2 This file is part of GNUnet.
3 (C) 2009, 2010 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
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"
41 #include "transport_ats.h"
44 #define DEBUG_BLACKLIST GNUNET_NO
46 #define DEBUG_PING_PONG GNUNET_NO
48 #define DEBUG_TRANSPORT_HELLO GNUNET_NO
51 * Should we do some additional checks (to validate behavior
54 #define EXTRA_CHECKS GNUNET_YES
57 * How many messages can we have pending for a given client process
58 * before we start to drop incoming messages? We typically should
59 * have only one client and so this would be the primary buffer for
60 * messages, so the number should be chosen rather generously.
62 * The expectation here is that most of the time the queue is large
63 * enough so that a drop is virtually never required. Note that
64 * this value must be about as large as 'TOTAL_MSGS' in the
65 * 'test_transport_api_reliability.c', otherwise that testcase may
68 #define MAX_PENDING (128 * 1024)
71 * Size of the per-transport blacklist hash maps.
73 #define TRANSPORT_BLACKLIST_HT_SIZE 16
76 * How often should we try to reconnect to a peer using a particular
77 * transport plugin before giving up? Note that the plugin may be
78 * added back to the list after PLUGIN_RETRY_FREQUENCY expires.
80 #define MAX_CONNECT_RETRY 3
83 * Limit on the number of ready-to-run tasks when validating
84 * HELLOs. If more tasks are ready to run, we will drop
85 * HELLOs instead of validating them.
87 #define MAX_HELLO_LOAD 4
90 * How often must a peer violate bandwidth quotas before we start
91 * to simply drop its messages?
93 #define QUOTA_VIOLATION_DROP_THRESHOLD 10
96 * How long until a HELLO verification attempt should time out?
97 * Must be rather small, otherwise a partially successful HELLO
98 * validation (some addresses working) might not be available
99 * before a client's request for a connection fails for good.
100 * Besides, if a single request to an address takes a long time,
101 * then the peer is unlikely worthwhile anyway.
103 #define HELLO_VERIFICATION_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
106 * How long is a PONG signature valid? We'll recycle a signature until
107 * 1/4 of this time is remaining. PONGs should expire so that if our
108 * external addresses change an adversary cannot replay them indefinitely.
109 * OTOH, we don't want to spend too much time generating PONG signatures,
110 * so they must have some lifetime to reduce our CPU usage.
112 #define PONG_SIGNATURE_LIFETIME GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 1)
115 * Priority to use for PONG messages.
117 #define TRANSPORT_PONG_PRIORITY 4
120 * How often do we re-add (cheaper) plugins to our list of plugins
121 * to try for a given connected peer?
123 #define PLUGIN_RETRY_FREQUENCY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 15)
126 * After how long do we expire an address in a HELLO that we just
127 * validated? This value is also used for our own addresses when we
130 #define HELLO_ADDRESS_EXPIRATION GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 12)
134 * How long before an existing address expires should we again try to
135 * validate it? Must be (significantly) smaller than
136 * HELLO_ADDRESS_EXPIRATION.
138 #define HELLO_REVALIDATION_START_TIME GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 1)
141 * List of addresses of other peers
143 struct ForeignAddressList
146 * This is a linked list.
148 struct ForeignAddressList *next;
151 * Which ready list does this entry belong to.
153 struct ReadyList *ready_list;
156 * How long until we auto-expire this address (unless it is
157 * re-confirmed by the transport)?
159 struct GNUNET_TIME_Absolute expires;
162 * Task used to re-validate addresses, updates latencies and
165 GNUNET_SCHEDULER_TaskIdentifier revalidate_task;
173 * Session (or NULL if no valid session currently exists or if the
174 * plugin does not use sessions).
176 struct Session *session;
178 struct ATS_ressource_entry * ressources;
180 struct ATS_quality_entry * quality;
183 * What was the last latency observed for this address, plugin and peer?
185 struct GNUNET_TIME_Relative latency;
188 * If we did not successfully transmit a message to the given peer
189 * via this connection during the specified time, we should consider
190 * the connection to be dead. This is used in the case that a TCP
191 * transport simply stalls writing to the stream but does not
192 * formerly get a signal that the other peer died.
194 struct GNUNET_TIME_Absolute timeout;
197 * How often have we tried to connect using this plugin? Used to
198 * discriminate against addresses that do not work well.
199 * FIXME: not yet used, but should be!
201 unsigned int connect_attempts;
204 * DV distance to this peer (1 if no DV is used).
205 * FIXME: need to set this from transport plugins!
215 * Have we ever estimated the latency of this address? Used to
216 * ensure that the first time we add an address, we immediately
222 * Are we currently connected via this address? The first time we
223 * successfully transmit or receive data to a peer via a particular
224 * address, we set this to GNUNET_YES. If we later get an error
225 * (disconnect notification, transmission failure, timeout), we set
226 * it back to GNUNET_NO.
231 * Is this plugin currently busy transmitting to the specific target?
232 * GNUNET_NO if not (initial, default state is GNUNET_NO). Internal
233 * messages do not count as 'in transmit'.
238 * Has this address been validated yet?
246 * Entry in linked list of network addresses for ourselves. Also
247 * includes a cached signature for 'struct TransportPongMessage's.
249 struct OwnAddressList
252 * This is a linked list.
254 struct OwnAddressList *next;
257 * How long until the current signature expires? (ZERO if the
258 * signature was never created).
260 struct GNUNET_TIME_Absolute pong_sig_expires;
263 * Signature for a 'struct TransportPongMessage' for this address.
265 struct GNUNET_CRYPTO_RsaSignature pong_signature;
276 * Entry in linked list of all of our plugins.
278 struct TransportPlugin
281 * This is a linked list.
283 struct TransportPlugin *next;
286 * API of the transport as returned by the plugin's
287 * initialization function.
289 struct GNUNET_TRANSPORT_PluginFunctions *api;
292 * Short name for the plugin (i.e. "tcp").
297 * Name of the library (i.e. "gnunet_plugin_transport_tcp").
302 * List of our known addresses for this transport.
304 struct OwnAddressList *addresses;
307 * Environment this transport service is using
310 struct GNUNET_TRANSPORT_PluginEnvironment env;
313 * ID of task that is used to clean up expired addresses.
315 GNUNET_SCHEDULER_TaskIdentifier address_update_task;
318 * Set to GNUNET_YES if we need to scrap the existing list of
319 * "addresses" and start fresh when we receive the next address
320 * update from a transport. Set to GNUNET_NO if we should just add
321 * the new address to the list and wait for the commit call.
325 struct ATS_plugin * rc;
328 * Hashmap of blacklisted peers for this particular transport.
330 struct GNUNET_CONTAINER_MultiHashMap *blacklist;
333 struct NeighbourList;
336 * For each neighbour we keep a list of messages
337 * that we still want to transmit to the neighbour.
343 * This is a doubly linked list.
345 struct MessageQueue *next;
348 * This is a doubly linked list.
350 struct MessageQueue *prev;
353 * The message(s) we want to transmit, GNUNET_MessageHeader(s)
354 * stuck together in memory. Allocated at the end of this struct.
356 const char *message_buf;
359 * Size of the message buf
361 size_t message_buf_size;
364 * Client responsible for queueing the message;
365 * used to check that a client has no two messages
366 * pending for the same target. Can be NULL.
368 struct TransportClient *client;
371 * Using which specific address should we send this message?
373 struct ForeignAddressList *specific_address;
376 * Peer ID of the Neighbour this entry belongs to.
378 struct GNUNET_PeerIdentity neighbour_id;
381 * Plugin that we used for the transmission.
382 * NULL until we scheduled a transmission.
384 struct TransportPlugin *plugin;
387 * At what time should we fail?
389 struct GNUNET_TIME_Absolute timeout;
392 * Internal message of the transport system that should not be
393 * included in the usual SEND-SEND_OK transmission confirmation
394 * traffic management scheme. Typically, "internal_msg" will
395 * be set whenever "client" is NULL (but it is not strictly
401 * How important is the message?
403 unsigned int priority;
409 * For a given Neighbour, which plugins are available
410 * to talk to this peer and what are their costs?
415 * This is a linked list.
417 struct ReadyList *next;
420 * Which of our transport plugins does this entry
423 struct TransportPlugin *plugin;
426 * Transport addresses, latency, and readiness for
427 * this particular plugin.
429 struct ForeignAddressList *addresses;
432 * To which neighbour does this ready list belong to?
434 struct NeighbourList *neighbour;
439 * Entry in linked list of all of our current neighbours.
445 * This is a linked list.
447 struct NeighbourList *next;
450 * Which of our transports is connected to this peer
451 * and what is their status?
453 struct ReadyList *plugins;
456 * Head of list of messages we would like to send to this peer;
457 * must contain at most one message per client.
459 struct MessageQueue *messages_head;
462 * Tail of list of messages we would like to send to this peer; must
463 * contain at most one message per client.
465 struct MessageQueue *messages_tail;
468 * Head of list of messages of messages we expected the continuation
469 * to be called to destroy the message
471 struct MessageQueue *cont_head;
474 * Tail of list of messages of messages we expected the continuation
475 * to be called to destroy the message
477 struct MessageQueue *cont_tail;
480 * Buffer for at most one payload message used when we receive
481 * payload data before our PING-PONG has succeeded. We then
482 * store such messages in this intermediary buffer until the
483 * connection is fully up.
485 struct GNUNET_MessageHeader *pre_connect_message_buffer;
488 * Context for peerinfo iteration.
489 * NULL after we are done processing peerinfo's information.
491 struct GNUNET_PEERINFO_IteratorContext *piter;
494 * Public key for this peer. Valid only if the respective flag is set below.
496 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
499 * Identity of this neighbour.
501 struct GNUNET_PeerIdentity id;
504 * ID of task scheduled to run when this peer is about to
505 * time out (will free resources associated with the peer).
507 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
510 * ID of task scheduled to run when we should retry transmitting
511 * the head of the message queue. Actually triggered when the
512 * transmission is timing out (we trigger instantly when we have
513 * a chance of success).
515 GNUNET_SCHEDULER_TaskIdentifier retry_task;
518 * How long until we should consider this peer dead
519 * (if we don't receive another message in the
522 struct GNUNET_TIME_Absolute peer_timeout;
525 * Tracker for inbound bandwidth.
527 struct GNUNET_BANDWIDTH_Tracker in_tracker;
530 * The latency we have seen for this particular address for
531 * this particular peer. This latency may have been calculated
532 * over multiple transports. This value reflects how long it took
533 * us to receive a response when SENDING via this particular
534 * transport/neighbour/address combination!
536 * FIXME: we need to periodically send PINGs to update this
537 * latency (at least more often than the current "huge" (11h?)
540 struct GNUNET_TIME_Relative latency;
543 * How often has the other peer (recently) violated the
544 * inbound traffic limit? Incremented by 10 per violation,
545 * decremented by 1 per non-violation (for each
548 unsigned int quota_violation_count;
551 * DV distance to this peer (1 if no DV is used).
556 * Have we seen an PONG from this neighbour in the past (and
557 * not had a disconnect since)?
562 * Do we have a valid public key for this neighbour?
564 int public_key_valid;
567 * Performance data for the peer.
569 struct GNUNET_TRANSPORT_ATS_Information *ats;
573 * Message used to ask a peer to validate receipt (to check an address
574 * from a HELLO). Followed by the address we are trying to validate,
575 * or an empty address if we are just sending a PING to confirm that a
576 * connection which the receiver (of the PING) initiated is still valid.
578 struct TransportPingMessage
582 * Type will be GNUNET_MESSAGE_TYPE_TRANSPORT_PING
584 struct GNUNET_MessageHeader header;
587 * Challenge code (to ensure fresh reply).
589 uint32_t challenge GNUNET_PACKED;
592 * Who is the intended recipient?
594 struct GNUNET_PeerIdentity target;
600 * Message used to validate a HELLO. The challenge is included in the
601 * confirmation to make matching of replies to requests possible. The
602 * signature signs our public key, an expiration time and our address.<p>
604 * This message is followed by our transport address that the PING tried
605 * to confirm (if we liked it). The address can be empty (zero bytes)
606 * if the PING had not address either (and we received the request via
607 * a connection that we initiated).
609 struct TransportPongMessage
613 * Type will be GNUNET_MESSAGE_TYPE_TRANSPORT_PONG
615 struct GNUNET_MessageHeader header;
618 * Challenge code from PING (showing freshness). Not part of what
619 * is signed so that we can re-use signatures.
621 uint32_t challenge GNUNET_PACKED;
626 struct GNUNET_CRYPTO_RsaSignature signature;
629 * What are we signing and why? Two possible reason codes can be here:
630 * GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN to confirm that this is a
631 * plausible address for this peer (pid is set to identity of signer); or
632 * GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING to confirm that this is
633 * an address we used to connect to the peer with the given pid.
635 struct GNUNET_CRYPTO_RsaSignaturePurpose purpose;
638 * When does this signature expire?
640 struct GNUNET_TIME_AbsoluteNBO expiration;
643 * Either the identity of the peer Who signed this message, or the
644 * identity of the peer that we're connected to using the given
645 * address (depending on purpose.type).
647 struct GNUNET_PeerIdentity pid;
650 * Size of address appended to this message (part of what is
651 * being signed, hence not redundant).
659 * Linked list of messages to be transmitted to the client. Each
660 * entry is followed by the actual message.
662 struct ClientMessageQueueEntry
665 * This is a doubly-linked list.
667 struct ClientMessageQueueEntry *next;
670 * This is a doubly-linked list.
672 struct ClientMessageQueueEntry *prev;
677 * Client connected to the transport service.
679 struct TransportClient
683 * This is a linked list.
685 struct TransportClient *next;
688 * Handle to the client.
690 struct GNUNET_SERVER_Client *client;
693 * Linked list of messages yet to be transmitted to
696 struct ClientMessageQueueEntry *message_queue_head;
699 * Tail of linked list of messages yet to be transmitted to the
702 struct ClientMessageQueueEntry *message_queue_tail;
705 * Current transmit request handle.
707 struct GNUNET_CONNECTION_TransmitHandle *th;
710 * Is a call to "transmit_send_continuation" pending? If so, we
711 * must not free this struct (even if the corresponding client
712 * disconnects) and instead only remove it from the linked list and
713 * set the "client" field to NULL.
718 * Length of the list of messages pending for this client.
720 unsigned int message_count;
726 * Context of currently active requests to peerinfo
727 * for validation of HELLOs.
729 struct CheckHelloValidatedContext;
733 * Entry in map of all HELLOs awaiting validation.
735 struct ValidationEntry
739 * NULL if this entry is not part of a larger HELLO validation.
741 struct CheckHelloValidatedContext *chvc;
744 * The address, actually a pointer to the end
745 * of this struct. Do not free!
750 * Name of the transport.
752 char *transport_name;
755 * The public key of the peer.
757 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
760 * ID of task that will clean up this entry if we don't succeed
761 * with the validation first.
763 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
766 * At what time did we send this validation?
768 struct GNUNET_TIME_Absolute send_time;
771 * Session being validated (or NULL for none).
773 struct Session *session;
776 * Challenge number we used.
789 * Context of currently active requests to peerinfo
790 * for validation of HELLOs.
792 struct CheckHelloValidatedContext
796 * This is a doubly-linked list.
798 struct CheckHelloValidatedContext *next;
801 * This is a doubly-linked list.
803 struct CheckHelloValidatedContext *prev;
806 * Hello that we are validating.
808 const struct GNUNET_HELLO_Message *hello;
811 * Context for peerinfo iteration.
812 * NULL after we are done processing peerinfo's information.
814 struct GNUNET_PEERINFO_IteratorContext *piter;
817 * Was a HELLO known for this peer to peerinfo?
822 * Number of validation entries currently referring to this
825 unsigned int ve_count;
832 static struct GNUNET_HELLO_Message *our_hello;
837 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
842 static struct GNUNET_PeerIdentity my_identity;
847 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
852 const struct GNUNET_CONFIGURATION_Handle *cfg;
855 * Linked list of all clients to this service.
857 static struct TransportClient *clients;
860 * All loaded plugins.
862 static struct TransportPlugin *plugins;
865 * Handle to peerinfo service.
867 static struct GNUNET_PEERINFO_Handle *peerinfo;
870 * All known neighbours and their HELLOs.
872 static struct NeighbourList *neighbours;
875 * Number of neighbours we'd like to have.
877 static uint32_t max_connect_per_transport;
880 * Head of linked list.
882 static struct CheckHelloValidatedContext *chvc_head;
885 * Tail of linked list.
887 static struct CheckHelloValidatedContext *chvc_tail;
890 * Map of PeerIdentities to 'struct ValidationEntry*'s (addresses
891 * of the given peer that we are currently validating).
893 static struct GNUNET_CONTAINER_MultiHashMap *validation_map;
896 * Handle for reporting statistics.
898 static struct GNUNET_STATISTICS_Handle *stats;
901 * Identifier of 'refresh_hello' task.
903 static GNUNET_SCHEDULER_TaskIdentifier hello_task;
906 * Identifier of ats scheduler task.
908 static GNUNET_SCHEDULER_TaskIdentifier ats_task;
911 * Is transport service shutting down ?
913 static int shutdown_in_progress;
916 * Handle for ats information
918 static struct ATS_Handle *ats;
921 * Time of last ats execution
923 struct GNUNET_TIME_Absolute last_ats_execution;
925 * Minimum interval between two ATS executions
927 struct GNUNET_TIME_Relative ats_minimum_interval;
929 * Regular interval when ATS execution is triggered
931 struct GNUNET_TIME_Relative ats_regular_interval;
934 * The peer specified by the given neighbour has timed-out or a plugin
935 * has disconnected. We may either need to do nothing (other plugins
936 * still up), or trigger a full disconnect and clean up. This
937 * function updates our state and do the necessary notifications.
938 * Also notifies our clients that the neighbour is now officially
941 * @param n the neighbour list entry for the peer
942 * @param check should we just check if all plugins
943 * disconnected or must we ask all plugins to
946 static void disconnect_neighbour (struct NeighbourList *n, int check);
949 * Check the ready list for the given neighbour and if a plugin is
950 * ready for transmission (and if we have a message), do so!
952 * @param nexi target peer for which to transmit
954 static void try_transmission_to_peer (struct NeighbourList *n);
956 struct ForeignAddressList * get_preferred_ats_address (
957 struct NeighbourList *n);
960 * Find an entry in the neighbour list for a particular peer.
962 * @return NULL if not found.
964 static struct NeighbourList *
965 find_neighbour (const struct GNUNET_PeerIdentity *key)
967 struct NeighbourList *head = neighbours;
969 while ((head != NULL) &&
970 (0 != memcmp (key, &head->id, sizeof (struct GNUNET_PeerIdentity))))
975 static int update_addr_value (struct ForeignAddressList *fal, uint32_t value , int ats_index)
979 for (c=0; c<available_quality_metrics; c++)
981 if (ats_index == qm[c].atis_index)
983 fal->quality[c].values[0] = fal->quality[c].values[1];
984 fal->quality[c].values[1] = fal->quality[c].values[2];
985 fal->quality[c].values[2] = value;
987 ats_modify_problem_state (ats, ATS_QUALITY_UPDATED);
990 if (set == GNUNET_NO)
992 for (c=0; c<available_ressources; c++)
994 if (ats_index == ressources[c].atis_index)
996 fal->ressources[c].c = value;
998 ats_modify_problem_state (ats, ATS_COST_UPDATED);
1006 update_addr_ats (struct ForeignAddressList *fal,
1007 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
1012 for (c1=0; c1<ats_count; c1++)
1014 set = update_addr_value(fal, ntohl(ats_data[c1].value), ntohl(ats_data[c1].type));
1020 * Find an entry in the transport list for a particular transport.
1022 * @return NULL if not found.
1024 static struct TransportPlugin *
1025 find_transport (const char *short_name)
1027 struct TransportPlugin *head = plugins;
1028 while ((head != NULL) && (0 != strcmp (short_name, head->short_name)))
1034 * Is a particular peer blacklisted for a particular transport?
1036 * @param peer the peer to check for
1037 * @param plugin the plugin used to connect to the peer
1039 * @return GNUNET_YES if the peer is blacklisted, GNUNET_NO if not
1042 is_blacklisted (const struct GNUNET_PeerIdentity *peer, struct TransportPlugin *plugin)
1045 if (plugin->blacklist != NULL)
1047 if (GNUNET_CONTAINER_multihashmap_contains (plugin->blacklist, &peer->hashPubKey) == GNUNET_YES)
1050 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1051 "Peer `%s:%s' is blacklisted!\n",
1052 plugin->short_name, GNUNET_i2s (peer));
1055 GNUNET_STATISTICS_update (stats, "# blacklisted peers refused", 1, GNUNET_NO);
1065 add_peer_to_blacklist (struct GNUNET_PeerIdentity *peer,
1066 char *transport_name)
1068 struct TransportPlugin *plugin;
1070 plugin = find_transport(transport_name);
1071 if (plugin == NULL) /* Nothing to do */
1074 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1075 "Adding peer `%s' with plugin `%s' to blacklist\n",
1079 if (plugin->blacklist == NULL)
1080 plugin->blacklist = GNUNET_CONTAINER_multihashmap_create(TRANSPORT_BLACKLIST_HT_SIZE);
1081 GNUNET_assert(plugin->blacklist != NULL);
1082 GNUNET_CONTAINER_multihashmap_put(plugin->blacklist, &peer->hashPubKey,
1084 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
1089 * Read the blacklist file, containing transport:peer entries.
1090 * Provided the transport is loaded, set up hashmap with these
1091 * entries to blacklist peers by transport.
1095 read_blacklist_file (const struct GNUNET_CONFIGURATION_Handle *cfg)
1102 struct GNUNET_PeerIdentity pid;
1104 struct GNUNET_CRYPTO_HashAsciiEncoded enc;
1105 unsigned int entries_found;
1106 char *transport_name;
1109 GNUNET_CONFIGURATION_get_value_filename (cfg,
1115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1116 "Option `%s' in section `%s' not specified!\n",
1122 if (GNUNET_OK != GNUNET_DISK_file_test (fn))
1123 GNUNET_DISK_fn_write (fn, NULL, 0, GNUNET_DISK_PERM_USER_READ
1124 | GNUNET_DISK_PERM_USER_WRITE);
1125 if (0 != STAT (fn, &frstat))
1127 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1128 _("Could not read blacklist file `%s'\n"), fn);
1132 if (frstat.st_size == 0)
1135 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1136 _("Blacklist file `%s' is empty.\n"),
1142 /* FIXME: use mmap */
1143 data = GNUNET_malloc_large (frstat.st_size);
1144 GNUNET_assert(data != NULL);
1145 if (frstat.st_size !=
1146 GNUNET_DISK_fn_read (fn, data, frstat.st_size))
1148 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1149 _("Failed to read blacklist from `%s'\n"), fn);
1156 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1158 while ((frstat.st_size >= sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded)) &&
1159 (pos <= frstat.st_size - sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded)))
1162 while ((colon_pos < frstat.st_size) && (data[colon_pos] != ':') && !isspace ( (unsigned char) data[colon_pos]))
1165 if (colon_pos >= frstat.st_size)
1167 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1168 _("Syntax error in blacklist file at offset %llu, giving up!\n"),
1169 (unsigned long long) colon_pos);
1175 if (isspace( (unsigned char) data[colon_pos]))
1177 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1178 _("Syntax error in blacklist file at offset %llu, skipping bytes.\n"),
1179 (unsigned long long) colon_pos);
1181 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1185 tsize = colon_pos - pos;
1186 if ((pos >= frstat.st_size) || (pos + tsize >= frstat.st_size) || (tsize == 0))
1188 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1189 _("Syntax error in blacklist file at offset %llu, giving up!\n"),
1190 (unsigned long long) colon_pos);
1199 transport_name = GNUNET_malloc(tsize + 1);
1200 memcpy(transport_name, &data[pos], tsize);
1201 pos = colon_pos + 1;
1203 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1204 "Read transport name %s in blacklist file.\n",
1207 memcpy (&enc, &data[pos], sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded));
1208 if (!isspace ( (unsigned char) enc.encoding[sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded) - 1]))
1210 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1211 _("Syntax error in blacklist file at offset %llu, skipping bytes.\n"),
1212 (unsigned long long) pos);
1214 while ((pos < frstat.st_size) && (!isspace ( (unsigned char) data[pos])))
1216 GNUNET_free_non_null(transport_name);
1219 enc.encoding[sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded) - 1] = '\0';
1220 if (GNUNET_OK != GNUNET_CRYPTO_hash_from_string ((char *) &enc, &pid.hashPubKey))
1222 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1223 _("Syntax error in blacklist file at offset %llu, skipping bytes `%s'.\n"),
1224 (unsigned long long) pos,
1229 if (0 != memcmp (&pid,
1231 sizeof (struct GNUNET_PeerIdentity)))
1234 add_peer_to_blacklist (&pid,
1239 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1240 _("Found myself `%s' in blacklist (useless, ignored)\n"),
1244 pos = pos + sizeof (struct GNUNET_CRYPTO_HashAsciiEncoded);
1245 GNUNET_free_non_null(transport_name);
1246 while ((pos < frstat.st_size) && isspace ( (unsigned char) data[pos]))
1249 GNUNET_STATISTICS_update (stats, "# Transport entries blacklisted", entries_found, GNUNET_NO);
1256 * Function called to notify a client about the socket being ready to
1257 * queue more data. "buf" will be NULL and "size" zero if the socket
1258 * was closed for writing in the meantime.
1260 * @param cls closure
1261 * @param size number of bytes available in buf
1262 * @param buf where the callee should write the message
1263 * @return number of bytes written to buf
1266 transmit_to_client_callback (void *cls, size_t size, void *buf)
1268 struct TransportClient *client = cls;
1269 struct ClientMessageQueueEntry *q;
1272 const struct GNUNET_MessageHeader *msg;
1279 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1280 "Transmission to client failed, closing connection.\n");
1282 /* fatal error with client, free message queue! */
1283 while (NULL != (q = client->message_queue_head))
1285 GNUNET_STATISTICS_update (stats,
1286 gettext_noop ("# bytes discarded (could not transmit to client)"),
1287 ntohs (((const struct GNUNET_MessageHeader*)&q[1])->size),
1289 GNUNET_CONTAINER_DLL_remove (client->message_queue_head,
1290 client->message_queue_tail,
1294 client->message_count = 0;
1299 while (NULL != (q = client->message_queue_head))
1301 msg = (const struct GNUNET_MessageHeader *) &q[1];
1302 msize = ntohs (msg->size);
1303 if (msize + tsize > size)
1306 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1307 "Transmitting message of type %u to client.\n",
1310 GNUNET_CONTAINER_DLL_remove (client->message_queue_head,
1311 client->message_queue_tail,
1313 memcpy (&cbuf[tsize], msg, msize);
1316 client->message_count--;
1320 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
1321 client->th = GNUNET_SERVER_notify_transmit_ready (client->client,
1323 GNUNET_TIME_UNIT_FOREVER_REL,
1324 &transmit_to_client_callback,
1326 GNUNET_assert (client->th != NULL);
1333 * Convert an address to a string.
1335 * @param plugin name of the plugin responsible for the address
1336 * @param addr binary address
1337 * @param addr_len number of bytes in addr
1338 * @return NULL on error, otherwise address string
1341 a2s (const char *plugin,
1345 struct TransportPlugin *p;
1349 p = find_transport (plugin);
1350 if ((p == NULL) || (addr_len == 0) || (addr == NULL))
1353 return p->api->address_to_string (NULL,
1363 * Iterator to free entries in the validation_map.
1365 * @param cls closure (unused)
1366 * @param key current key code
1367 * @param value value in the hash map (validation to abort)
1368 * @return GNUNET_YES (always)
1371 abort_validation (void *cls,
1372 const GNUNET_HashCode * key,
1375 struct ValidationEntry *va = value;
1377 if (GNUNET_SCHEDULER_NO_TASK != va->timeout_task)
1378 GNUNET_SCHEDULER_cancel (va->timeout_task);
1379 GNUNET_free (va->transport_name);
1380 if (va->chvc != NULL)
1382 va->chvc->ve_count--;
1383 if (va->chvc->ve_count == 0)
1385 GNUNET_CONTAINER_DLL_remove (chvc_head,
1388 GNUNET_free (va->chvc);
1398 * HELLO validation cleanup task (validation failed).
1400 * @param cls the 'struct ValidationEntry' that failed
1401 * @param tc scheduler context (unused)
1404 timeout_hello_validation (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1406 struct ValidationEntry *va = cls;
1407 struct GNUNET_PeerIdentity pid;
1409 va->timeout_task = GNUNET_SCHEDULER_NO_TASK;
1410 GNUNET_STATISTICS_update (stats,
1411 gettext_noop ("# address validation timeouts"),
1414 GNUNET_CRYPTO_hash (&va->publicKey,
1416 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
1418 GNUNET_break (GNUNET_OK ==
1419 GNUNET_CONTAINER_multihashmap_remove (validation_map,
1422 abort_validation (NULL, NULL, va);
1428 * Send the specified message to the specified client. Since multiple
1429 * messages may be pending for the same client at a time, this code
1430 * makes sure that no message is lost.
1432 * @param client client to transmit the message to
1433 * @param msg the message to send
1434 * @param may_drop can this message be dropped if the
1435 * message queue for this client is getting far too large?
1438 transmit_to_client (struct TransportClient *client,
1439 const struct GNUNET_MessageHeader *msg, int may_drop)
1441 struct ClientMessageQueueEntry *q;
1444 if ((client->message_count >= MAX_PENDING) && (GNUNET_YES == may_drop))
1446 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1448 ("Dropping message of type %u and size %u, have %u messages pending (%u is the soft limit)\n"),
1451 client->message_count,
1453 GNUNET_STATISTICS_update (stats,
1454 gettext_noop ("# messages dropped due to slow client"),
1459 msize = ntohs (msg->size);
1460 GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
1461 q = GNUNET_malloc (sizeof (struct ClientMessageQueueEntry) + msize);
1462 memcpy (&q[1], msg, msize);
1463 GNUNET_CONTAINER_DLL_insert_after (client->message_queue_head,
1464 client->message_queue_tail,
1465 client->message_queue_tail,
1467 client->message_count++;
1468 if (client->th == NULL)
1470 client->th = GNUNET_SERVER_notify_transmit_ready (client->client,
1472 GNUNET_TIME_UNIT_FOREVER_REL,
1473 &transmit_to_client_callback,
1475 GNUNET_assert (client->th != NULL);
1481 * Transmit a 'SEND_OK' notification to the given client for the
1484 * @param client who to notify
1485 * @param n neighbour to notify about, can be NULL (on failure)
1486 * @param target target of the transmission
1487 * @param result status code for the transmission request
1490 transmit_send_ok (struct TransportClient *client,
1491 struct NeighbourList *n,
1492 const struct GNUNET_PeerIdentity *target,
1495 struct SendOkMessage send_ok_msg;
1497 send_ok_msg.header.size = htons (sizeof (send_ok_msg));
1498 send_ok_msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_OK);
1499 send_ok_msg.success = htonl (result);
1501 send_ok_msg.latency = GNUNET_TIME_relative_hton (n->latency);
1503 send_ok_msg.latency = GNUNET_TIME_relative_hton (GNUNET_TIME_UNIT_FOREVER_REL);
1504 send_ok_msg.peer = *target;
1505 transmit_to_client (client, &send_ok_msg.header, GNUNET_NO);
1510 * Mark the given FAL entry as 'connected' (and hence preferred for
1511 * sending); also mark all others for the same peer as 'not connected'
1512 * (since only one can be preferred).
1514 * @param fal address to set to 'connected'
1517 mark_address_connected (struct ForeignAddressList *fal);
1522 * We should re-try transmitting to the given peer,
1523 * hopefully we've learned something in the meantime.
1526 retry_transmission_task (void *cls,
1527 const struct GNUNET_SCHEDULER_TaskContext *tc)
1529 struct NeighbourList *n = cls;
1531 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
1532 try_transmission_to_peer (n);
1537 * Function called by the GNUNET_TRANSPORT_TransmitFunction
1538 * upon "completion" of a send request. This tells the API
1539 * that it is now legal to send another message to the given
1542 * @param cls closure, identifies the entry on the
1543 * message queue that was transmitted and the
1544 * client responsible for queuing the message
1545 * @param target the peer receiving the message
1546 * @param result GNUNET_OK on success, if the transmission
1547 * failed, we should not tell the client to transmit
1551 transmit_send_continuation (void *cls,
1552 const struct GNUNET_PeerIdentity *target,
1555 struct MessageQueue *mq = cls;
1556 struct NeighbourList *n;
1558 GNUNET_STATISTICS_update (stats,
1559 gettext_noop ("# bytes pending with plugins"),
1560 - (int64_t) mq->message_buf_size,
1562 if (result == GNUNET_OK)
1564 GNUNET_STATISTICS_update (stats,
1565 gettext_noop ("# bytes successfully transmitted by plugins"),
1566 mq->message_buf_size,
1571 GNUNET_STATISTICS_update (stats,
1572 gettext_noop ("# bytes with transmission failure by plugins"),
1573 mq->message_buf_size,
1576 if (mq->specific_address != NULL)
1578 if (result == GNUNET_OK)
1580 mq->specific_address->timeout =
1581 GNUNET_TIME_relative_to_absolute
1582 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
1583 if (mq->specific_address->validated == GNUNET_YES)
1584 mark_address_connected (mq->specific_address);
1588 if (mq->specific_address->connected != GNUNET_NO)
1591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1592 "Marking address `%s' as no longer connected (due to transmission problem)\n",
1593 a2s (mq->specific_address->ready_list->plugin->short_name,
1594 mq->specific_address->addr,
1595 mq->specific_address->addrlen));
1597 GNUNET_STATISTICS_update (stats,
1598 gettext_noop ("# connected addresses"),
1601 mq->specific_address->connected = GNUNET_NO;
1604 if (! mq->internal_msg)
1605 mq->specific_address->in_transmit = GNUNET_NO;
1607 n = find_neighbour (&mq->neighbour_id);
1608 if (mq->client != NULL)
1609 transmit_send_ok (mq->client, n, target, result);
1612 GNUNET_CONTAINER_DLL_remove (n->cont_head,
1619 if (result == GNUNET_OK)
1620 try_transmission_to_peer (n);
1621 else if (GNUNET_SCHEDULER_NO_TASK == n->retry_task)
1622 n->retry_task = GNUNET_SCHEDULER_add_now (&retry_transmission_task,
1629 * Check the ready list for the given neighbour and if a plugin is
1630 * ready for transmission (and if we have a message), do so!
1632 * @param neighbour target peer for which to transmit
1635 try_transmission_to_peer (struct NeighbourList *n)
1637 struct ReadyList *rl;
1638 struct MessageQueue *mq;
1639 struct GNUNET_TIME_Relative timeout;
1643 if (n->messages_head == NULL)
1646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1647 "Transmission queue for `%4s' is empty\n",
1648 GNUNET_i2s (&n->id));
1650 return; /* nothing to do */
1653 mq = n->messages_head;
1654 force_address = GNUNET_YES;
1655 if (mq->specific_address == NULL)
1658 mq->specific_address = get_preferred_ats_address(n);
1659 GNUNET_STATISTICS_update (stats,
1660 gettext_noop ("# transport selected peer address freely"),
1663 force_address = GNUNET_NO;
1665 if (mq->specific_address == NULL)
1667 GNUNET_STATISTICS_update (stats,
1668 gettext_noop ("# transport failed to selected peer address"),
1671 timeout = GNUNET_TIME_absolute_get_remaining (mq->timeout);
1672 if (timeout.rel_value == 0)
1675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1676 "No destination address available to transmit message of size %u to peer `%4s'\n",
1677 mq->message_buf_size,
1678 GNUNET_i2s (&mq->neighbour_id));
1680 GNUNET_STATISTICS_update (stats,
1681 gettext_noop ("# bytes in message queue for other peers"),
1682 - (int64_t) mq->message_buf_size,
1684 GNUNET_STATISTICS_update (stats,
1685 gettext_noop ("# bytes discarded (no destination address available)"),
1686 mq->message_buf_size,
1688 if (mq->client != NULL)
1689 transmit_send_ok (mq->client, n, &n->id, GNUNET_NO);
1690 GNUNET_CONTAINER_DLL_remove (n->messages_head,
1694 return; /* nobody ready */
1696 GNUNET_STATISTICS_update (stats,
1697 gettext_noop ("# message delivery deferred (no address)"),
1700 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
1701 GNUNET_SCHEDULER_cancel (n->retry_task);
1702 n->retry_task = GNUNET_SCHEDULER_add_delayed (timeout,
1703 &retry_transmission_task,
1706 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1707 "No validated destination address available to transmit message of size %u to peer `%4s', will wait %llums to find an address.\n",
1708 mq->message_buf_size,
1709 GNUNET_i2s (&mq->neighbour_id),
1712 /* FIXME: might want to trigger peerinfo lookup here
1713 (unless that's already pending...) */
1716 GNUNET_CONTAINER_DLL_remove (n->messages_head,
1719 if (mq->specific_address->connected == GNUNET_NO)
1720 mq->specific_address->connect_attempts++;
1721 rl = mq->specific_address->ready_list;
1722 mq->plugin = rl->plugin;
1723 if (!mq->internal_msg)
1724 mq->specific_address->in_transmit = GNUNET_YES;
1726 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1727 "Sending message of size %u for `%4s' to `%s' via plugin `%s'\n",
1728 mq->message_buf_size,
1729 GNUNET_i2s (&n->id),
1730 (mq->specific_address->addr != NULL)
1731 ? a2s (mq->plugin->short_name,
1732 mq->specific_address->addr,
1733 mq->specific_address->addrlen)
1735 rl->plugin->short_name);
1737 GNUNET_STATISTICS_update (stats,
1738 gettext_noop ("# bytes in message queue for other peers"),
1739 - (int64_t) mq->message_buf_size,
1741 GNUNET_STATISTICS_update (stats,
1742 gettext_noop ("# bytes pending with plugins"),
1743 mq->message_buf_size,
1746 GNUNET_CONTAINER_DLL_insert (n->cont_head,
1750 ret = rl->plugin->api->send (rl->plugin->api->cls,
1753 mq->message_buf_size,
1755 GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
1756 mq->specific_address->session,
1757 mq->specific_address->addr,
1758 mq->specific_address->addrlen,
1760 &transmit_send_continuation, mq);
1763 /* failure, but 'send' would not call continuation in this case,
1764 so we need to do it here! */
1765 transmit_send_continuation (mq,
1773 * Send the specified message to the specified peer.
1775 * @param client source of the transmission request (can be NULL)
1776 * @param peer_address ForeignAddressList where we should send this message
1777 * @param priority how important is the message
1778 * @param timeout how long do we have to transmit?
1779 * @param message_buf message(s) to send GNUNET_MessageHeader(s)
1780 * @param message_buf_size total size of all messages in message_buf
1781 * @param is_internal is this an internal message; these are pre-pended and
1782 * also do not count for plugins being "ready" to transmit
1783 * @param neighbour handle to the neighbour for transmission
1786 transmit_to_peer (struct TransportClient *client,
1787 struct ForeignAddressList *peer_address,
1788 unsigned int priority,
1789 struct GNUNET_TIME_Relative timeout,
1790 const char *message_buf,
1791 size_t message_buf_size,
1792 int is_internal, struct NeighbourList *neighbour)
1794 struct MessageQueue *mq;
1799 /* check for duplicate submission */
1800 mq = neighbour->messages_head;
1803 if (mq->client == client)
1805 /* client transmitted to same peer twice
1806 before getting SEND_OK! */
1814 GNUNET_STATISTICS_update (stats,
1815 gettext_noop ("# bytes in message queue for other peers"),
1818 mq = GNUNET_malloc (sizeof (struct MessageQueue) + message_buf_size);
1819 mq->specific_address = peer_address;
1820 mq->client = client;
1821 /* FIXME: this memcpy can be up to 7% of our total runtime! */
1822 memcpy (&mq[1], message_buf, message_buf_size);
1823 mq->message_buf = (const char*) &mq[1];
1824 mq->message_buf_size = message_buf_size;
1825 memcpy(&mq->neighbour_id, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
1826 mq->internal_msg = is_internal;
1827 mq->priority = priority;
1828 mq->timeout = GNUNET_TIME_relative_to_absolute (timeout);
1830 GNUNET_CONTAINER_DLL_insert (neighbour->messages_head,
1831 neighbour->messages_tail,
1834 GNUNET_CONTAINER_DLL_insert_after (neighbour->messages_head,
1835 neighbour->messages_tail,
1836 neighbour->messages_tail,
1838 try_transmission_to_peer (neighbour);
1843 * Send a plain PING (without address or our HELLO) to the given
1844 * foreign address to try to establish a connection (and validate
1845 * that the other peer is really who he claimed he is).
1847 * @param n neighbour to PING
1850 transmit_plain_ping (struct NeighbourList *n)
1852 struct ValidationEntry *ve;
1853 struct TransportPingMessage ping;
1854 struct ReadyList *rl;
1855 struct TransportPlugin *plugin;
1856 struct ForeignAddressList *fal;
1858 if (! n->public_key_valid)
1860 /* This should not happen since the other peer
1861 should send us a HELLO prior to sending his
1863 GNUNET_break_op (0);
1864 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1865 "Could not transmit plain PING to `%s': public key not known\n",
1866 GNUNET_i2s (&n->id));
1869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1870 "Looking for addresses to transmit plain PING to `%s'\n",
1871 GNUNET_i2s (&n->id));
1872 for (rl = n->plugins; rl != NULL; rl = rl->next)
1874 plugin = rl->plugin;
1875 for (fal = rl->addresses; fal != NULL; fal = fal->next)
1877 if (! fal->connected)
1879 ve = GNUNET_malloc (sizeof (struct ValidationEntry));
1880 ve->transport_name = GNUNET_strdup (plugin->short_name);
1881 ve->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
1883 ve->send_time = GNUNET_TIME_absolute_get();
1884 ve->session = fal->session;
1885 memcpy(&ve->publicKey,
1887 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
1888 ve->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
1889 &timeout_hello_validation,
1891 GNUNET_CONTAINER_multihashmap_put (validation_map,
1894 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
1895 ping.header.size = htons(sizeof(struct TransportPingMessage));
1896 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
1897 ping.challenge = htonl(ve->challenge);
1898 memcpy(&ping.target, &n->id, sizeof(struct GNUNET_PeerIdentity));
1899 GNUNET_STATISTICS_update (stats,
1900 gettext_noop ("# PING without HELLO messages sent"),
1903 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1904 "Transmitting plain PING to `%s'\n",
1905 GNUNET_i2s (&n->id));
1906 transmit_to_peer (NULL,
1908 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
1909 HELLO_VERIFICATION_TIMEOUT,
1910 (const char*) &ping, sizeof (ping),
1918 * Mark the given FAL entry as 'connected' (and hence preferred for
1919 * sending); also mark all others for the same peer as 'not connected'
1920 * (since only one can be preferred).
1922 * @param fal address to set to 'connected'
1925 mark_address_connected (struct ForeignAddressList *fal)
1927 struct ForeignAddressList *pos;
1930 GNUNET_assert (GNUNET_YES == fal->validated);
1931 if (fal->connected == GNUNET_YES)
1932 return; /* nothing to do */
1934 pos = fal->ready_list->addresses;
1937 if (GNUNET_YES == pos->connected)
1940 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1941 "Marking address `%s' as no longer connected (due to connect on other address)\n",
1942 a2s (pos->ready_list->plugin->short_name,
1946 GNUNET_break (cnt == GNUNET_YES);
1948 pos->connected = GNUNET_NO;
1949 GNUNET_STATISTICS_update (stats,
1950 gettext_noop ("# connected addresses"),
1956 fal->connected = GNUNET_YES;
1957 if (GNUNET_YES == cnt)
1959 GNUNET_STATISTICS_update (stats,
1960 gettext_noop ("# connected addresses"),
1968 * Find an address in any of the available transports for
1969 * the given neighbour that would be good for message
1970 * transmission. This is essentially the transport selection
1973 * @param neighbour for whom to select an address
1974 * @return selected address, NULL if we have none
1976 struct ForeignAddressList *
1977 find_ready_address(struct NeighbourList *neighbour)
1979 struct ReadyList *head = neighbour->plugins;
1980 struct ForeignAddressList *addresses;
1981 struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
1982 struct ForeignAddressList *best_address;
1984 /* Hack to prefer unix domain sockets */
1985 struct ForeignAddressList *unix_address = NULL;
1987 best_address = NULL;
1988 while (head != NULL)
1990 addresses = head->addresses;
1991 while (addresses != NULL)
1993 if ( (addresses->timeout.abs_value < now.abs_value) &&
1994 (addresses->connected == GNUNET_YES) )
1997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1998 "Marking long-time inactive connection to `%4s' as down.\n",
1999 GNUNET_i2s (&neighbour->id));
2001 GNUNET_STATISTICS_update (stats,
2002 gettext_noop ("# connected addresses"),
2005 addresses->connected = GNUNET_NO;
2007 addresses = addresses->next;
2010 addresses = head->addresses;
2011 while (addresses != NULL)
2014 if (addresses->addr != NULL)
2015 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2016 "Have address `%s' for peer `%4s' (status: %d, %d, %d, %u, %llums, %u)\n",
2017 a2s (head->plugin->short_name,
2019 addresses->addrlen),
2020 GNUNET_i2s (&neighbour->id),
2021 addresses->connected,
2022 addresses->in_transmit,
2023 addresses->validated,
2024 addresses->connect_attempts,
2025 (unsigned long long) addresses->timeout.abs_value,
2026 (unsigned int) addresses->distance);
2028 if (0==strcmp(head->plugin->short_name,"unix"))
2030 if ( (unix_address == NULL) ||
2031 ( (unix_address != NULL) &&
2032 (addresses->latency.rel_value < unix_address->latency.rel_value) ) )
2033 unix_address = addresses;
2035 if ( ( (best_address == NULL) ||
2036 (addresses->connected == GNUNET_YES) ||
2037 (best_address->connected == GNUNET_NO) ) &&
2038 (addresses->in_transmit == GNUNET_NO) &&
2039 ( (best_address == NULL) ||
2040 (addresses->latency.rel_value < best_address->latency.rel_value)) )
2041 best_address = addresses;
2042 /* FIXME: also give lower-latency addresses that are not
2043 connected a chance some times... */
2044 addresses = addresses->next;
2046 if (unix_address != NULL)
2050 if (unix_address != NULL)
2052 best_address = unix_address;
2054 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2055 "Found UNIX address, forced this address\n");
2058 if (best_address != NULL)
2061 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2062 "Best address found (`%s') has latency of %llu ms.\n",
2063 (best_address->addrlen > 0)
2064 ? a2s (best_address->ready_list->plugin->short_name,
2066 best_address->addrlen)
2068 best_address->latency.rel_value);
2073 GNUNET_STATISTICS_update (stats,
2074 gettext_noop ("# transmission attempts failed (no address)"),
2079 return best_address;
2087 struct GeneratorContext
2089 struct TransportPlugin *plug_pos;
2090 struct OwnAddressList *addr_pos;
2091 struct GNUNET_TIME_Absolute expiration;
2099 address_generator (void *cls, size_t max, void *buf)
2101 struct GeneratorContext *gc = cls;
2104 while ((gc->addr_pos == NULL) && (gc->plug_pos != NULL))
2106 gc->plug_pos = gc->plug_pos->next;
2107 gc->addr_pos = (gc->plug_pos != NULL) ? gc->plug_pos->addresses : NULL;
2109 if (NULL == gc->plug_pos)
2114 ret = GNUNET_HELLO_add_address (gc->plug_pos->short_name,
2117 gc->addr_pos->addrlen, buf, max);
2118 gc->addr_pos = gc->addr_pos->next;
2124 * Construct our HELLO message from all of the addresses of
2125 * all of the transports.
2128 * @param tc scheduler context
2131 refresh_hello_task (void *cls,
2132 const struct GNUNET_SCHEDULER_TaskContext *tc)
2134 struct GNUNET_HELLO_Message *hello;
2135 struct TransportClient *cpos;
2136 struct NeighbourList *npos;
2137 struct GeneratorContext gc;
2139 hello_task = GNUNET_SCHEDULER_NO_TASK;
2140 gc.plug_pos = plugins;
2141 gc.addr_pos = plugins != NULL ? plugins->addresses : NULL;
2142 gc.expiration = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
2143 hello = GNUNET_HELLO_create (&my_public_key, &address_generator, &gc);
2145 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2146 "Refreshed my `%s', new size is %d\n", "HELLO", GNUNET_HELLO_size(hello));
2148 GNUNET_STATISTICS_update (stats,
2149 gettext_noop ("# refreshed my HELLO"),
2153 while (cpos != NULL)
2155 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2156 "Transmitting my HELLO to client!\n");
2157 transmit_to_client (cpos,
2158 (const struct GNUNET_MessageHeader *) hello,
2163 GNUNET_free_non_null (our_hello);
2165 GNUNET_PEERINFO_add_peer (peerinfo, our_hello);
2166 for (npos = neighbours; npos != NULL; npos = npos->next)
2168 if (! npos->received_pong)
2171 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2172 "Transmitting updated `%s' to neighbour `%4s'\n",
2173 "HELLO", GNUNET_i2s (&npos->id));
2175 GNUNET_STATISTICS_update (stats,
2176 gettext_noop ("# transmitted my HELLO to other peers"),
2179 transmit_to_peer (NULL, NULL, 0,
2180 HELLO_ADDRESS_EXPIRATION,
2181 (const char *) our_hello,
2182 GNUNET_HELLO_size(our_hello),
2189 * Schedule task to refresh hello (unless such a
2190 * task exists already).
2195 #if DEBUG_TRANSPORT_HELLO
2196 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2197 "refresh_hello() called!\n");
2199 if (hello_task != GNUNET_SCHEDULER_NO_TASK)
2202 = GNUNET_SCHEDULER_add_now (&refresh_hello_task,
2208 * Iterator over hash map entries that NULLs the session of validation
2209 * entries that match the given session.
2211 * @param cls closure (the 'struct Session*' to match against)
2212 * @param key current key code (peer ID, not used)
2213 * @param value value in the hash map ('struct ValidationEntry*')
2214 * @return GNUNET_YES (we should continue to iterate)
2217 remove_session_validations (void *cls,
2218 const GNUNET_HashCode * key,
2221 struct Session *session = cls;
2222 struct ValidationEntry *ve = value;
2224 if (session == ve->session)
2231 * We've been disconnected from the other peer (for some
2232 * connection-oriented transport). Either quickly
2233 * re-establish the connection or signal the disconnect
2236 * Only signal CORE level disconnect if ALL addresses
2237 * for the peer are exhausted.
2239 * @param p overall plugin context
2240 * @param nl neighbour that was disconnected
2243 try_fast_reconnect (struct TransportPlugin *p,
2244 struct NeighbourList *nl)
2246 /* FIXME-MW: fast reconnect / transport switching not implemented... */
2247 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2248 "try_fast_reconnect not implemented!\n");
2249 /* Note: the idea here is to hide problems with transports (or
2250 switching between plugins) from the core to eliminate the need to
2251 re-negotiate session keys and the like; OTOH, we should tell core
2252 quickly (much faster than timeout) `if a connection was lost and
2253 could not be re-established (i.e. other peer went down or is
2254 unable / refuses to communicate);
2256 So we should consider:
2257 1) ideally: our own willingness / need to connect
2258 2) prior failures to connect to this peer (by plugin)
2259 3) ideally: reasons why other peer terminated (as far as knowable)
2261 Most importantly, it must be POSSIBLE for another peer to terminate
2262 a connection for a while (without us instantly re-establishing it).
2263 Similarly, if another peer is gone we should quickly notify CORE.
2264 OTOH, if there was a minor glitch (i.e. crash of gnunet-service-transport
2265 on the other end), we should reconnect in such a way that BOTH CORE
2266 services never even notice.
2267 Furthermore, the same mechanism (or small variation) could be used
2268 to switch to a better-performing plugin (ATS).
2270 Finally, this needs to be tested throughly... */
2273 * GNUNET_NO in the call below makes transport disconnect the peer,
2274 * even if only a single address (out of say, six) went away. This
2275 * function must be careful to ONLY disconnect if the peer is gone,
2276 * not just a specific address.
2278 * More specifically, half the places it was used had it WRONG.
2281 /* No reconnect, signal disconnect instead! */
2284 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2285 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&nl->id),
2286 "try_fast_reconnect");
2288 GNUNET_STATISTICS_update (stats,
2289 gettext_noop ("# disconnects due to try_fast_reconnect"),
2293 disconnect_neighbour (nl, GNUNET_YES);
2299 * Function that will be called whenever the plugin internally
2300 * cleans up a session pointer and hence the service needs to
2301 * discard all of those sessions as well. Plugins that do not
2302 * use sessions can simply omit calling this function and always
2303 * use NULL wherever a session pointer is needed.
2305 * @param cls closure
2306 * @param peer which peer was the session for
2307 * @param session which session is being destoyed
2310 plugin_env_session_end (void *cls,
2311 const struct GNUNET_PeerIdentity *peer,
2312 struct Session *session)
2314 struct TransportPlugin *p = cls;
2315 struct NeighbourList *nl;
2316 struct ReadyList *rl;
2317 struct ForeignAddressList *pos;
2318 struct ForeignAddressList *prev;
2321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2322 "Session ended with peer `%4s', %s\n",
2324 "plugin_env_session_end");
2326 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
2327 &remove_session_validations,
2329 nl = find_neighbour (peer);
2333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2334 "No neighbour record found for peer `%4s'\n",
2337 return; /* was never marked as connected */
2342 if (rl->plugin == p)
2349 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2350 "Plugin was associated with peer `%4s'\n",
2353 GNUNET_STATISTICS_update (stats,
2354 gettext_noop ("# disconnects due to session end"),
2357 disconnect_neighbour (nl, GNUNET_YES);
2361 pos = rl->addresses;
2362 while ( (pos != NULL) &&
2363 (pos->session != session) )
2371 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2372 "Session was never marked as ready for peer `%4s'\n",
2376 int validations_pending = GNUNET_CONTAINER_multihashmap_contains (validation_map, &peer->hashPubKey);
2378 /* No session was marked as ready, but we have pending validations so do not disconnect from neighbour */
2379 if (validations_pending ==GNUNET_YES)
2382 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2383 "Not disconnecting from peer `%4s due to pending address validations\n", GNUNET_i2s(peer));
2388 //FIXME: This conflicts with inbound tcp connections and tcp nat ... debugging in progress
2389 GNUNET_STATISTICS_update (stats,
2390 gettext_noop ("# disconnects due to unready session"),
2394 disconnect_neighbour (nl, GNUNET_YES);
2395 return; /* was never marked as connected */
2397 pos->session = NULL;
2398 pos->connected = GNUNET_NO;
2399 if (pos->addrlen != 0)
2401 if (nl->received_pong != GNUNET_NO)
2403 GNUNET_STATISTICS_update (stats,
2404 gettext_noop ("# try_fast_reconnect thanks to plugin_env_session_end"),
2407 if (GNUNET_YES == pos->connected)
2408 try_fast_reconnect (p, nl);
2412 GNUNET_STATISTICS_update (stats,
2413 gettext_noop ("# disconnects due to missing pong"),
2416 /* FIXME this is never true?! See: line 2416*/
2417 if (GNUNET_YES == pos->connected)
2418 disconnect_neighbour (nl, GNUNET_YES);
2423 GNUNET_STATISTICS_update (stats,
2424 gettext_noop ("# connected addresses"),
2428 /* was inbound connection, free 'pos' */
2430 rl->addresses = pos->next;
2432 prev->next = pos->next;
2433 if (GNUNET_SCHEDULER_NO_TASK != pos->revalidate_task)
2435 GNUNET_SCHEDULER_cancel (pos->revalidate_task);
2436 pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
2438 GNUNET_free_non_null(pos->ressources);
2439 GNUNET_free_non_null(pos->quality);
2440 ats_modify_problem_state (ats, ATS_MODIFIED);
2442 if (GNUNET_YES != pos->connected)
2444 /* nothing else to do, connection was never up... */
2450 if (nl->received_pong == GNUNET_NO)
2452 GNUNET_STATISTICS_update (stats,
2453 gettext_noop ("# disconnects due to NO pong"),
2456 disconnect_neighbour (nl, GNUNET_YES);
2457 return; /* nothing to do, never connected... */
2459 /* check if we have any validated addresses left */
2460 pos = rl->addresses;
2463 if (GNUNET_YES == pos->validated)
2465 GNUNET_STATISTICS_update (stats,
2466 gettext_noop ("# try_fast_reconnect thanks to validated_address"),
2469 try_fast_reconnect (p, nl);
2474 /* no valid addresses left, signal disconnect! */
2477 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2478 "Disconnecting peer `%4s', %s\n",
2480 "plugin_env_session_end");
2482 /* FIXME: This doesn't mean there are no addresses left for this PEER,
2483 * it means there aren't any left for this PLUGIN/PEER combination! So
2484 * calling disconnect_neighbour here with GNUNET_NO forces disconnect
2485 * when it isn't necessary. Using GNUNET_YES at least checks to see
2486 * if there are any addresses that work first, so as not to overdo it.
2489 GNUNET_STATISTICS_update (stats,
2490 gettext_noop ("# disconnects due to plugin_env_session_end"),
2493 disconnect_neighbour (nl, GNUNET_YES);
2498 * Function that must be called by each plugin to notify the
2499 * transport service about the addresses under which the transport
2500 * provided by the plugin can be reached.
2502 * @param cls closure
2503 * @param add_remove GNUNET_YES to add, GNUNET_NO to remove the address
2504 * @param addr one of the addresses of the host, NULL for the last address
2505 * the specific address format depends on the transport
2506 * @param addrlen length of the address
2509 plugin_env_notify_address (void *cls,
2514 struct TransportPlugin *p = cls;
2515 struct OwnAddressList *al;
2516 struct OwnAddressList *prev;
2518 GNUNET_assert (p->api != NULL);
2520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2521 (add_remove == GNUNET_YES)
2522 ? "Adding `%s':%s to the set of our addresses\n"
2523 : "Removing `%s':%s from the set of our addresses\n",
2528 GNUNET_assert (addr != NULL);
2529 if (GNUNET_NO == add_remove)
2535 if ( (addrlen == al->addrlen) &&
2536 (0 == memcmp (addr, &al[1], addrlen)) )
2539 p->addresses = al->next;
2541 prev->next = al->next;
2552 al = GNUNET_malloc (sizeof (struct OwnAddressList) + addrlen);
2553 al->next = p->addresses;
2555 al->addrlen = addrlen;
2556 memcpy (&al[1], addr, addrlen);
2562 * Notify all of our clients about a peer connecting.
2565 notify_clients_connect (const struct GNUNET_PeerIdentity *peer,
2566 struct GNUNET_TIME_Relative latency,
2569 struct ConnectInfoMessage * cim;
2570 struct TransportClient *cpos;
2574 if (0 == memcmp (peer,
2576 sizeof (struct GNUNET_PeerIdentity)))
2582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2583 "Notifying clients about connection with `%s'\n",
2586 GNUNET_STATISTICS_update (stats,
2587 gettext_noop ("# peers connected"),
2592 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
2593 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
2597 cim = GNUNET_malloc (size);
2598 cim->header.size = htons (size);
2599 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
2600 cim->ats_count = htonl(2);
2601 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
2602 (&(cim->ats))[0].value = htonl (distance);
2603 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
2604 (&(cim->ats))[1].value = htonl ((uint32_t) latency.rel_value);
2605 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
2606 (&(cim->ats))[2].value = htonl (0);
2607 memcpy (&cim->id, peer, sizeof (struct GNUNET_PeerIdentity));
2609 /* notify ats about connecting peer */
2610 /* notify ats about connecting peer */
2611 if ((ats != NULL) && (shutdown_in_progress == GNUNET_NO))
2613 ats_modify_problem_state(ats, ATS_MODIFIED);
2614 ats_calculate_bandwidth_distribution (ats, stats);
2619 while (cpos != NULL)
2621 transmit_to_client (cpos, &(cim->header), GNUNET_NO);
2630 * Notify all of our clients about a peer disconnecting.
2633 notify_clients_disconnect (const struct GNUNET_PeerIdentity *peer)
2635 struct DisconnectInfoMessage dim;
2636 struct TransportClient *cpos;
2638 if (0 == memcmp (peer,
2640 sizeof (struct GNUNET_PeerIdentity)))
2646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2647 "Notifying clients about lost connection to `%s'\n",
2650 GNUNET_STATISTICS_update (stats,
2651 gettext_noop ("# peers connected"),
2654 dim.header.size = htons (sizeof (struct DisconnectInfoMessage));
2655 dim.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
2656 dim.reserved = htonl (0);
2657 memcpy (&dim.peer, peer, sizeof (struct GNUNET_PeerIdentity));
2659 /* notify ats about connecting peer */
2660 if ((ats != NULL) && (shutdown_in_progress == GNUNET_NO))
2662 ats_modify_problem_state(ats, ATS_MODIFIED);
2663 ats_calculate_bandwidth_distribution (ats, stats);
2667 while (cpos != NULL)
2669 transmit_to_client (cpos, &dim.header, GNUNET_NO);
2676 * Find a ForeignAddressList entry for the given neighbour
2677 * that matches the given address and transport.
2679 * @param neighbour which peer we care about
2680 * @param tname name of the transport plugin
2681 * @param session session to look for, NULL for 'any'; otherwise
2682 * can be used for the service to "learn" this session ID
2684 * @param addr binary address
2685 * @param addrlen length of addr
2686 * @return NULL if no such entry exists
2688 static struct ForeignAddressList *
2689 find_peer_address(struct NeighbourList *neighbour,
2691 struct Session *session,
2695 struct ReadyList *head;
2696 struct ForeignAddressList *pos;
2698 head = neighbour->plugins;
2699 while (head != NULL)
2701 if (0 == strcmp (tname, head->plugin->short_name))
2707 pos = head->addresses;
2708 while ( (pos != NULL) &&
2709 ( (pos->addrlen != addrlen) ||
2710 (memcmp(pos->addr, addr, addrlen) != 0) ) )
2712 if ( (session != NULL) &&
2713 (pos->session == session) )
2717 if ( (session != NULL) && (pos != NULL) )
2718 pos->session = session; /* learn it! */
2724 * Get the peer address struct for the given neighbour and
2725 * address. If it doesn't yet exist, create it.
2727 * @param neighbour which peer we care about
2728 * @param tname name of the transport plugin
2729 * @param session session of the plugin, or NULL for none
2730 * @param addr binary address
2731 * @param addrlen length of addr
2732 * @return NULL if we do not have a transport plugin for 'tname'
2734 static struct ForeignAddressList *
2735 add_peer_address (struct NeighbourList *neighbour,
2737 struct Session *session,
2741 struct ReadyList *head;
2742 struct ForeignAddressList *ret;
2745 ret = find_peer_address (neighbour, tname, session, addr, addrlen);
2748 head = neighbour->plugins;
2750 while (head != NULL)
2752 if (0 == strcmp (tname, head->plugin->short_name))
2758 ret = GNUNET_malloc(sizeof(struct ForeignAddressList) + addrlen);
2759 ret->session = session;
2760 if ((addrlen > 0) && (addr != NULL))
2762 ret->addr = (const char*) &ret[1];
2763 memcpy (&ret[1], addr, addrlen);
2770 ret->ressources = GNUNET_malloc(available_ressources * sizeof (struct ATS_ressource_entry));
2771 for (c=0; c<available_ressources; c++)
2773 struct ATS_ressource_entry *r = ret->ressources;
2775 r[c].atis_index = ressources[c].atis_index;
2776 if (0 == strcmp(neighbour->plugins->plugin->short_name,"unix"))
2778 r[c].c = ressources[c].c_unix;
2780 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"udp"))
2782 r[c].c = ressources[c].c_udp;
2784 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"tcp"))
2786 r[c].c = ressources[c].c_tcp;
2788 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"http"))
2790 r[c].c = ressources[c].c_http;
2792 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"https"))
2794 r[c].c = ressources[c].c_https;
2796 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"wlan"))
2798 r[c].c = ressources[c].c_wlan;
2802 r[c].c = ressources[c].c_default;
2803 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2804 "Assigning default cost to peer `%s' addr plugin `%s'! This should not happen!\n",
2805 GNUNET_i2s(&neighbour->id),
2806 neighbour->plugins->plugin->short_name);
2810 ret->quality = GNUNET_malloc (available_quality_metrics * sizeof (struct ATS_quality_entry));
2811 ret->addrlen = addrlen;
2812 ret->expires = GNUNET_TIME_relative_to_absolute
2813 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2814 ret->latency = GNUNET_TIME_relative_get_forever();
2816 ret->timeout = GNUNET_TIME_relative_to_absolute
2817 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2818 ret->ready_list = head;
2819 ret->next = head->addresses;
2820 head->addresses = ret;
2826 * Closure for 'add_validated_address'.
2828 struct AddValidatedAddressContext
2831 * Entry that has been validated.
2833 const struct ValidationEntry *ve;
2836 * Flag set after we have added the address so
2837 * that we terminate the iteration next time.
2844 * Callback function used to fill a buffer of max bytes with a list of
2845 * addresses in the format used by HELLOs. Should use
2846 * "GNUNET_HELLO_add_address" as a helper function.
2848 * @param cls the 'struct AddValidatedAddressContext' with the validated address
2849 * @param max maximum number of bytes that can be written to buf
2850 * @param buf where to write the address information
2851 * @return number of bytes written, 0 to signal the
2852 * end of the iteration.
2855 add_validated_address (void *cls,
2856 size_t max, void *buf)
2858 struct AddValidatedAddressContext *avac = cls;
2859 const struct ValidationEntry *ve = avac->ve;
2861 if (GNUNET_YES == avac->done)
2863 avac->done = GNUNET_YES;
2864 return GNUNET_HELLO_add_address (ve->transport_name,
2865 GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION),
2875 * Closure for 'check_address_exists'.
2877 struct CheckAddressExistsClosure
2880 * Address to check for.
2885 * Name of the transport.
2892 struct Session *session;
2895 * Set to GNUNET_YES if the address exists.
2908 * Iterator over hash map entries. Checks if the given
2909 * validation entry is for the same address as what is given
2912 * @param cls the 'struct CheckAddressExistsClosure*'
2913 * @param key current key code (ignored)
2914 * @param value value in the hash map ('struct ValidationEntry')
2915 * @return GNUNET_YES if we should continue to
2916 * iterate (mismatch), GNUNET_NO if not (entry matched)
2919 check_address_exists (void *cls,
2920 const GNUNET_HashCode * key,
2923 struct CheckAddressExistsClosure *caec = cls;
2924 struct ValidationEntry *ve = value;
2926 if ( (0 == strcmp (caec->tname,
2927 ve->transport_name)) &&
2928 (caec->addrlen == ve->addrlen) &&
2929 (0 == memcmp (caec->addr,
2933 caec->exists = GNUNET_YES;
2936 if ( (ve->session != NULL) &&
2937 (caec->session == ve->session) )
2939 caec->exists = GNUNET_YES;
2947 neighbour_timeout_task (void *cls,
2948 const struct GNUNET_SCHEDULER_TaskContext *tc)
2950 struct NeighbourList *n = cls;
2953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2954 "Neighbour `%4s' has timed out!\n", GNUNET_i2s (&n->id));
2956 GNUNET_STATISTICS_update (stats,
2957 gettext_noop ("# disconnects due to timeout"),
2960 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2961 disconnect_neighbour (n, GNUNET_NO);
2966 * Schedule the job that will cause us to send a PING to the
2967 * foreign address to evaluate its validity and latency.
2969 * @param fal address to PING
2972 schedule_next_ping (struct ForeignAddressList *fal);
2976 * Add the given address to the list of foreign addresses
2977 * available for the given peer (check for duplicates).
2979 * @param cls the respective 'struct NeighbourList' to update
2980 * @param tname name of the transport
2981 * @param expiration expiration time
2982 * @param addr the address
2983 * @param addrlen length of the address
2984 * @return GNUNET_OK (always)
2987 add_to_foreign_address_list (void *cls,
2989 struct GNUNET_TIME_Absolute expiration,
2993 struct NeighbourList *n = cls;
2994 struct ForeignAddressList *fal;
2997 GNUNET_STATISTICS_update (stats,
2998 gettext_noop ("# valid peer addresses returned by PEERINFO"),
3002 fal = find_peer_address (n, tname, NULL, addr, addrlen);
3005 #if DEBUG_TRANSPORT_HELLO
3006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3007 "Adding address `%s' (%s) for peer `%4s' due to PEERINFO data for %llums.\n",
3008 a2s (tname, addr, addrlen),
3010 GNUNET_i2s (&n->id),
3011 expiration.abs_value);
3013 fal = add_peer_address (n, tname, NULL, addr, addrlen);
3016 GNUNET_STATISTICS_update (stats,
3017 gettext_noop ("# previously validated addresses lacking transport"),
3023 fal->expires = GNUNET_TIME_absolute_max (expiration,
3025 schedule_next_ping (fal);
3031 fal->expires = GNUNET_TIME_absolute_max (expiration,
3037 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3038 "Failed to add new address for `%4s'\n",
3039 GNUNET_i2s (&n->id));
3043 if (fal->validated == GNUNET_NO)
3045 fal->validated = GNUNET_YES;
3046 GNUNET_STATISTICS_update (stats,
3047 gettext_noop ("# peer addresses considered valid"),
3051 if (try == GNUNET_YES)
3054 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3055 "Have new addresses, will try to trigger transmissions.\n");
3057 try_transmission_to_peer (n);
3064 * Add addresses in validated HELLO "h" to the set of addresses
3065 * we have for this peer.
3067 * @param cls closure ('struct NeighbourList*')
3068 * @param peer id of the peer, NULL for last call
3069 * @param h hello message for the peer (can be NULL)
3070 * @param err_msg NULL if successful, otherwise contains error message
3073 add_hello_for_peer (void *cls,
3074 const struct GNUNET_PeerIdentity *peer,
3075 const struct GNUNET_HELLO_Message *h,
3076 const char *err_msg)
3078 struct NeighbourList *n = cls;
3080 if (err_msg != NULL)
3083 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3084 _("Error in communication with PEERINFO service: %s\n"),
3091 GNUNET_STATISTICS_update (stats,
3092 gettext_noop ("# outstanding peerinfo iterate requests"),
3099 return; /* no HELLO available */
3101 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3102 "Peerinfo had `%s' message for peer `%4s', adding existing addresses.\n",
3106 if (GNUNET_YES != n->public_key_valid)
3108 GNUNET_HELLO_get_key (h, &n->publicKey);
3109 n->public_key_valid = GNUNET_YES;
3111 GNUNET_HELLO_iterate_addresses (h,
3113 &add_to_foreign_address_list,
3119 * Create a fresh entry in our neighbour list for the given peer.
3120 * Will try to transmit our current HELLO to the new neighbour.
3121 * Do not call this function directly, use 'setup_peer_check_blacklist.
3123 * @param peer the peer for which we create the entry
3124 * @param do_hello should we schedule transmitting a HELLO
3125 * @return the new neighbour list entry
3127 static struct NeighbourList *
3128 setup_new_neighbour (const struct GNUNET_PeerIdentity *peer,
3131 struct NeighbourList *n;
3132 struct TransportPlugin *tp;
3133 struct ReadyList *rl;
3135 GNUNET_assert (0 != memcmp (peer,
3137 sizeof (struct GNUNET_PeerIdentity)));
3139 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3140 "Setting up state for neighbour `%4s'\n",
3143 GNUNET_STATISTICS_update (stats,
3144 gettext_noop ("# active neighbours"),
3147 n = GNUNET_malloc (sizeof (struct NeighbourList));
3148 n->next = neighbours;
3152 GNUNET_TIME_relative_to_absolute
3153 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
3154 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
3155 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
3156 MAX_BANDWIDTH_CARRY_S);
3160 if ((tp->api->send != NULL) && (!is_blacklisted(peer, tp)))
3162 rl = GNUNET_malloc (sizeof (struct ReadyList));
3164 rl->next = n->plugins;
3167 rl->addresses = NULL;
3171 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
3173 n->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
3174 &neighbour_timeout_task, n);
3177 GNUNET_STATISTICS_update (stats,
3178 gettext_noop ("# peerinfo new neighbor iterate requests"),
3181 GNUNET_STATISTICS_update (stats,
3182 gettext_noop ("# outstanding peerinfo iterate requests"),
3185 n->piter = GNUNET_PEERINFO_iterate (peerinfo, peer,
3186 GNUNET_TIME_UNIT_FOREVER_REL,
3187 &add_hello_for_peer, n);
3189 GNUNET_STATISTICS_update (stats,
3190 gettext_noop ("# HELLO's sent to new neighbors"),
3193 if (NULL != our_hello)
3194 transmit_to_peer (NULL, NULL, 0,
3195 HELLO_ADDRESS_EXPIRATION,
3196 (const char *) our_hello, GNUNET_HELLO_size(our_hello),
3204 * Function called after we have checked if communicating
3205 * with a given peer is acceptable.
3207 * @param cls closure
3208 * @param n NULL if communication is not acceptable
3210 typedef void (*SetupContinuation)(void *cls,
3211 struct NeighbourList *n);
3215 * Information kept for each client registered to perform
3221 * This is a linked list.
3223 struct Blacklisters *next;
3226 * This is a linked list.
3228 struct Blacklisters *prev;
3231 * Client responsible for this entry.
3233 struct GNUNET_SERVER_Client *client;
3236 * Blacklist check that we're currently performing.
3238 struct BlacklistCheck *bc;
3244 * Head of DLL of blacklisting clients.
3246 static struct Blacklisters *bl_head;
3249 * Tail of DLL of blacklisting clients.
3251 static struct Blacklisters *bl_tail;
3255 * Context we use when performing a blacklist check.
3257 struct BlacklistCheck
3261 * This is a linked list.
3263 struct BlacklistCheck *next;
3266 * This is a linked list.
3268 struct BlacklistCheck *prev;
3271 * Peer being checked.
3273 struct GNUNET_PeerIdentity peer;
3276 * Option for setup neighbour afterwards.
3281 * Continuation to call with the result.
3283 SetupContinuation cont;
3291 * Current transmission request handle for this client, or NULL if no
3292 * request is pending.
3294 struct GNUNET_CONNECTION_TransmitHandle *th;
3297 * Our current position in the blacklisters list.
3299 struct Blacklisters *bl_pos;
3302 * Current task performing the check.
3304 GNUNET_SCHEDULER_TaskIdentifier task;
3309 * Head of DLL of active blacklisting queries.
3311 static struct BlacklistCheck *bc_head;
3314 * Tail of DLL of active blacklisting queries.
3316 static struct BlacklistCheck *bc_tail;
3320 * Perform next action in the blacklist check.
3322 * @param cls the 'struct BlacklistCheck*'
3326 do_blacklist_check (void *cls,
3327 const struct GNUNET_SCHEDULER_TaskContext *tc);
3330 * Transmit blacklist query to the client.
3332 * @param cls the 'struct BlacklistCheck'
3333 * @param size number of bytes allowed
3334 * @param buf where to copy the message
3335 * @return number of bytes copied to buf
3338 transmit_blacklist_message (void *cls,
3342 struct BlacklistCheck *bc = cls;
3343 struct Blacklisters *bl;
3344 struct BlacklistMessage bm;
3349 GNUNET_assert (bc->task == GNUNET_SCHEDULER_NO_TASK);
3350 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3352 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3353 "Failed to send blacklist test for peer `%s' to client\n",
3354 GNUNET_i2s (&bc->peer));
3358 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3359 "Sending blacklist test for peer `%s' to client\n",
3360 GNUNET_i2s (&bc->peer));
3363 bm.header.size = htons (sizeof (struct BlacklistMessage));
3364 bm.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_QUERY);
3365 bm.is_allowed = htonl (0);
3367 memcpy (buf, &bm, sizeof (bm));
3368 GNUNET_SERVER_receive_done (bl->client, GNUNET_OK);
3374 * Perform next action in the blacklist check.
3376 * @param cls the 'struct BlacklistCheck*'
3380 do_blacklist_check (void *cls,
3381 const struct GNUNET_SCHEDULER_TaskContext *tc)
3383 struct BlacklistCheck *bc = cls;
3384 struct Blacklisters *bl;
3386 bc->task = GNUNET_SCHEDULER_NO_TASK;
3391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3392 "No blacklist clients active, will now setup neighbour record for peer `%s'\n",
3393 GNUNET_i2s (&bc->peer));
3395 bc->cont (bc->cont_cls,
3396 setup_new_neighbour (&bc->peer, bc->do_hello));
3403 bc->th = GNUNET_SERVER_notify_transmit_ready (bl->client,
3404 sizeof (struct BlacklistMessage),
3405 GNUNET_TIME_UNIT_FOREVER_REL,
3406 &transmit_blacklist_message,
3413 * Obtain a 'struct NeighbourList' for the given peer. If such an entry
3414 * does not yet exist, check the blacklist. If the blacklist says creating
3415 * one is acceptable, create one and call the continuation; otherwise
3416 * call the continuation with NULL.
3418 * @param peer peer to setup or look up a struct NeighbourList for
3419 * @param do_hello should we also schedule sending our HELLO to the peer
3420 * if this is a new record
3421 * @param cont function to call with the 'struct NeigbhbourList*'
3422 * @param cont_cls closure for cont
3425 setup_peer_check_blacklist (const struct GNUNET_PeerIdentity *peer,
3427 SetupContinuation cont,
3430 struct NeighbourList *n;
3431 struct BlacklistCheck *bc;
3433 n = find_neighbour(peer);
3437 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3438 "Neighbour record exists for peer `%s'\n",
3445 if (bl_head == NULL)
3448 cont (cont_cls, setup_new_neighbour (peer, do_hello));
3450 setup_new_neighbour(peer, do_hello);
3453 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3454 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3456 bc->do_hello = do_hello;
3458 bc->cont_cls = cont_cls;
3459 bc->bl_pos = bl_head;
3460 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3466 * Function called with the result of querying a new blacklister about
3467 * it being allowed (or not) to continue to talk to an existing neighbour.
3469 * @param cls the original 'struct NeighbourList'
3470 * @param n NULL if we need to disconnect
3473 confirm_or_drop_neighbour (void *cls,
3474 struct NeighbourList *n)
3476 struct NeighbourList * orig = cls;
3481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3482 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&orig->id),
3483 "confirm_or_drop_neighboUr");
3485 GNUNET_STATISTICS_update (stats,
3486 gettext_noop ("# disconnects due to blacklist"),
3489 disconnect_neighbour (orig, GNUNET_NO);
3495 * Handle a request to start a blacklist.
3497 * @param cls closure (always NULL)
3498 * @param client identification of the client
3499 * @param message the actual message
3502 handle_blacklist_init (void *cls,
3503 struct GNUNET_SERVER_Client *client,
3504 const struct GNUNET_MessageHeader *message)
3506 struct Blacklisters *bl;
3507 struct BlacklistCheck *bc;
3508 struct NeighbourList *n;
3513 if (bl->client == client)
3516 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3521 bl = GNUNET_malloc (sizeof (struct Blacklisters));
3522 bl->client = client;
3523 GNUNET_SERVER_client_keep (client);
3524 GNUNET_CONTAINER_DLL_insert_after (bl_head, bl_tail, bl_tail, bl);
3525 /* confirm that all existing connections are OK! */
3529 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3530 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3532 bc->do_hello = GNUNET_NO;
3533 bc->cont = &confirm_or_drop_neighbour;
3536 if (n == neighbours) /* all would wait for the same client, no need to
3537 create more than just the first task right now */
3538 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3546 * Handle a request to blacklist a peer.
3548 * @param cls closure (always NULL)
3549 * @param client identification of the client
3550 * @param message the actual message
3553 handle_blacklist_reply (void *cls,
3554 struct GNUNET_SERVER_Client *client,
3555 const struct GNUNET_MessageHeader *message)
3557 const struct BlacklistMessage *msg = (const struct BlacklistMessage*) message;
3558 struct Blacklisters *bl;
3559 struct BlacklistCheck *bc;
3562 while ( (bl != NULL) &&
3563 (bl->client != client) )
3568 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3569 "Blacklist client disconnected\n");
3571 /* FIXME: other error handling here!? */
3572 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3577 if (ntohl (msg->is_allowed) == GNUNET_SYSERR)
3580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3581 "Blacklist check failed, peer not allowed\n");
3583 bc->cont (bc->cont_cls, NULL);
3584 GNUNET_CONTAINER_DLL_remove (bc_head, bc_tail, bc);
3590 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3591 "Blacklist check succeeded, continuing with checks\n");
3593 bc->bl_pos = bc->bl_pos->next;
3594 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3597 /* check if any other bc's are waiting for this blacklister */
3601 if ( (bc->bl_pos == bl) &&
3602 (GNUNET_SCHEDULER_NO_TASK == bc->task) )
3603 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3611 * Send periodic PING messages to a given foreign address.
3613 * @param cls our 'struct PeriodicValidationContext*'
3614 * @param tc task context
3617 send_periodic_ping (void *cls,
3618 const struct GNUNET_SCHEDULER_TaskContext *tc)
3620 struct ForeignAddressList *peer_address = cls;
3621 struct TransportPlugin *tp;
3622 struct ValidationEntry *va;
3623 struct NeighbourList *neighbour;
3624 struct TransportPingMessage ping;
3625 struct CheckAddressExistsClosure caec;
3627 uint16_t hello_size;
3631 peer_address->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
3632 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3634 tp = peer_address->ready_list->plugin;
3635 neighbour = peer_address->ready_list->neighbour;
3636 if (GNUNET_YES != neighbour->public_key_valid)
3638 /* no public key yet, try again later */
3639 schedule_next_ping (peer_address);
3642 caec.addr = peer_address->addr;
3643 caec.addrlen = peer_address->addrlen;
3644 caec.tname = tp->short_name;
3645 caec.session = peer_address->session;
3646 caec.exists = GNUNET_NO;
3647 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
3648 &check_address_exists,
3650 if (caec.exists == GNUNET_YES)
3652 /* During validation attempts we will likely trigger the other
3653 peer trying to validate our address which in turn will cause
3654 it to send us its HELLO, so we expect to hit this case rather
3655 frequently. Only print something if we are very verbose. */
3656 #if DEBUG_TRANSPORT > 1
3657 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3658 "Some validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
3659 (peer_address->addr != NULL)
3660 ? a2s (tp->short_name,
3662 peer_address->addrlen)
3665 GNUNET_i2s (&neighbour->id));
3667 schedule_next_ping (peer_address);
3670 va = GNUNET_malloc (sizeof (struct ValidationEntry) + peer_address->addrlen);
3671 va->transport_name = GNUNET_strdup (tp->short_name);
3672 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
3674 va->send_time = GNUNET_TIME_absolute_get();
3675 va->session = peer_address->session;
3676 if (peer_address->addr != NULL)
3678 va->addr = (const void*) &va[1];
3679 memcpy (&va[1], peer_address->addr, peer_address->addrlen);
3680 va->addrlen = peer_address->addrlen;
3682 memcpy(&va->publicKey,
3683 &neighbour->publicKey,
3684 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
3686 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
3687 &timeout_hello_validation,
3689 GNUNET_CONTAINER_multihashmap_put (validation_map,
3690 &neighbour->id.hashPubKey,
3692 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3694 if (peer_address->validated != GNUNET_YES)
3695 hello_size = GNUNET_HELLO_size(our_hello);
3699 tsize = sizeof(struct TransportPingMessage) + hello_size;
3701 if (peer_address->addr != NULL)
3703 slen = strlen (tp->short_name) + 1;
3704 tsize += slen + peer_address->addrlen;
3708 slen = 0; /* make gcc happy */
3710 message_buf = GNUNET_malloc(tsize);
3711 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
3712 ping.challenge = htonl(va->challenge);
3713 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
3714 if (peer_address->validated != GNUNET_YES)
3716 memcpy(message_buf, our_hello, hello_size);
3719 if (peer_address->addr != NULL)
3721 ping.header.size = htons(sizeof(struct TransportPingMessage) +
3722 peer_address->addrlen +
3724 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
3727 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
3729 peer_address->addrlen);
3733 ping.header.size = htons(sizeof(struct TransportPingMessage));
3736 memcpy(&message_buf[hello_size],
3738 sizeof(struct TransportPingMessage));
3740 #if DEBUG_TRANSPORT_REVALIDATION
3741 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3742 "Performing re-validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s'\n",
3743 (peer_address->addr != NULL)
3744 ? a2s (peer_address->plugin->short_name,
3746 peer_address->addrlen)
3749 GNUNET_i2s (&neighbour->id),
3750 "HELLO", hello_size,
3753 if (peer_address->validated != GNUNET_YES)
3754 GNUNET_STATISTICS_update (stats,
3755 gettext_noop ("# PING with HELLO messages sent"),
3759 GNUNET_STATISTICS_update (stats,
3760 gettext_noop ("# PING without HELLO messages sent"),
3763 GNUNET_STATISTICS_update (stats,
3764 gettext_noop ("# PING messages sent for re-validation"),
3767 transmit_to_peer (NULL, peer_address,
3768 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
3769 HELLO_VERIFICATION_TIMEOUT,
3771 GNUNET_YES, neighbour);
3772 GNUNET_free(message_buf);
3773 schedule_next_ping (peer_address);
3778 * Schedule the job that will cause us to send a PING to the
3779 * foreign address to evaluate its validity and latency.
3781 * @param fal address to PING
3784 schedule_next_ping (struct ForeignAddressList *fal)
3786 struct GNUNET_TIME_Relative delay;
3788 if (fal->revalidate_task != GNUNET_SCHEDULER_NO_TASK)
3790 delay = GNUNET_TIME_absolute_get_remaining (fal->expires);
3791 delay.rel_value /= 2; /* do before expiration */
3792 delay = GNUNET_TIME_relative_min (delay,
3793 LATENCY_EVALUATION_MAX_DELAY);
3794 if (GNUNET_YES != fal->estimated)
3796 delay = GNUNET_TIME_UNIT_ZERO;
3797 fal->estimated = GNUNET_YES;
3799 if (GNUNET_YES == fal->connected)
3801 delay = GNUNET_TIME_relative_min (delay,
3802 CONNECTED_LATENCY_EVALUATION_MAX_DELAY);
3804 /* FIXME: also adjust delay based on how close the last
3805 observed latency is to the latency of the best alternative */
3806 /* bound how fast we can go */
3807 delay = GNUNET_TIME_relative_max (delay,
3808 GNUNET_TIME_UNIT_SECONDS);
3809 /* randomize a bit (to avoid doing all at the same time) */
3810 delay.rel_value += GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1000);
3811 fal->revalidate_task = GNUNET_SCHEDULER_add_delayed(delay,
3812 &send_periodic_ping,
3820 * Function that will be called if we receive some payload
3821 * from another peer.
3823 * @param message the payload
3824 * @param n peer who claimed to be the sender
3827 handle_payload_message (const struct GNUNET_MessageHeader *message,
3828 struct NeighbourList *n)
3830 struct InboundMessage *im;
3831 struct TransportClient *cpos;
3834 msize = ntohs (message->size);
3835 if (n->received_pong == GNUNET_NO)
3838 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3839 "Received message of type %u and size %u from `%4s', but no pong yet!\n",
3840 ntohs (message->type),
3841 ntohs (message->size),
3842 GNUNET_i2s (&n->id));
3844 GNUNET_free_non_null (n->pre_connect_message_buffer);
3845 n->pre_connect_message_buffer = GNUNET_malloc (msize);
3846 memcpy (n->pre_connect_message_buffer, message, msize);
3851 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3852 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
3853 ntohs (message->type),
3854 ntohs (message->size),
3855 GNUNET_i2s (&n->id));
3857 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3860 n->quota_violation_count++;
3862 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3863 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
3864 n->in_tracker.available_bytes_per_s__,
3865 n->quota_violation_count);
3867 /* Discount 32k per violation */
3868 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3873 if (n->quota_violation_count > 0)
3875 /* try to add 32k back */
3876 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3878 n->quota_violation_count--;
3881 GNUNET_STATISTICS_update (stats,
3882 gettext_noop ("# payload received from other peers"),
3885 /* transmit message to all clients */
3886 uint32_t ats_count = 2;
3887 size_t size = sizeof (struct InboundMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information) + msize;
3888 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
3891 im = GNUNET_malloc (size);
3892 im->header.size = htons (size);
3893 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
3895 im->ats_count = htonl(ats_count);
3896 /* Setting ATS data */
3897 (&(im->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
3898 (&(im->ats))[0].value = htonl (n->distance);
3899 (&(im->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
3900 (&(im->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
3901 (&(im->ats))[ats_count].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
3902 (&(im->ats))[ats_count].value = htonl (0);
3904 memcpy (&((&(im->ats))[ats_count+1]), message, msize);
3906 while (cpos != NULL)
3908 transmit_to_client (cpos, &im->header, GNUNET_YES);
3916 * Iterator over hash map entries. Checks if the given validation
3917 * entry is for the same challenge as what is given in the PONG.
3919 * @param cls the 'struct TransportPongMessage*'
3920 * @param key peer identity
3921 * @param value value in the hash map ('struct ValidationEntry')
3922 * @return GNUNET_YES if we should continue to
3923 * iterate (mismatch), GNUNET_NO if not (entry matched)
3926 check_pending_validation (void *cls,
3927 const GNUNET_HashCode * key,
3930 const struct TransportPongMessage *pong = cls;
3931 struct ValidationEntry *ve = value;
3932 struct AddValidatedAddressContext avac;
3933 unsigned int challenge = ntohl(pong->challenge);
3934 struct GNUNET_HELLO_Message *hello;
3935 struct GNUNET_PeerIdentity target;
3936 struct NeighbourList *n;
3937 struct ForeignAddressList *fal;
3938 struct OwnAddressList *oal;
3939 struct TransportPlugin *tp;
3940 struct GNUNET_MessageHeader *prem;
3946 ps = ntohs (pong->header.size);
3947 if (ps < sizeof (struct TransportPongMessage))
3949 GNUNET_break_op (0);
3952 addr = (const char*) &pong[1];
3953 slen = strlen (ve->transport_name) + 1;
3954 if ( (ps - sizeof (struct TransportPongMessage) < slen) ||
3955 (ve->challenge != challenge) ||
3956 (addr[slen-1] != '\0') ||
3957 (0 != strcmp (addr, ve->transport_name)) ||
3958 (ntohl (pong->purpose.size)
3959 != sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
3961 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
3962 sizeof (struct GNUNET_PeerIdentity) + ps - sizeof (struct TransportPongMessage)) )
3967 alen = ps - sizeof (struct TransportPongMessage) - slen;
3968 switch (ntohl (pong->purpose.purpose))
3970 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN:
3971 if ( (ve->addrlen + slen != ntohl (pong->addrlen)) ||
3972 (0 != memcmp (&addr[slen],
3976 return GNUNET_YES; /* different entry, keep trying! */
3978 if (0 != memcmp (&pong->pid,
3980 sizeof (struct GNUNET_PeerIdentity)))
3982 GNUNET_break_op (0);
3986 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN,
3991 GNUNET_break_op (0);
3996 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3997 "Confirmed validity of address, peer `%4s' has address `%s' (%s).\n",
3999 a2s (ve->transport_name,
4000 (const struct sockaddr *) ve->addr,
4002 ve->transport_name);
4005 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING:
4006 if (0 != memcmp (&pong->pid,
4008 sizeof (struct GNUNET_PeerIdentity)))
4012 GNUNET_asprintf(&peer, "%s",GNUNET_i2s (&pong->pid));
4014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4015 "Received PONG for different identity: I am `%s', PONG identity: `%s'\n",
4016 GNUNET_i2s (&my_identity),
4022 if (ve->addrlen != 0)
4024 /* must have been for a different validation entry */
4027 tp = find_transport (ve->transport_name);
4033 oal = tp->addresses;
4036 if ( (oal->addrlen == alen) &&
4037 (0 == memcmp (&oal[1],
4045 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4046 _("Not accepting PONG from `%s' with address `%s' since I cannot confirm using this address.\n"),
4047 GNUNET_i2s (&pong->pid),
4048 a2s (ve->transport_name,
4051 /* FIXME: since the sender of the PONG currently uses the
4052 wrong address (see FIMXE there!), we cannot run a
4053 proper check here... */
4059 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING,
4064 GNUNET_break_op (0);
4069 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4070 "Confirmed that peer `%4s' is talking to us using address `%s' (%s) for us.\n",
4072 a2s (ve->transport_name,
4075 ve->transport_name);
4079 GNUNET_break_op (0);
4082 if (GNUNET_TIME_absolute_get_remaining (GNUNET_TIME_absolute_ntoh (pong->expiration)).rel_value == 0)
4084 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4085 _("Received expired signature. Check system time.\n"));
4088 GNUNET_STATISTICS_update (stats,
4089 gettext_noop ("# address validation successes"),
4092 /* create the updated HELLO */
4093 GNUNET_CRYPTO_hash (&ve->publicKey,
4094 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4095 &target.hashPubKey);
4096 if (ve->addr != NULL)
4098 avac.done = GNUNET_NO;
4100 hello = GNUNET_HELLO_create (&ve->publicKey,
4101 &add_validated_address,
4103 GNUNET_PEERINFO_add_peer (peerinfo,
4105 GNUNET_free (hello);
4107 n = find_neighbour (&target);
4110 n->publicKey = ve->publicKey;
4111 n->public_key_valid = GNUNET_YES;
4112 fal = add_peer_address (n,
4117 GNUNET_assert (fal != NULL);
4118 fal->expires = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
4119 fal->validated = GNUNET_YES;
4120 mark_address_connected (fal);
4121 GNUNET_STATISTICS_update (stats,
4122 gettext_noop ("# peer addresses considered valid"),
4125 fal->latency = GNUNET_TIME_absolute_get_duration (ve->send_time);
4126 update_addr_value (fal, GNUNET_TIME_absolute_get_duration (ve->send_time).rel_value, GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4128 schedule_next_ping (fal);
4129 if (n->latency.rel_value == GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
4130 n->latency = fal->latency;
4132 n->latency.rel_value = (fal->latency.rel_value + n->latency.rel_value) / 2;
4134 n->distance = fal->distance;
4135 if (GNUNET_NO == n->received_pong)
4137 n->received_pong = GNUNET_YES;
4138 notify_clients_connect (&target, n->latency, n->distance);
4139 if (NULL != (prem = n->pre_connect_message_buffer))
4141 n->pre_connect_message_buffer = NULL;
4142 handle_payload_message (prem, n);
4146 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4148 GNUNET_SCHEDULER_cancel (n->retry_task);
4149 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4150 try_transmission_to_peer (n);
4154 /* clean up validation entry */
4155 GNUNET_assert (GNUNET_YES ==
4156 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4159 abort_validation (NULL, NULL, ve);
4165 * Function that will be called if we receive a validation
4166 * of an address challenge that we transmitted to another
4167 * peer. Note that the validation should only be considered
4168 * acceptable if the challenge matches AND if the sender
4169 * address is at least a plausible address for this peer
4170 * (otherwise we may be seeing a MiM attack).
4172 * @param cls closure
4173 * @param message the pong message
4174 * @param peer who responded to our challenge
4175 * @param sender_address string describing our sender address (as observed
4176 * by the other peer in binary format)
4177 * @param sender_address_len number of bytes in 'sender_address'
4180 handle_pong (void *cls, const struct GNUNET_MessageHeader *message,
4181 const struct GNUNET_PeerIdentity *peer,
4182 const char *sender_address,
4183 size_t sender_address_len)
4185 if (0 == memcmp (peer,
4187 sizeof (struct GNUNET_PeerIdentity)))
4189 /* PONG send to self, ignore */
4190 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4191 "Receiving `%s' message from myself\n",
4195 #if DEBUG_TRANSPORT > 1
4196 /* we get tons of these that just get discarded, only log
4197 if we are quite verbose */
4198 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4199 "Receiving `%s' message from `%4s'.\n", "PONG",
4202 GNUNET_STATISTICS_update (stats,
4203 gettext_noop ("# PONG messages received"),
4206 if (GNUNET_SYSERR !=
4207 GNUNET_CONTAINER_multihashmap_get_multiple (validation_map,
4209 &check_pending_validation,
4212 /* This is *expected* to happen a lot since we send
4213 PONGs to *all* known addresses of the sender of
4214 the PING, so most likely we get multiple PONGs
4215 per PING, and all but the first PONG will end up
4216 here. So really we should not print anything here
4217 unless we want to be very, very verbose... */
4218 #if DEBUG_TRANSPORT > 2
4219 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4220 "Received `%s' message from `%4s' but have no record of a matching `%s' message. Ignoring.\n",
4232 * Try to validate a neighbour's address by sending him our HELLO and a PING.
4234 * @param cls the 'struct ValidationEntry*'
4235 * @param neighbour neighbour to validate, NULL if validation failed
4238 transmit_hello_and_ping (void *cls,
4239 struct NeighbourList *neighbour)
4241 struct ValidationEntry *va = cls;
4242 struct ForeignAddressList *peer_address;
4243 struct TransportPingMessage ping;
4244 uint16_t hello_size;
4247 struct GNUNET_PeerIdentity id;
4250 GNUNET_CRYPTO_hash (&va->publicKey,
4251 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4253 if (neighbour == NULL)
4255 /* FIXME: stats... */
4256 GNUNET_break (GNUNET_OK ==
4257 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4260 abort_validation (NULL, NULL, va);
4263 neighbour->publicKey = va->publicKey;
4264 neighbour->public_key_valid = GNUNET_YES;
4265 peer_address = add_peer_address (neighbour,
4266 va->transport_name, NULL,
4267 (const void*) &va[1],
4269 if (peer_address == NULL)
4271 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4272 "Failed to add peer `%4s' for plugin `%s'\n",
4273 GNUNET_i2s (&neighbour->id),
4274 va->transport_name);
4275 GNUNET_break (GNUNET_OK ==
4276 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4279 abort_validation (NULL, NULL, va);
4282 if (NULL == our_hello)
4283 refresh_hello_task (NULL, NULL);
4284 hello_size = GNUNET_HELLO_size(our_hello);
4285 slen = strlen(va->transport_name) + 1;
4286 tsize = sizeof(struct TransportPingMessage) + hello_size + va->addrlen + slen;
4287 message_buf = GNUNET_malloc(tsize);
4288 ping.challenge = htonl(va->challenge);
4289 ping.header.size = htons(sizeof(struct TransportPingMessage) + slen + va->addrlen);
4290 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
4291 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
4292 memcpy(message_buf, our_hello, hello_size);
4293 memcpy(&message_buf[hello_size],
4295 sizeof(struct TransportPingMessage));
4296 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
4299 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
4303 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4304 "Performing validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s' (%u bytes)\n",
4307 : a2s (va->transport_name,
4308 (const void*) &va[1], va->addrlen),
4310 GNUNET_i2s (&neighbour->id),
4311 "HELLO", hello_size,
4312 "PING", sizeof (struct TransportPingMessage) + va->addrlen + slen);
4315 GNUNET_STATISTICS_update (stats,
4316 gettext_noop ("# PING messages sent for initial validation"),
4319 transmit_to_peer (NULL, peer_address,
4320 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
4321 HELLO_VERIFICATION_TIMEOUT,
4323 GNUNET_YES, neighbour);
4324 GNUNET_free(message_buf);
4329 * Check if the given address is already being validated; if not,
4330 * append the given address to the list of entries that are being be
4331 * validated and initiate validation.
4333 * @param cls closure ('struct CheckHelloValidatedContext *')
4334 * @param tname name of the transport
4335 * @param expiration expiration time
4336 * @param addr the address
4337 * @param addrlen length of the address
4338 * @return GNUNET_OK (always)
4341 run_validation (void *cls,
4343 struct GNUNET_TIME_Absolute expiration,
4347 struct CheckHelloValidatedContext *chvc = cls;
4348 struct GNUNET_PeerIdentity id;
4349 struct TransportPlugin *tp;
4350 struct ValidationEntry *va;
4351 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4352 struct CheckAddressExistsClosure caec;
4353 struct OwnAddressList *oal;
4355 GNUNET_assert (addr != NULL);
4357 GNUNET_STATISTICS_update (stats,
4358 gettext_noop ("# peer addresses scheduled for validation"),
4361 tp = find_transport (tname);
4364 GNUNET_log (GNUNET_ERROR_TYPE_INFO |
4365 GNUNET_ERROR_TYPE_BULK,
4367 ("Transport `%s' not loaded, will not try to validate peer address using this transport.\n"),
4369 GNUNET_STATISTICS_update (stats,
4370 gettext_noop ("# peer addresses not validated (plugin not available)"),
4375 /* check if this is one of our own addresses */
4376 oal = tp->addresses;
4379 if ( (oal->addrlen == addrlen) &&
4380 (0 == memcmp (&oal[1],
4384 /* not plausible, this address is equivalent to our own address! */
4385 GNUNET_STATISTICS_update (stats,
4386 gettext_noop ("# peer addresses not validated (loopback)"),
4393 GNUNET_HELLO_get_key (chvc->hello, &pk);
4394 GNUNET_CRYPTO_hash (&pk,
4396 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4399 if (is_blacklisted(&id, tp))
4402 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4403 "Attempted to validate blacklisted peer `%s' using `%s'!\n",
4411 caec.addrlen = addrlen;
4412 caec.session = NULL;
4414 caec.exists = GNUNET_NO;
4415 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
4416 &check_address_exists,
4418 if (caec.exists == GNUNET_YES)
4420 /* During validation attempts we will likely trigger the other
4421 peer trying to validate our address which in turn will cause
4422 it to send us its HELLO, so we expect to hit this case rather
4423 frequently. Only print something if we are very verbose. */
4424 #if DEBUG_TRANSPORT > 1
4425 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4426 "Validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
4427 a2s (tname, addr, addrlen),
4431 GNUNET_STATISTICS_update (stats,
4432 gettext_noop ("# peer addresses not validated (in progress)"),
4437 va = GNUNET_malloc (sizeof (struct ValidationEntry) + addrlen);
4440 va->transport_name = GNUNET_strdup (tname);
4441 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
4443 va->send_time = GNUNET_TIME_absolute_get();
4444 va->addr = (const void*) &va[1];
4445 memcpy (&va[1], addr, addrlen);
4446 va->addrlen = addrlen;
4447 GNUNET_HELLO_get_key (chvc->hello,
4449 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
4450 &timeout_hello_validation,
4452 GNUNET_CONTAINER_multihashmap_put (validation_map,
4455 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4456 setup_peer_check_blacklist (&id, GNUNET_NO,
4457 &transmit_hello_and_ping,
4464 * Check if addresses in validated hello "h" overlap with
4465 * those in "chvc->hello" and validate the rest.
4467 * @param cls closure
4468 * @param peer id of the peer, NULL for last call
4469 * @param h hello message for the peer (can be NULL)
4470 * @param err_msg NULL if successful, otherwise contains error message
4473 check_hello_validated (void *cls,
4474 const struct GNUNET_PeerIdentity *peer,
4475 const struct GNUNET_HELLO_Message *h,
4476 const char *err_msg)
4478 struct CheckHelloValidatedContext *chvc = cls;
4479 struct GNUNET_HELLO_Message *plain_hello;
4480 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4481 struct GNUNET_PeerIdentity target;
4482 struct NeighbourList *n;
4484 if (err_msg != NULL)
4487 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4488 _("Error in communication with PEERINFO service: %s\n"),
4496 GNUNET_STATISTICS_update (stats,
4497 gettext_noop ("# outstanding peerinfo iterate requests"),
4501 if (GNUNET_NO == chvc->hello_known)
4503 /* notify PEERINFO about the peer now, so that we at least
4504 have the public key if some other component needs it */
4505 GNUNET_HELLO_get_key (chvc->hello, &pk);
4506 GNUNET_CRYPTO_hash (&pk,
4507 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4508 &target.hashPubKey);
4509 plain_hello = GNUNET_HELLO_create (&pk,
4512 GNUNET_PEERINFO_add_peer (peerinfo, plain_hello);
4513 GNUNET_free (plain_hello);
4514 #if DEBUG_TRANSPORT_HELLO
4515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4516 "PEERINFO had no `%s' message for peer `%4s', full validation needed.\n",
4518 GNUNET_i2s (&target));
4520 GNUNET_STATISTICS_update (stats,
4521 gettext_noop ("# new HELLOs requiring full validation"),
4524 GNUNET_HELLO_iterate_addresses (chvc->hello,
4531 GNUNET_STATISTICS_update (stats,
4532 gettext_noop ("# duplicate HELLO (peer known)"),
4537 if (chvc->ve_count == 0)
4539 GNUNET_CONTAINER_DLL_remove (chvc_head,
4548 #if DEBUG_TRANSPORT_HELLO
4549 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4550 "PEERINFO had `%s' message for peer `%4s', validating only new addresses.\n",
4554 chvc->hello_known = GNUNET_YES;
4555 n = find_neighbour (peer);
4558 #if DEBUG_TRANSPORT_HELLO
4559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4560 "Calling hello_iterate_addresses for %s!\n",
4563 GNUNET_HELLO_iterate_addresses (h,
4565 &add_to_foreign_address_list,
4567 try_transmission_to_peer (n);
4571 #if DEBUG_TRANSPORT_HELLO
4572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4573 "No existing neighbor record for %s!\n",
4576 GNUNET_STATISTICS_update (stats,
4577 gettext_noop ("# no existing neighbour record (validating HELLO)"),
4581 GNUNET_STATISTICS_update (stats,
4582 gettext_noop ("# HELLO validations (update case)"),
4585 GNUNET_HELLO_iterate_new_addresses (chvc->hello,
4587 GNUNET_TIME_relative_to_absolute (HELLO_REVALIDATION_START_TIME),
4594 * Process HELLO-message.
4596 * @param plugin transport involved, may be NULL
4597 * @param message the actual message
4598 * @return GNUNET_OK if the HELLO was well-formed, GNUNET_SYSERR otherwise
4601 process_hello (struct TransportPlugin *plugin,
4602 const struct GNUNET_MessageHeader *message)
4605 struct GNUNET_PeerIdentity target;
4606 const struct GNUNET_HELLO_Message *hello;
4607 struct CheckHelloValidatedContext *chvc;
4608 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
4609 struct NeighbourList *n;
4610 #if DEBUG_TRANSPORT_HELLO > 2
4614 hsize = ntohs (message->size);
4615 if ((ntohs (message->type) != GNUNET_MESSAGE_TYPE_HELLO) ||
4616 (hsize < sizeof (struct GNUNET_MessageHeader)))
4619 return GNUNET_SYSERR;
4621 GNUNET_STATISTICS_update (stats,
4622 gettext_noop ("# HELLOs received for validation"),
4626 hello = (const struct GNUNET_HELLO_Message *) message;
4627 if (GNUNET_OK != GNUNET_HELLO_get_key (hello, &publicKey))
4629 #if DEBUG_TRANSPORT_HELLO
4630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4631 "Unable to get public key from `%s' for `%4s'!\n",
4633 GNUNET_i2s (&target));
4635 GNUNET_break_op (0);
4636 return GNUNET_SYSERR;
4638 GNUNET_CRYPTO_hash (&publicKey,
4639 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4640 &target.hashPubKey);
4642 #if DEBUG_TRANSPORT_HELLO
4643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4644 "Received `%s' message for `%4s'\n",
4646 GNUNET_i2s (&target));
4648 if (0 == memcmp (&my_identity,
4650 sizeof (struct GNUNET_PeerIdentity)))
4652 GNUNET_STATISTICS_update (stats,
4653 gettext_noop ("# HELLOs ignored for validation (is my own HELLO)"),
4658 n = find_neighbour (&target);
4660 (! n->public_key_valid) )
4662 GNUNET_HELLO_get_key (hello, &n->publicKey);
4663 n->public_key_valid = GNUNET_YES;
4666 /* check if load is too high before doing expensive stuff */
4667 if (GNUNET_SCHEDULER_get_load (GNUNET_SCHEDULER_PRIORITY_BACKGROUND) > MAX_HELLO_LOAD)
4669 GNUNET_STATISTICS_update (stats,
4670 gettext_noop ("# HELLOs ignored due to high load"),
4673 #if DEBUG_TRANSPORT_HELLO
4674 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4675 "Ignoring `%s' for `%4s', load too high.\n",
4677 GNUNET_i2s (&target));
4684 while (NULL != chvc)
4686 if (GNUNET_HELLO_equals (hello,
4688 GNUNET_TIME_absolute_get ()).abs_value > 0)
4690 #if DEBUG_TRANSPORT_HELLO > 2
4691 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4692 "Received duplicate `%s' message for `%4s'; ignored\n",
4694 GNUNET_i2s (&target));
4696 return GNUNET_OK; /* validation already pending */
4698 if (GNUNET_HELLO_size (hello) == GNUNET_HELLO_size (chvc->hello))
4699 GNUNET_break (0 != memcmp (hello, chvc->hello,
4700 GNUNET_HELLO_size(hello)));
4705 struct NeighbourList *temp_neighbor = find_neighbour(&target);
4706 if ((NULL != temp_neighbor))
4708 fprintf(stderr, "Already know peer, ignoring hello\n");
4713 #if DEBUG_TRANSPORT_HELLO > 2
4716 my_id = GNUNET_strdup(GNUNET_i2s(plugin->env.my_identity));
4718 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4719 "%s: Starting validation of `%s' message for `%4s' via '%s' of size %u\n",
4722 GNUNET_i2s (&target),
4724 GNUNET_HELLO_size(hello));
4729 chvc = GNUNET_malloc (sizeof (struct CheckHelloValidatedContext) + hsize);
4731 chvc->hello = (const struct GNUNET_HELLO_Message *) &chvc[1];
4732 memcpy (&chvc[1], hello, hsize);
4733 GNUNET_CONTAINER_DLL_insert (chvc_head,
4736 /* finally, check if HELLO was previously validated
4737 (continuation will then schedule actual validation) */
4738 GNUNET_STATISTICS_update (stats,
4739 gettext_noop ("# peerinfo process hello iterate requests"),
4742 GNUNET_STATISTICS_update (stats,
4743 gettext_noop ("# outstanding peerinfo iterate requests"),
4746 chvc->piter = GNUNET_PEERINFO_iterate (peerinfo,
4748 HELLO_VERIFICATION_TIMEOUT,
4749 &check_hello_validated, chvc);
4755 * The peer specified by the given neighbour has timed-out or a plugin
4756 * has disconnected. We may either need to do nothing (other plugins
4757 * still up), or trigger a full disconnect and clean up. This
4758 * function updates our state and does the necessary notifications.
4759 * Also notifies our clients that the neighbour is now officially
4762 * @param n the neighbour list entry for the peer
4763 * @param check GNUNET_YES to check if ALL addresses for this peer
4764 * are gone, GNUNET_NO to force a disconnect of the peer
4765 * regardless of whether other addresses exist.
4768 disconnect_neighbour (struct NeighbourList *n, int check)
4770 struct ReadyList *rpos;
4771 struct NeighbourList *npos;
4772 struct NeighbourList *nprev;
4773 struct MessageQueue *mq;
4774 struct ForeignAddressList *peer_addresses;
4775 struct ForeignAddressList *peer_pos;
4777 if (GNUNET_YES == check)
4780 while (NULL != rpos)
4782 peer_addresses = rpos->addresses;
4783 while (peer_addresses != NULL)
4785 // Do not disconnect if: an address is connected or an inbound address exists
4786 if ((GNUNET_YES == peer_addresses->connected) || (peer_addresses->addrlen == 0))
4789 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4790 "NOT Disconnecting from `%4s', still have live address `%s'!\n",
4791 GNUNET_i2s (&n->id),
4792 a2s (peer_addresses->ready_list->plugin->short_name,
4793 peer_addresses->addr,
4794 peer_addresses->addrlen));
4796 return; /* still connected */
4798 peer_addresses = peer_addresses->next;
4804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4805 "Disconnecting from `%4s'\n",
4806 GNUNET_i2s (&n->id));
4809 /* remove n from neighbours list */
4812 while ((npos != NULL) && (npos != n))
4817 GNUNET_assert (npos != NULL);
4819 neighbours = n->next;
4821 nprev->next = n->next;
4823 /* notify all clients about disconnect */
4824 if (GNUNET_YES == n->received_pong)
4825 notify_clients_disconnect (&n->id);
4827 ats_modify_problem_state(ats, ATS_MODIFIED);
4829 /* clean up all plugins, cancel connections and pending transmissions */
4830 while (NULL != (rpos = n->plugins))
4832 n->plugins = rpos->next;
4833 rpos->plugin->api->disconnect (rpos->plugin->api->cls, &n->id);
4834 while (rpos->addresses != NULL)
4836 peer_pos = rpos->addresses;
4837 rpos->addresses = peer_pos->next;
4838 if (peer_pos->connected == GNUNET_YES)
4839 GNUNET_STATISTICS_update (stats,
4840 gettext_noop ("# connected addresses"),
4843 if (GNUNET_YES == peer_pos->validated)
4844 GNUNET_STATISTICS_update (stats,
4845 gettext_noop ("# peer addresses considered valid"),
4848 if (GNUNET_SCHEDULER_NO_TASK != peer_pos->revalidate_task)
4850 GNUNET_SCHEDULER_cancel (peer_pos->revalidate_task);
4851 peer_pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
4853 GNUNET_free(peer_pos->ressources);
4854 peer_pos->ressources = NULL;
4855 GNUNET_free(peer_pos->quality);
4856 peer_pos->ressources = NULL;
4857 GNUNET_free(peer_pos);
4862 /* free all messages on the queue */
4863 while (NULL != (mq = n->messages_head))
4865 GNUNET_STATISTICS_update (stats,
4866 gettext_noop ("# bytes in message queue for other peers"),
4867 - (int64_t) mq->message_buf_size,
4869 GNUNET_STATISTICS_update (stats,
4870 gettext_noop ("# bytes discarded due to disconnect"),
4871 mq->message_buf_size,
4873 GNUNET_CONTAINER_DLL_remove (n->messages_head,
4876 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
4878 sizeof(struct GNUNET_PeerIdentity)));
4882 while (NULL != (mq = n->cont_head))
4885 GNUNET_CONTAINER_DLL_remove (n->cont_head,
4888 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
4890 sizeof(struct GNUNET_PeerIdentity)));
4894 if (n->timeout_task != GNUNET_SCHEDULER_NO_TASK)
4896 GNUNET_SCHEDULER_cancel (n->timeout_task);
4897 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4899 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4901 GNUNET_SCHEDULER_cancel (n->retry_task);
4902 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4904 if (n->piter != NULL)
4906 GNUNET_PEERINFO_iterate_cancel (n->piter);
4907 GNUNET_STATISTICS_update (stats,
4908 gettext_noop ("# outstanding peerinfo iterate requests"),
4913 /* finally, free n itself */
4914 GNUNET_STATISTICS_update (stats,
4915 gettext_noop ("# active neighbours"),
4918 GNUNET_free_non_null (n->pre_connect_message_buffer);
4924 * We have received a PING message from someone. Need to send a PONG message
4925 * in response to the peer by any means necessary.
4928 handle_ping (void *cls, const struct GNUNET_MessageHeader *message,
4929 const struct GNUNET_PeerIdentity *peer,
4930 struct Session *session,
4931 const char *sender_address,
4932 uint16_t sender_address_len)
4934 struct TransportPlugin *plugin = cls;
4935 struct SessionHeader *session_header = (struct SessionHeader*) session;
4936 struct TransportPingMessage *ping;
4937 struct TransportPongMessage *pong;
4938 struct NeighbourList *n;
4939 struct ReadyList *rl;
4940 struct ForeignAddressList *fal;
4941 struct OwnAddressList *oal;
4947 if (ntohs (message->size) < sizeof (struct TransportPingMessage))
4949 GNUNET_break_op (0);
4950 return GNUNET_SYSERR;
4953 ping = (struct TransportPingMessage *) message;
4954 if (0 != memcmp (&ping->target,
4955 plugin->env.my_identity,
4956 sizeof (struct GNUNET_PeerIdentity)))
4959 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4960 _("Received `%s' message from `%s' destined for `%s' which is not me!\n"),
4962 (sender_address != NULL)
4963 ? a2s (plugin->short_name,
4964 (const struct sockaddr *)sender_address,
4967 GNUNET_i2s (&ping->target));
4969 return GNUNET_SYSERR;
4972 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4973 "Processing `%s' from `%s'\n",
4975 (sender_address != NULL)
4976 ? a2s (plugin->short_name,
4977 (const struct sockaddr *)sender_address,
4981 GNUNET_STATISTICS_update (stats,
4982 gettext_noop ("# PING messages received"),
4985 addr = (const char*) &ping[1];
4986 alen = ntohs (message->size) - sizeof (struct TransportPingMessage);
4987 slen = strlen (plugin->short_name) + 1;
4990 /* peer wants to confirm that we have an outbound connection to him */
4991 if (session == NULL)
4993 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4994 _("Refusing to create PONG since I do not have a session with `%s'.\n"),
4996 return GNUNET_SYSERR;
4998 /* FIXME-urg: the use of 'sender_address' in the code below is doubly-wrong:
4999 1) it is NULL when we need to have a real value
5000 2) it is documented to be the address of the sender (source-IP), where
5001 what we actually want is our LISTEN IP (what we 'bound' to); which we don't even
5004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5005 "Creating PONG indicating that we received a connection at our address `%s' from `%s'.\n",
5006 a2s (plugin->short_name,
5008 sender_address_len),
5011 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5012 pong->header.size = htons (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5013 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5014 pong->purpose.size =
5015 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5017 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5018 sizeof (struct GNUNET_PeerIdentity) + sender_address_len + slen);
5019 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING);
5020 pong->challenge = ping->challenge;
5021 pong->addrlen = htonl(sender_address_len + slen);
5024 sizeof(struct GNUNET_PeerIdentity));
5028 if ((sender_address!=NULL) && (sender_address_len > 0))
5029 memcpy (&((char*)&pong[1])[slen],
5031 sender_address_len);
5032 if (GNUNET_TIME_absolute_get_remaining (session_header->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4)
5034 /* create / update cached sig */
5036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5037 "Creating PONG signature to indicate active connection.\n");
5039 session_header->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5040 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5041 GNUNET_assert (GNUNET_OK ==
5042 GNUNET_CRYPTO_rsa_sign (my_private_key,
5044 &session_header->pong_signature));
5048 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5050 memcpy (&pong->signature,
5051 &session_header->pong_signature,
5052 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5058 /* peer wants to confirm that this is one of our addresses */
5062 plugin->api->check_address (plugin->api->cls,
5066 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5067 _("Not confirming PING with address `%s' since I cannot confirm having this address.\n"),
5068 a2s (plugin->short_name,
5073 oal = plugin->addresses;
5076 if ( (oal->addrlen == alen) &&
5083 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + alen + slen);
5084 pong->header.size = htons (sizeof (struct TransportPongMessage) + alen + slen);
5085 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5086 pong->purpose.size =
5087 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5089 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5090 sizeof (struct GNUNET_PeerIdentity) + alen + slen);
5091 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN);
5092 pong->challenge = ping->challenge;
5093 pong->addrlen = htonl(alen + slen);
5096 sizeof(struct GNUNET_PeerIdentity));
5097 memcpy (&pong[1], plugin->short_name, slen);
5098 memcpy (&((char*)&pong[1])[slen], addr, alen);
5099 if ( (oal != NULL) &&
5100 (GNUNET_TIME_absolute_get_remaining (oal->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4) )
5102 /* create / update cached sig */
5104 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5105 "Creating PONG signature to indicate ownership.\n");
5107 oal->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5108 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5109 GNUNET_assert (GNUNET_OK ==
5110 GNUNET_CRYPTO_rsa_sign (my_private_key,
5112 &oal->pong_signature));
5113 memcpy (&pong->signature,
5114 &oal->pong_signature,
5115 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5117 else if (oal == NULL)
5119 /* not using cache (typically DV-only) */
5120 pong->expiration = GNUNET_TIME_absolute_hton (GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5121 GNUNET_assert (GNUNET_OK ==
5122 GNUNET_CRYPTO_rsa_sign (my_private_key,
5128 /* can used cached version */
5129 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5130 memcpy (&pong->signature,
5131 &oal->pong_signature,
5132 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5135 n = find_neighbour(peer);
5136 GNUNET_assert (n != NULL);
5137 did_pong = GNUNET_NO;
5138 /* first try reliable response transmission */
5142 fal = rl->addresses;
5145 if (-1 != rl->plugin->api->send (rl->plugin->api->cls,
5148 ntohs (pong->header.size),
5149 TRANSPORT_PONG_PRIORITY,
5150 HELLO_VERIFICATION_TIMEOUT,
5157 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5158 "Transmitted PONG to `%s' via reliable mechanism\n",
5161 GNUNET_STATISTICS_update (stats,
5162 gettext_noop ("# PONGs unicast via reliable transport"),
5168 did_pong = GNUNET_YES;
5173 /* no reliable method found, do multicast */
5174 GNUNET_STATISTICS_update (stats,
5175 gettext_noop ("# PONGs multicast to all available addresses"),
5181 fal = rl->addresses;
5184 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5185 "Transmitting PONG to `%s' via unreliable mechanism `%s':%s\n",
5187 a2s (rl->plugin->short_name,
5190 rl->plugin->short_name);
5191 transmit_to_peer(NULL, fal,
5192 TRANSPORT_PONG_PRIORITY,
5193 HELLO_VERIFICATION_TIMEOUT,
5195 ntohs(pong->header.size),
5198 did_pong = GNUNET_YES;
5204 if (GNUNET_YES != did_pong)
5205 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5206 _("Could not send PONG to `%s': no address available\n"),
5213 * Function called by the plugin for each received message. Update
5214 * data volumes, possibly notify plugins about reducing the rate at
5215 * which they read from the socket and generally forward to our
5218 * @param cls the "struct TransportPlugin *" we gave to the plugin
5219 * @param peer (claimed) identity of the other peer
5220 * @param message the message, NULL if we only care about
5221 * learning about the delay until we should receive again
5222 * @param ats_data information for automatic transport selection
5223 * @param ats_count number of elements in ats not including 0-terminator
5224 * @param session identifier used for this session (can be NULL)
5225 * @param sender_address binary address of the sender (if observed)
5226 * @param sender_address_len number of bytes in sender_address
5227 * @return how long in ms the plugin should wait until receiving more data
5228 * (plugins that do not support this, can ignore the return value)
5230 static struct GNUNET_TIME_Relative
5231 plugin_env_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
5232 const struct GNUNET_MessageHeader *message,
5233 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
5235 struct Session *session,
5236 const char *sender_address,
5237 uint16_t sender_address_len)
5239 struct TransportPlugin *plugin = cls;
5240 struct ReadyList *service_context;
5241 struct ForeignAddressList *peer_address;
5243 struct NeighbourList *n;
5244 struct GNUNET_TIME_Relative ret;
5248 if (0 == memcmp (peer,
5250 sizeof (struct GNUNET_PeerIdentity)))
5252 /* refuse to receive from myself */
5254 return GNUNET_TIME_UNIT_FOREVER_REL;
5256 if (is_blacklisted (peer, plugin))
5257 return GNUNET_TIME_UNIT_FOREVER_REL;
5258 n = find_neighbour (peer);
5260 n = setup_new_neighbour (peer, GNUNET_YES);
5261 service_context = n->plugins;
5262 while ((service_context != NULL) && (plugin != service_context->plugin))
5263 service_context = service_context->next;
5264 GNUNET_assert ((plugin->api->send == NULL) || (service_context != NULL));
5265 peer_address = NULL;
5268 for (c=0; c<ats_count; c++)
5269 if (ntohl(ats_data[c].type) == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
5270 distance = ntohl(ats_data[c].value);
5273 if (message != NULL)
5275 if ( (session != NULL) ||
5276 (sender_address != NULL) )
5277 peer_address = add_peer_address (n,
5281 sender_address_len);
5282 if (peer_address != NULL)
5284 update_addr_ats(peer_address, ats_data, ats_count);
5285 update_addr_value(peer_address, distance, GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5287 peer_address->distance = distance;
5288 if (GNUNET_YES == peer_address->validated)
5289 mark_address_connected (peer_address);
5290 peer_address->timeout
5291 = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5292 schedule_next_ping (peer_address);
5294 /* update traffic received amount ... */
5295 msize = ntohs (message->size);
5297 GNUNET_STATISTICS_update (stats,
5298 gettext_noop ("# bytes received from other peers"),
5301 n->distance = distance;
5303 GNUNET_TIME_relative_to_absolute
5304 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5305 GNUNET_SCHEDULER_cancel (n->timeout_task);
5307 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
5308 &neighbour_timeout_task, n);
5309 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
5311 /* dropping message due to frequent inbound volume violations! */
5312 GNUNET_log (GNUNET_ERROR_TYPE_WARNING |
5313 GNUNET_ERROR_TYPE_BULK,
5315 ("Dropping incoming message due to repeated bandwidth quota (%u b/s) violations (total of %u).\n"),
5316 n->in_tracker.available_bytes_per_s__,
5317 n->quota_violation_count);
5318 GNUNET_STATISTICS_update (stats,
5319 gettext_noop ("# bandwidth quota violations by other peers"),
5322 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
5324 if ((ntohs(message->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_ATS) &&
5325 (ntohs(message->size) == (sizeof (struct GNUNET_MessageHeader) + sizeof (uint32_t))))
5327 uint32_t value = ntohl(*((uint32_t *) &message[1]));
5328 //GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "GNUNET_MESSAGE_TYPE_TRANSPORT_ATS: %i \n", value);
5329 /* Force ressource and quality update */
5330 if ((value == 4) && (ats != NULL))
5331 ats_modify_problem_state(ats, ATS_QUALITY_COST_UPDATED);
5332 /* Force cost update */
5333 if ((value == 3) && (ats != NULL))
5334 ats_modify_problem_state(ats, ATS_COST_UPDATED);
5335 /* Force quality update */
5336 if ((value == 2) && (ats != NULL))
5337 ats_modify_problem_state(ats, ATS_QUALITY_UPDATED);
5338 /* Force full rebuild */
5339 if ((value == 1) && (ats != NULL))
5340 ats_modify_problem_state(ats, ATS_MODIFIED);
5344 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5345 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
5346 ntohs (message->type),
5347 ntohs (message->size),
5350 switch (ntohs (message->type))
5352 case GNUNET_MESSAGE_TYPE_HELLO:
5353 GNUNET_STATISTICS_update (stats,
5354 gettext_noop ("# HELLO messages received from other peers"),
5357 process_hello (plugin, message);
5359 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
5360 handle_ping (plugin, message, peer, session, sender_address, sender_address_len);
5361 if (! n->received_pong)
5362 transmit_plain_ping (n);
5364 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
5365 handle_pong (plugin, message, peer, sender_address, sender_address_len);
5367 case GNUNET_MESSAGE_TYPE_TRANSPORT_ATS:
5370 handle_payload_message (message, n);
5374 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 0);
5375 if (ret.rel_value > 0)
5378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5379 "Throttling read (%llu bytes excess at %u b/s), waiting %llu ms before reading more.\n",
5380 (unsigned long long) n->in_tracker.consumption_since_last_update__,
5381 (unsigned int) n->in_tracker.available_bytes_per_s__,
5382 (unsigned long long) ret.rel_value);
5384 GNUNET_STATISTICS_update (stats,
5385 gettext_noop ("# ms throttling suggested"),
5386 (int64_t) ret.rel_value,
5393 * Handle START-message. This is the first message sent to us
5394 * by any client which causes us to add it to our list.
5396 * @param cls closure (always NULL)
5397 * @param client identification of the client
5398 * @param message the actual message
5401 handle_start (void *cls,
5402 struct GNUNET_SERVER_Client *client,
5403 const struct GNUNET_MessageHeader *message)
5405 const struct StartMessage *start;
5406 struct TransportClient *c;
5407 struct ConnectInfoMessage * cim;
5408 struct NeighbourList *n;
5412 start = (const struct StartMessage*) message;
5414 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5415 "Received `%s' request from client\n", "START");
5420 if (c->client == client)
5422 /* client already on our list! */
5424 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5429 if ( (GNUNET_NO != ntohl (start->do_check)) &&
5430 (0 != memcmp (&start->self,
5432 sizeof (struct GNUNET_PeerIdentity))) )
5434 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5435 _("Rejecting control connection from peer `%s', which is not me!\n"),
5436 GNUNET_i2s (&start->self));
5437 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5440 c = GNUNET_malloc (sizeof (struct TransportClient));
5444 if (our_hello != NULL)
5447 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5448 "Sending our own `%s' to new client\n", "HELLO");
5450 transmit_to_client (c,
5451 (const struct GNUNET_MessageHeader *) our_hello,
5453 /* tell new client about all existing connections */
5455 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
5456 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
5460 cim = GNUNET_malloc (size);
5461 cim->header.size = htons (size);
5462 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
5463 cim->ats_count = htonl(ats_count);
5464 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
5465 (&(cim->ats))[2].value = htonl (0);
5469 if (GNUNET_YES == n->received_pong)
5471 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5472 (&(cim->ats))[0].value = htonl (n->distance);
5473 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
5474 (&(cim->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
5476 transmit_to_client (c, &cim->header, GNUNET_NO);
5484 #if DEBUG_TRANSPORT_HELLO
5485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5486 "No HELLO created yet, will transmit HELLO to client later!\n");
5490 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5495 * Handle HELLO-message.
5497 * @param cls closure (always NULL)
5498 * @param client identification of the client
5499 * @param message the actual message
5502 handle_hello (void *cls,
5503 struct GNUNET_SERVER_Client *client,
5504 const struct GNUNET_MessageHeader *message)
5508 GNUNET_STATISTICS_update (stats,
5509 gettext_noop ("# HELLOs received from clients"),
5512 ret = process_hello (NULL, message);
5513 GNUNET_SERVER_receive_done (client, ret);
5518 * Closure for 'transmit_client_message'; followed by
5519 * 'msize' bytes of the actual message.
5521 struct TransmitClientMessageContext
5524 * Client on whom's behalf we are sending.
5526 struct GNUNET_SERVER_Client *client;
5529 * Timeout for the transmission.
5531 struct GNUNET_TIME_Absolute timeout;
5539 * Size of the message in bytes.
5546 * Schedule transmission of a message we got from a client to a peer.
5548 * @param cls the 'struct TransmitClientMessageContext*'
5549 * @param n destination, or NULL on error (in that case, drop the message)
5552 transmit_client_message (void *cls,
5553 struct NeighbourList *n)
5555 struct TransmitClientMessageContext *tcmc = cls;
5556 struct TransportClient *tc;
5559 while ((tc != NULL) && (tc->client != tcmc->client))
5564 transmit_to_peer (tc, NULL, tcmc->priority,
5565 GNUNET_TIME_absolute_get_remaining (tcmc->timeout),
5567 tcmc->msize, GNUNET_NO, n);
5569 GNUNET_SERVER_receive_done (tcmc->client, GNUNET_OK);
5570 GNUNET_SERVER_client_drop (tcmc->client);
5576 * Handle SEND-message.
5578 * @param cls closure (always NULL)
5579 * @param client identification of the client
5580 * @param message the actual message
5583 handle_send (void *cls,
5584 struct GNUNET_SERVER_Client *client,
5585 const struct GNUNET_MessageHeader *message)
5587 const struct OutboundMessage *obm;
5588 const struct GNUNET_MessageHeader *obmm;
5589 struct TransmitClientMessageContext *tcmc;
5593 size = ntohs (message->size);
5595 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
5598 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5601 GNUNET_STATISTICS_update (stats,
5602 gettext_noop ("# payload received for other peers"),
5605 obm = (const struct OutboundMessage *) message;
5606 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
5607 msize = size - sizeof (struct OutboundMessage);
5609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5610 "Received `%s' request from client with target `%4s' and message of type %u and size %u\n",
5611 "SEND", GNUNET_i2s (&obm->peer),
5615 tcmc = GNUNET_malloc (sizeof (struct TransmitClientMessageContext) + msize);
5616 tcmc->client = client;
5617 tcmc->priority = ntohl (obm->priority);
5618 tcmc->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_ntoh (obm->timeout));
5619 tcmc->msize = msize;
5620 /* FIXME: this memcpy can be up to 7% of our total runtime */
5621 memcpy (&tcmc[1], obmm, msize);
5622 GNUNET_SERVER_client_keep (client);
5623 setup_peer_check_blacklist (&obm->peer, GNUNET_YES,
5624 &transmit_client_message,
5630 * Handle request connect message
5632 * @param cls closure (always NULL)
5633 * @param client identification of the client
5634 * @param message the actual message
5637 handle_request_connect (void *cls,
5638 struct GNUNET_SERVER_Client *client,
5639 const struct GNUNET_MessageHeader *message)
5641 const struct TransportRequestConnectMessage *trcm =
5642 (const struct TransportRequestConnectMessage *) message;
5644 GNUNET_STATISTICS_update (stats,
5645 gettext_noop ("# REQUEST CONNECT messages received"),
5649 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
5650 "Received a request connect message for peer `%s'\n",
5651 GNUNET_i2s(&trcm->peer));
5653 setup_peer_check_blacklist (&trcm->peer, GNUNET_YES,
5655 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5660 * Handle SET_QUOTA-message.
5662 * @param cls closure (always NULL)
5663 * @param client identification of the client
5664 * @param message the actual message
5667 handle_set_quota (void *cls,
5668 struct GNUNET_SERVER_Client *client,
5669 const struct GNUNET_MessageHeader *message)
5671 const struct QuotaSetMessage *qsm =
5672 (const struct QuotaSetMessage *) message;
5673 struct NeighbourList *n;
5675 GNUNET_STATISTICS_update (stats,
5676 gettext_noop ("# SET QUOTA messages received"),
5679 n = find_neighbour (&qsm->peer);
5682 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5683 GNUNET_STATISTICS_update (stats,
5684 gettext_noop ("# SET QUOTA messages ignored (no such peer)"),
5690 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5691 "Received `%s' request (new quota %u, old quota %u) from client for peer `%4s'\n",
5693 (unsigned int) ntohl (qsm->quota.value__),
5694 (unsigned int) n->in_tracker.available_bytes_per_s__,
5695 GNUNET_i2s (&qsm->peer));
5697 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker,
5699 if (0 == ntohl (qsm->quota.value__))
5702 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5703 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&n->id),
5706 GNUNET_STATISTICS_update (stats,
5707 gettext_noop ("# disconnects due to quota of 0"),
5710 disconnect_neighbour (n, GNUNET_NO);
5712 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5717 * Take the given address and append it to the set of results sent back to
5720 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
5721 * @param address the resolved name, NULL to indicate the last response
5724 transmit_address_to_client (void *cls, const char *address)
5726 struct GNUNET_SERVER_TransmitContext *tc = cls;
5729 if (NULL != address)
5731 slen = strlen (address) + 1;
5732 GNUNET_SERVER_transmit_context_append_data (tc, address, slen,
5733 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5737 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
5743 * Handle AddressLookup-message.
5745 * @param cls closure (always NULL)
5746 * @param client identification of the client
5747 * @param message the actual message
5750 handle_address_lookup (void *cls,
5751 struct GNUNET_SERVER_Client *client,
5752 const struct GNUNET_MessageHeader *message)
5754 const struct AddressLookupMessage *alum;
5755 struct TransportPlugin *lsPlugin;
5756 const char *nameTransport;
5757 const char *address;
5759 struct GNUNET_SERVER_TransmitContext *tc;
5760 struct GNUNET_TIME_Absolute timeout;
5761 struct GNUNET_TIME_Relative rtimeout;
5764 size = ntohs (message->size);
5765 if (size < sizeof (struct AddressLookupMessage))
5767 GNUNET_break_op (0);
5768 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5771 alum = (const struct AddressLookupMessage *) message;
5772 uint32_t addressLen = ntohl (alum->addrlen);
5773 if (size <= sizeof (struct AddressLookupMessage) + addressLen)
5775 GNUNET_break_op (0);
5776 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5779 address = (const char *) &alum[1];
5780 nameTransport = (const char *) &address[addressLen];
5782 [size - sizeof (struct AddressLookupMessage) - addressLen - 1] != '\0')
5784 GNUNET_break_op (0);
5785 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5788 timeout = GNUNET_TIME_absolute_ntoh (alum->timeout);
5789 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5790 numeric = ntohl (alum->numeric_only);
5791 lsPlugin = find_transport (nameTransport);
5792 if (NULL == lsPlugin)
5794 tc = GNUNET_SERVER_transmit_context_create (client);
5795 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5796 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5797 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
5800 GNUNET_SERVER_disable_receive_done_warning (client);
5801 tc = GNUNET_SERVER_transmit_context_create (client);
5802 lsPlugin->api->address_pretty_printer (lsPlugin->api->cls,
5804 address, addressLen,
5807 &transmit_address_to_client, tc);
5811 * Handle PeerAddressLookupMessage.
5813 * @param cls closure (always NULL)
5814 * @param client identification of the client
5815 * @param message the actual message
5818 handle_peer_address_lookup (void *cls,
5819 struct GNUNET_SERVER_Client *client,
5820 const struct GNUNET_MessageHeader *message)
5822 const struct PeerAddressLookupMessage *peer_address_lookup;
5823 struct NeighbourList *neighbor_iterator;
5824 struct ReadyList *ready_iterator;
5825 struct ForeignAddressList *foreign_address_iterator;
5826 struct TransportPlugin *transport_plugin;
5829 struct GNUNET_SERVER_TransmitContext *tc;
5830 struct GNUNET_TIME_Absolute timeout;
5831 struct GNUNET_TIME_Relative rtimeout;
5834 size = ntohs (message->size);
5835 if (size < sizeof (struct PeerAddressLookupMessage))
5837 GNUNET_break_op (0);
5838 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5841 peer_address_lookup = (const struct PeerAddressLookupMessage *) message;
5843 timeout = GNUNET_TIME_absolute_ntoh (peer_address_lookup->timeout);
5844 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5846 neighbor_iterator = neighbours;
5847 while (neighbor_iterator != NULL)
5849 if (0 == memcmp(&neighbor_iterator->id, &peer_address_lookup->peer, sizeof(struct GNUNET_PeerIdentity)))
5851 neighbor_iterator = neighbor_iterator->next;
5854 /* Found no neighbor matching this peer id (shouldn't be possible, but...) */
5855 if (neighbor_iterator == NULL)
5858 tc = GNUNET_SERVER_transmit_context_create (client);
5859 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5860 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5861 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
5865 ready_iterator = neighbor_iterator->plugins;
5866 GNUNET_SERVER_disable_receive_done_warning (client);
5867 tc = GNUNET_SERVER_transmit_context_create (client);
5868 while(ready_iterator != NULL)
5870 foreign_address_iterator = ready_iterator->addresses;
5871 while (foreign_address_iterator != NULL)
5873 transport_plugin = foreign_address_iterator->ready_list->plugin;
5874 if (foreign_address_iterator->addr != NULL)
5876 GNUNET_asprintf (&addr_buf, "%s --- %s",
5877 a2s (transport_plugin->short_name,
5878 foreign_address_iterator->addr,
5879 foreign_address_iterator->addrlen),
5880 (foreign_address_iterator->connected
5881 == GNUNET_YES) ? "CONNECTED"
5883 transmit_address_to_client(tc, addr_buf);
5884 GNUNET_free(addr_buf);
5886 else if (foreign_address_iterator->addrlen == 0)
5888 GNUNET_asprintf (&addr_buf, "%s --- %s", "<inbound>",
5889 (foreign_address_iterator->connected
5890 == GNUNET_YES) ? "CONNECTED"
5892 transmit_address_to_client (tc, addr_buf);
5893 GNUNET_free(addr_buf);
5896 foreign_address_iterator = foreign_address_iterator->next;
5898 ready_iterator = ready_iterator->next;
5900 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5901 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5902 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
5906 * Handle AddressIterateMessage
5908 * @param cls closure (always NULL)
5909 * @param client identification of the client
5910 * @param message the actual message
5913 handle_address_iterate (void *cls,
5914 struct GNUNET_SERVER_Client *client,
5915 const struct GNUNET_MessageHeader *message)
5917 const struct AddressIterateMessage *address_iterate;
5918 struct NeighbourList *neighbor_iterator;
5919 struct ReadyList *ready_iterator;
5920 struct ForeignAddressList *foreign_address_iterator;
5921 struct TransportPlugin *transport_plugin;
5924 struct GNUNET_SERVER_TransmitContext *tc;
5925 struct GNUNET_TIME_Absolute timeout;
5926 struct GNUNET_TIME_Relative rtimeout;
5929 size = ntohs (message->size);
5930 if (size < sizeof (struct AddressIterateMessage))
5932 GNUNET_break_op (0);
5933 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5936 address_iterate = (const struct AddressIterateMessage *) message;
5938 timeout = GNUNET_TIME_absolute_ntoh (address_iterate->timeout);
5939 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5941 GNUNET_SERVER_disable_receive_done_warning (client);
5942 tc = GNUNET_SERVER_transmit_context_create (client);
5944 neighbor_iterator = neighbours;
5945 while (neighbor_iterator != NULL)
5947 ready_iterator = neighbor_iterator->plugins;
5948 while (ready_iterator != NULL)
5950 foreign_address_iterator = ready_iterator->addresses;
5951 while (foreign_address_iterator != NULL)
5953 transport_plugin = foreign_address_iterator->ready_list->plugin;
5954 if (foreign_address_iterator->addr != NULL)
5956 GNUNET_asprintf (&addr_buf, "%s:%s --- %s",
5957 GNUNET_i2s(&neighbor_iterator->id),
5958 a2s (transport_plugin->short_name,
5959 foreign_address_iterator->addr,
5960 foreign_address_iterator->addrlen),
5961 (foreign_address_iterator->connected
5962 == GNUNET_YES) ? "CONNECTED"
5964 transmit_address_to_client (tc, addr_buf);
5965 GNUNET_free(addr_buf);
5967 else if (foreign_address_iterator->addrlen == 0)
5969 GNUNET_asprintf (&addr_buf, "%s:%s --- %s",
5970 GNUNET_i2s (&neighbor_iterator->id),
5972 (foreign_address_iterator->connected
5973 == GNUNET_YES) ? "CONNECTED"
5975 transmit_address_to_client (tc, addr_buf);
5976 GNUNET_free(addr_buf);
5979 foreign_address_iterator = foreign_address_iterator->next;
5981 ready_iterator = ready_iterator->next;
5983 neighbor_iterator = neighbor_iterator->next;
5986 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5987 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5988 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
5993 * Setup the environment for this plugin.
5996 create_environment (struct TransportPlugin *plug)
5998 plug->env.cfg = cfg;
5999 plug->env.my_identity = &my_identity;
6000 plug->env.our_hello = &our_hello;
6001 plug->env.cls = plug;
6002 plug->env.receive = &plugin_env_receive;
6003 plug->env.notify_address = &plugin_env_notify_address;
6004 plug->env.session_end = &plugin_env_session_end;
6005 plug->env.max_connections = max_connect_per_transport;
6006 plug->env.stats = stats;
6011 * Start the specified transport (load the plugin).
6014 start_transport (struct GNUNET_SERVER_Handle *server,
6017 struct TransportPlugin *plug;
6020 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6021 _("Loading `%s' transport plugin\n"), name);
6022 GNUNET_asprintf (&libname, "libgnunet_plugin_transport_%s", name);
6023 plug = GNUNET_malloc (sizeof (struct TransportPlugin));
6024 create_environment (plug);
6025 plug->short_name = GNUNET_strdup (name);
6026 plug->lib_name = libname;
6027 plug->next = plugins;
6029 plug->api = GNUNET_PLUGIN_load (libname, &plug->env);
6030 if (plug->api == NULL)
6032 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6033 _("Failed to load transport plugin for `%s'\n"), name);
6034 GNUNET_free (plug->short_name);
6035 plugins = plug->next;
6036 GNUNET_free (libname);
6043 * Called whenever a client is disconnected. Frees our
6044 * resources associated with that client.
6046 * @param cls closure
6047 * @param client identification of the client
6050 client_disconnect_notification (void *cls,
6051 struct GNUNET_SERVER_Client *client)
6053 struct TransportClient *pos;
6054 struct TransportClient *prev;
6055 struct ClientMessageQueueEntry *mqe;
6056 struct Blacklisters *bl;
6057 struct BlacklistCheck *bc;
6062 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
6063 "Client disconnected, cleaning up.\n");
6065 /* clean up blacklister */
6069 if (bl->client == client)
6074 if (bc->bl_pos == bl)
6076 bc->bl_pos = bl->next;
6079 GNUNET_CONNECTION_notify_transmit_ready_cancel (bc->th);
6082 if (bc->task == GNUNET_SCHEDULER_NO_TASK)
6083 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
6089 GNUNET_CONTAINER_DLL_remove (bl_head,
6092 GNUNET_SERVER_client_drop (bl->client);
6098 /* clean up 'normal' clients */
6101 while ((pos != NULL) && (pos->client != client))
6108 while (NULL != (mqe = pos->message_queue_head))
6110 GNUNET_CONTAINER_DLL_remove (pos->message_queue_head,
6111 pos->message_queue_tail,
6113 pos->message_count--;
6117 clients = pos->next;
6119 prev->next = pos->next;
6120 if (GNUNET_YES == pos->tcs_pending)
6125 if (pos->th != NULL)
6127 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
6130 GNUNET_break (0 == pos->message_count);
6136 * Function called when the service shuts down. Unloads our plugins
6137 * and cancels pending validations.
6139 * @param cls closure, unused
6140 * @param tc task context (unused)
6143 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6145 struct TransportPlugin *plug;
6146 struct TransportPlugin *tmp;
6147 struct OwnAddressList *al;
6148 struct CheckHelloValidatedContext *chvc;
6150 shutdown_in_progress = GNUNET_YES;
6151 while (neighbours != NULL)
6154 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6155 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&neighbours->id),
6158 disconnect_neighbour (neighbours, GNUNET_NO);
6161 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6162 "Transport service is unloading plugins...\n");
6165 while (plug != NULL)
6167 if (plug->address_update_task != GNUNET_SCHEDULER_NO_TASK)
6169 GNUNET_SCHEDULER_cancel (plug->address_update_task);
6170 plug->address_update_task = GNUNET_SCHEDULER_NO_TASK;
6172 GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
6173 GNUNET_free (plug->lib_name);
6174 GNUNET_free (plug->short_name);
6175 while (NULL != (al = plug->addresses))
6177 plug->addresses = al->next;
6184 if (my_private_key != NULL)
6185 GNUNET_CRYPTO_rsa_key_free (my_private_key);
6186 GNUNET_free_non_null (our_hello);
6188 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
6191 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6192 validation_map = NULL;
6195 if (ats_task != GNUNET_SCHEDULER_NO_TASK)
6197 GNUNET_SCHEDULER_cancel(ats_task);
6198 ats_task = GNUNET_SCHEDULER_NO_TASK;
6203 /* free 'chvc' data structure */
6204 while (NULL != (chvc = chvc_head))
6206 chvc_head = chvc->next;
6207 if (chvc->piter != NULL)
6209 GNUNET_PEERINFO_iterate_cancel (chvc->piter);
6210 GNUNET_STATISTICS_update (stats,
6211 gettext_noop ("# outstanding peerinfo iterate requests"),
6218 GNUNET_assert (chvc->ve_count == 0);
6225 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6228 if (peerinfo != NULL)
6230 GNUNET_PEERINFO_disconnect (peerinfo);
6233 if (GNUNET_SCHEDULER_NO_TASK != hello_task)
6235 GNUNET_SCHEDULER_cancel (hello_task);
6236 hello_task = GNUNET_SCHEDULER_NO_TASK;
6238 /* Can we assume those are gone by now, or do we need to clean up
6240 GNUNET_break (bl_head == NULL);
6241 GNUNET_break (bc_head == NULL);
6245 void ats_result_cb ()
6247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6248 "ATS Result callback\n");
6252 void create_ats_information ( struct ATS_peer **p,
6254 struct ATS_mechanism ** m,
6258 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6259 "ATS requires clean address information\n");
6261 struct ATS_mechanism * mechanisms;
6262 struct ATS_peer *peers;
6264 int connected_addresses = 0;
6267 struct NeighbourList *next = neighbours;
6271 int found_addresses = GNUNET_NO;
6272 struct ReadyList *r_next = next->plugins;
6273 while (r_next != NULL)
6275 struct ForeignAddressList * a_next = r_next->addresses;
6276 while (a_next != NULL)
6279 found_addresses = GNUNET_YES;
6280 a_next = a_next->next;
6282 r_next = r_next->next;
6284 if (found_addresses) c_peers++;
6289 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6290 "Found %u peers with % u transport mechanisms\n", c_peers, c_mechs);
6293 if ((c_peers == 0) && (c_mechs == 0))
6302 mechanisms = GNUNET_malloc((1+c_mechs) * sizeof (struct ATS_mechanism));
6303 peers = GNUNET_malloc((1+c_peers) * sizeof (struct ATS_peer));
6311 int found_addresses = GNUNET_NO;
6312 struct ReadyList *r_next = next->plugins;
6313 while (r_next != NULL)
6315 struct ForeignAddressList * a_next = r_next->addresses;
6316 while (a_next != NULL)
6318 if (a_next->connected == GNUNET_YES)
6319 connected_addresses ++;
6320 if (found_addresses == GNUNET_NO)
6322 peers[c_peers].peer = next->id;
6323 peers[c_peers].m_head = NULL;
6324 peers[c_peers].m_tail = NULL;
6325 peers[c_peers].f = 1.0 / c_mechs;
6328 mechanisms[c_mechs].addr = a_next;
6329 mechanisms[c_mechs].col_index = c_mechs;
6330 mechanisms[c_mechs].peer = &peers[c_peers];
6331 mechanisms[c_mechs].next = NULL;
6332 mechanisms[c_mechs].plugin = r_next->plugin;
6333 mechanisms[c_mechs].ressources = a_next->ressources;
6334 mechanisms[c_mechs].quality = a_next->quality;
6336 GNUNET_CONTAINER_DLL_insert_tail(peers[c_peers].m_head,
6337 peers[c_peers].m_tail,
6338 &mechanisms[c_mechs]);
6339 found_addresses = GNUNET_YES;
6342 a_next = a_next->next;
6344 r_next = r_next->next;
6346 if (found_addresses == GNUNET_YES)
6357 GNUNET_STATISTICS_set(stats,
6358 gettext_noop ("# connected addresses"),
6359 connected_addresses,
6364 schedule_ats (void *cls,
6365 const struct GNUNET_SCHEDULER_TaskContext *tc)
6367 struct ATS_Handle *ats = (struct ATS_Handle *) cls;
6371 ats_task = GNUNET_SCHEDULER_NO_TASK;
6372 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
6375 if (shutdown_in_progress == GNUNET_YES)
6378 struct GNUNET_TIME_Relative delta =
6379 GNUNET_TIME_absolute_get_difference (last_ats_execution, GNUNET_TIME_absolute_get());
6380 if (delta.rel_value < ats_minimum_interval.rel_value)
6383 GNUNET_log (GNUNET_ERROR_TYPE_BULK,
6384 "Minimum time between cycles not reached\n");
6390 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Running scheduled calculation\n");
6392 ats_calculate_bandwidth_distribution (ats, stats);
6393 last_ats_execution = GNUNET_TIME_absolute_get();
6395 ats_task = GNUNET_SCHEDULER_add_delayed (ats_regular_interval,
6396 &schedule_ats, ats);
6399 struct ForeignAddressList * get_preferred_ats_address (
6400 struct NeighbourList *n)
6402 // TODO get ATS prefered address
6403 return find_ready_address(n);
6407 * Initiate transport service.
6409 * @param cls closure
6410 * @param server the initialized server
6411 * @param c configuration to use
6415 struct GNUNET_SERVER_Handle *server,
6416 const struct GNUNET_CONFIGURATION_Handle *c)
6418 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
6419 {&handle_start, NULL,
6420 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
6421 {&handle_hello, NULL,
6422 GNUNET_MESSAGE_TYPE_HELLO, 0},
6423 {&handle_send, NULL,
6424 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
6425 {&handle_request_connect, NULL,
6426 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT, sizeof(struct TransportRequestConnectMessage)},
6427 {&handle_set_quota, NULL,
6428 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
6429 {&handle_address_lookup, NULL,
6430 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP,
6432 {&handle_peer_address_lookup, NULL,
6433 GNUNET_MESSAGE_TYPE_TRANSPORT_PEER_ADDRESS_LOOKUP,
6435 {&handle_address_iterate, NULL,
6436 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE,
6438 {&handle_blacklist_init, NULL,
6439 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT, sizeof (struct GNUNET_MessageHeader)},
6440 {&handle_blacklist_reply, NULL,
6441 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY, sizeof (struct BlacklistMessage)},
6447 unsigned long long tneigh;
6450 shutdown_in_progress = GNUNET_NO;
6452 stats = GNUNET_STATISTICS_create ("transport", cfg);
6453 validation_map = GNUNET_CONTAINER_multihashmap_create (64);
6454 /* parse configuration */
6456 GNUNET_CONFIGURATION_get_value_number (c,
6461 GNUNET_CONFIGURATION_get_value_filename (c,
6463 "HOSTKEY", &keyfile)))
6465 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6467 ("Transport service is lacking key configuration settings. Exiting.\n"));
6468 GNUNET_SCHEDULER_shutdown ();
6471 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6474 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6475 validation_map = NULL;
6479 max_connect_per_transport = (uint32_t) tneigh;
6480 peerinfo = GNUNET_PEERINFO_connect (cfg);
6481 if (peerinfo == NULL)
6483 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6484 _("Could not access PEERINFO service. Exiting.\n"));
6485 GNUNET_SCHEDULER_shutdown ();
6488 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6491 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6492 validation_map = NULL;
6493 GNUNET_free (keyfile);
6496 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
6497 GNUNET_free (keyfile);
6498 if (my_private_key == NULL)
6500 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6502 ("Transport service could not access hostkey. Exiting.\n"));
6503 GNUNET_SCHEDULER_shutdown ();
6506 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6509 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6510 validation_map = NULL;
6513 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
6514 GNUNET_CRYPTO_hash (&my_public_key,
6515 sizeof (my_public_key), &my_identity.hashPubKey);
6516 /* setup notification */
6517 GNUNET_SERVER_disconnect_notify (server,
6518 &client_disconnect_notification, NULL);
6519 /* load plugins... */
6522 GNUNET_CONFIGURATION_get_value_string (c,
6523 "TRANSPORT", "PLUGINS", &plugs))
6525 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6526 _("Starting transport plugins `%s'\n"), plugs);
6527 pos = strtok (plugs, " ");
6530 start_transport (server, pos);
6532 pos = strtok (NULL, " ");
6534 GNUNET_free (plugs);
6536 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
6537 &shutdown_task, NULL);
6541 /* Initializing ATS */
6544 unsigned long long value;
6549 int v_b_min = 64000;
6552 ats_minimum_interval = ATS_MIN_INTERVAL;
6553 ats_regular_interval = ATS_EXEC_INTERVAL;
6555 /* loading cost ressources */
6556 for (co=0; co<available_ressources; co++)
6558 GNUNET_asprintf(§ion,"%s_UP",ressources[co].cfg_param);
6559 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
6561 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg,
6567 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6568 "Found ressource cost: [%s] = %llu\n",
6571 ressources[co].c_max = value;
6574 GNUNET_free (section);
6575 GNUNET_asprintf(§ion,"%s_DOWN",ressources[co].cfg_param);
6576 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
6578 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg,
6584 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6585 "Found ressource cost: [%s] = %llu\n",
6588 ressources[co].c_min = value;
6591 GNUNET_free (section);
6594 ats = ats_init (D, U, R, v_b_min, v_n_min,
6595 ATS_MAX_ITERATIONS, ATS_MAX_EXEC_DURATION,
6596 create_ats_information,
6599 int log_problem = GNUNET_NO;
6600 int log_solution = GNUNET_NO;
6601 int overwrite_dump = GNUNET_NO;
6602 int minimum_peers = 0;
6603 int minimum_addresses = 0;
6605 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MLP"))
6606 log_problem = GNUNET_CONFIGURATION_get_value_yesno (cfg,
6607 "transport","DUMP_MLP");
6609 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_SOLUTION"))
6610 log_solution = GNUNET_CONFIGURATION_get_value_yesno (cfg,
6611 "transport","DUMP_SOLUTION");
6612 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
6613 overwrite_dump = GNUNET_CONFIGURATION_get_value_yesno (cfg,
6614 "transport","DUMP_OVERWRITE");
6615 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_PEERS"))
6617 GNUNET_CONFIGURATION_get_value_number(cfg,
6618 "transport","DUMP_MIN_PEERS", &value);
6619 minimum_peers = value;
6621 if (GNUNET_CONFIGURATION_have_value(cfg,
6622 "transport", "DUMP_MIN_ADDRS"))
6624 GNUNET_CONFIGURATION_get_value_number(cfg,
6625 "transport","DUMP_MIN_ADDRS", &value);
6626 minimum_addresses= value;
6628 if (GNUNET_CONFIGURATION_have_value(cfg,
6629 "transport", "DUMP_OVERWRITE"))
6631 GNUNET_CONFIGURATION_get_value_number(cfg,
6632 "transport","DUMP_OVERWRITE", &value);
6633 overwrite_dump = value;
6636 if (GNUNET_CONFIGURATION_have_value(cfg,
6637 "transport", "ATS_MIN_INTERVAL"))
6639 GNUNET_CONFIGURATION_get_value_number(cfg,
6640 "transport","ATS_MIN_INTERVAL", &value);
6641 ats_minimum_interval.rel_value = value;
6644 if (GNUNET_CONFIGURATION_have_value(cfg,
6645 "transport", "ATS_EXEC_INTERVAL"))
6647 GNUNET_CONFIGURATION_get_value_number(cfg,
6648 "transport","ATS_EXEC_INTERVAL", &value);
6649 ats_regular_interval.rel_value = value;
6651 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
6653 GNUNET_CONFIGURATION_get_value_number(cfg,
6654 "transport","ATS_MIN_INTERVAL", &value);
6655 ats_minimum_interval.rel_value = value;
6658 ats_set_logging_options (ats,
6666 ats_task = GNUNET_SCHEDULER_add_now (&schedule_ats, ats);
6672 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6673 _("Transport service ready.\n"));
6675 /* If we have a blacklist file, read from it */
6676 read_blacklist_file(cfg);
6677 /* process client requests */
6678 GNUNET_SERVER_add_handlers (server, handlers);
6683 * The main function for the transport service.
6685 * @param argc number of arguments from the command line
6686 * @param argv command line arguments
6687 * @return 0 ok, 1 on error
6690 main (int argc, char *const *argv)
6692 a2s (NULL, NULL, 0); /* make compiler happy */
6693 return (GNUNET_OK ==
6694 GNUNET_SERVICE_run (argc,
6697 GNUNET_SERVICE_OPTION_NONE,
6698 &run, NULL)) ? 0 : 1;
6701 /* end of gnunet-service-transport.c */