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 ats->modified_addr = GNUNET_YES;
2531 if (nl->received_pong == GNUNET_NO)
2532 return; /* nothing to do, never connected... */
2533 /* check if we have any validated addresses left */
2534 pos = rl->addresses;
2539 try_fast_reconnect (p, nl);
2544 /* no valid addresses left, signal disconnect! */
2546 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2547 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&nl->id),
2548 "plugin_env_session_end");
2549 /* FIXME: This doesn't mean there are no addresses left for this PEER,
2550 * it means there aren't any left for this PLUGIN/PEER combination! So
2551 * calling disconnect_neighbor here with GNUNET_NO forces disconnect
2552 * when it isn't necessary. Using GNUNET_YES at least checks to see
2553 * if there are any addresses that work first, so as not to overdo it.
2556 disconnect_neighbour (nl, GNUNET_YES);
2561 * Function that must be called by each plugin to notify the
2562 * transport service about the addresses under which the transport
2563 * provided by the plugin can be reached.
2565 * @param cls closure
2566 * @param name name of the transport that generated the address
2567 * @param addr one of the addresses of the host, NULL for the last address
2568 * the specific address format depends on the transport
2569 * @param addrlen length of the address
2570 * @param expires when should this address automatically expire?
2573 plugin_env_notify_address (void *cls,
2577 struct GNUNET_TIME_Relative expires)
2579 struct TransportPlugin *p = cls;
2580 struct OwnAddressList *al;
2581 struct GNUNET_TIME_Absolute abex;
2583 GNUNET_assert (addr != NULL);
2584 abex = GNUNET_TIME_relative_to_absolute (expires);
2585 GNUNET_assert (p == find_transport (name));
2589 if ( (addrlen == al->addrlen) &&
2590 (0 == memcmp (addr, &al[1], addrlen)) )
2593 update_addresses (p, GNUNET_NO);
2598 al = GNUNET_malloc (sizeof (struct OwnAddressList) + addrlen);
2599 al->next = p->addresses;
2602 al->addrlen = addrlen;
2603 memcpy (&al[1], addr, addrlen);
2604 update_addresses (p, GNUNET_YES);
2609 * Notify all of our clients about a peer connecting.
2612 notify_clients_connect (const struct GNUNET_PeerIdentity *peer,
2613 struct GNUNET_TIME_Relative latency,
2616 struct ConnectInfoMessage * cim;
2617 struct TransportClient *cpos;
2622 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2623 "Notifying clients about connection from `%s'\n",
2626 GNUNET_STATISTICS_update (stats,
2627 gettext_noop ("# peers connected"),
2632 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
2633 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
2637 cim = GNUNET_malloc (size);
2639 cim->header.size = htons (size);
2640 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
2641 cim->ats_count = htonl(2);
2642 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
2643 (&(cim->ats))[0].value = htonl (distance);
2644 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
2645 (&(cim->ats))[1].value = htonl ((uint32_t) latency.rel_value);
2646 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
2647 (&(cim->ats))[2].value = htonl (0);
2648 memcpy (&cim->id, peer, sizeof (struct GNUNET_PeerIdentity));
2650 /* notify ats about connecting peer */
2651 ats_notify_peer_connect (peer, &(cim->ats), 2);
2654 while (cpos != NULL)
2656 transmit_to_client (cpos, &(cim->header), GNUNET_NO);
2665 * Notify all of our clients about a peer disconnecting.
2668 notify_clients_disconnect (const struct GNUNET_PeerIdentity *peer)
2670 struct DisconnectInfoMessage dim;
2671 struct TransportClient *cpos;
2674 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2675 "Notifying clients about lost connection to `%s'\n",
2678 GNUNET_STATISTICS_update (stats,
2679 gettext_noop ("# peers connected"),
2682 dim.header.size = htons (sizeof (struct DisconnectInfoMessage));
2683 dim.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
2684 dim.reserved = htonl (0);
2685 memcpy (&dim.peer, peer, sizeof (struct GNUNET_PeerIdentity));
2687 /* notify ats about connecting peer */
2688 ats_notify_peer_disconnect (peer);
2691 while (cpos != NULL)
2693 transmit_to_client (cpos, &dim.header, GNUNET_NO);
2700 * Find a ForeignAddressList entry for the given neighbour
2701 * that matches the given address and transport.
2703 * @param neighbour which peer we care about
2704 * @param tname name of the transport plugin
2705 * @param session session to look for, NULL for 'any'; otherwise
2706 * can be used for the service to "learn" this session ID
2708 * @param addr binary address
2709 * @param addrlen length of addr
2710 * @return NULL if no such entry exists
2712 static struct ForeignAddressList *
2713 find_peer_address(struct NeighbourList *neighbour,
2715 struct Session *session,
2719 struct ReadyList *head;
2720 struct ForeignAddressList *pos;
2722 head = neighbour->plugins;
2723 while (head != NULL)
2725 if (0 == strcmp (tname, head->plugin->short_name))
2731 pos = head->addresses;
2732 while ( (pos != NULL) &&
2733 ( (pos->addrlen != addrlen) ||
2734 (memcmp(pos->addr, addr, addrlen) != 0) ) )
2736 if ( (session != NULL) &&
2737 (pos->session == session) )
2741 if ( (session != NULL) && (pos != NULL) )
2742 pos->session = session; /* learn it! */
2748 * Get the peer address struct for the given neighbour and
2749 * address. If it doesn't yet exist, create it.
2751 * @param neighbour which peer we care about
2752 * @param tname name of the transport plugin
2753 * @param session session of the plugin, or NULL for none
2754 * @param addr binary address
2755 * @param addrlen length of addr
2756 * @return NULL if we do not have a transport plugin for 'tname'
2758 static struct ForeignAddressList *
2759 add_peer_address (struct NeighbourList *neighbour,
2761 struct Session *session,
2765 struct ReadyList *head;
2766 struct ForeignAddressList *ret;
2769 ret = find_peer_address (neighbour, tname, session, addr, addrlen);
2772 head = neighbour->plugins;
2774 while (head != NULL)
2776 if (0 == strcmp (tname, head->plugin->short_name))
2782 ret = GNUNET_malloc(sizeof(struct ForeignAddressList) + addrlen);
2783 ret->session = session;
2784 if ((addrlen > 0) && (addr != NULL))
2786 ret->addr = (const char*) &ret[1];
2787 memcpy (&ret[1], addr, addrlen);
2794 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;
2804 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"udp"))
2806 r[c].c = ressources[c].c_udp;
2808 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"tcp"))
2810 r[c].c = ressources[c].c_tcp;
2812 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"http"))
2814 r[c].c = ressources[c].c_http;
2816 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"https"))
2818 r[c].c = ressources[c].c_https;
2820 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"wlan"))
2822 r[c].c = ressources[c].c_wlan;
2826 r[c].c = ressources[c].c_default;
2827 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2828 "Assigning default cost to peer `%s' addr plugin `%s'! This should not happen!\n",
2829 GNUNET_i2s(&neighbour->peer),
2830 neighbour->plugins->plugin->short_name);
2834 ret->quality = GNUNET_malloc (available_quality_metrics * sizeof (struct ATS_quality_entry));
2835 ret->addrlen = addrlen;
2836 ret->expires = GNUNET_TIME_relative_to_absolute
2837 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2838 ret->latency = GNUNET_TIME_relative_get_forever();
2840 ret->timeout = GNUNET_TIME_relative_to_absolute
2841 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2842 ret->ready_list = head;
2843 ret->next = head->addresses;
2844 head->addresses = ret;
2850 * Closure for 'add_validated_address'.
2852 struct AddValidatedAddressContext
2855 * Entry that has been validated.
2857 const struct ValidationEntry *ve;
2860 * Flag set after we have added the address so
2861 * that we terminate the iteration next time.
2868 * Callback function used to fill a buffer of max bytes with a list of
2869 * addresses in the format used by HELLOs. Should use
2870 * "GNUNET_HELLO_add_address" as a helper function.
2872 * @param cls the 'struct AddValidatedAddressContext' with the validated address
2873 * @param max maximum number of bytes that can be written to buf
2874 * @param buf where to write the address information
2875 * @return number of bytes written, 0 to signal the
2876 * end of the iteration.
2879 add_validated_address (void *cls,
2880 size_t max, void *buf)
2882 struct AddValidatedAddressContext *avac = cls;
2883 const struct ValidationEntry *ve = avac->ve;
2885 if (GNUNET_YES == avac->done)
2887 avac->done = GNUNET_YES;
2888 return GNUNET_HELLO_add_address (ve->transport_name,
2889 GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION),
2899 * Closure for 'check_address_exists'.
2901 struct CheckAddressExistsClosure
2904 * Address to check for.
2909 * Name of the transport.
2916 struct Session *session;
2919 * Set to GNUNET_YES if the address exists.
2932 * Iterator over hash map entries. Checks if the given
2933 * validation entry is for the same address as what is given
2936 * @param cls the 'struct CheckAddressExistsClosure*'
2937 * @param key current key code (ignored)
2938 * @param value value in the hash map ('struct ValidationEntry')
2939 * @return GNUNET_YES if we should continue to
2940 * iterate (mismatch), GNUNET_NO if not (entry matched)
2943 check_address_exists (void *cls,
2944 const GNUNET_HashCode * key,
2947 struct CheckAddressExistsClosure *caec = cls;
2948 struct ValidationEntry *ve = value;
2950 if ( (0 == strcmp (caec->tname,
2951 ve->transport_name)) &&
2952 (caec->addrlen == ve->addrlen) &&
2953 (0 == memcmp (caec->addr,
2957 caec->exists = GNUNET_YES;
2960 if ( (ve->session != NULL) &&
2961 (caec->session == ve->session) )
2963 caec->exists = GNUNET_YES;
2972 * Iterator to free entries in the validation_map.
2974 * @param cls closure (unused)
2975 * @param key current key code
2976 * @param value value in the hash map (validation to abort)
2977 * @return GNUNET_YES (always)
2980 abort_validation (void *cls,
2981 const GNUNET_HashCode * key,
2984 struct ValidationEntry *va = value;
2986 if (GNUNET_SCHEDULER_NO_TASK != va->timeout_task)
2987 GNUNET_SCHEDULER_cancel (va->timeout_task);
2988 GNUNET_free (va->transport_name);
2989 if (va->chvc != NULL)
2991 va->chvc->ve_count--;
2992 if (va->chvc->ve_count == 0)
2994 GNUNET_CONTAINER_DLL_remove (chvc_head,
2997 GNUNET_free (va->chvc);
3007 * HELLO validation cleanup task (validation failed).
3009 * @param cls the 'struct ValidationEntry' that failed
3010 * @param tc scheduler context (unused)
3013 timeout_hello_validation (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3015 struct ValidationEntry *va = cls;
3016 struct GNUNET_PeerIdentity pid;
3018 va->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3019 GNUNET_STATISTICS_update (stats,
3020 gettext_noop ("# address validation timeouts"),
3023 GNUNET_CRYPTO_hash (&va->publicKey,
3025 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
3027 GNUNET_break (GNUNET_OK ==
3028 GNUNET_CONTAINER_multihashmap_remove (validation_map,
3031 abort_validation (NULL, NULL, va);
3036 neighbour_timeout_task (void *cls,
3037 const struct GNUNET_SCHEDULER_TaskContext *tc)
3039 struct NeighbourList *n = cls;
3042 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
3043 "Neighbour `%4s' has timed out!\n", GNUNET_i2s (&n->id));
3045 GNUNET_STATISTICS_update (stats,
3046 gettext_noop ("# disconnects due to timeout"),
3049 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3050 disconnect_neighbour (n, GNUNET_NO);
3055 * Schedule the job that will cause us to send a PING to the
3056 * foreign address to evaluate its validity and latency.
3058 * @param fal address to PING
3061 schedule_next_ping (struct ForeignAddressList *fal);
3065 * Add the given address to the list of foreign addresses
3066 * available for the given peer (check for duplicates).
3068 * @param cls the respective 'struct NeighbourList' to update
3069 * @param tname name of the transport
3070 * @param expiration expiration time
3071 * @param addr the address
3072 * @param addrlen length of the address
3073 * @return GNUNET_OK (always)
3076 add_to_foreign_address_list (void *cls,
3078 struct GNUNET_TIME_Absolute expiration,
3082 struct NeighbourList *n = cls;
3083 struct ForeignAddressList *fal;
3086 GNUNET_STATISTICS_update (stats,
3087 gettext_noop ("# valid peer addresses returned by PEERINFO"),
3091 fal = find_peer_address (n, tname, NULL, addr, addrlen);
3094 #if DEBUG_TRANSPORT_HELLO
3095 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3096 "Adding address `%s' (%s) for peer `%4s' due to PEERINFO data for %llums.\n",
3097 a2s (tname, addr, addrlen),
3099 GNUNET_i2s (&n->id),
3100 expiration.abs_value);
3102 fal = add_peer_address (n, tname, NULL, addr, addrlen);
3105 GNUNET_STATISTICS_update (stats,
3106 gettext_noop ("# previously validated addresses lacking transport"),
3112 fal->expires = GNUNET_TIME_absolute_max (expiration,
3114 schedule_next_ping (fal);
3120 fal->expires = GNUNET_TIME_absolute_max (expiration,
3125 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3126 "Failed to add new address for `%4s'\n",
3127 GNUNET_i2s (&n->id));
3130 if (fal->validated == GNUNET_NO)
3132 fal->validated = GNUNET_YES;
3133 GNUNET_STATISTICS_update (stats,
3134 gettext_noop ("# peer addresses considered valid"),
3138 if (try == GNUNET_YES)
3140 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3141 "Have new addresses, will try to trigger transmissions.\n");
3142 try_transmission_to_peer (n);
3149 * Add addresses in validated HELLO "h" to the set of addresses
3150 * we have for this peer.
3152 * @param cls closure ('struct NeighbourList*')
3153 * @param peer id of the peer, NULL for last call
3154 * @param h hello message for the peer (can be NULL)
3155 * @param err_msg NULL if successful, otherwise contains error message
3158 add_hello_for_peer (void *cls,
3159 const struct GNUNET_PeerIdentity *peer,
3160 const struct GNUNET_HELLO_Message *h,
3161 const char *err_msg)
3163 struct NeighbourList *n = cls;
3165 if (err_msg != NULL)
3167 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3168 _("Error in communication with PEERINFO service\n"));
3173 GNUNET_STATISTICS_update (stats,
3174 gettext_noop ("# outstanding peerinfo iterate requests"),
3181 return; /* no HELLO available */
3183 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3184 "Peerinfo had `%s' message for peer `%4s', adding existing addresses.\n",
3188 if (GNUNET_YES != n->public_key_valid)
3190 GNUNET_HELLO_get_key (h, &n->publicKey);
3191 n->public_key_valid = GNUNET_YES;
3193 GNUNET_HELLO_iterate_addresses (h,
3195 &add_to_foreign_address_list,
3201 * Create a fresh entry in our neighbour list for the given peer.
3202 * Will try to transmit our current HELLO to the new neighbour.
3203 * Do not call this function directly, use 'setup_peer_check_blacklist.
3205 * @param peer the peer for which we create the entry
3206 * @param do_hello should we schedule transmitting a HELLO
3207 * @return the new neighbour list entry
3209 static struct NeighbourList *
3210 setup_new_neighbour (const struct GNUNET_PeerIdentity *peer,
3213 struct NeighbourList *n;
3214 struct TransportPlugin *tp;
3215 struct ReadyList *rl;
3218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3219 "Setting up state for neighbour `%4s'\n",
3222 GNUNET_assert (our_hello != NULL);
3223 GNUNET_STATISTICS_update (stats,
3224 gettext_noop ("# active neighbours"),
3227 n = GNUNET_malloc (sizeof (struct NeighbourList));
3228 n->next = neighbours;
3232 GNUNET_TIME_relative_to_absolute
3233 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
3234 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
3235 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
3236 MAX_BANDWIDTH_CARRY_S);
3240 if ((tp->api->send != NULL) && (!is_blacklisted(peer, tp)))
3242 rl = GNUNET_malloc (sizeof (struct ReadyList));
3244 rl->next = n->plugins;
3247 rl->addresses = NULL;
3251 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
3253 n->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
3254 &neighbour_timeout_task, n);
3257 GNUNET_STATISTICS_update (stats,
3258 gettext_noop ("# peerinfo new neighbor iterate requests"),
3261 GNUNET_STATISTICS_update (stats,
3262 gettext_noop ("# outstanding peerinfo iterate requests"),
3265 n->piter = GNUNET_PEERINFO_iterate (peerinfo, peer,
3266 GNUNET_TIME_UNIT_FOREVER_REL,
3267 &add_hello_for_peer, n);
3269 GNUNET_STATISTICS_update (stats,
3270 gettext_noop ("# HELLO's sent to new neighbors"),
3273 transmit_to_peer (NULL, NULL, 0,
3274 HELLO_ADDRESS_EXPIRATION,
3275 (const char *) our_hello, GNUNET_HELLO_size(our_hello),
3283 * Function called after we have checked if communicating
3284 * with a given peer is acceptable.
3286 * @param cls closure
3287 * @param n NULL if communication is not acceptable
3289 typedef void (*SetupContinuation)(void *cls,
3290 struct NeighbourList *n);
3294 * Information kept for each client registered to perform
3300 * This is a linked list.
3302 struct Blacklisters *next;
3305 * This is a linked list.
3307 struct Blacklisters *prev;
3310 * Client responsible for this entry.
3312 struct GNUNET_SERVER_Client *client;
3315 * Blacklist check that we're currently performing.
3317 struct BlacklistCheck *bc;
3323 * Head of DLL of blacklisting clients.
3325 static struct Blacklisters *bl_head;
3328 * Tail of DLL of blacklisting clients.
3330 static struct Blacklisters *bl_tail;
3334 * Context we use when performing a blacklist check.
3336 struct BlacklistCheck
3340 * This is a linked list.
3342 struct BlacklistCheck *next;
3345 * This is a linked list.
3347 struct BlacklistCheck *prev;
3350 * Peer being checked.
3352 struct GNUNET_PeerIdentity peer;
3355 * Option for setup neighbour afterwards.
3360 * Continuation to call with the result.
3362 SetupContinuation cont;
3370 * Current transmission request handle for this client, or NULL if no
3371 * request is pending.
3373 struct GNUNET_CONNECTION_TransmitHandle *th;
3376 * Our current position in the blacklisters list.
3378 struct Blacklisters *bl_pos;
3381 * Current task performing the check.
3383 GNUNET_SCHEDULER_TaskIdentifier task;
3388 * Head of DLL of active blacklisting queries.
3390 static struct BlacklistCheck *bc_head;
3393 * Tail of DLL of active blacklisting queries.
3395 static struct BlacklistCheck *bc_tail;
3399 * Perform next action in the blacklist check.
3401 * @param cls the 'struct BlacklistCheck*'
3405 do_blacklist_check (void *cls,
3406 const struct GNUNET_SCHEDULER_TaskContext *tc);
3409 * Transmit blacklist query to the client.
3411 * @param cls the 'struct BlacklistCheck'
3412 * @param size number of bytes allowed
3413 * @param buf where to copy the message
3414 * @return number of bytes copied to buf
3417 transmit_blacklist_message (void *cls,
3421 struct BlacklistCheck *bc = cls;
3422 struct Blacklisters *bl;
3423 struct BlacklistMessage bm;
3428 GNUNET_assert (bc->task == GNUNET_SCHEDULER_NO_TASK);
3429 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3434 bm.header.size = htons (sizeof (struct BlacklistMessage));
3435 bm.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_QUERY);
3436 bm.is_allowed = htonl (0);
3438 memcpy (buf, &bm, sizeof (bm));
3439 GNUNET_SERVER_receive_done (bl->client, GNUNET_OK);
3445 * Perform next action in the blacklist check.
3447 * @param cls the 'struct BlacklistCheck*'
3451 do_blacklist_check (void *cls,
3452 const struct GNUNET_SCHEDULER_TaskContext *tc)
3454 struct BlacklistCheck *bc = cls;
3455 struct Blacklisters *bl;
3457 bc->task = GNUNET_SCHEDULER_NO_TASK;
3461 bc->cont (bc->cont_cls,
3462 setup_new_neighbour (&bc->peer, bc->do_hello));
3469 bc->th = GNUNET_SERVER_notify_transmit_ready (bl->client,
3470 sizeof (struct BlacklistMessage),
3471 GNUNET_TIME_UNIT_FOREVER_REL,
3472 &transmit_blacklist_message,
3479 * Obtain a 'struct NeighbourList' for the given peer. If such an entry
3480 * does not yet exist, check the blacklist. If the blacklist says creating
3481 * one is acceptable, create one and call the continuation; otherwise
3482 * call the continuation with NULL.
3484 * @param peer peer to setup or look up a struct NeighbourList for
3485 * @param do_hello should we also schedule sending our HELLO to the peer
3486 * if this is a new record
3487 * @param cont function to call with the 'struct NeigbhbourList*'
3488 * @param cont_cls closure for cont
3491 setup_peer_check_blacklist (const struct GNUNET_PeerIdentity *peer,
3493 SetupContinuation cont,
3496 struct NeighbourList *n;
3497 struct BlacklistCheck *bc;
3499 n = find_neighbour(peer);
3506 if (bl_head == NULL)
3509 cont (cont_cls, setup_new_neighbour (peer, do_hello));
3511 setup_new_neighbour(peer, do_hello);
3514 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3515 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3517 bc->do_hello = do_hello;
3519 bc->cont_cls = cont_cls;
3520 bc->bl_pos = bl_head;
3521 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3527 * Function called with the result of querying a new blacklister about
3528 * it being allowed (or not) to continue to talk to an existing neighbour.
3530 * @param cls the original 'struct NeighbourList'
3531 * @param n NULL if we need to disconnect
3534 confirm_or_drop_neighbour (void *cls,
3535 struct NeighbourList *n)
3537 struct NeighbourList * orig = cls;
3541 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3542 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&orig->id),
3543 "confirm_or_drop_neighboUr");
3544 disconnect_neighbour (orig, GNUNET_NO);
3550 * Handle a request to start a blacklist.
3552 * @param cls closure (always NULL)
3553 * @param client identification of the client
3554 * @param message the actual message
3557 handle_blacklist_init (void *cls,
3558 struct GNUNET_SERVER_Client *client,
3559 const struct GNUNET_MessageHeader *message)
3561 struct Blacklisters *bl;
3562 struct BlacklistCheck *bc;
3563 struct NeighbourList *n;
3568 if (bl->client == client)
3571 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3576 bl = GNUNET_malloc (sizeof (struct Blacklisters));
3577 bl->client = client;
3578 GNUNET_SERVER_client_keep (client);
3579 GNUNET_CONTAINER_DLL_insert_after (bl_head, bl_tail, bl_tail, bl);
3580 /* confirm that all existing connections are OK! */
3584 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3585 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3587 bc->do_hello = GNUNET_NO;
3588 bc->cont = &confirm_or_drop_neighbour;
3591 if (n == neighbours) /* all would wait for the same client, no need to
3592 create more than just the first task right now */
3593 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3601 * Handle a request to blacklist a peer.
3603 * @param cls closure (always NULL)
3604 * @param client identification of the client
3605 * @param message the actual message
3608 handle_blacklist_reply (void *cls,
3609 struct GNUNET_SERVER_Client *client,
3610 const struct GNUNET_MessageHeader *message)
3612 const struct BlacklistMessage *msg = (const struct BlacklistMessage*) message;
3613 struct Blacklisters *bl;
3614 struct BlacklistCheck *bc;
3617 while ( (bl != NULL) &&
3618 (bl->client != client) )
3622 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3627 if (ntohl (msg->is_allowed) == GNUNET_SYSERR)
3629 bc->cont (bc->cont_cls, NULL);
3630 GNUNET_CONTAINER_DLL_remove (bc_head, bc_tail, bc);
3635 bc->bl_pos = bc->bl_pos->next;
3636 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3639 /* check if any other bc's are waiting for this blacklister */
3643 if ( (bc->bl_pos == bl) &&
3644 (GNUNET_SCHEDULER_NO_TASK == bc->task) )
3645 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3653 * Send periodic PING messages to a given foreign address.
3655 * @param cls our 'struct PeriodicValidationContext*'
3656 * @param tc task context
3659 send_periodic_ping (void *cls,
3660 const struct GNUNET_SCHEDULER_TaskContext *tc)
3662 struct ForeignAddressList *peer_address = cls;
3663 struct TransportPlugin *tp;
3664 struct ValidationEntry *va;
3665 struct NeighbourList *neighbour;
3666 struct TransportPingMessage ping;
3667 struct CheckAddressExistsClosure caec;
3669 uint16_t hello_size;
3673 peer_address->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
3674 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3676 tp = peer_address->ready_list->plugin;
3677 neighbour = peer_address->ready_list->neighbour;
3678 if (GNUNET_YES != neighbour->public_key_valid)
3680 /* no public key yet, try again later */
3681 schedule_next_ping (peer_address);
3684 caec.addr = peer_address->addr;
3685 caec.addrlen = peer_address->addrlen;
3686 caec.tname = tp->short_name;
3687 caec.session = peer_address->session;
3688 caec.exists = GNUNET_NO;
3689 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
3690 &check_address_exists,
3692 if (caec.exists == GNUNET_YES)
3694 /* During validation attempts we will likely trigger the other
3695 peer trying to validate our address which in turn will cause
3696 it to send us its HELLO, so we expect to hit this case rather
3697 frequently. Only print something if we are very verbose. */
3698 #if DEBUG_TRANSPORT > 1
3699 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3700 "Some validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
3701 (peer_address->addr != NULL)
3702 ? a2s (tp->short_name,
3704 peer_address->addrlen)
3707 GNUNET_i2s (&neighbour->id));
3709 schedule_next_ping (peer_address);
3712 va = GNUNET_malloc (sizeof (struct ValidationEntry) + peer_address->addrlen);
3713 va->transport_name = GNUNET_strdup (tp->short_name);
3714 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
3716 va->send_time = GNUNET_TIME_absolute_get();
3717 va->session = peer_address->session;
3718 if (peer_address->addr != NULL)
3720 va->addr = (const void*) &va[1];
3721 memcpy (&va[1], peer_address->addr, peer_address->addrlen);
3722 va->addrlen = peer_address->addrlen;
3724 memcpy(&va->publicKey,
3725 &neighbour->publicKey,
3726 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
3728 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
3729 &timeout_hello_validation,
3731 GNUNET_CONTAINER_multihashmap_put (validation_map,
3732 &neighbour->id.hashPubKey,
3734 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3736 if (peer_address->validated != GNUNET_YES)
3737 hello_size = GNUNET_HELLO_size(our_hello);
3741 tsize = sizeof(struct TransportPingMessage) + hello_size;
3743 if (peer_address->addr != NULL)
3745 slen = strlen (tp->short_name) + 1;
3746 tsize += slen + peer_address->addrlen;
3750 slen = 0; /* make gcc happy */
3752 message_buf = GNUNET_malloc(tsize);
3753 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
3754 ping.challenge = htonl(va->challenge);
3755 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
3756 if (peer_address->validated != GNUNET_YES)
3758 memcpy(message_buf, our_hello, hello_size);
3761 if (peer_address->addr != NULL)
3763 ping.header.size = htons(sizeof(struct TransportPingMessage) +
3764 peer_address->addrlen +
3766 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
3769 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
3771 peer_address->addrlen);
3775 ping.header.size = htons(sizeof(struct TransportPingMessage));
3778 memcpy(&message_buf[hello_size],
3780 sizeof(struct TransportPingMessage));
3782 #if DEBUG_TRANSPORT_REVALIDATION
3783 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3784 "Performing re-validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s'\n",
3785 (peer_address->addr != NULL)
3786 ? a2s (peer_address->plugin->short_name,
3788 peer_address->addrlen)
3791 GNUNET_i2s (&neighbour->id),
3792 "HELLO", hello_size,
3795 if (peer_address->validated != GNUNET_YES)
3796 GNUNET_STATISTICS_update (stats,
3797 gettext_noop ("# PING with HELLO messages sent"),
3801 GNUNET_STATISTICS_update (stats,
3802 gettext_noop ("# PING without HELLO messages sent"),
3805 GNUNET_STATISTICS_update (stats,
3806 gettext_noop ("# PING messages sent for re-validation"),
3809 transmit_to_peer (NULL, peer_address,
3810 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
3811 HELLO_VERIFICATION_TIMEOUT,
3813 GNUNET_YES, neighbour);
3814 GNUNET_free(message_buf);
3815 schedule_next_ping (peer_address);
3820 * Schedule the job that will cause us to send a PING to the
3821 * foreign address to evaluate its validity and latency.
3823 * @param fal address to PING
3826 schedule_next_ping (struct ForeignAddressList *fal)
3828 struct GNUNET_TIME_Relative delay;
3830 if (fal->revalidate_task != GNUNET_SCHEDULER_NO_TASK)
3832 delay = GNUNET_TIME_absolute_get_remaining (fal->expires);
3833 delay.rel_value /= 2; /* do before expiration */
3834 delay = GNUNET_TIME_relative_min (delay,
3835 LATENCY_EVALUATION_MAX_DELAY);
3836 if (GNUNET_YES != fal->estimated)
3838 delay = GNUNET_TIME_UNIT_ZERO;
3839 fal->estimated = GNUNET_YES;
3841 if (GNUNET_YES == fal->connected)
3843 delay = GNUNET_TIME_relative_min (delay,
3844 CONNECTED_LATENCY_EVALUATION_MAX_DELAY);
3846 /* FIXME: also adjust delay based on how close the last
3847 observed latency is to the latency of the best alternative */
3848 /* bound how fast we can go */
3849 delay = GNUNET_TIME_relative_max (delay,
3850 GNUNET_TIME_UNIT_SECONDS);
3851 /* randomize a bit (to avoid doing all at the same time) */
3852 delay.rel_value += GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1000);
3853 fal->revalidate_task = GNUNET_SCHEDULER_add_delayed(delay,
3854 &send_periodic_ping,
3862 * Function that will be called if we receive some payload
3863 * from another peer.
3865 * @param message the payload
3866 * @param n peer who claimed to be the sender
3869 handle_payload_message (const struct GNUNET_MessageHeader *message,
3870 struct NeighbourList *n)
3872 struct InboundMessage *im;
3873 struct TransportClient *cpos;
3876 msize = ntohs (message->size);
3877 if (n->received_pong == GNUNET_NO)
3879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3880 "Received message of type %u and size %u from `%4s', but no pong yet!!\n",
3881 ntohs (message->type),
3882 ntohs (message->size),
3883 GNUNET_i2s (&n->id));
3884 GNUNET_free_non_null (n->pre_connect_message_buffer);
3885 n->pre_connect_message_buffer = GNUNET_malloc (msize);
3886 memcpy (n->pre_connect_message_buffer, message, msize);
3891 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3892 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
3893 ntohs (message->type),
3894 ntohs (message->size),
3895 GNUNET_i2s (&n->id));
3897 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3900 n->quota_violation_count++;
3902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3903 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
3904 n->in_tracker.available_bytes_per_s__,
3905 n->quota_violation_count);
3907 /* Discount 32k per violation */
3908 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3913 if (n->quota_violation_count > 0)
3915 /* try to add 32k back */
3916 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3918 n->quota_violation_count--;
3921 GNUNET_STATISTICS_update (stats,
3922 gettext_noop ("# payload received from other peers"),
3925 /* transmit message to all clients */
3926 uint32_t ats_count = 2;
3927 size_t size = sizeof (struct InboundMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information) + msize;
3928 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
3931 im = GNUNET_malloc (size);
3932 im->header.size = htons (size);
3933 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
3935 im->ats_count = htonl(ats_count);
3936 /* Setting ATS data */
3937 (&(im->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
3938 (&(im->ats))[0].value = htonl (n->distance);
3939 (&(im->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
3940 (&(im->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
3941 (&(im->ats))[ats_count].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
3942 (&(im->ats))[ats_count].value = htonl (0);
3944 memcpy (&((&(im->ats))[ats_count+1]), message, msize);
3946 while (cpos != NULL)
3948 transmit_to_client (cpos, &im->header, GNUNET_YES);
3956 * Iterator over hash map entries. Checks if the given validation
3957 * entry is for the same challenge as what is given in the PONG.
3959 * @param cls the 'struct TransportPongMessage*'
3960 * @param key peer identity
3961 * @param value value in the hash map ('struct ValidationEntry')
3962 * @return GNUNET_YES if we should continue to
3963 * iterate (mismatch), GNUNET_NO if not (entry matched)
3966 check_pending_validation (void *cls,
3967 const GNUNET_HashCode * key,
3970 const struct TransportPongMessage *pong = cls;
3971 struct ValidationEntry *ve = value;
3972 struct AddValidatedAddressContext avac;
3973 unsigned int challenge = ntohl(pong->challenge);
3974 struct GNUNET_HELLO_Message *hello;
3975 struct GNUNET_PeerIdentity target;
3976 struct NeighbourList *n;
3977 struct ForeignAddressList *fal;
3978 struct OwnAddressList *oal;
3979 struct TransportPlugin *tp;
3980 struct GNUNET_MessageHeader *prem;
3986 ps = ntohs (pong->header.size);
3987 if (ps < sizeof (struct TransportPongMessage))
3989 GNUNET_break_op (0);
3992 addr = (const char*) &pong[1];
3993 slen = strlen (ve->transport_name) + 1;
3994 if ( (ps - sizeof (struct TransportPongMessage) < slen) ||
3995 (ve->challenge != challenge) ||
3996 (addr[slen-1] != '\0') ||
3997 (0 != strcmp (addr, ve->transport_name)) ||
3998 (ntohl (pong->purpose.size)
3999 != sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
4001 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
4002 sizeof (struct GNUNET_PeerIdentity) + ps - sizeof (struct TransportPongMessage)) )
4007 alen = ps - sizeof (struct TransportPongMessage) - slen;
4008 switch (ntohl (pong->purpose.purpose))
4010 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN:
4011 if ( (ve->addrlen + slen != ntohl (pong->addrlen)) ||
4012 (0 != memcmp (&addr[slen],
4016 return GNUNET_YES; /* different entry, keep trying! */
4018 if (0 != memcmp (&pong->pid,
4020 sizeof (struct GNUNET_PeerIdentity)))
4022 GNUNET_break_op (0);
4026 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN,
4031 GNUNET_break_op (0);
4036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4037 "Confirmed validity of address, peer `%4s' has address `%s' (%s).\n",
4039 a2s (ve->transport_name,
4040 (const struct sockaddr *) ve->addr,
4042 ve->transport_name);
4045 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING:
4046 if (0 != memcmp (&pong->pid,
4048 sizeof (struct GNUNET_PeerIdentity)))
4051 GNUNET_asprintf(&peer, "%s",GNUNET_i2s (&pong->pid));
4052 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4053 "Received PONG for different identity: I am `%s', PONG identity: `%s'\n",GNUNET_i2s (&my_identity), peer );
4057 if (ve->addrlen != 0)
4059 /* must have been for a different validation entry */
4062 tp = find_transport (ve->transport_name);
4068 oal = tp->addresses;
4071 if ( (oal->addrlen == alen) &&
4072 (0 == memcmp (&oal[1],
4080 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4081 _("Not accepting PONG with address `%s' since I cannot confirm having this address.\n"),
4082 a2s (ve->transport_name,
4088 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING,
4093 GNUNET_break_op (0);
4098 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4099 "Confirmed that peer `%4s' is talking to us using address `%s' (%s) for us.\n",
4101 a2s (ve->transport_name,
4104 ve->transport_name);
4108 GNUNET_break_op (0);
4111 if (GNUNET_TIME_absolute_get_remaining (GNUNET_TIME_absolute_ntoh (pong->expiration)).rel_value == 0)
4113 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4114 _("Received expired signature. Check system time.\n"));
4117 GNUNET_STATISTICS_update (stats,
4118 gettext_noop ("# address validation successes"),
4121 /* create the updated HELLO */
4122 GNUNET_CRYPTO_hash (&ve->publicKey,
4123 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4124 &target.hashPubKey);
4125 if (ve->addr != NULL)
4127 avac.done = GNUNET_NO;
4129 hello = GNUNET_HELLO_create (&ve->publicKey,
4130 &add_validated_address,
4132 GNUNET_PEERINFO_add_peer (peerinfo,
4134 GNUNET_free (hello);
4136 n = find_neighbour (&target);
4139 n->publicKey = ve->publicKey;
4140 n->public_key_valid = GNUNET_YES;
4141 fal = add_peer_address (n,
4146 GNUNET_assert (fal != NULL);
4147 fal->expires = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
4148 fal->validated = GNUNET_YES;
4149 mark_address_connected (fal);
4150 GNUNET_STATISTICS_update (stats,
4151 gettext_noop ("# peer addresses considered valid"),
4154 fal->latency = GNUNET_TIME_absolute_get_duration (ve->send_time);
4155 update_addr_value (fal, GNUNET_TIME_absolute_get_duration (ve->send_time).rel_value, GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4157 schedule_next_ping (fal);
4158 if (n->latency.rel_value == GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
4159 n->latency = fal->latency;
4161 n->latency.rel_value = (fal->latency.rel_value + n->latency.rel_value) / 2;
4163 n->distance = fal->distance;
4164 if (GNUNET_NO == n->received_pong)
4166 n->received_pong = GNUNET_YES;
4168 notify_clients_connect (&target, n->latency, n->distance);
4169 if (NULL != (prem = n->pre_connect_message_buffer))
4171 n->pre_connect_message_buffer = NULL;
4172 handle_payload_message (prem, n);
4176 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4178 GNUNET_SCHEDULER_cancel (n->retry_task);
4179 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4180 try_transmission_to_peer (n);
4184 /* clean up validation entry */
4185 GNUNET_assert (GNUNET_YES ==
4186 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4189 abort_validation (NULL, NULL, ve);
4195 * Function that will be called if we receive a validation
4196 * of an address challenge that we transmitted to another
4197 * peer. Note that the validation should only be considered
4198 * acceptable if the challenge matches AND if the sender
4199 * address is at least a plausible address for this peer
4200 * (otherwise we may be seeing a MiM attack).
4202 * @param cls closure
4203 * @param message the pong message
4204 * @param peer who responded to our challenge
4205 * @param sender_address string describing our sender address (as observed
4206 * by the other peer in binary format)
4207 * @param sender_address_len number of bytes in 'sender_address'
4210 handle_pong (void *cls, const struct GNUNET_MessageHeader *message,
4211 const struct GNUNET_PeerIdentity *peer,
4212 const char *sender_address,
4213 size_t sender_address_len)
4215 #if DEBUG_TRANSPORT > 1
4216 /* we get tons of these that just get discarded, only log
4217 if we are quite verbose */
4218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4219 "Receiving `%s' message from `%4s'.\n", "PONG",
4222 GNUNET_STATISTICS_update (stats,
4223 gettext_noop ("# PONG messages received"),
4226 if (GNUNET_SYSERR !=
4227 GNUNET_CONTAINER_multihashmap_get_multiple (validation_map,
4229 &check_pending_validation,
4232 /* This is *expected* to happen a lot since we send
4233 PONGs to *all* known addresses of the sender of
4234 the PING, so most likely we get multiple PONGs
4235 per PING, and all but the first PONG will end up
4236 here. So really we should not print anything here
4237 unless we want to be very, very verbose... */
4238 #if DEBUG_TRANSPORT > 2
4239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4240 "Received `%s' message from `%4s' but have no record of a matching `%s' message. Ignoring.\n",
4252 * Try to validate a neighbour's address by sending him our HELLO and a PING.
4254 * @param cls the 'struct ValidationEntry*'
4255 * @param neighbour neighbour to validate, NULL if validation failed
4258 transmit_hello_and_ping (void *cls,
4259 struct NeighbourList *neighbour)
4261 struct ValidationEntry *va = cls;
4262 struct ForeignAddressList *peer_address;
4263 struct TransportPingMessage ping;
4264 uint16_t hello_size;
4267 struct GNUNET_PeerIdentity id;
4270 GNUNET_CRYPTO_hash (&va->publicKey,
4271 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4273 if (neighbour == NULL)
4275 /* FIXME: stats... */
4276 GNUNET_break (GNUNET_OK ==
4277 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4280 abort_validation (NULL, NULL, va);
4283 neighbour->publicKey = va->publicKey;
4284 neighbour->public_key_valid = GNUNET_YES;
4285 peer_address = add_peer_address (neighbour,
4286 va->transport_name, NULL,
4287 (const void*) &va[1],
4289 if (peer_address == NULL)
4291 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4292 "Failed to add peer `%4s' for plugin `%s'\n",
4293 GNUNET_i2s (&neighbour->id),
4294 va->transport_name);
4295 GNUNET_break (GNUNET_OK ==
4296 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4299 abort_validation (NULL, NULL, va);
4302 hello_size = GNUNET_HELLO_size(our_hello);
4303 slen = strlen(va->transport_name) + 1;
4304 tsize = sizeof(struct TransportPingMessage) + hello_size + va->addrlen + slen;
4305 message_buf = GNUNET_malloc(tsize);
4306 ping.challenge = htonl(va->challenge);
4307 ping.header.size = htons(sizeof(struct TransportPingMessage) + slen + va->addrlen);
4308 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
4309 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
4310 memcpy(message_buf, our_hello, hello_size);
4311 memcpy(&message_buf[hello_size],
4313 sizeof(struct TransportPingMessage));
4314 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
4317 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
4321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4322 "Performing validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s' (%u bytes)\n",
4325 : a2s (va->transport_name,
4326 (const void*) &va[1], va->addrlen),
4328 GNUNET_i2s (&neighbour->id),
4329 "HELLO", hello_size,
4330 "PING", sizeof (struct TransportPingMessage) + va->addrlen + slen);
4333 GNUNET_STATISTICS_update (stats,
4334 gettext_noop ("# PING messages sent for initial validation"),
4337 transmit_to_peer (NULL, peer_address,
4338 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
4339 HELLO_VERIFICATION_TIMEOUT,
4341 GNUNET_YES, neighbour);
4342 GNUNET_free(message_buf);
4347 * Check if the given address is already being validated; if not,
4348 * append the given address to the list of entries that are being be
4349 * validated and initiate validation.
4351 * @param cls closure ('struct CheckHelloValidatedContext *')
4352 * @param tname name of the transport
4353 * @param expiration expiration time
4354 * @param addr the address
4355 * @param addrlen length of the address
4356 * @return GNUNET_OK (always)
4359 run_validation (void *cls,
4361 struct GNUNET_TIME_Absolute expiration,
4365 struct CheckHelloValidatedContext *chvc = cls;
4366 struct GNUNET_PeerIdentity id;
4367 struct TransportPlugin *tp;
4368 struct ValidationEntry *va;
4369 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4370 struct CheckAddressExistsClosure caec;
4371 struct OwnAddressList *oal;
4373 GNUNET_assert (addr != NULL);
4375 GNUNET_STATISTICS_update (stats,
4376 gettext_noop ("# peer addresses scheduled for validation"),
4379 tp = find_transport (tname);
4382 GNUNET_log (GNUNET_ERROR_TYPE_INFO |
4383 GNUNET_ERROR_TYPE_BULK,
4385 ("Transport `%s' not loaded, will not try to validate peer address using this transport.\n"),
4387 GNUNET_STATISTICS_update (stats,
4388 gettext_noop ("# peer addresses not validated (plugin not available)"),
4393 /* check if this is one of our own addresses */
4394 oal = tp->addresses;
4397 if ( (oal->addrlen == addrlen) &&
4398 (0 == memcmp (&oal[1],
4402 /* not plausible, this address is equivalent to our own address! */
4403 GNUNET_STATISTICS_update (stats,
4404 gettext_noop ("# peer addresses not validated (loopback)"),
4411 GNUNET_HELLO_get_key (chvc->hello, &pk);
4412 GNUNET_CRYPTO_hash (&pk,
4414 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4417 if (is_blacklisted(&id, tp))
4420 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4421 "Attempted to validate blacklisted peer `%s' using `%s'!\n",
4429 caec.addrlen = addrlen;
4430 caec.session = NULL;
4432 caec.exists = GNUNET_NO;
4433 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
4434 &check_address_exists,
4436 if (caec.exists == GNUNET_YES)
4438 /* During validation attempts we will likely trigger the other
4439 peer trying to validate our address which in turn will cause
4440 it to send us its HELLO, so we expect to hit this case rather
4441 frequently. Only print something if we are very verbose. */
4442 #if DEBUG_TRANSPORT > 1
4443 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4444 "Validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
4445 a2s (tname, addr, addrlen),
4449 GNUNET_STATISTICS_update (stats,
4450 gettext_noop ("# peer addresses not validated (in progress)"),
4455 va = GNUNET_malloc (sizeof (struct ValidationEntry) + addrlen);
4458 va->transport_name = GNUNET_strdup (tname);
4459 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
4461 va->send_time = GNUNET_TIME_absolute_get();
4462 va->addr = (const void*) &va[1];
4463 memcpy (&va[1], addr, addrlen);
4464 va->addrlen = addrlen;
4465 GNUNET_HELLO_get_key (chvc->hello,
4467 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
4468 &timeout_hello_validation,
4470 GNUNET_CONTAINER_multihashmap_put (validation_map,
4473 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4474 setup_peer_check_blacklist (&id, GNUNET_NO,
4475 &transmit_hello_and_ping,
4482 * Check if addresses in validated hello "h" overlap with
4483 * those in "chvc->hello" and validate the rest.
4485 * @param cls closure
4486 * @param peer id of the peer, NULL for last call
4487 * @param h hello message for the peer (can be NULL)
4488 * @param err_msg NULL if successful, otherwise contains error message
4491 check_hello_validated (void *cls,
4492 const struct GNUNET_PeerIdentity *peer,
4493 const struct GNUNET_HELLO_Message *h,
4494 const char *err_msg)
4496 struct CheckHelloValidatedContext *chvc = cls;
4497 struct GNUNET_HELLO_Message *plain_hello;
4498 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4499 struct GNUNET_PeerIdentity target;
4500 struct NeighbourList *n;
4502 if (err_msg != NULL)
4504 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4505 _("Error in communication with PEERINFO service\n"));
4511 GNUNET_STATISTICS_update (stats,
4512 gettext_noop ("# outstanding peerinfo iterate requests"),
4516 if (GNUNET_NO == chvc->hello_known)
4518 /* notify PEERINFO about the peer now, so that we at least
4519 have the public key if some other component needs it */
4520 GNUNET_HELLO_get_key (chvc->hello, &pk);
4521 GNUNET_CRYPTO_hash (&pk,
4522 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4523 &target.hashPubKey);
4524 plain_hello = GNUNET_HELLO_create (&pk,
4527 GNUNET_PEERINFO_add_peer (peerinfo, plain_hello);
4528 GNUNET_free (plain_hello);
4529 #if DEBUG_TRANSPORT_HELLO
4530 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4531 "PEERINFO had no `%s' message for peer `%4s', full validation needed.\n",
4533 GNUNET_i2s (&target));
4535 GNUNET_STATISTICS_update (stats,
4536 gettext_noop ("# new HELLOs requiring full validation"),
4539 GNUNET_HELLO_iterate_addresses (chvc->hello,
4546 GNUNET_STATISTICS_update (stats,
4547 gettext_noop ("# duplicate HELLO (peer known)"),
4552 if (chvc->ve_count == 0)
4554 GNUNET_CONTAINER_DLL_remove (chvc_head,
4563 #if DEBUG_TRANSPORT_HELLO
4564 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4565 "PEERINFO had `%s' message for peer `%4s', validating only new addresses.\n",
4569 chvc->hello_known = GNUNET_YES;
4570 n = find_neighbour (peer);
4573 #if DEBUG_TRANSPORT_HELLO
4574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4575 "Calling hello_iterate_addresses for %s!\n",
4578 GNUNET_HELLO_iterate_addresses (h,
4580 &add_to_foreign_address_list,
4582 try_transmission_to_peer (n);
4586 #if DEBUG_TRANSPORT_HELLO
4587 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4588 "No existing neighbor record for %s!\n",
4591 GNUNET_STATISTICS_update (stats,
4592 gettext_noop ("# no existing neighbour record (validating HELLO)"),
4596 GNUNET_STATISTICS_update (stats,
4597 gettext_noop ("# HELLO validations (update case)"),
4600 GNUNET_HELLO_iterate_new_addresses (chvc->hello,
4602 GNUNET_TIME_relative_to_absolute (HELLO_REVALIDATION_START_TIME),
4609 * Process HELLO-message.
4611 * @param plugin transport involved, may be NULL
4612 * @param message the actual message
4613 * @return GNUNET_OK if the HELLO was well-formed, GNUNET_SYSERR otherwise
4616 process_hello (struct TransportPlugin *plugin,
4617 const struct GNUNET_MessageHeader *message)
4620 struct GNUNET_PeerIdentity target;
4621 const struct GNUNET_HELLO_Message *hello;
4622 struct CheckHelloValidatedContext *chvc;
4623 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
4624 #if DEBUG_TRANSPORT_HELLO > 2
4627 hsize = ntohs (message->size);
4628 if ((ntohs (message->type) != GNUNET_MESSAGE_TYPE_HELLO) ||
4629 (hsize < sizeof (struct GNUNET_MessageHeader)))
4632 return GNUNET_SYSERR;
4634 GNUNET_STATISTICS_update (stats,
4635 gettext_noop ("# HELLOs received for validation"),
4639 /* first, check if load is too high */
4640 if (GNUNET_SCHEDULER_get_load (GNUNET_SCHEDULER_PRIORITY_BACKGROUND) > MAX_HELLO_LOAD)
4642 GNUNET_STATISTICS_update (stats,
4643 gettext_noop ("# HELLOs ignored due to high load"),
4646 #if DEBUG_TRANSPORT_HELLO
4647 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4648 "Ignoring `%s' for `%4s', load too high.\n",
4650 GNUNET_i2s (&target));
4654 hello = (const struct GNUNET_HELLO_Message *) message;
4655 if (GNUNET_OK != GNUNET_HELLO_get_key (hello, &publicKey))
4657 #if DEBUG_TRANSPORT_HELLO
4658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4659 "Unable to get public key from `%s' for `%4s'!\n",
4661 GNUNET_i2s (&target));
4663 GNUNET_break_op (0);
4664 return GNUNET_SYSERR;
4667 GNUNET_CRYPTO_hash (&publicKey,
4668 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4669 &target.hashPubKey);
4671 #if DEBUG_TRANSPORT_HELLO
4672 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4673 "Received `%s' message for `%4s'\n",
4675 GNUNET_i2s (&target));
4678 if (0 == memcmp (&my_identity,
4680 sizeof (struct GNUNET_PeerIdentity)))
4682 GNUNET_STATISTICS_update (stats,
4683 gettext_noop ("# HELLOs ignored for validation (is my own HELLO)"),
4689 while (NULL != chvc)
4691 if (GNUNET_HELLO_equals (hello,
4693 GNUNET_TIME_absolute_get ()).abs_value > 0)
4695 #if DEBUG_TRANSPORT_HELLO > 2
4696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4697 "Received duplicate `%s' message for `%4s'; ignored\n",
4699 GNUNET_i2s (&target));
4701 return GNUNET_OK; /* validation already pending */
4703 if (GNUNET_HELLO_size(hello) == GNUNET_HELLO_size (chvc->hello))
4704 GNUNET_break (0 != memcmp (hello, chvc->hello,
4705 GNUNET_HELLO_size(hello)));
4710 struct NeighbourList *temp_neighbor = find_neighbour(&target);
4711 if ((NULL != temp_neighbor))
4713 fprintf(stderr, "Already know peer, ignoring hello\n");
4718 #if DEBUG_TRANSPORT_HELLO > 2
4721 my_id = GNUNET_strdup(GNUNET_i2s(plugin->env.my_identity));
4722 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4723 "%s: Starting validation of `%s' message for `%4s' via '%s' of size %u\n",
4726 GNUNET_i2s (&target),
4728 GNUNET_HELLO_size(hello));
4732 chvc = GNUNET_malloc (sizeof (struct CheckHelloValidatedContext) + hsize);
4734 chvc->hello = (const struct GNUNET_HELLO_Message *) &chvc[1];
4735 memcpy (&chvc[1], hello, hsize);
4736 GNUNET_CONTAINER_DLL_insert (chvc_head,
4739 /* finally, check if HELLO was previously validated
4740 (continuation will then schedule actual validation) */
4741 GNUNET_STATISTICS_update (stats,
4742 gettext_noop ("# peerinfo process hello iterate requests"),
4745 GNUNET_STATISTICS_update (stats,
4746 gettext_noop ("# outstanding peerinfo iterate requests"),
4749 chvc->piter = GNUNET_PEERINFO_iterate (peerinfo,
4751 HELLO_VERIFICATION_TIMEOUT,
4752 &check_hello_validated, chvc);
4758 * The peer specified by the given neighbour has timed-out or a plugin
4759 * has disconnected. We may either need to do nothing (other plugins
4760 * still up), or trigger a full disconnect and clean up. This
4761 * function updates our state and does the necessary notifications.
4762 * Also notifies our clients that the neighbour is now officially
4765 * @param n the neighbour list entry for the peer
4766 * @param check GNUNET_YES to check if ALL addresses for this peer
4767 * are gone, GNUNET_NO to force a disconnect of the peer
4768 * regardless of whether other addresses exist.
4771 disconnect_neighbour (struct NeighbourList *n, int check)
4773 struct ReadyList *rpos;
4774 struct NeighbourList *npos;
4775 struct NeighbourList *nprev;
4776 struct MessageQueue *mq;
4777 struct ForeignAddressList *peer_addresses;
4778 struct ForeignAddressList *peer_pos;
4780 if (GNUNET_YES == check)
4783 while (NULL != rpos)
4785 peer_addresses = rpos->addresses;
4786 while (peer_addresses != NULL)
4788 if (GNUNET_YES == peer_addresses->connected)
4790 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4791 "NOT Disconnecting from `%4s', still have live addresses!\n",
4792 GNUNET_i2s (&n->id));
4793 return; /* still connected */
4795 peer_addresses = peer_addresses->next;
4801 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4802 "Disconnecting from `%4s'\n",
4803 GNUNET_i2s (&n->id));
4805 /* remove n from neighbours list */
4808 while ((npos != NULL) && (npos != n))
4813 GNUNET_assert (npos != NULL);
4815 neighbours = n->next;
4817 nprev->next = n->next;
4819 /* notify all clients about disconnect */
4820 if (GNUNET_YES == n->received_pong)
4821 notify_clients_disconnect (&n->id);
4823 /* clean up all plugins, cancel connections and pending transmissions */
4824 while (NULL != (rpos = n->plugins))
4826 n->plugins = rpos->next;
4827 rpos->plugin->api->disconnect (rpos->plugin->api->cls, &n->id);
4828 while (rpos->addresses != NULL)
4830 peer_pos = rpos->addresses;
4831 rpos->addresses = peer_pos->next;
4832 if (peer_pos->connected == GNUNET_YES)
4833 GNUNET_STATISTICS_update (stats,
4834 gettext_noop ("# connected addresses"),
4837 if (GNUNET_YES == peer_pos->validated)
4838 GNUNET_STATISTICS_update (stats,
4839 gettext_noop ("# peer addresses considered valid"),
4842 if (GNUNET_SCHEDULER_NO_TASK != peer_pos->revalidate_task)
4844 GNUNET_SCHEDULER_cancel (peer_pos->revalidate_task);
4845 peer_pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
4847 GNUNET_free(peer_pos->ressources);
4848 peer_pos->ressources = NULL;
4849 GNUNET_free(peer_pos->quality);
4850 peer_pos->ressources = NULL;
4851 GNUNET_free(peer_pos);
4856 /* free all messages on the queue */
4857 while (NULL != (mq = n->messages_head))
4859 GNUNET_STATISTICS_update (stats,
4860 gettext_noop ("# bytes in message queue for other peers"),
4861 - (int64_t) mq->message_buf_size,
4863 GNUNET_STATISTICS_update (stats,
4864 gettext_noop ("# bytes discarded due to disconnect"),
4865 mq->message_buf_size,
4867 GNUNET_CONTAINER_DLL_remove (n->messages_head,
4870 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
4872 sizeof(struct GNUNET_PeerIdentity)));
4875 if (n->timeout_task != GNUNET_SCHEDULER_NO_TASK)
4877 GNUNET_SCHEDULER_cancel (n->timeout_task);
4878 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4880 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4882 GNUNET_SCHEDULER_cancel (n->retry_task);
4883 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4885 if (n->piter != NULL)
4887 GNUNET_PEERINFO_iterate_cancel (n->piter);
4888 GNUNET_STATISTICS_update (stats,
4889 gettext_noop ("# outstanding peerinfo iterate requests"),
4894 /* finally, free n itself */
4895 GNUNET_STATISTICS_update (stats,
4896 gettext_noop ("# active neighbours"),
4899 GNUNET_free_non_null (n->pre_connect_message_buffer);
4905 * We have received a PING message from someone. Need to send a PONG message
4906 * in response to the peer by any means necessary.
4909 handle_ping(void *cls, const struct GNUNET_MessageHeader *message,
4910 const struct GNUNET_PeerIdentity *peer,
4911 struct Session *session,
4912 const char *sender_address,
4913 uint16_t sender_address_len)
4915 struct TransportPlugin *plugin = cls;
4916 struct SessionHeader *session_header = (struct SessionHeader*) session;
4917 struct TransportPingMessage *ping;
4918 struct TransportPongMessage *pong;
4919 struct NeighbourList *n;
4920 struct ReadyList *rl;
4921 struct ForeignAddressList *fal;
4922 struct OwnAddressList *oal;
4927 if (ntohs (message->size) < sizeof (struct TransportPingMessage))
4929 GNUNET_break_op (0);
4930 return GNUNET_SYSERR;
4933 ping = (struct TransportPingMessage *) message;
4934 if (0 != memcmp (&ping->target,
4935 plugin->env.my_identity,
4936 sizeof (struct GNUNET_PeerIdentity)))
4938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4939 _("Received `%s' message from `%s' destined for `%s' which is not me!\n"),
4941 (sender_address != NULL)
4942 ? a2s (plugin->short_name,
4943 (const struct sockaddr *)sender_address,
4946 GNUNET_i2s (&ping->target));
4947 return GNUNET_SYSERR;
4950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4951 "Processing `%s' from `%s'\n",
4953 (sender_address != NULL)
4954 ? a2s (plugin->short_name,
4955 (const struct sockaddr *)sender_address,
4959 GNUNET_STATISTICS_update (stats,
4960 gettext_noop ("# PING messages received"),
4963 addr = (const char*) &ping[1];
4964 alen = ntohs (message->size) - sizeof (struct TransportPingMessage);
4965 slen = strlen (plugin->short_name) + 1;
4968 /* peer wants to confirm that we have an outbound connection to him */
4969 if (session == NULL)
4971 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4972 _("Refusing to create PONG since I do not have a session with `%s'.\n"),
4974 return GNUNET_SYSERR;
4976 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + sender_address_len + slen);
4977 pong->header.size = htons (sizeof (struct TransportPongMessage) + sender_address_len + slen);
4978 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
4979 pong->purpose.size =
4980 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
4982 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
4983 sizeof (struct GNUNET_PeerIdentity) + sender_address_len + slen);
4984 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING);
4985 pong->challenge = ping->challenge;
4986 pong->addrlen = htonl(sender_address_len + slen);
4989 sizeof(struct GNUNET_PeerIdentity));
4993 if ((sender_address!=NULL) && (sender_address_len > 0))
4994 memcpy (&((char*)&pong[1])[slen],
4996 sender_address_len);
4997 if (GNUNET_TIME_absolute_get_remaining (session_header->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4)
4999 /* create / update cached sig */
5001 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5002 "Creating PONG signature to indicate active connection.\n");
5004 session_header->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5005 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5006 GNUNET_assert (GNUNET_OK ==
5007 GNUNET_CRYPTO_rsa_sign (my_private_key,
5009 &session_header->pong_signature));
5013 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5015 memcpy (&pong->signature,
5016 &session_header->pong_signature,
5017 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5023 /* peer wants to confirm that this is one of our addresses */
5027 plugin->api->check_address (plugin->api->cls,
5031 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5032 _("Not confirming PING with address `%s' since I cannot confirm having this address.\n"),
5033 a2s (plugin->short_name,
5038 oal = plugin->addresses;
5041 if ( (oal->addrlen == alen) &&
5048 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + alen + slen);
5049 pong->header.size = htons (sizeof (struct TransportPongMessage) + alen + slen);
5050 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5051 pong->purpose.size =
5052 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5054 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5055 sizeof (struct GNUNET_PeerIdentity) + alen + slen);
5056 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN);
5057 pong->challenge = ping->challenge;
5058 pong->addrlen = htonl(alen + slen);
5061 sizeof(struct GNUNET_PeerIdentity));
5062 memcpy (&pong[1], plugin->short_name, slen);
5063 memcpy (&((char*)&pong[1])[slen], addr, alen);
5064 if ( (oal != NULL) &&
5065 (GNUNET_TIME_absolute_get_remaining (oal->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4) )
5067 /* create / update cached sig */
5069 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5070 "Creating PONG signature to indicate ownership.\n");
5072 oal->pong_sig_expires = GNUNET_TIME_absolute_min (oal->expires,
5073 GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5074 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5075 GNUNET_assert (GNUNET_OK ==
5076 GNUNET_CRYPTO_rsa_sign (my_private_key,
5078 &oal->pong_signature));
5079 memcpy (&pong->signature,
5080 &oal->pong_signature,
5081 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5083 else if (oal == NULL)
5085 /* not using cache (typically DV-only) */
5086 pong->expiration = GNUNET_TIME_absolute_hton (GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5087 GNUNET_assert (GNUNET_OK ==
5088 GNUNET_CRYPTO_rsa_sign (my_private_key,
5094 /* can used cached version */
5095 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5096 memcpy (&pong->signature,
5097 &oal->pong_signature,
5098 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5101 n = find_neighbour(peer);
5102 GNUNET_assert (n != NULL);
5103 /* first try reliable response transmission */
5107 fal = rl->addresses;
5110 if (-1 != rl->plugin->api->send (rl->plugin->api->cls,
5113 ntohs (pong->header.size),
5114 TRANSPORT_PONG_PRIORITY,
5115 HELLO_VERIFICATION_TIMEOUT,
5123 GNUNET_STATISTICS_update (stats,
5124 gettext_noop ("# PONGs unicast via reliable transport"),
5134 /* no reliable method found, do multicast */
5135 GNUNET_STATISTICS_update (stats,
5136 gettext_noop ("# PONGs multicast to all available addresses"),
5142 fal = rl->addresses;
5145 transmit_to_peer(NULL, fal,
5146 TRANSPORT_PONG_PRIORITY,
5147 HELLO_VERIFICATION_TIMEOUT,
5149 ntohs(pong->header.size),
5165 * Function called by the plugin for each received message.
5166 * Update data volumes, possibly notify plugins about
5167 * reducing the rate at which they read from the socket
5168 * and generally forward to our receive callback.
5170 * @param cls the "struct TransportPlugin *" we gave to the plugin
5171 * @param peer (claimed) identity of the other peer
5172 * @param message the message, NULL if we only care about
5173 * learning about the delay until we should receive again
5174 * @param ats_data information for automatic transport selection
5175 * @param ats_count number of elements in ats not including 0-terminator
5176 * @param session identifier used for this session (can be NULL)
5177 * @param sender_address binary address of the sender (if observed)
5178 * @param sender_address_len number of bytes in sender_address
5179 * @return how long in ms the plugin should wait until receiving more data
5180 * (plugins that do not support this, can ignore the return value)
5182 static struct GNUNET_TIME_Relative
5183 plugin_env_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
5184 const struct GNUNET_MessageHeader *message,
5185 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
5187 struct Session *session,
5188 const char *sender_address,
5189 uint16_t sender_address_len)
5191 struct TransportPlugin *plugin = cls;
5192 struct ReadyList *service_context;
5193 struct ForeignAddressList *peer_address;
5195 struct NeighbourList *n;
5196 struct GNUNET_TIME_Relative ret;
5197 if (is_blacklisted (peer, plugin))
5198 return GNUNET_TIME_UNIT_FOREVER_REL;
5202 n = find_neighbour (peer);
5204 n = setup_new_neighbour (peer, GNUNET_YES);
5205 service_context = n->plugins;
5206 while ((service_context != NULL) && (plugin != service_context->plugin))
5207 service_context = service_context->next;
5208 GNUNET_assert ((plugin->api->send == NULL) || (service_context != NULL));
5209 peer_address = NULL;
5212 for (c=0; c<ats_count; c++)
5214 if (ntohl(ats_data[c].type) == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
5216 distance = ntohl(ats_data[c].value);
5220 /* notify ATS about incoming data */
5221 //ats_notify_ats_data(peer, ats_data);
5224 if (message != NULL)
5226 if ( (session != NULL) ||
5227 (sender_address != NULL) )
5228 peer_address = add_peer_address (n,
5232 sender_address_len);
5233 if (peer_address != NULL)
5236 update_addr_ats(peer_address, ats_data, ats_count);
5237 update_addr_value(peer_address, distance, GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5239 peer_address->distance = distance;
5240 if (GNUNET_YES == peer_address->validated)
5241 mark_address_connected (peer_address);
5242 peer_address->timeout
5244 GNUNET_TIME_relative_to_absolute
5245 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5246 schedule_next_ping (peer_address);
5248 /* update traffic received amount ... */
5249 msize = ntohs (message->size);
5251 GNUNET_STATISTICS_update (stats,
5252 gettext_noop ("# bytes received from other peers"),
5255 n->distance = distance;
5257 GNUNET_TIME_relative_to_absolute
5258 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5259 GNUNET_SCHEDULER_cancel (n->timeout_task);
5261 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
5262 &neighbour_timeout_task, n);
5263 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
5265 /* dropping message due to frequent inbound volume violations! */
5266 GNUNET_log (GNUNET_ERROR_TYPE_WARNING |
5267 GNUNET_ERROR_TYPE_BULK,
5269 ("Dropping incoming message due to repeated bandwidth quota (%u b/s) violations (total of %u).\n"),
5270 n->in_tracker.available_bytes_per_s__,
5271 n->quota_violation_count);
5272 GNUNET_STATISTICS_update (stats,
5273 gettext_noop ("# bandwidth quota violations by other peers"),
5276 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
5278 if ((ntohs(message->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_ATS) &&
5279 (ntohs(message->size) == (sizeof (struct GNUNET_MessageHeader) + sizeof (uint32_t))))
5281 uint32_t value = ntohl(*((uint32_t *) &message[1]));
5282 //GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "GNUNET_MESSAGE_TYPE_TRANSPORT_ATS: %i \n", value);
5283 /* Force ressource and quality update */
5286 ats->modified_resources = GNUNET_YES;
5287 ats->modified_quality = GNUNET_YES;
5289 /* Force cost update */
5291 ats->modified_resources = GNUNET_YES;
5292 /* Force quality update */
5294 ats->modified_quality = GNUNET_YES;
5295 /* Force full rebuild */
5297 ats->modified_addr = GNUNET_YES;
5301 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5302 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
5303 ntohs (message->type),
5304 ntohs (message->size),
5307 switch (ntohs (message->type))
5309 case GNUNET_MESSAGE_TYPE_HELLO:
5310 GNUNET_STATISTICS_update (stats,
5311 gettext_noop ("# HELLO messages received from other peers"),
5314 process_hello (plugin, message);
5316 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
5317 handle_ping (plugin, message, peer, session, sender_address, sender_address_len);
5319 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
5320 handle_pong (plugin, message, peer, sender_address, sender_address_len);
5322 case GNUNET_MESSAGE_TYPE_TRANSPORT_ATS:
5325 handle_payload_message (message, n);
5329 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 0);
5330 if (ret.rel_value > 0)
5332 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5333 "Throttling read (%llu bytes excess at %u b/s), waiting %llums before reading more.\n",
5334 (unsigned long long) n->in_tracker.consumption_since_last_update__,
5335 (unsigned int) n->in_tracker.available_bytes_per_s__,
5336 (unsigned long long) ret.rel_value);
5337 GNUNET_STATISTICS_update (stats,
5338 gettext_noop ("# ms throttling suggested"),
5339 (int64_t) ret.rel_value,
5346 * Handle START-message. This is the first message sent to us
5347 * by any client which causes us to add it to our list.
5349 * @param cls closure (always NULL)
5350 * @param client identification of the client
5351 * @param message the actual message
5354 handle_start (void *cls,
5355 struct GNUNET_SERVER_Client *client,
5356 const struct GNUNET_MessageHeader *message)
5358 const struct StartMessage *start;
5359 struct TransportClient *c;
5360 struct ConnectInfoMessage * cim;
5361 struct NeighbourList *n;
5365 start = (const struct StartMessage*) message;
5367 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5368 "Received `%s' request from client\n", "START");
5373 if (c->client == client)
5375 /* client already on our list! */
5377 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5382 if ( (GNUNET_NO != ntohl (start->do_check)) &&
5383 (0 != memcmp (&start->self,
5385 sizeof (struct GNUNET_PeerIdentity))) )
5387 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5388 _("Rejecting control connection from peer `%s', which is not me!\n"),
5389 GNUNET_i2s (&start->self));
5390 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5393 c = GNUNET_malloc (sizeof (struct TransportClient));
5397 if (our_hello != NULL)
5400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5401 "Sending our own `%s' to new client\n", "HELLO");
5403 transmit_to_client (c,
5404 (const struct GNUNET_MessageHeader *) our_hello,
5406 /* tell new client about all existing connections */
5408 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
5409 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
5413 cim = GNUNET_malloc (size);
5414 cim->header.size = htons (size);
5415 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
5416 cim->ats_count = htonl(ats_count);
5417 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
5418 (&(cim->ats))[2].value = htonl (0);
5422 if (GNUNET_YES == n->received_pong)
5424 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5425 (&(cim->ats))[0].value = htonl (n->distance);
5426 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
5427 (&(cim->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
5429 transmit_to_client (c, &cim->header, GNUNET_NO);
5435 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5440 * Handle HELLO-message.
5442 * @param cls closure (always NULL)
5443 * @param client identification of the client
5444 * @param message the actual message
5447 handle_hello (void *cls,
5448 struct GNUNET_SERVER_Client *client,
5449 const struct GNUNET_MessageHeader *message)
5453 GNUNET_STATISTICS_update (stats,
5454 gettext_noop ("# HELLOs received from clients"),
5457 ret = process_hello (NULL, message);
5458 GNUNET_SERVER_receive_done (client, ret);
5463 * Closure for 'transmit_client_message'; followed by
5464 * 'msize' bytes of the actual message.
5466 struct TransmitClientMessageContext
5469 * Client on whom's behalf we are sending.
5471 struct GNUNET_SERVER_Client *client;
5474 * Timeout for the transmission.
5476 struct GNUNET_TIME_Absolute timeout;
5484 * Size of the message in bytes.
5491 * Schedule transmission of a message we got from a client to a peer.
5493 * @param cls the 'struct TransmitClientMessageContext*'
5494 * @param n destination, or NULL on error (in that case, drop the message)
5497 transmit_client_message (void *cls,
5498 struct NeighbourList *n)
5500 struct TransmitClientMessageContext *tcmc = cls;
5501 struct TransportClient *tc;
5504 while ((tc != NULL) && (tc->client != tcmc->client))
5509 transmit_to_peer (tc, NULL, tcmc->priority,
5510 GNUNET_TIME_absolute_get_remaining (tcmc->timeout),
5512 tcmc->msize, GNUNET_NO, n);
5514 GNUNET_SERVER_receive_done (tcmc->client, GNUNET_OK);
5515 GNUNET_SERVER_client_drop (tcmc->client);
5521 * Handle SEND-message.
5523 * @param cls closure (always NULL)
5524 * @param client identification of the client
5525 * @param message the actual message
5528 handle_send (void *cls,
5529 struct GNUNET_SERVER_Client *client,
5530 const struct GNUNET_MessageHeader *message)
5532 const struct OutboundMessage *obm;
5533 const struct GNUNET_MessageHeader *obmm;
5534 struct TransmitClientMessageContext *tcmc;
5538 size = ntohs (message->size);
5540 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
5543 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5546 GNUNET_STATISTICS_update (stats,
5547 gettext_noop ("# payload received for other peers"),
5550 obm = (const struct OutboundMessage *) message;
5551 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
5552 msize = size - sizeof (struct OutboundMessage);
5554 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5555 "Received `%s' request from client with target `%4s' and message of type %u and size %u\n",
5556 "SEND", GNUNET_i2s (&obm->peer),
5560 tcmc = GNUNET_malloc (sizeof (struct TransmitClientMessageContext) + msize);
5561 tcmc->client = client;
5562 tcmc->priority = ntohl (obm->priority);
5563 tcmc->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_ntoh (obm->timeout));
5564 tcmc->msize = msize;
5565 /* FIXME: this memcpy can be up to 7% of our total runtime */
5566 memcpy (&tcmc[1], obmm, msize);
5567 GNUNET_SERVER_client_keep (client);
5568 setup_peer_check_blacklist (&obm->peer, GNUNET_YES,
5569 &transmit_client_message,
5575 * Handle request connect message
5577 * @param cls closure (always NULL)
5578 * @param client identification of the client
5579 * @param message the actual message
5582 handle_request_connect (void *cls,
5583 struct GNUNET_SERVER_Client *client,
5584 const struct GNUNET_MessageHeader *message)
5586 const struct TransportRequestConnectMessage *trcm =
5587 (const struct TransportRequestConnectMessage *) message;
5589 GNUNET_STATISTICS_update (stats,
5590 gettext_noop ("# REQUEST CONNECT messages received"),
5593 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Received a request connect message for peer %s\n", GNUNET_i2s(&trcm->peer));
5594 setup_peer_check_blacklist (&trcm->peer, GNUNET_YES,
5596 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5600 * Handle SET_QUOTA-message.
5602 * @param cls closure (always NULL)
5603 * @param client identification of the client
5604 * @param message the actual message
5607 handle_set_quota (void *cls,
5608 struct GNUNET_SERVER_Client *client,
5609 const struct GNUNET_MessageHeader *message)
5611 const struct QuotaSetMessage *qsm =
5612 (const struct QuotaSetMessage *) message;
5613 struct NeighbourList *n;
5615 GNUNET_STATISTICS_update (stats,
5616 gettext_noop ("# SET QUOTA messages received"),
5619 n = find_neighbour (&qsm->peer);
5622 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5623 GNUNET_STATISTICS_update (stats,
5624 gettext_noop ("# SET QUOTA messages ignored (no such peer)"),
5630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5631 "Received `%s' request (new quota %u, old quota %u) from client for peer `%4s'\n",
5633 (unsigned int) ntohl (qsm->quota.value__),
5634 (unsigned int) n->in_tracker.available_bytes_per_s__,
5635 GNUNET_i2s (&qsm->peer));
5637 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker,
5639 if (0 == ntohl (qsm->quota.value__))
5641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5642 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&n->id),
5644 disconnect_neighbour (n, GNUNET_NO);
5646 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5651 * Take the given address and append it to the set of results sent back to
5654 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
5655 * @param address the resolved name, NULL to indicate the last response
5658 transmit_address_to_client (void *cls, const char *address)
5660 struct GNUNET_SERVER_TransmitContext *tc = cls;
5663 if (NULL == address)
5666 slen = strlen (address) + 1;
5668 GNUNET_SERVER_transmit_context_append_data (tc, address, slen,
5669 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5670 if (NULL == address)
5671 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
5676 * Handle AddressLookup-message.
5678 * @param cls closure (always NULL)
5679 * @param client identification of the client
5680 * @param message the actual message
5683 handle_address_lookup (void *cls,
5684 struct GNUNET_SERVER_Client *client,
5685 const struct GNUNET_MessageHeader *message)
5687 const struct AddressLookupMessage *alum;
5688 struct TransportPlugin *lsPlugin;
5689 const char *nameTransport;
5690 const char *address;
5692 struct GNUNET_SERVER_TransmitContext *tc;
5693 struct GNUNET_TIME_Absolute timeout;
5694 struct GNUNET_TIME_Relative rtimeout;
5697 size = ntohs (message->size);
5698 if (size < sizeof (struct AddressLookupMessage))
5700 GNUNET_break_op (0);
5701 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5704 alum = (const struct AddressLookupMessage *) message;
5705 uint32_t addressLen = ntohl (alum->addrlen);
5706 if (size <= sizeof (struct AddressLookupMessage) + addressLen)
5708 GNUNET_break_op (0);
5709 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5712 address = (const char *) &alum[1];
5713 nameTransport = (const char *) &address[addressLen];
5715 [size - sizeof (struct AddressLookupMessage) - addressLen - 1] != '\0')
5717 GNUNET_break_op (0);
5718 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5721 timeout = GNUNET_TIME_absolute_ntoh (alum->timeout);
5722 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5723 numeric = ntohl (alum->numeric_only);
5724 lsPlugin = find_transport (nameTransport);
5725 if (NULL == lsPlugin)
5727 tc = GNUNET_SERVER_transmit_context_create (client);
5728 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5729 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5730 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
5733 tc = GNUNET_SERVER_transmit_context_create (client);
5734 lsPlugin->api->address_pretty_printer (lsPlugin->api->cls,
5736 address, addressLen,
5739 &transmit_address_to_client, tc);
5744 * Setup the environment for this plugin.
5747 create_environment (struct TransportPlugin *plug)
5749 plug->env.cfg = cfg;
5750 plug->env.my_identity = &my_identity;
5751 plug->env.our_hello = &our_hello;
5752 plug->env.cls = plug;
5753 plug->env.receive = &plugin_env_receive;
5754 plug->env.notify_address = &plugin_env_notify_address;
5755 plug->env.session_end = &plugin_env_session_end;
5756 plug->env.max_connections = max_connect_per_transport;
5757 plug->env.stats = stats;
5762 * Start the specified transport (load the plugin).
5765 start_transport (struct GNUNET_SERVER_Handle *server,
5768 struct TransportPlugin *plug;
5771 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5772 _("Loading `%s' transport plugin\n"), name);
5773 GNUNET_asprintf (&libname, "libgnunet_plugin_transport_%s", name);
5774 plug = GNUNET_malloc (sizeof (struct TransportPlugin));
5775 create_environment (plug);
5776 plug->short_name = GNUNET_strdup (name);
5777 plug->lib_name = libname;
5778 plug->next = plugins;
5780 plug->api = GNUNET_PLUGIN_load (libname, &plug->env);
5781 if (plug->api == NULL)
5783 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5784 _("Failed to load transport plugin for `%s'\n"), name);
5785 GNUNET_free (plug->short_name);
5786 plugins = plug->next;
5787 GNUNET_free (libname);
5794 * Called whenever a client is disconnected. Frees our
5795 * resources associated with that client.
5797 * @param cls closure
5798 * @param client identification of the client
5801 client_disconnect_notification (void *cls,
5802 struct GNUNET_SERVER_Client *client)
5804 struct TransportClient *pos;
5805 struct TransportClient *prev;
5806 struct ClientMessageQueueEntry *mqe;
5807 struct Blacklisters *bl;
5808 struct BlacklistCheck *bc;
5813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
5814 "Client disconnected, cleaning up.\n");
5816 /* clean up blacklister */
5820 if (bl->client == client)
5825 if (bc->bl_pos == bl)
5827 bc->bl_pos = bl->next;
5830 GNUNET_CONNECTION_notify_transmit_ready_cancel (bc->th);
5833 if (bc->task == GNUNET_SCHEDULER_NO_TASK)
5834 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
5840 GNUNET_CONTAINER_DLL_remove (bl_head,
5843 GNUNET_SERVER_client_drop (bl->client);
5849 /* clean up 'normal' clients */
5852 while ((pos != NULL) && (pos->client != client))
5859 while (NULL != (mqe = pos->message_queue_head))
5861 GNUNET_CONTAINER_DLL_remove (pos->message_queue_head,
5862 pos->message_queue_tail,
5864 pos->message_count--;
5868 clients = pos->next;
5870 prev->next = pos->next;
5871 if (GNUNET_YES == pos->tcs_pending)
5876 if (pos->th != NULL)
5878 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
5881 GNUNET_break (0 == pos->message_count);
5887 * Function called when the service shuts down. Unloads our plugins
5888 * and cancels pending validations.
5890 * @param cls closure, unused
5891 * @param tc task context (unused)
5894 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5896 struct TransportPlugin *plug;
5897 struct OwnAddressList *al;
5898 struct CheckHelloValidatedContext *chvc;
5900 while (neighbours != NULL)
5902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5903 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&neighbours->id),
5905 disconnect_neighbour (neighbours, GNUNET_NO);
5908 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5909 "Transport service is unloading plugins...\n");
5911 while (NULL != (plug = plugins))
5913 plugins = plug->next;
5914 if (plug->address_update_task != GNUNET_SCHEDULER_NO_TASK)
5916 GNUNET_SCHEDULER_cancel (plug->address_update_task);
5917 plug->address_update_task = GNUNET_SCHEDULER_NO_TASK;
5919 GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
5920 GNUNET_free (plug->lib_name);
5921 GNUNET_free (plug->short_name);
5922 while (NULL != (al = plug->addresses))
5924 plug->addresses = al->next;
5929 if (my_private_key != NULL)
5930 GNUNET_CRYPTO_rsa_key_free (my_private_key);
5931 GNUNET_free_non_null (our_hello);
5933 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
5936 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
5937 validation_map = NULL;
5941 /* free 'chvc' data structure */
5942 while (NULL != (chvc = chvc_head))
5944 chvc_head = chvc->next;
5945 if (chvc->piter != NULL)
5947 GNUNET_PEERINFO_iterate_cancel (chvc->piter);
5948 GNUNET_STATISTICS_update (stats,
5949 gettext_noop ("# outstanding peerinfo iterate requests"),
5955 GNUNET_assert (chvc->ve_count == 0);
5962 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
5965 if (peerinfo != NULL)
5967 GNUNET_PEERINFO_disconnect (peerinfo);
5970 /* Can we assume those are gone by now, or do we need to clean up
5972 GNUNET_break (bl_head == NULL);
5973 GNUNET_break (bc_head == NULL);
5977 static int ats_evaluate_results (int result, int solution, char * problem)
5979 int cont = GNUNET_NO;
5980 int error_kind = GNUNET_ERROR_TYPE_DEBUG;
5982 error_kind = GNUNET_ERROR_TYPE_ERROR;
5986 case GLP_ESTOP : /* search terminated by application */
5987 GNUNET_log (error_kind, "%s , Search terminated by application ", problem);
5989 case GLP_EITLIM : /* iteration limit exceeded */
5990 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Iteration limit exceeded ", problem);
5993 case GLP_ETMLIM : /* time limit exceeded */
5994 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s Time limit exceeded ", problem);
5996 case GLP_ENOPFS : /* no primal feasible solution */
5997 case GLP_ENODFS : /* no dual feasible solution */
5998 GNUNET_log (error_kind, "%s No feasible solution", problem);
6001 case GLP_EBADB : /* invalid basis */
6002 case GLP_ESING : /* singular matrix */
6003 case GLP_ECOND : /* ill-conditioned matrix */
6004 case GLP_EBOUND : /* invalid bounds */
6005 case GLP_EFAIL : /* solver failed */
6006 case GLP_EOBJLL : /* objective lower limit reached */
6007 case GLP_EOBJUL : /* objective upper limit reached */
6008 case GLP_EROOT : /* root LP optimum not provided */
6009 GNUNET_log (error_kind, "%s Invalid Input data: %i\n", problem, result);
6013 GNUNET_log (error_kind, "%s Problem has been solved\n", problem);
6019 GNUNET_log (error_kind, "%s solution is undefined\n", problem);
6022 GNUNET_log (error_kind, "%s solution is optimal\n", problem);
6026 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"));
6030 GNUNET_log (error_kind, "%s problem has no %sfeasible solution\n", problem, (0==strcmp(problem,"LP")?"":"integer "));
6033 GNUNET_log (error_kind, "%s problem is infeasible \n", problem);
6036 GNUNET_log (error_kind, "%s problem is unbounded \n", problem);
6043 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)
6052 glp_init_smcp(&opt_lp);
6054 opt_lp.msg_lev = GLP_MSG_ALL;
6056 opt_lp.msg_lev = GLP_MSG_OFF;
6059 // setting iteration limit
6060 opt_lp.it_lim = max_it;
6062 opt_lp.tm_lim = max_dur;
6064 if (ats->modified_addr == GNUNET_YES)
6065 opt_lp.presolve = GLP_ON;
6066 result = glp_simplex(ats->prob, &opt_lp);
6067 lp_solution = glp_get_status (ats->prob);
6069 if ((result == GLP_ETMLIM) || (result == GLP_ETMLIM))
6071 ats->stat.valid = GNUNET_NO;
6072 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ATS exceeded time or iteration limit!\n");
6076 if (ats_evaluate_results(result, lp_solution, "LP") == GNUNET_YES)
6078 stat->valid = GNUNET_YES;
6082 ats->simplex_rerun_required = GNUNET_YES;
6083 opt_lp.presolve = GLP_ON;
6084 result = glp_simplex(ats->prob, &opt_lp);
6085 lp_solution = glp_get_status (ats->prob);
6087 // TODO: Remove if this does not appear until release
6088 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "EXECUTED SIMPLEX WITH PRESOLVER! %i", lp_solution);
6090 if (ats_evaluate_results(result, lp_solution, "LP") != GNUNET_YES)
6092 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "After execution simplex with presolver: STILL INVALID!\n");
6094 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);
6095 glp_write_lp (ats->prob, NULL, filename);
6096 GNUNET_free (filename);
6097 stat->valid = GNUNET_NO;
6100 stat->valid = GNUNET_YES;
6105 glp_init_iocp(&opt_mlp);
6107 opt_mlp.tm_lim = max_dur;
6110 opt_mlp.msg_lev = GLP_MSG_ALL;
6112 opt_mlp.msg_lev = GLP_MSG_OFF;
6115 result = glp_intopt (ats->prob, &opt_mlp);
6116 mlp_solution = glp_mip_status (ats->prob);
6117 stat->solution = mlp_solution;
6119 if (ats_evaluate_results(result, mlp_solution, "MLP") == GNUNET_YES)
6121 stat->valid = GNUNET_YES;
6125 // TODO: Remove if this does not appear until release
6126 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "MLP SOLUTION INVALID: %i\n", lp_solution);
6127 stat->valid = GNUNET_NO;
6132 int error = GNUNET_NO;
6134 struct ATS_mechanism *t = NULL;
6135 for (c=1; c<= (c_peers); c++ )
6138 t = peers[c].m_head;
6141 bw = glp_get_col_prim(prob, t->col_index);
6145 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);
6147 if (check ==GNUNET_YES)
6149 glp_write_sol(prob, "invalid_solution.mlp");
6150 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Invalid solution, check invalid_solution.mlp");
6151 GNUNET_STATISTICS_update (stats, "ATS invalid solutions", 1, GNUNET_NO);
6154 if (check ==GNUNET_NO)
6162 if (glp_get_col_prim(ats->prob,2*c_mechs+1) != 1)
6165 for (c=1; c<= available_quality_metrics; c++ )
6167 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));
6169 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));
6170 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));
6171 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));
6172 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "objective value: %f\n", glp_mip_obj_val(ats->prob));
6177 static void ats_delete_problem ()
6181 for (c=0; c< (ats->stat).c_mechs; c++)
6182 GNUNET_free_non_null (ats->mechanisms[c].rc);
6184 if (ats->mechanisms!=NULL)
6186 GNUNET_free(ats->mechanisms);
6187 ats->mechanisms = NULL;
6189 if (ats->peers!=NULL)
6191 GNUNET_free(ats->peers);
6195 if (ats->prob != NULL)
6197 glp_delete_prob(ats->prob);
6201 ats->stat.begin_cr = GNUNET_SYSERR;
6202 ats->stat.begin_qm = GNUNET_SYSERR;
6203 ats->stat.c_mechs = 0;
6204 ats->stat.c_peers = 0;
6205 ats->stat.end_cr = GNUNET_SYSERR;
6206 ats->stat.end_qm = GNUNET_SYSERR;
6207 ats->stat.solution = GNUNET_SYSERR;
6208 ats->stat.valid = GNUNET_SYSERR;
6212 static void ats_update_problem_qm ()
6217 int c_q_metrics = available_quality_metrics;
6219 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6220 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6222 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6224 row_index = ats->stat.begin_qm;
6226 for (c=1; c <= c_q_metrics; c++)
6231 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6234 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6235 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6237 ja[array_index] = c2;
6239 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
6241 double v0 = 0, v1 = 0, v2 = 0;
6242 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6243 if (v1 < 1) v0 = 0.1;
6244 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6245 if (v1 < 1) v0 = 0.1;
6246 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6247 if (v1 < 1) v0 = 0.1;
6248 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
6251 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
6253 double v0 = 0, v1 = 0, v2 = 0;
6254 v0 = ats->mechanisms[c2].addr->quality[c-1].values[0];
6256 v1 = ats->mechanisms[c2].addr->quality[c-1].values[1];
6258 v2 = ats->mechanisms[c2].addr->quality[c-1].values[2];
6260 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
6262 value = (double) 10 / value;
6266 ar[array_index] = (ats->mechanisms[c2].peer->f) * value;
6268 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]);
6272 ja[array_index] = ats->stat.col_qm + c - 1;
6273 ar[array_index] = -1;
6276 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6278 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6284 GNUNET_free_non_null (ja);
6285 GNUNET_free_non_null (ar);
6289 static void ats_update_problem_cr ()
6295 double ct_max, ct_min;
6297 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6298 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6300 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics\n");
6301 row_index = ats->stat.begin_cr;
6303 for (c=0; c<available_ressources; c++)
6305 ct_max = ressources[c].c_max;
6306 ct_min = ressources[c].c_min;
6308 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
6310 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
6312 for (c2=1; c2<=ats->stat.c_mechs; c2++)
6315 ja[array_index] = c2;
6316 value = ats->mechanisms[c2].addr->ressources[c].c;
6317 ar[array_index] = value;
6319 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, row_index, ja[array_index], ar[array_index]);
6323 glp_set_mat_row (ats->prob, row_index, array_index, ja, ar);
6329 GNUNET_free_non_null (ja);
6330 GNUNET_free_non_null (ar);
6335 static void ats_update_problem_qm_TEST ()
6340 int old_ja[ats->stat.c_mechs + 2];
6341 double old_ar[ats->stat.c_mechs + 2];
6345 int *ja = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (int));
6346 double *ar = GNUNET_malloc ((1 + ats->stat.c_mechs*2 + 3 + available_quality_metrics) * sizeof (double));
6348 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Updating problem quality metrics TEST\n");
6350 if (ats->stat.begin_qm >0)
6351 row_index = ats->stat.begin_qm;
6356 for (c=0; c<available_quality_metrics; c++)
6359 c_old = glp_get_mat_row (ats->prob, row_index, old_ja, old_ar);
6361 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6363 for (c2=1; c2<=c_old; c2++)
6365 ja[c2] = old_ja[c2];
6366 if ((changed < 3) && (c2>2) && (old_ar[c2] != -1))
6368 ar[c2] = old_ar[c2] + 5 - changed;
6372 ar[c2] = old_ar[c2];
6374 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]);
6377 glp_set_mat_row (ats->prob, row_index, c_old, ja, ar);
6382 GNUNET_free_non_null (ja);
6383 GNUNET_free_non_null (ar);
6388 /** solve the bandwidth distribution problem
6389 * @param max_it maximum iterations
6390 * @param max_dur maximum duration in ms
6391 * @param D weight for diversity
6392 * @param U weight for utility
6393 * @param R weight for relativity
6394 * @param v_b_min minimal bandwidth per peer
6395 * @param v_n_min minimum number of connections
6396 * @param stat result struct
6397 * @return GNUNET_SYSERR if glpk is not available, number of mechanisms used
6399 static int ats_create_problem (double D, double U, double R, int v_b_min, int v_n_min, struct ATS_stat *stat)
6401 if (ats->prob != NULL)
6402 glp_delete_prob(ats->prob);
6404 ats->prob = glp_create_prob();
6410 int c_c_ressources = available_ressources;
6411 int c_q_metrics = available_quality_metrics;
6413 double M = VERY_BIG_DOUBLE_VALUE;
6414 double Q[c_q_metrics+1];
6415 for (c=1; c<=c_q_metrics; c++)
6420 struct NeighbourList *next = neighbours;
6423 struct ReadyList *r_next = next->plugins;
6424 while (r_next != NULL)
6426 struct ForeignAddressList * a_next = r_next->addresses;
6427 while (a_next != NULL)
6430 a_next = a_next->next;
6432 r_next = r_next->next;
6441 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "No addresses for bw distribution available\n", c_peers);
6443 stat->valid = GNUNET_NO;
6446 return GNUNET_SYSERR;
6449 ats->mechanisms = GNUNET_malloc((1+c_mechs) * sizeof (struct ATS_mechanism));
6450 ats->peers = GNUNET_malloc((1+c_peers) * sizeof (struct ATS_peer));
6452 struct ATS_mechanism * mechanisms = ats->mechanisms;
6453 struct ATS_peer * peers = ats->peers;
6460 peers[c_peers].peer = next->id;
6461 peers[c_peers].m_head = NULL;
6462 peers[c_peers].m_tail = NULL;
6464 peers[c_peers].f = 1.0 / c_mechs;
6466 struct ReadyList *r_next = next->plugins;
6467 while (r_next != NULL)
6469 struct ForeignAddressList * a_next = r_next->addresses;
6470 while (a_next != NULL)
6472 mechanisms[c_mechs].addr = a_next;
6473 mechanisms[c_mechs].col_index = c_mechs;
6474 mechanisms[c_mechs].peer = &peers[c_peers];
6475 mechanisms[c_mechs].next = NULL;
6476 mechanisms[c_mechs].plugin = r_next->plugin;
6478 GNUNET_CONTAINER_DLL_insert_tail(peers[c_peers].m_head, peers[c_peers].m_tail, &mechanisms[c_mechs]);
6480 a_next = a_next->next;
6482 r_next = r_next->next;
6490 if (v_n_min > c_peers)
6494 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);
6497 int size = 1 + 3 + 10 *c_mechs + c_peers + (c_q_metrics*c_mechs)+ c_q_metrics + c_c_ressources * c_mechs ;
6500 int * ia = GNUNET_malloc (size * sizeof (int));
6501 int * ja = GNUNET_malloc (size * sizeof (int));
6502 double * ar = GNUNET_malloc(size* sizeof (double));
6504 glp_set_prob_name(ats->prob, "gnunet ats bandwidth distribution");
6505 glp_set_obj_dir(ats->prob, GLP_MAX);
6507 /* adding columns */
6509 glp_add_cols(ats->prob, 2 * c_mechs);
6510 /* adding b_t cols */
6511 for (c=1; c <= c_mechs; c++)
6514 GNUNET_asprintf(&name, "p_%s_b%i",GNUNET_i2s(&(mechanisms[c].peer->peer)), c);
6515 glp_set_col_name(ats->prob, c, name);
6517 glp_set_col_bnds(ats->prob, c, GLP_LO, 0.0, 0.0);
6518 glp_set_obj_coef(ats->prob, c, 0);
6521 /* adding n_t cols */
6522 for (c=c_mechs+1; c <= 2*c_mechs; c++)
6524 GNUNET_asprintf(&name, "p_%s_n%i",GNUNET_i2s(&(mechanisms[c-c_mechs].peer->peer)),(c-c_mechs));
6525 glp_set_col_name(ats->prob, c, name);
6527 glp_set_col_bnds(ats->prob, c, GLP_DB, 0.0, 1.0);
6528 glp_set_col_kind(ats->prob, c, GLP_IV);
6529 glp_set_obj_coef(ats->prob, c, 0);
6532 /* feasibility constraints */
6533 /* Constraint 1: one address per peer*/
6535 glp_add_rows(ats->prob, c_peers);
6536 for (c=1; c<=c_peers; c++)
6538 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 1.0, 1.0);
6540 struct ATS_mechanism *m = peers[c].m_head;
6543 ia[array_index] = row_index;
6544 ja[array_index] = (c_mechs + m->col_index);
6545 ar[array_index] = 1;
6547 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6555 /* Constraint 2: only active mechanism gets bandwidth assigned */
6556 glp_add_rows(ats->prob, c_mechs);
6557 for (c=1; c<=c_mechs; c++)
6559 /* b_t - n_t * M <= 0 */
6561 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6563 glp_set_row_bnds(ats->prob, row_index, GLP_UP, 0.0, 0.0);
6565 ia[array_index] = row_index;
6566 ja[array_index] = mechanisms[c].col_index;
6567 ar[array_index] = 1;
6569 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6572 ia[array_index] = row_index;
6573 ja[array_index] = c_mechs + mechanisms[c].col_index;
6574 ar[array_index] = -M;
6576 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6582 /* Constraint 3: minimum bandwidth*/
6583 glp_add_rows(ats->prob, c_mechs);
6584 for (c=1; c<=c_mechs; c++)
6586 /* b_t - n_t * b_min <= 0 */
6588 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6590 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
6592 ia[array_index] = row_index;
6593 ja[array_index] = mechanisms[c].col_index;
6594 ar[array_index] = 1;
6596 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6599 ia[array_index] = row_index;
6600 ja[array_index] = c_mechs + mechanisms[c].col_index;
6601 ar[array_index] = -v_b_min;
6603 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6609 /* Constraint 4: max ressource capacity */
6610 /* V cr: bt * ct_r <= cr_max
6612 glp_add_rows(ats->prob, available_ressources);
6613 double ct_max = VERY_BIG_DOUBLE_VALUE;
6614 double ct_min = 0.0;
6616 stat->begin_cr = array_index;
6618 for (c=0; c<available_ressources; c++)
6620 ct_max = ressources[c].c_max;
6621 ct_min = ressources[c].c_min;
6623 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] %f..%f\n",row_index, ct_min, ct_max);
6625 glp_set_row_bnds(ats->prob, row_index, GLP_DB, ct_min, ct_max);
6627 for (c2=1; c2<=c_mechs; c2++)
6630 ia[array_index] = row_index;
6631 ja[array_index] = c2;
6632 value = mechanisms[c2].addr->ressources[c].c;
6633 ar[array_index] = value;
6635 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6641 stat->end_cr = array_index--;
6643 /* Constraint 5: min number of connections*/
6644 glp_add_rows(ats->prob, 1);
6645 for (c=1; c<=c_mechs; c++)
6647 // b_t - n_t * b_min >= 0
6649 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6651 glp_set_row_bnds(ats->prob, row_index, GLP_LO, v_n_min, 0.0);
6653 ia[array_index] = row_index;
6654 ja[array_index] = c_mechs + mechanisms[c].col_index;
6655 ar[array_index] = 1;
6657 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6663 // optimisation constraints
6667 // Constraint 6: optimize for diversity
6669 col_d = glp_add_cols(ats->prob, 1);
6670 stat->col_d = col_d;
6671 //GNUNET_assert (col_d == (2*c_mechs) + 1);
6672 glp_set_col_name(ats->prob, col_d, "d");
6673 glp_set_obj_coef(ats->prob, col_d, D);
6674 glp_set_col_bnds(ats->prob, col_d, GLP_LO, 0.0, 0.0);
6675 glp_add_rows(ats->prob, 1);
6677 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6679 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6680 for (c=1; c<=c_mechs; c++)
6682 // b_t - n_t * b_min >= 0
6683 ia[array_index] = row_index;
6684 ja[array_index] = c_mechs + mechanisms[c].col_index;
6685 ar[array_index] = 1;
6687 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6691 ia[array_index] = row_index;
6692 ja[array_index] = col_d;
6693 ar[array_index] = -1;
6695 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6701 // Constraint 7: optimize for quality
6703 col_qm = glp_add_cols(ats->prob, c_q_metrics);
6704 stat->col_qm = col_qm;
6705 //GNUNET_assert (col_qm == (2*c_mechs) + 3 + 1);
6706 for (c=0; c< c_q_metrics; c++)
6708 GNUNET_asprintf(&name, "Q_%s",qm[c].name);
6709 glp_set_col_name(ats->prob, col_qm + c, name);
6710 glp_set_col_bnds(ats->prob, col_qm + c, GLP_LO, 0.0, 0.0);
6712 glp_set_obj_coef(ats->prob, col_qm + c, Q[c]);
6714 glp_add_rows(ats->prob, available_quality_metrics);
6715 stat->begin_qm = row_index;
6716 for (c=1; c <= c_q_metrics; c++)
6719 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6722 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6723 for (c2=1; c2<=c_mechs; c2++)
6726 ia[array_index] = row_index;
6727 ja[array_index] = c2;
6728 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY)
6730 double v0 = 0, v1 = 0, v2 = 0;
6731 v0 = mechanisms[c2].addr->quality[c-1].values[0];
6732 if (v1 < 1) v0 = 0.1;
6733 v1 = mechanisms[c2].addr->quality[c-1].values[1];
6734 if (v1 < 1) v0 = 0.1;
6735 v2 = mechanisms[c2].addr->quality[c-1].values[2];
6736 if (v1 < 1) v0 = 0.1;
6737 value = 100.0 / ((v0 + 2 * v1 + 3 * v2) / 6.0);
6740 if (qm[c-1].atis_index == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
6742 double v0 = 0, v1 = 0, v2 = 0;
6743 v0 = mechanisms[c2].addr->quality[c-1].values[0];
6745 v1 = mechanisms[c2].addr->quality[c-1].values[1];
6747 v2 = mechanisms[c2].addr->quality[c-1].values[2];
6749 value = (v0 + 2 * v1 + 3 * v2) / 6.0;
6751 value = (double) 10 / value;
6755 ar[array_index] = (mechanisms[c2].peer->f) * value ;
6757 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]);
6762 ia[array_index] = row_index;
6763 ja[array_index] = col_qm + c - 1;
6764 ar[array_index] = -1;
6766 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6771 stat->end_qm = row_index-1;
6773 // Constraint 8: optimize bandwidth utility
6775 col_u = glp_add_cols(ats->prob, 1);
6776 stat->col_u = col_u;
6777 //GNUNET_assert (col_u == (2*c_mechs) + 2);
6778 glp_set_col_name(ats->prob, col_u, "u");
6779 glp_set_obj_coef(ats->prob, col_u, U);
6780 glp_set_col_bnds(ats->prob, col_u, GLP_LO, 0.0, 0.0);
6781 glp_add_rows(ats->prob, 1);
6783 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "bounds [row]=[%i] \n",row_index);
6785 glp_set_row_bnds(ats->prob, row_index, GLP_FX, 0.0, 0.0);
6786 for (c=1; c<=c_mechs; c++)
6788 ia[array_index] = row_index;
6789 ja[array_index] = c;
6790 ar[array_index] = mechanisms[c].peer->f;
6792 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6796 ia[array_index] = row_index;
6797 ja[array_index] = col_u;
6798 ar[array_index] = -1;
6800 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6806 // Constraint 9: optimize relativity
6808 col_r = glp_add_cols(ats->prob, 1);
6809 stat->col_r = col_r;
6810 //GNUNET_assert (col_r == (2*c_mechs) + 3);
6811 glp_set_col_name(ats->prob, col_r, "r");
6812 glp_set_obj_coef(ats->prob, col_r, R);
6813 glp_set_col_bnds(ats->prob, col_r, GLP_LO, 0.0, 0.0);
6814 glp_add_rows(ats->prob, c_peers);
6815 for (c=1; c<=c_peers; c++)
6817 glp_set_row_bnds(ats->prob, row_index, GLP_LO, 0.0, 0.0);
6819 struct ATS_mechanism *m = peers[c].m_head;
6822 ia[array_index] = row_index;
6823 ja[array_index] = m->col_index;
6824 ar[array_index] = 1 / mechanisms[c].peer->f;
6826 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6831 ia[array_index] = row_index;
6832 ja[array_index] = col_r;
6833 ar[array_index] = -1;
6835 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "[index]=[%i]: [%i,%i]=%f \n",array_index, ia[array_index], ja[array_index], ar[array_index]);
6842 /* Loading the matrix */
6843 glp_load_matrix(ats->prob, array_index-1, ia, ja, ar);
6845 stat->c_mechs = c_mechs;
6846 stat->c_peers = c_peers;
6848 stat->valid = GNUNET_YES;
6860 void ats_notify_ats_data (
6861 const struct GNUNET_PeerIdentity *peer,
6862 const struct GNUNET_TRANSPORT_ATS_Information *ats_data)
6865 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ATS_notify_ats_data: %s\n",GNUNET_i2s(peer));
6867 ats_calculate_bandwidth_distribution();
6869 #endif //END: HAVE_LIBGLPK
6872 ats_calculate_bandwidth_distribution ()
6875 struct GNUNET_TIME_Absolute start;
6876 struct GNUNET_TIME_Relative creation;
6877 struct GNUNET_TIME_Relative solving;
6878 char *text = "unmodified";
6880 struct GNUNET_TIME_Relative delta = GNUNET_TIME_absolute_get_difference (ats->last, GNUNET_TIME_absolute_get());
6881 if (delta.rel_value < ats->min_delta.rel_value)
6884 GNUNET_log (GNUNET_ERROR_TYPE_BULK, "Minimum time between cycles not reached\n");
6890 if (INT_MAX < ats->max_exec_duration.rel_value)
6893 dur = (int) ats->max_exec_duration.rel_value;
6894 ats->simplex_rerun_required = GNUNET_NO;
6896 start = GNUNET_TIME_absolute_get();
6897 if ((ats->modified_addr == GNUNET_YES) || (ats->prob==NULL))
6900 ats->modified_addr = GNUNET_YES;
6901 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;
7141 ats_delete_problem ();
7148 void ats_notify_peer_connect (
7149 const struct GNUNET_PeerIdentity *peer,
7150 const struct GNUNET_TRANSPORT_ATS_Information *ats_data, int ats_count)
7153 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_connect: %s\n",GNUNET_i2s(peer));
7155 //update_addr_ats();
7156 ats->modified_addr = GNUNET_YES;
7158 ats_calculate_bandwidth_distribution(ats);
7161 void ats_notify_peer_disconnect (
7162 const struct GNUNET_PeerIdentity *peer)
7165 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "ats_notify_peer_disconnect: %s\n",GNUNET_i2s(peer));
7168 ats->modified_addr = GNUNET_YES;
7170 ats_calculate_bandwidth_distribution (ats);
7173 struct ForeignAddressList * ats_get_preferred_address (
7174 struct NeighbourList *n)
7177 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "ats_get_prefered_transport for peer: %s\n",GNUNET_i2s(&n->id));
7179 struct ReadyList *next = n->plugins;
7180 while (next != NULL)
7183 //GNUNET_log (GNUNET_ERROR_TYPE_BULK, "plugin: %s %i\n",next->plugin->short_name,strcmp(next->plugin->short_name,"unix"));
7187 return find_ready_address(n);
7191 * Initiate transport service.
7193 * @param cls closure
7194 * @param server the initialized server
7195 * @param c configuration to use
7199 struct GNUNET_SERVER_Handle *server,
7200 const struct GNUNET_CONFIGURATION_Handle *c)
7202 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
7203 {&handle_start, NULL,
7204 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
7205 {&handle_hello, NULL,
7206 GNUNET_MESSAGE_TYPE_HELLO, 0},
7207 {&handle_send, NULL,
7208 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
7209 {&handle_request_connect, NULL,
7210 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT, sizeof(struct TransportRequestConnectMessage)},
7211 {&handle_set_quota, NULL,
7212 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
7213 {&handle_address_lookup, NULL,
7214 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP,
7216 {&handle_blacklist_init, NULL,
7217 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT, sizeof (struct GNUNET_MessageHeader)},
7218 {&handle_blacklist_reply, NULL,
7219 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY, sizeof (struct BlacklistMessage)},
7225 unsigned long long tneigh;
7229 stats = GNUNET_STATISTICS_create ("transport", cfg);
7230 validation_map = GNUNET_CONTAINER_multihashmap_create (64);
7231 /* parse configuration */
7233 GNUNET_CONFIGURATION_get_value_number (c,
7238 GNUNET_CONFIGURATION_get_value_filename (c,
7240 "HOSTKEY", &keyfile)))
7242 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7244 ("Transport service is lacking key configuration settings. Exiting.\n"));
7245 GNUNET_SCHEDULER_shutdown ();
7248 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7251 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7252 validation_map = NULL;
7256 max_connect_per_transport = (uint32_t) tneigh;
7257 peerinfo = GNUNET_PEERINFO_connect (cfg);
7258 if (peerinfo == NULL)
7260 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7261 _("Could not access PEERINFO service. Exiting.\n"));
7262 GNUNET_SCHEDULER_shutdown ();
7265 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7268 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7269 validation_map = NULL;
7270 GNUNET_free (keyfile);
7273 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
7274 GNUNET_free (keyfile);
7275 if (my_private_key == NULL)
7277 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7279 ("Transport service could not access hostkey. Exiting.\n"));
7280 GNUNET_SCHEDULER_shutdown ();
7283 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
7286 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
7287 validation_map = NULL;
7290 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
7291 GNUNET_CRYPTO_hash (&my_public_key,
7292 sizeof (my_public_key), &my_identity.hashPubKey);
7293 /* setup notification */
7294 GNUNET_SERVER_disconnect_notify (server,
7295 &client_disconnect_notification, NULL);
7296 /* load plugins... */
7299 GNUNET_CONFIGURATION_get_value_string (c,
7300 "TRANSPORT", "PLUGINS", &plugs))
7302 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
7303 _("Starting transport plugins `%s'\n"), plugs);
7304 pos = strtok (plugs, " ");
7307 start_transport (server, pos);
7309 pos = strtok (NULL, " ");
7311 GNUNET_free (plugs);
7313 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
7314 &shutdown_task, NULL);
7321 GNUNET_log (GNUNET_ERROR_TYPE_INFO, _("Transport service ready.\n"));
7323 /* If we have a blacklist file, read from it */
7324 read_blacklist_file(cfg);
7325 /* process client requests */
7326 GNUNET_SERVER_add_handlers (server, handlers);
7331 * The main function for the transport service.
7333 * @param argc number of arguments from the command line
7334 * @param argv command line arguments
7335 * @return 0 ok, 1 on error
7338 main (int argc, char *const *argv)
7340 a2s (NULL, NULL, 0); /* make compiler happy */
7341 return (GNUNET_OK ==
7342 GNUNET_SERVICE_run (argc,
7345 GNUNET_SERVICE_OPTION_NONE,
7346 &run, NULL)) ? 0 : 1;
7349 /* end of gnunet-service-transport.c */