUNET_asprintf (&libname, "libgnunet_plugin_transport_%s", name);
5928 plug = GNUNET_malloc (sizeof (struct TransportPlugin));
5929 create_environment (plug);
5930 plug->short_name = GNUNET_strdup (name);
5931 plug->lib_name = libname;
5932 plug->next = plugins;
5934 plug->api = GNUNET_PLUGIN_load (libname, &plug->env);
5935 if (plug->api == NULL)
5937 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5938 _("Failed to load transport plugin for `%s'\n"), name);
5939 GNUNET_free (plug->short_name);
5940 plugins = plug->next;
5941 GNUNET_free (libname);
5948 * Called whenever a client is disconnected. Frees our
5949 * resources associated with that client.
5951 * @param cls closure
5952 * @param client identification of the client
5955 client_disconnect_notification (void *cls,
5956 struct GNUNET_SERVER_Client *client)
5958 struct TransportClient *pos;
5959 struct TransportClient *prev;
5960 struct ClientMessageQueueEntry *mqe;
5961 struct Blacklisters *bl;
5962 struct BlacklistCheck *bc;
5967 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
5968 "Client disconnected, cleaning up.\n");
5970 /* clean up blacklister */
5974 if (bl->client == client)
5979 if (bc->bl_pos == bl)
5981 bc->bl_pos = bl->next;
5984 GNUNET_CONNECTION_notify_transmit_ready_cancel (bc->th);
5987 if (bc->task == GNUNET_SCHEDULER_NO_TASK)
5988 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
5994 GNUNET_CONTAINER_DLL_remove (bl_head,
5997 GNUNET_SERVER_client_drop (bl->client);
6003 /* clean up 'normal' clients */
6006 while ((pos != NULL) && (pos->client != client))
6013 while (NULL != (mqe = pos->message_queue_head))
6015 GNUNET_CONTAINER_DLL_remove (pos->message_queue_head,
6016 pos->message_queue_tail,
6018 pos->message_count--;
6022 clients = pos->next;
6024 prev->next = pos->next;
6025 if (GNUNET_YES == pos->tcs_pending)
6030 if (pos->th != NULL)
6032 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
6035 GNUNET_break (0 == pos->message_count);
6041 * Function called when the service shuts down. Unloads our plugins
6042 * and cancels pending validations.
6044 * @param cls closure, unused
6045 * @param tc task context (unused)
6048 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6050 struct TransportPlugin *plug;
6051 struct OwnAddressList *al;
6052 struct CheckHelloValidatedContext *chvc;
6054 shutdown_in_progress = GNUNET_YES;
6055 while (neighbours != NULL)
6058 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6059 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&neighbours->id),
6062 disconnect_neighbour (neighbours, GNUNET_NO);
6065 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6066 "Transport service is unloading plugins...\n");
6068 while (NULL != (plug = plugins))
6070 plugins = plug->next;
6071 if (plug->address_update_task != GNUNET_SCHEDULER_NO_TASK)
6073 GNUNET_SCHEDULER_cancel (plug->address_update_task);
6074 plug->address_update_task = GNUNET_SCHEDULER_NO_TASK;
6076 GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
6077 GNUNET_free (plug->lib_name);
6078 GNUNET_free (plug->short_name);
6079 while (NULL != (al = plug->addresses))
6081 plug->addresses = al->next;
6086 if (my_private_key != NULL)
6087 GNUNET_CRYPTO_rsa_key_free (my_private_key);
6088 GNUNET_free_non_null (our_hello);
6090 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
6093 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6094 validation_map = NULL;
6098 /* free 'chvc' data structure */
6099 while (NULL != (chvc = chvc_head))
6101 chvc_head = chvc->next;
6102 if (chvc->piter != NULL)
6104 GNUNET_PEERINFO_iterate_cancel (chvc->piter);
6105 GNUNET_STATISTICS_update (stats,
6106 gettext_noop ("# outstanding peerinfo iterate requests"),
6113 GNUNET_assert (chvc->ve_count == 0);
6120 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6123 if (peerinfo != NULL)
6125 GNUNET_PEERINFO_disconnect (peerinfo);
6128 /* Can we assume those are gone by now, or do we need to clean up
6130 GNUNET_break (bl_head == NULL);
6131 GNUNET_break (bc_head == NULL);
6135 static int ats_evaluate_results (int result, int solution, char * problem)
6137 int cont = GNUNET_NO;
6138 #if DEBUG_ATS || VERBOSE_ATS
6139 int error_kind = GNUNET_ERROR_TYPE_DEBUG;
6142 error_kind = GNUNET_ERROR_TYPE_ERROR;
6146 case GNUNET_SYSERR : /* GNUNET problem, not GLPK related */
6147 #if DEBUG_ATS || VERBOSE_ATS
6148 GNUNET_log (error_kind, "%s , GLPK solving not executed\n", problem);
6151 case GLP_ESTOP : /* search terminated by application */
6152 #if DEBUG_ATS || VERBOSE_ATS
6153 GNUNET_log (error_kind, "%s , Search terminated by application\n", problem);
6156 case GLP_EITLIM : /* iteration limit exceeded */
6157 #if DEBUG_ATS || VERBOSE_ATS
6158 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Iteration limit exceeded\n", problem);
6161 case GLP_ETMLIM : /* time limit exceeded */
6162 #if DEBUG_ATS || VERBOSE_ATS
6163 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Time limit exceeded\n", problem);
6166 case GLP_ENOPFS : /* no primal feasible solution */
6167 case GLP_ENODFS : /* no dual feasible solution */
6168 #if DEBUG_ATS || VERBOSE_ATS
6169 GNUNET_log (error_kind, "%s No feasible solution\n", problem);
6173 case GLP_EBADB : /* invalid basis */
6174 case GLP_ESING : /* singular matrix */
6175 case GLP_ECOND : /* ill-conditioned matrix */
6176 case GLP_EBOUND : /* invalid bounds */
6177 case GLP_EFAIL : /* solver failed */
6178 case GLP_EOBJLL : /* objective lower limit reached */
6179 case GLP_EOBJUL : /* objective upper limit reached */
6180 case GLP_EROOT : /* root LP optimum not provided */
6181 #if DEBUG_ATS || VERBOSE_ATS
6182 GNUNET_log (error_kind, "%s Invalid Input data: %i\n", problem, result);
6187 #if DEBUG_ATS || VERBOSE_ATS
6188 GNUNET_log (error_kind, "%s Problem has been solved\n", problem);
6195 #if DEBUG_ATS || VERBOSE_ATS
6196 GNUNET_log (error_kind, "%s solution is undefined\n", problem);
6200 #if DEBUG_ATS || VERBOSE_ATS
6201 GNUNET_log (error_kind, "%s solution is optimal\n", problem);
6206 #if DEBUG_ATS || VERBOSE_ATS
6207 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"));
6212 #if DEBUG_ATS || VERBOSE_ATS
6213 GNUNET_log (error_kind, "%s problem has no %sfeasible solution\n", problem, (0==strcmp(problem,"LP")?"":"integer "));
6217 #if DEBUG_ATS || VERBOSE_ATS
6218 GNUNET_log (error_kind, "%s problem is infeasible \n", problem);
6222 #if DEBUG_ATS || VERBOSE_ATS
6223 GNUNET_log (error_kind, "%s problem is unbounded \n", problem);
6231 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)
6233 int result = GNUNET_SYSERR;
6234 int lp_solution = GNUNET_SYSERR;
6235 int mlp_solution = GNUNET_SYSERR;
6239 glp_init_smcp(&opt_lp);
6241 opt_lp.msg_lev = GLP_MSG_ALL;
6243 opt_lp.msg_lev = GLP_MSG_OFF;
6246 // setting iteration limit
6247 opt_lp.it_lim = max_it;
6249 opt_lp.tm_lim = max_dur;
6251 if (ats->stat.recreate_problem == GNUNET_YES)
6252 opt_lp.presolve = GLP_ON;
6253 result = glp_simplex(ats->prob, &opt_lp);
6254 lp_solution = glp_get_status (ats->prob);
6256 if ((result == GLP_ETMLIM) || (result == GLP_EITLIM))
6258 ats->stat.valid = GNUNET_NO;
6259 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ATS exceeded time or iteration limit!\n");
6263 if (ats_evaluate_results(result, lp_solution, "LP") == GNUNET_YES)
6265 stat->valid = GNUNET_YES;
6269 ats->stat.simplex_rerun_required = GNUNET_YES;
6270 opt_lp.presolve = GLP_ON;
6271 result = glp_simplex(ats->prob, &opt_lp);
6272 lp_solution = glp_get_status (ats->prob);
6274 // TODO: Remove if this does not appear until release
6275 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "EXECUTED SIMPLEX WITH PRESOLVER! %i \n", lp_solution);
6277 if (ats_evaluate_results(result, lp_solution, "LP") != GNUNET_YES)
6279 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "After execution simplex with presolver: STILL INVALID!\n");
6281 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);
6282 glp_write_lp (ats->prob, NULL, filename);
6283 GNUNET_free (filename);
6284 stat->valid = GNUNET_NO;
6285 ats->stat.recreate_problem = GNUNET_YES;
6288 stat->valid = GNUNET_YES;
6293 glp_init_iocp(&opt_mlp);
6295 opt_mlp.tm_lim = max_dur;
6298 opt_mlp.msg_lev = GLP_MSG_ALL;
6300 opt_mlp.msg_lev = GLP_MSG_OFF;
6303 result = glp_intopt (ats->prob, &opt_mlp);
6304 mlp_solution = glp_mip_status (ats->prob);
6305 stat->solution = mlp_solution;
6307 if (ats_evaluate_results(result, mlp_solution, "MLP") == GNUNET_YES)
6309 stat->valid = GNUNET_YES;
6313 // TODO: Remove if this does not appear until release
6314 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);
6315 stat->valid = GNUNET_NO;
6320 int error = GNUNET_NO;
6322 struct ATS_mechanism *t = NULL;
6323 for (c=1; c<= (c_peers); c++ )
6326 t = peers[c].m_head;
6329 bw = glp_get_col_prim(prob, t->col_index);
6333 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);
6335 if (check ==GNUNET_YES)
6337 glp_write_sol(prob, "invalid_solution.mlp");
6338 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid solution, check invalid_solution.mlp");
6339 GNUNET_STATISTICS_update (stats, "ATS invalid solutions", 1, GNUNET_NO);
6342 if (check ==GNUNET_NO)
6350 if (glp_get_col_prim(ats->prob,2*c_mechs+1) != 1)
6353 for (c=1; c<= available_quality_metrics; c++ )
6355 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));
6357 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));
6358 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));
6359 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));
6360 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "objective value: %f\n", glp_mip_obj_val(ats->prob));
6365 static void ats_delete_problem ()
6368 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Deleting problem\n");
6372 for (c=0; c< (ats->stat).c_mechs; c++)
6373 GNUNET_free_non_null (ats->mechanisms[c].rc);
6376 if (ats->mechanisms!=NULL)
6378 GNUNET_free(ats->mechanisms);
6379 ats->mechanisms = NULL;
6382 if (ats->peers!=NULL)
6384 GNUNET_free(ats->peers);
6388 if (ats->prob != NULL)
6390 glp_delete_prob(ats->prob);
6394 ats->stat.begin_cr = GNUNET_SYSERR;
6395 ats->stat.begin_qm = GNUNET_SYSERR;
6396 ats->stat.c_mechs = 0;
6397 ats->stat.c_peers = 0;
6398 ats->stat.end_cr = GNUNET_SYSERR;
6399 ats->stat.end_qm = GNUNET_SYSERR;
6400 ats->stat.solution = GNUNET_SYSERR;
6401 ats->stat.valid = GNUNET_SYSERR;
6405 static void ats_update_problem_qm ()
6410 int c_q_metrics = available_quality_metrics;
6412 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6413 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6415 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6417 row_index = ats->stat.begin_qm;
6419 for (c=1; c <= c_q_metrics; c++)
6424 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6427 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6428 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6430 ja[array_index] = c2;
6432 GNUNET_assert (ats->mechanisms[c2].addr != NULL);
6433 GNUNET_assert (ats->mechanisms[c2].peer != NULL);
6435 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
6437 double v0 = 0, v1 = 0, v2 = 0;
6439 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6440 if (v1 < 1) v0 = 0.1;
6441 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6442 if (v1 < 1) v0 = 0.1;
6443 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6444 if (v1 < 1) v0 = 0.1;
6445 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
6448 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
6450 double v0 = 0, v1 = 0, v2 = 0;
6451 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6453 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6455 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6457 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
6459 value = (double) 10 / value;
6463 ar[array_index] = (ats->mechanisms[c2].peer->f) * value;
6465 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]);
6469 ja[array_index] = ats->stat.col_qm + c - 1;
6470 ar[array_index] = -1;
6473 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6475 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6481 GNUNET_free_non_null (ja);
6482 GNUNET_free_non_null (ar);
6486 static void ats_update_problem_cr ()
6492 double ct_max, ct_min;
6494 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6495 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6497 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6498 row_index = ats->stat.begin_cr;
6501 for (c=0; c<available_ressources; c++)
6503 ct_max = ressources[c].c_max;
6504 ct_min = ressources[c].c_min;
6506 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
6508 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
6510 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6514 GNUNET_assert (ats->mechanisms[c2].addr != NULL);
6515 GNUNET_assert (ats->mechanisms[c2].peer != NULL);
6517 ja[array_index] = c2;
6518 value = ats->mechanisms[c2].addr->ressources[c].c;
6519 ar[array_index] = value;
6521 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6525 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6531 GNUNET_free_non_null (ja);
6532 GNUNET_free_non_null (ar);
6537 static void ats_update_problem_qm_TEST ()
6542 int old_ja[ats->stat.c_mechs + 2];
6543 double old_ar[ats->stat.c_mechs + 2];
6547 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6548 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6550 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics TEST\n");
6552 if (ats->stat.begin_qm >0)
6553 row_index = ats->stat.begin_qm;
6558 for (c=0; c<available_quality_metrics; c++)
6561 c_old = glp_get_mat_row (ats->prob, row_index, old_ja, old_ar);
6563 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6565 for (c2=1; c2<=c_old; c2++)
6567 ja[c2] = old_ja[c2];
6568 if ((changed < 3) && (c2>2) && (old_ar[c2] != -1))
6570 ar[c2] = old_ar[c2] + 5 - changed;
6574 ar[c2] = old_ar[c2];
6576 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]);
6579 glp_set_mat_row (ats->prob, row_index, c_old, ja, ar);
6584 GNUNET_free_non_null (ja);
6585 GNUNET_free_non_null (ar);
6587 #endif //END: HAVE_LIBGLPK
6589 /** solve the bandwidth distribution problem
6590 * @param max_it maximum iterations
6591 * @param max_dur maximum duration in ms
6592 * @param D weight for diversity
6593 * @param U weight for utility
6594 * @param R weight for relativity
6595 * @param v_b_min minimal bandwidth per peer
6596 * @param v_n_min minimum number of connections
6597 * @param stat result struct
6598 * @return GNUNET_SYSERR if glpk is not available, number of mechanisms used
6600 static int ats_create_problem (double D, double U, double R, int v_b_min, int v_n_min, struct ATS_stat *stat)
6602 ats->prob = glp_create_prob();
6608 int c_c_ressources = available_ressources;
6609 int c_q_metrics = available_quality_metrics;
6611 double M = VERY_BIG_DOUBLE_VALUE;
6612 double Q[c_q_metrics+1];
6613 for (c=1; c<=c_q_metrics; c++)
6618 struct NeighbourList *next = neighbours;
6621 int found_addresses = GNUNET_NO;
6622 struct ReadyList *r_next = next->plugins;
6623 while (r_next != NULL)
6625 struct ForeignAddressList * a_next = r_next->addresses;
6626 while (a_next != NULL)
6629 found_addresses = GNUNET_YES;
6630 a_next = a_next->next;
6632 r_next = r_next->next;
6634 if (found_addresses) c_peers++;
6641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No addresses for bw distribution available\n", c_peers);
6643 stat->valid = GNUNET_NO;
6646 return GNUNET_SYSERR;
6649 GNUNET_assert (ats->mechanisms == NULL);
6650 ats->mechanisms = GNUNET_malloc((1+c_mechs) * sizeof (struct ATS_mechanism));
6651 GNUNET_assert (ats->peers == NULL);
6652 ats->peers = GNUNET_malloc((1+c_peers) * sizeof (struct ATS_peer));
6654 struct ATS_mechanism * mechanisms = ats->mechanisms;
6655 struct ATS_peer * peers = ats->peers;
6663 int found_addresses = GNUNET_NO;
6664 struct ReadyList *r_next = next->plugins;
6665 while (r_next != NULL)
6667 struct ForeignAddressList * a_next = r_next->addresses;
6668 while (a_next != NULL)
6670 if (found_addresses == GNUNET_NO)
6672 peers[c_peers].peer = next->id;
6673 peers[c_peers].m_head = NULL;
6674 peers[c_peers].m_tail = NULL;
6675 peers[c_peers].f = 1.0 / c_mechs;
6678 mechanisms[c_mechs].addr = a_next;
6679 mechanisms[c_mechs].col_index = c_mechs;
6680 mechanisms[c_mechs].peer = &peers[c_peers];
6681 mechanisms[c_mechs].next = NULL;
6682 mechanisms[c_mechs].plugin = r_next->plugin;
6684 GNUNET_CONTAINER_DLL_insert_tail(peers[c_peers].m_head, peers[c_peers].m_tail, &mechanisms[c_mechs]);
6685 found_addresses = GNUNET_YES;
6688 a_next = a_next->next;
6690 r_next = r_next->next;
6692 if (found_addresses == GNUNET_YES)
6699 if (v_n_min > c_peers)
6703 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);
6706 int size = 1 + 3 + 10 *c_mechs + c_peers + (c_q_metrics*c_mechs)+ c_q_metrics + c_c_ressources * c_mechs ;
6709 int * ia = GNUNET_malloc (size * sizeof (int));
6710 int * ja = GNUNET_malloc (size * sizeof (int));
6711 double * ar = GNUNET_malloc(size* sizeof (double));
6713 glp_set_prob_name(ats->prob, "gnunet ats bandwidth distribution");
6714 glp_set_obj_dir(ats->prob, GLP_MAX);
6716 /* adding columns */
6718 glp_add_cols(ats->prob, 2 * c_mechs);
6719 /* adding b_t cols */
6720 for (c=1; c <= c_mechs; c++)
6723 GNUNET_asprintf(&name, "p_%s_b%i",GNUNET_i2s(&(mechanisms[c].peer->peer)), c);
6724 glp_set_col_name(ats->prob, c, name);
6726 glp_set_col_bnds(ats->prob, c, GLP_LO, 0.0, 0.0);
6727 glp_set_col_kind(ats->prob, c, GLP_CV);
6728 glp_set_obj_coef(ats->prob, c, 0);
6731 /* adding n_t cols */
6732 for (c=c_mechs+1; c <= 2*c_mechs; c++)
6734 GNUNET_asprintf(&name, "p_%s_n%i",GNUNET_i2s(&(mechanisms[c-c_mechs].peer->peer)),(c-c_mechs));
6735 glp_set_col_name(ats->prob, c, name);
6737 glp_set_col_bnds(ats->prob, c, GLP_DB, 0.0, 1.0);
6738 glp_set_col_kind(ats->prob, c, GLP_IV);
6739 glp_set_obj_coef(ats->prob, c, 0);
6742 /* feasibility constraints */
6743 /* Constraint 1: one address per peer*/
6745 glp_add_rows(ats->prob, c_peers);
6746 for (c=1; c<=c_peers; c++)
6749 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6751 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 1.0, 1.0);
6753 struct ATS_mechanism *m = peers[c].m_head;
6756 ia[array_index] = row_index;
6757 ja[array_index] = (c_mechs + m->col_index);
6758 ar[array_index] = 1;
6760 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6768 /* Constraint 2: only active mechanism gets bandwidth assigned */
6769 glp_add_rows(ats->prob, c_mechs);
6770 for (c=1; c<=c_mechs; c++)
6772 /* b_t - n_t * M <= 0 */
6774 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6776 glp_set_row_bnds(ats->prob, row_index, GLP_UP, 0.0, 0.0);
6778 ia[array_index] = row_index;
6779 ja[array_index] = mechanisms[c].col_index;
6780 ar[array_index] = 1;
6782 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6785 ia[array_index] = row_index;
6786 ja[array_index] = c_mechs + mechanisms[c].col_index;
6787 ar[array_index] = -M;
6789 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6795 /* Constraint 3: minimum bandwidth*/
6796 glp_add_rows(ats->prob, c_mechs);
6797 for (c=1; c<=c_mechs; c++)
6799 /* b_t - n_t * b_min <= 0 */
6801 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6803 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
6805 ia[array_index] = row_index;
6806 ja[array_index] = mechanisms[c].col_index;
6807 ar[array_index] = 1;
6809 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6812 ia[array_index] = row_index;
6813 ja[array_index] = c_mechs + mechanisms[c].col_index;
6814 ar[array_index] = -v_b_min;
6816 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6822 /* Constraint 4: max ressource capacity */
6823 /* V cr: bt * ct_r <= cr_max
6825 glp_add_rows(ats->prob, available_ressources);
6826 double ct_max = VERY_BIG_DOUBLE_VALUE;
6827 double ct_min = 0.0;
6829 stat->begin_cr = array_index;
6831 for (c=0; c<available_ressources; c++)
6833 ct_max = ressources[c].c_max;
6834 ct_min = ressources[c].c_min;
6836 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
6838 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
6840 for (c2=1; c2<=c_mechs; c2++)
6843 ia[array_index] = row_index;
6844 ja[array_index] = c2;
6845 value = mechanisms[c2].addr->ressources[c].c;
6846 ar[array_index] = value;
6848 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6854 stat->end_cr = array_index--;
6856 /* Constraint 5: min number of connections*/
6857 glp_add_rows(ats->prob, 1);
6858 for (c=1; c<=c_mechs; c++)
6860 // b_t - n_t * b_min >= 0
6862 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6864 glp_set_row_bnds(ats->prob, row_index, GLP_LO, v_n_min, 0.0);
6866 ia[array_index] = row_index;
6867 ja[array_index] = c_mechs + mechanisms[c].col_index;
6868 ar[array_index] = 1;
6870 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6876 // optimisation constraints
6880 // Constraint 6: optimize for diversity
6882 col_d = glp_add_cols(ats->prob, 1);
6883 stat->col_d = col_d;
6884 //GNUNET_assert (col_d == (2*c_mechs) + 1);
6885 glp_set_col_name(ats->prob, col_d, "d");
6886 glp_set_obj_coef(ats->prob, col_d, D);
6887 glp_set_col_bnds(ats->prob, col_d, GLP_LO, 0.0, 0.0);
6888 glp_add_rows(ats->prob, 1);
6890 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6892 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6893 for (c=1; c<=c_mechs; c++)
6895 ia[array_index] = row_index;
6896 ja[array_index] = c_mechs + mechanisms[c].col_index;
6897 ar[array_index] = 1;
6899 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6903 ia[array_index] = row_index;
6904 ja[array_index] = col_d;
6905 ar[array_index] = -1;
6907 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6913 // Constraint 7: optimize for quality
6915 col_qm = glp_add_cols(ats->prob, c_q_metrics);
6916 stat->col_qm = col_qm;
6917 //GNUNET_assert (col_qm == (2*c_mechs) + 3 + 1);
6918 for (c=0; c< c_q_metrics; c++)
6920 GNUNET_asprintf(&name, "Q_%s",qm[c].name);
6921 glp_set_col_name(ats->prob, col_qm + c, name);
6922 glp_set_col_bnds(ats->prob, col_qm + c, GLP_LO, 0.0, 0.0);
6924 glp_set_obj_coef(ats->prob, col_qm + c, Q[c]);
6926 glp_add_rows(ats->prob, available_quality_metrics);
6927 stat->begin_qm = row_index;
6928 for (c=1; c <= c_q_metrics; c++)
6931 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6934 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6935 for (c2=1; c2<=c_mechs; c2++)
6938 ia[array_index] = row_index;
6939 ja[array_index] = c2;
6940 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
6942 double v0 = 0, v1 = 0, v2 = 0;
6943 v0 = mechanisms[c2].addr->quality[c-1].values[0];
6944 if (v1 < 1) v0 = 0.1;
6945 v1 = mechanisms[c2].addr->quality[c-1].values[1];
6946 if (v1 < 1) v0 = 0.1;
6947 v2 = mechanisms[c2].addr->quality[c-1].values[2];
6948 if (v1 < 1) v0 = 0.1;
6949 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
6952 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
6954 double v0 = 0, v1 = 0, v2 = 0;
6955 v0 = mechanisms[c2].addr->quality[c-1].values[0];
6957 v1 = mechanisms[c2].addr->quality[c-1].values[1];
6959 v2 = mechanisms[c2].addr->quality[c-1].values[2];
6961 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
6963 value = (double) 10 / value;
6967 ar[array_index] = (mechanisms[c2].peer->f) * value ;
6969 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]);
6974 ia[array_index] = row_index;
6975 ja[array_index] = col_qm + c - 1;
6976 ar[array_index] = -1;
6978 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6983 stat->end_qm = row_index-1;
6985 // Constraint 8: optimize bandwidth utility
6987 col_u = glp_add_cols(ats->prob, 1);
6988 stat->col_u = col_u;
6989 //GNUNET_assert (col_u == (2*c_mechs) + 2);
6990 glp_set_col_name(ats->prob, col_u, "u");
6991 glp_set_obj_coef(ats->prob, col_u, U);
6992 glp_set_col_bnds(ats->prob, col_u, GLP_LO, 0.0, 0.0);
6993 glp_add_rows(ats->prob, 1);
6995 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6997 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6998 for (c=1; c<=c_mechs; c++)
7000 ia[array_index] = row_index;
7001 ja[array_index] = c;
7002 ar[array_index] = mechanisms[c].peer->f;
7004 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7008 ia[array_index] = row_index;
7009 ja[array_index] = col_u;
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]);
7018 // Constraint 9: optimize relativity
7020 col_r = glp_add_cols(ats->prob, 1);
7021 stat->col_r = col_r;
7022 //GNUNET_assert (col_r == (2*c_mechs) + 3);
7023 glp_set_col_name(ats->prob, col_r, "r");
7024 glp_set_obj_coef(ats->prob, col_r, R);
7025 glp_set_col_bnds(ats->prob, col_r, GLP_LO, 0.0, 0.0);
7026 glp_add_rows(ats->prob, c_peers);
7027 for (c=1; c<=c_peers; c++)
7029 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
7031 struct ATS_mechanism *m = peers[c].m_head;
7034 ia[array_index] = row_index;
7035 ja[array_index] = m->col_index;
7036 ar[array_index] = 1 / mechanisms[c].peer->f;
7038 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7043 ia[array_index] = row_index;
7044 ja[array_index] = col_r;
7045 ar[array_index] = -1;
7047 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7054 /* Loading the matrix */
7055 glp_load_matrix(ats->prob, array_index-1, ia, ja, ar);
7057 stat->c_mechs = c_mechs;
7058 stat->c_peers = c_peers;
7060 stat->valid = GNUNET_YES;
7072 void ats_notify_ats_data (
7073 const struct GNUNET_PeerIdentity *peer,
7074 const struct GNUNET_TRANSPORT_ATS_Information *ats_data)
7077 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ATS_notify_ats_data: %s\n",GNUNET_i2s(peer));
7079 if (shutdown_in_progress == GNUNET_NO)
7080 ats_calculate_bandwidth_distribution();
7082 #endif //END: HAVE_LIBGLPK
7085 ats_calculate_bandwidth_distribution ()
7089 struct GNUNET_TIME_Absolute start;
7090 struct GNUNET_TIME_Relative creation;
7091 struct GNUNET_TIME_Relative solving;
7092 char *text = "unmodified";
7094 struct GNUNET_TIME_Relative delta = GNUNET_TIME_absolute_get_difference (ats->last, GNUNET_TIME_absolute_get());
7095 if (delta.rel_value < ats->min_delta.rel_value)
7098 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "Minimum time between cycles not reached\n");
7103 if (shutdown_in_progress == GNUNET_YES)
7106 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "Transport service is shutting down\n");
7112 if (INT_MAX < ats->max_exec_duration.rel_value)
7115 dur = (int) ats->max_exec_duration.rel_value;
7117 ats->stat.simplex_rerun_required = GNUNET_NO;
7118 start = GNUNET_TIME_absolute_get();
7119 if ((ats->stat.recreate_problem == GNUNET_YES) || (ats->prob==NULL) || (ats->stat.valid == GNUNET_NO))
7122 ats->stat.recreate_problem = GNUNET_YES;
7123 ats_delete_problem ();
7124 ats_create_problem (ats->D, ats->U, ats->R, ats->v_b_min, ats->v_n_min, &ats->stat);
7126 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);
7130 else if ((ats->stat.recreate_problem == GNUNET_NO) && (ats->stat.modified_resources == GNUNET_YES) && (ats->stat.valid == GNUNET_YES))
7132 text = "modified resources";
7133 ats_update_problem_cr();
7135 else if ((ats->stat.recreate_problem == GNUNET_NO) && (ats->stat.modified_quality == GNUNET_YES) && (ats->stat.valid == GNUNET_YES))
7137 text = "modified quality";
7138 ats_update_problem_qm();
7139 //ats_update_problem_qm_TEST ();
7143 else GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Problem is unmodified\n");
7146 creation = GNUNET_TIME_absolute_get_difference(start,GNUNET_TIME_absolute_get());
7147 start = GNUNET_TIME_absolute_get();
7149 ats->stat.solution = GLP_UNDEF;
7150 if (ats->stat.valid == GNUNET_YES)
7152 ats_solve_problem(ats->max_iterations, ats->max_exec_duration.rel_value, ats->stat.c_peers, ats->stat.c_mechs, &ats->stat);
7154 solving = GNUNET_TIME_absolute_get_difference(start,GNUNET_TIME_absolute_get());
7156 if (ats->stat.valid == GNUNET_YES)
7158 int msg_type = GNUNET_ERROR_TYPE_DEBUG;
7160 msg_type = GNUNET_ERROR_TYPE_ERROR;
7162 GNUNET_log (msg_type, "MLP %s: creation time: %llu, execution time: %llu, %i mechanisms, simplex rerun: %s, solution %s\n",
7163 text, creation.rel_value, solving.rel_value,
7165 (ats->stat.simplex_rerun_required == GNUNET_NO) ? "NO" : "YES", (ats->stat.solution == 5) ? "OPTIMAL" : "INVALID");
7166 ats->successful_executions ++;
7167 GNUNET_STATISTICS_set (stats, "# ATS successful executions", ats->successful_executions, GNUNET_NO);
7169 if ((ats->stat.recreate_problem == GNUNET_YES) || (ats->prob==NULL))
7170 GNUNET_STATISTICS_set (stats, "ATS state",ATS_NEW, GNUNET_NO);
7171 else if ((ats->stat.modified_resources == GNUNET_YES) &&
7172 (ats->stat.modified_quality == GNUNET_NO))
7173 GNUNET_STATISTICS_set (stats, "ATS state", ATS_C_UPDATED, GNUNET_NO);
7174 else if ((ats->stat.modified_resources == GNUNET_NO) &&
7175 (ats->stat.modified_quality == GNUNET_YES) &&
7176 (ats->stat.simplex_rerun_required == GNUNET_NO))
7177 GNUNET_STATISTICS_set (stats, "ATS state", ATS_Q_UPDATED, GNUNET_NO);
7178 else if ((ats->stat.modified_resources == GNUNET_YES) &&
7179 (ats->stat.modified_quality == GNUNET_YES) &&
7180 (ats->stat.simplex_rerun_required == GNUNET_NO))
7181 GNUNET_STATISTICS_set (stats, "ATS state", ATS_QC_UPDATED, GNUNET_NO);
7182 else if (ats->stat.simplex_rerun_required == GNUNET_NO)
7183 GNUNET_STATISTICS_set (stats, "ATS state", ATS_UNMODIFIED, GNUNET_NO);
7187 if (ats->stat.c_peers != 0)
7189 ats->invalid_executions ++;
7190 GNUNET_STATISTICS_set (stats, "# ATS invalid executions", ats->invalid_executions, GNUNET_NO);
7194 GNUNET_STATISTICS_set (stats, "# ATS successful executions", ats->successful_executions, GNUNET_NO);
7198 GNUNET_STATISTICS_set (stats, "ATS duration", solving.rel_value + creation.rel_value, GNUNET_NO);
7199 GNUNET_STATISTICS_set (stats, "ATS mechanisms", ats->stat.c_mechs, GNUNET_NO);
7200 GNUNET_STATISTICS_set (stats, "ATS peers", ats->stat.c_peers, GNUNET_NO);
7201 GNUNET_STATISTICS_set (stats, "ATS solution", ats->stat.solution, GNUNET_NO);
7202 GNUNET_STATISTICS_set (stats, "ATS timestamp", start.abs_value, GNUNET_NO);
7204 if ((ats->save_mlp == GNUNET_YES) && (ats->stat.c_mechs >= ats->dump_min_peers) && (ats->stat.c_mechs >= ats->dump_min_addr))
7207 if (ats->dump_overwrite == GNUNET_NO)
7209 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i_%s_%llu.mlp",
7210 ats->stat.c_peers, ats->stat.c_mechs, text, GNUNET_TIME_absolute_get().abs_value);
7211 glp_write_lp (ats->prob, NULL, filename);
7215 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i.mlp",
7216 ats->stat.c_peers, ats->stat.c_mechs );
7217 glp_write_lp (ats->prob, NULL, filename);
7219 GNUNET_free (filename);
7221 if ((ats->save_solution == GNUNET_YES) && (ats->stat.c_mechs >= ats->dump_min_peers) && (ats->stat.c_mechs >= ats->dump_min_addr))
7224 if (ats->dump_overwrite == GNUNET_NO)
7226 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i_%s_%llu.sol",
7227 ats->stat.c_peers, ats->stat.c_mechs, text, GNUNET_TIME_absolute_get().abs_value);
7228 glp_print_sol (ats->prob, filename);
7232 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i.sol",
7233 ats->stat.c_peers, ats->stat.c_mechs);
7234 glp_print_sol (ats->prob, filename);
7236 GNUNET_free (filename);
7239 ats->last = GNUNET_TIME_absolute_get();
7240 ats->stat.recreate_problem = GNUNET_NO;
7241 ats->stat.modified_resources = GNUNET_NO;
7242 ats->stat.modified_quality = GNUNET_NO;
7247 ats_schedule_calculation (void *cls,
7248 const struct GNUNET_SCHEDULER_TaskContext *tc)
7250 struct ATS_info *ats = (struct ATS_info *) cls;
7251 if (ats==NULL) return;
7253 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7254 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
7257 if (shutdown_in_progress == GNUNET_YES)
7261 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Running scheduled calculation\n");
7264 ats_calculate_bandwidth_distribution (ats);
7266 ats->ats_task = GNUNET_SCHEDULER_add_delayed (ats->exec_interval,
7267 &ats_schedule_calculation, ats);
7273 unsigned long long value;
7276 ats = GNUNET_malloc(sizeof (struct ATS_info));
7278 ats->min_delta = ATS_MIN_INTERVAL;
7279 ats->exec_interval = ATS_EXEC_INTERVAL;
7280 ats->max_exec_duration = ATS_MAX_EXEC_DURATION;
7281 ats->max_iterations = ATS_MAX_ITERATIONS;
7282 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7285 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "GLPK not installed, ATS not active\n");
7292 ats->v_b_min = 64000;
7294 ats->dump_min_peers = 1;
7295 ats->dump_min_addr = 1;
7296 ats->dump_overwrite = GNUNET_NO;
7297 ats->mechanisms = NULL;
7299 ats->successful_executions = 0;
7300 ats->invalid_executions = 0;
7306 /* loading cost ressources */
7307 for (c=0; c<available_ressources; c++)
7309 GNUNET_asprintf(§ion,"%s_UP",ressources[c].cfg_param);
7310 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
7312 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "transport",section, &value))
7315 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found ressource cost: [%s] = %llu\n", section, value);
7317 ressources[c].c_max = value;
7320 GNUNET_free (section);
7321 GNUNET_asprintf(§ion,"%s_DOWN",ressources[c].cfg_param);
7322 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
7324 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "transport",section, &value))
7327 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found ressource cost: [%s] = %llu\n", section, value);
7329 ressources[c].c_min = value;
7332 GNUNET_free (section);
7335 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MLP"))
7336 ats->save_mlp = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_MLP");
7338 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_SOLUTION"))
7339 ats->save_solution = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_SOLUTION");
7340 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
7341 ats->dump_overwrite = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_OVERWRITE");
7342 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_PEERS"))
7344 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_MIN_PEERS", &value);
7345 ats->dump_min_peers= value;
7347 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_ADDRS"))
7349 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_MIN_ADDRS", &value);
7350 ats->dump_min_addr= value;
7352 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
7354 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_OVERWRITE", &value);
7355 ats->min_delta.rel_value = value;
7358 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
7360 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_MIN_INTERVAL", &value);
7361 ats->min_delta.rel_value = value;
7364 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_EXEC_INTERVAL"))
7366 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_EXEC_INTERVAL", &value);
7367 ats->exec_interval.rel_value = value;
7369 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
7371 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_MIN_INTERVAL", &value);
7372 ats->min_delta.rel_value = value;
7375 ats->ats_task = GNUNET_SCHEDULER_add_now(&ats_schedule_calculation, ats);
7379 static void ats_shutdown ()
7382 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_destroy\n");
7384 if (ats->ats_task != GNUNET_SCHEDULER_NO_TASK)
7385 GNUNET_SCHEDULER_cancel(ats->ats_task);
7386 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7389 ats_delete_problem ();
7396 void ats_notify_peer_connect (
7397 const struct GNUNET_PeerIdentity *peer,
7398 const struct GNUNET_TRANSPORT_ATS_Information *ats_data, int ats_count)
7401 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_connect: %s\n",GNUNET_i2s(peer));
7403 //update_addr_ats();
7404 ats->stat.recreate_problem = GNUNET_YES;
7405 ats_calculate_bandwidth_distribution(ats);
7408 void ats_notify_peer_disconnect (
7409 const struct GNUNET_PeerIdentity *peer)
7412 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_disconnect: %s\n",GNUNET_i2s(peer));
7414 ats->stat.recreate_problem = GNUNET_YES;
7415 ats_calculate_bandwidth_distribution (ats);
7418 struct ForeignAddressList * ats_get_preferred_address (
7419 struct NeighbourList *n)
7422 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ats_get_prefered_transport for peer: %s\n",GNUNET_i2s(&n->id));
7424 struct ReadyList *next = n->plugins;
7425 while (next != NULL)
7428 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "plugin: %s %i\n",next->plugin->short_name,strcmp(next->plugin->short_name,"unix"));
7432 return find_ready_address(n);
7436 * Initiate transport service.
7438 * @param cls closure
7439 * @param server the initialized server
7440 * @param c configuration to use
7444 struct GNUNET_SERVER_Handle *server,
7445 const struct GNUNET_CONFIGURATION_Handle *c)
7447 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
7448 {&handle_start, NULL,
7449 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
7450 {&handle_hello, NULL,
7451 GNUNET_MESSAGE_TYPE_HELLO, 0},
7452 {&handle_send, NULL,
7453 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
7454 {&handle_request_connect, NULL,
7455 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT, sizeof(struct TransportRequestConnectMessage)},
7456 {&handle_set_quota, NULL,
7457 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
7458 {&handle_address_lookup, NULL,
7459 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP,
7461 {&handle_blacklist_init, NULL,
7462 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT, sizeof (struct GNUNET_MessageHeader)},
7463 {&handle_blacklist_reply, NULL,
7464 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY, sizeof (struct BlacklistMessage)},
7470 unsigned long long tneigh;
7473 shutdown_in_progress = GNUNET_NO;
7475 stats = GNUNET_STATISTICS_create ("transport", cfg);
7476 validation_map = GNUNET_CONTAINER_multihashmap_create (64);
7477 /* parse configuration */
7479 GNUNET_CONFIGURATION_get_value_number (c,
7484 GNUNET_CONFIGURATION_get_value_filename (c,
7486 "HOSTKEY", &keyfile)))
7488 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7490 ("Transport service is lacking key configuration settings. Exiting.\n"));
7491 GNUNET_SCHEDULER_shutdown ();
7494 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7497 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7498 validation_map = NULL;
7502 max_connect_per_transport = (uint32_t) tneigh;
7503 peerinfo = GNUNET_PEERINFO_connect (cfg);
7504 if (peerinfo == NULL)
7506 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7507 _("Could not access PEERINFO service. Exiting.\n"));
7508 GNUNET_SCHEDULER_shutdown ();
7511 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7514 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7515 validation_map = NULL;
7516 GNUNET_free (keyfile);
7519 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
7520 GNUNET_free (keyfile);
7521 if (my_private_key == NULL)
7523 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7525 ("Transport service could not access hostkey. Exiting.\n"));
7526 GNUNET_SCHEDULER_shutdown ();
7529 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7532 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7533 validation_map = NULL;
7536 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
7537 GNUNET_CRYPTO_hash (&my_public_key,
7538 sizeof (my_public_key), &my_identity.hashPubKey);
7539 /* setup notification */
7540 GNUNET_SERVER_disconnect_notify (server,
7541 &client_disconnect_notification, NULL);
7542 /* load plugins... */
7545 GNUNET_CONFIGURATION_get_value_string (c,
7546 "TRANSPORT", "PLUGINS", &plugs))
7548 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
7549 _("Starting transport plugins `%s'\n"), plugs);
7550 pos = strtok (plugs, " ");
7553 start_transport (server, pos);
7555 pos = strtok (NULL, " ");
7557 GNUNET_free (plugs);
7559 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
7560 &shutdown_task, NULL);
7567 GNUNET_log (GNUNET_ERROR_TYPE_INFO, _("Transport service ready.\n"));
7569 /* If we have a blacklist file, read from it */
7570 read_blacklist_file(cfg);
7571 /* process client requests */
7572 GNUNET_SERVER_add_handlers (server, handlers);
7577 * The main function for the transport service.
7579 * @param argc number of arguments from the command line
7580 * @param argv command line arguments
7581 * @return 0 ok, 1 on error
7584 main (int argc, char *const *argv)
7586 a2s (NULL, NULL, 0); /* make compiler happy */
7587 return (GNUNET_OK ==
7588 GNUNET_SERVICE_run (argc,
7591 GNUNET_SERVICE_OPTION_NONE,
7592 &run, NULL)) ? 0 : 1;
7595 /* end of gnunet-service-transport.c */