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);
1676 if ((p == NULL) || (addr_len == 0) || (addr == NULL))
1678 return p->api->address_to_string (p->api->cls,
1685 * Mark the given FAL entry as 'connected' (and hence preferred for
1686 * sending); also mark all others for the same peer as 'not connected'
1687 * (since only one can be preferred).
1689 * @param fal address to set to 'connected'
1692 mark_address_connected (struct ForeignAddressList *fal)
1694 struct ForeignAddressList *pos;
1697 GNUNET_assert (GNUNET_YES == fal->validated);
1698 if (fal->connected == GNUNET_YES)
1699 return; /* nothing to do */
1701 pos = fal->ready_list->addresses;
1704 if (GNUNET_YES == pos->connected)
1707 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1708 "Marking address `%s' as no longer connected (due to connect on other address)\n",
1709 a2s (pos->ready_list->plugin->short_name,
1713 GNUNET_break (cnt == GNUNET_YES);
1715 pos->connected = GNUNET_NO;
1716 GNUNET_STATISTICS_update (stats,
1717 gettext_noop ("# connected addresses"),
1723 fal->connected = GNUNET_YES;
1724 if (GNUNET_YES == cnt)
1726 GNUNET_STATISTICS_update (stats,
1727 gettext_noop ("# connected addresses"),
1735 * Send the specified message to the specified client. Since multiple
1736 * messages may be pending for the same client at a time, this code
1737 * makes sure that no message is lost.
1739 * @param client client to transmit the message to
1740 * @param msg the message to send
1741 * @param may_drop can this message be dropped if the
1742 * message queue for this client is getting far too large?
1745 transmit_to_client (struct TransportClient *client,
1746 const struct GNUNET_MessageHeader *msg, int may_drop)
1748 struct ClientMessageQueueEntry *q;
1751 if ((client->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
1753 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1755 ("Dropping message of type %u and size %u, have %u messages pending (%u is the soft limit)\n"),
1758 client->message_count,
1760 GNUNET_STATISTICS_update (stats,
1761 gettext_noop ("# messages dropped due to slow client"),
1766 msize = ntohs (msg->size);
1767 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
1768 q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
1769 memcpy (&q[1], msg, msize);
1770 GNUNET_CONTAINER_DLL_insert_after (client->message_queue_head,
1771 client->message_queue_tail,
1772 client->message_queue_tail,
1774 client->message_count++;
1775 if (client->th == NULL)
1777 client->th = GNUNET_SERVER_notify_transmit_ready (client->client,
1779 GNUNET_TIME_UNIT_FOREVER_REL,
1780 &transmit_to_client_callback,
1782 GNUNET_assert (client->th != NULL);
1788 * Transmit a 'SEND_OK' notification to the given client for the
1791 * @param client who to notify
1792 * @param n neighbour to notify about, can be NULL (on failure)
1793 * @param target target of the transmission
1794 * @param result status code for the transmission request
1797 transmit_send_ok (struct TransportClient *client,
1798 struct NeighbourList *n,
1799 const struct GNUNET_PeerIdentity *target,
1802 struct SendOkMessage send_ok_msg;
1804 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
1805 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
1806 send_ok_msg.success = htonl (result);
1808 send_ok_msg.latency = GNUNET_TIME_relative_hton (n->latency);
1810 send_ok_msg.latency = GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
1811 send_ok_msg.peer = *target;
1812 transmit_to_client (client, &send_ok_msg.header, GNUNET_NO);
1817 * Function called by the GNUNET_TRANSPORT_TransmitFunction
1818 * upon "completion" of a send request. This tells the API
1819 * that it is now legal to send another message to the given
1822 * @param cls closure, identifies the entry on the
1823 * message queue that was transmitted and the
1824 * client responsible for queuing the message
1825 * @param target the peer receiving the message
1826 * @param result GNUNET_OK on success, if the transmission
1827 * failed, we should not tell the client to transmit
1831 transmit_send_continuation (void *cls,
1832 const struct GNUNET_PeerIdentity *target,
1835 struct MessageQueue *mq = cls;
1836 struct NeighbourList *n;
1838 GNUNET_STATISTICS_update (stats,
1839 gettext_noop ("# bytes pending with plugins"),
1840 - (int64_t) mq->message_buf_size,
1842 if (result == GNUNET_OK)
1844 GNUNET_STATISTICS_update (stats,
1845 gettext_noop ("# bytes successfully transmitted by plugins"),
1846 mq->message_buf_size,
1851 GNUNET_STATISTICS_update (stats,
1852 gettext_noop ("# bytes with transmission failure by plugins"),
1853 mq->message_buf_size,
1856 if (mq->specific_address != NULL)
1858 if (result == GNUNET_OK)
1860 mq->specific_address->timeout =
1861 GNUNET_TIME_relative_to_absolute
1862 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
1863 if (mq->specific_address->validated == GNUNET_YES)
1864 mark_address_connected (mq->specific_address);
1868 if (mq->specific_address->connected != GNUNET_NO)
1871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1872 "Marking address `%s' as no longer connected (due to transmission problem)\n",
1873 a2s (mq->specific_address->ready_list->plugin->short_name,
1874 mq->specific_address->addr,
1875 mq->specific_address->addrlen));
1877 GNUNET_STATISTICS_update (stats,
1878 gettext_noop ("# connected addresses"),
1881 mq->specific_address->connected = GNUNET_NO;
1884 if (! mq->internal_msg)
1885 mq->specific_address->in_transmit = GNUNET_NO;
1887 n = find_neighbour(&mq->neighbour_id);
1888 if (mq->client != NULL)
1889 transmit_send_ok (mq->client, n, target, result);
1892 try_transmission_to_peer (n);
1897 * Find an address in any of the available transports for
1898 * the given neighbour that would be good for message
1899 * transmission. This is essentially the transport selection
1902 * @param neighbour for whom to select an address
1903 * @return selected address, NULL if we have none
1905 struct ForeignAddressList *
1906 find_ready_address(struct NeighbourList *neighbour)
1908 struct ReadyList *head = neighbour->plugins;
1909 struct ForeignAddressList *addresses;
1910 struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
1911 struct ForeignAddressList *best_address;
1913 /* Hack to prefer unix domain sockets */
1914 struct ForeignAddressList *unix_address = NULL;
1916 best_address = NULL;
1917 while (head != NULL)
1919 addresses = head->addresses;
1920 while (addresses != NULL)
1922 if ( (addresses->timeout.abs_value < now.abs_value) &&
1923 (addresses->connected == GNUNET_YES) )
1926 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1927 "Marking long-time inactive connection to `%4s' as down.\n",
1928 GNUNET_i2s (&neighbour->id));
1930 GNUNET_STATISTICS_update (stats,
1931 gettext_noop ("# connected addresses"),
1934 addresses->connected = GNUNET_NO;
1936 addresses = addresses->next;
1939 addresses = head->addresses;
1940 while (addresses != NULL)
1942 #if DEBUG_TRANSPORT > 1
1943 if (addresses->addr != NULL)
1944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1945 "Have address `%s' for peer `%4s' (status: %d, %d, %d, %u, %llums, %u)\n",
1946 a2s (head->plugin->short_name,
1948 addresses->addrlen),
1949 GNUNET_i2s (&neighbour->id),
1950 addresses->connected,
1951 addresses->in_transmit,
1952 addresses->validated,
1953 addresses->connect_attempts,
1954 (unsigned long long) addresses->timeout.abs_value,
1955 (unsigned int) addresses->distance);
1957 if (0==strcmp(head->plugin->short_name,"unix"))
1959 if ((unix_address == NULL) || ((unix_address != NULL) &&
1960 (addresses->latency.rel_value < unix_address->latency.rel_value)))
1961 unix_address = addresses;
1963 if ( ( (best_address == NULL) ||
1964 (addresses->connected == GNUNET_YES) ||
1965 (best_address->connected == GNUNET_NO) ) &&
1966 (addresses->in_transmit == GNUNET_NO) &&
1967 ( (best_address == NULL) ||
1968 (addresses->latency.rel_value < best_address->latency.rel_value)) )
1969 best_address = addresses;
1970 /* FIXME: also give lower-latency addresses that are not
1971 connected a chance some times... */
1972 addresses = addresses->next;
1974 if (unix_address != NULL)
1978 if (unix_address != NULL)
1980 best_address = unix_address;
1982 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1983 "Found UNIX address, forced this address\n");
1986 if (best_address != NULL)
1989 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1990 "Best address found (`%s') has latency of %llu ms.\n",
1991 (best_address->addrlen > 0)
1992 ? a2s (best_address->ready_list->plugin->short_name,
1994 best_address->addrlen)
1996 best_address->latency.rel_value);
2001 GNUNET_STATISTICS_update (stats,
2002 gettext_noop ("# transmission attempts failed (no address)"),
2007 return best_address;
2013 * We should re-try transmitting to the given peer,
2014 * hopefully we've learned something in the meantime.
2017 retry_transmission_task (void *cls,
2018 const struct GNUNET_SCHEDULER_TaskContext *tc)
2020 struct NeighbourList *n = cls;
2022 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
2023 try_transmission_to_peer (n);
2028 * Check the ready list for the given neighbour and if a plugin is
2029 * ready for transmission (and if we have a message), do so!
2031 * @param neighbour target peer for which to transmit
2034 try_transmission_to_peer (struct NeighbourList *n)
2036 struct ReadyList *rl;
2037 struct MessageQueue *mq;
2038 struct GNUNET_TIME_Relative timeout;
2042 if (n->messages_head == NULL)
2045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2046 "Transmission queue for `%4s' is empty\n",
2047 GNUNET_i2s (&n->id));
2049 return; /* nothing to do */
2052 mq = n->messages_head;
2053 force_address = GNUNET_YES;
2054 if (mq->specific_address == NULL)
2057 mq->specific_address = ats_get_preferred_address(n);
2058 GNUNET_STATISTICS_update (stats,
2059 gettext_noop ("# transport selected peer address freely"),
2062 force_address = GNUNET_NO;
2064 if (mq->specific_address == NULL)
2066 GNUNET_STATISTICS_update (stats,
2067 gettext_noop ("# transport failed to selected peer address"),
2070 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
2071 if (timeout.rel_value == 0)
2074 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2075 "No destination address available to transmit message of size %u to peer `%4s'\n",
2076 mq->message_buf_size,
2077 GNUNET_i2s (&mq->neighbour_id));
2079 GNUNET_STATISTICS_update (stats,
2080 gettext_noop ("# bytes in message queue for other peers"),
2081 - (int64_t) mq->message_buf_size,
2083 GNUNET_STATISTICS_update (stats,
2084 gettext_noop ("# bytes discarded (no destination address available)"),
2085 mq->message_buf_size,
2087 if (mq->client != NULL)
2088 transmit_send_ok (mq->client, n, &n->id, GNUNET_NO);
2089 GNUNET_CONTAINER_DLL_remove (n->messages_head,
2093 return; /* nobody ready */
2095 GNUNET_STATISTICS_update (stats,
2096 gettext_noop ("# message delivery deferred (no address)"),
2099 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
2100 GNUNET_SCHEDULER_cancel (n->retry_task);
2101 n->retry_task = GNUNET_SCHEDULER_add_delayed (timeout,
2102 &retry_transmission_task,
2105 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2106 "No validated destination address available to transmit message of size %u to peer `%4s', will wait %llums to find an address.\n",
2107 mq->message_buf_size,
2108 GNUNET_i2s (&mq->neighbour_id),
2111 /* FIXME: might want to trigger peerinfo lookup here
2112 (unless that's already pending...) */
2115 GNUNET_CONTAINER_DLL_remove (n->messages_head,
2118 if (mq->specific_address->connected == GNUNET_NO)
2119 mq->specific_address->connect_attempts++;
2120 rl = mq->specific_address->ready_list;
2121 mq->plugin = rl->plugin;
2122 if (!mq->internal_msg)
2123 mq->specific_address->in_transmit = GNUNET_YES;
2125 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2126 "Sending message of size %u for `%4s' to `%s' via plugin `%s'\n",
2127 mq->message_buf_size,
2128 GNUNET_i2s (&n->id),
2129 (mq->specific_address->addr != NULL)
2130 ? a2s (mq->plugin->short_name,
2131 mq->specific_address->addr,
2132 mq->specific_address->addrlen)
2134 rl->plugin->short_name);
2136 GNUNET_STATISTICS_update (stats,
2137 gettext_noop ("# bytes in message queue for other peers"),
2138 - (int64_t) mq->message_buf_size,
2140 GNUNET_STATISTICS_update (stats,
2141 gettext_noop ("# bytes pending with plugins"),
2142 mq->message_buf_size,
2144 ret = rl->plugin->api->send (rl->plugin->api->cls,
2147 mq->message_buf_size,
2149 GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
2150 mq->specific_address->session,
2151 mq->specific_address->addr,
2152 mq->specific_address->addrlen,
2154 &transmit_send_continuation, mq);
2157 /* failure, but 'send' would not call continuation in this case,
2158 so we need to do it here! */
2159 transmit_send_continuation (mq,
2167 * Send the specified message to the specified peer.
2169 * @param client source of the transmission request (can be NULL)
2170 * @param peer_address ForeignAddressList where we should send this message
2171 * @param priority how important is the message
2172 * @param timeout how long do we have to transmit?
2173 * @param message_buf message(s) to send GNUNET_MessageHeader(s)
2174 * @param message_buf_size total size of all messages in message_buf
2175 * @param is_internal is this an internal message; these are pre-pended and
2176 * also do not count for plugins being "ready" to transmit
2177 * @param neighbour handle to the neighbour for transmission
2180 transmit_to_peer (struct TransportClient *client,
2181 struct ForeignAddressList *peer_address,
2182 unsigned int priority,
2183 struct GNUNET_TIME_Relative timeout,
2184 const char *message_buf,
2185 size_t message_buf_size,
2186 int is_internal, struct NeighbourList *neighbour)
2188 struct MessageQueue *mq;
2193 /* check for duplicate submission */
2194 mq = neighbour->messages_head;
2197 if (mq->client == client)
2199 /* client transmitted to same peer twice
2200 before getting SEND_OK! */
2208 GNUNET_STATISTICS_update (stats,
2209 gettext_noop ("# bytes in message queue for other peers"),
2212 mq = GNUNET_malloc (sizeof (struct MessageQueue) + message_buf_size);
2213 mq->specific_address = peer_address;
2214 mq->client = client;
2215 /* FIXME: this memcpy can be up to 7% of our total runtime! */
2216 memcpy (&mq[1], message_buf, message_buf_size);
2217 mq->message_buf = (const char*) &mq[1];
2218 mq->message_buf_size = message_buf_size;
2219 memcpy(&mq->neighbour_id, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
2220 mq->internal_msg = is_internal;
2221 mq->priority = priority;
2222 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
2224 GNUNET_CONTAINER_DLL_insert (neighbour->messages_head,
2225 neighbour->messages_tail,
2228 GNUNET_CONTAINER_DLL_insert_after (neighbour->messages_head,
2229 neighbour->messages_tail,
2230 neighbour->messages_tail,
2232 try_transmission_to_peer (neighbour);
2239 struct GeneratorContext
2241 struct TransportPlugin *plug_pos;
2242 struct OwnAddressList *addr_pos;
2243 struct GNUNET_TIME_Absolute expiration;
2251 address_generator (void *cls, size_t max, void *buf)
2253 struct GeneratorContext *gc = cls;
2256 while ((gc->addr_pos == NULL) && (gc->plug_pos != NULL))
2258 gc->plug_pos = gc->plug_pos->next;
2259 gc->addr_pos = (gc->plug_pos != NULL) ? gc->plug_pos->addresses : NULL;
2261 if (NULL == gc->plug_pos)
2266 ret = GNUNET_HELLO_add_address (gc->plug_pos->short_name,
2269 gc->addr_pos->addrlen, buf, max);
2270 gc->addr_pos = gc->addr_pos->next;
2276 * Construct our HELLO message from all of the addresses of
2277 * all of the transports.
2282 struct GNUNET_HELLO_Message *hello;
2283 struct TransportClient *cpos;
2284 struct NeighbourList *npos;
2285 struct GeneratorContext gc;
2287 gc.plug_pos = plugins;
2288 gc.addr_pos = plugins != NULL ? plugins->addresses : NULL;
2289 gc.expiration = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
2290 hello = GNUNET_HELLO_create (&my_public_key, &address_generator, &gc);
2292 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2293 "Refreshed my `%s', new size is %d\n", "HELLO", GNUNET_HELLO_size(hello));
2295 GNUNET_STATISTICS_update (stats,
2296 gettext_noop ("# refreshed my HELLO"),
2300 while (cpos != NULL)
2302 transmit_to_client (cpos,
2303 (const struct GNUNET_MessageHeader *) hello,
2308 GNUNET_free_non_null (our_hello);
2310 GNUNET_PEERINFO_add_peer (peerinfo, our_hello);
2312 while (npos != NULL)
2315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2316 "Transmitting updated `%s' to neighbour `%4s'\n",
2317 "HELLO", GNUNET_i2s (&npos->id));
2319 GNUNET_STATISTICS_update (stats,
2320 gettext_noop ("# transmitted my HELLO to other peers"),
2323 transmit_to_peer (NULL, NULL, 0,
2324 HELLO_ADDRESS_EXPIRATION,
2325 (const char *) our_hello,
2326 GNUNET_HELLO_size(our_hello),
2334 * Task used to clean up expired addresses for a plugin.
2336 * @param cls closure
2340 expire_address_task (void *cls,
2341 const struct GNUNET_SCHEDULER_TaskContext *tc);
2345 * Update the list of addresses for this plugin,
2346 * expiring those that are past their expiration date.
2348 * @param plugin addresses of which plugin should be recomputed?
2349 * @param fresh set to GNUNET_YES if a new address was added
2350 * and we need to regenerate the HELLO even if nobody
2354 update_addresses (struct TransportPlugin *plugin,
2357 static struct GNUNET_TIME_Absolute last_update;
2358 struct GNUNET_TIME_Relative min_remaining;
2359 struct GNUNET_TIME_Relative remaining;
2360 struct GNUNET_TIME_Absolute now;
2361 struct OwnAddressList *pos;
2362 struct OwnAddressList *prev;
2363 struct OwnAddressList *next;
2366 if (plugin->address_update_task != GNUNET_SCHEDULER_NO_TASK)
2367 GNUNET_SCHEDULER_cancel (plugin->address_update_task);
2368 plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
2369 now = GNUNET_TIME_absolute_get ();
2370 min_remaining = GNUNET_TIME_UNIT_FOREVER_REL;
2371 expired = (GNUNET_TIME_absolute_get_duration (last_update).rel_value > (HELLO_ADDRESS_EXPIRATION.rel_value / 4));
2373 pos = plugin->addresses;
2377 if (pos->expires.abs_value < now.abs_value)
2379 expired = GNUNET_YES;
2381 plugin->addresses = pos->next;
2383 prev->next = pos->next;
2388 remaining = GNUNET_TIME_absolute_get_remaining (pos->expires);
2389 if (remaining.rel_value < min_remaining.rel_value)
2390 min_remaining = remaining;
2396 if (expired || fresh)
2401 min_remaining = GNUNET_TIME_relative_min (min_remaining,
2402 GNUNET_TIME_relative_divide (HELLO_ADDRESS_EXPIRATION,
2404 plugin->address_update_task
2405 = GNUNET_SCHEDULER_add_delayed (min_remaining,
2406 &expire_address_task, plugin);
2411 * Task used to clean up expired addresses for a plugin.
2413 * @param cls closure
2417 expire_address_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2419 struct TransportPlugin *plugin = cls;
2421 plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
2422 if (0 == (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2423 update_addresses (plugin, GNUNET_NO);
2428 * Iterator over hash map entries that NULLs the session of validation
2429 * entries that match the given session.
2431 * @param cls closure (the 'struct Session*' to match against)
2432 * @param key current key code (peer ID, not used)
2433 * @param value value in the hash map ('struct ValidationEntry*')
2434 * @return GNUNET_YES (we should continue to iterate)
2437 remove_session_validations (void *cls,
2438 const GNUNET_HashCode * key,
2441 struct Session *session = cls;
2442 struct ValidationEntry *ve = value;
2444 if (session == ve->session)
2451 * We've been disconnected from the other peer (for some
2452 * connection-oriented transport). Either quickly
2453 * re-establish the connection or signal the disconnect
2456 * Only signal CORE level disconnect if ALL addresses
2457 * for the peer are exhausted.
2459 * @param p overall plugin context
2460 * @param nl neighbour that was disconnected
2463 try_fast_reconnect (struct TransportPlugin *p,
2464 struct NeighbourList *nl)
2466 /* FIXME-MW: fast reconnect / transport switching not implemented... */
2467 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2468 "try_fast_reconnect not implemented!\n");
2469 /* Note: the idea here is to hide problems with transports (or
2470 switching between plugins) from the core to eliminate the need to
2471 re-negotiate session keys and the like; OTOH, we should tell core
2472 quickly (much faster than timeout) `if a connection was lost and
2473 could not be re-established (i.e. other peer went down or is
2474 unable / refuses to communicate);
2476 So we should consider:
2477 1) ideally: our own willingness / need to connect
2478 2) prior failures to connect to this peer (by plugin)
2479 3) ideally: reasons why other peer terminated (as far as knowable)
2481 Most importantly, it must be POSSIBLE for another peer to terminate
2482 a connection for a while (without us instantly re-establishing it).
2483 Similarly, if another peer is gone we should quickly notify CORE.
2484 OTOH, if there was a minor glitch (i.e. crash of gnunet-service-transport
2485 on the other end), we should reconnect in such a way that BOTH CORE
2486 services never even notice.
2487 Furthermore, the same mechanism (or small variation) could be used
2488 to switch to a better-performing plugin (ATS).
2490 Finally, this needs to be tested throughly... */
2493 * GNUNET_NO in the call below makes transport disconnect the peer,
2494 * even if only a single address (out of say, six) went away. This
2495 * function must be careful to ONLY disconnect if the peer is gone,
2496 * not just a specific address.
2498 * More specifically, half the places it was used had it WRONG.
2501 /* No reconnect, signal disconnect instead! */
2503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2504 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&nl->id),
2505 "try_fast_reconnect");
2507 GNUNET_STATISTICS_update (stats,
2508 gettext_noop ("# disconnects due to try_fast_reconnect"),
2512 disconnect_neighbour (nl, GNUNET_YES);
2518 * Function that will be called whenever the plugin internally
2519 * cleans up a session pointer and hence the service needs to
2520 * discard all of those sessions as well. Plugins that do not
2521 * use sessions can simply omit calling this function and always
2522 * use NULL wherever a session pointer is needed.
2524 * @param cls closure
2525 * @param peer which peer was the session for
2526 * @param session which session is being destoyed
2529 plugin_env_session_end (void *cls,
2530 const struct GNUNET_PeerIdentity *peer,
2531 struct Session *session)
2533 struct TransportPlugin *p = cls;
2534 struct NeighbourList *nl;
2535 struct ReadyList *rl;
2536 struct ForeignAddressList *pos;
2537 struct ForeignAddressList *prev;
2540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2541 "Session ended with peer `%4s', %s\n",
2543 "plugin_env_session_end");
2545 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
2546 &remove_session_validations,
2548 nl = find_neighbour (peer);
2552 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2553 "No neighbour record found for peer `%4s'\n",
2556 return; /* was never marked as connected */
2561 if (rl->plugin == p)
2568 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2569 "Plugin was associated with peer `%4s'\n",
2572 GNUNET_STATISTICS_update (stats,
2573 gettext_noop ("# disconnects due to session end"),
2576 disconnect_neighbour (nl, GNUNET_YES);
2580 pos = rl->addresses;
2581 while ( (pos != NULL) &&
2582 (pos->session != session) )
2590 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2591 "Session was never marked as ready for peer `%4s'\n",
2594 //FIXME: This conflicts with inbound tcp connections and tcp nat ... debugging in progress
2595 GNUNET_STATISTICS_update (stats,
2596 gettext_noop ("# disconnects due to unready session"),
2599 disconnect_neighbour (nl, GNUNET_YES);
2600 return; /* was never marked as connected */
2602 pos->session = NULL;
2603 if (pos->addrlen != 0)
2605 if (nl->received_pong != GNUNET_NO)
2607 GNUNET_STATISTICS_update (stats,
2608 gettext_noop ("# try_fast_reconnect thanks to plugin_env_session_end"),
2611 try_fast_reconnect (p, nl);
2615 GNUNET_STATISTICS_update (stats,
2616 gettext_noop ("# disconnects due to missing pong"),
2619 disconnect_neighbour (nl, GNUNET_YES);
2623 /* was inbound connection, free 'pos' */
2625 rl->addresses = pos->next;
2627 prev->next = pos->next;
2628 if (GNUNET_SCHEDULER_NO_TASK != pos->revalidate_task)
2630 GNUNET_SCHEDULER_cancel (pos->revalidate_task);
2631 pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
2633 GNUNET_free_non_null(pos->ressources);
2634 GNUNET_free_non_null(pos->quality);
2636 ats->stat.recreate_problem = GNUNET_YES;
2637 if (nl->received_pong == GNUNET_NO)
2639 GNUNET_STATISTICS_update (stats,
2640 gettext_noop ("# disconnects due to NO pong"),
2643 disconnect_neighbour (nl, GNUNET_YES);
2644 return; /* nothing to do, never connected... */
2646 /* check if we have any validated addresses left */
2647 pos = rl->addresses;
2652 GNUNET_STATISTICS_update (stats,
2653 gettext_noop ("# try_fast_reconnect thanks to validated_address"),
2656 try_fast_reconnect (p, nl);
2661 /* no valid addresses left, signal disconnect! */
2664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2665 "Disconnecting peer `%4s', %s\n",
2667 "plugin_env_session_end");
2669 /* FIXME: This doesn't mean there are no addresses left for this PEER,
2670 * it means there aren't any left for this PLUGIN/PEER combination! So
2671 * calling disconnect_neighbour here with GNUNET_NO forces disconnect
2672 * when it isn't necessary. Using GNUNET_YES at least checks to see
2673 * if there are any addresses that work first, so as not to overdo it.
2676 GNUNET_STATISTICS_update (stats,
2677 gettext_noop ("# disconnects due to plugin_env_session_end"),
2680 disconnect_neighbour (nl, GNUNET_YES);
2685 * Function that must be called by each plugin to notify the
2686 * transport service about the addresses under which the transport
2687 * provided by the plugin can be reached.
2689 * @param cls closure
2690 * @param name name of the transport that generated the address
2691 * @param addr one of the addresses of the host, NULL for the last address
2692 * the specific address format depends on the transport
2693 * @param addrlen length of the address
2694 * @param expires when should this address automatically expire?
2697 plugin_env_notify_address (void *cls,
2701 struct GNUNET_TIME_Relative expires)
2703 struct TransportPlugin *p = cls;
2704 struct OwnAddressList *al;
2705 struct GNUNET_TIME_Absolute abex;
2707 GNUNET_assert (addr != NULL);
2708 abex = GNUNET_TIME_relative_to_absolute (expires);
2709 GNUNET_assert (p == find_transport (name));
2713 if ( (addrlen == al->addrlen) &&
2714 (0 == memcmp (addr, &al[1], addrlen)) )
2717 update_addresses (p, GNUNET_NO);
2722 al = GNUNET_malloc (sizeof (struct OwnAddressList) + addrlen);
2723 al->next = p->addresses;
2726 al->addrlen = addrlen;
2727 memcpy (&al[1], addr, addrlen);
2728 update_addresses (p, GNUNET_YES);
2733 * Notify all of our clients about a peer connecting.
2736 notify_clients_connect (const struct GNUNET_PeerIdentity *peer,
2737 struct GNUNET_TIME_Relative latency,
2740 struct ConnectInfoMessage * cim;
2741 struct TransportClient *cpos;
2745 if (0 == memcmp (peer,
2747 sizeof (struct GNUNET_PeerIdentity)))
2753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2754 "Notifying clients about connection from `%s'\n",
2757 GNUNET_STATISTICS_update (stats,
2758 gettext_noop ("# peers connected"),
2763 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
2764 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
2768 cim = GNUNET_malloc (size);
2769 cim->header.size = htons (size);
2770 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
2771 cim->ats_count = htonl(2);
2772 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
2773 (&(cim->ats))[0].value = htonl (distance);
2774 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
2775 (&(cim->ats))[1].value = htonl ((uint32_t) latency.rel_value);
2776 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
2777 (&(cim->ats))[2].value = htonl (0);
2778 memcpy (&cim->id, peer, sizeof (struct GNUNET_PeerIdentity));
2780 /* notify ats about connecting peer */
2781 if (shutdown_in_progress == GNUNET_NO)
2782 ats_notify_peer_connect (peer, &(cim->ats), 2);
2785 while (cpos != NULL)
2787 transmit_to_client (cpos, &(cim->header), GNUNET_NO);
2796 * Notify all of our clients about a peer disconnecting.
2799 notify_clients_disconnect (const struct GNUNET_PeerIdentity *peer)
2801 struct DisconnectInfoMessage dim;
2802 struct TransportClient *cpos;
2804 if (0 == memcmp (peer,
2806 sizeof (struct GNUNET_PeerIdentity)))
2812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2813 "Notifying clients about lost connection to `%s'\n",
2816 GNUNET_STATISTICS_update (stats,
2817 gettext_noop ("# peers connected"),
2820 dim.header.size = htons (sizeof (struct DisconnectInfoMessage));
2821 dim.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
2822 dim.reserved = htonl (0);
2823 memcpy (&dim.peer, peer, sizeof (struct GNUNET_PeerIdentity));
2825 /* notify ats about connecting peer */
2826 if (shutdown_in_progress == GNUNET_NO)
2827 ats_notify_peer_disconnect (peer);
2830 while (cpos != NULL)
2832 transmit_to_client (cpos, &dim.header, GNUNET_NO);
2839 * Find a ForeignAddressList entry for the given neighbour
2840 * that matches the given address and transport.
2842 * @param neighbour which peer we care about
2843 * @param tname name of the transport plugin
2844 * @param session session to look for, NULL for 'any'; otherwise
2845 * can be used for the service to "learn" this session ID
2847 * @param addr binary address
2848 * @param addrlen length of addr
2849 * @return NULL if no such entry exists
2851 static struct ForeignAddressList *
2852 find_peer_address(struct NeighbourList *neighbour,
2854 struct Session *session,
2858 struct ReadyList *head;
2859 struct ForeignAddressList *pos;
2861 head = neighbour->plugins;
2862 while (head != NULL)
2864 if (0 == strcmp (tname, head->plugin->short_name))
2870 pos = head->addresses;
2871 while ( (pos != NULL) &&
2872 ( (pos->addrlen != addrlen) ||
2873 (memcmp(pos->addr, addr, addrlen) != 0) ) )
2875 if ( (session != NULL) &&
2876 (pos->session == session) )
2880 if ( (session != NULL) && (pos != NULL) )
2881 pos->session = session; /* learn it! */
2887 * Get the peer address struct for the given neighbour and
2888 * address. If it doesn't yet exist, create it.
2890 * @param neighbour which peer we care about
2891 * @param tname name of the transport plugin
2892 * @param session session of the plugin, or NULL for none
2893 * @param addr binary address
2894 * @param addrlen length of addr
2895 * @return NULL if we do not have a transport plugin for 'tname'
2897 static struct ForeignAddressList *
2898 add_peer_address (struct NeighbourList *neighbour,
2900 struct Session *session,
2904 struct ReadyList *head;
2905 struct ForeignAddressList *ret;
2908 ret = find_peer_address (neighbour, tname, session, addr, addrlen);
2911 head = neighbour->plugins;
2913 while (head != NULL)
2915 if (0 == strcmp (tname, head->plugin->short_name))
2921 ret = GNUNET_malloc(sizeof(struct ForeignAddressList) + addrlen);
2922 ret->session = session;
2923 if ((addrlen > 0) && (addr != NULL))
2925 ret->addr = (const char*) &ret[1];
2926 memcpy (&ret[1], addr, addrlen);
2933 ret->ressources = GNUNET_malloc(available_ressources * sizeof (struct ATS_ressource_entry));
2934 for (c=0; c<available_ressources; c++)
2936 struct ATS_ressource_entry *r = ret->ressources;
2938 r[c].atis_index = ressources[c].atis_index;
2939 if (0 == strcmp(neighbour->plugins->plugin->short_name,"unix"))
2941 r[c].c = ressources[c].c_unix;
2943 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"udp"))
2945 r[c].c = ressources[c].c_udp;
2947 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"tcp"))
2949 r[c].c = ressources[c].c_tcp;
2951 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"http"))
2953 r[c].c = ressources[c].c_http;
2955 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"https"))
2957 r[c].c = ressources[c].c_https;
2959 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"wlan"))
2961 r[c].c = ressources[c].c_wlan;
2965 r[c].c = ressources[c].c_default;
2966 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2967 "Assigning default cost to peer `%s' addr plugin `%s'! This should not happen!\n",
2968 GNUNET_i2s(&neighbour->peer),
2969 neighbour->plugins->plugin->short_name);
2973 ret->quality = GNUNET_malloc (available_quality_metrics * sizeof (struct ATS_quality_entry));
2974 ret->addrlen = addrlen;
2975 ret->expires = GNUNET_TIME_relative_to_absolute
2976 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2977 ret->latency = GNUNET_TIME_relative_get_forever();
2979 ret->timeout = GNUNET_TIME_relative_to_absolute
2980 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2981 ret->ready_list = head;
2982 ret->next = head->addresses;
2983 head->addresses = ret;
2989 * Closure for 'add_validated_address'.
2991 struct AddValidatedAddressContext
2994 * Entry that has been validated.
2996 const struct ValidationEntry *ve;
2999 * Flag set after we have added the address so
3000 * that we terminate the iteration next time.
3007 * Callback function used to fill a buffer of max bytes with a list of
3008 * addresses in the format used by HELLOs. Should use
3009 * "GNUNET_HELLO_add_address" as a helper function.
3011 * @param cls the 'struct AddValidatedAddressContext' with the validated address
3012 * @param max maximum number of bytes that can be written to buf
3013 * @param buf where to write the address information
3014 * @return number of bytes written, 0 to signal the
3015 * end of the iteration.
3018 add_validated_address (void *cls,
3019 size_t max, void *buf)
3021 struct AddValidatedAddressContext *avac = cls;
3022 const struct ValidationEntry *ve = avac->ve;
3024 if (GNUNET_YES == avac->done)
3026 avac->done = GNUNET_YES;
3027 return GNUNET_HELLO_add_address (ve->transport_name,
3028 GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION),
3038 * Closure for 'check_address_exists'.
3040 struct CheckAddressExistsClosure
3043 * Address to check for.
3048 * Name of the transport.
3055 struct Session *session;
3058 * Set to GNUNET_YES if the address exists.
3071 * Iterator over hash map entries. Checks if the given
3072 * validation entry is for the same address as what is given
3075 * @param cls the 'struct CheckAddressExistsClosure*'
3076 * @param key current key code (ignored)
3077 * @param value value in the hash map ('struct ValidationEntry')
3078 * @return GNUNET_YES if we should continue to
3079 * iterate (mismatch), GNUNET_NO if not (entry matched)
3082 check_address_exists (void *cls,
3083 const GNUNET_HashCode * key,
3086 struct CheckAddressExistsClosure *caec = cls;
3087 struct ValidationEntry *ve = value;
3089 if ( (0 == strcmp (caec->tname,
3090 ve->transport_name)) &&
3091 (caec->addrlen == ve->addrlen) &&
3092 (0 == memcmp (caec->addr,
3096 caec->exists = GNUNET_YES;
3099 if ( (ve->session != NULL) &&
3100 (caec->session == ve->session) )
3102 caec->exists = GNUNET_YES;
3111 * Iterator to free entries in the validation_map.
3113 * @param cls closure (unused)
3114 * @param key current key code
3115 * @param value value in the hash map (validation to abort)
3116 * @return GNUNET_YES (always)
3119 abort_validation (void *cls,
3120 const GNUNET_HashCode * key,
3123 struct ValidationEntry *va = value;
3125 if (GNUNET_SCHEDULER_NO_TASK != va->timeout_task)
3126 GNUNET_SCHEDULER_cancel (va->timeout_task);
3127 GNUNET_free (va->transport_name);
3128 if (va->chvc != NULL)
3130 va->chvc->ve_count--;
3131 if (va->chvc->ve_count == 0)
3133 GNUNET_CONTAINER_DLL_remove (chvc_head,
3136 GNUNET_free (va->chvc);
3146 * HELLO validation cleanup task (validation failed).
3148 * @param cls the 'struct ValidationEntry' that failed
3149 * @param tc scheduler context (unused)
3152 timeout_hello_validation (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3154 struct ValidationEntry *va = cls;
3155 struct GNUNET_PeerIdentity pid;
3157 va->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3158 GNUNET_STATISTICS_update (stats,
3159 gettext_noop ("# address validation timeouts"),
3162 GNUNET_CRYPTO_hash (&va->publicKey,
3164 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
3166 GNUNET_break (GNUNET_OK ==
3167 GNUNET_CONTAINER_multihashmap_remove (validation_map,
3170 abort_validation (NULL, NULL, va);
3175 neighbour_timeout_task (void *cls,
3176 const struct GNUNET_SCHEDULER_TaskContext *tc)
3178 struct NeighbourList *n = cls;
3181 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
3182 "Neighbour `%4s' has timed out!\n", GNUNET_i2s (&n->id));
3184 GNUNET_STATISTICS_update (stats,
3185 gettext_noop ("# disconnects due to timeout"),
3188 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3189 disconnect_neighbour (n, GNUNET_NO);
3194 * Schedule the job that will cause us to send a PING to the
3195 * foreign address to evaluate its validity and latency.
3197 * @param fal address to PING
3200 schedule_next_ping (struct ForeignAddressList *fal);
3204 * Add the given address to the list of foreign addresses
3205 * available for the given peer (check for duplicates).
3207 * @param cls the respective 'struct NeighbourList' to update
3208 * @param tname name of the transport
3209 * @param expiration expiration time
3210 * @param addr the address
3211 * @param addrlen length of the address
3212 * @return GNUNET_OK (always)
3215 add_to_foreign_address_list (void *cls,
3217 struct GNUNET_TIME_Absolute expiration,
3221 struct NeighbourList *n = cls;
3222 struct ForeignAddressList *fal;
3225 GNUNET_STATISTICS_update (stats,
3226 gettext_noop ("# valid peer addresses returned by PEERINFO"),
3230 fal = find_peer_address (n, tname, NULL, addr, addrlen);
3233 #if DEBUG_TRANSPORT_HELLO
3234 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3235 "Adding address `%s' (%s) for peer `%4s' due to PEERINFO data for %llums.\n",
3236 a2s (tname, addr, addrlen),
3238 GNUNET_i2s (&n->id),
3239 expiration.abs_value);
3241 fal = add_peer_address (n, tname, NULL, addr, addrlen);
3244 GNUNET_STATISTICS_update (stats,
3245 gettext_noop ("# previously validated addresses lacking transport"),
3251 fal->expires = GNUNET_TIME_absolute_max (expiration,
3253 schedule_next_ping (fal);
3259 fal->expires = GNUNET_TIME_absolute_max (expiration,
3265 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3266 "Failed to add new address for `%4s'\n",
3267 GNUNET_i2s (&n->id));
3271 if (fal->validated == GNUNET_NO)
3273 fal->validated = GNUNET_YES;
3274 GNUNET_STATISTICS_update (stats,
3275 gettext_noop ("# peer addresses considered valid"),
3279 if (try == GNUNET_YES)
3282 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3283 "Have new addresses, will try to trigger transmissions.\n");
3285 try_transmission_to_peer (n);
3292 * Add addresses in validated HELLO "h" to the set of addresses
3293 * we have for this peer.
3295 * @param cls closure ('struct NeighbourList*')
3296 * @param peer id of the peer, NULL for last call
3297 * @param h hello message for the peer (can be NULL)
3298 * @param err_msg NULL if successful, otherwise contains error message
3301 add_hello_for_peer (void *cls,
3302 const struct GNUNET_PeerIdentity *peer,
3303 const struct GNUNET_HELLO_Message *h,
3304 const char *err_msg)
3306 struct NeighbourList *n = cls;
3308 if (err_msg != NULL)
3311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3312 _("Error in communication with PEERINFO service: %s\n"),
3319 GNUNET_STATISTICS_update (stats,
3320 gettext_noop ("# outstanding peerinfo iterate requests"),
3327 return; /* no HELLO available */
3329 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3330 "Peerinfo had `%s' message for peer `%4s', adding existing addresses.\n",
3334 if (GNUNET_YES != n->public_key_valid)
3336 GNUNET_HELLO_get_key (h, &n->publicKey);
3337 n->public_key_valid = GNUNET_YES;
3339 GNUNET_HELLO_iterate_addresses (h,
3341 &add_to_foreign_address_list,
3347 * Create a fresh entry in our neighbour list for the given peer.
3348 * Will try to transmit our current HELLO to the new neighbour.
3349 * Do not call this function directly, use 'setup_peer_check_blacklist.
3351 * @param peer the peer for which we create the entry
3352 * @param do_hello should we schedule transmitting a HELLO
3353 * @return the new neighbour list entry
3355 static struct NeighbourList *
3356 setup_new_neighbour (const struct GNUNET_PeerIdentity *peer,
3359 struct NeighbourList *n;
3360 struct TransportPlugin *tp;
3361 struct ReadyList *rl;
3363 GNUNET_assert (0 != memcmp (peer,
3365 sizeof (struct GNUNET_PeerIdentity)));
3367 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3368 "Setting up state for neighbour `%4s'\n",
3371 GNUNET_STATISTICS_update (stats,
3372 gettext_noop ("# active neighbours"),
3375 n = GNUNET_malloc (sizeof (struct NeighbourList));
3376 n->next = neighbours;
3380 GNUNET_TIME_relative_to_absolute
3381 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
3382 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
3383 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
3384 MAX_BANDWIDTH_CARRY_S);
3388 if ((tp->api->send != NULL) && (!is_blacklisted(peer, tp)))
3390 rl = GNUNET_malloc (sizeof (struct ReadyList));
3392 rl->next = n->plugins;
3395 rl->addresses = NULL;
3399 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
3401 n->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
3402 &neighbour_timeout_task, n);
3405 GNUNET_STATISTICS_update (stats,
3406 gettext_noop ("# peerinfo new neighbor iterate requests"),
3409 GNUNET_STATISTICS_update (stats,
3410 gettext_noop ("# outstanding peerinfo iterate requests"),
3413 n->piter = GNUNET_PEERINFO_iterate (peerinfo, peer,
3414 GNUNET_TIME_UNIT_FOREVER_REL,
3415 &add_hello_for_peer, n);
3417 GNUNET_STATISTICS_update (stats,
3418 gettext_noop ("# HELLO's sent to new neighbors"),
3421 if (NULL != our_hello)
3422 transmit_to_peer (NULL, NULL, 0,
3423 HELLO_ADDRESS_EXPIRATION,
3424 (const char *) our_hello, GNUNET_HELLO_size(our_hello),
3432 * Function called after we have checked if communicating
3433 * with a given peer is acceptable.
3435 * @param cls closure
3436 * @param n NULL if communication is not acceptable
3438 typedef void (*SetupContinuation)(void *cls,
3439 struct NeighbourList *n);
3443 * Information kept for each client registered to perform
3449 * This is a linked list.
3451 struct Blacklisters *next;
3454 * This is a linked list.
3456 struct Blacklisters *prev;
3459 * Client responsible for this entry.
3461 struct GNUNET_SERVER_Client *client;
3464 * Blacklist check that we're currently performing.
3466 struct BlacklistCheck *bc;
3472 * Head of DLL of blacklisting clients.
3474 static struct Blacklisters *bl_head;
3477 * Tail of DLL of blacklisting clients.
3479 static struct Blacklisters *bl_tail;
3483 * Context we use when performing a blacklist check.
3485 struct BlacklistCheck
3489 * This is a linked list.
3491 struct BlacklistCheck *next;
3494 * This is a linked list.
3496 struct BlacklistCheck *prev;
3499 * Peer being checked.
3501 struct GNUNET_PeerIdentity peer;
3504 * Option for setup neighbour afterwards.
3509 * Continuation to call with the result.
3511 SetupContinuation cont;
3519 * Current transmission request handle for this client, or NULL if no
3520 * request is pending.
3522 struct GNUNET_CONNECTION_TransmitHandle *th;
3525 * Our current position in the blacklisters list.
3527 struct Blacklisters *bl_pos;
3530 * Current task performing the check.
3532 GNUNET_SCHEDULER_TaskIdentifier task;
3537 * Head of DLL of active blacklisting queries.
3539 static struct BlacklistCheck *bc_head;
3542 * Tail of DLL of active blacklisting queries.
3544 static struct BlacklistCheck *bc_tail;
3548 * Perform next action in the blacklist check.
3550 * @param cls the 'struct BlacklistCheck*'
3554 do_blacklist_check (void *cls,
3555 const struct GNUNET_SCHEDULER_TaskContext *tc);
3558 * Transmit blacklist query to the client.
3560 * @param cls the 'struct BlacklistCheck'
3561 * @param size number of bytes allowed
3562 * @param buf where to copy the message
3563 * @return number of bytes copied to buf
3566 transmit_blacklist_message (void *cls,
3570 struct BlacklistCheck *bc = cls;
3571 struct Blacklisters *bl;
3572 struct BlacklistMessage bm;
3577 GNUNET_assert (bc->task == GNUNET_SCHEDULER_NO_TASK);
3578 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3580 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3581 "Failed to send blacklist test for peer `%s' to client\n",
3582 GNUNET_i2s (&bc->peer));
3586 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3587 "Sending blacklist test for peer `%s' to client\n",
3588 GNUNET_i2s (&bc->peer));
3591 bm.header.size = htons (sizeof (struct BlacklistMessage));
3592 bm.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_QUERY);
3593 bm.is_allowed = htonl (0);
3595 memcpy (buf, &bm, sizeof (bm));
3596 GNUNET_SERVER_receive_done (bl->client, GNUNET_OK);
3602 * Perform next action in the blacklist check.
3604 * @param cls the 'struct BlacklistCheck*'
3608 do_blacklist_check (void *cls,
3609 const struct GNUNET_SCHEDULER_TaskContext *tc)
3611 struct BlacklistCheck *bc = cls;
3612 struct Blacklisters *bl;
3614 bc->task = GNUNET_SCHEDULER_NO_TASK;
3619 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3620 "No blacklist clients active, will now setup neighbour record for peer `%s'\n",
3621 GNUNET_i2s (&bc->peer));
3623 bc->cont (bc->cont_cls,
3624 setup_new_neighbour (&bc->peer, bc->do_hello));
3631 bc->th = GNUNET_SERVER_notify_transmit_ready (bl->client,
3632 sizeof (struct BlacklistMessage),
3633 GNUNET_TIME_UNIT_FOREVER_REL,
3634 &transmit_blacklist_message,
3641 * Obtain a 'struct NeighbourList' for the given peer. If such an entry
3642 * does not yet exist, check the blacklist. If the blacklist says creating
3643 * one is acceptable, create one and call the continuation; otherwise
3644 * call the continuation with NULL.
3646 * @param peer peer to setup or look up a struct NeighbourList for
3647 * @param do_hello should we also schedule sending our HELLO to the peer
3648 * if this is a new record
3649 * @param cont function to call with the 'struct NeigbhbourList*'
3650 * @param cont_cls closure for cont
3653 setup_peer_check_blacklist (const struct GNUNET_PeerIdentity *peer,
3655 SetupContinuation cont,
3658 struct NeighbourList *n;
3659 struct BlacklistCheck *bc;
3661 n = find_neighbour(peer);
3665 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3666 "Neighbour record exists for peer `%s'\n",
3673 if (bl_head == NULL)
3676 cont (cont_cls, setup_new_neighbour (peer, do_hello));
3678 setup_new_neighbour(peer, do_hello);
3681 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3682 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3684 bc->do_hello = do_hello;
3686 bc->cont_cls = cont_cls;
3687 bc->bl_pos = bl_head;
3688 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3694 * Function called with the result of querying a new blacklister about
3695 * it being allowed (or not) to continue to talk to an existing neighbour.
3697 * @param cls the original 'struct NeighbourList'
3698 * @param n NULL if we need to disconnect
3701 confirm_or_drop_neighbour (void *cls,
3702 struct NeighbourList *n)
3704 struct NeighbourList * orig = cls;
3709 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3710 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&orig->id),
3711 "confirm_or_drop_neighboUr");
3713 GNUNET_STATISTICS_update (stats,
3714 gettext_noop ("# disconnects due to blacklist"),
3717 disconnect_neighbour (orig, GNUNET_NO);
3723 * Handle a request to start a blacklist.
3725 * @param cls closure (always NULL)
3726 * @param client identification of the client
3727 * @param message the actual message
3730 handle_blacklist_init (void *cls,
3731 struct GNUNET_SERVER_Client *client,
3732 const struct GNUNET_MessageHeader *message)
3734 struct Blacklisters *bl;
3735 struct BlacklistCheck *bc;
3736 struct NeighbourList *n;
3741 if (bl->client == client)
3744 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3749 bl = GNUNET_malloc (sizeof (struct Blacklisters));
3750 bl->client = client;
3751 GNUNET_SERVER_client_keep (client);
3752 GNUNET_CONTAINER_DLL_insert_after (bl_head, bl_tail, bl_tail, bl);
3753 /* confirm that all existing connections are OK! */
3757 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3758 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3760 bc->do_hello = GNUNET_NO;
3761 bc->cont = &confirm_or_drop_neighbour;
3764 if (n == neighbours) /* all would wait for the same client, no need to
3765 create more than just the first task right now */
3766 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3774 * Handle a request to blacklist a peer.
3776 * @param cls closure (always NULL)
3777 * @param client identification of the client
3778 * @param message the actual message
3781 handle_blacklist_reply (void *cls,
3782 struct GNUNET_SERVER_Client *client,
3783 const struct GNUNET_MessageHeader *message)
3785 const struct BlacklistMessage *msg = (const struct BlacklistMessage*) message;
3786 struct Blacklisters *bl;
3787 struct BlacklistCheck *bc;
3790 while ( (bl != NULL) &&
3791 (bl->client != client) )
3796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3797 "Blacklist client disconnected\n");
3799 /* FIXME: other error handling here!? */
3800 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3805 if (ntohl (msg->is_allowed) == GNUNET_SYSERR)
3808 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3809 "Blacklist check failed, peer not allowed\n");
3811 bc->cont (bc->cont_cls, NULL);
3812 GNUNET_CONTAINER_DLL_remove (bc_head, bc_tail, bc);
3818 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3819 "Blacklist check succeeded, continuing with checks\n");
3821 bc->bl_pos = bc->bl_pos->next;
3822 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3825 /* check if any other bc's are waiting for this blacklister */
3829 if ( (bc->bl_pos == bl) &&
3830 (GNUNET_SCHEDULER_NO_TASK == bc->task) )
3831 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3839 * Send periodic PING messages to a given foreign address.
3841 * @param cls our 'struct PeriodicValidationContext*'
3842 * @param tc task context
3845 send_periodic_ping (void *cls,
3846 const struct GNUNET_SCHEDULER_TaskContext *tc)
3848 struct ForeignAddressList *peer_address = cls;
3849 struct TransportPlugin *tp;
3850 struct ValidationEntry *va;
3851 struct NeighbourList *neighbour;
3852 struct TransportPingMessage ping;
3853 struct CheckAddressExistsClosure caec;
3855 uint16_t hello_size;
3859 peer_address->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
3860 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3862 tp = peer_address->ready_list->plugin;
3863 neighbour = peer_address->ready_list->neighbour;
3864 if (GNUNET_YES != neighbour->public_key_valid)
3866 /* no public key yet, try again later */
3867 schedule_next_ping (peer_address);
3870 caec.addr = peer_address->addr;
3871 caec.addrlen = peer_address->addrlen;
3872 caec.tname = tp->short_name;
3873 caec.session = peer_address->session;
3874 caec.exists = GNUNET_NO;
3875 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
3876 &check_address_exists,
3878 if (caec.exists == GNUNET_YES)
3880 /* During validation attempts we will likely trigger the other
3881 peer trying to validate our address which in turn will cause
3882 it to send us its HELLO, so we expect to hit this case rather
3883 frequently. Only print something if we are very verbose. */
3884 #if DEBUG_TRANSPORT > 1
3885 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3886 "Some validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
3887 (peer_address->addr != NULL)
3888 ? a2s (tp->short_name,
3890 peer_address->addrlen)
3893 GNUNET_i2s (&neighbour->id));
3895 schedule_next_ping (peer_address);
3898 va = GNUNET_malloc (sizeof (struct ValidationEntry) + peer_address->addrlen);
3899 va->transport_name = GNUNET_strdup (tp->short_name);
3900 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
3902 va->send_time = GNUNET_TIME_absolute_get();
3903 va->session = peer_address->session;
3904 if (peer_address->addr != NULL)
3906 va->addr = (const void*) &va[1];
3907 memcpy (&va[1], peer_address->addr, peer_address->addrlen);
3908 va->addrlen = peer_address->addrlen;
3910 memcpy(&va->publicKey,
3911 &neighbour->publicKey,
3912 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
3914 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
3915 &timeout_hello_validation,
3917 GNUNET_CONTAINER_multihashmap_put (validation_map,
3918 &neighbour->id.hashPubKey,
3920 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3922 if (peer_address->validated != GNUNET_YES)
3923 hello_size = GNUNET_HELLO_size(our_hello);
3927 tsize = sizeof(struct TransportPingMessage) + hello_size;
3929 if (peer_address->addr != NULL)
3931 slen = strlen (tp->short_name) + 1;
3932 tsize += slen + peer_address->addrlen;
3936 slen = 0; /* make gcc happy */
3938 message_buf = GNUNET_malloc(tsize);
3939 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
3940 ping.challenge = htonl(va->challenge);
3941 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
3942 if (peer_address->validated != GNUNET_YES)
3944 memcpy(message_buf, our_hello, hello_size);
3947 if (peer_address->addr != NULL)
3949 ping.header.size = htons(sizeof(struct TransportPingMessage) +
3950 peer_address->addrlen +
3952 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
3955 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
3957 peer_address->addrlen);
3961 ping.header.size = htons(sizeof(struct TransportPingMessage));
3964 memcpy(&message_buf[hello_size],
3966 sizeof(struct TransportPingMessage));
3968 #if DEBUG_TRANSPORT_REVALIDATION
3969 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3970 "Performing re-validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s'\n",
3971 (peer_address->addr != NULL)
3972 ? a2s (peer_address->plugin->short_name,
3974 peer_address->addrlen)
3977 GNUNET_i2s (&neighbour->id),
3978 "HELLO", hello_size,
3981 if (peer_address->validated != GNUNET_YES)
3982 GNUNET_STATISTICS_update (stats,
3983 gettext_noop ("# PING with HELLO messages sent"),
3987 GNUNET_STATISTICS_update (stats,
3988 gettext_noop ("# PING without HELLO messages sent"),
3991 GNUNET_STATISTICS_update (stats,
3992 gettext_noop ("# PING messages sent for re-validation"),
3995 transmit_to_peer (NULL, peer_address,
3996 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
3997 HELLO_VERIFICATION_TIMEOUT,
3999 GNUNET_YES, neighbour);
4000 GNUNET_free(message_buf);
4001 schedule_next_ping (peer_address);
4006 * Schedule the job that will cause us to send a PING to the
4007 * foreign address to evaluate its validity and latency.
4009 * @param fal address to PING
4012 schedule_next_ping (struct ForeignAddressList *fal)
4014 struct GNUNET_TIME_Relative delay;
4016 if (fal->revalidate_task != GNUNET_SCHEDULER_NO_TASK)
4018 delay = GNUNET_TIME_absolute_get_remaining (fal->expires);
4019 delay.rel_value /= 2; /* do before expiration */
4020 delay = GNUNET_TIME_relative_min (delay,
4021 LATENCY_EVALUATION_MAX_DELAY);
4022 if (GNUNET_YES != fal->estimated)
4024 delay = GNUNET_TIME_UNIT_ZERO;
4025 fal->estimated = GNUNET_YES;
4027 if (GNUNET_YES == fal->connected)
4029 delay = GNUNET_TIME_relative_min (delay,
4030 CONNECTED_LATENCY_EVALUATION_MAX_DELAY);
4032 /* FIXME: also adjust delay based on how close the last
4033 observed latency is to the latency of the best alternative */
4034 /* bound how fast we can go */
4035 delay = GNUNET_TIME_relative_max (delay,
4036 GNUNET_TIME_UNIT_SECONDS);
4037 /* randomize a bit (to avoid doing all at the same time) */
4038 delay.rel_value += GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1000);
4039 fal->revalidate_task = GNUNET_SCHEDULER_add_delayed(delay,
4040 &send_periodic_ping,
4048 * Function that will be called if we receive some payload
4049 * from another peer.
4051 * @param message the payload
4052 * @param n peer who claimed to be the sender
4055 handle_payload_message (const struct GNUNET_MessageHeader *message,
4056 struct NeighbourList *n)
4058 struct InboundMessage *im;
4059 struct TransportClient *cpos;
4062 msize = ntohs (message->size);
4063 if (n->received_pong == GNUNET_NO)
4066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4067 "Received message of type %u and size %u from `%4s', but no pong yet!\n",
4068 ntohs (message->type),
4069 ntohs (message->size),
4070 GNUNET_i2s (&n->id));
4072 GNUNET_free_non_null (n->pre_connect_message_buffer);
4073 n->pre_connect_message_buffer = GNUNET_malloc (msize);
4074 memcpy (n->pre_connect_message_buffer, message, msize);
4079 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4080 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
4081 ntohs (message->type),
4082 ntohs (message->size),
4083 GNUNET_i2s (&n->id));
4085 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
4088 n->quota_violation_count++;
4090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4091 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
4092 n->in_tracker.available_bytes_per_s__,
4093 n->quota_violation_count);
4095 /* Discount 32k per violation */
4096 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
4101 if (n->quota_violation_count > 0)
4103 /* try to add 32k back */
4104 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
4106 n->quota_violation_count--;
4109 GNUNET_STATISTICS_update (stats,
4110 gettext_noop ("# payload received from other peers"),
4113 /* transmit message to all clients */
4114 uint32_t ats_count = 2;
4115 size_t size = sizeof (struct InboundMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information) + msize;
4116 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
4119 im = GNUNET_malloc (size);
4120 im->header.size = htons (size);
4121 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
4123 im->ats_count = htonl(ats_count);
4124 /* Setting ATS data */
4125 (&(im->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
4126 (&(im->ats))[0].value = htonl (n->distance);
4127 (&(im->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4128 (&(im->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
4129 (&(im->ats))[ats_count].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
4130 (&(im->ats))[ats_count].value = htonl (0);
4132 memcpy (&((&(im->ats))[ats_count+1]), message, msize);
4134 while (cpos != NULL)
4136 transmit_to_client (cpos, &im->header, GNUNET_YES);
4144 * Iterator over hash map entries. Checks if the given validation
4145 * entry is for the same challenge as what is given in the PONG.
4147 * @param cls the 'struct TransportPongMessage*'
4148 * @param key peer identity
4149 * @param value value in the hash map ('struct ValidationEntry')
4150 * @return GNUNET_YES if we should continue to
4151 * iterate (mismatch), GNUNET_NO if not (entry matched)
4154 check_pending_validation (void *cls,
4155 const GNUNET_HashCode * key,
4158 const struct TransportPongMessage *pong = cls;
4159 struct ValidationEntry *ve = value;
4160 struct AddValidatedAddressContext avac;
4161 unsigned int challenge = ntohl(pong->challenge);
4162 struct GNUNET_HELLO_Message *hello;
4163 struct GNUNET_PeerIdentity target;
4164 struct NeighbourList *n;
4165 struct ForeignAddressList *fal;
4166 struct OwnAddressList *oal;
4167 struct TransportPlugin *tp;
4168 struct GNUNET_MessageHeader *prem;
4174 ps = ntohs (pong->header.size);
4175 if (ps < sizeof (struct TransportPongMessage))
4177 GNUNET_break_op (0);
4180 addr = (const char*) &pong[1];
4181 slen = strlen (ve->transport_name) + 1;
4182 if ( (ps - sizeof (struct TransportPongMessage) < slen) ||
4183 (ve->challenge != challenge) ||
4184 (addr[slen-1] != '\0') ||
4185 (0 != strcmp (addr, ve->transport_name)) ||
4186 (ntohl (pong->purpose.size)
4187 != sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
4189 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
4190 sizeof (struct GNUNET_PeerIdentity) + ps - sizeof (struct TransportPongMessage)) )
4195 alen = ps - sizeof (struct TransportPongMessage) - slen;
4196 switch (ntohl (pong->purpose.purpose))
4198 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN:
4199 if ( (ve->addrlen + slen != ntohl (pong->addrlen)) ||
4200 (0 != memcmp (&addr[slen],
4204 return GNUNET_YES; /* different entry, keep trying! */
4206 if (0 != memcmp (&pong->pid,
4208 sizeof (struct GNUNET_PeerIdentity)))
4210 GNUNET_break_op (0);
4214 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN,
4219 GNUNET_break_op (0);
4224 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4225 "Confirmed validity of address, peer `%4s' has address `%s' (%s).\n",
4227 a2s (ve->transport_name,
4228 (const struct sockaddr *) ve->addr,
4230 ve->transport_name);
4233 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING:
4234 if (0 != memcmp (&pong->pid,
4236 sizeof (struct GNUNET_PeerIdentity)))
4239 GNUNET_asprintf(&peer, "%s",GNUNET_i2s (&pong->pid));
4241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4242 "Received PONG for different identity: I am `%s', PONG identity: `%s'\n",
4243 GNUNET_i2s (&my_identity),
4249 if (ve->addrlen != 0)
4251 /* must have been for a different validation entry */
4254 tp = find_transport (ve->transport_name);
4260 oal = tp->addresses;
4263 if ( (oal->addrlen == alen) &&
4264 (0 == memcmp (&oal[1],
4272 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4273 _("Not accepting PONG with address `%s' since I cannot confirm having this address.\n"),
4274 a2s (ve->transport_name,
4280 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING,
4285 GNUNET_break_op (0);
4290 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4291 "Confirmed that peer `%4s' is talking to us using address `%s' (%s) for us.\n",
4293 a2s (ve->transport_name,
4296 ve->transport_name);
4300 GNUNET_break_op (0);
4303 if (GNUNET_TIME_absolute_get_remaining (GNUNET_TIME_absolute_ntoh (pong->expiration)).rel_value == 0)
4305 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4306 _("Received expired signature. Check system time.\n"));
4309 GNUNET_STATISTICS_update (stats,
4310 gettext_noop ("# address validation successes"),
4313 /* create the updated HELLO */
4314 GNUNET_CRYPTO_hash (&ve->publicKey,
4315 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4316 &target.hashPubKey);
4317 if (ve->addr != NULL)
4319 avac.done = GNUNET_NO;
4321 hello = GNUNET_HELLO_create (&ve->publicKey,
4322 &add_validated_address,
4324 GNUNET_PEERINFO_add_peer (peerinfo,
4326 GNUNET_free (hello);
4328 n = find_neighbour (&target);
4331 n->publicKey = ve->publicKey;
4332 n->public_key_valid = GNUNET_YES;
4333 fal = add_peer_address (n,
4338 GNUNET_assert (fal != NULL);
4339 fal->expires = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
4340 fal->validated = GNUNET_YES;
4341 mark_address_connected (fal);
4342 GNUNET_STATISTICS_update (stats,
4343 gettext_noop ("# peer addresses considered valid"),
4346 fal->latency = GNUNET_TIME_absolute_get_duration (ve->send_time);
4347 update_addr_value (fal, GNUNET_TIME_absolute_get_duration (ve->send_time).rel_value, GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4349 schedule_next_ping (fal);
4350 if (n->latency.rel_value == GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
4351 n->latency = fal->latency;
4353 n->latency.rel_value = (fal->latency.rel_value + n->latency.rel_value) / 2;
4355 n->distance = fal->distance;
4356 if (GNUNET_NO == n->received_pong)
4358 n->received_pong = GNUNET_YES;
4360 notify_clients_connect (&target, n->latency, n->distance);
4361 if (NULL != (prem = n->pre_connect_message_buffer))
4363 n->pre_connect_message_buffer = NULL;
4364 handle_payload_message (prem, n);
4368 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4370 GNUNET_SCHEDULER_cancel (n->retry_task);
4371 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4372 try_transmission_to_peer (n);
4376 /* clean up validation entry */
4377 GNUNET_assert (GNUNET_YES ==
4378 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4381 abort_validation (NULL, NULL, ve);
4387 * Function that will be called if we receive a validation
4388 * of an address challenge that we transmitted to another
4389 * peer. Note that the validation should only be considered
4390 * acceptable if the challenge matches AND if the sender
4391 * address is at least a plausible address for this peer
4392 * (otherwise we may be seeing a MiM attack).
4394 * @param cls closure
4395 * @param message the pong message
4396 * @param peer who responded to our challenge
4397 * @param sender_address string describing our sender address (as observed
4398 * by the other peer in binary format)
4399 * @param sender_address_len number of bytes in 'sender_address'
4402 handle_pong (void *cls, const struct GNUNET_MessageHeader *message,
4403 const struct GNUNET_PeerIdentity *peer,
4404 const char *sender_address,
4405 size_t sender_address_len)
4407 if (0 == memcmp (peer,
4409 sizeof (struct GNUNET_PeerIdentity)))
4411 /* PONG send to self, ignore */
4415 #if DEBUG_TRANSPORT > 1
4416 /* we get tons of these that just get discarded, only log
4417 if we are quite verbose */
4418 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4419 "Receiving `%s' message from `%4s'.\n", "PONG",
4422 GNUNET_STATISTICS_update (stats,
4423 gettext_noop ("# PONG messages received"),
4426 if (GNUNET_SYSERR !=
4427 GNUNET_CONTAINER_multihashmap_get_multiple (validation_map,
4429 &check_pending_validation,
4432 /* This is *expected* to happen a lot since we send
4433 PONGs to *all* known addresses of the sender of
4434 the PING, so most likely we get multiple PONGs
4435 per PING, and all but the first PONG will end up
4436 here. So really we should not print anything here
4437 unless we want to be very, very verbose... */
4438 #if DEBUG_TRANSPORT > 2
4439 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4440 "Received `%s' message from `%4s' but have no record of a matching `%s' message. Ignoring.\n",
4452 * Try to validate a neighbour's address by sending him our HELLO and a PING.
4454 * @param cls the 'struct ValidationEntry*'
4455 * @param neighbour neighbour to validate, NULL if validation failed
4458 transmit_hello_and_ping (void *cls,
4459 struct NeighbourList *neighbour)
4461 struct ValidationEntry *va = cls;
4462 struct ForeignAddressList *peer_address;
4463 struct TransportPingMessage ping;
4464 uint16_t hello_size;
4467 struct GNUNET_PeerIdentity id;
4470 GNUNET_CRYPTO_hash (&va->publicKey,
4471 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4473 if (neighbour == NULL)
4475 /* FIXME: stats... */
4476 GNUNET_break (GNUNET_OK ==
4477 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4480 abort_validation (NULL, NULL, va);
4483 neighbour->publicKey = va->publicKey;
4484 neighbour->public_key_valid = GNUNET_YES;
4485 peer_address = add_peer_address (neighbour,
4486 va->transport_name, NULL,
4487 (const void*) &va[1],
4489 if (peer_address == NULL)
4491 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4492 "Failed to add peer `%4s' for plugin `%s'\n",
4493 GNUNET_i2s (&neighbour->id),
4494 va->transport_name);
4495 GNUNET_break (GNUNET_OK ==
4496 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4499 abort_validation (NULL, NULL, va);
4502 hello_size = GNUNET_HELLO_size(our_hello);
4503 slen = strlen(va->transport_name) + 1;
4504 tsize = sizeof(struct TransportPingMessage) + hello_size + va->addrlen + slen;
4505 message_buf = GNUNET_malloc(tsize);
4506 ping.challenge = htonl(va->challenge);
4507 ping.header.size = htons(sizeof(struct TransportPingMessage) + slen + va->addrlen);
4508 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
4509 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
4510 memcpy(message_buf, our_hello, hello_size);
4511 memcpy(&message_buf[hello_size],
4513 sizeof(struct TransportPingMessage));
4514 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
4517 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
4521 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4522 "Performing validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s' (%u bytes)\n",
4525 : a2s (va->transport_name,
4526 (const void*) &va[1], va->addrlen),
4528 GNUNET_i2s (&neighbour->id),
4529 "HELLO", hello_size,
4530 "PING", sizeof (struct TransportPingMessage) + va->addrlen + slen);
4533 GNUNET_STATISTICS_update (stats,
4534 gettext_noop ("# PING messages sent for initial validation"),
4537 transmit_to_peer (NULL, peer_address,
4538 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
4539 HELLO_VERIFICATION_TIMEOUT,
4541 GNUNET_YES, neighbour);
4542 GNUNET_free(message_buf);
4547 * Check if the given address is already being validated; if not,
4548 * append the given address to the list of entries that are being be
4549 * validated and initiate validation.
4551 * @param cls closure ('struct CheckHelloValidatedContext *')
4552 * @param tname name of the transport
4553 * @param expiration expiration time
4554 * @param addr the address
4555 * @param addrlen length of the address
4556 * @return GNUNET_OK (always)
4559 run_validation (void *cls,
4561 struct GNUNET_TIME_Absolute expiration,
4565 struct CheckHelloValidatedContext *chvc = cls;
4566 struct GNUNET_PeerIdentity id;
4567 struct TransportPlugin *tp;
4568 struct ValidationEntry *va;
4569 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4570 struct CheckAddressExistsClosure caec;
4571 struct OwnAddressList *oal;
4573 GNUNET_assert (addr != NULL);
4575 GNUNET_STATISTICS_update (stats,
4576 gettext_noop ("# peer addresses scheduled for validation"),
4579 tp = find_transport (tname);
4582 GNUNET_log (GNUNET_ERROR_TYPE_INFO |
4583 GNUNET_ERROR_TYPE_BULK,
4585 ("Transport `%s' not loaded, will not try to validate peer address using this transport.\n"),
4587 GNUNET_STATISTICS_update (stats,
4588 gettext_noop ("# peer addresses not validated (plugin not available)"),
4593 /* check if this is one of our own addresses */
4594 oal = tp->addresses;
4597 if ( (oal->addrlen == addrlen) &&
4598 (0 == memcmp (&oal[1],
4602 /* not plausible, this address is equivalent to our own address! */
4603 GNUNET_STATISTICS_update (stats,
4604 gettext_noop ("# peer addresses not validated (loopback)"),
4611 GNUNET_HELLO_get_key (chvc->hello, &pk);
4612 GNUNET_CRYPTO_hash (&pk,
4614 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4617 if (is_blacklisted(&id, tp))
4620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4621 "Attempted to validate blacklisted peer `%s' using `%s'!\n",
4629 caec.addrlen = addrlen;
4630 caec.session = NULL;
4632 caec.exists = GNUNET_NO;
4633 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
4634 &check_address_exists,
4636 if (caec.exists == GNUNET_YES)
4638 /* During validation attempts we will likely trigger the other
4639 peer trying to validate our address which in turn will cause
4640 it to send us its HELLO, so we expect to hit this case rather
4641 frequently. Only print something if we are very verbose. */
4642 #if DEBUG_TRANSPORT > 1
4643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4644 "Validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
4645 a2s (tname, addr, addrlen),
4649 GNUNET_STATISTICS_update (stats,
4650 gettext_noop ("# peer addresses not validated (in progress)"),
4655 va = GNUNET_malloc (sizeof (struct ValidationEntry) + addrlen);
4658 va->transport_name = GNUNET_strdup (tname);
4659 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
4661 va->send_time = GNUNET_TIME_absolute_get();
4662 va->addr = (const void*) &va[1];
4663 memcpy (&va[1], addr, addrlen);
4664 va->addrlen = addrlen;
4665 GNUNET_HELLO_get_key (chvc->hello,
4667 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
4668 &timeout_hello_validation,
4670 GNUNET_CONTAINER_multihashmap_put (validation_map,
4673 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4674 setup_peer_check_blacklist (&id, GNUNET_NO,
4675 &transmit_hello_and_ping,
4682 * Check if addresses in validated hello "h" overlap with
4683 * those in "chvc->hello" and validate the rest.
4685 * @param cls closure
4686 * @param peer id of the peer, NULL for last call
4687 * @param h hello message for the peer (can be NULL)
4688 * @param err_msg NULL if successful, otherwise contains error message
4691 check_hello_validated (void *cls,
4692 const struct GNUNET_PeerIdentity *peer,
4693 const struct GNUNET_HELLO_Message *h,
4694 const char *err_msg)
4696 struct CheckHelloValidatedContext *chvc = cls;
4697 struct GNUNET_HELLO_Message *plain_hello;
4698 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4699 struct GNUNET_PeerIdentity target;
4700 struct NeighbourList *n;
4702 if (err_msg != NULL)
4705 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4706 _("Error in communication with PEERINFO service: %s\n"),
4714 GNUNET_STATISTICS_update (stats,
4715 gettext_noop ("# outstanding peerinfo iterate requests"),
4719 if (GNUNET_NO == chvc->hello_known)
4721 /* notify PEERINFO about the peer now, so that we at least
4722 have the public key if some other component needs it */
4723 GNUNET_HELLO_get_key (chvc->hello, &pk);
4724 GNUNET_CRYPTO_hash (&pk,
4725 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4726 &target.hashPubKey);
4727 plain_hello = GNUNET_HELLO_create (&pk,
4730 GNUNET_PEERINFO_add_peer (peerinfo, plain_hello);
4731 GNUNET_free (plain_hello);
4732 #if DEBUG_TRANSPORT_HELLO
4733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4734 "PEERINFO had no `%s' message for peer `%4s', full validation needed.\n",
4736 GNUNET_i2s (&target));
4738 GNUNET_STATISTICS_update (stats,
4739 gettext_noop ("# new HELLOs requiring full validation"),
4742 GNUNET_HELLO_iterate_addresses (chvc->hello,
4749 GNUNET_STATISTICS_update (stats,
4750 gettext_noop ("# duplicate HELLO (peer known)"),
4755 if (chvc->ve_count == 0)
4757 GNUNET_CONTAINER_DLL_remove (chvc_head,
4766 #if DEBUG_TRANSPORT_HELLO
4767 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4768 "PEERINFO had `%s' message for peer `%4s', validating only new addresses.\n",
4772 chvc->hello_known = GNUNET_YES;
4773 n = find_neighbour (peer);
4776 #if DEBUG_TRANSPORT_HELLO
4777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4778 "Calling hello_iterate_addresses for %s!\n",
4781 GNUNET_HELLO_iterate_addresses (h,
4783 &add_to_foreign_address_list,
4785 try_transmission_to_peer (n);
4789 #if DEBUG_TRANSPORT_HELLO
4790 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4791 "No existing neighbor record for %s!\n",
4794 GNUNET_STATISTICS_update (stats,
4795 gettext_noop ("# no existing neighbour record (validating HELLO)"),
4799 GNUNET_STATISTICS_update (stats,
4800 gettext_noop ("# HELLO validations (update case)"),
4803 GNUNET_HELLO_iterate_new_addresses (chvc->hello,
4805 GNUNET_TIME_relative_to_absolute (HELLO_REVALIDATION_START_TIME),
4812 * Process HELLO-message.
4814 * @param plugin transport involved, may be NULL
4815 * @param message the actual message
4816 * @return GNUNET_OK if the HELLO was well-formed, GNUNET_SYSERR otherwise
4819 process_hello (struct TransportPlugin *plugin,
4820 const struct GNUNET_MessageHeader *message)
4823 struct GNUNET_PeerIdentity target;
4824 const struct GNUNET_HELLO_Message *hello;
4825 struct CheckHelloValidatedContext *chvc;
4826 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
4827 #if DEBUG_TRANSPORT_HELLO > 2
4830 hsize = ntohs (message->size);
4831 if ((ntohs (message->type) != GNUNET_MESSAGE_TYPE_HELLO) ||
4832 (hsize < sizeof (struct GNUNET_MessageHeader)))
4835 return GNUNET_SYSERR;
4837 GNUNET_STATISTICS_update (stats,
4838 gettext_noop ("# HELLOs received for validation"),
4842 /* first, check if load is too high */
4843 if (GNUNET_SCHEDULER_get_load (GNUNET_SCHEDULER_PRIORITY_BACKGROUND) > MAX_HELLO_LOAD)
4845 GNUNET_STATISTICS_update (stats,
4846 gettext_noop ("# HELLOs ignored due to high load"),
4849 #if DEBUG_TRANSPORT_HELLO
4850 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4851 "Ignoring `%s' for `%4s', load too high.\n",
4853 GNUNET_i2s (&target));
4857 hello = (const struct GNUNET_HELLO_Message *) message;
4858 if (GNUNET_OK != GNUNET_HELLO_get_key (hello, &publicKey))
4860 #if DEBUG_TRANSPORT_HELLO
4861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4862 "Unable to get public key from `%s' for `%4s'!\n",
4864 GNUNET_i2s (&target));
4866 GNUNET_break_op (0);
4867 return GNUNET_SYSERR;
4870 GNUNET_CRYPTO_hash (&publicKey,
4871 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4872 &target.hashPubKey);
4874 #if DEBUG_TRANSPORT_HELLO
4875 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4876 "Received `%s' message for `%4s'\n",
4878 GNUNET_i2s (&target));
4881 if (0 == memcmp (&my_identity,
4883 sizeof (struct GNUNET_PeerIdentity)))
4885 GNUNET_STATISTICS_update (stats,
4886 gettext_noop ("# HELLOs ignored for validation (is my own HELLO)"),
4892 while (NULL != chvc)
4894 if (GNUNET_HELLO_equals (hello,
4896 GNUNET_TIME_absolute_get ()).abs_value > 0)
4898 #if DEBUG_TRANSPORT_HELLO > 2
4899 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4900 "Received duplicate `%s' message for `%4s'; ignored\n",
4902 GNUNET_i2s (&target));
4904 return GNUNET_OK; /* validation already pending */
4906 if (GNUNET_HELLO_size(hello) == GNUNET_HELLO_size (chvc->hello))
4907 GNUNET_break (0 != memcmp (hello, chvc->hello,
4908 GNUNET_HELLO_size(hello)));
4913 struct NeighbourList *temp_neighbor = find_neighbour(&target);
4914 if ((NULL != temp_neighbor))
4916 fprintf(stderr, "Already know peer, ignoring hello\n");
4921 #if DEBUG_TRANSPORT_HELLO > 2
4924 my_id = GNUNET_strdup(GNUNET_i2s(plugin->env.my_identity));
4926 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4927 "%s: Starting validation of `%s' message for `%4s' via '%s' of size %u\n",
4930 GNUNET_i2s (&target),
4932 GNUNET_HELLO_size(hello));
4937 chvc = GNUNET_malloc (sizeof (struct CheckHelloValidatedContext) + hsize);
4939 chvc->hello = (const struct GNUNET_HELLO_Message *) &chvc[1];
4940 memcpy (&chvc[1], hello, hsize);
4941 GNUNET_CONTAINER_DLL_insert (chvc_head,
4944 /* finally, check if HELLO was previously validated
4945 (continuation will then schedule actual validation) */
4946 GNUNET_STATISTICS_update (stats,
4947 gettext_noop ("# peerinfo process hello iterate requests"),
4950 GNUNET_STATISTICS_update (stats,
4951 gettext_noop ("# outstanding peerinfo iterate requests"),
4954 chvc->piter = GNUNET_PEERINFO_iterate (peerinfo,
4956 HELLO_VERIFICATION_TIMEOUT,
4957 &check_hello_validated, chvc);
4963 * The peer specified by the given neighbour has timed-out or a plugin
4964 * has disconnected. We may either need to do nothing (other plugins
4965 * still up), or trigger a full disconnect and clean up. This
4966 * function updates our state and does the necessary notifications.
4967 * Also notifies our clients that the neighbour is now officially
4970 * @param n the neighbour list entry for the peer
4971 * @param check GNUNET_YES to check if ALL addresses for this peer
4972 * are gone, GNUNET_NO to force a disconnect of the peer
4973 * regardless of whether other addresses exist.
4976 disconnect_neighbour (struct NeighbourList *n, int check)
4978 struct ReadyList *rpos;
4979 struct NeighbourList *npos;
4980 struct NeighbourList *nprev;
4981 struct MessageQueue *mq;
4982 struct ForeignAddressList *peer_addresses;
4983 struct ForeignAddressList *peer_pos;
4985 if (GNUNET_YES == check)
4988 while (NULL != rpos)
4990 peer_addresses = rpos->addresses;
4991 while (peer_addresses != NULL)
4993 // Do not disconnect if: an address is connected or an inbound address exists
4994 if ((GNUNET_YES == peer_addresses->connected) || (peer_addresses->addrlen == 0))
4997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4998 "NOT Disconnecting from `%4s', still have live addresses!\n",
4999 GNUNET_i2s (&n->id));
5001 return; /* still connected */
5003 peer_addresses = peer_addresses->next;
5009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
5010 "Disconnecting from `%4s'\n",
5011 GNUNET_i2s (&n->id));
5013 /* remove n from neighbours list */
5016 while ((npos != NULL) && (npos != n))
5021 GNUNET_assert (npos != NULL);
5023 neighbours = n->next;
5025 nprev->next = n->next;
5027 /* notify all clients about disconnect */
5028 if (GNUNET_YES == n->received_pong)
5029 notify_clients_disconnect (&n->id);
5031 /* clean up all plugins, cancel connections and pending transmissions */
5032 while (NULL != (rpos = n->plugins))
5034 n->plugins = rpos->next;
5035 rpos->plugin->api->disconnect (rpos->plugin->api->cls, &n->id);
5036 while (rpos->addresses != NULL)
5038 peer_pos = rpos->addresses;
5039 rpos->addresses = peer_pos->next;
5040 if (peer_pos->connected == GNUNET_YES)
5041 GNUNET_STATISTICS_update (stats,
5042 gettext_noop ("# connected addresses"),
5045 if (GNUNET_YES == peer_pos->validated)
5046 GNUNET_STATISTICS_update (stats,
5047 gettext_noop ("# peer addresses considered valid"),
5050 if (GNUNET_SCHEDULER_NO_TASK != peer_pos->revalidate_task)
5052 GNUNET_SCHEDULER_cancel (peer_pos->revalidate_task);
5053 peer_pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
5055 GNUNET_free(peer_pos->ressources);
5056 peer_pos->ressources = NULL;
5057 GNUNET_free(peer_pos->quality);
5058 peer_pos->ressources = NULL;
5059 GNUNET_free(peer_pos);
5060 ats->stat.recreate_problem = GNUNET_YES;
5065 /* free all messages on the queue */
5066 while (NULL != (mq = n->messages_head))
5068 GNUNET_STATISTICS_update (stats,
5069 gettext_noop ("# bytes in message queue for other peers"),
5070 - (int64_t) mq->message_buf_size,
5072 GNUNET_STATISTICS_update (stats,
5073 gettext_noop ("# bytes discarded due to disconnect"),
5074 mq->message_buf_size,
5076 GNUNET_CONTAINER_DLL_remove (n->messages_head,
5079 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
5081 sizeof(struct GNUNET_PeerIdentity)));
5084 if (n->timeout_task != GNUNET_SCHEDULER_NO_TASK)
5086 GNUNET_SCHEDULER_cancel (n->timeout_task);
5087 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
5089 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
5091 GNUNET_SCHEDULER_cancel (n->retry_task);
5092 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
5094 if (n->piter != NULL)
5096 GNUNET_PEERINFO_iterate_cancel (n->piter);
5097 GNUNET_STATISTICS_update (stats,
5098 gettext_noop ("# outstanding peerinfo iterate requests"),
5103 /* finally, free n itself */
5104 GNUNET_STATISTICS_update (stats,
5105 gettext_noop ("# active neighbours"),
5108 GNUNET_free_non_null (n->pre_connect_message_buffer);
5114 * We have received a PING message from someone. Need to send a PONG message
5115 * in response to the peer by any means necessary.
5118 handle_ping(void *cls, const struct GNUNET_MessageHeader *message,
5119 const struct GNUNET_PeerIdentity *peer,
5120 struct Session *session,
5121 const char *sender_address,
5122 uint16_t sender_address_len)
5124 struct TransportPlugin *plugin = cls;
5125 struct SessionHeader *session_header = (struct SessionHeader*) session;
5126 struct TransportPingMessage *ping;
5127 struct TransportPongMessage *pong;
5128 struct NeighbourList *n;
5129 struct ReadyList *rl;
5130 struct ForeignAddressList *fal;
5131 struct OwnAddressList *oal;
5136 if (ntohs (message->size) < sizeof (struct TransportPingMessage))
5138 GNUNET_break_op (0);
5139 return GNUNET_SYSERR;
5142 ping = (struct TransportPingMessage *) message;
5143 if (0 != memcmp (&ping->target,
5144 plugin->env.my_identity,
5145 sizeof (struct GNUNET_PeerIdentity)))
5148 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5149 _("Received `%s' message from `%s' destined for `%s' which is not me!\n"),
5151 (sender_address != NULL)
5152 ? a2s (plugin->short_name,
5153 (const struct sockaddr *)sender_address,
5156 GNUNET_i2s (&ping->target));
5158 return GNUNET_SYSERR;
5161 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
5162 "Processing `%s' from `%s'\n",
5164 (sender_address != NULL)
5165 ? a2s (plugin->short_name,
5166 (const struct sockaddr *)sender_address,
5170 GNUNET_STATISTICS_update (stats,
5171 gettext_noop ("# PING messages received"),
5174 addr = (const char*) &ping[1];
5175 alen = ntohs (message->size) - sizeof (struct TransportPingMessage);
5176 slen = strlen (plugin->short_name) + 1;
5179 /* peer wants to confirm that we have an outbound connection to him */
5180 if (session == NULL)
5182 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5183 _("Refusing to create PONG since I do not have a session with `%s'.\n"),
5185 return GNUNET_SYSERR;
5187 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5188 pong->header.size = htons (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5189 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5190 pong->purpose.size =
5191 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5193 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5194 sizeof (struct GNUNET_PeerIdentity) + sender_address_len + slen);
5195 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING);
5196 pong->challenge = ping->challenge;
5197 pong->addrlen = htonl(sender_address_len + slen);
5200 sizeof(struct GNUNET_PeerIdentity));
5204 if ((sender_address!=NULL) && (sender_address_len > 0))
5205 memcpy (&((char*)&pong[1])[slen],
5207 sender_address_len);
5208 if (GNUNET_TIME_absolute_get_remaining (session_header->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4)
5210 /* create / update cached sig */
5212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5213 "Creating PONG signature to indicate active connection.\n");
5215 session_header->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5216 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5217 GNUNET_assert (GNUNET_OK ==
5218 GNUNET_CRYPTO_rsa_sign (my_private_key,
5220 &session_header->pong_signature));
5224 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5226 memcpy (&pong->signature,
5227 &session_header->pong_signature,
5228 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5234 /* peer wants to confirm that this is one of our addresses */
5238 plugin->api->check_address (plugin->api->cls,
5242 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5243 _("Not confirming PING with address `%s' since I cannot confirm having this address.\n"),
5244 a2s (plugin->short_name,
5249 oal = plugin->addresses;
5252 if ( (oal->addrlen == alen) &&
5259 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + alen + slen);
5260 pong->header.size = htons (sizeof (struct TransportPongMessage) + alen + slen);
5261 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5262 pong->purpose.size =
5263 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5265 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5266 sizeof (struct GNUNET_PeerIdentity) + alen + slen);
5267 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN);
5268 pong->challenge = ping->challenge;
5269 pong->addrlen = htonl(alen + slen);
5272 sizeof(struct GNUNET_PeerIdentity));
5273 memcpy (&pong[1], plugin->short_name, slen);
5274 memcpy (&((char*)&pong[1])[slen], addr, alen);
5275 if ( (oal != NULL) &&
5276 (GNUNET_TIME_absolute_get_remaining (oal->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4) )
5278 /* create / update cached sig */
5280 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5281 "Creating PONG signature to indicate ownership.\n");
5283 oal->pong_sig_expires = GNUNET_TIME_absolute_min (oal->expires,
5284 GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5285 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5286 GNUNET_assert (GNUNET_OK ==
5287 GNUNET_CRYPTO_rsa_sign (my_private_key,
5289 &oal->pong_signature));
5290 memcpy (&pong->signature,
5291 &oal->pong_signature,
5292 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5294 else if (oal == NULL)
5296 /* not using cache (typically DV-only) */
5297 pong->expiration = GNUNET_TIME_absolute_hton (GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5298 GNUNET_assert (GNUNET_OK ==
5299 GNUNET_CRYPTO_rsa_sign (my_private_key,
5305 /* can used cached version */
5306 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5307 memcpy (&pong->signature,
5308 &oal->pong_signature,
5309 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5312 n = find_neighbour(peer);
5313 GNUNET_assert (n != NULL);
5314 /* first try reliable response transmission */
5318 fal = rl->addresses;
5321 if (-1 != rl->plugin->api->send (rl->plugin->api->cls,
5324 ntohs (pong->header.size),
5325 TRANSPORT_PONG_PRIORITY,
5326 HELLO_VERIFICATION_TIMEOUT,
5334 GNUNET_STATISTICS_update (stats,
5335 gettext_noop ("# PONGs unicast via reliable transport"),
5345 /* no reliable method found, do multicast */
5346 GNUNET_STATISTICS_update (stats,
5347 gettext_noop ("# PONGs multicast to all available addresses"),
5353 fal = rl->addresses;
5356 transmit_to_peer(NULL, fal,
5357 TRANSPORT_PONG_PRIORITY,
5358 HELLO_VERIFICATION_TIMEOUT,
5360 ntohs(pong->header.size),
5373 * Function called by the plugin for each received message. Update
5374 * data volumes, possibly notify plugins about reducing the rate at
5375 * which they read from the socket and generally forward to our
5378 * @param cls the "struct TransportPlugin *" we gave to the plugin
5379 * @param peer (claimed) identity of the other peer
5380 * @param message the message, NULL if we only care about
5381 * learning about the delay until we should receive again
5382 * @param ats_data information for automatic transport selection
5383 * @param ats_count number of elements in ats not including 0-terminator
5384 * @param session identifier used for this session (can be NULL)
5385 * @param sender_address binary address of the sender (if observed)
5386 * @param sender_address_len number of bytes in sender_address
5387 * @return how long in ms the plugin should wait until receiving more data
5388 * (plugins that do not support this, can ignore the return value)
5390 static struct GNUNET_TIME_Relative
5391 plugin_env_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
5392 const struct GNUNET_MessageHeader *message,
5393 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
5395 struct Session *session,
5396 const char *sender_address,
5397 uint16_t sender_address_len)
5399 struct TransportPlugin *plugin = cls;
5400 struct ReadyList *service_context;
5401 struct ForeignAddressList *peer_address;
5403 struct NeighbourList *n;
5404 struct GNUNET_TIME_Relative ret;
5408 if (0 == memcmp (peer,
5410 sizeof (struct GNUNET_PeerIdentity)))
5412 /* refuse to receive from myself */
5414 return GNUNET_TIME_UNIT_FOREVER_REL;
5416 if (is_blacklisted (peer, plugin))
5417 return GNUNET_TIME_UNIT_FOREVER_REL;
5418 n = find_neighbour (peer);
5420 n = setup_new_neighbour (peer, GNUNET_YES);
5421 service_context = n->plugins;
5422 while ((service_context != NULL) && (plugin != service_context->plugin))
5423 service_context = service_context->next;
5424 GNUNET_assert ((plugin->api->send == NULL) || (service_context != NULL));
5425 peer_address = NULL;
5428 for (c=0; c<ats_count; c++)
5429 if (ntohl(ats_data[c].type) == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
5430 distance = ntohl(ats_data[c].value);
5432 /* notify ATS about incoming data */
5433 //ats_notify_ats_data(peer, ats_data);
5435 if (message != NULL)
5437 if ( (session != NULL) ||
5438 (sender_address != NULL) )
5439 peer_address = add_peer_address (n,
5443 sender_address_len);
5444 if (peer_address != NULL)
5446 update_addr_ats(peer_address, ats_data, ats_count);
5447 update_addr_value(peer_address, distance, GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5449 peer_address->distance = distance;
5450 if (GNUNET_YES == peer_address->validated)
5451 mark_address_connected (peer_address);
5452 peer_address->timeout
5453 = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5454 schedule_next_ping (peer_address);
5456 /* update traffic received amount ... */
5457 msize = ntohs (message->size);
5459 GNUNET_STATISTICS_update (stats,
5460 gettext_noop ("# bytes received from other peers"),
5463 n->distance = distance;
5465 GNUNET_TIME_relative_to_absolute
5466 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5467 GNUNET_SCHEDULER_cancel (n->timeout_task);
5469 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
5470 &neighbour_timeout_task, n);
5471 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
5473 /* dropping message due to frequent inbound volume violations! */
5474 GNUNET_log (GNUNET_ERROR_TYPE_WARNING |
5475 GNUNET_ERROR_TYPE_BULK,
5477 ("Dropping incoming message due to repeated bandwidth quota (%u b/s) violations (total of %u).\n"),
5478 n->in_tracker.available_bytes_per_s__,
5479 n->quota_violation_count);
5480 GNUNET_STATISTICS_update (stats,
5481 gettext_noop ("# bandwidth quota violations by other peers"),
5484 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
5486 if ((ntohs(message->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_ATS) &&
5487 (ntohs(message->size) == (sizeof (struct GNUNET_MessageHeader) + sizeof (uint32_t))))
5489 uint32_t value = ntohl(*((uint32_t *) &message[1]));
5490 //GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "GNUNET_MESSAGE_TYPE_TRANSPORT_ATS: %i \n", value);
5491 /* Force ressource and quality update */
5494 ats->stat.modified_resources = GNUNET_YES;
5495 ats->stat.modified_quality = GNUNET_YES;
5497 /* Force cost update */
5499 ats->stat.modified_resources = GNUNET_YES;
5500 /* Force quality update */
5502 ats->stat.modified_quality = GNUNET_YES;
5503 /* Force full rebuild */
5505 ats->stat.recreate_problem = GNUNET_YES;
5509 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5510 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
5511 ntohs (message->type),
5512 ntohs (message->size),
5515 switch (ntohs (message->type))
5517 case GNUNET_MESSAGE_TYPE_HELLO:
5518 GNUNET_STATISTICS_update (stats,
5519 gettext_noop ("# HELLO messages received from other peers"),
5522 process_hello (plugin, message);
5524 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
5525 handle_ping (plugin, message, peer, session, sender_address, sender_address_len);
5527 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
5528 handle_pong (plugin, message, peer, sender_address, sender_address_len);
5530 case GNUNET_MESSAGE_TYPE_TRANSPORT_ATS:
5533 handle_payload_message (message, n);
5537 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 0);
5538 if (ret.rel_value > 0)
5541 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5542 "Throttling read (%llu bytes excess at %u b/s), waiting %llu ms before reading more.\n",
5543 (unsigned long long) n->in_tracker.consumption_since_last_update__,
5544 (unsigned int) n->in_tracker.available_bytes_per_s__,
5545 (unsigned long long) ret.rel_value);
5547 GNUNET_STATISTICS_update (stats,
5548 gettext_noop ("# ms throttling suggested"),
5549 (int64_t) ret.rel_value,
5556 * Handle START-message. This is the first message sent to us
5557 * by any client which causes us to add it to our list.
5559 * @param cls closure (always NULL)
5560 * @param client identification of the client
5561 * @param message the actual message
5564 handle_start (void *cls,
5565 struct GNUNET_SERVER_Client *client,
5566 const struct GNUNET_MessageHeader *message)
5568 const struct StartMessage *start;
5569 struct TransportClient *c;
5570 struct ConnectInfoMessage * cim;
5571 struct NeighbourList *n;
5575 start = (const struct StartMessage*) message;
5577 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5578 "Received `%s' request from client\n", "START");
5583 if (c->client == client)
5585 /* client already on our list! */
5587 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5592 if ( (GNUNET_NO != ntohl (start->do_check)) &&
5593 (0 != memcmp (&start->self,
5595 sizeof (struct GNUNET_PeerIdentity))) )
5597 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5598 _("Rejecting control connection from peer `%s', which is not me!\n"),
5599 GNUNET_i2s (&start->self));
5600 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5603 c = GNUNET_malloc (sizeof (struct TransportClient));
5607 if (our_hello != NULL)
5610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5611 "Sending our own `%s' to new client\n", "HELLO");
5613 transmit_to_client (c,
5614 (const struct GNUNET_MessageHeader *) our_hello,
5616 /* tell new client about all existing connections */
5618 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
5619 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
5623 cim = GNUNET_malloc (size);
5624 cim->header.size = htons (size);
5625 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
5626 cim->ats_count = htonl(ats_count);
5627 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
5628 (&(cim->ats))[2].value = htonl (0);
5632 if (GNUNET_YES == n->received_pong)
5634 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5635 (&(cim->ats))[0].value = htonl (n->distance);
5636 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
5637 (&(cim->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
5639 transmit_to_client (c, &cim->header, GNUNET_NO);
5645 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5650 * Handle HELLO-message.
5652 * @param cls closure (always NULL)
5653 * @param client identification of the client
5654 * @param message the actual message
5657 handle_hello (void *cls,
5658 struct GNUNET_SERVER_Client *client,
5659 const struct GNUNET_MessageHeader *message)
5663 GNUNET_STATISTICS_update (stats,
5664 gettext_noop ("# HELLOs received from clients"),
5667 ret = process_hello (NULL, message);
5668 GNUNET_SERVER_receive_done (client, ret);
5673 * Closure for 'transmit_client_message'; followed by
5674 * 'msize' bytes of the actual message.
5676 struct TransmitClientMessageContext
5679 * Client on whom's behalf we are sending.
5681 struct GNUNET_SERVER_Client *client;
5684 * Timeout for the transmission.
5686 struct GNUNET_TIME_Absolute timeout;
5694 * Size of the message in bytes.
5701 * Schedule transmission of a message we got from a client to a peer.
5703 * @param cls the 'struct TransmitClientMessageContext*'
5704 * @param n destination, or NULL on error (in that case, drop the message)
5707 transmit_client_message (void *cls,
5708 struct NeighbourList *n)
5710 struct TransmitClientMessageContext *tcmc = cls;
5711 struct TransportClient *tc;
5714 while ((tc != NULL) && (tc->client != tcmc->client))
5719 transmit_to_peer (tc, NULL, tcmc->priority,
5720 GNUNET_TIME_absolute_get_remaining (tcmc->timeout),
5722 tcmc->msize, GNUNET_NO, n);
5724 GNUNET_SERVER_receive_done (tcmc->client, GNUNET_OK);
5725 GNUNET_SERVER_client_drop (tcmc->client);
5731 * Handle SEND-message.
5733 * @param cls closure (always NULL)
5734 * @param client identification of the client
5735 * @param message the actual message
5738 handle_send (void *cls,
5739 struct GNUNET_SERVER_Client *client,
5740 const struct GNUNET_MessageHeader *message)
5742 const struct OutboundMessage *obm;
5743 const struct GNUNET_MessageHeader *obmm;
5744 struct TransmitClientMessageContext *tcmc;
5748 size = ntohs (message->size);
5750 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
5753 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5756 GNUNET_STATISTICS_update (stats,
5757 gettext_noop ("# payload received for other peers"),
5760 obm = (const struct OutboundMessage *) message;
5761 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
5762 msize = size - sizeof (struct OutboundMessage);
5764 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5765 "Received `%s' request from client with target `%4s' and message of type %u and size %u\n",
5766 "SEND", GNUNET_i2s (&obm->peer),
5770 tcmc = GNUNET_malloc (sizeof (struct TransmitClientMessageContext) + msize);
5771 tcmc->client = client;
5772 tcmc->priority = ntohl (obm->priority);
5773 tcmc->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_ntoh (obm->timeout));
5774 tcmc->msize = msize;
5775 /* FIXME: this memcpy can be up to 7% of our total runtime */
5776 memcpy (&tcmc[1], obmm, msize);
5777 GNUNET_SERVER_client_keep (client);
5778 setup_peer_check_blacklist (&obm->peer, GNUNET_YES,
5779 &transmit_client_message,
5785 * Handle request connect message
5787 * @param cls closure (always NULL)
5788 * @param client identification of the client
5789 * @param message the actual message
5792 handle_request_connect (void *cls,
5793 struct GNUNET_SERVER_Client *client,
5794 const struct GNUNET_MessageHeader *message)
5796 const struct TransportRequestConnectMessage *trcm =
5797 (const struct TransportRequestConnectMessage *) message;
5799 GNUNET_STATISTICS_update (stats,
5800 gettext_noop ("# REQUEST CONNECT messages received"),
5804 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
5805 "Received a request connect message for peer `%s'\n",
5806 GNUNET_i2s(&trcm->peer));
5808 setup_peer_check_blacklist (&trcm->peer, GNUNET_YES,
5810 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5815 * Handle SET_QUOTA-message.
5817 * @param cls closure (always NULL)
5818 * @param client identification of the client
5819 * @param message the actual message
5822 handle_set_quota (void *cls,
5823 struct GNUNET_SERVER_Client *client,
5824 const struct GNUNET_MessageHeader *message)
5826 const struct QuotaSetMessage *qsm =
5827 (const struct QuotaSetMessage *) message;
5828 struct NeighbourList *n;
5830 GNUNET_STATISTICS_update (stats,
5831 gettext_noop ("# SET QUOTA messages received"),
5834 n = find_neighbour (&qsm->peer);
5837 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5838 GNUNET_STATISTICS_update (stats,
5839 gettext_noop ("# SET QUOTA messages ignored (no such peer)"),
5845 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5846 "Received `%s' request (new quota %u, old quota %u) from client for peer `%4s'\n",
5848 (unsigned int) ntohl (qsm->quota.value__),
5849 (unsigned int) n->in_tracker.available_bytes_per_s__,
5850 GNUNET_i2s (&qsm->peer));
5852 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker,
5854 if (0 == ntohl (qsm->quota.value__))
5857 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5858 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&n->id),
5861 GNUNET_STATISTICS_update (stats,
5862 gettext_noop ("# disconnects due to quota of 0"),
5865 disconnect_neighbour (n, GNUNET_NO);
5867 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5872 * Take the given address and append it to the set of results sent back to
5875 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
5876 * @param address the resolved name, NULL to indicate the last response
5879 transmit_address_to_client (void *cls, const char *address)
5881 struct GNUNET_SERVER_TransmitContext *tc = cls;
5884 if (NULL != address)
5886 slen = strlen (address) + 1;
5887 GNUNET_SERVER_transmit_context_append_data (tc, address, slen,
5888 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5892 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
5898 * Handle AddressLookup-message.
5900 * @param cls closure (always NULL)
5901 * @param client identification of the client
5902 * @param message the actual message
5905 handle_address_lookup (void *cls,
5906 struct GNUNET_SERVER_Client *client,
5907 const struct GNUNET_MessageHeader *message)
5909 const struct AddressLookupMessage *alum;
5910 struct TransportPlugin *lsPlugin;
5911 const char *nameTransport;
5912 const char *address;
5914 struct GNUNET_SERVER_TransmitContext *tc;
5915 struct GNUNET_TIME_Absolute timeout;
5916 struct GNUNET_TIME_Relative rtimeout;
5919 size = ntohs (message->size);
5920 if (size < sizeof (struct AddressLookupMessage))
5922 GNUNET_break_op (0);
5923 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5926 alum = (const struct AddressLookupMessage *) message;
5927 uint32_t addressLen = ntohl (alum->addrlen);
5928 if (size <= sizeof (struct AddressLookupMessage) + addressLen)
5930 GNUNET_break_op (0);
5931 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5934 address = (const char *) &alum[1];
5935 nameTransport = (const char *) &address[addressLen];
5937 [size - sizeof (struct AddressLookupMessage) - addressLen - 1] != '\0')
5939 GNUNET_break_op (0);
5940 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5943 timeout = GNUNET_TIME_absolute_ntoh (alum->timeout);
5944 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5945 numeric = ntohl (alum->numeric_only);
5946 lsPlugin = find_transport (nameTransport);
5947 if (NULL == lsPlugin)
5949 tc = GNUNET_SERVER_transmit_context_create (client);
5950 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5951 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5952 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
5955 GNUNET_SERVER_disable_receive_done_warning (client);
5956 tc = GNUNET_SERVER_transmit_context_create (client);
5957 lsPlugin->api->address_pretty_printer (lsPlugin->api->cls,
5959 address, addressLen,
5962 &transmit_address_to_client, tc);
5967 * Setup the environment for this plugin.
5970 create_environment (struct TransportPlugin *plug)
5972 plug->env.cfg = cfg;
5973 plug->env.my_identity = &my_identity;
5974 plug->env.our_hello = &our_hello;
5975 plug->env.cls = plug;
5976 plug->env.receive = &plugin_env_receive;
5977 plug->env.notify_address = &plugin_env_notify_address;
5978 plug->env.session_end = &plugin_env_session_end;
5979 plug->env.max_connections = max_connect_per_transport;
5980 plug->env.stats = stats;
5985 * Start the specified transport (load the plugin).
5988 start_transport (struct GNUNET_SERVER_Handle *server,
5991 struct TransportPlugin *plug;
5994 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5995 _("Loading `%s' transport plugin\n"), name);
5996 GNUNET_asprintf (&libname, "libgnunet_plugin_transport_%s", name);
5997 plug = GNUNET_malloc (sizeof (struct TransportPlugin));
5998 create_environment (plug);
5999 plug->short_name = GNUNET_strdup (name);
6000 plug->lib_name = libname;
6001 plug->next = plugins;
6003 plug->api = GNUNET_PLUGIN_load (libname, &plug->env);
6004 if (plug->api == NULL)
6006 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6007 _("Failed to load transport plugin for `%s'\n"), name);
6008 GNUNET_free (plug->short_name);
6009 plugins = plug->next;
6010 GNUNET_free (libname);
6017 * Called whenever a client is disconnected. Frees our
6018 * resources associated with that client.
6020 * @param cls closure
6021 * @param client identification of the client
6024 client_disconnect_notification (void *cls,
6025 struct GNUNET_SERVER_Client *client)
6027 struct TransportClient *pos;
6028 struct TransportClient *prev;
6029 struct ClientMessageQueueEntry *mqe;
6030 struct Blacklisters *bl;
6031 struct BlacklistCheck *bc;
6036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
6037 "Client disconnected, cleaning up.\n");
6039 /* clean up blacklister */
6043 if (bl->client == client)
6048 if (bc->bl_pos == bl)
6050 bc->bl_pos = bl->next;
6053 GNUNET_CONNECTION_notify_transmit_ready_cancel (bc->th);
6056 if (bc->task == GNUNET_SCHEDULER_NO_TASK)
6057 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
6063 GNUNET_CONTAINER_DLL_remove (bl_head,
6066 GNUNET_SERVER_client_drop (bl->client);
6072 /* clean up 'normal' clients */
6075 while ((pos != NULL) && (pos->client != client))
6082 while (NULL != (mqe = pos->message_queue_head))
6084 GNUNET_CONTAINER_DLL_remove (pos->message_queue_head,
6085 pos->message_queue_tail,
6087 pos->message_count--;
6091 clients = pos->next;
6093 prev->next = pos->next;
6094 if (GNUNET_YES == pos->tcs_pending)
6099 if (pos->th != NULL)
6101 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
6104 GNUNET_break (0 == pos->message_count);
6110 * Function called when the service shuts down. Unloads our plugins
6111 * and cancels pending validations.
6113 * @param cls closure, unused
6114 * @param tc task context (unused)
6117 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6119 struct TransportPlugin *plug;
6120 struct OwnAddressList *al;
6121 struct CheckHelloValidatedContext *chvc;
6123 shutdown_in_progress = GNUNET_YES;
6124 while (neighbours != NULL)
6127 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6128 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&neighbours->id),
6131 disconnect_neighbour (neighbours, GNUNET_NO);
6134 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6135 "Transport service is unloading plugins...\n");
6137 while (NULL != (plug = plugins))
6139 plugins = plug->next;
6140 if (plug->address_update_task != GNUNET_SCHEDULER_NO_TASK)
6142 GNUNET_SCHEDULER_cancel (plug->address_update_task);
6143 plug->address_update_task = GNUNET_SCHEDULER_NO_TASK;
6145 GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
6146 GNUNET_free (plug->lib_name);
6147 GNUNET_free (plug->short_name);
6148 while (NULL != (al = plug->addresses))
6150 plug->addresses = al->next;
6155 if (my_private_key != NULL)
6156 GNUNET_CRYPTO_rsa_key_free (my_private_key);
6157 GNUNET_free_non_null (our_hello);
6159 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
6162 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6163 validation_map = NULL;
6167 /* free 'chvc' data structure */
6168 while (NULL != (chvc = chvc_head))
6170 chvc_head = chvc->next;
6171 if (chvc->piter != NULL)
6173 GNUNET_PEERINFO_iterate_cancel (chvc->piter);
6174 GNUNET_STATISTICS_update (stats,
6175 gettext_noop ("# outstanding peerinfo iterate requests"),
6182 GNUNET_assert (chvc->ve_count == 0);
6189 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6192 if (peerinfo != NULL)
6194 GNUNET_PEERINFO_disconnect (peerinfo);
6197 /* Can we assume those are gone by now, or do we need to clean up
6199 GNUNET_break (bl_head == NULL);
6200 GNUNET_break (bc_head == NULL);
6204 static int ats_evaluate_results (int result, int solution, char * problem)
6206 int cont = GNUNET_NO;
6207 #if DEBUG_ATS || VERBOSE_ATS
6208 int error_kind = GNUNET_ERROR_TYPE_DEBUG;
6211 error_kind = GNUNET_ERROR_TYPE_ERROR;
6215 case GNUNET_SYSERR : /* GNUNET problem, not GLPK related */
6216 #if DEBUG_ATS || VERBOSE_ATS
6217 GNUNET_log (error_kind, "%s , GLPK solving not executed\n", problem);
6220 case GLP_ESTOP : /* search terminated by application */
6221 #if DEBUG_ATS || VERBOSE_ATS
6222 GNUNET_log (error_kind, "%s , Search terminated by application\n", problem);
6225 case GLP_EITLIM : /* iteration limit exceeded */
6226 #if DEBUG_ATS || VERBOSE_ATS
6227 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Iteration limit exceeded\n", problem);
6230 case GLP_ETMLIM : /* time limit exceeded */
6231 #if DEBUG_ATS || VERBOSE_ATS
6232 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Time limit exceeded\n", problem);
6235 case GLP_ENOPFS : /* no primal feasible solution */
6236 case GLP_ENODFS : /* no dual feasible solution */
6237 #if DEBUG_ATS || VERBOSE_ATS
6238 GNUNET_log (error_kind, "%s No feasible solution\n", problem);
6242 case GLP_EBADB : /* invalid basis */
6243 case GLP_ESING : /* singular matrix */
6244 case GLP_ECOND : /* ill-conditioned matrix */
6245 case GLP_EBOUND : /* invalid bounds */
6246 case GLP_EFAIL : /* solver failed */
6247 case GLP_EOBJLL : /* objective lower limit reached */
6248 case GLP_EOBJUL : /* objective upper limit reached */
6249 case GLP_EROOT : /* root LP optimum not provided */
6250 #if DEBUG_ATS || VERBOSE_ATS
6251 GNUNET_log (error_kind, "%s Invalid Input data: %i\n", problem, result);
6256 #if DEBUG_ATS || VERBOSE_ATS
6257 GNUNET_log (error_kind, "%s Problem has been solved\n", problem);
6264 #if DEBUG_ATS || VERBOSE_ATS
6265 GNUNET_log (error_kind, "%s solution is undefined\n", problem);
6269 #if DEBUG_ATS || VERBOSE_ATS
6270 GNUNET_log (error_kind, "%s solution is optimal\n", problem);
6275 #if DEBUG_ATS || VERBOSE_ATS
6276 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"));
6281 #if DEBUG_ATS || VERBOSE_ATS
6282 GNUNET_log (error_kind, "%s problem has no %sfeasible solution\n", problem, (0==strcmp(problem,"LP")?"":"integer "));
6286 #if DEBUG_ATS || VERBOSE_ATS
6287 GNUNET_log (error_kind, "%s problem is infeasible \n", problem);
6291 #if DEBUG_ATS || VERBOSE_ATS
6292 GNUNET_log (error_kind, "%s problem is unbounded \n", problem);
6300 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)
6302 int result = GNUNET_SYSERR;
6303 int lp_solution = GNUNET_SYSERR;
6304 int mlp_solution = GNUNET_SYSERR;
6308 glp_init_smcp(&opt_lp);
6310 opt_lp.msg_lev = GLP_MSG_ALL;
6312 opt_lp.msg_lev = GLP_MSG_OFF;
6315 // setting iteration limit
6316 opt_lp.it_lim = max_it;
6318 opt_lp.tm_lim = max_dur;
6320 if (ats->stat.recreate_problem == GNUNET_YES)
6321 opt_lp.presolve = GLP_ON;
6322 result = glp_simplex(ats->prob, &opt_lp);
6323 lp_solution = glp_get_status (ats->prob);
6325 if ((result == GLP_ETMLIM) || (result == GLP_EITLIM))
6327 ats->stat.valid = GNUNET_NO;
6328 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ATS exceeded time or iteration limit!\n");
6332 if (ats_evaluate_results(result, lp_solution, "LP") == GNUNET_YES)
6334 stat->valid = GNUNET_YES;
6338 ats->stat.simplex_rerun_required = GNUNET_YES;
6339 opt_lp.presolve = GLP_ON;
6340 result = glp_simplex(ats->prob, &opt_lp);
6341 lp_solution = glp_get_status (ats->prob);
6343 // TODO: Remove if this does not appear until release
6344 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "EXECUTED SIMPLEX WITH PRESOLVER! %i \n", lp_solution);
6346 if (ats_evaluate_results(result, lp_solution, "LP") != GNUNET_YES)
6348 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "After execution simplex with presolver: STILL INVALID!\n");
6350 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);
6351 glp_write_lp (ats->prob, NULL, filename);
6352 GNUNET_free (filename);
6353 stat->valid = GNUNET_NO;
6354 ats->stat.recreate_problem = GNUNET_YES;
6357 stat->valid = GNUNET_YES;
6362 glp_init_iocp(&opt_mlp);
6364 opt_mlp.tm_lim = max_dur;
6367 opt_mlp.msg_lev = GLP_MSG_ALL;
6369 opt_mlp.msg_lev = GLP_MSG_OFF;
6372 result = glp_intopt (ats->prob, &opt_mlp);
6373 mlp_solution = glp_mip_status (ats->prob);
6374 stat->solution = mlp_solution;
6376 if (ats_evaluate_results(result, mlp_solution, "MLP") == GNUNET_YES)
6378 stat->valid = GNUNET_YES;
6382 // TODO: Remove if this does not appear until release
6383 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);
6384 stat->valid = GNUNET_NO;
6389 int error = GNUNET_NO;
6391 struct ATS_mechanism *t = NULL;
6392 for (c=1; c<= (c_peers); c++ )
6395 t = peers[c].m_head;
6398 bw = glp_get_col_prim(prob, t->col_index);
6402 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);
6404 if (check ==GNUNET_YES)
6406 glp_write_sol(prob, "invalid_solution.mlp");
6407 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid solution, check invalid_solution.mlp");
6408 GNUNET_STATISTICS_update (stats, "ATS invalid solutions", 1, GNUNET_NO);
6411 if (check ==GNUNET_NO)
6419 if (glp_get_col_prim(ats->prob,2*c_mechs+1) != 1)
6422 for (c=1; c<= available_quality_metrics; c++ )
6424 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));
6426 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));
6427 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));
6428 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));
6429 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "objective value: %f\n", glp_mip_obj_val(ats->prob));
6434 static void ats_delete_problem ()
6437 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Deleting problem\n");
6441 for (c=0; c< (ats->stat).c_mechs; c++)
6442 GNUNET_free_non_null (ats->mechanisms[c].rc);
6445 if (ats->mechanisms!=NULL)
6447 GNUNET_free(ats->mechanisms);
6448 ats->mechanisms = NULL;
6451 if (ats->peers!=NULL)
6453 GNUNET_free(ats->peers);
6457 if (ats->prob != NULL)
6459 glp_delete_prob(ats->prob);
6463 ats->stat.begin_cr = GNUNET_SYSERR;
6464 ats->stat.begin_qm = GNUNET_SYSERR;
6465 ats->stat.c_mechs = 0;
6466 ats->stat.c_peers = 0;
6467 ats->stat.end_cr = GNUNET_SYSERR;
6468 ats->stat.end_qm = GNUNET_SYSERR;
6469 ats->stat.solution = GNUNET_SYSERR;
6470 ats->stat.valid = GNUNET_SYSERR;
6474 static void ats_update_problem_qm ()
6479 int c_q_metrics = available_quality_metrics;
6481 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6482 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6484 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6486 row_index = ats->stat.begin_qm;
6488 for (c=1; c <= c_q_metrics; c++)
6493 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6496 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6497 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6499 ja[array_index] = c2;
6501 GNUNET_assert (ats->mechanisms[c2].addr != NULL);
6502 GNUNET_assert (ats->mechanisms[c2].peer != NULL);
6504 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
6506 double v0 = 0, v1 = 0, v2 = 0;
6508 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6509 if (v1 < 1) v0 = 0.1;
6510 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6511 if (v1 < 1) v0 = 0.1;
6512 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6513 if (v1 < 1) v0 = 0.1;
6514 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
6517 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
6519 double v0 = 0, v1 = 0, v2 = 0;
6520 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6522 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6524 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6526 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
6528 value = (double) 10 / value;
6532 ar[array_index] = (ats->mechanisms[c2].peer->f) * value;
6534 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]);
6538 ja[array_index] = ats->stat.col_qm + c - 1;
6539 ar[array_index] = -1;
6542 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6544 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6550 GNUNET_free_non_null (ja);
6551 GNUNET_free_non_null (ar);
6555 static void ats_update_problem_cr ()
6561 double ct_max, ct_min;
6563 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6564 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6566 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6567 row_index = ats->stat.begin_cr;
6570 for (c=0; c<available_ressources; c++)
6572 ct_max = ressources[c].c_max;
6573 ct_min = ressources[c].c_min;
6575 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
6577 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
6579 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6583 GNUNET_assert (ats->mechanisms[c2].addr != NULL);
6584 GNUNET_assert (ats->mechanisms[c2].peer != NULL);
6586 ja[array_index] = c2;
6587 value = ats->mechanisms[c2].addr->ressources[c].c;
6588 ar[array_index] = value;
6590 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6594 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6600 GNUNET_free_non_null (ja);
6601 GNUNET_free_non_null (ar);
6606 static void ats_update_problem_qm_TEST ()
6611 int old_ja[ats->stat.c_mechs + 2];
6612 double old_ar[ats->stat.c_mechs + 2];
6616 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6617 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6619 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics TEST\n");
6621 if (ats->stat.begin_qm >0)
6622 row_index = ats->stat.begin_qm;
6627 for (c=0; c<available_quality_metrics; c++)
6630 c_old = glp_get_mat_row (ats->prob, row_index, old_ja, old_ar);
6632 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6634 for (c2=1; c2<=c_old; c2++)
6636 ja[c2] = old_ja[c2];
6637 if ((changed < 3) && (c2>2) && (old_ar[c2] != -1))
6639 ar[c2] = old_ar[c2] + 5 - changed;
6643 ar[c2] = old_ar[c2];
6645 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]);
6648 glp_set_mat_row (ats->prob, row_index, c_old, ja, ar);
6653 GNUNET_free_non_null (ja);
6654 GNUNET_free_non_null (ar);
6656 #endif //END: HAVE_LIBGLPK
6658 /** solve the bandwidth distribution problem
6659 * @param max_it maximum iterations
6660 * @param max_dur maximum duration in ms
6661 * @param D weight for diversity
6662 * @param U weight for utility
6663 * @param R weight for relativity
6664 * @param v_b_min minimal bandwidth per peer
6665 * @param v_n_min minimum number of connections
6666 * @param stat result struct
6667 * @return GNUNET_SYSERR if glpk is not available, number of mechanisms used
6669 static int ats_create_problem (double D, double U, double R, int v_b_min, int v_n_min, struct ATS_stat *stat)
6671 ats->prob = glp_create_prob();
6677 int c_c_ressources = available_ressources;
6678 int c_q_metrics = available_quality_metrics;
6680 double M = VERY_BIG_DOUBLE_VALUE;
6681 double Q[c_q_metrics+1];
6682 for (c=1; c<=c_q_metrics; c++)
6687 struct NeighbourList *next = neighbours;
6690 int found_addresses = GNUNET_NO;
6691 struct ReadyList *r_next = next->plugins;
6692 while (r_next != NULL)
6694 struct ForeignAddressList * a_next = r_next->addresses;
6695 while (a_next != NULL)
6698 found_addresses = GNUNET_YES;
6699 a_next = a_next->next;
6701 r_next = r_next->next;
6703 if (found_addresses) c_peers++;
6710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No addresses for bw distribution available\n", c_peers);
6712 stat->valid = GNUNET_NO;
6715 return GNUNET_SYSERR;
6718 GNUNET_assert (ats->mechanisms == NULL);
6719 ats->mechanisms = GNUNET_malloc((1+c_mechs) * sizeof (struct ATS_mechanism));
6720 GNUNET_assert (ats->peers == NULL);
6721 ats->peers = GNUNET_malloc((1+c_peers) * sizeof (struct ATS_peer));
6723 struct ATS_mechanism * mechanisms = ats->mechanisms;
6724 struct ATS_peer * peers = ats->peers;
6732 int found_addresses = GNUNET_NO;
6733 struct ReadyList *r_next = next->plugins;
6734 while (r_next != NULL)
6736 struct ForeignAddressList * a_next = r_next->addresses;
6737 while (a_next != NULL)
6739 if (found_addresses == GNUNET_NO)
6741 peers[c_peers].peer = next->id;
6742 peers[c_peers].m_head = NULL;
6743 peers[c_peers].m_tail = NULL;
6744 peers[c_peers].f = 1.0 / c_mechs;
6747 mechanisms[c_mechs].addr = a_next;
6748 mechanisms[c_mechs].col_index = c_mechs;
6749 mechanisms[c_mechs].peer = &peers[c_peers];
6750 mechanisms[c_mechs].next = NULL;
6751 mechanisms[c_mechs].plugin = r_next->plugin;
6753 GNUNET_CONTAINER_DLL_insert_tail(peers[c_peers].m_head, peers[c_peers].m_tail, &mechanisms[c_mechs]);
6754 found_addresses = GNUNET_YES;
6757 a_next = a_next->next;
6759 r_next = r_next->next;
6761 if (found_addresses == GNUNET_YES)
6768 if (v_n_min > c_peers)
6772 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);
6775 int size = 1 + 3 + 10 *c_mechs + c_peers + (c_q_metrics*c_mechs)+ c_q_metrics + c_c_ressources * c_mechs ;
6778 int * ia = GNUNET_malloc (size * sizeof (int));
6779 int * ja = GNUNET_malloc (size * sizeof (int));
6780 double * ar = GNUNET_malloc(size* sizeof (double));
6782 glp_set_prob_name(ats->prob, "gnunet ats bandwidth distribution");
6783 glp_set_obj_dir(ats->prob, GLP_MAX);
6785 /* adding columns */
6787 glp_add_cols(ats->prob, 2 * c_mechs);
6788 /* adding b_t cols */
6789 for (c=1; c <= c_mechs; c++)
6792 GNUNET_asprintf(&name, "p_%s_b%i",GNUNET_i2s(&(mechanisms[c].peer->peer)), c);
6793 glp_set_col_name(ats->prob, c, name);
6795 glp_set_col_bnds(ats->prob, c, GLP_LO, 0.0, 0.0);
6796 glp_set_col_kind(ats->prob, c, GLP_CV);
6797 glp_set_obj_coef(ats->prob, c, 0);
6800 /* adding n_t cols */
6801 for (c=c_mechs+1; c <= 2*c_mechs; c++)
6803 GNUNET_asprintf(&name, "p_%s_n%i",GNUNET_i2s(&(mechanisms[c-c_mechs].peer->peer)),(c-c_mechs));
6804 glp_set_col_name(ats->prob, c, name);
6806 glp_set_col_bnds(ats->prob, c, GLP_DB, 0.0, 1.0);
6807 glp_set_col_kind(ats->prob, c, GLP_IV);
6808 glp_set_obj_coef(ats->prob, c, 0);
6811 /* feasibility constraints */
6812 /* Constraint 1: one address per peer*/
6814 glp_add_rows(ats->prob, c_peers);
6815 for (c=1; c<=c_peers; c++)
6818 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6820 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 1.0, 1.0);
6822 struct ATS_mechanism *m = peers[c].m_head;
6825 ia[array_index] = row_index;
6826 ja[array_index] = (c_mechs + m->col_index);
6827 ar[array_index] = 1;
6829 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6837 /* Constraint 2: only active mechanism gets bandwidth assigned */
6838 glp_add_rows(ats->prob, c_mechs);
6839 for (c=1; c<=c_mechs; c++)
6841 /* b_t - n_t * M <= 0 */
6843 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6845 glp_set_row_bnds(ats->prob, row_index, GLP_UP, 0.0, 0.0);
6847 ia[array_index] = row_index;
6848 ja[array_index] = mechanisms[c].col_index;
6849 ar[array_index] = 1;
6851 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6854 ia[array_index] = row_index;
6855 ja[array_index] = c_mechs + mechanisms[c].col_index;
6856 ar[array_index] = -M;
6858 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6864 /* Constraint 3: minimum bandwidth*/
6865 glp_add_rows(ats->prob, c_mechs);
6866 for (c=1; c<=c_mechs; c++)
6868 /* b_t - n_t * b_min <= 0 */
6870 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6872 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
6874 ia[array_index] = row_index;
6875 ja[array_index] = mechanisms[c].col_index;
6876 ar[array_index] = 1;
6878 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6881 ia[array_index] = row_index;
6882 ja[array_index] = c_mechs + mechanisms[c].col_index;
6883 ar[array_index] = -v_b_min;
6885 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6891 /* Constraint 4: max ressource capacity */
6892 /* V cr: bt * ct_r <= cr_max
6894 glp_add_rows(ats->prob, available_ressources);
6895 double ct_max = VERY_BIG_DOUBLE_VALUE;
6896 double ct_min = 0.0;
6898 stat->begin_cr = array_index;
6900 for (c=0; c<available_ressources; c++)
6902 ct_max = ressources[c].c_max;
6903 ct_min = ressources[c].c_min;
6905 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
6907 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
6909 for (c2=1; c2<=c_mechs; c2++)
6912 ia[array_index] = row_index;
6913 ja[array_index] = c2;
6914 value = mechanisms[c2].addr->ressources[c].c;
6915 ar[array_index] = value;
6917 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6923 stat->end_cr = array_index--;
6925 /* Constraint 5: min number of connections*/
6926 glp_add_rows(ats->prob, 1);
6927 for (c=1; c<=c_mechs; c++)
6929 // b_t - n_t * b_min >= 0
6931 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6933 glp_set_row_bnds(ats->prob, row_index, GLP_LO, v_n_min, 0.0);
6935 ia[array_index] = row_index;
6936 ja[array_index] = c_mechs + mechanisms[c].col_index;
6937 ar[array_index] = 1;
6939 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6945 // optimisation constraints
6949 // Constraint 6: optimize for diversity
6951 col_d = glp_add_cols(ats->prob, 1);
6952 stat->col_d = col_d;
6953 //GNUNET_assert (col_d == (2*c_mechs) + 1);
6954 glp_set_col_name(ats->prob, col_d, "d");
6955 glp_set_obj_coef(ats->prob, col_d, D);
6956 glp_set_col_bnds(ats->prob, col_d, GLP_LO, 0.0, 0.0);
6957 glp_add_rows(ats->prob, 1);
6959 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6961 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6962 for (c=1; c<=c_mechs; c++)
6964 ia[array_index] = row_index;
6965 ja[array_index] = c_mechs + mechanisms[c].col_index;
6966 ar[array_index] = 1;
6968 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6972 ia[array_index] = row_index;
6973 ja[array_index] = col_d;
6974 ar[array_index] = -1;
6976 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6982 // Constraint 7: optimize for quality
6984 col_qm = glp_add_cols(ats->prob, c_q_metrics);
6985 stat->col_qm = col_qm;
6986 //GNUNET_assert (col_qm == (2*c_mechs) + 3 + 1);
6987 for (c=0; c< c_q_metrics; c++)
6989 GNUNET_asprintf(&name, "Q_%s",qm[c].name);
6990 glp_set_col_name(ats->prob, col_qm + c, name);
6991 glp_set_col_bnds(ats->prob, col_qm + c, GLP_LO, 0.0, 0.0);
6993 glp_set_obj_coef(ats->prob, col_qm + c, Q[c]);
6995 glp_add_rows(ats->prob, available_quality_metrics);
6996 stat->begin_qm = row_index;
6997 for (c=1; c <= c_q_metrics; c++)
7000 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
7003 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
7004 for (c2=1; c2<=c_mechs; c2++)
7007 ia[array_index] = row_index;
7008 ja[array_index] = c2;
7009 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
7011 double v0 = 0, v1 = 0, v2 = 0;
7012 v0 = mechanisms[c2].addr->quality[c-1].values[0];
7013 if (v1 < 1) v0 = 0.1;
7014 v1 = mechanisms[c2].addr->quality[c-1].values[1];
7015 if (v1 < 1) v0 = 0.1;
7016 v2 = mechanisms[c2].addr->quality[c-1].values[2];
7017 if (v1 < 1) v0 = 0.1;
7018 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
7021 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
7023 double v0 = 0, v1 = 0, v2 = 0;
7024 v0 = mechanisms[c2].addr->quality[c-1].values[0];
7026 v1 = mechanisms[c2].addr->quality[c-1].values[1];
7028 v2 = mechanisms[c2].addr->quality[c-1].values[2];
7030 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
7032 value = (double) 10 / value;
7036 ar[array_index] = (mechanisms[c2].peer->f) * value ;
7038 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]);
7043 ia[array_index] = row_index;
7044 ja[array_index] = col_qm + c - 1;
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]);
7052 stat->end_qm = row_index-1;
7054 // Constraint 8: optimize bandwidth utility
7056 col_u = glp_add_cols(ats->prob, 1);
7057 stat->col_u = col_u;
7058 //GNUNET_assert (col_u == (2*c_mechs) + 2);
7059 glp_set_col_name(ats->prob, col_u, "u");
7060 glp_set_obj_coef(ats->prob, col_u, U);
7061 glp_set_col_bnds(ats->prob, col_u, GLP_LO, 0.0, 0.0);
7062 glp_add_rows(ats->prob, 1);
7064 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
7066 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
7067 for (c=1; c<=c_mechs; c++)
7069 ia[array_index] = row_index;
7070 ja[array_index] = c;
7071 ar[array_index] = mechanisms[c].peer->f;
7073 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7077 ia[array_index] = row_index;
7078 ja[array_index] = col_u;
7079 ar[array_index] = -1;
7081 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7087 // Constraint 9: optimize relativity
7089 col_r = glp_add_cols(ats->prob, 1);
7090 stat->col_r = col_r;
7091 //GNUNET_assert (col_r == (2*c_mechs) + 3);
7092 glp_set_col_name(ats->prob, col_r, "r");
7093 glp_set_obj_coef(ats->prob, col_r, R);
7094 glp_set_col_bnds(ats->prob, col_r, GLP_LO, 0.0, 0.0);
7095 glp_add_rows(ats->prob, c_peers);
7096 for (c=1; c<=c_peers; c++)
7098 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
7100 struct ATS_mechanism *m = peers[c].m_head;
7103 ia[array_index] = row_index;
7104 ja[array_index] = m->col_index;
7105 ar[array_index] = 1 / mechanisms[c].peer->f;
7107 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7112 ia[array_index] = row_index;
7113 ja[array_index] = col_r;
7114 ar[array_index] = -1;
7116 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
7123 /* Loading the matrix */
7124 glp_load_matrix(ats->prob, array_index-1, ia, ja, ar);
7126 stat->c_mechs = c_mechs;
7127 stat->c_peers = c_peers;
7129 stat->valid = GNUNET_YES;
7141 void ats_notify_ats_data (
7142 const struct GNUNET_PeerIdentity *peer,
7143 const struct GNUNET_TRANSPORT_ATS_Information *ats_data)
7146 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ATS_notify_ats_data: %s\n",GNUNET_i2s(peer));
7148 if (shutdown_in_progress == GNUNET_NO)
7149 ats_calculate_bandwidth_distribution();
7151 #endif //END: HAVE_LIBGLPK
7154 ats_calculate_bandwidth_distribution ()
7158 struct GNUNET_TIME_Absolute start;
7159 struct GNUNET_TIME_Relative creation;
7160 struct GNUNET_TIME_Relative solving;
7161 char *text = "unmodified";
7163 struct GNUNET_TIME_Relative delta = GNUNET_TIME_absolute_get_difference (ats->last, GNUNET_TIME_absolute_get());
7164 if (delta.rel_value < ats->min_delta.rel_value)
7167 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "Minimum time between cycles not reached\n");
7172 if (shutdown_in_progress == GNUNET_YES)
7175 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "Transport service is shutting down\n");
7182 if (INT_MAX < ats->max_exec_duration.rel_value)
7185 dur = (int) ats->max_exec_duration.rel_value;
7188 ats->stat.simplex_rerun_required = GNUNET_NO;
7189 start = GNUNET_TIME_absolute_get();
7190 if ((ats->stat.recreate_problem == GNUNET_YES) || (ats->prob==NULL) || (ats->stat.valid == GNUNET_NO))
7193 ats->stat.recreate_problem = GNUNET_YES;
7194 ats_delete_problem ();
7195 ats_create_problem (ats->D, ats->U, ats->R, ats->v_b_min, ats->v_n_min, &ats->stat);
7197 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);
7201 else if ((ats->stat.recreate_problem == GNUNET_NO) && (ats->stat.modified_resources == GNUNET_YES) && (ats->stat.valid == GNUNET_YES))
7203 text = "modified resources";
7204 ats_update_problem_cr();
7206 else if ((ats->stat.recreate_problem == GNUNET_NO) && (ats->stat.modified_quality == GNUNET_YES) && (ats->stat.valid == GNUNET_YES))
7208 text = "modified quality";
7209 ats_update_problem_qm();
7210 //ats_update_problem_qm_TEST ();
7214 else GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Problem is unmodified\n");
7217 creation = GNUNET_TIME_absolute_get_difference(start,GNUNET_TIME_absolute_get());
7218 start = GNUNET_TIME_absolute_get();
7220 ats->stat.solution = GLP_UNDEF;
7221 if (ats->stat.valid == GNUNET_YES)
7223 ats_solve_problem(ats->max_iterations, ats->max_exec_duration.rel_value, ats->stat.c_peers, ats->stat.c_mechs, &ats->stat);
7225 solving = GNUNET_TIME_absolute_get_difference(start,GNUNET_TIME_absolute_get());
7227 if (ats->stat.valid == GNUNET_YES)
7229 int msg_type = GNUNET_ERROR_TYPE_DEBUG;
7231 msg_type = GNUNET_ERROR_TYPE_ERROR;
7233 GNUNET_log (msg_type, "MLP %s: creation time: %llu, execution time: %llu, %i mechanisms, simplex rerun: %s, solution %s\n",
7234 text, creation.rel_value, solving.rel_value,
7236 (ats->stat.simplex_rerun_required == GNUNET_NO) ? "NO" : "YES", (ats->stat.solution == 5) ? "OPTIMAL" : "INVALID");
7237 ats->successful_executions ++;
7238 GNUNET_STATISTICS_set (stats, "# ATS successful executions", ats->successful_executions, GNUNET_NO);
7240 if ((ats->stat.recreate_problem == GNUNET_YES) || (ats->prob==NULL))
7241 GNUNET_STATISTICS_set (stats, "ATS state",ATS_NEW, GNUNET_NO);
7242 else if ((ats->stat.modified_resources == GNUNET_YES) &&
7243 (ats->stat.modified_quality == GNUNET_NO))
7244 GNUNET_STATISTICS_set (stats, "ATS state", ATS_C_UPDATED, GNUNET_NO);
7245 else if ((ats->stat.modified_resources == GNUNET_NO) &&
7246 (ats->stat.modified_quality == GNUNET_YES) &&
7247 (ats->stat.simplex_rerun_required == GNUNET_NO))
7248 GNUNET_STATISTICS_set (stats, "ATS state", ATS_Q_UPDATED, GNUNET_NO);
7249 else if ((ats->stat.modified_resources == GNUNET_YES) &&
7250 (ats->stat.modified_quality == GNUNET_YES) &&
7251 (ats->stat.simplex_rerun_required == GNUNET_NO))
7252 GNUNET_STATISTICS_set (stats, "ATS state", ATS_QC_UPDATED, GNUNET_NO);
7253 else if (ats->stat.simplex_rerun_required == GNUNET_NO)
7254 GNUNET_STATISTICS_set (stats, "ATS state", ATS_UNMODIFIED, GNUNET_NO);
7258 if (ats->stat.c_peers != 0)
7260 ats->invalid_executions ++;
7261 GNUNET_STATISTICS_set (stats, "# ATS invalid executions", ats->invalid_executions, GNUNET_NO);
7265 GNUNET_STATISTICS_set (stats, "# ATS successful executions", ats->successful_executions, GNUNET_NO);
7269 GNUNET_STATISTICS_set (stats, "ATS duration", solving.rel_value + creation.rel_value, GNUNET_NO);
7270 GNUNET_STATISTICS_set (stats, "ATS mechanisms", ats->stat.c_mechs, GNUNET_NO);
7271 GNUNET_STATISTICS_set (stats, "ATS peers", ats->stat.c_peers, GNUNET_NO);
7272 GNUNET_STATISTICS_set (stats, "ATS solution", ats->stat.solution, GNUNET_NO);
7273 GNUNET_STATISTICS_set (stats, "ATS timestamp", start.abs_value, GNUNET_NO);
7275 if ((ats->save_mlp == GNUNET_YES) && (ats->stat.c_mechs >= ats->dump_min_peers) && (ats->stat.c_mechs >= ats->dump_min_addr))
7278 if (ats->dump_overwrite == GNUNET_NO)
7280 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i_%s_%llu.mlp",
7281 ats->stat.c_peers, ats->stat.c_mechs, text, GNUNET_TIME_absolute_get().abs_value);
7282 glp_write_lp (ats->prob, NULL, filename);
7286 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i.mlp",
7287 ats->stat.c_peers, ats->stat.c_mechs );
7288 glp_write_lp (ats->prob, NULL, filename);
7290 GNUNET_free (filename);
7292 if ((ats->save_solution == GNUNET_YES) && (ats->stat.c_mechs >= ats->dump_min_peers) && (ats->stat.c_mechs >= ats->dump_min_addr))
7295 if (ats->dump_overwrite == GNUNET_NO)
7297 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i_%s_%llu.sol",
7298 ats->stat.c_peers, ats->stat.c_mechs, text, GNUNET_TIME_absolute_get().abs_value);
7299 glp_print_sol (ats->prob, filename);
7303 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i.sol",
7304 ats->stat.c_peers, ats->stat.c_mechs);
7305 glp_print_sol (ats->prob, filename);
7307 GNUNET_free (filename);
7310 ats->last = GNUNET_TIME_absolute_get();
7311 ats->stat.recreate_problem = GNUNET_NO;
7312 ats->stat.modified_resources = GNUNET_NO;
7313 ats->stat.modified_quality = GNUNET_NO;
7318 ats_schedule_calculation (void *cls,
7319 const struct GNUNET_SCHEDULER_TaskContext *tc)
7321 struct ATS_info *ats = (struct ATS_info *) cls;
7322 if (ats==NULL) return;
7324 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7325 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
7328 if (shutdown_in_progress == GNUNET_YES)
7332 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Running scheduled calculation\n");
7335 ats_calculate_bandwidth_distribution (ats);
7337 ats->ats_task = GNUNET_SCHEDULER_add_delayed (ats->exec_interval,
7338 &ats_schedule_calculation, ats);
7344 unsigned long long value;
7347 ats = GNUNET_malloc(sizeof (struct ATS_info));
7349 ats->min_delta = ATS_MIN_INTERVAL;
7350 ats->exec_interval = ATS_EXEC_INTERVAL;
7351 ats->max_exec_duration = ATS_MAX_EXEC_DURATION;
7352 ats->max_iterations = ATS_MAX_ITERATIONS;
7353 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7356 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ATS not active\n");
7363 ats->v_b_min = 64000;
7365 ats->dump_min_peers = 1;
7366 ats->dump_min_addr = 1;
7367 ats->dump_overwrite = GNUNET_NO;
7368 ats->mechanisms = NULL;
7370 ats->successful_executions = 0;
7371 ats->invalid_executions = 0;
7377 /* loading cost ressources */
7378 for (c=0; c<available_ressources; c++)
7380 GNUNET_asprintf(§ion,"%s_UP",ressources[c].cfg_param);
7381 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
7383 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "transport",section, &value))
7386 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found ressource cost: [%s] = %llu\n", section, value);
7388 ressources[c].c_max = value;
7391 GNUNET_free (section);
7392 GNUNET_asprintf(§ion,"%s_DOWN",ressources[c].cfg_param);
7393 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
7395 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "transport",section, &value))
7398 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found ressource cost: [%s] = %llu\n", section, value);
7400 ressources[c].c_min = value;
7403 GNUNET_free (section);
7406 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MLP"))
7407 ats->save_mlp = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_MLP");
7409 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_SOLUTION"))
7410 ats->save_solution = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_SOLUTION");
7411 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
7412 ats->dump_overwrite = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_OVERWRITE");
7413 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_PEERS"))
7415 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_MIN_PEERS", &value);
7416 ats->dump_min_peers= value;
7418 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_ADDRS"))
7420 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_MIN_ADDRS", &value);
7421 ats->dump_min_addr= value;
7423 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
7425 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_OVERWRITE", &value);
7426 ats->min_delta.rel_value = value;
7429 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
7431 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_MIN_INTERVAL", &value);
7432 ats->min_delta.rel_value = value;
7435 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_EXEC_INTERVAL"))
7437 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_EXEC_INTERVAL", &value);
7438 ats->exec_interval.rel_value = value;
7440 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
7442 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_MIN_INTERVAL", &value);
7443 ats->min_delta.rel_value = value;
7446 ats->ats_task = GNUNET_SCHEDULER_add_now(&ats_schedule_calculation, ats);
7450 static void ats_shutdown ()
7453 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_destroy\n");
7455 if (ats->ats_task != GNUNET_SCHEDULER_NO_TASK)
7456 GNUNET_SCHEDULER_cancel(ats->ats_task);
7457 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7460 ats_delete_problem ();
7467 void ats_notify_peer_connect (
7468 const struct GNUNET_PeerIdentity *peer,
7469 const struct GNUNET_TRANSPORT_ATS_Information *ats_data, int ats_count)
7472 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_connect: %s\n",GNUNET_i2s(peer));
7474 //update_addr_ats();
7475 ats->stat.recreate_problem = GNUNET_YES;
7476 ats_calculate_bandwidth_distribution(ats);
7479 void ats_notify_peer_disconnect (
7480 const struct GNUNET_PeerIdentity *peer)
7483 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_disconnect: %s\n",GNUNET_i2s(peer));
7485 ats->stat.recreate_problem = GNUNET_YES;
7486 ats_calculate_bandwidth_distribution (ats);
7489 struct ForeignAddressList * ats_get_preferred_address (
7490 struct NeighbourList *n)
7493 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ats_get_prefered_transport for peer: %s\n",GNUNET_i2s(&n->id));
7495 struct ReadyList *next = n->plugins;
7496 while (next != NULL)
7499 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "plugin: %s %i\n",next->plugin->short_name,strcmp(next->plugin->short_name,"unix"));
7503 return find_ready_address(n);
7507 * Initiate transport service.
7509 * @param cls closure
7510 * @param server the initialized server
7511 * @param c configuration to use
7515 struct GNUNET_SERVER_Handle *server,
7516 const struct GNUNET_CONFIGURATION_Handle *c)
7518 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
7519 {&handle_start, NULL,
7520 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
7521 {&handle_hello, NULL,
7522 GNUNET_MESSAGE_TYPE_HELLO, 0},
7523 {&handle_send, NULL,
7524 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
7525 {&handle_request_connect, NULL,
7526 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT, sizeof(struct TransportRequestConnectMessage)},
7527 {&handle_set_quota, NULL,
7528 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
7529 {&handle_address_lookup, NULL,
7530 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP,
7532 {&handle_blacklist_init, NULL,
7533 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT, sizeof (struct GNUNET_MessageHeader)},
7534 {&handle_blacklist_reply, NULL,
7535 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY, sizeof (struct BlacklistMessage)},
7541 unsigned long long tneigh;
7544 shutdown_in_progress = GNUNET_NO;
7546 stats = GNUNET_STATISTICS_create ("transport", cfg);
7547 validation_map = GNUNET_CONTAINER_multihashmap_create (64);
7548 /* parse configuration */
7550 GNUNET_CONFIGURATION_get_value_number (c,
7555 GNUNET_CONFIGURATION_get_value_filename (c,
7557 "HOSTKEY", &keyfile)))
7559 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7561 ("Transport service is lacking key configuration settings. Exiting.\n"));
7562 GNUNET_SCHEDULER_shutdown ();
7565 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7568 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7569 validation_map = NULL;
7573 max_connect_per_transport = (uint32_t) tneigh;
7574 peerinfo = GNUNET_PEERINFO_connect (cfg);
7575 if (peerinfo == NULL)
7577 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7578 _("Could not access PEERINFO service. Exiting.\n"));
7579 GNUNET_SCHEDULER_shutdown ();
7582 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7585 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7586 validation_map = NULL;
7587 GNUNET_free (keyfile);
7590 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
7591 GNUNET_free (keyfile);
7592 if (my_private_key == NULL)
7594 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7596 ("Transport service could not access hostkey. Exiting.\n"));
7597 GNUNET_SCHEDULER_shutdown ();
7600 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7603 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7604 validation_map = NULL;
7607 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
7608 GNUNET_CRYPTO_hash (&my_public_key,
7609 sizeof (my_public_key), &my_identity.hashPubKey);
7610 /* setup notification */
7611 GNUNET_SERVER_disconnect_notify (server,
7612 &client_disconnect_notification, NULL);
7613 /* load plugins... */
7616 GNUNET_CONFIGURATION_get_value_string (c,
7617 "TRANSPORT", "PLUGINS", &plugs))
7619 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
7620 _("Starting transport plugins `%s'\n"), plugs);
7621 pos = strtok (plugs, " ");
7624 start_transport (server, pos);
7626 pos = strtok (NULL, " ");
7628 GNUNET_free (plugs);
7630 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
7631 &shutdown_task, NULL);
7638 GNUNET_log (GNUNET_ERROR_TYPE_INFO, _("Transport service ready.\n"));
7640 /* If we have a blacklist file, read from it */
7641 read_blacklist_file(cfg);
7642 /* process client requests */
7643 GNUNET_SERVER_add_handlers (server, handlers);
7648 * The main function for the transport service.
7650 * @param argc number of arguments from the command line
7651 * @param argv command line arguments
7652 * @return 0 ok, 1 on error
7655 main (int argc, char *const *argv)
7657 a2s (NULL, NULL, 0); /* make compiler happy */
7658 return (GNUNET_OK ==
7659 GNUNET_SERVICE_run (argc,
7662 GNUNET_SERVICE_OPTION_NONE,
7663 &run, NULL)) ? 0 : 1;
7666 /* end of gnunet-service-transport.c */