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 /* Always prefer inbound addresses, provided they are still live */
1938 if ((GNUNET_YES == pos->connected) && (0 == pos->addrlen))
1942 else if (GNUNET_YES == pos->connected)
1945 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1946 "Marking address `%s' as no longer connected (due to connect on other address)\n",
1947 a2s (pos->ready_list->plugin->short_name,
1951 GNUNET_break (cnt == GNUNET_YES);
1953 pos->connected = GNUNET_NO;
1954 GNUNET_STATISTICS_update (stats,
1955 gettext_noop ("# connected addresses"),
1961 fal->connected = GNUNET_YES;
1962 if (GNUNET_YES == cnt)
1964 GNUNET_STATISTICS_update (stats,
1965 gettext_noop ("# connected addresses"),
1973 * Find an address in any of the available transports for
1974 * the given neighbour that would be good for message
1975 * transmission. This is essentially the transport selection
1978 * @param neighbour for whom to select an address
1979 * @return selected address, NULL if we have none
1981 struct ForeignAddressList *
1982 find_ready_address(struct NeighbourList *neighbour)
1984 struct ReadyList *head = neighbour->plugins;
1985 struct ForeignAddressList *addresses;
1986 struct GNUNET_TIME_Absolute now = GNUNET_TIME_absolute_get ();
1987 struct ForeignAddressList *best_address;
1989 /* Hack to prefer unix domain sockets */
1990 struct ForeignAddressList *unix_address = NULL;
1992 best_address = NULL;
1993 while (head != NULL)
1995 addresses = head->addresses;
1996 while (addresses != NULL)
1998 if ( (addresses->timeout.abs_value < now.abs_value) &&
1999 (addresses->connected == GNUNET_YES) )
2002 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2003 "Marking long-time inactive connection to `%4s' as down.\n",
2004 GNUNET_i2s (&neighbour->id));
2006 GNUNET_STATISTICS_update (stats,
2007 gettext_noop ("# connected addresses"),
2010 addresses->connected = GNUNET_NO;
2012 addresses = addresses->next;
2015 addresses = head->addresses;
2016 while (addresses != NULL)
2019 if (addresses->addr != NULL)
2020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2021 "Have address `%s' for peer `%4s' (status: %d, %d, %d, %u, %llums, %u)\n",
2022 a2s (head->plugin->short_name,
2024 addresses->addrlen),
2025 GNUNET_i2s (&neighbour->id),
2026 addresses->connected,
2027 addresses->in_transmit,
2028 addresses->validated,
2029 addresses->connect_attempts,
2030 (unsigned long long) addresses->timeout.abs_value,
2031 (unsigned int) addresses->distance);
2033 if (0==strcmp(head->plugin->short_name,"unix"))
2035 if ( (unix_address == NULL) ||
2036 ( (unix_address != NULL) &&
2037 (addresses->latency.rel_value < unix_address->latency.rel_value) ) )
2038 unix_address = addresses;
2040 if ( ( (best_address == NULL) ||
2041 (addresses->connected == GNUNET_YES) ||
2042 (best_address->connected == GNUNET_NO) ) &&
2043 (addresses->in_transmit == GNUNET_NO) &&
2044 ( (best_address == NULL) ||
2045 (addresses->latency.rel_value < best_address->latency.rel_value)) )
2046 best_address = addresses;
2047 /* FIXME: also give lower-latency addresses that are not
2048 connected a chance some times... */
2049 addresses = addresses->next;
2051 if (unix_address != NULL)
2055 if (unix_address != NULL)
2057 best_address = unix_address;
2059 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2060 "Found UNIX address, forced this address\n");
2063 if (best_address != NULL)
2066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2067 "Best address found (`%s') has latency of %llu ms.\n",
2068 (best_address->addrlen > 0)
2069 ? a2s (best_address->ready_list->plugin->short_name,
2071 best_address->addrlen)
2073 best_address->latency.rel_value);
2078 GNUNET_STATISTICS_update (stats,
2079 gettext_noop ("# transmission attempts failed (no address)"),
2084 return best_address;
2092 struct GeneratorContext
2094 struct TransportPlugin *plug_pos;
2095 struct OwnAddressList *addr_pos;
2096 struct GNUNET_TIME_Absolute expiration;
2104 address_generator (void *cls, size_t max, void *buf)
2106 struct GeneratorContext *gc = cls;
2109 while ((gc->addr_pos == NULL) && (gc->plug_pos != NULL))
2111 gc->plug_pos = gc->plug_pos->next;
2112 gc->addr_pos = (gc->plug_pos != NULL) ? gc->plug_pos->addresses : NULL;
2114 if (NULL == gc->plug_pos)
2119 ret = GNUNET_HELLO_add_address (gc->plug_pos->short_name,
2122 gc->addr_pos->addrlen, buf, max);
2123 gc->addr_pos = gc->addr_pos->next;
2129 * Construct our HELLO message from all of the addresses of
2130 * all of the transports.
2133 * @param tc scheduler context
2136 refresh_hello_task (void *cls,
2137 const struct GNUNET_SCHEDULER_TaskContext *tc)
2139 struct GNUNET_HELLO_Message *hello;
2140 struct TransportClient *cpos;
2141 struct NeighbourList *npos;
2142 struct GeneratorContext gc;
2144 hello_task = GNUNET_SCHEDULER_NO_TASK;
2145 gc.plug_pos = plugins;
2146 gc.addr_pos = plugins != NULL ? plugins->addresses : NULL;
2147 gc.expiration = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
2148 hello = GNUNET_HELLO_create (&my_public_key, &address_generator, &gc);
2150 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2151 "Refreshed my `%s', new size is %d\n", "HELLO", GNUNET_HELLO_size(hello));
2153 GNUNET_STATISTICS_update (stats,
2154 gettext_noop ("# refreshed my HELLO"),
2158 while (cpos != NULL)
2160 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2161 "Transmitting my HELLO to client!\n");
2162 transmit_to_client (cpos,
2163 (const struct GNUNET_MessageHeader *) hello,
2168 GNUNET_free_non_null (our_hello);
2170 GNUNET_PEERINFO_add_peer (peerinfo, our_hello);
2171 for (npos = neighbours; npos != NULL; npos = npos->next)
2173 if (! npos->received_pong)
2176 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2177 "Transmitting updated `%s' to neighbour `%4s'\n",
2178 "HELLO", GNUNET_i2s (&npos->id));
2180 GNUNET_STATISTICS_update (stats,
2181 gettext_noop ("# transmitted my HELLO to other peers"),
2184 transmit_to_peer (NULL, NULL, 0,
2185 HELLO_ADDRESS_EXPIRATION,
2186 (const char *) our_hello,
2187 GNUNET_HELLO_size(our_hello),
2194 * Schedule task to refresh hello (unless such a
2195 * task exists already).
2200 #if DEBUG_TRANSPORT_HELLO
2201 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2202 "refresh_hello() called!\n");
2204 if (hello_task != GNUNET_SCHEDULER_NO_TASK)
2207 = GNUNET_SCHEDULER_add_now (&refresh_hello_task,
2213 * Iterator over hash map entries that NULLs the session of validation
2214 * entries that match the given session.
2216 * @param cls closure (the 'struct Session*' to match against)
2217 * @param key current key code (peer ID, not used)
2218 * @param value value in the hash map ('struct ValidationEntry*')
2219 * @return GNUNET_YES (we should continue to iterate)
2222 remove_session_validations (void *cls,
2223 const GNUNET_HashCode * key,
2226 struct Session *session = cls;
2227 struct ValidationEntry *ve = value;
2229 if (session == ve->session)
2236 * We've been disconnected from the other peer (for some
2237 * connection-oriented transport). Either quickly
2238 * re-establish the connection or signal the disconnect
2241 * Only signal CORE level disconnect if ALL addresses
2242 * for the peer are exhausted.
2244 * @param p overall plugin context
2245 * @param nl neighbour that was disconnected
2248 try_fast_reconnect (struct TransportPlugin *p,
2249 struct NeighbourList *nl)
2251 /* FIXME-MW: fast reconnect / transport switching not implemented... */
2252 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2253 "try_fast_reconnect not implemented!\n");
2254 /* Note: the idea here is to hide problems with transports (or
2255 switching between plugins) from the core to eliminate the need to
2256 re-negotiate session keys and the like; OTOH, we should tell core
2257 quickly (much faster than timeout) `if a connection was lost and
2258 could not be re-established (i.e. other peer went down or is
2259 unable / refuses to communicate);
2261 So we should consider:
2262 1) ideally: our own willingness / need to connect
2263 2) prior failures to connect to this peer (by plugin)
2264 3) ideally: reasons why other peer terminated (as far as knowable)
2266 Most importantly, it must be POSSIBLE for another peer to terminate
2267 a connection for a while (without us instantly re-establishing it).
2268 Similarly, if another peer is gone we should quickly notify CORE.
2269 OTOH, if there was a minor glitch (i.e. crash of gnunet-service-transport
2270 on the other end), we should reconnect in such a way that BOTH CORE
2271 services never even notice.
2272 Furthermore, the same mechanism (or small variation) could be used
2273 to switch to a better-performing plugin (ATS).
2275 Finally, this needs to be tested throughly... */
2278 * GNUNET_NO in the call below makes transport disconnect the peer,
2279 * even if only a single address (out of say, six) went away. This
2280 * function must be careful to ONLY disconnect if the peer is gone,
2281 * not just a specific address.
2283 * More specifically, half the places it was used had it WRONG.
2286 /* No reconnect, signal disconnect instead! */
2289 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2290 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&nl->id),
2291 "try_fast_reconnect");
2293 GNUNET_STATISTICS_update (stats,
2294 gettext_noop ("# disconnects due to try_fast_reconnect"),
2298 disconnect_neighbour (nl, GNUNET_YES);
2304 * Function that will be called whenever the plugin internally
2305 * cleans up a session pointer and hence the service needs to
2306 * discard all of those sessions as well. Plugins that do not
2307 * use sessions can simply omit calling this function and always
2308 * use NULL wherever a session pointer is needed.
2310 * @param cls closure
2311 * @param peer which peer was the session for
2312 * @param session which session is being destoyed
2315 plugin_env_session_end (void *cls,
2316 const struct GNUNET_PeerIdentity *peer,
2317 struct Session *session)
2319 struct TransportPlugin *p = cls;
2320 struct NeighbourList *nl;
2321 struct ReadyList *rl;
2322 struct ForeignAddressList *pos;
2323 struct ForeignAddressList *prev;
2326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2327 "Session ended with peer `%4s', %s\n",
2329 "plugin_env_session_end");
2331 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
2332 &remove_session_validations,
2334 nl = find_neighbour (peer);
2338 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2339 "No neighbour record found for peer `%4s'\n",
2342 return; /* was never marked as connected */
2347 if (rl->plugin == p)
2354 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2355 "Plugin was associated with peer `%4s'\n",
2358 GNUNET_STATISTICS_update (stats,
2359 gettext_noop ("# disconnects due to session end"),
2362 disconnect_neighbour (nl, GNUNET_YES);
2366 pos = rl->addresses;
2367 while ( (pos != NULL) &&
2368 (pos->session != session) )
2376 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2377 "Session was never marked as ready for peer `%4s'\n",
2381 int validations_pending = GNUNET_CONTAINER_multihashmap_contains (validation_map, &peer->hashPubKey);
2383 /* No session was marked as ready, but we have pending validations so do not disconnect from neighbour */
2384 if (validations_pending ==GNUNET_YES)
2387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2388 "Not disconnecting from peer `%4s due to pending address validations\n", GNUNET_i2s(peer));
2393 //FIXME: This conflicts with inbound tcp connections and tcp nat ... debugging in progress
2394 GNUNET_STATISTICS_update (stats,
2395 gettext_noop ("# disconnects due to unready session"),
2399 disconnect_neighbour (nl, GNUNET_YES);
2400 return; /* was never marked as connected */
2402 pos->session = NULL;
2403 pos->connected = GNUNET_NO;
2404 if (pos->addrlen != 0)
2406 if (nl->received_pong != GNUNET_NO)
2408 GNUNET_STATISTICS_update (stats,
2409 gettext_noop ("# try_fast_reconnect thanks to plugin_env_session_end"),
2412 if (GNUNET_YES == pos->connected)
2413 try_fast_reconnect (p, nl);
2417 GNUNET_STATISTICS_update (stats,
2418 gettext_noop ("# disconnects due to missing pong"),
2421 /* FIXME this is never true?! See: line 2416*/
2422 if (GNUNET_YES == pos->connected)
2423 disconnect_neighbour (nl, GNUNET_YES);
2428 GNUNET_STATISTICS_update (stats,
2429 gettext_noop ("# connected addresses"),
2433 /* was inbound connection, free 'pos' */
2435 rl->addresses = pos->next;
2437 prev->next = pos->next;
2438 if (GNUNET_SCHEDULER_NO_TASK != pos->revalidate_task)
2440 GNUNET_SCHEDULER_cancel (pos->revalidate_task);
2441 pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
2443 GNUNET_free_non_null(pos->ressources);
2444 GNUNET_free_non_null(pos->quality);
2445 ats_modify_problem_state (ats, ATS_MODIFIED);
2447 if (GNUNET_YES != pos->connected)
2449 /* nothing else to do, connection was never up... */
2455 if (nl->received_pong == GNUNET_NO)
2457 GNUNET_STATISTICS_update (stats,
2458 gettext_noop ("# disconnects due to NO pong"),
2461 disconnect_neighbour (nl, GNUNET_YES);
2462 return; /* nothing to do, never connected... */
2464 /* check if we have any validated addresses left */
2465 pos = rl->addresses;
2468 if (GNUNET_YES == pos->validated)
2470 GNUNET_STATISTICS_update (stats,
2471 gettext_noop ("# try_fast_reconnect thanks to validated_address"),
2474 try_fast_reconnect (p, nl);
2479 /* no valid addresses left, signal disconnect! */
2482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2483 "Disconnecting peer `%4s', %s\n",
2485 "plugin_env_session_end");
2487 /* FIXME: This doesn't mean there are no addresses left for this PEER,
2488 * it means there aren't any left for this PLUGIN/PEER combination! So
2489 * calling disconnect_neighbour here with GNUNET_NO forces disconnect
2490 * when it isn't necessary. Using GNUNET_YES at least checks to see
2491 * if there are any addresses that work first, so as not to overdo it.
2494 GNUNET_STATISTICS_update (stats,
2495 gettext_noop ("# disconnects due to plugin_env_session_end"),
2498 disconnect_neighbour (nl, GNUNET_YES);
2503 * Function that must be called by each plugin to notify the
2504 * transport service about the addresses under which the transport
2505 * provided by the plugin can be reached.
2507 * @param cls closure
2508 * @param add_remove GNUNET_YES to add, GNUNET_NO to remove the address
2509 * @param addr one of the addresses of the host, NULL for the last address
2510 * the specific address format depends on the transport
2511 * @param addrlen length of the address
2514 plugin_env_notify_address (void *cls,
2519 struct TransportPlugin *p = cls;
2520 struct OwnAddressList *al;
2521 struct OwnAddressList *prev;
2523 GNUNET_assert (p->api != NULL);
2525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2526 (add_remove == GNUNET_YES)
2527 ? "Adding `%s':%s to the set of our addresses\n"
2528 : "Removing `%s':%s from the set of our addresses\n",
2533 GNUNET_assert (addr != NULL);
2534 if (GNUNET_NO == add_remove)
2540 if ( (addrlen == al->addrlen) &&
2541 (0 == memcmp (addr, &al[1], addrlen)) )
2544 p->addresses = al->next;
2546 prev->next = al->next;
2557 al = GNUNET_malloc (sizeof (struct OwnAddressList) + addrlen);
2558 al->next = p->addresses;
2560 al->addrlen = addrlen;
2561 memcpy (&al[1], addr, addrlen);
2567 * Notify all of our clients about a peer connecting.
2570 notify_clients_connect (const struct GNUNET_PeerIdentity *peer,
2571 struct GNUNET_TIME_Relative latency,
2574 struct ConnectInfoMessage * cim;
2575 struct TransportClient *cpos;
2579 if (0 == memcmp (peer,
2581 sizeof (struct GNUNET_PeerIdentity)))
2587 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2588 "Notifying clients about connection with `%s'\n",
2591 GNUNET_STATISTICS_update (stats,
2592 gettext_noop ("# peers connected"),
2597 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
2598 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
2602 cim = GNUNET_malloc (size);
2603 cim->header.size = htons (size);
2604 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
2605 cim->ats_count = htonl(2);
2606 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
2607 (&(cim->ats))[0].value = htonl (distance);
2608 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
2609 (&(cim->ats))[1].value = htonl ((uint32_t) latency.rel_value);
2610 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
2611 (&(cim->ats))[2].value = htonl (0);
2612 memcpy (&cim->id, peer, sizeof (struct GNUNET_PeerIdentity));
2614 /* notify ats about connecting peer */
2615 /* notify ats about connecting peer */
2616 if ((ats != NULL) && (shutdown_in_progress == GNUNET_NO))
2618 ats_modify_problem_state(ats, ATS_MODIFIED);
2619 ats_calculate_bandwidth_distribution (ats, stats);
2624 while (cpos != NULL)
2626 transmit_to_client (cpos, &(cim->header), GNUNET_NO);
2635 * Notify all of our clients about a peer disconnecting.
2638 notify_clients_disconnect (const struct GNUNET_PeerIdentity *peer)
2640 struct DisconnectInfoMessage dim;
2641 struct TransportClient *cpos;
2643 if (0 == memcmp (peer,
2645 sizeof (struct GNUNET_PeerIdentity)))
2651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2652 "Notifying clients about lost connection to `%s'\n",
2655 GNUNET_STATISTICS_update (stats,
2656 gettext_noop ("# peers connected"),
2659 dim.header.size = htons (sizeof (struct DisconnectInfoMessage));
2660 dim.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DISCONNECT);
2661 dim.reserved = htonl (0);
2662 memcpy (&dim.peer, peer, sizeof (struct GNUNET_PeerIdentity));
2664 /* notify ats about connecting peer */
2665 if ((ats != NULL) && (shutdown_in_progress == GNUNET_NO))
2667 ats_modify_problem_state(ats, ATS_MODIFIED);
2668 ats_calculate_bandwidth_distribution (ats, stats);
2672 while (cpos != NULL)
2674 transmit_to_client (cpos, &dim.header, GNUNET_NO);
2681 * Find a ForeignAddressList entry for the given neighbour
2682 * that matches the given address and transport.
2684 * @param neighbour which peer we care about
2685 * @param tname name of the transport plugin
2686 * @param session session to look for, NULL for 'any'; otherwise
2687 * can be used for the service to "learn" this session ID
2689 * @param addr binary address
2690 * @param addrlen length of addr
2691 * @return NULL if no such entry exists
2693 static struct ForeignAddressList *
2694 find_peer_address(struct NeighbourList *neighbour,
2696 struct Session *session,
2700 struct ReadyList *head;
2701 struct ForeignAddressList *pos;
2703 head = neighbour->plugins;
2704 while (head != NULL)
2706 if (0 == strcmp (tname, head->plugin->short_name))
2712 pos = head->addresses;
2713 while ( (pos != NULL) &&
2714 ( (pos->addrlen != addrlen) ||
2715 (memcmp(pos->addr, addr, addrlen) != 0) ) )
2717 if ( (session != NULL) &&
2718 (pos->session == session) )
2722 if ( (session != NULL) && (pos != NULL) )
2723 pos->session = session; /* learn it! */
2729 * Get the peer address struct for the given neighbour and
2730 * address. If it doesn't yet exist, create it.
2732 * @param neighbour which peer we care about
2733 * @param tname name of the transport plugin
2734 * @param session session of the plugin, or NULL for none
2735 * @param addr binary address
2736 * @param addrlen length of addr
2737 * @return NULL if we do not have a transport plugin for 'tname'
2739 static struct ForeignAddressList *
2740 add_peer_address (struct NeighbourList *neighbour,
2742 struct Session *session,
2746 struct ReadyList *head;
2747 struct ForeignAddressList *ret;
2750 ret = find_peer_address (neighbour, tname, session, addr, addrlen);
2753 head = neighbour->plugins;
2755 while (head != NULL)
2757 if (0 == strcmp (tname, head->plugin->short_name))
2763 ret = GNUNET_malloc(sizeof(struct ForeignAddressList) + addrlen);
2764 ret->session = session;
2765 if ((addrlen > 0) && (addr != NULL))
2767 ret->addr = (const char*) &ret[1];
2768 memcpy (&ret[1], addr, addrlen);
2775 ret->ressources = GNUNET_malloc(available_ressources * sizeof (struct ATS_ressource_entry));
2776 for (c=0; c<available_ressources; c++)
2778 struct ATS_ressource_entry *r = ret->ressources;
2780 r[c].atis_index = ressources[c].atis_index;
2781 if (0 == strcmp(neighbour->plugins->plugin->short_name,"unix"))
2783 r[c].c = ressources[c].c_unix;
2785 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"udp"))
2787 r[c].c = ressources[c].c_udp;
2789 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"tcp"))
2791 r[c].c = ressources[c].c_tcp;
2793 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"http"))
2795 r[c].c = ressources[c].c_http;
2797 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"https"))
2799 r[c].c = ressources[c].c_https;
2801 else if (0 == strcmp(neighbour->plugins->plugin->short_name,"wlan"))
2803 r[c].c = ressources[c].c_wlan;
2807 r[c].c = ressources[c].c_default;
2808 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2809 "Assigning default cost to peer `%s' addr plugin `%s'! This should not happen!\n",
2810 GNUNET_i2s(&neighbour->id),
2811 neighbour->plugins->plugin->short_name);
2815 ret->quality = GNUNET_malloc (available_quality_metrics * sizeof (struct ATS_quality_entry));
2816 ret->addrlen = addrlen;
2817 ret->expires = GNUNET_TIME_relative_to_absolute
2818 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2819 ret->latency = GNUNET_TIME_relative_get_forever();
2821 ret->timeout = GNUNET_TIME_relative_to_absolute
2822 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
2823 ret->ready_list = head;
2824 ret->next = head->addresses;
2825 head->addresses = ret;
2831 * Closure for 'add_validated_address'.
2833 struct AddValidatedAddressContext
2836 * Entry that has been validated.
2838 const struct ValidationEntry *ve;
2841 * Flag set after we have added the address so
2842 * that we terminate the iteration next time.
2849 * Callback function used to fill a buffer of max bytes with a list of
2850 * addresses in the format used by HELLOs. Should use
2851 * "GNUNET_HELLO_add_address" as a helper function.
2853 * @param cls the 'struct AddValidatedAddressContext' with the validated address
2854 * @param max maximum number of bytes that can be written to buf
2855 * @param buf where to write the address information
2856 * @return number of bytes written, 0 to signal the
2857 * end of the iteration.
2860 add_validated_address (void *cls,
2861 size_t max, void *buf)
2863 struct AddValidatedAddressContext *avac = cls;
2864 const struct ValidationEntry *ve = avac->ve;
2866 if (GNUNET_YES == avac->done)
2868 avac->done = GNUNET_YES;
2869 return GNUNET_HELLO_add_address (ve->transport_name,
2870 GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION),
2880 * Closure for 'check_address_exists'.
2882 struct CheckAddressExistsClosure
2885 * Address to check for.
2890 * Name of the transport.
2897 struct Session *session;
2900 * Set to GNUNET_YES if the address exists.
2913 * Iterator over hash map entries. Checks if the given
2914 * validation entry is for the same address as what is given
2917 * @param cls the 'struct CheckAddressExistsClosure*'
2918 * @param key current key code (ignored)
2919 * @param value value in the hash map ('struct ValidationEntry')
2920 * @return GNUNET_YES if we should continue to
2921 * iterate (mismatch), GNUNET_NO if not (entry matched)
2924 check_address_exists (void *cls,
2925 const GNUNET_HashCode * key,
2928 struct CheckAddressExistsClosure *caec = cls;
2929 struct ValidationEntry *ve = value;
2931 if ( (0 == strcmp (caec->tname,
2932 ve->transport_name)) &&
2933 (caec->addrlen == ve->addrlen) &&
2934 (0 == memcmp (caec->addr,
2938 caec->exists = GNUNET_YES;
2941 if ( (ve->session != NULL) &&
2942 (caec->session == ve->session) )
2944 caec->exists = GNUNET_YES;
2952 neighbour_timeout_task (void *cls,
2953 const struct GNUNET_SCHEDULER_TaskContext *tc)
2955 struct NeighbourList *n = cls;
2958 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
2959 "Neighbour `%4s' has timed out!\n", GNUNET_i2s (&n->id));
2961 GNUNET_STATISTICS_update (stats,
2962 gettext_noop ("# disconnects due to timeout"),
2965 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2966 disconnect_neighbour (n, GNUNET_NO);
2971 * Schedule the job that will cause us to send a PING to the
2972 * foreign address to evaluate its validity and latency.
2974 * @param fal address to PING
2977 schedule_next_ping (struct ForeignAddressList *fal);
2981 * Add the given address to the list of foreign addresses
2982 * available for the given peer (check for duplicates).
2984 * @param cls the respective 'struct NeighbourList' to update
2985 * @param tname name of the transport
2986 * @param expiration expiration time
2987 * @param addr the address
2988 * @param addrlen length of the address
2989 * @return GNUNET_OK (always)
2992 add_to_foreign_address_list (void *cls,
2994 struct GNUNET_TIME_Absolute expiration,
2998 struct NeighbourList *n = cls;
2999 struct ForeignAddressList *fal;
3002 GNUNET_STATISTICS_update (stats,
3003 gettext_noop ("# valid peer addresses returned by PEERINFO"),
3007 fal = find_peer_address (n, tname, NULL, addr, addrlen);
3010 #if DEBUG_TRANSPORT_HELLO
3011 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3012 "Adding address `%s' (%s) for peer `%4s' due to PEERINFO data for %llums.\n",
3013 a2s (tname, addr, addrlen),
3015 GNUNET_i2s (&n->id),
3016 expiration.abs_value);
3018 fal = add_peer_address (n, tname, NULL, addr, addrlen);
3021 GNUNET_STATISTICS_update (stats,
3022 gettext_noop ("# previously validated addresses lacking transport"),
3028 fal->expires = GNUNET_TIME_absolute_max (expiration,
3030 schedule_next_ping (fal);
3036 fal->expires = GNUNET_TIME_absolute_max (expiration,
3042 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3043 "Failed to add new address for `%4s'\n",
3044 GNUNET_i2s (&n->id));
3048 if (fal->validated == GNUNET_NO)
3050 fal->validated = GNUNET_YES;
3051 GNUNET_STATISTICS_update (stats,
3052 gettext_noop ("# peer addresses considered valid"),
3056 if (try == GNUNET_YES)
3059 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3060 "Have new addresses, will try to trigger transmissions.\n");
3062 try_transmission_to_peer (n);
3069 * Add addresses in validated HELLO "h" to the set of addresses
3070 * we have for this peer.
3072 * @param cls closure ('struct NeighbourList*')
3073 * @param peer id of the peer, NULL for last call
3074 * @param h hello message for the peer (can be NULL)
3075 * @param err_msg NULL if successful, otherwise contains error message
3078 add_hello_for_peer (void *cls,
3079 const struct GNUNET_PeerIdentity *peer,
3080 const struct GNUNET_HELLO_Message *h,
3081 const char *err_msg)
3083 struct NeighbourList *n = cls;
3085 if (err_msg != NULL)
3088 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3089 _("Error in communication with PEERINFO service: %s\n"),
3096 GNUNET_STATISTICS_update (stats,
3097 gettext_noop ("# outstanding peerinfo iterate requests"),
3104 return; /* no HELLO available */
3106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3107 "Peerinfo had `%s' message for peer `%4s', adding existing addresses.\n",
3111 if (GNUNET_YES != n->public_key_valid)
3113 GNUNET_HELLO_get_key (h, &n->publicKey);
3114 n->public_key_valid = GNUNET_YES;
3116 GNUNET_HELLO_iterate_addresses (h,
3118 &add_to_foreign_address_list,
3124 * Create a fresh entry in our neighbour list for the given peer.
3125 * Will try to transmit our current HELLO to the new neighbour.
3126 * Do not call this function directly, use 'setup_peer_check_blacklist.
3128 * @param peer the peer for which we create the entry
3129 * @param do_hello should we schedule transmitting a HELLO
3130 * @return the new neighbour list entry
3132 static struct NeighbourList *
3133 setup_new_neighbour (const struct GNUNET_PeerIdentity *peer,
3136 struct NeighbourList *n;
3137 struct TransportPlugin *tp;
3138 struct ReadyList *rl;
3140 GNUNET_assert (0 != memcmp (peer,
3142 sizeof (struct GNUNET_PeerIdentity)));
3144 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3145 "Setting up state for neighbour `%4s'\n",
3148 GNUNET_STATISTICS_update (stats,
3149 gettext_noop ("# active neighbours"),
3152 n = GNUNET_malloc (sizeof (struct NeighbourList));
3153 n->next = neighbours;
3157 GNUNET_TIME_relative_to_absolute
3158 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
3159 GNUNET_BANDWIDTH_tracker_init (&n->in_tracker,
3160 GNUNET_CONSTANTS_DEFAULT_BW_IN_OUT,
3161 MAX_BANDWIDTH_CARRY_S);
3165 if ((tp->api->send != NULL) && (!is_blacklisted(peer, tp)))
3167 rl = GNUNET_malloc (sizeof (struct ReadyList));
3169 rl->next = n->plugins;
3172 rl->addresses = NULL;
3176 n->latency = GNUNET_TIME_UNIT_FOREVER_REL;
3178 n->timeout_task = GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
3179 &neighbour_timeout_task, n);
3182 GNUNET_STATISTICS_update (stats,
3183 gettext_noop ("# peerinfo new neighbor iterate requests"),
3186 GNUNET_STATISTICS_update (stats,
3187 gettext_noop ("# outstanding peerinfo iterate requests"),
3190 n->piter = GNUNET_PEERINFO_iterate (peerinfo, peer,
3191 GNUNET_TIME_UNIT_FOREVER_REL,
3192 &add_hello_for_peer, n);
3194 GNUNET_STATISTICS_update (stats,
3195 gettext_noop ("# HELLO's sent to new neighbors"),
3198 if (NULL != our_hello)
3199 transmit_to_peer (NULL, NULL, 0,
3200 HELLO_ADDRESS_EXPIRATION,
3201 (const char *) our_hello, GNUNET_HELLO_size(our_hello),
3209 * Function called after we have checked if communicating
3210 * with a given peer is acceptable.
3212 * @param cls closure
3213 * @param n NULL if communication is not acceptable
3215 typedef void (*SetupContinuation)(void *cls,
3216 struct NeighbourList *n);
3220 * Information kept for each client registered to perform
3226 * This is a linked list.
3228 struct Blacklisters *next;
3231 * This is a linked list.
3233 struct Blacklisters *prev;
3236 * Client responsible for this entry.
3238 struct GNUNET_SERVER_Client *client;
3241 * Blacklist check that we're currently performing.
3243 struct BlacklistCheck *bc;
3249 * Head of DLL of blacklisting clients.
3251 static struct Blacklisters *bl_head;
3254 * Tail of DLL of blacklisting clients.
3256 static struct Blacklisters *bl_tail;
3260 * Context we use when performing a blacklist check.
3262 struct BlacklistCheck
3266 * This is a linked list.
3268 struct BlacklistCheck *next;
3271 * This is a linked list.
3273 struct BlacklistCheck *prev;
3276 * Peer being checked.
3278 struct GNUNET_PeerIdentity peer;
3281 * Option for setup neighbour afterwards.
3286 * Continuation to call with the result.
3288 SetupContinuation cont;
3296 * Current transmission request handle for this client, or NULL if no
3297 * request is pending.
3299 struct GNUNET_CONNECTION_TransmitHandle *th;
3302 * Our current position in the blacklisters list.
3304 struct Blacklisters *bl_pos;
3307 * Current task performing the check.
3309 GNUNET_SCHEDULER_TaskIdentifier task;
3314 * Head of DLL of active blacklisting queries.
3316 static struct BlacklistCheck *bc_head;
3319 * Tail of DLL of active blacklisting queries.
3321 static struct BlacklistCheck *bc_tail;
3325 * Perform next action in the blacklist check.
3327 * @param cls the 'struct BlacklistCheck*'
3331 do_blacklist_check (void *cls,
3332 const struct GNUNET_SCHEDULER_TaskContext *tc);
3335 * Transmit blacklist query to the client.
3337 * @param cls the 'struct BlacklistCheck'
3338 * @param size number of bytes allowed
3339 * @param buf where to copy the message
3340 * @return number of bytes copied to buf
3343 transmit_blacklist_message (void *cls,
3347 struct BlacklistCheck *bc = cls;
3348 struct Blacklisters *bl;
3349 struct BlacklistMessage bm;
3354 GNUNET_assert (bc->task == GNUNET_SCHEDULER_NO_TASK);
3355 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3357 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3358 "Failed to send blacklist test for peer `%s' to client\n",
3359 GNUNET_i2s (&bc->peer));
3363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3364 "Sending blacklist test for peer `%s' to client\n",
3365 GNUNET_i2s (&bc->peer));
3368 bm.header.size = htons (sizeof (struct BlacklistMessage));
3369 bm.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_QUERY);
3370 bm.is_allowed = htonl (0);
3372 memcpy (buf, &bm, sizeof (bm));
3373 GNUNET_SERVER_receive_done (bl->client, GNUNET_OK);
3379 * Perform next action in the blacklist check.
3381 * @param cls the 'struct BlacklistCheck*'
3385 do_blacklist_check (void *cls,
3386 const struct GNUNET_SCHEDULER_TaskContext *tc)
3388 struct BlacklistCheck *bc = cls;
3389 struct Blacklisters *bl;
3391 bc->task = GNUNET_SCHEDULER_NO_TASK;
3396 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3397 "No blacklist clients active, will now setup neighbour record for peer `%s'\n",
3398 GNUNET_i2s (&bc->peer));
3400 bc->cont (bc->cont_cls,
3401 setup_new_neighbour (&bc->peer, bc->do_hello));
3408 bc->th = GNUNET_SERVER_notify_transmit_ready (bl->client,
3409 sizeof (struct BlacklistMessage),
3410 GNUNET_TIME_UNIT_FOREVER_REL,
3411 &transmit_blacklist_message,
3418 * Obtain a 'struct NeighbourList' for the given peer. If such an entry
3419 * does not yet exist, check the blacklist. If the blacklist says creating
3420 * one is acceptable, create one and call the continuation; otherwise
3421 * call the continuation with NULL.
3423 * @param peer peer to setup or look up a struct NeighbourList for
3424 * @param do_hello should we also schedule sending our HELLO to the peer
3425 * if this is a new record
3426 * @param cont function to call with the 'struct NeigbhbourList*'
3427 * @param cont_cls closure for cont
3430 setup_peer_check_blacklist (const struct GNUNET_PeerIdentity *peer,
3432 SetupContinuation cont,
3435 struct NeighbourList *n;
3436 struct BlacklistCheck *bc;
3438 n = find_neighbour(peer);
3442 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3443 "Neighbour record exists for peer `%s'\n",
3450 if (bl_head == NULL)
3453 cont (cont_cls, setup_new_neighbour (peer, do_hello));
3455 setup_new_neighbour(peer, do_hello);
3458 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3459 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3461 bc->do_hello = do_hello;
3463 bc->cont_cls = cont_cls;
3464 bc->bl_pos = bl_head;
3465 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3471 * Function called with the result of querying a new blacklister about
3472 * it being allowed (or not) to continue to talk to an existing neighbour.
3474 * @param cls the original 'struct NeighbourList'
3475 * @param n NULL if we need to disconnect
3478 confirm_or_drop_neighbour (void *cls,
3479 struct NeighbourList *n)
3481 struct NeighbourList * orig = cls;
3486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3487 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&orig->id),
3488 "confirm_or_drop_neighboUr");
3490 GNUNET_STATISTICS_update (stats,
3491 gettext_noop ("# disconnects due to blacklist"),
3494 disconnect_neighbour (orig, GNUNET_NO);
3500 * Handle a request to start a blacklist.
3502 * @param cls closure (always NULL)
3503 * @param client identification of the client
3504 * @param message the actual message
3507 handle_blacklist_init (void *cls,
3508 struct GNUNET_SERVER_Client *client,
3509 const struct GNUNET_MessageHeader *message)
3511 struct Blacklisters *bl;
3512 struct BlacklistCheck *bc;
3513 struct NeighbourList *n;
3518 if (bl->client == client)
3521 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3526 bl = GNUNET_malloc (sizeof (struct Blacklisters));
3527 bl->client = client;
3528 GNUNET_SERVER_client_keep (client);
3529 GNUNET_CONTAINER_DLL_insert_after (bl_head, bl_tail, bl_tail, bl);
3530 /* confirm that all existing connections are OK! */
3534 bc = GNUNET_malloc (sizeof (struct BlacklistCheck));
3535 GNUNET_CONTAINER_DLL_insert (bc_head, bc_tail, bc);
3537 bc->do_hello = GNUNET_NO;
3538 bc->cont = &confirm_or_drop_neighbour;
3541 if (n == neighbours) /* all would wait for the same client, no need to
3542 create more than just the first task right now */
3543 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3551 * Handle a request to blacklist a peer.
3553 * @param cls closure (always NULL)
3554 * @param client identification of the client
3555 * @param message the actual message
3558 handle_blacklist_reply (void *cls,
3559 struct GNUNET_SERVER_Client *client,
3560 const struct GNUNET_MessageHeader *message)
3562 const struct BlacklistMessage *msg = (const struct BlacklistMessage*) message;
3563 struct Blacklisters *bl;
3564 struct BlacklistCheck *bc;
3567 while ( (bl != NULL) &&
3568 (bl->client != client) )
3573 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3574 "Blacklist client disconnected\n");
3576 /* FIXME: other error handling here!? */
3577 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3582 if (ntohl (msg->is_allowed) == GNUNET_SYSERR)
3585 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3586 "Blacklist check failed, peer not allowed\n");
3588 bc->cont (bc->cont_cls, NULL);
3589 GNUNET_CONTAINER_DLL_remove (bc_head, bc_tail, bc);
3595 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3596 "Blacklist check succeeded, continuing with checks\n");
3598 bc->bl_pos = bc->bl_pos->next;
3599 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3602 /* check if any other bc's are waiting for this blacklister */
3606 if ( (bc->bl_pos == bl) &&
3607 (GNUNET_SCHEDULER_NO_TASK == bc->task) )
3608 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
3616 * Send periodic PING messages to a given foreign address.
3618 * @param cls our 'struct PeriodicValidationContext*'
3619 * @param tc task context
3622 send_periodic_ping (void *cls,
3623 const struct GNUNET_SCHEDULER_TaskContext *tc)
3625 struct ForeignAddressList *peer_address = cls;
3626 struct TransportPlugin *tp;
3627 struct ValidationEntry *va;
3628 struct NeighbourList *neighbour;
3629 struct TransportPingMessage ping;
3630 struct CheckAddressExistsClosure caec;
3632 uint16_t hello_size;
3636 peer_address->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
3637 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
3639 tp = peer_address->ready_list->plugin;
3640 neighbour = peer_address->ready_list->neighbour;
3641 if (GNUNET_YES != neighbour->public_key_valid)
3643 /* no public key yet, try again later */
3644 schedule_next_ping (peer_address);
3647 caec.addr = peer_address->addr;
3648 caec.addrlen = peer_address->addrlen;
3649 caec.tname = tp->short_name;
3650 caec.session = peer_address->session;
3651 caec.exists = GNUNET_NO;
3652 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
3653 &check_address_exists,
3655 if (caec.exists == GNUNET_YES)
3657 /* During validation attempts we will likely trigger the other
3658 peer trying to validate our address which in turn will cause
3659 it to send us its HELLO, so we expect to hit this case rather
3660 frequently. Only print something if we are very verbose. */
3661 #if DEBUG_TRANSPORT > 1
3662 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3663 "Some validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
3664 (peer_address->addr != NULL)
3665 ? a2s (tp->short_name,
3667 peer_address->addrlen)
3670 GNUNET_i2s (&neighbour->id));
3672 schedule_next_ping (peer_address);
3675 va = GNUNET_malloc (sizeof (struct ValidationEntry) + peer_address->addrlen);
3676 va->transport_name = GNUNET_strdup (tp->short_name);
3677 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
3679 va->send_time = GNUNET_TIME_absolute_get();
3680 va->session = peer_address->session;
3681 if (peer_address->addr != NULL)
3683 va->addr = (const void*) &va[1];
3684 memcpy (&va[1], peer_address->addr, peer_address->addrlen);
3685 va->addrlen = peer_address->addrlen;
3687 memcpy(&va->publicKey,
3688 &neighbour->publicKey,
3689 sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
3691 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
3692 &timeout_hello_validation,
3694 GNUNET_CONTAINER_multihashmap_put (validation_map,
3695 &neighbour->id.hashPubKey,
3697 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3699 if (peer_address->validated != GNUNET_YES)
3700 hello_size = GNUNET_HELLO_size(our_hello);
3704 tsize = sizeof(struct TransportPingMessage) + hello_size;
3706 if (peer_address->addr != NULL)
3708 slen = strlen (tp->short_name) + 1;
3709 tsize += slen + peer_address->addrlen;
3713 slen = 0; /* make gcc happy */
3715 message_buf = GNUNET_malloc(tsize);
3716 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
3717 ping.challenge = htonl(va->challenge);
3718 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
3719 if (peer_address->validated != GNUNET_YES)
3721 memcpy(message_buf, our_hello, hello_size);
3724 if (peer_address->addr != NULL)
3726 ping.header.size = htons(sizeof(struct TransportPingMessage) +
3727 peer_address->addrlen +
3729 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
3732 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
3734 peer_address->addrlen);
3738 ping.header.size = htons(sizeof(struct TransportPingMessage));
3741 memcpy(&message_buf[hello_size],
3743 sizeof(struct TransportPingMessage));
3745 #if DEBUG_TRANSPORT_REVALIDATION
3746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3747 "Performing re-validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s'\n",
3748 (peer_address->addr != NULL)
3749 ? a2s (peer_address->plugin->short_name,
3751 peer_address->addrlen)
3754 GNUNET_i2s (&neighbour->id),
3755 "HELLO", hello_size,
3758 if (peer_address->validated != GNUNET_YES)
3759 GNUNET_STATISTICS_update (stats,
3760 gettext_noop ("# PING with HELLO messages sent"),
3764 GNUNET_STATISTICS_update (stats,
3765 gettext_noop ("# PING without HELLO messages sent"),
3768 GNUNET_STATISTICS_update (stats,
3769 gettext_noop ("# PING messages sent for re-validation"),
3772 transmit_to_peer (NULL, peer_address,
3773 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
3774 HELLO_VERIFICATION_TIMEOUT,
3776 GNUNET_YES, neighbour);
3777 GNUNET_free(message_buf);
3778 schedule_next_ping (peer_address);
3783 * Schedule the job that will cause us to send a PING to the
3784 * foreign address to evaluate its validity and latency.
3786 * @param fal address to PING
3789 schedule_next_ping (struct ForeignAddressList *fal)
3791 struct GNUNET_TIME_Relative delay;
3793 if (fal->revalidate_task != GNUNET_SCHEDULER_NO_TASK)
3795 GNUNET_SCHEDULER_cancel(fal->revalidate_task);
3796 fal->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
3798 delay = GNUNET_TIME_absolute_get_remaining (fal->expires);
3799 delay.rel_value /= 2; /* do before expiration */
3800 delay = GNUNET_TIME_relative_min (delay,
3801 LATENCY_EVALUATION_MAX_DELAY);
3802 if (GNUNET_YES != fal->estimated)
3804 delay = GNUNET_TIME_UNIT_ZERO;
3805 fal->estimated = GNUNET_YES;
3808 if (GNUNET_YES == fal->connected)
3810 delay = GNUNET_TIME_relative_min (delay,
3811 CONNECTED_LATENCY_EVALUATION_MAX_DELAY);
3813 /* FIXME: also adjust delay based on how close the last
3814 observed latency is to the latency of the best alternative */
3815 /* bound how fast we can go */
3816 delay = GNUNET_TIME_relative_max (delay,
3817 GNUNET_TIME_UNIT_SECONDS);
3818 /* randomize a bit (to avoid doing all at the same time) */
3819 delay.rel_value += GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 1000);
3820 fal->revalidate_task = GNUNET_SCHEDULER_add_delayed(delay,
3821 &send_periodic_ping,
3829 * Function that will be called if we receive some payload
3830 * from another peer.
3832 * @param message the payload
3833 * @param n peer who claimed to be the sender
3836 handle_payload_message (const struct GNUNET_MessageHeader *message,
3837 struct NeighbourList *n)
3839 struct InboundMessage *im;
3840 struct TransportClient *cpos;
3843 msize = ntohs (message->size);
3844 if (n->received_pong == GNUNET_NO)
3847 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3848 "Received message of type %u and size %u from `%4s', but no pong yet!\n",
3849 ntohs (message->type),
3850 ntohs (message->size),
3851 GNUNET_i2s (&n->id));
3853 GNUNET_free_non_null (n->pre_connect_message_buffer);
3854 n->pre_connect_message_buffer = GNUNET_malloc (msize);
3855 memcpy (n->pre_connect_message_buffer, message, msize);
3860 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3861 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
3862 ntohs (message->type),
3863 ntohs (message->size),
3864 GNUNET_i2s (&n->id));
3866 if (GNUNET_YES == GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3869 n->quota_violation_count++;
3871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3872 "Bandwidth quota (%u b/s) violation detected (total of %u).\n",
3873 n->in_tracker.available_bytes_per_s__,
3874 n->quota_violation_count);
3876 /* Discount 32k per violation */
3877 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3882 if (n->quota_violation_count > 0)
3884 /* try to add 32k back */
3885 GNUNET_BANDWIDTH_tracker_consume (&n->in_tracker,
3887 n->quota_violation_count--;
3890 GNUNET_STATISTICS_update (stats,
3891 gettext_noop ("# payload received from other peers"),
3894 /* transmit message to all clients */
3895 uint32_t ats_count = 2;
3896 size_t size = sizeof (struct InboundMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information) + msize;
3897 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
3900 im = GNUNET_malloc (size);
3901 im->header.size = htons (size);
3902 im->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_RECV);
3904 im->ats_count = htonl(ats_count);
3905 /* Setting ATS data */
3906 (&(im->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
3907 (&(im->ats))[0].value = htonl (n->distance);
3908 (&(im->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
3909 (&(im->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
3910 (&(im->ats))[ats_count].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
3911 (&(im->ats))[ats_count].value = htonl (0);
3913 memcpy (&((&(im->ats))[ats_count+1]), message, msize);
3915 while (cpos != NULL)
3917 transmit_to_client (cpos, &im->header, GNUNET_YES);
3925 * Iterator over hash map entries. Checks if the given validation
3926 * entry is for the same challenge as what is given in the PONG.
3928 * @param cls the 'struct TransportPongMessage*'
3929 * @param key peer identity
3930 * @param value value in the hash map ('struct ValidationEntry')
3931 * @return GNUNET_YES if we should continue to
3932 * iterate (mismatch), GNUNET_NO if not (entry matched)
3935 check_pending_validation (void *cls,
3936 const GNUNET_HashCode * key,
3939 const struct TransportPongMessage *pong = cls;
3940 struct ValidationEntry *ve = value;
3941 struct AddValidatedAddressContext avac;
3942 unsigned int challenge = ntohl(pong->challenge);
3943 struct GNUNET_HELLO_Message *hello;
3944 struct GNUNET_PeerIdentity target;
3945 struct NeighbourList *n;
3946 struct ForeignAddressList *fal;
3947 struct OwnAddressList *oal;
3948 struct TransportPlugin *tp;
3949 struct GNUNET_MessageHeader *prem;
3955 ps = ntohs (pong->header.size);
3956 if (ps < sizeof (struct TransportPongMessage))
3958 GNUNET_break_op (0);
3961 addr = (const char*) &pong[1];
3962 slen = strlen (ve->transport_name) + 1;
3963 if ( (ps - sizeof (struct TransportPongMessage) < slen) ||
3964 (ve->challenge != challenge) ||
3965 (addr[slen-1] != '\0') ||
3966 (0 != strcmp (addr, ve->transport_name)) ||
3967 (ntohl (pong->purpose.size)
3968 != sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
3970 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
3971 sizeof (struct GNUNET_PeerIdentity) + ps - sizeof (struct TransportPongMessage)) )
3976 alen = ps - sizeof (struct TransportPongMessage) - slen;
3977 switch (ntohl (pong->purpose.purpose))
3979 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN:
3980 if ( (ve->addrlen + slen != ntohl (pong->addrlen)) ||
3981 (0 != memcmp (&addr[slen],
3985 return GNUNET_YES; /* different entry, keep trying! */
3987 if (0 != memcmp (&pong->pid,
3989 sizeof (struct GNUNET_PeerIdentity)))
3991 GNUNET_break_op (0);
3995 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN,
4000 GNUNET_break_op (0);
4005 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4006 "Confirmed validity of address, peer `%4s' has address `%s' (%s).\n",
4008 a2s (ve->transport_name,
4009 (const struct sockaddr *) ve->addr,
4011 ve->transport_name);
4014 case GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING:
4015 if (0 != memcmp (&pong->pid,
4017 sizeof (struct GNUNET_PeerIdentity)))
4021 GNUNET_asprintf(&peer, "%s",GNUNET_i2s (&pong->pid));
4023 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4024 "Received PONG for different identity: I am `%s', PONG identity: `%s'\n",
4025 GNUNET_i2s (&my_identity),
4031 if (ve->addrlen != 0)
4033 /* must have been for a different validation entry */
4036 tp = find_transport (ve->transport_name);
4042 oal = tp->addresses;
4045 if ( (oal->addrlen == alen) &&
4046 (0 == memcmp (&oal[1],
4054 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4055 _("Not accepting PONG from `%s' with address `%s' since I cannot confirm using this address.\n"),
4056 GNUNET_i2s (&pong->pid),
4057 a2s (ve->transport_name,
4060 /* FIXME: since the sender of the PONG currently uses the
4061 wrong address (see FIMXE there!), we cannot run a
4062 proper check here... */
4068 GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING,
4073 GNUNET_break_op (0);
4078 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4079 "Confirmed that peer `%4s' is talking to us using address `%s' (%s) for us.\n",
4081 a2s (ve->transport_name,
4084 ve->transport_name);
4088 GNUNET_break_op (0);
4091 if (GNUNET_TIME_absolute_get_remaining (GNUNET_TIME_absolute_ntoh (pong->expiration)).rel_value == 0)
4093 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4094 _("Received expired signature. Check system time.\n"));
4097 GNUNET_STATISTICS_update (stats,
4098 gettext_noop ("# address validation successes"),
4101 /* create the updated HELLO */
4102 GNUNET_CRYPTO_hash (&ve->publicKey,
4103 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4104 &target.hashPubKey);
4105 if (ve->addr != NULL)
4107 avac.done = GNUNET_NO;
4109 hello = GNUNET_HELLO_create (&ve->publicKey,
4110 &add_validated_address,
4112 GNUNET_PEERINFO_add_peer (peerinfo,
4114 GNUNET_free (hello);
4116 n = find_neighbour (&target);
4119 n->publicKey = ve->publicKey;
4120 n->public_key_valid = GNUNET_YES;
4121 fal = add_peer_address (n,
4126 GNUNET_assert (fal != NULL);
4127 fal->expires = GNUNET_TIME_relative_to_absolute (HELLO_ADDRESS_EXPIRATION);
4128 fal->validated = GNUNET_YES;
4129 mark_address_connected (fal);
4130 GNUNET_STATISTICS_update (stats,
4131 gettext_noop ("# peer addresses considered valid"),
4134 fal->latency = GNUNET_TIME_absolute_get_duration (ve->send_time);
4135 update_addr_value (fal, GNUNET_TIME_absolute_get_duration (ve->send_time).rel_value, GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
4137 schedule_next_ping (fal);
4138 if (n->latency.rel_value == GNUNET_TIME_UNIT_FOREVER_REL.rel_value)
4139 n->latency = fal->latency;
4141 n->latency.rel_value = (fal->latency.rel_value + n->latency.rel_value) / 2;
4143 n->distance = fal->distance;
4144 if (GNUNET_NO == n->received_pong)
4146 n->received_pong = GNUNET_YES;
4147 notify_clients_connect (&target, n->latency, n->distance);
4148 if (NULL != (prem = n->pre_connect_message_buffer))
4150 n->pre_connect_message_buffer = NULL;
4151 handle_payload_message (prem, n);
4155 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4157 GNUNET_SCHEDULER_cancel (n->retry_task);
4158 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4159 try_transmission_to_peer (n);
4163 /* clean up validation entry */
4164 GNUNET_assert (GNUNET_YES ==
4165 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4168 abort_validation (NULL, NULL, ve);
4174 * Function that will be called if we receive a validation
4175 * of an address challenge that we transmitted to another
4176 * peer. Note that the validation should only be considered
4177 * acceptable if the challenge matches AND if the sender
4178 * address is at least a plausible address for this peer
4179 * (otherwise we may be seeing a MiM attack).
4181 * @param cls closure
4182 * @param message the pong message
4183 * @param peer who responded to our challenge
4184 * @param sender_address string describing our sender address (as observed
4185 * by the other peer in binary format)
4186 * @param sender_address_len number of bytes in 'sender_address'
4189 handle_pong (void *cls, const struct GNUNET_MessageHeader *message,
4190 const struct GNUNET_PeerIdentity *peer,
4191 const char *sender_address,
4192 size_t sender_address_len)
4194 if (0 == memcmp (peer,
4196 sizeof (struct GNUNET_PeerIdentity)))
4198 /* PONG send to self, ignore */
4199 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4200 "Receiving `%s' message from myself\n",
4204 #if DEBUG_TRANSPORT > 1
4205 /* we get tons of these that just get discarded, only log
4206 if we are quite verbose */
4207 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4208 "Receiving `%s' message from `%4s'.\n", "PONG",
4211 GNUNET_STATISTICS_update (stats,
4212 gettext_noop ("# PONG messages received"),
4215 if (GNUNET_SYSERR !=
4216 GNUNET_CONTAINER_multihashmap_get_multiple (validation_map,
4218 &check_pending_validation,
4221 /* This is *expected* to happen a lot since we send
4222 PONGs to *all* known addresses of the sender of
4223 the PING, so most likely we get multiple PONGs
4224 per PING, and all but the first PONG will end up
4225 here. So really we should not print anything here
4226 unless we want to be very, very verbose... */
4227 #if DEBUG_TRANSPORT > 2
4228 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4229 "Received `%s' message from `%4s' but have no record of a matching `%s' message. Ignoring.\n",
4241 * Try to validate a neighbour's address by sending him our HELLO and a PING.
4243 * @param cls the 'struct ValidationEntry*'
4244 * @param neighbour neighbour to validate, NULL if validation failed
4247 transmit_hello_and_ping (void *cls,
4248 struct NeighbourList *neighbour)
4250 struct ValidationEntry *va = cls;
4251 struct ForeignAddressList *peer_address;
4252 struct TransportPingMessage ping;
4253 uint16_t hello_size;
4256 struct GNUNET_PeerIdentity id;
4259 GNUNET_CRYPTO_hash (&va->publicKey,
4260 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4262 if (neighbour == NULL)
4264 /* FIXME: stats... */
4265 GNUNET_break (GNUNET_OK ==
4266 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4269 abort_validation (NULL, NULL, va);
4272 neighbour->publicKey = va->publicKey;
4273 neighbour->public_key_valid = GNUNET_YES;
4274 peer_address = add_peer_address (neighbour,
4275 va->transport_name, NULL,
4276 (const void*) &va[1],
4278 if (peer_address == NULL)
4280 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4281 "Failed to add peer `%4s' for plugin `%s'\n",
4282 GNUNET_i2s (&neighbour->id),
4283 va->transport_name);
4284 GNUNET_break (GNUNET_OK ==
4285 GNUNET_CONTAINER_multihashmap_remove (validation_map,
4288 abort_validation (NULL, NULL, va);
4291 if (NULL == our_hello)
4292 refresh_hello_task (NULL, NULL);
4293 hello_size = GNUNET_HELLO_size(our_hello);
4294 slen = strlen(va->transport_name) + 1;
4295 tsize = sizeof(struct TransportPingMessage) + hello_size + va->addrlen + slen;
4296 message_buf = GNUNET_malloc(tsize);
4297 ping.challenge = htonl(va->challenge);
4298 ping.header.size = htons(sizeof(struct TransportPingMessage) + slen + va->addrlen);
4299 ping.header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_PING);
4300 memcpy(&ping.target, &neighbour->id, sizeof(struct GNUNET_PeerIdentity));
4301 memcpy(message_buf, our_hello, hello_size);
4302 memcpy(&message_buf[hello_size],
4304 sizeof(struct TransportPingMessage));
4305 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage)],
4308 memcpy(&message_buf[hello_size + sizeof (struct TransportPingMessage) + slen],
4312 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4313 "Performing validation of address `%s' via `%s' for peer `%4s' sending `%s' (%u bytes) and `%s' (%u bytes)\n",
4316 : a2s (va->transport_name,
4317 (const void*) &va[1], va->addrlen),
4319 GNUNET_i2s (&neighbour->id),
4320 "HELLO", hello_size,
4321 "PING", sizeof (struct TransportPingMessage) + va->addrlen + slen);
4324 GNUNET_STATISTICS_update (stats,
4325 gettext_noop ("# PING messages sent for initial validation"),
4328 transmit_to_peer (NULL, peer_address,
4329 GNUNET_SCHEDULER_PRIORITY_DEFAULT,
4330 HELLO_VERIFICATION_TIMEOUT,
4332 GNUNET_YES, neighbour);
4333 GNUNET_free(message_buf);
4338 * Check if the given address is already being validated; if not,
4339 * append the given address to the list of entries that are being be
4340 * validated and initiate validation.
4342 * @param cls closure ('struct CheckHelloValidatedContext *')
4343 * @param tname name of the transport
4344 * @param expiration expiration time
4345 * @param addr the address
4346 * @param addrlen length of the address
4347 * @return GNUNET_OK (always)
4350 run_validation (void *cls,
4352 struct GNUNET_TIME_Absolute expiration,
4356 struct CheckHelloValidatedContext *chvc = cls;
4357 struct GNUNET_PeerIdentity id;
4358 struct TransportPlugin *tp;
4359 struct ValidationEntry *va;
4360 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4361 struct CheckAddressExistsClosure caec;
4362 struct OwnAddressList *oal;
4364 GNUNET_assert (addr != NULL);
4366 GNUNET_STATISTICS_update (stats,
4367 gettext_noop ("# peer addresses scheduled for validation"),
4370 tp = find_transport (tname);
4373 GNUNET_log (GNUNET_ERROR_TYPE_INFO |
4374 GNUNET_ERROR_TYPE_BULK,
4376 ("Transport `%s' not loaded, will not try to validate peer address using this transport.\n"),
4378 GNUNET_STATISTICS_update (stats,
4379 gettext_noop ("# peer addresses not validated (plugin not available)"),
4384 /* check if this is one of our own addresses */
4385 oal = tp->addresses;
4388 if ( (oal->addrlen == addrlen) &&
4389 (0 == memcmp (&oal[1],
4393 /* not plausible, this address is equivalent to our own address! */
4394 GNUNET_STATISTICS_update (stats,
4395 gettext_noop ("# peer addresses not validated (loopback)"),
4402 GNUNET_HELLO_get_key (chvc->hello, &pk);
4403 GNUNET_CRYPTO_hash (&pk,
4405 GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4408 if (is_blacklisted(&id, tp))
4411 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4412 "Attempted to validate blacklisted peer `%s' using `%s'!\n",
4420 caec.addrlen = addrlen;
4421 caec.session = NULL;
4423 caec.exists = GNUNET_NO;
4424 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
4425 &check_address_exists,
4427 if (caec.exists == GNUNET_YES)
4429 /* During validation attempts we will likely trigger the other
4430 peer trying to validate our address which in turn will cause
4431 it to send us its HELLO, so we expect to hit this case rather
4432 frequently. Only print something if we are very verbose. */
4433 #if DEBUG_TRANSPORT > 1
4434 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4435 "Validation of address `%s' via `%s' for peer `%4s' already in progress.\n",
4436 a2s (tname, addr, addrlen),
4440 GNUNET_STATISTICS_update (stats,
4441 gettext_noop ("# peer addresses not validated (in progress)"),
4446 va = GNUNET_malloc (sizeof (struct ValidationEntry) + addrlen);
4449 va->transport_name = GNUNET_strdup (tname);
4450 va->challenge = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_NONCE,
4452 va->send_time = GNUNET_TIME_absolute_get();
4453 va->addr = (const void*) &va[1];
4454 memcpy (&va[1], addr, addrlen);
4455 va->addrlen = addrlen;
4456 GNUNET_HELLO_get_key (chvc->hello,
4458 va->timeout_task = GNUNET_SCHEDULER_add_delayed (HELLO_VERIFICATION_TIMEOUT,
4459 &timeout_hello_validation,
4461 GNUNET_CONTAINER_multihashmap_put (validation_map,
4464 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4465 setup_peer_check_blacklist (&id, GNUNET_NO,
4466 &transmit_hello_and_ping,
4473 * Check if addresses in validated hello "h" overlap with
4474 * those in "chvc->hello" and validate the rest.
4476 * @param cls closure
4477 * @param peer id of the peer, NULL for last call
4478 * @param h hello message for the peer (can be NULL)
4479 * @param err_msg NULL if successful, otherwise contains error message
4482 check_hello_validated (void *cls,
4483 const struct GNUNET_PeerIdentity *peer,
4484 const struct GNUNET_HELLO_Message *h,
4485 const char *err_msg)
4487 struct CheckHelloValidatedContext *chvc = cls;
4488 struct GNUNET_HELLO_Message *plain_hello;
4489 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
4490 struct GNUNET_PeerIdentity target;
4491 struct NeighbourList *n;
4493 if (err_msg != NULL)
4496 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4497 _("Error in communication with PEERINFO service: %s\n"),
4505 GNUNET_STATISTICS_update (stats,
4506 gettext_noop ("# outstanding peerinfo iterate requests"),
4510 if (GNUNET_NO == chvc->hello_known)
4512 /* notify PEERINFO about the peer now, so that we at least
4513 have the public key if some other component needs it */
4514 GNUNET_HELLO_get_key (chvc->hello, &pk);
4515 GNUNET_CRYPTO_hash (&pk,
4516 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4517 &target.hashPubKey);
4518 plain_hello = GNUNET_HELLO_create (&pk,
4521 GNUNET_PEERINFO_add_peer (peerinfo, plain_hello);
4522 GNUNET_free (plain_hello);
4523 #if DEBUG_TRANSPORT_HELLO
4524 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4525 "PEERINFO had no `%s' message for peer `%4s', full validation needed.\n",
4527 GNUNET_i2s (&target));
4529 GNUNET_STATISTICS_update (stats,
4530 gettext_noop ("# new HELLOs requiring full validation"),
4533 GNUNET_HELLO_iterate_addresses (chvc->hello,
4540 GNUNET_STATISTICS_update (stats,
4541 gettext_noop ("# duplicate HELLO (peer known)"),
4546 if (chvc->ve_count == 0)
4548 GNUNET_CONTAINER_DLL_remove (chvc_head,
4557 #if DEBUG_TRANSPORT_HELLO
4558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4559 "PEERINFO had `%s' message for peer `%4s', validating only new addresses.\n",
4563 chvc->hello_known = GNUNET_YES;
4564 n = find_neighbour (peer);
4567 #if DEBUG_TRANSPORT_HELLO
4568 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4569 "Calling hello_iterate_addresses for %s!\n",
4572 GNUNET_HELLO_iterate_addresses (h,
4574 &add_to_foreign_address_list,
4576 try_transmission_to_peer (n);
4580 #if DEBUG_TRANSPORT_HELLO
4581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4582 "No existing neighbor record for %s!\n",
4585 GNUNET_STATISTICS_update (stats,
4586 gettext_noop ("# no existing neighbour record (validating HELLO)"),
4590 GNUNET_STATISTICS_update (stats,
4591 gettext_noop ("# HELLO validations (update case)"),
4594 GNUNET_HELLO_iterate_new_addresses (chvc->hello,
4596 GNUNET_TIME_relative_to_absolute (HELLO_REVALIDATION_START_TIME),
4603 * Process HELLO-message.
4605 * @param plugin transport involved, may be NULL
4606 * @param message the actual message
4607 * @return GNUNET_OK if the HELLO was well-formed, GNUNET_SYSERR otherwise
4610 process_hello (struct TransportPlugin *plugin,
4611 const struct GNUNET_MessageHeader *message)
4614 struct GNUNET_PeerIdentity target;
4615 const struct GNUNET_HELLO_Message *hello;
4616 struct CheckHelloValidatedContext *chvc;
4617 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded publicKey;
4618 struct NeighbourList *n;
4619 #if DEBUG_TRANSPORT_HELLO > 2
4623 hsize = ntohs (message->size);
4624 if ((ntohs (message->type) != GNUNET_MESSAGE_TYPE_HELLO) ||
4625 (hsize < sizeof (struct GNUNET_MessageHeader)))
4628 return GNUNET_SYSERR;
4630 GNUNET_STATISTICS_update (stats,
4631 gettext_noop ("# HELLOs received for validation"),
4635 hello = (const struct GNUNET_HELLO_Message *) message;
4636 if (GNUNET_OK != GNUNET_HELLO_get_key (hello, &publicKey))
4638 #if DEBUG_TRANSPORT_HELLO
4639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4640 "Unable to get public key from `%s' for `%4s'!\n",
4642 GNUNET_i2s (&target));
4644 GNUNET_break_op (0);
4645 return GNUNET_SYSERR;
4647 GNUNET_CRYPTO_hash (&publicKey,
4648 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
4649 &target.hashPubKey);
4651 #if DEBUG_TRANSPORT_HELLO
4652 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4653 "Received `%s' message for `%4s'\n",
4655 GNUNET_i2s (&target));
4657 if (0 == memcmp (&my_identity,
4659 sizeof (struct GNUNET_PeerIdentity)))
4661 GNUNET_STATISTICS_update (stats,
4662 gettext_noop ("# HELLOs ignored for validation (is my own HELLO)"),
4667 n = find_neighbour (&target);
4669 (! n->public_key_valid) )
4671 GNUNET_HELLO_get_key (hello, &n->publicKey);
4672 n->public_key_valid = GNUNET_YES;
4675 /* check if load is too high before doing expensive stuff */
4676 if (GNUNET_SCHEDULER_get_load (GNUNET_SCHEDULER_PRIORITY_BACKGROUND) > MAX_HELLO_LOAD)
4678 GNUNET_STATISTICS_update (stats,
4679 gettext_noop ("# HELLOs ignored due to high load"),
4682 #if DEBUG_TRANSPORT_HELLO
4683 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4684 "Ignoring `%s' for `%4s', load too high.\n",
4686 GNUNET_i2s (&target));
4693 while (NULL != chvc)
4695 if (GNUNET_HELLO_equals (hello,
4697 GNUNET_TIME_absolute_get ()).abs_value > 0)
4699 #if DEBUG_TRANSPORT_HELLO > 2
4700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4701 "Received duplicate `%s' message for `%4s'; ignored\n",
4703 GNUNET_i2s (&target));
4705 return GNUNET_OK; /* validation already pending */
4707 if (GNUNET_HELLO_size (hello) == GNUNET_HELLO_size (chvc->hello))
4708 GNUNET_break (0 != memcmp (hello, chvc->hello,
4709 GNUNET_HELLO_size(hello)));
4714 struct NeighbourList *temp_neighbor = find_neighbour(&target);
4715 if ((NULL != temp_neighbor))
4717 fprintf(stderr, "Already know peer, ignoring hello\n");
4722 #if DEBUG_TRANSPORT_HELLO > 2
4725 my_id = GNUNET_strdup(GNUNET_i2s(plugin->env.my_identity));
4727 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4728 "%s: Starting validation of `%s' message for `%4s' via '%s' of size %u\n",
4731 GNUNET_i2s (&target),
4733 GNUNET_HELLO_size(hello));
4738 chvc = GNUNET_malloc (sizeof (struct CheckHelloValidatedContext) + hsize);
4740 chvc->hello = (const struct GNUNET_HELLO_Message *) &chvc[1];
4741 memcpy (&chvc[1], hello, hsize);
4742 GNUNET_CONTAINER_DLL_insert (chvc_head,
4745 /* finally, check if HELLO was previously validated
4746 (continuation will then schedule actual validation) */
4747 GNUNET_STATISTICS_update (stats,
4748 gettext_noop ("# peerinfo process hello iterate requests"),
4751 GNUNET_STATISTICS_update (stats,
4752 gettext_noop ("# outstanding peerinfo iterate requests"),
4755 chvc->piter = GNUNET_PEERINFO_iterate (peerinfo,
4757 HELLO_VERIFICATION_TIMEOUT,
4758 &check_hello_validated, chvc);
4764 * The peer specified by the given neighbour has timed-out or a plugin
4765 * has disconnected. We may either need to do nothing (other plugins
4766 * still up), or trigger a full disconnect and clean up. This
4767 * function updates our state and does the necessary notifications.
4768 * Also notifies our clients that the neighbour is now officially
4771 * @param n the neighbour list entry for the peer
4772 * @param check GNUNET_YES to check if ALL addresses for this peer
4773 * are gone, GNUNET_NO to force a disconnect of the peer
4774 * regardless of whether other addresses exist.
4777 disconnect_neighbour (struct NeighbourList *n, int check)
4779 struct ReadyList *rpos;
4780 struct NeighbourList *npos;
4781 struct NeighbourList *nprev;
4782 struct MessageQueue *mq;
4783 struct ForeignAddressList *peer_addresses;
4784 struct ForeignAddressList *peer_pos;
4786 if (GNUNET_YES == check)
4789 while (NULL != rpos)
4791 peer_addresses = rpos->addresses;
4792 while (peer_addresses != NULL)
4794 // Do not disconnect if: an address is connected or an inbound address exists
4795 if ((GNUNET_YES == peer_addresses->connected) || (peer_addresses->addrlen == 0))
4798 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4799 "NOT Disconnecting from `%4s', still have live address `%s'!\n",
4800 GNUNET_i2s (&n->id),
4801 a2s (peer_addresses->ready_list->plugin->short_name,
4802 peer_addresses->addr,
4803 peer_addresses->addrlen));
4805 return; /* still connected */
4807 peer_addresses = peer_addresses->next;
4813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4814 "Disconnecting from `%4s'\n",
4815 GNUNET_i2s (&n->id));
4818 /* remove n from neighbours list */
4821 while ((npos != NULL) && (npos != n))
4826 GNUNET_assert (npos != NULL);
4828 neighbours = n->next;
4830 nprev->next = n->next;
4832 /* notify all clients about disconnect */
4833 if (GNUNET_YES == n->received_pong)
4834 notify_clients_disconnect (&n->id);
4836 ats_modify_problem_state(ats, ATS_MODIFIED);
4838 /* clean up all plugins, cancel connections and pending transmissions */
4839 while (NULL != (rpos = n->plugins))
4841 n->plugins = rpos->next;
4842 rpos->plugin->api->disconnect (rpos->plugin->api->cls, &n->id);
4843 while (rpos->addresses != NULL)
4845 peer_pos = rpos->addresses;
4846 rpos->addresses = peer_pos->next;
4847 if (peer_pos->connected == GNUNET_YES)
4848 GNUNET_STATISTICS_update (stats,
4849 gettext_noop ("# connected addresses"),
4852 if (GNUNET_YES == peer_pos->validated)
4853 GNUNET_STATISTICS_update (stats,
4854 gettext_noop ("# peer addresses considered valid"),
4857 if (GNUNET_SCHEDULER_NO_TASK != peer_pos->revalidate_task)
4859 GNUNET_SCHEDULER_cancel (peer_pos->revalidate_task);
4860 peer_pos->revalidate_task = GNUNET_SCHEDULER_NO_TASK;
4862 GNUNET_free(peer_pos->ressources);
4863 peer_pos->ressources = NULL;
4864 GNUNET_free(peer_pos->quality);
4865 peer_pos->ressources = NULL;
4866 GNUNET_free(peer_pos);
4871 /* free all messages on the queue */
4872 while (NULL != (mq = n->messages_head))
4874 GNUNET_STATISTICS_update (stats,
4875 gettext_noop ("# bytes in message queue for other peers"),
4876 - (int64_t) mq->message_buf_size,
4878 GNUNET_STATISTICS_update (stats,
4879 gettext_noop ("# bytes discarded due to disconnect"),
4880 mq->message_buf_size,
4882 GNUNET_CONTAINER_DLL_remove (n->messages_head,
4885 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
4887 sizeof(struct GNUNET_PeerIdentity)));
4891 while (NULL != (mq = n->cont_head))
4894 GNUNET_CONTAINER_DLL_remove (n->cont_head,
4897 GNUNET_assert (0 == memcmp(&mq->neighbour_id,
4899 sizeof(struct GNUNET_PeerIdentity)));
4903 if (n->timeout_task != GNUNET_SCHEDULER_NO_TASK)
4905 GNUNET_SCHEDULER_cancel (n->timeout_task);
4906 n->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4908 if (n->retry_task != GNUNET_SCHEDULER_NO_TASK)
4910 GNUNET_SCHEDULER_cancel (n->retry_task);
4911 n->retry_task = GNUNET_SCHEDULER_NO_TASK;
4913 if (n->piter != NULL)
4915 GNUNET_PEERINFO_iterate_cancel (n->piter);
4916 GNUNET_STATISTICS_update (stats,
4917 gettext_noop ("# outstanding peerinfo iterate requests"),
4922 /* finally, free n itself */
4923 GNUNET_STATISTICS_update (stats,
4924 gettext_noop ("# active neighbours"),
4927 GNUNET_free_non_null (n->pre_connect_message_buffer);
4933 * We have received a PING message from someone. Need to send a PONG message
4934 * in response to the peer by any means necessary.
4937 handle_ping (void *cls, const struct GNUNET_MessageHeader *message,
4938 const struct GNUNET_PeerIdentity *peer,
4939 struct Session *session,
4940 const char *sender_address,
4941 uint16_t sender_address_len)
4943 struct TransportPlugin *plugin = cls;
4944 struct SessionHeader *session_header = (struct SessionHeader*) session;
4945 struct TransportPingMessage *ping;
4946 struct TransportPongMessage *pong;
4947 struct NeighbourList *n;
4948 struct ReadyList *rl;
4949 struct ForeignAddressList *fal;
4950 struct OwnAddressList *oal;
4956 if (ntohs (message->size) < sizeof (struct TransportPingMessage))
4958 GNUNET_break_op (0);
4959 return GNUNET_SYSERR;
4962 ping = (struct TransportPingMessage *) message;
4963 if (0 != memcmp (&ping->target,
4964 plugin->env.my_identity,
4965 sizeof (struct GNUNET_PeerIdentity)))
4968 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4969 _("Received `%s' message from `%s' destined for `%s' which is not me!\n"),
4971 (sender_address != NULL)
4972 ? a2s (plugin->short_name,
4973 (const struct sockaddr *)sender_address,
4976 GNUNET_i2s (&ping->target));
4978 return GNUNET_SYSERR;
4981 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
4982 "Processing `%s' from `%s'\n",
4984 (sender_address != NULL)
4985 ? a2s (plugin->short_name,
4986 (const struct sockaddr *)sender_address,
4990 GNUNET_STATISTICS_update (stats,
4991 gettext_noop ("# PING messages received"),
4994 addr = (const char*) &ping[1];
4995 alen = ntohs (message->size) - sizeof (struct TransportPingMessage);
4996 slen = strlen (plugin->short_name) + 1;
4999 /* peer wants to confirm that we have an outbound connection to him */
5000 if (session == NULL)
5002 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5003 _("Refusing to create PONG since I do not have a session with `%s'.\n"),
5005 return GNUNET_SYSERR;
5007 /* FIXME-urg: the use of 'sender_address' in the code below is doubly-wrong:
5008 1) it is NULL when we need to have a real value
5009 2) it is documented to be the address of the sender (source-IP), where
5010 what we actually want is our LISTEN IP (what we 'bound' to); which we don't even
5013 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5014 "Creating PONG indicating that we received a connection at our address `%s' from `%s'.\n",
5015 a2s (plugin->short_name,
5017 sender_address_len),
5020 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5021 pong->header.size = htons (sizeof (struct TransportPongMessage) + sender_address_len + slen);
5022 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5023 pong->purpose.size =
5024 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5026 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5027 sizeof (struct GNUNET_PeerIdentity) + sender_address_len + slen);
5028 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_USING);
5029 pong->challenge = ping->challenge;
5030 pong->addrlen = htonl(sender_address_len + slen);
5033 sizeof(struct GNUNET_PeerIdentity));
5037 if ((sender_address!=NULL) && (sender_address_len > 0))
5038 memcpy (&((char*)&pong[1])[slen],
5040 sender_address_len);
5041 if (GNUNET_TIME_absolute_get_remaining (session_header->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4)
5043 /* create / update cached sig */
5045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5046 "Creating PONG signature to indicate active connection.\n");
5048 session_header->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5049 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5050 GNUNET_assert (GNUNET_OK ==
5051 GNUNET_CRYPTO_rsa_sign (my_private_key,
5053 &session_header->pong_signature));
5057 pong->expiration = GNUNET_TIME_absolute_hton (session_header->pong_sig_expires);
5059 memcpy (&pong->signature,
5060 &session_header->pong_signature,
5061 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5067 /* peer wants to confirm that this is one of our addresses */
5071 plugin->api->check_address (plugin->api->cls,
5075 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5076 _("Not confirming PING with address `%s' since I cannot confirm having this address.\n"),
5077 a2s (plugin->short_name,
5082 oal = plugin->addresses;
5085 if ( (oal->addrlen == alen) &&
5092 pong = GNUNET_malloc (sizeof (struct TransportPongMessage) + alen + slen);
5093 pong->header.size = htons (sizeof (struct TransportPongMessage) + alen + slen);
5094 pong->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_PONG);
5095 pong->purpose.size =
5096 htonl (sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
5098 sizeof (struct GNUNET_TIME_AbsoluteNBO) +
5099 sizeof (struct GNUNET_PeerIdentity) + alen + slen);
5100 pong->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_TRANSPORT_PONG_OWN);
5101 pong->challenge = ping->challenge;
5102 pong->addrlen = htonl(alen + slen);
5105 sizeof(struct GNUNET_PeerIdentity));
5106 memcpy (&pong[1], plugin->short_name, slen);
5107 memcpy (&((char*)&pong[1])[slen], addr, alen);
5108 if ( (oal != NULL) &&
5109 (GNUNET_TIME_absolute_get_remaining (oal->pong_sig_expires).rel_value < PONG_SIGNATURE_LIFETIME.rel_value / 4) )
5111 /* create / update cached sig */
5113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5114 "Creating PONG signature to indicate ownership.\n");
5116 oal->pong_sig_expires = GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME);
5117 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5118 GNUNET_assert (GNUNET_OK ==
5119 GNUNET_CRYPTO_rsa_sign (my_private_key,
5121 &oal->pong_signature));
5122 memcpy (&pong->signature,
5123 &oal->pong_signature,
5124 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5126 else if (oal == NULL)
5128 /* not using cache (typically DV-only) */
5129 pong->expiration = GNUNET_TIME_absolute_hton (GNUNET_TIME_relative_to_absolute (PONG_SIGNATURE_LIFETIME));
5130 GNUNET_assert (GNUNET_OK ==
5131 GNUNET_CRYPTO_rsa_sign (my_private_key,
5137 /* can used cached version */
5138 pong->expiration = GNUNET_TIME_absolute_hton (oal->pong_sig_expires);
5139 memcpy (&pong->signature,
5140 &oal->pong_signature,
5141 sizeof (struct GNUNET_CRYPTO_RsaSignature));
5144 n = find_neighbour(peer);
5145 GNUNET_assert (n != NULL);
5146 did_pong = GNUNET_NO;
5147 /* first try reliable response transmission */
5151 fal = rl->addresses;
5154 if (-1 != rl->plugin->api->send (rl->plugin->api->cls,
5157 ntohs (pong->header.size),
5158 TRANSPORT_PONG_PRIORITY,
5159 HELLO_VERIFICATION_TIMEOUT,
5166 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5167 "Transmitted PONG to `%s' via reliable mechanism\n",
5170 GNUNET_STATISTICS_update (stats,
5171 gettext_noop ("# PONGs unicast via reliable transport"),
5177 did_pong = GNUNET_YES;
5182 /* no reliable method found, do multicast */
5183 GNUNET_STATISTICS_update (stats,
5184 gettext_noop ("# PONGs multicast to all available addresses"),
5190 fal = rl->addresses;
5193 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5194 "Transmitting PONG to `%s' via unreliable mechanism `%s':%s\n",
5196 a2s (rl->plugin->short_name,
5199 rl->plugin->short_name);
5200 transmit_to_peer(NULL, fal,
5201 TRANSPORT_PONG_PRIORITY,
5202 HELLO_VERIFICATION_TIMEOUT,
5204 ntohs(pong->header.size),
5207 did_pong = GNUNET_YES;
5213 if (GNUNET_YES != did_pong)
5214 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5215 _("Could not send PONG to `%s': no address available\n"),
5222 * Function called by the plugin for each received message. Update
5223 * data volumes, possibly notify plugins about reducing the rate at
5224 * which they read from the socket and generally forward to our
5227 * @param cls the "struct TransportPlugin *" we gave to the plugin
5228 * @param peer (claimed) identity of the other peer
5229 * @param message the message, NULL if we only care about
5230 * learning about the delay until we should receive again
5231 * @param ats_data information for automatic transport selection
5232 * @param ats_count number of elements in ats not including 0-terminator
5233 * @param session identifier used for this session (can be NULL)
5234 * @param sender_address binary address of the sender (if observed)
5235 * @param sender_address_len number of bytes in sender_address
5236 * @return how long in ms the plugin should wait until receiving more data
5237 * (plugins that do not support this, can ignore the return value)
5239 static struct GNUNET_TIME_Relative
5240 plugin_env_receive (void *cls, const struct GNUNET_PeerIdentity *peer,
5241 const struct GNUNET_MessageHeader *message,
5242 const struct GNUNET_TRANSPORT_ATS_Information *ats_data,
5244 struct Session *session,
5245 const char *sender_address,
5246 uint16_t sender_address_len)
5248 struct TransportPlugin *plugin = cls;
5249 struct ReadyList *service_context;
5250 struct ForeignAddressList *peer_address;
5252 struct NeighbourList *n;
5253 struct GNUNET_TIME_Relative ret;
5257 if (0 == memcmp (peer,
5259 sizeof (struct GNUNET_PeerIdentity)))
5261 /* refuse to receive from myself */
5263 return GNUNET_TIME_UNIT_FOREVER_REL;
5265 if (is_blacklisted (peer, plugin))
5266 return GNUNET_TIME_UNIT_FOREVER_REL;
5267 n = find_neighbour (peer);
5269 n = setup_new_neighbour (peer, GNUNET_YES);
5270 service_context = n->plugins;
5271 while ((service_context != NULL) && (plugin != service_context->plugin))
5272 service_context = service_context->next;
5273 GNUNET_assert ((plugin->api->send == NULL) || (service_context != NULL));
5274 peer_address = NULL;
5277 for (c=0; c<ats_count; c++)
5278 if (ntohl(ats_data[c].type) == GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE)
5279 distance = ntohl(ats_data[c].value);
5282 if (message != NULL)
5284 if ( (session != NULL) ||
5285 (sender_address != NULL) )
5286 peer_address = add_peer_address (n,
5290 sender_address_len);
5291 if (peer_address != NULL)
5293 update_addr_ats(peer_address, ats_data, ats_count);
5294 update_addr_value(peer_address, distance, GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5296 peer_address->distance = distance;
5297 if (GNUNET_YES == peer_address->validated)
5298 mark_address_connected (peer_address);
5299 peer_address->timeout
5300 = GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5301 schedule_next_ping (peer_address);
5303 /* update traffic received amount ... */
5304 msize = ntohs (message->size);
5306 GNUNET_STATISTICS_update (stats,
5307 gettext_noop ("# bytes received from other peers"),
5310 n->distance = distance;
5312 GNUNET_TIME_relative_to_absolute
5313 (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT);
5314 GNUNET_SCHEDULER_cancel (n->timeout_task);
5316 GNUNET_SCHEDULER_add_delayed (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT,
5317 &neighbour_timeout_task, n);
5318 if (n->quota_violation_count > QUOTA_VIOLATION_DROP_THRESHOLD)
5320 /* dropping message due to frequent inbound volume violations! */
5321 GNUNET_log (GNUNET_ERROR_TYPE_WARNING |
5322 GNUNET_ERROR_TYPE_BULK,
5324 ("Dropping incoming message due to repeated bandwidth quota (%u b/s) violations (total of %u).\n"),
5325 n->in_tracker.available_bytes_per_s__,
5326 n->quota_violation_count);
5327 GNUNET_STATISTICS_update (stats,
5328 gettext_noop ("# bandwidth quota violations by other peers"),
5331 return GNUNET_CONSTANTS_QUOTA_VIOLATION_TIMEOUT;
5333 if ((ntohs(message->type) == GNUNET_MESSAGE_TYPE_TRANSPORT_ATS) &&
5334 (ntohs(message->size) == (sizeof (struct GNUNET_MessageHeader) + sizeof (uint32_t))))
5336 uint32_t value = ntohl(*((uint32_t *) &message[1]));
5337 //GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "GNUNET_MESSAGE_TYPE_TRANSPORT_ATS: %i \n", value);
5338 /* Force ressource and quality update */
5339 if ((value == 4) && (ats != NULL))
5340 ats_modify_problem_state(ats, ATS_QUALITY_COST_UPDATED);
5341 /* Force cost update */
5342 if ((value == 3) && (ats != NULL))
5343 ats_modify_problem_state(ats, ATS_COST_UPDATED);
5344 /* Force quality update */
5345 if ((value == 2) && (ats != NULL))
5346 ats_modify_problem_state(ats, ATS_QUALITY_UPDATED);
5347 /* Force full rebuild */
5348 if ((value == 1) && (ats != NULL))
5349 ats_modify_problem_state(ats, ATS_MODIFIED);
5353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5354 "Received message of type %u and size %u from `%4s', sending to all clients.\n",
5355 ntohs (message->type),
5356 ntohs (message->size),
5359 switch (ntohs (message->type))
5361 case GNUNET_MESSAGE_TYPE_HELLO:
5362 GNUNET_STATISTICS_update (stats,
5363 gettext_noop ("# HELLO messages received from other peers"),
5366 process_hello (plugin, message);
5368 case GNUNET_MESSAGE_TYPE_TRANSPORT_PING:
5369 handle_ping (plugin, message, peer, session, sender_address, sender_address_len);
5370 if (! n->received_pong)
5371 transmit_plain_ping (n);
5373 case GNUNET_MESSAGE_TYPE_TRANSPORT_PONG:
5374 handle_pong (plugin, message, peer, sender_address, sender_address_len);
5376 case GNUNET_MESSAGE_TYPE_TRANSPORT_ATS:
5379 handle_payload_message (message, n);
5383 ret = GNUNET_BANDWIDTH_tracker_get_delay (&n->in_tracker, 0);
5384 if (ret.rel_value > 0)
5387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5388 "Throttling read (%llu bytes excess at %u b/s), waiting %llu ms before reading more.\n",
5389 (unsigned long long) n->in_tracker.consumption_since_last_update__,
5390 (unsigned int) n->in_tracker.available_bytes_per_s__,
5391 (unsigned long long) ret.rel_value);
5393 GNUNET_STATISTICS_update (stats,
5394 gettext_noop ("# ms throttling suggested"),
5395 (int64_t) ret.rel_value,
5402 * Handle START-message. This is the first message sent to us
5403 * by any client which causes us to add it to our list.
5405 * @param cls closure (always NULL)
5406 * @param client identification of the client
5407 * @param message the actual message
5410 handle_start (void *cls,
5411 struct GNUNET_SERVER_Client *client,
5412 const struct GNUNET_MessageHeader *message)
5414 const struct StartMessage *start;
5415 struct TransportClient *c;
5416 struct ConnectInfoMessage * cim;
5417 struct NeighbourList *n;
5421 start = (const struct StartMessage*) message;
5423 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5424 "Received `%s' request from client\n", "START");
5429 if (c->client == client)
5431 /* client already on our list! */
5433 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5438 if ( (GNUNET_NO != ntohl (start->do_check)) &&
5439 (0 != memcmp (&start->self,
5441 sizeof (struct GNUNET_PeerIdentity))) )
5443 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5444 _("Rejecting control connection from peer `%s', which is not me!\n"),
5445 GNUNET_i2s (&start->self));
5446 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5449 c = GNUNET_malloc (sizeof (struct TransportClient));
5453 if (our_hello != NULL)
5456 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5457 "Sending our own `%s' to new client\n", "HELLO");
5459 transmit_to_client (c,
5460 (const struct GNUNET_MessageHeader *) our_hello,
5462 /* tell new client about all existing connections */
5464 size = sizeof (struct ConnectInfoMessage) + ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information);
5465 if (size > GNUNET_SERVER_MAX_MESSAGE_SIZE)
5469 cim = GNUNET_malloc (size);
5470 cim->header.size = htons (size);
5471 cim->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_CONNECT);
5472 cim->ats_count = htonl(ats_count);
5473 (&(cim->ats))[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
5474 (&(cim->ats))[2].value = htonl (0);
5478 if (GNUNET_YES == n->received_pong)
5480 (&(cim->ats))[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
5481 (&(cim->ats))[0].value = htonl (n->distance);
5482 (&(cim->ats))[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
5483 (&(cim->ats))[1].value = htonl ((uint32_t) n->latency.rel_value);
5485 transmit_to_client (c, &cim->header, GNUNET_NO);
5493 #if DEBUG_TRANSPORT_HELLO
5494 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5495 "No HELLO created yet, will transmit HELLO to client later!\n");
5499 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5504 * Handle HELLO-message.
5506 * @param cls closure (always NULL)
5507 * @param client identification of the client
5508 * @param message the actual message
5511 handle_hello (void *cls,
5512 struct GNUNET_SERVER_Client *client,
5513 const struct GNUNET_MessageHeader *message)
5517 GNUNET_STATISTICS_update (stats,
5518 gettext_noop ("# HELLOs received from clients"),
5521 ret = process_hello (NULL, message);
5522 GNUNET_SERVER_receive_done (client, ret);
5527 * Closure for 'transmit_client_message'; followed by
5528 * 'msize' bytes of the actual message.
5530 struct TransmitClientMessageContext
5533 * Client on whom's behalf we are sending.
5535 struct GNUNET_SERVER_Client *client;
5538 * Timeout for the transmission.
5540 struct GNUNET_TIME_Absolute timeout;
5548 * Size of the message in bytes.
5555 * Schedule transmission of a message we got from a client to a peer.
5557 * @param cls the 'struct TransmitClientMessageContext*'
5558 * @param n destination, or NULL on error (in that case, drop the message)
5561 transmit_client_message (void *cls,
5562 struct NeighbourList *n)
5564 struct TransmitClientMessageContext *tcmc = cls;
5565 struct TransportClient *tc;
5568 while ((tc != NULL) && (tc->client != tcmc->client))
5573 transmit_to_peer (tc, NULL, tcmc->priority,
5574 GNUNET_TIME_absolute_get_remaining (tcmc->timeout),
5576 tcmc->msize, GNUNET_NO, n);
5578 GNUNET_SERVER_receive_done (tcmc->client, GNUNET_OK);
5579 GNUNET_SERVER_client_drop (tcmc->client);
5585 * Handle SEND-message.
5587 * @param cls closure (always NULL)
5588 * @param client identification of the client
5589 * @param message the actual message
5592 handle_send (void *cls,
5593 struct GNUNET_SERVER_Client *client,
5594 const struct GNUNET_MessageHeader *message)
5596 const struct OutboundMessage *obm;
5597 const struct GNUNET_MessageHeader *obmm;
5598 struct TransmitClientMessageContext *tcmc;
5602 size = ntohs (message->size);
5604 sizeof (struct OutboundMessage) + sizeof (struct GNUNET_MessageHeader))
5607 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5610 GNUNET_STATISTICS_update (stats,
5611 gettext_noop ("# payload received for other peers"),
5614 obm = (const struct OutboundMessage *) message;
5615 obmm = (const struct GNUNET_MessageHeader *) &obm[1];
5616 msize = size - sizeof (struct OutboundMessage);
5618 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5619 "Received `%s' request from client with target `%4s' and message of type %u and size %u\n",
5620 "SEND", GNUNET_i2s (&obm->peer),
5624 tcmc = GNUNET_malloc (sizeof (struct TransmitClientMessageContext) + msize);
5625 tcmc->client = client;
5626 tcmc->priority = ntohl (obm->priority);
5627 tcmc->timeout = GNUNET_TIME_relative_to_absolute (GNUNET_TIME_relative_ntoh (obm->timeout));
5628 tcmc->msize = msize;
5629 /* FIXME: this memcpy can be up to 7% of our total runtime */
5630 memcpy (&tcmc[1], obmm, msize);
5631 GNUNET_SERVER_client_keep (client);
5632 setup_peer_check_blacklist (&obm->peer, GNUNET_YES,
5633 &transmit_client_message,
5639 * Handle request connect message
5641 * @param cls closure (always NULL)
5642 * @param client identification of the client
5643 * @param message the actual message
5646 handle_request_connect (void *cls,
5647 struct GNUNET_SERVER_Client *client,
5648 const struct GNUNET_MessageHeader *message)
5650 const struct TransportRequestConnectMessage *trcm =
5651 (const struct TransportRequestConnectMessage *) message;
5653 GNUNET_STATISTICS_update (stats,
5654 gettext_noop ("# REQUEST CONNECT messages received"),
5658 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
5659 "Received a request connect message for peer `%s'\n",
5660 GNUNET_i2s(&trcm->peer));
5662 setup_peer_check_blacklist (&trcm->peer, GNUNET_YES,
5664 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5669 * Handle SET_QUOTA-message.
5671 * @param cls closure (always NULL)
5672 * @param client identification of the client
5673 * @param message the actual message
5676 handle_set_quota (void *cls,
5677 struct GNUNET_SERVER_Client *client,
5678 const struct GNUNET_MessageHeader *message)
5680 const struct QuotaSetMessage *qsm =
5681 (const struct QuotaSetMessage *) message;
5682 struct NeighbourList *n;
5684 GNUNET_STATISTICS_update (stats,
5685 gettext_noop ("# SET QUOTA messages received"),
5688 n = find_neighbour (&qsm->peer);
5691 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5692 GNUNET_STATISTICS_update (stats,
5693 gettext_noop ("# SET QUOTA messages ignored (no such peer)"),
5699 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5700 "Received `%s' request (new quota %u, old quota %u) from client for peer `%4s'\n",
5702 (unsigned int) ntohl (qsm->quota.value__),
5703 (unsigned int) n->in_tracker.available_bytes_per_s__,
5704 GNUNET_i2s (&qsm->peer));
5706 GNUNET_BANDWIDTH_tracker_update_quota (&n->in_tracker,
5708 if (0 == ntohl (qsm->quota.value__))
5711 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5712 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&n->id),
5715 GNUNET_STATISTICS_update (stats,
5716 gettext_noop ("# disconnects due to quota of 0"),
5719 disconnect_neighbour (n, GNUNET_NO);
5721 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5726 * Take the given address and append it to the set of results sent back to
5729 * @param cls the transmission context used ('struct GNUNET_SERVER_TransmitContext*')
5730 * @param address the resolved name, NULL to indicate the last response
5733 transmit_address_to_client (void *cls, const char *address)
5735 struct GNUNET_SERVER_TransmitContext *tc = cls;
5738 if (NULL != address)
5740 slen = strlen (address) + 1;
5741 GNUNET_SERVER_transmit_context_append_data (tc, address, slen,
5742 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5746 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
5752 * Handle AddressLookup-message.
5754 * @param cls closure (always NULL)
5755 * @param client identification of the client
5756 * @param message the actual message
5759 handle_address_lookup (void *cls,
5760 struct GNUNET_SERVER_Client *client,
5761 const struct GNUNET_MessageHeader *message)
5763 const struct AddressLookupMessage *alum;
5764 struct TransportPlugin *lsPlugin;
5765 const char *nameTransport;
5766 const char *address;
5768 struct GNUNET_SERVER_TransmitContext *tc;
5769 struct GNUNET_TIME_Absolute timeout;
5770 struct GNUNET_TIME_Relative rtimeout;
5773 size = ntohs (message->size);
5774 if (size < sizeof (struct AddressLookupMessage))
5776 GNUNET_break_op (0);
5777 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5780 alum = (const struct AddressLookupMessage *) message;
5781 uint32_t addressLen = ntohl (alum->addrlen);
5782 if (size <= sizeof (struct AddressLookupMessage) + addressLen)
5784 GNUNET_break_op (0);
5785 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5788 address = (const char *) &alum[1];
5789 nameTransport = (const char *) &address[addressLen];
5791 [size - sizeof (struct AddressLookupMessage) - addressLen - 1] != '\0')
5793 GNUNET_break_op (0);
5794 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5797 timeout = GNUNET_TIME_absolute_ntoh (alum->timeout);
5798 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5799 numeric = ntohl (alum->numeric_only);
5800 lsPlugin = find_transport (nameTransport);
5801 if (NULL == lsPlugin)
5803 tc = GNUNET_SERVER_transmit_context_create (client);
5804 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5805 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5806 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
5809 GNUNET_SERVER_disable_receive_done_warning (client);
5810 tc = GNUNET_SERVER_transmit_context_create (client);
5811 lsPlugin->api->address_pretty_printer (lsPlugin->api->cls,
5813 address, addressLen,
5816 &transmit_address_to_client, tc);
5820 * Handle PeerAddressLookupMessage.
5822 * @param cls closure (always NULL)
5823 * @param client identification of the client
5824 * @param message the actual message
5827 handle_peer_address_lookup (void *cls,
5828 struct GNUNET_SERVER_Client *client,
5829 const struct GNUNET_MessageHeader *message)
5831 const struct PeerAddressLookupMessage *peer_address_lookup;
5832 struct NeighbourList *neighbor_iterator;
5833 struct ReadyList *ready_iterator;
5834 struct ForeignAddressList *foreign_address_iterator;
5835 struct TransportPlugin *transport_plugin;
5838 struct GNUNET_SERVER_TransmitContext *tc;
5839 struct GNUNET_TIME_Absolute timeout;
5840 struct GNUNET_TIME_Relative rtimeout;
5843 size = ntohs (message->size);
5844 if (size < sizeof (struct PeerAddressLookupMessage))
5846 GNUNET_break_op (0);
5847 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5850 peer_address_lookup = (const struct PeerAddressLookupMessage *) message;
5852 timeout = GNUNET_TIME_absolute_ntoh (peer_address_lookup->timeout);
5853 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5855 neighbor_iterator = neighbours;
5856 while (neighbor_iterator != NULL)
5858 if (0 == memcmp(&neighbor_iterator->id, &peer_address_lookup->peer, sizeof(struct GNUNET_PeerIdentity)))
5860 neighbor_iterator = neighbor_iterator->next;
5863 /* Found no neighbor matching this peer id (shouldn't be possible, but...) */
5864 if (neighbor_iterator == NULL)
5867 tc = GNUNET_SERVER_transmit_context_create (client);
5868 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5869 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5870 GNUNET_SERVER_transmit_context_run (tc, rtimeout);
5874 ready_iterator = neighbor_iterator->plugins;
5875 GNUNET_SERVER_disable_receive_done_warning (client);
5876 tc = GNUNET_SERVER_transmit_context_create (client);
5877 while(ready_iterator != NULL)
5879 foreign_address_iterator = ready_iterator->addresses;
5880 while (foreign_address_iterator != NULL)
5882 transport_plugin = foreign_address_iterator->ready_list->plugin;
5883 if (foreign_address_iterator->addr != NULL)
5885 GNUNET_asprintf (&addr_buf, "%s --- %s",
5886 a2s (transport_plugin->short_name,
5887 foreign_address_iterator->addr,
5888 foreign_address_iterator->addrlen),
5889 (foreign_address_iterator->connected
5890 == GNUNET_YES) ? "CONNECTED"
5892 transmit_address_to_client(tc, addr_buf);
5893 GNUNET_free(addr_buf);
5895 else if (foreign_address_iterator->addrlen == 0)
5897 GNUNET_asprintf (&addr_buf, "%s --- %s", "<inbound>",
5898 (foreign_address_iterator->connected
5899 == GNUNET_YES) ? "CONNECTED"
5901 transmit_address_to_client (tc, addr_buf);
5902 GNUNET_free(addr_buf);
5905 foreign_address_iterator = foreign_address_iterator->next;
5907 ready_iterator = ready_iterator->next;
5909 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5910 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
5911 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
5915 * Handle AddressIterateMessage
5917 * @param cls closure (always NULL)
5918 * @param client identification of the client
5919 * @param message the actual message
5922 handle_address_iterate (void *cls,
5923 struct GNUNET_SERVER_Client *client,
5924 const struct GNUNET_MessageHeader *message)
5926 const struct AddressIterateMessage *address_iterate;
5927 struct NeighbourList *neighbor_iterator;
5928 struct ReadyList *ready_iterator;
5929 struct ForeignAddressList *foreign_address_iterator;
5930 struct TransportPlugin *transport_plugin;
5933 struct GNUNET_SERVER_TransmitContext *tc;
5934 struct GNUNET_TIME_Absolute timeout;
5935 struct GNUNET_TIME_Relative rtimeout;
5938 size = ntohs (message->size);
5939 if (size < sizeof (struct AddressIterateMessage))
5941 GNUNET_break_op (0);
5942 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5945 address_iterate = (const struct AddressIterateMessage *) message;
5947 timeout = GNUNET_TIME_absolute_ntoh (address_iterate->timeout);
5948 rtimeout = GNUNET_TIME_absolute_get_remaining (timeout);
5950 GNUNET_SERVER_disable_receive_done_warning (client);
5951 tc = GNUNET_SERVER_transmit_context_create (client);
5953 neighbor_iterator = neighbours;
5954 while (neighbor_iterator != NULL)
5956 ready_iterator = neighbor_iterator->plugins;
5957 while (ready_iterator != NULL)
5959 foreign_address_iterator = ready_iterator->addresses;
5960 while (foreign_address_iterator != NULL)
5962 transport_plugin = foreign_address_iterator->ready_list->plugin;
5963 if (foreign_address_iterator->addr != NULL)
5965 GNUNET_asprintf (&addr_buf, "%s:%s --- %s, %s",
5966 GNUNET_i2s(&neighbor_iterator->id),
5967 a2s (transport_plugin->short_name,
5968 foreign_address_iterator->addr,
5969 foreign_address_iterator->addrlen),
5970 (foreign_address_iterator->connected
5971 == GNUNET_YES) ? "CONNECTED"
5973 (foreign_address_iterator->validated
5974 == GNUNET_YES) ? "VALIDATED"
5976 transmit_address_to_client (tc, addr_buf);
5977 GNUNET_free(addr_buf);
5979 else if (foreign_address_iterator->addrlen == 0)
5981 GNUNET_asprintf (&addr_buf, "%s:%s --- %s",
5982 GNUNET_i2s (&neighbor_iterator->id),
5984 (foreign_address_iterator->connected
5985 == GNUNET_YES) ? "CONNECTED"
5987 transmit_address_to_client (tc, addr_buf);
5988 GNUNET_free(addr_buf);
5991 foreign_address_iterator = foreign_address_iterator->next;
5993 ready_iterator = ready_iterator->next;
5995 neighbor_iterator = neighbor_iterator->next;
5998 GNUNET_SERVER_transmit_context_append_data (tc, NULL, 0,
5999 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_REPLY);
6000 GNUNET_SERVER_transmit_context_run (tc, GNUNET_TIME_UNIT_FOREVER_REL);
6005 * Setup the environment for this plugin.
6008 create_environment (struct TransportPlugin *plug)
6010 plug->env.cfg = cfg;
6011 plug->env.my_identity = &my_identity;
6012 plug->env.our_hello = &our_hello;
6013 plug->env.cls = plug;
6014 plug->env.receive = &plugin_env_receive;
6015 plug->env.notify_address = &plugin_env_notify_address;
6016 plug->env.session_end = &plugin_env_session_end;
6017 plug->env.max_connections = max_connect_per_transport;
6018 plug->env.stats = stats;
6023 * Start the specified transport (load the plugin).
6026 start_transport (struct GNUNET_SERVER_Handle *server,
6029 struct TransportPlugin *plug;
6032 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6033 _("Loading `%s' transport plugin\n"), name);
6034 GNUNET_asprintf (&libname, "libgnunet_plugin_transport_%s", name);
6035 plug = GNUNET_malloc (sizeof (struct TransportPlugin));
6036 create_environment (plug);
6037 plug->short_name = GNUNET_strdup (name);
6038 plug->lib_name = libname;
6039 plug->next = plugins;
6041 plug->api = GNUNET_PLUGIN_load (libname, &plug->env);
6042 if (plug->api == NULL)
6044 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6045 _("Failed to load transport plugin for `%s'\n"), name);
6046 GNUNET_free (plug->short_name);
6047 plugins = plug->next;
6048 GNUNET_free (libname);
6055 * Called whenever a client is disconnected. Frees our
6056 * resources associated with that client.
6058 * @param cls closure
6059 * @param client identification of the client
6062 client_disconnect_notification (void *cls,
6063 struct GNUNET_SERVER_Client *client)
6065 struct TransportClient *pos;
6066 struct TransportClient *prev;
6067 struct ClientMessageQueueEntry *mqe;
6068 struct Blacklisters *bl;
6069 struct BlacklistCheck *bc;
6074 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
6075 "Client disconnected, cleaning up.\n");
6077 /* clean up blacklister */
6081 if (bl->client == client)
6086 if (bc->bl_pos == bl)
6088 bc->bl_pos = bl->next;
6091 GNUNET_CONNECTION_notify_transmit_ready_cancel (bc->th);
6094 if (bc->task == GNUNET_SCHEDULER_NO_TASK)
6095 bc->task = GNUNET_SCHEDULER_add_now (&do_blacklist_check,
6101 GNUNET_CONTAINER_DLL_remove (bl_head,
6104 GNUNET_SERVER_client_drop (bl->client);
6110 /* clean up 'normal' clients */
6113 while ((pos != NULL) && (pos->client != client))
6120 while (NULL != (mqe = pos->message_queue_head))
6122 GNUNET_CONTAINER_DLL_remove (pos->message_queue_head,
6123 pos->message_queue_tail,
6125 pos->message_count--;
6129 clients = pos->next;
6131 prev->next = pos->next;
6132 if (GNUNET_YES == pos->tcs_pending)
6137 if (pos->th != NULL)
6139 GNUNET_CONNECTION_notify_transmit_ready_cancel (pos->th);
6142 GNUNET_break (0 == pos->message_count);
6148 * Function called when the service shuts down. Unloads our plugins
6149 * and cancels pending validations.
6151 * @param cls closure, unused
6152 * @param tc task context (unused)
6155 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6157 struct TransportPlugin *plug;
6158 struct TransportPlugin *tmp;
6159 struct OwnAddressList *al;
6160 struct CheckHelloValidatedContext *chvc;
6162 shutdown_in_progress = GNUNET_YES;
6163 while (neighbours != NULL)
6166 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6167 "Disconnecting peer `%4s', %s\n", GNUNET_i2s(&neighbours->id),
6170 disconnect_neighbour (neighbours, GNUNET_NO);
6173 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6174 "Transport service is unloading plugins...\n");
6177 while (plug != NULL)
6179 if (plug->address_update_task != GNUNET_SCHEDULER_NO_TASK)
6181 GNUNET_SCHEDULER_cancel (plug->address_update_task);
6182 plug->address_update_task = GNUNET_SCHEDULER_NO_TASK;
6184 GNUNET_break (NULL == GNUNET_PLUGIN_unload (plug->lib_name, plug->api));
6185 GNUNET_free (plug->lib_name);
6186 GNUNET_free (plug->short_name);
6187 while (NULL != (al = plug->addresses))
6189 plug->addresses = al->next;
6196 if (my_private_key != NULL)
6197 GNUNET_CRYPTO_rsa_key_free (my_private_key);
6198 GNUNET_free_non_null (our_hello);
6200 GNUNET_CONTAINER_multihashmap_iterate (validation_map,
6203 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6204 validation_map = NULL;
6207 if (ats_task != GNUNET_SCHEDULER_NO_TASK)
6209 GNUNET_SCHEDULER_cancel(ats_task);
6210 ats_task = GNUNET_SCHEDULER_NO_TASK;
6215 /* free 'chvc' data structure */
6216 while (NULL != (chvc = chvc_head))
6218 chvc_head = chvc->next;
6219 if (chvc->piter != NULL)
6221 GNUNET_PEERINFO_iterate_cancel (chvc->piter);
6222 GNUNET_STATISTICS_update (stats,
6223 gettext_noop ("# outstanding peerinfo iterate requests"),
6230 GNUNET_assert (chvc->ve_count == 0);
6237 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6240 if (peerinfo != NULL)
6242 GNUNET_PEERINFO_disconnect (peerinfo);
6245 if (GNUNET_SCHEDULER_NO_TASK != hello_task)
6247 GNUNET_SCHEDULER_cancel (hello_task);
6248 hello_task = GNUNET_SCHEDULER_NO_TASK;
6250 /* Can we assume those are gone by now, or do we need to clean up
6252 GNUNET_break (bl_head == NULL);
6253 GNUNET_break (bc_head == NULL);
6257 void ats_result_cb ()
6259 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6260 "ATS Result callback\n");
6264 void create_ats_information ( struct ATS_peer **p,
6266 struct ATS_mechanism ** m,
6270 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6271 "ATS requires clean address information\n");
6273 struct ATS_mechanism * mechanisms;
6274 struct ATS_peer *peers;
6276 int connected_addresses = 0;
6279 struct NeighbourList *next = neighbours;
6283 int found_addresses = GNUNET_NO;
6284 struct ReadyList *r_next = next->plugins;
6285 while (r_next != NULL)
6287 struct ForeignAddressList * a_next = r_next->addresses;
6288 while (a_next != NULL)
6291 found_addresses = GNUNET_YES;
6292 a_next = a_next->next;
6294 r_next = r_next->next;
6296 if (found_addresses) c_peers++;
6301 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6302 "Found %u peers with % u transport mechanisms\n", c_peers, c_mechs);
6305 if ((c_peers == 0) && (c_mechs == 0))
6314 mechanisms = GNUNET_malloc((1+c_mechs) * sizeof (struct ATS_mechanism));
6315 peers = GNUNET_malloc((1+c_peers) * sizeof (struct ATS_peer));
6323 int found_addresses = GNUNET_NO;
6324 struct ReadyList *r_next = next->plugins;
6325 while (r_next != NULL)
6327 struct ForeignAddressList * a_next = r_next->addresses;
6328 while (a_next != NULL)
6330 if (a_next->connected == GNUNET_YES)
6331 connected_addresses ++;
6332 if (found_addresses == GNUNET_NO)
6334 peers[c_peers].peer = next->id;
6335 peers[c_peers].m_head = NULL;
6336 peers[c_peers].m_tail = NULL;
6337 peers[c_peers].f = 1.0 / c_mechs;
6340 mechanisms[c_mechs].addr = a_next;
6341 mechanisms[c_mechs].col_index = c_mechs;
6342 mechanisms[c_mechs].peer = &peers[c_peers];
6343 mechanisms[c_mechs].next = NULL;
6344 mechanisms[c_mechs].plugin = r_next->plugin;
6345 mechanisms[c_mechs].ressources = a_next->ressources;
6346 mechanisms[c_mechs].quality = a_next->quality;
6348 GNUNET_CONTAINER_DLL_insert_tail(peers[c_peers].m_head,
6349 peers[c_peers].m_tail,
6350 &mechanisms[c_mechs]);
6351 found_addresses = GNUNET_YES;
6354 a_next = a_next->next;
6356 r_next = r_next->next;
6358 if (found_addresses == GNUNET_YES)
6369 GNUNET_STATISTICS_set(stats,
6370 gettext_noop ("# connected addresses"),
6371 connected_addresses,
6376 schedule_ats (void *cls,
6377 const struct GNUNET_SCHEDULER_TaskContext *tc)
6379 struct ATS_Handle *ats = (struct ATS_Handle *) cls;
6383 ats_task = GNUNET_SCHEDULER_NO_TASK;
6384 if ( (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
6387 if (shutdown_in_progress == GNUNET_YES)
6390 struct GNUNET_TIME_Relative delta =
6391 GNUNET_TIME_absolute_get_difference (last_ats_execution, GNUNET_TIME_absolute_get());
6392 if (delta.rel_value < ats_minimum_interval.rel_value)
6395 GNUNET_log (GNUNET_ERROR_TYPE_BULK,
6396 "Minimum time between cycles not reached\n");
6402 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Running scheduled calculation\n");
6404 ats_calculate_bandwidth_distribution (ats, stats);
6405 last_ats_execution = GNUNET_TIME_absolute_get();
6407 ats_task = GNUNET_SCHEDULER_add_delayed (ats_regular_interval,
6408 &schedule_ats, ats);
6411 struct ForeignAddressList * get_preferred_ats_address (
6412 struct NeighbourList *n)
6414 // TODO get ATS prefered address
6415 return find_ready_address(n);
6419 * Initiate transport service.
6421 * @param cls closure
6422 * @param server the initialized server
6423 * @param c configuration to use
6427 struct GNUNET_SERVER_Handle *server,
6428 const struct GNUNET_CONFIGURATION_Handle *c)
6430 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
6431 {&handle_start, NULL,
6432 GNUNET_MESSAGE_TYPE_TRANSPORT_START, sizeof (struct StartMessage)},
6433 {&handle_hello, NULL,
6434 GNUNET_MESSAGE_TYPE_HELLO, 0},
6435 {&handle_send, NULL,
6436 GNUNET_MESSAGE_TYPE_TRANSPORT_SEND, 0},
6437 {&handle_request_connect, NULL,
6438 GNUNET_MESSAGE_TYPE_TRANSPORT_REQUEST_CONNECT, sizeof(struct TransportRequestConnectMessage)},
6439 {&handle_set_quota, NULL,
6440 GNUNET_MESSAGE_TYPE_TRANSPORT_SET_QUOTA, sizeof (struct QuotaSetMessage)},
6441 {&handle_address_lookup, NULL,
6442 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_LOOKUP,
6444 {&handle_peer_address_lookup, NULL,
6445 GNUNET_MESSAGE_TYPE_TRANSPORT_PEER_ADDRESS_LOOKUP,
6447 {&handle_address_iterate, NULL,
6448 GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE,
6450 {&handle_blacklist_init, NULL,
6451 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT, sizeof (struct GNUNET_MessageHeader)},
6452 {&handle_blacklist_reply, NULL,
6453 GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY, sizeof (struct BlacklistMessage)},
6459 unsigned long long tneigh;
6462 shutdown_in_progress = GNUNET_NO;
6464 stats = GNUNET_STATISTICS_create ("transport", cfg);
6465 validation_map = GNUNET_CONTAINER_multihashmap_create (64);
6466 /* parse configuration */
6468 GNUNET_CONFIGURATION_get_value_number (c,
6473 GNUNET_CONFIGURATION_get_value_filename (c,
6475 "HOSTKEY", &keyfile)))
6477 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6479 ("Transport service is lacking key configuration settings. Exiting.\n"));
6480 GNUNET_SCHEDULER_shutdown ();
6483 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6486 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6487 validation_map = NULL;
6491 max_connect_per_transport = (uint32_t) tneigh;
6492 peerinfo = GNUNET_PEERINFO_connect (cfg);
6493 if (peerinfo == NULL)
6495 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6496 _("Could not access PEERINFO service. Exiting.\n"));
6497 GNUNET_SCHEDULER_shutdown ();
6500 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6503 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6504 validation_map = NULL;
6505 GNUNET_free (keyfile);
6508 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
6509 GNUNET_free (keyfile);
6510 if (my_private_key == NULL)
6512 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6514 ("Transport service could not access hostkey. Exiting.\n"));
6515 GNUNET_SCHEDULER_shutdown ();
6518 GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
6521 GNUNET_CONTAINER_multihashmap_destroy (validation_map);
6522 validation_map = NULL;
6525 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
6526 GNUNET_CRYPTO_hash (&my_public_key,
6527 sizeof (my_public_key), &my_identity.hashPubKey);
6528 /* setup notification */
6529 GNUNET_SERVER_disconnect_notify (server,
6530 &client_disconnect_notification, NULL);
6531 /* load plugins... */
6534 GNUNET_CONFIGURATION_get_value_string (c,
6535 "TRANSPORT", "PLUGINS", &plugs))
6537 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6538 _("Starting transport plugins `%s'\n"), plugs);
6539 pos = strtok (plugs, " ");
6542 start_transport (server, pos);
6544 pos = strtok (NULL, " ");
6546 GNUNET_free (plugs);
6548 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
6549 &shutdown_task, NULL);
6553 /* Initializing ATS */
6556 unsigned long long value;
6561 int v_b_min = 64000;
6564 ats_minimum_interval = ATS_MIN_INTERVAL;
6565 ats_regular_interval = ATS_EXEC_INTERVAL;
6567 /* loading cost ressources */
6568 for (co=0; co<available_ressources; co++)
6570 GNUNET_asprintf(§ion,"%s_UP",ressources[co].cfg_param);
6571 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
6573 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg,
6579 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6580 "Found ressource cost: [%s] = %llu\n",
6583 ressources[co].c_max = value;
6586 GNUNET_free (section);
6587 GNUNET_asprintf(§ion,"%s_DOWN",ressources[co].cfg_param);
6588 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", section))
6590 if (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg,
6596 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6597 "Found ressource cost: [%s] = %llu\n",
6600 ressources[co].c_min = value;
6603 GNUNET_free (section);
6606 ats = ats_init (D, U, R, v_b_min, v_n_min,
6607 ATS_MAX_ITERATIONS, ATS_MAX_EXEC_DURATION,
6608 create_ats_information,
6611 int log_problem = GNUNET_NO;
6612 int log_solution = GNUNET_NO;
6613 int overwrite_dump = GNUNET_NO;
6614 int minimum_peers = 0;
6615 int minimum_addresses = 0;
6617 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MLP"))
6618 log_problem = GNUNET_CONFIGURATION_get_value_yesno (cfg,
6619 "transport","DUMP_MLP");
6621 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_SOLUTION"))
6622 log_solution = GNUNET_CONFIGURATION_get_value_yesno (cfg,
6623 "transport","DUMP_SOLUTION");
6624 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_OVERWRITE"))
6625 overwrite_dump = GNUNET_CONFIGURATION_get_value_yesno (cfg,
6626 "transport","DUMP_OVERWRITE");
6627 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "DUMP_MIN_PEERS"))
6629 GNUNET_CONFIGURATION_get_value_number(cfg,
6630 "transport","DUMP_MIN_PEERS", &value);
6631 minimum_peers = value;
6633 if (GNUNET_CONFIGURATION_have_value(cfg,
6634 "transport", "DUMP_MIN_ADDRS"))
6636 GNUNET_CONFIGURATION_get_value_number(cfg,
6637 "transport","DUMP_MIN_ADDRS", &value);
6638 minimum_addresses= value;
6640 if (GNUNET_CONFIGURATION_have_value(cfg,
6641 "transport", "DUMP_OVERWRITE"))
6643 GNUNET_CONFIGURATION_get_value_number(cfg,
6644 "transport","DUMP_OVERWRITE", &value);
6645 overwrite_dump = value;
6648 if (GNUNET_CONFIGURATION_have_value(cfg,
6649 "transport", "ATS_MIN_INTERVAL"))
6651 GNUNET_CONFIGURATION_get_value_number(cfg,
6652 "transport","ATS_MIN_INTERVAL", &value);
6653 ats_minimum_interval.rel_value = value;
6656 if (GNUNET_CONFIGURATION_have_value(cfg,
6657 "transport", "ATS_EXEC_INTERVAL"))
6659 GNUNET_CONFIGURATION_get_value_number(cfg,
6660 "transport","ATS_EXEC_INTERVAL", &value);
6661 ats_regular_interval.rel_value = value;
6663 if (GNUNET_CONFIGURATION_have_value(cfg, "transport", "ATS_MIN_INTERVAL"))
6665 GNUNET_CONFIGURATION_get_value_number(cfg,
6666 "transport","ATS_MIN_INTERVAL", &value);
6667 ats_minimum_interval.rel_value = value;
6670 ats_set_logging_options (ats,
6678 ats_task = GNUNET_SCHEDULER_add_now (&schedule_ats, ats);
6684 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6685 _("Transport service ready.\n"));
6687 /* If we have a blacklist file, read from it */
6688 read_blacklist_file(cfg);
6689 /* process client requests */
6690 GNUNET_SERVER_add_handlers (server, handlers);
6695 * The main function for the transport service.
6697 * @param argc number of arguments from the command line
6698 * @param argv command line arguments
6699 * @return 0 ok, 1 on error
6702 main (int argc, char *const *argv)
6704 a2s (NULL, NULL, 0); /* make compiler happy */
6705 return (GNUNET_OK ==
6706 GNUNET_SERVICE_run (argc,
6709 GNUNET_SERVICE_OPTION_NONE,
6710 &run, NULL)) ? 0 : 1;
6713 /* end of gnunet-service-transport.c */