2 This file is part of GNUnet.
3 (C) 2009, 2010 Christian Grothoff (and other contributing authors)
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13 General Public License for more details.
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22 * @file transport/gnunet-service-transport.c
23 * @brief low-level P2P messaging
24 * @author Christian Grothoff
28 #include "gnunet_client_lib.h"
29 #include "gnunet_container_lib.h"
30 #include "gnunet_constants.h"
31 #include "gnunet_getopt_lib.h"
32 #include "gnunet_hello_lib.h"
33 #include "gnunet_os_lib.h"
34 #include "gnunet_peerinfo_service.h"
35 #include "gnunet_plugin_lib.h"
36 #include "gnunet_protocols.h"
37 #include "gnunet_service_lib.h"
38 #include "gnunet_signatures.h"
39 #include "gnunet_transport_plugin.h"
40 #include "transport.h"
45 #define DEBUG_BLACKLIST GNUNET_NO
47 #define DEBUG_PING_PONG GNUNET_NO
49 #define DEBUG_TRANSPORT_HELLO GNUNET_NO
51 #define DEBUG_ATS GNUNET_NO
53 #define VERBOSE_ATS GNUNET_NO
56 * Should we do some additional checks (to validate behavior
59 #define EXTRA_CHECKS GNUNET_YES
62 * How many messages can we have pending for a given client process
63 * before we start to drop incoming messages? We typically should
64 * have only one client and so this would be the primary buffer for
65 * messages, so the number should be chosen rather generously.
67 * The expectation here is that most of the time the queue is large
68 * enough so that a drop is virtually never required. Note that
69 * this value must be about as large as 'TOTAL_MSGS' in the
70 * 'test_transport_api_reliability.c', otherwise that testcase may
73 #define MAX_PENDING (128 * 1024)
76 * Size of the per-transport blacklist hash maps.
78 #define TRANSPORT_BLACKLIST_HT_SIZE 16
81 * How often should we try to reconnect to a peer using a particular
82 * transport plugin before giving up? Note that the plugin may be
83 * added back to the list after PLUGIN_RETRY_FREQUENCY expires.
85 #define MAX_CONNECT_RETRY 3
88 * Limit on the number of ready-to-run tasks when validating
89 * HELLOs. If more tasks are ready to run, we will drop
90 * HELLOs instead of validating them.
92 #define MAX_HELLO_LOAD 4
95 * How often must a peer violate bandwidth quotas before we start
96 * to simply drop its messages?
98 #define QUOTA_VIOLATION_DROP_THRESHOLD 10
101 * How long until a HELLO verification attempt should time out?
102 * Must be rather small, otherwise a partially successful HELLO
103 * validation (some addresses working) might not be available
104 * before a client's request for a connection fails for good.
105 * Besides, if a single request to an address takes a long time,
106 * then the peer is unlikely worthwhile anyway.
108 #define HELLO_VERIFICATION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
111 * How long is a PONG signature valid? We'll recycle a signature until
112 * 1/4 of this time is remaining. PONGs should expire so that if our
113 * external addresses change an adversary cannot replay them indefinitely.
114 * OTOH, we don't want to spend too much time generating PONG signatures,
115 * so they must have some lifetime to reduce our CPU usage.
117 #define PONG_SIGNATURE_LIFETIME GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 1)
120 * Priority to use for PONG messages.
122 #define TRANSPORT_PONG_PRIORITY 4
125 * How often do we re-add (cheaper) plugins to our list of plugins
126 * to try for a given connected peer?
128 #define PLUGIN_RETRY_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 15)
131 * After how long do we expire an address in a HELLO that we just
132 * validated? This value is also used for our own addresses when we
135 #define HELLO_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 12)
139 * How long before an existing address expires should we again try to
140 * validate it? Must be (significantly) smaller than
141 * HELLO_ADDRESS_EXPIRATION.
143 #define HELLO_REVALIDATION_START_TIME GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 1)
146 * Maximum frequency for re-evaluating latencies for all transport addresses.
148 #define LATENCY_EVALUATION_MAX_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 1)
151 * Maximum frequency for re-evaluating latencies for connected addresses.
153 #define CONNECTED_LATENCY_EVALUATION_MAX_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 1)
155 #define VERY_BIG_DOUBLE_VALUE 100000000000LL
158 #define ATS_Q_UPDATED 1
159 #define ATS_C_UPDATED 2
160 #define ATS_QC_UPDATED 3
161 #define ATS_UNMODIFIED 4
164 * List of addresses of other peers
166 struct ForeignAddressList
169 * This is a linked list.
171 struct ForeignAddressList *next;
174 * Which ready list does this entry belong to.
176 struct ReadyList *ready_list;
179 * How long until we auto-expire this address (unless it is
180 * re-confirmed by the transport)?
182 struct GNUNET_TIME_Absolute expires;
185 * Task used to re-validate addresses, updates latencies and
188 GNUNET_SCHEDULER_TaskIdentifier revalidate_task;
196 * Session (or NULL if no valid session currently exists or if the
197 * plugin does not use sessions).
199 struct Session *session;
201 struct ATS_ressource_entry * ressources;
203 struct ATS_quality_entry * quality;
206 * What was the last latency observed for this address, plugin and peer?
208 struct GNUNET_TIME_Relative latency;
211 * If we did not successfully transmit a message to the given peer
212 * via this connection during the specified time, we should consider
213 * the connection to be dead. This is used in the case that a TCP
214 * transport simply stalls writing to the stream but does not
215 * formerly get a signal that the other peer died.
217 struct GNUNET_TIME_Absolute timeout;
220 * How often have we tried to connect using this plugin? Used to
221 * discriminate against addresses that do not work well.
222 * FIXME: not yet used, but should be!
224 unsigned int connect_attempts;
227 * DV distance to this peer (1 if no DV is used).
228 * FIXME: need to set this from transport plugins!
238 * Have we ever estimated the latency of this address? Used to
239 * ensure that the first time we add an address, we immediately
245 * Are we currently connected via this address? The first time we
246 * successfully transmit or receive data to a peer via a particular
247 * address, we set this to GNUNET_YES. If we later get an error
248 * (disconnect notification, transmission failure, timeout), we set
249 * it back to GNUNET_NO.
254 * Is this plugin currently busy transmitting to the specific target?
255 * GNUNET_NO if not (initial, default state is GNUNET_NO). Internal
256 * messages do not count as 'in transmit'.
261 * Has this address been validated yet?
269 * Entry in linked list of network addresses for ourselves. Also
270 * includes a cached signature for 'struct TransportPongMessage's.
272 struct OwnAddressList
275 * This is a linked list.
277 struct OwnAddressList *next;
280 * How long until we actually auto-expire this address (unless it is
281 * re-confirmed by the transport)?
283 struct GNUNET_TIME_Absolute expires;
286 * How long until the current signature expires? (ZERO if the
287 * signature was never created).
289 struct GNUNET_TIME_Absolute pong_sig_expires;
292 * Signature for a 'struct TransportPongMessage' for this address.
294 struct GNUNET_CRYPTO_RsaSignature pong_signature;
305 * Entry in linked list of all of our plugins.
307 struct TransportPlugin
311 * This is a linked list.
313 struct TransportPlugin *next;
316 * API of the transport as returned by the plugin's
317 * initialization function.
319 struct GNUNET_TRANSPORT_PluginFunctions *api;
322 * Short name for the plugin (i.e. "tcp").
327 * Name of the library (i.e. "gnunet_plugin_transport_tcp").
332 * List of our known addresses for this transport.
334 struct OwnAddressList *addresses;
337 * Environment this transport service is using
340 struct GNUNET_TRANSPORT_PluginEnvironment env;
343 * ID of task that is used to clean up expired addresses.
345 GNUNET_SCHEDULER_TaskIdentifier address_update_task;
348 * Set to GNUNET_YES if we need to scrap the existing list of
349 * "addresses" and start fresh when we receive the next address
350 * update from a transport. Set to GNUNET_NO if we should just add
351 * the new address to the list and wait for the commit call.
355 struct ATS_plugin * rc;
358 * Hashmap of blacklisted peers for this particular transport.
360 struct GNUNET_CONTAINER_MultiHashMap *blacklist;
363 struct NeighbourList;
366 * For each neighbour we keep a list of messages
367 * that we still want to transmit to the neighbour.
373 * This is a doubly linked list.
375 struct MessageQueue *next;
378 * This is a doubly linked list.
380 struct MessageQueue *prev;
383 * The message(s) we want to transmit, GNUNET_MessageHeader(s)
384 * stuck together in memory. Allocated at the end of this struct.
386 const char *message_buf;
389 * Size of the message buf
391 size_t message_buf_size;
394 * Client responsible for queueing the message;
395 * used to check that a client has no two messages
396 * pending for the same target. Can be NULL.
398 struct TransportClient *client;
401 * Using which specific address should we send this message?
403 struct ForeignAddressList *specific_address;
406 * Peer ID of the Neighbour this entry belongs to.
408 struct GNUNET_PeerIdentity neighbour_id;
411 * Plugin that we used for the transmission.
412 * NULL until we scheduled a transmission.
414 struct TransportPlugin *plugin;
417 * At what time should we fail?
419 struct GNUNET_TIME_Absolute timeout;
422 * Internal message of the transport system that should not be
423 * included in the usual SEND-SEND_OK transmission confirmation
424 * traffic management scheme. Typically, "internal_msg" will
425 * be set whenever "client" is NULL (but it is not strictly
431 * How important is the message?
433 unsigned int priority;
439 * For a given Neighbour, which plugins are available
440 * to talk to this peer and what are their costs?
445 * This is a linked list.
447 struct ReadyList *next;
450 * Which of our transport plugins does this entry
453 struct TransportPlugin *plugin;
456 * Transport addresses, latency, and readiness for
457 * this particular plugin.
459 struct ForeignAddressList *addresses;
462 * To which neighbour does this ready list belong to?
464 struct NeighbourList *neighbour;
469 * Entry in linked list of all of our current neighbours.
475 * This is a linked list.
477 struct NeighbourList *next;
480 * Which of our transports is connected to this peer
481 * and what is their status?
483 struct ReadyList *plugins;
486 * Head of list of messages we would like to send to this peer;
487 * must contain at most one message per client.
489 struct MessageQueue *messages_head;
492 * Tail of list of messages we would like to send to this peer; must
493 * contain at most one message per client.
495 struct MessageQueue *messages_tail;
498 * Buffer for at most one payload message used when we receive
499 * payload data before our PING-PONG has succeeded. We then
500 * store such messages in this intermediary buffer until the
501 * connection is fully up.
503 struct GNUNET_MessageHeader *pre_connect_message_buffer;
506 * Context for peerinfo iteration.
507 * NULL after we are done processing peerinfo's information.
509 struct GNUNET_PEERINFO_IteratorContext *piter;
512 * Public key for this peer. Valid only if the respective flag is set below.
514 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
517 * Identity of this neighbour.
519 struct GNUNET_PeerIdentity id;
522 * ID of task scheduled to run when this peer is about to
523 * time out (will free resources associated with the peer).
525 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
528 * ID of task scheduled to run when we should retry transmitting
529 * the head of the message queue. Actually triggered when the
530 * transmission is timing out (we trigger instantly when we have
531 * a chance of success).
533 GNUNET_SCHEDULER_TaskIdentifier retry_task;
536 * How long until we should consider this peer dead
537 * (if we don't receive another message in the
540 struct GNUNET_TIME_Absolute peer_timeout;
543 * Tracker for inbound bandwidth.
545 struct GNUNET_BANDWIDTH_Tracker in_tracker;
548 * The latency we have seen for this particular address for
549 * this particular peer. This latency may have been calculated
550 * over multiple transports. This value reflects how long it took
551 * us to receive a response when SENDING via this particular
552 * transport/neighbour/address combination!
554 * FIXME: we need to periodically send PINGs to update this
555 * latency (at least more often than the current "huge" (11h?)
558 struct GNUNET_TIME_Relative latency;
561 * How often has the other peer (recently) violated the
562 * inbound traffic limit? Incremented by 10 per violation,
563 * decremented by 1 per non-violation (for each
566 unsigned int quota_violation_count;
569 * DV distance to this peer (1 if no DV is used).
574 * Have we seen an PONG from this neighbour in the past (and
575 * not had a disconnect since)?
580 * Do we have a valid public key for this neighbour?
582 int public_key_valid;
585 * Performance data for the peer.
587 struct GNUNET_TRANSPORT_ATS_Information *ats;
590 * Identity of the neighbour.
592 struct GNUNET_PeerIdentity peer;
597 * Message used to ask a peer to validate receipt (to check an address
598 * from a HELLO). Followed by the address we are trying to validate,
599 * or an empty address if we are just sending a PING to confirm that a
600 * connection which the receiver (of the PING) initiated is still valid.
602 struct TransportPingMessage
606 * Type will be GNUNET_MESSAGE_TYPE_TRANSPORT_PING
608 struct GNUNET_MessageHeader header;
611 * Challenge code (to ensure fresh reply).
613 uint32_t challenge GNUNET_PACKED;
616 * Who is the intended recipient?
618 struct GNUNET_PeerIdentity target;
624 * Message used to validate a HELLO. The challenge is included in the
625 * confirmation to make matching of replies to requests possible. The
626 * signature signs our public key, an expiration time and our address.<p>
628 * This message is followed by our transport address that the PING tried
629 * to confirm (if we liked it). The address can be empty (zero bytes)
630 * if the PING had not address either (and we received the request via
631 * a connection that we initiated).
633 struct TransportPongMessage
637 * Type will be GNUNET_MESSAGE_TYPE_TRANSPORT_PONG
639 struct GNUNET_MessageHeader header;
642 * Challenge code from PING (showing freshness). Not part of what
643 * is signed so that we can re-use signatures.
645 uint32_t challenge GNUNET_PACKED;
650 struct GNUNET_CRYPTO_RsaSignature signature;
653 * What are we signing and why? Two possible reason codes can be here:
654 * GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN to confirm that this is a
655 * plausible address for this peer (pid is set to identity of signer); or
656 * GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING to confirm that this is
657 * an address we used to connect to the peer with the given pid.
659 struct GNUNET_CRYPTO_RsaSignaturePurpose purpose;
662 * When does this signature expire?
664 struct GNUNET_TIME_AbsoluteNBO expiration;
667 * Either the identity of the peer Who signed this message, or the
668 * identity of the peer that we're connected to using the given
669 * address (depending on purpose.type).
671 struct GNUNET_PeerIdentity pid;
674 * Size of address appended to this message (part of what is
675 * being signed, hence not redundant).
683 * Linked list of messages to be transmitted to the client. Each
684 * entry is followed by the actual message.
686 struct ClientMessageQueueEntry
689 * This is a doubly-linked list.
691 struct ClientMessageQueueEntry *next;
694 * This is a doubly-linked list.
696 struct ClientMessageQueueEntry *prev;
701 * Client connected to the transport service.
703 struct TransportClient
707 * This is a linked list.
709 struct TransportClient *next;
712 * Handle to the client.
714 struct GNUNET_SERVER_Client *client;
717 * Linked list of messages yet to be transmitted to
720 struct ClientMessageQueueEntry *message_queue_head;
723 * Tail of linked list of messages yet to be transmitted to the
726 struct ClientMessageQueueEntry *message_queue_tail;
729 * Current transmit request handle.
731 struct GNUNET_CONNECTION_TransmitHandle *th;
734 * Is a call to "transmit_send_continuation" pending? If so, we
735 * must not free this struct (even if the corresponding client
736 * disconnects) and instead only remove it from the linked list and
737 * set the "client" field to NULL.
742 * Length of the list of messages pending for this client.
744 unsigned int message_count;
750 * Context of currently active requests to peerinfo
751 * for validation of HELLOs.
753 struct CheckHelloValidatedContext;
757 * Entry in map of all HELLOs awaiting validation.
759 struct ValidationEntry
763 * NULL if this entry is not part of a larger HELLO validation.
765 struct CheckHelloValidatedContext *chvc;
768 * The address, actually a pointer to the end
769 * of this struct. Do not free!
774 * Name of the transport.
776 char *transport_name;
779 * The public key of the peer.
781 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
784 * ID of task that will clean up this entry if we don't succeed
785 * with the validation first.
787 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
790 * At what time did we send this validation?
792 struct GNUNET_TIME_Absolute send_time;
795 * Session being validated (or NULL for none).
797 struct Session *session;
800 * Challenge number we used.
813 * Context of currently active requests to peerinfo
814 * for validation of HELLOs.
816 struct CheckHelloValidatedContext
820 * This is a doubly-linked list.
822 struct CheckHelloValidatedContext *next;
825 * This is a doubly-linked list.
827 struct CheckHelloValidatedContext *prev;
830 * Hello that we are validating.
832 const struct GNUNET_HELLO_Message *hello;
835 * Context for peerinfo iteration.
836 * NULL after we are done processing peerinfo's information.
838 struct GNUNET_PEERINFO_IteratorContext *piter;
841 * Was a HELLO known for this peer to peerinfo?
846 * Number of validation entries currently referring to this
849 unsigned int ve_count;
852 struct ATS_quality_metric
861 struct ATS_mechanism * prev;
862 struct ATS_mechanism * next;
863 struct ForeignAddressList * addr;
864 struct TransportPlugin * plugin;
865 struct ATS_peer * peer;
868 struct ATS_ressource_cost * rc;
874 struct GNUNET_PeerIdentity peer;
875 struct NeighbourList * n;
876 struct ATS_mechanism * m_head;
877 struct ATS_mechanism * m_tail;
879 /* preference value f */
887 * result of last GLPK run
893 * is problem currently valid and can it be solved
898 * Number of transport mechanisms in the problem
903 * Number of transport mechanisms in the problem
908 * row index where quality related rows start
913 * row index where quality related rows end
918 * row index where ressource cost related rows start
923 * row index where ressource cost related rows end
934 struct ATS_ressource_entry
936 /* index in ressources array */
938 /* depending ATSi parameter to calculcate limits */
947 /* index in ressources array */
949 /* depending ATSi parameter to calculcate limits */
951 /* cfg option to load limits */
958 /* cofficients for the specific plugins */
968 static struct ATS_ressource ressources[] =
970 /* FIXME: the coefficients for the specific plugins */
971 {1, 7, "LAN_BW_LIMIT", 0, VERY_BIG_DOUBLE_VALUE, 0, 1, 1, 2, 2, 1, 3},
972 {2, 7, "WAN_BW_LIMIT", 0, VERY_BIG_DOUBLE_VALUE, 0, 1, 1, 2, 2, 2, 3},
973 {3, 4, "WLAN_ENERGY_LIMIT", 0, VERY_BIG_DOUBLE_VALUE, 0, 0, 0, 0, 0, 2, 1}
975 {4, 4, "COST_ENERGY_CONSUMPTION", VERY_BIG_DOUBLE_VALUE},
976 {5, 5, "COST_CONNECT", VERY_BIG_DOUBLE_VALUE},
977 {6, 6, "COST_BANDWITH_AVAILABLE", VERY_BIG_DOUBLE_VALUE},
978 {7, 7, "COST_NETWORK_OVERHEAD", VERY_BIG_DOUBLE_VALUE},*/
981 static int available_ressources = 3;
989 * Time of last execution
991 struct GNUNET_TIME_Absolute last;
993 * Minimum intervall between two executions
995 struct GNUNET_TIME_Relative min_delta;
997 * Regular intervall when execution is triggered
999 struct GNUNET_TIME_Relative exec_interval;
1001 * Maximum execution time per calculation
1003 struct GNUNET_TIME_Relative max_exec_duration;
1007 * GLPK (MLP) problem object
1013 * task to recalculate the bandwidth assignment
1015 GNUNET_SCHEDULER_TaskIdentifier ats_task;
1018 * Current state of the GLPK problem
1020 struct ATS_stat stat;
1023 * mechanisms used in current problem
1024 * needed for problem modification
1026 struct ATS_mechanism * mechanisms;
1029 * peers used in current problem
1030 * needed for problem modification
1032 struct ATS_peer * peers;
1035 * Maximum number of LP iterations per calculation
1040 * Dump problem to a file?
1045 * Dump solution to a file
1050 * Dump solution when minimum peers:
1055 * Dump solution when minimum addresses:
1060 * Dump solution overwrite file:
1065 * Ressource costs or quality metrics changed
1066 * update problem before solving
1068 int modified_resources;
1071 * Ressource costs or quality metrics changed, update matrix
1072 * update problem before solving
1074 int modified_quality;
1077 * Peers have connected or disconnected
1078 * problem has to be recreated
1083 * Was the available basis invalid and we needed to rerun simplex?
1085 int simplex_rerun_required;
1103 * Minimum bandwidth per peer
1108 * Minimum number of connections per peer
1115 * Our HELLO message.
1117 static struct GNUNET_HELLO_Message *our_hello;
1122 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
1127 static struct GNUNET_PeerIdentity my_identity;
1132 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
1135 * Our configuration.
1137 const struct GNUNET_CONFIGURATION_Handle *cfg;
1140 * Linked list of all clients to this service.
1142 static struct TransportClient *clients;
1145 * All loaded plugins.
1147 static struct TransportPlugin *plugins;
1150 * Handle to peerinfo service.
1152 static struct GNUNET_PEERINFO_Handle *peerinfo;
1155 * All known neighbours and their HELLOs.
1157 static struct NeighbourList *neighbours;
1160 * Number of neighbours we'd like to have.
1162 static uint32_t max_connect_per_transport;
1165 * Head of linked list.
1167 static struct CheckHelloValidatedContext *chvc_head;
1170 * Tail of linked list.
1172 static struct CheckHelloValidatedContext *chvc_tail;
1175 * Map of PeerIdentities to 'struct ValidationEntry*'s (addresses
1176 * of the given peer that we are currently validating).
1178 static struct GNUNET_CONTAINER_MultiHashMap *validation_map;
1181 * Handle for reporting statistics.
1183 static struct GNUNET_STATISTICS_Handle *stats;
1186 * Handle for ats information
1188 static struct ATS_info *ats;
1190 struct ATS_quality_entry
1198 static struct ATS_quality_metric qm[] =
1200 {1, 1028, "QUALITY_NET_DISTANCE"},
1201 {2, 1034, "QUALITY_NET_DELAY"},
1203 static int available_quality_metrics = 2;
1207 * The peer specified by the given neighbour has timed-out or a plugin
1208 * has disconnected. We may either need to do nothing (other plugins
1209 * still up), or trigger a full disconnect and clean up. This
1210 * function updates our state and do the necessary notifications.
1211 * Also notifies our clients that the neighbour is now officially
1214 * @param n the neighbour list entry for the peer
1215 * @param check should we just check if all plugins
1216 * disconnected or must we ask all plugins to
1219 static void disconnect_neighbour (struct NeighbourList *n, int check);
1222 * Check the ready list for the given neighbour and if a plugin is
1223 * ready for transmission (and if we have a message), do so!
1225 * @param nexi target peer for which to transmit
1227 static void try_transmission_to_peer (struct NeighbourList *n);
1229 static void ats_shutdown ( );
1231 static void ats_notify_peer_connect (
1232 const struct GNUNET_PeerIdentity *peer,
1233 const struct GNUNET_TRANSPORT_ATS_Information *ats_data, int ats_count);
1235 static void ats_notify_peer_disconnect (
1236 const struct GNUNET_PeerIdentity *peer);
1239 static void ats_notify_ats_data (
1240 const struct GNUNET_PeerIdentity *peer,
1241 const struct GNUNET_TRANSPORT_ATS_Information *ats_data);
1244 struct ForeignAddressList * ats_get_preferred_address (
1245 struct NeighbourList *n);
1248 ats_calculate_bandwidth_distribution ();
1251 * Find an entry in the neighbour list for a particular peer.
1253 * @return NULL if not found.
1255 static struct NeighbourList *
1256 find_neighbour (const struct GNUNET_PeerIdentity *key)
1258 struct NeighbourList *head = neighbours;
1260 while ((head != NULL) &&
1261 (0 != memcmp (key, &head->id, sizeof (struct GNUNET_PeerIdentity))))
1266 static int update_addr_value (struct ForeignAddressList *fal, uint32_t value , int ats_index)
1269 int set = GNUNET_NO;
1270 for (c=0; c<available_quality_metrics; c++)
1272 if (ats_index == qm[c].atis_index)
1274 fal->quality[c].values[0] = fal->quality[c].values[1];
1275 fal->quality[c].values[1] = fal->quality[c].values[2];
1276 fal->quality[c].values[2] = value;
1278 ats->modified_quality = GNUNET_YES;
1281 if (set == GNUNET_NO)
1283 for (c=0; c<available_ressources; c++)
1285 if (ats_index == ressources[c].atis_index)
1287 fal->ressources[c].c = value;
1289 ats->modified_resources = GNUNET_YES;
1297 static int update_addr_ats (struct ForeignAddressList *fal, const struct GNUNET_TRANSPORT_ATS_Information *ats_data, int ats_count)
1301 for (c1=0; c1<ats_count; c1++)
1303 set = update_addr_value(fal, ntohl(ats_data[c1].value), ntohl(ats_data[c1].type));
1309 * Find an entry in the transport list for a particular transport.
1311 * @return NULL if not found.
1313 static struct TransportPlugin *
1314 find_transport (const char *short_name)
1316 struct TransportPlugin *head = plugins;
1317 while ((head != NULL) && (0 != strcmp (short_name, head->short_name)))
1323 * Is a particular peer blacklisted for a particular transport?
1325 * @param peer the peer to check for
1326 * @param plugin the plugin used to connect to the peer
1328 * @return GNUNET_YES if the peer is blacklisted, GNUNET_NO if not
1331 is_blacklisted (const struct GNUNET_PeerIdentity *peer, struct TransportPlugin *plugin)
1334 if (plugin->blacklist != NULL)
1336 if (GNUNET_CONTAINER_multihashmap_contains (plugin->blacklist, &peer->hashPubKey) == GNUNET_YES)
1339 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1340 "Peer `%s:%s' is blacklisted!\n",
1341 plugin->short_name, GNUNET_i2s (peer));
1344 GNUNET_STATISTICS_update (stats, "# blacklisted peers refused", 1, GNUNET_NO);
1354 add_peer_to_blacklist (struct GNUNET_PeerIdentity *peer, char *transport_name)
1356 struct TransportPlugin *plugin;
1358 plugin = find_transport(transport_name);
1359 if (plugin == NULL) /* Nothing to do */
1361 if (plugin->blacklist == NULL)
1362 plugin->blacklist = GNUNET_CONTAINER_multihashmap_create(TRANSPORT_BLACKLIST_HT_SIZE);
1363 GNUNET_assert(plugin->blacklist != NULL);
1364 GNUNET_CONTAINER_multihashmap_put(plugin->blacklist, &peer->hashPubKey,
1366 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1371 * Read the blacklist file, containing transport:peer entries.
1372 * Provided the transport is loaded, set up hashmap with these
1373 * entries to blacklist peers by transport.
1377 read_blacklist_file (const struct GNUNET_CONFIGURATION_Handle *cfg)
1384 struct GNUNET_PeerIdentity pid;
1386 struct GNUNET_CRYPTO_HashAsciiEncoded enc;
1387 unsigned int entries_found;
1388 char *transport_name;
1391 GNUNET_CONFIGURATION_get_value_filename (cfg,
1397 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1398 "Option `%s' in section `%s' not specified!\n",
1404 if (GNUNET_OK != GNUNET_DISK_file_test (fn))
1405 GNUNET_DISK_fn_write (fn, NULL, 0, GNUNET_DISK_PERM_USER_READ
1406 | GNUNET_DISK_PERM_USER_WRITE);
1407 if (0 != STAT (fn, &frstat))
1409 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1410 _("Could not read blacklist file `%s'\n"), fn);
1414 if (frstat.st_size == 0)
1417 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1418 _("Blacklist file `%s' is empty.\n"),
1424 /* FIXME: use mmap */
1425 data = GNUNET_malloc_large (frstat.st_size);
1426 GNUNET_assert(data != NULL);
1427 if (frstat.st_size !=
1428 GNUNET_DISK_fn_read (fn, data, frstat.st_size))
1430 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1431 _("Failed to read blacklist from `%s'\n"), fn);
1438 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1440 while ((frstat.st_size >= sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded)) &&
1441 (pos <= frstat.st_size - sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded)))
1444 while ((colon_pos < frstat.st_size) && (data[colon_pos] != ':') && !isspace ( (unsigned char) data[colon_pos]))
1447 if (colon_pos >= frstat.st_size)
1449 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1450 _("Syntax error in blacklist file at offset %llu, giving up!\n"),
1451 (unsigned long long) colon_pos);
1457 if (isspace( (unsigned char) data[colon_pos]))
1459 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1460 _("Syntax error in blacklist file at offset %llu, skipping bytes.\n"),
1461 (unsigned long long) colon_pos);
1463 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1467 tsize = colon_pos - pos;
1468 if ((pos >= frstat.st_size) || (pos + tsize >= frstat.st_size) || (tsize == 0))
1470 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1471 _("Syntax error in blacklist file at offset %llu, giving up!\n"),
1472 (unsigned long long) colon_pos);
1481 transport_name = GNUNET_malloc(tsize + 1);
1482 memcpy(transport_name, &data[pos], tsize);
1483 pos = colon_pos + 1;
1485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1486 "Read transport name %s in blacklist file.\n",
1489 memcpy (&enc, &data[pos], sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded));
1490 if (!isspace ( (unsigned char) enc.encoding[sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded) - 1]))
1492 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1493 _("Syntax error in blacklist file at offset %llu, skipping bytes.\n"),
1494 (unsigned long long) pos);
1496 while ((pos < frstat.st_size) && (!isspace ( (unsigned char) data[pos])))
1498 GNUNET_free_non_null(transport_name);
1501 enc.encoding[sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded) - 1] = '\0';
1502 if (GNUNET_OK != GNUNET_CRYPTO_hash_from_string ((char *) &enc, &pid.hashPubKey))
1504 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1505 _("Syntax error in blacklist file at offset %llu, skipping bytes `%s'.\n"),
1506 (unsigned long long) pos,
1511 if (0 != memcmp (&pid,
1513 sizeof (struct GNUNET_PeerIdentity)))
1516 add_peer_to_blacklist (&pid,
1521 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1522 _("Found myself `%s' in blacklist (useless, ignored)\n"),
1526 pos = pos + sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded);
1527 GNUNET_free_non_null(transport_name);
1528 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1531 GNUNET_STATISTICS_update (stats, "# Transport entries blacklisted", entries_found, GNUNET_NO);
1538 * Function called to notify a client about the socket being ready to
1539 * queue more data. "buf" will be NULL and "size" zero if the socket
1540 * was closed for writing in the meantime.
1542 * @param cls closure
1543 * @param size number of bytes available in buf
1544 * @param buf where the callee should write the message
1545 * @return number of bytes written to buf
1548 transmit_to_client_callback (void *cls, size_t size, void *buf)
1550 struct TransportClient *client = cls;
1551 struct ClientMessageQueueEntry *q;
1554 const struct GNUNET_MessageHeader *msg;
1561 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1562 "Transmission to client failed, closing connection.\n");
1564 /* fatal error with client, free message queue! */
1565 while (NULL != (q = client->message_queue_head))
1567 GNUNET_STATISTICS_update (stats,
1568 gettext_noop ("# bytes discarded (could not transmit to client)"),
1569 ntohs (((const struct GNUNET_MessageHeader*)&q[1])->size),
1571 GNUNET_CONTAINER_DLL_remove (client->message_queue_head,
1572 client->message_queue_tail,
1576 client->message_count = 0;
1581 while (NULL != (q = client->message_queue_head))
1583 msg = (const struct GNUNET_MessageHeader *) &q[1];
1584 msize = ntohs (msg->size);
1585 if (msize + tsize > size)
1588 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1589 "Transmitting message of type %u to client.\n",
1592 GNUNET_CONTAINER_DLL_remove (client->message_queue_head,
1593 client->message_queue_tail,
1595 memcpy (&cbuf[tsize], msg, msize);
1598 client->message_count--;
1602 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
1603 client->th = GNUNET_SERVER_notify_transmit_ready (client->client,
1605 GNUNET_TIME_UNIT_FOREVER_REL,
1606 &transmit_to_client_callback,
1608 GNUNET_assert (client->th != NULL);
1615 * Convert an address to a string.
1617 * @param plugin name of the plugin responsible for the address
1618 * @param addr binary address
1619 * @param addr_len number of bytes in addr
1620 * @return NULL on error, otherwise address string
1623 a2s (const char *plugin,
1627 struct TransportPlugin *p;
1631 p = find_transport (plugin);
1634 return p->api->address_to_string (p->api->cls,
1641 * Mark the given FAL entry as 'connected' (and hence preferred for
1642 * sending); also mark all others for the same peer as 'not connected'
1643 * (since only one can be preferred).
1645 * @param fal address to set to 'connected'
1648 mark_address_connected (struct ForeignAddressList *fal)
1650 struct ForeignAddressList *pos;
1653 GNUNET_assert (GNUNET_YES == fal->validated);
1654 if (fal->connected == GNUNET_YES)
1655 return; /* nothing to do */
1657 pos = fal->ready_list->addresses;
1660 if (GNUNET_YES == pos->connected)
1663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1664 "Marking address `%s' as no longer connected (due to connect on other address)\n",
1665 a2s (pos->ready_list->plugin->short_name,
1669 GNUNET_break (cnt == GNUNET_YES);
1671 pos->connected = GNUNET_NO;
1672 GNUNET_STATISTICS_update (stats,
1673 gettext_noop ("# connected addresses"),
1679 fal->connected = GNUNET_YES;
1680 if (GNUNET_YES == cnt)
1682 GNUNET_STATISTICS_update (stats,
1683 gettext_noop ("# connected addresses"),
1691 * Send the specified message to the specified client. Since multiple
1692 * messages may be pending for the same client at a time, this code
1693 * makes sure that no message is lost.
1695 * @param client client to transmit the message to
1696 * @param msg the message to send
1697 * @param may_drop can this message be dropped if the
1698 * message queue for this client is getting far too large?
1701 transmit_to_client (struct TransportClient *client,
1702 const struct GNUNET_MessageHeader *msg, int may_drop)
1704 struct ClientMessageQueueEntry *q;
1707 if ((client->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
1709 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1711 ("Dropping message of type %u and size %u, have %u messages pending (%u is the soft limit)\n"),
1714 client->message_count,
1716 GNUNET_STATISTICS_update (stats,
1717 gettext_noop ("# messages dropped due to slow client"),
1722 msize = ntohs (msg->size);
1723 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
1724 q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
1725 memcpy (&q[1], msg, msize);
1726 GNUNET_CONTAINER_DLL_insert_after (client->message_queue_head,
1727 client->message_queue_tail,
1728 client->message_queue_tail,
1730 client->message_count++;
1731 if (client->th == NULL)
1733 client->th = GNUNET_SERVER_notify_transmit_ready (client->client,
1735 GNUNET_TIME_UNIT_FOREVER_REL,
1736 &transmit_to_client_callback,
1738 GNUNET_assert (client->th != NULL);
1744 * Transmit a 'SEND_OK' notification to the given client for the
1747 * @param client who to notify
1748 * @param n neighbour to notify about, can be NULL (on failure)
1749 * @param target target of the transmission
1750 * @param result status code for the transmission request
1753 transmit_send_ok (struct TransportClient *client,
1754 struct NeighbourList *n,
1755 const struct GNUNET_PeerIdentity *target,
1758 struct SendOkMessage send_ok_msg;
1760 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
1761 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
1762 send_ok_msg.success = htonl (result);
1764 send_ok_msg.latency = GNUNET_TIME_relative_hton (n->latency);
1766 send_ok_msg.latency = GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
1767 send_ok_msg.peer = *target;
1768 transmit_to_client (client, &send_ok_msg.header, GNUNET_NO);
1773 * Function called by the GNUNET_TRANSPORT_TransmitFunction
1774 * upon "completion" of a send request. This tells the API
1775 * that it is now legal to send another message to the given
1778 * @param cls closure, identifies the entry on the
1779 * message queue that was transmitted and the
1780 * client responsible for queuing the message
1781 * @param target the peer receiving the message
1782 * @param result GNUNET_OK on success, if the transmission
1783 * failed, we should not tell the client to transmit
1787 transmit_send_continuation (void *cls,
1788 const struct GNUNET_PeerIdentity *target,
1791 struct MessageQueue *mq = cls;
1792 struct NeighbourList *n;
1794 GNUNET_STATISTICS_update (stats,
1795 gettext_noop ("# bytes pending with plugins"),
1796 - (int64_t) mq->message_buf_size,
1798 if (result == GNUNET_OK)
1800 GNUNET_STATISTICS_update (stats,
1801 gettext_noop ("# bytes successfully transmitted by plugins"),
1802 mq->message_buf_size,
1807 GNUNET_STATISTICS_update (stats,
1808 gettext_noop ("# bytes with transmission failure by plugins"),
1809 mq->message_buf_size,
1812 if (mq->specific_address != NULL)
1814 if (result == GNUNET_OK)
1816 mq->specific_address->timeout =
1817 GNUNET_TIME_relative_to_absolute
1818 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
1819 if (mq->specific_address->validated == GNUNET_YES)
1820 mark_address_connected (mq->specific_address);
1824 if (mq->specific_address->connected != GNUNET_NO)
1827 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1828 "Marking address `%s' as no longer connected (due to transmission problem)\n",
1829 a2s (mq->specific_address->ready_list->plugin->short_name,
1830 mq->specific_address->addr,
1831 mq->specific_address->addrlen));
1833 GNUNET_STATISTICS_update (stats,
1834 gettext_noop ("# connected addresses"),
1837 mq->specific_address->connected = GNUNET_NO;
1840 if (! mq->internal_msg)
1841 mq->specific_address->in_transmit = GNUNET_NO;
1843 n = find_neighbour(&mq->neighbour_id);
1844 if (mq->client != NULL)
1845 transmit_send_ok (mq->client, n, target, result);
1848 try_transmission_to_peer (n);
1853 * Find an address in any of the available transports for
1854 * the given neighbour that would be good for message
1855 * transmission. This is essentially the transport selection
1858 * @param neighbour for whom to select an address
1859 * @return selected address, NULL if we have none
1861 struct ForeignAddressList *
1862 find_ready_address(struct NeighbourList *neighbour)
1864 struct ReadyList *head = neighbour->plugins;
1865 struct ForeignAddressList *addresses;
1866 struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
1867 struct ForeignAddressList *best_address;
1869 /* Hack to prefer unix domain sockets */
1870 struct ForeignAddressList *unix_address = NULL;
1872 best_address = NULL;
1873 while (head != NULL)
1875 addresses = head->addresses;
1876 while (addresses != NULL)
1878 if ( (addresses->timeout.abs_value < now.abs_value) &&
1879 (addresses->connected == GNUNET_YES) )
1882 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1883 "Marking long-time inactive connection to `%4s' as down.\n",
1884 GNUNET_i2s (&neighbour->id));
1886 GNUNET_STATISTICS_update (stats,
1887 gettext_noop ("# connected addresses"),
1890 addresses->connected = GNUNET_NO;
1892 addresses = addresses->next;
1895 addresses = head->addresses;
1896 while (addresses != NULL)
1898 #if DEBUG_TRANSPORT > 1
1899 if (addresses->addr != NULL)
1900 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1901 "Have address `%s' for peer `%4s' (status: %d, %d, %d, %u, %llums, %u)\n",
1902 a2s (head->plugin->short_name,
1904 addresses->addrlen),
1905 GNUNET_i2s (&neighbour->id),
1906 addresses->connected,
1907 addresses->in_transmit,
1908 addresses->validated,
1909 addresses->connect_attempts,
1910 (unsigned long long) addresses->timeout.abs_value,
1911 (unsigned int) addresses->distance);
1913 if (0==strcmp(head->plugin->short_name,"unix"))
1915 if ((unix_address == NULL) || ((unix_address != NULL) &&
1916 (addresses->latency.rel_value < unix_address->latency.rel_value)))
1917 unix_address = addresses;
1919 if ( ( (best_address == NULL) ||
1920 (addresses->connected == GNUNET_YES) ||
1921 (best_address->connected == GNUNET_NO) ) &&
1922 (addresses->in_transmit == GNUNET_NO) &&
1923 ( (best_address == NULL) ||
1924 (addresses->latency.rel_value < best_address->latency.rel_value)) )
1925 best_address = addresses;
1926 /* FIXME: also give lower-latency addresses that are not
1927 connected a chance some times... */
1928 addresses = addresses->next;
1930 if (unix_address != NULL)
1934 if (unix_address != NULL)
1936 best_address = unix_address;
1938 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found unix address, forced this address\n");
1941 if (best_address != NULL)
1945 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1946 "Best address found (`%s') has latency of %llu ms.\n",
1947 (best_address->addrlen > 0)
1948 ? a2s (best_address->ready_list->plugin->short_name,
1950 best_address->addrlen)
1952 best_address->latency.rel_value);
1957 GNUNET_STATISTICS_update (stats,
1958 gettext_noop ("# transmission attempts failed (no address)"),
1963 return best_address;
1969 * We should re-try transmitting to the given peer,
1970 * hopefully we've learned something in the meantime.
1973 retry_transmission_task (void *cls,
1974 const struct GNUNET_SCHEDULER_TaskContext *tc)
1976 struct NeighbourList *n = cls;
1978 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
1979 try_transmission_to_peer (n);
1984 * Check the ready list for the given neighbour and if a plugin is
1985 * ready for transmission (and if we have a message), do so!
1987 * @param neighbour target peer for which to transmit
1990 try_transmission_to_peer (struct NeighbourList *n)
1992 struct ReadyList *rl;
1993 struct MessageQueue *mq;
1994 struct GNUNET_TIME_Relative timeout;
1998 if (n->messages_head == NULL)
2001 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2002 "Transmission queue for `%4s' is empty\n",
2003 GNUNET_i2s (&n->id));
2005 return; /* nothing to do */
2008 mq = n->messages_head;
2009 force_address = GNUNET_YES;
2010 if (mq->specific_address == NULL)
2013 mq->specific_address = ats_get_preferred_address(n);
2014 GNUNET_STATISTICS_update (stats,
2015 gettext_noop ("# transport selected peer address freely"),
2018 force_address = GNUNET_NO;
2020 if (mq->specific_address == NULL)
2022 GNUNET_STATISTICS_update (stats,
2023 gettext_noop ("# transport failed to selected peer address"),
2026 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
2027 if (timeout.rel_value == 0)
2030 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2031 "No destination address available to transmit message of size %u to peer `%4s'\n",
2032 mq->message_buf_size,
2033 GNUNET_i2s (&mq->neighbour_id));
2035 GNUNET_STATISTICS_update (stats,
2036 gettext_noop ("# bytes in message queue for other peers"),
2037 - (int64_t) mq->message_buf_size,
2039 GNUNET_STATISTICS_update (stats,
2040 gettext_noop ("# bytes discarded (no destination address available)"),
2041 mq->message_buf_size,
2043 if (mq->client != NULL)
2044 transmit_send_ok (mq->client, n, &n->id, GNUNET_NO);
2045 GNUNET_CONTAINER_DLL_remove (n->messages_head,
2049 return; /* nobody ready */
2051 GNUNET_STATISTICS_update (stats,
2052 gettext_noop ("# message delivery deferred (no address)"),
2055 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
2056 GNUNET_SCHEDULER_cancel (n->retry_task);
2057 n->retry_task = GNUNET_SCHEDULER_add_delayed (timeout,
2058 &retry_transmission_task,
2061 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2062 "No validated destination address available to transmit message of size %u to peer `%4s', will wait %llums to find an address.\n",
2063 mq->message_buf_size,
2064 GNUNET_i2s (&mq->neighbour_id),
2067 /* FIXME: might want to trigger peerinfo lookup here
2068 (unless that's already pending...) */
2071 GNUNET_CONTAINER_DLL_remove (n->messages_head,
2074 if (mq->specific_address->connected == GNUNET_NO)
2075 mq->specific_address->connect_attempts++;
2076 rl = mq->specific_address->ready_list;
2077 mq->plugin = rl->plugin;
2078 if (!mq->internal_msg)
2079 mq->specific_address->in_transmit = GNUNET_YES;
2081 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2082 "Sending message of size %u for `%4s' to `%s' via plugin `%s'\n",
2083 mq->message_buf_size,
2084 GNUNET_i2s (&n->id),
2085 (mq->specific_address->addr != NULL)
2086 ? a2s (mq->plugin->short_name,
2087 mq->specific_address->addr,
2088 mq->specific_address->addrlen)
2090 rl->plugin->short_name);
2092 GNUNET_STATISTICS_update (stats,
2093 gettext_noop ("# bytes in message queue for other peers"),
2094 - (int64_t) mq->message_buf_size,
2096 GNUNET_STATISTICS_update (stats,
2097 gettext_noop ("# bytes pending with plugins"),
2098 mq->message_buf_size,
2100 ret = rl->plugin->api->send (rl->plugin->api->cls,
2103 mq->message_buf_size,
2105 GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
2106 mq->specific_address->session,
2107 mq->specific_address->addr,
2108 mq->specific_address->addrlen,
2110 &transmit_send_continuation, mq);
2113 /* failure, but 'send' would not call continuation in this case,
2114 so we need to do it here! */
2115 transmit_send_continuation (mq,
2123 * Send the specified message to the specified peer.
2125 * @param client source of the transmission request (can be NULL)
2126 * @param peer_address ForeignAddressList where we should send this message
2127 * @param priority how important is the message
2128 * @param timeout how long do we have to transmit?
2129 * @param message_buf message(s) to send GNUNET_MessageHeader(s)
2130 * @param message_buf_size total size of all messages in message_buf
2131 * @param is_internal is this an internal message; these are pre-pended and
2132 * also do not count for plugins being "ready" to transmit
2133 * @param neighbour handle to the neighbour for transmission
2136 transmit_to_peer (struct TransportClient *client,
2137 struct ForeignAddressList *peer_address,
2138 unsigned int priority,
2139 struct GNUNET_TIME_Relative timeout,
2140 const char *message_buf,
2141 size_t message_buf_size,
2142 int is_internal, struct NeighbourList *neighbour)
2144 struct MessageQueue *mq;
2149 /* check for duplicate submission */
2150 mq = neighbour->messages_head;
2153 if (mq->client == client)
2155 /* client transmitted to same peer twice
2156 before getting SEND_OK! */
2164 GNUNET_STATISTICS_update (stats,
2165 gettext_noop ("# bytes in message queue for other peers"),
2168 mq = GNUNET_malloc (sizeof (struct MessageQueue) + message_buf_size);
2169 mq->specific_address = peer_address;
2170 mq->client = client;
2171 /* FIXME: this memcpy can be up to 7% of our total runtime! */
2172 memcpy (&mq[1], message_buf, message_buf_size);
2173 mq->message_buf = (const char*) &mq[1];
2174 mq->message_buf_size = message_buf_size;
2175 memcpy(&mq->neighbour_id, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
2176 mq->internal_msg = is_internal;
2177 mq->priority = priority;
2178 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
2180 GNUNET_CONTAINER_DLL_insert (neighbour->messages_head,
2181 neighbour->messages_tail,
2184 GNUNET_CONTAINER_DLL_insert_after (neighbour->messages_head,
2185 neighbour->messages_tail,
2186 neighbour->messages_tail,
2188 try_transmission_to_peer (neighbour);
2195 struct GeneratorContext
2197 struct TransportPlugin *plug_pos;
2198 struct OwnAddressList *addr_pos;
2199 struct GNUNET_TIME_Absolute expiration;
2207 address_generator (void *cls, size_t max, void *buf)
2209 struct GeneratorContext *gc = cls;
2212 while ((gc->addr_pos == NULL) && (gc->plug_pos != NULL))
2214 gc->plug_pos = gc->plug_pos->next;
2215 gc->addr_pos = (gc->plug_pos != NULL) ? gc->plug_pos->addresses : NULL;
2217 if (NULL == gc->plug_pos)
2222 ret = GNUNET_HELLO_add_address (gc->plug_pos->short_name,
2225 gc->addr_pos->addrlen, buf, max);
2226 gc->addr_pos = gc->addr_pos->next;
2232 * Construct our HELLO message from all of the addresses of
2233 * all of the transports.
2238 struct GNUNET_HELLO_Message *hello;
2239 struct TransportClient *cpos;
2240 struct NeighbourList *npos;
2241 struct GeneratorContext gc;
2243 gc.plug_pos = plugins;
2244 gc.addr_pos = plugins != NULL ? plugins->addresses : NULL;
2245 gc.expiration = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
2246 hello = GNUNET_HELLO_create (&my_public_key, &address_generator, &gc);
2248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2249 "Refreshed my `%s', new size is %d\n", "HELLO", GNUNET_HELLO_size(hello));
2251 GNUNET_STATISTICS_update (stats,
2252 gettext_noop ("# refreshed my HELLO"),
2256 while (cpos != NULL)
2258 transmit_to_client (cpos,
2259 (const struct GNUNET_MessageHeader *) hello,
2264 GNUNET_free_non_null (our_hello);
2266 GNUNET_PEERINFO_add_peer (peerinfo, our_hello);
2268 while (npos != NULL)
2271 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2272 "Transmitting updated `%s' to neighbour `%4s'\n",
2273 "HELLO", GNUNET_i2s (&npos->id));
2275 GNUNET_STATISTICS_update (stats,
2276 gettext_noop ("# transmitted my HELLO to other peers"),
2279 transmit_to_peer (NULL, NULL, 0,
2280 HELLO_ADDRESS_EXPIRATION,
2281 (const char *) our_hello,
2282 GNUNET_HELLO_size(our_hello),
2290 * Task used to clean up expired addresses for a plugin.
2292 * @param cls closure
2296 expire_address_task (void *cls,
2297 const struct GNUNET_SCHEDULER_TaskContext *tc);
2301 * Update the list of addresses for this plugin,
2302 * expiring those that are past their expiration date.
2304 * @param plugin addresses of which plugin should be recomputed?
2305 * @param fresh set to GNUNET_YES if a new address was added
2306 * and we need to regenerate the HELLO even if nobody
2310 update_addresses (struct TransportPlugin *plugin,
2313 static struct GNUNET_TIME_Absolute last_update;
2314 struct GNUNET_TIME_Relative min_remaining;
2315 struct GNUNET_TIME_Relative remaining;
2316 struct GNUNET_TIME_Absolute now;
2317 struct OwnAddressList *pos;
2318 struct OwnAddressList *prev;
2319 struct OwnAddressList *next;
2322 if (plugin->address_update_task != GNUNET_SCHEDULER_NO_TASK)
2323 GNUNET_SCHEDULER_cancel (plugin->address_update_task);
2324 plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
2325 now = GNUNET_TIME_absolute_get ();
2326 min_remaining = GNUNET_TIME_UNIT_FOREVER_REL;
2327 expired = (GNUNET_TIME_absolute_get_duration (last_update).rel_value > (HELLO_ADDRESS_EXPIRATION.rel_value / 4));
2329 pos = plugin->addresses;
2333 if (pos->expires.abs_value < now.abs_value)
2335 expired = GNUNET_YES;
2337 plugin->addresses = pos->next;
2339 prev->next = pos->next;
2344 remaining = GNUNET_TIME_absolute_get_remaining (pos->expires);
2345 if (remaining.rel_value < min_remaining.rel_value)
2346 min_remaining = remaining;
2352 if (expired || fresh)
2357 min_remaining = GNUNET_TIME_relative_min (min_remaining,
2358 GNUNET_TIME_relative_divide (HELLO_ADDRESS_EXPIRATION,
2360 plugin->address_update_task
2361 = GNUNET_SCHEDULER_add_delayed (min_remaining,
2362 &expire_address_task, plugin);
2367 * Task used to clean up expired addresses for a plugin.
2369 * @param cls closure
2373 expire_address_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2375 struct TransportPlugin *plugin = cls;
2377 plugin->address_update_task = GNUNET_SCHEDULER_NO_TASK;
2378 if (0 == (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2379 update_addresses (plugin, GNUNET_NO);
2384 * Iterator over hash map entries that NULLs the session of validation
2385 * entries that match the given session.
2387 * @param cls closure (the 'struct Session*' to match against)
2388 * @param key current key code (peer ID, not used)
2389 * @param value value in the hash map ('struct ValidationEntry*')
2390 * @return GNUNET_YES (we should continue to iterate)
2393 remove_session_validations (void *cls,
2394 const GNUNET_HashCode * key,
2397 struct Session *session = cls;
2398 struct ValidationEntry *ve = value;
2400 if (session == ve->session)
2407 * We've been disconnected from the other peer (for some
2408 * connection-oriented transport). Either quickly
2409 * re-establish the connection or signal the disconnect
2412 * Only signal CORE level disconnect if ALL addresses
2413 * for the peer are exhausted.
2415 * @param p overall plugin context
2416 * @param nl neighbour that was disconnected
2419 try_fast_reconnect (struct TransportPlugin *p,
2420 struct NeighbourList *nl)
2422 /* FIXME-MW: fast reconnect / transport switching not implemented... */
2423 /* Note: the idea here is to hide problems with transports (or
2424 switching between plugins) from the core to eliminate the need to
2425 re-negotiate session keys and the like; OTOH, we should tell core
2426 quickly (much faster than timeout) `if a connection was lost and
2427 could not be re-established (i.e. other peer went down or is
2428 unable / refuses to communicate);
2430 So we should consider:
2431 1) ideally: our own willingness / need to connect
2432 2) prior failures to connect to this peer (by plugin)
2433 3) ideally: reasons why other peer terminated (as far as knowable)
2435 Most importantly, it must be POSSIBLE for another peer to terminate
2436 a connection for a while (without us instantly re-establishing it).
2437 Similarly, if another peer is gone we should quickly notify CORE.
2438 OTOH, if there was a minor glitch (i.e. crash of gnunet-service-transport
2439 on the other end), we should reconnect in such a way that BOTH CORE
2440 services never even notice.
2441 Furthermore, the same mechanism (or small variation) could be used
2442 to switch to a better-performing plugin (ATS).
2444 Finally, this needs to be tested throughly... */
2447 * GNUNET_NO in the call below makes transport disconnect the peer,
2448 * even if only a single address (out of say, six) went away. This
2449 * function must be careful to ONLY disconnect if the peer is gone,
2450 * not just a specifi address.
2452 * More specifically, half the places it was used had it WRONG.
2455 /* No reconnect, signal disconnect instead! */
2456 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2457 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&nl->id),
2458 "try_fast_reconnect");
2459 disconnect_neighbour (nl, GNUNET_YES);
2464 * Function that will be called whenever the plugin internally
2465 * cleans up a session pointer and hence the service needs to
2466 * discard all of those sessions as well. Plugins that do not
2467 * use sessions can simply omit calling this function and always
2468 * use NULL wherever a session pointer is needed.
2470 * @param cls closure
2471 * @param peer which peer was the session for
2472 * @param session which session is being destoyed
2475 plugin_env_session_end (void *cls,
2476 const struct GNUNET_PeerIdentity *peer,
2477 struct Session *session)
2479 struct TransportPlugin *p = cls;
2480 struct NeighbourList *nl;
2481 struct ReadyList *rl;
2482 struct ForeignAddressList *pos;
2483 struct ForeignAddressList *prev;
2485 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
2486 &remove_session_validations,
2488 nl = find_neighbour (peer);
2490 return; /* was never marked as connected */
2494 if (rl->plugin == p)
2499 return; /* was never marked as connected */
2501 pos = rl->addresses;
2502 while ( (pos != NULL) &&
2503 (pos->session != session) )
2509 return; /* was never marked as connected */
2510 pos->session = NULL;
2511 if (pos->addrlen != 0)
2513 if (nl->received_pong != GNUNET_NO)
2514 try_fast_reconnect (p, nl);
2517 /* was inbound connection, free 'pos' */
2519 rl->addresses = pos->next;
2521 prev->next = pos->next;
2522 if (GNUNET_SCHEDULER_NO_TASK != pos->revalidate_task)
2524 GNUNET_SCHEDULER_cancel (pos->revalidate_task);
2525 pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
2527 GNUNET_free_non_null(pos->ressources);
2528 GNUNET_free_non_null(pos->quality);
2530 if (nl->received_pong == GNUNET_NO)
2531 return; /* nothing to do, never connected... */
2532 /* check if we have any validated addresses left */
2533 pos = rl->addresses;
2538 try_fast_reconnect (p, nl);
2543 /* no valid addresses left, signal disconnect! */
2545 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2546 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&nl->id),
2547 "plugin_env_session_end");
2548 /* FIXME: This doesn't mean there are no addresses left for this PEER,
2549 * it means there aren't any left for this PLUGIN/PEER combination! So
2550 * calling disconnect_neighbor here with GNUNET_NO forces disconnect
2551 * when it isn't necessary. Using GNUNET_YES at least checks to see
2552 * if there are any addresses that work first, so as not to overdo it.
2555 disconnect_neighbour (nl, GNUNET_YES);
2560 * Function that must be called by each plugin to notify the
2561 * transport service about the addresses under which the transport
2562 * provided by the plugin can be reached.
2564 * @param cls closure
2565 * @param name name of the transport that generated the address
2566 * @param addr one of the addresses of the host, NULL for the last address
2567 * the specific address format depends on the transport
2568 * @param addrlen length of the address
2569 * @param expires when should this address automatically expire?
2572 plugin_env_notify_address (void *cls,
2576 struct GNUNET_TIME_Relative expires)
2578 struct TransportPlugin *p = cls;
2579 struct OwnAddressList *al;
2580 struct GNUNET_TIME_Absolute abex;
2582 GNUNET_assert (addr != NULL);
2583 abex = GNUNET_TIME_relative_to_absolute (expires);
2584 GNUNET_assert (p == find_transport (name));
2588 if ( (addrlen == al->addrlen) &&
2589 (0 == memcmp (addr, &al[1], addrlen)) )
2592 update_addresses (p, GNUNET_NO);
2597 al = GNUNET_malloc (sizeof (struct OwnAddressList) + addrlen);
2598 al->next = p->addresses;
2601 al->addrlen = addrlen;
2602 memcpy (&al[1], addr, addrlen);
2603 update_addresses (p, GNUNET_YES);
2608 * Notify all of our clients about a peer connecting.
2611 notify_clients_connect (const struct GNUNET_PeerIdentity *peer,
2612 struct GNUNET_TIME_Relative latency,
2615 struct ConnectInfoMessage * cim;
2616 struct TransportClient *cpos;
2621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2622 "Notifying clients about connection from `%s'\n",
2625 GNUNET_STATISTICS_update (stats,
2626 gettext_noop ("# peers connected"),
2631 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
2632 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
2636 cim = GNUNET_malloc (size);
2638 cim->header.size = htons (size);
2639 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
2640 cim->ats_count = htonl(2);
2641 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
2642 (&(cim->ats))[0].value = htonl (distance);
2643 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
2644 (&(cim->ats))[1].value = htonl ((uint32_t) latency.rel_value);
2645 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
2646 (&(cim->ats))[2].value = htonl (0);
2647 memcpy (&cim->id, peer, sizeof (struct GNUNET_PeerIdentity));
2649 /* notify ats about connecting peer */
2650 ats_notify_peer_connect (peer, &(cim->ats), 2);
2653 while (cpos != NULL)
2655 transmit_to_client (cpos, &(cim->header), GNUNET_NO);
2664 * Notify all of our clients about a peer disconnecting.
2667 notify_clients_disconnect (const struct GNUNET_PeerIdentity *peer)
2669 struct DisconnectInfoMessage dim;
2670 struct TransportClient *cpos;
2673 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2674 "Notifying clients about lost connection to `%s'\n",
2677 GNUNET_STATISTICS_update (stats,
2678 gettext_noop ("# peers connected"),
2681 dim.header.size = htons (sizeof (struct DisconnectInfoMessage));
2682 dim.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
2683 dim.reserved = htonl (0);
2684 memcpy (&dim.peer, peer, sizeof (struct GNUNET_PeerIdentity));
2686 /* notify ats about connecting peer */
2687 ats_notify_peer_disconnect (peer);
2690 while (cpos != NULL)
2692 transmit_to_client (cpos, &dim.header, GNUNET_NO);
2699 * Find a ForeignAddressList entry for the given neighbour
2700 * that matches the given address and transport.
2702 * @param neighbour which peer we care about
2703 * @param tname name of the transport plugin
2704 * @param session session to look for, NULL for 'any'; otherwise
2705 * can be used for the service to "learn" this session ID
2707 * @param addr binary address
2708 * @param addrlen length of addr
2709 * @return NULL if no such entry exists
2711 static struct ForeignAddressList *
2712 find_peer_address(struct NeighbourList *neighbour,
2714 struct Session *session,
2718 struct ReadyList *head;
2719 struct ForeignAddressList *pos;
2721 head = neighbour->plugins;
2722 while (head != NULL)
2724 if (0 == strcmp (tname, head->plugin->short_name))
2730 pos = head->addresses;
2731 while ( (pos != NULL) &&
2732 ( (pos->addrlen != addrlen) ||
2733 (memcmp(pos->addr, addr, addrlen) != 0) ) )
2735 if ( (session != NULL) &&
2736 (pos->session == session) )
2740 if ( (session != NULL) && (pos != NULL) )
2741 pos->session = session; /* learn it! */
2747 * Get the peer address struct for the given neighbour and
2748 * address. If it doesn't yet exist, create it.
2750 * @param neighbour which peer we care about
2751 * @param tname name of the transport plugin
2752 * @param session session of the plugin, or NULL for none
2753 * @param addr binary address
2754 * @param addrlen length of addr
2755 * @return NULL if we do not have a transport plugin for 'tname'
2757 static struct ForeignAddressList *
2758 add_peer_address (struct NeighbourList *neighbour,
2760 struct Session *session,
2764 struct ReadyList *head;
2765 struct ForeignAddressList *ret;
2768 ret = find_peer_address (neighbour, tname, session, addr, addrlen);
2771 head = neighbour->plugins;
2773 while (head != NULL)
2775 if (0 == strcmp (tname, head->plugin->short_name))
2781 ret = GNUNET_malloc(sizeof(struct ForeignAddressList) + addrlen);
2782 ret->session = session;
2783 if ((addrlen > 0) && (addr != NULL))
2785 ret->addr = (const char*) &ret[1];
2786 memcpy (&ret[1], addr, addrlen);
2793 ret->ressources = GNUNET_malloc(available_ressources * sizeof (struct ATS_ressource_entry));
2795 for (c=0; c<available_ressources; c++)
2797 struct ATS_ressource_entry *r = ret->ressources;
2799 r[c].atis_index = ressources[c].atis_index;
2800 if (0 == strcmp(neighbour->plugins->plugin->short_name,"unix"))
2802 r[c].c = ressources[c].c_unix;
2805 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"udp"))
2807 r[c].c = ressources[c].c_udp;
2810 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"tcp"))
2812 r[c].c = ressources[c].c_tcp;
2815 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"http"))
2817 r[c].c = ressources[c].c_http;
2820 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"https"))
2822 r[c].c = ressources[c].c_https;
2825 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"wlan"))
2827 r[c].c = ressources[c].c_wlan;
2833 r[c].c = ressources[c].c_default;
2834 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,"Assigning default cost to peer `%s' addr plugin `%s'! This should not happen!",
2835 GNUNET_i2s(&neighbour->peer), neighbour->plugins->plugin->short_name);
2839 ret->quality = GNUNET_malloc (available_quality_metrics * sizeof (struct ATS_quality_entry));
2840 ret->addrlen = addrlen;
2841 ret->expires = GNUNET_TIME_relative_to_absolute
2842 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2843 ret->latency = GNUNET_TIME_relative_get_forever();
2845 ret->timeout = GNUNET_TIME_relative_to_absolute
2846 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2847 ret->ready_list = head;
2848 ret->next = head->addresses;
2849 head->addresses = ret;
2855 * Closure for 'add_validated_address'.
2857 struct AddValidatedAddressContext
2860 * Entry that has been validated.
2862 const struct ValidationEntry *ve;
2865 * Flag set after we have added the address so
2866 * that we terminate the iteration next time.
2873 * Callback function used to fill a buffer of max bytes with a list of
2874 * addresses in the format used by HELLOs. Should use
2875 * "GNUNET_HELLO_add_address" as a helper function.
2877 * @param cls the 'struct AddValidatedAddressContext' with the validated address
2878 * @param max maximum number of bytes that can be written to buf
2879 * @param buf where to write the address information
2880 * @return number of bytes written, 0 to signal the
2881 * end of the iteration.
2884 add_validated_address (void *cls,
2885 size_t max, void *buf)
2887 struct AddValidatedAddressContext *avac = cls;
2888 const struct ValidationEntry *ve = avac->ve;
2890 if (GNUNET_YES == avac->done)
2892 avac->done = GNUNET_YES;
2893 return GNUNET_HELLO_add_address (ve->transport_name,
2894 GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION),
2904 * Closure for 'check_address_exists'.
2906 struct CheckAddressExistsClosure
2909 * Address to check for.
2914 * Name of the transport.
2921 struct Session *session;
2924 * Set to GNUNET_YES if the address exists.
2937 * Iterator over hash map entries. Checks if the given
2938 * validation entry is for the same address as what is given
2941 * @param cls the 'struct CheckAddressExistsClosure*'
2942 * @param key current key code (ignored)
2943 * @param value value in the hash map ('struct ValidationEntry')
2944 * @return GNUNET_YES if we should continue to
2945 * iterate (mismatch), GNUNET_NO if not (entry matched)
2948 check_address_exists (void *cls,
2949 const GNUNET_HashCode * key,
2952 struct CheckAddressExistsClosure *caec = cls;
2953 struct ValidationEntry *ve = value;
2955 if ( (0 == strcmp (caec->tname,
2956 ve->transport_name)) &&
2957 (caec->addrlen == ve->addrlen) &&
2958 (0 == memcmp (caec->addr,
2962 caec->exists = GNUNET_YES;
2965 if ( (ve->session != NULL) &&
2966 (caec->session == ve->session) )
2968 caec->exists = GNUNET_YES;
2977 * Iterator to free entries in the validation_map.
2979 * @param cls closure (unused)
2980 * @param key current key code
2981 * @param value value in the hash map (validation to abort)
2982 * @return GNUNET_YES (always)
2985 abort_validation (void *cls,
2986 const GNUNET_HashCode * key,
2989 struct ValidationEntry *va = value;
2991 if (GNUNET_SCHEDULER_NO_TASK != va->timeout_task)
2992 GNUNET_SCHEDULER_cancel (va->timeout_task);
2993 GNUNET_free (va->transport_name);
2994 if (va->chvc != NULL)
2996 va->chvc->ve_count--;
2997 if (va->chvc->ve_count == 0)
2999 GNUNET_CONTAINER_DLL_remove (chvc_head,
3002 GNUNET_free (va->chvc);
3012 * HELLO validation cleanup task (validation failed).
3014 * @param cls the 'struct ValidationEntry' that failed
3015 * @param tc scheduler context (unused)
3018 timeout_hello_validation (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3020 struct ValidationEntry *va = cls;
3021 struct GNUNET_PeerIdentity pid;
3023 va->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3024 GNUNET_STATISTICS_update (stats,
3025 gettext_noop ("# address validation timeouts"),
3028 GNUNET_CRYPTO_hash (&va->publicKey,
3030 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
3032 GNUNET_break (GNUNET_OK ==
3033 GNUNET_CONTAINER_multihashmap_remove (validation_map,
3036 abort_validation (NULL, NULL, va);
3041 neighbour_timeout_task (void *cls,
3042 const struct GNUNET_SCHEDULER_TaskContext *tc)
3044 struct NeighbourList *n = cls;
3047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
3048 "Neighbour `%4s' has timed out!\n", GNUNET_i2s (&n->id));
3050 GNUNET_STATISTICS_update (stats,
3051 gettext_noop ("# disconnects due to timeout"),
3054 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3055 disconnect_neighbour (n, GNUNET_NO);
3060 * Schedule the job that will cause us to send a PING to the
3061 * foreign address to evaluate its validity and latency.
3063 * @param fal address to PING
3066 schedule_next_ping (struct ForeignAddressList *fal);
3070 * Add the given address to the list of foreign addresses
3071 * available for the given peer (check for duplicates).
3073 * @param cls the respective 'struct NeighbourList' to update
3074 * @param tname name of the transport
3075 * @param expiration expiration time
3076 * @param addr the address
3077 * @param addrlen length of the address
3078 * @return GNUNET_OK (always)
3081 add_to_foreign_address_list (void *cls,
3083 struct GNUNET_TIME_Absolute expiration,
3087 struct NeighbourList *n = cls;
3088 struct ForeignAddressList *fal;
3091 GNUNET_STATISTICS_update (stats,
3092 gettext_noop ("# valid peer addresses returned by PEERINFO"),
3096 fal = find_peer_address (n, tname, NULL, addr, addrlen);
3099 #if DEBUG_TRANSPORT_HELLO
3100 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3101 "Adding address `%s' (%s) for peer `%4s' due to PEERINFO data for %llums.\n",
3102 a2s (tname, addr, addrlen),
3104 GNUNET_i2s (&n->id),
3105 expiration.abs_value);
3107 fal = add_peer_address (n, tname, NULL, addr, addrlen);
3110 GNUNET_STATISTICS_update (stats,
3111 gettext_noop ("# previously validated addresses lacking transport"),
3117 fal->expires = GNUNET_TIME_absolute_max (expiration,
3119 schedule_next_ping (fal);
3125 fal->expires = GNUNET_TIME_absolute_max (expiration,
3130 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3131 "Failed to add new address for `%4s'\n",
3132 GNUNET_i2s (&n->id));
3135 if (fal->validated == GNUNET_NO)
3137 fal->validated = GNUNET_YES;
3138 GNUNET_STATISTICS_update (stats,
3139 gettext_noop ("# peer addresses considered valid"),
3143 if (try == GNUNET_YES)
3145 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3146 "Have new addresses, will try to trigger transmissions.\n");
3147 try_transmission_to_peer (n);
3154 * Add addresses in validated HELLO "h" to the set of addresses
3155 * we have for this peer.
3157 * @param cls closure ('struct NeighbourList*')
3158 * @param peer id of the peer, NULL for last call
3159 * @param h hello message for the peer (can be NULL)
3160 * @param err_msg NULL if successful, otherwise contains error message
3163 add_hello_for_peer (void *cls,
3164 const struct GNUNET_PeerIdentity *peer,
3165 const struct GNUNET_HELLO_Message *h,
3166 const char *err_msg)
3168 struct NeighbourList *n = cls;
3170 if (err_msg != NULL)
3172 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3173 _("Error in communication with PEERINFO service\n"));
3178 GNUNET_STATISTICS_update (stats,
3179 gettext_noop ("# outstanding peerinfo iterate requests"),
3186 return; /* no HELLO available */
3188 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3189 "Peerinfo had `%s' message for peer `%4s', adding existing addresses.\n",
3193 if (GNUNET_YES != n->public_key_valid)
3195 GNUNET_HELLO_get_key (h, &n->publicKey);
3196 n->public_key_valid = GNUNET_YES;
3198 GNUNET_HELLO_iterate_addresses (h,
3200 &add_to_foreign_address_list,
3206 * Create a fresh entry in our neighbour list for the given peer.
3207 * Will try to transmit our current HELLO to the new neighbour.
3208 * Do not call this function directly, use 'setup_peer_check_blacklist.
3210 * @param peer the peer for which we create the entry
3211 * @param do_hello should we schedule transmitting a HELLO
3212 * @return the new neighbour list entry
3214 static struct NeighbourList *
3215 setup_new_neighbour (const struct GNUNET_PeerIdentity *peer,
3218 struct NeighbourList *n;
3219 struct TransportPlugin *tp;
3220 struct ReadyList *rl;
3223 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3224 "Setting up state for neighbour `%4s'\n",
3227 GNUNET_assert (our_hello != NULL);
3228 GNUNET_STATISTICS_update (stats,
3229 gettext_noop ("# active neighbours"),
3232 n = GNUNET_malloc (sizeof (struct NeighbourList));
3233 n->next = neighbours;
3237 GNUNET_TIME_relative_to_absolute
3238 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
3239 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
3240 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
3241 MAX_BANDWIDTH_CARRY_S);
3245 if ((tp->api->send != NULL) && (!is_blacklisted(peer, tp)))
3247 rl = GNUNET_malloc (sizeof (struct ReadyList));
3249 rl->next = n->plugins;
3252 rl->addresses = NULL;
3256 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
3258 n->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
3259 &neighbour_timeout_task, n);
3262 GNUNET_STATISTICS_update (stats,
3263 gettext_noop ("# peerinfo new neighbor iterate requests"),
3266 GNUNET_STATISTICS_update (stats,
3267 gettext_noop ("# outstanding peerinfo iterate requests"),
3270 n->piter = GNUNET_PEERINFO_iterate (peerinfo, peer,
3271 GNUNET_TIME_UNIT_FOREVER_REL,
3272 &add_hello_for_peer, n);
3274 GNUNET_STATISTICS_update (stats,
3275 gettext_noop ("# HELLO's sent to new neighbors"),
3278 transmit_to_peer (NULL, NULL, 0,
3279 HELLO_ADDRESS_EXPIRATION,
3280 (const char *) our_hello, GNUNET_HELLO_size(our_hello),
3288 * Function called after we have checked if communicating
3289 * with a given peer is acceptable.
3291 * @param cls closure
3292 * @param n NULL if communication is not acceptable
3294 typedef void (*SetupContinuation)(void *cls,
3295 struct NeighbourList *n);
3299 * Information kept for each client registered to perform
3305 * This is a linked list.
3307 struct Blacklisters *next;
3310 * This is a linked list.
3312 struct Blacklisters *prev;
3315 * Client responsible for this entry.
3317 struct GNUNET_SERVER_Client *client;
3320 * Blacklist check that we're currently performing.
3322 struct BlacklistCheck *bc;
3328 * Head of DLL of blacklisting clients.
3330 static struct Blacklisters *bl_head;
3333 * Tail of DLL of blacklisting clients.
3335 static struct Blacklisters *bl_tail;
3339 * Context we use when performing a blacklist check.
3341 struct BlacklistCheck
3345 * This is a linked list.
3347 struct BlacklistCheck *next;
3350 * This is a linked list.
3352 struct BlacklistCheck *prev;
3355 * Peer being checked.
3357 struct GNUNET_PeerIdentity peer;
3360 * Option for setup neighbour afterwards.
3365 * Continuation to call with the result.
3367 SetupContinuation cont;
3375 * Current transmission request handle for this client, or NULL if no
3376 * request is pending.
3378 struct GNUNET_CONNECTION_TransmitHandle *th;
3381 * Our current position in the blacklisters list.
3383 struct Blacklisters *bl_pos;
3386 * Current task performing the check.
3388 GNUNET_SCHEDULER_TaskIdentifier task;
3393 * Head of DLL of active blacklisting queries.
3395 static struct BlacklistCheck *bc_head;
3398 * Tail of DLL of active blacklisting queries.
3400 static struct BlacklistCheck *bc_tail;
3404 * Perform next action in the blacklist check.
3406 * @param cls the 'struct BlacklistCheck*'
3410 do_blacklist_check (void *cls,
3411 const struct GNUNET_SCHEDULER_TaskContext *tc);
3414 * Transmit blacklist query to the client.
3416 * @param cls the 'struct BlacklistCheck'
3417 * @param size number of bytes allowed
3418 * @param buf where to copy the message
3419 * @return number of bytes copied to buf
3422 transmit_blacklist_message (void *cls,
3426 struct BlacklistCheck *bc = cls;
3427 struct Blacklisters *bl;
3428 struct BlacklistMessage bm;
3433 GNUNET_assert (bc->task == GNUNET_SCHEDULER_NO_TASK);
3434 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3439 bm.header.size = htons (sizeof (struct BlacklistMessage));
3440 bm.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_QUERY);
3441 bm.is_allowed = htonl (0);
3443 memcpy (buf, &bm, sizeof (bm));
3444 GNUNET_SERVER_receive_done (bl->client, GNUNET_OK);
3450 * Perform next action in the blacklist check.
3452 * @param cls the 'struct BlacklistCheck*'
3456 do_blacklist_check (void *cls,
3457 const struct GNUNET_SCHEDULER_TaskContext *tc)
3459 struct BlacklistCheck *bc = cls;
3460 struct Blacklisters *bl;
3462 bc->task = GNUNET_SCHEDULER_NO_TASK;
3466 bc->cont (bc->cont_cls,
3467 setup_new_neighbour (&bc->peer, bc->do_hello));
3474 bc->th = GNUNET_SERVER_notify_transmit_ready (bl->client,
3475 sizeof (struct BlacklistMessage),
3476 GNUNET_TIME_UNIT_FOREVER_REL,
3477 &transmit_blacklist_message,
3484 * Obtain a 'struct NeighbourList' for the given peer. If such an entry
3485 * does not yet exist, check the blacklist. If the blacklist says creating
3486 * one is acceptable, create one and call the continuation; otherwise
3487 * call the continuation with NULL.
3489 * @param peer peer to setup or look up a struct NeighbourList for
3490 * @param do_hello should we also schedule sending our HELLO to the peer
3491 * if this is a new record
3492 * @param cont function to call with the 'struct NeigbhbourList*'
3493 * @param cont_cls closure for cont
3496 setup_peer_check_blacklist (const struct GNUNET_PeerIdentity *peer,
3498 SetupContinuation cont,
3501 struct NeighbourList *n;
3502 struct BlacklistCheck *bc;
3504 n = find_neighbour(peer);
3511 if (bl_head == NULL)
3514 cont (cont_cls, setup_new_neighbour (peer, do_hello));
3516 setup_new_neighbour(peer, do_hello);
3519 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3520 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3522 bc->do_hello = do_hello;
3524 bc->cont_cls = cont_cls;
3525 bc->bl_pos = bl_head;
3526 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3532 * Function called with the result of querying a new blacklister about
3533 * it being allowed (or not) to continue to talk to an existing neighbour.
3535 * @param cls the original 'struct NeighbourList'
3536 * @param n NULL if we need to disconnect
3539 confirm_or_drop_neighbour (void *cls,
3540 struct NeighbourList *n)
3542 struct NeighbourList * orig = cls;
3546 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3547 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&orig->id),
3548 "confirm_or_drop_neighboUr");
3549 disconnect_neighbour (orig, GNUNET_NO);
3555 * Handle a request to start a blacklist.
3557 * @param cls closure (always NULL)
3558 * @param client identification of the client
3559 * @param message the actual message
3562 handle_blacklist_init (void *cls,
3563 struct GNUNET_SERVER_Client *client,
3564 const struct GNUNET_MessageHeader *message)
3566 struct Blacklisters *bl;
3567 struct BlacklistCheck *bc;
3568 struct NeighbourList *n;
3573 if (bl->client == client)
3576 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3581 bl = GNUNET_malloc (sizeof (struct Blacklisters));
3582 bl->client = client;
3583 GNUNET_SERVER_client_keep (client);
3584 GNUNET_CONTAINER_DLL_insert_after (bl_head, bl_tail, bl_tail, bl);
3585 /* confirm that all existing connections are OK! */
3589 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3590 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3592 bc->do_hello = GNUNET_NO;
3593 bc->cont = &confirm_or_drop_neighbour;
3596 if (n == neighbours) /* all would wait for the same client, no need to
3597 create more than just the first task right now */
3598 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3606 * Handle a request to blacklist a peer.
3608 * @param cls closure (always NULL)
3609 * @param client identification of the client
3610 * @param message the actual message
3613 handle_blacklist_reply (void *cls,
3614 struct GNUNET_SERVER_Client *client,
3615 const struct GNUNET_MessageHeader *message)
3617 const struct BlacklistMessage *msg = (const struct BlacklistMessage*) message;
3618 struct Blacklisters *bl;
3619 struct BlacklistCheck *bc;
3622 while ( (bl != NULL) &&
3623 (bl->client != client) )
3627 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3632 if (ntohl (msg->is_allowed) == GNUNET_SYSERR)
3634 bc->cont (bc->cont_cls, NULL);
3635 GNUNET_CONTAINER_DLL_remove (bc_head, bc_tail, bc);
3640 bc->bl_pos = bc->bl_pos->next;
3641 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3644 /* check if any other bc's are waiting for this blacklister */
3648 if ( (bc->bl_pos == bl) &&
3649 (GNUNET_SCHEDULER_NO_TASK == bc->task) )
3650 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3658 * Send periodic PING messages to a given foreign address.
3660 * @param cls our 'struct PeriodicValidationContext*'
3661 * @param tc task context
3664 send_periodic_ping (void *cls,
3665 const struct GNUNET_SCHEDULER_TaskContext *tc)
3667 struct ForeignAddressList *peer_address = cls;
3668 struct TransportPlugin *tp;
3669 struct ValidationEntry *va;
3670 struct NeighbourList *neighbour;
3671 struct TransportPingMessage ping;
3672 struct CheckAddressExistsClosure caec;
3674 uint16_t hello_size;
3678 peer_address->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
3679 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3681 tp = peer_address->ready_list->plugin;
3682 neighbour = peer_address->ready_list->neighbour;
3683 if (GNUNET_YES != neighbour->public_key_valid)
3685 /* no public key yet, try again later */
3686 schedule_next_ping (peer_address);
3689 caec.addr = peer_address->addr;
3690 caec.addrlen = peer_address->addrlen;
3691 caec.tname = tp->short_name;
3692 caec.session = peer_address->session;
3693 caec.exists = GNUNET_NO;
3694 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
3695 &check_address_exists,
3697 if (caec.exists == GNUNET_YES)
3699 /* During validation attempts we will likely trigger the other
3700 peer trying to validate our address which in turn will cause
3701 it to send us its HELLO, so we expect to hit this case rather
3702 frequently. Only print something if we are very verbose. */
3703 #if DEBUG_TRANSPORT > 1
3704 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3705 "Some validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
3706 (peer_address->addr != NULL)
3707 ? a2s (tp->short_name,
3709 peer_address->addrlen)
3712 GNUNET_i2s (&neighbour->id));
3714 schedule_next_ping (peer_address);
3717 va = GNUNET_malloc (sizeof (struct ValidationEntry) + peer_address->addrlen);
3718 va->transport_name = GNUNET_strdup (tp->short_name);
3719 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
3721 va->send_time = GNUNET_TIME_absolute_get();
3722 va->session = peer_address->session;
3723 if (peer_address->addr != NULL)
3725 va->addr = (const void*) &va[1];
3726 memcpy (&va[1], peer_address->addr, peer_address->addrlen);
3727 va->addrlen = peer_address->addrlen;
3729 memcpy(&va->publicKey,
3730 &neighbour->publicKey,
3731 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
3733 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
3734 &timeout_hello_validation,
3736 GNUNET_CONTAINER_multihashmap_put (validation_map,
3737 &neighbour->id.hashPubKey,
3739 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3741 if (peer_address->validated != GNUNET_YES)
3742 hello_size = GNUNET_HELLO_size(our_hello);
3746 tsize = sizeof(struct TransportPingMessage) + hello_size;
3748 if (peer_address->addr != NULL)
3750 slen = strlen (tp->short_name) + 1;
3751 tsize += slen + peer_address->addrlen;
3755 slen = 0; /* make gcc happy */
3757 message_buf = GNUNET_malloc(tsize);
3758 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
3759 ping.challenge = htonl(va->challenge);
3760 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
3761 if (peer_address->validated != GNUNET_YES)
3763 memcpy(message_buf, our_hello, hello_size);
3766 if (peer_address->addr != NULL)
3768 ping.header.size = htons(sizeof(struct TransportPingMessage) +
3769 peer_address->addrlen +
3771 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
3774 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
3776 peer_address->addrlen);
3780 ping.header.size = htons(sizeof(struct TransportPingMessage));
3783 memcpy(&message_buf[hello_size],
3785 sizeof(struct TransportPingMessage));
3787 #if DEBUG_TRANSPORT_REVALIDATION
3788 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3789 "Performing re-validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s'\n",
3790 (peer_address->addr != NULL)
3791 ? a2s (peer_address->plugin->short_name,
3793 peer_address->addrlen)
3796 GNUNET_i2s (&neighbour->id),
3797 "HELLO", hello_size,
3800 if (peer_address->validated != GNUNET_YES)
3801 GNUNET_STATISTICS_update (stats,
3802 gettext_noop ("# PING with HELLO messages sent"),
3806 GNUNET_STATISTICS_update (stats,
3807 gettext_noop ("# PING without HELLO messages sent"),
3810 GNUNET_STATISTICS_update (stats,
3811 gettext_noop ("# PING messages sent for re-validation"),
3814 transmit_to_peer (NULL, peer_address,
3815 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
3816 HELLO_VERIFICATION_TIMEOUT,
3818 GNUNET_YES, neighbour);
3819 GNUNET_free(message_buf);
3820 schedule_next_ping (peer_address);
3825 * Schedule the job that will cause us to send a PING to the
3826 * foreign address to evaluate its validity and latency.
3828 * @param fal address to PING
3831 schedule_next_ping (struct ForeignAddressList *fal)
3833 struct GNUNET_TIME_Relative delay;
3835 if (fal->revalidate_task != GNUNET_SCHEDULER_NO_TASK)
3837 delay = GNUNET_TIME_absolute_get_remaining (fal->expires);
3838 delay.rel_value /= 2; /* do before expiration */
3839 delay = GNUNET_TIME_relative_min (delay,
3840 LATENCY_EVALUATION_MAX_DELAY);
3841 if (GNUNET_YES != fal->estimated)
3843 delay = GNUNET_TIME_UNIT_ZERO;
3844 fal->estimated = GNUNET_YES;
3846 if (GNUNET_YES == fal->connected)
3848 delay = GNUNET_TIME_relative_min (delay,
3849 CONNECTED_LATENCY_EVALUATION_MAX_DELAY);
3851 /* FIXME: also adjust delay based on how close the last
3852 observed latency is to the latency of the best alternative */
3853 /* bound how fast we can go */
3854 delay = GNUNET_TIME_relative_max (delay,
3855 GNUNET_TIME_UNIT_SECONDS);
3856 /* randomize a bit (to avoid doing all at the same time) */
3857 delay.rel_value += GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1000);
3858 fal->revalidate_task = GNUNET_SCHEDULER_add_delayed(delay,
3859 &send_periodic_ping,
3867 * Function that will be called if we receive some payload
3868 * from another peer.
3870 * @param message the payload
3871 * @param n peer who claimed to be the sender
3874 handle_payload_message (const struct GNUNET_MessageHeader *message,
3875 struct NeighbourList *n)
3877 struct InboundMessage *im;
3878 struct TransportClient *cpos;
3881 msize = ntohs (message->size);
3882 if (n->received_pong == GNUNET_NO)
3884 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3885 "Received message of type %u and size %u from `%4s', but no pong yet!!\n",
3886 ntohs (message->type),
3887 ntohs (message->size),
3888 GNUNET_i2s (&n->id));
3889 GNUNET_free_non_null (n->pre_connect_message_buffer);
3890 n->pre_connect_message_buffer = GNUNET_malloc (msize);
3891 memcpy (n->pre_connect_message_buffer, message, msize);
3896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3897 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
3898 ntohs (message->type),
3899 ntohs (message->size),
3900 GNUNET_i2s (&n->id));
3902 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3905 n->quota_violation_count++;
3907 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3908 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
3909 n->in_tracker.available_bytes_per_s__,
3910 n->quota_violation_count);
3912 /* Discount 32k per violation */
3913 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3918 if (n->quota_violation_count > 0)
3920 /* try to add 32k back */
3921 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3923 n->quota_violation_count--;
3926 GNUNET_STATISTICS_update (stats,
3927 gettext_noop ("# payload received from other peers"),
3930 /* transmit message to all clients */
3931 uint32_t ats_count = 2;
3932 size_t size = sizeof (struct InboundMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information) + msize;
3933 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
3936 im = GNUNET_malloc (size);
3937 im->header.size = htons (size);
3938 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
3940 im->ats_count = htonl(ats_count);
3941 /* Setting ATS data */
3942 (&(im->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
3943 (&(im->ats))[0].value = htonl (n->distance);
3944 (&(im->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
3945 (&(im->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
3946 (&(im->ats))[ats_count].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
3947 (&(im->ats))[ats_count].value = htonl (0);
3949 memcpy (&((&(im->ats))[ats_count+1]), message, msize);
3951 while (cpos != NULL)
3953 transmit_to_client (cpos, &im->header, GNUNET_YES);
3961 * Iterator over hash map entries. Checks if the given validation
3962 * entry is for the same challenge as what is given in the PONG.
3964 * @param cls the 'struct TransportPongMessage*'
3965 * @param key peer identity
3966 * @param value value in the hash map ('struct ValidationEntry')
3967 * @return GNUNET_YES if we should continue to
3968 * iterate (mismatch), GNUNET_NO if not (entry matched)
3971 check_pending_validation (void *cls,
3972 const GNUNET_HashCode * key,
3975 const struct TransportPongMessage *pong = cls;
3976 struct ValidationEntry *ve = value;
3977 struct AddValidatedAddressContext avac;
3978 unsigned int challenge = ntohl(pong->challenge);
3979 struct GNUNET_HELLO_Message *hello;
3980 struct GNUNET_PeerIdentity target;
3981 struct NeighbourList *n;
3982 struct ForeignAddressList *fal;
3983 struct OwnAddressList *oal;
3984 struct TransportPlugin *tp;
3985 struct GNUNET_MessageHeader *prem;
3991 ps = ntohs (pong->header.size);
3992 if (ps < sizeof (struct TransportPongMessage))
3994 GNUNET_break_op (0);
3997 addr = (const char*) &pong[1];
3998 slen = strlen (ve->transport_name) + 1;
3999 if ( (ps - sizeof (struct TransportPongMessage) < slen) ||
4000 (ve->challenge != challenge) ||
4001 (addr[slen-1] != '\0') ||
4002 (0 != strcmp (addr, ve->transport_name)) ||
4003 (ntohl (pong->purpose.size)
4004 != sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
4006 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
4007 sizeof (struct GNUNET_PeerIdentity) + ps - sizeof (struct TransportPongMessage)) )
4012 alen = ps - sizeof (struct TransportPongMessage) - slen;
4013 switch (ntohl (pong->purpose.purpose))
4015 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN:
4016 if ( (ve->addrlen + slen != ntohl (pong->addrlen)) ||
4017 (0 != memcmp (&addr[slen],
4021 return GNUNET_YES; /* different entry, keep trying! */
4023 if (0 != memcmp (&pong->pid,
4025 sizeof (struct GNUNET_PeerIdentity)))
4027 GNUNET_break_op (0);
4031 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN,
4036 GNUNET_break_op (0);
4041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4042 "Confirmed validity of address, peer `%4s' has address `%s' (%s).\n",
4044 a2s (ve->transport_name,
4045 (const struct sockaddr *) ve->addr,
4047 ve->transport_name);
4050 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING:
4051 if (0 != memcmp (&pong->pid,
4053 sizeof (struct GNUNET_PeerIdentity)))
4055 GNUNET_break_op (0);
4058 if (ve->addrlen != 0)
4060 /* must have been for a different validation entry */
4063 tp = find_transport (ve->transport_name);
4069 oal = tp->addresses;
4072 if ( (oal->addrlen == alen) &&
4073 (0 == memcmp (&oal[1],
4081 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4082 _("Not accepting PONG with address `%s' since I cannot confirm having this address.\n"),
4083 a2s (ve->transport_name,
4089 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING,
4094 GNUNET_break_op (0);
4099 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4100 "Confirmed that peer `%4s' is talking to us using address `%s' (%s) for us.\n",
4102 a2s (ve->transport_name,
4105 ve->transport_name);
4109 GNUNET_break_op (0);
4112 if (GNUNET_TIME_absolute_get_remaining (GNUNET_TIME_absolute_ntoh (pong->expiration)).rel_value == 0)
4114 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4115 _("Received expired signature. Check system time.\n"));
4118 GNUNET_STATISTICS_update (stats,
4119 gettext_noop ("# address validation successes"),
4122 /* create the updated HELLO */
4123 GNUNET_CRYPTO_hash (&ve->publicKey,
4124 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4125 &target.hashPubKey);
4126 if (ve->addr != NULL)
4128 avac.done = GNUNET_NO;
4130 hello = GNUNET_HELLO_create (&ve->publicKey,
4131 &add_validated_address,
4133 GNUNET_PEERINFO_add_peer (peerinfo,
4135 GNUNET_free (hello);
4137 n = find_neighbour (&target);
4140 n->publicKey = ve->publicKey;
4141 n->public_key_valid = GNUNET_YES;
4142 fal = add_peer_address (n,
4147 GNUNET_assert (fal != NULL);
4148 fal->expires = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
4149 fal->validated = GNUNET_YES;
4150 mark_address_connected (fal);
4151 GNUNET_STATISTICS_update (stats,
4152 gettext_noop ("# peer addresses considered valid"),
4155 fal->latency = GNUNET_TIME_absolute_get_duration (ve->send_time);
4156 update_addr_value (fal, GNUNET_TIME_absolute_get_duration (ve->send_time).rel_value, GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4158 schedule_next_ping (fal);
4159 if (n->latency.rel_value == GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
4160 n->latency = fal->latency;
4162 n->latency.rel_value = (fal->latency.rel_value + n->latency.rel_value) / 2;
4164 n->distance = fal->distance;
4165 if (GNUNET_NO == n->received_pong)
4167 n->received_pong = GNUNET_YES;
4169 notify_clients_connect (&target, n->latency, n->distance);
4170 if (NULL != (prem = n->pre_connect_message_buffer))
4172 n->pre_connect_message_buffer = NULL;
4173 handle_payload_message (prem, n);
4177 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4179 GNUNET_SCHEDULER_cancel (n->retry_task);
4180 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4181 try_transmission_to_peer (n);
4185 /* clean up validation entry */
4186 GNUNET_assert (GNUNET_YES ==
4187 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4190 abort_validation (NULL, NULL, ve);
4196 * Function that will be called if we receive a validation
4197 * of an address challenge that we transmitted to another
4198 * peer. Note that the validation should only be considered
4199 * acceptable if the challenge matches AND if the sender
4200 * address is at least a plausible address for this peer
4201 * (otherwise we may be seeing a MiM attack).
4203 * @param cls closure
4204 * @param message the pong message
4205 * @param peer who responded to our challenge
4206 * @param sender_address string describing our sender address (as observed
4207 * by the other peer in binary format)
4208 * @param sender_address_len number of bytes in 'sender_address'
4211 handle_pong (void *cls, const struct GNUNET_MessageHeader *message,
4212 const struct GNUNET_PeerIdentity *peer,
4213 const char *sender_address,
4214 size_t sender_address_len)
4216 #if DEBUG_TRANSPORT > 1
4217 /* we get tons of these that just get discarded, only log
4218 if we are quite verbose */
4219 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4220 "Receiving `%s' message from `%4s'.\n", "PONG",
4223 GNUNET_STATISTICS_update (stats,
4224 gettext_noop ("# PONG messages received"),
4227 if (GNUNET_SYSERR !=
4228 GNUNET_CONTAINER_multihashmap_get_multiple (validation_map,
4230 &check_pending_validation,
4233 /* This is *expected* to happen a lot since we send
4234 PONGs to *all* known addresses of the sender of
4235 the PING, so most likely we get multiple PONGs
4236 per PING, and all but the first PONG will end up
4237 here. So really we should not print anything here
4238 unless we want to be very, very verbose... */
4239 #if DEBUG_TRANSPORT > 2
4240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4241 "Received `%s' message from `%4s' but have no record of a matching `%s' message. Ignoring.\n",
4253 * Try to validate a neighbour's address by sending him our HELLO and a PING.
4255 * @param cls the 'struct ValidationEntry*'
4256 * @param neighbour neighbour to validate, NULL if validation failed
4259 transmit_hello_and_ping (void *cls,
4260 struct NeighbourList *neighbour)
4262 struct ValidationEntry *va = cls;
4263 struct ForeignAddressList *peer_address;
4264 struct TransportPingMessage ping;
4265 uint16_t hello_size;
4268 struct GNUNET_PeerIdentity id;
4271 GNUNET_CRYPTO_hash (&va->publicKey,
4272 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4274 if (neighbour == NULL)
4276 /* FIXME: stats... */
4277 GNUNET_break (GNUNET_OK ==
4278 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4281 abort_validation (NULL, NULL, va);
4284 neighbour->publicKey = va->publicKey;
4285 neighbour->public_key_valid = GNUNET_YES;
4286 peer_address = add_peer_address (neighbour,
4287 va->transport_name, NULL,
4288 (const void*) &va[1],
4290 if (peer_address == NULL)
4292 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4293 "Failed to add peer `%4s' for plugin `%s'\n",
4294 GNUNET_i2s (&neighbour->id),
4295 va->transport_name);
4296 GNUNET_break (GNUNET_OK ==
4297 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4300 abort_validation (NULL, NULL, va);
4303 hello_size = GNUNET_HELLO_size(our_hello);
4304 slen = strlen(va->transport_name) + 1;
4305 tsize = sizeof(struct TransportPingMessage) + hello_size + va->addrlen + slen;
4306 message_buf = GNUNET_malloc(tsize);
4307 ping.challenge = htonl(va->challenge);
4308 ping.header.size = htons(sizeof(struct TransportPingMessage) + slen + va->addrlen);
4309 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
4310 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
4311 memcpy(message_buf, our_hello, hello_size);
4312 memcpy(&message_buf[hello_size],
4314 sizeof(struct TransportPingMessage));
4315 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
4318 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
4322 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4323 "Performing validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s' (%u bytes)\n",
4326 : a2s (va->transport_name,
4327 (const void*) &va[1], va->addrlen),
4329 GNUNET_i2s (&neighbour->id),
4330 "HELLO", hello_size,
4331 "PING", sizeof (struct TransportPingMessage) + va->addrlen + slen);
4334 GNUNET_STATISTICS_update (stats,
4335 gettext_noop ("# PING messages sent for initial validation"),
4338 transmit_to_peer (NULL, peer_address,
4339 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
4340 HELLO_VERIFICATION_TIMEOUT,
4342 GNUNET_YES, neighbour);
4343 GNUNET_free(message_buf);
4348 * Check if the given address is already being validated; if not,
4349 * append the given address to the list of entries that are being be
4350 * validated and initiate validation.
4352 * @param cls closure ('struct CheckHelloValidatedContext *')
4353 * @param tname name of the transport
4354 * @param expiration expiration time
4355 * @param addr the address
4356 * @param addrlen length of the address
4357 * @return GNUNET_OK (always)
4360 run_validation (void *cls,
4362 struct GNUNET_TIME_Absolute expiration,
4366 struct CheckHelloValidatedContext *chvc = cls;
4367 struct GNUNET_PeerIdentity id;
4368 struct TransportPlugin *tp;
4369 struct ValidationEntry *va;
4370 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4371 struct CheckAddressExistsClosure caec;
4372 struct OwnAddressList *oal;
4374 GNUNET_assert (addr != NULL);
4376 GNUNET_STATISTICS_update (stats,
4377 gettext_noop ("# peer addresses scheduled for validation"),
4380 tp = find_transport (tname);
4383 GNUNET_log (GNUNET_ERROR_TYPE_INFO |
4384 GNUNET_ERROR_TYPE_BULK,
4386 ("Transport `%s' not loaded, will not try to validate peer address using this transport.\n"),
4388 GNUNET_STATISTICS_update (stats,
4389 gettext_noop ("# peer addresses not validated (plugin not available)"),
4394 /* check if this is one of our own addresses */
4395 oal = tp->addresses;
4398 if ( (oal->addrlen == addrlen) &&
4399 (0 == memcmp (&oal[1],
4403 /* not plausible, this address is equivalent to our own address! */
4404 GNUNET_STATISTICS_update (stats,
4405 gettext_noop ("# peer addresses not validated (loopback)"),
4412 GNUNET_HELLO_get_key (chvc->hello, &pk);
4413 GNUNET_CRYPTO_hash (&pk,
4415 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4418 if (is_blacklisted(&id, tp))
4421 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4422 "Attempted to validate blacklisted peer `%s' using `%s'!\n",
4430 caec.addrlen = addrlen;
4431 caec.session = NULL;
4433 caec.exists = GNUNET_NO;
4434 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
4435 &check_address_exists,
4437 if (caec.exists == GNUNET_YES)
4439 /* During validation attempts we will likely trigger the other
4440 peer trying to validate our address which in turn will cause
4441 it to send us its HELLO, so we expect to hit this case rather
4442 frequently. Only print something if we are very verbose. */
4443 #if DEBUG_TRANSPORT > 1
4444 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4445 "Validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
4446 a2s (tname, addr, addrlen),
4450 GNUNET_STATISTICS_update (stats,
4451 gettext_noop ("# peer addresses not validated (in progress)"),
4456 va = GNUNET_malloc (sizeof (struct ValidationEntry) + addrlen);
4459 va->transport_name = GNUNET_strdup (tname);
4460 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
4462 va->send_time = GNUNET_TIME_absolute_get();
4463 va->addr = (const void*) &va[1];
4464 memcpy (&va[1], addr, addrlen);
4465 va->addrlen = addrlen;
4466 GNUNET_HELLO_get_key (chvc->hello,
4468 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
4469 &timeout_hello_validation,
4471 GNUNET_CONTAINER_multihashmap_put (validation_map,
4474 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4475 setup_peer_check_blacklist (&id, GNUNET_NO,
4476 &transmit_hello_and_ping,
4483 * Check if addresses in validated hello "h" overlap with
4484 * those in "chvc->hello" and validate the rest.
4486 * @param cls closure
4487 * @param peer id of the peer, NULL for last call
4488 * @param h hello message for the peer (can be NULL)
4489 * @param err_msg NULL if successful, otherwise contains error message
4492 check_hello_validated (void *cls,
4493 const struct GNUNET_PeerIdentity *peer,
4494 const struct GNUNET_HELLO_Message *h,
4495 const char *err_msg)
4497 struct CheckHelloValidatedContext *chvc = cls;
4498 struct GNUNET_HELLO_Message *plain_hello;
4499 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4500 struct GNUNET_PeerIdentity target;
4501 struct NeighbourList *n;
4503 if (err_msg != NULL)
4505 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4506 _("Error in communication with PEERINFO service\n"));
4512 GNUNET_STATISTICS_update (stats,
4513 gettext_noop ("# outstanding peerinfo iterate requests"),
4517 if (GNUNET_NO == chvc->hello_known)
4519 /* notify PEERINFO about the peer now, so that we at least
4520 have the public key if some other component needs it */
4521 GNUNET_HELLO_get_key (chvc->hello, &pk);
4522 GNUNET_CRYPTO_hash (&pk,
4523 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4524 &target.hashPubKey);
4525 plain_hello = GNUNET_HELLO_create (&pk,
4528 GNUNET_PEERINFO_add_peer (peerinfo, plain_hello);
4529 GNUNET_free (plain_hello);
4530 #if DEBUG_TRANSPORT_HELLO
4531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4532 "PEERINFO had no `%s' message for peer `%4s', full validation needed.\n",
4534 GNUNET_i2s (&target));
4536 GNUNET_STATISTICS_update (stats,
4537 gettext_noop ("# new HELLOs requiring full validation"),
4540 GNUNET_HELLO_iterate_addresses (chvc->hello,
4547 GNUNET_STATISTICS_update (stats,
4548 gettext_noop ("# duplicate HELLO (peer known)"),
4553 if (chvc->ve_count == 0)
4555 GNUNET_CONTAINER_DLL_remove (chvc_head,
4564 #if DEBUG_TRANSPORT_HELLO
4565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4566 "PEERINFO had `%s' message for peer `%4s', validating only new addresses.\n",
4570 chvc->hello_known = GNUNET_YES;
4571 n = find_neighbour (peer);
4574 #if DEBUG_TRANSPORT_HELLO
4575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4576 "Calling hello_iterate_addresses for %s!\n",
4579 GNUNET_HELLO_iterate_addresses (h,
4581 &add_to_foreign_address_list,
4583 try_transmission_to_peer (n);
4587 #if DEBUG_TRANSPORT_HELLO
4588 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4589 "No existing neighbor record for %s!\n",
4592 GNUNET_STATISTICS_update (stats,
4593 gettext_noop ("# no existing neighbour record (validating HELLO)"),
4597 GNUNET_STATISTICS_update (stats,
4598 gettext_noop ("# HELLO validations (update case)"),
4601 GNUNET_HELLO_iterate_new_addresses (chvc->hello,
4603 GNUNET_TIME_relative_to_absolute (HELLO_REVALIDATION_START_TIME),
4610 * Process HELLO-message.
4612 * @param plugin transport involved, may be NULL
4613 * @param message the actual message
4614 * @return GNUNET_OK if the HELLO was well-formed, GNUNET_SYSERR otherwise
4617 process_hello (struct TransportPlugin *plugin,
4618 const struct GNUNET_MessageHeader *message)
4621 struct GNUNET_PeerIdentity target;
4622 const struct GNUNET_HELLO_Message *hello;
4623 struct CheckHelloValidatedContext *chvc;
4624 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
4625 #if DEBUG_TRANSPORT_HELLO > 2
4628 hsize = ntohs (message->size);
4629 if ((ntohs (message->type) != GNUNET_MESSAGE_TYPE_HELLO) ||
4630 (hsize < sizeof (struct GNUNET_MessageHeader)))
4633 return GNUNET_SYSERR;
4635 GNUNET_STATISTICS_update (stats,
4636 gettext_noop ("# HELLOs received for validation"),
4640 /* first, check if load is too high */
4641 if (GNUNET_SCHEDULER_get_load (GNUNET_SCHEDULER_PRIORITY_BACKGROUND) > MAX_HELLO_LOAD)
4643 GNUNET_STATISTICS_update (stats,
4644 gettext_noop ("# HELLOs ignored due to high load"),
4647 #if DEBUG_TRANSPORT_HELLO
4648 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4649 "Ignoring `%s' for `%4s', load too high.\n",
4651 GNUNET_i2s (&target));
4655 hello = (const struct GNUNET_HELLO_Message *) message;
4656 if (GNUNET_OK != GNUNET_HELLO_get_key (hello, &publicKey))
4658 #if DEBUG_TRANSPORT_HELLO
4659 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4660 "Unable to get public key from `%s' for `%4s'!\n",
4662 GNUNET_i2s (&target));
4664 GNUNET_break_op (0);
4665 return GNUNET_SYSERR;
4668 GNUNET_CRYPTO_hash (&publicKey,
4669 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4670 &target.hashPubKey);
4672 #if DEBUG_TRANSPORT_HELLO
4673 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4674 "Received `%s' message for `%4s'\n",
4676 GNUNET_i2s (&target));
4679 if (0 == memcmp (&my_identity,
4681 sizeof (struct GNUNET_PeerIdentity)))
4683 GNUNET_STATISTICS_update (stats,
4684 gettext_noop ("# HELLOs ignored for validation (is my own HELLO)"),
4690 while (NULL != chvc)
4692 if (GNUNET_HELLO_equals (hello,
4694 GNUNET_TIME_absolute_get ()).abs_value > 0)
4696 #if DEBUG_TRANSPORT_HELLO > 2
4697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4698 "Received duplicate `%s' message for `%4s'; ignored\n",
4700 GNUNET_i2s (&target));
4702 return GNUNET_OK; /* validation already pending */
4704 if (GNUNET_HELLO_size(hello) == GNUNET_HELLO_size (chvc->hello))
4705 GNUNET_break (0 != memcmp (hello, chvc->hello,
4706 GNUNET_HELLO_size(hello)));
4711 struct NeighbourList *temp_neighbor = find_neighbour(&target);
4712 if ((NULL != temp_neighbor))
4714 fprintf(stderr, "Already know peer, ignoring hello\n");
4719 #if DEBUG_TRANSPORT_HELLO > 2
4722 my_id = GNUNET_strdup(GNUNET_i2s(plugin->env.my_identity));
4723 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4724 "%s: Starting validation of `%s' message for `%4s' via '%s' of size %u\n",
4727 GNUNET_i2s (&target),
4729 GNUNET_HELLO_size(hello));
4733 chvc = GNUNET_malloc (sizeof (struct CheckHelloValidatedContext) + hsize);
4735 chvc->hello = (const struct GNUNET_HELLO_Message *) &chvc[1];
4736 memcpy (&chvc[1], hello, hsize);
4737 GNUNET_CONTAINER_DLL_insert (chvc_head,
4740 /* finally, check if HELLO was previously validated
4741 (continuation will then schedule actual validation) */
4742 GNUNET_STATISTICS_update (stats,
4743 gettext_noop ("# peerinfo process hello iterate requests"),
4746 GNUNET_STATISTICS_update (stats,
4747 gettext_noop ("# outstanding peerinfo iterate requests"),
4750 chvc->piter = GNUNET_PEERINFO_iterate (peerinfo,
4752 HELLO_VERIFICATION_TIMEOUT,
4753 &check_hello_validated, chvc);
4759 * The peer specified by the given neighbour has timed-out or a plugin
4760 * has disconnected. We may either need to do nothing (other plugins
4761 * still up), or trigger a full disconnect and clean up. This
4762 * function updates our state and does the necessary notifications.
4763 * Also notifies our clients that the neighbour is now officially
4766 * @param n the neighbour list entry for the peer
4767 * @param check GNUNET_YES to check if ALL addresses for this peer
4768 * are gone, GNUNET_NO to force a disconnect of the peer
4769 * regardless of whether other addresses exist.
4772 disconnect_neighbour (struct NeighbourList *n, int check)
4774 struct ReadyList *rpos;
4775 struct NeighbourList *npos;
4776 struct NeighbourList *nprev;
4777 struct MessageQueue *mq;
4778 struct ForeignAddressList *peer_addresses;
4779 struct ForeignAddressList *peer_pos;
4781 if (GNUNET_YES == check)
4784 while (NULL != rpos)
4786 peer_addresses = rpos->addresses;
4787 while (peer_addresses != NULL)
4789 if (GNUNET_YES == peer_addresses->connected)
4791 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4792 "NOT Disconnecting from `%4s', still have live addresses!\n",
4793 GNUNET_i2s (&n->id));
4794 return; /* still connected */
4796 peer_addresses = peer_addresses->next;
4802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4803 "Disconnecting from `%4s'\n",
4804 GNUNET_i2s (&n->id));
4806 /* remove n from neighbours list */
4809 while ((npos != NULL) && (npos != n))
4814 GNUNET_assert (npos != NULL);
4816 neighbours = n->next;
4818 nprev->next = n->next;
4820 /* notify all clients about disconnect */
4821 if (GNUNET_YES == n->received_pong)
4822 notify_clients_disconnect (&n->id);
4824 /* clean up all plugins, cancel connections and pending transmissions */
4825 while (NULL != (rpos = n->plugins))
4827 n->plugins = rpos->next;
4828 rpos->plugin->api->disconnect (rpos->plugin->api->cls, &n->id);
4829 while (rpos->addresses != NULL)
4831 peer_pos = rpos->addresses;
4832 rpos->addresses = peer_pos->next;
4833 if (peer_pos->connected == GNUNET_YES)
4834 GNUNET_STATISTICS_update (stats,
4835 gettext_noop ("# connected addresses"),
4838 if (GNUNET_YES == peer_pos->validated)
4839 GNUNET_STATISTICS_update (stats,
4840 gettext_noop ("# peer addresses considered valid"),
4843 if (GNUNET_SCHEDULER_NO_TASK != peer_pos->revalidate_task)
4845 GNUNET_SCHEDULER_cancel (peer_pos->revalidate_task);
4846 peer_pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
4848 GNUNET_free(peer_pos->ressources);
4849 peer_pos->ressources = NULL;
4850 GNUNET_free(peer_pos->quality);
4851 peer_pos->ressources = NULL;
4852 GNUNET_free(peer_pos);
4857 /* free all messages on the queue */
4858 while (NULL != (mq = n->messages_head))
4860 GNUNET_STATISTICS_update (stats,
4861 gettext_noop ("# bytes in message queue for other peers"),
4862 - (int64_t) mq->message_buf_size,
4864 GNUNET_STATISTICS_update (stats,
4865 gettext_noop ("# bytes discarded due to disconnect"),
4866 mq->message_buf_size,
4868 GNUNET_CONTAINER_DLL_remove (n->messages_head,
4871 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
4873 sizeof(struct GNUNET_PeerIdentity)));
4876 if (n->timeout_task != GNUNET_SCHEDULER_NO_TASK)
4878 GNUNET_SCHEDULER_cancel (n->timeout_task);
4879 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4881 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4883 GNUNET_SCHEDULER_cancel (n->retry_task);
4884 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4886 if (n->piter != NULL)
4888 GNUNET_PEERINFO_iterate_cancel (n->piter);
4889 GNUNET_STATISTICS_update (stats,
4890 gettext_noop ("# outstanding peerinfo iterate requests"),
4895 /* finally, free n itself */
4896 GNUNET_STATISTICS_update (stats,
4897 gettext_noop ("# active neighbours"),
4900 GNUNET_free_non_null (n->pre_connect_message_buffer);
4906 * We have received a PING message from someone. Need to send a PONG message
4907 * in response to the peer by any means necessary.
4910 handle_ping(void *cls, const struct GNUNET_MessageHeader *message,
4911 const struct GNUNET_PeerIdentity *peer,
4912 struct Session *session,
4913 const char *sender_address,
4914 uint16_t sender_address_len)
4916 struct TransportPlugin *plugin = cls;
4917 struct SessionHeader *session_header = (struct SessionHeader*) session;
4918 struct TransportPingMessage *ping;
4919 struct TransportPongMessage *pong;
4920 struct NeighbourList *n;
4921 struct ReadyList *rl;
4922 struct ForeignAddressList *fal;
4923 struct OwnAddressList *oal;
4928 if (ntohs (message->size) < sizeof (struct TransportPingMessage))
4930 GNUNET_break_op (0);
4931 return GNUNET_SYSERR;
4934 ping = (struct TransportPingMessage *) message;
4935 if (0 != memcmp (&ping->target,
4936 plugin->env.my_identity,
4937 sizeof (struct GNUNET_PeerIdentity)))
4939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4940 _("Received `%s' message from `%s' destined for `%s' which is not me!\n"),
4942 (sender_address != NULL)
4943 ? a2s (plugin->short_name,
4944 (const struct sockaddr *)sender_address,
4947 GNUNET_i2s (&ping->target));
4948 return GNUNET_SYSERR;
4951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4952 "Processing `%s' from `%s'\n",
4954 (sender_address != NULL)
4955 ? a2s (plugin->short_name,
4956 (const struct sockaddr *)sender_address,
4960 GNUNET_STATISTICS_update (stats,
4961 gettext_noop ("# PING messages received"),
4964 addr = (const char*) &ping[1];
4965 alen = ntohs (message->size) - sizeof (struct TransportPingMessage);
4966 slen = strlen (plugin->short_name) + 1;
4969 /* peer wants to confirm that we have an outbound connection to him */
4970 if (session == NULL)
4972 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4973 _("Refusing to create PONG since I do not have a session with `%s'.\n"),
4975 return GNUNET_SYSERR;
4977 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + sender_address_len + slen);
4978 pong->header.size = htons (sizeof (struct TransportPongMessage) + sender_address_len + slen);
4979 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
4980 pong->purpose.size =
4981 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
4983 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
4984 sizeof (struct GNUNET_PeerIdentity) + sender_address_len + slen);
4985 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING);
4986 pong->challenge = ping->challenge;
4987 pong->addrlen = htonl(sender_address_len + slen);
4990 sizeof(struct GNUNET_PeerIdentity));
4994 if ((sender_address!=NULL) && (sender_address_len > 0))
4995 memcpy (&((char*)&pong[1])[slen],
4997 sender_address_len);
4998 if (GNUNET_TIME_absolute_get_remaining (session_header->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4)
5000 /* create / update cached sig */
5002 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5003 "Creating PONG signature to indicate active connection.\n");
5005 session_header->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5006 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5007 GNUNET_assert (GNUNET_OK ==
5008 GNUNET_CRYPTO_rsa_sign (my_private_key,
5010 &session_header->pong_signature));
5014 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5016 memcpy (&pong->signature,
5017 &session_header->pong_signature,
5018 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5024 /* peer wants to confirm that this is one of our addresses */
5028 plugin->api->check_address (plugin->api->cls,
5032 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5033 _("Not confirming PING with address `%s' since I cannot confirm having this address.\n"),
5034 a2s (plugin->short_name,
5039 oal = plugin->addresses;
5042 if ( (oal->addrlen == alen) &&
5049 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + alen + slen);
5050 pong->header.size = htons (sizeof (struct TransportPongMessage) + alen + slen);
5051 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5052 pong->purpose.size =
5053 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5055 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5056 sizeof (struct GNUNET_PeerIdentity) + alen + slen);
5057 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN);
5058 pong->challenge = ping->challenge;
5059 pong->addrlen = htonl(alen + slen);
5062 sizeof(struct GNUNET_PeerIdentity));
5063 memcpy (&pong[1], plugin->short_name, slen);
5064 memcpy (&((char*)&pong[1])[slen], addr, alen);
5065 if ( (oal != NULL) &&
5066 (GNUNET_TIME_absolute_get_remaining (oal->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4) )
5068 /* create / update cached sig */
5070 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5071 "Creating PONG signature to indicate ownership.\n");
5073 oal->pong_sig_expires = GNUNET_TIME_absolute_min (oal->expires,
5074 GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5075 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5076 GNUNET_assert (GNUNET_OK ==
5077 GNUNET_CRYPTO_rsa_sign (my_private_key,
5079 &oal->pong_signature));
5080 memcpy (&pong->signature,
5081 &oal->pong_signature,
5082 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5084 else if (oal == NULL)
5086 /* not using cache (typically DV-only) */
5087 pong->expiration = GNUNET_TIME_absolute_hton (GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5088 GNUNET_assert (GNUNET_OK ==
5089 GNUNET_CRYPTO_rsa_sign (my_private_key,
5095 /* can used cached version */
5096 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5097 memcpy (&pong->signature,
5098 &oal->pong_signature,
5099 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5102 n = find_neighbour(peer);
5103 GNUNET_assert (n != NULL);
5104 /* first try reliable response transmission */
5108 fal = rl->addresses;
5111 if (-1 != rl->plugin->api->send (rl->plugin->api->cls,
5114 ntohs (pong->header.size),
5115 TRANSPORT_PONG_PRIORITY,
5116 HELLO_VERIFICATION_TIMEOUT,
5124 GNUNET_STATISTICS_update (stats,
5125 gettext_noop ("# PONGs unicast via reliable transport"),
5135 /* no reliable method found, do multicast */
5136 GNUNET_STATISTICS_update (stats,
5137 gettext_noop ("# PONGs multicast to all available addresses"),
5143 fal = rl->addresses;
5146 transmit_to_peer(NULL, fal,
5147 TRANSPORT_PONG_PRIORITY,
5148 HELLO_VERIFICATION_TIMEOUT,
5150 ntohs(pong->header.size),
5166 * Function called by the plugin for each received message.
5167 * Update data volumes, possibly notify plugins about
5168 * reducing the rate at which they read from the socket
5169 * and generally forward to our receive callback.
5171 * @param cls the "struct TransportPlugin *" we gave to the plugin
5172 * @param peer (claimed) identity of the other peer
5173 * @param message the message, NULL if we only care about
5174 * learning about the delay until we should receive again
5175 * @param ats_data information for automatic transport selection
5176 * @param ats_count number of elements in ats not including 0-terminator
5177 * @param session identifier used for this session (can be NULL)
5178 * @param sender_address binary address of the sender (if observed)
5179 * @param sender_address_len number of bytes in sender_address
5180 * @return how long in ms the plugin should wait until receiving more data
5181 * (plugins that do not support this, can ignore the return value)
5183 static struct GNUNET_TIME_Relative
5184 plugin_env_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
5185 const struct GNUNET_MessageHeader *message,
5186 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
5188 struct Session *session,
5189 const char *sender_address,
5190 uint16_t sender_address_len)
5192 struct TransportPlugin *plugin = cls;
5193 struct ReadyList *service_context;
5194 struct ForeignAddressList *peer_address;
5196 struct NeighbourList *n;
5197 struct GNUNET_TIME_Relative ret;
5198 if (is_blacklisted (peer, plugin))
5199 return GNUNET_TIME_UNIT_FOREVER_REL;
5203 n = find_neighbour (peer);
5205 n = setup_new_neighbour (peer, GNUNET_YES);
5206 service_context = n->plugins;
5207 while ((service_context != NULL) && (plugin != service_context->plugin))
5208 service_context = service_context->next;
5209 GNUNET_assert ((plugin->api->send == NULL) || (service_context != NULL));
5210 peer_address = NULL;
5213 for (c=0; c<ats_count; c++)
5215 if (ntohl(ats_data[c].type) == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
5217 distance = ntohl(ats_data[c].value);
5221 /* notify ATS about incoming data */
5222 //ats_notify_ats_data(peer, ats_data);
5225 if (message != NULL)
5227 if ( (session != NULL) ||
5228 (sender_address != NULL) )
5229 peer_address = add_peer_address (n,
5233 sender_address_len);
5234 if (peer_address != NULL)
5237 update_addr_ats(peer_address, ats_data, ats_count);
5238 update_addr_value(peer_address, distance, GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5240 peer_address->distance = distance;
5241 if (GNUNET_YES == peer_address->validated)
5242 mark_address_connected (peer_address);
5243 peer_address->timeout
5245 GNUNET_TIME_relative_to_absolute
5246 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5247 schedule_next_ping (peer_address);
5249 /* update traffic received amount ... */
5250 msize = ntohs (message->size);
5252 GNUNET_STATISTICS_update (stats,
5253 gettext_noop ("# bytes received from other peers"),
5256 n->distance = distance;
5258 GNUNET_TIME_relative_to_absolute
5259 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5260 GNUNET_SCHEDULER_cancel (n->timeout_task);
5262 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
5263 &neighbour_timeout_task, n);
5264 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
5266 /* dropping message due to frequent inbound volume violations! */
5267 GNUNET_log (GNUNET_ERROR_TYPE_WARNING |
5268 GNUNET_ERROR_TYPE_BULK,
5270 ("Dropping incoming message due to repeated bandwidth quota (%u b/s) violations (total of %u).\n"),
5271 n->in_tracker.available_bytes_per_s__,
5272 n->quota_violation_count);
5273 GNUNET_STATISTICS_update (stats,
5274 gettext_noop ("# bandwidth quota violations by other peers"),
5277 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
5279 if ((ntohs(message->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_ATS) &&
5280 (ntohs(message->size) == (sizeof (struct GNUNET_MessageHeader) + sizeof (uint32_t))))
5282 uint32_t value = ntohl(*((uint32_t *) &message[1]));
5283 //GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "GNUNET_MESSAGE_TYPE_TRANSPORT_ATS: %i \n", value);
5284 /* Force ressource and quality update */
5287 ats->modified_resources = GNUNET_YES;
5288 ats->modified_quality = GNUNET_YES;
5290 /* Force cost update */
5292 ats->modified_resources = GNUNET_YES;
5293 /* Force quality update */
5295 ats->modified_quality = GNUNET_YES;
5296 /* Force full rebuild */
5298 ats->modified_addr = GNUNET_YES;
5302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5303 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
5304 ntohs (message->type),
5305 ntohs (message->size),
5308 switch (ntohs (message->type))
5310 case GNUNET_MESSAGE_TYPE_HELLO:
5311 GNUNET_STATISTICS_update (stats,
5312 gettext_noop ("# HELLO messages received from other peers"),
5315 process_hello (plugin, message);
5317 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
5318 handle_ping (plugin, message, peer, session, sender_address, sender_address_len);
5320 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
5321 handle_pong (plugin, message, peer, sender_address, sender_address_len);
5323 case GNUNET_MESSAGE_TYPE_TRANSPORT_ATS:
5326 handle_payload_message (message, n);
5330 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 0);
5331 if (ret.rel_value > 0)
5333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5334 "Throttling read (%llu bytes excess at %u b/s), waiting %llums before reading more.\n",
5335 (unsigned long long) n->in_tracker.consumption_since_last_update__,
5336 (unsigned int) n->in_tracker.available_bytes_per_s__,
5337 (unsigned long long) ret.rel_value);
5338 GNUNET_STATISTICS_update (stats,
5339 gettext_noop ("# ms throttling suggested"),
5340 (int64_t) ret.rel_value,
5347 * Handle START-message. This is the first message sent to us
5348 * by any client which causes us to add it to our list.
5350 * @param cls closure (always NULL)
5351 * @param client identification of the client
5352 * @param message the actual message
5355 handle_start (void *cls,
5356 struct GNUNET_SERVER_Client *client,
5357 const struct GNUNET_MessageHeader *message)
5359 const struct StartMessage *start;
5360 struct TransportClient *c;
5361 struct ConnectInfoMessage * cim;
5362 struct NeighbourList *n;
5366 start = (const struct StartMessage*) message;
5368 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5369 "Received `%s' request from client\n", "START");
5374 if (c->client == client)
5376 /* client already on our list! */
5378 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5383 if ( (GNUNET_NO != ntohl (start->do_check)) &&
5384 (0 != memcmp (&start->self,
5386 sizeof (struct GNUNET_PeerIdentity))) )
5388 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5389 _("Rejecting control connection from peer `%s', which is not me!\n"),
5390 GNUNET_i2s (&start->self));
5391 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5394 c = GNUNET_malloc (sizeof (struct TransportClient));
5398 if (our_hello != NULL)
5401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5402 "Sending our own `%s' to new client\n", "HELLO");
5404 transmit_to_client (c,
5405 (const struct GNUNET_MessageHeader *) our_hello,
5407 /* tell new client about all existing connections */
5409 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
5410 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
5414 cim = GNUNET_malloc (size);
5415 cim->header.size = htons (size);
5416 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
5417 cim->ats_count = htonl(ats_count);
5418 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
5419 (&(cim->ats))[2].value = htonl (0);
5423 if (GNUNET_YES == n->received_pong)
5425 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5426 (&(cim->ats))[0].value = htonl (n->distance);
5427 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
5428 (&(cim->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
5430 transmit_to_client (c, &cim->header, GNUNET_NO);
5436 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5441 * Handle HELLO-message.
5443 * @param cls closure (always NULL)
5444 * @param client identification of the client
5445 * @param message the actual message
5448 handle_hello (void *cls,
5449 struct GNUNET_SERVER_Client *client,
5450 const struct GNUNET_MessageHeader *message)
5454 GNUNET_STATISTICS_update (stats,
5455 gettext_noop ("# HELLOs received from clients"),
5458 ret = process_hello (NULL, message);
5459 GNUNET_SERVER_receive_done (client, ret);
5464 * Closure for 'transmit_client_message'; followed by
5465 * 'msize' bytes of the actual message.
5467 struct TransmitClientMessageContext
5470 * Client on whom's behalf we are sending.
5472 struct GNUNET_SERVER_Client *client;
5475 * Timeout for the transmission.
5477 struct GNUNET_TIME_Absolute timeout;
5485 * Size of the message in bytes.
5492 * Schedule transmission of a message we got from a client to a peer.
5494 * @param cls the 'struct TransmitClientMessageContext*'
5495 * @param n destination, or NULL on error (in that case, drop the message)
5498 transmit_client_message (void *cls,
5499 struct NeighbourList *n)
5501 struct TransmitClientMessageContext *tcmc = cls;
5502 struct TransportClient *tc;
5505 while ((tc != NULL) && (tc->client != tcmc->client))
5510 transmit_to_peer (tc, NULL, tcmc->priority,
5511 GNUNET_TIME_absolute_get_remaining (tcmc->timeout),
5513 tcmc->msize, GNUNET_NO, n);
5515 GNUNET_SERVER_receive_done (tcmc->client, GNUNET_OK);
5516 GNUNET_SERVER_client_drop (tcmc->client);
5522 * Handle SEND-message.
5524 * @param cls closure (always NULL)
5525 * @param client identification of the client
5526 * @param message the actual message
5529 handle_send (void *cls,
5530 struct GNUNET_SERVER_Client *client,
5531 const struct GNUNET_MessageHeader *message)
5533 const struct OutboundMessage *obm;
5534 const struct GNUNET_MessageHeader *obmm;
5535 struct TransmitClientMessageContext *tcmc;
5539 size = ntohs (message->size);
5541 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
5544 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5547 GNUNET_STATISTICS_update (stats,
5548 gettext_noop ("# payload received for other peers"),
5551 obm = (const struct OutboundMessage *) message;
5552 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
5553 msize = size - sizeof (struct OutboundMessage);
5555 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5556 "Received `%s' request from client with target `%4s' and message of type %u and size %u\n",
5557 "SEND", GNUNET_i2s (&obm->peer),
5561 tcmc = GNUNET_malloc (sizeof (struct TransmitClientMessageContext) + msize);
5562 tcmc->client = client;
5563 tcmc->priority = ntohl (obm->priority);
5564 tcmc->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_ntoh (obm->timeout));
5565 tcmc->msize = msize;
5566 /* FIXME: this memcpy can be up to 7% of our total runtime */
5567 memcpy (&tcmc[1], obmm, msize);
5568 GNUNET_SERVER_client_keep (client);
5569 setup_peer_check_blacklist (&obm->peer, GNUNET_YES,
5570 &transmit_client_message,
5576 * Handle request connect message
5578 * @param cls closure (always NULL)
5579 * @param client identification of the client
5580 * @param message the actual message
5583 handle_request_connect (void *cls,
5584 struct GNUNET_SERVER_Client *client,
5585 const struct GNUNET_MessageHeader *message)
5587 const struct TransportRequestConnectMessage *trcm =
5588 (const struct TransportRequestConnectMessage *) message;
5590 GNUNET_STATISTICS_update (stats,
5591 gettext_noop ("# REQUEST CONNECT messages received"),
5594 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Received a request connect message for peer %s\n", GNUNET_i2s(&trcm->peer));
5595 setup_peer_check_blacklist (&trcm->peer, GNUNET_YES,
5597 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5601 * Handle SET_QUOTA-message.
5603 * @param cls closure (always NULL)
5604 * @param client identification of the client
5605 * @param message the actual message
5608 handle_set_quota (void *cls,
5609 struct GNUNET_SERVER_Client *client,
5610 const struct GNUNET_MessageHeader *message)
5612 const struct QuotaSetMessage *qsm =
5613 (const struct QuotaSetMessage *) message;
5614 struct NeighbourList *n;
5616 GNUNET_STATISTICS_update (stats,
5617 gettext_noop ("# SET QUOTA messages received"),
5620 n = find_neighbour (&qsm->peer);
5623 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5624 GNUNET_STATISTICS_update (stats,
5625 gettext_noop ("# SET QUOTA messages ignored (no such peer)"),
5631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5632 "Received `%s' request (new quota %u, old quota %u) from client for peer `%4s'\n",
5634 (unsigned int) ntohl (qsm->quota.value__),
5635 (unsigned int) n->in_tracker.available_bytes_per_s__,
5636 GNUNET_i2s (&qsm->peer));
5638 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker,
5640 if (0 == ntohl (qsm->quota.value__))
5642 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5643 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&n->id),
5645 disconnect_neighbour (n, GNUNET_NO);
5647 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5652 * Take the given address and append it to the set of results sent back to
5655 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
5656 * @param address the resolved name, NULL to indicate the last response
5659 transmit_address_to_client (void *cls, const char *address)
5661 struct GNUNET_SERVER_TransmitContext *tc = cls;
5664 if (NULL == address)
5667 slen = strlen (address) + 1;
5669 GNUNET_SERVER_transmit_context_append_data (tc, address, slen,
5670 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5671 if (NULL == address)
5672 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
5677 * Handle AddressLookup-message.
5679 * @param cls closure (always NULL)
5680 * @param client identification of the client
5681 * @param message the actual message
5684 handle_address_lookup (void *cls,
5685 struct GNUNET_SERVER_Client *client,
5686 const struct GNUNET_MessageHeader *message)
5688 const struct AddressLookupMessage *alum;
5689 struct TransportPlugin *lsPlugin;
5690 const char *nameTransport;
5691 const char *address;
5693 struct GNUNET_SERVER_TransmitContext *tc;
5694 struct GNUNET_TIME_Absolute timeout;
5695 struct GNUNET_TIME_Relative rtimeout;
5698 size = ntohs (message->size);
5699 if (size < sizeof (struct AddressLookupMessage))
5701 GNUNET_break_op (0);
5702 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5705 alum = (const struct AddressLookupMessage *) message;
5706 uint32_t addressLen = ntohl (alum->addrlen);
5707 if (size <= sizeof (struct AddressLookupMessage) + addressLen)
5709 GNUNET_break_op (0);
5710 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5713 address = (const char *) &alum[1];
5714 nameTransport = (const char *) &address[addressLen];
5716 [size - sizeof (struct AddressLookupMessage) - addressLen - 1] != '\0')
5718 GNUNET_break_op (0);
5719 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5722 timeout = GNUNET_TIME_absolute_ntoh (alum->timeout);
5723 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5724 numeric = ntohl (alum->numeric_only);
5725 lsPlugin = find_transport (nameTransport);
5726 if (NULL == lsPlugin)
5728 tc = GNUNET_SERVER_transmit_context_create (client);
5729 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5730 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5731 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
5734 tc = GNUNET_SERVER_transmit_context_create (client);
5735 lsPlugin->api->address_pretty_printer (lsPlugin->api->cls,
5737 address, addressLen,
5740 &transmit_address_to_client, tc);
5745 * Setup the environment for this plugin.
5748 create_environment (struct TransportPlugin *plug)
5750 plug->env.cfg = cfg;
5751 plug->env.my_identity = &my_identity;
5752 plug->env.our_hello = &our_hello;
5753 plug->env.cls = plug;
5754 plug->env.receive = &plugin_env_receive;
5755 plug->env.notify_address = &plugin_env_notify_address;
5756 plug->env.session_end = &plugin_env_session_end;
5757 plug->env.max_connections = max_connect_per_transport;
5758 plug->env.stats = stats;
5763 * Start the specified transport (load the plugin).
5766 start_transport (struct GNUNET_SERVER_Handle *server,
5769 struct TransportPlugin *plug;
5772 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5773 _("Loading `%s' transport plugin\n"), name);
5774 GNUNET_asprintf (&libname, "libgnunet_plugin_transport_%s", name);
5775 plug = GNUNET_malloc (sizeof (struct TransportPlugin));
5776 create_environment (plug);
5777 plug->short_name = GNUNET_strdup (name);
5778 plug->lib_name = libname;
5779 plug->next = plugins;
5781 plug->api = GNUNET_PLUGIN_load (libname, &plug->env);
5782 if (plug->api == NULL)
5784 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5785 _("Failed to load transport plugin for `%s'\n"), name);
5786 GNUNET_free (plug->short_name);
5787 plugins = plug->next;
5788 GNUNET_free (libname);
5795 * Called whenever a client is disconnected. Frees our
5796 * resources associated with that client.
5798 * @param cls closure
5799 * @param client identification of the client
5802 client_disconnect_notification (void *cls,
5803 struct GNUNET_SERVER_Client *client)
5805 struct TransportClient *pos;
5806 struct TransportClient *prev;
5807 struct ClientMessageQueueEntry *mqe;
5808 struct Blacklisters *bl;
5809 struct BlacklistCheck *bc;
5814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
5815 "Client disconnected, cleaning up.\n");
5817 /* clean up blacklister */
5821 if (bl->client == client)
5826 if (bc->bl_pos == bl)
5828 bc->bl_pos = bl->next;
5831 GNUNET_CONNECTION_notify_transmit_ready_cancel (bc->th);
5834 if (bc->task == GNUNET_SCHEDULER_NO_TASK)
5835 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
5841 GNUNET_CONTAINER_DLL_remove (bl_head,
5844 GNUNET_SERVER_client_drop (bl->client);
5850 /* clean up 'normal' clients */
5853 while ((pos != NULL) && (pos->client != client))
5860 while (NULL != (mqe = pos->message_queue_head))
5862 GNUNET_CONTAINER_DLL_remove (pos->message_queue_head,
5863 pos->message_queue_tail,
5865 pos->message_count--;
5869 clients = pos->next;
5871 prev->next = pos->next;
5872 if (GNUNET_YES == pos->tcs_pending)
5877 if (pos->th != NULL)
5879 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
5882 GNUNET_break (0 == pos->message_count);
5888 * Function called when the service shuts down. Unloads our plugins
5889 * and cancels pending validations.
5891 * @param cls closure, unused
5892 * @param tc task context (unused)
5895 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5897 struct TransportPlugin *plug;
5898 struct OwnAddressList *al;
5899 struct CheckHelloValidatedContext *chvc;
5901 while (neighbours != NULL)
5903 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5904 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&neighbours->id),
5906 disconnect_neighbour (neighbours, GNUNET_NO);
5909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5910 "Transport service is unloading plugins...\n");
5912 while (NULL != (plug = plugins))
5914 plugins = plug->next;
5915 if (plug->address_update_task != GNUNET_SCHEDULER_NO_TASK)
5917 GNUNET_SCHEDULER_cancel (plug->address_update_task);
5918 plug->address_update_task = GNUNET_SCHEDULER_NO_TASK;
5920 GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
5921 GNUNET_free (plug->lib_name);
5922 GNUNET_free (plug->short_name);
5923 while (NULL != (al = plug->addresses))
5925 plug->addresses = al->next;
5930 if (my_private_key != NULL)
5931 GNUNET_CRYPTO_rsa_key_free (my_private_key);
5932 GNUNET_free_non_null (our_hello);
5934 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
5937 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
5938 validation_map = NULL;
5942 /* free 'chvc' data structure */
5943 while (NULL != (chvc = chvc_head))
5945 chvc_head = chvc->next;
5946 if (chvc->piter != NULL)
5948 GNUNET_PEERINFO_iterate_cancel (chvc->piter);
5949 GNUNET_STATISTICS_update (stats,
5950 gettext_noop ("# outstanding peerinfo iterate requests"),
5956 GNUNET_assert (chvc->ve_count == 0);
5963 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
5966 if (peerinfo != NULL)
5968 GNUNET_PEERINFO_disconnect (peerinfo);
5971 /* Can we assume those are gone by now, or do we need to clean up
5973 GNUNET_break (bl_head == NULL);
5974 GNUNET_break (bc_head == NULL);
5978 static int ats_evaluate_results (int result, int solution, char * problem)
5980 int cont = GNUNET_NO;
5981 int error_kind = GNUNET_ERROR_TYPE_DEBUG;
5983 error_kind = GNUNET_ERROR_TYPE_ERROR;
5987 case GLP_ESTOP : /* search terminated by application */
5988 GNUNET_log (error_kind, "%s , Search terminated by application ", problem);
5990 case GLP_EITLIM : /* iteration limit exceeded */
5991 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Iteration limit exceeded ", problem);
5994 case GLP_ETMLIM : /* time limit exceeded */
5995 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Time limit exceeded ", problem);
5997 case GLP_ENOPFS : /* no primal feasible solution */
5998 case GLP_ENODFS : /* no dual feasible solution */
5999 GNUNET_log (error_kind, "%s No feasible solution", problem);
6002 case GLP_EBADB : /* invalid basis */
6003 case GLP_ESING : /* singular matrix */
6004 case GLP_ECOND : /* ill-conditioned matrix */
6005 case GLP_EBOUND : /* invalid bounds */
6006 case GLP_EFAIL : /* solver failed */
6007 case GLP_EOBJLL : /* objective lower limit reached */
6008 case GLP_EOBJUL : /* objective upper limit reached */
6009 case GLP_EROOT : /* root LP optimum not provided */
6010 GNUNET_log (error_kind, "%s Invalid Input data: %i\n", problem, result);
6014 GNUNET_log (error_kind, "%s Problem has been solved\n", problem);
6020 GNUNET_log (error_kind, "%s solution is undefined\n", problem);
6023 GNUNET_log (error_kind, "%s solution is optimal\n", problem);
6027 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"));
6031 GNUNET_log (error_kind, "%s problem has no %sfeasible solution\n", problem, (0==strcmp(problem,"LP")?"":"integer "));
6034 GNUNET_log (error_kind, "%s problem is infeasible \n", problem);
6037 GNUNET_log (error_kind, "%s problem is unbounded \n", problem);
6044 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)
6053 glp_init_smcp(&opt_lp);
6055 opt_lp.msg_lev = GLP_MSG_ALL;
6057 opt_lp.msg_lev = GLP_MSG_OFF;
6060 // setting iteration limit
6061 opt_lp.it_lim = max_it;
6063 opt_lp.tm_lim = max_dur;
6065 if (ats->modified_addr == GNUNET_YES)
6066 opt_lp.presolve = GLP_ON;
6067 result = glp_simplex(ats->prob, &opt_lp);
6068 lp_solution = glp_get_status (ats->prob);
6070 if ((result == GLP_ETMLIM) || (result == GLP_ETMLIM))
6072 ats->stat.valid = GNUNET_NO;
6073 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ATS exceeded time or iteration limit!\n");
6077 if (ats_evaluate_results(result, lp_solution, "LP") == GNUNET_YES)
6079 stat->valid = GNUNET_YES;
6083 ats->simplex_rerun_required = GNUNET_YES;
6084 opt_lp.presolve = GLP_ON;
6085 result = glp_simplex(ats->prob, &opt_lp);
6086 lp_solution = glp_get_status (ats->prob);
6088 // TODO: Remove if this does not appear until release
6089 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "EXECUTED SIMPLEX WITH PRESOLVER! %i", lp_solution);
6091 if (ats_evaluate_results(result, lp_solution, "LP") != GNUNET_YES)
6093 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "After execution simplex with presolver: STILL INVALID!\n");
6095 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);
6096 glp_write_lp (ats->prob, NULL, filename);
6097 GNUNET_free (filename);
6098 stat->valid = GNUNET_NO;
6101 stat->valid = GNUNET_YES;
6106 glp_init_iocp(&opt_mlp);
6108 opt_mlp.tm_lim = max_dur;
6111 opt_mlp.msg_lev = GLP_MSG_ALL;
6113 opt_mlp.msg_lev = GLP_MSG_OFF;
6116 result = glp_intopt (ats->prob, &opt_mlp);
6117 mlp_solution = glp_mip_status (ats->prob);
6118 stat->solution = mlp_solution;
6120 if (ats_evaluate_results(result, mlp_solution, "MLP") == GNUNET_YES)
6122 stat->valid = GNUNET_YES;
6126 // TODO: Remove if this does not appear until release
6127 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "MLP SOLUTION INVALID: %i\n", lp_solution);
6128 stat->valid = GNUNET_NO;
6133 int error = GNUNET_NO;
6135 struct ATS_mechanism *t = NULL;
6136 for (c=1; c<= (c_peers); c++ )
6139 t = peers[c].m_head;
6142 bw = glp_get_col_prim(prob, t->col_index);
6146 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);
6148 if (check ==GNUNET_YES)
6150 glp_write_sol(prob, "invalid_solution.mlp");
6151 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid solution, check invalid_solution.mlp");
6152 GNUNET_STATISTICS_update (stats, "ATS invalid solutions", 1, GNUNET_NO);
6155 if (check ==GNUNET_NO)
6163 if (glp_get_col_prim(ats->prob,2*c_mechs+1) != 1)
6166 for (c=1; c<= available_quality_metrics; c++ )
6168 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));
6170 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));
6171 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));
6172 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));
6173 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "objective value: %f\n", glp_mip_obj_val(ats->prob));
6178 static void ats_delete_problem ()
6182 for (c=0; c< (ats->stat).c_mechs; c++)
6183 GNUNET_free_non_null (ats->mechanisms[c].rc);
6185 if (ats->mechanisms!=NULL)
6187 GNUNET_free(ats->mechanisms);
6188 ats->mechanisms = NULL;
6190 if (ats->peers!=NULL)
6192 GNUNET_free(ats->peers);
6196 if (ats->prob != NULL)
6198 glp_delete_prob(ats->prob);
6202 ats->stat.begin_cr = GNUNET_SYSERR;
6203 ats->stat.begin_qm = GNUNET_SYSERR;
6204 ats->stat.c_mechs = 0;
6205 ats->stat.c_peers = 0;
6206 ats->stat.end_cr = GNUNET_SYSERR;
6207 ats->stat.end_qm = GNUNET_SYSERR;
6208 ats->stat.solution = GNUNET_SYSERR;
6209 ats->stat.valid = GNUNET_SYSERR;
6213 static void ats_update_problem_qm ()
6218 int c_q_metrics = available_quality_metrics;
6220 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6221 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6223 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6225 row_index = ats->stat.begin_qm;
6227 for (c=1; c <= c_q_metrics; c++)
6232 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6235 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6236 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6238 ja[array_index] = c2;
6240 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
6243 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6244 if (v1 < 1) v0 = 0.1;
6245 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6246 if (v1 < 1) v0 = 0.1;
6247 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6248 if (v1 < 1) v0 = 0.1;
6249 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
6252 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
6255 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6257 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6259 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6261 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
6263 value = (double) 10 / value;
6267 ar[array_index] = (ats->mechanisms[c2].peer->f) * value;
6269 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]);
6273 ja[array_index] = ats->stat.col_qm + c - 1;
6274 ar[array_index] = -1;
6277 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6279 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6285 GNUNET_free_non_null (ja);
6286 GNUNET_free_non_null (ar);
6290 static void ats_update_problem_cr ()
6296 double ct_max, ct_min;
6298 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6299 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6301 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6302 row_index = ats->stat.begin_cr;
6304 for (c=0; c<available_ressources; c++)
6306 ct_max = ressources[c].c_max;
6307 ct_min = ressources[c].c_min;
6309 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
6311 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
6313 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6316 ja[array_index] = c2;
6317 value = ats->mechanisms[c2].addr->ressources[c].c;
6318 ar[array_index] = value;
6320 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6324 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6330 GNUNET_free_non_null (ja);
6331 GNUNET_free_non_null (ar);
6336 static void ats_update_problem_qm_TEST ()
6341 int old_ja[ats->stat.c_mechs + 2];
6342 double old_ar[ats->stat.c_mechs + 2];
6346 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6347 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6349 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics TEST\n");
6351 if (ats->stat.begin_qm >0)
6352 row_index = ats->stat.begin_qm;
6357 for (c=0; c<available_quality_metrics; c++)
6360 c_old = glp_get_mat_row (ats->prob, row_index, old_ja, old_ar);
6362 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6364 for (c2=1; c2<=c_old; c2++)
6366 ja[c2] = old_ja[c2];
6367 if ((changed < 3) && (c2>2) && (old_ar[c2] != -1))
6369 ar[c2] = old_ar[c2] + 5 - changed;
6373 ar[c2] = old_ar[c2];
6375 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]);
6378 glp_set_mat_row (ats->prob, row_index, c_old, ja, ar);
6383 GNUNET_free_non_null (ja);
6384 GNUNET_free_non_null (ar);
6389 /** solve the bandwidth distribution problem
6390 * @param max_it maximum iterations
6391 * @param max_dur maximum duration in ms
6392 * @param D weight for diversity
6393 * @param U weight for utility
6394 * @param R weight for relativity
6395 * @param v_b_min minimal bandwidth per peer
6396 * @param v_n_min minimum number of connections
6397 * @param stat result struct
6398 * @return GNUNET_SYSERR if glpk is not available, number of mechanisms used
6400 static int ats_create_problem (double D, double U, double R, int v_b_min, int v_n_min, struct ATS_stat *stat)
6402 if (ats->prob != NULL)
6403 glp_delete_prob(ats->prob);
6405 ats->prob = glp_create_prob();
6411 int c_c_ressources = available_ressources;
6412 int c_q_metrics = available_quality_metrics;
6414 double M = VERY_BIG_DOUBLE_VALUE;
6415 double Q[c_q_metrics+1];
6416 for (c=1; c<=c_q_metrics; c++)
6421 struct NeighbourList *next = neighbours;
6424 struct ReadyList *r_next = next->plugins;
6425 while (r_next != NULL)
6427 struct ForeignAddressList * a_next = r_next->addresses;
6428 while (a_next != NULL)
6431 a_next = a_next->next;
6433 r_next = r_next->next;
6442 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No addresses for bw distribution available\n", c_peers);
6444 stat->valid = GNUNET_NO;
6447 return GNUNET_SYSERR;
6450 ats->mechanisms = GNUNET_malloc((1+c_mechs) * sizeof (struct ATS_mechanism));
6451 ats->peers = GNUNET_malloc((1+c_peers) * sizeof (struct ATS_peer));
6453 struct ATS_mechanism * mechanisms = ats->mechanisms;
6454 struct ATS_peer * peers = ats->peers;
6461 peers[c_peers].peer = next->id;
6462 peers[c_peers].m_head = NULL;
6463 peers[c_peers].m_tail = NULL;
6465 peers[c_peers].f = 1.0 / c_mechs;
6467 struct ReadyList *r_next = next->plugins;
6468 while (r_next != NULL)
6470 struct ForeignAddressList * a_next = r_next->addresses;
6471 while (a_next != NULL)
6473 mechanisms[c_mechs].addr = a_next;
6474 mechanisms[c_mechs].col_index = c_mechs;
6475 mechanisms[c_mechs].peer = &peers[c_peers];
6476 mechanisms[c_mechs].next = NULL;
6477 mechanisms[c_mechs].plugin = r_next->plugin;
6479 GNUNET_CONTAINER_DLL_insert_tail(peers[c_peers].m_head, peers[c_peers].m_tail, &mechanisms[c_mechs]);
6481 a_next = a_next->next;
6483 r_next = r_next->next;
6491 if (v_n_min > c_peers)
6495 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);
6498 int size = 1 + 3 + 10 *c_mechs + c_peers + (c_q_metrics*c_mechs)+ c_q_metrics + c_c_ressources * c_mechs ;
6501 int * ia = GNUNET_malloc (size * sizeof (int));
6502 int * ja = GNUNET_malloc (size * sizeof (int));
6503 double * ar = GNUNET_malloc(size* sizeof (double));
6505 glp_set_prob_name(ats->prob, "gnunet ats bandwidth distribution");
6506 glp_set_obj_dir(ats->prob, GLP_MAX);
6508 /* adding columns */
6510 glp_add_cols(ats->prob, 2 * c_mechs);
6511 /* adding b_t cols */
6512 for (c=1; c <= c_mechs; c++)
6515 GNUNET_asprintf(&name, "p_%s_b%i",GNUNET_i2s(&(mechanisms[c].peer->peer)), c);
6516 glp_set_col_name(ats->prob, c, name);
6518 glp_set_col_bnds(ats->prob, c, GLP_LO, 0.0, 0.0);
6519 glp_set_obj_coef(ats->prob, c, 0);
6522 /* adding n_t cols */
6523 for (c=c_mechs+1; c <= 2*c_mechs; c++)
6525 GNUNET_asprintf(&name, "p_%s_n%i",GNUNET_i2s(&(mechanisms[c-c_mechs].peer->peer)),(c-c_mechs));
6526 glp_set_col_name(ats->prob, c, name);
6528 glp_set_col_bnds(ats->prob, c, GLP_DB, 0.0, 1.0);
6529 glp_set_col_kind(ats->prob, c, GLP_IV);
6530 glp_set_obj_coef(ats->prob, c, 0);
6533 /* feasibility constraints */
6534 /* Constraint 1: one address per peer*/
6536 glp_add_rows(ats->prob, c_peers);
6537 for (c=1; c<=c_peers; c++)
6539 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 1.0, 1.0);
6541 struct ATS_mechanism *m = peers[c].m_head;
6544 ia[array_index] = row_index;
6545 ja[array_index] = (c_mechs + m->col_index);
6546 ar[array_index] = 1;
6548 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6556 /* Constraint 2: only active mechanism gets bandwidth assigned */
6557 glp_add_rows(ats->prob, c_mechs);
6558 for (c=1; c<=c_mechs; c++)
6560 /* b_t - n_t * M <= 0 */
6562 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6564 glp_set_row_bnds(ats->prob, row_index, GLP_UP, 0.0, 0.0);
6566 ia[array_index] = row_index;
6567 ja[array_index] = mechanisms[c].col_index;
6568 ar[array_index] = 1;
6570 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6573 ia[array_index] = row_index;
6574 ja[array_index] = c_mechs + mechanisms[c].col_index;
6575 ar[array_index] = -M;
6577 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6583 /* Constraint 3: minimum bandwidth*/
6584 glp_add_rows(ats->prob, c_mechs);
6585 for (c=1; c<=c_mechs; c++)
6587 /* b_t - n_t * b_min <= 0 */
6589 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6591 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
6593 ia[array_index] = row_index;
6594 ja[array_index] = mechanisms[c].col_index;
6595 ar[array_index] = 1;
6597 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6600 ia[array_index] = row_index;
6601 ja[array_index] = c_mechs + mechanisms[c].col_index;
6602 ar[array_index] = -v_b_min;
6604 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6610 /* Constraint 4: max ressource capacity */
6611 /* V cr: bt * ct_r <= cr_max
6613 glp_add_rows(ats->prob, available_ressources);
6614 double ct_max = VERY_BIG_DOUBLE_VALUE;
6615 double ct_min = 0.0;
6617 stat->begin_cr = array_index;
6619 for (c=0; c<available_ressources; c++)
6621 ct_max = ressources[c].c_max;
6622 ct_min = ressources[c].c_min;
6624 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
6626 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
6628 for (c2=1; c2<=c_mechs; c2++)
6631 ia[array_index] = row_index;
6632 ja[array_index] = c2;
6633 value = mechanisms[c2].addr->ressources[c].c;
6634 ar[array_index] = value;
6636 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6642 stat->end_cr = array_index--;
6644 /* Constraint 5: min number of connections*/
6645 glp_add_rows(ats->prob, 1);
6646 for (c=1; c<=c_mechs; c++)
6648 // b_t - n_t * b_min >= 0
6650 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6652 glp_set_row_bnds(ats->prob, row_index, GLP_LO, v_n_min, 0.0);
6654 ia[array_index] = row_index;
6655 ja[array_index] = c_mechs + mechanisms[c].col_index;
6656 ar[array_index] = 1;
6658 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6664 // optimisation constraints
6668 // Constraint 6: optimize for diversity
6670 col_d = glp_add_cols(ats->prob, 1);
6671 stat->col_d = col_d;
6672 //GNUNET_assert (col_d == (2*c_mechs) + 1);
6673 glp_set_col_name(ats->prob, col_d, "d");
6674 glp_set_obj_coef(ats->prob, col_d, D);
6675 glp_set_col_bnds(ats->prob, col_d, GLP_LO, 0.0, 0.0);
6676 glp_add_rows(ats->prob, 1);
6678 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6680 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6681 for (c=1; c<=c_mechs; c++)
6683 // b_t - n_t * b_min >= 0
6684 ia[array_index] = row_index;
6685 ja[array_index] = c_mechs + mechanisms[c].col_index;
6686 ar[array_index] = 1;
6688 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6692 ia[array_index] = row_index;
6693 ja[array_index] = col_d;
6694 ar[array_index] = -1;
6696 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6702 // Constraint 7: optimize for quality
6704 col_qm = glp_add_cols(ats->prob, c_q_metrics);
6705 stat->col_qm = col_qm;
6706 //GNUNET_assert (col_qm == (2*c_mechs) + 3 + 1);
6707 for (c=0; c< c_q_metrics; c++)
6709 GNUNET_asprintf(&name, "Q_%s",qm[c].name);
6710 glp_set_col_name(ats->prob, col_qm + c, name);
6711 glp_set_col_bnds(ats->prob, col_qm + c, GLP_LO, 0.0, 0.0);
6713 glp_set_obj_coef(ats->prob, col_qm + c, Q[c]);
6715 glp_add_rows(ats->prob, available_quality_metrics);
6716 stat->begin_qm = row_index;
6717 for (c=1; c <= c_q_metrics; c++)
6720 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6723 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6724 for (c2=1; c2<=c_mechs; c2++)
6727 ia[array_index] = row_index;
6728 ja[array_index] = c2;
6729 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
6732 v0 = mechanisms[c2].addr->quality[c-1].values[0];
6733 if (v1 < 1) v0 = 0.1;
6734 v1 = mechanisms[c2].addr->quality[c-1].values[1];
6735 if (v1 < 1) v0 = 0.1;
6736 v2 = mechanisms[c2].addr->quality[c-1].values[2];
6737 if (v1 < 1) v0 = 0.1;
6738 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
6741 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
6744 v0 = mechanisms[c2].addr->quality[c-1].values[0];
6746 v1 = mechanisms[c2].addr->quality[c-1].values[1];
6748 v2 = mechanisms[c2].addr->quality[c-1].values[2];
6750 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
6752 value = (double) 10 / value;
6756 ar[array_index] = (mechanisms[c2].peer->f) * value ;
6758 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]);
6763 ia[array_index] = row_index;
6764 ja[array_index] = col_qm + c - 1;
6765 ar[array_index] = -1;
6767 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6772 stat->end_qm = row_index-1;
6774 // Constraint 8: optimize bandwidth utility
6776 col_u = glp_add_cols(ats->prob, 1);
6777 stat->col_u = col_u;
6778 //GNUNET_assert (col_u == (2*c_mechs) + 2);
6779 glp_set_col_name(ats->prob, col_u, "u");
6780 glp_set_obj_coef(ats->prob, col_u, U);
6781 glp_set_col_bnds(ats->prob, col_u, GLP_LO, 0.0, 0.0);
6782 glp_add_rows(ats->prob, 1);
6784 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6786 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6787 for (c=1; c<=c_mechs; c++)
6789 ia[array_index] = row_index;
6790 ja[array_index] = c;
6791 ar[array_index] = mechanisms[c].peer->f;
6793 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6797 ia[array_index] = row_index;
6798 ja[array_index] = col_u;
6799 ar[array_index] = -1;
6801 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6807 // Constraint 9: optimize relativity
6809 col_r = glp_add_cols(ats->prob, 1);
6810 stat->col_r = col_r;
6811 //GNUNET_assert (col_r == (2*c_mechs) + 3);
6812 glp_set_col_name(ats->prob, col_r, "r");
6813 glp_set_obj_coef(ats->prob, col_r, R);
6814 glp_set_col_bnds(ats->prob, col_r, GLP_LO, 0.0, 0.0);
6815 glp_add_rows(ats->prob, c_peers);
6816 for (c=1; c<=c_peers; c++)
6818 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
6820 struct ATS_mechanism *m = peers[c].m_head;
6823 ia[array_index] = row_index;
6824 ja[array_index] = m->col_index;
6825 ar[array_index] = 1 / mechanisms[c].peer->f;
6827 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6832 ia[array_index] = row_index;
6833 ja[array_index] = col_r;
6834 ar[array_index] = -1;
6836 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6843 /* Loading the matrix */
6844 glp_load_matrix(ats->prob, array_index-1, ia, ja, ar);
6846 stat->c_mechs = c_mechs;
6847 stat->c_peers = c_peers;
6849 stat->valid = GNUNET_YES;
6861 void ats_notify_ats_data (
6862 const struct GNUNET_PeerIdentity *peer,
6863 const struct GNUNET_TRANSPORT_ATS_Information *ats_data)
6866 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ATS_notify_ats_data: %s\n",GNUNET_i2s(peer));
6868 ats_calculate_bandwidth_distribution();
6870 #endif //END: HAVE_LIBGLPK
6873 ats_calculate_bandwidth_distribution ()
6876 struct GNUNET_TIME_Absolute start;
6877 struct GNUNET_TIME_Relative creation;
6878 struct GNUNET_TIME_Relative solving;
6879 char *text = "unmodified";
6881 struct GNUNET_TIME_Relative delta = GNUNET_TIME_absolute_get_difference (ats->last, GNUNET_TIME_absolute_get());
6882 if (delta.rel_value < ats->min_delta.rel_value)
6885 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "Minimum time between cycles not reached\n");
6891 if (INT_MAX < ats->max_exec_duration.rel_value)
6894 dur = (int) ats->max_exec_duration.rel_value;
6895 ats->simplex_rerun_required = GNUNET_NO;
6897 start = GNUNET_TIME_absolute_get();
6898 if ((ats->modified_addr == GNUNET_YES) || (ats->prob==NULL))
6901 ats->modified_addr = GNUNET_YES;
6902 ats_delete_problem ();
6903 ats_create_problem (ats->D, ats->U, ats->R, ats->v_b_min, ats->v_n_min, &ats->stat);
6905 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);
6908 else if ((ats->modified_addr == GNUNET_NO) && (ats->modified_resources == GNUNET_YES) && (ats->stat.valid == GNUNET_YES))
6910 ats_update_problem_cr();
6911 text = "modified resources";
6913 else if ((ats->modified_addr == GNUNET_NO) && (ats->modified_quality == GNUNET_YES) && (ats->stat.valid == GNUNET_YES))
6915 ats_update_problem_qm();
6916 //ats_update_problem_qm_TEST ();
6917 text = "modified quality";
6920 else GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Problem is unmodified\n");
6923 creation = GNUNET_TIME_absolute_get_difference(start,GNUNET_TIME_absolute_get());
6924 start = GNUNET_TIME_absolute_get();
6926 if (ats->stat.valid == GNUNET_YES)
6928 ats->stat.solution = GNUNET_SYSERR;
6929 ats_solve_problem(ats->max_iterations, ats->max_exec_duration.rel_value, ats->stat.c_peers, ats->stat.c_mechs, &ats->stat);
6931 solving = GNUNET_TIME_absolute_get_difference(start,GNUNET_TIME_absolute_get());
6933 if (ats->stat.valid == GNUNET_YES)
6936 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "MLP %s: creation time in [ms] %llu execution time in [ms] %llu for %i mechanisms: simplex rerun: %s\n",
6937 text, creation.rel_value, solving.rel_value,
6939 (ats->simplex_rerun_required == GNUNET_NO) ? " NO" : "YES");
6941 GNUNET_STATISTICS_set (stats, "ATS duration", solving.rel_value + creation.rel_value, GNUNET_NO);
6942 GNUNET_STATISTICS_set (stats, "ATS mechanisms", ats->stat.c_mechs, GNUNET_NO);
6943 GNUNET_STATISTICS_set (stats, "ATS peers", ats->stat.c_peers, GNUNET_NO);
6944 GNUNET_STATISTICS_set (stats, "ATS solution", ats->stat.solution, GNUNET_NO);
6945 GNUNET_STATISTICS_set (stats, "ATS timestamp", start.abs_value, GNUNET_NO);
6947 if ((ats->modified_addr == GNUNET_YES) || (ats->prob==NULL))
6948 GNUNET_STATISTICS_set (stats, "ATS state",ATS_NEW, GNUNET_NO);
6949 else if ((ats->modified_resources == GNUNET_YES) &&
6950 (ats->modified_quality == GNUNET_NO))
6951 GNUNET_STATISTICS_set (stats, "ATS state", ATS_C_UPDATED, GNUNET_NO);
6952 else if ((ats->modified_resources == GNUNET_NO) &&
6953 (ats->modified_quality == GNUNET_YES) &&
6954 (ats->simplex_rerun_required == GNUNET_NO))
6955 GNUNET_STATISTICS_set (stats, "ATS state", ATS_Q_UPDATED, GNUNET_NO);
6956 else if ((ats->modified_resources == GNUNET_YES) &&
6957 (ats->modified_quality == GNUNET_YES) &&
6958 (ats->simplex_rerun_required == GNUNET_NO))
6959 GNUNET_STATISTICS_set (stats, "ATS state", ATS_QC_UPDATED, GNUNET_NO);
6960 else if (ats->simplex_rerun_required == GNUNET_NO)
6961 GNUNET_STATISTICS_set (stats, "ATS state", ATS_UNMODIFIED, GNUNET_NO);
6964 if ((ats->save_mlp == GNUNET_YES) && (ats->stat.c_mechs >= ats->dump_min_peers) && (ats->stat.c_mechs >= ats->dump_min_addr))
6967 if (ats->dump_overwrite == GNUNET_NO)
6969 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i_%s_%llu.mlp",
6970 ats->stat.c_peers, ats->stat.c_mechs, text, GNUNET_TIME_absolute_get().abs_value);
6971 glp_write_lp (ats->prob, NULL, filename);
6975 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i.mlp",
6976 ats->stat.c_peers, ats->stat.c_mechs );
6977 glp_write_lp (ats->prob, NULL, filename);
6979 GNUNET_free (filename);
6981 if ((ats->save_solution == GNUNET_YES) && (ats->stat.c_mechs >= ats->dump_min_peers) && (ats->stat.c_mechs >= ats->dump_min_addr))
6984 if (ats->dump_overwrite == GNUNET_NO)
6986 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i_%s_%llu.sol",
6987 ats->stat.c_peers, ats->stat.c_mechs, text, GNUNET_TIME_absolute_get().abs_value);
6988 glp_print_sol (ats->prob, filename);
6992 GNUNET_asprintf (&filename, "ats_mlp_p%i_m%i.sol",
6993 ats->stat.c_peers, ats->stat.c_mechs);
6994 glp_print_sol (ats->prob, filename);
6996 GNUNET_free (filename);
6998 ats->last = GNUNET_TIME_absolute_get();
6999 ats->modified_addr = GNUNET_NO;
7000 ats->modified_resources = GNUNET_NO;
7001 ats->modified_quality = GNUNET_NO;
7006 ats_schedule_calculation (void *cls,
7007 const struct GNUNET_SCHEDULER_TaskContext *tc)
7009 struct ATS_info *ats = (struct ATS_info *) cls;
7010 if (ats==NULL) return;
7012 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7013 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
7017 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Running scheduled calculation\n");
7020 ats_calculate_bandwidth_distribution (ats);
7022 ats->ats_task = GNUNET_SCHEDULER_add_delayed (ats->exec_interval,
7023 &ats_schedule_calculation, ats);
7029 unsigned long long value;
7032 ats = GNUNET_malloc(sizeof (struct ATS_info));
7034 ats->min_delta = ATS_MIN_INTERVAL;
7035 ats->exec_interval = ATS_EXEC_INTERVAL;
7036 ats->max_exec_duration = ATS_MAX_EXEC_DURATION;
7037 ats->max_iterations = ATS_MAX_ITERATIONS;
7038 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7041 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "GLPK not installed, ATS not active\n");
7048 ats->v_b_min = 64000;
7050 ats->dump_min_peers = 1;
7051 ats->dump_min_addr = 1;
7052 ats->dump_overwrite = GNUNET_NO;
7058 /* loading cost ressources */
7059 for (c=0; c<available_ressources; c++)
7061 GNUNET_asprintf(§ion,"%s_UP",ressources[c].cfg_param);
7062 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
7064 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "transport",section, &value))
7067 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found ressource cost: [%s] = %llu\n", section, value);
7069 ressources[c].c_max = value;
7072 GNUNET_free (section);
7073 GNUNET_asprintf(§ion,"%s_DOWN",ressources[c].cfg_param);
7074 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
7076 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "transport",section, &value))
7079 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Found ressource cost: [%s] = %llu\n", section, value);
7081 ressources[c].c_min = value;
7084 GNUNET_free (section);
7087 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MLP"))
7088 ats->save_mlp = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_MLP");
7090 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_SOLUTION"))
7091 ats->save_solution = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_SOLUTION");
7092 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
7093 ats->dump_overwrite = GNUNET_CONFIGURATION_get_value_yesno (cfg, "transport","DUMP_OVERWRITE");
7094 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_PEERS"))
7096 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_MIN_PEERS", &value);
7097 ats->dump_min_peers= value;
7099 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_ADDRS"))
7101 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_MIN_ADDRS", &value);
7102 ats->dump_min_addr= value;
7104 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
7106 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","DUMP_OVERWRITE", &value);
7107 ats->min_delta.rel_value = value;
7110 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
7112 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_MIN_INTERVAL", &value);
7113 ats->min_delta.rel_value = value;
7116 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_EXEC_INTERVAL"))
7118 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_EXEC_INTERVAL", &value);
7119 ats->exec_interval.rel_value = value;
7121 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
7123 GNUNET_CONFIGURATION_get_value_number(cfg, "transport","ATS_MIN_INTERVAL", &value);
7124 ats->min_delta.rel_value = value;
7127 ats->ats_task = GNUNET_SCHEDULER_add_now(&ats_schedule_calculation, ats);
7131 static void ats_shutdown ()
7134 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_destroy\n");
7136 if (ats->ats_task != GNUNET_SCHEDULER_NO_TASK)
7137 GNUNET_SCHEDULER_cancel(ats->ats_task);
7138 ats->ats_task = GNUNET_SCHEDULER_NO_TASK;
7140 ats_delete_problem ();
7146 void ats_notify_peer_connect (
7147 const struct GNUNET_PeerIdentity *peer,
7148 const struct GNUNET_TRANSPORT_ATS_Information *ats_data, int ats_count)
7151 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_connect: %s\n",GNUNET_i2s(peer));
7154 //update_addr_ats();
7155 ats->modified_addr = GNUNET_YES;
7157 ats_calculate_bandwidth_distribution(ats);
7160 void ats_notify_peer_disconnect (
7161 const struct GNUNET_PeerIdentity *peer)
7164 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_disconnect: %s\n",GNUNET_i2s(peer));
7167 ats->modified_addr = GNUNET_YES;
7169 ats_calculate_bandwidth_distribution (ats);
7172 struct ForeignAddressList * ats_get_preferred_address (
7173 struct NeighbourList *n)
7176 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ats_get_prefered_transport for peer: %s\n",GNUNET_i2s(&n->id));
7178 struct ReadyList *next = n->plugins;
7179 while (next != NULL)
7182 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "plugin: %s %i\n",next->plugin->short_name,strcmp(next->plugin->short_name,"unix"));
7186 return find_ready_address(n);
7190 * Initiate transport service.
7192 * @param cls closure
7193 * @param server the initialized server
7194 * @param c configuration to use
7198 struct GNUNET_SERVER_Handle *server,
7199 const struct GNUNET_CONFIGURATION_Handle *c)
7201 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
7202 {&handle_start, NULL,
7203 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
7204 {&handle_hello, NULL,
7205 GNUNET_MESSAGE_TYPE_HELLO, 0},
7206 {&handle_send, NULL,
7207 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
7208 {&handle_request_connect, NULL,
7209 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT, sizeof(struct TransportRequestConnectMessage)},
7210 {&handle_set_quota, NULL,
7211 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
7212 {&handle_address_lookup, NULL,
7213 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP,
7215 {&handle_blacklist_init, NULL,
7216 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT, sizeof (struct GNUNET_MessageHeader)},
7217 {&handle_blacklist_reply, NULL,
7218 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY, sizeof (struct BlacklistMessage)},
7224 unsigned long long tneigh;
7228 stats = GNUNET_STATISTICS_create ("transport", cfg);
7229 validation_map = GNUNET_CONTAINER_multihashmap_create (64);
7230 /* parse configuration */
7232 GNUNET_CONFIGURATION_get_value_number (c,
7237 GNUNET_CONFIGURATION_get_value_filename (c,
7239 "HOSTKEY", &keyfile)))
7241 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7243 ("Transport service is lacking key configuration settings. Exiting.\n"));
7244 GNUNET_SCHEDULER_shutdown ();
7247 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7250 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7251 validation_map = NULL;
7255 max_connect_per_transport = (uint32_t) tneigh;
7256 peerinfo = GNUNET_PEERINFO_connect (cfg);
7257 if (peerinfo == NULL)
7259 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7260 _("Could not access PEERINFO service. Exiting.\n"));
7261 GNUNET_SCHEDULER_shutdown ();
7264 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7267 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7268 validation_map = NULL;
7269 GNUNET_free (keyfile);
7272 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
7273 GNUNET_free (keyfile);
7274 if (my_private_key == NULL)
7276 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7278 ("Transport service could not access hostkey. Exiting.\n"));
7279 GNUNET_SCHEDULER_shutdown ();
7282 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7285 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7286 validation_map = NULL;
7289 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
7290 GNUNET_CRYPTO_hash (&my_public_key,
7291 sizeof (my_public_key), &my_identity.hashPubKey);
7292 /* setup notification */
7293 GNUNET_SERVER_disconnect_notify (server,
7294 &client_disconnect_notification, NULL);
7295 /* load plugins... */
7298 GNUNET_CONFIGURATION_get_value_string (c,
7299 "TRANSPORT", "PLUGINS", &plugs))
7301 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
7302 _("Starting transport plugins `%s'\n"), plugs);
7303 pos = strtok (plugs, " ");
7306 start_transport (server, pos);
7308 pos = strtok (NULL, " ");
7310 GNUNET_free (plugs);
7312 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
7313 &shutdown_task, NULL);
7320 GNUNET_log (GNUNET_ERROR_TYPE_INFO, _("Transport service ready.\n"));
7322 /* If we have a blacklist file, read from it */
7323 read_blacklist_file(cfg);
7324 /* process client requests */
7325 GNUNET_SERVER_add_handlers (server, handlers);
7330 * The main function for the transport service.
7332 * @param argc number of arguments from the command line
7333 * @param argv command line arguments
7334 * @return 0 ok, 1 on error
7337 main (int argc, char *const *argv)
7339 a2s (NULL, NULL, 0); /* make compiler happy */
7340 return (GNUNET_OK ==
7341 GNUNET_SERVICE_run (argc,
7344 GNUNET_SERVICE_OPTION_NONE,
7345 &run, NULL)) ? 0 : 1;
7348 /* end of gnunet-service-transport.c */